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8d08fdba | 1 | /* Handle parameterized types (templates) for GNU C++. |
3febd123 | 2 | Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
4514aa8c | 3 | 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. |
8d08fdba | 4 | Written by Ken Raeburn (raeburn@cygnus.com) while at Watchmaker Computing. |
fc378698 | 5 | Rewritten by Jason Merrill (jason@cygnus.com). |
8d08fdba | 6 | |
f5adbb8d | 7 | This file is part of GCC. |
8d08fdba | 8 | |
f5adbb8d | 9 | GCC is free software; you can redistribute it and/or modify |
8d08fdba MS |
10 | it under the terms of the GNU General Public License as published by |
11 | the Free Software Foundation; either version 2, or (at your option) | |
12 | any later version. | |
13 | ||
f5adbb8d | 14 | GCC is distributed in the hope that it will be useful, |
8d08fdba MS |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
f5adbb8d | 20 | along with GCC; see the file COPYING. If not, write to |
1788952f KC |
21 | the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
22 | Boston, MA 02110-1301, USA. */ | |
8d08fdba MS |
23 | |
24 | /* Known bugs or deficiencies include: | |
e92cc029 | 25 | |
e92cc029 MS |
26 | all methods must be provided in header files; can't use a source |
27 | file that contains only the method templates and "just win". */ | |
8d08fdba MS |
28 | |
29 | #include "config.h" | |
8d052bc7 | 30 | #include "system.h" |
4977bab6 ZW |
31 | #include "coretypes.h" |
32 | #include "tm.h" | |
8d08fdba | 33 | #include "obstack.h" |
8d08fdba | 34 | #include "tree.h" |
0c58f841 | 35 | #include "pointer-set.h" |
8d08fdba | 36 | #include "flags.h" |
e58a9aa1 | 37 | #include "c-common.h" |
8d08fdba | 38 | #include "cp-tree.h" |
e58a9aa1 | 39 | #include "cp-objcp-common.h" |
25af8512 | 40 | #include "tree-inline.h" |
8d08fdba | 41 | #include "decl.h" |
e8abc66f | 42 | #include "output.h" |
49c249e1 | 43 | #include "except.h" |
54f92bfb | 44 | #include "toplev.h" |
3dcaad8b | 45 | #include "rtl.h" |
297a5329 | 46 | #include "timevar.h" |
325c3691 | 47 | #include "tree-iterator.h" |
49c249e1 | 48 | |
050367a3 MM |
49 | /* The type of functions taking a tree, and some additional data, and |
50 | returning an int. */ | |
3a978d72 | 51 | typedef int (*tree_fn_t) (tree, void*); |
050367a3 | 52 | |
0aafb128 MM |
53 | /* The PENDING_TEMPLATES is a TREE_LIST of templates whose |
54 | instantiations have been deferred, either because their definitions | |
d78e771d ZW |
55 | were not yet available, or because we were putting off doing the work. |
56 | The TREE_PURPOSE of each entry is either a DECL (for a function or | |
57 | static data member), or a TYPE (for a class) indicating what we are | |
58 | hoping to instantiate. The TREE_VALUE is not used. */ | |
e2500fed | 59 | static GTY(()) tree pending_templates; |
13e73b29 | 60 | static GTY(()) tree last_pending_template; |
73aad9b9 | 61 | |
67ffc812 | 62 | int processing_template_parmlist; |
386b8a85 JM |
63 | static int template_header_count; |
64 | ||
e2500fed GK |
65 | static GTY(()) tree saved_trees; |
66 | static GTY(()) varray_type inline_parm_levels; | |
3dcaad8b | 67 | static size_t inline_parm_levels_used; |
75650646 | 68 | |
e2500fed | 69 | static GTY(()) tree current_tinst_level; |
3ae18eaf | 70 | |
2b59fc25 KL |
71 | static GTY(()) tree saved_access_scope; |
72 | ||
0fe0caa6 RH |
73 | /* Live only within one (recursive) call to tsubst_expr. We use |
74 | this to pass the statement expression node from the STMT_EXPR | |
75 | to the EXPR_STMT that is its result. */ | |
76 | static tree cur_stmt_expr; | |
77 | ||
6dfbb909 MM |
78 | /* A map from local variable declarations in the body of the template |
79 | presently being instantiated to the corresponding instantiated | |
80 | local variables. */ | |
81 | static htab_t local_specializations; | |
82 | ||
830bfa74 MM |
83 | #define UNIFY_ALLOW_NONE 0 |
84 | #define UNIFY_ALLOW_MORE_CV_QUAL 1 | |
85 | #define UNIFY_ALLOW_LESS_CV_QUAL 2 | |
86 | #define UNIFY_ALLOW_DERIVED 4 | |
161c12b0 | 87 | #define UNIFY_ALLOW_INTEGER 8 |
028d1f20 | 88 | #define UNIFY_ALLOW_OUTER_LEVEL 16 |
62e4a758 NS |
89 | #define UNIFY_ALLOW_OUTER_MORE_CV_QUAL 32 |
90 | #define UNIFY_ALLOW_OUTER_LESS_CV_QUAL 64 | |
830bfa74 | 91 | |
3a978d72 NN |
92 | static void push_access_scope (tree); |
93 | static void pop_access_scope (tree); | |
94 | static int resolve_overloaded_unification (tree, tree, tree, tree, | |
95 | unification_kind_t, int); | |
96 | static int try_one_overload (tree, tree, tree, tree, tree, | |
f23fb7f5 | 97 | unification_kind_t, int, bool); |
3a978d72 NN |
98 | static int unify (tree, tree, tree, tree, int); |
99 | static void add_pending_template (tree); | |
100 | static void reopen_tinst_level (tree); | |
101 | static tree classtype_mangled_name (tree); | |
102 | static char* mangle_class_name_for_template (const char *, tree, tree); | |
103 | static tree tsubst_initializer_list (tree, tree); | |
3a978d72 NN |
104 | static tree get_class_bindings (tree, tree, tree); |
105 | static tree coerce_template_parms (tree, tree, tree, tsubst_flags_t, int); | |
106 | static void tsubst_enum (tree, tree, tree); | |
107 | static tree add_to_template_args (tree, tree); | |
108 | static tree add_outermost_template_args (tree, tree); | |
109 | static bool check_instantiated_args (tree, tree, tsubst_flags_t); | |
c8094d83 | 110 | static int maybe_adjust_types_for_deduction (unification_kind_t, tree*, tree*); |
3a978d72 | 111 | static int type_unification_real (tree, tree, tree, tree, |
30f86ec3 | 112 | int, unification_kind_t, int); |
3a978d72 | 113 | static void note_template_header (int); |
b6ab6892 | 114 | static tree convert_nontype_argument_function (tree, tree); |
3a978d72 NN |
115 | static tree convert_nontype_argument (tree, tree); |
116 | static tree convert_template_argument (tree, tree, tree, | |
117 | tsubst_flags_t, int, tree); | |
0c58f841 MA |
118 | static int for_each_template_parm (tree, tree_fn_t, void*, |
119 | struct pointer_set_t*); | |
3a978d72 NN |
120 | static tree build_template_parm_index (int, int, int, tree, tree); |
121 | static int inline_needs_template_parms (tree); | |
122 | static void push_inline_template_parms_recursive (tree, int); | |
3a978d72 | 123 | static tree retrieve_local_specialization (tree); |
3a978d72 | 124 | static void register_local_specialization (tree, tree); |
3a978d72 | 125 | static tree reduce_template_parm_level (tree, tree, int); |
3a978d72 NN |
126 | static int mark_template_parm (tree, void *); |
127 | static int template_parm_this_level_p (tree, void *); | |
128 | static tree tsubst_friend_function (tree, tree); | |
129 | static tree tsubst_friend_class (tree, tree); | |
130 | static int can_complete_type_without_circularity (tree); | |
a34d3336 | 131 | static tree get_bindings (tree, tree, tree, bool); |
3a978d72 NN |
132 | static int template_decl_level (tree); |
133 | static int check_cv_quals_for_unify (int, tree, tree); | |
a91db711 NS |
134 | static tree tsubst_template_arg (tree, tree, tsubst_flags_t, tree); |
135 | static tree tsubst_template_args (tree, tree, tsubst_flags_t, tree); | |
3a978d72 NN |
136 | static tree tsubst_template_parms (tree, tree, tsubst_flags_t); |
137 | static void regenerate_decl_from_template (tree, tree); | |
138 | static tree most_specialized (tree, tree, tree); | |
139 | static tree most_specialized_class (tree, tree); | |
140 | static int template_class_depth_real (tree, int); | |
141 | static tree tsubst_aggr_type (tree, tree, tsubst_flags_t, tree, int); | |
3a978d72 NN |
142 | static tree tsubst_arg_types (tree, tree, tsubst_flags_t, tree); |
143 | static tree tsubst_function_type (tree, tree, tsubst_flags_t, tree); | |
144 | static void check_specialization_scope (void); | |
145 | static tree process_partial_specialization (tree); | |
146 | static void set_current_access_from_decl (tree); | |
147 | static void check_default_tmpl_args (tree, tree, int, int); | |
148 | static tree tsubst_call_declarator_parms (tree, tree, tsubst_flags_t, tree); | |
3a978d72 NN |
149 | static tree get_template_base (tree, tree, tree, tree); |
150 | static int verify_class_unification (tree, tree, tree); | |
151 | static tree try_class_unification (tree, tree, tree, tree); | |
152 | static int coerce_template_template_parms (tree, tree, tsubst_flags_t, | |
153 | tree, tree); | |
5fe7b654 | 154 | static tree determine_specialization (tree, tree, tree *, int, int); |
3a978d72 NN |
155 | static int template_args_equal (tree, tree); |
156 | static void tsubst_default_arguments (tree); | |
157 | static tree for_each_template_parm_r (tree *, int *, void *); | |
158 | static tree copy_default_args_to_explicit_spec_1 (tree, tree); | |
159 | static void copy_default_args_to_explicit_spec (tree); | |
160 | static int invalid_nontype_parm_type_p (tree, tsubst_flags_t); | |
a723baf1 | 161 | static int eq_local_specializations (const void *, const void *); |
5552b43c | 162 | static bool dependent_type_p_r (tree); |
14d22dd6 MM |
163 | static tree tsubst (tree, tree, tsubst_flags_t, tree); |
164 | static tree tsubst_expr (tree, tree, tsubst_flags_t, tree); | |
165 | static tree tsubst_copy (tree, tree, tsubst_flags_t, tree); | |
36a117a5 | 166 | |
2b59fc25 KL |
167 | /* Make the current scope suitable for access checking when we are |
168 | processing T. T can be FUNCTION_DECL for instantiated function | |
2b907f5c KL |
169 | template, or VAR_DECL for static member variable (need by |
170 | instantiate_decl). */ | |
2b59fc25 | 171 | |
8ce33230 | 172 | static void |
2b907f5c | 173 | push_access_scope (tree t) |
2b59fc25 | 174 | { |
50bc768d NS |
175 | gcc_assert (TREE_CODE (t) == FUNCTION_DECL |
176 | || TREE_CODE (t) == VAR_DECL); | |
2b59fc25 | 177 | |
23ff7e2d KL |
178 | if (DECL_FRIEND_CONTEXT (t)) |
179 | push_nested_class (DECL_FRIEND_CONTEXT (t)); | |
180 | else if (DECL_CLASS_SCOPE_P (t)) | |
2b907f5c | 181 | push_nested_class (DECL_CONTEXT (t)); |
0f399e5f KL |
182 | else |
183 | push_to_top_level (); | |
c8094d83 | 184 | |
2b907f5c | 185 | if (TREE_CODE (t) == FUNCTION_DECL) |
0f399e5f KL |
186 | { |
187 | saved_access_scope = tree_cons | |
188 | (NULL_TREE, current_function_decl, saved_access_scope); | |
189 | current_function_decl = t; | |
190 | } | |
2b59fc25 KL |
191 | } |
192 | ||
2b59fc25 KL |
193 | /* Restore the scope set up by push_access_scope. T is the node we |
194 | are processing. */ | |
195 | ||
8ce33230 | 196 | static void |
3a978d72 | 197 | pop_access_scope (tree t) |
2b59fc25 | 198 | { |
2b907f5c | 199 | if (TREE_CODE (t) == FUNCTION_DECL) |
2b59fc25 KL |
200 | { |
201 | current_function_decl = TREE_VALUE (saved_access_scope); | |
202 | saved_access_scope = TREE_CHAIN (saved_access_scope); | |
203 | } | |
0f399e5f | 204 | |
23ff7e2d | 205 | if (DECL_FRIEND_CONTEXT (t) || DECL_CLASS_SCOPE_P (t)) |
0f399e5f KL |
206 | pop_nested_class (); |
207 | else | |
208 | pop_from_top_level (); | |
2b59fc25 KL |
209 | } |
210 | ||
a723baf1 MM |
211 | /* Do any processing required when DECL (a member template |
212 | declaration) is finished. Returns the TEMPLATE_DECL corresponding | |
213 | to DECL, unless it is a specialization, in which case the DECL | |
214 | itself is returned. */ | |
e1467ff2 MM |
215 | |
216 | tree | |
3a978d72 | 217 | finish_member_template_decl (tree decl) |
e1467ff2 | 218 | { |
a723baf1 MM |
219 | if (decl == error_mark_node) |
220 | return error_mark_node; | |
221 | ||
50bc768d | 222 | gcc_assert (DECL_P (decl)); |
a723baf1 MM |
223 | |
224 | if (TREE_CODE (decl) == TYPE_DECL) | |
93cdc044 | 225 | { |
a723baf1 MM |
226 | tree type; |
227 | ||
228 | type = TREE_TYPE (decl); | |
c8094d83 | 229 | if (IS_AGGR_TYPE (type) |
a723baf1 MM |
230 | && CLASSTYPE_TEMPLATE_INFO (type) |
231 | && !CLASSTYPE_TEMPLATE_SPECIALIZATION (type)) | |
93cdc044 | 232 | { |
a723baf1 | 233 | tree tmpl = CLASSTYPE_TI_TEMPLATE (type); |
93cdc044 JM |
234 | check_member_template (tmpl); |
235 | return tmpl; | |
236 | } | |
8d019cef | 237 | return NULL_TREE; |
93cdc044 | 238 | } |
07c88314 | 239 | else if (TREE_CODE (decl) == FIELD_DECL) |
0f51ccfc | 240 | error ("data member %qD cannot be a member template", decl); |
a1da6cba | 241 | else if (DECL_TEMPLATE_INFO (decl)) |
e1467ff2 | 242 | { |
a1da6cba MM |
243 | if (!DECL_TEMPLATE_SPECIALIZATION (decl)) |
244 | { | |
245 | check_member_template (DECL_TI_TEMPLATE (decl)); | |
246 | return DECL_TI_TEMPLATE (decl); | |
247 | } | |
248 | else | |
249 | return decl; | |
c8094d83 | 250 | } |
a1da6cba | 251 | else |
0f51ccfc | 252 | error ("invalid member template declaration %qD", decl); |
e1467ff2 | 253 | |
a1da6cba | 254 | return error_mark_node; |
f84b4be9 | 255 | } |
e1467ff2 | 256 | |
f84b4be9 | 257 | /* Returns the template nesting level of the indicated class TYPE. |
c8094d83 | 258 | |
f84b4be9 JM |
259 | For example, in: |
260 | template <class T> | |
261 | struct A | |
262 | { | |
263 | template <class U> | |
264 | struct B {}; | |
265 | }; | |
266 | ||
c8094d83 | 267 | A<T>::B<U> has depth two, while A<T> has depth one. |
39c01e4c MM |
268 | Both A<T>::B<int> and A<int>::B<U> have depth one, if |
269 | COUNT_SPECIALIZATIONS is 0 or if they are instantiations, not | |
c8094d83 | 270 | specializations. |
39c01e4c MM |
271 | |
272 | This function is guaranteed to return 0 if passed NULL_TREE so | |
273 | that, for example, `template_class_depth (current_class_type)' is | |
274 | always safe. */ | |
f84b4be9 | 275 | |
c8094d83 | 276 | static int |
3a978d72 | 277 | template_class_depth_real (tree type, int count_specializations) |
f84b4be9 | 278 | { |
93cdc044 | 279 | int depth; |
f84b4be9 | 280 | |
c8094d83 | 281 | for (depth = 0; |
ed44da02 | 282 | type && TREE_CODE (type) != NAMESPACE_DECL; |
c8094d83 | 283 | type = (TREE_CODE (type) == FUNCTION_DECL) |
4f1c5b7d | 284 | ? CP_DECL_CONTEXT (type) : TYPE_CONTEXT (type)) |
ed44da02 MM |
285 | { |
286 | if (TREE_CODE (type) != FUNCTION_DECL) | |
287 | { | |
288 | if (CLASSTYPE_TEMPLATE_INFO (type) | |
289 | && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (type)) | |
290 | && ((count_specializations | |
370af2d5 | 291 | && CLASSTYPE_TEMPLATE_SPECIALIZATION (type)) |
ed44da02 MM |
292 | || uses_template_parms (CLASSTYPE_TI_ARGS (type)))) |
293 | ++depth; | |
294 | } | |
c8094d83 | 295 | else |
ed44da02 MM |
296 | { |
297 | if (DECL_TEMPLATE_INFO (type) | |
298 | && PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (type)) | |
299 | && ((count_specializations | |
300 | && DECL_TEMPLATE_SPECIALIZATION (type)) | |
301 | || uses_template_parms (DECL_TI_ARGS (type)))) | |
302 | ++depth; | |
303 | } | |
304 | } | |
f84b4be9 JM |
305 | |
306 | return depth; | |
e1467ff2 | 307 | } |
98c1c668 | 308 | |
39c01e4c MM |
309 | /* Returns the template nesting level of the indicated class TYPE. |
310 | Like template_class_depth_real, but instantiations do not count in | |
311 | the depth. */ | |
312 | ||
c8094d83 | 313 | int |
3a978d72 | 314 | template_class_depth (tree type) |
39c01e4c MM |
315 | { |
316 | return template_class_depth_real (type, /*count_specializations=*/0); | |
317 | } | |
318 | ||
cae40af6 JM |
319 | /* Returns 1 if processing DECL as part of do_pending_inlines |
320 | needs us to push template parms. */ | |
321 | ||
322 | static int | |
3a978d72 | 323 | inline_needs_template_parms (tree decl) |
cae40af6 JM |
324 | { |
325 | if (! DECL_TEMPLATE_INFO (decl)) | |
326 | return 0; | |
f84b4be9 | 327 | |
36a117a5 | 328 | return (TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (most_general_template (decl))) |
cae40af6 JM |
329 | > (processing_template_decl + DECL_TEMPLATE_SPECIALIZATION (decl))); |
330 | } | |
331 | ||
332 | /* Subroutine of maybe_begin_member_template_processing. | |
333 | Push the template parms in PARMS, starting from LEVELS steps into the | |
334 | chain, and ending at the beginning, since template parms are listed | |
335 | innermost first. */ | |
336 | ||
337 | static void | |
3a978d72 | 338 | push_inline_template_parms_recursive (tree parmlist, int levels) |
cae40af6 JM |
339 | { |
340 | tree parms = TREE_VALUE (parmlist); | |
341 | int i; | |
342 | ||
343 | if (levels > 1) | |
344 | push_inline_template_parms_recursive (TREE_CHAIN (parmlist), levels - 1); | |
786b5245 | 345 | |
98c1c668 | 346 | ++processing_template_decl; |
cae40af6 | 347 | current_template_parms |
4890c2f4 | 348 | = tree_cons (size_int (processing_template_decl), |
98c1c668 | 349 | parms, current_template_parms); |
cae40af6 JM |
350 | TEMPLATE_PARMS_FOR_INLINE (current_template_parms) = 1; |
351 | ||
ac20c67a | 352 | begin_scope (TREE_VEC_LENGTH (parms) ? sk_template_parms : sk_template_spec, |
0cbd7506 | 353 | NULL); |
c8094d83 | 354 | for (i = 0; i < TREE_VEC_LENGTH (parms); ++i) |
98c1c668 | 355 | { |
786b5245 | 356 | tree parm = TREE_VALUE (TREE_VEC_ELT (parms, i)); |
50bc768d | 357 | gcc_assert (DECL_P (parm)); |
cae40af6 | 358 | |
98c1c668 JM |
359 | switch (TREE_CODE (parm)) |
360 | { | |
786b5245 | 361 | case TYPE_DECL: |
73b0fce8 | 362 | case TEMPLATE_DECL: |
98c1c668 JM |
363 | pushdecl (parm); |
364 | break; | |
786b5245 MM |
365 | |
366 | case PARM_DECL: | |
367 | { | |
fc03edb3 MM |
368 | /* Make a CONST_DECL as is done in process_template_parm. |
369 | It is ugly that we recreate this here; the original | |
370 | version built in process_template_parm is no longer | |
371 | available. */ | |
786b5245 MM |
372 | tree decl = build_decl (CONST_DECL, DECL_NAME (parm), |
373 | TREE_TYPE (parm)); | |
c727aa5e | 374 | DECL_ARTIFICIAL (decl) = 1; |
6de9cd9a DN |
375 | TREE_CONSTANT (decl) = 1; |
376 | TREE_INVARIANT (decl) = 1; | |
377 | TREE_READONLY (decl) = 1; | |
786b5245 | 378 | DECL_INITIAL (decl) = DECL_INITIAL (parm); |
cd9f6678 | 379 | SET_DECL_TEMPLATE_PARM_P (decl); |
786b5245 MM |
380 | pushdecl (decl); |
381 | } | |
cae40af6 | 382 | break; |
786b5245 | 383 | |
98c1c668 | 384 | default: |
315fb5db | 385 | gcc_unreachable (); |
98c1c668 JM |
386 | } |
387 | } | |
388 | } | |
389 | ||
cae40af6 JM |
390 | /* Restore the template parameter context for a member template or |
391 | a friend template defined in a class definition. */ | |
392 | ||
393 | void | |
3a978d72 | 394 | maybe_begin_member_template_processing (tree decl) |
cae40af6 JM |
395 | { |
396 | tree parms; | |
3dcaad8b | 397 | int levels = 0; |
cae40af6 | 398 | |
3dcaad8b MM |
399 | if (inline_needs_template_parms (decl)) |
400 | { | |
401 | parms = DECL_TEMPLATE_PARMS (most_general_template (decl)); | |
402 | levels = TMPL_PARMS_DEPTH (parms) - processing_template_decl; | |
cae40af6 | 403 | |
3dcaad8b MM |
404 | if (DECL_TEMPLATE_SPECIALIZATION (decl)) |
405 | { | |
406 | --levels; | |
407 | parms = TREE_CHAIN (parms); | |
408 | } | |
cae40af6 | 409 | |
3dcaad8b | 410 | push_inline_template_parms_recursive (parms, levels); |
cae40af6 JM |
411 | } |
412 | ||
3dcaad8b MM |
413 | /* Remember how many levels of template parameters we pushed so that |
414 | we can pop them later. */ | |
415 | if (!inline_parm_levels) | |
416 | VARRAY_INT_INIT (inline_parm_levels, 4, "inline_parm_levels"); | |
417 | if (inline_parm_levels_used == inline_parm_levels->num_elements) | |
418 | VARRAY_GROW (inline_parm_levels, 2 * inline_parm_levels_used); | |
419 | VARRAY_INT (inline_parm_levels, inline_parm_levels_used) = levels; | |
420 | ++inline_parm_levels_used; | |
cae40af6 JM |
421 | } |
422 | ||
1875c2b7 | 423 | /* Undo the effects of maybe_begin_member_template_processing. */ |
98c1c668 | 424 | |
c8094d83 | 425 | void |
3a978d72 | 426 | maybe_end_member_template_processing (void) |
98c1c668 | 427 | { |
3dcaad8b MM |
428 | int i; |
429 | ||
430 | if (!inline_parm_levels_used) | |
98c1c668 JM |
431 | return; |
432 | ||
3dcaad8b | 433 | --inline_parm_levels_used; |
c8094d83 | 434 | for (i = 0; |
3dcaad8b | 435 | i < VARRAY_INT (inline_parm_levels, inline_parm_levels_used); |
c8094d83 | 436 | ++i) |
cae40af6 JM |
437 | { |
438 | --processing_template_decl; | |
439 | current_template_parms = TREE_CHAIN (current_template_parms); | |
440 | poplevel (0, 0, 0); | |
441 | } | |
98c1c668 JM |
442 | } |
443 | ||
36a117a5 | 444 | /* Return a new template argument vector which contains all of ARGS, |
f9a7ae04 | 445 | but has as its innermost set of arguments the EXTRA_ARGS. */ |
e6f1275f JM |
446 | |
447 | static tree | |
3a978d72 | 448 | add_to_template_args (tree args, tree extra_args) |
e6f1275f | 449 | { |
36a117a5 MM |
450 | tree new_args; |
451 | int extra_depth; | |
452 | int i; | |
453 | int j; | |
e6f1275f | 454 | |
36a117a5 | 455 | extra_depth = TMPL_ARGS_DEPTH (extra_args); |
f31c0a32 | 456 | new_args = make_tree_vec (TMPL_ARGS_DEPTH (args) + extra_depth); |
e6f1275f | 457 | |
36a117a5 MM |
458 | for (i = 1; i <= TMPL_ARGS_DEPTH (args); ++i) |
459 | SET_TMPL_ARGS_LEVEL (new_args, i, TMPL_ARGS_LEVEL (args, i)); | |
e6f1275f | 460 | |
36a117a5 MM |
461 | for (j = 1; j <= extra_depth; ++j, ++i) |
462 | SET_TMPL_ARGS_LEVEL (new_args, i, TMPL_ARGS_LEVEL (extra_args, j)); | |
c8094d83 | 463 | |
e6f1275f JM |
464 | return new_args; |
465 | } | |
466 | ||
36a117a5 MM |
467 | /* Like add_to_template_args, but only the outermost ARGS are added to |
468 | the EXTRA_ARGS. In particular, all but TMPL_ARGS_DEPTH | |
469 | (EXTRA_ARGS) levels are added. This function is used to combine | |
470 | the template arguments from a partial instantiation with the | |
471 | template arguments used to attain the full instantiation from the | |
472 | partial instantiation. */ | |
98c1c668 | 473 | |
4966381a | 474 | static tree |
3a978d72 | 475 | add_outermost_template_args (tree args, tree extra_args) |
98c1c668 JM |
476 | { |
477 | tree new_args; | |
478 | ||
e4a84209 MM |
479 | /* If there are more levels of EXTRA_ARGS than there are ARGS, |
480 | something very fishy is going on. */ | |
50bc768d | 481 | gcc_assert (TMPL_ARGS_DEPTH (args) >= TMPL_ARGS_DEPTH (extra_args)); |
e4a84209 MM |
482 | |
483 | /* If *all* the new arguments will be the EXTRA_ARGS, just return | |
484 | them. */ | |
485 | if (TMPL_ARGS_DEPTH (args) == TMPL_ARGS_DEPTH (extra_args)) | |
486 | return extra_args; | |
487 | ||
36a117a5 MM |
488 | /* For the moment, we make ARGS look like it contains fewer levels. */ |
489 | TREE_VEC_LENGTH (args) -= TMPL_ARGS_DEPTH (extra_args); | |
c8094d83 | 490 | |
36a117a5 | 491 | new_args = add_to_template_args (args, extra_args); |
98c1c668 | 492 | |
36a117a5 MM |
493 | /* Now, we restore ARGS to its full dimensions. */ |
494 | TREE_VEC_LENGTH (args) += TMPL_ARGS_DEPTH (extra_args); | |
98c1c668 JM |
495 | |
496 | return new_args; | |
497 | } | |
5566b478 | 498 | |
f9a7ae04 MM |
499 | /* Return the N levels of innermost template arguments from the ARGS. */ |
500 | ||
501 | tree | |
3a978d72 | 502 | get_innermost_template_args (tree args, int n) |
f9a7ae04 MM |
503 | { |
504 | tree new_args; | |
505 | int extra_levels; | |
506 | int i; | |
507 | ||
50bc768d | 508 | gcc_assert (n >= 0); |
f9a7ae04 MM |
509 | |
510 | /* If N is 1, just return the innermost set of template arguments. */ | |
511 | if (n == 1) | |
512 | return TMPL_ARGS_LEVEL (args, TMPL_ARGS_DEPTH (args)); | |
c8094d83 | 513 | |
f9a7ae04 MM |
514 | /* If we're not removing anything, just return the arguments we were |
515 | given. */ | |
516 | extra_levels = TMPL_ARGS_DEPTH (args) - n; | |
50bc768d | 517 | gcc_assert (extra_levels >= 0); |
f9a7ae04 MM |
518 | if (extra_levels == 0) |
519 | return args; | |
520 | ||
521 | /* Make a new set of arguments, not containing the outer arguments. */ | |
522 | new_args = make_tree_vec (n); | |
523 | for (i = 1; i <= n; ++i) | |
c8094d83 | 524 | SET_TMPL_ARGS_LEVEL (new_args, i, |
f9a7ae04 MM |
525 | TMPL_ARGS_LEVEL (args, i + extra_levels)); |
526 | ||
527 | return new_args; | |
528 | } | |
529 | ||
5566b478 MS |
530 | /* We've got a template header coming up; push to a new level for storing |
531 | the parms. */ | |
8d08fdba | 532 | |
8d08fdba | 533 | void |
3a978d72 | 534 | begin_template_parm_list (void) |
8d08fdba | 535 | { |
6757edfe MM |
536 | /* We use a non-tag-transparent scope here, which causes pushtag to |
537 | put tags in this scope, rather than in the enclosing class or | |
538 | namespace scope. This is the right thing, since we want | |
539 | TEMPLATE_DECLS, and not TYPE_DECLS for template classes. For a | |
540 | global template class, push_template_decl handles putting the | |
541 | TEMPLATE_DECL into top-level scope. For a nested template class, | |
542 | e.g.: | |
543 | ||
544 | template <class T> struct S1 { | |
0cbd7506 | 545 | template <class T> struct S2 {}; |
6757edfe MM |
546 | }; |
547 | ||
548 | pushtag contains special code to call pushdecl_with_scope on the | |
549 | TEMPLATE_DECL for S2. */ | |
ac20c67a | 550 | begin_scope (sk_template_parms, NULL); |
5156628f | 551 | ++processing_template_decl; |
67ffc812 | 552 | ++processing_template_parmlist; |
386b8a85 JM |
553 | note_template_header (0); |
554 | } | |
555 | ||
6c30752f | 556 | /* This routine is called when a specialization is declared. If it is |
0e339752 | 557 | invalid to declare a specialization here, an error is reported. */ |
6c30752f | 558 | |
e9659ab0 | 559 | static void |
3a978d72 | 560 | check_specialization_scope (void) |
6c30752f MM |
561 | { |
562 | tree scope = current_scope (); | |
3ddfb0e6 | 563 | |
c8094d83 MS |
564 | /* [temp.expl.spec] |
565 | ||
6c30752f MM |
566 | An explicit specialization shall be declared in the namespace of |
567 | which the template is a member, or, for member templates, in the | |
568 | namespace of which the enclosing class or enclosing class | |
569 | template is a member. An explicit specialization of a member | |
570 | function, member class or static data member of a class template | |
571 | shall be declared in the namespace of which the class template | |
572 | is a member. */ | |
573 | if (scope && TREE_CODE (scope) != NAMESPACE_DECL) | |
0f51ccfc | 574 | error ("explicit specialization in non-namespace scope %qD", scope); |
3ddfb0e6 | 575 | |
c8094d83 | 576 | /* [temp.expl.spec] |
6c30752f MM |
577 | |
578 | In an explicit specialization declaration for a member of a class | |
579 | template or a member template that appears in namespace scope, | |
580 | the member template and some of its enclosing class templates may | |
581 | remain unspecialized, except that the declaration shall not | |
582 | explicitly specialize a class member template if its enclosing | |
583 | class templates are not explicitly specialized as well. */ | |
c8094d83 | 584 | if (current_template_parms) |
33bd39a2 | 585 | error ("enclosing class templates are not explicitly specialized"); |
6c30752f MM |
586 | } |
587 | ||
c6002625 | 588 | /* We've just seen template <>. */ |
386b8a85 JM |
589 | |
590 | void | |
3a978d72 | 591 | begin_specialization (void) |
386b8a85 | 592 | { |
ac20c67a | 593 | begin_scope (sk_template_spec, NULL); |
386b8a85 | 594 | note_template_header (1); |
6c30752f | 595 | check_specialization_scope (); |
386b8a85 JM |
596 | } |
597 | ||
dc957d14 | 598 | /* Called at then end of processing a declaration preceded by |
386b8a85 JM |
599 | template<>. */ |
600 | ||
c8094d83 | 601 | void |
3a978d72 | 602 | end_specialization (void) |
386b8a85 | 603 | { |
74b846e0 | 604 | finish_scope (); |
386b8a85 JM |
605 | reset_specialization (); |
606 | } | |
607 | ||
386b8a85 | 608 | /* Any template <>'s that we have seen thus far are not referring to a |
c6002625 | 609 | function specialization. */ |
386b8a85 JM |
610 | |
611 | void | |
3a978d72 | 612 | reset_specialization (void) |
386b8a85 JM |
613 | { |
614 | processing_specialization = 0; | |
615 | template_header_count = 0; | |
616 | } | |
617 | ||
838dfd8a | 618 | /* We've just seen a template header. If SPECIALIZATION is nonzero, |
386b8a85 JM |
619 | it was of the form template <>. */ |
620 | ||
c8094d83 | 621 | static void |
3a978d72 | 622 | note_template_header (int specialization) |
386b8a85 JM |
623 | { |
624 | processing_specialization = specialization; | |
625 | template_header_count++; | |
626 | } | |
627 | ||
75650646 | 628 | /* We're beginning an explicit instantiation. */ |
386b8a85 | 629 | |
75650646 | 630 | void |
3a978d72 | 631 | begin_explicit_instantiation (void) |
386b8a85 | 632 | { |
50bc768d | 633 | gcc_assert (!processing_explicit_instantiation); |
a723baf1 | 634 | processing_explicit_instantiation = true; |
75650646 | 635 | } |
386b8a85 | 636 | |
386b8a85 | 637 | |
75650646 | 638 | void |
3a978d72 | 639 | end_explicit_instantiation (void) |
75650646 | 640 | { |
50bc768d | 641 | gcc_assert (processing_explicit_instantiation); |
a723baf1 | 642 | processing_explicit_instantiation = false; |
75650646 | 643 | } |
386b8a85 | 644 | |
13a44ee0 | 645 | /* An explicit specialization or partial specialization TMPL is being |
b1cc95ce MM |
646 | declared. Check that the namespace in which the specialization is |
647 | occurring is permissible. Returns false iff it is invalid to | |
648 | specialize TMPL in the current namespace. */ | |
c8094d83 | 649 | |
b1cc95ce MM |
650 | static bool |
651 | check_specialization_namespace (tree tmpl) | |
652 | { | |
653 | tree tpl_ns = decl_namespace_context (tmpl); | |
654 | ||
655 | /* [tmpl.expl.spec] | |
c8094d83 | 656 | |
b1cc95ce MM |
657 | An explicit specialization shall be declared in the namespace of |
658 | which the template is a member, or, for member templates, in the | |
659 | namespace of which the enclosing class or enclosing class | |
660 | template is a member. An explicit specialization of a member | |
661 | function, member class or static data member of a class template | |
662 | shall be declared in the namespace of which the class template is | |
663 | a member. */ | |
664 | if (is_associated_namespace (current_namespace, tpl_ns)) | |
665 | /* Same or super-using namespace. */ | |
666 | return true; | |
667 | else | |
668 | { | |
0f51ccfc | 669 | pedwarn ("specialization of %qD in different namespace", tmpl); |
dee15844 | 670 | pedwarn (" from definition of %q+#D", tmpl); |
b1cc95ce MM |
671 | return false; |
672 | } | |
673 | } | |
674 | ||
9c12301f MM |
675 | /* SPEC is an explicit instantiation. Check that it is valid to |
676 | perform this explicit instantiation in the current namespace. */ | |
677 | ||
678 | static void | |
679 | check_explicit_instantiation_namespace (tree spec) | |
680 | { | |
681 | tree ns; | |
682 | ||
683 | /* DR 275: An explicit instantiation shall appear in an enclosing | |
684 | namespace of its template. */ | |
685 | ns = decl_namespace_context (spec); | |
686 | if (!is_ancestor (current_namespace, ns)) | |
687 | pedwarn ("explicit instantiation of %qD in namespace %qD " | |
312ea236 | 688 | "(which does not enclose namespace %qD)", |
9c12301f MM |
689 | spec, current_namespace, ns); |
690 | } | |
691 | ||
36a117a5 MM |
692 | /* The TYPE is being declared. If it is a template type, that means it |
693 | is a partial specialization. Do appropriate error-checking. */ | |
694 | ||
c8094d83 | 695 | void |
3a978d72 | 696 | maybe_process_partial_specialization (tree type) |
36a117a5 | 697 | { |
6e049fcd KL |
698 | /* TYPE maybe an ERROR_MARK_NODE. */ |
699 | tree context = TYPE_P (type) ? TYPE_CONTEXT (type) : NULL_TREE; | |
700 | ||
a723baf1 | 701 | if (CLASS_TYPE_P (type) && CLASSTYPE_USE_TEMPLATE (type)) |
36a117a5 | 702 | { |
6e049fcd KL |
703 | /* This is for ordinary explicit specialization and partial |
704 | specialization of a template class such as: | |
705 | ||
706 | template <> class C<int>; | |
707 | ||
708 | or: | |
709 | ||
710 | template <class T> class C<T*>; | |
711 | ||
712 | Make sure that `C<int>' and `C<T*>' are implicit instantiations. */ | |
713 | ||
36a117a5 | 714 | if (CLASSTYPE_IMPLICIT_INSTANTIATION (type) |
d0f062fb | 715 | && !COMPLETE_TYPE_P (type)) |
36a117a5 | 716 | { |
b1cc95ce | 717 | check_specialization_namespace (CLASSTYPE_TI_TEMPLATE (type)); |
370af2d5 | 718 | SET_CLASSTYPE_TEMPLATE_SPECIALIZATION (type); |
36a117a5 MM |
719 | if (processing_template_decl) |
720 | push_template_decl (TYPE_MAIN_DECL (type)); | |
721 | } | |
722 | else if (CLASSTYPE_TEMPLATE_INSTANTIATION (type)) | |
0f51ccfc | 723 | error ("specialization of %qT after instantiation", type); |
36a117a5 | 724 | } |
6e049fcd KL |
725 | else if (CLASS_TYPE_P (type) |
726 | && !CLASSTYPE_USE_TEMPLATE (type) | |
727 | && CLASSTYPE_TEMPLATE_INFO (type) | |
728 | && context && CLASS_TYPE_P (context) | |
729 | && CLASSTYPE_TEMPLATE_INFO (context)) | |
730 | { | |
731 | /* This is for an explicit specialization of member class | |
732 | template according to [temp.expl.spec/18]: | |
733 | ||
734 | template <> template <class U> class C<int>::D; | |
735 | ||
736 | The context `C<int>' must be an implicit instantiation. | |
737 | Otherwise this is just a member class template declared | |
738 | earlier like: | |
739 | ||
740 | template <> class C<int> { template <class U> class D; }; | |
741 | template <> template <class U> class C<int>::D; | |
742 | ||
743 | In the first case, `C<int>::D' is a specialization of `C<T>::D' | |
744 | while in the second case, `C<int>::D' is a primary template | |
745 | and `C<T>::D' may not exist. */ | |
746 | ||
747 | if (CLASSTYPE_IMPLICIT_INSTANTIATION (context) | |
748 | && !COMPLETE_TYPE_P (type)) | |
749 | { | |
750 | tree t; | |
751 | ||
752 | if (current_namespace | |
753 | != decl_namespace_context (CLASSTYPE_TI_TEMPLATE (type))) | |
754 | { | |
0f51ccfc | 755 | pedwarn ("specializing %q#T in different namespace", type); |
dee15844 JM |
756 | pedwarn (" from definition of %q+#D", |
757 | CLASSTYPE_TI_TEMPLATE (type)); | |
6e049fcd KL |
758 | } |
759 | ||
760 | /* Check for invalid specialization after instantiation: | |
761 | ||
762 | template <> template <> class C<int>::D<int>; | |
763 | template <> template <class U> class C<int>::D; */ | |
764 | ||
765 | for (t = DECL_TEMPLATE_INSTANTIATIONS | |
766 | (most_general_template (CLASSTYPE_TI_TEMPLATE (type))); | |
767 | t; t = TREE_CHAIN (t)) | |
768 | if (TREE_VALUE (t) != type | |
769 | && TYPE_CONTEXT (TREE_VALUE (t)) == context) | |
0f51ccfc | 770 | error ("specialization %qT after instantiation %qT", |
6e049fcd KL |
771 | type, TREE_VALUE (t)); |
772 | ||
773 | /* Mark TYPE as a specialization. And as a result, we only | |
774 | have one level of template argument for the innermost | |
775 | class template. */ | |
776 | SET_CLASSTYPE_TEMPLATE_SPECIALIZATION (type); | |
777 | CLASSTYPE_TI_ARGS (type) | |
778 | = INNERMOST_TEMPLATE_ARGS (CLASSTYPE_TI_ARGS (type)); | |
779 | } | |
780 | } | |
20496fa2 | 781 | else if (processing_specialization) |
0f51ccfc | 782 | error ("explicit specialization of non-template %qT", type); |
36a117a5 MM |
783 | } |
784 | ||
ee81147e | 785 | /* Returns nonzero if we can optimize the retrieval of specializations |
c7222c02 MM |
786 | for TMPL, a TEMPLATE_DECL. In particular, for such a template, we |
787 | do not use DECL_TEMPLATE_SPECIALIZATIONS at all. */ | |
788 | ||
c8094d83 | 789 | static inline bool |
c7222c02 MM |
790 | optimize_specialization_lookup_p (tree tmpl) |
791 | { | |
792 | return (DECL_FUNCTION_TEMPLATE_P (tmpl) | |
793 | && DECL_CLASS_SCOPE_P (tmpl) | |
794 | /* DECL_CLASS_SCOPE_P holds of T::f even if T is a template | |
795 | parameter. */ | |
796 | && CLASS_TYPE_P (DECL_CONTEXT (tmpl)) | |
1ca939e5 MM |
797 | /* The optimized lookup depends on the fact that the |
798 | template arguments for the member function template apply | |
799 | purely to the containing class, which is not true if the | |
800 | containing class is an explicit or partial | |
801 | specialization. */ | |
802 | && !CLASSTYPE_TEMPLATE_SPECIALIZATION (DECL_CONTEXT (tmpl)) | |
c7222c02 MM |
803 | && !DECL_MEMBER_TEMPLATE_P (tmpl) |
804 | && !DECL_CONV_FN_P (tmpl) | |
805 | /* It is possible to have a template that is not a member | |
806 | template and is not a member of a template class: | |
c8094d83 MS |
807 | |
808 | template <typename T> | |
c7222c02 | 809 | struct S { friend A::f(); }; |
c8094d83 | 810 | |
c7222c02 MM |
811 | Here, the friend function is a template, but the context does |
812 | not have template information. The optimized lookup relies | |
813 | on having ARGS be the template arguments for both the class | |
814 | and the function template. */ | |
815 | && !DECL_FRIEND_P (DECL_TEMPLATE_RESULT (tmpl))); | |
816 | } | |
817 | ||
75650646 MM |
818 | /* Retrieve the specialization (in the sense of [temp.spec] - a |
819 | specialization is either an instantiation or an explicit | |
820 | specialization) of TMPL for the given template ARGS. If there is | |
821 | no such specialization, return NULL_TREE. The ARGS are a vector of | |
822 | arguments, or a vector of vectors of arguments, in the case of | |
c8094d83 | 823 | templates with more than one level of parameters. |
c7222c02 MM |
824 | |
825 | If TMPL is a type template and CLASS_SPECIALIZATIONS_P is true, | |
826 | then we search for a partial specialization matching ARGS. This | |
827 | parameter is ignored if TMPL is not a class template. */ | |
c8094d83 | 828 | |
75650646 | 829 | static tree |
c8094d83 | 830 | retrieve_specialization (tree tmpl, tree args, |
c7222c02 | 831 | bool class_specializations_p) |
75650646 | 832 | { |
50bc768d | 833 | gcc_assert (TREE_CODE (tmpl) == TEMPLATE_DECL); |
75650646 | 834 | |
36a117a5 MM |
835 | /* There should be as many levels of arguments as there are |
836 | levels of parameters. */ | |
c8094d83 | 837 | gcc_assert (TMPL_ARGS_DEPTH (args) |
50bc768d | 838 | == TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (tmpl))); |
c8094d83 | 839 | |
c7222c02 MM |
840 | if (optimize_specialization_lookup_p (tmpl)) |
841 | { | |
842 | tree class_template; | |
843 | tree class_specialization; | |
d4e6fecb | 844 | VEC(tree,gc) *methods; |
c7222c02 MM |
845 | tree fns; |
846 | int idx; | |
847 | ||
848 | /* The template arguments actually apply to the containing | |
849 | class. Find the class specialization with those | |
850 | arguments. */ | |
851 | class_template = CLASSTYPE_TI_TEMPLATE (DECL_CONTEXT (tmpl)); | |
c8094d83 | 852 | class_specialization |
c7222c02 MM |
853 | = retrieve_specialization (class_template, args, |
854 | /*class_specializations_p=*/false); | |
855 | if (!class_specialization) | |
856 | return NULL_TREE; | |
857 | /* Now, find the appropriate entry in the CLASSTYPE_METHOD_VEC | |
858 | for the specialization. */ | |
859 | idx = class_method_index_for_fn (class_specialization, tmpl); | |
860 | if (idx == -1) | |
861 | return NULL_TREE; | |
862 | /* Iterate through the methods with the indicated name, looking | |
863 | for the one that has an instance of TMPL. */ | |
864 | methods = CLASSTYPE_METHOD_VEC (class_specialization); | |
865 | for (fns = VEC_index (tree, methods, idx); fns; fns = OVL_NEXT (fns)) | |
866 | { | |
867 | tree fn = OVL_CURRENT (fns); | |
868 | if (DECL_TEMPLATE_INFO (fn) && DECL_TI_TEMPLATE (fn) == tmpl) | |
869 | return fn; | |
870 | } | |
871 | return NULL_TREE; | |
872 | } | |
873 | else | |
874 | { | |
875 | tree *sp; | |
876 | tree *head; | |
877 | ||
878 | /* Class templates store their instantiations on the | |
879 | DECL_TEMPLATE_INSTANTIATIONS list; other templates use the | |
880 | DECL_TEMPLATE_SPECIALIZATIONS list. */ | |
881 | if (!class_specializations_p | |
882 | && TREE_CODE (DECL_TEMPLATE_RESULT (tmpl)) == TYPE_DECL) | |
883 | sp = &DECL_TEMPLATE_INSTANTIATIONS (tmpl); | |
884 | else | |
885 | sp = &DECL_TEMPLATE_SPECIALIZATIONS (tmpl); | |
886 | head = sp; | |
887 | /* Iterate through the list until we find a matching template. */ | |
888 | while (*sp != NULL_TREE) | |
889 | { | |
890 | tree spec = *sp; | |
c8094d83 | 891 | |
c7222c02 MM |
892 | if (comp_template_args (TREE_PURPOSE (spec), args)) |
893 | { | |
894 | /* Use the move-to-front heuristic to speed up future | |
c8094d83 | 895 | searches. */ |
c7222c02 MM |
896 | if (spec != *head) |
897 | { | |
898 | *sp = TREE_CHAIN (*sp); | |
899 | TREE_CHAIN (spec) = *head; | |
900 | *head = spec; | |
901 | } | |
902 | return TREE_VALUE (spec); | |
903 | } | |
904 | sp = &TREE_CHAIN (spec); | |
905 | } | |
906 | } | |
75650646 MM |
907 | |
908 | return NULL_TREE; | |
386b8a85 JM |
909 | } |
910 | ||
dc957d14 | 911 | /* Like retrieve_specialization, but for local declarations. */ |
9188c363 MM |
912 | |
913 | static tree | |
3a978d72 | 914 | retrieve_local_specialization (tree tmpl) |
9188c363 | 915 | { |
c68b0a84 KG |
916 | tree spec = htab_find_with_hash (local_specializations, tmpl, |
917 | htab_hash_pointer (tmpl)); | |
a723baf1 | 918 | return spec ? TREE_PURPOSE (spec) : NULL_TREE; |
9188c363 MM |
919 | } |
920 | ||
838dfd8a | 921 | /* Returns nonzero iff DECL is a specialization of TMPL. */ |
6757edfe MM |
922 | |
923 | int | |
3a978d72 | 924 | is_specialization_of (tree decl, tree tmpl) |
6757edfe MM |
925 | { |
926 | tree t; | |
927 | ||
928 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
929 | { | |
c8094d83 | 930 | for (t = decl; |
6757edfe MM |
931 | t != NULL_TREE; |
932 | t = DECL_TEMPLATE_INFO (t) ? DECL_TI_TEMPLATE (t) : NULL_TREE) | |
933 | if (t == tmpl) | |
934 | return 1; | |
935 | } | |
c8094d83 | 936 | else |
6757edfe | 937 | { |
50bc768d | 938 | gcc_assert (TREE_CODE (decl) == TYPE_DECL); |
6757edfe MM |
939 | |
940 | for (t = TREE_TYPE (decl); | |
941 | t != NULL_TREE; | |
942 | t = CLASSTYPE_USE_TEMPLATE (t) | |
943 | ? TREE_TYPE (CLASSTYPE_TI_TEMPLATE (t)) : NULL_TREE) | |
9edc3913 | 944 | if (same_type_ignoring_top_level_qualifiers_p (t, TREE_TYPE (tmpl))) |
6757edfe | 945 | return 1; |
c8094d83 | 946 | } |
386b8a85 | 947 | |
6757edfe MM |
948 | return 0; |
949 | } | |
75650646 | 950 | |
d43f603d KL |
951 | /* Returns nonzero iff DECL is a specialization of friend declaration |
952 | FRIEND according to [temp.friend]. */ | |
953 | ||
954 | bool | |
955 | is_specialization_of_friend (tree decl, tree friend) | |
956 | { | |
957 | bool need_template = true; | |
958 | int template_depth; | |
959 | ||
b939a023 KL |
960 | gcc_assert (TREE_CODE (decl) == FUNCTION_DECL |
961 | || TREE_CODE (decl) == TYPE_DECL); | |
d43f603d KL |
962 | |
963 | /* For [temp.friend/6] when FRIEND is an ordinary member function | |
964 | of a template class, we want to check if DECL is a specialization | |
965 | if this. */ | |
966 | if (TREE_CODE (friend) == FUNCTION_DECL | |
967 | && DECL_TEMPLATE_INFO (friend) | |
968 | && !DECL_USE_TEMPLATE (friend)) | |
969 | { | |
b939a023 | 970 | /* We want a TEMPLATE_DECL for `is_specialization_of'. */ |
d43f603d KL |
971 | friend = DECL_TI_TEMPLATE (friend); |
972 | need_template = false; | |
973 | } | |
b939a023 KL |
974 | else if (TREE_CODE (friend) == TEMPLATE_DECL |
975 | && !PRIMARY_TEMPLATE_P (friend)) | |
976 | need_template = false; | |
d43f603d KL |
977 | |
978 | /* There is nothing to do if this is not a template friend. */ | |
979 | if (TREE_CODE (friend) != TEMPLATE_DECL) | |
b939a023 | 980 | return false; |
d43f603d KL |
981 | |
982 | if (is_specialization_of (decl, friend)) | |
b939a023 | 983 | return true; |
d43f603d KL |
984 | |
985 | /* [temp.friend/6] | |
986 | A member of a class template may be declared to be a friend of a | |
987 | non-template class. In this case, the corresponding member of | |
988 | every specialization of the class template is a friend of the | |
989 | class granting friendship. | |
c8094d83 | 990 | |
d43f603d KL |
991 | For example, given a template friend declaration |
992 | ||
993 | template <class T> friend void A<T>::f(); | |
994 | ||
995 | the member function below is considered a friend | |
996 | ||
997 | template <> struct A<int> { | |
998 | void f(); | |
999 | }; | |
1000 | ||
1001 | For this type of template friend, TEMPLATE_DEPTH below will be | |
5c425df5 | 1002 | nonzero. To determine if DECL is a friend of FRIEND, we first |
d43f603d KL |
1003 | check if the enclosing class is a specialization of another. */ |
1004 | ||
1005 | template_depth = template_class_depth (DECL_CONTEXT (friend)); | |
1006 | if (template_depth | |
1007 | && DECL_CLASS_SCOPE_P (decl) | |
c8094d83 | 1008 | && is_specialization_of (TYPE_NAME (DECL_CONTEXT (decl)), |
d43f603d KL |
1009 | CLASSTYPE_TI_TEMPLATE (DECL_CONTEXT (friend)))) |
1010 | { | |
1011 | /* Next, we check the members themselves. In order to handle | |
b939a023 | 1012 | a few tricky cases, such as when FRIEND's are |
d43f603d KL |
1013 | |
1014 | template <class T> friend void A<T>::g(T t); | |
1015 | template <class T> template <T t> friend void A<T>::h(); | |
1016 | ||
b939a023 KL |
1017 | and DECL's are |
1018 | ||
1019 | void A<int>::g(int); | |
1020 | template <int> void A<int>::h(); | |
1021 | ||
1022 | we need to figure out ARGS, the template arguments from | |
1023 | the context of DECL. This is required for template substitution | |
1024 | of `T' in the function parameter of `g' and template parameter | |
1025 | of `h' in the above examples. Here ARGS corresponds to `int'. */ | |
d43f603d KL |
1026 | |
1027 | tree context = DECL_CONTEXT (decl); | |
1028 | tree args = NULL_TREE; | |
1029 | int current_depth = 0; | |
b939a023 | 1030 | |
d43f603d KL |
1031 | while (current_depth < template_depth) |
1032 | { | |
1033 | if (CLASSTYPE_TEMPLATE_INFO (context)) | |
1034 | { | |
1035 | if (current_depth == 0) | |
1036 | args = TYPE_TI_ARGS (context); | |
1037 | else | |
1038 | args = add_to_template_args (TYPE_TI_ARGS (context), args); | |
1039 | current_depth++; | |
1040 | } | |
1041 | context = TYPE_CONTEXT (context); | |
1042 | } | |
1043 | ||
1044 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
1045 | { | |
1046 | bool is_template; | |
1047 | tree friend_type; | |
1048 | tree decl_type; | |
1049 | tree friend_args_type; | |
1050 | tree decl_args_type; | |
1051 | ||
1052 | /* Make sure that both DECL and FRIEND are templates or | |
1053 | non-templates. */ | |
1054 | is_template = DECL_TEMPLATE_INFO (decl) | |
1055 | && PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl)); | |
1056 | if (need_template ^ is_template) | |
b939a023 | 1057 | return false; |
d43f603d KL |
1058 | else if (is_template) |
1059 | { | |
da1d7781 | 1060 | /* If both are templates, check template parameter list. */ |
d43f603d KL |
1061 | tree friend_parms |
1062 | = tsubst_template_parms (DECL_TEMPLATE_PARMS (friend), | |
1063 | args, tf_none); | |
1064 | if (!comp_template_parms | |
1065 | (DECL_TEMPLATE_PARMS (DECL_TI_TEMPLATE (decl)), | |
1066 | friend_parms)) | |
b939a023 | 1067 | return false; |
d43f603d KL |
1068 | |
1069 | decl_type = TREE_TYPE (DECL_TI_TEMPLATE (decl)); | |
1070 | } | |
1071 | else | |
1072 | decl_type = TREE_TYPE (decl); | |
1073 | ||
1074 | friend_type = tsubst_function_type (TREE_TYPE (friend), args, | |
1075 | tf_none, NULL_TREE); | |
1076 | if (friend_type == error_mark_node) | |
b939a023 | 1077 | return false; |
d43f603d KL |
1078 | |
1079 | /* Check if return types match. */ | |
1080 | if (!same_type_p (TREE_TYPE (decl_type), TREE_TYPE (friend_type))) | |
b939a023 | 1081 | return false; |
d43f603d KL |
1082 | |
1083 | /* Check if function parameter types match, ignoring the | |
1084 | `this' parameter. */ | |
1085 | friend_args_type = TYPE_ARG_TYPES (friend_type); | |
1086 | decl_args_type = TYPE_ARG_TYPES (decl_type); | |
1087 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (friend)) | |
1088 | friend_args_type = TREE_CHAIN (friend_args_type); | |
1089 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)) | |
1090 | decl_args_type = TREE_CHAIN (decl_args_type); | |
b939a023 KL |
1091 | |
1092 | return compparms (decl_args_type, friend_args_type); | |
1093 | } | |
1094 | else | |
1095 | { | |
1096 | /* DECL is a TYPE_DECL */ | |
1097 | bool is_template; | |
1098 | tree decl_type = TREE_TYPE (decl); | |
1099 | ||
1100 | /* Make sure that both DECL and FRIEND are templates or | |
1101 | non-templates. */ | |
1102 | is_template | |
1103 | = CLASSTYPE_TEMPLATE_INFO (decl_type) | |
1104 | && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (decl_type)); | |
1105 | ||
1106 | if (need_template ^ is_template) | |
1107 | return false; | |
1108 | else if (is_template) | |
1109 | { | |
1110 | tree friend_parms; | |
1111 | /* If both are templates, check the name of the two | |
1112 | TEMPLATE_DECL's first because is_friend didn't. */ | |
1113 | if (DECL_NAME (CLASSTYPE_TI_TEMPLATE (decl_type)) | |
1114 | != DECL_NAME (friend)) | |
1115 | return false; | |
1116 | ||
1117 | /* Now check template parameter list. */ | |
1118 | friend_parms | |
1119 | = tsubst_template_parms (DECL_TEMPLATE_PARMS (friend), | |
1120 | args, tf_none); | |
1121 | return comp_template_parms | |
1122 | (DECL_TEMPLATE_PARMS (CLASSTYPE_TI_TEMPLATE (decl_type)), | |
1123 | friend_parms); | |
1124 | } | |
1125 | else | |
1126 | return (DECL_NAME (decl) | |
1127 | == DECL_NAME (friend)); | |
d43f603d KL |
1128 | } |
1129 | } | |
b939a023 | 1130 | return false; |
d43f603d KL |
1131 | } |
1132 | ||
75650646 | 1133 | /* Register the specialization SPEC as a specialization of TMPL with |
d63d5d0c ILT |
1134 | the indicated ARGS. IS_FRIEND indicates whether the specialization |
1135 | is actually just a friend declaration. Returns SPEC, or an | |
1136 | equivalent prior declaration, if available. */ | |
75650646 | 1137 | |
36a117a5 | 1138 | static tree |
d63d5d0c | 1139 | register_specialization (tree spec, tree tmpl, tree args, bool is_friend) |
75650646 | 1140 | { |
c7222c02 | 1141 | tree fn; |
75650646 | 1142 | |
50bc768d | 1143 | gcc_assert (TREE_CODE (tmpl) == TEMPLATE_DECL); |
75650646 | 1144 | |
c8094d83 | 1145 | if (TREE_CODE (spec) == FUNCTION_DECL |
36a117a5 MM |
1146 | && uses_template_parms (DECL_TI_ARGS (spec))) |
1147 | /* This is the FUNCTION_DECL for a partial instantiation. Don't | |
1148 | register it; we want the corresponding TEMPLATE_DECL instead. | |
1149 | We use `uses_template_parms (DECL_TI_ARGS (spec))' rather than | |
1150 | the more obvious `uses_template_parms (spec)' to avoid problems | |
1151 | with default function arguments. In particular, given | |
1152 | something like this: | |
1153 | ||
0cbd7506 | 1154 | template <class T> void f(T t1, T t = T()) |
36a117a5 MM |
1155 | |
1156 | the default argument expression is not substituted for in an | |
1157 | instantiation unless and until it is actually needed. */ | |
1158 | return spec; | |
28ba38e3 | 1159 | |
c8094d83 | 1160 | fn = retrieve_specialization (tmpl, args, |
c7222c02 MM |
1161 | /*class_specializations_p=*/false); |
1162 | /* We can sometimes try to re-register a specialization that we've | |
1163 | already got. In particular, regenerate_decl_from_template calls | |
1164 | duplicate_decls which will update the specialization list. But, | |
1165 | we'll still get called again here anyhow. It's more convenient | |
1166 | to simply allow this than to try to prevent it. */ | |
1167 | if (fn == spec) | |
1168 | return spec; | |
1169 | else if (fn && DECL_TEMPLATE_SPECIALIZATION (spec)) | |
22e9174f | 1170 | { |
c7222c02 | 1171 | if (DECL_TEMPLATE_INSTANTIATION (fn)) |
22e9174f | 1172 | { |
c8094d83 | 1173 | if (TREE_USED (fn) |
c7222c02 | 1174 | || DECL_EXPLICIT_INSTANTIATION (fn)) |
22e9174f | 1175 | { |
c7222c02 MM |
1176 | error ("specialization of %qD after instantiation", |
1177 | fn); | |
1178 | return spec; | |
22e9174f | 1179 | } |
c7222c02 | 1180 | else |
b1cc95ce | 1181 | { |
c7222c02 MM |
1182 | /* This situation should occur only if the first |
1183 | specialization is an implicit instantiation, the | |
1184 | second is an explicit specialization, and the | |
1185 | implicit instantiation has not yet been used. That | |
1186 | situation can occur if we have implicitly | |
1187 | instantiated a member function and then specialized | |
1188 | it later. | |
c8094d83 | 1189 | |
c7222c02 MM |
1190 | We can also wind up here if a friend declaration that |
1191 | looked like an instantiation turns out to be a | |
1192 | specialization: | |
c8094d83 | 1193 | |
c7222c02 MM |
1194 | template <class T> void foo(T); |
1195 | class S { friend void foo<>(int) }; | |
c8094d83 MS |
1196 | template <> void foo(int); |
1197 | ||
c7222c02 MM |
1198 | We transform the existing DECL in place so that any |
1199 | pointers to it become pointers to the updated | |
1200 | declaration. | |
1201 | ||
1202 | If there was a definition for the template, but not | |
1203 | for the specialization, we want this to look as if | |
1204 | there were no definition, and vice versa. */ | |
1205 | DECL_INITIAL (fn) = NULL_TREE; | |
d63d5d0c | 1206 | duplicate_decls (spec, fn, is_friend); |
9c12301f | 1207 | check_specialization_namespace (fn); |
c8094d83 | 1208 | |
b1cc95ce MM |
1209 | return fn; |
1210 | } | |
22e9174f | 1211 | } |
c7222c02 MM |
1212 | else if (DECL_TEMPLATE_SPECIALIZATION (fn)) |
1213 | { | |
d63d5d0c | 1214 | if (!duplicate_decls (spec, fn, is_friend) && DECL_INITIAL (spec)) |
c7222c02 MM |
1215 | /* Dup decl failed, but this is a new definition. Set the |
1216 | line number so any errors match this new | |
1217 | definition. */ | |
1218 | DECL_SOURCE_LOCATION (fn) = DECL_SOURCE_LOCATION (spec); | |
c8094d83 | 1219 | |
c7222c02 MM |
1220 | return fn; |
1221 | } | |
b1cc95ce MM |
1222 | } |
1223 | ||
1224 | /* A specialization must be declared in the same namespace as the | |
1225 | template it is specializing. */ | |
1226 | if (DECL_TEMPLATE_SPECIALIZATION (spec) | |
1227 | && !check_specialization_namespace (tmpl)) | |
1228 | DECL_CONTEXT (spec) = decl_namespace_context (tmpl); | |
75650646 | 1229 | |
c7222c02 MM |
1230 | if (!optimize_specialization_lookup_p (tmpl)) |
1231 | DECL_TEMPLATE_SPECIALIZATIONS (tmpl) | |
1232 | = tree_cons (args, spec, DECL_TEMPLATE_SPECIALIZATIONS (tmpl)); | |
36a117a5 MM |
1233 | |
1234 | return spec; | |
1235 | } | |
1236 | ||
1237 | /* Unregister the specialization SPEC as a specialization of TMPL. | |
b3445994 MM |
1238 | Replace it with NEW_SPEC, if NEW_SPEC is non-NULL. Returns true |
1239 | if the SPEC was listed as a specialization of TMPL. */ | |
36a117a5 | 1240 | |
b3445994 MM |
1241 | bool |
1242 | reregister_specialization (tree spec, tree tmpl, tree new_spec) | |
36a117a5 MM |
1243 | { |
1244 | tree* s; | |
1245 | ||
1246 | for (s = &DECL_TEMPLATE_SPECIALIZATIONS (tmpl); | |
1247 | *s != NULL_TREE; | |
1248 | s = &TREE_CHAIN (*s)) | |
1249 | if (TREE_VALUE (*s) == spec) | |
1250 | { | |
b3445994 MM |
1251 | if (!new_spec) |
1252 | *s = TREE_CHAIN (*s); | |
1253 | else | |
a3d87771 | 1254 | TREE_VALUE (*s) = new_spec; |
36a117a5 MM |
1255 | return 1; |
1256 | } | |
1257 | ||
1258 | return 0; | |
75650646 MM |
1259 | } |
1260 | ||
a723baf1 MM |
1261 | /* Compare an entry in the local specializations hash table P1 (which |
1262 | is really a pointer to a TREE_LIST) with P2 (which is really a | |
1263 | DECL). */ | |
1264 | ||
1265 | static int | |
1266 | eq_local_specializations (const void *p1, const void *p2) | |
1267 | { | |
1268 | return TREE_VALUE ((tree) p1) == (tree) p2; | |
1269 | } | |
1270 | ||
69f794a7 MM |
1271 | /* Hash P1, an entry in the local specializations table. */ |
1272 | ||
1273 | static hashval_t | |
1274 | hash_local_specialization (const void* p1) | |
1275 | { | |
1276 | return htab_hash_pointer (TREE_VALUE ((tree) p1)); | |
1277 | } | |
1278 | ||
6dfbb909 MM |
1279 | /* Like register_specialization, but for local declarations. We are |
1280 | registering SPEC, an instantiation of TMPL. */ | |
9188c363 | 1281 | |
414ea4aa | 1282 | static void |
3a978d72 | 1283 | register_local_specialization (tree spec, tree tmpl) |
9188c363 | 1284 | { |
6dfbb909 MM |
1285 | void **slot; |
1286 | ||
c8094d83 | 1287 | slot = htab_find_slot_with_hash (local_specializations, tmpl, |
69f794a7 | 1288 | htab_hash_pointer (tmpl), INSERT); |
a723baf1 | 1289 | *slot = build_tree_list (spec, tmpl); |
9188c363 MM |
1290 | } |
1291 | ||
e1467ff2 MM |
1292 | /* Print the list of candidate FNS in an error message. */ |
1293 | ||
104bf76a | 1294 | void |
3a978d72 | 1295 | print_candidates (tree fns) |
e1467ff2 MM |
1296 | { |
1297 | tree fn; | |
1298 | ||
d8e178a0 | 1299 | const char *str = "candidates are:"; |
e1467ff2 MM |
1300 | |
1301 | for (fn = fns; fn != NULL_TREE; fn = TREE_CHAIN (fn)) | |
1302 | { | |
d6479fe7 MM |
1303 | tree f; |
1304 | ||
1305 | for (f = TREE_VALUE (fn); f; f = OVL_NEXT (f)) | |
dee15844 | 1306 | error ("%s %+#D", str, OVL_CURRENT (f)); |
e1467ff2 MM |
1307 | str = " "; |
1308 | } | |
1309 | } | |
1310 | ||
75650646 | 1311 | /* Returns the template (one of the functions given by TEMPLATE_ID) |
e1467ff2 | 1312 | which can be specialized to match the indicated DECL with the |
03017874 MM |
1313 | explicit template args given in TEMPLATE_ID. The DECL may be |
1314 | NULL_TREE if none is available. In that case, the functions in | |
1315 | TEMPLATE_ID are non-members. | |
1316 | ||
838dfd8a | 1317 | If NEED_MEMBER_TEMPLATE is nonzero the function is known to be a |
03017874 MM |
1318 | specialization of a member template. |
1319 | ||
5fe7b654 GB |
1320 | The TEMPLATE_COUNT is the number of references to qualifying |
1321 | template classes that appeared in the name of the function. See | |
1322 | check_explicit_specialization for a more accurate description. | |
1323 | ||
03017874 MM |
1324 | The template args (those explicitly specified and those deduced) |
1325 | are output in a newly created vector *TARGS_OUT. | |
1326 | ||
1327 | If it is impossible to determine the result, an error message is | |
bf8f3f93 | 1328 | issued. The error_mark_node is returned to indicate failure. */ |
75650646 | 1329 | |
e9659ab0 | 1330 | static tree |
c8094d83 | 1331 | determine_specialization (tree template_id, |
0cbd7506 MS |
1332 | tree decl, |
1333 | tree* targs_out, | |
5fe7b654 GB |
1334 | int need_member_template, |
1335 | int template_count) | |
386b8a85 | 1336 | { |
03017874 MM |
1337 | tree fns; |
1338 | tree targs; | |
1339 | tree explicit_targs; | |
1340 | tree candidates = NULL_TREE; | |
1341 | tree templates = NULL_TREE; | |
5fe7b654 GB |
1342 | int header_count; |
1343 | struct cp_binding_level *b; | |
386b8a85 | 1344 | |
e1467ff2 MM |
1345 | *targs_out = NULL_TREE; |
1346 | ||
f2e48b67 BK |
1347 | if (template_id == error_mark_node) |
1348 | return error_mark_node; | |
1349 | ||
1350 | fns = TREE_OPERAND (template_id, 0); | |
03017874 | 1351 | explicit_targs = TREE_OPERAND (template_id, 1); |
f2e48b67 | 1352 | |
27fafc8d JM |
1353 | if (fns == error_mark_node) |
1354 | return error_mark_node; | |
1355 | ||
c6002625 | 1356 | /* Check for baselinks. */ |
91e490ab | 1357 | if (BASELINK_P (fns)) |
da15dae6 | 1358 | fns = BASELINK_FUNCTIONS (fns); |
386b8a85 | 1359 | |
91e490ab MM |
1360 | if (!is_overloaded_fn (fns)) |
1361 | { | |
0f51ccfc | 1362 | error ("%qD is not a function template", fns); |
91e490ab MM |
1363 | return error_mark_node; |
1364 | } | |
1365 | ||
5fe7b654 GB |
1366 | /* Count the number of template headers specified for this |
1367 | specialization. */ | |
1368 | header_count = 0; | |
c8094d83 | 1369 | for (b = current_binding_level; |
98f99d7f | 1370 | b->kind == sk_template_parms; |
5fe7b654 GB |
1371 | b = b->level_chain) |
1372 | ++header_count; | |
1373 | ||
2c73f9f5 | 1374 | for (; fns; fns = OVL_NEXT (fns)) |
386b8a85 | 1375 | { |
9dfce8fd | 1376 | tree fn = OVL_CURRENT (fns); |
03017874 MM |
1377 | |
1378 | if (TREE_CODE (fn) == TEMPLATE_DECL) | |
d955f6ea KL |
1379 | { |
1380 | tree decl_arg_types; | |
0da99d4e | 1381 | tree fn_arg_types; |
d955f6ea KL |
1382 | |
1383 | /* DECL might be a specialization of FN. */ | |
1384 | ||
1385 | /* Adjust the type of DECL in case FN is a static member. */ | |
1386 | decl_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl)); | |
c8094d83 | 1387 | if (DECL_STATIC_FUNCTION_P (fn) |
d955f6ea KL |
1388 | && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)) |
1389 | decl_arg_types = TREE_CHAIN (decl_arg_types); | |
1390 | ||
1391 | /* Check that the number of function parameters matches. | |
1392 | For example, | |
1393 | template <class T> void f(int i = 0); | |
1394 | template <> void f<int>(); | |
0e339752 | 1395 | The specialization f<int> is invalid but is not caught |
d955f6ea KL |
1396 | by get_bindings below. */ |
1397 | ||
0da99d4e GB |
1398 | fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (fn)); |
1399 | if (list_length (fn_arg_types) != list_length (decl_arg_types)) | |
1400 | continue; | |
1401 | ||
1402 | /* For a non-static member function, we need to make sure that | |
1403 | the const qualification is the same. This can be done by | |
1404 | checking the 'this' in the argument list. */ | |
1405 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fn) | |
c8094d83 | 1406 | && !same_type_p (TREE_VALUE (fn_arg_types), |
0da99d4e | 1407 | TREE_VALUE (decl_arg_types))) |
d955f6ea KL |
1408 | continue; |
1409 | ||
5fe7b654 GB |
1410 | /* In case of explicit specialization, we need to check if |
1411 | the number of template headers appearing in the specialization | |
1412 | is correct. This is usually done in check_explicit_specialization, | |
1413 | but the check done there cannot be exhaustive when specializing | |
1414 | member functions. Consider the following code: | |
1415 | ||
1416 | template <> void A<int>::f(int); | |
1417 | template <> template <> void A<int>::f(int); | |
1418 | ||
1419 | Assuming that A<int> is not itself an explicit specialization | |
1420 | already, the first line specializes "f" which is a non-template | |
1421 | member function, whilst the second line specializes "f" which | |
1422 | is a template member function. So both lines are syntactically | |
1423 | correct, and check_explicit_specialization does not reject | |
1424 | them. | |
c8094d83 | 1425 | |
5fe7b654 GB |
1426 | Here, we can do better, as we are matching the specialization |
1427 | against the declarations. We count the number of template | |
1428 | headers, and we check if they match TEMPLATE_COUNT + 1 | |
1429 | (TEMPLATE_COUNT is the number of qualifying template classes, | |
1430 | plus there must be another header for the member template | |
1431 | itself). | |
c8094d83 | 1432 | |
5fe7b654 GB |
1433 | Notice that if header_count is zero, this is not a |
1434 | specialization but rather a template instantiation, so there | |
1435 | is no check we can perform here. */ | |
1436 | if (header_count && header_count != template_count + 1) | |
1437 | continue; | |
1438 | ||
98f99d7f MM |
1439 | /* Check that the number of template arguments at the |
1440 | innermost level for DECL is the same as for FN. */ | |
1441 | if (current_binding_level->kind == sk_template_parms | |
1442 | && !current_binding_level->explicit_spec_p | |
1443 | && (TREE_VEC_LENGTH (DECL_INNERMOST_TEMPLATE_PARMS (fn)) | |
1444 | != TREE_VEC_LENGTH (TREE_VALUE (current_template_parms)))) | |
1445 | continue; | |
c8094d83 | 1446 | |
d955f6ea KL |
1447 | /* See whether this function might be a specialization of this |
1448 | template. */ | |
a34d3336 | 1449 | targs = get_bindings (fn, decl, explicit_targs, /*check_ret=*/true); |
d955f6ea KL |
1450 | |
1451 | if (!targs) | |
1452 | /* We cannot deduce template arguments that when used to | |
1453 | specialize TMPL will produce DECL. */ | |
1454 | continue; | |
1455 | ||
1456 | /* Save this template, and the arguments deduced. */ | |
1457 | templates = tree_cons (targs, fn, templates); | |
1458 | } | |
03017874 MM |
1459 | else if (need_member_template) |
1460 | /* FN is an ordinary member function, and we need a | |
1461 | specialization of a member template. */ | |
d955f6ea | 1462 | ; |
03017874 MM |
1463 | else if (TREE_CODE (fn) != FUNCTION_DECL) |
1464 | /* We can get IDENTIFIER_NODEs here in certain erroneous | |
1465 | cases. */ | |
d955f6ea | 1466 | ; |
03017874 MM |
1467 | else if (!DECL_FUNCTION_MEMBER_P (fn)) |
1468 | /* This is just an ordinary non-member function. Nothing can | |
1469 | be a specialization of that. */ | |
d955f6ea | 1470 | ; |
3b82c249 KL |
1471 | else if (DECL_ARTIFICIAL (fn)) |
1472 | /* Cannot specialize functions that are created implicitly. */ | |
d955f6ea | 1473 | ; |
75650646 | 1474 | else |
03017874 MM |
1475 | { |
1476 | tree decl_arg_types; | |
386b8a85 | 1477 | |
03017874 MM |
1478 | /* This is an ordinary member function. However, since |
1479 | we're here, we can assume it's enclosing class is a | |
1480 | template class. For example, | |
c8094d83 | 1481 | |
03017874 MM |
1482 | template <typename T> struct S { void f(); }; |
1483 | template <> void S<int>::f() {} | |
1484 | ||
1485 | Here, S<int>::f is a non-template, but S<int> is a | |
1486 | template class. If FN has the same type as DECL, we | |
1487 | might be in business. */ | |
f5d47abd KL |
1488 | |
1489 | if (!DECL_TEMPLATE_INFO (fn)) | |
1490 | /* Its enclosing class is an explicit specialization | |
1491 | of a template class. This is not a candidate. */ | |
1492 | continue; | |
1493 | ||
03017874 MM |
1494 | if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)), |
1495 | TREE_TYPE (TREE_TYPE (fn)))) | |
1496 | /* The return types differ. */ | |
1497 | continue; | |
1498 | ||
1499 | /* Adjust the type of DECL in case FN is a static member. */ | |
1500 | decl_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl)); | |
c8094d83 | 1501 | if (DECL_STATIC_FUNCTION_P (fn) |
03017874 MM |
1502 | && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)) |
1503 | decl_arg_types = TREE_CHAIN (decl_arg_types); | |
1504 | ||
c8094d83 | 1505 | if (compparms (TYPE_ARG_TYPES (TREE_TYPE (fn)), |
03017874 MM |
1506 | decl_arg_types)) |
1507 | /* They match! */ | |
1508 | candidates = tree_cons (NULL_TREE, fn, candidates); | |
03017874 | 1509 | } |
386b8a85 | 1510 | } |
03017874 | 1511 | |
bf8f3f93 | 1512 | if (templates && TREE_CHAIN (templates)) |
386b8a85 | 1513 | { |
03017874 | 1514 | /* We have: |
c8094d83 | 1515 | |
03017874 MM |
1516 | [temp.expl.spec] |
1517 | ||
1518 | It is possible for a specialization with a given function | |
1519 | signature to be instantiated from more than one function | |
1520 | template. In such cases, explicit specification of the | |
1521 | template arguments must be used to uniquely identify the | |
1522 | function template specialization being specialized. | |
1523 | ||
1524 | Note that here, there's no suggestion that we're supposed to | |
1525 | determine which of the candidate templates is most | |
1526 | specialized. However, we, also have: | |
1527 | ||
1528 | [temp.func.order] | |
1529 | ||
1530 | Partial ordering of overloaded function template | |
1531 | declarations is used in the following contexts to select | |
1532 | the function template to which a function template | |
c8094d83 | 1533 | specialization refers: |
03017874 | 1534 | |
0cbd7506 | 1535 | -- when an explicit specialization refers to a function |
c8094d83 | 1536 | template. |
03017874 MM |
1537 | |
1538 | So, we do use the partial ordering rules, at least for now. | |
0e339752 | 1539 | This extension can only serve to make invalid programs valid, |
03017874 MM |
1540 | so it's safe. And, there is strong anecdotal evidence that |
1541 | the committee intended the partial ordering rules to apply; | |
1542 | the EDG front-end has that behavior, and John Spicer claims | |
1543 | that the committee simply forgot to delete the wording in | |
1544 | [temp.expl.spec]. */ | |
1545 | tree tmpl = most_specialized (templates, decl, explicit_targs); | |
1546 | if (tmpl && tmpl != error_mark_node) | |
1547 | { | |
a34d3336 | 1548 | targs = get_bindings (tmpl, decl, explicit_targs, /*check_ret=*/true); |
e1b3e07d | 1549 | templates = tree_cons (targs, tmpl, NULL_TREE); |
03017874 | 1550 | } |
e1467ff2 MM |
1551 | } |
1552 | ||
03017874 | 1553 | if (templates == NULL_TREE && candidates == NULL_TREE) |
e1467ff2 | 1554 | { |
dee15844 JM |
1555 | error ("template-id %qD for %q+D does not match any template " |
1556 | "declaration", template_id, decl); | |
03017874 | 1557 | return error_mark_node; |
386b8a85 | 1558 | } |
03017874 | 1559 | else if ((templates && TREE_CHAIN (templates)) |
bf8f3f93 MM |
1560 | || (candidates && TREE_CHAIN (candidates)) |
1561 | || (templates && candidates)) | |
386b8a85 | 1562 | { |
dee15844 JM |
1563 | error ("ambiguous template specialization %qD for %q+D", |
1564 | template_id, decl); | |
bf8f3f93 MM |
1565 | chainon (candidates, templates); |
1566 | print_candidates (candidates); | |
03017874 | 1567 | return error_mark_node; |
386b8a85 JM |
1568 | } |
1569 | ||
c6002625 | 1570 | /* We have one, and exactly one, match. */ |
03017874 MM |
1571 | if (candidates) |
1572 | { | |
1573 | /* It was a specialization of an ordinary member function in a | |
1574 | template class. */ | |
1575 | *targs_out = copy_node (DECL_TI_ARGS (TREE_VALUE (candidates))); | |
1576 | return DECL_TI_TEMPLATE (TREE_VALUE (candidates)); | |
1577 | } | |
1578 | ||
1579 | /* It was a specialization of a template. */ | |
17aec3eb | 1580 | targs = DECL_TI_ARGS (DECL_TEMPLATE_RESULT (TREE_VALUE (templates))); |
03017874 MM |
1581 | if (TMPL_ARGS_HAVE_MULTIPLE_LEVELS (targs)) |
1582 | { | |
1583 | *targs_out = copy_node (targs); | |
c8094d83 | 1584 | SET_TMPL_ARGS_LEVEL (*targs_out, |
03017874 MM |
1585 | TMPL_ARGS_DEPTH (*targs_out), |
1586 | TREE_PURPOSE (templates)); | |
1587 | } | |
1588 | else | |
1589 | *targs_out = TREE_PURPOSE (templates); | |
e1467ff2 | 1590 | return TREE_VALUE (templates); |
8d08fdba | 1591 | } |
8afa707f MM |
1592 | |
1593 | /* Returns a chain of parameter types, exactly like the SPEC_TYPES, | |
1594 | but with the default argument values filled in from those in the | |
1595 | TMPL_TYPES. */ | |
c8094d83 | 1596 | |
8afa707f | 1597 | static tree |
3a978d72 NN |
1598 | copy_default_args_to_explicit_spec_1 (tree spec_types, |
1599 | tree tmpl_types) | |
8afa707f MM |
1600 | { |
1601 | tree new_spec_types; | |
1602 | ||
1603 | if (!spec_types) | |
1604 | return NULL_TREE; | |
1605 | ||
1606 | if (spec_types == void_list_node) | |
1607 | return void_list_node; | |
1608 | ||
1609 | /* Substitute into the rest of the list. */ | |
1610 | new_spec_types = | |
1611 | copy_default_args_to_explicit_spec_1 (TREE_CHAIN (spec_types), | |
1612 | TREE_CHAIN (tmpl_types)); | |
c8094d83 | 1613 | |
8afa707f MM |
1614 | /* Add the default argument for this parameter. */ |
1615 | return hash_tree_cons (TREE_PURPOSE (tmpl_types), | |
1616 | TREE_VALUE (spec_types), | |
1617 | new_spec_types); | |
1618 | } | |
1619 | ||
1620 | /* DECL is an explicit specialization. Replicate default arguments | |
1621 | from the template it specializes. (That way, code like: | |
1622 | ||
1623 | template <class T> void f(T = 3); | |
1624 | template <> void f(double); | |
c8094d83 | 1625 | void g () { f (); } |
8afa707f MM |
1626 | |
1627 | works, as required.) An alternative approach would be to look up | |
1628 | the correct default arguments at the call-site, but this approach | |
1629 | is consistent with how implicit instantiations are handled. */ | |
1630 | ||
1631 | static void | |
3a978d72 | 1632 | copy_default_args_to_explicit_spec (tree decl) |
8afa707f MM |
1633 | { |
1634 | tree tmpl; | |
1635 | tree spec_types; | |
1636 | tree tmpl_types; | |
1637 | tree new_spec_types; | |
1638 | tree old_type; | |
1639 | tree new_type; | |
1640 | tree t; | |
08c2df0f NS |
1641 | tree object_type = NULL_TREE; |
1642 | tree in_charge = NULL_TREE; | |
e0fff4b3 | 1643 | tree vtt = NULL_TREE; |
8afa707f MM |
1644 | |
1645 | /* See if there's anything we need to do. */ | |
1646 | tmpl = DECL_TI_TEMPLATE (decl); | |
1647 | tmpl_types = TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (tmpl))); | |
1648 | for (t = tmpl_types; t; t = TREE_CHAIN (t)) | |
1649 | if (TREE_PURPOSE (t)) | |
1650 | break; | |
1651 | if (!t) | |
1652 | return; | |
1653 | ||
1654 | old_type = TREE_TYPE (decl); | |
1655 | spec_types = TYPE_ARG_TYPES (old_type); | |
c8094d83 | 1656 | |
8afa707f MM |
1657 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)) |
1658 | { | |
08c2df0f | 1659 | /* Remove the this pointer, but remember the object's type for |
0cbd7506 | 1660 | CV quals. */ |
08c2df0f | 1661 | object_type = TREE_TYPE (TREE_VALUE (spec_types)); |
8afa707f MM |
1662 | spec_types = TREE_CHAIN (spec_types); |
1663 | tmpl_types = TREE_CHAIN (tmpl_types); | |
c8094d83 | 1664 | |
8afa707f | 1665 | if (DECL_HAS_IN_CHARGE_PARM_P (decl)) |
0cbd7506 MS |
1666 | { |
1667 | /* DECL may contain more parameters than TMPL due to the extra | |
1668 | in-charge parameter in constructors and destructors. */ | |
1669 | in_charge = spec_types; | |
08c2df0f NS |
1670 | spec_types = TREE_CHAIN (spec_types); |
1671 | } | |
e0fff4b3 JM |
1672 | if (DECL_HAS_VTT_PARM_P (decl)) |
1673 | { | |
1674 | vtt = spec_types; | |
1675 | spec_types = TREE_CHAIN (spec_types); | |
1676 | } | |
8afa707f MM |
1677 | } |
1678 | ||
1679 | /* Compute the merged default arguments. */ | |
c8094d83 | 1680 | new_spec_types = |
8afa707f MM |
1681 | copy_default_args_to_explicit_spec_1 (spec_types, tmpl_types); |
1682 | ||
08c2df0f NS |
1683 | /* Compute the new FUNCTION_TYPE. */ |
1684 | if (object_type) | |
8afa707f | 1685 | { |
e0fff4b3 | 1686 | if (vtt) |
0cbd7506 MS |
1687 | new_spec_types = hash_tree_cons (TREE_PURPOSE (vtt), |
1688 | TREE_VALUE (vtt), | |
1689 | new_spec_types); | |
e0fff4b3 | 1690 | |
08c2df0f | 1691 | if (in_charge) |
0cbd7506 MS |
1692 | /* Put the in-charge parameter back. */ |
1693 | new_spec_types = hash_tree_cons (TREE_PURPOSE (in_charge), | |
1694 | TREE_VALUE (in_charge), | |
1695 | new_spec_types); | |
08c2df0f | 1696 | |
43dc123f MM |
1697 | new_type = build_method_type_directly (object_type, |
1698 | TREE_TYPE (old_type), | |
1699 | new_spec_types); | |
8afa707f | 1700 | } |
8afa707f MM |
1701 | else |
1702 | new_type = build_function_type (TREE_TYPE (old_type), | |
08c2df0f | 1703 | new_spec_types); |
e9525111 MM |
1704 | new_type = cp_build_type_attribute_variant (new_type, |
1705 | TYPE_ATTRIBUTES (old_type)); | |
8afa707f MM |
1706 | new_type = build_exception_variant (new_type, |
1707 | TYPE_RAISES_EXCEPTIONS (old_type)); | |
1708 | TREE_TYPE (decl) = new_type; | |
1709 | } | |
1710 | ||
386b8a85 | 1711 | /* Check to see if the function just declared, as indicated in |
75650646 MM |
1712 | DECLARATOR, and in DECL, is a specialization of a function |
1713 | template. We may also discover that the declaration is an explicit | |
1714 | instantiation at this point. | |
1715 | ||
e1467ff2 | 1716 | Returns DECL, or an equivalent declaration that should be used |
03017874 MM |
1717 | instead if all goes well. Issues an error message if something is |
1718 | amiss. Returns error_mark_node if the error is not easily | |
1719 | recoverable. | |
c8094d83 MS |
1720 | |
1721 | FLAGS is a bitmask consisting of the following flags: | |
75650646 | 1722 | |
75650646 MM |
1723 | 2: The function has a definition. |
1724 | 4: The function is a friend. | |
75650646 MM |
1725 | |
1726 | The TEMPLATE_COUNT is the number of references to qualifying | |
1727 | template classes that appeared in the name of the function. For | |
1728 | example, in | |
1729 | ||
1730 | template <class T> struct S { void f(); }; | |
1731 | void S<int>::f(); | |
c8094d83 | 1732 | |
75650646 MM |
1733 | the TEMPLATE_COUNT would be 1. However, explicitly specialized |
1734 | classes are not counted in the TEMPLATE_COUNT, so that in | |
1735 | ||
1736 | template <class T> struct S {}; | |
1737 | template <> struct S<int> { void f(); } | |
36a117a5 | 1738 | template <> void S<int>::f(); |
75650646 MM |
1739 | |
1740 | the TEMPLATE_COUNT would be 0. (Note that this declaration is | |
0e339752 | 1741 | invalid; there should be no template <>.) |
75650646 MM |
1742 | |
1743 | If the function is a specialization, it is marked as such via | |
1744 | DECL_TEMPLATE_SPECIALIZATION. Furthermore, its DECL_TEMPLATE_INFO | |
c8094d83 | 1745 | is set up correctly, and it is added to the list of specializations |
75650646 | 1746 | for that template. */ |
386b8a85 | 1747 | |
e1467ff2 | 1748 | tree |
c8094d83 | 1749 | check_explicit_specialization (tree declarator, |
0cbd7506 MS |
1750 | tree decl, |
1751 | int template_count, | |
1752 | int flags) | |
386b8a85 | 1753 | { |
75650646 MM |
1754 | int have_def = flags & 2; |
1755 | int is_friend = flags & 4; | |
1756 | int specialization = 0; | |
e1467ff2 | 1757 | int explicit_instantiation = 0; |
fd4de5ff | 1758 | int member_specialization = 0; |
75650646 MM |
1759 | tree ctype = DECL_CLASS_CONTEXT (decl); |
1760 | tree dname = DECL_NAME (decl); | |
74b846e0 | 1761 | tmpl_spec_kind tsk; |
386b8a85 | 1762 | |
f65b7de3 GB |
1763 | if (is_friend) |
1764 | { | |
1765 | if (!processing_specialization) | |
1766 | tsk = tsk_none; | |
1767 | else | |
1768 | tsk = tsk_excessive_parms; | |
1769 | } | |
1770 | else | |
1771 | tsk = current_tmpl_spec_kind (template_count); | |
75650646 | 1772 | |
74b846e0 MM |
1773 | switch (tsk) |
1774 | { | |
1775 | case tsk_none: | |
c8094d83 | 1776 | if (processing_specialization) |
75650646 | 1777 | { |
fd4de5ff MM |
1778 | specialization = 1; |
1779 | SET_DECL_TEMPLATE_SPECIALIZATION (decl); | |
75650646 | 1780 | } |
74b846e0 | 1781 | else if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR) |
386b8a85 | 1782 | { |
74b846e0 MM |
1783 | if (is_friend) |
1784 | /* This could be something like: | |
75650646 | 1785 | |
74b846e0 MM |
1786 | template <class T> void f(T); |
1787 | class S { friend void f<>(int); } */ | |
1788 | specialization = 1; | |
1789 | else | |
1790 | { | |
1791 | /* This case handles bogus declarations like template <> | |
1792 | template <class T> void f<int>(); */ | |
1793 | ||
0f51ccfc | 1794 | error ("template-id %qD in declaration of primary template", |
0cbd7506 | 1795 | declarator); |
74b846e0 MM |
1796 | return decl; |
1797 | } | |
1798 | } | |
1799 | break; | |
1800 | ||
1801 | case tsk_invalid_member_spec: | |
1802 | /* The error has already been reported in | |
1803 | check_specialization_scope. */ | |
1804 | return error_mark_node; | |
1805 | ||
1806 | case tsk_invalid_expl_inst: | |
33bd39a2 | 1807 | error ("template parameter list used in explicit instantiation"); |
74b846e0 MM |
1808 | |
1809 | /* Fall through. */ | |
1810 | ||
1811 | case tsk_expl_inst: | |
fd4de5ff | 1812 | if (have_def) |
33bd39a2 | 1813 | error ("definition provided for explicit instantiation"); |
c8094d83 | 1814 | |
fd4de5ff | 1815 | explicit_instantiation = 1; |
74b846e0 | 1816 | break; |
fd4de5ff | 1817 | |
74b846e0 | 1818 | case tsk_excessive_parms: |
f03adc6b GB |
1819 | case tsk_insufficient_parms: |
1820 | if (tsk == tsk_excessive_parms) | |
0cbd7506 | 1821 | error ("too many template parameter lists in declaration of %qD", |
f03adc6b GB |
1822 | decl); |
1823 | else if (template_header_count) | |
0f51ccfc | 1824 | error("too few template parameter lists in declaration of %qD", decl); |
f03adc6b | 1825 | else |
0f51ccfc | 1826 | error("explicit specialization of %qD must be introduced by " |
9e637a26 | 1827 | "%<template <>%>", decl); |
75650646 | 1828 | |
74b846e0 MM |
1829 | /* Fall through. */ |
1830 | case tsk_expl_spec: | |
1831 | SET_DECL_TEMPLATE_SPECIALIZATION (decl); | |
1832 | if (ctype) | |
1833 | member_specialization = 1; | |
1834 | else | |
1835 | specialization = 1; | |
1836 | break; | |
74b846e0 MM |
1837 | |
1838 | case tsk_template: | |
1839 | if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR) | |
c6f2ed0d | 1840 | { |
fd4de5ff MM |
1841 | /* This case handles bogus declarations like template <> |
1842 | template <class T> void f<int>(); */ | |
75650646 | 1843 | |
655dc6ee | 1844 | if (uses_template_parms (declarator)) |
0f51ccfc | 1845 | error ("function template partial specialization %qD " |
e1e93ad8 | 1846 | "is not allowed", declarator); |
655dc6ee | 1847 | else |
0f51ccfc | 1848 | error ("template-id %qD in declaration of primary template", |
0cbd7506 | 1849 | declarator); |
fd4de5ff | 1850 | return decl; |
386b8a85 | 1851 | } |
74b846e0 MM |
1852 | |
1853 | if (ctype && CLASSTYPE_TEMPLATE_INSTANTIATION (ctype)) | |
1854 | /* This is a specialization of a member template, without | |
1855 | specialization the containing class. Something like: | |
1856 | ||
1857 | template <class T> struct S { | |
c8094d83 | 1858 | template <class U> void f (U); |
0cbd7506 | 1859 | }; |
74b846e0 | 1860 | template <> template <class U> void S<int>::f(U) {} |
c8094d83 | 1861 | |
74b846e0 MM |
1862 | That's a specialization -- but of the entire template. */ |
1863 | specialization = 1; | |
1864 | break; | |
1865 | ||
1866 | default: | |
315fb5db | 1867 | gcc_unreachable (); |
75650646 | 1868 | } |
386b8a85 | 1869 | |
670960ac JM |
1870 | if (specialization || member_specialization) |
1871 | { | |
1872 | tree t = TYPE_ARG_TYPES (TREE_TYPE (decl)); | |
1873 | for (; t; t = TREE_CHAIN (t)) | |
1874 | if (TREE_PURPOSE (t)) | |
1875 | { | |
33bd39a2 | 1876 | pedwarn |
8251199e | 1877 | ("default argument specified in explicit specialization"); |
670960ac JM |
1878 | break; |
1879 | } | |
f3400fe2 | 1880 | if (current_lang_name == lang_name_c) |
33bd39a2 | 1881 | error ("template specialization with C linkage"); |
670960ac JM |
1882 | } |
1883 | ||
e1467ff2 | 1884 | if (specialization || member_specialization || explicit_instantiation) |
75650646 MM |
1885 | { |
1886 | tree tmpl = NULL_TREE; | |
1887 | tree targs = NULL_TREE; | |
75650646 MM |
1888 | |
1889 | /* Make sure that the declarator is a TEMPLATE_ID_EXPR. */ | |
386b8a85 JM |
1890 | if (TREE_CODE (declarator) != TEMPLATE_ID_EXPR) |
1891 | { | |
1892 | tree fns; | |
1893 | ||
50bc768d | 1894 | gcc_assert (TREE_CODE (declarator) == IDENTIFIER_NODE); |
2f54a1db | 1895 | if (ctype) |
386b8a85 | 1896 | fns = dname; |
2f54a1db GB |
1897 | else |
1898 | { | |
1899 | /* If there is no class context, the explicit instantiation | |
0cbd7506 | 1900 | must be at namespace scope. */ |
50bc768d | 1901 | gcc_assert (DECL_NAMESPACE_SCOPE_P (decl)); |
2f54a1db GB |
1902 | |
1903 | /* Find the namespace binding, using the declaration | |
0cbd7506 | 1904 | context. */ |
2f54a1db | 1905 | fns = namespace_binding (dname, CP_DECL_CONTEXT (decl)); |
4230cec2 NS |
1906 | if (!fns || !is_overloaded_fn (fns)) |
1907 | { | |
1908 | error ("%qD is not a template function", dname); | |
1909 | fns = error_mark_node; | |
1910 | } | |
2f54a1db | 1911 | } |
386b8a85 | 1912 | |
2f54a1db | 1913 | declarator = lookup_template_function (fns, NULL_TREE); |
386b8a85 JM |
1914 | } |
1915 | ||
f2e48b67 BK |
1916 | if (declarator == error_mark_node) |
1917 | return error_mark_node; | |
1918 | ||
75650646 MM |
1919 | if (ctype != NULL_TREE && TYPE_BEING_DEFINED (ctype)) |
1920 | { | |
8ec2ac34 | 1921 | if (!explicit_instantiation) |
0e339752 | 1922 | /* A specialization in class scope. This is invalid, |
6c30752f MM |
1923 | but the error will already have been flagged by |
1924 | check_specialization_scope. */ | |
1925 | return error_mark_node; | |
8ec2ac34 | 1926 | else |
b370501f | 1927 | { |
0e339752 | 1928 | /* It's not valid to write an explicit instantiation in |
b370501f | 1929 | class scope, e.g.: |
8ec2ac34 | 1930 | |
0cbd7506 | 1931 | class C { template void f(); } |
8ec2ac34 | 1932 | |
b370501f KG |
1933 | This case is caught by the parser. However, on |
1934 | something like: | |
c8094d83 | 1935 | |
b370501f | 1936 | template class C { void f(); }; |
8ec2ac34 | 1937 | |
0e339752 | 1938 | (which is invalid) we can get here. The error will be |
b370501f KG |
1939 | issued later. */ |
1940 | ; | |
1941 | } | |
8ec2ac34 | 1942 | |
e1467ff2 | 1943 | return decl; |
75650646 | 1944 | } |
c8094d83 | 1945 | else if (ctype != NULL_TREE |
75650646 MM |
1946 | && (TREE_CODE (TREE_OPERAND (declarator, 0)) == |
1947 | IDENTIFIER_NODE)) | |
386b8a85 | 1948 | { |
75650646 MM |
1949 | /* Find the list of functions in ctype that have the same |
1950 | name as the declared function. */ | |
1951 | tree name = TREE_OPERAND (declarator, 0); | |
03017874 MM |
1952 | tree fns = NULL_TREE; |
1953 | int idx; | |
1954 | ||
8ba658ee | 1955 | if (constructor_name_p (name, ctype)) |
386b8a85 | 1956 | { |
75650646 | 1957 | int is_constructor = DECL_CONSTRUCTOR_P (decl); |
c8094d83 | 1958 | |
75650646 | 1959 | if (is_constructor ? !TYPE_HAS_CONSTRUCTOR (ctype) |
9f4faeae | 1960 | : !CLASSTYPE_DESTRUCTORS (ctype)) |
75650646 MM |
1961 | { |
1962 | /* From [temp.expl.spec]: | |
c8094d83 | 1963 | |
75650646 MM |
1964 | If such an explicit specialization for the member |
1965 | of a class template names an implicitly-declared | |
1966 | special member function (clause _special_), the | |
c8094d83 | 1967 | program is ill-formed. |
e1467ff2 MM |
1968 | |
1969 | Similar language is found in [temp.explicit]. */ | |
33bd39a2 | 1970 | error ("specialization of implicitly-declared special member function"); |
03017874 | 1971 | return error_mark_node; |
75650646 | 1972 | } |
386b8a85 | 1973 | |
42da2fd8 | 1974 | name = is_constructor ? ctor_identifier : dtor_identifier; |
75650646 | 1975 | } |
42da2fd8 | 1976 | |
421844e7 | 1977 | if (!DECL_CONV_FN_P (decl)) |
03017874 MM |
1978 | { |
1979 | idx = lookup_fnfields_1 (ctype, name); | |
1980 | if (idx >= 0) | |
aaaa46d2 | 1981 | fns = VEC_index (tree, CLASSTYPE_METHOD_VEC (ctype), idx); |
03017874 MM |
1982 | } |
1983 | else | |
1984 | { | |
d4e6fecb | 1985 | VEC(tree,gc) *methods; |
aaaa46d2 | 1986 | tree ovl; |
03017874 MM |
1987 | |
1988 | /* For a type-conversion operator, we cannot do a | |
1989 | name-based lookup. We might be looking for `operator | |
1990 | int' which will be a specialization of `operator T'. | |
1991 | So, we find *all* the conversion operators, and then | |
1992 | select from them. */ | |
1993 | fns = NULL_TREE; | |
1994 | ||
1995 | methods = CLASSTYPE_METHOD_VEC (ctype); | |
1996 | if (methods) | |
5dd236e2 | 1997 | for (idx = CLASSTYPE_FIRST_CONVERSION_SLOT; |
9ba5ff0f | 1998 | VEC_iterate (tree, methods, idx, ovl); |
aaaa46d2 | 1999 | ++idx) |
03017874 | 2000 | { |
aaaa46d2 | 2001 | if (!DECL_CONV_FN_P (OVL_CURRENT (ovl))) |
03017874 MM |
2002 | /* There are no more conversion functions. */ |
2003 | break; | |
2004 | ||
2005 | /* Glue all these conversion functions together | |
2006 | with those we already have. */ | |
2007 | for (; ovl; ovl = OVL_NEXT (ovl)) | |
2008 | fns = ovl_cons (OVL_CURRENT (ovl), fns); | |
2009 | } | |
2010 | } | |
c8094d83 MS |
2011 | |
2012 | if (fns == NULL_TREE) | |
386b8a85 | 2013 | { |
0f51ccfc | 2014 | error ("no member function %qD declared in %qT", name, ctype); |
03017874 | 2015 | return error_mark_node; |
386b8a85 JM |
2016 | } |
2017 | else | |
2018 | TREE_OPERAND (declarator, 0) = fns; | |
2019 | } | |
c8094d83 | 2020 | |
e1467ff2 MM |
2021 | /* Figure out what exactly is being specialized at this point. |
2022 | Note that for an explicit instantiation, even one for a | |
38e01259 | 2023 | member function, we cannot tell apriori whether the |
e1467ff2 | 2024 | instantiation is for a member template, or just a member |
36a117a5 MM |
2025 | function of a template class. Even if a member template is |
2026 | being instantiated, the member template arguments may be | |
2027 | elided if they can be deduced from the rest of the | |
2028 | declaration. */ | |
e1467ff2 | 2029 | tmpl = determine_specialization (declarator, decl, |
c8094d83 | 2030 | &targs, |
5fe7b654 GB |
2031 | member_specialization, |
2032 | template_count); | |
c8094d83 | 2033 | |
03017874 MM |
2034 | if (!tmpl || tmpl == error_mark_node) |
2035 | /* We couldn't figure out what this declaration was | |
2036 | specializing. */ | |
2037 | return error_mark_node; | |
2038 | else | |
386b8a85 | 2039 | { |
25aab5d0 | 2040 | tree gen_tmpl = most_general_template (tmpl); |
36a117a5 | 2041 | |
e1467ff2 MM |
2042 | if (explicit_instantiation) |
2043 | { | |
03d0f4af | 2044 | /* We don't set DECL_EXPLICIT_INSTANTIATION here; that |
c8094d83 | 2045 | is done by do_decl_instantiation later. */ |
25aab5d0 MM |
2046 | |
2047 | int arg_depth = TMPL_ARGS_DEPTH (targs); | |
2048 | int parm_depth = TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (tmpl)); | |
2049 | ||
2050 | if (arg_depth > parm_depth) | |
2051 | { | |
2052 | /* If TMPL is not the most general template (for | |
2053 | example, if TMPL is a friend template that is | |
2054 | injected into namespace scope), then there will | |
dc957d14 | 2055 | be too many levels of TARGS. Remove some of them |
25aab5d0 MM |
2056 | here. */ |
2057 | int i; | |
2058 | tree new_targs; | |
2059 | ||
f31c0a32 | 2060 | new_targs = make_tree_vec (parm_depth); |
25aab5d0 MM |
2061 | for (i = arg_depth - parm_depth; i < arg_depth; ++i) |
2062 | TREE_VEC_ELT (new_targs, i - (arg_depth - parm_depth)) | |
2063 | = TREE_VEC_ELT (targs, i); | |
2064 | targs = new_targs; | |
2065 | } | |
c8094d83 | 2066 | |
3e4a3562 | 2067 | return instantiate_template (tmpl, targs, tf_error); |
e1467ff2 | 2068 | } |
74b846e0 | 2069 | |
6c07f448 KL |
2070 | /* If we thought that the DECL was a member function, but it |
2071 | turns out to be specializing a static member function, | |
4546865e | 2072 | make DECL a static member function as well. */ |
6c07f448 KL |
2073 | if (DECL_STATIC_FUNCTION_P (tmpl) |
2074 | && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)) | |
4546865e | 2075 | revert_static_member_fn (decl); |
6c07f448 | 2076 | |
f9a7ae04 MM |
2077 | /* If this is a specialization of a member template of a |
2078 | template class. In we want to return the TEMPLATE_DECL, | |
2079 | not the specialization of it. */ | |
74b846e0 MM |
2080 | if (tsk == tsk_template) |
2081 | { | |
2082 | SET_DECL_TEMPLATE_SPECIALIZATION (tmpl); | |
f9a7ae04 | 2083 | DECL_INITIAL (DECL_TEMPLATE_RESULT (tmpl)) = NULL_TREE; |
b190f239 NS |
2084 | if (have_def) |
2085 | { | |
f31686a3 RH |
2086 | DECL_SOURCE_LOCATION (tmpl) = DECL_SOURCE_LOCATION (decl); |
2087 | DECL_SOURCE_LOCATION (DECL_TEMPLATE_RESULT (tmpl)) | |
2088 | = DECL_SOURCE_LOCATION (decl); | |
08167d1c AO |
2089 | /* We want to use the argument list specified in the |
2090 | definition, not in the original declaration. */ | |
2091 | DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (tmpl)) | |
2092 | = DECL_ARGUMENTS (decl); | |
b190f239 | 2093 | } |
74b846e0 MM |
2094 | return tmpl; |
2095 | } | |
2096 | ||
36a117a5 | 2097 | /* Set up the DECL_TEMPLATE_INFO for DECL. */ |
e1b3e07d | 2098 | DECL_TEMPLATE_INFO (decl) = tree_cons (tmpl, targs, NULL_TREE); |
36a117a5 | 2099 | |
8afa707f MM |
2100 | /* Inherit default function arguments from the template |
2101 | DECL is specializing. */ | |
2102 | copy_default_args_to_explicit_spec (decl); | |
2103 | ||
c750255c MM |
2104 | /* This specialization has the same protection as the |
2105 | template it specializes. */ | |
2106 | TREE_PRIVATE (decl) = TREE_PRIVATE (gen_tmpl); | |
2107 | TREE_PROTECTED (decl) = TREE_PROTECTED (gen_tmpl); | |
8d039470 MS |
2108 | /* The specialization has the same visibility as the |
2109 | template it specializes. */ | |
2110 | if (DECL_VISIBILITY_SPECIFIED (gen_tmpl)) | |
2111 | { | |
2112 | DECL_VISIBILITY_SPECIFIED (decl) = 1; | |
2113 | DECL_VISIBILITY (decl) = DECL_VISIBILITY (gen_tmpl); | |
2114 | } | |
9c12301f MM |
2115 | /* If DECL is a friend declaration, declared using an |
2116 | unqualified name, the namespace associated with DECL may | |
2117 | have been set incorrectly. For example, in: | |
2118 | ||
2119 | template <typename T> void f(T); | |
2120 | namespace N { | |
2121 | struct S { friend void f<int>(int); } | |
2122 | } | |
2123 | ||
2124 | we will have set the DECL_CONTEXT for the friend | |
2125 | declaration to N, rather than to the global namespace. */ | |
2126 | if (DECL_NAMESPACE_SCOPE_P (decl)) | |
2127 | DECL_CONTEXT (decl) = DECL_CONTEXT (tmpl); | |
8d039470 | 2128 | |
386b8a85 | 2129 | if (is_friend && !have_def) |
36a117a5 MM |
2130 | /* This is not really a declaration of a specialization. |
2131 | It's just the name of an instantiation. But, it's not | |
2132 | a request for an instantiation, either. */ | |
fbf1c34b | 2133 | SET_DECL_IMPLICIT_INSTANTIATION (decl); |
08511114 KL |
2134 | else if (DECL_CONSTRUCTOR_P (decl) || DECL_DESTRUCTOR_P (decl)) |
2135 | /* This is indeed a specialization. In case of constructors | |
2136 | and destructors, we need in-charge and not-in-charge | |
2137 | versions in V3 ABI. */ | |
2138 | clone_function_decl (decl, /*update_method_vec_p=*/0); | |
75650646 | 2139 | |
36a117a5 MM |
2140 | /* Register this specialization so that we can find it |
2141 | again. */ | |
d63d5d0c | 2142 | decl = register_specialization (decl, gen_tmpl, targs, is_friend); |
386b8a85 JM |
2143 | } |
2144 | } | |
c8094d83 | 2145 | |
e1467ff2 | 2146 | return decl; |
386b8a85 | 2147 | } |
75650646 | 2148 | |
75650646 MM |
2149 | /* Returns 1 iff PARMS1 and PARMS2 are identical sets of template |
2150 | parameters. These are represented in the same format used for | |
2151 | DECL_TEMPLATE_PARMS. */ | |
2152 | ||
50bc768d NS |
2153 | int |
2154 | comp_template_parms (tree parms1, tree parms2) | |
75650646 MM |
2155 | { |
2156 | tree p1; | |
2157 | tree p2; | |
2158 | ||
2159 | if (parms1 == parms2) | |
2160 | return 1; | |
2161 | ||
c8094d83 | 2162 | for (p1 = parms1, p2 = parms2; |
75650646 MM |
2163 | p1 != NULL_TREE && p2 != NULL_TREE; |
2164 | p1 = TREE_CHAIN (p1), p2 = TREE_CHAIN (p2)) | |
2165 | { | |
2166 | tree t1 = TREE_VALUE (p1); | |
2167 | tree t2 = TREE_VALUE (p2); | |
2168 | int i; | |
2169 | ||
50bc768d NS |
2170 | gcc_assert (TREE_CODE (t1) == TREE_VEC); |
2171 | gcc_assert (TREE_CODE (t2) == TREE_VEC); | |
75650646 MM |
2172 | |
2173 | if (TREE_VEC_LENGTH (t1) != TREE_VEC_LENGTH (t2)) | |
2174 | return 0; | |
2175 | ||
c8094d83 | 2176 | for (i = 0; i < TREE_VEC_LENGTH (t2); ++i) |
75650646 MM |
2177 | { |
2178 | tree parm1 = TREE_VALUE (TREE_VEC_ELT (t1, i)); | |
2179 | tree parm2 = TREE_VALUE (TREE_VEC_ELT (t2, i)); | |
2180 | ||
2181 | if (TREE_CODE (parm1) != TREE_CODE (parm2)) | |
2182 | return 0; | |
2183 | ||
2184 | if (TREE_CODE (parm1) == TEMPLATE_TYPE_PARM) | |
2185 | continue; | |
3bfdc719 | 2186 | else if (!same_type_p (TREE_TYPE (parm1), TREE_TYPE (parm2))) |
75650646 MM |
2187 | return 0; |
2188 | } | |
2189 | } | |
2190 | ||
2191 | if ((p1 != NULL_TREE) != (p2 != NULL_TREE)) | |
2192 | /* One set of parameters has more parameters lists than the | |
2193 | other. */ | |
2194 | return 0; | |
2195 | ||
2196 | return 1; | |
2197 | } | |
2198 | ||
f3400fe2 JM |
2199 | /* Complain if DECL shadows a template parameter. |
2200 | ||
2201 | [temp.local]: A template-parameter shall not be redeclared within its | |
2202 | scope (including nested scopes). */ | |
2203 | ||
2204 | void | |
3a978d72 | 2205 | check_template_shadow (tree decl) |
f3400fe2 | 2206 | { |
8f032717 MM |
2207 | tree olddecl; |
2208 | ||
b5d9b9ab MM |
2209 | /* If we're not in a template, we can't possibly shadow a template |
2210 | parameter. */ | |
2211 | if (!current_template_parms) | |
2212 | return; | |
2213 | ||
2214 | /* Figure out what we're shadowing. */ | |
8f032717 MM |
2215 | if (TREE_CODE (decl) == OVERLOAD) |
2216 | decl = OVL_CURRENT (decl); | |
90ea9897 | 2217 | olddecl = innermost_non_namespace_value (DECL_NAME (decl)); |
f3400fe2 | 2218 | |
b5d9b9ab MM |
2219 | /* If there's no previous binding for this name, we're not shadowing |
2220 | anything, let alone a template parameter. */ | |
2221 | if (!olddecl) | |
2222 | return; | |
2223 | ||
2224 | /* If we're not shadowing a template parameter, we're done. Note | |
2225 | that OLDDECL might be an OVERLOAD (or perhaps even an | |
2226 | ERROR_MARK), so we can't just blithely assume it to be a _DECL | |
2227 | node. */ | |
2f939d94 | 2228 | if (!DECL_P (olddecl) || !DECL_TEMPLATE_PARM_P (olddecl)) |
b5d9b9ab MM |
2229 | return; |
2230 | ||
2231 | /* We check for decl != olddecl to avoid bogus errors for using a | |
2232 | name inside a class. We check TPFI to avoid duplicate errors for | |
2233 | inline member templates. */ | |
c8094d83 | 2234 | if (decl == olddecl |
b5d9b9ab MM |
2235 | || TEMPLATE_PARMS_FOR_INLINE (current_template_parms)) |
2236 | return; | |
2237 | ||
dee15844 JM |
2238 | error ("declaration of %q+#D", decl); |
2239 | error (" shadows template parm %q+#D", olddecl); | |
f3400fe2 | 2240 | } |
22a7be53 | 2241 | |
f3400fe2 | 2242 | /* Return a new TEMPLATE_PARM_INDEX with the indicated INDEX, LEVEL, |
f84b4be9 JM |
2243 | ORIG_LEVEL, DECL, and TYPE. */ |
2244 | ||
2245 | static tree | |
c8094d83 | 2246 | build_template_parm_index (int index, |
0cbd7506 MS |
2247 | int level, |
2248 | int orig_level, | |
2249 | tree decl, | |
2250 | tree type) | |
f84b4be9 JM |
2251 | { |
2252 | tree t = make_node (TEMPLATE_PARM_INDEX); | |
2253 | TEMPLATE_PARM_IDX (t) = index; | |
2254 | TEMPLATE_PARM_LEVEL (t) = level; | |
2255 | TEMPLATE_PARM_ORIG_LEVEL (t) = orig_level; | |
2256 | TEMPLATE_PARM_DECL (t) = decl; | |
2257 | TREE_TYPE (t) = type; | |
3e4a3562 | 2258 | TREE_CONSTANT (t) = TREE_CONSTANT (decl); |
6de9cd9a | 2259 | TREE_INVARIANT (t) = TREE_INVARIANT (decl); |
3e4a3562 | 2260 | TREE_READONLY (t) = TREE_READONLY (decl); |
f84b4be9 JM |
2261 | |
2262 | return t; | |
2263 | } | |
2264 | ||
f84b4be9 | 2265 | /* Return a TEMPLATE_PARM_INDEX, similar to INDEX, but whose |
93cdc044 | 2266 | TEMPLATE_PARM_LEVEL has been decreased by LEVELS. If such a |
f84b4be9 JM |
2267 | TEMPLATE_PARM_INDEX already exists, it is returned; otherwise, a |
2268 | new one is created. */ | |
2269 | ||
c8094d83 | 2270 | static tree |
3a978d72 | 2271 | reduce_template_parm_level (tree index, tree type, int levels) |
f84b4be9 JM |
2272 | { |
2273 | if (TEMPLATE_PARM_DESCENDANTS (index) == NULL_TREE | |
2274 | || (TEMPLATE_PARM_LEVEL (TEMPLATE_PARM_DESCENDANTS (index)) | |
93cdc044 | 2275 | != TEMPLATE_PARM_LEVEL (index) - levels)) |
f84b4be9 | 2276 | { |
3e4a3562 NS |
2277 | tree orig_decl = TEMPLATE_PARM_DECL (index); |
2278 | tree decl, t; | |
c8094d83 | 2279 | |
3e4a3562 NS |
2280 | decl = build_decl (TREE_CODE (orig_decl), DECL_NAME (orig_decl), type); |
2281 | TREE_CONSTANT (decl) = TREE_CONSTANT (orig_decl); | |
6de9cd9a | 2282 | TREE_INVARIANT (decl) = TREE_INVARIANT (orig_decl); |
3e4a3562 NS |
2283 | TREE_READONLY (decl) = TREE_READONLY (orig_decl); |
2284 | DECL_ARTIFICIAL (decl) = 1; | |
2285 | SET_DECL_TEMPLATE_PARM_P (decl); | |
c8094d83 | 2286 | |
3e4a3562 | 2287 | t = build_template_parm_index (TEMPLATE_PARM_IDX (index), |
93cdc044 | 2288 | TEMPLATE_PARM_LEVEL (index) - levels, |
f84b4be9 JM |
2289 | TEMPLATE_PARM_ORIG_LEVEL (index), |
2290 | decl, type); | |
2291 | TEMPLATE_PARM_DESCENDANTS (index) = t; | |
cae40af6 | 2292 | |
820cc88f DB |
2293 | /* Template template parameters need this. */ |
2294 | if (TREE_CODE (decl) != CONST_DECL) | |
2295 | DECL_TEMPLATE_PARMS (decl) | |
2296 | = DECL_TEMPLATE_PARMS (TEMPLATE_PARM_DECL (index)); | |
f84b4be9 JM |
2297 | } |
2298 | ||
2299 | return TEMPLATE_PARM_DESCENDANTS (index); | |
2300 | } | |
2301 | ||
8d08fdba | 2302 | /* Process information from new template parameter NEXT and append it to the |
058b15c1 MM |
2303 | LIST being built. This new parameter is a non-type parameter iff |
2304 | IS_NON_TYPE is true. */ | |
e92cc029 | 2305 | |
8d08fdba | 2306 | tree |
058b15c1 | 2307 | process_template_parm (tree list, tree next, bool is_non_type) |
8d08fdba MS |
2308 | { |
2309 | tree parm; | |
2310 | tree decl = 0; | |
a292b002 | 2311 | tree defval; |
058b15c1 | 2312 | int idx; |
f84b4be9 | 2313 | |
8d08fdba | 2314 | parm = next; |
50bc768d | 2315 | gcc_assert (TREE_CODE (parm) == TREE_LIST); |
a292b002 | 2316 | defval = TREE_PURPOSE (parm); |
5566b478 MS |
2317 | |
2318 | if (list) | |
2319 | { | |
2320 | tree p = TREE_VALUE (tree_last (list)); | |
2321 | ||
1899c3a4 | 2322 | if (TREE_CODE (p) == TYPE_DECL || TREE_CODE (p) == TEMPLATE_DECL) |
5566b478 MS |
2323 | idx = TEMPLATE_TYPE_IDX (TREE_TYPE (p)); |
2324 | else | |
f84b4be9 | 2325 | idx = TEMPLATE_PARM_IDX (DECL_INITIAL (p)); |
5566b478 MS |
2326 | ++idx; |
2327 | } | |
2328 | else | |
2329 | idx = 0; | |
2330 | ||
058b15c1 | 2331 | if (is_non_type) |
8d08fdba | 2332 | { |
058b15c1 MM |
2333 | parm = TREE_VALUE (parm); |
2334 | ||
833aa4c4 | 2335 | SET_DECL_TEMPLATE_PARM_P (parm); |
d490621d MM |
2336 | |
2337 | /* [temp.param] | |
2338 | ||
2339 | The top-level cv-qualifiers on the template-parameter are | |
2340 | ignored when determining its type. */ | |
2341 | TREE_TYPE (parm) = TYPE_MAIN_VARIANT (TREE_TYPE (parm)); | |
2342 | ||
8d08fdba | 2343 | /* A template parameter is not modifiable. */ |
6de9cd9a DN |
2344 | TREE_CONSTANT (parm) = 1; |
2345 | TREE_INVARIANT (parm) = 1; | |
2346 | TREE_READONLY (parm) = 1; | |
11b810f1 | 2347 | if (invalid_nontype_parm_type_p (TREE_TYPE (parm), 1)) |
0cbd7506 | 2348 | TREE_TYPE (parm) = void_type_node; |
8d08fdba | 2349 | decl = build_decl (CONST_DECL, DECL_NAME (parm), TREE_TYPE (parm)); |
6de9cd9a DN |
2350 | TREE_CONSTANT (decl) = 1; |
2351 | TREE_INVARIANT (decl) = 1; | |
2352 | TREE_READONLY (decl) = 1; | |
c8094d83 | 2353 | DECL_INITIAL (parm) = DECL_INITIAL (decl) |
f84b4be9 JM |
2354 | = build_template_parm_index (idx, processing_template_decl, |
2355 | processing_template_decl, | |
2356 | decl, TREE_TYPE (parm)); | |
8d08fdba MS |
2357 | } |
2358 | else | |
2359 | { | |
73b0fce8 | 2360 | tree t; |
058b15c1 | 2361 | parm = TREE_VALUE (TREE_VALUE (parm)); |
c8094d83 | 2362 | |
73b0fce8 KL |
2363 | if (parm && TREE_CODE (parm) == TEMPLATE_DECL) |
2364 | { | |
33848bb0 | 2365 | t = make_aggr_type (TEMPLATE_TEMPLATE_PARM); |
c8094d83 | 2366 | /* This is for distinguishing between real templates and template |
73b0fce8 KL |
2367 | template parameters */ |
2368 | TREE_TYPE (parm) = t; | |
2369 | TREE_TYPE (DECL_TEMPLATE_RESULT (parm)) = t; | |
2370 | decl = parm; | |
2371 | } | |
2372 | else | |
2373 | { | |
33848bb0 | 2374 | t = make_aggr_type (TEMPLATE_TYPE_PARM); |
f4f206f4 | 2375 | /* parm is either IDENTIFIER_NODE or NULL_TREE. */ |
73b0fce8 KL |
2376 | decl = build_decl (TYPE_DECL, parm, t); |
2377 | } | |
c8094d83 | 2378 | |
d2e5ee5c MS |
2379 | TYPE_NAME (t) = decl; |
2380 | TYPE_STUB_DECL (t) = decl; | |
a292b002 | 2381 | parm = decl; |
f84b4be9 | 2382 | TEMPLATE_TYPE_PARM_INDEX (t) |
c8094d83 | 2383 | = build_template_parm_index (idx, processing_template_decl, |
f84b4be9 JM |
2384 | processing_template_decl, |
2385 | decl, TREE_TYPE (parm)); | |
8d08fdba | 2386 | } |
c727aa5e | 2387 | DECL_ARTIFICIAL (decl) = 1; |
cd9f6678 | 2388 | SET_DECL_TEMPLATE_PARM_P (decl); |
8d08fdba | 2389 | pushdecl (decl); |
a292b002 | 2390 | parm = build_tree_list (defval, parm); |
8d08fdba MS |
2391 | return chainon (list, parm); |
2392 | } | |
2393 | ||
2394 | /* The end of a template parameter list has been reached. Process the | |
2395 | tree list into a parameter vector, converting each parameter into a more | |
2396 | useful form. Type parameters are saved as IDENTIFIER_NODEs, and others | |
2397 | as PARM_DECLs. */ | |
2398 | ||
2399 | tree | |
3a978d72 | 2400 | end_template_parm_list (tree parms) |
8d08fdba | 2401 | { |
5566b478 | 2402 | int nparms; |
9471d3e2 | 2403 | tree parm, next; |
5566b478 MS |
2404 | tree saved_parmlist = make_tree_vec (list_length (parms)); |
2405 | ||
5566b478 | 2406 | current_template_parms |
4890c2f4 | 2407 | = tree_cons (size_int (processing_template_decl), |
5566b478 | 2408 | saved_parmlist, current_template_parms); |
8d08fdba | 2409 | |
9471d3e2 NS |
2410 | for (parm = parms, nparms = 0; parm; parm = next, nparms++) |
2411 | { | |
2412 | next = TREE_CHAIN (parm); | |
2413 | TREE_VEC_ELT (saved_parmlist, nparms) = parm; | |
2414 | TREE_CHAIN (parm) = NULL_TREE; | |
2415 | } | |
a292b002 | 2416 | |
67ffc812 MM |
2417 | --processing_template_parmlist; |
2418 | ||
8d08fdba MS |
2419 | return saved_parmlist; |
2420 | } | |
2421 | ||
5566b478 MS |
2422 | /* end_template_decl is called after a template declaration is seen. */ |
2423 | ||
8d08fdba | 2424 | void |
3a978d72 | 2425 | end_template_decl (void) |
8d08fdba | 2426 | { |
386b8a85 JM |
2427 | reset_specialization (); |
2428 | ||
5156628f | 2429 | if (! processing_template_decl) |
73aad9b9 JM |
2430 | return; |
2431 | ||
5566b478 | 2432 | /* This matches the pushlevel in begin_template_parm_list. */ |
74b846e0 | 2433 | finish_scope (); |
8d08fdba | 2434 | |
5566b478 MS |
2435 | --processing_template_decl; |
2436 | current_template_parms = TREE_CHAIN (current_template_parms); | |
5566b478 | 2437 | } |
8d08fdba | 2438 | |
36a117a5 MM |
2439 | /* Given a template argument vector containing the template PARMS. |
2440 | The innermost PARMS are given first. */ | |
9a3b49ac MS |
2441 | |
2442 | tree | |
3a978d72 | 2443 | current_template_args (void) |
5566b478 | 2444 | { |
36a117a5 | 2445 | tree header; |
b370501f | 2446 | tree args = NULL_TREE; |
36a117a5 | 2447 | int length = TMPL_PARMS_DEPTH (current_template_parms); |
98c1c668 JM |
2448 | int l = length; |
2449 | ||
36a117a5 MM |
2450 | /* If there is only one level of template parameters, we do not |
2451 | create a TREE_VEC of TREE_VECs. Instead, we return a single | |
2452 | TREE_VEC containing the arguments. */ | |
2453 | if (length > 1) | |
2454 | args = make_tree_vec (length); | |
2455 | ||
2456 | for (header = current_template_parms; header; header = TREE_CHAIN (header)) | |
8d08fdba | 2457 | { |
5566b478 | 2458 | tree a = copy_node (TREE_VALUE (header)); |
36a117a5 MM |
2459 | int i; |
2460 | ||
5566b478 | 2461 | TREE_TYPE (a) = NULL_TREE; |
36a117a5 | 2462 | for (i = TREE_VEC_LENGTH (a) - 1; i >= 0; --i) |
5566b478 | 2463 | { |
98c1c668 JM |
2464 | tree t = TREE_VEC_ELT (a, i); |
2465 | ||
36a117a5 | 2466 | /* T will be a list if we are called from within a |
98c1c668 JM |
2467 | begin/end_template_parm_list pair, but a vector directly |
2468 | if within a begin/end_member_template_processing pair. */ | |
c8094d83 | 2469 | if (TREE_CODE (t) == TREE_LIST) |
98c1c668 JM |
2470 | { |
2471 | t = TREE_VALUE (t); | |
c8094d83 MS |
2472 | |
2473 | if (TREE_CODE (t) == TYPE_DECL | |
73b0fce8 | 2474 | || TREE_CODE (t) == TEMPLATE_DECL) |
98c1c668 JM |
2475 | t = TREE_TYPE (t); |
2476 | else | |
2477 | t = DECL_INITIAL (t); | |
36a117a5 | 2478 | TREE_VEC_ELT (a, i) = t; |
98c1c668 | 2479 | } |
5566b478 | 2480 | } |
36a117a5 MM |
2481 | |
2482 | if (length > 1) | |
2483 | TREE_VEC_ELT (args, --l) = a; | |
2484 | else | |
2485 | args = a; | |
8d08fdba MS |
2486 | } |
2487 | ||
9a3b49ac MS |
2488 | return args; |
2489 | } | |
75650646 | 2490 | |
e1467ff2 | 2491 | /* Return a TEMPLATE_DECL corresponding to DECL, using the indicated |
c7222c02 | 2492 | template PARMS. If MEMBER_TEMPLATE_P is true, the new template is |
ee81147e | 2493 | a member template. Used by push_template_decl below. */ |
e1467ff2 | 2494 | |
75650646 | 2495 | static tree |
c7222c02 | 2496 | build_template_decl (tree decl, tree parms, bool member_template_p) |
75650646 MM |
2497 | { |
2498 | tree tmpl = build_lang_decl (TEMPLATE_DECL, DECL_NAME (decl), NULL_TREE); | |
2499 | DECL_TEMPLATE_PARMS (tmpl) = parms; | |
2500 | DECL_CONTEXT (tmpl) = DECL_CONTEXT (decl); | |
c7222c02 | 2501 | DECL_MEMBER_TEMPLATE_P (tmpl) = member_template_p; |
75650646 MM |
2502 | if (DECL_LANG_SPECIFIC (decl)) |
2503 | { | |
8f032717 MM |
2504 | DECL_STATIC_FUNCTION_P (tmpl) = DECL_STATIC_FUNCTION_P (decl); |
2505 | DECL_CONSTRUCTOR_P (tmpl) = DECL_CONSTRUCTOR_P (decl); | |
c8460010 | 2506 | DECL_DESTRUCTOR_P (tmpl) = DECL_DESTRUCTOR_P (decl); |
11f98788 | 2507 | DECL_NONCONVERTING_P (tmpl) = DECL_NONCONVERTING_P (decl); |
1f6e1acc AS |
2508 | DECL_ASSIGNMENT_OPERATOR_P (tmpl) = DECL_ASSIGNMENT_OPERATOR_P (decl); |
2509 | if (DECL_OVERLOADED_OPERATOR_P (decl)) | |
c8094d83 | 2510 | SET_OVERLOADED_OPERATOR_CODE (tmpl, |
1f6e1acc | 2511 | DECL_OVERLOADED_OPERATOR_P (decl)); |
75650646 MM |
2512 | } |
2513 | ||
2514 | return tmpl; | |
2515 | } | |
2516 | ||
050367a3 MM |
2517 | struct template_parm_data |
2518 | { | |
6c30752f MM |
2519 | /* The level of the template parameters we are currently |
2520 | processing. */ | |
050367a3 | 2521 | int level; |
6c30752f MM |
2522 | |
2523 | /* The index of the specialization argument we are currently | |
2524 | processing. */ | |
2525 | int current_arg; | |
2526 | ||
2527 | /* An array whose size is the number of template parameters. The | |
838dfd8a | 2528 | elements are nonzero if the parameter has been used in any one |
6c30752f | 2529 | of the arguments processed so far. */ |
050367a3 | 2530 | int* parms; |
6c30752f MM |
2531 | |
2532 | /* An array whose size is the number of template arguments. The | |
838dfd8a | 2533 | elements are nonzero if the argument makes use of template |
6c30752f MM |
2534 | parameters of this level. */ |
2535 | int* arg_uses_template_parms; | |
050367a3 MM |
2536 | }; |
2537 | ||
2538 | /* Subroutine of push_template_decl used to see if each template | |
2539 | parameter in a partial specialization is used in the explicit | |
2540 | argument list. If T is of the LEVEL given in DATA (which is | |
2541 | treated as a template_parm_data*), then DATA->PARMS is marked | |
2542 | appropriately. */ | |
2543 | ||
2544 | static int | |
3a978d72 | 2545 | mark_template_parm (tree t, void* data) |
050367a3 MM |
2546 | { |
2547 | int level; | |
2548 | int idx; | |
2549 | struct template_parm_data* tpd = (struct template_parm_data*) data; | |
2550 | ||
2551 | if (TREE_CODE (t) == TEMPLATE_PARM_INDEX) | |
2552 | { | |
2553 | level = TEMPLATE_PARM_LEVEL (t); | |
2554 | idx = TEMPLATE_PARM_IDX (t); | |
2555 | } | |
2556 | else | |
2557 | { | |
2558 | level = TEMPLATE_TYPE_LEVEL (t); | |
2559 | idx = TEMPLATE_TYPE_IDX (t); | |
2560 | } | |
2561 | ||
2562 | if (level == tpd->level) | |
6c30752f MM |
2563 | { |
2564 | tpd->parms[idx] = 1; | |
2565 | tpd->arg_uses_template_parms[tpd->current_arg] = 1; | |
2566 | } | |
050367a3 MM |
2567 | |
2568 | /* Return zero so that for_each_template_parm will continue the | |
2569 | traversal of the tree; we want to mark *every* template parm. */ | |
2570 | return 0; | |
2571 | } | |
2572 | ||
6c30752f MM |
2573 | /* Process the partial specialization DECL. */ |
2574 | ||
e9659ab0 | 2575 | static tree |
3a978d72 | 2576 | process_partial_specialization (tree decl) |
6c30752f MM |
2577 | { |
2578 | tree type = TREE_TYPE (decl); | |
2579 | tree maintmpl = CLASSTYPE_TI_TEMPLATE (type); | |
2580 | tree specargs = CLASSTYPE_TI_ARGS (type); | |
f9a7ae04 | 2581 | tree inner_args = INNERMOST_TEMPLATE_ARGS (specargs); |
6c30752f MM |
2582 | tree inner_parms = INNERMOST_TEMPLATE_PARMS (current_template_parms); |
2583 | tree main_inner_parms = DECL_INNERMOST_TEMPLATE_PARMS (maintmpl); | |
2584 | int nargs = TREE_VEC_LENGTH (inner_args); | |
2585 | int ntparms = TREE_VEC_LENGTH (inner_parms); | |
2586 | int i; | |
2587 | int did_error_intro = 0; | |
6c30752f MM |
2588 | struct template_parm_data tpd; |
2589 | struct template_parm_data tpd2; | |
2590 | ||
6c30752f MM |
2591 | /* We check that each of the template parameters given in the |
2592 | partial specialization is used in the argument list to the | |
2593 | specialization. For example: | |
2594 | ||
2595 | template <class T> struct S; | |
2596 | template <class T> struct S<T*>; | |
2597 | ||
2598 | The second declaration is OK because `T*' uses the template | |
2599 | parameter T, whereas | |
2600 | ||
2601 | template <class T> struct S<int>; | |
2602 | ||
2603 | is no good. Even trickier is: | |
2604 | ||
2605 | template <class T> | |
2606 | struct S1 | |
2607 | { | |
2608 | template <class U> | |
2609 | struct S2; | |
2610 | template <class U> | |
2611 | struct S2<T>; | |
2612 | }; | |
2613 | ||
0e339752 | 2614 | The S2<T> declaration is actually invalid; it is a |
c8094d83 | 2615 | full-specialization. Of course, |
6c30752f MM |
2616 | |
2617 | template <class U> | |
2618 | struct S2<T (*)(U)>; | |
2619 | ||
2620 | or some such would have been OK. */ | |
2621 | tpd.level = TMPL_PARMS_DEPTH (current_template_parms); | |
2622 | tpd.parms = alloca (sizeof (int) * ntparms); | |
fad205ff | 2623 | memset (tpd.parms, 0, sizeof (int) * ntparms); |
6c30752f MM |
2624 | |
2625 | tpd.arg_uses_template_parms = alloca (sizeof (int) * nargs); | |
fad205ff | 2626 | memset (tpd.arg_uses_template_parms, 0, sizeof (int) * nargs); |
6c30752f MM |
2627 | for (i = 0; i < nargs; ++i) |
2628 | { | |
2629 | tpd.current_arg = i; | |
2630 | for_each_template_parm (TREE_VEC_ELT (inner_args, i), | |
2631 | &mark_template_parm, | |
4f2c9d7e MM |
2632 | &tpd, |
2633 | NULL); | |
6c30752f MM |
2634 | } |
2635 | for (i = 0; i < ntparms; ++i) | |
2636 | if (tpd.parms[i] == 0) | |
2637 | { | |
2638 | /* One of the template parms was not used in the | |
f9a7ae04 | 2639 | specialization. */ |
6c30752f MM |
2640 | if (!did_error_intro) |
2641 | { | |
33bd39a2 | 2642 | error ("template parameters not used in partial specialization:"); |
6c30752f MM |
2643 | did_error_intro = 1; |
2644 | } | |
2645 | ||
0f51ccfc | 2646 | error (" %qD", TREE_VALUE (TREE_VEC_ELT (inner_parms, i))); |
6c30752f MM |
2647 | } |
2648 | ||
2649 | /* [temp.class.spec] | |
2650 | ||
2651 | The argument list of the specialization shall not be identical to | |
2652 | the implicit argument list of the primary template. */ | |
c8094d83 MS |
2653 | if (comp_template_args |
2654 | (inner_args, | |
f9a7ae04 MM |
2655 | INNERMOST_TEMPLATE_ARGS (CLASSTYPE_TI_ARGS (TREE_TYPE |
2656 | (maintmpl))))) | |
0f51ccfc | 2657 | error ("partial specialization %qT does not specialize any template arguments", type); |
6c30752f MM |
2658 | |
2659 | /* [temp.class.spec] | |
2660 | ||
2661 | A partially specialized non-type argument expression shall not | |
2662 | involve template parameters of the partial specialization except | |
2663 | when the argument expression is a simple identifier. | |
2664 | ||
2665 | The type of a template parameter corresponding to a specialized | |
2666 | non-type argument shall not be dependent on a parameter of the | |
2667 | specialization. */ | |
50bc768d | 2668 | gcc_assert (nargs == DECL_NTPARMS (maintmpl)); |
6c30752f MM |
2669 | tpd2.parms = 0; |
2670 | for (i = 0; i < nargs; ++i) | |
2671 | { | |
2672 | tree arg = TREE_VEC_ELT (inner_args, i); | |
2673 | if (/* These first two lines are the `non-type' bit. */ | |
2f939d94 | 2674 | !TYPE_P (arg) |
6c30752f MM |
2675 | && TREE_CODE (arg) != TEMPLATE_DECL |
2676 | /* This next line is the `argument expression is not just a | |
2677 | simple identifier' condition and also the `specialized | |
2678 | non-type argument' bit. */ | |
2679 | && TREE_CODE (arg) != TEMPLATE_PARM_INDEX) | |
2680 | { | |
2681 | if (tpd.arg_uses_template_parms[i]) | |
0f51ccfc | 2682 | error ("template argument %qE involves template parameter(s)", arg); |
c8094d83 | 2683 | else |
6c30752f MM |
2684 | { |
2685 | /* Look at the corresponding template parameter, | |
2686 | marking which template parameters its type depends | |
2687 | upon. */ | |
c8094d83 MS |
2688 | tree type = |
2689 | TREE_TYPE (TREE_VALUE (TREE_VEC_ELT (main_inner_parms, | |
6c30752f MM |
2690 | i))); |
2691 | ||
2692 | if (!tpd2.parms) | |
2693 | { | |
2694 | /* We haven't yet initialized TPD2. Do so now. */ | |
c8094d83 | 2695 | tpd2.arg_uses_template_parms |
c68b0a84 | 2696 | = alloca (sizeof (int) * nargs); |
104bf76a | 2697 | /* The number of parameters here is the number in the |
76a83782 RH |
2698 | main template, which, as checked in the assertion |
2699 | above, is NARGS. */ | |
c68b0a84 | 2700 | tpd2.parms = alloca (sizeof (int) * nargs); |
c8094d83 | 2701 | tpd2.level = |
6c30752f MM |
2702 | TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (maintmpl)); |
2703 | } | |
2704 | ||
104bf76a | 2705 | /* Mark the template parameters. But this time, we're |
6c30752f MM |
2706 | looking for the template parameters of the main |
2707 | template, not in the specialization. */ | |
2708 | tpd2.current_arg = i; | |
2709 | tpd2.arg_uses_template_parms[i] = 0; | |
fad205ff | 2710 | memset (tpd2.parms, 0, sizeof (int) * nargs); |
6c30752f MM |
2711 | for_each_template_parm (type, |
2712 | &mark_template_parm, | |
4f2c9d7e MM |
2713 | &tpd2, |
2714 | NULL); | |
c8094d83 | 2715 | |
6c30752f MM |
2716 | if (tpd2.arg_uses_template_parms [i]) |
2717 | { | |
2718 | /* The type depended on some template parameters. | |
2719 | If they are fully specialized in the | |
2720 | specialization, that's OK. */ | |
2721 | int j; | |
2722 | for (j = 0; j < nargs; ++j) | |
2723 | if (tpd2.parms[j] != 0 | |
2724 | && tpd.arg_uses_template_parms [j]) | |
2725 | { | |
0f51ccfc | 2726 | error ("type %qT of template argument %qE depends " |
0cbd7506 MS |
2727 | "on template parameter(s)", |
2728 | type, | |
2729 | arg); | |
6c30752f MM |
2730 | break; |
2731 | } | |
2732 | } | |
2733 | } | |
2734 | } | |
2735 | } | |
2736 | ||
c8094d83 | 2737 | if (retrieve_specialization (maintmpl, specargs, |
c7222c02 | 2738 | /*class_specializations_p=*/true)) |
6c30752f MM |
2739 | /* We've already got this specialization. */ |
2740 | return decl; | |
2741 | ||
d8b64f80 | 2742 | DECL_TEMPLATE_SPECIALIZATIONS (maintmpl) |
e1b3e07d MM |
2743 | = tree_cons (inner_args, inner_parms, |
2744 | DECL_TEMPLATE_SPECIALIZATIONS (maintmpl)); | |
6c30752f MM |
2745 | TREE_TYPE (DECL_TEMPLATE_SPECIALIZATIONS (maintmpl)) = type; |
2746 | return decl; | |
2747 | } | |
2748 | ||
6ba89f8e MM |
2749 | /* Check that a template declaration's use of default arguments is not |
2750 | invalid. Here, PARMS are the template parameters. IS_PRIMARY is | |
838dfd8a KH |
2751 | nonzero if DECL is the thing declared by a primary template. |
2752 | IS_PARTIAL is nonzero if DECL is a partial specialization. */ | |
6ba89f8e MM |
2753 | |
2754 | static void | |
3a978d72 | 2755 | check_default_tmpl_args (tree decl, tree parms, int is_primary, int is_partial) |
6ba89f8e | 2756 | { |
d8e178a0 | 2757 | const char *msg; |
66191c20 MM |
2758 | int last_level_to_check; |
2759 | tree parm_level; | |
6ba89f8e | 2760 | |
c8094d83 | 2761 | /* [temp.param] |
6ba89f8e MM |
2762 | |
2763 | A default template-argument shall not be specified in a | |
2764 | function template declaration or a function template definition, nor | |
2765 | in the template-parameter-list of the definition of a member of a | |
2766 | class template. */ | |
2767 | ||
4f1c5b7d | 2768 | if (TREE_CODE (CP_DECL_CONTEXT (decl)) == FUNCTION_DECL) |
e0942dcd MM |
2769 | /* You can't have a function template declaration in a local |
2770 | scope, nor you can you define a member of a class template in a | |
2771 | local scope. */ | |
2772 | return; | |
2773 | ||
6ba89f8e MM |
2774 | if (current_class_type |
2775 | && !TYPE_BEING_DEFINED (current_class_type) | |
3d7de1fa | 2776 | && DECL_LANG_SPECIFIC (decl) |
5937a6f9 MM |
2777 | /* If this is either a friend defined in the scope of the class |
2778 | or a member function. */ | |
6df5158a NS |
2779 | && (DECL_FUNCTION_MEMBER_P (decl) |
2780 | ? same_type_p (DECL_CONTEXT (decl), current_class_type) | |
2781 | : DECL_FRIEND_CONTEXT (decl) | |
2782 | ? same_type_p (DECL_FRIEND_CONTEXT (decl), current_class_type) | |
2783 | : false) | |
5937a6f9 MM |
2784 | /* And, if it was a member function, it really was defined in |
2785 | the scope of the class. */ | |
6df5158a NS |
2786 | && (!DECL_FUNCTION_MEMBER_P (decl) |
2787 | || DECL_INITIALIZED_IN_CLASS_P (decl))) | |
6ba89f8e | 2788 | /* We already checked these parameters when the template was |
5937a6f9 MM |
2789 | declared, so there's no need to do it again now. This function |
2790 | was defined in class scope, but we're processing it's body now | |
2791 | that the class is complete. */ | |
6ba89f8e MM |
2792 | return; |
2793 | ||
66191c20 | 2794 | /* [temp.param] |
c8094d83 | 2795 | |
66191c20 MM |
2796 | If a template-parameter has a default template-argument, all |
2797 | subsequent template-parameters shall have a default | |
2798 | template-argument supplied. */ | |
2799 | for (parm_level = parms; parm_level; parm_level = TREE_CHAIN (parm_level)) | |
2800 | { | |
2801 | tree inner_parms = TREE_VALUE (parm_level); | |
2802 | int ntparms = TREE_VEC_LENGTH (inner_parms); | |
c8094d83 | 2803 | int seen_def_arg_p = 0; |
66191c20 MM |
2804 | int i; |
2805 | ||
c8094d83 | 2806 | for (i = 0; i < ntparms; ++i) |
66191c20 MM |
2807 | { |
2808 | tree parm = TREE_VEC_ELT (inner_parms, i); | |
2809 | if (TREE_PURPOSE (parm)) | |
2810 | seen_def_arg_p = 1; | |
2811 | else if (seen_def_arg_p) | |
2812 | { | |
0f51ccfc | 2813 | error ("no default argument for %qD", TREE_VALUE (parm)); |
66191c20 MM |
2814 | /* For better subsequent error-recovery, we indicate that |
2815 | there should have been a default argument. */ | |
2816 | TREE_PURPOSE (parm) = error_mark_node; | |
2817 | } | |
2818 | } | |
2819 | } | |
2820 | ||
6ba89f8e MM |
2821 | if (TREE_CODE (decl) != TYPE_DECL || is_partial || !is_primary) |
2822 | /* For an ordinary class template, default template arguments are | |
2823 | allowed at the innermost level, e.g.: | |
0cbd7506 | 2824 | template <class T = int> |
6ba89f8e MM |
2825 | struct S {}; |
2826 | but, in a partial specialization, they're not allowed even | |
2827 | there, as we have in [temp.class.spec]: | |
c8094d83 | 2828 | |
6ba89f8e | 2829 | The template parameter list of a specialization shall not |
c8094d83 | 2830 | contain default template argument values. |
6ba89f8e MM |
2831 | |
2832 | So, for a partial specialization, or for a function template, | |
2833 | we look at all of them. */ | |
2834 | ; | |
2835 | else | |
2836 | /* But, for a primary class template that is not a partial | |
2837 | specialization we look at all template parameters except the | |
2838 | innermost ones. */ | |
2839 | parms = TREE_CHAIN (parms); | |
2840 | ||
2841 | /* Figure out what error message to issue. */ | |
2842 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
8653a2c3 | 2843 | msg = "default template arguments may not be used in function templates"; |
6ba89f8e | 2844 | else if (is_partial) |
8653a2c3 | 2845 | msg = "default template arguments may not be used in partial specializations"; |
6ba89f8e | 2846 | else |
0f51ccfc | 2847 | msg = "default argument for template parameter for class enclosing %qD"; |
6ba89f8e MM |
2848 | |
2849 | if (current_class_type && TYPE_BEING_DEFINED (current_class_type)) | |
2850 | /* If we're inside a class definition, there's no need to | |
104bf76a | 2851 | examine the parameters to the class itself. On the one |
6ba89f8e | 2852 | hand, they will be checked when the class is defined, and, |
0e339752 | 2853 | on the other, default arguments are valid in things like: |
0cbd7506 MS |
2854 | template <class T = double> |
2855 | struct S { template <class U> void f(U); }; | |
6ba89f8e MM |
2856 | Here the default argument for `S' has no bearing on the |
2857 | declaration of `f'. */ | |
2858 | last_level_to_check = template_class_depth (current_class_type) + 1; | |
2859 | else | |
2860 | /* Check everything. */ | |
2861 | last_level_to_check = 0; | |
2862 | ||
c8094d83 MS |
2863 | for (parm_level = parms; |
2864 | parm_level && TMPL_PARMS_DEPTH (parm_level) >= last_level_to_check; | |
66191c20 | 2865 | parm_level = TREE_CHAIN (parm_level)) |
6ba89f8e | 2866 | { |
66191c20 MM |
2867 | tree inner_parms = TREE_VALUE (parm_level); |
2868 | int i; | |
2869 | int ntparms; | |
6ba89f8e MM |
2870 | |
2871 | ntparms = TREE_VEC_LENGTH (inner_parms); | |
c8094d83 | 2872 | for (i = 0; i < ntparms; ++i) |
6ba89f8e MM |
2873 | if (TREE_PURPOSE (TREE_VEC_ELT (inner_parms, i))) |
2874 | { | |
2875 | if (msg) | |
2876 | { | |
33bd39a2 | 2877 | error (msg, decl); |
6ba89f8e MM |
2878 | msg = 0; |
2879 | } | |
2880 | ||
2881 | /* Clear out the default argument so that we are not | |
2882 | confused later. */ | |
2883 | TREE_PURPOSE (TREE_VEC_ELT (inner_parms, i)) = NULL_TREE; | |
2884 | } | |
2885 | ||
2886 | /* At this point, if we're still interested in issuing messages, | |
2887 | they must apply to classes surrounding the object declared. */ | |
2888 | if (msg) | |
c8094d83 | 2889 | msg = "default argument for template parameter for class enclosing %qD"; |
6ba89f8e MM |
2890 | } |
2891 | } | |
2892 | ||
5dd236e2 NS |
2893 | /* Worker for push_template_decl_real, called via |
2894 | for_each_template_parm. DATA is really an int, indicating the | |
2895 | level of the parameters we are interested in. If T is a template | |
838dfd8a | 2896 | parameter of that level, return nonzero. */ |
5dd236e2 NS |
2897 | |
2898 | static int | |
3a978d72 | 2899 | template_parm_this_level_p (tree t, void* data) |
5dd236e2 | 2900 | { |
6e04241f | 2901 | int this_level = *(int *)data; |
5dd236e2 NS |
2902 | int level; |
2903 | ||
2904 | if (TREE_CODE (t) == TEMPLATE_PARM_INDEX) | |
2905 | level = TEMPLATE_PARM_LEVEL (t); | |
2906 | else | |
2907 | level = TEMPLATE_TYPE_LEVEL (t); | |
2908 | return level == this_level; | |
2909 | } | |
2910 | ||
3ac3d9ea | 2911 | /* Creates a TEMPLATE_DECL for the indicated DECL using the template |
f84b4be9 JM |
2912 | parameters given by current_template_args, or reuses a |
2913 | previously existing one, if appropriate. Returns the DECL, or an | |
c8094d83 | 2914 | equivalent one, if it is replaced via a call to duplicate_decls. |
6757edfe | 2915 | |
d63d5d0c | 2916 | If IS_FRIEND is true, DECL is a friend declaration. */ |
3ac3d9ea MM |
2917 | |
2918 | tree | |
d63d5d0c | 2919 | push_template_decl_real (tree decl, bool is_friend) |
9a3b49ac MS |
2920 | { |
2921 | tree tmpl; | |
f84b4be9 | 2922 | tree args; |
9a3b49ac | 2923 | tree info; |
f84b4be9 JM |
2924 | tree ctx; |
2925 | int primary; | |
6ba89f8e | 2926 | int is_partial; |
cfe507be | 2927 | int new_template_p = 0; |
c7222c02 MM |
2928 | /* True if the template is a member template, in the sense of |
2929 | [temp.mem]. */ | |
2930 | bool member_template_p = false; | |
6ba89f8e | 2931 | |
c0694c4b MM |
2932 | if (decl == error_mark_node) |
2933 | return decl; | |
2934 | ||
6ba89f8e | 2935 | /* See if this is a partial specialization. */ |
9188c363 | 2936 | is_partial = (DECL_IMPLICIT_TYPEDEF_P (decl) |
6ba89f8e | 2937 | && TREE_CODE (TREE_TYPE (decl)) != ENUMERAL_TYPE |
370af2d5 | 2938 | && CLASSTYPE_TEMPLATE_SPECIALIZATION (TREE_TYPE (decl))); |
6757edfe | 2939 | |
d63d5d0c ILT |
2940 | if (TREE_CODE (decl) == FUNCTION_DECL && DECL_FRIEND_P (decl)) |
2941 | is_friend = true; | |
f84b4be9 JM |
2942 | |
2943 | if (is_friend) | |
2944 | /* For a friend, we want the context of the friend function, not | |
2945 | the type of which it is a friend. */ | |
2946 | ctx = DECL_CONTEXT (decl); | |
4f1c5b7d MM |
2947 | else if (CP_DECL_CONTEXT (decl) |
2948 | && TREE_CODE (CP_DECL_CONTEXT (decl)) != NAMESPACE_DECL) | |
f84b4be9 JM |
2949 | /* In the case of a virtual function, we want the class in which |
2950 | it is defined. */ | |
4f1c5b7d | 2951 | ctx = CP_DECL_CONTEXT (decl); |
f84b4be9 | 2952 | else |
dc957d14 | 2953 | /* Otherwise, if we're currently defining some class, the DECL |
f84b4be9 | 2954 | is assumed to be a member of the class. */ |
9188c363 | 2955 | ctx = current_scope (); |
f84b4be9 | 2956 | |
2c73f9f5 ML |
2957 | if (ctx && TREE_CODE (ctx) == NAMESPACE_DECL) |
2958 | ctx = NULL_TREE; | |
2959 | ||
2960 | if (!DECL_CONTEXT (decl)) | |
cb0dbb9a | 2961 | DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace); |
2c73f9f5 | 2962 | |
6ba89f8e | 2963 | /* See if this is a primary template. */ |
74b846e0 | 2964 | primary = template_parm_scope_p (); |
9a3b49ac | 2965 | |
83566abf JM |
2966 | if (primary) |
2967 | { | |
c7222c02 MM |
2968 | if (DECL_CLASS_SCOPE_P (decl)) |
2969 | member_template_p = true; | |
83566abf | 2970 | if (current_lang_name == lang_name_c) |
33bd39a2 | 2971 | error ("template with C linkage"); |
c8094d83 MS |
2972 | else if (TREE_CODE (decl) == TYPE_DECL |
2973 | && ANON_AGGRNAME_P (DECL_NAME (decl))) | |
33bd39a2 | 2974 | error ("template class without a name"); |
717a7d5d | 2975 | else if (TREE_CODE (decl) == FUNCTION_DECL) |
4b0d3cbe | 2976 | { |
717a7d5d MM |
2977 | if (DECL_DESTRUCTOR_P (decl)) |
2978 | { | |
2979 | /* [temp.mem] | |
c8094d83 | 2980 | |
0cbd7506 | 2981 | A destructor shall not be a member template. */ |
0f51ccfc | 2982 | error ("destructor %qD declared as member template", decl); |
717a7d5d MM |
2983 | return error_mark_node; |
2984 | } | |
2985 | if (NEW_DELETE_OPNAME_P (DECL_NAME (decl)) | |
2986 | && (!TYPE_ARG_TYPES (TREE_TYPE (decl)) | |
2987 | || TYPE_ARG_TYPES (TREE_TYPE (decl)) == void_list_node | |
2988 | || !TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (decl))) | |
2989 | || (TREE_CHAIN (TYPE_ARG_TYPES ((TREE_TYPE (decl)))) | |
2990 | == void_list_node))) | |
2991 | { | |
c8094d83 | 2992 | /* [basic.stc.dynamic.allocation] |
717a7d5d | 2993 | |
0cbd7506 | 2994 | An allocation function can be a function |
717a7d5d MM |
2995 | template. ... Template allocation functions shall |
2996 | have two or more parameters. */ | |
0f51ccfc | 2997 | error ("invalid template declaration of %qD", decl); |
717a7d5d MM |
2998 | return decl; |
2999 | } | |
4b0d3cbe | 3000 | } |
8ca4bf25 MM |
3001 | else if (DECL_IMPLICIT_TYPEDEF_P (decl) |
3002 | && CLASS_TYPE_P (TREE_TYPE (decl))) | |
2aaf816d JM |
3003 | /* OK */; |
3004 | else | |
11325dcd | 3005 | { |
0f51ccfc | 3006 | error ("template declaration of %q#D", decl); |
11325dcd KL |
3007 | return error_mark_node; |
3008 | } | |
83566abf JM |
3009 | } |
3010 | ||
6ba89f8e MM |
3011 | /* Check to see that the rules regarding the use of default |
3012 | arguments are not being violated. */ | |
c8094d83 | 3013 | check_default_tmpl_args (decl, current_template_parms, |
6ba89f8e | 3014 | primary, is_partial); |
73aad9b9 | 3015 | |
6ba89f8e MM |
3016 | if (is_partial) |
3017 | return process_partial_specialization (decl); | |
d32789d8 | 3018 | |
9a3b49ac MS |
3019 | args = current_template_args (); |
3020 | ||
c8094d83 | 3021 | if (!ctx |
f84b4be9 | 3022 | || TREE_CODE (ctx) == FUNCTION_DECL |
a723baf1 | 3023 | || (CLASS_TYPE_P (ctx) && TYPE_BEING_DEFINED (ctx)) |
f84b4be9 | 3024 | || (is_friend && !DECL_TEMPLATE_INFO (decl))) |
8d08fdba | 3025 | { |
75650646 | 3026 | if (DECL_LANG_SPECIFIC (decl) |
f84b4be9 JM |
3027 | && DECL_TEMPLATE_INFO (decl) |
3028 | && DECL_TI_TEMPLATE (decl)) | |
3029 | tmpl = DECL_TI_TEMPLATE (decl); | |
1c10870d AS |
3030 | /* If DECL is a TYPE_DECL for a class-template, then there won't |
3031 | be DECL_LANG_SPECIFIC. The information equivalent to | |
3032 | DECL_TEMPLATE_INFO is found in TYPE_TEMPLATE_INFO instead. */ | |
c8094d83 | 3033 | else if (DECL_IMPLICIT_TYPEDEF_P (decl) |
1c10870d AS |
3034 | && TYPE_TEMPLATE_INFO (TREE_TYPE (decl)) |
3035 | && TYPE_TI_TEMPLATE (TREE_TYPE (decl))) | |
3036 | { | |
3037 | /* Since a template declaration already existed for this | |
3038 | class-type, we must be redeclaring it here. Make sure | |
0e339752 | 3039 | that the redeclaration is valid. */ |
1c10870d AS |
3040 | redeclare_class_template (TREE_TYPE (decl), |
3041 | current_template_parms); | |
3042 | /* We don't need to create a new TEMPLATE_DECL; just use the | |
3043 | one we already had. */ | |
3044 | tmpl = TYPE_TI_TEMPLATE (TREE_TYPE (decl)); | |
3045 | } | |
f84b4be9 | 3046 | else |
786b5245 | 3047 | { |
c7222c02 MM |
3048 | tmpl = build_template_decl (decl, current_template_parms, |
3049 | member_template_p); | |
cfe507be MM |
3050 | new_template_p = 1; |
3051 | ||
f84b4be9 JM |
3052 | if (DECL_LANG_SPECIFIC (decl) |
3053 | && DECL_TEMPLATE_SPECIALIZATION (decl)) | |
3054 | { | |
3055 | /* A specialization of a member template of a template | |
c6002625 | 3056 | class. */ |
f84b4be9 JM |
3057 | SET_DECL_TEMPLATE_SPECIALIZATION (tmpl); |
3058 | DECL_TEMPLATE_INFO (tmpl) = DECL_TEMPLATE_INFO (decl); | |
3059 | DECL_TEMPLATE_INFO (decl) = NULL_TREE; | |
3060 | } | |
786b5245 | 3061 | } |
8d08fdba MS |
3062 | } |
3063 | else | |
3064 | { | |
e1a5ccf7 | 3065 | tree a, t, current, parms; |
ba4f4e5d | 3066 | int i; |
6633d636 | 3067 | |
6b9ab5cc MM |
3068 | if (TREE_CODE (decl) == TYPE_DECL) |
3069 | { | |
ed44da02 MM |
3070 | if ((IS_AGGR_TYPE_CODE (TREE_CODE (TREE_TYPE (decl))) |
3071 | || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE) | |
3072 | && TYPE_TEMPLATE_INFO (TREE_TYPE (decl)) | |
3073 | && TYPE_TI_TEMPLATE (TREE_TYPE (decl))) | |
3074 | tmpl = TYPE_TI_TEMPLATE (TREE_TYPE (decl)); | |
6b9ab5cc MM |
3075 | else |
3076 | { | |
0f51ccfc | 3077 | error ("%qD does not declare a template type", decl); |
6b9ab5cc MM |
3078 | return decl; |
3079 | } | |
3080 | } | |
f3368a90 | 3081 | else if (!DECL_LANG_SPECIFIC (decl) || !DECL_TEMPLATE_INFO (decl)) |
c91a56d2 | 3082 | { |
0f51ccfc | 3083 | error ("template definition of non-template %q#D", decl); |
3ac3d9ea | 3084 | return decl; |
c91a56d2 | 3085 | } |
8d08fdba | 3086 | else |
5566b478 | 3087 | tmpl = DECL_TI_TEMPLATE (decl); |
c8094d83 | 3088 | |
c353b8e3 | 3089 | if (DECL_FUNCTION_TEMPLATE_P (tmpl) |
c8094d83 | 3090 | && DECL_TEMPLATE_INFO (decl) && DECL_TI_ARGS (decl) |
c353b8e3 | 3091 | && DECL_TEMPLATE_SPECIALIZATION (decl) |
c7222c02 | 3092 | && DECL_MEMBER_TEMPLATE_P (tmpl)) |
98c1c668 | 3093 | { |
e1a5ccf7 JM |
3094 | tree new_tmpl; |
3095 | ||
3096 | /* The declaration is a specialization of a member | |
3097 | template, declared outside the class. Therefore, the | |
3098 | innermost template arguments will be NULL, so we | |
3099 | replace them with the arguments determined by the | |
3100 | earlier call to check_explicit_specialization. */ | |
3101 | args = DECL_TI_ARGS (decl); | |
3102 | ||
c8094d83 | 3103 | new_tmpl |
c7222c02 MM |
3104 | = build_template_decl (decl, current_template_parms, |
3105 | member_template_p); | |
e1a5ccf7 JM |
3106 | DECL_TEMPLATE_RESULT (new_tmpl) = decl; |
3107 | TREE_TYPE (new_tmpl) = TREE_TYPE (decl); | |
3108 | DECL_TI_TEMPLATE (decl) = new_tmpl; | |
3109 | SET_DECL_TEMPLATE_SPECIALIZATION (new_tmpl); | |
c8094d83 | 3110 | DECL_TEMPLATE_INFO (new_tmpl) |
e1b3e07d | 3111 | = tree_cons (tmpl, args, NULL_TREE); |
e1a5ccf7 | 3112 | |
c8094d83 MS |
3113 | register_specialization (new_tmpl, |
3114 | most_general_template (tmpl), | |
d63d5d0c ILT |
3115 | args, |
3116 | is_friend); | |
e1a5ccf7 | 3117 | return decl; |
98c1c668 | 3118 | } |
98c1c668 | 3119 | |
e1a5ccf7 | 3120 | /* Make sure the template headers we got make sense. */ |
6633d636 | 3121 | |
e1a5ccf7 JM |
3122 | parms = DECL_TEMPLATE_PARMS (tmpl); |
3123 | i = TMPL_PARMS_DEPTH (parms); | |
3124 | if (TMPL_ARGS_DEPTH (args) != i) | |
98c1c668 | 3125 | { |
0f51ccfc | 3126 | error ("expected %d levels of template parms for %q#D, got %d", |
0cbd7506 | 3127 | i, decl, TMPL_ARGS_DEPTH (args)); |
98c1c668 | 3128 | } |
e1a5ccf7 JM |
3129 | else |
3130 | for (current = decl; i > 0; --i, parms = TREE_CHAIN (parms)) | |
3131 | { | |
3132 | a = TMPL_ARGS_LEVEL (args, i); | |
3133 | t = INNERMOST_TEMPLATE_PARMS (parms); | |
3134 | ||
3135 | if (TREE_VEC_LENGTH (t) != TREE_VEC_LENGTH (a)) | |
3136 | { | |
3137 | if (current == decl) | |
0f51ccfc | 3138 | error ("got %d template parameters for %q#D", |
0cbd7506 | 3139 | TREE_VEC_LENGTH (a), decl); |
e1a5ccf7 | 3140 | else |
0f51ccfc | 3141 | error ("got %d template parameters for %q#T", |
0cbd7506 | 3142 | TREE_VEC_LENGTH (a), current); |
33bd39a2 | 3143 | error (" but %d required", TREE_VEC_LENGTH (t)); |
f1cc0515 | 3144 | return error_mark_node; |
e1a5ccf7 | 3145 | } |
98c1c668 | 3146 | |
e1a5ccf7 | 3147 | /* Perhaps we should also check that the parms are used in the |
0cbd7506 | 3148 | appropriate qualifying scopes in the declarator? */ |
6633d636 | 3149 | |
e1a5ccf7 JM |
3150 | if (current == decl) |
3151 | current = ctx; | |
3152 | else | |
3153 | current = TYPE_CONTEXT (current); | |
3154 | } | |
5566b478 | 3155 | } |
8d08fdba | 3156 | |
5566b478 MS |
3157 | DECL_TEMPLATE_RESULT (tmpl) = decl; |
3158 | TREE_TYPE (tmpl) = TREE_TYPE (decl); | |
8d08fdba | 3159 | |
36a117a5 MM |
3160 | /* Push template declarations for global functions and types. Note |
3161 | that we do not try to push a global template friend declared in a | |
3162 | template class; such a thing may well depend on the template | |
39c01e4c | 3163 | parameters of the class. */ |
c8094d83 | 3164 | if (new_template_p && !ctx |
36a117a5 | 3165 | && !(is_friend && template_class_depth (current_class_type) > 0)) |
c6f9f83b | 3166 | { |
d63d5d0c | 3167 | tmpl = pushdecl_namespace_level (tmpl, is_friend); |
c6f9f83b KL |
3168 | if (tmpl == error_mark_node) |
3169 | return error_mark_node; | |
bd3d082e KL |
3170 | |
3171 | /* Hide template friend classes that haven't been declared yet. */ | |
3172 | if (is_friend && TREE_CODE (decl) == TYPE_DECL) | |
3173 | { | |
3174 | DECL_ANTICIPATED (tmpl) = 1; | |
3175 | DECL_FRIEND_P (tmpl) = 1; | |
3176 | } | |
c6f9f83b | 3177 | } |
8d08fdba | 3178 | |
5566b478 | 3179 | if (primary) |
5dd236e2 NS |
3180 | { |
3181 | DECL_PRIMARY_TEMPLATE (tmpl) = tmpl; | |
3182 | if (DECL_CONV_FN_P (tmpl)) | |
3183 | { | |
6e04241f GS |
3184 | int depth = TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (tmpl)); |
3185 | ||
5dd236e2 NS |
3186 | /* It is a conversion operator. See if the type converted to |
3187 | depends on innermost template operands. */ | |
c8094d83 | 3188 | |
d43f603d KL |
3189 | if (uses_template_parms_level (TREE_TYPE (TREE_TYPE (tmpl)), |
3190 | depth)) | |
5dd236e2 NS |
3191 | DECL_TEMPLATE_CONV_FN_P (tmpl) = 1; |
3192 | } | |
3193 | } | |
5566b478 | 3194 | |
a692ad2e | 3195 | /* The DECL_TI_ARGS of DECL contains full set of arguments referring |
28ba38e3 KL |
3196 | back to its most general template. If TMPL is a specialization, |
3197 | ARGS may only have the innermost set of arguments. Add the missing | |
3198 | argument levels if necessary. */ | |
3199 | if (DECL_TEMPLATE_INFO (tmpl)) | |
3200 | args = add_outermost_template_args (DECL_TI_ARGS (tmpl), args); | |
3201 | ||
e1b3e07d | 3202 | info = tree_cons (tmpl, args, NULL_TREE); |
5566b478 | 3203 | |
9188c363 | 3204 | if (DECL_IMPLICIT_TYPEDEF_P (decl)) |
8d08fdba | 3205 | { |
ed44da02 MM |
3206 | SET_TYPE_TEMPLATE_INFO (TREE_TYPE (tmpl), info); |
3207 | if ((!ctx || TREE_CODE (ctx) != FUNCTION_DECL) | |
b60ecc04 MM |
3208 | && TREE_CODE (TREE_TYPE (decl)) != ENUMERAL_TYPE |
3209 | /* Don't change the name if we've already set it up. */ | |
3210 | && !IDENTIFIER_TEMPLATE (DECL_NAME (decl))) | |
75650646 | 3211 | DECL_NAME (decl) = classtype_mangled_name (TREE_TYPE (decl)); |
51c184be | 3212 | } |
2aaf816d | 3213 | else if (DECL_LANG_SPECIFIC (decl)) |
5566b478 | 3214 | DECL_TEMPLATE_INFO (decl) = info; |
3ac3d9ea MM |
3215 | |
3216 | return DECL_TEMPLATE_RESULT (tmpl); | |
8d08fdba MS |
3217 | } |
3218 | ||
6757edfe | 3219 | tree |
3a978d72 | 3220 | push_template_decl (tree decl) |
6757edfe | 3221 | { |
d63d5d0c | 3222 | return push_template_decl_real (decl, false); |
6757edfe MM |
3223 | } |
3224 | ||
3225 | /* Called when a class template TYPE is redeclared with the indicated | |
3226 | template PARMS, e.g.: | |
7fe6899f MM |
3227 | |
3228 | template <class T> struct S; | |
3229 | template <class T> struct S {}; */ | |
3230 | ||
c8094d83 | 3231 | void |
3a978d72 | 3232 | redeclare_class_template (tree type, tree parms) |
7fe6899f | 3233 | { |
3d7de1fa | 3234 | tree tmpl; |
6757edfe | 3235 | tree tmpl_parms; |
7fe6899f MM |
3236 | int i; |
3237 | ||
3d7de1fa MM |
3238 | if (!TYPE_TEMPLATE_INFO (type)) |
3239 | { | |
0f51ccfc | 3240 | error ("%qT is not a template type", type); |
3d7de1fa MM |
3241 | return; |
3242 | } | |
3243 | ||
3244 | tmpl = TYPE_TI_TEMPLATE (type); | |
7fe6899f MM |
3245 | if (!PRIMARY_TEMPLATE_P (tmpl)) |
3246 | /* The type is nested in some template class. Nothing to worry | |
3247 | about here; there are no new template parameters for the nested | |
3248 | type. */ | |
3249 | return; | |
3250 | ||
ee921ddf MM |
3251 | if (!parms) |
3252 | { | |
3253 | error ("template specifiers not specified in declaration of %qD", | |
3254 | tmpl); | |
3255 | return; | |
3256 | } | |
3257 | ||
6757edfe MM |
3258 | parms = INNERMOST_TEMPLATE_PARMS (parms); |
3259 | tmpl_parms = DECL_INNERMOST_TEMPLATE_PARMS (tmpl); | |
3260 | ||
7fe6899f MM |
3261 | if (TREE_VEC_LENGTH (parms) != TREE_VEC_LENGTH (tmpl_parms)) |
3262 | { | |
dee15844 | 3263 | error ("previous declaration %q+D", tmpl); |
f49d8c52 | 3264 | error ("used %d template parameter(s) instead of %d", |
c8094d83 | 3265 | TREE_VEC_LENGTH (tmpl_parms), |
f49d8c52 | 3266 | TREE_VEC_LENGTH (parms)); |
7fe6899f MM |
3267 | return; |
3268 | } | |
3269 | ||
3270 | for (i = 0; i < TREE_VEC_LENGTH (tmpl_parms); ++i) | |
3271 | { | |
3272 | tree tmpl_parm = TREE_VALUE (TREE_VEC_ELT (tmpl_parms, i)); | |
3273 | tree parm = TREE_VALUE (TREE_VEC_ELT (parms, i)); | |
3274 | tree tmpl_default = TREE_PURPOSE (TREE_VEC_ELT (tmpl_parms, i)); | |
3275 | tree parm_default = TREE_PURPOSE (TREE_VEC_ELT (parms, i)); | |
3276 | ||
2649701f KL |
3277 | /* TMPL_PARM and PARM can be either TYPE_DECL, PARM_DECL, or |
3278 | TEMPLATE_DECL. */ | |
3279 | if (TREE_CODE (tmpl_parm) != TREE_CODE (parm) | |
3280 | || (TREE_CODE (tmpl_parm) != TYPE_DECL | |
3281 | && !same_type_p (TREE_TYPE (tmpl_parm), TREE_TYPE (parm)))) | |
7fe6899f | 3282 | { |
dee15844 | 3283 | error ("template parameter %q+#D", tmpl_parm); |
0f51ccfc | 3284 | error ("redeclared here as %q#D", parm); |
7fe6899f MM |
3285 | return; |
3286 | } | |
3287 | ||
3288 | if (tmpl_default != NULL_TREE && parm_default != NULL_TREE) | |
3289 | { | |
3290 | /* We have in [temp.param]: | |
3291 | ||
3292 | A template-parameter may not be given default arguments | |
3293 | by two different declarations in the same scope. */ | |
0f51ccfc | 3294 | error ("redefinition of default argument for %q#D", parm); |
ddd2d57e | 3295 | error ("%J original definition appeared here", tmpl_parm); |
7fe6899f MM |
3296 | return; |
3297 | } | |
3298 | ||
3299 | if (parm_default != NULL_TREE) | |
3300 | /* Update the previous template parameters (which are the ones | |
3301 | that will really count) with the new default value. */ | |
3302 | TREE_PURPOSE (TREE_VEC_ELT (tmpl_parms, i)) = parm_default; | |
7ce74c5e MM |
3303 | else if (tmpl_default != NULL_TREE) |
3304 | /* Update the new parameters, too; they'll be used as the | |
3305 | parameters for any members. */ | |
3306 | TREE_PURPOSE (TREE_VEC_ELT (parms, i)) = tmpl_default; | |
7fe6899f MM |
3307 | } |
3308 | } | |
75650646 | 3309 | |
9baa27a9 MM |
3310 | /* Simplify EXPR if it is a non-dependent expression. Returns the |
3311 | (possibly simplified) expression. */ | |
3312 | ||
3313 | tree | |
3314 | fold_non_dependent_expr (tree expr) | |
3315 | { | |
3316 | /* If we're in a template, but EXPR isn't value dependent, simplify | |
3317 | it. We're supposed to treat: | |
c8094d83 | 3318 | |
9baa27a9 MM |
3319 | template <typename T> void f(T[1 + 1]); |
3320 | template <typename T> void f(T[2]); | |
c8094d83 | 3321 | |
9baa27a9 MM |
3322 | as two declarations of the same function, for example. */ |
3323 | if (processing_template_decl | |
3324 | && !type_dependent_expression_p (expr) | |
7416ab02 | 3325 | && !value_dependent_expression_p (expr)) |
9baa27a9 MM |
3326 | { |
3327 | HOST_WIDE_INT saved_processing_template_decl; | |
3328 | ||
3329 | saved_processing_template_decl = processing_template_decl; | |
3330 | processing_template_decl = 0; | |
3331 | expr = tsubst_copy_and_build (expr, | |
3332 | /*args=*/NULL_TREE, | |
3333 | tf_error, | |
3334 | /*in_decl=*/NULL_TREE, | |
3335 | /*function_p=*/false); | |
3336 | processing_template_decl = saved_processing_template_decl; | |
3337 | } | |
3338 | return expr; | |
3339 | } | |
3340 | ||
b6ab6892 GB |
3341 | /* EXPR is an expression which is used in a constant-expression context. |
3342 | For instance, it could be a VAR_DECL with a constant initializer. | |
3343 | Extract the innest constant expression. | |
c8094d83 | 3344 | |
8a784e4a NS |
3345 | This is basically a more powerful version of |
3346 | integral_constant_value, which can be used also in templates where | |
3347 | initializers can maintain a syntactic rather than semantic form | |
3348 | (even if they are non-dependent, for access-checking purposes). */ | |
b6ab6892 GB |
3349 | |
3350 | tree | |
3351 | fold_decl_constant_value (tree expr) | |
3352 | { | |
4ef69b83 GB |
3353 | tree const_expr = expr; |
3354 | do | |
b6ab6892 | 3355 | { |
b6ab6892 | 3356 | expr = fold_non_dependent_expr (const_expr); |
4ef69b83 | 3357 | const_expr = integral_constant_value (expr); |
b6ab6892 | 3358 | } |
4ef69b83 | 3359 | while (expr != const_expr); |
b6ab6892 | 3360 | |
8a784e4a | 3361 | return expr; |
b6ab6892 GB |
3362 | } |
3363 | ||
3364 | /* Subroutine of convert_nontype_argument. Converts EXPR to TYPE, which | |
3365 | must be a function or a pointer-to-function type, as specified | |
3366 | in [temp.arg.nontype]: disambiguate EXPR if it is an overload set, | |
3367 | and check that the resulting function has external linkage. */ | |
3368 | ||
3369 | static tree | |
3370 | convert_nontype_argument_function (tree type, tree expr) | |
3371 | { | |
3372 | tree fns = expr; | |
3373 | tree fn, fn_no_ptr; | |
3374 | ||
3375 | fn = instantiate_type (type, fns, tf_none); | |
3376 | if (fn == error_mark_node) | |
3377 | return error_mark_node; | |
3378 | ||
3379 | fn_no_ptr = fn; | |
3380 | if (TREE_CODE (fn_no_ptr) == ADDR_EXPR) | |
3381 | fn_no_ptr = TREE_OPERAND (fn_no_ptr, 0); | |
3382 | ||
3383 | /* [temp.arg.nontype]/1 | |
3384 | ||
3385 | A template-argument for a non-type, non-template template-parameter | |
3386 | shall be one of: | |
3387 | [...] | |
3388 | -- the address of an object or function with external linkage. */ | |
3389 | if (!DECL_EXTERNAL_LINKAGE_P (fn_no_ptr)) | |
3390 | { | |
3391 | error ("%qE is not a valid template argument for type %qT " | |
3392 | "because function %qD has not external linkage", | |
3393 | expr, type, fn_no_ptr); | |
3394 | return NULL_TREE; | |
3395 | } | |
3396 | ||
3397 | return fn; | |
3398 | } | |
3399 | ||
75650646 MM |
3400 | /* Attempt to convert the non-type template parameter EXPR to the |
3401 | indicated TYPE. If the conversion is successful, return the | |
dc957d14 | 3402 | converted value. If the conversion is unsuccessful, return |
75650646 MM |
3403 | NULL_TREE if we issued an error message, or error_mark_node if we |
3404 | did not. We issue error messages for out-and-out bad template | |
3405 | parameters, but not simply because the conversion failed, since we | |
9baa27a9 | 3406 | might be just trying to do argument deduction. Both TYPE and EXPR |
b6ab6892 GB |
3407 | must be non-dependent. |
3408 | ||
3409 | The conversion follows the special rules described in | |
3410 | [temp.arg.nontype], and it is much more strict than an implicit | |
3411 | conversion. | |
3412 | ||
3413 | This function is called twice for each template argument (see | |
3414 | lookup_template_class for a more accurate description of this | |
3415 | problem). This means that we need to handle expressions which | |
3416 | are not valid in a C++ source, but can be created from the | |
3417 | first call (for instance, casts to perform conversions). These | |
3418 | hacks can go away after we fix the double coercion problem. */ | |
75650646 MM |
3419 | |
3420 | static tree | |
3a978d72 | 3421 | convert_nontype_argument (tree type, tree expr) |
75650646 | 3422 | { |
9baa27a9 MM |
3423 | tree expr_type; |
3424 | ||
b6ab6892 GB |
3425 | /* Detect immediately string literals as invalid non-type argument. |
3426 | This special-case is not needed for correctness (we would easily | |
3427 | catch this later), but only to provide better diagnostic for this | |
3428 | common user mistake. As suggested by DR 100, we do not mention | |
3429 | linkage issues in the diagnostic as this is not the point. */ | |
3430 | if (TREE_CODE (expr) == STRING_CST) | |
3431 | { | |
3432 | error ("%qE is not a valid template argument for type %qT " | |
3433 | "because string literals can never be used in this context", | |
3434 | expr, type); | |
3435 | return NULL_TREE; | |
3436 | } | |
3437 | ||
9baa27a9 MM |
3438 | /* If we are in a template, EXPR may be non-dependent, but still |
3439 | have a syntactic, rather than semantic, form. For example, EXPR | |
3440 | might be a SCOPE_REF, rather than the VAR_DECL to which the | |
3441 | SCOPE_REF refers. Preserving the qualifying scope is necessary | |
3442 | so that access checking can be performed when the template is | |
3443 | instantiated -- but here we need the resolved form so that we can | |
3444 | convert the argument. */ | |
3445 | expr = fold_non_dependent_expr (expr); | |
3446 | expr_type = TREE_TYPE (expr); | |
75650646 | 3447 | |
b6ab6892 GB |
3448 | /* HACK: Due to double coercion, we can get a |
3449 | NOP_EXPR<REFERENCE_TYPE>(ADDR_EXPR<POINTER_TYPE> (arg)) here, | |
3450 | which is the tree that we built on the first call (see | |
3451 | below when coercing to reference to object or to reference to | |
3452 | function). We just strip everything and get to the arg. | |
3453 | See g++.old-deja/g++.oliva/template4.C and g++.dg/template/nontype9.C | |
3454 | for examples. */ | |
3455 | if (TREE_CODE (expr) == NOP_EXPR) | |
75650646 | 3456 | { |
b6ab6892 | 3457 | if (TYPE_REF_OBJ_P (type) || TYPE_REFFN_P (type)) |
75650646 | 3458 | { |
b6ab6892 GB |
3459 | /* ??? Maybe we could use convert_from_reference here, but we |
3460 | would need to relax its constraints because the NOP_EXPR | |
3461 | could actually change the type to something more cv-qualified, | |
3462 | and this is not folded by convert_from_reference. */ | |
3463 | tree addr = TREE_OPERAND (expr, 0); | |
3464 | gcc_assert (TREE_CODE (expr_type) == REFERENCE_TYPE); | |
3465 | gcc_assert (TREE_CODE (addr) == ADDR_EXPR); | |
3466 | gcc_assert (TREE_CODE (TREE_TYPE (addr)) == POINTER_TYPE); | |
3467 | gcc_assert (same_type_ignoring_top_level_qualifiers_p | |
3468 | (TREE_TYPE (expr_type), | |
3469 | TREE_TYPE (TREE_TYPE (addr)))); | |
3470 | ||
3471 | expr = TREE_OPERAND (addr, 0); | |
3472 | expr_type = TREE_TYPE (expr); | |
75650646 MM |
3473 | } |
3474 | ||
b6ab6892 GB |
3475 | /* We could also generate a NOP_EXPR(ADDR_EXPR()) when the |
3476 | parameter is a pointer to object, through decay and | |
3477 | qualification conversion. Let's strip everything. */ | |
3478 | else if (TYPE_PTROBV_P (type)) | |
75650646 | 3479 | { |
b6ab6892 GB |
3480 | STRIP_NOPS (expr); |
3481 | gcc_assert (TREE_CODE (expr) == ADDR_EXPR); | |
3482 | gcc_assert (TREE_CODE (TREE_TYPE (expr)) == POINTER_TYPE); | |
3483 | /* Skip the ADDR_EXPR only if it is part of the decay for | |
3484 | an array. Otherwise, it is part of the original argument | |
3485 | in the source code. */ | |
3486 | if (TREE_CODE (TREE_TYPE (TREE_OPERAND (expr, 0))) == ARRAY_TYPE) | |
3487 | expr = TREE_OPERAND (expr, 0); | |
3488 | expr_type = TREE_TYPE (expr); | |
f3400fe2 | 3489 | } |
75650646 | 3490 | } |
c61dce3a | 3491 | |
b6ab6892 | 3492 | /* [temp.arg.nontype]/5, bullet 1 |
75650646 | 3493 | |
b6ab6892 GB |
3494 | For a non-type template-parameter of integral or enumeration type, |
3495 | integral promotions (_conv.prom_) and integral conversions | |
3496 | (_conv.integral_) are applied. */ | |
3497 | if (INTEGRAL_TYPE_P (type)) | |
75650646 | 3498 | { |
75650646 MM |
3499 | if (!INTEGRAL_TYPE_P (expr_type)) |
3500 | return error_mark_node; | |
fddabb2c | 3501 | |
b6ab6892 GB |
3502 | expr = fold_decl_constant_value (expr); |
3503 | /* Notice that there are constant expressions like '4 % 0' which | |
3504 | do not fold into integer constants. */ | |
db02b6b9 | 3505 | if (TREE_CODE (expr) != INTEGER_CST) |
b6ab6892 GB |
3506 | { |
3507 | error ("%qE is not a valid template argument for type %qT " | |
3508 | "because it is a non-constant expression", expr, type); | |
3509 | return NULL_TREE; | |
3510 | } | |
75650646 | 3511 | |
b6ab6892 GB |
3512 | /* At this point, an implicit conversion does what we want, |
3513 | because we already know that the expression is of integral | |
3514 | type. */ | |
3515 | expr = ocp_convert (type, expr, CONV_IMPLICIT, LOOKUP_PROTECT); | |
3516 | if (expr == error_mark_node) | |
3517 | return error_mark_node; | |
75650646 | 3518 | |
b6ab6892 GB |
3519 | /* Conversion was allowed: fold it to a bare integer constant. */ |
3520 | expr = fold (expr); | |
3521 | } | |
3522 | /* [temp.arg.nontype]/5, bullet 2 | |
75650646 | 3523 | |
b6ab6892 GB |
3524 | For a non-type template-parameter of type pointer to object, |
3525 | qualification conversions (_conv.qual_) and the array-to-pointer | |
3526 | conversion (_conv.array_) are applied. */ | |
3527 | else if (TYPE_PTROBV_P (type)) | |
3528 | { | |
3529 | /* [temp.arg.nontype]/1 (TC1 version, DR 49): | |
75650646 | 3530 | |
b6ab6892 GB |
3531 | A template-argument for a non-type, non-template template-parameter |
3532 | shall be one of: [...] | |
75650646 | 3533 | |
b6ab6892 GB |
3534 | -- the name of a non-type template-parameter; |
3535 | -- the address of an object or function with external linkage, [...] | |
3536 | expressed as "& id-expression" where the & is optional if the name | |
3537 | refers to a function or array, or if the corresponding | |
3538 | template-parameter is a reference. | |
c8094d83 | 3539 | |
b6ab6892 GB |
3540 | Here, we do not care about functions, as they are invalid anyway |
3541 | for a parameter of type pointer-to-object. */ | |
3542 | bool constant_address_p = | |
3543 | (TREE_CODE (expr) == ADDR_EXPR | |
3544 | || TREE_CODE (expr_type) == ARRAY_TYPE | |
3545 | || (DECL_P (expr) && DECL_TEMPLATE_PARM_P (expr))); | |
3546 | ||
3547 | expr = decay_conversion (expr); | |
3548 | if (expr == error_mark_node) | |
3549 | return error_mark_node; | |
75650646 | 3550 | |
b6ab6892 GB |
3551 | expr = perform_qualification_conversions (type, expr); |
3552 | if (expr == error_mark_node) | |
3553 | return error_mark_node; | |
0dc09a61 | 3554 | |
b6ab6892 GB |
3555 | if (!constant_address_p) |
3556 | { | |
3557 | error ("%qE is not a valid template argument for type %qT " | |
3558 | "because it is not a constant pointer", expr, type); | |
3559 | return NULL_TREE; | |
3560 | } | |
3561 | } | |
3562 | /* [temp.arg.nontype]/5, bullet 3 | |
3563 | ||
3564 | For a non-type template-parameter of type reference to object, no | |
3565 | conversions apply. The type referred to by the reference may be more | |
3566 | cv-qualified than the (otherwise identical) type of the | |
3567 | template-argument. The template-parameter is bound directly to the | |
3568 | template-argument, which must be an lvalue. */ | |
3569 | else if (TYPE_REF_OBJ_P (type)) | |
3570 | { | |
3571 | if (!same_type_ignoring_top_level_qualifiers_p (TREE_TYPE (type), | |
3572 | expr_type)) | |
3573 | return error_mark_node; | |
75650646 | 3574 | |
b6ab6892 GB |
3575 | if (!at_least_as_qualified_p (TREE_TYPE (type), expr_type)) |
3576 | { | |
3577 | error ("%qE is not a valid template argument for type %qT " | |
3578 | "because of conflicts in cv-qualification", expr, type); | |
3579 | return NULL_TREE; | |
3580 | } | |
c8094d83 | 3581 | |
b6ab6892 GB |
3582 | if (!real_lvalue_p (expr)) |
3583 | { | |
3584 | error ("%qE is not a valid template argument for type %qT " | |
0cbd7506 | 3585 | "because it is not a lvalue", expr, type); |
b6ab6892 GB |
3586 | return NULL_TREE; |
3587 | } | |
e6e174e5 | 3588 | |
b6ab6892 | 3589 | /* [temp.arg.nontype]/1 |
75650646 | 3590 | |
b6ab6892 GB |
3591 | A template-argument for a non-type, non-template template-parameter |
3592 | shall be one of: [...] | |
75650646 | 3593 | |
03fd3f84 | 3594 | -- the address of an object or function with external linkage. */ |
b6ab6892 GB |
3595 | if (!DECL_EXTERNAL_LINKAGE_P (expr)) |
3596 | { | |
3597 | error ("%qE is not a valid template argument for type %qT " | |
3598 | "because object %qD has not external linkage", | |
3599 | expr, type, expr); | |
3600 | return NULL_TREE; | |
3601 | } | |
0dc09a61 | 3602 | |
b6ab6892 GB |
3603 | expr = build_nop (type, build_address (expr)); |
3604 | } | |
3605 | /* [temp.arg.nontype]/5, bullet 4 | |
3606 | ||
3607 | For a non-type template-parameter of type pointer to function, only | |
3608 | the function-to-pointer conversion (_conv.func_) is applied. If the | |
3609 | template-argument represents a set of overloaded functions (or a | |
3610 | pointer to such), the matching function is selected from the set | |
3611 | (_over.over_). */ | |
3612 | else if (TYPE_PTRFN_P (type)) | |
3613 | { | |
3614 | /* If the argument is a template-id, we might not have enough | |
2c164de6 | 3615 | context information to decay the pointer. */ |
b6ab6892 GB |
3616 | if (!type_unknown_p (expr_type)) |
3617 | { | |
3618 | expr = decay_conversion (expr); | |
3619 | if (expr == error_mark_node) | |
3620 | return error_mark_node; | |
3621 | } | |
75650646 | 3622 | |
b6ab6892 GB |
3623 | expr = convert_nontype_argument_function (type, expr); |
3624 | if (!expr || expr == error_mark_node) | |
3625 | return expr; | |
3626 | } | |
3627 | /* [temp.arg.nontype]/5, bullet 5 | |
75650646 | 3628 | |
b6ab6892 GB |
3629 | For a non-type template-parameter of type reference to function, no |
3630 | conversions apply. If the template-argument represents a set of | |
3631 | overloaded functions, the matching function is selected from the set | |
3632 | (_over.over_). */ | |
3633 | else if (TYPE_REFFN_P (type)) | |
3634 | { | |
3635 | if (TREE_CODE (expr) == ADDR_EXPR) | |
3636 | { | |
3637 | error ("%qE is not a valid template argument for type %qT " | |
3638 | "because it is a pointer", expr, type); | |
3639 | inform ("try using %qE instead", TREE_OPERAND (expr, 0)); | |
3640 | return NULL_TREE; | |
3641 | } | |
75650646 | 3642 | |
b6ab6892 GB |
3643 | expr = convert_nontype_argument_function (TREE_TYPE (type), expr); |
3644 | if (!expr || expr == error_mark_node) | |
3645 | return expr; | |
75650646 | 3646 | |
7866705a | 3647 | expr = build_nop (type, build_address (expr)); |
b6ab6892 GB |
3648 | } |
3649 | /* [temp.arg.nontype]/5, bullet 6 | |
75650646 | 3650 | |
b6ab6892 GB |
3651 | For a non-type template-parameter of type pointer to member function, |
3652 | no conversions apply. If the template-argument represents a set of | |
3653 | overloaded member functions, the matching member function is selected | |
3654 | from the set (_over.over_). */ | |
3655 | else if (TYPE_PTRMEMFUNC_P (type)) | |
3656 | { | |
3657 | expr = instantiate_type (type, expr, tf_none); | |
3658 | if (expr == error_mark_node) | |
3659 | return error_mark_node; | |
75650646 | 3660 | |
b6ab6892 GB |
3661 | /* There is no way to disable standard conversions in |
3662 | resolve_address_of_overloaded_function (called by | |
3663 | instantiate_type). It is possible that the call succeeded by | |
3664 | converting &B::I to &D::I (where B is a base of D), so we need | |
3665 | to reject this conversion here. | |
75650646 | 3666 | |
b6ab6892 GB |
3667 | Actually, even if there was a way to disable standard conversions, |
3668 | it would still be better to reject them here so that we can | |
3669 | provide a superior diagnostic. */ | |
3670 | if (!same_type_p (TREE_TYPE (expr), type)) | |
3671 | { | |
3672 | /* Make sure we are just one standard conversion off. */ | |
3673 | gcc_assert (can_convert (type, TREE_TYPE (expr))); | |
3674 | error ("%qE is not a valid template argument for type %qT " | |
3675 | "because it is of type %qT", expr, type, | |
3676 | TREE_TYPE (expr)); | |
3677 | inform ("standard conversions are not allowed in this context"); | |
3678 | return NULL_TREE; | |
3679 | } | |
3680 | } | |
3681 | /* [temp.arg.nontype]/5, bullet 7 | |
59e7a901 | 3682 | |
b6ab6892 GB |
3683 | For a non-type template-parameter of type pointer to data member, |
3684 | qualification conversions (_conv.qual_) are applied. */ | |
3685 | else if (TYPE_PTRMEM_P (type)) | |
3686 | { | |
3687 | expr = perform_qualification_conversions (type, expr); | |
3688 | if (expr == error_mark_node) | |
75650646 | 3689 | return expr; |
75650646 | 3690 | } |
b6ab6892 GB |
3691 | /* A template non-type parameter must be one of the above. */ |
3692 | else | |
3693 | gcc_unreachable (); | |
75650646 | 3694 | |
b6ab6892 GB |
3695 | /* Sanity check: did we actually convert the argument to the |
3696 | right type? */ | |
3697 | gcc_assert (same_type_p (type, TREE_TYPE (expr))); | |
3698 | return expr; | |
75650646 MM |
3699 | } |
3700 | ||
b6ab6892 | 3701 | |
c8094d83 MS |
3702 | /* Return 1 if PARM_PARMS and ARG_PARMS matches using rule for |
3703 | template template parameters. Both PARM_PARMS and ARG_PARMS are | |
3704 | vectors of TREE_LIST nodes containing TYPE_DECL, TEMPLATE_DECL | |
744fac59 | 3705 | or PARM_DECL. |
c8094d83 MS |
3706 | |
3707 | ARG_PARMS may contain more parameters than PARM_PARMS. If this is | |
744fac59 KL |
3708 | the case, then extra parameters must have default arguments. |
3709 | ||
3710 | Consider the example: | |
3711 | template <class T, class Allocator = allocator> class vector; | |
3712 | template<template <class U> class TT> class C; | |
3713 | ||
c8094d83 MS |
3714 | C<vector> is a valid instantiation. PARM_PARMS for the above code |
3715 | contains a TYPE_DECL (for U), ARG_PARMS contains two TYPE_DECLs (for | |
3716 | T and Allocator) and OUTER_ARGS contains the argument that is used to | |
744fac59 KL |
3717 | substitute the TT parameter. */ |
3718 | ||
3719 | static int | |
c8094d83 | 3720 | coerce_template_template_parms (tree parm_parms, |
0cbd7506 MS |
3721 | tree arg_parms, |
3722 | tsubst_flags_t complain, | |
3a978d72 | 3723 | tree in_decl, |
0cbd7506 | 3724 | tree outer_args) |
744fac59 KL |
3725 | { |
3726 | int nparms, nargs, i; | |
3727 | tree parm, arg; | |
3728 | ||
50bc768d NS |
3729 | gcc_assert (TREE_CODE (parm_parms) == TREE_VEC); |
3730 | gcc_assert (TREE_CODE (arg_parms) == TREE_VEC); | |
744fac59 KL |
3731 | |
3732 | nparms = TREE_VEC_LENGTH (parm_parms); | |
3733 | nargs = TREE_VEC_LENGTH (arg_parms); | |
3734 | ||
3735 | /* The rule here is opposite of coerce_template_parms. */ | |
3736 | if (nargs < nparms | |
3737 | || (nargs > nparms | |
3738 | && TREE_PURPOSE (TREE_VEC_ELT (arg_parms, nparms)) == NULL_TREE)) | |
3739 | return 0; | |
3740 | ||
3741 | for (i = 0; i < nparms; ++i) | |
3742 | { | |
3743 | parm = TREE_VALUE (TREE_VEC_ELT (parm_parms, i)); | |
3744 | arg = TREE_VALUE (TREE_VEC_ELT (arg_parms, i)); | |
3745 | ||
3746 | if (arg == NULL_TREE || arg == error_mark_node | |
0cbd7506 | 3747 | || parm == NULL_TREE || parm == error_mark_node) |
744fac59 KL |
3748 | return 0; |
3749 | ||
3750 | if (TREE_CODE (arg) != TREE_CODE (parm)) | |
0cbd7506 | 3751 | return 0; |
744fac59 KL |
3752 | |
3753 | switch (TREE_CODE (parm)) | |
3754 | { | |
3755 | case TYPE_DECL: | |
3756 | break; | |
3757 | ||
3758 | case TEMPLATE_DECL: | |
3759 | /* We encounter instantiations of templates like | |
3760 | template <template <template <class> class> class TT> | |
3761 | class C; */ | |
700466c2 JM |
3762 | { |
3763 | tree parmparm = DECL_INNERMOST_TEMPLATE_PARMS (parm); | |
3764 | tree argparm = DECL_INNERMOST_TEMPLATE_PARMS (arg); | |
3765 | ||
8c6ab2db NS |
3766 | if (!coerce_template_template_parms |
3767 | (parmparm, argparm, complain, in_decl, outer_args)) | |
700466c2 JM |
3768 | return 0; |
3769 | } | |
3770 | break; | |
744fac59 KL |
3771 | |
3772 | case PARM_DECL: | |
3773 | /* The tsubst call is used to handle cases such as | |
00bdb87f KL |
3774 | |
3775 | template <int> class C {}; | |
3776 | template <class T, template <T> class TT> class D {}; | |
3777 | D<int, C> d; | |
3778 | ||
744fac59 | 3779 | i.e. the parameter list of TT depends on earlier parameters. */ |
00bdb87f KL |
3780 | if (!dependent_type_p (TREE_TYPE (arg)) |
3781 | && !same_type_p | |
3782 | (tsubst (TREE_TYPE (parm), outer_args, complain, in_decl), | |
3783 | TREE_TYPE (arg))) | |
744fac59 KL |
3784 | return 0; |
3785 | break; | |
c8094d83 | 3786 | |
744fac59 | 3787 | default: |
315fb5db | 3788 | gcc_unreachable (); |
744fac59 KL |
3789 | } |
3790 | } | |
3791 | return 1; | |
3792 | } | |
3793 | ||
8b5b8b7c MM |
3794 | /* Convert the indicated template ARG as necessary to match the |
3795 | indicated template PARM. Returns the converted ARG, or | |
c2ea3a40 NS |
3796 | error_mark_node if the conversion was unsuccessful. Error and |
3797 | warning messages are issued under control of COMPLAIN. This | |
3798 | conversion is for the Ith parameter in the parameter list. ARGS is | |
3799 | the full set of template arguments deduced so far. */ | |
8b5b8b7c MM |
3800 | |
3801 | static tree | |
c8094d83 | 3802 | convert_template_argument (tree parm, |
0cbd7506 MS |
3803 | tree arg, |
3804 | tree args, | |
3805 | tsubst_flags_t complain, | |
3806 | int i, | |
3807 | tree in_decl) | |
8b5b8b7c MM |
3808 | { |
3809 | tree val; | |
3810 | tree inner_args; | |
3811 | int is_type, requires_type, is_tmpl_type, requires_tmpl_type; | |
c8094d83 | 3812 | |
f9a7ae04 | 3813 | inner_args = INNERMOST_TEMPLATE_ARGS (args); |
8b5b8b7c | 3814 | |
c8094d83 | 3815 | if (TREE_CODE (arg) == TREE_LIST |
a5ac359a | 3816 | && TREE_CODE (TREE_VALUE (arg)) == OFFSET_REF) |
c8094d83 | 3817 | { |
8b5b8b7c MM |
3818 | /* The template argument was the name of some |
3819 | member function. That's usually | |
0e339752 | 3820 | invalid, but static members are OK. In any |
8b5b8b7c MM |
3821 | case, grab the underlying fields/functions |
3822 | and issue an error later if required. */ | |
3823 | arg = TREE_VALUE (arg); | |
3824 | TREE_TYPE (arg) = unknown_type_node; | |
3825 | } | |
3826 | ||
3827 | requires_tmpl_type = TREE_CODE (parm) == TEMPLATE_DECL; | |
3828 | requires_type = (TREE_CODE (parm) == TYPE_DECL | |
3829 | || requires_tmpl_type); | |
3830 | ||
cbd63935 KL |
3831 | is_tmpl_type = ((TREE_CODE (arg) == TEMPLATE_DECL |
3832 | && TREE_CODE (DECL_TEMPLATE_RESULT (arg)) == TYPE_DECL) | |
3833 | || TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM | |
3834 | || TREE_CODE (arg) == UNBOUND_CLASS_TEMPLATE); | |
c8094d83 | 3835 | |
b8c6534b KL |
3836 | if (is_tmpl_type |
3837 | && (TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM | |
3838 | || TREE_CODE (arg) == UNBOUND_CLASS_TEMPLATE)) | |
8b5b8b7c | 3839 | arg = TYPE_STUB_DECL (arg); |
8b5b8b7c | 3840 | |
2f939d94 | 3841 | is_type = TYPE_P (arg) || is_tmpl_type; |
8b5b8b7c MM |
3842 | |
3843 | if (requires_type && ! is_type && TREE_CODE (arg) == SCOPE_REF | |
3844 | && TREE_CODE (TREE_OPERAND (arg, 0)) == TEMPLATE_TYPE_PARM) | |
3845 | { | |
0f51ccfc | 3846 | pedwarn ("to refer to a type member of a template parameter, " |
0cbd7506 | 3847 | "use %<typename %E%>", arg); |
c8094d83 | 3848 | |
8b5b8b7c | 3849 | arg = make_typename_type (TREE_OPERAND (arg, 0), |
3baa501d | 3850 | TREE_OPERAND (arg, 1), |
fc6a28d7 | 3851 | typename_type, |
c2ea3a40 | 3852 | complain & tf_error); |
8b5b8b7c MM |
3853 | is_type = 1; |
3854 | } | |
3855 | if (is_type != requires_type) | |
3856 | { | |
3857 | if (in_decl) | |
3858 | { | |
c2ea3a40 | 3859 | if (complain & tf_error) |
8b5b8b7c | 3860 | { |
0f51ccfc | 3861 | error ("type/value mismatch at argument %d in template " |
0cbd7506 MS |
3862 | "parameter list for %qD", |
3863 | i + 1, in_decl); | |
8b5b8b7c | 3864 | if (is_type) |
0f51ccfc | 3865 | error (" expected a constant of type %qT, got %qT", |
0cbd7506 MS |
3866 | TREE_TYPE (parm), |
3867 | (is_tmpl_type ? DECL_NAME (arg) : arg)); | |
d12a7283 | 3868 | else if (requires_tmpl_type) |
0f51ccfc | 3869 | error (" expected a class template, got %qE", arg); |
8b5b8b7c | 3870 | else |
0f51ccfc | 3871 | error (" expected a type, got %qE", arg); |
8b5b8b7c MM |
3872 | } |
3873 | } | |
3874 | return error_mark_node; | |
3875 | } | |
3876 | if (is_tmpl_type ^ requires_tmpl_type) | |
3877 | { | |
c2ea3a40 | 3878 | if (in_decl && (complain & tf_error)) |
8b5b8b7c | 3879 | { |
0f51ccfc | 3880 | error ("type/value mismatch at argument %d in template " |
0cbd7506 MS |
3881 | "parameter list for %qD", |
3882 | i + 1, in_decl); | |
8b5b8b7c | 3883 | if (is_tmpl_type) |
0f51ccfc | 3884 | error (" expected a type, got %qT", DECL_NAME (arg)); |
8b5b8b7c | 3885 | else |
0f51ccfc | 3886 | error (" expected a class template, got %qT", arg); |
8b5b8b7c MM |
3887 | } |
3888 | return error_mark_node; | |
3889 | } | |
c8094d83 | 3890 | |
8b5b8b7c MM |
3891 | if (is_type) |
3892 | { | |
3893 | if (requires_tmpl_type) | |
3894 | { | |
b8c6534b KL |
3895 | if (TREE_CODE (TREE_TYPE (arg)) == UNBOUND_CLASS_TEMPLATE) |
3896 | /* The number of argument required is not known yet. | |
3897 | Just accept it for now. */ | |
3898 | val = TREE_TYPE (arg); | |
8b5b8b7c MM |
3899 | else |
3900 | { | |
b8c6534b KL |
3901 | tree parmparm = DECL_INNERMOST_TEMPLATE_PARMS (parm); |
3902 | tree argparm = DECL_INNERMOST_TEMPLATE_PARMS (arg); | |
3903 | ||
3904 | if (coerce_template_template_parms (parmparm, argparm, | |
3905 | complain, in_decl, | |
3906 | inner_args)) | |
8b5b8b7c | 3907 | { |
b8c6534b | 3908 | val = arg; |
c8094d83 MS |
3909 | |
3910 | /* TEMPLATE_TEMPLATE_PARM node is preferred over | |
b8c6534b | 3911 | TEMPLATE_DECL. */ |
c8094d83 | 3912 | if (val != error_mark_node |
b8c6534b KL |
3913 | && DECL_TEMPLATE_TEMPLATE_PARM_P (val)) |
3914 | val = TREE_TYPE (val); | |
8b5b8b7c | 3915 | } |
b8c6534b KL |
3916 | else |
3917 | { | |
c2ea3a40 | 3918 | if (in_decl && (complain & tf_error)) |
b8c6534b | 3919 | { |
0f51ccfc | 3920 | error ("type/value mismatch at argument %d in " |
0cbd7506 MS |
3921 | "template parameter list for %qD", |
3922 | i + 1, in_decl); | |
0f51ccfc | 3923 | error (" expected a template of type %qD, got %qD", |
0cbd7506 | 3924 | parm, arg); |
b8c6534b | 3925 | } |
c8094d83 | 3926 | |
b8c6534b KL |
3927 | val = error_mark_node; |
3928 | } | |
8b5b8b7c MM |
3929 | } |
3930 | } | |
3931 | else | |
058b15c1 | 3932 | val = arg; |
685e39c2 MM |
3933 | /* We only form one instance of each template specialization. |
3934 | Therefore, if we use a non-canonical variant (i.e., a | |
3935 | typedef), any future messages referring to the type will use | |
3936 | the typedef, which is confusing if those future uses do not | |
3937 | themselves also use the typedef. */ | |
3938 | if (TYPE_P (val)) | |
3939 | val = canonical_type_variant (val); | |
8b5b8b7c MM |
3940 | } |
3941 | else | |
3942 | { | |
4393e105 | 3943 | tree t = tsubst (TREE_TYPE (parm), args, complain, in_decl); |
8b5b8b7c | 3944 | |
11b810f1 | 3945 | if (invalid_nontype_parm_type_p (t, complain)) |
0cbd7506 | 3946 | return error_mark_node; |
c8094d83 | 3947 | |
d768a589 | 3948 | if (!uses_template_parms (arg) && !uses_template_parms (t)) |
8b5b8b7c MM |
3949 | /* We used to call digest_init here. However, digest_init |
3950 | will report errors, which we don't want when complain | |
3951 | is zero. More importantly, digest_init will try too | |
3952 | hard to convert things: for example, `0' should not be | |
3953 | converted to pointer type at this point according to | |
3954 | the standard. Accepting this is not merely an | |
3955 | extension, since deciding whether or not these | |
3956 | conversions can occur is part of determining which | |
dc957d14 | 3957 | function template to call, or whether a given explicit |
0e339752 | 3958 | argument specification is valid. */ |
8b5b8b7c MM |
3959 | val = convert_nontype_argument (t, arg); |
3960 | else | |
3961 | val = arg; | |
3962 | ||
3963 | if (val == NULL_TREE) | |
3964 | val = error_mark_node; | |
c2ea3a40 | 3965 | else if (val == error_mark_node && (complain & tf_error)) |
0f51ccfc | 3966 | error ("could not convert template argument %qE to %qT", arg, t); |
8b5b8b7c MM |
3967 | } |
3968 | ||
3969 | return val; | |
3970 | } | |
3971 | ||
3972 | /* Convert all template arguments to their appropriate types, and | |
3973 | return a vector containing the innermost resulting template | |
c2ea3a40 | 3974 | arguments. If any error occurs, return error_mark_node. Error and |
3e4a3562 | 3975 | warning messages are issued under control of COMPLAIN. |
75650646 | 3976 | |
838dfd8a | 3977 | If REQUIRE_ALL_ARGUMENTS is nonzero, all arguments must be |
75650646 MM |
3978 | provided in ARGLIST, or else trailing parameters must have default |
3979 | values. If REQUIRE_ALL_ARGUMENTS is zero, we will attempt argument | |
6dfbb909 | 3980 | deduction for any unspecified trailing arguments. */ |
c8094d83 | 3981 | |
8d08fdba | 3982 | static tree |
c8094d83 | 3983 | coerce_template_parms (tree parms, |
0cbd7506 MS |
3984 | tree args, |
3985 | tree in_decl, | |
3a978d72 NN |
3986 | tsubst_flags_t complain, |
3987 | int require_all_arguments) | |
8d08fdba | 3988 | { |
a292b002 | 3989 | int nparms, nargs, i, lost = 0; |
e4a84209 | 3990 | tree inner_args; |
8b5b8b7c MM |
3991 | tree new_args; |
3992 | tree new_inner_args; | |
a292b002 | 3993 | |
f9a7ae04 | 3994 | inner_args = INNERMOST_TEMPLATE_ARGS (args); |
bf12d54d | 3995 | nargs = inner_args ? NUM_TMPL_ARGS (inner_args) : 0; |
a292b002 MS |
3996 | nparms = TREE_VEC_LENGTH (parms); |
3997 | ||
3998 | if (nargs > nparms | |
3999 | || (nargs < nparms | |
75650646 | 4000 | && require_all_arguments |
a292b002 | 4001 | && TREE_PURPOSE (TREE_VEC_ELT (parms, nargs)) == NULL_TREE)) |
8d08fdba | 4002 | { |
c8094d83 | 4003 | if (complain & tf_error) |
75650646 | 4004 | { |
33bd39a2 | 4005 | error ("wrong number of template arguments (%d, should be %d)", |
0cbd7506 | 4006 | nargs, nparms); |
c8094d83 | 4007 | |
75650646 | 4008 | if (in_decl) |
dee15844 | 4009 | error ("provided for %q+D", in_decl); |
75650646 MM |
4010 | } |
4011 | ||
8d08fdba MS |
4012 | return error_mark_node; |
4013 | } | |
4014 | ||
f31c0a32 | 4015 | new_inner_args = make_tree_vec (nparms); |
8b5b8b7c MM |
4016 | new_args = add_outermost_template_args (args, new_inner_args); |
4017 | for (i = 0; i < nparms; i++) | |
8d08fdba | 4018 | { |
8b5b8b7c MM |
4019 | tree arg; |
4020 | tree parm; | |
e4a84209 | 4021 | |
8b5b8b7c MM |
4022 | /* Get the Ith template parameter. */ |
4023 | parm = TREE_VEC_ELT (parms, i); | |
75650646 | 4024 | |
8b5b8b7c | 4025 | /* Calculate the Ith argument. */ |
bf12d54d | 4026 | if (i < nargs) |
8b5b8b7c | 4027 | arg = TREE_VEC_ELT (inner_args, i); |
ffd49b19 | 4028 | else if (require_all_arguments) |
04c06002 | 4029 | /* There must be a default arg in this case. */ |
a91db711 NS |
4030 | arg = tsubst_template_arg (TREE_PURPOSE (parm), new_args, |
4031 | complain, in_decl); | |
ffd49b19 NS |
4032 | else |
4033 | break; | |
c8094d83 | 4034 | |
50bc768d | 4035 | gcc_assert (arg); |
ffd49b19 | 4036 | if (arg == error_mark_node) |
e34b0922 KL |
4037 | { |
4038 | if (complain & tf_error) | |
4039 | error ("template argument %d is invalid", i + 1); | |
4040 | } | |
c8094d83 MS |
4041 | else |
4042 | arg = convert_template_argument (TREE_VALUE (parm), | |
8b5b8b7c | 4043 | arg, new_args, complain, i, |
c8094d83 MS |
4044 | in_decl); |
4045 | ||
8b5b8b7c | 4046 | if (arg == error_mark_node) |
8d08fdba | 4047 | lost++; |
8b5b8b7c | 4048 | TREE_VEC_ELT (new_inner_args, i) = arg; |
8d08fdba | 4049 | } |
8b5b8b7c | 4050 | |
8d08fdba MS |
4051 | if (lost) |
4052 | return error_mark_node; | |
8b5b8b7c MM |
4053 | |
4054 | return new_inner_args; | |
8d08fdba MS |
4055 | } |
4056 | ||
34016c81 JM |
4057 | /* Returns 1 if template args OT and NT are equivalent. */ |
4058 | ||
d8e178a0 | 4059 | static int |
3a978d72 | 4060 | template_args_equal (tree ot, tree nt) |
34016c81 JM |
4061 | { |
4062 | if (nt == ot) | |
4063 | return 1; | |
74601d7c | 4064 | |
34016c81 JM |
4065 | if (TREE_CODE (nt) == TREE_VEC) |
4066 | /* For member templates */ | |
74601d7c KL |
4067 | return TREE_CODE (ot) == TREE_VEC && comp_template_args (ot, nt); |
4068 | else if (TYPE_P (nt)) | |
660845bf | 4069 | return TYPE_P (ot) && same_type_p (ot, nt); |
74601d7c KL |
4070 | else if (TREE_CODE (ot) == TREE_VEC || TYPE_P (ot)) |
4071 | return 0; | |
34016c81 | 4072 | else |
c8a209ca | 4073 | return cp_tree_equal (ot, nt); |
34016c81 JM |
4074 | } |
4075 | ||
4076 | /* Returns 1 iff the OLDARGS and NEWARGS are in fact identical sets | |
f84b4be9 JM |
4077 | of template arguments. Returns 0 otherwise. */ |
4078 | ||
6757edfe | 4079 | int |
3a978d72 | 4080 | comp_template_args (tree oldargs, tree newargs) |
5566b478 MS |
4081 | { |
4082 | int i; | |
4083 | ||
386b8a85 JM |
4084 | if (TREE_VEC_LENGTH (oldargs) != TREE_VEC_LENGTH (newargs)) |
4085 | return 0; | |
4086 | ||
5566b478 MS |
4087 | for (i = 0; i < TREE_VEC_LENGTH (oldargs); ++i) |
4088 | { | |
4089 | tree nt = TREE_VEC_ELT (newargs, i); | |
4090 | tree ot = TREE_VEC_ELT (oldargs, i); | |
4091 | ||
34016c81 | 4092 | if (! template_args_equal (ot, nt)) |
61a127b3 | 4093 | return 0; |
5566b478 MS |
4094 | } |
4095 | return 1; | |
4096 | } | |
4097 | ||
8d08fdba MS |
4098 | /* Given class template name and parameter list, produce a user-friendly name |
4099 | for the instantiation. */ | |
e92cc029 | 4100 | |
8d08fdba | 4101 | static char * |
3a978d72 | 4102 | mangle_class_name_for_template (const char* name, tree parms, tree arglist) |
8d08fdba MS |
4103 | { |
4104 | static struct obstack scratch_obstack; | |
4105 | static char *scratch_firstobj; | |
4106 | int i, nparms; | |
8d08fdba MS |
4107 | |
4108 | if (!scratch_firstobj) | |
fc378698 | 4109 | gcc_obstack_init (&scratch_obstack); |
8d08fdba MS |
4110 | else |
4111 | obstack_free (&scratch_obstack, scratch_firstobj); | |
fc378698 | 4112 | scratch_firstobj = obstack_alloc (&scratch_obstack, 1); |
8d08fdba | 4113 | |
18e314ad GS |
4114 | #define ccat(C) obstack_1grow (&scratch_obstack, (C)); |
4115 | #define cat(S) obstack_grow (&scratch_obstack, (S), strlen (S)) | |
8d08fdba MS |
4116 | |
4117 | cat (name); | |
4118 | ccat ('<'); | |
4119 | nparms = TREE_VEC_LENGTH (parms); | |
f9a7ae04 | 4120 | arglist = INNERMOST_TEMPLATE_ARGS (arglist); |
50bc768d | 4121 | gcc_assert (nparms == TREE_VEC_LENGTH (arglist)); |
8d08fdba MS |
4122 | for (i = 0; i < nparms; i++) |
4123 | { | |
a292b002 MS |
4124 | tree parm = TREE_VALUE (TREE_VEC_ELT (parms, i)); |
4125 | tree arg = TREE_VEC_ELT (arglist, i); | |
8d08fdba MS |
4126 | |
4127 | if (i) | |
4128 | ccat (','); | |
4129 | ||
a292b002 | 4130 | if (TREE_CODE (parm) == TYPE_DECL) |
8d08fdba | 4131 | { |
761f0855 | 4132 | cat (type_as_string (arg, TFF_CHASE_TYPEDEF)); |
8d08fdba MS |
4133 | continue; |
4134 | } | |
73b0fce8 KL |
4135 | else if (TREE_CODE (parm) == TEMPLATE_DECL) |
4136 | { | |
4137 | if (TREE_CODE (arg) == TEMPLATE_DECL) | |
2c73f9f5 | 4138 | { |
c8094d83 | 4139 | /* Already substituted with real template. Just output |
2c73f9f5 | 4140 | the template name here */ |
0cbd7506 MS |
4141 | tree context = DECL_CONTEXT (arg); |
4142 | if (context) | |
4143 | { | |
4144 | /* The template may be defined in a namespace, or | |
4145 | may be a member template. */ | |
4146 | gcc_assert (TREE_CODE (context) == NAMESPACE_DECL | |
50bc768d NS |
4147 | || CLASS_TYPE_P (context)); |
4148 | cat (decl_as_string (DECL_CONTEXT (arg), | |
4149 | TFF_PLAIN_IDENTIFIER)); | |
4150 | cat ("::"); | |
2c73f9f5 ML |
4151 | } |
4152 | cat (IDENTIFIER_POINTER (DECL_NAME (arg))); | |
4153 | } | |
73b0fce8 | 4154 | else |
f4f206f4 | 4155 | /* Output the parameter declaration. */ |
761f0855 | 4156 | cat (type_as_string (arg, TFF_CHASE_TYPEDEF)); |
73b0fce8 KL |
4157 | continue; |
4158 | } | |
8d08fdba | 4159 | else |
50bc768d | 4160 | gcc_assert (TREE_CODE (parm) == PARM_DECL); |
8d08fdba | 4161 | |
8d08fdba MS |
4162 | /* No need to check arglist against parmlist here; we did that |
4163 | in coerce_template_parms, called from lookup_template_class. */ | |
761f0855 | 4164 | cat (expr_as_string (arg, TFF_PLAIN_IDENTIFIER)); |
8d08fdba MS |
4165 | } |
4166 | { | |
4167 | char *bufp = obstack_next_free (&scratch_obstack); | |
4168 | int offset = 0; | |
4169 | while (bufp[offset - 1] == ' ') | |
4170 | offset--; | |
4171 | obstack_blank_fast (&scratch_obstack, offset); | |
4172 | ||
4173 | /* B<C<char> >, not B<C<char>> */ | |
4174 | if (bufp[offset - 1] == '>') | |
4175 | ccat (' '); | |
4176 | } | |
4177 | ccat ('>'); | |
4178 | ccat ('\0'); | |
4179 | return (char *) obstack_base (&scratch_obstack); | |
8d08fdba MS |
4180 | } |
4181 | ||
bd6dd845 | 4182 | static tree |
3a978d72 | 4183 | classtype_mangled_name (tree t) |
5566b478 MS |
4184 | { |
4185 | if (CLASSTYPE_TEMPLATE_INFO (t) | |
36a117a5 MM |
4186 | /* Specializations have already had their names set up in |
4187 | lookup_template_class. */ | |
370af2d5 | 4188 | && !CLASSTYPE_TEMPLATE_SPECIALIZATION (t)) |
9fbf56f7 MM |
4189 | { |
4190 | tree tmpl = most_general_template (CLASSTYPE_TI_TEMPLATE (t)); | |
4191 | ||
36a117a5 MM |
4192 | /* For non-primary templates, the template parameters are |
4193 | implicit from their surrounding context. */ | |
9fbf56f7 MM |
4194 | if (PRIMARY_TEMPLATE_P (tmpl)) |
4195 | { | |
4196 | tree name = DECL_NAME (tmpl); | |
4197 | char *mangled_name = mangle_class_name_for_template | |
c8094d83 | 4198 | (IDENTIFIER_POINTER (name), |
9fbf56f7 MM |
4199 | DECL_INNERMOST_TEMPLATE_PARMS (tmpl), |
4200 | CLASSTYPE_TI_ARGS (t)); | |
4201 | tree id = get_identifier (mangled_name); | |
4202 | IDENTIFIER_TEMPLATE (id) = name; | |
4203 | return id; | |
4204 | } | |
5566b478 | 4205 | } |
9fbf56f7 MM |
4206 | |
4207 | return TYPE_IDENTIFIER (t); | |
5566b478 MS |
4208 | } |
4209 | ||
4210 | static void | |
3a978d72 | 4211 | add_pending_template (tree d) |
5566b478 | 4212 | { |
3ae18eaf JM |
4213 | tree ti = (TYPE_P (d) |
4214 | ? CLASSTYPE_TEMPLATE_INFO (d) | |
4215 | : DECL_TEMPLATE_INFO (d)); | |
46ccf50a | 4216 | tree pt; |
3ae18eaf | 4217 | int level; |
e92cc029 | 4218 | |
824b9a4c | 4219 | if (TI_PENDING_TEMPLATE_FLAG (ti)) |
5566b478 MS |
4220 | return; |
4221 | ||
3ae18eaf JM |
4222 | /* We are called both from instantiate_decl, where we've already had a |
4223 | tinst_level pushed, and instantiate_template, where we haven't. | |
4224 | Compensate. */ | |
4225 | level = !(current_tinst_level && TINST_DECL (current_tinst_level) == d); | |
4226 | ||
4227 | if (level) | |
4228 | push_tinst_level (d); | |
4229 | ||
46ccf50a JM |
4230 | pt = tree_cons (current_tinst_level, d, NULL_TREE); |
4231 | if (last_pending_template) | |
4232 | TREE_CHAIN (last_pending_template) = pt; | |
4233 | else | |
4234 | pending_templates = pt; | |
4235 | ||
4236 | last_pending_template = pt; | |
4237 | ||
824b9a4c | 4238 | TI_PENDING_TEMPLATE_FLAG (ti) = 1; |
3ae18eaf JM |
4239 | |
4240 | if (level) | |
4241 | pop_tinst_level (); | |
5566b478 MS |
4242 | } |
4243 | ||
386b8a85 | 4244 | |
4ba126e4 MM |
4245 | /* Return a TEMPLATE_ID_EXPR corresponding to the indicated FNS and |
4246 | ARGLIST. Valid choices for FNS are given in the cp-tree.def | |
4247 | documentation for TEMPLATE_ID_EXPR. */ | |
386b8a85 JM |
4248 | |
4249 | tree | |
3a978d72 | 4250 | lookup_template_function (tree fns, tree arglist) |
386b8a85 | 4251 | { |
2c73f9f5 | 4252 | tree type; |
050367a3 | 4253 | |
4ba126e4 MM |
4254 | if (fns == error_mark_node || arglist == error_mark_node) |
4255 | return error_mark_node; | |
4256 | ||
50bc768d | 4257 | gcc_assert (!arglist || TREE_CODE (arglist) == TREE_VEC); |
4230cec2 NS |
4258 | gcc_assert (fns && (is_overloaded_fn (fns) |
4259 | || TREE_CODE (fns) == IDENTIFIER_NODE)); | |
4ba126e4 | 4260 | |
50ad9642 MM |
4261 | if (BASELINK_P (fns)) |
4262 | { | |
f293ce4b RS |
4263 | BASELINK_FUNCTIONS (fns) = build2 (TEMPLATE_ID_EXPR, |
4264 | unknown_type_node, | |
4265 | BASELINK_FUNCTIONS (fns), | |
4266 | arglist); | |
50ad9642 MM |
4267 | return fns; |
4268 | } | |
4269 | ||
2c73f9f5 ML |
4270 | type = TREE_TYPE (fns); |
4271 | if (TREE_CODE (fns) == OVERLOAD || !type) | |
4272 | type = unknown_type_node; | |
c8094d83 | 4273 | |
f293ce4b | 4274 | return build2 (TEMPLATE_ID_EXPR, type, fns, arglist); |
386b8a85 JM |
4275 | } |
4276 | ||
a2b60a0e MM |
4277 | /* Within the scope of a template class S<T>, the name S gets bound |
4278 | (in build_self_reference) to a TYPE_DECL for the class, not a | |
4279 | TEMPLATE_DECL. If DECL is a TYPE_DECL for current_class_type, | |
4280 | or one of its enclosing classes, and that type is a template, | |
4281 | return the associated TEMPLATE_DECL. Otherwise, the original | |
4282 | DECL is returned. */ | |
4283 | ||
a723baf1 | 4284 | tree |
3a978d72 | 4285 | maybe_get_template_decl_from_type_decl (tree decl) |
a2b60a0e MM |
4286 | { |
4287 | return (decl != NULL_TREE | |
c8094d83 | 4288 | && TREE_CODE (decl) == TYPE_DECL |
a2b60a0e | 4289 | && DECL_ARTIFICIAL (decl) |
511b60ff | 4290 | && CLASS_TYPE_P (TREE_TYPE (decl)) |
c8094d83 | 4291 | && CLASSTYPE_TEMPLATE_INFO (TREE_TYPE (decl))) |
a2b60a0e MM |
4292 | ? CLASSTYPE_TI_TEMPLATE (TREE_TYPE (decl)) : decl; |
4293 | } | |
386b8a85 | 4294 | |
8d08fdba MS |
4295 | /* Given an IDENTIFIER_NODE (type TEMPLATE_DECL) and a chain of |
4296 | parameters, find the desired type. | |
4297 | ||
4298 | D1 is the PTYPENAME terminal, and ARGLIST is the list of arguments. | |
8d08fdba MS |
4299 | |
4300 | IN_DECL, if non-NULL, is the template declaration we are trying to | |
c8094d83 | 4301 | instantiate. |
75650646 | 4302 | |
838dfd8a | 4303 | If ENTERING_SCOPE is nonzero, we are about to enter the scope of |
36a117a5 | 4304 | the class we are looking up. |
c8094d83 | 4305 | |
c2ea3a40 | 4306 | Issue error and warning messages under control of COMPLAIN. |
36a117a5 | 4307 | |
75650646 MM |
4308 | If the template class is really a local class in a template |
4309 | function, then the FUNCTION_CONTEXT is the function in which it is | |
c8094d83 | 4310 | being instantiated. |
b6ab6892 GB |
4311 | |
4312 | ??? Note that this function is currently called *twice* for each | |
4313 | template-id: the first time from the parser, while creating the | |
4314 | incomplete type (finish_template_type), and the second type during the | |
4315 | real instantiation (instantiate_template_class). This is surely something | |
4316 | that we want to avoid. It also causes some problems with argument | |
4317 | coercion (see convert_nontype_argument for more information on this). */ | |
e92cc029 | 4318 | |
8d08fdba | 4319 | tree |
c8094d83 | 4320 | lookup_template_class (tree d1, |
0cbd7506 MS |
4321 | tree arglist, |
4322 | tree in_decl, | |
4323 | tree context, | |
4324 | int entering_scope, | |
4325 | tsubst_flags_t complain) | |
8d08fdba | 4326 | { |
a703fb38 | 4327 | tree template = NULL_TREE, parmlist; |
dbfe2124 | 4328 | tree t; |
c8094d83 | 4329 | |
fd295cb2 | 4330 | timevar_push (TV_NAME_LOOKUP); |
c8094d83 | 4331 | |
5566b478 MS |
4332 | if (TREE_CODE (d1) == IDENTIFIER_NODE) |
4333 | { | |
90ea9897 MM |
4334 | tree value = innermost_non_namespace_value (d1); |
4335 | if (value && DECL_TEMPLATE_TEMPLATE_PARM_P (value)) | |
4336 | template = value; | |
73b0fce8 KL |
4337 | else |
4338 | { | |
2c73f9f5 ML |
4339 | if (context) |
4340 | push_decl_namespace (context); | |
3ebc5c52 MM |
4341 | template = lookup_name (d1, /*prefer_type=*/0); |
4342 | template = maybe_get_template_decl_from_type_decl (template); | |
2c73f9f5 ML |
4343 | if (context) |
4344 | pop_decl_namespace (); | |
73b0fce8 | 4345 | } |
8d019cef JM |
4346 | if (template) |
4347 | context = DECL_CONTEXT (template); | |
5566b478 | 4348 | } |
c91a56d2 MS |
4349 | else if (TREE_CODE (d1) == TYPE_DECL && IS_AGGR_TYPE (TREE_TYPE (d1))) |
4350 | { | |
802dbc34 JM |
4351 | tree type = TREE_TYPE (d1); |
4352 | ||
4353 | /* If we are declaring a constructor, say A<T>::A<T>, we will get | |
4354 | an implicit typename for the second A. Deal with it. */ | |
4355 | if (TREE_CODE (type) == TYPENAME_TYPE && TREE_TYPE (type)) | |
4356 | type = TREE_TYPE (type); | |
c8094d83 | 4357 | |
802dbc34 | 4358 | if (CLASSTYPE_TEMPLATE_INFO (type)) |
f3400fe2 | 4359 | { |
802dbc34 | 4360 | template = CLASSTYPE_TI_TEMPLATE (type); |
f3400fe2 JM |
4361 | d1 = DECL_NAME (template); |
4362 | } | |
c91a56d2 | 4363 | } |
c8094d83 | 4364 | else if (TREE_CODE (d1) == ENUMERAL_TYPE |
2f939d94 | 4365 | || (TYPE_P (d1) && IS_AGGR_TYPE (d1))) |
5566b478 | 4366 | { |
ed44da02 | 4367 | template = TYPE_TI_TEMPLATE (d1); |
5566b478 MS |
4368 | d1 = DECL_NAME (template); |
4369 | } | |
93cdc044 | 4370 | else if (TREE_CODE (d1) == TEMPLATE_DECL |
17aec3eb | 4371 | && TREE_CODE (DECL_TEMPLATE_RESULT (d1)) == TYPE_DECL) |
93cdc044 JM |
4372 | { |
4373 | template = d1; | |
4374 | d1 = DECL_NAME (template); | |
4375 | context = DECL_CONTEXT (template); | |
4376 | } | |
8d08fdba | 4377 | |
90ea9897 | 4378 | /* Issue an error message if we didn't find a template. */ |
8d08fdba | 4379 | if (! template) |
f3400fe2 | 4380 | { |
c2ea3a40 | 4381 | if (complain & tf_error) |
0cbd7506 | 4382 | error ("%qT is not a template", d1); |
fd295cb2 | 4383 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node); |
f3400fe2 | 4384 | } |
2c73f9f5 | 4385 | |
a87b4257 | 4386 | if (TREE_CODE (template) != TEMPLATE_DECL |
0cbd7506 | 4387 | /* Make sure it's a user visible template, if it was named by |
42eaed49 NS |
4388 | the user. */ |
4389 | || ((complain & tf_user) && !DECL_TEMPLATE_PARM_P (template) | |
4390 | && !PRIMARY_TEMPLATE_P (template))) | |
8d08fdba | 4391 | { |
c2ea3a40 | 4392 | if (complain & tf_error) |
0cbd7506 MS |
4393 | { |
4394 | error ("non-template type %qT used as a template", d1); | |
4395 | if (in_decl) | |
dee15844 | 4396 | error ("for template declaration %q+D", in_decl); |
f9c244b8 | 4397 | } |
fd295cb2 | 4398 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node); |
8d08fdba | 4399 | } |
8d08fdba | 4400 | |
42eaed49 | 4401 | complain &= ~tf_user; |
c8094d83 | 4402 | |
73b0fce8 KL |
4403 | if (DECL_TEMPLATE_TEMPLATE_PARM_P (template)) |
4404 | { | |
4405 | /* Create a new TEMPLATE_DECL and TEMPLATE_TEMPLATE_PARM node to store | |
0cbd7506 | 4406 | template arguments */ |
73b0fce8 | 4407 | |
1899c3a4 | 4408 | tree parm; |
73b0fce8 KL |
4409 | tree arglist2; |
4410 | ||
73b0fce8 KL |
4411 | parmlist = DECL_INNERMOST_TEMPLATE_PARMS (template); |
4412 | ||
4f96ff63 KL |
4413 | /* Consider an example where a template template parameter declared as |
4414 | ||
4415 | template <class T, class U = std::allocator<T> > class TT | |
4416 | ||
c8094d83 MS |
4417 | The template parameter level of T and U are one level larger than |
4418 | of TT. To proper process the default argument of U, say when an | |
4f96ff63 | 4419 | instantiation `TT<int>' is seen, we need to build the full |
342cea95 KL |
4420 | arguments containing {int} as the innermost level. Outer levels, |
4421 | available when not appearing as default template argument, can be | |
4422 | obtained from `current_template_args ()'. | |
4f96ff63 | 4423 | |
342cea95 KL |
4424 | Suppose that TT is later substituted with std::vector. The above |
4425 | instantiation is `TT<int, std::allocator<T> >' with TT at | |
4426 | level 1, and T at level 2, while the template arguments at level 1 | |
4427 | becomes {std::vector} and the inner level 2 is {int}. */ | |
4428 | ||
4429 | if (current_template_parms) | |
4f96ff63 KL |
4430 | arglist = add_to_template_args (current_template_args (), arglist); |
4431 | ||
f9c244b8 | 4432 | arglist2 = coerce_template_parms (parmlist, arglist, template, |
0cbd7506 | 4433 | complain, /*require_all_args=*/1); |
3e4a3562 | 4434 | if (arglist2 == error_mark_node |
544aef8c | 4435 | || (!uses_template_parms (arglist2) |
3e4a3562 | 4436 | && check_instantiated_args (template, arglist2, complain))) |
0cbd7506 | 4437 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node); |
73b0fce8 | 4438 | |
dac65501 | 4439 | parm = bind_template_template_parm (TREE_TYPE (template), arglist2); |
fd295cb2 | 4440 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, parm); |
73b0fce8 | 4441 | } |
c8094d83 | 4442 | else |
8d08fdba | 4443 | { |
36a117a5 | 4444 | tree template_type = TREE_TYPE (template); |
7ac7b28f | 4445 | tree gen_tmpl; |
36a117a5 MM |
4446 | tree type_decl; |
4447 | tree found = NULL_TREE; | |
4448 | int arg_depth; | |
4449 | int parm_depth; | |
dbfe2124 | 4450 | int is_partial_instantiation; |
830bfa74 | 4451 | |
7ac7b28f MM |
4452 | gen_tmpl = most_general_template (template); |
4453 | parmlist = DECL_TEMPLATE_PARMS (gen_tmpl); | |
36a117a5 MM |
4454 | parm_depth = TMPL_PARMS_DEPTH (parmlist); |
4455 | arg_depth = TMPL_ARGS_DEPTH (arglist); | |
4456 | ||
4457 | if (arg_depth == 1 && parm_depth > 1) | |
4458 | { | |
39c01e4c | 4459 | /* We've been given an incomplete set of template arguments. |
36a117a5 MM |
4460 | For example, given: |
4461 | ||
4462 | template <class T> struct S1 { | |
0cbd7506 | 4463 | template <class U> struct S2 {}; |
36a117a5 | 4464 | template <class U> struct S2<U*> {}; |
0cbd7506 | 4465 | }; |
c8094d83 | 4466 | |
36a117a5 MM |
4467 | we will be called with an ARGLIST of `U*', but the |
4468 | TEMPLATE will be `template <class T> template | |
4469 | <class U> struct S1<T>::S2'. We must fill in the missing | |
4470 | arguments. */ | |
c8094d83 | 4471 | arglist |
7ac7b28f MM |
4472 | = add_outermost_template_args (TYPE_TI_ARGS (TREE_TYPE (template)), |
4473 | arglist); | |
36a117a5 MM |
4474 | arg_depth = TMPL_ARGS_DEPTH (arglist); |
4475 | } | |
5566b478 | 4476 | |
41f5d4b1 | 4477 | /* Now we should have enough arguments. */ |
50bc768d | 4478 | gcc_assert (parm_depth == arg_depth); |
c8094d83 | 4479 | |
7ac7b28f MM |
4480 | /* From here on, we're only interested in the most general |
4481 | template. */ | |
4482 | template = gen_tmpl; | |
4483 | ||
36a117a5 MM |
4484 | /* Calculate the BOUND_ARGS. These will be the args that are |
4485 | actually tsubst'd into the definition to create the | |
4486 | instantiation. */ | |
4487 | if (parm_depth > 1) | |
830bfa74 MM |
4488 | { |
4489 | /* We have multiple levels of arguments to coerce, at once. */ | |
830bfa74 | 4490 | int i; |
e4a84209 | 4491 | int saved_depth = TMPL_ARGS_DEPTH (arglist); |
36a117a5 | 4492 | |
f31c0a32 | 4493 | tree bound_args = make_tree_vec (parm_depth); |
c8094d83 | 4494 | |
e4a84209 | 4495 | for (i = saved_depth, |
c8094d83 | 4496 | t = DECL_TEMPLATE_PARMS (template); |
e4a84209 | 4497 | i > 0 && t != NULL_TREE; |
830bfa74 | 4498 | --i, t = TREE_CHAIN (t)) |
e4a84209 | 4499 | { |
ee3071ef NS |
4500 | tree a = coerce_template_parms (TREE_VALUE (t), |
4501 | arglist, template, | |
0cbd7506 | 4502 | complain, /*require_all_args=*/1); |
88e98cfe KL |
4503 | |
4504 | /* Don't process further if one of the levels fails. */ | |
4505 | if (a == error_mark_node) | |
4506 | { | |
4507 | /* Restore the ARGLIST to its full size. */ | |
4508 | TREE_VEC_LENGTH (arglist) = saved_depth; | |
4509 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node); | |
4510 | } | |
c8094d83 | 4511 | |
e4a84209 MM |
4512 | SET_TMPL_ARGS_LEVEL (bound_args, i, a); |
4513 | ||
4514 | /* We temporarily reduce the length of the ARGLIST so | |
4515 | that coerce_template_parms will see only the arguments | |
4516 | corresponding to the template parameters it is | |
4517 | examining. */ | |
4518 | TREE_VEC_LENGTH (arglist)--; | |
4519 | } | |
4520 | ||
4521 | /* Restore the ARGLIST to its full size. */ | |
4522 | TREE_VEC_LENGTH (arglist) = saved_depth; | |
4523 | ||
36a117a5 | 4524 | arglist = bound_args; |
830bfa74 MM |
4525 | } |
4526 | else | |
36a117a5 MM |
4527 | arglist |
4528 | = coerce_template_parms (INNERMOST_TEMPLATE_PARMS (parmlist), | |
f9a7ae04 | 4529 | INNERMOST_TEMPLATE_ARGS (arglist), |
f9c244b8 | 4530 | template, |
0cbd7506 | 4531 | complain, /*require_all_args=*/1); |
36a117a5 | 4532 | |
c353b8e3 | 4533 | if (arglist == error_mark_node) |
36a117a5 | 4534 | /* We were unable to bind the arguments. */ |
fd295cb2 | 4535 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node); |
5566b478 | 4536 | |
36a117a5 MM |
4537 | /* In the scope of a template class, explicit references to the |
4538 | template class refer to the type of the template, not any | |
4539 | instantiation of it. For example, in: | |
c8094d83 | 4540 | |
36a117a5 MM |
4541 | template <class T> class C { void f(C<T>); } |
4542 | ||
4543 | the `C<T>' is just the same as `C'. Outside of the | |
4544 | class, however, such a reference is an instantiation. */ | |
ed44da02 | 4545 | if (comp_template_args (TYPE_TI_ARGS (template_type), |
36a117a5 MM |
4546 | arglist)) |
4547 | { | |
4548 | found = template_type; | |
c8094d83 | 4549 | |
36a117a5 | 4550 | if (!entering_scope && PRIMARY_TEMPLATE_P (template)) |
5566b478 | 4551 | { |
36a117a5 | 4552 | tree ctx; |
c8094d83 MS |
4553 | |
4554 | for (ctx = current_class_type; | |
5f04800c KL |
4555 | ctx && TREE_CODE (ctx) != NAMESPACE_DECL; |
4556 | ctx = (TYPE_P (ctx) | |
4557 | ? TYPE_CONTEXT (ctx) | |
4558 | : DECL_CONTEXT (ctx))) | |
4559 | if (TYPE_P (ctx) && same_type_p (ctx, template_type)) | |
4560 | goto found_ctx; | |
c8094d83 | 4561 | |
6df5158a NS |
4562 | /* We're not in the scope of the class, so the |
4563 | TEMPLATE_TYPE is not the type we want after all. */ | |
4564 | found = NULL_TREE; | |
4565 | found_ctx:; | |
5566b478 MS |
4566 | } |
4567 | } | |
36a117a5 | 4568 | if (found) |
0cbd7506 | 4569 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, found); |
414ea4aa | 4570 | |
c7222c02 MM |
4571 | /* If we already have this specialization, return it. */ |
4572 | found = retrieve_specialization (template, arglist, | |
4573 | /*class_specializations_p=*/false); | |
4574 | if (found) | |
4575 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, found); | |
5566b478 | 4576 | |
dbfe2124 | 4577 | /* This type is a "partial instantiation" if any of the template |
ab097535 | 4578 | arguments still involve template parameters. Note that we set |
486e4077 MM |
4579 | IS_PARTIAL_INSTANTIATION for partial specializations as |
4580 | well. */ | |
dbfe2124 MM |
4581 | is_partial_instantiation = uses_template_parms (arglist); |
4582 | ||
c353b8e3 MM |
4583 | /* If the deduced arguments are invalid, then the binding |
4584 | failed. */ | |
4585 | if (!is_partial_instantiation | |
4586 | && check_instantiated_args (template, | |
4587 | INNERMOST_TEMPLATE_ARGS (arglist), | |
4588 | complain)) | |
4589 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node); | |
c8094d83 MS |
4590 | |
4591 | if (!is_partial_instantiation | |
3ebc5c52 MM |
4592 | && !PRIMARY_TEMPLATE_P (template) |
4593 | && TREE_CODE (CP_DECL_CONTEXT (template)) == NAMESPACE_DECL) | |
4594 | { | |
3ebc5c52 MM |
4595 | found = xref_tag_from_type (TREE_TYPE (template), |
4596 | DECL_NAME (template), | |
29ef83de | 4597 | /*tag_scope=*/ts_global); |
fd295cb2 | 4598 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, found); |
3ebc5c52 | 4599 | } |
c8094d83 | 4600 | |
95ee998c | 4601 | context = tsubst (DECL_CONTEXT (template), arglist, |
c2ea3a40 | 4602 | complain, in_decl); |
95ee998c MM |
4603 | if (!context) |
4604 | context = global_namespace; | |
4605 | ||
36a117a5 | 4606 | /* Create the type. */ |
ed44da02 MM |
4607 | if (TREE_CODE (template_type) == ENUMERAL_TYPE) |
4608 | { | |
dbfe2124 | 4609 | if (!is_partial_instantiation) |
92777ce4 NS |
4610 | { |
4611 | set_current_access_from_decl (TYPE_NAME (template_type)); | |
4612 | t = start_enum (TYPE_IDENTIFIER (template_type)); | |
4613 | } | |
ed44da02 | 4614 | else |
dbfe2124 | 4615 | /* We don't want to call start_enum for this type, since |
ed44da02 MM |
4616 | the values for the enumeration constants may involve |
4617 | template parameters. And, no one should be interested | |
4618 | in the enumeration constants for such a type. */ | |
4619 | t = make_node (ENUMERAL_TYPE); | |
4620 | } | |
4621 | else | |
4622 | { | |
33848bb0 | 4623 | t = make_aggr_type (TREE_CODE (template_type)); |
c8094d83 | 4624 | CLASSTYPE_DECLARED_CLASS (t) |
ed44da02 | 4625 | = CLASSTYPE_DECLARED_CLASS (template_type); |
ed44da02 | 4626 | SET_CLASSTYPE_IMPLICIT_INSTANTIATION (t); |
f668f160 | 4627 | TYPE_FOR_JAVA (t) = TYPE_FOR_JAVA (template_type); |
ae673f14 JM |
4628 | |
4629 | /* A local class. Make sure the decl gets registered properly. */ | |
4630 | if (context == current_function_decl) | |
bd3d082e | 4631 | pushtag (DECL_NAME (template), t, /*tag_scope=*/ts_current); |
ed44da02 MM |
4632 | } |
4633 | ||
ae673f14 JM |
4634 | /* If we called start_enum or pushtag above, this information |
4635 | will already be set up. */ | |
ed44da02 MM |
4636 | if (!TYPE_NAME (t)) |
4637 | { | |
4638 | TYPE_CONTEXT (t) = FROB_CONTEXT (context); | |
c8094d83 | 4639 | |
9188c363 | 4640 | type_decl = create_implicit_typedef (DECL_NAME (template), t); |
ed44da02 | 4641 | DECL_CONTEXT (type_decl) = TYPE_CONTEXT (t); |
9188c363 | 4642 | TYPE_STUB_DECL (t) = type_decl; |
c8094d83 | 4643 | DECL_SOURCE_LOCATION (type_decl) |
f31686a3 | 4644 | = DECL_SOURCE_LOCATION (TYPE_STUB_DECL (template_type)); |
ed44da02 MM |
4645 | } |
4646 | else | |
4647 | type_decl = TYPE_NAME (t); | |
36a117a5 | 4648 | |
cab7a9a3 KL |
4649 | TREE_PRIVATE (type_decl) |
4650 | = TREE_PRIVATE (TYPE_STUB_DECL (template_type)); | |
4651 | TREE_PROTECTED (type_decl) | |
4652 | = TREE_PROTECTED (TYPE_STUB_DECL (template_type)); | |
12af7ba3 MM |
4653 | DECL_IN_SYSTEM_HEADER (type_decl) |
4654 | = DECL_IN_SYSTEM_HEADER (template); | |
8d039470 MS |
4655 | if (CLASSTYPE_VISIBILITY_SPECIFIED (template_type)) |
4656 | { | |
4657 | DECL_VISIBILITY_SPECIFIED (type_decl) = 1; | |
4658 | DECL_VISIBILITY (type_decl) = CLASSTYPE_VISIBILITY (template_type); | |
4659 | } | |
cab7a9a3 | 4660 | |
9fbf56f7 MM |
4661 | /* Set up the template information. We have to figure out which |
4662 | template is the immediate parent if this is a full | |
4663 | instantiation. */ | |
4664 | if (parm_depth == 1 || is_partial_instantiation | |
4665 | || !PRIMARY_TEMPLATE_P (template)) | |
4666 | /* This case is easy; there are no member templates involved. */ | |
4667 | found = template; | |
4668 | else | |
4669 | { | |
ab097535 NS |
4670 | /* This is a full instantiation of a member template. Look |
4671 | for a partial instantiation of which this is an instance. */ | |
9fbf56f7 MM |
4672 | |
4673 | for (found = DECL_TEMPLATE_INSTANTIATIONS (template); | |
4674 | found; found = TREE_CHAIN (found)) | |
4675 | { | |
4676 | int success; | |
4677 | tree tmpl = CLASSTYPE_TI_TEMPLATE (TREE_VALUE (found)); | |
4678 | ||
4679 | /* We only want partial instantiations, here, not | |
4680 | specializations or full instantiations. */ | |
370af2d5 | 4681 | if (CLASSTYPE_TEMPLATE_SPECIALIZATION (TREE_VALUE (found)) |
9fbf56f7 MM |
4682 | || !uses_template_parms (TREE_VALUE (found))) |
4683 | continue; | |
4684 | ||
4685 | /* Temporarily reduce by one the number of levels in the | |
4686 | ARGLIST and in FOUND so as to avoid comparing the | |
4687 | last set of arguments. */ | |
4688 | TREE_VEC_LENGTH (arglist)--; | |
4689 | TREE_VEC_LENGTH (TREE_PURPOSE (found)) --; | |
4690 | ||
4691 | /* See if the arguments match. If they do, then TMPL is | |
4692 | the partial instantiation we want. */ | |
4693 | success = comp_template_args (TREE_PURPOSE (found), arglist); | |
4694 | ||
4695 | /* Restore the argument vectors to their full size. */ | |
4696 | TREE_VEC_LENGTH (arglist)++; | |
4697 | TREE_VEC_LENGTH (TREE_PURPOSE (found))++; | |
4698 | ||
4699 | if (success) | |
4700 | { | |
4701 | found = tmpl; | |
4702 | break; | |
4703 | } | |
4704 | } | |
4705 | ||
4706 | if (!found) | |
ab097535 NS |
4707 | { |
4708 | /* There was no partial instantiation. This happens | |
0cbd7506 MS |
4709 | where C<T> is a member template of A<T> and it's used |
4710 | in something like | |
c8094d83 | 4711 | |
0cbd7506 MS |
4712 | template <typename T> struct B { A<T>::C<int> m; }; |
4713 | B<float>; | |
c8094d83 | 4714 | |
0cbd7506 MS |
4715 | Create the partial instantiation. |
4716 | */ | |
4717 | TREE_VEC_LENGTH (arglist)--; | |
4718 | found = tsubst (template, arglist, complain, NULL_TREE); | |
4719 | TREE_VEC_LENGTH (arglist)++; | |
4720 | } | |
9fbf56f7 MM |
4721 | } |
4722 | ||
c8094d83 MS |
4723 | SET_TYPE_TEMPLATE_INFO (t, tree_cons (found, arglist, NULL_TREE)); |
4724 | DECL_TEMPLATE_INSTANTIATIONS (template) | |
4725 | = tree_cons (arglist, t, | |
dbfe2124 MM |
4726 | DECL_TEMPLATE_INSTANTIATIONS (template)); |
4727 | ||
c8094d83 | 4728 | if (TREE_CODE (t) == ENUMERAL_TYPE |
dbfe2124 | 4729 | && !is_partial_instantiation) |
61a127b3 MM |
4730 | /* Now that the type has been registered on the instantiations |
4731 | list, we set up the enumerators. Because the enumeration | |
4732 | constants may involve the enumeration type itself, we make | |
4733 | sure to register the type first, and then create the | |
4734 | constants. That way, doing tsubst_expr for the enumeration | |
4735 | constants won't result in recursive calls here; we'll find | |
4736 | the instantiation and exit above. */ | |
4737 | tsubst_enum (template_type, t, arglist); | |
dbfe2124 | 4738 | |
36a117a5 MM |
4739 | /* Reset the name of the type, now that CLASSTYPE_TEMPLATE_INFO |
4740 | is set up. */ | |
ed44da02 MM |
4741 | if (TREE_CODE (t) != ENUMERAL_TYPE) |
4742 | DECL_NAME (type_decl) = classtype_mangled_name (t); | |
7813d14c | 4743 | if (is_partial_instantiation) |
077e7015 MM |
4744 | /* If the type makes use of template parameters, the |
4745 | code that generates debugging information will crash. */ | |
4746 | DECL_IGNORED_P (TYPE_STUB_DECL (t)) = 1; | |
8d08fdba | 4747 | |
fd295cb2 | 4748 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t); |
36a117a5 | 4749 | } |
fd295cb2 | 4750 | timevar_pop (TV_NAME_LOOKUP); |
8d08fdba MS |
4751 | } |
4752 | \f | |
c8094d83 | 4753 | struct pair_fn_data |
8d08fdba | 4754 | { |
8dfaeb63 MM |
4755 | tree_fn_t fn; |
4756 | void *data; | |
0c58f841 | 4757 | struct pointer_set_t *visited; |
8dfaeb63 MM |
4758 | }; |
4759 | ||
4760 | /* Called from for_each_template_parm via walk_tree. */ | |
581d38d0 | 4761 | |
8dfaeb63 | 4762 | static tree |
350fae66 | 4763 | for_each_template_parm_r (tree *tp, int *walk_subtrees, void *d) |
8dfaeb63 MM |
4764 | { |
4765 | tree t = *tp; | |
4766 | struct pair_fn_data *pfd = (struct pair_fn_data *) d; | |
4767 | tree_fn_t fn = pfd->fn; | |
4768 | void *data = pfd->data; | |
4f2c9d7e | 4769 | |
2f939d94 | 4770 | if (TYPE_P (t) |
4f2c9d7e | 4771 | && for_each_template_parm (TYPE_CONTEXT (t), fn, data, pfd->visited)) |
8dfaeb63 | 4772 | return error_mark_node; |
581d38d0 | 4773 | |
8d08fdba MS |
4774 | switch (TREE_CODE (t)) |
4775 | { | |
8d08fdba | 4776 | case RECORD_TYPE: |
9076e292 | 4777 | if (TYPE_PTRMEMFUNC_P (t)) |
8dfaeb63 | 4778 | break; |
ed44da02 MM |
4779 | /* Fall through. */ |
4780 | ||
8d08fdba | 4781 | case UNION_TYPE: |
ed44da02 | 4782 | case ENUMERAL_TYPE: |
8dfaeb63 MM |
4783 | if (!TYPE_TEMPLATE_INFO (t)) |
4784 | *walk_subtrees = 0; | |
4785 | else if (for_each_template_parm (TREE_VALUE (TYPE_TEMPLATE_INFO (t)), | |
4f2c9d7e | 4786 | fn, data, pfd->visited)) |
8dfaeb63 MM |
4787 | return error_mark_node; |
4788 | break; | |
4789 | ||
588c2d1c | 4790 | case METHOD_TYPE: |
8dfaeb63 MM |
4791 | /* Since we're not going to walk subtrees, we have to do this |
4792 | explicitly here. */ | |
4f2c9d7e MM |
4793 | if (for_each_template_parm (TYPE_METHOD_BASETYPE (t), fn, data, |
4794 | pfd->visited)) | |
8dfaeb63 | 4795 | return error_mark_node; |
4890c2f4 | 4796 | /* Fall through. */ |
588c2d1c MM |
4797 | |
4798 | case FUNCTION_TYPE: | |
8dfaeb63 | 4799 | /* Check the return type. */ |
4f2c9d7e | 4800 | if (for_each_template_parm (TREE_TYPE (t), fn, data, pfd->visited)) |
8dfaeb63 MM |
4801 | return error_mark_node; |
4802 | ||
588c2d1c MM |
4803 | /* Check the parameter types. Since default arguments are not |
4804 | instantiated until they are needed, the TYPE_ARG_TYPES may | |
4805 | contain expressions that involve template parameters. But, | |
4806 | no-one should be looking at them yet. And, once they're | |
4807 | instantiated, they don't contain template parameters, so | |
4808 | there's no point in looking at them then, either. */ | |
4809 | { | |
4810 | tree parm; | |
4811 | ||
4812 | for (parm = TYPE_ARG_TYPES (t); parm; parm = TREE_CHAIN (parm)) | |
4f2c9d7e MM |
4813 | if (for_each_template_parm (TREE_VALUE (parm), fn, data, |
4814 | pfd->visited)) | |
8dfaeb63 | 4815 | return error_mark_node; |
5566b478 | 4816 | |
8dfaeb63 MM |
4817 | /* Since we've already handled the TYPE_ARG_TYPES, we don't |
4818 | want walk_tree walking into them itself. */ | |
4819 | *walk_subtrees = 0; | |
4820 | } | |
4821 | break; | |
3ac3d9ea | 4822 | |
a723baf1 | 4823 | case TYPEOF_TYPE: |
c8094d83 | 4824 | if (for_each_template_parm (TYPE_FIELDS (t), fn, data, |
a723baf1 MM |
4825 | pfd->visited)) |
4826 | return error_mark_node; | |
4827 | break; | |
4828 | ||
8d08fdba | 4829 | case FUNCTION_DECL: |
5566b478 | 4830 | case VAR_DECL: |
5566b478 | 4831 | if (DECL_LANG_SPECIFIC (t) && DECL_TEMPLATE_INFO (t) |
4f2c9d7e MM |
4832 | && for_each_template_parm (DECL_TI_ARGS (t), fn, data, |
4833 | pfd->visited)) | |
8dfaeb63 MM |
4834 | return error_mark_node; |
4835 | /* Fall through. */ | |
4836 | ||
8d08fdba | 4837 | case PARM_DECL: |
a723baf1 MM |
4838 | case CONST_DECL: |
4839 | if (TREE_CODE (t) == CONST_DECL && DECL_TEMPLATE_PARM_P (t) | |
4840 | && for_each_template_parm (DECL_INITIAL (t), fn, data, | |
4841 | pfd->visited)) | |
4842 | return error_mark_node; | |
c8094d83 | 4843 | if (DECL_CONTEXT (t) |
4f2c9d7e MM |
4844 | && for_each_template_parm (DECL_CONTEXT (t), fn, data, |
4845 | pfd->visited)) | |
8dfaeb63 MM |
4846 | return error_mark_node; |
4847 | break; | |
8d08fdba | 4848 | |
a1281f45 | 4849 | case BOUND_TEMPLATE_TEMPLATE_PARM: |
744fac59 | 4850 | /* Record template parameters such as `T' inside `TT<T>'. */ |
4f2c9d7e | 4851 | if (for_each_template_parm (TYPE_TI_ARGS (t), fn, data, pfd->visited)) |
8dfaeb63 MM |
4852 | return error_mark_node; |
4853 | /* Fall through. */ | |
4854 | ||
a1281f45 | 4855 | case TEMPLATE_TEMPLATE_PARM: |
744fac59 | 4856 | case TEMPLATE_TYPE_PARM: |
f84b4be9 | 4857 | case TEMPLATE_PARM_INDEX: |
8dfaeb63 MM |
4858 | if (fn && (*fn)(t, data)) |
4859 | return error_mark_node; | |
4860 | else if (!fn) | |
4861 | return error_mark_node; | |
4862 | break; | |
5156628f | 4863 | |
8dfaeb63 | 4864 | case TEMPLATE_DECL: |
f4f206f4 | 4865 | /* A template template parameter is encountered. */ |
8dfaeb63 | 4866 | if (DECL_TEMPLATE_TEMPLATE_PARM_P (t) |
4f2c9d7e | 4867 | && for_each_template_parm (TREE_TYPE (t), fn, data, pfd->visited)) |
8dfaeb63 | 4868 | return error_mark_node; |
db5ae43f | 4869 | |
8dfaeb63 MM |
4870 | /* Already substituted template template parameter */ |
4871 | *walk_subtrees = 0; | |
4872 | break; | |
b8865407 | 4873 | |
4699c561 | 4874 | case TYPENAME_TYPE: |
c8094d83 | 4875 | if (!fn |
4f2c9d7e MM |
4876 | || for_each_template_parm (TYPENAME_TYPE_FULLNAME (t), fn, |
4877 | data, pfd->visited)) | |
8dfaeb63 MM |
4878 | return error_mark_node; |
4879 | break; | |
4699c561 | 4880 | |
8dfaeb63 MM |
4881 | case CONSTRUCTOR: |
4882 | if (TREE_TYPE (t) && TYPE_PTRMEMFUNC_P (TREE_TYPE (t)) | |
4883 | && for_each_template_parm (TYPE_PTRMEMFUNC_FN_TYPE | |
4f2c9d7e MM |
4884 | (TREE_TYPE (t)), fn, data, |
4885 | pfd->visited)) | |
8dfaeb63 MM |
4886 | return error_mark_node; |
4887 | break; | |
c8094d83 | 4888 | |
b8865407 MM |
4889 | case INDIRECT_REF: |
4890 | case COMPONENT_REF: | |
4699c561 | 4891 | /* If there's no type, then this thing must be some expression |
b8865407 | 4892 | involving template parameters. */ |
4699c561 | 4893 | if (!fn && !TREE_TYPE (t)) |
8dfaeb63 MM |
4894 | return error_mark_node; |
4895 | break; | |
b8865407 | 4896 | |
42976354 BK |
4897 | case MODOP_EXPR: |
4898 | case CAST_EXPR: | |
4899 | case REINTERPRET_CAST_EXPR: | |
4900 | case CONST_CAST_EXPR: | |
4901 | case STATIC_CAST_EXPR: | |
4902 | case DYNAMIC_CAST_EXPR: | |
42976354 BK |
4903 | case ARROW_EXPR: |
4904 | case DOTSTAR_EXPR: | |
4905 | case TYPEID_EXPR: | |
40242ccf | 4906 | case PSEUDO_DTOR_EXPR: |
b8865407 | 4907 | if (!fn) |
8dfaeb63 MM |
4908 | return error_mark_node; |
4909 | break; | |
abff8e06 | 4910 | |
bd9bb3d2 MM |
4911 | case BASELINK: |
4912 | /* If we do not handle this case specially, we end up walking | |
4913 | the BINFO hierarchy, which is circular, and therefore | |
4914 | confuses walk_tree. */ | |
4915 | *walk_subtrees = 0; | |
4f2c9d7e MM |
4916 | if (for_each_template_parm (BASELINK_FUNCTIONS (*tp), fn, data, |
4917 | pfd->visited)) | |
bd9bb3d2 MM |
4918 | return error_mark_node; |
4919 | break; | |
4920 | ||
8d08fdba | 4921 | default: |
8dfaeb63 | 4922 | break; |
8d08fdba | 4923 | } |
8dfaeb63 MM |
4924 | |
4925 | /* We didn't find any template parameters we liked. */ | |
4926 | return NULL_TREE; | |
4927 | } | |
4928 | ||
c8094d83 MS |
4929 | /* For each TEMPLATE_TYPE_PARM, TEMPLATE_TEMPLATE_PARM, |
4930 | BOUND_TEMPLATE_TEMPLATE_PARM or TEMPLATE_PARM_INDEX in T, | |
a1281f45 | 4931 | call FN with the parameter and the DATA. |
838dfd8a | 4932 | If FN returns nonzero, the iteration is terminated, and |
8dfaeb63 | 4933 | for_each_template_parm returns 1. Otherwise, the iteration |
838dfd8a | 4934 | continues. If FN never returns a nonzero value, the value |
8dfaeb63 MM |
4935 | returned by for_each_template_parm is 0. If FN is NULL, it is |
4936 | considered to be the function which always returns 1. */ | |
4937 | ||
4938 | static int | |
0c58f841 MA |
4939 | for_each_template_parm (tree t, tree_fn_t fn, void* data, |
4940 | struct pointer_set_t *visited) | |
8dfaeb63 MM |
4941 | { |
4942 | struct pair_fn_data pfd; | |
ad2ae3b2 | 4943 | int result; |
8dfaeb63 MM |
4944 | |
4945 | /* Set up. */ | |
4946 | pfd.fn = fn; | |
4947 | pfd.data = data; | |
4948 | ||
4890c2f4 MM |
4949 | /* Walk the tree. (Conceptually, we would like to walk without |
4950 | duplicates, but for_each_template_parm_r recursively calls | |
4951 | for_each_template_parm, so we would need to reorganize a fair | |
4f2c9d7e MM |
4952 | bit to use walk_tree_without_duplicates, so we keep our own |
4953 | visited list.) */ | |
4954 | if (visited) | |
4955 | pfd.visited = visited; | |
4956 | else | |
0c58f841 | 4957 | pfd.visited = pointer_set_create (); |
c8094d83 MS |
4958 | result = walk_tree (&t, |
4959 | for_each_template_parm_r, | |
ad2ae3b2 | 4960 | &pfd, |
c1e39976 | 4961 | pfd.visited) != NULL_TREE; |
ad2ae3b2 MM |
4962 | |
4963 | /* Clean up. */ | |
4964 | if (!visited) | |
0c58f841 MA |
4965 | { |
4966 | pointer_set_destroy (pfd.visited); | |
4967 | pfd.visited = 0; | |
4968 | } | |
ad2ae3b2 MM |
4969 | |
4970 | return result; | |
8d08fdba MS |
4971 | } |
4972 | ||
d43f603d KL |
4973 | /* Returns true if T depends on any template parameter. */ |
4974 | ||
050367a3 | 4975 | int |
3a978d72 | 4976 | uses_template_parms (tree t) |
050367a3 | 4977 | { |
c353b8e3 MM |
4978 | bool dependent_p; |
4979 | int saved_processing_template_decl; | |
4980 | ||
4981 | saved_processing_template_decl = processing_template_decl; | |
4982 | if (!saved_processing_template_decl) | |
4983 | processing_template_decl = 1; | |
4984 | if (TYPE_P (t)) | |
4985 | dependent_p = dependent_type_p (t); | |
4986 | else if (TREE_CODE (t) == TREE_VEC) | |
4987 | dependent_p = any_dependent_template_arguments_p (t); | |
4988 | else if (TREE_CODE (t) == TREE_LIST) | |
4989 | dependent_p = (uses_template_parms (TREE_VALUE (t)) | |
4990 | || uses_template_parms (TREE_CHAIN (t))); | |
3ce5fa4f NS |
4991 | else if (TREE_CODE (t) == TYPE_DECL) |
4992 | dependent_p = dependent_type_p (TREE_TYPE (t)); | |
c8094d83 MS |
4993 | else if (DECL_P (t) |
4994 | || EXPR_P (t) | |
c353b8e3 MM |
4995 | || TREE_CODE (t) == TEMPLATE_PARM_INDEX |
4996 | || TREE_CODE (t) == OVERLOAD | |
4997 | || TREE_CODE (t) == BASELINK | |
b207d6e2 | 4998 | || TREE_CODE (t) == IDENTIFIER_NODE |
6615c446 | 4999 | || CONSTANT_CLASS_P (t)) |
c353b8e3 MM |
5000 | dependent_p = (type_dependent_expression_p (t) |
5001 | || value_dependent_expression_p (t)); | |
315fb5db NS |
5002 | else |
5003 | { | |
5004 | gcc_assert (t == error_mark_node); | |
5005 | dependent_p = false; | |
5006 | } | |
c8094d83 | 5007 | |
c353b8e3 MM |
5008 | processing_template_decl = saved_processing_template_decl; |
5009 | ||
5010 | return dependent_p; | |
050367a3 MM |
5011 | } |
5012 | ||
d43f603d KL |
5013 | /* Returns true if T depends on any template parameter with level LEVEL. */ |
5014 | ||
5015 | int | |
5016 | uses_template_parms_level (tree t, int level) | |
5017 | { | |
5018 | return for_each_template_parm (t, template_parm_this_level_p, &level, NULL); | |
5019 | } | |
5020 | ||
27fafc8d | 5021 | static int tinst_depth; |
e9f32eb5 | 5022 | extern int max_tinst_depth; |
5566b478 | 5023 | #ifdef GATHER_STATISTICS |
27fafc8d | 5024 | int depth_reached; |
5566b478 | 5025 | #endif |
8dfaeb63 MM |
5026 | static int tinst_level_tick; |
5027 | static int last_template_error_tick; | |
8d08fdba | 5028 | |
3ae18eaf JM |
5029 | /* We're starting to instantiate D; record the template instantiation context |
5030 | for diagnostics and to restore it later. */ | |
5031 | ||
742a37d5 | 5032 | int |
3a978d72 | 5033 | push_tinst_level (tree d) |
8d08fdba | 5034 | { |
3ae18eaf | 5035 | tree new; |
8d08fdba | 5036 | |
7215f9a0 MS |
5037 | if (tinst_depth >= max_tinst_depth) |
5038 | { | |
8adf5b5e JM |
5039 | /* If the instantiation in question still has unbound template parms, |
5040 | we don't really care if we can't instantiate it, so just return. | |
0cbd7506 | 5041 | This happens with base instantiation for implicit `typename'. */ |
8adf5b5e JM |
5042 | if (uses_template_parms (d)) |
5043 | return 0; | |
5044 | ||
1139b3d8 | 5045 | last_template_error_tick = tinst_level_tick; |
0f51ccfc | 5046 | error ("template instantiation depth exceeds maximum of %d (use " |
0cbd7506 | 5047 | "-ftemplate-depth-NN to increase the maximum) instantiating %qD", |
b4f4233d | 5048 | max_tinst_depth, d); |
5566b478 | 5049 | |
cb753e49 | 5050 | print_instantiation_context (); |
5566b478 | 5051 | |
7215f9a0 MS |
5052 | return 0; |
5053 | } | |
5054 | ||
12af7ba3 MM |
5055 | new = make_node (TINST_LEVEL); |
5056 | TINST_DECL (new) = d; | |
5057 | TINST_LOCATION (new) = input_location; | |
5058 | TINST_IN_SYSTEM_HEADER_P (new) = in_system_header; | |
3ae18eaf | 5059 | TREE_CHAIN (new) = current_tinst_level; |
8d08fdba | 5060 | current_tinst_level = new; |
5566b478 | 5061 | |
7215f9a0 | 5062 | ++tinst_depth; |
5566b478 MS |
5063 | #ifdef GATHER_STATISTICS |
5064 | if (tinst_depth > depth_reached) | |
5065 | depth_reached = tinst_depth; | |
5066 | #endif | |
5067 | ||
27fafc8d | 5068 | ++tinst_level_tick; |
7215f9a0 | 5069 | return 1; |
8d08fdba MS |
5070 | } |
5071 | ||
3ae18eaf JM |
5072 | /* We're done instantiating this template; return to the instantiation |
5073 | context. */ | |
5074 | ||
8d08fdba | 5075 | void |
3a978d72 | 5076 | pop_tinst_level (void) |
8d08fdba | 5077 | { |
3ae18eaf | 5078 | tree old = current_tinst_level; |
8d08fdba | 5079 | |
ae58fa02 MM |
5080 | /* Restore the filename and line number stashed away when we started |
5081 | this instantiation. */ | |
406d77a4 | 5082 | input_location = TINST_LOCATION (old); |
12af7ba3 | 5083 | in_system_header = TINST_IN_SYSTEM_HEADER_P (old); |
3ae18eaf | 5084 | current_tinst_level = TREE_CHAIN (old); |
7215f9a0 | 5085 | --tinst_depth; |
27fafc8d | 5086 | ++tinst_level_tick; |
8d08fdba MS |
5087 | } |
5088 | ||
3ae18eaf JM |
5089 | /* We're instantiating a deferred template; restore the template |
5090 | instantiation context in which the instantiation was requested, which | |
5091 | is one step out from LEVEL. */ | |
5092 | ||
5093 | static void | |
3a978d72 | 5094 | reopen_tinst_level (tree level) |
3ae18eaf JM |
5095 | { |
5096 | tree t; | |
5097 | ||
5098 | tinst_depth = 0; | |
5099 | for (t = level; t; t = TREE_CHAIN (t)) | |
5100 | ++tinst_depth; | |
5101 | ||
5102 | current_tinst_level = level; | |
5103 | pop_tinst_level (); | |
5104 | } | |
5105 | ||
f84b4be9 JM |
5106 | /* DECL is a friend FUNCTION_DECL or TEMPLATE_DECL. ARGS is the |
5107 | vector of template arguments, as for tsubst. | |
5108 | ||
dc957d14 | 5109 | Returns an appropriate tsubst'd friend declaration. */ |
f84b4be9 JM |
5110 | |
5111 | static tree | |
3a978d72 | 5112 | tsubst_friend_function (tree decl, tree args) |
f84b4be9 JM |
5113 | { |
5114 | tree new_friend; | |
27fafc8d | 5115 | |
c8094d83 | 5116 | if (TREE_CODE (decl) == FUNCTION_DECL |
f84b4be9 JM |
5117 | && DECL_TEMPLATE_INSTANTIATION (decl) |
5118 | && TREE_CODE (DECL_TI_TEMPLATE (decl)) != TEMPLATE_DECL) | |
5119 | /* This was a friend declared with an explicit template | |
5120 | argument list, e.g.: | |
c8094d83 | 5121 | |
f84b4be9 | 5122 | friend void f<>(T); |
c8094d83 | 5123 | |
f84b4be9 JM |
5124 | to indicate that f was a template instantiation, not a new |
5125 | function declaration. Now, we have to figure out what | |
5126 | instantiation of what template. */ | |
5127 | { | |
76e57b45 | 5128 | tree template_id, arglist, fns; |
f84b4be9 JM |
5129 | tree new_args; |
5130 | tree tmpl; | |
ed2fa432 | 5131 | tree ns = decl_namespace_context (TYPE_MAIN_DECL (current_class_type)); |
c8094d83 | 5132 | |
76e57b45 | 5133 | /* Friend functions are looked up in the containing namespace scope. |
0cbd7506 MS |
5134 | We must enter that scope, to avoid finding member functions of the |
5135 | current cless with same name. */ | |
76e57b45 NS |
5136 | push_nested_namespace (ns); |
5137 | fns = tsubst_expr (DECL_TI_TEMPLATE (decl), args, | |
0cbd7506 | 5138 | tf_error | tf_warning, NULL_TREE); |
76e57b45 NS |
5139 | pop_nested_namespace (ns); |
5140 | arglist = tsubst (DECL_TI_ARGS (decl), args, | |
0cbd7506 | 5141 | tf_error | tf_warning, NULL_TREE); |
76e57b45 | 5142 | template_id = lookup_template_function (fns, arglist); |
c8094d83 | 5143 | |
c2ea3a40 | 5144 | new_friend = tsubst (decl, args, tf_error | tf_warning, NULL_TREE); |
36a117a5 | 5145 | tmpl = determine_specialization (template_id, new_friend, |
c8094d83 | 5146 | &new_args, |
5fe7b654 GB |
5147 | /*need_member_template=*/0, |
5148 | TREE_VEC_LENGTH (args)); | |
6e432b31 | 5149 | return instantiate_template (tmpl, new_args, tf_error); |
f84b4be9 | 5150 | } |
36a117a5 | 5151 | |
c2ea3a40 | 5152 | new_friend = tsubst (decl, args, tf_error | tf_warning, NULL_TREE); |
c8094d83 | 5153 | |
36a117a5 | 5154 | /* The NEW_FRIEND will look like an instantiation, to the |
f84b4be9 JM |
5155 | compiler, but is not an instantiation from the point of view of |
5156 | the language. For example, we might have had: | |
c8094d83 | 5157 | |
f84b4be9 JM |
5158 | template <class T> struct S { |
5159 | template <class U> friend void f(T, U); | |
5160 | }; | |
c8094d83 | 5161 | |
f84b4be9 JM |
5162 | Then, in S<int>, template <class U> void f(int, U) is not an |
5163 | instantiation of anything. */ | |
ac2b3222 AP |
5164 | if (new_friend == error_mark_node) |
5165 | return error_mark_node; | |
c8094d83 | 5166 | |
f84b4be9 JM |
5167 | DECL_USE_TEMPLATE (new_friend) = 0; |
5168 | if (TREE_CODE (decl) == TEMPLATE_DECL) | |
655dc6ee JM |
5169 | { |
5170 | DECL_USE_TEMPLATE (DECL_TEMPLATE_RESULT (new_friend)) = 0; | |
5171 | DECL_SAVED_TREE (DECL_TEMPLATE_RESULT (new_friend)) | |
5172 | = DECL_SAVED_TREE (DECL_TEMPLATE_RESULT (decl)); | |
5173 | } | |
36a117a5 | 5174 | |
92643fea MM |
5175 | /* The mangled name for the NEW_FRIEND is incorrect. The function |
5176 | is not a template instantiation and should not be mangled like | |
5177 | one. Therefore, we forget the mangling here; we'll recompute it | |
5178 | later if we need it. */ | |
36a117a5 MM |
5179 | if (TREE_CODE (new_friend) != TEMPLATE_DECL) |
5180 | { | |
19e7881c | 5181 | SET_DECL_RTL (new_friend, NULL_RTX); |
92643fea | 5182 | SET_DECL_ASSEMBLER_NAME (new_friend, NULL_TREE); |
36a117a5 | 5183 | } |
c8094d83 | 5184 | |
6eb3bb27 | 5185 | if (DECL_NAMESPACE_SCOPE_P (new_friend)) |
f84b4be9 | 5186 | { |
36a117a5 | 5187 | tree old_decl; |
fbf1c34b MM |
5188 | tree new_friend_template_info; |
5189 | tree new_friend_result_template_info; | |
92da7074 | 5190 | tree ns; |
fbf1c34b MM |
5191 | int new_friend_is_defn; |
5192 | ||
5193 | /* We must save some information from NEW_FRIEND before calling | |
5194 | duplicate decls since that function will free NEW_FRIEND if | |
5195 | possible. */ | |
5196 | new_friend_template_info = DECL_TEMPLATE_INFO (new_friend); | |
5bd61841 | 5197 | new_friend_is_defn = |
c8094d83 | 5198 | (DECL_INITIAL (DECL_TEMPLATE_RESULT |
5bd61841 MM |
5199 | (template_for_substitution (new_friend))) |
5200 | != NULL_TREE); | |
f84b4be9 | 5201 | if (TREE_CODE (new_friend) == TEMPLATE_DECL) |
fbf1c34b MM |
5202 | { |
5203 | /* This declaration is a `primary' template. */ | |
5204 | DECL_PRIMARY_TEMPLATE (new_friend) = new_friend; | |
c8094d83 | 5205 | |
fbf1c34b | 5206 | new_friend_result_template_info |
17aec3eb | 5207 | = DECL_TEMPLATE_INFO (DECL_TEMPLATE_RESULT (new_friend)); |
fbf1c34b MM |
5208 | } |
5209 | else | |
5bd61841 | 5210 | new_friend_result_template_info = NULL_TREE; |
36a117a5 | 5211 | |
1c227897 MM |
5212 | /* Inside pushdecl_namespace_level, we will push into the |
5213 | current namespace. However, the friend function should go | |
c6002625 | 5214 | into the namespace of the template. */ |
92da7074 ML |
5215 | ns = decl_namespace_context (new_friend); |
5216 | push_nested_namespace (ns); | |
d63d5d0c | 5217 | old_decl = pushdecl_namespace_level (new_friend, /*is_friend=*/true); |
92da7074 | 5218 | pop_nested_namespace (ns); |
36a117a5 MM |
5219 | |
5220 | if (old_decl != new_friend) | |
5221 | { | |
5222 | /* This new friend declaration matched an existing | |
5223 | declaration. For example, given: | |
5224 | ||
5225 | template <class T> void f(T); | |
c8094d83 MS |
5226 | template <class U> class C { |
5227 | template <class T> friend void f(T) {} | |
36a117a5 MM |
5228 | }; |
5229 | ||
5230 | the friend declaration actually provides the definition | |
5231 | of `f', once C has been instantiated for some type. So, | |
5232 | old_decl will be the out-of-class template declaration, | |
5233 | while new_friend is the in-class definition. | |
5234 | ||
5235 | But, if `f' was called before this point, the | |
5236 | instantiation of `f' will have DECL_TI_ARGS corresponding | |
5237 | to `T' but not to `U', references to which might appear | |
5238 | in the definition of `f'. Previously, the most general | |
5239 | template for an instantiation of `f' was the out-of-class | |
5240 | version; now it is the in-class version. Therefore, we | |
5241 | run through all specialization of `f', adding to their | |
5242 | DECL_TI_ARGS appropriately. In particular, they need a | |
5243 | new set of outer arguments, corresponding to the | |
c8094d83 | 5244 | arguments for this class instantiation. |
36a117a5 MM |
5245 | |
5246 | The same situation can arise with something like this: | |
5247 | ||
5248 | friend void f(int); | |
c8094d83 | 5249 | template <class T> class C { |
0cbd7506 MS |
5250 | friend void f(T) {} |
5251 | }; | |
36a117a5 MM |
5252 | |
5253 | when `C<int>' is instantiated. Now, `f(int)' is defined | |
5254 | in the class. */ | |
5255 | ||
fbf1c34b MM |
5256 | if (!new_friend_is_defn) |
5257 | /* On the other hand, if the in-class declaration does | |
5258 | *not* provide a definition, then we don't want to alter | |
5259 | existing definitions. We can just leave everything | |
5260 | alone. */ | |
36a117a5 | 5261 | ; |
fbf1c34b | 5262 | else |
36a117a5 | 5263 | { |
fbf1c34b MM |
5264 | /* Overwrite whatever template info was there before, if |
5265 | any, with the new template information pertaining to | |
5266 | the declaration. */ | |
5267 | DECL_TEMPLATE_INFO (old_decl) = new_friend_template_info; | |
5268 | ||
5269 | if (TREE_CODE (old_decl) != TEMPLATE_DECL) | |
8d83f792 MM |
5270 | reregister_specialization (new_friend, |
5271 | most_general_template (old_decl), | |
5272 | old_decl); | |
c8094d83 | 5273 | else |
36a117a5 | 5274 | { |
fbf1c34b MM |
5275 | tree t; |
5276 | tree new_friend_args; | |
5277 | ||
c8094d83 | 5278 | DECL_TEMPLATE_INFO (DECL_TEMPLATE_RESULT (old_decl)) |
fbf1c34b | 5279 | = new_friend_result_template_info; |
c8094d83 | 5280 | |
fbf1c34b | 5281 | new_friend_args = TI_ARGS (new_friend_template_info); |
c8094d83 | 5282 | for (t = DECL_TEMPLATE_SPECIALIZATIONS (old_decl); |
fbf1c34b MM |
5283 | t != NULL_TREE; |
5284 | t = TREE_CHAIN (t)) | |
5285 | { | |
5286 | tree spec = TREE_VALUE (t); | |
c8094d83 MS |
5287 | |
5288 | DECL_TI_ARGS (spec) | |
fbf1c34b MM |
5289 | = add_outermost_template_args (new_friend_args, |
5290 | DECL_TI_ARGS (spec)); | |
fbf1c34b MM |
5291 | } |
5292 | ||
5293 | /* Now, since specializations are always supposed to | |
5294 | hang off of the most general template, we must move | |
5295 | them. */ | |
5296 | t = most_general_template (old_decl); | |
5297 | if (t != old_decl) | |
5298 | { | |
5299 | DECL_TEMPLATE_SPECIALIZATIONS (t) | |
5300 | = chainon (DECL_TEMPLATE_SPECIALIZATIONS (t), | |
5301 | DECL_TEMPLATE_SPECIALIZATIONS (old_decl)); | |
5302 | DECL_TEMPLATE_SPECIALIZATIONS (old_decl) = NULL_TREE; | |
5303 | } | |
36a117a5 MM |
5304 | } |
5305 | } | |
5306 | ||
5307 | /* The information from NEW_FRIEND has been merged into OLD_DECL | |
5308 | by duplicate_decls. */ | |
5309 | new_friend = old_decl; | |
5310 | } | |
f84b4be9 | 5311 | } |
6e432b31 | 5312 | else |
f84b4be9 | 5313 | { |
6e432b31 KL |
5314 | tree context = DECL_CONTEXT (new_friend); |
5315 | bool dependent_p; | |
5316 | ||
5317 | /* In the code | |
5318 | template <class T> class C { | |
5319 | template <class U> friend void C1<U>::f (); // case 1 | |
5320 | friend void C2<T>::f (); // case 2 | |
5321 | }; | |
5322 | we only need to make sure CONTEXT is a complete type for | |
5323 | case 2. To distinguish between the two cases, we note that | |
5324 | CONTEXT of case 1 remains dependent type after tsubst while | |
5325 | this isn't true for case 2. */ | |
5326 | ++processing_template_decl; | |
5327 | dependent_p = dependent_type_p (context); | |
5328 | --processing_template_decl; | |
5329 | ||
5330 | if (!dependent_p | |
5331 | && !complete_type_or_else (context, NULL_TREE)) | |
5332 | return error_mark_node; | |
5333 | ||
5334 | if (COMPLETE_TYPE_P (context)) | |
5335 | { | |
5336 | /* Check to see that the declaration is really present, and, | |
5337 | possibly obtain an improved declaration. */ | |
5338 | tree fn = check_classfn (context, | |
5339 | new_friend, NULL_TREE); | |
5340 | ||
5341 | if (fn) | |
5342 | new_friend = fn; | |
5343 | } | |
f84b4be9 JM |
5344 | } |
5345 | ||
5346 | return new_friend; | |
5347 | } | |
5348 | ||
1aed5355 MM |
5349 | /* FRIEND_TMPL is a friend TEMPLATE_DECL. ARGS is the vector of |
5350 | template arguments, as for tsubst. | |
6757edfe | 5351 | |
dc957d14 | 5352 | Returns an appropriate tsubst'd friend type or error_mark_node on |
4b054b80 | 5353 | failure. */ |
6757edfe MM |
5354 | |
5355 | static tree | |
3a978d72 | 5356 | tsubst_friend_class (tree friend_tmpl, tree args) |
6757edfe | 5357 | { |
1aed5355 | 5358 | tree friend_type; |
25aab5d0 | 5359 | tree tmpl; |
3e0ec82f | 5360 | tree context; |
6757edfe | 5361 | |
3e0ec82f MM |
5362 | context = DECL_CONTEXT (friend_tmpl); |
5363 | ||
5364 | if (context) | |
77adef84 | 5365 | { |
3e0ec82f MM |
5366 | if (TREE_CODE (context) == NAMESPACE_DECL) |
5367 | push_nested_namespace (context); | |
5368 | else | |
c8094d83 | 5369 | push_nested_class (tsubst (context, args, tf_none, NULL_TREE)); |
3e0ec82f | 5370 | } |
25aab5d0 | 5371 | |
3e0ec82f | 5372 | /* First, we look for a class template. */ |
c8094d83 | 5373 | tmpl = lookup_name (DECL_NAME (friend_tmpl), /*prefer_type=*/0); |
25aab5d0 | 5374 | |
3e0ec82f MM |
5375 | /* But, if we don't find one, it might be because we're in a |
5376 | situation like this: | |
77adef84 | 5377 | |
3e0ec82f MM |
5378 | template <class T> |
5379 | struct S { | |
5380 | template <class U> | |
5381 | friend struct S; | |
5382 | }; | |
5383 | ||
5384 | Here, in the scope of (say) S<int>, `S' is bound to a TYPE_DECL | |
5385 | for `S<int>', not the TEMPLATE_DECL. */ | |
5386 | if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl)) | |
5387 | { | |
5388 | tmpl = lookup_name (DECL_NAME (friend_tmpl), /*prefer_type=*/1); | |
5389 | tmpl = maybe_get_template_decl_from_type_decl (tmpl); | |
25aab5d0 | 5390 | } |
6757edfe | 5391 | |
25aab5d0 | 5392 | if (tmpl && DECL_CLASS_TEMPLATE_P (tmpl)) |
6757edfe MM |
5393 | { |
5394 | /* The friend template has already been declared. Just | |
36a117a5 MM |
5395 | check to see that the declarations match, and install any new |
5396 | default parameters. We must tsubst the default parameters, | |
5397 | of course. We only need the innermost template parameters | |
5398 | because that is all that redeclare_class_template will look | |
5399 | at. */ | |
3e0ec82f MM |
5400 | if (TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (friend_tmpl)) |
5401 | > TMPL_ARGS_DEPTH (args)) | |
5402 | { | |
5403 | tree parms; | |
5404 | parms = tsubst_template_parms (DECL_TEMPLATE_PARMS (friend_tmpl), | |
5405 | args, tf_error | tf_warning); | |
5406 | redeclare_class_template (TREE_TYPE (tmpl), parms); | |
5407 | } | |
5408 | ||
6757edfe MM |
5409 | friend_type = TREE_TYPE (tmpl); |
5410 | } | |
5411 | else | |
5412 | { | |
5413 | /* The friend template has not already been declared. In this | |
5414 | case, the instantiation of the template class will cause the | |
5415 | injection of this template into the global scope. */ | |
c2ea3a40 | 5416 | tmpl = tsubst (friend_tmpl, args, tf_error | tf_warning, NULL_TREE); |
6757edfe MM |
5417 | |
5418 | /* The new TMPL is not an instantiation of anything, so we | |
0cbd7506 | 5419 | forget its origins. We don't reset CLASSTYPE_TI_TEMPLATE for |
6757edfe MM |
5420 | the new type because that is supposed to be the corresponding |
5421 | template decl, i.e., TMPL. */ | |
5422 | DECL_USE_TEMPLATE (tmpl) = 0; | |
5423 | DECL_TEMPLATE_INFO (tmpl) = NULL_TREE; | |
5424 | CLASSTYPE_USE_TEMPLATE (TREE_TYPE (tmpl)) = 0; | |
68c78847 KL |
5425 | CLASSTYPE_TI_ARGS (TREE_TYPE (tmpl)) |
5426 | = INNERMOST_TEMPLATE_ARGS (CLASSTYPE_TI_ARGS (TREE_TYPE (tmpl))); | |
6757edfe MM |
5427 | |
5428 | /* Inject this template into the global scope. */ | |
d63d5d0c | 5429 | friend_type = TREE_TYPE (pushdecl_top_level_maybe_friend (tmpl, true)); |
6757edfe MM |
5430 | } |
5431 | ||
c8094d83 | 5432 | if (context) |
3e0ec82f MM |
5433 | { |
5434 | if (TREE_CODE (context) == NAMESPACE_DECL) | |
5435 | pop_nested_namespace (context); | |
5436 | else | |
5437 | pop_nested_class (); | |
5438 | } | |
5439 | ||
6757edfe MM |
5440 | return friend_type; |
5441 | } | |
f84b4be9 | 5442 | |
17f29637 KL |
5443 | /* Returns zero if TYPE cannot be completed later due to circularity. |
5444 | Otherwise returns one. */ | |
5445 | ||
d5372501 | 5446 | static int |
3a978d72 | 5447 | can_complete_type_without_circularity (tree type) |
17f29637 KL |
5448 | { |
5449 | if (type == NULL_TREE || type == error_mark_node) | |
5450 | return 0; | |
5451 | else if (COMPLETE_TYPE_P (type)) | |
5452 | return 1; | |
5453 | else if (TREE_CODE (type) == ARRAY_TYPE && TYPE_DOMAIN (type)) | |
5454 | return can_complete_type_without_circularity (TREE_TYPE (type)); | |
8c6ab2db NS |
5455 | else if (CLASS_TYPE_P (type) |
5456 | && TYPE_BEING_DEFINED (TYPE_MAIN_VARIANT (type))) | |
17f29637 KL |
5457 | return 0; |
5458 | else | |
5459 | return 1; | |
5460 | } | |
5461 | ||
8d08fdba | 5462 | tree |
3a978d72 | 5463 | instantiate_class_template (tree type) |
8d08fdba | 5464 | { |
7088fca9 | 5465 | tree template, args, pattern, t, member; |
36a117a5 | 5466 | tree typedecl; |
dbbf88d1 | 5467 | tree pbinfo; |
cad7e87b | 5468 | tree base_list; |
c8094d83 | 5469 | |
5566b478 | 5470 | if (type == error_mark_node) |
8d08fdba MS |
5471 | return error_mark_node; |
5472 | ||
c8094d83 | 5473 | if (TYPE_BEING_DEFINED (type) |
ca099ac8 MM |
5474 | || COMPLETE_TYPE_P (type) |
5475 | || dependent_type_p (type)) | |
5566b478 MS |
5476 | return type; |
5477 | ||
6bdb985f | 5478 | /* Figure out which template is being instantiated. */ |
36a117a5 | 5479 | template = most_general_template (CLASSTYPE_TI_TEMPLATE (type)); |
50bc768d | 5480 | gcc_assert (TREE_CODE (template) == TEMPLATE_DECL); |
73aad9b9 | 5481 | |
6bdb985f MM |
5482 | /* Figure out which arguments are being used to do the |
5483 | instantiation. */ | |
5484 | args = CLASSTYPE_TI_ARGS (type); | |
4c571114 MM |
5485 | |
5486 | /* Determine what specialization of the original template to | |
5487 | instantiate. */ | |
8fbc5ae7 MM |
5488 | t = most_specialized_class (template, args); |
5489 | if (t == error_mark_node) | |
73aad9b9 | 5490 | { |
8fbc5ae7 | 5491 | const char *str = "candidates are:"; |
0f51ccfc | 5492 | error ("ambiguous class template instantiation for %q#T", type); |
c8094d83 | 5493 | for (t = DECL_TEMPLATE_SPECIALIZATIONS (template); t; |
8fbc5ae7 | 5494 | t = TREE_CHAIN (t)) |
73aad9b9 | 5495 | { |
8c6ab2db | 5496 | if (get_class_bindings (TREE_VALUE (t), TREE_PURPOSE (t), args)) |
73aad9b9 | 5497 | { |
dee15844 | 5498 | error ("%s %+#T", str, TREE_TYPE (t)); |
8fbc5ae7 | 5499 | str = " "; |
73aad9b9 JM |
5500 | } |
5501 | } | |
8fbc5ae7 MM |
5502 | TYPE_BEING_DEFINED (type) = 1; |
5503 | return error_mark_node; | |
73aad9b9 | 5504 | } |
6bdb985f MM |
5505 | |
5506 | if (t) | |
73aad9b9 JM |
5507 | pattern = TREE_TYPE (t); |
5508 | else | |
5509 | pattern = TREE_TYPE (template); | |
5566b478 | 5510 | |
4c571114 MM |
5511 | /* If the template we're instantiating is incomplete, then clearly |
5512 | there's nothing we can do. */ | |
d0f062fb | 5513 | if (!COMPLETE_TYPE_P (pattern)) |
f31c0a32 | 5514 | return type; |
5566b478 | 5515 | |
4c571114 MM |
5516 | /* If we've recursively instantiated too many templates, stop. */ |
5517 | if (! push_tinst_level (type)) | |
f31c0a32 | 5518 | return type; |
4c571114 MM |
5519 | |
5520 | /* Now we're really doing the instantiation. Mark the type as in | |
5521 | the process of being defined. */ | |
5522 | TYPE_BEING_DEFINED (type) = 1; | |
5523 | ||
78757caa KL |
5524 | /* We may be in the middle of deferred access check. Disable |
5525 | it now. */ | |
5526 | push_deferring_access_checks (dk_no_deferred); | |
5527 | ||
c353b8e3 | 5528 | push_to_top_level (); |
4c571114 | 5529 | |
73aad9b9 | 5530 | if (t) |
36a117a5 | 5531 | { |
27631dae | 5532 | /* This TYPE is actually an instantiation of a partial |
36a117a5 MM |
5533 | specialization. We replace the innermost set of ARGS with |
5534 | the arguments appropriate for substitution. For example, | |
5535 | given: | |
5536 | ||
5537 | template <class T> struct S {}; | |
5538 | template <class T> struct S<T*> {}; | |
c8094d83 | 5539 | |
36a117a5 MM |
5540 | and supposing that we are instantiating S<int*>, ARGS will |
5541 | present be {int*} but we need {int}. */ | |
c8094d83 | 5542 | tree inner_args |
36a117a5 MM |
5543 | = get_class_bindings (TREE_VALUE (t), TREE_PURPOSE (t), |
5544 | args); | |
5545 | ||
5546 | /* If there were multiple levels in ARGS, replacing the | |
5547 | innermost level would alter CLASSTYPE_TI_ARGS, which we don't | |
5548 | want, so we make a copy first. */ | |
5549 | if (TMPL_ARGS_HAVE_MULTIPLE_LEVELS (args)) | |
5550 | { | |
5551 | args = copy_node (args); | |
5552 | SET_TMPL_ARGS_LEVEL (args, TMPL_ARGS_DEPTH (args), inner_args); | |
5553 | } | |
5554 | else | |
5555 | args = inner_args; | |
5556 | } | |
8d019cef | 5557 | |
7813d14c | 5558 | SET_CLASSTYPE_INTERFACE_UNKNOWN (type); |
8d08fdba | 5559 | |
68ea098a NS |
5560 | /* Set the input location to the template definition. This is needed |
5561 | if tsubsting causes an error. */ | |
12af7ba3 MM |
5562 | typedecl = TYPE_MAIN_DECL (type); |
5563 | input_location = DECL_SOURCE_LOCATION (typedecl); | |
5564 | in_system_header = DECL_IN_SYSTEM_HEADER (typedecl); | |
68ea098a | 5565 | |
f7da6097 | 5566 | TYPE_HAS_CONSTRUCTOR (type) = TYPE_HAS_CONSTRUCTOR (pattern); |
834c6dff MM |
5567 | TYPE_HAS_NEW_OPERATOR (type) = TYPE_HAS_NEW_OPERATOR (pattern); |
5568 | TYPE_HAS_ARRAY_NEW_OPERATOR (type) = TYPE_HAS_ARRAY_NEW_OPERATOR (pattern); | |
f7da6097 | 5569 | TYPE_GETS_DELETE (type) = TYPE_GETS_DELETE (pattern); |
f7da6097 MS |
5570 | TYPE_HAS_ASSIGN_REF (type) = TYPE_HAS_ASSIGN_REF (pattern); |
5571 | TYPE_HAS_CONST_ASSIGN_REF (type) = TYPE_HAS_CONST_ASSIGN_REF (pattern); | |
f7da6097 MS |
5572 | TYPE_HAS_INIT_REF (type) = TYPE_HAS_INIT_REF (pattern); |
5573 | TYPE_HAS_CONST_INIT_REF (type) = TYPE_HAS_CONST_INIT_REF (pattern); | |
f7da6097 MS |
5574 | TYPE_HAS_DEFAULT_CONSTRUCTOR (type) = TYPE_HAS_DEFAULT_CONSTRUCTOR (pattern); |
5575 | TYPE_HAS_CONVERSION (type) = TYPE_HAS_CONVERSION (pattern); | |
f7da6097 MS |
5576 | TYPE_PACKED (type) = TYPE_PACKED (pattern); |
5577 | TYPE_ALIGN (type) = TYPE_ALIGN (pattern); | |
11cf4d18 | 5578 | TYPE_USER_ALIGN (type) = TYPE_USER_ALIGN (pattern); |
eff71ab0 | 5579 | TYPE_FOR_JAVA (type) = TYPE_FOR_JAVA (pattern); /* For libjava's JArray<T> */ |
6bdb8141 JM |
5580 | if (ANON_AGGR_TYPE_P (pattern)) |
5581 | SET_ANON_AGGR_TYPE_P (type); | |
8d039470 MS |
5582 | if (CLASSTYPE_VISIBILITY_SPECIFIED (pattern)) |
5583 | { | |
5584 | CLASSTYPE_VISIBILITY_SPECIFIED (type) = 1; | |
5585 | CLASSTYPE_VISIBILITY (type) = CLASSTYPE_VISIBILITY (pattern); | |
5586 | } | |
f7da6097 | 5587 | |
dbbf88d1 | 5588 | pbinfo = TYPE_BINFO (pattern); |
1456deaf | 5589 | |
315fb5db NS |
5590 | /* We should never instantiate a nested class before its enclosing |
5591 | class; we need to look up the nested class by name before we can | |
5592 | instantiate it, and that lookup should instantiate the enclosing | |
5593 | class. */ | |
5594 | gcc_assert (!DECL_CLASS_SCOPE_P (TYPE_MAIN_DECL (pattern)) | |
5595 | || COMPLETE_TYPE_P (TYPE_CONTEXT (type)) | |
5596 | || TYPE_BEING_DEFINED (TYPE_CONTEXT (type))); | |
1456deaf | 5597 | |
cad7e87b | 5598 | base_list = NULL_TREE; |
fa743e8c | 5599 | if (BINFO_N_BASE_BINFOS (pbinfo)) |
3fd71a52 | 5600 | { |
fa743e8c | 5601 | tree pbase_binfo; |
a2507277 | 5602 | tree context = TYPE_CONTEXT (type); |
4514aa8c | 5603 | tree pushed_scope; |
3fd71a52 | 5604 | int i; |
5566b478 | 5605 | |
a2507277 NS |
5606 | /* We must enter the scope containing the type, as that is where |
5607 | the accessibility of types named in dependent bases are | |
5608 | looked up from. */ | |
4514aa8c | 5609 | pushed_scope = push_scope (context ? context : global_namespace); |
c8094d83 | 5610 | |
3fd71a52 MM |
5611 | /* Substitute into each of the bases to determine the actual |
5612 | basetypes. */ | |
fa743e8c | 5613 | for (i = 0; BINFO_BASE_ITERATE (pbinfo, i, pbase_binfo); i++) |
3fd71a52 MM |
5614 | { |
5615 | tree base; | |
fa743e8c | 5616 | tree access = BINFO_BASE_ACCESS (pbinfo, i); |
711734a9 | 5617 | |
dc957d14 | 5618 | /* Substitute to figure out the base class. */ |
fa743e8c | 5619 | base = tsubst (BINFO_TYPE (pbase_binfo), args, tf_error, NULL_TREE); |
3fd71a52 MM |
5620 | if (base == error_mark_node) |
5621 | continue; | |
c8094d83 | 5622 | |
3fd71a52 | 5623 | base_list = tree_cons (access, base, base_list); |
fa743e8c | 5624 | if (BINFO_VIRTUAL_P (pbase_binfo)) |
809e3e7f | 5625 | TREE_TYPE (base_list) = integer_type_node; |
3fd71a52 | 5626 | } |
dfbcd65a | 5627 | |
3fd71a52 MM |
5628 | /* The list is now in reverse order; correct that. */ |
5629 | base_list = nreverse (base_list); | |
5630 | ||
4514aa8c NS |
5631 | if (pushed_scope) |
5632 | pop_scope (pushed_scope); | |
3fd71a52 | 5633 | } |
cad7e87b NS |
5634 | /* Now call xref_basetypes to set up all the base-class |
5635 | information. */ | |
5636 | xref_basetypes (type, base_list); | |
5637 | ||
5566b478 | 5638 | |
b74a0560 MM |
5639 | /* Now that our base classes are set up, enter the scope of the |
5640 | class, so that name lookups into base classes, etc. will work | |
dc957d14 | 5641 | correctly. This is precisely analogous to what we do in |
b74a0560 MM |
5642 | begin_class_definition when defining an ordinary non-template |
5643 | class. */ | |
29370796 | 5644 | pushclass (type); |
b74a0560 | 5645 | |
7088fca9 | 5646 | /* Now members are processed in the order of declaration. */ |
8c6ab2db NS |
5647 | for (member = CLASSTYPE_DECL_LIST (pattern); |
5648 | member; member = TREE_CHAIN (member)) | |
8d08fdba | 5649 | { |
7088fca9 | 5650 | tree t = TREE_VALUE (member); |
5566b478 | 5651 | |
7088fca9 | 5652 | if (TREE_PURPOSE (member)) |
ed44da02 | 5653 | { |
7088fca9 KL |
5654 | if (TYPE_P (t)) |
5655 | { | |
5e0c54e5 | 5656 | /* Build new CLASSTYPE_NESTED_UTDS. */ |
8d08fdba | 5657 | |
7088fca9 KL |
5658 | tree tag = t; |
5659 | tree name = TYPE_IDENTIFIER (tag); | |
5660 | tree newtag; | |
883a2bff MM |
5661 | bool class_template_p; |
5662 | ||
5663 | class_template_p = (TREE_CODE (tag) != ENUMERAL_TYPE | |
5664 | && TYPE_LANG_SPECIFIC (tag) | |
5665 | && CLASSTYPE_IS_TEMPLATE (tag)); | |
5666 | /* If the member is a class template, then -- even after | |
6c745393 | 5667 | substitution -- there may be dependent types in the |
883a2bff MM |
5668 | template argument list for the class. We increment |
5669 | PROCESSING_TEMPLATE_DECL so that dependent_type_p, as | |
5670 | that function will assume that no types are dependent | |
5671 | when outside of a template. */ | |
5672 | if (class_template_p) | |
5673 | ++processing_template_decl; | |
7088fca9 | 5674 | newtag = tsubst (tag, args, tf_error, NULL_TREE); |
883a2bff MM |
5675 | if (class_template_p) |
5676 | --processing_template_decl; | |
2620d095 KL |
5677 | if (newtag == error_mark_node) |
5678 | continue; | |
5679 | ||
7088fca9 KL |
5680 | if (TREE_CODE (newtag) != ENUMERAL_TYPE) |
5681 | { | |
883a2bff | 5682 | if (class_template_p) |
7088fca9 KL |
5683 | /* Unfortunately, lookup_template_class sets |
5684 | CLASSTYPE_IMPLICIT_INSTANTIATION for a partial | |
3afd2e20 NS |
5685 | instantiation (i.e., for the type of a member |
5686 | template class nested within a template class.) | |
5687 | This behavior is required for | |
5688 | maybe_process_partial_specialization to work | |
5689 | correctly, but is not accurate in this case; | |
5690 | the TAG is not an instantiation of anything. | |
5691 | (The corresponding TEMPLATE_DECL is an | |
5692 | instantiation, but the TYPE is not.) */ | |
7088fca9 KL |
5693 | CLASSTYPE_USE_TEMPLATE (newtag) = 0; |
5694 | ||
5695 | /* Now, we call pushtag to put this NEWTAG into the scope of | |
5696 | TYPE. We first set up the IDENTIFIER_TYPE_VALUE to avoid | |
5697 | pushtag calling push_template_decl. We don't have to do | |
5698 | this for enums because it will already have been done in | |
5699 | tsubst_enum. */ | |
5700 | if (name) | |
5701 | SET_IDENTIFIER_TYPE_VALUE (name, newtag); | |
bd3d082e | 5702 | pushtag (name, newtag, /*tag_scope=*/ts_current); |
7088fca9 KL |
5703 | } |
5704 | } | |
c8094d83 | 5705 | else if (TREE_CODE (t) == FUNCTION_DECL |
7088fca9 KL |
5706 | || DECL_FUNCTION_TEMPLATE_P (t)) |
5707 | { | |
5708 | /* Build new TYPE_METHODS. */ | |
fecafe5e | 5709 | tree r; |
c8094d83 | 5710 | |
fecafe5e | 5711 | if (TREE_CODE (t) == TEMPLATE_DECL) |
9579624e | 5712 | ++processing_template_decl; |
fecafe5e NS |
5713 | r = tsubst (t, args, tf_error, NULL_TREE); |
5714 | if (TREE_CODE (t) == TEMPLATE_DECL) | |
9579624e | 5715 | --processing_template_decl; |
7088fca9 KL |
5716 | set_current_access_from_decl (r); |
5717 | grok_special_member_properties (r); | |
5718 | finish_member_declaration (r); | |
5719 | } | |
5720 | else | |
5721 | { | |
5722 | /* Build new TYPE_FIELDS. */ | |
fa8d6e85 | 5723 | |
7088fca9 KL |
5724 | if (TREE_CODE (t) != CONST_DECL) |
5725 | { | |
5726 | tree r; | |
fa8d6e85 | 5727 | |
d479d37f NS |
5728 | /* The the file and line for this declaration, to |
5729 | assist in error message reporting. Since we | |
5730 | called push_tinst_level above, we don't need to | |
5731 | restore these. */ | |
f31686a3 | 5732 | input_location = DECL_SOURCE_LOCATION (t); |
fa8d6e85 | 5733 | |
fb5ce3c9 | 5734 | if (TREE_CODE (t) == TEMPLATE_DECL) |
9579624e | 5735 | ++processing_template_decl; |
7088fca9 | 5736 | r = tsubst (t, args, tf_error | tf_warning, NULL_TREE); |
fb5ce3c9 | 5737 | if (TREE_CODE (t) == TEMPLATE_DECL) |
9579624e | 5738 | --processing_template_decl; |
7088fca9 KL |
5739 | if (TREE_CODE (r) == VAR_DECL) |
5740 | { | |
b794e321 MM |
5741 | /* In [temp.inst]: |
5742 | ||
5743 | [t]he initialization (and any associated | |
5744 | side-effects) of a static data member does | |
5745 | not occur unless the static data member is | |
5746 | itself used in a way that requires the | |
5747 | definition of the static data member to | |
5748 | exist. | |
5749 | ||
5750 | Therefore, we do not substitute into the | |
5751 | initialized for the static data member here. */ | |
5752 | finish_static_data_member_decl | |
5753 | (r, | |
5754 | /*init=*/NULL_TREE, | |
5755 | /*asmspec_tree=*/NULL_TREE, | |
5756 | /*flags=*/0); | |
7088fca9 KL |
5757 | if (DECL_INITIALIZED_IN_CLASS_P (r)) |
5758 | check_static_variable_definition (r, TREE_TYPE (r)); | |
5759 | } | |
5760 | else if (TREE_CODE (r) == FIELD_DECL) | |
5761 | { | |
5762 | /* Determine whether R has a valid type and can be | |
5763 | completed later. If R is invalid, then it is | |
5764 | replaced by error_mark_node so that it will not be | |
5765 | added to TYPE_FIELDS. */ | |
5766 | tree rtype = TREE_TYPE (r); | |
5767 | if (can_complete_type_without_circularity (rtype)) | |
5768 | complete_type (rtype); | |
5769 | ||
5770 | if (!COMPLETE_TYPE_P (rtype)) | |
5771 | { | |
5772 | cxx_incomplete_type_error (r, rtype); | |
0cbd7506 | 5773 | r = error_mark_node; |
7088fca9 KL |
5774 | } |
5775 | } | |
5566b478 | 5776 | |
7088fca9 KL |
5777 | /* If it is a TYPE_DECL for a class-scoped ENUMERAL_TYPE, |
5778 | such a thing will already have been added to the field | |
5779 | list by tsubst_enum in finish_member_declaration in the | |
5e0c54e5 | 5780 | CLASSTYPE_NESTED_UTDS case above. */ |
7088fca9 KL |
5781 | if (!(TREE_CODE (r) == TYPE_DECL |
5782 | && TREE_CODE (TREE_TYPE (r)) == ENUMERAL_TYPE | |
43b26a01 | 5783 | && DECL_ARTIFICIAL (r))) |
7088fca9 KL |
5784 | { |
5785 | set_current_access_from_decl (r); | |
5786 | finish_member_declaration (r); | |
5787 | } | |
0cbd7506 | 5788 | } |
7088fca9 | 5789 | } |
61fc8c9e | 5790 | } |
7088fca9 KL |
5791 | else |
5792 | { | |
5793 | if (TYPE_P (t) || DECL_CLASS_TEMPLATE_P (t)) | |
5794 | { | |
5795 | /* Build new CLASSTYPE_FRIEND_CLASSES. */ | |
5796 | ||
5797 | tree friend_type = t; | |
b939a023 | 5798 | bool adjust_processing_template_decl = false; |
1aed5355 | 5799 | |
7088fca9 | 5800 | if (TREE_CODE (friend_type) == TEMPLATE_DECL) |
b939a023 | 5801 | { |
5a24482e | 5802 | /* template <class T> friend class C; */ |
b939a023 | 5803 | friend_type = tsubst_friend_class (friend_type, args); |
0cbd7506 | 5804 | adjust_processing_template_decl = true; |
b939a023 KL |
5805 | } |
5806 | else if (TREE_CODE (friend_type) == UNBOUND_CLASS_TEMPLATE) | |
5807 | { | |
5a24482e | 5808 | /* template <class T> friend class C::D; */ |
b939a023 KL |
5809 | friend_type = tsubst (friend_type, args, |
5810 | tf_error | tf_warning, NULL_TREE); | |
5811 | if (TREE_CODE (friend_type) == TEMPLATE_DECL) | |
5812 | friend_type = TREE_TYPE (friend_type); | |
0cbd7506 | 5813 | adjust_processing_template_decl = true; |
b939a023 KL |
5814 | } |
5815 | else if (TREE_CODE (friend_type) == TYPENAME_TYPE) | |
5816 | { | |
5a24482e KL |
5817 | /* This could be either |
5818 | ||
5819 | friend class T::C; | |
5820 | ||
5821 | when dependent_type_p is false or | |
5822 | ||
5823 | template <class U> friend class T::C; | |
5824 | ||
5825 | otherwise. */ | |
b939a023 KL |
5826 | friend_type = tsubst (friend_type, args, |
5827 | tf_error | tf_warning, NULL_TREE); | |
5828 | /* Bump processing_template_decl for correct | |
5829 | dependent_type_p calculation. */ | |
5830 | ++processing_template_decl; | |
5831 | if (dependent_type_p (friend_type)) | |
5832 | adjust_processing_template_decl = true; | |
5833 | --processing_template_decl; | |
5834 | } | |
5a24482e KL |
5835 | else if (!CLASSTYPE_USE_TEMPLATE (friend_type) |
5836 | && hidden_name_p (TYPE_NAME (friend_type))) | |
7088fca9 | 5837 | { |
5a24482e KL |
5838 | /* friend class C; |
5839 | ||
5840 | where C hasn't been declared yet. Let's lookup name | |
5841 | from namespace scope directly, bypassing any name that | |
5842 | come from dependent base class. */ | |
7088fca9 KL |
5843 | tree ns = decl_namespace_context (TYPE_MAIN_DECL (friend_type)); |
5844 | ||
5845 | /* The call to xref_tag_from_type does injection for friend | |
5846 | classes. */ | |
5847 | push_nested_namespace (ns); | |
c8094d83 MS |
5848 | friend_type = |
5849 | xref_tag_from_type (friend_type, NULL_TREE, | |
5a24482e | 5850 | /*tag_scope=*/ts_current); |
7088fca9 KL |
5851 | pop_nested_namespace (ns); |
5852 | } | |
5a24482e KL |
5853 | else if (uses_template_parms (friend_type)) |
5854 | /* friend class C<T>; */ | |
5855 | friend_type = tsubst (friend_type, args, | |
5856 | tf_error | tf_warning, NULL_TREE); | |
5857 | /* Otherwise it's | |
5858 | ||
5859 | friend class C; | |
5860 | ||
5861 | where C is already declared or | |
5862 | ||
5863 | friend class C<int>; | |
5864 | ||
0cbd7506 | 5865 | We don't have to do anything in these cases. */ |
1aed5355 | 5866 | |
b939a023 | 5867 | if (adjust_processing_template_decl) |
7088fca9 KL |
5868 | /* Trick make_friend_class into realizing that the friend |
5869 | we're adding is a template, not an ordinary class. It's | |
5870 | important that we use make_friend_class since it will | |
5871 | perform some error-checking and output cross-reference | |
5872 | information. */ | |
5873 | ++processing_template_decl; | |
fc378698 | 5874 | |
b939a023 | 5875 | if (friend_type != error_mark_node) |
0cbd7506 | 5876 | make_friend_class (type, friend_type, /*complain=*/false); |
fc378698 | 5877 | |
b939a023 | 5878 | if (adjust_processing_template_decl) |
7088fca9 KL |
5879 | --processing_template_decl; |
5880 | } | |
5881 | else | |
9579624e KL |
5882 | { |
5883 | /* Build new DECL_FRIENDLIST. */ | |
5884 | tree r; | |
5885 | ||
6e432b31 KL |
5886 | /* The the file and line for this declaration, to |
5887 | assist in error message reporting. Since we | |
5888 | called push_tinst_level above, we don't need to | |
5889 | restore these. */ | |
5890 | input_location = DECL_SOURCE_LOCATION (t); | |
5891 | ||
9579624e | 5892 | if (TREE_CODE (t) == TEMPLATE_DECL) |
cad7e87b NS |
5893 | { |
5894 | ++processing_template_decl; | |
5895 | push_deferring_access_checks (dk_no_check); | |
5896 | } | |
c8094d83 | 5897 | |
9579624e | 5898 | r = tsubst_friend_function (t, args); |
9579624e | 5899 | add_friend (type, r, /*complain=*/false); |
cad7e87b NS |
5900 | if (TREE_CODE (t) == TEMPLATE_DECL) |
5901 | { | |
5902 | pop_deferring_access_checks (); | |
5903 | --processing_template_decl; | |
5904 | } | |
9579624e | 5905 | } |
7088fca9 KL |
5906 | } |
5907 | } | |
5566b478 | 5908 | |
61a127b3 MM |
5909 | /* Set the file and line number information to whatever is given for |
5910 | the class itself. This puts error messages involving generated | |
5911 | implicit functions at a predictable point, and the same point | |
5912 | that would be used for non-template classes. */ | |
f31686a3 | 5913 | input_location = DECL_SOURCE_LOCATION (typedecl); |
6de9cd9a | 5914 | |
61a127b3 | 5915 | unreverse_member_declarations (type); |
9f33663b | 5916 | finish_struct_1 (type); |
5524676d | 5917 | TYPE_BEING_DEFINED (type) = 0; |
8d08fdba | 5918 | |
9188c363 MM |
5919 | /* Now that the class is complete, instantiate default arguments for |
5920 | any member functions. We don't do this earlier because the | |
5921 | default arguments may reference members of the class. */ | |
5922 | if (!PRIMARY_TEMPLATE_P (template)) | |
5923 | for (t = TYPE_METHODS (type); t; t = TREE_CHAIN (t)) | |
c8094d83 | 5924 | if (TREE_CODE (t) == FUNCTION_DECL |
dc957d14 | 5925 | /* Implicitly generated member functions will not have template |
9188c363 MM |
5926 | information; they are not instantiations, but instead are |
5927 | created "fresh" for each instantiation. */ | |
5928 | && DECL_TEMPLATE_INFO (t)) | |
5929 | tsubst_default_arguments (t); | |
5930 | ||
b74a0560 | 5931 | popclass (); |
5566b478 | 5932 | pop_from_top_level (); |
78757caa | 5933 | pop_deferring_access_checks (); |
5566b478 MS |
5934 | pop_tinst_level (); |
5935 | ||
4684cd27 MM |
5936 | /* The vtable for a template class can be emitted in any translation |
5937 | unit in which the class is instantiated. When there is no key | |
5938 | method, however, finish_struct_1 will already have added TYPE to | |
5939 | the keyed_classes list. */ | |
5940 | if (TYPE_CONTAINS_VPTR_P (type) && CLASSTYPE_KEY_METHOD (type)) | |
9aad8f83 MA |
5941 | keyed_classes = tree_cons (NULL_TREE, type, keyed_classes); |
5942 | ||
5566b478 | 5943 | return type; |
8d08fdba MS |
5944 | } |
5945 | ||
00d3396f | 5946 | static tree |
a91db711 | 5947 | tsubst_template_arg (tree t, tree args, tsubst_flags_t complain, tree in_decl) |
00d3396f | 5948 | { |
a91db711 | 5949 | tree r; |
c8094d83 | 5950 | |
a91db711 NS |
5951 | if (!t) |
5952 | r = t; | |
5953 | else if (TYPE_P (t)) | |
5954 | r = tsubst (t, args, complain, in_decl); | |
5955 | else | |
00d3396f | 5956 | { |
a91db711 | 5957 | r = tsubst_expr (t, args, complain, in_decl); |
6f25cb35 | 5958 | r = fold_non_dependent_expr (r); |
bd83b409 | 5959 | } |
a91db711 | 5960 | return r; |
bd83b409 NS |
5961 | } |
5962 | ||
a91db711 | 5963 | /* Substitute ARGS into the vector or list of template arguments T. */ |
830bfa74 | 5964 | |
e9659ab0 | 5965 | static tree |
a91db711 | 5966 | tsubst_template_args (tree t, tree args, tsubst_flags_t complain, tree in_decl) |
830bfa74 | 5967 | { |
bf12d54d | 5968 | int len = TREE_VEC_LENGTH (t); |
a91db711 | 5969 | int need_new = 0, i; |
c68b0a84 | 5970 | tree *elts = alloca (len * sizeof (tree)); |
c8094d83 | 5971 | |
830bfa74 MM |
5972 | for (i = 0; i < len; i++) |
5973 | { | |
bf12d54d NS |
5974 | tree orig_arg = TREE_VEC_ELT (t, i); |
5975 | tree new_arg; | |
a91db711 | 5976 | |
bf12d54d NS |
5977 | if (TREE_CODE (orig_arg) == TREE_VEC) |
5978 | new_arg = tsubst_template_args (orig_arg, args, complain, in_decl); | |
830bfa74 | 5979 | else |
a91db711 | 5980 | new_arg = tsubst_template_arg (orig_arg, args, complain, in_decl); |
c8094d83 | 5981 | |
a91db711 | 5982 | if (new_arg == error_mark_node) |
08e72a19 JM |
5983 | return error_mark_node; |
5984 | ||
a91db711 NS |
5985 | elts[i] = new_arg; |
5986 | if (new_arg != orig_arg) | |
830bfa74 MM |
5987 | need_new = 1; |
5988 | } | |
c8094d83 | 5989 | |
830bfa74 MM |
5990 | if (!need_new) |
5991 | return t; | |
a91db711 | 5992 | |
bf12d54d NS |
5993 | t = make_tree_vec (len); |
5994 | for (i = 0; i < len; i++) | |
5995 | TREE_VEC_ELT (t, i) = elts[i]; | |
c8094d83 | 5996 | |
830bfa74 MM |
5997 | return t; |
5998 | } | |
5999 | ||
36a117a5 MM |
6000 | /* Return the result of substituting ARGS into the template parameters |
6001 | given by PARMS. If there are m levels of ARGS and m + n levels of | |
6002 | PARMS, then the result will contain n levels of PARMS. For | |
6003 | example, if PARMS is `template <class T> template <class U> | |
6004 | template <T*, U, class V>' and ARGS is {{int}, {double}} then the | |
6005 | result will be `template <int*, double, class V>'. */ | |
6006 | ||
e9659ab0 | 6007 | static tree |
3a978d72 | 6008 | tsubst_template_parms (tree parms, tree args, tsubst_flags_t complain) |
36a117a5 | 6009 | { |
f71f87f9 MM |
6010 | tree r = NULL_TREE; |
6011 | tree* new_parms; | |
36a117a5 | 6012 | |
8ca4bf25 MM |
6013 | /* When substituting into a template, we must set |
6014 | PROCESSING_TEMPLATE_DECL as the template parameters may be | |
6015 | dependent if they are based on one-another, and the dependency | |
6016 | predicates are short-circuit outside of templates. */ | |
6017 | ++processing_template_decl; | |
6018 | ||
36a117a5 MM |
6019 | for (new_parms = &r; |
6020 | TMPL_PARMS_DEPTH (parms) > TMPL_ARGS_DEPTH (args); | |
6021 | new_parms = &(TREE_CHAIN (*new_parms)), | |
6022 | parms = TREE_CHAIN (parms)) | |
6023 | { | |
c8094d83 | 6024 | tree new_vec = |
36a117a5 MM |
6025 | make_tree_vec (TREE_VEC_LENGTH (TREE_VALUE (parms))); |
6026 | int i; | |
c8094d83 | 6027 | |
36a117a5 MM |
6028 | for (i = 0; i < TREE_VEC_LENGTH (new_vec); ++i) |
6029 | { | |
833aa4c4 NS |
6030 | tree tuple = TREE_VEC_ELT (TREE_VALUE (parms), i); |
6031 | tree default_value = TREE_PURPOSE (tuple); | |
6032 | tree parm_decl = TREE_VALUE (tuple); | |
6033 | ||
6034 | parm_decl = tsubst (parm_decl, args, complain, NULL_TREE); | |
a207780f VR |
6035 | if (TREE_CODE (parm_decl) == PARM_DECL |
6036 | && invalid_nontype_parm_type_p (TREE_TYPE (parm_decl), complain)) | |
6037 | parm_decl = error_mark_node; | |
a91db711 NS |
6038 | default_value = tsubst_template_arg (default_value, args, |
6039 | complain, NULL_TREE); | |
c8094d83 | 6040 | |
a91db711 | 6041 | tuple = build_tree_list (default_value, parm_decl); |
833aa4c4 | 6042 | TREE_VEC_ELT (new_vec, i) = tuple; |
36a117a5 | 6043 | } |
c8094d83 MS |
6044 | |
6045 | *new_parms = | |
6046 | tree_cons (size_int (TMPL_PARMS_DEPTH (parms) | |
4890c2f4 | 6047 | - TMPL_ARGS_DEPTH (args)), |
36a117a5 MM |
6048 | new_vec, NULL_TREE); |
6049 | } | |
6050 | ||
8ca4bf25 MM |
6051 | --processing_template_decl; |
6052 | ||
36a117a5 MM |
6053 | return r; |
6054 | } | |
6055 | ||
ed44da02 MM |
6056 | /* Substitute the ARGS into the indicated aggregate (or enumeration) |
6057 | type T. If T is not an aggregate or enumeration type, it is | |
6058 | handled as if by tsubst. IN_DECL is as for tsubst. If | |
838dfd8a | 6059 | ENTERING_SCOPE is nonzero, T is the context for a template which |
dc957d14 | 6060 | we are presently tsubst'ing. Return the substituted value. */ |
36a117a5 | 6061 | |
e9659ab0 | 6062 | static tree |
c8094d83 | 6063 | tsubst_aggr_type (tree t, |
0cbd7506 MS |
6064 | tree args, |
6065 | tsubst_flags_t complain, | |
6066 | tree in_decl, | |
6067 | int entering_scope) | |
36a117a5 MM |
6068 | { |
6069 | if (t == NULL_TREE) | |
6070 | return NULL_TREE; | |
6071 | ||
6072 | switch (TREE_CODE (t)) | |
6073 | { | |
6074 | case RECORD_TYPE: | |
6075 | if (TYPE_PTRMEMFUNC_P (t)) | |
46c895ac | 6076 | return tsubst (TYPE_PTRMEMFUNC_FN_TYPE (t), args, complain, in_decl); |
36a117a5 | 6077 | |
f4f206f4 | 6078 | /* Else fall through. */ |
ed44da02 | 6079 | case ENUMERAL_TYPE: |
36a117a5 | 6080 | case UNION_TYPE: |
5db698f6 | 6081 | if (TYPE_TEMPLATE_INFO (t)) |
36a117a5 MM |
6082 | { |
6083 | tree argvec; | |
6084 | tree context; | |
6085 | tree r; | |
3489ea0c MM |
6086 | bool saved_skip_evaluation; |
6087 | ||
6088 | /* In "sizeof(X<I>)" we need to evaluate "I". */ | |
6089 | saved_skip_evaluation = skip_evaluation; | |
6090 | skip_evaluation = false; | |
36a117a5 MM |
6091 | |
6092 | /* First, determine the context for the type we are looking | |
6093 | up. */ | |
4f7847ca NS |
6094 | context = TYPE_CONTEXT (t); |
6095 | if (context) | |
6096 | context = tsubst_aggr_type (context, args, complain, | |
36a117a5 | 6097 | in_decl, /*entering_scope=*/1); |
36a117a5 MM |
6098 | |
6099 | /* Then, figure out what arguments are appropriate for the | |
6100 | type we are trying to find. For example, given: | |
6101 | ||
6102 | template <class T> struct S; | |
6103 | template <class T, class U> void f(T, U) { S<U> su; } | |
6104 | ||
6105 | and supposing that we are instantiating f<int, double>, | |
6106 | then our ARGS will be {int, double}, but, when looking up | |
6107 | S we only want {double}. */ | |
a91db711 NS |
6108 | argvec = tsubst_template_args (TYPE_TI_ARGS (t), args, |
6109 | complain, in_decl); | |
08e72a19 | 6110 | if (argvec == error_mark_node) |
3489ea0c MM |
6111 | r = error_mark_node; |
6112 | else | |
6113 | { | |
6114 | r = lookup_template_class (t, argvec, in_decl, context, | |
6115 | entering_scope, complain); | |
6116 | r = cp_build_qualified_type_real (r, TYPE_QUALS (t), complain); | |
6117 | } | |
6118 | ||
6119 | skip_evaluation = saved_skip_evaluation; | |
36a117a5 | 6120 | |
3489ea0c | 6121 | return r; |
36a117a5 | 6122 | } |
c8094d83 | 6123 | else |
36a117a5 MM |
6124 | /* This is not a template type, so there's nothing to do. */ |
6125 | return t; | |
6126 | ||
6127 | default: | |
4393e105 | 6128 | return tsubst (t, args, complain, in_decl); |
36a117a5 MM |
6129 | } |
6130 | } | |
6131 | ||
9188c363 MM |
6132 | /* Substitute into the default argument ARG (a default argument for |
6133 | FN), which has the indicated TYPE. */ | |
6134 | ||
6135 | tree | |
3a978d72 | 6136 | tsubst_default_argument (tree fn, tree type, tree arg) |
9188c363 | 6137 | { |
2436b51f MM |
6138 | tree saved_class_ptr = NULL_TREE; |
6139 | tree saved_class_ref = NULL_TREE; | |
6140 | ||
9188c363 MM |
6141 | /* This default argument came from a template. Instantiate the |
6142 | default argument here, not in tsubst. In the case of | |
c8094d83 MS |
6143 | something like: |
6144 | ||
9188c363 MM |
6145 | template <class T> |
6146 | struct S { | |
6147 | static T t(); | |
6148 | void f(T = t()); | |
6149 | }; | |
c8094d83 | 6150 | |
9188c363 | 6151 | we must be careful to do name lookup in the scope of S<T>, |
d5a10cf0 | 6152 | rather than in the current class. */ |
2b59fc25 | 6153 | push_access_scope (fn); |
2436b51f MM |
6154 | /* The "this" pointer is not valid in a default argument. */ |
6155 | if (cfun) | |
6156 | { | |
6157 | saved_class_ptr = current_class_ptr; | |
6158 | cp_function_chain->x_current_class_ptr = NULL_TREE; | |
6159 | saved_class_ref = current_class_ref; | |
6160 | cp_function_chain->x_current_class_ref = NULL_TREE; | |
6161 | } | |
9188c363 | 6162 | |
d5a10cf0 | 6163 | push_deferring_access_checks(dk_no_deferred); |
c2ea3a40 NS |
6164 | arg = tsubst_expr (arg, DECL_TI_ARGS (fn), |
6165 | tf_error | tf_warning, NULL_TREE); | |
d5a10cf0 MM |
6166 | pop_deferring_access_checks(); |
6167 | ||
2436b51f MM |
6168 | /* Restore the "this" pointer. */ |
6169 | if (cfun) | |
6170 | { | |
6171 | cp_function_chain->x_current_class_ptr = saved_class_ptr; | |
6172 | cp_function_chain->x_current_class_ref = saved_class_ref; | |
6173 | } | |
6174 | ||
2b59fc25 | 6175 | pop_access_scope (fn); |
9188c363 MM |
6176 | |
6177 | /* Make sure the default argument is reasonable. */ | |
6178 | arg = check_default_argument (type, arg); | |
6179 | ||
6180 | return arg; | |
6181 | } | |
6182 | ||
6183 | /* Substitute into all the default arguments for FN. */ | |
6184 | ||
6185 | static void | |
3a978d72 | 6186 | tsubst_default_arguments (tree fn) |
9188c363 MM |
6187 | { |
6188 | tree arg; | |
6189 | tree tmpl_args; | |
6190 | ||
6191 | tmpl_args = DECL_TI_ARGS (fn); | |
6192 | ||
6193 | /* If this function is not yet instantiated, we certainly don't need | |
6194 | its default arguments. */ | |
6195 | if (uses_template_parms (tmpl_args)) | |
6196 | return; | |
6197 | ||
c8094d83 MS |
6198 | for (arg = TYPE_ARG_TYPES (TREE_TYPE (fn)); |
6199 | arg; | |
9188c363 MM |
6200 | arg = TREE_CHAIN (arg)) |
6201 | if (TREE_PURPOSE (arg)) | |
c8094d83 | 6202 | TREE_PURPOSE (arg) = tsubst_default_argument (fn, |
9188c363 MM |
6203 | TREE_VALUE (arg), |
6204 | TREE_PURPOSE (arg)); | |
6205 | } | |
6206 | ||
fc6a28d7 MM |
6207 | /* Substitute the ARGS into the T, which is a _DECL. Return the |
6208 | result of the substitution. Issue error and warning messages under | |
6209 | control of COMPLAIN. */ | |
00d3396f | 6210 | |
e9659ab0 | 6211 | static tree |
fc6a28d7 | 6212 | tsubst_decl (tree t, tree args, tsubst_flags_t complain) |
8d08fdba | 6213 | { |
82a98427 | 6214 | location_t saved_loc; |
b370501f | 6215 | tree r = NULL_TREE; |
4b2811e9 | 6216 | tree in_decl = t; |
830bfa74 | 6217 | |
ae58fa02 | 6218 | /* Set the filename and linenumber to improve error-reporting. */ |
82a98427 | 6219 | saved_loc = input_location; |
f31686a3 | 6220 | input_location = DECL_SOURCE_LOCATION (t); |
b7484fbe | 6221 | |
8d08fdba MS |
6222 | switch (TREE_CODE (t)) |
6223 | { | |
98c1c668 JM |
6224 | case TEMPLATE_DECL: |
6225 | { | |
28e42b7e KL |
6226 | /* We can get here when processing a member function template, |
6227 | member class template, and template template parameter of | |
6228 | a template class. */ | |
98c1c668 | 6229 | tree decl = DECL_TEMPLATE_RESULT (t); |
386b8a85 | 6230 | tree spec; |
28e42b7e KL |
6231 | tree tmpl_args; |
6232 | tree full_args; | |
98c1c668 | 6233 | |
28e42b7e | 6234 | if (DECL_TEMPLATE_TEMPLATE_PARM_P (t)) |
db2767b6 | 6235 | { |
28e42b7e KL |
6236 | /* Template template parameter is treated here. */ |
6237 | tree new_type = tsubst (TREE_TYPE (t), args, complain, in_decl); | |
6238 | if (new_type == error_mark_node) | |
6239 | return error_mark_node; | |
36a117a5 | 6240 | |
28e42b7e KL |
6241 | r = copy_decl (t); |
6242 | TREE_CHAIN (r) = NULL_TREE; | |
6243 | TREE_TYPE (r) = new_type; | |
6244 | DECL_TEMPLATE_RESULT (r) | |
6245 | = build_decl (TYPE_DECL, DECL_NAME (decl), new_type); | |
c8094d83 | 6246 | DECL_TEMPLATE_PARMS (r) |
28e42b7e KL |
6247 | = tsubst_template_parms (DECL_TEMPLATE_PARMS (t), args, |
6248 | complain); | |
6249 | TYPE_NAME (new_type) = r; | |
6250 | break; | |
6251 | } | |
36a117a5 | 6252 | |
28e42b7e KL |
6253 | /* We might already have an instance of this template. |
6254 | The ARGS are for the surrounding class type, so the | |
6255 | full args contain the tsubst'd args for the context, | |
6256 | plus the innermost args from the template decl. */ | |
c8094d83 | 6257 | tmpl_args = DECL_CLASS_TEMPLATE_P (t) |
28e42b7e KL |
6258 | ? CLASSTYPE_TI_ARGS (TREE_TYPE (t)) |
6259 | : DECL_TI_ARGS (DECL_TEMPLATE_RESULT (t)); | |
8ca4bf25 MM |
6260 | /* Because this is a template, the arguments will still be |
6261 | dependent, even after substitution. If | |
6262 | PROCESSING_TEMPLATE_DECL is not set, the dependency | |
6263 | predicates will short-circuit. */ | |
6264 | ++processing_template_decl; | |
28e42b7e KL |
6265 | full_args = tsubst_template_args (tmpl_args, args, |
6266 | complain, in_decl); | |
8ca4bf25 | 6267 | --processing_template_decl; |
bf2f7328 VR |
6268 | if (full_args == error_mark_node) |
6269 | return error_mark_node; | |
28e42b7e KL |
6270 | |
6271 | /* tsubst_template_args doesn't copy the vector if | |
6272 | nothing changed. But, *something* should have | |
6273 | changed. */ | |
6274 | gcc_assert (full_args != tmpl_args); | |
6275 | ||
6276 | spec = retrieve_specialization (t, full_args, | |
6277 | /*class_specializations_p=*/true); | |
6278 | if (spec != NULL_TREE) | |
6279 | { | |
6280 | r = spec; | |
6281 | break; | |
db2767b6 | 6282 | } |
98c1c668 JM |
6283 | |
6284 | /* Make a new template decl. It will be similar to the | |
c8094d83 | 6285 | original, but will record the current template arguments. |
98c1c668 JM |
6286 | We also create a new function declaration, which is just |
6287 | like the old one, but points to this new template, rather | |
6288 | than the old one. */ | |
0acf7199 | 6289 | r = copy_decl (t); |
50bc768d | 6290 | gcc_assert (DECL_LANG_SPECIFIC (r) != 0); |
ae58fa02 | 6291 | TREE_CHAIN (r) = NULL_TREE; |
db2767b6 | 6292 | |
ae58fa02 | 6293 | DECL_TEMPLATE_INFO (r) = build_tree_list (t, args); |
93cdc044 JM |
6294 | |
6295 | if (TREE_CODE (decl) == TYPE_DECL) | |
6296 | { | |
8ca4bf25 MM |
6297 | tree new_type; |
6298 | ++processing_template_decl; | |
6299 | new_type = tsubst (TREE_TYPE (t), args, complain, in_decl); | |
6300 | --processing_template_decl; | |
2620d095 KL |
6301 | if (new_type == error_mark_node) |
6302 | return error_mark_node; | |
6303 | ||
ae58fa02 MM |
6304 | TREE_TYPE (r) = new_type; |
6305 | CLASSTYPE_TI_TEMPLATE (new_type) = r; | |
17aec3eb | 6306 | DECL_TEMPLATE_RESULT (r) = TYPE_MAIN_DECL (new_type); |
ae58fa02 | 6307 | DECL_TI_ARGS (r) = CLASSTYPE_TI_ARGS (new_type); |
8ca4bf25 | 6308 | DECL_CONTEXT (r) = TYPE_CONTEXT (new_type); |
93cdc044 JM |
6309 | } |
6310 | else | |
6311 | { | |
8ca4bf25 MM |
6312 | tree new_decl; |
6313 | ++processing_template_decl; | |
6314 | new_decl = tsubst (decl, args, complain, in_decl); | |
6315 | --processing_template_decl; | |
caec1dc0 KL |
6316 | if (new_decl == error_mark_node) |
6317 | return error_mark_node; | |
17aec3eb RK |
6318 | |
6319 | DECL_TEMPLATE_RESULT (r) = new_decl; | |
ae58fa02 MM |
6320 | DECL_TI_TEMPLATE (new_decl) = r; |
6321 | TREE_TYPE (r) = TREE_TYPE (new_decl); | |
6322 | DECL_TI_ARGS (r) = DECL_TI_ARGS (new_decl); | |
8ca4bf25 | 6323 | DECL_CONTEXT (r) = DECL_CONTEXT (new_decl); |
93cdc044 JM |
6324 | } |
6325 | ||
ae58fa02 MM |
6326 | SET_DECL_IMPLICIT_INSTANTIATION (r); |
6327 | DECL_TEMPLATE_INSTANTIATIONS (r) = NULL_TREE; | |
6328 | DECL_TEMPLATE_SPECIALIZATIONS (r) = NULL_TREE; | |
98c1c668 JM |
6329 | |
6330 | /* The template parameters for this new template are all the | |
6331 | template parameters for the old template, except the | |
c6002625 | 6332 | outermost level of parameters. */ |
c8094d83 | 6333 | DECL_TEMPLATE_PARMS (r) |
4393e105 | 6334 | = tsubst_template_parms (DECL_TEMPLATE_PARMS (t), args, |
c2ea3a40 | 6335 | complain); |
98c1c668 | 6336 | |
93cdc044 | 6337 | if (PRIMARY_TEMPLATE_P (t)) |
ae58fa02 | 6338 | DECL_PRIMARY_TEMPLATE (r) = r; |
93cdc044 | 6339 | |
8c6ab2db NS |
6340 | if (TREE_CODE (decl) != TYPE_DECL) |
6341 | /* Record this non-type partial instantiation. */ | |
c8094d83 | 6342 | register_specialization (r, t, |
d63d5d0c ILT |
6343 | DECL_TI_ARGS (DECL_TEMPLATE_RESULT (r)), |
6344 | false); | |
98c1c668 | 6345 | } |
ae58fa02 | 6346 | break; |
8d08fdba MS |
6347 | |
6348 | case FUNCTION_DECL: | |
6349 | { | |
386b8a85 | 6350 | tree ctx; |
87603ed0 | 6351 | tree argvec = NULL_TREE; |
cf38f48a | 6352 | tree *friends; |
36a117a5 | 6353 | tree gen_tmpl; |
fc6a28d7 | 6354 | tree type; |
5566b478 | 6355 | int member; |
d8c4447d MM |
6356 | int args_depth; |
6357 | int parms_depth; | |
5566b478 | 6358 | |
36a117a5 | 6359 | /* Nobody should be tsubst'ing into non-template functions. */ |
50bc768d | 6360 | gcc_assert (DECL_TEMPLATE_INFO (t) != NULL_TREE); |
36a117a5 MM |
6361 | |
6362 | if (TREE_CODE (DECL_TI_TEMPLATE (t)) == TEMPLATE_DECL) | |
6363 | { | |
6364 | tree spec; | |
00cf3e31 MM |
6365 | bool dependent_p; |
6366 | ||
6367 | /* If T is not dependent, just return it. We have to | |
6368 | increment PROCESSING_TEMPLATE_DECL because | |
6369 | value_dependent_expression_p assumes that nothing is | |
6370 | dependent when PROCESSING_TEMPLATE_DECL is zero. */ | |
6371 | ++processing_template_decl; | |
6372 | dependent_p = value_dependent_expression_p (t); | |
6373 | --processing_template_decl; | |
6374 | if (!dependent_p) | |
6375 | return t; | |
36a117a5 MM |
6376 | |
6377 | /* Calculate the most general template of which R is a | |
6378 | specialization, and the complete set of arguments used to | |
6379 | specialize R. */ | |
6380 | gen_tmpl = most_general_template (DECL_TI_TEMPLATE (t)); | |
c8094d83 | 6381 | argvec = tsubst_template_args (DECL_TI_ARGS |
a91db711 | 6382 | (DECL_TEMPLATE_RESULT (gen_tmpl)), |
c8094d83 | 6383 | args, complain, in_decl); |
36a117a5 MM |
6384 | |
6385 | /* Check to see if we already have this specialization. */ | |
c7222c02 MM |
6386 | spec = retrieve_specialization (gen_tmpl, argvec, |
6387 | /*class_specializations_p=*/false); | |
7ddedda4 | 6388 | |
36a117a5 | 6389 | if (spec) |
ae58fa02 MM |
6390 | { |
6391 | r = spec; | |
6392 | break; | |
6393 | } | |
d8c4447d | 6394 | |
f9a7ae04 MM |
6395 | /* We can see more levels of arguments than parameters if |
6396 | there was a specialization of a member template, like | |
6397 | this: | |
6398 | ||
0cbd7506 | 6399 | template <class T> struct S { template <class U> void f(); } |
c8094d83 | 6400 | template <> template <class U> void S<int>::f(U); |
f9a7ae04 | 6401 | |
dc957d14 | 6402 | Here, we'll be substituting into the specialization, |
f9a7ae04 MM |
6403 | because that's where we can find the code we actually |
6404 | want to generate, but we'll have enough arguments for | |
c8094d83 | 6405 | the most general template. |
f9a7ae04 MM |
6406 | |
6407 | We also deal with the peculiar case: | |
d8c4447d | 6408 | |
c8094d83 | 6409 | template <class T> struct S { |
d8c4447d MM |
6410 | template <class U> friend void f(); |
6411 | }; | |
74b846e0 | 6412 | template <class U> void f() {} |
d8c4447d MM |
6413 | template S<int>; |
6414 | template void f<double>(); | |
6415 | ||
6416 | Here, the ARGS for the instantiation of will be {int, | |
6417 | double}. But, we only need as many ARGS as there are | |
6418 | levels of template parameters in CODE_PATTERN. We are | |
6419 | careful not to get fooled into reducing the ARGS in | |
6420 | situations like: | |
6421 | ||
6422 | template <class T> struct S { template <class U> void f(U); } | |
6423 | template <class T> template <> void S<T>::f(int) {} | |
6424 | ||
6425 | which we can spot because the pattern will be a | |
6426 | specialization in this case. */ | |
6427 | args_depth = TMPL_ARGS_DEPTH (args); | |
c8094d83 MS |
6428 | parms_depth = |
6429 | TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (DECL_TI_TEMPLATE (t))); | |
d8c4447d MM |
6430 | if (args_depth > parms_depth |
6431 | && !DECL_TEMPLATE_SPECIALIZATION (t)) | |
f9a7ae04 | 6432 | args = get_innermost_template_args (args, parms_depth); |
36a117a5 MM |
6433 | } |
6434 | else | |
6435 | { | |
6436 | /* This special case arises when we have something like this: | |
6437 | ||
0cbd7506 | 6438 | template <class T> struct S { |
c8094d83 | 6439 | friend void f<int>(int, double); |
36a117a5 MM |
6440 | }; |
6441 | ||
6442 | Here, the DECL_TI_TEMPLATE for the friend declaration | |
10b1d5e7 MM |
6443 | will be an IDENTIFIER_NODE. We are being called from |
6444 | tsubst_friend_function, and we want only to create a | |
6445 | new decl (R) with appropriate types so that we can call | |
6446 | determine_specialization. */ | |
36a117a5 MM |
6447 | gen_tmpl = NULL_TREE; |
6448 | } | |
6449 | ||
6eb3bb27 | 6450 | if (DECL_CLASS_SCOPE_P (t)) |
8d08fdba | 6451 | { |
5566b478 MS |
6452 | if (DECL_NAME (t) == constructor_name (DECL_CONTEXT (t))) |
6453 | member = 2; | |
6454 | else | |
6455 | member = 1; | |
c8094d83 | 6456 | ctx = tsubst_aggr_type (DECL_CONTEXT (t), args, |
8c6ab2db | 6457 | complain, t, /*entering_scope=*/1); |
5566b478 MS |
6458 | } |
6459 | else | |
6460 | { | |
6461 | member = 0; | |
4f1c5b7d | 6462 | ctx = DECL_CONTEXT (t); |
5566b478 | 6463 | } |
fc6a28d7 | 6464 | type = tsubst (TREE_TYPE (t), args, complain, in_decl); |
b3da7bb1 MM |
6465 | if (type == error_mark_node) |
6466 | return error_mark_node; | |
8d08fdba | 6467 | |
5566b478 | 6468 | /* We do NOT check for matching decls pushed separately at this |
0cbd7506 MS |
6469 | point, as they may not represent instantiations of this |
6470 | template, and in any case are considered separate under the | |
6471 | discrete model. */ | |
0acf7199 | 6472 | r = copy_decl (t); |
e1467ff2 | 6473 | DECL_USE_TEMPLATE (r) = 0; |
5566b478 | 6474 | TREE_TYPE (r) = type; |
92643fea MM |
6475 | /* Clear out the mangled name and RTL for the instantiation. */ |
6476 | SET_DECL_ASSEMBLER_NAME (r, NULL_TREE); | |
6477 | SET_DECL_RTL (r, NULL_RTX); | |
5bd61841 | 6478 | DECL_INITIAL (r) = NULL_TREE; |
4f1c5b7d | 6479 | DECL_CONTEXT (r) = ctx; |
5566b478 | 6480 | |
c8094d83 | 6481 | if (member && DECL_CONV_FN_P (r)) |
1f84ec23 MM |
6482 | /* Type-conversion operator. Reconstruct the name, in |
6483 | case it's the name of one of the template's parameters. */ | |
6484 | DECL_NAME (r) = mangle_conv_op_name_for_type (TREE_TYPE (type)); | |
5566b478 | 6485 | |
4393e105 | 6486 | DECL_ARGUMENTS (r) = tsubst (DECL_ARGUMENTS (t), args, |
c2ea3a40 | 6487 | complain, t); |
477f6664 | 6488 | DECL_RESULT (r) = NULL_TREE; |
711734a9 JM |
6489 | |
6490 | TREE_STATIC (r) = 0; | |
6491 | TREE_PUBLIC (r) = TREE_PUBLIC (t); | |
6492 | DECL_EXTERNAL (r) = 1; | |
4684cd27 MM |
6493 | /* If this is an instantiation of a function with internal |
6494 | linkage, we already know what object file linkage will be | |
6495 | assigned to the instantiation. */ | |
6496 | DECL_INTERFACE_KNOWN (r) = !TREE_PUBLIC (r); | |
711734a9 JM |
6497 | DECL_DEFER_OUTPUT (r) = 0; |
6498 | TREE_CHAIN (r) = NULL_TREE; | |
6499 | DECL_PENDING_INLINE_INFO (r) = 0; | |
59026e79 | 6500 | DECL_PENDING_INLINE_P (r) = 0; |
655dc6ee | 6501 | DECL_SAVED_TREE (r) = NULL_TREE; |
711734a9 | 6502 | TREE_USED (r) = 0; |
db9b2174 MM |
6503 | if (DECL_CLONED_FUNCTION (r)) |
6504 | { | |
6505 | DECL_CLONED_FUNCTION (r) = tsubst (DECL_CLONED_FUNCTION (t), | |
c2ea3a40 | 6506 | args, complain, t); |
db9b2174 MM |
6507 | TREE_CHAIN (r) = TREE_CHAIN (DECL_CLONED_FUNCTION (r)); |
6508 | TREE_CHAIN (DECL_CLONED_FUNCTION (r)) = r; | |
6509 | } | |
711734a9 | 6510 | |
92643fea MM |
6511 | /* Set up the DECL_TEMPLATE_INFO for R. There's no need to do |
6512 | this in the special friend case mentioned above where | |
6513 | GEN_TMPL is NULL. */ | |
36a117a5 | 6514 | if (gen_tmpl) |
386b8a85 | 6515 | { |
c8094d83 | 6516 | DECL_TEMPLATE_INFO (r) |
e1b3e07d | 6517 | = tree_cons (gen_tmpl, argvec, NULL_TREE); |
36a117a5 | 6518 | SET_DECL_IMPLICIT_INSTANTIATION (r); |
d63d5d0c | 6519 | register_specialization (r, gen_tmpl, argvec, false); |
36a117a5 | 6520 | |
9188c363 MM |
6521 | /* We're not supposed to instantiate default arguments |
6522 | until they are called, for a template. But, for a | |
6523 | declaration like: | |
6524 | ||
0cbd7506 MS |
6525 | template <class T> void f () |
6526 | { extern void g(int i = T()); } | |
c8094d83 | 6527 | |
9188c363 MM |
6528 | we should do the substitution when the template is |
6529 | instantiated. We handle the member function case in | |
6530 | instantiate_class_template since the default arguments | |
6531 | might refer to other members of the class. */ | |
6532 | if (!member | |
6533 | && !PRIMARY_TEMPLATE_P (gen_tmpl) | |
6534 | && !uses_template_parms (argvec)) | |
6535 | tsubst_default_arguments (r); | |
386b8a85 | 6536 | } |
c43e95f8 MM |
6537 | else |
6538 | DECL_TEMPLATE_INFO (r) = NULL_TREE; | |
f181d4ae | 6539 | |
cf38f48a MM |
6540 | /* Copy the list of befriending classes. */ |
6541 | for (friends = &DECL_BEFRIENDING_CLASSES (r); | |
6542 | *friends; | |
c8094d83 | 6543 | friends = &TREE_CHAIN (*friends)) |
cf38f48a MM |
6544 | { |
6545 | *friends = copy_node (*friends); | |
6546 | TREE_VALUE (*friends) = tsubst (TREE_VALUE (*friends), | |
c2ea3a40 | 6547 | args, complain, |
cf38f48a MM |
6548 | in_decl); |
6549 | } | |
6550 | ||
212e7048 | 6551 | if (DECL_CONSTRUCTOR_P (r) || DECL_DESTRUCTOR_P (r)) |
f181d4ae MM |
6552 | { |
6553 | maybe_retrofit_in_chrg (r); | |
212e7048 MM |
6554 | if (DECL_CONSTRUCTOR_P (r)) |
6555 | grok_ctor_properties (ctx, r); | |
2be678ff JM |
6556 | /* If this is an instantiation of a member template, clone it. |
6557 | If it isn't, that'll be handled by | |
6558 | clone_constructors_and_destructors. */ | |
5e818b93 | 6559 | if (PRIMARY_TEMPLATE_P (gen_tmpl)) |
271e6f02 | 6560 | clone_function_decl (r, /*update_method_vec_p=*/0); |
f181d4ae | 6561 | } |
596ea4e5 | 6562 | else if (IDENTIFIER_OPNAME_P (DECL_NAME (r))) |
7e45bd18 | 6563 | grok_op_properties (r, (complain & tf_error) != 0); |
c8b2e872 MM |
6564 | |
6565 | if (DECL_FRIEND_P (t) && DECL_FRIEND_CONTEXT (t)) | |
6566 | SET_DECL_FRIEND_CONTEXT (r, | |
6567 | tsubst (DECL_FRIEND_CONTEXT (t), | |
6568 | args, complain, in_decl)); | |
8d08fdba | 6569 | } |
ae58fa02 | 6570 | break; |
8d08fdba MS |
6571 | |
6572 | case PARM_DECL: | |
6573 | { | |
fc6a28d7 MM |
6574 | tree type; |
6575 | ||
ae58fa02 | 6576 | r = copy_node (t); |
833aa4c4 NS |
6577 | if (DECL_TEMPLATE_PARM_P (t)) |
6578 | SET_DECL_TEMPLATE_PARM_P (r); | |
8e51619a | 6579 | |
fc6a28d7 | 6580 | type = tsubst (TREE_TYPE (t), args, complain, in_decl); |
02bab9db | 6581 | type = type_decays_to (type); |
5566b478 | 6582 | TREE_TYPE (r) = type; |
9804209d | 6583 | cp_apply_type_quals_to_decl (cp_type_quals (type), r); |
1b8899d1 | 6584 | |
560ad596 MM |
6585 | if (DECL_INITIAL (r)) |
6586 | { | |
6587 | if (TREE_CODE (DECL_INITIAL (r)) != TEMPLATE_PARM_INDEX) | |
6588 | DECL_INITIAL (r) = TREE_TYPE (r); | |
6589 | else | |
6590 | DECL_INITIAL (r) = tsubst (DECL_INITIAL (r), args, | |
6591 | complain, in_decl); | |
6592 | } | |
db2767b6 | 6593 | |
5566b478 | 6594 | DECL_CONTEXT (r) = NULL_TREE; |
8e51619a JM |
6595 | |
6596 | if (!DECL_TEMPLATE_PARM_P (r)) | |
6597 | DECL_ARG_TYPE (r) = type_passed_as (type); | |
8d08fdba | 6598 | if (TREE_CHAIN (t)) |
4393e105 | 6599 | TREE_CHAIN (r) = tsubst (TREE_CHAIN (t), args, |
c2ea3a40 | 6600 | complain, TREE_CHAIN (t)); |
8d08fdba | 6601 | } |
ae58fa02 | 6602 | break; |
8d08fdba | 6603 | |
5566b478 MS |
6604 | case FIELD_DECL: |
6605 | { | |
fc6a28d7 MM |
6606 | tree type; |
6607 | ||
0acf7199 | 6608 | r = copy_decl (t); |
fc6a28d7 MM |
6609 | type = tsubst (TREE_TYPE (t), args, complain, in_decl); |
6610 | if (type == error_mark_node) | |
6611 | return error_mark_node; | |
1b8899d1 | 6612 | TREE_TYPE (r) = type; |
9804209d | 6613 | cp_apply_type_quals_to_decl (cp_type_quals (type), r); |
1b8899d1 MM |
6614 | |
6615 | /* We don't have to set DECL_CONTEXT here; it is set by | |
6616 | finish_member_declaration. */ | |
4393e105 | 6617 | DECL_INITIAL (r) = tsubst_expr (DECL_INITIAL (t), args, |
c2ea3a40 | 6618 | complain, in_decl); |
5566b478 | 6619 | TREE_CHAIN (r) = NULL_TREE; |
c8094d83 | 6620 | if (VOID_TYPE_P (type)) |
dee15844 | 6621 | error ("instantiation of %q+D as type %qT", r, type); |
5566b478 | 6622 | } |
ae58fa02 | 6623 | break; |
5566b478 MS |
6624 | |
6625 | case USING_DECL: | |
98ed9dae NS |
6626 | /* We reach here only for member using decls. */ |
6627 | if (DECL_DEPENDENT_P (t)) | |
6628 | { | |
6629 | r = do_class_using_decl | |
6630 | (tsubst_copy (USING_DECL_SCOPE (t), args, complain, in_decl), | |
6631 | tsubst_copy (DECL_NAME (t), args, complain, in_decl)); | |
6632 | if (!r) | |
6633 | r = error_mark_node; | |
6634 | } | |
6635 | else | |
6636 | { | |
6637 | r = copy_node (t); | |
6638 | TREE_CHAIN (r) = NULL_TREE; | |
6639 | } | |
ae58fa02 | 6640 | break; |
5566b478 | 6641 | |
9188c363 | 6642 | case TYPE_DECL: |
5566b478 MS |
6643 | case VAR_DECL: |
6644 | { | |
1cea0434 KG |
6645 | tree argvec = NULL_TREE; |
6646 | tree gen_tmpl = NULL_TREE; | |
36a117a5 | 6647 | tree spec; |
1cea0434 | 6648 | tree tmpl = NULL_TREE; |
9188c363 | 6649 | tree ctx; |
fc6a28d7 | 6650 | tree type = NULL_TREE; |
6dfbb909 | 6651 | int local_p; |
9188c363 | 6652 | |
fc6a28d7 MM |
6653 | if (TREE_CODE (t) == TYPE_DECL) |
6654 | { | |
6655 | type = tsubst (TREE_TYPE (t), args, complain, in_decl); | |
6656 | if (TREE_CODE (type) == TEMPLATE_TEMPLATE_PARM | |
6657 | || t == TYPE_MAIN_DECL (TREE_TYPE (t))) | |
6658 | { | |
6659 | /* If this is the canonical decl, we don't have to | |
6660 | mess with instantiations, and often we can't (for | |
6661 | typename, template type parms and such). Note that | |
6662 | TYPE_NAME is not correct for the above test if | |
6663 | we've copied the type for a typedef. */ | |
6664 | r = TYPE_NAME (type); | |
6665 | break; | |
6666 | } | |
6667 | } | |
c8094d83 | 6668 | |
6dfbb909 MM |
6669 | /* Assume this is a non-local variable. */ |
6670 | local_p = 0; | |
5566b478 | 6671 | |
de96bf57 | 6672 | if (TYPE_P (CP_DECL_CONTEXT (t))) |
c8094d83 | 6673 | ctx = tsubst_aggr_type (DECL_CONTEXT (t), args, |
c2ea3a40 | 6674 | complain, |
9188c363 | 6675 | in_decl, /*entering_scope=*/1); |
2ba9c47e MM |
6676 | else if (DECL_NAMESPACE_SCOPE_P (t)) |
6677 | ctx = DECL_CONTEXT (t); | |
9188c363 | 6678 | else |
6dfbb909 MM |
6679 | { |
6680 | /* Subsequent calls to pushdecl will fill this in. */ | |
6681 | ctx = NULL_TREE; | |
2ba9c47e | 6682 | local_p = 1; |
6dfbb909 | 6683 | } |
9188c363 | 6684 | |
36a117a5 | 6685 | /* Check to see if we already have this specialization. */ |
6dfbb909 MM |
6686 | if (!local_p) |
6687 | { | |
6688 | tmpl = DECL_TI_TEMPLATE (t); | |
6689 | gen_tmpl = most_general_template (tmpl); | |
c2ea3a40 | 6690 | argvec = tsubst (DECL_TI_ARGS (t), args, complain, in_decl); |
c7222c02 MM |
6691 | spec = retrieve_specialization (gen_tmpl, argvec, |
6692 | /*class_specializations_p=*/false); | |
6dfbb909 | 6693 | } |
9188c363 | 6694 | else |
6dfbb909 | 6695 | spec = retrieve_local_specialization (t); |
9188c363 | 6696 | |
36a117a5 | 6697 | if (spec) |
ae58fa02 MM |
6698 | { |
6699 | r = spec; | |
6700 | break; | |
6701 | } | |
5566b478 | 6702 | |
0acf7199 | 6703 | r = copy_decl (t); |
edebf865 | 6704 | if (TREE_CODE (r) == VAR_DECL) |
39703eb9 | 6705 | { |
8b0a8500 MM |
6706 | /* Even if the original location is out of scope, the |
6707 | newly substituted one is not. */ | |
6708 | DECL_DEAD_FOR_LOCAL (r) = 0; | |
6709 | DECL_INITIALIZED_P (r) = 0; | |
6710 | DECL_TEMPLATE_INSTANTIATED (r) = 0; | |
fc6a28d7 MM |
6711 | type = tsubst (TREE_TYPE (t), args, complain, in_decl); |
6712 | if (type == error_mark_node) | |
6713 | return error_mark_node; | |
39703eb9 MM |
6714 | type = complete_type (type); |
6715 | DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (r) | |
6716 | = DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (t); | |
62e19030 | 6717 | type = check_var_type (DECL_NAME (r), type); |
56b4ea3d RH |
6718 | |
6719 | if (DECL_HAS_VALUE_EXPR_P (t)) | |
6720 | { | |
6721 | tree ve = DECL_VALUE_EXPR (t); | |
6722 | ve = tsubst_expr (ve, args, complain, in_decl); | |
6723 | SET_DECL_VALUE_EXPR (r, ve); | |
6724 | } | |
39703eb9 | 6725 | } |
a3d87771 MM |
6726 | else if (DECL_SELF_REFERENCE_P (t)) |
6727 | SET_DECL_SELF_REFERENCE_P (r); | |
01f4137f | 6728 | TREE_TYPE (r) = type; |
9804209d | 6729 | cp_apply_type_quals_to_decl (cp_type_quals (type), r); |
5566b478 | 6730 | DECL_CONTEXT (r) = ctx; |
92643fea MM |
6731 | /* Clear out the mangled name and RTL for the instantiation. */ |
6732 | SET_DECL_ASSEMBLER_NAME (r, NULL_TREE); | |
820cc88f DB |
6733 | if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_DECL_WRTL)) |
6734 | SET_DECL_RTL (r, NULL_RTX); | |
8b0a8500 MM |
6735 | /* The initializer must not be expanded until it is required; |
6736 | see [temp.inst]. */ | |
d11ad92e | 6737 | DECL_INITIAL (r) = NULL_TREE; |
820cc88f DB |
6738 | if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_DECL_WRTL)) |
6739 | SET_DECL_RTL (r, NULL_RTX); | |
06ceef4e | 6740 | DECL_SIZE (r) = DECL_SIZE_UNIT (r) = 0; |
5566b478 | 6741 | |
6dfbb909 MM |
6742 | if (!local_p) |
6743 | { | |
6744 | /* A static data member declaration is always marked | |
6745 | external when it is declared in-class, even if an | |
6746 | initializer is present. We mimic the non-template | |
6747 | processing here. */ | |
6748 | DECL_EXTERNAL (r) = 1; | |
fa8d6e85 | 6749 | |
d63d5d0c | 6750 | register_specialization (r, gen_tmpl, argvec, false); |
6dfbb909 MM |
6751 | DECL_TEMPLATE_INFO (r) = tree_cons (tmpl, argvec, NULL_TREE); |
6752 | SET_DECL_IMPLICIT_INSTANTIATION (r); | |
6753 | } | |
9188c363 | 6754 | else |
6dfbb909 | 6755 | register_local_specialization (r, t); |
5566b478 | 6756 | |
5566b478 | 6757 | TREE_CHAIN (r) = NULL_TREE; |
edebf865 | 6758 | layout_decl (r, 0); |
5566b478 | 6759 | } |
ae58fa02 | 6760 | break; |
5566b478 | 6761 | |
ae58fa02 | 6762 | default: |
315fb5db | 6763 | gcc_unreachable (); |
c8094d83 | 6764 | } |
ae58fa02 MM |
6765 | |
6766 | /* Restore the file and line information. */ | |
82a98427 | 6767 | input_location = saved_loc; |
ae58fa02 MM |
6768 | |
6769 | return r; | |
6770 | } | |
6771 | ||
34cd5ae7 | 6772 | /* Substitute into the ARG_TYPES of a function type. */ |
cabc336a | 6773 | |
e9659ab0 | 6774 | static tree |
c8094d83 | 6775 | tsubst_arg_types (tree arg_types, |
0cbd7506 MS |
6776 | tree args, |
6777 | tsubst_flags_t complain, | |
6778 | tree in_decl) | |
cabc336a MM |
6779 | { |
6780 | tree remaining_arg_types; | |
cabc336a | 6781 | tree type; |
5e97d404 NS |
6782 | tree default_arg; |
6783 | tree result = NULL_TREE; | |
cabc336a MM |
6784 | |
6785 | if (!arg_types || arg_types == void_list_node) | |
6786 | return arg_types; | |
c8094d83 | 6787 | |
cabc336a | 6788 | remaining_arg_types = tsubst_arg_types (TREE_CHAIN (arg_types), |
4393e105 MM |
6789 | args, complain, in_decl); |
6790 | if (remaining_arg_types == error_mark_node) | |
6791 | return error_mark_node; | |
6792 | ||
6793 | type = tsubst (TREE_VALUE (arg_types), args, complain, in_decl); | |
6794 | if (type == error_mark_node) | |
6795 | return error_mark_node; | |
4b2811e9 NS |
6796 | if (VOID_TYPE_P (type)) |
6797 | { | |
c2ea3a40 | 6798 | if (complain & tf_error) |
0cbd7506 MS |
6799 | { |
6800 | error ("invalid parameter type %qT", type); | |
6801 | if (in_decl) | |
dee15844 | 6802 | error ("in declaration %q+D", in_decl); |
0cbd7506 | 6803 | } |
4b2811e9 NS |
6804 | return error_mark_node; |
6805 | } | |
cabc336a | 6806 | |
4393e105 MM |
6807 | /* Do array-to-pointer, function-to-pointer conversion, and ignore |
6808 | top-level qualifiers as required. */ | |
6809 | type = TYPE_MAIN_VARIANT (type_decays_to (type)); | |
cabc336a | 6810 | |
5e97d404 NS |
6811 | /* We do not substitute into default arguments here. The standard |
6812 | mandates that they be instantiated only when needed, which is | |
6813 | done in build_over_call. */ | |
6814 | default_arg = TREE_PURPOSE (arg_types); | |
c8094d83 | 6815 | |
5e97d404 NS |
6816 | if (default_arg && TREE_CODE (default_arg) == DEFAULT_ARG) |
6817 | { | |
6818 | /* We've instantiated a template before its default arguments | |
0cbd7506 MS |
6819 | have been parsed. This can happen for a nested template |
6820 | class, and is not an error unless we require the default | |
6821 | argument in a call of this function. */ | |
5e97d404 | 6822 | result = tree_cons (default_arg, type, remaining_arg_types); |
01ea1ea8 | 6823 | VEC_safe_push (tree, gc, DEFARG_INSTANTIATIONS (default_arg), result); |
5e97d404 NS |
6824 | } |
6825 | else | |
6826 | result = hash_tree_cons (default_arg, type, remaining_arg_types); | |
c8094d83 | 6827 | |
5e97d404 | 6828 | return result; |
cabc336a MM |
6829 | } |
6830 | ||
4393e105 MM |
6831 | /* Substitute into a FUNCTION_TYPE or METHOD_TYPE. This routine does |
6832 | *not* handle the exception-specification for FNTYPE, because the | |
6833 | initial substitution of explicitly provided template parameters | |
6834 | during argument deduction forbids substitution into the | |
6835 | exception-specification: | |
6836 | ||
6837 | [temp.deduct] | |
6838 | ||
6839 | All references in the function type of the function template to the | |
6840 | corresponding template parameters are replaced by the specified tem- | |
6841 | plate argument values. If a substitution in a template parameter or | |
6842 | in the function type of the function template results in an invalid | |
6843 | type, type deduction fails. [Note: The equivalent substitution in | |
6844 | exception specifications is done only when the function is instanti- | |
6845 | ated, at which point a program is ill-formed if the substitution | |
6846 | results in an invalid type.] */ | |
6847 | ||
6848 | static tree | |
c8094d83 | 6849 | tsubst_function_type (tree t, |
0cbd7506 MS |
6850 | tree args, |
6851 | tsubst_flags_t complain, | |
6852 | tree in_decl) | |
4393e105 MM |
6853 | { |
6854 | tree return_type; | |
6855 | tree arg_types; | |
6856 | tree fntype; | |
6857 | ||
8dd3f57a | 6858 | /* The TYPE_CONTEXT is not used for function/method types. */ |
50bc768d | 6859 | gcc_assert (TYPE_CONTEXT (t) == NULL_TREE); |
4393e105 | 6860 | |
46c895ac | 6861 | /* Substitute the return type. */ |
4393e105 MM |
6862 | return_type = tsubst (TREE_TYPE (t), args, complain, in_decl); |
6863 | if (return_type == error_mark_node) | |
6864 | return error_mark_node; | |
6e2993bf MM |
6865 | /* The standard does not presently indicate that creation of a |
6866 | function type with an invalid return type is a deduction failure. | |
270af55d | 6867 | However, that is clearly analogous to creating an array of "void" |
c8094d83 | 6868 | or a reference to a reference. This is core issue #486. */ |
6e2993bf MM |
6869 | if (TREE_CODE (return_type) == ARRAY_TYPE |
6870 | || TREE_CODE (return_type) == FUNCTION_TYPE) | |
6871 | { | |
6872 | if (complain & tf_error) | |
6873 | { | |
6874 | if (TREE_CODE (return_type) == ARRAY_TYPE) | |
6875 | error ("function returning an array"); | |
6876 | else | |
6877 | error ("function returning a function"); | |
6878 | } | |
6879 | return error_mark_node; | |
6880 | } | |
4393e105 | 6881 | |
34cd5ae7 | 6882 | /* Substitute the argument types. */ |
4393e105 | 6883 | arg_types = tsubst_arg_types (TYPE_ARG_TYPES (t), args, |
c8094d83 | 6884 | complain, in_decl); |
4393e105 MM |
6885 | if (arg_types == error_mark_node) |
6886 | return error_mark_node; | |
c8094d83 | 6887 | |
4393e105 MM |
6888 | /* Construct a new type node and return it. */ |
6889 | if (TREE_CODE (t) == FUNCTION_TYPE) | |
6890 | fntype = build_function_type (return_type, arg_types); | |
6891 | else | |
6892 | { | |
6893 | tree r = TREE_TYPE (TREE_VALUE (arg_types)); | |
6894 | if (! IS_AGGR_TYPE (r)) | |
6895 | { | |
6896 | /* [temp.deduct] | |
c8094d83 | 6897 | |
4393e105 MM |
6898 | Type deduction may fail for any of the following |
6899 | reasons: | |
c8094d83 | 6900 | |
4393e105 MM |
6901 | -- Attempting to create "pointer to member of T" when T |
6902 | is not a class type. */ | |
c2ea3a40 | 6903 | if (complain & tf_error) |
0f51ccfc | 6904 | error ("creating pointer to member function of non-class type %qT", |
4393e105 MM |
6905 | r); |
6906 | return error_mark_node; | |
6907 | } | |
c8094d83 MS |
6908 | |
6909 | fntype = build_method_type_directly (r, return_type, | |
43dc123f | 6910 | TREE_CHAIN (arg_types)); |
4393e105 | 6911 | } |
c2ea3a40 | 6912 | fntype = cp_build_qualified_type_real (fntype, TYPE_QUALS (t), complain); |
e9525111 | 6913 | fntype = cp_build_type_attribute_variant (fntype, TYPE_ATTRIBUTES (t)); |
c8094d83 MS |
6914 | |
6915 | return fntype; | |
4393e105 MM |
6916 | } |
6917 | ||
c7222c02 MM |
6918 | /* FNTYPE is a FUNCTION_TYPE or METHOD_TYPE. Substitute the template |
6919 | ARGS into that specification, and return the substituted | |
6920 | specification. If there is no specification, return NULL_TREE. */ | |
6921 | ||
6922 | static tree | |
c8094d83 MS |
6923 | tsubst_exception_specification (tree fntype, |
6924 | tree args, | |
c7222c02 MM |
6925 | tsubst_flags_t complain, |
6926 | tree in_decl) | |
6927 | { | |
6928 | tree specs; | |
6929 | tree new_specs; | |
6930 | ||
6931 | specs = TYPE_RAISES_EXCEPTIONS (fntype); | |
6932 | new_specs = NULL_TREE; | |
6933 | if (specs) | |
6934 | { | |
6935 | if (! TREE_VALUE (specs)) | |
6936 | new_specs = specs; | |
6937 | else | |
6938 | while (specs) | |
6939 | { | |
6940 | tree spec; | |
6941 | spec = tsubst (TREE_VALUE (specs), args, complain, in_decl); | |
6942 | if (spec == error_mark_node) | |
6943 | return spec; | |
6944 | new_specs = add_exception_specifier (new_specs, spec, complain); | |
6945 | specs = TREE_CHAIN (specs); | |
6946 | } | |
6947 | } | |
6948 | return new_specs; | |
6949 | } | |
6950 | ||
297e73d8 MM |
6951 | /* Substitute into the PARMS of a call-declarator. */ |
6952 | ||
e9659ab0 | 6953 | static tree |
c8094d83 | 6954 | tsubst_call_declarator_parms (tree parms, |
0cbd7506 MS |
6955 | tree args, |
6956 | tsubst_flags_t complain, | |
6957 | tree in_decl) | |
297e73d8 MM |
6958 | { |
6959 | tree new_parms; | |
6960 | tree type; | |
6961 | tree defarg; | |
6962 | ||
6963 | if (!parms || parms == void_list_node) | |
6964 | return parms; | |
c8094d83 | 6965 | |
297e73d8 | 6966 | new_parms = tsubst_call_declarator_parms (TREE_CHAIN (parms), |
4393e105 | 6967 | args, complain, in_decl); |
297e73d8 MM |
6968 | |
6969 | /* Figure out the type of this parameter. */ | |
4393e105 | 6970 | type = tsubst (TREE_VALUE (parms), args, complain, in_decl); |
c8094d83 | 6971 | |
297e73d8 | 6972 | /* Figure out the default argument as well. Note that we use |
4393e105 MM |
6973 | tsubst_expr since the default argument is really an expression. */ |
6974 | defarg = tsubst_expr (TREE_PURPOSE (parms), args, complain, in_decl); | |
297e73d8 MM |
6975 | |
6976 | /* Chain this parameter on to the front of those we have already | |
6977 | processed. We don't use hash_tree_cons because that function | |
6978 | doesn't check TREE_PARMLIST. */ | |
6979 | new_parms = tree_cons (defarg, type, new_parms); | |
6980 | ||
297e73d8 MM |
6981 | return new_parms; |
6982 | } | |
6983 | ||
4393e105 MM |
6984 | /* Take the tree structure T and replace template parameters used |
6985 | therein with the argument vector ARGS. IN_DECL is an associated | |
6986 | decl for diagnostics. If an error occurs, returns ERROR_MARK_NODE. | |
c2ea3a40 NS |
6987 | Issue error and warning messages under control of COMPLAIN. Note |
6988 | that we must be relatively non-tolerant of extensions here, in | |
6989 | order to preserve conformance; if we allow substitutions that | |
6990 | should not be allowed, we may allow argument deductions that should | |
6991 | not succeed, and therefore report ambiguous overload situations | |
6992 | where there are none. In theory, we could allow the substitution, | |
6993 | but indicate that it should have failed, and allow our caller to | |
6994 | make sure that the right thing happens, but we don't try to do this | |
6995 | yet. | |
4393e105 MM |
6996 | |
6997 | This function is used for dealing with types, decls and the like; | |
6998 | for expressions, use tsubst_expr or tsubst_copy. */ | |
ae58fa02 | 6999 | |
14d22dd6 | 7000 | static tree |
3a978d72 | 7001 | tsubst (tree t, tree args, tsubst_flags_t complain, tree in_decl) |
ae58fa02 | 7002 | { |
0ecfe0b4 | 7003 | tree type, r; |
ae58fa02 MM |
7004 | |
7005 | if (t == NULL_TREE || t == error_mark_node | |
7006 | || t == integer_type_node | |
7007 | || t == void_type_node | |
7008 | || t == char_type_node | |
539599c1 | 7009 | || t == unknown_type_node |
ae58fa02 MM |
7010 | || TREE_CODE (t) == NAMESPACE_DECL) |
7011 | return t; | |
7012 | ||
fc6a28d7 MM |
7013 | if (DECL_P (t)) |
7014 | return tsubst_decl (t, args, complain); | |
7015 | ||
ae58fa02 MM |
7016 | if (TREE_CODE (t) == IDENTIFIER_NODE) |
7017 | type = IDENTIFIER_TYPE_VALUE (t); | |
7018 | else | |
7019 | type = TREE_TYPE (t); | |
399dedb9 | 7020 | |
50bc768d | 7021 | gcc_assert (type != unknown_type_node); |
ae58fa02 | 7022 | |
fc6a28d7 | 7023 | if (type |
ae58fa02 | 7024 | && TREE_CODE (t) != TYPENAME_TYPE |
4393e105 MM |
7025 | && TREE_CODE (t) != IDENTIFIER_NODE |
7026 | && TREE_CODE (t) != FUNCTION_TYPE | |
7027 | && TREE_CODE (t) != METHOD_TYPE) | |
7028 | type = tsubst (type, args, complain, in_decl); | |
7029 | if (type == error_mark_node) | |
7030 | return error_mark_node; | |
ae58fa02 | 7031 | |
ae58fa02 MM |
7032 | switch (TREE_CODE (t)) |
7033 | { | |
7034 | case RECORD_TYPE: | |
7035 | case UNION_TYPE: | |
7036 | case ENUMERAL_TYPE: | |
4393e105 MM |
7037 | return tsubst_aggr_type (t, args, complain, in_decl, |
7038 | /*entering_scope=*/0); | |
ae58fa02 MM |
7039 | |
7040 | case ERROR_MARK: | |
7041 | case IDENTIFIER_NODE: | |
ae58fa02 MM |
7042 | case VOID_TYPE: |
7043 | case REAL_TYPE: | |
7044 | case COMPLEX_TYPE: | |
c00996a3 | 7045 | case VECTOR_TYPE: |
ae58fa02 MM |
7046 | case BOOLEAN_TYPE: |
7047 | case INTEGER_CST: | |
7048 | case REAL_CST: | |
7049 | case STRING_CST: | |
7050 | return t; | |
7051 | ||
7052 | case INTEGER_TYPE: | |
7053 | if (t == integer_type_node) | |
7054 | return t; | |
7055 | ||
7056 | if (TREE_CODE (TYPE_MIN_VALUE (t)) == INTEGER_CST | |
7057 | && TREE_CODE (TYPE_MAX_VALUE (t)) == INTEGER_CST) | |
7058 | return t; | |
d2e5ee5c | 7059 | |
5566b478 | 7060 | { |
ddce3528 | 7061 | tree max, omax = TREE_OPERAND (TYPE_MAX_VALUE (t), 0); |
7ddedda4 | 7062 | |
a91db711 NS |
7063 | /* The array dimension behaves like a non-type template arg, |
7064 | in that we want to fold it as much as possible. */ | |
7065 | max = tsubst_template_arg (omax, args, complain, in_decl); | |
4ef69b83 | 7066 | max = fold_decl_constant_value (max); |
8dd3f57a | 7067 | |
ddce3528 JM |
7068 | if (integer_zerop (omax)) |
7069 | { | |
7070 | /* Still allow an explicit array of size zero. */ | |
7071 | if (pedantic) | |
7072 | pedwarn ("creating array with size zero"); | |
7073 | } | |
c8094d83 MS |
7074 | else if (integer_zerop (max) |
7075 | || (TREE_CODE (max) == INTEGER_CST | |
07c88314 | 7076 | && INT_CST_LT (max, integer_zero_node))) |
0ecfe0b4 | 7077 | { |
4393e105 MM |
7078 | /* [temp.deduct] |
7079 | ||
7080 | Type deduction may fail for any of the following | |
c8094d83 | 7081 | reasons: |
4393e105 | 7082 | |
bf8f3f93 MM |
7083 | Attempting to create an array with a size that is |
7084 | zero or negative. */ | |
c2ea3a40 | 7085 | if (complain & tf_error) |
0f51ccfc | 7086 | error ("creating array with size zero (%qE)", max); |
4393e105 MM |
7087 | |
7088 | return error_mark_node; | |
0ecfe0b4 JM |
7089 | } |
7090 | ||
c95cd22e | 7091 | return compute_array_index_type (NULL_TREE, max); |
ae58fa02 MM |
7092 | } |
7093 | ||
7094 | case TEMPLATE_TYPE_PARM: | |
7095 | case TEMPLATE_TEMPLATE_PARM: | |
a1281f45 | 7096 | case BOUND_TEMPLATE_TEMPLATE_PARM: |
ae58fa02 MM |
7097 | case TEMPLATE_PARM_INDEX: |
7098 | { | |
7099 | int idx; | |
7100 | int level; | |
7101 | int levels; | |
315fb5db | 7102 | tree arg = NULL_TREE; |
0ecfe0b4 JM |
7103 | |
7104 | r = NULL_TREE; | |
ae58fa02 | 7105 | |
315fb5db | 7106 | gcc_assert (TREE_VEC_LENGTH (args) > 0); |
ae58fa02 | 7107 | if (TREE_CODE (t) == TEMPLATE_TYPE_PARM |
a1281f45 KL |
7108 | || TREE_CODE (t) == TEMPLATE_TEMPLATE_PARM |
7109 | || TREE_CODE (t) == BOUND_TEMPLATE_TEMPLATE_PARM) | |
ae58fa02 MM |
7110 | { |
7111 | idx = TEMPLATE_TYPE_IDX (t); | |
7112 | level = TEMPLATE_TYPE_LEVEL (t); | |
7113 | } | |
7114 | else | |
7115 | { | |
7116 | idx = TEMPLATE_PARM_IDX (t); | |
7117 | level = TEMPLATE_PARM_LEVEL (t); | |
7118 | } | |
7119 | ||
315fb5db NS |
7120 | levels = TMPL_ARGS_DEPTH (args); |
7121 | if (level <= levels) | |
7122 | arg = TMPL_ARG (args, level, idx); | |
ae58fa02 | 7123 | |
315fb5db NS |
7124 | if (arg == error_mark_node) |
7125 | return error_mark_node; | |
7126 | else if (arg != NULL_TREE) | |
7127 | { | |
7128 | if (TREE_CODE (t) == TEMPLATE_TYPE_PARM) | |
ae58fa02 | 7129 | { |
315fb5db NS |
7130 | gcc_assert (TYPE_P (arg)); |
7131 | return cp_build_qualified_type_real | |
7132 | (arg, cp_type_quals (arg) | cp_type_quals (t), | |
7133 | complain | tf_ignore_bad_quals); | |
7134 | } | |
7135 | else if (TREE_CODE (t) == BOUND_TEMPLATE_TEMPLATE_PARM) | |
7136 | { | |
7137 | /* We are processing a type constructed from a | |
7138 | template template parameter. */ | |
7139 | tree argvec = tsubst (TYPE_TI_ARGS (t), | |
7140 | args, complain, in_decl); | |
7141 | if (argvec == error_mark_node) | |
7142 | return error_mark_node; | |
c8094d83 | 7143 | |
315fb5db NS |
7144 | /* We can get a TEMPLATE_TEMPLATE_PARM here when we |
7145 | are resolving nested-types in the signature of a | |
7146 | member function templates. Otherwise ARG is a | |
7147 | TEMPLATE_DECL and is the real template to be | |
7148 | instantiated. */ | |
7149 | if (TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM) | |
7150 | arg = TYPE_NAME (arg); | |
c8094d83 MS |
7151 | |
7152 | r = lookup_template_class (arg, | |
7153 | argvec, in_decl, | |
315fb5db NS |
7154 | DECL_CONTEXT (arg), |
7155 | /*entering_scope=*/0, | |
7156 | complain); | |
7157 | return cp_build_qualified_type_real | |
7158 | (r, TYPE_QUALS (t), complain); | |
ae58fa02 | 7159 | } |
315fb5db NS |
7160 | else |
7161 | /* TEMPLATE_TEMPLATE_PARM or TEMPLATE_PARM_INDEX. */ | |
7162 | return arg; | |
ae58fa02 MM |
7163 | } |
7164 | ||
7165 | if (level == 1) | |
7166 | /* This can happen during the attempted tsubst'ing in | |
7167 | unify. This means that we don't yet have any information | |
7168 | about the template parameter in question. */ | |
7169 | return t; | |
7170 | ||
7171 | /* If we get here, we must have been looking at a parm for a | |
7172 | more deeply nested template. Make a new version of this | |
7173 | template parameter, but with a lower level. */ | |
7174 | switch (TREE_CODE (t)) | |
7175 | { | |
7176 | case TEMPLATE_TYPE_PARM: | |
7177 | case TEMPLATE_TEMPLATE_PARM: | |
a1281f45 | 7178 | case BOUND_TEMPLATE_TEMPLATE_PARM: |
89d684bb | 7179 | if (cp_type_quals (t)) |
ae58fa02 | 7180 | { |
9ccf6541 | 7181 | r = tsubst (TYPE_MAIN_VARIANT (t), args, complain, in_decl); |
0cbd7506 MS |
7182 | r = cp_build_qualified_type_real |
7183 | (r, cp_type_quals (t), | |
4f2b0fb2 NS |
7184 | complain | (TREE_CODE (t) == TEMPLATE_TYPE_PARM |
7185 | ? tf_ignore_bad_quals : 0)); | |
9ccf6541 MM |
7186 | } |
7187 | else | |
7188 | { | |
11e74ea6 | 7189 | r = copy_type (t); |
9ccf6541 MM |
7190 | TEMPLATE_TYPE_PARM_INDEX (r) |
7191 | = reduce_template_parm_level (TEMPLATE_TYPE_PARM_INDEX (t), | |
7192 | r, levels); | |
7193 | TYPE_STUB_DECL (r) = TYPE_NAME (r) = TEMPLATE_TYPE_DECL (r); | |
7194 | TYPE_MAIN_VARIANT (r) = r; | |
7195 | TYPE_POINTER_TO (r) = NULL_TREE; | |
7196 | TYPE_REFERENCE_TO (r) = NULL_TREE; | |
7197 | ||
a1281f45 | 7198 | if (TREE_CODE (t) == BOUND_TEMPLATE_TEMPLATE_PARM) |
9ccf6541 MM |
7199 | { |
7200 | tree argvec = tsubst (TYPE_TI_ARGS (t), args, | |
c8094d83 | 7201 | complain, in_decl); |
9ccf6541 MM |
7202 | if (argvec == error_mark_node) |
7203 | return error_mark_node; | |
4393e105 | 7204 | |
9ccf6541 MM |
7205 | TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (r) |
7206 | = tree_cons (TYPE_TI_TEMPLATE (t), argvec, NULL_TREE); | |
7207 | } | |
ae58fa02 MM |
7208 | } |
7209 | break; | |
7210 | ||
7211 | case TEMPLATE_PARM_INDEX: | |
7212 | r = reduce_template_parm_level (t, type, levels); | |
7213 | break; | |
c8094d83 | 7214 | |
ae58fa02 | 7215 | default: |
315fb5db | 7216 | gcc_unreachable (); |
ae58fa02 MM |
7217 | } |
7218 | ||
5566b478 | 7219 | return r; |
ae58fa02 | 7220 | } |
5566b478 | 7221 | |
8d08fdba MS |
7222 | case TREE_LIST: |
7223 | { | |
058b15c1 | 7224 | tree purpose, value, chain; |
8d08fdba MS |
7225 | |
7226 | if (t == void_list_node) | |
7227 | return t; | |
7228 | ||
8d08fdba MS |
7229 | purpose = TREE_PURPOSE (t); |
7230 | if (purpose) | |
4393e105 MM |
7231 | { |
7232 | purpose = tsubst (purpose, args, complain, in_decl); | |
7233 | if (purpose == error_mark_node) | |
7234 | return error_mark_node; | |
7235 | } | |
8d08fdba MS |
7236 | value = TREE_VALUE (t); |
7237 | if (value) | |
4393e105 MM |
7238 | { |
7239 | value = tsubst (value, args, complain, in_decl); | |
7240 | if (value == error_mark_node) | |
7241 | return error_mark_node; | |
7242 | } | |
8d08fdba MS |
7243 | chain = TREE_CHAIN (t); |
7244 | if (chain && chain != void_type_node) | |
4393e105 MM |
7245 | { |
7246 | chain = tsubst (chain, args, complain, in_decl); | |
7247 | if (chain == error_mark_node) | |
7248 | return error_mark_node; | |
7249 | } | |
8d08fdba MS |
7250 | if (purpose == TREE_PURPOSE (t) |
7251 | && value == TREE_VALUE (t) | |
7252 | && chain == TREE_CHAIN (t)) | |
7253 | return t; | |
058b15c1 | 7254 | return hash_tree_cons (purpose, value, chain); |
8d08fdba | 7255 | } |
c8094d83 | 7256 | |
95b4aca6 | 7257 | case TREE_BINFO: |
bd7eccc4 | 7258 | /* We should never be tsubsting a binfo. */ |
315fb5db | 7259 | gcc_unreachable (); |
85b71cf2 | 7260 | |
95b4aca6 NS |
7261 | case TREE_VEC: |
7262 | /* A vector of template arguments. */ | |
50bc768d | 7263 | gcc_assert (!type); |
a91db711 | 7264 | return tsubst_template_args (t, args, complain, in_decl); |
8d08fdba | 7265 | |
8d08fdba MS |
7266 | case POINTER_TYPE: |
7267 | case REFERENCE_TYPE: | |
7268 | { | |
8d08fdba | 7269 | enum tree_code code; |
79a7c7fa | 7270 | |
46c895ac | 7271 | if (type == TREE_TYPE (t) && TREE_CODE (type) != METHOD_TYPE) |
8d08fdba MS |
7272 | return t; |
7273 | ||
7274 | code = TREE_CODE (t); | |
4393e105 MM |
7275 | |
7276 | ||
7277 | /* [temp.deduct] | |
c8094d83 | 7278 | |
4393e105 | 7279 | Type deduction may fail for any of the following |
c8094d83 | 7280 | reasons: |
4393e105 MM |
7281 | |
7282 | -- Attempting to create a pointer to reference type. | |
7283 | -- Attempting to create a reference to a reference type or | |
7284 | a reference to void. */ | |
0ecfe0b4 JM |
7285 | if (TREE_CODE (type) == REFERENCE_TYPE |
7286 | || (code == REFERENCE_TYPE && TREE_CODE (type) == VOID_TYPE)) | |
79a7c7fa | 7287 | { |
82a98427 | 7288 | static location_t last_loc; |
79a7c7fa JM |
7289 | |
7290 | /* We keep track of the last time we issued this error | |
7291 | message to avoid spewing a ton of messages during a | |
7292 | single bad template instantiation. */ | |
c2ea3a40 | 7293 | if (complain & tf_error |
93409b8c | 7294 | #ifdef USE_MAPPED_LOCATION |
9b60dfd7 | 7295 | && last_loc != input_location |
93409b8c | 7296 | #else |
82a98427 | 7297 | && (last_loc.line != input_line |
9b60dfd7 | 7298 | || last_loc.file != input_filename) |
93409b8c | 7299 | #endif |
9b60dfd7 | 7300 | ) |
79a7c7fa | 7301 | { |
0ecfe0b4 | 7302 | if (TREE_CODE (type) == VOID_TYPE) |
33bd39a2 | 7303 | error ("forming reference to void"); |
0ecfe0b4 | 7304 | else |
0f51ccfc | 7305 | error ("forming %s to reference type %qT", |
0cbd7506 MS |
7306 | (code == POINTER_TYPE) ? "pointer" : "reference", |
7307 | type); | |
82a98427 | 7308 | last_loc = input_location; |
79a7c7fa JM |
7309 | } |
7310 | ||
4393e105 | 7311 | return error_mark_node; |
79a7c7fa JM |
7312 | } |
7313 | else if (code == POINTER_TYPE) | |
46c895ac NS |
7314 | { |
7315 | r = build_pointer_type (type); | |
7316 | if (TREE_CODE (type) == METHOD_TYPE) | |
7317 | r = build_ptrmemfunc_type (r); | |
7318 | } | |
8d08fdba MS |
7319 | else |
7320 | r = build_reference_type (type); | |
adecb3f4 | 7321 | r = cp_build_qualified_type_real (r, TYPE_QUALS (t), complain); |
79a7c7fa | 7322 | |
a5f1c5f8 NS |
7323 | if (r != error_mark_node) |
7324 | /* Will this ever be needed for TYPE_..._TO values? */ | |
7325 | layout_type (r); | |
c8094d83 | 7326 | |
8d08fdba MS |
7327 | return r; |
7328 | } | |
a4443a08 | 7329 | case OFFSET_TYPE: |
0ecfe0b4 | 7330 | { |
4393e105 MM |
7331 | r = tsubst (TYPE_OFFSET_BASETYPE (t), args, complain, in_decl); |
7332 | if (r == error_mark_node || !IS_AGGR_TYPE (r)) | |
7333 | { | |
7334 | /* [temp.deduct] | |
7335 | ||
7336 | Type deduction may fail for any of the following | |
7337 | reasons: | |
c8094d83 | 7338 | |
4393e105 | 7339 | -- Attempting to create "pointer to member of T" when T |
0cbd7506 | 7340 | is not a class type. */ |
c2ea3a40 | 7341 | if (complain & tf_error) |
0f51ccfc | 7342 | error ("creating pointer to member of non-class type %qT", r); |
4393e105 MM |
7343 | return error_mark_node; |
7344 | } | |
46c895ac NS |
7345 | if (TREE_CODE (type) == REFERENCE_TYPE) |
7346 | { | |
4f09be91 | 7347 | if (complain & tf_error) |
0f51ccfc | 7348 | error ("creating pointer to member reference type %qT", type); |
cb6d4a9f VR |
7349 | return error_mark_node; |
7350 | } | |
7351 | if (TREE_CODE (type) == VOID_TYPE) | |
7352 | { | |
7353 | if (complain & tf_error) | |
7354 | error ("creating pointer to member of type void"); | |
46c895ac NS |
7355 | return error_mark_node; |
7356 | } | |
50bc768d | 7357 | gcc_assert (TREE_CODE (type) != METHOD_TYPE); |
46c895ac | 7358 | if (TREE_CODE (type) == FUNCTION_TYPE) |
a5ac359a | 7359 | { |
0cbd7506 MS |
7360 | /* The type of the implicit object parameter gets its |
7361 | cv-qualifiers from the FUNCTION_TYPE. */ | |
a5ac359a | 7362 | tree method_type; |
0cbd7506 MS |
7363 | tree this_type = cp_build_qualified_type (TYPE_MAIN_VARIANT (r), |
7364 | cp_type_quals (type)); | |
7365 | tree memptr; | |
7366 | method_type = build_method_type_directly (this_type, | |
43dc123f MM |
7367 | TREE_TYPE (type), |
7368 | TYPE_ARG_TYPES (type)); | |
0cbd7506 MS |
7369 | memptr = build_ptrmemfunc_type (build_pointer_type (method_type)); |
7370 | return cp_build_qualified_type_real (memptr, cp_type_quals (t), | |
7371 | complain); | |
a5ac359a | 7372 | } |
46c895ac | 7373 | else |
b7a78333 MM |
7374 | return cp_build_qualified_type_real (build_ptrmem_type (r, type), |
7375 | TYPE_QUALS (t), | |
7376 | complain); | |
0ecfe0b4 | 7377 | } |
8d08fdba MS |
7378 | case FUNCTION_TYPE: |
7379 | case METHOD_TYPE: | |
7380 | { | |
c11b6f21 | 7381 | tree fntype; |
c7222c02 | 7382 | tree specs; |
4393e105 MM |
7383 | fntype = tsubst_function_type (t, args, complain, in_decl); |
7384 | if (fntype == error_mark_node) | |
7385 | return error_mark_node; | |
cabc336a | 7386 | |
34cd5ae7 | 7387 | /* Substitute the exception specification. */ |
c8094d83 | 7388 | specs = tsubst_exception_specification (t, args, complain, |
c7222c02 | 7389 | in_decl); |
9f6206d9 VR |
7390 | if (specs == error_mark_node) |
7391 | return error_mark_node; | |
c7222c02 MM |
7392 | if (specs) |
7393 | fntype = build_exception_variant (fntype, specs); | |
c11b6f21 | 7394 | return fntype; |
8d08fdba MS |
7395 | } |
7396 | case ARRAY_TYPE: | |
7397 | { | |
4393e105 MM |
7398 | tree domain = tsubst (TYPE_DOMAIN (t), args, complain, in_decl); |
7399 | if (domain == error_mark_node) | |
7400 | return error_mark_node; | |
7401 | ||
7402 | /* As an optimization, we avoid regenerating the array type if | |
7403 | it will obviously be the same as T. */ | |
8d08fdba MS |
7404 | if (type == TREE_TYPE (t) && domain == TYPE_DOMAIN (t)) |
7405 | return t; | |
0ecfe0b4 | 7406 | |
c8094d83 | 7407 | /* These checks should match the ones in grokdeclarator. |
4393e105 | 7408 | |
c8094d83 MS |
7409 | [temp.deduct] |
7410 | ||
7411 | The deduction may fail for any of the following reasons: | |
4393e105 MM |
7412 | |
7413 | -- Attempting to create an array with an element type that | |
c8094d83 | 7414 | is void, a function type, or a reference type, or [DR337] |
cfb91b67 | 7415 | an abstract class type. */ |
c8094d83 | 7416 | if (TREE_CODE (type) == VOID_TYPE |
4393e105 MM |
7417 | || TREE_CODE (type) == FUNCTION_TYPE |
7418 | || TREE_CODE (type) == REFERENCE_TYPE) | |
0ecfe0b4 | 7419 | { |
c2ea3a40 | 7420 | if (complain & tf_error) |
0f51ccfc | 7421 | error ("creating array of %qT", type); |
4393e105 | 7422 | return error_mark_node; |
0ecfe0b4 | 7423 | } |
cfb91b67 GB |
7424 | if (CLASS_TYPE_P (type) && CLASSTYPE_PURE_VIRTUALS (type)) |
7425 | { | |
7426 | if (complain & tf_error) | |
c8094d83 | 7427 | error ("creating array of %qT, which is an abstract class type", |
cfb91b67 | 7428 | type); |
c8094d83 | 7429 | return error_mark_node; |
cfb91b67 | 7430 | } |
0ecfe0b4 | 7431 | |
8d08fdba MS |
7432 | r = build_cplus_array_type (type, domain); |
7433 | return r; | |
7434 | } | |
7435 | ||
8d08fdba | 7436 | case PLUS_EXPR: |
5566b478 | 7437 | case MINUS_EXPR: |
4393e105 | 7438 | { |
c2ea3a40 NS |
7439 | tree e1 = tsubst (TREE_OPERAND (t, 0), args, complain, in_decl); |
7440 | tree e2 = tsubst (TREE_OPERAND (t, 1), args, complain, in_decl); | |
4393e105 MM |
7441 | |
7442 | if (e1 == error_mark_node || e2 == error_mark_node) | |
7443 | return error_mark_node; | |
7444 | ||
7866705a | 7445 | return fold_build2 (TREE_CODE (t), TREE_TYPE (t), e1, e2); |
4393e105 | 7446 | } |
8d08fdba MS |
7447 | |
7448 | case NEGATE_EXPR: | |
7449 | case NOP_EXPR: | |
4393e105 | 7450 | { |
c2ea3a40 | 7451 | tree e = tsubst (TREE_OPERAND (t, 0), args, complain, in_decl); |
4393e105 MM |
7452 | if (e == error_mark_node) |
7453 | return error_mark_node; | |
7454 | ||
7866705a | 7455 | return fold_build1 (TREE_CODE (t), TREE_TYPE (t), e); |
4393e105 | 7456 | } |
8d08fdba | 7457 | |
5566b478 MS |
7458 | case TYPENAME_TYPE: |
7459 | { | |
4393e105 MM |
7460 | tree ctx = tsubst_aggr_type (TYPE_CONTEXT (t), args, complain, |
7461 | in_decl, /*entering_scope=*/1); | |
7462 | tree f = tsubst_copy (TYPENAME_TYPE_FULLNAME (t), args, | |
c8094d83 | 7463 | complain, in_decl); |
4393e105 MM |
7464 | |
7465 | if (ctx == error_mark_node || f == error_mark_node) | |
7466 | return error_mark_node; | |
ae58fa02 | 7467 | |
bf8f3f93 MM |
7468 | if (!IS_AGGR_TYPE (ctx)) |
7469 | { | |
c2ea3a40 | 7470 | if (complain & tf_error) |
0f51ccfc | 7471 | error ("%qT is not a class, struct, or union type", ctx); |
bf8f3f93 MM |
7472 | return error_mark_node; |
7473 | } | |
7474 | else if (!uses_template_parms (ctx) && !TYPE_BEING_DEFINED (ctx)) | |
7475 | { | |
7476 | /* Normally, make_typename_type does not require that the CTX | |
7477 | have complete type in order to allow things like: | |
c8094d83 | 7478 | |
0cbd7506 | 7479 | template <class T> struct S { typename S<T>::X Y; }; |
ae58fa02 | 7480 | |
bf8f3f93 MM |
7481 | But, such constructs have already been resolved by this |
7482 | point, so here CTX really should have complete type, unless | |
7483 | it's a partial instantiation. */ | |
4393e105 | 7484 | ctx = complete_type (ctx); |
d0f062fb | 7485 | if (!COMPLETE_TYPE_P (ctx)) |
4393e105 | 7486 | { |
c2ea3a40 | 7487 | if (complain & tf_error) |
7a228918 | 7488 | cxx_incomplete_type_error (NULL_TREE, ctx); |
4393e105 MM |
7489 | return error_mark_node; |
7490 | } | |
7491 | } | |
ae58fa02 | 7492 | |
fc6a28d7 | 7493 | f = make_typename_type (ctx, f, typename_type, |
4f2b0fb2 | 7494 | (complain & tf_error) | tf_keep_type_decl); |
f0bcd168 MM |
7495 | if (f == error_mark_node) |
7496 | return f; | |
0cbd7506 MS |
7497 | if (TREE_CODE (f) == TYPE_DECL) |
7498 | { | |
4f2b0fb2 | 7499 | complain |= tf_ignore_bad_quals; |
0cbd7506 MS |
7500 | f = TREE_TYPE (f); |
7501 | } | |
c8094d83 | 7502 | |
fc6a28d7 MM |
7503 | if (TREE_CODE (f) != TYPENAME_TYPE) |
7504 | { | |
7505 | if (TYPENAME_IS_ENUM_P (t) && TREE_CODE (f) != ENUMERAL_TYPE) | |
c8094d83 | 7506 | error ("%qT resolves to %qT, which is not an enumeration type", |
fc6a28d7 MM |
7507 | t, f); |
7508 | else if (TYPENAME_IS_CLASS_P (t) && !CLASS_TYPE_P (f)) | |
c8094d83 | 7509 | error ("%qT resolves to %qT, which is is not a class type", |
fc6a28d7 MM |
7510 | t, f); |
7511 | } | |
7512 | ||
0cbd7506 MS |
7513 | return cp_build_qualified_type_real |
7514 | (f, cp_type_quals (f) | cp_type_quals (t), complain); | |
5566b478 | 7515 | } |
c8094d83 | 7516 | |
b8c6534b KL |
7517 | case UNBOUND_CLASS_TEMPLATE: |
7518 | { | |
7519 | tree ctx = tsubst_aggr_type (TYPE_CONTEXT (t), args, complain, | |
7520 | in_decl, /*entering_scope=*/1); | |
7521 | tree name = TYPE_IDENTIFIER (t); | |
b939a023 | 7522 | tree parm_list = DECL_TEMPLATE_PARMS (TYPE_NAME (t)); |
b8c6534b KL |
7523 | |
7524 | if (ctx == error_mark_node || name == error_mark_node) | |
7525 | return error_mark_node; | |
7526 | ||
b939a023 KL |
7527 | if (parm_list) |
7528 | parm_list = tsubst_template_parms (parm_list, args, complain); | |
7529 | return make_unbound_class_template (ctx, name, parm_list, complain); | |
b8c6534b KL |
7530 | } |
7531 | ||
5566b478 | 7532 | case INDIRECT_REF: |
5566b478 | 7533 | case ADDR_EXPR: |
058b15c1 | 7534 | case CALL_EXPR: |
315fb5db | 7535 | gcc_unreachable (); |
5566b478 MS |
7536 | |
7537 | case ARRAY_REF: | |
4393e105 | 7538 | { |
c2ea3a40 NS |
7539 | tree e1 = tsubst (TREE_OPERAND (t, 0), args, complain, in_decl); |
7540 | tree e2 = tsubst_expr (TREE_OPERAND (t, 1), args, complain, in_decl); | |
4393e105 MM |
7541 | if (e1 == error_mark_node || e2 == error_mark_node) |
7542 | return error_mark_node; | |
7543 | ||
44de5aeb | 7544 | return build_nt (ARRAY_REF, e1, e2, NULL_TREE, NULL_TREE); |
4393e105 | 7545 | } |
5566b478 | 7546 | |
fc378698 | 7547 | case SCOPE_REF: |
4393e105 | 7548 | { |
c2ea3a40 | 7549 | tree e1 = tsubst (TREE_OPERAND (t, 0), args, complain, in_decl); |
4393e105 MM |
7550 | tree e2 = tsubst (TREE_OPERAND (t, 1), args, complain, in_decl); |
7551 | if (e1 == error_mark_node || e2 == error_mark_node) | |
7552 | return error_mark_node; | |
7553 | ||
02ed62dd MM |
7554 | return build_qualified_name (/*type=*/NULL_TREE, |
7555 | e1, e2, QUALIFIED_NAME_IS_TEMPLATE (t)); | |
4393e105 | 7556 | } |
fc378698 | 7557 | |
b894fc05 | 7558 | case TYPEOF_TYPE: |
4393e105 | 7559 | { |
b830b74c | 7560 | tree type; |
4393e105 | 7561 | |
eb34af89 RK |
7562 | type = finish_typeof (tsubst_expr (TYPEOF_TYPE_EXPR (t), args, |
7563 | complain, in_decl)); | |
b830b74c | 7564 | return cp_build_qualified_type_real (type, |
dce50630 | 7565 | cp_type_quals (t) |
b830b74c | 7566 | | cp_type_quals (type), |
dce50630 | 7567 | complain); |
4393e105 | 7568 | } |
b894fc05 | 7569 | |
8d08fdba | 7570 | default: |
9e637a26 | 7571 | sorry ("use of %qs in template", |
8d08fdba MS |
7572 | tree_code_name [(int) TREE_CODE (t)]); |
7573 | return error_mark_node; | |
7574 | } | |
7575 | } | |
7576 | ||
ee76b931 MM |
7577 | /* Like tsubst_expr for a BASELINK. OBJECT_TYPE, if non-NULL, is the |
7578 | type of the expression on the left-hand side of the "." or "->" | |
7579 | operator. */ | |
7580 | ||
7581 | static tree | |
7582 | tsubst_baselink (tree baselink, tree object_type, | |
7583 | tree args, tsubst_flags_t complain, tree in_decl) | |
7584 | { | |
7585 | tree name; | |
7586 | tree qualifying_scope; | |
7587 | tree fns; | |
7588 | tree template_args = 0; | |
7589 | bool template_id_p = false; | |
7590 | ||
7591 | /* A baselink indicates a function from a base class. The | |
7592 | BASELINK_ACCESS_BINFO and BASELINK_BINFO are going to have | |
7593 | non-dependent types; otherwise, the lookup could not have | |
7594 | succeeded. However, they may indicate bases of the template | |
c8094d83 | 7595 | class, rather than the instantiated class. |
ee76b931 MM |
7596 | |
7597 | In addition, lookups that were not ambiguous before may be | |
04c06002 | 7598 | ambiguous now. Therefore, we perform the lookup again. */ |
ee76b931 MM |
7599 | qualifying_scope = BINFO_TYPE (BASELINK_ACCESS_BINFO (baselink)); |
7600 | fns = BASELINK_FUNCTIONS (baselink); | |
7601 | if (TREE_CODE (fns) == TEMPLATE_ID_EXPR) | |
7602 | { | |
7603 | template_id_p = true; | |
7604 | template_args = TREE_OPERAND (fns, 1); | |
7605 | fns = TREE_OPERAND (fns, 0); | |
bf12d54d NS |
7606 | if (template_args) |
7607 | template_args = tsubst_template_args (template_args, args, | |
7608 | complain, in_decl); | |
ee76b931 MM |
7609 | } |
7610 | name = DECL_NAME (get_first_fn (fns)); | |
7611 | baselink = lookup_fnfields (qualifying_scope, name, /*protect=*/1); | |
c8094d83 | 7612 | |
9b60dfd7 MM |
7613 | /* If lookup found a single function, mark it as used at this |
7614 | point. (If it lookup found multiple functions the one selected | |
7615 | later by overload resolution will be marked as used at that | |
7616 | point.) */ | |
7617 | if (BASELINK_P (baselink)) | |
7618 | fns = BASELINK_FUNCTIONS (baselink); | |
7619 | if (!template_id_p && !really_overloaded_fn (fns)) | |
7620 | mark_used (OVL_CURRENT (fns)); | |
7621 | ||
7622 | /* Add back the template arguments, if present. */ | |
ee76b931 | 7623 | if (BASELINK_P (baselink) && template_id_p) |
c8094d83 | 7624 | BASELINK_FUNCTIONS (baselink) |
ee76b931 MM |
7625 | = build_nt (TEMPLATE_ID_EXPR, |
7626 | BASELINK_FUNCTIONS (baselink), | |
7627 | template_args); | |
9b60dfd7 | 7628 | |
ee76b931 MM |
7629 | if (!object_type) |
7630 | object_type = current_class_type; | |
c8094d83 | 7631 | return adjust_result_of_qualified_name_lookup (baselink, |
ee76b931 MM |
7632 | qualifying_scope, |
7633 | object_type); | |
7634 | } | |
7635 | ||
7636 | /* Like tsubst_expr for a SCOPE_REF, given by QUALIFIED_ID. DONE is | |
7637 | true if the qualified-id will be a postfix-expression in-and-of | |
7638 | itself; false if more of the postfix-expression follows the | |
7639 | QUALIFIED_ID. ADDRESS_P is true if the qualified-id is the operand | |
7640 | of "&". */ | |
7641 | ||
7642 | static tree | |
c8094d83 | 7643 | tsubst_qualified_id (tree qualified_id, tree args, |
ee76b931 MM |
7644 | tsubst_flags_t complain, tree in_decl, |
7645 | bool done, bool address_p) | |
7646 | { | |
7647 | tree expr; | |
7648 | tree scope; | |
7649 | tree name; | |
7650 | bool is_template; | |
7651 | tree template_args; | |
7652 | ||
50bc768d | 7653 | gcc_assert (TREE_CODE (qualified_id) == SCOPE_REF); |
ee76b931 | 7654 | |
ee76b931 MM |
7655 | /* Figure out what name to look up. */ |
7656 | name = TREE_OPERAND (qualified_id, 1); | |
7657 | if (TREE_CODE (name) == TEMPLATE_ID_EXPR) | |
7658 | { | |
7659 | is_template = true; | |
bf12d54d NS |
7660 | template_args = TREE_OPERAND (name, 1); |
7661 | if (template_args) | |
7662 | template_args = tsubst_template_args (template_args, args, | |
7663 | complain, in_decl); | |
ee76b931 MM |
7664 | name = TREE_OPERAND (name, 0); |
7665 | } | |
7666 | else | |
7667 | { | |
7668 | is_template = false; | |
7669 | template_args = NULL_TREE; | |
7670 | } | |
7671 | ||
6eeba0cc MM |
7672 | /* Substitute into the qualifying scope. When there are no ARGS, we |
7673 | are just trying to simplify a non-dependent expression. In that | |
7674 | case the qualifying scope may be dependent, and, in any case, | |
7675 | substituting will not help. */ | |
7676 | scope = TREE_OPERAND (qualified_id, 0); | |
7677 | if (args) | |
7678 | { | |
7679 | scope = tsubst (scope, args, complain, in_decl); | |
7680 | expr = tsubst_copy (name, args, complain, in_decl); | |
7681 | } | |
7682 | else | |
7683 | expr = name; | |
10b1d5e7 | 7684 | |
ab73670a | 7685 | if (dependent_type_p (scope)) |
02ed62dd MM |
7686 | return build_qualified_name (/*type=*/NULL_TREE, |
7687 | scope, expr, | |
7688 | QUALIFIED_NAME_IS_TEMPLATE (qualified_id)); | |
c8094d83 | 7689 | |
5e08432e | 7690 | if (!BASELINK_P (name) && !DECL_P (expr)) |
12483c9f | 7691 | { |
8ca4bf25 MM |
7692 | if (TREE_CODE (expr) == BIT_NOT_EXPR) |
7693 | /* If this were actually a destructor call, it would have been | |
7694 | parsed as such by the parser. */ | |
7695 | expr = error_mark_node; | |
7696 | else | |
7697 | expr = lookup_qualified_name (scope, expr, /*is_type_p=*/0, false); | |
12483c9f NS |
7698 | if (TREE_CODE (TREE_CODE (expr) == TEMPLATE_DECL |
7699 | ? DECL_TEMPLATE_RESULT (expr) : expr) == TYPE_DECL) | |
7700 | { | |
7701 | if (complain & tf_error) | |
b2693faf | 7702 | { |
0f51ccfc | 7703 | error ("dependent-name %qE is parsed as a non-type, but " |
b2693faf | 7704 | "instantiation yields a type", qualified_id); |
0f51ccfc | 7705 | inform ("say %<typename %E%> if a type is meant", qualified_id); |
b2693faf | 7706 | } |
12483c9f NS |
7707 | return error_mark_node; |
7708 | } | |
7709 | } | |
c8094d83 | 7710 | |
279b8466 | 7711 | if (DECL_P (expr)) |
8f78f01f MM |
7712 | { |
7713 | check_accessibility_of_qualified_id (expr, /*object_type=*/NULL_TREE, | |
7714 | scope); | |
7715 | /* Remember that there was a reference to this entity. */ | |
7716 | mark_used (expr); | |
7717 | } | |
7718 | ||
7719 | if (expr == error_mark_node || TREE_CODE (expr) == TREE_LIST) | |
7720 | { | |
7721 | if (complain & tf_error) | |
c8094d83 | 7722 | qualified_name_lookup_error (scope, |
8f78f01f MM |
7723 | TREE_OPERAND (qualified_id, 1), |
7724 | expr); | |
7725 | return error_mark_node; | |
7726 | } | |
ee76b931 MM |
7727 | |
7728 | if (is_template) | |
10b1d5e7 | 7729 | expr = lookup_template_function (expr, template_args); |
ee76b931 | 7730 | |
22038b2c | 7731 | if (expr == error_mark_node && complain & tf_error) |
8f78f01f MM |
7732 | qualified_name_lookup_error (scope, TREE_OPERAND (qualified_id, 1), |
7733 | expr); | |
22038b2c | 7734 | else if (TYPE_P (scope)) |
ee76b931 | 7735 | { |
c8094d83 | 7736 | expr = (adjust_result_of_qualified_name_lookup |
ee76b931 | 7737 | (expr, scope, current_class_type)); |
02ed62dd MM |
7738 | expr = (finish_qualified_id_expr |
7739 | (scope, expr, done, address_p, | |
7740 | QUALIFIED_NAME_IS_TEMPLATE (qualified_id), | |
7741 | /*template_arg_p=*/false)); | |
ee76b931 | 7742 | } |
c8094d83 | 7743 | |
aec5ba60 NS |
7744 | if (TREE_CODE (expr) != SCOPE_REF) |
7745 | expr = convert_from_reference (expr); | |
ee76b931 MM |
7746 | |
7747 | return expr; | |
7748 | } | |
7749 | ||
00d3396f JM |
7750 | /* Like tsubst, but deals with expressions. This function just replaces |
7751 | template parms; to finish processing the resultant expression, use | |
7752 | tsubst_expr. */ | |
7753 | ||
14d22dd6 | 7754 | static tree |
3a978d72 | 7755 | tsubst_copy (tree t, tree args, tsubst_flags_t complain, tree in_decl) |
5566b478 MS |
7756 | { |
7757 | enum tree_code code; | |
8452b1d3 | 7758 | tree r; |
8d08fdba | 7759 | |
5566b478 MS |
7760 | if (t == NULL_TREE || t == error_mark_node) |
7761 | return t; | |
7762 | ||
7763 | code = TREE_CODE (t); | |
b7484fbe | 7764 | |
5566b478 MS |
7765 | switch (code) |
7766 | { | |
7767 | case PARM_DECL: | |
a723baf1 | 7768 | r = retrieve_local_specialization (t); |
50bc768d | 7769 | gcc_assert (r != NULL); |
c0694c4b | 7770 | mark_used (r); |
a723baf1 | 7771 | return r; |
5566b478 MS |
7772 | |
7773 | case CONST_DECL: | |
ed44da02 MM |
7774 | { |
7775 | tree enum_type; | |
7776 | tree v; | |
7777 | ||
a723baf1 MM |
7778 | if (DECL_TEMPLATE_PARM_P (t)) |
7779 | return tsubst_copy (DECL_INITIAL (t), args, complain, in_decl); | |
7b6d72fc MM |
7780 | /* There is no need to substitute into namespace-scope |
7781 | enumerators. */ | |
7782 | if (DECL_NAMESPACE_SCOPE_P (t)) | |
ed44da02 | 7783 | return t; |
d5a10cf0 MM |
7784 | /* If ARGS is NULL, then T is known to be non-dependent. */ |
7785 | if (args == NULL_TREE) | |
8a784e4a | 7786 | return integral_constant_value (t); |
ed44da02 MM |
7787 | |
7788 | /* Unfortunately, we cannot just call lookup_name here. | |
9188c363 | 7789 | Consider: |
c8094d83 | 7790 | |
9188c363 MM |
7791 | template <int I> int f() { |
7792 | enum E { a = I }; | |
7793 | struct S { void g() { E e = a; } }; | |
7794 | }; | |
c8094d83 | 7795 | |
9188c363 MM |
7796 | When we instantiate f<7>::S::g(), say, lookup_name is not |
7797 | clever enough to find f<7>::a. */ | |
c8094d83 MS |
7798 | enum_type |
7799 | = tsubst_aggr_type (TREE_TYPE (t), args, complain, in_decl, | |
ed44da02 MM |
7800 | /*entering_scope=*/0); |
7801 | ||
c8094d83 MS |
7802 | for (v = TYPE_VALUES (enum_type); |
7803 | v != NULL_TREE; | |
ed44da02 MM |
7804 | v = TREE_CHAIN (v)) |
7805 | if (TREE_PURPOSE (v) == DECL_NAME (t)) | |
7806 | return TREE_VALUE (v); | |
7807 | ||
7808 | /* We didn't find the name. That should never happen; if | |
7809 | name-lookup found it during preliminary parsing, we | |
7810 | should find it again here during instantiation. */ | |
315fb5db | 7811 | gcc_unreachable (); |
ed44da02 | 7812 | } |
db04386f | 7813 | return t; |
ed44da02 | 7814 | |
5566b478 MS |
7815 | case FIELD_DECL: |
7816 | if (DECL_CONTEXT (t)) | |
7817 | { | |
0978790f | 7818 | tree ctx; |
0978790f | 7819 | |
4393e105 | 7820 | ctx = tsubst_aggr_type (DECL_CONTEXT (t), args, complain, in_decl, |
36a117a5 | 7821 | /*entering_scope=*/1); |
0978790f | 7822 | if (ctx != DECL_CONTEXT (t)) |
bad1f462 KL |
7823 | { |
7824 | tree r = lookup_field (ctx, DECL_NAME (t), 0, false); | |
7825 | if (!r) | |
7826 | { | |
7827 | if (complain & tf_error) | |
7828 | error ("using invalid field %qD", t); | |
7829 | return error_mark_node; | |
7830 | } | |
7831 | return r; | |
7832 | } | |
5566b478 | 7833 | } |
c8094d83 | 7834 | |
5566b478 MS |
7835 | return t; |
7836 | ||
7837 | case VAR_DECL: | |
7838 | case FUNCTION_DECL: | |
a723baf1 MM |
7839 | if ((DECL_LANG_SPECIFIC (t) && DECL_TEMPLATE_INFO (t)) |
7840 | || local_variable_p (t)) | |
4393e105 | 7841 | t = tsubst (t, args, complain, in_decl); |
5566b478 MS |
7842 | mark_used (t); |
7843 | return t; | |
7844 | ||
a723baf1 | 7845 | case BASELINK: |
ee76b931 | 7846 | return tsubst_baselink (t, current_class_type, args, complain, in_decl); |
a723baf1 | 7847 | |
98c1c668 | 7848 | case TEMPLATE_DECL: |
a723baf1 | 7849 | if (DECL_TEMPLATE_TEMPLATE_PARM_P (t)) |
c8094d83 | 7850 | return tsubst (TREE_TYPE (DECL_TEMPLATE_RESULT (t)), |
a723baf1 | 7851 | args, complain, in_decl); |
c7222c02 | 7852 | else if (DECL_FUNCTION_TEMPLATE_P (t) && DECL_MEMBER_TEMPLATE_P (t)) |
4393e105 | 7853 | return tsubst (t, args, complain, in_decl); |
fcea7401 KL |
7854 | else if (DECL_CLASS_SCOPE_P (t) |
7855 | && uses_template_parms (DECL_CONTEXT (t))) | |
7856 | { | |
7857 | /* Template template argument like the following example need | |
7858 | special treatment: | |
7859 | ||
7860 | template <template <class> class TT> struct C {}; | |
7861 | template <class T> struct D { | |
7862 | template <class U> struct E {}; | |
0cbd7506 | 7863 | C<E> c; // #1 |
fcea7401 KL |
7864 | }; |
7865 | D<int> d; // #2 | |
7866 | ||
7867 | We are processing the template argument `E' in #1 for | |
7868 | the template instantiation #2. Originally, `E' is a | |
7869 | TEMPLATE_DECL with `D<T>' as its DECL_CONTEXT. Now we | |
7870 | have to substitute this with one having context `D<int>'. */ | |
7871 | ||
7872 | tree context = tsubst (DECL_CONTEXT (t), args, complain, in_decl); | |
7873 | return lookup_field (context, DECL_NAME(t), 0, false); | |
7874 | } | |
98c1c668 | 7875 | else |
fcea7401 | 7876 | /* Ordinary template template argument. */ |
98c1c668 JM |
7877 | return t; |
7878 | ||
5566b478 MS |
7879 | case CAST_EXPR: |
7880 | case REINTERPRET_CAST_EXPR: | |
e92cc029 MS |
7881 | case CONST_CAST_EXPR: |
7882 | case STATIC_CAST_EXPR: | |
7883 | case DYNAMIC_CAST_EXPR: | |
51924768 | 7884 | case NOP_EXPR: |
5566b478 | 7885 | return build1 |
4393e105 MM |
7886 | (code, tsubst (TREE_TYPE (t), args, complain, in_decl), |
7887 | tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl)); | |
5566b478 MS |
7888 | |
7889 | case INDIRECT_REF: | |
5566b478 MS |
7890 | case NEGATE_EXPR: |
7891 | case TRUTH_NOT_EXPR: | |
b87692e5 | 7892 | case BIT_NOT_EXPR: |
5566b478 | 7893 | case ADDR_EXPR: |
392e3d51 | 7894 | case UNARY_PLUS_EXPR: /* Unary + */ |
5566b478 | 7895 | case SIZEOF_EXPR: |
abff8e06 | 7896 | case ALIGNOF_EXPR: |
5566b478 | 7897 | case ARROW_EXPR: |
fc378698 | 7898 | case THROW_EXPR: |
5156628f | 7899 | case TYPEID_EXPR: |
f5733617 SS |
7900 | case REALPART_EXPR: |
7901 | case IMAGPART_EXPR: | |
5566b478 | 7902 | return build1 |
6a629cac | 7903 | (code, tsubst (TREE_TYPE (t), args, complain, in_decl), |
4393e105 | 7904 | tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl)); |
5566b478 | 7905 | |
a723baf1 MM |
7906 | case COMPONENT_REF: |
7907 | { | |
7908 | tree object; | |
7909 | tree name; | |
7910 | ||
7911 | object = tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl); | |
7912 | name = TREE_OPERAND (t, 1); | |
c8094d83 | 7913 | if (TREE_CODE (name) == BIT_NOT_EXPR) |
a723baf1 MM |
7914 | { |
7915 | name = tsubst_copy (TREE_OPERAND (name, 0), args, | |
7916 | complain, in_decl); | |
7917 | name = build1 (BIT_NOT_EXPR, NULL_TREE, name); | |
7918 | } | |
7919 | else if (TREE_CODE (name) == SCOPE_REF | |
7920 | && TREE_CODE (TREE_OPERAND (name, 1)) == BIT_NOT_EXPR) | |
7921 | { | |
7922 | tree base = tsubst_copy (TREE_OPERAND (name, 0), args, | |
7923 | complain, in_decl); | |
7924 | name = TREE_OPERAND (name, 1); | |
7925 | name = tsubst_copy (TREE_OPERAND (name, 0), args, | |
7926 | complain, in_decl); | |
7927 | name = build1 (BIT_NOT_EXPR, NULL_TREE, name); | |
02ed62dd MM |
7928 | name = build_qualified_name (/*type=*/NULL_TREE, |
7929 | base, name, | |
7930 | /*template_p=*/false); | |
a723baf1 | 7931 | } |
ee76b931 | 7932 | else if (TREE_CODE (name) == BASELINK) |
c8094d83 MS |
7933 | name = tsubst_baselink (name, |
7934 | non_reference (TREE_TYPE (object)), | |
7935 | args, complain, | |
ee76b931 | 7936 | in_decl); |
a723baf1 | 7937 | else |
ee76b931 | 7938 | name = tsubst_copy (name, args, complain, in_decl); |
44de5aeb | 7939 | return build_nt (COMPONENT_REF, object, name, NULL_TREE); |
a723baf1 MM |
7940 | } |
7941 | ||
5566b478 MS |
7942 | case PLUS_EXPR: |
7943 | case MINUS_EXPR: | |
7944 | case MULT_EXPR: | |
7945 | case TRUNC_DIV_EXPR: | |
7946 | case CEIL_DIV_EXPR: | |
7947 | case FLOOR_DIV_EXPR: | |
7948 | case ROUND_DIV_EXPR: | |
7949 | case EXACT_DIV_EXPR: | |
7950 | case BIT_AND_EXPR: | |
5566b478 MS |
7951 | case BIT_IOR_EXPR: |
7952 | case BIT_XOR_EXPR: | |
7953 | case TRUNC_MOD_EXPR: | |
7954 | case FLOOR_MOD_EXPR: | |
7955 | case TRUTH_ANDIF_EXPR: | |
7956 | case TRUTH_ORIF_EXPR: | |
7957 | case TRUTH_AND_EXPR: | |
7958 | case TRUTH_OR_EXPR: | |
7959 | case RSHIFT_EXPR: | |
7960 | case LSHIFT_EXPR: | |
7961 | case RROTATE_EXPR: | |
7962 | case LROTATE_EXPR: | |
7963 | case EQ_EXPR: | |
7964 | case NE_EXPR: | |
7965 | case MAX_EXPR: | |
7966 | case MIN_EXPR: | |
7967 | case LE_EXPR: | |
7968 | case GE_EXPR: | |
7969 | case LT_EXPR: | |
7970 | case GT_EXPR: | |
5566b478 | 7971 | case COMPOUND_EXPR: |
5566b478 MS |
7972 | case DOTSTAR_EXPR: |
7973 | case MEMBER_REF: | |
519c9806 MM |
7974 | case PREDECREMENT_EXPR: |
7975 | case PREINCREMENT_EXPR: | |
7976 | case POSTDECREMENT_EXPR: | |
7977 | case POSTINCREMENT_EXPR: | |
5566b478 | 7978 | return build_nt |
4393e105 MM |
7979 | (code, tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl), |
7980 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl)); | |
5566b478 | 7981 | |
02ed62dd MM |
7982 | case SCOPE_REF: |
7983 | return build_qualified_name (/*type=*/NULL_TREE, | |
7984 | tsubst_copy (TREE_OPERAND (t, 0), | |
7985 | args, complain, in_decl), | |
7986 | tsubst_copy (TREE_OPERAND (t, 1), | |
7987 | args, complain, in_decl), | |
7988 | QUALIFIED_NAME_IS_TEMPLATE (t)); | |
7989 | ||
d8987adb NS |
7990 | case ARRAY_REF: |
7991 | return build_nt | |
7992 | (ARRAY_REF, | |
7993 | tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl), | |
7994 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl), | |
7995 | NULL_TREE, NULL_TREE); | |
7996 | ||
5566b478 | 7997 | case CALL_EXPR: |
c8094d83 | 7998 | return build_nt (code, |
a723baf1 MM |
7999 | tsubst_copy (TREE_OPERAND (t, 0), args, |
8000 | complain, in_decl), | |
8001 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, | |
8002 | in_decl), | |
8003 | NULL_TREE); | |
5566b478 | 8004 | |
5566b478 MS |
8005 | case COND_EXPR: |
8006 | case MODOP_EXPR: | |
40242ccf | 8007 | case PSEUDO_DTOR_EXPR: |
67da3287 | 8008 | { |
8452b1d3 | 8009 | r = build_nt |
4393e105 MM |
8010 | (code, tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl), |
8011 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl), | |
8012 | tsubst_copy (TREE_OPERAND (t, 2), args, complain, in_decl)); | |
e4c2c34b | 8013 | TREE_NO_WARNING (r) = TREE_NO_WARNING (t); |
67da3287 MM |
8014 | return r; |
8015 | } | |
5566b478 MS |
8016 | |
8017 | case NEW_EXPR: | |
8018 | { | |
8452b1d3 | 8019 | r = build_nt |
4393e105 MM |
8020 | (code, tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl), |
8021 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl), | |
8022 | tsubst_copy (TREE_OPERAND (t, 2), args, complain, in_decl)); | |
5566b478 MS |
8023 | NEW_EXPR_USE_GLOBAL (r) = NEW_EXPR_USE_GLOBAL (t); |
8024 | return r; | |
8025 | } | |
8026 | ||
8027 | case DELETE_EXPR: | |
8028 | { | |
8452b1d3 | 8029 | r = build_nt |
4393e105 MM |
8030 | (code, tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl), |
8031 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl)); | |
5566b478 MS |
8032 | DELETE_EXPR_USE_GLOBAL (r) = DELETE_EXPR_USE_GLOBAL (t); |
8033 | DELETE_EXPR_USE_VEC (r) = DELETE_EXPR_USE_VEC (t); | |
8034 | return r; | |
8035 | } | |
8036 | ||
386b8a85 JM |
8037 | case TEMPLATE_ID_EXPR: |
8038 | { | |
0cbd7506 | 8039 | /* Substituted template arguments */ |
a91db711 NS |
8040 | tree fn = TREE_OPERAND (t, 0); |
8041 | tree targs = TREE_OPERAND (t, 1); | |
856216bb | 8042 | |
a91db711 | 8043 | fn = tsubst_copy (fn, args, complain, in_decl); |
bf12d54d NS |
8044 | if (targs) |
8045 | targs = tsubst_template_args (targs, args, complain, in_decl); | |
c8094d83 | 8046 | |
a91db711 | 8047 | return lookup_template_function (fn, targs); |
386b8a85 JM |
8048 | } |
8049 | ||
5566b478 MS |
8050 | case TREE_LIST: |
8051 | { | |
8052 | tree purpose, value, chain; | |
8053 | ||
8054 | if (t == void_list_node) | |
8055 | return t; | |
8056 | ||
8057 | purpose = TREE_PURPOSE (t); | |
8058 | if (purpose) | |
4393e105 | 8059 | purpose = tsubst_copy (purpose, args, complain, in_decl); |
5566b478 MS |
8060 | value = TREE_VALUE (t); |
8061 | if (value) | |
4393e105 | 8062 | value = tsubst_copy (value, args, complain, in_decl); |
5566b478 MS |
8063 | chain = TREE_CHAIN (t); |
8064 | if (chain && chain != void_type_node) | |
4393e105 | 8065 | chain = tsubst_copy (chain, args, complain, in_decl); |
5566b478 MS |
8066 | if (purpose == TREE_PURPOSE (t) |
8067 | && value == TREE_VALUE (t) | |
8068 | && chain == TREE_CHAIN (t)) | |
8069 | return t; | |
8070 | return tree_cons (purpose, value, chain); | |
8071 | } | |
8072 | ||
8073 | case RECORD_TYPE: | |
8074 | case UNION_TYPE: | |
8075 | case ENUMERAL_TYPE: | |
8076 | case INTEGER_TYPE: | |
8077 | case TEMPLATE_TYPE_PARM: | |
73b0fce8 | 8078 | case TEMPLATE_TEMPLATE_PARM: |
a1281f45 | 8079 | case BOUND_TEMPLATE_TEMPLATE_PARM: |
f84b4be9 | 8080 | case TEMPLATE_PARM_INDEX: |
5566b478 MS |
8081 | case POINTER_TYPE: |
8082 | case REFERENCE_TYPE: | |
8083 | case OFFSET_TYPE: | |
8084 | case FUNCTION_TYPE: | |
8085 | case METHOD_TYPE: | |
8086 | case ARRAY_TYPE: | |
8087 | case TYPENAME_TYPE: | |
b8c6534b | 8088 | case UNBOUND_CLASS_TEMPLATE: |
2a2b1d56 | 8089 | case TYPEOF_TYPE: |
f84b4be9 | 8090 | case TYPE_DECL: |
4393e105 | 8091 | return tsubst (t, args, complain, in_decl); |
5566b478 | 8092 | |
e92cc029 | 8093 | case IDENTIFIER_NODE: |
421844e7 | 8094 | if (IDENTIFIER_TYPENAME_P (t)) |
1f6e1acc AS |
8095 | { |
8096 | tree new_type = tsubst (TREE_TYPE (t), args, complain, in_decl); | |
1f84ec23 | 8097 | return mangle_conv_op_name_for_type (new_type); |
1f6e1acc | 8098 | } |
e92cc029 MS |
8099 | else |
8100 | return t; | |
8101 | ||
5156628f | 8102 | case CONSTRUCTOR: |
4038c495 GB |
8103 | /* This is handled by tsubst_copy_and_build. */ |
8104 | gcc_unreachable (); | |
5156628f | 8105 | |
371534a9 | 8106 | case VA_ARG_EXPR: |
ea333e1c | 8107 | return build_x_va_arg (tsubst_copy (TREE_OPERAND (t, 0), args, complain, |
c2ea3a40 NS |
8108 | in_decl), |
8109 | tsubst (TREE_TYPE (t), args, complain, in_decl)); | |
f9817201 | 8110 | |
543a0daa RH |
8111 | case CLEANUP_POINT_EXPR: |
8112 | /* We shouldn't have built any of these during initial template | |
8113 | generation. Instead, they should be built during instantiation | |
8114 | in response to the saved STMT_IS_FULL_EXPR_P setting. */ | |
315fb5db | 8115 | gcc_unreachable (); |
543a0daa | 8116 | |
5566b478 MS |
8117 | default: |
8118 | return t; | |
8119 | } | |
8120 | } | |
8121 | ||
cc23546e JO |
8122 | /* Like tsubst_copy for expressions, etc. but also does semantic |
8123 | processing. */ | |
00d3396f | 8124 | |
14d22dd6 | 8125 | static tree |
3a978d72 | 8126 | tsubst_expr (tree t, tree args, tsubst_flags_t complain, tree in_decl) |
5566b478 | 8127 | { |
fd10dd09 | 8128 | tree stmt, tmp; |
558475f0 | 8129 | |
5566b478 MS |
8130 | if (t == NULL_TREE || t == error_mark_node) |
8131 | return t; | |
8132 | ||
93409b8c PB |
8133 | if (EXPR_HAS_LOCATION (t)) |
8134 | input_location = EXPR_LOCATION (t); | |
7c34ced1 RH |
8135 | if (STATEMENT_CODE_P (TREE_CODE (t))) |
8136 | current_stmt_tree ()->stmts_are_full_exprs_p = STMT_IS_FULL_EXPR_P (t); | |
8137 | ||
5566b478 | 8138 | switch (TREE_CODE (t)) |
8d08fdba | 8139 | { |
325c3691 RH |
8140 | case STATEMENT_LIST: |
8141 | { | |
8142 | tree_stmt_iterator i; | |
8143 | for (i = tsi_start (t); !tsi_end_p (i); tsi_next (&i)) | |
8144 | tsubst_expr (tsi_stmt (i), args, complain, in_decl); | |
8145 | break; | |
8146 | } | |
8147 | ||
558475f0 | 8148 | case CTOR_INITIALIZER: |
c8094d83 | 8149 | finish_mem_initializers (tsubst_initializer_list |
2282d28d MM |
8150 | (TREE_OPERAND (t, 0), args)); |
8151 | break; | |
558475f0 | 8152 | |
5088b058 RH |
8153 | case RETURN_EXPR: |
8154 | finish_return_stmt (tsubst_expr (TREE_OPERAND (t, 0), | |
4393e105 | 8155 | args, complain, in_decl)); |
5566b478 MS |
8156 | break; |
8157 | ||
8158 | case EXPR_STMT: | |
7c34ced1 RH |
8159 | tmp = tsubst_expr (EXPR_STMT_EXPR (t), args, complain, in_decl); |
8160 | if (EXPR_STMT_STMT_EXPR_RESULT (t)) | |
8161 | finish_stmt_expr_expr (tmp, cur_stmt_expr); | |
8162 | else | |
8163 | finish_expr_stmt (tmp); | |
8164 | break; | |
5566b478 | 8165 | |
9da99f7d | 8166 | case USING_STMT: |
9da99f7d NS |
8167 | do_using_directive (tsubst_expr (USING_STMT_NAMESPACE (t), |
8168 | args, complain, in_decl)); | |
8169 | break; | |
c8094d83 | 8170 | |
350fae66 | 8171 | case DECL_EXPR: |
5566b478 | 8172 | { |
e0942dcd MM |
8173 | tree decl; |
8174 | tree init; | |
5566b478 | 8175 | |
350fae66 | 8176 | decl = DECL_EXPR_DECL (t); |
acef433b MM |
8177 | if (TREE_CODE (decl) == LABEL_DECL) |
8178 | finish_label_decl (DECL_NAME (decl)); | |
fbfe8c9e NS |
8179 | else if (TREE_CODE (decl) == USING_DECL) |
8180 | { | |
98ed9dae | 8181 | tree scope = USING_DECL_SCOPE (decl); |
fbfe8c9e | 8182 | tree name = DECL_NAME (decl); |
22038b2c | 8183 | tree decl; |
c8094d83 | 8184 | |
fbfe8c9e | 8185 | scope = tsubst_expr (scope, args, complain, in_decl); |
22038b2c | 8186 | decl = lookup_qualified_name (scope, name, |
12483c9f NS |
8187 | /*is_type_p=*/false, |
8188 | /*complain=*/false); | |
8f78f01f MM |
8189 | if (decl == error_mark_node || TREE_CODE (decl) == TREE_LIST) |
8190 | qualified_name_lookup_error (scope, name, decl); | |
22038b2c | 8191 | else |
ed5f054f | 8192 | do_local_using_decl (decl, scope, name); |
fbfe8c9e | 8193 | } |
acef433b MM |
8194 | else |
8195 | { | |
8196 | init = DECL_INITIAL (decl); | |
8197 | decl = tsubst (decl, args, complain, in_decl); | |
ce2e5191 NS |
8198 | if (decl != error_mark_node) |
8199 | { | |
0cbd7506 MS |
8200 | if (init) |
8201 | DECL_INITIAL (decl) = error_mark_node; | |
8202 | /* By marking the declaration as instantiated, we avoid | |
8203 | trying to instantiate it. Since instantiate_decl can't | |
8204 | handle local variables, and since we've already done | |
8205 | all that needs to be done, that's the right thing to | |
8206 | do. */ | |
8207 | if (TREE_CODE (decl) == VAR_DECL) | |
8208 | DECL_TEMPLATE_INSTANTIATED (decl) = 1; | |
edebf865 MM |
8209 | if (TREE_CODE (decl) == VAR_DECL |
8210 | && ANON_AGGR_TYPE_P (TREE_TYPE (decl))) | |
8211 | /* Anonymous aggregates are a special case. */ | |
8212 | finish_anon_union (decl); | |
c8094d83 | 8213 | else |
ed2fa432 | 8214 | { |
edebf865 | 8215 | maybe_push_decl (decl); |
39703eb9 MM |
8216 | if (TREE_CODE (decl) == VAR_DECL |
8217 | && DECL_PRETTY_FUNCTION_P (decl)) | |
edebf865 MM |
8218 | { |
8219 | /* For __PRETTY_FUNCTION__ we have to adjust the | |
8220 | initializer. */ | |
8221 | const char *const name | |
8222 | = cxx_printable_name (current_function_decl, 2); | |
bb885938 | 8223 | init = cp_fname_init (name, &TREE_TYPE (decl)); |
edebf865 MM |
8224 | } |
8225 | else | |
8226 | init = tsubst_expr (init, args, complain, in_decl); | |
8227 | cp_finish_decl (decl, init, NULL_TREE, 0); | |
ed2fa432 | 8228 | } |
ce2e5191 | 8229 | } |
acef433b | 8230 | } |
fd10dd09 | 8231 | |
350fae66 | 8232 | /* A DECL_EXPR can also be used as an expression, in the condition |
325c3691 RH |
8233 | clause of an if/for/while construct. */ |
8234 | return decl; | |
5566b478 | 8235 | } |
8d08fdba | 8236 | |
5566b478 | 8237 | case FOR_STMT: |
7c34ced1 RH |
8238 | stmt = begin_for_stmt (); |
8239 | tsubst_expr (FOR_INIT_STMT (t), args, complain, in_decl); | |
8240 | finish_for_init_stmt (stmt); | |
8241 | tmp = tsubst_expr (FOR_COND (t), args, complain, in_decl); | |
8242 | finish_for_cond (tmp, stmt); | |
8243 | tmp = tsubst_expr (FOR_EXPR (t), args, complain, in_decl); | |
8244 | finish_for_expr (tmp, stmt); | |
8245 | tsubst_expr (FOR_BODY (t), args, complain, in_decl); | |
8246 | finish_for_stmt (stmt); | |
5566b478 | 8247 | break; |
8d08fdba | 8248 | |
5566b478 | 8249 | case WHILE_STMT: |
7c34ced1 RH |
8250 | stmt = begin_while_stmt (); |
8251 | tmp = tsubst_expr (WHILE_COND (t), args, complain, in_decl); | |
8252 | finish_while_stmt_cond (tmp, stmt); | |
8253 | tsubst_expr (WHILE_BODY (t), args, complain, in_decl); | |
8254 | finish_while_stmt (stmt); | |
5566b478 | 8255 | break; |
8d08fdba | 8256 | |
5566b478 | 8257 | case DO_STMT: |
7c34ced1 RH |
8258 | stmt = begin_do_stmt (); |
8259 | tsubst_expr (DO_BODY (t), args, complain, in_decl); | |
8260 | finish_do_body (stmt); | |
8261 | tmp = tsubst_expr (DO_COND (t), args, complain, in_decl); | |
8262 | finish_do_stmt (tmp, stmt); | |
5566b478 | 8263 | break; |
a0a33927 | 8264 | |
5566b478 | 8265 | case IF_STMT: |
7c34ced1 RH |
8266 | stmt = begin_if_stmt (); |
8267 | tmp = tsubst_expr (IF_COND (t), args, complain, in_decl); | |
8268 | finish_if_stmt_cond (tmp, stmt); | |
8269 | tsubst_expr (THEN_CLAUSE (t), args, complain, in_decl); | |
8270 | finish_then_clause (stmt); | |
8d08fdba | 8271 | |
7c34ced1 RH |
8272 | if (ELSE_CLAUSE (t)) |
8273 | { | |
8274 | begin_else_clause (stmt); | |
8275 | tsubst_expr (ELSE_CLAUSE (t), args, complain, in_decl); | |
8276 | finish_else_clause (stmt); | |
8277 | } | |
8278 | ||
8279 | finish_if_stmt (stmt); | |
5566b478 | 8280 | break; |
8d08fdba | 8281 | |
5882f0f3 | 8282 | case BIND_EXPR: |
7c34ced1 RH |
8283 | if (BIND_EXPR_BODY_BLOCK (t)) |
8284 | stmt = begin_function_body (); | |
8285 | else | |
8286 | stmt = begin_compound_stmt (BIND_EXPR_TRY_BLOCK (t) | |
8287 | ? BCS_TRY_BLOCK : 0); | |
ade3dc07 | 8288 | |
7c34ced1 | 8289 | tsubst_expr (BIND_EXPR_BODY (t), args, complain, in_decl); |
ade3dc07 | 8290 | |
7c34ced1 RH |
8291 | if (BIND_EXPR_BODY_BLOCK (t)) |
8292 | finish_function_body (stmt); | |
8293 | else | |
8294 | finish_compound_stmt (stmt); | |
5566b478 | 8295 | break; |
8d08fdba | 8296 | |
5566b478 | 8297 | case BREAK_STMT: |
ad321293 | 8298 | finish_break_stmt (); |
5566b478 | 8299 | break; |
8d08fdba | 8300 | |
6467930b | 8301 | case CONTINUE_STMT: |
ad321293 | 8302 | finish_continue_stmt (); |
6467930b MS |
8303 | break; |
8304 | ||
5566b478 | 8305 | case SWITCH_STMT: |
7c34ced1 | 8306 | stmt = begin_switch_stmt (); |
ebaae582 | 8307 | tmp = tsubst_expr (SWITCH_STMT_COND (t), args, complain, in_decl); |
7c34ced1 | 8308 | finish_switch_cond (tmp, stmt); |
ebaae582 | 8309 | tsubst_expr (SWITCH_STMT_BODY (t), args, complain, in_decl); |
7c34ced1 | 8310 | finish_switch_stmt (stmt); |
5566b478 MS |
8311 | break; |
8312 | ||
8c161995 | 8313 | case CASE_LABEL_EXPR: |
4393e105 | 8314 | finish_case_label (tsubst_expr (CASE_LOW (t), args, complain, in_decl), |
56cb9733 MM |
8315 | tsubst_expr (CASE_HIGH (t), args, complain, |
8316 | in_decl)); | |
5566b478 MS |
8317 | break; |
8318 | ||
9e14e18f | 8319 | case LABEL_EXPR: |
9e14e18f | 8320 | finish_label_stmt (DECL_NAME (LABEL_EXPR_LABEL (t))); |
5566b478 MS |
8321 | break; |
8322 | ||
9e14e18f | 8323 | case GOTO_EXPR: |
fd10dd09 JM |
8324 | tmp = GOTO_DESTINATION (t); |
8325 | if (TREE_CODE (tmp) != LABEL_DECL) | |
aa09da44 MM |
8326 | /* Computed goto's must be tsubst'd into. On the other hand, |
8327 | non-computed gotos must not be; the identifier in question | |
8328 | will have no binding. */ | |
fd10dd09 | 8329 | tmp = tsubst_expr (tmp, args, complain, in_decl); |
3fa56191 | 8330 | else |
fd10dd09 JM |
8331 | tmp = DECL_NAME (tmp); |
8332 | finish_goto_stmt (tmp); | |
ad321293 MM |
8333 | break; |
8334 | ||
e130a54b | 8335 | case ASM_EXPR: |
c87978aa | 8336 | tmp = finish_asm_stmt |
6de9cd9a | 8337 | (ASM_VOLATILE_P (t), |
c87978aa JM |
8338 | tsubst_expr (ASM_STRING (t), args, complain, in_decl), |
8339 | tsubst_expr (ASM_OUTPUTS (t), args, complain, in_decl), | |
c8094d83 | 8340 | tsubst_expr (ASM_INPUTS (t), args, complain, in_decl), |
c87978aa | 8341 | tsubst_expr (ASM_CLOBBERS (t), args, complain, in_decl)); |
131263fa AP |
8342 | { |
8343 | tree asm_expr = tmp; | |
8344 | if (TREE_CODE (asm_expr) == CLEANUP_POINT_EXPR) | |
8345 | asm_expr = TREE_OPERAND (asm_expr, 0); | |
8346 | ASM_INPUT_P (asm_expr) = ASM_INPUT_P (t); | |
8347 | } | |
5566b478 | 8348 | break; |
faf5394a MS |
8349 | |
8350 | case TRY_BLOCK: | |
f1dedc31 | 8351 | if (CLEANUP_P (t)) |
62409b39 | 8352 | { |
57b52417 | 8353 | stmt = begin_try_block (); |
62409b39 MM |
8354 | tsubst_expr (TRY_STMTS (t), args, complain, in_decl); |
8355 | finish_cleanup_try_block (stmt); | |
8356 | finish_cleanup (tsubst_expr (TRY_HANDLERS (t), args, | |
8357 | complain, in_decl), | |
8358 | stmt); | |
8359 | } | |
f1dedc31 MM |
8360 | else |
8361 | { | |
62409b39 MM |
8362 | if (FN_TRY_BLOCK_P (t)) |
8363 | stmt = begin_function_try_block (); | |
8364 | else | |
8365 | stmt = begin_try_block (); | |
8366 | ||
8367 | tsubst_expr (TRY_STMTS (t), args, complain, in_decl); | |
8368 | ||
8369 | if (FN_TRY_BLOCK_P (t)) | |
8370 | finish_function_try_block (stmt); | |
8371 | else | |
8372 | finish_try_block (stmt); | |
8373 | ||
fd10dd09 | 8374 | tsubst_expr (TRY_HANDLERS (t), args, complain, in_decl); |
84df082b MM |
8375 | if (FN_TRY_BLOCK_P (t)) |
8376 | finish_function_handler_sequence (stmt); | |
8377 | else | |
8378 | finish_handler_sequence (stmt); | |
f1dedc31 | 8379 | } |
faf5394a | 8380 | break; |
c8094d83 | 8381 | |
faf5394a | 8382 | case HANDLER: |
b35d4555 MM |
8383 | { |
8384 | tree decl; | |
b35d4555 | 8385 | |
b35d4555 MM |
8386 | stmt = begin_handler (); |
8387 | if (HANDLER_PARMS (t)) | |
8388 | { | |
325c3691 | 8389 | decl = HANDLER_PARMS (t); |
b35d4555 | 8390 | decl = tsubst (decl, args, complain, in_decl); |
f8191e64 MM |
8391 | /* Prevent instantiate_decl from trying to instantiate |
8392 | this variable. We've already done all that needs to be | |
8393 | done. */ | |
8394 | DECL_TEMPLATE_INSTANTIATED (decl) = 1; | |
b35d4555 MM |
8395 | } |
8396 | else | |
8397 | decl = NULL_TREE; | |
1a6025b4 | 8398 | finish_handler_parms (decl, stmt); |
b35d4555 | 8399 | tsubst_expr (HANDLER_BODY (t), args, complain, in_decl); |
1a6025b4 | 8400 | finish_handler (stmt); |
b35d4555 | 8401 | } |
faf5394a MS |
8402 | break; |
8403 | ||
b87692e5 | 8404 | case TAG_DEFN: |
fd10dd09 | 8405 | tsubst (TREE_TYPE (t), args, complain, NULL_TREE); |
b87692e5 MS |
8406 | break; |
8407 | ||
5566b478 | 8408 | default: |
315fb5db | 8409 | gcc_assert (!STATEMENT_CODE_P (TREE_CODE (t))); |
c8094d83 | 8410 | |
315fb5db NS |
8411 | return tsubst_copy_and_build (t, args, complain, in_decl, |
8412 | /*function_p=*/false); | |
5566b478 | 8413 | } |
fd10dd09 | 8414 | |
325c3691 | 8415 | return NULL_TREE; |
8d08fdba MS |
8416 | } |
8417 | ||
b3445994 MM |
8418 | /* T is a postfix-expression that is not being used in a function |
8419 | call. Return the substituted version of T. */ | |
8420 | ||
8421 | static tree | |
c8094d83 | 8422 | tsubst_non_call_postfix_expression (tree t, tree args, |
b3445994 MM |
8423 | tsubst_flags_t complain, |
8424 | tree in_decl) | |
8425 | { | |
8426 | if (TREE_CODE (t) == SCOPE_REF) | |
8427 | t = tsubst_qualified_id (t, args, complain, in_decl, | |
8428 | /*done=*/false, /*address_p=*/false); | |
8429 | else | |
8430 | t = tsubst_copy_and_build (t, args, complain, in_decl, | |
8431 | /*function_p=*/false); | |
8432 | ||
8433 | return t; | |
8434 | } | |
8435 | ||
cc23546e | 8436 | /* Like tsubst but deals with expressions and performs semantic |
b3445994 | 8437 | analysis. FUNCTION_P is true if T is the "F" in "F (ARGS)". */ |
cc23546e | 8438 | |
ee76b931 | 8439 | tree |
c8094d83 | 8440 | tsubst_copy_and_build (tree t, |
0cbd7506 MS |
8441 | tree args, |
8442 | tsubst_flags_t complain, | |
8443 | tree in_decl, | |
b3445994 | 8444 | bool function_p) |
cc23546e | 8445 | { |
b3445994 MM |
8446 | #define RECUR(NODE) \ |
8447 | tsubst_copy_and_build (NODE, args, complain, in_decl, /*function_p=*/false) | |
8448 | ||
ee76b931 MM |
8449 | tree op1; |
8450 | ||
cc23546e JO |
8451 | if (t == NULL_TREE || t == error_mark_node) |
8452 | return t; | |
8453 | ||
8454 | switch (TREE_CODE (t)) | |
8455 | { | |
399dedb9 NS |
8456 | case USING_DECL: |
8457 | t = DECL_NAME (t); | |
852dcbdd | 8458 | /* Fall through. */ |
b3445994 | 8459 | case IDENTIFIER_NODE: |
cc23546e | 8460 | { |
b3445994 | 8461 | tree decl; |
b3445994 | 8462 | cp_id_kind idk; |
67c03833 | 8463 | bool non_integral_constant_expression_p; |
b3445994 MM |
8464 | const char *error_msg; |
8465 | ||
b3445994 | 8466 | if (IDENTIFIER_TYPENAME_P (t)) |
cc23546e | 8467 | { |
b3445994 MM |
8468 | tree new_type = tsubst (TREE_TYPE (t), args, complain, in_decl); |
8469 | t = mangle_conv_op_name_for_type (new_type); | |
cc23546e | 8470 | } |
b3445994 MM |
8471 | |
8472 | /* Look up the name. */ | |
10b1d5e7 | 8473 | decl = lookup_name (t, 0); |
b3445994 MM |
8474 | |
8475 | /* By convention, expressions use ERROR_MARK_NODE to indicate | |
8476 | failure, not NULL_TREE. */ | |
8477 | if (decl == NULL_TREE) | |
8478 | decl = error_mark_node; | |
8479 | ||
10b1d5e7 | 8480 | decl = finish_id_expression (t, decl, NULL_TREE, |
b3445994 | 8481 | &idk, |
67c03833 JM |
8482 | /*integral_constant_expression_p=*/false, |
8483 | /*allow_non_integral_constant_expression_p=*/false, | |
8484 | &non_integral_constant_expression_p, | |
02ed62dd MM |
8485 | /*template_p=*/false, |
8486 | /*done=*/true, | |
8487 | /*address_p=*/false, | |
8488 | /*template_arg_p=*/false, | |
b3445994 MM |
8489 | &error_msg); |
8490 | if (error_msg) | |
8491 | error (error_msg); | |
8492 | if (!function_p && TREE_CODE (decl) == IDENTIFIER_NODE) | |
8493 | decl = unqualified_name_lookup_error (decl); | |
8494 | return decl; | |
cc23546e JO |
8495 | } |
8496 | ||
8497 | case TEMPLATE_ID_EXPR: | |
8498 | { | |
8499 | tree object; | |
b3445994 | 8500 | tree template = RECUR (TREE_OPERAND (t, 0)); |
bf12d54d NS |
8501 | tree targs = TREE_OPERAND (t, 1); |
8502 | ||
8503 | if (targs) | |
8504 | targs = tsubst_template_args (targs, args, complain, in_decl); | |
c8094d83 | 8505 | |
cc23546e JO |
8506 | if (TREE_CODE (template) == COMPONENT_REF) |
8507 | { | |
8508 | object = TREE_OPERAND (template, 0); | |
8509 | template = TREE_OPERAND (template, 1); | |
8510 | } | |
8511 | else | |
8512 | object = NULL_TREE; | |
bd83b409 | 8513 | template = lookup_template_function (template, targs); |
c8094d83 | 8514 | |
cc23546e | 8515 | if (object) |
c8094d83 | 8516 | return build3 (COMPONENT_REF, TREE_TYPE (template), |
f293ce4b | 8517 | object, template, NULL_TREE); |
cc23546e JO |
8518 | else |
8519 | return template; | |
8520 | } | |
8521 | ||
8522 | case INDIRECT_REF: | |
db24eb1f NS |
8523 | { |
8524 | tree r = RECUR (TREE_OPERAND (t, 0)); | |
8525 | ||
8526 | if (REFERENCE_REF_P (t)) | |
8527 | { | |
e8c66fe0 NS |
8528 | /* A type conversion to reference type will be enclosed in |
8529 | such an indirect ref, but the substitution of the cast | |
8530 | will have also added such an indirect ref. */ | |
8531 | if (TREE_CODE (TREE_TYPE (r)) == REFERENCE_TYPE) | |
8532 | r = convert_from_reference (r); | |
db24eb1f NS |
8533 | } |
8534 | else | |
8535 | r = build_x_indirect_ref (r, "unary *"); | |
8536 | return r; | |
8537 | } | |
cc23546e | 8538 | |
0da99d4e GB |
8539 | case NOP_EXPR: |
8540 | return build_nop | |
8541 | (tsubst (TREE_TYPE (t), args, complain, in_decl), | |
8542 | RECUR (TREE_OPERAND (t, 0))); | |
8543 | ||
cc23546e JO |
8544 | case CAST_EXPR: |
8545 | return build_functional_cast | |
8546 | (tsubst (TREE_TYPE (t), args, complain, in_decl), | |
b3445994 | 8547 | RECUR (TREE_OPERAND (t, 0))); |
cc23546e JO |
8548 | |
8549 | case REINTERPRET_CAST_EXPR: | |
8550 | return build_reinterpret_cast | |
8551 | (tsubst (TREE_TYPE (t), args, complain, in_decl), | |
b3445994 | 8552 | RECUR (TREE_OPERAND (t, 0))); |
cc23546e JO |
8553 | |
8554 | case CONST_CAST_EXPR: | |
8555 | return build_const_cast | |
8556 | (tsubst (TREE_TYPE (t), args, complain, in_decl), | |
b3445994 | 8557 | RECUR (TREE_OPERAND (t, 0))); |
cc23546e JO |
8558 | |
8559 | case DYNAMIC_CAST_EXPR: | |
8560 | return build_dynamic_cast | |
8561 | (tsubst (TREE_TYPE (t), args, complain, in_decl), | |
b3445994 | 8562 | RECUR (TREE_OPERAND (t, 0))); |
cc23546e JO |
8563 | |
8564 | case STATIC_CAST_EXPR: | |
8565 | return build_static_cast | |
8566 | (tsubst (TREE_TYPE (t), args, complain, in_decl), | |
b3445994 | 8567 | RECUR (TREE_OPERAND (t, 0))); |
cc23546e | 8568 | |
cc23546e JO |
8569 | case POSTDECREMENT_EXPR: |
8570 | case POSTINCREMENT_EXPR: | |
b3445994 MM |
8571 | op1 = tsubst_non_call_postfix_expression (TREE_OPERAND (t, 0), |
8572 | args, complain, in_decl); | |
ee76b931 MM |
8573 | return build_x_unary_op (TREE_CODE (t), op1); |
8574 | ||
8575 | case PREDECREMENT_EXPR: | |
8576 | case PREINCREMENT_EXPR: | |
cc23546e JO |
8577 | case NEGATE_EXPR: |
8578 | case BIT_NOT_EXPR: | |
cc23546e | 8579 | case ABS_EXPR: |
d17811fd | 8580 | case TRUTH_NOT_EXPR: |
392e3d51 | 8581 | case UNARY_PLUS_EXPR: /* Unary + */ |
d17811fd MM |
8582 | case REALPART_EXPR: |
8583 | case IMAGPART_EXPR: | |
b3445994 | 8584 | return build_x_unary_op (TREE_CODE (t), RECUR (TREE_OPERAND (t, 0))); |
cc23546e | 8585 | |
cc23546e | 8586 | case ADDR_EXPR: |
ee76b931 MM |
8587 | op1 = TREE_OPERAND (t, 0); |
8588 | if (TREE_CODE (op1) == SCOPE_REF) | |
c8094d83 | 8589 | op1 = tsubst_qualified_id (op1, args, complain, in_decl, |
ee76b931 MM |
8590 | /*done=*/true, /*address_p=*/true); |
8591 | else | |
c8094d83 | 8592 | op1 = tsubst_non_call_postfix_expression (op1, args, complain, |
b3445994 | 8593 | in_decl); |
fc2b8477 MM |
8594 | if (TREE_CODE (op1) == LABEL_DECL) |
8595 | return finish_label_address_expr (DECL_NAME (op1)); | |
ee76b931 MM |
8596 | return build_x_unary_op (ADDR_EXPR, op1); |
8597 | ||
cc23546e JO |
8598 | case PLUS_EXPR: |
8599 | case MINUS_EXPR: | |
8600 | case MULT_EXPR: | |
8601 | case TRUNC_DIV_EXPR: | |
8602 | case CEIL_DIV_EXPR: | |
8603 | case FLOOR_DIV_EXPR: | |
8604 | case ROUND_DIV_EXPR: | |
8605 | case EXACT_DIV_EXPR: | |
8606 | case BIT_AND_EXPR: | |
cc23546e JO |
8607 | case BIT_IOR_EXPR: |
8608 | case BIT_XOR_EXPR: | |
8609 | case TRUNC_MOD_EXPR: | |
8610 | case FLOOR_MOD_EXPR: | |
8611 | case TRUTH_ANDIF_EXPR: | |
8612 | case TRUTH_ORIF_EXPR: | |
8613 | case TRUTH_AND_EXPR: | |
8614 | case TRUTH_OR_EXPR: | |
8615 | case RSHIFT_EXPR: | |
8616 | case LSHIFT_EXPR: | |
8617 | case RROTATE_EXPR: | |
8618 | case LROTATE_EXPR: | |
8619 | case EQ_EXPR: | |
8620 | case NE_EXPR: | |
8621 | case MAX_EXPR: | |
8622 | case MIN_EXPR: | |
8623 | case LE_EXPR: | |
8624 | case GE_EXPR: | |
8625 | case LT_EXPR: | |
8626 | case GT_EXPR: | |
8627 | case MEMBER_REF: | |
b3445994 | 8628 | case DOTSTAR_EXPR: |
cc23546e | 8629 | return build_x_binary_op |
c8094d83 | 8630 | (TREE_CODE (t), |
b3445994 | 8631 | RECUR (TREE_OPERAND (t, 0)), |
ec835fb2 MM |
8632 | RECUR (TREE_OPERAND (t, 1)), |
8633 | /*overloaded_p=*/NULL); | |
cc23546e JO |
8634 | |
8635 | case SCOPE_REF: | |
ee76b931 MM |
8636 | return tsubst_qualified_id (t, args, complain, in_decl, /*done=*/true, |
8637 | /*address_p=*/false); | |
cc23546e | 8638 | case ARRAY_REF: |
b3445994 MM |
8639 | op1 = tsubst_non_call_postfix_expression (TREE_OPERAND (t, 0), |
8640 | args, complain, in_decl); | |
d8987adb NS |
8641 | return build_x_binary_op (ARRAY_REF, op1, RECUR (TREE_OPERAND (t, 1)), |
8642 | /*overloaded_p=*/NULL); | |
c8094d83 | 8643 | |
cc23546e JO |
8644 | case SIZEOF_EXPR: |
8645 | case ALIGNOF_EXPR: | |
d17811fd MM |
8646 | op1 = TREE_OPERAND (t, 0); |
8647 | if (!args) | |
8648 | { | |
8649 | /* When there are no ARGS, we are trying to evaluate a | |
8650 | non-dependent expression from the parser. Trying to do | |
8651 | the substitutions may not work. */ | |
8652 | if (!TYPE_P (op1)) | |
8653 | op1 = TREE_TYPE (op1); | |
8654 | } | |
8655 | else | |
8656 | { | |
8657 | ++skip_evaluation; | |
b3445994 | 8658 | op1 = RECUR (op1); |
d17811fd MM |
8659 | --skip_evaluation; |
8660 | } | |
7a18b933 NS |
8661 | if (TYPE_P (op1)) |
8662 | return cxx_sizeof_or_alignof_type (op1, TREE_CODE (t), true); | |
d17811fd | 8663 | else |
7a18b933 | 8664 | return cxx_sizeof_or_alignof_expr (op1, TREE_CODE (t)); |
cc23546e JO |
8665 | |
8666 | case MODOP_EXPR: | |
e4c2c34b JM |
8667 | { |
8668 | tree r = build_x_modify_expr | |
8669 | (RECUR (TREE_OPERAND (t, 0)), | |
8670 | TREE_CODE (TREE_OPERAND (t, 1)), | |
8671 | RECUR (TREE_OPERAND (t, 2))); | |
bcf9a914 JM |
8672 | /* TREE_NO_WARNING must be set if either the expression was |
8673 | parenthesized or it uses an operator such as >>= rather | |
8674 | than plain assignment. In the former case, it was already | |
8675 | set and must be copied. In the latter case, | |
8676 | build_x_modify_expr sets it and it must not be reset | |
8677 | here. */ | |
8678 | if (TREE_NO_WARNING (t)) | |
8679 | TREE_NO_WARNING (r) = TREE_NO_WARNING (t); | |
e4c2c34b JM |
8680 | return r; |
8681 | } | |
cc23546e JO |
8682 | |
8683 | case ARROW_EXPR: | |
b3445994 MM |
8684 | op1 = tsubst_non_call_postfix_expression (TREE_OPERAND (t, 0), |
8685 | args, complain, in_decl); | |
ee76b931 MM |
8686 | /* Remember that there was a reference to this entity. */ |
8687 | if (DECL_P (op1)) | |
8688 | mark_used (op1); | |
8689 | return build_x_arrow (op1); | |
cc23546e JO |
8690 | |
8691 | case NEW_EXPR: | |
8692 | return build_new | |
b3445994 MM |
8693 | (RECUR (TREE_OPERAND (t, 0)), |
8694 | RECUR (TREE_OPERAND (t, 1)), | |
8695 | RECUR (TREE_OPERAND (t, 2)), | |
058b15c1 | 8696 | RECUR (TREE_OPERAND (t, 3)), |
cc23546e JO |
8697 | NEW_EXPR_USE_GLOBAL (t)); |
8698 | ||
8699 | case DELETE_EXPR: | |
8700 | return delete_sanity | |
b3445994 MM |
8701 | (RECUR (TREE_OPERAND (t, 0)), |
8702 | RECUR (TREE_OPERAND (t, 1)), | |
cc23546e JO |
8703 | DELETE_EXPR_USE_VEC (t), |
8704 | DELETE_EXPR_USE_GLOBAL (t)); | |
8705 | ||
8706 | case COMPOUND_EXPR: | |
b3445994 MM |
8707 | return build_x_compound_expr (RECUR (TREE_OPERAND (t, 0)), |
8708 | RECUR (TREE_OPERAND (t, 1))); | |
cc23546e | 8709 | |
ee76b931 | 8710 | case CALL_EXPR: |
cc23546e | 8711 | { |
ee76b931 MM |
8712 | tree function; |
8713 | tree call_args; | |
ee76b931 | 8714 | bool qualified_p; |
ee935db4 | 8715 | bool koenig_p; |
ee76b931 MM |
8716 | |
8717 | function = TREE_OPERAND (t, 0); | |
6d80c4b9 MM |
8718 | /* When we parsed the expression, we determined whether or |
8719 | not Koenig lookup should be performed. */ | |
8720 | koenig_p = KOENIG_LOOKUP_P (t); | |
ee76b931 | 8721 | if (TREE_CODE (function) == SCOPE_REF) |
cc23546e | 8722 | { |
ee76b931 MM |
8723 | qualified_p = true; |
8724 | function = tsubst_qualified_id (function, args, complain, in_decl, | |
c8094d83 | 8725 | /*done=*/false, |
ee76b931 | 8726 | /*address_p=*/false); |
cc23546e | 8727 | } |
ee76b931 | 8728 | else |
cc23546e | 8729 | { |
61e71a9e NS |
8730 | if (TREE_CODE (function) == COMPONENT_REF) |
8731 | { | |
8732 | tree op = TREE_OPERAND (function, 1); | |
8733 | ||
8734 | qualified_p = (TREE_CODE (op) == SCOPE_REF | |
8735 | || (BASELINK_P (op) | |
8736 | && BASELINK_QUALIFIED_P (op))); | |
8737 | } | |
8738 | else | |
8739 | qualified_p = false; | |
8740 | ||
c8094d83 | 8741 | function = tsubst_copy_and_build (function, args, complain, |
b3445994 MM |
8742 | in_decl, |
8743 | !qualified_p); | |
6d80c4b9 MM |
8744 | if (BASELINK_P (function)) |
8745 | qualified_p = true; | |
cc23546e | 8746 | } |
cc23546e | 8747 | |
b3445994 | 8748 | call_args = RECUR (TREE_OPERAND (t, 1)); |
676e33ca MM |
8749 | |
8750 | /* We do not perform argument-dependent lookup if normal | |
8751 | lookup finds a non-function, in accordance with the | |
8752 | expected resolution of DR 218. */ | |
ee935db4 | 8753 | if (koenig_p |
44370687 MM |
8754 | && ((is_overloaded_fn (function) |
8755 | /* If lookup found a member function, the Koenig lookup is | |
8756 | not appropriate, even if an unqualified-name was used | |
8757 | to denote the function. */ | |
8758 | && !DECL_FUNCTION_MEMBER_P (get_first_fn (function))) | |
b3445994 | 8759 | || TREE_CODE (function) == IDENTIFIER_NODE)) |
6d80c4b9 MM |
8760 | function = perform_koenig_lookup (function, call_args); |
8761 | ||
8762 | if (TREE_CODE (function) == IDENTIFIER_NODE) | |
b3445994 | 8763 | { |
6d80c4b9 MM |
8764 | unqualified_name_lookup_error (function); |
8765 | return error_mark_node; | |
b3445994 MM |
8766 | } |
8767 | ||
8768 | /* Remember that there was a reference to this entity. */ | |
8769 | if (DECL_P (function)) | |
8770 | mark_used (function); | |
8771 | ||
d17811fd MM |
8772 | if (TREE_CODE (function) == OFFSET_REF) |
8773 | return build_offset_ref_call_from_tree (function, call_args); | |
8774 | if (TREE_CODE (function) == COMPONENT_REF) | |
9f880ef9 MM |
8775 | { |
8776 | if (!BASELINK_P (TREE_OPERAND (function, 1))) | |
8777 | return finish_call_expr (function, call_args, | |
8778 | /*disallow_virtual=*/false, | |
8779 | /*koenig_p=*/false); | |
8780 | else | |
c8094d83 | 8781 | return (build_new_method_call |
9f880ef9 MM |
8782 | (TREE_OPERAND (function, 0), |
8783 | TREE_OPERAND (function, 1), | |
c8094d83 | 8784 | call_args, NULL_TREE, |
9f880ef9 MM |
8785 | qualified_p ? LOOKUP_NONVIRTUAL : LOOKUP_NORMAL)); |
8786 | } | |
c8094d83 | 8787 | return finish_call_expr (function, call_args, |
6d80c4b9 MM |
8788 | /*disallow_virtual=*/qualified_p, |
8789 | koenig_p); | |
cc23546e JO |
8790 | } |
8791 | ||
8792 | case COND_EXPR: | |
8793 | return build_x_conditional_expr | |
b3445994 MM |
8794 | (RECUR (TREE_OPERAND (t, 0)), |
8795 | RECUR (TREE_OPERAND (t, 1)), | |
8796 | RECUR (TREE_OPERAND (t, 2))); | |
cc23546e JO |
8797 | |
8798 | case PSEUDO_DTOR_EXPR: | |
c8094d83 | 8799 | return finish_pseudo_destructor_expr |
b3445994 MM |
8800 | (RECUR (TREE_OPERAND (t, 0)), |
8801 | RECUR (TREE_OPERAND (t, 1)), | |
8802 | RECUR (TREE_OPERAND (t, 2))); | |
cc23546e JO |
8803 | |
8804 | case TREE_LIST: | |
8805 | { | |
8806 | tree purpose, value, chain; | |
8807 | ||
8808 | if (t == void_list_node) | |
8809 | return t; | |
8810 | ||
8811 | purpose = TREE_PURPOSE (t); | |
8812 | if (purpose) | |
b3445994 | 8813 | purpose = RECUR (purpose); |
cc23546e JO |
8814 | value = TREE_VALUE (t); |
8815 | if (value) | |
b3445994 | 8816 | value = RECUR (value); |
cc23546e JO |
8817 | chain = TREE_CHAIN (t); |
8818 | if (chain && chain != void_type_node) | |
b3445994 | 8819 | chain = RECUR (chain); |
cc23546e JO |
8820 | if (purpose == TREE_PURPOSE (t) |
8821 | && value == TREE_VALUE (t) | |
8822 | && chain == TREE_CHAIN (t)) | |
8823 | return t; | |
8824 | return tree_cons (purpose, value, chain); | |
8825 | } | |
8826 | ||
8827 | case COMPONENT_REF: | |
8828 | { | |
ee76b931 MM |
8829 | tree object; |
8830 | tree member; | |
8831 | ||
b3445994 MM |
8832 | object = tsubst_non_call_postfix_expression (TREE_OPERAND (t, 0), |
8833 | args, complain, in_decl); | |
ee76b931 MM |
8834 | /* Remember that there was a reference to this entity. */ |
8835 | if (DECL_P (object)) | |
8836 | mark_used (object); | |
8837 | ||
8838 | member = TREE_OPERAND (t, 1); | |
8839 | if (BASELINK_P (member)) | |
c8094d83 | 8840 | member = tsubst_baselink (member, |
ee76b931 MM |
8841 | non_reference (TREE_TYPE (object)), |
8842 | args, complain, in_decl); | |
8843 | else | |
8844 | member = tsubst_copy (member, args, complain, in_decl); | |
cc23546e | 8845 | |
bad1f462 KL |
8846 | if (member == error_mark_node) |
8847 | return error_mark_node; | |
8848 | else if (!CLASS_TYPE_P (TREE_TYPE (object))) | |
cc23546e JO |
8849 | { |
8850 | if (TREE_CODE (member) == BIT_NOT_EXPR) | |
c8094d83 | 8851 | return finish_pseudo_destructor_expr (object, |
cc23546e JO |
8852 | NULL_TREE, |
8853 | TREE_TYPE (object)); | |
8854 | else if (TREE_CODE (member) == SCOPE_REF | |
8855 | && (TREE_CODE (TREE_OPERAND (member, 1)) == BIT_NOT_EXPR)) | |
c8094d83 | 8856 | return finish_pseudo_destructor_expr (object, |
cc23546e JO |
8857 | object, |
8858 | TREE_TYPE (object)); | |
8859 | } | |
8860 | else if (TREE_CODE (member) == SCOPE_REF | |
8861 | && TREE_CODE (TREE_OPERAND (member, 1)) == TEMPLATE_ID_EXPR) | |
8862 | { | |
8863 | tree tmpl; | |
8864 | tree args; | |
c8094d83 | 8865 | |
cc23546e JO |
8866 | /* Lookup the template functions now that we know what the |
8867 | scope is. */ | |
8868 | tmpl = TREE_OPERAND (TREE_OPERAND (member, 1), 0); | |
8869 | args = TREE_OPERAND (TREE_OPERAND (member, 1), 1); | |
c8094d83 | 8870 | member = lookup_qualified_name (TREE_OPERAND (member, 0), tmpl, |
12483c9f NS |
8871 | /*is_type_p=*/false, |
8872 | /*complain=*/false); | |
cc23546e | 8873 | if (BASELINK_P (member)) |
44370687 | 8874 | { |
c8094d83 | 8875 | BASELINK_FUNCTIONS (member) |
44370687 MM |
8876 | = build_nt (TEMPLATE_ID_EXPR, BASELINK_FUNCTIONS (member), |
8877 | args); | |
c8094d83 MS |
8878 | member = (adjust_result_of_qualified_name_lookup |
8879 | (member, BINFO_TYPE (BASELINK_BINFO (member)), | |
44370687 MM |
8880 | TREE_TYPE (object))); |
8881 | } | |
cc23546e JO |
8882 | else |
8883 | { | |
8f78f01f MM |
8884 | qualified_name_lookup_error (TREE_TYPE (object), tmpl, |
8885 | member); | |
cc23546e JO |
8886 | return error_mark_node; |
8887 | } | |
8888 | } | |
2436b51f MM |
8889 | else if (TREE_CODE (member) == SCOPE_REF |
8890 | && !CLASS_TYPE_P (TREE_OPERAND (member, 0)) | |
8891 | && TREE_CODE (TREE_OPERAND (member, 0)) != NAMESPACE_DECL) | |
8892 | { | |
8893 | if (complain & tf_error) | |
8894 | { | |
8895 | if (TYPE_P (TREE_OPERAND (member, 0))) | |
c8094d83 | 8896 | error ("%qT is not a class or namespace", |
2436b51f MM |
8897 | TREE_OPERAND (member, 0)); |
8898 | else | |
c8094d83 | 8899 | error ("%qD is not a class or namespace", |
2436b51f MM |
8900 | TREE_OPERAND (member, 0)); |
8901 | } | |
8902 | return error_mark_node; | |
8903 | } | |
a3f10e50 NS |
8904 | else if (TREE_CODE (member) == FIELD_DECL) |
8905 | return finish_non_static_data_member (member, object, NULL_TREE); | |
cc23546e | 8906 | |
02ed62dd MM |
8907 | return finish_class_member_access_expr (object, member, |
8908 | /*template_p=*/false); | |
cc23546e JO |
8909 | } |
8910 | ||
8911 | case THROW_EXPR: | |
8912 | return build_throw | |
b3445994 | 8913 | (RECUR (TREE_OPERAND (t, 0))); |
cc23546e JO |
8914 | |
8915 | case CONSTRUCTOR: | |
8916 | { | |
4038c495 GB |
8917 | VEC(constructor_elt,gc) *n; |
8918 | constructor_elt *ce; | |
8919 | unsigned HOST_WIDE_INT idx; | |
cc23546e | 8920 | tree r; |
cc23546e | 8921 | tree type = tsubst (TREE_TYPE (t), args, complain, in_decl); |
4038c495 | 8922 | bool process_index_p; |
cc23546e JO |
8923 | |
8924 | /* digest_init will do the wrong thing if we let it. */ | |
8925 | if (type && TYPE_PTRMEMFUNC_P (type)) | |
8926 | return t; | |
8927 | ||
4038c495 | 8928 | /* We do not want to process the index of aggregate |
cc23546e JO |
8929 | initializers as they are identifier nodes which will be |
8930 | looked up by digest_init. */ | |
4038c495 | 8931 | process_index_p = !(type && IS_AGGR_TYPE (type)); |
c8094d83 | 8932 | |
4038c495 GB |
8933 | n = VEC_copy (constructor_elt, gc, CONSTRUCTOR_ELTS (t)); |
8934 | for (idx = 0; VEC_iterate (constructor_elt, n, idx, ce); idx++) | |
8935 | { | |
8936 | if (ce->index && process_index_p) | |
8937 | ce->index = RECUR (ce->index); | |
8938 | ce->value = RECUR (ce->value); | |
cc23546e | 8939 | } |
c8094d83 | 8940 | |
4038c495 | 8941 | r = build_constructor (NULL_TREE, n); |
cc23546e JO |
8942 | TREE_HAS_CONSTRUCTOR (r) = TREE_HAS_CONSTRUCTOR (t); |
8943 | ||
8944 | if (type) | |
4038c495 | 8945 | return digest_init (type, r); |
cc23546e JO |
8946 | return r; |
8947 | } | |
8948 | ||
8949 | case TYPEID_EXPR: | |
8950 | { | |
b3445994 | 8951 | tree operand_0 = RECUR (TREE_OPERAND (t, 0)); |
cc23546e JO |
8952 | if (TYPE_P (operand_0)) |
8953 | return get_typeid (operand_0); | |
8954 | return build_typeid (operand_0); | |
8955 | } | |
8956 | ||
cc23546e | 8957 | case VAR_DECL: |
db24eb1f NS |
8958 | if (!args) |
8959 | return t; | |
8960 | /* Fall through */ | |
c8094d83 | 8961 | |
db24eb1f NS |
8962 | case PARM_DECL: |
8963 | { | |
8964 | tree r = tsubst_copy (t, args, complain, in_decl); | |
c8094d83 | 8965 | |
db24eb1f NS |
8966 | if (TREE_CODE (TREE_TYPE (t)) != REFERENCE_TYPE) |
8967 | /* If the original type was a reference, we'll be wrapped in | |
8968 | the appropriate INDIRECT_REF. */ | |
8969 | r = convert_from_reference (r); | |
8970 | return r; | |
8971 | } | |
cc23546e JO |
8972 | |
8973 | case VA_ARG_EXPR: | |
b3445994 | 8974 | return build_x_va_arg (RECUR (TREE_OPERAND (t, 0)), |
c8094d83 | 8975 | tsubst_copy (TREE_TYPE (t), args, complain, |
b3445994 | 8976 | in_decl)); |
cc23546e | 8977 | |
4bceb077 RH |
8978 | case OFFSETOF_EXPR: |
8979 | return fold_offsetof (RECUR (TREE_OPERAND (t, 0))); | |
8980 | ||
0fe0caa6 RH |
8981 | case STMT_EXPR: |
8982 | { | |
8983 | tree old_stmt_expr = cur_stmt_expr; | |
8984 | tree stmt_expr = begin_stmt_expr (); | |
8985 | ||
8986 | cur_stmt_expr = stmt_expr; | |
8987 | tsubst_expr (STMT_EXPR_STMT (t), args, complain, in_decl); | |
8988 | stmt_expr = finish_stmt_expr (stmt_expr, false); | |
8989 | cur_stmt_expr = old_stmt_expr; | |
8990 | ||
8991 | return stmt_expr; | |
8992 | } | |
8993 | ||
a5201a91 MM |
8994 | case CONST_DECL: |
8995 | t = tsubst_copy (t, args, complain, in_decl); | |
8996 | /* As in finish_id_expression, we resolve enumeration constants | |
8997 | to their underlying values. */ | |
8998 | if (TREE_CODE (t) == CONST_DECL) | |
8999 | return DECL_INITIAL (t); | |
9000 | return t; | |
9001 | ||
cc23546e | 9002 | default: |
e58a9aa1 ZL |
9003 | /* Handle Objective-C++ constructs, if appropriate. */ |
9004 | { | |
9005 | tree subst | |
9006 | = objcp_tsubst_copy_and_build (t, args, complain, | |
9007 | in_decl, /*function_p=*/false); | |
9008 | if (subst) | |
9009 | return subst; | |
9010 | } | |
cc23546e JO |
9011 | return tsubst_copy (t, args, complain, in_decl); |
9012 | } | |
b3445994 MM |
9013 | |
9014 | #undef RECUR | |
cc23546e JO |
9015 | } |
9016 | ||
3e4a3562 NS |
9017 | /* Verify that the instantiated ARGS are valid. For type arguments, |
9018 | make sure that the type's linkage is ok. For non-type arguments, | |
34cd5ae7 | 9019 | make sure they are constants if they are integral or enumerations. |
9bcb9aae | 9020 | Emit an error under control of COMPLAIN, and return TRUE on error. */ |
3e4a3562 NS |
9021 | |
9022 | static bool | |
3a978d72 | 9023 | check_instantiated_args (tree tmpl, tree args, tsubst_flags_t complain) |
3e4a3562 NS |
9024 | { |
9025 | int ix, len = DECL_NTPARMS (tmpl); | |
9026 | bool result = false; | |
9027 | ||
9028 | for (ix = 0; ix != len; ix++) | |
9029 | { | |
9030 | tree t = TREE_VEC_ELT (args, ix); | |
c8094d83 | 9031 | |
3e4a3562 NS |
9032 | if (TYPE_P (t)) |
9033 | { | |
9034 | /* [basic.link]: A name with no linkage (notably, the name | |
9035 | of a class or enumeration declared in a local scope) | |
9036 | shall not be used to declare an entity with linkage. | |
9037 | This implies that names with no linkage cannot be used as | |
9038 | template arguments. */ | |
4684cd27 | 9039 | tree nt = no_linkage_check (t, /*relaxed_p=*/false); |
3e4a3562 NS |
9040 | |
9041 | if (nt) | |
9042 | { | |
cb807ba3 | 9043 | /* DR 488 makes use of a type with no linkage cause |
2010cdcd MM |
9044 | type deduction to fail. */ |
9045 | if (complain & tf_error) | |
9046 | { | |
9047 | if (TYPE_ANONYMOUS_P (nt)) | |
9048 | error ("%qT is/uses anonymous type", t); | |
9049 | else | |
9050 | error ("%qT uses local type %qT", t, nt); | |
9051 | } | |
3e4a3562 NS |
9052 | result = true; |
9053 | } | |
9054 | /* In order to avoid all sorts of complications, we do not | |
9055 | allow variably-modified types as template arguments. */ | |
5377d5ba | 9056 | else if (variably_modified_type_p (t, NULL_TREE)) |
3e4a3562 NS |
9057 | { |
9058 | if (complain & tf_error) | |
0f51ccfc | 9059 | error ("%qT is a variably modified type", t); |
3e4a3562 NS |
9060 | result = true; |
9061 | } | |
9062 | } | |
9063 | /* A non-type argument of integral or enumerated type must be a | |
9064 | constant. */ | |
9065 | else if (TREE_TYPE (t) | |
9066 | && INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (t)) | |
9067 | && !TREE_CONSTANT (t)) | |
9068 | { | |
9069 | if (complain & tf_error) | |
0f51ccfc | 9070 | error ("integral expression %qE is not constant", t); |
3e4a3562 NS |
9071 | result = true; |
9072 | } | |
9073 | } | |
2010cdcd | 9074 | if (result && (complain & tf_error)) |
0f51ccfc | 9075 | error (" trying to instantiate %qD", tmpl); |
3e4a3562 NS |
9076 | return result; |
9077 | } | |
9078 | ||
6ba89f8e | 9079 | /* Instantiate the indicated variable or function template TMPL with |
36a117a5 MM |
9080 | the template arguments in TARG_PTR. */ |
9081 | ||
5566b478 | 9082 | tree |
3a978d72 | 9083 | instantiate_template (tree tmpl, tree targ_ptr, tsubst_flags_t complain) |
8d08fdba | 9084 | { |
5566b478 | 9085 | tree fndecl; |
36a117a5 MM |
9086 | tree gen_tmpl; |
9087 | tree spec; | |
5566b478 | 9088 | |
27fafc8d JM |
9089 | if (tmpl == error_mark_node) |
9090 | return error_mark_node; | |
9091 | ||
50bc768d | 9092 | gcc_assert (TREE_CODE (tmpl) == TEMPLATE_DECL); |
386b8a85 | 9093 | |
db9b2174 MM |
9094 | /* If this function is a clone, handle it specially. */ |
9095 | if (DECL_CLONED_FUNCTION_P (tmpl)) | |
3ad97789 | 9096 | { |
a30f62e0 | 9097 | tree spec; |
3ad97789 | 9098 | tree clone; |
c8094d83 | 9099 | |
a30f62e0 MM |
9100 | spec = instantiate_template (DECL_CLONED_FUNCTION (tmpl), targ_ptr, |
9101 | complain); | |
9102 | if (spec == error_mark_node) | |
9103 | return error_mark_node; | |
9104 | ||
c6002625 | 9105 | /* Look for the clone. */ |
4684cd27 | 9106 | FOR_EACH_CLONE (clone, spec) |
3ad97789 NS |
9107 | if (DECL_NAME (clone) == DECL_NAME (tmpl)) |
9108 | return clone; | |
9109 | /* We should always have found the clone by now. */ | |
315fb5db | 9110 | gcc_unreachable (); |
3ad97789 NS |
9111 | return NULL_TREE; |
9112 | } | |
c8094d83 | 9113 | |
36a117a5 | 9114 | /* Check to see if we already have this specialization. */ |
c8094d83 | 9115 | spec = retrieve_specialization (tmpl, targ_ptr, |
c7222c02 | 9116 | /*class_specializations_p=*/false); |
36a117a5 MM |
9117 | if (spec != NULL_TREE) |
9118 | return spec; | |
9119 | ||
f9a7ae04 MM |
9120 | gen_tmpl = most_general_template (tmpl); |
9121 | if (tmpl != gen_tmpl) | |
386b8a85 | 9122 | { |
36a117a5 MM |
9123 | /* The TMPL is a partial instantiation. To get a full set of |
9124 | arguments we must add the arguments used to perform the | |
9125 | partial instantiation. */ | |
9126 | targ_ptr = add_outermost_template_args (DECL_TI_ARGS (tmpl), | |
9127 | targ_ptr); | |
36a117a5 MM |
9128 | |
9129 | /* Check to see if we already have this specialization. */ | |
c7222c02 MM |
9130 | spec = retrieve_specialization (gen_tmpl, targ_ptr, |
9131 | /*class_specializations_p=*/false); | |
75650646 MM |
9132 | if (spec != NULL_TREE) |
9133 | return spec; | |
386b8a85 JM |
9134 | } |
9135 | ||
3e4a3562 NS |
9136 | if (check_instantiated_args (gen_tmpl, INNERMOST_TEMPLATE_ARGS (targ_ptr), |
9137 | complain)) | |
9138 | return error_mark_node; | |
c8094d83 | 9139 | |
2b907f5c KL |
9140 | /* We are building a FUNCTION_DECL, during which the access of its |
9141 | parameters and return types have to be checked. However this | |
9142 | FUNCTION_DECL which is the desired context for access checking | |
9143 | is not built yet. We solve this chicken-and-egg problem by | |
9144 | deferring all checks until we have the FUNCTION_DECL. */ | |
9145 | push_deferring_access_checks (dk_deferred); | |
5c74d5b0 | 9146 | |
f4f206f4 | 9147 | /* Substitute template parameters. */ |
17aec3eb | 9148 | fndecl = tsubst (DECL_TEMPLATE_RESULT (gen_tmpl), |
3e4a3562 | 9149 | targ_ptr, complain, gen_tmpl); |
5c74d5b0 | 9150 | |
2b907f5c KL |
9151 | /* Now we know the specialization, compute access previously |
9152 | deferred. */ | |
9153 | push_access_scope (fndecl); | |
9154 | perform_deferred_access_checks (); | |
9155 | pop_access_scope (fndecl); | |
9156 | pop_deferring_access_checks (); | |
5c74d5b0 | 9157 | |
36a117a5 MM |
9158 | /* The DECL_TI_TEMPLATE should always be the immediate parent |
9159 | template, not the most general template. */ | |
9160 | DECL_TI_TEMPLATE (fndecl) = tmpl; | |
8d08fdba | 9161 | |
94350948 | 9162 | /* If we've just instantiated the main entry point for a function, |
3ad97789 NS |
9163 | instantiate all the alternate entry points as well. We do this |
9164 | by cloning the instantiation of the main entry point, not by | |
9165 | instantiating the template clones. */ | |
9166 | if (TREE_CHAIN (gen_tmpl) && DECL_CLONED_FUNCTION_P (TREE_CHAIN (gen_tmpl))) | |
9167 | clone_function_decl (fndecl, /*update_method_vec_p=*/0); | |
94350948 | 9168 | |
5566b478 | 9169 | return fndecl; |
8d08fdba | 9170 | } |
5566b478 | 9171 | |
4393e105 MM |
9172 | /* The FN is a TEMPLATE_DECL for a function. The ARGS are the |
9173 | arguments that are being used when calling it. TARGS is a vector | |
c8094d83 | 9174 | into which the deduced template arguments are placed. |
8d08fdba MS |
9175 | |
9176 | Return zero for success, 2 for an incomplete match that doesn't resolve | |
9177 | all the types, and 1 for complete failure. An error message will be | |
9178 | printed only for an incomplete match. | |
9179 | ||
e5214479 JM |
9180 | If FN is a conversion operator, or we are trying to produce a specific |
9181 | specialization, RETURN_TYPE is the return type desired. | |
9f54c803 MM |
9182 | |
9183 | The EXPLICIT_TARGS are explicit template arguments provided via a | |
9184 | template-id. | |
6467930b | 9185 | |
830bfa74 MM |
9186 | The parameter STRICT is one of: |
9187 | ||
c8094d83 | 9188 | DEDUCE_CALL: |
830bfa74 MM |
9189 | We are deducing arguments for a function call, as in |
9190 | [temp.deduct.call]. | |
9191 | ||
9192 | DEDUCE_CONV: | |
c8094d83 | 9193 | We are deducing arguments for a conversion function, as in |
830bfa74 MM |
9194 | [temp.deduct.conv]. |
9195 | ||
9196 | DEDUCE_EXACT: | |
62e4a758 NS |
9197 | We are deducing arguments when doing an explicit instantiation |
9198 | as in [temp.explicit], when determining an explicit specialization | |
9199 | as in [temp.expl.spec], or when taking the address of a function | |
a34d3336 | 9200 | template, as in [temp.deduct.funcaddr]. */ |
8d08fdba MS |
9201 | |
9202 | int | |
c8094d83 | 9203 | fn_type_unification (tree fn, |
0cbd7506 MS |
9204 | tree explicit_targs, |
9205 | tree targs, | |
9206 | tree args, | |
9207 | tree return_type, | |
30f86ec3 FJ |
9208 | unification_kind_t strict, |
9209 | int flags) | |
386b8a85 | 9210 | { |
4393e105 MM |
9211 | tree parms; |
9212 | tree fntype; | |
adecb3f4 | 9213 | int result; |
386b8a85 | 9214 | |
50bc768d | 9215 | gcc_assert (TREE_CODE (fn) == TEMPLATE_DECL); |
2b59fc25 | 9216 | |
4393e105 MM |
9217 | fntype = TREE_TYPE (fn); |
9218 | if (explicit_targs) | |
75650646 | 9219 | { |
4393e105 | 9220 | /* [temp.deduct] |
c8094d83 | 9221 | |
4393e105 MM |
9222 | The specified template arguments must match the template |
9223 | parameters in kind (i.e., type, nontype, template), and there | |
9224 | must not be more arguments than there are parameters; | |
9225 | otherwise type deduction fails. | |
9226 | ||
9227 | Nontype arguments must match the types of the corresponding | |
9228 | nontype template parameters, or must be convertible to the | |
9229 | types of the corresponding nontype parameters as specified in | |
9230 | _temp.arg.nontype_, otherwise type deduction fails. | |
9231 | ||
9232 | All references in the function type of the function template | |
9233 | to the corresponding template parameters are replaced by the | |
9234 | specified template argument values. If a substitution in a | |
9235 | template parameter or in the function type of the function | |
9236 | template results in an invalid type, type deduction fails. */ | |
9237 | int i; | |
9238 | tree converted_args; | |
ffd49b19 | 9239 | bool incomplete; |
75650646 | 9240 | |
c8a7ed43 AO |
9241 | if (explicit_targs == error_mark_node) |
9242 | return 1; | |
9243 | ||
4393e105 | 9244 | converted_args |
c8094d83 MS |
9245 | = (coerce_template_parms (DECL_INNERMOST_TEMPLATE_PARMS (fn), |
9246 | explicit_targs, NULL_TREE, tf_none, | |
4393e105 MM |
9247 | /*require_all_arguments=*/0)); |
9248 | if (converted_args == error_mark_node) | |
75650646 | 9249 | return 1; |
386b8a85 | 9250 | |
ffd49b19 | 9251 | /* Substitute the explicit args into the function type. This is |
0cbd7506 MS |
9252 | necessary so that, for instance, explicitly declared function |
9253 | arguments can match null pointed constants. If we were given | |
9254 | an incomplete set of explicit args, we must not do semantic | |
9255 | processing during substitution as we could create partial | |
9256 | instantiations. */ | |
ffd49b19 NS |
9257 | incomplete = NUM_TMPL_ARGS (explicit_targs) != NUM_TMPL_ARGS (targs); |
9258 | processing_template_decl += incomplete; | |
c2ea3a40 | 9259 | fntype = tsubst (fntype, converted_args, tf_none, NULL_TREE); |
ffd49b19 | 9260 | processing_template_decl -= incomplete; |
c8094d83 | 9261 | |
4393e105 MM |
9262 | if (fntype == error_mark_node) |
9263 | return 1; | |
050367a3 | 9264 | |
4393e105 | 9265 | /* Place the explicitly specified arguments in TARGS. */ |
ffd49b19 | 9266 | for (i = NUM_TMPL_ARGS (converted_args); i--;) |
4393e105 | 9267 | TREE_VEC_ELT (targs, i) = TREE_VEC_ELT (converted_args, i); |
75650646 | 9268 | } |
c8094d83 | 9269 | |
4393e105 | 9270 | parms = TYPE_ARG_TYPES (fntype); |
e5214479 JM |
9271 | /* Never do unification on the 'this' parameter. */ |
9272 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fn)) | |
9273 | parms = TREE_CHAIN (parms); | |
c8094d83 | 9274 | |
8d3631f8 NS |
9275 | if (return_type) |
9276 | { | |
8d3631f8 NS |
9277 | parms = tree_cons (NULL_TREE, TREE_TYPE (fntype), parms); |
9278 | args = tree_cons (NULL_TREE, return_type, args); | |
4393e105 MM |
9279 | } |
9280 | ||
4393e105 MM |
9281 | /* We allow incomplete unification without an error message here |
9282 | because the standard doesn't seem to explicitly prohibit it. Our | |
9283 | callers must be ready to deal with unification failures in any | |
9284 | event. */ | |
c8094d83 | 9285 | result = type_unification_real (DECL_INNERMOST_TEMPLATE_PARMS (fn), |
adecb3f4 | 9286 | targs, parms, args, /*subr=*/0, |
30f86ec3 | 9287 | strict, flags); |
adecb3f4 | 9288 | |
c8094d83 | 9289 | if (result == 0) |
adecb3f4 | 9290 | /* All is well so far. Now, check: |
c8094d83 MS |
9291 | |
9292 | [temp.deduct] | |
9293 | ||
adecb3f4 MM |
9294 | When all template arguments have been deduced, all uses of |
9295 | template parameters in nondeduced contexts are replaced with | |
9296 | the corresponding deduced argument values. If the | |
9297 | substitution results in an invalid type, as described above, | |
9298 | type deduction fails. */ | |
c2ea3a40 | 9299 | if (tsubst (TREE_TYPE (fn), targs, tf_none, NULL_TREE) |
adecb3f4 MM |
9300 | == error_mark_node) |
9301 | return 1; | |
9302 | ||
9303 | return result; | |
830bfa74 MM |
9304 | } |
9305 | ||
9306 | /* Adjust types before performing type deduction, as described in | |
9307 | [temp.deduct.call] and [temp.deduct.conv]. The rules in these two | |
4c7d0dff MM |
9308 | sections are symmetric. PARM is the type of a function parameter |
9309 | or the return type of the conversion function. ARG is the type of | |
9310 | the argument passed to the call, or the type of the value | |
dc957d14 | 9311 | initialized with the result of the conversion function. */ |
386b8a85 | 9312 | |
62e4a758 | 9313 | static int |
c8094d83 | 9314 | maybe_adjust_types_for_deduction (unification_kind_t strict, |
0cbd7506 MS |
9315 | tree* parm, |
9316 | tree* arg) | |
830bfa74 | 9317 | { |
62e4a758 | 9318 | int result = 0; |
c8094d83 | 9319 | |
830bfa74 MM |
9320 | switch (strict) |
9321 | { | |
9322 | case DEDUCE_CALL: | |
9323 | break; | |
9324 | ||
9325 | case DEDUCE_CONV: | |
9326 | { | |
4c7d0dff MM |
9327 | /* Swap PARM and ARG throughout the remainder of this |
9328 | function; the handling is precisely symmetric since PARM | |
9329 | will initialize ARG rather than vice versa. */ | |
830bfa74 MM |
9330 | tree* temp = parm; |
9331 | parm = arg; | |
9332 | arg = temp; | |
9333 | break; | |
9334 | } | |
9335 | ||
9336 | case DEDUCE_EXACT: | |
9337 | /* There is nothing to do in this case. */ | |
62e4a758 | 9338 | return 0; |
830bfa74 MM |
9339 | |
9340 | default: | |
315fb5db | 9341 | gcc_unreachable (); |
830bfa74 MM |
9342 | } |
9343 | ||
9344 | if (TREE_CODE (*parm) != REFERENCE_TYPE) | |
9345 | { | |
9346 | /* [temp.deduct.call] | |
c8094d83 | 9347 | |
830bfa74 | 9348 | If P is not a reference type: |
c8094d83 | 9349 | |
830bfa74 MM |
9350 | --If A is an array type, the pointer type produced by the |
9351 | array-to-pointer standard conversion (_conv.array_) is | |
9352 | used in place of A for type deduction; otherwise, | |
c8094d83 | 9353 | |
830bfa74 MM |
9354 | --If A is a function type, the pointer type produced by |
9355 | the function-to-pointer standard conversion | |
9356 | (_conv.func_) is used in place of A for type deduction; | |
9357 | otherwise, | |
c8094d83 | 9358 | |
830bfa74 MM |
9359 | --If A is a cv-qualified type, the top level |
9360 | cv-qualifiers of A's type are ignored for type | |
9361 | deduction. */ | |
9362 | if (TREE_CODE (*arg) == ARRAY_TYPE) | |
9363 | *arg = build_pointer_type (TREE_TYPE (*arg)); | |
d8f8dca1 | 9364 | else if (TREE_CODE (*arg) == FUNCTION_TYPE) |
830bfa74 MM |
9365 | *arg = build_pointer_type (*arg); |
9366 | else | |
9367 | *arg = TYPE_MAIN_VARIANT (*arg); | |
9368 | } | |
c8094d83 | 9369 | |
830bfa74 | 9370 | /* [temp.deduct.call] |
c8094d83 | 9371 | |
830bfa74 MM |
9372 | If P is a cv-qualified type, the top level cv-qualifiers |
9373 | of P's type are ignored for type deduction. If P is a | |
9374 | reference type, the type referred to by P is used for | |
9375 | type deduction. */ | |
9376 | *parm = TYPE_MAIN_VARIANT (*parm); | |
9377 | if (TREE_CODE (*parm) == REFERENCE_TYPE) | |
62e4a758 NS |
9378 | { |
9379 | *parm = TREE_TYPE (*parm); | |
9380 | result |= UNIFY_ALLOW_OUTER_MORE_CV_QUAL; | |
9381 | } | |
1c82cc90 NS |
9382 | |
9383 | /* DR 322. For conversion deduction, remove a reference type on parm | |
9384 | too (which has been swapped into ARG). */ | |
9385 | if (strict == DEDUCE_CONV && TREE_CODE (*arg) == REFERENCE_TYPE) | |
9386 | *arg = TREE_TYPE (*arg); | |
c8094d83 | 9387 | |
62e4a758 | 9388 | return result; |
386b8a85 JM |
9389 | } |
9390 | ||
e5214479 | 9391 | /* Most parms like fn_type_unification. |
9f54c803 MM |
9392 | |
9393 | If SUBR is 1, we're being called recursively (to unify the | |
9394 | arguments of a function or method parameter of a function | |
38d18b1a | 9395 | template). */ |
386b8a85 | 9396 | |
4966381a | 9397 | static int |
c8094d83 | 9398 | type_unification_real (tree tparms, |
0cbd7506 MS |
9399 | tree targs, |
9400 | tree xparms, | |
9401 | tree xargs, | |
9402 | int subr, | |
30f86ec3 FJ |
9403 | unification_kind_t strict, |
9404 | int flags) | |
8d08fdba MS |
9405 | { |
9406 | tree parm, arg; | |
9407 | int i; | |
9408 | int ntparms = TREE_VEC_LENGTH (tparms); | |
830bfa74 | 9409 | int sub_strict; |
bd0d5d4a JM |
9410 | int saw_undeduced = 0; |
9411 | tree parms, args; | |
8d08fdba | 9412 | |
50bc768d NS |
9413 | gcc_assert (TREE_CODE (tparms) == TREE_VEC); |
9414 | gcc_assert (xparms == NULL_TREE || TREE_CODE (xparms) == TREE_LIST); | |
9415 | gcc_assert (!xargs || TREE_CODE (xargs) == TREE_LIST); | |
9416 | gcc_assert (ntparms > 0); | |
8d08fdba | 9417 | |
830bfa74 MM |
9418 | switch (strict) |
9419 | { | |
9420 | case DEDUCE_CALL: | |
028d1f20 | 9421 | sub_strict = (UNIFY_ALLOW_OUTER_LEVEL | UNIFY_ALLOW_MORE_CV_QUAL |
0cbd7506 | 9422 | | UNIFY_ALLOW_DERIVED); |
830bfa74 | 9423 | break; |
c8094d83 | 9424 | |
830bfa74 MM |
9425 | case DEDUCE_CONV: |
9426 | sub_strict = UNIFY_ALLOW_LESS_CV_QUAL; | |
9427 | break; | |
9428 | ||
9429 | case DEDUCE_EXACT: | |
9430 | sub_strict = UNIFY_ALLOW_NONE; | |
9431 | break; | |
c8094d83 | 9432 | |
830bfa74 | 9433 | default: |
315fb5db | 9434 | gcc_unreachable (); |
830bfa74 MM |
9435 | } |
9436 | ||
bd0d5d4a JM |
9437 | again: |
9438 | parms = xparms; | |
9439 | args = xargs; | |
bd0d5d4a | 9440 | |
a34d3336 NS |
9441 | while (parms && parms != void_list_node |
9442 | && args && args != void_list_node) | |
8d08fdba MS |
9443 | { |
9444 | parm = TREE_VALUE (parms); | |
9445 | parms = TREE_CHAIN (parms); | |
9446 | arg = TREE_VALUE (args); | |
9447 | args = TREE_CHAIN (args); | |
9448 | ||
9449 | if (arg == error_mark_node) | |
9450 | return 1; | |
9451 | if (arg == unknown_type_node) | |
34016c81 JM |
9452 | /* We can't deduce anything from this, but we might get all the |
9453 | template args from other function args. */ | |
9454 | continue; | |
b7484fbe | 9455 | |
03e70705 JM |
9456 | /* Conversions will be performed on a function argument that |
9457 | corresponds with a function parameter that contains only | |
9458 | non-deducible template parameters and explicitly specified | |
9459 | template parameters. */ | |
c353b8e3 | 9460 | if (!uses_template_parms (parm)) |
b7484fbe | 9461 | { |
03e70705 JM |
9462 | tree type; |
9463 | ||
2f939d94 | 9464 | if (!TYPE_P (arg)) |
03e70705 JM |
9465 | type = TREE_TYPE (arg); |
9466 | else | |
c353b8e3 | 9467 | type = arg; |
03e70705 | 9468 | |
fad86f7a | 9469 | if (same_type_p (parm, type)) |
343c89cd | 9470 | continue; |
fad86f7a | 9471 | if (strict != DEDUCE_EXACT |
30f86ec3 FJ |
9472 | && can_convert_arg (parm, type, TYPE_P (arg) ? NULL_TREE : arg, |
9473 | flags)) | |
fad86f7a GK |
9474 | continue; |
9475 | ||
b7484fbe MS |
9476 | return 1; |
9477 | } | |
c8094d83 | 9478 | |
2f939d94 | 9479 | if (!TYPE_P (arg)) |
8d08fdba | 9480 | { |
50bc768d | 9481 | gcc_assert (TREE_TYPE (arg) != NULL_TREE); |
34016c81 | 9482 | if (type_unknown_p (arg)) |
28cbf42c | 9483 | { |
34016c81 JM |
9484 | /* [temp.deduct.type] A template-argument can be deduced from |
9485 | a pointer to function or pointer to member function | |
9486 | argument if the set of overloaded functions does not | |
9487 | contain function templates and at most one of a set of | |
9488 | overloaded functions provides a unique match. */ | |
9489 | ||
9490 | if (resolve_overloaded_unification | |
4393e105 | 9491 | (tparms, targs, parm, arg, strict, sub_strict) |
34016c81 JM |
9492 | != 0) |
9493 | return 1; | |
9494 | continue; | |
28cbf42c | 9495 | } |
8d08fdba | 9496 | arg = TREE_TYPE (arg); |
08476342 NS |
9497 | if (arg == error_mark_node) |
9498 | return 1; | |
8d08fdba | 9499 | } |
c8094d83 | 9500 | |
62e4a758 | 9501 | { |
0cbd7506 | 9502 | int arg_strict = sub_strict; |
c8094d83 | 9503 | |
0cbd7506 | 9504 | if (!subr) |
62e4a758 | 9505 | arg_strict |= maybe_adjust_types_for_deduction (strict, &parm, &arg); |
4393e105 | 9506 | |
0cbd7506 MS |
9507 | if (unify (tparms, targs, parm, arg, arg_strict)) |
9508 | return 1; | |
62e4a758 | 9509 | } |
8d08fdba | 9510 | } |
c8094d83 | 9511 | |
8d08fdba MS |
9512 | /* Fail if we've reached the end of the parm list, and more args |
9513 | are present, and the parm list isn't variadic. */ | |
9514 | if (args && args != void_list_node && parms == void_list_node) | |
9515 | return 1; | |
f4f206f4 | 9516 | /* Fail if parms are left and they don't have default values. */ |
a34d3336 | 9517 | if (parms && parms != void_list_node |
8d08fdba MS |
9518 | && TREE_PURPOSE (parms) == NULL_TREE) |
9519 | return 1; | |
bd0d5d4a | 9520 | |
8d08fdba MS |
9521 | if (!subr) |
9522 | for (i = 0; i < ntparms; i++) | |
a34d3336 | 9523 | if (!TREE_VEC_ELT (targs, i)) |
8d08fdba | 9524 | { |
bd0d5d4a JM |
9525 | tree tparm = TREE_VALUE (TREE_VEC_ELT (tparms, i)); |
9526 | ||
9527 | /* If this is an undeduced nontype parameter that depends on | |
9528 | a type parameter, try another pass; its type may have been | |
9529 | deduced from a later argument than the one from which | |
9530 | this parameter can be deduced. */ | |
9531 | if (TREE_CODE (tparm) == PARM_DECL | |
9532 | && uses_template_parms (TREE_TYPE (tparm)) | |
9533 | && !saw_undeduced++) | |
9534 | goto again; | |
9535 | ||
8d08fdba MS |
9536 | return 2; |
9537 | } | |
c8094d83 | 9538 | |
8d08fdba MS |
9539 | return 0; |
9540 | } | |
9541 | ||
34016c81 JM |
9542 | /* Subroutine of type_unification_real. Args are like the variables at the |
9543 | call site. ARG is an overloaded function (or template-id); we try | |
9544 | deducing template args from each of the overloads, and if only one | |
9545 | succeeds, we go with that. Modifies TARGS and returns 0 on success. */ | |
9546 | ||
9547 | static int | |
c8094d83 | 9548 | resolve_overloaded_unification (tree tparms, |
0cbd7506 MS |
9549 | tree targs, |
9550 | tree parm, | |
9551 | tree arg, | |
9552 | unification_kind_t strict, | |
3a978d72 | 9553 | int sub_strict) |
34016c81 JM |
9554 | { |
9555 | tree tempargs = copy_node (targs); | |
9556 | int good = 0; | |
f23fb7f5 | 9557 | bool addr_p; |
34016c81 JM |
9558 | |
9559 | if (TREE_CODE (arg) == ADDR_EXPR) | |
f23fb7f5 MM |
9560 | { |
9561 | arg = TREE_OPERAND (arg, 0); | |
9562 | addr_p = true; | |
9563 | } | |
9564 | else | |
9565 | addr_p = false; | |
9f3d9e46 | 9566 | |
d8f8dca1 MM |
9567 | if (TREE_CODE (arg) == COMPONENT_REF) |
9568 | /* Handle `&x' where `x' is some static or non-static member | |
9569 | function name. */ | |
9570 | arg = TREE_OPERAND (arg, 1); | |
9571 | ||
05e0b2f4 JM |
9572 | if (TREE_CODE (arg) == OFFSET_REF) |
9573 | arg = TREE_OPERAND (arg, 1); | |
9574 | ||
9f3d9e46 | 9575 | /* Strip baselink information. */ |
50ad9642 MM |
9576 | if (BASELINK_P (arg)) |
9577 | arg = BASELINK_FUNCTIONS (arg); | |
9f3d9e46 | 9578 | |
34016c81 JM |
9579 | if (TREE_CODE (arg) == TEMPLATE_ID_EXPR) |
9580 | { | |
9581 | /* If we got some explicit template args, we need to plug them into | |
9582 | the affected templates before we try to unify, in case the | |
9583 | explicit args will completely resolve the templates in question. */ | |
9584 | ||
9585 | tree expl_subargs = TREE_OPERAND (arg, 1); | |
9586 | arg = TREE_OPERAND (arg, 0); | |
9587 | ||
9588 | for (; arg; arg = OVL_NEXT (arg)) | |
9589 | { | |
9590 | tree fn = OVL_CURRENT (arg); | |
9591 | tree subargs, elem; | |
9592 | ||
9593 | if (TREE_CODE (fn) != TEMPLATE_DECL) | |
9594 | continue; | |
9595 | ||
a34d3336 NS |
9596 | subargs = get_bindings (fn, DECL_TEMPLATE_RESULT (fn), |
9597 | expl_subargs, /*check_ret=*/false); | |
34016c81 JM |
9598 | if (subargs) |
9599 | { | |
c2ea3a40 | 9600 | elem = tsubst (TREE_TYPE (fn), subargs, tf_none, NULL_TREE); |
c8094d83 | 9601 | good += try_one_overload (tparms, targs, tempargs, parm, |
f23fb7f5 | 9602 | elem, strict, sub_strict, addr_p); |
34016c81 JM |
9603 | } |
9604 | } | |
9605 | } | |
315fb5db | 9606 | else |
34016c81 | 9607 | { |
315fb5db NS |
9608 | gcc_assert (TREE_CODE (arg) == OVERLOAD |
9609 | || TREE_CODE (arg) == FUNCTION_DECL); | |
c8094d83 | 9610 | |
34016c81 | 9611 | for (; arg; arg = OVL_NEXT (arg)) |
f23fb7f5 MM |
9612 | good += try_one_overload (tparms, targs, tempargs, parm, |
9613 | TREE_TYPE (OVL_CURRENT (arg)), | |
9614 | strict, sub_strict, addr_p); | |
34016c81 | 9615 | } |
34016c81 JM |
9616 | |
9617 | /* [temp.deduct.type] A template-argument can be deduced from a pointer | |
9618 | to function or pointer to member function argument if the set of | |
9619 | overloaded functions does not contain function templates and at most | |
9620 | one of a set of overloaded functions provides a unique match. | |
9621 | ||
9622 | So if we found multiple possibilities, we return success but don't | |
9623 | deduce anything. */ | |
9624 | ||
9625 | if (good == 1) | |
9626 | { | |
9627 | int i = TREE_VEC_LENGTH (targs); | |
9628 | for (; i--; ) | |
9629 | if (TREE_VEC_ELT (tempargs, i)) | |
9630 | TREE_VEC_ELT (targs, i) = TREE_VEC_ELT (tempargs, i); | |
9631 | } | |
9632 | if (good) | |
9633 | return 0; | |
9634 | ||
9635 | return 1; | |
9636 | } | |
9637 | ||
9638 | /* Subroutine of resolve_overloaded_unification; does deduction for a single | |
9639 | overload. Fills TARGS with any deduced arguments, or error_mark_node if | |
9640 | different overloads deduce different arguments for a given parm. | |
f23fb7f5 MM |
9641 | ADDR_P is true if the expression for which deduction is being |
9642 | performed was of the form "& fn" rather than simply "fn". | |
9643 | ||
34016c81 JM |
9644 | Returns 1 on success. */ |
9645 | ||
9646 | static int | |
3a978d72 | 9647 | try_one_overload (tree tparms, |
0cbd7506 MS |
9648 | tree orig_targs, |
9649 | tree targs, | |
9650 | tree parm, | |
9651 | tree arg, | |
9652 | unification_kind_t strict, | |
f23fb7f5 MM |
9653 | int sub_strict, |
9654 | bool addr_p) | |
34016c81 JM |
9655 | { |
9656 | int nargs; | |
9657 | tree tempargs; | |
9658 | int i; | |
9659 | ||
9660 | /* [temp.deduct.type] A template-argument can be deduced from a pointer | |
9661 | to function or pointer to member function argument if the set of | |
9662 | overloaded functions does not contain function templates and at most | |
9663 | one of a set of overloaded functions provides a unique match. | |
9664 | ||
9665 | So if this is a template, just return success. */ | |
9666 | ||
9667 | if (uses_template_parms (arg)) | |
9668 | return 1; | |
9669 | ||
f23fb7f5 MM |
9670 | if (TREE_CODE (arg) == METHOD_TYPE) |
9671 | arg = build_ptrmemfunc_type (build_pointer_type (arg)); | |
9672 | else if (addr_p) | |
9673 | arg = build_pointer_type (arg); | |
9674 | ||
62e4a758 | 9675 | sub_strict |= maybe_adjust_types_for_deduction (strict, &parm, &arg); |
34016c81 JM |
9676 | |
9677 | /* We don't copy orig_targs for this because if we have already deduced | |
9678 | some template args from previous args, unify would complain when we | |
9679 | try to deduce a template parameter for the same argument, even though | |
9680 | there isn't really a conflict. */ | |
9681 | nargs = TREE_VEC_LENGTH (targs); | |
f31c0a32 | 9682 | tempargs = make_tree_vec (nargs); |
34016c81 | 9683 | |
4393e105 | 9684 | if (unify (tparms, tempargs, parm, arg, sub_strict) != 0) |
34016c81 JM |
9685 | return 0; |
9686 | ||
9687 | /* First make sure we didn't deduce anything that conflicts with | |
e97e5263 | 9688 | explicitly specified args. */ |
34016c81 JM |
9689 | for (i = nargs; i--; ) |
9690 | { | |
9691 | tree elt = TREE_VEC_ELT (tempargs, i); | |
e97e5263 | 9692 | tree oldelt = TREE_VEC_ELT (orig_targs, i); |
34016c81 | 9693 | |
a34d3336 NS |
9694 | if (!elt) |
9695 | /*NOP*/; | |
34016c81 | 9696 | else if (uses_template_parms (elt)) |
a34d3336 NS |
9697 | /* Since we're unifying against ourselves, we will fill in |
9698 | template args used in the function parm list with our own | |
9699 | template parms. Discard them. */ | |
9700 | TREE_VEC_ELT (tempargs, i) = NULL_TREE; | |
9701 | else if (oldelt && !template_args_equal (oldelt, elt)) | |
34016c81 JM |
9702 | return 0; |
9703 | } | |
9704 | ||
9705 | for (i = nargs; i--; ) | |
9706 | { | |
9707 | tree elt = TREE_VEC_ELT (tempargs, i); | |
9708 | ||
9709 | if (elt) | |
9710 | TREE_VEC_ELT (targs, i) = elt; | |
9711 | } | |
9712 | ||
9713 | return 1; | |
9714 | } | |
9715 | ||
74601d7c KL |
9716 | /* Verify that nondeduce template argument agrees with the type |
9717 | obtained from argument deduction. Return nonzero if the | |
9718 | verification fails. | |
9719 | ||
9720 | For example: | |
9721 | ||
9722 | struct A { typedef int X; }; | |
9723 | template <class T, class U> struct C {}; | |
9724 | template <class T> struct C<T, typename T::X> {}; | |
9725 | ||
9726 | Then with the instantiation `C<A, int>', we can deduce that | |
9727 | `T' is `A' but unify () does not check whether `typename T::X' | |
9728 | is `int'. This function ensure that they agree. | |
9729 | ||
9730 | TARGS, PARMS are the same as the arguments of unify. | |
9731 | ARGS contains template arguments from all levels. */ | |
9732 | ||
9733 | static int | |
3a978d72 | 9734 | verify_class_unification (tree targs, tree parms, tree args) |
74601d7c | 9735 | { |
e2005c8d | 9736 | parms = tsubst (parms, add_outermost_template_args (args, targs), |
0cbd7506 | 9737 | tf_none, NULL_TREE); |
e2005c8d | 9738 | if (parms == error_mark_node) |
74601d7c KL |
9739 | return 1; |
9740 | ||
e2005c8d | 9741 | return !comp_template_args (parms, INNERMOST_TEMPLATE_ARGS (args)); |
74601d7c KL |
9742 | } |
9743 | ||
4393e105 MM |
9744 | /* PARM is a template class (perhaps with unbound template |
9745 | parameters). ARG is a fully instantiated type. If ARG can be | |
9746 | bound to PARM, return ARG, otherwise return NULL_TREE. TPARMS and | |
9747 | TARGS are as for unify. */ | |
fcfb9f96 MM |
9748 | |
9749 | static tree | |
3a978d72 | 9750 | try_class_unification (tree tparms, tree targs, tree parm, tree arg) |
4393e105 | 9751 | { |
4393e105 MM |
9752 | tree copy_of_targs; |
9753 | ||
9754 | if (!CLASSTYPE_TEMPLATE_INFO (arg) | |
c8094d83 | 9755 | || (most_general_template (CLASSTYPE_TI_TEMPLATE (arg)) |
68361a03 | 9756 | != most_general_template (CLASSTYPE_TI_TEMPLATE (parm)))) |
4393e105 MM |
9757 | return NULL_TREE; |
9758 | ||
9759 | /* We need to make a new template argument vector for the call to | |
9760 | unify. If we used TARGS, we'd clutter it up with the result of | |
9761 | the attempted unification, even if this class didn't work out. | |
9762 | We also don't want to commit ourselves to all the unifications | |
9763 | we've already done, since unification is supposed to be done on | |
9764 | an argument-by-argument basis. In other words, consider the | |
9765 | following pathological case: | |
9766 | ||
9767 | template <int I, int J, int K> | |
9768 | struct S {}; | |
c8094d83 | 9769 | |
4393e105 MM |
9770 | template <int I, int J> |
9771 | struct S<I, J, 2> : public S<I, I, I>, S<J, J, J> {}; | |
c8094d83 | 9772 | |
4393e105 MM |
9773 | template <int I, int J, int K> |
9774 | void f(S<I, J, K>, S<I, I, I>); | |
c8094d83 | 9775 | |
4393e105 | 9776 | void g() { |
0cbd7506 MS |
9777 | S<0, 0, 0> s0; |
9778 | S<0, 1, 2> s2; | |
c8094d83 | 9779 | |
0cbd7506 | 9780 | f(s0, s2); |
4393e105 MM |
9781 | } |
9782 | ||
9783 | Now, by the time we consider the unification involving `s2', we | |
9784 | already know that we must have `f<0, 0, 0>'. But, even though | |
0e339752 | 9785 | `S<0, 1, 2>' is derived from `S<0, 0, 0>', the code is invalid |
4393e105 MM |
9786 | because there are two ways to unify base classes of S<0, 1, 2> |
9787 | with S<I, I, I>. If we kept the already deduced knowledge, we | |
9788 | would reject the possibility I=1. */ | |
f31c0a32 | 9789 | copy_of_targs = make_tree_vec (TREE_VEC_LENGTH (targs)); |
c8094d83 | 9790 | |
4393e105 | 9791 | /* If unification failed, we're done. */ |
74601d7c KL |
9792 | if (unify (tparms, copy_of_targs, CLASSTYPE_TI_ARGS (parm), |
9793 | CLASSTYPE_TI_ARGS (arg), UNIFY_ALLOW_NONE)) | |
4393e105 | 9794 | return NULL_TREE; |
74601d7c KL |
9795 | |
9796 | return arg; | |
4393e105 MM |
9797 | } |
9798 | ||
a3a0fc7f NS |
9799 | /* Given a template type PARM and a class type ARG, find the unique |
9800 | base type in ARG that is an instance of PARM. We do not examine | |
9801 | ARG itself; only its base-classes. If there is not exactly one | |
9802 | appropriate base class, return NULL_TREE. PARM may be the type of | |
9803 | a partial specialization, as well as a plain template type. Used | |
9804 | by unify. */ | |
4393e105 MM |
9805 | |
9806 | static tree | |
a3a0fc7f | 9807 | get_template_base (tree tparms, tree targs, tree parm, tree arg) |
fcfb9f96 | 9808 | { |
a3a0fc7f NS |
9809 | tree rval = NULL_TREE; |
9810 | tree binfo; | |
9811 | ||
9812 | gcc_assert (IS_AGGR_TYPE_CODE (TREE_CODE (arg))); | |
c8094d83 | 9813 | |
a3a0fc7f NS |
9814 | binfo = TYPE_BINFO (complete_type (arg)); |
9815 | if (!binfo) | |
9816 | /* The type could not be completed. */ | |
9817 | return NULL_TREE; | |
fcfb9f96 | 9818 | |
a3a0fc7f NS |
9819 | /* Walk in inheritance graph order. The search order is not |
9820 | important, and this avoids multiple walks of virtual bases. */ | |
9821 | for (binfo = TREE_CHAIN (binfo); binfo; binfo = TREE_CHAIN (binfo)) | |
fcfb9f96 | 9822 | { |
a3a0fc7f | 9823 | tree r = try_class_unification (tparms, targs, parm, BINFO_TYPE (binfo)); |
fcfb9f96 | 9824 | |
8d83768f NS |
9825 | if (r) |
9826 | { | |
9827 | /* If there is more than one satisfactory baseclass, then: | |
fcfb9f96 | 9828 | |
8d83768f | 9829 | [temp.deduct.call] |
fcfb9f96 | 9830 | |
8d83768f NS |
9831 | If they yield more than one possible deduced A, the type |
9832 | deduction fails. | |
4393e105 | 9833 | |
8d83768f | 9834 | applies. */ |
a3a0fc7f NS |
9835 | if (rval && !same_type_p (r, rval)) |
9836 | return NULL_TREE; | |
c8094d83 | 9837 | |
a3a0fc7f | 9838 | rval = r; |
8d83768f | 9839 | } |
fcfb9f96 MM |
9840 | } |
9841 | ||
a3a0fc7f | 9842 | return rval; |
fcfb9f96 MM |
9843 | } |
9844 | ||
db2767b6 MM |
9845 | /* Returns the level of DECL, which declares a template parameter. */ |
9846 | ||
e9659ab0 | 9847 | static int |
3a978d72 | 9848 | template_decl_level (tree decl) |
db2767b6 MM |
9849 | { |
9850 | switch (TREE_CODE (decl)) | |
9851 | { | |
9852 | case TYPE_DECL: | |
9853 | case TEMPLATE_DECL: | |
9854 | return TEMPLATE_TYPE_LEVEL (TREE_TYPE (decl)); | |
9855 | ||
9856 | case PARM_DECL: | |
9857 | return TEMPLATE_PARM_LEVEL (DECL_INITIAL (decl)); | |
9858 | ||
9859 | default: | |
315fb5db | 9860 | gcc_unreachable (); |
db2767b6 | 9861 | } |
315fb5db | 9862 | return 0; |
db2767b6 MM |
9863 | } |
9864 | ||
830bfa74 MM |
9865 | /* Decide whether ARG can be unified with PARM, considering only the |
9866 | cv-qualifiers of each type, given STRICT as documented for unify. | |
324f9dfb | 9867 | Returns nonzero iff the unification is OK on that basis. */ |
e92cc029 | 9868 | |
e9659ab0 | 9869 | static int |
3a978d72 | 9870 | check_cv_quals_for_unify (int strict, tree arg, tree parm) |
830bfa74 | 9871 | { |
4f2b0fb2 NS |
9872 | int arg_quals = cp_type_quals (arg); |
9873 | int parm_quals = cp_type_quals (parm); | |
9874 | ||
355f774d NS |
9875 | if (TREE_CODE (parm) == TEMPLATE_TYPE_PARM |
9876 | && !(strict & UNIFY_ALLOW_OUTER_MORE_CV_QUAL)) | |
4f2b0fb2 | 9877 | { |
2e9ceb77 | 9878 | /* Although a CVR qualifier is ignored when being applied to a |
0cbd7506 MS |
9879 | substituted template parameter ([8.3.2]/1 for example), that |
9880 | does not apply during deduction [14.8.2.4]/1, (even though | |
9881 | that is not explicitly mentioned, [14.8.2.4]/9 indicates | |
9882 | this). Except when we're allowing additional CV qualifiers | |
9883 | at the outer level [14.8.2.1]/3,1st bullet. */ | |
2e9ceb77 NS |
9884 | if ((TREE_CODE (arg) == REFERENCE_TYPE |
9885 | || TREE_CODE (arg) == FUNCTION_TYPE | |
9886 | || TREE_CODE (arg) == METHOD_TYPE) | |
9887 | && (parm_quals & (TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE))) | |
9888 | return 0; | |
9889 | ||
9890 | if ((!POINTER_TYPE_P (arg) && TREE_CODE (arg) != TEMPLATE_TYPE_PARM) | |
9891 | && (parm_quals & TYPE_QUAL_RESTRICT)) | |
9892 | return 0; | |
4f2b0fb2 | 9893 | } |
2e9ceb77 | 9894 | |
62e4a758 | 9895 | if (!(strict & (UNIFY_ALLOW_MORE_CV_QUAL | UNIFY_ALLOW_OUTER_MORE_CV_QUAL)) |
4f2b0fb2 | 9896 | && (arg_quals & parm_quals) != parm_quals) |
ef637255 MM |
9897 | return 0; |
9898 | ||
62e4a758 | 9899 | if (!(strict & (UNIFY_ALLOW_LESS_CV_QUAL | UNIFY_ALLOW_OUTER_LESS_CV_QUAL)) |
4f2b0fb2 | 9900 | && (parm_quals & arg_quals) != arg_quals) |
ef637255 MM |
9901 | return 0; |
9902 | ||
ef637255 | 9903 | return 1; |
830bfa74 MM |
9904 | } |
9905 | ||
9906 | /* Takes parameters as for type_unification. Returns 0 if the | |
dc957d14 | 9907 | type deduction succeeds, 1 otherwise. The parameter STRICT is a |
830bfa74 MM |
9908 | bitwise or of the following flags: |
9909 | ||
9910 | UNIFY_ALLOW_NONE: | |
9911 | Require an exact match between PARM and ARG. | |
9912 | UNIFY_ALLOW_MORE_CV_QUAL: | |
028d1f20 NS |
9913 | Allow the deduced ARG to be more cv-qualified (by qualification |
9914 | conversion) than ARG. | |
830bfa74 MM |
9915 | UNIFY_ALLOW_LESS_CV_QUAL: |
9916 | Allow the deduced ARG to be less cv-qualified than ARG. | |
9917 | UNIFY_ALLOW_DERIVED: | |
9918 | Allow the deduced ARG to be a template base class of ARG, | |
9919 | or a pointer to a template base class of the type pointed to by | |
161c12b0 JM |
9920 | ARG. |
9921 | UNIFY_ALLOW_INTEGER: | |
9922 | Allow any integral type to be deduced. See the TEMPLATE_PARM_INDEX | |
c8094d83 | 9923 | case for more information. |
028d1f20 NS |
9924 | UNIFY_ALLOW_OUTER_LEVEL: |
9925 | This is the outermost level of a deduction. Used to determine validity | |
9926 | of qualification conversions. A valid qualification conversion must | |
9927 | have const qualified pointers leading up to the inner type which | |
9928 | requires additional CV quals, except at the outer level, where const | |
9929 | is not required [conv.qual]. It would be normal to set this flag in | |
62e4a758 NS |
9930 | addition to setting UNIFY_ALLOW_MORE_CV_QUAL. |
9931 | UNIFY_ALLOW_OUTER_MORE_CV_QUAL: | |
9932 | This is the outermost level of a deduction, and PARM can be more CV | |
9933 | qualified at this point. | |
9934 | UNIFY_ALLOW_OUTER_LESS_CV_QUAL: | |
9935 | This is the outermost level of a deduction, and PARM can be less CV | |
8baddbf1 | 9936 | qualified at this point. */ |
830bfa74 | 9937 | |
e9659ab0 | 9938 | static int |
3a978d72 | 9939 | unify (tree tparms, tree targs, tree parm, tree arg, int strict) |
8d08fdba MS |
9940 | { |
9941 | int idx; | |
050367a3 | 9942 | tree targ; |
db2767b6 | 9943 | tree tparm; |
028d1f20 | 9944 | int strict_in = strict; |
8d08fdba MS |
9945 | |
9946 | /* I don't think this will do the right thing with respect to types. | |
9947 | But the only case I've seen it in so far has been array bounds, where | |
9948 | signedness is the only information lost, and I think that will be | |
9949 | okay. */ | |
9950 | while (TREE_CODE (parm) == NOP_EXPR) | |
9951 | parm = TREE_OPERAND (parm, 0); | |
9952 | ||
9953 | if (arg == error_mark_node) | |
9954 | return 1; | |
9955 | if (arg == unknown_type_node) | |
34016c81 JM |
9956 | /* We can't deduce anything from this, but we might get all the |
9957 | template args from other function args. */ | |
9958 | return 0; | |
9959 | ||
db2767b6 | 9960 | /* If PARM uses template parameters, then we can't bail out here, |
6bdb985f | 9961 | even if ARG == PARM, since we won't record unifications for the |
db2767b6 MM |
9962 | template parameters. We might need them if we're trying to |
9963 | figure out which of two things is more specialized. */ | |
9964 | if (arg == parm && !uses_template_parms (parm)) | |
8d08fdba MS |
9965 | return 0; |
9966 | ||
830bfa74 MM |
9967 | /* Immediately reject some pairs that won't unify because of |
9968 | cv-qualification mismatches. */ | |
9969 | if (TREE_CODE (arg) == TREE_CODE (parm) | |
2f939d94 | 9970 | && TYPE_P (arg) |
d0ab7624 | 9971 | /* It is the elements of the array which hold the cv quals of an array |
0cbd7506 MS |
9972 | type, and the elements might be template type parms. We'll check |
9973 | when we recurse. */ | |
d0ab7624 | 9974 | && TREE_CODE (arg) != ARRAY_TYPE |
830bfa74 MM |
9975 | /* We check the cv-qualifiers when unifying with template type |
9976 | parameters below. We want to allow ARG `const T' to unify with | |
9977 | PARM `T' for example, when computing which of two templates | |
9978 | is more specialized, for example. */ | |
9979 | && TREE_CODE (arg) != TEMPLATE_TYPE_PARM | |
028d1f20 | 9980 | && !check_cv_quals_for_unify (strict_in, arg, parm)) |
49432171 JM |
9981 | return 1; |
9982 | ||
028d1f20 | 9983 | if (!(strict & UNIFY_ALLOW_OUTER_LEVEL) |
3ea099f1 | 9984 | && TYPE_P (parm) && !CP_TYPE_CONST_P (parm)) |
028d1f20 NS |
9985 | strict &= ~UNIFY_ALLOW_MORE_CV_QUAL; |
9986 | strict &= ~UNIFY_ALLOW_OUTER_LEVEL; | |
9987 | strict &= ~UNIFY_ALLOW_DERIVED; | |
62e4a758 NS |
9988 | strict &= ~UNIFY_ALLOW_OUTER_MORE_CV_QUAL; |
9989 | strict &= ~UNIFY_ALLOW_OUTER_LESS_CV_QUAL; | |
c8094d83 | 9990 | |
8d08fdba MS |
9991 | switch (TREE_CODE (parm)) |
9992 | { | |
2ca340ae | 9993 | case TYPENAME_TYPE: |
fccef71e | 9994 | case SCOPE_REF: |
b8c6534b | 9995 | case UNBOUND_CLASS_TEMPLATE: |
2ca340ae JM |
9996 | /* In a type which contains a nested-name-specifier, template |
9997 | argument values cannot be deduced for template parameters used | |
9998 | within the nested-name-specifier. */ | |
9999 | return 0; | |
10000 | ||
8d08fdba | 10001 | case TEMPLATE_TYPE_PARM: |
73b0fce8 | 10002 | case TEMPLATE_TEMPLATE_PARM: |
a1281f45 | 10003 | case BOUND_TEMPLATE_TEMPLATE_PARM: |
db2767b6 MM |
10004 | tparm = TREE_VALUE (TREE_VEC_ELT (tparms, 0)); |
10005 | ||
10006 | if (TEMPLATE_TYPE_LEVEL (parm) | |
10007 | != template_decl_level (tparm)) | |
10008 | /* The PARM is not one we're trying to unify. Just check | |
10009 | to see if it matches ARG. */ | |
10010 | return (TREE_CODE (arg) == TREE_CODE (parm) | |
3bfdc719 | 10011 | && same_type_p (parm, arg)) ? 0 : 1; |
73b0fce8 | 10012 | idx = TEMPLATE_TYPE_IDX (parm); |
050367a3 | 10013 | targ = TREE_VEC_ELT (targs, idx); |
db2767b6 | 10014 | tparm = TREE_VALUE (TREE_VEC_ELT (tparms, idx)); |
050367a3 | 10015 | |
73b0fce8 | 10016 | /* Check for mixed types and values. */ |
db2767b6 MM |
10017 | if ((TREE_CODE (parm) == TEMPLATE_TYPE_PARM |
10018 | && TREE_CODE (tparm) != TYPE_DECL) | |
c8094d83 | 10019 | || (TREE_CODE (parm) == TEMPLATE_TEMPLATE_PARM |
db2767b6 | 10020 | && TREE_CODE (tparm) != TEMPLATE_DECL)) |
73b0fce8 KL |
10021 | return 1; |
10022 | ||
a1281f45 | 10023 | if (TREE_CODE (parm) == BOUND_TEMPLATE_TEMPLATE_PARM) |
73b0fce8 | 10024 | { |
b429fdf0 KL |
10025 | /* ARG must be constructed from a template class or a template |
10026 | template parameter. */ | |
10027 | if (TREE_CODE (arg) != BOUND_TEMPLATE_TEMPLATE_PARM | |
10028 | && (TREE_CODE (arg) != RECORD_TYPE || !CLASSTYPE_TEMPLATE_INFO (arg))) | |
a1281f45 | 10029 | return 1; |
73b0fce8 | 10030 | |
a1281f45 KL |
10031 | { |
10032 | tree parmtmpl = TYPE_TI_TEMPLATE (parm); | |
10033 | tree parmvec = TYPE_TI_ARGS (parm); | |
6df91b00 | 10034 | tree argvec = INNERMOST_TEMPLATE_ARGS (TYPE_TI_ARGS (arg)); |
a1281f45 | 10035 | tree argtmplvec |
b429fdf0 | 10036 | = DECL_INNERMOST_TEMPLATE_PARMS (TYPE_TI_TEMPLATE (arg)); |
a1281f45 | 10037 | int i; |
73b0fce8 | 10038 | |
c8094d83 MS |
10039 | /* The parameter and argument roles have to be switched here |
10040 | in order to handle default arguments properly. For example, | |
10041 | template<template <class> class TT> void f(TT<int>) | |
10042 | should be able to accept vector<int> which comes from | |
10043 | template <class T, class Allocator = allocator> | |
a1281f45 KL |
10044 | class vector. */ |
10045 | ||
ee3071ef | 10046 | if (coerce_template_parms (argtmplvec, parmvec, parmtmpl, 0, 1) |
0cbd7506 | 10047 | == error_mark_node) |
a1281f45 | 10048 | return 1; |
c8094d83 MS |
10049 | |
10050 | /* Deduce arguments T, i from TT<T> or TT<i>. | |
a1281f45 KL |
10051 | We check each element of PARMVEC and ARGVEC individually |
10052 | rather than the whole TREE_VEC since they can have | |
10053 | different number of elements. */ | |
6b9b6b15 | 10054 | |
a1281f45 KL |
10055 | for (i = 0; i < TREE_VEC_LENGTH (parmvec); ++i) |
10056 | { | |
0cbd7506 | 10057 | if (unify (tparms, targs, |
c8094d83 MS |
10058 | TREE_VEC_ELT (parmvec, i), |
10059 | TREE_VEC_ELT (argvec, i), | |
a1281f45 KL |
10060 | UNIFY_ALLOW_NONE)) |
10061 | return 1; | |
73b0fce8 | 10062 | } |
a1281f45 | 10063 | } |
b429fdf0 | 10064 | arg = TYPE_TI_TEMPLATE (arg); |
a1281f45 KL |
10065 | |
10066 | /* Fall through to deduce template name. */ | |
10067 | } | |
10068 | ||
10069 | if (TREE_CODE (parm) == TEMPLATE_TEMPLATE_PARM | |
10070 | || TREE_CODE (parm) == BOUND_TEMPLATE_TEMPLATE_PARM) | |
10071 | { | |
10072 | /* Deduce template name TT from TT, TT<>, TT<T> and TT<i>. */ | |
10073 | ||
10074 | /* Simple cases: Value already set, does match or doesn't. */ | |
10075 | if (targ != NULL_TREE && template_args_equal (targ, arg)) | |
10076 | return 0; | |
10077 | else if (targ) | |
10078 | return 1; | |
db2767b6 MM |
10079 | } |
10080 | else | |
10081 | { | |
830bfa74 MM |
10082 | /* If PARM is `const T' and ARG is only `int', we don't have |
10083 | a match unless we are allowing additional qualification. | |
10084 | If ARG is `const int' and PARM is just `T' that's OK; | |
10085 | that binds `const int' to `T'. */ | |
c8094d83 | 10086 | if (!check_cv_quals_for_unify (strict_in | UNIFY_ALLOW_LESS_CV_QUAL, |
830bfa74 | 10087 | arg, parm)) |
db2767b6 MM |
10088 | return 1; |
10089 | ||
830bfa74 MM |
10090 | /* Consider the case where ARG is `const volatile int' and |
10091 | PARM is `const T'. Then, T should be `volatile int'. */ | |
c2ea3a40 NS |
10092 | arg = cp_build_qualified_type_real |
10093 | (arg, cp_type_quals (arg) & ~cp_type_quals (parm), tf_none); | |
adecb3f4 MM |
10094 | if (arg == error_mark_node) |
10095 | return 1; | |
73b0fce8 | 10096 | |
a1281f45 KL |
10097 | /* Simple cases: Value already set, does match or doesn't. */ |
10098 | if (targ != NULL_TREE && same_type_p (targ, arg)) | |
10099 | return 0; | |
10100 | else if (targ) | |
10101 | return 1; | |
61cd552e | 10102 | |
94fc547c MM |
10103 | /* Make sure that ARG is not a variable-sized array. (Note |
10104 | that were talking about variable-sized arrays (like | |
10105 | `int[n]'), rather than arrays of unknown size (like | |
10106 | `int[]').) We'll get very confused by such a type since | |
10107 | the bound of the array will not be computable in an | |
10108 | instantiation. Besides, such types are not allowed in | |
10109 | ISO C++, so we can do as we please here. */ | |
5377d5ba | 10110 | if (variably_modified_type_p (arg, NULL_TREE)) |
94fc547c MM |
10111 | return 1; |
10112 | } | |
61cd552e | 10113 | |
050367a3 | 10114 | TREE_VEC_ELT (targs, idx) = arg; |
73b0fce8 KL |
10115 | return 0; |
10116 | ||
f84b4be9 | 10117 | case TEMPLATE_PARM_INDEX: |
db2767b6 MM |
10118 | tparm = TREE_VALUE (TREE_VEC_ELT (tparms, 0)); |
10119 | ||
c8094d83 | 10120 | if (TEMPLATE_PARM_LEVEL (parm) |
db2767b6 MM |
10121 | != template_decl_level (tparm)) |
10122 | /* The PARM is not one we're trying to unify. Just check | |
10123 | to see if it matches ARG. */ | |
c8a209ca NS |
10124 | return !(TREE_CODE (arg) == TREE_CODE (parm) |
10125 | && cp_tree_equal (parm, arg)); | |
db2767b6 | 10126 | |
f84b4be9 | 10127 | idx = TEMPLATE_PARM_IDX (parm); |
050367a3 | 10128 | targ = TREE_VEC_ELT (targs, idx); |
db2767b6 | 10129 | |
050367a3 | 10130 | if (targ) |
c8a209ca | 10131 | return !cp_tree_equal (targ, arg); |
8d08fdba | 10132 | |
161c12b0 JM |
10133 | /* [temp.deduct.type] If, in the declaration of a function template |
10134 | with a non-type template-parameter, the non-type | |
10135 | template-parameter is used in an expression in the function | |
10136 | parameter-list and, if the corresponding template-argument is | |
10137 | deduced, the template-argument type shall match the type of the | |
10138 | template-parameter exactly, except that a template-argument | |
c8094d83 | 10139 | deduced from an array bound may be of any integral type. |
d7c4edd0 | 10140 | The non-type parameter might use already deduced type parameters. */ |
bd0d5d4a | 10141 | tparm = tsubst (TREE_TYPE (parm), targs, 0, NULL_TREE); |
e2005c8d KL |
10142 | if (!TREE_TYPE (arg)) |
10143 | /* Template-parameter dependent expression. Just accept it for now. | |
10144 | It will later be processed in convert_template_argument. */ | |
10145 | ; | |
10146 | else if (same_type_p (TREE_TYPE (arg), tparm)) | |
10147 | /* OK */; | |
161c12b0 | 10148 | else if ((strict & UNIFY_ALLOW_INTEGER) |
bd0d5d4a JM |
10149 | && (TREE_CODE (tparm) == INTEGER_TYPE |
10150 | || TREE_CODE (tparm) == BOOLEAN_TYPE)) | |
8baddbf1 MM |
10151 | /* Convert the ARG to the type of PARM; the deduced non-type |
10152 | template argument must exactly match the types of the | |
10153 | corresponding parameter. */ | |
10154 | arg = fold (build_nop (TREE_TYPE (parm), arg)); | |
bd0d5d4a JM |
10155 | else if (uses_template_parms (tparm)) |
10156 | /* We haven't deduced the type of this parameter yet. Try again | |
10157 | later. */ | |
10158 | return 0; | |
161c12b0 JM |
10159 | else |
10160 | return 1; | |
10161 | ||
2a1e9fdd | 10162 | TREE_VEC_ELT (targs, idx) = arg; |
8d08fdba MS |
10163 | return 0; |
10164 | ||
28e8f3a0 GB |
10165 | case PTRMEM_CST: |
10166 | { | |
0cbd7506 MS |
10167 | /* A pointer-to-member constant can be unified only with |
10168 | another constant. */ | |
28e8f3a0 | 10169 | if (TREE_CODE (arg) != PTRMEM_CST) |
0cbd7506 | 10170 | return 1; |
28e8f3a0 GB |
10171 | |
10172 | /* Just unify the class member. It would be useless (and possibly | |
0cbd7506 MS |
10173 | wrong, depending on the strict flags) to unify also |
10174 | PTRMEM_CST_CLASS, because we want to be sure that both parm and | |
10175 | arg refer to the same variable, even if through different | |
10176 | classes. For instance: | |
28e8f3a0 | 10177 | |
0cbd7506 MS |
10178 | struct A { int x; }; |
10179 | struct B : A { }; | |
28e8f3a0 | 10180 | |
0cbd7506 | 10181 | Unification of &A::x and &B::x must succeed. */ |
28e8f3a0 | 10182 | return unify (tparms, targs, PTRMEM_CST_MEMBER (parm), |
0cbd7506 | 10183 | PTRMEM_CST_MEMBER (arg), strict); |
28e8f3a0 GB |
10184 | } |
10185 | ||
8d08fdba | 10186 | case POINTER_TYPE: |
830bfa74 | 10187 | { |
830bfa74 MM |
10188 | if (TREE_CODE (arg) != POINTER_TYPE) |
10189 | return 1; | |
c8094d83 | 10190 | |
830bfa74 MM |
10191 | /* [temp.deduct.call] |
10192 | ||
10193 | A can be another pointer or pointer to member type that can | |
10194 | be converted to the deduced A via a qualification | |
10195 | conversion (_conv.qual_). | |
10196 | ||
10197 | We pass down STRICT here rather than UNIFY_ALLOW_NONE. | |
10198 | This will allow for additional cv-qualification of the | |
028d1f20 | 10199 | pointed-to types if appropriate. */ |
c8094d83 | 10200 | |
028d1f20 | 10201 | if (TREE_CODE (TREE_TYPE (arg)) == RECORD_TYPE) |
830bfa74 MM |
10202 | /* The derived-to-base conversion only persists through one |
10203 | level of pointers. */ | |
028d1f20 | 10204 | strict |= (strict_in & UNIFY_ALLOW_DERIVED); |
830bfa74 | 10205 | |
c8094d83 | 10206 | return unify (tparms, targs, TREE_TYPE (parm), |
028d1f20 | 10207 | TREE_TYPE (arg), strict); |
830bfa74 | 10208 | } |
8d08fdba MS |
10209 | |
10210 | case REFERENCE_TYPE: | |
830bfa74 MM |
10211 | if (TREE_CODE (arg) != REFERENCE_TYPE) |
10212 | return 1; | |
10213 | return unify (tparms, targs, TREE_TYPE (parm), TREE_TYPE (arg), | |
028d1f20 | 10214 | strict & UNIFY_ALLOW_MORE_CV_QUAL); |
8d08fdba MS |
10215 | |
10216 | case ARRAY_TYPE: | |
10217 | if (TREE_CODE (arg) != ARRAY_TYPE) | |
10218 | return 1; | |
3042d5be MM |
10219 | if ((TYPE_DOMAIN (parm) == NULL_TREE) |
10220 | != (TYPE_DOMAIN (arg) == NULL_TREE)) | |
10221 | return 1; | |
8baddbf1 MM |
10222 | if (TYPE_DOMAIN (parm) != NULL_TREE) |
10223 | { | |
10224 | tree parm_max; | |
10225 | tree arg_max; | |
10226 | ||
10227 | parm_max = TYPE_MAX_VALUE (TYPE_DOMAIN (parm)); | |
10228 | arg_max = TYPE_MAX_VALUE (TYPE_DOMAIN (arg)); | |
10229 | ||
10230 | /* Our representation of array types uses "N - 1" as the | |
10231 | TYPE_MAX_VALUE for an array with "N" elements, if "N" is | |
10232 | not an integer constant. */ | |
10233 | if (TREE_CODE (parm_max) == MINUS_EXPR) | |
10234 | { | |
c8094d83 | 10235 | arg_max = fold_build2 (PLUS_EXPR, |
7866705a SB |
10236 | integer_type_node, |
10237 | arg_max, | |
10238 | TREE_OPERAND (parm_max, 1)); | |
8baddbf1 MM |
10239 | parm_max = TREE_OPERAND (parm_max, 0); |
10240 | } | |
10241 | ||
10242 | if (unify (tparms, targs, parm_max, arg_max, UNIFY_ALLOW_INTEGER)) | |
10243 | return 1; | |
10244 | } | |
830bfa74 | 10245 | return unify (tparms, targs, TREE_TYPE (parm), TREE_TYPE (arg), |
712467a4 | 10246 | strict & UNIFY_ALLOW_MORE_CV_QUAL); |
8d08fdba MS |
10247 | |
10248 | case REAL_TYPE: | |
37c46b43 | 10249 | case COMPLEX_TYPE: |
c00996a3 | 10250 | case VECTOR_TYPE: |
8d08fdba | 10251 | case INTEGER_TYPE: |
42976354 | 10252 | case BOOLEAN_TYPE: |
3590f0a6 | 10253 | case ENUMERAL_TYPE: |
5ad5a526 | 10254 | case VOID_TYPE: |
f376e137 MS |
10255 | if (TREE_CODE (arg) != TREE_CODE (parm)) |
10256 | return 1; | |
c8094d83 | 10257 | |
9edc3913 | 10258 | /* We have already checked cv-qualification at the top of the |
514a1f18 | 10259 | function. */ |
8baddbf1 | 10260 | if (!same_type_ignoring_top_level_qualifiers_p (arg, parm)) |
ca79f85d JM |
10261 | return 1; |
10262 | ||
8d08fdba MS |
10263 | /* As far as unification is concerned, this wins. Later checks |
10264 | will invalidate it if necessary. */ | |
10265 | return 0; | |
10266 | ||
10267 | /* Types INTEGER_CST and MINUS_EXPR can come from array bounds. */ | |
bd6dd845 | 10268 | /* Type INTEGER_CST can come from ordinary constant template args. */ |
8d08fdba | 10269 | case INTEGER_CST: |
bd6dd845 MS |
10270 | while (TREE_CODE (arg) == NOP_EXPR) |
10271 | arg = TREE_OPERAND (arg, 0); | |
10272 | ||
8d08fdba MS |
10273 | if (TREE_CODE (arg) != INTEGER_CST) |
10274 | return 1; | |
10275 | return !tree_int_cst_equal (parm, arg); | |
10276 | ||
8d08fdba MS |
10277 | case TREE_VEC: |
10278 | { | |
10279 | int i; | |
10280 | if (TREE_CODE (arg) != TREE_VEC) | |
10281 | return 1; | |
10282 | if (TREE_VEC_LENGTH (parm) != TREE_VEC_LENGTH (arg)) | |
10283 | return 1; | |
0dc09a61 | 10284 | for (i = 0; i < TREE_VEC_LENGTH (parm); ++i) |
830bfa74 | 10285 | if (unify (tparms, targs, |
8d08fdba | 10286 | TREE_VEC_ELT (parm, i), TREE_VEC_ELT (arg, i), |
4393e105 | 10287 | UNIFY_ALLOW_NONE)) |
8d08fdba MS |
10288 | return 1; |
10289 | return 0; | |
10290 | } | |
10291 | ||
8d08fdba | 10292 | case RECORD_TYPE: |
f181d4ae | 10293 | case UNION_TYPE: |
f181d4ae | 10294 | if (TREE_CODE (arg) != TREE_CODE (parm)) |
a4443a08 | 10295 | return 1; |
c8094d83 | 10296 | |
a7a64a77 MM |
10297 | if (TYPE_PTRMEMFUNC_P (parm)) |
10298 | { | |
10299 | if (!TYPE_PTRMEMFUNC_P (arg)) | |
10300 | return 1; | |
10301 | ||
c8094d83 | 10302 | return unify (tparms, targs, |
a7a64a77 MM |
10303 | TYPE_PTRMEMFUNC_FN_TYPE (parm), |
10304 | TYPE_PTRMEMFUNC_FN_TYPE (arg), | |
10305 | strict); | |
10306 | } | |
10307 | ||
5db698f6 | 10308 | if (CLASSTYPE_TEMPLATE_INFO (parm)) |
5566b478 | 10309 | { |
6467930b | 10310 | tree t = NULL_TREE; |
4393e105 | 10311 | |
028d1f20 | 10312 | if (strict_in & UNIFY_ALLOW_DERIVED) |
4393e105 MM |
10313 | { |
10314 | /* First, we try to unify the PARM and ARG directly. */ | |
10315 | t = try_class_unification (tparms, targs, | |
10316 | parm, arg); | |
10317 | ||
10318 | if (!t) | |
10319 | { | |
10320 | /* Fallback to the special case allowed in | |
10321 | [temp.deduct.call]: | |
c8094d83 | 10322 | |
4393e105 MM |
10323 | If P is a class, and P has the form |
10324 | template-id, then A can be a derived class of | |
10325 | the deduced A. Likewise, if P is a pointer to | |
10326 | a class of the form template-id, A can be a | |
10327 | pointer to a derived class pointed to by the | |
10328 | deduced A. */ | |
8d83768f | 10329 | t = get_template_base (tparms, targs, parm, arg); |
4393e105 | 10330 | |
8d83768f | 10331 | if (!t) |
4393e105 MM |
10332 | return 1; |
10333 | } | |
10334 | } | |
c8094d83 MS |
10335 | else if (CLASSTYPE_TEMPLATE_INFO (arg) |
10336 | && (CLASSTYPE_TI_TEMPLATE (parm) | |
9fbf56f7 | 10337 | == CLASSTYPE_TI_TEMPLATE (arg))) |
6df47b06 MM |
10338 | /* Perhaps PARM is something like S<U> and ARG is S<int>. |
10339 | Then, we should unify `int' and `U'. */ | |
6467930b | 10340 | t = arg; |
4393e105 | 10341 | else |
dc957d14 | 10342 | /* There's no chance of unification succeeding. */ |
5566b478 | 10343 | return 1; |
6467930b | 10344 | |
830bfa74 | 10345 | return unify (tparms, targs, CLASSTYPE_TI_ARGS (parm), |
4393e105 | 10346 | CLASSTYPE_TI_ARGS (t), UNIFY_ALLOW_NONE); |
5566b478 | 10347 | } |
9edc3913 | 10348 | else if (!same_type_ignoring_top_level_qualifiers_p (parm, arg)) |
5566b478 | 10349 | return 1; |
a4443a08 | 10350 | return 0; |
8d08fdba MS |
10351 | |
10352 | case METHOD_TYPE: | |
8d08fdba | 10353 | case FUNCTION_TYPE: |
830bfa74 | 10354 | if (TREE_CODE (arg) != TREE_CODE (parm)) |
8d08fdba | 10355 | return 1; |
830bfa74 | 10356 | |
38d18b1a NS |
10357 | /* CV qualifications for methods can never be deduced, they must |
10358 | match exactly. We need to check them explicitly here, | |
10359 | because type_unification_real treats them as any other | |
10360 | cvqualified parameter. */ | |
10361 | if (TREE_CODE (parm) == METHOD_TYPE | |
10362 | && (!check_cv_quals_for_unify | |
10363 | (UNIFY_ALLOW_NONE, | |
10364 | TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (arg))), | |
10365 | TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (parm)))))) | |
10366 | return 1; | |
10367 | ||
830bfa74 | 10368 | if (unify (tparms, targs, TREE_TYPE (parm), |
4393e105 | 10369 | TREE_TYPE (arg), UNIFY_ALLOW_NONE)) |
28cbf42c | 10370 | return 1; |
386b8a85 | 10371 | return type_unification_real (tparms, targs, TYPE_ARG_TYPES (parm), |
30f86ec3 FJ |
10372 | TYPE_ARG_TYPES (arg), 1, DEDUCE_EXACT, |
10373 | LOOKUP_NORMAL); | |
a4443a08 MS |
10374 | |
10375 | case OFFSET_TYPE: | |
9804209d | 10376 | /* Unify a pointer to member with a pointer to member function, which |
0cbd7506 | 10377 | deduces the type of the member as a function type. */ |
9804209d | 10378 | if (TYPE_PTRMEMFUNC_P (arg)) |
0cbd7506 MS |
10379 | { |
10380 | tree method_type; | |
10381 | tree fntype; | |
10382 | cp_cv_quals cv_quals; | |
10383 | ||
10384 | /* Check top-level cv qualifiers */ | |
10385 | if (!check_cv_quals_for_unify (UNIFY_ALLOW_NONE, arg, parm)) | |
10386 | return 1; | |
10387 | ||
10388 | if (unify (tparms, targs, TYPE_OFFSET_BASETYPE (parm), | |
10389 | TYPE_PTRMEMFUNC_OBJECT_TYPE (arg), UNIFY_ALLOW_NONE)) | |
10390 | return 1; | |
10391 | ||
10392 | /* Determine the type of the function we are unifying against. */ | |
10393 | method_type = TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (arg)); | |
10394 | fntype = | |
10395 | build_function_type (TREE_TYPE (method_type), | |
10396 | TREE_CHAIN (TYPE_ARG_TYPES (method_type))); | |
10397 | ||
10398 | /* Extract the cv-qualifiers of the member function from the | |
10399 | implicit object parameter and place them on the function | |
10400 | type to be restored later. */ | |
10401 | cv_quals = | |
10402 | cp_type_quals(TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (method_type)))); | |
10403 | fntype = build_qualified_type (fntype, cv_quals); | |
10404 | return unify (tparms, targs, TREE_TYPE (parm), fntype, strict); | |
10405 | } | |
9804209d | 10406 | |
a4443a08 MS |
10407 | if (TREE_CODE (arg) != OFFSET_TYPE) |
10408 | return 1; | |
830bfa74 | 10409 | if (unify (tparms, targs, TYPE_OFFSET_BASETYPE (parm), |
4393e105 | 10410 | TYPE_OFFSET_BASETYPE (arg), UNIFY_ALLOW_NONE)) |
a4443a08 | 10411 | return 1; |
830bfa74 | 10412 | return unify (tparms, targs, TREE_TYPE (parm), TREE_TYPE (arg), |
4393e105 | 10413 | strict); |
a4443a08 | 10414 | |
f62dbf03 | 10415 | case CONST_DECL: |
a723baf1 MM |
10416 | if (DECL_TEMPLATE_PARM_P (parm)) |
10417 | return unify (tparms, targs, DECL_INITIAL (parm), arg, strict); | |
c8094d83 | 10418 | if (arg != integral_constant_value (parm)) |
f62dbf03 JM |
10419 | return 1; |
10420 | return 0; | |
10421 | ||
28e8f3a0 | 10422 | case FIELD_DECL: |
027905b4 KL |
10423 | case TEMPLATE_DECL: |
10424 | /* Matched cases are handled by the ARG == PARM test above. */ | |
10425 | return 1; | |
10426 | ||
8d08fdba | 10427 | default: |
6615c446 | 10428 | gcc_assert (EXPR_P (parm)); |
c8094d83 | 10429 | |
98ddffc1 | 10430 | /* We must be looking at an expression. This can happen with |
c8094d83 MS |
10431 | something like: |
10432 | ||
98ddffc1 NS |
10433 | template <int I> |
10434 | void foo(S<I>, S<I + 2>); | |
050367a3 | 10435 | |
98ddffc1 | 10436 | This is a "nondeduced context": |
050367a3 | 10437 | |
98ddffc1 | 10438 | [deduct.type] |
c8094d83 | 10439 | |
98ddffc1 | 10440 | The nondeduced contexts are: |
050367a3 | 10441 | |
98ddffc1 NS |
10442 | --A type that is a template-id in which one or more of |
10443 | the template-arguments is an expression that references | |
c8094d83 | 10444 | a template-parameter. |
050367a3 | 10445 | |
98ddffc1 NS |
10446 | In these cases, we assume deduction succeeded, but don't |
10447 | actually infer any unifications. */ | |
74601d7c | 10448 | |
98ddffc1 NS |
10449 | if (!uses_template_parms (parm) |
10450 | && !template_args_equal (parm, arg)) | |
10451 | return 1; | |
10452 | else | |
10453 | return 0; | |
8d08fdba MS |
10454 | } |
10455 | } | |
8d08fdba | 10456 | \f |
4684cd27 MM |
10457 | /* Note that DECL can be defined in this translation unit, if |
10458 | required. */ | |
10459 | ||
10460 | static void | |
10461 | mark_definable (tree decl) | |
10462 | { | |
10463 | tree clone; | |
10464 | DECL_NOT_REALLY_EXTERN (decl) = 1; | |
10465 | FOR_EACH_CLONE (clone, decl) | |
10466 | DECL_NOT_REALLY_EXTERN (clone) = 1; | |
10467 | } | |
10468 | ||
03d0f4af | 10469 | /* Called if RESULT is explicitly instantiated, or is a member of an |
4684cd27 | 10470 | explicitly instantiated class. */ |
03d0f4af | 10471 | |
faae18ab | 10472 | void |
3a978d72 | 10473 | mark_decl_instantiated (tree result, int extern_p) |
faae18ab | 10474 | { |
415c974c | 10475 | SET_DECL_EXPLICIT_INSTANTIATION (result); |
3ae18eaf | 10476 | |
1f6f0cb6 MM |
10477 | /* If this entity has already been written out, it's too late to |
10478 | make any modifications. */ | |
10479 | if (TREE_ASM_WRITTEN (result)) | |
10480 | return; | |
10481 | ||
10482 | if (TREE_CODE (result) != FUNCTION_DECL) | |
10483 | /* The TREE_PUBLIC flag for function declarations will have been | |
10484 | set correctly by tsubst. */ | |
10485 | TREE_PUBLIC (result) = 1; | |
10486 | ||
346eeb15 JM |
10487 | /* This might have been set by an earlier implicit instantiation. */ |
10488 | DECL_COMDAT (result) = 0; | |
10489 | ||
4684cd27 MM |
10490 | if (extern_p) |
10491 | DECL_NOT_REALLY_EXTERN (result) = 0; | |
10492 | else | |
faae18ab | 10493 | { |
4684cd27 | 10494 | mark_definable (result); |
1a408d07 JM |
10495 | /* Always make artificials weak. */ |
10496 | if (DECL_ARTIFICIAL (result) && flag_weak) | |
10497 | comdat_linkage (result); | |
a7d87521 JM |
10498 | /* For WIN32 we also want to put explicit instantiations in |
10499 | linkonce sections. */ | |
1a408d07 | 10500 | else if (TREE_PUBLIC (result)) |
b385c841 | 10501 | maybe_make_one_only (result); |
faae18ab | 10502 | } |
c8094d83 | 10503 | |
4684cd27 MM |
10504 | /* If EXTERN_P, then this function will not be emitted -- unless |
10505 | followed by an explicit instantiation, at which point its linkage | |
10506 | will be adjusted. If !EXTERN_P, then this function will be | |
10507 | emitted here. In neither circumstance do we want | |
10508 | import_export_decl to adjust the linkage. */ | |
c8094d83 | 10509 | DECL_INTERFACE_KNOWN (result) = 1; |
faae18ab MS |
10510 | } |
10511 | ||
e5214479 | 10512 | /* Given two function templates PAT1 and PAT2, return: |
6467930b MS |
10513 | |
10514 | 1 if PAT1 is more specialized than PAT2 as described in [temp.func.order]. | |
10515 | -1 if PAT2 is more specialized than PAT1. | |
e5214479 JM |
10516 | 0 if neither is more specialized. |
10517 | ||
dda04398 NS |
10518 | LEN indicates the number of parameters we should consider |
10519 | (defaulted parameters should not be considered). | |
10520 | ||
10521 | The 1998 std underspecified function template partial ordering, and | |
10522 | DR214 addresses the issue. We take pairs of arguments, one from | |
c51940a2 | 10523 | each of the templates, and deduce them against each other. One of |
dda04398 NS |
10524 | the templates will be more specialized if all the *other* |
10525 | template's arguments deduce against its arguments and at least one | |
10526 | of its arguments *does* *not* deduce against the other template's | |
10527 | corresponding argument. Deduction is done as for class templates. | |
10528 | The arguments used in deduction have reference and top level cv | |
10529 | qualifiers removed. Iff both arguments were originally reference | |
10530 | types *and* deduction succeeds in both directions, the template | |
10531 | with the more cv-qualified argument wins for that pairing (if | |
10532 | neither is more cv-qualified, they both are equal). Unlike regular | |
10533 | deduction, after all the arguments have been deduced in this way, | |
10534 | we do *not* verify the deduced template argument values can be | |
10535 | substituted into non-deduced contexts, nor do we have to verify | |
10536 | that all template arguments have been deduced. */ | |
c8094d83 | 10537 | |
6467930b | 10538 | int |
dda04398 NS |
10539 | more_specialized_fn (tree pat1, tree pat2, int len) |
10540 | { | |
10541 | tree decl1 = DECL_TEMPLATE_RESULT (pat1); | |
10542 | tree decl2 = DECL_TEMPLATE_RESULT (pat2); | |
10543 | tree targs1 = make_tree_vec (DECL_NTPARMS (pat1)); | |
10544 | tree targs2 = make_tree_vec (DECL_NTPARMS (pat2)); | |
10545 | tree tparms1 = DECL_INNERMOST_TEMPLATE_PARMS (pat1); | |
10546 | tree tparms2 = DECL_INNERMOST_TEMPLATE_PARMS (pat2); | |
10547 | tree args1 = TYPE_ARG_TYPES (TREE_TYPE (decl1)); | |
10548 | tree args2 = TYPE_ARG_TYPES (TREE_TYPE (decl2)); | |
10549 | int better1 = 0; | |
10550 | int better2 = 0; | |
48884537 NS |
10551 | |
10552 | /* Remove the this parameter from non-static member functions. If | |
10553 | one is a non-static member function and the other is not a static | |
10554 | member function, remove the first parameter from that function | |
10555 | also. This situation occurs for operator functions where we | |
10556 | locate both a member function (with this pointer) and non-member | |
10557 | operator (with explicit first operand). */ | |
dda04398 | 10558 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (decl1)) |
48884537 NS |
10559 | { |
10560 | len--; /* LEN is the number of significant arguments for DECL1 */ | |
10561 | args1 = TREE_CHAIN (args1); | |
10562 | if (!DECL_STATIC_FUNCTION_P (decl2)) | |
10563 | args2 = TREE_CHAIN (args2); | |
10564 | } | |
10565 | else if (DECL_NONSTATIC_MEMBER_FUNCTION_P (decl2)) | |
10566 | { | |
10567 | args2 = TREE_CHAIN (args2); | |
10568 | if (!DECL_STATIC_FUNCTION_P (decl1)) | |
10569 | { | |
10570 | len--; | |
10571 | args1 = TREE_CHAIN (args1); | |
10572 | } | |
10573 | } | |
10574 | ||
ee307009 NS |
10575 | /* If only one is a conversion operator, they are unordered. */ |
10576 | if (DECL_CONV_FN_P (decl1) != DECL_CONV_FN_P (decl2)) | |
10577 | return 0; | |
c8094d83 | 10578 | |
dda04398 NS |
10579 | /* Consider the return type for a conversion function */ |
10580 | if (DECL_CONV_FN_P (decl1)) | |
10581 | { | |
dda04398 NS |
10582 | args1 = tree_cons (NULL_TREE, TREE_TYPE (TREE_TYPE (decl1)), args1); |
10583 | args2 = tree_cons (NULL_TREE, TREE_TYPE (TREE_TYPE (decl2)), args2); | |
10584 | len++; | |
10585 | } | |
c8094d83 | 10586 | |
dda04398 | 10587 | processing_template_decl++; |
c8094d83 | 10588 | |
dda04398 NS |
10589 | while (len--) |
10590 | { | |
10591 | tree arg1 = TREE_VALUE (args1); | |
10592 | tree arg2 = TREE_VALUE (args2); | |
10593 | int deduce1, deduce2; | |
10594 | int quals1 = -1; | |
10595 | int quals2 = -1; | |
6467930b | 10596 | |
dda04398 NS |
10597 | if (TREE_CODE (arg1) == REFERENCE_TYPE) |
10598 | { | |
10599 | arg1 = TREE_TYPE (arg1); | |
10600 | quals1 = cp_type_quals (arg1); | |
10601 | } | |
c8094d83 | 10602 | |
dda04398 NS |
10603 | if (TREE_CODE (arg2) == REFERENCE_TYPE) |
10604 | { | |
10605 | arg2 = TREE_TYPE (arg2); | |
10606 | quals2 = cp_type_quals (arg2); | |
10607 | } | |
6467930b | 10608 | |
dda04398 NS |
10609 | if ((quals1 < 0) != (quals2 < 0)) |
10610 | { | |
10611 | /* Only of the args is a reference, see if we should apply | |
10612 | array/function pointer decay to it. This is not part of | |
10613 | DR214, but is, IMHO, consistent with the deduction rules | |
10614 | for the function call itself, and with our earlier | |
10615 | implementation of the underspecified partial ordering | |
10616 | rules. (nathan). */ | |
10617 | if (quals1 >= 0) | |
10618 | { | |
10619 | switch (TREE_CODE (arg1)) | |
10620 | { | |
10621 | case ARRAY_TYPE: | |
10622 | arg1 = TREE_TYPE (arg1); | |
10623 | /* FALLTHROUGH. */ | |
10624 | case FUNCTION_TYPE: | |
10625 | arg1 = build_pointer_type (arg1); | |
10626 | break; | |
c8094d83 | 10627 | |
dda04398 NS |
10628 | default: |
10629 | break; | |
10630 | } | |
10631 | } | |
10632 | else | |
10633 | { | |
10634 | switch (TREE_CODE (arg2)) | |
10635 | { | |
10636 | case ARRAY_TYPE: | |
10637 | arg2 = TREE_TYPE (arg2); | |
10638 | /* FALLTHROUGH. */ | |
10639 | case FUNCTION_TYPE: | |
10640 | arg2 = build_pointer_type (arg2); | |
10641 | break; | |
c8094d83 | 10642 | |
dda04398 NS |
10643 | default: |
10644 | break; | |
10645 | } | |
10646 | } | |
10647 | } | |
c8094d83 | 10648 | |
dda04398 NS |
10649 | arg1 = TYPE_MAIN_VARIANT (arg1); |
10650 | arg2 = TYPE_MAIN_VARIANT (arg2); | |
c8094d83 | 10651 | |
dda04398 NS |
10652 | deduce1 = !unify (tparms1, targs1, arg1, arg2, UNIFY_ALLOW_NONE); |
10653 | deduce2 = !unify (tparms2, targs2, arg2, arg1, UNIFY_ALLOW_NONE); | |
10654 | ||
10655 | if (!deduce1) | |
10656 | better2 = -1; | |
10657 | if (!deduce2) | |
10658 | better1 = -1; | |
10659 | if (better1 < 0 && better2 < 0) | |
10660 | /* We've failed to deduce something in either direction. | |
10661 | These must be unordered. */ | |
10662 | break; | |
c8094d83 | 10663 | |
dda04398 NS |
10664 | if (deduce1 && deduce2 && quals1 >= 0 && quals2 >= 0) |
10665 | { | |
10666 | /* Deduces in both directions, see if quals can | |
10667 | disambiguate. Pretend the worse one failed to deduce. */ | |
10668 | if ((quals1 & quals2) == quals2) | |
10669 | deduce1 = 0; | |
10670 | if ((quals1 & quals2) == quals1) | |
10671 | deduce2 = 0; | |
10672 | } | |
10673 | if (deduce1 && !deduce2 && !better2) | |
10674 | better2 = 1; | |
10675 | if (deduce2 && !deduce1 && !better1) | |
10676 | better1 = 1; | |
c8094d83 | 10677 | |
dda04398 NS |
10678 | args1 = TREE_CHAIN (args1); |
10679 | args2 = TREE_CHAIN (args2); | |
10680 | } | |
10681 | ||
10682 | processing_template_decl--; | |
10683 | ||
10684 | return (better1 > 0) - (better2 > 0); | |
73aad9b9 | 10685 | } |
6467930b | 10686 | |
73aad9b9 | 10687 | /* Given two class template specialization list nodes PAT1 and PAT2, return: |
6467930b | 10688 | |
73aad9b9 JM |
10689 | 1 if PAT1 is more specialized than PAT2 as described in [temp.class.order]. |
10690 | -1 if PAT2 is more specialized than PAT1. | |
55ece1b3 KL |
10691 | 0 if neither is more specialized. |
10692 | ||
10693 | FULL_ARGS is the full set of template arguments that triggers this | |
10694 | partial ordering. */ | |
c8094d83 | 10695 | |
73aad9b9 | 10696 | int |
55ece1b3 | 10697 | more_specialized_class (tree pat1, tree pat2, tree full_args) |
73aad9b9 JM |
10698 | { |
10699 | tree targs; | |
10700 | int winner = 0; | |
10701 | ||
c8094d83 | 10702 | /* Just like what happens for functions, if we are ordering between |
baa49730 GB |
10703 | different class template specializations, we may encounter dependent |
10704 | types in the arguments, and we need our dependency check functions | |
10705 | to behave correctly. */ | |
10706 | ++processing_template_decl; | |
36a117a5 | 10707 | targs = get_class_bindings (TREE_VALUE (pat1), TREE_PURPOSE (pat1), |
55ece1b3 | 10708 | add_outermost_template_args (full_args, TREE_PURPOSE (pat2))); |
73aad9b9 JM |
10709 | if (targs) |
10710 | --winner; | |
10711 | ||
36a117a5 | 10712 | targs = get_class_bindings (TREE_VALUE (pat2), TREE_PURPOSE (pat2), |
55ece1b3 | 10713 | add_outermost_template_args (full_args, TREE_PURPOSE (pat1))); |
73aad9b9 | 10714 | if (targs) |
6467930b | 10715 | ++winner; |
baa49730 | 10716 | --processing_template_decl; |
6467930b MS |
10717 | |
10718 | return winner; | |
10719 | } | |
73aad9b9 JM |
10720 | |
10721 | /* Return the template arguments that will produce the function signature | |
e1467ff2 | 10722 | DECL from the function template FN, with the explicit template |
a34d3336 | 10723 | arguments EXPLICIT_ARGS. If CHECK_RETTYPE is true, the return type must |
4393e105 | 10724 | also match. Return NULL_TREE if no satisfactory arguments could be |
a34d3336 | 10725 | found. */ |
c8094d83 | 10726 | |
76b9a14d | 10727 | static tree |
a34d3336 | 10728 | get_bindings (tree fn, tree decl, tree explicit_args, bool check_rettype) |
73aad9b9 | 10729 | { |
98c1c668 | 10730 | int ntparms = DECL_NTPARMS (fn); |
f31c0a32 | 10731 | tree targs = make_tree_vec (ntparms); |
4393e105 | 10732 | tree decl_type; |
03017874 | 10733 | tree decl_arg_types; |
98c1c668 | 10734 | |
4393e105 MM |
10735 | /* Substitute the explicit template arguments into the type of DECL. |
10736 | The call to fn_type_unification will handle substitution into the | |
10737 | FN. */ | |
10738 | decl_type = TREE_TYPE (decl); | |
10739 | if (explicit_args && uses_template_parms (decl_type)) | |
10740 | { | |
10741 | tree tmpl; | |
10742 | tree converted_args; | |
10743 | ||
10744 | if (DECL_TEMPLATE_INFO (decl)) | |
10745 | tmpl = DECL_TI_TEMPLATE (decl); | |
10746 | else | |
0e339752 | 10747 | /* We can get here for some invalid specializations. */ |
4393e105 MM |
10748 | return NULL_TREE; |
10749 | ||
10750 | converted_args | |
10751 | = (coerce_template_parms (DECL_INNERMOST_TEMPLATE_PARMS (tmpl), | |
10752 | explicit_args, NULL_TREE, | |
c2ea3a40 | 10753 | tf_none, /*require_all_arguments=*/0)); |
4393e105 MM |
10754 | if (converted_args == error_mark_node) |
10755 | return NULL_TREE; | |
c8094d83 MS |
10756 | |
10757 | decl_type = tsubst (decl_type, converted_args, tf_none, NULL_TREE); | |
4393e105 MM |
10758 | if (decl_type == error_mark_node) |
10759 | return NULL_TREE; | |
10760 | } | |
10761 | ||
10762 | decl_arg_types = TYPE_ARG_TYPES (decl_type); | |
e5214479 JM |
10763 | /* Never do unification on the 'this' parameter. */ |
10764 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)) | |
03017874 | 10765 | decl_arg_types = TREE_CHAIN (decl_arg_types); |
d7684f2d | 10766 | |
c8094d83 | 10767 | if (fn_type_unification (fn, explicit_args, targs, |
03017874 | 10768 | decl_arg_types, |
8d3631f8 | 10769 | (check_rettype || DECL_CONV_FN_P (fn) |
0cbd7506 | 10770 | ? TREE_TYPE (decl_type) : NULL_TREE), |
30f86ec3 | 10771 | DEDUCE_EXACT, LOOKUP_NORMAL)) |
76b9a14d JM |
10772 | return NULL_TREE; |
10773 | ||
76b9a14d JM |
10774 | return targs; |
10775 | } | |
10776 | ||
36a117a5 MM |
10777 | /* Return the innermost template arguments that, when applied to a |
10778 | template specialization whose innermost template parameters are | |
9471d3e2 | 10779 | TPARMS, and whose specialization arguments are PARMS, yield the |
c8094d83 | 10780 | ARGS. |
36a117a5 MM |
10781 | |
10782 | For example, suppose we have: | |
10783 | ||
10784 | template <class T, class U> struct S {}; | |
10785 | template <class T> struct S<T*, int> {}; | |
10786 | ||
10787 | Then, suppose we want to get `S<double*, int>'. The TPARMS will be | |
10788 | {T}, the PARMS will be {T*, int} and the ARGS will be {double*, | |
10789 | int}. The resulting vector will be {double}, indicating that `T' | |
10790 | is bound to `double'. */ | |
10791 | ||
bd6dd845 | 10792 | static tree |
3a978d72 | 10793 | get_class_bindings (tree tparms, tree parms, tree args) |
73aad9b9 | 10794 | { |
3b3ba9f0 | 10795 | int i, ntparms = TREE_VEC_LENGTH (tparms); |
f31c0a32 | 10796 | tree vec = make_tree_vec (ntparms); |
73aad9b9 | 10797 | |
74601d7c | 10798 | if (unify (tparms, vec, parms, INNERMOST_TEMPLATE_ARGS (args), |
0cbd7506 | 10799 | UNIFY_ALLOW_NONE)) |
fcfb9f96 | 10800 | return NULL_TREE; |
73aad9b9 JM |
10801 | |
10802 | for (i = 0; i < ntparms; ++i) | |
10803 | if (! TREE_VEC_ELT (vec, i)) | |
10804 | return NULL_TREE; | |
10805 | ||
74601d7c KL |
10806 | if (verify_class_unification (vec, parms, args)) |
10807 | return NULL_TREE; | |
10808 | ||
73aad9b9 JM |
10809 | return vec; |
10810 | } | |
10811 | ||
104bf76a MM |
10812 | /* In INSTANTIATIONS is a list of <INSTANTIATION, TEMPLATE> pairs. |
10813 | Pick the most specialized template, and return the corresponding | |
10814 | instantiation, or if there is no corresponding instantiation, the | |
e5214479 JM |
10815 | template itself. If there is no most specialized template, |
10816 | error_mark_node is returned. If there are no templates at all, | |
10817 | NULL_TREE is returned. */ | |
73aad9b9 JM |
10818 | |
10819 | tree | |
3a978d72 | 10820 | most_specialized_instantiation (tree instantiations) |
73aad9b9 | 10821 | { |
104bf76a | 10822 | tree fn, champ; |
73aad9b9 | 10823 | |
104bf76a | 10824 | if (!instantiations) |
73aad9b9 | 10825 | return NULL_TREE; |
c8094d83 | 10826 | |
dda04398 | 10827 | ++processing_template_decl; |
c8094d83 | 10828 | |
104bf76a MM |
10829 | champ = instantiations; |
10830 | for (fn = TREE_CHAIN (instantiations); fn; fn = TREE_CHAIN (fn)) | |
73aad9b9 | 10831 | { |
dda04398 | 10832 | int fate = 0; |
c8094d83 | 10833 | |
a34d3336 NS |
10834 | if (get_bindings (TREE_VALUE (champ), |
10835 | DECL_TEMPLATE_RESULT (TREE_VALUE (fn)), | |
10836 | NULL_TREE, /*check_ret=*/false)) | |
dda04398 NS |
10837 | fate--; |
10838 | ||
a34d3336 NS |
10839 | if (get_bindings (TREE_VALUE (fn), |
10840 | DECL_TEMPLATE_RESULT (TREE_VALUE (champ)), | |
10841 | NULL_TREE, /*check_ret=*/false)) | |
dda04398 | 10842 | fate++; |
c8094d83 | 10843 | |
8ca4bf25 MM |
10844 | if (fate == -1) |
10845 | champ = fn; | |
10846 | else if (!fate) | |
73aad9b9 | 10847 | { |
8ca4bf25 MM |
10848 | /* Equally specialized, move to next function. If there |
10849 | is no next function, nothing's most specialized. */ | |
10850 | fn = TREE_CHAIN (fn); | |
10851 | if (!fn) | |
10852 | break; | |
73aad9b9 JM |
10853 | } |
10854 | } | |
c8094d83 | 10855 | |
dda04398 NS |
10856 | if (champ) |
10857 | /* Now verify that champ is better than everything earlier in the | |
10858 | instantiation list. */ | |
10859 | for (fn = instantiations; fn != champ; fn = TREE_CHAIN (fn)) | |
a34d3336 NS |
10860 | if (get_bindings (TREE_VALUE (champ), |
10861 | DECL_TEMPLATE_RESULT (TREE_VALUE (fn)), | |
10862 | NULL_TREE, /*check_ret=*/false) | |
10863 | || !get_bindings (TREE_VALUE (fn), | |
10864 | DECL_TEMPLATE_RESULT (TREE_VALUE (champ)), | |
10865 | NULL_TREE, /*check_ret=*/false)) | |
dda04398 NS |
10866 | { |
10867 | champ = NULL_TREE; | |
10868 | break; | |
10869 | } | |
c8094d83 | 10870 | |
dda04398 | 10871 | processing_template_decl--; |
c8094d83 | 10872 | |
dda04398 NS |
10873 | if (!champ) |
10874 | return error_mark_node; | |
73aad9b9 | 10875 | |
104bf76a MM |
10876 | return TREE_PURPOSE (champ) ? TREE_PURPOSE (champ) : TREE_VALUE (champ); |
10877 | } | |
10878 | ||
10879 | /* Return the most specialized of the list of templates in FNS that can | |
10880 | produce an instantiation matching DECL, given the explicit template | |
10881 | arguments EXPLICIT_ARGS. */ | |
10882 | ||
e9659ab0 | 10883 | static tree |
3a978d72 | 10884 | most_specialized (tree fns, tree decl, tree explicit_args) |
104bf76a MM |
10885 | { |
10886 | tree candidates = NULL_TREE; | |
10887 | tree fn, args; | |
10888 | ||
10889 | for (fn = fns; fn; fn = TREE_CHAIN (fn)) | |
10890 | { | |
10891 | tree candidate = TREE_VALUE (fn); | |
10892 | ||
a34d3336 | 10893 | args = get_bindings (candidate, decl, explicit_args, /*check_ret=*/true); |
104bf76a | 10894 | if (args) |
e1b3e07d | 10895 | candidates = tree_cons (NULL_TREE, candidate, candidates); |
104bf76a MM |
10896 | } |
10897 | ||
e5214479 | 10898 | return most_specialized_instantiation (candidates); |
73aad9b9 JM |
10899 | } |
10900 | ||
36a117a5 | 10901 | /* If DECL is a specialization of some template, return the most |
f9a7ae04 MM |
10902 | general such template. Otherwise, returns NULL_TREE. |
10903 | ||
10904 | For example, given: | |
36a117a5 MM |
10905 | |
10906 | template <class T> struct S { template <class U> void f(U); }; | |
10907 | ||
10908 | if TMPL is `template <class U> void S<int>::f(U)' this will return | |
10909 | the full template. This function will not trace past partial | |
10910 | specializations, however. For example, given in addition: | |
10911 | ||
10912 | template <class T> struct S<T*> { template <class U> void f(U); }; | |
10913 | ||
10914 | if TMPL is `template <class U> void S<int*>::f(U)' this will return | |
10915 | `template <class T> template <class U> S<T*>::f(U)'. */ | |
73aad9b9 | 10916 | |
612c671a | 10917 | tree |
3a978d72 | 10918 | most_general_template (tree decl) |
73aad9b9 | 10919 | { |
f9a7ae04 MM |
10920 | /* If DECL is a FUNCTION_DECL, find the TEMPLATE_DECL of which it is |
10921 | an immediate specialization. */ | |
10922 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
10923 | { | |
10924 | if (DECL_TEMPLATE_INFO (decl)) { | |
10925 | decl = DECL_TI_TEMPLATE (decl); | |
10926 | ||
10927 | /* The DECL_TI_TEMPLATE can be an IDENTIFIER_NODE for a | |
10928 | template friend. */ | |
10929 | if (TREE_CODE (decl) != TEMPLATE_DECL) | |
10930 | return NULL_TREE; | |
10931 | } else | |
10932 | return NULL_TREE; | |
10933 | } | |
10934 | ||
10935 | /* Look for more and more general templates. */ | |
10936 | while (DECL_TEMPLATE_INFO (decl)) | |
10937 | { | |
10b1d5e7 MM |
10938 | /* The DECL_TI_TEMPLATE can be an IDENTIFIER_NODE in some cases. |
10939 | (See cp-tree.h for details.) */ | |
f9a7ae04 MM |
10940 | if (TREE_CODE (DECL_TI_TEMPLATE (decl)) != TEMPLATE_DECL) |
10941 | break; | |
10942 | ||
6e049fcd KL |
10943 | if (CLASS_TYPE_P (TREE_TYPE (decl)) |
10944 | && CLASSTYPE_TEMPLATE_SPECIALIZATION (TREE_TYPE (decl))) | |
10945 | break; | |
10946 | ||
f9a7ae04 MM |
10947 | /* Stop if we run into an explicitly specialized class template. */ |
10948 | if (!DECL_NAMESPACE_SCOPE_P (decl) | |
10949 | && DECL_CONTEXT (decl) | |
10950 | && CLASSTYPE_TEMPLATE_SPECIALIZATION (DECL_CONTEXT (decl))) | |
10951 | break; | |
10952 | ||
10953 | decl = DECL_TI_TEMPLATE (decl); | |
10954 | } | |
36a117a5 MM |
10955 | |
10956 | return decl; | |
10957 | } | |
10958 | ||
10959 | /* Return the most specialized of the class template specializations | |
10960 | of TMPL which can produce an instantiation matching ARGS, or | |
10961 | error_mark_node if the choice is ambiguous. */ | |
10962 | ||
e9659ab0 | 10963 | static tree |
3a978d72 | 10964 | most_specialized_class (tree tmpl, tree args) |
36a117a5 MM |
10965 | { |
10966 | tree list = NULL_TREE; | |
10967 | tree t; | |
10968 | tree champ; | |
73aad9b9 JM |
10969 | int fate; |
10970 | ||
36a117a5 MM |
10971 | tmpl = most_general_template (tmpl); |
10972 | for (t = DECL_TEMPLATE_SPECIALIZATIONS (tmpl); t; t = TREE_CHAIN (t)) | |
73aad9b9 | 10973 | { |
c8094d83 | 10974 | tree spec_args |
36a117a5 MM |
10975 | = get_class_bindings (TREE_VALUE (t), TREE_PURPOSE (t), args); |
10976 | if (spec_args) | |
73aad9b9 | 10977 | { |
1f8f4a0b | 10978 | list = tree_cons (TREE_PURPOSE (t), TREE_VALUE (t), list); |
73aad9b9 JM |
10979 | TREE_TYPE (list) = TREE_TYPE (t); |
10980 | } | |
10981 | } | |
10982 | ||
10983 | if (! list) | |
10984 | return NULL_TREE; | |
10985 | ||
10986 | t = list; | |
10987 | champ = t; | |
10988 | t = TREE_CHAIN (t); | |
10989 | for (; t; t = TREE_CHAIN (t)) | |
10990 | { | |
55ece1b3 | 10991 | fate = more_specialized_class (champ, t, args); |
73aad9b9 JM |
10992 | if (fate == 1) |
10993 | ; | |
10994 | else | |
10995 | { | |
10996 | if (fate == 0) | |
10997 | { | |
10998 | t = TREE_CHAIN (t); | |
10999 | if (! t) | |
11000 | return error_mark_node; | |
11001 | } | |
11002 | champ = t; | |
11003 | } | |
11004 | } | |
11005 | ||
11006 | for (t = list; t && t != champ; t = TREE_CHAIN (t)) | |
11007 | { | |
55ece1b3 | 11008 | fate = more_specialized_class (champ, t, args); |
73aad9b9 JM |
11009 | if (fate != 1) |
11010 | return error_mark_node; | |
11011 | } | |
11012 | ||
11013 | return champ; | |
11014 | } | |
11015 | ||
eb8845be | 11016 | /* Explicitly instantiate DECL. */ |
e92cc029 | 11017 | |
8d08fdba | 11018 | void |
eb8845be | 11019 | do_decl_instantiation (tree decl, tree storage) |
8d08fdba | 11020 | { |
8d08fdba | 11021 | tree result = NULL_TREE; |
faae18ab | 11022 | int extern_p = 0; |
e8abc66f | 11023 | |
3fa56191 | 11024 | if (!decl) |
dc957d14 | 11025 | /* An error occurred, for which grokdeclarator has already issued |
3fa56191 MM |
11026 | an appropriate message. */ |
11027 | return; | |
11028 | else if (! DECL_LANG_SPECIFIC (decl)) | |
ec255269 | 11029 | { |
0f51ccfc | 11030 | error ("explicit instantiation of non-template %q#D", decl); |
ec255269 MS |
11031 | return; |
11032 | } | |
03d0f4af | 11033 | else if (TREE_CODE (decl) == VAR_DECL) |
6633d636 | 11034 | { |
03d0f4af MM |
11035 | /* There is an asymmetry here in the way VAR_DECLs and |
11036 | FUNCTION_DECLs are handled by grokdeclarator. In the case of | |
11037 | the latter, the DECL we get back will be marked as a | |
11038 | template instantiation, and the appropriate | |
11039 | DECL_TEMPLATE_INFO will be set up. This does not happen for | |
11040 | VAR_DECLs so we do the lookup here. Probably, grokdeclarator | |
11041 | should handle VAR_DECLs as it currently handles | |
11042 | FUNCTION_DECLs. */ | |
86ac0575 | 11043 | result = lookup_field (DECL_CONTEXT (decl), DECL_NAME (decl), 0, false); |
e0860732 | 11044 | if (!result || TREE_CODE (result) != VAR_DECL) |
03d0f4af | 11045 | { |
0f51ccfc | 11046 | error ("no matching template for %qD found", decl); |
03d0f4af MM |
11047 | return; |
11048 | } | |
6633d636 MS |
11049 | } |
11050 | else if (TREE_CODE (decl) != FUNCTION_DECL) | |
11051 | { | |
0f51ccfc | 11052 | error ("explicit instantiation of %q#D", decl); |
6633d636 MS |
11053 | return; |
11054 | } | |
03d0f4af MM |
11055 | else |
11056 | result = decl; | |
672476cb | 11057 | |
03d0f4af | 11058 | /* Check for various error cases. Note that if the explicit |
0e339752 | 11059 | instantiation is valid the RESULT will currently be marked as an |
03d0f4af MM |
11060 | *implicit* instantiation; DECL_EXPLICIT_INSTANTIATION is not set |
11061 | until we get here. */ | |
11062 | ||
11063 | if (DECL_TEMPLATE_SPECIALIZATION (result)) | |
672476cb | 11064 | { |
07782718 KL |
11065 | /* DR 259 [temp.spec]. |
11066 | ||
11067 | Both an explicit instantiation and a declaration of an explicit | |
11068 | specialization shall not appear in a program unless the explicit | |
11069 | instantiation follows a declaration of the explicit specialization. | |
03d0f4af | 11070 | |
07782718 KL |
11071 | For a given set of template parameters, if an explicit |
11072 | instantiation of a template appears after a declaration of an | |
11073 | explicit specialization for that template, the explicit | |
11074 | instantiation has no effect. */ | |
672476cb MM |
11075 | return; |
11076 | } | |
03d0f4af MM |
11077 | else if (DECL_EXPLICIT_INSTANTIATION (result)) |
11078 | { | |
11079 | /* [temp.spec] | |
98c1c668 | 11080 | |
03d0f4af | 11081 | No program shall explicitly instantiate any template more |
c8094d83 | 11082 | than once. |
03d0f4af | 11083 | |
4684cd27 MM |
11084 | We check DECL_NOT_REALLY_EXTERN so as not to complain when |
11085 | the first instantiation was `extern' and the second is not, | |
11086 | and EXTERN_P for the opposite case. */ | |
11087 | if (DECL_NOT_REALLY_EXTERN (result) && !extern_p) | |
0f51ccfc | 11088 | pedwarn ("duplicate explicit instantiation of %q#D", result); |
4684cd27 MM |
11089 | /* If an "extern" explicit instantiation follows an ordinary |
11090 | explicit instantiation, the template is instantiated. */ | |
11091 | if (extern_p) | |
03d0f4af MM |
11092 | return; |
11093 | } | |
11094 | else if (!DECL_IMPLICIT_INSTANTIATION (result)) | |
faae18ab | 11095 | { |
0f51ccfc | 11096 | error ("no matching template for %qD found", result); |
faae18ab MS |
11097 | return; |
11098 | } | |
03d0f4af | 11099 | else if (!DECL_TEMPLATE_INFO (result)) |
6633d636 | 11100 | { |
0f51ccfc | 11101 | pedwarn ("explicit instantiation of non-template %q#D", result); |
6633d636 MS |
11102 | return; |
11103 | } | |
11104 | ||
f0e01782 | 11105 | if (storage == NULL_TREE) |
00595019 | 11106 | ; |
faae18ab | 11107 | else if (storage == ridpointers[(int) RID_EXTERN]) |
03d0f4af | 11108 | { |
c02f5e29 | 11109 | if (pedantic && !in_system_header) |
0f51ccfc | 11110 | pedwarn ("ISO C++ forbids the use of %<extern%> on explicit " |
0cbd7506 | 11111 | "instantiations"); |
03d0f4af MM |
11112 | extern_p = 1; |
11113 | } | |
f0e01782 | 11114 | else |
0f51ccfc | 11115 | error ("storage class %qD applied to template instantiation", storage); |
9c12301f MM |
11116 | |
11117 | check_explicit_instantiation_namespace (result); | |
5566b478 | 11118 | mark_decl_instantiated (result, extern_p); |
c91a56d2 | 11119 | if (! extern_p) |
eba839f9 MM |
11120 | instantiate_decl (result, /*defer_ok=*/1, |
11121 | /*expl_inst_class_mem_p=*/false); | |
7177d104 MS |
11122 | } |
11123 | ||
faae18ab | 11124 | void |
3a978d72 | 11125 | mark_class_instantiated (tree t, int extern_p) |
faae18ab MS |
11126 | { |
11127 | SET_CLASSTYPE_EXPLICIT_INSTANTIATION (t); | |
eb773359 JM |
11128 | SET_CLASSTYPE_INTERFACE_KNOWN (t); |
11129 | CLASSTYPE_INTERFACE_ONLY (t) = extern_p; | |
faae18ab MS |
11130 | TYPE_DECL_SUPPRESS_DEBUG (TYPE_NAME (t)) = extern_p; |
11131 | if (! extern_p) | |
11132 | { | |
11133 | CLASSTYPE_DEBUG_REQUESTED (t) = 1; | |
11134 | rest_of_type_compilation (t, 1); | |
11135 | } | |
c8094d83 | 11136 | } |
e8abc66f | 11137 | |
5e0c54e5 | 11138 | /* Called from do_type_instantiation through binding_table_foreach to |
9bcb9aae | 11139 | do recursive instantiation for the type bound in ENTRY. */ |
5e0c54e5 GDR |
11140 | static void |
11141 | bt_instantiate_type_proc (binding_entry entry, void *data) | |
11142 | { | |
11143 | tree storage = *(tree *) data; | |
11144 | ||
11145 | if (IS_AGGR_TYPE (entry->type) | |
11146 | && !uses_template_parms (CLASSTYPE_TI_ARGS (entry->type))) | |
11147 | do_type_instantiation (TYPE_MAIN_DECL (entry->type), storage, 0); | |
11148 | } | |
11149 | ||
415c974c MA |
11150 | /* Called from do_type_instantiation to instantiate a member |
11151 | (a member function or a static member variable) of an | |
03fd3f84 | 11152 | explicitly instantiated class template. */ |
415c974c MA |
11153 | static void |
11154 | instantiate_class_member (tree decl, int extern_p) | |
11155 | { | |
11156 | mark_decl_instantiated (decl, extern_p); | |
415c974c | 11157 | if (! extern_p) |
eba839f9 MM |
11158 | instantiate_decl (decl, /*defer_ok=*/1, |
11159 | /*expl_inst_class_mem_p=*/true); | |
415c974c MA |
11160 | } |
11161 | ||
a1bcc528 JM |
11162 | /* Perform an explicit instantiation of template class T. STORAGE, if |
11163 | non-null, is the RID for extern, inline or static. COMPLAIN is | |
838dfd8a | 11164 | nonzero if this is called from the parser, zero if called recursively, |
a1bcc528 | 11165 | since the standard is unclear (as detailed below). */ |
c8094d83 | 11166 | |
7177d104 | 11167 | void |
3a978d72 | 11168 | do_type_instantiation (tree t, tree storage, tsubst_flags_t complain) |
7177d104 | 11169 | { |
e8abc66f MS |
11170 | int extern_p = 0; |
11171 | int nomem_p = 0; | |
5566b478 | 11172 | int static_p = 0; |
4746cf84 | 11173 | int previous_instantiation_extern_p = 0; |
5566b478 | 11174 | |
ca79f85d JM |
11175 | if (TREE_CODE (t) == TYPE_DECL) |
11176 | t = TREE_TYPE (t); | |
11177 | ||
7ddedda4 | 11178 | if (! CLASS_TYPE_P (t) || ! CLASSTYPE_TEMPLATE_INFO (t)) |
ca79f85d | 11179 | { |
0f51ccfc | 11180 | error ("explicit instantiation of non-template type %qT", t); |
ca79f85d JM |
11181 | return; |
11182 | } | |
11183 | ||
5566b478 | 11184 | complete_type (t); |
7177d104 | 11185 | |
d0f062fb | 11186 | if (!COMPLETE_TYPE_P (t)) |
f0e01782 | 11187 | { |
c2ea3a40 | 11188 | if (complain & tf_error) |
0f51ccfc | 11189 | error ("explicit instantiation of %q#T before definition of template", |
0cbd7506 | 11190 | t); |
f0e01782 MS |
11191 | return; |
11192 | } | |
11193 | ||
03d0f4af | 11194 | if (storage != NULL_TREE) |
f0e01782 | 11195 | { |
c02f5e29 | 11196 | if (pedantic && !in_system_header) |
c8094d83 | 11197 | pedwarn("ISO C++ forbids the use of %qE on explicit instantiations", |
0cbd7506 | 11198 | storage); |
03d0f4af MM |
11199 | |
11200 | if (storage == ridpointers[(int) RID_INLINE]) | |
11201 | nomem_p = 1; | |
11202 | else if (storage == ridpointers[(int) RID_EXTERN]) | |
11203 | extern_p = 1; | |
11204 | else if (storage == ridpointers[(int) RID_STATIC]) | |
11205 | static_p = 1; | |
11206 | else | |
11207 | { | |
0f51ccfc | 11208 | error ("storage class %qD applied to template instantiation", |
0cbd7506 | 11209 | storage); |
03d0f4af MM |
11210 | extern_p = 0; |
11211 | } | |
f0e01782 MS |
11212 | } |
11213 | ||
370af2d5 | 11214 | if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)) |
03d0f4af | 11215 | { |
07782718 | 11216 | /* DR 259 [temp.spec]. |
a292b002 | 11217 | |
07782718 KL |
11218 | Both an explicit instantiation and a declaration of an explicit |
11219 | specialization shall not appear in a program unless the explicit | |
11220 | instantiation follows a declaration of the explicit specialization. | |
11221 | ||
11222 | For a given set of template parameters, if an explicit | |
11223 | instantiation of a template appears after a declaration of an | |
11224 | explicit specialization for that template, the explicit | |
11225 | instantiation has no effect. */ | |
03d0f4af MM |
11226 | return; |
11227 | } | |
11228 | else if (CLASSTYPE_EXPLICIT_INSTANTIATION (t)) | |
44a8d0b3 | 11229 | { |
03d0f4af MM |
11230 | /* [temp.spec] |
11231 | ||
11232 | No program shall explicitly instantiate any template more | |
c8094d83 | 11233 | than once. |
03d0f4af | 11234 | |
0cbd7506 | 11235 | If PREVIOUS_INSTANTIATION_EXTERN_P, then the first explicit |
4746cf84 | 11236 | instantiation was `extern'. If EXTERN_P then the second is. |
4684cd27 | 11237 | These cases are OK. */ |
4746cf84 MA |
11238 | previous_instantiation_extern_p = CLASSTYPE_INTERFACE_ONLY (t); |
11239 | ||
11240 | if (!previous_instantiation_extern_p && !extern_p | |
c2ea3a40 | 11241 | && (complain & tf_error)) |
0f51ccfc | 11242 | pedwarn ("duplicate explicit instantiation of %q#T", t); |
c8094d83 | 11243 | |
03d0f4af MM |
11244 | /* If we've already instantiated the template, just return now. */ |
11245 | if (!CLASSTYPE_INTERFACE_ONLY (t)) | |
11246 | return; | |
44a8d0b3 | 11247 | } |
e8abc66f | 11248 | |
9c12301f | 11249 | check_explicit_instantiation_namespace (TYPE_NAME (t)); |
03d0f4af | 11250 | mark_class_instantiated (t, extern_p); |
03d0f4af | 11251 | |
e8abc66f MS |
11252 | if (nomem_p) |
11253 | return; | |
11254 | ||
7177d104 | 11255 | { |
db5ae43f | 11256 | tree tmp; |
5566b478 | 11257 | |
03d0f4af MM |
11258 | /* In contrast to implicit instantiation, where only the |
11259 | declarations, and not the definitions, of members are | |
11260 | instantiated, we have here: | |
11261 | ||
0cbd7506 | 11262 | [temp.explicit] |
03d0f4af MM |
11263 | |
11264 | The explicit instantiation of a class template specialization | |
11265 | implies the instantiation of all of its members not | |
11266 | previously explicitly specialized in the translation unit | |
c8094d83 | 11267 | containing the explicit instantiation. |
03d0f4af MM |
11268 | |
11269 | Of course, we can't instantiate member template classes, since | |
11270 | we don't have any arguments for them. Note that the standard | |
dc957d14 | 11271 | is unclear on whether the instantiation of the members are |
415c974c | 11272 | *explicit* instantiations or not. However, the most natural |
03fd3f84 | 11273 | interpretation is that it should be an explicit instantiation. */ |
03d0f4af | 11274 | |
5566b478 MS |
11275 | if (! static_p) |
11276 | for (tmp = TYPE_METHODS (t); tmp; tmp = TREE_CHAIN (tmp)) | |
a7d87521 | 11277 | if (TREE_CODE (tmp) == FUNCTION_DECL |
1f109f0f | 11278 | && DECL_TEMPLATE_INSTANTIATION (tmp)) |
415c974c | 11279 | instantiate_class_member (tmp, extern_p); |
5566b478 MS |
11280 | |
11281 | for (tmp = TYPE_FIELDS (t); tmp; tmp = TREE_CHAIN (tmp)) | |
11282 | if (TREE_CODE (tmp) == VAR_DECL && DECL_TEMPLATE_INSTANTIATION (tmp)) | |
415c974c | 11283 | instantiate_class_member (tmp, extern_p); |
7177d104 | 11284 | |
5e0c54e5 GDR |
11285 | if (CLASSTYPE_NESTED_UTDS (t)) |
11286 | binding_table_foreach (CLASSTYPE_NESTED_UTDS (t), | |
0cbd7506 | 11287 | bt_instantiate_type_proc, &storage); |
a292b002 | 11288 | } |
8d08fdba | 11289 | } |
a28e3c7f | 11290 | |
36a117a5 MM |
11291 | /* Given a function DECL, which is a specialization of TMPL, modify |
11292 | DECL to be a re-instantiation of TMPL with the same template | |
11293 | arguments. TMPL should be the template into which tsubst'ing | |
11294 | should occur for DECL, not the most general template. | |
830bfa74 MM |
11295 | |
11296 | One reason for doing this is a scenario like this: | |
11297 | ||
11298 | template <class T> | |
11299 | void f(const T&, int i); | |
11300 | ||
11301 | void g() { f(3, 7); } | |
11302 | ||
11303 | template <class T> | |
11304 | void f(const T& t, const int i) { } | |
11305 | ||
11306 | Note that when the template is first instantiated, with | |
11307 | instantiate_template, the resulting DECL will have no name for the | |
11308 | first parameter, and the wrong type for the second. So, when we go | |
11309 | to instantiate the DECL, we regenerate it. */ | |
11310 | ||
e9659ab0 | 11311 | static void |
3a978d72 | 11312 | regenerate_decl_from_template (tree decl, tree tmpl) |
830bfa74 | 11313 | { |
f9a7ae04 MM |
11314 | /* The arguments used to instantiate DECL, from the most general |
11315 | template. */ | |
830bfa74 | 11316 | tree args; |
830bfa74 | 11317 | tree code_pattern; |
830bfa74 MM |
11318 | |
11319 | args = DECL_TI_ARGS (decl); | |
11320 | code_pattern = DECL_TEMPLATE_RESULT (tmpl); | |
11321 | ||
2b907f5c KL |
11322 | /* Make sure that we can see identifiers, and compute access |
11323 | correctly. */ | |
11324 | push_access_scope (decl); | |
11325 | ||
c7222c02 MM |
11326 | if (TREE_CODE (decl) == FUNCTION_DECL) |
11327 | { | |
11328 | tree decl_parm; | |
11329 | tree pattern_parm; | |
11330 | tree specs; | |
11331 | int args_depth; | |
11332 | int parms_depth; | |
c8094d83 | 11333 | |
c7222c02 | 11334 | args_depth = TMPL_ARGS_DEPTH (args); |
c8094d83 | 11335 | parms_depth = TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (tmpl)); |
c7222c02 MM |
11336 | if (args_depth > parms_depth) |
11337 | args = get_innermost_template_args (args, parms_depth); | |
11338 | ||
11339 | specs = tsubst_exception_specification (TREE_TYPE (code_pattern), | |
11340 | args, tf_error, NULL_TREE); | |
11341 | if (specs) | |
11342 | TREE_TYPE (decl) = build_exception_variant (TREE_TYPE (decl), | |
11343 | specs); | |
11344 | ||
11345 | /* Merge parameter declarations. */ | |
c8094d83 | 11346 | decl_parm = skip_artificial_parms_for (decl, |
c7222c02 | 11347 | DECL_ARGUMENTS (decl)); |
c8094d83 | 11348 | pattern_parm |
c7222c02 MM |
11349 | = skip_artificial_parms_for (code_pattern, |
11350 | DECL_ARGUMENTS (code_pattern)); | |
11351 | while (decl_parm) | |
11352 | { | |
11353 | tree parm_type; | |
b17bba6d | 11354 | tree attributes; |
c7222c02 MM |
11355 | |
11356 | if (DECL_NAME (decl_parm) != DECL_NAME (pattern_parm)) | |
11357 | DECL_NAME (decl_parm) = DECL_NAME (pattern_parm); | |
11358 | parm_type = tsubst (TREE_TYPE (pattern_parm), args, tf_error, | |
11359 | NULL_TREE); | |
02bab9db | 11360 | parm_type = type_decays_to (parm_type); |
c7222c02 MM |
11361 | if (!same_type_p (TREE_TYPE (decl_parm), parm_type)) |
11362 | TREE_TYPE (decl_parm) = parm_type; | |
b17bba6d MM |
11363 | attributes = DECL_ATTRIBUTES (pattern_parm); |
11364 | if (DECL_ATTRIBUTES (decl_parm) != attributes) | |
11365 | { | |
11366 | DECL_ATTRIBUTES (decl_parm) = attributes; | |
11367 | cplus_decl_attributes (&decl_parm, attributes, /*flags=*/0); | |
11368 | } | |
c7222c02 MM |
11369 | decl_parm = TREE_CHAIN (decl_parm); |
11370 | pattern_parm = TREE_CHAIN (pattern_parm); | |
11371 | } | |
830bfa74 | 11372 | |
c7222c02 MM |
11373 | /* Merge additional specifiers from the CODE_PATTERN. */ |
11374 | if (DECL_DECLARED_INLINE_P (code_pattern) | |
11375 | && !DECL_DECLARED_INLINE_P (decl)) | |
11376 | DECL_DECLARED_INLINE_P (decl) = 1; | |
11377 | if (DECL_INLINE (code_pattern) && !DECL_INLINE (decl)) | |
11378 | DECL_INLINE (decl) = 1; | |
11379 | } | |
11380 | else if (TREE_CODE (decl) == VAR_DECL) | |
b794e321 MM |
11381 | DECL_INITIAL (decl) = |
11382 | tsubst_expr (DECL_INITIAL (code_pattern), args, | |
11383 | tf_error, DECL_TI_TEMPLATE (decl)); | |
c7222c02 MM |
11384 | else |
11385 | gcc_unreachable (); | |
36a117a5 | 11386 | |
2b59fc25 | 11387 | pop_access_scope (decl); |
830bfa74 MM |
11388 | } |
11389 | ||
a723baf1 MM |
11390 | /* Return the TEMPLATE_DECL into which DECL_TI_ARGS(DECL) should be |
11391 | substituted to get DECL. */ | |
11392 | ||
d58b7c2d | 11393 | tree |
a723baf1 MM |
11394 | template_for_substitution (tree decl) |
11395 | { | |
11396 | tree tmpl = DECL_TI_TEMPLATE (decl); | |
11397 | ||
11398 | /* Set TMPL to the template whose DECL_TEMPLATE_RESULT is the pattern | |
11399 | for the instantiation. This is not always the most general | |
11400 | template. Consider, for example: | |
11401 | ||
0cbd7506 | 11402 | template <class T> |
a723baf1 | 11403 | struct S { template <class U> void f(); |
0cbd7506 | 11404 | template <> void f<int>(); }; |
a723baf1 MM |
11405 | |
11406 | and an instantiation of S<double>::f<int>. We want TD to be the | |
11407 | specialization S<T>::f<int>, not the more general S<T>::f<U>. */ | |
11408 | while (/* An instantiation cannot have a definition, so we need a | |
11409 | more general template. */ | |
11410 | DECL_TEMPLATE_INSTANTIATION (tmpl) | |
11411 | /* We must also deal with friend templates. Given: | |
11412 | ||
c8094d83 | 11413 | template <class T> struct S { |
a723baf1 MM |
11414 | template <class U> friend void f() {}; |
11415 | }; | |
11416 | ||
11417 | S<int>::f<U> say, is not an instantiation of S<T>::f<U>, | |
11418 | so far as the language is concerned, but that's still | |
11419 | where we get the pattern for the instantiation from. On | |
11420 | other hand, if the definition comes outside the class, say: | |
11421 | ||
c8094d83 | 11422 | template <class T> struct S { |
a723baf1 MM |
11423 | template <class U> friend void f(); |
11424 | }; | |
11425 | template <class U> friend void f() {} | |
11426 | ||
11427 | we don't need to look any further. That's what the check for | |
11428 | DECL_INITIAL is for. */ | |
11429 | || (TREE_CODE (decl) == FUNCTION_DECL | |
11430 | && DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (tmpl) | |
11431 | && !DECL_INITIAL (DECL_TEMPLATE_RESULT (tmpl)))) | |
11432 | { | |
11433 | /* The present template, TD, should not be a definition. If it | |
11434 | were a definition, we should be using it! Note that we | |
11435 | cannot restructure the loop to just keep going until we find | |
11436 | a template with a definition, since that might go too far if | |
11437 | a specialization was declared, but not defined. */ | |
50bc768d NS |
11438 | gcc_assert (TREE_CODE (decl) != VAR_DECL |
11439 | || DECL_IN_AGGR_P (DECL_TEMPLATE_RESULT (tmpl))); | |
c8094d83 | 11440 | |
a723baf1 MM |
11441 | /* Fetch the more general template. */ |
11442 | tmpl = DECL_TI_TEMPLATE (tmpl); | |
11443 | } | |
11444 | ||
11445 | return tmpl; | |
11446 | } | |
11447 | ||
16d53b64 | 11448 | /* Produce the definition of D, a _DECL generated from a template. If |
838dfd8a | 11449 | DEFER_OK is nonzero, then we don't have to actually do the |
415c974c MA |
11450 | instantiation now; we just have to do it sometime. Normally it is |
11451 | an error if this is an explicit instantiation but D is undefined. | |
eba839f9 MM |
11452 | EXPL_INST_CLASS_MEM_P is true iff D is a member of an |
11453 | explicitly instantiated class template. */ | |
f84b4be9 | 11454 | |
a28e3c7f | 11455 | tree |
eba839f9 MM |
11456 | instantiate_decl (tree d, int defer_ok, |
11457 | bool expl_inst_class_mem_p) | |
a28e3c7f | 11458 | { |
36a117a5 | 11459 | tree tmpl = DECL_TI_TEMPLATE (d); |
65f8b0fb MM |
11460 | tree gen_args; |
11461 | tree args; | |
830bfa74 | 11462 | tree td; |
36a117a5 MM |
11463 | tree code_pattern; |
11464 | tree spec; | |
11465 | tree gen_tmpl; | |
b794e321 | 11466 | bool pattern_defined; |
31a714f6 | 11467 | int need_push; |
82a98427 | 11468 | location_t saved_loc = input_location; |
f7e4e484 | 11469 | bool external_p; |
c8094d83 | 11470 | |
36a117a5 MM |
11471 | /* This function should only be used to instantiate templates for |
11472 | functions and static member variables. */ | |
50bc768d NS |
11473 | gcc_assert (TREE_CODE (d) == FUNCTION_DECL |
11474 | || TREE_CODE (d) == VAR_DECL); | |
36a117a5 | 11475 | |
cec24319 MM |
11476 | /* Variables are never deferred; if instantiation is required, they |
11477 | are instantiated right away. That allows for better code in the | |
11478 | case that an expression refers to the value of the variable -- | |
11479 | if the variable has a constant value the referring expression can | |
11480 | take advantage of that fact. */ | |
11481 | if (TREE_CODE (d) == VAR_DECL) | |
11482 | defer_ok = 0; | |
11483 | ||
db9b2174 MM |
11484 | /* Don't instantiate cloned functions. Instead, instantiate the |
11485 | functions they cloned. */ | |
11486 | if (TREE_CODE (d) == FUNCTION_DECL && DECL_CLONED_FUNCTION_P (d)) | |
11487 | d = DECL_CLONED_FUNCTION (d); | |
11488 | ||
fbf1c34b | 11489 | if (DECL_TEMPLATE_INSTANTIATED (d)) |
03d0f4af | 11490 | /* D has already been instantiated. It might seem reasonable to |
dc957d14 | 11491 | check whether or not D is an explicit instantiation, and, if so, |
03d0f4af MM |
11492 | stop here. But when an explicit instantiation is deferred |
11493 | until the end of the compilation, DECL_EXPLICIT_INSTANTIATION | |
11494 | is set, even though we still need to do the instantiation. */ | |
36a117a5 MM |
11495 | return d; |
11496 | ||
11497 | /* If we already have a specialization of this declaration, then | |
11498 | there's no reason to instantiate it. Note that | |
11499 | retrieve_specialization gives us both instantiations and | |
11500 | specializations, so we must explicitly check | |
11501 | DECL_TEMPLATE_SPECIALIZATION. */ | |
11502 | gen_tmpl = most_general_template (tmpl); | |
65f8b0fb | 11503 | gen_args = DECL_TI_ARGS (d); |
c7222c02 MM |
11504 | spec = retrieve_specialization (gen_tmpl, gen_args, |
11505 | /*class_specializations_p=*/false); | |
36a117a5 MM |
11506 | if (spec != NULL_TREE && DECL_TEMPLATE_SPECIALIZATION (spec)) |
11507 | return spec; | |
11508 | ||
11509 | /* This needs to happen before any tsubsting. */ | |
11510 | if (! push_tinst_level (d)) | |
11511 | return d; | |
11512 | ||
297a5329 JM |
11513 | timevar_push (TV_PARSE); |
11514 | ||
4d85e00e | 11515 | /* Set TD to the template whose DECL_TEMPLATE_RESULT is the pattern |
a723baf1 MM |
11516 | for the instantiation. */ |
11517 | td = template_for_substitution (d); | |
fee23f54 | 11518 | code_pattern = DECL_TEMPLATE_RESULT (td); |
27bb8339 | 11519 | |
2d22db1f MM |
11520 | /* We should never be trying to instantiate a member of a class |
11521 | template or partial specialization. */ | |
11522 | gcc_assert (d != code_pattern); | |
11523 | ||
76d3baad KL |
11524 | if ((DECL_NAMESPACE_SCOPE_P (d) && !DECL_INITIALIZED_IN_CLASS_P (d)) |
11525 | || DECL_TEMPLATE_SPECIALIZATION (td)) | |
649fc72d NS |
11526 | /* In the case of a friend template whose definition is provided |
11527 | outside the class, we may have too many arguments. Drop the | |
76d3baad | 11528 | ones we don't need. The same is true for specializations. */ |
649fc72d NS |
11529 | args = get_innermost_template_args |
11530 | (gen_args, TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (td))); | |
11531 | else | |
11532 | args = gen_args; | |
65f8b0fb | 11533 | |
5566b478 | 11534 | if (TREE_CODE (d) == FUNCTION_DECL) |
39c76b4f | 11535 | pattern_defined = (DECL_SAVED_TREE (code_pattern) != NULL_TREE); |
5566b478 | 11536 | else |
36a117a5 | 11537 | pattern_defined = ! DECL_IN_AGGR_P (code_pattern); |
b794e321 MM |
11538 | |
11539 | /* We may be in the middle of deferred access check. Disable it now. */ | |
11540 | push_deferring_access_checks (dk_no_deferred); | |
11541 | ||
4684cd27 MM |
11542 | /* Unless an explicit instantiation directive has already determined |
11543 | the linkage of D, remember that a definition is available for | |
11544 | this entity. */ | |
c8094d83 | 11545 | if (pattern_defined |
4684cd27 MM |
11546 | && !DECL_INTERFACE_KNOWN (d) |
11547 | && !DECL_NOT_REALLY_EXTERN (d)) | |
11548 | mark_definable (d); | |
de22184b | 11549 | |
f31686a3 | 11550 | input_location = DECL_SOURCE_LOCATION (d); |
de22184b | 11551 | |
eba839f9 MM |
11552 | /* If D is a member of an explicitly instantiated class template, |
11553 | and no definition is available, treat it like an implicit | |
11554 | instantiation. */ | |
11555 | if (!pattern_defined && expl_inst_class_mem_p | |
11556 | && DECL_EXPLICIT_INSTANTIATION (d)) | |
5566b478 | 11557 | { |
4684cd27 | 11558 | DECL_NOT_REALLY_EXTERN (d) = 0; |
eba839f9 | 11559 | DECL_INTERFACE_KNOWN (d) = 0; |
4684cd27 | 11560 | SET_DECL_IMPLICIT_INSTANTIATION (d); |
5566b478 MS |
11561 | } |
11562 | ||
4f2b0fb2 NS |
11563 | if (!defer_ok) |
11564 | { | |
11565 | /* Recheck the substitutions to obtain any warning messages | |
11566 | about ignoring cv qualifiers. */ | |
11567 | tree gen = DECL_TEMPLATE_RESULT (gen_tmpl); | |
11568 | tree type = TREE_TYPE (gen); | |
11569 | ||
0e902d98 | 11570 | /* Make sure that we can see identifiers, and compute access |
2b59fc25 KL |
11571 | correctly. D is already the target FUNCTION_DECL with the |
11572 | right context. */ | |
11573 | push_access_scope (d); | |
0e902d98 | 11574 | |
4f2b0fb2 NS |
11575 | if (TREE_CODE (gen) == FUNCTION_DECL) |
11576 | { | |
65f8b0fb MM |
11577 | tsubst (DECL_ARGUMENTS (gen), gen_args, tf_error | tf_warning, d); |
11578 | tsubst (TYPE_RAISES_EXCEPTIONS (type), gen_args, | |
4f2b0fb2 NS |
11579 | tf_error | tf_warning, d); |
11580 | /* Don't simply tsubst the function type, as that will give | |
11581 | duplicate warnings about poor parameter qualifications. | |
11582 | The function arguments are the same as the decl_arguments | |
c6002625 | 11583 | without the top level cv qualifiers. */ |
4f2b0fb2 NS |
11584 | type = TREE_TYPE (type); |
11585 | } | |
65f8b0fb | 11586 | tsubst (type, gen_args, tf_error | tf_warning, d); |
0e902d98 | 11587 | |
2b59fc25 | 11588 | pop_access_scope (d); |
4f2b0fb2 | 11589 | } |
c8094d83 | 11590 | |
f7e4e484 MM |
11591 | /* Check to see whether we know that this template will be |
11592 | instantiated in some other file, as with "extern template" | |
11593 | extension. */ | |
11594 | external_p = (DECL_INTERFACE_KNOWN (d) && DECL_REALLY_EXTERN (d)); | |
11595 | /* In general, we do not instantiate such templates... */ | |
11596 | if (external_p | |
11597 | /* ... but we instantiate inline functions so that we can inline | |
11598 | them and ... */ | |
11599 | && ! (TREE_CODE (d) == FUNCTION_DECL && DECL_INLINE (d)) | |
11600 | /* ... we instantiate static data members whose values are | |
11601 | needed in integral constant expressions. */ | |
11602 | && ! (TREE_CODE (d) == VAR_DECL | |
11603 | && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (d))) | |
930cd796 | 11604 | goto out; |
16d53b64 | 11605 | /* Defer all other templates, unless we have been explicitly |
f7e4e484 MM |
11606 | forbidden from doing so. */ |
11607 | if (/* If there is no definition, we cannot instantiate the | |
11608 | template. */ | |
11609 | ! pattern_defined | |
11610 | /* If it's OK to postpone instantiation, do so. */ | |
11611 | || defer_ok | |
11612 | /* If this is a static data member that will be defined | |
11613 | elsewhere, we don't want to instantiate the entire data | |
11614 | member, but we do want to instantiate the initializer so that | |
11615 | we can substitute that elsewhere. */ | |
11616 | || (external_p && TREE_CODE (d) == VAR_DECL)) | |
16d53b64 | 11617 | { |
b794e321 MM |
11618 | /* The definition of the static data member is now required so |
11619 | we must substitute the initializer. */ | |
11620 | if (TREE_CODE (d) == VAR_DECL | |
11621 | && !DECL_INITIAL (d) | |
11622 | && DECL_INITIAL (code_pattern)) | |
11623 | { | |
4bff36d3 MM |
11624 | tree ns; |
11625 | tree init; | |
11626 | ||
11627 | ns = decl_namespace_context (d); | |
27a725e2 | 11628 | push_nested_namespace (ns); |
b794e321 | 11629 | push_nested_class (DECL_CONTEXT (d)); |
4bff36d3 MM |
11630 | init = tsubst_expr (DECL_INITIAL (code_pattern), |
11631 | args, | |
11632 | tf_error | tf_warning, NULL_TREE); | |
86414779 MM |
11633 | DECL_INITIAL (d) = init; |
11634 | cp_finish_decl (d, init, /*asmspec_tree=*/NULL_TREE, | |
11635 | LOOKUP_ONLYCONVERTING); | |
b794e321 | 11636 | pop_nested_class (); |
27a725e2 | 11637 | pop_nested_namespace (ns); |
b794e321 MM |
11638 | } |
11639 | ||
f7e4e484 MM |
11640 | /* We restore the source position here because it's used by |
11641 | add_pending_template. */ | |
82a98427 | 11642 | input_location = saved_loc; |
c27be9b9 | 11643 | |
c8094d83 | 11644 | if (at_eof && !pattern_defined |
03d0f4af MM |
11645 | && DECL_EXPLICIT_INSTANTIATION (d)) |
11646 | /* [temp.explicit] | |
11647 | ||
11648 | The definition of a non-exported function template, a | |
11649 | non-exported member function template, or a non-exported | |
11650 | member function or static data member of a class template | |
11651 | shall be present in every translation unit in which it is | |
11652 | explicitly instantiated. */ | |
33bd39a2 | 11653 | pedwarn |
0f51ccfc | 11654 | ("explicit instantiation of %qD but no definition available", d); |
03d0f4af | 11655 | |
f7e4e484 MM |
11656 | /* ??? Historically, we have instantiated inline functions, even |
11657 | when marked as "extern template". */ | |
11658 | if (!(external_p && TREE_CODE (d) == VAR_DECL)) | |
11659 | add_pending_template (d); | |
de22184b | 11660 | goto out; |
5566b478 | 11661 | } |
4684cd27 MM |
11662 | /* Tell the repository that D is available in this translation unit |
11663 | -- and see if it is supposed to be instantiated here. */ | |
11664 | if (TREE_PUBLIC (d) && !DECL_REALLY_EXTERN (d) && !repo_emit_p (d)) | |
11665 | { | |
11666 | /* In a PCH file, despite the fact that the repository hasn't | |
11667 | requested instantiation in the PCH it is still possible that | |
11668 | an instantiation will be required in a file that includes the | |
11669 | PCH. */ | |
11670 | if (pch_file) | |
11671 | add_pending_template (d); | |
11672 | /* Instantiate inline functions so that the inliner can do its | |
11673 | job, even though we'll not be emitting a copy of this | |
11674 | function. */ | |
c2a124b2 | 11675 | if (!(TREE_CODE (d) == FUNCTION_DECL |
c8094d83 | 11676 | && flag_inline_trees |
c2a124b2 | 11677 | && DECL_DECLARED_INLINE_P (d))) |
4684cd27 MM |
11678 | goto out; |
11679 | } | |
5566b478 | 11680 | |
6de9cd9a | 11681 | need_push = !cfun || !global_bindings_p (); |
31a714f6 MM |
11682 | if (need_push) |
11683 | push_to_top_level (); | |
414ea4aa | 11684 | |
66e0c440 KL |
11685 | /* Mark D as instantiated so that recursive calls to |
11686 | instantiate_decl do not try to instantiate it again. */ | |
11687 | DECL_TEMPLATE_INSTANTIATED (d) = 1; | |
11688 | ||
2b0a63a3 MM |
11689 | /* Regenerate the declaration in case the template has been modified |
11690 | by a subsequent redeclaration. */ | |
11691 | regenerate_decl_from_template (d, td); | |
4684cd27 | 11692 | |
120722ac | 11693 | /* We already set the file and line above. Reset them now in case |
6de9cd9a | 11694 | they changed as a result of calling regenerate_decl_from_template. */ |
f31686a3 | 11695 | input_location = DECL_SOURCE_LOCATION (d); |
5156628f | 11696 | |
5566b478 MS |
11697 | if (TREE_CODE (d) == VAR_DECL) |
11698 | { | |
1d62c33e MM |
11699 | /* Clear out DECL_RTL; whatever was there before may not be right |
11700 | since we've reset the type of the declaration. */ | |
11701 | SET_DECL_RTL (d, NULL_RTX); | |
5566b478 | 11702 | DECL_IN_AGGR_P (d) = 0; |
ea56c40c | 11703 | |
4684cd27 MM |
11704 | /* Clear DECL_EXTERNAL so that cp_finish_decl will process the |
11705 | initializer. That function will defer actual emission until | |
11706 | we have a chance to determine linkage. */ | |
11707 | DECL_EXTERNAL (d) = 0; | |
11708 | ||
73a8adb6 | 11709 | /* Enter the scope of D so that access-checking works correctly. */ |
4684cd27 | 11710 | push_nested_class (DECL_CONTEXT (d)); |
b794e321 | 11711 | cp_finish_decl (d, DECL_INITIAL (d), NULL_TREE, 0); |
73a8adb6 | 11712 | pop_nested_class (); |
5566b478 MS |
11713 | } |
11714 | else if (TREE_CODE (d) == FUNCTION_DECL) | |
11715 | { | |
6bbf1598 | 11716 | htab_t saved_local_specializations; |
a723baf1 MM |
11717 | tree subst_decl; |
11718 | tree tmpl_parm; | |
11719 | tree spec_parm; | |
6bbf1598 MM |
11720 | |
11721 | /* Save away the current list, in case we are instantiating one | |
11722 | template from within the body of another. */ | |
11723 | saved_local_specializations = local_specializations; | |
11724 | ||
6dfbb909 | 11725 | /* Set up the list of local specializations. */ |
c8094d83 | 11726 | local_specializations = htab_create (37, |
69f794a7 | 11727 | hash_local_specialization, |
a723baf1 | 11728 | eq_local_specializations, |
6dfbb909 MM |
11729 | NULL); |
11730 | ||
558475f0 | 11731 | /* Set up context. */ |
058b15c1 | 11732 | start_preparsed_function (d, NULL_TREE, SF_PRE_PARSED); |
5566b478 | 11733 | |
a723baf1 MM |
11734 | /* Create substitution entries for the parameters. */ |
11735 | subst_decl = DECL_TEMPLATE_RESULT (template_for_substitution (d)); | |
11736 | tmpl_parm = DECL_ARGUMENTS (subst_decl); | |
11737 | spec_parm = DECL_ARGUMENTS (d); | |
11738 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (d)) | |
11739 | { | |
11740 | register_local_specialization (spec_parm, tmpl_parm); | |
11741 | spec_parm = skip_artificial_parms_for (d, spec_parm); | |
11742 | tmpl_parm = skip_artificial_parms_for (subst_decl, tmpl_parm); | |
11743 | } | |
11744 | while (tmpl_parm) | |
11745 | { | |
11746 | register_local_specialization (spec_parm, tmpl_parm); | |
11747 | tmpl_parm = TREE_CHAIN (tmpl_parm); | |
11748 | spec_parm = TREE_CHAIN (spec_parm); | |
11749 | } | |
50bc768d | 11750 | gcc_assert (!spec_parm); |
a723baf1 | 11751 | |
558475f0 MM |
11752 | /* Substitute into the body of the function. */ |
11753 | tsubst_expr (DECL_SAVED_TREE (code_pattern), args, | |
c2ea3a40 | 11754 | tf_error | tf_warning, tmpl); |
558475f0 | 11755 | |
6dfbb909 MM |
11756 | /* We don't need the local specializations any more. */ |
11757 | htab_delete (local_specializations); | |
6bbf1598 | 11758 | local_specializations = saved_local_specializations; |
6dfbb909 | 11759 | |
4d6abc1c | 11760 | /* Finish the function. */ |
b2dd096b | 11761 | d = finish_function (0); |
8cd2462c | 11762 | expand_or_defer_fn (d); |
5566b478 MS |
11763 | } |
11764 | ||
971cbc14 MM |
11765 | /* We're not deferring instantiation any more. */ |
11766 | TI_PENDING_TEMPLATE_FLAG (DECL_TEMPLATE_INFO (d)) = 0; | |
11767 | ||
31a714f6 MM |
11768 | if (need_push) |
11769 | pop_from_top_level (); | |
414ea4aa | 11770 | |
de22184b | 11771 | out: |
82a98427 | 11772 | input_location = saved_loc; |
7d021397 | 11773 | pop_deferring_access_checks (); |
5566b478 | 11774 | pop_tinst_level (); |
a28e3c7f | 11775 | |
297a5329 JM |
11776 | timevar_pop (TV_PARSE); |
11777 | ||
a28e3c7f MS |
11778 | return d; |
11779 | } | |
5566b478 | 11780 | |
0aafb128 | 11781 | /* Run through the list of templates that we wish we could |
35046a54 KL |
11782 | instantiate, and instantiate any we can. RETRIES is the |
11783 | number of times we retry pending template instantiation. */ | |
0aafb128 | 11784 | |
35046a54 KL |
11785 | void |
11786 | instantiate_pending_templates (int retries) | |
0aafb128 MM |
11787 | { |
11788 | tree *t; | |
46ccf50a | 11789 | tree last = NULL_TREE; |
0aafb128 | 11790 | int reconsider; |
aad626f7 | 11791 | location_t saved_loc = input_location; |
12af7ba3 | 11792 | int saved_in_system_header = in_system_header; |
35046a54 KL |
11793 | |
11794 | /* Instantiating templates may trigger vtable generation. This in turn | |
11795 | may require further template instantiations. We place a limit here | |
11796 | to avoid infinite loop. */ | |
11797 | if (pending_templates && retries >= max_tinst_depth) | |
11798 | { | |
dee15844 JM |
11799 | error ("template instantiation depth exceeds maximum of %d" |
11800 | " instantiating %q+D, possibly from virtual table generation" | |
11801 | " (use -ftemplate-depth-NN to increase the maximum)", | |
11802 | max_tinst_depth, TREE_VALUE (pending_templates)); | |
35046a54 KL |
11803 | return; |
11804 | } | |
11805 | ||
c8094d83 | 11806 | do |
0aafb128 MM |
11807 | { |
11808 | reconsider = 0; | |
11809 | ||
11810 | t = &pending_templates; | |
11811 | while (*t) | |
11812 | { | |
0aafb128 MM |
11813 | tree instantiation = TREE_VALUE (*t); |
11814 | ||
3ae18eaf | 11815 | reopen_tinst_level (TREE_PURPOSE (*t)); |
0aafb128 | 11816 | |
2f939d94 | 11817 | if (TYPE_P (instantiation)) |
0aafb128 MM |
11818 | { |
11819 | tree fn; | |
11820 | ||
d0f062fb | 11821 | if (!COMPLETE_TYPE_P (instantiation)) |
0aafb128 MM |
11822 | { |
11823 | instantiate_class_template (instantiation); | |
11824 | if (CLASSTYPE_TEMPLATE_INSTANTIATION (instantiation)) | |
c8094d83 | 11825 | for (fn = TYPE_METHODS (instantiation); |
0aafb128 MM |
11826 | fn; |
11827 | fn = TREE_CHAIN (fn)) | |
11828 | if (! DECL_ARTIFICIAL (fn)) | |
eba839f9 MM |
11829 | instantiate_decl (fn, |
11830 | /*defer_ok=*/0, | |
11831 | /*expl_inst_class_mem_p=*/false); | |
d0f062fb | 11832 | if (COMPLETE_TYPE_P (instantiation)) |
35046a54 | 11833 | reconsider = 1; |
0aafb128 MM |
11834 | } |
11835 | ||
d0f062fb | 11836 | if (COMPLETE_TYPE_P (instantiation)) |
0aafb128 MM |
11837 | /* If INSTANTIATION has been instantiated, then we don't |
11838 | need to consider it again in the future. */ | |
11839 | *t = TREE_CHAIN (*t); | |
46ccf50a JM |
11840 | else |
11841 | { | |
11842 | last = *t; | |
11843 | t = &TREE_CHAIN (*t); | |
11844 | } | |
0aafb128 MM |
11845 | } |
11846 | else | |
11847 | { | |
16d53b64 | 11848 | if (!DECL_TEMPLATE_SPECIALIZATION (instantiation) |
0aafb128 MM |
11849 | && !DECL_TEMPLATE_INSTANTIATED (instantiation)) |
11850 | { | |
eba839f9 MM |
11851 | instantiation |
11852 | = instantiate_decl (instantiation, | |
11853 | /*defer_ok=*/0, | |
11854 | /*expl_inst_class_mem_p=*/false); | |
0aafb128 | 11855 | if (DECL_TEMPLATE_INSTANTIATED (instantiation)) |
35046a54 | 11856 | reconsider = 1; |
0aafb128 MM |
11857 | } |
11858 | ||
16d53b64 | 11859 | if (DECL_TEMPLATE_SPECIALIZATION (instantiation) |
0aafb128 MM |
11860 | || DECL_TEMPLATE_INSTANTIATED (instantiation)) |
11861 | /* If INSTANTIATION has been instantiated, then we don't | |
11862 | need to consider it again in the future. */ | |
11863 | *t = TREE_CHAIN (*t); | |
46ccf50a JM |
11864 | else |
11865 | { | |
11866 | last = *t; | |
11867 | t = &TREE_CHAIN (*t); | |
11868 | } | |
0aafb128 | 11869 | } |
84e5ca0f NS |
11870 | tinst_depth = 0; |
11871 | current_tinst_level = NULL_TREE; | |
0aafb128 | 11872 | } |
46ccf50a | 11873 | last_pending_template = last; |
c8094d83 | 11874 | } |
0aafb128 MM |
11875 | while (reconsider); |
11876 | ||
aad626f7 | 11877 | input_location = saved_loc; |
12af7ba3 | 11878 | in_system_header = saved_in_system_header; |
0aafb128 MM |
11879 | } |
11880 | ||
fd74ca0b MM |
11881 | /* Substitute ARGVEC into T, which is a list of initializers for |
11882 | either base class or a non-static data member. The TREE_PURPOSEs | |
11883 | are DECLs, and the TREE_VALUEs are the initializer values. Used by | |
11884 | instantiate_decl. */ | |
4393e105 | 11885 | |
824b9a4c | 11886 | static tree |
3a978d72 | 11887 | tsubst_initializer_list (tree t, tree argvec) |
5566b478 | 11888 | { |
2282d28d | 11889 | tree inits = NULL_TREE; |
5566b478 MS |
11890 | |
11891 | for (; t; t = TREE_CHAIN (t)) | |
11892 | { | |
fd74ca0b MM |
11893 | tree decl; |
11894 | tree init; | |
fd74ca0b | 11895 | |
c2ea3a40 | 11896 | decl = tsubst_copy (TREE_PURPOSE (t), argvec, tf_error | tf_warning, |
fd74ca0b | 11897 | NULL_TREE); |
1f5a253a NS |
11898 | decl = expand_member_init (decl); |
11899 | if (decl && !DECL_P (decl)) | |
11900 | in_base_initializer = 1; | |
c8094d83 | 11901 | |
c2ea3a40 | 11902 | init = tsubst_expr (TREE_VALUE (t), argvec, tf_error | tf_warning, |
fd74ca0b | 11903 | NULL_TREE); |
1f5a253a NS |
11904 | in_base_initializer = 0; |
11905 | ||
11906 | if (decl) | |
2282d28d | 11907 | { |
1f5a253a | 11908 | init = build_tree_list (decl, init); |
2282d28d MM |
11909 | TREE_CHAIN (init) = inits; |
11910 | inits = init; | |
11911 | } | |
5566b478 | 11912 | } |
2282d28d | 11913 | return inits; |
5566b478 MS |
11914 | } |
11915 | ||
61a127b3 MM |
11916 | /* Set CURRENT_ACCESS_SPECIFIER based on the protection of DECL. */ |
11917 | ||
11918 | static void | |
3a978d72 | 11919 | set_current_access_from_decl (tree decl) |
61a127b3 MM |
11920 | { |
11921 | if (TREE_PRIVATE (decl)) | |
11922 | current_access_specifier = access_private_node; | |
11923 | else if (TREE_PROTECTED (decl)) | |
11924 | current_access_specifier = access_protected_node; | |
11925 | else | |
11926 | current_access_specifier = access_public_node; | |
11927 | } | |
11928 | ||
dbfe2124 MM |
11929 | /* Instantiate an enumerated type. TAG is the template type, NEWTAG |
11930 | is the instantiation (which should have been created with | |
11931 | start_enum) and ARGS are the template arguments to use. */ | |
b87692e5 | 11932 | |
dbfe2124 | 11933 | static void |
3a978d72 | 11934 | tsubst_enum (tree tag, tree newtag, tree args) |
b87692e5 | 11935 | { |
dbfe2124 | 11936 | tree e; |
b87692e5 MS |
11937 | |
11938 | for (e = TYPE_VALUES (tag); e; e = TREE_CHAIN (e)) | |
11939 | { | |
61a127b3 | 11940 | tree value; |
7b6d72fc MM |
11941 | tree decl; |
11942 | ||
11943 | decl = TREE_VALUE (e); | |
61a127b3 MM |
11944 | /* Note that in a template enum, the TREE_VALUE is the |
11945 | CONST_DECL, not the corresponding INTEGER_CST. */ | |
c8094d83 | 11946 | value = tsubst_expr (DECL_INITIAL (decl), |
c2ea3a40 | 11947 | args, tf_error | tf_warning, |
4393e105 | 11948 | NULL_TREE); |
61a127b3 MM |
11949 | |
11950 | /* Give this enumeration constant the correct access. */ | |
7b6d72fc | 11951 | set_current_access_from_decl (decl); |
61a127b3 MM |
11952 | |
11953 | /* Actually build the enumerator itself. */ | |
c8094d83 | 11954 | build_enumerator (DECL_NAME (decl), value, newtag); |
dbfe2124 | 11955 | } |
b3d5a58b | 11956 | |
219670f1 | 11957 | finish_enum (newtag); |
f31686a3 RH |
11958 | DECL_SOURCE_LOCATION (TYPE_NAME (newtag)) |
11959 | = DECL_SOURCE_LOCATION (TYPE_NAME (tag)); | |
b87692e5 | 11960 | } |
36a117a5 | 11961 | |
1f6e1acc AS |
11962 | /* DECL is a FUNCTION_DECL that is a template specialization. Return |
11963 | its type -- but without substituting the innermost set of template | |
11964 | arguments. So, innermost set of template parameters will appear in | |
5c74d5b0 | 11965 | the type. */ |
1f6e1acc | 11966 | |
c8094d83 | 11967 | tree |
3a978d72 | 11968 | get_mostly_instantiated_function_type (tree decl) |
1f6e1acc | 11969 | { |
1f6e1acc AS |
11970 | tree fn_type; |
11971 | tree tmpl; | |
11972 | tree targs; | |
11973 | tree tparms; | |
11974 | int parm_depth; | |
11975 | ||
11976 | tmpl = most_general_template (DECL_TI_TEMPLATE (decl)); | |
11977 | targs = DECL_TI_ARGS (decl); | |
11978 | tparms = DECL_TEMPLATE_PARMS (tmpl); | |
11979 | parm_depth = TMPL_PARMS_DEPTH (tparms); | |
11980 | ||
11981 | /* There should be as many levels of arguments as there are levels | |
11982 | of parameters. */ | |
50bc768d | 11983 | gcc_assert (parm_depth == TMPL_ARGS_DEPTH (targs)); |
1f6e1acc AS |
11984 | |
11985 | fn_type = TREE_TYPE (tmpl); | |
1f6e1acc AS |
11986 | |
11987 | if (parm_depth == 1) | |
11988 | /* No substitution is necessary. */ | |
11989 | ; | |
11990 | else | |
11991 | { | |
fae6e246 | 11992 | int i, save_access_control; |
1f6e1acc AS |
11993 | tree partial_args; |
11994 | ||
11995 | /* Replace the innermost level of the TARGS with NULL_TREEs to | |
dc957d14 | 11996 | let tsubst know not to substitute for those parameters. */ |
1f6e1acc AS |
11997 | partial_args = make_tree_vec (TREE_VEC_LENGTH (targs)); |
11998 | for (i = 1; i < TMPL_ARGS_DEPTH (targs); ++i) | |
11999 | SET_TMPL_ARGS_LEVEL (partial_args, i, | |
12000 | TMPL_ARGS_LEVEL (targs, i)); | |
12001 | SET_TMPL_ARGS_LEVEL (partial_args, | |
12002 | TMPL_ARGS_DEPTH (targs), | |
12003 | make_tree_vec (DECL_NTPARMS (tmpl))); | |
12004 | ||
fae6e246 RH |
12005 | /* Disable access control as this function is used only during |
12006 | name-mangling. */ | |
12007 | save_access_control = flag_access_control; | |
12008 | flag_access_control = 0; | |
5c74d5b0 | 12009 | |
9579624e | 12010 | ++processing_template_decl; |
1f6e1acc AS |
12011 | /* Now, do the (partial) substitution to figure out the |
12012 | appropriate function type. */ | |
c2ea3a40 | 12013 | fn_type = tsubst (fn_type, partial_args, tf_error, NULL_TREE); |
9579624e | 12014 | --processing_template_decl; |
1f6e1acc AS |
12015 | |
12016 | /* Substitute into the template parameters to obtain the real | |
12017 | innermost set of parameters. This step is important if the | |
12018 | innermost set of template parameters contains value | |
12019 | parameters whose types depend on outer template parameters. */ | |
12020 | TREE_VEC_LENGTH (partial_args)--; | |
c2ea3a40 | 12021 | tparms = tsubst_template_parms (tparms, partial_args, tf_error); |
1f6e1acc | 12022 | |
fae6e246 | 12023 | flag_access_control = save_access_control; |
5c74d5b0 | 12024 | } |
1f6e1acc AS |
12025 | |
12026 | return fn_type; | |
12027 | } | |
669ec2b4 | 12028 | |
cb753e49 | 12029 | /* Return truthvalue if we're processing a template different from |
dc957d14 | 12030 | the last one involved in diagnostics. */ |
cb753e49 | 12031 | int |
3a978d72 | 12032 | problematic_instantiation_changed (void) |
cb753e49 GDR |
12033 | { |
12034 | return last_template_error_tick != tinst_level_tick; | |
12035 | } | |
12036 | ||
12037 | /* Remember current template involved in diagnostics. */ | |
12038 | void | |
3a978d72 | 12039 | record_last_problematic_instantiation (void) |
cb753e49 GDR |
12040 | { |
12041 | last_template_error_tick = tinst_level_tick; | |
12042 | } | |
12043 | ||
12044 | tree | |
3a978d72 | 12045 | current_instantiation (void) |
cb753e49 GDR |
12046 | { |
12047 | return current_tinst_level; | |
12048 | } | |
db3f4e4e NS |
12049 | |
12050 | /* [temp.param] Check that template non-type parm TYPE is of an allowable | |
838dfd8a | 12051 | type. Return zero for ok, nonzero for disallowed. Issue error and |
c2ea3a40 | 12052 | warning messages under control of COMPLAIN. */ |
db3f4e4e NS |
12053 | |
12054 | static int | |
3a978d72 | 12055 | invalid_nontype_parm_type_p (tree type, tsubst_flags_t complain) |
db3f4e4e NS |
12056 | { |
12057 | if (INTEGRAL_TYPE_P (type)) | |
12058 | return 0; | |
12059 | else if (POINTER_TYPE_P (type)) | |
12060 | return 0; | |
a5ac359a | 12061 | else if (TYPE_PTR_TO_MEMBER_P (type)) |
db3f4e4e | 12062 | return 0; |
db3f4e4e NS |
12063 | else if (TREE_CODE (type) == TEMPLATE_TYPE_PARM) |
12064 | return 0; | |
12065 | else if (TREE_CODE (type) == TYPENAME_TYPE) | |
12066 | return 0; | |
c8094d83 | 12067 | |
c2ea3a40 | 12068 | if (complain & tf_error) |
0f51ccfc | 12069 | error ("%q#T is not a valid type for a template constant parameter", type); |
db3f4e4e NS |
12070 | return 1; |
12071 | } | |
e2500fed | 12072 | |
5552b43c MM |
12073 | /* Returns TRUE if TYPE is dependent, in the sense of [temp.dep.type]. |
12074 | Assumes that TYPE really is a type, and not the ERROR_MARK_NODE.*/ | |
1fb3244a | 12075 | |
5552b43c MM |
12076 | static bool |
12077 | dependent_type_p_r (tree type) | |
1fb3244a MM |
12078 | { |
12079 | tree scope; | |
12080 | ||
1fb3244a MM |
12081 | /* [temp.dep.type] |
12082 | ||
12083 | A type is dependent if it is: | |
12084 | ||
6615c446 JO |
12085 | -- a template parameter. Template template parameters are types |
12086 | for us (since TYPE_P holds true for them) so we handle | |
12087 | them here. */ | |
c8094d83 | 12088 | if (TREE_CODE (type) == TEMPLATE_TYPE_PARM |
6bf92cb6 | 12089 | || TREE_CODE (type) == TEMPLATE_TEMPLATE_PARM) |
1fb3244a MM |
12090 | return true; |
12091 | /* -- a qualified-id with a nested-name-specifier which contains a | |
0cbd7506 | 12092 | class-name that names a dependent type or whose unqualified-id |
1fb3244a MM |
12093 | names a dependent type. */ |
12094 | if (TREE_CODE (type) == TYPENAME_TYPE) | |
12095 | return true; | |
12096 | /* -- a cv-qualified type where the cv-unqualified type is | |
0cbd7506 | 12097 | dependent. */ |
1fb3244a MM |
12098 | type = TYPE_MAIN_VARIANT (type); |
12099 | /* -- a compound type constructed from any dependent type. */ | |
a5ac359a | 12100 | if (TYPE_PTR_TO_MEMBER_P (type)) |
1fb3244a | 12101 | return (dependent_type_p (TYPE_PTRMEM_CLASS_TYPE (type)) |
c8094d83 | 12102 | || dependent_type_p (TYPE_PTRMEM_POINTED_TO_TYPE |
1fb3244a MM |
12103 | (type))); |
12104 | else if (TREE_CODE (type) == POINTER_TYPE | |
12105 | || TREE_CODE (type) == REFERENCE_TYPE) | |
12106 | return dependent_type_p (TREE_TYPE (type)); | |
12107 | else if (TREE_CODE (type) == FUNCTION_TYPE | |
12108 | || TREE_CODE (type) == METHOD_TYPE) | |
12109 | { | |
12110 | tree arg_type; | |
12111 | ||
12112 | if (dependent_type_p (TREE_TYPE (type))) | |
12113 | return true; | |
c8094d83 MS |
12114 | for (arg_type = TYPE_ARG_TYPES (type); |
12115 | arg_type; | |
1fb3244a MM |
12116 | arg_type = TREE_CHAIN (arg_type)) |
12117 | if (dependent_type_p (TREE_VALUE (arg_type))) | |
12118 | return true; | |
12119 | return false; | |
12120 | } | |
12121 | /* -- an array type constructed from any dependent type or whose | |
0cbd7506 | 12122 | size is specified by a constant expression that is |
1fb3244a MM |
12123 | value-dependent. */ |
12124 | if (TREE_CODE (type) == ARRAY_TYPE) | |
12125 | { | |
12126 | if (TYPE_DOMAIN (type) | |
c8094d83 | 12127 | && ((value_dependent_expression_p |
1fb3244a MM |
12128 | (TYPE_MAX_VALUE (TYPE_DOMAIN (type)))) |
12129 | || (type_dependent_expression_p | |
12130 | (TYPE_MAX_VALUE (TYPE_DOMAIN (type)))))) | |
12131 | return true; | |
12132 | return dependent_type_p (TREE_TYPE (type)); | |
12133 | } | |
c8094d83 | 12134 | |
1fb3244a | 12135 | /* -- a template-id in which either the template name is a template |
86306a6b NS |
12136 | parameter ... */ |
12137 | if (TREE_CODE (type) == BOUND_TEMPLATE_TEMPLATE_PARM) | |
1fb3244a | 12138 | return true; |
86306a6b | 12139 | /* ... or any of the template arguments is a dependent type or |
04c06002 | 12140 | an expression that is type-dependent or value-dependent. */ |
86306a6b | 12141 | else if (CLASS_TYPE_P (type) && CLASSTYPE_TEMPLATE_INFO (type) |
c8094d83 | 12142 | && (any_dependent_template_arguments_p |
7e99327d | 12143 | (INNERMOST_TEMPLATE_ARGS (CLASSTYPE_TI_ARGS (type))))) |
1fb3244a | 12144 | return true; |
c8094d83 | 12145 | |
1fb3244a MM |
12146 | /* All TYPEOF_TYPEs are dependent; if the argument of the `typeof' |
12147 | expression is not type-dependent, then it should already been | |
12148 | have resolved. */ | |
12149 | if (TREE_CODE (type) == TYPEOF_TYPE) | |
12150 | return true; | |
c8094d83 | 12151 | |
1fb3244a MM |
12152 | /* The standard does not specifically mention types that are local |
12153 | to template functions or local classes, but they should be | |
12154 | considered dependent too. For example: | |
12155 | ||
c8094d83 | 12156 | template <int I> void f() { |
0cbd7506 | 12157 | enum E { a = I }; |
1fb3244a MM |
12158 | S<sizeof (E)> s; |
12159 | } | |
12160 | ||
12161 | The size of `E' cannot be known until the value of `I' has been | |
12162 | determined. Therefore, `E' must be considered dependent. */ | |
12163 | scope = TYPE_CONTEXT (type); | |
12164 | if (scope && TYPE_P (scope)) | |
12165 | return dependent_type_p (scope); | |
12166 | else if (scope && TREE_CODE (scope) == FUNCTION_DECL) | |
12167 | return type_dependent_expression_p (scope); | |
12168 | ||
12169 | /* Other types are non-dependent. */ | |
12170 | return false; | |
12171 | } | |
12172 | ||
5552b43c MM |
12173 | /* Returns TRUE if TYPE is dependent, in the sense of |
12174 | [temp.dep.type]. */ | |
12175 | ||
12176 | bool | |
12177 | dependent_type_p (tree type) | |
12178 | { | |
12179 | /* If there are no template parameters in scope, then there can't be | |
12180 | any dependent types. */ | |
12181 | if (!processing_template_decl) | |
12182 | return false; | |
12183 | ||
12184 | /* If the type is NULL, we have not computed a type for the entity | |
12185 | in question; in that case, the type is dependent. */ | |
12186 | if (!type) | |
12187 | return true; | |
12188 | ||
12189 | /* Erroneous types can be considered non-dependent. */ | |
12190 | if (type == error_mark_node) | |
12191 | return false; | |
12192 | ||
12193 | /* If we have not already computed the appropriate value for TYPE, | |
12194 | do so now. */ | |
12195 | if (!TYPE_DEPENDENT_P_VALID (type)) | |
12196 | { | |
12197 | TYPE_DEPENDENT_P (type) = dependent_type_p_r (type); | |
12198 | TYPE_DEPENDENT_P_VALID (type) = 1; | |
12199 | } | |
12200 | ||
12201 | return TYPE_DEPENDENT_P (type); | |
12202 | } | |
12203 | ||
8d83f792 MM |
12204 | /* Returns TRUE if EXPRESSION is dependent, according to CRITERION. */ |
12205 | ||
12206 | static bool | |
12207 | dependent_scope_ref_p (tree expression, bool criterion (tree)) | |
12208 | { | |
12209 | tree scope; | |
12210 | tree name; | |
12211 | ||
50bc768d | 12212 | gcc_assert (TREE_CODE (expression) == SCOPE_REF); |
8d83f792 MM |
12213 | |
12214 | if (!TYPE_P (TREE_OPERAND (expression, 0))) | |
12215 | return true; | |
12216 | ||
12217 | scope = TREE_OPERAND (expression, 0); | |
12218 | name = TREE_OPERAND (expression, 1); | |
12219 | ||
12220 | /* [temp.dep.expr] | |
12221 | ||
12222 | An id-expression is type-dependent if it contains a | |
12223 | nested-name-specifier that contains a class-name that names a | |
12224 | dependent type. */ | |
12225 | /* The suggested resolution to Core Issue 2 implies that if the | |
12226 | qualifying type is the current class, then we must peek | |
12227 | inside it. */ | |
c8094d83 | 12228 | if (DECL_P (name) |
8d83f792 MM |
12229 | && currently_open_class (scope) |
12230 | && !criterion (name)) | |
12231 | return false; | |
12232 | if (dependent_type_p (scope)) | |
12233 | return true; | |
12234 | ||
12235 | return false; | |
12236 | } | |
12237 | ||
20929c7f GB |
12238 | /* Returns TRUE if the EXPRESSION is value-dependent, in the sense of |
12239 | [temp.dep.constexpr] */ | |
1fb3244a | 12240 | |
14d22dd6 | 12241 | bool |
1fb3244a MM |
12242 | value_dependent_expression_p (tree expression) |
12243 | { | |
12244 | if (!processing_template_decl) | |
12245 | return false; | |
12246 | ||
12247 | /* A name declared with a dependent type. */ | |
7416ab02 | 12248 | if (DECL_P (expression) && type_dependent_expression_p (expression)) |
1fb3244a | 12249 | return true; |
c8094d83 | 12250 | |
7416ab02 NS |
12251 | switch (TREE_CODE (expression)) |
12252 | { | |
12253 | case IDENTIFIER_NODE: | |
12254 | /* A name that has not been looked up -- must be dependent. */ | |
12255 | return true; | |
12256 | ||
12257 | case TEMPLATE_PARM_INDEX: | |
12258 | /* A non-type template parm. */ | |
12259 | return true; | |
12260 | ||
12261 | case CONST_DECL: | |
12262 | /* A non-type template parm. */ | |
12263 | if (DECL_TEMPLATE_PARM_P (expression)) | |
d17811fd | 12264 | return true; |
7416ab02 | 12265 | return false; |
d36d5600 | 12266 | |
7416ab02 | 12267 | case VAR_DECL: |
c8094d83 | 12268 | /* A constant with integral or enumeration type and is initialized |
0cbd7506 | 12269 | with an expression that is value-dependent. */ |
7416ab02 NS |
12270 | if (DECL_INITIAL (expression) |
12271 | && INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (expression)) | |
12272 | && value_dependent_expression_p (DECL_INITIAL (expression))) | |
12273 | return true; | |
12274 | return false; | |
12275 | ||
12276 | case DYNAMIC_CAST_EXPR: | |
12277 | case STATIC_CAST_EXPR: | |
12278 | case CONST_CAST_EXPR: | |
12279 | case REINTERPRET_CAST_EXPR: | |
12280 | case CAST_EXPR: | |
12281 | /* These expressions are value-dependent if the type to which | |
0cbd7506 MS |
12282 | the cast occurs is dependent or the expression being casted |
12283 | is value-dependent. */ | |
7416ab02 NS |
12284 | { |
12285 | tree type = TREE_TYPE (expression); | |
c8094d83 | 12286 | |
7416ab02 NS |
12287 | if (dependent_type_p (type)) |
12288 | return true; | |
c8094d83 | 12289 | |
7416ab02 NS |
12290 | /* A functional cast has a list of operands. */ |
12291 | expression = TREE_OPERAND (expression, 0); | |
12292 | if (!expression) | |
12293 | { | |
12294 | /* If there are no operands, it must be an expression such | |
12295 | as "int()". This should not happen for aggregate types | |
12296 | because it would form non-constant expressions. */ | |
12297 | gcc_assert (INTEGRAL_OR_ENUMERATION_TYPE_P (type)); | |
c8094d83 | 12298 | |
7416ab02 NS |
12299 | return false; |
12300 | } | |
c8094d83 | 12301 | |
7416ab02 NS |
12302 | if (TREE_CODE (expression) == TREE_LIST) |
12303 | { | |
12304 | for (; expression; expression = TREE_CHAIN (expression)) | |
d17811fd MM |
12305 | if (value_dependent_expression_p (TREE_VALUE (expression))) |
12306 | return true; | |
7416ab02 NS |
12307 | return false; |
12308 | } | |
c8094d83 | 12309 | |
d17811fd | 12310 | return value_dependent_expression_p (expression); |
7416ab02 | 12311 | } |
c8094d83 | 12312 | |
7416ab02 NS |
12313 | case SIZEOF_EXPR: |
12314 | case ALIGNOF_EXPR: | |
12315 | /* A `sizeof' expression is value-dependent if the operand is | |
0cbd7506 | 12316 | type-dependent. */ |
d17811fd MM |
12317 | expression = TREE_OPERAND (expression, 0); |
12318 | if (TYPE_P (expression)) | |
12319 | return dependent_type_p (expression); | |
12320 | return type_dependent_expression_p (expression); | |
100d337a | 12321 | |
7416ab02 NS |
12322 | case SCOPE_REF: |
12323 | return dependent_scope_ref_p (expression, value_dependent_expression_p); | |
100d337a | 12324 | |
7416ab02 NS |
12325 | case COMPONENT_REF: |
12326 | return (value_dependent_expression_p (TREE_OPERAND (expression, 0)) | |
12327 | || value_dependent_expression_p (TREE_OPERAND (expression, 1))); | |
12328 | ||
12329 | case CALL_EXPR: | |
12330 | /* A CALL_EXPR is value-dependent if any argument is | |
0cbd7506 MS |
12331 | value-dependent. Why do we have to handle CALL_EXPRs in this |
12332 | function at all? First, some function calls, those for which | |
12333 | value_dependent_expression_p is true, man appear in constant | |
12334 | expressions. Second, there appear to be bugs which result in | |
12335 | other CALL_EXPRs reaching this point. */ | |
7416ab02 NS |
12336 | { |
12337 | tree function = TREE_OPERAND (expression, 0); | |
12338 | tree args = TREE_OPERAND (expression, 1); | |
c8094d83 | 12339 | |
7416ab02 NS |
12340 | if (value_dependent_expression_p (function)) |
12341 | return true; | |
c8094d83 | 12342 | |
7416ab02 NS |
12343 | if (! args) |
12344 | return false; | |
c8094d83 | 12345 | |
7416ab02 NS |
12346 | if (TREE_CODE (args) == TREE_LIST) |
12347 | { | |
12348 | for (; args; args = TREE_CHAIN (args)) | |
100d337a MA |
12349 | if (value_dependent_expression_p (TREE_VALUE (args))) |
12350 | return true; | |
7416ab02 NS |
12351 | return false; |
12352 | } | |
c8094d83 | 12353 | |
100d337a | 12354 | return value_dependent_expression_p (args); |
7416ab02 NS |
12355 | } |
12356 | ||
12357 | default: | |
12358 | /* A constant expression is value-dependent if any subexpression is | |
0cbd7506 | 12359 | value-dependent. */ |
1fb3244a MM |
12360 | switch (TREE_CODE_CLASS (TREE_CODE (expression))) |
12361 | { | |
7416ab02 | 12362 | case tcc_reference: |
6615c446 | 12363 | case tcc_unary: |
c8094d83 | 12364 | return (value_dependent_expression_p |
1fb3244a | 12365 | (TREE_OPERAND (expression, 0))); |
c8094d83 | 12366 | |
6615c446 JO |
12367 | case tcc_comparison: |
12368 | case tcc_binary: | |
c8094d83 | 12369 | return ((value_dependent_expression_p |
1fb3244a | 12370 | (TREE_OPERAND (expression, 0))) |
c8094d83 | 12371 | || (value_dependent_expression_p |
1fb3244a | 12372 | (TREE_OPERAND (expression, 1)))); |
c8094d83 | 12373 | |
6615c446 | 12374 | case tcc_expression: |
1fb3244a MM |
12375 | { |
12376 | int i; | |
54e4aedb | 12377 | for (i = 0; i < TREE_CODE_LENGTH (TREE_CODE (expression)); ++i) |
14d22dd6 MM |
12378 | /* In some cases, some of the operands may be missing. |
12379 | (For example, in the case of PREDECREMENT_EXPR, the | |
12380 | amount to increment by may be missing.) That doesn't | |
12381 | make the expression dependent. */ | |
12382 | if (TREE_OPERAND (expression, i) | |
12383 | && (value_dependent_expression_p | |
12384 | (TREE_OPERAND (expression, i)))) | |
1fb3244a MM |
12385 | return true; |
12386 | return false; | |
12387 | } | |
c8094d83 | 12388 | |
6615c446 | 12389 | default: |
7416ab02 | 12390 | break; |
1fb3244a MM |
12391 | } |
12392 | } | |
c8094d83 | 12393 | |
1fb3244a MM |
12394 | /* The expression is not value-dependent. */ |
12395 | return false; | |
12396 | } | |
12397 | ||
12398 | /* Returns TRUE if the EXPRESSION is type-dependent, in the sense of | |
12399 | [temp.dep.expr]. */ | |
12400 | ||
12401 | bool | |
3a978d72 | 12402 | type_dependent_expression_p (tree expression) |
1fb3244a MM |
12403 | { |
12404 | if (!processing_template_decl) | |
12405 | return false; | |
12406 | ||
7efa3e22 NS |
12407 | if (expression == error_mark_node) |
12408 | return false; | |
10b1d5e7 MM |
12409 | |
12410 | /* An unresolved name is always dependent. */ | |
12411 | if (TREE_CODE (expression) == IDENTIFIER_NODE) | |
12412 | return true; | |
c8094d83 | 12413 | |
1fb3244a MM |
12414 | /* Some expression forms are never type-dependent. */ |
12415 | if (TREE_CODE (expression) == PSEUDO_DTOR_EXPR | |
12416 | || TREE_CODE (expression) == SIZEOF_EXPR | |
12417 | || TREE_CODE (expression) == ALIGNOF_EXPR | |
12418 | || TREE_CODE (expression) == TYPEID_EXPR | |
12419 | || TREE_CODE (expression) == DELETE_EXPR | |
12420 | || TREE_CODE (expression) == VEC_DELETE_EXPR | |
12421 | || TREE_CODE (expression) == THROW_EXPR) | |
12422 | return false; | |
12423 | ||
12424 | /* The types of these expressions depends only on the type to which | |
12425 | the cast occurs. */ | |
12426 | if (TREE_CODE (expression) == DYNAMIC_CAST_EXPR | |
12427 | || TREE_CODE (expression) == STATIC_CAST_EXPR | |
12428 | || TREE_CODE (expression) == CONST_CAST_EXPR | |
12429 | || TREE_CODE (expression) == REINTERPRET_CAST_EXPR | |
12430 | || TREE_CODE (expression) == CAST_EXPR) | |
12431 | return dependent_type_p (TREE_TYPE (expression)); | |
d17811fd | 12432 | |
1fb3244a MM |
12433 | /* The types of these expressions depends only on the type created |
12434 | by the expression. */ | |
d17811fd MM |
12435 | if (TREE_CODE (expression) == NEW_EXPR |
12436 | || TREE_CODE (expression) == VEC_NEW_EXPR) | |
09d2f85f KL |
12437 | { |
12438 | /* For NEW_EXPR tree nodes created inside a template, either | |
12439 | the object type itself or a TREE_LIST may appear as the | |
12440 | operand 1. */ | |
12441 | tree type = TREE_OPERAND (expression, 1); | |
12442 | if (TREE_CODE (type) == TREE_LIST) | |
12443 | /* This is an array type. We need to check array dimensions | |
12444 | as well. */ | |
12445 | return dependent_type_p (TREE_VALUE (TREE_PURPOSE (type))) | |
12446 | || value_dependent_expression_p | |
12447 | (TREE_OPERAND (TREE_VALUE (type), 1)); | |
12448 | else | |
12449 | return dependent_type_p (type); | |
12450 | } | |
1fb3244a | 12451 | |
5a57f1b2 JM |
12452 | if (TREE_CODE (expression) == SCOPE_REF |
12453 | && dependent_scope_ref_p (expression, | |
12454 | type_dependent_expression_p)) | |
12455 | return true; | |
12456 | ||
12457 | if (TREE_CODE (expression) == FUNCTION_DECL | |
12458 | && DECL_LANG_SPECIFIC (expression) | |
12459 | && DECL_TEMPLATE_INFO (expression) | |
12460 | && (any_dependent_template_arguments_p | |
12461 | (INNERMOST_TEMPLATE_ARGS (DECL_TI_ARGS (expression))))) | |
12462 | return true; | |
12463 | ||
12464 | if (TREE_CODE (expression) == TEMPLATE_DECL | |
12465 | && !DECL_TEMPLATE_TEMPLATE_PARM_P (expression)) | |
12466 | return false; | |
12467 | ||
d17811fd MM |
12468 | if (TREE_TYPE (expression) == unknown_type_node) |
12469 | { | |
12470 | if (TREE_CODE (expression) == ADDR_EXPR) | |
12471 | return type_dependent_expression_p (TREE_OPERAND (expression, 0)); | |
c353b8e3 MM |
12472 | if (TREE_CODE (expression) == COMPONENT_REF |
12473 | || TREE_CODE (expression) == OFFSET_REF) | |
6cb89308 NS |
12474 | { |
12475 | if (type_dependent_expression_p (TREE_OPERAND (expression, 0))) | |
12476 | return true; | |
12477 | expression = TREE_OPERAND (expression, 1); | |
12478 | if (TREE_CODE (expression) == IDENTIFIER_NODE) | |
12479 | return false; | |
12480 | } | |
3601f003 KL |
12481 | /* SCOPE_REF with non-null TREE_TYPE is always non-dependent. */ |
12482 | if (TREE_CODE (expression) == SCOPE_REF) | |
12483 | return false; | |
c8094d83 | 12484 | |
d17811fd MM |
12485 | if (TREE_CODE (expression) == BASELINK) |
12486 | expression = BASELINK_FUNCTIONS (expression); | |
c8094d83 | 12487 | |
d17811fd MM |
12488 | if (TREE_CODE (expression) == TEMPLATE_ID_EXPR) |
12489 | { | |
ee3071ef NS |
12490 | if (any_dependent_template_arguments_p |
12491 | (TREE_OPERAND (expression, 1))) | |
d17811fd MM |
12492 | return true; |
12493 | expression = TREE_OPERAND (expression, 0); | |
12494 | } | |
b207d6e2 MM |
12495 | gcc_assert (TREE_CODE (expression) == OVERLOAD |
12496 | || TREE_CODE (expression) == FUNCTION_DECL); | |
c8094d83 | 12497 | |
315fb5db | 12498 | while (expression) |
d17811fd | 12499 | { |
315fb5db NS |
12500 | if (type_dependent_expression_p (OVL_CURRENT (expression))) |
12501 | return true; | |
12502 | expression = OVL_NEXT (expression); | |
d17811fd | 12503 | } |
315fb5db | 12504 | return false; |
d17811fd | 12505 | } |
c8094d83 | 12506 | |
3ce5fa4f NS |
12507 | gcc_assert (TREE_CODE (expression) != TYPE_DECL); |
12508 | ||
1fb3244a MM |
12509 | return (dependent_type_p (TREE_TYPE (expression))); |
12510 | } | |
12511 | ||
d17811fd MM |
12512 | /* Returns TRUE if ARGS (a TREE_LIST of arguments to a function call) |
12513 | contains a type-dependent expression. */ | |
1fb3244a MM |
12514 | |
12515 | bool | |
d17811fd MM |
12516 | any_type_dependent_arguments_p (tree args) |
12517 | { | |
12518 | while (args) | |
12519 | { | |
7efa3e22 NS |
12520 | tree arg = TREE_VALUE (args); |
12521 | ||
12522 | if (type_dependent_expression_p (arg)) | |
d17811fd MM |
12523 | return true; |
12524 | args = TREE_CHAIN (args); | |
12525 | } | |
12526 | return false; | |
12527 | } | |
12528 | ||
12529 | /* Returns TRUE if the ARG (a template argument) is dependent. */ | |
12530 | ||
12531 | static bool | |
1fb3244a MM |
12532 | dependent_template_arg_p (tree arg) |
12533 | { | |
12534 | if (!processing_template_decl) | |
12535 | return false; | |
12536 | ||
12537 | if (TREE_CODE (arg) == TEMPLATE_DECL | |
12538 | || TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM) | |
12539 | return dependent_template_p (arg); | |
12540 | else if (TYPE_P (arg)) | |
12541 | return dependent_type_p (arg); | |
12542 | else | |
12543 | return (type_dependent_expression_p (arg) | |
12544 | || value_dependent_expression_p (arg)); | |
12545 | } | |
12546 | ||
d17811fd MM |
12547 | /* Returns true if ARGS (a collection of template arguments) contains |
12548 | any dependent arguments. */ | |
1fb3244a | 12549 | |
d17811fd MM |
12550 | bool |
12551 | any_dependent_template_arguments_p (tree args) | |
1fb3244a | 12552 | { |
bf12d54d | 12553 | int i; |
c353b8e3 MM |
12554 | int j; |
12555 | ||
d17811fd MM |
12556 | if (!args) |
12557 | return false; | |
12558 | ||
c353b8e3 MM |
12559 | for (i = 0; i < TMPL_ARGS_DEPTH (args); ++i) |
12560 | { | |
12561 | tree level = TMPL_ARGS_LEVEL (args, i + 1); | |
12562 | for (j = 0; j < TREE_VEC_LENGTH (level); ++j) | |
12563 | if (dependent_template_arg_p (TREE_VEC_ELT (level, j))) | |
12564 | return true; | |
12565 | } | |
1fb3244a | 12566 | |
1fb3244a MM |
12567 | return false; |
12568 | } | |
12569 | ||
12570 | /* Returns TRUE if the template TMPL is dependent. */ | |
12571 | ||
12572 | bool | |
12573 | dependent_template_p (tree tmpl) | |
12574 | { | |
b95cc51a MM |
12575 | if (TREE_CODE (tmpl) == OVERLOAD) |
12576 | { | |
12577 | while (tmpl) | |
12578 | { | |
12579 | if (dependent_template_p (OVL_FUNCTION (tmpl))) | |
12580 | return true; | |
12581 | tmpl = OVL_CHAIN (tmpl); | |
12582 | } | |
12583 | return false; | |
12584 | } | |
12585 | ||
1fb3244a MM |
12586 | /* Template template parameters are dependent. */ |
12587 | if (DECL_TEMPLATE_TEMPLATE_PARM_P (tmpl) | |
12588 | || TREE_CODE (tmpl) == TEMPLATE_TEMPLATE_PARM) | |
12589 | return true; | |
27ab0504 | 12590 | /* So are names that have not been looked up. */ |
acccf788 MM |
12591 | if (TREE_CODE (tmpl) == SCOPE_REF |
12592 | || TREE_CODE (tmpl) == IDENTIFIER_NODE) | |
d17811fd | 12593 | return true; |
1fb3244a MM |
12594 | /* So are member templates of dependent classes. */ |
12595 | if (TYPE_P (CP_DECL_CONTEXT (tmpl))) | |
12596 | return dependent_type_p (DECL_CONTEXT (tmpl)); | |
12597 | return false; | |
12598 | } | |
12599 | ||
d17811fd MM |
12600 | /* Returns TRUE if the specialization TMPL<ARGS> is dependent. */ |
12601 | ||
12602 | bool | |
12603 | dependent_template_id_p (tree tmpl, tree args) | |
12604 | { | |
12605 | return (dependent_template_p (tmpl) | |
12606 | || any_dependent_template_arguments_p (args)); | |
12607 | } | |
12608 | ||
14d22dd6 MM |
12609 | /* TYPE is a TYPENAME_TYPE. Returns the ordinary TYPE to which the |
12610 | TYPENAME_TYPE corresponds. Returns ERROR_MARK_NODE if no such TYPE | |
12611 | can be found. Note that this function peers inside uninstantiated | |
12612 | templates and therefore should be used only in extremely limited | |
dda04398 | 12613 | situations. ONLY_CURRENT_P restricts this peering to the currently |
c51940a2 | 12614 | open classes hierarchy (which is required when comparing types). */ |
14d22dd6 MM |
12615 | |
12616 | tree | |
12617 | resolve_typename_type (tree type, bool only_current_p) | |
12618 | { | |
12619 | tree scope; | |
12620 | tree name; | |
12621 | tree decl; | |
12622 | int quals; | |
4514aa8c | 12623 | tree pushed_scope; |
14d22dd6 | 12624 | |
50bc768d | 12625 | gcc_assert (TREE_CODE (type) == TYPENAME_TYPE); |
14d22dd6 MM |
12626 | |
12627 | scope = TYPE_CONTEXT (type); | |
12628 | name = TYPE_IDENTIFIER (type); | |
12629 | ||
12630 | /* If the SCOPE is itself a TYPENAME_TYPE, then we need to resolve | |
12631 | it first before we can figure out what NAME refers to. */ | |
12632 | if (TREE_CODE (scope) == TYPENAME_TYPE) | |
12633 | scope = resolve_typename_type (scope, only_current_p); | |
12634 | /* If we don't know what SCOPE refers to, then we cannot resolve the | |
12635 | TYPENAME_TYPE. */ | |
12636 | if (scope == error_mark_node || TREE_CODE (scope) == TYPENAME_TYPE) | |
12637 | return error_mark_node; | |
12638 | /* If the SCOPE is a template type parameter, we have no way of | |
12639 | resolving the name. */ | |
12640 | if (TREE_CODE (scope) == TEMPLATE_TYPE_PARM) | |
12641 | return type; | |
12642 | /* If the SCOPE is not the current instantiation, there's no reason | |
12643 | to look inside it. */ | |
12644 | if (only_current_p && !currently_open_class (scope)) | |
12645 | return error_mark_node; | |
ca099ac8 MM |
12646 | /* If SCOPE is a partial instantiation, it will not have a valid |
12647 | TYPE_FIELDS list, so use the original template. */ | |
353b4fc0 | 12648 | scope = CLASSTYPE_PRIMARY_TEMPLATE_TYPE (scope); |
14d22dd6 MM |
12649 | /* Enter the SCOPE so that name lookup will be resolved as if we |
12650 | were in the class definition. In particular, SCOPE will no | |
12651 | longer be considered a dependent type. */ | |
4514aa8c | 12652 | pushed_scope = push_scope (scope); |
14d22dd6 | 12653 | /* Look up the declaration. */ |
86ac0575 | 12654 | decl = lookup_member (scope, name, /*protect=*/0, /*want_type=*/true); |
14d22dd6 MM |
12655 | /* Obtain the set of qualifiers applied to the TYPE. */ |
12656 | quals = cp_type_quals (type); | |
12657 | /* For a TYPENAME_TYPE like "typename X::template Y<T>", we want to | |
12658 | find a TEMPLATE_DECL. Otherwise, we want to find a TYPE_DECL. */ | |
12659 | if (!decl) | |
12660 | type = error_mark_node; | |
12661 | else if (TREE_CODE (TYPENAME_TYPE_FULLNAME (type)) == IDENTIFIER_NODE | |
12662 | && TREE_CODE (decl) == TYPE_DECL) | |
12663 | type = TREE_TYPE (decl); | |
12664 | else if (TREE_CODE (TYPENAME_TYPE_FULLNAME (type)) == TEMPLATE_ID_EXPR | |
12665 | && DECL_CLASS_TEMPLATE_P (decl)) | |
12666 | { | |
12667 | tree tmpl; | |
12668 | tree args; | |
12669 | /* Obtain the template and the arguments. */ | |
12670 | tmpl = TREE_OPERAND (TYPENAME_TYPE_FULLNAME (type), 0); | |
12671 | args = TREE_OPERAND (TYPENAME_TYPE_FULLNAME (type), 1); | |
12672 | /* Instantiate the template. */ | |
12673 | type = lookup_template_class (tmpl, args, NULL_TREE, NULL_TREE, | |
42eaed49 | 12674 | /*entering_scope=*/0, tf_error | tf_user); |
14d22dd6 MM |
12675 | } |
12676 | else | |
12677 | type = error_mark_node; | |
12678 | /* Qualify the resulting type. */ | |
12679 | if (type != error_mark_node && quals) | |
12680 | type = cp_build_qualified_type (type, quals); | |
12681 | /* Leave the SCOPE. */ | |
4514aa8c NS |
12682 | if (pushed_scope) |
12683 | pop_scope (pushed_scope); | |
14d22dd6 MM |
12684 | |
12685 | return type; | |
12686 | } | |
12687 | ||
d17811fd MM |
12688 | /* EXPR is an expression which is not type-dependent. Return a proxy |
12689 | for EXPR that can be used to compute the types of larger | |
12690 | expressions containing EXPR. */ | |
12691 | ||
12692 | tree | |
12693 | build_non_dependent_expr (tree expr) | |
12694 | { | |
0deb916c MM |
12695 | tree inner_expr; |
12696 | ||
c8094d83 | 12697 | /* Preserve null pointer constants so that the type of things like |
d17811fd MM |
12698 | "p == 0" where "p" is a pointer can be determined. */ |
12699 | if (null_ptr_cst_p (expr)) | |
12700 | return expr; | |
12701 | /* Preserve OVERLOADs; the functions must be available to resolve | |
12702 | types. */ | |
c8094d83 | 12703 | inner_expr = (TREE_CODE (expr) == ADDR_EXPR ? |
fdeff563 NS |
12704 | TREE_OPERAND (expr, 0) : |
12705 | TREE_CODE (expr) == COMPONENT_REF ? | |
12706 | TREE_OPERAND (expr, 1) : expr); | |
2226e997 | 12707 | if (is_overloaded_fn (inner_expr) |
6439fffd | 12708 | || TREE_CODE (inner_expr) == OFFSET_REF) |
d17811fd | 12709 | return expr; |
5ae9ba3e MM |
12710 | /* There is no need to return a proxy for a variable. */ |
12711 | if (TREE_CODE (expr) == VAR_DECL) | |
12712 | return expr; | |
7433e6d4 MM |
12713 | /* Preserve string constants; conversions from string constants to |
12714 | "char *" are allowed, even though normally a "const char *" | |
12715 | cannot be used to initialize a "char *". */ | |
12716 | if (TREE_CODE (expr) == STRING_CST) | |
12717 | return expr; | |
b7c707d1 MM |
12718 | /* Preserve arithmetic constants, as an optimization -- there is no |
12719 | reason to create a new node. */ | |
12720 | if (TREE_CODE (expr) == INTEGER_CST || TREE_CODE (expr) == REAL_CST) | |
12721 | return expr; | |
9b7be7b5 MM |
12722 | /* Preserve THROW_EXPRs -- all throw-expressions have type "void". |
12723 | There is at least one place where we want to know that a | |
12724 | particular expression is a throw-expression: when checking a ?: | |
12725 | expression, there are special rules if the second or third | |
878cbb73 | 12726 | argument is a throw-expression. */ |
9b7be7b5 MM |
12727 | if (TREE_CODE (expr) == THROW_EXPR) |
12728 | return expr; | |
47d4c811 NS |
12729 | |
12730 | if (TREE_CODE (expr) == COND_EXPR) | |
f293ce4b RS |
12731 | return build3 (COND_EXPR, |
12732 | TREE_TYPE (expr), | |
12733 | TREE_OPERAND (expr, 0), | |
c8094d83 | 12734 | (TREE_OPERAND (expr, 1) |
f293ce4b RS |
12735 | ? build_non_dependent_expr (TREE_OPERAND (expr, 1)) |
12736 | : build_non_dependent_expr (TREE_OPERAND (expr, 0))), | |
12737 | build_non_dependent_expr (TREE_OPERAND (expr, 2))); | |
8e1daa34 NS |
12738 | if (TREE_CODE (expr) == COMPOUND_EXPR |
12739 | && !COMPOUND_EXPR_OVERLOADED (expr)) | |
f293ce4b RS |
12740 | return build2 (COMPOUND_EXPR, |
12741 | TREE_TYPE (expr), | |
12742 | TREE_OPERAND (expr, 0), | |
12743 | build_non_dependent_expr (TREE_OPERAND (expr, 1))); | |
c8094d83 | 12744 | |
fdeff563 NS |
12745 | /* If the type is unknown, it can't really be non-dependent */ |
12746 | gcc_assert (TREE_TYPE (expr) != unknown_type_node); | |
12747 | ||
c8094d83 | 12748 | /* Otherwise, build a NON_DEPENDENT_EXPR. |
d17811fd MM |
12749 | |
12750 | REFERENCE_TYPEs are not stripped for expressions in templates | |
12751 | because doing so would play havoc with mangling. Consider, for | |
12752 | example: | |
12753 | ||
c8094d83 | 12754 | template <typename T> void f<T& g>() { g(); } |
d17811fd MM |
12755 | |
12756 | In the body of "f", the expression for "g" will have | |
12757 | REFERENCE_TYPE, even though the standard says that it should | |
12758 | not. The reason is that we must preserve the syntactic form of | |
12759 | the expression so that mangling (say) "f<g>" inside the body of | |
12760 | "f" works out correctly. Therefore, the REFERENCE_TYPE is | |
12761 | stripped here. */ | |
018a5803 | 12762 | return build1 (NON_DEPENDENT_EXPR, non_reference (TREE_TYPE (expr)), expr); |
d17811fd MM |
12763 | } |
12764 | ||
12765 | /* ARGS is a TREE_LIST of expressions as arguments to a function call. | |
12766 | Return a new TREE_LIST with the various arguments replaced with | |
12767 | equivalent non-dependent expressions. */ | |
12768 | ||
12769 | tree | |
12770 | build_non_dependent_args (tree args) | |
12771 | { | |
12772 | tree a; | |
12773 | tree new_args; | |
12774 | ||
12775 | new_args = NULL_TREE; | |
12776 | for (a = args; a; a = TREE_CHAIN (a)) | |
c8094d83 | 12777 | new_args = tree_cons (NULL_TREE, |
d17811fd MM |
12778 | build_non_dependent_expr (TREE_VALUE (a)), |
12779 | new_args); | |
12780 | return nreverse (new_args); | |
12781 | } | |
12782 | ||
e2500fed | 12783 | #include "gt-cp-pt.h" |