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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, |
cc23546e | 3 | 2001, 2002, 2003 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 |
e9fa0c7c RK |
21 | the Free Software Foundation, 59 Temple Place - Suite 330, |
22 | Boston, MA 02111-1307, 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 MS |
34 | #include "tree.h" |
35 | #include "flags.h" | |
36 | #include "cp-tree.h" | |
25af8512 | 37 | #include "tree-inline.h" |
8d08fdba | 38 | #include "decl.h" |
f0e01782 | 39 | #include "lex.h" |
e8abc66f | 40 | #include "output.h" |
49c249e1 | 41 | #include "except.h" |
54f92bfb | 42 | #include "toplev.h" |
3dcaad8b | 43 | #include "rtl.h" |
297a5329 | 44 | #include "timevar.h" |
49c249e1 | 45 | |
050367a3 MM |
46 | /* The type of functions taking a tree, and some additional data, and |
47 | returning an int. */ | |
158991b7 | 48 | typedef int (*tree_fn_t) PARAMS ((tree, void*)); |
050367a3 | 49 | |
0aafb128 MM |
50 | /* The PENDING_TEMPLATES is a TREE_LIST of templates whose |
51 | instantiations have been deferred, either because their definitions | |
d78e771d ZW |
52 | were not yet available, or because we were putting off doing the work. |
53 | The TREE_PURPOSE of each entry is either a DECL (for a function or | |
54 | static data member), or a TYPE (for a class) indicating what we are | |
55 | hoping to instantiate. The TREE_VALUE is not used. */ | |
e2500fed | 56 | static GTY(()) tree pending_templates; |
13e73b29 | 57 | static GTY(()) tree last_pending_template; |
73aad9b9 | 58 | |
67ffc812 | 59 | int processing_template_parmlist; |
386b8a85 JM |
60 | static int template_header_count; |
61 | ||
e2500fed GK |
62 | static GTY(()) tree saved_trees; |
63 | static GTY(()) varray_type inline_parm_levels; | |
3dcaad8b | 64 | static size_t inline_parm_levels_used; |
75650646 | 65 | |
e2500fed | 66 | static GTY(()) tree current_tinst_level; |
3ae18eaf | 67 | |
2b59fc25 KL |
68 | static GTY(()) tree saved_access_scope; |
69 | ||
6dfbb909 MM |
70 | /* A map from local variable declarations in the body of the template |
71 | presently being instantiated to the corresponding instantiated | |
72 | local variables. */ | |
73 | static htab_t local_specializations; | |
74 | ||
830bfa74 MM |
75 | #define UNIFY_ALLOW_NONE 0 |
76 | #define UNIFY_ALLOW_MORE_CV_QUAL 1 | |
77 | #define UNIFY_ALLOW_LESS_CV_QUAL 2 | |
78 | #define UNIFY_ALLOW_DERIVED 4 | |
161c12b0 | 79 | #define UNIFY_ALLOW_INTEGER 8 |
028d1f20 | 80 | #define UNIFY_ALLOW_OUTER_LEVEL 16 |
62e4a758 NS |
81 | #define UNIFY_ALLOW_OUTER_MORE_CV_QUAL 32 |
82 | #define UNIFY_ALLOW_OUTER_LESS_CV_QUAL 64 | |
d9f818d9 | 83 | #define UNIFY_ALLOW_MAX_CORRECTION 128 |
830bfa74 | 84 | |
4393e105 MM |
85 | #define GTB_VIA_VIRTUAL 1 /* The base class we are examining is |
86 | virtual, or a base class of a virtual | |
87 | base. */ | |
88 | #define GTB_IGNORE_TYPE 2 /* We don't need to try to unify the current | |
89 | type with the desired type. */ | |
90 | ||
2b59fc25 KL |
91 | static void push_access_scope_real PARAMS ((tree, tree, tree)); |
92 | static void push_access_scope PARAMS ((tree)); | |
93 | static void pop_access_scope PARAMS ((tree)); | |
158991b7 | 94 | static int resolve_overloaded_unification PARAMS ((tree, tree, tree, tree, |
c2ea3a40 | 95 | unification_kind_t, int)); |
158991b7 | 96 | static int try_one_overload PARAMS ((tree, tree, tree, tree, tree, |
c2ea3a40 | 97 | unification_kind_t, int)); |
158991b7 KG |
98 | static int unify PARAMS ((tree, tree, tree, tree, int)); |
99 | static void add_pending_template PARAMS ((tree)); | |
3ae18eaf | 100 | static void reopen_tinst_level PARAMS ((tree)); |
158991b7 | 101 | static tree classtype_mangled_name PARAMS ((tree)); |
c2ea3a40 NS |
102 | static char *mangle_class_name_for_template PARAMS ((const char *, |
103 | tree, tree)); | |
fd74ca0b | 104 | static tree tsubst_initializer_list PARAMS ((tree, tree)); |
158991b7 KG |
105 | static int list_eq PARAMS ((tree, tree)); |
106 | static tree get_class_bindings PARAMS ((tree, tree, tree)); | |
c2ea3a40 NS |
107 | static tree coerce_template_parms PARAMS ((tree, tree, tree, |
108 | tsubst_flags_t, int)); | |
158991b7 KG |
109 | static void tsubst_enum PARAMS ((tree, tree, tree)); |
110 | static tree add_to_template_args PARAMS ((tree, tree)); | |
111 | static tree add_outermost_template_args PARAMS ((tree, tree)); | |
3e4a3562 | 112 | static bool check_instantiated_args PARAMS ((tree, tree, tsubst_flags_t)); |
62e4a758 | 113 | static int maybe_adjust_types_for_deduction PARAMS ((unification_kind_t, tree*, |
c2ea3a40 | 114 | tree*)); |
158991b7 | 115 | static int type_unification_real PARAMS ((tree, tree, tree, tree, |
c2ea3a40 | 116 | int, unification_kind_t, int, int)); |
158991b7 KG |
117 | static void note_template_header PARAMS ((int)); |
118 | static tree maybe_fold_nontype_arg PARAMS ((tree)); | |
bd83b409 | 119 | static void maybe_fold_nontype_args PARAMS ((tree)); |
158991b7 | 120 | static tree convert_nontype_argument PARAMS ((tree, tree)); |
c2ea3a40 NS |
121 | static tree convert_template_argument PARAMS ((tree, tree, tree, |
122 | tsubst_flags_t, int, tree)); | |
158991b7 | 123 | static tree get_bindings_overload PARAMS ((tree, tree, tree)); |
4f2c9d7e | 124 | static int for_each_template_parm PARAMS ((tree, tree_fn_t, void*, htab_t)); |
158991b7 KG |
125 | static tree build_template_parm_index PARAMS ((int, int, int, tree, tree)); |
126 | static int inline_needs_template_parms PARAMS ((tree)); | |
127 | static void push_inline_template_parms_recursive PARAMS ((tree, int)); | |
128 | static tree retrieve_specialization PARAMS ((tree, tree)); | |
6dfbb909 | 129 | static tree retrieve_local_specialization PARAMS ((tree)); |
158991b7 | 130 | static tree register_specialization PARAMS ((tree, tree, tree)); |
414ea4aa | 131 | static void register_local_specialization PARAMS ((tree, tree)); |
158991b7 KG |
132 | static int unregister_specialization PARAMS ((tree, tree)); |
133 | static tree reduce_template_parm_level PARAMS ((tree, tree, int)); | |
134 | static tree build_template_decl PARAMS ((tree, tree)); | |
135 | static int mark_template_parm PARAMS ((tree, void *)); | |
5dd236e2 | 136 | static int template_parm_this_level_p PARAMS ((tree, void *)); |
158991b7 KG |
137 | static tree tsubst_friend_function PARAMS ((tree, tree)); |
138 | static tree tsubst_friend_class PARAMS ((tree, tree)); | |
17f29637 | 139 | static int can_complete_type_without_circularity PARAMS ((tree)); |
62e4a758 | 140 | static tree get_bindings_real PARAMS ((tree, tree, tree, int, int, int)); |
158991b7 | 141 | static int template_decl_level PARAMS ((tree)); |
158991b7 | 142 | static int check_cv_quals_for_unify PARAMS ((int, tree, tree)); |
c2ea3a40 NS |
143 | static tree tsubst_template_arg_vector PARAMS ((tree, tree, tsubst_flags_t)); |
144 | static tree tsubst_template_parms PARAMS ((tree, tree, tsubst_flags_t)); | |
158991b7 KG |
145 | static void regenerate_decl_from_template PARAMS ((tree, tree)); |
146 | static tree most_specialized PARAMS ((tree, tree, tree)); | |
147 | static tree most_specialized_class PARAMS ((tree, tree)); | |
158991b7 | 148 | static int template_class_depth_real PARAMS ((tree, int)); |
c2ea3a40 NS |
149 | static tree tsubst_aggr_type PARAMS ((tree, tree, tsubst_flags_t, tree, int)); |
150 | static tree tsubst_decl PARAMS ((tree, tree, tree, tsubst_flags_t)); | |
151 | static tree tsubst_arg_types PARAMS ((tree, tree, tsubst_flags_t, tree)); | |
152 | static tree tsubst_function_type PARAMS ((tree, tree, tsubst_flags_t, tree)); | |
158991b7 KG |
153 | static void check_specialization_scope PARAMS ((void)); |
154 | static tree process_partial_specialization PARAMS ((tree)); | |
155 | static void set_current_access_from_decl PARAMS ((tree)); | |
156 | static void check_default_tmpl_args PARAMS ((tree, tree, int, int)); | |
c2ea3a40 NS |
157 | static tree tsubst_call_declarator_parms PARAMS ((tree, tree, |
158 | tsubst_flags_t, tree)); | |
158991b7 | 159 | static tree get_template_base_recursive PARAMS ((tree, tree, |
c2ea3a40 | 160 | tree, tree, tree, int)); |
158991b7 | 161 | static tree get_template_base PARAMS ((tree, tree, tree, tree)); |
74601d7c | 162 | static int verify_class_unification PARAMS ((tree, tree, tree)); |
158991b7 | 163 | static tree try_class_unification PARAMS ((tree, tree, tree, tree)); |
c2ea3a40 NS |
164 | static int coerce_template_template_parms PARAMS ((tree, tree, tsubst_flags_t, |
165 | tree, tree)); | |
158991b7 KG |
166 | static tree determine_specialization PARAMS ((tree, tree, tree *, int)); |
167 | static int template_args_equal PARAMS ((tree, tree)); | |
158991b7 KG |
168 | static void tsubst_default_arguments PARAMS ((tree)); |
169 | static tree for_each_template_parm_r PARAMS ((tree *, int *, void *)); | |
8afa707f MM |
170 | static tree copy_default_args_to_explicit_spec_1 PARAMS ((tree, tree)); |
171 | static void copy_default_args_to_explicit_spec PARAMS ((tree)); | |
c2ea3a40 | 172 | static int invalid_nontype_parm_type_p PARAMS ((tree, tsubst_flags_t)); |
a723baf1 MM |
173 | static int eq_local_specializations (const void *, const void *); |
174 | static tree template_for_substitution (tree); | |
5552b43c | 175 | static bool dependent_type_p_r (tree); |
1fb3244a | 176 | static bool dependent_template_id_p (tree, tree); |
14d22dd6 MM |
177 | static tree tsubst (tree, tree, tsubst_flags_t, tree); |
178 | static tree tsubst_expr (tree, tree, tsubst_flags_t, tree); | |
179 | static tree tsubst_copy (tree, tree, tsubst_flags_t, tree); | |
180 | static tree tsubst_copy_and_build (tree, tree, tsubst_flags_t, tree); | |
36a117a5 | 181 | |
2b59fc25 KL |
182 | /* Make the current scope suitable for access checking when we are |
183 | processing T. T can be FUNCTION_DECL for instantiated function | |
184 | template, TEMPLATE_DECL for uninstantiated one, or VAR_DECL for | |
185 | static member variable (need by instantiate_decl). ARGS is the | |
186 | template argument for TEMPLATE_DECL. If CONTEXT is not NULL_TREE, | |
187 | this is used instead of the context of T. */ | |
188 | ||
189 | void | |
190 | push_access_scope_real (t, args, context) | |
191 | tree t, args, context; | |
192 | { | |
193 | if (TREE_CODE (t) == FUNCTION_DECL || DECL_FUNCTION_TEMPLATE_P (t)) | |
194 | { | |
195 | /* When we are processing specialization `foo<Outer>' for code like | |
196 | ||
197 | template <class U> typename U::Inner foo (); | |
198 | class Outer { | |
199 | struct Inner {}; | |
200 | friend Outer::Inner foo<Outer> (); | |
201 | }; | |
202 | ||
203 | `T' is a TEMPLATE_DECL, but `Outer' is only a friend of one of | |
204 | its specialization. We can get the FUNCTION_DECL with the right | |
205 | information because this specialization has already been | |
206 | registered by the friend declaration above. */ | |
207 | ||
208 | if (DECL_FUNCTION_TEMPLATE_P (t) && args) | |
209 | { | |
210 | tree full_args = tsubst_template_arg_vector | |
211 | (DECL_TI_ARGS (DECL_TEMPLATE_RESULT (t)), args, tf_none); | |
212 | tree spec = NULL_TREE; | |
213 | if (full_args != error_mark_node) | |
214 | spec = retrieve_specialization (t, full_args); | |
215 | if (spec) | |
216 | t = spec; | |
217 | } | |
2b59fc25 KL |
218 | } |
219 | ||
220 | if (!context) | |
221 | context = DECL_CONTEXT (t); | |
222 | if (context && TYPE_P (context)) | |
14d22dd6 | 223 | push_nested_class (context); |
0f399e5f KL |
224 | else |
225 | push_to_top_level (); | |
226 | ||
227 | if (TREE_CODE (t) == FUNCTION_DECL || DECL_FUNCTION_TEMPLATE_P (t)) | |
228 | { | |
229 | saved_access_scope = tree_cons | |
230 | (NULL_TREE, current_function_decl, saved_access_scope); | |
231 | current_function_decl = t; | |
232 | } | |
2b59fc25 KL |
233 | } |
234 | ||
235 | /* Like push_access_scope_real, but always uses DECL_CONTEXT. */ | |
236 | ||
237 | void | |
238 | push_access_scope (t) | |
239 | tree t; | |
240 | { | |
241 | push_access_scope_real (t, NULL_TREE, NULL_TREE); | |
242 | } | |
243 | ||
244 | /* Restore the scope set up by push_access_scope. T is the node we | |
245 | are processing. */ | |
246 | ||
247 | void | |
248 | pop_access_scope (t) | |
249 | tree t; | |
250 | { | |
2b59fc25 KL |
251 | if (TREE_CODE (t) == FUNCTION_DECL || DECL_FUNCTION_TEMPLATE_P (t)) |
252 | { | |
253 | current_function_decl = TREE_VALUE (saved_access_scope); | |
254 | saved_access_scope = TREE_CHAIN (saved_access_scope); | |
255 | } | |
0f399e5f KL |
256 | |
257 | if (DECL_CLASS_SCOPE_P (t)) | |
258 | pop_nested_class (); | |
259 | else | |
260 | pop_from_top_level (); | |
2b59fc25 KL |
261 | } |
262 | ||
a723baf1 MM |
263 | /* Do any processing required when DECL (a member template |
264 | declaration) is finished. Returns the TEMPLATE_DECL corresponding | |
265 | to DECL, unless it is a specialization, in which case the DECL | |
266 | itself is returned. */ | |
e1467ff2 MM |
267 | |
268 | tree | |
61a127b3 | 269 | finish_member_template_decl (decl) |
e1467ff2 MM |
270 | tree decl; |
271 | { | |
a723baf1 MM |
272 | if (decl == error_mark_node) |
273 | return error_mark_node; | |
274 | ||
275 | my_friendly_assert (DECL_P (decl), 20020812); | |
276 | ||
277 | if (TREE_CODE (decl) == TYPE_DECL) | |
93cdc044 | 278 | { |
a723baf1 MM |
279 | tree type; |
280 | ||
281 | type = TREE_TYPE (decl); | |
282 | if (IS_AGGR_TYPE (type) | |
283 | && CLASSTYPE_TEMPLATE_INFO (type) | |
284 | && !CLASSTYPE_TEMPLATE_SPECIALIZATION (type)) | |
93cdc044 | 285 | { |
a723baf1 | 286 | tree tmpl = CLASSTYPE_TI_TEMPLATE (type); |
93cdc044 JM |
287 | check_member_template (tmpl); |
288 | return tmpl; | |
289 | } | |
8d019cef | 290 | return NULL_TREE; |
93cdc044 | 291 | } |
07c88314 | 292 | else if (TREE_CODE (decl) == FIELD_DECL) |
33bd39a2 | 293 | error ("data member `%D' cannot be a member template", decl); |
a1da6cba | 294 | else if (DECL_TEMPLATE_INFO (decl)) |
e1467ff2 | 295 | { |
a1da6cba MM |
296 | if (!DECL_TEMPLATE_SPECIALIZATION (decl)) |
297 | { | |
298 | check_member_template (DECL_TI_TEMPLATE (decl)); | |
299 | return DECL_TI_TEMPLATE (decl); | |
300 | } | |
301 | else | |
302 | return decl; | |
303 | } | |
304 | else | |
33bd39a2 | 305 | error ("invalid member template declaration `%D'", decl); |
e1467ff2 | 306 | |
a1da6cba | 307 | return error_mark_node; |
f84b4be9 | 308 | } |
e1467ff2 | 309 | |
f84b4be9 JM |
310 | /* Returns the template nesting level of the indicated class TYPE. |
311 | ||
312 | For example, in: | |
313 | template <class T> | |
314 | struct A | |
315 | { | |
316 | template <class U> | |
317 | struct B {}; | |
318 | }; | |
319 | ||
39c01e4c MM |
320 | A<T>::B<U> has depth two, while A<T> has depth one. |
321 | Both A<T>::B<int> and A<int>::B<U> have depth one, if | |
322 | COUNT_SPECIALIZATIONS is 0 or if they are instantiations, not | |
323 | specializations. | |
324 | ||
325 | This function is guaranteed to return 0 if passed NULL_TREE so | |
326 | that, for example, `template_class_depth (current_class_type)' is | |
327 | always safe. */ | |
f84b4be9 | 328 | |
e9659ab0 | 329 | static int |
39c01e4c | 330 | template_class_depth_real (type, count_specializations) |
f84b4be9 | 331 | tree type; |
39c01e4c | 332 | int count_specializations; |
f84b4be9 | 333 | { |
93cdc044 | 334 | int depth; |
f84b4be9 | 335 | |
2c73f9f5 | 336 | for (depth = 0; |
ed44da02 MM |
337 | type && TREE_CODE (type) != NAMESPACE_DECL; |
338 | type = (TREE_CODE (type) == FUNCTION_DECL) | |
4f1c5b7d | 339 | ? CP_DECL_CONTEXT (type) : TYPE_CONTEXT (type)) |
ed44da02 MM |
340 | { |
341 | if (TREE_CODE (type) != FUNCTION_DECL) | |
342 | { | |
343 | if (CLASSTYPE_TEMPLATE_INFO (type) | |
344 | && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (type)) | |
345 | && ((count_specializations | |
370af2d5 | 346 | && CLASSTYPE_TEMPLATE_SPECIALIZATION (type)) |
ed44da02 MM |
347 | || uses_template_parms (CLASSTYPE_TI_ARGS (type)))) |
348 | ++depth; | |
349 | } | |
350 | else | |
351 | { | |
352 | if (DECL_TEMPLATE_INFO (type) | |
353 | && PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (type)) | |
354 | && ((count_specializations | |
355 | && DECL_TEMPLATE_SPECIALIZATION (type)) | |
356 | || uses_template_parms (DECL_TI_ARGS (type)))) | |
357 | ++depth; | |
358 | } | |
359 | } | |
f84b4be9 JM |
360 | |
361 | return depth; | |
e1467ff2 | 362 | } |
98c1c668 | 363 | |
39c01e4c MM |
364 | /* Returns the template nesting level of the indicated class TYPE. |
365 | Like template_class_depth_real, but instantiations do not count in | |
366 | the depth. */ | |
367 | ||
368 | int | |
369 | template_class_depth (type) | |
370 | tree type; | |
371 | { | |
372 | return template_class_depth_real (type, /*count_specializations=*/0); | |
373 | } | |
374 | ||
cae40af6 JM |
375 | /* Returns 1 if processing DECL as part of do_pending_inlines |
376 | needs us to push template parms. */ | |
377 | ||
378 | static int | |
379 | inline_needs_template_parms (decl) | |
380 | tree decl; | |
381 | { | |
382 | if (! DECL_TEMPLATE_INFO (decl)) | |
383 | return 0; | |
f84b4be9 | 384 | |
36a117a5 | 385 | return (TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (most_general_template (decl))) |
cae40af6 JM |
386 | > (processing_template_decl + DECL_TEMPLATE_SPECIALIZATION (decl))); |
387 | } | |
388 | ||
389 | /* Subroutine of maybe_begin_member_template_processing. | |
390 | Push the template parms in PARMS, starting from LEVELS steps into the | |
391 | chain, and ending at the beginning, since template parms are listed | |
392 | innermost first. */ | |
393 | ||
394 | static void | |
395 | push_inline_template_parms_recursive (parmlist, levels) | |
396 | tree parmlist; | |
397 | int levels; | |
398 | { | |
399 | tree parms = TREE_VALUE (parmlist); | |
400 | int i; | |
401 | ||
402 | if (levels > 1) | |
403 | push_inline_template_parms_recursive (TREE_CHAIN (parmlist), levels - 1); | |
786b5245 | 404 | |
98c1c668 | 405 | ++processing_template_decl; |
cae40af6 | 406 | current_template_parms |
4890c2f4 | 407 | = tree_cons (size_int (processing_template_decl), |
98c1c668 | 408 | parms, current_template_parms); |
cae40af6 JM |
409 | TEMPLATE_PARMS_FOR_INLINE (current_template_parms) = 1; |
410 | ||
786b5245 | 411 | pushlevel (0); |
98c1c668 JM |
412 | for (i = 0; i < TREE_VEC_LENGTH (parms); ++i) |
413 | { | |
786b5245 | 414 | tree parm = TREE_VALUE (TREE_VEC_ELT (parms, i)); |
2f939d94 | 415 | my_friendly_assert (DECL_P (parm), 0); |
cae40af6 | 416 | |
98c1c668 JM |
417 | switch (TREE_CODE (parm)) |
418 | { | |
786b5245 | 419 | case TYPE_DECL: |
73b0fce8 | 420 | case TEMPLATE_DECL: |
98c1c668 JM |
421 | pushdecl (parm); |
422 | break; | |
786b5245 MM |
423 | |
424 | case PARM_DECL: | |
425 | { | |
fc03edb3 MM |
426 | /* Make a CONST_DECL as is done in process_template_parm. |
427 | It is ugly that we recreate this here; the original | |
428 | version built in process_template_parm is no longer | |
429 | available. */ | |
786b5245 MM |
430 | tree decl = build_decl (CONST_DECL, DECL_NAME (parm), |
431 | TREE_TYPE (parm)); | |
c727aa5e | 432 | DECL_ARTIFICIAL (decl) = 1; |
3e4a3562 | 433 | TREE_CONSTANT (decl) = TREE_READONLY (decl) = 1; |
786b5245 | 434 | DECL_INITIAL (decl) = DECL_INITIAL (parm); |
cd9f6678 | 435 | SET_DECL_TEMPLATE_PARM_P (decl); |
786b5245 MM |
436 | pushdecl (decl); |
437 | } | |
cae40af6 | 438 | break; |
786b5245 | 439 | |
98c1c668 | 440 | default: |
a98facb0 | 441 | abort (); |
98c1c668 JM |
442 | } |
443 | } | |
444 | } | |
445 | ||
cae40af6 JM |
446 | /* Restore the template parameter context for a member template or |
447 | a friend template defined in a class definition. */ | |
448 | ||
449 | void | |
450 | maybe_begin_member_template_processing (decl) | |
451 | tree decl; | |
452 | { | |
453 | tree parms; | |
3dcaad8b | 454 | int levels = 0; |
cae40af6 | 455 | |
3dcaad8b MM |
456 | if (inline_needs_template_parms (decl)) |
457 | { | |
458 | parms = DECL_TEMPLATE_PARMS (most_general_template (decl)); | |
459 | levels = TMPL_PARMS_DEPTH (parms) - processing_template_decl; | |
cae40af6 | 460 | |
3dcaad8b MM |
461 | if (DECL_TEMPLATE_SPECIALIZATION (decl)) |
462 | { | |
463 | --levels; | |
464 | parms = TREE_CHAIN (parms); | |
465 | } | |
cae40af6 | 466 | |
3dcaad8b | 467 | push_inline_template_parms_recursive (parms, levels); |
cae40af6 JM |
468 | } |
469 | ||
3dcaad8b MM |
470 | /* Remember how many levels of template parameters we pushed so that |
471 | we can pop them later. */ | |
472 | if (!inline_parm_levels) | |
473 | VARRAY_INT_INIT (inline_parm_levels, 4, "inline_parm_levels"); | |
474 | if (inline_parm_levels_used == inline_parm_levels->num_elements) | |
475 | VARRAY_GROW (inline_parm_levels, 2 * inline_parm_levels_used); | |
476 | VARRAY_INT (inline_parm_levels, inline_parm_levels_used) = levels; | |
477 | ++inline_parm_levels_used; | |
cae40af6 JM |
478 | } |
479 | ||
c6002625 | 480 | /* Undo the effects of begin_member_template_processing. */ |
98c1c668 JM |
481 | |
482 | void | |
b370501f | 483 | maybe_end_member_template_processing () |
98c1c668 | 484 | { |
3dcaad8b MM |
485 | int i; |
486 | ||
487 | if (!inline_parm_levels_used) | |
98c1c668 JM |
488 | return; |
489 | ||
3dcaad8b MM |
490 | --inline_parm_levels_used; |
491 | for (i = 0; | |
492 | i < VARRAY_INT (inline_parm_levels, inline_parm_levels_used); | |
493 | ++i) | |
cae40af6 JM |
494 | { |
495 | --processing_template_decl; | |
496 | current_template_parms = TREE_CHAIN (current_template_parms); | |
497 | poplevel (0, 0, 0); | |
498 | } | |
98c1c668 JM |
499 | } |
500 | ||
838dfd8a | 501 | /* Returns nonzero iff T is a member template function. We must be |
f84b4be9 | 502 | careful as in |
75650646 MM |
503 | |
504 | template <class T> class C { void f(); } | |
505 | ||
506 | Here, f is a template function, and a member, but not a member | |
507 | template. This function does not concern itself with the origin of | |
508 | T, only its present state. So if we have | |
509 | ||
510 | template <class T> class C { template <class U> void f(U); } | |
511 | ||
512 | then neither C<int>::f<char> nor C<T>::f<double> is considered | |
f181d4ae MM |
513 | to be a member template. But, `template <class U> void |
514 | C<int>::f(U)' is considered a member template. */ | |
98c1c668 | 515 | |
cae40af6 JM |
516 | int |
517 | is_member_template (t) | |
98c1c668 JM |
518 | tree t; |
519 | { | |
f181d4ae | 520 | if (!DECL_FUNCTION_TEMPLATE_P (t)) |
75650646 | 521 | /* Anything that isn't a function or a template function is |
aa5f3bad MM |
522 | certainly not a member template. */ |
523 | return 0; | |
524 | ||
cae40af6 | 525 | /* A local class can't have member templates. */ |
4f1c5b7d | 526 | if (decl_function_context (t)) |
cae40af6 JM |
527 | return 0; |
528 | ||
f181d4ae | 529 | return (DECL_FUNCTION_MEMBER_P (DECL_TEMPLATE_RESULT (t)) |
f84b4be9 JM |
530 | /* If there are more levels of template parameters than |
531 | there are template classes surrounding the declaration, | |
532 | then we have a member template. */ | |
f181d4ae | 533 | && (TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (t)) > |
4f1c5b7d | 534 | template_class_depth (DECL_CONTEXT (t)))); |
f84b4be9 | 535 | } |
98c1c668 | 536 | |
ba4f4e5d | 537 | #if 0 /* UNUSED */ |
838dfd8a | 538 | /* Returns nonzero iff T is a member template class. See |
2ee4e084 MM |
539 | is_member_template for a description of what precisely constitutes |
540 | a member template. */ | |
541 | ||
542 | int | |
543 | is_member_template_class (t) | |
544 | tree t; | |
545 | { | |
546 | if (!DECL_CLASS_TEMPLATE_P (t)) | |
547 | /* Anything that isn't a class template, is certainly not a member | |
548 | template. */ | |
549 | return 0; | |
550 | ||
551 | if (!DECL_CLASS_SCOPE_P (t)) | |
552 | /* Anything whose context isn't a class type is surely not a | |
553 | member template. */ | |
554 | return 0; | |
555 | ||
556 | /* If there are more levels of template parameters than there are | |
557 | template classes surrounding the declaration, then we have a | |
558 | member template. */ | |
36a117a5 | 559 | return (TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (t)) > |
2ee4e084 MM |
560 | template_class_depth (DECL_CONTEXT (t))); |
561 | } | |
ba4f4e5d | 562 | #endif |
2ee4e084 | 563 | |
36a117a5 | 564 | /* Return a new template argument vector which contains all of ARGS, |
f9a7ae04 | 565 | but has as its innermost set of arguments the EXTRA_ARGS. */ |
e6f1275f JM |
566 | |
567 | static tree | |
36a117a5 MM |
568 | add_to_template_args (args, extra_args) |
569 | tree args; | |
570 | tree extra_args; | |
e6f1275f | 571 | { |
36a117a5 MM |
572 | tree new_args; |
573 | int extra_depth; | |
574 | int i; | |
575 | int j; | |
e6f1275f | 576 | |
36a117a5 | 577 | extra_depth = TMPL_ARGS_DEPTH (extra_args); |
f31c0a32 | 578 | new_args = make_tree_vec (TMPL_ARGS_DEPTH (args) + extra_depth); |
e6f1275f | 579 | |
36a117a5 MM |
580 | for (i = 1; i <= TMPL_ARGS_DEPTH (args); ++i) |
581 | SET_TMPL_ARGS_LEVEL (new_args, i, TMPL_ARGS_LEVEL (args, i)); | |
e6f1275f | 582 | |
36a117a5 MM |
583 | for (j = 1; j <= extra_depth; ++j, ++i) |
584 | SET_TMPL_ARGS_LEVEL (new_args, i, TMPL_ARGS_LEVEL (extra_args, j)); | |
585 | ||
e6f1275f JM |
586 | return new_args; |
587 | } | |
588 | ||
36a117a5 MM |
589 | /* Like add_to_template_args, but only the outermost ARGS are added to |
590 | the EXTRA_ARGS. In particular, all but TMPL_ARGS_DEPTH | |
591 | (EXTRA_ARGS) levels are added. This function is used to combine | |
592 | the template arguments from a partial instantiation with the | |
593 | template arguments used to attain the full instantiation from the | |
594 | partial instantiation. */ | |
98c1c668 | 595 | |
4966381a | 596 | static tree |
36a117a5 | 597 | add_outermost_template_args (args, extra_args) |
98c1c668 JM |
598 | tree args; |
599 | tree extra_args; | |
600 | { | |
601 | tree new_args; | |
602 | ||
e4a84209 MM |
603 | /* If there are more levels of EXTRA_ARGS than there are ARGS, |
604 | something very fishy is going on. */ | |
605 | my_friendly_assert (TMPL_ARGS_DEPTH (args) >= TMPL_ARGS_DEPTH (extra_args), | |
606 | 0); | |
607 | ||
608 | /* If *all* the new arguments will be the EXTRA_ARGS, just return | |
609 | them. */ | |
610 | if (TMPL_ARGS_DEPTH (args) == TMPL_ARGS_DEPTH (extra_args)) | |
611 | return extra_args; | |
612 | ||
36a117a5 MM |
613 | /* For the moment, we make ARGS look like it contains fewer levels. */ |
614 | TREE_VEC_LENGTH (args) -= TMPL_ARGS_DEPTH (extra_args); | |
615 | ||
616 | new_args = add_to_template_args (args, extra_args); | |
98c1c668 | 617 | |
36a117a5 MM |
618 | /* Now, we restore ARGS to its full dimensions. */ |
619 | TREE_VEC_LENGTH (args) += TMPL_ARGS_DEPTH (extra_args); | |
98c1c668 JM |
620 | |
621 | return new_args; | |
622 | } | |
5566b478 | 623 | |
f9a7ae04 MM |
624 | /* Return the N levels of innermost template arguments from the ARGS. */ |
625 | ||
626 | tree | |
627 | get_innermost_template_args (args, n) | |
628 | tree args; | |
629 | int n; | |
630 | { | |
631 | tree new_args; | |
632 | int extra_levels; | |
633 | int i; | |
634 | ||
635 | my_friendly_assert (n >= 0, 20000603); | |
636 | ||
637 | /* If N is 1, just return the innermost set of template arguments. */ | |
638 | if (n == 1) | |
639 | return TMPL_ARGS_LEVEL (args, TMPL_ARGS_DEPTH (args)); | |
640 | ||
641 | /* If we're not removing anything, just return the arguments we were | |
642 | given. */ | |
643 | extra_levels = TMPL_ARGS_DEPTH (args) - n; | |
644 | my_friendly_assert (extra_levels >= 0, 20000603); | |
645 | if (extra_levels == 0) | |
646 | return args; | |
647 | ||
648 | /* Make a new set of arguments, not containing the outer arguments. */ | |
649 | new_args = make_tree_vec (n); | |
650 | for (i = 1; i <= n; ++i) | |
651 | SET_TMPL_ARGS_LEVEL (new_args, i, | |
652 | TMPL_ARGS_LEVEL (args, i + extra_levels)); | |
653 | ||
654 | return new_args; | |
655 | } | |
656 | ||
5566b478 MS |
657 | /* We've got a template header coming up; push to a new level for storing |
658 | the parms. */ | |
8d08fdba | 659 | |
8d08fdba MS |
660 | void |
661 | begin_template_parm_list () | |
662 | { | |
6757edfe MM |
663 | /* We use a non-tag-transparent scope here, which causes pushtag to |
664 | put tags in this scope, rather than in the enclosing class or | |
665 | namespace scope. This is the right thing, since we want | |
666 | TEMPLATE_DECLS, and not TYPE_DECLS for template classes. For a | |
667 | global template class, push_template_decl handles putting the | |
668 | TEMPLATE_DECL into top-level scope. For a nested template class, | |
669 | e.g.: | |
670 | ||
671 | template <class T> struct S1 { | |
672 | template <class T> struct S2 {}; | |
673 | }; | |
674 | ||
675 | pushtag contains special code to call pushdecl_with_scope on the | |
676 | TEMPLATE_DECL for S2. */ | |
74b846e0 | 677 | begin_scope (sk_template_parms); |
5156628f | 678 | ++processing_template_decl; |
67ffc812 | 679 | ++processing_template_parmlist; |
386b8a85 JM |
680 | note_template_header (0); |
681 | } | |
682 | ||
6c30752f | 683 | /* This routine is called when a specialization is declared. If it is |
0e339752 | 684 | invalid to declare a specialization here, an error is reported. */ |
6c30752f | 685 | |
e9659ab0 | 686 | static void |
6c30752f MM |
687 | check_specialization_scope () |
688 | { | |
689 | tree scope = current_scope (); | |
3ddfb0e6 | 690 | |
6c30752f MM |
691 | /* [temp.expl.spec] |
692 | ||
693 | An explicit specialization shall be declared in the namespace of | |
694 | which the template is a member, or, for member templates, in the | |
695 | namespace of which the enclosing class or enclosing class | |
696 | template is a member. An explicit specialization of a member | |
697 | function, member class or static data member of a class template | |
698 | shall be declared in the namespace of which the class template | |
699 | is a member. */ | |
700 | if (scope && TREE_CODE (scope) != NAMESPACE_DECL) | |
33bd39a2 | 701 | error ("explicit specialization in non-namespace scope `%D'", |
6c30752f | 702 | scope); |
3ddfb0e6 | 703 | |
6c30752f MM |
704 | /* [temp.expl.spec] |
705 | ||
706 | In an explicit specialization declaration for a member of a class | |
707 | template or a member template that appears in namespace scope, | |
708 | the member template and some of its enclosing class templates may | |
709 | remain unspecialized, except that the declaration shall not | |
710 | explicitly specialize a class member template if its enclosing | |
711 | class templates are not explicitly specialized as well. */ | |
712 | if (current_template_parms) | |
33bd39a2 | 713 | error ("enclosing class templates are not explicitly specialized"); |
6c30752f MM |
714 | } |
715 | ||
c6002625 | 716 | /* We've just seen template <>. */ |
386b8a85 JM |
717 | |
718 | void | |
719 | begin_specialization () | |
720 | { | |
74b846e0 | 721 | begin_scope (sk_template_spec); |
386b8a85 | 722 | note_template_header (1); |
6c30752f | 723 | check_specialization_scope (); |
386b8a85 JM |
724 | } |
725 | ||
dc957d14 | 726 | /* Called at then end of processing a declaration preceded by |
386b8a85 JM |
727 | template<>. */ |
728 | ||
729 | void | |
730 | end_specialization () | |
731 | { | |
74b846e0 | 732 | finish_scope (); |
386b8a85 JM |
733 | reset_specialization (); |
734 | } | |
735 | ||
386b8a85 | 736 | /* Any template <>'s that we have seen thus far are not referring to a |
c6002625 | 737 | function specialization. */ |
386b8a85 JM |
738 | |
739 | void | |
740 | reset_specialization () | |
741 | { | |
742 | processing_specialization = 0; | |
743 | template_header_count = 0; | |
744 | } | |
745 | ||
838dfd8a | 746 | /* We've just seen a template header. If SPECIALIZATION is nonzero, |
386b8a85 JM |
747 | it was of the form template <>. */ |
748 | ||
4966381a | 749 | static void |
386b8a85 JM |
750 | note_template_header (specialization) |
751 | int specialization; | |
752 | { | |
753 | processing_specialization = specialization; | |
754 | template_header_count++; | |
755 | } | |
756 | ||
75650646 | 757 | /* We're beginning an explicit instantiation. */ |
386b8a85 | 758 | |
75650646 MM |
759 | void |
760 | begin_explicit_instantiation () | |
386b8a85 | 761 | { |
a723baf1 MM |
762 | my_friendly_assert (!processing_explicit_instantiation, 20020913); |
763 | processing_explicit_instantiation = true; | |
75650646 | 764 | } |
386b8a85 | 765 | |
386b8a85 | 766 | |
75650646 MM |
767 | void |
768 | end_explicit_instantiation () | |
769 | { | |
a723baf1 MM |
770 | my_friendly_assert(processing_explicit_instantiation, 20020913); |
771 | processing_explicit_instantiation = false; | |
75650646 | 772 | } |
386b8a85 | 773 | |
36a117a5 MM |
774 | /* The TYPE is being declared. If it is a template type, that means it |
775 | is a partial specialization. Do appropriate error-checking. */ | |
776 | ||
777 | void | |
778 | maybe_process_partial_specialization (type) | |
779 | tree type; | |
780 | { | |
6e049fcd KL |
781 | /* TYPE maybe an ERROR_MARK_NODE. */ |
782 | tree context = TYPE_P (type) ? TYPE_CONTEXT (type) : NULL_TREE; | |
783 | ||
a723baf1 | 784 | if (CLASS_TYPE_P (type) && CLASSTYPE_USE_TEMPLATE (type)) |
36a117a5 | 785 | { |
6e049fcd KL |
786 | /* This is for ordinary explicit specialization and partial |
787 | specialization of a template class such as: | |
788 | ||
789 | template <> class C<int>; | |
790 | ||
791 | or: | |
792 | ||
793 | template <class T> class C<T*>; | |
794 | ||
795 | Make sure that `C<int>' and `C<T*>' are implicit instantiations. */ | |
796 | ||
36a117a5 | 797 | if (CLASSTYPE_IMPLICIT_INSTANTIATION (type) |
d0f062fb | 798 | && !COMPLETE_TYPE_P (type)) |
36a117a5 | 799 | { |
700466c2 JM |
800 | if (current_namespace |
801 | != decl_namespace_context (CLASSTYPE_TI_TEMPLATE (type))) | |
802 | { | |
33bd39a2 | 803 | pedwarn ("specializing `%#T' in different namespace", type); |
700466c2 JM |
804 | cp_pedwarn_at (" from definition of `%#D'", |
805 | CLASSTYPE_TI_TEMPLATE (type)); | |
806 | } | |
370af2d5 | 807 | SET_CLASSTYPE_TEMPLATE_SPECIALIZATION (type); |
36a117a5 MM |
808 | if (processing_template_decl) |
809 | push_template_decl (TYPE_MAIN_DECL (type)); | |
810 | } | |
811 | else if (CLASSTYPE_TEMPLATE_INSTANTIATION (type)) | |
33bd39a2 | 812 | error ("specialization of `%T' after instantiation", type); |
36a117a5 | 813 | } |
6e049fcd KL |
814 | else if (CLASS_TYPE_P (type) |
815 | && !CLASSTYPE_USE_TEMPLATE (type) | |
816 | && CLASSTYPE_TEMPLATE_INFO (type) | |
817 | && context && CLASS_TYPE_P (context) | |
818 | && CLASSTYPE_TEMPLATE_INFO (context)) | |
819 | { | |
820 | /* This is for an explicit specialization of member class | |
821 | template according to [temp.expl.spec/18]: | |
822 | ||
823 | template <> template <class U> class C<int>::D; | |
824 | ||
825 | The context `C<int>' must be an implicit instantiation. | |
826 | Otherwise this is just a member class template declared | |
827 | earlier like: | |
828 | ||
829 | template <> class C<int> { template <class U> class D; }; | |
830 | template <> template <class U> class C<int>::D; | |
831 | ||
832 | In the first case, `C<int>::D' is a specialization of `C<T>::D' | |
833 | while in the second case, `C<int>::D' is a primary template | |
834 | and `C<T>::D' may not exist. */ | |
835 | ||
836 | if (CLASSTYPE_IMPLICIT_INSTANTIATION (context) | |
837 | && !COMPLETE_TYPE_P (type)) | |
838 | { | |
839 | tree t; | |
840 | ||
841 | if (current_namespace | |
842 | != decl_namespace_context (CLASSTYPE_TI_TEMPLATE (type))) | |
843 | { | |
844 | pedwarn ("specializing `%#T' in different namespace", type); | |
845 | cp_pedwarn_at (" from definition of `%#D'", | |
846 | CLASSTYPE_TI_TEMPLATE (type)); | |
847 | } | |
848 | ||
849 | /* Check for invalid specialization after instantiation: | |
850 | ||
851 | template <> template <> class C<int>::D<int>; | |
852 | template <> template <class U> class C<int>::D; */ | |
853 | ||
854 | for (t = DECL_TEMPLATE_INSTANTIATIONS | |
855 | (most_general_template (CLASSTYPE_TI_TEMPLATE (type))); | |
856 | t; t = TREE_CHAIN (t)) | |
857 | if (TREE_VALUE (t) != type | |
858 | && TYPE_CONTEXT (TREE_VALUE (t)) == context) | |
859 | error ("specialization `%T' after instantiation `%T'", | |
860 | type, TREE_VALUE (t)); | |
861 | ||
862 | /* Mark TYPE as a specialization. And as a result, we only | |
863 | have one level of template argument for the innermost | |
864 | class template. */ | |
865 | SET_CLASSTYPE_TEMPLATE_SPECIALIZATION (type); | |
866 | CLASSTYPE_TI_ARGS (type) | |
867 | = INNERMOST_TEMPLATE_ARGS (CLASSTYPE_TI_ARGS (type)); | |
868 | } | |
869 | } | |
20496fa2 | 870 | else if (processing_specialization) |
33bd39a2 | 871 | error ("explicit specialization of non-template `%T'", type); |
36a117a5 MM |
872 | } |
873 | ||
75650646 MM |
874 | /* Retrieve the specialization (in the sense of [temp.spec] - a |
875 | specialization is either an instantiation or an explicit | |
876 | specialization) of TMPL for the given template ARGS. If there is | |
877 | no such specialization, return NULL_TREE. The ARGS are a vector of | |
878 | arguments, or a vector of vectors of arguments, in the case of | |
879 | templates with more than one level of parameters. */ | |
880 | ||
881 | static tree | |
882 | retrieve_specialization (tmpl, args) | |
883 | tree tmpl; | |
884 | tree args; | |
885 | { | |
886 | tree s; | |
887 | ||
888 | my_friendly_assert (TREE_CODE (tmpl) == TEMPLATE_DECL, 0); | |
889 | ||
36a117a5 MM |
890 | /* There should be as many levels of arguments as there are |
891 | levels of parameters. */ | |
892 | my_friendly_assert (TMPL_ARGS_DEPTH (args) | |
893 | == TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (tmpl)), | |
894 | 0); | |
895 | ||
75650646 MM |
896 | for (s = DECL_TEMPLATE_SPECIALIZATIONS (tmpl); |
897 | s != NULL_TREE; | |
898 | s = TREE_CHAIN (s)) | |
899 | if (comp_template_args (TREE_PURPOSE (s), args)) | |
900 | return TREE_VALUE (s); | |
901 | ||
902 | return NULL_TREE; | |
386b8a85 JM |
903 | } |
904 | ||
dc957d14 | 905 | /* Like retrieve_specialization, but for local declarations. */ |
9188c363 MM |
906 | |
907 | static tree | |
6dfbb909 | 908 | retrieve_local_specialization (tmpl) |
9188c363 | 909 | tree tmpl; |
9188c363 | 910 | { |
69f794a7 MM |
911 | tree spec = |
912 | (tree) htab_find_with_hash (local_specializations, tmpl, | |
913 | htab_hash_pointer (tmpl)); | |
a723baf1 | 914 | return spec ? TREE_PURPOSE (spec) : NULL_TREE; |
9188c363 MM |
915 | } |
916 | ||
838dfd8a | 917 | /* Returns nonzero iff DECL is a specialization of TMPL. */ |
6757edfe MM |
918 | |
919 | int | |
920 | is_specialization_of (decl, tmpl) | |
921 | tree decl; | |
922 | tree tmpl; | |
923 | { | |
924 | tree t; | |
925 | ||
926 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
927 | { | |
928 | for (t = decl; | |
929 | t != NULL_TREE; | |
930 | t = DECL_TEMPLATE_INFO (t) ? DECL_TI_TEMPLATE (t) : NULL_TREE) | |
931 | if (t == tmpl) | |
932 | return 1; | |
933 | } | |
934 | else | |
935 | { | |
936 | my_friendly_assert (TREE_CODE (decl) == TYPE_DECL, 0); | |
937 | ||
938 | for (t = TREE_TYPE (decl); | |
939 | t != NULL_TREE; | |
940 | t = CLASSTYPE_USE_TEMPLATE (t) | |
941 | ? TREE_TYPE (CLASSTYPE_TI_TEMPLATE (t)) : NULL_TREE) | |
9edc3913 | 942 | if (same_type_ignoring_top_level_qualifiers_p (t, TREE_TYPE (tmpl))) |
6757edfe MM |
943 | return 1; |
944 | } | |
386b8a85 | 945 | |
6757edfe MM |
946 | return 0; |
947 | } | |
75650646 MM |
948 | |
949 | /* Register the specialization SPEC as a specialization of TMPL with | |
36a117a5 MM |
950 | the indicated ARGS. Returns SPEC, or an equivalent prior |
951 | declaration, if available. */ | |
75650646 | 952 | |
36a117a5 | 953 | static tree |
75650646 MM |
954 | register_specialization (spec, tmpl, args) |
955 | tree spec; | |
956 | tree tmpl; | |
957 | tree args; | |
958 | { | |
959 | tree s; | |
960 | ||
961 | my_friendly_assert (TREE_CODE (tmpl) == TEMPLATE_DECL, 0); | |
962 | ||
36a117a5 MM |
963 | if (TREE_CODE (spec) == FUNCTION_DECL |
964 | && uses_template_parms (DECL_TI_ARGS (spec))) | |
965 | /* This is the FUNCTION_DECL for a partial instantiation. Don't | |
966 | register it; we want the corresponding TEMPLATE_DECL instead. | |
967 | We use `uses_template_parms (DECL_TI_ARGS (spec))' rather than | |
968 | the more obvious `uses_template_parms (spec)' to avoid problems | |
969 | with default function arguments. In particular, given | |
970 | something like this: | |
971 | ||
972 | template <class T> void f(T t1, T t = T()) | |
973 | ||
974 | the default argument expression is not substituted for in an | |
975 | instantiation unless and until it is actually needed. */ | |
976 | return spec; | |
75650646 | 977 | |
36a117a5 MM |
978 | /* There should be as many levels of arguments as there are |
979 | levels of parameters. */ | |
980 | my_friendly_assert (TMPL_ARGS_DEPTH (args) | |
981 | == TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (tmpl)), | |
982 | 0); | |
983 | ||
75650646 MM |
984 | for (s = DECL_TEMPLATE_SPECIALIZATIONS (tmpl); |
985 | s != NULL_TREE; | |
986 | s = TREE_CHAIN (s)) | |
22e9174f MM |
987 | { |
988 | tree fn = TREE_VALUE (s); | |
989 | ||
990 | /* We can sometimes try to re-register a specialization that we've | |
991 | already got. In particular, regenerate_decl_from_template | |
992 | calls duplicate_decls which will update the specialization | |
993 | list. But, we'll still get called again here anyhow. It's | |
994 | more convenient to simply allow this than to try to prevent it. */ | |
995 | if (fn == spec) | |
996 | return spec; | |
997 | else if (comp_template_args (TREE_PURPOSE (s), args)) | |
998 | { | |
999 | if (DECL_TEMPLATE_SPECIALIZATION (spec)) | |
1000 | { | |
1001 | if (DECL_TEMPLATE_INSTANTIATION (fn)) | |
1002 | { | |
1003 | if (TREE_USED (fn) | |
1004 | || DECL_EXPLICIT_INSTANTIATION (fn)) | |
1005 | { | |
33bd39a2 | 1006 | error ("specialization of %D after instantiation", |
22e9174f MM |
1007 | fn); |
1008 | return spec; | |
1009 | } | |
1010 | else | |
1011 | { | |
1012 | /* This situation should occur only if the first | |
1013 | specialization is an implicit instantiation, | |
1014 | the second is an explicit specialization, and | |
1015 | the implicit instantiation has not yet been | |
1016 | used. That situation can occur if we have | |
1017 | implicitly instantiated a member function and | |
1018 | then specialized it later. | |
1019 | ||
1020 | We can also wind up here if a friend | |
1021 | declaration that looked like an instantiation | |
1022 | turns out to be a specialization: | |
1023 | ||
1024 | template <class T> void foo(T); | |
1025 | class S { friend void foo<>(int) }; | |
1026 | template <> void foo(int); | |
1027 | ||
1028 | We transform the existing DECL in place so that | |
1029 | any pointers to it become pointers to the | |
1030 | updated declaration. | |
1031 | ||
1032 | If there was a definition for the template, but | |
1033 | not for the specialization, we want this to | |
1034 | look as if there is no definition, and vice | |
1035 | versa. */ | |
1036 | DECL_INITIAL (fn) = NULL_TREE; | |
1037 | duplicate_decls (spec, fn); | |
1038 | ||
1039 | return fn; | |
1040 | } | |
1041 | } | |
1042 | else if (DECL_TEMPLATE_SPECIALIZATION (fn)) | |
1043 | { | |
1044 | duplicate_decls (spec, fn); | |
1045 | return fn; | |
1046 | } | |
1047 | } | |
1048 | } | |
75650646 MM |
1049 | } |
1050 | ||
1051 | DECL_TEMPLATE_SPECIALIZATIONS (tmpl) | |
e1b3e07d | 1052 | = tree_cons (args, spec, DECL_TEMPLATE_SPECIALIZATIONS (tmpl)); |
36a117a5 MM |
1053 | |
1054 | return spec; | |
1055 | } | |
1056 | ||
1057 | /* Unregister the specialization SPEC as a specialization of TMPL. | |
1058 | Returns nonzero if the SPEC was listed as a specialization of | |
1059 | TMPL. */ | |
1060 | ||
1061 | static int | |
1062 | unregister_specialization (spec, tmpl) | |
1063 | tree spec; | |
1064 | tree tmpl; | |
1065 | { | |
1066 | tree* s; | |
1067 | ||
1068 | for (s = &DECL_TEMPLATE_SPECIALIZATIONS (tmpl); | |
1069 | *s != NULL_TREE; | |
1070 | s = &TREE_CHAIN (*s)) | |
1071 | if (TREE_VALUE (*s) == spec) | |
1072 | { | |
1073 | *s = TREE_CHAIN (*s); | |
1074 | return 1; | |
1075 | } | |
1076 | ||
1077 | return 0; | |
75650646 MM |
1078 | } |
1079 | ||
a723baf1 MM |
1080 | /* Compare an entry in the local specializations hash table P1 (which |
1081 | is really a pointer to a TREE_LIST) with P2 (which is really a | |
1082 | DECL). */ | |
1083 | ||
1084 | static int | |
1085 | eq_local_specializations (const void *p1, const void *p2) | |
1086 | { | |
1087 | return TREE_VALUE ((tree) p1) == (tree) p2; | |
1088 | } | |
1089 | ||
69f794a7 MM |
1090 | /* Hash P1, an entry in the local specializations table. */ |
1091 | ||
1092 | static hashval_t | |
1093 | hash_local_specialization (const void* p1) | |
1094 | { | |
1095 | return htab_hash_pointer (TREE_VALUE ((tree) p1)); | |
1096 | } | |
1097 | ||
6dfbb909 MM |
1098 | /* Like register_specialization, but for local declarations. We are |
1099 | registering SPEC, an instantiation of TMPL. */ | |
9188c363 | 1100 | |
414ea4aa | 1101 | static void |
6dfbb909 | 1102 | register_local_specialization (spec, tmpl) |
9188c363 MM |
1103 | tree spec; |
1104 | tree tmpl; | |
9188c363 | 1105 | { |
6dfbb909 MM |
1106 | void **slot; |
1107 | ||
69f794a7 MM |
1108 | slot = htab_find_slot_with_hash (local_specializations, tmpl, |
1109 | htab_hash_pointer (tmpl), INSERT); | |
a723baf1 | 1110 | *slot = build_tree_list (spec, tmpl); |
9188c363 MM |
1111 | } |
1112 | ||
e1467ff2 MM |
1113 | /* Print the list of candidate FNS in an error message. */ |
1114 | ||
104bf76a | 1115 | void |
e1467ff2 MM |
1116 | print_candidates (fns) |
1117 | tree fns; | |
1118 | { | |
1119 | tree fn; | |
1120 | ||
d8e178a0 | 1121 | const char *str = "candidates are:"; |
e1467ff2 MM |
1122 | |
1123 | for (fn = fns; fn != NULL_TREE; fn = TREE_CHAIN (fn)) | |
1124 | { | |
d6479fe7 MM |
1125 | tree f; |
1126 | ||
1127 | for (f = TREE_VALUE (fn); f; f = OVL_NEXT (f)) | |
1128 | cp_error_at ("%s %+#D", str, OVL_CURRENT (f)); | |
e1467ff2 MM |
1129 | str = " "; |
1130 | } | |
1131 | } | |
1132 | ||
75650646 | 1133 | /* Returns the template (one of the functions given by TEMPLATE_ID) |
e1467ff2 | 1134 | which can be specialized to match the indicated DECL with the |
03017874 MM |
1135 | explicit template args given in TEMPLATE_ID. The DECL may be |
1136 | NULL_TREE if none is available. In that case, the functions in | |
1137 | TEMPLATE_ID are non-members. | |
1138 | ||
838dfd8a | 1139 | If NEED_MEMBER_TEMPLATE is nonzero the function is known to be a |
03017874 MM |
1140 | specialization of a member template. |
1141 | ||
1142 | The template args (those explicitly specified and those deduced) | |
1143 | are output in a newly created vector *TARGS_OUT. | |
1144 | ||
1145 | If it is impossible to determine the result, an error message is | |
bf8f3f93 | 1146 | issued. The error_mark_node is returned to indicate failure. */ |
75650646 | 1147 | |
e9659ab0 | 1148 | static tree |
e1467ff2 | 1149 | determine_specialization (template_id, decl, targs_out, |
bf8f3f93 | 1150 | need_member_template) |
386b8a85 | 1151 | tree template_id; |
e1467ff2 | 1152 | tree decl; |
386b8a85 JM |
1153 | tree* targs_out; |
1154 | int need_member_template; | |
386b8a85 | 1155 | { |
03017874 MM |
1156 | tree fns; |
1157 | tree targs; | |
1158 | tree explicit_targs; | |
1159 | tree candidates = NULL_TREE; | |
1160 | tree templates = NULL_TREE; | |
386b8a85 | 1161 | |
e1467ff2 MM |
1162 | *targs_out = NULL_TREE; |
1163 | ||
f2e48b67 BK |
1164 | if (template_id == error_mark_node) |
1165 | return error_mark_node; | |
1166 | ||
1167 | fns = TREE_OPERAND (template_id, 0); | |
03017874 | 1168 | explicit_targs = TREE_OPERAND (template_id, 1); |
f2e48b67 | 1169 | |
27fafc8d JM |
1170 | if (fns == error_mark_node) |
1171 | return error_mark_node; | |
1172 | ||
c6002625 | 1173 | /* Check for baselinks. */ |
91e490ab | 1174 | if (BASELINK_P (fns)) |
da15dae6 | 1175 | fns = BASELINK_FUNCTIONS (fns); |
386b8a85 | 1176 | |
91e490ab MM |
1177 | if (!is_overloaded_fn (fns)) |
1178 | { | |
33bd39a2 | 1179 | error ("`%D' is not a function template", fns); |
91e490ab MM |
1180 | return error_mark_node; |
1181 | } | |
1182 | ||
2c73f9f5 | 1183 | for (; fns; fns = OVL_NEXT (fns)) |
386b8a85 | 1184 | { |
9dfce8fd | 1185 | tree fn = OVL_CURRENT (fns); |
03017874 MM |
1186 | |
1187 | if (TREE_CODE (fn) == TEMPLATE_DECL) | |
d955f6ea KL |
1188 | { |
1189 | tree decl_arg_types; | |
1190 | ||
1191 | /* DECL might be a specialization of FN. */ | |
1192 | ||
1193 | /* Adjust the type of DECL in case FN is a static member. */ | |
1194 | decl_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl)); | |
1195 | if (DECL_STATIC_FUNCTION_P (fn) | |
1196 | && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)) | |
1197 | decl_arg_types = TREE_CHAIN (decl_arg_types); | |
1198 | ||
1199 | /* Check that the number of function parameters matches. | |
1200 | For example, | |
1201 | template <class T> void f(int i = 0); | |
1202 | template <> void f<int>(); | |
0e339752 | 1203 | The specialization f<int> is invalid but is not caught |
d955f6ea KL |
1204 | by get_bindings below. */ |
1205 | ||
1206 | if (list_length (TYPE_ARG_TYPES (TREE_TYPE (fn))) | |
1207 | != list_length (decl_arg_types)) | |
1208 | continue; | |
1209 | ||
1210 | /* See whether this function might be a specialization of this | |
1211 | template. */ | |
1212 | targs = get_bindings (fn, decl, explicit_targs); | |
1213 | ||
1214 | if (!targs) | |
1215 | /* We cannot deduce template arguments that when used to | |
1216 | specialize TMPL will produce DECL. */ | |
1217 | continue; | |
1218 | ||
1219 | /* Save this template, and the arguments deduced. */ | |
1220 | templates = tree_cons (targs, fn, templates); | |
1221 | } | |
03017874 MM |
1222 | else if (need_member_template) |
1223 | /* FN is an ordinary member function, and we need a | |
1224 | specialization of a member template. */ | |
d955f6ea | 1225 | ; |
03017874 MM |
1226 | else if (TREE_CODE (fn) != FUNCTION_DECL) |
1227 | /* We can get IDENTIFIER_NODEs here in certain erroneous | |
1228 | cases. */ | |
d955f6ea | 1229 | ; |
03017874 MM |
1230 | else if (!DECL_FUNCTION_MEMBER_P (fn)) |
1231 | /* This is just an ordinary non-member function. Nothing can | |
1232 | be a specialization of that. */ | |
d955f6ea | 1233 | ; |
3b82c249 KL |
1234 | else if (DECL_ARTIFICIAL (fn)) |
1235 | /* Cannot specialize functions that are created implicitly. */ | |
d955f6ea | 1236 | ; |
75650646 | 1237 | else |
03017874 MM |
1238 | { |
1239 | tree decl_arg_types; | |
386b8a85 | 1240 | |
03017874 MM |
1241 | /* This is an ordinary member function. However, since |
1242 | we're here, we can assume it's enclosing class is a | |
1243 | template class. For example, | |
1244 | ||
1245 | template <typename T> struct S { void f(); }; | |
1246 | template <> void S<int>::f() {} | |
1247 | ||
1248 | Here, S<int>::f is a non-template, but S<int> is a | |
1249 | template class. If FN has the same type as DECL, we | |
1250 | might be in business. */ | |
f5d47abd KL |
1251 | |
1252 | if (!DECL_TEMPLATE_INFO (fn)) | |
1253 | /* Its enclosing class is an explicit specialization | |
1254 | of a template class. This is not a candidate. */ | |
1255 | continue; | |
1256 | ||
03017874 MM |
1257 | if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)), |
1258 | TREE_TYPE (TREE_TYPE (fn)))) | |
1259 | /* The return types differ. */ | |
1260 | continue; | |
1261 | ||
1262 | /* Adjust the type of DECL in case FN is a static member. */ | |
1263 | decl_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl)); | |
1264 | if (DECL_STATIC_FUNCTION_P (fn) | |
1265 | && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)) | |
1266 | decl_arg_types = TREE_CHAIN (decl_arg_types); | |
1267 | ||
1268 | if (compparms (TYPE_ARG_TYPES (TREE_TYPE (fn)), | |
1269 | decl_arg_types)) | |
1270 | /* They match! */ | |
1271 | candidates = tree_cons (NULL_TREE, fn, candidates); | |
03017874 | 1272 | } |
386b8a85 | 1273 | } |
03017874 | 1274 | |
bf8f3f93 | 1275 | if (templates && TREE_CHAIN (templates)) |
386b8a85 | 1276 | { |
03017874 MM |
1277 | /* We have: |
1278 | ||
1279 | [temp.expl.spec] | |
1280 | ||
1281 | It is possible for a specialization with a given function | |
1282 | signature to be instantiated from more than one function | |
1283 | template. In such cases, explicit specification of the | |
1284 | template arguments must be used to uniquely identify the | |
1285 | function template specialization being specialized. | |
1286 | ||
1287 | Note that here, there's no suggestion that we're supposed to | |
1288 | determine which of the candidate templates is most | |
1289 | specialized. However, we, also have: | |
1290 | ||
1291 | [temp.func.order] | |
1292 | ||
1293 | Partial ordering of overloaded function template | |
1294 | declarations is used in the following contexts to select | |
1295 | the function template to which a function template | |
1296 | specialization refers: | |
1297 | ||
1298 | -- when an explicit specialization refers to a function | |
1299 | template. | |
1300 | ||
1301 | So, we do use the partial ordering rules, at least for now. | |
0e339752 | 1302 | This extension can only serve to make invalid programs valid, |
03017874 MM |
1303 | so it's safe. And, there is strong anecdotal evidence that |
1304 | the committee intended the partial ordering rules to apply; | |
1305 | the EDG front-end has that behavior, and John Spicer claims | |
1306 | that the committee simply forgot to delete the wording in | |
1307 | [temp.expl.spec]. */ | |
1308 | tree tmpl = most_specialized (templates, decl, explicit_targs); | |
1309 | if (tmpl && tmpl != error_mark_node) | |
1310 | { | |
1311 | targs = get_bindings (tmpl, decl, explicit_targs); | |
e1b3e07d | 1312 | templates = tree_cons (targs, tmpl, NULL_TREE); |
03017874 | 1313 | } |
e1467ff2 MM |
1314 | } |
1315 | ||
03017874 | 1316 | if (templates == NULL_TREE && candidates == NULL_TREE) |
e1467ff2 | 1317 | { |
bf8f3f93 MM |
1318 | cp_error_at ("template-id `%D' for `%+D' does not match any template declaration", |
1319 | template_id, decl); | |
03017874 | 1320 | return error_mark_node; |
386b8a85 | 1321 | } |
03017874 | 1322 | else if ((templates && TREE_CHAIN (templates)) |
bf8f3f93 MM |
1323 | || (candidates && TREE_CHAIN (candidates)) |
1324 | || (templates && candidates)) | |
386b8a85 | 1325 | { |
bf8f3f93 MM |
1326 | cp_error_at ("ambiguous template specialization `%D' for `%+D'", |
1327 | template_id, decl); | |
1328 | chainon (candidates, templates); | |
1329 | print_candidates (candidates); | |
03017874 | 1330 | return error_mark_node; |
386b8a85 JM |
1331 | } |
1332 | ||
c6002625 | 1333 | /* We have one, and exactly one, match. */ |
03017874 MM |
1334 | if (candidates) |
1335 | { | |
1336 | /* It was a specialization of an ordinary member function in a | |
1337 | template class. */ | |
1338 | *targs_out = copy_node (DECL_TI_ARGS (TREE_VALUE (candidates))); | |
1339 | return DECL_TI_TEMPLATE (TREE_VALUE (candidates)); | |
1340 | } | |
1341 | ||
1342 | /* It was a specialization of a template. */ | |
17aec3eb | 1343 | targs = DECL_TI_ARGS (DECL_TEMPLATE_RESULT (TREE_VALUE (templates))); |
03017874 MM |
1344 | if (TMPL_ARGS_HAVE_MULTIPLE_LEVELS (targs)) |
1345 | { | |
1346 | *targs_out = copy_node (targs); | |
1347 | SET_TMPL_ARGS_LEVEL (*targs_out, | |
1348 | TMPL_ARGS_DEPTH (*targs_out), | |
1349 | TREE_PURPOSE (templates)); | |
1350 | } | |
1351 | else | |
1352 | *targs_out = TREE_PURPOSE (templates); | |
e1467ff2 | 1353 | return TREE_VALUE (templates); |
8d08fdba | 1354 | } |
8afa707f MM |
1355 | |
1356 | /* Returns a chain of parameter types, exactly like the SPEC_TYPES, | |
1357 | but with the default argument values filled in from those in the | |
1358 | TMPL_TYPES. */ | |
6757edfe | 1359 | |
8afa707f MM |
1360 | static tree |
1361 | copy_default_args_to_explicit_spec_1 (spec_types, | |
1362 | tmpl_types) | |
1363 | tree spec_types; | |
1364 | tree tmpl_types; | |
1365 | { | |
1366 | tree new_spec_types; | |
1367 | ||
1368 | if (!spec_types) | |
1369 | return NULL_TREE; | |
1370 | ||
1371 | if (spec_types == void_list_node) | |
1372 | return void_list_node; | |
1373 | ||
1374 | /* Substitute into the rest of the list. */ | |
1375 | new_spec_types = | |
1376 | copy_default_args_to_explicit_spec_1 (TREE_CHAIN (spec_types), | |
1377 | TREE_CHAIN (tmpl_types)); | |
1378 | ||
1379 | /* Add the default argument for this parameter. */ | |
1380 | return hash_tree_cons (TREE_PURPOSE (tmpl_types), | |
1381 | TREE_VALUE (spec_types), | |
1382 | new_spec_types); | |
1383 | } | |
1384 | ||
1385 | /* DECL is an explicit specialization. Replicate default arguments | |
1386 | from the template it specializes. (That way, code like: | |
1387 | ||
1388 | template <class T> void f(T = 3); | |
1389 | template <> void f(double); | |
1390 | void g () { f (); } | |
1391 | ||
1392 | works, as required.) An alternative approach would be to look up | |
1393 | the correct default arguments at the call-site, but this approach | |
1394 | is consistent with how implicit instantiations are handled. */ | |
1395 | ||
1396 | static void | |
1397 | copy_default_args_to_explicit_spec (decl) | |
1398 | tree decl; | |
1399 | { | |
1400 | tree tmpl; | |
1401 | tree spec_types; | |
1402 | tree tmpl_types; | |
1403 | tree new_spec_types; | |
1404 | tree old_type; | |
1405 | tree new_type; | |
1406 | tree t; | |
08c2df0f NS |
1407 | tree object_type = NULL_TREE; |
1408 | tree in_charge = NULL_TREE; | |
e0fff4b3 | 1409 | tree vtt = NULL_TREE; |
8afa707f MM |
1410 | |
1411 | /* See if there's anything we need to do. */ | |
1412 | tmpl = DECL_TI_TEMPLATE (decl); | |
1413 | tmpl_types = TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (tmpl))); | |
1414 | for (t = tmpl_types; t; t = TREE_CHAIN (t)) | |
1415 | if (TREE_PURPOSE (t)) | |
1416 | break; | |
1417 | if (!t) | |
1418 | return; | |
1419 | ||
1420 | old_type = TREE_TYPE (decl); | |
1421 | spec_types = TYPE_ARG_TYPES (old_type); | |
1422 | ||
8afa707f MM |
1423 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)) |
1424 | { | |
08c2df0f NS |
1425 | /* Remove the this pointer, but remember the object's type for |
1426 | CV quals. */ | |
1427 | object_type = TREE_TYPE (TREE_VALUE (spec_types)); | |
8afa707f MM |
1428 | spec_types = TREE_CHAIN (spec_types); |
1429 | tmpl_types = TREE_CHAIN (tmpl_types); | |
08c2df0f | 1430 | |
8afa707f | 1431 | if (DECL_HAS_IN_CHARGE_PARM_P (decl)) |
08c2df0f NS |
1432 | { |
1433 | /* DECL may contain more parameters than TMPL due to the extra | |
1434 | in-charge parameter in constructors and destructors. */ | |
1435 | in_charge = spec_types; | |
1436 | spec_types = TREE_CHAIN (spec_types); | |
1437 | } | |
e0fff4b3 JM |
1438 | if (DECL_HAS_VTT_PARM_P (decl)) |
1439 | { | |
1440 | vtt = spec_types; | |
1441 | spec_types = TREE_CHAIN (spec_types); | |
1442 | } | |
8afa707f MM |
1443 | } |
1444 | ||
1445 | /* Compute the merged default arguments. */ | |
1446 | new_spec_types = | |
1447 | copy_default_args_to_explicit_spec_1 (spec_types, tmpl_types); | |
1448 | ||
08c2df0f NS |
1449 | /* Compute the new FUNCTION_TYPE. */ |
1450 | if (object_type) | |
8afa707f | 1451 | { |
e0fff4b3 JM |
1452 | if (vtt) |
1453 | new_spec_types = hash_tree_cons (TREE_PURPOSE (vtt), | |
1454 | TREE_VALUE (vtt), | |
1455 | new_spec_types); | |
1456 | ||
08c2df0f NS |
1457 | if (in_charge) |
1458 | /* Put the in-charge parameter back. */ | |
1459 | new_spec_types = hash_tree_cons (TREE_PURPOSE (in_charge), | |
1460 | TREE_VALUE (in_charge), | |
1461 | new_spec_types); | |
1462 | ||
1463 | new_type = build_cplus_method_type (object_type, | |
1464 | TREE_TYPE (old_type), | |
1465 | new_spec_types); | |
8afa707f | 1466 | } |
8afa707f MM |
1467 | else |
1468 | new_type = build_function_type (TREE_TYPE (old_type), | |
08c2df0f | 1469 | new_spec_types); |
8afa707f MM |
1470 | new_type = build_type_attribute_variant (new_type, |
1471 | TYPE_ATTRIBUTES (old_type)); | |
1472 | new_type = build_exception_variant (new_type, | |
1473 | TYPE_RAISES_EXCEPTIONS (old_type)); | |
1474 | TREE_TYPE (decl) = new_type; | |
1475 | } | |
1476 | ||
386b8a85 | 1477 | /* Check to see if the function just declared, as indicated in |
75650646 MM |
1478 | DECLARATOR, and in DECL, is a specialization of a function |
1479 | template. We may also discover that the declaration is an explicit | |
1480 | instantiation at this point. | |
1481 | ||
e1467ff2 | 1482 | Returns DECL, or an equivalent declaration that should be used |
03017874 MM |
1483 | instead if all goes well. Issues an error message if something is |
1484 | amiss. Returns error_mark_node if the error is not easily | |
1485 | recoverable. | |
75650646 | 1486 | |
75650646 MM |
1487 | FLAGS is a bitmask consisting of the following flags: |
1488 | ||
75650646 MM |
1489 | 2: The function has a definition. |
1490 | 4: The function is a friend. | |
75650646 MM |
1491 | |
1492 | The TEMPLATE_COUNT is the number of references to qualifying | |
1493 | template classes that appeared in the name of the function. For | |
1494 | example, in | |
1495 | ||
1496 | template <class T> struct S { void f(); }; | |
1497 | void S<int>::f(); | |
1498 | ||
1499 | the TEMPLATE_COUNT would be 1. However, explicitly specialized | |
1500 | classes are not counted in the TEMPLATE_COUNT, so that in | |
1501 | ||
1502 | template <class T> struct S {}; | |
1503 | template <> struct S<int> { void f(); } | |
36a117a5 | 1504 | template <> void S<int>::f(); |
75650646 MM |
1505 | |
1506 | the TEMPLATE_COUNT would be 0. (Note that this declaration is | |
0e339752 | 1507 | invalid; there should be no template <>.) |
75650646 MM |
1508 | |
1509 | If the function is a specialization, it is marked as such via | |
1510 | DECL_TEMPLATE_SPECIALIZATION. Furthermore, its DECL_TEMPLATE_INFO | |
1511 | is set up correctly, and it is added to the list of specializations | |
1512 | for that template. */ | |
386b8a85 | 1513 | |
e1467ff2 | 1514 | tree |
27bb8339 | 1515 | check_explicit_specialization (declarator, decl, template_count, flags) |
386b8a85 JM |
1516 | tree declarator; |
1517 | tree decl; | |
1518 | int template_count; | |
1519 | int flags; | |
1520 | { | |
75650646 MM |
1521 | int have_def = flags & 2; |
1522 | int is_friend = flags & 4; | |
1523 | int specialization = 0; | |
e1467ff2 | 1524 | int explicit_instantiation = 0; |
fd4de5ff | 1525 | int member_specialization = 0; |
75650646 MM |
1526 | tree ctype = DECL_CLASS_CONTEXT (decl); |
1527 | tree dname = DECL_NAME (decl); | |
74b846e0 | 1528 | tmpl_spec_kind tsk; |
386b8a85 | 1529 | |
74b846e0 | 1530 | tsk = current_tmpl_spec_kind (template_count); |
75650646 | 1531 | |
74b846e0 MM |
1532 | switch (tsk) |
1533 | { | |
1534 | case tsk_none: | |
1535 | if (processing_specialization) | |
75650646 | 1536 | { |
fd4de5ff MM |
1537 | specialization = 1; |
1538 | SET_DECL_TEMPLATE_SPECIALIZATION (decl); | |
75650646 | 1539 | } |
74b846e0 | 1540 | else if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR) |
386b8a85 | 1541 | { |
74b846e0 MM |
1542 | if (is_friend) |
1543 | /* This could be something like: | |
75650646 | 1544 | |
74b846e0 MM |
1545 | template <class T> void f(T); |
1546 | class S { friend void f<>(int); } */ | |
1547 | specialization = 1; | |
1548 | else | |
1549 | { | |
1550 | /* This case handles bogus declarations like template <> | |
1551 | template <class T> void f<int>(); */ | |
1552 | ||
33bd39a2 | 1553 | error ("template-id `%D' in declaration of primary template", |
74b846e0 MM |
1554 | declarator); |
1555 | return decl; | |
1556 | } | |
1557 | } | |
1558 | break; | |
1559 | ||
1560 | case tsk_invalid_member_spec: | |
1561 | /* The error has already been reported in | |
1562 | check_specialization_scope. */ | |
1563 | return error_mark_node; | |
1564 | ||
1565 | case tsk_invalid_expl_inst: | |
33bd39a2 | 1566 | error ("template parameter list used in explicit instantiation"); |
74b846e0 MM |
1567 | |
1568 | /* Fall through. */ | |
1569 | ||
1570 | case tsk_expl_inst: | |
fd4de5ff | 1571 | if (have_def) |
33bd39a2 | 1572 | error ("definition provided for explicit instantiation"); |
74b846e0 | 1573 | |
fd4de5ff | 1574 | explicit_instantiation = 1; |
74b846e0 | 1575 | break; |
fd4de5ff | 1576 | |
74b846e0 | 1577 | case tsk_excessive_parms: |
33bd39a2 | 1578 | error ("too many template parameter lists in declaration of `%D'", |
74b846e0 MM |
1579 | decl); |
1580 | return error_mark_node; | |
75650646 | 1581 | |
74b846e0 MM |
1582 | /* Fall through. */ |
1583 | case tsk_expl_spec: | |
1584 | SET_DECL_TEMPLATE_SPECIALIZATION (decl); | |
1585 | if (ctype) | |
1586 | member_specialization = 1; | |
1587 | else | |
1588 | specialization = 1; | |
1589 | break; | |
1590 | ||
1591 | case tsk_insufficient_parms: | |
fd4de5ff MM |
1592 | if (template_header_count) |
1593 | { | |
33bd39a2 | 1594 | error("too few template parameter lists in declaration of `%D'", |
74b846e0 | 1595 | decl); |
fd4de5ff | 1596 | return decl; |
c6f2ed0d | 1597 | } |
74b846e0 MM |
1598 | else if (ctype != NULL_TREE |
1599 | && !TYPE_BEING_DEFINED (ctype) | |
1600 | && CLASSTYPE_TEMPLATE_INSTANTIATION (ctype) | |
1601 | && !is_friend) | |
1602 | { | |
1603 | /* For backwards compatibility, we accept: | |
fd4de5ff | 1604 | |
74b846e0 MM |
1605 | template <class T> struct S { void f(); }; |
1606 | void S<int>::f() {} // Missing template <> | |
fd4de5ff | 1607 | |
0e339752 | 1608 | That used to be valid C++. */ |
74b846e0 | 1609 | if (pedantic) |
33bd39a2 | 1610 | pedwarn |
74b846e0 MM |
1611 | ("explicit specialization not preceded by `template <>'"); |
1612 | specialization = 1; | |
1613 | SET_DECL_TEMPLATE_SPECIALIZATION (decl); | |
1614 | } | |
1615 | break; | |
1616 | ||
1617 | case tsk_template: | |
1618 | if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR) | |
c6f2ed0d | 1619 | { |
fd4de5ff MM |
1620 | /* This case handles bogus declarations like template <> |
1621 | template <class T> void f<int>(); */ | |
75650646 | 1622 | |
655dc6ee | 1623 | if (uses_template_parms (declarator)) |
33bd39a2 | 1624 | error ("partial specialization `%D' of function template", |
655dc6ee JM |
1625 | declarator); |
1626 | else | |
33bd39a2 | 1627 | error ("template-id `%D' in declaration of primary template", |
655dc6ee | 1628 | declarator); |
fd4de5ff | 1629 | return decl; |
386b8a85 | 1630 | } |
74b846e0 MM |
1631 | |
1632 | if (ctype && CLASSTYPE_TEMPLATE_INSTANTIATION (ctype)) | |
1633 | /* This is a specialization of a member template, without | |
1634 | specialization the containing class. Something like: | |
1635 | ||
1636 | template <class T> struct S { | |
1637 | template <class U> void f (U); | |
1638 | }; | |
1639 | template <> template <class U> void S<int>::f(U) {} | |
1640 | ||
1641 | That's a specialization -- but of the entire template. */ | |
1642 | specialization = 1; | |
1643 | break; | |
1644 | ||
1645 | default: | |
a98facb0 | 1646 | abort (); |
75650646 | 1647 | } |
386b8a85 | 1648 | |
670960ac JM |
1649 | if (specialization || member_specialization) |
1650 | { | |
1651 | tree t = TYPE_ARG_TYPES (TREE_TYPE (decl)); | |
1652 | for (; t; t = TREE_CHAIN (t)) | |
1653 | if (TREE_PURPOSE (t)) | |
1654 | { | |
33bd39a2 | 1655 | pedwarn |
8251199e | 1656 | ("default argument specified in explicit specialization"); |
670960ac JM |
1657 | break; |
1658 | } | |
f3400fe2 | 1659 | if (current_lang_name == lang_name_c) |
33bd39a2 | 1660 | error ("template specialization with C linkage"); |
670960ac JM |
1661 | } |
1662 | ||
e1467ff2 | 1663 | if (specialization || member_specialization || explicit_instantiation) |
75650646 MM |
1664 | { |
1665 | tree tmpl = NULL_TREE; | |
1666 | tree targs = NULL_TREE; | |
75650646 MM |
1667 | |
1668 | /* Make sure that the declarator is a TEMPLATE_ID_EXPR. */ | |
386b8a85 JM |
1669 | if (TREE_CODE (declarator) != TEMPLATE_ID_EXPR) |
1670 | { | |
1671 | tree fns; | |
1672 | ||
1673 | my_friendly_assert (TREE_CODE (declarator) == IDENTIFIER_NODE, | |
1674 | 0); | |
1675 | if (!ctype) | |
30394414 | 1676 | fns = IDENTIFIER_NAMESPACE_VALUE (dname); |
386b8a85 JM |
1677 | else |
1678 | fns = dname; | |
1679 | ||
75650646 MM |
1680 | declarator = |
1681 | lookup_template_function (fns, NULL_TREE); | |
386b8a85 JM |
1682 | } |
1683 | ||
f2e48b67 BK |
1684 | if (declarator == error_mark_node) |
1685 | return error_mark_node; | |
1686 | ||
75650646 MM |
1687 | if (ctype != NULL_TREE && TYPE_BEING_DEFINED (ctype)) |
1688 | { | |
8ec2ac34 | 1689 | if (!explicit_instantiation) |
0e339752 | 1690 | /* A specialization in class scope. This is invalid, |
6c30752f MM |
1691 | but the error will already have been flagged by |
1692 | check_specialization_scope. */ | |
1693 | return error_mark_node; | |
8ec2ac34 | 1694 | else |
b370501f | 1695 | { |
0e339752 | 1696 | /* It's not valid to write an explicit instantiation in |
b370501f | 1697 | class scope, e.g.: |
8ec2ac34 | 1698 | |
b370501f | 1699 | class C { template void f(); } |
8ec2ac34 | 1700 | |
b370501f KG |
1701 | This case is caught by the parser. However, on |
1702 | something like: | |
8ec2ac34 | 1703 | |
b370501f | 1704 | template class C { void f(); }; |
8ec2ac34 | 1705 | |
0e339752 | 1706 | (which is invalid) we can get here. The error will be |
b370501f KG |
1707 | issued later. */ |
1708 | ; | |
1709 | } | |
8ec2ac34 | 1710 | |
e1467ff2 | 1711 | return decl; |
75650646 | 1712 | } |
8f032717 MM |
1713 | else if (TREE_CODE (TREE_OPERAND (declarator, 0)) == LOOKUP_EXPR) |
1714 | { | |
1715 | /* A friend declaration. We can't do much, because we don't | |
08c2df0f | 1716 | know what this resolves to, yet. */ |
8f032717 MM |
1717 | my_friendly_assert (is_friend != 0, 0); |
1718 | my_friendly_assert (!explicit_instantiation, 0); | |
1719 | SET_DECL_IMPLICIT_INSTANTIATION (decl); | |
1720 | return decl; | |
1721 | } | |
75650646 MM |
1722 | else if (ctype != NULL_TREE |
1723 | && (TREE_CODE (TREE_OPERAND (declarator, 0)) == | |
1724 | IDENTIFIER_NODE)) | |
386b8a85 | 1725 | { |
75650646 MM |
1726 | /* Find the list of functions in ctype that have the same |
1727 | name as the declared function. */ | |
1728 | tree name = TREE_OPERAND (declarator, 0); | |
03017874 MM |
1729 | tree fns = NULL_TREE; |
1730 | int idx; | |
1731 | ||
8ba658ee | 1732 | if (constructor_name_p (name, ctype)) |
386b8a85 | 1733 | { |
75650646 MM |
1734 | int is_constructor = DECL_CONSTRUCTOR_P (decl); |
1735 | ||
1736 | if (is_constructor ? !TYPE_HAS_CONSTRUCTOR (ctype) | |
1737 | : !TYPE_HAS_DESTRUCTOR (ctype)) | |
1738 | { | |
1739 | /* From [temp.expl.spec]: | |
e1467ff2 | 1740 | |
75650646 MM |
1741 | If such an explicit specialization for the member |
1742 | of a class template names an implicitly-declared | |
1743 | special member function (clause _special_), the | |
e1467ff2 MM |
1744 | program is ill-formed. |
1745 | ||
1746 | Similar language is found in [temp.explicit]. */ | |
33bd39a2 | 1747 | error ("specialization of implicitly-declared special member function"); |
03017874 | 1748 | return error_mark_node; |
75650646 | 1749 | } |
386b8a85 | 1750 | |
42da2fd8 | 1751 | name = is_constructor ? ctor_identifier : dtor_identifier; |
75650646 | 1752 | } |
42da2fd8 | 1753 | |
421844e7 | 1754 | if (!DECL_CONV_FN_P (decl)) |
03017874 MM |
1755 | { |
1756 | idx = lookup_fnfields_1 (ctype, name); | |
1757 | if (idx >= 0) | |
1758 | fns = TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (ctype), idx); | |
1759 | } | |
1760 | else | |
1761 | { | |
1762 | tree methods; | |
1763 | ||
1764 | /* For a type-conversion operator, we cannot do a | |
1765 | name-based lookup. We might be looking for `operator | |
1766 | int' which will be a specialization of `operator T'. | |
1767 | So, we find *all* the conversion operators, and then | |
1768 | select from them. */ | |
1769 | fns = NULL_TREE; | |
1770 | ||
1771 | methods = CLASSTYPE_METHOD_VEC (ctype); | |
1772 | if (methods) | |
5dd236e2 NS |
1773 | for (idx = CLASSTYPE_FIRST_CONVERSION_SLOT; |
1774 | idx < TREE_VEC_LENGTH (methods); ++idx) | |
03017874 MM |
1775 | { |
1776 | tree ovl = TREE_VEC_ELT (methods, idx); | |
1777 | ||
1778 | if (!ovl || !DECL_CONV_FN_P (OVL_CURRENT (ovl))) | |
1779 | /* There are no more conversion functions. */ | |
1780 | break; | |
1781 | ||
1782 | /* Glue all these conversion functions together | |
1783 | with those we already have. */ | |
1784 | for (; ovl; ovl = OVL_NEXT (ovl)) | |
1785 | fns = ovl_cons (OVL_CURRENT (ovl), fns); | |
1786 | } | |
1787 | } | |
1788 | ||
386b8a85 JM |
1789 | if (fns == NULL_TREE) |
1790 | { | |
33bd39a2 | 1791 | error ("no member function `%D' declared in `%T'", |
b3f738da | 1792 | name, ctype); |
03017874 | 1793 | return error_mark_node; |
386b8a85 JM |
1794 | } |
1795 | else | |
1796 | TREE_OPERAND (declarator, 0) = fns; | |
1797 | } | |
75650646 | 1798 | |
e1467ff2 MM |
1799 | /* Figure out what exactly is being specialized at this point. |
1800 | Note that for an explicit instantiation, even one for a | |
38e01259 | 1801 | member function, we cannot tell apriori whether the |
e1467ff2 | 1802 | instantiation is for a member template, or just a member |
36a117a5 MM |
1803 | function of a template class. Even if a member template is |
1804 | being instantiated, the member template arguments may be | |
1805 | elided if they can be deduced from the rest of the | |
1806 | declaration. */ | |
e1467ff2 MM |
1807 | tmpl = determine_specialization (declarator, decl, |
1808 | &targs, | |
bf8f3f93 | 1809 | member_specialization); |
386b8a85 | 1810 | |
03017874 MM |
1811 | if (!tmpl || tmpl == error_mark_node) |
1812 | /* We couldn't figure out what this declaration was | |
1813 | specializing. */ | |
1814 | return error_mark_node; | |
1815 | else | |
386b8a85 | 1816 | { |
25aab5d0 | 1817 | tree gen_tmpl = most_general_template (tmpl); |
36a117a5 | 1818 | |
e1467ff2 MM |
1819 | if (explicit_instantiation) |
1820 | { | |
03d0f4af | 1821 | /* We don't set DECL_EXPLICIT_INSTANTIATION here; that |
25aab5d0 MM |
1822 | is done by do_decl_instantiation later. */ |
1823 | ||
1824 | int arg_depth = TMPL_ARGS_DEPTH (targs); | |
1825 | int parm_depth = TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (tmpl)); | |
1826 | ||
1827 | if (arg_depth > parm_depth) | |
1828 | { | |
1829 | /* If TMPL is not the most general template (for | |
1830 | example, if TMPL is a friend template that is | |
1831 | injected into namespace scope), then there will | |
dc957d14 | 1832 | be too many levels of TARGS. Remove some of them |
25aab5d0 MM |
1833 | here. */ |
1834 | int i; | |
1835 | tree new_targs; | |
1836 | ||
f31c0a32 | 1837 | new_targs = make_tree_vec (parm_depth); |
25aab5d0 MM |
1838 | for (i = arg_depth - parm_depth; i < arg_depth; ++i) |
1839 | TREE_VEC_ELT (new_targs, i - (arg_depth - parm_depth)) | |
1840 | = TREE_VEC_ELT (targs, i); | |
1841 | targs = new_targs; | |
1842 | } | |
1843 | ||
3e4a3562 | 1844 | return instantiate_template (tmpl, targs, tf_error); |
e1467ff2 | 1845 | } |
74b846e0 | 1846 | |
f9a7ae04 MM |
1847 | /* If this is a specialization of a member template of a |
1848 | template class. In we want to return the TEMPLATE_DECL, | |
1849 | not the specialization of it. */ | |
74b846e0 MM |
1850 | if (tsk == tsk_template) |
1851 | { | |
1852 | SET_DECL_TEMPLATE_SPECIALIZATION (tmpl); | |
f9a7ae04 | 1853 | DECL_INITIAL (DECL_TEMPLATE_RESULT (tmpl)) = NULL_TREE; |
74b846e0 MM |
1854 | return tmpl; |
1855 | } | |
1856 | ||
08c2df0f | 1857 | /* If we thought that the DECL was a member function, but it |
36a117a5 MM |
1858 | turns out to be specializing a static member function, |
1859 | make DECL a static member function as well. */ | |
1860 | if (DECL_STATIC_FUNCTION_P (tmpl) | |
1861 | && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)) | |
366c0f1e | 1862 | { |
3afb32a4 | 1863 | revert_static_member_fn (decl); |
366c0f1e MM |
1864 | last_function_parms = TREE_CHAIN (last_function_parms); |
1865 | } | |
e1467ff2 | 1866 | |
36a117a5 | 1867 | /* Set up the DECL_TEMPLATE_INFO for DECL. */ |
e1b3e07d | 1868 | DECL_TEMPLATE_INFO (decl) = tree_cons (tmpl, targs, NULL_TREE); |
36a117a5 | 1869 | |
8afa707f MM |
1870 | /* Inherit default function arguments from the template |
1871 | DECL is specializing. */ | |
1872 | copy_default_args_to_explicit_spec (decl); | |
1873 | ||
c750255c MM |
1874 | /* This specialization has the same protection as the |
1875 | template it specializes. */ | |
1876 | TREE_PRIVATE (decl) = TREE_PRIVATE (gen_tmpl); | |
1877 | TREE_PROTECTED (decl) = TREE_PROTECTED (gen_tmpl); | |
1878 | ||
386b8a85 | 1879 | if (is_friend && !have_def) |
36a117a5 MM |
1880 | /* This is not really a declaration of a specialization. |
1881 | It's just the name of an instantiation. But, it's not | |
1882 | a request for an instantiation, either. */ | |
fbf1c34b | 1883 | SET_DECL_IMPLICIT_INSTANTIATION (decl); |
08511114 KL |
1884 | else if (DECL_CONSTRUCTOR_P (decl) || DECL_DESTRUCTOR_P (decl)) |
1885 | /* This is indeed a specialization. In case of constructors | |
1886 | and destructors, we need in-charge and not-in-charge | |
1887 | versions in V3 ABI. */ | |
1888 | clone_function_decl (decl, /*update_method_vec_p=*/0); | |
75650646 | 1889 | |
36a117a5 MM |
1890 | /* Register this specialization so that we can find it |
1891 | again. */ | |
1892 | decl = register_specialization (decl, gen_tmpl, targs); | |
386b8a85 JM |
1893 | } |
1894 | } | |
75650646 | 1895 | |
e1467ff2 | 1896 | return decl; |
386b8a85 | 1897 | } |
75650646 | 1898 | |
39c01e4c MM |
1899 | /* TYPE is being declared. Verify that the use of template headers |
1900 | and such is reasonable. Issue error messages if not. */ | |
1901 | ||
1902 | void | |
1903 | maybe_check_template_type (type) | |
1904 | tree type; | |
1905 | { | |
1906 | if (template_header_count) | |
1907 | { | |
1908 | /* We are in the scope of some `template <...>' header. */ | |
1909 | ||
1910 | int context_depth | |
1911 | = template_class_depth_real (TYPE_CONTEXT (type), | |
1912 | /*count_specializations=*/1); | |
1913 | ||
1914 | if (template_header_count <= context_depth) | |
1915 | /* This is OK; the template headers are for the context. We | |
1916 | are actually too lenient here; like | |
1917 | check_explicit_specialization we should consider the number | |
1918 | of template types included in the actual declaration. For | |
1919 | example, | |
1920 | ||
1921 | template <class T> struct S { | |
1922 | template <class U> template <class V> | |
1923 | struct I {}; | |
1924 | }; | |
1925 | ||
0e339752 | 1926 | is invalid, but: |
39c01e4c MM |
1927 | |
1928 | template <class T> struct S { | |
1929 | template <class U> struct I; | |
1930 | }; | |
1931 | ||
1932 | template <class T> template <class U. | |
1933 | struct S<T>::I {}; | |
1934 | ||
1935 | is not. */ | |
1936 | ; | |
1937 | else if (template_header_count > context_depth + 1) | |
1938 | /* There are two many template parameter lists. */ | |
33bd39a2 | 1939 | error ("too many template parameter lists in declaration of `%T'", type); |
39c01e4c MM |
1940 | } |
1941 | } | |
1942 | ||
75650646 MM |
1943 | /* Returns 1 iff PARMS1 and PARMS2 are identical sets of template |
1944 | parameters. These are represented in the same format used for | |
1945 | DECL_TEMPLATE_PARMS. */ | |
1946 | ||
1947 | int comp_template_parms (parms1, parms2) | |
1948 | tree parms1; | |
1949 | tree parms2; | |
1950 | { | |
1951 | tree p1; | |
1952 | tree p2; | |
1953 | ||
1954 | if (parms1 == parms2) | |
1955 | return 1; | |
1956 | ||
1957 | for (p1 = parms1, p2 = parms2; | |
1958 | p1 != NULL_TREE && p2 != NULL_TREE; | |
1959 | p1 = TREE_CHAIN (p1), p2 = TREE_CHAIN (p2)) | |
1960 | { | |
1961 | tree t1 = TREE_VALUE (p1); | |
1962 | tree t2 = TREE_VALUE (p2); | |
1963 | int i; | |
1964 | ||
1965 | my_friendly_assert (TREE_CODE (t1) == TREE_VEC, 0); | |
1966 | my_friendly_assert (TREE_CODE (t2) == TREE_VEC, 0); | |
1967 | ||
1968 | if (TREE_VEC_LENGTH (t1) != TREE_VEC_LENGTH (t2)) | |
1969 | return 0; | |
1970 | ||
1971 | for (i = 0; i < TREE_VEC_LENGTH (t2); ++i) | |
1972 | { | |
1973 | tree parm1 = TREE_VALUE (TREE_VEC_ELT (t1, i)); | |
1974 | tree parm2 = TREE_VALUE (TREE_VEC_ELT (t2, i)); | |
1975 | ||
1976 | if (TREE_CODE (parm1) != TREE_CODE (parm2)) | |
1977 | return 0; | |
1978 | ||
1979 | if (TREE_CODE (parm1) == TEMPLATE_TYPE_PARM) | |
1980 | continue; | |
3bfdc719 | 1981 | else if (!same_type_p (TREE_TYPE (parm1), TREE_TYPE (parm2))) |
75650646 MM |
1982 | return 0; |
1983 | } | |
1984 | } | |
1985 | ||
1986 | if ((p1 != NULL_TREE) != (p2 != NULL_TREE)) | |
1987 | /* One set of parameters has more parameters lists than the | |
1988 | other. */ | |
1989 | return 0; | |
1990 | ||
1991 | return 1; | |
1992 | } | |
1993 | ||
f3400fe2 JM |
1994 | /* Complain if DECL shadows a template parameter. |
1995 | ||
1996 | [temp.local]: A template-parameter shall not be redeclared within its | |
1997 | scope (including nested scopes). */ | |
1998 | ||
1999 | void | |
2000 | check_template_shadow (decl) | |
2001 | tree decl; | |
2002 | { | |
8f032717 MM |
2003 | tree olddecl; |
2004 | ||
b5d9b9ab MM |
2005 | /* If we're not in a template, we can't possibly shadow a template |
2006 | parameter. */ | |
2007 | if (!current_template_parms) | |
2008 | return; | |
2009 | ||
2010 | /* Figure out what we're shadowing. */ | |
8f032717 MM |
2011 | if (TREE_CODE (decl) == OVERLOAD) |
2012 | decl = OVL_CURRENT (decl); | |
2013 | olddecl = IDENTIFIER_VALUE (DECL_NAME (decl)); | |
f3400fe2 | 2014 | |
b5d9b9ab MM |
2015 | /* If there's no previous binding for this name, we're not shadowing |
2016 | anything, let alone a template parameter. */ | |
2017 | if (!olddecl) | |
2018 | return; | |
2019 | ||
2020 | /* If we're not shadowing a template parameter, we're done. Note | |
2021 | that OLDDECL might be an OVERLOAD (or perhaps even an | |
2022 | ERROR_MARK), so we can't just blithely assume it to be a _DECL | |
2023 | node. */ | |
2f939d94 | 2024 | if (!DECL_P (olddecl) || !DECL_TEMPLATE_PARM_P (olddecl)) |
b5d9b9ab MM |
2025 | return; |
2026 | ||
2027 | /* We check for decl != olddecl to avoid bogus errors for using a | |
2028 | name inside a class. We check TPFI to avoid duplicate errors for | |
2029 | inline member templates. */ | |
2030 | if (decl == olddecl | |
2031 | || TEMPLATE_PARMS_FOR_INLINE (current_template_parms)) | |
2032 | return; | |
2033 | ||
2034 | cp_error_at ("declaration of `%#D'", decl); | |
2035 | cp_error_at (" shadows template parm `%#D'", olddecl); | |
f3400fe2 | 2036 | } |
22a7be53 | 2037 | |
f3400fe2 | 2038 | /* Return a new TEMPLATE_PARM_INDEX with the indicated INDEX, LEVEL, |
f84b4be9 JM |
2039 | ORIG_LEVEL, DECL, and TYPE. */ |
2040 | ||
2041 | static tree | |
2042 | build_template_parm_index (index, level, orig_level, decl, type) | |
2043 | int index; | |
2044 | int level; | |
2045 | int orig_level; | |
2046 | tree decl; | |
2047 | tree type; | |
2048 | { | |
2049 | tree t = make_node (TEMPLATE_PARM_INDEX); | |
2050 | TEMPLATE_PARM_IDX (t) = index; | |
2051 | TEMPLATE_PARM_LEVEL (t) = level; | |
2052 | TEMPLATE_PARM_ORIG_LEVEL (t) = orig_level; | |
2053 | TEMPLATE_PARM_DECL (t) = decl; | |
2054 | TREE_TYPE (t) = type; | |
3e4a3562 NS |
2055 | TREE_CONSTANT (t) = TREE_CONSTANT (decl); |
2056 | TREE_READONLY (t) = TREE_READONLY (decl); | |
f84b4be9 JM |
2057 | |
2058 | return t; | |
2059 | } | |
2060 | ||
f84b4be9 | 2061 | /* Return a TEMPLATE_PARM_INDEX, similar to INDEX, but whose |
93cdc044 | 2062 | TEMPLATE_PARM_LEVEL has been decreased by LEVELS. If such a |
f84b4be9 JM |
2063 | TEMPLATE_PARM_INDEX already exists, it is returned; otherwise, a |
2064 | new one is created. */ | |
2065 | ||
2066 | static tree | |
93cdc044 | 2067 | reduce_template_parm_level (index, type, levels) |
f84b4be9 JM |
2068 | tree index; |
2069 | tree type; | |
93cdc044 | 2070 | int levels; |
f84b4be9 JM |
2071 | { |
2072 | if (TEMPLATE_PARM_DESCENDANTS (index) == NULL_TREE | |
2073 | || (TEMPLATE_PARM_LEVEL (TEMPLATE_PARM_DESCENDANTS (index)) | |
93cdc044 | 2074 | != TEMPLATE_PARM_LEVEL (index) - levels)) |
f84b4be9 | 2075 | { |
3e4a3562 NS |
2076 | tree orig_decl = TEMPLATE_PARM_DECL (index); |
2077 | tree decl, t; | |
2078 | ||
2079 | decl = build_decl (TREE_CODE (orig_decl), DECL_NAME (orig_decl), type); | |
2080 | TREE_CONSTANT (decl) = TREE_CONSTANT (orig_decl); | |
2081 | TREE_READONLY (decl) = TREE_READONLY (orig_decl); | |
2082 | DECL_ARTIFICIAL (decl) = 1; | |
2083 | SET_DECL_TEMPLATE_PARM_P (decl); | |
2084 | ||
2085 | t = build_template_parm_index (TEMPLATE_PARM_IDX (index), | |
93cdc044 | 2086 | TEMPLATE_PARM_LEVEL (index) - levels, |
f84b4be9 JM |
2087 | TEMPLATE_PARM_ORIG_LEVEL (index), |
2088 | decl, type); | |
2089 | TEMPLATE_PARM_DESCENDANTS (index) = t; | |
cae40af6 JM |
2090 | |
2091 | /* Template template parameters need this. */ | |
2092 | DECL_TEMPLATE_PARMS (decl) | |
2093 | = DECL_TEMPLATE_PARMS (TEMPLATE_PARM_DECL (index)); | |
f84b4be9 JM |
2094 | } |
2095 | ||
2096 | return TEMPLATE_PARM_DESCENDANTS (index); | |
2097 | } | |
2098 | ||
8d08fdba | 2099 | /* Process information from new template parameter NEXT and append it to the |
5566b478 | 2100 | LIST being built. */ |
e92cc029 | 2101 | |
8d08fdba MS |
2102 | tree |
2103 | process_template_parm (list, next) | |
2104 | tree list, next; | |
2105 | { | |
2106 | tree parm; | |
2107 | tree decl = 0; | |
a292b002 | 2108 | tree defval; |
5566b478 | 2109 | int is_type, idx; |
f84b4be9 | 2110 | |
8d08fdba MS |
2111 | parm = next; |
2112 | my_friendly_assert (TREE_CODE (parm) == TREE_LIST, 259); | |
a292b002 MS |
2113 | defval = TREE_PURPOSE (parm); |
2114 | parm = TREE_VALUE (parm); | |
2115 | is_type = TREE_PURPOSE (parm) == class_type_node; | |
5566b478 MS |
2116 | |
2117 | if (list) | |
2118 | { | |
2119 | tree p = TREE_VALUE (tree_last (list)); | |
2120 | ||
1899c3a4 | 2121 | if (TREE_CODE (p) == TYPE_DECL || TREE_CODE (p) == TEMPLATE_DECL) |
5566b478 MS |
2122 | idx = TEMPLATE_TYPE_IDX (TREE_TYPE (p)); |
2123 | else | |
f84b4be9 | 2124 | idx = TEMPLATE_PARM_IDX (DECL_INITIAL (p)); |
5566b478 MS |
2125 | ++idx; |
2126 | } | |
2127 | else | |
2128 | idx = 0; | |
2129 | ||
8d08fdba MS |
2130 | if (!is_type) |
2131 | { | |
a292b002 | 2132 | my_friendly_assert (TREE_CODE (TREE_PURPOSE (parm)) == TREE_LIST, 260); |
8d08fdba | 2133 | /* is a const-param */ |
a292b002 | 2134 | parm = grokdeclarator (TREE_VALUE (parm), TREE_PURPOSE (parm), |
91d231cb | 2135 | PARM, 0, NULL); |
833aa4c4 | 2136 | SET_DECL_TEMPLATE_PARM_P (parm); |
d490621d MM |
2137 | |
2138 | /* [temp.param] | |
2139 | ||
2140 | The top-level cv-qualifiers on the template-parameter are | |
2141 | ignored when determining its type. */ | |
2142 | TREE_TYPE (parm) = TYPE_MAIN_VARIANT (TREE_TYPE (parm)); | |
2143 | ||
8d08fdba | 2144 | /* A template parameter is not modifiable. */ |
3e4a3562 | 2145 | TREE_READONLY (parm) = TREE_CONSTANT (parm) = 1; |
11b810f1 | 2146 | if (invalid_nontype_parm_type_p (TREE_TYPE (parm), 1)) |
db3f4e4e | 2147 | TREE_TYPE (parm) = void_type_node; |
8d08fdba | 2148 | decl = build_decl (CONST_DECL, DECL_NAME (parm), TREE_TYPE (parm)); |
3e4a3562 | 2149 | TREE_CONSTANT (decl) = TREE_READONLY (decl) = 1; |
f84b4be9 JM |
2150 | DECL_INITIAL (parm) = DECL_INITIAL (decl) |
2151 | = build_template_parm_index (idx, processing_template_decl, | |
2152 | processing_template_decl, | |
2153 | decl, TREE_TYPE (parm)); | |
8d08fdba MS |
2154 | } |
2155 | else | |
2156 | { | |
73b0fce8 KL |
2157 | tree t; |
2158 | parm = TREE_VALUE (parm); | |
2159 | ||
2160 | if (parm && TREE_CODE (parm) == TEMPLATE_DECL) | |
2161 | { | |
33848bb0 | 2162 | t = make_aggr_type (TEMPLATE_TEMPLATE_PARM); |
73b0fce8 KL |
2163 | /* This is for distinguishing between real templates and template |
2164 | template parameters */ | |
2165 | TREE_TYPE (parm) = t; | |
2166 | TREE_TYPE (DECL_TEMPLATE_RESULT (parm)) = t; | |
2167 | decl = parm; | |
2168 | } | |
2169 | else | |
2170 | { | |
33848bb0 | 2171 | t = make_aggr_type (TEMPLATE_TYPE_PARM); |
73b0fce8 KL |
2172 | /* parm is either IDENTIFIER_NODE or NULL_TREE */ |
2173 | decl = build_decl (TYPE_DECL, parm, t); | |
2174 | } | |
2175 | ||
d2e5ee5c MS |
2176 | TYPE_NAME (t) = decl; |
2177 | TYPE_STUB_DECL (t) = decl; | |
a292b002 | 2178 | parm = decl; |
f84b4be9 JM |
2179 | TEMPLATE_TYPE_PARM_INDEX (t) |
2180 | = build_template_parm_index (idx, processing_template_decl, | |
2181 | processing_template_decl, | |
2182 | decl, TREE_TYPE (parm)); | |
8d08fdba | 2183 | } |
c727aa5e | 2184 | DECL_ARTIFICIAL (decl) = 1; |
cd9f6678 | 2185 | SET_DECL_TEMPLATE_PARM_P (decl); |
8d08fdba | 2186 | pushdecl (decl); |
a292b002 | 2187 | parm = build_tree_list (defval, parm); |
8d08fdba MS |
2188 | return chainon (list, parm); |
2189 | } | |
2190 | ||
2191 | /* The end of a template parameter list has been reached. Process the | |
2192 | tree list into a parameter vector, converting each parameter into a more | |
2193 | useful form. Type parameters are saved as IDENTIFIER_NODEs, and others | |
2194 | as PARM_DECLs. */ | |
2195 | ||
2196 | tree | |
2197 | end_template_parm_list (parms) | |
2198 | tree parms; | |
2199 | { | |
5566b478 | 2200 | int nparms; |
9471d3e2 | 2201 | tree parm, next; |
5566b478 MS |
2202 | tree saved_parmlist = make_tree_vec (list_length (parms)); |
2203 | ||
5566b478 | 2204 | current_template_parms |
4890c2f4 | 2205 | = tree_cons (size_int (processing_template_decl), |
5566b478 | 2206 | saved_parmlist, current_template_parms); |
8d08fdba | 2207 | |
9471d3e2 NS |
2208 | for (parm = parms, nparms = 0; parm; parm = next, nparms++) |
2209 | { | |
2210 | next = TREE_CHAIN (parm); | |
2211 | TREE_VEC_ELT (saved_parmlist, nparms) = parm; | |
2212 | TREE_CHAIN (parm) = NULL_TREE; | |
2213 | } | |
a292b002 | 2214 | |
67ffc812 MM |
2215 | --processing_template_parmlist; |
2216 | ||
8d08fdba MS |
2217 | return saved_parmlist; |
2218 | } | |
2219 | ||
5566b478 MS |
2220 | /* end_template_decl is called after a template declaration is seen. */ |
2221 | ||
8d08fdba | 2222 | void |
5566b478 | 2223 | end_template_decl () |
8d08fdba | 2224 | { |
386b8a85 JM |
2225 | reset_specialization (); |
2226 | ||
5156628f | 2227 | if (! processing_template_decl) |
73aad9b9 JM |
2228 | return; |
2229 | ||
5566b478 | 2230 | /* This matches the pushlevel in begin_template_parm_list. */ |
74b846e0 | 2231 | finish_scope (); |
8d08fdba | 2232 | |
5566b478 MS |
2233 | --processing_template_decl; |
2234 | current_template_parms = TREE_CHAIN (current_template_parms); | |
5566b478 | 2235 | } |
8d08fdba | 2236 | |
36a117a5 MM |
2237 | /* Given a template argument vector containing the template PARMS. |
2238 | The innermost PARMS are given first. */ | |
9a3b49ac MS |
2239 | |
2240 | tree | |
2241 | current_template_args () | |
5566b478 | 2242 | { |
36a117a5 | 2243 | tree header; |
b370501f | 2244 | tree args = NULL_TREE; |
36a117a5 | 2245 | int length = TMPL_PARMS_DEPTH (current_template_parms); |
98c1c668 JM |
2246 | int l = length; |
2247 | ||
36a117a5 MM |
2248 | /* If there is only one level of template parameters, we do not |
2249 | create a TREE_VEC of TREE_VECs. Instead, we return a single | |
2250 | TREE_VEC containing the arguments. */ | |
2251 | if (length > 1) | |
2252 | args = make_tree_vec (length); | |
2253 | ||
2254 | for (header = current_template_parms; header; header = TREE_CHAIN (header)) | |
8d08fdba | 2255 | { |
5566b478 | 2256 | tree a = copy_node (TREE_VALUE (header)); |
36a117a5 MM |
2257 | int i; |
2258 | ||
5566b478 | 2259 | TREE_TYPE (a) = NULL_TREE; |
36a117a5 | 2260 | for (i = TREE_VEC_LENGTH (a) - 1; i >= 0; --i) |
5566b478 | 2261 | { |
98c1c668 JM |
2262 | tree t = TREE_VEC_ELT (a, i); |
2263 | ||
36a117a5 | 2264 | /* T will be a list if we are called from within a |
98c1c668 JM |
2265 | begin/end_template_parm_list pair, but a vector directly |
2266 | if within a begin/end_member_template_processing pair. */ | |
2267 | if (TREE_CODE (t) == TREE_LIST) | |
2268 | { | |
2269 | t = TREE_VALUE (t); | |
2270 | ||
73b0fce8 KL |
2271 | if (TREE_CODE (t) == TYPE_DECL |
2272 | || TREE_CODE (t) == TEMPLATE_DECL) | |
98c1c668 JM |
2273 | t = TREE_TYPE (t); |
2274 | else | |
2275 | t = DECL_INITIAL (t); | |
36a117a5 | 2276 | TREE_VEC_ELT (a, i) = t; |
98c1c668 | 2277 | } |
5566b478 | 2278 | } |
36a117a5 MM |
2279 | |
2280 | if (length > 1) | |
2281 | TREE_VEC_ELT (args, --l) = a; | |
2282 | else | |
2283 | args = a; | |
8d08fdba MS |
2284 | } |
2285 | ||
9a3b49ac MS |
2286 | return args; |
2287 | } | |
75650646 | 2288 | |
e1467ff2 MM |
2289 | /* Return a TEMPLATE_DECL corresponding to DECL, using the indicated |
2290 | template PARMS. Used by push_template_decl below. */ | |
2291 | ||
75650646 MM |
2292 | static tree |
2293 | build_template_decl (decl, parms) | |
2294 | tree decl; | |
2295 | tree parms; | |
2296 | { | |
2297 | tree tmpl = build_lang_decl (TEMPLATE_DECL, DECL_NAME (decl), NULL_TREE); | |
2298 | DECL_TEMPLATE_PARMS (tmpl) = parms; | |
2299 | DECL_CONTEXT (tmpl) = DECL_CONTEXT (decl); | |
2300 | if (DECL_LANG_SPECIFIC (decl)) | |
2301 | { | |
8f032717 MM |
2302 | DECL_STATIC_FUNCTION_P (tmpl) = DECL_STATIC_FUNCTION_P (decl); |
2303 | DECL_CONSTRUCTOR_P (tmpl) = DECL_CONSTRUCTOR_P (decl); | |
c8460010 | 2304 | DECL_DESTRUCTOR_P (tmpl) = DECL_DESTRUCTOR_P (decl); |
11f98788 | 2305 | DECL_NONCONVERTING_P (tmpl) = DECL_NONCONVERTING_P (decl); |
1f6e1acc AS |
2306 | DECL_ASSIGNMENT_OPERATOR_P (tmpl) = DECL_ASSIGNMENT_OPERATOR_P (decl); |
2307 | if (DECL_OVERLOADED_OPERATOR_P (decl)) | |
2308 | SET_OVERLOADED_OPERATOR_CODE (tmpl, | |
2309 | DECL_OVERLOADED_OPERATOR_P (decl)); | |
75650646 MM |
2310 | } |
2311 | ||
2312 | return tmpl; | |
2313 | } | |
2314 | ||
050367a3 MM |
2315 | struct template_parm_data |
2316 | { | |
6c30752f MM |
2317 | /* The level of the template parameters we are currently |
2318 | processing. */ | |
050367a3 | 2319 | int level; |
6c30752f MM |
2320 | |
2321 | /* The index of the specialization argument we are currently | |
2322 | processing. */ | |
2323 | int current_arg; | |
2324 | ||
2325 | /* An array whose size is the number of template parameters. The | |
838dfd8a | 2326 | elements are nonzero if the parameter has been used in any one |
6c30752f | 2327 | of the arguments processed so far. */ |
050367a3 | 2328 | int* parms; |
6c30752f MM |
2329 | |
2330 | /* An array whose size is the number of template arguments. The | |
838dfd8a | 2331 | elements are nonzero if the argument makes use of template |
6c30752f MM |
2332 | parameters of this level. */ |
2333 | int* arg_uses_template_parms; | |
050367a3 MM |
2334 | }; |
2335 | ||
2336 | /* Subroutine of push_template_decl used to see if each template | |
2337 | parameter in a partial specialization is used in the explicit | |
2338 | argument list. If T is of the LEVEL given in DATA (which is | |
2339 | treated as a template_parm_data*), then DATA->PARMS is marked | |
2340 | appropriately. */ | |
2341 | ||
2342 | static int | |
2343 | mark_template_parm (t, data) | |
2344 | tree t; | |
2345 | void* data; | |
2346 | { | |
2347 | int level; | |
2348 | int idx; | |
2349 | struct template_parm_data* tpd = (struct template_parm_data*) data; | |
2350 | ||
2351 | if (TREE_CODE (t) == TEMPLATE_PARM_INDEX) | |
2352 | { | |
2353 | level = TEMPLATE_PARM_LEVEL (t); | |
2354 | idx = TEMPLATE_PARM_IDX (t); | |
2355 | } | |
2356 | else | |
2357 | { | |
2358 | level = TEMPLATE_TYPE_LEVEL (t); | |
2359 | idx = TEMPLATE_TYPE_IDX (t); | |
2360 | } | |
2361 | ||
2362 | if (level == tpd->level) | |
6c30752f MM |
2363 | { |
2364 | tpd->parms[idx] = 1; | |
2365 | tpd->arg_uses_template_parms[tpd->current_arg] = 1; | |
2366 | } | |
050367a3 MM |
2367 | |
2368 | /* Return zero so that for_each_template_parm will continue the | |
2369 | traversal of the tree; we want to mark *every* template parm. */ | |
2370 | return 0; | |
2371 | } | |
2372 | ||
6c30752f MM |
2373 | /* Process the partial specialization DECL. */ |
2374 | ||
e9659ab0 | 2375 | static tree |
6c30752f MM |
2376 | process_partial_specialization (decl) |
2377 | tree decl; | |
2378 | { | |
2379 | tree type = TREE_TYPE (decl); | |
2380 | tree maintmpl = CLASSTYPE_TI_TEMPLATE (type); | |
2381 | tree specargs = CLASSTYPE_TI_ARGS (type); | |
f9a7ae04 | 2382 | tree inner_args = INNERMOST_TEMPLATE_ARGS (specargs); |
6c30752f MM |
2383 | tree inner_parms = INNERMOST_TEMPLATE_PARMS (current_template_parms); |
2384 | tree main_inner_parms = DECL_INNERMOST_TEMPLATE_PARMS (maintmpl); | |
2385 | int nargs = TREE_VEC_LENGTH (inner_args); | |
2386 | int ntparms = TREE_VEC_LENGTH (inner_parms); | |
2387 | int i; | |
2388 | int did_error_intro = 0; | |
6c30752f MM |
2389 | struct template_parm_data tpd; |
2390 | struct template_parm_data tpd2; | |
2391 | ||
6c30752f MM |
2392 | /* We check that each of the template parameters given in the |
2393 | partial specialization is used in the argument list to the | |
2394 | specialization. For example: | |
2395 | ||
2396 | template <class T> struct S; | |
2397 | template <class T> struct S<T*>; | |
2398 | ||
2399 | The second declaration is OK because `T*' uses the template | |
2400 | parameter T, whereas | |
2401 | ||
2402 | template <class T> struct S<int>; | |
2403 | ||
2404 | is no good. Even trickier is: | |
2405 | ||
2406 | template <class T> | |
2407 | struct S1 | |
2408 | { | |
2409 | template <class U> | |
2410 | struct S2; | |
2411 | template <class U> | |
2412 | struct S2<T>; | |
2413 | }; | |
2414 | ||
0e339752 | 2415 | The S2<T> declaration is actually invalid; it is a |
6c30752f MM |
2416 | full-specialization. Of course, |
2417 | ||
2418 | template <class U> | |
2419 | struct S2<T (*)(U)>; | |
2420 | ||
2421 | or some such would have been OK. */ | |
2422 | tpd.level = TMPL_PARMS_DEPTH (current_template_parms); | |
2423 | tpd.parms = alloca (sizeof (int) * ntparms); | |
961192e1 | 2424 | memset ((PTR) tpd.parms, 0, sizeof (int) * ntparms); |
6c30752f MM |
2425 | |
2426 | tpd.arg_uses_template_parms = alloca (sizeof (int) * nargs); | |
961192e1 | 2427 | memset ((PTR) tpd.arg_uses_template_parms, 0, sizeof (int) * nargs); |
6c30752f MM |
2428 | for (i = 0; i < nargs; ++i) |
2429 | { | |
2430 | tpd.current_arg = i; | |
2431 | for_each_template_parm (TREE_VEC_ELT (inner_args, i), | |
2432 | &mark_template_parm, | |
4f2c9d7e MM |
2433 | &tpd, |
2434 | NULL); | |
6c30752f MM |
2435 | } |
2436 | for (i = 0; i < ntparms; ++i) | |
2437 | if (tpd.parms[i] == 0) | |
2438 | { | |
2439 | /* One of the template parms was not used in the | |
f9a7ae04 | 2440 | specialization. */ |
6c30752f MM |
2441 | if (!did_error_intro) |
2442 | { | |
33bd39a2 | 2443 | error ("template parameters not used in partial specialization:"); |
6c30752f MM |
2444 | did_error_intro = 1; |
2445 | } | |
2446 | ||
33bd39a2 | 2447 | error (" `%D'", |
6c30752f MM |
2448 | TREE_VALUE (TREE_VEC_ELT (inner_parms, i))); |
2449 | } | |
2450 | ||
2451 | /* [temp.class.spec] | |
2452 | ||
2453 | The argument list of the specialization shall not be identical to | |
2454 | the implicit argument list of the primary template. */ | |
f9a7ae04 MM |
2455 | if (comp_template_args |
2456 | (inner_args, | |
2457 | INNERMOST_TEMPLATE_ARGS (CLASSTYPE_TI_ARGS (TREE_TYPE | |
2458 | (maintmpl))))) | |
33bd39a2 | 2459 | error ("partial specialization `%T' does not specialize any template arguments", type); |
6c30752f MM |
2460 | |
2461 | /* [temp.class.spec] | |
2462 | ||
2463 | A partially specialized non-type argument expression shall not | |
2464 | involve template parameters of the partial specialization except | |
2465 | when the argument expression is a simple identifier. | |
2466 | ||
2467 | The type of a template parameter corresponding to a specialized | |
2468 | non-type argument shall not be dependent on a parameter of the | |
2469 | specialization. */ | |
2470 | my_friendly_assert (nargs == DECL_NTPARMS (maintmpl), 0); | |
2471 | tpd2.parms = 0; | |
2472 | for (i = 0; i < nargs; ++i) | |
2473 | { | |
2474 | tree arg = TREE_VEC_ELT (inner_args, i); | |
2475 | if (/* These first two lines are the `non-type' bit. */ | |
2f939d94 | 2476 | !TYPE_P (arg) |
6c30752f MM |
2477 | && TREE_CODE (arg) != TEMPLATE_DECL |
2478 | /* This next line is the `argument expression is not just a | |
2479 | simple identifier' condition and also the `specialized | |
2480 | non-type argument' bit. */ | |
2481 | && TREE_CODE (arg) != TEMPLATE_PARM_INDEX) | |
2482 | { | |
2483 | if (tpd.arg_uses_template_parms[i]) | |
33bd39a2 | 2484 | error ("template argument `%E' involves template parameter(s)", arg); |
6c30752f MM |
2485 | else |
2486 | { | |
2487 | /* Look at the corresponding template parameter, | |
2488 | marking which template parameters its type depends | |
2489 | upon. */ | |
2490 | tree type = | |
2491 | TREE_TYPE (TREE_VALUE (TREE_VEC_ELT (main_inner_parms, | |
2492 | i))); | |
2493 | ||
2494 | if (!tpd2.parms) | |
2495 | { | |
2496 | /* We haven't yet initialized TPD2. Do so now. */ | |
2497 | tpd2.arg_uses_template_parms | |
2498 | = (int*) alloca (sizeof (int) * nargs); | |
104bf76a | 2499 | /* The number of parameters here is the number in the |
76a83782 RH |
2500 | main template, which, as checked in the assertion |
2501 | above, is NARGS. */ | |
6c30752f MM |
2502 | tpd2.parms = (int*) alloca (sizeof (int) * nargs); |
2503 | tpd2.level = | |
2504 | TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (maintmpl)); | |
2505 | } | |
2506 | ||
104bf76a | 2507 | /* Mark the template parameters. But this time, we're |
6c30752f MM |
2508 | looking for the template parameters of the main |
2509 | template, not in the specialization. */ | |
2510 | tpd2.current_arg = i; | |
2511 | tpd2.arg_uses_template_parms[i] = 0; | |
961192e1 | 2512 | memset ((PTR) tpd2.parms, 0, sizeof (int) * nargs); |
6c30752f MM |
2513 | for_each_template_parm (type, |
2514 | &mark_template_parm, | |
4f2c9d7e MM |
2515 | &tpd2, |
2516 | NULL); | |
6c30752f MM |
2517 | |
2518 | if (tpd2.arg_uses_template_parms [i]) | |
2519 | { | |
2520 | /* The type depended on some template parameters. | |
2521 | If they are fully specialized in the | |
2522 | specialization, that's OK. */ | |
2523 | int j; | |
2524 | for (j = 0; j < nargs; ++j) | |
2525 | if (tpd2.parms[j] != 0 | |
2526 | && tpd.arg_uses_template_parms [j]) | |
2527 | { | |
33bd39a2 | 2528 | error ("type `%T' of template argument `%E' depends on template parameter(s)", |
6c30752f MM |
2529 | type, |
2530 | arg); | |
2531 | break; | |
2532 | } | |
2533 | } | |
2534 | } | |
2535 | } | |
2536 | } | |
2537 | ||
2538 | if (retrieve_specialization (maintmpl, specargs)) | |
2539 | /* We've already got this specialization. */ | |
2540 | return decl; | |
2541 | ||
d8b64f80 | 2542 | DECL_TEMPLATE_SPECIALIZATIONS (maintmpl) |
e1b3e07d MM |
2543 | = tree_cons (inner_args, inner_parms, |
2544 | DECL_TEMPLATE_SPECIALIZATIONS (maintmpl)); | |
6c30752f MM |
2545 | TREE_TYPE (DECL_TEMPLATE_SPECIALIZATIONS (maintmpl)) = type; |
2546 | return decl; | |
2547 | } | |
2548 | ||
6ba89f8e MM |
2549 | /* Check that a template declaration's use of default arguments is not |
2550 | invalid. Here, PARMS are the template parameters. IS_PRIMARY is | |
838dfd8a KH |
2551 | nonzero if DECL is the thing declared by a primary template. |
2552 | IS_PARTIAL is nonzero if DECL is a partial specialization. */ | |
6ba89f8e MM |
2553 | |
2554 | static void | |
2555 | check_default_tmpl_args (decl, parms, is_primary, is_partial) | |
2556 | tree decl; | |
2557 | tree parms; | |
2558 | int is_primary; | |
2559 | int is_partial; | |
2560 | { | |
d8e178a0 | 2561 | const char *msg; |
66191c20 MM |
2562 | int last_level_to_check; |
2563 | tree parm_level; | |
6ba89f8e MM |
2564 | |
2565 | /* [temp.param] | |
2566 | ||
2567 | A default template-argument shall not be specified in a | |
2568 | function template declaration or a function template definition, nor | |
2569 | in the template-parameter-list of the definition of a member of a | |
2570 | class template. */ | |
2571 | ||
4f1c5b7d | 2572 | if (TREE_CODE (CP_DECL_CONTEXT (decl)) == FUNCTION_DECL) |
e0942dcd MM |
2573 | /* You can't have a function template declaration in a local |
2574 | scope, nor you can you define a member of a class template in a | |
2575 | local scope. */ | |
2576 | return; | |
2577 | ||
6ba89f8e MM |
2578 | if (current_class_type |
2579 | && !TYPE_BEING_DEFINED (current_class_type) | |
3d7de1fa | 2580 | && DECL_LANG_SPECIFIC (decl) |
5937a6f9 MM |
2581 | /* If this is either a friend defined in the scope of the class |
2582 | or a member function. */ | |
4f1c5b7d MM |
2583 | && ((DECL_CONTEXT (decl) |
2584 | && same_type_p (DECL_CONTEXT (decl), current_class_type)) | |
2585 | || (DECL_FRIEND_CONTEXT (decl) | |
2586 | && same_type_p (DECL_FRIEND_CONTEXT (decl), | |
2587 | current_class_type))) | |
5937a6f9 MM |
2588 | /* And, if it was a member function, it really was defined in |
2589 | the scope of the class. */ | |
3febd123 | 2590 | && (!DECL_FUNCTION_MEMBER_P (decl) || DECL_INITIALIZED_IN_CLASS_P (decl))) |
6ba89f8e | 2591 | /* We already checked these parameters when the template was |
5937a6f9 MM |
2592 | declared, so there's no need to do it again now. This function |
2593 | was defined in class scope, but we're processing it's body now | |
2594 | that the class is complete. */ | |
6ba89f8e MM |
2595 | return; |
2596 | ||
66191c20 MM |
2597 | /* [temp.param] |
2598 | ||
2599 | If a template-parameter has a default template-argument, all | |
2600 | subsequent template-parameters shall have a default | |
2601 | template-argument supplied. */ | |
2602 | for (parm_level = parms; parm_level; parm_level = TREE_CHAIN (parm_level)) | |
2603 | { | |
2604 | tree inner_parms = TREE_VALUE (parm_level); | |
2605 | int ntparms = TREE_VEC_LENGTH (inner_parms); | |
2606 | int seen_def_arg_p = 0; | |
2607 | int i; | |
2608 | ||
2609 | for (i = 0; i < ntparms; ++i) | |
2610 | { | |
2611 | tree parm = TREE_VEC_ELT (inner_parms, i); | |
2612 | if (TREE_PURPOSE (parm)) | |
2613 | seen_def_arg_p = 1; | |
2614 | else if (seen_def_arg_p) | |
2615 | { | |
33bd39a2 | 2616 | error ("no default argument for `%D'", TREE_VALUE (parm)); |
66191c20 MM |
2617 | /* For better subsequent error-recovery, we indicate that |
2618 | there should have been a default argument. */ | |
2619 | TREE_PURPOSE (parm) = error_mark_node; | |
2620 | } | |
2621 | } | |
2622 | } | |
2623 | ||
6ba89f8e MM |
2624 | if (TREE_CODE (decl) != TYPE_DECL || is_partial || !is_primary) |
2625 | /* For an ordinary class template, default template arguments are | |
2626 | allowed at the innermost level, e.g.: | |
2627 | template <class T = int> | |
2628 | struct S {}; | |
2629 | but, in a partial specialization, they're not allowed even | |
2630 | there, as we have in [temp.class.spec]: | |
2631 | ||
2632 | The template parameter list of a specialization shall not | |
2633 | contain default template argument values. | |
2634 | ||
2635 | So, for a partial specialization, or for a function template, | |
2636 | we look at all of them. */ | |
2637 | ; | |
2638 | else | |
2639 | /* But, for a primary class template that is not a partial | |
2640 | specialization we look at all template parameters except the | |
2641 | innermost ones. */ | |
2642 | parms = TREE_CHAIN (parms); | |
2643 | ||
2644 | /* Figure out what error message to issue. */ | |
2645 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
8653a2c3 | 2646 | msg = "default template arguments may not be used in function templates"; |
6ba89f8e | 2647 | else if (is_partial) |
8653a2c3 | 2648 | msg = "default template arguments may not be used in partial specializations"; |
6ba89f8e MM |
2649 | else |
2650 | msg = "default argument for template parameter for class enclosing `%D'"; | |
2651 | ||
2652 | if (current_class_type && TYPE_BEING_DEFINED (current_class_type)) | |
2653 | /* If we're inside a class definition, there's no need to | |
104bf76a | 2654 | examine the parameters to the class itself. On the one |
6ba89f8e | 2655 | hand, they will be checked when the class is defined, and, |
0e339752 | 2656 | on the other, default arguments are valid in things like: |
6ba89f8e MM |
2657 | template <class T = double> |
2658 | struct S { template <class U> void f(U); }; | |
2659 | Here the default argument for `S' has no bearing on the | |
2660 | declaration of `f'. */ | |
2661 | last_level_to_check = template_class_depth (current_class_type) + 1; | |
2662 | else | |
2663 | /* Check everything. */ | |
2664 | last_level_to_check = 0; | |
2665 | ||
66191c20 MM |
2666 | for (parm_level = parms; |
2667 | parm_level && TMPL_PARMS_DEPTH (parm_level) >= last_level_to_check; | |
2668 | parm_level = TREE_CHAIN (parm_level)) | |
6ba89f8e | 2669 | { |
66191c20 MM |
2670 | tree inner_parms = TREE_VALUE (parm_level); |
2671 | int i; | |
2672 | int ntparms; | |
6ba89f8e MM |
2673 | |
2674 | ntparms = TREE_VEC_LENGTH (inner_parms); | |
2675 | for (i = 0; i < ntparms; ++i) | |
2676 | if (TREE_PURPOSE (TREE_VEC_ELT (inner_parms, i))) | |
2677 | { | |
2678 | if (msg) | |
2679 | { | |
33bd39a2 | 2680 | error (msg, decl); |
6ba89f8e MM |
2681 | msg = 0; |
2682 | } | |
2683 | ||
2684 | /* Clear out the default argument so that we are not | |
2685 | confused later. */ | |
2686 | TREE_PURPOSE (TREE_VEC_ELT (inner_parms, i)) = NULL_TREE; | |
2687 | } | |
2688 | ||
2689 | /* At this point, if we're still interested in issuing messages, | |
2690 | they must apply to classes surrounding the object declared. */ | |
2691 | if (msg) | |
2692 | msg = "default argument for template parameter for class enclosing `%D'"; | |
2693 | } | |
2694 | } | |
2695 | ||
5dd236e2 NS |
2696 | /* Worker for push_template_decl_real, called via |
2697 | for_each_template_parm. DATA is really an int, indicating the | |
2698 | level of the parameters we are interested in. If T is a template | |
838dfd8a | 2699 | parameter of that level, return nonzero. */ |
5dd236e2 NS |
2700 | |
2701 | static int | |
2702 | template_parm_this_level_p (t, data) | |
2703 | tree t; | |
2704 | void *data; | |
2705 | { | |
6e04241f | 2706 | int this_level = *(int *)data; |
5dd236e2 NS |
2707 | int level; |
2708 | ||
2709 | if (TREE_CODE (t) == TEMPLATE_PARM_INDEX) | |
2710 | level = TEMPLATE_PARM_LEVEL (t); | |
2711 | else | |
2712 | level = TEMPLATE_TYPE_LEVEL (t); | |
2713 | return level == this_level; | |
2714 | } | |
2715 | ||
3ac3d9ea | 2716 | /* Creates a TEMPLATE_DECL for the indicated DECL using the template |
f84b4be9 JM |
2717 | parameters given by current_template_args, or reuses a |
2718 | previously existing one, if appropriate. Returns the DECL, or an | |
6757edfe MM |
2719 | equivalent one, if it is replaced via a call to duplicate_decls. |
2720 | ||
838dfd8a | 2721 | If IS_FRIEND is nonzero, DECL is a friend declaration. */ |
3ac3d9ea MM |
2722 | |
2723 | tree | |
6757edfe | 2724 | push_template_decl_real (decl, is_friend) |
9a3b49ac | 2725 | tree decl; |
6757edfe | 2726 | int is_friend; |
9a3b49ac MS |
2727 | { |
2728 | tree tmpl; | |
f84b4be9 | 2729 | tree args; |
9a3b49ac | 2730 | tree info; |
f84b4be9 JM |
2731 | tree ctx; |
2732 | int primary; | |
6ba89f8e | 2733 | int is_partial; |
cfe507be | 2734 | int new_template_p = 0; |
6ba89f8e MM |
2735 | |
2736 | /* See if this is a partial specialization. */ | |
9188c363 | 2737 | is_partial = (DECL_IMPLICIT_TYPEDEF_P (decl) |
6ba89f8e | 2738 | && TREE_CODE (TREE_TYPE (decl)) != ENUMERAL_TYPE |
370af2d5 | 2739 | && CLASSTYPE_TEMPLATE_SPECIALIZATION (TREE_TYPE (decl))); |
6757edfe MM |
2740 | |
2741 | is_friend |= (TREE_CODE (decl) == FUNCTION_DECL && DECL_FRIEND_P (decl)); | |
f84b4be9 JM |
2742 | |
2743 | if (is_friend) | |
2744 | /* For a friend, we want the context of the friend function, not | |
2745 | the type of which it is a friend. */ | |
2746 | ctx = DECL_CONTEXT (decl); | |
4f1c5b7d MM |
2747 | else if (CP_DECL_CONTEXT (decl) |
2748 | && TREE_CODE (CP_DECL_CONTEXT (decl)) != NAMESPACE_DECL) | |
f84b4be9 JM |
2749 | /* In the case of a virtual function, we want the class in which |
2750 | it is defined. */ | |
4f1c5b7d | 2751 | ctx = CP_DECL_CONTEXT (decl); |
f84b4be9 | 2752 | else |
dc957d14 | 2753 | /* Otherwise, if we're currently defining some class, the DECL |
f84b4be9 | 2754 | is assumed to be a member of the class. */ |
9188c363 | 2755 | ctx = current_scope (); |
f84b4be9 | 2756 | |
2c73f9f5 ML |
2757 | if (ctx && TREE_CODE (ctx) == NAMESPACE_DECL) |
2758 | ctx = NULL_TREE; | |
2759 | ||
2760 | if (!DECL_CONTEXT (decl)) | |
cb0dbb9a | 2761 | DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace); |
2c73f9f5 | 2762 | |
6ba89f8e | 2763 | /* See if this is a primary template. */ |
74b846e0 | 2764 | primary = template_parm_scope_p (); |
9a3b49ac | 2765 | |
83566abf JM |
2766 | if (primary) |
2767 | { | |
2768 | if (current_lang_name == lang_name_c) | |
33bd39a2 | 2769 | error ("template with C linkage"); |
4ce3d537 MM |
2770 | else if (TREE_CODE (decl) == TYPE_DECL |
2771 | && ANON_AGGRNAME_P (DECL_NAME (decl))) | |
33bd39a2 | 2772 | error ("template class without a name"); |
2aaf816d JM |
2773 | else if ((DECL_IMPLICIT_TYPEDEF_P (decl) |
2774 | && CLASS_TYPE_P (TREE_TYPE (decl))) | |
2775 | || (TREE_CODE (decl) == VAR_DECL && ctx && CLASS_TYPE_P (ctx)) | |
2776 | || TREE_CODE (decl) == FUNCTION_DECL) | |
2777 | /* OK */; | |
2778 | else | |
33bd39a2 | 2779 | error ("template declaration of `%#D'", decl); |
83566abf JM |
2780 | } |
2781 | ||
6ba89f8e MM |
2782 | /* Check to see that the rules regarding the use of default |
2783 | arguments are not being violated. */ | |
2784 | check_default_tmpl_args (decl, current_template_parms, | |
2785 | primary, is_partial); | |
73aad9b9 | 2786 | |
6ba89f8e MM |
2787 | if (is_partial) |
2788 | return process_partial_specialization (decl); | |
d32789d8 | 2789 | |
9a3b49ac MS |
2790 | args = current_template_args (); |
2791 | ||
f84b4be9 JM |
2792 | if (!ctx |
2793 | || TREE_CODE (ctx) == FUNCTION_DECL | |
a723baf1 | 2794 | || (CLASS_TYPE_P (ctx) && TYPE_BEING_DEFINED (ctx)) |
f84b4be9 | 2795 | || (is_friend && !DECL_TEMPLATE_INFO (decl))) |
8d08fdba | 2796 | { |
75650646 | 2797 | if (DECL_LANG_SPECIFIC (decl) |
f84b4be9 JM |
2798 | && DECL_TEMPLATE_INFO (decl) |
2799 | && DECL_TI_TEMPLATE (decl)) | |
2800 | tmpl = DECL_TI_TEMPLATE (decl); | |
1c10870d AS |
2801 | /* If DECL is a TYPE_DECL for a class-template, then there won't |
2802 | be DECL_LANG_SPECIFIC. The information equivalent to | |
2803 | DECL_TEMPLATE_INFO is found in TYPE_TEMPLATE_INFO instead. */ | |
2804 | else if (DECL_IMPLICIT_TYPEDEF_P (decl) | |
2805 | && TYPE_TEMPLATE_INFO (TREE_TYPE (decl)) | |
2806 | && TYPE_TI_TEMPLATE (TREE_TYPE (decl))) | |
2807 | { | |
2808 | /* Since a template declaration already existed for this | |
2809 | class-type, we must be redeclaring it here. Make sure | |
0e339752 | 2810 | that the redeclaration is valid. */ |
1c10870d AS |
2811 | redeclare_class_template (TREE_TYPE (decl), |
2812 | current_template_parms); | |
2813 | /* We don't need to create a new TEMPLATE_DECL; just use the | |
2814 | one we already had. */ | |
2815 | tmpl = TYPE_TI_TEMPLATE (TREE_TYPE (decl)); | |
2816 | } | |
f84b4be9 | 2817 | else |
786b5245 | 2818 | { |
f84b4be9 | 2819 | tmpl = build_template_decl (decl, current_template_parms); |
cfe507be MM |
2820 | new_template_p = 1; |
2821 | ||
f84b4be9 JM |
2822 | if (DECL_LANG_SPECIFIC (decl) |
2823 | && DECL_TEMPLATE_SPECIALIZATION (decl)) | |
2824 | { | |
2825 | /* A specialization of a member template of a template | |
c6002625 | 2826 | class. */ |
f84b4be9 JM |
2827 | SET_DECL_TEMPLATE_SPECIALIZATION (tmpl); |
2828 | DECL_TEMPLATE_INFO (tmpl) = DECL_TEMPLATE_INFO (decl); | |
2829 | DECL_TEMPLATE_INFO (decl) = NULL_TREE; | |
2830 | } | |
786b5245 | 2831 | } |
8d08fdba MS |
2832 | } |
2833 | else | |
2834 | { | |
e1a5ccf7 | 2835 | tree a, t, current, parms; |
ba4f4e5d | 2836 | int i; |
6633d636 | 2837 | |
6b9ab5cc MM |
2838 | if (TREE_CODE (decl) == TYPE_DECL) |
2839 | { | |
ed44da02 MM |
2840 | if ((IS_AGGR_TYPE_CODE (TREE_CODE (TREE_TYPE (decl))) |
2841 | || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE) | |
2842 | && TYPE_TEMPLATE_INFO (TREE_TYPE (decl)) | |
2843 | && TYPE_TI_TEMPLATE (TREE_TYPE (decl))) | |
2844 | tmpl = TYPE_TI_TEMPLATE (TREE_TYPE (decl)); | |
6b9ab5cc MM |
2845 | else |
2846 | { | |
33bd39a2 | 2847 | error ("`%D' does not declare a template type", decl); |
6b9ab5cc MM |
2848 | return decl; |
2849 | } | |
2850 | } | |
f3368a90 | 2851 | else if (!DECL_LANG_SPECIFIC (decl) || !DECL_TEMPLATE_INFO (decl)) |
c91a56d2 | 2852 | { |
33bd39a2 | 2853 | error ("template definition of non-template `%#D'", decl); |
3ac3d9ea | 2854 | return decl; |
c91a56d2 | 2855 | } |
8d08fdba | 2856 | else |
5566b478 | 2857 | tmpl = DECL_TI_TEMPLATE (decl); |
98c1c668 | 2858 | |
e1a5ccf7 JM |
2859 | if (is_member_template (tmpl) |
2860 | && DECL_FUNCTION_TEMPLATE_P (tmpl) | |
2861 | && DECL_TEMPLATE_INFO (decl) && DECL_TI_ARGS (decl) | |
2862 | && DECL_TEMPLATE_SPECIALIZATION (decl)) | |
98c1c668 | 2863 | { |
e1a5ccf7 JM |
2864 | tree new_tmpl; |
2865 | ||
2866 | /* The declaration is a specialization of a member | |
2867 | template, declared outside the class. Therefore, the | |
2868 | innermost template arguments will be NULL, so we | |
2869 | replace them with the arguments determined by the | |
2870 | earlier call to check_explicit_specialization. */ | |
2871 | args = DECL_TI_ARGS (decl); | |
2872 | ||
2873 | new_tmpl | |
2874 | = build_template_decl (decl, current_template_parms); | |
2875 | DECL_TEMPLATE_RESULT (new_tmpl) = decl; | |
2876 | TREE_TYPE (new_tmpl) = TREE_TYPE (decl); | |
2877 | DECL_TI_TEMPLATE (decl) = new_tmpl; | |
2878 | SET_DECL_TEMPLATE_SPECIALIZATION (new_tmpl); | |
e1b3e07d MM |
2879 | DECL_TEMPLATE_INFO (new_tmpl) |
2880 | = tree_cons (tmpl, args, NULL_TREE); | |
e1a5ccf7 | 2881 | |
f9a7ae04 MM |
2882 | register_specialization (new_tmpl, |
2883 | most_general_template (tmpl), | |
2884 | args); | |
e1a5ccf7 | 2885 | return decl; |
98c1c668 | 2886 | } |
98c1c668 | 2887 | |
e1a5ccf7 | 2888 | /* Make sure the template headers we got make sense. */ |
6633d636 | 2889 | |
e1a5ccf7 JM |
2890 | parms = DECL_TEMPLATE_PARMS (tmpl); |
2891 | i = TMPL_PARMS_DEPTH (parms); | |
2892 | if (TMPL_ARGS_DEPTH (args) != i) | |
98c1c668 | 2893 | { |
33bd39a2 | 2894 | error ("expected %d levels of template parms for `%#D', got %d", |
e1a5ccf7 | 2895 | i, decl, TMPL_ARGS_DEPTH (args)); |
98c1c668 | 2896 | } |
e1a5ccf7 JM |
2897 | else |
2898 | for (current = decl; i > 0; --i, parms = TREE_CHAIN (parms)) | |
2899 | { | |
2900 | a = TMPL_ARGS_LEVEL (args, i); | |
2901 | t = INNERMOST_TEMPLATE_PARMS (parms); | |
2902 | ||
2903 | if (TREE_VEC_LENGTH (t) != TREE_VEC_LENGTH (a)) | |
2904 | { | |
2905 | if (current == decl) | |
33bd39a2 | 2906 | error ("got %d template parameters for `%#D'", |
e1a5ccf7 JM |
2907 | TREE_VEC_LENGTH (a), decl); |
2908 | else | |
33bd39a2 | 2909 | error ("got %d template parameters for `%#T'", |
e1a5ccf7 | 2910 | TREE_VEC_LENGTH (a), current); |
33bd39a2 | 2911 | error (" but %d required", TREE_VEC_LENGTH (t)); |
e1a5ccf7 | 2912 | } |
98c1c668 | 2913 | |
e1a5ccf7 JM |
2914 | /* Perhaps we should also check that the parms are used in the |
2915 | appropriate qualifying scopes in the declarator? */ | |
6633d636 | 2916 | |
e1a5ccf7 JM |
2917 | if (current == decl) |
2918 | current = ctx; | |
2919 | else | |
2920 | current = TYPE_CONTEXT (current); | |
2921 | } | |
5566b478 | 2922 | } |
8d08fdba | 2923 | |
5566b478 MS |
2924 | DECL_TEMPLATE_RESULT (tmpl) = decl; |
2925 | TREE_TYPE (tmpl) = TREE_TYPE (decl); | |
8d08fdba | 2926 | |
36a117a5 MM |
2927 | /* Push template declarations for global functions and types. Note |
2928 | that we do not try to push a global template friend declared in a | |
2929 | template class; such a thing may well depend on the template | |
39c01e4c | 2930 | parameters of the class. */ |
cfe507be | 2931 | if (new_template_p && !ctx |
36a117a5 | 2932 | && !(is_friend && template_class_depth (current_class_type) > 0)) |
2c73f9f5 | 2933 | tmpl = pushdecl_namespace_level (tmpl); |
8d08fdba | 2934 | |
5566b478 | 2935 | if (primary) |
5dd236e2 NS |
2936 | { |
2937 | DECL_PRIMARY_TEMPLATE (tmpl) = tmpl; | |
2938 | if (DECL_CONV_FN_P (tmpl)) | |
2939 | { | |
6e04241f GS |
2940 | int depth = TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (tmpl)); |
2941 | ||
5dd236e2 NS |
2942 | /* It is a conversion operator. See if the type converted to |
2943 | depends on innermost template operands. */ | |
2944 | ||
6e04241f GS |
2945 | if (for_each_template_parm (TREE_TYPE (TREE_TYPE (tmpl)), |
2946 | template_parm_this_level_p, | |
4f2c9d7e MM |
2947 | &depth, |
2948 | NULL)) | |
5dd236e2 NS |
2949 | DECL_TEMPLATE_CONV_FN_P (tmpl) = 1; |
2950 | } | |
2951 | } | |
5566b478 | 2952 | |
e1b3e07d | 2953 | info = tree_cons (tmpl, args, NULL_TREE); |
5566b478 | 2954 | |
9188c363 | 2955 | if (DECL_IMPLICIT_TYPEDEF_P (decl)) |
8d08fdba | 2956 | { |
ed44da02 MM |
2957 | SET_TYPE_TEMPLATE_INFO (TREE_TYPE (tmpl), info); |
2958 | if ((!ctx || TREE_CODE (ctx) != FUNCTION_DECL) | |
b60ecc04 MM |
2959 | && TREE_CODE (TREE_TYPE (decl)) != ENUMERAL_TYPE |
2960 | /* Don't change the name if we've already set it up. */ | |
2961 | && !IDENTIFIER_TEMPLATE (DECL_NAME (decl))) | |
75650646 | 2962 | DECL_NAME (decl) = classtype_mangled_name (TREE_TYPE (decl)); |
51c184be | 2963 | } |
2aaf816d | 2964 | else if (DECL_LANG_SPECIFIC (decl)) |
5566b478 | 2965 | DECL_TEMPLATE_INFO (decl) = info; |
3ac3d9ea MM |
2966 | |
2967 | return DECL_TEMPLATE_RESULT (tmpl); | |
8d08fdba MS |
2968 | } |
2969 | ||
6757edfe MM |
2970 | tree |
2971 | push_template_decl (decl) | |
2972 | tree decl; | |
2973 | { | |
2974 | return push_template_decl_real (decl, 0); | |
2975 | } | |
2976 | ||
2977 | /* Called when a class template TYPE is redeclared with the indicated | |
2978 | template PARMS, e.g.: | |
7fe6899f MM |
2979 | |
2980 | template <class T> struct S; | |
2981 | template <class T> struct S {}; */ | |
2982 | ||
2983 | void | |
6757edfe | 2984 | redeclare_class_template (type, parms) |
7fe6899f | 2985 | tree type; |
6757edfe | 2986 | tree parms; |
7fe6899f | 2987 | { |
3d7de1fa | 2988 | tree tmpl; |
6757edfe | 2989 | tree tmpl_parms; |
7fe6899f MM |
2990 | int i; |
2991 | ||
3d7de1fa MM |
2992 | if (!TYPE_TEMPLATE_INFO (type)) |
2993 | { | |
33bd39a2 | 2994 | error ("`%T' is not a template type", type); |
3d7de1fa MM |
2995 | return; |
2996 | } | |
2997 | ||
2998 | tmpl = TYPE_TI_TEMPLATE (type); | |
7fe6899f MM |
2999 | if (!PRIMARY_TEMPLATE_P (tmpl)) |
3000 | /* The type is nested in some template class. Nothing to worry | |
3001 | about here; there are no new template parameters for the nested | |
3002 | type. */ | |
3003 | return; | |
3004 | ||
6757edfe MM |
3005 | parms = INNERMOST_TEMPLATE_PARMS (parms); |
3006 | tmpl_parms = DECL_INNERMOST_TEMPLATE_PARMS (tmpl); | |
3007 | ||
7fe6899f MM |
3008 | if (TREE_VEC_LENGTH (parms) != TREE_VEC_LENGTH (tmpl_parms)) |
3009 | { | |
8251199e | 3010 | cp_error_at ("previous declaration `%D'", tmpl); |
33bd39a2 | 3011 | error ("used %d template parameter%s instead of %d", |
7fe6899f MM |
3012 | TREE_VEC_LENGTH (tmpl_parms), |
3013 | TREE_VEC_LENGTH (tmpl_parms) == 1 ? "" : "s", | |
3014 | TREE_VEC_LENGTH (parms)); | |
3015 | return; | |
3016 | } | |
3017 | ||
3018 | for (i = 0; i < TREE_VEC_LENGTH (tmpl_parms); ++i) | |
3019 | { | |
3020 | tree tmpl_parm = TREE_VALUE (TREE_VEC_ELT (tmpl_parms, i)); | |
3021 | tree parm = TREE_VALUE (TREE_VEC_ELT (parms, i)); | |
3022 | tree tmpl_default = TREE_PURPOSE (TREE_VEC_ELT (tmpl_parms, i)); | |
3023 | tree parm_default = TREE_PURPOSE (TREE_VEC_ELT (parms, i)); | |
3024 | ||
3025 | if (TREE_CODE (tmpl_parm) != TREE_CODE (parm)) | |
3026 | { | |
8251199e | 3027 | cp_error_at ("template parameter `%#D'", tmpl_parm); |
33bd39a2 | 3028 | error ("redeclared here as `%#D'", parm); |
7fe6899f MM |
3029 | return; |
3030 | } | |
3031 | ||
3032 | if (tmpl_default != NULL_TREE && parm_default != NULL_TREE) | |
3033 | { | |
3034 | /* We have in [temp.param]: | |
3035 | ||
3036 | A template-parameter may not be given default arguments | |
3037 | by two different declarations in the same scope. */ | |
33bd39a2 | 3038 | error ("redefinition of default argument for `%#D'", parm); |
8251199e | 3039 | cp_error_at (" original definition appeared here", tmpl_parm); |
7fe6899f MM |
3040 | return; |
3041 | } | |
3042 | ||
3043 | if (parm_default != NULL_TREE) | |
3044 | /* Update the previous template parameters (which are the ones | |
3045 | that will really count) with the new default value. */ | |
3046 | TREE_PURPOSE (TREE_VEC_ELT (tmpl_parms, i)) = parm_default; | |
7ce74c5e MM |
3047 | else if (tmpl_default != NULL_TREE) |
3048 | /* Update the new parameters, too; they'll be used as the | |
3049 | parameters for any members. */ | |
3050 | TREE_PURPOSE (TREE_VEC_ELT (parms, i)) = tmpl_default; | |
7fe6899f MM |
3051 | } |
3052 | } | |
75650646 | 3053 | |
75650646 MM |
3054 | /* Attempt to convert the non-type template parameter EXPR to the |
3055 | indicated TYPE. If the conversion is successful, return the | |
dc957d14 | 3056 | converted value. If the conversion is unsuccessful, return |
75650646 MM |
3057 | NULL_TREE if we issued an error message, or error_mark_node if we |
3058 | did not. We issue error messages for out-and-out bad template | |
3059 | parameters, but not simply because the conversion failed, since we | |
3060 | might be just trying to do argument deduction. By the time this | |
3061 | function is called, neither TYPE nor EXPR may make use of template | |
3062 | parameters. */ | |
3063 | ||
3064 | static tree | |
e1467ff2 | 3065 | convert_nontype_argument (type, expr) |
75650646 MM |
3066 | tree type; |
3067 | tree expr; | |
3068 | { | |
3069 | tree expr_type = TREE_TYPE (expr); | |
3070 | ||
3071 | /* A template-argument for a non-type, non-template | |
3072 | template-parameter shall be one of: | |
3073 | ||
3074 | --an integral constant-expression of integral or enumeration | |
3075 | type; or | |
3076 | ||
3077 | --the name of a non-type template-parameter; or | |
3078 | ||
3079 | --the name of an object or function with external linkage, | |
3080 | including function templates and function template-ids but | |
86052cc3 | 3081 | excluding non-static class members, expressed as id-expression; |
75650646 MM |
3082 | or |
3083 | ||
3084 | --the address of an object or function with external linkage, | |
3085 | including function templates and function template-ids but | |
3086 | excluding non-static class members, expressed as & id-expression | |
3087 | where the & is optional if the name refers to a function or | |
3088 | array; or | |
3089 | ||
3090 | --a pointer to member expressed as described in _expr.unary.op_. */ | |
3091 | ||
638dd8fc MM |
3092 | /* An integral constant-expression can include const variables or |
3093 | enumerators. Simplify things by folding them to their values, | |
3094 | unless we're about to bind the declaration to a reference | |
3095 | parameter. */ | |
fc611ce0 | 3096 | if (INTEGRAL_TYPE_P (expr_type) |
638dd8fc | 3097 | && TREE_CODE (type) != REFERENCE_TYPE) |
86052cc3 JM |
3098 | expr = decl_constant_value (expr); |
3099 | ||
7bf2682f MM |
3100 | if (is_overloaded_fn (expr)) |
3101 | /* OK for now. We'll check that it has external linkage later. | |
3102 | Check this first since if expr_type is the unknown_type_node | |
3103 | we would otherwise complain below. */ | |
3104 | ; | |
e08a8f45 MM |
3105 | else if (TYPE_PTRMEM_P (expr_type) |
3106 | || TYPE_PTRMEMFUNC_P (expr_type)) | |
3107 | { | |
3108 | if (TREE_CODE (expr) != PTRMEM_CST) | |
3109 | goto bad_argument; | |
3110 | } | |
f3400fe2 | 3111 | else if (TYPE_PTR_P (expr_type) |
e08a8f45 | 3112 | || TYPE_PTRMEM_P (expr_type) |
f3400fe2 JM |
3113 | || TREE_CODE (expr_type) == ARRAY_TYPE |
3114 | || TREE_CODE (type) == REFERENCE_TYPE | |
75650646 MM |
3115 | /* If expr is the address of an overloaded function, we |
3116 | will get the unknown_type_node at this point. */ | |
3117 | || expr_type == unknown_type_node) | |
3118 | { | |
3119 | tree referent; | |
49bf0d6f MM |
3120 | tree e = expr; |
3121 | STRIP_NOPS (e); | |
75650646 | 3122 | |
0dc09a61 MM |
3123 | if (TREE_CODE (expr_type) == ARRAY_TYPE |
3124 | || (TREE_CODE (type) == REFERENCE_TYPE | |
3125 | && TREE_CODE (e) != ADDR_EXPR)) | |
f3400fe2 JM |
3126 | referent = e; |
3127 | else | |
75650646 | 3128 | { |
f3400fe2 JM |
3129 | if (TREE_CODE (e) != ADDR_EXPR) |
3130 | { | |
3131 | bad_argument: | |
33bd39a2 | 3132 | error ("`%E' is not a valid template argument", expr); |
e08a8f45 MM |
3133 | if (TYPE_PTR_P (expr_type)) |
3134 | { | |
3135 | if (TREE_CODE (TREE_TYPE (expr_type)) == FUNCTION_TYPE) | |
33bd39a2 | 3136 | error ("it must be the address of a function with external linkage"); |
e08a8f45 | 3137 | else |
33bd39a2 | 3138 | error ("it must be the address of an object with external linkage"); |
e08a8f45 MM |
3139 | } |
3140 | else if (TYPE_PTRMEM_P (expr_type) | |
3141 | || TYPE_PTRMEMFUNC_P (expr_type)) | |
33bd39a2 | 3142 | error ("it must be a pointer-to-member of the form `&X::Y'"); |
e08a8f45 | 3143 | |
f3400fe2 JM |
3144 | return NULL_TREE; |
3145 | } | |
3146 | ||
3147 | referent = TREE_OPERAND (e, 0); | |
3148 | STRIP_NOPS (referent); | |
75650646 MM |
3149 | } |
3150 | ||
75650646 MM |
3151 | if (TREE_CODE (referent) == STRING_CST) |
3152 | { | |
33bd39a2 | 3153 | error ("string literal %E is not a valid template argument because it is the address of an object with static linkage", |
75650646 | 3154 | referent); |
75650646 MM |
3155 | return NULL_TREE; |
3156 | } | |
3157 | ||
3158 | if (is_overloaded_fn (referent)) | |
3159 | /* We'll check that it has external linkage later. */ | |
3160 | ; | |
3161 | else if (TREE_CODE (referent) != VAR_DECL) | |
3162 | goto bad_argument; | |
ad50e811 | 3163 | else if (!DECL_EXTERNAL_LINKAGE_P (referent)) |
75650646 | 3164 | { |
33bd39a2 | 3165 | error ("address of non-extern `%E' cannot be used as template argument", referent); |
75650646 MM |
3166 | return error_mark_node; |
3167 | } | |
3168 | } | |
f3400fe2 JM |
3169 | else if (INTEGRAL_TYPE_P (expr_type) |
3170 | || TYPE_PTRMEM_P (expr_type) | |
e5844e6d | 3171 | || TYPE_PTRMEMFUNC_P (expr_type)) |
75650646 | 3172 | { |
f3400fe2 JM |
3173 | if (! TREE_CONSTANT (expr)) |
3174 | { | |
3175 | non_constant: | |
33bd39a2 | 3176 | error ("non-constant `%E' cannot be used as template argument", |
f3400fe2 JM |
3177 | expr); |
3178 | return NULL_TREE; | |
3179 | } | |
75650646 | 3180 | } |
75650646 MM |
3181 | else |
3182 | { | |
33bd39a2 | 3183 | error ("object `%E' cannot be used as template argument", expr); |
75650646 MM |
3184 | return NULL_TREE; |
3185 | } | |
3186 | ||
3187 | switch (TREE_CODE (type)) | |
3188 | { | |
3189 | case INTEGER_TYPE: | |
3190 | case BOOLEAN_TYPE: | |
3191 | case ENUMERAL_TYPE: | |
3192 | /* For a non-type template-parameter of integral or enumeration | |
3193 | type, integral promotions (_conv.prom_) and integral | |
c6002625 | 3194 | conversions (_conv.integral_) are applied. */ |
75650646 MM |
3195 | if (!INTEGRAL_TYPE_P (expr_type)) |
3196 | return error_mark_node; | |
3197 | ||
3198 | /* It's safe to call digest_init in this case; we know we're | |
3199 | just converting one integral constant expression to another. */ | |
db02b6b9 | 3200 | expr = digest_init (type, expr, (tree*) 0); |
75650646 | 3201 | |
db02b6b9 | 3202 | if (TREE_CODE (expr) != INTEGER_CST) |
f3400fe2 | 3203 | /* Curiously, some TREE_CONSTANT integral expressions do not |
db02b6b9 MM |
3204 | simplify to integer constants. For example, `3 % 0', |
3205 | remains a TRUNC_MOD_EXPR. */ | |
3206 | goto non_constant; | |
3207 | ||
3208 | return expr; | |
3209 | ||
75650646 MM |
3210 | case POINTER_TYPE: |
3211 | { | |
3212 | tree type_pointed_to = TREE_TYPE (type); | |
3213 | ||
3214 | if (TYPE_PTRMEM_P (type)) | |
93aa462d MM |
3215 | { |
3216 | tree e; | |
3217 | ||
3218 | /* For a non-type template-parameter of type pointer to data | |
3219 | member, qualification conversions (_conv.qual_) are | |
3220 | applied. */ | |
3221 | e = perform_qualification_conversions (type, expr); | |
3222 | if (TREE_CODE (e) == NOP_EXPR) | |
87533b37 MM |
3223 | /* The call to perform_qualification_conversions will |
3224 | insert a NOP_EXPR over EXPR to do express conversion, | |
3225 | if necessary. But, that will confuse us if we use | |
3226 | this (converted) template parameter to instantiate | |
3227 | another template; then the thing will not look like a | |
3228 | valid template argument. So, just make a new | |
3229 | constant, of the appropriate type. */ | |
3230 | e = make_ptrmem_cst (type, PTRMEM_CST_MEMBER (expr)); | |
93aa462d MM |
3231 | return e; |
3232 | } | |
75650646 MM |
3233 | else if (TREE_CODE (type_pointed_to) == FUNCTION_TYPE) |
3234 | { | |
3235 | /* For a non-type template-parameter of type pointer to | |
3236 | function, only the function-to-pointer conversion | |
3237 | (_conv.func_) is applied. If the template-argument | |
3238 | represents a set of overloaded functions (or a pointer to | |
3239 | such), the matching function is selected from the set | |
3240 | (_over.over_). */ | |
3241 | tree fns; | |
3242 | tree fn; | |
3243 | ||
7bf2682f | 3244 | if (TREE_CODE (expr) == ADDR_EXPR) |
75650646 MM |
3245 | fns = TREE_OPERAND (expr, 0); |
3246 | else | |
3247 | fns = expr; | |
3248 | ||
c2ea3a40 | 3249 | fn = instantiate_type (type_pointed_to, fns, tf_none); |
75650646 MM |
3250 | |
3251 | if (fn == error_mark_node) | |
3252 | return error_mark_node; | |
3253 | ||
ad50e811 | 3254 | if (!DECL_EXTERNAL_LINKAGE_P (fn)) |
75650646 MM |
3255 | { |
3256 | if (really_overloaded_fn (fns)) | |
3257 | return error_mark_node; | |
3258 | else | |
3259 | goto bad_argument; | |
3260 | } | |
3261 | ||
3262 | expr = build_unary_op (ADDR_EXPR, fn, 0); | |
3263 | ||
3bfdc719 | 3264 | my_friendly_assert (same_type_p (type, TREE_TYPE (expr)), |
75650646 MM |
3265 | 0); |
3266 | return expr; | |
3267 | } | |
3268 | else | |
3269 | { | |
3270 | /* For a non-type template-parameter of type pointer to | |
3271 | object, qualification conversions (_conv.qual_) and the | |
3272 | array-to-pointer conversion (_conv.array_) are applied. | |
3273 | [Note: In particular, neither the null pointer conversion | |
3274 | (_conv.ptr_) nor the derived-to-base conversion | |
3275 | (_conv.ptr_) are applied. Although 0 is a valid | |
3276 | template-argument for a non-type template-parameter of | |
3277 | integral type, it is not a valid template-argument for a | |
e1467ff2 MM |
3278 | non-type template-parameter of pointer type.] |
3279 | ||
3280 | The call to decay_conversion performs the | |
3281 | array-to-pointer conversion, if appropriate. */ | |
3282 | expr = decay_conversion (expr); | |
75650646 MM |
3283 | |
3284 | if (expr == error_mark_node) | |
3285 | return error_mark_node; | |
3286 | else | |
3287 | return perform_qualification_conversions (type, expr); | |
3288 | } | |
3289 | } | |
3290 | break; | |
3291 | ||
3292 | case REFERENCE_TYPE: | |
3293 | { | |
3294 | tree type_referred_to = TREE_TYPE (type); | |
3295 | ||
0dc09a61 MM |
3296 | /* If this expression already has reference type, get the |
3297 | underling object. */ | |
3298 | if (TREE_CODE (expr_type) == REFERENCE_TYPE) | |
3299 | { | |
3300 | my_friendly_assert (TREE_CODE (expr) == ADDR_EXPR, 20000604); | |
3301 | expr = TREE_OPERAND (expr, 0); | |
3302 | expr_type = TREE_TYPE (expr); | |
3303 | } | |
3304 | ||
75650646 MM |
3305 | if (TREE_CODE (type_referred_to) == FUNCTION_TYPE) |
3306 | { | |
3307 | /* For a non-type template-parameter of type reference to | |
39c01e4c MM |
3308 | function, no conversions apply. If the |
3309 | template-argument represents a set of overloaded | |
3310 | functions, the matching function is selected from the | |
3311 | set (_over.over_). */ | |
75650646 MM |
3312 | tree fn; |
3313 | ||
c2ea3a40 | 3314 | fn = instantiate_type (type_referred_to, expr, tf_none); |
e6e174e5 JM |
3315 | |
3316 | if (fn == error_mark_node) | |
3317 | return error_mark_node; | |
75650646 | 3318 | |
ad50e811 | 3319 | if (!DECL_EXTERNAL_LINKAGE_P (fn)) |
75650646 | 3320 | { |
0dc09a61 | 3321 | if (really_overloaded_fn (expr)) |
75650646 MM |
3322 | /* Don't issue an error here; we might get a different |
3323 | function if the overloading had worked out | |
3324 | differently. */ | |
3325 | return error_mark_node; | |
3326 | else | |
3327 | goto bad_argument; | |
3328 | } | |
3329 | ||
3bfdc719 MM |
3330 | my_friendly_assert (same_type_p (type_referred_to, |
3331 | TREE_TYPE (fn)), | |
75650646 MM |
3332 | 0); |
3333 | ||
0dc09a61 | 3334 | expr = fn; |
75650646 MM |
3335 | } |
3336 | else | |
3337 | { | |
3338 | /* For a non-type template-parameter of type reference to | |
3339 | object, no conversions apply. The type referred to by the | |
3340 | reference may be more cv-qualified than the (otherwise | |
3341 | identical) type of the template-argument. The | |
3342 | template-parameter is bound directly to the | |
3343 | template-argument, which must be an lvalue. */ | |
0dc09a61 MM |
3344 | if (!same_type_p (TYPE_MAIN_VARIANT (expr_type), |
3345 | TYPE_MAIN_VARIANT (type_referred_to)) | |
91063b51 MM |
3346 | || !at_least_as_qualified_p (type_referred_to, |
3347 | expr_type) | |
75650646 | 3348 | || !real_lvalue_p (expr)) |
fd74ca0b | 3349 | return error_mark_node; |
75650646 | 3350 | } |
0dc09a61 | 3351 | |
dffd7eb6 | 3352 | cxx_mark_addressable (expr); |
0dc09a61 | 3353 | return build1 (ADDR_EXPR, type, expr); |
75650646 MM |
3354 | } |
3355 | break; | |
3356 | ||
3357 | case RECORD_TYPE: | |
3358 | { | |
db3f4e4e | 3359 | my_friendly_assert (TYPE_PTRMEMFUNC_P (type), 20010112); |
75650646 MM |
3360 | |
3361 | /* For a non-type template-parameter of type pointer to member | |
3362 | function, no conversions apply. If the template-argument | |
3363 | represents a set of overloaded member functions, the | |
3364 | matching member function is selected from the set | |
3365 | (_over.over_). */ | |
3366 | ||
3367 | if (!TYPE_PTRMEMFUNC_P (expr_type) && | |
3368 | expr_type != unknown_type_node) | |
3369 | return error_mark_node; | |
3370 | ||
e08a8f45 | 3371 | if (TREE_CODE (expr) == PTRMEM_CST) |
75650646 MM |
3372 | { |
3373 | /* A ptr-to-member constant. */ | |
3bfdc719 | 3374 | if (!same_type_p (type, expr_type)) |
75650646 MM |
3375 | return error_mark_node; |
3376 | else | |
3377 | return expr; | |
3378 | } | |
3379 | ||
3380 | if (TREE_CODE (expr) != ADDR_EXPR) | |
3381 | return error_mark_node; | |
3382 | ||
c2ea3a40 | 3383 | expr = instantiate_type (type, expr, tf_none); |
75650646 | 3384 | |
d8f8dca1 | 3385 | if (expr == error_mark_node) |
75650646 MM |
3386 | return error_mark_node; |
3387 | ||
3bfdc719 | 3388 | my_friendly_assert (same_type_p (type, TREE_TYPE (expr)), |
75650646 MM |
3389 | 0); |
3390 | return expr; | |
3391 | } | |
3392 | break; | |
3393 | ||
3394 | default: | |
3395 | /* All non-type parameters must have one of these types. */ | |
a98facb0 | 3396 | abort (); |
75650646 MM |
3397 | break; |
3398 | } | |
3399 | ||
3400 | return error_mark_node; | |
3401 | } | |
3402 | ||
744fac59 KL |
3403 | /* Return 1 if PARM_PARMS and ARG_PARMS matches using rule for |
3404 | template template parameters. Both PARM_PARMS and ARG_PARMS are | |
3405 | vectors of TREE_LIST nodes containing TYPE_DECL, TEMPLATE_DECL | |
3406 | or PARM_DECL. | |
3407 | ||
3408 | ARG_PARMS may contain more parameters than PARM_PARMS. If this is | |
3409 | the case, then extra parameters must have default arguments. | |
3410 | ||
3411 | Consider the example: | |
3412 | template <class T, class Allocator = allocator> class vector; | |
3413 | template<template <class U> class TT> class C; | |
3414 | ||
3415 | C<vector> is a valid instantiation. PARM_PARMS for the above code | |
3416 | contains a TYPE_DECL (for U), ARG_PARMS contains two TYPE_DECLs (for | |
3417 | T and Allocator) and OUTER_ARGS contains the argument that is used to | |
3418 | substitute the TT parameter. */ | |
3419 | ||
3420 | static int | |
4393e105 MM |
3421 | coerce_template_template_parms (parm_parms, arg_parms, complain, |
3422 | in_decl, outer_args) | |
3423 | tree parm_parms, arg_parms; | |
c2ea3a40 | 3424 | tsubst_flags_t complain; |
4393e105 | 3425 | tree in_decl, outer_args; |
744fac59 KL |
3426 | { |
3427 | int nparms, nargs, i; | |
3428 | tree parm, arg; | |
3429 | ||
3430 | my_friendly_assert (TREE_CODE (parm_parms) == TREE_VEC, 0); | |
3431 | my_friendly_assert (TREE_CODE (arg_parms) == TREE_VEC, 0); | |
3432 | ||
3433 | nparms = TREE_VEC_LENGTH (parm_parms); | |
3434 | nargs = TREE_VEC_LENGTH (arg_parms); | |
3435 | ||
3436 | /* The rule here is opposite of coerce_template_parms. */ | |
3437 | if (nargs < nparms | |
3438 | || (nargs > nparms | |
3439 | && TREE_PURPOSE (TREE_VEC_ELT (arg_parms, nparms)) == NULL_TREE)) | |
3440 | return 0; | |
3441 | ||
3442 | for (i = 0; i < nparms; ++i) | |
3443 | { | |
3444 | parm = TREE_VALUE (TREE_VEC_ELT (parm_parms, i)); | |
3445 | arg = TREE_VALUE (TREE_VEC_ELT (arg_parms, i)); | |
3446 | ||
3447 | if (arg == NULL_TREE || arg == error_mark_node | |
3448 | || parm == NULL_TREE || parm == error_mark_node) | |
3449 | return 0; | |
3450 | ||
3451 | if (TREE_CODE (arg) != TREE_CODE (parm)) | |
3452 | return 0; | |
3453 | ||
3454 | switch (TREE_CODE (parm)) | |
3455 | { | |
3456 | case TYPE_DECL: | |
3457 | break; | |
3458 | ||
3459 | case TEMPLATE_DECL: | |
3460 | /* We encounter instantiations of templates like | |
3461 | template <template <template <class> class> class TT> | |
3462 | class C; */ | |
700466c2 JM |
3463 | { |
3464 | tree parmparm = DECL_INNERMOST_TEMPLATE_PARMS (parm); | |
3465 | tree argparm = DECL_INNERMOST_TEMPLATE_PARMS (arg); | |
3466 | ||
3467 | if (!coerce_template_template_parms (parmparm, argparm, | |
4393e105 MM |
3468 | complain, in_decl, |
3469 | outer_args)) | |
700466c2 JM |
3470 | return 0; |
3471 | } | |
3472 | break; | |
744fac59 KL |
3473 | |
3474 | case PARM_DECL: | |
3475 | /* The tsubst call is used to handle cases such as | |
3476 | template <class T, template <T> class TT> class D; | |
3477 | i.e. the parameter list of TT depends on earlier parameters. */ | |
4393e105 MM |
3478 | if (!same_type_p (tsubst (TREE_TYPE (parm), outer_args, |
3479 | complain, in_decl), | |
3bfdc719 | 3480 | TREE_TYPE (arg))) |
744fac59 KL |
3481 | return 0; |
3482 | break; | |
3483 | ||
3484 | default: | |
a98facb0 | 3485 | abort (); |
744fac59 KL |
3486 | } |
3487 | } | |
3488 | return 1; | |
3489 | } | |
3490 | ||
8b5b8b7c MM |
3491 | /* Convert the indicated template ARG as necessary to match the |
3492 | indicated template PARM. Returns the converted ARG, or | |
c2ea3a40 NS |
3493 | error_mark_node if the conversion was unsuccessful. Error and |
3494 | warning messages are issued under control of COMPLAIN. This | |
3495 | conversion is for the Ith parameter in the parameter list. ARGS is | |
3496 | the full set of template arguments deduced so far. */ | |
8b5b8b7c MM |
3497 | |
3498 | static tree | |
3499 | convert_template_argument (parm, arg, args, complain, i, in_decl) | |
3500 | tree parm; | |
3501 | tree arg; | |
3502 | tree args; | |
c2ea3a40 | 3503 | tsubst_flags_t complain; |
8b5b8b7c MM |
3504 | int i; |
3505 | tree in_decl; | |
3506 | { | |
3507 | tree val; | |
3508 | tree inner_args; | |
3509 | int is_type, requires_type, is_tmpl_type, requires_tmpl_type; | |
3510 | ||
f9a7ae04 | 3511 | inner_args = INNERMOST_TEMPLATE_ARGS (args); |
8b5b8b7c MM |
3512 | |
3513 | if (TREE_CODE (arg) == TREE_LIST | |
3514 | && TREE_TYPE (arg) != NULL_TREE | |
3515 | && TREE_CODE (TREE_TYPE (arg)) == OFFSET_TYPE) | |
3516 | { | |
3517 | /* The template argument was the name of some | |
3518 | member function. That's usually | |
0e339752 | 3519 | invalid, but static members are OK. In any |
8b5b8b7c MM |
3520 | case, grab the underlying fields/functions |
3521 | and issue an error later if required. */ | |
3522 | arg = TREE_VALUE (arg); | |
3523 | TREE_TYPE (arg) = unknown_type_node; | |
3524 | } | |
3525 | ||
3526 | requires_tmpl_type = TREE_CODE (parm) == TEMPLATE_DECL; | |
3527 | requires_type = (TREE_CODE (parm) == TYPE_DECL | |
3528 | || requires_tmpl_type); | |
3529 | ||
303d1c55 NS |
3530 | if (TREE_CODE (arg) != RECORD_TYPE) |
3531 | is_tmpl_type = ((TREE_CODE (arg) == TEMPLATE_DECL | |
3532 | && TREE_CODE (DECL_TEMPLATE_RESULT (arg)) == TYPE_DECL) | |
3533 | || TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM | |
3534 | || TREE_CODE (arg) == UNBOUND_CLASS_TEMPLATE); | |
3535 | else if (CLASSTYPE_TEMPLATE_INFO (arg) && !CLASSTYPE_USE_TEMPLATE (arg) | |
3536 | && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (arg))) | |
3537 | { | |
3538 | if (is_base_of_enclosing_class (arg, current_class_type)) | |
3539 | /* This is a template name used within the scope of the | |
3540 | template. It could be the template, or it could be the | |
3541 | instantiation. Choose whichever makes sense. */ | |
3542 | is_tmpl_type = requires_tmpl_type; | |
3543 | else | |
3544 | is_tmpl_type = 1; | |
3545 | } | |
3546 | else | |
3547 | /* It is a non-template class, or a specialization of a template | |
3548 | class, or a non-template member of a template class. */ | |
3549 | is_tmpl_type = 0; | |
3550 | ||
b8c6534b KL |
3551 | if (is_tmpl_type |
3552 | && (TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM | |
3553 | || TREE_CODE (arg) == UNBOUND_CLASS_TEMPLATE)) | |
8b5b8b7c MM |
3554 | arg = TYPE_STUB_DECL (arg); |
3555 | else if (is_tmpl_type && TREE_CODE (arg) == RECORD_TYPE) | |
3556 | arg = CLASSTYPE_TI_TEMPLATE (arg); | |
3557 | ||
2f939d94 | 3558 | is_type = TYPE_P (arg) || is_tmpl_type; |
8b5b8b7c MM |
3559 | |
3560 | if (requires_type && ! is_type && TREE_CODE (arg) == SCOPE_REF | |
3561 | && TREE_CODE (TREE_OPERAND (arg, 0)) == TEMPLATE_TYPE_PARM) | |
3562 | { | |
33bd39a2 | 3563 | pedwarn ("to refer to a type member of a template parameter, use `typename %E'", arg); |
8b5b8b7c MM |
3564 | |
3565 | arg = make_typename_type (TREE_OPERAND (arg, 0), | |
3baa501d | 3566 | TREE_OPERAND (arg, 1), |
c2ea3a40 | 3567 | complain & tf_error); |
8b5b8b7c MM |
3568 | is_type = 1; |
3569 | } | |
3570 | if (is_type != requires_type) | |
3571 | { | |
3572 | if (in_decl) | |
3573 | { | |
c2ea3a40 | 3574 | if (complain & tf_error) |
8b5b8b7c | 3575 | { |
33bd39a2 | 3576 | error ("type/value mismatch at argument %d in template parameter list for `%D'", |
8b5b8b7c MM |
3577 | i + 1, in_decl); |
3578 | if (is_type) | |
33bd39a2 | 3579 | error (" expected a constant of type `%T', got `%T'", |
8b5b8b7c MM |
3580 | TREE_TYPE (parm), |
3581 | (is_tmpl_type ? DECL_NAME (arg) : arg)); | |
d12a7283 KL |
3582 | else if (requires_tmpl_type) |
3583 | error (" expected a class template, got `%E'", arg); | |
8b5b8b7c | 3584 | else |
33bd39a2 | 3585 | error (" expected a type, got `%E'", arg); |
8b5b8b7c MM |
3586 | } |
3587 | } | |
3588 | return error_mark_node; | |
3589 | } | |
3590 | if (is_tmpl_type ^ requires_tmpl_type) | |
3591 | { | |
c2ea3a40 | 3592 | if (in_decl && (complain & tf_error)) |
8b5b8b7c | 3593 | { |
33bd39a2 | 3594 | error ("type/value mismatch at argument %d in template parameter list for `%D'", |
8b5b8b7c MM |
3595 | i + 1, in_decl); |
3596 | if (is_tmpl_type) | |
33bd39a2 | 3597 | error (" expected a type, got `%T'", DECL_NAME (arg)); |
8b5b8b7c | 3598 | else |
33bd39a2 | 3599 | error (" expected a class template, got `%T'", arg); |
8b5b8b7c MM |
3600 | } |
3601 | return error_mark_node; | |
3602 | } | |
3603 | ||
3604 | if (is_type) | |
3605 | { | |
3606 | if (requires_tmpl_type) | |
3607 | { | |
b8c6534b KL |
3608 | if (TREE_CODE (TREE_TYPE (arg)) == UNBOUND_CLASS_TEMPLATE) |
3609 | /* The number of argument required is not known yet. | |
3610 | Just accept it for now. */ | |
3611 | val = TREE_TYPE (arg); | |
8b5b8b7c MM |
3612 | else |
3613 | { | |
b8c6534b KL |
3614 | tree parmparm = DECL_INNERMOST_TEMPLATE_PARMS (parm); |
3615 | tree argparm = DECL_INNERMOST_TEMPLATE_PARMS (arg); | |
3616 | ||
3617 | if (coerce_template_template_parms (parmparm, argparm, | |
3618 | complain, in_decl, | |
3619 | inner_args)) | |
8b5b8b7c | 3620 | { |
b8c6534b KL |
3621 | val = arg; |
3622 | ||
3623 | /* TEMPLATE_TEMPLATE_PARM node is preferred over | |
3624 | TEMPLATE_DECL. */ | |
3625 | if (val != error_mark_node | |
3626 | && DECL_TEMPLATE_TEMPLATE_PARM_P (val)) | |
3627 | val = TREE_TYPE (val); | |
8b5b8b7c | 3628 | } |
b8c6534b KL |
3629 | else |
3630 | { | |
c2ea3a40 | 3631 | if (in_decl && (complain & tf_error)) |
b8c6534b | 3632 | { |
33bd39a2 | 3633 | error ("type/value mismatch at argument %d in template parameter list for `%D'", |
b8c6534b | 3634 | i + 1, in_decl); |
33bd39a2 | 3635 | error (" expected a template of type `%D', got `%D'", parm, arg); |
b8c6534b | 3636 | } |
8b5b8b7c | 3637 | |
b8c6534b KL |
3638 | val = error_mark_node; |
3639 | } | |
8b5b8b7c MM |
3640 | } |
3641 | } | |
3642 | else | |
3e4a3562 | 3643 | val = groktypename (arg); |
8b5b8b7c MM |
3644 | } |
3645 | else | |
3646 | { | |
4393e105 | 3647 | tree t = tsubst (TREE_TYPE (parm), args, complain, in_decl); |
8b5b8b7c | 3648 | |
11b810f1 | 3649 | if (invalid_nontype_parm_type_p (t, complain)) |
db3f4e4e NS |
3650 | return error_mark_node; |
3651 | ||
d768a589 | 3652 | if (processing_template_decl) |
8b5b8b7c MM |
3653 | arg = maybe_fold_nontype_arg (arg); |
3654 | ||
d768a589 | 3655 | if (!uses_template_parms (arg) && !uses_template_parms (t)) |
8b5b8b7c MM |
3656 | /* We used to call digest_init here. However, digest_init |
3657 | will report errors, which we don't want when complain | |
3658 | is zero. More importantly, digest_init will try too | |
3659 | hard to convert things: for example, `0' should not be | |
3660 | converted to pointer type at this point according to | |
3661 | the standard. Accepting this is not merely an | |
3662 | extension, since deciding whether or not these | |
3663 | conversions can occur is part of determining which | |
dc957d14 | 3664 | function template to call, or whether a given explicit |
0e339752 | 3665 | argument specification is valid. */ |
8b5b8b7c MM |
3666 | val = convert_nontype_argument (t, arg); |
3667 | else | |
3668 | val = arg; | |
3669 | ||
3670 | if (val == NULL_TREE) | |
3671 | val = error_mark_node; | |
c2ea3a40 | 3672 | else if (val == error_mark_node && (complain & tf_error)) |
33bd39a2 | 3673 | error ("could not convert template argument `%E' to `%T'", |
8b5b8b7c MM |
3674 | arg, t); |
3675 | } | |
3676 | ||
3677 | return val; | |
3678 | } | |
3679 | ||
3680 | /* Convert all template arguments to their appropriate types, and | |
3681 | return a vector containing the innermost resulting template | |
c2ea3a40 | 3682 | arguments. If any error occurs, return error_mark_node. Error and |
3e4a3562 | 3683 | warning messages are issued under control of COMPLAIN. |
75650646 | 3684 | |
838dfd8a | 3685 | If REQUIRE_ALL_ARGUMENTS is nonzero, all arguments must be |
75650646 MM |
3686 | provided in ARGLIST, or else trailing parameters must have default |
3687 | values. If REQUIRE_ALL_ARGUMENTS is zero, we will attempt argument | |
6dfbb909 | 3688 | deduction for any unspecified trailing arguments. */ |
de575009 | 3689 | |
8d08fdba | 3690 | static tree |
8b5b8b7c | 3691 | coerce_template_parms (parms, args, in_decl, |
75650646 | 3692 | complain, |
744fac59 | 3693 | require_all_arguments) |
8b5b8b7c | 3694 | tree parms, args; |
8d08fdba | 3695 | tree in_decl; |
c2ea3a40 | 3696 | tsubst_flags_t complain; |
75650646 | 3697 | int require_all_arguments; |
8d08fdba | 3698 | { |
a292b002 | 3699 | int nparms, nargs, i, lost = 0; |
e4a84209 | 3700 | tree inner_args; |
8b5b8b7c MM |
3701 | tree new_args; |
3702 | tree new_inner_args; | |
a292b002 | 3703 | |
f9a7ae04 | 3704 | inner_args = INNERMOST_TEMPLATE_ARGS (args); |
e4a84209 | 3705 | nargs = NUM_TMPL_ARGS (inner_args); |
a292b002 MS |
3706 | nparms = TREE_VEC_LENGTH (parms); |
3707 | ||
3708 | if (nargs > nparms | |
3709 | || (nargs < nparms | |
75650646 | 3710 | && require_all_arguments |
a292b002 | 3711 | && TREE_PURPOSE (TREE_VEC_ELT (parms, nargs)) == NULL_TREE)) |
8d08fdba | 3712 | { |
c2ea3a40 | 3713 | if (complain & tf_error) |
75650646 | 3714 | { |
33bd39a2 | 3715 | error ("wrong number of template arguments (%d, should be %d)", |
e4a84209 | 3716 | nargs, nparms); |
75650646 MM |
3717 | |
3718 | if (in_decl) | |
8251199e | 3719 | cp_error_at ("provided for `%D'", in_decl); |
75650646 MM |
3720 | } |
3721 | ||
8d08fdba MS |
3722 | return error_mark_node; |
3723 | } | |
3724 | ||
f31c0a32 | 3725 | new_inner_args = make_tree_vec (nparms); |
8b5b8b7c MM |
3726 | new_args = add_outermost_template_args (args, new_inner_args); |
3727 | for (i = 0; i < nparms; i++) | |
8d08fdba | 3728 | { |
8b5b8b7c MM |
3729 | tree arg; |
3730 | tree parm; | |
e4a84209 | 3731 | |
8b5b8b7c MM |
3732 | /* Get the Ith template parameter. */ |
3733 | parm = TREE_VEC_ELT (parms, i); | |
75650646 | 3734 | |
8b5b8b7c MM |
3735 | /* Calculate the Ith argument. */ |
3736 | if (inner_args && TREE_CODE (inner_args) == TREE_LIST) | |
8d08fdba | 3737 | { |
8b5b8b7c MM |
3738 | arg = TREE_VALUE (inner_args); |
3739 | inner_args = TREE_CHAIN (inner_args); | |
8d08fdba | 3740 | } |
8b5b8b7c MM |
3741 | else if (i < nargs) |
3742 | arg = TREE_VEC_ELT (inner_args, i); | |
3743 | /* If no template argument was supplied, look for a default | |
3744 | value. */ | |
3745 | else if (TREE_PURPOSE (parm) == NULL_TREE) | |
3746 | { | |
3747 | /* There was no default value. */ | |
3748 | my_friendly_assert (!require_all_arguments, 0); | |
3749 | break; | |
3750 | } | |
3751 | else if (TREE_CODE (TREE_VALUE (parm)) == TYPE_DECL) | |
4393e105 | 3752 | arg = tsubst (TREE_PURPOSE (parm), new_args, complain, in_decl); |
8b5b8b7c | 3753 | else |
4393e105 MM |
3754 | arg = tsubst_expr (TREE_PURPOSE (parm), new_args, complain, |
3755 | in_decl); | |
e4a84209 | 3756 | |
8b5b8b7c | 3757 | /* Now, convert the Ith argument, as necessary. */ |
75650646 MM |
3758 | if (arg == NULL_TREE) |
3759 | /* We're out of arguments. */ | |
3760 | { | |
3761 | my_friendly_assert (!require_all_arguments, 0); | |
3762 | break; | |
3763 | } | |
8b5b8b7c | 3764 | else if (arg == error_mark_node) |
75650646 | 3765 | { |
33bd39a2 | 3766 | error ("template argument %d is invalid", i + 1); |
8b5b8b7c | 3767 | arg = error_mark_node; |
8d08fdba | 3768 | } |
8b5b8b7c MM |
3769 | else |
3770 | arg = convert_template_argument (TREE_VALUE (parm), | |
3771 | arg, new_args, complain, i, | |
3772 | in_decl); | |
3773 | ||
3774 | if (arg == error_mark_node) | |
8d08fdba | 3775 | lost++; |
8b5b8b7c | 3776 | TREE_VEC_ELT (new_inner_args, i) = arg; |
8d08fdba | 3777 | } |
8b5b8b7c | 3778 | |
8d08fdba MS |
3779 | if (lost) |
3780 | return error_mark_node; | |
8b5b8b7c MM |
3781 | |
3782 | return new_inner_args; | |
8d08fdba MS |
3783 | } |
3784 | ||
34016c81 JM |
3785 | /* Returns 1 if template args OT and NT are equivalent. */ |
3786 | ||
d8e178a0 | 3787 | static int |
34016c81 JM |
3788 | template_args_equal (ot, nt) |
3789 | tree ot, nt; | |
3790 | { | |
3791 | if (nt == ot) | |
3792 | return 1; | |
74601d7c | 3793 | |
34016c81 JM |
3794 | if (TREE_CODE (nt) == TREE_VEC) |
3795 | /* For member templates */ | |
74601d7c KL |
3796 | return TREE_CODE (ot) == TREE_VEC && comp_template_args (ot, nt); |
3797 | else if (TYPE_P (nt)) | |
3798 | return TYPE_P (ot) && same_type_p (ot, nt); | |
3799 | else if (TREE_CODE (ot) == TREE_VEC || TYPE_P (ot)) | |
3800 | return 0; | |
34016c81 JM |
3801 | else |
3802 | return (cp_tree_equal (ot, nt) > 0); | |
3803 | } | |
3804 | ||
3805 | /* Returns 1 iff the OLDARGS and NEWARGS are in fact identical sets | |
f84b4be9 JM |
3806 | of template arguments. Returns 0 otherwise. */ |
3807 | ||
6757edfe | 3808 | int |
5566b478 MS |
3809 | comp_template_args (oldargs, newargs) |
3810 | tree oldargs, newargs; | |
3811 | { | |
3812 | int i; | |
3813 | ||
386b8a85 JM |
3814 | if (TREE_VEC_LENGTH (oldargs) != TREE_VEC_LENGTH (newargs)) |
3815 | return 0; | |
3816 | ||
5566b478 MS |
3817 | for (i = 0; i < TREE_VEC_LENGTH (oldargs); ++i) |
3818 | { | |
3819 | tree nt = TREE_VEC_ELT (newargs, i); | |
3820 | tree ot = TREE_VEC_ELT (oldargs, i); | |
3821 | ||
34016c81 | 3822 | if (! template_args_equal (ot, nt)) |
61a127b3 | 3823 | return 0; |
5566b478 MS |
3824 | } |
3825 | return 1; | |
3826 | } | |
3827 | ||
8d08fdba MS |
3828 | /* Given class template name and parameter list, produce a user-friendly name |
3829 | for the instantiation. */ | |
e92cc029 | 3830 | |
8d08fdba | 3831 | static char * |
36a117a5 | 3832 | mangle_class_name_for_template (name, parms, arglist) |
63ad61ed | 3833 | const char *name; |
8d08fdba MS |
3834 | tree parms, arglist; |
3835 | { | |
3836 | static struct obstack scratch_obstack; | |
3837 | static char *scratch_firstobj; | |
3838 | int i, nparms; | |
8d08fdba MS |
3839 | |
3840 | if (!scratch_firstobj) | |
fc378698 | 3841 | gcc_obstack_init (&scratch_obstack); |
8d08fdba MS |
3842 | else |
3843 | obstack_free (&scratch_obstack, scratch_firstobj); | |
fc378698 | 3844 | scratch_firstobj = obstack_alloc (&scratch_obstack, 1); |
8d08fdba | 3845 | |
18e314ad GS |
3846 | #define ccat(C) obstack_1grow (&scratch_obstack, (C)); |
3847 | #define cat(S) obstack_grow (&scratch_obstack, (S), strlen (S)) | |
8d08fdba MS |
3848 | |
3849 | cat (name); | |
3850 | ccat ('<'); | |
3851 | nparms = TREE_VEC_LENGTH (parms); | |
f9a7ae04 | 3852 | arglist = INNERMOST_TEMPLATE_ARGS (arglist); |
8d08fdba MS |
3853 | my_friendly_assert (nparms == TREE_VEC_LENGTH (arglist), 268); |
3854 | for (i = 0; i < nparms; i++) | |
3855 | { | |
a292b002 MS |
3856 | tree parm = TREE_VALUE (TREE_VEC_ELT (parms, i)); |
3857 | tree arg = TREE_VEC_ELT (arglist, i); | |
8d08fdba MS |
3858 | |
3859 | if (i) | |
3860 | ccat (','); | |
3861 | ||
a292b002 | 3862 | if (TREE_CODE (parm) == TYPE_DECL) |
8d08fdba | 3863 | { |
761f0855 | 3864 | cat (type_as_string (arg, TFF_CHASE_TYPEDEF)); |
8d08fdba MS |
3865 | continue; |
3866 | } | |
73b0fce8 KL |
3867 | else if (TREE_CODE (parm) == TEMPLATE_DECL) |
3868 | { | |
3869 | if (TREE_CODE (arg) == TEMPLATE_DECL) | |
2c73f9f5 ML |
3870 | { |
3871 | /* Already substituted with real template. Just output | |
3872 | the template name here */ | |
cb0dbb9a | 3873 | tree context = DECL_CONTEXT (arg); |
ec4f972f AS |
3874 | if (context) |
3875 | { | |
3876 | /* The template may be defined in a namespace, or | |
3877 | may be a member template. */ | |
3878 | my_friendly_assert (TREE_CODE (context) == NAMESPACE_DECL | |
3879 | || CLASS_TYPE_P (context), | |
3880 | 980422); | |
761f0855 | 3881 | cat(decl_as_string (DECL_CONTEXT (arg), TFF_PLAIN_IDENTIFIER)); |
2c73f9f5 ML |
3882 | cat("::"); |
3883 | } | |
3884 | cat (IDENTIFIER_POINTER (DECL_NAME (arg))); | |
3885 | } | |
73b0fce8 KL |
3886 | else |
3887 | /* Output the parameter declaration */ | |
761f0855 | 3888 | cat (type_as_string (arg, TFF_CHASE_TYPEDEF)); |
73b0fce8 KL |
3889 | continue; |
3890 | } | |
8d08fdba MS |
3891 | else |
3892 | my_friendly_assert (TREE_CODE (parm) == PARM_DECL, 269); | |
3893 | ||
3894 | if (TREE_CODE (arg) == TREE_LIST) | |
3895 | { | |
3896 | /* New list cell was built because old chain link was in | |
3897 | use. */ | |
3898 | my_friendly_assert (TREE_PURPOSE (arg) == NULL_TREE, 270); | |
3899 | arg = TREE_VALUE (arg); | |
3900 | } | |
3901 | /* No need to check arglist against parmlist here; we did that | |
3902 | in coerce_template_parms, called from lookup_template_class. */ | |
761f0855 | 3903 | cat (expr_as_string (arg, TFF_PLAIN_IDENTIFIER)); |
8d08fdba MS |
3904 | } |
3905 | { | |
3906 | char *bufp = obstack_next_free (&scratch_obstack); | |
3907 | int offset = 0; | |
3908 | while (bufp[offset - 1] == ' ') | |
3909 | offset--; | |
3910 | obstack_blank_fast (&scratch_obstack, offset); | |
3911 | ||
3912 | /* B<C<char> >, not B<C<char>> */ | |
3913 | if (bufp[offset - 1] == '>') | |
3914 | ccat (' '); | |
3915 | } | |
3916 | ccat ('>'); | |
3917 | ccat ('\0'); | |
3918 | return (char *) obstack_base (&scratch_obstack); | |
8d08fdba MS |
3919 | } |
3920 | ||
bd6dd845 | 3921 | static tree |
5566b478 MS |
3922 | classtype_mangled_name (t) |
3923 | tree t; | |
3924 | { | |
3925 | if (CLASSTYPE_TEMPLATE_INFO (t) | |
36a117a5 MM |
3926 | /* Specializations have already had their names set up in |
3927 | lookup_template_class. */ | |
370af2d5 | 3928 | && !CLASSTYPE_TEMPLATE_SPECIALIZATION (t)) |
9fbf56f7 MM |
3929 | { |
3930 | tree tmpl = most_general_template (CLASSTYPE_TI_TEMPLATE (t)); | |
3931 | ||
36a117a5 MM |
3932 | /* For non-primary templates, the template parameters are |
3933 | implicit from their surrounding context. */ | |
9fbf56f7 MM |
3934 | if (PRIMARY_TEMPLATE_P (tmpl)) |
3935 | { | |
3936 | tree name = DECL_NAME (tmpl); | |
3937 | char *mangled_name = mangle_class_name_for_template | |
3938 | (IDENTIFIER_POINTER (name), | |
3939 | DECL_INNERMOST_TEMPLATE_PARMS (tmpl), | |
3940 | CLASSTYPE_TI_ARGS (t)); | |
3941 | tree id = get_identifier (mangled_name); | |
3942 | IDENTIFIER_TEMPLATE (id) = name; | |
3943 | return id; | |
3944 | } | |
5566b478 | 3945 | } |
9fbf56f7 MM |
3946 | |
3947 | return TYPE_IDENTIFIER (t); | |
5566b478 MS |
3948 | } |
3949 | ||
3950 | static void | |
3951 | add_pending_template (d) | |
3952 | tree d; | |
3953 | { | |
3ae18eaf JM |
3954 | tree ti = (TYPE_P (d) |
3955 | ? CLASSTYPE_TEMPLATE_INFO (d) | |
3956 | : DECL_TEMPLATE_INFO (d)); | |
46ccf50a | 3957 | tree pt; |
3ae18eaf | 3958 | int level; |
e92cc029 | 3959 | |
824b9a4c | 3960 | if (TI_PENDING_TEMPLATE_FLAG (ti)) |
5566b478 MS |
3961 | return; |
3962 | ||
3ae18eaf JM |
3963 | /* We are called both from instantiate_decl, where we've already had a |
3964 | tinst_level pushed, and instantiate_template, where we haven't. | |
3965 | Compensate. */ | |
3966 | level = !(current_tinst_level && TINST_DECL (current_tinst_level) == d); | |
3967 | ||
3968 | if (level) | |
3969 | push_tinst_level (d); | |
3970 | ||
46ccf50a JM |
3971 | pt = tree_cons (current_tinst_level, d, NULL_TREE); |
3972 | if (last_pending_template) | |
3973 | TREE_CHAIN (last_pending_template) = pt; | |
3974 | else | |
3975 | pending_templates = pt; | |
3976 | ||
3977 | last_pending_template = pt; | |
3978 | ||
824b9a4c | 3979 | TI_PENDING_TEMPLATE_FLAG (ti) = 1; |
3ae18eaf JM |
3980 | |
3981 | if (level) | |
3982 | pop_tinst_level (); | |
5566b478 MS |
3983 | } |
3984 | ||
386b8a85 | 3985 | |
4ba126e4 MM |
3986 | /* Return a TEMPLATE_ID_EXPR corresponding to the indicated FNS and |
3987 | ARGLIST. Valid choices for FNS are given in the cp-tree.def | |
3988 | documentation for TEMPLATE_ID_EXPR. */ | |
386b8a85 JM |
3989 | |
3990 | tree | |
3991 | lookup_template_function (fns, arglist) | |
3992 | tree fns, arglist; | |
3993 | { | |
2c73f9f5 | 3994 | tree type; |
050367a3 | 3995 | |
4ba126e4 MM |
3996 | if (fns == error_mark_node || arglist == error_mark_node) |
3997 | return error_mark_node; | |
3998 | ||
386b8a85 JM |
3999 | if (fns == NULL_TREE) |
4000 | { | |
33bd39a2 | 4001 | error ("non-template used as template"); |
386b8a85 JM |
4002 | return error_mark_node; |
4003 | } | |
4004 | ||
4ba126e4 MM |
4005 | my_friendly_assert (TREE_CODE (fns) == TEMPLATE_DECL |
4006 | || TREE_CODE (fns) == OVERLOAD | |
50ad9642 | 4007 | || BASELINK_P (fns) |
4ba126e4 MM |
4008 | || TREE_CODE (fns) == IDENTIFIER_NODE |
4009 | || TREE_CODE (fns) == LOOKUP_EXPR, | |
4010 | 20020730); | |
4011 | ||
50ad9642 MM |
4012 | if (BASELINK_P (fns)) |
4013 | { | |
4014 | BASELINK_FUNCTIONS (fns) = build (TEMPLATE_ID_EXPR, | |
4015 | unknown_type_node, | |
4016 | BASELINK_FUNCTIONS (fns), | |
4017 | arglist); | |
4018 | return fns; | |
4019 | } | |
4020 | ||
2c73f9f5 ML |
4021 | type = TREE_TYPE (fns); |
4022 | if (TREE_CODE (fns) == OVERLOAD || !type) | |
4023 | type = unknown_type_node; | |
4ba126e4 MM |
4024 | |
4025 | return build (TEMPLATE_ID_EXPR, type, fns, arglist); | |
386b8a85 JM |
4026 | } |
4027 | ||
a2b60a0e MM |
4028 | /* Within the scope of a template class S<T>, the name S gets bound |
4029 | (in build_self_reference) to a TYPE_DECL for the class, not a | |
4030 | TEMPLATE_DECL. If DECL is a TYPE_DECL for current_class_type, | |
4031 | or one of its enclosing classes, and that type is a template, | |
4032 | return the associated TEMPLATE_DECL. Otherwise, the original | |
4033 | DECL is returned. */ | |
4034 | ||
a723baf1 | 4035 | tree |
a2b60a0e MM |
4036 | maybe_get_template_decl_from_type_decl (decl) |
4037 | tree decl; | |
4038 | { | |
4039 | return (decl != NULL_TREE | |
4040 | && TREE_CODE (decl) == TYPE_DECL | |
4041 | && DECL_ARTIFICIAL (decl) | |
511b60ff | 4042 | && CLASS_TYPE_P (TREE_TYPE (decl)) |
a2b60a0e MM |
4043 | && CLASSTYPE_TEMPLATE_INFO (TREE_TYPE (decl))) |
4044 | ? CLASSTYPE_TI_TEMPLATE (TREE_TYPE (decl)) : decl; | |
4045 | } | |
386b8a85 | 4046 | |
8d08fdba MS |
4047 | /* Given an IDENTIFIER_NODE (type TEMPLATE_DECL) and a chain of |
4048 | parameters, find the desired type. | |
4049 | ||
4050 | D1 is the PTYPENAME terminal, and ARGLIST is the list of arguments. | |
36a117a5 MM |
4051 | (Actually ARGLIST may be either a TREE_LIST or a TREE_VEC. It will |
4052 | be a TREE_LIST if called directly from the parser, and a TREE_VEC | |
ab097535 | 4053 | otherwise.) |
8d08fdba MS |
4054 | |
4055 | IN_DECL, if non-NULL, is the template declaration we are trying to | |
75650646 MM |
4056 | instantiate. |
4057 | ||
838dfd8a | 4058 | If ENTERING_SCOPE is nonzero, we are about to enter the scope of |
36a117a5 | 4059 | the class we are looking up. |
f9c244b8 | 4060 | |
c2ea3a40 | 4061 | Issue error and warning messages under control of COMPLAIN. |
36a117a5 | 4062 | |
75650646 MM |
4063 | If the template class is really a local class in a template |
4064 | function, then the FUNCTION_CONTEXT is the function in which it is | |
4065 | being instantiated. */ | |
e92cc029 | 4066 | |
8d08fdba | 4067 | tree |
f9c244b8 | 4068 | lookup_template_class (d1, arglist, in_decl, context, entering_scope, complain) |
8d08fdba MS |
4069 | tree d1, arglist; |
4070 | tree in_decl; | |
e1467ff2 | 4071 | tree context; |
36a117a5 | 4072 | int entering_scope; |
c2ea3a40 | 4073 | tsubst_flags_t complain; |
8d08fdba | 4074 | { |
a703fb38 | 4075 | tree template = NULL_TREE, parmlist; |
dbfe2124 | 4076 | tree t; |
5566b478 | 4077 | |
fd295cb2 | 4078 | timevar_push (TV_NAME_LOOKUP); |
5566b478 MS |
4079 | if (TREE_CODE (d1) == IDENTIFIER_NODE) |
4080 | { | |
f181d4ae MM |
4081 | if (IDENTIFIER_VALUE (d1) |
4082 | && DECL_TEMPLATE_TEMPLATE_PARM_P (IDENTIFIER_VALUE (d1))) | |
4083 | template = IDENTIFIER_VALUE (d1); | |
73b0fce8 KL |
4084 | else |
4085 | { | |
2c73f9f5 ML |
4086 | if (context) |
4087 | push_decl_namespace (context); | |
3ebc5c52 MM |
4088 | template = lookup_name (d1, /*prefer_type=*/0); |
4089 | template = maybe_get_template_decl_from_type_decl (template); | |
2c73f9f5 ML |
4090 | if (context) |
4091 | pop_decl_namespace (); | |
73b0fce8 | 4092 | } |
8d019cef JM |
4093 | if (template) |
4094 | context = DECL_CONTEXT (template); | |
5566b478 | 4095 | } |
c91a56d2 MS |
4096 | else if (TREE_CODE (d1) == TYPE_DECL && IS_AGGR_TYPE (TREE_TYPE (d1))) |
4097 | { | |
802dbc34 JM |
4098 | tree type = TREE_TYPE (d1); |
4099 | ||
4100 | /* If we are declaring a constructor, say A<T>::A<T>, we will get | |
4101 | an implicit typename for the second A. Deal with it. */ | |
4102 | if (TREE_CODE (type) == TYPENAME_TYPE && TREE_TYPE (type)) | |
4103 | type = TREE_TYPE (type); | |
4104 | ||
4105 | if (CLASSTYPE_TEMPLATE_INFO (type)) | |
f3400fe2 | 4106 | { |
802dbc34 | 4107 | template = CLASSTYPE_TI_TEMPLATE (type); |
f3400fe2 JM |
4108 | d1 = DECL_NAME (template); |
4109 | } | |
c91a56d2 | 4110 | } |
ed44da02 | 4111 | else if (TREE_CODE (d1) == ENUMERAL_TYPE |
2f939d94 | 4112 | || (TYPE_P (d1) && IS_AGGR_TYPE (d1))) |
5566b478 | 4113 | { |
ed44da02 | 4114 | template = TYPE_TI_TEMPLATE (d1); |
5566b478 MS |
4115 | d1 = DECL_NAME (template); |
4116 | } | |
93cdc044 | 4117 | else if (TREE_CODE (d1) == TEMPLATE_DECL |
17aec3eb | 4118 | && TREE_CODE (DECL_TEMPLATE_RESULT (d1)) == TYPE_DECL) |
93cdc044 JM |
4119 | { |
4120 | template = d1; | |
4121 | d1 = DECL_NAME (template); | |
4122 | context = DECL_CONTEXT (template); | |
4123 | } | |
8d08fdba | 4124 | |
8d08fdba | 4125 | /* With something like `template <class T> class X class X { ... };' |
f181d4ae MM |
4126 | we could end up with D1 having nothing but an IDENTIFIER_VALUE. |
4127 | We don't want to do that, but we have to deal with the situation, | |
4128 | so let's give them some syntax errors to chew on instead of a | |
1bc0793e | 4129 | crash. Alternatively D1 might not be a template type at all. */ |
8d08fdba | 4130 | if (! template) |
f3400fe2 | 4131 | { |
c2ea3a40 | 4132 | if (complain & tf_error) |
33bd39a2 | 4133 | error ("`%T' is not a template", d1); |
fd295cb2 | 4134 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node); |
f3400fe2 | 4135 | } |
2c73f9f5 | 4136 | |
a87b4257 NS |
4137 | if (TREE_CODE (template) != TEMPLATE_DECL |
4138 | /* If we're called from the parser, make sure it's a user visible | |
4139 | template. */ | |
4140 | || ((!arglist || TREE_CODE (arglist) == TREE_LIST) | |
4141 | && !DECL_TEMPLATE_PARM_P (template) | |
4142 | && !PRIMARY_TEMPLATE_P (template))) | |
8d08fdba | 4143 | { |
c2ea3a40 | 4144 | if (complain & tf_error) |
f9c244b8 | 4145 | { |
33bd39a2 | 4146 | error ("non-template type `%T' used as a template", d1); |
f9c244b8 NS |
4147 | if (in_decl) |
4148 | cp_error_at ("for template declaration `%D'", in_decl); | |
4149 | } | |
fd295cb2 | 4150 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node); |
8d08fdba | 4151 | } |
8d08fdba | 4152 | |
73b0fce8 KL |
4153 | if (DECL_TEMPLATE_TEMPLATE_PARM_P (template)) |
4154 | { | |
4155 | /* Create a new TEMPLATE_DECL and TEMPLATE_TEMPLATE_PARM node to store | |
4156 | template arguments */ | |
4157 | ||
1899c3a4 | 4158 | tree parm; |
73b0fce8 KL |
4159 | tree arglist2; |
4160 | ||
73b0fce8 KL |
4161 | parmlist = DECL_INNERMOST_TEMPLATE_PARMS (template); |
4162 | ||
4f96ff63 KL |
4163 | /* Consider an example where a template template parameter declared as |
4164 | ||
4165 | template <class T, class U = std::allocator<T> > class TT | |
4166 | ||
4167 | The template parameter level of T and U are one level larger than | |
4168 | of TT. To proper process the default argument of U, say when an | |
4169 | instantiation `TT<int>' is seen, we need to build the full | |
342cea95 KL |
4170 | arguments containing {int} as the innermost level. Outer levels, |
4171 | available when not appearing as default template argument, can be | |
4172 | obtained from `current_template_args ()'. | |
4f96ff63 | 4173 | |
342cea95 KL |
4174 | Suppose that TT is later substituted with std::vector. The above |
4175 | instantiation is `TT<int, std::allocator<T> >' with TT at | |
4176 | level 1, and T at level 2, while the template arguments at level 1 | |
4177 | becomes {std::vector} and the inner level 2 is {int}. */ | |
4178 | ||
4179 | if (current_template_parms) | |
4f96ff63 KL |
4180 | arglist = add_to_template_args (current_template_args (), arglist); |
4181 | ||
f9c244b8 NS |
4182 | arglist2 = coerce_template_parms (parmlist, arglist, template, |
4183 | complain, /*require_all_args=*/1); | |
3e4a3562 | 4184 | if (arglist2 == error_mark_node |
544aef8c | 4185 | || (!uses_template_parms (arglist2) |
3e4a3562 | 4186 | && check_instantiated_args (template, arglist2, complain))) |
fd295cb2 | 4187 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node); |
73b0fce8 | 4188 | |
dac65501 | 4189 | parm = bind_template_template_parm (TREE_TYPE (template), arglist2); |
fd295cb2 | 4190 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, parm); |
73b0fce8 | 4191 | } |
36a117a5 | 4192 | else |
8d08fdba | 4193 | { |
36a117a5 | 4194 | tree template_type = TREE_TYPE (template); |
7ac7b28f | 4195 | tree gen_tmpl; |
36a117a5 MM |
4196 | tree type_decl; |
4197 | tree found = NULL_TREE; | |
414ea4aa | 4198 | tree *tp; |
36a117a5 MM |
4199 | int arg_depth; |
4200 | int parm_depth; | |
dbfe2124 | 4201 | int is_partial_instantiation; |
830bfa74 | 4202 | |
7ac7b28f MM |
4203 | gen_tmpl = most_general_template (template); |
4204 | parmlist = DECL_TEMPLATE_PARMS (gen_tmpl); | |
36a117a5 MM |
4205 | parm_depth = TMPL_PARMS_DEPTH (parmlist); |
4206 | arg_depth = TMPL_ARGS_DEPTH (arglist); | |
4207 | ||
4208 | if (arg_depth == 1 && parm_depth > 1) | |
4209 | { | |
39c01e4c | 4210 | /* We've been given an incomplete set of template arguments. |
36a117a5 MM |
4211 | For example, given: |
4212 | ||
4213 | template <class T> struct S1 { | |
4214 | template <class U> struct S2 {}; | |
4215 | template <class U> struct S2<U*> {}; | |
4216 | }; | |
4217 | ||
4218 | we will be called with an ARGLIST of `U*', but the | |
4219 | TEMPLATE will be `template <class T> template | |
4220 | <class U> struct S1<T>::S2'. We must fill in the missing | |
4221 | arguments. */ | |
7ac7b28f MM |
4222 | arglist |
4223 | = add_outermost_template_args (TYPE_TI_ARGS (TREE_TYPE (template)), | |
4224 | arglist); | |
36a117a5 MM |
4225 | arg_depth = TMPL_ARGS_DEPTH (arglist); |
4226 | } | |
5566b478 | 4227 | |
41f5d4b1 | 4228 | /* Now we should have enough arguments. */ |
36a117a5 MM |
4229 | my_friendly_assert (parm_depth == arg_depth, 0); |
4230 | ||
7ac7b28f MM |
4231 | /* From here on, we're only interested in the most general |
4232 | template. */ | |
4233 | template = gen_tmpl; | |
4234 | ||
36a117a5 MM |
4235 | /* Calculate the BOUND_ARGS. These will be the args that are |
4236 | actually tsubst'd into the definition to create the | |
4237 | instantiation. */ | |
4238 | if (parm_depth > 1) | |
830bfa74 MM |
4239 | { |
4240 | /* We have multiple levels of arguments to coerce, at once. */ | |
830bfa74 | 4241 | int i; |
e4a84209 | 4242 | int saved_depth = TMPL_ARGS_DEPTH (arglist); |
36a117a5 | 4243 | |
f31c0a32 | 4244 | tree bound_args = make_tree_vec (parm_depth); |
830bfa74 | 4245 | |
e4a84209 | 4246 | for (i = saved_depth, |
830bfa74 | 4247 | t = DECL_TEMPLATE_PARMS (template); |
e4a84209 | 4248 | i > 0 && t != NULL_TREE; |
830bfa74 | 4249 | --i, t = TREE_CHAIN (t)) |
e4a84209 MM |
4250 | { |
4251 | tree a = coerce_template_parms (TREE_VALUE (t), | |
f9c244b8 NS |
4252 | arglist, template, |
4253 | complain, /*require_all_args=*/1); | |
88e98cfe KL |
4254 | |
4255 | /* Don't process further if one of the levels fails. */ | |
4256 | if (a == error_mark_node) | |
4257 | { | |
4258 | /* Restore the ARGLIST to its full size. */ | |
4259 | TREE_VEC_LENGTH (arglist) = saved_depth; | |
4260 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node); | |
4261 | } | |
4262 | ||
e4a84209 MM |
4263 | SET_TMPL_ARGS_LEVEL (bound_args, i, a); |
4264 | ||
4265 | /* We temporarily reduce the length of the ARGLIST so | |
4266 | that coerce_template_parms will see only the arguments | |
4267 | corresponding to the template parameters it is | |
4268 | examining. */ | |
4269 | TREE_VEC_LENGTH (arglist)--; | |
4270 | } | |
4271 | ||
4272 | /* Restore the ARGLIST to its full size. */ | |
4273 | TREE_VEC_LENGTH (arglist) = saved_depth; | |
4274 | ||
36a117a5 | 4275 | arglist = bound_args; |
830bfa74 MM |
4276 | } |
4277 | else | |
36a117a5 MM |
4278 | arglist |
4279 | = coerce_template_parms (INNERMOST_TEMPLATE_PARMS (parmlist), | |
f9a7ae04 | 4280 | INNERMOST_TEMPLATE_ARGS (arglist), |
f9c244b8 NS |
4281 | template, |
4282 | complain, /*require_all_args=*/1); | |
36a117a5 | 4283 | |
3e4a3562 | 4284 | if (arglist == error_mark_node |
544aef8c | 4285 | || (!uses_template_parms (INNERMOST_TEMPLATE_ARGS (arglist)) |
3e4a3562 NS |
4286 | && check_instantiated_args (template, |
4287 | INNERMOST_TEMPLATE_ARGS (arglist), | |
4288 | complain))) | |
36a117a5 | 4289 | /* We were unable to bind the arguments. */ |
fd295cb2 | 4290 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node); |
5566b478 | 4291 | |
36a117a5 MM |
4292 | /* In the scope of a template class, explicit references to the |
4293 | template class refer to the type of the template, not any | |
4294 | instantiation of it. For example, in: | |
4295 | ||
4296 | template <class T> class C { void f(C<T>); } | |
4297 | ||
4298 | the `C<T>' is just the same as `C'. Outside of the | |
4299 | class, however, such a reference is an instantiation. */ | |
ed44da02 | 4300 | if (comp_template_args (TYPE_TI_ARGS (template_type), |
36a117a5 MM |
4301 | arglist)) |
4302 | { | |
4303 | found = template_type; | |
4304 | ||
4305 | if (!entering_scope && PRIMARY_TEMPLATE_P (template)) | |
5566b478 | 4306 | { |
36a117a5 MM |
4307 | tree ctx; |
4308 | ||
4309 | /* Note that we use DECL_CONTEXT, rather than | |
4310 | CP_DECL_CONTEXT, so that the termination test is | |
dc957d14 | 4311 | always just `ctx'. We're not interested in namespace |
36a117a5 MM |
4312 | scopes. */ |
4313 | for (ctx = current_class_type; | |
4314 | ctx; | |
2f939d94 | 4315 | ctx = (TYPE_P (ctx)) ? TYPE_CONTEXT (ctx) : DECL_CONTEXT (ctx)) |
3bfdc719 | 4316 | if (same_type_p (ctx, template_type)) |
36a117a5 MM |
4317 | break; |
4318 | ||
4319 | if (!ctx) | |
4320 | /* We're not in the scope of the class, so the | |
4321 | TEMPLATE_TYPE is not the type we want after | |
4322 | all. */ | |
4323 | found = NULL_TREE; | |
5566b478 MS |
4324 | } |
4325 | } | |
36a117a5 | 4326 | if (found) |
fd295cb2 | 4327 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, found); |
414ea4aa MM |
4328 | |
4329 | for (tp = &DECL_TEMPLATE_INSTANTIATIONS (template); | |
4330 | *tp; | |
4331 | tp = &TREE_CHAIN (*tp)) | |
4332 | if (comp_template_args (TREE_PURPOSE (*tp), arglist)) | |
4333 | { | |
4334 | found = *tp; | |
7e7d9517 MM |
4335 | |
4336 | /* Use the move-to-front heuristic to speed up future | |
4337 | searches. */ | |
414ea4aa MM |
4338 | *tp = TREE_CHAIN (*tp); |
4339 | TREE_CHAIN (found) | |
4340 | = DECL_TEMPLATE_INSTANTIATIONS (template); | |
4341 | DECL_TEMPLATE_INSTANTIATIONS (template) = found; | |
7e7d9517 | 4342 | |
fd295cb2 | 4343 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, TREE_VALUE (found)); |
414ea4aa | 4344 | } |
5566b478 | 4345 | |
dbfe2124 | 4346 | /* This type is a "partial instantiation" if any of the template |
ab097535 | 4347 | arguments still involve template parameters. Note that we set |
486e4077 MM |
4348 | IS_PARTIAL_INSTANTIATION for partial specializations as |
4349 | well. */ | |
dbfe2124 MM |
4350 | is_partial_instantiation = uses_template_parms (arglist); |
4351 | ||
3ebc5c52 MM |
4352 | if (!is_partial_instantiation |
4353 | && !PRIMARY_TEMPLATE_P (template) | |
4354 | && TREE_CODE (CP_DECL_CONTEXT (template)) == NAMESPACE_DECL) | |
4355 | { | |
3ebc5c52 MM |
4356 | found = xref_tag_from_type (TREE_TYPE (template), |
4357 | DECL_NAME (template), | |
4358 | /*globalize=*/1); | |
fd295cb2 | 4359 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, found); |
3ebc5c52 | 4360 | } |
3ebc5c52 | 4361 | |
95ee998c | 4362 | context = tsubst (DECL_CONTEXT (template), arglist, |
c2ea3a40 | 4363 | complain, in_decl); |
95ee998c MM |
4364 | if (!context) |
4365 | context = global_namespace; | |
4366 | ||
36a117a5 | 4367 | /* Create the type. */ |
ed44da02 MM |
4368 | if (TREE_CODE (template_type) == ENUMERAL_TYPE) |
4369 | { | |
dbfe2124 | 4370 | if (!is_partial_instantiation) |
92777ce4 NS |
4371 | { |
4372 | set_current_access_from_decl (TYPE_NAME (template_type)); | |
4373 | t = start_enum (TYPE_IDENTIFIER (template_type)); | |
4374 | } | |
ed44da02 | 4375 | else |
dbfe2124 | 4376 | /* We don't want to call start_enum for this type, since |
ed44da02 MM |
4377 | the values for the enumeration constants may involve |
4378 | template parameters. And, no one should be interested | |
4379 | in the enumeration constants for such a type. */ | |
4380 | t = make_node (ENUMERAL_TYPE); | |
4381 | } | |
4382 | else | |
4383 | { | |
33848bb0 | 4384 | t = make_aggr_type (TREE_CODE (template_type)); |
ed44da02 MM |
4385 | CLASSTYPE_DECLARED_CLASS (t) |
4386 | = CLASSTYPE_DECLARED_CLASS (template_type); | |
4387 | CLASSTYPE_GOT_SEMICOLON (t) = 1; | |
4388 | SET_CLASSTYPE_IMPLICIT_INSTANTIATION (t); | |
f668f160 | 4389 | TYPE_FOR_JAVA (t) = TYPE_FOR_JAVA (template_type); |
ae673f14 JM |
4390 | |
4391 | /* A local class. Make sure the decl gets registered properly. */ | |
4392 | if (context == current_function_decl) | |
4393 | pushtag (DECL_NAME (template), t, 0); | |
ed44da02 MM |
4394 | } |
4395 | ||
ae673f14 JM |
4396 | /* If we called start_enum or pushtag above, this information |
4397 | will already be set up. */ | |
ed44da02 MM |
4398 | if (!TYPE_NAME (t)) |
4399 | { | |
4400 | TYPE_CONTEXT (t) = FROB_CONTEXT (context); | |
36a117a5 | 4401 | |
9188c363 | 4402 | type_decl = create_implicit_typedef (DECL_NAME (template), t); |
ed44da02 | 4403 | DECL_CONTEXT (type_decl) = TYPE_CONTEXT (t); |
9188c363 | 4404 | TYPE_STUB_DECL (t) = type_decl; |
3e72ec9a GDR |
4405 | DECL_SOURCE_LOCATION (type_decl) |
4406 | = DECL_SOURCE_LOCATION (TYPE_STUB_DECL (template_type)); | |
ed44da02 MM |
4407 | } |
4408 | else | |
4409 | type_decl = TYPE_NAME (t); | |
36a117a5 | 4410 | |
cab7a9a3 KL |
4411 | TREE_PRIVATE (type_decl) |
4412 | = TREE_PRIVATE (TYPE_STUB_DECL (template_type)); | |
4413 | TREE_PROTECTED (type_decl) | |
4414 | = TREE_PROTECTED (TYPE_STUB_DECL (template_type)); | |
4415 | ||
9fbf56f7 MM |
4416 | /* Set up the template information. We have to figure out which |
4417 | template is the immediate parent if this is a full | |
4418 | instantiation. */ | |
4419 | if (parm_depth == 1 || is_partial_instantiation | |
4420 | || !PRIMARY_TEMPLATE_P (template)) | |
4421 | /* This case is easy; there are no member templates involved. */ | |
4422 | found = template; | |
4423 | else | |
4424 | { | |
ab097535 NS |
4425 | /* This is a full instantiation of a member template. Look |
4426 | for a partial instantiation of which this is an instance. */ | |
9fbf56f7 MM |
4427 | |
4428 | for (found = DECL_TEMPLATE_INSTANTIATIONS (template); | |
4429 | found; found = TREE_CHAIN (found)) | |
4430 | { | |
4431 | int success; | |
4432 | tree tmpl = CLASSTYPE_TI_TEMPLATE (TREE_VALUE (found)); | |
4433 | ||
4434 | /* We only want partial instantiations, here, not | |
4435 | specializations or full instantiations. */ | |
370af2d5 | 4436 | if (CLASSTYPE_TEMPLATE_SPECIALIZATION (TREE_VALUE (found)) |
9fbf56f7 MM |
4437 | || !uses_template_parms (TREE_VALUE (found))) |
4438 | continue; | |
4439 | ||
4440 | /* Temporarily reduce by one the number of levels in the | |
4441 | ARGLIST and in FOUND so as to avoid comparing the | |
4442 | last set of arguments. */ | |
4443 | TREE_VEC_LENGTH (arglist)--; | |
4444 | TREE_VEC_LENGTH (TREE_PURPOSE (found)) --; | |
4445 | ||
4446 | /* See if the arguments match. If they do, then TMPL is | |
4447 | the partial instantiation we want. */ | |
4448 | success = comp_template_args (TREE_PURPOSE (found), arglist); | |
4449 | ||
4450 | /* Restore the argument vectors to their full size. */ | |
4451 | TREE_VEC_LENGTH (arglist)++; | |
4452 | TREE_VEC_LENGTH (TREE_PURPOSE (found))++; | |
4453 | ||
4454 | if (success) | |
4455 | { | |
4456 | found = tmpl; | |
4457 | break; | |
4458 | } | |
4459 | } | |
4460 | ||
4461 | if (!found) | |
ab097535 NS |
4462 | { |
4463 | /* There was no partial instantiation. This happens | |
4464 | where C<T> is a member template of A<T> and it's used | |
4465 | in something like | |
4466 | ||
4467 | template <typename T> struct B { A<T>::C<int> m; }; | |
4468 | B<float>; | |
4469 | ||
4470 | Create the partial instantiation. | |
4471 | */ | |
4472 | TREE_VEC_LENGTH (arglist)--; | |
c2ea3a40 | 4473 | found = tsubst (template, arglist, complain, NULL_TREE); |
ab097535 | 4474 | TREE_VEC_LENGTH (arglist)++; |
ab097535 | 4475 | } |
9fbf56f7 MM |
4476 | } |
4477 | ||
ab097535 | 4478 | SET_TYPE_TEMPLATE_INFO (t, tree_cons (found, arglist, NULL_TREE)); |
dbfe2124 MM |
4479 | DECL_TEMPLATE_INSTANTIATIONS (template) |
4480 | = tree_cons (arglist, t, | |
4481 | DECL_TEMPLATE_INSTANTIATIONS (template)); | |
4482 | ||
4483 | if (TREE_CODE (t) == ENUMERAL_TYPE | |
4484 | && !is_partial_instantiation) | |
61a127b3 MM |
4485 | /* Now that the type has been registered on the instantiations |
4486 | list, we set up the enumerators. Because the enumeration | |
4487 | constants may involve the enumeration type itself, we make | |
4488 | sure to register the type first, and then create the | |
4489 | constants. That way, doing tsubst_expr for the enumeration | |
4490 | constants won't result in recursive calls here; we'll find | |
4491 | the instantiation and exit above. */ | |
4492 | tsubst_enum (template_type, t, arglist); | |
dbfe2124 | 4493 | |
36a117a5 MM |
4494 | /* Reset the name of the type, now that CLASSTYPE_TEMPLATE_INFO |
4495 | is set up. */ | |
ed44da02 MM |
4496 | if (TREE_CODE (t) != ENUMERAL_TYPE) |
4497 | DECL_NAME (type_decl) = classtype_mangled_name (t); | |
dbfe2124 | 4498 | if (!is_partial_instantiation) |
36a117a5 | 4499 | { |
50a6dbd7 JM |
4500 | /* For backwards compatibility; code that uses |
4501 | -fexternal-templates expects looking up a template to | |
4502 | instantiate it. I think DDD still relies on this. | |
4503 | (jason 8/20/1998) */ | |
ed44da02 MM |
4504 | if (TREE_CODE (t) != ENUMERAL_TYPE |
4505 | && flag_external_templates | |
36a117a5 MM |
4506 | && CLASSTYPE_INTERFACE_KNOWN (TREE_TYPE (template)) |
4507 | && ! CLASSTYPE_INTERFACE_ONLY (TREE_TYPE (template))) | |
4508 | add_pending_template (t); | |
4509 | } | |
4510 | else | |
077e7015 MM |
4511 | /* If the type makes use of template parameters, the |
4512 | code that generates debugging information will crash. */ | |
4513 | DECL_IGNORED_P (TYPE_STUB_DECL (t)) = 1; | |
8d08fdba | 4514 | |
fd295cb2 | 4515 | POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t); |
36a117a5 | 4516 | } |
fd295cb2 | 4517 | timevar_pop (TV_NAME_LOOKUP); |
8d08fdba MS |
4518 | } |
4519 | \f | |
8dfaeb63 | 4520 | struct pair_fn_data |
8d08fdba | 4521 | { |
8dfaeb63 MM |
4522 | tree_fn_t fn; |
4523 | void *data; | |
4f2c9d7e | 4524 | htab_t visited; |
8dfaeb63 MM |
4525 | }; |
4526 | ||
4527 | /* Called from for_each_template_parm via walk_tree. */ | |
581d38d0 | 4528 | |
8dfaeb63 MM |
4529 | static tree |
4530 | for_each_template_parm_r (tp, walk_subtrees, d) | |
4531 | tree *tp; | |
4532 | int *walk_subtrees; | |
4533 | void *d; | |
4534 | { | |
4535 | tree t = *tp; | |
4536 | struct pair_fn_data *pfd = (struct pair_fn_data *) d; | |
4537 | tree_fn_t fn = pfd->fn; | |
4538 | void *data = pfd->data; | |
4f2c9d7e MM |
4539 | void **slot; |
4540 | ||
4541 | /* If we have already visited this tree, there's no need to walk | |
4542 | subtrees. Otherwise, add it to the visited table. */ | |
4543 | slot = htab_find_slot (pfd->visited, *tp, INSERT); | |
4544 | if (*slot) | |
4545 | { | |
4546 | *walk_subtrees = 0; | |
4547 | return NULL_TREE; | |
4548 | } | |
4549 | *slot = *tp; | |
4550 | ||
2f939d94 | 4551 | if (TYPE_P (t) |
4f2c9d7e | 4552 | && for_each_template_parm (TYPE_CONTEXT (t), fn, data, pfd->visited)) |
8dfaeb63 | 4553 | return error_mark_node; |
581d38d0 | 4554 | |
8d08fdba MS |
4555 | switch (TREE_CODE (t)) |
4556 | { | |
8d08fdba | 4557 | case RECORD_TYPE: |
9076e292 | 4558 | if (TYPE_PTRMEMFUNC_P (t)) |
8dfaeb63 | 4559 | break; |
ed44da02 MM |
4560 | /* Fall through. */ |
4561 | ||
8d08fdba | 4562 | case UNION_TYPE: |
ed44da02 | 4563 | case ENUMERAL_TYPE: |
8dfaeb63 MM |
4564 | if (!TYPE_TEMPLATE_INFO (t)) |
4565 | *walk_subtrees = 0; | |
4566 | else if (for_each_template_parm (TREE_VALUE (TYPE_TEMPLATE_INFO (t)), | |
4f2c9d7e | 4567 | fn, data, pfd->visited)) |
8dfaeb63 MM |
4568 | return error_mark_node; |
4569 | break; | |
4570 | ||
588c2d1c | 4571 | case METHOD_TYPE: |
8dfaeb63 MM |
4572 | /* Since we're not going to walk subtrees, we have to do this |
4573 | explicitly here. */ | |
4f2c9d7e MM |
4574 | if (for_each_template_parm (TYPE_METHOD_BASETYPE (t), fn, data, |
4575 | pfd->visited)) | |
8dfaeb63 | 4576 | return error_mark_node; |
4890c2f4 | 4577 | /* Fall through. */ |
588c2d1c MM |
4578 | |
4579 | case FUNCTION_TYPE: | |
8dfaeb63 | 4580 | /* Check the return type. */ |
4f2c9d7e | 4581 | if (for_each_template_parm (TREE_TYPE (t), fn, data, pfd->visited)) |
8dfaeb63 MM |
4582 | return error_mark_node; |
4583 | ||
588c2d1c MM |
4584 | /* Check the parameter types. Since default arguments are not |
4585 | instantiated until they are needed, the TYPE_ARG_TYPES may | |
4586 | contain expressions that involve template parameters. But, | |
4587 | no-one should be looking at them yet. And, once they're | |
4588 | instantiated, they don't contain template parameters, so | |
4589 | there's no point in looking at them then, either. */ | |
4590 | { | |
4591 | tree parm; | |
4592 | ||
4593 | for (parm = TYPE_ARG_TYPES (t); parm; parm = TREE_CHAIN (parm)) | |
4f2c9d7e MM |
4594 | if (for_each_template_parm (TREE_VALUE (parm), fn, data, |
4595 | pfd->visited)) | |
8dfaeb63 | 4596 | return error_mark_node; |
5566b478 | 4597 | |
8dfaeb63 MM |
4598 | /* Since we've already handled the TYPE_ARG_TYPES, we don't |
4599 | want walk_tree walking into them itself. */ | |
4600 | *walk_subtrees = 0; | |
4601 | } | |
4602 | break; | |
3ac3d9ea | 4603 | |
a723baf1 MM |
4604 | case TYPEOF_TYPE: |
4605 | if (for_each_template_parm (TYPE_FIELDS (t), fn, data, | |
4606 | pfd->visited)) | |
4607 | return error_mark_node; | |
4608 | break; | |
4609 | ||
8d08fdba | 4610 | case FUNCTION_DECL: |
5566b478 | 4611 | case VAR_DECL: |
5566b478 | 4612 | if (DECL_LANG_SPECIFIC (t) && DECL_TEMPLATE_INFO (t) |
4f2c9d7e MM |
4613 | && for_each_template_parm (DECL_TI_ARGS (t), fn, data, |
4614 | pfd->visited)) | |
8dfaeb63 MM |
4615 | return error_mark_node; |
4616 | /* Fall through. */ | |
4617 | ||
8d08fdba | 4618 | case PARM_DECL: |
a723baf1 MM |
4619 | case CONST_DECL: |
4620 | if (TREE_CODE (t) == CONST_DECL && DECL_TEMPLATE_PARM_P (t) | |
4621 | && for_each_template_parm (DECL_INITIAL (t), fn, data, | |
4622 | pfd->visited)) | |
4623 | return error_mark_node; | |
050367a3 | 4624 | if (DECL_CONTEXT (t) |
4f2c9d7e MM |
4625 | && for_each_template_parm (DECL_CONTEXT (t), fn, data, |
4626 | pfd->visited)) | |
8dfaeb63 MM |
4627 | return error_mark_node; |
4628 | break; | |
8d08fdba | 4629 | |
a1281f45 | 4630 | case BOUND_TEMPLATE_TEMPLATE_PARM: |
744fac59 | 4631 | /* Record template parameters such as `T' inside `TT<T>'. */ |
4f2c9d7e | 4632 | if (for_each_template_parm (TYPE_TI_ARGS (t), fn, data, pfd->visited)) |
8dfaeb63 MM |
4633 | return error_mark_node; |
4634 | /* Fall through. */ | |
4635 | ||
a1281f45 | 4636 | case TEMPLATE_TEMPLATE_PARM: |
744fac59 | 4637 | case TEMPLATE_TYPE_PARM: |
f84b4be9 | 4638 | case TEMPLATE_PARM_INDEX: |
8dfaeb63 MM |
4639 | if (fn && (*fn)(t, data)) |
4640 | return error_mark_node; | |
4641 | else if (!fn) | |
4642 | return error_mark_node; | |
4643 | break; | |
5156628f | 4644 | |
8dfaeb63 MM |
4645 | case TEMPLATE_DECL: |
4646 | /* A template template parameter is encountered */ | |
4647 | if (DECL_TEMPLATE_TEMPLATE_PARM_P (t) | |
4f2c9d7e | 4648 | && for_each_template_parm (TREE_TYPE (t), fn, data, pfd->visited)) |
8dfaeb63 | 4649 | return error_mark_node; |
db5ae43f | 4650 | |
8dfaeb63 MM |
4651 | /* Already substituted template template parameter */ |
4652 | *walk_subtrees = 0; | |
4653 | break; | |
b8865407 | 4654 | |
4699c561 | 4655 | case TYPENAME_TYPE: |
4f2c9d7e MM |
4656 | if (!fn |
4657 | || for_each_template_parm (TYPENAME_TYPE_FULLNAME (t), fn, | |
4658 | data, pfd->visited)) | |
8dfaeb63 MM |
4659 | return error_mark_node; |
4660 | break; | |
4699c561 | 4661 | |
8dfaeb63 MM |
4662 | case CONSTRUCTOR: |
4663 | if (TREE_TYPE (t) && TYPE_PTRMEMFUNC_P (TREE_TYPE (t)) | |
4664 | && for_each_template_parm (TYPE_PTRMEMFUNC_FN_TYPE | |
4f2c9d7e MM |
4665 | (TREE_TYPE (t)), fn, data, |
4666 | pfd->visited)) | |
8dfaeb63 MM |
4667 | return error_mark_node; |
4668 | break; | |
4669 | ||
b8865407 MM |
4670 | case INDIRECT_REF: |
4671 | case COMPONENT_REF: | |
4699c561 | 4672 | /* If there's no type, then this thing must be some expression |
b8865407 | 4673 | involving template parameters. */ |
4699c561 | 4674 | if (!fn && !TREE_TYPE (t)) |
8dfaeb63 MM |
4675 | return error_mark_node; |
4676 | break; | |
b8865407 | 4677 | |
42976354 BK |
4678 | case MODOP_EXPR: |
4679 | case CAST_EXPR: | |
4680 | case REINTERPRET_CAST_EXPR: | |
4681 | case CONST_CAST_EXPR: | |
4682 | case STATIC_CAST_EXPR: | |
4683 | case DYNAMIC_CAST_EXPR: | |
42976354 BK |
4684 | case ARROW_EXPR: |
4685 | case DOTSTAR_EXPR: | |
4686 | case TYPEID_EXPR: | |
b8865407 | 4687 | case LOOKUP_EXPR: |
40242ccf | 4688 | case PSEUDO_DTOR_EXPR: |
b8865407 | 4689 | if (!fn) |
8dfaeb63 MM |
4690 | return error_mark_node; |
4691 | break; | |
abff8e06 | 4692 | |
bd9bb3d2 MM |
4693 | case BASELINK: |
4694 | /* If we do not handle this case specially, we end up walking | |
4695 | the BINFO hierarchy, which is circular, and therefore | |
4696 | confuses walk_tree. */ | |
4697 | *walk_subtrees = 0; | |
4f2c9d7e MM |
4698 | if (for_each_template_parm (BASELINK_FUNCTIONS (*tp), fn, data, |
4699 | pfd->visited)) | |
bd9bb3d2 MM |
4700 | return error_mark_node; |
4701 | break; | |
4702 | ||
8d08fdba | 4703 | default: |
8dfaeb63 | 4704 | break; |
8d08fdba | 4705 | } |
8dfaeb63 MM |
4706 | |
4707 | /* We didn't find any template parameters we liked. */ | |
4708 | return NULL_TREE; | |
4709 | } | |
4710 | ||
a1281f45 KL |
4711 | /* For each TEMPLATE_TYPE_PARM, TEMPLATE_TEMPLATE_PARM, |
4712 | BOUND_TEMPLATE_TEMPLATE_PARM or TEMPLATE_PARM_INDEX in T, | |
4713 | call FN with the parameter and the DATA. | |
838dfd8a | 4714 | If FN returns nonzero, the iteration is terminated, and |
8dfaeb63 | 4715 | for_each_template_parm returns 1. Otherwise, the iteration |
838dfd8a | 4716 | continues. If FN never returns a nonzero value, the value |
8dfaeb63 MM |
4717 | returned by for_each_template_parm is 0. If FN is NULL, it is |
4718 | considered to be the function which always returns 1. */ | |
4719 | ||
4720 | static int | |
4f2c9d7e | 4721 | for_each_template_parm (t, fn, data, visited) |
8dfaeb63 MM |
4722 | tree t; |
4723 | tree_fn_t fn; | |
4724 | void* data; | |
4f2c9d7e | 4725 | htab_t visited; |
8dfaeb63 MM |
4726 | { |
4727 | struct pair_fn_data pfd; | |
ad2ae3b2 | 4728 | int result; |
8dfaeb63 MM |
4729 | |
4730 | /* Set up. */ | |
4731 | pfd.fn = fn; | |
4732 | pfd.data = data; | |
4733 | ||
4890c2f4 MM |
4734 | /* Walk the tree. (Conceptually, we would like to walk without |
4735 | duplicates, but for_each_template_parm_r recursively calls | |
4736 | for_each_template_parm, so we would need to reorganize a fair | |
4f2c9d7e MM |
4737 | bit to use walk_tree_without_duplicates, so we keep our own |
4738 | visited list.) */ | |
4739 | if (visited) | |
4740 | pfd.visited = visited; | |
4741 | else | |
4742 | pfd.visited = htab_create (37, htab_hash_pointer, htab_eq_pointer, | |
4743 | NULL); | |
ad2ae3b2 MM |
4744 | result = walk_tree (&t, |
4745 | for_each_template_parm_r, | |
4746 | &pfd, | |
4747 | NULL) != NULL_TREE; | |
4748 | ||
4749 | /* Clean up. */ | |
4750 | if (!visited) | |
4751 | htab_delete (pfd.visited); | |
4752 | ||
4753 | return result; | |
8d08fdba MS |
4754 | } |
4755 | ||
050367a3 MM |
4756 | int |
4757 | uses_template_parms (t) | |
4758 | tree t; | |
4759 | { | |
4f2c9d7e | 4760 | return for_each_template_parm (t, 0, 0, NULL); |
050367a3 MM |
4761 | } |
4762 | ||
27fafc8d | 4763 | static int tinst_depth; |
e9f32eb5 | 4764 | extern int max_tinst_depth; |
5566b478 | 4765 | #ifdef GATHER_STATISTICS |
27fafc8d | 4766 | int depth_reached; |
5566b478 | 4767 | #endif |
8dfaeb63 MM |
4768 | static int tinst_level_tick; |
4769 | static int last_template_error_tick; | |
8d08fdba | 4770 | |
3ae18eaf JM |
4771 | /* We're starting to instantiate D; record the template instantiation context |
4772 | for diagnostics and to restore it later. */ | |
4773 | ||
742a37d5 | 4774 | int |
5566b478 MS |
4775 | push_tinst_level (d) |
4776 | tree d; | |
8d08fdba | 4777 | { |
3ae18eaf | 4778 | tree new; |
8d08fdba | 4779 | |
7215f9a0 MS |
4780 | if (tinst_depth >= max_tinst_depth) |
4781 | { | |
8adf5b5e JM |
4782 | /* If the instantiation in question still has unbound template parms, |
4783 | we don't really care if we can't instantiate it, so just return. | |
4784 | This happens with base instantiation for implicit `typename'. */ | |
4785 | if (uses_template_parms (d)) | |
4786 | return 0; | |
4787 | ||
1139b3d8 | 4788 | last_template_error_tick = tinst_level_tick; |
33bd39a2 | 4789 | error ("template instantiation depth exceeds maximum of %d (use -ftemplate-depth-NN to increase the maximum) instantiating `%D'", |
b4f4233d | 4790 | max_tinst_depth, d); |
5566b478 | 4791 | |
cb753e49 | 4792 | print_instantiation_context (); |
5566b478 | 4793 | |
7215f9a0 MS |
4794 | return 0; |
4795 | } | |
4796 | ||
d479d37f | 4797 | new = build_expr_wfl (d, input_filename, input_line, 0); |
3ae18eaf | 4798 | TREE_CHAIN (new) = current_tinst_level; |
8d08fdba | 4799 | current_tinst_level = new; |
5566b478 | 4800 | |
7215f9a0 | 4801 | ++tinst_depth; |
5566b478 MS |
4802 | #ifdef GATHER_STATISTICS |
4803 | if (tinst_depth > depth_reached) | |
4804 | depth_reached = tinst_depth; | |
4805 | #endif | |
4806 | ||
27fafc8d | 4807 | ++tinst_level_tick; |
7215f9a0 | 4808 | return 1; |
8d08fdba MS |
4809 | } |
4810 | ||
3ae18eaf JM |
4811 | /* We're done instantiating this template; return to the instantiation |
4812 | context. */ | |
4813 | ||
8d08fdba MS |
4814 | void |
4815 | pop_tinst_level () | |
4816 | { | |
3ae18eaf | 4817 | tree old = current_tinst_level; |
8d08fdba | 4818 | |
ae58fa02 MM |
4819 | /* Restore the filename and line number stashed away when we started |
4820 | this instantiation. */ | |
d479d37f | 4821 | input_line = TINST_LINE (old); |
3ae18eaf | 4822 | input_filename = TINST_FILE (old); |
5f2c99c4 | 4823 | extract_interface_info (); |
ae58fa02 | 4824 | |
3ae18eaf | 4825 | current_tinst_level = TREE_CHAIN (old); |
7215f9a0 | 4826 | --tinst_depth; |
27fafc8d | 4827 | ++tinst_level_tick; |
8d08fdba MS |
4828 | } |
4829 | ||
3ae18eaf JM |
4830 | /* We're instantiating a deferred template; restore the template |
4831 | instantiation context in which the instantiation was requested, which | |
4832 | is one step out from LEVEL. */ | |
4833 | ||
4834 | static void | |
4835 | reopen_tinst_level (level) | |
4836 | tree level; | |
4837 | { | |
4838 | tree t; | |
4839 | ||
4840 | tinst_depth = 0; | |
4841 | for (t = level; t; t = TREE_CHAIN (t)) | |
4842 | ++tinst_depth; | |
4843 | ||
4844 | current_tinst_level = level; | |
4845 | pop_tinst_level (); | |
4846 | } | |
4847 | ||
4848 | /* Return the outermost template instantiation context, for use with | |
4849 | -falt-external-templates. */ | |
4850 | ||
4851 | tree | |
8d08fdba MS |
4852 | tinst_for_decl () |
4853 | { | |
3ae18eaf | 4854 | tree p = current_tinst_level; |
8d08fdba MS |
4855 | |
4856 | if (p) | |
3ae18eaf | 4857 | for (; TREE_CHAIN (p) ; p = TREE_CHAIN (p)) |
8d08fdba MS |
4858 | ; |
4859 | return p; | |
4860 | } | |
4861 | ||
f84b4be9 JM |
4862 | /* DECL is a friend FUNCTION_DECL or TEMPLATE_DECL. ARGS is the |
4863 | vector of template arguments, as for tsubst. | |
4864 | ||
dc957d14 | 4865 | Returns an appropriate tsubst'd friend declaration. */ |
f84b4be9 JM |
4866 | |
4867 | static tree | |
4868 | tsubst_friend_function (decl, args) | |
4869 | tree decl; | |
4870 | tree args; | |
4871 | { | |
4872 | tree new_friend; | |
82a98427 | 4873 | location_t saved_loc = input_location; |
27fafc8d | 4874 | |
82a98427 | 4875 | input_location = DECL_SOURCE_LOCATION (decl); |
27fafc8d | 4876 | |
f84b4be9 JM |
4877 | if (TREE_CODE (decl) == FUNCTION_DECL |
4878 | && DECL_TEMPLATE_INSTANTIATION (decl) | |
4879 | && TREE_CODE (DECL_TI_TEMPLATE (decl)) != TEMPLATE_DECL) | |
4880 | /* This was a friend declared with an explicit template | |
4881 | argument list, e.g.: | |
4882 | ||
4883 | friend void f<>(T); | |
4884 | ||
4885 | to indicate that f was a template instantiation, not a new | |
4886 | function declaration. Now, we have to figure out what | |
4887 | instantiation of what template. */ | |
4888 | { | |
76e57b45 | 4889 | tree template_id, arglist, fns; |
f84b4be9 JM |
4890 | tree new_args; |
4891 | tree tmpl; | |
ed2fa432 | 4892 | tree ns = decl_namespace_context (TYPE_MAIN_DECL (current_class_type)); |
76e57b45 NS |
4893 | |
4894 | /* Friend functions are looked up in the containing namespace scope. | |
4895 | We must enter that scope, to avoid finding member functions of the | |
4896 | current cless with same name. */ | |
4897 | push_nested_namespace (ns); | |
4898 | fns = tsubst_expr (DECL_TI_TEMPLATE (decl), args, | |
c2ea3a40 | 4899 | tf_error | tf_warning, NULL_TREE); |
76e57b45 NS |
4900 | pop_nested_namespace (ns); |
4901 | arglist = tsubst (DECL_TI_ARGS (decl), args, | |
c2ea3a40 | 4902 | tf_error | tf_warning, NULL_TREE); |
76e57b45 NS |
4903 | template_id = lookup_template_function (fns, arglist); |
4904 | ||
c2ea3a40 | 4905 | new_friend = tsubst (decl, args, tf_error | tf_warning, NULL_TREE); |
36a117a5 MM |
4906 | tmpl = determine_specialization (template_id, new_friend, |
4907 | &new_args, | |
bf8f3f93 | 4908 | /*need_member_template=*/0); |
3e4a3562 | 4909 | new_friend = instantiate_template (tmpl, new_args, tf_error); |
27fafc8d | 4910 | goto done; |
f84b4be9 | 4911 | } |
36a117a5 | 4912 | |
c2ea3a40 | 4913 | new_friend = tsubst (decl, args, tf_error | tf_warning, NULL_TREE); |
f84b4be9 | 4914 | |
36a117a5 | 4915 | /* The NEW_FRIEND will look like an instantiation, to the |
f84b4be9 JM |
4916 | compiler, but is not an instantiation from the point of view of |
4917 | the language. For example, we might have had: | |
4918 | ||
4919 | template <class T> struct S { | |
4920 | template <class U> friend void f(T, U); | |
4921 | }; | |
4922 | ||
4923 | Then, in S<int>, template <class U> void f(int, U) is not an | |
4924 | instantiation of anything. */ | |
4925 | DECL_USE_TEMPLATE (new_friend) = 0; | |
4926 | if (TREE_CODE (decl) == TEMPLATE_DECL) | |
655dc6ee JM |
4927 | { |
4928 | DECL_USE_TEMPLATE (DECL_TEMPLATE_RESULT (new_friend)) = 0; | |
4929 | DECL_SAVED_TREE (DECL_TEMPLATE_RESULT (new_friend)) | |
4930 | = DECL_SAVED_TREE (DECL_TEMPLATE_RESULT (decl)); | |
4931 | } | |
36a117a5 | 4932 | |
92643fea MM |
4933 | /* The mangled name for the NEW_FRIEND is incorrect. The function |
4934 | is not a template instantiation and should not be mangled like | |
4935 | one. Therefore, we forget the mangling here; we'll recompute it | |
4936 | later if we need it. */ | |
36a117a5 MM |
4937 | if (TREE_CODE (new_friend) != TEMPLATE_DECL) |
4938 | { | |
19e7881c | 4939 | SET_DECL_RTL (new_friend, NULL_RTX); |
92643fea | 4940 | SET_DECL_ASSEMBLER_NAME (new_friend, NULL_TREE); |
36a117a5 MM |
4941 | } |
4942 | ||
6eb3bb27 | 4943 | if (DECL_NAMESPACE_SCOPE_P (new_friend)) |
f84b4be9 | 4944 | { |
36a117a5 | 4945 | tree old_decl; |
fbf1c34b MM |
4946 | tree new_friend_template_info; |
4947 | tree new_friend_result_template_info; | |
92da7074 | 4948 | tree ns; |
fbf1c34b MM |
4949 | int new_friend_is_defn; |
4950 | ||
4951 | /* We must save some information from NEW_FRIEND before calling | |
4952 | duplicate decls since that function will free NEW_FRIEND if | |
4953 | possible. */ | |
4954 | new_friend_template_info = DECL_TEMPLATE_INFO (new_friend); | |
f84b4be9 | 4955 | if (TREE_CODE (new_friend) == TEMPLATE_DECL) |
fbf1c34b MM |
4956 | { |
4957 | /* This declaration is a `primary' template. */ | |
4958 | DECL_PRIMARY_TEMPLATE (new_friend) = new_friend; | |
4959 | ||
4960 | new_friend_is_defn | |
17aec3eb | 4961 | = DECL_INITIAL (DECL_TEMPLATE_RESULT (new_friend)) != NULL_TREE; |
fbf1c34b | 4962 | new_friend_result_template_info |
17aec3eb | 4963 | = DECL_TEMPLATE_INFO (DECL_TEMPLATE_RESULT (new_friend)); |
fbf1c34b MM |
4964 | } |
4965 | else | |
4966 | { | |
4967 | new_friend_is_defn = DECL_INITIAL (new_friend) != NULL_TREE; | |
4968 | new_friend_result_template_info = NULL_TREE; | |
4969 | } | |
36a117a5 | 4970 | |
1c227897 MM |
4971 | /* Inside pushdecl_namespace_level, we will push into the |
4972 | current namespace. However, the friend function should go | |
c6002625 | 4973 | into the namespace of the template. */ |
92da7074 ML |
4974 | ns = decl_namespace_context (new_friend); |
4975 | push_nested_namespace (ns); | |
36a117a5 | 4976 | old_decl = pushdecl_namespace_level (new_friend); |
92da7074 | 4977 | pop_nested_namespace (ns); |
36a117a5 MM |
4978 | |
4979 | if (old_decl != new_friend) | |
4980 | { | |
4981 | /* This new friend declaration matched an existing | |
4982 | declaration. For example, given: | |
4983 | ||
4984 | template <class T> void f(T); | |
4985 | template <class U> class C { | |
4986 | template <class T> friend void f(T) {} | |
4987 | }; | |
4988 | ||
4989 | the friend declaration actually provides the definition | |
4990 | of `f', once C has been instantiated for some type. So, | |
4991 | old_decl will be the out-of-class template declaration, | |
4992 | while new_friend is the in-class definition. | |
4993 | ||
4994 | But, if `f' was called before this point, the | |
4995 | instantiation of `f' will have DECL_TI_ARGS corresponding | |
4996 | to `T' but not to `U', references to which might appear | |
4997 | in the definition of `f'. Previously, the most general | |
4998 | template for an instantiation of `f' was the out-of-class | |
4999 | version; now it is the in-class version. Therefore, we | |
5000 | run through all specialization of `f', adding to their | |
5001 | DECL_TI_ARGS appropriately. In particular, they need a | |
5002 | new set of outer arguments, corresponding to the | |
5003 | arguments for this class instantiation. | |
5004 | ||
5005 | The same situation can arise with something like this: | |
5006 | ||
5007 | friend void f(int); | |
5008 | template <class T> class C { | |
5009 | friend void f(T) {} | |
5010 | }; | |
5011 | ||
5012 | when `C<int>' is instantiated. Now, `f(int)' is defined | |
5013 | in the class. */ | |
5014 | ||
fbf1c34b MM |
5015 | if (!new_friend_is_defn) |
5016 | /* On the other hand, if the in-class declaration does | |
5017 | *not* provide a definition, then we don't want to alter | |
5018 | existing definitions. We can just leave everything | |
5019 | alone. */ | |
36a117a5 | 5020 | ; |
fbf1c34b | 5021 | else |
36a117a5 | 5022 | { |
fbf1c34b MM |
5023 | /* Overwrite whatever template info was there before, if |
5024 | any, with the new template information pertaining to | |
5025 | the declaration. */ | |
5026 | DECL_TEMPLATE_INFO (old_decl) = new_friend_template_info; | |
5027 | ||
5028 | if (TREE_CODE (old_decl) != TEMPLATE_DECL) | |
5029 | /* duplicate_decls will take care of this case. */ | |
5030 | ; | |
5031 | else | |
36a117a5 | 5032 | { |
fbf1c34b MM |
5033 | tree t; |
5034 | tree new_friend_args; | |
5035 | ||
17aec3eb | 5036 | DECL_TEMPLATE_INFO (DECL_TEMPLATE_RESULT (old_decl)) |
fbf1c34b MM |
5037 | = new_friend_result_template_info; |
5038 | ||
5039 | new_friend_args = TI_ARGS (new_friend_template_info); | |
5040 | for (t = DECL_TEMPLATE_SPECIALIZATIONS (old_decl); | |
5041 | t != NULL_TREE; | |
5042 | t = TREE_CHAIN (t)) | |
5043 | { | |
5044 | tree spec = TREE_VALUE (t); | |
36a117a5 | 5045 | |
fbf1c34b MM |
5046 | DECL_TI_ARGS (spec) |
5047 | = add_outermost_template_args (new_friend_args, | |
5048 | DECL_TI_ARGS (spec)); | |
fbf1c34b MM |
5049 | } |
5050 | ||
5051 | /* Now, since specializations are always supposed to | |
5052 | hang off of the most general template, we must move | |
5053 | them. */ | |
5054 | t = most_general_template (old_decl); | |
5055 | if (t != old_decl) | |
5056 | { | |
5057 | DECL_TEMPLATE_SPECIALIZATIONS (t) | |
5058 | = chainon (DECL_TEMPLATE_SPECIALIZATIONS (t), | |
5059 | DECL_TEMPLATE_SPECIALIZATIONS (old_decl)); | |
5060 | DECL_TEMPLATE_SPECIALIZATIONS (old_decl) = NULL_TREE; | |
5061 | } | |
36a117a5 MM |
5062 | } |
5063 | } | |
5064 | ||
5065 | /* The information from NEW_FRIEND has been merged into OLD_DECL | |
5066 | by duplicate_decls. */ | |
5067 | new_friend = old_decl; | |
5068 | } | |
f84b4be9 | 5069 | } |
d0f062fb | 5070 | else if (COMPLETE_TYPE_P (DECL_CONTEXT (new_friend))) |
f84b4be9 JM |
5071 | { |
5072 | /* Check to see that the declaration is really present, and, | |
5073 | possibly obtain an improved declaration. */ | |
5074 | tree fn = check_classfn (DECL_CONTEXT (new_friend), | |
5075 | new_friend); | |
5076 | ||
5077 | if (fn) | |
5078 | new_friend = fn; | |
5079 | } | |
5080 | ||
27fafc8d | 5081 | done: |
82a98427 | 5082 | input_location = saved_loc; |
f84b4be9 JM |
5083 | return new_friend; |
5084 | } | |
5085 | ||
1aed5355 MM |
5086 | /* FRIEND_TMPL is a friend TEMPLATE_DECL. ARGS is the vector of |
5087 | template arguments, as for tsubst. | |
6757edfe | 5088 | |
dc957d14 | 5089 | Returns an appropriate tsubst'd friend type or error_mark_node on |
4b054b80 | 5090 | failure. */ |
6757edfe MM |
5091 | |
5092 | static tree | |
1aed5355 MM |
5093 | tsubst_friend_class (friend_tmpl, args) |
5094 | tree friend_tmpl; | |
6757edfe MM |
5095 | tree args; |
5096 | { | |
1aed5355 | 5097 | tree friend_type; |
25aab5d0 | 5098 | tree tmpl; |
3e0ec82f | 5099 | tree context; |
6757edfe | 5100 | |
3e0ec82f MM |
5101 | context = DECL_CONTEXT (friend_tmpl); |
5102 | ||
5103 | if (context) | |
77adef84 | 5104 | { |
3e0ec82f MM |
5105 | if (TREE_CODE (context) == NAMESPACE_DECL) |
5106 | push_nested_namespace (context); | |
5107 | else | |
14d22dd6 | 5108 | push_nested_class (tsubst (context, args, tf_none, NULL_TREE)); |
3e0ec82f | 5109 | } |
25aab5d0 | 5110 | |
3e0ec82f MM |
5111 | /* First, we look for a class template. */ |
5112 | tmpl = lookup_name (DECL_NAME (friend_tmpl), /*prefer_type=*/0); | |
25aab5d0 | 5113 | |
3e0ec82f MM |
5114 | /* But, if we don't find one, it might be because we're in a |
5115 | situation like this: | |
77adef84 | 5116 | |
3e0ec82f MM |
5117 | template <class T> |
5118 | struct S { | |
5119 | template <class U> | |
5120 | friend struct S; | |
5121 | }; | |
5122 | ||
5123 | Here, in the scope of (say) S<int>, `S' is bound to a TYPE_DECL | |
5124 | for `S<int>', not the TEMPLATE_DECL. */ | |
5125 | if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl)) | |
5126 | { | |
5127 | tmpl = lookup_name (DECL_NAME (friend_tmpl), /*prefer_type=*/1); | |
5128 | tmpl = maybe_get_template_decl_from_type_decl (tmpl); | |
25aab5d0 | 5129 | } |
6757edfe | 5130 | |
25aab5d0 | 5131 | if (tmpl && DECL_CLASS_TEMPLATE_P (tmpl)) |
6757edfe MM |
5132 | { |
5133 | /* The friend template has already been declared. Just | |
36a117a5 MM |
5134 | check to see that the declarations match, and install any new |
5135 | default parameters. We must tsubst the default parameters, | |
5136 | of course. We only need the innermost template parameters | |
5137 | because that is all that redeclare_class_template will look | |
5138 | at. */ | |
3e0ec82f MM |
5139 | if (TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (friend_tmpl)) |
5140 | > TMPL_ARGS_DEPTH (args)) | |
5141 | { | |
5142 | tree parms; | |
5143 | parms = tsubst_template_parms (DECL_TEMPLATE_PARMS (friend_tmpl), | |
5144 | args, tf_error | tf_warning); | |
5145 | redeclare_class_template (TREE_TYPE (tmpl), parms); | |
5146 | } | |
5147 | ||
6757edfe MM |
5148 | friend_type = TREE_TYPE (tmpl); |
5149 | } | |
5150 | else | |
5151 | { | |
5152 | /* The friend template has not already been declared. In this | |
5153 | case, the instantiation of the template class will cause the | |
5154 | injection of this template into the global scope. */ | |
c2ea3a40 | 5155 | tmpl = tsubst (friend_tmpl, args, tf_error | tf_warning, NULL_TREE); |
6757edfe MM |
5156 | |
5157 | /* The new TMPL is not an instantiation of anything, so we | |
5158 | forget its origins. We don't reset CLASSTYPE_TI_TEMPLATE for | |
5159 | the new type because that is supposed to be the corresponding | |
5160 | template decl, i.e., TMPL. */ | |
5161 | DECL_USE_TEMPLATE (tmpl) = 0; | |
5162 | DECL_TEMPLATE_INFO (tmpl) = NULL_TREE; | |
5163 | CLASSTYPE_USE_TEMPLATE (TREE_TYPE (tmpl)) = 0; | |
5164 | ||
5165 | /* Inject this template into the global scope. */ | |
5166 | friend_type = TREE_TYPE (pushdecl_top_level (tmpl)); | |
5167 | } | |
5168 | ||
3e0ec82f MM |
5169 | if (context) |
5170 | { | |
5171 | if (TREE_CODE (context) == NAMESPACE_DECL) | |
5172 | pop_nested_namespace (context); | |
5173 | else | |
5174 | pop_nested_class (); | |
5175 | } | |
5176 | ||
6757edfe MM |
5177 | return friend_type; |
5178 | } | |
f84b4be9 | 5179 | |
17f29637 KL |
5180 | /* Returns zero if TYPE cannot be completed later due to circularity. |
5181 | Otherwise returns one. */ | |
5182 | ||
d5372501 | 5183 | static int |
17f29637 KL |
5184 | can_complete_type_without_circularity (type) |
5185 | tree type; | |
5186 | { | |
5187 | if (type == NULL_TREE || type == error_mark_node) | |
5188 | return 0; | |
5189 | else if (COMPLETE_TYPE_P (type)) | |
5190 | return 1; | |
5191 | else if (TREE_CODE (type) == ARRAY_TYPE && TYPE_DOMAIN (type)) | |
5192 | return can_complete_type_without_circularity (TREE_TYPE (type)); | |
5193 | else if (CLASS_TYPE_P (type) && TYPE_BEING_DEFINED (TYPE_MAIN_VARIANT (type))) | |
5194 | return 0; | |
5195 | else | |
5196 | return 1; | |
5197 | } | |
5198 | ||
8d08fdba | 5199 | tree |
5566b478 MS |
5200 | instantiate_class_template (type) |
5201 | tree type; | |
8d08fdba | 5202 | { |
7088fca9 | 5203 | tree template, args, pattern, t, member; |
36a117a5 | 5204 | tree typedecl; |
dbbf88d1 NS |
5205 | tree pbinfo; |
5206 | ||
5566b478 | 5207 | if (type == error_mark_node) |
8d08fdba MS |
5208 | return error_mark_node; |
5209 | ||
ca099ac8 MM |
5210 | if (TYPE_BEING_DEFINED (type) |
5211 | || COMPLETE_TYPE_P (type) | |
5212 | || dependent_type_p (type)) | |
5566b478 MS |
5213 | return type; |
5214 | ||
6bdb985f | 5215 | /* Figure out which template is being instantiated. */ |
36a117a5 | 5216 | template = most_general_template (CLASSTYPE_TI_TEMPLATE (type)); |
5566b478 | 5217 | my_friendly_assert (TREE_CODE (template) == TEMPLATE_DECL, 279); |
73aad9b9 | 5218 | |
6bdb985f MM |
5219 | /* Figure out which arguments are being used to do the |
5220 | instantiation. */ | |
5221 | args = CLASSTYPE_TI_ARGS (type); | |
4c571114 MM |
5222 | |
5223 | /* Determine what specialization of the original template to | |
5224 | instantiate. */ | |
8fbc5ae7 MM |
5225 | t = most_specialized_class (template, args); |
5226 | if (t == error_mark_node) | |
73aad9b9 | 5227 | { |
8fbc5ae7 MM |
5228 | const char *str = "candidates are:"; |
5229 | error ("ambiguous class template instantiation for `%#T'", type); | |
5230 | for (t = DECL_TEMPLATE_SPECIALIZATIONS (template); t; | |
5231 | t = TREE_CHAIN (t)) | |
73aad9b9 | 5232 | { |
8fbc5ae7 MM |
5233 | if (get_class_bindings (TREE_VALUE (t), TREE_PURPOSE (t), |
5234 | args)) | |
73aad9b9 | 5235 | { |
8fbc5ae7 MM |
5236 | cp_error_at ("%s %+#T", str, TREE_TYPE (t)); |
5237 | str = " "; | |
73aad9b9 JM |
5238 | } |
5239 | } | |
8fbc5ae7 MM |
5240 | TYPE_BEING_DEFINED (type) = 1; |
5241 | return error_mark_node; | |
73aad9b9 | 5242 | } |
6bdb985f MM |
5243 | |
5244 | if (t) | |
73aad9b9 JM |
5245 | pattern = TREE_TYPE (t); |
5246 | else | |
5247 | pattern = TREE_TYPE (template); | |
5566b478 | 5248 | |
4c571114 MM |
5249 | /* If the template we're instantiating is incomplete, then clearly |
5250 | there's nothing we can do. */ | |
d0f062fb | 5251 | if (!COMPLETE_TYPE_P (pattern)) |
f31c0a32 | 5252 | return type; |
5566b478 | 5253 | |
4c571114 MM |
5254 | /* If we've recursively instantiated too many templates, stop. */ |
5255 | if (! push_tinst_level (type)) | |
f31c0a32 | 5256 | return type; |
4c571114 MM |
5257 | |
5258 | /* Now we're really doing the instantiation. Mark the type as in | |
5259 | the process of being defined. */ | |
5260 | TYPE_BEING_DEFINED (type) = 1; | |
5261 | ||
78757caa KL |
5262 | /* We may be in the middle of deferred access check. Disable |
5263 | it now. */ | |
5264 | push_deferring_access_checks (dk_no_deferred); | |
5265 | ||
4c571114 | 5266 | maybe_push_to_top_level (uses_template_parms (type)); |
4c571114 | 5267 | |
73aad9b9 | 5268 | if (t) |
36a117a5 | 5269 | { |
27631dae | 5270 | /* This TYPE is actually an instantiation of a partial |
36a117a5 MM |
5271 | specialization. We replace the innermost set of ARGS with |
5272 | the arguments appropriate for substitution. For example, | |
5273 | given: | |
5274 | ||
5275 | template <class T> struct S {}; | |
5276 | template <class T> struct S<T*> {}; | |
5277 | ||
5278 | and supposing that we are instantiating S<int*>, ARGS will | |
5279 | present be {int*} but we need {int}. */ | |
5280 | tree inner_args | |
5281 | = get_class_bindings (TREE_VALUE (t), TREE_PURPOSE (t), | |
5282 | args); | |
5283 | ||
5284 | /* If there were multiple levels in ARGS, replacing the | |
5285 | innermost level would alter CLASSTYPE_TI_ARGS, which we don't | |
5286 | want, so we make a copy first. */ | |
5287 | if (TMPL_ARGS_HAVE_MULTIPLE_LEVELS (args)) | |
5288 | { | |
5289 | args = copy_node (args); | |
5290 | SET_TMPL_ARGS_LEVEL (args, TMPL_ARGS_DEPTH (args), inner_args); | |
5291 | } | |
5292 | else | |
5293 | args = inner_args; | |
5294 | } | |
8d019cef | 5295 | |
5566b478 MS |
5296 | if (flag_external_templates) |
5297 | { | |
5298 | if (flag_alt_external_templates) | |
5299 | { | |
5300 | CLASSTYPE_INTERFACE_ONLY (type) = interface_only; | |
5301 | SET_CLASSTYPE_INTERFACE_UNKNOWN_X (type, interface_unknown); | |
5566b478 MS |
5302 | } |
5303 | else | |
5304 | { | |
5305 | CLASSTYPE_INTERFACE_ONLY (type) = CLASSTYPE_INTERFACE_ONLY (pattern); | |
5306 | SET_CLASSTYPE_INTERFACE_UNKNOWN_X | |
5307 | (type, CLASSTYPE_INTERFACE_UNKNOWN (pattern)); | |
5566b478 MS |
5308 | } |
5309 | } | |
5310 | else | |
8d08fdba | 5311 | { |
5566b478 | 5312 | SET_CLASSTYPE_INTERFACE_UNKNOWN (type); |
8d08fdba MS |
5313 | } |
5314 | ||
f7da6097 MS |
5315 | TYPE_HAS_CONSTRUCTOR (type) = TYPE_HAS_CONSTRUCTOR (pattern); |
5316 | TYPE_HAS_DESTRUCTOR (type) = TYPE_HAS_DESTRUCTOR (pattern); | |
f7da6097 MS |
5317 | TYPE_OVERLOADS_CALL_EXPR (type) = TYPE_OVERLOADS_CALL_EXPR (pattern); |
5318 | TYPE_OVERLOADS_ARRAY_REF (type) = TYPE_OVERLOADS_ARRAY_REF (pattern); | |
5319 | TYPE_OVERLOADS_ARROW (type) = TYPE_OVERLOADS_ARROW (pattern); | |
834c6dff MM |
5320 | TYPE_HAS_NEW_OPERATOR (type) = TYPE_HAS_NEW_OPERATOR (pattern); |
5321 | TYPE_HAS_ARRAY_NEW_OPERATOR (type) = TYPE_HAS_ARRAY_NEW_OPERATOR (pattern); | |
f7da6097 | 5322 | TYPE_GETS_DELETE (type) = TYPE_GETS_DELETE (pattern); |
f7da6097 MS |
5323 | TYPE_HAS_ASSIGN_REF (type) = TYPE_HAS_ASSIGN_REF (pattern); |
5324 | TYPE_HAS_CONST_ASSIGN_REF (type) = TYPE_HAS_CONST_ASSIGN_REF (pattern); | |
5325 | TYPE_HAS_ABSTRACT_ASSIGN_REF (type) = TYPE_HAS_ABSTRACT_ASSIGN_REF (pattern); | |
5326 | TYPE_HAS_INIT_REF (type) = TYPE_HAS_INIT_REF (pattern); | |
5327 | TYPE_HAS_CONST_INIT_REF (type) = TYPE_HAS_CONST_INIT_REF (pattern); | |
f7da6097 MS |
5328 | TYPE_HAS_DEFAULT_CONSTRUCTOR (type) = TYPE_HAS_DEFAULT_CONSTRUCTOR (pattern); |
5329 | TYPE_HAS_CONVERSION (type) = TYPE_HAS_CONVERSION (pattern); | |
4c6b7393 MM |
5330 | TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (type) |
5331 | = TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (pattern); | |
f7da6097 MS |
5332 | TYPE_USES_MULTIPLE_INHERITANCE (type) |
5333 | = TYPE_USES_MULTIPLE_INHERITANCE (pattern); | |
5334 | TYPE_USES_VIRTUAL_BASECLASSES (type) | |
5335 | = TYPE_USES_VIRTUAL_BASECLASSES (pattern); | |
5336 | TYPE_PACKED (type) = TYPE_PACKED (pattern); | |
5337 | TYPE_ALIGN (type) = TYPE_ALIGN (pattern); | |
11cf4d18 | 5338 | TYPE_USER_ALIGN (type) = TYPE_USER_ALIGN (pattern); |
eff71ab0 | 5339 | TYPE_FOR_JAVA (type) = TYPE_FOR_JAVA (pattern); /* For libjava's JArray<T> */ |
6bdb8141 JM |
5340 | if (ANON_AGGR_TYPE_P (pattern)) |
5341 | SET_ANON_AGGR_TYPE_P (type); | |
f7da6097 | 5342 | |
dbbf88d1 NS |
5343 | pbinfo = TYPE_BINFO (pattern); |
5344 | ||
5345 | if (BINFO_BASETYPES (pbinfo)) | |
3fd71a52 MM |
5346 | { |
5347 | tree base_list = NULL_TREE; | |
dbbf88d1 NS |
5348 | tree pbases = BINFO_BASETYPES (pbinfo); |
5349 | tree paccesses = BINFO_BASEACCESSES (pbinfo); | |
3fd71a52 | 5350 | int i; |
5566b478 | 5351 | |
3fd71a52 MM |
5352 | /* Substitute into each of the bases to determine the actual |
5353 | basetypes. */ | |
5354 | for (i = 0; i < TREE_VEC_LENGTH (pbases); ++i) | |
5355 | { | |
5356 | tree base; | |
5357 | tree access; | |
5358 | tree pbase; | |
5566b478 | 5359 | |
3fd71a52 | 5360 | pbase = TREE_VEC_ELT (pbases, i); |
dbbf88d1 | 5361 | access = TREE_VEC_ELT (paccesses, i); |
711734a9 | 5362 | |
dc957d14 | 5363 | /* Substitute to figure out the base class. */ |
c2ea3a40 | 5364 | base = tsubst (BINFO_TYPE (pbase), args, tf_error, NULL_TREE); |
3fd71a52 MM |
5365 | if (base == error_mark_node) |
5366 | continue; | |
dbbf88d1 | 5367 | |
3fd71a52 | 5368 | base_list = tree_cons (access, base, base_list); |
dbbf88d1 | 5369 | TREE_VIA_VIRTUAL (base_list) = TREE_VIA_VIRTUAL (pbase); |
3fd71a52 | 5370 | } |
dfbcd65a | 5371 | |
3fd71a52 MM |
5372 | /* The list is now in reverse order; correct that. */ |
5373 | base_list = nreverse (base_list); | |
5374 | ||
5375 | /* Now call xref_basetypes to set up all the base-class | |
5376 | information. */ | |
da15dae6 | 5377 | xref_basetypes (type, base_list); |
3fd71a52 | 5378 | } |
5566b478 | 5379 | |
b74a0560 MM |
5380 | /* Now that our base classes are set up, enter the scope of the |
5381 | class, so that name lookups into base classes, etc. will work | |
dc957d14 | 5382 | correctly. This is precisely analogous to what we do in |
b74a0560 MM |
5383 | begin_class_definition when defining an ordinary non-template |
5384 | class. */ | |
14d22dd6 | 5385 | pushclass (type, true); |
b74a0560 | 5386 | |
7088fca9 KL |
5387 | /* Now members are processed in the order of declaration. */ |
5388 | for (member = CLASSTYPE_DECL_LIST (pattern); member; member = TREE_CHAIN (member)) | |
8d08fdba | 5389 | { |
7088fca9 | 5390 | tree t = TREE_VALUE (member); |
5566b478 | 5391 | |
7088fca9 | 5392 | if (TREE_PURPOSE (member)) |
ed44da02 | 5393 | { |
7088fca9 KL |
5394 | if (TYPE_P (t)) |
5395 | { | |
5396 | /* Build new CLASSTYPE_TAGS. */ | |
8d08fdba | 5397 | |
7088fca9 KL |
5398 | tree tag = t; |
5399 | tree name = TYPE_IDENTIFIER (tag); | |
5400 | tree newtag; | |
ae58fa02 | 5401 | |
7088fca9 KL |
5402 | newtag = tsubst (tag, args, tf_error, NULL_TREE); |
5403 | my_friendly_assert (newtag != error_mark_node, 20010206); | |
5404 | if (TREE_CODE (newtag) != ENUMERAL_TYPE) | |
5405 | { | |
5406 | if (TYPE_LANG_SPECIFIC (tag) && CLASSTYPE_IS_TEMPLATE (tag)) | |
5407 | /* Unfortunately, lookup_template_class sets | |
5408 | CLASSTYPE_IMPLICIT_INSTANTIATION for a partial | |
5409 | instantiation (i.e., for the type of a member template | |
5410 | class nested within a template class.) This behavior is | |
5411 | required for maybe_process_partial_specialization to work | |
5412 | correctly, but is not accurate in this case; the TAG is not | |
5413 | an instantiation of anything. (The corresponding | |
5414 | TEMPLATE_DECL is an instantiation, but the TYPE is not.) */ | |
5415 | CLASSTYPE_USE_TEMPLATE (newtag) = 0; | |
5416 | ||
5417 | /* Now, we call pushtag to put this NEWTAG into the scope of | |
5418 | TYPE. We first set up the IDENTIFIER_TYPE_VALUE to avoid | |
5419 | pushtag calling push_template_decl. We don't have to do | |
5420 | this for enums because it will already have been done in | |
5421 | tsubst_enum. */ | |
5422 | if (name) | |
5423 | SET_IDENTIFIER_TYPE_VALUE (name, newtag); | |
5424 | pushtag (name, newtag, /*globalize=*/0); | |
5425 | } | |
5426 | } | |
5427 | else if (TREE_CODE (t) == FUNCTION_DECL | |
5428 | || DECL_FUNCTION_TEMPLATE_P (t)) | |
5429 | { | |
5430 | /* Build new TYPE_METHODS. */ | |
ae58fa02 | 5431 | |
7088fca9 KL |
5432 | tree r = tsubst (t, args, tf_error, NULL_TREE); |
5433 | set_current_access_from_decl (r); | |
5434 | grok_special_member_properties (r); | |
5435 | finish_member_declaration (r); | |
5436 | } | |
5437 | else | |
5438 | { | |
5439 | /* Build new TYPE_FIELDS. */ | |
fa8d6e85 | 5440 | |
7088fca9 KL |
5441 | if (TREE_CODE (t) != CONST_DECL) |
5442 | { | |
5443 | tree r; | |
fa8d6e85 | 5444 | |
d479d37f NS |
5445 | /* The the file and line for this declaration, to |
5446 | assist in error message reporting. Since we | |
5447 | called push_tinst_level above, we don't need to | |
5448 | restore these. */ | |
82a98427 | 5449 | input_location = DECL_SOURCE_LOCATION (t); |
fa8d6e85 | 5450 | |
7088fca9 KL |
5451 | r = tsubst (t, args, tf_error | tf_warning, NULL_TREE); |
5452 | if (TREE_CODE (r) == VAR_DECL) | |
5453 | { | |
5454 | tree init; | |
17f29637 | 5455 | |
7088fca9 KL |
5456 | if (DECL_INITIALIZED_IN_CLASS_P (r)) |
5457 | init = tsubst_expr (DECL_INITIAL (t), args, | |
5458 | tf_error | tf_warning, NULL_TREE); | |
5459 | else | |
5460 | init = NULL_TREE; | |
8d08fdba | 5461 | |
7088fca9 KL |
5462 | finish_static_data_member_decl (r, init, |
5463 | /*asmspec_tree=*/NULL_TREE, | |
5464 | /*flags=*/0); | |
8d08fdba | 5465 | |
7088fca9 KL |
5466 | if (DECL_INITIALIZED_IN_CLASS_P (r)) |
5467 | check_static_variable_definition (r, TREE_TYPE (r)); | |
5468 | } | |
5469 | else if (TREE_CODE (r) == FIELD_DECL) | |
5470 | { | |
5471 | /* Determine whether R has a valid type and can be | |
5472 | completed later. If R is invalid, then it is | |
5473 | replaced by error_mark_node so that it will not be | |
5474 | added to TYPE_FIELDS. */ | |
5475 | tree rtype = TREE_TYPE (r); | |
5476 | if (can_complete_type_without_circularity (rtype)) | |
5477 | complete_type (rtype); | |
5478 | ||
5479 | if (!COMPLETE_TYPE_P (rtype)) | |
5480 | { | |
5481 | cxx_incomplete_type_error (r, rtype); | |
5482 | r = error_mark_node; | |
5483 | } | |
5484 | } | |
5566b478 | 5485 | |
7088fca9 KL |
5486 | /* If it is a TYPE_DECL for a class-scoped ENUMERAL_TYPE, |
5487 | such a thing will already have been added to the field | |
5488 | list by tsubst_enum in finish_member_declaration in the | |
5489 | CLASSTYPE_TAGS case above. */ | |
5490 | if (!(TREE_CODE (r) == TYPE_DECL | |
5491 | && TREE_CODE (TREE_TYPE (r)) == ENUMERAL_TYPE | |
5492 | && TYPE_CONTEXT (TREE_TYPE (r)) == type)) | |
5493 | { | |
5494 | set_current_access_from_decl (r); | |
5495 | finish_member_declaration (r); | |
5496 | } | |
5497 | } | |
5498 | } | |
61fc8c9e | 5499 | } |
7088fca9 KL |
5500 | else |
5501 | { | |
5502 | if (TYPE_P (t) || DECL_CLASS_TEMPLATE_P (t)) | |
5503 | { | |
5504 | /* Build new CLASSTYPE_FRIEND_CLASSES. */ | |
5505 | ||
5506 | tree friend_type = t; | |
5507 | tree new_friend_type; | |
1aed5355 | 5508 | |
7088fca9 KL |
5509 | if (TREE_CODE (friend_type) == TEMPLATE_DECL) |
5510 | new_friend_type = tsubst_friend_class (friend_type, args); | |
5511 | else if (uses_template_parms (friend_type)) | |
5512 | new_friend_type = tsubst (friend_type, args, | |
5513 | tf_error | tf_warning, NULL_TREE); | |
5514 | else | |
5515 | { | |
5516 | tree ns = decl_namespace_context (TYPE_MAIN_DECL (friend_type)); | |
5517 | ||
5518 | /* The call to xref_tag_from_type does injection for friend | |
5519 | classes. */ | |
5520 | push_nested_namespace (ns); | |
5521 | new_friend_type = | |
5522 | xref_tag_from_type (friend_type, NULL_TREE, 1); | |
5523 | pop_nested_namespace (ns); | |
5524 | } | |
1aed5355 | 5525 | |
7088fca9 KL |
5526 | if (TREE_CODE (friend_type) == TEMPLATE_DECL) |
5527 | /* Trick make_friend_class into realizing that the friend | |
5528 | we're adding is a template, not an ordinary class. It's | |
5529 | important that we use make_friend_class since it will | |
5530 | perform some error-checking and output cross-reference | |
5531 | information. */ | |
5532 | ++processing_template_decl; | |
fc378698 | 5533 | |
7088fca9 KL |
5534 | if (new_friend_type != error_mark_node) |
5535 | make_friend_class (type, new_friend_type); | |
fc378698 | 5536 | |
7088fca9 KL |
5537 | if (TREE_CODE (friend_type) == TEMPLATE_DECL) |
5538 | --processing_template_decl; | |
5539 | } | |
5540 | else | |
963142fc MM |
5541 | /* Build new DECL_FRIENDLIST. */ |
5542 | add_friend (type, tsubst_friend_function (t, args)); | |
7088fca9 KL |
5543 | } |
5544 | } | |
5566b478 | 5545 | |
61a127b3 MM |
5546 | /* Set the file and line number information to whatever is given for |
5547 | the class itself. This puts error messages involving generated | |
5548 | implicit functions at a predictable point, and the same point | |
5549 | that would be used for non-template classes. */ | |
7088fca9 | 5550 | typedecl = TYPE_MAIN_DECL (type); |
82a98427 NS |
5551 | input_location = DECL_SOURCE_LOCATION (typedecl); |
5552 | ||
61a127b3 | 5553 | unreverse_member_declarations (type); |
9f33663b | 5554 | finish_struct_1 (type); |
2604412d | 5555 | CLASSTYPE_GOT_SEMICOLON (type) = 1; |
e92cc029 | 5556 | |
5524676d JM |
5557 | /* Clear this now so repo_template_used is happy. */ |
5558 | TYPE_BEING_DEFINED (type) = 0; | |
2604412d | 5559 | repo_template_used (type); |
8d08fdba | 5560 | |
9188c363 MM |
5561 | /* Now that the class is complete, instantiate default arguments for |
5562 | any member functions. We don't do this earlier because the | |
5563 | default arguments may reference members of the class. */ | |
5564 | if (!PRIMARY_TEMPLATE_P (template)) | |
5565 | for (t = TYPE_METHODS (type); t; t = TREE_CHAIN (t)) | |
5566 | if (TREE_CODE (t) == FUNCTION_DECL | |
dc957d14 | 5567 | /* Implicitly generated member functions will not have template |
9188c363 MM |
5568 | information; they are not instantiations, but instead are |
5569 | created "fresh" for each instantiation. */ | |
5570 | && DECL_TEMPLATE_INFO (t)) | |
5571 | tsubst_default_arguments (t); | |
5572 | ||
b74a0560 | 5573 | popclass (); |
5566b478 | 5574 | pop_from_top_level (); |
78757caa | 5575 | pop_deferring_access_checks (); |
5566b478 MS |
5576 | pop_tinst_level (); |
5577 | ||
9aad8f83 MA |
5578 | if (TYPE_CONTAINS_VPTR_P (type)) |
5579 | keyed_classes = tree_cons (NULL_TREE, type, keyed_classes); | |
5580 | ||
5566b478 | 5581 | return type; |
8d08fdba MS |
5582 | } |
5583 | ||
5584 | static int | |
5585 | list_eq (t1, t2) | |
5586 | tree t1, t2; | |
5587 | { | |
5588 | if (t1 == NULL_TREE) | |
5589 | return t2 == NULL_TREE; | |
5590 | if (t2 == NULL_TREE) | |
5591 | return 0; | |
5592 | /* Don't care if one declares its arg const and the other doesn't -- the | |
5593 | main variant of the arg type is all that matters. */ | |
5594 | if (TYPE_MAIN_VARIANT (TREE_VALUE (t1)) | |
5595 | != TYPE_MAIN_VARIANT (TREE_VALUE (t2))) | |
5596 | return 0; | |
5597 | return list_eq (TREE_CHAIN (t1), TREE_CHAIN (t2)); | |
5598 | } | |
5599 | ||
00d3396f JM |
5600 | /* If arg is a non-type template parameter that does not depend on template |
5601 | arguments, fold it like we weren't in the body of a template. */ | |
5602 | ||
5603 | static tree | |
5604 | maybe_fold_nontype_arg (arg) | |
5605 | tree arg; | |
5606 | { | |
4d5f3fbd | 5607 | if (arg && !TYPE_P (arg) && !uses_template_parms (arg)) |
00d3396f JM |
5608 | { |
5609 | /* Sometimes, one of the args was an expression involving a | |
5610 | template constant parameter, like N - 1. Now that we've | |
5611 | tsubst'd, we might have something like 2 - 1. This will | |
5612 | confuse lookup_template_class, so we do constant folding | |
5613 | here. We have to unset processing_template_decl, to | |
5614 | fool build_expr_from_tree() into building an actual | |
5615 | tree. */ | |
5616 | ||
4d5f3fbd KL |
5617 | /* If the TREE_TYPE of ARG is not NULL_TREE, ARG is already |
5618 | as simple as it's going to get, and trying to reprocess | |
5619 | the trees will break. */ | |
5620 | if (!TREE_TYPE (arg)) | |
5621 | { | |
5622 | int saved_processing_template_decl = processing_template_decl; | |
5623 | processing_template_decl = 0; | |
5624 | arg = build_expr_from_tree (arg); | |
5625 | processing_template_decl = saved_processing_template_decl; | |
5626 | } | |
5627 | ||
5628 | arg = fold (arg); | |
00d3396f JM |
5629 | } |
5630 | return arg; | |
5631 | } | |
5632 | ||
bd83b409 NS |
5633 | /* Apply maybe_fold_nontype_arg on a list or vector of args. */ |
5634 | ||
5635 | static void | |
5636 | maybe_fold_nontype_args (tree targs) | |
5637 | { | |
5638 | if (!targs) | |
5639 | /*OK*/; | |
5640 | else if (TREE_CODE (targs) == TREE_LIST) | |
5641 | { | |
5642 | tree chain; | |
5643 | for (chain = targs; chain; chain = TREE_CHAIN (chain)) | |
5644 | TREE_VALUE (chain) = maybe_fold_nontype_arg (TREE_VALUE (chain)); | |
5645 | } | |
5646 | else | |
5647 | { | |
5648 | int i; | |
5649 | for (i = 0; i < TREE_VEC_LENGTH (targs); ++i) | |
5650 | TREE_VEC_ELT (targs, i) | |
5651 | = maybe_fold_nontype_arg (TREE_VEC_ELT (targs, i)); | |
5652 | } | |
5653 | } | |
5654 | ||
830bfa74 MM |
5655 | /* Substitute ARGS into the vector of template arguments T. */ |
5656 | ||
e9659ab0 | 5657 | static tree |
4393e105 | 5658 | tsubst_template_arg_vector (t, args, complain) |
830bfa74 MM |
5659 | tree t; |
5660 | tree args; | |
c2ea3a40 | 5661 | tsubst_flags_t complain; |
830bfa74 MM |
5662 | { |
5663 | int len = TREE_VEC_LENGTH (t), need_new = 0, i; | |
5664 | tree *elts = (tree *) alloca (len * sizeof (tree)); | |
5665 | ||
961192e1 | 5666 | memset ((char *) elts, 0, len * sizeof (tree)); |
830bfa74 MM |
5667 | |
5668 | for (i = 0; i < len; i++) | |
5669 | { | |
5670 | if (TREE_VEC_ELT (t, i) != NULL_TREE | |
5671 | && TREE_CODE (TREE_VEC_ELT (t, i)) == TREE_VEC) | |
4393e105 MM |
5672 | elts[i] = tsubst_template_arg_vector (TREE_VEC_ELT (t, i), |
5673 | args, complain); | |
830bfa74 MM |
5674 | else |
5675 | elts[i] = maybe_fold_nontype_arg | |
4393e105 MM |
5676 | (tsubst_expr (TREE_VEC_ELT (t, i), args, complain, |
5677 | NULL_TREE)); | |
830bfa74 | 5678 | |
08e72a19 JM |
5679 | if (elts[i] == error_mark_node) |
5680 | return error_mark_node; | |
5681 | ||
830bfa74 MM |
5682 | if (elts[i] != TREE_VEC_ELT (t, i)) |
5683 | need_new = 1; | |
5684 | } | |
5685 | ||
5686 | if (!need_new) | |
5687 | return t; | |
5688 | ||
f31c0a32 | 5689 | t = make_tree_vec (len); |
830bfa74 MM |
5690 | for (i = 0; i < len; i++) |
5691 | TREE_VEC_ELT (t, i) = elts[i]; | |
5692 | ||
5693 | return t; | |
5694 | } | |
5695 | ||
36a117a5 MM |
5696 | /* Return the result of substituting ARGS into the template parameters |
5697 | given by PARMS. If there are m levels of ARGS and m + n levels of | |
5698 | PARMS, then the result will contain n levels of PARMS. For | |
5699 | example, if PARMS is `template <class T> template <class U> | |
5700 | template <T*, U, class V>' and ARGS is {{int}, {double}} then the | |
5701 | result will be `template <int*, double, class V>'. */ | |
5702 | ||
e9659ab0 | 5703 | static tree |
4393e105 | 5704 | tsubst_template_parms (parms, args, complain) |
36a117a5 MM |
5705 | tree parms; |
5706 | tree args; | |
c2ea3a40 | 5707 | tsubst_flags_t complain; |
36a117a5 | 5708 | { |
f71f87f9 MM |
5709 | tree r = NULL_TREE; |
5710 | tree* new_parms; | |
36a117a5 MM |
5711 | |
5712 | for (new_parms = &r; | |
5713 | TMPL_PARMS_DEPTH (parms) > TMPL_ARGS_DEPTH (args); | |
5714 | new_parms = &(TREE_CHAIN (*new_parms)), | |
5715 | parms = TREE_CHAIN (parms)) | |
5716 | { | |
5717 | tree new_vec = | |
5718 | make_tree_vec (TREE_VEC_LENGTH (TREE_VALUE (parms))); | |
5719 | int i; | |
5720 | ||
5721 | for (i = 0; i < TREE_VEC_LENGTH (new_vec); ++i) | |
5722 | { | |
833aa4c4 NS |
5723 | tree tuple = TREE_VEC_ELT (TREE_VALUE (parms), i); |
5724 | tree default_value = TREE_PURPOSE (tuple); | |
5725 | tree parm_decl = TREE_VALUE (tuple); | |
5726 | ||
5727 | parm_decl = tsubst (parm_decl, args, complain, NULL_TREE); | |
5728 | default_value = tsubst_expr (default_value, args, | |
5729 | complain, NULL_TREE); | |
5730 | tuple = build_tree_list (maybe_fold_nontype_arg (default_value), | |
5731 | parm_decl); | |
5732 | TREE_VEC_ELT (new_vec, i) = tuple; | |
36a117a5 MM |
5733 | } |
5734 | ||
5735 | *new_parms = | |
4890c2f4 MM |
5736 | tree_cons (size_int (TMPL_PARMS_DEPTH (parms) |
5737 | - TMPL_ARGS_DEPTH (args)), | |
36a117a5 MM |
5738 | new_vec, NULL_TREE); |
5739 | } | |
5740 | ||
5741 | return r; | |
5742 | } | |
5743 | ||
ed44da02 MM |
5744 | /* Substitute the ARGS into the indicated aggregate (or enumeration) |
5745 | type T. If T is not an aggregate or enumeration type, it is | |
5746 | handled as if by tsubst. IN_DECL is as for tsubst. If | |
838dfd8a | 5747 | ENTERING_SCOPE is nonzero, T is the context for a template which |
dc957d14 | 5748 | we are presently tsubst'ing. Return the substituted value. */ |
36a117a5 | 5749 | |
e9659ab0 | 5750 | static tree |
4393e105 | 5751 | tsubst_aggr_type (t, args, complain, in_decl, entering_scope) |
36a117a5 MM |
5752 | tree t; |
5753 | tree args; | |
c2ea3a40 | 5754 | tsubst_flags_t complain; |
36a117a5 MM |
5755 | tree in_decl; |
5756 | int entering_scope; | |
5757 | { | |
5758 | if (t == NULL_TREE) | |
5759 | return NULL_TREE; | |
5760 | ||
5761 | switch (TREE_CODE (t)) | |
5762 | { | |
5763 | case RECORD_TYPE: | |
5764 | if (TYPE_PTRMEMFUNC_P (t)) | |
46c895ac | 5765 | return tsubst (TYPE_PTRMEMFUNC_FN_TYPE (t), args, complain, in_decl); |
36a117a5 MM |
5766 | |
5767 | /* else fall through */ | |
ed44da02 | 5768 | case ENUMERAL_TYPE: |
36a117a5 | 5769 | case UNION_TYPE: |
5db698f6 | 5770 | if (TYPE_TEMPLATE_INFO (t)) |
36a117a5 MM |
5771 | { |
5772 | tree argvec; | |
5773 | tree context; | |
5774 | tree r; | |
5775 | ||
5776 | /* First, determine the context for the type we are looking | |
5777 | up. */ | |
5778 | if (TYPE_CONTEXT (t) != NULL_TREE) | |
5779 | context = tsubst_aggr_type (TYPE_CONTEXT (t), args, | |
4393e105 | 5780 | complain, |
36a117a5 MM |
5781 | in_decl, /*entering_scope=*/1); |
5782 | else | |
5783 | context = NULL_TREE; | |
5784 | ||
5785 | /* Then, figure out what arguments are appropriate for the | |
5786 | type we are trying to find. For example, given: | |
5787 | ||
5788 | template <class T> struct S; | |
5789 | template <class T, class U> void f(T, U) { S<U> su; } | |
5790 | ||
5791 | and supposing that we are instantiating f<int, double>, | |
5792 | then our ARGS will be {int, double}, but, when looking up | |
5793 | S we only want {double}. */ | |
4393e105 MM |
5794 | argvec = tsubst_template_arg_vector (TYPE_TI_ARGS (t), args, |
5795 | complain); | |
08e72a19 JM |
5796 | if (argvec == error_mark_node) |
5797 | return error_mark_node; | |
36a117a5 MM |
5798 | |
5799 | r = lookup_template_class (t, argvec, in_decl, context, | |
f9c244b8 | 5800 | entering_scope, complain); |
36a117a5 | 5801 | |
c2ea3a40 | 5802 | return cp_build_qualified_type_real (r, TYPE_QUALS (t), complain); |
36a117a5 MM |
5803 | } |
5804 | else | |
5805 | /* This is not a template type, so there's nothing to do. */ | |
5806 | return t; | |
5807 | ||
5808 | default: | |
4393e105 | 5809 | return tsubst (t, args, complain, in_decl); |
36a117a5 MM |
5810 | } |
5811 | } | |
5812 | ||
9188c363 MM |
5813 | /* Substitute into the default argument ARG (a default argument for |
5814 | FN), which has the indicated TYPE. */ | |
5815 | ||
5816 | tree | |
5817 | tsubst_default_argument (fn, type, arg) | |
5818 | tree fn; | |
5819 | tree type; | |
5820 | tree arg; | |
5821 | { | |
5822 | /* This default argument came from a template. Instantiate the | |
5823 | default argument here, not in tsubst. In the case of | |
5824 | something like: | |
5825 | ||
5826 | template <class T> | |
5827 | struct S { | |
5828 | static T t(); | |
5829 | void f(T = t()); | |
5830 | }; | |
5831 | ||
5832 | we must be careful to do name lookup in the scope of S<T>, | |
a29e1034 JM |
5833 | rather than in the current class. |
5834 | ||
5835 | ??? current_class_type affects a lot more than name lookup. This is | |
5836 | very fragile. Fortunately, it will go away when we do 2-phase name | |
5837 | binding properly. */ | |
2b59fc25 KL |
5838 | |
5839 | /* FN is already the desired FUNCTION_DECL. */ | |
5840 | push_access_scope (fn); | |
9188c363 | 5841 | |
c2ea3a40 NS |
5842 | arg = tsubst_expr (arg, DECL_TI_ARGS (fn), |
5843 | tf_error | tf_warning, NULL_TREE); | |
9188c363 | 5844 | |
2b59fc25 | 5845 | pop_access_scope (fn); |
9188c363 MM |
5846 | |
5847 | /* Make sure the default argument is reasonable. */ | |
5848 | arg = check_default_argument (type, arg); | |
5849 | ||
5850 | return arg; | |
5851 | } | |
5852 | ||
5853 | /* Substitute into all the default arguments for FN. */ | |
5854 | ||
5855 | static void | |
5856 | tsubst_default_arguments (fn) | |
5857 | tree fn; | |
5858 | { | |
5859 | tree arg; | |
5860 | tree tmpl_args; | |
5861 | ||
5862 | tmpl_args = DECL_TI_ARGS (fn); | |
5863 | ||
5864 | /* If this function is not yet instantiated, we certainly don't need | |
5865 | its default arguments. */ | |
5866 | if (uses_template_parms (tmpl_args)) | |
5867 | return; | |
5868 | ||
5869 | for (arg = TYPE_ARG_TYPES (TREE_TYPE (fn)); | |
5870 | arg; | |
5871 | arg = TREE_CHAIN (arg)) | |
5872 | if (TREE_PURPOSE (arg)) | |
5873 | TREE_PURPOSE (arg) = tsubst_default_argument (fn, | |
5874 | TREE_VALUE (arg), | |
5875 | TREE_PURPOSE (arg)); | |
5876 | } | |
5877 | ||
ae58fa02 MM |
5878 | /* Substitute the ARGS into the T, which is a _DECL. TYPE is the |
5879 | (already computed) substitution of ARGS into TREE_TYPE (T), if | |
c2ea3a40 NS |
5880 | appropriate. Return the result of the substitution. Issue error |
5881 | and warning messages under control of COMPLAIN. */ | |
00d3396f | 5882 | |
e9659ab0 | 5883 | static tree |
c2ea3a40 | 5884 | tsubst_decl (t, args, type, complain) |
ae58fa02 MM |
5885 | tree t; |
5886 | tree args; | |
5887 | tree type; | |
c2ea3a40 | 5888 | tsubst_flags_t complain; |
8d08fdba | 5889 | { |
82a98427 | 5890 | location_t saved_loc; |
b370501f | 5891 | tree r = NULL_TREE; |
4b2811e9 | 5892 | tree in_decl = t; |
830bfa74 | 5893 | |
ae58fa02 | 5894 | /* Set the filename and linenumber to improve error-reporting. */ |
82a98427 NS |
5895 | saved_loc = input_location; |
5896 | input_location = DECL_SOURCE_LOCATION (t); | |
b7484fbe | 5897 | |
8d08fdba MS |
5898 | switch (TREE_CODE (t)) |
5899 | { | |
98c1c668 JM |
5900 | case TEMPLATE_DECL: |
5901 | { | |
5902 | /* We can get here when processing a member template function | |
5903 | of a template class. */ | |
98c1c668 | 5904 | tree decl = DECL_TEMPLATE_RESULT (t); |
386b8a85 | 5905 | tree spec; |
db2767b6 | 5906 | int is_template_template_parm = DECL_TEMPLATE_TEMPLATE_PARM_P (t); |
98c1c668 | 5907 | |
db2767b6 MM |
5908 | if (!is_template_template_parm) |
5909 | { | |
36a117a5 MM |
5910 | /* We might already have an instance of this template. |
5911 | The ARGS are for the surrounding class type, so the | |
5912 | full args contain the tsubst'd args for the context, | |
5913 | plus the innermost args from the template decl. */ | |
5914 | tree tmpl_args = DECL_CLASS_TEMPLATE_P (t) | |
5915 | ? CLASSTYPE_TI_ARGS (TREE_TYPE (t)) | |
17aec3eb | 5916 | : DECL_TI_ARGS (DECL_TEMPLATE_RESULT (t)); |
7ddedda4 MM |
5917 | tree full_args; |
5918 | ||
4393e105 | 5919 | full_args = tsubst_template_arg_vector (tmpl_args, args, |
c2ea3a40 | 5920 | complain); |
36a117a5 MM |
5921 | |
5922 | /* tsubst_template_arg_vector doesn't copy the vector if | |
5923 | nothing changed. But, *something* should have | |
5924 | changed. */ | |
5925 | my_friendly_assert (full_args != tmpl_args, 0); | |
5926 | ||
5927 | spec = retrieve_specialization (t, full_args); | |
db2767b6 | 5928 | if (spec != NULL_TREE) |
ae58fa02 MM |
5929 | { |
5930 | r = spec; | |
5931 | break; | |
5932 | } | |
db2767b6 | 5933 | } |
98c1c668 JM |
5934 | |
5935 | /* Make a new template decl. It will be similar to the | |
5936 | original, but will record the current template arguments. | |
5937 | We also create a new function declaration, which is just | |
5938 | like the old one, but points to this new template, rather | |
5939 | than the old one. */ | |
0acf7199 | 5940 | r = copy_decl (t); |
ae58fa02 MM |
5941 | my_friendly_assert (DECL_LANG_SPECIFIC (r) != 0, 0); |
5942 | TREE_CHAIN (r) = NULL_TREE; | |
db2767b6 MM |
5943 | |
5944 | if (is_template_template_parm) | |
5945 | { | |
c2ea3a40 | 5946 | tree new_decl = tsubst (decl, args, complain, in_decl); |
17aec3eb | 5947 | DECL_TEMPLATE_RESULT (r) = new_decl; |
ae58fa02 MM |
5948 | TREE_TYPE (r) = TREE_TYPE (new_decl); |
5949 | break; | |
db2767b6 MM |
5950 | } |
5951 | ||
ae58fa02 | 5952 | DECL_CONTEXT (r) |
4f1c5b7d | 5953 | = tsubst_aggr_type (DECL_CONTEXT (t), args, |
c2ea3a40 | 5954 | complain, in_decl, |
4393e105 | 5955 | /*entering_scope=*/1); |
ae58fa02 | 5956 | DECL_TEMPLATE_INFO (r) = build_tree_list (t, args); |
93cdc044 JM |
5957 | |
5958 | if (TREE_CODE (decl) == TYPE_DECL) | |
5959 | { | |
c2ea3a40 | 5960 | tree new_type = tsubst (TREE_TYPE (t), args, complain, in_decl); |
ae58fa02 MM |
5961 | TREE_TYPE (r) = new_type; |
5962 | CLASSTYPE_TI_TEMPLATE (new_type) = r; | |
17aec3eb | 5963 | DECL_TEMPLATE_RESULT (r) = TYPE_MAIN_DECL (new_type); |
ae58fa02 | 5964 | DECL_TI_ARGS (r) = CLASSTYPE_TI_ARGS (new_type); |
93cdc044 JM |
5965 | } |
5966 | else | |
5967 | { | |
c2ea3a40 | 5968 | tree new_decl = tsubst (decl, args, complain, in_decl); |
17aec3eb RK |
5969 | |
5970 | DECL_TEMPLATE_RESULT (r) = new_decl; | |
ae58fa02 MM |
5971 | DECL_TI_TEMPLATE (new_decl) = r; |
5972 | TREE_TYPE (r) = TREE_TYPE (new_decl); | |
5973 | DECL_TI_ARGS (r) = DECL_TI_ARGS (new_decl); | |
93cdc044 JM |
5974 | } |
5975 | ||
ae58fa02 MM |
5976 | SET_DECL_IMPLICIT_INSTANTIATION (r); |
5977 | DECL_TEMPLATE_INSTANTIATIONS (r) = NULL_TREE; | |
5978 | DECL_TEMPLATE_SPECIALIZATIONS (r) = NULL_TREE; | |
98c1c668 JM |
5979 | |
5980 | /* The template parameters for this new template are all the | |
5981 | template parameters for the old template, except the | |
c6002625 | 5982 | outermost level of parameters. */ |
ae58fa02 | 5983 | DECL_TEMPLATE_PARMS (r) |
4393e105 | 5984 | = tsubst_template_parms (DECL_TEMPLATE_PARMS (t), args, |
c2ea3a40 | 5985 | complain); |
98c1c668 | 5986 | |
93cdc044 | 5987 | if (PRIMARY_TEMPLATE_P (t)) |
ae58fa02 | 5988 | DECL_PRIMARY_TEMPLATE (r) = r; |
93cdc044 | 5989 | |
8d019cef | 5990 | /* We don't partially instantiate partial specializations. */ |
93cdc044 | 5991 | if (TREE_CODE (decl) == TYPE_DECL) |
ae58fa02 | 5992 | break; |
93cdc044 | 5993 | |
75650646 | 5994 | /* Record this partial instantiation. */ |
ae58fa02 | 5995 | register_specialization (r, t, |
17aec3eb | 5996 | DECL_TI_ARGS (DECL_TEMPLATE_RESULT (r))); |
75650646 | 5997 | |
98c1c668 | 5998 | } |
ae58fa02 | 5999 | break; |
8d08fdba MS |
6000 | |
6001 | case FUNCTION_DECL: | |
6002 | { | |
386b8a85 | 6003 | tree ctx; |
87603ed0 | 6004 | tree argvec = NULL_TREE; |
cf38f48a | 6005 | tree *friends; |
36a117a5 | 6006 | tree gen_tmpl; |
5566b478 | 6007 | int member; |
d8c4447d MM |
6008 | int args_depth; |
6009 | int parms_depth; | |
5566b478 | 6010 | |
36a117a5 MM |
6011 | /* Nobody should be tsubst'ing into non-template functions. */ |
6012 | my_friendly_assert (DECL_TEMPLATE_INFO (t) != NULL_TREE, 0); | |
6013 | ||
6014 | if (TREE_CODE (DECL_TI_TEMPLATE (t)) == TEMPLATE_DECL) | |
6015 | { | |
6016 | tree spec; | |
6017 | ||
6018 | /* Calculate the most general template of which R is a | |
6019 | specialization, and the complete set of arguments used to | |
6020 | specialize R. */ | |
6021 | gen_tmpl = most_general_template (DECL_TI_TEMPLATE (t)); | |
7ddedda4 MM |
6022 | argvec |
6023 | = tsubst_template_arg_vector (DECL_TI_ARGS | |
6024 | (DECL_TEMPLATE_RESULT (gen_tmpl)), | |
c2ea3a40 | 6025 | args, complain); |
36a117a5 MM |
6026 | |
6027 | /* Check to see if we already have this specialization. */ | |
6028 | spec = retrieve_specialization (gen_tmpl, argvec); | |
7ddedda4 | 6029 | |
36a117a5 | 6030 | if (spec) |
ae58fa02 MM |
6031 | { |
6032 | r = spec; | |
6033 | break; | |
6034 | } | |
d8c4447d | 6035 | |
f9a7ae04 MM |
6036 | /* We can see more levels of arguments than parameters if |
6037 | there was a specialization of a member template, like | |
6038 | this: | |
6039 | ||
6040 | template <class T> struct S { template <class U> void f(); } | |
6041 | template <> template <class U> void S<int>::f(U); | |
6042 | ||
dc957d14 | 6043 | Here, we'll be substituting into the specialization, |
f9a7ae04 MM |
6044 | because that's where we can find the code we actually |
6045 | want to generate, but we'll have enough arguments for | |
6046 | the most general template. | |
6047 | ||
6048 | We also deal with the peculiar case: | |
d8c4447d MM |
6049 | |
6050 | template <class T> struct S { | |
6051 | template <class U> friend void f(); | |
6052 | }; | |
74b846e0 | 6053 | template <class U> void f() {} |
d8c4447d MM |
6054 | template S<int>; |
6055 | template void f<double>(); | |
6056 | ||
6057 | Here, the ARGS for the instantiation of will be {int, | |
6058 | double}. But, we only need as many ARGS as there are | |
6059 | levels of template parameters in CODE_PATTERN. We are | |
6060 | careful not to get fooled into reducing the ARGS in | |
6061 | situations like: | |
6062 | ||
6063 | template <class T> struct S { template <class U> void f(U); } | |
6064 | template <class T> template <> void S<T>::f(int) {} | |
6065 | ||
6066 | which we can spot because the pattern will be a | |
6067 | specialization in this case. */ | |
6068 | args_depth = TMPL_ARGS_DEPTH (args); | |
6069 | parms_depth = | |
6070 | TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (DECL_TI_TEMPLATE (t))); | |
6071 | if (args_depth > parms_depth | |
6072 | && !DECL_TEMPLATE_SPECIALIZATION (t)) | |
f9a7ae04 | 6073 | args = get_innermost_template_args (args, parms_depth); |
36a117a5 MM |
6074 | } |
6075 | else | |
6076 | { | |
6077 | /* This special case arises when we have something like this: | |
6078 | ||
6079 | template <class T> struct S { | |
6080 | friend void f<int>(int, double); | |
6081 | }; | |
6082 | ||
6083 | Here, the DECL_TI_TEMPLATE for the friend declaration | |
39c01e4c MM |
6084 | will be a LOOKUP_EXPR or an IDENTIFIER_NODE. We are |
6085 | being called from tsubst_friend_function, and we want | |
6086 | only to create a new decl (R) with appropriate types so | |
6087 | that we can call determine_specialization. */ | |
36a117a5 MM |
6088 | gen_tmpl = NULL_TREE; |
6089 | } | |
6090 | ||
6eb3bb27 | 6091 | if (DECL_CLASS_SCOPE_P (t)) |
8d08fdba | 6092 | { |
5566b478 MS |
6093 | if (DECL_NAME (t) == constructor_name (DECL_CONTEXT (t))) |
6094 | member = 2; | |
6095 | else | |
6096 | member = 1; | |
4f1c5b7d | 6097 | ctx = tsubst_aggr_type (DECL_CONTEXT (t), args, |
c2ea3a40 | 6098 | complain, t, |
36a117a5 | 6099 | /*entering_scope=*/1); |
5566b478 MS |
6100 | } |
6101 | else | |
6102 | { | |
6103 | member = 0; | |
4f1c5b7d | 6104 | ctx = DECL_CONTEXT (t); |
5566b478 | 6105 | } |
c2ea3a40 | 6106 | type = tsubst (type, args, complain, in_decl); |
b3da7bb1 MM |
6107 | if (type == error_mark_node) |
6108 | return error_mark_node; | |
8d08fdba | 6109 | |
5566b478 MS |
6110 | /* We do NOT check for matching decls pushed separately at this |
6111 | point, as they may not represent instantiations of this | |
6112 | template, and in any case are considered separate under the | |
0a7394bc | 6113 | discrete model. */ |
0acf7199 | 6114 | r = copy_decl (t); |
e1467ff2 | 6115 | DECL_USE_TEMPLATE (r) = 0; |
5566b478 | 6116 | TREE_TYPE (r) = type; |
92643fea MM |
6117 | /* Clear out the mangled name and RTL for the instantiation. */ |
6118 | SET_DECL_ASSEMBLER_NAME (r, NULL_TREE); | |
6119 | SET_DECL_RTL (r, NULL_RTX); | |
5566b478 | 6120 | |
4f1c5b7d | 6121 | DECL_CONTEXT (r) = ctx; |
5566b478 | 6122 | |
1f6e1acc | 6123 | if (member && DECL_CONV_FN_P (r)) |
1f84ec23 MM |
6124 | /* Type-conversion operator. Reconstruct the name, in |
6125 | case it's the name of one of the template's parameters. */ | |
6126 | DECL_NAME (r) = mangle_conv_op_name_for_type (TREE_TYPE (type)); | |
5566b478 | 6127 | |
4393e105 | 6128 | DECL_ARGUMENTS (r) = tsubst (DECL_ARGUMENTS (t), args, |
c2ea3a40 | 6129 | complain, t); |
477f6664 | 6130 | DECL_RESULT (r) = NULL_TREE; |
711734a9 JM |
6131 | |
6132 | TREE_STATIC (r) = 0; | |
6133 | TREE_PUBLIC (r) = TREE_PUBLIC (t); | |
6134 | DECL_EXTERNAL (r) = 1; | |
6135 | DECL_INTERFACE_KNOWN (r) = 0; | |
6136 | DECL_DEFER_OUTPUT (r) = 0; | |
6137 | TREE_CHAIN (r) = NULL_TREE; | |
6138 | DECL_PENDING_INLINE_INFO (r) = 0; | |
59026e79 | 6139 | DECL_PENDING_INLINE_P (r) = 0; |
655dc6ee | 6140 | DECL_SAVED_TREE (r) = NULL_TREE; |
711734a9 | 6141 | TREE_USED (r) = 0; |
db9b2174 MM |
6142 | if (DECL_CLONED_FUNCTION (r)) |
6143 | { | |
6144 | DECL_CLONED_FUNCTION (r) = tsubst (DECL_CLONED_FUNCTION (t), | |
c2ea3a40 | 6145 | args, complain, t); |
db9b2174 MM |
6146 | TREE_CHAIN (r) = TREE_CHAIN (DECL_CLONED_FUNCTION (r)); |
6147 | TREE_CHAIN (DECL_CLONED_FUNCTION (r)) = r; | |
6148 | } | |
711734a9 | 6149 | |
92643fea MM |
6150 | /* Set up the DECL_TEMPLATE_INFO for R. There's no need to do |
6151 | this in the special friend case mentioned above where | |
6152 | GEN_TMPL is NULL. */ | |
36a117a5 | 6153 | if (gen_tmpl) |
386b8a85 | 6154 | { |
36a117a5 | 6155 | DECL_TEMPLATE_INFO (r) |
e1b3e07d | 6156 | = tree_cons (gen_tmpl, argvec, NULL_TREE); |
36a117a5 MM |
6157 | SET_DECL_IMPLICIT_INSTANTIATION (r); |
6158 | register_specialization (r, gen_tmpl, argvec); | |
6159 | ||
9188c363 MM |
6160 | /* We're not supposed to instantiate default arguments |
6161 | until they are called, for a template. But, for a | |
6162 | declaration like: | |
6163 | ||
6164 | template <class T> void f () | |
6165 | { extern void g(int i = T()); } | |
6166 | ||
6167 | we should do the substitution when the template is | |
6168 | instantiated. We handle the member function case in | |
6169 | instantiate_class_template since the default arguments | |
6170 | might refer to other members of the class. */ | |
6171 | if (!member | |
6172 | && !PRIMARY_TEMPLATE_P (gen_tmpl) | |
6173 | && !uses_template_parms (argvec)) | |
6174 | tsubst_default_arguments (r); | |
386b8a85 | 6175 | } |
f181d4ae | 6176 | |
cf38f48a MM |
6177 | /* Copy the list of befriending classes. */ |
6178 | for (friends = &DECL_BEFRIENDING_CLASSES (r); | |
6179 | *friends; | |
6180 | friends = &TREE_CHAIN (*friends)) | |
6181 | { | |
6182 | *friends = copy_node (*friends); | |
6183 | TREE_VALUE (*friends) = tsubst (TREE_VALUE (*friends), | |
c2ea3a40 | 6184 | args, complain, |
cf38f48a MM |
6185 | in_decl); |
6186 | } | |
6187 | ||
212e7048 | 6188 | if (DECL_CONSTRUCTOR_P (r) || DECL_DESTRUCTOR_P (r)) |
f181d4ae MM |
6189 | { |
6190 | maybe_retrofit_in_chrg (r); | |
212e7048 MM |
6191 | if (DECL_CONSTRUCTOR_P (r)) |
6192 | grok_ctor_properties (ctx, r); | |
2be678ff JM |
6193 | /* If this is an instantiation of a member template, clone it. |
6194 | If it isn't, that'll be handled by | |
6195 | clone_constructors_and_destructors. */ | |
5e818b93 | 6196 | if (PRIMARY_TEMPLATE_P (gen_tmpl)) |
271e6f02 | 6197 | clone_function_decl (r, /*update_method_vec_p=*/0); |
f181d4ae | 6198 | } |
596ea4e5 | 6199 | else if (IDENTIFIER_OPNAME_P (DECL_NAME (r))) |
271e6f02 | 6200 | grok_op_properties (r, DECL_FRIEND_P (r)); |
8d08fdba | 6201 | } |
ae58fa02 | 6202 | break; |
8d08fdba MS |
6203 | |
6204 | case PARM_DECL: | |
6205 | { | |
ae58fa02 | 6206 | r = copy_node (t); |
833aa4c4 NS |
6207 | if (DECL_TEMPLATE_PARM_P (t)) |
6208 | SET_DECL_TEMPLATE_PARM_P (r); | |
8e51619a | 6209 | |
5566b478 | 6210 | TREE_TYPE (r) = type; |
89d684bb | 6211 | c_apply_type_quals_to_decl (cp_type_quals (type), r); |
1b8899d1 | 6212 | |
db2767b6 MM |
6213 | if (TREE_CODE (DECL_INITIAL (r)) != TEMPLATE_PARM_INDEX) |
6214 | DECL_INITIAL (r) = TREE_TYPE (r); | |
6215 | else | |
4393e105 | 6216 | DECL_INITIAL (r) = tsubst (DECL_INITIAL (r), args, |
c2ea3a40 | 6217 | complain, in_decl); |
db2767b6 | 6218 | |
5566b478 | 6219 | DECL_CONTEXT (r) = NULL_TREE; |
8e51619a JM |
6220 | |
6221 | if (!DECL_TEMPLATE_PARM_P (r)) | |
6222 | DECL_ARG_TYPE (r) = type_passed_as (type); | |
8d08fdba | 6223 | if (TREE_CHAIN (t)) |
4393e105 | 6224 | TREE_CHAIN (r) = tsubst (TREE_CHAIN (t), args, |
c2ea3a40 | 6225 | complain, TREE_CHAIN (t)); |
8d08fdba | 6226 | } |
ae58fa02 | 6227 | break; |
8d08fdba | 6228 | |
5566b478 MS |
6229 | case FIELD_DECL: |
6230 | { | |
0acf7199 | 6231 | r = copy_decl (t); |
1b8899d1 | 6232 | TREE_TYPE (r) = type; |
89d684bb | 6233 | c_apply_type_quals_to_decl (cp_type_quals (type), r); |
1b8899d1 MM |
6234 | |
6235 | /* We don't have to set DECL_CONTEXT here; it is set by | |
6236 | finish_member_declaration. */ | |
4393e105 | 6237 | DECL_INITIAL (r) = tsubst_expr (DECL_INITIAL (t), args, |
c2ea3a40 | 6238 | complain, in_decl); |
5566b478 | 6239 | TREE_CHAIN (r) = NULL_TREE; |
dfbb4f34 NS |
6240 | if (VOID_TYPE_P (type)) |
6241 | cp_error_at ("instantiation of `%D' as type `%T'", r, type); | |
5566b478 | 6242 | } |
ae58fa02 | 6243 | break; |
5566b478 MS |
6244 | |
6245 | case USING_DECL: | |
6246 | { | |
ae58fa02 | 6247 | r = copy_node (t); |
5566b478 | 6248 | DECL_INITIAL (r) |
c2ea3a40 | 6249 | = tsubst_copy (DECL_INITIAL (t), args, complain, in_decl); |
5566b478 | 6250 | TREE_CHAIN (r) = NULL_TREE; |
5566b478 | 6251 | } |
ae58fa02 | 6252 | break; |
5566b478 | 6253 | |
9188c363 | 6254 | case TYPE_DECL: |
88e1b92a JM |
6255 | if (TREE_CODE (type) == TEMPLATE_TEMPLATE_PARM |
6256 | || t == TYPE_MAIN_DECL (TREE_TYPE (t))) | |
9188c363 | 6257 | { |
88e1b92a JM |
6258 | /* If this is the canonical decl, we don't have to mess with |
6259 | instantiations, and often we can't (for typename, template | |
6260 | type parms and such). Note that TYPE_NAME is not correct for | |
6261 | the above test if we've copied the type for a typedef. */ | |
b9f39201 | 6262 | r = TYPE_NAME (type); |
9188c363 MM |
6263 | break; |
6264 | } | |
6265 | ||
6266 | /* Fall through. */ | |
6267 | ||
5566b478 MS |
6268 | case VAR_DECL: |
6269 | { | |
1cea0434 KG |
6270 | tree argvec = NULL_TREE; |
6271 | tree gen_tmpl = NULL_TREE; | |
36a117a5 | 6272 | tree spec; |
1cea0434 | 6273 | tree tmpl = NULL_TREE; |
9188c363 | 6274 | tree ctx; |
6dfbb909 | 6275 | int local_p; |
9188c363 | 6276 | |
6dfbb909 MM |
6277 | /* Assume this is a non-local variable. */ |
6278 | local_p = 0; | |
5566b478 | 6279 | |
de96bf57 | 6280 | if (TYPE_P (CP_DECL_CONTEXT (t))) |
9188c363 | 6281 | ctx = tsubst_aggr_type (DECL_CONTEXT (t), args, |
c2ea3a40 | 6282 | complain, |
9188c363 | 6283 | in_decl, /*entering_scope=*/1); |
2ba9c47e MM |
6284 | else if (DECL_NAMESPACE_SCOPE_P (t)) |
6285 | ctx = DECL_CONTEXT (t); | |
9188c363 | 6286 | else |
6dfbb909 MM |
6287 | { |
6288 | /* Subsequent calls to pushdecl will fill this in. */ | |
6289 | ctx = NULL_TREE; | |
2ba9c47e | 6290 | local_p = 1; |
6dfbb909 | 6291 | } |
9188c363 | 6292 | |
36a117a5 | 6293 | /* Check to see if we already have this specialization. */ |
6dfbb909 MM |
6294 | if (!local_p) |
6295 | { | |
6296 | tmpl = DECL_TI_TEMPLATE (t); | |
6297 | gen_tmpl = most_general_template (tmpl); | |
c2ea3a40 | 6298 | argvec = tsubst (DECL_TI_ARGS (t), args, complain, in_decl); |
6dfbb909 MM |
6299 | spec = retrieve_specialization (gen_tmpl, argvec); |
6300 | } | |
9188c363 | 6301 | else |
6dfbb909 | 6302 | spec = retrieve_local_specialization (t); |
9188c363 | 6303 | |
36a117a5 | 6304 | if (spec) |
ae58fa02 MM |
6305 | { |
6306 | r = spec; | |
6307 | break; | |
6308 | } | |
5566b478 | 6309 | |
0acf7199 | 6310 | r = copy_decl (t); |
edebf865 MM |
6311 | if (TREE_CODE (r) == VAR_DECL) |
6312 | type = complete_type (type); | |
01f4137f | 6313 | TREE_TYPE (r) = type; |
89d684bb | 6314 | c_apply_type_quals_to_decl (cp_type_quals (type), r); |
5566b478 | 6315 | DECL_CONTEXT (r) = ctx; |
92643fea MM |
6316 | /* Clear out the mangled name and RTL for the instantiation. */ |
6317 | SET_DECL_ASSEMBLER_NAME (r, NULL_TREE); | |
6318 | SET_DECL_RTL (r, NULL_RTX); | |
d11ad92e MS |
6319 | |
6320 | /* Don't try to expand the initializer until someone tries to use | |
6321 | this variable; otherwise we run into circular dependencies. */ | |
6322 | DECL_INITIAL (r) = NULL_TREE; | |
19e7881c | 6323 | SET_DECL_RTL (r, NULL_RTX); |
06ceef4e | 6324 | DECL_SIZE (r) = DECL_SIZE_UNIT (r) = 0; |
5566b478 | 6325 | |
e0942dcd MM |
6326 | /* Even if the original location is out of scope, the newly |
6327 | substituted one is not. */ | |
6328 | if (TREE_CODE (r) == VAR_DECL) | |
17bbb839 MM |
6329 | { |
6330 | DECL_DEAD_FOR_LOCAL (r) = 0; | |
6331 | DECL_INITIALIZED_P (r) = 0; | |
6332 | } | |
e0942dcd | 6333 | |
6dfbb909 MM |
6334 | if (!local_p) |
6335 | { | |
6336 | /* A static data member declaration is always marked | |
6337 | external when it is declared in-class, even if an | |
6338 | initializer is present. We mimic the non-template | |
6339 | processing here. */ | |
6340 | DECL_EXTERNAL (r) = 1; | |
fa8d6e85 | 6341 | |
6dfbb909 MM |
6342 | register_specialization (r, gen_tmpl, argvec); |
6343 | DECL_TEMPLATE_INFO (r) = tree_cons (tmpl, argvec, NULL_TREE); | |
6344 | SET_DECL_IMPLICIT_INSTANTIATION (r); | |
6345 | } | |
9188c363 | 6346 | else |
6dfbb909 | 6347 | register_local_specialization (r, t); |
5566b478 | 6348 | |
5566b478 | 6349 | TREE_CHAIN (r) = NULL_TREE; |
dfbb4f34 NS |
6350 | if (TREE_CODE (r) == VAR_DECL && VOID_TYPE_P (type)) |
6351 | cp_error_at ("instantiation of `%D' as type `%T'", r, type); | |
edebf865 MM |
6352 | /* Compute the size, alignment, etc. of R. */ |
6353 | layout_decl (r, 0); | |
5566b478 | 6354 | } |
ae58fa02 | 6355 | break; |
5566b478 | 6356 | |
ae58fa02 | 6357 | default: |
a98facb0 | 6358 | abort (); |
ae58fa02 MM |
6359 | } |
6360 | ||
6361 | /* Restore the file and line information. */ | |
82a98427 | 6362 | input_location = saved_loc; |
ae58fa02 MM |
6363 | |
6364 | return r; | |
6365 | } | |
6366 | ||
cabc336a MM |
6367 | /* Substitue into the ARG_TYPES of a function type. */ |
6368 | ||
e9659ab0 | 6369 | static tree |
4393e105 | 6370 | tsubst_arg_types (arg_types, args, complain, in_decl) |
cabc336a MM |
6371 | tree arg_types; |
6372 | tree args; | |
c2ea3a40 | 6373 | tsubst_flags_t complain; |
cabc336a MM |
6374 | tree in_decl; |
6375 | { | |
6376 | tree remaining_arg_types; | |
cabc336a MM |
6377 | tree type; |
6378 | ||
6379 | if (!arg_types || arg_types == void_list_node) | |
6380 | return arg_types; | |
6381 | ||
6382 | remaining_arg_types = tsubst_arg_types (TREE_CHAIN (arg_types), | |
4393e105 MM |
6383 | args, complain, in_decl); |
6384 | if (remaining_arg_types == error_mark_node) | |
6385 | return error_mark_node; | |
6386 | ||
6387 | type = tsubst (TREE_VALUE (arg_types), args, complain, in_decl); | |
6388 | if (type == error_mark_node) | |
6389 | return error_mark_node; | |
4b2811e9 NS |
6390 | if (VOID_TYPE_P (type)) |
6391 | { | |
c2ea3a40 | 6392 | if (complain & tf_error) |
4b2811e9 | 6393 | { |
33bd39a2 | 6394 | error ("invalid parameter type `%T'", type); |
4b2811e9 NS |
6395 | if (in_decl) |
6396 | cp_error_at ("in declaration `%D'", in_decl); | |
6397 | } | |
6398 | return error_mark_node; | |
6399 | } | |
cabc336a | 6400 | |
4393e105 MM |
6401 | /* Do array-to-pointer, function-to-pointer conversion, and ignore |
6402 | top-level qualifiers as required. */ | |
6403 | type = TYPE_MAIN_VARIANT (type_decays_to (type)); | |
cabc336a MM |
6404 | |
6405 | /* Note that we do not substitute into default arguments here. The | |
6406 | standard mandates that they be instantiated only when needed, | |
6407 | which is done in build_over_call. */ | |
51632249 JM |
6408 | return hash_tree_cons (TREE_PURPOSE (arg_types), type, |
6409 | remaining_arg_types); | |
cabc336a MM |
6410 | |
6411 | } | |
6412 | ||
4393e105 MM |
6413 | /* Substitute into a FUNCTION_TYPE or METHOD_TYPE. This routine does |
6414 | *not* handle the exception-specification for FNTYPE, because the | |
6415 | initial substitution of explicitly provided template parameters | |
6416 | during argument deduction forbids substitution into the | |
6417 | exception-specification: | |
6418 | ||
6419 | [temp.deduct] | |
6420 | ||
6421 | All references in the function type of the function template to the | |
6422 | corresponding template parameters are replaced by the specified tem- | |
6423 | plate argument values. If a substitution in a template parameter or | |
6424 | in the function type of the function template results in an invalid | |
6425 | type, type deduction fails. [Note: The equivalent substitution in | |
6426 | exception specifications is done only when the function is instanti- | |
6427 | ated, at which point a program is ill-formed if the substitution | |
6428 | results in an invalid type.] */ | |
6429 | ||
6430 | static tree | |
6431 | tsubst_function_type (t, args, complain, in_decl) | |
6432 | tree t; | |
6433 | tree args; | |
c2ea3a40 | 6434 | tsubst_flags_t complain; |
4393e105 MM |
6435 | tree in_decl; |
6436 | { | |
6437 | tree return_type; | |
6438 | tree arg_types; | |
6439 | tree fntype; | |
6440 | ||
8dd3f57a | 6441 | /* The TYPE_CONTEXT is not used for function/method types. */ |
4393e105 MM |
6442 | my_friendly_assert (TYPE_CONTEXT (t) == NULL_TREE, 0); |
6443 | ||
46c895ac | 6444 | /* Substitute the return type. */ |
4393e105 MM |
6445 | return_type = tsubst (TREE_TYPE (t), args, complain, in_decl); |
6446 | if (return_type == error_mark_node) | |
6447 | return error_mark_node; | |
6448 | ||
6449 | /* Substitue the argument types. */ | |
6450 | arg_types = tsubst_arg_types (TYPE_ARG_TYPES (t), args, | |
6451 | complain, in_decl); | |
6452 | if (arg_types == error_mark_node) | |
6453 | return error_mark_node; | |
6454 | ||
6455 | /* Construct a new type node and return it. */ | |
6456 | if (TREE_CODE (t) == FUNCTION_TYPE) | |
6457 | fntype = build_function_type (return_type, arg_types); | |
6458 | else | |
6459 | { | |
6460 | tree r = TREE_TYPE (TREE_VALUE (arg_types)); | |
6461 | if (! IS_AGGR_TYPE (r)) | |
6462 | { | |
6463 | /* [temp.deduct] | |
6464 | ||
6465 | Type deduction may fail for any of the following | |
6466 | reasons: | |
6467 | ||
6468 | -- Attempting to create "pointer to member of T" when T | |
6469 | is not a class type. */ | |
c2ea3a40 | 6470 | if (complain & tf_error) |
33bd39a2 | 6471 | error ("creating pointer to member function of non-class type `%T'", |
4393e105 MM |
6472 | r); |
6473 | return error_mark_node; | |
6474 | } | |
6475 | ||
6476 | fntype = build_cplus_method_type (r, return_type, TREE_CHAIN | |
6477 | (arg_types)); | |
6478 | } | |
c2ea3a40 | 6479 | fntype = cp_build_qualified_type_real (fntype, TYPE_QUALS (t), complain); |
ada846eb | 6480 | fntype = build_type_attribute_variant (fntype, TYPE_ATTRIBUTES (t)); |
4393e105 MM |
6481 | |
6482 | return fntype; | |
6483 | } | |
6484 | ||
297e73d8 MM |
6485 | /* Substitute into the PARMS of a call-declarator. */ |
6486 | ||
e9659ab0 | 6487 | static tree |
4393e105 | 6488 | tsubst_call_declarator_parms (parms, args, complain, in_decl) |
297e73d8 MM |
6489 | tree parms; |
6490 | tree args; | |
c2ea3a40 | 6491 | tsubst_flags_t complain; |
297e73d8 MM |
6492 | tree in_decl; |
6493 | { | |
6494 | tree new_parms; | |
6495 | tree type; | |
6496 | tree defarg; | |
6497 | ||
6498 | if (!parms || parms == void_list_node) | |
6499 | return parms; | |
6500 | ||
6501 | new_parms = tsubst_call_declarator_parms (TREE_CHAIN (parms), | |
4393e105 | 6502 | args, complain, in_decl); |
297e73d8 MM |
6503 | |
6504 | /* Figure out the type of this parameter. */ | |
4393e105 | 6505 | type = tsubst (TREE_VALUE (parms), args, complain, in_decl); |
297e73d8 MM |
6506 | |
6507 | /* Figure out the default argument as well. Note that we use | |
4393e105 MM |
6508 | tsubst_expr since the default argument is really an expression. */ |
6509 | defarg = tsubst_expr (TREE_PURPOSE (parms), args, complain, in_decl); | |
297e73d8 MM |
6510 | |
6511 | /* Chain this parameter on to the front of those we have already | |
6512 | processed. We don't use hash_tree_cons because that function | |
6513 | doesn't check TREE_PARMLIST. */ | |
6514 | new_parms = tree_cons (defarg, type, new_parms); | |
6515 | ||
6516 | /* And note that these are parameters. */ | |
6517 | TREE_PARMLIST (new_parms) = 1; | |
6518 | ||
6519 | return new_parms; | |
6520 | } | |
6521 | ||
4393e105 MM |
6522 | /* Take the tree structure T and replace template parameters used |
6523 | therein with the argument vector ARGS. IN_DECL is an associated | |
6524 | decl for diagnostics. If an error occurs, returns ERROR_MARK_NODE. | |
c2ea3a40 NS |
6525 | Issue error and warning messages under control of COMPLAIN. Note |
6526 | that we must be relatively non-tolerant of extensions here, in | |
6527 | order to preserve conformance; if we allow substitutions that | |
6528 | should not be allowed, we may allow argument deductions that should | |
6529 | not succeed, and therefore report ambiguous overload situations | |
6530 | where there are none. In theory, we could allow the substitution, | |
6531 | but indicate that it should have failed, and allow our caller to | |
6532 | make sure that the right thing happens, but we don't try to do this | |
6533 | yet. | |
4393e105 MM |
6534 | |
6535 | This function is used for dealing with types, decls and the like; | |
6536 | for expressions, use tsubst_expr or tsubst_copy. */ | |
ae58fa02 | 6537 | |
14d22dd6 | 6538 | static tree |
4393e105 | 6539 | tsubst (t, args, complain, in_decl) |
ae58fa02 | 6540 | tree t, args; |
c2ea3a40 | 6541 | tsubst_flags_t complain; |
ae58fa02 MM |
6542 | tree in_decl; |
6543 | { | |
0ecfe0b4 | 6544 | tree type, r; |
ae58fa02 MM |
6545 | |
6546 | if (t == NULL_TREE || t == error_mark_node | |
6547 | || t == integer_type_node | |
6548 | || t == void_type_node | |
6549 | || t == char_type_node | |
6550 | || TREE_CODE (t) == NAMESPACE_DECL) | |
6551 | return t; | |
6552 | ||
6553 | if (TREE_CODE (t) == IDENTIFIER_NODE) | |
6554 | type = IDENTIFIER_TYPE_VALUE (t); | |
6555 | else | |
6556 | type = TREE_TYPE (t); | |
6557 | if (type == unknown_type_node) | |
a98facb0 | 6558 | abort (); |
ae58fa02 MM |
6559 | |
6560 | if (type && TREE_CODE (t) != FUNCTION_DECL | |
6561 | && TREE_CODE (t) != TYPENAME_TYPE | |
6562 | && TREE_CODE (t) != TEMPLATE_DECL | |
4393e105 MM |
6563 | && TREE_CODE (t) != IDENTIFIER_NODE |
6564 | && TREE_CODE (t) != FUNCTION_TYPE | |
6565 | && TREE_CODE (t) != METHOD_TYPE) | |
6566 | type = tsubst (type, args, complain, in_decl); | |
6567 | if (type == error_mark_node) | |
6568 | return error_mark_node; | |
ae58fa02 | 6569 | |
2f939d94 | 6570 | if (DECL_P (t)) |
c2ea3a40 | 6571 | return tsubst_decl (t, args, type, complain); |
ae58fa02 MM |
6572 | |
6573 | switch (TREE_CODE (t)) | |
6574 | { | |
6575 | case RECORD_TYPE: | |
6576 | case UNION_TYPE: | |
6577 | case ENUMERAL_TYPE: | |
4393e105 MM |
6578 | return tsubst_aggr_type (t, args, complain, in_decl, |
6579 | /*entering_scope=*/0); | |
ae58fa02 MM |
6580 | |
6581 | case ERROR_MARK: | |
6582 | case IDENTIFIER_NODE: | |
ae58fa02 MM |
6583 | case VOID_TYPE: |
6584 | case REAL_TYPE: | |
6585 | case COMPLEX_TYPE: | |
c00996a3 | 6586 | case VECTOR_TYPE: |
ae58fa02 MM |
6587 | case BOOLEAN_TYPE: |
6588 | case INTEGER_CST: | |
6589 | case REAL_CST: | |
6590 | case STRING_CST: | |
6591 | return t; | |
6592 | ||
6593 | case INTEGER_TYPE: | |
6594 | if (t == integer_type_node) | |
6595 | return t; | |
6596 | ||
6597 | if (TREE_CODE (TYPE_MIN_VALUE (t)) == INTEGER_CST | |
6598 | && TREE_CODE (TYPE_MAX_VALUE (t)) == INTEGER_CST) | |
6599 | return t; | |
d2e5ee5c | 6600 | |
5566b478 | 6601 | { |
ddce3528 | 6602 | tree max, omax = TREE_OPERAND (TYPE_MAX_VALUE (t), 0); |
7ddedda4 | 6603 | |
ddce3528 | 6604 | max = tsubst_expr (omax, args, complain, in_decl); |
4393e105 MM |
6605 | if (max == error_mark_node) |
6606 | return error_mark_node; | |
6607 | ||
8dd3f57a MM |
6608 | /* See if we can reduce this expression to something simpler. */ |
6609 | max = maybe_fold_nontype_arg (max); | |
fc611ce0 | 6610 | if (!processing_template_decl) |
8dd3f57a MM |
6611 | max = decl_constant_value (max); |
6612 | ||
856216bb MM |
6613 | if (processing_template_decl |
6614 | /* When providing explicit arguments to a template | |
6615 | function, but leaving some arguments for subsequent | |
6616 | deduction, MAX may be template-dependent even if we're | |
c95cd22e JM |
6617 | not PROCESSING_TEMPLATE_DECL. We still need to check for |
6618 | template parms, though; MAX won't be an INTEGER_CST for | |
6619 | dynamic arrays, either. */ | |
6620 | || (TREE_CODE (max) != INTEGER_CST | |
6621 | && uses_template_parms (max))) | |
ae58fa02 | 6622 | { |
8dd3f57a MM |
6623 | tree itype = make_node (INTEGER_TYPE); |
6624 | TYPE_MIN_VALUE (itype) = size_zero_node; | |
6625 | TYPE_MAX_VALUE (itype) = build_min (MINUS_EXPR, sizetype, max, | |
6626 | integer_one_node); | |
6627 | return itype; | |
ae58fa02 MM |
6628 | } |
6629 | ||
ddce3528 JM |
6630 | if (integer_zerop (omax)) |
6631 | { | |
6632 | /* Still allow an explicit array of size zero. */ | |
6633 | if (pedantic) | |
6634 | pedwarn ("creating array with size zero"); | |
6635 | } | |
07c88314 MM |
6636 | else if (integer_zerop (max) |
6637 | || (TREE_CODE (max) == INTEGER_CST | |
6638 | && INT_CST_LT (max, integer_zero_node))) | |
0ecfe0b4 | 6639 | { |
4393e105 MM |
6640 | /* [temp.deduct] |
6641 | ||
6642 | Type deduction may fail for any of the following | |
6643 | reasons: | |
6644 | ||
bf8f3f93 MM |
6645 | Attempting to create an array with a size that is |
6646 | zero or negative. */ | |
c2ea3a40 | 6647 | if (complain & tf_error) |
33bd39a2 | 6648 | error ("creating array with size zero (`%E')", max); |
4393e105 MM |
6649 | |
6650 | return error_mark_node; | |
0ecfe0b4 JM |
6651 | } |
6652 | ||
c95cd22e | 6653 | return compute_array_index_type (NULL_TREE, max); |
ae58fa02 MM |
6654 | } |
6655 | ||
6656 | case TEMPLATE_TYPE_PARM: | |
6657 | case TEMPLATE_TEMPLATE_PARM: | |
a1281f45 | 6658 | case BOUND_TEMPLATE_TEMPLATE_PARM: |
ae58fa02 MM |
6659 | case TEMPLATE_PARM_INDEX: |
6660 | { | |
6661 | int idx; | |
6662 | int level; | |
6663 | int levels; | |
0ecfe0b4 JM |
6664 | |
6665 | r = NULL_TREE; | |
ae58fa02 MM |
6666 | |
6667 | if (TREE_CODE (t) == TEMPLATE_TYPE_PARM | |
a1281f45 KL |
6668 | || TREE_CODE (t) == TEMPLATE_TEMPLATE_PARM |
6669 | || TREE_CODE (t) == BOUND_TEMPLATE_TEMPLATE_PARM) | |
ae58fa02 MM |
6670 | { |
6671 | idx = TEMPLATE_TYPE_IDX (t); | |
6672 | level = TEMPLATE_TYPE_LEVEL (t); | |
6673 | } | |
6674 | else | |
6675 | { | |
6676 | idx = TEMPLATE_PARM_IDX (t); | |
6677 | level = TEMPLATE_PARM_LEVEL (t); | |
6678 | } | |
6679 | ||
6680 | if (TREE_VEC_LENGTH (args) > 0) | |
6681 | { | |
6682 | tree arg = NULL_TREE; | |
6683 | ||
6684 | levels = TMPL_ARGS_DEPTH (args); | |
6685 | if (level <= levels) | |
6686 | arg = TMPL_ARG (args, level, idx); | |
6687 | ||
8b5b8b7c MM |
6688 | if (arg == error_mark_node) |
6689 | return error_mark_node; | |
6690 | else if (arg != NULL_TREE) | |
ae58fa02 MM |
6691 | { |
6692 | if (TREE_CODE (t) == TEMPLATE_TYPE_PARM) | |
6693 | { | |
2f939d94 | 6694 | my_friendly_assert (TYPE_P (arg), 0); |
adecb3f4 | 6695 | return cp_build_qualified_type_real |
89d684bb | 6696 | (arg, cp_type_quals (arg) | cp_type_quals (t), |
4f2b0fb2 | 6697 | complain | tf_ignore_bad_quals); |
ae58fa02 | 6698 | } |
a1281f45 | 6699 | else if (TREE_CODE (t) == BOUND_TEMPLATE_TEMPLATE_PARM) |
ae58fa02 | 6700 | { |
a1281f45 KL |
6701 | /* We are processing a type constructed from |
6702 | a template template parameter */ | |
6703 | tree argvec = tsubst (TYPE_TI_ARGS (t), | |
6704 | args, complain, in_decl); | |
6705 | if (argvec == error_mark_node) | |
6706 | return error_mark_node; | |
4393e105 | 6707 | |
a1281f45 KL |
6708 | /* We can get a TEMPLATE_TEMPLATE_PARM here when |
6709 | we are resolving nested-types in the signature of | |
6710 | a member function templates. | |
6711 | Otherwise ARG is a TEMPLATE_DECL and is the real | |
6712 | template to be instantiated. */ | |
6713 | if (TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM) | |
6714 | arg = TYPE_NAME (arg); | |
6715 | ||
6716 | r = lookup_template_class (arg, | |
6717 | argvec, in_decl, | |
6718 | DECL_CONTEXT (arg), | |
f9c244b8 NS |
6719 | /*entering_scope=*/0, |
6720 | complain); | |
c2ea3a40 NS |
6721 | return cp_build_qualified_type_real |
6722 | (r, TYPE_QUALS (t), complain); | |
ae58fa02 MM |
6723 | } |
6724 | else | |
a1281f45 | 6725 | /* TEMPLATE_TEMPLATE_PARM or TEMPLATE_PARM_INDEX. */ |
ae58fa02 MM |
6726 | return arg; |
6727 | } | |
6728 | } | |
51924768 | 6729 | else |
a98facb0 | 6730 | abort (); |
ae58fa02 MM |
6731 | |
6732 | if (level == 1) | |
6733 | /* This can happen during the attempted tsubst'ing in | |
6734 | unify. This means that we don't yet have any information | |
6735 | about the template parameter in question. */ | |
6736 | return t; | |
6737 | ||
6738 | /* If we get here, we must have been looking at a parm for a | |
6739 | more deeply nested template. Make a new version of this | |
6740 | template parameter, but with a lower level. */ | |
6741 | switch (TREE_CODE (t)) | |
6742 | { | |
6743 | case TEMPLATE_TYPE_PARM: | |
6744 | case TEMPLATE_TEMPLATE_PARM: | |
a1281f45 | 6745 | case BOUND_TEMPLATE_TEMPLATE_PARM: |
89d684bb | 6746 | if (cp_type_quals (t)) |
ae58fa02 | 6747 | { |
9ccf6541 | 6748 | r = tsubst (TYPE_MAIN_VARIANT (t), args, complain, in_decl); |
4f2b0fb2 NS |
6749 | r = cp_build_qualified_type_real |
6750 | (r, cp_type_quals (t), | |
6751 | complain | (TREE_CODE (t) == TEMPLATE_TYPE_PARM | |
6752 | ? tf_ignore_bad_quals : 0)); | |
9ccf6541 MM |
6753 | } |
6754 | else | |
6755 | { | |
11e74ea6 | 6756 | r = copy_type (t); |
9ccf6541 MM |
6757 | TEMPLATE_TYPE_PARM_INDEX (r) |
6758 | = reduce_template_parm_level (TEMPLATE_TYPE_PARM_INDEX (t), | |
6759 | r, levels); | |
6760 | TYPE_STUB_DECL (r) = TYPE_NAME (r) = TEMPLATE_TYPE_DECL (r); | |
6761 | TYPE_MAIN_VARIANT (r) = r; | |
6762 | TYPE_POINTER_TO (r) = NULL_TREE; | |
6763 | TYPE_REFERENCE_TO (r) = NULL_TREE; | |
6764 | ||
a1281f45 | 6765 | if (TREE_CODE (t) == BOUND_TEMPLATE_TEMPLATE_PARM) |
9ccf6541 MM |
6766 | { |
6767 | tree argvec = tsubst (TYPE_TI_ARGS (t), args, | |
6768 | complain, in_decl); | |
6769 | if (argvec == error_mark_node) | |
6770 | return error_mark_node; | |
4393e105 | 6771 | |
9ccf6541 MM |
6772 | TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (r) |
6773 | = tree_cons (TYPE_TI_TEMPLATE (t), argvec, NULL_TREE); | |
6774 | } | |
ae58fa02 MM |
6775 | } |
6776 | break; | |
6777 | ||
6778 | case TEMPLATE_PARM_INDEX: | |
6779 | r = reduce_template_parm_level (t, type, levels); | |
6780 | break; | |
6781 | ||
6782 | default: | |
a98facb0 | 6783 | abort (); |
ae58fa02 MM |
6784 | } |
6785 | ||
5566b478 | 6786 | return r; |
ae58fa02 | 6787 | } |
5566b478 | 6788 | |
8d08fdba MS |
6789 | case TREE_LIST: |
6790 | { | |
6791 | tree purpose, value, chain, result; | |
8d08fdba MS |
6792 | |
6793 | if (t == void_list_node) | |
6794 | return t; | |
6795 | ||
8d08fdba MS |
6796 | purpose = TREE_PURPOSE (t); |
6797 | if (purpose) | |
4393e105 MM |
6798 | { |
6799 | purpose = tsubst (purpose, args, complain, in_decl); | |
6800 | if (purpose == error_mark_node) | |
6801 | return error_mark_node; | |
6802 | } | |
8d08fdba MS |
6803 | value = TREE_VALUE (t); |
6804 | if (value) | |
4393e105 MM |
6805 | { |
6806 | value = tsubst (value, args, complain, in_decl); | |
6807 | if (value == error_mark_node) | |
6808 | return error_mark_node; | |
6809 | } | |
8d08fdba MS |
6810 | chain = TREE_CHAIN (t); |
6811 | if (chain && chain != void_type_node) | |
4393e105 MM |
6812 | { |
6813 | chain = tsubst (chain, args, complain, in_decl); | |
6814 | if (chain == error_mark_node) | |
6815 | return error_mark_node; | |
6816 | } | |
8d08fdba MS |
6817 | if (purpose == TREE_PURPOSE (t) |
6818 | && value == TREE_VALUE (t) | |
6819 | && chain == TREE_CHAIN (t)) | |
6820 | return t; | |
cbd5937a MM |
6821 | if (TREE_PARMLIST (t)) |
6822 | { | |
6823 | result = tree_cons (purpose, value, chain); | |
6824 | TREE_PARMLIST (result) = 1; | |
6825 | } | |
6826 | else | |
6827 | result = hash_tree_cons (purpose, value, chain); | |
8d08fdba MS |
6828 | return result; |
6829 | } | |
6830 | case TREE_VEC: | |
5566b478 MS |
6831 | if (type != NULL_TREE) |
6832 | { | |
1ceaad38 JM |
6833 | /* A binfo node. We always need to make a copy, of the node |
6834 | itself and of its BINFO_BASETYPES. */ | |
85b71cf2 | 6835 | |
5566b478 MS |
6836 | t = copy_node (t); |
6837 | ||
c7449f2b JM |
6838 | /* Make sure type isn't a typedef copy. */ |
6839 | type = BINFO_TYPE (TYPE_BINFO (type)); | |
6840 | ||
5566b478 | 6841 | TREE_TYPE (t) = complete_type (type); |
6633d636 MS |
6842 | if (IS_AGGR_TYPE (type)) |
6843 | { | |
6844 | BINFO_VTABLE (t) = TYPE_BINFO_VTABLE (type); | |
6845 | BINFO_VIRTUALS (t) = TYPE_BINFO_VIRTUALS (type); | |
6846 | if (TYPE_BINFO_BASETYPES (type) != NULL_TREE) | |
6847 | BINFO_BASETYPES (t) = copy_node (TYPE_BINFO_BASETYPES (type)); | |
6848 | } | |
5566b478 MS |
6849 | return t; |
6850 | } | |
85b71cf2 JM |
6851 | |
6852 | /* Otherwise, a vector of template arguments. */ | |
4393e105 | 6853 | return tsubst_template_arg_vector (t, args, complain); |
8d08fdba | 6854 | |
8d08fdba MS |
6855 | case POINTER_TYPE: |
6856 | case REFERENCE_TYPE: | |
6857 | { | |
8d08fdba | 6858 | enum tree_code code; |
79a7c7fa | 6859 | |
46c895ac | 6860 | if (type == TREE_TYPE (t) && TREE_CODE (type) != METHOD_TYPE) |
8d08fdba MS |
6861 | return t; |
6862 | ||
6863 | code = TREE_CODE (t); | |
4393e105 MM |
6864 | |
6865 | ||
6866 | /* [temp.deduct] | |
6867 | ||
6868 | Type deduction may fail for any of the following | |
6869 | reasons: | |
6870 | ||
6871 | -- Attempting to create a pointer to reference type. | |
6872 | -- Attempting to create a reference to a reference type or | |
6873 | a reference to void. */ | |
0ecfe0b4 JM |
6874 | if (TREE_CODE (type) == REFERENCE_TYPE |
6875 | || (code == REFERENCE_TYPE && TREE_CODE (type) == VOID_TYPE)) | |
79a7c7fa | 6876 | { |
82a98427 | 6877 | static location_t last_loc; |
79a7c7fa JM |
6878 | |
6879 | /* We keep track of the last time we issued this error | |
6880 | message to avoid spewing a ton of messages during a | |
6881 | single bad template instantiation. */ | |
c2ea3a40 | 6882 | if (complain & tf_error |
82a98427 NS |
6883 | && (last_loc.line != input_line |
6884 | || last_loc.file != input_filename)) | |
79a7c7fa | 6885 | { |
0ecfe0b4 | 6886 | if (TREE_CODE (type) == VOID_TYPE) |
33bd39a2 | 6887 | error ("forming reference to void"); |
0ecfe0b4 | 6888 | else |
33bd39a2 | 6889 | error ("forming %s to reference type `%T'", |
0ecfe0b4 JM |
6890 | (code == POINTER_TYPE) ? "pointer" : "reference", |
6891 | type); | |
82a98427 | 6892 | last_loc = input_location; |
79a7c7fa JM |
6893 | } |
6894 | ||
4393e105 | 6895 | return error_mark_node; |
79a7c7fa JM |
6896 | } |
6897 | else if (code == POINTER_TYPE) | |
46c895ac NS |
6898 | { |
6899 | r = build_pointer_type (type); | |
6900 | if (TREE_CODE (type) == METHOD_TYPE) | |
6901 | r = build_ptrmemfunc_type (r); | |
6902 | } | |
8d08fdba MS |
6903 | else |
6904 | r = build_reference_type (type); | |
adecb3f4 | 6905 | r = cp_build_qualified_type_real (r, TYPE_QUALS (t), complain); |
79a7c7fa | 6906 | |
a5f1c5f8 NS |
6907 | if (r != error_mark_node) |
6908 | /* Will this ever be needed for TYPE_..._TO values? */ | |
6909 | layout_type (r); | |
6910 | ||
8d08fdba MS |
6911 | return r; |
6912 | } | |
a4443a08 | 6913 | case OFFSET_TYPE: |
0ecfe0b4 | 6914 | { |
4393e105 MM |
6915 | r = tsubst (TYPE_OFFSET_BASETYPE (t), args, complain, in_decl); |
6916 | if (r == error_mark_node || !IS_AGGR_TYPE (r)) | |
6917 | { | |
6918 | /* [temp.deduct] | |
6919 | ||
6920 | Type deduction may fail for any of the following | |
6921 | reasons: | |
6922 | ||
6923 | -- Attempting to create "pointer to member of T" when T | |
6924 | is not a class type. */ | |
c2ea3a40 NS |
6925 | if (complain & tf_error) |
6926 | error ("creating pointer to member of non-class type `%T'", r); | |
4393e105 MM |
6927 | return error_mark_node; |
6928 | } | |
46c895ac NS |
6929 | if (TREE_CODE (type) == REFERENCE_TYPE) |
6930 | { | |
4f09be91 | 6931 | if (complain & tf_error) |
46c895ac NS |
6932 | error ("creating pointer to member reference type `%T'", type); |
6933 | ||
6934 | return error_mark_node; | |
6935 | } | |
6936 | my_friendly_assert (TREE_CODE (type) != METHOD_TYPE, 20011231); | |
6937 | if (TREE_CODE (type) == FUNCTION_TYPE) | |
6938 | /* This is really a method type. The cv qualifiers of the | |
6939 | this pointer should _not_ be determined by the cv | |
6940 | qualifiers of the class type. They should be held | |
6941 | somewhere in the FUNCTION_TYPE, but we don't do that at | |
6942 | the moment. Consider | |
6943 | typedef void (Func) () const; | |
6944 | ||
6945 | template <typename T1> void Foo (Func T1::*); | |
6946 | ||
6947 | */ | |
6948 | return build_cplus_method_type (TYPE_MAIN_VARIANT (r), | |
6949 | TREE_TYPE (type), | |
6950 | TYPE_ARG_TYPES (type)); | |
6951 | else | |
6952 | return build_offset_type (r, type); | |
0ecfe0b4 | 6953 | } |
8d08fdba MS |
6954 | case FUNCTION_TYPE: |
6955 | case METHOD_TYPE: | |
6956 | { | |
c11b6f21 | 6957 | tree fntype; |
4393e105 | 6958 | tree raises; |
8d08fdba | 6959 | |
4393e105 MM |
6960 | fntype = tsubst_function_type (t, args, complain, in_decl); |
6961 | if (fntype == error_mark_node) | |
6962 | return error_mark_node; | |
cabc336a | 6963 | |
c6002625 | 6964 | /* Substitue the exception specification. */ |
cabc336a | 6965 | raises = TYPE_RAISES_EXCEPTIONS (t); |
c11b6f21 MS |
6966 | if (raises) |
6967 | { | |
4cc1d462 NS |
6968 | tree list = NULL_TREE; |
6969 | ||
6970 | if (! TREE_VALUE (raises)) | |
6971 | list = raises; | |
6972 | else | |
6973 | for (; raises != NULL_TREE; raises = TREE_CHAIN (raises)) | |
6974 | { | |
6975 | tree spec = TREE_VALUE (raises); | |
6976 | ||
6977 | spec = tsubst (spec, args, complain, in_decl); | |
6978 | if (spec == error_mark_node) | |
6979 | return spec; | |
6980 | list = add_exception_specifier (list, spec, complain); | |
6981 | } | |
6982 | fntype = build_exception_variant (fntype, list); | |
c11b6f21 MS |
6983 | } |
6984 | return fntype; | |
8d08fdba MS |
6985 | } |
6986 | case ARRAY_TYPE: | |
6987 | { | |
4393e105 MM |
6988 | tree domain = tsubst (TYPE_DOMAIN (t), args, complain, in_decl); |
6989 | if (domain == error_mark_node) | |
6990 | return error_mark_node; | |
6991 | ||
6992 | /* As an optimization, we avoid regenerating the array type if | |
6993 | it will obviously be the same as T. */ | |
8d08fdba MS |
6994 | if (type == TREE_TYPE (t) && domain == TYPE_DOMAIN (t)) |
6995 | return t; | |
0ecfe0b4 | 6996 | |
4393e105 MM |
6997 | /* These checks should match the ones in grokdeclarator. |
6998 | ||
6999 | [temp.deduct] | |
7000 | ||
7001 | The deduction may fail for any of the following reasons: | |
7002 | ||
7003 | -- Attempting to create an array with an element type that | |
7004 | is void, a function type, or a reference type. */ | |
7005 | if (TREE_CODE (type) == VOID_TYPE | |
7006 | || TREE_CODE (type) == FUNCTION_TYPE | |
7007 | || TREE_CODE (type) == REFERENCE_TYPE) | |
0ecfe0b4 | 7008 | { |
c2ea3a40 | 7009 | if (complain & tf_error) |
33bd39a2 | 7010 | error ("creating array of `%T'", type); |
4393e105 | 7011 | return error_mark_node; |
0ecfe0b4 JM |
7012 | } |
7013 | ||
8d08fdba MS |
7014 | r = build_cplus_array_type (type, domain); |
7015 | return r; | |
7016 | } | |
7017 | ||
8d08fdba | 7018 | case PLUS_EXPR: |
5566b478 | 7019 | case MINUS_EXPR: |
4393e105 | 7020 | { |
c2ea3a40 NS |
7021 | tree e1 = tsubst (TREE_OPERAND (t, 0), args, complain, in_decl); |
7022 | tree e2 = tsubst (TREE_OPERAND (t, 1), args, complain, in_decl); | |
4393e105 MM |
7023 | |
7024 | if (e1 == error_mark_node || e2 == error_mark_node) | |
7025 | return error_mark_node; | |
7026 | ||
7027 | return fold (build (TREE_CODE (t), TREE_TYPE (t), e1, e2)); | |
7028 | } | |
8d08fdba MS |
7029 | |
7030 | case NEGATE_EXPR: | |
7031 | case NOP_EXPR: | |
4393e105 | 7032 | { |
c2ea3a40 | 7033 | tree e = tsubst (TREE_OPERAND (t, 0), args, complain, in_decl); |
4393e105 MM |
7034 | if (e == error_mark_node) |
7035 | return error_mark_node; | |
7036 | ||
7037 | return fold (build (TREE_CODE (t), TREE_TYPE (t), e)); | |
7038 | } | |
8d08fdba | 7039 | |
5566b478 MS |
7040 | case TYPENAME_TYPE: |
7041 | { | |
4393e105 MM |
7042 | tree ctx = tsubst_aggr_type (TYPE_CONTEXT (t), args, complain, |
7043 | in_decl, /*entering_scope=*/1); | |
7044 | tree f = tsubst_copy (TYPENAME_TYPE_FULLNAME (t), args, | |
7045 | complain, in_decl); | |
7046 | ||
7047 | if (ctx == error_mark_node || f == error_mark_node) | |
7048 | return error_mark_node; | |
ae58fa02 | 7049 | |
bf8f3f93 MM |
7050 | if (!IS_AGGR_TYPE (ctx)) |
7051 | { | |
c2ea3a40 | 7052 | if (complain & tf_error) |
33bd39a2 | 7053 | error ("`%T' is not a class, struct, or union type", |
bf8f3f93 MM |
7054 | ctx); |
7055 | return error_mark_node; | |
7056 | } | |
7057 | else if (!uses_template_parms (ctx) && !TYPE_BEING_DEFINED (ctx)) | |
7058 | { | |
7059 | /* Normally, make_typename_type does not require that the CTX | |
7060 | have complete type in order to allow things like: | |
ae58fa02 | 7061 | |
bf8f3f93 | 7062 | template <class T> struct S { typename S<T>::X Y; }; |
ae58fa02 | 7063 | |
bf8f3f93 MM |
7064 | But, such constructs have already been resolved by this |
7065 | point, so here CTX really should have complete type, unless | |
7066 | it's a partial instantiation. */ | |
4393e105 | 7067 | ctx = complete_type (ctx); |
d0f062fb | 7068 | if (!COMPLETE_TYPE_P (ctx)) |
4393e105 | 7069 | { |
c2ea3a40 | 7070 | if (complain & tf_error) |
7a228918 | 7071 | cxx_incomplete_type_error (NULL_TREE, ctx); |
4393e105 MM |
7072 | return error_mark_node; |
7073 | } | |
7074 | } | |
ae58fa02 | 7075 | |
4f2b0fb2 NS |
7076 | f = make_typename_type (ctx, f, |
7077 | (complain & tf_error) | tf_keep_type_decl); | |
f0bcd168 MM |
7078 | if (f == error_mark_node) |
7079 | return f; | |
4f2b0fb2 NS |
7080 | if (TREE_CODE (f) == TYPE_DECL) |
7081 | { | |
7082 | complain |= tf_ignore_bad_quals; | |
7083 | f = TREE_TYPE (f); | |
7084 | } | |
7085 | ||
7086 | return cp_build_qualified_type_real | |
7087 | (f, cp_type_quals (f) | cp_type_quals (t), complain); | |
5566b478 | 7088 | } |
c2ea3a40 | 7089 | |
b8c6534b KL |
7090 | case UNBOUND_CLASS_TEMPLATE: |
7091 | { | |
7092 | tree ctx = tsubst_aggr_type (TYPE_CONTEXT (t), args, complain, | |
7093 | in_decl, /*entering_scope=*/1); | |
7094 | tree name = TYPE_IDENTIFIER (t); | |
7095 | ||
7096 | if (ctx == error_mark_node || name == error_mark_node) | |
7097 | return error_mark_node; | |
7098 | ||
7099 | return make_unbound_class_template (ctx, name, complain); | |
7100 | } | |
7101 | ||
5566b478 | 7102 | case INDIRECT_REF: |
4393e105 | 7103 | { |
c2ea3a40 | 7104 | tree e = tsubst (TREE_OPERAND (t, 0), args, complain, in_decl); |
4393e105 MM |
7105 | if (e == error_mark_node) |
7106 | return error_mark_node; | |
7107 | return make_pointer_declarator (type, e); | |
7108 | } | |
7109 | ||
5566b478 | 7110 | case ADDR_EXPR: |
4393e105 | 7111 | { |
c2ea3a40 | 7112 | tree e = tsubst (TREE_OPERAND (t, 0), args, complain, in_decl); |
4393e105 MM |
7113 | if (e == error_mark_node) |
7114 | return error_mark_node; | |
7115 | return make_reference_declarator (type, e); | |
7116 | } | |
5566b478 MS |
7117 | |
7118 | case ARRAY_REF: | |
4393e105 | 7119 | { |
c2ea3a40 NS |
7120 | tree e1 = tsubst (TREE_OPERAND (t, 0), args, complain, in_decl); |
7121 | tree e2 = tsubst_expr (TREE_OPERAND (t, 1), args, complain, in_decl); | |
4393e105 MM |
7122 | if (e1 == error_mark_node || e2 == error_mark_node) |
7123 | return error_mark_node; | |
7124 | ||
718b8ea5 | 7125 | return build_nt (ARRAY_REF, e1, e2, tsubst_expr); |
4393e105 | 7126 | } |
5566b478 MS |
7127 | |
7128 | case CALL_EXPR: | |
4393e105 | 7129 | { |
c2ea3a40 | 7130 | tree e1 = tsubst (TREE_OPERAND (t, 0), args, complain, in_decl); |
43f887f9 MM |
7131 | tree e2 = (tsubst_call_declarator_parms |
7132 | (CALL_DECLARATOR_PARMS (t), args, complain, in_decl)); | |
7133 | tree e3 = tsubst (CALL_DECLARATOR_EXCEPTION_SPEC (t), args, | |
7134 | complain, in_decl); | |
4393e105 MM |
7135 | |
7136 | if (e1 == error_mark_node || e2 == error_mark_node | |
7137 | || e3 == error_mark_node) | |
7138 | return error_mark_node; | |
7139 | ||
43f887f9 | 7140 | return make_call_declarator (e1, e2, CALL_DECLARATOR_QUALS (t), e3); |
4393e105 | 7141 | } |
5566b478 | 7142 | |
fc378698 | 7143 | case SCOPE_REF: |
4393e105 | 7144 | { |
c2ea3a40 | 7145 | tree e1 = tsubst (TREE_OPERAND (t, 0), args, complain, in_decl); |
4393e105 MM |
7146 | tree e2 = tsubst (TREE_OPERAND (t, 1), args, complain, in_decl); |
7147 | if (e1 == error_mark_node || e2 == error_mark_node) | |
7148 | return error_mark_node; | |
7149 | ||
718b8ea5 | 7150 | return build_nt (TREE_CODE (t), e1, e2); |
4393e105 | 7151 | } |
fc378698 | 7152 | |
b894fc05 | 7153 | case TYPEOF_TYPE: |
4393e105 | 7154 | { |
c2ea3a40 | 7155 | tree e1 = tsubst_expr (TYPE_FIELDS (t), args, complain, in_decl); |
4393e105 MM |
7156 | if (e1 == error_mark_node) |
7157 | return error_mark_node; | |
7158 | ||
7159 | return TREE_TYPE (e1); | |
7160 | } | |
b894fc05 | 7161 | |
8d08fdba | 7162 | default: |
5566b478 | 7163 | sorry ("use of `%s' in template", |
8d08fdba MS |
7164 | tree_code_name [(int) TREE_CODE (t)]); |
7165 | return error_mark_node; | |
7166 | } | |
7167 | } | |
7168 | ||
00d3396f JM |
7169 | /* Like tsubst, but deals with expressions. This function just replaces |
7170 | template parms; to finish processing the resultant expression, use | |
7171 | tsubst_expr. */ | |
7172 | ||
14d22dd6 | 7173 | static tree |
4393e105 | 7174 | tsubst_copy (t, args, complain, in_decl) |
98c1c668 | 7175 | tree t, args; |
c2ea3a40 | 7176 | tsubst_flags_t complain; |
5566b478 MS |
7177 | tree in_decl; |
7178 | { | |
7179 | enum tree_code code; | |
8452b1d3 | 7180 | tree r; |
8d08fdba | 7181 | |
5566b478 MS |
7182 | if (t == NULL_TREE || t == error_mark_node) |
7183 | return t; | |
7184 | ||
7185 | code = TREE_CODE (t); | |
b7484fbe | 7186 | |
5566b478 MS |
7187 | switch (code) |
7188 | { | |
7189 | case PARM_DECL: | |
a723baf1 MM |
7190 | r = retrieve_local_specialization (t); |
7191 | my_friendly_assert (r != NULL, 20020903); | |
7192 | return r; | |
5566b478 MS |
7193 | |
7194 | case CONST_DECL: | |
ed44da02 MM |
7195 | { |
7196 | tree enum_type; | |
7197 | tree v; | |
7198 | ||
a723baf1 MM |
7199 | if (DECL_TEMPLATE_PARM_P (t)) |
7200 | return tsubst_copy (DECL_INITIAL (t), args, complain, in_decl); | |
ed44da02 MM |
7201 | if (!DECL_CONTEXT (t)) |
7202 | /* This is a global enumeration constant. */ | |
7203 | return t; | |
7204 | ||
7205 | /* Unfortunately, we cannot just call lookup_name here. | |
9188c363 MM |
7206 | Consider: |
7207 | ||
7208 | template <int I> int f() { | |
7209 | enum E { a = I }; | |
7210 | struct S { void g() { E e = a; } }; | |
7211 | }; | |
7212 | ||
7213 | When we instantiate f<7>::S::g(), say, lookup_name is not | |
7214 | clever enough to find f<7>::a. */ | |
ed44da02 | 7215 | enum_type |
4393e105 | 7216 | = tsubst_aggr_type (TREE_TYPE (t), args, complain, in_decl, |
ed44da02 MM |
7217 | /*entering_scope=*/0); |
7218 | ||
7219 | for (v = TYPE_VALUES (enum_type); | |
7220 | v != NULL_TREE; | |
7221 | v = TREE_CHAIN (v)) | |
7222 | if (TREE_PURPOSE (v) == DECL_NAME (t)) | |
7223 | return TREE_VALUE (v); | |
7224 | ||
7225 | /* We didn't find the name. That should never happen; if | |
7226 | name-lookup found it during preliminary parsing, we | |
7227 | should find it again here during instantiation. */ | |
a98facb0 | 7228 | abort (); |
ed44da02 | 7229 | } |
db04386f | 7230 | return t; |
ed44da02 | 7231 | |
5566b478 MS |
7232 | case FIELD_DECL: |
7233 | if (DECL_CONTEXT (t)) | |
7234 | { | |
0978790f | 7235 | tree ctx; |
0978790f | 7236 | |
4393e105 | 7237 | ctx = tsubst_aggr_type (DECL_CONTEXT (t), args, complain, in_decl, |
36a117a5 | 7238 | /*entering_scope=*/1); |
0978790f | 7239 | if (ctx != DECL_CONTEXT (t)) |
86ac0575 | 7240 | return lookup_field (ctx, DECL_NAME (t), 0, false); |
5566b478 MS |
7241 | } |
7242 | return t; | |
7243 | ||
7244 | case VAR_DECL: | |
7245 | case FUNCTION_DECL: | |
a723baf1 MM |
7246 | if ((DECL_LANG_SPECIFIC (t) && DECL_TEMPLATE_INFO (t)) |
7247 | || local_variable_p (t)) | |
4393e105 | 7248 | t = tsubst (t, args, complain, in_decl); |
5566b478 MS |
7249 | mark_used (t); |
7250 | return t; | |
7251 | ||
a723baf1 MM |
7252 | case BASELINK: |
7253 | { | |
7254 | tree name; | |
7255 | tree qualifying_scope; | |
7256 | tree fns; | |
dd1b7476 | 7257 | tree template_args = 0; |
a723baf1 MM |
7258 | bool template_id_p = false; |
7259 | ||
7260 | /* A baselink indicates a function from a base class. The | |
7261 | BASELINK_ACCESS_BINFO and BASELINK_BINFO are going to have | |
7262 | non-dependent types; otherwise, the lookup could not have | |
7263 | succeeded. However, they may indicate bases of the template | |
7264 | class, rather than the instantiated class. | |
7265 | ||
7266 | In addition, lookups that were not ambiguous before may be | |
7267 | ambiguous now. Therefore, we perform the lookup again. */ | |
7268 | qualifying_scope = BINFO_TYPE (BASELINK_ACCESS_BINFO (t)); | |
7269 | fns = BASELINK_FUNCTIONS (t); | |
7270 | if (TREE_CODE (fns) == TEMPLATE_ID_EXPR) | |
7271 | { | |
7272 | template_id_p = true; | |
7273 | template_args = TREE_OPERAND (fns, 1); | |
7274 | fns = TREE_OPERAND (fns, 0); | |
bd83b409 NS |
7275 | template_args = tsubst_copy (template_args, args, |
7276 | complain, in_decl); | |
7277 | maybe_fold_nontype_args (template_args); | |
a723baf1 MM |
7278 | } |
7279 | name = DECL_NAME (get_first_fn (fns)); | |
7280 | t = lookup_fnfields (qualifying_scope, name, /*protect=*/1); | |
7281 | if (BASELINK_P (t) && template_id_p) | |
7282 | BASELINK_FUNCTIONS (t) | |
7283 | = build_nt (TEMPLATE_ID_EXPR, | |
7284 | BASELINK_FUNCTIONS (t), | |
7285 | template_args); | |
7286 | return adjust_result_of_qualified_name_lookup (t, | |
7287 | qualifying_scope, | |
7288 | current_class_type); | |
7289 | } | |
7290 | ||
98c1c668 | 7291 | case TEMPLATE_DECL: |
a723baf1 MM |
7292 | if (DECL_TEMPLATE_TEMPLATE_PARM_P (t)) |
7293 | return tsubst (TREE_TYPE (DECL_TEMPLATE_RESULT (t)), | |
7294 | args, complain, in_decl); | |
7295 | else if (is_member_template (t)) | |
4393e105 | 7296 | return tsubst (t, args, complain, in_decl); |
98c1c668 JM |
7297 | else |
7298 | return t; | |
7299 | ||
672476cb MM |
7300 | case LOOKUP_EXPR: |
7301 | { | |
9da99f7d | 7302 | /* We must tsubst into a LOOKUP_EXPR in case the names to |
672476cb MM |
7303 | which it refers is a conversion operator; in that case the |
7304 | name will change. We avoid making unnecessary copies, | |
7305 | however. */ | |
7306 | ||
4393e105 | 7307 | tree id = tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl); |
672476cb MM |
7308 | |
7309 | if (id != TREE_OPERAND (t, 0)) | |
7310 | { | |
8452b1d3 | 7311 | r = build_nt (LOOKUP_EXPR, id); |
672476cb MM |
7312 | LOOKUP_EXPR_GLOBAL (r) = LOOKUP_EXPR_GLOBAL (t); |
7313 | t = r; | |
7314 | } | |
7315 | ||
7316 | return t; | |
7317 | } | |
7318 | ||
5566b478 MS |
7319 | case CAST_EXPR: |
7320 | case REINTERPRET_CAST_EXPR: | |
e92cc029 MS |
7321 | case CONST_CAST_EXPR: |
7322 | case STATIC_CAST_EXPR: | |
7323 | case DYNAMIC_CAST_EXPR: | |
51924768 | 7324 | case NOP_EXPR: |
5566b478 | 7325 | return build1 |
4393e105 MM |
7326 | (code, tsubst (TREE_TYPE (t), args, complain, in_decl), |
7327 | tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl)); | |
5566b478 MS |
7328 | |
7329 | case INDIRECT_REF: | |
5566b478 MS |
7330 | case NEGATE_EXPR: |
7331 | case TRUTH_NOT_EXPR: | |
b87692e5 | 7332 | case BIT_NOT_EXPR: |
5566b478 MS |
7333 | case ADDR_EXPR: |
7334 | case CONVERT_EXPR: /* Unary + */ | |
7335 | case SIZEOF_EXPR: | |
abff8e06 | 7336 | case ALIGNOF_EXPR: |
5566b478 | 7337 | case ARROW_EXPR: |
fc378698 | 7338 | case THROW_EXPR: |
5156628f | 7339 | case TYPEID_EXPR: |
f5733617 SS |
7340 | case REALPART_EXPR: |
7341 | case IMAGPART_EXPR: | |
5566b478 | 7342 | return build1 |
6a629cac | 7343 | (code, tsubst (TREE_TYPE (t), args, complain, in_decl), |
4393e105 | 7344 | tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl)); |
5566b478 | 7345 | |
a723baf1 MM |
7346 | case COMPONENT_REF: |
7347 | { | |
7348 | tree object; | |
7349 | tree name; | |
7350 | ||
7351 | object = tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl); | |
7352 | name = TREE_OPERAND (t, 1); | |
7353 | if (TREE_CODE (name) == BIT_NOT_EXPR) | |
7354 | { | |
7355 | name = tsubst_copy (TREE_OPERAND (name, 0), args, | |
7356 | complain, in_decl); | |
7357 | name = build1 (BIT_NOT_EXPR, NULL_TREE, name); | |
7358 | } | |
7359 | else if (TREE_CODE (name) == SCOPE_REF | |
7360 | && TREE_CODE (TREE_OPERAND (name, 1)) == BIT_NOT_EXPR) | |
7361 | { | |
7362 | tree base = tsubst_copy (TREE_OPERAND (name, 0), args, | |
7363 | complain, in_decl); | |
7364 | name = TREE_OPERAND (name, 1); | |
7365 | name = tsubst_copy (TREE_OPERAND (name, 0), args, | |
7366 | complain, in_decl); | |
7367 | name = build1 (BIT_NOT_EXPR, NULL_TREE, name); | |
7368 | name = build_nt (SCOPE_REF, base, name); | |
7369 | } | |
7370 | else | |
7371 | name = tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl); | |
7372 | return build_nt (COMPONENT_REF, object, name); | |
7373 | } | |
7374 | ||
5566b478 MS |
7375 | case PLUS_EXPR: |
7376 | case MINUS_EXPR: | |
7377 | case MULT_EXPR: | |
7378 | case TRUNC_DIV_EXPR: | |
7379 | case CEIL_DIV_EXPR: | |
7380 | case FLOOR_DIV_EXPR: | |
7381 | case ROUND_DIV_EXPR: | |
7382 | case EXACT_DIV_EXPR: | |
7383 | case BIT_AND_EXPR: | |
7384 | case BIT_ANDTC_EXPR: | |
7385 | case BIT_IOR_EXPR: | |
7386 | case BIT_XOR_EXPR: | |
7387 | case TRUNC_MOD_EXPR: | |
7388 | case FLOOR_MOD_EXPR: | |
7389 | case TRUTH_ANDIF_EXPR: | |
7390 | case TRUTH_ORIF_EXPR: | |
7391 | case TRUTH_AND_EXPR: | |
7392 | case TRUTH_OR_EXPR: | |
7393 | case RSHIFT_EXPR: | |
7394 | case LSHIFT_EXPR: | |
7395 | case RROTATE_EXPR: | |
7396 | case LROTATE_EXPR: | |
7397 | case EQ_EXPR: | |
7398 | case NE_EXPR: | |
7399 | case MAX_EXPR: | |
7400 | case MIN_EXPR: | |
7401 | case LE_EXPR: | |
7402 | case GE_EXPR: | |
7403 | case LT_EXPR: | |
7404 | case GT_EXPR: | |
5566b478 MS |
7405 | case ARRAY_REF: |
7406 | case COMPOUND_EXPR: | |
7407 | case SCOPE_REF: | |
7408 | case DOTSTAR_EXPR: | |
7409 | case MEMBER_REF: | |
519c9806 MM |
7410 | case PREDECREMENT_EXPR: |
7411 | case PREINCREMENT_EXPR: | |
7412 | case POSTDECREMENT_EXPR: | |
7413 | case POSTINCREMENT_EXPR: | |
5566b478 | 7414 | return build_nt |
4393e105 MM |
7415 | (code, tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl), |
7416 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl)); | |
5566b478 MS |
7417 | |
7418 | case CALL_EXPR: | |
a723baf1 MM |
7419 | return build_nt (code, |
7420 | tsubst_copy (TREE_OPERAND (t, 0), args, | |
7421 | complain, in_decl), | |
7422 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, | |
7423 | in_decl), | |
7424 | NULL_TREE); | |
5566b478 MS |
7425 | |
7426 | case METHOD_CALL_EXPR: | |
a723baf1 MM |
7427 | return build_nt |
7428 | (code, | |
7429 | tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl), | |
7430 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl), | |
7431 | tsubst_copy (TREE_OPERAND (t, 2), args, complain, in_decl), | |
7432 | NULL_TREE); | |
5566b478 | 7433 | |
558475f0 | 7434 | case STMT_EXPR: |
cc23546e | 7435 | /* This processing should really occur in tsubst_expr. However, |
558475f0 | 7436 | tsubst_expr does not recurse into expressions, since it |
cc23546e JO |
7437 | assumes that there aren't any statements inside them. So, we |
7438 | need to expand the STMT_EXPR here. */ | |
558475f0 MM |
7439 | if (!processing_template_decl) |
7440 | { | |
b5ac18ea | 7441 | tree stmt_expr = begin_stmt_expr (); |
c2ea3a40 | 7442 | tsubst_expr (STMT_EXPR_STMT (t), args, complain, in_decl); |
b5ac18ea | 7443 | return finish_stmt_expr (stmt_expr); |
558475f0 | 7444 | } |
9d9169de MM |
7445 | |
7446 | return t; | |
558475f0 | 7447 | |
5566b478 MS |
7448 | case COND_EXPR: |
7449 | case MODOP_EXPR: | |
40242ccf | 7450 | case PSEUDO_DTOR_EXPR: |
67da3287 | 7451 | { |
8452b1d3 | 7452 | r = build_nt |
4393e105 MM |
7453 | (code, tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl), |
7454 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl), | |
7455 | tsubst_copy (TREE_OPERAND (t, 2), args, complain, in_decl)); | |
67da3287 MM |
7456 | return r; |
7457 | } | |
5566b478 MS |
7458 | |
7459 | case NEW_EXPR: | |
7460 | { | |
8452b1d3 | 7461 | r = build_nt |
4393e105 MM |
7462 | (code, tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl), |
7463 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl), | |
7464 | tsubst_copy (TREE_OPERAND (t, 2), args, complain, in_decl)); | |
5566b478 MS |
7465 | NEW_EXPR_USE_GLOBAL (r) = NEW_EXPR_USE_GLOBAL (t); |
7466 | return r; | |
7467 | } | |
7468 | ||
7469 | case DELETE_EXPR: | |
7470 | { | |
8452b1d3 | 7471 | r = build_nt |
4393e105 MM |
7472 | (code, tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl), |
7473 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl)); | |
5566b478 MS |
7474 | DELETE_EXPR_USE_GLOBAL (r) = DELETE_EXPR_USE_GLOBAL (t); |
7475 | DELETE_EXPR_USE_VEC (r) = DELETE_EXPR_USE_VEC (t); | |
7476 | return r; | |
7477 | } | |
7478 | ||
386b8a85 JM |
7479 | case TEMPLATE_ID_EXPR: |
7480 | { | |
00d3396f | 7481 | /* Substituted template arguments */ |
4393e105 MM |
7482 | tree targs = tsubst_copy (TREE_OPERAND (t, 1), args, complain, |
7483 | in_decl); | |
856216bb | 7484 | |
bd83b409 | 7485 | maybe_fold_nontype_args (targs); |
00d3396f | 7486 | return lookup_template_function |
4393e105 | 7487 | (tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl), targs); |
386b8a85 JM |
7488 | } |
7489 | ||
5566b478 MS |
7490 | case TREE_LIST: |
7491 | { | |
7492 | tree purpose, value, chain; | |
7493 | ||
7494 | if (t == void_list_node) | |
7495 | return t; | |
7496 | ||
7497 | purpose = TREE_PURPOSE (t); | |
7498 | if (purpose) | |
4393e105 | 7499 | purpose = tsubst_copy (purpose, args, complain, in_decl); |
5566b478 MS |
7500 | value = TREE_VALUE (t); |
7501 | if (value) | |
4393e105 | 7502 | value = tsubst_copy (value, args, complain, in_decl); |
5566b478 MS |
7503 | chain = TREE_CHAIN (t); |
7504 | if (chain && chain != void_type_node) | |
4393e105 | 7505 | chain = tsubst_copy (chain, args, complain, in_decl); |
5566b478 MS |
7506 | if (purpose == TREE_PURPOSE (t) |
7507 | && value == TREE_VALUE (t) | |
7508 | && chain == TREE_CHAIN (t)) | |
7509 | return t; | |
7510 | return tree_cons (purpose, value, chain); | |
7511 | } | |
7512 | ||
7513 | case RECORD_TYPE: | |
7514 | case UNION_TYPE: | |
7515 | case ENUMERAL_TYPE: | |
7516 | case INTEGER_TYPE: | |
7517 | case TEMPLATE_TYPE_PARM: | |
73b0fce8 | 7518 | case TEMPLATE_TEMPLATE_PARM: |
a1281f45 | 7519 | case BOUND_TEMPLATE_TEMPLATE_PARM: |
f84b4be9 | 7520 | case TEMPLATE_PARM_INDEX: |
5566b478 MS |
7521 | case POINTER_TYPE: |
7522 | case REFERENCE_TYPE: | |
7523 | case OFFSET_TYPE: | |
7524 | case FUNCTION_TYPE: | |
7525 | case METHOD_TYPE: | |
7526 | case ARRAY_TYPE: | |
7527 | case TYPENAME_TYPE: | |
b8c6534b | 7528 | case UNBOUND_CLASS_TEMPLATE: |
2a2b1d56 | 7529 | case TYPEOF_TYPE: |
f84b4be9 | 7530 | case TYPE_DECL: |
4393e105 | 7531 | return tsubst (t, args, complain, in_decl); |
5566b478 | 7532 | |
e92cc029 | 7533 | case IDENTIFIER_NODE: |
421844e7 | 7534 | if (IDENTIFIER_TYPENAME_P (t)) |
1f6e1acc AS |
7535 | { |
7536 | tree new_type = tsubst (TREE_TYPE (t), args, complain, in_decl); | |
1f84ec23 | 7537 | return mangle_conv_op_name_for_type (new_type); |
1f6e1acc | 7538 | } |
e92cc029 MS |
7539 | else |
7540 | return t; | |
7541 | ||
5156628f | 7542 | case CONSTRUCTOR: |
8452b1d3 | 7543 | { |
dcf92453 ZW |
7544 | r = build_constructor |
7545 | (tsubst (TREE_TYPE (t), args, complain, in_decl), | |
7546 | tsubst_copy (CONSTRUCTOR_ELTS (t), args, complain, in_decl)); | |
8452b1d3 JM |
7547 | TREE_HAS_CONSTRUCTOR (r) = TREE_HAS_CONSTRUCTOR (t); |
7548 | return r; | |
7549 | } | |
5156628f | 7550 | |
371534a9 | 7551 | case VA_ARG_EXPR: |
ea333e1c | 7552 | return build_x_va_arg (tsubst_copy (TREE_OPERAND (t, 0), args, complain, |
c2ea3a40 NS |
7553 | in_decl), |
7554 | tsubst (TREE_TYPE (t), args, complain, in_decl)); | |
f9817201 | 7555 | |
5566b478 MS |
7556 | default: |
7557 | return t; | |
7558 | } | |
7559 | } | |
7560 | ||
cc23546e JO |
7561 | /* Like tsubst_copy for expressions, etc. but also does semantic |
7562 | processing. */ | |
00d3396f | 7563 | |
14d22dd6 | 7564 | static tree |
4393e105 | 7565 | tsubst_expr (t, args, complain, in_decl) |
98c1c668 | 7566 | tree t, args; |
c2ea3a40 | 7567 | tsubst_flags_t complain; |
5566b478 MS |
7568 | tree in_decl; |
7569 | { | |
fd10dd09 | 7570 | tree stmt, tmp; |
558475f0 | 7571 | |
5566b478 MS |
7572 | if (t == NULL_TREE || t == error_mark_node) |
7573 | return t; | |
7574 | ||
5156628f | 7575 | if (processing_template_decl) |
4393e105 | 7576 | return tsubst_copy (t, args, complain, in_decl); |
5566b478 | 7577 | |
009ed910 | 7578 | if (!STATEMENT_CODE_P (TREE_CODE (t))) |
cc23546e | 7579 | return tsubst_copy_and_build (t, args, complain, in_decl); |
fd10dd09 | 7580 | |
5566b478 | 7581 | switch (TREE_CODE (t)) |
8d08fdba | 7582 | { |
558475f0 | 7583 | case CTOR_INITIALIZER: |
2282d28d MM |
7584 | prep_stmt (t); |
7585 | finish_mem_initializers (tsubst_initializer_list | |
7586 | (TREE_OPERAND (t, 0), args)); | |
7587 | break; | |
558475f0 | 7588 | |
5566b478 | 7589 | case RETURN_STMT: |
a7e4cfa0 | 7590 | prep_stmt (t); |
d65b1d77 | 7591 | finish_return_stmt (tsubst_expr (RETURN_STMT_EXPR (t), |
4393e105 | 7592 | args, complain, in_decl)); |
5566b478 MS |
7593 | break; |
7594 | ||
7595 | case EXPR_STMT: | |
a7e4cfa0 | 7596 | prep_stmt (t); |
ad321293 | 7597 | finish_expr_stmt (tsubst_expr (EXPR_STMT_EXPR (t), |
4393e105 | 7598 | args, complain, in_decl)); |
5566b478 MS |
7599 | break; |
7600 | ||
9da99f7d NS |
7601 | case USING_STMT: |
7602 | prep_stmt (t); | |
7603 | do_using_directive (tsubst_expr (USING_STMT_NAMESPACE (t), | |
7604 | args, complain, in_decl)); | |
7605 | break; | |
7606 | ||
5566b478 MS |
7607 | case DECL_STMT: |
7608 | { | |
e0942dcd MM |
7609 | tree decl; |
7610 | tree init; | |
5566b478 | 7611 | |
a7e4cfa0 | 7612 | prep_stmt (t); |
e0942dcd | 7613 | decl = DECL_STMT_DECL (t); |
acef433b MM |
7614 | if (TREE_CODE (decl) == LABEL_DECL) |
7615 | finish_label_decl (DECL_NAME (decl)); | |
fbfe8c9e NS |
7616 | else if (TREE_CODE (decl) == USING_DECL) |
7617 | { | |
7618 | tree scope = DECL_INITIAL (decl); | |
7619 | tree name = DECL_NAME (decl); | |
7620 | ||
7621 | scope = tsubst_expr (scope, args, complain, in_decl); | |
a723baf1 MM |
7622 | do_local_using_decl (lookup_qualified_name (scope, |
7623 | name, | |
7624 | /*is_type_p=*/0, | |
7625 | /*flags=*/0)); | |
fbfe8c9e | 7626 | } |
acef433b MM |
7627 | else |
7628 | { | |
7629 | init = DECL_INITIAL (decl); | |
7630 | decl = tsubst (decl, args, complain, in_decl); | |
ce2e5191 NS |
7631 | if (decl != error_mark_node) |
7632 | { | |
7633 | if (init) | |
7634 | DECL_INITIAL (decl) = error_mark_node; | |
7635 | /* By marking the declaration as instantiated, we avoid | |
7636 | trying to instantiate it. Since instantiate_decl can't | |
7637 | handle local variables, and since we've already done | |
7638 | all that needs to be done, that's the right thing to | |
7639 | do. */ | |
7640 | if (TREE_CODE (decl) == VAR_DECL) | |
7641 | DECL_TEMPLATE_INSTANTIATED (decl) = 1; | |
edebf865 MM |
7642 | if (TREE_CODE (decl) == VAR_DECL |
7643 | && ANON_AGGR_TYPE_P (TREE_TYPE (decl))) | |
7644 | /* Anonymous aggregates are a special case. */ | |
7645 | finish_anon_union (decl); | |
7646 | else | |
ed2fa432 | 7647 | { |
edebf865 MM |
7648 | maybe_push_decl (decl); |
7649 | if (DECL_PRETTY_FUNCTION_P (decl)) | |
7650 | { | |
7651 | /* For __PRETTY_FUNCTION__ we have to adjust the | |
7652 | initializer. */ | |
7653 | const char *const name | |
7654 | = cxx_printable_name (current_function_decl, 2); | |
7655 | init = cp_fname_init (name); | |
7656 | TREE_TYPE (decl) = TREE_TYPE (init); | |
7657 | } | |
7658 | else | |
7659 | init = tsubst_expr (init, args, complain, in_decl); | |
7660 | cp_finish_decl (decl, init, NULL_TREE, 0); | |
ed2fa432 | 7661 | } |
ce2e5191 | 7662 | } |
acef433b | 7663 | } |
fd10dd09 JM |
7664 | |
7665 | /* A DECL_STMT can also be used as an expression, in the condition | |
27631dae | 7666 | clause of an if/for/while construct. If we aren't followed by |
fd10dd09 JM |
7667 | another statement, return our decl. */ |
7668 | if (TREE_CHAIN (t) == NULL_TREE) | |
7669 | return decl; | |
5566b478 | 7670 | } |
fd10dd09 | 7671 | break; |
8d08fdba | 7672 | |
5566b478 MS |
7673 | case FOR_STMT: |
7674 | { | |
a7e4cfa0 | 7675 | prep_stmt (t); |
5566b478 | 7676 | |
558475f0 | 7677 | stmt = begin_for_stmt (); |
fd10dd09 | 7678 | tsubst_expr (FOR_INIT_STMT (t), args, complain, in_decl); |
558475f0 | 7679 | finish_for_init_stmt (stmt); |
c2ea3a40 NS |
7680 | finish_for_cond (tsubst_expr (FOR_COND (t), |
7681 | args, complain, in_decl), | |
558475f0 | 7682 | stmt); |
4393e105 | 7683 | tmp = tsubst_expr (FOR_EXPR (t), args, complain, in_decl); |
558475f0 | 7684 | finish_for_expr (tmp, stmt); |
4393e105 | 7685 | tsubst_expr (FOR_BODY (t), args, complain, in_decl); |
35b1567d | 7686 | finish_for_stmt (stmt); |
5566b478 MS |
7687 | } |
7688 | break; | |
8d08fdba | 7689 | |
5566b478 MS |
7690 | case WHILE_STMT: |
7691 | { | |
a7e4cfa0 | 7692 | prep_stmt (t); |
558475f0 | 7693 | stmt = begin_while_stmt (); |
ad321293 | 7694 | finish_while_stmt_cond (tsubst_expr (WHILE_COND (t), |
4393e105 | 7695 | args, complain, in_decl), |
558475f0 | 7696 | stmt); |
4393e105 | 7697 | tsubst_expr (WHILE_BODY (t), args, complain, in_decl); |
558475f0 | 7698 | finish_while_stmt (stmt); |
5566b478 MS |
7699 | } |
7700 | break; | |
8d08fdba | 7701 | |
5566b478 MS |
7702 | case DO_STMT: |
7703 | { | |
a7e4cfa0 | 7704 | prep_stmt (t); |
558475f0 | 7705 | stmt = begin_do_stmt (); |
4393e105 | 7706 | tsubst_expr (DO_BODY (t), args, complain, in_decl); |
558475f0 | 7707 | finish_do_body (stmt); |
c2ea3a40 NS |
7708 | finish_do_stmt (tsubst_expr (DO_COND (t), |
7709 | args, complain, in_decl), | |
558475f0 | 7710 | stmt); |
5566b478 MS |
7711 | } |
7712 | break; | |
a0a33927 | 7713 | |
5566b478 | 7714 | case IF_STMT: |
8d08fdba | 7715 | { |
a7e4cfa0 | 7716 | prep_stmt (t); |
558475f0 | 7717 | stmt = begin_if_stmt (); |
ad321293 | 7718 | finish_if_stmt_cond (tsubst_expr (IF_COND (t), |
4393e105 | 7719 | args, complain, in_decl), |
558475f0 | 7720 | stmt); |
db5ae43f | 7721 | |
ad321293 | 7722 | if (tmp = THEN_CLAUSE (t), tmp) |
db5ae43f | 7723 | { |
4393e105 | 7724 | tsubst_expr (tmp, args, complain, in_decl); |
558475f0 | 7725 | finish_then_clause (stmt); |
db5ae43f MS |
7726 | } |
7727 | ||
ad321293 MM |
7728 | if (tmp = ELSE_CLAUSE (t), tmp) |
7729 | { | |
7730 | begin_else_clause (); | |
4393e105 | 7731 | tsubst_expr (tmp, args, complain, in_decl); |
558475f0 | 7732 | finish_else_clause (stmt); |
ad321293 | 7733 | } |
8d08fdba | 7734 | |
ad321293 | 7735 | finish_if_stmt (); |
8d08fdba | 7736 | } |
5566b478 | 7737 | break; |
8d08fdba | 7738 | |
5566b478 MS |
7739 | case COMPOUND_STMT: |
7740 | { | |
a7e4cfa0 | 7741 | prep_stmt (t); |
ade3dc07 JM |
7742 | if (COMPOUND_STMT_BODY_BLOCK (t)) |
7743 | stmt = begin_function_body (); | |
7744 | else | |
7745 | stmt = begin_compound_stmt (COMPOUND_STMT_NO_SCOPE (t)); | |
7746 | ||
fd10dd09 | 7747 | tsubst_expr (COMPOUND_BODY (t), args, complain, in_decl); |
ade3dc07 JM |
7748 | |
7749 | if (COMPOUND_STMT_BODY_BLOCK (t)) | |
7750 | finish_function_body (stmt); | |
7751 | else | |
7752 | finish_compound_stmt (COMPOUND_STMT_NO_SCOPE (t), stmt); | |
5566b478 MS |
7753 | } |
7754 | break; | |
8d08fdba | 7755 | |
5566b478 | 7756 | case BREAK_STMT: |
a7e4cfa0 | 7757 | prep_stmt (t); |
ad321293 | 7758 | finish_break_stmt (); |
5566b478 | 7759 | break; |
8d08fdba | 7760 | |
6467930b | 7761 | case CONTINUE_STMT: |
a7e4cfa0 | 7762 | prep_stmt (t); |
ad321293 | 7763 | finish_continue_stmt (); |
6467930b MS |
7764 | break; |
7765 | ||
5566b478 MS |
7766 | case SWITCH_STMT: |
7767 | { | |
558475f0 | 7768 | tree val; |
5566b478 | 7769 | |
a7e4cfa0 | 7770 | prep_stmt (t); |
527f0080 | 7771 | stmt = begin_switch_stmt (); |
4393e105 | 7772 | val = tsubst_expr (SWITCH_COND (t), args, complain, in_decl); |
527f0080 | 7773 | finish_switch_cond (val, stmt); |
558475f0 | 7774 | tsubst_expr (SWITCH_BODY (t), args, complain, in_decl); |
35b1567d | 7775 | finish_switch_stmt (stmt); |
5566b478 MS |
7776 | } |
7777 | break; | |
7778 | ||
7779 | case CASE_LABEL: | |
a7e4cfa0 | 7780 | prep_stmt (t); |
4393e105 | 7781 | finish_case_label (tsubst_expr (CASE_LOW (t), args, complain, in_decl), |
56cb9733 MM |
7782 | tsubst_expr (CASE_HIGH (t), args, complain, |
7783 | in_decl)); | |
5566b478 MS |
7784 | break; |
7785 | ||
acef433b | 7786 | case LABEL_STMT: |
d479d37f | 7787 | input_line = STMT_LINENO (t); |
acef433b | 7788 | finish_label_stmt (DECL_NAME (LABEL_STMT_LABEL (t))); |
5566b478 MS |
7789 | break; |
7790 | ||
aa16c0fa KL |
7791 | case FILE_STMT: |
7792 | input_filename = FILE_STMT_FILENAME (t); | |
7793 | add_stmt (build_nt (FILE_STMT, FILE_STMT_FILENAME_NODE (t))); | |
7794 | break; | |
7795 | ||
5566b478 | 7796 | case GOTO_STMT: |
a7e4cfa0 | 7797 | prep_stmt (t); |
fd10dd09 JM |
7798 | tmp = GOTO_DESTINATION (t); |
7799 | if (TREE_CODE (tmp) != LABEL_DECL) | |
aa09da44 MM |
7800 | /* Computed goto's must be tsubst'd into. On the other hand, |
7801 | non-computed gotos must not be; the identifier in question | |
7802 | will have no binding. */ | |
fd10dd09 | 7803 | tmp = tsubst_expr (tmp, args, complain, in_decl); |
3fa56191 | 7804 | else |
fd10dd09 JM |
7805 | tmp = DECL_NAME (tmp); |
7806 | finish_goto_stmt (tmp); | |
ad321293 MM |
7807 | break; |
7808 | ||
7809 | case ASM_STMT: | |
a7e4cfa0 | 7810 | prep_stmt (t); |
c87978aa JM |
7811 | tmp = finish_asm_stmt |
7812 | (ASM_CV_QUAL (t), | |
7813 | tsubst_expr (ASM_STRING (t), args, complain, in_decl), | |
7814 | tsubst_expr (ASM_OUTPUTS (t), args, complain, in_decl), | |
7815 | tsubst_expr (ASM_INPUTS (t), args, complain, in_decl), | |
7816 | tsubst_expr (ASM_CLOBBERS (t), args, complain, in_decl)); | |
7817 | ASM_INPUT_P (tmp) = ASM_INPUT_P (t); | |
5566b478 | 7818 | break; |
faf5394a MS |
7819 | |
7820 | case TRY_BLOCK: | |
a7e4cfa0 | 7821 | prep_stmt (t); |
f1dedc31 | 7822 | if (CLEANUP_P (t)) |
62409b39 | 7823 | { |
57b52417 | 7824 | stmt = begin_try_block (); |
62409b39 MM |
7825 | tsubst_expr (TRY_STMTS (t), args, complain, in_decl); |
7826 | finish_cleanup_try_block (stmt); | |
7827 | finish_cleanup (tsubst_expr (TRY_HANDLERS (t), args, | |
7828 | complain, in_decl), | |
7829 | stmt); | |
7830 | } | |
f1dedc31 MM |
7831 | else |
7832 | { | |
62409b39 MM |
7833 | if (FN_TRY_BLOCK_P (t)) |
7834 | stmt = begin_function_try_block (); | |
7835 | else | |
7836 | stmt = begin_try_block (); | |
7837 | ||
7838 | tsubst_expr (TRY_STMTS (t), args, complain, in_decl); | |
7839 | ||
7840 | if (FN_TRY_BLOCK_P (t)) | |
7841 | finish_function_try_block (stmt); | |
7842 | else | |
7843 | finish_try_block (stmt); | |
7844 | ||
fd10dd09 | 7845 | tsubst_expr (TRY_HANDLERS (t), args, complain, in_decl); |
84df082b MM |
7846 | if (FN_TRY_BLOCK_P (t)) |
7847 | finish_function_handler_sequence (stmt); | |
7848 | else | |
7849 | finish_handler_sequence (stmt); | |
f1dedc31 | 7850 | } |
faf5394a | 7851 | break; |
b35d4555 | 7852 | |
faf5394a | 7853 | case HANDLER: |
b35d4555 MM |
7854 | { |
7855 | tree decl; | |
b35d4555 MM |
7856 | |
7857 | prep_stmt (t); | |
7858 | stmt = begin_handler (); | |
7859 | if (HANDLER_PARMS (t)) | |
7860 | { | |
7861 | decl = DECL_STMT_DECL (HANDLER_PARMS (t)); | |
7862 | decl = tsubst (decl, args, complain, in_decl); | |
f8191e64 MM |
7863 | /* Prevent instantiate_decl from trying to instantiate |
7864 | this variable. We've already done all that needs to be | |
7865 | done. */ | |
7866 | DECL_TEMPLATE_INSTANTIATED (decl) = 1; | |
b35d4555 MM |
7867 | } |
7868 | else | |
7869 | decl = NULL_TREE; | |
1a6025b4 | 7870 | finish_handler_parms (decl, stmt); |
b35d4555 | 7871 | tsubst_expr (HANDLER_BODY (t), args, complain, in_decl); |
1a6025b4 | 7872 | finish_handler (stmt); |
b35d4555 | 7873 | } |
faf5394a MS |
7874 | break; |
7875 | ||
b87692e5 | 7876 | case TAG_DEFN: |
a7e4cfa0 | 7877 | prep_stmt (t); |
fd10dd09 | 7878 | tsubst (TREE_TYPE (t), args, complain, NULL_TREE); |
b87692e5 MS |
7879 | break; |
7880 | ||
5566b478 | 7881 | default: |
fd10dd09 | 7882 | abort (); |
5566b478 | 7883 | } |
fd10dd09 JM |
7884 | |
7885 | return tsubst_expr (TREE_CHAIN (t), args, complain, in_decl); | |
8d08fdba MS |
7886 | } |
7887 | ||
cc23546e JO |
7888 | /* Like tsubst but deals with expressions and performs semantic |
7889 | analysis. */ | |
7890 | ||
14d22dd6 | 7891 | static tree |
cc23546e JO |
7892 | tsubst_copy_and_build (t, args, complain, in_decl) |
7893 | tree t, args; | |
7894 | tsubst_flags_t complain; | |
7895 | tree in_decl; | |
7896 | { | |
7897 | if (t == NULL_TREE || t == error_mark_node) | |
7898 | return t; | |
7899 | ||
7900 | switch (TREE_CODE (t)) | |
7901 | { | |
7902 | case IDENTIFIER_NODE: | |
7903 | if (IDENTIFIER_TYPENAME_P (t)) | |
7904 | { | |
7905 | tree new_type = tsubst (TREE_TYPE (t), args, complain, in_decl); | |
7906 | return do_identifier (mangle_conv_op_name_for_type (new_type), | |
7907 | NULL_TREE); | |
7908 | } | |
7909 | else | |
7910 | return do_identifier (t, NULL_TREE); | |
7911 | ||
7912 | case LOOKUP_EXPR: | |
7913 | { | |
7914 | if (LOOKUP_EXPR_GLOBAL (t)) | |
7915 | { | |
7916 | tree token | |
7917 | = tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl); | |
7918 | return do_scoped_id (token, IDENTIFIER_GLOBAL_VALUE (token)); | |
7919 | } | |
7920 | else | |
7921 | { | |
7922 | t = do_identifier | |
7923 | (tsubst_copy | |
7924 | (TREE_OPERAND (t, 0), args, complain, in_decl), | |
7925 | NULL_TREE); | |
7926 | if (TREE_CODE (t) == ALIAS_DECL) | |
7927 | t = DECL_INITIAL (t); | |
7928 | return t; | |
7929 | } | |
7930 | } | |
7931 | ||
7932 | case TEMPLATE_ID_EXPR: | |
7933 | { | |
7934 | tree object; | |
7935 | tree template | |
7936 | = tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl); | |
bd83b409 NS |
7937 | tree targs |
7938 | = tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl); | |
cc23546e JO |
7939 | |
7940 | if (TREE_CODE (template) == COMPONENT_REF) | |
7941 | { | |
7942 | object = TREE_OPERAND (template, 0); | |
7943 | template = TREE_OPERAND (template, 1); | |
7944 | } | |
7945 | else | |
7946 | object = NULL_TREE; | |
bd83b409 NS |
7947 | maybe_fold_nontype_args (targs); |
7948 | template = lookup_template_function (template, targs); | |
cc23546e JO |
7949 | |
7950 | if (object) | |
7951 | return build (COMPONENT_REF, TREE_TYPE (template), | |
7952 | object, template); | |
7953 | else | |
7954 | return template; | |
7955 | } | |
7956 | ||
7957 | case INDIRECT_REF: | |
7958 | return build_x_indirect_ref | |
7959 | (tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl), | |
7960 | "unary *"); | |
7961 | ||
7962 | case CAST_EXPR: | |
7963 | return build_functional_cast | |
7964 | (tsubst (TREE_TYPE (t), args, complain, in_decl), | |
7965 | tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl)); | |
7966 | ||
7967 | case REINTERPRET_CAST_EXPR: | |
7968 | return build_reinterpret_cast | |
7969 | (tsubst (TREE_TYPE (t), args, complain, in_decl), | |
7970 | tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl)); | |
7971 | ||
7972 | case CONST_CAST_EXPR: | |
7973 | return build_const_cast | |
7974 | (tsubst (TREE_TYPE (t), args, complain, in_decl), | |
7975 | tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl)); | |
7976 | ||
7977 | case DYNAMIC_CAST_EXPR: | |
7978 | return build_dynamic_cast | |
7979 | (tsubst (TREE_TYPE (t), args, complain, in_decl), | |
7980 | tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl)); | |
7981 | ||
7982 | case STATIC_CAST_EXPR: | |
7983 | return build_static_cast | |
7984 | (tsubst (TREE_TYPE (t), args, complain, in_decl), | |
7985 | tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl)); | |
7986 | ||
7987 | case PREDECREMENT_EXPR: | |
7988 | case PREINCREMENT_EXPR: | |
7989 | case POSTDECREMENT_EXPR: | |
7990 | case POSTINCREMENT_EXPR: | |
7991 | if (TREE_TYPE (t)) | |
7992 | return tsubst_copy (t, args, complain, in_decl); | |
7993 | else | |
7994 | return build_x_unary_op | |
7995 | (TREE_CODE (t), | |
7996 | tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, | |
7997 | in_decl)); | |
7998 | ||
7999 | case NEGATE_EXPR: | |
8000 | case BIT_NOT_EXPR: | |
8001 | if (TREE_TYPE (t)) | |
8002 | return tsubst_copy (t, args, complain, in_decl); | |
8003 | else | |
8004 | return build_x_unary_op | |
8005 | (TREE_CODE (t), | |
8006 | tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, | |
8007 | in_decl)); | |
8008 | ||
8009 | case ABS_EXPR: | |
8010 | if (TREE_TYPE (t)) | |
8011 | return t; | |
8012 | return build_x_unary_op | |
8013 | (TREE_CODE (t), | |
8014 | tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl)); | |
8015 | ||
8016 | case TRUTH_NOT_EXPR: | |
8017 | case ADDR_EXPR: | |
8018 | case CONVERT_EXPR: /* Unary + */ | |
8019 | case REALPART_EXPR: | |
8020 | case IMAGPART_EXPR: | |
8021 | if (TREE_TYPE (t)) | |
8022 | return tsubst_copy (t, args, complain, in_decl); | |
8023 | else | |
8024 | return build_x_unary_op | |
8025 | (TREE_CODE (t), | |
8026 | tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, | |
8027 | in_decl)); | |
8028 | ||
8029 | case PLUS_EXPR: | |
8030 | case MINUS_EXPR: | |
8031 | case MULT_EXPR: | |
8032 | case TRUNC_DIV_EXPR: | |
8033 | case CEIL_DIV_EXPR: | |
8034 | case FLOOR_DIV_EXPR: | |
8035 | case ROUND_DIV_EXPR: | |
8036 | case EXACT_DIV_EXPR: | |
8037 | case BIT_AND_EXPR: | |
8038 | case BIT_ANDTC_EXPR: | |
8039 | case BIT_IOR_EXPR: | |
8040 | case BIT_XOR_EXPR: | |
8041 | case TRUNC_MOD_EXPR: | |
8042 | case FLOOR_MOD_EXPR: | |
8043 | case TRUTH_ANDIF_EXPR: | |
8044 | case TRUTH_ORIF_EXPR: | |
8045 | case TRUTH_AND_EXPR: | |
8046 | case TRUTH_OR_EXPR: | |
8047 | case RSHIFT_EXPR: | |
8048 | case LSHIFT_EXPR: | |
8049 | case RROTATE_EXPR: | |
8050 | case LROTATE_EXPR: | |
8051 | case EQ_EXPR: | |
8052 | case NE_EXPR: | |
8053 | case MAX_EXPR: | |
8054 | case MIN_EXPR: | |
8055 | case LE_EXPR: | |
8056 | case GE_EXPR: | |
8057 | case LT_EXPR: | |
8058 | case GT_EXPR: | |
8059 | case MEMBER_REF: | |
8060 | return build_x_binary_op | |
8061 | (TREE_CODE (t), | |
8062 | tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl), | |
8063 | tsubst_copy_and_build (TREE_OPERAND (t, 1), args, complain, in_decl)); | |
8064 | ||
8065 | case DOTSTAR_EXPR: | |
8066 | return build_m_component_ref | |
8067 | (tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl), | |
8068 | tsubst_copy_and_build (TREE_OPERAND (t, 1), args, complain, in_decl)); | |
8069 | ||
8070 | case SCOPE_REF: | |
8071 | return build_offset_ref | |
8072 | (tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl), | |
8073 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl)); | |
8074 | ||
8075 | case ARRAY_REF: | |
8076 | { | |
8077 | if (tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl) | |
8078 | == NULL_TREE) | |
8079 | /* new-type-id */ | |
8080 | return build_nt | |
8081 | (ARRAY_REF, NULL_TREE, | |
8082 | tsubst_copy_and_build (TREE_OPERAND (t, 1), args, complain, | |
8083 | in_decl)); | |
8084 | ||
8085 | return grok_array_decl | |
8086 | (tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, | |
8087 | in_decl), | |
8088 | tsubst_copy_and_build (TREE_OPERAND (t, 1), args, complain, | |
8089 | in_decl)); | |
8090 | } | |
8091 | ||
8092 | case SIZEOF_EXPR: | |
8093 | case ALIGNOF_EXPR: | |
8094 | { | |
8095 | tree r = | |
8096 | tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl); | |
8097 | if (!TYPE_P (r)) | |
8098 | return TREE_CODE (t) == SIZEOF_EXPR ? | |
8099 | expr_sizeof (r) : c_alignof_expr (r); | |
8100 | else | |
8101 | return cxx_sizeof_or_alignof_type (r, TREE_CODE (t), true); | |
8102 | } | |
8103 | ||
8104 | case MODOP_EXPR: | |
8105 | return build_x_modify_expr | |
8106 | (tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl), | |
8107 | TREE_CODE (TREE_OPERAND (t, 1)), | |
8108 | tsubst_copy_and_build (TREE_OPERAND (t, 2), args, complain, in_decl)); | |
8109 | ||
8110 | case ARROW_EXPR: | |
8111 | return build_x_arrow | |
8112 | (tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl)); | |
8113 | ||
8114 | case NEW_EXPR: | |
8115 | return build_new | |
8116 | (tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl), | |
8117 | tsubst_copy_and_build (TREE_OPERAND (t, 1), args, complain, in_decl), | |
8118 | tsubst_copy_and_build (TREE_OPERAND (t, 2), args, complain, in_decl), | |
8119 | NEW_EXPR_USE_GLOBAL (t)); | |
8120 | ||
8121 | case DELETE_EXPR: | |
8122 | return delete_sanity | |
8123 | (tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl), | |
8124 | tsubst_copy_and_build (TREE_OPERAND (t, 1), args, complain, in_decl), | |
8125 | DELETE_EXPR_USE_VEC (t), | |
8126 | DELETE_EXPR_USE_GLOBAL (t)); | |
8127 | ||
8128 | case COMPOUND_EXPR: | |
8129 | { | |
8130 | if (tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl) | |
8131 | == NULL_TREE) | |
8132 | return build_x_compound_expr | |
8133 | (tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, | |
8134 | in_decl)); | |
8135 | else | |
8136 | abort (); | |
8137 | } | |
8138 | ||
8139 | case METHOD_CALL_EXPR: | |
8140 | { | |
8141 | tree method | |
8142 | = tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl); | |
8143 | ||
8144 | if (TREE_CODE (method) == SCOPE_REF) | |
8145 | { | |
8146 | tree name = TREE_OPERAND (method, 1); | |
8147 | ||
8148 | if (TREE_CODE (name) == TEMPLATE_ID_EXPR) | |
8149 | name = build_nt (TEMPLATE_ID_EXPR, | |
8150 | TREE_OPERAND (name, 0), | |
8151 | TREE_OPERAND (name, 1)); | |
8152 | ||
8153 | return build_scoped_method_call | |
8154 | (tsubst_copy_and_build | |
8155 | (TREE_OPERAND (t, 1), args, complain, in_decl), | |
8156 | TREE_OPERAND (method, 0), | |
8157 | name, | |
8158 | tsubst_copy_and_build | |
8159 | (TREE_OPERAND (t, 2), args, complain, in_decl)); | |
8160 | } | |
8161 | else | |
8162 | { | |
8163 | /* We can get a TEMPLATE_ID_EXPR here on code like: | |
8164 | ||
8165 | x->f<2>(); | |
8166 | ||
8167 | so we must resolve that. However, we can also get things | |
8168 | like a BIT_NOT_EXPR here, when referring to a destructor, | |
8169 | and things like that are not correctly resolved by this | |
8170 | function so just use it when we really need it. */ | |
8171 | if (TREE_CODE (method) == TEMPLATE_ID_EXPR) | |
8172 | method = lookup_template_function | |
8173 | (TREE_OPERAND (method, 0), | |
8174 | TREE_OPERAND (method, 1)); | |
8175 | ||
8176 | return build_method_call | |
8177 | (tsubst_copy_and_build | |
8178 | (TREE_OPERAND (t, 1), args, complain, in_decl), | |
8179 | method, | |
8180 | tsubst_copy_and_build | |
8181 | (TREE_OPERAND (t, 2), args, complain, in_decl), | |
8182 | NULL_TREE, LOOKUP_NORMAL); | |
8183 | } | |
8184 | } | |
8185 | ||
8186 | case CALL_EXPR: | |
8187 | { | |
bbaab916 NS |
8188 | tree function, copy_args; |
8189 | ||
8190 | function = tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl); | |
8191 | copy_args = tsubst_copy_and_build (TREE_OPERAND (t, 1), args, | |
8192 | complain, in_decl); | |
8193 | ||
8194 | if (BASELINK_P (function)) | |
8195 | return build_call_from_tree (function, copy_args, 1); | |
8196 | else if (TREE_CODE (function) == SCOPE_REF) | |
cc23546e JO |
8197 | { |
8198 | tree name = TREE_OPERAND (function, 1); | |
8199 | if (TREE_CODE (name) == TEMPLATE_ID_EXPR) | |
8200 | name = build_nt (TEMPLATE_ID_EXPR, | |
8201 | TREE_OPERAND (name, 0), | |
8b6a662e | 8202 | build_expr_from_tree (TREE_OPERAND (name, 1))); |
bbaab916 NS |
8203 | |
8204 | function = resolve_scoped_fn_name (TREE_OPERAND (function, 0), | |
8205 | name); | |
8206 | ||
8207 | return build_call_from_tree (function, copy_args, 1); | |
cc23546e JO |
8208 | } |
8209 | else | |
8210 | { | |
8211 | tree name = function; | |
8212 | tree id; | |
bbaab916 | 8213 | |
cc23546e JO |
8214 | if (copy_args != NULL_TREE && TREE_CODE (name) == LOOKUP_EXPR |
8215 | && !LOOKUP_EXPR_GLOBAL (name) | |
8216 | && (TREE_CODE ((id = TREE_OPERAND (name, 0))) | |
8217 | == IDENTIFIER_NODE) | |
8218 | && (!current_class_type | |
86ac0575 | 8219 | || !lookup_member (current_class_type, id, 0, false))) |
cc23546e JO |
8220 | { |
8221 | /* Do Koenig lookup if there are no class members. */ | |
8222 | name = do_identifier (id, copy_args); | |
8223 | } | |
8224 | else if (TREE_CODE (name) == TEMPLATE_ID_EXPR | |
8225 | || ! really_overloaded_fn (name)) | |
8226 | name = build_expr_from_tree (name); | |
8227 | ||
8228 | if (TREE_CODE (name) == OFFSET_REF) | |
8229 | return build_offset_ref_call_from_tree (name, copy_args); | |
8230 | if (TREE_CODE (name) == COMPONENT_REF) | |
8231 | return finish_object_call_expr (TREE_OPERAND (name, 1), | |
8232 | TREE_OPERAND (name, 0), | |
8233 | copy_args); | |
8234 | name = convert_from_reference (name); | |
8235 | return build_call_from_tree (name, copy_args, | |
8236 | /*disallow_virtual=*/false); | |
8237 | } | |
8238 | } | |
8239 | ||
8240 | case COND_EXPR: | |
8241 | return build_x_conditional_expr | |
8242 | (tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl), | |
8243 | tsubst_copy_and_build (TREE_OPERAND (t, 1), args, complain, in_decl), | |
8244 | tsubst_copy_and_build (TREE_OPERAND (t, 2), args, complain, in_decl)); | |
8245 | ||
8246 | case PSEUDO_DTOR_EXPR: | |
8247 | return finish_pseudo_destructor_expr | |
8248 | (tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl), | |
8249 | tsubst_copy_and_build (TREE_OPERAND (t, 1), args, complain, in_decl), | |
8250 | tsubst_copy_and_build (TREE_OPERAND (t, 2), args, complain, in_decl)); | |
8251 | ||
8252 | case TREE_LIST: | |
8253 | { | |
8254 | tree purpose, value, chain; | |
8255 | ||
8256 | if (t == void_list_node) | |
8257 | return t; | |
8258 | ||
8259 | purpose = TREE_PURPOSE (t); | |
8260 | if (purpose) | |
8261 | purpose = tsubst_copy_and_build (purpose, args, complain, in_decl); | |
8262 | value = TREE_VALUE (t); | |
8263 | if (value) | |
8264 | value = tsubst_copy_and_build (value, args, complain, in_decl); | |
8265 | chain = TREE_CHAIN (t); | |
8266 | if (chain && chain != void_type_node) | |
8267 | chain = tsubst_copy_and_build (chain, args, complain, in_decl); | |
8268 | if (purpose == TREE_PURPOSE (t) | |
8269 | && value == TREE_VALUE (t) | |
8270 | && chain == TREE_CHAIN (t)) | |
8271 | return t; | |
8272 | return tree_cons (purpose, value, chain); | |
8273 | } | |
8274 | ||
8275 | case COMPONENT_REF: | |
8276 | { | |
8277 | tree object = | |
8278 | tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl); | |
8279 | tree member = | |
8280 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl); | |
8281 | ||
8282 | if (!CLASS_TYPE_P (TREE_TYPE (object))) | |
8283 | { | |
8284 | if (TREE_CODE (member) == BIT_NOT_EXPR) | |
8285 | return finish_pseudo_destructor_expr (object, | |
8286 | NULL_TREE, | |
8287 | TREE_TYPE (object)); | |
8288 | else if (TREE_CODE (member) == SCOPE_REF | |
8289 | && (TREE_CODE (TREE_OPERAND (member, 1)) == BIT_NOT_EXPR)) | |
8290 | return finish_pseudo_destructor_expr (object, | |
8291 | object, | |
8292 | TREE_TYPE (object)); | |
8293 | } | |
8294 | else if (TREE_CODE (member) == SCOPE_REF | |
8295 | && TREE_CODE (TREE_OPERAND (member, 1)) == TEMPLATE_ID_EXPR) | |
8296 | { | |
8297 | tree tmpl; | |
8298 | tree args; | |
8299 | ||
8300 | /* Lookup the template functions now that we know what the | |
8301 | scope is. */ | |
8302 | tmpl = TREE_OPERAND (TREE_OPERAND (member, 1), 0); | |
8303 | args = TREE_OPERAND (TREE_OPERAND (member, 1), 1); | |
8304 | member = lookup_qualified_name (TREE_OPERAND (member, 0), | |
8305 | tmpl, | |
8306 | /*is_type=*/0, | |
8307 | /*flags=*/0); | |
8308 | if (BASELINK_P (member)) | |
8309 | BASELINK_FUNCTIONS (member) | |
8310 | = build_nt (TEMPLATE_ID_EXPR, BASELINK_FUNCTIONS (member), | |
8311 | args); | |
8312 | else | |
8313 | { | |
8314 | error ("`%D' is not a member of `%T'", | |
8315 | tmpl, TREE_TYPE (object)); | |
8316 | return error_mark_node; | |
8317 | } | |
8318 | } | |
8319 | ||
8320 | return finish_class_member_access_expr (object, member); | |
8321 | } | |
8322 | ||
8323 | case THROW_EXPR: | |
8324 | return build_throw | |
8325 | (tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, in_decl)); | |
8326 | ||
8327 | case CONSTRUCTOR: | |
8328 | { | |
8329 | tree r; | |
8330 | tree elts; | |
8331 | tree type = tsubst (TREE_TYPE (t), args, complain, in_decl); | |
8332 | bool purpose_p; | |
8333 | ||
8334 | /* digest_init will do the wrong thing if we let it. */ | |
8335 | if (type && TYPE_PTRMEMFUNC_P (type)) | |
8336 | return t; | |
8337 | ||
8338 | r = NULL_TREE; | |
8339 | /* We do not want to process the purpose of aggregate | |
8340 | initializers as they are identifier nodes which will be | |
8341 | looked up by digest_init. */ | |
8342 | purpose_p = !(type && IS_AGGR_TYPE (type)); | |
db77ef4c | 8343 | for (elts = CONSTRUCTOR_ELTS (t); |
cc23546e JO |
8344 | elts; |
8345 | elts = TREE_CHAIN (elts)) | |
8346 | { | |
8347 | tree purpose = TREE_PURPOSE (elts); | |
8348 | tree value = TREE_VALUE (elts); | |
8349 | ||
8350 | if (purpose && purpose_p) | |
8351 | purpose | |
8352 | = tsubst_copy_and_build (purpose, args, complain, in_decl); | |
8353 | value = tsubst_copy_and_build (value, args, complain, in_decl); | |
8354 | r = tree_cons (purpose, value, r); | |
8355 | } | |
8356 | ||
dcf92453 | 8357 | r = build_constructor (NULL_TREE, nreverse (r)); |
cc23546e JO |
8358 | TREE_HAS_CONSTRUCTOR (r) = TREE_HAS_CONSTRUCTOR (t); |
8359 | ||
8360 | if (type) | |
8361 | return digest_init (type, r, 0); | |
8362 | return r; | |
8363 | } | |
8364 | ||
8365 | case TYPEID_EXPR: | |
8366 | { | |
8367 | tree operand_0 | |
8368 | = tsubst_copy_and_build (TREE_OPERAND (t, 0), args, complain, | |
8369 | in_decl); | |
8370 | ||
8371 | if (TYPE_P (operand_0)) | |
8372 | return get_typeid (operand_0); | |
8373 | return build_typeid (operand_0); | |
8374 | } | |
8375 | ||
8376 | case PARM_DECL: | |
8377 | return convert_from_reference (tsubst_copy (t, args, complain, in_decl)); | |
8378 | ||
8379 | case VAR_DECL: | |
8380 | return convert_from_reference (tsubst_copy (t, args, complain, in_decl)); | |
8381 | ||
8382 | case VA_ARG_EXPR: | |
8383 | return build_x_va_arg | |
8384 | (tsubst_copy_and_build | |
8385 | (TREE_OPERAND (t, 0), args, complain, in_decl), | |
8386 | tsubst_copy (TREE_TYPE (t), args, complain, in_decl)); | |
8387 | ||
8388 | default: | |
8389 | return tsubst_copy (t, args, complain, in_decl); | |
8390 | } | |
8391 | } | |
8392 | ||
3e4a3562 NS |
8393 | /* Verify that the instantiated ARGS are valid. For type arguments, |
8394 | make sure that the type's linkage is ok. For non-type arguments, | |
8395 | make sure they are constants if they are integral or enumarations. | |
8396 | Emit an error under control of COMPLAIN, and return TRUE on error. */ | |
8397 | ||
8398 | static bool | |
8399 | check_instantiated_args (tmpl, args, complain) | |
8400 | tree tmpl, args; | |
8401 | tsubst_flags_t complain; | |
8402 | { | |
8403 | int ix, len = DECL_NTPARMS (tmpl); | |
8404 | bool result = false; | |
8405 | ||
8406 | for (ix = 0; ix != len; ix++) | |
8407 | { | |
8408 | tree t = TREE_VEC_ELT (args, ix); | |
8409 | ||
8410 | if (TYPE_P (t)) | |
8411 | { | |
8412 | /* [basic.link]: A name with no linkage (notably, the name | |
8413 | of a class or enumeration declared in a local scope) | |
8414 | shall not be used to declare an entity with linkage. | |
8415 | This implies that names with no linkage cannot be used as | |
8416 | template arguments. */ | |
8417 | tree nt = no_linkage_check (t); | |
8418 | ||
8419 | if (nt) | |
8420 | { | |
8421 | if (!(complain & tf_error)) | |
8422 | /*OK*/; | |
8423 | else if (TYPE_ANONYMOUS_P (nt)) | |
8424 | error ("`%T' uses anonymous type", t); | |
8425 | else | |
8426 | error ("`%T' uses local type `%T'", t, nt); | |
8427 | result = true; | |
8428 | } | |
8429 | /* In order to avoid all sorts of complications, we do not | |
8430 | allow variably-modified types as template arguments. */ | |
8431 | else if (variably_modified_type_p (t)) | |
8432 | { | |
8433 | if (complain & tf_error) | |
8434 | error ("`%T' is a variably modified type", t); | |
8435 | result = true; | |
8436 | } | |
8437 | } | |
8438 | /* A non-type argument of integral or enumerated type must be a | |
8439 | constant. */ | |
8440 | else if (TREE_TYPE (t) | |
8441 | && INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (t)) | |
8442 | && !TREE_CONSTANT (t)) | |
8443 | { | |
8444 | if (complain & tf_error) | |
8445 | error ("integral expression `%E' is not constant", t); | |
8446 | result = true; | |
8447 | } | |
8448 | } | |
8449 | if (result && complain & tf_error) | |
8450 | error (" trying to instantiate `%D'", tmpl); | |
8451 | return result; | |
8452 | } | |
8453 | ||
6ba89f8e | 8454 | /* Instantiate the indicated variable or function template TMPL with |
36a117a5 MM |
8455 | the template arguments in TARG_PTR. */ |
8456 | ||
5566b478 | 8457 | tree |
3e4a3562 | 8458 | instantiate_template (tmpl, targ_ptr, complain) |
98c1c668 | 8459 | tree tmpl, targ_ptr; |
3e4a3562 | 8460 | tsubst_flags_t complain; |
8d08fdba | 8461 | { |
5566b478 | 8462 | tree fndecl; |
36a117a5 MM |
8463 | tree gen_tmpl; |
8464 | tree spec; | |
5566b478 | 8465 | |
27fafc8d JM |
8466 | if (tmpl == error_mark_node) |
8467 | return error_mark_node; | |
8468 | ||
386b8a85 JM |
8469 | my_friendly_assert (TREE_CODE (tmpl) == TEMPLATE_DECL, 283); |
8470 | ||
db9b2174 MM |
8471 | /* If this function is a clone, handle it specially. */ |
8472 | if (DECL_CLONED_FUNCTION_P (tmpl)) | |
3ad97789 | 8473 | { |
3e4a3562 NS |
8474 | tree spec = instantiate_template (DECL_CLONED_FUNCTION (tmpl), targ_ptr, |
8475 | complain); | |
3ad97789 NS |
8476 | tree clone; |
8477 | ||
c6002625 | 8478 | /* Look for the clone. */ |
3ad97789 NS |
8479 | for (clone = TREE_CHAIN (spec); |
8480 | clone && DECL_CLONED_FUNCTION_P (clone); | |
8481 | clone = TREE_CHAIN (clone)) | |
8482 | if (DECL_NAME (clone) == DECL_NAME (tmpl)) | |
8483 | return clone; | |
8484 | /* We should always have found the clone by now. */ | |
a98facb0 | 8485 | abort (); |
3ad97789 NS |
8486 | return NULL_TREE; |
8487 | } | |
8488 | ||
36a117a5 MM |
8489 | /* Check to see if we already have this specialization. */ |
8490 | spec = retrieve_specialization (tmpl, targ_ptr); | |
8491 | if (spec != NULL_TREE) | |
8492 | return spec; | |
8493 | ||
f9a7ae04 MM |
8494 | gen_tmpl = most_general_template (tmpl); |
8495 | if (tmpl != gen_tmpl) | |
386b8a85 | 8496 | { |
36a117a5 MM |
8497 | /* The TMPL is a partial instantiation. To get a full set of |
8498 | arguments we must add the arguments used to perform the | |
8499 | partial instantiation. */ | |
8500 | targ_ptr = add_outermost_template_args (DECL_TI_ARGS (tmpl), | |
8501 | targ_ptr); | |
36a117a5 MM |
8502 | |
8503 | /* Check to see if we already have this specialization. */ | |
8504 | spec = retrieve_specialization (gen_tmpl, targ_ptr); | |
75650646 MM |
8505 | if (spec != NULL_TREE) |
8506 | return spec; | |
386b8a85 JM |
8507 | } |
8508 | ||
3e4a3562 NS |
8509 | if (check_instantiated_args (gen_tmpl, INNERMOST_TEMPLATE_ARGS (targ_ptr), |
8510 | complain)) | |
8511 | return error_mark_node; | |
8512 | ||
5c74d5b0 | 8513 | /* Make sure that we can see identifiers, and compute access |
2b59fc25 KL |
8514 | correctly. The desired FUNCTION_DECL for FNDECL may or may not be |
8515 | created earlier. Let push_access_scope_real figure that out. */ | |
8516 | push_access_scope_real | |
8517 | (gen_tmpl, targ_ptr, tsubst (DECL_CONTEXT (gen_tmpl), targ_ptr, | |
3e4a3562 | 8518 | complain, gen_tmpl)); |
5c74d5b0 | 8519 | |
5566b478 | 8520 | /* substitute template parameters */ |
17aec3eb | 8521 | fndecl = tsubst (DECL_TEMPLATE_RESULT (gen_tmpl), |
3e4a3562 | 8522 | targ_ptr, complain, gen_tmpl); |
5c74d5b0 | 8523 | |
2b59fc25 | 8524 | pop_access_scope (gen_tmpl); |
5c74d5b0 | 8525 | |
36a117a5 MM |
8526 | /* The DECL_TI_TEMPLATE should always be the immediate parent |
8527 | template, not the most general template. */ | |
8528 | DECL_TI_TEMPLATE (fndecl) = tmpl; | |
8d08fdba | 8529 | |
824b9a4c MS |
8530 | if (flag_external_templates) |
8531 | add_pending_template (fndecl); | |
8532 | ||
94350948 | 8533 | /* If we've just instantiated the main entry point for a function, |
3ad97789 NS |
8534 | instantiate all the alternate entry points as well. We do this |
8535 | by cloning the instantiation of the main entry point, not by | |
8536 | instantiating the template clones. */ | |
8537 | if (TREE_CHAIN (gen_tmpl) && DECL_CLONED_FUNCTION_P (TREE_CHAIN (gen_tmpl))) | |
8538 | clone_function_decl (fndecl, /*update_method_vec_p=*/0); | |
94350948 | 8539 | |
5566b478 | 8540 | return fndecl; |
8d08fdba | 8541 | } |
5566b478 | 8542 | |
4393e105 MM |
8543 | /* The FN is a TEMPLATE_DECL for a function. The ARGS are the |
8544 | arguments that are being used when calling it. TARGS is a vector | |
8545 | into which the deduced template arguments are placed. | |
8d08fdba MS |
8546 | |
8547 | Return zero for success, 2 for an incomplete match that doesn't resolve | |
8548 | all the types, and 1 for complete failure. An error message will be | |
8549 | printed only for an incomplete match. | |
8550 | ||
e5214479 JM |
8551 | If FN is a conversion operator, or we are trying to produce a specific |
8552 | specialization, RETURN_TYPE is the return type desired. | |
9f54c803 MM |
8553 | |
8554 | The EXPLICIT_TARGS are explicit template arguments provided via a | |
8555 | template-id. | |
6467930b | 8556 | |
830bfa74 MM |
8557 | The parameter STRICT is one of: |
8558 | ||
8559 | DEDUCE_CALL: | |
8560 | We are deducing arguments for a function call, as in | |
8561 | [temp.deduct.call]. | |
8562 | ||
8563 | DEDUCE_CONV: | |
8564 | We are deducing arguments for a conversion function, as in | |
8565 | [temp.deduct.conv]. | |
8566 | ||
8567 | DEDUCE_EXACT: | |
62e4a758 NS |
8568 | We are deducing arguments when doing an explicit instantiation |
8569 | as in [temp.explicit], when determining an explicit specialization | |
8570 | as in [temp.expl.spec], or when taking the address of a function | |
8571 | template, as in [temp.deduct.funcaddr]. | |
8572 | ||
8573 | DEDUCE_ORDER: | |
830bfa74 MM |
8574 | We are deducing arguments when calculating the partial |
8575 | ordering between specializations of function or class | |
62e4a758 | 8576 | templates, as in [temp.func.order] and [temp.class.order]. |
4393e105 | 8577 | |
e5214479 JM |
8578 | LEN is the number of parms to consider before returning success, or -1 |
8579 | for all. This is used in partial ordering to avoid comparing parms for | |
8580 | which no actual argument was passed, since they are not considered in | |
8581 | overload resolution (and are explicitly excluded from consideration in | |
8582 | partial ordering in [temp.func.order]/6). */ | |
8d08fdba MS |
8583 | |
8584 | int | |
4393e105 | 8585 | fn_type_unification (fn, explicit_targs, targs, args, return_type, |
e5214479 | 8586 | strict, len) |
4393e105 | 8587 | tree fn, explicit_targs, targs, args, return_type; |
830bfa74 | 8588 | unification_kind_t strict; |
e5214479 | 8589 | int len; |
386b8a85 | 8590 | { |
4393e105 MM |
8591 | tree parms; |
8592 | tree fntype; | |
adecb3f4 | 8593 | int result; |
386b8a85 | 8594 | |
4393e105 | 8595 | my_friendly_assert (TREE_CODE (fn) == TEMPLATE_DECL, 0); |
2b59fc25 | 8596 | |
4393e105 MM |
8597 | fntype = TREE_TYPE (fn); |
8598 | if (explicit_targs) | |
75650646 | 8599 | { |
4393e105 MM |
8600 | /* [temp.deduct] |
8601 | ||
8602 | The specified template arguments must match the template | |
8603 | parameters in kind (i.e., type, nontype, template), and there | |
8604 | must not be more arguments than there are parameters; | |
8605 | otherwise type deduction fails. | |
8606 | ||
8607 | Nontype arguments must match the types of the corresponding | |
8608 | nontype template parameters, or must be convertible to the | |
8609 | types of the corresponding nontype parameters as specified in | |
8610 | _temp.arg.nontype_, otherwise type deduction fails. | |
8611 | ||
8612 | All references in the function type of the function template | |
8613 | to the corresponding template parameters are replaced by the | |
8614 | specified template argument values. If a substitution in a | |
8615 | template parameter or in the function type of the function | |
8616 | template results in an invalid type, type deduction fails. */ | |
8617 | int i; | |
8618 | tree converted_args; | |
75650646 | 8619 | |
4393e105 MM |
8620 | converted_args |
8621 | = (coerce_template_parms (DECL_INNERMOST_TEMPLATE_PARMS (fn), | |
c2ea3a40 | 8622 | explicit_targs, NULL_TREE, tf_none, |
4393e105 MM |
8623 | /*require_all_arguments=*/0)); |
8624 | if (converted_args == error_mark_node) | |
75650646 | 8625 | return 1; |
386b8a85 | 8626 | |
c2ea3a40 | 8627 | fntype = tsubst (fntype, converted_args, tf_none, NULL_TREE); |
4393e105 MM |
8628 | if (fntype == error_mark_node) |
8629 | return 1; | |
050367a3 | 8630 | |
4393e105 MM |
8631 | /* Place the explicitly specified arguments in TARGS. */ |
8632 | for (i = 0; i < TREE_VEC_LENGTH (targs); i++) | |
8633 | TREE_VEC_ELT (targs, i) = TREE_VEC_ELT (converted_args, i); | |
75650646 | 8634 | } |
4393e105 MM |
8635 | |
8636 | parms = TYPE_ARG_TYPES (fntype); | |
e5214479 JM |
8637 | /* Never do unification on the 'this' parameter. */ |
8638 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fn)) | |
8639 | parms = TREE_CHAIN (parms); | |
8d3631f8 NS |
8640 | |
8641 | if (return_type) | |
8642 | { | |
8643 | /* We've been given a return type to match, prepend it. */ | |
8644 | parms = tree_cons (NULL_TREE, TREE_TYPE (fntype), parms); | |
8645 | args = tree_cons (NULL_TREE, return_type, args); | |
16e42e7c JM |
8646 | if (len >= 0) |
8647 | ++len; | |
4393e105 MM |
8648 | } |
8649 | ||
4393e105 MM |
8650 | /* We allow incomplete unification without an error message here |
8651 | because the standard doesn't seem to explicitly prohibit it. Our | |
8652 | callers must be ready to deal with unification failures in any | |
8653 | event. */ | |
adecb3f4 MM |
8654 | result = type_unification_real (DECL_INNERMOST_TEMPLATE_PARMS (fn), |
8655 | targs, parms, args, /*subr=*/0, | |
e5214479 | 8656 | strict, /*allow_incomplete*/1, len); |
adecb3f4 MM |
8657 | |
8658 | if (result == 0) | |
8659 | /* All is well so far. Now, check: | |
8660 | ||
8661 | [temp.deduct] | |
8662 | ||
8663 | When all template arguments have been deduced, all uses of | |
8664 | template parameters in nondeduced contexts are replaced with | |
8665 | the corresponding deduced argument values. If the | |
8666 | substitution results in an invalid type, as described above, | |
8667 | type deduction fails. */ | |
c2ea3a40 | 8668 | if (tsubst (TREE_TYPE (fn), targs, tf_none, NULL_TREE) |
adecb3f4 MM |
8669 | == error_mark_node) |
8670 | return 1; | |
8671 | ||
8672 | return result; | |
830bfa74 MM |
8673 | } |
8674 | ||
8675 | /* Adjust types before performing type deduction, as described in | |
8676 | [temp.deduct.call] and [temp.deduct.conv]. The rules in these two | |
4c7d0dff MM |
8677 | sections are symmetric. PARM is the type of a function parameter |
8678 | or the return type of the conversion function. ARG is the type of | |
8679 | the argument passed to the call, or the type of the value | |
dc957d14 | 8680 | initialized with the result of the conversion function. */ |
386b8a85 | 8681 | |
62e4a758 | 8682 | static int |
830bfa74 MM |
8683 | maybe_adjust_types_for_deduction (strict, parm, arg) |
8684 | unification_kind_t strict; | |
8685 | tree* parm; | |
8686 | tree* arg; | |
8687 | { | |
62e4a758 NS |
8688 | int result = 0; |
8689 | ||
830bfa74 MM |
8690 | switch (strict) |
8691 | { | |
8692 | case DEDUCE_CALL: | |
8693 | break; | |
8694 | ||
8695 | case DEDUCE_CONV: | |
8696 | { | |
4c7d0dff MM |
8697 | /* Swap PARM and ARG throughout the remainder of this |
8698 | function; the handling is precisely symmetric since PARM | |
8699 | will initialize ARG rather than vice versa. */ | |
830bfa74 MM |
8700 | tree* temp = parm; |
8701 | parm = arg; | |
8702 | arg = temp; | |
8703 | break; | |
8704 | } | |
8705 | ||
8706 | case DEDUCE_EXACT: | |
8707 | /* There is nothing to do in this case. */ | |
62e4a758 | 8708 | return 0; |
830bfa74 | 8709 | |
62e4a758 NS |
8710 | case DEDUCE_ORDER: |
8711 | /* DR 214. [temp.func.order] is underspecified, and leads to no | |
8712 | ordering between things like `T *' and `T const &' for `U *'. | |
8713 | The former has T=U and the latter T=U*. The former looks more | |
8714 | specialized and John Spicer considers it well-formed (the EDG | |
8715 | compiler accepts it). | |
8716 | ||
8717 | John also confirms that deduction should proceed as in a function | |
996065b4 | 8718 | call. Which implies the usual ARG and PARM conversions as DEDUCE_CALL. |
62e4a758 NS |
8719 | However, in ordering, ARG can have REFERENCE_TYPE, but no argument |
8720 | to an actual call can have such a type. | |
8721 | ||
996065b4 NS |
8722 | If both ARG and PARM are REFERENCE_TYPE, we change neither. |
8723 | If only ARG is a REFERENCE_TYPE, we look through that and then | |
8724 | proceed as with DEDUCE_CALL (which could further convert it). */ | |
62e4a758 NS |
8725 | if (TREE_CODE (*arg) == REFERENCE_TYPE) |
8726 | { | |
8727 | if (TREE_CODE (*parm) == REFERENCE_TYPE) | |
8728 | return 0; | |
8729 | *arg = TREE_TYPE (*arg); | |
62e4a758 NS |
8730 | } |
8731 | break; | |
830bfa74 | 8732 | default: |
a98facb0 | 8733 | abort (); |
830bfa74 MM |
8734 | } |
8735 | ||
8736 | if (TREE_CODE (*parm) != REFERENCE_TYPE) | |
8737 | { | |
8738 | /* [temp.deduct.call] | |
8739 | ||
8740 | If P is not a reference type: | |
8741 | ||
8742 | --If A is an array type, the pointer type produced by the | |
8743 | array-to-pointer standard conversion (_conv.array_) is | |
8744 | used in place of A for type deduction; otherwise, | |
8745 | ||
8746 | --If A is a function type, the pointer type produced by | |
8747 | the function-to-pointer standard conversion | |
8748 | (_conv.func_) is used in place of A for type deduction; | |
8749 | otherwise, | |
8750 | ||
8751 | --If A is a cv-qualified type, the top level | |
8752 | cv-qualifiers of A's type are ignored for type | |
8753 | deduction. */ | |
8754 | if (TREE_CODE (*arg) == ARRAY_TYPE) | |
8755 | *arg = build_pointer_type (TREE_TYPE (*arg)); | |
d8f8dca1 | 8756 | else if (TREE_CODE (*arg) == FUNCTION_TYPE) |
830bfa74 MM |
8757 | *arg = build_pointer_type (*arg); |
8758 | else | |
8759 | *arg = TYPE_MAIN_VARIANT (*arg); | |
8760 | } | |
8761 | ||
8762 | /* [temp.deduct.call] | |
8763 | ||
8764 | If P is a cv-qualified type, the top level cv-qualifiers | |
8765 | of P's type are ignored for type deduction. If P is a | |
8766 | reference type, the type referred to by P is used for | |
8767 | type deduction. */ | |
8768 | *parm = TYPE_MAIN_VARIANT (*parm); | |
8769 | if (TREE_CODE (*parm) == REFERENCE_TYPE) | |
62e4a758 NS |
8770 | { |
8771 | *parm = TREE_TYPE (*parm); | |
8772 | result |= UNIFY_ALLOW_OUTER_MORE_CV_QUAL; | |
8773 | } | |
1c82cc90 NS |
8774 | |
8775 | /* DR 322. For conversion deduction, remove a reference type on parm | |
8776 | too (which has been swapped into ARG). */ | |
8777 | if (strict == DEDUCE_CONV && TREE_CODE (*arg) == REFERENCE_TYPE) | |
8778 | *arg = TREE_TYPE (*arg); | |
8779 | ||
62e4a758 | 8780 | return result; |
386b8a85 JM |
8781 | } |
8782 | ||
e5214479 | 8783 | /* Most parms like fn_type_unification. |
9f54c803 MM |
8784 | |
8785 | If SUBR is 1, we're being called recursively (to unify the | |
8786 | arguments of a function or method parameter of a function | |
8787 | template). */ | |
386b8a85 | 8788 | |
4966381a | 8789 | static int |
bd0d5d4a JM |
8790 | type_unification_real (tparms, targs, xparms, xargs, subr, |
8791 | strict, allow_incomplete, xlen) | |
8792 | tree tparms, targs, xparms, xargs; | |
830bfa74 MM |
8793 | int subr; |
8794 | unification_kind_t strict; | |
bd0d5d4a | 8795 | int allow_incomplete, xlen; |
8d08fdba MS |
8796 | { |
8797 | tree parm, arg; | |
8798 | int i; | |
8799 | int ntparms = TREE_VEC_LENGTH (tparms); | |
830bfa74 | 8800 | int sub_strict; |
bd0d5d4a JM |
8801 | int saw_undeduced = 0; |
8802 | tree parms, args; | |
8803 | int len; | |
8d08fdba MS |
8804 | |
8805 | my_friendly_assert (TREE_CODE (tparms) == TREE_VEC, 289); | |
bd0d5d4a JM |
8806 | my_friendly_assert (xparms == NULL_TREE |
8807 | || TREE_CODE (xparms) == TREE_LIST, 290); | |
4ba126e4 | 8808 | /* ARGS could be NULL. */ |
bd0d5d4a JM |
8809 | if (xargs) |
8810 | my_friendly_assert (TREE_CODE (xargs) == TREE_LIST, 291); | |
8d08fdba MS |
8811 | my_friendly_assert (ntparms > 0, 292); |
8812 | ||
830bfa74 MM |
8813 | switch (strict) |
8814 | { | |
8815 | case DEDUCE_CALL: | |
028d1f20 NS |
8816 | sub_strict = (UNIFY_ALLOW_OUTER_LEVEL | UNIFY_ALLOW_MORE_CV_QUAL |
8817 | | UNIFY_ALLOW_DERIVED); | |
830bfa74 MM |
8818 | break; |
8819 | ||
8820 | case DEDUCE_CONV: | |
8821 | sub_strict = UNIFY_ALLOW_LESS_CV_QUAL; | |
8822 | break; | |
8823 | ||
8824 | case DEDUCE_EXACT: | |
8825 | sub_strict = UNIFY_ALLOW_NONE; | |
8826 | break; | |
62e4a758 NS |
8827 | |
8828 | case DEDUCE_ORDER: | |
8829 | sub_strict = UNIFY_ALLOW_NONE; | |
8830 | break; | |
830bfa74 MM |
8831 | |
8832 | default: | |
a98facb0 | 8833 | abort (); |
830bfa74 MM |
8834 | } |
8835 | ||
bd0d5d4a | 8836 | if (xlen == 0) |
e5214479 JM |
8837 | return 0; |
8838 | ||
bd0d5d4a JM |
8839 | again: |
8840 | parms = xparms; | |
8841 | args = xargs; | |
8842 | len = xlen; | |
8843 | ||
8d08fdba MS |
8844 | while (parms |
8845 | && parms != void_list_node | |
8846 | && args | |
8847 | && args != void_list_node) | |
8848 | { | |
8849 | parm = TREE_VALUE (parms); | |
8850 | parms = TREE_CHAIN (parms); | |
8851 | arg = TREE_VALUE (args); | |
8852 | args = TREE_CHAIN (args); | |
8853 | ||
8854 | if (arg == error_mark_node) | |
8855 | return 1; | |
8856 | if (arg == unknown_type_node) | |
34016c81 JM |
8857 | /* We can't deduce anything from this, but we might get all the |
8858 | template args from other function args. */ | |
8859 | continue; | |
b7484fbe | 8860 | |
03e70705 JM |
8861 | /* Conversions will be performed on a function argument that |
8862 | corresponds with a function parameter that contains only | |
8863 | non-deducible template parameters and explicitly specified | |
8864 | template parameters. */ | |
8865 | if (! uses_template_parms (parm)) | |
b7484fbe | 8866 | { |
03e70705 JM |
8867 | tree type; |
8868 | ||
2f939d94 | 8869 | if (!TYPE_P (arg)) |
03e70705 JM |
8870 | type = TREE_TYPE (arg); |
8871 | else | |
8872 | { | |
8873 | type = arg; | |
8874 | arg = NULL_TREE; | |
8875 | } | |
8876 | ||
62e4a758 | 8877 | if (strict == DEDUCE_EXACT || strict == DEDUCE_ORDER) |
03e70705 | 8878 | { |
3bfdc719 | 8879 | if (same_type_p (parm, type)) |
03e70705 JM |
8880 | continue; |
8881 | } | |
03e70705 | 8882 | else |
343c89cd JM |
8883 | /* It might work; we shouldn't check now, because we might |
8884 | get into infinite recursion. Overload resolution will | |
8885 | handle it. */ | |
8886 | continue; | |
03e70705 | 8887 | |
b7484fbe MS |
8888 | return 1; |
8889 | } | |
8890 | ||
2f939d94 | 8891 | if (!TYPE_P (arg)) |
8d08fdba MS |
8892 | { |
8893 | my_friendly_assert (TREE_TYPE (arg) != NULL_TREE, 293); | |
34016c81 | 8894 | if (type_unknown_p (arg)) |
28cbf42c | 8895 | { |
34016c81 JM |
8896 | /* [temp.deduct.type] A template-argument can be deduced from |
8897 | a pointer to function or pointer to member function | |
8898 | argument if the set of overloaded functions does not | |
8899 | contain function templates and at most one of a set of | |
8900 | overloaded functions provides a unique match. */ | |
8901 | ||
8902 | if (resolve_overloaded_unification | |
4393e105 | 8903 | (tparms, targs, parm, arg, strict, sub_strict) |
34016c81 JM |
8904 | != 0) |
8905 | return 1; | |
8906 | continue; | |
28cbf42c | 8907 | } |
8d08fdba MS |
8908 | arg = TREE_TYPE (arg); |
8909 | } | |
62e4a758 NS |
8910 | |
8911 | { | |
8912 | int arg_strict = sub_strict; | |
8913 | ||
8914 | if (!subr) | |
8915 | arg_strict |= maybe_adjust_types_for_deduction (strict, &parm, &arg); | |
4393e105 | 8916 | |
62e4a758 NS |
8917 | if (unify (tparms, targs, parm, arg, arg_strict)) |
8918 | return 1; | |
8919 | } | |
e5214479 JM |
8920 | |
8921 | /* Are we done with the interesting parms? */ | |
8922 | if (--len == 0) | |
bd0d5d4a | 8923 | goto done; |
8d08fdba MS |
8924 | } |
8925 | /* Fail if we've reached the end of the parm list, and more args | |
8926 | are present, and the parm list isn't variadic. */ | |
8927 | if (args && args != void_list_node && parms == void_list_node) | |
8928 | return 1; | |
8929 | /* Fail if parms are left and they don't have default values. */ | |
8930 | if (parms | |
8931 | && parms != void_list_node | |
8932 | && TREE_PURPOSE (parms) == NULL_TREE) | |
8933 | return 1; | |
bd0d5d4a JM |
8934 | |
8935 | done: | |
8d08fdba MS |
8936 | if (!subr) |
8937 | for (i = 0; i < ntparms; i++) | |
050367a3 | 8938 | if (TREE_VEC_ELT (targs, i) == NULL_TREE) |
8d08fdba | 8939 | { |
bd0d5d4a JM |
8940 | tree tparm = TREE_VALUE (TREE_VEC_ELT (tparms, i)); |
8941 | ||
8942 | /* If this is an undeduced nontype parameter that depends on | |
8943 | a type parameter, try another pass; its type may have been | |
8944 | deduced from a later argument than the one from which | |
8945 | this parameter can be deduced. */ | |
8946 | if (TREE_CODE (tparm) == PARM_DECL | |
8947 | && uses_template_parms (TREE_TYPE (tparm)) | |
8948 | && !saw_undeduced++) | |
8949 | goto again; | |
8950 | ||
386b8a85 | 8951 | if (!allow_incomplete) |
8251199e | 8952 | error ("incomplete type unification"); |
8d08fdba MS |
8953 | return 2; |
8954 | } | |
8955 | return 0; | |
8956 | } | |
8957 | ||
34016c81 JM |
8958 | /* Subroutine of type_unification_real. Args are like the variables at the |
8959 | call site. ARG is an overloaded function (or template-id); we try | |
8960 | deducing template args from each of the overloads, and if only one | |
8961 | succeeds, we go with that. Modifies TARGS and returns 0 on success. */ | |
8962 | ||
8963 | static int | |
8964 | resolve_overloaded_unification (tparms, targs, parm, arg, strict, | |
4393e105 | 8965 | sub_strict) |
34016c81 JM |
8966 | tree tparms, targs, parm, arg; |
8967 | unification_kind_t strict; | |
8968 | int sub_strict; | |
34016c81 JM |
8969 | { |
8970 | tree tempargs = copy_node (targs); | |
8971 | int good = 0; | |
8972 | ||
8973 | if (TREE_CODE (arg) == ADDR_EXPR) | |
8974 | arg = TREE_OPERAND (arg, 0); | |
9f3d9e46 | 8975 | |
d8f8dca1 MM |
8976 | if (TREE_CODE (arg) == COMPONENT_REF) |
8977 | /* Handle `&x' where `x' is some static or non-static member | |
8978 | function name. */ | |
8979 | arg = TREE_OPERAND (arg, 1); | |
8980 | ||
05e0b2f4 JM |
8981 | if (TREE_CODE (arg) == OFFSET_REF) |
8982 | arg = TREE_OPERAND (arg, 1); | |
8983 | ||
9f3d9e46 | 8984 | /* Strip baselink information. */ |
50ad9642 MM |
8985 | if (BASELINK_P (arg)) |
8986 | arg = BASELINK_FUNCTIONS (arg); | |
9f3d9e46 | 8987 | |
34016c81 JM |
8988 | if (TREE_CODE (arg) == TEMPLATE_ID_EXPR) |
8989 | { | |
8990 | /* If we got some explicit template args, we need to plug them into | |
8991 | the affected templates before we try to unify, in case the | |
8992 | explicit args will completely resolve the templates in question. */ | |
8993 | ||
8994 | tree expl_subargs = TREE_OPERAND (arg, 1); | |
8995 | arg = TREE_OPERAND (arg, 0); | |
8996 | ||
8997 | for (; arg; arg = OVL_NEXT (arg)) | |
8998 | { | |
8999 | tree fn = OVL_CURRENT (arg); | |
9000 | tree subargs, elem; | |
9001 | ||
9002 | if (TREE_CODE (fn) != TEMPLATE_DECL) | |
9003 | continue; | |
9004 | ||
17aec3eb RK |
9005 | subargs = get_bindings_overload (fn, DECL_TEMPLATE_RESULT (fn), |
9006 | expl_subargs); | |
34016c81 JM |
9007 | if (subargs) |
9008 | { | |
c2ea3a40 | 9009 | elem = tsubst (TREE_TYPE (fn), subargs, tf_none, NULL_TREE); |
d8f8dca1 MM |
9010 | if (TREE_CODE (elem) == METHOD_TYPE) |
9011 | elem = build_ptrmemfunc_type (build_pointer_type (elem)); | |
e97e5263 | 9012 | good += try_one_overload (tparms, targs, tempargs, parm, elem, |
4393e105 | 9013 | strict, sub_strict); |
34016c81 JM |
9014 | } |
9015 | } | |
9016 | } | |
db0f613d KL |
9017 | else if (TREE_CODE (arg) == OVERLOAD |
9018 | || TREE_CODE (arg) == FUNCTION_DECL) | |
34016c81 JM |
9019 | { |
9020 | for (; arg; arg = OVL_NEXT (arg)) | |
d8f8dca1 MM |
9021 | { |
9022 | tree type = TREE_TYPE (OVL_CURRENT (arg)); | |
9023 | if (TREE_CODE (type) == METHOD_TYPE) | |
9024 | type = build_ptrmemfunc_type (build_pointer_type (type)); | |
9025 | good += try_one_overload (tparms, targs, tempargs, parm, | |
9026 | type, | |
4393e105 | 9027 | strict, sub_strict); |
d8f8dca1 | 9028 | } |
34016c81 JM |
9029 | } |
9030 | else | |
a98facb0 | 9031 | abort (); |
34016c81 JM |
9032 | |
9033 | /* [temp.deduct.type] A template-argument can be deduced from a pointer | |
9034 | to function or pointer to member function argument if the set of | |
9035 | overloaded functions does not contain function templates and at most | |
9036 | one of a set of overloaded functions provides a unique match. | |
9037 | ||
9038 | So if we found multiple possibilities, we return success but don't | |
9039 | deduce anything. */ | |
9040 | ||
9041 | if (good == 1) | |
9042 | { | |
9043 | int i = TREE_VEC_LENGTH (targs); | |
9044 | for (; i--; ) | |
9045 | if (TREE_VEC_ELT (tempargs, i)) | |
9046 | TREE_VEC_ELT (targs, i) = TREE_VEC_ELT (tempargs, i); | |
9047 | } | |
9048 | if (good) | |
9049 | return 0; | |
9050 | ||
9051 | return 1; | |
9052 | } | |
9053 | ||
9054 | /* Subroutine of resolve_overloaded_unification; does deduction for a single | |
9055 | overload. Fills TARGS with any deduced arguments, or error_mark_node if | |
9056 | different overloads deduce different arguments for a given parm. | |
9057 | Returns 1 on success. */ | |
9058 | ||
9059 | static int | |
e97e5263 | 9060 | try_one_overload (tparms, orig_targs, targs, parm, arg, strict, |
4393e105 | 9061 | sub_strict) |
e97e5263 | 9062 | tree tparms, orig_targs, targs, parm, arg; |
34016c81 JM |
9063 | unification_kind_t strict; |
9064 | int sub_strict; | |
34016c81 JM |
9065 | { |
9066 | int nargs; | |
9067 | tree tempargs; | |
9068 | int i; | |
9069 | ||
9070 | /* [temp.deduct.type] A template-argument can be deduced from a pointer | |
9071 | to function or pointer to member function argument if the set of | |
9072 | overloaded functions does not contain function templates and at most | |
9073 | one of a set of overloaded functions provides a unique match. | |
9074 | ||
9075 | So if this is a template, just return success. */ | |
9076 | ||
9077 | if (uses_template_parms (arg)) | |
9078 | return 1; | |
9079 | ||
62e4a758 | 9080 | sub_strict |= maybe_adjust_types_for_deduction (strict, &parm, &arg); |
34016c81 JM |
9081 | |
9082 | /* We don't copy orig_targs for this because if we have already deduced | |
9083 | some template args from previous args, unify would complain when we | |
9084 | try to deduce a template parameter for the same argument, even though | |
9085 | there isn't really a conflict. */ | |
9086 | nargs = TREE_VEC_LENGTH (targs); | |
f31c0a32 | 9087 | tempargs = make_tree_vec (nargs); |
34016c81 | 9088 | |
4393e105 | 9089 | if (unify (tparms, tempargs, parm, arg, sub_strict) != 0) |
34016c81 JM |
9090 | return 0; |
9091 | ||
9092 | /* First make sure we didn't deduce anything that conflicts with | |
e97e5263 | 9093 | explicitly specified args. */ |
34016c81 JM |
9094 | for (i = nargs; i--; ) |
9095 | { | |
9096 | tree elt = TREE_VEC_ELT (tempargs, i); | |
e97e5263 | 9097 | tree oldelt = TREE_VEC_ELT (orig_targs, i); |
34016c81 JM |
9098 | |
9099 | if (elt == NULL_TREE) | |
9100 | continue; | |
9101 | else if (uses_template_parms (elt)) | |
9102 | { | |
9103 | /* Since we're unifying against ourselves, we will fill in template | |
9104 | args used in the function parm list with our own template parms. | |
9105 | Discard them. */ | |
9106 | TREE_VEC_ELT (tempargs, i) = NULL_TREE; | |
9107 | continue; | |
9108 | } | |
9109 | else if (oldelt && ! template_args_equal (oldelt, elt)) | |
9110 | return 0; | |
9111 | } | |
9112 | ||
9113 | for (i = nargs; i--; ) | |
9114 | { | |
9115 | tree elt = TREE_VEC_ELT (tempargs, i); | |
9116 | ||
9117 | if (elt) | |
9118 | TREE_VEC_ELT (targs, i) = elt; | |
9119 | } | |
9120 | ||
9121 | return 1; | |
9122 | } | |
9123 | ||
74601d7c KL |
9124 | /* Verify that nondeduce template argument agrees with the type |
9125 | obtained from argument deduction. Return nonzero if the | |
9126 | verification fails. | |
9127 | ||
9128 | For example: | |
9129 | ||
9130 | struct A { typedef int X; }; | |
9131 | template <class T, class U> struct C {}; | |
9132 | template <class T> struct C<T, typename T::X> {}; | |
9133 | ||
9134 | Then with the instantiation `C<A, int>', we can deduce that | |
9135 | `T' is `A' but unify () does not check whether `typename T::X' | |
9136 | is `int'. This function ensure that they agree. | |
9137 | ||
9138 | TARGS, PARMS are the same as the arguments of unify. | |
9139 | ARGS contains template arguments from all levels. */ | |
9140 | ||
9141 | static int | |
9142 | verify_class_unification (targs, parms, args) | |
9143 | tree targs, parms, args; | |
9144 | { | |
e2005c8d KL |
9145 | parms = tsubst (parms, add_outermost_template_args (args, targs), |
9146 | tf_none, NULL_TREE); | |
9147 | if (parms == error_mark_node) | |
74601d7c KL |
9148 | return 1; |
9149 | ||
e2005c8d | 9150 | return !comp_template_args (parms, INNERMOST_TEMPLATE_ARGS (args)); |
74601d7c KL |
9151 | } |
9152 | ||
4393e105 MM |
9153 | /* PARM is a template class (perhaps with unbound template |
9154 | parameters). ARG is a fully instantiated type. If ARG can be | |
9155 | bound to PARM, return ARG, otherwise return NULL_TREE. TPARMS and | |
9156 | TARGS are as for unify. */ | |
fcfb9f96 MM |
9157 | |
9158 | static tree | |
4393e105 | 9159 | try_class_unification (tparms, targs, parm, arg) |
fcfb9f96 MM |
9160 | tree tparms; |
9161 | tree targs; | |
4393e105 MM |
9162 | tree parm; |
9163 | tree arg; | |
9164 | { | |
4393e105 MM |
9165 | tree copy_of_targs; |
9166 | ||
9167 | if (!CLASSTYPE_TEMPLATE_INFO (arg) | |
9168 | || CLASSTYPE_TI_TEMPLATE (arg) != CLASSTYPE_TI_TEMPLATE (parm)) | |
9169 | return NULL_TREE; | |
9170 | ||
9171 | /* We need to make a new template argument vector for the call to | |
9172 | unify. If we used TARGS, we'd clutter it up with the result of | |
9173 | the attempted unification, even if this class didn't work out. | |
9174 | We also don't want to commit ourselves to all the unifications | |
9175 | we've already done, since unification is supposed to be done on | |
9176 | an argument-by-argument basis. In other words, consider the | |
9177 | following pathological case: | |
9178 | ||
9179 | template <int I, int J, int K> | |
9180 | struct S {}; | |
9181 | ||
9182 | template <int I, int J> | |
9183 | struct S<I, J, 2> : public S<I, I, I>, S<J, J, J> {}; | |
9184 | ||
9185 | template <int I, int J, int K> | |
9186 | void f(S<I, J, K>, S<I, I, I>); | |
9187 | ||
9188 | void g() { | |
9189 | S<0, 0, 0> s0; | |
9190 | S<0, 1, 2> s2; | |
9191 | ||
9192 | f(s0, s2); | |
9193 | } | |
9194 | ||
9195 | Now, by the time we consider the unification involving `s2', we | |
9196 | already know that we must have `f<0, 0, 0>'. But, even though | |
0e339752 | 9197 | `S<0, 1, 2>' is derived from `S<0, 0, 0>', the code is invalid |
4393e105 MM |
9198 | because there are two ways to unify base classes of S<0, 1, 2> |
9199 | with S<I, I, I>. If we kept the already deduced knowledge, we | |
9200 | would reject the possibility I=1. */ | |
f31c0a32 | 9201 | copy_of_targs = make_tree_vec (TREE_VEC_LENGTH (targs)); |
4393e105 MM |
9202 | |
9203 | /* If unification failed, we're done. */ | |
74601d7c KL |
9204 | if (unify (tparms, copy_of_targs, CLASSTYPE_TI_ARGS (parm), |
9205 | CLASSTYPE_TI_ARGS (arg), UNIFY_ALLOW_NONE)) | |
4393e105 | 9206 | return NULL_TREE; |
74601d7c KL |
9207 | |
9208 | return arg; | |
4393e105 MM |
9209 | } |
9210 | ||
9211 | /* Subroutine of get_template_base. RVAL, if non-NULL, is a base we | |
dc957d14 | 9212 | have already discovered to be satisfactory. ARG_BINFO is the binfo |
4393e105 MM |
9213 | for the base class of ARG that we are currently examining. */ |
9214 | ||
9215 | static tree | |
9216 | get_template_base_recursive (tparms, targs, parm, | |
9217 | arg_binfo, rval, flags) | |
9218 | tree tparms; | |
9219 | tree targs; | |
9220 | tree arg_binfo; | |
fcfb9f96 | 9221 | tree rval; |
4393e105 MM |
9222 | tree parm; |
9223 | int flags; | |
fcfb9f96 MM |
9224 | { |
9225 | tree binfos; | |
9226 | int i, n_baselinks; | |
4393e105 | 9227 | tree arg = BINFO_TYPE (arg_binfo); |
fcfb9f96 | 9228 | |
4393e105 | 9229 | if (!(flags & GTB_IGNORE_TYPE)) |
fcfb9f96 | 9230 | { |
4393e105 MM |
9231 | tree r = try_class_unification (tparms, targs, |
9232 | parm, arg); | |
fcfb9f96 | 9233 | |
4393e105 | 9234 | /* If there is more than one satisfactory baseclass, then: |
fcfb9f96 | 9235 | |
4393e105 MM |
9236 | [temp.deduct.call] |
9237 | ||
9238 | If they yield more than one possible deduced A, the type | |
9239 | deduction fails. | |
9240 | ||
9241 | applies. */ | |
9242 | if (r && rval && !same_type_p (r, rval)) | |
9243 | return error_mark_node; | |
9244 | else if (r) | |
9245 | rval = r; | |
fcfb9f96 MM |
9246 | } |
9247 | ||
4393e105 | 9248 | binfos = BINFO_BASETYPES (arg_binfo); |
fcfb9f96 MM |
9249 | n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; |
9250 | ||
9251 | /* Process base types. */ | |
9252 | for (i = 0; i < n_baselinks; i++) | |
9253 | { | |
9254 | tree base_binfo = TREE_VEC_ELT (binfos, i); | |
4393e105 | 9255 | int this_virtual; |
fcfb9f96 | 9256 | |
4393e105 MM |
9257 | /* Skip this base, if we've already seen it. */ |
9258 | if (BINFO_MARKED (base_binfo)) | |
9259 | continue; | |
9260 | ||
9261 | this_virtual = | |
9262 | (flags & GTB_VIA_VIRTUAL) || TREE_VIA_VIRTUAL (base_binfo); | |
9263 | ||
9264 | /* When searching for a non-virtual, we cannot mark virtually | |
9265 | found binfos. */ | |
9266 | if (! this_virtual) | |
dbbf88d1 | 9267 | BINFO_MARKED (base_binfo) = 1; |
4393e105 MM |
9268 | |
9269 | rval = get_template_base_recursive (tparms, targs, | |
9270 | parm, | |
9271 | base_binfo, | |
9272 | rval, | |
9273 | GTB_VIA_VIRTUAL * this_virtual); | |
9274 | ||
9275 | /* If we discovered more than one matching base class, we can | |
9276 | stop now. */ | |
9277 | if (rval == error_mark_node) | |
9278 | return error_mark_node; | |
fcfb9f96 MM |
9279 | } |
9280 | ||
9281 | return rval; | |
9282 | } | |
9283 | ||
4393e105 MM |
9284 | /* Given a template type PARM and a class type ARG, find the unique |
9285 | base type in ARG that is an instance of PARM. We do not examine | |
9286 | ARG itself; only its base-classes. If there is no appropriate base | |
9287 | class, return NULL_TREE. If there is more than one, return | |
9288 | error_mark_node. PARM may be the type of a partial specialization, | |
9289 | as well as a plain template type. Used by unify. */ | |
fcfb9f96 MM |
9290 | |
9291 | static tree | |
4393e105 | 9292 | get_template_base (tparms, targs, parm, arg) |
fcfb9f96 MM |
9293 | tree tparms; |
9294 | tree targs; | |
4393e105 MM |
9295 | tree parm; |
9296 | tree arg; | |
fcfb9f96 | 9297 | { |
4393e105 MM |
9298 | tree rval; |
9299 | tree arg_binfo; | |
fcfb9f96 | 9300 | |
4393e105 MM |
9301 | my_friendly_assert (IS_AGGR_TYPE_CODE (TREE_CODE (arg)), 92); |
9302 | ||
9303 | arg_binfo = TYPE_BINFO (complete_type (arg)); | |
9304 | rval = get_template_base_recursive (tparms, targs, | |
9305 | parm, arg_binfo, | |
9306 | NULL_TREE, | |
9307 | GTB_IGNORE_TYPE); | |
fcfb9f96 | 9308 | |
4393e105 MM |
9309 | /* Since get_template_base_recursive marks the bases classes, we |
9310 | must unmark them here. */ | |
d6479fe7 | 9311 | dfs_walk (arg_binfo, dfs_unmark, markedp, 0); |
fcfb9f96 MM |
9312 | |
9313 | return rval; | |
9314 | } | |
9315 | ||
db2767b6 MM |
9316 | /* Returns the level of DECL, which declares a template parameter. */ |
9317 | ||
e9659ab0 | 9318 | static int |
db2767b6 MM |
9319 | template_decl_level (decl) |
9320 | tree decl; | |
9321 | { | |
9322 | switch (TREE_CODE (decl)) | |
9323 | { | |
9324 | case TYPE_DECL: | |
9325 | case TEMPLATE_DECL: | |
9326 | return TEMPLATE_TYPE_LEVEL (TREE_TYPE (decl)); | |
9327 | ||
9328 | case PARM_DECL: | |
9329 | return TEMPLATE_PARM_LEVEL (DECL_INITIAL (decl)); | |
9330 | ||
9331 | default: | |
a98facb0 | 9332 | abort (); |
5ffe581d | 9333 | return 0; |
db2767b6 MM |
9334 | } |
9335 | } | |
9336 | ||
830bfa74 MM |
9337 | /* Decide whether ARG can be unified with PARM, considering only the |
9338 | cv-qualifiers of each type, given STRICT as documented for unify. | |
838dfd8a | 9339 | Returns nonzero iff the unification is OK on that basis.*/ |
e92cc029 | 9340 | |
e9659ab0 | 9341 | static int |
830bfa74 MM |
9342 | check_cv_quals_for_unify (strict, arg, parm) |
9343 | int strict; | |
9344 | tree arg; | |
9345 | tree parm; | |
9346 | { | |
4f2b0fb2 NS |
9347 | int arg_quals = cp_type_quals (arg); |
9348 | int parm_quals = cp_type_quals (parm); | |
9349 | ||
9350 | if (TREE_CODE (parm) == TEMPLATE_TYPE_PARM) | |
9351 | { | |
9352 | /* If the cvr quals of parm will not unify with ARG, they'll be | |
9353 | ignored in instantiation, so we have to do the same here. */ | |
171d2f50 | 9354 | if (TREE_CODE (arg) == REFERENCE_TYPE) |
4f2b0fb2 NS |
9355 | parm_quals &= ~(TYPE_QUAL_CONST | TYPE_QUAL_VOLATILE); |
9356 | if (!POINTER_TYPE_P (arg) && | |
9357 | TREE_CODE (arg) != TEMPLATE_TYPE_PARM) | |
9358 | parm_quals &= ~TYPE_QUAL_RESTRICT; | |
9359 | } | |
9360 | ||
62e4a758 | 9361 | if (!(strict & (UNIFY_ALLOW_MORE_CV_QUAL | UNIFY_ALLOW_OUTER_MORE_CV_QUAL)) |
4f2b0fb2 | 9362 | && (arg_quals & parm_quals) != parm_quals) |
ef637255 MM |
9363 | return 0; |
9364 | ||
62e4a758 | 9365 | if (!(strict & (UNIFY_ALLOW_LESS_CV_QUAL | UNIFY_ALLOW_OUTER_LESS_CV_QUAL)) |
4f2b0fb2 | 9366 | && (parm_quals & arg_quals) != arg_quals) |
ef637255 MM |
9367 | return 0; |
9368 | ||
ef637255 | 9369 | return 1; |
830bfa74 MM |
9370 | } |
9371 | ||
9372 | /* Takes parameters as for type_unification. Returns 0 if the | |
dc957d14 | 9373 | type deduction succeeds, 1 otherwise. The parameter STRICT is a |
830bfa74 MM |
9374 | bitwise or of the following flags: |
9375 | ||
9376 | UNIFY_ALLOW_NONE: | |
9377 | Require an exact match between PARM and ARG. | |
9378 | UNIFY_ALLOW_MORE_CV_QUAL: | |
028d1f20 NS |
9379 | Allow the deduced ARG to be more cv-qualified (by qualification |
9380 | conversion) than ARG. | |
830bfa74 MM |
9381 | UNIFY_ALLOW_LESS_CV_QUAL: |
9382 | Allow the deduced ARG to be less cv-qualified than ARG. | |
9383 | UNIFY_ALLOW_DERIVED: | |
9384 | Allow the deduced ARG to be a template base class of ARG, | |
9385 | or a pointer to a template base class of the type pointed to by | |
161c12b0 JM |
9386 | ARG. |
9387 | UNIFY_ALLOW_INTEGER: | |
9388 | Allow any integral type to be deduced. See the TEMPLATE_PARM_INDEX | |
028d1f20 NS |
9389 | case for more information. |
9390 | UNIFY_ALLOW_OUTER_LEVEL: | |
9391 | This is the outermost level of a deduction. Used to determine validity | |
9392 | of qualification conversions. A valid qualification conversion must | |
9393 | have const qualified pointers leading up to the inner type which | |
9394 | requires additional CV quals, except at the outer level, where const | |
9395 | is not required [conv.qual]. It would be normal to set this flag in | |
62e4a758 NS |
9396 | addition to setting UNIFY_ALLOW_MORE_CV_QUAL. |
9397 | UNIFY_ALLOW_OUTER_MORE_CV_QUAL: | |
9398 | This is the outermost level of a deduction, and PARM can be more CV | |
9399 | qualified at this point. | |
9400 | UNIFY_ALLOW_OUTER_LESS_CV_QUAL: | |
9401 | This is the outermost level of a deduction, and PARM can be less CV | |
d9f818d9 RS |
9402 | qualified at this point. |
9403 | UNIFY_ALLOW_MAX_CORRECTION: | |
9404 | This is an INTEGER_TYPE's maximum value. Used if the range may | |
9405 | have been derived from a size specification, such as an array size. | |
9406 | If the size was given by a nontype template parameter N, the maximum | |
9407 | value will have the form N-1. The flag says that we can (and indeed | |
9408 | must) unify N with (ARG + 1), an exception to the normal rules on | |
9409 | folding PARM. */ | |
830bfa74 | 9410 | |
e9659ab0 | 9411 | static int |
4393e105 | 9412 | unify (tparms, targs, parm, arg, strict) |
050367a3 | 9413 | tree tparms, targs, parm, arg; |
830bfa74 | 9414 | int strict; |
8d08fdba MS |
9415 | { |
9416 | int idx; | |
050367a3 | 9417 | tree targ; |
db2767b6 | 9418 | tree tparm; |
028d1f20 | 9419 | int strict_in = strict; |
8d08fdba MS |
9420 | |
9421 | /* I don't think this will do the right thing with respect to types. | |
9422 | But the only case I've seen it in so far has been array bounds, where | |
9423 | signedness is the only information lost, and I think that will be | |
9424 | okay. */ | |
9425 | while (TREE_CODE (parm) == NOP_EXPR) | |
9426 | parm = TREE_OPERAND (parm, 0); | |
9427 | ||
9428 | if (arg == error_mark_node) | |
9429 | return 1; | |
9430 | if (arg == unknown_type_node) | |
34016c81 JM |
9431 | /* We can't deduce anything from this, but we might get all the |
9432 | template args from other function args. */ | |
9433 | return 0; | |
9434 | ||
db2767b6 | 9435 | /* If PARM uses template parameters, then we can't bail out here, |
6bdb985f | 9436 | even if ARG == PARM, since we won't record unifications for the |
db2767b6 MM |
9437 | template parameters. We might need them if we're trying to |
9438 | figure out which of two things is more specialized. */ | |
9439 | if (arg == parm && !uses_template_parms (parm)) | |
8d08fdba MS |
9440 | return 0; |
9441 | ||
830bfa74 MM |
9442 | /* Immediately reject some pairs that won't unify because of |
9443 | cv-qualification mismatches. */ | |
9444 | if (TREE_CODE (arg) == TREE_CODE (parm) | |
2f939d94 | 9445 | && TYPE_P (arg) |
d0ab7624 NS |
9446 | /* It is the elements of the array which hold the cv quals of an array |
9447 | type, and the elements might be template type parms. We'll check | |
9448 | when we recurse. */ | |
9449 | && TREE_CODE (arg) != ARRAY_TYPE | |
830bfa74 MM |
9450 | /* We check the cv-qualifiers when unifying with template type |
9451 | parameters below. We want to allow ARG `const T' to unify with | |
9452 | PARM `T' for example, when computing which of two templates | |
9453 | is more specialized, for example. */ | |
9454 | && TREE_CODE (arg) != TEMPLATE_TYPE_PARM | |
028d1f20 | 9455 | && !check_cv_quals_for_unify (strict_in, arg, parm)) |
49432171 JM |
9456 | return 1; |
9457 | ||
028d1f20 | 9458 | if (!(strict & UNIFY_ALLOW_OUTER_LEVEL) |
3ea099f1 | 9459 | && TYPE_P (parm) && !CP_TYPE_CONST_P (parm)) |
028d1f20 NS |
9460 | strict &= ~UNIFY_ALLOW_MORE_CV_QUAL; |
9461 | strict &= ~UNIFY_ALLOW_OUTER_LEVEL; | |
9462 | strict &= ~UNIFY_ALLOW_DERIVED; | |
62e4a758 NS |
9463 | strict &= ~UNIFY_ALLOW_OUTER_MORE_CV_QUAL; |
9464 | strict &= ~UNIFY_ALLOW_OUTER_LESS_CV_QUAL; | |
d9f818d9 | 9465 | strict &= ~UNIFY_ALLOW_MAX_CORRECTION; |
028d1f20 | 9466 | |
8d08fdba MS |
9467 | switch (TREE_CODE (parm)) |
9468 | { | |
2ca340ae | 9469 | case TYPENAME_TYPE: |
fccef71e | 9470 | case SCOPE_REF: |
b8c6534b | 9471 | case UNBOUND_CLASS_TEMPLATE: |
2ca340ae JM |
9472 | /* In a type which contains a nested-name-specifier, template |
9473 | argument values cannot be deduced for template parameters used | |
9474 | within the nested-name-specifier. */ | |
9475 | return 0; | |
9476 | ||
8d08fdba | 9477 | case TEMPLATE_TYPE_PARM: |
73b0fce8 | 9478 | case TEMPLATE_TEMPLATE_PARM: |
a1281f45 | 9479 | case BOUND_TEMPLATE_TEMPLATE_PARM: |
db2767b6 MM |
9480 | tparm = TREE_VALUE (TREE_VEC_ELT (tparms, 0)); |
9481 | ||
9482 | if (TEMPLATE_TYPE_LEVEL (parm) | |
9483 | != template_decl_level (tparm)) | |
9484 | /* The PARM is not one we're trying to unify. Just check | |
9485 | to see if it matches ARG. */ | |
9486 | return (TREE_CODE (arg) == TREE_CODE (parm) | |
3bfdc719 | 9487 | && same_type_p (parm, arg)) ? 0 : 1; |
73b0fce8 | 9488 | idx = TEMPLATE_TYPE_IDX (parm); |
050367a3 | 9489 | targ = TREE_VEC_ELT (targs, idx); |
db2767b6 | 9490 | tparm = TREE_VALUE (TREE_VEC_ELT (tparms, idx)); |
050367a3 | 9491 | |
73b0fce8 | 9492 | /* Check for mixed types and values. */ |
db2767b6 MM |
9493 | if ((TREE_CODE (parm) == TEMPLATE_TYPE_PARM |
9494 | && TREE_CODE (tparm) != TYPE_DECL) | |
9495 | || (TREE_CODE (parm) == TEMPLATE_TEMPLATE_PARM | |
9496 | && TREE_CODE (tparm) != TEMPLATE_DECL)) | |
73b0fce8 KL |
9497 | return 1; |
9498 | ||
a1281f45 | 9499 | if (TREE_CODE (parm) == BOUND_TEMPLATE_TEMPLATE_PARM) |
73b0fce8 | 9500 | { |
b429fdf0 KL |
9501 | /* ARG must be constructed from a template class or a template |
9502 | template parameter. */ | |
9503 | if (TREE_CODE (arg) != BOUND_TEMPLATE_TEMPLATE_PARM | |
9504 | && (TREE_CODE (arg) != RECORD_TYPE || !CLASSTYPE_TEMPLATE_INFO (arg))) | |
a1281f45 | 9505 | return 1; |
73b0fce8 | 9506 | |
a1281f45 KL |
9507 | { |
9508 | tree parmtmpl = TYPE_TI_TEMPLATE (parm); | |
9509 | tree parmvec = TYPE_TI_ARGS (parm); | |
b429fdf0 | 9510 | tree argvec = TYPE_TI_ARGS (arg); |
a1281f45 | 9511 | tree argtmplvec |
b429fdf0 | 9512 | = DECL_INNERMOST_TEMPLATE_PARMS (TYPE_TI_TEMPLATE (arg)); |
a1281f45 | 9513 | int i; |
73b0fce8 | 9514 | |
a1281f45 KL |
9515 | /* The parameter and argument roles have to be switched here |
9516 | in order to handle default arguments properly. For example, | |
9517 | template<template <class> class TT> void f(TT<int>) | |
9518 | should be able to accept vector<int> which comes from | |
9519 | template <class T, class Allocator = allocator> | |
9520 | class vector. */ | |
9521 | ||
9522 | if (coerce_template_parms (argtmplvec, parmvec, parmtmpl, 0, 1) | |
9523 | == error_mark_node) | |
9524 | return 1; | |
73b0fce8 | 9525 | |
a1281f45 KL |
9526 | /* Deduce arguments T, i from TT<T> or TT<i>. |
9527 | We check each element of PARMVEC and ARGVEC individually | |
9528 | rather than the whole TREE_VEC since they can have | |
9529 | different number of elements. */ | |
6b9b6b15 | 9530 | |
a1281f45 KL |
9531 | for (i = 0; i < TREE_VEC_LENGTH (parmvec); ++i) |
9532 | { | |
9533 | tree t = TREE_VEC_ELT (parmvec, i); | |
73b0fce8 | 9534 | |
a1281f45 KL |
9535 | if (unify (tparms, targs, t, |
9536 | TREE_VEC_ELT (argvec, i), | |
9537 | UNIFY_ALLOW_NONE)) | |
9538 | return 1; | |
73b0fce8 | 9539 | } |
a1281f45 | 9540 | } |
b429fdf0 | 9541 | arg = TYPE_TI_TEMPLATE (arg); |
a1281f45 KL |
9542 | |
9543 | /* Fall through to deduce template name. */ | |
9544 | } | |
9545 | ||
9546 | if (TREE_CODE (parm) == TEMPLATE_TEMPLATE_PARM | |
9547 | || TREE_CODE (parm) == BOUND_TEMPLATE_TEMPLATE_PARM) | |
9548 | { | |
9549 | /* Deduce template name TT from TT, TT<>, TT<T> and TT<i>. */ | |
9550 | ||
9551 | /* Simple cases: Value already set, does match or doesn't. */ | |
9552 | if (targ != NULL_TREE && template_args_equal (targ, arg)) | |
9553 | return 0; | |
9554 | else if (targ) | |
9555 | return 1; | |
db2767b6 MM |
9556 | } |
9557 | else | |
9558 | { | |
9ae58faf NS |
9559 | /* If ARG is an offset type, we're trying to unify '*T' with |
9560 | 'U C::*', which is ill-formed. See the comment in the | |
9561 | POINTER_TYPE case about this ugliness. */ | |
9562 | if (TREE_CODE (arg) == OFFSET_TYPE) | |
9563 | return 1; | |
9564 | ||
830bfa74 MM |
9565 | /* If PARM is `const T' and ARG is only `int', we don't have |
9566 | a match unless we are allowing additional qualification. | |
9567 | If ARG is `const int' and PARM is just `T' that's OK; | |
9568 | that binds `const int' to `T'. */ | |
028d1f20 | 9569 | if (!check_cv_quals_for_unify (strict_in | UNIFY_ALLOW_LESS_CV_QUAL, |
830bfa74 | 9570 | arg, parm)) |
db2767b6 MM |
9571 | return 1; |
9572 | ||
830bfa74 MM |
9573 | /* Consider the case where ARG is `const volatile int' and |
9574 | PARM is `const T'. Then, T should be `volatile int'. */ | |
c2ea3a40 NS |
9575 | arg = cp_build_qualified_type_real |
9576 | (arg, cp_type_quals (arg) & ~cp_type_quals (parm), tf_none); | |
adecb3f4 MM |
9577 | if (arg == error_mark_node) |
9578 | return 1; | |
73b0fce8 | 9579 | |
a1281f45 KL |
9580 | /* Simple cases: Value already set, does match or doesn't. */ |
9581 | if (targ != NULL_TREE && same_type_p (targ, arg)) | |
9582 | return 0; | |
9583 | else if (targ) | |
9584 | return 1; | |
61cd552e | 9585 | |
94fc547c MM |
9586 | /* Make sure that ARG is not a variable-sized array. (Note |
9587 | that were talking about variable-sized arrays (like | |
9588 | `int[n]'), rather than arrays of unknown size (like | |
9589 | `int[]').) We'll get very confused by such a type since | |
9590 | the bound of the array will not be computable in an | |
9591 | instantiation. Besides, such types are not allowed in | |
9592 | ISO C++, so we can do as we please here. */ | |
9593 | if (variably_modified_type_p (arg)) | |
9594 | return 1; | |
9595 | } | |
61cd552e | 9596 | |
050367a3 | 9597 | TREE_VEC_ELT (targs, idx) = arg; |
73b0fce8 KL |
9598 | return 0; |
9599 | ||
f84b4be9 | 9600 | case TEMPLATE_PARM_INDEX: |
db2767b6 MM |
9601 | tparm = TREE_VALUE (TREE_VEC_ELT (tparms, 0)); |
9602 | ||
9603 | if (TEMPLATE_PARM_LEVEL (parm) | |
9604 | != template_decl_level (tparm)) | |
9605 | /* The PARM is not one we're trying to unify. Just check | |
9606 | to see if it matches ARG. */ | |
9607 | return (TREE_CODE (arg) == TREE_CODE (parm) | |
67ffc812 | 9608 | && cp_tree_equal (parm, arg) > 0) ? 0 : 1; |
db2767b6 | 9609 | |
f84b4be9 | 9610 | idx = TEMPLATE_PARM_IDX (parm); |
050367a3 | 9611 | targ = TREE_VEC_ELT (targs, idx); |
db2767b6 | 9612 | |
050367a3 | 9613 | if (targ) |
8d08fdba | 9614 | { |
67ffc812 | 9615 | int i = (cp_tree_equal (targ, arg) > 0); |
312e7d50 JM |
9616 | if (i == 1) |
9617 | return 0; | |
9618 | else if (i == 0) | |
9619 | return 1; | |
9620 | else | |
a98facb0 | 9621 | abort (); |
8d08fdba | 9622 | } |
8d08fdba | 9623 | |
161c12b0 JM |
9624 | /* [temp.deduct.type] If, in the declaration of a function template |
9625 | with a non-type template-parameter, the non-type | |
9626 | template-parameter is used in an expression in the function | |
9627 | parameter-list and, if the corresponding template-argument is | |
9628 | deduced, the template-argument type shall match the type of the | |
9629 | template-parameter exactly, except that a template-argument | |
d7c4edd0 NS |
9630 | deduced from an array bound may be of any integral type. |
9631 | The non-type parameter might use already deduced type parameters. */ | |
bd0d5d4a | 9632 | tparm = tsubst (TREE_TYPE (parm), targs, 0, NULL_TREE); |
e2005c8d KL |
9633 | if (!TREE_TYPE (arg)) |
9634 | /* Template-parameter dependent expression. Just accept it for now. | |
9635 | It will later be processed in convert_template_argument. */ | |
9636 | ; | |
9637 | else if (same_type_p (TREE_TYPE (arg), tparm)) | |
9638 | /* OK */; | |
161c12b0 | 9639 | else if ((strict & UNIFY_ALLOW_INTEGER) |
bd0d5d4a JM |
9640 | && (TREE_CODE (tparm) == INTEGER_TYPE |
9641 | || TREE_CODE (tparm) == BOOLEAN_TYPE)) | |
161c12b0 | 9642 | /* OK */; |
bd0d5d4a JM |
9643 | else if (uses_template_parms (tparm)) |
9644 | /* We haven't deduced the type of this parameter yet. Try again | |
9645 | later. */ | |
9646 | return 0; | |
161c12b0 JM |
9647 | else |
9648 | return 1; | |
9649 | ||
2a1e9fdd | 9650 | TREE_VEC_ELT (targs, idx) = arg; |
8d08fdba MS |
9651 | return 0; |
9652 | ||
9653 | case POINTER_TYPE: | |
830bfa74 | 9654 | { |
830bfa74 MM |
9655 | if (TREE_CODE (arg) != POINTER_TYPE) |
9656 | return 1; | |
9657 | ||
9658 | /* [temp.deduct.call] | |
9659 | ||
9660 | A can be another pointer or pointer to member type that can | |
9661 | be converted to the deduced A via a qualification | |
9662 | conversion (_conv.qual_). | |
9663 | ||
9664 | We pass down STRICT here rather than UNIFY_ALLOW_NONE. | |
9665 | This will allow for additional cv-qualification of the | |
028d1f20 | 9666 | pointed-to types if appropriate. */ |
830bfa74 | 9667 | |
028d1f20 | 9668 | if (TREE_CODE (TREE_TYPE (arg)) == RECORD_TYPE) |
830bfa74 MM |
9669 | /* The derived-to-base conversion only persists through one |
9670 | level of pointers. */ | |
028d1f20 | 9671 | strict |= (strict_in & UNIFY_ALLOW_DERIVED); |
830bfa74 | 9672 | |
3ea099f1 JM |
9673 | if (TREE_CODE (TREE_TYPE (parm)) == OFFSET_TYPE |
9674 | && TREE_CODE (TREE_TYPE (arg)) == OFFSET_TYPE) | |
9675 | { | |
9676 | /* Avoid getting confused about cv-quals; don't recurse here. | |
9677 | Pointers to members should really be just OFFSET_TYPE, not | |
c6002625 | 9678 | this two-level nonsense... */ |
3ea099f1 JM |
9679 | |
9680 | parm = TREE_TYPE (parm); | |
9681 | arg = TREE_TYPE (arg); | |
9682 | goto offset; | |
9683 | } | |
9684 | ||
a7a64a77 | 9685 | return unify (tparms, targs, TREE_TYPE (parm), |
028d1f20 | 9686 | TREE_TYPE (arg), strict); |
830bfa74 | 9687 | } |
8d08fdba MS |
9688 | |
9689 | case REFERENCE_TYPE: | |
830bfa74 MM |
9690 | if (TREE_CODE (arg) != REFERENCE_TYPE) |
9691 | return 1; | |
9692 | return unify (tparms, targs, TREE_TYPE (parm), TREE_TYPE (arg), | |
028d1f20 | 9693 | strict & UNIFY_ALLOW_MORE_CV_QUAL); |
8d08fdba MS |
9694 | |
9695 | case ARRAY_TYPE: | |
9696 | if (TREE_CODE (arg) != ARRAY_TYPE) | |
9697 | return 1; | |
3042d5be MM |
9698 | if ((TYPE_DOMAIN (parm) == NULL_TREE) |
9699 | != (TYPE_DOMAIN (arg) == NULL_TREE)) | |
9700 | return 1; | |
9701 | if (TYPE_DOMAIN (parm) != NULL_TREE | |
830bfa74 | 9702 | && unify (tparms, targs, TYPE_DOMAIN (parm), |
4393e105 | 9703 | TYPE_DOMAIN (arg), UNIFY_ALLOW_NONE) != 0) |
8d08fdba | 9704 | return 1; |
830bfa74 | 9705 | return unify (tparms, targs, TREE_TYPE (parm), TREE_TYPE (arg), |
712467a4 | 9706 | strict & UNIFY_ALLOW_MORE_CV_QUAL); |
8d08fdba MS |
9707 | |
9708 | case REAL_TYPE: | |
37c46b43 | 9709 | case COMPLEX_TYPE: |
c00996a3 | 9710 | case VECTOR_TYPE: |
8d08fdba | 9711 | case INTEGER_TYPE: |
42976354 | 9712 | case BOOLEAN_TYPE: |
5ad5a526 | 9713 | case VOID_TYPE: |
f376e137 MS |
9714 | if (TREE_CODE (arg) != TREE_CODE (parm)) |
9715 | return 1; | |
9716 | ||
514a1f18 JM |
9717 | if (TREE_CODE (parm) == INTEGER_TYPE |
9718 | && TREE_CODE (TYPE_MAX_VALUE (parm)) != INTEGER_CST) | |
8d08fdba MS |
9719 | { |
9720 | if (TYPE_MIN_VALUE (parm) && TYPE_MIN_VALUE (arg) | |
830bfa74 | 9721 | && unify (tparms, targs, TYPE_MIN_VALUE (parm), |
4393e105 | 9722 | TYPE_MIN_VALUE (arg), UNIFY_ALLOW_INTEGER)) |
8d08fdba MS |
9723 | return 1; |
9724 | if (TYPE_MAX_VALUE (parm) && TYPE_MAX_VALUE (arg) | |
830bfa74 | 9725 | && unify (tparms, targs, TYPE_MAX_VALUE (parm), |
d9f818d9 RS |
9726 | TYPE_MAX_VALUE (arg), |
9727 | UNIFY_ALLOW_INTEGER | UNIFY_ALLOW_MAX_CORRECTION)) | |
8d08fdba MS |
9728 | return 1; |
9729 | } | |
9edc3913 | 9730 | /* We have already checked cv-qualification at the top of the |
514a1f18 | 9731 | function. */ |
9edc3913 | 9732 | else if (!same_type_ignoring_top_level_qualifiers_p (arg, parm)) |
ca79f85d JM |
9733 | return 1; |
9734 | ||
8d08fdba MS |
9735 | /* As far as unification is concerned, this wins. Later checks |
9736 | will invalidate it if necessary. */ | |
9737 | return 0; | |
9738 | ||
9739 | /* Types INTEGER_CST and MINUS_EXPR can come from array bounds. */ | |
bd6dd845 | 9740 | /* Type INTEGER_CST can come from ordinary constant template args. */ |
8d08fdba | 9741 | case INTEGER_CST: |
bd6dd845 MS |
9742 | while (TREE_CODE (arg) == NOP_EXPR) |
9743 | arg = TREE_OPERAND (arg, 0); | |
9744 | ||
8d08fdba MS |
9745 | if (TREE_CODE (arg) != INTEGER_CST) |
9746 | return 1; | |
9747 | return !tree_int_cst_equal (parm, arg); | |
9748 | ||
8d08fdba MS |
9749 | case TREE_VEC: |
9750 | { | |
9751 | int i; | |
9752 | if (TREE_CODE (arg) != TREE_VEC) | |
9753 | return 1; | |
9754 | if (TREE_VEC_LENGTH (parm) != TREE_VEC_LENGTH (arg)) | |
9755 | return 1; | |
0dc09a61 | 9756 | for (i = 0; i < TREE_VEC_LENGTH (parm); ++i) |
830bfa74 | 9757 | if (unify (tparms, targs, |
8d08fdba | 9758 | TREE_VEC_ELT (parm, i), TREE_VEC_ELT (arg, i), |
4393e105 | 9759 | UNIFY_ALLOW_NONE)) |
8d08fdba MS |
9760 | return 1; |
9761 | return 0; | |
9762 | } | |
9763 | ||
8d08fdba | 9764 | case RECORD_TYPE: |
f181d4ae | 9765 | case UNION_TYPE: |
f181d4ae | 9766 | if (TREE_CODE (arg) != TREE_CODE (parm)) |
a4443a08 | 9767 | return 1; |
830bfa74 | 9768 | |
a7a64a77 MM |
9769 | if (TYPE_PTRMEMFUNC_P (parm)) |
9770 | { | |
9771 | if (!TYPE_PTRMEMFUNC_P (arg)) | |
9772 | return 1; | |
9773 | ||
9774 | return unify (tparms, targs, | |
9775 | TYPE_PTRMEMFUNC_FN_TYPE (parm), | |
9776 | TYPE_PTRMEMFUNC_FN_TYPE (arg), | |
9777 | strict); | |
9778 | } | |
9779 | ||
5db698f6 | 9780 | if (CLASSTYPE_TEMPLATE_INFO (parm)) |
5566b478 | 9781 | { |
6467930b | 9782 | tree t = NULL_TREE; |
4393e105 | 9783 | |
028d1f20 | 9784 | if (strict_in & UNIFY_ALLOW_DERIVED) |
4393e105 MM |
9785 | { |
9786 | /* First, we try to unify the PARM and ARG directly. */ | |
9787 | t = try_class_unification (tparms, targs, | |
9788 | parm, arg); | |
9789 | ||
9790 | if (!t) | |
9791 | { | |
9792 | /* Fallback to the special case allowed in | |
9793 | [temp.deduct.call]: | |
9794 | ||
9795 | If P is a class, and P has the form | |
9796 | template-id, then A can be a derived class of | |
9797 | the deduced A. Likewise, if P is a pointer to | |
9798 | a class of the form template-id, A can be a | |
9799 | pointer to a derived class pointed to by the | |
9800 | deduced A. */ | |
9801 | t = get_template_base (tparms, targs, | |
9802 | parm, arg); | |
9803 | ||
9804 | if (! t || t == error_mark_node) | |
9805 | return 1; | |
9806 | } | |
9807 | } | |
6df47b06 | 9808 | else if (CLASSTYPE_TEMPLATE_INFO (arg) |
9fbf56f7 MM |
9809 | && (CLASSTYPE_TI_TEMPLATE (parm) |
9810 | == CLASSTYPE_TI_TEMPLATE (arg))) | |
6df47b06 MM |
9811 | /* Perhaps PARM is something like S<U> and ARG is S<int>. |
9812 | Then, we should unify `int' and `U'. */ | |
6467930b | 9813 | t = arg; |
4393e105 | 9814 | else |
dc957d14 | 9815 | /* There's no chance of unification succeeding. */ |
5566b478 | 9816 | return 1; |
6467930b | 9817 | |
830bfa74 | 9818 | return unify (tparms, targs, CLASSTYPE_TI_ARGS (parm), |
4393e105 | 9819 | CLASSTYPE_TI_ARGS (t), UNIFY_ALLOW_NONE); |
5566b478 | 9820 | } |
9edc3913 | 9821 | else if (!same_type_ignoring_top_level_qualifiers_p (parm, arg)) |
5566b478 | 9822 | return 1; |
a4443a08 | 9823 | return 0; |
8d08fdba MS |
9824 | |
9825 | case METHOD_TYPE: | |
8d08fdba | 9826 | case FUNCTION_TYPE: |
830bfa74 | 9827 | if (TREE_CODE (arg) != TREE_CODE (parm)) |
8d08fdba | 9828 | return 1; |
830bfa74 MM |
9829 | |
9830 | if (unify (tparms, targs, TREE_TYPE (parm), | |
4393e105 | 9831 | TREE_TYPE (arg), UNIFY_ALLOW_NONE)) |
28cbf42c | 9832 | return 1; |
386b8a85 | 9833 | return type_unification_real (tparms, targs, TYPE_ARG_TYPES (parm), |
3b3ba9f0 | 9834 | TYPE_ARG_TYPES (arg), 1, |
e5214479 | 9835 | DEDUCE_EXACT, 0, -1); |
a4443a08 MS |
9836 | |
9837 | case OFFSET_TYPE: | |
3ea099f1 | 9838 | offset: |
a4443a08 MS |
9839 | if (TREE_CODE (arg) != OFFSET_TYPE) |
9840 | return 1; | |
830bfa74 | 9841 | if (unify (tparms, targs, TYPE_OFFSET_BASETYPE (parm), |
4393e105 | 9842 | TYPE_OFFSET_BASETYPE (arg), UNIFY_ALLOW_NONE)) |
a4443a08 | 9843 | return 1; |
830bfa74 | 9844 | return unify (tparms, targs, TREE_TYPE (parm), TREE_TYPE (arg), |
4393e105 | 9845 | strict); |
a4443a08 | 9846 | |
f62dbf03 | 9847 | case CONST_DECL: |
a723baf1 MM |
9848 | if (DECL_TEMPLATE_PARM_P (parm)) |
9849 | return unify (tparms, targs, DECL_INITIAL (parm), arg, strict); | |
830bfa74 | 9850 | if (arg != decl_constant_value (parm)) |
f62dbf03 JM |
9851 | return 1; |
9852 | return 0; | |
9853 | ||
027905b4 KL |
9854 | case TEMPLATE_DECL: |
9855 | /* Matched cases are handled by the ARG == PARM test above. */ | |
9856 | return 1; | |
9857 | ||
53929c47 | 9858 | case MINUS_EXPR: |
d9f818d9 RS |
9859 | if (tree_int_cst_equal (TREE_OPERAND (parm, 1), integer_one_node) |
9860 | && (strict_in & UNIFY_ALLOW_MAX_CORRECTION)) | |
53929c47 JM |
9861 | { |
9862 | /* We handle this case specially, since it comes up with | |
9863 | arrays. In particular, something like: | |
9864 | ||
9865 | template <int N> void f(int (&x)[N]); | |
9866 | ||
9867 | Here, we are trying to unify the range type, which | |
9868 | looks like [0 ... (N - 1)]. */ | |
9869 | tree t, t1, t2; | |
9870 | t1 = TREE_OPERAND (parm, 0); | |
9871 | t2 = TREE_OPERAND (parm, 1); | |
9872 | ||
24e2e58e | 9873 | t = fold (build (PLUS_EXPR, integer_type_node, arg, t2)); |
53929c47 | 9874 | |
4393e105 | 9875 | return unify (tparms, targs, t1, t, strict); |
53929c47 JM |
9876 | } |
9877 | /* else fall through */ | |
9878 | ||
8d08fdba | 9879 | default: |
050367a3 | 9880 | if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (TREE_CODE (parm)))) |
74601d7c KL |
9881 | { |
9882 | ||
9883 | /* We're looking at an expression. This can happen with | |
9884 | something like: | |
4393e105 | 9885 | |
74601d7c KL |
9886 | template <int I> |
9887 | void foo(S<I>, S<I + 2>); | |
050367a3 | 9888 | |
74601d7c | 9889 | This is a "nondeduced context": |
050367a3 | 9890 | |
74601d7c | 9891 | [deduct.type] |
4393e105 | 9892 | |
74601d7c | 9893 | The nondeduced contexts are: |
050367a3 | 9894 | |
74601d7c KL |
9895 | --A type that is a template-id in which one or more of |
9896 | the template-arguments is an expression that references | |
9897 | a template-parameter. | |
050367a3 | 9898 | |
74601d7c KL |
9899 | In these cases, we assume deduction succeeded, but don't |
9900 | actually infer any unifications. */ | |
9901 | ||
9902 | if (!uses_template_parms (parm) | |
9903 | && !template_args_equal (parm, arg)) | |
9904 | return 1; | |
9905 | else | |
9906 | return 0; | |
9907 | } | |
050367a3 | 9908 | else |
b4c4a9ec MM |
9909 | sorry ("use of `%s' in template type unification", |
9910 | tree_code_name [(int) TREE_CODE (parm)]); | |
050367a3 | 9911 | |
8d08fdba MS |
9912 | return 1; |
9913 | } | |
9914 | } | |
8d08fdba | 9915 | \f |
03d0f4af MM |
9916 | /* Called if RESULT is explicitly instantiated, or is a member of an |
9917 | explicitly instantiated class, or if using -frepo and the | |
9918 | instantiation of RESULT has been assigned to this file. */ | |
9919 | ||
faae18ab | 9920 | void |
5566b478 | 9921 | mark_decl_instantiated (result, extern_p) |
faae18ab MS |
9922 | tree result; |
9923 | int extern_p; | |
9924 | { | |
3ae18eaf JM |
9925 | /* We used to set this unconditionally; we moved that to |
9926 | do_decl_instantiation so it wouldn't get set on members of | |
9927 | explicit class template instantiations. But we still need to set | |
9928 | it here for the 'extern template' case in order to suppress | |
9929 | implicit instantiations. */ | |
9930 | if (extern_p) | |
9931 | SET_DECL_EXPLICIT_INSTANTIATION (result); | |
9932 | ||
1f6f0cb6 MM |
9933 | /* If this entity has already been written out, it's too late to |
9934 | make any modifications. */ | |
9935 | if (TREE_ASM_WRITTEN (result)) | |
9936 | return; | |
9937 | ||
9938 | if (TREE_CODE (result) != FUNCTION_DECL) | |
9939 | /* The TREE_PUBLIC flag for function declarations will have been | |
9940 | set correctly by tsubst. */ | |
9941 | TREE_PUBLIC (result) = 1; | |
9942 | ||
faae18ab MS |
9943 | if (! extern_p) |
9944 | { | |
9945 | DECL_INTERFACE_KNOWN (result) = 1; | |
9946 | DECL_NOT_REALLY_EXTERN (result) = 1; | |
a7d87521 | 9947 | |
1a408d07 JM |
9948 | /* Always make artificials weak. */ |
9949 | if (DECL_ARTIFICIAL (result) && flag_weak) | |
9950 | comdat_linkage (result); | |
a7d87521 JM |
9951 | /* For WIN32 we also want to put explicit instantiations in |
9952 | linkonce sections. */ | |
1a408d07 | 9953 | else if (TREE_PUBLIC (result)) |
b385c841 | 9954 | maybe_make_one_only (result); |
faae18ab | 9955 | } |
1f6f0cb6 MM |
9956 | |
9957 | if (TREE_CODE (result) == FUNCTION_DECL) | |
56e770bf | 9958 | defer_fn (result); |
faae18ab MS |
9959 | } |
9960 | ||
e5214479 | 9961 | /* Given two function templates PAT1 and PAT2, return: |
6467930b | 9962 | |
62e4a758 NS |
9963 | DEDUCE should be DEDUCE_EXACT or DEDUCE_ORDER. |
9964 | ||
6467930b MS |
9965 | 1 if PAT1 is more specialized than PAT2 as described in [temp.func.order]. |
9966 | -1 if PAT2 is more specialized than PAT1. | |
e5214479 JM |
9967 | 0 if neither is more specialized. |
9968 | ||
9969 | LEN is passed through to fn_type_unification. */ | |
6467930b MS |
9970 | |
9971 | int | |
62e4a758 | 9972 | more_specialized (pat1, pat2, deduce, len) |
e5214479 | 9973 | tree pat1, pat2; |
62e4a758 | 9974 | int deduce; |
e5214479 | 9975 | int len; |
6467930b | 9976 | { |
98c1c668 | 9977 | tree targs; |
73aad9b9 | 9978 | int winner = 0; |
6467930b | 9979 | |
62e4a758 NS |
9980 | targs = get_bindings_real (pat1, DECL_TEMPLATE_RESULT (pat2), |
9981 | NULL_TREE, 0, deduce, len); | |
73aad9b9 | 9982 | if (targs) |
36a117a5 | 9983 | --winner; |
6467930b | 9984 | |
62e4a758 NS |
9985 | targs = get_bindings_real (pat2, DECL_TEMPLATE_RESULT (pat1), |
9986 | NULL_TREE, 0, deduce, len); | |
73aad9b9 | 9987 | if (targs) |
36a117a5 | 9988 | ++winner; |
6467930b | 9989 | |
73aad9b9 JM |
9990 | return winner; |
9991 | } | |
6467930b | 9992 | |
73aad9b9 | 9993 | /* Given two class template specialization list nodes PAT1 and PAT2, return: |
6467930b | 9994 | |
73aad9b9 JM |
9995 | 1 if PAT1 is more specialized than PAT2 as described in [temp.class.order]. |
9996 | -1 if PAT2 is more specialized than PAT1. | |
9997 | 0 if neither is more specialized. */ | |
9998 | ||
9999 | int | |
10000 | more_specialized_class (pat1, pat2) | |
10001 | tree pat1, pat2; | |
10002 | { | |
10003 | tree targs; | |
10004 | int winner = 0; | |
10005 | ||
36a117a5 MM |
10006 | targs = get_class_bindings (TREE_VALUE (pat1), TREE_PURPOSE (pat1), |
10007 | TREE_PURPOSE (pat2)); | |
73aad9b9 JM |
10008 | if (targs) |
10009 | --winner; | |
10010 | ||
36a117a5 MM |
10011 | targs = get_class_bindings (TREE_VALUE (pat2), TREE_PURPOSE (pat2), |
10012 | TREE_PURPOSE (pat1)); | |
73aad9b9 | 10013 | if (targs) |
6467930b MS |
10014 | ++winner; |
10015 | ||
10016 | return winner; | |
10017 | } | |
73aad9b9 JM |
10018 | |
10019 | /* Return the template arguments that will produce the function signature | |
e1467ff2 | 10020 | DECL from the function template FN, with the explicit template |
76b9a14d | 10021 | arguments EXPLICIT_ARGS. If CHECK_RETTYPE is 1, the return type must |
4393e105 | 10022 | also match. Return NULL_TREE if no satisfactory arguments could be |
62e4a758 | 10023 | found. DEDUCE and LEN are passed through to fn_type_unification. */ |
e5214479 | 10024 | |
76b9a14d | 10025 | static tree |
62e4a758 | 10026 | get_bindings_real (fn, decl, explicit_args, check_rettype, deduce, len) |
e1467ff2 | 10027 | tree fn, decl, explicit_args; |
62e4a758 | 10028 | int check_rettype, deduce, len; |
73aad9b9 | 10029 | { |
98c1c668 | 10030 | int ntparms = DECL_NTPARMS (fn); |
f31c0a32 | 10031 | tree targs = make_tree_vec (ntparms); |
4393e105 | 10032 | tree decl_type; |
03017874 | 10033 | tree decl_arg_types; |
98c1c668 JM |
10034 | int i; |
10035 | ||
4393e105 MM |
10036 | /* Substitute the explicit template arguments into the type of DECL. |
10037 | The call to fn_type_unification will handle substitution into the | |
10038 | FN. */ | |
10039 | decl_type = TREE_TYPE (decl); | |
10040 | if (explicit_args && uses_template_parms (decl_type)) | |
10041 | { | |
10042 | tree tmpl; | |
10043 | tree converted_args; | |
10044 | ||
10045 | if (DECL_TEMPLATE_INFO (decl)) | |
10046 | tmpl = DECL_TI_TEMPLATE (decl); | |
10047 | else | |
0e339752 | 10048 | /* We can get here for some invalid specializations. */ |
4393e105 MM |
10049 | return NULL_TREE; |
10050 | ||
10051 | converted_args | |
10052 | = (coerce_template_parms (DECL_INNERMOST_TEMPLATE_PARMS (tmpl), | |
10053 | explicit_args, NULL_TREE, | |
c2ea3a40 | 10054 | tf_none, /*require_all_arguments=*/0)); |
4393e105 MM |
10055 | if (converted_args == error_mark_node) |
10056 | return NULL_TREE; | |
10057 | ||
c2ea3a40 | 10058 | decl_type = tsubst (decl_type, converted_args, tf_none, NULL_TREE); |
4393e105 MM |
10059 | if (decl_type == error_mark_node) |
10060 | return NULL_TREE; | |
10061 | } | |
10062 | ||
10063 | decl_arg_types = TYPE_ARG_TYPES (decl_type); | |
e5214479 JM |
10064 | /* Never do unification on the 'this' parameter. */ |
10065 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)) | |
03017874 | 10066 | decl_arg_types = TREE_CHAIN (decl_arg_types); |
d7684f2d | 10067 | |
e1467ff2 | 10068 | i = fn_type_unification (fn, explicit_args, targs, |
03017874 | 10069 | decl_arg_types, |
8d3631f8 NS |
10070 | (check_rettype || DECL_CONV_FN_P (fn) |
10071 | ? TREE_TYPE (decl_type) : NULL_TREE), | |
62e4a758 | 10072 | deduce, len); |
98c1c668 | 10073 | |
76b9a14d JM |
10074 | if (i != 0) |
10075 | return NULL_TREE; | |
10076 | ||
76b9a14d JM |
10077 | return targs; |
10078 | } | |
10079 | ||
10080 | /* For most uses, we want to check the return type. */ | |
10081 | ||
10082 | tree | |
10083 | get_bindings (fn, decl, explicit_args) | |
10084 | tree fn, decl, explicit_args; | |
10085 | { | |
62e4a758 | 10086 | return get_bindings_real (fn, decl, explicit_args, 1, DEDUCE_EXACT, -1); |
76b9a14d JM |
10087 | } |
10088 | ||
e5214479 JM |
10089 | /* But for resolve_overloaded_unification, we only care about the parameter |
10090 | types. */ | |
76b9a14d JM |
10091 | |
10092 | static tree | |
10093 | get_bindings_overload (fn, decl, explicit_args) | |
10094 | tree fn, decl, explicit_args; | |
10095 | { | |
62e4a758 | 10096 | return get_bindings_real (fn, decl, explicit_args, 0, DEDUCE_EXACT, -1); |
73aad9b9 JM |
10097 | } |
10098 | ||
36a117a5 MM |
10099 | /* Return the innermost template arguments that, when applied to a |
10100 | template specialization whose innermost template parameters are | |
9471d3e2 | 10101 | TPARMS, and whose specialization arguments are PARMS, yield the |
36a117a5 MM |
10102 | ARGS. |
10103 | ||
10104 | For example, suppose we have: | |
10105 | ||
10106 | template <class T, class U> struct S {}; | |
10107 | template <class T> struct S<T*, int> {}; | |
10108 | ||
10109 | Then, suppose we want to get `S<double*, int>'. The TPARMS will be | |
10110 | {T}, the PARMS will be {T*, int} and the ARGS will be {double*, | |
10111 | int}. The resulting vector will be {double}, indicating that `T' | |
10112 | is bound to `double'. */ | |
10113 | ||
bd6dd845 | 10114 | static tree |
36a117a5 MM |
10115 | get_class_bindings (tparms, parms, args) |
10116 | tree tparms, parms, args; | |
73aad9b9 | 10117 | { |
3b3ba9f0 | 10118 | int i, ntparms = TREE_VEC_LENGTH (tparms); |
f31c0a32 | 10119 | tree vec = make_tree_vec (ntparms); |
73aad9b9 | 10120 | |
74601d7c KL |
10121 | if (unify (tparms, vec, parms, INNERMOST_TEMPLATE_ARGS (args), |
10122 | UNIFY_ALLOW_NONE)) | |
fcfb9f96 | 10123 | return NULL_TREE; |
73aad9b9 JM |
10124 | |
10125 | for (i = 0; i < ntparms; ++i) | |
10126 | if (! TREE_VEC_ELT (vec, i)) | |
10127 | return NULL_TREE; | |
10128 | ||
74601d7c KL |
10129 | if (verify_class_unification (vec, parms, args)) |
10130 | return NULL_TREE; | |
10131 | ||
73aad9b9 JM |
10132 | return vec; |
10133 | } | |
10134 | ||
104bf76a MM |
10135 | /* In INSTANTIATIONS is a list of <INSTANTIATION, TEMPLATE> pairs. |
10136 | Pick the most specialized template, and return the corresponding | |
10137 | instantiation, or if there is no corresponding instantiation, the | |
e5214479 JM |
10138 | template itself. If there is no most specialized template, |
10139 | error_mark_node is returned. If there are no templates at all, | |
10140 | NULL_TREE is returned. */ | |
73aad9b9 JM |
10141 | |
10142 | tree | |
e5214479 | 10143 | most_specialized_instantiation (instantiations) |
104bf76a | 10144 | tree instantiations; |
73aad9b9 | 10145 | { |
104bf76a | 10146 | tree fn, champ; |
73aad9b9 JM |
10147 | int fate; |
10148 | ||
104bf76a | 10149 | if (!instantiations) |
73aad9b9 JM |
10150 | return NULL_TREE; |
10151 | ||
104bf76a MM |
10152 | champ = instantiations; |
10153 | for (fn = TREE_CHAIN (instantiations); fn; fn = TREE_CHAIN (fn)) | |
73aad9b9 | 10154 | { |
62e4a758 NS |
10155 | fate = more_specialized (TREE_VALUE (champ), TREE_VALUE (fn), |
10156 | DEDUCE_EXACT, -1); | |
73aad9b9 JM |
10157 | if (fate == 1) |
10158 | ; | |
10159 | else | |
10160 | { | |
10161 | if (fate == 0) | |
10162 | { | |
10163 | fn = TREE_CHAIN (fn); | |
10164 | if (! fn) | |
10165 | return error_mark_node; | |
10166 | } | |
104bf76a | 10167 | champ = fn; |
73aad9b9 JM |
10168 | } |
10169 | } | |
10170 | ||
104bf76a | 10171 | for (fn = instantiations; fn && fn != champ; fn = TREE_CHAIN (fn)) |
73aad9b9 | 10172 | { |
62e4a758 NS |
10173 | fate = more_specialized (TREE_VALUE (champ), TREE_VALUE (fn), |
10174 | DEDUCE_EXACT, -1); | |
73aad9b9 JM |
10175 | if (fate != 1) |
10176 | return error_mark_node; | |
10177 | } | |
10178 | ||
104bf76a MM |
10179 | return TREE_PURPOSE (champ) ? TREE_PURPOSE (champ) : TREE_VALUE (champ); |
10180 | } | |
10181 | ||
10182 | /* Return the most specialized of the list of templates in FNS that can | |
10183 | produce an instantiation matching DECL, given the explicit template | |
10184 | arguments EXPLICIT_ARGS. */ | |
10185 | ||
e9659ab0 | 10186 | static tree |
104bf76a MM |
10187 | most_specialized (fns, decl, explicit_args) |
10188 | tree fns, decl, explicit_args; | |
10189 | { | |
10190 | tree candidates = NULL_TREE; | |
10191 | tree fn, args; | |
10192 | ||
10193 | for (fn = fns; fn; fn = TREE_CHAIN (fn)) | |
10194 | { | |
10195 | tree candidate = TREE_VALUE (fn); | |
10196 | ||
10197 | args = get_bindings (candidate, decl, explicit_args); | |
10198 | if (args) | |
e1b3e07d | 10199 | candidates = tree_cons (NULL_TREE, candidate, candidates); |
104bf76a MM |
10200 | } |
10201 | ||
e5214479 | 10202 | return most_specialized_instantiation (candidates); |
73aad9b9 JM |
10203 | } |
10204 | ||
36a117a5 | 10205 | /* If DECL is a specialization of some template, return the most |
f9a7ae04 MM |
10206 | general such template. Otherwise, returns NULL_TREE. |
10207 | ||
10208 | For example, given: | |
36a117a5 MM |
10209 | |
10210 | template <class T> struct S { template <class U> void f(U); }; | |
10211 | ||
10212 | if TMPL is `template <class U> void S<int>::f(U)' this will return | |
10213 | the full template. This function will not trace past partial | |
10214 | specializations, however. For example, given in addition: | |
10215 | ||
10216 | template <class T> struct S<T*> { template <class U> void f(U); }; | |
10217 | ||
10218 | if TMPL is `template <class U> void S<int*>::f(U)' this will return | |
10219 | `template <class T> template <class U> S<T*>::f(U)'. */ | |
73aad9b9 | 10220 | |
612c671a | 10221 | tree |
36a117a5 MM |
10222 | most_general_template (decl) |
10223 | tree decl; | |
73aad9b9 | 10224 | { |
f9a7ae04 MM |
10225 | /* If DECL is a FUNCTION_DECL, find the TEMPLATE_DECL of which it is |
10226 | an immediate specialization. */ | |
10227 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
10228 | { | |
10229 | if (DECL_TEMPLATE_INFO (decl)) { | |
10230 | decl = DECL_TI_TEMPLATE (decl); | |
10231 | ||
10232 | /* The DECL_TI_TEMPLATE can be an IDENTIFIER_NODE for a | |
10233 | template friend. */ | |
10234 | if (TREE_CODE (decl) != TEMPLATE_DECL) | |
10235 | return NULL_TREE; | |
10236 | } else | |
10237 | return NULL_TREE; | |
10238 | } | |
10239 | ||
10240 | /* Look for more and more general templates. */ | |
10241 | while (DECL_TEMPLATE_INFO (decl)) | |
10242 | { | |
10243 | /* The DECL_TI_TEMPLATE can be a LOOKUP_EXPR or IDENTIFIER_NODE | |
10244 | in some cases. (See cp-tree.h for details.) */ | |
10245 | if (TREE_CODE (DECL_TI_TEMPLATE (decl)) != TEMPLATE_DECL) | |
10246 | break; | |
10247 | ||
6e049fcd KL |
10248 | if (CLASS_TYPE_P (TREE_TYPE (decl)) |
10249 | && CLASSTYPE_TEMPLATE_SPECIALIZATION (TREE_TYPE (decl))) | |
10250 | break; | |
10251 | ||
f9a7ae04 MM |
10252 | /* Stop if we run into an explicitly specialized class template. */ |
10253 | if (!DECL_NAMESPACE_SCOPE_P (decl) | |
10254 | && DECL_CONTEXT (decl) | |
10255 | && CLASSTYPE_TEMPLATE_SPECIALIZATION (DECL_CONTEXT (decl))) | |
10256 | break; | |
10257 | ||
10258 | decl = DECL_TI_TEMPLATE (decl); | |
10259 | } | |
36a117a5 MM |
10260 | |
10261 | return decl; | |
10262 | } | |
10263 | ||
10264 | /* Return the most specialized of the class template specializations | |
10265 | of TMPL which can produce an instantiation matching ARGS, or | |
10266 | error_mark_node if the choice is ambiguous. */ | |
10267 | ||
e9659ab0 | 10268 | static tree |
36a117a5 MM |
10269 | most_specialized_class (tmpl, args) |
10270 | tree tmpl; | |
10271 | tree args; | |
10272 | { | |
10273 | tree list = NULL_TREE; | |
10274 | tree t; | |
10275 | tree champ; | |
73aad9b9 JM |
10276 | int fate; |
10277 | ||
36a117a5 MM |
10278 | tmpl = most_general_template (tmpl); |
10279 | for (t = DECL_TEMPLATE_SPECIALIZATIONS (tmpl); t; t = TREE_CHAIN (t)) | |
73aad9b9 | 10280 | { |
36a117a5 MM |
10281 | tree spec_args |
10282 | = get_class_bindings (TREE_VALUE (t), TREE_PURPOSE (t), args); | |
10283 | if (spec_args) | |
73aad9b9 | 10284 | { |
1f8f4a0b | 10285 | list = tree_cons (TREE_PURPOSE (t), TREE_VALUE (t), list); |
73aad9b9 JM |
10286 | TREE_TYPE (list) = TREE_TYPE (t); |
10287 | } | |
10288 | } | |
10289 | ||
10290 | if (! list) | |
10291 | return NULL_TREE; | |
10292 | ||
10293 | t = list; | |
10294 | champ = t; | |
10295 | t = TREE_CHAIN (t); | |
10296 | for (; t; t = TREE_CHAIN (t)) | |
10297 | { | |
10298 | fate = more_specialized_class (champ, t); | |
10299 | if (fate == 1) | |
10300 | ; | |
10301 | else | |
10302 | { | |
10303 | if (fate == 0) | |
10304 | { | |
10305 | t = TREE_CHAIN (t); | |
10306 | if (! t) | |
10307 | return error_mark_node; | |
10308 | } | |
10309 | champ = t; | |
10310 | } | |
10311 | } | |
10312 | ||
10313 | for (t = list; t && t != champ; t = TREE_CHAIN (t)) | |
10314 | { | |
85b71cf2 | 10315 | fate = more_specialized_class (champ, t); |
73aad9b9 JM |
10316 | if (fate != 1) |
10317 | return error_mark_node; | |
10318 | } | |
10319 | ||
10320 | return champ; | |
10321 | } | |
10322 | ||
eb8845be | 10323 | /* Explicitly instantiate DECL. */ |
e92cc029 | 10324 | |
8d08fdba | 10325 | void |
eb8845be | 10326 | do_decl_instantiation (tree decl, tree storage) |
8d08fdba | 10327 | { |
8d08fdba | 10328 | tree result = NULL_TREE; |
faae18ab | 10329 | int extern_p = 0; |
e8abc66f | 10330 | |
3fa56191 | 10331 | if (!decl) |
dc957d14 | 10332 | /* An error occurred, for which grokdeclarator has already issued |
3fa56191 MM |
10333 | an appropriate message. */ |
10334 | return; | |
10335 | else if (! DECL_LANG_SPECIFIC (decl)) | |
ec255269 | 10336 | { |
33bd39a2 | 10337 | error ("explicit instantiation of non-template `%#D'", decl); |
ec255269 MS |
10338 | return; |
10339 | } | |
03d0f4af | 10340 | else if (TREE_CODE (decl) == VAR_DECL) |
6633d636 | 10341 | { |
03d0f4af MM |
10342 | /* There is an asymmetry here in the way VAR_DECLs and |
10343 | FUNCTION_DECLs are handled by grokdeclarator. In the case of | |
10344 | the latter, the DECL we get back will be marked as a | |
10345 | template instantiation, and the appropriate | |
10346 | DECL_TEMPLATE_INFO will be set up. This does not happen for | |
10347 | VAR_DECLs so we do the lookup here. Probably, grokdeclarator | |
10348 | should handle VAR_DECLs as it currently handles | |
10349 | FUNCTION_DECLs. */ | |
86ac0575 | 10350 | result = lookup_field (DECL_CONTEXT (decl), DECL_NAME (decl), 0, false); |
e0860732 | 10351 | if (!result || TREE_CODE (result) != VAR_DECL) |
03d0f4af | 10352 | { |
e0860732 | 10353 | error ("no matching template for `%D' found", decl); |
03d0f4af MM |
10354 | return; |
10355 | } | |
6633d636 MS |
10356 | } |
10357 | else if (TREE_CODE (decl) != FUNCTION_DECL) | |
10358 | { | |
33bd39a2 | 10359 | error ("explicit instantiation of `%#D'", decl); |
6633d636 MS |
10360 | return; |
10361 | } | |
03d0f4af MM |
10362 | else |
10363 | result = decl; | |
672476cb | 10364 | |
03d0f4af | 10365 | /* Check for various error cases. Note that if the explicit |
0e339752 | 10366 | instantiation is valid the RESULT will currently be marked as an |
03d0f4af MM |
10367 | *implicit* instantiation; DECL_EXPLICIT_INSTANTIATION is not set |
10368 | until we get here. */ | |
10369 | ||
10370 | if (DECL_TEMPLATE_SPECIALIZATION (result)) | |
672476cb | 10371 | { |
07782718 KL |
10372 | /* DR 259 [temp.spec]. |
10373 | ||
10374 | Both an explicit instantiation and a declaration of an explicit | |
10375 | specialization shall not appear in a program unless the explicit | |
10376 | instantiation follows a declaration of the explicit specialization. | |
03d0f4af | 10377 | |
07782718 KL |
10378 | For a given set of template parameters, if an explicit |
10379 | instantiation of a template appears after a declaration of an | |
10380 | explicit specialization for that template, the explicit | |
10381 | instantiation has no effect. */ | |
672476cb MM |
10382 | return; |
10383 | } | |
03d0f4af MM |
10384 | else if (DECL_EXPLICIT_INSTANTIATION (result)) |
10385 | { | |
10386 | /* [temp.spec] | |
98c1c668 | 10387 | |
03d0f4af MM |
10388 | No program shall explicitly instantiate any template more |
10389 | than once. | |
10390 | ||
2aaf816d JM |
10391 | We check DECL_INTERFACE_KNOWN so as not to complain when the first |
10392 | instantiation was `extern' and the second is not, and EXTERN_P for | |
10393 | the opposite case. If -frepo, chances are we already got marked | |
dc957d14 | 10394 | as an explicit instantiation because of the repo file. */ |
2aaf816d | 10395 | if (DECL_INTERFACE_KNOWN (result) && !extern_p && !flag_use_repository) |
33bd39a2 | 10396 | pedwarn ("duplicate explicit instantiation of `%#D'", result); |
03d0f4af MM |
10397 | |
10398 | /* If we've already instantiated the template, just return now. */ | |
10399 | if (DECL_INTERFACE_KNOWN (result)) | |
10400 | return; | |
10401 | } | |
10402 | else if (!DECL_IMPLICIT_INSTANTIATION (result)) | |
faae18ab | 10403 | { |
33bd39a2 | 10404 | error ("no matching template for `%D' found", result); |
faae18ab MS |
10405 | return; |
10406 | } | |
03d0f4af | 10407 | else if (!DECL_TEMPLATE_INFO (result)) |
6633d636 | 10408 | { |
33bd39a2 | 10409 | pedwarn ("explicit instantiation of non-template `%#D'", result); |
6633d636 MS |
10410 | return; |
10411 | } | |
10412 | ||
a0a33927 MS |
10413 | if (flag_external_templates) |
10414 | return; | |
10415 | ||
f0e01782 | 10416 | if (storage == NULL_TREE) |
00595019 | 10417 | ; |
faae18ab | 10418 | else if (storage == ridpointers[(int) RID_EXTERN]) |
03d0f4af | 10419 | { |
c02f5e29 | 10420 | if (pedantic && !in_system_header) |
33bd39a2 | 10421 | pedwarn ("ISO C++ forbids the use of `extern' on explicit instantiations"); |
03d0f4af MM |
10422 | extern_p = 1; |
10423 | } | |
f0e01782 | 10424 | else |
33bd39a2 | 10425 | error ("storage class `%D' applied to template instantiation", |
f0e01782 | 10426 | storage); |
5566b478 | 10427 | |
03d0f4af | 10428 | SET_DECL_EXPLICIT_INSTANTIATION (result); |
5566b478 | 10429 | mark_decl_instantiated (result, extern_p); |
44a8d0b3 | 10430 | repo_template_instantiated (result, extern_p); |
c91a56d2 | 10431 | if (! extern_p) |
16d53b64 | 10432 | instantiate_decl (result, /*defer_ok=*/1); |
7177d104 MS |
10433 | } |
10434 | ||
faae18ab MS |
10435 | void |
10436 | mark_class_instantiated (t, extern_p) | |
10437 | tree t; | |
10438 | int extern_p; | |
10439 | { | |
10440 | SET_CLASSTYPE_EXPLICIT_INSTANTIATION (t); | |
eb773359 JM |
10441 | SET_CLASSTYPE_INTERFACE_KNOWN (t); |
10442 | CLASSTYPE_INTERFACE_ONLY (t) = extern_p; | |
faae18ab MS |
10443 | TYPE_DECL_SUPPRESS_DEBUG (TYPE_NAME (t)) = extern_p; |
10444 | if (! extern_p) | |
10445 | { | |
10446 | CLASSTYPE_DEBUG_REQUESTED (t) = 1; | |
10447 | rest_of_type_compilation (t, 1); | |
10448 | } | |
10449 | } | |
e8abc66f | 10450 | |
a1bcc528 JM |
10451 | /* Perform an explicit instantiation of template class T. STORAGE, if |
10452 | non-null, is the RID for extern, inline or static. COMPLAIN is | |
838dfd8a | 10453 | nonzero if this is called from the parser, zero if called recursively, |
a1bcc528 JM |
10454 | since the standard is unclear (as detailed below). */ |
10455 | ||
7177d104 | 10456 | void |
a1bcc528 | 10457 | do_type_instantiation (t, storage, complain) |
ca79f85d | 10458 | tree t, storage; |
c2ea3a40 | 10459 | tsubst_flags_t complain; |
7177d104 | 10460 | { |
e8abc66f MS |
10461 | int extern_p = 0; |
10462 | int nomem_p = 0; | |
5566b478 MS |
10463 | int static_p = 0; |
10464 | ||
ca79f85d JM |
10465 | if (TREE_CODE (t) == TYPE_DECL) |
10466 | t = TREE_TYPE (t); | |
10467 | ||
7ddedda4 | 10468 | if (! CLASS_TYPE_P (t) || ! CLASSTYPE_TEMPLATE_INFO (t)) |
ca79f85d | 10469 | { |
33bd39a2 | 10470 | error ("explicit instantiation of non-template type `%T'", t); |
ca79f85d JM |
10471 | return; |
10472 | } | |
10473 | ||
5566b478 | 10474 | complete_type (t); |
7177d104 | 10475 | |
a292b002 MS |
10476 | /* With -fexternal-templates, explicit instantiations are treated the same |
10477 | as implicit ones. */ | |
a0a33927 MS |
10478 | if (flag_external_templates) |
10479 | return; | |
10480 | ||
d0f062fb | 10481 | if (!COMPLETE_TYPE_P (t)) |
f0e01782 | 10482 | { |
c2ea3a40 | 10483 | if (complain & tf_error) |
33bd39a2 | 10484 | error ("explicit instantiation of `%#T' before definition of template", |
a1bcc528 | 10485 | t); |
f0e01782 MS |
10486 | return; |
10487 | } | |
10488 | ||
03d0f4af | 10489 | if (storage != NULL_TREE) |
f0e01782 | 10490 | { |
c02f5e29 | 10491 | if (pedantic && !in_system_header) |
33bd39a2 | 10492 | pedwarn("ISO C++ forbids the use of `%s' on explicit instantiations", |
8251199e | 10493 | IDENTIFIER_POINTER (storage)); |
03d0f4af MM |
10494 | |
10495 | if (storage == ridpointers[(int) RID_INLINE]) | |
10496 | nomem_p = 1; | |
10497 | else if (storage == ridpointers[(int) RID_EXTERN]) | |
10498 | extern_p = 1; | |
10499 | else if (storage == ridpointers[(int) RID_STATIC]) | |
10500 | static_p = 1; | |
10501 | else | |
10502 | { | |
33bd39a2 | 10503 | error ("storage class `%D' applied to template instantiation", |
03d0f4af MM |
10504 | storage); |
10505 | extern_p = 0; | |
10506 | } | |
f0e01782 MS |
10507 | } |
10508 | ||
370af2d5 | 10509 | if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)) |
03d0f4af | 10510 | { |
07782718 | 10511 | /* DR 259 [temp.spec]. |
a292b002 | 10512 | |
07782718 KL |
10513 | Both an explicit instantiation and a declaration of an explicit |
10514 | specialization shall not appear in a program unless the explicit | |
10515 | instantiation follows a declaration of the explicit specialization. | |
10516 | ||
10517 | For a given set of template parameters, if an explicit | |
10518 | instantiation of a template appears after a declaration of an | |
10519 | explicit specialization for that template, the explicit | |
10520 | instantiation has no effect. */ | |
03d0f4af MM |
10521 | return; |
10522 | } | |
10523 | else if (CLASSTYPE_EXPLICIT_INSTANTIATION (t)) | |
44a8d0b3 | 10524 | { |
03d0f4af MM |
10525 | /* [temp.spec] |
10526 | ||
10527 | No program shall explicitly instantiate any template more | |
10528 | than once. | |
10529 | ||
2aaf816d JM |
10530 | If CLASSTYPE_INTERFACE_ONLY, then the first explicit instantiation |
10531 | was `extern'. If EXTERN_P then the second is. If -frepo, chances | |
aba649ba | 10532 | are we already got marked as an explicit instantiation because of the |
2aaf816d | 10533 | repo file. All these cases are OK. */ |
a1bcc528 | 10534 | if (!CLASSTYPE_INTERFACE_ONLY (t) && !extern_p && !flag_use_repository |
c2ea3a40 | 10535 | && (complain & tf_error)) |
33bd39a2 | 10536 | pedwarn ("duplicate explicit instantiation of `%#T'", t); |
03d0f4af MM |
10537 | |
10538 | /* If we've already instantiated the template, just return now. */ | |
10539 | if (!CLASSTYPE_INTERFACE_ONLY (t)) | |
10540 | return; | |
44a8d0b3 | 10541 | } |
e8abc66f | 10542 | |
03d0f4af MM |
10543 | mark_class_instantiated (t, extern_p); |
10544 | repo_template_instantiated (t, extern_p); | |
10545 | ||
e8abc66f MS |
10546 | if (nomem_p) |
10547 | return; | |
10548 | ||
7177d104 | 10549 | { |
db5ae43f | 10550 | tree tmp; |
5566b478 | 10551 | |
03d0f4af MM |
10552 | /* In contrast to implicit instantiation, where only the |
10553 | declarations, and not the definitions, of members are | |
10554 | instantiated, we have here: | |
10555 | ||
10556 | [temp.explicit] | |
10557 | ||
10558 | The explicit instantiation of a class template specialization | |
10559 | implies the instantiation of all of its members not | |
10560 | previously explicitly specialized in the translation unit | |
10561 | containing the explicit instantiation. | |
10562 | ||
10563 | Of course, we can't instantiate member template classes, since | |
10564 | we don't have any arguments for them. Note that the standard | |
dc957d14 | 10565 | is unclear on whether the instantiation of the members are |
03d0f4af MM |
10566 | *explicit* instantiations or not. We choose to be generous, |
10567 | and not set DECL_EXPLICIT_INSTANTIATION. Therefore, we allow | |
10568 | the explicit instantiation of a class where some of the members | |
10569 | have no definition in the current translation unit. */ | |
10570 | ||
5566b478 MS |
10571 | if (! static_p) |
10572 | for (tmp = TYPE_METHODS (t); tmp; tmp = TREE_CHAIN (tmp)) | |
a7d87521 | 10573 | if (TREE_CODE (tmp) == FUNCTION_DECL |
1f109f0f | 10574 | && DECL_TEMPLATE_INSTANTIATION (tmp)) |
5566b478 MS |
10575 | { |
10576 | mark_decl_instantiated (tmp, extern_p); | |
10577 | repo_template_instantiated (tmp, extern_p); | |
10578 | if (! extern_p) | |
16d53b64 | 10579 | instantiate_decl (tmp, /*defer_ok=*/1); |
5566b478 MS |
10580 | } |
10581 | ||
10582 | for (tmp = TYPE_FIELDS (t); tmp; tmp = TREE_CHAIN (tmp)) | |
10583 | if (TREE_CODE (tmp) == VAR_DECL && DECL_TEMPLATE_INSTANTIATION (tmp)) | |
863adfc0 | 10584 | { |
5566b478 | 10585 | mark_decl_instantiated (tmp, extern_p); |
863adfc0 | 10586 | repo_template_instantiated (tmp, extern_p); |
5566b478 | 10587 | if (! extern_p) |
16d53b64 | 10588 | instantiate_decl (tmp, /*defer_ok=*/1); |
863adfc0 | 10589 | } |
7177d104 | 10590 | |
a292b002 | 10591 | for (tmp = CLASSTYPE_TAGS (t); tmp; tmp = TREE_CHAIN (tmp)) |
e4a84209 MM |
10592 | if (IS_AGGR_TYPE (TREE_VALUE (tmp)) |
10593 | && !uses_template_parms (CLASSTYPE_TI_ARGS (TREE_VALUE (tmp)))) | |
a1bcc528 | 10594 | do_type_instantiation (TYPE_MAIN_DECL (TREE_VALUE (tmp)), storage, 0); |
a292b002 | 10595 | } |
8d08fdba | 10596 | } |
a28e3c7f | 10597 | |
36a117a5 MM |
10598 | /* Given a function DECL, which is a specialization of TMPL, modify |
10599 | DECL to be a re-instantiation of TMPL with the same template | |
10600 | arguments. TMPL should be the template into which tsubst'ing | |
10601 | should occur for DECL, not the most general template. | |
830bfa74 MM |
10602 | |
10603 | One reason for doing this is a scenario like this: | |
10604 | ||
10605 | template <class T> | |
10606 | void f(const T&, int i); | |
10607 | ||
10608 | void g() { f(3, 7); } | |
10609 | ||
10610 | template <class T> | |
10611 | void f(const T& t, const int i) { } | |
10612 | ||
10613 | Note that when the template is first instantiated, with | |
10614 | instantiate_template, the resulting DECL will have no name for the | |
10615 | first parameter, and the wrong type for the second. So, when we go | |
10616 | to instantiate the DECL, we regenerate it. */ | |
10617 | ||
e9659ab0 | 10618 | static void |
830bfa74 MM |
10619 | regenerate_decl_from_template (decl, tmpl) |
10620 | tree decl; | |
10621 | tree tmpl; | |
10622 | { | |
f9a7ae04 MM |
10623 | /* The most general version of TMPL. */ |
10624 | tree gen_tmpl; | |
10625 | /* The arguments used to instantiate DECL, from the most general | |
10626 | template. */ | |
830bfa74 | 10627 | tree args; |
830bfa74 MM |
10628 | tree code_pattern; |
10629 | tree new_decl; | |
36a117a5 | 10630 | int unregistered; |
830bfa74 MM |
10631 | |
10632 | args = DECL_TI_ARGS (decl); | |
10633 | code_pattern = DECL_TEMPLATE_RESULT (tmpl); | |
10634 | ||
8251199e JM |
10635 | /* Unregister the specialization so that when we tsubst we will not |
10636 | just return DECL. We don't have to unregister DECL from TMPL | |
10637 | because if would only be registered there if it were a partial | |
10638 | instantiation of a specialization, which it isn't: it's a full | |
10639 | instantiation. */ | |
36a117a5 | 10640 | gen_tmpl = most_general_template (tmpl); |
2b59fc25 | 10641 | push_access_scope_real (gen_tmpl, args, DECL_CONTEXT (decl)); |
36a117a5 MM |
10642 | unregistered = unregister_specialization (decl, gen_tmpl); |
10643 | ||
10644 | /* If the DECL was not unregistered then something peculiar is | |
10645 | happening: we created a specialization but did not call | |
10646 | register_specialization for it. */ | |
10647 | my_friendly_assert (unregistered, 0); | |
10648 | ||
d8c4447d | 10649 | /* Do the substitution to get the new declaration. */ |
c2ea3a40 | 10650 | new_decl = tsubst (code_pattern, args, tf_error, NULL_TREE); |
830bfa74 MM |
10651 | |
10652 | if (TREE_CODE (decl) == VAR_DECL) | |
10653 | { | |
10654 | /* Set up DECL_INITIAL, since tsubst doesn't. */ | |
17bbb839 MM |
10655 | if (!DECL_INITIALIZED_IN_CLASS_P (decl)) |
10656 | DECL_INITIAL (new_decl) = | |
10657 | tsubst_expr (DECL_INITIAL (code_pattern), args, | |
10658 | tf_error, DECL_TI_TEMPLATE (decl)); | |
830bfa74 | 10659 | } |
2b0a63a3 | 10660 | else if (TREE_CODE (decl) == FUNCTION_DECL) |
fbf1c34b MM |
10661 | { |
10662 | /* Convince duplicate_decls to use the DECL_ARGUMENTS from the | |
10663 | new decl. */ | |
10664 | DECL_INITIAL (new_decl) = error_mark_node; | |
10665 | /* And don't complain about a duplicate definition. */ | |
10666 | DECL_INITIAL (decl) = NULL_TREE; | |
10667 | } | |
36a117a5 | 10668 | |
2b59fc25 | 10669 | pop_access_scope (decl); |
0e902d98 | 10670 | |
36a117a5 MM |
10671 | /* The immediate parent of the new template is still whatever it was |
10672 | before, even though tsubst sets DECL_TI_TEMPLATE up as the most | |
10673 | general template. We also reset the DECL_ASSEMBLER_NAME since | |
10674 | tsubst always calculates the name as if the function in question | |
10675 | were really a template instance, and sometimes, with friend | |
10676 | functions, this is not so. See tsubst_friend_function for | |
10677 | details. */ | |
10678 | DECL_TI_TEMPLATE (new_decl) = DECL_TI_TEMPLATE (decl); | |
92643fea | 10679 | COPY_DECL_ASSEMBLER_NAME (decl, new_decl); |
19e7881c | 10680 | COPY_DECL_RTL (decl, new_decl); |
459c43ad | 10681 | DECL_USE_TEMPLATE (new_decl) = DECL_USE_TEMPLATE (decl); |
36a117a5 MM |
10682 | |
10683 | /* Call duplicate decls to merge the old and new declarations. */ | |
830bfa74 MM |
10684 | duplicate_decls (new_decl, decl); |
10685 | ||
36a117a5 MM |
10686 | /* Now, re-register the specialization. */ |
10687 | register_specialization (decl, gen_tmpl, args); | |
830bfa74 MM |
10688 | } |
10689 | ||
a723baf1 MM |
10690 | /* Return the TEMPLATE_DECL into which DECL_TI_ARGS(DECL) should be |
10691 | substituted to get DECL. */ | |
10692 | ||
10693 | static tree | |
10694 | template_for_substitution (tree decl) | |
10695 | { | |
10696 | tree tmpl = DECL_TI_TEMPLATE (decl); | |
10697 | ||
10698 | /* Set TMPL to the template whose DECL_TEMPLATE_RESULT is the pattern | |
10699 | for the instantiation. This is not always the most general | |
10700 | template. Consider, for example: | |
10701 | ||
10702 | template <class T> | |
10703 | struct S { template <class U> void f(); | |
10704 | template <> void f<int>(); }; | |
10705 | ||
10706 | and an instantiation of S<double>::f<int>. We want TD to be the | |
10707 | specialization S<T>::f<int>, not the more general S<T>::f<U>. */ | |
10708 | while (/* An instantiation cannot have a definition, so we need a | |
10709 | more general template. */ | |
10710 | DECL_TEMPLATE_INSTANTIATION (tmpl) | |
10711 | /* We must also deal with friend templates. Given: | |
10712 | ||
10713 | template <class T> struct S { | |
10714 | template <class U> friend void f() {}; | |
10715 | }; | |
10716 | ||
10717 | S<int>::f<U> say, is not an instantiation of S<T>::f<U>, | |
10718 | so far as the language is concerned, but that's still | |
10719 | where we get the pattern for the instantiation from. On | |
10720 | other hand, if the definition comes outside the class, say: | |
10721 | ||
10722 | template <class T> struct S { | |
10723 | template <class U> friend void f(); | |
10724 | }; | |
10725 | template <class U> friend void f() {} | |
10726 | ||
10727 | we don't need to look any further. That's what the check for | |
10728 | DECL_INITIAL is for. */ | |
10729 | || (TREE_CODE (decl) == FUNCTION_DECL | |
10730 | && DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (tmpl) | |
10731 | && !DECL_INITIAL (DECL_TEMPLATE_RESULT (tmpl)))) | |
10732 | { | |
10733 | /* The present template, TD, should not be a definition. If it | |
10734 | were a definition, we should be using it! Note that we | |
10735 | cannot restructure the loop to just keep going until we find | |
10736 | a template with a definition, since that might go too far if | |
10737 | a specialization was declared, but not defined. */ | |
10738 | my_friendly_assert (!(TREE_CODE (decl) == VAR_DECL | |
10739 | && !DECL_IN_AGGR_P (DECL_TEMPLATE_RESULT (tmpl))), | |
10740 | 0); | |
10741 | ||
10742 | /* Fetch the more general template. */ | |
10743 | tmpl = DECL_TI_TEMPLATE (tmpl); | |
10744 | } | |
10745 | ||
10746 | return tmpl; | |
10747 | } | |
10748 | ||
16d53b64 | 10749 | /* Produce the definition of D, a _DECL generated from a template. If |
838dfd8a | 10750 | DEFER_OK is nonzero, then we don't have to actually do the |
16d53b64 | 10751 | instantiation now; we just have to do it sometime. */ |
f84b4be9 | 10752 | |
a28e3c7f | 10753 | tree |
16d53b64 | 10754 | instantiate_decl (d, defer_ok) |
5566b478 | 10755 | tree d; |
16d53b64 | 10756 | int defer_ok; |
a28e3c7f | 10757 | { |
36a117a5 | 10758 | tree tmpl = DECL_TI_TEMPLATE (d); |
65f8b0fb MM |
10759 | tree gen_args; |
10760 | tree args; | |
830bfa74 | 10761 | tree td; |
36a117a5 MM |
10762 | tree code_pattern; |
10763 | tree spec; | |
10764 | tree gen_tmpl; | |
5566b478 | 10765 | int pattern_defined; |
31a714f6 | 10766 | int need_push; |
82a98427 NS |
10767 | location_t saved_loc = input_location; |
10768 | ||
36a117a5 MM |
10769 | /* This function should only be used to instantiate templates for |
10770 | functions and static member variables. */ | |
10771 | my_friendly_assert (TREE_CODE (d) == FUNCTION_DECL | |
10772 | || TREE_CODE (d) == VAR_DECL, 0); | |
10773 | ||
cec24319 MM |
10774 | /* Variables are never deferred; if instantiation is required, they |
10775 | are instantiated right away. That allows for better code in the | |
10776 | case that an expression refers to the value of the variable -- | |
10777 | if the variable has a constant value the referring expression can | |
10778 | take advantage of that fact. */ | |
10779 | if (TREE_CODE (d) == VAR_DECL) | |
10780 | defer_ok = 0; | |
10781 | ||
db9b2174 MM |
10782 | /* Don't instantiate cloned functions. Instead, instantiate the |
10783 | functions they cloned. */ | |
10784 | if (TREE_CODE (d) == FUNCTION_DECL && DECL_CLONED_FUNCTION_P (d)) | |
10785 | d = DECL_CLONED_FUNCTION (d); | |
10786 | ||
fbf1c34b | 10787 | if (DECL_TEMPLATE_INSTANTIATED (d)) |
03d0f4af | 10788 | /* D has already been instantiated. It might seem reasonable to |
dc957d14 | 10789 | check whether or not D is an explicit instantiation, and, if so, |
03d0f4af MM |
10790 | stop here. But when an explicit instantiation is deferred |
10791 | until the end of the compilation, DECL_EXPLICIT_INSTANTIATION | |
10792 | is set, even though we still need to do the instantiation. */ | |
36a117a5 MM |
10793 | return d; |
10794 | ||
10795 | /* If we already have a specialization of this declaration, then | |
10796 | there's no reason to instantiate it. Note that | |
10797 | retrieve_specialization gives us both instantiations and | |
10798 | specializations, so we must explicitly check | |
10799 | DECL_TEMPLATE_SPECIALIZATION. */ | |
10800 | gen_tmpl = most_general_template (tmpl); | |
65f8b0fb MM |
10801 | gen_args = DECL_TI_ARGS (d); |
10802 | spec = retrieve_specialization (gen_tmpl, gen_args); | |
36a117a5 MM |
10803 | if (spec != NULL_TREE && DECL_TEMPLATE_SPECIALIZATION (spec)) |
10804 | return spec; | |
10805 | ||
10806 | /* This needs to happen before any tsubsting. */ | |
10807 | if (! push_tinst_level (d)) | |
10808 | return d; | |
10809 | ||
297a5329 JM |
10810 | timevar_push (TV_PARSE); |
10811 | ||
4d85e00e | 10812 | /* Set TD to the template whose DECL_TEMPLATE_RESULT is the pattern |
a723baf1 MM |
10813 | for the instantiation. */ |
10814 | td = template_for_substitution (d); | |
fee23f54 | 10815 | code_pattern = DECL_TEMPLATE_RESULT (td); |
27bb8339 | 10816 | |
649fc72d NS |
10817 | if (DECL_NAMESPACE_SCOPE_P (d) && !DECL_INITIALIZED_IN_CLASS_P (d)) |
10818 | /* In the case of a friend template whose definition is provided | |
10819 | outside the class, we may have too many arguments. Drop the | |
10820 | ones we don't need. */ | |
10821 | args = get_innermost_template_args | |
10822 | (gen_args, TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (td))); | |
10823 | else | |
10824 | args = gen_args; | |
65f8b0fb | 10825 | |
5566b478 | 10826 | if (TREE_CODE (d) == FUNCTION_DECL) |
39c76b4f | 10827 | pattern_defined = (DECL_SAVED_TREE (code_pattern) != NULL_TREE); |
5566b478 | 10828 | else |
36a117a5 | 10829 | pattern_defined = ! DECL_IN_AGGR_P (code_pattern); |
de22184b | 10830 | |
82a98427 | 10831 | input_location = DECL_SOURCE_LOCATION (d); |
de22184b | 10832 | |
de22184b | 10833 | if (pattern_defined) |
5566b478 | 10834 | { |
7e9abee9 MM |
10835 | /* Let the repository code that this template definition is |
10836 | available. | |
10837 | ||
10838 | The repository doesn't need to know about cloned functions | |
10839 | because they never actually show up in the object file. It | |
10840 | does need to know about the clones; those are the symbols | |
10841 | that the linker will be emitting error messages about. */ | |
10842 | if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (d) | |
10843 | || DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (d)) | |
10844 | { | |
10845 | tree t; | |
10846 | ||
10847 | for (t = TREE_CHAIN (d); | |
10848 | t && DECL_CLONED_FUNCTION_P (t); | |
10849 | t = TREE_CHAIN (t)) | |
10850 | repo_template_used (t); | |
10851 | } | |
10852 | else | |
10853 | repo_template_used (d); | |
5566b478 MS |
10854 | |
10855 | if (flag_external_templates && ! DECL_INTERFACE_KNOWN (d)) | |
10856 | { | |
10857 | if (flag_alt_external_templates) | |
10858 | { | |
10859 | if (interface_unknown) | |
10860 | warn_if_unknown_interface (d); | |
10861 | } | |
fee23f54 | 10862 | else if (DECL_INTERFACE_KNOWN (code_pattern)) |
5566b478 MS |
10863 | { |
10864 | DECL_INTERFACE_KNOWN (d) = 1; | |
fee23f54 | 10865 | DECL_NOT_REALLY_EXTERN (d) = ! DECL_EXTERNAL (code_pattern); |
5566b478 MS |
10866 | } |
10867 | else | |
fee23f54 | 10868 | warn_if_unknown_interface (code_pattern); |
5566b478 MS |
10869 | } |
10870 | ||
e92cc029 | 10871 | if (at_eof) |
5566b478 MS |
10872 | import_export_decl (d); |
10873 | } | |
10874 | ||
4f2b0fb2 NS |
10875 | if (!defer_ok) |
10876 | { | |
10877 | /* Recheck the substitutions to obtain any warning messages | |
10878 | about ignoring cv qualifiers. */ | |
10879 | tree gen = DECL_TEMPLATE_RESULT (gen_tmpl); | |
10880 | tree type = TREE_TYPE (gen); | |
10881 | ||
0e902d98 | 10882 | /* Make sure that we can see identifiers, and compute access |
2b59fc25 KL |
10883 | correctly. D is already the target FUNCTION_DECL with the |
10884 | right context. */ | |
10885 | push_access_scope (d); | |
0e902d98 | 10886 | |
4f2b0fb2 NS |
10887 | if (TREE_CODE (gen) == FUNCTION_DECL) |
10888 | { | |
65f8b0fb MM |
10889 | tsubst (DECL_ARGUMENTS (gen), gen_args, tf_error | tf_warning, d); |
10890 | tsubst (TYPE_RAISES_EXCEPTIONS (type), gen_args, | |
4f2b0fb2 NS |
10891 | tf_error | tf_warning, d); |
10892 | /* Don't simply tsubst the function type, as that will give | |
10893 | duplicate warnings about poor parameter qualifications. | |
10894 | The function arguments are the same as the decl_arguments | |
c6002625 | 10895 | without the top level cv qualifiers. */ |
4f2b0fb2 NS |
10896 | type = TREE_TYPE (type); |
10897 | } | |
65f8b0fb | 10898 | tsubst (type, gen_args, tf_error | tf_warning, d); |
0e902d98 | 10899 | |
2b59fc25 | 10900 | pop_access_scope (d); |
4f2b0fb2 NS |
10901 | } |
10902 | ||
46ccf50a JM |
10903 | if (TREE_CODE (d) == VAR_DECL && DECL_INITIALIZED_IN_CLASS_P (d) |
10904 | && DECL_INITIAL (d) == NULL_TREE) | |
10905 | /* We should have set up DECL_INITIAL in instantiate_class_template. */ | |
10906 | abort (); | |
930cd796 MM |
10907 | /* Reject all external templates except inline functions. */ |
10908 | else if (DECL_INTERFACE_KNOWN (d) | |
10909 | && ! DECL_NOT_REALLY_EXTERN (d) | |
4f8e1232 MM |
10910 | && ! (TREE_CODE (d) == FUNCTION_DECL |
10911 | && DECL_INLINE (d))) | |
930cd796 | 10912 | goto out; |
16d53b64 MM |
10913 | /* Defer all other templates, unless we have been explicitly |
10914 | forbidden from doing so. We restore the source position here | |
10915 | because it's used by add_pending_template. */ | |
10916 | else if (! pattern_defined || defer_ok) | |
10917 | { | |
82a98427 | 10918 | input_location = saved_loc; |
c27be9b9 | 10919 | |
03d0f4af MM |
10920 | if (at_eof && !pattern_defined |
10921 | && DECL_EXPLICIT_INSTANTIATION (d)) | |
10922 | /* [temp.explicit] | |
10923 | ||
10924 | The definition of a non-exported function template, a | |
10925 | non-exported member function template, or a non-exported | |
10926 | member function or static data member of a class template | |
10927 | shall be present in every translation unit in which it is | |
10928 | explicitly instantiated. */ | |
33bd39a2 | 10929 | pedwarn |
46ccf50a | 10930 | ("explicit instantiation of `%D' but no definition available", d); |
03d0f4af | 10931 | |
5566b478 | 10932 | add_pending_template (d); |
de22184b | 10933 | goto out; |
5566b478 MS |
10934 | } |
10935 | ||
31a714f6 MM |
10936 | need_push = !global_bindings_p (); |
10937 | if (need_push) | |
10938 | push_to_top_level (); | |
414ea4aa | 10939 | |
2b0a63a3 MM |
10940 | /* Regenerate the declaration in case the template has been modified |
10941 | by a subsequent redeclaration. */ | |
10942 | regenerate_decl_from_template (d, td); | |
1d62c33e | 10943 | |
120722ac | 10944 | /* We already set the file and line above. Reset them now in case |
82a98427 NS |
10945 | they changed as a result of calling |
10946 | regenerate_decl_from_template. */ | |
10947 | input_location = DECL_SOURCE_LOCATION (d); | |
5156628f | 10948 | |
5566b478 MS |
10949 | if (TREE_CODE (d) == VAR_DECL) |
10950 | { | |
1d62c33e MM |
10951 | /* Clear out DECL_RTL; whatever was there before may not be right |
10952 | since we've reset the type of the declaration. */ | |
10953 | SET_DECL_RTL (d, NULL_RTX); | |
10954 | ||
5566b478 | 10955 | DECL_IN_AGGR_P (d) = 0; |
b2dd096b MM |
10956 | import_export_decl (d); |
10957 | DECL_EXTERNAL (d) = ! DECL_NOT_REALLY_EXTERN (d); | |
ea56c40c MM |
10958 | |
10959 | if (DECL_EXTERNAL (d)) | |
10960 | { | |
10961 | /* The fact that this code is executing indicates that: | |
10962 | ||
10963 | (1) D is a template static data member, for which a | |
10964 | definition is available. | |
10965 | ||
10966 | (2) An implicit or explicit instantiation has occured. | |
10967 | ||
10968 | (3) We are not going to emit a definition of the static | |
10969 | data member at this time. | |
10970 | ||
10971 | This situation is peculiar, but it occurs on platforms | |
10972 | without weak symbols when performing an implicit | |
10973 | instantiation. There, we cannot implicitly instantiate a | |
10974 | defined static data member in more than one translation | |
10975 | unit, so import_export_decl marks the declaration as | |
10976 | external; we must rely on explicit instantiation. */ | |
10977 | } | |
10978 | else | |
10979 | { | |
10980 | /* Mark D as instantiated so that recursive calls to | |
10981 | instantiate_decl do not try to instantiate it again. */ | |
10982 | DECL_TEMPLATE_INSTANTIATED (d) = 1; | |
10983 | cp_finish_decl (d, | |
10984 | (!DECL_INITIALIZED_IN_CLASS_P (d) | |
10985 | ? DECL_INITIAL (d) : NULL_TREE), | |
10986 | NULL_TREE, 0); | |
10987 | } | |
5566b478 MS |
10988 | } |
10989 | else if (TREE_CODE (d) == FUNCTION_DECL) | |
10990 | { | |
6bbf1598 | 10991 | htab_t saved_local_specializations; |
a723baf1 MM |
10992 | tree subst_decl; |
10993 | tree tmpl_parm; | |
10994 | tree spec_parm; | |
6bbf1598 | 10995 | |
ea56c40c MM |
10996 | /* Mark D as instantiated so that recursive calls to |
10997 | instantiate_decl do not try to instantiate it again. */ | |
10998 | DECL_TEMPLATE_INSTANTIATED (d) = 1; | |
10999 | ||
6bbf1598 MM |
11000 | /* Save away the current list, in case we are instantiating one |
11001 | template from within the body of another. */ | |
11002 | saved_local_specializations = local_specializations; | |
11003 | ||
6dfbb909 | 11004 | /* Set up the list of local specializations. */ |
6dfbb909 | 11005 | local_specializations = htab_create (37, |
69f794a7 | 11006 | hash_local_specialization, |
a723baf1 | 11007 | eq_local_specializations, |
6dfbb909 MM |
11008 | NULL); |
11009 | ||
558475f0 | 11010 | /* Set up context. */ |
0b50d7f1 | 11011 | import_export_decl (d); |
a8f73d4b | 11012 | start_function (NULL_TREE, d, NULL_TREE, SF_PRE_PARSED); |
5566b478 | 11013 | |
a723baf1 MM |
11014 | /* Create substitution entries for the parameters. */ |
11015 | subst_decl = DECL_TEMPLATE_RESULT (template_for_substitution (d)); | |
11016 | tmpl_parm = DECL_ARGUMENTS (subst_decl); | |
11017 | spec_parm = DECL_ARGUMENTS (d); | |
11018 | if (DECL_NONSTATIC_MEMBER_FUNCTION_P (d)) | |
11019 | { | |
11020 | register_local_specialization (spec_parm, tmpl_parm); | |
11021 | spec_parm = skip_artificial_parms_for (d, spec_parm); | |
11022 | tmpl_parm = skip_artificial_parms_for (subst_decl, tmpl_parm); | |
11023 | } | |
11024 | while (tmpl_parm) | |
11025 | { | |
11026 | register_local_specialization (spec_parm, tmpl_parm); | |
11027 | tmpl_parm = TREE_CHAIN (tmpl_parm); | |
11028 | spec_parm = TREE_CHAIN (spec_parm); | |
11029 | } | |
11030 | my_friendly_assert (!spec_parm, 20020813); | |
11031 | ||
558475f0 MM |
11032 | /* Substitute into the body of the function. */ |
11033 | tsubst_expr (DECL_SAVED_TREE (code_pattern), args, | |
c2ea3a40 | 11034 | tf_error | tf_warning, tmpl); |
558475f0 | 11035 | |
6dfbb909 MM |
11036 | /* We don't need the local specializations any more. */ |
11037 | htab_delete (local_specializations); | |
6bbf1598 | 11038 | local_specializations = saved_local_specializations; |
6dfbb909 | 11039 | |
4d6abc1c | 11040 | /* Finish the function. */ |
b2dd096b | 11041 | d = finish_function (0); |
b2dd096b | 11042 | expand_body (d); |
5566b478 MS |
11043 | } |
11044 | ||
971cbc14 MM |
11045 | /* We're not deferring instantiation any more. */ |
11046 | TI_PENDING_TEMPLATE_FLAG (DECL_TEMPLATE_INFO (d)) = 0; | |
11047 | ||
31a714f6 MM |
11048 | if (need_push) |
11049 | pop_from_top_level (); | |
414ea4aa | 11050 | |
de22184b | 11051 | out: |
82a98427 | 11052 | input_location = saved_loc; |
5566b478 | 11053 | pop_tinst_level (); |
a28e3c7f | 11054 | |
297a5329 JM |
11055 | timevar_pop (TV_PARSE); |
11056 | ||
a28e3c7f MS |
11057 | return d; |
11058 | } | |
5566b478 | 11059 | |
0aafb128 MM |
11060 | /* Run through the list of templates that we wish we could |
11061 | instantiate, and instantiate any we can. */ | |
11062 | ||
11063 | int | |
11064 | instantiate_pending_templates () | |
11065 | { | |
11066 | tree *t; | |
46ccf50a | 11067 | tree last = NULL_TREE; |
0aafb128 MM |
11068 | int instantiated_something = 0; |
11069 | int reconsider; | |
11070 | ||
11071 | do | |
11072 | { | |
11073 | reconsider = 0; | |
11074 | ||
11075 | t = &pending_templates; | |
11076 | while (*t) | |
11077 | { | |
0aafb128 MM |
11078 | tree instantiation = TREE_VALUE (*t); |
11079 | ||
3ae18eaf | 11080 | reopen_tinst_level (TREE_PURPOSE (*t)); |
0aafb128 | 11081 | |
2f939d94 | 11082 | if (TYPE_P (instantiation)) |
0aafb128 MM |
11083 | { |
11084 | tree fn; | |
11085 | ||
d0f062fb | 11086 | if (!COMPLETE_TYPE_P (instantiation)) |
0aafb128 MM |
11087 | { |
11088 | instantiate_class_template (instantiation); | |
11089 | if (CLASSTYPE_TEMPLATE_INSTANTIATION (instantiation)) | |
11090 | for (fn = TYPE_METHODS (instantiation); | |
11091 | fn; | |
11092 | fn = TREE_CHAIN (fn)) | |
11093 | if (! DECL_ARTIFICIAL (fn)) | |
16d53b64 | 11094 | instantiate_decl (fn, /*defer_ok=*/0); |
d0f062fb | 11095 | if (COMPLETE_TYPE_P (instantiation)) |
0aafb128 MM |
11096 | { |
11097 | instantiated_something = 1; | |
11098 | reconsider = 1; | |
11099 | } | |
11100 | } | |
11101 | ||
d0f062fb | 11102 | if (COMPLETE_TYPE_P (instantiation)) |
0aafb128 MM |
11103 | /* If INSTANTIATION has been instantiated, then we don't |
11104 | need to consider it again in the future. */ | |
11105 | *t = TREE_CHAIN (*t); | |
46ccf50a JM |
11106 | else |
11107 | { | |
11108 | last = *t; | |
11109 | t = &TREE_CHAIN (*t); | |
11110 | } | |
0aafb128 MM |
11111 | } |
11112 | else | |
11113 | { | |
16d53b64 | 11114 | if (!DECL_TEMPLATE_SPECIALIZATION (instantiation) |
0aafb128 MM |
11115 | && !DECL_TEMPLATE_INSTANTIATED (instantiation)) |
11116 | { | |
16d53b64 MM |
11117 | instantiation = instantiate_decl (instantiation, |
11118 | /*defer_ok=*/0); | |
0aafb128 MM |
11119 | if (DECL_TEMPLATE_INSTANTIATED (instantiation)) |
11120 | { | |
11121 | instantiated_something = 1; | |
11122 | reconsider = 1; | |
11123 | } | |
11124 | } | |
11125 | ||
16d53b64 | 11126 | if (DECL_TEMPLATE_SPECIALIZATION (instantiation) |
0aafb128 MM |
11127 | || DECL_TEMPLATE_INSTANTIATED (instantiation)) |
11128 | /* If INSTANTIATION has been instantiated, then we don't | |
11129 | need to consider it again in the future. */ | |
11130 | *t = TREE_CHAIN (*t); | |
46ccf50a JM |
11131 | else |
11132 | { | |
11133 | last = *t; | |
11134 | t = &TREE_CHAIN (*t); | |
11135 | } | |
0aafb128 | 11136 | } |
84e5ca0f NS |
11137 | tinst_depth = 0; |
11138 | current_tinst_level = NULL_TREE; | |
0aafb128 | 11139 | } |
46ccf50a | 11140 | last_pending_template = last; |
0aafb128 MM |
11141 | } |
11142 | while (reconsider); | |
11143 | ||
11144 | return instantiated_something; | |
11145 | } | |
11146 | ||
fd74ca0b MM |
11147 | /* Substitute ARGVEC into T, which is a list of initializers for |
11148 | either base class or a non-static data member. The TREE_PURPOSEs | |
11149 | are DECLs, and the TREE_VALUEs are the initializer values. Used by | |
11150 | instantiate_decl. */ | |
4393e105 | 11151 | |
824b9a4c | 11152 | static tree |
fd74ca0b | 11153 | tsubst_initializer_list (t, argvec) |
5566b478 MS |
11154 | tree t, argvec; |
11155 | { | |
2282d28d | 11156 | tree inits = NULL_TREE; |
5566b478 MS |
11157 | |
11158 | for (; t; t = TREE_CHAIN (t)) | |
11159 | { | |
fd74ca0b MM |
11160 | tree decl; |
11161 | tree init; | |
11162 | tree val; | |
11163 | ||
c2ea3a40 | 11164 | decl = tsubst_copy (TREE_PURPOSE (t), argvec, tf_error | tf_warning, |
fd74ca0b | 11165 | NULL_TREE); |
1f5a253a NS |
11166 | decl = expand_member_init (decl); |
11167 | if (decl && !DECL_P (decl)) | |
11168 | in_base_initializer = 1; | |
11169 | ||
c2ea3a40 | 11170 | init = tsubst_expr (TREE_VALUE (t), argvec, tf_error | tf_warning, |
fd74ca0b | 11171 | NULL_TREE); |
fd74ca0b MM |
11172 | if (!init) |
11173 | ; | |
11174 | else if (TREE_CODE (init) == TREE_LIST) | |
11175 | for (val = init; val; val = TREE_CHAIN (val)) | |
11176 | TREE_VALUE (val) = convert_from_reference (TREE_VALUE (val)); | |
2282d28d | 11177 | else if (init != void_type_node) |
fd74ca0b MM |
11178 | init = convert_from_reference (init); |
11179 | ||
1f5a253a NS |
11180 | in_base_initializer = 0; |
11181 | ||
11182 | if (decl) | |
2282d28d | 11183 | { |
1f5a253a | 11184 | init = build_tree_list (decl, init); |
2282d28d MM |
11185 | TREE_CHAIN (init) = inits; |
11186 | inits = init; | |
11187 | } | |
5566b478 | 11188 | } |
2282d28d | 11189 | return inits; |
5566b478 MS |
11190 | } |
11191 | ||
61a127b3 MM |
11192 | /* Set CURRENT_ACCESS_SPECIFIER based on the protection of DECL. */ |
11193 | ||
11194 | static void | |
11195 | set_current_access_from_decl (decl) | |
11196 | tree decl; | |
11197 | { | |
11198 | if (TREE_PRIVATE (decl)) | |
11199 | current_access_specifier = access_private_node; | |
11200 | else if (TREE_PROTECTED (decl)) | |
11201 | current_access_specifier = access_protected_node; | |
11202 | else | |
11203 | current_access_specifier = access_public_node; | |
11204 | } | |
11205 | ||
dbfe2124 MM |
11206 | /* Instantiate an enumerated type. TAG is the template type, NEWTAG |
11207 | is the instantiation (which should have been created with | |
11208 | start_enum) and ARGS are the template arguments to use. */ | |
b87692e5 | 11209 | |
dbfe2124 MM |
11210 | static void |
11211 | tsubst_enum (tag, newtag, args) | |
11212 | tree tag; | |
11213 | tree newtag; | |
11214 | tree args; | |
b87692e5 | 11215 | { |
dbfe2124 | 11216 | tree e; |
b87692e5 MS |
11217 | |
11218 | for (e = TYPE_VALUES (tag); e; e = TREE_CHAIN (e)) | |
11219 | { | |
61a127b3 | 11220 | tree value; |
f5d70cc0 | 11221 | |
61a127b3 MM |
11222 | /* Note that in a template enum, the TREE_VALUE is the |
11223 | CONST_DECL, not the corresponding INTEGER_CST. */ | |
11224 | value = tsubst_expr (DECL_INITIAL (TREE_VALUE (e)), | |
c2ea3a40 | 11225 | args, tf_error | tf_warning, |
4393e105 | 11226 | NULL_TREE); |
61a127b3 MM |
11227 | |
11228 | /* Give this enumeration constant the correct access. */ | |
11229 | set_current_access_from_decl (TREE_VALUE (e)); | |
11230 | ||
11231 | /* Actually build the enumerator itself. */ | |
58595203 | 11232 | build_enumerator (TREE_PURPOSE (e), value, newtag); |
dbfe2124 | 11233 | } |
b3d5a58b | 11234 | |
219670f1 | 11235 | finish_enum (newtag); |
3e72ec9a GDR |
11236 | DECL_SOURCE_LOCATION (TYPE_NAME (newtag)) |
11237 | = DECL_SOURCE_LOCATION (TYPE_NAME (tag)); | |
b87692e5 | 11238 | } |
36a117a5 | 11239 | |
1f6e1acc AS |
11240 | /* DECL is a FUNCTION_DECL that is a template specialization. Return |
11241 | its type -- but without substituting the innermost set of template | |
11242 | arguments. So, innermost set of template parameters will appear in | |
5c74d5b0 | 11243 | the type. */ |
1f6e1acc AS |
11244 | |
11245 | tree | |
5c74d5b0 | 11246 | get_mostly_instantiated_function_type (decl) |
1f6e1acc | 11247 | tree decl; |
1f6e1acc | 11248 | { |
1f6e1acc AS |
11249 | tree fn_type; |
11250 | tree tmpl; | |
11251 | tree targs; | |
11252 | tree tparms; | |
11253 | int parm_depth; | |
11254 | ||
11255 | tmpl = most_general_template (DECL_TI_TEMPLATE (decl)); | |
11256 | targs = DECL_TI_ARGS (decl); | |
11257 | tparms = DECL_TEMPLATE_PARMS (tmpl); | |
11258 | parm_depth = TMPL_PARMS_DEPTH (tparms); | |
11259 | ||
11260 | /* There should be as many levels of arguments as there are levels | |
11261 | of parameters. */ | |
11262 | my_friendly_assert (parm_depth == TMPL_ARGS_DEPTH (targs), 0); | |
11263 | ||
11264 | fn_type = TREE_TYPE (tmpl); | |
1f6e1acc AS |
11265 | |
11266 | if (parm_depth == 1) | |
11267 | /* No substitution is necessary. */ | |
11268 | ; | |
11269 | else | |
11270 | { | |
11271 | int i; | |
11272 | tree partial_args; | |
11273 | ||
11274 | /* Replace the innermost level of the TARGS with NULL_TREEs to | |
dc957d14 | 11275 | let tsubst know not to substitute for those parameters. */ |
1f6e1acc AS |
11276 | partial_args = make_tree_vec (TREE_VEC_LENGTH (targs)); |
11277 | for (i = 1; i < TMPL_ARGS_DEPTH (targs); ++i) | |
11278 | SET_TMPL_ARGS_LEVEL (partial_args, i, | |
11279 | TMPL_ARGS_LEVEL (targs, i)); | |
11280 | SET_TMPL_ARGS_LEVEL (partial_args, | |
11281 | TMPL_ARGS_DEPTH (targs), | |
11282 | make_tree_vec (DECL_NTPARMS (tmpl))); | |
11283 | ||
5c74d5b0 KL |
11284 | /* Make sure that we can see identifiers, and compute access |
11285 | correctly. We can just use the context of DECL for the | |
11286 | partial substitution here. It depends only on outer template | |
11287 | parameters, regardless of whether the innermost level is | |
11288 | specialized or not. */ | |
2b59fc25 | 11289 | push_access_scope (decl); |
5c74d5b0 | 11290 | |
1f6e1acc AS |
11291 | /* Now, do the (partial) substitution to figure out the |
11292 | appropriate function type. */ | |
c2ea3a40 | 11293 | fn_type = tsubst (fn_type, partial_args, tf_error, NULL_TREE); |
1f6e1acc AS |
11294 | |
11295 | /* Substitute into the template parameters to obtain the real | |
11296 | innermost set of parameters. This step is important if the | |
11297 | innermost set of template parameters contains value | |
11298 | parameters whose types depend on outer template parameters. */ | |
11299 | TREE_VEC_LENGTH (partial_args)--; | |
c2ea3a40 | 11300 | tparms = tsubst_template_parms (tparms, partial_args, tf_error); |
1f6e1acc | 11301 | |
2b59fc25 | 11302 | pop_access_scope (decl); |
5c74d5b0 | 11303 | } |
1f6e1acc AS |
11304 | |
11305 | return fn_type; | |
11306 | } | |
669ec2b4 | 11307 | |
cb753e49 | 11308 | /* Return truthvalue if we're processing a template different from |
dc957d14 | 11309 | the last one involved in diagnostics. */ |
cb753e49 GDR |
11310 | int |
11311 | problematic_instantiation_changed () | |
11312 | { | |
11313 | return last_template_error_tick != tinst_level_tick; | |
11314 | } | |
11315 | ||
11316 | /* Remember current template involved in diagnostics. */ | |
11317 | void | |
11318 | record_last_problematic_instantiation () | |
11319 | { | |
11320 | last_template_error_tick = tinst_level_tick; | |
11321 | } | |
11322 | ||
11323 | tree | |
11324 | current_instantiation () | |
11325 | { | |
11326 | return current_tinst_level; | |
11327 | } | |
db3f4e4e NS |
11328 | |
11329 | /* [temp.param] Check that template non-type parm TYPE is of an allowable | |
838dfd8a | 11330 | type. Return zero for ok, nonzero for disallowed. Issue error and |
c2ea3a40 | 11331 | warning messages under control of COMPLAIN. */ |
db3f4e4e NS |
11332 | |
11333 | static int | |
11b810f1 | 11334 | invalid_nontype_parm_type_p (type, complain) |
db3f4e4e | 11335 | tree type; |
c2ea3a40 | 11336 | tsubst_flags_t complain; |
db3f4e4e NS |
11337 | { |
11338 | if (INTEGRAL_TYPE_P (type)) | |
11339 | return 0; | |
11340 | else if (POINTER_TYPE_P (type)) | |
11341 | return 0; | |
11342 | else if (TYPE_PTRMEM_P (type)) | |
11343 | return 0; | |
11344 | else if (TYPE_PTRMEMFUNC_P (type)) | |
11345 | return 0; | |
db3f4e4e NS |
11346 | else if (TREE_CODE (type) == TEMPLATE_TYPE_PARM) |
11347 | return 0; | |
11348 | else if (TREE_CODE (type) == TYPENAME_TYPE) | |
11349 | return 0; | |
11350 | ||
c2ea3a40 | 11351 | if (complain & tf_error) |
33bd39a2 | 11352 | error ("`%#T' is not a valid type for a template constant parameter", |
db3f4e4e NS |
11353 | type); |
11354 | return 1; | |
11355 | } | |
e2500fed | 11356 | |
5552b43c MM |
11357 | /* Returns TRUE if TYPE is dependent, in the sense of [temp.dep.type]. |
11358 | Assumes that TYPE really is a type, and not the ERROR_MARK_NODE.*/ | |
1fb3244a | 11359 | |
5552b43c MM |
11360 | static bool |
11361 | dependent_type_p_r (tree type) | |
1fb3244a MM |
11362 | { |
11363 | tree scope; | |
11364 | ||
1fb3244a MM |
11365 | /* [temp.dep.type] |
11366 | ||
11367 | A type is dependent if it is: | |
11368 | ||
11369 | -- a template parameter. */ | |
11370 | if (TREE_CODE (type) == TEMPLATE_TYPE_PARM) | |
11371 | return true; | |
11372 | /* -- a qualified-id with a nested-name-specifier which contains a | |
11373 | class-name that names a dependent type or whose unqualified-id | |
11374 | names a dependent type. */ | |
11375 | if (TREE_CODE (type) == TYPENAME_TYPE) | |
11376 | return true; | |
11377 | /* -- a cv-qualified type where the cv-unqualified type is | |
11378 | dependent. */ | |
11379 | type = TYPE_MAIN_VARIANT (type); | |
11380 | /* -- a compound type constructed from any dependent type. */ | |
11381 | if (TYPE_PTRMEM_P (type) || TYPE_PTRMEMFUNC_P (type)) | |
11382 | return (dependent_type_p (TYPE_PTRMEM_CLASS_TYPE (type)) | |
11383 | || dependent_type_p (TYPE_PTRMEM_POINTED_TO_TYPE | |
11384 | (type))); | |
11385 | else if (TREE_CODE (type) == POINTER_TYPE | |
11386 | || TREE_CODE (type) == REFERENCE_TYPE) | |
11387 | return dependent_type_p (TREE_TYPE (type)); | |
11388 | else if (TREE_CODE (type) == FUNCTION_TYPE | |
11389 | || TREE_CODE (type) == METHOD_TYPE) | |
11390 | { | |
11391 | tree arg_type; | |
11392 | ||
11393 | if (dependent_type_p (TREE_TYPE (type))) | |
11394 | return true; | |
11395 | for (arg_type = TYPE_ARG_TYPES (type); | |
11396 | arg_type; | |
11397 | arg_type = TREE_CHAIN (arg_type)) | |
11398 | if (dependent_type_p (TREE_VALUE (arg_type))) | |
11399 | return true; | |
11400 | return false; | |
11401 | } | |
11402 | /* -- an array type constructed from any dependent type or whose | |
11403 | size is specified by a constant expression that is | |
11404 | value-dependent. */ | |
11405 | if (TREE_CODE (type) == ARRAY_TYPE) | |
11406 | { | |
11407 | if (TYPE_DOMAIN (type) | |
11408 | && ((value_dependent_expression_p | |
11409 | (TYPE_MAX_VALUE (TYPE_DOMAIN (type)))) | |
11410 | || (type_dependent_expression_p | |
11411 | (TYPE_MAX_VALUE (TYPE_DOMAIN (type)))))) | |
11412 | return true; | |
11413 | return dependent_type_p (TREE_TYPE (type)); | |
11414 | } | |
11415 | /* -- a template-id in which either the template name is a template | |
11416 | parameter or any of the template arguments is a dependent type or | |
11417 | an expression that is type-dependent or value-dependent. | |
11418 | ||
11419 | This language seems somewhat confused; for example, it does not | |
11420 | discuss template template arguments. Therefore, we use the | |
11421 | definition for dependent template arguments in [temp.dep.temp]. */ | |
11422 | if (CLASS_TYPE_P (type) && CLASSTYPE_TEMPLATE_INFO (type) | |
11423 | && (dependent_template_id_p | |
11424 | (CLASSTYPE_TI_TEMPLATE (type), | |
11425 | CLASSTYPE_TI_ARGS (type)))) | |
11426 | return true; | |
11427 | else if (TREE_CODE (type) == BOUND_TEMPLATE_TEMPLATE_PARM) | |
11428 | return true; | |
11429 | /* All TYPEOF_TYPEs are dependent; if the argument of the `typeof' | |
11430 | expression is not type-dependent, then it should already been | |
11431 | have resolved. */ | |
11432 | if (TREE_CODE (type) == TYPEOF_TYPE) | |
11433 | return true; | |
11434 | /* The standard does not specifically mention types that are local | |
11435 | to template functions or local classes, but they should be | |
11436 | considered dependent too. For example: | |
11437 | ||
11438 | template <int I> void f() { | |
11439 | enum E { a = I }; | |
11440 | S<sizeof (E)> s; | |
11441 | } | |
11442 | ||
11443 | The size of `E' cannot be known until the value of `I' has been | |
11444 | determined. Therefore, `E' must be considered dependent. */ | |
11445 | scope = TYPE_CONTEXT (type); | |
11446 | if (scope && TYPE_P (scope)) | |
11447 | return dependent_type_p (scope); | |
11448 | else if (scope && TREE_CODE (scope) == FUNCTION_DECL) | |
11449 | return type_dependent_expression_p (scope); | |
11450 | ||
11451 | /* Other types are non-dependent. */ | |
11452 | return false; | |
11453 | } | |
11454 | ||
5552b43c MM |
11455 | /* Returns TRUE if TYPE is dependent, in the sense of |
11456 | [temp.dep.type]. */ | |
11457 | ||
11458 | bool | |
11459 | dependent_type_p (tree type) | |
11460 | { | |
11461 | /* If there are no template parameters in scope, then there can't be | |
11462 | any dependent types. */ | |
11463 | if (!processing_template_decl) | |
11464 | return false; | |
11465 | ||
11466 | /* If the type is NULL, we have not computed a type for the entity | |
11467 | in question; in that case, the type is dependent. */ | |
11468 | if (!type) | |
11469 | return true; | |
11470 | ||
11471 | /* Erroneous types can be considered non-dependent. */ | |
11472 | if (type == error_mark_node) | |
11473 | return false; | |
11474 | ||
11475 | /* If we have not already computed the appropriate value for TYPE, | |
11476 | do so now. */ | |
11477 | if (!TYPE_DEPENDENT_P_VALID (type)) | |
11478 | { | |
11479 | TYPE_DEPENDENT_P (type) = dependent_type_p_r (type); | |
11480 | TYPE_DEPENDENT_P_VALID (type) = 1; | |
11481 | } | |
11482 | ||
11483 | return TYPE_DEPENDENT_P (type); | |
11484 | } | |
11485 | ||
1fb3244a MM |
11486 | /* Returns TRUE if the EXPRESSION is value-dependent. */ |
11487 | ||
14d22dd6 | 11488 | bool |
1fb3244a MM |
11489 | value_dependent_expression_p (tree expression) |
11490 | { | |
11491 | if (!processing_template_decl) | |
11492 | return false; | |
11493 | ||
11494 | /* A name declared with a dependent type. */ | |
14d22dd6 MM |
11495 | if (TREE_CODE (expression) == LOOKUP_EXPR |
11496 | || (DECL_P (expression) | |
11497 | && dependent_type_p (TREE_TYPE (expression)))) | |
1fb3244a MM |
11498 | return true; |
11499 | /* A non-type template parameter. */ | |
11500 | if ((TREE_CODE (expression) == CONST_DECL | |
11501 | && DECL_TEMPLATE_PARM_P (expression)) | |
11502 | || TREE_CODE (expression) == TEMPLATE_PARM_INDEX) | |
11503 | return true; | |
11504 | /* A constant with integral or enumeration type and is initialized | |
11505 | with an expression that is value-dependent. */ | |
11506 | if (TREE_CODE (expression) == VAR_DECL | |
11507 | && DECL_INITIAL (expression) | |
11508 | && (CP_INTEGRAL_TYPE_P (TREE_TYPE (expression)) | |
11509 | || TREE_CODE (TREE_TYPE (expression)) == ENUMERAL_TYPE) | |
11510 | && value_dependent_expression_p (DECL_INITIAL (expression))) | |
11511 | return true; | |
11512 | /* These expressions are value-dependent if the type to which the | |
11513 | cast occurs is dependent. */ | |
11514 | if ((TREE_CODE (expression) == DYNAMIC_CAST_EXPR | |
11515 | || TREE_CODE (expression) == STATIC_CAST_EXPR | |
11516 | || TREE_CODE (expression) == CONST_CAST_EXPR | |
11517 | || TREE_CODE (expression) == REINTERPRET_CAST_EXPR | |
11518 | || TREE_CODE (expression) == CAST_EXPR) | |
11519 | && dependent_type_p (TREE_TYPE (expression))) | |
11520 | return true; | |
11521 | /* A `sizeof' expression where the sizeof operand is a type is | |
11522 | value-dependent if the type is dependent. If the type was not | |
11523 | dependent, we would no longer have a SIZEOF_EXPR, so any | |
11524 | SIZEOF_EXPR is dependent. */ | |
11525 | if (TREE_CODE (expression) == SIZEOF_EXPR) | |
11526 | return true; | |
11527 | /* A constant expression is value-dependent if any subexpression is | |
11528 | value-dependent. */ | |
11529 | if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (TREE_CODE (expression)))) | |
11530 | { | |
11531 | switch (TREE_CODE_CLASS (TREE_CODE (expression))) | |
11532 | { | |
11533 | case '1': | |
11534 | return (value_dependent_expression_p | |
11535 | (TREE_OPERAND (expression, 0))); | |
11536 | case '<': | |
11537 | case '2': | |
11538 | return ((value_dependent_expression_p | |
11539 | (TREE_OPERAND (expression, 0))) | |
11540 | || (value_dependent_expression_p | |
11541 | (TREE_OPERAND (expression, 1)))); | |
11542 | case 'e': | |
11543 | { | |
11544 | int i; | |
14d22dd6 MM |
11545 | for (i = 0; i < first_rtl_op (TREE_CODE (expression)); ++i) |
11546 | /* In some cases, some of the operands may be missing. | |
11547 | (For example, in the case of PREDECREMENT_EXPR, the | |
11548 | amount to increment by may be missing.) That doesn't | |
11549 | make the expression dependent. */ | |
11550 | if (TREE_OPERAND (expression, i) | |
11551 | && (value_dependent_expression_p | |
11552 | (TREE_OPERAND (expression, i)))) | |
1fb3244a MM |
11553 | return true; |
11554 | return false; | |
11555 | } | |
11556 | } | |
11557 | } | |
11558 | ||
11559 | /* The expression is not value-dependent. */ | |
11560 | return false; | |
11561 | } | |
11562 | ||
11563 | /* Returns TRUE if the EXPRESSION is type-dependent, in the sense of | |
11564 | [temp.dep.expr]. */ | |
11565 | ||
11566 | bool | |
11567 | type_dependent_expression_p (expression) | |
11568 | tree expression; | |
11569 | { | |
11570 | if (!processing_template_decl) | |
11571 | return false; | |
11572 | ||
11573 | /* Some expression forms are never type-dependent. */ | |
11574 | if (TREE_CODE (expression) == PSEUDO_DTOR_EXPR | |
11575 | || TREE_CODE (expression) == SIZEOF_EXPR | |
11576 | || TREE_CODE (expression) == ALIGNOF_EXPR | |
11577 | || TREE_CODE (expression) == TYPEID_EXPR | |
11578 | || TREE_CODE (expression) == DELETE_EXPR | |
11579 | || TREE_CODE (expression) == VEC_DELETE_EXPR | |
11580 | || TREE_CODE (expression) == THROW_EXPR) | |
11581 | return false; | |
11582 | ||
11583 | /* The types of these expressions depends only on the type to which | |
11584 | the cast occurs. */ | |
11585 | if (TREE_CODE (expression) == DYNAMIC_CAST_EXPR | |
11586 | || TREE_CODE (expression) == STATIC_CAST_EXPR | |
11587 | || TREE_CODE (expression) == CONST_CAST_EXPR | |
11588 | || TREE_CODE (expression) == REINTERPRET_CAST_EXPR | |
11589 | || TREE_CODE (expression) == CAST_EXPR) | |
11590 | return dependent_type_p (TREE_TYPE (expression)); | |
11591 | /* The types of these expressions depends only on the type created | |
11592 | by the expression. */ | |
11593 | else if (TREE_CODE (expression) == NEW_EXPR | |
11594 | || TREE_CODE (expression) == VEC_NEW_EXPR) | |
09d2f85f KL |
11595 | { |
11596 | /* For NEW_EXPR tree nodes created inside a template, either | |
11597 | the object type itself or a TREE_LIST may appear as the | |
11598 | operand 1. */ | |
11599 | tree type = TREE_OPERAND (expression, 1); | |
11600 | if (TREE_CODE (type) == TREE_LIST) | |
11601 | /* This is an array type. We need to check array dimensions | |
11602 | as well. */ | |
11603 | return dependent_type_p (TREE_VALUE (TREE_PURPOSE (type))) | |
11604 | || value_dependent_expression_p | |
11605 | (TREE_OPERAND (TREE_VALUE (type), 1)); | |
11606 | else | |
11607 | return dependent_type_p (type); | |
11608 | } | |
1fb3244a MM |
11609 | |
11610 | if (TREE_CODE (expression) == FUNCTION_DECL | |
11611 | && DECL_LANG_SPECIFIC (expression) | |
11612 | && DECL_TEMPLATE_INFO (expression) | |
11613 | && (dependent_template_id_p | |
11614 | (DECL_TI_TEMPLATE (expression), | |
11615 | INNERMOST_TEMPLATE_ARGS (DECL_TI_ARGS (expression))))) | |
11616 | return true; | |
11617 | ||
11618 | return (dependent_type_p (TREE_TYPE (expression))); | |
11619 | } | |
11620 | ||
11621 | /* Returns TRUE if the ARG (a template argument) is dependent. */ | |
11622 | ||
11623 | bool | |
11624 | dependent_template_arg_p (tree arg) | |
11625 | { | |
11626 | if (!processing_template_decl) | |
11627 | return false; | |
11628 | ||
11629 | if (TREE_CODE (arg) == TEMPLATE_DECL | |
11630 | || TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM) | |
11631 | return dependent_template_p (arg); | |
11632 | else if (TYPE_P (arg)) | |
11633 | return dependent_type_p (arg); | |
11634 | else | |
11635 | return (type_dependent_expression_p (arg) | |
11636 | || value_dependent_expression_p (arg)); | |
11637 | } | |
11638 | ||
11639 | /* Returns TRUE if the specialization TMPL<ARGS> is dependent. */ | |
11640 | ||
11641 | static bool | |
11642 | dependent_template_id_p (tree tmpl, tree args) | |
11643 | { | |
11644 | int i; | |
11645 | ||
11646 | if (dependent_template_p (tmpl)) | |
11647 | return true; | |
11648 | for (i = 0; i < TREE_VEC_LENGTH (args); ++i) | |
11649 | if (dependent_template_arg_p (TREE_VEC_ELT (args, i))) | |
11650 | return true; | |
11651 | return false; | |
11652 | } | |
11653 | ||
11654 | /* Returns TRUE if the template TMPL is dependent. */ | |
11655 | ||
11656 | bool | |
11657 | dependent_template_p (tree tmpl) | |
11658 | { | |
11659 | /* Template template parameters are dependent. */ | |
11660 | if (DECL_TEMPLATE_TEMPLATE_PARM_P (tmpl) | |
11661 | || TREE_CODE (tmpl) == TEMPLATE_TEMPLATE_PARM) | |
11662 | return true; | |
11663 | /* So are member templates of dependent classes. */ | |
11664 | if (TYPE_P (CP_DECL_CONTEXT (tmpl))) | |
11665 | return dependent_type_p (DECL_CONTEXT (tmpl)); | |
11666 | return false; | |
11667 | } | |
11668 | ||
14d22dd6 MM |
11669 | /* TYPE is a TYPENAME_TYPE. Returns the ordinary TYPE to which the |
11670 | TYPENAME_TYPE corresponds. Returns ERROR_MARK_NODE if no such TYPE | |
11671 | can be found. Note that this function peers inside uninstantiated | |
11672 | templates and therefore should be used only in extremely limited | |
11673 | situations. */ | |
11674 | ||
11675 | tree | |
11676 | resolve_typename_type (tree type, bool only_current_p) | |
11677 | { | |
11678 | tree scope; | |
11679 | tree name; | |
11680 | tree decl; | |
11681 | int quals; | |
11682 | ||
11683 | my_friendly_assert (TREE_CODE (type) == TYPENAME_TYPE, | |
11684 | 20010702); | |
11685 | ||
11686 | scope = TYPE_CONTEXT (type); | |
11687 | name = TYPE_IDENTIFIER (type); | |
11688 | ||
11689 | /* If the SCOPE is itself a TYPENAME_TYPE, then we need to resolve | |
11690 | it first before we can figure out what NAME refers to. */ | |
11691 | if (TREE_CODE (scope) == TYPENAME_TYPE) | |
11692 | scope = resolve_typename_type (scope, only_current_p); | |
11693 | /* If we don't know what SCOPE refers to, then we cannot resolve the | |
11694 | TYPENAME_TYPE. */ | |
11695 | if (scope == error_mark_node || TREE_CODE (scope) == TYPENAME_TYPE) | |
11696 | return error_mark_node; | |
11697 | /* If the SCOPE is a template type parameter, we have no way of | |
11698 | resolving the name. */ | |
11699 | if (TREE_CODE (scope) == TEMPLATE_TYPE_PARM) | |
11700 | return type; | |
11701 | /* If the SCOPE is not the current instantiation, there's no reason | |
11702 | to look inside it. */ | |
11703 | if (only_current_p && !currently_open_class (scope)) | |
11704 | return error_mark_node; | |
ca099ac8 MM |
11705 | /* If SCOPE is a partial instantiation, it will not have a valid |
11706 | TYPE_FIELDS list, so use the original template. */ | |
353b4fc0 | 11707 | scope = CLASSTYPE_PRIMARY_TEMPLATE_TYPE (scope); |
14d22dd6 MM |
11708 | /* Enter the SCOPE so that name lookup will be resolved as if we |
11709 | were in the class definition. In particular, SCOPE will no | |
11710 | longer be considered a dependent type. */ | |
11711 | push_scope (scope); | |
11712 | /* Look up the declaration. */ | |
86ac0575 | 11713 | decl = lookup_member (scope, name, /*protect=*/0, /*want_type=*/true); |
14d22dd6 MM |
11714 | /* Obtain the set of qualifiers applied to the TYPE. */ |
11715 | quals = cp_type_quals (type); | |
11716 | /* For a TYPENAME_TYPE like "typename X::template Y<T>", we want to | |
11717 | find a TEMPLATE_DECL. Otherwise, we want to find a TYPE_DECL. */ | |
11718 | if (!decl) | |
11719 | type = error_mark_node; | |
11720 | else if (TREE_CODE (TYPENAME_TYPE_FULLNAME (type)) == IDENTIFIER_NODE | |
11721 | && TREE_CODE (decl) == TYPE_DECL) | |
11722 | type = TREE_TYPE (decl); | |
11723 | else if (TREE_CODE (TYPENAME_TYPE_FULLNAME (type)) == TEMPLATE_ID_EXPR | |
11724 | && DECL_CLASS_TEMPLATE_P (decl)) | |
11725 | { | |
11726 | tree tmpl; | |
11727 | tree args; | |
11728 | /* Obtain the template and the arguments. */ | |
11729 | tmpl = TREE_OPERAND (TYPENAME_TYPE_FULLNAME (type), 0); | |
11730 | args = TREE_OPERAND (TYPENAME_TYPE_FULLNAME (type), 1); | |
11731 | /* Instantiate the template. */ | |
11732 | type = lookup_template_class (tmpl, args, NULL_TREE, NULL_TREE, | |
11733 | /*entering_scope=*/0, | |
11734 | tf_error); | |
11735 | } | |
11736 | else | |
11737 | type = error_mark_node; | |
11738 | /* Qualify the resulting type. */ | |
11739 | if (type != error_mark_node && quals) | |
11740 | type = cp_build_qualified_type (type, quals); | |
11741 | /* Leave the SCOPE. */ | |
11742 | pop_scope (scope); | |
11743 | ||
11744 | return type; | |
11745 | } | |
11746 | ||
11747 | tree | |
11748 | resolve_typename_type_in_current_instantiation (tree type) | |
11749 | { | |
11750 | tree t; | |
11751 | ||
11752 | t = resolve_typename_type (type, /*only_current_p=*/true); | |
11753 | return (t != error_mark_node) ? t : type; | |
11754 | } | |
11755 | ||
e2500fed | 11756 | #include "gt-cp-pt.h" |