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8d08fdba | 1 | /* Handle parameterized types (templates) for GNU C++. |
4c571114 | 2 | Copyright (C) 1992, 93-97, 1998, 1999 Free Software Foundation, Inc. |
8d08fdba | 3 | Written by Ken Raeburn (raeburn@cygnus.com) while at Watchmaker Computing. |
fc378698 | 4 | Rewritten by Jason Merrill (jason@cygnus.com). |
8d08fdba MS |
5 | |
6 | This file is part of GNU CC. | |
7 | ||
8 | GNU CC is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
12 | ||
13 | GNU CC is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GNU CC; see the file COPYING. If not, write to | |
e9fa0c7c RK |
20 | the Free Software Foundation, 59 Temple Place - Suite 330, |
21 | Boston, MA 02111-1307, USA. */ | |
8d08fdba MS |
22 | |
23 | /* Known bugs or deficiencies include: | |
e92cc029 | 24 | |
e92cc029 MS |
25 | all methods must be provided in header files; can't use a source |
26 | file that contains only the method templates and "just win". */ | |
8d08fdba MS |
27 | |
28 | #include "config.h" | |
8d052bc7 | 29 | #include "system.h" |
8d08fdba MS |
30 | #include "obstack.h" |
31 | ||
32 | #include "tree.h" | |
33 | #include "flags.h" | |
34 | #include "cp-tree.h" | |
35 | #include "decl.h" | |
36 | #include "parse.h" | |
f0e01782 | 37 | #include "lex.h" |
e8abc66f | 38 | #include "output.h" |
a9aedbc2 | 39 | #include "defaults.h" |
49c249e1 | 40 | #include "except.h" |
54f92bfb | 41 | #include "toplev.h" |
3dcaad8b MM |
42 | #include "rtl.h" |
43 | #include "varray.h" | |
49c249e1 | 44 | |
050367a3 MM |
45 | /* The type of functions taking a tree, and some additional data, and |
46 | returning an int. */ | |
47 | typedef int (*tree_fn_t) PROTO((tree, void*)); | |
48 | ||
8d08fdba | 49 | extern struct obstack permanent_obstack; |
8d08fdba MS |
50 | |
51 | extern int lineno; | |
52 | extern char *input_filename; | |
8d08fdba | 53 | |
5566b478 MS |
54 | tree current_template_parms; |
55 | HOST_WIDE_INT processing_template_decl; | |
8d08fdba | 56 | |
0aafb128 MM |
57 | /* The PENDING_TEMPLATES is a TREE_LIST of templates whose |
58 | instantiations have been deferred, either because their definitions | |
59 | were not yet available, or because we were putting off doing the | |
60 | work. The TREE_PURPOSE of each entry is a SRCLOC indicating where | |
61 | the instantiate request occurred; the TREE_VALUE is a either a DECL | |
62 | (for a function or static data member), or a TYPE (for a class) | |
63 | indicating what we are hoping to instantiate. */ | |
64 | static tree pending_templates; | |
5566b478 MS |
65 | static tree *template_tail = &pending_templates; |
66 | ||
0aafb128 | 67 | static tree maybe_templates; |
73aad9b9 JM |
68 | static tree *maybe_template_tail = &maybe_templates; |
69 | ||
5566b478 | 70 | int minimal_parse_mode; |
75b0bbce | 71 | |
92eca640 | 72 | int processing_specialization; |
75650646 | 73 | int processing_explicit_instantiation; |
67ffc812 | 74 | int processing_template_parmlist; |
386b8a85 JM |
75 | static int template_header_count; |
76 | ||
75650646 | 77 | static tree saved_trees; |
3dcaad8b MM |
78 | static varray_type inline_parm_levels; |
79 | static size_t inline_parm_levels_used; | |
75650646 | 80 | |
8d08fdba MS |
81 | #define obstack_chunk_alloc xmalloc |
82 | #define obstack_chunk_free free | |
83 | ||
830bfa74 MM |
84 | #define UNIFY_ALLOW_NONE 0 |
85 | #define UNIFY_ALLOW_MORE_CV_QUAL 1 | |
86 | #define UNIFY_ALLOW_LESS_CV_QUAL 2 | |
87 | #define UNIFY_ALLOW_DERIVED 4 | |
161c12b0 | 88 | #define UNIFY_ALLOW_INTEGER 8 |
830bfa74 | 89 | |
4393e105 MM |
90 | #define GTB_VIA_VIRTUAL 1 /* The base class we are examining is |
91 | virtual, or a base class of a virtual | |
92 | base. */ | |
93 | #define GTB_IGNORE_TYPE 2 /* We don't need to try to unify the current | |
94 | type with the desired type. */ | |
95 | ||
34016c81 | 96 | static int resolve_overloaded_unification PROTO((tree, tree, tree, tree, |
4393e105 | 97 | unification_kind_t, int)); |
e97e5263 | 98 | static int try_one_overload PROTO((tree, tree, tree, tree, tree, |
4393e105 MM |
99 | unification_kind_t, int)); |
100 | static int unify PROTO((tree, tree, tree, tree, int)); | |
49c249e1 JM |
101 | static void add_pending_template PROTO((tree)); |
102 | static int push_tinst_level PROTO((tree)); | |
103 | static tree classtype_mangled_name PROTO((tree)); | |
36a117a5 | 104 | static char *mangle_class_name_for_template PROTO((char *, tree, tree)); |
49c249e1 | 105 | static tree tsubst_expr_values PROTO((tree, tree)); |
49c249e1 | 106 | static int list_eq PROTO((tree, tree)); |
36a117a5 | 107 | static tree get_class_bindings PROTO((tree, tree, tree)); |
744fac59 | 108 | static tree coerce_template_parms PROTO((tree, tree, tree, int, int)); |
dbfe2124 | 109 | static void tsubst_enum PROTO((tree, tree, tree)); |
98c1c668 | 110 | static tree add_to_template_args PROTO((tree, tree)); |
36a117a5 | 111 | static tree add_outermost_template_args PROTO((tree, tree)); |
830bfa74 MM |
112 | static void maybe_adjust_types_for_deduction PROTO((unification_kind_t, tree*, |
113 | tree*)); | |
050367a3 | 114 | static int type_unification_real PROTO((tree, tree, tree, tree, |
4393e105 | 115 | int, unification_kind_t, int)); |
386b8a85 | 116 | static void note_template_header PROTO((int)); |
840b09b4 | 117 | static tree maybe_fold_nontype_arg PROTO((tree)); |
e1467ff2 | 118 | static tree convert_nontype_argument PROTO((tree, tree)); |
8b5b8b7c MM |
119 | static tree convert_template_argument PROTO ((tree, tree, tree, int, |
120 | int , tree)); | |
76b9a14d | 121 | static tree get_bindings_overload PROTO((tree, tree, tree)); |
050367a3 | 122 | static int for_each_template_parm PROTO((tree, tree_fn_t, void*)); |
4b580446 | 123 | static tree build_template_parm_index PROTO((int, int, int, tree, tree)); |
69ac77ce JL |
124 | static int inline_needs_template_parms PROTO((tree)); |
125 | static void push_inline_template_parms_recursive PROTO((tree, int)); | |
126 | static tree retrieve_specialization PROTO((tree, tree)); | |
36a117a5 MM |
127 | static tree register_specialization PROTO((tree, tree, tree)); |
128 | static int unregister_specialization PROTO((tree, tree)); | |
69ac77ce JL |
129 | static tree reduce_template_parm_level PROTO((tree, tree, int)); |
130 | static tree build_template_decl PROTO((tree, tree)); | |
131 | static int mark_template_parm PROTO((tree, void *)); | |
132 | static tree tsubst_friend_function PROTO((tree, tree)); | |
6757edfe | 133 | static tree tsubst_friend_class PROTO((tree, tree)); |
69ac77ce | 134 | static tree get_bindings_real PROTO((tree, tree, tree, int)); |
04a81d94 | 135 | static int template_decl_level PROTO((tree)); |
a2b60a0e | 136 | static tree maybe_get_template_decl_from_type_decl PROTO((tree)); |
830bfa74 | 137 | static int check_cv_quals_for_unify PROTO((int, tree, tree)); |
4393e105 MM |
138 | static tree tsubst_template_arg_vector PROTO((tree, tree, int)); |
139 | static tree tsubst_template_parms PROTO((tree, tree, int)); | |
830bfa74 | 140 | static void regenerate_decl_from_template PROTO((tree, tree)); |
36a117a5 MM |
141 | static tree most_specialized PROTO((tree, tree, tree)); |
142 | static tree most_specialized_class PROTO((tree, tree)); | |
143 | static tree most_general_template PROTO((tree)); | |
144 | static void set_mangled_name_for_template_decl PROTO((tree)); | |
39c01e4c | 145 | static int template_class_depth_real PROTO((tree, int)); |
4393e105 | 146 | static tree tsubst_aggr_type PROTO((tree, tree, int, tree, int)); |
ae58fa02 | 147 | static tree tsubst_decl PROTO((tree, tree, tree, tree)); |
4393e105 MM |
148 | static tree tsubst_arg_types PROTO((tree, tree, int, tree)); |
149 | static tree tsubst_function_type PROTO((tree, tree, int, tree)); | |
6c30752f MM |
150 | static void check_specialization_scope PROTO((void)); |
151 | static tree process_partial_specialization PROTO((tree)); | |
61a127b3 | 152 | static void set_current_access_from_decl PROTO((tree)); |
6ba89f8e | 153 | static void check_default_tmpl_args PROTO((tree, tree, int, int)); |
4393e105 MM |
154 | static tree tsubst_call_declarator_parms PROTO((tree, tree, int, tree)); |
155 | static tree get_template_base_recursive PROTO((tree, tree, | |
156 | tree, tree, tree, int)); | |
00aeceec | 157 | static tree get_template_base PROTO((tree, tree, tree, tree)); |
4393e105 MM |
158 | static tree try_class_unification PROTO((tree, tree, tree, tree)); |
159 | static int coerce_template_template_parms PROTO((tree, tree, int, | |
160 | tree, tree)); | |
bf8f3f93 | 161 | static tree determine_specialization PROTO((tree, tree, tree *, int)); |
d8e178a0 KG |
162 | static int template_args_equal PROTO((tree, tree)); |
163 | static void print_template_context PROTO((int)); | |
36a117a5 MM |
164 | |
165 | /* We use TREE_VECs to hold template arguments. If there is only one | |
166 | level of template arguments, then the TREE_VEC contains the | |
167 | arguments directly. If there is more than one level of template | |
168 | arguments, then each entry in the TREE_VEC is itself a TREE_VEC, | |
169 | containing the template arguments for a single level. The first | |
170 | entry in the outer TREE_VEC is the outermost level of template | |
171 | parameters; the last is the innermost. | |
172 | ||
173 | It is incorrect to ever form a template argument vector containing | |
174 | only one level of arguments, but which is a TREE_VEC containing as | |
175 | its only entry the TREE_VEC for that level. */ | |
176 | ||
36a117a5 MM |
177 | /* Non-zero if the template arguments is actually a vector of vectors, |
178 | rather than just a vector. */ | |
179 | #define TMPL_ARGS_HAVE_MULTIPLE_LEVELS(NODE) \ | |
180 | (NODE != NULL_TREE \ | |
181 | && TREE_CODE (NODE) == TREE_VEC \ | |
182 | && TREE_VEC_LENGTH (NODE) > 0 \ | |
183 | && TREE_VEC_ELT (NODE, 0) != NULL_TREE \ | |
67ffc812 MM |
184 | && TREE_CODE (TREE_VEC_ELT (NODE, 0)) == TREE_VEC) |
185 | ||
e4a84209 MM |
186 | /* The depth of a template argument vector. When called directly by |
187 | the parser, we use a TREE_LIST rather than a TREE_VEC to represent | |
188 | template arguments. In fact, we may even see NULL_TREE if there | |
189 | are no template arguments. In both of those cases, there is only | |
190 | one level of template arguments. */ | |
191 | #define TMPL_ARGS_DEPTH(NODE) \ | |
192 | (TMPL_ARGS_HAVE_MULTIPLE_LEVELS (NODE) ? TREE_VEC_LENGTH (NODE) : 1) | |
193 | ||
36a117a5 MM |
194 | /* The LEVELth level of the template ARGS. Note that template |
195 | parameter levels are indexed from 1, not from 0. */ | |
196 | #define TMPL_ARGS_LEVEL(ARGS, LEVEL) \ | |
197 | (TMPL_ARGS_HAVE_MULTIPLE_LEVELS (ARGS) \ | |
198 | ? TREE_VEC_ELT ((ARGS), (LEVEL) - 1) : ARGS) | |
199 | ||
200 | /* Set the LEVELth level of the template ARGS to VAL. This macro does | |
201 | not work with single-level argument vectors. */ | |
202 | #define SET_TMPL_ARGS_LEVEL(ARGS, LEVEL, VAL) \ | |
203 | (TREE_VEC_ELT ((ARGS), (LEVEL) - 1) = (VAL)) | |
204 | ||
205 | /* Accesses the IDXth parameter in the LEVELth level of the ARGS. */ | |
206 | #define TMPL_ARG(ARGS, LEVEL, IDX) \ | |
207 | (TREE_VEC_ELT (TMPL_ARGS_LEVEL (ARGS, LEVEL), IDX)) | |
208 | ||
209 | /* Set the IDXth element in the LEVELth level of ARGS to VAL. This | |
210 | macro does not work with single-level argument vectors. */ | |
211 | #define SET_TMPL_ARG(ARGS, LEVEL, IDX, VAL) \ | |
212 | (TREE_VEC_ELT (TREE_VEC_ELT ((ARGS), (LEVEL) - 1), (IDX)) = (VAL)) | |
213 | ||
e4a84209 MM |
214 | /* Given a single level of template arguments in NODE, return the |
215 | number of arguments. */ | |
216 | #define NUM_TMPL_ARGS(NODE) \ | |
217 | ((NODE) == NULL_TREE ? 0 \ | |
218 | : (TREE_CODE (NODE) == TREE_VEC \ | |
219 | ? TREE_VEC_LENGTH (NODE) : list_length (NODE))) | |
220 | ||
36a117a5 MM |
221 | /* The number of levels of template parameters given by NODE. */ |
222 | #define TMPL_PARMS_DEPTH(NODE) \ | |
223 | (TREE_INT_CST_HIGH (TREE_PURPOSE (NODE))) | |
224 | ||
e1467ff2 MM |
225 | /* Do any processing required when DECL (a member template declaration |
226 | using TEMPLATE_PARAMETERS as its innermost parameter list) is | |
227 | finished. Returns the TEMPLATE_DECL corresponding to DECL, unless | |
228 | it is a specialization, in which case the DECL itself is returned. */ | |
229 | ||
230 | tree | |
61a127b3 | 231 | finish_member_template_decl (decl) |
e1467ff2 MM |
232 | tree decl; |
233 | { | |
93cdc044 JM |
234 | if (decl == NULL_TREE || decl == void_type_node) |
235 | return NULL_TREE; | |
3ddfb0e6 MM |
236 | else if (decl == error_mark_node) |
237 | /* By returning NULL_TREE, the parser will just ignore this | |
238 | declaration. We have already issued the error. */ | |
239 | return NULL_TREE; | |
93cdc044 JM |
240 | else if (TREE_CODE (decl) == TREE_LIST) |
241 | { | |
5f311aec | 242 | /* Assume that the class is the only declspec. */ |
93cdc044 | 243 | decl = TREE_VALUE (decl); |
8d019cef JM |
244 | if (IS_AGGR_TYPE (decl) && CLASSTYPE_TEMPLATE_INFO (decl) |
245 | && ! CLASSTYPE_TEMPLATE_SPECIALIZATION (decl)) | |
93cdc044 JM |
246 | { |
247 | tree tmpl = CLASSTYPE_TI_TEMPLATE (decl); | |
248 | check_member_template (tmpl); | |
249 | return tmpl; | |
250 | } | |
8d019cef | 251 | return NULL_TREE; |
93cdc044 | 252 | } |
a1da6cba | 253 | else if (DECL_TEMPLATE_INFO (decl)) |
e1467ff2 | 254 | { |
a1da6cba MM |
255 | if (!DECL_TEMPLATE_SPECIALIZATION (decl)) |
256 | { | |
257 | check_member_template (DECL_TI_TEMPLATE (decl)); | |
258 | return DECL_TI_TEMPLATE (decl); | |
259 | } | |
260 | else | |
261 | return decl; | |
262 | } | |
263 | else | |
8251199e | 264 | cp_error ("invalid member template declaration `%D'", decl); |
e1467ff2 | 265 | |
a1da6cba | 266 | return error_mark_node; |
f84b4be9 | 267 | } |
e1467ff2 | 268 | |
f84b4be9 JM |
269 | /* Returns the template nesting level of the indicated class TYPE. |
270 | ||
271 | For example, in: | |
272 | template <class T> | |
273 | struct A | |
274 | { | |
275 | template <class U> | |
276 | struct B {}; | |
277 | }; | |
278 | ||
39c01e4c MM |
279 | A<T>::B<U> has depth two, while A<T> has depth one. |
280 | Both A<T>::B<int> and A<int>::B<U> have depth one, if | |
281 | COUNT_SPECIALIZATIONS is 0 or if they are instantiations, not | |
282 | specializations. | |
283 | ||
284 | This function is guaranteed to return 0 if passed NULL_TREE so | |
285 | that, for example, `template_class_depth (current_class_type)' is | |
286 | always safe. */ | |
f84b4be9 | 287 | |
e9659ab0 | 288 | static int |
39c01e4c | 289 | template_class_depth_real (type, count_specializations) |
f84b4be9 | 290 | tree type; |
39c01e4c | 291 | int count_specializations; |
f84b4be9 | 292 | { |
93cdc044 | 293 | int depth; |
f84b4be9 | 294 | |
2c73f9f5 | 295 | for (depth = 0; |
ed44da02 MM |
296 | type && TREE_CODE (type) != NAMESPACE_DECL; |
297 | type = (TREE_CODE (type) == FUNCTION_DECL) | |
298 | ? DECL_REAL_CONTEXT (type) : TYPE_CONTEXT (type)) | |
299 | { | |
300 | if (TREE_CODE (type) != FUNCTION_DECL) | |
301 | { | |
302 | if (CLASSTYPE_TEMPLATE_INFO (type) | |
303 | && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (type)) | |
304 | && ((count_specializations | |
305 | && CLASSTYPE_TEMPLATE_SPECIALIZATION (type)) | |
306 | || uses_template_parms (CLASSTYPE_TI_ARGS (type)))) | |
307 | ++depth; | |
308 | } | |
309 | else | |
310 | { | |
311 | if (DECL_TEMPLATE_INFO (type) | |
312 | && PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (type)) | |
313 | && ((count_specializations | |
314 | && DECL_TEMPLATE_SPECIALIZATION (type)) | |
315 | || uses_template_parms (DECL_TI_ARGS (type)))) | |
316 | ++depth; | |
317 | } | |
318 | } | |
f84b4be9 JM |
319 | |
320 | return depth; | |
e1467ff2 | 321 | } |
98c1c668 | 322 | |
39c01e4c MM |
323 | /* Returns the template nesting level of the indicated class TYPE. |
324 | Like template_class_depth_real, but instantiations do not count in | |
325 | the depth. */ | |
326 | ||
327 | int | |
328 | template_class_depth (type) | |
329 | tree type; | |
330 | { | |
331 | return template_class_depth_real (type, /*count_specializations=*/0); | |
332 | } | |
333 | ||
cae40af6 JM |
334 | /* Returns 1 if processing DECL as part of do_pending_inlines |
335 | needs us to push template parms. */ | |
336 | ||
337 | static int | |
338 | inline_needs_template_parms (decl) | |
339 | tree decl; | |
340 | { | |
341 | if (! DECL_TEMPLATE_INFO (decl)) | |
342 | return 0; | |
f84b4be9 | 343 | |
36a117a5 | 344 | return (TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (most_general_template (decl))) |
cae40af6 JM |
345 | > (processing_template_decl + DECL_TEMPLATE_SPECIALIZATION (decl))); |
346 | } | |
347 | ||
348 | /* Subroutine of maybe_begin_member_template_processing. | |
349 | Push the template parms in PARMS, starting from LEVELS steps into the | |
350 | chain, and ending at the beginning, since template parms are listed | |
351 | innermost first. */ | |
352 | ||
353 | static void | |
354 | push_inline_template_parms_recursive (parmlist, levels) | |
355 | tree parmlist; | |
356 | int levels; | |
357 | { | |
358 | tree parms = TREE_VALUE (parmlist); | |
359 | int i; | |
360 | ||
361 | if (levels > 1) | |
362 | push_inline_template_parms_recursive (TREE_CHAIN (parmlist), levels - 1); | |
786b5245 | 363 | |
98c1c668 | 364 | ++processing_template_decl; |
cae40af6 | 365 | current_template_parms |
98c1c668 JM |
366 | = tree_cons (build_int_2 (0, processing_template_decl), |
367 | parms, current_template_parms); | |
cae40af6 JM |
368 | TEMPLATE_PARMS_FOR_INLINE (current_template_parms) = 1; |
369 | ||
786b5245 | 370 | pushlevel (0); |
98c1c668 JM |
371 | for (i = 0; i < TREE_VEC_LENGTH (parms); ++i) |
372 | { | |
786b5245 MM |
373 | tree parm = TREE_VALUE (TREE_VEC_ELT (parms, i)); |
374 | my_friendly_assert (TREE_CODE_CLASS (TREE_CODE (parm)) == 'd', 0); | |
cae40af6 | 375 | |
98c1c668 JM |
376 | switch (TREE_CODE (parm)) |
377 | { | |
786b5245 | 378 | case TYPE_DECL: |
73b0fce8 | 379 | case TEMPLATE_DECL: |
98c1c668 JM |
380 | pushdecl (parm); |
381 | break; | |
786b5245 MM |
382 | |
383 | case PARM_DECL: | |
384 | { | |
fc03edb3 MM |
385 | /* Make a CONST_DECL as is done in process_template_parm. |
386 | It is ugly that we recreate this here; the original | |
387 | version built in process_template_parm is no longer | |
388 | available. */ | |
786b5245 MM |
389 | tree decl = build_decl (CONST_DECL, DECL_NAME (parm), |
390 | TREE_TYPE (parm)); | |
fc03edb3 | 391 | SET_DECL_ARTIFICIAL (decl); |
786b5245 | 392 | DECL_INITIAL (decl) = DECL_INITIAL (parm); |
fc03edb3 | 393 | DECL_TEMPLATE_PARM_P (decl) = 1; |
786b5245 MM |
394 | pushdecl (decl); |
395 | } | |
cae40af6 | 396 | break; |
786b5245 | 397 | |
98c1c668 JM |
398 | default: |
399 | my_friendly_abort (0); | |
400 | } | |
401 | } | |
402 | } | |
403 | ||
cae40af6 JM |
404 | /* Restore the template parameter context for a member template or |
405 | a friend template defined in a class definition. */ | |
406 | ||
407 | void | |
408 | maybe_begin_member_template_processing (decl) | |
409 | tree decl; | |
410 | { | |
411 | tree parms; | |
3dcaad8b | 412 | int levels = 0; |
cae40af6 | 413 | |
3dcaad8b MM |
414 | if (inline_needs_template_parms (decl)) |
415 | { | |
416 | parms = DECL_TEMPLATE_PARMS (most_general_template (decl)); | |
417 | levels = TMPL_PARMS_DEPTH (parms) - processing_template_decl; | |
cae40af6 | 418 | |
3dcaad8b MM |
419 | if (DECL_TEMPLATE_SPECIALIZATION (decl)) |
420 | { | |
421 | --levels; | |
422 | parms = TREE_CHAIN (parms); | |
423 | } | |
cae40af6 | 424 | |
3dcaad8b | 425 | push_inline_template_parms_recursive (parms, levels); |
cae40af6 JM |
426 | } |
427 | ||
3dcaad8b MM |
428 | /* Remember how many levels of template parameters we pushed so that |
429 | we can pop them later. */ | |
430 | if (!inline_parm_levels) | |
431 | VARRAY_INT_INIT (inline_parm_levels, 4, "inline_parm_levels"); | |
432 | if (inline_parm_levels_used == inline_parm_levels->num_elements) | |
433 | VARRAY_GROW (inline_parm_levels, 2 * inline_parm_levels_used); | |
434 | VARRAY_INT (inline_parm_levels, inline_parm_levels_used) = levels; | |
435 | ++inline_parm_levels_used; | |
cae40af6 JM |
436 | } |
437 | ||
98c1c668 JM |
438 | /* Undo the effects of begin_member_template_processing. */ |
439 | ||
440 | void | |
b370501f | 441 | maybe_end_member_template_processing () |
98c1c668 | 442 | { |
3dcaad8b MM |
443 | int i; |
444 | ||
445 | if (!inline_parm_levels_used) | |
98c1c668 JM |
446 | return; |
447 | ||
3dcaad8b MM |
448 | --inline_parm_levels_used; |
449 | for (i = 0; | |
450 | i < VARRAY_INT (inline_parm_levels, inline_parm_levels_used); | |
451 | ++i) | |
cae40af6 JM |
452 | { |
453 | --processing_template_decl; | |
454 | current_template_parms = TREE_CHAIN (current_template_parms); | |
455 | poplevel (0, 0, 0); | |
456 | } | |
98c1c668 JM |
457 | } |
458 | ||
cae40af6 | 459 | /* Returns non-zero iff T is a member template function. We must be |
f84b4be9 | 460 | careful as in |
75650646 MM |
461 | |
462 | template <class T> class C { void f(); } | |
463 | ||
464 | Here, f is a template function, and a member, but not a member | |
465 | template. This function does not concern itself with the origin of | |
466 | T, only its present state. So if we have | |
467 | ||
468 | template <class T> class C { template <class U> void f(U); } | |
469 | ||
470 | then neither C<int>::f<char> nor C<T>::f<double> is considered | |
f181d4ae MM |
471 | to be a member template. But, `template <class U> void |
472 | C<int>::f(U)' is considered a member template. */ | |
98c1c668 | 473 | |
cae40af6 JM |
474 | int |
475 | is_member_template (t) | |
98c1c668 JM |
476 | tree t; |
477 | { | |
f181d4ae | 478 | if (!DECL_FUNCTION_TEMPLATE_P (t)) |
75650646 | 479 | /* Anything that isn't a function or a template function is |
aa5f3bad MM |
480 | certainly not a member template. */ |
481 | return 0; | |
482 | ||
cae40af6 JM |
483 | /* A local class can't have member templates. */ |
484 | if (hack_decl_function_context (t)) | |
485 | return 0; | |
486 | ||
f181d4ae | 487 | return (DECL_FUNCTION_MEMBER_P (DECL_TEMPLATE_RESULT (t)) |
f84b4be9 JM |
488 | /* If there are more levels of template parameters than |
489 | there are template classes surrounding the declaration, | |
490 | then we have a member template. */ | |
f181d4ae MM |
491 | && (TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (t)) > |
492 | template_class_depth (DECL_CLASS_CONTEXT (t)))); | |
f84b4be9 | 493 | } |
98c1c668 | 494 | |
ba4f4e5d | 495 | #if 0 /* UNUSED */ |
2ee4e084 MM |
496 | /* Returns non-zero iff T is a member template class. See |
497 | is_member_template for a description of what precisely constitutes | |
498 | a member template. */ | |
499 | ||
500 | int | |
501 | is_member_template_class (t) | |
502 | tree t; | |
503 | { | |
504 | if (!DECL_CLASS_TEMPLATE_P (t)) | |
505 | /* Anything that isn't a class template, is certainly not a member | |
506 | template. */ | |
507 | return 0; | |
508 | ||
509 | if (!DECL_CLASS_SCOPE_P (t)) | |
510 | /* Anything whose context isn't a class type is surely not a | |
511 | member template. */ | |
512 | return 0; | |
513 | ||
514 | /* If there are more levels of template parameters than there are | |
515 | template classes surrounding the declaration, then we have a | |
516 | member template. */ | |
36a117a5 | 517 | return (TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (t)) > |
2ee4e084 MM |
518 | template_class_depth (DECL_CONTEXT (t))); |
519 | } | |
ba4f4e5d | 520 | #endif |
2ee4e084 | 521 | |
36a117a5 MM |
522 | /* Return a new template argument vector which contains all of ARGS, |
523 | but has as its innermost set of arguments the EXTRA_ARGS. The | |
524 | resulting vector will be built on a temporary obstack, and so must | |
525 | be explicitly copied to the permanent obstack, if required. */ | |
e6f1275f JM |
526 | |
527 | static tree | |
36a117a5 MM |
528 | add_to_template_args (args, extra_args) |
529 | tree args; | |
530 | tree extra_args; | |
e6f1275f | 531 | { |
36a117a5 MM |
532 | tree new_args; |
533 | int extra_depth; | |
534 | int i; | |
535 | int j; | |
e6f1275f | 536 | |
36a117a5 MM |
537 | extra_depth = TMPL_ARGS_DEPTH (extra_args); |
538 | new_args = make_temp_vec (TMPL_ARGS_DEPTH (args) + extra_depth); | |
e6f1275f | 539 | |
36a117a5 MM |
540 | for (i = 1; i <= TMPL_ARGS_DEPTH (args); ++i) |
541 | SET_TMPL_ARGS_LEVEL (new_args, i, TMPL_ARGS_LEVEL (args, i)); | |
e6f1275f | 542 | |
36a117a5 MM |
543 | for (j = 1; j <= extra_depth; ++j, ++i) |
544 | SET_TMPL_ARGS_LEVEL (new_args, i, TMPL_ARGS_LEVEL (extra_args, j)); | |
545 | ||
e6f1275f JM |
546 | return new_args; |
547 | } | |
548 | ||
36a117a5 MM |
549 | /* Like add_to_template_args, but only the outermost ARGS are added to |
550 | the EXTRA_ARGS. In particular, all but TMPL_ARGS_DEPTH | |
551 | (EXTRA_ARGS) levels are added. This function is used to combine | |
552 | the template arguments from a partial instantiation with the | |
553 | template arguments used to attain the full instantiation from the | |
554 | partial instantiation. */ | |
98c1c668 | 555 | |
4966381a | 556 | static tree |
36a117a5 | 557 | add_outermost_template_args (args, extra_args) |
98c1c668 JM |
558 | tree args; |
559 | tree extra_args; | |
560 | { | |
561 | tree new_args; | |
562 | ||
e4a84209 MM |
563 | /* If there are more levels of EXTRA_ARGS than there are ARGS, |
564 | something very fishy is going on. */ | |
565 | my_friendly_assert (TMPL_ARGS_DEPTH (args) >= TMPL_ARGS_DEPTH (extra_args), | |
566 | 0); | |
567 | ||
568 | /* If *all* the new arguments will be the EXTRA_ARGS, just return | |
569 | them. */ | |
570 | if (TMPL_ARGS_DEPTH (args) == TMPL_ARGS_DEPTH (extra_args)) | |
571 | return extra_args; | |
572 | ||
36a117a5 MM |
573 | /* For the moment, we make ARGS look like it contains fewer levels. */ |
574 | TREE_VEC_LENGTH (args) -= TMPL_ARGS_DEPTH (extra_args); | |
575 | ||
576 | new_args = add_to_template_args (args, extra_args); | |
98c1c668 | 577 | |
36a117a5 MM |
578 | /* Now, we restore ARGS to its full dimensions. */ |
579 | TREE_VEC_LENGTH (args) += TMPL_ARGS_DEPTH (extra_args); | |
98c1c668 JM |
580 | |
581 | return new_args; | |
582 | } | |
5566b478 MS |
583 | |
584 | /* We've got a template header coming up; push to a new level for storing | |
585 | the parms. */ | |
8d08fdba | 586 | |
8d08fdba MS |
587 | void |
588 | begin_template_parm_list () | |
589 | { | |
6757edfe MM |
590 | /* We use a non-tag-transparent scope here, which causes pushtag to |
591 | put tags in this scope, rather than in the enclosing class or | |
592 | namespace scope. This is the right thing, since we want | |
593 | TEMPLATE_DECLS, and not TYPE_DECLS for template classes. For a | |
594 | global template class, push_template_decl handles putting the | |
595 | TEMPLATE_DECL into top-level scope. For a nested template class, | |
596 | e.g.: | |
597 | ||
598 | template <class T> struct S1 { | |
599 | template <class T> struct S2 {}; | |
600 | }; | |
601 | ||
602 | pushtag contains special code to call pushdecl_with_scope on the | |
603 | TEMPLATE_DECL for S2. */ | |
8d08fdba | 604 | pushlevel (0); |
5566b478 | 605 | declare_pseudo_global_level (); |
5156628f | 606 | ++processing_template_decl; |
67ffc812 | 607 | ++processing_template_parmlist; |
386b8a85 JM |
608 | note_template_header (0); |
609 | } | |
610 | ||
6c30752f MM |
611 | /* This routine is called when a specialization is declared. If it is |
612 | illegal to declare a specialization here, an error is reported. */ | |
613 | ||
e9659ab0 | 614 | static void |
6c30752f MM |
615 | check_specialization_scope () |
616 | { | |
617 | tree scope = current_scope (); | |
3ddfb0e6 | 618 | |
6c30752f MM |
619 | /* [temp.expl.spec] |
620 | ||
621 | An explicit specialization shall be declared in the namespace of | |
622 | which the template is a member, or, for member templates, in the | |
623 | namespace of which the enclosing class or enclosing class | |
624 | template is a member. An explicit specialization of a member | |
625 | function, member class or static data member of a class template | |
626 | shall be declared in the namespace of which the class template | |
627 | is a member. */ | |
628 | if (scope && TREE_CODE (scope) != NAMESPACE_DECL) | |
8251199e | 629 | cp_error ("explicit specialization in non-namespace scope `%D'", |
6c30752f | 630 | scope); |
3ddfb0e6 | 631 | |
6c30752f MM |
632 | /* [temp.expl.spec] |
633 | ||
634 | In an explicit specialization declaration for a member of a class | |
635 | template or a member template that appears in namespace scope, | |
636 | the member template and some of its enclosing class templates may | |
637 | remain unspecialized, except that the declaration shall not | |
638 | explicitly specialize a class member template if its enclosing | |
639 | class templates are not explicitly specialized as well. */ | |
640 | if (current_template_parms) | |
fd4de5ff | 641 | cp_error ("enclosing class templates are not explicitly specialized"); |
6c30752f MM |
642 | } |
643 | ||
386b8a85 JM |
644 | /* We've just seen template <>. */ |
645 | ||
646 | void | |
647 | begin_specialization () | |
648 | { | |
649 | note_template_header (1); | |
6c30752f | 650 | check_specialization_scope (); |
386b8a85 JM |
651 | } |
652 | ||
386b8a85 JM |
653 | /* Called at then end of processing a declaration preceeded by |
654 | template<>. */ | |
655 | ||
656 | void | |
657 | end_specialization () | |
658 | { | |
659 | reset_specialization (); | |
660 | } | |
661 | ||
386b8a85 JM |
662 | /* Any template <>'s that we have seen thus far are not referring to a |
663 | function specialization. */ | |
664 | ||
665 | void | |
666 | reset_specialization () | |
667 | { | |
668 | processing_specialization = 0; | |
669 | template_header_count = 0; | |
670 | } | |
671 | ||
386b8a85 JM |
672 | /* We've just seen a template header. If SPECIALIZATION is non-zero, |
673 | it was of the form template <>. */ | |
674 | ||
4966381a | 675 | static void |
386b8a85 JM |
676 | note_template_header (specialization) |
677 | int specialization; | |
678 | { | |
679 | processing_specialization = specialization; | |
680 | template_header_count++; | |
681 | } | |
682 | ||
75650646 | 683 | /* We're beginning an explicit instantiation. */ |
386b8a85 | 684 | |
75650646 MM |
685 | void |
686 | begin_explicit_instantiation () | |
386b8a85 | 687 | { |
75650646 MM |
688 | ++processing_explicit_instantiation; |
689 | } | |
386b8a85 | 690 | |
386b8a85 | 691 | |
75650646 MM |
692 | void |
693 | end_explicit_instantiation () | |
694 | { | |
695 | my_friendly_assert(processing_explicit_instantiation > 0, 0); | |
696 | --processing_explicit_instantiation; | |
697 | } | |
386b8a85 | 698 | |
36a117a5 MM |
699 | /* The TYPE is being declared. If it is a template type, that means it |
700 | is a partial specialization. Do appropriate error-checking. */ | |
701 | ||
702 | void | |
703 | maybe_process_partial_specialization (type) | |
704 | tree type; | |
705 | { | |
706 | if (IS_AGGR_TYPE (type) && CLASSTYPE_USE_TEMPLATE (type)) | |
707 | { | |
708 | if (CLASSTYPE_IMPLICIT_INSTANTIATION (type) | |
709 | && TYPE_SIZE (type) == NULL_TREE) | |
710 | { | |
700466c2 JM |
711 | if (current_namespace |
712 | != decl_namespace_context (CLASSTYPE_TI_TEMPLATE (type))) | |
713 | { | |
714 | cp_pedwarn ("specializing `%#T' in different namespace", type); | |
715 | cp_pedwarn_at (" from definition of `%#D'", | |
716 | CLASSTYPE_TI_TEMPLATE (type)); | |
717 | } | |
36a117a5 MM |
718 | SET_CLASSTYPE_TEMPLATE_SPECIALIZATION (type); |
719 | if (processing_template_decl) | |
720 | push_template_decl (TYPE_MAIN_DECL (type)); | |
721 | } | |
722 | else if (CLASSTYPE_TEMPLATE_INSTANTIATION (type)) | |
8251199e | 723 | cp_error ("specialization of `%T' after instantiation", type); |
36a117a5 | 724 | } |
20496fa2 JM |
725 | else if (processing_specialization) |
726 | cp_error ("explicit specialization of non-template `%T'", type); | |
36a117a5 MM |
727 | } |
728 | ||
75650646 MM |
729 | /* Retrieve the specialization (in the sense of [temp.spec] - a |
730 | specialization is either an instantiation or an explicit | |
731 | specialization) of TMPL for the given template ARGS. If there is | |
732 | no such specialization, return NULL_TREE. The ARGS are a vector of | |
733 | arguments, or a vector of vectors of arguments, in the case of | |
734 | templates with more than one level of parameters. */ | |
735 | ||
736 | static tree | |
737 | retrieve_specialization (tmpl, args) | |
738 | tree tmpl; | |
739 | tree args; | |
740 | { | |
741 | tree s; | |
742 | ||
743 | my_friendly_assert (TREE_CODE (tmpl) == TEMPLATE_DECL, 0); | |
744 | ||
36a117a5 MM |
745 | /* There should be as many levels of arguments as there are |
746 | levels of parameters. */ | |
747 | my_friendly_assert (TMPL_ARGS_DEPTH (args) | |
748 | == TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (tmpl)), | |
749 | 0); | |
750 | ||
75650646 MM |
751 | for (s = DECL_TEMPLATE_SPECIALIZATIONS (tmpl); |
752 | s != NULL_TREE; | |
753 | s = TREE_CHAIN (s)) | |
754 | if (comp_template_args (TREE_PURPOSE (s), args)) | |
755 | return TREE_VALUE (s); | |
756 | ||
757 | return NULL_TREE; | |
386b8a85 JM |
758 | } |
759 | ||
6757edfe MM |
760 | /* Returns non-zero iff DECL is a specialization of TMPL. */ |
761 | ||
762 | int | |
763 | is_specialization_of (decl, tmpl) | |
764 | tree decl; | |
765 | tree tmpl; | |
766 | { | |
767 | tree t; | |
768 | ||
769 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
770 | { | |
771 | for (t = decl; | |
772 | t != NULL_TREE; | |
773 | t = DECL_TEMPLATE_INFO (t) ? DECL_TI_TEMPLATE (t) : NULL_TREE) | |
774 | if (t == tmpl) | |
775 | return 1; | |
776 | } | |
777 | else | |
778 | { | |
779 | my_friendly_assert (TREE_CODE (decl) == TYPE_DECL, 0); | |
780 | ||
781 | for (t = TREE_TYPE (decl); | |
782 | t != NULL_TREE; | |
783 | t = CLASSTYPE_USE_TEMPLATE (t) | |
784 | ? TREE_TYPE (CLASSTYPE_TI_TEMPLATE (t)) : NULL_TREE) | |
3bfdc719 MM |
785 | if (same_type_p (TYPE_MAIN_VARIANT (t), |
786 | TYPE_MAIN_VARIANT (TREE_TYPE (tmpl)))) | |
6757edfe MM |
787 | return 1; |
788 | } | |
386b8a85 | 789 | |
6757edfe MM |
790 | return 0; |
791 | } | |
75650646 MM |
792 | |
793 | /* Register the specialization SPEC as a specialization of TMPL with | |
36a117a5 MM |
794 | the indicated ARGS. Returns SPEC, or an equivalent prior |
795 | declaration, if available. */ | |
75650646 | 796 | |
36a117a5 | 797 | static tree |
75650646 MM |
798 | register_specialization (spec, tmpl, args) |
799 | tree spec; | |
800 | tree tmpl; | |
801 | tree args; | |
802 | { | |
803 | tree s; | |
804 | ||
805 | my_friendly_assert (TREE_CODE (tmpl) == TEMPLATE_DECL, 0); | |
806 | ||
36a117a5 MM |
807 | if (TREE_CODE (spec) == FUNCTION_DECL |
808 | && uses_template_parms (DECL_TI_ARGS (spec))) | |
809 | /* This is the FUNCTION_DECL for a partial instantiation. Don't | |
810 | register it; we want the corresponding TEMPLATE_DECL instead. | |
811 | We use `uses_template_parms (DECL_TI_ARGS (spec))' rather than | |
812 | the more obvious `uses_template_parms (spec)' to avoid problems | |
813 | with default function arguments. In particular, given | |
814 | something like this: | |
815 | ||
816 | template <class T> void f(T t1, T t = T()) | |
817 | ||
818 | the default argument expression is not substituted for in an | |
819 | instantiation unless and until it is actually needed. */ | |
820 | return spec; | |
75650646 | 821 | |
36a117a5 MM |
822 | /* There should be as many levels of arguments as there are |
823 | levels of parameters. */ | |
824 | my_friendly_assert (TMPL_ARGS_DEPTH (args) | |
825 | == TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (tmpl)), | |
826 | 0); | |
827 | ||
75650646 MM |
828 | for (s = DECL_TEMPLATE_SPECIALIZATIONS (tmpl); |
829 | s != NULL_TREE; | |
830 | s = TREE_CHAIN (s)) | |
831 | if (comp_template_args (TREE_PURPOSE (s), args)) | |
832 | { | |
833 | tree fn = TREE_VALUE (s); | |
834 | ||
835 | if (DECL_TEMPLATE_SPECIALIZATION (spec)) | |
836 | { | |
837 | if (DECL_TEMPLATE_INSTANTIATION (fn)) | |
838 | { | |
839 | if (TREE_USED (fn) | |
840 | || DECL_EXPLICIT_INSTANTIATION (fn)) | |
841 | { | |
8251199e | 842 | cp_error ("specialization of %D after instantiation", |
75650646 | 843 | fn); |
36a117a5 | 844 | return spec; |
75650646 MM |
845 | } |
846 | else | |
847 | { | |
848 | /* This situation should occur only if the first | |
849 | specialization is an implicit instantiation, | |
850 | the second is an explicit specialization, and | |
851 | the implicit instantiation has not yet been | |
852 | used. That situation can occur if we have | |
36a117a5 MM |
853 | implicitly instantiated a member function and |
854 | then specialized it later. | |
855 | ||
856 | We can also wind up here if a friend | |
857 | declaration that looked like an instantiation | |
858 | turns out to be a specialization: | |
859 | ||
860 | template <class T> void foo(T); | |
861 | class S { friend void foo<>(int) }; | |
862 | template <> void foo(int); | |
863 | ||
864 | We transform the existing DECL in place so that | |
865 | any pointers to it become pointers to the | |
fbf1c34b MM |
866 | updated declaration. |
867 | ||
868 | If there was a definition for the template, but | |
869 | not for the specialization, we want this to | |
870 | look as if there is no definition, and vice | |
871 | versa. */ | |
872 | DECL_INITIAL (fn) = NULL_TREE; | |
873 | duplicate_decls (spec, fn); | |
874 | ||
875 | return fn; | |
75650646 MM |
876 | } |
877 | } | |
878 | else if (DECL_TEMPLATE_SPECIALIZATION (fn)) | |
879 | { | |
fbf1c34b MM |
880 | duplicate_decls (spec, fn); |
881 | return fn; | |
75650646 MM |
882 | } |
883 | } | |
884 | } | |
885 | ||
886 | DECL_TEMPLATE_SPECIALIZATIONS (tmpl) | |
887 | = perm_tree_cons (args, spec, DECL_TEMPLATE_SPECIALIZATIONS (tmpl)); | |
36a117a5 MM |
888 | |
889 | return spec; | |
890 | } | |
891 | ||
892 | /* Unregister the specialization SPEC as a specialization of TMPL. | |
893 | Returns nonzero if the SPEC was listed as a specialization of | |
894 | TMPL. */ | |
895 | ||
896 | static int | |
897 | unregister_specialization (spec, tmpl) | |
898 | tree spec; | |
899 | tree tmpl; | |
900 | { | |
901 | tree* s; | |
902 | ||
903 | for (s = &DECL_TEMPLATE_SPECIALIZATIONS (tmpl); | |
904 | *s != NULL_TREE; | |
905 | s = &TREE_CHAIN (*s)) | |
906 | if (TREE_VALUE (*s) == spec) | |
907 | { | |
908 | *s = TREE_CHAIN (*s); | |
909 | return 1; | |
910 | } | |
911 | ||
912 | return 0; | |
75650646 MM |
913 | } |
914 | ||
e1467ff2 MM |
915 | /* Print the list of candidate FNS in an error message. */ |
916 | ||
104bf76a | 917 | void |
e1467ff2 MM |
918 | print_candidates (fns) |
919 | tree fns; | |
920 | { | |
921 | tree fn; | |
922 | ||
d8e178a0 | 923 | const char *str = "candidates are:"; |
e1467ff2 MM |
924 | |
925 | for (fn = fns; fn != NULL_TREE; fn = TREE_CHAIN (fn)) | |
926 | { | |
d6479fe7 MM |
927 | tree f; |
928 | ||
929 | for (f = TREE_VALUE (fn); f; f = OVL_NEXT (f)) | |
930 | cp_error_at ("%s %+#D", str, OVL_CURRENT (f)); | |
e1467ff2 MM |
931 | str = " "; |
932 | } | |
933 | } | |
934 | ||
75650646 | 935 | /* Returns the template (one of the functions given by TEMPLATE_ID) |
e1467ff2 | 936 | which can be specialized to match the indicated DECL with the |
03017874 MM |
937 | explicit template args given in TEMPLATE_ID. The DECL may be |
938 | NULL_TREE if none is available. In that case, the functions in | |
939 | TEMPLATE_ID are non-members. | |
940 | ||
941 | If NEED_MEMBER_TEMPLATE is non-zero the function is known to be a | |
942 | specialization of a member template. | |
943 | ||
944 | The template args (those explicitly specified and those deduced) | |
945 | are output in a newly created vector *TARGS_OUT. | |
946 | ||
947 | If it is impossible to determine the result, an error message is | |
bf8f3f93 | 948 | issued. The error_mark_node is returned to indicate failure. */ |
75650646 | 949 | |
e9659ab0 | 950 | static tree |
e1467ff2 | 951 | determine_specialization (template_id, decl, targs_out, |
bf8f3f93 | 952 | need_member_template) |
386b8a85 | 953 | tree template_id; |
e1467ff2 | 954 | tree decl; |
386b8a85 JM |
955 | tree* targs_out; |
956 | int need_member_template; | |
386b8a85 | 957 | { |
386b8a85 | 958 | tree fn; |
03017874 MM |
959 | tree fns; |
960 | tree targs; | |
961 | tree explicit_targs; | |
962 | tree candidates = NULL_TREE; | |
963 | tree templates = NULL_TREE; | |
386b8a85 | 964 | |
e1467ff2 MM |
965 | *targs_out = NULL_TREE; |
966 | ||
f2e48b67 BK |
967 | if (template_id == error_mark_node) |
968 | return error_mark_node; | |
969 | ||
970 | fns = TREE_OPERAND (template_id, 0); | |
03017874 | 971 | explicit_targs = TREE_OPERAND (template_id, 1); |
f2e48b67 | 972 | |
27fafc8d JM |
973 | if (fns == error_mark_node) |
974 | return error_mark_node; | |
975 | ||
2c73f9f5 ML |
976 | /* Check for baselinks. */ |
977 | if (TREE_CODE (fns) == TREE_LIST) | |
978 | fns = TREE_VALUE (fns); | |
386b8a85 | 979 | |
2c73f9f5 | 980 | for (; fns; fns = OVL_NEXT (fns)) |
386b8a85 | 981 | { |
75650646 MM |
982 | tree tmpl; |
983 | ||
2c73f9f5 | 984 | fn = OVL_CURRENT (fns); |
03017874 MM |
985 | |
986 | if (TREE_CODE (fn) == TEMPLATE_DECL) | |
987 | /* DECL might be a specialization of FN. */ | |
988 | tmpl = fn; | |
989 | else if (need_member_template) | |
990 | /* FN is an ordinary member function, and we need a | |
991 | specialization of a member template. */ | |
992 | continue; | |
993 | else if (TREE_CODE (fn) != FUNCTION_DECL) | |
994 | /* We can get IDENTIFIER_NODEs here in certain erroneous | |
995 | cases. */ | |
996 | continue; | |
997 | else if (!DECL_FUNCTION_MEMBER_P (fn)) | |
998 | /* This is just an ordinary non-member function. Nothing can | |
999 | be a specialization of that. */ | |
1000 | continue; | |
75650646 | 1001 | else |
03017874 MM |
1002 | { |
1003 | tree decl_arg_types; | |
386b8a85 | 1004 | |
03017874 MM |
1005 | /* This is an ordinary member function. However, since |
1006 | we're here, we can assume it's enclosing class is a | |
1007 | template class. For example, | |
1008 | ||
1009 | template <typename T> struct S { void f(); }; | |
1010 | template <> void S<int>::f() {} | |
1011 | ||
1012 | Here, S<int>::f is a non-template, but S<int> is a | |
1013 | template class. If FN has the same type as DECL, we | |
1014 | might be in business. */ | |
1015 | if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)), | |
1016 | TREE_TYPE (TREE_TYPE (fn)))) | |
1017 | /* The return types differ. */ | |
1018 | continue; | |
1019 | ||
1020 | /* Adjust the type of DECL in case FN is a static member. */ | |
1021 | decl_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl)); | |
1022 | if (DECL_STATIC_FUNCTION_P (fn) | |
1023 | && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)) | |
1024 | decl_arg_types = TREE_CHAIN (decl_arg_types); | |
1025 | ||
1026 | if (compparms (TYPE_ARG_TYPES (TREE_TYPE (fn)), | |
1027 | decl_arg_types)) | |
1028 | /* They match! */ | |
1029 | candidates = tree_cons (NULL_TREE, fn, candidates); | |
1030 | ||
1031 | continue; | |
1032 | } | |
386b8a85 | 1033 | |
bf8f3f93 MM |
1034 | /* See whether this function might be a specialization of this |
1035 | template. */ | |
1036 | targs = get_bindings (tmpl, decl, explicit_targs); | |
03017874 MM |
1037 | |
1038 | if (!targs) | |
bf8f3f93 | 1039 | /* We cannot deduce template arguments that when used to |
03017874 MM |
1040 | specialize TMPL will produce DECL. */ |
1041 | continue; | |
1042 | ||
1043 | /* Save this template, and the arguments deduced. */ | |
1044 | templates = scratch_tree_cons (targs, tmpl, templates); | |
386b8a85 | 1045 | } |
03017874 | 1046 | |
bf8f3f93 | 1047 | if (templates && TREE_CHAIN (templates)) |
386b8a85 | 1048 | { |
03017874 MM |
1049 | /* We have: |
1050 | ||
1051 | [temp.expl.spec] | |
1052 | ||
1053 | It is possible for a specialization with a given function | |
1054 | signature to be instantiated from more than one function | |
1055 | template. In such cases, explicit specification of the | |
1056 | template arguments must be used to uniquely identify the | |
1057 | function template specialization being specialized. | |
1058 | ||
1059 | Note that here, there's no suggestion that we're supposed to | |
1060 | determine which of the candidate templates is most | |
1061 | specialized. However, we, also have: | |
1062 | ||
1063 | [temp.func.order] | |
1064 | ||
1065 | Partial ordering of overloaded function template | |
1066 | declarations is used in the following contexts to select | |
1067 | the function template to which a function template | |
1068 | specialization refers: | |
1069 | ||
1070 | -- when an explicit specialization refers to a function | |
1071 | template. | |
1072 | ||
1073 | So, we do use the partial ordering rules, at least for now. | |
1074 | This extension can only serve to make illegal programs legal, | |
1075 | so it's safe. And, there is strong anecdotal evidence that | |
1076 | the committee intended the partial ordering rules to apply; | |
1077 | the EDG front-end has that behavior, and John Spicer claims | |
1078 | that the committee simply forgot to delete the wording in | |
1079 | [temp.expl.spec]. */ | |
1080 | tree tmpl = most_specialized (templates, decl, explicit_targs); | |
1081 | if (tmpl && tmpl != error_mark_node) | |
1082 | { | |
1083 | targs = get_bindings (tmpl, decl, explicit_targs); | |
1084 | templates = scratch_tree_cons (targs, tmpl, NULL_TREE); | |
1085 | } | |
e1467ff2 MM |
1086 | } |
1087 | ||
03017874 | 1088 | if (templates == NULL_TREE && candidates == NULL_TREE) |
e1467ff2 | 1089 | { |
bf8f3f93 MM |
1090 | cp_error_at ("template-id `%D' for `%+D' does not match any template declaration", |
1091 | template_id, decl); | |
03017874 | 1092 | return error_mark_node; |
386b8a85 | 1093 | } |
03017874 | 1094 | else if ((templates && TREE_CHAIN (templates)) |
bf8f3f93 MM |
1095 | || (candidates && TREE_CHAIN (candidates)) |
1096 | || (templates && candidates)) | |
386b8a85 | 1097 | { |
bf8f3f93 MM |
1098 | cp_error_at ("ambiguous template specialization `%D' for `%+D'", |
1099 | template_id, decl); | |
1100 | chainon (candidates, templates); | |
1101 | print_candidates (candidates); | |
03017874 | 1102 | return error_mark_node; |
386b8a85 JM |
1103 | } |
1104 | ||
1105 | /* We have one, and exactly one, match. */ | |
03017874 MM |
1106 | if (candidates) |
1107 | { | |
1108 | /* It was a specialization of an ordinary member function in a | |
1109 | template class. */ | |
1110 | *targs_out = copy_node (DECL_TI_ARGS (TREE_VALUE (candidates))); | |
1111 | return DECL_TI_TEMPLATE (TREE_VALUE (candidates)); | |
1112 | } | |
1113 | ||
1114 | /* It was a specialization of a template. */ | |
1115 | targs = DECL_TI_ARGS (DECL_RESULT (TREE_VALUE (templates))); | |
1116 | if (TMPL_ARGS_HAVE_MULTIPLE_LEVELS (targs)) | |
1117 | { | |
1118 | *targs_out = copy_node (targs); | |
1119 | SET_TMPL_ARGS_LEVEL (*targs_out, | |
1120 | TMPL_ARGS_DEPTH (*targs_out), | |
1121 | TREE_PURPOSE (templates)); | |
1122 | } | |
1123 | else | |
1124 | *targs_out = TREE_PURPOSE (templates); | |
e1467ff2 | 1125 | return TREE_VALUE (templates); |
8d08fdba | 1126 | } |
6757edfe | 1127 | |
386b8a85 | 1128 | /* Check to see if the function just declared, as indicated in |
75650646 MM |
1129 | DECLARATOR, and in DECL, is a specialization of a function |
1130 | template. We may also discover that the declaration is an explicit | |
1131 | instantiation at this point. | |
1132 | ||
e1467ff2 | 1133 | Returns DECL, or an equivalent declaration that should be used |
03017874 MM |
1134 | instead if all goes well. Issues an error message if something is |
1135 | amiss. Returns error_mark_node if the error is not easily | |
1136 | recoverable. | |
75650646 | 1137 | |
75650646 MM |
1138 | FLAGS is a bitmask consisting of the following flags: |
1139 | ||
75650646 MM |
1140 | 2: The function has a definition. |
1141 | 4: The function is a friend. | |
75650646 MM |
1142 | |
1143 | The TEMPLATE_COUNT is the number of references to qualifying | |
1144 | template classes that appeared in the name of the function. For | |
1145 | example, in | |
1146 | ||
1147 | template <class T> struct S { void f(); }; | |
1148 | void S<int>::f(); | |
1149 | ||
1150 | the TEMPLATE_COUNT would be 1. However, explicitly specialized | |
1151 | classes are not counted in the TEMPLATE_COUNT, so that in | |
1152 | ||
1153 | template <class T> struct S {}; | |
1154 | template <> struct S<int> { void f(); } | |
36a117a5 | 1155 | template <> void S<int>::f(); |
75650646 MM |
1156 | |
1157 | the TEMPLATE_COUNT would be 0. (Note that this declaration is | |
1158 | illegal; there should be no template <>.) | |
1159 | ||
1160 | If the function is a specialization, it is marked as such via | |
1161 | DECL_TEMPLATE_SPECIALIZATION. Furthermore, its DECL_TEMPLATE_INFO | |
1162 | is set up correctly, and it is added to the list of specializations | |
1163 | for that template. */ | |
386b8a85 | 1164 | |
e1467ff2 | 1165 | tree |
27bb8339 | 1166 | check_explicit_specialization (declarator, decl, template_count, flags) |
386b8a85 JM |
1167 | tree declarator; |
1168 | tree decl; | |
1169 | int template_count; | |
1170 | int flags; | |
1171 | { | |
75650646 MM |
1172 | int have_def = flags & 2; |
1173 | int is_friend = flags & 4; | |
1174 | int specialization = 0; | |
e1467ff2 | 1175 | int explicit_instantiation = 0; |
fd4de5ff | 1176 | int member_specialization = 0; |
75650646 MM |
1177 | |
1178 | tree ctype = DECL_CLASS_CONTEXT (decl); | |
1179 | tree dname = DECL_NAME (decl); | |
386b8a85 | 1180 | |
fd4de5ff | 1181 | if (processing_specialization) |
386b8a85 | 1182 | { |
fd4de5ff | 1183 | /* The last template header was of the form template <>. */ |
75650646 | 1184 | |
fd4de5ff MM |
1185 | if (template_header_count > template_count) |
1186 | { | |
1187 | /* There were more template headers than qualifying template | |
1188 | classes. */ | |
1189 | if (template_header_count - template_count > 1) | |
03017874 MM |
1190 | /* There shouldn't be that many template parameter lists. |
1191 | There can be at most one parameter list for every | |
1192 | qualifying class, plus one for the function itself. */ | |
fd4de5ff | 1193 | cp_error ("too many template parameter lists in declaration of `%D'", decl); |
75650646 | 1194 | |
fd4de5ff MM |
1195 | SET_DECL_TEMPLATE_SPECIALIZATION (decl); |
1196 | if (ctype) | |
1197 | member_specialization = 1; | |
1198 | else | |
1199 | specialization = 1; | |
75650646 | 1200 | } |
fd4de5ff | 1201 | else if (template_header_count == template_count) |
75650646 | 1202 | { |
fd4de5ff MM |
1203 | /* The counts are equal. So, this might be a |
1204 | specialization, but it is not a specialization of a | |
1205 | member template. It might be something like | |
1206 | ||
1207 | template <class T> struct S { | |
1208 | void f(int i); | |
1209 | }; | |
1210 | template <> | |
1211 | void S<int>::f(int i) {} */ | |
1212 | specialization = 1; | |
1213 | SET_DECL_TEMPLATE_SPECIALIZATION (decl); | |
75650646 | 1214 | } |
fd4de5ff | 1215 | else |
386b8a85 | 1216 | { |
fd4de5ff MM |
1217 | /* This cannot be an explicit specialization. There are not |
1218 | enough headers for all of the qualifying classes. For | |
1219 | example, we might have: | |
1220 | ||
1221 | template <> | |
1222 | void S<int>::T<char>::f(); | |
75650646 | 1223 | |
fd4de5ff MM |
1224 | But, we're missing another template <>. */ |
1225 | cp_error("too few template parameter lists in declaration of `%D'", decl); | |
1226 | return decl; | |
1227 | } | |
1228 | } | |
1229 | else if (processing_explicit_instantiation) | |
1230 | { | |
1231 | if (template_header_count) | |
1232 | cp_error ("template parameter list used in explicit instantiation"); | |
1233 | ||
1234 | if (have_def) | |
1235 | cp_error ("definition provided for explicit instantiation"); | |
75650646 | 1236 | |
fd4de5ff MM |
1237 | explicit_instantiation = 1; |
1238 | } | |
1239 | else if (ctype != NULL_TREE | |
1240 | && !TYPE_BEING_DEFINED (ctype) | |
1241 | && CLASSTYPE_TEMPLATE_INSTANTIATION (ctype) | |
1242 | && !is_friend) | |
1243 | { | |
1244 | /* This case catches outdated code that looks like this: | |
1245 | ||
1246 | template <class T> struct S { void f(); }; | |
1247 | void S<int>::f() {} // Missing template <> | |
1248 | ||
1249 | We disable this check when the type is being defined to | |
1250 | avoid complaining about default compiler-generated | |
1251 | constructors, destructors, and assignment operators. | |
1252 | Since the type is an instantiation, not a specialization, | |
1253 | these are the only functions that can be defined before | |
1254 | the class is complete. */ | |
75650646 | 1255 | |
c6f2ed0d JM |
1256 | /* If they said |
1257 | template <class T> void S<int>::f() {} | |
1258 | that's bogus. */ | |
fd4de5ff MM |
1259 | if (template_header_count) |
1260 | { | |
1261 | cp_error ("template parameters specified in specialization"); | |
1262 | return decl; | |
c6f2ed0d | 1263 | } |
fd4de5ff MM |
1264 | |
1265 | if (pedantic) | |
1266 | cp_pedwarn | |
1267 | ("explicit specialization not preceded by `template <>'"); | |
1268 | specialization = 1; | |
1269 | SET_DECL_TEMPLATE_SPECIALIZATION (decl); | |
1270 | } | |
1271 | else if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR) | |
1272 | { | |
1273 | if (is_friend) | |
1274 | /* This could be something like: | |
1275 | ||
1276 | template <class T> void f(T); | |
1277 | class S { friend void f<>(int); } */ | |
1278 | specialization = 1; | |
1279 | else | |
c6f2ed0d | 1280 | { |
fd4de5ff MM |
1281 | /* This case handles bogus declarations like template <> |
1282 | template <class T> void f<int>(); */ | |
75650646 | 1283 | |
fd4de5ff MM |
1284 | cp_error ("template-id `%D' in declaration of primary template", |
1285 | declarator); | |
1286 | return decl; | |
386b8a85 | 1287 | } |
75650646 | 1288 | } |
386b8a85 | 1289 | |
670960ac JM |
1290 | if (specialization || member_specialization) |
1291 | { | |
1292 | tree t = TYPE_ARG_TYPES (TREE_TYPE (decl)); | |
1293 | for (; t; t = TREE_CHAIN (t)) | |
1294 | if (TREE_PURPOSE (t)) | |
1295 | { | |
8251199e JM |
1296 | cp_pedwarn |
1297 | ("default argument specified in explicit specialization"); | |
670960ac JM |
1298 | break; |
1299 | } | |
f3400fe2 JM |
1300 | if (current_lang_name == lang_name_c) |
1301 | cp_error ("template specialization with C linkage"); | |
670960ac JM |
1302 | } |
1303 | ||
e1467ff2 | 1304 | if (specialization || member_specialization || explicit_instantiation) |
75650646 MM |
1305 | { |
1306 | tree tmpl = NULL_TREE; | |
1307 | tree targs = NULL_TREE; | |
75650646 MM |
1308 | |
1309 | /* Make sure that the declarator is a TEMPLATE_ID_EXPR. */ | |
386b8a85 JM |
1310 | if (TREE_CODE (declarator) != TEMPLATE_ID_EXPR) |
1311 | { | |
1312 | tree fns; | |
1313 | ||
1314 | my_friendly_assert (TREE_CODE (declarator) == IDENTIFIER_NODE, | |
1315 | 0); | |
1316 | if (!ctype) | |
30394414 | 1317 | fns = IDENTIFIER_NAMESPACE_VALUE (dname); |
386b8a85 JM |
1318 | else |
1319 | fns = dname; | |
1320 | ||
75650646 MM |
1321 | declarator = |
1322 | lookup_template_function (fns, NULL_TREE); | |
386b8a85 JM |
1323 | } |
1324 | ||
f2e48b67 BK |
1325 | if (declarator == error_mark_node) |
1326 | return error_mark_node; | |
1327 | ||
75650646 MM |
1328 | if (ctype != NULL_TREE && TYPE_BEING_DEFINED (ctype)) |
1329 | { | |
8ec2ac34 | 1330 | if (!explicit_instantiation) |
6c30752f MM |
1331 | /* A specialization in class scope. This is illegal, |
1332 | but the error will already have been flagged by | |
1333 | check_specialization_scope. */ | |
1334 | return error_mark_node; | |
8ec2ac34 | 1335 | else |
b370501f KG |
1336 | { |
1337 | /* It's not legal to write an explicit instantiation in | |
1338 | class scope, e.g.: | |
8ec2ac34 | 1339 | |
b370501f | 1340 | class C { template void f(); } |
8ec2ac34 | 1341 | |
b370501f KG |
1342 | This case is caught by the parser. However, on |
1343 | something like: | |
8ec2ac34 | 1344 | |
b370501f | 1345 | template class C { void f(); }; |
8ec2ac34 | 1346 | |
b370501f KG |
1347 | (which is illegal) we can get here. The error will be |
1348 | issued later. */ | |
1349 | ; | |
1350 | } | |
8ec2ac34 | 1351 | |
e1467ff2 | 1352 | return decl; |
75650646 | 1353 | } |
8f032717 MM |
1354 | else if (TREE_CODE (TREE_OPERAND (declarator, 0)) == LOOKUP_EXPR) |
1355 | { | |
1356 | /* A friend declaration. We can't do much, because we don't | |
1357 | know what this resolves to, yet. */ | |
1358 | my_friendly_assert (is_friend != 0, 0); | |
1359 | my_friendly_assert (!explicit_instantiation, 0); | |
1360 | SET_DECL_IMPLICIT_INSTANTIATION (decl); | |
1361 | return decl; | |
1362 | } | |
75650646 MM |
1363 | else if (ctype != NULL_TREE |
1364 | && (TREE_CODE (TREE_OPERAND (declarator, 0)) == | |
1365 | IDENTIFIER_NODE)) | |
386b8a85 | 1366 | { |
75650646 MM |
1367 | /* Find the list of functions in ctype that have the same |
1368 | name as the declared function. */ | |
1369 | tree name = TREE_OPERAND (declarator, 0); | |
03017874 MM |
1370 | tree fns = NULL_TREE; |
1371 | int idx; | |
1372 | ||
75650646 MM |
1373 | if (name == constructor_name (ctype) |
1374 | || name == constructor_name_full (ctype)) | |
386b8a85 | 1375 | { |
75650646 MM |
1376 | int is_constructor = DECL_CONSTRUCTOR_P (decl); |
1377 | ||
1378 | if (is_constructor ? !TYPE_HAS_CONSTRUCTOR (ctype) | |
1379 | : !TYPE_HAS_DESTRUCTOR (ctype)) | |
1380 | { | |
1381 | /* From [temp.expl.spec]: | |
e1467ff2 | 1382 | |
75650646 MM |
1383 | If such an explicit specialization for the member |
1384 | of a class template names an implicitly-declared | |
1385 | special member function (clause _special_), the | |
e1467ff2 MM |
1386 | program is ill-formed. |
1387 | ||
1388 | Similar language is found in [temp.explicit]. */ | |
8251199e | 1389 | cp_error ("specialization of implicitly-declared special member function"); |
03017874 | 1390 | return error_mark_node; |
75650646 | 1391 | } |
386b8a85 | 1392 | |
42da2fd8 | 1393 | name = is_constructor ? ctor_identifier : dtor_identifier; |
75650646 | 1394 | } |
42da2fd8 | 1395 | |
03017874 MM |
1396 | if (!IDENTIFIER_TYPENAME_P (name)) |
1397 | { | |
1398 | idx = lookup_fnfields_1 (ctype, name); | |
1399 | if (idx >= 0) | |
1400 | fns = TREE_VEC_ELT (CLASSTYPE_METHOD_VEC (ctype), idx); | |
1401 | } | |
1402 | else | |
1403 | { | |
1404 | tree methods; | |
1405 | ||
1406 | /* For a type-conversion operator, we cannot do a | |
1407 | name-based lookup. We might be looking for `operator | |
1408 | int' which will be a specialization of `operator T'. | |
1409 | So, we find *all* the conversion operators, and then | |
1410 | select from them. */ | |
1411 | fns = NULL_TREE; | |
1412 | ||
1413 | methods = CLASSTYPE_METHOD_VEC (ctype); | |
1414 | if (methods) | |
1415 | for (idx = 2; idx < TREE_VEC_LENGTH (methods); ++idx) | |
1416 | { | |
1417 | tree ovl = TREE_VEC_ELT (methods, idx); | |
1418 | ||
1419 | if (!ovl || !DECL_CONV_FN_P (OVL_CURRENT (ovl))) | |
1420 | /* There are no more conversion functions. */ | |
1421 | break; | |
1422 | ||
1423 | /* Glue all these conversion functions together | |
1424 | with those we already have. */ | |
1425 | for (; ovl; ovl = OVL_NEXT (ovl)) | |
1426 | fns = ovl_cons (OVL_CURRENT (ovl), fns); | |
1427 | } | |
1428 | } | |
1429 | ||
386b8a85 JM |
1430 | if (fns == NULL_TREE) |
1431 | { | |
b3f738da MM |
1432 | cp_error ("no member function `%D' declared in `%T'", |
1433 | name, ctype); | |
03017874 | 1434 | return error_mark_node; |
386b8a85 JM |
1435 | } |
1436 | else | |
1437 | TREE_OPERAND (declarator, 0) = fns; | |
1438 | } | |
75650646 | 1439 | |
e1467ff2 MM |
1440 | /* Figure out what exactly is being specialized at this point. |
1441 | Note that for an explicit instantiation, even one for a | |
38e01259 | 1442 | member function, we cannot tell apriori whether the |
e1467ff2 | 1443 | instantiation is for a member template, or just a member |
36a117a5 MM |
1444 | function of a template class. Even if a member template is |
1445 | being instantiated, the member template arguments may be | |
1446 | elided if they can be deduced from the rest of the | |
1447 | declaration. */ | |
e1467ff2 MM |
1448 | tmpl = determine_specialization (declarator, decl, |
1449 | &targs, | |
bf8f3f93 | 1450 | member_specialization); |
386b8a85 | 1451 | |
03017874 MM |
1452 | if (!tmpl || tmpl == error_mark_node) |
1453 | /* We couldn't figure out what this declaration was | |
1454 | specializing. */ | |
1455 | return error_mark_node; | |
1456 | else | |
386b8a85 | 1457 | { |
25aab5d0 | 1458 | tree gen_tmpl = most_general_template (tmpl); |
36a117a5 | 1459 | |
e1467ff2 MM |
1460 | if (explicit_instantiation) |
1461 | { | |
03d0f4af | 1462 | /* We don't set DECL_EXPLICIT_INSTANTIATION here; that |
25aab5d0 MM |
1463 | is done by do_decl_instantiation later. */ |
1464 | ||
1465 | int arg_depth = TMPL_ARGS_DEPTH (targs); | |
1466 | int parm_depth = TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (tmpl)); | |
1467 | ||
1468 | if (arg_depth > parm_depth) | |
1469 | { | |
1470 | /* If TMPL is not the most general template (for | |
1471 | example, if TMPL is a friend template that is | |
1472 | injected into namespace scope), then there will | |
1473 | be too many levels fo TARGS. Remove some of them | |
1474 | here. */ | |
1475 | int i; | |
1476 | tree new_targs; | |
1477 | ||
1478 | new_targs = make_temp_vec (parm_depth); | |
1479 | for (i = arg_depth - parm_depth; i < arg_depth; ++i) | |
1480 | TREE_VEC_ELT (new_targs, i - (arg_depth - parm_depth)) | |
1481 | = TREE_VEC_ELT (targs, i); | |
1482 | targs = new_targs; | |
1483 | } | |
1484 | ||
1485 | decl = instantiate_template (tmpl, targs); | |
e1467ff2 MM |
1486 | return decl; |
1487 | } | |
36a117a5 MM |
1488 | |
1489 | /* If we though that the DECL was a member function, but it | |
1490 | turns out to be specializing a static member function, | |
1491 | make DECL a static member function as well. */ | |
1492 | if (DECL_STATIC_FUNCTION_P (tmpl) | |
1493 | && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)) | |
366c0f1e MM |
1494 | { |
1495 | revert_static_member_fn (&decl, 0, 0); | |
1496 | last_function_parms = TREE_CHAIN (last_function_parms); | |
1497 | } | |
e1467ff2 | 1498 | |
36a117a5 MM |
1499 | /* Set up the DECL_TEMPLATE_INFO for DECL. */ |
1500 | DECL_TEMPLATE_INFO (decl) | |
1501 | = perm_tree_cons (tmpl, targs, NULL_TREE); | |
1502 | ||
e1467ff2 MM |
1503 | /* Mangle the function name appropriately. Note that we do |
1504 | not mangle specializations of non-template member | |
1505 | functions of template classes, e.g. with | |
36a117a5 | 1506 | |
e1467ff2 | 1507 | template <class T> struct S { void f(); } |
36a117a5 | 1508 | |
e1467ff2 | 1509 | and given the specialization |
36a117a5 | 1510 | |
e1467ff2 | 1511 | template <> void S<int>::f() {} |
36a117a5 | 1512 | |
e1467ff2 MM |
1513 | we do not mangle S<int>::f() here. That's because it's |
1514 | just an ordinary member function and doesn't need special | |
36a117a5 MM |
1515 | treatment. We do this here so that the ordinary, |
1516 | non-template, name-mangling algorith will not be used | |
1517 | later. */ | |
e1467ff2 | 1518 | if ((is_member_template (tmpl) || ctype == NULL_TREE) |
75650646 | 1519 | && name_mangling_version >= 1) |
36a117a5 | 1520 | set_mangled_name_for_template_decl (decl); |
386b8a85 JM |
1521 | |
1522 | if (is_friend && !have_def) | |
36a117a5 MM |
1523 | /* This is not really a declaration of a specialization. |
1524 | It's just the name of an instantiation. But, it's not | |
1525 | a request for an instantiation, either. */ | |
fbf1c34b | 1526 | SET_DECL_IMPLICIT_INSTANTIATION (decl); |
75650646 | 1527 | |
36a117a5 MM |
1528 | /* Register this specialization so that we can find it |
1529 | again. */ | |
1530 | decl = register_specialization (decl, gen_tmpl, targs); | |
386b8a85 JM |
1531 | } |
1532 | } | |
75650646 | 1533 | |
e1467ff2 | 1534 | return decl; |
386b8a85 | 1535 | } |
75650646 | 1536 | |
39c01e4c MM |
1537 | /* TYPE is being declared. Verify that the use of template headers |
1538 | and such is reasonable. Issue error messages if not. */ | |
1539 | ||
1540 | void | |
1541 | maybe_check_template_type (type) | |
1542 | tree type; | |
1543 | { | |
1544 | if (template_header_count) | |
1545 | { | |
1546 | /* We are in the scope of some `template <...>' header. */ | |
1547 | ||
1548 | int context_depth | |
1549 | = template_class_depth_real (TYPE_CONTEXT (type), | |
1550 | /*count_specializations=*/1); | |
1551 | ||
1552 | if (template_header_count <= context_depth) | |
1553 | /* This is OK; the template headers are for the context. We | |
1554 | are actually too lenient here; like | |
1555 | check_explicit_specialization we should consider the number | |
1556 | of template types included in the actual declaration. For | |
1557 | example, | |
1558 | ||
1559 | template <class T> struct S { | |
1560 | template <class U> template <class V> | |
1561 | struct I {}; | |
1562 | }; | |
1563 | ||
1564 | is illegal, but: | |
1565 | ||
1566 | template <class T> struct S { | |
1567 | template <class U> struct I; | |
1568 | }; | |
1569 | ||
1570 | template <class T> template <class U. | |
1571 | struct S<T>::I {}; | |
1572 | ||
1573 | is not. */ | |
1574 | ; | |
1575 | else if (template_header_count > context_depth + 1) | |
1576 | /* There are two many template parameter lists. */ | |
8251199e | 1577 | cp_error ("too many template parameter lists in declaration of `%T'", type); |
39c01e4c MM |
1578 | } |
1579 | } | |
1580 | ||
75650646 MM |
1581 | /* Returns 1 iff PARMS1 and PARMS2 are identical sets of template |
1582 | parameters. These are represented in the same format used for | |
1583 | DECL_TEMPLATE_PARMS. */ | |
1584 | ||
1585 | int comp_template_parms (parms1, parms2) | |
1586 | tree parms1; | |
1587 | tree parms2; | |
1588 | { | |
1589 | tree p1; | |
1590 | tree p2; | |
1591 | ||
1592 | if (parms1 == parms2) | |
1593 | return 1; | |
1594 | ||
1595 | for (p1 = parms1, p2 = parms2; | |
1596 | p1 != NULL_TREE && p2 != NULL_TREE; | |
1597 | p1 = TREE_CHAIN (p1), p2 = TREE_CHAIN (p2)) | |
1598 | { | |
1599 | tree t1 = TREE_VALUE (p1); | |
1600 | tree t2 = TREE_VALUE (p2); | |
1601 | int i; | |
1602 | ||
1603 | my_friendly_assert (TREE_CODE (t1) == TREE_VEC, 0); | |
1604 | my_friendly_assert (TREE_CODE (t2) == TREE_VEC, 0); | |
1605 | ||
1606 | if (TREE_VEC_LENGTH (t1) != TREE_VEC_LENGTH (t2)) | |
1607 | return 0; | |
1608 | ||
1609 | for (i = 0; i < TREE_VEC_LENGTH (t2); ++i) | |
1610 | { | |
1611 | tree parm1 = TREE_VALUE (TREE_VEC_ELT (t1, i)); | |
1612 | tree parm2 = TREE_VALUE (TREE_VEC_ELT (t2, i)); | |
1613 | ||
1614 | if (TREE_CODE (parm1) != TREE_CODE (parm2)) | |
1615 | return 0; | |
1616 | ||
1617 | if (TREE_CODE (parm1) == TEMPLATE_TYPE_PARM) | |
1618 | continue; | |
3bfdc719 | 1619 | else if (!same_type_p (TREE_TYPE (parm1), TREE_TYPE (parm2))) |
75650646 MM |
1620 | return 0; |
1621 | } | |
1622 | } | |
1623 | ||
1624 | if ((p1 != NULL_TREE) != (p2 != NULL_TREE)) | |
1625 | /* One set of parameters has more parameters lists than the | |
1626 | other. */ | |
1627 | return 0; | |
1628 | ||
1629 | return 1; | |
1630 | } | |
1631 | ||
f3400fe2 JM |
1632 | /* Complain if DECL shadows a template parameter. |
1633 | ||
1634 | [temp.local]: A template-parameter shall not be redeclared within its | |
1635 | scope (including nested scopes). */ | |
1636 | ||
1637 | void | |
1638 | check_template_shadow (decl) | |
1639 | tree decl; | |
1640 | { | |
8f032717 MM |
1641 | tree olddecl; |
1642 | ||
b5d9b9ab MM |
1643 | /* If we're not in a template, we can't possibly shadow a template |
1644 | parameter. */ | |
1645 | if (!current_template_parms) | |
1646 | return; | |
1647 | ||
1648 | /* Figure out what we're shadowing. */ | |
8f032717 MM |
1649 | if (TREE_CODE (decl) == OVERLOAD) |
1650 | decl = OVL_CURRENT (decl); | |
1651 | olddecl = IDENTIFIER_VALUE (DECL_NAME (decl)); | |
f3400fe2 | 1652 | |
b5d9b9ab MM |
1653 | /* If there's no previous binding for this name, we're not shadowing |
1654 | anything, let alone a template parameter. */ | |
1655 | if (!olddecl) | |
1656 | return; | |
1657 | ||
1658 | /* If we're not shadowing a template parameter, we're done. Note | |
1659 | that OLDDECL might be an OVERLOAD (or perhaps even an | |
1660 | ERROR_MARK), so we can't just blithely assume it to be a _DECL | |
1661 | node. */ | |
1662 | if (TREE_CODE_CLASS (TREE_CODE (olddecl)) != 'd' | |
1663 | || !DECL_TEMPLATE_PARM_P (olddecl)) | |
1664 | return; | |
1665 | ||
1666 | /* We check for decl != olddecl to avoid bogus errors for using a | |
1667 | name inside a class. We check TPFI to avoid duplicate errors for | |
1668 | inline member templates. */ | |
1669 | if (decl == olddecl | |
1670 | || TEMPLATE_PARMS_FOR_INLINE (current_template_parms)) | |
1671 | return; | |
1672 | ||
1673 | cp_error_at ("declaration of `%#D'", decl); | |
1674 | cp_error_at (" shadows template parm `%#D'", olddecl); | |
f3400fe2 | 1675 | } |
22a7be53 | 1676 | |
f3400fe2 | 1677 | /* Return a new TEMPLATE_PARM_INDEX with the indicated INDEX, LEVEL, |
f84b4be9 JM |
1678 | ORIG_LEVEL, DECL, and TYPE. */ |
1679 | ||
1680 | static tree | |
1681 | build_template_parm_index (index, level, orig_level, decl, type) | |
1682 | int index; | |
1683 | int level; | |
1684 | int orig_level; | |
1685 | tree decl; | |
1686 | tree type; | |
1687 | { | |
1688 | tree t = make_node (TEMPLATE_PARM_INDEX); | |
1689 | TEMPLATE_PARM_IDX (t) = index; | |
1690 | TEMPLATE_PARM_LEVEL (t) = level; | |
1691 | TEMPLATE_PARM_ORIG_LEVEL (t) = orig_level; | |
1692 | TEMPLATE_PARM_DECL (t) = decl; | |
1693 | TREE_TYPE (t) = type; | |
1694 | ||
1695 | return t; | |
1696 | } | |
1697 | ||
f84b4be9 | 1698 | /* Return a TEMPLATE_PARM_INDEX, similar to INDEX, but whose |
93cdc044 | 1699 | TEMPLATE_PARM_LEVEL has been decreased by LEVELS. If such a |
f84b4be9 JM |
1700 | TEMPLATE_PARM_INDEX already exists, it is returned; otherwise, a |
1701 | new one is created. */ | |
1702 | ||
1703 | static tree | |
93cdc044 | 1704 | reduce_template_parm_level (index, type, levels) |
f84b4be9 JM |
1705 | tree index; |
1706 | tree type; | |
93cdc044 | 1707 | int levels; |
f84b4be9 JM |
1708 | { |
1709 | if (TEMPLATE_PARM_DESCENDANTS (index) == NULL_TREE | |
1710 | || (TEMPLATE_PARM_LEVEL (TEMPLATE_PARM_DESCENDANTS (index)) | |
93cdc044 | 1711 | != TEMPLATE_PARM_LEVEL (index) - levels)) |
f84b4be9 JM |
1712 | { |
1713 | tree decl | |
1714 | = build_decl (TREE_CODE (TEMPLATE_PARM_DECL (index)), | |
1715 | DECL_NAME (TEMPLATE_PARM_DECL (index)), | |
1716 | type); | |
1717 | tree t | |
1718 | = build_template_parm_index (TEMPLATE_PARM_IDX (index), | |
93cdc044 | 1719 | TEMPLATE_PARM_LEVEL (index) - levels, |
f84b4be9 JM |
1720 | TEMPLATE_PARM_ORIG_LEVEL (index), |
1721 | decl, type); | |
1722 | TEMPLATE_PARM_DESCENDANTS (index) = t; | |
cae40af6 JM |
1723 | |
1724 | /* Template template parameters need this. */ | |
1725 | DECL_TEMPLATE_PARMS (decl) | |
1726 | = DECL_TEMPLATE_PARMS (TEMPLATE_PARM_DECL (index)); | |
f84b4be9 JM |
1727 | } |
1728 | ||
1729 | return TEMPLATE_PARM_DESCENDANTS (index); | |
1730 | } | |
1731 | ||
8d08fdba | 1732 | /* Process information from new template parameter NEXT and append it to the |
5566b478 | 1733 | LIST being built. */ |
e92cc029 | 1734 | |
8d08fdba MS |
1735 | tree |
1736 | process_template_parm (list, next) | |
1737 | tree list, next; | |
1738 | { | |
1739 | tree parm; | |
1740 | tree decl = 0; | |
a292b002 | 1741 | tree defval; |
5566b478 | 1742 | int is_type, idx; |
f84b4be9 | 1743 | |
8d08fdba MS |
1744 | parm = next; |
1745 | my_friendly_assert (TREE_CODE (parm) == TREE_LIST, 259); | |
a292b002 MS |
1746 | defval = TREE_PURPOSE (parm); |
1747 | parm = TREE_VALUE (parm); | |
1748 | is_type = TREE_PURPOSE (parm) == class_type_node; | |
5566b478 MS |
1749 | |
1750 | if (list) | |
1751 | { | |
1752 | tree p = TREE_VALUE (tree_last (list)); | |
1753 | ||
1754 | if (TREE_CODE (p) == TYPE_DECL) | |
1755 | idx = TEMPLATE_TYPE_IDX (TREE_TYPE (p)); | |
73b0fce8 KL |
1756 | else if (TREE_CODE (p) == TEMPLATE_DECL) |
1757 | idx = TEMPLATE_TYPE_IDX (TREE_TYPE (DECL_TEMPLATE_RESULT (p))); | |
5566b478 | 1758 | else |
f84b4be9 | 1759 | idx = TEMPLATE_PARM_IDX (DECL_INITIAL (p)); |
5566b478 MS |
1760 | ++idx; |
1761 | } | |
1762 | else | |
1763 | idx = 0; | |
1764 | ||
8d08fdba MS |
1765 | if (!is_type) |
1766 | { | |
a292b002 | 1767 | my_friendly_assert (TREE_CODE (TREE_PURPOSE (parm)) == TREE_LIST, 260); |
8d08fdba | 1768 | /* is a const-param */ |
a292b002 | 1769 | parm = grokdeclarator (TREE_VALUE (parm), TREE_PURPOSE (parm), |
c11b6f21 | 1770 | PARM, 0, NULL_TREE); |
d490621d MM |
1771 | |
1772 | /* [temp.param] | |
1773 | ||
1774 | The top-level cv-qualifiers on the template-parameter are | |
1775 | ignored when determining its type. */ | |
1776 | TREE_TYPE (parm) = TYPE_MAIN_VARIANT (TREE_TYPE (parm)); | |
1777 | ||
8d08fdba MS |
1778 | /* A template parameter is not modifiable. */ |
1779 | TREE_READONLY (parm) = 1; | |
c91a56d2 | 1780 | if (IS_AGGR_TYPE (TREE_TYPE (parm)) |
410c2fba KL |
1781 | && TREE_CODE (TREE_TYPE (parm)) != TEMPLATE_TYPE_PARM |
1782 | && TREE_CODE (TREE_TYPE (parm)) != TYPENAME_TYPE) | |
8d08fdba | 1783 | { |
8251199e | 1784 | cp_error ("`%#T' is not a valid type for a template constant parameter", |
c91a56d2 MS |
1785 | TREE_TYPE (parm)); |
1786 | if (DECL_NAME (parm) == NULL_TREE) | |
8251199e | 1787 | error (" a template type parameter must begin with `class' or `typename'"); |
8d08fdba MS |
1788 | TREE_TYPE (parm) = void_type_node; |
1789 | } | |
37c46b43 MS |
1790 | else if (pedantic |
1791 | && (TREE_CODE (TREE_TYPE (parm)) == REAL_TYPE | |
1792 | || TREE_CODE (TREE_TYPE (parm)) == COMPLEX_TYPE)) | |
8251199e | 1793 | cp_pedwarn ("`%T' is not a valid type for a template constant parameter", |
eb66be0e | 1794 | TREE_TYPE (parm)); |
8d08fdba MS |
1795 | if (TREE_PERMANENT (parm) == 0) |
1796 | { | |
1797 | parm = copy_node (parm); | |
1798 | TREE_PERMANENT (parm) = 1; | |
1799 | } | |
8d08fdba | 1800 | decl = build_decl (CONST_DECL, DECL_NAME (parm), TREE_TYPE (parm)); |
f84b4be9 JM |
1801 | DECL_INITIAL (parm) = DECL_INITIAL (decl) |
1802 | = build_template_parm_index (idx, processing_template_decl, | |
1803 | processing_template_decl, | |
1804 | decl, TREE_TYPE (parm)); | |
8d08fdba MS |
1805 | } |
1806 | else | |
1807 | { | |
73b0fce8 KL |
1808 | tree t; |
1809 | parm = TREE_VALUE (parm); | |
1810 | ||
1811 | if (parm && TREE_CODE (parm) == TEMPLATE_DECL) | |
1812 | { | |
1813 | t = make_lang_type (TEMPLATE_TEMPLATE_PARM); | |
1814 | /* This is for distinguishing between real templates and template | |
1815 | template parameters */ | |
1816 | TREE_TYPE (parm) = t; | |
1817 | TREE_TYPE (DECL_TEMPLATE_RESULT (parm)) = t; | |
1818 | decl = parm; | |
1819 | } | |
1820 | else | |
1821 | { | |
1822 | t = make_lang_type (TEMPLATE_TYPE_PARM); | |
1823 | /* parm is either IDENTIFIER_NODE or NULL_TREE */ | |
1824 | decl = build_decl (TYPE_DECL, parm, t); | |
1825 | } | |
1826 | ||
d2e5ee5c MS |
1827 | TYPE_NAME (t) = decl; |
1828 | TYPE_STUB_DECL (t) = decl; | |
a292b002 | 1829 | parm = decl; |
f84b4be9 JM |
1830 | TEMPLATE_TYPE_PARM_INDEX (t) |
1831 | = build_template_parm_index (idx, processing_template_decl, | |
1832 | processing_template_decl, | |
1833 | decl, TREE_TYPE (parm)); | |
8d08fdba | 1834 | } |
8ccc31eb | 1835 | SET_DECL_ARTIFICIAL (decl); |
fc03edb3 | 1836 | DECL_TEMPLATE_PARM_P (decl) = 1; |
8d08fdba | 1837 | pushdecl (decl); |
a292b002 | 1838 | parm = build_tree_list (defval, parm); |
8d08fdba MS |
1839 | return chainon (list, parm); |
1840 | } | |
1841 | ||
1842 | /* The end of a template parameter list has been reached. Process the | |
1843 | tree list into a parameter vector, converting each parameter into a more | |
1844 | useful form. Type parameters are saved as IDENTIFIER_NODEs, and others | |
1845 | as PARM_DECLs. */ | |
1846 | ||
1847 | tree | |
1848 | end_template_parm_list (parms) | |
1849 | tree parms; | |
1850 | { | |
5566b478 | 1851 | int nparms; |
8d08fdba | 1852 | tree parm; |
5566b478 MS |
1853 | tree saved_parmlist = make_tree_vec (list_length (parms)); |
1854 | ||
5566b478 MS |
1855 | current_template_parms |
1856 | = tree_cons (build_int_2 (0, processing_template_decl), | |
1857 | saved_parmlist, current_template_parms); | |
8d08fdba MS |
1858 | |
1859 | for (parm = parms, nparms = 0; parm; parm = TREE_CHAIN (parm), nparms++) | |
5566b478 | 1860 | TREE_VEC_ELT (saved_parmlist, nparms) = parm; |
a292b002 | 1861 | |
67ffc812 MM |
1862 | --processing_template_parmlist; |
1863 | ||
8d08fdba MS |
1864 | return saved_parmlist; |
1865 | } | |
1866 | ||
5566b478 MS |
1867 | /* end_template_decl is called after a template declaration is seen. */ |
1868 | ||
8d08fdba | 1869 | void |
5566b478 | 1870 | end_template_decl () |
8d08fdba | 1871 | { |
386b8a85 JM |
1872 | reset_specialization (); |
1873 | ||
5156628f | 1874 | if (! processing_template_decl) |
73aad9b9 JM |
1875 | return; |
1876 | ||
5566b478 MS |
1877 | /* This matches the pushlevel in begin_template_parm_list. */ |
1878 | poplevel (0, 0, 0); | |
8d08fdba | 1879 | |
5566b478 MS |
1880 | --processing_template_decl; |
1881 | current_template_parms = TREE_CHAIN (current_template_parms); | |
1882 | (void) get_pending_sizes (); /* Why? */ | |
1883 | } | |
8d08fdba | 1884 | |
36a117a5 MM |
1885 | /* Given a template argument vector containing the template PARMS. |
1886 | The innermost PARMS are given first. */ | |
9a3b49ac MS |
1887 | |
1888 | tree | |
1889 | current_template_args () | |
5566b478 | 1890 | { |
36a117a5 | 1891 | tree header; |
b370501f | 1892 | tree args = NULL_TREE; |
36a117a5 | 1893 | int length = TMPL_PARMS_DEPTH (current_template_parms); |
98c1c668 JM |
1894 | int l = length; |
1895 | ||
36a117a5 MM |
1896 | /* If there is only one level of template parameters, we do not |
1897 | create a TREE_VEC of TREE_VECs. Instead, we return a single | |
1898 | TREE_VEC containing the arguments. */ | |
1899 | if (length > 1) | |
1900 | args = make_tree_vec (length); | |
1901 | ||
1902 | for (header = current_template_parms; header; header = TREE_CHAIN (header)) | |
8d08fdba | 1903 | { |
5566b478 | 1904 | tree a = copy_node (TREE_VALUE (header)); |
36a117a5 MM |
1905 | int i; |
1906 | ||
5566b478 | 1907 | TREE_TYPE (a) = NULL_TREE; |
36a117a5 | 1908 | for (i = TREE_VEC_LENGTH (a) - 1; i >= 0; --i) |
5566b478 | 1909 | { |
98c1c668 JM |
1910 | tree t = TREE_VEC_ELT (a, i); |
1911 | ||
36a117a5 | 1912 | /* T will be a list if we are called from within a |
98c1c668 JM |
1913 | begin/end_template_parm_list pair, but a vector directly |
1914 | if within a begin/end_member_template_processing pair. */ | |
1915 | if (TREE_CODE (t) == TREE_LIST) | |
1916 | { | |
1917 | t = TREE_VALUE (t); | |
1918 | ||
73b0fce8 KL |
1919 | if (TREE_CODE (t) == TYPE_DECL |
1920 | || TREE_CODE (t) == TEMPLATE_DECL) | |
98c1c668 JM |
1921 | t = TREE_TYPE (t); |
1922 | else | |
1923 | t = DECL_INITIAL (t); | |
36a117a5 | 1924 | TREE_VEC_ELT (a, i) = t; |
98c1c668 | 1925 | } |
5566b478 | 1926 | } |
36a117a5 MM |
1927 | |
1928 | if (length > 1) | |
1929 | TREE_VEC_ELT (args, --l) = a; | |
1930 | else | |
1931 | args = a; | |
8d08fdba MS |
1932 | } |
1933 | ||
9a3b49ac MS |
1934 | return args; |
1935 | } | |
75650646 | 1936 | |
e1467ff2 MM |
1937 | /* Return a TEMPLATE_DECL corresponding to DECL, using the indicated |
1938 | template PARMS. Used by push_template_decl below. */ | |
1939 | ||
75650646 MM |
1940 | static tree |
1941 | build_template_decl (decl, parms) | |
1942 | tree decl; | |
1943 | tree parms; | |
1944 | { | |
1945 | tree tmpl = build_lang_decl (TEMPLATE_DECL, DECL_NAME (decl), NULL_TREE); | |
1946 | DECL_TEMPLATE_PARMS (tmpl) = parms; | |
1947 | DECL_CONTEXT (tmpl) = DECL_CONTEXT (decl); | |
1948 | if (DECL_LANG_SPECIFIC (decl)) | |
1949 | { | |
1950 | DECL_CLASS_CONTEXT (tmpl) = DECL_CLASS_CONTEXT (decl); | |
8f032717 MM |
1951 | DECL_STATIC_FUNCTION_P (tmpl) = DECL_STATIC_FUNCTION_P (decl); |
1952 | DECL_CONSTRUCTOR_P (tmpl) = DECL_CONSTRUCTOR_P (decl); | |
11f98788 | 1953 | DECL_NONCONVERTING_P (tmpl) = DECL_NONCONVERTING_P (decl); |
75650646 MM |
1954 | } |
1955 | ||
1956 | return tmpl; | |
1957 | } | |
1958 | ||
050367a3 MM |
1959 | struct template_parm_data |
1960 | { | |
6c30752f MM |
1961 | /* The level of the template parameters we are currently |
1962 | processing. */ | |
050367a3 | 1963 | int level; |
6c30752f MM |
1964 | |
1965 | /* The index of the specialization argument we are currently | |
1966 | processing. */ | |
1967 | int current_arg; | |
1968 | ||
1969 | /* An array whose size is the number of template parameters. The | |
1970 | elements are non-zero if the parameter has been used in any one | |
1971 | of the arguments processed so far. */ | |
050367a3 | 1972 | int* parms; |
6c30752f MM |
1973 | |
1974 | /* An array whose size is the number of template arguments. The | |
1975 | elements are non-zero if the argument makes use of template | |
1976 | parameters of this level. */ | |
1977 | int* arg_uses_template_parms; | |
050367a3 MM |
1978 | }; |
1979 | ||
1980 | /* Subroutine of push_template_decl used to see if each template | |
1981 | parameter in a partial specialization is used in the explicit | |
1982 | argument list. If T is of the LEVEL given in DATA (which is | |
1983 | treated as a template_parm_data*), then DATA->PARMS is marked | |
1984 | appropriately. */ | |
1985 | ||
1986 | static int | |
1987 | mark_template_parm (t, data) | |
1988 | tree t; | |
1989 | void* data; | |
1990 | { | |
1991 | int level; | |
1992 | int idx; | |
1993 | struct template_parm_data* tpd = (struct template_parm_data*) data; | |
1994 | ||
1995 | if (TREE_CODE (t) == TEMPLATE_PARM_INDEX) | |
1996 | { | |
1997 | level = TEMPLATE_PARM_LEVEL (t); | |
1998 | idx = TEMPLATE_PARM_IDX (t); | |
1999 | } | |
2000 | else | |
2001 | { | |
2002 | level = TEMPLATE_TYPE_LEVEL (t); | |
2003 | idx = TEMPLATE_TYPE_IDX (t); | |
2004 | } | |
2005 | ||
2006 | if (level == tpd->level) | |
6c30752f MM |
2007 | { |
2008 | tpd->parms[idx] = 1; | |
2009 | tpd->arg_uses_template_parms[tpd->current_arg] = 1; | |
2010 | } | |
050367a3 MM |
2011 | |
2012 | /* Return zero so that for_each_template_parm will continue the | |
2013 | traversal of the tree; we want to mark *every* template parm. */ | |
2014 | return 0; | |
2015 | } | |
2016 | ||
6c30752f MM |
2017 | /* Process the partial specialization DECL. */ |
2018 | ||
e9659ab0 | 2019 | static tree |
6c30752f MM |
2020 | process_partial_specialization (decl) |
2021 | tree decl; | |
2022 | { | |
2023 | tree type = TREE_TYPE (decl); | |
2024 | tree maintmpl = CLASSTYPE_TI_TEMPLATE (type); | |
2025 | tree specargs = CLASSTYPE_TI_ARGS (type); | |
2026 | tree inner_args = innermost_args (specargs); | |
2027 | tree inner_parms = INNERMOST_TEMPLATE_PARMS (current_template_parms); | |
2028 | tree main_inner_parms = DECL_INNERMOST_TEMPLATE_PARMS (maintmpl); | |
2029 | int nargs = TREE_VEC_LENGTH (inner_args); | |
2030 | int ntparms = TREE_VEC_LENGTH (inner_parms); | |
2031 | int i; | |
2032 | int did_error_intro = 0; | |
6c30752f MM |
2033 | struct template_parm_data tpd; |
2034 | struct template_parm_data tpd2; | |
2035 | ||
6c30752f MM |
2036 | /* We check that each of the template parameters given in the |
2037 | partial specialization is used in the argument list to the | |
2038 | specialization. For example: | |
2039 | ||
2040 | template <class T> struct S; | |
2041 | template <class T> struct S<T*>; | |
2042 | ||
2043 | The second declaration is OK because `T*' uses the template | |
2044 | parameter T, whereas | |
2045 | ||
2046 | template <class T> struct S<int>; | |
2047 | ||
2048 | is no good. Even trickier is: | |
2049 | ||
2050 | template <class T> | |
2051 | struct S1 | |
2052 | { | |
2053 | template <class U> | |
2054 | struct S2; | |
2055 | template <class U> | |
2056 | struct S2<T>; | |
2057 | }; | |
2058 | ||
2059 | The S2<T> declaration is actually illegal; it is a | |
2060 | full-specialization. Of course, | |
2061 | ||
2062 | template <class U> | |
2063 | struct S2<T (*)(U)>; | |
2064 | ||
2065 | or some such would have been OK. */ | |
2066 | tpd.level = TMPL_PARMS_DEPTH (current_template_parms); | |
2067 | tpd.parms = alloca (sizeof (int) * ntparms); | |
1ddb2906 | 2068 | bzero ((PTR) tpd.parms, sizeof (int) * ntparms); |
6c30752f MM |
2069 | |
2070 | tpd.arg_uses_template_parms = alloca (sizeof (int) * nargs); | |
1ddb2906 | 2071 | bzero ((PTR) tpd.arg_uses_template_parms, sizeof (int) * nargs); |
6c30752f MM |
2072 | for (i = 0; i < nargs; ++i) |
2073 | { | |
2074 | tpd.current_arg = i; | |
2075 | for_each_template_parm (TREE_VEC_ELT (inner_args, i), | |
2076 | &mark_template_parm, | |
2077 | &tpd); | |
2078 | } | |
2079 | for (i = 0; i < ntparms; ++i) | |
2080 | if (tpd.parms[i] == 0) | |
2081 | { | |
2082 | /* One of the template parms was not used in the | |
2083 | specialization. */ | |
2084 | if (!did_error_intro) | |
2085 | { | |
8251199e | 2086 | cp_error ("template parameters not used in partial specialization:"); |
6c30752f MM |
2087 | did_error_intro = 1; |
2088 | } | |
2089 | ||
8251199e | 2090 | cp_error (" `%D'", |
6c30752f MM |
2091 | TREE_VALUE (TREE_VEC_ELT (inner_parms, i))); |
2092 | } | |
2093 | ||
2094 | /* [temp.class.spec] | |
2095 | ||
2096 | The argument list of the specialization shall not be identical to | |
2097 | the implicit argument list of the primary template. */ | |
2098 | if (comp_template_args (inner_args, | |
2099 | innermost_args (CLASSTYPE_TI_ARGS (TREE_TYPE | |
2100 | (maintmpl))))) | |
8251199e | 2101 | cp_error ("partial specialization `%T' does not specialize any template arguments", type); |
6c30752f MM |
2102 | |
2103 | /* [temp.class.spec] | |
2104 | ||
2105 | A partially specialized non-type argument expression shall not | |
2106 | involve template parameters of the partial specialization except | |
2107 | when the argument expression is a simple identifier. | |
2108 | ||
2109 | The type of a template parameter corresponding to a specialized | |
2110 | non-type argument shall not be dependent on a parameter of the | |
2111 | specialization. */ | |
2112 | my_friendly_assert (nargs == DECL_NTPARMS (maintmpl), 0); | |
2113 | tpd2.parms = 0; | |
2114 | for (i = 0; i < nargs; ++i) | |
2115 | { | |
2116 | tree arg = TREE_VEC_ELT (inner_args, i); | |
2117 | if (/* These first two lines are the `non-type' bit. */ | |
2118 | TREE_CODE_CLASS (TREE_CODE (arg)) != 't' | |
2119 | && TREE_CODE (arg) != TEMPLATE_DECL | |
2120 | /* This next line is the `argument expression is not just a | |
2121 | simple identifier' condition and also the `specialized | |
2122 | non-type argument' bit. */ | |
2123 | && TREE_CODE (arg) != TEMPLATE_PARM_INDEX) | |
2124 | { | |
2125 | if (tpd.arg_uses_template_parms[i]) | |
8251199e | 2126 | cp_error ("template argument `%E' involves template parameter(s)", arg); |
6c30752f MM |
2127 | else |
2128 | { | |
2129 | /* Look at the corresponding template parameter, | |
2130 | marking which template parameters its type depends | |
2131 | upon. */ | |
2132 | tree type = | |
2133 | TREE_TYPE (TREE_VALUE (TREE_VEC_ELT (main_inner_parms, | |
2134 | i))); | |
2135 | ||
2136 | if (!tpd2.parms) | |
2137 | { | |
2138 | /* We haven't yet initialized TPD2. Do so now. */ | |
2139 | tpd2.arg_uses_template_parms | |
2140 | = (int*) alloca (sizeof (int) * nargs); | |
104bf76a | 2141 | /* The number of parameters here is the number in the |
76a83782 RH |
2142 | main template, which, as checked in the assertion |
2143 | above, is NARGS. */ | |
6c30752f MM |
2144 | tpd2.parms = (int*) alloca (sizeof (int) * nargs); |
2145 | tpd2.level = | |
2146 | TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (maintmpl)); | |
2147 | } | |
2148 | ||
104bf76a | 2149 | /* Mark the template parameters. But this time, we're |
6c30752f MM |
2150 | looking for the template parameters of the main |
2151 | template, not in the specialization. */ | |
2152 | tpd2.current_arg = i; | |
2153 | tpd2.arg_uses_template_parms[i] = 0; | |
1ddb2906 | 2154 | bzero ((PTR) tpd2.parms, sizeof (int) * nargs); |
6c30752f MM |
2155 | for_each_template_parm (type, |
2156 | &mark_template_parm, | |
2157 | &tpd2); | |
2158 | ||
2159 | if (tpd2.arg_uses_template_parms [i]) | |
2160 | { | |
2161 | /* The type depended on some template parameters. | |
2162 | If they are fully specialized in the | |
2163 | specialization, that's OK. */ | |
2164 | int j; | |
2165 | for (j = 0; j < nargs; ++j) | |
2166 | if (tpd2.parms[j] != 0 | |
2167 | && tpd.arg_uses_template_parms [j]) | |
2168 | { | |
104bf76a | 2169 | cp_error ("type `%T' of template argument `%E' depends on template parameter(s)", |
6c30752f MM |
2170 | type, |
2171 | arg); | |
2172 | break; | |
2173 | } | |
2174 | } | |
2175 | } | |
2176 | } | |
2177 | } | |
2178 | ||
2179 | if (retrieve_specialization (maintmpl, specargs)) | |
2180 | /* We've already got this specialization. */ | |
2181 | return decl; | |
2182 | ||
2183 | DECL_TEMPLATE_SPECIALIZATIONS (maintmpl) = CLASSTYPE_TI_SPEC_INFO (type) | |
2184 | = perm_tree_cons (inner_args, inner_parms, | |
2185 | DECL_TEMPLATE_SPECIALIZATIONS (maintmpl)); | |
2186 | TREE_TYPE (DECL_TEMPLATE_SPECIALIZATIONS (maintmpl)) = type; | |
2187 | return decl; | |
2188 | } | |
2189 | ||
6ba89f8e MM |
2190 | /* Check that a template declaration's use of default arguments is not |
2191 | invalid. Here, PARMS are the template parameters. IS_PRIMARY is | |
2192 | non-zero if DECL is the thing declared by a primary template. | |
2193 | IS_PARTIAL is non-zero if DECL is a partial specialization. */ | |
2194 | ||
2195 | static void | |
2196 | check_default_tmpl_args (decl, parms, is_primary, is_partial) | |
2197 | tree decl; | |
2198 | tree parms; | |
2199 | int is_primary; | |
2200 | int is_partial; | |
2201 | { | |
d8e178a0 | 2202 | const char *msg; |
6ba89f8e MM |
2203 | int last_level_to_check; |
2204 | ||
2205 | /* [temp.param] | |
2206 | ||
2207 | A default template-argument shall not be specified in a | |
2208 | function template declaration or a function template definition, nor | |
2209 | in the template-parameter-list of the definition of a member of a | |
2210 | class template. */ | |
2211 | ||
2212 | if (current_class_type | |
2213 | && !TYPE_BEING_DEFINED (current_class_type) | |
2214 | && DECL_REAL_CONTEXT (decl) == current_class_type | |
3d7de1fa | 2215 | && DECL_LANG_SPECIFIC (decl) |
6ba89f8e MM |
2216 | && DECL_DEFINED_IN_CLASS_P (decl)) |
2217 | /* We already checked these parameters when the template was | |
2218 | declared, so there's no need to do it again now. This is an | |
2219 | inline member function definition. */ | |
2220 | return; | |
2221 | ||
2222 | if (TREE_CODE (decl) != TYPE_DECL || is_partial || !is_primary) | |
2223 | /* For an ordinary class template, default template arguments are | |
2224 | allowed at the innermost level, e.g.: | |
2225 | template <class T = int> | |
2226 | struct S {}; | |
2227 | but, in a partial specialization, they're not allowed even | |
2228 | there, as we have in [temp.class.spec]: | |
2229 | ||
2230 | The template parameter list of a specialization shall not | |
2231 | contain default template argument values. | |
2232 | ||
2233 | So, for a partial specialization, or for a function template, | |
2234 | we look at all of them. */ | |
2235 | ; | |
2236 | else | |
2237 | /* But, for a primary class template that is not a partial | |
2238 | specialization we look at all template parameters except the | |
2239 | innermost ones. */ | |
2240 | parms = TREE_CHAIN (parms); | |
2241 | ||
2242 | /* Figure out what error message to issue. */ | |
2243 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
2244 | msg = "default argument for template parameter in function template `%D'"; | |
2245 | else if (is_partial) | |
2246 | msg = "default argument in partial specialization `%D'"; | |
2247 | else | |
2248 | msg = "default argument for template parameter for class enclosing `%D'"; | |
2249 | ||
2250 | if (current_class_type && TYPE_BEING_DEFINED (current_class_type)) | |
2251 | /* If we're inside a class definition, there's no need to | |
104bf76a | 2252 | examine the parameters to the class itself. On the one |
6ba89f8e MM |
2253 | hand, they will be checked when the class is defined, and, |
2254 | on the other, default arguments are legal in things like: | |
2255 | template <class T = double> | |
2256 | struct S { template <class U> void f(U); }; | |
2257 | Here the default argument for `S' has no bearing on the | |
2258 | declaration of `f'. */ | |
2259 | last_level_to_check = template_class_depth (current_class_type) + 1; | |
2260 | else | |
2261 | /* Check everything. */ | |
2262 | last_level_to_check = 0; | |
2263 | ||
2264 | for (; parms && TMPL_PARMS_DEPTH (parms) >= last_level_to_check; | |
2265 | parms = TREE_CHAIN (parms)) | |
2266 | { | |
2267 | tree inner_parms = TREE_VALUE (parms); | |
2268 | int i, ntparms; | |
2269 | ||
2270 | ntparms = TREE_VEC_LENGTH (inner_parms); | |
2271 | for (i = 0; i < ntparms; ++i) | |
2272 | if (TREE_PURPOSE (TREE_VEC_ELT (inner_parms, i))) | |
2273 | { | |
2274 | if (msg) | |
2275 | { | |
2276 | cp_error (msg, decl); | |
2277 | msg = 0; | |
2278 | } | |
2279 | ||
2280 | /* Clear out the default argument so that we are not | |
2281 | confused later. */ | |
2282 | TREE_PURPOSE (TREE_VEC_ELT (inner_parms, i)) = NULL_TREE; | |
2283 | } | |
2284 | ||
2285 | /* At this point, if we're still interested in issuing messages, | |
2286 | they must apply to classes surrounding the object declared. */ | |
2287 | if (msg) | |
2288 | msg = "default argument for template parameter for class enclosing `%D'"; | |
2289 | } | |
2290 | } | |
2291 | ||
3ac3d9ea | 2292 | /* Creates a TEMPLATE_DECL for the indicated DECL using the template |
f84b4be9 JM |
2293 | parameters given by current_template_args, or reuses a |
2294 | previously existing one, if appropriate. Returns the DECL, or an | |
6757edfe MM |
2295 | equivalent one, if it is replaced via a call to duplicate_decls. |
2296 | ||
2297 | If IS_FRIEND is non-zero, DECL is a friend declaration. */ | |
3ac3d9ea MM |
2298 | |
2299 | tree | |
6757edfe | 2300 | push_template_decl_real (decl, is_friend) |
9a3b49ac | 2301 | tree decl; |
6757edfe | 2302 | int is_friend; |
9a3b49ac MS |
2303 | { |
2304 | tree tmpl; | |
f84b4be9 | 2305 | tree args; |
9a3b49ac | 2306 | tree info; |
f84b4be9 JM |
2307 | tree ctx; |
2308 | int primary; | |
6ba89f8e MM |
2309 | int is_partial; |
2310 | ||
2311 | /* See if this is a partial specialization. */ | |
2312 | is_partial = (TREE_CODE (decl) == TYPE_DECL && DECL_ARTIFICIAL (decl) | |
2313 | && TREE_CODE (TREE_TYPE (decl)) != ENUMERAL_TYPE | |
2314 | && CLASSTYPE_TEMPLATE_SPECIALIZATION (TREE_TYPE (decl))); | |
6757edfe MM |
2315 | |
2316 | is_friend |= (TREE_CODE (decl) == FUNCTION_DECL && DECL_FRIEND_P (decl)); | |
f84b4be9 JM |
2317 | |
2318 | if (is_friend) | |
2319 | /* For a friend, we want the context of the friend function, not | |
2320 | the type of which it is a friend. */ | |
2321 | ctx = DECL_CONTEXT (decl); | |
2c73f9f5 ML |
2322 | else if (DECL_REAL_CONTEXT (decl) |
2323 | && TREE_CODE (DECL_REAL_CONTEXT (decl)) != NAMESPACE_DECL) | |
f84b4be9 JM |
2324 | /* In the case of a virtual function, we want the class in which |
2325 | it is defined. */ | |
2326 | ctx = DECL_REAL_CONTEXT (decl); | |
2327 | else | |
2328 | /* Otherwise, if we're currently definining some class, the DECL | |
2329 | is assumed to be a member of the class. */ | |
2330 | ctx = current_class_type; | |
2331 | ||
2c73f9f5 ML |
2332 | if (ctx && TREE_CODE (ctx) == NAMESPACE_DECL) |
2333 | ctx = NULL_TREE; | |
2334 | ||
2335 | if (!DECL_CONTEXT (decl)) | |
cb0dbb9a | 2336 | DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace); |
2c73f9f5 | 2337 | |
93cdc044 JM |
2338 | /* For determining whether this is a primary template or not, we're really |
2339 | interested in the lexical context, not the true context. */ | |
2340 | if (is_friend) | |
36a117a5 | 2341 | info = current_class_type; |
93cdc044 JM |
2342 | else |
2343 | info = ctx; | |
2344 | ||
6ba89f8e | 2345 | /* See if this is a primary template. */ |
93cdc044 JM |
2346 | if (info && TREE_CODE (info) == FUNCTION_DECL) |
2347 | primary = 0; | |
6757edfe MM |
2348 | /* Note that template_class_depth returns 0 if given NULL_TREE, so |
2349 | this next line works even when we are at global scope. */ | |
2350 | else if (processing_template_decl > template_class_depth (info)) | |
9a3b49ac | 2351 | primary = 1; |
f84b4be9 JM |
2352 | else |
2353 | primary = 0; | |
9a3b49ac | 2354 | |
83566abf JM |
2355 | if (primary) |
2356 | { | |
2357 | if (current_lang_name == lang_name_c) | |
8251199e | 2358 | cp_error ("template with C linkage"); |
83566abf | 2359 | if (TREE_CODE (decl) == TYPE_DECL && ANON_AGGRNAME_P (DECL_NAME (decl))) |
8251199e | 2360 | cp_error ("template class without a name"); |
ed44da02 MM |
2361 | if (TREE_CODE (decl) == TYPE_DECL |
2362 | && TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE) | |
8251199e | 2363 | cp_error ("template declaration of `%#T'", TREE_TYPE (decl)); |
83566abf JM |
2364 | } |
2365 | ||
6ba89f8e MM |
2366 | /* Check to see that the rules regarding the use of default |
2367 | arguments are not being violated. */ | |
2368 | check_default_tmpl_args (decl, current_template_parms, | |
2369 | primary, is_partial); | |
73aad9b9 | 2370 | |
6ba89f8e MM |
2371 | if (is_partial) |
2372 | return process_partial_specialization (decl); | |
d32789d8 | 2373 | |
9a3b49ac MS |
2374 | args = current_template_args (); |
2375 | ||
f84b4be9 JM |
2376 | if (!ctx |
2377 | || TREE_CODE (ctx) == FUNCTION_DECL | |
2378 | || TYPE_BEING_DEFINED (ctx) | |
2379 | || (is_friend && !DECL_TEMPLATE_INFO (decl))) | |
8d08fdba | 2380 | { |
75650646 | 2381 | if (DECL_LANG_SPECIFIC (decl) |
f84b4be9 JM |
2382 | && DECL_TEMPLATE_INFO (decl) |
2383 | && DECL_TI_TEMPLATE (decl)) | |
2384 | tmpl = DECL_TI_TEMPLATE (decl); | |
2385 | else | |
786b5245 | 2386 | { |
f84b4be9 JM |
2387 | tmpl = build_template_decl (decl, current_template_parms); |
2388 | ||
2389 | if (DECL_LANG_SPECIFIC (decl) | |
2390 | && DECL_TEMPLATE_SPECIALIZATION (decl)) | |
2391 | { | |
2392 | /* A specialization of a member template of a template | |
2393 | class. */ | |
2394 | SET_DECL_TEMPLATE_SPECIALIZATION (tmpl); | |
2395 | DECL_TEMPLATE_INFO (tmpl) = DECL_TEMPLATE_INFO (decl); | |
2396 | DECL_TEMPLATE_INFO (decl) = NULL_TREE; | |
2397 | } | |
786b5245 | 2398 | } |
8d08fdba MS |
2399 | } |
2400 | else | |
2401 | { | |
e1a5ccf7 | 2402 | tree a, t, current, parms; |
ba4f4e5d | 2403 | int i; |
6633d636 | 2404 | |
73aad9b9 | 2405 | if (CLASSTYPE_TEMPLATE_INSTANTIATION (ctx)) |
8251199e | 2406 | cp_error ("must specialize `%#T' before defining member `%#D'", |
73aad9b9 | 2407 | ctx, decl); |
6b9ab5cc MM |
2408 | if (TREE_CODE (decl) == TYPE_DECL) |
2409 | { | |
ed44da02 MM |
2410 | if ((IS_AGGR_TYPE_CODE (TREE_CODE (TREE_TYPE (decl))) |
2411 | || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE) | |
2412 | && TYPE_TEMPLATE_INFO (TREE_TYPE (decl)) | |
2413 | && TYPE_TI_TEMPLATE (TREE_TYPE (decl))) | |
2414 | tmpl = TYPE_TI_TEMPLATE (TREE_TYPE (decl)); | |
6b9ab5cc MM |
2415 | else |
2416 | { | |
8251199e | 2417 | cp_error ("`%D' does not declare a template type", decl); |
6b9ab5cc MM |
2418 | return decl; |
2419 | } | |
2420 | } | |
fc378698 | 2421 | else if (! DECL_TEMPLATE_INFO (decl)) |
c91a56d2 | 2422 | { |
8251199e | 2423 | cp_error ("template definition of non-template `%#D'", decl); |
3ac3d9ea | 2424 | return decl; |
c91a56d2 | 2425 | } |
8d08fdba | 2426 | else |
5566b478 | 2427 | tmpl = DECL_TI_TEMPLATE (decl); |
98c1c668 | 2428 | |
e1a5ccf7 JM |
2429 | if (is_member_template (tmpl) |
2430 | && DECL_FUNCTION_TEMPLATE_P (tmpl) | |
2431 | && DECL_TEMPLATE_INFO (decl) && DECL_TI_ARGS (decl) | |
2432 | && DECL_TEMPLATE_SPECIALIZATION (decl)) | |
98c1c668 | 2433 | { |
e1a5ccf7 JM |
2434 | tree new_tmpl; |
2435 | ||
2436 | /* The declaration is a specialization of a member | |
2437 | template, declared outside the class. Therefore, the | |
2438 | innermost template arguments will be NULL, so we | |
2439 | replace them with the arguments determined by the | |
2440 | earlier call to check_explicit_specialization. */ | |
2441 | args = DECL_TI_ARGS (decl); | |
2442 | ||
2443 | new_tmpl | |
2444 | = build_template_decl (decl, current_template_parms); | |
2445 | DECL_TEMPLATE_RESULT (new_tmpl) = decl; | |
2446 | TREE_TYPE (new_tmpl) = TREE_TYPE (decl); | |
2447 | DECL_TI_TEMPLATE (decl) = new_tmpl; | |
2448 | SET_DECL_TEMPLATE_SPECIALIZATION (new_tmpl); | |
2449 | DECL_TEMPLATE_INFO (new_tmpl) = | |
2450 | perm_tree_cons (tmpl, args, NULL_TREE); | |
2451 | ||
2452 | register_specialization (new_tmpl, tmpl, args); | |
2453 | return decl; | |
98c1c668 | 2454 | } |
98c1c668 | 2455 | |
e1a5ccf7 | 2456 | /* Make sure the template headers we got make sense. */ |
6633d636 | 2457 | |
e1a5ccf7 JM |
2458 | parms = DECL_TEMPLATE_PARMS (tmpl); |
2459 | i = TMPL_PARMS_DEPTH (parms); | |
2460 | if (TMPL_ARGS_DEPTH (args) != i) | |
98c1c668 | 2461 | { |
e1a5ccf7 JM |
2462 | cp_error ("expected %d levels of template parms for `%#D', got %d", |
2463 | i, decl, TMPL_ARGS_DEPTH (args)); | |
98c1c668 | 2464 | } |
e1a5ccf7 JM |
2465 | else |
2466 | for (current = decl; i > 0; --i, parms = TREE_CHAIN (parms)) | |
2467 | { | |
2468 | a = TMPL_ARGS_LEVEL (args, i); | |
2469 | t = INNERMOST_TEMPLATE_PARMS (parms); | |
2470 | ||
2471 | if (TREE_VEC_LENGTH (t) != TREE_VEC_LENGTH (a)) | |
2472 | { | |
2473 | if (current == decl) | |
2474 | cp_error ("got %d template parameters for `%#D'", | |
2475 | TREE_VEC_LENGTH (a), decl); | |
2476 | else | |
2477 | cp_error ("got %d template parameters for `%#T'", | |
2478 | TREE_VEC_LENGTH (a), current); | |
2479 | cp_error (" but %d required", TREE_VEC_LENGTH (t)); | |
2480 | } | |
98c1c668 | 2481 | |
e1a5ccf7 JM |
2482 | /* Perhaps we should also check that the parms are used in the |
2483 | appropriate qualifying scopes in the declarator? */ | |
6633d636 | 2484 | |
e1a5ccf7 JM |
2485 | if (current == decl) |
2486 | current = ctx; | |
2487 | else | |
2488 | current = TYPE_CONTEXT (current); | |
2489 | } | |
5566b478 | 2490 | } |
8d08fdba | 2491 | |
5566b478 MS |
2492 | DECL_TEMPLATE_RESULT (tmpl) = decl; |
2493 | TREE_TYPE (tmpl) = TREE_TYPE (decl); | |
8d08fdba | 2494 | |
36a117a5 MM |
2495 | /* Push template declarations for global functions and types. Note |
2496 | that we do not try to push a global template friend declared in a | |
2497 | template class; such a thing may well depend on the template | |
39c01e4c | 2498 | parameters of the class. */ |
36a117a5 MM |
2499 | if (! ctx |
2500 | && !(is_friend && template_class_depth (current_class_type) > 0)) | |
2c73f9f5 | 2501 | tmpl = pushdecl_namespace_level (tmpl); |
8d08fdba | 2502 | |
5566b478 | 2503 | if (primary) |
6757edfe | 2504 | DECL_PRIMARY_TEMPLATE (tmpl) = tmpl; |
5566b478 MS |
2505 | |
2506 | info = perm_tree_cons (tmpl, args, NULL_TREE); | |
2507 | ||
824b9a4c | 2508 | if (TREE_CODE (decl) == TYPE_DECL && DECL_ARTIFICIAL (decl)) |
8d08fdba | 2509 | { |
ed44da02 MM |
2510 | SET_TYPE_TEMPLATE_INFO (TREE_TYPE (tmpl), info); |
2511 | if ((!ctx || TREE_CODE (ctx) != FUNCTION_DECL) | |
2512 | && TREE_CODE (TREE_TYPE (decl)) != ENUMERAL_TYPE) | |
75650646 | 2513 | DECL_NAME (decl) = classtype_mangled_name (TREE_TYPE (decl)); |
51c184be | 2514 | } |
ec255269 | 2515 | else if (! DECL_LANG_SPECIFIC (decl)) |
8251199e | 2516 | cp_error ("template declaration of `%#D'", decl); |
51c184be | 2517 | else |
5566b478 | 2518 | DECL_TEMPLATE_INFO (decl) = info; |
3ac3d9ea MM |
2519 | |
2520 | return DECL_TEMPLATE_RESULT (tmpl); | |
8d08fdba MS |
2521 | } |
2522 | ||
6757edfe MM |
2523 | tree |
2524 | push_template_decl (decl) | |
2525 | tree decl; | |
2526 | { | |
2527 | return push_template_decl_real (decl, 0); | |
2528 | } | |
2529 | ||
2530 | /* Called when a class template TYPE is redeclared with the indicated | |
2531 | template PARMS, e.g.: | |
7fe6899f MM |
2532 | |
2533 | template <class T> struct S; | |
2534 | template <class T> struct S {}; */ | |
2535 | ||
2536 | void | |
6757edfe | 2537 | redeclare_class_template (type, parms) |
7fe6899f | 2538 | tree type; |
6757edfe | 2539 | tree parms; |
7fe6899f | 2540 | { |
3d7de1fa | 2541 | tree tmpl; |
6757edfe | 2542 | tree tmpl_parms; |
7fe6899f MM |
2543 | int i; |
2544 | ||
3d7de1fa MM |
2545 | if (!TYPE_TEMPLATE_INFO (type)) |
2546 | { | |
2547 | cp_error ("`%T' is not a template type", type); | |
2548 | return; | |
2549 | } | |
2550 | ||
2551 | tmpl = TYPE_TI_TEMPLATE (type); | |
7fe6899f MM |
2552 | if (!PRIMARY_TEMPLATE_P (tmpl)) |
2553 | /* The type is nested in some template class. Nothing to worry | |
2554 | about here; there are no new template parameters for the nested | |
2555 | type. */ | |
2556 | return; | |
2557 | ||
6757edfe MM |
2558 | parms = INNERMOST_TEMPLATE_PARMS (parms); |
2559 | tmpl_parms = DECL_INNERMOST_TEMPLATE_PARMS (tmpl); | |
2560 | ||
7fe6899f MM |
2561 | if (TREE_VEC_LENGTH (parms) != TREE_VEC_LENGTH (tmpl_parms)) |
2562 | { | |
8251199e JM |
2563 | cp_error_at ("previous declaration `%D'", tmpl); |
2564 | cp_error ("used %d template parameter%s instead of %d", | |
7fe6899f MM |
2565 | TREE_VEC_LENGTH (tmpl_parms), |
2566 | TREE_VEC_LENGTH (tmpl_parms) == 1 ? "" : "s", | |
2567 | TREE_VEC_LENGTH (parms)); | |
2568 | return; | |
2569 | } | |
2570 | ||
2571 | for (i = 0; i < TREE_VEC_LENGTH (tmpl_parms); ++i) | |
2572 | { | |
2573 | tree tmpl_parm = TREE_VALUE (TREE_VEC_ELT (tmpl_parms, i)); | |
2574 | tree parm = TREE_VALUE (TREE_VEC_ELT (parms, i)); | |
2575 | tree tmpl_default = TREE_PURPOSE (TREE_VEC_ELT (tmpl_parms, i)); | |
2576 | tree parm_default = TREE_PURPOSE (TREE_VEC_ELT (parms, i)); | |
2577 | ||
2578 | if (TREE_CODE (tmpl_parm) != TREE_CODE (parm)) | |
2579 | { | |
8251199e JM |
2580 | cp_error_at ("template parameter `%#D'", tmpl_parm); |
2581 | cp_error ("redeclared here as `%#D'", parm); | |
7fe6899f MM |
2582 | return; |
2583 | } | |
2584 | ||
2585 | if (tmpl_default != NULL_TREE && parm_default != NULL_TREE) | |
2586 | { | |
2587 | /* We have in [temp.param]: | |
2588 | ||
2589 | A template-parameter may not be given default arguments | |
2590 | by two different declarations in the same scope. */ | |
8251199e JM |
2591 | cp_error ("redefinition of default argument for `%#D'", parm); |
2592 | cp_error_at (" original definition appeared here", tmpl_parm); | |
7fe6899f MM |
2593 | return; |
2594 | } | |
2595 | ||
2596 | if (parm_default != NULL_TREE) | |
2597 | /* Update the previous template parameters (which are the ones | |
2598 | that will really count) with the new default value. */ | |
2599 | TREE_PURPOSE (TREE_VEC_ELT (tmpl_parms, i)) = parm_default; | |
2600 | } | |
2601 | } | |
75650646 | 2602 | |
75650646 MM |
2603 | /* Attempt to convert the non-type template parameter EXPR to the |
2604 | indicated TYPE. If the conversion is successful, return the | |
2605 | converted value. If the conversion is unsuccesful, return | |
2606 | NULL_TREE if we issued an error message, or error_mark_node if we | |
2607 | did not. We issue error messages for out-and-out bad template | |
2608 | parameters, but not simply because the conversion failed, since we | |
2609 | might be just trying to do argument deduction. By the time this | |
2610 | function is called, neither TYPE nor EXPR may make use of template | |
2611 | parameters. */ | |
2612 | ||
2613 | static tree | |
e1467ff2 | 2614 | convert_nontype_argument (type, expr) |
75650646 MM |
2615 | tree type; |
2616 | tree expr; | |
2617 | { | |
2618 | tree expr_type = TREE_TYPE (expr); | |
2619 | ||
2620 | /* A template-argument for a non-type, non-template | |
2621 | template-parameter shall be one of: | |
2622 | ||
2623 | --an integral constant-expression of integral or enumeration | |
2624 | type; or | |
2625 | ||
2626 | --the name of a non-type template-parameter; or | |
2627 | ||
2628 | --the name of an object or function with external linkage, | |
2629 | including function templates and function template-ids but | |
86052cc3 | 2630 | excluding non-static class members, expressed as id-expression; |
75650646 MM |
2631 | or |
2632 | ||
2633 | --the address of an object or function with external linkage, | |
2634 | including function templates and function template-ids but | |
2635 | excluding non-static class members, expressed as & id-expression | |
2636 | where the & is optional if the name refers to a function or | |
2637 | array; or | |
2638 | ||
2639 | --a pointer to member expressed as described in _expr.unary.op_. */ | |
2640 | ||
86052cc3 JM |
2641 | /* An integral constant-expression can include const variables |
2642 | or enumerators. */ | |
2643 | if (INTEGRAL_TYPE_P (expr_type) && TREE_READONLY_DECL_P (expr)) | |
2644 | expr = decl_constant_value (expr); | |
2645 | ||
7bf2682f MM |
2646 | if (is_overloaded_fn (expr)) |
2647 | /* OK for now. We'll check that it has external linkage later. | |
2648 | Check this first since if expr_type is the unknown_type_node | |
2649 | we would otherwise complain below. */ | |
2650 | ; | |
e08a8f45 MM |
2651 | else if (TYPE_PTRMEM_P (expr_type) |
2652 | || TYPE_PTRMEMFUNC_P (expr_type)) | |
2653 | { | |
2654 | if (TREE_CODE (expr) != PTRMEM_CST) | |
2655 | goto bad_argument; | |
2656 | } | |
f3400fe2 | 2657 | else if (TYPE_PTR_P (expr_type) |
e08a8f45 | 2658 | || TYPE_PTRMEM_P (expr_type) |
f3400fe2 JM |
2659 | || TREE_CODE (expr_type) == ARRAY_TYPE |
2660 | || TREE_CODE (type) == REFERENCE_TYPE | |
75650646 MM |
2661 | /* If expr is the address of an overloaded function, we |
2662 | will get the unknown_type_node at this point. */ | |
2663 | || expr_type == unknown_type_node) | |
2664 | { | |
2665 | tree referent; | |
49bf0d6f MM |
2666 | tree e = expr; |
2667 | STRIP_NOPS (e); | |
75650646 | 2668 | |
f3400fe2 JM |
2669 | if (TREE_CODE (type) == REFERENCE_TYPE |
2670 | || TREE_CODE (expr_type) == ARRAY_TYPE) | |
2671 | referent = e; | |
2672 | else | |
75650646 | 2673 | { |
f3400fe2 JM |
2674 | if (TREE_CODE (e) != ADDR_EXPR) |
2675 | { | |
2676 | bad_argument: | |
2677 | cp_error ("`%E' is not a valid template argument", expr); | |
e08a8f45 MM |
2678 | if (TYPE_PTR_P (expr_type)) |
2679 | { | |
2680 | if (TREE_CODE (TREE_TYPE (expr_type)) == FUNCTION_TYPE) | |
2681 | cp_error ("it must be the address of a function with external linkage"); | |
2682 | else | |
2683 | cp_error ("it must be the address of an object with external linkage"); | |
2684 | } | |
2685 | else if (TYPE_PTRMEM_P (expr_type) | |
2686 | || TYPE_PTRMEMFUNC_P (expr_type)) | |
2687 | cp_error ("it must be a pointer-to-member of the form `&X::Y'"); | |
2688 | ||
f3400fe2 JM |
2689 | return NULL_TREE; |
2690 | } | |
2691 | ||
2692 | referent = TREE_OPERAND (e, 0); | |
2693 | STRIP_NOPS (referent); | |
75650646 MM |
2694 | } |
2695 | ||
75650646 MM |
2696 | if (TREE_CODE (referent) == STRING_CST) |
2697 | { | |
8251199e | 2698 | cp_error ("string literal %E is not a valid template argument", |
75650646 | 2699 | referent); |
8251199e | 2700 | error ("because it is the address of an object with static linkage"); |
75650646 MM |
2701 | return NULL_TREE; |
2702 | } | |
2703 | ||
2704 | if (is_overloaded_fn (referent)) | |
2705 | /* We'll check that it has external linkage later. */ | |
2706 | ; | |
2707 | else if (TREE_CODE (referent) != VAR_DECL) | |
2708 | goto bad_argument; | |
2709 | else if (!TREE_PUBLIC (referent)) | |
2710 | { | |
8251199e | 2711 | cp_error ("address of non-extern `%E' cannot be used as template argument", referent); |
75650646 MM |
2712 | return error_mark_node; |
2713 | } | |
2714 | } | |
f3400fe2 JM |
2715 | else if (INTEGRAL_TYPE_P (expr_type) |
2716 | || TYPE_PTRMEM_P (expr_type) | |
2717 | || TYPE_PTRMEMFUNC_P (expr_type) | |
2718 | /* The next two are g++ extensions. */ | |
2719 | || TREE_CODE (expr_type) == REAL_TYPE | |
2720 | || TREE_CODE (expr_type) == COMPLEX_TYPE) | |
75650646 | 2721 | { |
f3400fe2 JM |
2722 | if (! TREE_CONSTANT (expr)) |
2723 | { | |
2724 | non_constant: | |
2725 | cp_error ("non-constant `%E' cannot be used as template argument", | |
2726 | expr); | |
2727 | return NULL_TREE; | |
2728 | } | |
75650646 | 2729 | } |
75650646 MM |
2730 | else |
2731 | { | |
8251199e | 2732 | cp_error ("object `%E' cannot be used as template argument", expr); |
75650646 MM |
2733 | return NULL_TREE; |
2734 | } | |
2735 | ||
2736 | switch (TREE_CODE (type)) | |
2737 | { | |
2738 | case INTEGER_TYPE: | |
2739 | case BOOLEAN_TYPE: | |
2740 | case ENUMERAL_TYPE: | |
2741 | /* For a non-type template-parameter of integral or enumeration | |
2742 | type, integral promotions (_conv.prom_) and integral | |
2743 | conversions (_conv.integral_) are applied. */ | |
2744 | if (!INTEGRAL_TYPE_P (expr_type)) | |
2745 | return error_mark_node; | |
2746 | ||
2747 | /* It's safe to call digest_init in this case; we know we're | |
2748 | just converting one integral constant expression to another. */ | |
db02b6b9 | 2749 | expr = digest_init (type, expr, (tree*) 0); |
75650646 | 2750 | |
db02b6b9 | 2751 | if (TREE_CODE (expr) != INTEGER_CST) |
f3400fe2 | 2752 | /* Curiously, some TREE_CONSTANT integral expressions do not |
db02b6b9 MM |
2753 | simplify to integer constants. For example, `3 % 0', |
2754 | remains a TRUNC_MOD_EXPR. */ | |
2755 | goto non_constant; | |
2756 | ||
2757 | return expr; | |
2758 | ||
abff8e06 JM |
2759 | case REAL_TYPE: |
2760 | case COMPLEX_TYPE: | |
2761 | /* These are g++ extensions. */ | |
2762 | if (TREE_CODE (expr_type) != TREE_CODE (type)) | |
2763 | return error_mark_node; | |
2764 | ||
db02b6b9 MM |
2765 | expr = digest_init (type, expr, (tree*) 0); |
2766 | ||
2767 | if (TREE_CODE (expr) != REAL_CST) | |
2768 | goto non_constant; | |
2769 | ||
2770 | return expr; | |
abff8e06 | 2771 | |
75650646 MM |
2772 | case POINTER_TYPE: |
2773 | { | |
2774 | tree type_pointed_to = TREE_TYPE (type); | |
2775 | ||
2776 | if (TYPE_PTRMEM_P (type)) | |
93aa462d MM |
2777 | { |
2778 | tree e; | |
2779 | ||
2780 | /* For a non-type template-parameter of type pointer to data | |
2781 | member, qualification conversions (_conv.qual_) are | |
2782 | applied. */ | |
2783 | e = perform_qualification_conversions (type, expr); | |
2784 | if (TREE_CODE (e) == NOP_EXPR) | |
87533b37 MM |
2785 | /* The call to perform_qualification_conversions will |
2786 | insert a NOP_EXPR over EXPR to do express conversion, | |
2787 | if necessary. But, that will confuse us if we use | |
2788 | this (converted) template parameter to instantiate | |
2789 | another template; then the thing will not look like a | |
2790 | valid template argument. So, just make a new | |
2791 | constant, of the appropriate type. */ | |
2792 | e = make_ptrmem_cst (type, PTRMEM_CST_MEMBER (expr)); | |
93aa462d MM |
2793 | return e; |
2794 | } | |
75650646 MM |
2795 | else if (TREE_CODE (type_pointed_to) == FUNCTION_TYPE) |
2796 | { | |
2797 | /* For a non-type template-parameter of type pointer to | |
2798 | function, only the function-to-pointer conversion | |
2799 | (_conv.func_) is applied. If the template-argument | |
2800 | represents a set of overloaded functions (or a pointer to | |
2801 | such), the matching function is selected from the set | |
2802 | (_over.over_). */ | |
2803 | tree fns; | |
2804 | tree fn; | |
2805 | ||
7bf2682f | 2806 | if (TREE_CODE (expr) == ADDR_EXPR) |
75650646 MM |
2807 | fns = TREE_OPERAND (expr, 0); |
2808 | else | |
2809 | fns = expr; | |
2810 | ||
a05273d4 | 2811 | fn = instantiate_type (type_pointed_to, fns, 0); |
75650646 MM |
2812 | |
2813 | if (fn == error_mark_node) | |
2814 | return error_mark_node; | |
2815 | ||
2816 | if (!TREE_PUBLIC (fn)) | |
2817 | { | |
2818 | if (really_overloaded_fn (fns)) | |
2819 | return error_mark_node; | |
2820 | else | |
2821 | goto bad_argument; | |
2822 | } | |
2823 | ||
2824 | expr = build_unary_op (ADDR_EXPR, fn, 0); | |
2825 | ||
3bfdc719 | 2826 | my_friendly_assert (same_type_p (type, TREE_TYPE (expr)), |
75650646 MM |
2827 | 0); |
2828 | return expr; | |
2829 | } | |
2830 | else | |
2831 | { | |
2832 | /* For a non-type template-parameter of type pointer to | |
2833 | object, qualification conversions (_conv.qual_) and the | |
2834 | array-to-pointer conversion (_conv.array_) are applied. | |
2835 | [Note: In particular, neither the null pointer conversion | |
2836 | (_conv.ptr_) nor the derived-to-base conversion | |
2837 | (_conv.ptr_) are applied. Although 0 is a valid | |
2838 | template-argument for a non-type template-parameter of | |
2839 | integral type, it is not a valid template-argument for a | |
e1467ff2 MM |
2840 | non-type template-parameter of pointer type.] |
2841 | ||
2842 | The call to decay_conversion performs the | |
2843 | array-to-pointer conversion, if appropriate. */ | |
2844 | expr = decay_conversion (expr); | |
75650646 MM |
2845 | |
2846 | if (expr == error_mark_node) | |
2847 | return error_mark_node; | |
2848 | else | |
2849 | return perform_qualification_conversions (type, expr); | |
2850 | } | |
2851 | } | |
2852 | break; | |
2853 | ||
2854 | case REFERENCE_TYPE: | |
2855 | { | |
2856 | tree type_referred_to = TREE_TYPE (type); | |
2857 | ||
2858 | if (TREE_CODE (type_referred_to) == FUNCTION_TYPE) | |
2859 | { | |
2860 | /* For a non-type template-parameter of type reference to | |
39c01e4c MM |
2861 | function, no conversions apply. If the |
2862 | template-argument represents a set of overloaded | |
2863 | functions, the matching function is selected from the | |
2864 | set (_over.over_). */ | |
75650646 MM |
2865 | tree fns = expr; |
2866 | tree fn; | |
2867 | ||
a05273d4 | 2868 | fn = instantiate_type (type_referred_to, fns, 0); |
e6e174e5 JM |
2869 | |
2870 | if (fn == error_mark_node) | |
2871 | return error_mark_node; | |
75650646 MM |
2872 | |
2873 | if (!TREE_PUBLIC (fn)) | |
2874 | { | |
2875 | if (really_overloaded_fn (fns)) | |
2876 | /* Don't issue an error here; we might get a different | |
2877 | function if the overloading had worked out | |
2878 | differently. */ | |
2879 | return error_mark_node; | |
2880 | else | |
2881 | goto bad_argument; | |
2882 | } | |
2883 | ||
3bfdc719 MM |
2884 | my_friendly_assert (same_type_p (type_referred_to, |
2885 | TREE_TYPE (fn)), | |
75650646 MM |
2886 | 0); |
2887 | ||
2888 | return fn; | |
2889 | } | |
2890 | else | |
2891 | { | |
2892 | /* For a non-type template-parameter of type reference to | |
2893 | object, no conversions apply. The type referred to by the | |
2894 | reference may be more cv-qualified than the (otherwise | |
2895 | identical) type of the template-argument. The | |
2896 | template-parameter is bound directly to the | |
2897 | template-argument, which must be an lvalue. */ | |
ff350acd JM |
2898 | if ((TYPE_MAIN_VARIANT (expr_type) |
2899 | != TYPE_MAIN_VARIANT (type_referred_to)) | |
91063b51 MM |
2900 | || !at_least_as_qualified_p (type_referred_to, |
2901 | expr_type) | |
75650646 MM |
2902 | || !real_lvalue_p (expr)) |
2903 | return error_mark_node; | |
2904 | else | |
2905 | return expr; | |
2906 | } | |
2907 | } | |
2908 | break; | |
2909 | ||
2910 | case RECORD_TYPE: | |
2911 | { | |
410c2fba KL |
2912 | if (!TYPE_PTRMEMFUNC_P (type)) |
2913 | /* This handles templates like | |
2914 | template<class T, T t> void f(); | |
2915 | when T is substituted with any class. The second template | |
2916 | parameter becomes invalid and the template candidate is | |
2917 | rejected. */ | |
2918 | return error_mark_node; | |
75650646 MM |
2919 | |
2920 | /* For a non-type template-parameter of type pointer to member | |
2921 | function, no conversions apply. If the template-argument | |
2922 | represents a set of overloaded member functions, the | |
2923 | matching member function is selected from the set | |
2924 | (_over.over_). */ | |
2925 | ||
2926 | if (!TYPE_PTRMEMFUNC_P (expr_type) && | |
2927 | expr_type != unknown_type_node) | |
2928 | return error_mark_node; | |
2929 | ||
e08a8f45 | 2930 | if (TREE_CODE (expr) == PTRMEM_CST) |
75650646 MM |
2931 | { |
2932 | /* A ptr-to-member constant. */ | |
3bfdc719 | 2933 | if (!same_type_p (type, expr_type)) |
75650646 MM |
2934 | return error_mark_node; |
2935 | else | |
2936 | return expr; | |
2937 | } | |
2938 | ||
2939 | if (TREE_CODE (expr) != ADDR_EXPR) | |
2940 | return error_mark_node; | |
2941 | ||
d8f8dca1 | 2942 | expr = instantiate_type (type, expr, 0); |
75650646 | 2943 | |
d8f8dca1 | 2944 | if (expr == error_mark_node) |
75650646 MM |
2945 | return error_mark_node; |
2946 | ||
3bfdc719 | 2947 | my_friendly_assert (same_type_p (type, TREE_TYPE (expr)), |
75650646 MM |
2948 | 0); |
2949 | return expr; | |
2950 | } | |
2951 | break; | |
2952 | ||
2953 | default: | |
2954 | /* All non-type parameters must have one of these types. */ | |
2955 | my_friendly_abort (0); | |
2956 | break; | |
2957 | } | |
2958 | ||
2959 | return error_mark_node; | |
2960 | } | |
2961 | ||
744fac59 KL |
2962 | /* Return 1 if PARM_PARMS and ARG_PARMS matches using rule for |
2963 | template template parameters. Both PARM_PARMS and ARG_PARMS are | |
2964 | vectors of TREE_LIST nodes containing TYPE_DECL, TEMPLATE_DECL | |
2965 | or PARM_DECL. | |
2966 | ||
2967 | ARG_PARMS may contain more parameters than PARM_PARMS. If this is | |
2968 | the case, then extra parameters must have default arguments. | |
2969 | ||
2970 | Consider the example: | |
2971 | template <class T, class Allocator = allocator> class vector; | |
2972 | template<template <class U> class TT> class C; | |
2973 | ||
2974 | C<vector> is a valid instantiation. PARM_PARMS for the above code | |
2975 | contains a TYPE_DECL (for U), ARG_PARMS contains two TYPE_DECLs (for | |
2976 | T and Allocator) and OUTER_ARGS contains the argument that is used to | |
2977 | substitute the TT parameter. */ | |
2978 | ||
2979 | static int | |
4393e105 MM |
2980 | coerce_template_template_parms (parm_parms, arg_parms, complain, |
2981 | in_decl, outer_args) | |
2982 | tree parm_parms, arg_parms; | |
2983 | int complain; | |
2984 | tree in_decl, outer_args; | |
744fac59 KL |
2985 | { |
2986 | int nparms, nargs, i; | |
2987 | tree parm, arg; | |
2988 | ||
2989 | my_friendly_assert (TREE_CODE (parm_parms) == TREE_VEC, 0); | |
2990 | my_friendly_assert (TREE_CODE (arg_parms) == TREE_VEC, 0); | |
2991 | ||
2992 | nparms = TREE_VEC_LENGTH (parm_parms); | |
2993 | nargs = TREE_VEC_LENGTH (arg_parms); | |
2994 | ||
2995 | /* The rule here is opposite of coerce_template_parms. */ | |
2996 | if (nargs < nparms | |
2997 | || (nargs > nparms | |
2998 | && TREE_PURPOSE (TREE_VEC_ELT (arg_parms, nparms)) == NULL_TREE)) | |
2999 | return 0; | |
3000 | ||
3001 | for (i = 0; i < nparms; ++i) | |
3002 | { | |
3003 | parm = TREE_VALUE (TREE_VEC_ELT (parm_parms, i)); | |
3004 | arg = TREE_VALUE (TREE_VEC_ELT (arg_parms, i)); | |
3005 | ||
3006 | if (arg == NULL_TREE || arg == error_mark_node | |
3007 | || parm == NULL_TREE || parm == error_mark_node) | |
3008 | return 0; | |
3009 | ||
3010 | if (TREE_CODE (arg) != TREE_CODE (parm)) | |
3011 | return 0; | |
3012 | ||
3013 | switch (TREE_CODE (parm)) | |
3014 | { | |
3015 | case TYPE_DECL: | |
3016 | break; | |
3017 | ||
3018 | case TEMPLATE_DECL: | |
3019 | /* We encounter instantiations of templates like | |
3020 | template <template <template <class> class> class TT> | |
3021 | class C; */ | |
700466c2 JM |
3022 | { |
3023 | tree parmparm = DECL_INNERMOST_TEMPLATE_PARMS (parm); | |
3024 | tree argparm = DECL_INNERMOST_TEMPLATE_PARMS (arg); | |
3025 | ||
3026 | if (!coerce_template_template_parms (parmparm, argparm, | |
4393e105 MM |
3027 | complain, in_decl, |
3028 | outer_args)) | |
700466c2 JM |
3029 | return 0; |
3030 | } | |
3031 | break; | |
744fac59 KL |
3032 | |
3033 | case PARM_DECL: | |
3034 | /* The tsubst call is used to handle cases such as | |
3035 | template <class T, template <T> class TT> class D; | |
3036 | i.e. the parameter list of TT depends on earlier parameters. */ | |
4393e105 MM |
3037 | if (!same_type_p (tsubst (TREE_TYPE (parm), outer_args, |
3038 | complain, in_decl), | |
3bfdc719 | 3039 | TREE_TYPE (arg))) |
744fac59 KL |
3040 | return 0; |
3041 | break; | |
3042 | ||
3043 | default: | |
3044 | my_friendly_abort (0); | |
3045 | } | |
3046 | } | |
3047 | return 1; | |
3048 | } | |
3049 | ||
8b5b8b7c MM |
3050 | /* Convert the indicated template ARG as necessary to match the |
3051 | indicated template PARM. Returns the converted ARG, or | |
3052 | error_mark_node if the conversion was unsuccessful. Error messages | |
3053 | are issued if COMPLAIN is non-zero. This conversion is for the Ith | |
3054 | parameter in the parameter list. ARGS is the full set of template | |
3055 | arguments deduced so far. */ | |
3056 | ||
3057 | static tree | |
3058 | convert_template_argument (parm, arg, args, complain, i, in_decl) | |
3059 | tree parm; | |
3060 | tree arg; | |
3061 | tree args; | |
3062 | int complain; | |
3063 | int i; | |
3064 | tree in_decl; | |
3065 | { | |
3066 | tree val; | |
3067 | tree inner_args; | |
3068 | int is_type, requires_type, is_tmpl_type, requires_tmpl_type; | |
3069 | ||
3070 | inner_args = innermost_args (args); | |
3071 | ||
3072 | if (TREE_CODE (arg) == TREE_LIST | |
3073 | && TREE_TYPE (arg) != NULL_TREE | |
3074 | && TREE_CODE (TREE_TYPE (arg)) == OFFSET_TYPE) | |
3075 | { | |
3076 | /* The template argument was the name of some | |
3077 | member function. That's usually | |
3078 | illegal, but static members are OK. In any | |
3079 | case, grab the underlying fields/functions | |
3080 | and issue an error later if required. */ | |
3081 | arg = TREE_VALUE (arg); | |
3082 | TREE_TYPE (arg) = unknown_type_node; | |
3083 | } | |
3084 | ||
3085 | requires_tmpl_type = TREE_CODE (parm) == TEMPLATE_DECL; | |
3086 | requires_type = (TREE_CODE (parm) == TYPE_DECL | |
3087 | || requires_tmpl_type); | |
3088 | ||
3089 | /* Check if it is a class template. If REQUIRES_TMPL_TYPE is true, | |
3090 | we also accept implicitly created TYPE_DECL as a valid argument. | |
3091 | This is necessary to handle the case where we pass a template name | |
3092 | to a template template parameter in a scope where we've derived from | |
3093 | in instantiation of that template, so the template name refers to that | |
3094 | instantiation. We really ought to handle this better. */ | |
3095 | is_tmpl_type | |
3096 | = ((TREE_CODE (arg) == TEMPLATE_DECL | |
3097 | && TREE_CODE (DECL_TEMPLATE_RESULT (arg)) == TYPE_DECL) | |
3098 | || (TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM | |
7ddedda4 | 3099 | && !TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (arg)) |
8b5b8b7c MM |
3100 | || (TREE_CODE (arg) == RECORD_TYPE |
3101 | && CLASSTYPE_TEMPLATE_INFO (arg) | |
3102 | && TREE_CODE (TYPE_NAME (arg)) == TYPE_DECL | |
3103 | && DECL_ARTIFICIAL (TYPE_NAME (arg)) | |
3104 | && requires_tmpl_type | |
b54ccf71 | 3105 | && is_base_of_enclosing_class (arg, current_class_type))); |
8b5b8b7c MM |
3106 | if (is_tmpl_type && TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM) |
3107 | arg = TYPE_STUB_DECL (arg); | |
3108 | else if (is_tmpl_type && TREE_CODE (arg) == RECORD_TYPE) | |
3109 | arg = CLASSTYPE_TI_TEMPLATE (arg); | |
3110 | ||
3111 | is_type = TREE_CODE_CLASS (TREE_CODE (arg)) == 't' || is_tmpl_type; | |
3112 | ||
3113 | if (requires_type && ! is_type && TREE_CODE (arg) == SCOPE_REF | |
3114 | && TREE_CODE (TREE_OPERAND (arg, 0)) == TEMPLATE_TYPE_PARM) | |
3115 | { | |
8251199e JM |
3116 | cp_pedwarn ("to refer to a type member of a template parameter,"); |
3117 | cp_pedwarn (" use `typename %E'", arg); | |
8b5b8b7c MM |
3118 | |
3119 | arg = make_typename_type (TREE_OPERAND (arg, 0), | |
3120 | TREE_OPERAND (arg, 1)); | |
3121 | is_type = 1; | |
3122 | } | |
3123 | if (is_type != requires_type) | |
3124 | { | |
3125 | if (in_decl) | |
3126 | { | |
3127 | if (complain) | |
3128 | { | |
8251199e | 3129 | cp_error ("type/value mismatch at argument %d in template parameter list for `%D'", |
8b5b8b7c MM |
3130 | i + 1, in_decl); |
3131 | if (is_type) | |
8251199e | 3132 | cp_error (" expected a constant of type `%T', got `%T'", |
8b5b8b7c MM |
3133 | TREE_TYPE (parm), |
3134 | (is_tmpl_type ? DECL_NAME (arg) : arg)); | |
3135 | else | |
8251199e | 3136 | cp_error (" expected a type, got `%E'", arg); |
8b5b8b7c MM |
3137 | } |
3138 | } | |
3139 | return error_mark_node; | |
3140 | } | |
3141 | if (is_tmpl_type ^ requires_tmpl_type) | |
3142 | { | |
3143 | if (in_decl && complain) | |
3144 | { | |
8251199e | 3145 | cp_error ("type/value mismatch at argument %d in template parameter list for `%D'", |
8b5b8b7c MM |
3146 | i + 1, in_decl); |
3147 | if (is_tmpl_type) | |
8251199e | 3148 | cp_error (" expected a type, got `%T'", DECL_NAME (arg)); |
8b5b8b7c | 3149 | else |
8251199e | 3150 | cp_error (" expected a class template, got `%T'", arg); |
8b5b8b7c MM |
3151 | } |
3152 | return error_mark_node; | |
3153 | } | |
3154 | ||
3155 | if (is_type) | |
3156 | { | |
3157 | if (requires_tmpl_type) | |
3158 | { | |
3159 | tree parmparm = DECL_INNERMOST_TEMPLATE_PARMS (parm); | |
3160 | tree argparm = DECL_INNERMOST_TEMPLATE_PARMS (arg); | |
3161 | ||
4393e105 | 3162 | if (coerce_template_template_parms (parmparm, argparm, complain, |
8b5b8b7c MM |
3163 | in_decl, inner_args)) |
3164 | { | |
3165 | val = arg; | |
3166 | ||
3167 | /* TEMPLATE_TEMPLATE_PARM node is preferred over | |
3168 | TEMPLATE_DECL. */ | |
3169 | if (val != error_mark_node | |
3170 | && DECL_TEMPLATE_TEMPLATE_PARM_P (val)) | |
3171 | val = TREE_TYPE (val); | |
3172 | } | |
3173 | else | |
3174 | { | |
3175 | if (in_decl && complain) | |
3176 | { | |
8251199e | 3177 | cp_error ("type/value mismatch at argument %d in template parameter list for `%D'", |
8b5b8b7c | 3178 | i + 1, in_decl); |
8251199e | 3179 | cp_error (" expected a template of type `%D', got `%D'", parm, arg); |
8b5b8b7c MM |
3180 | } |
3181 | ||
3182 | val = error_mark_node; | |
3183 | } | |
3184 | } | |
3185 | else | |
3186 | { | |
3187 | val = groktypename (arg); | |
3188 | if (! processing_template_decl) | |
3189 | { | |
3190 | /* [basic.link]: A name with no linkage (notably, the | |
3191 | name of a class or enumeration declared in a local | |
3192 | scope) shall not be used to declare an entity with | |
3193 | linkage. This implies that names with no linkage | |
3194 | cannot be used as template arguments. */ | |
3195 | tree t = no_linkage_check (val); | |
3196 | if (t) | |
3197 | { | |
3198 | if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t))) | |
8251199e JM |
3199 | cp_pedwarn |
3200 | ("template-argument `%T' uses anonymous type", val); | |
8b5b8b7c | 3201 | else |
8251199e JM |
3202 | cp_error |
3203 | ("template-argument `%T' uses local type `%T'", | |
8b5b8b7c MM |
3204 | val, t); |
3205 | return error_mark_node; | |
3206 | } | |
3207 | } | |
3208 | } | |
3209 | } | |
3210 | else | |
3211 | { | |
4393e105 | 3212 | tree t = tsubst (TREE_TYPE (parm), args, complain, in_decl); |
8b5b8b7c MM |
3213 | |
3214 | if (processing_template_decl) | |
3215 | arg = maybe_fold_nontype_arg (arg); | |
3216 | ||
3217 | if (!uses_template_parms (arg) && !uses_template_parms (t)) | |
3218 | /* We used to call digest_init here. However, digest_init | |
3219 | will report errors, which we don't want when complain | |
3220 | is zero. More importantly, digest_init will try too | |
3221 | hard to convert things: for example, `0' should not be | |
3222 | converted to pointer type at this point according to | |
3223 | the standard. Accepting this is not merely an | |
3224 | extension, since deciding whether or not these | |
3225 | conversions can occur is part of determining which | |
3226 | function template to call, or whether a given epxlicit | |
3227 | argument specification is legal. */ | |
3228 | val = convert_nontype_argument (t, arg); | |
3229 | else | |
3230 | val = arg; | |
3231 | ||
3232 | if (val == NULL_TREE) | |
3233 | val = error_mark_node; | |
3234 | else if (val == error_mark_node && complain) | |
8251199e | 3235 | cp_error ("could not convert template argument `%E' to `%T'", |
8b5b8b7c MM |
3236 | arg, t); |
3237 | } | |
3238 | ||
3239 | return val; | |
3240 | } | |
3241 | ||
3242 | /* Convert all template arguments to their appropriate types, and | |
3243 | return a vector containing the innermost resulting template | |
3244 | arguments. If any error occurs, return error_mark_node, and, if | |
3245 | COMPLAIN is non-zero, issue an error message. Some error messages | |
3246 | are issued even if COMPLAIN is zero; for instance, if a template | |
3247 | argument is composed from a local class. | |
75650646 MM |
3248 | |
3249 | If REQUIRE_ALL_ARGUMENTS is non-zero, all arguments must be | |
3250 | provided in ARGLIST, or else trailing parameters must have default | |
3251 | values. If REQUIRE_ALL_ARGUMENTS is zero, we will attempt argument | |
cabc336a MM |
3252 | deduction for any unspecified trailing arguments. |
3253 | ||
3254 | The resulting TREE_VEC is allocated on a temporary obstack, and | |
3255 | must be explicitly copied if it will be permanent. */ | |
de575009 | 3256 | |
8d08fdba | 3257 | static tree |
8b5b8b7c | 3258 | coerce_template_parms (parms, args, in_decl, |
75650646 | 3259 | complain, |
744fac59 | 3260 | require_all_arguments) |
8b5b8b7c | 3261 | tree parms, args; |
8d08fdba | 3262 | tree in_decl; |
75650646 MM |
3263 | int complain; |
3264 | int require_all_arguments; | |
8d08fdba | 3265 | { |
a292b002 | 3266 | int nparms, nargs, i, lost = 0; |
e4a84209 | 3267 | tree inner_args; |
8b5b8b7c MM |
3268 | tree new_args; |
3269 | tree new_inner_args; | |
a292b002 | 3270 | |
8b5b8b7c | 3271 | inner_args = innermost_args (args); |
e4a84209 | 3272 | nargs = NUM_TMPL_ARGS (inner_args); |
a292b002 MS |
3273 | nparms = TREE_VEC_LENGTH (parms); |
3274 | ||
3275 | if (nargs > nparms | |
3276 | || (nargs < nparms | |
75650646 | 3277 | && require_all_arguments |
a292b002 | 3278 | && TREE_PURPOSE (TREE_VEC_ELT (parms, nargs)) == NULL_TREE)) |
8d08fdba | 3279 | { |
75650646 MM |
3280 | if (complain) |
3281 | { | |
8251199e | 3282 | cp_error ("wrong number of template arguments (%d, should be %d)", |
e4a84209 | 3283 | nargs, nparms); |
75650646 MM |
3284 | |
3285 | if (in_decl) | |
8251199e | 3286 | cp_error_at ("provided for `%D'", in_decl); |
75650646 MM |
3287 | } |
3288 | ||
8d08fdba MS |
3289 | return error_mark_node; |
3290 | } | |
3291 | ||
cabc336a | 3292 | new_inner_args = make_temp_vec (nparms); |
8b5b8b7c MM |
3293 | new_args = add_outermost_template_args (args, new_inner_args); |
3294 | for (i = 0; i < nparms; i++) | |
8d08fdba | 3295 | { |
8b5b8b7c MM |
3296 | tree arg; |
3297 | tree parm; | |
e4a84209 | 3298 | |
8b5b8b7c MM |
3299 | /* Get the Ith template parameter. */ |
3300 | parm = TREE_VEC_ELT (parms, i); | |
75650646 | 3301 | |
8b5b8b7c MM |
3302 | /* Calculate the Ith argument. */ |
3303 | if (inner_args && TREE_CODE (inner_args) == TREE_LIST) | |
8d08fdba | 3304 | { |
8b5b8b7c MM |
3305 | arg = TREE_VALUE (inner_args); |
3306 | inner_args = TREE_CHAIN (inner_args); | |
8d08fdba | 3307 | } |
8b5b8b7c MM |
3308 | else if (i < nargs) |
3309 | arg = TREE_VEC_ELT (inner_args, i); | |
3310 | /* If no template argument was supplied, look for a default | |
3311 | value. */ | |
3312 | else if (TREE_PURPOSE (parm) == NULL_TREE) | |
3313 | { | |
3314 | /* There was no default value. */ | |
3315 | my_friendly_assert (!require_all_arguments, 0); | |
3316 | break; | |
3317 | } | |
3318 | else if (TREE_CODE (TREE_VALUE (parm)) == TYPE_DECL) | |
4393e105 | 3319 | arg = tsubst (TREE_PURPOSE (parm), new_args, complain, in_decl); |
8b5b8b7c | 3320 | else |
4393e105 MM |
3321 | arg = tsubst_expr (TREE_PURPOSE (parm), new_args, complain, |
3322 | in_decl); | |
e4a84209 | 3323 | |
8b5b8b7c | 3324 | /* Now, convert the Ith argument, as necessary. */ |
75650646 MM |
3325 | if (arg == NULL_TREE) |
3326 | /* We're out of arguments. */ | |
3327 | { | |
3328 | my_friendly_assert (!require_all_arguments, 0); | |
3329 | break; | |
3330 | } | |
8b5b8b7c | 3331 | else if (arg == error_mark_node) |
75650646 | 3332 | { |
8251199e | 3333 | cp_error ("template argument %d is invalid", i + 1); |
8b5b8b7c | 3334 | arg = error_mark_node; |
8d08fdba | 3335 | } |
8b5b8b7c MM |
3336 | else |
3337 | arg = convert_template_argument (TREE_VALUE (parm), | |
3338 | arg, new_args, complain, i, | |
3339 | in_decl); | |
3340 | ||
3341 | if (arg == error_mark_node) | |
8d08fdba | 3342 | lost++; |
8b5b8b7c | 3343 | TREE_VEC_ELT (new_inner_args, i) = arg; |
8d08fdba | 3344 | } |
8b5b8b7c | 3345 | |
8d08fdba MS |
3346 | if (lost) |
3347 | return error_mark_node; | |
8b5b8b7c MM |
3348 | |
3349 | return new_inner_args; | |
8d08fdba MS |
3350 | } |
3351 | ||
34016c81 JM |
3352 | /* Returns 1 if template args OT and NT are equivalent. */ |
3353 | ||
d8e178a0 | 3354 | static int |
34016c81 JM |
3355 | template_args_equal (ot, nt) |
3356 | tree ot, nt; | |
3357 | { | |
3358 | if (nt == ot) | |
3359 | return 1; | |
3360 | if (TREE_CODE (nt) != TREE_CODE (ot)) | |
3361 | return 0; | |
3362 | if (TREE_CODE (nt) == TREE_VEC) | |
3363 | /* For member templates */ | |
3364 | return comp_template_args (ot, nt); | |
3365 | else if (TREE_CODE_CLASS (TREE_CODE (ot)) == 't') | |
3bfdc719 | 3366 | return same_type_p (ot, nt); |
34016c81 JM |
3367 | else |
3368 | return (cp_tree_equal (ot, nt) > 0); | |
3369 | } | |
3370 | ||
3371 | /* Returns 1 iff the OLDARGS and NEWARGS are in fact identical sets | |
f84b4be9 JM |
3372 | of template arguments. Returns 0 otherwise. */ |
3373 | ||
6757edfe | 3374 | int |
5566b478 MS |
3375 | comp_template_args (oldargs, newargs) |
3376 | tree oldargs, newargs; | |
3377 | { | |
3378 | int i; | |
3379 | ||
386b8a85 JM |
3380 | if (TREE_VEC_LENGTH (oldargs) != TREE_VEC_LENGTH (newargs)) |
3381 | return 0; | |
3382 | ||
5566b478 MS |
3383 | for (i = 0; i < TREE_VEC_LENGTH (oldargs); ++i) |
3384 | { | |
3385 | tree nt = TREE_VEC_ELT (newargs, i); | |
3386 | tree ot = TREE_VEC_ELT (oldargs, i); | |
3387 | ||
34016c81 | 3388 | if (! template_args_equal (ot, nt)) |
61a127b3 | 3389 | return 0; |
5566b478 MS |
3390 | } |
3391 | return 1; | |
3392 | } | |
3393 | ||
8d08fdba MS |
3394 | /* Given class template name and parameter list, produce a user-friendly name |
3395 | for the instantiation. */ | |
e92cc029 | 3396 | |
8d08fdba | 3397 | static char * |
36a117a5 | 3398 | mangle_class_name_for_template (name, parms, arglist) |
8d08fdba MS |
3399 | char *name; |
3400 | tree parms, arglist; | |
3401 | { | |
3402 | static struct obstack scratch_obstack; | |
3403 | static char *scratch_firstobj; | |
3404 | int i, nparms; | |
8d08fdba MS |
3405 | |
3406 | if (!scratch_firstobj) | |
fc378698 | 3407 | gcc_obstack_init (&scratch_obstack); |
8d08fdba MS |
3408 | else |
3409 | obstack_free (&scratch_obstack, scratch_firstobj); | |
fc378698 | 3410 | scratch_firstobj = obstack_alloc (&scratch_obstack, 1); |
8d08fdba | 3411 | |
8d08fdba | 3412 | #define ccat(c) obstack_1grow (&scratch_obstack, (c)); |
8d08fdba | 3413 | #define cat(s) obstack_grow (&scratch_obstack, (s), strlen (s)) |
8d08fdba MS |
3414 | |
3415 | cat (name); | |
3416 | ccat ('<'); | |
3417 | nparms = TREE_VEC_LENGTH (parms); | |
36a117a5 | 3418 | arglist = innermost_args (arglist); |
8d08fdba MS |
3419 | my_friendly_assert (nparms == TREE_VEC_LENGTH (arglist), 268); |
3420 | for (i = 0; i < nparms; i++) | |
3421 | { | |
a292b002 MS |
3422 | tree parm = TREE_VALUE (TREE_VEC_ELT (parms, i)); |
3423 | tree arg = TREE_VEC_ELT (arglist, i); | |
8d08fdba MS |
3424 | |
3425 | if (i) | |
3426 | ccat (','); | |
3427 | ||
a292b002 | 3428 | if (TREE_CODE (parm) == TYPE_DECL) |
8d08fdba | 3429 | { |
294471c3 | 3430 | cat (type_as_string_real (arg, 0, 1)); |
8d08fdba MS |
3431 | continue; |
3432 | } | |
73b0fce8 KL |
3433 | else if (TREE_CODE (parm) == TEMPLATE_DECL) |
3434 | { | |
3435 | if (TREE_CODE (arg) == TEMPLATE_DECL) | |
2c73f9f5 ML |
3436 | { |
3437 | /* Already substituted with real template. Just output | |
3438 | the template name here */ | |
cb0dbb9a JM |
3439 | tree context = DECL_CONTEXT (arg); |
3440 | if (context) | |
2c73f9f5 | 3441 | { |
cb0dbb9a | 3442 | my_friendly_assert (TREE_CODE (context) == NAMESPACE_DECL, 980422); |
2c73f9f5 ML |
3443 | cat(decl_as_string (DECL_CONTEXT (arg), 0)); |
3444 | cat("::"); | |
3445 | } | |
3446 | cat (IDENTIFIER_POINTER (DECL_NAME (arg))); | |
3447 | } | |
73b0fce8 KL |
3448 | else |
3449 | /* Output the parameter declaration */ | |
294471c3 | 3450 | cat (type_as_string_real (arg, 0, 1)); |
73b0fce8 KL |
3451 | continue; |
3452 | } | |
8d08fdba MS |
3453 | else |
3454 | my_friendly_assert (TREE_CODE (parm) == PARM_DECL, 269); | |
3455 | ||
3456 | if (TREE_CODE (arg) == TREE_LIST) | |
3457 | { | |
3458 | /* New list cell was built because old chain link was in | |
3459 | use. */ | |
3460 | my_friendly_assert (TREE_PURPOSE (arg) == NULL_TREE, 270); | |
3461 | arg = TREE_VALUE (arg); | |
3462 | } | |
3463 | /* No need to check arglist against parmlist here; we did that | |
3464 | in coerce_template_parms, called from lookup_template_class. */ | |
3465 | cat (expr_as_string (arg, 0)); | |
3466 | } | |
3467 | { | |
3468 | char *bufp = obstack_next_free (&scratch_obstack); | |
3469 | int offset = 0; | |
3470 | while (bufp[offset - 1] == ' ') | |
3471 | offset--; | |
3472 | obstack_blank_fast (&scratch_obstack, offset); | |
3473 | ||
3474 | /* B<C<char> >, not B<C<char>> */ | |
3475 | if (bufp[offset - 1] == '>') | |
3476 | ccat (' '); | |
3477 | } | |
3478 | ccat ('>'); | |
3479 | ccat ('\0'); | |
3480 | return (char *) obstack_base (&scratch_obstack); | |
8d08fdba MS |
3481 | } |
3482 | ||
bd6dd845 | 3483 | static tree |
5566b478 MS |
3484 | classtype_mangled_name (t) |
3485 | tree t; | |
3486 | { | |
3487 | if (CLASSTYPE_TEMPLATE_INFO (t) | |
36a117a5 MM |
3488 | /* Specializations have already had their names set up in |
3489 | lookup_template_class. */ | |
9fbf56f7 MM |
3490 | && !CLASSTYPE_TEMPLATE_SPECIALIZATION (t)) |
3491 | { | |
3492 | tree tmpl = most_general_template (CLASSTYPE_TI_TEMPLATE (t)); | |
3493 | ||
36a117a5 MM |
3494 | /* For non-primary templates, the template parameters are |
3495 | implicit from their surrounding context. */ | |
9fbf56f7 MM |
3496 | if (PRIMARY_TEMPLATE_P (tmpl)) |
3497 | { | |
3498 | tree name = DECL_NAME (tmpl); | |
3499 | char *mangled_name = mangle_class_name_for_template | |
3500 | (IDENTIFIER_POINTER (name), | |
3501 | DECL_INNERMOST_TEMPLATE_PARMS (tmpl), | |
3502 | CLASSTYPE_TI_ARGS (t)); | |
3503 | tree id = get_identifier (mangled_name); | |
3504 | IDENTIFIER_TEMPLATE (id) = name; | |
3505 | return id; | |
3506 | } | |
5566b478 | 3507 | } |
9fbf56f7 MM |
3508 | |
3509 | return TYPE_IDENTIFIER (t); | |
5566b478 MS |
3510 | } |
3511 | ||
3512 | static void | |
3513 | add_pending_template (d) | |
3514 | tree d; | |
3515 | { | |
e92cc029 MS |
3516 | tree ti; |
3517 | ||
3518 | if (TREE_CODE_CLASS (TREE_CODE (d)) == 't') | |
3519 | ti = CLASSTYPE_TEMPLATE_INFO (d); | |
3520 | else | |
3521 | ti = DECL_TEMPLATE_INFO (d); | |
3522 | ||
824b9a4c | 3523 | if (TI_PENDING_TEMPLATE_FLAG (ti)) |
5566b478 MS |
3524 | return; |
3525 | ||
3526 | *template_tail = perm_tree_cons | |
1139b3d8 | 3527 | (build_srcloc_here (), d, NULL_TREE); |
5566b478 | 3528 | template_tail = &TREE_CHAIN (*template_tail); |
824b9a4c | 3529 | TI_PENDING_TEMPLATE_FLAG (ti) = 1; |
5566b478 MS |
3530 | } |
3531 | ||
386b8a85 JM |
3532 | |
3533 | /* Return a TEMPLATE_ID_EXPR corresponding to the indicated FNS (which | |
3534 | may be either a _DECL or an overloaded function or an | |
3535 | IDENTIFIER_NODE), and ARGLIST. */ | |
3536 | ||
3537 | tree | |
3538 | lookup_template_function (fns, arglist) | |
3539 | tree fns, arglist; | |
3540 | { | |
2c73f9f5 | 3541 | tree type; |
050367a3 | 3542 | |
386b8a85 JM |
3543 | if (fns == NULL_TREE) |
3544 | { | |
8251199e | 3545 | cp_error ("non-template used as template"); |
386b8a85 JM |
3546 | return error_mark_node; |
3547 | } | |
3548 | ||
2c73f9f5 ML |
3549 | type = TREE_TYPE (fns); |
3550 | if (TREE_CODE (fns) == OVERLOAD || !type) | |
3551 | type = unknown_type_node; | |
3552 | ||
672476cb MM |
3553 | if (processing_template_decl) |
3554 | return build_min (TEMPLATE_ID_EXPR, type, fns, arglist); | |
3555 | else | |
3556 | return build (TEMPLATE_ID_EXPR, type, fns, arglist); | |
386b8a85 JM |
3557 | } |
3558 | ||
a2b60a0e MM |
3559 | /* Within the scope of a template class S<T>, the name S gets bound |
3560 | (in build_self_reference) to a TYPE_DECL for the class, not a | |
3561 | TEMPLATE_DECL. If DECL is a TYPE_DECL for current_class_type, | |
3562 | or one of its enclosing classes, and that type is a template, | |
3563 | return the associated TEMPLATE_DECL. Otherwise, the original | |
3564 | DECL is returned. */ | |
3565 | ||
e9659ab0 | 3566 | static tree |
a2b60a0e MM |
3567 | maybe_get_template_decl_from_type_decl (decl) |
3568 | tree decl; | |
3569 | { | |
3570 | return (decl != NULL_TREE | |
3571 | && TREE_CODE (decl) == TYPE_DECL | |
3572 | && DECL_ARTIFICIAL (decl) | |
3573 | && CLASSTYPE_TEMPLATE_INFO (TREE_TYPE (decl))) | |
3574 | ? CLASSTYPE_TI_TEMPLATE (TREE_TYPE (decl)) : decl; | |
3575 | } | |
386b8a85 | 3576 | |
8d08fdba MS |
3577 | /* Given an IDENTIFIER_NODE (type TEMPLATE_DECL) and a chain of |
3578 | parameters, find the desired type. | |
3579 | ||
3580 | D1 is the PTYPENAME terminal, and ARGLIST is the list of arguments. | |
36a117a5 MM |
3581 | (Actually ARGLIST may be either a TREE_LIST or a TREE_VEC. It will |
3582 | be a TREE_LIST if called directly from the parser, and a TREE_VEC | |
3583 | otherwise.) Since ARGLIST is build on the decl_obstack, we must | |
3584 | copy it here to keep it from being reclaimed when the decl storage | |
3585 | is reclaimed. | |
8d08fdba MS |
3586 | |
3587 | IN_DECL, if non-NULL, is the template declaration we are trying to | |
75650646 MM |
3588 | instantiate. |
3589 | ||
36a117a5 MM |
3590 | If ENTERING_SCOPE is non-zero, we are about to enter the scope of |
3591 | the class we are looking up. | |
3592 | ||
75650646 MM |
3593 | If the template class is really a local class in a template |
3594 | function, then the FUNCTION_CONTEXT is the function in which it is | |
3595 | being instantiated. */ | |
e92cc029 | 3596 | |
8d08fdba | 3597 | tree |
36a117a5 | 3598 | lookup_template_class (d1, arglist, in_decl, context, entering_scope) |
8d08fdba MS |
3599 | tree d1, arglist; |
3600 | tree in_decl; | |
e1467ff2 | 3601 | tree context; |
36a117a5 | 3602 | int entering_scope; |
8d08fdba | 3603 | { |
a703fb38 | 3604 | tree template = NULL_TREE, parmlist; |
dbfe2124 | 3605 | tree t; |
5566b478 MS |
3606 | |
3607 | if (TREE_CODE (d1) == IDENTIFIER_NODE) | |
3608 | { | |
f181d4ae MM |
3609 | if (IDENTIFIER_VALUE (d1) |
3610 | && DECL_TEMPLATE_TEMPLATE_PARM_P (IDENTIFIER_VALUE (d1))) | |
3611 | template = IDENTIFIER_VALUE (d1); | |
73b0fce8 KL |
3612 | else |
3613 | { | |
2c73f9f5 ML |
3614 | if (context) |
3615 | push_decl_namespace (context); | |
67ffc812 | 3616 | if (current_class_type != NULL_TREE) |
7ac7b28f | 3617 | template = |
67ffc812 | 3618 | maybe_get_template_decl_from_type_decl |
744aa133 | 3619 | (IDENTIFIER_CLASS_VALUE (d1)); |
a2b60a0e | 3620 | if (template == NULL_TREE) |
2c73f9f5 ML |
3621 | template = lookup_name_nonclass (d1); |
3622 | if (context) | |
3623 | pop_decl_namespace (); | |
73b0fce8 | 3624 | } |
8d019cef JM |
3625 | if (template) |
3626 | context = DECL_CONTEXT (template); | |
5566b478 | 3627 | } |
c91a56d2 MS |
3628 | else if (TREE_CODE (d1) == TYPE_DECL && IS_AGGR_TYPE (TREE_TYPE (d1))) |
3629 | { | |
802dbc34 JM |
3630 | tree type = TREE_TYPE (d1); |
3631 | ||
3632 | /* If we are declaring a constructor, say A<T>::A<T>, we will get | |
3633 | an implicit typename for the second A. Deal with it. */ | |
3634 | if (TREE_CODE (type) == TYPENAME_TYPE && TREE_TYPE (type)) | |
3635 | type = TREE_TYPE (type); | |
3636 | ||
3637 | if (CLASSTYPE_TEMPLATE_INFO (type)) | |
f3400fe2 | 3638 | { |
802dbc34 | 3639 | template = CLASSTYPE_TI_TEMPLATE (type); |
f3400fe2 JM |
3640 | d1 = DECL_NAME (template); |
3641 | } | |
c91a56d2 | 3642 | } |
ed44da02 MM |
3643 | else if (TREE_CODE (d1) == ENUMERAL_TYPE |
3644 | || (TREE_CODE_CLASS (TREE_CODE (d1)) == 't' | |
3645 | && IS_AGGR_TYPE (d1))) | |
5566b478 | 3646 | { |
ed44da02 | 3647 | template = TYPE_TI_TEMPLATE (d1); |
5566b478 MS |
3648 | d1 = DECL_NAME (template); |
3649 | } | |
93cdc044 JM |
3650 | else if (TREE_CODE (d1) == TEMPLATE_DECL |
3651 | && TREE_CODE (DECL_RESULT (d1)) == TYPE_DECL) | |
3652 | { | |
3653 | template = d1; | |
3654 | d1 = DECL_NAME (template); | |
3655 | context = DECL_CONTEXT (template); | |
3656 | } | |
5566b478 MS |
3657 | else |
3658 | my_friendly_abort (272); | |
8d08fdba | 3659 | |
8d08fdba | 3660 | /* With something like `template <class T> class X class X { ... };' |
f181d4ae MM |
3661 | we could end up with D1 having nothing but an IDENTIFIER_VALUE. |
3662 | We don't want to do that, but we have to deal with the situation, | |
3663 | so let's give them some syntax errors to chew on instead of a | |
3664 | crash. */ | |
8d08fdba | 3665 | if (! template) |
f3400fe2 JM |
3666 | { |
3667 | cp_error ("`%T' is not a template", d1); | |
3668 | return error_mark_node; | |
3669 | } | |
2c73f9f5 | 3670 | |
c3baf4b5 JM |
3671 | if (context == NULL_TREE) |
3672 | context = global_namespace; | |
2c73f9f5 | 3673 | |
8d08fdba MS |
3674 | if (TREE_CODE (template) != TEMPLATE_DECL) |
3675 | { | |
8251199e | 3676 | cp_error ("non-template type `%T' used as a template", d1); |
8d08fdba | 3677 | if (in_decl) |
8251199e | 3678 | cp_error_at ("for template declaration `%D'", in_decl); |
8d08fdba MS |
3679 | return error_mark_node; |
3680 | } | |
8d08fdba | 3681 | |
73b0fce8 KL |
3682 | if (DECL_TEMPLATE_TEMPLATE_PARM_P (template)) |
3683 | { | |
3684 | /* Create a new TEMPLATE_DECL and TEMPLATE_TEMPLATE_PARM node to store | |
3685 | template arguments */ | |
3686 | ||
3687 | tree parm = copy_template_template_parm (TREE_TYPE (template)); | |
3688 | tree template2 = TYPE_STUB_DECL (parm); | |
3689 | tree arglist2; | |
3690 | ||
73b0fce8 KL |
3691 | parmlist = DECL_INNERMOST_TEMPLATE_PARMS (template); |
3692 | ||
744fac59 | 3693 | arglist2 = coerce_template_parms (parmlist, arglist, template, 1, 1); |
73b0fce8 KL |
3694 | if (arglist2 == error_mark_node) |
3695 | return error_mark_node; | |
3696 | ||
3697 | arglist2 = copy_to_permanent (arglist2); | |
7ddedda4 | 3698 | TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (parm) |
73b0fce8 KL |
3699 | = perm_tree_cons (template2, arglist2, NULL_TREE); |
3700 | TYPE_SIZE (parm) = 0; | |
3701 | return parm; | |
3702 | } | |
36a117a5 | 3703 | else |
8d08fdba | 3704 | { |
36a117a5 | 3705 | tree template_type = TREE_TYPE (template); |
7ac7b28f | 3706 | tree gen_tmpl; |
36a117a5 MM |
3707 | tree type_decl; |
3708 | tree found = NULL_TREE; | |
3709 | int arg_depth; | |
3710 | int parm_depth; | |
dbfe2124 | 3711 | int is_partial_instantiation; |
830bfa74 | 3712 | |
7ac7b28f MM |
3713 | gen_tmpl = most_general_template (template); |
3714 | parmlist = DECL_TEMPLATE_PARMS (gen_tmpl); | |
36a117a5 MM |
3715 | parm_depth = TMPL_PARMS_DEPTH (parmlist); |
3716 | arg_depth = TMPL_ARGS_DEPTH (arglist); | |
3717 | ||
7ddedda4 MM |
3718 | /* We build up the coerced arguments and such on the |
3719 | momentary_obstack. */ | |
3720 | push_momentary (); | |
3721 | ||
36a117a5 MM |
3722 | if (arg_depth == 1 && parm_depth > 1) |
3723 | { | |
39c01e4c | 3724 | /* We've been given an incomplete set of template arguments. |
36a117a5 MM |
3725 | For example, given: |
3726 | ||
3727 | template <class T> struct S1 { | |
3728 | template <class U> struct S2 {}; | |
3729 | template <class U> struct S2<U*> {}; | |
3730 | }; | |
3731 | ||
3732 | we will be called with an ARGLIST of `U*', but the | |
3733 | TEMPLATE will be `template <class T> template | |
3734 | <class U> struct S1<T>::S2'. We must fill in the missing | |
3735 | arguments. */ | |
7ac7b28f MM |
3736 | arglist |
3737 | = add_outermost_template_args (TYPE_TI_ARGS (TREE_TYPE (template)), | |
3738 | arglist); | |
36a117a5 MM |
3739 | arg_depth = TMPL_ARGS_DEPTH (arglist); |
3740 | } | |
5566b478 | 3741 | |
7ac7b28f | 3742 | /* Now we should enough arguments. */ |
36a117a5 MM |
3743 | my_friendly_assert (parm_depth == arg_depth, 0); |
3744 | ||
7ac7b28f MM |
3745 | /* From here on, we're only interested in the most general |
3746 | template. */ | |
3747 | template = gen_tmpl; | |
3748 | ||
36a117a5 MM |
3749 | /* Calculate the BOUND_ARGS. These will be the args that are |
3750 | actually tsubst'd into the definition to create the | |
3751 | instantiation. */ | |
3752 | if (parm_depth > 1) | |
830bfa74 MM |
3753 | { |
3754 | /* We have multiple levels of arguments to coerce, at once. */ | |
830bfa74 | 3755 | int i; |
e4a84209 | 3756 | int saved_depth = TMPL_ARGS_DEPTH (arglist); |
36a117a5 | 3757 | |
cabc336a | 3758 | tree bound_args = make_temp_vec (parm_depth); |
830bfa74 | 3759 | |
e4a84209 | 3760 | for (i = saved_depth, |
830bfa74 | 3761 | t = DECL_TEMPLATE_PARMS (template); |
e4a84209 | 3762 | i > 0 && t != NULL_TREE; |
830bfa74 | 3763 | --i, t = TREE_CHAIN (t)) |
e4a84209 MM |
3764 | { |
3765 | tree a = coerce_template_parms (TREE_VALUE (t), | |
3766 | arglist, template, 1, 1); | |
3767 | SET_TMPL_ARGS_LEVEL (bound_args, i, a); | |
3768 | ||
3769 | /* We temporarily reduce the length of the ARGLIST so | |
3770 | that coerce_template_parms will see only the arguments | |
3771 | corresponding to the template parameters it is | |
3772 | examining. */ | |
3773 | TREE_VEC_LENGTH (arglist)--; | |
3774 | } | |
3775 | ||
3776 | /* Restore the ARGLIST to its full size. */ | |
3777 | TREE_VEC_LENGTH (arglist) = saved_depth; | |
3778 | ||
36a117a5 | 3779 | arglist = bound_args; |
830bfa74 MM |
3780 | } |
3781 | else | |
36a117a5 MM |
3782 | arglist |
3783 | = coerce_template_parms (INNERMOST_TEMPLATE_PARMS (parmlist), | |
3784 | innermost_args (arglist), | |
3785 | template, 1, 1); | |
3786 | ||
3787 | if (arglist == error_mark_node) | |
3788 | /* We were unable to bind the arguments. */ | |
5566b478 | 3789 | return error_mark_node; |
5566b478 | 3790 | |
36a117a5 MM |
3791 | /* In the scope of a template class, explicit references to the |
3792 | template class refer to the type of the template, not any | |
3793 | instantiation of it. For example, in: | |
3794 | ||
3795 | template <class T> class C { void f(C<T>); } | |
3796 | ||
3797 | the `C<T>' is just the same as `C'. Outside of the | |
3798 | class, however, such a reference is an instantiation. */ | |
ed44da02 | 3799 | if (comp_template_args (TYPE_TI_ARGS (template_type), |
36a117a5 MM |
3800 | arglist)) |
3801 | { | |
3802 | found = template_type; | |
3803 | ||
3804 | if (!entering_scope && PRIMARY_TEMPLATE_P (template)) | |
5566b478 | 3805 | { |
36a117a5 MM |
3806 | tree ctx; |
3807 | ||
3808 | /* Note that we use DECL_CONTEXT, rather than | |
3809 | CP_DECL_CONTEXT, so that the termination test is | |
3810 | always just `ctx'. We're not interested in namepace | |
3811 | scopes. */ | |
3812 | for (ctx = current_class_type; | |
3813 | ctx; | |
3814 | ctx = (TREE_CODE_CLASS (TREE_CODE (ctx)) == 't') | |
3815 | ? TYPE_CONTEXT (ctx) : DECL_CONTEXT (ctx)) | |
3bfdc719 | 3816 | if (same_type_p (ctx, template_type)) |
36a117a5 MM |
3817 | break; |
3818 | ||
3819 | if (!ctx) | |
3820 | /* We're not in the scope of the class, so the | |
3821 | TEMPLATE_TYPE is not the type we want after | |
3822 | all. */ | |
3823 | found = NULL_TREE; | |
5566b478 MS |
3824 | } |
3825 | } | |
36a117a5 MM |
3826 | |
3827 | if (!found) | |
75650646 | 3828 | { |
36a117a5 MM |
3829 | for (found = DECL_TEMPLATE_INSTANTIATIONS (template); |
3830 | found; found = TREE_CHAIN (found)) | |
3831 | if (comp_template_args (TREE_PURPOSE (found), arglist)) | |
3832 | break; | |
75650646 | 3833 | |
36a117a5 MM |
3834 | if (found) |
3835 | found = TREE_VALUE (found); | |
8d08fdba | 3836 | } |
36a117a5 MM |
3837 | |
3838 | if (found) | |
8d08fdba | 3839 | { |
7ddedda4 | 3840 | pop_momentary (); |
36a117a5 | 3841 | return found; |
8d08fdba | 3842 | } |
5566b478 | 3843 | |
36a117a5 MM |
3844 | /* Since we didn't find the type, we'll have to create it. |
3845 | Since we'll be saving this type on the | |
3846 | DECL_TEMPLATE_INSTANTIATIONS list, it must be permanent. */ | |
3847 | push_obstacks (&permanent_obstack, &permanent_obstack); | |
3848 | ||
dbfe2124 | 3849 | /* This type is a "partial instantiation" if any of the template |
486e4077 MM |
3850 | arguments still inolve template parameters. Note that we set |
3851 | IS_PARTIAL_INSTANTIATION for partial specializations as | |
3852 | well. */ | |
dbfe2124 MM |
3853 | is_partial_instantiation = uses_template_parms (arglist); |
3854 | ||
36a117a5 | 3855 | /* Create the type. */ |
ed44da02 MM |
3856 | if (TREE_CODE (template_type) == ENUMERAL_TYPE) |
3857 | { | |
dbfe2124 | 3858 | if (!is_partial_instantiation) |
61a127b3 | 3859 | t = start_enum (TYPE_IDENTIFIER (template_type)); |
ed44da02 | 3860 | else |
dbfe2124 | 3861 | /* We don't want to call start_enum for this type, since |
ed44da02 MM |
3862 | the values for the enumeration constants may involve |
3863 | template parameters. And, no one should be interested | |
3864 | in the enumeration constants for such a type. */ | |
3865 | t = make_node (ENUMERAL_TYPE); | |
3866 | } | |
3867 | else | |
3868 | { | |
3869 | t = make_lang_type (TREE_CODE (template_type)); | |
3870 | CLASSTYPE_DECLARED_CLASS (t) | |
3871 | = CLASSTYPE_DECLARED_CLASS (template_type); | |
3872 | CLASSTYPE_GOT_SEMICOLON (t) = 1; | |
3873 | SET_CLASSTYPE_IMPLICIT_INSTANTIATION (t); | |
f668f160 | 3874 | TYPE_FOR_JAVA (t) = TYPE_FOR_JAVA (template_type); |
ed44da02 MM |
3875 | } |
3876 | ||
61a127b3 | 3877 | /* If we called start_enum above, this information will already |
ed44da02 MM |
3878 | be set up. */ |
3879 | if (!TYPE_NAME (t)) | |
3880 | { | |
3881 | TYPE_CONTEXT (t) = FROB_CONTEXT (context); | |
36a117a5 | 3882 | |
ed44da02 MM |
3883 | /* Create a stub TYPE_DECL for it. */ |
3884 | type_decl = build_decl (TYPE_DECL, DECL_NAME (template), t); | |
3885 | SET_DECL_ARTIFICIAL (type_decl); | |
3886 | DECL_CONTEXT (type_decl) = TYPE_CONTEXT (t); | |
3887 | DECL_SOURCE_FILE (type_decl) | |
3888 | = DECL_SOURCE_FILE (TYPE_STUB_DECL (template_type)); | |
3889 | DECL_SOURCE_LINE (type_decl) | |
3890 | = DECL_SOURCE_LINE (TYPE_STUB_DECL (template_type)); | |
3891 | TYPE_STUB_DECL (t) = TYPE_NAME (t) = type_decl; | |
3892 | } | |
3893 | else | |
3894 | type_decl = TYPE_NAME (t); | |
36a117a5 | 3895 | |
9fbf56f7 MM |
3896 | /* Set up the template information. We have to figure out which |
3897 | template is the immediate parent if this is a full | |
3898 | instantiation. */ | |
3899 | if (parm_depth == 1 || is_partial_instantiation | |
3900 | || !PRIMARY_TEMPLATE_P (template)) | |
3901 | /* This case is easy; there are no member templates involved. */ | |
3902 | found = template; | |
3903 | else | |
3904 | { | |
3905 | /* This is a full instantiation of a member template. There | |
3906 | should be some partial instantiation of which this is an | |
3907 | instance. */ | |
3908 | ||
3909 | for (found = DECL_TEMPLATE_INSTANTIATIONS (template); | |
3910 | found; found = TREE_CHAIN (found)) | |
3911 | { | |
3912 | int success; | |
3913 | tree tmpl = CLASSTYPE_TI_TEMPLATE (TREE_VALUE (found)); | |
3914 | ||
3915 | /* We only want partial instantiations, here, not | |
3916 | specializations or full instantiations. */ | |
3917 | if (CLASSTYPE_TEMPLATE_SPECIALIZATION (TREE_VALUE (found)) | |
3918 | || !uses_template_parms (TREE_VALUE (found))) | |
3919 | continue; | |
3920 | ||
3921 | /* Temporarily reduce by one the number of levels in the | |
3922 | ARGLIST and in FOUND so as to avoid comparing the | |
3923 | last set of arguments. */ | |
3924 | TREE_VEC_LENGTH (arglist)--; | |
3925 | TREE_VEC_LENGTH (TREE_PURPOSE (found)) --; | |
3926 | ||
3927 | /* See if the arguments match. If they do, then TMPL is | |
3928 | the partial instantiation we want. */ | |
3929 | success = comp_template_args (TREE_PURPOSE (found), arglist); | |
3930 | ||
3931 | /* Restore the argument vectors to their full size. */ | |
3932 | TREE_VEC_LENGTH (arglist)++; | |
3933 | TREE_VEC_LENGTH (TREE_PURPOSE (found))++; | |
3934 | ||
3935 | if (success) | |
3936 | { | |
3937 | found = tmpl; | |
3938 | break; | |
3939 | } | |
3940 | } | |
3941 | ||
3942 | if (!found) | |
3943 | my_friendly_abort (0); | |
3944 | } | |
3945 | ||
5566b478 | 3946 | arglist = copy_to_permanent (arglist); |
ed44da02 | 3947 | SET_TYPE_TEMPLATE_INFO (t, |
9fbf56f7 | 3948 | tree_cons (found, arglist, NULL_TREE)); |
dbfe2124 MM |
3949 | DECL_TEMPLATE_INSTANTIATIONS (template) |
3950 | = tree_cons (arglist, t, | |
3951 | DECL_TEMPLATE_INSTANTIATIONS (template)); | |
3952 | ||
3953 | if (TREE_CODE (t) == ENUMERAL_TYPE | |
3954 | && !is_partial_instantiation) | |
61a127b3 MM |
3955 | /* Now that the type has been registered on the instantiations |
3956 | list, we set up the enumerators. Because the enumeration | |
3957 | constants may involve the enumeration type itself, we make | |
3958 | sure to register the type first, and then create the | |
3959 | constants. That way, doing tsubst_expr for the enumeration | |
3960 | constants won't result in recursive calls here; we'll find | |
3961 | the instantiation and exit above. */ | |
3962 | tsubst_enum (template_type, t, arglist); | |
dbfe2124 MM |
3963 | |
3964 | /* We're done with the permanent obstack, now. */ | |
3965 | pop_obstacks (); | |
7ddedda4 MM |
3966 | /* We're also done with the momentary allocation we started |
3967 | above. */ | |
3968 | pop_momentary (); | |
5566b478 | 3969 | |
36a117a5 MM |
3970 | /* Reset the name of the type, now that CLASSTYPE_TEMPLATE_INFO |
3971 | is set up. */ | |
ed44da02 MM |
3972 | if (TREE_CODE (t) != ENUMERAL_TYPE) |
3973 | DECL_NAME (type_decl) = classtype_mangled_name (t); | |
36a117a5 | 3974 | DECL_ASSEMBLER_NAME (type_decl) = DECL_NAME (type_decl); |
dbfe2124 | 3975 | if (!is_partial_instantiation) |
36a117a5 MM |
3976 | { |
3977 | DECL_ASSEMBLER_NAME (type_decl) | |
3978 | = get_identifier (build_overload_name (t, 1, 1)); | |
50a6dbd7 JM |
3979 | |
3980 | /* For backwards compatibility; code that uses | |
3981 | -fexternal-templates expects looking up a template to | |
3982 | instantiate it. I think DDD still relies on this. | |
3983 | (jason 8/20/1998) */ | |
ed44da02 MM |
3984 | if (TREE_CODE (t) != ENUMERAL_TYPE |
3985 | && flag_external_templates | |
36a117a5 MM |
3986 | && CLASSTYPE_INTERFACE_KNOWN (TREE_TYPE (template)) |
3987 | && ! CLASSTYPE_INTERFACE_ONLY (TREE_TYPE (template))) | |
3988 | add_pending_template (t); | |
3989 | } | |
3990 | else | |
077e7015 MM |
3991 | /* If the type makes use of template parameters, the |
3992 | code that generates debugging information will crash. */ | |
3993 | DECL_IGNORED_P (TYPE_STUB_DECL (t)) = 1; | |
8d08fdba | 3994 | |
36a117a5 MM |
3995 | return t; |
3996 | } | |
8d08fdba MS |
3997 | } |
3998 | \f | |
050367a3 MM |
3999 | /* For each TEMPLATE_TYPE_PARM, TEMPLATE_TEMPLATE_PARM, or |
4000 | TEMPLATE_PARM_INDEX in T, call FN with the parameter and the DATA. | |
4001 | If FN returns non-zero, the iteration is terminated, and | |
4002 | for_each_template_parm returns 1. Otherwise, the iteration | |
4003 | continues. If FN never returns a non-zero value, the value | |
4004 | returned by for_each_template_parm is 0. If FN is NULL, it is | |
4005 | considered to be the function which always returns 1. */ | |
4006 | ||
e9659ab0 | 4007 | static int |
050367a3 | 4008 | for_each_template_parm (t, fn, data) |
8d08fdba | 4009 | tree t; |
050367a3 MM |
4010 | tree_fn_t fn; |
4011 | void* data; | |
8d08fdba MS |
4012 | { |
4013 | if (!t) | |
4014 | return 0; | |
581d38d0 MM |
4015 | |
4016 | if (TREE_CODE_CLASS (TREE_CODE (t)) == 't' | |
4017 | && for_each_template_parm (TYPE_CONTEXT (t), fn, data)) | |
4018 | return 1; | |
4019 | ||
8d08fdba MS |
4020 | switch (TREE_CODE (t)) |
4021 | { | |
297e73d8 | 4022 | case ARRAY_REF: |
05e0b2f4 | 4023 | case OFFSET_REF: |
297e73d8 MM |
4024 | return (for_each_template_parm (TREE_OPERAND (t, 0), fn, data) |
4025 | || for_each_template_parm (TREE_OPERAND (t, 1), fn, data)); | |
4026 | ||
8d08fdba MS |
4027 | case IDENTIFIER_NODE: |
4028 | if (!IDENTIFIER_TEMPLATE (t)) | |
4029 | return 0; | |
5566b478 | 4030 | my_friendly_abort (42); |
8d08fdba MS |
4031 | |
4032 | /* aggregates of tree nodes */ | |
4033 | case TREE_VEC: | |
4034 | { | |
4035 | int i = TREE_VEC_LENGTH (t); | |
4036 | while (i--) | |
050367a3 | 4037 | if (for_each_template_parm (TREE_VEC_ELT (t, i), fn, data)) |
8d08fdba MS |
4038 | return 1; |
4039 | return 0; | |
4040 | } | |
4041 | case TREE_LIST: | |
050367a3 MM |
4042 | if (for_each_template_parm (TREE_PURPOSE (t), fn, data) |
4043 | || for_each_template_parm (TREE_VALUE (t), fn, data)) | |
8d08fdba | 4044 | return 1; |
050367a3 | 4045 | return for_each_template_parm (TREE_CHAIN (t), fn, data); |
8d08fdba | 4046 | |
2c73f9f5 ML |
4047 | case OVERLOAD: |
4048 | if (for_each_template_parm (OVL_FUNCTION (t), fn, data)) | |
4049 | return 1; | |
4050 | return for_each_template_parm (OVL_CHAIN (t), fn, data); | |
4051 | ||
8d08fdba MS |
4052 | /* constructed type nodes */ |
4053 | case POINTER_TYPE: | |
4054 | case REFERENCE_TYPE: | |
050367a3 | 4055 | return for_each_template_parm (TREE_TYPE (t), fn, data); |
ed44da02 | 4056 | |
8d08fdba | 4057 | case RECORD_TYPE: |
b7484fbe | 4058 | if (TYPE_PTRMEMFUNC_FLAG (t)) |
050367a3 MM |
4059 | return for_each_template_parm (TYPE_PTRMEMFUNC_FN_TYPE (t), |
4060 | fn, data); | |
ed44da02 MM |
4061 | /* Fall through. */ |
4062 | ||
8d08fdba | 4063 | case UNION_TYPE: |
ed44da02 MM |
4064 | case ENUMERAL_TYPE: |
4065 | if (! TYPE_TEMPLATE_INFO (t)) | |
8d08fdba | 4066 | return 0; |
050367a3 | 4067 | return for_each_template_parm (TREE_VALUE |
ed44da02 | 4068 | (TYPE_TEMPLATE_INFO (t)), |
050367a3 | 4069 | fn, data); |
588c2d1c MM |
4070 | case METHOD_TYPE: |
4071 | if (for_each_template_parm (TYPE_METHOD_BASETYPE (t), fn, data)) | |
8d08fdba | 4072 | return 1; |
588c2d1c MM |
4073 | /* Fall through. */ |
4074 | ||
4075 | case FUNCTION_TYPE: | |
4076 | /* Check the parameter types. Since default arguments are not | |
4077 | instantiated until they are needed, the TYPE_ARG_TYPES may | |
4078 | contain expressions that involve template parameters. But, | |
4079 | no-one should be looking at them yet. And, once they're | |
4080 | instantiated, they don't contain template parameters, so | |
4081 | there's no point in looking at them then, either. */ | |
4082 | { | |
4083 | tree parm; | |
4084 | ||
4085 | for (parm = TYPE_ARG_TYPES (t); parm; parm = TREE_CHAIN (parm)) | |
4086 | if (for_each_template_parm (TREE_VALUE (parm), fn, data)) | |
4087 | return 1; | |
4088 | } | |
4089 | ||
4090 | /* Check the return type, too. */ | |
050367a3 | 4091 | return for_each_template_parm (TREE_TYPE (t), fn, data); |
588c2d1c | 4092 | |
8d08fdba | 4093 | case ARRAY_TYPE: |
050367a3 | 4094 | if (for_each_template_parm (TYPE_DOMAIN (t), fn, data)) |
8d08fdba | 4095 | return 1; |
050367a3 | 4096 | return for_each_template_parm (TREE_TYPE (t), fn, data); |
8d08fdba | 4097 | case OFFSET_TYPE: |
050367a3 | 4098 | if (for_each_template_parm (TYPE_OFFSET_BASETYPE (t), fn, data)) |
8d08fdba | 4099 | return 1; |
050367a3 | 4100 | return for_each_template_parm (TREE_TYPE (t), fn, data); |
8d08fdba MS |
4101 | |
4102 | /* decl nodes */ | |
4103 | case TYPE_DECL: | |
050367a3 | 4104 | return for_each_template_parm (TREE_TYPE (t), fn, data); |
5566b478 | 4105 | |
73b0fce8 KL |
4106 | case TEMPLATE_DECL: |
4107 | /* A template template parameter is encountered */ | |
4108 | if (DECL_TEMPLATE_TEMPLATE_PARM_P (t)) | |
744fac59 KL |
4109 | return for_each_template_parm (TREE_TYPE (t), fn, data); |
4110 | /* Already substituted template template parameter */ | |
73b0fce8 KL |
4111 | return 0; |
4112 | ||
3ac3d9ea | 4113 | case CONST_DECL: |
050367a3 | 4114 | if (for_each_template_parm (DECL_INITIAL (t), fn, data)) |
3ac3d9ea MM |
4115 | return 1; |
4116 | goto check_type_and_context; | |
4117 | ||
8d08fdba | 4118 | case FUNCTION_DECL: |
5566b478 MS |
4119 | case VAR_DECL: |
4120 | /* ??? What about FIELD_DECLs? */ | |
4121 | if (DECL_LANG_SPECIFIC (t) && DECL_TEMPLATE_INFO (t) | |
050367a3 | 4122 | && for_each_template_parm (DECL_TI_ARGS (t), fn, data)) |
8d08fdba MS |
4123 | return 1; |
4124 | /* fall through */ | |
8d08fdba | 4125 | case PARM_DECL: |
3ac3d9ea | 4126 | check_type_and_context: |
050367a3 | 4127 | if (for_each_template_parm (TREE_TYPE (t), fn, data)) |
5566b478 | 4128 | return 1; |
050367a3 MM |
4129 | if (DECL_CONTEXT (t) |
4130 | && for_each_template_parm (DECL_CONTEXT (t), fn, data)) | |
8d08fdba | 4131 | return 1; |
8d08fdba MS |
4132 | return 0; |
4133 | ||
4134 | case CALL_EXPR: | |
297e73d8 MM |
4135 | return (for_each_template_parm (TREE_OPERAND (t, 0), fn, data) |
4136 | || for_each_template_parm (TREE_OPERAND (t, 1), fn, data)); | |
4137 | ||
8d08fdba | 4138 | case ADDR_EXPR: |
050367a3 | 4139 | return for_each_template_parm (TREE_OPERAND (t, 0), fn, data); |
8d08fdba MS |
4140 | |
4141 | /* template parm nodes */ | |
73b0fce8 | 4142 | case TEMPLATE_TEMPLATE_PARM: |
744fac59 | 4143 | /* Record template parameters such as `T' inside `TT<T>'. */ |
7ddedda4 MM |
4144 | if (TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (t) |
4145 | && for_each_template_parm (TYPE_TI_ARGS (t), fn, data)) | |
744fac59 KL |
4146 | return 1; |
4147 | case TEMPLATE_TYPE_PARM: | |
f84b4be9 | 4148 | case TEMPLATE_PARM_INDEX: |
050367a3 MM |
4149 | if (fn) |
4150 | return (*fn)(t, data); | |
4151 | else | |
4152 | return 1; | |
8d08fdba MS |
4153 | |
4154 | /* simple type nodes */ | |
4155 | case INTEGER_TYPE: | |
050367a3 | 4156 | if (for_each_template_parm (TYPE_MIN_VALUE (t), fn, data)) |
8d08fdba | 4157 | return 1; |
050367a3 | 4158 | return for_each_template_parm (TYPE_MAX_VALUE (t), fn, data); |
8d08fdba MS |
4159 | |
4160 | case REAL_TYPE: | |
37c46b43 | 4161 | case COMPLEX_TYPE: |
8d08fdba | 4162 | case VOID_TYPE: |
2986ae00 | 4163 | case BOOLEAN_TYPE: |
2c73f9f5 | 4164 | case NAMESPACE_DECL: |
8d08fdba MS |
4165 | return 0; |
4166 | ||
4167 | /* constants */ | |
4168 | case INTEGER_CST: | |
4169 | case REAL_CST: | |
4170 | case STRING_CST: | |
4171 | return 0; | |
4172 | ||
4173 | case ERROR_MARK: | |
4174 | /* Non-error_mark_node ERROR_MARKs are bad things. */ | |
4175 | my_friendly_assert (t == error_mark_node, 274); | |
4176 | /* NOTREACHED */ | |
4177 | return 0; | |
4178 | ||
61a127b3 MM |
4179 | case PTRMEM_CST: |
4180 | return for_each_template_parm (TREE_TYPE (t), fn, data); | |
4181 | ||
5156628f | 4182 | case SCOPE_REF: |
050367a3 | 4183 | return for_each_template_parm (TREE_OPERAND (t, 0), fn, data); |
5156628f | 4184 | |
db5ae43f MS |
4185 | case CONSTRUCTOR: |
4186 | if (TREE_TYPE (t) && TYPE_PTRMEMFUNC_P (TREE_TYPE (t))) | |
050367a3 MM |
4187 | return for_each_template_parm (TYPE_PTRMEMFUNC_FN_TYPE |
4188 | (TREE_TYPE (t)), fn, data); | |
4189 | return for_each_template_parm (TREE_OPERAND (t, 1), fn, data); | |
db5ae43f | 4190 | |
b8865407 MM |
4191 | case SIZEOF_EXPR: |
4192 | case ALIGNOF_EXPR: | |
4193 | return for_each_template_parm (TREE_OPERAND (t, 0), fn, data); | |
4194 | ||
4195 | case INDIRECT_REF: | |
4196 | case COMPONENT_REF: | |
4197 | /* We assume that the object must be instantiated in order to build | |
4198 | the COMPONENT_REF, so we test only whether the type of the | |
4199 | COMPONENT_REF uses template parms. On the other hand, if | |
4200 | there's no type, then this thing must be some expression | |
4201 | involving template parameters. */ | |
4202 | if (TREE_TYPE (t)) | |
4203 | return for_each_template_parm (TREE_TYPE (t), fn, data); | |
4204 | /* Fall through. */ | |
4205 | ||
42976354 BK |
4206 | case MODOP_EXPR: |
4207 | case CAST_EXPR: | |
4208 | case REINTERPRET_CAST_EXPR: | |
4209 | case CONST_CAST_EXPR: | |
4210 | case STATIC_CAST_EXPR: | |
4211 | case DYNAMIC_CAST_EXPR: | |
42976354 BK |
4212 | case ARROW_EXPR: |
4213 | case DOTSTAR_EXPR: | |
4214 | case TYPEID_EXPR: | |
b8865407 MM |
4215 | case LOOKUP_EXPR: |
4216 | case TYPENAME_TYPE: | |
4217 | if (!fn) | |
4218 | return 1; | |
4219 | /* Fall through. */ | |
abff8e06 | 4220 | |
8d08fdba MS |
4221 | default: |
4222 | switch (TREE_CODE_CLASS (TREE_CODE (t))) | |
4223 | { | |
4224 | case '1': | |
4225 | case '2': | |
ec255269 | 4226 | case 'e': |
8d08fdba MS |
4227 | case '<': |
4228 | { | |
4229 | int i; | |
bbc06b4b | 4230 | for (i = first_rtl_op (TREE_CODE (t)); --i >= 0;) |
050367a3 | 4231 | if (for_each_template_parm (TREE_OPERAND (t, i), fn, data)) |
8d08fdba MS |
4232 | return 1; |
4233 | return 0; | |
4234 | } | |
4235 | default: | |
4236 | break; | |
4237 | } | |
4238 | sorry ("testing %s for template parms", | |
4239 | tree_code_name [(int) TREE_CODE (t)]); | |
4240 | my_friendly_abort (82); | |
4241 | /* NOTREACHED */ | |
4242 | return 0; | |
4243 | } | |
4244 | } | |
4245 | ||
050367a3 MM |
4246 | int |
4247 | uses_template_parms (t) | |
4248 | tree t; | |
4249 | { | |
4250 | return for_each_template_parm (t, 0, 0); | |
4251 | } | |
4252 | ||
27fafc8d JM |
4253 | static struct tinst_level *current_tinst_level; |
4254 | static struct tinst_level *free_tinst_level; | |
4255 | static int tinst_depth; | |
e9f32eb5 | 4256 | extern int max_tinst_depth; |
5566b478 | 4257 | #ifdef GATHER_STATISTICS |
27fafc8d | 4258 | int depth_reached; |
5566b478 | 4259 | #endif |
27fafc8d JM |
4260 | int tinst_level_tick; |
4261 | int last_template_error_tick; | |
8d08fdba | 4262 | |
7bae46f4 | 4263 | /* Print out all the template instantiations that we are currently |
27fafc8d JM |
4264 | working on. If ERR, we are being called from cp_thing, so do |
4265 | the right thing for an error message. */ | |
7bae46f4 | 4266 | |
27fafc8d JM |
4267 | static void |
4268 | print_template_context (err) | |
4269 | int err; | |
7bae46f4 JM |
4270 | { |
4271 | struct tinst_level *p = current_tinst_level; | |
4272 | int line = lineno; | |
4273 | char *file = input_filename; | |
4274 | ||
49e04385 | 4275 | if (err && p) |
27fafc8d | 4276 | { |
49e04385 MM |
4277 | if (current_function_decl != p->decl |
4278 | && current_function_decl != NULL_TREE) | |
4279 | /* We can get here during the processing of some synthesized | |
4280 | method. Then, p->decl will be the function that's causing | |
4281 | the synthesis. */ | |
4282 | ; | |
27fafc8d | 4283 | else |
27fafc8d | 4284 | { |
49e04385 MM |
4285 | if (current_function_decl == p->decl) |
4286 | /* Avoid redundancy with the the "In function" line. */; | |
4287 | else | |
4288 | fprintf (stderr, "%s: In instantiation of `%s':\n", | |
4289 | file, decl_as_string (p->decl, 0)); | |
4290 | ||
038fb86f JM |
4291 | line = p->line; |
4292 | file = p->file; | |
27fafc8d JM |
4293 | p = p->next; |
4294 | } | |
4295 | } | |
4296 | ||
7bae46f4 JM |
4297 | for (; p; p = p->next) |
4298 | { | |
038fb86f JM |
4299 | fprintf (stderr, "%s:%d: instantiated from `%s'\n", file, line, |
4300 | decl_as_string (p->decl, 0)); | |
4301 | line = p->line; | |
4302 | file = p->file; | |
7bae46f4 | 4303 | } |
038fb86f | 4304 | fprintf (stderr, "%s:%d: instantiated from here\n", file, line); |
7bae46f4 JM |
4305 | } |
4306 | ||
27fafc8d JM |
4307 | /* Called from cp_thing to print the template context for an error. */ |
4308 | ||
4309 | void | |
4310 | maybe_print_template_context () | |
4311 | { | |
4312 | if (last_template_error_tick == tinst_level_tick | |
4313 | || current_tinst_level == 0) | |
4314 | return; | |
4315 | ||
4316 | last_template_error_tick = tinst_level_tick; | |
4317 | print_template_context (1); | |
4318 | } | |
4319 | ||
bd6dd845 | 4320 | static int |
5566b478 MS |
4321 | push_tinst_level (d) |
4322 | tree d; | |
8d08fdba MS |
4323 | { |
4324 | struct tinst_level *new; | |
8d08fdba | 4325 | |
7215f9a0 MS |
4326 | if (tinst_depth >= max_tinst_depth) |
4327 | { | |
8adf5b5e JM |
4328 | /* If the instantiation in question still has unbound template parms, |
4329 | we don't really care if we can't instantiate it, so just return. | |
4330 | This happens with base instantiation for implicit `typename'. */ | |
4331 | if (uses_template_parms (d)) | |
4332 | return 0; | |
4333 | ||
1139b3d8 | 4334 | last_template_error_tick = tinst_level_tick; |
8251199e | 4335 | error ("template instantiation depth exceeds maximum of %d", |
7215f9a0 | 4336 | max_tinst_depth); |
8251199e JM |
4337 | error (" (use -ftemplate-depth-NN to increase the maximum)"); |
4338 | cp_error (" instantiating `%D'", d); | |
5566b478 | 4339 | |
27fafc8d | 4340 | print_template_context (0); |
5566b478 | 4341 | |
7215f9a0 MS |
4342 | return 0; |
4343 | } | |
4344 | ||
8d08fdba MS |
4345 | if (free_tinst_level) |
4346 | { | |
4347 | new = free_tinst_level; | |
4348 | free_tinst_level = new->next; | |
4349 | } | |
4350 | else | |
4351 | new = (struct tinst_level *) xmalloc (sizeof (struct tinst_level)); | |
4352 | ||
5566b478 MS |
4353 | new->decl = d; |
4354 | new->line = lineno; | |
4355 | new->file = input_filename; | |
8d08fdba MS |
4356 | new->next = current_tinst_level; |
4357 | current_tinst_level = new; | |
5566b478 | 4358 | |
7215f9a0 | 4359 | ++tinst_depth; |
5566b478 MS |
4360 | #ifdef GATHER_STATISTICS |
4361 | if (tinst_depth > depth_reached) | |
4362 | depth_reached = tinst_depth; | |
4363 | #endif | |
4364 | ||
27fafc8d | 4365 | ++tinst_level_tick; |
7215f9a0 | 4366 | return 1; |
8d08fdba MS |
4367 | } |
4368 | ||
4369 | void | |
4370 | pop_tinst_level () | |
4371 | { | |
4372 | struct tinst_level *old = current_tinst_level; | |
4373 | ||
ae58fa02 MM |
4374 | /* Restore the filename and line number stashed away when we started |
4375 | this instantiation. */ | |
4376 | lineno = old->line; | |
4377 | input_filename = old->file; | |
5f2c99c4 | 4378 | extract_interface_info (); |
ae58fa02 | 4379 | |
8d08fdba MS |
4380 | current_tinst_level = old->next; |
4381 | old->next = free_tinst_level; | |
4382 | free_tinst_level = old; | |
7215f9a0 | 4383 | --tinst_depth; |
27fafc8d | 4384 | ++tinst_level_tick; |
8d08fdba MS |
4385 | } |
4386 | ||
4387 | struct tinst_level * | |
4388 | tinst_for_decl () | |
4389 | { | |
4390 | struct tinst_level *p = current_tinst_level; | |
4391 | ||
4392 | if (p) | |
4393 | for (; p->next ; p = p->next ) | |
4394 | ; | |
4395 | return p; | |
4396 | } | |
4397 | ||
f84b4be9 JM |
4398 | /* DECL is a friend FUNCTION_DECL or TEMPLATE_DECL. ARGS is the |
4399 | vector of template arguments, as for tsubst. | |
4400 | ||
4401 | Returns an appropriate tsbust'd friend declaration. */ | |
4402 | ||
4403 | static tree | |
4404 | tsubst_friend_function (decl, args) | |
4405 | tree decl; | |
4406 | tree args; | |
4407 | { | |
4408 | tree new_friend; | |
27fafc8d JM |
4409 | int line = lineno; |
4410 | char *file = input_filename; | |
4411 | ||
4412 | lineno = DECL_SOURCE_LINE (decl); | |
4413 | input_filename = DECL_SOURCE_FILE (decl); | |
4414 | ||
f84b4be9 JM |
4415 | if (TREE_CODE (decl) == FUNCTION_DECL |
4416 | && DECL_TEMPLATE_INSTANTIATION (decl) | |
4417 | && TREE_CODE (DECL_TI_TEMPLATE (decl)) != TEMPLATE_DECL) | |
4418 | /* This was a friend declared with an explicit template | |
4419 | argument list, e.g.: | |
4420 | ||
4421 | friend void f<>(T); | |
4422 | ||
4423 | to indicate that f was a template instantiation, not a new | |
4424 | function declaration. Now, we have to figure out what | |
4425 | instantiation of what template. */ | |
4426 | { | |
4427 | tree template_id; | |
4428 | tree new_args; | |
4429 | tree tmpl; | |
f84b4be9 JM |
4430 | |
4431 | template_id | |
4432 | = lookup_template_function (tsubst_expr (DECL_TI_TEMPLATE (decl), | |
4393e105 MM |
4433 | args, /*complain=*/1, |
4434 | NULL_TREE), | |
f84b4be9 | 4435 | tsubst (DECL_TI_ARGS (decl), |
4393e105 MM |
4436 | args, /*complain=*/1, |
4437 | NULL_TREE)); | |
39c01e4c MM |
4438 | /* FIXME: The decl we create via the next tsubst could be |
4439 | created on a temporary obstack. */ | |
4393e105 | 4440 | new_friend = tsubst (decl, args, /*complain=*/1, NULL_TREE); |
36a117a5 MM |
4441 | tmpl = determine_specialization (template_id, new_friend, |
4442 | &new_args, | |
bf8f3f93 | 4443 | /*need_member_template=*/0); |
27fafc8d JM |
4444 | new_friend = instantiate_template (tmpl, new_args); |
4445 | goto done; | |
f84b4be9 | 4446 | } |
36a117a5 | 4447 | |
4393e105 | 4448 | new_friend = tsubst (decl, args, /*complain=*/1, NULL_TREE); |
f84b4be9 | 4449 | |
36a117a5 | 4450 | /* The NEW_FRIEND will look like an instantiation, to the |
f84b4be9 JM |
4451 | compiler, but is not an instantiation from the point of view of |
4452 | the language. For example, we might have had: | |
4453 | ||
4454 | template <class T> struct S { | |
4455 | template <class U> friend void f(T, U); | |
4456 | }; | |
4457 | ||
4458 | Then, in S<int>, template <class U> void f(int, U) is not an | |
4459 | instantiation of anything. */ | |
4460 | DECL_USE_TEMPLATE (new_friend) = 0; | |
4461 | if (TREE_CODE (decl) == TEMPLATE_DECL) | |
4462 | DECL_USE_TEMPLATE (DECL_TEMPLATE_RESULT (new_friend)) = 0; | |
36a117a5 MM |
4463 | |
4464 | /* The mangled name for the NEW_FRIEND is incorrect. The call to | |
4465 | tsubst will have resulted in a call to | |
4466 | set_mangled_name_for_template_decl. But, the function is not a | |
4467 | template instantiation and should not be mangled like one. | |
4468 | Therefore, we remangle the function name. We don't have to do | |
4469 | this if the NEW_FRIEND is a template since | |
4470 | set_mangled_name_for_template_decl doesn't do anything if the | |
4471 | function declaration still uses template arguments. */ | |
4472 | if (TREE_CODE (new_friend) != TEMPLATE_DECL) | |
4473 | { | |
4474 | set_mangled_name_for_decl (new_friend); | |
4475 | DECL_RTL (new_friend) = 0; | |
4476 | make_decl_rtl (new_friend, NULL_PTR, 1); | |
4477 | } | |
4478 | ||
6eb3bb27 | 4479 | if (DECL_NAMESPACE_SCOPE_P (new_friend)) |
f84b4be9 | 4480 | { |
36a117a5 | 4481 | tree old_decl; |
fbf1c34b MM |
4482 | tree new_friend_template_info; |
4483 | tree new_friend_result_template_info; | |
4484 | int new_friend_is_defn; | |
4485 | ||
4486 | /* We must save some information from NEW_FRIEND before calling | |
4487 | duplicate decls since that function will free NEW_FRIEND if | |
4488 | possible. */ | |
4489 | new_friend_template_info = DECL_TEMPLATE_INFO (new_friend); | |
f84b4be9 | 4490 | if (TREE_CODE (new_friend) == TEMPLATE_DECL) |
fbf1c34b MM |
4491 | { |
4492 | /* This declaration is a `primary' template. */ | |
4493 | DECL_PRIMARY_TEMPLATE (new_friend) = new_friend; | |
4494 | ||
4495 | new_friend_is_defn | |
4496 | = DECL_INITIAL (DECL_RESULT (new_friend)) != NULL_TREE; | |
4497 | new_friend_result_template_info | |
4498 | = DECL_TEMPLATE_INFO (DECL_RESULT (new_friend)); | |
4499 | } | |
4500 | else | |
4501 | { | |
4502 | new_friend_is_defn = DECL_INITIAL (new_friend) != NULL_TREE; | |
4503 | new_friend_result_template_info = NULL_TREE; | |
4504 | } | |
36a117a5 | 4505 | |
36a117a5 MM |
4506 | old_decl = pushdecl_namespace_level (new_friend); |
4507 | ||
4508 | if (old_decl != new_friend) | |
4509 | { | |
4510 | /* This new friend declaration matched an existing | |
4511 | declaration. For example, given: | |
4512 | ||
4513 | template <class T> void f(T); | |
4514 | template <class U> class C { | |
4515 | template <class T> friend void f(T) {} | |
4516 | }; | |
4517 | ||
4518 | the friend declaration actually provides the definition | |
4519 | of `f', once C has been instantiated for some type. So, | |
4520 | old_decl will be the out-of-class template declaration, | |
4521 | while new_friend is the in-class definition. | |
4522 | ||
4523 | But, if `f' was called before this point, the | |
4524 | instantiation of `f' will have DECL_TI_ARGS corresponding | |
4525 | to `T' but not to `U', references to which might appear | |
4526 | in the definition of `f'. Previously, the most general | |
4527 | template for an instantiation of `f' was the out-of-class | |
4528 | version; now it is the in-class version. Therefore, we | |
4529 | run through all specialization of `f', adding to their | |
4530 | DECL_TI_ARGS appropriately. In particular, they need a | |
4531 | new set of outer arguments, corresponding to the | |
4532 | arguments for this class instantiation. | |
4533 | ||
4534 | The same situation can arise with something like this: | |
4535 | ||
4536 | friend void f(int); | |
4537 | template <class T> class C { | |
4538 | friend void f(T) {} | |
4539 | }; | |
4540 | ||
4541 | when `C<int>' is instantiated. Now, `f(int)' is defined | |
4542 | in the class. */ | |
4543 | ||
fbf1c34b MM |
4544 | if (!new_friend_is_defn) |
4545 | /* On the other hand, if the in-class declaration does | |
4546 | *not* provide a definition, then we don't want to alter | |
4547 | existing definitions. We can just leave everything | |
4548 | alone. */ | |
36a117a5 | 4549 | ; |
fbf1c34b | 4550 | else |
36a117a5 | 4551 | { |
fbf1c34b MM |
4552 | /* Overwrite whatever template info was there before, if |
4553 | any, with the new template information pertaining to | |
4554 | the declaration. */ | |
4555 | DECL_TEMPLATE_INFO (old_decl) = new_friend_template_info; | |
4556 | ||
4557 | if (TREE_CODE (old_decl) != TEMPLATE_DECL) | |
4558 | /* duplicate_decls will take care of this case. */ | |
4559 | ; | |
4560 | else | |
36a117a5 | 4561 | { |
fbf1c34b MM |
4562 | tree t; |
4563 | tree new_friend_args; | |
4564 | ||
4565 | DECL_TEMPLATE_INFO (DECL_RESULT (old_decl)) | |
4566 | = new_friend_result_template_info; | |
4567 | ||
4568 | new_friend_args = TI_ARGS (new_friend_template_info); | |
4569 | for (t = DECL_TEMPLATE_SPECIALIZATIONS (old_decl); | |
4570 | t != NULL_TREE; | |
4571 | t = TREE_CHAIN (t)) | |
4572 | { | |
4573 | tree spec = TREE_VALUE (t); | |
36a117a5 | 4574 | |
fbf1c34b MM |
4575 | DECL_TI_ARGS (spec) |
4576 | = add_outermost_template_args (new_friend_args, | |
4577 | DECL_TI_ARGS (spec)); | |
4578 | DECL_TI_ARGS (spec) | |
4579 | = copy_to_permanent (DECL_TI_ARGS (spec)); | |
4580 | } | |
4581 | ||
4582 | /* Now, since specializations are always supposed to | |
4583 | hang off of the most general template, we must move | |
4584 | them. */ | |
4585 | t = most_general_template (old_decl); | |
4586 | if (t != old_decl) | |
4587 | { | |
4588 | DECL_TEMPLATE_SPECIALIZATIONS (t) | |
4589 | = chainon (DECL_TEMPLATE_SPECIALIZATIONS (t), | |
4590 | DECL_TEMPLATE_SPECIALIZATIONS (old_decl)); | |
4591 | DECL_TEMPLATE_SPECIALIZATIONS (old_decl) = NULL_TREE; | |
4592 | } | |
36a117a5 MM |
4593 | } |
4594 | } | |
4595 | ||
4596 | /* The information from NEW_FRIEND has been merged into OLD_DECL | |
4597 | by duplicate_decls. */ | |
4598 | new_friend = old_decl; | |
4599 | } | |
f84b4be9 JM |
4600 | } |
4601 | else if (TYPE_SIZE (DECL_CONTEXT (new_friend))) | |
4602 | { | |
4603 | /* Check to see that the declaration is really present, and, | |
4604 | possibly obtain an improved declaration. */ | |
4605 | tree fn = check_classfn (DECL_CONTEXT (new_friend), | |
4606 | new_friend); | |
4607 | ||
4608 | if (fn) | |
4609 | new_friend = fn; | |
4610 | } | |
4611 | ||
27fafc8d JM |
4612 | done: |
4613 | lineno = line; | |
4614 | input_filename = file; | |
f84b4be9 JM |
4615 | return new_friend; |
4616 | } | |
4617 | ||
1aed5355 MM |
4618 | /* FRIEND_TMPL is a friend TEMPLATE_DECL. ARGS is the vector of |
4619 | template arguments, as for tsubst. | |
6757edfe MM |
4620 | |
4621 | Returns an appropriate tsbust'd friend type. */ | |
4622 | ||
4623 | static tree | |
1aed5355 MM |
4624 | tsubst_friend_class (friend_tmpl, args) |
4625 | tree friend_tmpl; | |
6757edfe MM |
4626 | tree args; |
4627 | { | |
1aed5355 | 4628 | tree friend_type; |
25aab5d0 | 4629 | tree tmpl; |
6757edfe | 4630 | |
25aab5d0 MM |
4631 | /* First, we look for a class template. */ |
4632 | tmpl = lookup_name (DECL_NAME (friend_tmpl), /*prefer_type=*/0); | |
4633 | ||
4634 | /* But, if we don't find one, it might be because we're in a | |
4635 | situation like this: | |
4636 | ||
4637 | template <class T> | |
4638 | struct S { | |
4639 | template <class U> | |
4640 | friend struct S; | |
4641 | }; | |
4642 | ||
4643 | Here, in the scope of (say) S<int>, `S' is bound to a TYPE_DECL | |
4644 | for `S<int>', not the TEMPLATE_DECL. */ | |
bc639f90 | 4645 | if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl)) |
25aab5d0 MM |
4646 | { |
4647 | tmpl = lookup_name (DECL_NAME (friend_tmpl), /*prefer_type=*/1); | |
4648 | tmpl = maybe_get_template_decl_from_type_decl (tmpl); | |
4649 | } | |
6757edfe | 4650 | |
25aab5d0 | 4651 | if (tmpl && DECL_CLASS_TEMPLATE_P (tmpl)) |
6757edfe MM |
4652 | { |
4653 | /* The friend template has already been declared. Just | |
36a117a5 MM |
4654 | check to see that the declarations match, and install any new |
4655 | default parameters. We must tsubst the default parameters, | |
4656 | of course. We only need the innermost template parameters | |
4657 | because that is all that redeclare_class_template will look | |
4658 | at. */ | |
4659 | tree parms | |
4660 | = tsubst_template_parms (DECL_TEMPLATE_PARMS (friend_tmpl), | |
4393e105 | 4661 | args, /*complain=*/1); |
36a117a5 | 4662 | redeclare_class_template (TREE_TYPE (tmpl), parms); |
6757edfe MM |
4663 | friend_type = TREE_TYPE (tmpl); |
4664 | } | |
4665 | else | |
4666 | { | |
4667 | /* The friend template has not already been declared. In this | |
4668 | case, the instantiation of the template class will cause the | |
4669 | injection of this template into the global scope. */ | |
4393e105 | 4670 | tmpl = tsubst (friend_tmpl, args, /*complain=*/1, NULL_TREE); |
6757edfe MM |
4671 | |
4672 | /* The new TMPL is not an instantiation of anything, so we | |
4673 | forget its origins. We don't reset CLASSTYPE_TI_TEMPLATE for | |
4674 | the new type because that is supposed to be the corresponding | |
4675 | template decl, i.e., TMPL. */ | |
4676 | DECL_USE_TEMPLATE (tmpl) = 0; | |
4677 | DECL_TEMPLATE_INFO (tmpl) = NULL_TREE; | |
4678 | CLASSTYPE_USE_TEMPLATE (TREE_TYPE (tmpl)) = 0; | |
4679 | ||
4680 | /* Inject this template into the global scope. */ | |
4681 | friend_type = TREE_TYPE (pushdecl_top_level (tmpl)); | |
4682 | } | |
4683 | ||
4684 | return friend_type; | |
4685 | } | |
f84b4be9 | 4686 | |
8d08fdba | 4687 | tree |
5566b478 MS |
4688 | instantiate_class_template (type) |
4689 | tree type; | |
8d08fdba | 4690 | { |
61a127b3 | 4691 | tree template, args, pattern, t; |
36a117a5 | 4692 | tree typedecl; |
8d08fdba | 4693 | |
5566b478 | 4694 | if (type == error_mark_node) |
8d08fdba MS |
4695 | return error_mark_node; |
4696 | ||
5566b478 MS |
4697 | if (TYPE_BEING_DEFINED (type) || TYPE_SIZE (type)) |
4698 | return type; | |
4699 | ||
7ddedda4 MM |
4700 | /* We want to allocate temporary vectors of template arguments and |
4701 | template argument expressions on the momentary obstack, not on | |
4702 | the expression obstack. Otherwise, all the space allocated in | |
4703 | argument coercion and such is simply lost. */ | |
4704 | push_momentary (); | |
4705 | ||
6bdb985f | 4706 | /* Figure out which template is being instantiated. */ |
36a117a5 | 4707 | template = most_general_template (CLASSTYPE_TI_TEMPLATE (type)); |
5566b478 | 4708 | my_friendly_assert (TREE_CODE (template) == TEMPLATE_DECL, 279); |
73aad9b9 | 4709 | |
6bdb985f MM |
4710 | /* Figure out which arguments are being used to do the |
4711 | instantiation. */ | |
4712 | args = CLASSTYPE_TI_ARGS (type); | |
4c571114 | 4713 | PARTIAL_INSTANTIATION_P (type) = uses_template_parms (args); |
6bdb985f | 4714 | |
4c571114 MM |
4715 | if (pedantic && PARTIAL_INSTANTIATION_P (type)) |
4716 | /* If this is a partial instantiation, then we can't instantiate | |
4717 | the type; there's no telling whether or not one of the | |
4718 | template parameters might eventually be instantiated to some | |
4719 | value that results in a specialization being used. For | |
4720 | example, consider: | |
4721 | ||
4722 | template <class T> | |
4723 | struct S {}; | |
4724 | ||
4725 | template <class U> | |
4726 | void f(S<U>); | |
4727 | ||
4728 | template <> | |
4729 | struct S<int> {}; | |
4730 | ||
4731 | Now, the `S<U>' in `f<int>' is the specialization, not an | |
5db698f6 | 4732 | instantiation of the original template. */ |
4c571114 MM |
4733 | goto end; |
4734 | ||
4735 | /* Determine what specialization of the original template to | |
4736 | instantiate. */ | |
4737 | if (PARTIAL_INSTANTIATION_P (type)) | |
6bdb985f MM |
4738 | /* There's no telling which specialization is appropriate at this |
4739 | point. Since all peeking at the innards of this partial | |
4740 | instantiation are extensions (like the "implicit typename" | |
4741 | extension, which allows users to omit the keyword `typename' on | |
4742 | names that are declared as types in template base classes), we | |
4743 | are free to do what we please. | |
4744 | ||
4745 | Trying to figure out which partial instantiation to use can | |
4746 | cause a crash. (Some of the template arguments don't even have | |
4747 | types.) So, we just use the most general version. */ | |
4748 | t = NULL_TREE; | |
4749 | else | |
73aad9b9 | 4750 | { |
6bdb985f MM |
4751 | t = most_specialized_class (template, args); |
4752 | ||
4753 | if (t == error_mark_node) | |
73aad9b9 | 4754 | { |
d8e178a0 | 4755 | const char *str = "candidates are:"; |
6bdb985f MM |
4756 | cp_error ("ambiguous class template instantiation for `%#T'", type); |
4757 | for (t = DECL_TEMPLATE_SPECIALIZATIONS (template); t; | |
4758 | t = TREE_CHAIN (t)) | |
73aad9b9 | 4759 | { |
6bdb985f MM |
4760 | if (get_class_bindings (TREE_VALUE (t), TREE_PURPOSE (t), |
4761 | args)) | |
4762 | { | |
4763 | cp_error_at ("%s %+#T", str, TREE_TYPE (t)); | |
4764 | str = " "; | |
4765 | } | |
73aad9b9 | 4766 | } |
6bdb985f MM |
4767 | TYPE_BEING_DEFINED (type) = 1; |
4768 | type = error_mark_node; | |
4769 | goto end; | |
73aad9b9 | 4770 | } |
73aad9b9 | 4771 | } |
6bdb985f MM |
4772 | |
4773 | if (t) | |
73aad9b9 JM |
4774 | pattern = TREE_TYPE (t); |
4775 | else | |
4776 | pattern = TREE_TYPE (template); | |
5566b478 | 4777 | |
4c571114 MM |
4778 | /* If the template we're instantiating is incomplete, then clearly |
4779 | there's nothing we can do. */ | |
5566b478 | 4780 | if (TYPE_SIZE (pattern) == NULL_TREE) |
7ddedda4 | 4781 | goto end; |
5566b478 | 4782 | |
4c571114 MM |
4783 | /* If this is a partial instantiation, don't tsubst anything. We will |
4784 | only use this type for implicit typename, so the actual contents don't | |
4785 | matter. All that matters is whether a particular name is a type. */ | |
4786 | if (PARTIAL_INSTANTIATION_P (type)) | |
4787 | { | |
4788 | /* The fields set here must be kept in sync with those cleared | |
4789 | in begin_class_definition. */ | |
4790 | TYPE_BINFO_BASETYPES (type) = TYPE_BINFO_BASETYPES (pattern); | |
4791 | TYPE_FIELDS (type) = TYPE_FIELDS (pattern); | |
4792 | TYPE_METHODS (type) = TYPE_METHODS (pattern); | |
4793 | CLASSTYPE_TAGS (type) = CLASSTYPE_TAGS (pattern); | |
4794 | /* Pretend that the type is complete, so that we will look | |
4795 | inside it during name lookup and such. */ | |
4796 | TYPE_SIZE (type) = integer_zero_node; | |
4797 | goto end; | |
4798 | } | |
4799 | ||
4800 | /* If we've recursively instantiated too many templates, stop. */ | |
4801 | if (! push_tinst_level (type)) | |
4802 | goto end; | |
4803 | ||
4804 | /* Now we're really doing the instantiation. Mark the type as in | |
4805 | the process of being defined. */ | |
4806 | TYPE_BEING_DEFINED (type) = 1; | |
4807 | ||
4808 | maybe_push_to_top_level (uses_template_parms (type)); | |
4c571114 | 4809 | |
73aad9b9 | 4810 | if (t) |
36a117a5 MM |
4811 | { |
4812 | /* This TYPE is actually a instantiation of of a partial | |
4813 | specialization. We replace the innermost set of ARGS with | |
4814 | the arguments appropriate for substitution. For example, | |
4815 | given: | |
4816 | ||
4817 | template <class T> struct S {}; | |
4818 | template <class T> struct S<T*> {}; | |
4819 | ||
4820 | and supposing that we are instantiating S<int*>, ARGS will | |
4821 | present be {int*} but we need {int}. */ | |
4822 | tree inner_args | |
4823 | = get_class_bindings (TREE_VALUE (t), TREE_PURPOSE (t), | |
4824 | args); | |
4825 | ||
4826 | /* If there were multiple levels in ARGS, replacing the | |
4827 | innermost level would alter CLASSTYPE_TI_ARGS, which we don't | |
4828 | want, so we make a copy first. */ | |
4829 | if (TMPL_ARGS_HAVE_MULTIPLE_LEVELS (args)) | |
4830 | { | |
4831 | args = copy_node (args); | |
4832 | SET_TMPL_ARGS_LEVEL (args, TMPL_ARGS_DEPTH (args), inner_args); | |
4833 | } | |
4834 | else | |
4835 | args = inner_args; | |
4836 | } | |
8d019cef | 4837 | |
5566b478 MS |
4838 | if (flag_external_templates) |
4839 | { | |
4840 | if (flag_alt_external_templates) | |
4841 | { | |
4842 | CLASSTYPE_INTERFACE_ONLY (type) = interface_only; | |
4843 | SET_CLASSTYPE_INTERFACE_UNKNOWN_X (type, interface_unknown); | |
4844 | CLASSTYPE_VTABLE_NEEDS_WRITING (type) | |
2604412d JM |
4845 | = (! CLASSTYPE_INTERFACE_ONLY (type) |
4846 | && CLASSTYPE_INTERFACE_KNOWN (type)); | |
5566b478 MS |
4847 | } |
4848 | else | |
4849 | { | |
4850 | CLASSTYPE_INTERFACE_ONLY (type) = CLASSTYPE_INTERFACE_ONLY (pattern); | |
4851 | SET_CLASSTYPE_INTERFACE_UNKNOWN_X | |
4852 | (type, CLASSTYPE_INTERFACE_UNKNOWN (pattern)); | |
4853 | CLASSTYPE_VTABLE_NEEDS_WRITING (type) | |
2604412d JM |
4854 | = (! CLASSTYPE_INTERFACE_ONLY (type) |
4855 | && CLASSTYPE_INTERFACE_KNOWN (type)); | |
5566b478 MS |
4856 | } |
4857 | } | |
4858 | else | |
8d08fdba | 4859 | { |
5566b478 MS |
4860 | SET_CLASSTYPE_INTERFACE_UNKNOWN (type); |
4861 | CLASSTYPE_VTABLE_NEEDS_WRITING (type) = 1; | |
8d08fdba MS |
4862 | } |
4863 | ||
f7da6097 MS |
4864 | TYPE_HAS_CONSTRUCTOR (type) = TYPE_HAS_CONSTRUCTOR (pattern); |
4865 | TYPE_HAS_DESTRUCTOR (type) = TYPE_HAS_DESTRUCTOR (pattern); | |
f7da6097 MS |
4866 | TYPE_OVERLOADS_CALL_EXPR (type) = TYPE_OVERLOADS_CALL_EXPR (pattern); |
4867 | TYPE_OVERLOADS_ARRAY_REF (type) = TYPE_OVERLOADS_ARRAY_REF (pattern); | |
4868 | TYPE_OVERLOADS_ARROW (type) = TYPE_OVERLOADS_ARROW (pattern); | |
4869 | TYPE_GETS_NEW (type) = TYPE_GETS_NEW (pattern); | |
4870 | TYPE_GETS_DELETE (type) = TYPE_GETS_DELETE (pattern); | |
4871 | TYPE_VEC_DELETE_TAKES_SIZE (type) = TYPE_VEC_DELETE_TAKES_SIZE (pattern); | |
4872 | TYPE_HAS_ASSIGN_REF (type) = TYPE_HAS_ASSIGN_REF (pattern); | |
4873 | TYPE_HAS_CONST_ASSIGN_REF (type) = TYPE_HAS_CONST_ASSIGN_REF (pattern); | |
4874 | TYPE_HAS_ABSTRACT_ASSIGN_REF (type) = TYPE_HAS_ABSTRACT_ASSIGN_REF (pattern); | |
4875 | TYPE_HAS_INIT_REF (type) = TYPE_HAS_INIT_REF (pattern); | |
4876 | TYPE_HAS_CONST_INIT_REF (type) = TYPE_HAS_CONST_INIT_REF (pattern); | |
f7da6097 MS |
4877 | TYPE_HAS_DEFAULT_CONSTRUCTOR (type) = TYPE_HAS_DEFAULT_CONSTRUCTOR (pattern); |
4878 | TYPE_HAS_CONVERSION (type) = TYPE_HAS_CONVERSION (pattern); | |
4879 | TYPE_USES_COMPLEX_INHERITANCE (type) | |
4880 | = TYPE_USES_COMPLEX_INHERITANCE (pattern); | |
4881 | TYPE_USES_MULTIPLE_INHERITANCE (type) | |
4882 | = TYPE_USES_MULTIPLE_INHERITANCE (pattern); | |
4883 | TYPE_USES_VIRTUAL_BASECLASSES (type) | |
4884 | = TYPE_USES_VIRTUAL_BASECLASSES (pattern); | |
4885 | TYPE_PACKED (type) = TYPE_PACKED (pattern); | |
4886 | TYPE_ALIGN (type) = TYPE_ALIGN (pattern); | |
eff71ab0 | 4887 | TYPE_FOR_JAVA (type) = TYPE_FOR_JAVA (pattern); /* For libjava's JArray<T> */ |
6bdb8141 JM |
4888 | if (ANON_AGGR_TYPE_P (pattern)) |
4889 | SET_ANON_AGGR_TYPE_P (type); | |
f7da6097 | 4890 | |
4c571114 MM |
4891 | /* We must copy the arguments to the permanent obstack since |
4892 | during the tsubst'ing below they may wind up in the | |
4893 | DECL_TI_ARGS of some instantiated member template. */ | |
4894 | args = copy_to_permanent (args); | |
2604412d | 4895 | |
3fd71a52 MM |
4896 | if (TYPE_BINFO_BASETYPES (pattern)) |
4897 | { | |
4898 | tree base_list = NULL_TREE; | |
4899 | tree pbases = TYPE_BINFO_BASETYPES (pattern); | |
4900 | int i; | |
5566b478 | 4901 | |
3fd71a52 MM |
4902 | /* Substitute into each of the bases to determine the actual |
4903 | basetypes. */ | |
4904 | for (i = 0; i < TREE_VEC_LENGTH (pbases); ++i) | |
4905 | { | |
4906 | tree base; | |
4907 | tree access; | |
4908 | tree pbase; | |
5566b478 | 4909 | |
3fd71a52 | 4910 | pbase = TREE_VEC_ELT (pbases, i); |
711734a9 | 4911 | |
3fd71a52 MM |
4912 | /* Substitue to figure out the base class. */ |
4913 | base = tsubst (BINFO_TYPE (pbase), args, | |
4914 | /*complain=*/1, NULL_TREE); | |
4915 | if (base == error_mark_node) | |
4916 | continue; | |
711734a9 | 4917 | |
3fd71a52 MM |
4918 | /* Calculate the correct access node. */ |
4919 | if (TREE_VIA_VIRTUAL (pbase)) | |
4920 | { | |
4921 | if (TREE_VIA_PUBLIC (pbase)) | |
4922 | access = access_public_virtual_node; | |
4923 | else if (TREE_VIA_PROTECTED (pbase)) | |
4924 | access = access_protected_virtual_node; | |
d6479fe7 | 4925 | else |
3fd71a52 MM |
4926 | access = access_private_virtual_node; |
4927 | } | |
4928 | else | |
4929 | { | |
4930 | if (TREE_VIA_PUBLIC (pbase)) | |
4931 | access = access_public_node; | |
4932 | else if (TREE_VIA_PROTECTED (pbase)) | |
4933 | access = access_protected_node; | |
d6479fe7 | 4934 | else |
3fd71a52 MM |
4935 | access = access_private_node; |
4936 | } | |
dfbcd65a | 4937 | |
3fd71a52 MM |
4938 | base_list = tree_cons (access, base, base_list); |
4939 | } | |
dfbcd65a | 4940 | |
3fd71a52 MM |
4941 | /* The list is now in reverse order; correct that. */ |
4942 | base_list = nreverse (base_list); | |
4943 | ||
4944 | /* Now call xref_basetypes to set up all the base-class | |
4945 | information. */ | |
4946 | xref_basetypes (TREE_CODE (pattern) == RECORD_TYPE | |
4947 | ? (CLASSTYPE_DECLARED_CLASS (pattern) | |
4948 | ? class_type_node : record_type_node) | |
4949 | : union_type_node, | |
4950 | DECL_NAME (TYPE_NAME (pattern)), | |
4951 | type, | |
4952 | base_list); | |
4953 | } | |
5566b478 | 4954 | |
b74a0560 MM |
4955 | /* Now that our base classes are set up, enter the scope of the |
4956 | class, so that name lookups into base classes, etc. will work | |
4957 | corectly. This is precisely analagous to what we do in | |
4958 | begin_class_definition when defining an ordinary non-template | |
4959 | class. */ | |
4960 | pushclass (type, 1); | |
4961 | ||
5566b478 | 4962 | for (t = CLASSTYPE_TAGS (pattern); t; t = TREE_CHAIN (t)) |
8d08fdba | 4963 | { |
5566b478 | 4964 | tree tag = TREE_VALUE (t); |
36a117a5 MM |
4965 | tree name = TYPE_IDENTIFIER (tag); |
4966 | tree newtag; | |
5566b478 | 4967 | |
4393e105 | 4968 | newtag = tsubst (tag, args, /*complain=*/1, NULL_TREE); |
61a127b3 | 4969 | if (TREE_CODE (newtag) != ENUMERAL_TYPE) |
ed44da02 | 4970 | { |
486e4077 MM |
4971 | if (TYPE_LANG_SPECIFIC (tag) && CLASSTYPE_IS_TEMPLATE (tag)) |
4972 | /* Unfortunately, lookup_template_class sets | |
4973 | CLASSTYPE_IMPLICIT_INSTANTIATION for a partial | |
4974 | instantiation (i.e., for the type of a member template | |
4975 | class nested within a template class.) This behavior is | |
4976 | required for maybe_process_partial_specialization to work | |
4977 | correctly, but is not accurate in this case; the TAG is not | |
4978 | an instantiation of anything. (The corresponding | |
4979 | TEMPLATE_DECL is an instantiation, but the TYPE is not.) */ | |
4980 | CLASSTYPE_USE_TEMPLATE (newtag) = 0; | |
4981 | ||
ed44da02 MM |
4982 | /* Now, we call pushtag to put this NEWTAG into the scope of |
4983 | TYPE. We first set up the IDENTIFIER_TYPE_VALUE to avoid | |
4984 | pushtag calling push_template_decl. We don't have to do | |
4985 | this for enums because it will already have been done in | |
4986 | tsubst_enum. */ | |
4987 | if (name) | |
4988 | SET_IDENTIFIER_TYPE_VALUE (name, newtag); | |
4989 | pushtag (name, newtag, /*globalize=*/0); | |
4990 | } | |
8d08fdba MS |
4991 | } |
4992 | ||
5566b478 MS |
4993 | /* Don't replace enum constants here. */ |
4994 | for (t = TYPE_FIELDS (pattern); t; t = TREE_CHAIN (t)) | |
4995 | if (TREE_CODE (t) != CONST_DECL) | |
4996 | { | |
ae58fa02 MM |
4997 | tree r; |
4998 | ||
4999 | /* The the file and line for this declaration, to assist in | |
5000 | error message reporting. Since we called push_tinst_level | |
5001 | above, we don't need to restore these. */ | |
5002 | lineno = DECL_SOURCE_LINE (t); | |
5003 | input_filename = DECL_SOURCE_FILE (t); | |
5004 | ||
4393e105 | 5005 | r = tsubst (t, args, /*complain=*/1, NULL_TREE); |
5566b478 MS |
5006 | if (TREE_CODE (r) == VAR_DECL) |
5007 | { | |
fa8d6e85 MM |
5008 | tree init; |
5009 | ||
94c82a77 | 5010 | if (DECL_DEFINED_IN_CLASS_P (r)) |
fa8d6e85 MM |
5011 | init = tsubst_expr (DECL_INITIAL (t), args, |
5012 | /*complain=*/1, NULL_TREE); | |
5013 | else | |
5014 | init = NULL_TREE; | |
5015 | ||
5016 | finish_static_data_member_decl (r, init, | |
5017 | /*asmspec_tree=*/NULL_TREE, | |
5018 | /*need_pop=*/0, | |
5019 | /*flags=*/0); | |
5020 | ||
6ba89f8e MM |
5021 | if (DECL_DEFINED_IN_CLASS_P (r)) |
5022 | check_static_variable_definition (r, TREE_TYPE (r)); | |
5566b478 | 5023 | } |
61a127b3 MM |
5024 | |
5025 | /* R will have a TREE_CHAIN if and only if it has already been | |
5026 | processed by finish_member_declaration. This can happen | |
5027 | if, for example, it is a TYPE_DECL for a class-scoped | |
5028 | ENUMERAL_TYPE; such a thing will already have been added to | |
5029 | the field list by tsubst_enum above. */ | |
5030 | if (!TREE_CHAIN (r)) | |
5031 | { | |
5032 | set_current_access_from_decl (r); | |
5033 | finish_member_declaration (r); | |
5034 | } | |
5566b478 | 5035 | } |
8d08fdba | 5036 | |
61a127b3 MM |
5037 | /* Set up the list (TYPE_METHODS) and vector (CLASSTYPE_METHOD_VEC) |
5038 | for this instantiation. */ | |
5039 | for (t = TYPE_METHODS (pattern); t; t = TREE_CHAIN (t)) | |
5040 | { | |
4393e105 | 5041 | tree r = tsubst (t, args, /*complain=*/1, NULL_TREE); |
61a127b3 MM |
5042 | set_current_access_from_decl (r); |
5043 | finish_member_declaration (r); | |
5044 | } | |
8d08fdba | 5045 | |
2604412d JM |
5046 | /* Construct the DECL_FRIENDLIST for the new class type. */ |
5047 | typedecl = TYPE_MAIN_DECL (type); | |
5048 | for (t = DECL_FRIENDLIST (TYPE_MAIN_DECL (pattern)); | |
5049 | t != NULL_TREE; | |
5050 | t = TREE_CHAIN (t)) | |
f84b4be9 | 5051 | { |
2604412d | 5052 | tree friends; |
f84b4be9 | 5053 | |
2604412d JM |
5054 | for (friends = TREE_VALUE (t); |
5055 | friends != NULL_TREE; | |
5056 | friends = TREE_CHAIN (friends)) | |
0c0aac2f MM |
5057 | if (TREE_PURPOSE (friends) == error_mark_node) |
5058 | add_friend (type, | |
5059 | tsubst_friend_function (TREE_VALUE (friends), | |
5060 | args)); | |
5061 | else | |
5062 | add_friends (type, | |
5063 | tsubst_copy (TREE_PURPOSE (t), args, | |
5064 | /*complain=*/1, NULL_TREE), | |
5065 | tsubst (TREE_PURPOSE (friends), args, | |
5066 | /*complain=*/1, NULL_TREE)); | |
2604412d | 5067 | } |
5566b478 | 5068 | |
6757edfe MM |
5069 | for (t = CLASSTYPE_FRIEND_CLASSES (pattern); |
5070 | t != NULL_TREE; | |
5071 | t = TREE_CHAIN (t)) | |
5072 | { | |
5073 | tree friend_type = TREE_VALUE (t); | |
1aed5355 | 5074 | tree new_friend_type; |
6757edfe | 5075 | |
36a117a5 MM |
5076 | if (TREE_CODE (friend_type) == TEMPLATE_DECL) |
5077 | new_friend_type = tsubst_friend_class (friend_type, args); | |
5078 | else if (uses_template_parms (friend_type)) | |
4393e105 MM |
5079 | new_friend_type = tsubst (friend_type, args, /*complain=*/1, |
5080 | NULL_TREE); | |
36a117a5 | 5081 | else |
6757edfe MM |
5082 | /* The call to xref_tag_from_type does injection for friend |
5083 | classes. */ | |
1aed5355 | 5084 | new_friend_type = |
36a117a5 MM |
5085 | xref_tag_from_type (friend_type, NULL_TREE, 1); |
5086 | ||
1aed5355 MM |
5087 | |
5088 | if (TREE_CODE (friend_type) == TEMPLATE_DECL) | |
5089 | /* Trick make_friend_class into realizing that the friend | |
5090 | we're adding is a template, not an ordinary class. It's | |
5091 | important that we use make_friend_class since it will | |
5092 | perform some error-checking and output cross-reference | |
5093 | information. */ | |
5094 | ++processing_template_decl; | |
5095 | ||
5096 | make_friend_class (type, new_friend_type); | |
fc378698 | 5097 | |
1aed5355 MM |
5098 | if (TREE_CODE (friend_type) == TEMPLATE_DECL) |
5099 | --processing_template_decl; | |
6757edfe | 5100 | } |
fc378698 | 5101 | |
2604412d JM |
5102 | /* This does injection for friend functions. */ |
5103 | if (!processing_template_decl) | |
5104 | { | |
4393e105 MM |
5105 | t = tsubst (DECL_TEMPLATE_INJECT (template), args, |
5106 | /*complain=*/1, NULL_TREE); | |
5566b478 | 5107 | |
2604412d JM |
5108 | for (; t; t = TREE_CHAIN (t)) |
5109 | { | |
5110 | tree d = TREE_VALUE (t); | |
fc378698 | 5111 | |
2604412d JM |
5112 | if (TREE_CODE (d) == TYPE_DECL) |
5113 | /* Already injected. */; | |
5114 | else | |
5115 | pushdecl (d); | |
5116 | } | |
5117 | } | |
5566b478 | 5118 | |
2604412d JM |
5119 | for (t = TYPE_FIELDS (type); t; t = TREE_CHAIN (t)) |
5120 | if (TREE_CODE (t) == FIELD_DECL) | |
5121 | { | |
5122 | TREE_TYPE (t) = complete_type (TREE_TYPE (t)); | |
5123 | require_complete_type (t); | |
5124 | } | |
5566b478 | 5125 | |
61a127b3 MM |
5126 | /* Set the file and line number information to whatever is given for |
5127 | the class itself. This puts error messages involving generated | |
5128 | implicit functions at a predictable point, and the same point | |
5129 | that would be used for non-template classes. */ | |
5130 | lineno = DECL_SOURCE_LINE (typedecl); | |
5131 | input_filename = DECL_SOURCE_FILE (typedecl); | |
5132 | ||
5133 | unreverse_member_declarations (type); | |
0aafb128 | 5134 | finish_struct_1 (type, 0); |
2604412d | 5135 | CLASSTYPE_GOT_SEMICOLON (type) = 1; |
e92cc029 | 5136 | |
5524676d JM |
5137 | /* Clear this now so repo_template_used is happy. */ |
5138 | TYPE_BEING_DEFINED (type) = 0; | |
2604412d | 5139 | repo_template_used (type); |
8d08fdba | 5140 | |
b74a0560 | 5141 | popclass (); |
5566b478 MS |
5142 | pop_from_top_level (); |
5143 | pop_tinst_level (); | |
5144 | ||
7ddedda4 MM |
5145 | end: |
5146 | pop_momentary (); | |
5147 | ||
5566b478 | 5148 | return type; |
8d08fdba MS |
5149 | } |
5150 | ||
5151 | static int | |
5152 | list_eq (t1, t2) | |
5153 | tree t1, t2; | |
5154 | { | |
5155 | if (t1 == NULL_TREE) | |
5156 | return t2 == NULL_TREE; | |
5157 | if (t2 == NULL_TREE) | |
5158 | return 0; | |
5159 | /* Don't care if one declares its arg const and the other doesn't -- the | |
5160 | main variant of the arg type is all that matters. */ | |
5161 | if (TYPE_MAIN_VARIANT (TREE_VALUE (t1)) | |
5162 | != TYPE_MAIN_VARIANT (TREE_VALUE (t2))) | |
5163 | return 0; | |
5164 | return list_eq (TREE_CHAIN (t1), TREE_CHAIN (t2)); | |
5165 | } | |
5166 | ||
00d3396f JM |
5167 | /* If arg is a non-type template parameter that does not depend on template |
5168 | arguments, fold it like we weren't in the body of a template. */ | |
5169 | ||
5170 | static tree | |
5171 | maybe_fold_nontype_arg (arg) | |
5172 | tree arg; | |
5173 | { | |
5174 | if (TREE_CODE_CLASS (TREE_CODE (arg)) != 't' | |
5175 | && !uses_template_parms (arg)) | |
5176 | { | |
5177 | /* Sometimes, one of the args was an expression involving a | |
5178 | template constant parameter, like N - 1. Now that we've | |
5179 | tsubst'd, we might have something like 2 - 1. This will | |
5180 | confuse lookup_template_class, so we do constant folding | |
5181 | here. We have to unset processing_template_decl, to | |
5182 | fool build_expr_from_tree() into building an actual | |
5183 | tree. */ | |
5184 | ||
5185 | int saved_processing_template_decl = processing_template_decl; | |
5186 | processing_template_decl = 0; | |
5187 | arg = fold (build_expr_from_tree (arg)); | |
5188 | processing_template_decl = saved_processing_template_decl; | |
5189 | } | |
5190 | return arg; | |
5191 | } | |
5192 | ||
a221d52f | 5193 | /* Return the TREE_VEC with the arguments for the innermost template header, |
36a117a5 MM |
5194 | where ARGS is either that or the VEC of VECs for all the |
5195 | arguments. */ | |
a221d52f JM |
5196 | |
5197 | tree | |
36a117a5 | 5198 | innermost_args (args) |
a221d52f | 5199 | tree args; |
a221d52f | 5200 | { |
36a117a5 | 5201 | return TMPL_ARGS_LEVEL (args, TMPL_ARGS_DEPTH (args)); |
a221d52f | 5202 | } |
f84b4be9 | 5203 | |
830bfa74 MM |
5204 | /* Substitute ARGS into the vector of template arguments T. */ |
5205 | ||
e9659ab0 | 5206 | static tree |
4393e105 | 5207 | tsubst_template_arg_vector (t, args, complain) |
830bfa74 MM |
5208 | tree t; |
5209 | tree args; | |
4393e105 | 5210 | int complain; |
830bfa74 MM |
5211 | { |
5212 | int len = TREE_VEC_LENGTH (t), need_new = 0, i; | |
5213 | tree *elts = (tree *) alloca (len * sizeof (tree)); | |
5214 | ||
5215 | bzero ((char *) elts, len * sizeof (tree)); | |
5216 | ||
5217 | for (i = 0; i < len; i++) | |
5218 | { | |
5219 | if (TREE_VEC_ELT (t, i) != NULL_TREE | |
5220 | && TREE_CODE (TREE_VEC_ELT (t, i)) == TREE_VEC) | |
4393e105 MM |
5221 | elts[i] = tsubst_template_arg_vector (TREE_VEC_ELT (t, i), |
5222 | args, complain); | |
830bfa74 MM |
5223 | else |
5224 | elts[i] = maybe_fold_nontype_arg | |
4393e105 MM |
5225 | (tsubst_expr (TREE_VEC_ELT (t, i), args, complain, |
5226 | NULL_TREE)); | |
830bfa74 MM |
5227 | |
5228 | if (elts[i] != TREE_VEC_ELT (t, i)) | |
5229 | need_new = 1; | |
5230 | } | |
5231 | ||
5232 | if (!need_new) | |
5233 | return t; | |
5234 | ||
7ddedda4 | 5235 | t = make_temp_vec (len); |
830bfa74 MM |
5236 | for (i = 0; i < len; i++) |
5237 | TREE_VEC_ELT (t, i) = elts[i]; | |
5238 | ||
5239 | return t; | |
5240 | } | |
5241 | ||
36a117a5 MM |
5242 | /* Return the result of substituting ARGS into the template parameters |
5243 | given by PARMS. If there are m levels of ARGS and m + n levels of | |
5244 | PARMS, then the result will contain n levels of PARMS. For | |
5245 | example, if PARMS is `template <class T> template <class U> | |
5246 | template <T*, U, class V>' and ARGS is {{int}, {double}} then the | |
5247 | result will be `template <int*, double, class V>'. */ | |
5248 | ||
e9659ab0 | 5249 | static tree |
4393e105 | 5250 | tsubst_template_parms (parms, args, complain) |
36a117a5 MM |
5251 | tree parms; |
5252 | tree args; | |
4393e105 | 5253 | int complain; |
36a117a5 MM |
5254 | { |
5255 | tree r; | |
5256 | tree* new_parms = &r; | |
5257 | ||
5258 | for (new_parms = &r; | |
5259 | TMPL_PARMS_DEPTH (parms) > TMPL_ARGS_DEPTH (args); | |
5260 | new_parms = &(TREE_CHAIN (*new_parms)), | |
5261 | parms = TREE_CHAIN (parms)) | |
5262 | { | |
5263 | tree new_vec = | |
5264 | make_tree_vec (TREE_VEC_LENGTH (TREE_VALUE (parms))); | |
5265 | int i; | |
5266 | ||
5267 | for (i = 0; i < TREE_VEC_LENGTH (new_vec); ++i) | |
5268 | { | |
5269 | tree default_value = | |
5270 | TREE_PURPOSE (TREE_VEC_ELT (TREE_VALUE (parms), i)); | |
5271 | tree parm_decl = | |
5272 | TREE_VALUE (TREE_VEC_ELT (TREE_VALUE (parms), i)); | |
5273 | ||
5274 | TREE_VEC_ELT (new_vec, i) | |
4393e105 MM |
5275 | = build_tree_list (tsubst (default_value, args, complain, |
5276 | NULL_TREE), | |
5277 | tsubst (parm_decl, args, complain, | |
5278 | NULL_TREE)); | |
36a117a5 MM |
5279 | } |
5280 | ||
5281 | *new_parms = | |
5282 | tree_cons (build_int_2 (0, (TMPL_PARMS_DEPTH (parms) | |
5283 | - TMPL_ARGS_DEPTH (args))), | |
5284 | new_vec, NULL_TREE); | |
5285 | } | |
5286 | ||
5287 | return r; | |
5288 | } | |
5289 | ||
ed44da02 MM |
5290 | /* Substitute the ARGS into the indicated aggregate (or enumeration) |
5291 | type T. If T is not an aggregate or enumeration type, it is | |
5292 | handled as if by tsubst. IN_DECL is as for tsubst. If | |
5293 | ENTERING_SCOPE is non-zero, T is the context for a template which | |
5294 | we are presently tsubst'ing. Return the subsituted value. */ | |
36a117a5 | 5295 | |
e9659ab0 | 5296 | static tree |
4393e105 | 5297 | tsubst_aggr_type (t, args, complain, in_decl, entering_scope) |
36a117a5 MM |
5298 | tree t; |
5299 | tree args; | |
4393e105 | 5300 | int complain; |
36a117a5 MM |
5301 | tree in_decl; |
5302 | int entering_scope; | |
5303 | { | |
5304 | if (t == NULL_TREE) | |
5305 | return NULL_TREE; | |
5306 | ||
5307 | switch (TREE_CODE (t)) | |
5308 | { | |
5309 | case RECORD_TYPE: | |
5310 | if (TYPE_PTRMEMFUNC_P (t)) | |
5311 | { | |
5312 | tree r = build_ptrmemfunc_type | |
4393e105 | 5313 | (tsubst (TYPE_PTRMEMFUNC_FN_TYPE (t), args, complain, in_decl)); |
91063b51 | 5314 | return cp_build_qualified_type (r, TYPE_QUALS (t)); |
36a117a5 MM |
5315 | } |
5316 | ||
5317 | /* else fall through */ | |
ed44da02 | 5318 | case ENUMERAL_TYPE: |
36a117a5 | 5319 | case UNION_TYPE: |
5db698f6 | 5320 | if (TYPE_TEMPLATE_INFO (t)) |
36a117a5 MM |
5321 | { |
5322 | tree argvec; | |
5323 | tree context; | |
5324 | tree r; | |
5325 | ||
5326 | /* First, determine the context for the type we are looking | |
5327 | up. */ | |
5328 | if (TYPE_CONTEXT (t) != NULL_TREE) | |
5329 | context = tsubst_aggr_type (TYPE_CONTEXT (t), args, | |
4393e105 | 5330 | complain, |
36a117a5 MM |
5331 | in_decl, /*entering_scope=*/1); |
5332 | else | |
5333 | context = NULL_TREE; | |
5334 | ||
5335 | /* Then, figure out what arguments are appropriate for the | |
5336 | type we are trying to find. For example, given: | |
5337 | ||
5338 | template <class T> struct S; | |
5339 | template <class T, class U> void f(T, U) { S<U> su; } | |
5340 | ||
5341 | and supposing that we are instantiating f<int, double>, | |
5342 | then our ARGS will be {int, double}, but, when looking up | |
5343 | S we only want {double}. */ | |
7ddedda4 | 5344 | push_momentary (); |
4393e105 MM |
5345 | argvec = tsubst_template_arg_vector (TYPE_TI_ARGS (t), args, |
5346 | complain); | |
36a117a5 MM |
5347 | |
5348 | r = lookup_template_class (t, argvec, in_decl, context, | |
5349 | entering_scope); | |
7ddedda4 | 5350 | pop_momentary (); |
36a117a5 | 5351 | |
91063b51 | 5352 | return cp_build_qualified_type (r, TYPE_QUALS (t)); |
36a117a5 MM |
5353 | } |
5354 | else | |
5355 | /* This is not a template type, so there's nothing to do. */ | |
5356 | return t; | |
5357 | ||
5358 | default: | |
4393e105 | 5359 | return tsubst (t, args, complain, in_decl); |
36a117a5 MM |
5360 | } |
5361 | } | |
5362 | ||
ae58fa02 MM |
5363 | /* Substitute the ARGS into the T, which is a _DECL. TYPE is the |
5364 | (already computed) substitution of ARGS into TREE_TYPE (T), if | |
5365 | appropriate. Return the result of the substitution. IN_DECL is as | |
5366 | for tsubst. */ | |
00d3396f | 5367 | |
e9659ab0 | 5368 | static tree |
ae58fa02 MM |
5369 | tsubst_decl (t, args, type, in_decl) |
5370 | tree t; | |
5371 | tree args; | |
5372 | tree type; | |
8d08fdba MS |
5373 | tree in_decl; |
5374 | { | |
ae58fa02 MM |
5375 | int saved_lineno; |
5376 | char* saved_filename; | |
b370501f | 5377 | tree r = NULL_TREE; |
830bfa74 | 5378 | |
ae58fa02 MM |
5379 | /* Set the filename and linenumber to improve error-reporting. */ |
5380 | saved_lineno = lineno; | |
5381 | saved_filename = input_filename; | |
5382 | lineno = DECL_SOURCE_LINE (t); | |
5383 | input_filename = DECL_SOURCE_FILE (t); | |
b7484fbe | 5384 | |
8d08fdba MS |
5385 | switch (TREE_CODE (t)) |
5386 | { | |
98c1c668 JM |
5387 | case TEMPLATE_DECL: |
5388 | { | |
5389 | /* We can get here when processing a member template function | |
5390 | of a template class. */ | |
98c1c668 | 5391 | tree decl = DECL_TEMPLATE_RESULT (t); |
386b8a85 | 5392 | tree spec; |
db2767b6 | 5393 | int is_template_template_parm = DECL_TEMPLATE_TEMPLATE_PARM_P (t); |
98c1c668 | 5394 | |
db2767b6 MM |
5395 | if (!is_template_template_parm) |
5396 | { | |
36a117a5 MM |
5397 | /* We might already have an instance of this template. |
5398 | The ARGS are for the surrounding class type, so the | |
5399 | full args contain the tsubst'd args for the context, | |
5400 | plus the innermost args from the template decl. */ | |
5401 | tree tmpl_args = DECL_CLASS_TEMPLATE_P (t) | |
5402 | ? CLASSTYPE_TI_ARGS (TREE_TYPE (t)) | |
5403 | : DECL_TI_ARGS (DECL_RESULT (t)); | |
7ddedda4 MM |
5404 | tree full_args; |
5405 | ||
5406 | push_momentary (); | |
4393e105 MM |
5407 | full_args = tsubst_template_arg_vector (tmpl_args, args, |
5408 | /*complain=*/1); | |
36a117a5 MM |
5409 | |
5410 | /* tsubst_template_arg_vector doesn't copy the vector if | |
5411 | nothing changed. But, *something* should have | |
5412 | changed. */ | |
5413 | my_friendly_assert (full_args != tmpl_args, 0); | |
5414 | ||
5415 | spec = retrieve_specialization (t, full_args); | |
7ddedda4 | 5416 | pop_momentary (); |
db2767b6 | 5417 | if (spec != NULL_TREE) |
ae58fa02 MM |
5418 | { |
5419 | r = spec; | |
5420 | break; | |
5421 | } | |
db2767b6 | 5422 | } |
98c1c668 JM |
5423 | |
5424 | /* Make a new template decl. It will be similar to the | |
5425 | original, but will record the current template arguments. | |
5426 | We also create a new function declaration, which is just | |
5427 | like the old one, but points to this new template, rather | |
5428 | than the old one. */ | |
ae58fa02 MM |
5429 | r = copy_node (t); |
5430 | copy_lang_decl (r); | |
5431 | my_friendly_assert (DECL_LANG_SPECIFIC (r) != 0, 0); | |
5432 | TREE_CHAIN (r) = NULL_TREE; | |
db2767b6 MM |
5433 | |
5434 | if (is_template_template_parm) | |
5435 | { | |
4393e105 | 5436 | tree new_decl = tsubst (decl, args, /*complain=*/1, in_decl); |
ae58fa02 MM |
5437 | DECL_RESULT (r) = new_decl; |
5438 | TREE_TYPE (r) = TREE_TYPE (new_decl); | |
5439 | break; | |
db2767b6 MM |
5440 | } |
5441 | ||
ae58fa02 | 5442 | DECL_CONTEXT (r) |
4393e105 MM |
5443 | = tsubst_aggr_type (DECL_CONTEXT (t), args, /*complain=*/1, |
5444 | in_decl, /*entering_scope=*/1); | |
ae58fa02 | 5445 | DECL_CLASS_CONTEXT (r) |
4393e105 MM |
5446 | = tsubst_aggr_type (DECL_CLASS_CONTEXT (t), args, |
5447 | /*complain=*/1, in_decl, | |
5448 | /*entering_scope=*/1); | |
ae58fa02 | 5449 | DECL_TEMPLATE_INFO (r) = build_tree_list (t, args); |
93cdc044 JM |
5450 | |
5451 | if (TREE_CODE (decl) == TYPE_DECL) | |
5452 | { | |
4393e105 MM |
5453 | tree new_type = tsubst (TREE_TYPE (t), args, |
5454 | /*complain=*/1, in_decl); | |
ae58fa02 MM |
5455 | TREE_TYPE (r) = new_type; |
5456 | CLASSTYPE_TI_TEMPLATE (new_type) = r; | |
5457 | DECL_RESULT (r) = TYPE_MAIN_DECL (new_type); | |
5458 | DECL_TI_ARGS (r) = CLASSTYPE_TI_ARGS (new_type); | |
93cdc044 JM |
5459 | } |
5460 | else | |
5461 | { | |
4393e105 | 5462 | tree new_decl = tsubst (decl, args, /*complain=*/1, in_decl); |
ae58fa02 MM |
5463 | DECL_RESULT (r) = new_decl; |
5464 | DECL_TI_TEMPLATE (new_decl) = r; | |
5465 | TREE_TYPE (r) = TREE_TYPE (new_decl); | |
5466 | DECL_TI_ARGS (r) = DECL_TI_ARGS (new_decl); | |
93cdc044 JM |
5467 | } |
5468 | ||
ae58fa02 MM |
5469 | SET_DECL_IMPLICIT_INSTANTIATION (r); |
5470 | DECL_TEMPLATE_INSTANTIATIONS (r) = NULL_TREE; | |
5471 | DECL_TEMPLATE_SPECIALIZATIONS (r) = NULL_TREE; | |
98c1c668 JM |
5472 | |
5473 | /* The template parameters for this new template are all the | |
5474 | template parameters for the old template, except the | |
5475 | outermost level of parameters. */ | |
ae58fa02 | 5476 | DECL_TEMPLATE_PARMS (r) |
4393e105 MM |
5477 | = tsubst_template_parms (DECL_TEMPLATE_PARMS (t), args, |
5478 | /*complain=*/1); | |
98c1c668 | 5479 | |
93cdc044 | 5480 | if (PRIMARY_TEMPLATE_P (t)) |
ae58fa02 | 5481 | DECL_PRIMARY_TEMPLATE (r) = r; |
93cdc044 | 5482 | |
8d019cef | 5483 | /* We don't partially instantiate partial specializations. */ |
93cdc044 | 5484 | if (TREE_CODE (decl) == TYPE_DECL) |
ae58fa02 | 5485 | break; |
93cdc044 | 5486 | |
75650646 MM |
5487 | for (spec = DECL_TEMPLATE_SPECIALIZATIONS (t); |
5488 | spec != NULL_TREE; | |
5489 | spec = TREE_CHAIN (spec)) | |
5490 | { | |
5491 | /* It helps to consider example here. Consider: | |
5492 | ||
5493 | template <class T> | |
5494 | struct S { | |
5495 | template <class U> | |
5496 | void f(U u); | |
5497 | ||
5498 | template <> | |
5499 | void f(T* t) {} | |
5500 | }; | |
5501 | ||
5502 | Now, for example, we are instantiating S<int>::f(U u). | |
5503 | We want to make a template: | |
5504 | ||
5505 | template <class U> | |
5506 | void S<int>::f(U); | |
5507 | ||
5508 | It will have a specialization, for the case U = int*, of | |
5509 | the form: | |
5510 | ||
5511 | template <> | |
5512 | void S<int>::f<int*>(int*); | |
5513 | ||
5514 | This specialization will be an instantiation of | |
5515 | the specialization given in the declaration of S, with | |
5516 | argument list int*. */ | |
5517 | ||
5518 | tree fn = TREE_VALUE (spec); | |
5519 | tree spec_args; | |
5520 | tree new_fn; | |
5521 | ||
5522 | if (!DECL_TEMPLATE_SPECIALIZATION (fn)) | |
5523 | /* Instantiations are on the same list, but they're of | |
5524 | no concern to us. */ | |
5525 | continue; | |
5526 | ||
36a117a5 MM |
5527 | if (TREE_CODE (fn) != TEMPLATE_DECL) |
5528 | /* A full specialization. There's no need to record | |
5529 | that here. */ | |
5530 | continue; | |
5531 | ||
4393e105 MM |
5532 | spec_args = tsubst (DECL_TI_ARGS (fn), args, |
5533 | /*complain=*/1, in_decl); | |
36a117a5 | 5534 | new_fn = tsubst (DECL_RESULT (most_general_template (fn)), |
4393e105 | 5535 | spec_args, /*complain=*/1, in_decl); |
36a117a5 | 5536 | DECL_TI_TEMPLATE (new_fn) = fn; |
ae58fa02 | 5537 | register_specialization (new_fn, r, |
36a117a5 | 5538 | innermost_args (spec_args)); |
75650646 MM |
5539 | } |
5540 | ||
5541 | /* Record this partial instantiation. */ | |
ae58fa02 MM |
5542 | register_specialization (r, t, |
5543 | DECL_TI_ARGS (DECL_RESULT (r))); | |
75650646 | 5544 | |
98c1c668 | 5545 | } |
ae58fa02 | 5546 | break; |
8d08fdba MS |
5547 | |
5548 | case FUNCTION_DECL: | |
5549 | { | |
386b8a85 | 5550 | tree ctx; |
87603ed0 | 5551 | tree argvec = NULL_TREE; |
cf38f48a | 5552 | tree *friends; |
36a117a5 | 5553 | tree gen_tmpl; |
5566b478 | 5554 | int member; |
d8c4447d MM |
5555 | int args_depth; |
5556 | int parms_depth; | |
5566b478 | 5557 | |
36a117a5 MM |
5558 | /* Nobody should be tsubst'ing into non-template functions. */ |
5559 | my_friendly_assert (DECL_TEMPLATE_INFO (t) != NULL_TREE, 0); | |
5560 | ||
5561 | if (TREE_CODE (DECL_TI_TEMPLATE (t)) == TEMPLATE_DECL) | |
5562 | { | |
5563 | tree spec; | |
5564 | ||
7ddedda4 MM |
5565 | /* Allocate template arguments on the momentary obstack, |
5566 | in case we don't need to keep them. */ | |
5567 | push_momentary (); | |
5568 | ||
36a117a5 MM |
5569 | /* Calculate the most general template of which R is a |
5570 | specialization, and the complete set of arguments used to | |
5571 | specialize R. */ | |
5572 | gen_tmpl = most_general_template (DECL_TI_TEMPLATE (t)); | |
7ddedda4 MM |
5573 | argvec |
5574 | = tsubst_template_arg_vector (DECL_TI_ARGS | |
5575 | (DECL_TEMPLATE_RESULT (gen_tmpl)), | |
4393e105 | 5576 | args, /*complain=*/1); |
36a117a5 MM |
5577 | |
5578 | /* Check to see if we already have this specialization. */ | |
5579 | spec = retrieve_specialization (gen_tmpl, argvec); | |
7ddedda4 | 5580 | |
36a117a5 | 5581 | if (spec) |
ae58fa02 MM |
5582 | { |
5583 | r = spec; | |
7ddedda4 | 5584 | pop_momentary (); |
ae58fa02 MM |
5585 | break; |
5586 | } | |
d8c4447d | 5587 | |
7ddedda4 MM |
5588 | /* We're going to need to keep the ARGVEC, so we copy it |
5589 | here. */ | |
5590 | argvec = copy_to_permanent (argvec); | |
5591 | pop_momentary (); | |
5592 | ||
d8c4447d MM |
5593 | /* Here, we deal with the peculiar case: |
5594 | ||
5595 | template <class T> struct S { | |
5596 | template <class U> friend void f(); | |
5597 | }; | |
5598 | template <class U> friend void f() {} | |
5599 | template S<int>; | |
5600 | template void f<double>(); | |
5601 | ||
5602 | Here, the ARGS for the instantiation of will be {int, | |
5603 | double}. But, we only need as many ARGS as there are | |
5604 | levels of template parameters in CODE_PATTERN. We are | |
5605 | careful not to get fooled into reducing the ARGS in | |
5606 | situations like: | |
5607 | ||
5608 | template <class T> struct S { template <class U> void f(U); } | |
5609 | template <class T> template <> void S<T>::f(int) {} | |
5610 | ||
5611 | which we can spot because the pattern will be a | |
5612 | specialization in this case. */ | |
5613 | args_depth = TMPL_ARGS_DEPTH (args); | |
5614 | parms_depth = | |
5615 | TMPL_PARMS_DEPTH (DECL_TEMPLATE_PARMS (DECL_TI_TEMPLATE (t))); | |
5616 | if (args_depth > parms_depth | |
5617 | && !DECL_TEMPLATE_SPECIALIZATION (t)) | |
5618 | { | |
5619 | my_friendly_assert (DECL_FRIEND_P (t), 0); | |
5620 | ||
5621 | if (parms_depth > 1) | |
5622 | { | |
5623 | int i; | |
5624 | ||
5625 | args = make_temp_vec (parms_depth); | |
5626 | for (i = 0; i < parms_depth; ++i) | |
5627 | TREE_VEC_ELT (args, i) = | |
5628 | TREE_VEC_ELT (args, i + (args_depth - parms_depth)); | |
5629 | } | |
5630 | else | |
5631 | args = TREE_VEC_ELT (args, args_depth - parms_depth); | |
5632 | } | |
36a117a5 MM |
5633 | } |
5634 | else | |
5635 | { | |
5636 | /* This special case arises when we have something like this: | |
5637 | ||
5638 | template <class T> struct S { | |
5639 | friend void f<int>(int, double); | |
5640 | }; | |
5641 | ||
5642 | Here, the DECL_TI_TEMPLATE for the friend declaration | |
39c01e4c MM |
5643 | will be a LOOKUP_EXPR or an IDENTIFIER_NODE. We are |
5644 | being called from tsubst_friend_function, and we want | |
5645 | only to create a new decl (R) with appropriate types so | |
5646 | that we can call determine_specialization. */ | |
5647 | my_friendly_assert ((TREE_CODE (DECL_TI_TEMPLATE (t)) | |
5648 | == LOOKUP_EXPR) | |
5649 | || (TREE_CODE (DECL_TI_TEMPLATE (t)) | |
5650 | == IDENTIFIER_NODE), 0); | |
36a117a5 MM |
5651 | gen_tmpl = NULL_TREE; |
5652 | } | |
5653 | ||
6eb3bb27 | 5654 | if (DECL_CLASS_SCOPE_P (t)) |
8d08fdba | 5655 | { |
5566b478 MS |
5656 | if (DECL_NAME (t) == constructor_name (DECL_CONTEXT (t))) |
5657 | member = 2; | |
5658 | else | |
5659 | member = 1; | |
4393e105 MM |
5660 | ctx = tsubst_aggr_type (DECL_CLASS_CONTEXT (t), args, |
5661 | /*complain=*/1, t, | |
36a117a5 | 5662 | /*entering_scope=*/1); |
5566b478 MS |
5663 | } |
5664 | else | |
5665 | { | |
5666 | member = 0; | |
5667 | ctx = NULL_TREE; | |
5566b478 | 5668 | } |
4393e105 | 5669 | type = tsubst (type, args, /*complain=*/1, in_decl); |
8d08fdba | 5670 | |
5566b478 MS |
5671 | /* We do NOT check for matching decls pushed separately at this |
5672 | point, as they may not represent instantiations of this | |
5673 | template, and in any case are considered separate under the | |
312e7d50 | 5674 | discrete model. Instead, see add_maybe_template. */ |
5566b478 MS |
5675 | |
5676 | r = copy_node (t); | |
5677 | copy_lang_decl (r); | |
e1467ff2 | 5678 | DECL_USE_TEMPLATE (r) = 0; |
5566b478 MS |
5679 | TREE_TYPE (r) = type; |
5680 | ||
5681 | DECL_CONTEXT (r) | |
4393e105 MM |
5682 | = tsubst_aggr_type (DECL_CONTEXT (t), args, /*complain=*/1, t, |
5683 | /*entering_scope=*/1); | |
5566b478 MS |
5684 | DECL_CLASS_CONTEXT (r) = ctx; |
5685 | ||
4c571114 | 5686 | if (member && IDENTIFIER_TYPENAME_P (DECL_NAME (r))) |
f181d4ae MM |
5687 | /* Type-conversion operator. Reconstruct the name, in |
5688 | case it's the name of one of the template's parameters. */ | |
5689 | DECL_NAME (r) = build_typename_overload (TREE_TYPE (type)); | |
5566b478 | 5690 | |
4393e105 MM |
5691 | DECL_ARGUMENTS (r) = tsubst (DECL_ARGUMENTS (t), args, |
5692 | /*complain=*/1, t); | |
711734a9 JM |
5693 | DECL_MAIN_VARIANT (r) = r; |
5694 | DECL_RESULT (r) = NULL_TREE; | |
711734a9 JM |
5695 | |
5696 | TREE_STATIC (r) = 0; | |
5697 | TREE_PUBLIC (r) = TREE_PUBLIC (t); | |
5698 | DECL_EXTERNAL (r) = 1; | |
5699 | DECL_INTERFACE_KNOWN (r) = 0; | |
5700 | DECL_DEFER_OUTPUT (r) = 0; | |
5701 | TREE_CHAIN (r) = NULL_TREE; | |
5702 | DECL_PENDING_INLINE_INFO (r) = 0; | |
5703 | TREE_USED (r) = 0; | |
5704 | ||
36a117a5 MM |
5705 | /* Set up the DECL_TEMPLATE_INFO for R and compute its mangled |
5706 | name. There's no need to do this in the special friend | |
5707 | case mentioned above where GEN_TMPL is NULL. */ | |
5708 | if (gen_tmpl) | |
386b8a85 | 5709 | { |
7ddedda4 MM |
5710 | /* The ARGVEC was built on the momentary obstack. Make it |
5711 | permanent now. */ | |
5712 | argvec = copy_to_permanent (argvec); | |
36a117a5 MM |
5713 | DECL_TEMPLATE_INFO (r) |
5714 | = perm_tree_cons (gen_tmpl, argvec, NULL_TREE); | |
5715 | SET_DECL_IMPLICIT_INSTANTIATION (r); | |
5716 | register_specialization (r, gen_tmpl, argvec); | |
5717 | ||
5718 | /* Set the mangled name for R. */ | |
5719 | if (DECL_DESTRUCTOR_P (t)) | |
5720 | DECL_ASSEMBLER_NAME (r) = build_destructor_name (ctx); | |
5721 | else | |
386b8a85 | 5722 | { |
36a117a5 MM |
5723 | /* Instantiations of template functions must be mangled |
5724 | specially, in order to conform to 14.5.5.1 | |
5725 | [temp.over.link]. */ | |
5726 | tree tmpl = DECL_TI_TEMPLATE (t); | |
386b8a85 | 5727 | |
36a117a5 MM |
5728 | /* TMPL will be NULL if this is a specialization of a |
5729 | member function of a template class. */ | |
5730 | if (name_mangling_version < 1 | |
5731 | || tmpl == NULL_TREE | |
5732 | || (member && !is_member_template (tmpl) | |
5733 | && !DECL_TEMPLATE_INFO (tmpl))) | |
5734 | set_mangled_name_for_decl (r); | |
75650646 | 5735 | else |
36a117a5 | 5736 | set_mangled_name_for_template_decl (r); |
386b8a85 | 5737 | } |
36a117a5 MM |
5738 | |
5739 | DECL_RTL (r) = 0; | |
5740 | make_decl_rtl (r, NULL_PTR, 1); | |
5741 | ||
5742 | /* Like grokfndecl. If we don't do this, pushdecl will | |
5743 | mess up our TREE_CHAIN because it doesn't find a | |
5744 | previous decl. Sigh. */ | |
5745 | if (member | |
c36ae80f | 5746 | && ! uses_template_parms (r) |
36a117a5 MM |
5747 | && (IDENTIFIER_GLOBAL_VALUE (DECL_ASSEMBLER_NAME (r)) |
5748 | == NULL_TREE)) | |
5749 | SET_IDENTIFIER_GLOBAL_VALUE (DECL_ASSEMBLER_NAME (r), r); | |
386b8a85 | 5750 | } |
f181d4ae | 5751 | |
cf38f48a MM |
5752 | /* Copy the list of befriending classes. */ |
5753 | for (friends = &DECL_BEFRIENDING_CLASSES (r); | |
5754 | *friends; | |
5755 | friends = &TREE_CHAIN (*friends)) | |
5756 | { | |
5757 | *friends = copy_node (*friends); | |
5758 | TREE_VALUE (*friends) = tsubst (TREE_VALUE (*friends), | |
5759 | args, /*complain=*/1, | |
5760 | in_decl); | |
5761 | } | |
5762 | ||
f181d4ae MM |
5763 | if (DECL_CONSTRUCTOR_P (r)) |
5764 | { | |
5765 | maybe_retrofit_in_chrg (r); | |
5766 | grok_ctor_properties (ctx, r); | |
5767 | } | |
5768 | if (IDENTIFIER_OPNAME_P (DECL_NAME (r))) | |
5769 | grok_op_properties (r, DECL_VIRTUAL_P (r), DECL_FRIEND_P (r)); | |
8d08fdba | 5770 | } |
ae58fa02 | 5771 | break; |
8d08fdba MS |
5772 | |
5773 | case PARM_DECL: | |
5774 | { | |
ae58fa02 | 5775 | r = copy_node (t); |
5566b478 | 5776 | TREE_TYPE (r) = type; |
1b8899d1 MM |
5777 | c_apply_type_quals_to_decl (CP_TYPE_QUALS (type), r); |
5778 | ||
db2767b6 MM |
5779 | if (TREE_CODE (DECL_INITIAL (r)) != TEMPLATE_PARM_INDEX) |
5780 | DECL_INITIAL (r) = TREE_TYPE (r); | |
5781 | else | |
4393e105 MM |
5782 | DECL_INITIAL (r) = tsubst (DECL_INITIAL (r), args, |
5783 | /*complain=*/1, in_decl); | |
db2767b6 | 5784 | |
5566b478 | 5785 | DECL_CONTEXT (r) = NULL_TREE; |
f83b0cb6 JM |
5786 | #ifdef PROMOTE_PROTOTYPES |
5787 | if ((TREE_CODE (type) == INTEGER_TYPE | |
5788 | || TREE_CODE (type) == ENUMERAL_TYPE) | |
5789 | && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node)) | |
5790 | DECL_ARG_TYPE (r) = integer_type_node; | |
5791 | #endif | |
8d08fdba | 5792 | if (TREE_CHAIN (t)) |
4393e105 MM |
5793 | TREE_CHAIN (r) = tsubst (TREE_CHAIN (t), args, |
5794 | /*complain=*/1, TREE_CHAIN (t)); | |
8d08fdba | 5795 | } |
ae58fa02 | 5796 | break; |
8d08fdba | 5797 | |
5566b478 MS |
5798 | case FIELD_DECL: |
5799 | { | |
ae58fa02 | 5800 | r = copy_node (t); |
5566b478 | 5801 | copy_lang_decl (r); |
1b8899d1 MM |
5802 | TREE_TYPE (r) = type; |
5803 | c_apply_type_quals_to_decl (CP_TYPE_QUALS (type), r); | |
5804 | ||
5805 | /* We don't have to set DECL_CONTEXT here; it is set by | |
5806 | finish_member_declaration. */ | |
4393e105 MM |
5807 | DECL_INITIAL (r) = tsubst_expr (DECL_INITIAL (t), args, |
5808 | /*complain=*/1, in_decl); | |
5566b478 | 5809 | TREE_CHAIN (r) = NULL_TREE; |
4393e105 | 5810 | if (TREE_CODE (type) == VOID_TYPE) |
8251199e | 5811 | cp_error_at ("instantiation of `%D' as type void", r); |
5566b478 | 5812 | } |
ae58fa02 | 5813 | break; |
5566b478 MS |
5814 | |
5815 | case USING_DECL: | |
5816 | { | |
ae58fa02 | 5817 | r = copy_node (t); |
5566b478 | 5818 | DECL_INITIAL (r) |
4393e105 | 5819 | = tsubst_copy (DECL_INITIAL (t), args, /*complain=*/1, in_decl); |
5566b478 | 5820 | TREE_CHAIN (r) = NULL_TREE; |
5566b478 | 5821 | } |
ae58fa02 | 5822 | break; |
5566b478 MS |
5823 | |
5824 | case VAR_DECL: | |
5825 | { | |
36a117a5 MM |
5826 | tree argvec; |
5827 | tree gen_tmpl; | |
5828 | tree spec; | |
5829 | tree tmpl; | |
4393e105 MM |
5830 | tree ctx = tsubst_aggr_type (DECL_CONTEXT (t), args, |
5831 | /*complain=*/1, | |
5832 | in_decl, /*entering_scope=*/1); | |
36a117a5 MM |
5833 | |
5834 | /* Nobody should be tsubst'ing into non-template variables. */ | |
5835 | my_friendly_assert (DECL_LANG_SPECIFIC (t) | |
5836 | && DECL_TEMPLATE_INFO (t) != NULL_TREE, 0); | |
5566b478 | 5837 | |
36a117a5 MM |
5838 | /* Check to see if we already have this specialization. */ |
5839 | tmpl = DECL_TI_TEMPLATE (t); | |
5840 | gen_tmpl = most_general_template (tmpl); | |
4393e105 | 5841 | argvec = tsubst (DECL_TI_ARGS (t), args, /*complain=*/1, in_decl); |
36a117a5 MM |
5842 | spec = retrieve_specialization (gen_tmpl, argvec); |
5843 | ||
5844 | if (spec) | |
ae58fa02 MM |
5845 | { |
5846 | r = spec; | |
5847 | break; | |
5848 | } | |
5566b478 MS |
5849 | |
5850 | r = copy_node (t); | |
5851 | TREE_TYPE (r) = type; | |
1b8899d1 | 5852 | c_apply_type_quals_to_decl (CP_TYPE_QUALS (type), r); |
5566b478 | 5853 | DECL_CONTEXT (r) = ctx; |
d11ad92e MS |
5854 | |
5855 | /* Don't try to expand the initializer until someone tries to use | |
5856 | this variable; otherwise we run into circular dependencies. */ | |
5857 | DECL_INITIAL (r) = NULL_TREE; | |
5566b478 MS |
5858 | DECL_RTL (r) = 0; |
5859 | DECL_SIZE (r) = 0; | |
36a117a5 MM |
5860 | copy_lang_decl (r); |
5861 | DECL_CLASS_CONTEXT (r) = DECL_CONTEXT (r); | |
5566b478 | 5862 | |
fa8d6e85 MM |
5863 | /* A static data member declaration is always marked external |
5864 | when it is declared in-class, even if an initializer is | |
5865 | present. We mimic the non-template processing here. */ | |
5866 | DECL_EXTERNAL (r) = 1; | |
5867 | ||
36a117a5 MM |
5868 | DECL_TEMPLATE_INFO (r) = perm_tree_cons (tmpl, argvec, NULL_TREE); |
5869 | SET_DECL_IMPLICIT_INSTANTIATION (r); | |
5870 | register_specialization (r, gen_tmpl, argvec); | |
5566b478 | 5871 | |
5566b478 | 5872 | TREE_CHAIN (r) = NULL_TREE; |
519ebd1e | 5873 | if (TREE_CODE (type) == VOID_TYPE) |
8251199e | 5874 | cp_error_at ("instantiation of `%D' as type void", r); |
5566b478 | 5875 | } |
ae58fa02 | 5876 | break; |
5566b478 MS |
5877 | |
5878 | case TYPE_DECL: | |
d2e5ee5c | 5879 | if (t == TYPE_NAME (TREE_TYPE (t))) |
ae58fa02 MM |
5880 | r = TYPE_NAME (type); |
5881 | else | |
5882 | { | |
5883 | r = copy_node (t); | |
5884 | TREE_TYPE (r) = type; | |
5885 | DECL_CONTEXT (r) = current_class_type; | |
5886 | TREE_CHAIN (r) = NULL_TREE; | |
5887 | } | |
5888 | break; | |
5889 | ||
5890 | default: | |
5891 | my_friendly_abort (0); | |
5892 | } | |
5893 | ||
5894 | /* Restore the file and line information. */ | |
5895 | lineno = saved_lineno; | |
5896 | input_filename = saved_filename; | |
5897 | ||
5898 | return r; | |
5899 | } | |
5900 | ||
cabc336a MM |
5901 | /* Substitue into the ARG_TYPES of a function type. */ |
5902 | ||
e9659ab0 | 5903 | static tree |
4393e105 | 5904 | tsubst_arg_types (arg_types, args, complain, in_decl) |
cabc336a MM |
5905 | tree arg_types; |
5906 | tree args; | |
4393e105 | 5907 | int complain; |
cabc336a MM |
5908 | tree in_decl; |
5909 | { | |
5910 | tree remaining_arg_types; | |
cabc336a MM |
5911 | tree type; |
5912 | ||
5913 | if (!arg_types || arg_types == void_list_node) | |
5914 | return arg_types; | |
5915 | ||
5916 | remaining_arg_types = tsubst_arg_types (TREE_CHAIN (arg_types), | |
4393e105 MM |
5917 | args, complain, in_decl); |
5918 | if (remaining_arg_types == error_mark_node) | |
5919 | return error_mark_node; | |
5920 | ||
5921 | type = tsubst (TREE_VALUE (arg_types), args, complain, in_decl); | |
5922 | if (type == error_mark_node) | |
5923 | return error_mark_node; | |
cabc336a | 5924 | |
4393e105 MM |
5925 | /* Do array-to-pointer, function-to-pointer conversion, and ignore |
5926 | top-level qualifiers as required. */ | |
5927 | type = TYPE_MAIN_VARIANT (type_decays_to (type)); | |
cabc336a MM |
5928 | |
5929 | /* Note that we do not substitute into default arguments here. The | |
5930 | standard mandates that they be instantiated only when needed, | |
5931 | which is done in build_over_call. */ | |
51632249 JM |
5932 | return hash_tree_cons (TREE_PURPOSE (arg_types), type, |
5933 | remaining_arg_types); | |
cabc336a MM |
5934 | |
5935 | } | |
5936 | ||
4393e105 MM |
5937 | /* Substitute into a FUNCTION_TYPE or METHOD_TYPE. This routine does |
5938 | *not* handle the exception-specification for FNTYPE, because the | |
5939 | initial substitution of explicitly provided template parameters | |
5940 | during argument deduction forbids substitution into the | |
5941 | exception-specification: | |
5942 | ||
5943 | [temp.deduct] | |
5944 | ||
5945 | All references in the function type of the function template to the | |
5946 | corresponding template parameters are replaced by the specified tem- | |
5947 | plate argument values. If a substitution in a template parameter or | |
5948 | in the function type of the function template results in an invalid | |
5949 | type, type deduction fails. [Note: The equivalent substitution in | |
5950 | exception specifications is done only when the function is instanti- | |
5951 | ated, at which point a program is ill-formed if the substitution | |
5952 | results in an invalid type.] */ | |
5953 | ||
5954 | static tree | |
5955 | tsubst_function_type (t, args, complain, in_decl) | |
5956 | tree t; | |
5957 | tree args; | |
5958 | int complain; | |
5959 | tree in_decl; | |
5960 | { | |
5961 | tree return_type; | |
5962 | tree arg_types; | |
5963 | tree fntype; | |
5964 | ||
5965 | /* The TYPE_CONTEXT is not used for function/method types. */ | |
5966 | my_friendly_assert (TYPE_CONTEXT (t) == NULL_TREE, 0); | |
5967 | ||
5968 | /* Substitue the return type. */ | |
5969 | return_type = tsubst (TREE_TYPE (t), args, complain, in_decl); | |
5970 | if (return_type == error_mark_node) | |
5971 | return error_mark_node; | |
5972 | ||
5973 | /* Substitue the argument types. */ | |
5974 | arg_types = tsubst_arg_types (TYPE_ARG_TYPES (t), args, | |
5975 | complain, in_decl); | |
5976 | if (arg_types == error_mark_node) | |
5977 | return error_mark_node; | |
5978 | ||
5979 | /* Construct a new type node and return it. */ | |
5980 | if (TREE_CODE (t) == FUNCTION_TYPE) | |
5981 | fntype = build_function_type (return_type, arg_types); | |
5982 | else | |
5983 | { | |
5984 | tree r = TREE_TYPE (TREE_VALUE (arg_types)); | |
5985 | if (! IS_AGGR_TYPE (r)) | |
5986 | { | |
5987 | /* [temp.deduct] | |
5988 | ||
5989 | Type deduction may fail for any of the following | |
5990 | reasons: | |
5991 | ||
5992 | -- Attempting to create "pointer to member of T" when T | |
5993 | is not a class type. */ | |
5994 | if (complain) | |
5995 | cp_error ("creating pointer to member function of non-class type `%T'", | |
5996 | r); | |
5997 | return error_mark_node; | |
5998 | } | |
5999 | ||
6000 | fntype = build_cplus_method_type (r, return_type, TREE_CHAIN | |
6001 | (arg_types)); | |
6002 | } | |
6003 | fntype = build_qualified_type (fntype, TYPE_QUALS (t)); | |
ada846eb | 6004 | fntype = build_type_attribute_variant (fntype, TYPE_ATTRIBUTES (t)); |
4393e105 MM |
6005 | |
6006 | return fntype; | |
6007 | } | |
6008 | ||
297e73d8 MM |
6009 | /* Substitute into the PARMS of a call-declarator. */ |
6010 | ||
e9659ab0 | 6011 | static tree |
4393e105 | 6012 | tsubst_call_declarator_parms (parms, args, complain, in_decl) |
297e73d8 MM |
6013 | tree parms; |
6014 | tree args; | |
4393e105 | 6015 | int complain; |
297e73d8 MM |
6016 | tree in_decl; |
6017 | { | |
6018 | tree new_parms; | |
6019 | tree type; | |
6020 | tree defarg; | |
6021 | ||
6022 | if (!parms || parms == void_list_node) | |
6023 | return parms; | |
6024 | ||
6025 | new_parms = tsubst_call_declarator_parms (TREE_CHAIN (parms), | |
4393e105 | 6026 | args, complain, in_decl); |
297e73d8 MM |
6027 | |
6028 | /* Figure out the type of this parameter. */ | |
4393e105 | 6029 | type = tsubst (TREE_VALUE (parms), args, complain, in_decl); |
297e73d8 MM |
6030 | |
6031 | /* Figure out the default argument as well. Note that we use | |
4393e105 MM |
6032 | tsubst_expr since the default argument is really an expression. */ |
6033 | defarg = tsubst_expr (TREE_PURPOSE (parms), args, complain, in_decl); | |
297e73d8 MM |
6034 | |
6035 | /* Chain this parameter on to the front of those we have already | |
6036 | processed. We don't use hash_tree_cons because that function | |
6037 | doesn't check TREE_PARMLIST. */ | |
6038 | new_parms = tree_cons (defarg, type, new_parms); | |
6039 | ||
6040 | /* And note that these are parameters. */ | |
6041 | TREE_PARMLIST (new_parms) = 1; | |
6042 | ||
6043 | return new_parms; | |
6044 | } | |
6045 | ||
4393e105 MM |
6046 | /* Take the tree structure T and replace template parameters used |
6047 | therein with the argument vector ARGS. IN_DECL is an associated | |
6048 | decl for diagnostics. If an error occurs, returns ERROR_MARK_NODE. | |
6049 | An appropriate error message is issued only if COMPLAIN is | |
6050 | non-zero. Note that we must be relatively non-tolerant of | |
6051 | extensions here, in order to preserve conformance; if we allow | |
6052 | substitutions that should not be allowed, we may allow argument | |
6053 | deductions that should not succeed, and therefore report ambiguous | |
6054 | overload situations where there are none. In theory, we could | |
6055 | allow the substitution, but indicate that it should have failed, | |
6056 | and allow our caller to make sure that the right thing happens, but | |
6057 | we don't try to do this yet. | |
6058 | ||
6059 | This function is used for dealing with types, decls and the like; | |
6060 | for expressions, use tsubst_expr or tsubst_copy. */ | |
ae58fa02 MM |
6061 | |
6062 | tree | |
4393e105 | 6063 | tsubst (t, args, complain, in_decl) |
ae58fa02 | 6064 | tree t, args; |
4393e105 | 6065 | int complain; |
ae58fa02 MM |
6066 | tree in_decl; |
6067 | { | |
0ecfe0b4 | 6068 | tree type, r; |
ae58fa02 MM |
6069 | |
6070 | if (t == NULL_TREE || t == error_mark_node | |
6071 | || t == integer_type_node | |
6072 | || t == void_type_node | |
6073 | || t == char_type_node | |
6074 | || TREE_CODE (t) == NAMESPACE_DECL) | |
6075 | return t; | |
6076 | ||
6077 | if (TREE_CODE (t) == IDENTIFIER_NODE) | |
6078 | type = IDENTIFIER_TYPE_VALUE (t); | |
6079 | else | |
6080 | type = TREE_TYPE (t); | |
6081 | if (type == unknown_type_node) | |
6082 | my_friendly_abort (42); | |
6083 | ||
6084 | if (type && TREE_CODE (t) != FUNCTION_DECL | |
6085 | && TREE_CODE (t) != TYPENAME_TYPE | |
6086 | && TREE_CODE (t) != TEMPLATE_DECL | |
4393e105 MM |
6087 | && TREE_CODE (t) != IDENTIFIER_NODE |
6088 | && TREE_CODE (t) != FUNCTION_TYPE | |
6089 | && TREE_CODE (t) != METHOD_TYPE) | |
6090 | type = tsubst (type, args, complain, in_decl); | |
6091 | if (type == error_mark_node) | |
6092 | return error_mark_node; | |
ae58fa02 MM |
6093 | |
6094 | if (TREE_CODE_CLASS (TREE_CODE (t)) == 'd') | |
6095 | return tsubst_decl (t, args, type, in_decl); | |
6096 | ||
6097 | switch (TREE_CODE (t)) | |
6098 | { | |
6099 | case RECORD_TYPE: | |
6100 | case UNION_TYPE: | |
6101 | case ENUMERAL_TYPE: | |
4393e105 MM |
6102 | return tsubst_aggr_type (t, args, complain, in_decl, |
6103 | /*entering_scope=*/0); | |
ae58fa02 MM |
6104 | |
6105 | case ERROR_MARK: | |
6106 | case IDENTIFIER_NODE: | |
6107 | case OP_IDENTIFIER: | |
6108 | case VOID_TYPE: | |
6109 | case REAL_TYPE: | |
6110 | case COMPLEX_TYPE: | |
6111 | case BOOLEAN_TYPE: | |
6112 | case INTEGER_CST: | |
6113 | case REAL_CST: | |
6114 | case STRING_CST: | |
6115 | return t; | |
6116 | ||
6117 | case INTEGER_TYPE: | |
6118 | if (t == integer_type_node) | |
6119 | return t; | |
6120 | ||
6121 | if (TREE_CODE (TYPE_MIN_VALUE (t)) == INTEGER_CST | |
6122 | && TREE_CODE (TYPE_MAX_VALUE (t)) == INTEGER_CST) | |
6123 | return t; | |
d2e5ee5c | 6124 | |
5566b478 | 6125 | { |
ddce3528 | 6126 | tree max, omax = TREE_OPERAND (TYPE_MAX_VALUE (t), 0); |
7ddedda4 | 6127 | |
ddce3528 | 6128 | max = tsubst_expr (omax, args, complain, in_decl); |
4393e105 MM |
6129 | if (max == error_mark_node) |
6130 | return error_mark_node; | |
6131 | ||
856216bb MM |
6132 | if (processing_template_decl |
6133 | /* When providing explicit arguments to a template | |
6134 | function, but leaving some arguments for subsequent | |
6135 | deduction, MAX may be template-dependent even if we're | |
6136 | not PROCESSING_TEMPLATE_DECL. */ | |
6137 | || TREE_CODE (max) != INTEGER_CST) | |
ae58fa02 MM |
6138 | { |
6139 | tree itype = make_node (INTEGER_TYPE); | |
6140 | TYPE_MIN_VALUE (itype) = size_zero_node; | |
6141 | TYPE_MAX_VALUE (itype) = build_min (MINUS_EXPR, sizetype, max, | |
6142 | integer_one_node); | |
6143 | return itype; | |
6144 | } | |
6145 | ||
ddce3528 JM |
6146 | if (integer_zerop (omax)) |
6147 | { | |
6148 | /* Still allow an explicit array of size zero. */ | |
6149 | if (pedantic) | |
6150 | pedwarn ("creating array with size zero"); | |
6151 | } | |
6152 | else if (integer_zerop (max) || INT_CST_LT (max, integer_zero_node)) | |
0ecfe0b4 | 6153 | { |
4393e105 MM |
6154 | /* [temp.deduct] |
6155 | ||
6156 | Type deduction may fail for any of the following | |
6157 | reasons: | |
6158 | ||
bf8f3f93 MM |
6159 | Attempting to create an array with a size that is |
6160 | zero or negative. */ | |
4393e105 MM |
6161 | if (complain) |
6162 | cp_error ("creating array with size `%E'", max); | |
6163 | ||
6164 | return error_mark_node; | |
0ecfe0b4 JM |
6165 | } |
6166 | ||
337c90cc | 6167 | max = fold (build_binary_op (MINUS_EXPR, max, integer_one_node)); |
7ddedda4 MM |
6168 | if (!TREE_PERMANENT (max) && !allocation_temporary_p ()) |
6169 | max = copy_to_permanent (max); | |
120ecb8a | 6170 | return build_index_type (max); |
ae58fa02 MM |
6171 | } |
6172 | ||
6173 | case TEMPLATE_TYPE_PARM: | |
6174 | case TEMPLATE_TEMPLATE_PARM: | |
6175 | case TEMPLATE_PARM_INDEX: | |
6176 | { | |
6177 | int idx; | |
6178 | int level; | |
6179 | int levels; | |
0ecfe0b4 JM |
6180 | |
6181 | r = NULL_TREE; | |
ae58fa02 MM |
6182 | |
6183 | if (TREE_CODE (t) == TEMPLATE_TYPE_PARM | |
6184 | || TREE_CODE (t) == TEMPLATE_TEMPLATE_PARM) | |
6185 | { | |
6186 | idx = TEMPLATE_TYPE_IDX (t); | |
6187 | level = TEMPLATE_TYPE_LEVEL (t); | |
6188 | } | |
6189 | else | |
6190 | { | |
6191 | idx = TEMPLATE_PARM_IDX (t); | |
6192 | level = TEMPLATE_PARM_LEVEL (t); | |
6193 | } | |
6194 | ||
6195 | if (TREE_VEC_LENGTH (args) > 0) | |
6196 | { | |
6197 | tree arg = NULL_TREE; | |
6198 | ||
6199 | levels = TMPL_ARGS_DEPTH (args); | |
6200 | if (level <= levels) | |
6201 | arg = TMPL_ARG (args, level, idx); | |
6202 | ||
8b5b8b7c MM |
6203 | if (arg == error_mark_node) |
6204 | return error_mark_node; | |
6205 | else if (arg != NULL_TREE) | |
ae58fa02 MM |
6206 | { |
6207 | if (TREE_CODE (t) == TEMPLATE_TYPE_PARM) | |
6208 | { | |
6209 | my_friendly_assert (TREE_CODE_CLASS (TREE_CODE (arg)) | |
6210 | == 't', 0); | |
91063b51 MM |
6211 | return cp_build_qualified_type |
6212 | (arg, CP_TYPE_QUALS (arg) | CP_TYPE_QUALS (t)); | |
ae58fa02 MM |
6213 | } |
6214 | else if (TREE_CODE (t) == TEMPLATE_TEMPLATE_PARM) | |
6215 | { | |
7ddedda4 | 6216 | if (TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (t)) |
ae58fa02 MM |
6217 | { |
6218 | /* We are processing a type constructed from | |
6219 | a template template parameter */ | |
7ddedda4 | 6220 | tree argvec = tsubst (TYPE_TI_ARGS (t), |
4393e105 MM |
6221 | args, complain, in_decl); |
6222 | if (argvec == error_mark_node) | |
6223 | return error_mark_node; | |
6224 | ||
ae58fa02 MM |
6225 | /* We can get a TEMPLATE_TEMPLATE_PARM here when |
6226 | we are resolving nested-types in the signature of | |
6227 | a member function templates. | |
6228 | Otherwise ARG is a TEMPLATE_DECL and is the real | |
6229 | template to be instantiated. */ | |
6230 | if (TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM) | |
6231 | arg = TYPE_NAME (arg); | |
6232 | ||
6233 | r = lookup_template_class (DECL_NAME (arg), | |
6234 | argvec, in_decl, | |
6235 | DECL_CONTEXT (arg), | |
6236 | /*entering_scope=*/0); | |
91063b51 | 6237 | return cp_build_qualified_type (r, TYPE_QUALS (t)); |
ae58fa02 MM |
6238 | } |
6239 | else | |
6240 | /* We are processing a template argument list. */ | |
6241 | return arg; | |
6242 | } | |
6243 | else | |
6244 | return arg; | |
6245 | } | |
6246 | } | |
51924768 JM |
6247 | else |
6248 | my_friendly_abort (981018); | |
ae58fa02 MM |
6249 | |
6250 | if (level == 1) | |
6251 | /* This can happen during the attempted tsubst'ing in | |
6252 | unify. This means that we don't yet have any information | |
6253 | about the template parameter in question. */ | |
6254 | return t; | |
6255 | ||
6256 | /* If we get here, we must have been looking at a parm for a | |
6257 | more deeply nested template. Make a new version of this | |
6258 | template parameter, but with a lower level. */ | |
6259 | switch (TREE_CODE (t)) | |
6260 | { | |
6261 | case TEMPLATE_TYPE_PARM: | |
6262 | case TEMPLATE_TEMPLATE_PARM: | |
6263 | r = copy_node (t); | |
6264 | TEMPLATE_TYPE_PARM_INDEX (r) | |
6265 | = reduce_template_parm_level (TEMPLATE_TYPE_PARM_INDEX (t), | |
6266 | r, levels); | |
6267 | TYPE_STUB_DECL (r) = TYPE_NAME (r) = TEMPLATE_TYPE_DECL (r); | |
6268 | TYPE_MAIN_VARIANT (r) = r; | |
6269 | TYPE_POINTER_TO (r) = NULL_TREE; | |
6270 | TYPE_REFERENCE_TO (r) = NULL_TREE; | |
6271 | ||
6272 | if (TREE_CODE (t) == TEMPLATE_TEMPLATE_PARM | |
7ddedda4 | 6273 | && TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (t)) |
ae58fa02 | 6274 | { |
4393e105 MM |
6275 | tree argvec = tsubst (TYPE_TI_ARGS (t), args, |
6276 | complain, in_decl); | |
6277 | if (argvec == error_mark_node) | |
6278 | return error_mark_node; | |
6279 | ||
7ddedda4 | 6280 | TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (r) |
ae58fa02 MM |
6281 | = perm_tree_cons (TYPE_NAME (t), argvec, NULL_TREE); |
6282 | } | |
6283 | break; | |
6284 | ||
6285 | case TEMPLATE_PARM_INDEX: | |
6286 | r = reduce_template_parm_level (t, type, levels); | |
6287 | break; | |
6288 | ||
6289 | default: | |
6290 | my_friendly_abort (0); | |
6291 | } | |
6292 | ||
5566b478 | 6293 | return r; |
ae58fa02 | 6294 | } |
5566b478 | 6295 | |
8d08fdba MS |
6296 | case TREE_LIST: |
6297 | { | |
6298 | tree purpose, value, chain, result; | |
8d08fdba MS |
6299 | |
6300 | if (t == void_list_node) | |
6301 | return t; | |
6302 | ||
8d08fdba MS |
6303 | purpose = TREE_PURPOSE (t); |
6304 | if (purpose) | |
4393e105 MM |
6305 | { |
6306 | purpose = tsubst (purpose, args, complain, in_decl); | |
6307 | if (purpose == error_mark_node) | |
6308 | return error_mark_node; | |
6309 | } | |
8d08fdba MS |
6310 | value = TREE_VALUE (t); |
6311 | if (value) | |
4393e105 MM |
6312 | { |
6313 | value = tsubst (value, args, complain, in_decl); | |
6314 | if (value == error_mark_node) | |
6315 | return error_mark_node; | |
6316 | } | |
8d08fdba MS |
6317 | chain = TREE_CHAIN (t); |
6318 | if (chain && chain != void_type_node) | |
4393e105 MM |
6319 | { |
6320 | chain = tsubst (chain, args, complain, in_decl); | |
6321 | if (chain == error_mark_node) | |
6322 | return error_mark_node; | |
6323 | } | |
8d08fdba MS |
6324 | if (purpose == TREE_PURPOSE (t) |
6325 | && value == TREE_VALUE (t) | |
6326 | && chain == TREE_CHAIN (t)) | |
6327 | return t; | |
51632249 | 6328 | result = hash_tree_cons (purpose, value, chain); |
8d08fdba MS |
6329 | TREE_PARMLIST (result) = TREE_PARMLIST (t); |
6330 | return result; | |
6331 | } | |
6332 | case TREE_VEC: | |
5566b478 MS |
6333 | if (type != NULL_TREE) |
6334 | { | |
1ceaad38 JM |
6335 | /* A binfo node. We always need to make a copy, of the node |
6336 | itself and of its BINFO_BASETYPES. */ | |
85b71cf2 | 6337 | |
5566b478 MS |
6338 | t = copy_node (t); |
6339 | ||
c7449f2b JM |
6340 | /* Make sure type isn't a typedef copy. */ |
6341 | type = BINFO_TYPE (TYPE_BINFO (type)); | |
6342 | ||
5566b478 | 6343 | TREE_TYPE (t) = complete_type (type); |
6633d636 MS |
6344 | if (IS_AGGR_TYPE (type)) |
6345 | { | |
6346 | BINFO_VTABLE (t) = TYPE_BINFO_VTABLE (type); | |
6347 | BINFO_VIRTUALS (t) = TYPE_BINFO_VIRTUALS (type); | |
6348 | if (TYPE_BINFO_BASETYPES (type) != NULL_TREE) | |
6349 | BINFO_BASETYPES (t) = copy_node (TYPE_BINFO_BASETYPES (type)); | |
6350 | } | |
5566b478 MS |
6351 | return t; |
6352 | } | |
85b71cf2 JM |
6353 | |
6354 | /* Otherwise, a vector of template arguments. */ | |
4393e105 | 6355 | return tsubst_template_arg_vector (t, args, complain); |
8d08fdba | 6356 | |
8d08fdba MS |
6357 | case POINTER_TYPE: |
6358 | case REFERENCE_TYPE: | |
6359 | { | |
8d08fdba | 6360 | enum tree_code code; |
79a7c7fa | 6361 | |
8d08fdba MS |
6362 | if (type == TREE_TYPE (t)) |
6363 | return t; | |
6364 | ||
6365 | code = TREE_CODE (t); | |
4393e105 MM |
6366 | |
6367 | ||
6368 | /* [temp.deduct] | |
6369 | ||
6370 | Type deduction may fail for any of the following | |
6371 | reasons: | |
6372 | ||
6373 | -- Attempting to create a pointer to reference type. | |
6374 | -- Attempting to create a reference to a reference type or | |
6375 | a reference to void. */ | |
0ecfe0b4 JM |
6376 | if (TREE_CODE (type) == REFERENCE_TYPE |
6377 | || (code == REFERENCE_TYPE && TREE_CODE (type) == VOID_TYPE)) | |
79a7c7fa JM |
6378 | { |
6379 | static int last_line = 0; | |
6380 | static char* last_file = 0; | |
6381 | ||
6382 | /* We keep track of the last time we issued this error | |
6383 | message to avoid spewing a ton of messages during a | |
6384 | single bad template instantiation. */ | |
4393e105 MM |
6385 | if (complain && (last_line != lineno || |
6386 | last_file != input_filename)) | |
79a7c7fa | 6387 | { |
0ecfe0b4 JM |
6388 | if (TREE_CODE (type) == VOID_TYPE) |
6389 | cp_error ("forming reference to void"); | |
6390 | else | |
6391 | cp_error ("forming %s to reference type `%T'", | |
6392 | (code == POINTER_TYPE) ? "pointer" : "reference", | |
6393 | type); | |
79a7c7fa JM |
6394 | last_line = lineno; |
6395 | last_file = input_filename; | |
6396 | } | |
6397 | ||
4393e105 | 6398 | return error_mark_node; |
79a7c7fa JM |
6399 | } |
6400 | else if (code == POINTER_TYPE) | |
8d08fdba MS |
6401 | r = build_pointer_type (type); |
6402 | else | |
6403 | r = build_reference_type (type); | |
91063b51 | 6404 | r = cp_build_qualified_type (r, TYPE_QUALS (t)); |
79a7c7fa | 6405 | |
8d08fdba MS |
6406 | /* Will this ever be needed for TYPE_..._TO values? */ |
6407 | layout_type (r); | |
6408 | return r; | |
6409 | } | |
a4443a08 | 6410 | case OFFSET_TYPE: |
0ecfe0b4 | 6411 | { |
4393e105 MM |
6412 | r = tsubst (TYPE_OFFSET_BASETYPE (t), args, complain, in_decl); |
6413 | if (r == error_mark_node || !IS_AGGR_TYPE (r)) | |
6414 | { | |
6415 | /* [temp.deduct] | |
6416 | ||
6417 | Type deduction may fail for any of the following | |
6418 | reasons: | |
6419 | ||
6420 | -- Attempting to create "pointer to member of T" when T | |
6421 | is not a class type. */ | |
6422 | if (complain) | |
6423 | cp_error ("creating pointer to member of non-class type `%T'", | |
6424 | r); | |
6425 | return error_mark_node; | |
6426 | } | |
0ecfe0b4 JM |
6427 | return build_offset_type (r, type); |
6428 | } | |
8d08fdba MS |
6429 | case FUNCTION_TYPE: |
6430 | case METHOD_TYPE: | |
6431 | { | |
c11b6f21 | 6432 | tree fntype; |
4393e105 | 6433 | tree raises; |
8d08fdba | 6434 | |
4393e105 MM |
6435 | fntype = tsubst_function_type (t, args, complain, in_decl); |
6436 | if (fntype == error_mark_node) | |
6437 | return error_mark_node; | |
cabc336a MM |
6438 | |
6439 | /* Substitue the exception specification. */ | |
6440 | raises = TYPE_RAISES_EXCEPTIONS (t); | |
c11b6f21 MS |
6441 | if (raises) |
6442 | { | |
4393e105 MM |
6443 | raises = tsubst (raises, args, complain, in_decl); |
6444 | if (raises == error_mark_node) | |
6445 | return raises; | |
c11b6f21 MS |
6446 | fntype = build_exception_variant (fntype, raises); |
6447 | } | |
6448 | return fntype; | |
8d08fdba MS |
6449 | } |
6450 | case ARRAY_TYPE: | |
6451 | { | |
4393e105 MM |
6452 | tree domain = tsubst (TYPE_DOMAIN (t), args, complain, in_decl); |
6453 | if (domain == error_mark_node) | |
6454 | return error_mark_node; | |
6455 | ||
6456 | /* As an optimization, we avoid regenerating the array type if | |
6457 | it will obviously be the same as T. */ | |
8d08fdba MS |
6458 | if (type == TREE_TYPE (t) && domain == TYPE_DOMAIN (t)) |
6459 | return t; | |
0ecfe0b4 | 6460 | |
4393e105 MM |
6461 | /* These checks should match the ones in grokdeclarator. |
6462 | ||
6463 | [temp.deduct] | |
6464 | ||
6465 | The deduction may fail for any of the following reasons: | |
6466 | ||
6467 | -- Attempting to create an array with an element type that | |
6468 | is void, a function type, or a reference type. */ | |
6469 | if (TREE_CODE (type) == VOID_TYPE | |
6470 | || TREE_CODE (type) == FUNCTION_TYPE | |
6471 | || TREE_CODE (type) == REFERENCE_TYPE) | |
0ecfe0b4 | 6472 | { |
4393e105 MM |
6473 | if (complain) |
6474 | cp_error ("creating array of `%T'", type); | |
6475 | return error_mark_node; | |
0ecfe0b4 JM |
6476 | } |
6477 | ||
8d08fdba MS |
6478 | r = build_cplus_array_type (type, domain); |
6479 | return r; | |
6480 | } | |
6481 | ||
8d08fdba | 6482 | case PLUS_EXPR: |
5566b478 | 6483 | case MINUS_EXPR: |
4393e105 MM |
6484 | { |
6485 | tree e1 = tsubst (TREE_OPERAND (t, 0), args, complain, | |
6486 | in_decl); | |
6487 | tree e2 = tsubst (TREE_OPERAND (t, 1), args, complain, | |
6488 | in_decl); | |
6489 | ||
6490 | if (e1 == error_mark_node || e2 == error_mark_node) | |
6491 | return error_mark_node; | |
6492 | ||
6493 | return fold (build (TREE_CODE (t), TREE_TYPE (t), e1, e2)); | |
6494 | } | |
8d08fdba MS |
6495 | |
6496 | case NEGATE_EXPR: | |
6497 | case NOP_EXPR: | |
4393e105 MM |
6498 | { |
6499 | tree e = tsubst (TREE_OPERAND (t, 0), args, complain, | |
6500 | in_decl); | |
6501 | if (e == error_mark_node) | |
6502 | return error_mark_node; | |
6503 | ||
6504 | return fold (build (TREE_CODE (t), TREE_TYPE (t), e)); | |
6505 | } | |
8d08fdba | 6506 | |
5566b478 MS |
6507 | case TYPENAME_TYPE: |
6508 | { | |
4393e105 MM |
6509 | tree ctx = tsubst_aggr_type (TYPE_CONTEXT (t), args, complain, |
6510 | in_decl, /*entering_scope=*/1); | |
6511 | tree f = tsubst_copy (TYPENAME_TYPE_FULLNAME (t), args, | |
6512 | complain, in_decl); | |
6513 | ||
6514 | if (ctx == error_mark_node || f == error_mark_node) | |
6515 | return error_mark_node; | |
ae58fa02 | 6516 | |
bf8f3f93 MM |
6517 | if (!IS_AGGR_TYPE (ctx)) |
6518 | { | |
6519 | if (complain) | |
6520 | cp_error ("`%T' is not a class, struct, or union type", | |
6521 | ctx); | |
6522 | return error_mark_node; | |
6523 | } | |
6524 | else if (!uses_template_parms (ctx) && !TYPE_BEING_DEFINED (ctx)) | |
6525 | { | |
6526 | /* Normally, make_typename_type does not require that the CTX | |
6527 | have complete type in order to allow things like: | |
ae58fa02 | 6528 | |
bf8f3f93 | 6529 | template <class T> struct S { typename S<T>::X Y; }; |
ae58fa02 | 6530 | |
bf8f3f93 MM |
6531 | But, such constructs have already been resolved by this |
6532 | point, so here CTX really should have complete type, unless | |
6533 | it's a partial instantiation. */ | |
4393e105 MM |
6534 | ctx = complete_type (ctx); |
6535 | if (!TYPE_SIZE (ctx)) | |
6536 | { | |
6537 | if (complain) | |
6538 | incomplete_type_error (NULL_TREE, ctx); | |
6539 | return error_mark_node; | |
6540 | } | |
6541 | } | |
ae58fa02 | 6542 | |
b2b7d40a | 6543 | f = make_typename_type (ctx, f); |
f0bcd168 MM |
6544 | if (f == error_mark_node) |
6545 | return f; | |
91063b51 MM |
6546 | return cp_build_qualified_type (f, |
6547 | CP_TYPE_QUALS (f) | |
6548 | | CP_TYPE_QUALS (t)); | |
5566b478 MS |
6549 | } |
6550 | ||
6551 | case INDIRECT_REF: | |
4393e105 MM |
6552 | { |
6553 | tree e = tsubst (TREE_OPERAND (t, 0), args, complain, | |
6554 | in_decl); | |
6555 | if (e == error_mark_node) | |
6556 | return error_mark_node; | |
6557 | return make_pointer_declarator (type, e); | |
6558 | } | |
6559 | ||
5566b478 | 6560 | case ADDR_EXPR: |
4393e105 MM |
6561 | { |
6562 | tree e = tsubst (TREE_OPERAND (t, 0), args, complain, | |
6563 | in_decl); | |
6564 | if (e == error_mark_node) | |
6565 | return error_mark_node; | |
6566 | return make_reference_declarator (type, e); | |
6567 | } | |
5566b478 MS |
6568 | |
6569 | case ARRAY_REF: | |
4393e105 MM |
6570 | { |
6571 | tree e1 = tsubst (TREE_OPERAND (t, 0), args, complain, | |
6572 | in_decl); | |
6fb2c05a JM |
6573 | tree e2 = tsubst_expr (TREE_OPERAND (t, 1), args, complain, |
6574 | in_decl); | |
4393e105 MM |
6575 | if (e1 == error_mark_node || e2 == error_mark_node) |
6576 | return error_mark_node; | |
6577 | ||
6578 | return build_parse_node (ARRAY_REF, e1, e2, tsubst_expr); | |
6579 | } | |
5566b478 MS |
6580 | |
6581 | case CALL_EXPR: | |
4393e105 MM |
6582 | { |
6583 | tree e1 = tsubst (TREE_OPERAND (t, 0), args, complain, | |
6584 | in_decl); | |
6585 | tree e2 = tsubst_call_declarator_parms (TREE_OPERAND (t, 1), args, | |
6586 | complain, in_decl); | |
6587 | tree e3 = tsubst (TREE_TYPE (t), args, complain, in_decl); | |
6588 | ||
6589 | if (e1 == error_mark_node || e2 == error_mark_node | |
6590 | || e3 == error_mark_node) | |
6591 | return error_mark_node; | |
6592 | ||
6593 | return make_call_declarator (e1, e2, TREE_OPERAND (t, 2), e3); | |
6594 | } | |
5566b478 | 6595 | |
fc378698 | 6596 | case SCOPE_REF: |
4393e105 MM |
6597 | { |
6598 | tree e1 = tsubst (TREE_OPERAND (t, 0), args, complain, | |
6599 | in_decl); | |
6600 | tree e2 = tsubst (TREE_OPERAND (t, 1), args, complain, in_decl); | |
6601 | if (e1 == error_mark_node || e2 == error_mark_node) | |
6602 | return error_mark_node; | |
6603 | ||
6604 | return build_parse_node (TREE_CODE (t), e1, e2); | |
6605 | } | |
fc378698 | 6606 | |
b894fc05 | 6607 | case TYPEOF_TYPE: |
4393e105 MM |
6608 | { |
6609 | tree e1 = tsubst_expr (TYPE_FIELDS (t), args, complain, | |
6610 | in_decl); | |
6611 | if (e1 == error_mark_node) | |
6612 | return error_mark_node; | |
6613 | ||
6614 | return TREE_TYPE (e1); | |
6615 | } | |
b894fc05 | 6616 | |
8d08fdba | 6617 | default: |
5566b478 | 6618 | sorry ("use of `%s' in template", |
8d08fdba MS |
6619 | tree_code_name [(int) TREE_CODE (t)]); |
6620 | return error_mark_node; | |
6621 | } | |
6622 | } | |
6623 | ||
5566b478 MS |
6624 | void |
6625 | do_pushlevel () | |
6626 | { | |
6627 | emit_line_note (input_filename, lineno); | |
6628 | pushlevel (0); | |
6629 | clear_last_expr (); | |
6630 | push_momentary (); | |
6631 | expand_start_bindings (0); | |
6632 | } | |
6633 | ||
8d08fdba | 6634 | tree |
5566b478 | 6635 | do_poplevel () |
8d08fdba | 6636 | { |
5566b478 | 6637 | tree t; |
a703fb38 | 6638 | int saved_warn_unused = 0; |
8d08fdba | 6639 | |
85b71cf2 JM |
6640 | if (processing_template_decl) |
6641 | { | |
6642 | saved_warn_unused = warn_unused; | |
6643 | warn_unused = 0; | |
6644 | } | |
8baa713c | 6645 | expand_end_bindings (getdecls (), kept_level_p (), 0); |
85b71cf2 JM |
6646 | if (processing_template_decl) |
6647 | warn_unused = saved_warn_unused; | |
5566b478 MS |
6648 | t = poplevel (kept_level_p (), 1, 0); |
6649 | pop_momentary (); | |
6650 | return t; | |
6651 | } | |
8d08fdba | 6652 | |
00d3396f JM |
6653 | /* Like tsubst, but deals with expressions. This function just replaces |
6654 | template parms; to finish processing the resultant expression, use | |
6655 | tsubst_expr. */ | |
6656 | ||
5566b478 | 6657 | tree |
4393e105 | 6658 | tsubst_copy (t, args, complain, in_decl) |
98c1c668 | 6659 | tree t, args; |
4393e105 | 6660 | int complain; |
5566b478 MS |
6661 | tree in_decl; |
6662 | { | |
6663 | enum tree_code code; | |
8452b1d3 | 6664 | tree r; |
8d08fdba | 6665 | |
5566b478 MS |
6666 | if (t == NULL_TREE || t == error_mark_node) |
6667 | return t; | |
6668 | ||
6669 | code = TREE_CODE (t); | |
b7484fbe | 6670 | |
5566b478 MS |
6671 | switch (code) |
6672 | { | |
6673 | case PARM_DECL: | |
a759e627 | 6674 | return do_identifier (DECL_NAME (t), 0, NULL_TREE); |
5566b478 MS |
6675 | |
6676 | case CONST_DECL: | |
ed44da02 MM |
6677 | { |
6678 | tree enum_type; | |
6679 | tree v; | |
6680 | ||
6681 | if (!DECL_CONTEXT (t)) | |
6682 | /* This is a global enumeration constant. */ | |
6683 | return t; | |
6684 | ||
6685 | /* Unfortunately, we cannot just call lookup_name here. | |
6686 | Consider: | |
6687 | ||
6688 | template <int I> int f() { | |
6689 | enum E { a = I }; | |
6690 | struct S { void g() { E e = a; } }; | |
6691 | }; | |
6692 | ||
6693 | When we instantiate f<7>::S::g(), say, lookup_name is not | |
6694 | clever enough to find f<7>::a. */ | |
6695 | enum_type | |
4393e105 | 6696 | = tsubst_aggr_type (TREE_TYPE (t), args, complain, in_decl, |
ed44da02 MM |
6697 | /*entering_scope=*/0); |
6698 | ||
6699 | for (v = TYPE_VALUES (enum_type); | |
6700 | v != NULL_TREE; | |
6701 | v = TREE_CHAIN (v)) | |
6702 | if (TREE_PURPOSE (v) == DECL_NAME (t)) | |
6703 | return TREE_VALUE (v); | |
6704 | ||
6705 | /* We didn't find the name. That should never happen; if | |
6706 | name-lookup found it during preliminary parsing, we | |
6707 | should find it again here during instantiation. */ | |
6708 | my_friendly_abort (0); | |
6709 | } | |
db04386f | 6710 | return t; |
ed44da02 | 6711 | |
5566b478 MS |
6712 | case FIELD_DECL: |
6713 | if (DECL_CONTEXT (t)) | |
6714 | { | |
0978790f | 6715 | tree ctx; |
0978790f | 6716 | |
4393e105 | 6717 | ctx = tsubst_aggr_type (DECL_CONTEXT (t), args, complain, in_decl, |
36a117a5 | 6718 | /*entering_scope=*/1); |
0978790f | 6719 | if (ctx != DECL_CONTEXT (t)) |
5566b478 MS |
6720 | return lookup_field (ctx, DECL_NAME (t), 0, 0); |
6721 | } | |
6722 | return t; | |
6723 | ||
6724 | case VAR_DECL: | |
6725 | case FUNCTION_DECL: | |
6726 | if (DECL_LANG_SPECIFIC (t) && DECL_TEMPLATE_INFO (t)) | |
4393e105 | 6727 | t = tsubst (t, args, complain, in_decl); |
5566b478 MS |
6728 | mark_used (t); |
6729 | return t; | |
6730 | ||
98c1c668 JM |
6731 | case TEMPLATE_DECL: |
6732 | if (is_member_template (t)) | |
4393e105 | 6733 | return tsubst (t, args, complain, in_decl); |
98c1c668 JM |
6734 | else |
6735 | return t; | |
6736 | ||
672476cb MM |
6737 | case LOOKUP_EXPR: |
6738 | { | |
6739 | /* We must tsbust into a LOOKUP_EXPR in case the names to | |
6740 | which it refers is a conversion operator; in that case the | |
6741 | name will change. We avoid making unnecessary copies, | |
6742 | however. */ | |
6743 | ||
4393e105 | 6744 | tree id = tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl); |
672476cb MM |
6745 | |
6746 | if (id != TREE_OPERAND (t, 0)) | |
6747 | { | |
8452b1d3 | 6748 | r = build_nt (LOOKUP_EXPR, id); |
672476cb MM |
6749 | LOOKUP_EXPR_GLOBAL (r) = LOOKUP_EXPR_GLOBAL (t); |
6750 | t = r; | |
6751 | } | |
6752 | ||
6753 | return t; | |
6754 | } | |
6755 | ||
5566b478 MS |
6756 | case CAST_EXPR: |
6757 | case REINTERPRET_CAST_EXPR: | |
e92cc029 MS |
6758 | case CONST_CAST_EXPR: |
6759 | case STATIC_CAST_EXPR: | |
6760 | case DYNAMIC_CAST_EXPR: | |
51924768 | 6761 | case NOP_EXPR: |
5566b478 | 6762 | return build1 |
4393e105 MM |
6763 | (code, tsubst (TREE_TYPE (t), args, complain, in_decl), |
6764 | tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl)); | |
5566b478 MS |
6765 | |
6766 | case INDIRECT_REF: | |
6767 | case PREDECREMENT_EXPR: | |
6768 | case PREINCREMENT_EXPR: | |
6769 | case POSTDECREMENT_EXPR: | |
6770 | case POSTINCREMENT_EXPR: | |
6771 | case NEGATE_EXPR: | |
6772 | case TRUTH_NOT_EXPR: | |
b87692e5 | 6773 | case BIT_NOT_EXPR: |
5566b478 MS |
6774 | case ADDR_EXPR: |
6775 | case CONVERT_EXPR: /* Unary + */ | |
6776 | case SIZEOF_EXPR: | |
abff8e06 | 6777 | case ALIGNOF_EXPR: |
5566b478 | 6778 | case ARROW_EXPR: |
fc378698 | 6779 | case THROW_EXPR: |
5156628f | 6780 | case TYPEID_EXPR: |
5566b478 | 6781 | return build1 |
6a629cac | 6782 | (code, tsubst (TREE_TYPE (t), args, complain, in_decl), |
4393e105 | 6783 | tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl)); |
5566b478 MS |
6784 | |
6785 | case PLUS_EXPR: | |
6786 | case MINUS_EXPR: | |
6787 | case MULT_EXPR: | |
6788 | case TRUNC_DIV_EXPR: | |
6789 | case CEIL_DIV_EXPR: | |
6790 | case FLOOR_DIV_EXPR: | |
6791 | case ROUND_DIV_EXPR: | |
6792 | case EXACT_DIV_EXPR: | |
6793 | case BIT_AND_EXPR: | |
6794 | case BIT_ANDTC_EXPR: | |
6795 | case BIT_IOR_EXPR: | |
6796 | case BIT_XOR_EXPR: | |
6797 | case TRUNC_MOD_EXPR: | |
6798 | case FLOOR_MOD_EXPR: | |
6799 | case TRUTH_ANDIF_EXPR: | |
6800 | case TRUTH_ORIF_EXPR: | |
6801 | case TRUTH_AND_EXPR: | |
6802 | case TRUTH_OR_EXPR: | |
6803 | case RSHIFT_EXPR: | |
6804 | case LSHIFT_EXPR: | |
6805 | case RROTATE_EXPR: | |
6806 | case LROTATE_EXPR: | |
6807 | case EQ_EXPR: | |
6808 | case NE_EXPR: | |
6809 | case MAX_EXPR: | |
6810 | case MIN_EXPR: | |
6811 | case LE_EXPR: | |
6812 | case GE_EXPR: | |
6813 | case LT_EXPR: | |
6814 | case GT_EXPR: | |
6815 | case COMPONENT_REF: | |
6816 | case ARRAY_REF: | |
6817 | case COMPOUND_EXPR: | |
6818 | case SCOPE_REF: | |
6819 | case DOTSTAR_EXPR: | |
6820 | case MEMBER_REF: | |
6821 | return build_nt | |
4393e105 MM |
6822 | (code, tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl), |
6823 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl)); | |
5566b478 MS |
6824 | |
6825 | case CALL_EXPR: | |
6826 | { | |
6827 | tree fn = TREE_OPERAND (t, 0); | |
f84b4be9 | 6828 | if (is_overloaded_fn (fn)) |
4393e105 | 6829 | fn = tsubst_copy (get_first_fn (fn), args, complain, in_decl); |
5566b478 | 6830 | else |
f84b4be9 | 6831 | /* Sometimes FN is a LOOKUP_EXPR. */ |
4393e105 | 6832 | fn = tsubst_copy (fn, args, complain, in_decl); |
5566b478 | 6833 | return build_nt |
4393e105 MM |
6834 | (code, fn, tsubst_copy (TREE_OPERAND (t, 1), args, complain, |
6835 | in_decl), | |
5566b478 MS |
6836 | NULL_TREE); |
6837 | } | |
6838 | ||
6839 | case METHOD_CALL_EXPR: | |
6840 | { | |
6841 | tree name = TREE_OPERAND (t, 0); | |
6842 | if (TREE_CODE (name) == BIT_NOT_EXPR) | |
6843 | { | |
4393e105 MM |
6844 | name = tsubst_copy (TREE_OPERAND (name, 0), args, |
6845 | complain, in_decl); | |
7bae46f4 | 6846 | name = build1 (BIT_NOT_EXPR, NULL_TREE, name); |
5566b478 MS |
6847 | } |
6848 | else if (TREE_CODE (name) == SCOPE_REF | |
6849 | && TREE_CODE (TREE_OPERAND (name, 1)) == BIT_NOT_EXPR) | |
6850 | { | |
4393e105 MM |
6851 | tree base = tsubst_copy (TREE_OPERAND (name, 0), args, |
6852 | complain, in_decl); | |
5566b478 | 6853 | name = TREE_OPERAND (name, 1); |
4393e105 MM |
6854 | name = tsubst_copy (TREE_OPERAND (name, 0), args, |
6855 | complain, in_decl); | |
11686454 | 6856 | name = build1 (BIT_NOT_EXPR, NULL_TREE, name); |
5566b478 MS |
6857 | name = build_nt (SCOPE_REF, base, name); |
6858 | } | |
6859 | else | |
4393e105 | 6860 | name = tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl); |
5566b478 | 6861 | return build_nt |
4393e105 MM |
6862 | (code, name, tsubst_copy (TREE_OPERAND (t, 1), args, |
6863 | complain, in_decl), | |
6864 | tsubst_copy (TREE_OPERAND (t, 2), args, complain, in_decl), | |
5566b478 MS |
6865 | NULL_TREE); |
6866 | } | |
6867 | ||
67da3287 | 6868 | case BIND_EXPR: |
5566b478 MS |
6869 | case COND_EXPR: |
6870 | case MODOP_EXPR: | |
67da3287 | 6871 | { |
8452b1d3 | 6872 | r = build_nt |
4393e105 MM |
6873 | (code, tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl), |
6874 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl), | |
6875 | tsubst_copy (TREE_OPERAND (t, 2), args, complain, in_decl)); | |
67da3287 MM |
6876 | |
6877 | if (code == BIND_EXPR && !processing_template_decl) | |
6878 | { | |
61cd552e | 6879 | /* This processing should really occur in tsubst_expr, |
67da3287 MM |
6880 | However, tsubst_expr does not recurse into expressions, |
6881 | since it assumes that there aren't any statements | |
6882 | inside them. Instead, it simply calls | |
6883 | build_expr_from_tree. So, we need to expand the | |
6884 | BIND_EXPR here. */ | |
b4c4a9ec | 6885 | tree rtl_expr = begin_stmt_expr (); |
4393e105 MM |
6886 | tree block = tsubst_expr (TREE_OPERAND (r, 1), args, |
6887 | complain, in_decl); | |
b4c4a9ec | 6888 | r = finish_stmt_expr (rtl_expr, block); |
67da3287 MM |
6889 | } |
6890 | ||
6891 | return r; | |
6892 | } | |
5566b478 MS |
6893 | |
6894 | case NEW_EXPR: | |
6895 | { | |
8452b1d3 | 6896 | r = build_nt |
4393e105 MM |
6897 | (code, tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl), |
6898 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl), | |
6899 | tsubst_copy (TREE_OPERAND (t, 2), args, complain, in_decl)); | |
5566b478 MS |
6900 | NEW_EXPR_USE_GLOBAL (r) = NEW_EXPR_USE_GLOBAL (t); |
6901 | return r; | |
6902 | } | |
6903 | ||
6904 | case DELETE_EXPR: | |
6905 | { | |
8452b1d3 | 6906 | r = build_nt |
4393e105 MM |
6907 | (code, tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl), |
6908 | tsubst_copy (TREE_OPERAND (t, 1), args, complain, in_decl)); | |
5566b478 MS |
6909 | DELETE_EXPR_USE_GLOBAL (r) = DELETE_EXPR_USE_GLOBAL (t); |
6910 | DELETE_EXPR_USE_VEC (r) = DELETE_EXPR_USE_VEC (t); | |
6911 | return r; | |
6912 | } | |
6913 | ||
386b8a85 JM |
6914 | case TEMPLATE_ID_EXPR: |
6915 | { | |
00d3396f | 6916 | /* Substituted template arguments */ |
4393e105 MM |
6917 | tree targs = tsubst_copy (TREE_OPERAND (t, 1), args, complain, |
6918 | in_decl); | |
856216bb MM |
6919 | |
6920 | if (targs && TREE_CODE (targs) == TREE_LIST) | |
6921 | { | |
6922 | tree chain; | |
6923 | for (chain = targs; chain; chain = TREE_CHAIN (chain)) | |
6924 | TREE_VALUE (chain) = maybe_fold_nontype_arg (TREE_VALUE (chain)); | |
6925 | } | |
6926 | else if (targs) | |
6927 | { | |
6928 | int i; | |
6929 | for (i = 0; i < TREE_VEC_LENGTH (targs); ++i) | |
6930 | TREE_VEC_ELT (targs, i) | |
6931 | = maybe_fold_nontype_arg (TREE_VEC_ELT (targs, i)); | |
6932 | } | |
00d3396f JM |
6933 | |
6934 | return lookup_template_function | |
4393e105 | 6935 | (tsubst_copy (TREE_OPERAND (t, 0), args, complain, in_decl), targs); |
386b8a85 JM |
6936 | } |
6937 | ||
5566b478 MS |
6938 | case TREE_LIST: |
6939 | { | |
6940 | tree purpose, value, chain; | |
6941 | ||
6942 | if (t == void_list_node) | |
6943 | return t; | |
6944 | ||
6945 | purpose = TREE_PURPOSE (t); | |
6946 | if (purpose) | |
4393e105 | 6947 | purpose = tsubst_copy (purpose, args, complain, in_decl); |
5566b478 MS |
6948 | value = TREE_VALUE (t); |
6949 | if (value) | |
4393e105 | 6950 | value = tsubst_copy (value, args, complain, in_decl); |
5566b478 MS |
6951 | chain = TREE_CHAIN (t); |
6952 | if (chain && chain != void_type_node) | |
4393e105 | 6953 | chain = tsubst_copy (chain, args, complain, in_decl); |
5566b478 MS |
6954 | if (purpose == TREE_PURPOSE (t) |
6955 | && value == TREE_VALUE (t) | |
6956 | && chain == TREE_CHAIN (t)) | |
6957 | return t; | |
6958 | return tree_cons (purpose, value, chain); | |
6959 | } | |
6960 | ||
6961 | case RECORD_TYPE: | |
6962 | case UNION_TYPE: | |
6963 | case ENUMERAL_TYPE: | |
6964 | case INTEGER_TYPE: | |
6965 | case TEMPLATE_TYPE_PARM: | |
73b0fce8 | 6966 | case TEMPLATE_TEMPLATE_PARM: |
f84b4be9 | 6967 | case TEMPLATE_PARM_INDEX: |
5566b478 MS |
6968 | case POINTER_TYPE: |
6969 | case REFERENCE_TYPE: | |
6970 | case OFFSET_TYPE: | |
6971 | case FUNCTION_TYPE: | |
6972 | case METHOD_TYPE: | |
6973 | case ARRAY_TYPE: | |
6974 | case TYPENAME_TYPE: | |
f84b4be9 | 6975 | case TYPE_DECL: |
4393e105 | 6976 | return tsubst (t, args, complain, in_decl); |
5566b478 | 6977 | |
e92cc029 | 6978 | case IDENTIFIER_NODE: |
8e710788 BK |
6979 | if (IDENTIFIER_TYPENAME_P (t) |
6980 | /* Make sure it's not just a variable named `__opr', for instance, | |
6981 | which can occur in some existing code. */ | |
6982 | && TREE_TYPE (t)) | |
e92cc029 | 6983 | return build_typename_overload |
4393e105 | 6984 | (tsubst (TREE_TYPE (t), args, complain, in_decl)); |
e92cc029 MS |
6985 | else |
6986 | return t; | |
6987 | ||
5156628f | 6988 | case CONSTRUCTOR: |
8452b1d3 JM |
6989 | { |
6990 | r = build | |
4393e105 MM |
6991 | (CONSTRUCTOR, tsubst (TREE_TYPE (t), args, complain, in_decl), |
6992 | NULL_TREE, tsubst_copy (CONSTRUCTOR_ELTS (t), args, | |
6993 | complain, in_decl)); | |
8452b1d3 JM |
6994 | TREE_HAS_CONSTRUCTOR (r) = TREE_HAS_CONSTRUCTOR (t); |
6995 | return r; | |
6996 | } | |
5156628f | 6997 | |
5566b478 MS |
6998 | default: |
6999 | return t; | |
7000 | } | |
7001 | } | |
7002 | ||
00d3396f JM |
7003 | /* Like tsubst_copy, but also does semantic processing and RTL expansion. */ |
7004 | ||
5566b478 | 7005 | tree |
4393e105 | 7006 | tsubst_expr (t, args, complain, in_decl) |
98c1c668 | 7007 | tree t, args; |
4393e105 | 7008 | int complain; |
5566b478 MS |
7009 | tree in_decl; |
7010 | { | |
7011 | if (t == NULL_TREE || t == error_mark_node) | |
7012 | return t; | |
7013 | ||
5156628f | 7014 | if (processing_template_decl) |
4393e105 | 7015 | return tsubst_copy (t, args, complain, in_decl); |
5566b478 MS |
7016 | |
7017 | switch (TREE_CODE (t)) | |
8d08fdba | 7018 | { |
5566b478 MS |
7019 | case RETURN_STMT: |
7020 | lineno = TREE_COMPLEXITY (t); | |
ad321293 | 7021 | finish_return_stmt (tsubst_expr (RETURN_EXPR (t), |
4393e105 | 7022 | args, complain, in_decl)); |
5566b478 MS |
7023 | break; |
7024 | ||
7025 | case EXPR_STMT: | |
7026 | lineno = TREE_COMPLEXITY (t); | |
ad321293 | 7027 | finish_expr_stmt (tsubst_expr (EXPR_STMT_EXPR (t), |
4393e105 | 7028 | args, complain, in_decl)); |
5566b478 MS |
7029 | break; |
7030 | ||
7031 | case DECL_STMT: | |
7032 | { | |
7033 | int i = suspend_momentary (); | |
67d743fe | 7034 | tree dcl, init; |
5566b478 MS |
7035 | |
7036 | lineno = TREE_COMPLEXITY (t); | |
7037 | emit_line_note (input_filename, lineno); | |
7038 | dcl = start_decl | |
4393e105 MM |
7039 | (tsubst (TREE_OPERAND (t, 0), args, complain, in_decl), |
7040 | tsubst (TREE_OPERAND (t, 1), args, complain, in_decl), | |
a1774733 | 7041 | TREE_OPERAND (t, 2) != 0, NULL_TREE, NULL_TREE); |
4393e105 | 7042 | init = tsubst_expr (TREE_OPERAND (t, 2), args, complain, in_decl); |
5566b478 | 7043 | cp_finish_decl |
a0128b67 | 7044 | (dcl, init, NULL_TREE, 1, /*init ? LOOKUP_ONLYCONVERTING :*/ 0); |
5566b478 MS |
7045 | resume_momentary (i); |
7046 | return dcl; | |
7047 | } | |
8d08fdba | 7048 | |
5566b478 MS |
7049 | case FOR_STMT: |
7050 | { | |
7051 | tree tmp; | |
5566b478 | 7052 | lineno = TREE_COMPLEXITY (t); |
5566b478 | 7053 | |
ad321293 MM |
7054 | begin_for_stmt (); |
7055 | for (tmp = FOR_INIT_STMT (t); tmp; tmp = TREE_CHAIN (tmp)) | |
4393e105 | 7056 | tsubst_expr (tmp, args, complain, in_decl); |
ad321293 MM |
7057 | finish_for_init_stmt (NULL_TREE); |
7058 | finish_for_cond (tsubst_expr (FOR_COND (t), args, | |
4393e105 | 7059 | complain, in_decl), |
ad321293 | 7060 | NULL_TREE); |
4393e105 | 7061 | tmp = tsubst_expr (FOR_EXPR (t), args, complain, in_decl); |
ad321293 | 7062 | finish_for_expr (tmp, NULL_TREE); |
4393e105 | 7063 | tsubst_expr (FOR_BODY (t), args, complain, in_decl); |
ad321293 | 7064 | finish_for_stmt (tmp, NULL_TREE); |
5566b478 MS |
7065 | } |
7066 | break; | |
8d08fdba | 7067 | |
5566b478 MS |
7068 | case WHILE_STMT: |
7069 | { | |
5566b478 | 7070 | lineno = TREE_COMPLEXITY (t); |
ad321293 MM |
7071 | begin_while_stmt (); |
7072 | finish_while_stmt_cond (tsubst_expr (WHILE_COND (t), | |
4393e105 | 7073 | args, complain, in_decl), |
ad321293 | 7074 | NULL_TREE); |
4393e105 | 7075 | tsubst_expr (WHILE_BODY (t), args, complain, in_decl); |
ad321293 | 7076 | finish_while_stmt (NULL_TREE); |
5566b478 MS |
7077 | } |
7078 | break; | |
8d08fdba | 7079 | |
5566b478 MS |
7080 | case DO_STMT: |
7081 | { | |
5566b478 | 7082 | lineno = TREE_COMPLEXITY (t); |
ad321293 | 7083 | begin_do_stmt (); |
4393e105 | 7084 | tsubst_expr (DO_BODY (t), args, complain, in_decl); |
ad321293 MM |
7085 | finish_do_body (NULL_TREE); |
7086 | finish_do_stmt (tsubst_expr (DO_COND (t), args, | |
4393e105 | 7087 | complain, in_decl), |
ad321293 | 7088 | NULL_TREE); |
5566b478 MS |
7089 | } |
7090 | break; | |
a0a33927 | 7091 | |
5566b478 | 7092 | case IF_STMT: |
8d08fdba | 7093 | { |
5566b478 | 7094 | tree tmp; |
5566b478 MS |
7095 | |
7096 | lineno = TREE_COMPLEXITY (t); | |
ad321293 MM |
7097 | begin_if_stmt (); |
7098 | finish_if_stmt_cond (tsubst_expr (IF_COND (t), | |
4393e105 | 7099 | args, complain, in_decl), |
ad321293 | 7100 | NULL_TREE); |
db5ae43f | 7101 | |
ad321293 | 7102 | if (tmp = THEN_CLAUSE (t), tmp) |
db5ae43f | 7103 | { |
4393e105 | 7104 | tsubst_expr (tmp, args, complain, in_decl); |
ad321293 | 7105 | finish_then_clause (NULL_TREE); |
db5ae43f MS |
7106 | } |
7107 | ||
ad321293 MM |
7108 | if (tmp = ELSE_CLAUSE (t), tmp) |
7109 | { | |
7110 | begin_else_clause (); | |
4393e105 | 7111 | tsubst_expr (tmp, args, complain, in_decl); |
ad321293 MM |
7112 | finish_else_clause (NULL_TREE); |
7113 | } | |
8d08fdba | 7114 | |
ad321293 | 7115 | finish_if_stmt (); |
8d08fdba | 7116 | } |
5566b478 | 7117 | break; |
8d08fdba | 7118 | |
5566b478 MS |
7119 | case COMPOUND_STMT: |
7120 | { | |
ad321293 | 7121 | tree substmt; |
8d08fdba | 7122 | |
5566b478 | 7123 | lineno = TREE_COMPLEXITY (t); |
ad321293 MM |
7124 | begin_compound_stmt (COMPOUND_STMT_NO_SCOPE (t)); |
7125 | for (substmt = COMPOUND_BODY (t); | |
7126 | substmt != NULL_TREE; | |
7127 | substmt = TREE_CHAIN (substmt)) | |
4393e105 | 7128 | tsubst_expr (substmt, args, complain, in_decl); |
ad321293 MM |
7129 | return finish_compound_stmt (COMPOUND_STMT_NO_SCOPE (t), |
7130 | NULL_TREE); | |
5566b478 MS |
7131 | } |
7132 | break; | |
8d08fdba | 7133 | |
5566b478 MS |
7134 | case BREAK_STMT: |
7135 | lineno = TREE_COMPLEXITY (t); | |
ad321293 | 7136 | finish_break_stmt (); |
5566b478 | 7137 | break; |
8d08fdba | 7138 | |
6467930b MS |
7139 | case CONTINUE_STMT: |
7140 | lineno = TREE_COMPLEXITY (t); | |
ad321293 | 7141 | finish_continue_stmt (); |
6467930b MS |
7142 | break; |
7143 | ||
5566b478 MS |
7144 | case SWITCH_STMT: |
7145 | { | |
7146 | tree val, tmp; | |
5566b478 MS |
7147 | |
7148 | lineno = TREE_COMPLEXITY (t); | |
ad321293 | 7149 | begin_switch_stmt (); |
4393e105 | 7150 | val = tsubst_expr (SWITCH_COND (t), args, complain, in_decl); |
ad321293 | 7151 | finish_switch_cond (val); |
5566b478 MS |
7152 | |
7153 | if (tmp = TREE_OPERAND (t, 1), tmp) | |
4393e105 | 7154 | tsubst_expr (tmp, args, complain, in_decl); |
8d08fdba | 7155 | |
ad321293 | 7156 | finish_switch_stmt (val, NULL_TREE); |
5566b478 MS |
7157 | } |
7158 | break; | |
7159 | ||
7160 | case CASE_LABEL: | |
4393e105 MM |
7161 | finish_case_label (tsubst_expr (CASE_LOW (t), args, complain, in_decl), |
7162 | tsubst_expr (CASE_HIGH (t), args, complain, in_decl)); | |
5566b478 MS |
7163 | break; |
7164 | ||
7165 | case LABEL_DECL: | |
7166 | t = define_label (DECL_SOURCE_FILE (t), DECL_SOURCE_LINE (t), | |
7167 | DECL_NAME (t)); | |
7168 | if (t) | |
7169 | expand_label (t); | |
7170 | break; | |
7171 | ||
7172 | case GOTO_STMT: | |
7173 | lineno = TREE_COMPLEXITY (t); | |
aa09da44 MM |
7174 | t = GOTO_DESTINATION (t); |
7175 | if (TREE_CODE (t) != IDENTIFIER_NODE) | |
7176 | /* Computed goto's must be tsubst'd into. On the other hand, | |
7177 | non-computed gotos must not be; the identifier in question | |
7178 | will have no binding. */ | |
4393e105 | 7179 | t = tsubst_expr (t, args, complain, in_decl); |
aa09da44 | 7180 | finish_goto_stmt (t); |
ad321293 MM |
7181 | break; |
7182 | ||
7183 | case ASM_STMT: | |
7184 | lineno = TREE_COMPLEXITY (t); | |
4393e105 MM |
7185 | finish_asm_stmt (tsubst_expr (ASM_CV_QUAL (t), args, complain, in_decl), |
7186 | tsubst_expr (ASM_STRING (t), args, complain, in_decl), | |
7187 | tsubst_expr (ASM_OUTPUTS (t), args, complain, in_decl), | |
7188 | tsubst_expr (ASM_INPUTS (t), args, complain, in_decl), | |
7189 | tsubst_expr (ASM_CLOBBERS (t), args, complain, | |
7190 | in_decl)); | |
5566b478 | 7191 | break; |
faf5394a MS |
7192 | |
7193 | case TRY_BLOCK: | |
7194 | lineno = TREE_COMPLEXITY (t); | |
ad321293 | 7195 | begin_try_block (); |
4393e105 | 7196 | tsubst_expr (TRY_STMTS (t), args, complain, in_decl); |
ad321293 | 7197 | finish_try_block (NULL_TREE); |
faf5394a | 7198 | { |
ad321293 | 7199 | tree handler = TRY_HANDLERS (t); |
faf5394a | 7200 | for (; handler; handler = TREE_CHAIN (handler)) |
4393e105 | 7201 | tsubst_expr (handler, args, complain, in_decl); |
faf5394a | 7202 | } |
ad321293 | 7203 | finish_handler_sequence (NULL_TREE); |
faf5394a MS |
7204 | break; |
7205 | ||
7206 | case HANDLER: | |
7207 | lineno = TREE_COMPLEXITY (t); | |
ad321293 MM |
7208 | begin_handler (); |
7209 | if (HANDLER_PARMS (t)) | |
faf5394a | 7210 | { |
ad321293 | 7211 | tree d = HANDLER_PARMS (t); |
faf5394a | 7212 | expand_start_catch_block |
4393e105 MM |
7213 | (tsubst (TREE_OPERAND (d, 1), args, complain, in_decl), |
7214 | tsubst (TREE_OPERAND (d, 0), args, complain, in_decl)); | |
faf5394a MS |
7215 | } |
7216 | else | |
7217 | expand_start_catch_block (NULL_TREE, NULL_TREE); | |
ad321293 | 7218 | finish_handler_parms (NULL_TREE); |
4393e105 | 7219 | tsubst_expr (HANDLER_BODY (t), args, complain, in_decl); |
ad321293 | 7220 | finish_handler (NULL_TREE); |
faf5394a MS |
7221 | break; |
7222 | ||
b87692e5 MS |
7223 | case TAG_DEFN: |
7224 | lineno = TREE_COMPLEXITY (t); | |
7225 | t = TREE_TYPE (t); | |
7226 | if (TREE_CODE (t) == ENUMERAL_TYPE) | |
4393e105 | 7227 | tsubst (t, args, complain, NULL_TREE); |
b87692e5 MS |
7228 | break; |
7229 | ||
5566b478 | 7230 | default: |
4393e105 | 7231 | return build_expr_from_tree (tsubst_copy (t, args, complain, in_decl)); |
5566b478 MS |
7232 | } |
7233 | return NULL_TREE; | |
8d08fdba MS |
7234 | } |
7235 | ||
6ba89f8e | 7236 | /* Instantiate the indicated variable or function template TMPL with |
36a117a5 MM |
7237 | the template arguments in TARG_PTR. */ |
7238 | ||
5566b478 MS |
7239 | tree |
7240 | instantiate_template (tmpl, targ_ptr) | |
98c1c668 | 7241 | tree tmpl, targ_ptr; |
8d08fdba | 7242 | { |
5566b478 | 7243 | tree fndecl; |
36a117a5 MM |
7244 | tree gen_tmpl; |
7245 | tree spec; | |
5566b478 MS |
7246 | int i, len; |
7247 | struct obstack *old_fmp_obstack; | |
7248 | extern struct obstack *function_maybepermanent_obstack; | |
36a117a5 | 7249 | tree inner_args; |
5566b478 | 7250 | |
27fafc8d JM |
7251 | if (tmpl == error_mark_node) |
7252 | return error_mark_node; | |
7253 | ||
386b8a85 JM |
7254 | my_friendly_assert (TREE_CODE (tmpl) == TEMPLATE_DECL, 283); |
7255 | ||
36a117a5 MM |
7256 | /* Check to see if we already have this specialization. */ |
7257 | spec = retrieve_specialization (tmpl, targ_ptr); | |
7258 | if (spec != NULL_TREE) | |
7259 | return spec; | |
7260 | ||
7261 | if (DECL_TEMPLATE_INFO (tmpl)) | |
386b8a85 | 7262 | { |
36a117a5 MM |
7263 | /* The TMPL is a partial instantiation. To get a full set of |
7264 | arguments we must add the arguments used to perform the | |
7265 | partial instantiation. */ | |
7266 | targ_ptr = add_outermost_template_args (DECL_TI_ARGS (tmpl), | |
7267 | targ_ptr); | |
7268 | gen_tmpl = most_general_template (tmpl); | |
7269 | ||
7270 | /* Check to see if we already have this specialization. */ | |
7271 | spec = retrieve_specialization (gen_tmpl, targ_ptr); | |
75650646 MM |
7272 | if (spec != NULL_TREE) |
7273 | return spec; | |
386b8a85 | 7274 | } |
36a117a5 MM |
7275 | else |
7276 | gen_tmpl = tmpl; | |
386b8a85 | 7277 | |
5566b478 MS |
7278 | push_obstacks (&permanent_obstack, &permanent_obstack); |
7279 | old_fmp_obstack = function_maybepermanent_obstack; | |
7280 | function_maybepermanent_obstack = &permanent_obstack; | |
8d08fdba | 7281 | |
36a117a5 MM |
7282 | len = DECL_NTPARMS (gen_tmpl); |
7283 | inner_args = innermost_args (targ_ptr); | |
5566b478 MS |
7284 | i = len; |
7285 | while (i--) | |
8d08fdba | 7286 | { |
36a117a5 | 7287 | tree t = TREE_VEC_ELT (inner_args, i); |
5566b478 MS |
7288 | if (TREE_CODE_CLASS (TREE_CODE (t)) == 't') |
7289 | { | |
7290 | tree nt = target_type (t); | |
ec255269 | 7291 | if (IS_AGGR_TYPE (nt) && decl_function_context (TYPE_MAIN_DECL (nt))) |
5566b478 | 7292 | { |
8251199e JM |
7293 | cp_error ("type `%T' composed from a local class is not a valid template-argument", t); |
7294 | cp_error (" trying to instantiate `%D'", gen_tmpl); | |
5566b478 MS |
7295 | fndecl = error_mark_node; |
7296 | goto out; | |
7297 | } | |
7298 | } | |
8d08fdba | 7299 | } |
e66d884e | 7300 | targ_ptr = copy_to_permanent (targ_ptr); |
8d08fdba | 7301 | |
5566b478 | 7302 | /* substitute template parameters */ |
4393e105 | 7303 | fndecl = tsubst (DECL_RESULT (gen_tmpl), targ_ptr, /*complain=*/1, gen_tmpl); |
36a117a5 MM |
7304 | /* The DECL_TI_TEMPLATE should always be the immediate parent |
7305 | template, not the most general template. */ | |
7306 | DECL_TI_TEMPLATE (fndecl) = tmpl; | |
8d08fdba | 7307 | |
824b9a4c MS |
7308 | if (flag_external_templates) |
7309 | add_pending_template (fndecl); | |
7310 | ||
5566b478 MS |
7311 | out: |
7312 | function_maybepermanent_obstack = old_fmp_obstack; | |
7313 | pop_obstacks (); | |
8d08fdba | 7314 | |
5566b478 | 7315 | return fndecl; |
8d08fdba | 7316 | } |
5566b478 MS |
7317 | |
7318 | /* Push the name of the class template into the scope of the instantiation. */ | |
8d08fdba MS |
7319 | |
7320 | void | |
5566b478 MS |
7321 | overload_template_name (type) |
7322 | tree type; | |
8d08fdba | 7323 | { |
5566b478 MS |
7324 | tree id = DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)); |
7325 | tree decl; | |
8d08fdba | 7326 | |
5566b478 MS |
7327 | if (IDENTIFIER_CLASS_VALUE (id) |
7328 | && TREE_TYPE (IDENTIFIER_CLASS_VALUE (id)) == type) | |
7329 | return; | |
8d08fdba | 7330 | |
5566b478 MS |
7331 | decl = build_decl (TYPE_DECL, id, type); |
7332 | SET_DECL_ARTIFICIAL (decl); | |
7333 | pushdecl_class_level (decl); | |
8d08fdba MS |
7334 | } |
7335 | ||
4393e105 MM |
7336 | /* The FN is a TEMPLATE_DECL for a function. The ARGS are the |
7337 | arguments that are being used when calling it. TARGS is a vector | |
7338 | into which the deduced template arguments are placed. | |
8d08fdba MS |
7339 | |
7340 | Return zero for success, 2 for an incomplete match that doesn't resolve | |
7341 | all the types, and 1 for complete failure. An error message will be | |
7342 | printed only for an incomplete match. | |
7343 | ||
4393e105 MM |
7344 | If FN is a conversion operator, RETURN_TYPE is the type desired as |
7345 | the result of the conversion operator. | |
8d08fdba | 7346 | |
4393e105 | 7347 | TPARMS is a vector of template parameters. |
9f54c803 MM |
7348 | |
7349 | The EXPLICIT_TARGS are explicit template arguments provided via a | |
7350 | template-id. | |
6467930b | 7351 | |
830bfa74 MM |
7352 | The parameter STRICT is one of: |
7353 | ||
7354 | DEDUCE_CALL: | |
7355 | We are deducing arguments for a function call, as in | |
7356 | [temp.deduct.call]. | |
7357 | ||
7358 | DEDUCE_CONV: | |
7359 | We are deducing arguments for a conversion function, as in | |
7360 | [temp.deduct.conv]. | |
7361 | ||
7362 | DEDUCE_EXACT: | |
7363 | We are deducing arguments when calculating the partial | |
7364 | ordering between specializations of function or class | |
7365 | templates, as in [temp.func.order] and [temp.class.order], | |
7366 | when doing an explicit instantiation as in [temp.explicit], | |
9f54c803 | 7367 | when determining an explicit specialization as in |
830bfa74 | 7368 | [temp.expl.spec], or when taking the address of a function |
4393e105 MM |
7369 | template, as in [temp.deduct.funcaddr]. |
7370 | ||
4393e105 | 7371 | The other arguments are as for type_unification. */ |
8d08fdba MS |
7372 | |
7373 | int | |
4393e105 | 7374 | fn_type_unification (fn, explicit_targs, targs, args, return_type, |
03017874 | 7375 | strict) |
4393e105 | 7376 | tree fn, explicit_targs, targs, args, return_type; |
830bfa74 | 7377 | unification_kind_t strict; |
386b8a85 | 7378 | { |
4393e105 MM |
7379 | tree parms; |
7380 | tree fntype; | |
386b8a85 | 7381 | |
4393e105 MM |
7382 | my_friendly_assert (TREE_CODE (fn) == TEMPLATE_DECL, 0); |
7383 | ||
7384 | fntype = TREE_TYPE (fn); | |
7385 | if (explicit_targs) | |
75650646 | 7386 | { |
4393e105 MM |
7387 | /* [temp.deduct] |
7388 | ||
7389 | The specified template arguments must match the template | |
7390 | parameters in kind (i.e., type, nontype, template), and there | |
7391 | must not be more arguments than there are parameters; | |
7392 | otherwise type deduction fails. | |
7393 | ||
7394 | Nontype arguments must match the types of the corresponding | |
7395 | nontype template parameters, or must be convertible to the | |
7396 | types of the corresponding nontype parameters as specified in | |
7397 | _temp.arg.nontype_, otherwise type deduction fails. | |
7398 | ||
7399 | All references in the function type of the function template | |
7400 | to the corresponding template parameters are replaced by the | |
7401 | specified template argument values. If a substitution in a | |
7402 | template parameter or in the function type of the function | |
7403 | template results in an invalid type, type deduction fails. */ | |
7404 | int i; | |
7405 | tree converted_args; | |
75650646 | 7406 | |
4393e105 MM |
7407 | converted_args |
7408 | = (coerce_template_parms (DECL_INNERMOST_TEMPLATE_PARMS (fn), | |
7409 | explicit_targs, NULL_TREE, /*complain=*/0, | |
7410 | /*require_all_arguments=*/0)); | |
7411 | if (converted_args == error_mark_node) | |
75650646 | 7412 | return 1; |
386b8a85 | 7413 | |
4393e105 MM |
7414 | fntype = tsubst (fntype, converted_args, /*complain=*/0, NULL_TREE); |
7415 | if (fntype == error_mark_node) | |
7416 | return 1; | |
050367a3 | 7417 | |
4393e105 MM |
7418 | /* Place the explicitly specified arguments in TARGS. */ |
7419 | for (i = 0; i < TREE_VEC_LENGTH (targs); i++) | |
7420 | TREE_VEC_ELT (targs, i) = TREE_VEC_ELT (converted_args, i); | |
75650646 | 7421 | } |
4393e105 MM |
7422 | |
7423 | parms = TYPE_ARG_TYPES (fntype); | |
386b8a85 | 7424 | |
4393e105 MM |
7425 | if (DECL_CONV_FN_P (fn)) |
7426 | { | |
7427 | /* This is a template conversion operator. Use the return types | |
edef8288 JM |
7428 | as well as the argument types. We use it instead of 'this', since |
7429 | we could be comparing conversions from different classes. */ | |
4393e105 | 7430 | parms = scratch_tree_cons (NULL_TREE, TREE_TYPE (fntype), |
edef8288 JM |
7431 | TREE_CHAIN (parms)); |
7432 | args = scratch_tree_cons (NULL_TREE, return_type, TREE_CHAIN (args)); | |
4393e105 MM |
7433 | } |
7434 | ||
4393e105 MM |
7435 | /* We allow incomplete unification without an error message here |
7436 | because the standard doesn't seem to explicitly prohibit it. Our | |
7437 | callers must be ready to deal with unification failures in any | |
7438 | event. */ | |
7439 | return type_unification_real (DECL_INNERMOST_TEMPLATE_PARMS (fn), | |
7440 | targs, parms, args, /*subr=*/0, | |
7441 | strict, /*allow_incomplete*/1); | |
830bfa74 MM |
7442 | } |
7443 | ||
7444 | /* Adjust types before performing type deduction, as described in | |
7445 | [temp.deduct.call] and [temp.deduct.conv]. The rules in these two | |
4c7d0dff MM |
7446 | sections are symmetric. PARM is the type of a function parameter |
7447 | or the return type of the conversion function. ARG is the type of | |
7448 | the argument passed to the call, or the type of the value | |
7449 | intialized with the result of the conversion function. */ | |
386b8a85 | 7450 | |
e9659ab0 | 7451 | static void |
830bfa74 MM |
7452 | maybe_adjust_types_for_deduction (strict, parm, arg) |
7453 | unification_kind_t strict; | |
7454 | tree* parm; | |
7455 | tree* arg; | |
7456 | { | |
7457 | switch (strict) | |
7458 | { | |
7459 | case DEDUCE_CALL: | |
7460 | break; | |
7461 | ||
7462 | case DEDUCE_CONV: | |
7463 | { | |
4c7d0dff MM |
7464 | /* Swap PARM and ARG throughout the remainder of this |
7465 | function; the handling is precisely symmetric since PARM | |
7466 | will initialize ARG rather than vice versa. */ | |
830bfa74 MM |
7467 | tree* temp = parm; |
7468 | parm = arg; | |
7469 | arg = temp; | |
7470 | break; | |
7471 | } | |
7472 | ||
7473 | case DEDUCE_EXACT: | |
7474 | /* There is nothing to do in this case. */ | |
7475 | return; | |
7476 | ||
7477 | default: | |
7478 | my_friendly_abort (0); | |
7479 | } | |
7480 | ||
7481 | if (TREE_CODE (*parm) != REFERENCE_TYPE) | |
7482 | { | |
7483 | /* [temp.deduct.call] | |
7484 | ||
7485 | If P is not a reference type: | |
7486 | ||
7487 | --If A is an array type, the pointer type produced by the | |
7488 | array-to-pointer standard conversion (_conv.array_) is | |
7489 | used in place of A for type deduction; otherwise, | |
7490 | ||
7491 | --If A is a function type, the pointer type produced by | |
7492 | the function-to-pointer standard conversion | |
7493 | (_conv.func_) is used in place of A for type deduction; | |
7494 | otherwise, | |
7495 | ||
7496 | --If A is a cv-qualified type, the top level | |
7497 | cv-qualifiers of A's type are ignored for type | |
7498 | deduction. */ | |
7499 | if (TREE_CODE (*arg) == ARRAY_TYPE) | |
7500 | *arg = build_pointer_type (TREE_TYPE (*arg)); | |
d8f8dca1 | 7501 | else if (TREE_CODE (*arg) == FUNCTION_TYPE) |
830bfa74 MM |
7502 | *arg = build_pointer_type (*arg); |
7503 | else | |
7504 | *arg = TYPE_MAIN_VARIANT (*arg); | |
7505 | } | |
7506 | ||
7507 | /* [temp.deduct.call] | |
7508 | ||
7509 | If P is a cv-qualified type, the top level cv-qualifiers | |
7510 | of P's type are ignored for type deduction. If P is a | |
7511 | reference type, the type referred to by P is used for | |
7512 | type deduction. */ | |
7513 | *parm = TYPE_MAIN_VARIANT (*parm); | |
7514 | if (TREE_CODE (*parm) == REFERENCE_TYPE) | |
7515 | *parm = TREE_TYPE (*parm); | |
386b8a85 JM |
7516 | } |
7517 | ||
4393e105 | 7518 | /* Like type_unfication. |
9f54c803 MM |
7519 | |
7520 | If SUBR is 1, we're being called recursively (to unify the | |
7521 | arguments of a function or method parameter of a function | |
7522 | template). */ | |
386b8a85 | 7523 | |
4966381a | 7524 | static int |
3b3ba9f0 | 7525 | type_unification_real (tparms, targs, parms, args, subr, |
4393e105 | 7526 | strict, allow_incomplete) |
050367a3 | 7527 | tree tparms, targs, parms, args; |
830bfa74 MM |
7528 | int subr; |
7529 | unification_kind_t strict; | |
7530 | int allow_incomplete; | |
8d08fdba MS |
7531 | { |
7532 | tree parm, arg; | |
7533 | int i; | |
7534 | int ntparms = TREE_VEC_LENGTH (tparms); | |
830bfa74 | 7535 | int sub_strict; |
8d08fdba MS |
7536 | |
7537 | my_friendly_assert (TREE_CODE (tparms) == TREE_VEC, 289); | |
386b8a85 JM |
7538 | my_friendly_assert (parms == NULL_TREE |
7539 | || TREE_CODE (parms) == TREE_LIST, 290); | |
51c184be | 7540 | /* ARGS could be NULL (via a call from parse.y to |
8d08fdba MS |
7541 | build_x_function_call). */ |
7542 | if (args) | |
7543 | my_friendly_assert (TREE_CODE (args) == TREE_LIST, 291); | |
7544 | my_friendly_assert (ntparms > 0, 292); | |
7545 | ||
830bfa74 MM |
7546 | switch (strict) |
7547 | { | |
7548 | case DEDUCE_CALL: | |
7549 | sub_strict = UNIFY_ALLOW_MORE_CV_QUAL | UNIFY_ALLOW_DERIVED; | |
7550 | break; | |
7551 | ||
7552 | case DEDUCE_CONV: | |
7553 | sub_strict = UNIFY_ALLOW_LESS_CV_QUAL; | |
7554 | break; | |
7555 | ||
7556 | case DEDUCE_EXACT: | |
7557 | sub_strict = UNIFY_ALLOW_NONE; | |
7558 | break; | |
7559 | ||
7560 | default: | |
7561 | my_friendly_abort (0); | |
7562 | } | |
7563 | ||
8d08fdba MS |
7564 | while (parms |
7565 | && parms != void_list_node | |
7566 | && args | |
7567 | && args != void_list_node) | |
7568 | { | |
7569 | parm = TREE_VALUE (parms); | |
7570 | parms = TREE_CHAIN (parms); | |
7571 | arg = TREE_VALUE (args); | |
7572 | args = TREE_CHAIN (args); | |
7573 | ||
7574 | if (arg == error_mark_node) | |
7575 | return 1; | |
7576 | if (arg == unknown_type_node) | |
34016c81 JM |
7577 | /* We can't deduce anything from this, but we might get all the |
7578 | template args from other function args. */ | |
7579 | continue; | |
b7484fbe | 7580 | |
03e70705 JM |
7581 | /* Conversions will be performed on a function argument that |
7582 | corresponds with a function parameter that contains only | |
7583 | non-deducible template parameters and explicitly specified | |
7584 | template parameters. */ | |
7585 | if (! uses_template_parms (parm)) | |
b7484fbe | 7586 | { |
03e70705 JM |
7587 | tree type; |
7588 | ||
7589 | if (TREE_CODE_CLASS (TREE_CODE (arg)) != 't') | |
7590 | type = TREE_TYPE (arg); | |
7591 | else | |
7592 | { | |
7593 | type = arg; | |
7594 | arg = NULL_TREE; | |
7595 | } | |
7596 | ||
830bfa74 | 7597 | if (strict == DEDUCE_EXACT) |
03e70705 | 7598 | { |
3bfdc719 | 7599 | if (same_type_p (parm, type)) |
03e70705 JM |
7600 | continue; |
7601 | } | |
03e70705 | 7602 | else |
343c89cd JM |
7603 | /* It might work; we shouldn't check now, because we might |
7604 | get into infinite recursion. Overload resolution will | |
7605 | handle it. */ | |
7606 | continue; | |
03e70705 | 7607 | |
b7484fbe MS |
7608 | return 1; |
7609 | } | |
7610 | ||
8d08fdba MS |
7611 | if (TREE_CODE_CLASS (TREE_CODE (arg)) != 't') |
7612 | { | |
7613 | my_friendly_assert (TREE_TYPE (arg) != NULL_TREE, 293); | |
34016c81 | 7614 | if (type_unknown_p (arg)) |
28cbf42c | 7615 | { |
34016c81 JM |
7616 | /* [temp.deduct.type] A template-argument can be deduced from |
7617 | a pointer to function or pointer to member function | |
7618 | argument if the set of overloaded functions does not | |
7619 | contain function templates and at most one of a set of | |
7620 | overloaded functions provides a unique match. */ | |
7621 | ||
7622 | if (resolve_overloaded_unification | |
4393e105 | 7623 | (tparms, targs, parm, arg, strict, sub_strict) |
34016c81 JM |
7624 | != 0) |
7625 | return 1; | |
7626 | continue; | |
28cbf42c | 7627 | } |
8d08fdba MS |
7628 | arg = TREE_TYPE (arg); |
7629 | } | |
4393e105 | 7630 | |
830bfa74 MM |
7631 | if (!subr) |
7632 | maybe_adjust_types_for_deduction (strict, &parm, &arg); | |
db5ae43f | 7633 | |
4393e105 | 7634 | switch (unify (tparms, targs, parm, arg, sub_strict)) |
8d08fdba MS |
7635 | { |
7636 | case 0: | |
7637 | break; | |
7638 | case 1: | |
7639 | return 1; | |
7640 | } | |
7641 | } | |
7642 | /* Fail if we've reached the end of the parm list, and more args | |
7643 | are present, and the parm list isn't variadic. */ | |
7644 | if (args && args != void_list_node && parms == void_list_node) | |
7645 | return 1; | |
7646 | /* Fail if parms are left and they don't have default values. */ | |
7647 | if (parms | |
7648 | && parms != void_list_node | |
7649 | && TREE_PURPOSE (parms) == NULL_TREE) | |
7650 | return 1; | |
7651 | if (!subr) | |
7652 | for (i = 0; i < ntparms; i++) | |
050367a3 | 7653 | if (TREE_VEC_ELT (targs, i) == NULL_TREE) |
8d08fdba | 7654 | { |
386b8a85 | 7655 | if (!allow_incomplete) |
8251199e | 7656 | error ("incomplete type unification"); |
8d08fdba MS |
7657 | return 2; |
7658 | } | |
7659 | return 0; | |
7660 | } | |
7661 | ||
34016c81 JM |
7662 | /* Subroutine of type_unification_real. Args are like the variables at the |
7663 | call site. ARG is an overloaded function (or template-id); we try | |
7664 | deducing template args from each of the overloads, and if only one | |
7665 | succeeds, we go with that. Modifies TARGS and returns 0 on success. */ | |
7666 | ||
7667 | static int | |
7668 | resolve_overloaded_unification (tparms, targs, parm, arg, strict, | |
4393e105 | 7669 | sub_strict) |
34016c81 JM |
7670 | tree tparms, targs, parm, arg; |
7671 | unification_kind_t strict; | |
7672 | int sub_strict; | |
34016c81 JM |
7673 | { |
7674 | tree tempargs = copy_node (targs); | |
7675 | int good = 0; | |
7676 | ||
7677 | if (TREE_CODE (arg) == ADDR_EXPR) | |
7678 | arg = TREE_OPERAND (arg, 0); | |
9f3d9e46 | 7679 | |
d8f8dca1 MM |
7680 | if (TREE_CODE (arg) == COMPONENT_REF) |
7681 | /* Handle `&x' where `x' is some static or non-static member | |
7682 | function name. */ | |
7683 | arg = TREE_OPERAND (arg, 1); | |
7684 | ||
05e0b2f4 JM |
7685 | if (TREE_CODE (arg) == OFFSET_REF) |
7686 | arg = TREE_OPERAND (arg, 1); | |
7687 | ||
9f3d9e46 JM |
7688 | /* Strip baselink information. */ |
7689 | while (TREE_CODE (arg) == TREE_LIST) | |
7690 | arg = TREE_VALUE (arg); | |
7691 | ||
34016c81 JM |
7692 | if (TREE_CODE (arg) == TEMPLATE_ID_EXPR) |
7693 | { | |
7694 | /* If we got some explicit template args, we need to plug them into | |
7695 | the affected templates before we try to unify, in case the | |
7696 | explicit args will completely resolve the templates in question. */ | |
7697 | ||
7698 | tree expl_subargs = TREE_OPERAND (arg, 1); | |
7699 | arg = TREE_OPERAND (arg, 0); | |
7700 | ||
7701 | for (; arg; arg = OVL_NEXT (arg)) | |
7702 | { | |
7703 | tree fn = OVL_CURRENT (arg); | |
7704 | tree subargs, elem; | |
7705 | ||
7706 | if (TREE_CODE (fn) != TEMPLATE_DECL) | |
7707 | continue; | |
7708 | ||
7709 | subargs = get_bindings_overload (fn, DECL_RESULT (fn), expl_subargs); | |
7710 | if (subargs) | |
7711 | { | |
4393e105 MM |
7712 | elem = tsubst (TREE_TYPE (fn), subargs, /*complain=*/0, |
7713 | NULL_TREE); | |
d8f8dca1 MM |
7714 | if (TREE_CODE (elem) == METHOD_TYPE) |
7715 | elem = build_ptrmemfunc_type (build_pointer_type (elem)); | |
e97e5263 | 7716 | good += try_one_overload (tparms, targs, tempargs, parm, elem, |
4393e105 | 7717 | strict, sub_strict); |
34016c81 JM |
7718 | } |
7719 | } | |
7720 | } | |
7721 | else if (TREE_CODE (arg) == OVERLOAD) | |
7722 | { | |
7723 | for (; arg; arg = OVL_NEXT (arg)) | |
d8f8dca1 MM |
7724 | { |
7725 | tree type = TREE_TYPE (OVL_CURRENT (arg)); | |
7726 | if (TREE_CODE (type) == METHOD_TYPE) | |
7727 | type = build_ptrmemfunc_type (build_pointer_type (type)); | |
7728 | good += try_one_overload (tparms, targs, tempargs, parm, | |
7729 | type, | |
4393e105 | 7730 | strict, sub_strict); |
d8f8dca1 | 7731 | } |
34016c81 JM |
7732 | } |
7733 | else | |
7734 | my_friendly_abort (981006); | |
7735 | ||
7736 | /* [temp.deduct.type] A template-argument can be deduced from a pointer | |
7737 | to function or pointer to member function argument if the set of | |
7738 | overloaded functions does not contain function templates and at most | |
7739 | one of a set of overloaded functions provides a unique match. | |
7740 | ||
7741 | So if we found multiple possibilities, we return success but don't | |
7742 | deduce anything. */ | |
7743 | ||
7744 | if (good == 1) | |
7745 | { | |
7746 | int i = TREE_VEC_LENGTH (targs); | |
7747 | for (; i--; ) | |
7748 | if (TREE_VEC_ELT (tempargs, i)) | |
7749 | TREE_VEC_ELT (targs, i) = TREE_VEC_ELT (tempargs, i); | |
7750 | } | |
7751 | if (good) | |
7752 | return 0; | |
7753 | ||
7754 | return 1; | |
7755 | } | |
7756 | ||
7757 | /* Subroutine of resolve_overloaded_unification; does deduction for a single | |
7758 | overload. Fills TARGS with any deduced arguments, or error_mark_node if | |
7759 | different overloads deduce different arguments for a given parm. | |
7760 | Returns 1 on success. */ | |
7761 | ||
7762 | static int | |
e97e5263 | 7763 | try_one_overload (tparms, orig_targs, targs, parm, arg, strict, |
4393e105 | 7764 | sub_strict) |
e97e5263 | 7765 | tree tparms, orig_targs, targs, parm, arg; |
34016c81 JM |
7766 | unification_kind_t strict; |
7767 | int sub_strict; | |
34016c81 JM |
7768 | { |
7769 | int nargs; | |
7770 | tree tempargs; | |
7771 | int i; | |
7772 | ||
7773 | /* [temp.deduct.type] A template-argument can be deduced from a pointer | |
7774 | to function or pointer to member function argument if the set of | |
7775 | overloaded functions does not contain function templates and at most | |
7776 | one of a set of overloaded functions provides a unique match. | |
7777 | ||
7778 | So if this is a template, just return success. */ | |
7779 | ||
7780 | if (uses_template_parms (arg)) | |
7781 | return 1; | |
7782 | ||
7783 | maybe_adjust_types_for_deduction (strict, &parm, &arg); | |
7784 | ||
7785 | /* We don't copy orig_targs for this because if we have already deduced | |
7786 | some template args from previous args, unify would complain when we | |
7787 | try to deduce a template parameter for the same argument, even though | |
7788 | there isn't really a conflict. */ | |
7789 | nargs = TREE_VEC_LENGTH (targs); | |
7790 | tempargs = make_scratch_vec (nargs); | |
7791 | ||
4393e105 | 7792 | if (unify (tparms, tempargs, parm, arg, sub_strict) != 0) |
34016c81 JM |
7793 | return 0; |
7794 | ||
7795 | /* First make sure we didn't deduce anything that conflicts with | |
e97e5263 | 7796 | explicitly specified args. */ |
34016c81 JM |
7797 | for (i = nargs; i--; ) |
7798 | { | |
7799 | tree elt = TREE_VEC_ELT (tempargs, i); | |
e97e5263 | 7800 | tree oldelt = TREE_VEC_ELT (orig_targs, i); |
34016c81 JM |
7801 | |
7802 | if (elt == NULL_TREE) | |
7803 | continue; | |
7804 | else if (uses_template_parms (elt)) | |
7805 | { | |
7806 | /* Since we're unifying against ourselves, we will fill in template | |
7807 | args used in the function parm list with our own template parms. | |
7808 | Discard them. */ | |
7809 | TREE_VEC_ELT (tempargs, i) = NULL_TREE; | |
7810 | continue; | |
7811 | } | |
7812 | else if (oldelt && ! template_args_equal (oldelt, elt)) | |
7813 | return 0; | |
7814 | } | |
7815 | ||
7816 | for (i = nargs; i--; ) | |
7817 | { | |
7818 | tree elt = TREE_VEC_ELT (tempargs, i); | |
7819 | ||
7820 | if (elt) | |
7821 | TREE_VEC_ELT (targs, i) = elt; | |
7822 | } | |
7823 | ||
7824 | return 1; | |
7825 | } | |
7826 | ||
4393e105 MM |
7827 | /* PARM is a template class (perhaps with unbound template |
7828 | parameters). ARG is a fully instantiated type. If ARG can be | |
7829 | bound to PARM, return ARG, otherwise return NULL_TREE. TPARMS and | |
7830 | TARGS are as for unify. */ | |
fcfb9f96 MM |
7831 | |
7832 | static tree | |
4393e105 | 7833 | try_class_unification (tparms, targs, parm, arg) |
fcfb9f96 MM |
7834 | tree tparms; |
7835 | tree targs; | |
4393e105 MM |
7836 | tree parm; |
7837 | tree arg; | |
7838 | { | |
7839 | int i; | |
7840 | tree copy_of_targs; | |
7841 | ||
7842 | if (!CLASSTYPE_TEMPLATE_INFO (arg) | |
7843 | || CLASSTYPE_TI_TEMPLATE (arg) != CLASSTYPE_TI_TEMPLATE (parm)) | |
7844 | return NULL_TREE; | |
7845 | ||
7846 | /* We need to make a new template argument vector for the call to | |
7847 | unify. If we used TARGS, we'd clutter it up with the result of | |
7848 | the attempted unification, even if this class didn't work out. | |
7849 | We also don't want to commit ourselves to all the unifications | |
7850 | we've already done, since unification is supposed to be done on | |
7851 | an argument-by-argument basis. In other words, consider the | |
7852 | following pathological case: | |
7853 | ||
7854 | template <int I, int J, int K> | |
7855 | struct S {}; | |
7856 | ||
7857 | template <int I, int J> | |
7858 | struct S<I, J, 2> : public S<I, I, I>, S<J, J, J> {}; | |
7859 | ||
7860 | template <int I, int J, int K> | |
7861 | void f(S<I, J, K>, S<I, I, I>); | |
7862 | ||
7863 | void g() { | |
7864 | S<0, 0, 0> s0; | |
7865 | S<0, 1, 2> s2; | |
7866 | ||
7867 | f(s0, s2); | |
7868 | } | |
7869 | ||
7870 | Now, by the time we consider the unification involving `s2', we | |
7871 | already know that we must have `f<0, 0, 0>'. But, even though | |
7872 | `S<0, 1, 2>' is derived from `S<0, 0, 0>', the code is not legal | |
7873 | because there are two ways to unify base classes of S<0, 1, 2> | |
7874 | with S<I, I, I>. If we kept the already deduced knowledge, we | |
7875 | would reject the possibility I=1. */ | |
7876 | push_momentary (); | |
7877 | copy_of_targs = make_temp_vec (TREE_VEC_LENGTH (targs)); | |
7878 | i = unify (tparms, copy_of_targs, CLASSTYPE_TI_ARGS (parm), | |
7879 | CLASSTYPE_TI_ARGS (arg), UNIFY_ALLOW_NONE); | |
7880 | pop_momentary (); | |
7881 | ||
7882 | /* If unification failed, we're done. */ | |
7883 | if (i != 0) | |
7884 | return NULL_TREE; | |
7885 | else | |
7886 | return arg; | |
7887 | } | |
7888 | ||
7889 | /* Subroutine of get_template_base. RVAL, if non-NULL, is a base we | |
7890 | have alreay discovered to be satisfactory. ARG_BINFO is the binfo | |
7891 | for the base class of ARG that we are currently examining. */ | |
7892 | ||
7893 | static tree | |
7894 | get_template_base_recursive (tparms, targs, parm, | |
7895 | arg_binfo, rval, flags) | |
7896 | tree tparms; | |
7897 | tree targs; | |
7898 | tree arg_binfo; | |
fcfb9f96 | 7899 | tree rval; |
4393e105 MM |
7900 | tree parm; |
7901 | int flags; | |
fcfb9f96 MM |
7902 | { |
7903 | tree binfos; | |
7904 | int i, n_baselinks; | |
4393e105 | 7905 | tree arg = BINFO_TYPE (arg_binfo); |
fcfb9f96 | 7906 | |
4393e105 | 7907 | if (!(flags & GTB_IGNORE_TYPE)) |
fcfb9f96 | 7908 | { |
4393e105 MM |
7909 | tree r = try_class_unification (tparms, targs, |
7910 | parm, arg); | |
fcfb9f96 | 7911 | |
4393e105 | 7912 | /* If there is more than one satisfactory baseclass, then: |
fcfb9f96 | 7913 | |
4393e105 MM |
7914 | [temp.deduct.call] |
7915 | ||
7916 | If they yield more than one possible deduced A, the type | |
7917 | deduction fails. | |
7918 | ||
7919 | applies. */ | |
7920 | if (r && rval && !same_type_p (r, rval)) | |
7921 | return error_mark_node; | |
7922 | else if (r) | |
7923 | rval = r; | |
fcfb9f96 MM |
7924 | } |
7925 | ||
4393e105 | 7926 | binfos = BINFO_BASETYPES (arg_binfo); |
fcfb9f96 MM |
7927 | n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0; |
7928 | ||
7929 | /* Process base types. */ | |
7930 | for (i = 0; i < n_baselinks; i++) | |
7931 | { | |
7932 | tree base_binfo = TREE_VEC_ELT (binfos, i); | |
4393e105 | 7933 | int this_virtual; |
fcfb9f96 | 7934 | |
4393e105 MM |
7935 | /* Skip this base, if we've already seen it. */ |
7936 | if (BINFO_MARKED (base_binfo)) | |
7937 | continue; | |
7938 | ||
7939 | this_virtual = | |
7940 | (flags & GTB_VIA_VIRTUAL) || TREE_VIA_VIRTUAL (base_binfo); | |
7941 | ||
7942 | /* When searching for a non-virtual, we cannot mark virtually | |
7943 | found binfos. */ | |
7944 | if (! this_virtual) | |
7945 | SET_BINFO_MARKED (base_binfo); | |
7946 | ||
7947 | rval = get_template_base_recursive (tparms, targs, | |
7948 | parm, | |
7949 | base_binfo, | |
7950 | rval, | |
7951 | GTB_VIA_VIRTUAL * this_virtual); | |
7952 | ||
7953 | /* If we discovered more than one matching base class, we can | |
7954 | stop now. */ | |
7955 | if (rval == error_mark_node) | |
7956 | return error_mark_node; | |
fcfb9f96 MM |
7957 | } |
7958 | ||
7959 | return rval; | |
7960 | } | |
7961 | ||
4393e105 MM |
7962 | /* Given a template type PARM and a class type ARG, find the unique |
7963 | base type in ARG that is an instance of PARM. We do not examine | |
7964 | ARG itself; only its base-classes. If there is no appropriate base | |
7965 | class, return NULL_TREE. If there is more than one, return | |
7966 | error_mark_node. PARM may be the type of a partial specialization, | |
7967 | as well as a plain template type. Used by unify. */ | |
fcfb9f96 MM |
7968 | |
7969 | static tree | |
4393e105 | 7970 | get_template_base (tparms, targs, parm, arg) |
fcfb9f96 MM |
7971 | tree tparms; |
7972 | tree targs; | |
4393e105 MM |
7973 | tree parm; |
7974 | tree arg; | |
fcfb9f96 | 7975 | { |
4393e105 MM |
7976 | tree rval; |
7977 | tree arg_binfo; | |
fcfb9f96 | 7978 | |
4393e105 MM |
7979 | my_friendly_assert (IS_AGGR_TYPE_CODE (TREE_CODE (arg)), 92); |
7980 | ||
7981 | arg_binfo = TYPE_BINFO (complete_type (arg)); | |
7982 | rval = get_template_base_recursive (tparms, targs, | |
7983 | parm, arg_binfo, | |
7984 | NULL_TREE, | |
7985 | GTB_IGNORE_TYPE); | |
fcfb9f96 | 7986 | |
4393e105 MM |
7987 | /* Since get_template_base_recursive marks the bases classes, we |
7988 | must unmark them here. */ | |
d6479fe7 | 7989 | dfs_walk (arg_binfo, dfs_unmark, markedp, 0); |
fcfb9f96 MM |
7990 | |
7991 | return rval; | |
7992 | } | |
7993 | ||
db2767b6 MM |
7994 | /* Returns the level of DECL, which declares a template parameter. */ |
7995 | ||
e9659ab0 | 7996 | static int |
db2767b6 MM |
7997 | template_decl_level (decl) |
7998 | tree decl; | |
7999 | { | |
8000 | switch (TREE_CODE (decl)) | |
8001 | { | |
8002 | case TYPE_DECL: | |
8003 | case TEMPLATE_DECL: | |
8004 | return TEMPLATE_TYPE_LEVEL (TREE_TYPE (decl)); | |
8005 | ||
8006 | case PARM_DECL: | |
8007 | return TEMPLATE_PARM_LEVEL (DECL_INITIAL (decl)); | |
8008 | ||
8009 | default: | |
8010 | my_friendly_abort (0); | |
5ffe581d | 8011 | return 0; |
db2767b6 MM |
8012 | } |
8013 | } | |
8014 | ||
830bfa74 MM |
8015 | /* Decide whether ARG can be unified with PARM, considering only the |
8016 | cv-qualifiers of each type, given STRICT as documented for unify. | |
8017 | Returns non-zero iff the unification is OK on that basis.*/ | |
e92cc029 | 8018 | |
e9659ab0 | 8019 | static int |
830bfa74 MM |
8020 | check_cv_quals_for_unify (strict, arg, parm) |
8021 | int strict; | |
8022 | tree arg; | |
8023 | tree parm; | |
8024 | { | |
8025 | return !((!(strict & UNIFY_ALLOW_MORE_CV_QUAL) | |
91063b51 | 8026 | && !at_least_as_qualified_p (arg, parm)) |
830bfa74 | 8027 | || (!(strict & UNIFY_ALLOW_LESS_CV_QUAL) |
91063b51 | 8028 | && (!at_least_as_qualified_p (parm, arg)))); |
830bfa74 MM |
8029 | } |
8030 | ||
8031 | /* Takes parameters as for type_unification. Returns 0 if the | |
8032 | type deduction suceeds, 1 otherwise. The parameter STRICT is a | |
8033 | bitwise or of the following flags: | |
8034 | ||
8035 | UNIFY_ALLOW_NONE: | |
8036 | Require an exact match between PARM and ARG. | |
8037 | UNIFY_ALLOW_MORE_CV_QUAL: | |
8038 | Allow the deduced ARG to be more cv-qualified than ARG. | |
8039 | UNIFY_ALLOW_LESS_CV_QUAL: | |
8040 | Allow the deduced ARG to be less cv-qualified than ARG. | |
8041 | UNIFY_ALLOW_DERIVED: | |
8042 | Allow the deduced ARG to be a template base class of ARG, | |
8043 | or a pointer to a template base class of the type pointed to by | |
161c12b0 JM |
8044 | ARG. |
8045 | UNIFY_ALLOW_INTEGER: | |
8046 | Allow any integral type to be deduced. See the TEMPLATE_PARM_INDEX | |
8047 | case for more information. */ | |
830bfa74 | 8048 | |
e9659ab0 | 8049 | static int |
4393e105 | 8050 | unify (tparms, targs, parm, arg, strict) |
050367a3 | 8051 | tree tparms, targs, parm, arg; |
830bfa74 | 8052 | int strict; |
8d08fdba MS |
8053 | { |
8054 | int idx; | |
050367a3 | 8055 | tree targ; |
db2767b6 | 8056 | tree tparm; |
8d08fdba MS |
8057 | |
8058 | /* I don't think this will do the right thing with respect to types. | |
8059 | But the only case I've seen it in so far has been array bounds, where | |
8060 | signedness is the only information lost, and I think that will be | |
8061 | okay. */ | |
8062 | while (TREE_CODE (parm) == NOP_EXPR) | |
8063 | parm = TREE_OPERAND (parm, 0); | |
8064 | ||
8065 | if (arg == error_mark_node) | |
8066 | return 1; | |
8067 | if (arg == unknown_type_node) | |
34016c81 JM |
8068 | /* We can't deduce anything from this, but we might get all the |
8069 | template args from other function args. */ | |
8070 | return 0; | |
8071 | ||
db2767b6 | 8072 | /* If PARM uses template parameters, then we can't bail out here, |
6bdb985f | 8073 | even if ARG == PARM, since we won't record unifications for the |
db2767b6 MM |
8074 | template parameters. We might need them if we're trying to |
8075 | figure out which of two things is more specialized. */ | |
8076 | if (arg == parm && !uses_template_parms (parm)) | |
8d08fdba MS |
8077 | return 0; |
8078 | ||
830bfa74 MM |
8079 | /* Immediately reject some pairs that won't unify because of |
8080 | cv-qualification mismatches. */ | |
8081 | if (TREE_CODE (arg) == TREE_CODE (parm) | |
49432171 | 8082 | && TREE_CODE_CLASS (TREE_CODE (arg)) == 't' |
830bfa74 MM |
8083 | /* We check the cv-qualifiers when unifying with template type |
8084 | parameters below. We want to allow ARG `const T' to unify with | |
8085 | PARM `T' for example, when computing which of two templates | |
8086 | is more specialized, for example. */ | |
8087 | && TREE_CODE (arg) != TEMPLATE_TYPE_PARM | |
8088 | && !check_cv_quals_for_unify (strict, arg, parm)) | |
49432171 JM |
8089 | return 1; |
8090 | ||
8d08fdba MS |
8091 | switch (TREE_CODE (parm)) |
8092 | { | |
2ca340ae JM |
8093 | case TYPENAME_TYPE: |
8094 | /* In a type which contains a nested-name-specifier, template | |
8095 | argument values cannot be deduced for template parameters used | |
8096 | within the nested-name-specifier. */ | |
8097 | return 0; | |
8098 | ||
8d08fdba | 8099 | case TEMPLATE_TYPE_PARM: |
73b0fce8 | 8100 | case TEMPLATE_TEMPLATE_PARM: |
db2767b6 MM |
8101 | tparm = TREE_VALUE (TREE_VEC_ELT (tparms, 0)); |
8102 | ||
8103 | if (TEMPLATE_TYPE_LEVEL (parm) | |
8104 | != template_decl_level (tparm)) | |
8105 | /* The PARM is not one we're trying to unify. Just check | |
8106 | to see if it matches ARG. */ | |
8107 | return (TREE_CODE (arg) == TREE_CODE (parm) | |
3bfdc719 | 8108 | && same_type_p (parm, arg)) ? 0 : 1; |
73b0fce8 | 8109 | idx = TEMPLATE_TYPE_IDX (parm); |
050367a3 | 8110 | targ = TREE_VEC_ELT (targs, idx); |
db2767b6 | 8111 | tparm = TREE_VALUE (TREE_VEC_ELT (tparms, idx)); |
050367a3 | 8112 | |
73b0fce8 | 8113 | /* Check for mixed types and values. */ |
db2767b6 MM |
8114 | if ((TREE_CODE (parm) == TEMPLATE_TYPE_PARM |
8115 | && TREE_CODE (tparm) != TYPE_DECL) | |
8116 | || (TREE_CODE (parm) == TEMPLATE_TEMPLATE_PARM | |
8117 | && TREE_CODE (tparm) != TEMPLATE_DECL)) | |
73b0fce8 KL |
8118 | return 1; |
8119 | ||
db2767b6 | 8120 | if (TREE_CODE (parm) == TEMPLATE_TEMPLATE_PARM) |
73b0fce8 | 8121 | { |
7ddedda4 | 8122 | if (TEMPLATE_TEMPLATE_PARM_TEMPLATE_INFO (parm)) |
db2767b6 MM |
8123 | { |
8124 | /* We arrive here when PARM does not involve template | |
8125 | specialization. */ | |
73b0fce8 | 8126 | |
db2767b6 MM |
8127 | /* ARG must be constructed from a template class. */ |
8128 | if (TREE_CODE (arg) != RECORD_TYPE || !CLASSTYPE_TEMPLATE_INFO (arg)) | |
8129 | return 1; | |
73b0fce8 | 8130 | |
db2767b6 | 8131 | { |
7ddedda4 MM |
8132 | tree parmtmpl = TYPE_TI_TEMPLATE (parm); |
8133 | tree parmvec = TYPE_TI_ARGS (parm); | |
db2767b6 MM |
8134 | tree argvec = CLASSTYPE_TI_ARGS (arg); |
8135 | tree argtmplvec | |
8136 | = DECL_INNERMOST_TEMPLATE_PARMS (CLASSTYPE_TI_TEMPLATE (arg)); | |
8137 | int i; | |
8138 | ||
8139 | /* The parameter and argument roles have to be switched here | |
8140 | in order to handle default arguments properly. For example, | |
8141 | template<template <class> class TT> void f(TT<int>) | |
8142 | should be able to accept vector<int> which comes from | |
744fac59 | 8143 | template <class T, class Allocator = allocator> |
73b0fce8 KL |
8144 | class vector. */ |
8145 | ||
fcfcdfc8 | 8146 | if (coerce_template_parms (argtmplvec, parmvec, parmtmpl, 0, 1) |
db2767b6 MM |
8147 | == error_mark_node) |
8148 | return 1; | |
73b0fce8 | 8149 | |
6b9b6b15 JM |
8150 | /* Deduce arguments T, i from TT<T> or TT<i>. |
8151 | We check each element of PARMVEC and ARGVEC individually | |
8152 | rather than the whole TREE_VEC since they can have | |
8153 | different number of elements. */ | |
8154 | ||
db2767b6 MM |
8155 | for (i = 0; i < TREE_VEC_LENGTH (parmvec); ++i) |
8156 | { | |
8157 | tree t = TREE_VEC_ELT (parmvec, i); | |
73b0fce8 | 8158 | |
830bfa74 MM |
8159 | if (unify (tparms, targs, t, |
8160 | TREE_VEC_ELT (argvec, i), | |
4393e105 | 8161 | UNIFY_ALLOW_NONE)) |
db2767b6 MM |
8162 | return 1; |
8163 | } | |
73b0fce8 | 8164 | } |
db2767b6 MM |
8165 | arg = CLASSTYPE_TI_TEMPLATE (arg); |
8166 | } | |
8167 | } | |
8168 | else | |
8169 | { | |
830bfa74 MM |
8170 | /* If PARM is `const T' and ARG is only `int', we don't have |
8171 | a match unless we are allowing additional qualification. | |
8172 | If ARG is `const int' and PARM is just `T' that's OK; | |
8173 | that binds `const int' to `T'. */ | |
8174 | if (!check_cv_quals_for_unify (strict | UNIFY_ALLOW_LESS_CV_QUAL, | |
8175 | arg, parm)) | |
db2767b6 MM |
8176 | return 1; |
8177 | ||
830bfa74 MM |
8178 | /* Consider the case where ARG is `const volatile int' and |
8179 | PARM is `const T'. Then, T should be `volatile int'. */ | |
8180 | arg = | |
91063b51 MM |
8181 | cp_build_qualified_type (arg, |
8182 | CP_TYPE_QUALS (arg) | |
8183 | & ~CP_TYPE_QUALS (parm)); | |
73b0fce8 KL |
8184 | } |
8185 | ||
8186 | /* Simple cases: Value already set, does match or doesn't. */ | |
4393e105 | 8187 | if (targ != NULL_TREE && same_type_p (targ, arg)) |
73b0fce8 | 8188 | return 0; |
050367a3 | 8189 | else if (targ) |
73b0fce8 | 8190 | return 1; |
61cd552e MM |
8191 | |
8192 | /* Make sure that ARG is not a variable-sized array. (Note that | |
8193 | were talking about variable-sized arrays (like `int[n]'), | |
8194 | rather than arrays of unknown size (like `int[]').) We'll | |
8195 | get very confused by such a type since the bound of the array | |
8196 | will not be computable in an instantiation. Besides, such | |
8197 | types are not allowed in ISO C++, so we can do as we please | |
8198 | here. */ | |
8199 | if (TREE_CODE (arg) == ARRAY_TYPE | |
8200 | && !uses_template_parms (arg) | |
8201 | && (TREE_CODE (TYPE_MAX_VALUE (TYPE_DOMAIN (arg))) | |
8202 | != INTEGER_CST)) | |
8203 | return 1; | |
8204 | ||
050367a3 | 8205 | TREE_VEC_ELT (targs, idx) = arg; |
73b0fce8 KL |
8206 | return 0; |
8207 | ||
f84b4be9 | 8208 | case TEMPLATE_PARM_INDEX: |
db2767b6 MM |
8209 | tparm = TREE_VALUE (TREE_VEC_ELT (tparms, 0)); |
8210 | ||
8211 | if (TEMPLATE_PARM_LEVEL (parm) | |
8212 | != template_decl_level (tparm)) | |
8213 | /* The PARM is not one we're trying to unify. Just check | |
8214 | to see if it matches ARG. */ | |
8215 | return (TREE_CODE (arg) == TREE_CODE (parm) | |
67ffc812 | 8216 | && cp_tree_equal (parm, arg) > 0) ? 0 : 1; |
db2767b6 | 8217 | |
f84b4be9 | 8218 | idx = TEMPLATE_PARM_IDX (parm); |
050367a3 | 8219 | targ = TREE_VEC_ELT (targs, idx); |
db2767b6 | 8220 | |
050367a3 | 8221 | if (targ) |
8d08fdba | 8222 | { |
67ffc812 | 8223 | int i = (cp_tree_equal (targ, arg) > 0); |
312e7d50 JM |
8224 | if (i == 1) |
8225 | return 0; | |
8226 | else if (i == 0) | |
8227 | return 1; | |
8228 | else | |
8229 | my_friendly_abort (42); | |
8d08fdba | 8230 | } |
8d08fdba | 8231 | |
161c12b0 JM |
8232 | /* [temp.deduct.type] If, in the declaration of a function template |
8233 | with a non-type template-parameter, the non-type | |
8234 | template-parameter is used in an expression in the function | |
8235 | parameter-list and, if the corresponding template-argument is | |
8236 | deduced, the template-argument type shall match the type of the | |
8237 | template-parameter exactly, except that a template-argument | |
8238 | deduced from an array bound may be of any integral type. */ | |
8239 | if (same_type_p (TREE_TYPE (arg), TREE_TYPE (parm))) | |
8240 | /* OK */; | |
8241 | else if ((strict & UNIFY_ALLOW_INTEGER) | |
8242 | && (TREE_CODE (TREE_TYPE (parm)) == INTEGER_TYPE | |
8243 | || TREE_CODE (TREE_TYPE (parm)) == BOOLEAN_TYPE)) | |
8244 | /* OK */; | |
8245 | else | |
8246 | return 1; | |
8247 | ||
050367a3 | 8248 | TREE_VEC_ELT (targs, idx) = copy_to_permanent (arg); |
8d08fdba MS |
8249 | return 0; |
8250 | ||
8251 | case POINTER_TYPE: | |
830bfa74 MM |
8252 | { |
8253 | int sub_strict; | |
4ac14744 | 8254 | |
830bfa74 MM |
8255 | if (TREE_CODE (arg) == RECORD_TYPE && TYPE_PTRMEMFUNC_FLAG (arg)) |
8256 | return (unify (tparms, targs, parm, | |
4393e105 | 8257 | TYPE_PTRMEMFUNC_FN_TYPE (arg), strict)); |
830bfa74 MM |
8258 | |
8259 | if (TREE_CODE (arg) != POINTER_TYPE) | |
8260 | return 1; | |
8261 | ||
8262 | /* [temp.deduct.call] | |
8263 | ||
8264 | A can be another pointer or pointer to member type that can | |
8265 | be converted to the deduced A via a qualification | |
8266 | conversion (_conv.qual_). | |
8267 | ||
8268 | We pass down STRICT here rather than UNIFY_ALLOW_NONE. | |
8269 | This will allow for additional cv-qualification of the | |
8270 | pointed-to types if appropriate. In general, this is a bit | |
8271 | too generous; we are only supposed to allow qualification | |
8272 | conversions and this method will allow an ARG of char** and | |
8273 | a deduced ARG of const char**. However, overload | |
8274 | resolution will subsequently invalidate the candidate, so | |
8275 | this is probably OK. */ | |
8276 | sub_strict = strict; | |
8277 | ||
8278 | if (TREE_CODE (TREE_TYPE (arg)) != RECORD_TYPE | |
8279 | || TYPE_PTRMEMFUNC_FLAG (TREE_TYPE (arg))) | |
8280 | /* The derived-to-base conversion only persists through one | |
8281 | level of pointers. */ | |
8282 | sub_strict &= ~UNIFY_ALLOW_DERIVED; | |
8283 | ||
8284 | return unify (tparms, targs, TREE_TYPE (parm), TREE_TYPE | |
4393e105 | 8285 | (arg), sub_strict); |
830bfa74 | 8286 | } |
8d08fdba MS |
8287 | |
8288 | case REFERENCE_TYPE: | |
830bfa74 MM |
8289 | if (TREE_CODE (arg) != REFERENCE_TYPE) |
8290 | return 1; | |
8291 | return unify (tparms, targs, TREE_TYPE (parm), TREE_TYPE (arg), | |
4393e105 | 8292 | UNIFY_ALLOW_NONE); |
8d08fdba MS |
8293 | |
8294 | case ARRAY_TYPE: | |
8295 | if (TREE_CODE (arg) != ARRAY_TYPE) | |
8296 | return 1; | |
3042d5be MM |
8297 | if ((TYPE_DOMAIN (parm) == NULL_TREE) |
8298 | != (TYPE_DOMAIN (arg) == NULL_TREE)) | |
8299 | return 1; | |
8300 | if (TYPE_DOMAIN (parm) != NULL_TREE | |
830bfa74 | 8301 | && unify (tparms, targs, TYPE_DOMAIN (parm), |
4393e105 | 8302 | TYPE_DOMAIN (arg), UNIFY_ALLOW_NONE) != 0) |
8d08fdba | 8303 | return 1; |
830bfa74 | 8304 | return unify (tparms, targs, TREE_TYPE (parm), TREE_TYPE (arg), |
4393e105 | 8305 | UNIFY_ALLOW_NONE); |
8d08fdba MS |
8306 | |
8307 | case REAL_TYPE: | |
37c46b43 | 8308 | case COMPLEX_TYPE: |
8d08fdba | 8309 | case INTEGER_TYPE: |
42976354 | 8310 | case BOOLEAN_TYPE: |
5ad5a526 | 8311 | case VOID_TYPE: |
f376e137 MS |
8312 | if (TREE_CODE (arg) != TREE_CODE (parm)) |
8313 | return 1; | |
8314 | ||
514a1f18 JM |
8315 | if (TREE_CODE (parm) == INTEGER_TYPE |
8316 | && TREE_CODE (TYPE_MAX_VALUE (parm)) != INTEGER_CST) | |
8d08fdba MS |
8317 | { |
8318 | if (TYPE_MIN_VALUE (parm) && TYPE_MIN_VALUE (arg) | |
830bfa74 | 8319 | && unify (tparms, targs, TYPE_MIN_VALUE (parm), |
4393e105 | 8320 | TYPE_MIN_VALUE (arg), UNIFY_ALLOW_INTEGER)) |
8d08fdba MS |
8321 | return 1; |
8322 | if (TYPE_MAX_VALUE (parm) && TYPE_MAX_VALUE (arg) | |
830bfa74 | 8323 | && unify (tparms, targs, TYPE_MAX_VALUE (parm), |
4393e105 | 8324 | TYPE_MAX_VALUE (arg), UNIFY_ALLOW_INTEGER)) |
8d08fdba MS |
8325 | return 1; |
8326 | } | |
514a1f18 JM |
8327 | /* We use the TYPE_MAIN_VARIANT since we have already |
8328 | checked cv-qualification at the top of the | |
8329 | function. */ | |
3bfdc719 MM |
8330 | else if (!same_type_p (TYPE_MAIN_VARIANT (arg), |
8331 | TYPE_MAIN_VARIANT (parm))) | |
ca79f85d JM |
8332 | return 1; |
8333 | ||
8d08fdba MS |
8334 | /* As far as unification is concerned, this wins. Later checks |
8335 | will invalidate it if necessary. */ | |
8336 | return 0; | |
8337 | ||
8338 | /* Types INTEGER_CST and MINUS_EXPR can come from array bounds. */ | |
bd6dd845 | 8339 | /* Type INTEGER_CST can come from ordinary constant template args. */ |
8d08fdba | 8340 | case INTEGER_CST: |
bd6dd845 MS |
8341 | while (TREE_CODE (arg) == NOP_EXPR) |
8342 | arg = TREE_OPERAND (arg, 0); | |
8343 | ||
8d08fdba MS |
8344 | if (TREE_CODE (arg) != INTEGER_CST) |
8345 | return 1; | |
8346 | return !tree_int_cst_equal (parm, arg); | |
8347 | ||
8d08fdba MS |
8348 | case TREE_VEC: |
8349 | { | |
8350 | int i; | |
8351 | if (TREE_CODE (arg) != TREE_VEC) | |
8352 | return 1; | |
8353 | if (TREE_VEC_LENGTH (parm) != TREE_VEC_LENGTH (arg)) | |
8354 | return 1; | |
8355 | for (i = TREE_VEC_LENGTH (parm) - 1; i >= 0; i--) | |
830bfa74 | 8356 | if (unify (tparms, targs, |
8d08fdba | 8357 | TREE_VEC_ELT (parm, i), TREE_VEC_ELT (arg, i), |
4393e105 | 8358 | UNIFY_ALLOW_NONE)) |
8d08fdba MS |
8359 | return 1; |
8360 | return 0; | |
8361 | } | |
8362 | ||
8d08fdba | 8363 | case RECORD_TYPE: |
f181d4ae | 8364 | case UNION_TYPE: |
db5ae43f | 8365 | if (TYPE_PTRMEMFUNC_FLAG (parm)) |
830bfa74 | 8366 | return unify (tparms, targs, TYPE_PTRMEMFUNC_FN_TYPE (parm), |
4393e105 | 8367 | arg, strict); |
8d08fdba | 8368 | |
f181d4ae | 8369 | if (TREE_CODE (arg) != TREE_CODE (parm)) |
a4443a08 | 8370 | return 1; |
830bfa74 | 8371 | |
5db698f6 | 8372 | if (CLASSTYPE_TEMPLATE_INFO (parm)) |
5566b478 | 8373 | { |
6467930b | 8374 | tree t = NULL_TREE; |
4393e105 | 8375 | |
830bfa74 | 8376 | if (strict & UNIFY_ALLOW_DERIVED) |
4393e105 MM |
8377 | { |
8378 | /* First, we try to unify the PARM and ARG directly. */ | |
8379 | t = try_class_unification (tparms, targs, | |
8380 | parm, arg); | |
8381 | ||
8382 | if (!t) | |
8383 | { | |
8384 | /* Fallback to the special case allowed in | |
8385 | [temp.deduct.call]: | |
8386 | ||
8387 | If P is a class, and P has the form | |
8388 | template-id, then A can be a derived class of | |
8389 | the deduced A. Likewise, if P is a pointer to | |
8390 | a class of the form template-id, A can be a | |
8391 | pointer to a derived class pointed to by the | |
8392 | deduced A. */ | |
8393 | t = get_template_base (tparms, targs, | |
8394 | parm, arg); | |
8395 | ||
8396 | if (! t || t == error_mark_node) | |
8397 | return 1; | |
8398 | } | |
8399 | } | |
6df47b06 | 8400 | else if (CLASSTYPE_TEMPLATE_INFO (arg) |
9fbf56f7 MM |
8401 | && (CLASSTYPE_TI_TEMPLATE (parm) |
8402 | == CLASSTYPE_TI_TEMPLATE (arg))) | |
6df47b06 MM |
8403 | /* Perhaps PARM is something like S<U> and ARG is S<int>. |
8404 | Then, we should unify `int' and `U'. */ | |
6467930b | 8405 | t = arg; |
4393e105 MM |
8406 | else |
8407 | /* There's no chance of unication succeeding. */ | |
5566b478 | 8408 | return 1; |
6467930b | 8409 | |
830bfa74 | 8410 | return unify (tparms, targs, CLASSTYPE_TI_ARGS (parm), |
4393e105 | 8411 | CLASSTYPE_TI_ARGS (t), UNIFY_ALLOW_NONE); |
5566b478 | 8412 | } |
3bfdc719 MM |
8413 | else if (!same_type_p (TYPE_MAIN_VARIANT (parm), |
8414 | TYPE_MAIN_VARIANT (arg))) | |
5566b478 | 8415 | return 1; |
a4443a08 | 8416 | return 0; |
8d08fdba MS |
8417 | |
8418 | case METHOD_TYPE: | |
8d08fdba | 8419 | case FUNCTION_TYPE: |
830bfa74 | 8420 | if (TREE_CODE (arg) != TREE_CODE (parm)) |
8d08fdba | 8421 | return 1; |
830bfa74 MM |
8422 | |
8423 | if (unify (tparms, targs, TREE_TYPE (parm), | |
4393e105 | 8424 | TREE_TYPE (arg), UNIFY_ALLOW_NONE)) |
28cbf42c | 8425 | return 1; |
386b8a85 | 8426 | return type_unification_real (tparms, targs, TYPE_ARG_TYPES (parm), |
3b3ba9f0 | 8427 | TYPE_ARG_TYPES (arg), 1, |
4393e105 | 8428 | DEDUCE_EXACT, 0); |
a4443a08 MS |
8429 | |
8430 | case OFFSET_TYPE: | |
8431 | if (TREE_CODE (arg) != OFFSET_TYPE) | |
8432 | return 1; | |
830bfa74 | 8433 | if (unify (tparms, targs, TYPE_OFFSET_BASETYPE (parm), |
4393e105 | 8434 | TYPE_OFFSET_BASETYPE (arg), UNIFY_ALLOW_NONE)) |
a4443a08 | 8435 | return 1; |
830bfa74 | 8436 | return unify (tparms, targs, TREE_TYPE (parm), TREE_TYPE (arg), |
4393e105 | 8437 | strict); |
a4443a08 | 8438 | |
f62dbf03 | 8439 | case CONST_DECL: |
830bfa74 | 8440 | if (arg != decl_constant_value (parm)) |
f62dbf03 JM |
8441 | return 1; |
8442 | return 0; | |
8443 | ||
027905b4 KL |
8444 | case TEMPLATE_DECL: |
8445 | /* Matched cases are handled by the ARG == PARM test above. */ | |
8446 | return 1; | |
8447 | ||
53929c47 JM |
8448 | case MINUS_EXPR: |
8449 | if (TREE_CODE (TREE_OPERAND (parm, 1)) == INTEGER_CST) | |
8450 | { | |
8451 | /* We handle this case specially, since it comes up with | |
8452 | arrays. In particular, something like: | |
8453 | ||
8454 | template <int N> void f(int (&x)[N]); | |
8455 | ||
8456 | Here, we are trying to unify the range type, which | |
8457 | looks like [0 ... (N - 1)]. */ | |
8458 | tree t, t1, t2; | |
8459 | t1 = TREE_OPERAND (parm, 0); | |
8460 | t2 = TREE_OPERAND (parm, 1); | |
8461 | ||
8462 | /* Should this be a regular fold? */ | |
8463 | t = maybe_fold_nontype_arg (build (PLUS_EXPR, | |
8464 | integer_type_node, | |
8465 | arg, t2)); | |
8466 | ||
4393e105 | 8467 | return unify (tparms, targs, t1, t, strict); |
53929c47 JM |
8468 | } |
8469 | /* else fall through */ | |
8470 | ||
8d08fdba | 8471 | default: |
050367a3 | 8472 | if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (TREE_CODE (parm)))) |
4393e105 MM |
8473 | /* We're looking at an expression. This can happen with |
8474 | something like: | |
8475 | ||
8476 | template <int I> | |
8477 | void foo(S<I>, S<I + 2>); | |
050367a3 | 8478 | |
4393e105 | 8479 | This is a "nondeduced context": |
050367a3 | 8480 | |
4393e105 MM |
8481 | [deduct.type] |
8482 | ||
8483 | The nondeduced contexts are: | |
050367a3 | 8484 | |
4393e105 MM |
8485 | --A type that is a template-id in which one or more of |
8486 | the template-arguments is an expression that references | |
8487 | a template-parameter. | |
050367a3 | 8488 | |
4393e105 MM |
8489 | In these cases, we assume deduction succeeded, but don't |
8490 | actually infer any unifications. */ | |
8491 | return 0; | |
050367a3 | 8492 | else |
b4c4a9ec MM |
8493 | sorry ("use of `%s' in template type unification", |
8494 | tree_code_name [(int) TREE_CODE (parm)]); | |
050367a3 | 8495 | |
8d08fdba MS |
8496 | return 1; |
8497 | } | |
8498 | } | |
8d08fdba | 8499 | \f |
03d0f4af MM |
8500 | /* Called if RESULT is explicitly instantiated, or is a member of an |
8501 | explicitly instantiated class, or if using -frepo and the | |
8502 | instantiation of RESULT has been assigned to this file. */ | |
8503 | ||
faae18ab | 8504 | void |
5566b478 | 8505 | mark_decl_instantiated (result, extern_p) |
faae18ab MS |
8506 | tree result; |
8507 | int extern_p; | |
8508 | { | |
75650646 MM |
8509 | if (TREE_CODE (result) != FUNCTION_DECL) |
8510 | /* The TREE_PUBLIC flag for function declarations will have been | |
8511 | set correctly by tsubst. */ | |
8512 | TREE_PUBLIC (result) = 1; | |
faae18ab MS |
8513 | |
8514 | if (! extern_p) | |
8515 | { | |
8516 | DECL_INTERFACE_KNOWN (result) = 1; | |
8517 | DECL_NOT_REALLY_EXTERN (result) = 1; | |
a7d87521 | 8518 | |
1a408d07 JM |
8519 | /* Always make artificials weak. */ |
8520 | if (DECL_ARTIFICIAL (result) && flag_weak) | |
8521 | comdat_linkage (result); | |
a7d87521 JM |
8522 | /* For WIN32 we also want to put explicit instantiations in |
8523 | linkonce sections. */ | |
1a408d07 | 8524 | else if (TREE_PUBLIC (result)) |
b385c841 | 8525 | maybe_make_one_only (result); |
faae18ab | 8526 | } |
f49422da MS |
8527 | else if (TREE_CODE (result) == FUNCTION_DECL) |
8528 | mark_inline_for_output (result); | |
faae18ab MS |
8529 | } |
8530 | ||
e1467ff2 MM |
8531 | /* Given two function templates PAT1 and PAT2, and explicit template |
8532 | arguments EXPLICIT_ARGS return: | |
6467930b MS |
8533 | |
8534 | 1 if PAT1 is more specialized than PAT2 as described in [temp.func.order]. | |
8535 | -1 if PAT2 is more specialized than PAT1. | |
8536 | 0 if neither is more specialized. */ | |
8537 | ||
8538 | int | |
e1467ff2 MM |
8539 | more_specialized (pat1, pat2, explicit_args) |
8540 | tree pat1, pat2, explicit_args; | |
6467930b | 8541 | { |
98c1c668 | 8542 | tree targs; |
73aad9b9 | 8543 | int winner = 0; |
6467930b | 8544 | |
4393e105 | 8545 | targs = get_bindings_overload (pat1, DECL_RESULT (pat2), explicit_args); |
73aad9b9 | 8546 | if (targs) |
36a117a5 | 8547 | --winner; |
6467930b | 8548 | |
4393e105 | 8549 | targs = get_bindings_overload (pat2, DECL_RESULT (pat1), explicit_args); |
73aad9b9 | 8550 | if (targs) |
36a117a5 | 8551 | ++winner; |
6467930b | 8552 | |
73aad9b9 JM |
8553 | return winner; |
8554 | } | |
6467930b | 8555 | |
73aad9b9 | 8556 | /* Given two class template specialization list nodes PAT1 and PAT2, return: |
6467930b | 8557 | |
73aad9b9 JM |
8558 | 1 if PAT1 is more specialized than PAT2 as described in [temp.class.order]. |
8559 | -1 if PAT2 is more specialized than PAT1. | |
8560 | 0 if neither is more specialized. */ | |
8561 | ||
8562 | int | |
8563 | more_specialized_class (pat1, pat2) | |
8564 | tree pat1, pat2; | |
8565 | { | |
8566 | tree targs; | |
8567 | int winner = 0; | |
8568 | ||
36a117a5 MM |
8569 | targs = get_class_bindings (TREE_VALUE (pat1), TREE_PURPOSE (pat1), |
8570 | TREE_PURPOSE (pat2)); | |
73aad9b9 JM |
8571 | if (targs) |
8572 | --winner; | |
8573 | ||
36a117a5 MM |
8574 | targs = get_class_bindings (TREE_VALUE (pat2), TREE_PURPOSE (pat2), |
8575 | TREE_PURPOSE (pat1)); | |
73aad9b9 | 8576 | if (targs) |
6467930b MS |
8577 | ++winner; |
8578 | ||
8579 | return winner; | |
8580 | } | |
73aad9b9 JM |
8581 | |
8582 | /* Return the template arguments that will produce the function signature | |
e1467ff2 | 8583 | DECL from the function template FN, with the explicit template |
76b9a14d | 8584 | arguments EXPLICIT_ARGS. If CHECK_RETTYPE is 1, the return type must |
4393e105 MM |
8585 | also match. Return NULL_TREE if no satisfactory arguments could be |
8586 | found. */ | |
73aad9b9 | 8587 | |
76b9a14d JM |
8588 | static tree |
8589 | get_bindings_real (fn, decl, explicit_args, check_rettype) | |
e1467ff2 | 8590 | tree fn, decl, explicit_args; |
76b9a14d | 8591 | int check_rettype; |
73aad9b9 | 8592 | { |
98c1c668 | 8593 | int ntparms = DECL_NTPARMS (fn); |
e66d884e | 8594 | tree targs = make_scratch_vec (ntparms); |
4393e105 | 8595 | tree decl_type; |
03017874 | 8596 | tree decl_arg_types; |
98c1c668 JM |
8597 | int i; |
8598 | ||
4393e105 MM |
8599 | /* Substitute the explicit template arguments into the type of DECL. |
8600 | The call to fn_type_unification will handle substitution into the | |
8601 | FN. */ | |
8602 | decl_type = TREE_TYPE (decl); | |
8603 | if (explicit_args && uses_template_parms (decl_type)) | |
8604 | { | |
8605 | tree tmpl; | |
8606 | tree converted_args; | |
8607 | ||
8608 | if (DECL_TEMPLATE_INFO (decl)) | |
8609 | tmpl = DECL_TI_TEMPLATE (decl); | |
8610 | else | |
8611 | /* We can get here for some illegal specializations. */ | |
8612 | return NULL_TREE; | |
8613 | ||
8614 | converted_args | |
8615 | = (coerce_template_parms (DECL_INNERMOST_TEMPLATE_PARMS (tmpl), | |
8616 | explicit_args, NULL_TREE, | |
8617 | /*complain=*/0, | |
8618 | /*require_all_arguments=*/0)); | |
8619 | if (converted_args == error_mark_node) | |
8620 | return NULL_TREE; | |
8621 | ||
8622 | decl_type = tsubst (decl_type, converted_args, /*complain=*/0, | |
8623 | NULL_TREE); | |
8624 | if (decl_type == error_mark_node) | |
8625 | return NULL_TREE; | |
8626 | } | |
8627 | ||
03017874 MM |
8628 | /* If FN is a static member function, adjust the type of DECL |
8629 | appropriately. */ | |
4393e105 | 8630 | decl_arg_types = TYPE_ARG_TYPES (decl_type); |
d7684f2d MM |
8631 | if (DECL_STATIC_FUNCTION_P (fn) |
8632 | && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)) | |
03017874 | 8633 | decl_arg_types = TREE_CHAIN (decl_arg_types); |
d7684f2d | 8634 | |
e1467ff2 | 8635 | i = fn_type_unification (fn, explicit_args, targs, |
03017874 MM |
8636 | decl_arg_types, |
8637 | TREE_TYPE (decl_type), | |
8638 | DEDUCE_EXACT); | |
98c1c668 | 8639 | |
76b9a14d JM |
8640 | if (i != 0) |
8641 | return NULL_TREE; | |
8642 | ||
8643 | if (check_rettype) | |
e1467ff2 MM |
8644 | { |
8645 | /* Check to see that the resulting return type is also OK. */ | |
36a117a5 | 8646 | tree t = tsubst (TREE_TYPE (TREE_TYPE (fn)), targs, |
4393e105 | 8647 | /*complain=*/0, NULL_TREE); |
e1467ff2 | 8648 | |
3bfdc719 | 8649 | if (!same_type_p (t, TREE_TYPE (TREE_TYPE (decl)))) |
e1467ff2 | 8650 | return NULL_TREE; |
e1467ff2 MM |
8651 | } |
8652 | ||
76b9a14d JM |
8653 | return targs; |
8654 | } | |
8655 | ||
8656 | /* For most uses, we want to check the return type. */ | |
8657 | ||
8658 | tree | |
8659 | get_bindings (fn, decl, explicit_args) | |
8660 | tree fn, decl, explicit_args; | |
8661 | { | |
8662 | return get_bindings_real (fn, decl, explicit_args, 1); | |
8663 | } | |
8664 | ||
8665 | /* But for more_specialized, we only care about the parameter types. */ | |
8666 | ||
8667 | static tree | |
8668 | get_bindings_overload (fn, decl, explicit_args) | |
8669 | tree fn, decl, explicit_args; | |
8670 | { | |
8671 | return get_bindings_real (fn, decl, explicit_args, 0); | |
73aad9b9 JM |
8672 | } |
8673 | ||
36a117a5 MM |
8674 | /* Return the innermost template arguments that, when applied to a |
8675 | template specialization whose innermost template parameters are | |
8676 | TPARMS, and whose specialization arguments are ARGS, yield the | |
8677 | ARGS. | |
8678 | ||
8679 | For example, suppose we have: | |
8680 | ||
8681 | template <class T, class U> struct S {}; | |
8682 | template <class T> struct S<T*, int> {}; | |
8683 | ||
8684 | Then, suppose we want to get `S<double*, int>'. The TPARMS will be | |
8685 | {T}, the PARMS will be {T*, int} and the ARGS will be {double*, | |
8686 | int}. The resulting vector will be {double}, indicating that `T' | |
8687 | is bound to `double'. */ | |
8688 | ||
bd6dd845 | 8689 | static tree |
36a117a5 MM |
8690 | get_class_bindings (tparms, parms, args) |
8691 | tree tparms, parms, args; | |
73aad9b9 | 8692 | { |
3b3ba9f0 | 8693 | int i, ntparms = TREE_VEC_LENGTH (tparms); |
73aad9b9 JM |
8694 | tree vec = make_temp_vec (ntparms); |
8695 | ||
36a117a5 | 8696 | args = innermost_args (args); |
8d019cef | 8697 | |
4393e105 | 8698 | if (unify (tparms, vec, parms, args, UNIFY_ALLOW_NONE)) |
fcfb9f96 | 8699 | return NULL_TREE; |
73aad9b9 JM |
8700 | |
8701 | for (i = 0; i < ntparms; ++i) | |
8702 | if (! TREE_VEC_ELT (vec, i)) | |
8703 | return NULL_TREE; | |
8704 | ||
8705 | return vec; | |
8706 | } | |
8707 | ||
104bf76a MM |
8708 | /* In INSTANTIATIONS is a list of <INSTANTIATION, TEMPLATE> pairs. |
8709 | Pick the most specialized template, and return the corresponding | |
8710 | instantiation, or if there is no corresponding instantiation, the | |
8711 | template itself. EXPLICIT_ARGS is any template arguments explicity | |
8712 | mentioned in a template-id. If there is no most specialized | |
8713 | tempalte, error_mark_node is returned. If there are no templates | |
8714 | at all, NULL_TREE is returned. */ | |
73aad9b9 JM |
8715 | |
8716 | tree | |
104bf76a MM |
8717 | most_specialized_instantiation (instantiations, explicit_args) |
8718 | tree instantiations; | |
8719 | tree explicit_args; | |
73aad9b9 | 8720 | { |
104bf76a | 8721 | tree fn, champ; |
73aad9b9 JM |
8722 | int fate; |
8723 | ||
104bf76a | 8724 | if (!instantiations) |
73aad9b9 JM |
8725 | return NULL_TREE; |
8726 | ||
104bf76a MM |
8727 | champ = instantiations; |
8728 | for (fn = TREE_CHAIN (instantiations); fn; fn = TREE_CHAIN (fn)) | |
73aad9b9 | 8729 | { |
104bf76a MM |
8730 | fate = more_specialized (TREE_VALUE (champ), |
8731 | TREE_VALUE (fn), explicit_args); | |
73aad9b9 JM |
8732 | if (fate == 1) |
8733 | ; | |
8734 | else | |
8735 | { | |
8736 | if (fate == 0) | |
8737 | { | |
8738 | fn = TREE_CHAIN (fn); | |
8739 | if (! fn) | |
8740 | return error_mark_node; | |
8741 | } | |
104bf76a | 8742 | champ = fn; |
73aad9b9 JM |
8743 | } |
8744 | } | |
8745 | ||
104bf76a | 8746 | for (fn = instantiations; fn && fn != champ; fn = TREE_CHAIN (fn)) |
73aad9b9 | 8747 | { |
104bf76a MM |
8748 | fate = more_specialized (TREE_VALUE (champ), |
8749 | TREE_VALUE (fn), explicit_args); | |
73aad9b9 JM |
8750 | if (fate != 1) |
8751 | return error_mark_node; | |
8752 | } | |
8753 | ||
104bf76a MM |
8754 | return TREE_PURPOSE (champ) ? TREE_PURPOSE (champ) : TREE_VALUE (champ); |
8755 | } | |
8756 | ||
8757 | /* Return the most specialized of the list of templates in FNS that can | |
8758 | produce an instantiation matching DECL, given the explicit template | |
8759 | arguments EXPLICIT_ARGS. */ | |
8760 | ||
e9659ab0 | 8761 | static tree |
104bf76a MM |
8762 | most_specialized (fns, decl, explicit_args) |
8763 | tree fns, decl, explicit_args; | |
8764 | { | |
8765 | tree candidates = NULL_TREE; | |
8766 | tree fn, args; | |
8767 | ||
8768 | for (fn = fns; fn; fn = TREE_CHAIN (fn)) | |
8769 | { | |
8770 | tree candidate = TREE_VALUE (fn); | |
8771 | ||
8772 | args = get_bindings (candidate, decl, explicit_args); | |
8773 | if (args) | |
8774 | candidates = scratch_tree_cons (NULL_TREE, candidate, | |
8775 | candidates); | |
8776 | } | |
8777 | ||
8778 | return most_specialized_instantiation (candidates, explicit_args); | |
73aad9b9 JM |
8779 | } |
8780 | ||
36a117a5 MM |
8781 | /* If DECL is a specialization of some template, return the most |
8782 | general such template. For example, given: | |
8783 | ||
8784 | template <class T> struct S { template <class U> void f(U); }; | |
8785 | ||
8786 | if TMPL is `template <class U> void S<int>::f(U)' this will return | |
8787 | the full template. This function will not trace past partial | |
8788 | specializations, however. For example, given in addition: | |
8789 | ||
8790 | template <class T> struct S<T*> { template <class U> void f(U); }; | |
8791 | ||
8792 | if TMPL is `template <class U> void S<int*>::f(U)' this will return | |
8793 | `template <class T> template <class U> S<T*>::f(U)'. */ | |
73aad9b9 | 8794 | |
e9659ab0 | 8795 | static tree |
36a117a5 MM |
8796 | most_general_template (decl) |
8797 | tree decl; | |
73aad9b9 | 8798 | { |
36a117a5 MM |
8799 | while (DECL_TEMPLATE_INFO (decl)) |
8800 | decl = DECL_TI_TEMPLATE (decl); | |
8801 | ||
8802 | return decl; | |
8803 | } | |
8804 | ||
8805 | /* Return the most specialized of the class template specializations | |
8806 | of TMPL which can produce an instantiation matching ARGS, or | |
8807 | error_mark_node if the choice is ambiguous. */ | |
8808 | ||
e9659ab0 | 8809 | static tree |
36a117a5 MM |
8810 | most_specialized_class (tmpl, args) |
8811 | tree tmpl; | |
8812 | tree args; | |
8813 | { | |
8814 | tree list = NULL_TREE; | |
8815 | tree t; | |
8816 | tree champ; | |
73aad9b9 JM |
8817 | int fate; |
8818 | ||
36a117a5 MM |
8819 | tmpl = most_general_template (tmpl); |
8820 | for (t = DECL_TEMPLATE_SPECIALIZATIONS (tmpl); t; t = TREE_CHAIN (t)) | |
73aad9b9 | 8821 | { |
36a117a5 MM |
8822 | tree spec_args |
8823 | = get_class_bindings (TREE_VALUE (t), TREE_PURPOSE (t), args); | |
8824 | if (spec_args) | |
73aad9b9 JM |
8825 | { |
8826 | list = decl_tree_cons (TREE_PURPOSE (t), TREE_VALUE (t), list); | |
8827 | TREE_TYPE (list) = TREE_TYPE (t); | |
8828 | } | |
8829 | } | |
8830 | ||
8831 | if (! list) | |
8832 | return NULL_TREE; | |
8833 | ||
8834 | t = list; | |
8835 | champ = t; | |
8836 | t = TREE_CHAIN (t); | |
8837 | for (; t; t = TREE_CHAIN (t)) | |
8838 | { | |
8839 | fate = more_specialized_class (champ, t); | |
8840 | if (fate == 1) | |
8841 | ; | |
8842 | else | |
8843 | { | |
8844 | if (fate == 0) | |
8845 | { | |
8846 | t = TREE_CHAIN (t); | |
8847 | if (! t) | |
8848 | return error_mark_node; | |
8849 | } | |
8850 | champ = t; | |
8851 | } | |
8852 | } | |
8853 | ||
8854 | for (t = list; t && t != champ; t = TREE_CHAIN (t)) | |
8855 | { | |
85b71cf2 | 8856 | fate = more_specialized_class (champ, t); |
73aad9b9 JM |
8857 | if (fate != 1) |
8858 | return error_mark_node; | |
8859 | } | |
8860 | ||
8861 | return champ; | |
8862 | } | |
8863 | ||
8d08fdba | 8864 | /* called from the parser. */ |
e92cc029 | 8865 | |
8d08fdba | 8866 | void |
6633d636 | 8867 | do_decl_instantiation (declspecs, declarator, storage) |
f0e01782 | 8868 | tree declspecs, declarator, storage; |
8d08fdba | 8869 | { |
c11b6f21 | 8870 | tree decl = grokdeclarator (declarator, declspecs, NORMAL, 0, NULL_TREE); |
8d08fdba | 8871 | tree result = NULL_TREE; |
faae18ab | 8872 | int extern_p = 0; |
e8abc66f | 8873 | |
ec255269 MS |
8874 | if (! DECL_LANG_SPECIFIC (decl)) |
8875 | { | |
8251199e | 8876 | cp_error ("explicit instantiation of non-template `%#D'", decl); |
ec255269 MS |
8877 | return; |
8878 | } | |
03d0f4af | 8879 | else if (TREE_CODE (decl) == VAR_DECL) |
6633d636 | 8880 | { |
03d0f4af MM |
8881 | /* There is an asymmetry here in the way VAR_DECLs and |
8882 | FUNCTION_DECLs are handled by grokdeclarator. In the case of | |
8883 | the latter, the DECL we get back will be marked as a | |
8884 | template instantiation, and the appropriate | |
8885 | DECL_TEMPLATE_INFO will be set up. This does not happen for | |
8886 | VAR_DECLs so we do the lookup here. Probably, grokdeclarator | |
8887 | should handle VAR_DECLs as it currently handles | |
8888 | FUNCTION_DECLs. */ | |
6633d636 MS |
8889 | result = lookup_field (DECL_CONTEXT (decl), DECL_NAME (decl), 0, 0); |
8890 | if (result && TREE_CODE (result) != VAR_DECL) | |
03d0f4af | 8891 | { |
8251199e | 8892 | cp_error ("no matching template for `%D' found", result); |
03d0f4af MM |
8893 | return; |
8894 | } | |
6633d636 MS |
8895 | } |
8896 | else if (TREE_CODE (decl) != FUNCTION_DECL) | |
8897 | { | |
8251199e | 8898 | cp_error ("explicit instantiation of `%#D'", decl); |
6633d636 MS |
8899 | return; |
8900 | } | |
03d0f4af MM |
8901 | else |
8902 | result = decl; | |
672476cb | 8903 | |
03d0f4af MM |
8904 | /* Check for various error cases. Note that if the explicit |
8905 | instantiation is legal the RESULT will currently be marked as an | |
8906 | *implicit* instantiation; DECL_EXPLICIT_INSTANTIATION is not set | |
8907 | until we get here. */ | |
8908 | ||
8909 | if (DECL_TEMPLATE_SPECIALIZATION (result)) | |
672476cb | 8910 | { |
03d0f4af MM |
8911 | /* [temp.spec] |
8912 | ||
8913 | No program shall both explicitly instantiate and explicitly | |
8914 | specialize a template. */ | |
8251199e JM |
8915 | cp_error ("explicit instantiation of `%#D' after", result); |
8916 | cp_error_at ("explicit specialization here", result); | |
672476cb MM |
8917 | return; |
8918 | } | |
03d0f4af MM |
8919 | else if (DECL_EXPLICIT_INSTANTIATION (result)) |
8920 | { | |
8921 | /* [temp.spec] | |
98c1c668 | 8922 | |
03d0f4af MM |
8923 | No program shall explicitly instantiate any template more |
8924 | than once. | |
8925 | ||
8926 | We check DECL_INTERFACE_KNOWN so as not to complain when the | |
8927 | first instantiation was `extern' and the second is not, and | |
8928 | EXTERN_P for the opposite case. */ | |
8929 | if (DECL_INTERFACE_KNOWN (result) && !extern_p) | |
8251199e | 8930 | cp_error ("duplicate explicit instantiation of `%#D'", result); |
03d0f4af MM |
8931 | |
8932 | /* If we've already instantiated the template, just return now. */ | |
8933 | if (DECL_INTERFACE_KNOWN (result)) | |
8934 | return; | |
8935 | } | |
8936 | else if (!DECL_IMPLICIT_INSTANTIATION (result)) | |
faae18ab | 8937 | { |
8251199e | 8938 | cp_error ("no matching template for `%D' found", result); |
faae18ab MS |
8939 | return; |
8940 | } | |
03d0f4af | 8941 | else if (!DECL_TEMPLATE_INFO (result)) |
6633d636 | 8942 | { |
8251199e | 8943 | cp_pedwarn ("explicit instantiation of non-template `%#D'", result); |
6633d636 MS |
8944 | return; |
8945 | } | |
8946 | ||
a0a33927 MS |
8947 | if (flag_external_templates) |
8948 | return; | |
8949 | ||
f0e01782 | 8950 | if (storage == NULL_TREE) |
00595019 | 8951 | ; |
faae18ab | 8952 | else if (storage == ridpointers[(int) RID_EXTERN]) |
03d0f4af MM |
8953 | { |
8954 | if (pedantic) | |
8251199e | 8955 | cp_pedwarn ("ANSI C++ forbids the use of `extern' on explicit instantiations"); |
03d0f4af MM |
8956 | extern_p = 1; |
8957 | } | |
f0e01782 | 8958 | else |
8251199e | 8959 | cp_error ("storage class `%D' applied to template instantiation", |
f0e01782 | 8960 | storage); |
5566b478 | 8961 | |
03d0f4af | 8962 | SET_DECL_EXPLICIT_INSTANTIATION (result); |
5566b478 | 8963 | mark_decl_instantiated (result, extern_p); |
44a8d0b3 | 8964 | repo_template_instantiated (result, extern_p); |
c91a56d2 MS |
8965 | if (! extern_p) |
8966 | instantiate_decl (result); | |
7177d104 MS |
8967 | } |
8968 | ||
faae18ab MS |
8969 | void |
8970 | mark_class_instantiated (t, extern_p) | |
8971 | tree t; | |
8972 | int extern_p; | |
8973 | { | |
8974 | SET_CLASSTYPE_EXPLICIT_INSTANTIATION (t); | |
eb773359 JM |
8975 | SET_CLASSTYPE_INTERFACE_KNOWN (t); |
8976 | CLASSTYPE_INTERFACE_ONLY (t) = extern_p; | |
faae18ab MS |
8977 | CLASSTYPE_VTABLE_NEEDS_WRITING (t) = ! extern_p; |
8978 | TYPE_DECL_SUPPRESS_DEBUG (TYPE_NAME (t)) = extern_p; | |
8979 | if (! extern_p) | |
8980 | { | |
8981 | CLASSTYPE_DEBUG_REQUESTED (t) = 1; | |
8982 | rest_of_type_compilation (t, 1); | |
8983 | } | |
8984 | } | |
e8abc66f | 8985 | |
7177d104 | 8986 | void |
ca79f85d JM |
8987 | do_type_instantiation (t, storage) |
8988 | tree t, storage; | |
7177d104 | 8989 | { |
e8abc66f MS |
8990 | int extern_p = 0; |
8991 | int nomem_p = 0; | |
5566b478 MS |
8992 | int static_p = 0; |
8993 | ||
ca79f85d JM |
8994 | if (TREE_CODE (t) == TYPE_DECL) |
8995 | t = TREE_TYPE (t); | |
8996 | ||
7ddedda4 | 8997 | if (! CLASS_TYPE_P (t) || ! CLASSTYPE_TEMPLATE_INFO (t)) |
ca79f85d | 8998 | { |
8251199e | 8999 | cp_error ("explicit instantiation of non-template type `%T'", t); |
ca79f85d JM |
9000 | return; |
9001 | } | |
9002 | ||
5566b478 | 9003 | complete_type (t); |
7177d104 | 9004 | |
a292b002 MS |
9005 | /* With -fexternal-templates, explicit instantiations are treated the same |
9006 | as implicit ones. */ | |
a0a33927 MS |
9007 | if (flag_external_templates) |
9008 | return; | |
9009 | ||
f0e01782 MS |
9010 | if (TYPE_SIZE (t) == NULL_TREE) |
9011 | { | |
8251199e | 9012 | cp_error ("explicit instantiation of `%#T' before definition of template", |
f0e01782 MS |
9013 | t); |
9014 | return; | |
9015 | } | |
9016 | ||
03d0f4af | 9017 | if (storage != NULL_TREE) |
f0e01782 | 9018 | { |
03d0f4af | 9019 | if (pedantic) |
8251199e JM |
9020 | cp_pedwarn("ANSI C++ forbids the use of `%s' on explicit instantiations", |
9021 | IDENTIFIER_POINTER (storage)); | |
03d0f4af MM |
9022 | |
9023 | if (storage == ridpointers[(int) RID_INLINE]) | |
9024 | nomem_p = 1; | |
9025 | else if (storage == ridpointers[(int) RID_EXTERN]) | |
9026 | extern_p = 1; | |
9027 | else if (storage == ridpointers[(int) RID_STATIC]) | |
9028 | static_p = 1; | |
9029 | else | |
9030 | { | |
8251199e | 9031 | cp_error ("storage class `%D' applied to template instantiation", |
03d0f4af MM |
9032 | storage); |
9033 | extern_p = 0; | |
9034 | } | |
f0e01782 MS |
9035 | } |
9036 | ||
03d0f4af MM |
9037 | if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)) |
9038 | { | |
9039 | /* [temp.spec] | |
a292b002 | 9040 | |
03d0f4af MM |
9041 | No program shall both explicitly instantiate and explicitly |
9042 | specialize a template. */ | |
8251199e JM |
9043 | cp_error ("explicit instantiation of `%#T' after", t); |
9044 | cp_error_at ("explicit specialization here", t); | |
03d0f4af MM |
9045 | return; |
9046 | } | |
9047 | else if (CLASSTYPE_EXPLICIT_INSTANTIATION (t)) | |
44a8d0b3 | 9048 | { |
03d0f4af MM |
9049 | /* [temp.spec] |
9050 | ||
9051 | No program shall explicitly instantiate any template more | |
9052 | than once. | |
9053 | ||
9054 | If CLASSTYPE_INTERFACE_ONLY, then the first explicit | |
9055 | instantiation was `extern', and if EXTERN_P then the second | |
9056 | is. Both cases are OK. */ | |
9057 | if (!CLASSTYPE_INTERFACE_ONLY (t) && !extern_p) | |
8251199e | 9058 | cp_error ("duplicate explicit instantiation of `%#T'", t); |
03d0f4af MM |
9059 | |
9060 | /* If we've already instantiated the template, just return now. */ | |
9061 | if (!CLASSTYPE_INTERFACE_ONLY (t)) | |
9062 | return; | |
44a8d0b3 | 9063 | } |
e8abc66f | 9064 | |
03d0f4af MM |
9065 | mark_class_instantiated (t, extern_p); |
9066 | repo_template_instantiated (t, extern_p); | |
9067 | ||
e8abc66f MS |
9068 | if (nomem_p) |
9069 | return; | |
9070 | ||
7177d104 | 9071 | { |
db5ae43f | 9072 | tree tmp; |
5566b478 | 9073 | |
03d0f4af MM |
9074 | /* In contrast to implicit instantiation, where only the |
9075 | declarations, and not the definitions, of members are | |
9076 | instantiated, we have here: | |
9077 | ||
9078 | [temp.explicit] | |
9079 | ||
9080 | The explicit instantiation of a class template specialization | |
9081 | implies the instantiation of all of its members not | |
9082 | previously explicitly specialized in the translation unit | |
9083 | containing the explicit instantiation. | |
9084 | ||
9085 | Of course, we can't instantiate member template classes, since | |
9086 | we don't have any arguments for them. Note that the standard | |
9087 | is unclear on whether the instatiation of the members are | |
9088 | *explicit* instantiations or not. We choose to be generous, | |
9089 | and not set DECL_EXPLICIT_INSTANTIATION. Therefore, we allow | |
9090 | the explicit instantiation of a class where some of the members | |
9091 | have no definition in the current translation unit. */ | |
9092 | ||
5566b478 MS |
9093 | if (! static_p) |
9094 | for (tmp = TYPE_METHODS (t); tmp; tmp = TREE_CHAIN (tmp)) | |
a7d87521 | 9095 | if (TREE_CODE (tmp) == FUNCTION_DECL |
1f109f0f | 9096 | && DECL_TEMPLATE_INSTANTIATION (tmp)) |
5566b478 MS |
9097 | { |
9098 | mark_decl_instantiated (tmp, extern_p); | |
9099 | repo_template_instantiated (tmp, extern_p); | |
9100 | if (! extern_p) | |
9101 | instantiate_decl (tmp); | |
9102 | } | |
9103 | ||
9104 | for (tmp = TYPE_FIELDS (t); tmp; tmp = TREE_CHAIN (tmp)) | |
9105 | if (TREE_CODE (tmp) == VAR_DECL && DECL_TEMPLATE_INSTANTIATION (tmp)) | |
863adfc0 | 9106 | { |
5566b478 | 9107 | mark_decl_instantiated (tmp, extern_p); |
863adfc0 | 9108 | repo_template_instantiated (tmp, extern_p); |
5566b478 MS |
9109 | if (! extern_p) |
9110 | instantiate_decl (tmp); | |
863adfc0 | 9111 | } |
7177d104 | 9112 | |
a292b002 | 9113 | for (tmp = CLASSTYPE_TAGS (t); tmp; tmp = TREE_CHAIN (tmp)) |
e4a84209 MM |
9114 | if (IS_AGGR_TYPE (TREE_VALUE (tmp)) |
9115 | && !uses_template_parms (CLASSTYPE_TI_ARGS (TREE_VALUE (tmp)))) | |
f376e137 | 9116 | do_type_instantiation (TYPE_MAIN_DECL (TREE_VALUE (tmp)), storage); |
a292b002 | 9117 | } |
8d08fdba | 9118 | } |
a28e3c7f | 9119 | |
36a117a5 MM |
9120 | /* Given a function DECL, which is a specialization of TMPL, modify |
9121 | DECL to be a re-instantiation of TMPL with the same template | |
9122 | arguments. TMPL should be the template into which tsubst'ing | |
9123 | should occur for DECL, not the most general template. | |
830bfa74 MM |
9124 | |
9125 | One reason for doing this is a scenario like this: | |
9126 | ||
9127 | template <class T> | |
9128 | void f(const T&, int i); | |
9129 | ||
9130 | void g() { f(3, 7); } | |
9131 | ||
9132 | template <class T> | |
9133 | void f(const T& t, const int i) { } | |
9134 | ||
9135 | Note that when the template is first instantiated, with | |
9136 | instantiate_template, the resulting DECL will have no name for the | |
9137 | first parameter, and the wrong type for the second. So, when we go | |
9138 | to instantiate the DECL, we regenerate it. */ | |
9139 | ||
e9659ab0 | 9140 | static void |
830bfa74 MM |
9141 | regenerate_decl_from_template (decl, tmpl) |
9142 | tree decl; | |
9143 | tree tmpl; | |
9144 | { | |
9145 | tree args; | |
830bfa74 MM |
9146 | tree code_pattern; |
9147 | tree new_decl; | |
36a117a5 MM |
9148 | tree gen_tmpl; |
9149 | int unregistered; | |
830bfa74 MM |
9150 | |
9151 | args = DECL_TI_ARGS (decl); | |
9152 | code_pattern = DECL_TEMPLATE_RESULT (tmpl); | |
9153 | ||
8251199e JM |
9154 | /* Unregister the specialization so that when we tsubst we will not |
9155 | just return DECL. We don't have to unregister DECL from TMPL | |
9156 | because if would only be registered there if it were a partial | |
9157 | instantiation of a specialization, which it isn't: it's a full | |
9158 | instantiation. */ | |
36a117a5 MM |
9159 | gen_tmpl = most_general_template (tmpl); |
9160 | unregistered = unregister_specialization (decl, gen_tmpl); | |
9161 | ||
9162 | /* If the DECL was not unregistered then something peculiar is | |
9163 | happening: we created a specialization but did not call | |
9164 | register_specialization for it. */ | |
9165 | my_friendly_assert (unregistered, 0); | |
9166 | ||
61a127b3 MM |
9167 | if (TREE_CODE (decl) == VAR_DECL) |
9168 | /* Make sure that we can see identifiers, and compute access | |
9169 | correctly, for the class members used in the declaration of | |
9170 | this static variable. */ | |
9171 | pushclass (DECL_CONTEXT (decl), 2); | |
9172 | ||
d8c4447d | 9173 | /* Do the substitution to get the new declaration. */ |
4393e105 | 9174 | new_decl = tsubst (code_pattern, args, /*complain=*/1, NULL_TREE); |
830bfa74 MM |
9175 | |
9176 | if (TREE_CODE (decl) == VAR_DECL) | |
9177 | { | |
9178 | /* Set up DECL_INITIAL, since tsubst doesn't. */ | |
830bfa74 | 9179 | DECL_INITIAL (new_decl) = |
d8c4447d | 9180 | tsubst_expr (DECL_INITIAL (code_pattern), args, |
4393e105 | 9181 | /*complain=*/1, DECL_TI_TEMPLATE (decl)); |
61a127b3 | 9182 | /* Pop the class context we pushed above. */ |
b74a0560 | 9183 | popclass (); |
830bfa74 | 9184 | } |
2b0a63a3 | 9185 | else if (TREE_CODE (decl) == FUNCTION_DECL) |
fbf1c34b MM |
9186 | { |
9187 | /* Convince duplicate_decls to use the DECL_ARGUMENTS from the | |
9188 | new decl. */ | |
9189 | DECL_INITIAL (new_decl) = error_mark_node; | |
9190 | /* And don't complain about a duplicate definition. */ | |
9191 | DECL_INITIAL (decl) = NULL_TREE; | |
9192 | } | |
36a117a5 MM |
9193 | |
9194 | /* The immediate parent of the new template is still whatever it was | |
9195 | before, even though tsubst sets DECL_TI_TEMPLATE up as the most | |
9196 | general template. We also reset the DECL_ASSEMBLER_NAME since | |
9197 | tsubst always calculates the name as if the function in question | |
9198 | were really a template instance, and sometimes, with friend | |
9199 | functions, this is not so. See tsubst_friend_function for | |
9200 | details. */ | |
9201 | DECL_TI_TEMPLATE (new_decl) = DECL_TI_TEMPLATE (decl); | |
9202 | DECL_ASSEMBLER_NAME (new_decl) = DECL_ASSEMBLER_NAME (decl); | |
9203 | DECL_RTL (new_decl) = DECL_RTL (decl); | |
9204 | ||
9205 | /* Call duplicate decls to merge the old and new declarations. */ | |
830bfa74 MM |
9206 | duplicate_decls (new_decl, decl); |
9207 | ||
36a117a5 MM |
9208 | /* Now, re-register the specialization. */ |
9209 | register_specialization (decl, gen_tmpl, args); | |
830bfa74 MM |
9210 | } |
9211 | ||
f84b4be9 JM |
9212 | /* Produce the definition of D, a _DECL generated from a template. */ |
9213 | ||
a28e3c7f | 9214 | tree |
5566b478 MS |
9215 | instantiate_decl (d) |
9216 | tree d; | |
a28e3c7f | 9217 | { |
36a117a5 MM |
9218 | tree tmpl = DECL_TI_TEMPLATE (d); |
9219 | tree args = DECL_TI_ARGS (d); | |
830bfa74 | 9220 | tree td; |
36a117a5 MM |
9221 | tree code_pattern; |
9222 | tree spec; | |
9223 | tree gen_tmpl; | |
5566b478 | 9224 | int nested = in_function_p (); |
5566b478 | 9225 | int pattern_defined; |
c27be9b9 JM |
9226 | int line = lineno; |
9227 | char *file = input_filename; | |
5566b478 | 9228 | |
36a117a5 MM |
9229 | /* This function should only be used to instantiate templates for |
9230 | functions and static member variables. */ | |
9231 | my_friendly_assert (TREE_CODE (d) == FUNCTION_DECL | |
9232 | || TREE_CODE (d) == VAR_DECL, 0); | |
9233 | ||
fbf1c34b | 9234 | if (DECL_TEMPLATE_INSTANTIATED (d)) |
03d0f4af MM |
9235 | /* D has already been instantiated. It might seem reasonable to |
9236 | check whether or not D is an explict instantiation, and, if so, | |
9237 | stop here. But when an explicit instantiation is deferred | |
9238 | until the end of the compilation, DECL_EXPLICIT_INSTANTIATION | |
9239 | is set, even though we still need to do the instantiation. */ | |
36a117a5 MM |
9240 | return d; |
9241 | ||
9242 | /* If we already have a specialization of this declaration, then | |
9243 | there's no reason to instantiate it. Note that | |
9244 | retrieve_specialization gives us both instantiations and | |
9245 | specializations, so we must explicitly check | |
9246 | DECL_TEMPLATE_SPECIALIZATION. */ | |
9247 | gen_tmpl = most_general_template (tmpl); | |
9248 | spec = retrieve_specialization (gen_tmpl, args); | |
9249 | if (spec != NULL_TREE && DECL_TEMPLATE_SPECIALIZATION (spec)) | |
9250 | return spec; | |
9251 | ||
9252 | /* This needs to happen before any tsubsting. */ | |
9253 | if (! push_tinst_level (d)) | |
9254 | return d; | |
9255 | ||
4d85e00e MM |
9256 | /* Set TD to the template whose DECL_TEMPLATE_RESULT is the pattern |
9257 | for the instantiation. This is not always the most general | |
9258 | template. Consider, for example: | |
9259 | ||
9260 | template <class T> | |
9261 | struct S { template <class U> void f(); | |
9262 | template <> void f<int>(); }; | |
9263 | ||
9264 | and an instantiation of S<double>::f<int>. We want TD to be the | |
9265 | specialization S<T>::f<int>, not the more general S<T>::f<U>. */ | |
9266 | td = tmpl; | |
9267 | for (td = tmpl; | |
9268 | /* An instantiation cannot have a definition, so we need a | |
9269 | more general template. */ | |
9270 | DECL_TEMPLATE_INSTANTIATION (td) | |
9271 | /* We must also deal with friend templates. Given: | |
9272 | ||
9273 | template <class T> struct S { | |
9274 | template <class U> friend void f() {}; | |
9275 | }; | |
9276 | ||
9277 | S<int>::f<U> say, is not an instantiation of S<T>::f<U>, | |
9278 | so far as the language is concerned, but that's still | |
9279 | where we get the pattern for the instantiation from. On | |
9280 | ther hand, if the definition comes outside the class, say: | |
9281 | ||
9282 | template <class T> struct S { | |
9283 | template <class U> friend void f(); | |
9284 | }; | |
9285 | template <class U> friend void f() {} | |
9286 | ||
9287 | we don't need to look any further. That's what the check for | |
9288 | DECL_INITIAL is for. */ | |
9289 | || (TREE_CODE (d) == FUNCTION_DECL | |
61289ca3 | 9290 | && DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (td) |
4d85e00e | 9291 | && !DECL_INITIAL (DECL_TEMPLATE_RESULT (td))); |
f84b4be9 | 9292 | ) |
4d85e00e MM |
9293 | { |
9294 | /* The present template, TD, should not be a definition. If it | |
9295 | were a definition, we should be using it! Note that we | |
9296 | cannot restructure the loop to just keep going until we find | |
9297 | a template with a definition, since that might go too far if | |
9298 | a specialization was declared, but not defined. */ | |
4d85e00e MM |
9299 | my_friendly_assert (!(TREE_CODE (d) == VAR_DECL |
9300 | && !DECL_IN_AGGR_P (DECL_TEMPLATE_RESULT (td))), | |
9301 | 0); | |
9302 | ||
9303 | /* Fetch the more general template. */ | |
9304 | td = DECL_TI_TEMPLATE (td); | |
9305 | } | |
27bb8339 | 9306 | |
fee23f54 | 9307 | code_pattern = DECL_TEMPLATE_RESULT (td); |
27bb8339 | 9308 | |
5566b478 | 9309 | if (TREE_CODE (d) == FUNCTION_DECL) |
36a117a5 | 9310 | pattern_defined = (DECL_INITIAL (code_pattern) != NULL_TREE); |
5566b478 | 9311 | else |
36a117a5 | 9312 | pattern_defined = ! DECL_IN_AGGR_P (code_pattern); |
de22184b MS |
9313 | |
9314 | push_to_top_level (); | |
9315 | lineno = DECL_SOURCE_LINE (d); | |
9316 | input_filename = DECL_SOURCE_FILE (d); | |
9317 | ||
de22184b | 9318 | if (pattern_defined) |
5566b478 MS |
9319 | { |
9320 | repo_template_used (d); | |
9321 | ||
9322 | if (flag_external_templates && ! DECL_INTERFACE_KNOWN (d)) | |
9323 | { | |
9324 | if (flag_alt_external_templates) | |
9325 | { | |
9326 | if (interface_unknown) | |
9327 | warn_if_unknown_interface (d); | |
9328 | } | |
fee23f54 | 9329 | else if (DECL_INTERFACE_KNOWN (code_pattern)) |
5566b478 MS |
9330 | { |
9331 | DECL_INTERFACE_KNOWN (d) = 1; | |
fee23f54 | 9332 | DECL_NOT_REALLY_EXTERN (d) = ! DECL_EXTERNAL (code_pattern); |
5566b478 MS |
9333 | } |
9334 | else | |
fee23f54 | 9335 | warn_if_unknown_interface (code_pattern); |
5566b478 MS |
9336 | } |
9337 | ||
e92cc029 | 9338 | if (at_eof) |
5566b478 MS |
9339 | import_export_decl (d); |
9340 | } | |
9341 | ||
c4ae3f91 JM |
9342 | /* Reject all external templates except inline functions. */ |
9343 | if (DECL_INTERFACE_KNOWN (d) | |
9344 | && ! DECL_NOT_REALLY_EXTERN (d) | |
9345 | && ! (TREE_CODE (d) == FUNCTION_DECL && DECL_INLINE (d))) | |
9346 | goto out; | |
9347 | ||
67ffc812 | 9348 | if (TREE_CODE (d) == VAR_DECL |
711734a9 | 9349 | && TREE_READONLY (d) |
67ffc812 MM |
9350 | && DECL_INITIAL (d) == NULL_TREE |
9351 | && DECL_INITIAL (code_pattern) != NULL_TREE) | |
9352 | /* We need to set up DECL_INITIAL regardless of pattern_defined if | |
9353 | the variable is a static const initialized in the class body. */; | |
9354 | else if (! pattern_defined | |
9355 | || (! (TREE_CODE (d) == FUNCTION_DECL && DECL_INLINE (d) && nested) | |
9356 | && ! at_eof)) | |
5566b478 | 9357 | { |
67ffc812 | 9358 | /* Defer all templates except inline functions used in another |
c27be9b9 JM |
9359 | function. We restore the source position here because it's used |
9360 | by add_pending_template. */ | |
9361 | lineno = line; | |
9362 | input_filename = file; | |
9363 | ||
03d0f4af MM |
9364 | if (at_eof && !pattern_defined |
9365 | && DECL_EXPLICIT_INSTANTIATION (d)) | |
9366 | /* [temp.explicit] | |
9367 | ||
9368 | The definition of a non-exported function template, a | |
9369 | non-exported member function template, or a non-exported | |
9370 | member function or static data member of a class template | |
9371 | shall be present in every translation unit in which it is | |
9372 | explicitly instantiated. */ | |
8251199e | 9373 | cp_error ("explicit instantiation of `%D' but no definition available", |
03d0f4af MM |
9374 | d); |
9375 | ||
5566b478 | 9376 | add_pending_template (d); |
de22184b | 9377 | goto out; |
5566b478 MS |
9378 | } |
9379 | ||
2b0a63a3 MM |
9380 | /* We're now committed to instantiating this template. Mark it as |
9381 | instantiated so that recursive calls to instantiate_decl do not | |
9382 | try to instantiate it again. */ | |
fbf1c34b | 9383 | DECL_TEMPLATE_INSTANTIATED (d) = 1; |
120722ac | 9384 | |
2b0a63a3 MM |
9385 | /* Regenerate the declaration in case the template has been modified |
9386 | by a subsequent redeclaration. */ | |
9387 | regenerate_decl_from_template (d, td); | |
9388 | ||
120722ac MM |
9389 | /* We already set the file and line above. Reset them now in case |
9390 | they changed as a result of calling regenerate_decl_from_template. */ | |
5156628f MS |
9391 | lineno = DECL_SOURCE_LINE (d); |
9392 | input_filename = DECL_SOURCE_FILE (d); | |
9393 | ||
5566b478 MS |
9394 | if (TREE_CODE (d) == VAR_DECL) |
9395 | { | |
9396 | DECL_IN_AGGR_P (d) = 0; | |
9397 | if (DECL_INTERFACE_KNOWN (d)) | |
9398 | DECL_EXTERNAL (d) = ! DECL_NOT_REALLY_EXTERN (d); | |
9399 | else | |
9400 | { | |
9401 | DECL_EXTERNAL (d) = 1; | |
9402 | DECL_NOT_REALLY_EXTERN (d) = 1; | |
9403 | } | |
9404 | cp_finish_decl (d, DECL_INITIAL (d), NULL_TREE, 0, 0); | |
9405 | } | |
9406 | else if (TREE_CODE (d) == FUNCTION_DECL) | |
9407 | { | |
fee23f54 | 9408 | tree t = DECL_SAVED_TREE (code_pattern); |
5566b478 | 9409 | |
c11b6f21 | 9410 | start_function (NULL_TREE, d, NULL_TREE, 1); |
5566b478 MS |
9411 | store_parm_decls (); |
9412 | ||
e76a2646 MS |
9413 | if (t && TREE_CODE (t) == RETURN_INIT) |
9414 | { | |
9415 | store_return_init | |
9416 | (TREE_OPERAND (t, 0), | |
4393e105 | 9417 | tsubst_expr (TREE_OPERAND (t, 1), args, /*complain=*/1, tmpl)); |
e76a2646 MS |
9418 | t = TREE_CHAIN (t); |
9419 | } | |
9420 | ||
5566b478 MS |
9421 | if (t && TREE_CODE (t) == CTOR_INITIALIZER) |
9422 | { | |
9423 | current_member_init_list | |
9424 | = tsubst_expr_values (TREE_OPERAND (t, 0), args); | |
9425 | current_base_init_list | |
9426 | = tsubst_expr_values (TREE_OPERAND (t, 1), args); | |
9427 | t = TREE_CHAIN (t); | |
9428 | } | |
9429 | ||
9430 | setup_vtbl_ptr (); | |
9431 | /* Always keep the BLOCK node associated with the outermost | |
956d6950 | 9432 | pair of curly braces of a function. These are needed |
5566b478 MS |
9433 | for correct operation of dwarfout.c. */ |
9434 | keep_next_level (); | |
9435 | ||
9436 | my_friendly_assert (TREE_CODE (t) == COMPOUND_STMT, 42); | |
4393e105 | 9437 | tsubst_expr (t, args, /*complain=*/1, tmpl); |
a28e3c7f | 9438 | |
5566b478 | 9439 | finish_function (lineno, 0, nested); |
5566b478 MS |
9440 | } |
9441 | ||
de22184b | 9442 | out: |
c27be9b9 JM |
9443 | lineno = line; |
9444 | input_filename = file; | |
9445 | ||
5566b478 | 9446 | pop_from_top_level (); |
5566b478 | 9447 | pop_tinst_level (); |
a28e3c7f | 9448 | |
a28e3c7f MS |
9449 | return d; |
9450 | } | |
5566b478 | 9451 | |
0aafb128 MM |
9452 | /* Run through the list of templates that we wish we could |
9453 | instantiate, and instantiate any we can. */ | |
9454 | ||
9455 | int | |
9456 | instantiate_pending_templates () | |
9457 | { | |
9458 | tree *t; | |
9459 | int instantiated_something = 0; | |
9460 | int reconsider; | |
9461 | ||
9462 | do | |
9463 | { | |
9464 | reconsider = 0; | |
9465 | ||
9466 | t = &pending_templates; | |
9467 | while (*t) | |
9468 | { | |
9469 | tree srcloc = TREE_PURPOSE (*t); | |
9470 | tree instantiation = TREE_VALUE (*t); | |
9471 | ||
9472 | input_filename = SRCLOC_FILE (srcloc); | |
9473 | lineno = SRCLOC_LINE (srcloc); | |
9474 | ||
9475 | if (TREE_CODE_CLASS (TREE_CODE (instantiation)) == 't') | |
9476 | { | |
9477 | tree fn; | |
9478 | ||
9479 | if (!TYPE_SIZE (instantiation)) | |
9480 | { | |
9481 | instantiate_class_template (instantiation); | |
9482 | if (CLASSTYPE_TEMPLATE_INSTANTIATION (instantiation)) | |
9483 | for (fn = TYPE_METHODS (instantiation); | |
9484 | fn; | |
9485 | fn = TREE_CHAIN (fn)) | |
9486 | if (! DECL_ARTIFICIAL (fn)) | |
9487 | instantiate_decl (fn); | |
9488 | if (TYPE_SIZE (instantiation)) | |
9489 | { | |
9490 | instantiated_something = 1; | |
9491 | reconsider = 1; | |
9492 | } | |
9493 | } | |
9494 | ||
9495 | if (TYPE_SIZE (instantiation)) | |
9496 | /* If INSTANTIATION has been instantiated, then we don't | |
9497 | need to consider it again in the future. */ | |
9498 | *t = TREE_CHAIN (*t); | |
9499 | else | |
9500 | t = &TREE_CHAIN (*t); | |
9501 | } | |
9502 | else | |
9503 | { | |
9504 | if (DECL_TEMPLATE_INSTANTIATION (instantiation) | |
9505 | && !DECL_TEMPLATE_INSTANTIATED (instantiation)) | |
9506 | { | |
9507 | instantiation = instantiate_decl (instantiation); | |
9508 | if (DECL_TEMPLATE_INSTANTIATED (instantiation)) | |
9509 | { | |
9510 | instantiated_something = 1; | |
9511 | reconsider = 1; | |
9512 | } | |
9513 | } | |
9514 | ||
9515 | if (!DECL_TEMPLATE_INSTANTIATION (instantiation) | |
9516 | || DECL_TEMPLATE_INSTANTIATED (instantiation)) | |
9517 | /* If INSTANTIATION has been instantiated, then we don't | |
9518 | need to consider it again in the future. */ | |
9519 | *t = TREE_CHAIN (*t); | |
9520 | else | |
9521 | t = &TREE_CHAIN (*t); | |
9522 | } | |
9523 | } | |
9524 | template_tail = t; | |
9525 | ||
9526 | /* Go through the things that are template instantiations if we are | |
9527 | using guiding declarations. */ | |
9528 | t = &maybe_templates; | |
9529 | while (*t) | |
9530 | { | |
9531 | tree template; | |
9532 | tree fn; | |
9533 | tree args; | |
9534 | ||
9535 | fn = TREE_VALUE (*t); | |
9536 | ||
9537 | if (DECL_INITIAL (fn)) | |
9538 | /* If the FN is already defined, then it was either already | |
9539 | instantiated or, even though guiding declarations were | |
9540 | allowed, a non-template definition was provided. */ | |
9541 | ; | |
9542 | else | |
9543 | { | |
9544 | template = TREE_PURPOSE (*t); | |
9545 | args = get_bindings (template, fn, NULL_TREE); | |
9546 | fn = instantiate_template (template, args); | |
9547 | instantiate_decl (fn); | |
9548 | reconsider = 1; | |
9549 | } | |
9550 | ||
9551 | /* Remove this entry from the chain. */ | |
9552 | *t = TREE_CHAIN (*t); | |
9553 | } | |
9554 | maybe_template_tail = t; | |
9555 | } | |
9556 | while (reconsider); | |
9557 | ||
9558 | return instantiated_something; | |
9559 | } | |
9560 | ||
4393e105 MM |
9561 | /* Substitute ARGVEC into T, which is a TREE_LIST. In particular, it |
9562 | is an initializer list: the TREE_PURPOSEs are DECLs, and the | |
9563 | TREE_VALUEs are initializer values. Used by instantiate_decl. */ | |
9564 | ||
824b9a4c | 9565 | static tree |
5566b478 MS |
9566 | tsubst_expr_values (t, argvec) |
9567 | tree t, argvec; | |
9568 | { | |
9569 | tree first = NULL_TREE; | |
9570 | tree *p = &first; | |
9571 | ||
9572 | for (; t; t = TREE_CHAIN (t)) | |
9573 | { | |
4393e105 MM |
9574 | tree pur = tsubst_copy (TREE_PURPOSE (t), argvec, |
9575 | /*complain=*/1, NULL_TREE); | |
9576 | tree val = tsubst_expr (TREE_VALUE (t), argvec, /*complain=*/1, | |
9577 | NULL_TREE); | |
5566b478 MS |
9578 | *p = build_tree_list (pur, val); |
9579 | p = &TREE_CHAIN (*p); | |
9580 | } | |
9581 | return first; | |
9582 | } | |
9583 | ||
9584 | tree last_tree; | |
9585 | ||
9586 | void | |
9587 | add_tree (t) | |
9588 | tree t; | |
9589 | { | |
9590 | last_tree = TREE_CHAIN (last_tree) = t; | |
9591 | } | |
73aad9b9 | 9592 | |
75650646 MM |
9593 | |
9594 | void | |
9595 | begin_tree () | |
9596 | { | |
9597 | saved_trees = tree_cons (NULL_TREE, last_tree, saved_trees); | |
9598 | last_tree = NULL_TREE; | |
9599 | } | |
9600 | ||
9601 | ||
9602 | void | |
9603 | end_tree () | |
9604 | { | |
9605 | my_friendly_assert (saved_trees != NULL_TREE, 0); | |
9606 | ||
9607 | last_tree = TREE_VALUE (saved_trees); | |
9608 | saved_trees = TREE_CHAIN (saved_trees); | |
9609 | } | |
9610 | ||
73aad9b9 JM |
9611 | /* D is an undefined function declaration in the presence of templates with |
9612 | the same name, listed in FNS. If one of them can produce D as an | |
9613 | instantiation, remember this so we can instantiate it at EOF if D has | |
9614 | not been defined by that time. */ | |
9615 | ||
9616 | void | |
9617 | add_maybe_template (d, fns) | |
9618 | tree d, fns; | |
9619 | { | |
9620 | tree t; | |
9621 | ||
9622 | if (DECL_MAYBE_TEMPLATE (d)) | |
9623 | return; | |
9624 | ||
e1467ff2 | 9625 | t = most_specialized (fns, d, NULL_TREE); |
73aad9b9 JM |
9626 | if (! t) |
9627 | return; | |
9628 | if (t == error_mark_node) | |
9629 | { | |
8251199e | 9630 | cp_error ("ambiguous template instantiation for `%D'", d); |
73aad9b9 JM |
9631 | return; |
9632 | } | |
9633 | ||
9634 | *maybe_template_tail = perm_tree_cons (t, d, NULL_TREE); | |
9635 | maybe_template_tail = &TREE_CHAIN (*maybe_template_tail); | |
9636 | DECL_MAYBE_TEMPLATE (d) = 1; | |
9637 | } | |
b87692e5 | 9638 | |
61a127b3 MM |
9639 | /* Set CURRENT_ACCESS_SPECIFIER based on the protection of DECL. */ |
9640 | ||
9641 | static void | |
9642 | set_current_access_from_decl (decl) | |
9643 | tree decl; | |
9644 | { | |
9645 | if (TREE_PRIVATE (decl)) | |
9646 | current_access_specifier = access_private_node; | |
9647 | else if (TREE_PROTECTED (decl)) | |
9648 | current_access_specifier = access_protected_node; | |
9649 | else | |
9650 | current_access_specifier = access_public_node; | |
9651 | } | |
9652 | ||
dbfe2124 MM |
9653 | /* Instantiate an enumerated type. TAG is the template type, NEWTAG |
9654 | is the instantiation (which should have been created with | |
9655 | start_enum) and ARGS are the template arguments to use. */ | |
b87692e5 | 9656 | |
dbfe2124 MM |
9657 | static void |
9658 | tsubst_enum (tag, newtag, args) | |
9659 | tree tag; | |
9660 | tree newtag; | |
9661 | tree args; | |
b87692e5 | 9662 | { |
dbfe2124 | 9663 | tree e; |
b87692e5 MS |
9664 | |
9665 | for (e = TYPE_VALUES (tag); e; e = TREE_CHAIN (e)) | |
9666 | { | |
61a127b3 MM |
9667 | tree value; |
9668 | tree elt; | |
9669 | ||
9670 | /* Note that in a template enum, the TREE_VALUE is the | |
9671 | CONST_DECL, not the corresponding INTEGER_CST. */ | |
9672 | value = tsubst_expr (DECL_INITIAL (TREE_VALUE (e)), | |
4393e105 MM |
9673 | args, /*complain=*/1, |
9674 | NULL_TREE); | |
61a127b3 MM |
9675 | |
9676 | /* Give this enumeration constant the correct access. */ | |
9677 | set_current_access_from_decl (TREE_VALUE (e)); | |
9678 | ||
9679 | /* Actually build the enumerator itself. */ | |
9680 | elt = build_enumerator (TREE_PURPOSE (e), value, newtag); | |
b87692e5 | 9681 | |
dbfe2124 MM |
9682 | /* We save the enumerators we have built so far in the |
9683 | TYPE_VALUES so that if the enumeration constants for | |
9684 | subsequent enumerators involve those for previous ones, | |
9685 | tsubst_copy will be able to find them. */ | |
9686 | TREE_CHAIN (elt) = TYPE_VALUES (newtag); | |
9687 | TYPE_VALUES (newtag) = elt; | |
9688 | } | |
b3d5a58b | 9689 | |
dbfe2124 | 9690 | finish_enum (newtag); |
b87692e5 | 9691 | } |
36a117a5 MM |
9692 | |
9693 | /* Set the DECL_ASSEMBLER_NAME for DECL, which is a FUNCTION_DECL that | |
9694 | is either an instantiation or specialization of a template | |
9695 | function. */ | |
9696 | ||
9697 | static void | |
9698 | set_mangled_name_for_template_decl (decl) | |
9699 | tree decl; | |
9700 | { | |
9701 | tree saved_namespace; | |
b370501f | 9702 | tree context = NULL_TREE; |
36a117a5 MM |
9703 | tree fn_type; |
9704 | tree ret_type; | |
9705 | tree parm_types; | |
9706 | tree tparms; | |
9707 | tree targs; | |
9708 | tree tmpl; | |
9709 | int parm_depth; | |
9710 | ||
9711 | my_friendly_assert (TREE_CODE (decl) == FUNCTION_DECL, 0); | |
9712 | my_friendly_assert (DECL_TEMPLATE_INFO (decl) != NULL_TREE, 0); | |
9713 | ||
9714 | /* The names of template functions must be mangled so as to indicate | |
9715 | what template is being specialized with what template arguments. | |
9716 | For example, each of the following three functions must get | |
9717 | different mangled names: | |
9718 | ||
9719 | void f(int); | |
9720 | template <> void f<7>(int); | |
9721 | template <> void f<8>(int); */ | |
9722 | ||
9723 | targs = DECL_TI_ARGS (decl); | |
9724 | if (uses_template_parms (targs)) | |
9725 | /* This DECL is for a partial instantiation. There's no need to | |
9726 | mangle the name of such an entity. */ | |
9727 | return; | |
9728 | ||
9729 | tmpl = most_general_template (DECL_TI_TEMPLATE (decl)); | |
9730 | tparms = DECL_TEMPLATE_PARMS (tmpl); | |
9731 | parm_depth = TMPL_PARMS_DEPTH (tparms); | |
9732 | ||
9733 | /* There should be as many levels of arguments as there are levels | |
9734 | of parameters. */ | |
9735 | my_friendly_assert (parm_depth == TMPL_ARGS_DEPTH (targs), 0); | |
9736 | ||
9737 | /* We now compute the PARMS and RET_TYPE to give to | |
9738 | build_decl_overload_real. The PARMS and RET_TYPE are the | |
9739 | parameter and return types of the template, after all but the | |
9740 | innermost template arguments have been substituted, not the | |
9741 | parameter and return types of the function DECL. For example, | |
9742 | given: | |
9743 | ||
9744 | template <class T> T f(T); | |
9745 | ||
9746 | both PARMS and RET_TYPE should be `T' even if DECL is `int f(int)'. | |
9747 | A more subtle example is: | |
9748 | ||
9749 | template <class T> struct S { template <class U> void f(T, U); } | |
9750 | ||
9751 | Here, if DECL is `void S<int>::f(int, double)', PARMS should be | |
9752 | {int, U}. Thus, the args that we want to subsitute into the | |
9753 | return and parameter type for the function are those in TARGS, | |
9754 | with the innermost level omitted. */ | |
9755 | fn_type = TREE_TYPE (tmpl); | |
9756 | if (DECL_STATIC_FUNCTION_P (decl)) | |
61a127b3 | 9757 | context = DECL_CLASS_CONTEXT (decl); |
36a117a5 MM |
9758 | |
9759 | if (parm_depth == 1) | |
9760 | /* No substitution is necessary. */ | |
9761 | ; | |
9762 | else | |
9763 | { | |
9764 | int i; | |
9765 | tree partial_args; | |
9766 | ||
9767 | /* Replace the innermost level of the TARGS with NULL_TREEs to | |
9768 | let tsubst know not to subsitute for those parameters. */ | |
9769 | partial_args = make_temp_vec (TREE_VEC_LENGTH (targs)); | |
9770 | for (i = 1; i < TMPL_ARGS_DEPTH (targs); ++i) | |
9771 | SET_TMPL_ARGS_LEVEL (partial_args, i, | |
9772 | TMPL_ARGS_LEVEL (targs, i)); | |
9773 | SET_TMPL_ARGS_LEVEL (partial_args, | |
9774 | TMPL_ARGS_DEPTH (targs), | |
9775 | make_temp_vec (DECL_NTPARMS (tmpl))); | |
9776 | ||
9777 | /* Now, do the (partial) substitution to figure out the | |
9778 | appropriate function type. */ | |
4393e105 | 9779 | fn_type = tsubst (fn_type, partial_args, /*complain=*/1, NULL_TREE); |
36a117a5 | 9780 | if (DECL_STATIC_FUNCTION_P (decl)) |
4393e105 | 9781 | context = tsubst (context, partial_args, /*complain=*/1, NULL_TREE); |
36a117a5 MM |
9782 | |
9783 | /* Substitute into the template parameters to obtain the real | |
9784 | innermost set of parameters. This step is important if the | |
9785 | innermost set of template parameters contains value | |
9786 | parameters whose types depend on outer template parameters. */ | |
9787 | TREE_VEC_LENGTH (partial_args)--; | |
4393e105 | 9788 | tparms = tsubst_template_parms (tparms, partial_args, /*complain=*/1); |
36a117a5 MM |
9789 | } |
9790 | ||
9791 | /* Now, get the innermost parameters and arguments, and figure out | |
9792 | the parameter and return types. */ | |
9793 | tparms = INNERMOST_TEMPLATE_PARMS (tparms); | |
9794 | targs = innermost_args (targs); | |
9795 | ret_type = TREE_TYPE (fn_type); | |
9796 | parm_types = TYPE_ARG_TYPES (fn_type); | |
9797 | ||
9798 | /* For a static member function, we generate a fake `this' pointer, | |
9799 | for the purposes of mangling. This indicates of which class the | |
9800 | function is a member. Because of: | |
9801 | ||
9802 | [class.static] | |
9803 | ||
9804 | There shall not be a static and a nonstatic member function | |
9805 | with the same name and the same parameter types | |
9806 | ||
9807 | we don't have to worry that this will result in a clash with a | |
9808 | non-static member function. */ | |
9809 | if (DECL_STATIC_FUNCTION_P (decl)) | |
9810 | parm_types = hash_tree_chain (build_pointer_type (context), parm_types); | |
9811 | ||
9812 | /* There should be the same number of template parameters as | |
9813 | template arguments. */ | |
9814 | my_friendly_assert (TREE_VEC_LENGTH (tparms) == TREE_VEC_LENGTH (targs), | |
9815 | 0); | |
9816 | ||
9817 | /* If the template is in a namespace, we need to put that into the | |
9818 | mangled name. Unfortunately, build_decl_overload_real does not | |
9819 | get the decl to mangle, so it relies on the current | |
9820 | namespace. Therefore, we set that here temporarily. */ | |
9821 | my_friendly_assert (TREE_CODE_CLASS (TREE_CODE (decl)) == 'd', 980702); | |
9822 | saved_namespace = current_namespace; | |
9823 | current_namespace = CP_DECL_CONTEXT (decl); | |
9824 | ||
9825 | /* Actually set the DCL_ASSEMBLER_NAME. */ | |
9826 | DECL_ASSEMBLER_NAME (decl) | |
9827 | = build_decl_overload_real (DECL_NAME (decl), parm_types, ret_type, | |
9828 | tparms, targs, | |
9829 | DECL_FUNCTION_MEMBER_P (decl) | |
9830 | + DECL_CONSTRUCTOR_P (decl)); | |
9831 | ||
9832 | /* Restore the previously active namespace. */ | |
9833 | current_namespace = saved_namespace; | |
9834 | } |