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8d08fdba | 1 | /* Handle parameterized types (templates) for GNU C++. |
956d6950 | 2 | Copyright (C) 1992, 93, 94, 95, 96, 1997 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" |
49c249e1 | 42 | |
050367a3 MM |
43 | /* The type of functions taking a tree, and some additional data, and |
44 | returning an int. */ | |
45 | typedef int (*tree_fn_t) PROTO((tree, void*)); | |
46 | ||
8d08fdba | 47 | extern struct obstack permanent_obstack; |
8d08fdba MS |
48 | |
49 | extern int lineno; | |
50 | extern char *input_filename; | |
51 | struct pending_inline *pending_template_expansions; | |
52 | ||
5566b478 MS |
53 | tree current_template_parms; |
54 | HOST_WIDE_INT processing_template_decl; | |
8d08fdba | 55 | |
5566b478 MS |
56 | tree pending_templates; |
57 | static tree *template_tail = &pending_templates; | |
58 | ||
73aad9b9 JM |
59 | tree maybe_templates; |
60 | static tree *maybe_template_tail = &maybe_templates; | |
61 | ||
5566b478 | 62 | int minimal_parse_mode; |
75b0bbce | 63 | |
92eca640 | 64 | int processing_specialization; |
75650646 | 65 | int processing_explicit_instantiation; |
386b8a85 JM |
66 | static int template_header_count; |
67 | ||
75650646 MM |
68 | static tree saved_trees; |
69 | ||
8d08fdba MS |
70 | #define obstack_chunk_alloc xmalloc |
71 | #define obstack_chunk_free free | |
72 | ||
830bfa74 MM |
73 | #define UNIFY_ALLOW_NONE 0 |
74 | #define UNIFY_ALLOW_MORE_CV_QUAL 1 | |
75 | #define UNIFY_ALLOW_LESS_CV_QUAL 2 | |
76 | #define UNIFY_ALLOW_DERIVED 4 | |
77 | ||
78 | static int unify PROTO((tree, tree, tree, tree, int, int*)); | |
49c249e1 JM |
79 | static void add_pending_template PROTO((tree)); |
80 | static int push_tinst_level PROTO((tree)); | |
81 | static tree classtype_mangled_name PROTO((tree)); | |
75650646 | 82 | static char *mangle_class_name_for_template PROTO((char *, tree, tree, tree)); |
49c249e1 | 83 | static tree tsubst_expr_values PROTO((tree, tree)); |
49c249e1 | 84 | static int list_eq PROTO((tree, tree)); |
8d019cef | 85 | static tree get_class_bindings PROTO((tree, tree, tree, tree)); |
de575009 | 86 | static tree coerce_template_parms PROTO((tree, tree, tree, int, int, int)); |
f7d98d58 | 87 | static tree tsubst_enum PROTO((tree, tree, tree *)); |
98c1c668 | 88 | static tree add_to_template_args PROTO((tree, tree)); |
830bfa74 MM |
89 | static void maybe_adjust_types_for_deduction PROTO((unification_kind_t, tree*, |
90 | tree*)); | |
050367a3 | 91 | static int type_unification_real PROTO((tree, tree, tree, tree, |
830bfa74 | 92 | int, unification_kind_t, int, int*)); |
e6f1275f | 93 | static tree complete_template_args PROTO((tree, tree, int)); |
386b8a85 | 94 | static void note_template_header PROTO((int)); |
840b09b4 | 95 | static tree maybe_fold_nontype_arg PROTO((tree)); |
e1467ff2 | 96 | static tree convert_nontype_argument PROTO((tree, tree)); |
76b9a14d | 97 | static tree get_bindings_overload PROTO((tree, tree, tree)); |
050367a3 | 98 | static int for_each_template_parm PROTO((tree, tree_fn_t, void*)); |
4b580446 | 99 | static tree build_template_parm_index PROTO((int, int, int, tree, tree)); |
69ac77ce JL |
100 | static tree original_template PROTO((tree)); |
101 | static int inline_needs_template_parms PROTO((tree)); | |
102 | static void push_inline_template_parms_recursive PROTO((tree, int)); | |
103 | static tree retrieve_specialization PROTO((tree, tree)); | |
104 | static void register_specialization PROTO((tree, tree, tree)); | |
105 | static void print_candidates PROTO((tree)); | |
106 | static tree reduce_template_parm_level PROTO((tree, tree, int)); | |
107 | static tree build_template_decl PROTO((tree, tree)); | |
108 | static int mark_template_parm PROTO((tree, void *)); | |
109 | static tree tsubst_friend_function PROTO((tree, tree)); | |
6757edfe | 110 | static tree tsubst_friend_class PROTO((tree, tree)); |
69ac77ce | 111 | static tree get_bindings_real PROTO((tree, tree, tree, int)); |
04a81d94 | 112 | static int template_decl_level PROTO((tree)); |
a2b60a0e | 113 | static tree maybe_get_template_decl_from_type_decl PROTO((tree)); |
830bfa74 MM |
114 | static int check_cv_quals_for_unify PROTO((int, tree, tree)); |
115 | static tree tsubst_template_arg_vector PROTO((tree, tree)); | |
116 | static void regenerate_decl_from_template PROTO((tree, tree)); | |
e1467ff2 MM |
117 | |
118 | /* Do any processing required when DECL (a member template declaration | |
119 | using TEMPLATE_PARAMETERS as its innermost parameter list) is | |
120 | finished. Returns the TEMPLATE_DECL corresponding to DECL, unless | |
121 | it is a specialization, in which case the DECL itself is returned. */ | |
122 | ||
123 | tree | |
124 | finish_member_template_decl (template_parameters, decl) | |
125 | tree template_parameters; | |
126 | tree decl; | |
127 | { | |
128 | if (template_parameters) | |
93cdc044 | 129 | end_template_decl (); |
e1467ff2 | 130 | else |
93cdc044 | 131 | end_specialization (); |
e1467ff2 | 132 | |
93cdc044 JM |
133 | if (decl == NULL_TREE || decl == void_type_node) |
134 | return NULL_TREE; | |
135 | else if (TREE_CODE (decl) == TREE_LIST) | |
136 | { | |
5f311aec | 137 | /* Assume that the class is the only declspec. */ |
93cdc044 | 138 | decl = TREE_VALUE (decl); |
8d019cef JM |
139 | if (IS_AGGR_TYPE (decl) && CLASSTYPE_TEMPLATE_INFO (decl) |
140 | && ! CLASSTYPE_TEMPLATE_SPECIALIZATION (decl)) | |
93cdc044 JM |
141 | { |
142 | tree tmpl = CLASSTYPE_TI_TEMPLATE (decl); | |
143 | check_member_template (tmpl); | |
144 | return tmpl; | |
145 | } | |
8d019cef | 146 | return NULL_TREE; |
93cdc044 | 147 | } |
a1da6cba | 148 | else if (DECL_TEMPLATE_INFO (decl)) |
e1467ff2 | 149 | { |
a1da6cba MM |
150 | if (!DECL_TEMPLATE_SPECIALIZATION (decl)) |
151 | { | |
152 | check_member_template (DECL_TI_TEMPLATE (decl)); | |
153 | return DECL_TI_TEMPLATE (decl); | |
154 | } | |
155 | else | |
156 | return decl; | |
157 | } | |
158 | else | |
159 | cp_error ("invalid member template declaration `%D'", decl); | |
160 | ||
e1467ff2 | 161 | |
a1da6cba | 162 | return error_mark_node; |
f84b4be9 | 163 | } |
e1467ff2 | 164 | |
f84b4be9 JM |
165 | /* Returns the template nesting level of the indicated class TYPE. |
166 | ||
167 | For example, in: | |
168 | template <class T> | |
169 | struct A | |
170 | { | |
171 | template <class U> | |
172 | struct B {}; | |
173 | }; | |
174 | ||
175 | A<T>::B<U> has depth two, while A<T> has depth one. Also, | |
176 | both A<T>::B<int> and A<int>::B<U> have depth one. */ | |
177 | ||
178 | int | |
179 | template_class_depth (type) | |
180 | tree type; | |
181 | { | |
93cdc044 | 182 | int depth; |
f84b4be9 | 183 | |
2c73f9f5 ML |
184 | for (depth = 0; |
185 | type && TREE_CODE (type) != FUNCTION_DECL | |
186 | && TREE_CODE (type) != NAMESPACE_DECL; | |
93cdc044 JM |
187 | type = TYPE_CONTEXT (type)) |
188 | if (CLASSTYPE_TEMPLATE_INFO (type) | |
189 | && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (type)) | |
190 | && uses_template_parms (CLASSTYPE_TI_ARGS (type))) | |
191 | ++depth; | |
f84b4be9 JM |
192 | |
193 | return depth; | |
e1467ff2 | 194 | } |
98c1c668 | 195 | |
cae40af6 JM |
196 | /* Return the original template for this decl, disregarding any |
197 | specializations. */ | |
98c1c668 | 198 | |
cae40af6 JM |
199 | static tree |
200 | original_template (decl) | |
786b5245 | 201 | tree decl; |
98c1c668 | 202 | { |
cae40af6 JM |
203 | while (DECL_TEMPLATE_INFO (decl)) |
204 | decl = DECL_TI_TEMPLATE (decl); | |
205 | return decl; | |
206 | } | |
98c1c668 | 207 | |
cae40af6 JM |
208 | /* Returns 1 if processing DECL as part of do_pending_inlines |
209 | needs us to push template parms. */ | |
210 | ||
211 | static int | |
212 | inline_needs_template_parms (decl) | |
213 | tree decl; | |
214 | { | |
215 | if (! DECL_TEMPLATE_INFO (decl)) | |
216 | return 0; | |
f84b4be9 | 217 | |
cae40af6 JM |
218 | return (list_length (DECL_TEMPLATE_PARMS (original_template (decl))) |
219 | > (processing_template_decl + DECL_TEMPLATE_SPECIALIZATION (decl))); | |
220 | } | |
221 | ||
222 | /* Subroutine of maybe_begin_member_template_processing. | |
223 | Push the template parms in PARMS, starting from LEVELS steps into the | |
224 | chain, and ending at the beginning, since template parms are listed | |
225 | innermost first. */ | |
226 | ||
227 | static void | |
228 | push_inline_template_parms_recursive (parmlist, levels) | |
229 | tree parmlist; | |
230 | int levels; | |
231 | { | |
232 | tree parms = TREE_VALUE (parmlist); | |
233 | int i; | |
234 | ||
235 | if (levels > 1) | |
236 | push_inline_template_parms_recursive (TREE_CHAIN (parmlist), levels - 1); | |
786b5245 | 237 | |
98c1c668 | 238 | ++processing_template_decl; |
cae40af6 | 239 | current_template_parms |
98c1c668 JM |
240 | = tree_cons (build_int_2 (0, processing_template_decl), |
241 | parms, current_template_parms); | |
cae40af6 JM |
242 | TEMPLATE_PARMS_FOR_INLINE (current_template_parms) = 1; |
243 | ||
786b5245 | 244 | pushlevel (0); |
98c1c668 JM |
245 | for (i = 0; i < TREE_VEC_LENGTH (parms); ++i) |
246 | { | |
786b5245 MM |
247 | tree parm = TREE_VALUE (TREE_VEC_ELT (parms, i)); |
248 | my_friendly_assert (TREE_CODE_CLASS (TREE_CODE (parm)) == 'd', 0); | |
cae40af6 | 249 | |
98c1c668 JM |
250 | switch (TREE_CODE (parm)) |
251 | { | |
786b5245 | 252 | case TYPE_DECL: |
73b0fce8 | 253 | case TEMPLATE_DECL: |
98c1c668 JM |
254 | pushdecl (parm); |
255 | break; | |
786b5245 MM |
256 | |
257 | case PARM_DECL: | |
258 | { | |
259 | /* Make a CONST_DECL as is done in process_template_parm. */ | |
260 | tree decl = build_decl (CONST_DECL, DECL_NAME (parm), | |
261 | TREE_TYPE (parm)); | |
262 | DECL_INITIAL (decl) = DECL_INITIAL (parm); | |
263 | pushdecl (decl); | |
264 | } | |
cae40af6 | 265 | break; |
786b5245 | 266 | |
98c1c668 JM |
267 | default: |
268 | my_friendly_abort (0); | |
269 | } | |
270 | } | |
271 | } | |
272 | ||
cae40af6 JM |
273 | /* Restore the template parameter context for a member template or |
274 | a friend template defined in a class definition. */ | |
275 | ||
276 | void | |
277 | maybe_begin_member_template_processing (decl) | |
278 | tree decl; | |
279 | { | |
280 | tree parms; | |
281 | int levels; | |
282 | ||
283 | if (! inline_needs_template_parms (decl)) | |
284 | return; | |
285 | ||
286 | parms = DECL_TEMPLATE_PARMS (original_template (decl)); | |
287 | ||
288 | levels = list_length (parms) - processing_template_decl; | |
289 | ||
290 | if (DECL_TEMPLATE_SPECIALIZATION (decl)) | |
291 | { | |
292 | --levels; | |
293 | parms = TREE_CHAIN (parms); | |
294 | } | |
295 | ||
296 | push_inline_template_parms_recursive (parms, levels); | |
297 | } | |
298 | ||
98c1c668 JM |
299 | /* Undo the effects of begin_member_template_processing. */ |
300 | ||
301 | void | |
f84b4be9 JM |
302 | maybe_end_member_template_processing (decl) |
303 | tree decl; | |
98c1c668 JM |
304 | { |
305 | if (! processing_template_decl) | |
306 | return; | |
307 | ||
cae40af6 JM |
308 | while (current_template_parms |
309 | && TEMPLATE_PARMS_FOR_INLINE (current_template_parms)) | |
310 | { | |
311 | --processing_template_decl; | |
312 | current_template_parms = TREE_CHAIN (current_template_parms); | |
313 | poplevel (0, 0, 0); | |
314 | } | |
98c1c668 JM |
315 | } |
316 | ||
cae40af6 | 317 | /* Returns non-zero iff T is a member template function. We must be |
f84b4be9 | 318 | careful as in |
75650646 MM |
319 | |
320 | template <class T> class C { void f(); } | |
321 | ||
322 | Here, f is a template function, and a member, but not a member | |
323 | template. This function does not concern itself with the origin of | |
324 | T, only its present state. So if we have | |
325 | ||
326 | template <class T> class C { template <class U> void f(U); } | |
327 | ||
328 | then neither C<int>::f<char> nor C<T>::f<double> is considered | |
329 | to be a member template. */ | |
98c1c668 | 330 | |
cae40af6 JM |
331 | int |
332 | is_member_template (t) | |
98c1c668 JM |
333 | tree t; |
334 | { | |
aa5f3bad MM |
335 | if (TREE_CODE (t) != FUNCTION_DECL |
336 | && !DECL_FUNCTION_TEMPLATE_P (t)) | |
75650646 | 337 | /* Anything that isn't a function or a template function is |
aa5f3bad MM |
338 | certainly not a member template. */ |
339 | return 0; | |
340 | ||
cae40af6 JM |
341 | /* A local class can't have member templates. */ |
342 | if (hack_decl_function_context (t)) | |
343 | return 0; | |
344 | ||
345 | if ((DECL_FUNCTION_MEMBER_P (t) | |
386b8a85 | 346 | && !DECL_TEMPLATE_SPECIALIZATION (t)) |
f84b4be9 | 347 | || (TREE_CODE (t) == TEMPLATE_DECL |
cae40af6 | 348 | && DECL_FUNCTION_MEMBER_P (DECL_TEMPLATE_RESULT (t)))) |
98c1c668 | 349 | { |
f84b4be9 | 350 | tree tmpl; |
98c1c668 JM |
351 | |
352 | if (DECL_FUNCTION_TEMPLATE_P (t)) | |
353 | tmpl = t; | |
354 | else if (DECL_TEMPLATE_INFO (t) | |
355 | && DECL_FUNCTION_TEMPLATE_P (DECL_TI_TEMPLATE (t))) | |
356 | tmpl = DECL_TI_TEMPLATE (t); | |
f84b4be9 JM |
357 | else |
358 | tmpl = NULL_TREE; | |
359 | ||
cae40af6 | 360 | if (tmpl |
f84b4be9 JM |
361 | /* If there are more levels of template parameters than |
362 | there are template classes surrounding the declaration, | |
363 | then we have a member template. */ | |
cae40af6 JM |
364 | && (list_length (DECL_TEMPLATE_PARMS (tmpl)) > |
365 | template_class_depth (DECL_CLASS_CONTEXT (t)))) | |
f84b4be9 JM |
366 | return 1; |
367 | } | |
98c1c668 | 368 | |
f84b4be9 JM |
369 | return 0; |
370 | } | |
98c1c668 | 371 | |
e6f1275f | 372 | /* Return a new template argument vector which contains all of ARGS |
830bfa74 | 373 | for all outer templates TMPL is contained in, but has as its |
e6f1275f JM |
374 | innermost set of arguments the EXTRA_ARGS. If UNBOUND_ONLY, we |
375 | are only interested in unbound template arguments, not arguments from | |
376 | enclosing templates that have been instantiated already. */ | |
377 | ||
378 | static tree | |
379 | complete_template_args (tmpl, extra_args, unbound_only) | |
380 | tree tmpl, extra_args; | |
381 | int unbound_only; | |
382 | { | |
383 | /* depth is the number of levels of enclosing args we're adding. */ | |
384 | int depth, i; | |
385 | tree args, new_args, spec_args = NULL_TREE; | |
830bfa74 MM |
386 | int extra_arg_depth; |
387 | ||
e6f1275f JM |
388 | my_friendly_assert (TREE_CODE (tmpl) == TEMPLATE_DECL, 0); |
389 | my_friendly_assert (TREE_CODE (extra_args) == TREE_VEC, 0); | |
390 | ||
830bfa74 MM |
391 | if (TREE_CODE (TREE_VEC_ELT (extra_args, 0)) == TREE_VEC) |
392 | extra_arg_depth = TREE_VEC_LENGTH (extra_args); | |
393 | else | |
394 | extra_arg_depth = 1; | |
395 | ||
e6f1275f JM |
396 | if (DECL_TEMPLATE_INFO (tmpl) && !unbound_only) |
397 | { | |
398 | /* A specialization of a member template of a template class shows up | |
399 | as a TEMPLATE_DECL with DECL_TEMPLATE_SPECIALIZATION set. | |
400 | DECL_TI_ARGS is the specialization args, and DECL_TI_TEMPLATE | |
401 | is the template being specialized. */ | |
402 | if (DECL_TEMPLATE_SPECIALIZATION (tmpl)) | |
403 | { | |
404 | spec_args = DECL_TI_ARGS (tmpl); | |
405 | tmpl = DECL_TI_TEMPLATE (tmpl); | |
406 | } | |
407 | ||
408 | if (DECL_TEMPLATE_INFO (tmpl)) | |
409 | { | |
410 | /* A partial instantiation of a member template shows up as a | |
411 | TEMPLATE_DECL with DECL_TEMPLATE_INFO. DECL_TI_ARGS is | |
412 | all the bound template arguments. */ | |
413 | args = DECL_TI_ARGS (tmpl); | |
414 | if (TREE_CODE (TREE_VEC_ELT (args, 0)) != TREE_VEC) | |
415 | depth = 1; | |
416 | else | |
417 | depth = TREE_VEC_LENGTH (args); | |
418 | } | |
419 | else | |
420 | /* If we are a specialization, we might have no previously bound | |
421 | template args. */ | |
422 | depth = 0; | |
423 | ||
830bfa74 | 424 | new_args = make_tree_vec (depth + extra_arg_depth + (!!spec_args)); |
e6f1275f JM |
425 | |
426 | if (depth == 1) | |
427 | TREE_VEC_ELT (new_args, 0) = args; | |
428 | else | |
429 | for (i = 0; i < depth; ++i) | |
430 | TREE_VEC_ELT (new_args, i) = TREE_VEC_ELT (args, i); | |
431 | } | |
432 | else | |
433 | { | |
434 | tree type; | |
435 | int skip; | |
436 | ||
437 | /* For unbound args, we have to do more work. We are getting bindings | |
438 | for the innermost args from extra_args, so we start from our | |
439 | context and work out until we've seen all the args. We need to | |
440 | do it this way to handle partial specialization. */ | |
441 | ||
442 | depth = list_length (DECL_TEMPLATE_PARMS (tmpl)) - 1; | |
443 | if (depth == 0) | |
444 | return extra_args; | |
445 | ||
830bfa74 | 446 | new_args = make_tree_vec (depth + extra_arg_depth); |
e6f1275f | 447 | |
9c65eeca JM |
448 | /* If this isn't a member template, extra_args is for the innermost |
449 | template class, so skip over it. */ | |
450 | skip = (! is_member_template (tmpl)); | |
e6f1275f JM |
451 | |
452 | type = DECL_REAL_CONTEXT (tmpl); | |
453 | for (i = depth; i; type = TYPE_CONTEXT (type)) | |
454 | if (PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (type))) | |
455 | { | |
456 | if (skip) | |
457 | skip = 0; | |
458 | else | |
459 | { | |
460 | --i; | |
461 | TREE_VEC_ELT (new_args, i) = CLASSTYPE_TI_ARGS (type); | |
462 | } | |
463 | } | |
464 | } | |
465 | ||
830bfa74 MM |
466 | if (extra_arg_depth == 1) |
467 | TREE_VEC_ELT (new_args, depth++) = extra_args; | |
468 | else | |
469 | for (i = 0; i < extra_arg_depth; ++i) | |
470 | TREE_VEC_ELT (new_args, depth++) = TREE_VEC_ELT (extra_args, i); | |
e6f1275f JM |
471 | |
472 | if (spec_args) | |
830bfa74 | 473 | TREE_VEC_ELT (new_args, depth) = spec_args; |
e6f1275f JM |
474 | |
475 | return new_args; | |
476 | } | |
477 | ||
98c1c668 JM |
478 | /* Return a new template argument vector which contains all of ARGS, |
479 | but has as its innermost set of arguments the EXTRA_ARGS. */ | |
480 | ||
4966381a | 481 | static tree |
98c1c668 JM |
482 | add_to_template_args (args, extra_args) |
483 | tree args; | |
484 | tree extra_args; | |
485 | { | |
486 | tree new_args; | |
487 | ||
488 | if (TREE_CODE (TREE_VEC_ELT (args, 0)) != TREE_VEC) | |
489 | { | |
490 | new_args = make_tree_vec (2); | |
491 | TREE_VEC_ELT (new_args, 0) = args; | |
492 | } | |
493 | else | |
494 | { | |
495 | int i; | |
496 | ||
db897306 | 497 | new_args = make_tree_vec (TREE_VEC_LENGTH (args) + 1); |
98c1c668 JM |
498 | |
499 | for (i = 0; i < TREE_VEC_LENGTH (args); ++i) | |
500 | TREE_VEC_ELT (new_args, i) = TREE_VEC_ELT (args, i); | |
501 | } | |
502 | ||
503 | TREE_VEC_ELT (new_args, | |
504 | TREE_VEC_LENGTH (new_args) - 1) = extra_args; | |
505 | ||
506 | return new_args; | |
507 | } | |
5566b478 MS |
508 | |
509 | /* We've got a template header coming up; push to a new level for storing | |
510 | the parms. */ | |
8d08fdba | 511 | |
8d08fdba MS |
512 | void |
513 | begin_template_parm_list () | |
514 | { | |
6757edfe MM |
515 | /* We use a non-tag-transparent scope here, which causes pushtag to |
516 | put tags in this scope, rather than in the enclosing class or | |
517 | namespace scope. This is the right thing, since we want | |
518 | TEMPLATE_DECLS, and not TYPE_DECLS for template classes. For a | |
519 | global template class, push_template_decl handles putting the | |
520 | TEMPLATE_DECL into top-level scope. For a nested template class, | |
521 | e.g.: | |
522 | ||
523 | template <class T> struct S1 { | |
524 | template <class T> struct S2 {}; | |
525 | }; | |
526 | ||
527 | pushtag contains special code to call pushdecl_with_scope on the | |
528 | TEMPLATE_DECL for S2. */ | |
8d08fdba | 529 | pushlevel (0); |
5566b478 | 530 | declare_pseudo_global_level (); |
5156628f | 531 | ++processing_template_decl; |
386b8a85 JM |
532 | note_template_header (0); |
533 | } | |
534 | ||
386b8a85 JM |
535 | /* We've just seen template <>. */ |
536 | ||
537 | void | |
538 | begin_specialization () | |
539 | { | |
540 | note_template_header (1); | |
541 | } | |
542 | ||
386b8a85 JM |
543 | /* Called at then end of processing a declaration preceeded by |
544 | template<>. */ | |
545 | ||
546 | void | |
547 | end_specialization () | |
548 | { | |
549 | reset_specialization (); | |
550 | } | |
551 | ||
386b8a85 JM |
552 | /* Any template <>'s that we have seen thus far are not referring to a |
553 | function specialization. */ | |
554 | ||
555 | void | |
556 | reset_specialization () | |
557 | { | |
558 | processing_specialization = 0; | |
559 | template_header_count = 0; | |
560 | } | |
561 | ||
386b8a85 JM |
562 | /* We've just seen a template header. If SPECIALIZATION is non-zero, |
563 | it was of the form template <>. */ | |
564 | ||
4966381a | 565 | static void |
386b8a85 JM |
566 | note_template_header (specialization) |
567 | int specialization; | |
568 | { | |
569 | processing_specialization = specialization; | |
570 | template_header_count++; | |
571 | } | |
572 | ||
75650646 | 573 | /* We're beginning an explicit instantiation. */ |
386b8a85 | 574 | |
75650646 MM |
575 | void |
576 | begin_explicit_instantiation () | |
386b8a85 | 577 | { |
75650646 MM |
578 | ++processing_explicit_instantiation; |
579 | } | |
386b8a85 | 580 | |
386b8a85 | 581 | |
75650646 MM |
582 | void |
583 | end_explicit_instantiation () | |
584 | { | |
585 | my_friendly_assert(processing_explicit_instantiation > 0, 0); | |
586 | --processing_explicit_instantiation; | |
587 | } | |
386b8a85 | 588 | |
75650646 MM |
589 | /* Retrieve the specialization (in the sense of [temp.spec] - a |
590 | specialization is either an instantiation or an explicit | |
591 | specialization) of TMPL for the given template ARGS. If there is | |
592 | no such specialization, return NULL_TREE. The ARGS are a vector of | |
593 | arguments, or a vector of vectors of arguments, in the case of | |
594 | templates with more than one level of parameters. */ | |
595 | ||
596 | static tree | |
597 | retrieve_specialization (tmpl, args) | |
598 | tree tmpl; | |
599 | tree args; | |
600 | { | |
601 | tree s; | |
602 | ||
603 | my_friendly_assert (TREE_CODE (tmpl) == TEMPLATE_DECL, 0); | |
604 | ||
605 | for (s = DECL_TEMPLATE_SPECIALIZATIONS (tmpl); | |
606 | s != NULL_TREE; | |
607 | s = TREE_CHAIN (s)) | |
608 | if (comp_template_args (TREE_PURPOSE (s), args)) | |
609 | return TREE_VALUE (s); | |
610 | ||
611 | return NULL_TREE; | |
386b8a85 JM |
612 | } |
613 | ||
6757edfe MM |
614 | /* Returns non-zero iff DECL is a specialization of TMPL. */ |
615 | ||
616 | int | |
617 | is_specialization_of (decl, tmpl) | |
618 | tree decl; | |
619 | tree tmpl; | |
620 | { | |
621 | tree t; | |
622 | ||
623 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
624 | { | |
625 | for (t = decl; | |
626 | t != NULL_TREE; | |
627 | t = DECL_TEMPLATE_INFO (t) ? DECL_TI_TEMPLATE (t) : NULL_TREE) | |
628 | if (t == tmpl) | |
629 | return 1; | |
630 | } | |
631 | else | |
632 | { | |
633 | my_friendly_assert (TREE_CODE (decl) == TYPE_DECL, 0); | |
634 | ||
635 | for (t = TREE_TYPE (decl); | |
636 | t != NULL_TREE; | |
637 | t = CLASSTYPE_USE_TEMPLATE (t) | |
638 | ? TREE_TYPE (CLASSTYPE_TI_TEMPLATE (t)) : NULL_TREE) | |
639 | if (comptypes (TYPE_MAIN_VARIANT (t), | |
640 | TYPE_MAIN_VARIANT (TREE_TYPE (tmpl)), 1)) | |
641 | return 1; | |
642 | } | |
386b8a85 | 643 | |
6757edfe MM |
644 | return 0; |
645 | } | |
75650646 MM |
646 | |
647 | /* Register the specialization SPEC as a specialization of TMPL with | |
648 | the indicated ARGS. */ | |
649 | ||
650 | static void | |
651 | register_specialization (spec, tmpl, args) | |
652 | tree spec; | |
653 | tree tmpl; | |
654 | tree args; | |
655 | { | |
656 | tree s; | |
657 | ||
658 | my_friendly_assert (TREE_CODE (tmpl) == TEMPLATE_DECL, 0); | |
659 | ||
660 | if (TREE_CODE (spec) != TEMPLATE_DECL | |
661 | && list_length (DECL_TEMPLATE_PARMS (tmpl)) > 1) | |
662 | /* Avoid registering function declarations as | |
663 | specializations of member templates, as would otherwise | |
664 | happen with out-of-class specializations of member | |
665 | templates. */ | |
666 | return; | |
667 | ||
668 | for (s = DECL_TEMPLATE_SPECIALIZATIONS (tmpl); | |
669 | s != NULL_TREE; | |
670 | s = TREE_CHAIN (s)) | |
671 | if (comp_template_args (TREE_PURPOSE (s), args)) | |
672 | { | |
673 | tree fn = TREE_VALUE (s); | |
674 | ||
675 | if (DECL_TEMPLATE_SPECIALIZATION (spec)) | |
676 | { | |
677 | if (DECL_TEMPLATE_INSTANTIATION (fn)) | |
678 | { | |
679 | if (TREE_USED (fn) | |
680 | || DECL_EXPLICIT_INSTANTIATION (fn)) | |
681 | { | |
682 | cp_error ("specialization of %D after instantiation", | |
683 | fn); | |
684 | return; | |
685 | } | |
686 | else | |
687 | { | |
688 | /* This situation should occur only if the first | |
689 | specialization is an implicit instantiation, | |
690 | the second is an explicit specialization, and | |
691 | the implicit instantiation has not yet been | |
692 | used. That situation can occur if we have | |
693 | implicitly instantiated a member function of | |
694 | class type, and then specialized it later. */ | |
75650646 MM |
695 | TREE_VALUE (s) = spec; |
696 | return; | |
697 | } | |
698 | } | |
699 | else if (DECL_TEMPLATE_SPECIALIZATION (fn)) | |
700 | { | |
701 | if (DECL_INITIAL (fn)) | |
702 | cp_error ("duplicate specialization of %D", fn); | |
703 | ||
75650646 MM |
704 | TREE_VALUE (s) = spec; |
705 | return; | |
706 | } | |
707 | } | |
708 | } | |
709 | ||
710 | DECL_TEMPLATE_SPECIALIZATIONS (tmpl) | |
711 | = perm_tree_cons (args, spec, DECL_TEMPLATE_SPECIALIZATIONS (tmpl)); | |
712 | } | |
713 | ||
e1467ff2 MM |
714 | /* Print the list of candidate FNS in an error message. */ |
715 | ||
716 | static void | |
717 | print_candidates (fns) | |
718 | tree fns; | |
719 | { | |
720 | tree fn; | |
721 | ||
722 | char* str = "candidates are:"; | |
723 | ||
724 | for (fn = fns; fn != NULL_TREE; fn = TREE_CHAIN (fn)) | |
725 | { | |
726 | cp_error_at ("%s %+#D", str, TREE_VALUE (fn)); | |
727 | str = " "; | |
728 | } | |
729 | } | |
730 | ||
75650646 | 731 | /* Returns the template (one of the functions given by TEMPLATE_ID) |
e1467ff2 MM |
732 | which can be specialized to match the indicated DECL with the |
733 | explicit template args given in TEMPLATE_ID. If | |
734 | NEED_MEMBER_TEMPLATE is true the function is a specialization of a | |
735 | member template. The template args (those explicitly specified and | |
736 | those deduced) are output in a newly created vector *TARGS_OUT. If | |
737 | it is impossible to determine the result, an error message is | |
738 | issued, unless COMPLAIN is 0. The DECL may be NULL_TREE if none is | |
739 | available. */ | |
75650646 | 740 | |
386b8a85 | 741 | tree |
e1467ff2 | 742 | determine_specialization (template_id, decl, targs_out, |
75650646 MM |
743 | need_member_template, |
744 | complain) | |
386b8a85 | 745 | tree template_id; |
e1467ff2 | 746 | tree decl; |
386b8a85 JM |
747 | tree* targs_out; |
748 | int need_member_template; | |
749 | int complain; | |
750 | { | |
75650646 MM |
751 | tree fns = TREE_OPERAND (template_id, 0); |
752 | tree targs_in = TREE_OPERAND (template_id, 1); | |
e1467ff2 | 753 | tree templates = NULL_TREE; |
386b8a85 | 754 | tree fn; |
75650646 | 755 | int i; |
386b8a85 | 756 | |
e1467ff2 MM |
757 | *targs_out = NULL_TREE; |
758 | ||
27fafc8d JM |
759 | if (fns == error_mark_node) |
760 | return error_mark_node; | |
761 | ||
2c73f9f5 ML |
762 | /* Check for baselinks. */ |
763 | if (TREE_CODE (fns) == TREE_LIST) | |
764 | fns = TREE_VALUE (fns); | |
386b8a85 | 765 | |
2c73f9f5 | 766 | for (; fns; fns = OVL_NEXT (fns)) |
386b8a85 | 767 | { |
75650646 MM |
768 | tree tmpl; |
769 | ||
2c73f9f5 | 770 | fn = OVL_CURRENT (fns); |
75650646 MM |
771 | if (!need_member_template |
772 | && TREE_CODE (fn) == FUNCTION_DECL | |
e1467ff2 | 773 | && DECL_FUNCTION_MEMBER_P (fn) |
75650646 MM |
774 | && DECL_USE_TEMPLATE (fn) |
775 | && DECL_TI_TEMPLATE (fn)) | |
e1467ff2 MM |
776 | /* We can get here when processing something like: |
777 | template <class T> class X { void f(); } | |
778 | template <> void X<int>::f() {} | |
779 | We're specializing a member function, but not a member | |
780 | template. */ | |
75650646 MM |
781 | tmpl = DECL_TI_TEMPLATE (fn); |
782 | else if (TREE_CODE (fn) != TEMPLATE_DECL | |
e1467ff2 | 783 | || (need_member_template && !is_member_template (fn))) |
798eed5e | 784 | continue; |
75650646 MM |
785 | else |
786 | tmpl = fn; | |
386b8a85 | 787 | |
75650646 | 788 | if (list_length (targs_in) > DECL_NTPARMS (tmpl)) |
386b8a85 JM |
789 | continue; |
790 | ||
e1467ff2 | 791 | if (decl == NULL_TREE) |
386b8a85 | 792 | { |
e1467ff2 MM |
793 | tree targs = make_scratch_vec (DECL_NTPARMS (tmpl)); |
794 | ||
795 | /* We allow incomplete unification here, because we are going to | |
796 | check all the functions. */ | |
797 | i = type_unification (DECL_INNERMOST_TEMPLATE_PARMS (tmpl), | |
050367a3 | 798 | targs, |
e1467ff2 MM |
799 | NULL_TREE, |
800 | NULL_TREE, | |
801 | targs_in, | |
830bfa74 | 802 | DEDUCE_EXACT, 1); |
e1467ff2 MM |
803 | |
804 | if (i == 0) | |
805 | /* Unification was successful. */ | |
806 | templates = scratch_tree_cons (targs, tmpl, templates); | |
386b8a85 | 807 | } |
e1467ff2 MM |
808 | else |
809 | templates = scratch_tree_cons (NULL_TREE, tmpl, templates); | |
386b8a85 | 810 | } |
75650646 | 811 | |
e1467ff2 | 812 | if (decl != NULL_TREE) |
386b8a85 | 813 | { |
e1467ff2 MM |
814 | tree tmpl = most_specialized (templates, decl, targs_in); |
815 | ||
816 | if (tmpl == error_mark_node) | |
817 | goto ambiguous; | |
818 | else if (tmpl == NULL_TREE) | |
819 | goto no_match; | |
820 | ||
821 | *targs_out = get_bindings (tmpl, decl, targs_in); | |
822 | return tmpl; | |
823 | } | |
824 | ||
825 | if (templates == NULL_TREE) | |
826 | { | |
827 | no_match: | |
386b8a85 | 828 | if (complain) |
27fafc8d JM |
829 | { |
830 | cp_error_at ("template-id `%D' for `%+D' does not match any template declaration", | |
831 | template_id, decl); | |
832 | return error_mark_node; | |
833 | } | |
386b8a85 JM |
834 | return NULL_TREE; |
835 | } | |
e1467ff2 | 836 | else if (TREE_CHAIN (templates) != NULL_TREE) |
386b8a85 | 837 | { |
e1467ff2 | 838 | ambiguous: |
386b8a85 JM |
839 | if (complain) |
840 | { | |
27fafc8d JM |
841 | cp_error_at ("ambiguous template specialization `%D' for `%+D'", |
842 | template_id, decl); | |
e1467ff2 | 843 | print_candidates (templates); |
27fafc8d | 844 | return error_mark_node; |
386b8a85 | 845 | } |
386b8a85 JM |
846 | return NULL_TREE; |
847 | } | |
848 | ||
849 | /* We have one, and exactly one, match. */ | |
e1467ff2 MM |
850 | *targs_out = TREE_PURPOSE (templates); |
851 | return TREE_VALUE (templates); | |
8d08fdba | 852 | } |
6757edfe | 853 | |
386b8a85 | 854 | /* Check to see if the function just declared, as indicated in |
75650646 MM |
855 | DECLARATOR, and in DECL, is a specialization of a function |
856 | template. We may also discover that the declaration is an explicit | |
857 | instantiation at this point. | |
858 | ||
e1467ff2 MM |
859 | Returns DECL, or an equivalent declaration that should be used |
860 | instead. | |
75650646 | 861 | |
75650646 MM |
862 | FLAGS is a bitmask consisting of the following flags: |
863 | ||
864 | 1: We are being called by finish_struct. (We are unable to | |
865 | determine what template is specialized by an in-class | |
866 | declaration until the class definition is complete, so | |
867 | finish_struct_methods calls this function again later to finish | |
868 | the job.) | |
869 | 2: The function has a definition. | |
870 | 4: The function is a friend. | |
871 | 8: The function is known to be a specialization of a member | |
872 | template. | |
873 | ||
874 | The TEMPLATE_COUNT is the number of references to qualifying | |
875 | template classes that appeared in the name of the function. For | |
876 | example, in | |
877 | ||
878 | template <class T> struct S { void f(); }; | |
879 | void S<int>::f(); | |
880 | ||
881 | the TEMPLATE_COUNT would be 1. However, explicitly specialized | |
882 | classes are not counted in the TEMPLATE_COUNT, so that in | |
883 | ||
884 | template <class T> struct S {}; | |
885 | template <> struct S<int> { void f(); } | |
886 | template <> | |
887 | void S<int>::f(); | |
888 | ||
889 | the TEMPLATE_COUNT would be 0. (Note that this declaration is | |
890 | illegal; there should be no template <>.) | |
891 | ||
892 | If the function is a specialization, it is marked as such via | |
893 | DECL_TEMPLATE_SPECIALIZATION. Furthermore, its DECL_TEMPLATE_INFO | |
894 | is set up correctly, and it is added to the list of specializations | |
895 | for that template. */ | |
386b8a85 | 896 | |
e1467ff2 | 897 | tree |
27bb8339 | 898 | check_explicit_specialization (declarator, decl, template_count, flags) |
386b8a85 JM |
899 | tree declarator; |
900 | tree decl; | |
901 | int template_count; | |
902 | int flags; | |
903 | { | |
75650646 MM |
904 | int finish_member = flags & 1; |
905 | int have_def = flags & 2; | |
906 | int is_friend = flags & 4; | |
907 | int specialization = 0; | |
e1467ff2 | 908 | int explicit_instantiation = 0; |
75650646 MM |
909 | int member_specialization = flags & 8; |
910 | ||
911 | tree ctype = DECL_CLASS_CONTEXT (decl); | |
912 | tree dname = DECL_NAME (decl); | |
386b8a85 | 913 | |
75650646 | 914 | if (!finish_member) |
386b8a85 | 915 | { |
75650646 MM |
916 | if (processing_specialization) |
917 | { | |
918 | /* The last template header was of the form template <>. */ | |
919 | ||
920 | if (template_header_count > template_count) | |
921 | { | |
922 | /* There were more template headers than qualifying template | |
923 | classes. */ | |
924 | if (template_header_count - template_count > 1) | |
925 | /* There shouldn't be that many template parameter | |
926 | lists. There can be at most one parameter list for | |
927 | every qualifying class, plus one for the function | |
928 | itself. */ | |
929 | cp_error ("too many template parameter lists in declaration of `%D'", decl); | |
386b8a85 | 930 | |
75650646 MM |
931 | SET_DECL_TEMPLATE_SPECIALIZATION (decl); |
932 | if (ctype) | |
933 | member_specialization = 1; | |
934 | else | |
935 | specialization = 1; | |
936 | } | |
937 | else if (template_header_count == template_count) | |
938 | { | |
939 | /* The counts are equal. So, this might be a | |
940 | specialization, but it is not a specialization of a | |
941 | member template. It might be something like | |
942 | ||
943 | template <class T> struct S { | |
944 | void f(int i); | |
945 | }; | |
946 | template <> | |
947 | void S<int>::f(int i) {} */ | |
948 | specialization = 1; | |
949 | SET_DECL_TEMPLATE_SPECIALIZATION (decl); | |
950 | } | |
951 | else | |
952 | { | |
953 | /* This cannot be an explicit specialization. There are not | |
954 | enough headers for all of the qualifying classes. For | |
955 | example, we might have: | |
956 | ||
957 | template <> | |
958 | void S<int>::T<char>::f(); | |
959 | ||
960 | But, we're missing another template <>. */ | |
961 | cp_error("too few template parameter lists in declaration of `%D'", decl); | |
e1467ff2 | 962 | return decl; |
75650646 MM |
963 | } |
964 | } | |
965 | else if (processing_explicit_instantiation) | |
966 | { | |
967 | if (template_header_count) | |
968 | cp_error ("template parameter list used in explicit instantiation"); | |
969 | ||
970 | if (have_def) | |
971 | cp_error ("definition provided for explicit instantiation"); | |
386b8a85 | 972 | |
e1467ff2 | 973 | explicit_instantiation = 1; |
75650646 | 974 | } |
c6f2ed0d JM |
975 | else if (ctype != NULL_TREE |
976 | && !TYPE_BEING_DEFINED (ctype) | |
977 | && CLASSTYPE_TEMPLATE_INSTANTIATION (ctype)) | |
386b8a85 | 978 | { |
c6f2ed0d | 979 | /* This case catches outdated code that looks like this: |
75650646 | 980 | |
c6f2ed0d | 981 | template <class T> struct S { void f(); }; |
75650646 MM |
982 | void S<int>::f() {} // Missing template <> |
983 | ||
984 | We disable this check when the type is being defined to | |
985 | avoid complaining about default compiler-generated | |
986 | constructors, destructors, and assignment operators. | |
987 | Since the type is an instantiation, not a specialization, | |
988 | these are the only functions that can be defined before | |
c6f2ed0d | 989 | the class is complete. */ |
75650646 | 990 | |
c6f2ed0d JM |
991 | /* If they said |
992 | template <class T> void S<int>::f() {} | |
993 | that's bogus. */ | |
994 | if (template_header_count) | |
995 | { | |
996 | cp_error ("template parameters specified in specialization"); | |
997 | return decl; | |
998 | } | |
999 | ||
1000 | if (pedantic) | |
1001 | cp_pedwarn | |
1002 | ("explicit specialization not preceded by `template <>'"); | |
1003 | specialization = 1; | |
1004 | SET_DECL_TEMPLATE_SPECIALIZATION (decl); | |
1005 | } | |
1006 | else if (TREE_CODE (declarator) == TEMPLATE_ID_EXPR) | |
1007 | { | |
1008 | /* This case handles bogus declarations like | |
75650646 MM |
1009 | template <> template <class T> |
1010 | void f<int>(); */ | |
1011 | ||
c6f2ed0d JM |
1012 | cp_error ("template-id `%D' in declaration of primary template", |
1013 | declarator); | |
e1467ff2 | 1014 | return decl; |
386b8a85 | 1015 | } |
75650646 | 1016 | } |
386b8a85 | 1017 | |
670960ac JM |
1018 | if (specialization || member_specialization) |
1019 | { | |
1020 | tree t = TYPE_ARG_TYPES (TREE_TYPE (decl)); | |
1021 | for (; t; t = TREE_CHAIN (t)) | |
1022 | if (TREE_PURPOSE (t)) | |
1023 | { | |
1024 | cp_pedwarn | |
1025 | ("default argument specified in explicit specialization"); | |
1026 | break; | |
1027 | } | |
1028 | } | |
1029 | ||
e1467ff2 | 1030 | if (specialization || member_specialization || explicit_instantiation) |
75650646 MM |
1031 | { |
1032 | tree tmpl = NULL_TREE; | |
1033 | tree targs = NULL_TREE; | |
75650646 MM |
1034 | |
1035 | /* Make sure that the declarator is a TEMPLATE_ID_EXPR. */ | |
386b8a85 JM |
1036 | if (TREE_CODE (declarator) != TEMPLATE_ID_EXPR) |
1037 | { | |
1038 | tree fns; | |
1039 | ||
1040 | my_friendly_assert (TREE_CODE (declarator) == IDENTIFIER_NODE, | |
1041 | 0); | |
1042 | if (!ctype) | |
30394414 | 1043 | fns = IDENTIFIER_NAMESPACE_VALUE (dname); |
386b8a85 JM |
1044 | else |
1045 | fns = dname; | |
1046 | ||
75650646 MM |
1047 | declarator = |
1048 | lookup_template_function (fns, NULL_TREE); | |
386b8a85 JM |
1049 | } |
1050 | ||
1051 | if (TREE_CODE (TREE_OPERAND (declarator, 0)) == LOOKUP_EXPR) | |
1052 | { | |
1053 | /* A friend declaration. We can't do much, because we don't | |
1054 | know what this resolves to, yet. */ | |
1055 | my_friendly_assert (is_friend != 0, 0); | |
e1467ff2 | 1056 | my_friendly_assert (!explicit_instantiation, 0); |
386b8a85 | 1057 | SET_DECL_IMPLICIT_INSTANTIATION (decl); |
e1467ff2 | 1058 | return decl; |
386b8a85 JM |
1059 | } |
1060 | ||
75650646 MM |
1061 | if (ctype != NULL_TREE && TYPE_BEING_DEFINED (ctype)) |
1062 | { | |
1063 | /* Since finish_struct_1 has not been called yet, we | |
1064 | can't call lookup_fnfields. We note that this | |
1065 | template is a specialization, and proceed, letting | |
1066 | finish_struct fix this up later. */ | |
e1467ff2 MM |
1067 | tree ti = perm_tree_cons (NULL_TREE, |
1068 | TREE_OPERAND (declarator, 1), | |
1069 | NULL_TREE); | |
1070 | TI_PENDING_SPECIALIZATION_FLAG (ti) = 1; | |
1071 | DECL_TEMPLATE_INFO (decl) = ti; | |
1072 | /* This should not be an instantiation; explicit | |
1073 | instantiation directives can only occur at the top | |
1074 | level. */ | |
1075 | my_friendly_assert (!explicit_instantiation, 0); | |
1076 | return decl; | |
75650646 MM |
1077 | } |
1078 | else if (ctype != NULL_TREE | |
1079 | && (TREE_CODE (TREE_OPERAND (declarator, 0)) == | |
1080 | IDENTIFIER_NODE)) | |
386b8a85 | 1081 | { |
75650646 MM |
1082 | /* Find the list of functions in ctype that have the same |
1083 | name as the declared function. */ | |
1084 | tree name = TREE_OPERAND (declarator, 0); | |
386b8a85 | 1085 | tree fns; |
75650646 MM |
1086 | |
1087 | if (name == constructor_name (ctype) | |
1088 | || name == constructor_name_full (ctype)) | |
386b8a85 | 1089 | { |
75650646 MM |
1090 | int is_constructor = DECL_CONSTRUCTOR_P (decl); |
1091 | ||
1092 | if (is_constructor ? !TYPE_HAS_CONSTRUCTOR (ctype) | |
1093 | : !TYPE_HAS_DESTRUCTOR (ctype)) | |
1094 | { | |
1095 | /* From [temp.expl.spec]: | |
e1467ff2 | 1096 | |
75650646 MM |
1097 | If such an explicit specialization for the member |
1098 | of a class template names an implicitly-declared | |
1099 | special member function (clause _special_), the | |
e1467ff2 MM |
1100 | program is ill-formed. |
1101 | ||
1102 | Similar language is found in [temp.explicit]. */ | |
75650646 MM |
1103 | cp_error ("specialization of implicitly-declared special member function"); |
1104 | ||
e1467ff2 | 1105 | return decl; |
75650646 | 1106 | } |
386b8a85 | 1107 | |
42da2fd8 | 1108 | name = is_constructor ? ctor_identifier : dtor_identifier; |
75650646 | 1109 | } |
42da2fd8 MM |
1110 | |
1111 | fns = lookup_fnfields (TYPE_BINFO (ctype), name, 1); | |
386b8a85 JM |
1112 | |
1113 | if (fns == NULL_TREE) | |
1114 | { | |
75650646 MM |
1115 | cp_error ("no member function `%s' declared in `%T'", |
1116 | IDENTIFIER_POINTER (name), | |
386b8a85 | 1117 | ctype); |
e1467ff2 | 1118 | return decl; |
386b8a85 JM |
1119 | } |
1120 | else | |
1121 | TREE_OPERAND (declarator, 0) = fns; | |
1122 | } | |
75650646 | 1123 | |
e1467ff2 MM |
1124 | /* Figure out what exactly is being specialized at this point. |
1125 | Note that for an explicit instantiation, even one for a | |
38e01259 | 1126 | member function, we cannot tell apriori whether the |
e1467ff2 MM |
1127 | instantiation is for a member template, or just a member |
1128 | function of a template class. In particular, even in if the | |
1129 | instantiation is for a member template, the template | |
1130 | arguments could be deduced from the declaration. */ | |
1131 | tmpl = determine_specialization (declarator, decl, | |
1132 | &targs, | |
75650646 MM |
1133 | member_specialization, |
1134 | 1); | |
386b8a85 | 1135 | |
82a7448c | 1136 | if (tmpl && tmpl != error_mark_node) |
386b8a85 | 1137 | { |
e1467ff2 MM |
1138 | if (explicit_instantiation) |
1139 | { | |
1140 | decl = instantiate_template (tmpl, targs); | |
1141 | if (!DECL_TEMPLATE_SPECIALIZATION (decl)) | |
1142 | /* There doesn't seem to be anything in the draft to | |
1143 | prevent a specialization from being explicitly | |
1144 | instantiated. We're careful not to destroy the | |
1145 | information indicating that this is a | |
1146 | specialization here. */ | |
1147 | SET_DECL_EXPLICIT_INSTANTIATION (decl); | |
1148 | return decl; | |
1149 | } | |
8857f91e MM |
1150 | else if (DECL_STATIC_FUNCTION_P (tmpl) |
1151 | && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)) | |
366c0f1e MM |
1152 | { |
1153 | revert_static_member_fn (&decl, 0, 0); | |
1154 | last_function_parms = TREE_CHAIN (last_function_parms); | |
1155 | } | |
e1467ff2 MM |
1156 | |
1157 | /* Mangle the function name appropriately. Note that we do | |
1158 | not mangle specializations of non-template member | |
1159 | functions of template classes, e.g. with | |
1160 | template <class T> struct S { void f(); } | |
1161 | and given the specialization | |
1162 | template <> void S<int>::f() {} | |
1163 | we do not mangle S<int>::f() here. That's because it's | |
1164 | just an ordinary member function and doesn't need special | |
1165 | treatment. */ | |
1166 | if ((is_member_template (tmpl) || ctype == NULL_TREE) | |
75650646 | 1167 | && name_mangling_version >= 1) |
386b8a85 JM |
1168 | { |
1169 | tree arg_types = TYPE_ARG_TYPES (TREE_TYPE (tmpl)); | |
1170 | ||
1171 | if (ctype | |
1172 | && TREE_CODE (TREE_TYPE (tmpl)) == FUNCTION_TYPE) | |
1173 | arg_types = | |
1174 | hash_tree_chain (build_pointer_type (ctype), | |
1175 | arg_types); | |
1176 | ||
1177 | DECL_ASSEMBLER_NAME (decl) | |
1178 | = build_template_decl_overload | |
1179 | (DECL_NAME (decl), | |
1180 | arg_types, | |
1181 | TREE_TYPE (TREE_TYPE (tmpl)), | |
1182 | DECL_INNERMOST_TEMPLATE_PARMS (tmpl), | |
1183 | targs, ctype != NULL_TREE); | |
1184 | } | |
1185 | ||
1186 | if (is_friend && !have_def) | |
1187 | { | |
1188 | /* This is not really a declaration of a specialization. | |
1189 | It's just the name of an instantiation. But, it's not | |
1190 | a request for an instantiation, either. */ | |
1191 | SET_DECL_IMPLICIT_INSTANTIATION (decl); | |
1192 | DECL_TEMPLATE_INFO (decl) | |
1193 | = perm_tree_cons (tmpl, targs, NULL_TREE); | |
e1467ff2 | 1194 | return decl; |
386b8a85 JM |
1195 | } |
1196 | ||
386b8a85 JM |
1197 | /* If DECL_TI_TEMPLATE (decl), the decl is an |
1198 | instantiation of a specialization of a member template. | |
1199 | (In other words, there was a member template, in a | |
1200 | class template. That member template was specialized. | |
1201 | We then instantiated the class, so there is now an | |
1202 | instance of that specialization.) | |
1203 | ||
1204 | According to the CD2, | |
1205 | ||
1206 | 14.7.3.13 [tmpl.expl.spec] | |
1207 | ||
1208 | A specialization of a member function template or | |
1209 | member class template of a non-specialized class | |
1210 | template is itself a template. | |
1211 | ||
7ac63bca | 1212 | So, we just leave the template info alone in this case. */ |
386b8a85 JM |
1213 | if (!(DECL_TEMPLATE_INFO (decl) && DECL_TI_TEMPLATE (decl))) |
1214 | DECL_TEMPLATE_INFO (decl) | |
1215 | = perm_tree_cons (tmpl, targs, NULL_TREE); | |
75650646 MM |
1216 | |
1217 | register_specialization (decl, tmpl, targs); | |
1218 | ||
e1467ff2 | 1219 | return decl; |
386b8a85 JM |
1220 | } |
1221 | } | |
75650646 | 1222 | |
e1467ff2 | 1223 | return decl; |
386b8a85 | 1224 | } |
75650646 | 1225 | |
75650646 MM |
1226 | /* Returns 1 iff PARMS1 and PARMS2 are identical sets of template |
1227 | parameters. These are represented in the same format used for | |
1228 | DECL_TEMPLATE_PARMS. */ | |
1229 | ||
1230 | int comp_template_parms (parms1, parms2) | |
1231 | tree parms1; | |
1232 | tree parms2; | |
1233 | { | |
1234 | tree p1; | |
1235 | tree p2; | |
1236 | ||
1237 | if (parms1 == parms2) | |
1238 | return 1; | |
1239 | ||
1240 | for (p1 = parms1, p2 = parms2; | |
1241 | p1 != NULL_TREE && p2 != NULL_TREE; | |
1242 | p1 = TREE_CHAIN (p1), p2 = TREE_CHAIN (p2)) | |
1243 | { | |
1244 | tree t1 = TREE_VALUE (p1); | |
1245 | tree t2 = TREE_VALUE (p2); | |
1246 | int i; | |
1247 | ||
1248 | my_friendly_assert (TREE_CODE (t1) == TREE_VEC, 0); | |
1249 | my_friendly_assert (TREE_CODE (t2) == TREE_VEC, 0); | |
1250 | ||
1251 | if (TREE_VEC_LENGTH (t1) != TREE_VEC_LENGTH (t2)) | |
1252 | return 0; | |
1253 | ||
1254 | for (i = 0; i < TREE_VEC_LENGTH (t2); ++i) | |
1255 | { | |
1256 | tree parm1 = TREE_VALUE (TREE_VEC_ELT (t1, i)); | |
1257 | tree parm2 = TREE_VALUE (TREE_VEC_ELT (t2, i)); | |
1258 | ||
1259 | if (TREE_CODE (parm1) != TREE_CODE (parm2)) | |
1260 | return 0; | |
1261 | ||
1262 | if (TREE_CODE (parm1) == TEMPLATE_TYPE_PARM) | |
1263 | continue; | |
1264 | else if (!comptypes (TREE_TYPE (parm1), | |
1265 | TREE_TYPE (parm2), 1)) | |
1266 | return 0; | |
1267 | } | |
1268 | } | |
1269 | ||
1270 | if ((p1 != NULL_TREE) != (p2 != NULL_TREE)) | |
1271 | /* One set of parameters has more parameters lists than the | |
1272 | other. */ | |
1273 | return 0; | |
1274 | ||
1275 | return 1; | |
1276 | } | |
1277 | ||
f84b4be9 JM |
1278 | /* Return a new TEMPLATE_PARM_INDEX with the indicated INDEX, LEVEL, |
1279 | ORIG_LEVEL, DECL, and TYPE. */ | |
1280 | ||
1281 | static tree | |
1282 | build_template_parm_index (index, level, orig_level, decl, type) | |
1283 | int index; | |
1284 | int level; | |
1285 | int orig_level; | |
1286 | tree decl; | |
1287 | tree type; | |
1288 | { | |
1289 | tree t = make_node (TEMPLATE_PARM_INDEX); | |
1290 | TEMPLATE_PARM_IDX (t) = index; | |
1291 | TEMPLATE_PARM_LEVEL (t) = level; | |
1292 | TEMPLATE_PARM_ORIG_LEVEL (t) = orig_level; | |
1293 | TEMPLATE_PARM_DECL (t) = decl; | |
1294 | TREE_TYPE (t) = type; | |
1295 | ||
1296 | return t; | |
1297 | } | |
1298 | ||
f84b4be9 | 1299 | /* Return a TEMPLATE_PARM_INDEX, similar to INDEX, but whose |
93cdc044 | 1300 | TEMPLATE_PARM_LEVEL has been decreased by LEVELS. If such a |
f84b4be9 JM |
1301 | TEMPLATE_PARM_INDEX already exists, it is returned; otherwise, a |
1302 | new one is created. */ | |
1303 | ||
1304 | static tree | |
93cdc044 | 1305 | reduce_template_parm_level (index, type, levels) |
f84b4be9 JM |
1306 | tree index; |
1307 | tree type; | |
93cdc044 | 1308 | int levels; |
f84b4be9 JM |
1309 | { |
1310 | if (TEMPLATE_PARM_DESCENDANTS (index) == NULL_TREE | |
1311 | || (TEMPLATE_PARM_LEVEL (TEMPLATE_PARM_DESCENDANTS (index)) | |
93cdc044 | 1312 | != TEMPLATE_PARM_LEVEL (index) - levels)) |
f84b4be9 JM |
1313 | { |
1314 | tree decl | |
1315 | = build_decl (TREE_CODE (TEMPLATE_PARM_DECL (index)), | |
1316 | DECL_NAME (TEMPLATE_PARM_DECL (index)), | |
1317 | type); | |
1318 | tree t | |
1319 | = build_template_parm_index (TEMPLATE_PARM_IDX (index), | |
93cdc044 | 1320 | TEMPLATE_PARM_LEVEL (index) - levels, |
f84b4be9 JM |
1321 | TEMPLATE_PARM_ORIG_LEVEL (index), |
1322 | decl, type); | |
1323 | TEMPLATE_PARM_DESCENDANTS (index) = t; | |
cae40af6 JM |
1324 | |
1325 | /* Template template parameters need this. */ | |
1326 | DECL_TEMPLATE_PARMS (decl) | |
1327 | = DECL_TEMPLATE_PARMS (TEMPLATE_PARM_DECL (index)); | |
f84b4be9 JM |
1328 | } |
1329 | ||
1330 | return TEMPLATE_PARM_DESCENDANTS (index); | |
1331 | } | |
1332 | ||
8d08fdba | 1333 | /* Process information from new template parameter NEXT and append it to the |
5566b478 | 1334 | LIST being built. */ |
e92cc029 | 1335 | |
8d08fdba MS |
1336 | tree |
1337 | process_template_parm (list, next) | |
1338 | tree list, next; | |
1339 | { | |
1340 | tree parm; | |
1341 | tree decl = 0; | |
a292b002 | 1342 | tree defval; |
5566b478 | 1343 | int is_type, idx; |
f84b4be9 | 1344 | |
8d08fdba MS |
1345 | parm = next; |
1346 | my_friendly_assert (TREE_CODE (parm) == TREE_LIST, 259); | |
a292b002 MS |
1347 | defval = TREE_PURPOSE (parm); |
1348 | parm = TREE_VALUE (parm); | |
1349 | is_type = TREE_PURPOSE (parm) == class_type_node; | |
5566b478 MS |
1350 | |
1351 | if (list) | |
1352 | { | |
1353 | tree p = TREE_VALUE (tree_last (list)); | |
1354 | ||
1355 | if (TREE_CODE (p) == TYPE_DECL) | |
1356 | idx = TEMPLATE_TYPE_IDX (TREE_TYPE (p)); | |
73b0fce8 KL |
1357 | else if (TREE_CODE (p) == TEMPLATE_DECL) |
1358 | idx = TEMPLATE_TYPE_IDX (TREE_TYPE (DECL_TEMPLATE_RESULT (p))); | |
5566b478 | 1359 | else |
f84b4be9 | 1360 | idx = TEMPLATE_PARM_IDX (DECL_INITIAL (p)); |
5566b478 MS |
1361 | ++idx; |
1362 | } | |
1363 | else | |
1364 | idx = 0; | |
1365 | ||
8d08fdba MS |
1366 | if (!is_type) |
1367 | { | |
a292b002 | 1368 | my_friendly_assert (TREE_CODE (TREE_PURPOSE (parm)) == TREE_LIST, 260); |
8d08fdba | 1369 | /* is a const-param */ |
a292b002 | 1370 | parm = grokdeclarator (TREE_VALUE (parm), TREE_PURPOSE (parm), |
c11b6f21 | 1371 | PARM, 0, NULL_TREE); |
8d08fdba MS |
1372 | /* A template parameter is not modifiable. */ |
1373 | TREE_READONLY (parm) = 1; | |
c91a56d2 MS |
1374 | if (IS_AGGR_TYPE (TREE_TYPE (parm)) |
1375 | && TREE_CODE (TREE_TYPE (parm)) != TEMPLATE_TYPE_PARM) | |
8d08fdba | 1376 | { |
c91a56d2 MS |
1377 | cp_error ("`%#T' is not a valid type for a template constant parameter", |
1378 | TREE_TYPE (parm)); | |
1379 | if (DECL_NAME (parm) == NULL_TREE) | |
1380 | error (" a template type parameter must begin with `class' or `typename'"); | |
8d08fdba MS |
1381 | TREE_TYPE (parm) = void_type_node; |
1382 | } | |
37c46b43 MS |
1383 | else if (pedantic |
1384 | && (TREE_CODE (TREE_TYPE (parm)) == REAL_TYPE | |
1385 | || TREE_CODE (TREE_TYPE (parm)) == COMPLEX_TYPE)) | |
eb66be0e MS |
1386 | cp_pedwarn ("`%T' is not a valid type for a template constant parameter", |
1387 | TREE_TYPE (parm)); | |
8d08fdba MS |
1388 | if (TREE_PERMANENT (parm) == 0) |
1389 | { | |
1390 | parm = copy_node (parm); | |
1391 | TREE_PERMANENT (parm) = 1; | |
1392 | } | |
8d08fdba | 1393 | decl = build_decl (CONST_DECL, DECL_NAME (parm), TREE_TYPE (parm)); |
f84b4be9 JM |
1394 | DECL_INITIAL (parm) = DECL_INITIAL (decl) |
1395 | = build_template_parm_index (idx, processing_template_decl, | |
1396 | processing_template_decl, | |
1397 | decl, TREE_TYPE (parm)); | |
8d08fdba MS |
1398 | } |
1399 | else | |
1400 | { | |
73b0fce8 KL |
1401 | tree t; |
1402 | parm = TREE_VALUE (parm); | |
1403 | ||
1404 | if (parm && TREE_CODE (parm) == TEMPLATE_DECL) | |
1405 | { | |
1406 | t = make_lang_type (TEMPLATE_TEMPLATE_PARM); | |
1407 | /* This is for distinguishing between real templates and template | |
1408 | template parameters */ | |
1409 | TREE_TYPE (parm) = t; | |
1410 | TREE_TYPE (DECL_TEMPLATE_RESULT (parm)) = t; | |
1411 | decl = parm; | |
1412 | } | |
1413 | else | |
1414 | { | |
1415 | t = make_lang_type (TEMPLATE_TYPE_PARM); | |
1416 | /* parm is either IDENTIFIER_NODE or NULL_TREE */ | |
1417 | decl = build_decl (TYPE_DECL, parm, t); | |
1418 | } | |
1419 | ||
5566b478 | 1420 | CLASSTYPE_GOT_SEMICOLON (t) = 1; |
d2e5ee5c MS |
1421 | TYPE_NAME (t) = decl; |
1422 | TYPE_STUB_DECL (t) = decl; | |
a292b002 | 1423 | parm = decl; |
f84b4be9 JM |
1424 | TEMPLATE_TYPE_PARM_INDEX (t) |
1425 | = build_template_parm_index (idx, processing_template_decl, | |
1426 | processing_template_decl, | |
1427 | decl, TREE_TYPE (parm)); | |
8d08fdba | 1428 | } |
8ccc31eb | 1429 | SET_DECL_ARTIFICIAL (decl); |
8d08fdba | 1430 | pushdecl (decl); |
a292b002 | 1431 | parm = build_tree_list (defval, parm); |
8d08fdba MS |
1432 | return chainon (list, parm); |
1433 | } | |
1434 | ||
1435 | /* The end of a template parameter list has been reached. Process the | |
1436 | tree list into a parameter vector, converting each parameter into a more | |
1437 | useful form. Type parameters are saved as IDENTIFIER_NODEs, and others | |
1438 | as PARM_DECLs. */ | |
1439 | ||
1440 | tree | |
1441 | end_template_parm_list (parms) | |
1442 | tree parms; | |
1443 | { | |
5566b478 | 1444 | int nparms; |
8d08fdba | 1445 | tree parm; |
5566b478 MS |
1446 | tree saved_parmlist = make_tree_vec (list_length (parms)); |
1447 | ||
5566b478 MS |
1448 | current_template_parms |
1449 | = tree_cons (build_int_2 (0, processing_template_decl), | |
1450 | saved_parmlist, current_template_parms); | |
8d08fdba MS |
1451 | |
1452 | for (parm = parms, nparms = 0; parm; parm = TREE_CHAIN (parm), nparms++) | |
5566b478 | 1453 | TREE_VEC_ELT (saved_parmlist, nparms) = parm; |
a292b002 | 1454 | |
8d08fdba MS |
1455 | return saved_parmlist; |
1456 | } | |
1457 | ||
5566b478 MS |
1458 | /* end_template_decl is called after a template declaration is seen. */ |
1459 | ||
8d08fdba | 1460 | void |
5566b478 | 1461 | end_template_decl () |
8d08fdba | 1462 | { |
386b8a85 JM |
1463 | reset_specialization (); |
1464 | ||
5156628f | 1465 | if (! processing_template_decl) |
73aad9b9 JM |
1466 | return; |
1467 | ||
5566b478 MS |
1468 | /* This matches the pushlevel in begin_template_parm_list. */ |
1469 | poplevel (0, 0, 0); | |
8d08fdba | 1470 | |
5566b478 MS |
1471 | --processing_template_decl; |
1472 | current_template_parms = TREE_CHAIN (current_template_parms); | |
1473 | (void) get_pending_sizes (); /* Why? */ | |
1474 | } | |
8d08fdba | 1475 | |
9a3b49ac MS |
1476 | /* Generate a valid set of template args from current_template_parms. */ |
1477 | ||
1478 | tree | |
1479 | current_template_args () | |
5566b478 MS |
1480 | { |
1481 | tree header = current_template_parms; | |
98c1c668 JM |
1482 | int length = list_length (header); |
1483 | tree args = make_tree_vec (length); | |
1484 | int l = length; | |
1485 | ||
5566b478 | 1486 | while (header) |
8d08fdba | 1487 | { |
5566b478 MS |
1488 | tree a = copy_node (TREE_VALUE (header)); |
1489 | int i = TREE_VEC_LENGTH (a); | |
1490 | TREE_TYPE (a) = NULL_TREE; | |
1491 | while (i--) | |
1492 | { | |
98c1c668 JM |
1493 | tree t = TREE_VEC_ELT (a, i); |
1494 | ||
1495 | /* t will be a list if we are called from within a | |
1496 | begin/end_template_parm_list pair, but a vector directly | |
1497 | if within a begin/end_member_template_processing pair. */ | |
1498 | if (TREE_CODE (t) == TREE_LIST) | |
1499 | { | |
1500 | t = TREE_VALUE (t); | |
1501 | ||
73b0fce8 KL |
1502 | if (TREE_CODE (t) == TYPE_DECL |
1503 | || TREE_CODE (t) == TEMPLATE_DECL) | |
98c1c668 JM |
1504 | t = TREE_TYPE (t); |
1505 | else | |
1506 | t = DECL_INITIAL (t); | |
1507 | } | |
1508 | ||
5566b478 MS |
1509 | TREE_VEC_ELT (a, i) = t; |
1510 | } | |
98c1c668 | 1511 | TREE_VEC_ELT (args, --l) = a; |
5566b478 | 1512 | header = TREE_CHAIN (header); |
8d08fdba MS |
1513 | } |
1514 | ||
9a3b49ac MS |
1515 | return args; |
1516 | } | |
75650646 | 1517 | |
e1467ff2 MM |
1518 | |
1519 | /* Return a TEMPLATE_DECL corresponding to DECL, using the indicated | |
1520 | template PARMS. Used by push_template_decl below. */ | |
1521 | ||
75650646 MM |
1522 | static tree |
1523 | build_template_decl (decl, parms) | |
1524 | tree decl; | |
1525 | tree parms; | |
1526 | { | |
1527 | tree tmpl = build_lang_decl (TEMPLATE_DECL, DECL_NAME (decl), NULL_TREE); | |
1528 | DECL_TEMPLATE_PARMS (tmpl) = parms; | |
1529 | DECL_CONTEXT (tmpl) = DECL_CONTEXT (decl); | |
1530 | if (DECL_LANG_SPECIFIC (decl)) | |
1531 | { | |
1532 | DECL_CLASS_CONTEXT (tmpl) = DECL_CLASS_CONTEXT (decl); | |
1533 | DECL_STATIC_FUNCTION_P (tmpl) = | |
1534 | DECL_STATIC_FUNCTION_P (decl); | |
1535 | } | |
1536 | ||
1537 | return tmpl; | |
1538 | } | |
1539 | ||
050367a3 MM |
1540 | struct template_parm_data |
1541 | { | |
1542 | int level; | |
1543 | int* parms; | |
1544 | }; | |
1545 | ||
1546 | /* Subroutine of push_template_decl used to see if each template | |
1547 | parameter in a partial specialization is used in the explicit | |
1548 | argument list. If T is of the LEVEL given in DATA (which is | |
1549 | treated as a template_parm_data*), then DATA->PARMS is marked | |
1550 | appropriately. */ | |
1551 | ||
1552 | static int | |
1553 | mark_template_parm (t, data) | |
1554 | tree t; | |
1555 | void* data; | |
1556 | { | |
1557 | int level; | |
1558 | int idx; | |
1559 | struct template_parm_data* tpd = (struct template_parm_data*) data; | |
1560 | ||
1561 | if (TREE_CODE (t) == TEMPLATE_PARM_INDEX) | |
1562 | { | |
1563 | level = TEMPLATE_PARM_LEVEL (t); | |
1564 | idx = TEMPLATE_PARM_IDX (t); | |
1565 | } | |
1566 | else | |
1567 | { | |
1568 | level = TEMPLATE_TYPE_LEVEL (t); | |
1569 | idx = TEMPLATE_TYPE_IDX (t); | |
1570 | } | |
1571 | ||
1572 | if (level == tpd->level) | |
1573 | tpd->parms[idx] = 1; | |
1574 | ||
1575 | /* Return zero so that for_each_template_parm will continue the | |
1576 | traversal of the tree; we want to mark *every* template parm. */ | |
1577 | return 0; | |
1578 | } | |
1579 | ||
3ac3d9ea | 1580 | /* Creates a TEMPLATE_DECL for the indicated DECL using the template |
f84b4be9 JM |
1581 | parameters given by current_template_args, or reuses a |
1582 | previously existing one, if appropriate. Returns the DECL, or an | |
6757edfe MM |
1583 | equivalent one, if it is replaced via a call to duplicate_decls. |
1584 | ||
1585 | If IS_FRIEND is non-zero, DECL is a friend declaration. */ | |
3ac3d9ea MM |
1586 | |
1587 | tree | |
6757edfe | 1588 | push_template_decl_real (decl, is_friend) |
9a3b49ac | 1589 | tree decl; |
6757edfe | 1590 | int is_friend; |
9a3b49ac MS |
1591 | { |
1592 | tree tmpl; | |
f84b4be9 | 1593 | tree args; |
9a3b49ac | 1594 | tree info; |
f84b4be9 JM |
1595 | tree ctx; |
1596 | int primary; | |
6757edfe MM |
1597 | |
1598 | is_friend |= (TREE_CODE (decl) == FUNCTION_DECL && DECL_FRIEND_P (decl)); | |
f84b4be9 JM |
1599 | |
1600 | if (is_friend) | |
1601 | /* For a friend, we want the context of the friend function, not | |
1602 | the type of which it is a friend. */ | |
1603 | ctx = DECL_CONTEXT (decl); | |
2c73f9f5 ML |
1604 | else if (DECL_REAL_CONTEXT (decl) |
1605 | && TREE_CODE (DECL_REAL_CONTEXT (decl)) != NAMESPACE_DECL) | |
f84b4be9 JM |
1606 | /* In the case of a virtual function, we want the class in which |
1607 | it is defined. */ | |
1608 | ctx = DECL_REAL_CONTEXT (decl); | |
1609 | else | |
1610 | /* Otherwise, if we're currently definining some class, the DECL | |
1611 | is assumed to be a member of the class. */ | |
1612 | ctx = current_class_type; | |
1613 | ||
2c73f9f5 ML |
1614 | if (ctx && TREE_CODE (ctx) == NAMESPACE_DECL) |
1615 | ctx = NULL_TREE; | |
1616 | ||
1617 | if (!DECL_CONTEXT (decl)) | |
1618 | DECL_CONTEXT (decl) = current_namespace; | |
1619 | ||
93cdc044 JM |
1620 | /* For determining whether this is a primary template or not, we're really |
1621 | interested in the lexical context, not the true context. */ | |
1622 | if (is_friend) | |
6757edfe MM |
1623 | /* For a TYPE_DECL, there is no DECL_CLASS_CONTEXT. */ |
1624 | info = TREE_CODE (decl) == FUNCTION_DECL | |
1625 | ? DECL_CLASS_CONTEXT (decl) : current_class_type; | |
93cdc044 JM |
1626 | else |
1627 | info = ctx; | |
1628 | ||
1629 | if (info && TREE_CODE (info) == FUNCTION_DECL) | |
1630 | primary = 0; | |
6757edfe MM |
1631 | /* Note that template_class_depth returns 0 if given NULL_TREE, so |
1632 | this next line works even when we are at global scope. */ | |
1633 | else if (processing_template_decl > template_class_depth (info)) | |
9a3b49ac | 1634 | primary = 1; |
f84b4be9 JM |
1635 | else |
1636 | primary = 0; | |
9a3b49ac | 1637 | |
83566abf JM |
1638 | if (primary) |
1639 | { | |
1640 | if (current_lang_name == lang_name_c) | |
1641 | cp_error ("template with C linkage"); | |
1642 | if (TREE_CODE (decl) == TYPE_DECL && ANON_AGGRNAME_P (DECL_NAME (decl))) | |
1643 | cp_error ("template class without a name"); | |
1644 | } | |
1645 | ||
73aad9b9 | 1646 | /* Partial specialization. */ |
824b9a4c | 1647 | if (TREE_CODE (decl) == TYPE_DECL && DECL_ARTIFICIAL (decl) |
73aad9b9 JM |
1648 | && CLASSTYPE_TEMPLATE_SPECIALIZATION (TREE_TYPE (decl))) |
1649 | { | |
1650 | tree type = TREE_TYPE (decl); | |
1651 | tree maintmpl = CLASSTYPE_TI_TEMPLATE (type); | |
1652 | tree mainargs = CLASSTYPE_TI_ARGS (type); | |
1653 | tree spec = DECL_TEMPLATE_SPECIALIZATIONS (maintmpl); | |
1654 | ||
050367a3 MM |
1655 | /* We check that each of the template parameters given in the |
1656 | partial specialization is used in the argument list to the | |
1657 | specialization. For example: | |
1658 | ||
1659 | template <class T> struct S; | |
1660 | template <class T> struct S<T*>; | |
1661 | ||
1662 | The second declaration is OK because `T*' uses the template | |
1663 | parameter T, whereas | |
1664 | ||
1665 | template <class T> struct S<int>; | |
1666 | ||
1667 | is no good. Even trickier is: | |
1668 | ||
1669 | template <class T> | |
1670 | struct S1 | |
1671 | { | |
1672 | template <class U> | |
1673 | struct S2; | |
1674 | template <class U> | |
1675 | struct S2<T>; | |
1676 | }; | |
1677 | ||
1678 | The S2<T> declaration is actually illegal; it is a | |
1679 | full-specialization. Of course, | |
1680 | ||
1681 | template <class U> | |
1682 | struct S2<T (*)(U)>; | |
1683 | ||
1684 | or some such would have been OK. */ | |
1685 | int i; | |
1686 | struct template_parm_data tpd; | |
1687 | int ntparms = TREE_VEC_LENGTH (TREE_VALUE (current_template_parms)); | |
1688 | int did_error_intro = 0; | |
1689 | ||
1690 | tpd.level = TREE_INT_CST_HIGH (TREE_PURPOSE (current_template_parms)); | |
1691 | tpd.parms = alloca (sizeof (int) * ntparms); | |
1692 | for (i = 0; i < ntparms; ++i) | |
1693 | tpd.parms[i] = 0; | |
1694 | for (i = 0; i < TREE_VEC_LENGTH (mainargs); ++i) | |
1695 | for_each_template_parm (TREE_VEC_ELT (mainargs, i), | |
1696 | &mark_template_parm, | |
1697 | &tpd); | |
1698 | for (i = 0; i < ntparms; ++i) | |
1699 | if (tpd.parms[i] == 0) | |
1700 | { | |
1701 | /* One of the template parms was not used in the | |
1702 | specialization. */ | |
1703 | if (!did_error_intro) | |
1704 | { | |
1705 | cp_error ("template parameters not used in partial specialization:"); | |
1706 | did_error_intro = 1; | |
1707 | } | |
1708 | ||
1709 | cp_error (" `%D'", | |
1710 | TREE_VALUE (TREE_VEC_ELT | |
1711 | (TREE_VALUE (current_template_parms), | |
1712 | i))); | |
1713 | } | |
1714 | ||
73aad9b9 JM |
1715 | for (; spec; spec = TREE_CHAIN (spec)) |
1716 | { | |
1717 | /* purpose: args to main template | |
1718 | value: spec template */ | |
1719 | if (comp_template_args (TREE_PURPOSE (spec), mainargs)) | |
3ac3d9ea | 1720 | return decl; |
73aad9b9 JM |
1721 | } |
1722 | ||
6633d636 MS |
1723 | DECL_TEMPLATE_SPECIALIZATIONS (maintmpl) = CLASSTYPE_TI_SPEC_INFO (type) |
1724 | = perm_tree_cons (mainargs, TREE_VALUE (current_template_parms), | |
1725 | DECL_TEMPLATE_SPECIALIZATIONS (maintmpl)); | |
73aad9b9 | 1726 | TREE_TYPE (DECL_TEMPLATE_SPECIALIZATIONS (maintmpl)) = type; |
3ac3d9ea | 1727 | return decl; |
73aad9b9 JM |
1728 | } |
1729 | ||
9a3b49ac MS |
1730 | args = current_template_args (); |
1731 | ||
f84b4be9 JM |
1732 | if (!ctx |
1733 | || TREE_CODE (ctx) == FUNCTION_DECL | |
1734 | || TYPE_BEING_DEFINED (ctx) | |
1735 | || (is_friend && !DECL_TEMPLATE_INFO (decl))) | |
8d08fdba | 1736 | { |
75650646 | 1737 | if (DECL_LANG_SPECIFIC (decl) |
f84b4be9 JM |
1738 | && DECL_TEMPLATE_INFO (decl) |
1739 | && DECL_TI_TEMPLATE (decl)) | |
1740 | tmpl = DECL_TI_TEMPLATE (decl); | |
1741 | else | |
786b5245 | 1742 | { |
f84b4be9 JM |
1743 | tmpl = build_template_decl (decl, current_template_parms); |
1744 | ||
1745 | if (DECL_LANG_SPECIFIC (decl) | |
1746 | && DECL_TEMPLATE_SPECIALIZATION (decl)) | |
1747 | { | |
1748 | /* A specialization of a member template of a template | |
1749 | class. */ | |
1750 | SET_DECL_TEMPLATE_SPECIALIZATION (tmpl); | |
1751 | DECL_TEMPLATE_INFO (tmpl) = DECL_TEMPLATE_INFO (decl); | |
1752 | DECL_TEMPLATE_INFO (decl) = NULL_TREE; | |
1753 | } | |
786b5245 | 1754 | } |
8d08fdba MS |
1755 | } |
1756 | else | |
1757 | { | |
6633d636 | 1758 | tree t; |
98c1c668 | 1759 | tree a; |
6633d636 | 1760 | |
73aad9b9 JM |
1761 | if (CLASSTYPE_TEMPLATE_INSTANTIATION (ctx)) |
1762 | cp_error ("must specialize `%#T' before defining member `%#D'", | |
1763 | ctx, decl); | |
824b9a4c | 1764 | if (TREE_CODE (decl) == TYPE_DECL && DECL_ARTIFICIAL (decl)) |
5566b478 | 1765 | tmpl = CLASSTYPE_TI_TEMPLATE (TREE_TYPE (decl)); |
fc378698 | 1766 | else if (! DECL_TEMPLATE_INFO (decl)) |
c91a56d2 MS |
1767 | { |
1768 | cp_error ("template definition of non-template `%#D'", decl); | |
3ac3d9ea | 1769 | return decl; |
c91a56d2 | 1770 | } |
8d08fdba | 1771 | else |
5566b478 | 1772 | tmpl = DECL_TI_TEMPLATE (decl); |
98c1c668 JM |
1773 | |
1774 | if (is_member_template (tmpl)) | |
1775 | { | |
75650646 MM |
1776 | if (DECL_TEMPLATE_INFO (decl) && DECL_TI_ARGS (decl) |
1777 | && DECL_TEMPLATE_SPECIALIZATION (decl)) | |
1778 | { | |
1779 | tree new_tmpl; | |
1780 | ||
1781 | /* The declaration is a specialization of a member | |
1782 | template, declared outside the class. Therefore, the | |
1783 | innermost template arguments will be NULL, so we | |
1784 | replace them with the arguments determined by the | |
1785 | earlier call to check_explicit_specialization. */ | |
1786 | args = DECL_TI_ARGS (decl); | |
1787 | ||
1788 | new_tmpl | |
1789 | = build_template_decl (decl, current_template_parms); | |
1790 | DECL_TEMPLATE_RESULT (new_tmpl) = decl; | |
1791 | TREE_TYPE (new_tmpl) = TREE_TYPE (decl); | |
1792 | DECL_TI_TEMPLATE (decl) = new_tmpl; | |
1793 | SET_DECL_TEMPLATE_SPECIALIZATION (new_tmpl); | |
1794 | DECL_TEMPLATE_INFO (new_tmpl) = | |
1795 | perm_tree_cons (tmpl, args, NULL_TREE); | |
1796 | ||
1797 | register_specialization (new_tmpl, tmpl, args); | |
3ac3d9ea | 1798 | return decl; |
75650646 MM |
1799 | } |
1800 | ||
98c1c668 JM |
1801 | a = TREE_VEC_ELT (args, TREE_VEC_LENGTH (args) - 1); |
1802 | t = DECL_INNERMOST_TEMPLATE_PARMS (DECL_TI_TEMPLATE (decl)); | |
f84b4be9 | 1803 | if (TREE_VEC_LENGTH (t) != TREE_VEC_LENGTH (a)) |
98c1c668 JM |
1804 | { |
1805 | cp_error ("got %d template parameters for `%#D'", | |
1806 | TREE_VEC_LENGTH (a), decl); | |
1807 | cp_error (" but %d required", TREE_VEC_LENGTH (t)); | |
1808 | } | |
1809 | if (TREE_VEC_LENGTH (args) > 1) | |
1810 | /* Get the template parameters for the enclosing template | |
1811 | class. */ | |
1812 | a = TREE_VEC_ELT (args, TREE_VEC_LENGTH (args) - 2); | |
1813 | else | |
1814 | a = NULL_TREE; | |
1815 | } | |
1816 | else | |
1817 | a = TREE_VEC_ELT (args, TREE_VEC_LENGTH (args) - 1); | |
1818 | ||
1819 | t = NULL_TREE; | |
6633d636 MS |
1820 | |
1821 | if (CLASSTYPE_TEMPLATE_SPECIALIZATION (ctx)) | |
98c1c668 JM |
1822 | { |
1823 | /* When processing an inline member template of a | |
1824 | specialized class, there is no CLASSTYPE_TI_SPEC_INFO. */ | |
1825 | if (CLASSTYPE_TI_SPEC_INFO (ctx)) | |
1826 | t = TREE_VALUE (CLASSTYPE_TI_SPEC_INFO (ctx)); | |
1827 | } | |
1828 | else if (CLASSTYPE_TEMPLATE_INFO (ctx)) | |
1829 | t = DECL_INNERMOST_TEMPLATE_PARMS (CLASSTYPE_TI_TEMPLATE (ctx)); | |
1830 | ||
1831 | /* There should be template arguments if and only if there is a | |
1832 | template class. */ | |
1833 | my_friendly_assert((a != NULL_TREE) == (t != NULL_TREE), 0); | |
6633d636 | 1834 | |
98c1c668 JM |
1835 | if (t != NULL_TREE |
1836 | && TREE_VEC_LENGTH (t) != TREE_VEC_LENGTH (a)) | |
6633d636 MS |
1837 | { |
1838 | cp_error ("got %d template parameters for `%#D'", | |
98c1c668 | 1839 | TREE_VEC_LENGTH (a), decl); |
6633d636 MS |
1840 | cp_error (" but `%#T' has %d", ctx, TREE_VEC_LENGTH (t)); |
1841 | } | |
5566b478 | 1842 | } |
830bfa74 MM |
1843 | /* Get the innermost set of template arguments. We don't do this |
1844 | for a non-template member function of a nested template class | |
1845 | because there we will never get a `partial instantiation' of the | |
1846 | function containing the outer arguments, and so we must save all | |
1847 | of the arguments here. */ | |
1848 | if (TREE_CODE (decl) != FUNCTION_DECL | |
1849 | || template_class_depth (ctx) <= 1 | |
1850 | || primary) | |
1851 | args = innermost_args (args, 0); | |
8d08fdba | 1852 | |
5566b478 MS |
1853 | DECL_TEMPLATE_RESULT (tmpl) = decl; |
1854 | TREE_TYPE (tmpl) = TREE_TYPE (decl); | |
8d08fdba | 1855 | |
6757edfe MM |
1856 | if (! ctx && !(is_friend && template_class_depth (info) > 0)) |
1857 | /* Note that we do not try to push a global template friend | |
1858 | declared in a template class; such a thing may well depend on | |
1859 | the template parameters of the class. */ | |
2c73f9f5 | 1860 | tmpl = pushdecl_namespace_level (tmpl); |
8d08fdba | 1861 | |
5566b478 | 1862 | if (primary) |
6757edfe | 1863 | DECL_PRIMARY_TEMPLATE (tmpl) = tmpl; |
5566b478 MS |
1864 | |
1865 | info = perm_tree_cons (tmpl, args, NULL_TREE); | |
1866 | ||
824b9a4c | 1867 | if (TREE_CODE (decl) == TYPE_DECL && DECL_ARTIFICIAL (decl)) |
8d08fdba | 1868 | { |
5566b478 | 1869 | CLASSTYPE_TEMPLATE_INFO (TREE_TYPE (tmpl)) = info; |
75650646 MM |
1870 | if (!ctx || TREE_CODE (ctx) != FUNCTION_DECL) |
1871 | DECL_NAME (decl) = classtype_mangled_name (TREE_TYPE (decl)); | |
51c184be | 1872 | } |
ec255269 MS |
1873 | else if (! DECL_LANG_SPECIFIC (decl)) |
1874 | cp_error ("template declaration of `%#D'", decl); | |
51c184be | 1875 | else |
5566b478 | 1876 | DECL_TEMPLATE_INFO (decl) = info; |
3ac3d9ea MM |
1877 | |
1878 | return DECL_TEMPLATE_RESULT (tmpl); | |
8d08fdba MS |
1879 | } |
1880 | ||
6757edfe MM |
1881 | tree |
1882 | push_template_decl (decl) | |
1883 | tree decl; | |
1884 | { | |
1885 | return push_template_decl_real (decl, 0); | |
1886 | } | |
1887 | ||
1888 | /* Called when a class template TYPE is redeclared with the indicated | |
1889 | template PARMS, e.g.: | |
7fe6899f MM |
1890 | |
1891 | template <class T> struct S; | |
1892 | template <class T> struct S {}; */ | |
1893 | ||
1894 | void | |
6757edfe | 1895 | redeclare_class_template (type, parms) |
7fe6899f | 1896 | tree type; |
6757edfe | 1897 | tree parms; |
7fe6899f MM |
1898 | { |
1899 | tree tmpl = CLASSTYPE_TI_TEMPLATE (type); | |
6757edfe | 1900 | tree tmpl_parms; |
7fe6899f MM |
1901 | int i; |
1902 | ||
1903 | if (!PRIMARY_TEMPLATE_P (tmpl)) | |
1904 | /* The type is nested in some template class. Nothing to worry | |
1905 | about here; there are no new template parameters for the nested | |
1906 | type. */ | |
1907 | return; | |
1908 | ||
6757edfe MM |
1909 | parms = INNERMOST_TEMPLATE_PARMS (parms); |
1910 | tmpl_parms = DECL_INNERMOST_TEMPLATE_PARMS (tmpl); | |
1911 | ||
7fe6899f MM |
1912 | if (TREE_VEC_LENGTH (parms) != TREE_VEC_LENGTH (tmpl_parms)) |
1913 | { | |
1914 | cp_error_at ("previous declaration `%D'", tmpl); | |
1915 | cp_error ("used %d template parameter%s instead of %d", | |
1916 | TREE_VEC_LENGTH (tmpl_parms), | |
1917 | TREE_VEC_LENGTH (tmpl_parms) == 1 ? "" : "s", | |
1918 | TREE_VEC_LENGTH (parms)); | |
1919 | return; | |
1920 | } | |
1921 | ||
1922 | for (i = 0; i < TREE_VEC_LENGTH (tmpl_parms); ++i) | |
1923 | { | |
1924 | tree tmpl_parm = TREE_VALUE (TREE_VEC_ELT (tmpl_parms, i)); | |
1925 | tree parm = TREE_VALUE (TREE_VEC_ELT (parms, i)); | |
1926 | tree tmpl_default = TREE_PURPOSE (TREE_VEC_ELT (tmpl_parms, i)); | |
1927 | tree parm_default = TREE_PURPOSE (TREE_VEC_ELT (parms, i)); | |
1928 | ||
1929 | if (TREE_CODE (tmpl_parm) != TREE_CODE (parm)) | |
1930 | { | |
1931 | cp_error_at ("template parameter `%#D'", tmpl_parm); | |
1932 | cp_error ("redeclared here as `%#D'", parm); | |
1933 | return; | |
1934 | } | |
1935 | ||
1936 | if (tmpl_default != NULL_TREE && parm_default != NULL_TREE) | |
1937 | { | |
1938 | /* We have in [temp.param]: | |
1939 | ||
1940 | A template-parameter may not be given default arguments | |
1941 | by two different declarations in the same scope. */ | |
1942 | cp_error ("redefinition of default argument for `%#D'", parm); | |
4a95fafe | 1943 | cp_error_at (" original definition appeared here", tmpl_parm); |
7fe6899f MM |
1944 | return; |
1945 | } | |
1946 | ||
1947 | if (parm_default != NULL_TREE) | |
1948 | /* Update the previous template parameters (which are the ones | |
1949 | that will really count) with the new default value. */ | |
1950 | TREE_PURPOSE (TREE_VEC_ELT (tmpl_parms, i)) = parm_default; | |
1951 | } | |
1952 | } | |
75650646 | 1953 | |
75650646 MM |
1954 | /* Attempt to convert the non-type template parameter EXPR to the |
1955 | indicated TYPE. If the conversion is successful, return the | |
1956 | converted value. If the conversion is unsuccesful, return | |
1957 | NULL_TREE if we issued an error message, or error_mark_node if we | |
1958 | did not. We issue error messages for out-and-out bad template | |
1959 | parameters, but not simply because the conversion failed, since we | |
1960 | might be just trying to do argument deduction. By the time this | |
1961 | function is called, neither TYPE nor EXPR may make use of template | |
1962 | parameters. */ | |
1963 | ||
1964 | static tree | |
e1467ff2 | 1965 | convert_nontype_argument (type, expr) |
75650646 MM |
1966 | tree type; |
1967 | tree expr; | |
1968 | { | |
1969 | tree expr_type = TREE_TYPE (expr); | |
1970 | ||
1971 | /* A template-argument for a non-type, non-template | |
1972 | template-parameter shall be one of: | |
1973 | ||
1974 | --an integral constant-expression of integral or enumeration | |
1975 | type; or | |
1976 | ||
1977 | --the name of a non-type template-parameter; or | |
1978 | ||
1979 | --the name of an object or function with external linkage, | |
1980 | including function templates and function template-ids but | |
86052cc3 | 1981 | excluding non-static class members, expressed as id-expression; |
75650646 MM |
1982 | or |
1983 | ||
1984 | --the address of an object or function with external linkage, | |
1985 | including function templates and function template-ids but | |
1986 | excluding non-static class members, expressed as & id-expression | |
1987 | where the & is optional if the name refers to a function or | |
1988 | array; or | |
1989 | ||
1990 | --a pointer to member expressed as described in _expr.unary.op_. */ | |
1991 | ||
86052cc3 JM |
1992 | /* An integral constant-expression can include const variables |
1993 | or enumerators. */ | |
1994 | if (INTEGRAL_TYPE_P (expr_type) && TREE_READONLY_DECL_P (expr)) | |
1995 | expr = decl_constant_value (expr); | |
1996 | ||
7bf2682f MM |
1997 | if (is_overloaded_fn (expr)) |
1998 | /* OK for now. We'll check that it has external linkage later. | |
1999 | Check this first since if expr_type is the unknown_type_node | |
2000 | we would otherwise complain below. */ | |
2001 | ; | |
2002 | else if (INTEGRAL_TYPE_P (expr_type) | |
2003 | || TYPE_PTRMEM_P (expr_type) | |
2004 | || TYPE_PTRMEMFUNC_P (expr_type) | |
2005 | /* The next two are g++ extensions. */ | |
2006 | || TREE_CODE (expr_type) == REAL_TYPE | |
2007 | || TREE_CODE (expr_type) == COMPLEX_TYPE) | |
75650646 | 2008 | { |
86052cc3 | 2009 | if (! TREE_CONSTANT (expr)) |
75650646 MM |
2010 | { |
2011 | cp_error ("non-constant `%E' cannot be used as template argument", | |
2012 | expr); | |
2013 | return NULL_TREE; | |
2014 | } | |
2015 | } | |
2016 | else if (TYPE_PTR_P (expr_type) | |
2017 | /* If expr is the address of an overloaded function, we | |
2018 | will get the unknown_type_node at this point. */ | |
2019 | || expr_type == unknown_type_node) | |
2020 | { | |
2021 | tree referent; | |
49bf0d6f MM |
2022 | tree e = expr; |
2023 | STRIP_NOPS (e); | |
75650646 | 2024 | |
49bf0d6f | 2025 | if (TREE_CODE (e) != ADDR_EXPR) |
75650646 MM |
2026 | { |
2027 | bad_argument: | |
2028 | cp_error ("`%E' is not a valid template argument", expr); | |
2029 | error ("it must be %s%s with external linkage", | |
2030 | TREE_CODE (TREE_TYPE (expr)) == POINTER_TYPE | |
2031 | ? "a pointer to " : "", | |
2032 | TREE_CODE (TREE_TYPE (TREE_TYPE (expr))) == FUNCTION_TYPE | |
2033 | ? "a function" : "an object"); | |
2034 | return NULL_TREE; | |
2035 | } | |
2036 | ||
49bf0d6f | 2037 | referent = TREE_OPERAND (e, 0); |
75650646 MM |
2038 | STRIP_NOPS (referent); |
2039 | ||
2040 | if (TREE_CODE (referent) == STRING_CST) | |
2041 | { | |
2042 | cp_error ("string literal %E is not a valid template argument", | |
2043 | referent); | |
2044 | error ("because it is the address of an object with static linkage"); | |
2045 | return NULL_TREE; | |
2046 | } | |
2047 | ||
2048 | if (is_overloaded_fn (referent)) | |
2049 | /* We'll check that it has external linkage later. */ | |
2050 | ; | |
2051 | else if (TREE_CODE (referent) != VAR_DECL) | |
2052 | goto bad_argument; | |
2053 | else if (!TREE_PUBLIC (referent)) | |
2054 | { | |
2055 | cp_error ("address of non-extern `%E' cannot be used as template argument", referent); | |
2056 | return error_mark_node; | |
2057 | } | |
2058 | } | |
c29c4e23 | 2059 | else if (TREE_CODE (expr) == VAR_DECL) |
75650646 MM |
2060 | { |
2061 | if (!TREE_PUBLIC (expr)) | |
2062 | goto bad_argument; | |
2063 | } | |
75650646 MM |
2064 | else |
2065 | { | |
2066 | cp_error ("object `%E' cannot be used as template argument", expr); | |
2067 | return NULL_TREE; | |
2068 | } | |
2069 | ||
2070 | switch (TREE_CODE (type)) | |
2071 | { | |
2072 | case INTEGER_TYPE: | |
2073 | case BOOLEAN_TYPE: | |
2074 | case ENUMERAL_TYPE: | |
2075 | /* For a non-type template-parameter of integral or enumeration | |
2076 | type, integral promotions (_conv.prom_) and integral | |
2077 | conversions (_conv.integral_) are applied. */ | |
2078 | if (!INTEGRAL_TYPE_P (expr_type)) | |
2079 | return error_mark_node; | |
2080 | ||
2081 | /* It's safe to call digest_init in this case; we know we're | |
2082 | just converting one integral constant expression to another. */ | |
2083 | return digest_init (type, expr, (tree*) 0); | |
2084 | ||
abff8e06 JM |
2085 | case REAL_TYPE: |
2086 | case COMPLEX_TYPE: | |
2087 | /* These are g++ extensions. */ | |
2088 | if (TREE_CODE (expr_type) != TREE_CODE (type)) | |
2089 | return error_mark_node; | |
2090 | ||
2091 | return digest_init (type, expr, (tree*) 0); | |
2092 | ||
75650646 MM |
2093 | case POINTER_TYPE: |
2094 | { | |
2095 | tree type_pointed_to = TREE_TYPE (type); | |
2096 | ||
2097 | if (TYPE_PTRMEM_P (type)) | |
2098 | /* For a non-type template-parameter of type pointer to data | |
2099 | member, qualification conversions (_conv.qual_) are | |
2100 | applied. */ | |
2101 | return perform_qualification_conversions (type, expr); | |
2102 | else if (TREE_CODE (type_pointed_to) == FUNCTION_TYPE) | |
2103 | { | |
2104 | /* For a non-type template-parameter of type pointer to | |
2105 | function, only the function-to-pointer conversion | |
2106 | (_conv.func_) is applied. If the template-argument | |
2107 | represents a set of overloaded functions (or a pointer to | |
2108 | such), the matching function is selected from the set | |
2109 | (_over.over_). */ | |
2110 | tree fns; | |
2111 | tree fn; | |
2112 | ||
7bf2682f | 2113 | if (TREE_CODE (expr) == ADDR_EXPR) |
75650646 MM |
2114 | fns = TREE_OPERAND (expr, 0); |
2115 | else | |
2116 | fns = expr; | |
2117 | ||
e1467ff2 | 2118 | fn = instantiate_type (type_pointed_to, fns, 0); |
75650646 MM |
2119 | |
2120 | if (fn == error_mark_node) | |
2121 | return error_mark_node; | |
2122 | ||
2123 | if (!TREE_PUBLIC (fn)) | |
2124 | { | |
2125 | if (really_overloaded_fn (fns)) | |
2126 | return error_mark_node; | |
2127 | else | |
2128 | goto bad_argument; | |
2129 | } | |
2130 | ||
2131 | expr = build_unary_op (ADDR_EXPR, fn, 0); | |
2132 | ||
2133 | my_friendly_assert (comptypes (type, TREE_TYPE (expr), 1), | |
2134 | 0); | |
2135 | return expr; | |
2136 | } | |
2137 | else | |
2138 | { | |
2139 | /* For a non-type template-parameter of type pointer to | |
2140 | object, qualification conversions (_conv.qual_) and the | |
2141 | array-to-pointer conversion (_conv.array_) are applied. | |
2142 | [Note: In particular, neither the null pointer conversion | |
2143 | (_conv.ptr_) nor the derived-to-base conversion | |
2144 | (_conv.ptr_) are applied. Although 0 is a valid | |
2145 | template-argument for a non-type template-parameter of | |
2146 | integral type, it is not a valid template-argument for a | |
e1467ff2 MM |
2147 | non-type template-parameter of pointer type.] |
2148 | ||
2149 | The call to decay_conversion performs the | |
2150 | array-to-pointer conversion, if appropriate. */ | |
2151 | expr = decay_conversion (expr); | |
75650646 MM |
2152 | |
2153 | if (expr == error_mark_node) | |
2154 | return error_mark_node; | |
2155 | else | |
2156 | return perform_qualification_conversions (type, expr); | |
2157 | } | |
2158 | } | |
2159 | break; | |
2160 | ||
2161 | case REFERENCE_TYPE: | |
2162 | { | |
2163 | tree type_referred_to = TREE_TYPE (type); | |
2164 | ||
2165 | if (TREE_CODE (type_referred_to) == FUNCTION_TYPE) | |
2166 | { | |
2167 | /* For a non-type template-parameter of type reference to | |
2168 | function, no conversions apply. If the | |
2169 | template-argument represents a set of overloaded | |
2170 | functions, the matching function is selected from the | |
2171 | set (_over.over_). */ | |
2172 | tree fns = expr; | |
2173 | tree fn; | |
2174 | ||
e1467ff2 | 2175 | fn = instantiate_type (type_referred_to, fns, 0); |
75650646 MM |
2176 | |
2177 | if (!TREE_PUBLIC (fn)) | |
2178 | { | |
2179 | if (really_overloaded_fn (fns)) | |
2180 | /* Don't issue an error here; we might get a different | |
2181 | function if the overloading had worked out | |
2182 | differently. */ | |
2183 | return error_mark_node; | |
2184 | else | |
2185 | goto bad_argument; | |
2186 | } | |
2187 | ||
2188 | if (fn == error_mark_node) | |
2189 | return error_mark_node; | |
2190 | ||
2191 | my_friendly_assert (comptypes (type, TREE_TYPE (fn), 1), | |
2192 | 0); | |
2193 | ||
2194 | return fn; | |
2195 | } | |
2196 | else | |
2197 | { | |
2198 | /* For a non-type template-parameter of type reference to | |
2199 | object, no conversions apply. The type referred to by the | |
2200 | reference may be more cv-qualified than the (otherwise | |
2201 | identical) type of the template-argument. The | |
2202 | template-parameter is bound directly to the | |
2203 | template-argument, which must be an lvalue. */ | |
2204 | if (!comptypes (TYPE_MAIN_VARIANT (expr_type), | |
2205 | TYPE_MAIN_VARIANT (type), 1) | |
2206 | || (TYPE_READONLY (expr_type) > | |
2207 | TYPE_READONLY (type_referred_to)) | |
2208 | || (TYPE_VOLATILE (expr_type) > | |
2209 | TYPE_VOLATILE (type_referred_to)) | |
2210 | || !real_lvalue_p (expr)) | |
2211 | return error_mark_node; | |
2212 | else | |
2213 | return expr; | |
2214 | } | |
2215 | } | |
2216 | break; | |
2217 | ||
2218 | case RECORD_TYPE: | |
2219 | { | |
2220 | tree fns; | |
2221 | tree fn; | |
2222 | ||
2223 | my_friendly_assert (TYPE_PTRMEMFUNC_P (type), 0); | |
2224 | ||
2225 | /* For a non-type template-parameter of type pointer to member | |
2226 | function, no conversions apply. If the template-argument | |
2227 | represents a set of overloaded member functions, the | |
2228 | matching member function is selected from the set | |
2229 | (_over.over_). */ | |
2230 | ||
2231 | if (!TYPE_PTRMEMFUNC_P (expr_type) && | |
2232 | expr_type != unknown_type_node) | |
2233 | return error_mark_node; | |
2234 | ||
2235 | if (TREE_CODE (expr) == CONSTRUCTOR) | |
2236 | { | |
2237 | /* A ptr-to-member constant. */ | |
2238 | if (!comptypes (type, expr_type, 1)) | |
2239 | return error_mark_node; | |
2240 | else | |
2241 | return expr; | |
2242 | } | |
2243 | ||
2244 | if (TREE_CODE (expr) != ADDR_EXPR) | |
2245 | return error_mark_node; | |
2246 | ||
2247 | fns = TREE_OPERAND (expr, 0); | |
2248 | ||
e1467ff2 MM |
2249 | fn = instantiate_type (TREE_TYPE (TREE_TYPE (type)), |
2250 | fns, 0); | |
75650646 MM |
2251 | |
2252 | if (fn == error_mark_node) | |
2253 | return error_mark_node; | |
2254 | ||
2255 | expr = build_unary_op (ADDR_EXPR, fn, 0); | |
2256 | ||
2257 | my_friendly_assert (comptypes (type, TREE_TYPE (expr), 1), | |
2258 | 0); | |
2259 | return expr; | |
2260 | } | |
2261 | break; | |
2262 | ||
2263 | default: | |
2264 | /* All non-type parameters must have one of these types. */ | |
2265 | my_friendly_abort (0); | |
2266 | break; | |
2267 | } | |
2268 | ||
2269 | return error_mark_node; | |
2270 | } | |
2271 | ||
8d08fdba MS |
2272 | /* Convert all template arguments to their appropriate types, and return |
2273 | a vector containing the resulting values. If any error occurs, return | |
75650646 MM |
2274 | error_mark_node, and, if COMPLAIN is non-zero, issue an error message. |
2275 | Some error messages are issued even if COMPLAIN is zero; for | |
2276 | instance, if a template argument is composed from a local class. | |
2277 | ||
2278 | If REQUIRE_ALL_ARGUMENTS is non-zero, all arguments must be | |
2279 | provided in ARGLIST, or else trailing parameters must have default | |
2280 | values. If REQUIRE_ALL_ARGUMENTS is zero, we will attempt argument | |
de575009 KL |
2281 | deduction for any unspecified trailing arguments. |
2282 | ||
2283 | If IS_TMPL_PARM is non-zero, we will coercing parameters of template | |
2284 | template arguments. In this case, ARGLIST is a chain of TREE_LIST | |
2285 | nodes containing TYPE_DECL, TEMPLATE_DECL or PARM_DECL. */ | |
e92cc029 | 2286 | |
8d08fdba | 2287 | static tree |
75650646 MM |
2288 | coerce_template_parms (parms, arglist, in_decl, |
2289 | complain, | |
de575009 KL |
2290 | require_all_arguments, |
2291 | is_tmpl_parm) | |
8d08fdba MS |
2292 | tree parms, arglist; |
2293 | tree in_decl; | |
75650646 MM |
2294 | int complain; |
2295 | int require_all_arguments; | |
de575009 | 2296 | int is_tmpl_parm; |
8d08fdba | 2297 | { |
a292b002 | 2298 | int nparms, nargs, i, lost = 0; |
75650646 | 2299 | tree vec = NULL_TREE; |
8d08fdba | 2300 | |
a292b002 MS |
2301 | if (arglist == NULL_TREE) |
2302 | nargs = 0; | |
2303 | else if (TREE_CODE (arglist) == TREE_VEC) | |
2304 | nargs = TREE_VEC_LENGTH (arglist); | |
8d08fdba | 2305 | else |
a292b002 MS |
2306 | nargs = list_length (arglist); |
2307 | ||
2308 | nparms = TREE_VEC_LENGTH (parms); | |
2309 | ||
2310 | if (nargs > nparms | |
2311 | || (nargs < nparms | |
75650646 | 2312 | && require_all_arguments |
a292b002 | 2313 | && TREE_PURPOSE (TREE_VEC_ELT (parms, nargs)) == NULL_TREE)) |
8d08fdba | 2314 | { |
75650646 MM |
2315 | if (complain) |
2316 | { | |
2317 | error ("incorrect number of parameters (%d, should be %d)", | |
2318 | nargs, nparms); | |
2319 | ||
2320 | if (in_decl) | |
2321 | cp_error_at ("in template expansion for decl `%D'", | |
2322 | in_decl); | |
2323 | } | |
2324 | ||
8d08fdba MS |
2325 | return error_mark_node; |
2326 | } | |
2327 | ||
e7e66632 KL |
2328 | if (arglist && TREE_CODE (arglist) == TREE_VEC && nargs == nparms) |
2329 | vec = copy_node (arglist); | |
8d08fdba MS |
2330 | else |
2331 | { | |
2332 | vec = make_tree_vec (nparms); | |
75650646 | 2333 | |
8d08fdba MS |
2334 | for (i = 0; i < nparms; i++) |
2335 | { | |
a292b002 | 2336 | tree arg; |
75650646 | 2337 | tree parm = TREE_VEC_ELT (parms, i); |
a292b002 MS |
2338 | |
2339 | if (arglist) | |
2340 | { | |
2341 | arg = arglist; | |
2342 | arglist = TREE_CHAIN (arglist); | |
2343 | ||
2344 | if (arg == error_mark_node) | |
2345 | lost++; | |
2346 | else | |
2347 | arg = TREE_VALUE (arg); | |
2348 | } | |
e7e66632 KL |
2349 | else if (is_tmpl_parm && i < nargs) |
2350 | { | |
2351 | arg = TREE_VEC_ELT (arglist, i); | |
2352 | if (arg == error_mark_node) | |
2353 | lost++; | |
2354 | } | |
75650646 MM |
2355 | else if (TREE_PURPOSE (parm) == NULL_TREE) |
2356 | { | |
2357 | my_friendly_assert (!require_all_arguments, 0); | |
2358 | break; | |
2359 | } | |
2360 | else if (TREE_CODE (TREE_VALUE (parm)) == TYPE_DECL) | |
f7d98d58 | 2361 | arg = tsubst (TREE_PURPOSE (parm), vec, in_decl); |
d2e5ee5c | 2362 | else |
f7d98d58 | 2363 | arg = tsubst_expr (TREE_PURPOSE (parm), vec, in_decl); |
a292b002 | 2364 | |
8d08fdba MS |
2365 | TREE_VEC_ELT (vec, i) = arg; |
2366 | } | |
2367 | } | |
2368 | for (i = 0; i < nparms; i++) | |
2369 | { | |
2370 | tree arg = TREE_VEC_ELT (vec, i); | |
a292b002 | 2371 | tree parm = TREE_VALUE (TREE_VEC_ELT (parms, i)); |
8d08fdba | 2372 | tree val = 0; |
73b0fce8 | 2373 | int is_type, requires_type, is_tmpl_type, requires_tmpl_type; |
8d08fdba | 2374 | |
de575009 KL |
2375 | if (is_tmpl_parm && i < nargs) |
2376 | { | |
2377 | /* In case we are checking arguments inside a template template | |
2378 | parameter, ARG that does not come from default argument is | |
2379 | also a TREE_LIST node. Note that ARG can also be a TREE_LIST | |
2380 | in other cases such as overloaded functions. */ | |
2381 | if (arg != NULL_TREE && arg != error_mark_node) | |
2382 | arg = TREE_VALUE (arg); | |
2383 | } | |
2384 | ||
75650646 MM |
2385 | if (arg == NULL_TREE) |
2386 | /* We're out of arguments. */ | |
2387 | { | |
2388 | my_friendly_assert (!require_all_arguments, 0); | |
2389 | break; | |
2390 | } | |
2391 | ||
2392 | if (arg == error_mark_node) | |
2393 | { | |
2394 | cp_error ("template argument %d is invalid", i + 1); | |
2395 | lost++; | |
2396 | continue; | |
2397 | } | |
2398 | ||
8857f91e MM |
2399 | if (TREE_CODE (arg) == TREE_LIST |
2400 | && TREE_TYPE (arg) != NULL_TREE | |
2401 | && TREE_CODE (TREE_TYPE (arg)) == OFFSET_TYPE) | |
2402 | { | |
2403 | /* The template argument was the name of some | |
2404 | member function. That's usually | |
2405 | illegal, but static members are OK. In any | |
2406 | case, grab the underlying fields/functions | |
2407 | and issue an error later if required. */ | |
2408 | arg = TREE_VALUE (arg); | |
2409 | TREE_TYPE (arg) = unknown_type_node; | |
2410 | } | |
73b0fce8 | 2411 | |
e7e66632 KL |
2412 | requires_tmpl_type = TREE_CODE (parm) == TEMPLATE_DECL; |
2413 | requires_type = TREE_CODE (parm) == TYPE_DECL | |
2414 | || requires_tmpl_type; | |
2415 | ||
2416 | /* Check if it is a class template. If REQUIRES_TMPL_TYPE is true, | |
2417 | we also accept implicitly created TYPE_DECL as a valid argument. */ | |
73b0fce8 KL |
2418 | is_tmpl_type = (TREE_CODE (arg) == TEMPLATE_DECL |
2419 | && TREE_CODE (DECL_TEMPLATE_RESULT (arg)) == TYPE_DECL) | |
2420 | || (TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM | |
e7e66632 KL |
2421 | && !CLASSTYPE_TEMPLATE_INFO (arg)) |
2422 | || (TREE_CODE (arg) == RECORD_TYPE | |
2423 | && CLASSTYPE_TEMPLATE_INFO (arg) | |
2424 | && TREE_CODE (TYPE_NAME (arg)) == TYPE_DECL | |
2425 | && DECL_ARTIFICIAL (TYPE_NAME (arg)) | |
2426 | && requires_tmpl_type); | |
73b0fce8 KL |
2427 | if (is_tmpl_type && TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM) |
2428 | arg = TYPE_STUB_DECL (arg); | |
e7e66632 KL |
2429 | else if (is_tmpl_type && TREE_CODE (arg) == RECORD_TYPE) |
2430 | arg = CLASSTYPE_TI_TEMPLATE (arg); | |
de575009 KL |
2431 | |
2432 | if (is_tmpl_parm && i < nargs) | |
2433 | is_type = TREE_CODE (arg) == TYPE_DECL || is_tmpl_type; | |
2434 | else | |
2435 | is_type = TREE_CODE_CLASS (TREE_CODE (arg)) == 't' || is_tmpl_type; | |
5566b478 MS |
2436 | |
2437 | if (requires_type && ! is_type && TREE_CODE (arg) == SCOPE_REF | |
2438 | && TREE_CODE (TREE_OPERAND (arg, 0)) == TEMPLATE_TYPE_PARM) | |
2439 | { | |
2440 | cp_pedwarn ("to refer to a type member of a template parameter,"); | |
2441 | cp_pedwarn (" use `typename %E'", arg); | |
75650646 | 2442 | |
5566b478 MS |
2443 | arg = make_typename_type (TREE_OPERAND (arg, 0), |
2444 | TREE_OPERAND (arg, 1)); | |
2445 | is_type = 1; | |
2446 | } | |
8d08fdba MS |
2447 | if (is_type != requires_type) |
2448 | { | |
2449 | if (in_decl) | |
5566b478 | 2450 | { |
75650646 MM |
2451 | if (complain) |
2452 | { | |
2453 | cp_error ("type/value mismatch at argument %d in template parameter list for `%D'", | |
2454 | i + 1, in_decl); | |
2455 | if (is_type) | |
2456 | cp_error (" expected a constant of type `%T', got `%T'", | |
73b0fce8 KL |
2457 | TREE_TYPE (parm), |
2458 | (is_tmpl_type ? DECL_NAME (arg) : arg)); | |
75650646 MM |
2459 | else |
2460 | cp_error (" expected a type, got `%E'", arg); | |
2461 | } | |
5566b478 | 2462 | } |
8d08fdba MS |
2463 | lost++; |
2464 | TREE_VEC_ELT (vec, i) = error_mark_node; | |
2465 | continue; | |
2466 | } | |
73b0fce8 KL |
2467 | if (is_tmpl_type ^ requires_tmpl_type) |
2468 | { | |
2469 | if (in_decl) | |
2470 | { | |
2471 | cp_error ("type/value mismatch at argument %d in template parameter list for `%D'", | |
e7e66632 | 2472 | i + 1, in_decl); |
73b0fce8 KL |
2473 | if (is_tmpl_type) |
2474 | cp_error (" expected a type, got `%T'", DECL_NAME (arg)); | |
2475 | else | |
2476 | cp_error (" expected a class template, got `%T'", arg); | |
2477 | } | |
2478 | lost++; | |
2479 | TREE_VEC_ELT (vec, i) = error_mark_node; | |
2480 | continue; | |
2481 | } | |
2482 | if (is_tmpl_parm) | |
2483 | { | |
2484 | if (requires_tmpl_type) | |
2485 | { | |
2486 | cp_error ("nested template template parameter not implemented"); | |
2487 | lost++; | |
2488 | TREE_VEC_ELT (vec, i) = error_mark_node; | |
2489 | } | |
2490 | continue; | |
2491 | } | |
2492 | ||
8d08fdba | 2493 | if (is_type) |
ec255269 | 2494 | { |
73b0fce8 KL |
2495 | if (requires_tmpl_type) |
2496 | { | |
2497 | tree parmparm = DECL_INNERMOST_TEMPLATE_PARMS (parm); | |
2498 | tree argparm = DECL_INNERMOST_TEMPLATE_PARMS (arg); | |
2499 | ||
2500 | /* The parameter and argument roles have to be switched | |
2501 | here in order to handle default arguments properly. | |
2502 | For example, | |
2503 | template<template <class> class TT> void f(TT<int>) | |
2504 | should be able to accept vector<int> which comes from | |
2505 | template <class T, class Allcator = allocator> | |
2506 | class vector. */ | |
2507 | ||
de575009 | 2508 | val = coerce_template_parms (argparm, parmparm, in_decl, 1, 1, 1); |
73b0fce8 KL |
2509 | if (val != error_mark_node) |
2510 | val = arg; | |
2511 | ||
2512 | /* TEMPLATE_TEMPLATE_PARM node is preferred over | |
2513 | TEMPLATE_DECL. */ | |
2514 | if (val != error_mark_node | |
2515 | && DECL_TEMPLATE_TEMPLATE_PARM_P (val)) | |
2516 | val = TREE_TYPE (val); | |
2517 | } | |
2518 | else | |
ec255269 | 2519 | { |
73b0fce8 KL |
2520 | val = groktypename (arg); |
2521 | if (! processing_template_decl) | |
ec255269 | 2522 | { |
73b0fce8 KL |
2523 | tree t = target_type (val); |
2524 | if (TREE_CODE (t) != TYPENAME_TYPE | |
2525 | && IS_AGGR_TYPE (t) | |
2526 | && decl_function_context (TYPE_MAIN_DECL (t))) | |
2527 | { | |
2528 | cp_error ("type `%T' composed from a local class is not a valid template-argument", | |
2529 | val); | |
2530 | return error_mark_node; | |
2531 | } | |
ec255269 MS |
2532 | } |
2533 | } | |
2534 | } | |
8d08fdba MS |
2535 | else |
2536 | { | |
f7d98d58 | 2537 | tree t = tsubst (TREE_TYPE (parm), vec, in_decl); |
75650646 | 2538 | |
4bfc4dda | 2539 | if (processing_template_decl) |
75650646 MM |
2540 | arg = maybe_fold_nontype_arg (arg); |
2541 | ||
2542 | if (!uses_template_parms (arg) && !uses_template_parms (t)) | |
2543 | /* We used to call digest_init here. However, digest_init | |
2544 | will report errors, which we don't want when complain | |
2545 | is zero. More importantly, digest_init will try too | |
2546 | hard to convert things: for example, `0' should not be | |
2547 | converted to pointer type at this point according to | |
2548 | the standard. Accepting this is not merely an | |
2549 | extension, since deciding whether or not these | |
2550 | conversions can occur is part of determining which | |
2551 | function template to call, or whether a given epxlicit | |
2552 | argument specification is legal. */ | |
e1467ff2 | 2553 | val = convert_nontype_argument (t, arg); |
5566b478 | 2554 | else |
6ba4439c MM |
2555 | val = arg; |
2556 | ||
75650646 MM |
2557 | if (val == NULL_TREE) |
2558 | val = error_mark_node; | |
2559 | else if (val == error_mark_node && complain) | |
2560 | cp_error ("could not convert template argument `%E' to `%T'", | |
2561 | arg, t); | |
8d08fdba MS |
2562 | } |
2563 | ||
2564 | if (val == error_mark_node) | |
2565 | lost++; | |
2566 | ||
2567 | TREE_VEC_ELT (vec, i) = val; | |
2568 | } | |
2569 | if (lost) | |
2570 | return error_mark_node; | |
2571 | return vec; | |
2572 | } | |
2573 | ||
f84b4be9 JM |
2574 | /* Renturns 1 iff the OLDARGS and NEWARGS are in fact identical sets |
2575 | of template arguments. Returns 0 otherwise. */ | |
2576 | ||
6757edfe | 2577 | int |
5566b478 MS |
2578 | comp_template_args (oldargs, newargs) |
2579 | tree oldargs, newargs; | |
2580 | { | |
2581 | int i; | |
2582 | ||
386b8a85 JM |
2583 | if (TREE_VEC_LENGTH (oldargs) != TREE_VEC_LENGTH (newargs)) |
2584 | return 0; | |
2585 | ||
5566b478 MS |
2586 | for (i = 0; i < TREE_VEC_LENGTH (oldargs); ++i) |
2587 | { | |
2588 | tree nt = TREE_VEC_ELT (newargs, i); | |
2589 | tree ot = TREE_VEC_ELT (oldargs, i); | |
2590 | ||
2591 | if (nt == ot) | |
2592 | continue; | |
2593 | if (TREE_CODE (nt) != TREE_CODE (ot)) | |
2594 | return 0; | |
00d3396f JM |
2595 | if (TREE_CODE (nt) == TREE_VEC) |
2596 | { | |
2597 | /* For member templates */ | |
2598 | if (comp_template_args (nt, ot)) | |
2599 | continue; | |
2600 | } | |
2601 | else if (TREE_CODE_CLASS (TREE_CODE (ot)) == 't') | |
67d743fe MS |
2602 | { |
2603 | if (comptypes (ot, nt, 1)) | |
2604 | continue; | |
2605 | } | |
2606 | else if (cp_tree_equal (ot, nt) > 0) | |
5566b478 MS |
2607 | continue; |
2608 | return 0; | |
2609 | } | |
2610 | return 1; | |
2611 | } | |
2612 | ||
8d08fdba MS |
2613 | /* Given class template name and parameter list, produce a user-friendly name |
2614 | for the instantiation. */ | |
e92cc029 | 2615 | |
8d08fdba | 2616 | static char * |
75650646 | 2617 | mangle_class_name_for_template (name, parms, arglist, ctx) |
8d08fdba MS |
2618 | char *name; |
2619 | tree parms, arglist; | |
75650646 | 2620 | tree ctx; |
8d08fdba MS |
2621 | { |
2622 | static struct obstack scratch_obstack; | |
2623 | static char *scratch_firstobj; | |
2624 | int i, nparms; | |
8d08fdba MS |
2625 | |
2626 | if (!scratch_firstobj) | |
fc378698 | 2627 | gcc_obstack_init (&scratch_obstack); |
8d08fdba MS |
2628 | else |
2629 | obstack_free (&scratch_obstack, scratch_firstobj); | |
fc378698 | 2630 | scratch_firstobj = obstack_alloc (&scratch_obstack, 1); |
8d08fdba MS |
2631 | |
2632 | #if 0 | |
2633 | #define buflen sizeof(buf) | |
2634 | #define check if (bufp >= buf+buflen-1) goto too_long | |
2635 | #define ccat(c) *bufp++=(c); check | |
2636 | #define advance bufp+=strlen(bufp); check | |
2637 | #define cat(s) strncpy(bufp, s, buf+buflen-bufp-1); advance | |
2638 | #else | |
2639 | #define check | |
2640 | #define ccat(c) obstack_1grow (&scratch_obstack, (c)); | |
2641 | #define advance | |
2642 | #define cat(s) obstack_grow (&scratch_obstack, (s), strlen (s)) | |
2643 | #endif | |
8d08fdba | 2644 | |
2c73f9f5 | 2645 | if (ctx && ctx != global_namespace) |
75650646 | 2646 | { |
e1467ff2 MM |
2647 | char* s; |
2648 | ||
2649 | if (TREE_CODE (ctx) == FUNCTION_DECL) | |
3a56f0ab | 2650 | s = fndecl_as_string (ctx, 0); |
e1467ff2 | 2651 | else if (TREE_CODE_CLASS (TREE_CODE (ctx)) == 't') |
294471c3 | 2652 | s = type_as_string_real (ctx, 0, 1); |
2c73f9f5 ML |
2653 | else if (TREE_CODE (ctx) == NAMESPACE_DECL) |
2654 | s = decl_as_string (ctx, 0); | |
e1467ff2 MM |
2655 | else |
2656 | my_friendly_abort (0); | |
75650646 MM |
2657 | cat (s); |
2658 | cat ("::"); | |
2659 | } | |
8d08fdba MS |
2660 | cat (name); |
2661 | ccat ('<'); | |
2662 | nparms = TREE_VEC_LENGTH (parms); | |
2663 | my_friendly_assert (nparms == TREE_VEC_LENGTH (arglist), 268); | |
2664 | for (i = 0; i < nparms; i++) | |
2665 | { | |
a292b002 MS |
2666 | tree parm = TREE_VALUE (TREE_VEC_ELT (parms, i)); |
2667 | tree arg = TREE_VEC_ELT (arglist, i); | |
8d08fdba MS |
2668 | |
2669 | if (i) | |
2670 | ccat (','); | |
2671 | ||
a292b002 | 2672 | if (TREE_CODE (parm) == TYPE_DECL) |
8d08fdba | 2673 | { |
294471c3 | 2674 | cat (type_as_string_real (arg, 0, 1)); |
8d08fdba MS |
2675 | continue; |
2676 | } | |
73b0fce8 KL |
2677 | else if (TREE_CODE (parm) == TEMPLATE_DECL) |
2678 | { | |
2679 | if (TREE_CODE (arg) == TEMPLATE_DECL) | |
2c73f9f5 ML |
2680 | { |
2681 | /* Already substituted with real template. Just output | |
2682 | the template name here */ | |
2683 | my_friendly_assert (TREE_CODE (DECL_CONTEXT (arg)) | |
2684 | == NAMESPACE_DECL, 980422); | |
2685 | if (DECL_CONTEXT (arg) != global_namespace) | |
2686 | { | |
2687 | cat(decl_as_string (DECL_CONTEXT (arg), 0)); | |
2688 | cat("::"); | |
2689 | } | |
2690 | cat (IDENTIFIER_POINTER (DECL_NAME (arg))); | |
2691 | } | |
73b0fce8 KL |
2692 | else |
2693 | /* Output the parameter declaration */ | |
294471c3 | 2694 | cat (type_as_string_real (arg, 0, 1)); |
73b0fce8 KL |
2695 | continue; |
2696 | } | |
8d08fdba MS |
2697 | else |
2698 | my_friendly_assert (TREE_CODE (parm) == PARM_DECL, 269); | |
2699 | ||
2700 | if (TREE_CODE (arg) == TREE_LIST) | |
2701 | { | |
2702 | /* New list cell was built because old chain link was in | |
2703 | use. */ | |
2704 | my_friendly_assert (TREE_PURPOSE (arg) == NULL_TREE, 270); | |
2705 | arg = TREE_VALUE (arg); | |
2706 | } | |
2707 | /* No need to check arglist against parmlist here; we did that | |
2708 | in coerce_template_parms, called from lookup_template_class. */ | |
2709 | cat (expr_as_string (arg, 0)); | |
2710 | } | |
2711 | { | |
2712 | char *bufp = obstack_next_free (&scratch_obstack); | |
2713 | int offset = 0; | |
2714 | while (bufp[offset - 1] == ' ') | |
2715 | offset--; | |
2716 | obstack_blank_fast (&scratch_obstack, offset); | |
2717 | ||
2718 | /* B<C<char> >, not B<C<char>> */ | |
2719 | if (bufp[offset - 1] == '>') | |
2720 | ccat (' '); | |
2721 | } | |
2722 | ccat ('>'); | |
2723 | ccat ('\0'); | |
2724 | return (char *) obstack_base (&scratch_obstack); | |
2725 | ||
8926095f | 2726 | #if 0 |
8d08fdba | 2727 | too_long: |
8926095f | 2728 | #endif |
8d08fdba MS |
2729 | fatal ("out of (preallocated) string space creating template instantiation name"); |
2730 | /* NOTREACHED */ | |
2731 | return NULL; | |
2732 | } | |
2733 | ||
bd6dd845 | 2734 | static tree |
5566b478 MS |
2735 | classtype_mangled_name (t) |
2736 | tree t; | |
2737 | { | |
2738 | if (CLASSTYPE_TEMPLATE_INFO (t) | |
2739 | && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t))) | |
2740 | { | |
2741 | tree name = DECL_NAME (CLASSTYPE_TI_TEMPLATE (t)); | |
35acd3f2 MM |
2742 | /* We do not pass in the context here since that is only needed |
2743 | when mangling the name of instantiations, not the primary | |
2744 | template declaration. In reality, it should not be needed | |
2745 | then either, but the way lookup_template_class operates | |
2746 | requires the context for the moment. In the long run, | |
2747 | lookup_template_class should not be looking for existing | |
2748 | instantiations by matching mangled names, but rather by | |
2749 | matching the templates, and then scanning the instantiation | |
2750 | list. */ | |
5566b478 MS |
2751 | char *mangled_name = mangle_class_name_for_template |
2752 | (IDENTIFIER_POINTER (name), | |
98c1c668 | 2753 | DECL_INNERMOST_TEMPLATE_PARMS (CLASSTYPE_TI_TEMPLATE (t)), |
35acd3f2 | 2754 | CLASSTYPE_TI_ARGS (t), NULL_TREE); |
5566b478 MS |
2755 | tree id = get_identifier (mangled_name); |
2756 | IDENTIFIER_TEMPLATE (id) = name; | |
2757 | return id; | |
2758 | } | |
2759 | else | |
2760 | return TYPE_IDENTIFIER (t); | |
2761 | } | |
2762 | ||
2763 | static void | |
2764 | add_pending_template (d) | |
2765 | tree d; | |
2766 | { | |
e92cc029 MS |
2767 | tree ti; |
2768 | ||
2769 | if (TREE_CODE_CLASS (TREE_CODE (d)) == 't') | |
2770 | ti = CLASSTYPE_TEMPLATE_INFO (d); | |
2771 | else | |
2772 | ti = DECL_TEMPLATE_INFO (d); | |
2773 | ||
824b9a4c | 2774 | if (TI_PENDING_TEMPLATE_FLAG (ti)) |
5566b478 MS |
2775 | return; |
2776 | ||
2777 | *template_tail = perm_tree_cons | |
2778 | (current_function_decl, d, NULL_TREE); | |
2779 | template_tail = &TREE_CHAIN (*template_tail); | |
824b9a4c | 2780 | TI_PENDING_TEMPLATE_FLAG (ti) = 1; |
5566b478 MS |
2781 | } |
2782 | ||
386b8a85 JM |
2783 | |
2784 | /* Return a TEMPLATE_ID_EXPR corresponding to the indicated FNS (which | |
2785 | may be either a _DECL or an overloaded function or an | |
2786 | IDENTIFIER_NODE), and ARGLIST. */ | |
2787 | ||
2788 | tree | |
2789 | lookup_template_function (fns, arglist) | |
2790 | tree fns, arglist; | |
2791 | { | |
2c73f9f5 | 2792 | tree type; |
050367a3 | 2793 | |
386b8a85 JM |
2794 | if (fns == NULL_TREE) |
2795 | { | |
2796 | cp_error ("non-template used as template"); | |
2797 | return error_mark_node; | |
2798 | } | |
2799 | ||
2800 | if (arglist != NULL_TREE && !TREE_PERMANENT (arglist)) | |
4de02abd | 2801 | copy_to_permanent (arglist); |
386b8a85 | 2802 | |
2c73f9f5 ML |
2803 | type = TREE_TYPE (fns); |
2804 | if (TREE_CODE (fns) == OVERLOAD || !type) | |
2805 | type = unknown_type_node; | |
2806 | ||
2807 | return build_min (TEMPLATE_ID_EXPR, type, fns, arglist); | |
386b8a85 JM |
2808 | } |
2809 | ||
a2b60a0e MM |
2810 | /* Within the scope of a template class S<T>, the name S gets bound |
2811 | (in build_self_reference) to a TYPE_DECL for the class, not a | |
2812 | TEMPLATE_DECL. If DECL is a TYPE_DECL for current_class_type, | |
2813 | or one of its enclosing classes, and that type is a template, | |
2814 | return the associated TEMPLATE_DECL. Otherwise, the original | |
2815 | DECL is returned. */ | |
2816 | ||
2817 | tree | |
2818 | maybe_get_template_decl_from_type_decl (decl) | |
2819 | tree decl; | |
2820 | { | |
2821 | return (decl != NULL_TREE | |
2822 | && TREE_CODE (decl) == TYPE_DECL | |
2823 | && DECL_ARTIFICIAL (decl) | |
2824 | && CLASSTYPE_TEMPLATE_INFO (TREE_TYPE (decl))) | |
2825 | ? CLASSTYPE_TI_TEMPLATE (TREE_TYPE (decl)) : decl; | |
2826 | } | |
386b8a85 | 2827 | |
8d08fdba MS |
2828 | /* Given an IDENTIFIER_NODE (type TEMPLATE_DECL) and a chain of |
2829 | parameters, find the desired type. | |
2830 | ||
2831 | D1 is the PTYPENAME terminal, and ARGLIST is the list of arguments. | |
2832 | Since ARGLIST is build on the decl_obstack, we must copy it here | |
2833 | to keep it from being reclaimed when the decl storage is reclaimed. | |
2834 | ||
2835 | IN_DECL, if non-NULL, is the template declaration we are trying to | |
75650646 MM |
2836 | instantiate. |
2837 | ||
2838 | If the template class is really a local class in a template | |
2839 | function, then the FUNCTION_CONTEXT is the function in which it is | |
2840 | being instantiated. */ | |
e92cc029 | 2841 | |
8d08fdba | 2842 | tree |
e1467ff2 | 2843 | lookup_template_class (d1, arglist, in_decl, context) |
8d08fdba MS |
2844 | tree d1, arglist; |
2845 | tree in_decl; | |
e1467ff2 | 2846 | tree context; |
8d08fdba | 2847 | { |
a703fb38 | 2848 | tree template = NULL_TREE, parmlist; |
8d08fdba | 2849 | char *mangled_name; |
2c73f9f5 | 2850 | tree id, t, id_context; |
5566b478 MS |
2851 | |
2852 | if (TREE_CODE (d1) == IDENTIFIER_NODE) | |
2853 | { | |
73b0fce8 KL |
2854 | if (IDENTIFIER_LOCAL_VALUE (d1) |
2855 | && DECL_TEMPLATE_TEMPLATE_PARM_P (IDENTIFIER_LOCAL_VALUE (d1))) | |
2856 | template = IDENTIFIER_LOCAL_VALUE (d1); | |
2857 | else | |
2858 | { | |
2c73f9f5 ML |
2859 | if (context) |
2860 | push_decl_namespace (context); | |
a2b60a0e MM |
2861 | template = |
2862 | maybe_get_template_decl_from_type_decl | |
2863 | (IDENTIFIER_CLASS_VALUE (d1)); | |
2864 | if (template == NULL_TREE) | |
2c73f9f5 ML |
2865 | template = lookup_name_nonclass (d1); |
2866 | if (context) | |
2867 | pop_decl_namespace (); | |
73b0fce8 | 2868 | } |
8d019cef JM |
2869 | if (template) |
2870 | context = DECL_CONTEXT (template); | |
5566b478 | 2871 | } |
c91a56d2 MS |
2872 | else if (TREE_CODE (d1) == TYPE_DECL && IS_AGGR_TYPE (TREE_TYPE (d1))) |
2873 | { | |
7bf2682f MM |
2874 | if (CLASSTYPE_TEMPLATE_INFO (TREE_TYPE (d1)) == NULL_TREE) |
2875 | return error_mark_node; | |
c91a56d2 MS |
2876 | template = CLASSTYPE_TI_TEMPLATE (TREE_TYPE (d1)); |
2877 | d1 = DECL_NAME (template); | |
2878 | } | |
5566b478 MS |
2879 | else if (TREE_CODE_CLASS (TREE_CODE (d1)) == 't' && IS_AGGR_TYPE (d1)) |
2880 | { | |
2881 | template = CLASSTYPE_TI_TEMPLATE (d1); | |
2882 | d1 = DECL_NAME (template); | |
2883 | } | |
93cdc044 JM |
2884 | else if (TREE_CODE (d1) == TEMPLATE_DECL |
2885 | && TREE_CODE (DECL_RESULT (d1)) == TYPE_DECL) | |
2886 | { | |
2887 | template = d1; | |
2888 | d1 = DECL_NAME (template); | |
2889 | context = DECL_CONTEXT (template); | |
2890 | } | |
5566b478 MS |
2891 | else |
2892 | my_friendly_abort (272); | |
8d08fdba | 2893 | |
2c73f9f5 ML |
2894 | /* A namespace is used as context only for mangling. |
2895 | Template IDs with namespace context are found | |
2896 | in the global binding level. */ | |
2897 | if (context != NULL_TREE && TREE_CODE (context) == NAMESPACE_DECL) | |
2898 | context = global_namespace; | |
2899 | ||
8d08fdba MS |
2900 | /* With something like `template <class T> class X class X { ... };' |
2901 | we could end up with D1 having nothing but an IDENTIFIER_LOCAL_VALUE. | |
2902 | We don't want to do that, but we have to deal with the situation, so | |
2903 | let's give them some syntax errors to chew on instead of a crash. */ | |
2904 | if (! template) | |
2905 | return error_mark_node; | |
2c73f9f5 ML |
2906 | |
2907 | /* We need an id_context to get the mangling right. If this is a | |
2908 | nested template, use the context. If it is global, retrieve the | |
2909 | context from the template. */ | |
2910 | if (context && TREE_CODE (context) != NAMESPACE_DECL) | |
2911 | id_context = context; | |
2912 | else | |
2913 | id_context = DECL_CONTEXT (template); | |
2914 | my_friendly_assert (id_context != NULL_TREE, 980410); | |
2915 | ||
8d08fdba MS |
2916 | if (TREE_CODE (template) != TEMPLATE_DECL) |
2917 | { | |
2918 | cp_error ("non-template type `%T' used as a template", d1); | |
2919 | if (in_decl) | |
2920 | cp_error_at ("for template declaration `%D'", in_decl); | |
2921 | return error_mark_node; | |
2922 | } | |
8d08fdba | 2923 | |
73b0fce8 KL |
2924 | if (DECL_TEMPLATE_TEMPLATE_PARM_P (template)) |
2925 | { | |
2926 | /* Create a new TEMPLATE_DECL and TEMPLATE_TEMPLATE_PARM node to store | |
2927 | template arguments */ | |
2928 | ||
2929 | tree parm = copy_template_template_parm (TREE_TYPE (template)); | |
2930 | tree template2 = TYPE_STUB_DECL (parm); | |
2931 | tree arglist2; | |
2932 | ||
2933 | CLASSTYPE_GOT_SEMICOLON (parm) = 1; | |
2934 | parmlist = DECL_INNERMOST_TEMPLATE_PARMS (template); | |
2935 | ||
de575009 | 2936 | arglist2 = coerce_template_parms (parmlist, arglist, template, 1, 1, 0); |
73b0fce8 KL |
2937 | if (arglist2 == error_mark_node) |
2938 | return error_mark_node; | |
2939 | ||
2940 | arglist2 = copy_to_permanent (arglist2); | |
2941 | CLASSTYPE_TEMPLATE_INFO (parm) | |
2942 | = perm_tree_cons (template2, arglist2, NULL_TREE); | |
2943 | TYPE_SIZE (parm) = 0; | |
2944 | return parm; | |
2945 | } | |
e1467ff2 MM |
2946 | else if (PRIMARY_TEMPLATE_P (template) |
2947 | || (TREE_CODE (TYPE_CONTEXT (TREE_TYPE (template))) | |
2948 | == FUNCTION_DECL)) | |
8d08fdba | 2949 | { |
830bfa74 MM |
2950 | tree arglist_for_mangling; |
2951 | ||
98c1c668 | 2952 | parmlist = DECL_INNERMOST_TEMPLATE_PARMS (template); |
5566b478 | 2953 | |
830bfa74 MM |
2954 | if (/* ARGLIST can be NULL_TREE if there are default arguments. */ |
2955 | arglist != NULL_TREE | |
2956 | && TREE_CODE (arglist) == TREE_VEC | |
2957 | && TREE_VEC_LENGTH (arglist) > 1 | |
2958 | && list_length (DECL_TEMPLATE_PARMS (template)) > 1) | |
2959 | { | |
2960 | /* We have multiple levels of arguments to coerce, at once. */ | |
2961 | tree new_args = | |
2962 | make_tree_vec (list_length (DECL_TEMPLATE_PARMS (template))); | |
2963 | int i; | |
2964 | ||
2965 | for (i = TREE_VEC_LENGTH (arglist) - 1, | |
2966 | t = DECL_TEMPLATE_PARMS (template); | |
2967 | i >= 0 && t != NULL_TREE; | |
2968 | --i, t = TREE_CHAIN (t)) | |
2969 | TREE_VEC_ELT (new_args, i) = | |
2970 | coerce_template_parms (TREE_VALUE (t), | |
2971 | TREE_VEC_ELT (arglist, i), | |
2972 | template, 1, 1, 0); | |
2973 | arglist = new_args; | |
2974 | } | |
2975 | else | |
2976 | arglist = coerce_template_parms (parmlist, | |
2977 | innermost_args (arglist, 0), | |
2978 | template, 1, 1, 0); | |
2979 | if (arglist == error_mark_node) | |
5566b478 MS |
2980 | return error_mark_node; |
2981 | if (uses_template_parms (arglist)) | |
2982 | { | |
2983 | tree found; | |
2984 | if (comp_template_args | |
2985 | (CLASSTYPE_TI_ARGS (TREE_TYPE (template)), arglist)) | |
2986 | found = TREE_TYPE (template); | |
2987 | else | |
2988 | { | |
2989 | for (found = DECL_TEMPLATE_INSTANTIATIONS (template); | |
2990 | found; found = TREE_CHAIN (found)) | |
2991 | { | |
2992 | if (TI_USES_TEMPLATE_PARMS (found) | |
2993 | && comp_template_args (TREE_PURPOSE (found), arglist)) | |
2994 | break; | |
2995 | } | |
2996 | if (found) | |
2997 | found = TREE_VALUE (found); | |
2998 | } | |
2999 | ||
3000 | if (found) | |
3001 | { | |
3002 | if (can_free (&permanent_obstack, arglist)) | |
3003 | obstack_free (&permanent_obstack, arglist); | |
3004 | return found; | |
3005 | } | |
3006 | } | |
3007 | ||
830bfa74 MM |
3008 | if (TREE_CODE (arglist) == TREE_VEC) |
3009 | arglist_for_mangling = innermost_args (arglist, 0); | |
3010 | else | |
3011 | arglist_for_mangling = arglist; | |
3012 | ||
db897306 | 3013 | /* FIXME avoid duplication. */ |
8d08fdba | 3014 | mangled_name = mangle_class_name_for_template (IDENTIFIER_POINTER (d1), |
75650646 | 3015 | parmlist, |
830bfa74 | 3016 | arglist_for_mangling, |
2c73f9f5 | 3017 | id_context); |
8d08fdba | 3018 | id = get_identifier (mangled_name); |
5566b478 | 3019 | IDENTIFIER_TEMPLATE (id) = d1; |
8d08fdba | 3020 | |
5566b478 | 3021 | maybe_push_to_top_level (uses_template_parms (arglist)); |
fc378698 | 3022 | t = xref_tag_from_type (TREE_TYPE (template), id, 1); |
75650646 | 3023 | |
e1467ff2 | 3024 | if (context != NULL_TREE) |
75650646 MM |
3025 | { |
3026 | /* Set up the context for the type_decl correctly. Note | |
3027 | that we must clear DECL_ASSEMBLER_NAME to fool | |
3028 | build_overload_name into creating a new name. */ | |
3029 | tree type_decl = TYPE_STUB_DECL (t); | |
3030 | ||
e1467ff2 MM |
3031 | TYPE_CONTEXT (t) = context; |
3032 | DECL_CONTEXT (type_decl) = context; | |
75650646 MM |
3033 | DECL_ASSEMBLER_NAME (type_decl) = DECL_NAME (type_decl); |
3034 | DECL_ASSEMBLER_NAME (type_decl) = | |
3035 | get_identifier (build_overload_name (t, 1, 1)); | |
3036 | } | |
3037 | ||
5566b478 | 3038 | pop_from_top_level (); |
8926095f | 3039 | } |
5566b478 | 3040 | else |
8d08fdba | 3041 | { |
3ac3d9ea | 3042 | tree type_ctx = TYPE_CONTEXT (TREE_TYPE (template)); |
f7d98d58 | 3043 | tree args = tsubst (CLASSTYPE_TI_ARGS (type_ctx), arglist, in_decl); |
3ac3d9ea MM |
3044 | tree ctx = lookup_template_class (type_ctx, args, |
3045 | in_decl, NULL_TREE); | |
5566b478 MS |
3046 | id = d1; |
3047 | arglist = CLASSTYPE_TI_ARGS (ctx); | |
8d08fdba | 3048 | |
5566b478 | 3049 | if (TYPE_BEING_DEFINED (ctx) && ctx == current_class_type) |
8d08fdba | 3050 | { |
5156628f MS |
3051 | int save_temp = processing_template_decl; |
3052 | processing_template_decl = 0; | |
fc378698 | 3053 | t = xref_tag_from_type (TREE_TYPE (template), id, 0); |
5156628f | 3054 | processing_template_decl = save_temp; |
8d08fdba MS |
3055 | } |
3056 | else | |
3057 | { | |
5566b478 MS |
3058 | t = lookup_nested_type_by_name (ctx, id); |
3059 | my_friendly_assert (t != NULL_TREE, 42); | |
8d08fdba | 3060 | } |
5566b478 MS |
3061 | } |
3062 | ||
e92cc029 | 3063 | /* Seems to be wanted. */ |
5566b478 MS |
3064 | CLASSTYPE_GOT_SEMICOLON (t) = 1; |
3065 | ||
3066 | if (! CLASSTYPE_TEMPLATE_INFO (t)) | |
3067 | { | |
3068 | arglist = copy_to_permanent (arglist); | |
3069 | CLASSTYPE_TEMPLATE_INFO (t) | |
3070 | = perm_tree_cons (template, arglist, NULL_TREE); | |
3071 | DECL_TEMPLATE_INSTANTIATIONS (template) = perm_tree_cons | |
3072 | (arglist, t, DECL_TEMPLATE_INSTANTIATIONS (template)); | |
3073 | TI_USES_TEMPLATE_PARMS (DECL_TEMPLATE_INSTANTIATIONS (template)) | |
3074 | = uses_template_parms (arglist); | |
3075 | ||
3076 | SET_CLASSTYPE_IMPLICIT_INSTANTIATION (t); | |
3077 | ||
e92cc029 | 3078 | /* We need to set this again after CLASSTYPE_TEMPLATE_INFO is set up. */ |
5566b478 | 3079 | DECL_ASSEMBLER_NAME (TYPE_MAIN_DECL (t)) = id; |
aa09da44 | 3080 | if (! uses_template_parms (arglist)) |
5566b478 MS |
3081 | DECL_ASSEMBLER_NAME (TYPE_MAIN_DECL (t)) |
3082 | = get_identifier (build_overload_name (t, 1, 1)); | |
3083 | ||
3084 | if (flag_external_templates && ! uses_template_parms (arglist) | |
3085 | && CLASSTYPE_INTERFACE_KNOWN (TREE_TYPE (template)) | |
3086 | && ! CLASSTYPE_INTERFACE_ONLY (TREE_TYPE (template))) | |
e92cc029 | 3087 | add_pending_template (t); |
8d08fdba | 3088 | } |
8d08fdba | 3089 | |
5566b478 | 3090 | return t; |
8d08fdba MS |
3091 | } |
3092 | \f | |
51c184be | 3093 | /* Should be defined in parse.h. */ |
8d08fdba MS |
3094 | extern int yychar; |
3095 | ||
050367a3 MM |
3096 | /* For each TEMPLATE_TYPE_PARM, TEMPLATE_TEMPLATE_PARM, or |
3097 | TEMPLATE_PARM_INDEX in T, call FN with the parameter and the DATA. | |
3098 | If FN returns non-zero, the iteration is terminated, and | |
3099 | for_each_template_parm returns 1. Otherwise, the iteration | |
3100 | continues. If FN never returns a non-zero value, the value | |
3101 | returned by for_each_template_parm is 0. If FN is NULL, it is | |
3102 | considered to be the function which always returns 1. */ | |
3103 | ||
8d08fdba | 3104 | int |
050367a3 | 3105 | for_each_template_parm (t, fn, data) |
8d08fdba | 3106 | tree t; |
050367a3 MM |
3107 | tree_fn_t fn; |
3108 | void* data; | |
8d08fdba MS |
3109 | { |
3110 | if (!t) | |
3111 | return 0; | |
3112 | switch (TREE_CODE (t)) | |
3113 | { | |
3114 | case INDIRECT_REF: | |
3115 | case COMPONENT_REF: | |
3116 | /* We assume that the object must be instantiated in order to build | |
3117 | the COMPONENT_REF, so we test only whether the type of the | |
3118 | COMPONENT_REF uses template parms. */ | |
050367a3 | 3119 | return for_each_template_parm (TREE_TYPE (t), fn, data); |
8d08fdba MS |
3120 | |
3121 | case IDENTIFIER_NODE: | |
3122 | if (!IDENTIFIER_TEMPLATE (t)) | |
3123 | return 0; | |
5566b478 | 3124 | my_friendly_abort (42); |
8d08fdba MS |
3125 | |
3126 | /* aggregates of tree nodes */ | |
3127 | case TREE_VEC: | |
3128 | { | |
3129 | int i = TREE_VEC_LENGTH (t); | |
3130 | while (i--) | |
050367a3 | 3131 | if (for_each_template_parm (TREE_VEC_ELT (t, i), fn, data)) |
8d08fdba MS |
3132 | return 1; |
3133 | return 0; | |
3134 | } | |
3135 | case TREE_LIST: | |
050367a3 MM |
3136 | if (for_each_template_parm (TREE_PURPOSE (t), fn, data) |
3137 | || for_each_template_parm (TREE_VALUE (t), fn, data)) | |
8d08fdba | 3138 | return 1; |
050367a3 | 3139 | return for_each_template_parm (TREE_CHAIN (t), fn, data); |
8d08fdba | 3140 | |
2c73f9f5 ML |
3141 | case OVERLOAD: |
3142 | if (for_each_template_parm (OVL_FUNCTION (t), fn, data)) | |
3143 | return 1; | |
3144 | return for_each_template_parm (OVL_CHAIN (t), fn, data); | |
3145 | ||
8d08fdba MS |
3146 | /* constructed type nodes */ |
3147 | case POINTER_TYPE: | |
3148 | case REFERENCE_TYPE: | |
050367a3 | 3149 | return for_each_template_parm (TREE_TYPE (t), fn, data); |
8d08fdba | 3150 | case RECORD_TYPE: |
b7484fbe | 3151 | if (TYPE_PTRMEMFUNC_FLAG (t)) |
050367a3 MM |
3152 | return for_each_template_parm (TYPE_PTRMEMFUNC_FN_TYPE (t), |
3153 | fn, data); | |
8d08fdba | 3154 | case UNION_TYPE: |
5566b478 | 3155 | if (! CLASSTYPE_TEMPLATE_INFO (t)) |
8d08fdba | 3156 | return 0; |
050367a3 MM |
3157 | return for_each_template_parm (TREE_VALUE |
3158 | (CLASSTYPE_TEMPLATE_INFO (t)), | |
3159 | fn, data); | |
8d08fdba | 3160 | case FUNCTION_TYPE: |
050367a3 | 3161 | if (for_each_template_parm (TYPE_ARG_TYPES (t), fn, data)) |
8d08fdba | 3162 | return 1; |
050367a3 | 3163 | return for_each_template_parm (TREE_TYPE (t), fn, data); |
8d08fdba | 3164 | case ARRAY_TYPE: |
050367a3 | 3165 | if (for_each_template_parm (TYPE_DOMAIN (t), fn, data)) |
8d08fdba | 3166 | return 1; |
050367a3 | 3167 | return for_each_template_parm (TREE_TYPE (t), fn, data); |
8d08fdba | 3168 | case OFFSET_TYPE: |
050367a3 | 3169 | if (for_each_template_parm (TYPE_OFFSET_BASETYPE (t), fn, data)) |
8d08fdba | 3170 | return 1; |
050367a3 | 3171 | return for_each_template_parm (TREE_TYPE (t), fn, data); |
8d08fdba | 3172 | case METHOD_TYPE: |
050367a3 | 3173 | if (for_each_template_parm (TYPE_METHOD_BASETYPE (t), fn, data)) |
8d08fdba | 3174 | return 1; |
050367a3 | 3175 | if (for_each_template_parm (TYPE_ARG_TYPES (t), fn, data)) |
8d08fdba | 3176 | return 1; |
050367a3 | 3177 | return for_each_template_parm (TREE_TYPE (t), fn, data); |
8d08fdba MS |
3178 | |
3179 | /* decl nodes */ | |
3180 | case TYPE_DECL: | |
050367a3 | 3181 | return for_each_template_parm (TREE_TYPE (t), fn, data); |
5566b478 | 3182 | |
73b0fce8 KL |
3183 | case TEMPLATE_DECL: |
3184 | /* A template template parameter is encountered */ | |
3185 | if (DECL_TEMPLATE_TEMPLATE_PARM_P (t)) | |
3186 | /* We are parsing a template declaration */ | |
3187 | return 1; | |
3188 | /* We are instantiating templates with template template | |
3189 | parameter */ | |
3190 | return 0; | |
3191 | ||
3ac3d9ea | 3192 | case CONST_DECL: |
050367a3 | 3193 | if (for_each_template_parm (DECL_INITIAL (t), fn, data)) |
3ac3d9ea MM |
3194 | return 1; |
3195 | goto check_type_and_context; | |
3196 | ||
8d08fdba | 3197 | case FUNCTION_DECL: |
5566b478 MS |
3198 | case VAR_DECL: |
3199 | /* ??? What about FIELD_DECLs? */ | |
3200 | if (DECL_LANG_SPECIFIC (t) && DECL_TEMPLATE_INFO (t) | |
050367a3 | 3201 | && for_each_template_parm (DECL_TI_ARGS (t), fn, data)) |
8d08fdba MS |
3202 | return 1; |
3203 | /* fall through */ | |
8d08fdba | 3204 | case PARM_DECL: |
3ac3d9ea | 3205 | check_type_and_context: |
050367a3 | 3206 | if (for_each_template_parm (TREE_TYPE (t), fn, data)) |
5566b478 | 3207 | return 1; |
050367a3 MM |
3208 | if (DECL_CONTEXT (t) |
3209 | && for_each_template_parm (DECL_CONTEXT (t), fn, data)) | |
8d08fdba | 3210 | return 1; |
8d08fdba MS |
3211 | return 0; |
3212 | ||
3213 | case CALL_EXPR: | |
050367a3 | 3214 | return for_each_template_parm (TREE_TYPE (t), fn, data); |
8d08fdba | 3215 | case ADDR_EXPR: |
050367a3 | 3216 | return for_each_template_parm (TREE_OPERAND (t, 0), fn, data); |
8d08fdba MS |
3217 | |
3218 | /* template parm nodes */ | |
3219 | case TEMPLATE_TYPE_PARM: | |
73b0fce8 | 3220 | case TEMPLATE_TEMPLATE_PARM: |
f84b4be9 | 3221 | case TEMPLATE_PARM_INDEX: |
050367a3 MM |
3222 | if (fn) |
3223 | return (*fn)(t, data); | |
3224 | else | |
3225 | return 1; | |
8d08fdba MS |
3226 | |
3227 | /* simple type nodes */ | |
3228 | case INTEGER_TYPE: | |
050367a3 | 3229 | if (for_each_template_parm (TYPE_MIN_VALUE (t), fn, data)) |
8d08fdba | 3230 | return 1; |
050367a3 | 3231 | return for_each_template_parm (TYPE_MAX_VALUE (t), fn, data); |
8d08fdba MS |
3232 | |
3233 | case REAL_TYPE: | |
37c46b43 | 3234 | case COMPLEX_TYPE: |
8d08fdba | 3235 | case VOID_TYPE: |
2986ae00 | 3236 | case BOOLEAN_TYPE: |
2c73f9f5 | 3237 | case NAMESPACE_DECL: |
8d08fdba MS |
3238 | return 0; |
3239 | ||
85b71cf2 JM |
3240 | case ENUMERAL_TYPE: |
3241 | { | |
3242 | tree v; | |
3243 | ||
3244 | for (v = TYPE_VALUES (t); v != NULL_TREE; v = TREE_CHAIN (v)) | |
050367a3 | 3245 | if (for_each_template_parm (TREE_VALUE (v), fn, data)) |
85b71cf2 JM |
3246 | return 1; |
3247 | } | |
3248 | return 0; | |
3249 | ||
8d08fdba MS |
3250 | /* constants */ |
3251 | case INTEGER_CST: | |
3252 | case REAL_CST: | |
3253 | case STRING_CST: | |
3254 | return 0; | |
3255 | ||
3256 | case ERROR_MARK: | |
3257 | /* Non-error_mark_node ERROR_MARKs are bad things. */ | |
3258 | my_friendly_assert (t == error_mark_node, 274); | |
3259 | /* NOTREACHED */ | |
3260 | return 0; | |
3261 | ||
ec255269 | 3262 | case LOOKUP_EXPR: |
5566b478 | 3263 | case TYPENAME_TYPE: |
8d08fdba MS |
3264 | return 1; |
3265 | ||
5156628f | 3266 | case SCOPE_REF: |
050367a3 | 3267 | return for_each_template_parm (TREE_OPERAND (t, 0), fn, data); |
5156628f | 3268 | |
db5ae43f MS |
3269 | case CONSTRUCTOR: |
3270 | if (TREE_TYPE (t) && TYPE_PTRMEMFUNC_P (TREE_TYPE (t))) | |
050367a3 MM |
3271 | return for_each_template_parm (TYPE_PTRMEMFUNC_FN_TYPE |
3272 | (TREE_TYPE (t)), fn, data); | |
3273 | return for_each_template_parm (TREE_OPERAND (t, 1), fn, data); | |
db5ae43f | 3274 | |
42976354 BK |
3275 | case MODOP_EXPR: |
3276 | case CAST_EXPR: | |
3277 | case REINTERPRET_CAST_EXPR: | |
3278 | case CONST_CAST_EXPR: | |
3279 | case STATIC_CAST_EXPR: | |
3280 | case DYNAMIC_CAST_EXPR: | |
42976354 BK |
3281 | case ARROW_EXPR: |
3282 | case DOTSTAR_EXPR: | |
3283 | case TYPEID_EXPR: | |
3284 | return 1; | |
3285 | ||
abff8e06 JM |
3286 | case SIZEOF_EXPR: |
3287 | case ALIGNOF_EXPR: | |
050367a3 | 3288 | return for_each_template_parm (TREE_OPERAND (t, 0), fn, data); |
abff8e06 | 3289 | |
8d08fdba MS |
3290 | default: |
3291 | switch (TREE_CODE_CLASS (TREE_CODE (t))) | |
3292 | { | |
3293 | case '1': | |
3294 | case '2': | |
ec255269 | 3295 | case 'e': |
8d08fdba MS |
3296 | case '<': |
3297 | { | |
3298 | int i; | |
3299 | for (i = tree_code_length[(int) TREE_CODE (t)]; --i >= 0;) | |
050367a3 | 3300 | if (for_each_template_parm (TREE_OPERAND (t, i), fn, data)) |
8d08fdba MS |
3301 | return 1; |
3302 | return 0; | |
3303 | } | |
3304 | default: | |
3305 | break; | |
3306 | } | |
3307 | sorry ("testing %s for template parms", | |
3308 | tree_code_name [(int) TREE_CODE (t)]); | |
3309 | my_friendly_abort (82); | |
3310 | /* NOTREACHED */ | |
3311 | return 0; | |
3312 | } | |
3313 | } | |
3314 | ||
050367a3 MM |
3315 | int |
3316 | uses_template_parms (t) | |
3317 | tree t; | |
3318 | { | |
3319 | return for_each_template_parm (t, 0, 0); | |
3320 | } | |
3321 | ||
27fafc8d JM |
3322 | static struct tinst_level *current_tinst_level; |
3323 | static struct tinst_level *free_tinst_level; | |
3324 | static int tinst_depth; | |
e9f32eb5 | 3325 | extern int max_tinst_depth; |
5566b478 | 3326 | #ifdef GATHER_STATISTICS |
27fafc8d | 3327 | int depth_reached; |
5566b478 | 3328 | #endif |
27fafc8d JM |
3329 | int tinst_level_tick; |
3330 | int last_template_error_tick; | |
8d08fdba | 3331 | |
7bae46f4 | 3332 | /* Print out all the template instantiations that we are currently |
27fafc8d JM |
3333 | working on. If ERR, we are being called from cp_thing, so do |
3334 | the right thing for an error message. */ | |
7bae46f4 | 3335 | |
27fafc8d JM |
3336 | static void |
3337 | print_template_context (err) | |
3338 | int err; | |
7bae46f4 JM |
3339 | { |
3340 | struct tinst_level *p = current_tinst_level; | |
3341 | int line = lineno; | |
3342 | char *file = input_filename; | |
3343 | ||
27fafc8d JM |
3344 | if (err) |
3345 | { | |
3346 | if (current_function_decl == p->decl) | |
3347 | /* Avoid redundancy with the the "In function" line. */; | |
3348 | else if (current_function_decl == NULL_TREE) | |
038fb86f JM |
3349 | fprintf (stderr, "In instantiation of `%s':\n", |
3350 | decl_as_string (p->decl, 0)); | |
27fafc8d JM |
3351 | else |
3352 | my_friendly_abort (980521); | |
3353 | ||
3354 | if (p) | |
3355 | { | |
038fb86f JM |
3356 | line = p->line; |
3357 | file = p->file; | |
27fafc8d JM |
3358 | p = p->next; |
3359 | } | |
3360 | } | |
3361 | ||
3362 | next: | |
7bae46f4 JM |
3363 | for (; p; p = p->next) |
3364 | { | |
038fb86f JM |
3365 | fprintf (stderr, "%s:%d: instantiated from `%s'\n", file, line, |
3366 | decl_as_string (p->decl, 0)); | |
3367 | line = p->line; | |
3368 | file = p->file; | |
7bae46f4 | 3369 | } |
038fb86f | 3370 | fprintf (stderr, "%s:%d: instantiated from here\n", file, line); |
7bae46f4 JM |
3371 | } |
3372 | ||
27fafc8d JM |
3373 | /* Called from cp_thing to print the template context for an error. */ |
3374 | ||
3375 | void | |
3376 | maybe_print_template_context () | |
3377 | { | |
3378 | if (last_template_error_tick == tinst_level_tick | |
3379 | || current_tinst_level == 0) | |
3380 | return; | |
3381 | ||
3382 | last_template_error_tick = tinst_level_tick; | |
3383 | print_template_context (1); | |
3384 | } | |
3385 | ||
bd6dd845 | 3386 | static int |
5566b478 MS |
3387 | push_tinst_level (d) |
3388 | tree d; | |
8d08fdba MS |
3389 | { |
3390 | struct tinst_level *new; | |
8d08fdba | 3391 | |
7215f9a0 MS |
3392 | if (tinst_depth >= max_tinst_depth) |
3393 | { | |
8adf5b5e JM |
3394 | /* If the instantiation in question still has unbound template parms, |
3395 | we don't really care if we can't instantiate it, so just return. | |
3396 | This happens with base instantiation for implicit `typename'. */ | |
3397 | if (uses_template_parms (d)) | |
3398 | return 0; | |
3399 | ||
7215f9a0 MS |
3400 | error ("template instantiation depth exceeds maximum of %d", |
3401 | max_tinst_depth); | |
e9f32eb5 | 3402 | error (" (use -ftemplate-depth-NN to increase the maximum)"); |
5566b478 MS |
3403 | cp_error (" instantiating `%D'", d); |
3404 | ||
27fafc8d | 3405 | print_template_context (0); |
5566b478 | 3406 | |
7215f9a0 MS |
3407 | return 0; |
3408 | } | |
3409 | ||
8d08fdba MS |
3410 | if (free_tinst_level) |
3411 | { | |
3412 | new = free_tinst_level; | |
3413 | free_tinst_level = new->next; | |
3414 | } | |
3415 | else | |
3416 | new = (struct tinst_level *) xmalloc (sizeof (struct tinst_level)); | |
3417 | ||
5566b478 MS |
3418 | new->decl = d; |
3419 | new->line = lineno; | |
3420 | new->file = input_filename; | |
8d08fdba MS |
3421 | new->next = current_tinst_level; |
3422 | current_tinst_level = new; | |
5566b478 | 3423 | |
7215f9a0 | 3424 | ++tinst_depth; |
5566b478 MS |
3425 | #ifdef GATHER_STATISTICS |
3426 | if (tinst_depth > depth_reached) | |
3427 | depth_reached = tinst_depth; | |
3428 | #endif | |
3429 | ||
27fafc8d | 3430 | ++tinst_level_tick; |
7215f9a0 | 3431 | return 1; |
8d08fdba MS |
3432 | } |
3433 | ||
3434 | void | |
3435 | pop_tinst_level () | |
3436 | { | |
3437 | struct tinst_level *old = current_tinst_level; | |
3438 | ||
3439 | current_tinst_level = old->next; | |
3440 | old->next = free_tinst_level; | |
3441 | free_tinst_level = old; | |
7215f9a0 | 3442 | --tinst_depth; |
27fafc8d | 3443 | ++tinst_level_tick; |
8d08fdba MS |
3444 | } |
3445 | ||
3446 | struct tinst_level * | |
3447 | tinst_for_decl () | |
3448 | { | |
3449 | struct tinst_level *p = current_tinst_level; | |
3450 | ||
3451 | if (p) | |
3452 | for (; p->next ; p = p->next ) | |
3453 | ; | |
3454 | return p; | |
3455 | } | |
3456 | ||
f84b4be9 JM |
3457 | /* DECL is a friend FUNCTION_DECL or TEMPLATE_DECL. ARGS is the |
3458 | vector of template arguments, as for tsubst. | |
3459 | ||
3460 | Returns an appropriate tsbust'd friend declaration. */ | |
3461 | ||
3462 | static tree | |
3463 | tsubst_friend_function (decl, args) | |
3464 | tree decl; | |
3465 | tree args; | |
3466 | { | |
3467 | tree new_friend; | |
27fafc8d JM |
3468 | int line = lineno; |
3469 | char *file = input_filename; | |
3470 | ||
3471 | lineno = DECL_SOURCE_LINE (decl); | |
3472 | input_filename = DECL_SOURCE_FILE (decl); | |
3473 | ||
f84b4be9 JM |
3474 | if (TREE_CODE (decl) == FUNCTION_DECL |
3475 | && DECL_TEMPLATE_INSTANTIATION (decl) | |
3476 | && TREE_CODE (DECL_TI_TEMPLATE (decl)) != TEMPLATE_DECL) | |
3477 | /* This was a friend declared with an explicit template | |
3478 | argument list, e.g.: | |
3479 | ||
3480 | friend void f<>(T); | |
3481 | ||
3482 | to indicate that f was a template instantiation, not a new | |
3483 | function declaration. Now, we have to figure out what | |
3484 | instantiation of what template. */ | |
3485 | { | |
3486 | tree template_id; | |
3487 | tree new_args; | |
3488 | tree tmpl; | |
3489 | tree tinfo; | |
3490 | ||
3491 | template_id | |
3492 | = lookup_template_function (tsubst_expr (DECL_TI_TEMPLATE (decl), | |
f7d98d58 | 3493 | args, NULL_TREE), |
f84b4be9 | 3494 | tsubst (DECL_TI_ARGS (decl), |
f7d98d58 | 3495 | args, NULL_TREE)); |
f84b4be9 JM |
3496 | |
3497 | /* Temporarily remove the DECL_TEMPLATE_INFO so as not to | |
3498 | confuse tsubst. */ | |
3499 | tinfo = DECL_TEMPLATE_INFO (decl); | |
3500 | DECL_TEMPLATE_INFO (decl) = NULL_TREE; | |
f7d98d58 | 3501 | new_friend = tsubst (decl, args, NULL_TREE); |
f84b4be9 JM |
3502 | DECL_TEMPLATE_INFO (decl) = tinfo; |
3503 | ||
3504 | tmpl = determine_specialization (template_id, | |
3505 | new_friend, | |
3506 | &new_args, | |
3507 | 0, 1); | |
27fafc8d JM |
3508 | new_friend = instantiate_template (tmpl, new_args); |
3509 | goto done; | |
f84b4be9 | 3510 | } |
27fafc8d JM |
3511 | else |
3512 | new_friend = tsubst (decl, args, NULL_TREE); | |
f84b4be9 JM |
3513 | |
3514 | /* The new_friend will look like an instantiation, to the | |
3515 | compiler, but is not an instantiation from the point of view of | |
3516 | the language. For example, we might have had: | |
3517 | ||
3518 | template <class T> struct S { | |
3519 | template <class U> friend void f(T, U); | |
3520 | }; | |
3521 | ||
3522 | Then, in S<int>, template <class U> void f(int, U) is not an | |
3523 | instantiation of anything. */ | |
3524 | DECL_USE_TEMPLATE (new_friend) = 0; | |
3525 | if (TREE_CODE (decl) == TEMPLATE_DECL) | |
3526 | DECL_USE_TEMPLATE (DECL_TEMPLATE_RESULT (new_friend)) = 0; | |
3527 | ||
6eb3bb27 | 3528 | if (DECL_NAMESPACE_SCOPE_P (new_friend)) |
f84b4be9 JM |
3529 | { |
3530 | if (TREE_CODE (new_friend) == TEMPLATE_DECL) | |
3531 | /* This declaration is a `primary' template. */ | |
3532 | TREE_TYPE (DECL_INNERMOST_TEMPLATE_PARMS (new_friend)) | |
3533 | = new_friend; | |
3534 | ||
2c73f9f5 | 3535 | new_friend = pushdecl_namespace_level (new_friend); |
f84b4be9 JM |
3536 | } |
3537 | else if (TYPE_SIZE (DECL_CONTEXT (new_friend))) | |
3538 | { | |
3539 | /* Check to see that the declaration is really present, and, | |
3540 | possibly obtain an improved declaration. */ | |
3541 | tree fn = check_classfn (DECL_CONTEXT (new_friend), | |
3542 | new_friend); | |
3543 | ||
3544 | if (fn) | |
3545 | new_friend = fn; | |
3546 | } | |
3547 | ||
27fafc8d JM |
3548 | done: |
3549 | lineno = line; | |
3550 | input_filename = file; | |
f84b4be9 JM |
3551 | return new_friend; |
3552 | } | |
3553 | ||
6757edfe MM |
3554 | /* FRIEND_TYPE is a friend RECORD_TYPE or UNION_TYPE. ARGS is the |
3555 | vector of template arguments, as for tsubst. | |
3556 | ||
3557 | Returns an appropriate tsbust'd friend type. */ | |
3558 | ||
3559 | static tree | |
3560 | tsubst_friend_class (friend_type, args) | |
3561 | tree friend_type; | |
3562 | tree args; | |
3563 | { | |
f9c3243c JM |
3564 | tree friend_tmpl = CLASSTYPE_TI_TEMPLATE (friend_type); |
3565 | tree tmpl = lookup_name (DECL_NAME (friend_tmpl), 1); | |
6757edfe MM |
3566 | |
3567 | tmpl = maybe_get_template_decl_from_type_decl (tmpl); | |
3568 | ||
3569 | if (tmpl != NULL_TREE && DECL_CLASS_TEMPLATE_P (tmpl)) | |
3570 | { | |
3571 | /* The friend template has already been declared. Just | |
3572 | check to see that the declarations match. */ | |
f9c3243c JM |
3573 | if (tmpl != friend_tmpl) |
3574 | redeclare_class_template (TREE_TYPE (tmpl), | |
3575 | DECL_TEMPLATE_PARMS (friend_tmpl)); | |
6757edfe MM |
3576 | friend_type = TREE_TYPE (tmpl); |
3577 | } | |
3578 | else | |
3579 | { | |
3580 | /* The friend template has not already been declared. In this | |
3581 | case, the instantiation of the template class will cause the | |
3582 | injection of this template into the global scope. */ | |
f9c3243c | 3583 | tmpl = tsubst (friend_tmpl, args, NULL_TREE); |
6757edfe MM |
3584 | |
3585 | /* The new TMPL is not an instantiation of anything, so we | |
3586 | forget its origins. We don't reset CLASSTYPE_TI_TEMPLATE for | |
3587 | the new type because that is supposed to be the corresponding | |
3588 | template decl, i.e., TMPL. */ | |
3589 | DECL_USE_TEMPLATE (tmpl) = 0; | |
3590 | DECL_TEMPLATE_INFO (tmpl) = NULL_TREE; | |
3591 | CLASSTYPE_USE_TEMPLATE (TREE_TYPE (tmpl)) = 0; | |
3592 | ||
3593 | /* Inject this template into the global scope. */ | |
3594 | friend_type = TREE_TYPE (pushdecl_top_level (tmpl)); | |
3595 | } | |
3596 | ||
3597 | return friend_type; | |
3598 | } | |
f84b4be9 | 3599 | |
8d08fdba | 3600 | tree |
5566b478 MS |
3601 | instantiate_class_template (type) |
3602 | tree type; | |
8d08fdba | 3603 | { |
fc378698 | 3604 | tree template, template_info, args, pattern, t, *field_chain; |
8d019cef | 3605 | tree typedecl, outer_args; |
8d08fdba | 3606 | |
5566b478 | 3607 | if (type == error_mark_node) |
8d08fdba MS |
3608 | return error_mark_node; |
3609 | ||
5566b478 MS |
3610 | template_info = CLASSTYPE_TEMPLATE_INFO (type); |
3611 | ||
3612 | if (TYPE_BEING_DEFINED (type) || TYPE_SIZE (type)) | |
3613 | return type; | |
3614 | ||
3615 | template = TI_TEMPLATE (template_info); | |
3616 | my_friendly_assert (TREE_CODE (template) == TEMPLATE_DECL, 279); | |
3617 | args = TI_ARGS (template_info); | |
73aad9b9 | 3618 | |
93cdc044 JM |
3619 | if (DECL_TEMPLATE_INFO (template)) |
3620 | { | |
8d019cef | 3621 | outer_args = DECL_TI_ARGS (template); |
93cdc044 JM |
3622 | while (DECL_TEMPLATE_INFO (template)) |
3623 | template = DECL_TI_TEMPLATE (template); | |
3624 | } | |
8d019cef JM |
3625 | else |
3626 | outer_args = NULL_TREE; | |
93cdc044 | 3627 | |
73aad9b9 | 3628 | t = most_specialized_class |
8d019cef | 3629 | (DECL_TEMPLATE_SPECIALIZATIONS (template), args, outer_args); |
73aad9b9 JM |
3630 | |
3631 | if (t == error_mark_node) | |
3632 | { | |
3633 | char *str = "candidates are:"; | |
3634 | cp_error ("ambiguous class template instantiation for `%#T'", type); | |
3635 | for (t = DECL_TEMPLATE_SPECIALIZATIONS (template); t; t = TREE_CHAIN (t)) | |
3636 | { | |
8d019cef JM |
3637 | if (get_class_bindings (TREE_VALUE (t), TREE_PURPOSE (t), |
3638 | args, outer_args)) | |
73aad9b9 JM |
3639 | { |
3640 | cp_error_at ("%s %+#T", str, TREE_TYPE (t)); | |
3641 | str = " "; | |
3642 | } | |
3643 | } | |
3644 | TYPE_BEING_DEFINED (type) = 1; | |
de22184b | 3645 | return error_mark_node; |
73aad9b9 JM |
3646 | } |
3647 | else if (t) | |
3648 | pattern = TREE_TYPE (t); | |
3649 | else | |
3650 | pattern = TREE_TYPE (template); | |
5566b478 MS |
3651 | |
3652 | if (TYPE_SIZE (pattern) == NULL_TREE) | |
ec255269 | 3653 | return type; |
5566b478 | 3654 | |
73aad9b9 | 3655 | if (t) |
8d019cef JM |
3656 | args = get_class_bindings (TREE_VALUE (t), TREE_PURPOSE (t), |
3657 | args, outer_args); | |
3658 | ||
8adf5b5e JM |
3659 | if (pedantic && uses_template_parms (args)) |
3660 | /* If there are still template parameters amongst the args, then | |
3661 | we can't instantiate the type; there's no telling whether or not one | |
3662 | of the template parameters might eventually be instantiated to some | |
3663 | value that results in a specialization being used. */ | |
3664 | return type; | |
3665 | ||
b4c4a9ec MM |
3666 | /* We must copy the arguments to the permanent obstack since |
3667 | during the tsubst'ing below they may wind up in the | |
3668 | DECL_TI_ARGS of some instantiated member template. */ | |
3669 | args = copy_to_permanent (args); | |
3670 | ||
5566b478 MS |
3671 | TYPE_BEING_DEFINED (type) = 1; |
3672 | ||
3673 | if (! push_tinst_level (type)) | |
3674 | return type; | |
8d08fdba | 3675 | |
5566b478 MS |
3676 | maybe_push_to_top_level (uses_template_parms (type)); |
3677 | pushclass (type, 0); | |
3678 | ||
db897306 JM |
3679 | if (outer_args) |
3680 | args = add_to_template_args (outer_args, args); | |
3681 | ||
5566b478 MS |
3682 | if (flag_external_templates) |
3683 | { | |
3684 | if (flag_alt_external_templates) | |
3685 | { | |
3686 | CLASSTYPE_INTERFACE_ONLY (type) = interface_only; | |
3687 | SET_CLASSTYPE_INTERFACE_UNKNOWN_X (type, interface_unknown); | |
3688 | CLASSTYPE_VTABLE_NEEDS_WRITING (type) | |
2604412d JM |
3689 | = (! CLASSTYPE_INTERFACE_ONLY (type) |
3690 | && CLASSTYPE_INTERFACE_KNOWN (type)); | |
5566b478 MS |
3691 | } |
3692 | else | |
3693 | { | |
3694 | CLASSTYPE_INTERFACE_ONLY (type) = CLASSTYPE_INTERFACE_ONLY (pattern); | |
3695 | SET_CLASSTYPE_INTERFACE_UNKNOWN_X | |
3696 | (type, CLASSTYPE_INTERFACE_UNKNOWN (pattern)); | |
3697 | CLASSTYPE_VTABLE_NEEDS_WRITING (type) | |
2604412d JM |
3698 | = (! CLASSTYPE_INTERFACE_ONLY (type) |
3699 | && CLASSTYPE_INTERFACE_KNOWN (type)); | |
5566b478 MS |
3700 | } |
3701 | } | |
3702 | else | |
8d08fdba | 3703 | { |
5566b478 MS |
3704 | SET_CLASSTYPE_INTERFACE_UNKNOWN (type); |
3705 | CLASSTYPE_VTABLE_NEEDS_WRITING (type) = 1; | |
8d08fdba MS |
3706 | } |
3707 | ||
f7da6097 MS |
3708 | TYPE_HAS_CONSTRUCTOR (type) = TYPE_HAS_CONSTRUCTOR (pattern); |
3709 | TYPE_HAS_DESTRUCTOR (type) = TYPE_HAS_DESTRUCTOR (pattern); | |
3710 | TYPE_HAS_ASSIGNMENT (type) = TYPE_HAS_ASSIGNMENT (pattern); | |
3711 | TYPE_OVERLOADS_CALL_EXPR (type) = TYPE_OVERLOADS_CALL_EXPR (pattern); | |
3712 | TYPE_OVERLOADS_ARRAY_REF (type) = TYPE_OVERLOADS_ARRAY_REF (pattern); | |
3713 | TYPE_OVERLOADS_ARROW (type) = TYPE_OVERLOADS_ARROW (pattern); | |
3714 | TYPE_GETS_NEW (type) = TYPE_GETS_NEW (pattern); | |
3715 | TYPE_GETS_DELETE (type) = TYPE_GETS_DELETE (pattern); | |
3716 | TYPE_VEC_DELETE_TAKES_SIZE (type) = TYPE_VEC_DELETE_TAKES_SIZE (pattern); | |
3717 | TYPE_HAS_ASSIGN_REF (type) = TYPE_HAS_ASSIGN_REF (pattern); | |
3718 | TYPE_HAS_CONST_ASSIGN_REF (type) = TYPE_HAS_CONST_ASSIGN_REF (pattern); | |
3719 | TYPE_HAS_ABSTRACT_ASSIGN_REF (type) = TYPE_HAS_ABSTRACT_ASSIGN_REF (pattern); | |
3720 | TYPE_HAS_INIT_REF (type) = TYPE_HAS_INIT_REF (pattern); | |
3721 | TYPE_HAS_CONST_INIT_REF (type) = TYPE_HAS_CONST_INIT_REF (pattern); | |
f7da6097 MS |
3722 | TYPE_HAS_DEFAULT_CONSTRUCTOR (type) = TYPE_HAS_DEFAULT_CONSTRUCTOR (pattern); |
3723 | TYPE_HAS_CONVERSION (type) = TYPE_HAS_CONVERSION (pattern); | |
3724 | TYPE_USES_COMPLEX_INHERITANCE (type) | |
3725 | = TYPE_USES_COMPLEX_INHERITANCE (pattern); | |
3726 | TYPE_USES_MULTIPLE_INHERITANCE (type) | |
3727 | = TYPE_USES_MULTIPLE_INHERITANCE (pattern); | |
3728 | TYPE_USES_VIRTUAL_BASECLASSES (type) | |
3729 | = TYPE_USES_VIRTUAL_BASECLASSES (pattern); | |
3730 | TYPE_PACKED (type) = TYPE_PACKED (pattern); | |
3731 | TYPE_ALIGN (type) = TYPE_ALIGN (pattern); | |
3732 | ||
2604412d JM |
3733 | CLASSTYPE_LOCAL_TYPEDECLS (type) = CLASSTYPE_LOCAL_TYPEDECLS (pattern); |
3734 | ||
3735 | /* If this is a partial instantiation, don't tsubst anything. We will | |
3736 | only use this type for implicit typename, so the actual contents don't | |
3737 | matter. All that matters is whether a particular name is a type. */ | |
3738 | if (uses_template_parms (type)) | |
3739 | { | |
3740 | TYPE_BINFO_BASETYPES (type) = TYPE_BINFO_BASETYPES (pattern); | |
3741 | TYPE_FIELDS (type) = TYPE_FIELDS (pattern); | |
3742 | TYPE_METHODS (type) = TYPE_METHODS (pattern); | |
3743 | CLASSTYPE_TAGS (type) = CLASSTYPE_TAGS (pattern); | |
3744 | TYPE_SIZE (type) = integer_zero_node; | |
3745 | goto end; | |
3746 | } | |
3747 | ||
5566b478 MS |
3748 | { |
3749 | tree binfo = TYPE_BINFO (type); | |
3750 | tree pbases = TYPE_BINFO_BASETYPES (pattern); | |
3751 | ||
3752 | if (pbases) | |
3753 | { | |
3754 | tree bases; | |
3755 | int i; | |
3756 | int len = TREE_VEC_LENGTH (pbases); | |
de22184b | 3757 | bases = make_tree_vec (len); |
5566b478 MS |
3758 | for (i = 0; i < len; ++i) |
3759 | { | |
3760 | tree elt; | |
3761 | ||
3762 | TREE_VEC_ELT (bases, i) = elt | |
f7d98d58 | 3763 | = tsubst (TREE_VEC_ELT (pbases, i), args, NULL_TREE); |
5566b478 MS |
3764 | BINFO_INHERITANCE_CHAIN (elt) = binfo; |
3765 | ||
6633d636 MS |
3766 | if (! IS_AGGR_TYPE (TREE_TYPE (elt))) |
3767 | cp_error | |
3768 | ("base type `%T' of `%T' fails to be a struct or class type", | |
3769 | TREE_TYPE (elt), type); | |
2604412d | 3770 | else if (TYPE_SIZE (complete_type (TREE_TYPE (elt))) == NULL_TREE) |
5566b478 MS |
3771 | cp_error ("base class `%T' of `%T' has incomplete type", |
3772 | TREE_TYPE (elt), type); | |
3773 | } | |
de22184b MS |
3774 | /* Don't initialize this until the vector is filled out, or |
3775 | lookups will crash. */ | |
3776 | BINFO_BASETYPES (binfo) = bases; | |
5566b478 MS |
3777 | } |
3778 | } | |
3779 | ||
5566b478 | 3780 | field_chain = &TYPE_FIELDS (type); |
5566b478 MS |
3781 | |
3782 | for (t = CLASSTYPE_TAGS (pattern); t; t = TREE_CHAIN (t)) | |
8d08fdba | 3783 | { |
5566b478 | 3784 | tree tag = TREE_VALUE (t); |
5566b478 | 3785 | |
fc378698 | 3786 | /* These will add themselves to CLASSTYPE_TAGS for the new type. */ |
5566b478 | 3787 | if (TREE_CODE (tag) == ENUMERAL_TYPE) |
8d08fdba | 3788 | { |
56c5d8bf | 3789 | (void) tsubst_enum (tag, args, field_chain); |
5566b478 | 3790 | while (*field_chain) |
37c46b43 MS |
3791 | { |
3792 | DECL_FIELD_CONTEXT (*field_chain) = type; | |
3793 | field_chain = &TREE_CHAIN (*field_chain); | |
3794 | } | |
8d08fdba | 3795 | } |
b87692e5 | 3796 | else |
f7d98d58 | 3797 | tsubst (tag, args, NULL_TREE); |
8d08fdba MS |
3798 | } |
3799 | ||
5566b478 MS |
3800 | /* Don't replace enum constants here. */ |
3801 | for (t = TYPE_FIELDS (pattern); t; t = TREE_CHAIN (t)) | |
3802 | if (TREE_CODE (t) != CONST_DECL) | |
3803 | { | |
f7d98d58 | 3804 | tree r = tsubst (t, args, NULL_TREE); |
5566b478 MS |
3805 | if (TREE_CODE (r) == VAR_DECL) |
3806 | { | |
2604412d JM |
3807 | pending_statics = perm_tree_cons (NULL_TREE, r, pending_statics); |
3808 | /* Perhaps we should do more of grokfield here. */ | |
5566b478 MS |
3809 | start_decl_1 (r); |
3810 | DECL_IN_AGGR_P (r) = 1; | |
3811 | DECL_EXTERNAL (r) = 1; | |
3812 | cp_finish_decl (r, DECL_INITIAL (r), NULL_TREE, 0, 0); | |
3813 | } | |
3814 | ||
3815 | *field_chain = r; | |
3816 | field_chain = &TREE_CHAIN (r); | |
3817 | } | |
8d08fdba | 3818 | |
5566b478 | 3819 | TYPE_METHODS (type) = tsubst_chain (TYPE_METHODS (pattern), args); |
f7da6097 MS |
3820 | for (t = TYPE_METHODS (type); t; t = TREE_CHAIN (t)) |
3821 | { | |
3822 | if (DECL_CONSTRUCTOR_P (t)) | |
3823 | grok_ctor_properties (type, t); | |
3824 | else if (IDENTIFIER_OPNAME_P (DECL_NAME (t))) | |
3825 | grok_op_properties (t, DECL_VIRTUAL_P (t), 0); | |
3826 | } | |
8d08fdba | 3827 | |
2604412d JM |
3828 | /* Construct the DECL_FRIENDLIST for the new class type. */ |
3829 | typedecl = TYPE_MAIN_DECL (type); | |
3830 | for (t = DECL_FRIENDLIST (TYPE_MAIN_DECL (pattern)); | |
3831 | t != NULL_TREE; | |
3832 | t = TREE_CHAIN (t)) | |
f84b4be9 | 3833 | { |
2604412d | 3834 | tree friends; |
f84b4be9 | 3835 | |
2604412d JM |
3836 | DECL_FRIENDLIST (typedecl) |
3837 | = tree_cons (TREE_PURPOSE (t), NULL_TREE, | |
3838 | DECL_FRIENDLIST (typedecl)); | |
f84b4be9 | 3839 | |
2604412d JM |
3840 | for (friends = TREE_VALUE (t); |
3841 | friends != NULL_TREE; | |
3842 | friends = TREE_CHAIN (friends)) | |
3843 | { | |
3844 | if (TREE_PURPOSE (friends) == error_mark_node) | |
f84b4be9 | 3845 | { |
2604412d JM |
3846 | TREE_VALUE (DECL_FRIENDLIST (typedecl)) |
3847 | = tree_cons (error_mark_node, | |
3848 | tsubst_friend_function (TREE_VALUE (friends), | |
3849 | args), | |
3850 | TREE_VALUE (DECL_FRIENDLIST (typedecl))); | |
3851 | } | |
3852 | else | |
3853 | { | |
3854 | TREE_VALUE (DECL_FRIENDLIST (typedecl)) | |
3855 | = tree_cons (tsubst (TREE_PURPOSE (friends), args, NULL_TREE), | |
3856 | NULL_TREE, | |
3857 | TREE_VALUE (DECL_FRIENDLIST (typedecl))); | |
f84b4be9 JM |
3858 | |
3859 | } | |
3860 | } | |
2604412d | 3861 | } |
5566b478 | 3862 | |
6757edfe MM |
3863 | for (t = CLASSTYPE_FRIEND_CLASSES (pattern); |
3864 | t != NULL_TREE; | |
3865 | t = TREE_CHAIN (t)) | |
3866 | { | |
3867 | tree friend_type = TREE_VALUE (t); | |
3868 | ||
3869 | if (!CLASSTYPE_IS_TEMPLATE (friend_type)) | |
3870 | /* The call to xref_tag_from_type does injection for friend | |
3871 | classes. */ | |
3872 | friend_type = | |
3873 | xref_tag_from_type (tsubst (friend_type, args, NULL_TREE), | |
3874 | NULL_TREE, 1); | |
3875 | else | |
3876 | friend_type = tsubst_friend_class (friend_type, args); | |
fc378698 | 3877 | |
6757edfe MM |
3878 | CLASSTYPE_FRIEND_CLASSES (type) = |
3879 | tree_cons (NULL_TREE, friend_type, | |
3880 | CLASSTYPE_FRIEND_CLASSES (type)); | |
3881 | } | |
fc378698 | 3882 | |
2604412d JM |
3883 | /* This does injection for friend functions. */ |
3884 | if (!processing_template_decl) | |
3885 | { | |
3886 | t = tsubst (DECL_TEMPLATE_INJECT (template), args, NULL_TREE); | |
5566b478 | 3887 | |
2604412d JM |
3888 | for (; t; t = TREE_CHAIN (t)) |
3889 | { | |
3890 | tree d = TREE_VALUE (t); | |
fc378698 | 3891 | |
2604412d JM |
3892 | if (TREE_CODE (d) == TYPE_DECL) |
3893 | /* Already injected. */; | |
3894 | else | |
3895 | pushdecl (d); | |
3896 | } | |
3897 | } | |
5566b478 | 3898 | |
2604412d JM |
3899 | for (t = TYPE_FIELDS (type); t; t = TREE_CHAIN (t)) |
3900 | if (TREE_CODE (t) == FIELD_DECL) | |
3901 | { | |
3902 | TREE_TYPE (t) = complete_type (TREE_TYPE (t)); | |
3903 | require_complete_type (t); | |
3904 | } | |
5566b478 | 3905 | |
2604412d JM |
3906 | type = finish_struct_1 (type, 0); |
3907 | CLASSTYPE_GOT_SEMICOLON (type) = 1; | |
e92cc029 | 3908 | |
2604412d JM |
3909 | repo_template_used (type); |
3910 | if (at_eof && TYPE_BINFO_VTABLE (type) != NULL_TREE) | |
3911 | finish_prevtable_vardecl (NULL, TYPE_BINFO_VTABLE (type)); | |
8d08fdba | 3912 | |
2604412d | 3913 | end: |
5566b478 MS |
3914 | TYPE_BEING_DEFINED (type) = 0; |
3915 | popclass (0); | |
3916 | ||
3917 | pop_from_top_level (); | |
3918 | pop_tinst_level (); | |
3919 | ||
3920 | return type; | |
8d08fdba MS |
3921 | } |
3922 | ||
3923 | static int | |
3924 | list_eq (t1, t2) | |
3925 | tree t1, t2; | |
3926 | { | |
3927 | if (t1 == NULL_TREE) | |
3928 | return t2 == NULL_TREE; | |
3929 | if (t2 == NULL_TREE) | |
3930 | return 0; | |
3931 | /* Don't care if one declares its arg const and the other doesn't -- the | |
3932 | main variant of the arg type is all that matters. */ | |
3933 | if (TYPE_MAIN_VARIANT (TREE_VALUE (t1)) | |
3934 | != TYPE_MAIN_VARIANT (TREE_VALUE (t2))) | |
3935 | return 0; | |
3936 | return list_eq (TREE_CHAIN (t1), TREE_CHAIN (t2)); | |
3937 | } | |
3938 | ||
5566b478 | 3939 | tree |
8d08fdba MS |
3940 | lookup_nested_type_by_name (ctype, name) |
3941 | tree ctype, name; | |
3942 | { | |
3943 | tree t; | |
3944 | ||
5566b478 MS |
3945 | complete_type (ctype); |
3946 | ||
db5ae43f MS |
3947 | for (t = CLASSTYPE_TAGS (ctype); t; t = TREE_CHAIN (t)) |
3948 | { | |
f017f649 JM |
3949 | if (name == TREE_PURPOSE (t) |
3950 | /* this catches typedef enum { foo } bar; */ | |
3951 | || name == TYPE_IDENTIFIER (TREE_VALUE (t))) | |
db5ae43f MS |
3952 | return TREE_VALUE (t); |
3953 | } | |
8d08fdba MS |
3954 | return NULL_TREE; |
3955 | } | |
3956 | ||
00d3396f JM |
3957 | /* If arg is a non-type template parameter that does not depend on template |
3958 | arguments, fold it like we weren't in the body of a template. */ | |
3959 | ||
3960 | static tree | |
3961 | maybe_fold_nontype_arg (arg) | |
3962 | tree arg; | |
3963 | { | |
3964 | if (TREE_CODE_CLASS (TREE_CODE (arg)) != 't' | |
3965 | && !uses_template_parms (arg)) | |
3966 | { | |
3967 | /* Sometimes, one of the args was an expression involving a | |
3968 | template constant parameter, like N - 1. Now that we've | |
3969 | tsubst'd, we might have something like 2 - 1. This will | |
3970 | confuse lookup_template_class, so we do constant folding | |
3971 | here. We have to unset processing_template_decl, to | |
3972 | fool build_expr_from_tree() into building an actual | |
3973 | tree. */ | |
3974 | ||
3975 | int saved_processing_template_decl = processing_template_decl; | |
3976 | processing_template_decl = 0; | |
3977 | arg = fold (build_expr_from_tree (arg)); | |
3978 | processing_template_decl = saved_processing_template_decl; | |
3979 | } | |
3980 | return arg; | |
3981 | } | |
3982 | ||
a221d52f JM |
3983 | /* Return the TREE_VEC with the arguments for the innermost template header, |
3984 | where ARGS is either that or the VEC of VECs for all the arguments. | |
3985 | ||
3986 | If is_spec, then we are dealing with a specialization of a member | |
3987 | template, and want the second-innermost args, the innermost ones that | |
3988 | are instantiated. */ | |
3989 | ||
3990 | tree | |
3991 | innermost_args (args, is_spec) | |
3992 | tree args; | |
3993 | int is_spec; | |
3994 | { | |
830bfa74 | 3995 | if (args != NULL_TREE && TREE_CODE (TREE_VEC_ELT (args, 0)) == TREE_VEC) |
a221d52f JM |
3996 | return TREE_VEC_ELT (args, TREE_VEC_LENGTH (args) - 1 - is_spec); |
3997 | return args; | |
3998 | } | |
f84b4be9 | 3999 | |
830bfa74 MM |
4000 | /* Substitute ARGS into the vector of template arguments T. */ |
4001 | ||
4002 | tree | |
4003 | tsubst_template_arg_vector (t, args) | |
4004 | tree t; | |
4005 | tree args; | |
4006 | { | |
4007 | int len = TREE_VEC_LENGTH (t), need_new = 0, i; | |
4008 | tree *elts = (tree *) alloca (len * sizeof (tree)); | |
4009 | ||
4010 | bzero ((char *) elts, len * sizeof (tree)); | |
4011 | ||
4012 | for (i = 0; i < len; i++) | |
4013 | { | |
4014 | if (TREE_VEC_ELT (t, i) != NULL_TREE | |
4015 | && TREE_CODE (TREE_VEC_ELT (t, i)) == TREE_VEC) | |
4016 | elts[i] = tsubst_template_arg_vector (TREE_VEC_ELT (t, i), args); | |
4017 | else | |
4018 | elts[i] = maybe_fold_nontype_arg | |
4019 | (tsubst_expr (TREE_VEC_ELT (t, i), args, NULL_TREE)); | |
4020 | ||
4021 | if (elts[i] != TREE_VEC_ELT (t, i)) | |
4022 | need_new = 1; | |
4023 | } | |
4024 | ||
4025 | if (!need_new) | |
4026 | return t; | |
4027 | ||
4028 | t = make_tree_vec (len); | |
4029 | for (i = 0; i < len; i++) | |
4030 | TREE_VEC_ELT (t, i) = elts[i]; | |
4031 | ||
4032 | return t; | |
4033 | } | |
4034 | ||
00d3396f | 4035 | /* Take the tree structure T and replace template parameters used therein |
f7d98d58 JM |
4036 | with the argument vector ARGS. IN_DECL is an associated decl for |
4037 | diagnostics. | |
00d3396f JM |
4038 | |
4039 | tsubst is used for dealing with types, decls and the like; for | |
4040 | expressions, use tsubst_expr or tsubst_copy. */ | |
4041 | ||
75b0bbce | 4042 | tree |
f7d98d58 | 4043 | tsubst (t, args, in_decl) |
98c1c668 | 4044 | tree t, args; |
8d08fdba MS |
4045 | tree in_decl; |
4046 | { | |
4047 | tree type; | |
4048 | ||
5566b478 MS |
4049 | if (t == NULL_TREE || t == error_mark_node |
4050 | || t == integer_type_node | |
4051 | || t == void_type_node | |
2c73f9f5 ML |
4052 | || t == char_type_node |
4053 | || TREE_CODE (t) == NAMESPACE_DECL) | |
8d08fdba MS |
4054 | return t; |
4055 | ||
2c73f9f5 ML |
4056 | if (TREE_CODE (t) == IDENTIFIER_NODE) |
4057 | type = IDENTIFIER_TYPE_VALUE (t); | |
4058 | else | |
4059 | type = TREE_TYPE (t); | |
5566b478 MS |
4060 | if (type == unknown_type_node) |
4061 | my_friendly_abort (42); | |
830bfa74 | 4062 | |
824b9a4c | 4063 | if (type && TREE_CODE (t) != FUNCTION_DECL |
f84b4be9 | 4064 | && TREE_CODE (t) != TYPENAME_TYPE |
98134cad JM |
4065 | && TREE_CODE (t) != TEMPLATE_DECL |
4066 | && TREE_CODE (t) != IDENTIFIER_NODE) | |
f7d98d58 | 4067 | type = tsubst (type, args, in_decl); |
b7484fbe | 4068 | |
8d08fdba MS |
4069 | switch (TREE_CODE (t)) |
4070 | { | |
4071 | case RECORD_TYPE: | |
4072 | if (TYPE_PTRMEMFUNC_P (t)) | |
5566b478 MS |
4073 | { |
4074 | tree r = build_ptrmemfunc_type | |
f7d98d58 | 4075 | (tsubst (TYPE_PTRMEMFUNC_FN_TYPE (t), args, in_decl)); |
5566b478 MS |
4076 | return cp_build_type_variant (r, TYPE_READONLY (t), |
4077 | TYPE_VOLATILE (t)); | |
4078 | } | |
4079 | ||
8d08fdba | 4080 | /* else fall through */ |
5566b478 MS |
4081 | case UNION_TYPE: |
4082 | if (uses_template_parms (t)) | |
4083 | { | |
f7d98d58 | 4084 | tree argvec = tsubst (CLASSTYPE_TI_ARGS (t), args, in_decl); |
75650646 MM |
4085 | tree context; |
4086 | tree r; | |
4087 | ||
830bfa74 MM |
4088 | if (TYPE_CONTEXT (t) != NULL_TREE) |
4089 | { | |
4090 | context = tsubst (TYPE_CONTEXT (t), args, in_decl); | |
4091 | ||
4092 | if (TREE_CODE (context) != FUNCTION_DECL | |
4093 | && TREE_CODE (context) != NAMESPACE_DECL) | |
4094 | { | |
4095 | /* For a member class template, we need all the | |
4096 | template arguments. */ | |
4097 | if (CLASSTYPE_IS_TEMPLATE (TYPE_CONTEXT (t))) | |
4098 | argvec = | |
4099 | add_to_template_args (CLASSTYPE_TI_ARGS (context), | |
4100 | argvec); | |
4101 | ||
4102 | if (CLASSTYPE_TEMPLATE_INFO (context)) | |
4103 | argvec = | |
4104 | complete_template_args (CLASSTYPE_TI_TEMPLATE (context), | |
4105 | argvec, 0); | |
4106 | } | |
4107 | } | |
4108 | else | |
4109 | context = NULL_TREE; | |
75650646 MM |
4110 | |
4111 | r = lookup_template_class (t, argvec, in_decl, context); | |
4112 | ||
5566b478 | 4113 | return cp_build_type_variant (r, TYPE_READONLY (t), |
830bfa74 | 4114 | TYPE_VOLATILE (t)); |
5566b478 | 4115 | } |
8d08fdba | 4116 | |
5566b478 | 4117 | /* else fall through */ |
8d08fdba MS |
4118 | case ERROR_MARK: |
4119 | case IDENTIFIER_NODE: | |
4120 | case OP_IDENTIFIER: | |
4121 | case VOID_TYPE: | |
4122 | case REAL_TYPE: | |
37c46b43 | 4123 | case COMPLEX_TYPE: |
2986ae00 | 4124 | case BOOLEAN_TYPE: |
8d08fdba MS |
4125 | case INTEGER_CST: |
4126 | case REAL_CST: | |
4127 | case STRING_CST: | |
2c73f9f5 | 4128 | case NAMESPACE_DECL: |
8d08fdba MS |
4129 | return t; |
4130 | ||
5566b478 MS |
4131 | case ENUMERAL_TYPE: |
4132 | { | |
f7d98d58 | 4133 | tree ctx = tsubst (TYPE_CONTEXT (t), args, in_decl); |
2c73f9f5 | 4134 | if (ctx == NULL_TREE || TREE_CODE (ctx) == NAMESPACE_DECL) |
5566b478 | 4135 | return t; |
b87692e5 MS |
4136 | else if (ctx == current_function_decl) |
4137 | return lookup_name (TYPE_IDENTIFIER (t), 1); | |
5566b478 MS |
4138 | else |
4139 | return lookup_nested_type_by_name (ctx, TYPE_IDENTIFIER (t)); | |
4140 | } | |
4141 | ||
8d08fdba MS |
4142 | case INTEGER_TYPE: |
4143 | if (t == integer_type_node) | |
4144 | return t; | |
4145 | ||
4146 | if (TREE_CODE (TYPE_MIN_VALUE (t)) == INTEGER_CST | |
4147 | && TREE_CODE (TYPE_MAX_VALUE (t)) == INTEGER_CST) | |
4148 | return t; | |
5566b478 MS |
4149 | |
4150 | { | |
37c46b43 | 4151 | tree max = TREE_OPERAND (TYPE_MAX_VALUE (t), 0); |
f7d98d58 | 4152 | max = tsubst_expr (max, args, in_decl); |
5156628f | 4153 | if (processing_template_decl) |
5566b478 MS |
4154 | { |
4155 | tree itype = make_node (INTEGER_TYPE); | |
4156 | TYPE_MIN_VALUE (itype) = size_zero_node; | |
37c46b43 MS |
4157 | TYPE_MAX_VALUE (itype) = build_min (MINUS_EXPR, sizetype, max, |
4158 | integer_one_node); | |
5566b478 MS |
4159 | return itype; |
4160 | } | |
37c46b43 MS |
4161 | |
4162 | max = fold (build_binary_op (MINUS_EXPR, max, integer_one_node, 1)); | |
5566b478 MS |
4163 | return build_index_2_type (size_zero_node, max); |
4164 | } | |
8d08fdba MS |
4165 | |
4166 | case TEMPLATE_TYPE_PARM: | |
73b0fce8 | 4167 | case TEMPLATE_TEMPLATE_PARM: |
f84b4be9 | 4168 | case TEMPLATE_PARM_INDEX: |
db5ae43f | 4169 | { |
98c1c668 JM |
4170 | int idx; |
4171 | int level; | |
93cdc044 | 4172 | int levels; |
f84b4be9 | 4173 | tree r = NULL_TREE; |
98c1c668 | 4174 | |
73b0fce8 KL |
4175 | if (TREE_CODE (t) == TEMPLATE_TYPE_PARM |
4176 | || TREE_CODE (t) == TEMPLATE_TEMPLATE_PARM) | |
98c1c668 JM |
4177 | { |
4178 | idx = TEMPLATE_TYPE_IDX (t); | |
4179 | level = TEMPLATE_TYPE_LEVEL (t); | |
4180 | } | |
4181 | else | |
4182 | { | |
f84b4be9 JM |
4183 | idx = TEMPLATE_PARM_IDX (t); |
4184 | level = TEMPLATE_PARM_LEVEL (t); | |
98c1c668 JM |
4185 | } |
4186 | ||
f84b4be9 | 4187 | if (TREE_VEC_LENGTH (args) > 0) |
98c1c668 JM |
4188 | { |
4189 | tree arg = NULL_TREE; | |
4190 | ||
050367a3 MM |
4191 | if (TREE_VEC_ELT (args, 0) != NULL_TREE |
4192 | && TREE_CODE (TREE_VEC_ELT (args, 0)) == TREE_VEC) | |
98c1c668 | 4193 | { |
93cdc044 JM |
4194 | levels = TREE_VEC_LENGTH (args); |
4195 | if (level <= levels) | |
98c1c668 JM |
4196 | arg = TREE_VEC_ELT |
4197 | (TREE_VEC_ELT (args, level - 1), idx); | |
4198 | } | |
93cdc044 JM |
4199 | else |
4200 | { | |
4201 | levels = 1; | |
4202 | if (level == 1) | |
4203 | arg = TREE_VEC_ELT (args, idx); | |
4204 | } | |
98c1c668 JM |
4205 | |
4206 | if (arg != NULL_TREE) | |
4207 | { | |
4208 | if (TREE_CODE (t) == TEMPLATE_TYPE_PARM) | |
4209 | return cp_build_type_variant | |
4210 | (arg, TYPE_READONLY (arg) || TYPE_READONLY (t), | |
4211 | TYPE_VOLATILE (arg) || TYPE_VOLATILE (t)); | |
73b0fce8 KL |
4212 | else if (TREE_CODE (t) == TEMPLATE_TEMPLATE_PARM) |
4213 | { | |
4214 | if (CLASSTYPE_TEMPLATE_INFO (t)) | |
4215 | { | |
4216 | /* We are processing a type constructed from | |
4217 | a template template parameter */ | |
b7a29012 | 4218 | tree argvec = tsubst (CLASSTYPE_TI_ARGS (t), |
f7d98d58 | 4219 | args, in_decl); |
73b0fce8 KL |
4220 | tree r; |
4221 | ||
4222 | /* We can get a TEMPLATE_TEMPLATE_PARM here when | |
4223 | we are resolving nested-types in the signature of | |
4224 | a member function templates. | |
4225 | Otherwise ARG is a TEMPLATE_DECL and is the real | |
4226 | template to be instantiated. */ | |
4227 | if (TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM) | |
4228 | arg = TYPE_NAME (arg); | |
4229 | ||
4230 | r = lookup_template_class (DECL_NAME (arg), | |
e1467ff2 MM |
4231 | argvec, in_decl, |
4232 | DECL_CONTEXT (arg)); | |
73b0fce8 KL |
4233 | return cp_build_type_variant (r, TYPE_READONLY (t), |
4234 | TYPE_VOLATILE (t)); | |
4235 | } | |
4236 | else | |
4237 | /* We are processing a template argument list. */ | |
4238 | return arg; | |
4239 | } | |
98c1c668 JM |
4240 | else |
4241 | return arg; | |
4242 | } | |
4243 | } | |
4244 | ||
050367a3 MM |
4245 | if (level == 1) |
4246 | /* This can happen during the attempted tsubst'ing in | |
4247 | unify. This means that we don't yet have any information | |
4248 | about the template parameter in question. */ | |
4249 | return t; | |
4250 | ||
98c1c668 | 4251 | /* If we get here, we must have been looking at a parm for a |
050367a3 MM |
4252 | more deeply nested template. Make a new version of this |
4253 | template parameter, but with a lower level. */ | |
f84b4be9 JM |
4254 | switch (TREE_CODE (t)) |
4255 | { | |
4256 | case TEMPLATE_TYPE_PARM: | |
4257 | case TEMPLATE_TEMPLATE_PARM: | |
362badb0 | 4258 | r = copy_node (t); |
f84b4be9 JM |
4259 | TEMPLATE_TYPE_PARM_INDEX (r) |
4260 | = reduce_template_parm_level (TEMPLATE_TYPE_PARM_INDEX (t), | |
93cdc044 | 4261 | r, levels); |
f84b4be9 JM |
4262 | TYPE_STUB_DECL (r) = TYPE_NAME (r) = TEMPLATE_TYPE_DECL (r); |
4263 | TYPE_MAIN_VARIANT (r) = r; | |
4264 | TYPE_POINTER_TO (r) = NULL_TREE; | |
debf0b88 | 4265 | TYPE_REFERENCE_TO (r) = NULL_TREE; |
362badb0 KL |
4266 | |
4267 | if (TREE_CODE (t) == TEMPLATE_TEMPLATE_PARM | |
4268 | && CLASSTYPE_TEMPLATE_INFO (t)) | |
4269 | { | |
4270 | tree argvec = tsubst (CLASSTYPE_TI_ARGS (t), args, in_decl); | |
4271 | CLASSTYPE_TEMPLATE_INFO (r) | |
4272 | = perm_tree_cons (TYPE_NAME (t), argvec, NULL_TREE); | |
4273 | } | |
f84b4be9 JM |
4274 | break; |
4275 | ||
4276 | case TEMPLATE_PARM_INDEX: | |
93cdc044 | 4277 | r = reduce_template_parm_level (t, TREE_TYPE (t), levels); |
f84b4be9 JM |
4278 | break; |
4279 | ||
4280 | default: | |
4281 | my_friendly_abort (0); | |
4282 | } | |
4283 | ||
4284 | return r; | |
db5ae43f | 4285 | } |
8d08fdba | 4286 | |
98c1c668 JM |
4287 | case TEMPLATE_DECL: |
4288 | { | |
4289 | /* We can get here when processing a member template function | |
4290 | of a template class. */ | |
4291 | tree tmpl; | |
4292 | tree decl = DECL_TEMPLATE_RESULT (t); | |
98c1c668 | 4293 | tree parms; |
f84b4be9 | 4294 | tree* new_parms; |
386b8a85 | 4295 | tree spec; |
db2767b6 | 4296 | int is_template_template_parm = DECL_TEMPLATE_TEMPLATE_PARM_P (t); |
98c1c668 | 4297 | |
db2767b6 MM |
4298 | if (!is_template_template_parm) |
4299 | { | |
4300 | /* We might already have an instance of this template. */ | |
4301 | spec = retrieve_specialization (t, args); | |
4302 | if (spec != NULL_TREE) | |
4303 | return spec; | |
4304 | } | |
98c1c668 JM |
4305 | |
4306 | /* Make a new template decl. It will be similar to the | |
4307 | original, but will record the current template arguments. | |
4308 | We also create a new function declaration, which is just | |
4309 | like the old one, but points to this new template, rather | |
4310 | than the old one. */ | |
4311 | tmpl = copy_node (t); | |
4312 | copy_lang_decl (tmpl); | |
4313 | my_friendly_assert (DECL_LANG_SPECIFIC (tmpl) != 0, 0); | |
98c1c668 | 4314 | TREE_CHAIN (tmpl) = NULL_TREE; |
db2767b6 MM |
4315 | |
4316 | if (is_template_template_parm) | |
4317 | { | |
4318 | tree new_decl = tsubst (decl, args, in_decl); | |
4319 | DECL_RESULT (tmpl) = new_decl; | |
4320 | TREE_TYPE (tmpl) = TREE_TYPE (new_decl); | |
4321 | return tmpl; | |
4322 | } | |
4323 | ||
f84b4be9 | 4324 | DECL_CONTEXT (tmpl) = tsubst (DECL_CONTEXT (t), |
f7d98d58 | 4325 | args, in_decl); |
f84b4be9 | 4326 | DECL_CLASS_CONTEXT (tmpl) = tsubst (DECL_CLASS_CONTEXT (t), |
f7d98d58 | 4327 | args, in_decl); |
98c1c668 | 4328 | DECL_TEMPLATE_INFO (tmpl) = build_tree_list (t, args); |
93cdc044 JM |
4329 | |
4330 | if (TREE_CODE (decl) == TYPE_DECL) | |
4331 | { | |
4332 | tree new_type = tsubst (TREE_TYPE (t), args, in_decl); | |
4333 | TREE_TYPE (tmpl) = new_type; | |
4334 | CLASSTYPE_TI_TEMPLATE (new_type) = tmpl; | |
4335 | DECL_RESULT (tmpl) = TYPE_MAIN_DECL (new_type); | |
4336 | } | |
4337 | else | |
4338 | { | |
4339 | tree new_decl = tsubst (decl, args, in_decl); | |
4340 | DECL_RESULT (tmpl) = new_decl; | |
4341 | DECL_TI_TEMPLATE (new_decl) = tmpl; | |
4342 | TREE_TYPE (tmpl) = TREE_TYPE (new_decl); | |
4343 | } | |
4344 | ||
27bb8339 | 4345 | DECL_TEMPLATE_INSTANTIATIONS (tmpl) = NULL_TREE; |
fee23f54 | 4346 | SET_DECL_IMPLICIT_INSTANTIATION (tmpl); |
98c1c668 JM |
4347 | |
4348 | /* The template parameters for this new template are all the | |
4349 | template parameters for the old template, except the | |
4350 | outermost level of parameters. */ | |
f84b4be9 JM |
4351 | for (new_parms = &DECL_TEMPLATE_PARMS (tmpl), |
4352 | parms = DECL_TEMPLATE_PARMS (t); | |
98c1c668 | 4353 | TREE_CHAIN (parms) != NULL_TREE; |
f84b4be9 JM |
4354 | new_parms = &(TREE_CHAIN (*new_parms)), |
4355 | parms = TREE_CHAIN (parms)) | |
4356 | { | |
4357 | tree new_vec = | |
4358 | make_tree_vec (TREE_VEC_LENGTH (TREE_VALUE (parms))); | |
4359 | int i; | |
4360 | ||
4361 | for (i = 0; i < TREE_VEC_LENGTH (new_vec); ++i) | |
4362 | { | |
4363 | tree default_value = | |
4364 | TREE_PURPOSE (TREE_VEC_ELT (TREE_VALUE (parms), i)); | |
4365 | tree parm_decl = | |
4366 | TREE_VALUE (TREE_VEC_ELT (TREE_VALUE (parms), i)); | |
4367 | ||
4368 | TREE_VEC_ELT (new_vec, i) | |
f7d98d58 JM |
4369 | = build_tree_list (tsubst (default_value, args, in_decl), |
4370 | tsubst (parm_decl, args, in_decl)); | |
f84b4be9 JM |
4371 | |
4372 | } | |
4373 | ||
4374 | *new_parms = | |
4375 | tree_cons (build_int_2 (0, | |
4376 | TREE_INT_CST_HIGH | |
4377 | (TREE_PURPOSE (parms)) - 1), | |
4378 | new_vec, | |
4379 | NULL_TREE); | |
4380 | } | |
98c1c668 | 4381 | |
93cdc044 | 4382 | if (PRIMARY_TEMPLATE_P (t)) |
830bfa74 | 4383 | DECL_PRIMARY_TEMPLATE (tmpl) = tmpl; |
93cdc044 | 4384 | |
8d019cef | 4385 | /* We don't partially instantiate partial specializations. */ |
93cdc044 JM |
4386 | if (TREE_CODE (decl) == TYPE_DECL) |
4387 | return tmpl; | |
4388 | ||
75650646 MM |
4389 | /* What should we do with the specializations of this member |
4390 | template? Are they specializations of this new template, | |
4391 | or instantiations of the templates they previously were? | |
4392 | this new template? And where should their | |
4393 | DECL_TI_TEMPLATES point? */ | |
386b8a85 | 4394 | DECL_TEMPLATE_SPECIALIZATIONS (tmpl) = NULL_TREE; |
75650646 MM |
4395 | for (spec = DECL_TEMPLATE_SPECIALIZATIONS (t); |
4396 | spec != NULL_TREE; | |
4397 | spec = TREE_CHAIN (spec)) | |
4398 | { | |
4399 | /* It helps to consider example here. Consider: | |
4400 | ||
4401 | template <class T> | |
4402 | struct S { | |
4403 | template <class U> | |
4404 | void f(U u); | |
4405 | ||
4406 | template <> | |
4407 | void f(T* t) {} | |
4408 | }; | |
4409 | ||
4410 | Now, for example, we are instantiating S<int>::f(U u). | |
4411 | We want to make a template: | |
4412 | ||
4413 | template <class U> | |
4414 | void S<int>::f(U); | |
4415 | ||
4416 | It will have a specialization, for the case U = int*, of | |
4417 | the form: | |
4418 | ||
4419 | template <> | |
4420 | void S<int>::f<int*>(int*); | |
4421 | ||
4422 | This specialization will be an instantiation of | |
4423 | the specialization given in the declaration of S, with | |
4424 | argument list int*. */ | |
4425 | ||
4426 | tree fn = TREE_VALUE (spec); | |
4427 | tree spec_args; | |
4428 | tree new_fn; | |
4429 | ||
4430 | if (!DECL_TEMPLATE_SPECIALIZATION (fn)) | |
4431 | /* Instantiations are on the same list, but they're of | |
4432 | no concern to us. */ | |
4433 | continue; | |
4434 | ||
f7d98d58 | 4435 | spec_args = tsubst (DECL_TI_ARGS (fn), args, |
75650646 | 4436 | in_decl); |
f7d98d58 | 4437 | new_fn = tsubst (DECL_RESULT (fn), args, |
75650646 MM |
4438 | in_decl); |
4439 | DECL_TEMPLATE_SPECIALIZATIONS (tmpl) = | |
4440 | perm_tree_cons (spec_args, new_fn, | |
4441 | DECL_TEMPLATE_SPECIALIZATIONS (tmpl)); | |
4442 | } | |
4443 | ||
4444 | /* Record this partial instantiation. */ | |
4445 | register_specialization (tmpl, t, args); | |
4446 | ||
98c1c668 JM |
4447 | return tmpl; |
4448 | } | |
8d08fdba MS |
4449 | |
4450 | case FUNCTION_DECL: | |
4451 | { | |
5566b478 | 4452 | tree r = NULL_TREE; |
386b8a85 | 4453 | tree ctx; |
a221d52f | 4454 | tree argvec; |
f84b4be9 | 4455 | tree tmpl = NULL_TREE; |
5566b478 MS |
4456 | int member; |
4457 | ||
6eb3bb27 | 4458 | if (DECL_CLASS_SCOPE_P (t)) |
8d08fdba | 4459 | { |
5566b478 MS |
4460 | if (DECL_NAME (t) == constructor_name (DECL_CONTEXT (t))) |
4461 | member = 2; | |
4462 | else | |
4463 | member = 1; | |
f7d98d58 JM |
4464 | ctx = tsubst (DECL_CLASS_CONTEXT (t), args, t); |
4465 | type = tsubst (type, args, in_decl); | |
5566b478 MS |
4466 | } |
4467 | else | |
4468 | { | |
4469 | member = 0; | |
4470 | ctx = NULL_TREE; | |
f7d98d58 | 4471 | type = tsubst (type, args, in_decl); |
5566b478 | 4472 | } |
8d08fdba | 4473 | |
f84b4be9 | 4474 | /* If we are instantiating a specialization, get the other args. */ |
5566b478 MS |
4475 | if (DECL_TEMPLATE_INFO (t) != NULL_TREE) |
4476 | { | |
f84b4be9 JM |
4477 | tree spec; |
4478 | ||
4479 | tmpl = DECL_TI_TEMPLATE (t); | |
a221d52f JM |
4480 | |
4481 | /* Start by getting the innermost args. */ | |
f7d98d58 | 4482 | argvec = tsubst (DECL_TI_ARGS (t), args, in_decl); |
a221d52f | 4483 | |
e6f1275f JM |
4484 | if (DECL_TEMPLATE_INFO (tmpl)) |
4485 | argvec = complete_template_args (tmpl, argvec, 0); | |
5566b478 | 4486 | |
f84b4be9 | 4487 | /* Do we already have this instantiation? */ |
a221d52f | 4488 | spec = retrieve_specialization (tmpl, argvec); |
75650646 MM |
4489 | if (spec) |
4490 | return spec; | |
5566b478 MS |
4491 | } |
4492 | ||
4493 | /* We do NOT check for matching decls pushed separately at this | |
4494 | point, as they may not represent instantiations of this | |
4495 | template, and in any case are considered separate under the | |
312e7d50 | 4496 | discrete model. Instead, see add_maybe_template. */ |
5566b478 MS |
4497 | |
4498 | r = copy_node (t); | |
4499 | copy_lang_decl (r); | |
e1467ff2 | 4500 | DECL_USE_TEMPLATE (r) = 0; |
5566b478 MS |
4501 | TREE_TYPE (r) = type; |
4502 | ||
4503 | DECL_CONTEXT (r) | |
f7d98d58 | 4504 | = tsubst (DECL_CONTEXT (t), args, t); |
5566b478 MS |
4505 | DECL_CLASS_CONTEXT (r) = ctx; |
4506 | ||
4507 | if (member && !strncmp (OPERATOR_TYPENAME_FORMAT, | |
4508 | IDENTIFIER_POINTER (DECL_NAME (r)), | |
4509 | sizeof (OPERATOR_TYPENAME_FORMAT) - 1)) | |
4510 | { | |
4511 | /* Type-conversion operator. Reconstruct the name, in | |
4512 | case it's the name of one of the template's parameters. */ | |
4513 | DECL_NAME (r) = build_typename_overload (TREE_TYPE (type)); | |
4514 | } | |
4515 | ||
5566b478 MS |
4516 | if (DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (t))) |
4517 | { | |
4518 | char *buf, *dbuf = build_overload_name (ctx, 1, 1); | |
4519 | int len = sizeof (DESTRUCTOR_DECL_PREFIX) - 1; | |
4520 | buf = (char *) alloca (strlen (dbuf) | |
4521 | + sizeof (DESTRUCTOR_DECL_PREFIX)); | |
4522 | bcopy (DESTRUCTOR_DECL_PREFIX, buf, len); | |
4523 | buf[len] = '\0'; | |
4524 | strcat (buf, dbuf); | |
4525 | DECL_ASSEMBLER_NAME (r) = get_identifier (buf); | |
8d08fdba | 4526 | } |
386b8a85 JM |
4527 | else |
4528 | { | |
4529 | /* Instantiations of template functions must be mangled | |
4530 | specially, in order to conform to 14.5.5.1 | |
4531 | [temp.over.link]. We use in_decl below rather than | |
4532 | DECL_TI_TEMPLATE (r) because the latter is set to | |
4533 | NULL_TREE in instantiate_decl. */ | |
4534 | tree tmpl; | |
4535 | tree arg_types; | |
4536 | ||
4537 | if (DECL_TEMPLATE_INFO (r)) | |
4538 | tmpl = DECL_TI_TEMPLATE (r); | |
4539 | else | |
4540 | tmpl = in_decl; | |
4541 | ||
4542 | /* tmpl will be NULL if this is a specialization of a | |
a221d52f | 4543 | member function of a template class. */ |
386b8a85 JM |
4544 | if (name_mangling_version < 1 |
4545 | || tmpl == NULL_TREE | |
4546 | || (member && !is_member_template (tmpl) | |
4547 | && !DECL_TEMPLATE_INFO (tmpl))) | |
4548 | { | |
4549 | arg_types = TYPE_ARG_TYPES (type); | |
4550 | if (member && TREE_CODE (type) == FUNCTION_TYPE) | |
4551 | arg_types = hash_tree_chain | |
4552 | (build_pointer_type (DECL_CONTEXT (r)), | |
4553 | arg_types); | |
4554 | ||
4555 | DECL_ASSEMBLER_NAME (r) | |
4556 | = build_decl_overload (DECL_NAME (r), arg_types, | |
4557 | member); | |
4558 | } | |
4559 | else | |
4560 | { | |
f84b4be9 | 4561 | tree tparms; |
75650646 MM |
4562 | tree targs; |
4563 | ||
4564 | if (!DECL_TEMPLATE_SPECIALIZATION (tmpl)) | |
4565 | { | |
a221d52f JM |
4566 | /* We pass the outermost template parameters to |
4567 | build_template_decl_overload, since the innermost | |
4568 | template parameters are still just template | |
4569 | parameters; there are no corresponding subsitution | |
4570 | arguments. Levels of parms that have been bound | |
4571 | before are not represented in DECL_TEMPLATE_PARMS. */ | |
75650646 | 4572 | tparms = DECL_TEMPLATE_PARMS (tmpl); |
75650646 MM |
4573 | while (tparms && TREE_CHAIN (tparms) != NULL_TREE) |
4574 | tparms = TREE_CHAIN (tparms); | |
4575 | ||
a221d52f | 4576 | targs = innermost_args (args, 0); |
75650646 MM |
4577 | } |
4578 | else | |
4579 | { | |
4580 | /* If the template is a specialization, then it is | |
4581 | a member template specialization. We have | |
4582 | something like: | |
4583 | ||
4584 | template <class T> struct S { | |
4585 | template <int i> void f(); | |
4586 | template <> void f<7>(); | |
4587 | }; | |
4588 | ||
4589 | and now we are forming S<double>::f<7>. | |
4590 | Therefore, the template parameters of interest | |
4591 | are those that are specialized by the template | |
4592 | (i.e., the int), not those we are using to | |
4593 | instantiate the template, i.e. the double. */ | |
4594 | tparms = DECL_TEMPLATE_PARMS (DECL_TI_TEMPLATE (tmpl)); | |
4595 | targs = DECL_TI_ARGS (tmpl); | |
4596 | } | |
4597 | ||
386b8a85 JM |
4598 | my_friendly_assert (tparms != NULL_TREE |
4599 | && TREE_CODE (tparms) == TREE_LIST, | |
4600 | 0); | |
4601 | tparms = TREE_VALUE (tparms); | |
75650646 | 4602 | |
386b8a85 JM |
4603 | arg_types = TYPE_ARG_TYPES (TREE_TYPE (tmpl)); |
4604 | if (member && TREE_CODE (type) == FUNCTION_TYPE) | |
4605 | arg_types = hash_tree_chain | |
4606 | (build_pointer_type (DECL_CONTEXT (r)), | |
4607 | arg_types); | |
4608 | ||
4609 | DECL_ASSEMBLER_NAME (r) | |
4610 | = build_template_decl_overload | |
4611 | (DECL_NAME (r), arg_types, | |
4612 | TREE_TYPE (TREE_TYPE (tmpl)), | |
75650646 | 4613 | tparms, targs, member); |
386b8a85 JM |
4614 | } |
4615 | } | |
5566b478 MS |
4616 | DECL_RTL (r) = 0; |
4617 | make_decl_rtl (r, NULL_PTR, 1); | |
4618 | ||
f7d98d58 | 4619 | DECL_ARGUMENTS (r) = tsubst (DECL_ARGUMENTS (t), args, t); |
5566b478 MS |
4620 | DECL_MAIN_VARIANT (r) = r; |
4621 | DECL_RESULT (r) = NULL_TREE; | |
4622 | DECL_INITIAL (r) = NULL_TREE; | |
4623 | ||
4624 | TREE_STATIC (r) = 0; | |
75650646 | 4625 | TREE_PUBLIC (r) = TREE_PUBLIC (t); |
5566b478 MS |
4626 | DECL_EXTERNAL (r) = 1; |
4627 | DECL_INTERFACE_KNOWN (r) = 0; | |
4628 | DECL_DEFER_OUTPUT (r) = 0; | |
4629 | TREE_CHAIN (r) = NULL_TREE; | |
ff369548 | 4630 | DECL_PENDING_INLINE_INFO (r) = 0; |
b4c4a9ec | 4631 | TREE_USED (r) = 0; |
5566b478 MS |
4632 | |
4633 | if (IDENTIFIER_OPNAME_P (DECL_NAME (r))) | |
4634 | grok_op_properties (r, DECL_VIRTUAL_P (r), DECL_FRIEND_P (r)); | |
4635 | ||
5566b478 MS |
4636 | if (DECL_TEMPLATE_INFO (t) != NULL_TREE) |
4637 | { | |
5566b478 | 4638 | DECL_TEMPLATE_INFO (r) = perm_tree_cons (tmpl, argvec, NULL_TREE); |
5566b478 | 4639 | |
e1467ff2 MM |
4640 | /* If we're not using ANSI overloading, then we might have |
4641 | called duplicate_decls above, and gotten back an | |
4642 | preexisting version of this function. We treat such a | |
4643 | function as a specialization. Otherwise, we cleared | |
4644 | both TREE_STATIC and DECL_TEMPLATE_SPECIALIZATION, so | |
4645 | this condition will be false. */ | |
4646 | if (TREE_STATIC (r) || DECL_TEMPLATE_SPECIALIZATION (r)) | |
5566b478 MS |
4647 | SET_DECL_TEMPLATE_SPECIALIZATION (r); |
4648 | else | |
4649 | SET_DECL_IMPLICIT_INSTANTIATION (r); | |
4650 | ||
75650646 | 4651 | register_specialization (r, tmpl, argvec); |
8d08fdba | 4652 | } |
8d08fdba | 4653 | |
e92cc029 MS |
4654 | /* Like grokfndecl. If we don't do this, pushdecl will mess up our |
4655 | TREE_CHAIN because it doesn't find a previous decl. Sigh. */ | |
4656 | if (member | |
4657 | && IDENTIFIER_GLOBAL_VALUE (DECL_ASSEMBLER_NAME (r)) == NULL_TREE) | |
2c73f9f5 | 4658 | SET_IDENTIFIER_GLOBAL_VALUE (DECL_ASSEMBLER_NAME (r), r); |
e92cc029 | 4659 | |
8d08fdba MS |
4660 | return r; |
4661 | } | |
4662 | ||
4663 | case PARM_DECL: | |
4664 | { | |
5566b478 MS |
4665 | tree r = copy_node (t); |
4666 | TREE_TYPE (r) = type; | |
db2767b6 MM |
4667 | if (TREE_CODE (DECL_INITIAL (r)) != TEMPLATE_PARM_INDEX) |
4668 | DECL_INITIAL (r) = TREE_TYPE (r); | |
4669 | else | |
4670 | DECL_INITIAL (r) = tsubst (DECL_INITIAL (r), args, in_decl); | |
4671 | ||
5566b478 | 4672 | DECL_CONTEXT (r) = NULL_TREE; |
f83b0cb6 JM |
4673 | #ifdef PROMOTE_PROTOTYPES |
4674 | if ((TREE_CODE (type) == INTEGER_TYPE | |
4675 | || TREE_CODE (type) == ENUMERAL_TYPE) | |
4676 | && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node)) | |
4677 | DECL_ARG_TYPE (r) = integer_type_node; | |
4678 | #endif | |
8d08fdba | 4679 | if (TREE_CHAIN (t)) |
f7d98d58 | 4680 | TREE_CHAIN (r) = tsubst (TREE_CHAIN (t), args, TREE_CHAIN (t)); |
8d08fdba MS |
4681 | return r; |
4682 | } | |
4683 | ||
5566b478 MS |
4684 | case FIELD_DECL: |
4685 | { | |
4686 | tree r = copy_node (t); | |
4687 | TREE_TYPE (r) = type; | |
4688 | copy_lang_decl (r); | |
4689 | #if 0 | |
f7d98d58 | 4690 | DECL_FIELD_CONTEXT (r) = tsubst (DECL_FIELD_CONTEXT (t), args, in_decl); |
5566b478 | 4691 | #endif |
f7d98d58 | 4692 | DECL_INITIAL (r) = tsubst_expr (DECL_INITIAL (t), args, in_decl); |
5566b478 MS |
4693 | TREE_CHAIN (r) = NULL_TREE; |
4694 | return r; | |
4695 | } | |
4696 | ||
4697 | case USING_DECL: | |
4698 | { | |
4699 | tree r = copy_node (t); | |
4700 | DECL_INITIAL (r) | |
f7d98d58 | 4701 | = tsubst_copy (DECL_INITIAL (t), args, in_decl); |
5566b478 MS |
4702 | TREE_CHAIN (r) = NULL_TREE; |
4703 | return r; | |
4704 | } | |
4705 | ||
4706 | case VAR_DECL: | |
4707 | { | |
4708 | tree r; | |
f7d98d58 | 4709 | tree ctx = tsubst_copy (DECL_CONTEXT (t), args, in_decl); |
5566b478 MS |
4710 | |
4711 | /* Do we already have this instantiation? */ | |
4712 | if (DECL_LANG_SPECIFIC (t) && DECL_TEMPLATE_INFO (t)) | |
4713 | { | |
4714 | tree tmpl = DECL_TI_TEMPLATE (t); | |
4715 | tree decls = DECL_TEMPLATE_INSTANTIATIONS (tmpl); | |
4716 | ||
4717 | for (; decls; decls = TREE_CHAIN (decls)) | |
4718 | if (DECL_CONTEXT (TREE_VALUE (decls)) == ctx) | |
4719 | return TREE_VALUE (decls); | |
4720 | } | |
4721 | ||
4722 | r = copy_node (t); | |
4723 | TREE_TYPE (r) = type; | |
4724 | DECL_CONTEXT (r) = ctx; | |
4725 | if (TREE_STATIC (r)) | |
4726 | DECL_ASSEMBLER_NAME (r) | |
4727 | = build_static_name (DECL_CONTEXT (r), DECL_NAME (r)); | |
d11ad92e MS |
4728 | |
4729 | /* Don't try to expand the initializer until someone tries to use | |
4730 | this variable; otherwise we run into circular dependencies. */ | |
4731 | DECL_INITIAL (r) = NULL_TREE; | |
5566b478 MS |
4732 | |
4733 | DECL_RTL (r) = 0; | |
4734 | DECL_SIZE (r) = 0; | |
4735 | ||
4736 | if (DECL_LANG_SPECIFIC (r)) | |
4737 | { | |
4738 | copy_lang_decl (r); | |
4739 | DECL_CLASS_CONTEXT (r) = DECL_CONTEXT (r); | |
4740 | } | |
4741 | ||
4742 | if (DECL_LANG_SPECIFIC (t) && DECL_TEMPLATE_INFO (t)) | |
4743 | { | |
4744 | tree tmpl = DECL_TI_TEMPLATE (t); | |
4745 | tree *declsp = &DECL_TEMPLATE_INSTANTIATIONS (tmpl); | |
f7d98d58 | 4746 | tree argvec = tsubst (DECL_TI_ARGS (t), args, in_decl); |
5566b478 MS |
4747 | |
4748 | DECL_TEMPLATE_INFO (r) = perm_tree_cons (tmpl, argvec, NULL_TREE); | |
4749 | *declsp = perm_tree_cons (argvec, r, *declsp); | |
4750 | SET_DECL_IMPLICIT_INSTANTIATION (r); | |
4751 | } | |
4752 | TREE_CHAIN (r) = NULL_TREE; | |
4753 | return r; | |
4754 | } | |
4755 | ||
4756 | case TYPE_DECL: | |
d2e5ee5c MS |
4757 | if (t == TYPE_NAME (TREE_TYPE (t))) |
4758 | return TYPE_NAME (type); | |
4759 | ||
5566b478 MS |
4760 | { |
4761 | tree r = copy_node (t); | |
4762 | TREE_TYPE (r) = type; | |
909e536a | 4763 | DECL_CONTEXT (r) = current_class_type; |
5566b478 MS |
4764 | TREE_CHAIN (r) = NULL_TREE; |
4765 | return r; | |
4766 | } | |
4767 | ||
8d08fdba MS |
4768 | case TREE_LIST: |
4769 | { | |
4770 | tree purpose, value, chain, result; | |
4771 | int via_public, via_virtual, via_protected; | |
4772 | ||
4773 | if (t == void_list_node) | |
4774 | return t; | |
4775 | ||
4776 | via_public = TREE_VIA_PUBLIC (t); | |
4777 | via_protected = TREE_VIA_PROTECTED (t); | |
4778 | via_virtual = TREE_VIA_VIRTUAL (t); | |
4779 | ||
4780 | purpose = TREE_PURPOSE (t); | |
4781 | if (purpose) | |
f7d98d58 | 4782 | purpose = tsubst (purpose, args, in_decl); |
8d08fdba MS |
4783 | value = TREE_VALUE (t); |
4784 | if (value) | |
f7d98d58 | 4785 | value = tsubst (value, args, in_decl); |
8d08fdba MS |
4786 | chain = TREE_CHAIN (t); |
4787 | if (chain && chain != void_type_node) | |
f7d98d58 | 4788 | chain = tsubst (chain, args, in_decl); |
8d08fdba MS |
4789 | if (purpose == TREE_PURPOSE (t) |
4790 | && value == TREE_VALUE (t) | |
4791 | && chain == TREE_CHAIN (t)) | |
4792 | return t; | |
4793 | result = hash_tree_cons (via_public, via_virtual, via_protected, | |
4794 | purpose, value, chain); | |
4795 | TREE_PARMLIST (result) = TREE_PARMLIST (t); | |
4796 | return result; | |
4797 | } | |
4798 | case TREE_VEC: | |
5566b478 MS |
4799 | if (type != NULL_TREE) |
4800 | { | |
85b71cf2 JM |
4801 | /* A binfo node. */ |
4802 | ||
5566b478 MS |
4803 | t = copy_node (t); |
4804 | ||
c7449f2b JM |
4805 | /* Make sure type isn't a typedef copy. */ |
4806 | type = BINFO_TYPE (TYPE_BINFO (type)); | |
4807 | ||
5566b478 MS |
4808 | if (type == TREE_TYPE (t)) |
4809 | return t; | |
4810 | ||
4811 | TREE_TYPE (t) = complete_type (type); | |
6633d636 MS |
4812 | if (IS_AGGR_TYPE (type)) |
4813 | { | |
4814 | BINFO_VTABLE (t) = TYPE_BINFO_VTABLE (type); | |
4815 | BINFO_VIRTUALS (t) = TYPE_BINFO_VIRTUALS (type); | |
4816 | if (TYPE_BINFO_BASETYPES (type) != NULL_TREE) | |
4817 | BINFO_BASETYPES (t) = copy_node (TYPE_BINFO_BASETYPES (type)); | |
4818 | } | |
5566b478 MS |
4819 | return t; |
4820 | } | |
85b71cf2 JM |
4821 | |
4822 | /* Otherwise, a vector of template arguments. */ | |
830bfa74 | 4823 | return tsubst_template_arg_vector (t, args); |
8d08fdba | 4824 | |
8d08fdba MS |
4825 | case POINTER_TYPE: |
4826 | case REFERENCE_TYPE: | |
4827 | { | |
4828 | tree r; | |
4829 | enum tree_code code; | |
79a7c7fa | 4830 | |
8d08fdba MS |
4831 | if (type == TREE_TYPE (t)) |
4832 | return t; | |
4833 | ||
4834 | code = TREE_CODE (t); | |
79a7c7fa JM |
4835 | if (TREE_CODE (type) == REFERENCE_TYPE) |
4836 | { | |
4837 | static int last_line = 0; | |
4838 | static char* last_file = 0; | |
4839 | ||
4840 | /* We keep track of the last time we issued this error | |
4841 | message to avoid spewing a ton of messages during a | |
4842 | single bad template instantiation. */ | |
4843 | if (last_line != lineno || | |
4844 | last_file != input_filename) | |
4845 | { | |
4846 | cp_error ("cannot form type %s to reference type %T during template instantiation", | |
4847 | (code == POINTER_TYPE) ? "pointer" : "reference", | |
4848 | type); | |
4849 | last_line = lineno; | |
4850 | last_file = input_filename; | |
4851 | } | |
4852 | ||
4853 | /* Use the underlying type in an attempt at error | |
4854 | recovery; maybe the user meant vector<int> and wrote | |
4855 | vector<int&>, or some such. */ | |
4856 | if (code == REFERENCE_TYPE) | |
4857 | r = type; | |
4858 | else | |
4859 | r = build_pointer_type (TREE_TYPE (type)); | |
4860 | } | |
4861 | else if (code == POINTER_TYPE) | |
8d08fdba MS |
4862 | r = build_pointer_type (type); |
4863 | else | |
4864 | r = build_reference_type (type); | |
f376e137 | 4865 | r = cp_build_type_variant (r, TYPE_READONLY (t), TYPE_VOLATILE (t)); |
79a7c7fa | 4866 | |
8d08fdba MS |
4867 | /* Will this ever be needed for TYPE_..._TO values? */ |
4868 | layout_type (r); | |
4869 | return r; | |
4870 | } | |
a4443a08 MS |
4871 | case OFFSET_TYPE: |
4872 | return build_offset_type | |
f7d98d58 | 4873 | (tsubst (TYPE_OFFSET_BASETYPE (t), args, in_decl), type); |
8d08fdba MS |
4874 | case FUNCTION_TYPE: |
4875 | case METHOD_TYPE: | |
4876 | { | |
75b0bbce | 4877 | tree values = TYPE_ARG_TYPES (t); |
8d08fdba | 4878 | tree context = TYPE_CONTEXT (t); |
c11b6f21 MS |
4879 | tree raises = TYPE_RAISES_EXCEPTIONS (t); |
4880 | tree fntype; | |
8d08fdba MS |
4881 | |
4882 | /* Don't bother recursing if we know it won't change anything. */ | |
4883 | if (values != void_list_node) | |
5566b478 MS |
4884 | { |
4885 | /* This should probably be rewritten to use hash_tree_cons for | |
4886 | the memory savings. */ | |
4887 | tree first = NULL_TREE; | |
a703fb38 | 4888 | tree last = NULL_TREE; |
5566b478 MS |
4889 | |
4890 | for (; values && values != void_list_node; | |
4891 | values = TREE_CHAIN (values)) | |
4892 | { | |
f7da6097 | 4893 | tree value = TYPE_MAIN_VARIANT (type_decays_to |
f7d98d58 | 4894 | (tsubst (TREE_VALUE (values), args, in_decl))); |
de22184b MS |
4895 | /* Don't instantiate default args unless they are used. |
4896 | Handle it in build_over_call instead. */ | |
4897 | tree purpose = TREE_PURPOSE (values); | |
5566b478 MS |
4898 | tree x = build_tree_list (purpose, value); |
4899 | ||
4900 | if (first) | |
4901 | TREE_CHAIN (last) = x; | |
4902 | else | |
4903 | first = x; | |
4904 | last = x; | |
4905 | } | |
4906 | ||
4907 | if (values == void_list_node) | |
4908 | TREE_CHAIN (last) = void_list_node; | |
4909 | ||
4910 | values = first; | |
4911 | } | |
8d08fdba | 4912 | if (context) |
f7d98d58 | 4913 | context = tsubst (context, args, in_decl); |
8d08fdba MS |
4914 | /* Could also optimize cases where return value and |
4915 | values have common elements (e.g., T min(const &T, const T&). */ | |
4916 | ||
4917 | /* If the above parameters haven't changed, just return the type. */ | |
4918 | if (type == TREE_TYPE (t) | |
4919 | && values == TYPE_VALUES (t) | |
4920 | && context == TYPE_CONTEXT (t)) | |
4921 | return t; | |
4922 | ||
4923 | /* Construct a new type node and return it. */ | |
4924 | if (TREE_CODE (t) == FUNCTION_TYPE | |
4925 | && context == NULL_TREE) | |
4926 | { | |
c11b6f21 | 4927 | fntype = build_function_type (type, values); |
8d08fdba MS |
4928 | } |
4929 | else if (context == NULL_TREE) | |
4930 | { | |
4931 | tree base = tsubst (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (t))), | |
f7d98d58 | 4932 | args, in_decl); |
c11b6f21 MS |
4933 | fntype = build_cplus_method_type (base, type, |
4934 | TREE_CHAIN (values)); | |
8d08fdba MS |
4935 | } |
4936 | else | |
4937 | { | |
c11b6f21 MS |
4938 | fntype = make_node (TREE_CODE (t)); |
4939 | TREE_TYPE (fntype) = type; | |
4940 | TYPE_CONTEXT (fntype) = context; | |
4941 | TYPE_VALUES (fntype) = values; | |
4942 | TYPE_SIZE (fntype) = TYPE_SIZE (t); | |
4943 | TYPE_ALIGN (fntype) = TYPE_ALIGN (t); | |
4944 | TYPE_MODE (fntype) = TYPE_MODE (t); | |
8d08fdba | 4945 | if (TYPE_METHOD_BASETYPE (t)) |
c11b6f21 | 4946 | TYPE_METHOD_BASETYPE (fntype) = tsubst (TYPE_METHOD_BASETYPE (t), |
f7d98d58 | 4947 | args, in_decl); |
8d08fdba MS |
4948 | /* Need to generate hash value. */ |
4949 | my_friendly_abort (84); | |
4950 | } | |
c11b6f21 MS |
4951 | fntype = build_type_variant (fntype, |
4952 | TYPE_READONLY (t), | |
4953 | TYPE_VOLATILE (t)); | |
4954 | if (raises) | |
4955 | { | |
f7d98d58 | 4956 | raises = tsubst (raises, args, in_decl); |
c11b6f21 MS |
4957 | fntype = build_exception_variant (fntype, raises); |
4958 | } | |
4959 | return fntype; | |
8d08fdba MS |
4960 | } |
4961 | case ARRAY_TYPE: | |
4962 | { | |
f7d98d58 | 4963 | tree domain = tsubst (TYPE_DOMAIN (t), args, in_decl); |
8d08fdba MS |
4964 | tree r; |
4965 | if (type == TREE_TYPE (t) && domain == TYPE_DOMAIN (t)) | |
4966 | return t; | |
4967 | r = build_cplus_array_type (type, domain); | |
4968 | return r; | |
4969 | } | |
4970 | ||
8d08fdba | 4971 | case PLUS_EXPR: |
5566b478 | 4972 | case MINUS_EXPR: |
8d08fdba | 4973 | return fold (build (TREE_CODE (t), TREE_TYPE (t), |
f7d98d58 JM |
4974 | tsubst (TREE_OPERAND (t, 0), args, in_decl), |
4975 | tsubst (TREE_OPERAND (t, 1), args, in_decl))); | |
8d08fdba MS |
4976 | |
4977 | case NEGATE_EXPR: | |
4978 | case NOP_EXPR: | |
4979 | return fold (build1 (TREE_CODE (t), TREE_TYPE (t), | |
f7d98d58 | 4980 | tsubst (TREE_OPERAND (t, 0), args, in_decl))); |
8d08fdba | 4981 | |
5566b478 MS |
4982 | case TYPENAME_TYPE: |
4983 | { | |
f7d98d58 | 4984 | tree ctx = tsubst (TYPE_CONTEXT (t), args, in_decl); |
b2b7d40a JM |
4985 | tree f = tsubst_copy (TYPENAME_TYPE_FULLNAME (t), args, in_decl); |
4986 | f = make_typename_type (ctx, f); | |
5566b478 MS |
4987 | return cp_build_type_variant |
4988 | (f, TYPE_READONLY (f) || TYPE_READONLY (t), | |
4989 | TYPE_VOLATILE (f) || TYPE_VOLATILE (t)); | |
4990 | } | |
4991 | ||
4992 | case INDIRECT_REF: | |
4993 | return make_pointer_declarator | |
f7d98d58 | 4994 | (type, tsubst (TREE_OPERAND (t, 0), args, in_decl)); |
5566b478 MS |
4995 | |
4996 | case ADDR_EXPR: | |
4997 | return make_reference_declarator | |
f7d98d58 | 4998 | (type, tsubst (TREE_OPERAND (t, 0), args, in_decl)); |
5566b478 MS |
4999 | |
5000 | case ARRAY_REF: | |
5001 | return build_parse_node | |
f7d98d58 JM |
5002 | (ARRAY_REF, tsubst (TREE_OPERAND (t, 0), args, in_decl), |
5003 | tsubst_expr (TREE_OPERAND (t, 1), args, in_decl)); | |
5566b478 MS |
5004 | |
5005 | case CALL_EXPR: | |
c11b6f21 | 5006 | return make_call_declarator |
f7d98d58 JM |
5007 | (tsubst (TREE_OPERAND (t, 0), args, in_decl), |
5008 | tsubst (TREE_OPERAND (t, 1), args, in_decl), | |
c11b6f21 | 5009 | TREE_OPERAND (t, 2), |
f7d98d58 | 5010 | tsubst (TREE_TYPE (t), args, in_decl)); |
5566b478 | 5011 | |
fc378698 MS |
5012 | case SCOPE_REF: |
5013 | return build_parse_node | |
f7d98d58 JM |
5014 | (TREE_CODE (t), tsubst (TREE_OPERAND (t, 0), args, in_decl), |
5015 | tsubst (TREE_OPERAND (t, 1), args, in_decl)); | |
fc378698 | 5016 | |
8d08fdba | 5017 | default: |
5566b478 | 5018 | sorry ("use of `%s' in template", |
8d08fdba MS |
5019 | tree_code_name [(int) TREE_CODE (t)]); |
5020 | return error_mark_node; | |
5021 | } | |
5022 | } | |
5023 | ||
5566b478 MS |
5024 | void |
5025 | do_pushlevel () | |
5026 | { | |
5027 | emit_line_note (input_filename, lineno); | |
5028 | pushlevel (0); | |
5029 | clear_last_expr (); | |
5030 | push_momentary (); | |
5031 | expand_start_bindings (0); | |
5032 | } | |
5033 | ||
8d08fdba | 5034 | tree |
5566b478 | 5035 | do_poplevel () |
8d08fdba | 5036 | { |
5566b478 | 5037 | tree t; |
a703fb38 | 5038 | int saved_warn_unused = 0; |
8d08fdba | 5039 | |
85b71cf2 JM |
5040 | if (processing_template_decl) |
5041 | { | |
5042 | saved_warn_unused = warn_unused; | |
5043 | warn_unused = 0; | |
5044 | } | |
8baa713c | 5045 | expand_end_bindings (getdecls (), kept_level_p (), 0); |
85b71cf2 JM |
5046 | if (processing_template_decl) |
5047 | warn_unused = saved_warn_unused; | |
5566b478 MS |
5048 | t = poplevel (kept_level_p (), 1, 0); |
5049 | pop_momentary (); | |
5050 | return t; | |
5051 | } | |
8d08fdba | 5052 | |
00d3396f JM |
5053 | /* Like tsubst, but deals with expressions. This function just replaces |
5054 | template parms; to finish processing the resultant expression, use | |
5055 | tsubst_expr. */ | |
5056 | ||
5566b478 | 5057 | tree |
f7d98d58 | 5058 | tsubst_copy (t, args, in_decl) |
98c1c668 | 5059 | tree t, args; |
5566b478 MS |
5060 | tree in_decl; |
5061 | { | |
5062 | enum tree_code code; | |
8d08fdba | 5063 | |
5566b478 MS |
5064 | if (t == NULL_TREE || t == error_mark_node) |
5065 | return t; | |
5066 | ||
5067 | code = TREE_CODE (t); | |
b7484fbe | 5068 | |
5566b478 MS |
5069 | switch (code) |
5070 | { | |
5071 | case PARM_DECL: | |
5072 | return do_identifier (DECL_NAME (t), 0); | |
5073 | ||
5074 | case CONST_DECL: | |
5075 | case FIELD_DECL: | |
5076 | if (DECL_CONTEXT (t)) | |
5077 | { | |
0978790f JM |
5078 | tree ctx; |
5079 | if (TREE_CODE (DECL_CONTEXT (t)) == FUNCTION_DECL) | |
b87692e5 | 5080 | return lookup_name (DECL_NAME (t), 0); |
0978790f JM |
5081 | |
5082 | ctx = tsubst (DECL_CONTEXT (t), args, in_decl); | |
5083 | if (ctx != DECL_CONTEXT (t)) | |
5566b478 MS |
5084 | return lookup_field (ctx, DECL_NAME (t), 0, 0); |
5085 | } | |
5086 | return t; | |
5087 | ||
5088 | case VAR_DECL: | |
5089 | case FUNCTION_DECL: | |
5090 | if (DECL_LANG_SPECIFIC (t) && DECL_TEMPLATE_INFO (t)) | |
f7d98d58 | 5091 | t = tsubst (t, args, in_decl); |
5566b478 MS |
5092 | mark_used (t); |
5093 | return t; | |
5094 | ||
98c1c668 JM |
5095 | case TEMPLATE_DECL: |
5096 | if (is_member_template (t)) | |
f7d98d58 | 5097 | return tsubst (t, args, in_decl); |
98c1c668 JM |
5098 | else |
5099 | return t; | |
5100 | ||
5566b478 MS |
5101 | #if 0 |
5102 | case IDENTIFIER_NODE: | |
5103 | return do_identifier (t, 0); | |
5104 | #endif | |
5105 | ||
5106 | case CAST_EXPR: | |
5107 | case REINTERPRET_CAST_EXPR: | |
e92cc029 MS |
5108 | case CONST_CAST_EXPR: |
5109 | case STATIC_CAST_EXPR: | |
5110 | case DYNAMIC_CAST_EXPR: | |
5566b478 | 5111 | return build1 |
f7d98d58 JM |
5112 | (code, tsubst (TREE_TYPE (t), args, in_decl), |
5113 | tsubst_copy (TREE_OPERAND (t, 0), args, in_decl)); | |
5566b478 MS |
5114 | |
5115 | case INDIRECT_REF: | |
5116 | case PREDECREMENT_EXPR: | |
5117 | case PREINCREMENT_EXPR: | |
5118 | case POSTDECREMENT_EXPR: | |
5119 | case POSTINCREMENT_EXPR: | |
5120 | case NEGATE_EXPR: | |
5121 | case TRUTH_NOT_EXPR: | |
b87692e5 | 5122 | case BIT_NOT_EXPR: |
5566b478 MS |
5123 | case ADDR_EXPR: |
5124 | case CONVERT_EXPR: /* Unary + */ | |
5125 | case SIZEOF_EXPR: | |
abff8e06 | 5126 | case ALIGNOF_EXPR: |
5566b478 | 5127 | case ARROW_EXPR: |
fc378698 | 5128 | case THROW_EXPR: |
5156628f | 5129 | case TYPEID_EXPR: |
5566b478 MS |
5130 | return build1 |
5131 | (code, NULL_TREE, | |
f7d98d58 | 5132 | tsubst_copy (TREE_OPERAND (t, 0), args, in_decl)); |
5566b478 MS |
5133 | |
5134 | case PLUS_EXPR: | |
5135 | case MINUS_EXPR: | |
5136 | case MULT_EXPR: | |
5137 | case TRUNC_DIV_EXPR: | |
5138 | case CEIL_DIV_EXPR: | |
5139 | case FLOOR_DIV_EXPR: | |
5140 | case ROUND_DIV_EXPR: | |
5141 | case EXACT_DIV_EXPR: | |
5142 | case BIT_AND_EXPR: | |
5143 | case BIT_ANDTC_EXPR: | |
5144 | case BIT_IOR_EXPR: | |
5145 | case BIT_XOR_EXPR: | |
5146 | case TRUNC_MOD_EXPR: | |
5147 | case FLOOR_MOD_EXPR: | |
5148 | case TRUTH_ANDIF_EXPR: | |
5149 | case TRUTH_ORIF_EXPR: | |
5150 | case TRUTH_AND_EXPR: | |
5151 | case TRUTH_OR_EXPR: | |
5152 | case RSHIFT_EXPR: | |
5153 | case LSHIFT_EXPR: | |
5154 | case RROTATE_EXPR: | |
5155 | case LROTATE_EXPR: | |
5156 | case EQ_EXPR: | |
5157 | case NE_EXPR: | |
5158 | case MAX_EXPR: | |
5159 | case MIN_EXPR: | |
5160 | case LE_EXPR: | |
5161 | case GE_EXPR: | |
5162 | case LT_EXPR: | |
5163 | case GT_EXPR: | |
5164 | case COMPONENT_REF: | |
5165 | case ARRAY_REF: | |
5166 | case COMPOUND_EXPR: | |
5167 | case SCOPE_REF: | |
5168 | case DOTSTAR_EXPR: | |
5169 | case MEMBER_REF: | |
5170 | return build_nt | |
f7d98d58 JM |
5171 | (code, tsubst_copy (TREE_OPERAND (t, 0), args, in_decl), |
5172 | tsubst_copy (TREE_OPERAND (t, 1), args, in_decl)); | |
5566b478 MS |
5173 | |
5174 | case CALL_EXPR: | |
5175 | { | |
5176 | tree fn = TREE_OPERAND (t, 0); | |
f84b4be9 | 5177 | if (is_overloaded_fn (fn)) |
f7d98d58 | 5178 | fn = tsubst_copy (get_first_fn (fn), args, in_decl); |
5566b478 | 5179 | else |
f84b4be9 | 5180 | /* Sometimes FN is a LOOKUP_EXPR. */ |
f7d98d58 | 5181 | fn = tsubst_copy (fn, args, in_decl); |
5566b478 | 5182 | return build_nt |
f7d98d58 | 5183 | (code, fn, tsubst_copy (TREE_OPERAND (t, 1), args, in_decl), |
5566b478 MS |
5184 | NULL_TREE); |
5185 | } | |
5186 | ||
5187 | case METHOD_CALL_EXPR: | |
5188 | { | |
5189 | tree name = TREE_OPERAND (t, 0); | |
5190 | if (TREE_CODE (name) == BIT_NOT_EXPR) | |
5191 | { | |
f7d98d58 | 5192 | name = tsubst_copy (TREE_OPERAND (name, 0), args, in_decl); |
7bae46f4 JM |
5193 | if (TREE_CODE (name) != IDENTIFIER_NODE) |
5194 | name = TYPE_MAIN_VARIANT (name); | |
5195 | name = build1 (BIT_NOT_EXPR, NULL_TREE, name); | |
5566b478 MS |
5196 | } |
5197 | else if (TREE_CODE (name) == SCOPE_REF | |
5198 | && TREE_CODE (TREE_OPERAND (name, 1)) == BIT_NOT_EXPR) | |
5199 | { | |
f7d98d58 | 5200 | tree base = tsubst_copy (TREE_OPERAND (name, 0), args, in_decl); |
5566b478 | 5201 | name = TREE_OPERAND (name, 1); |
f7d98d58 | 5202 | name = tsubst_copy (TREE_OPERAND (name, 0), args, in_decl); |
11686454 JM |
5203 | if (TREE_CODE (name) != IDENTIFIER_NODE) |
5204 | name = TYPE_MAIN_VARIANT (name); | |
5205 | name = build1 (BIT_NOT_EXPR, NULL_TREE, name); | |
5566b478 MS |
5206 | name = build_nt (SCOPE_REF, base, name); |
5207 | } | |
5208 | else | |
f7d98d58 | 5209 | name = tsubst_copy (TREE_OPERAND (t, 0), args, in_decl); |
5566b478 | 5210 | return build_nt |
f7d98d58 JM |
5211 | (code, name, tsubst_copy (TREE_OPERAND (t, 1), args, in_decl), |
5212 | tsubst_copy (TREE_OPERAND (t, 2), args, in_decl), | |
5566b478 MS |
5213 | NULL_TREE); |
5214 | } | |
5215 | ||
67da3287 | 5216 | case BIND_EXPR: |
5566b478 MS |
5217 | case COND_EXPR: |
5218 | case MODOP_EXPR: | |
67da3287 MM |
5219 | { |
5220 | tree r = build_nt | |
f7d98d58 JM |
5221 | (code, tsubst_copy (TREE_OPERAND (t, 0), args, in_decl), |
5222 | tsubst_copy (TREE_OPERAND (t, 1), args, in_decl), | |
5223 | tsubst_copy (TREE_OPERAND (t, 2), args, in_decl)); | |
67da3287 MM |
5224 | |
5225 | if (code == BIND_EXPR && !processing_template_decl) | |
5226 | { | |
5227 | /* This processing should really occur in tsubst_expr, | |
5228 | However, tsubst_expr does not recurse into expressions, | |
5229 | since it assumes that there aren't any statements | |
5230 | inside them. Instead, it simply calls | |
5231 | build_expr_from_tree. So, we need to expand the | |
5232 | BIND_EXPR here. */ | |
b4c4a9ec | 5233 | tree rtl_expr = begin_stmt_expr (); |
544c188d | 5234 | tree block = tsubst_expr (TREE_OPERAND (r, 1), args, in_decl); |
b4c4a9ec | 5235 | r = finish_stmt_expr (rtl_expr, block); |
67da3287 MM |
5236 | } |
5237 | ||
5238 | return r; | |
5239 | } | |
5566b478 MS |
5240 | |
5241 | case NEW_EXPR: | |
5242 | { | |
5243 | tree r = build_nt | |
f7d98d58 JM |
5244 | (code, tsubst_copy (TREE_OPERAND (t, 0), args, in_decl), |
5245 | tsubst_copy (TREE_OPERAND (t, 1), args, in_decl), | |
5246 | tsubst_copy (TREE_OPERAND (t, 2), args, in_decl)); | |
5566b478 MS |
5247 | NEW_EXPR_USE_GLOBAL (r) = NEW_EXPR_USE_GLOBAL (t); |
5248 | return r; | |
5249 | } | |
5250 | ||
5251 | case DELETE_EXPR: | |
5252 | { | |
5253 | tree r = build_nt | |
f7d98d58 JM |
5254 | (code, tsubst_copy (TREE_OPERAND (t, 0), args, in_decl), |
5255 | tsubst_copy (TREE_OPERAND (t, 1), args, in_decl)); | |
5566b478 MS |
5256 | DELETE_EXPR_USE_GLOBAL (r) = DELETE_EXPR_USE_GLOBAL (t); |
5257 | DELETE_EXPR_USE_VEC (r) = DELETE_EXPR_USE_VEC (t); | |
5258 | return r; | |
5259 | } | |
5260 | ||
386b8a85 JM |
5261 | case TEMPLATE_ID_EXPR: |
5262 | { | |
00d3396f | 5263 | /* Substituted template arguments */ |
f7d98d58 | 5264 | tree targs = tsubst_copy (TREE_OPERAND (t, 1), args, in_decl); |
00d3396f JM |
5265 | tree chain; |
5266 | for (chain = targs; chain; chain = TREE_CHAIN (chain)) | |
5267 | TREE_VALUE (chain) = maybe_fold_nontype_arg (TREE_VALUE (chain)); | |
5268 | ||
5269 | return lookup_template_function | |
f7d98d58 | 5270 | (tsubst_copy (TREE_OPERAND (t, 0), args, in_decl), targs); |
386b8a85 JM |
5271 | } |
5272 | ||
5566b478 MS |
5273 | case TREE_LIST: |
5274 | { | |
5275 | tree purpose, value, chain; | |
5276 | ||
5277 | if (t == void_list_node) | |
5278 | return t; | |
5279 | ||
5280 | purpose = TREE_PURPOSE (t); | |
5281 | if (purpose) | |
f7d98d58 | 5282 | purpose = tsubst_copy (purpose, args, in_decl); |
5566b478 MS |
5283 | value = TREE_VALUE (t); |
5284 | if (value) | |
f7d98d58 | 5285 | value = tsubst_copy (value, args, in_decl); |
5566b478 MS |
5286 | chain = TREE_CHAIN (t); |
5287 | if (chain && chain != void_type_node) | |
f7d98d58 | 5288 | chain = tsubst_copy (chain, args, in_decl); |
5566b478 MS |
5289 | if (purpose == TREE_PURPOSE (t) |
5290 | && value == TREE_VALUE (t) | |
5291 | && chain == TREE_CHAIN (t)) | |
5292 | return t; | |
5293 | return tree_cons (purpose, value, chain); | |
5294 | } | |
5295 | ||
5296 | case RECORD_TYPE: | |
5297 | case UNION_TYPE: | |
5298 | case ENUMERAL_TYPE: | |
5299 | case INTEGER_TYPE: | |
5300 | case TEMPLATE_TYPE_PARM: | |
73b0fce8 | 5301 | case TEMPLATE_TEMPLATE_PARM: |
f84b4be9 | 5302 | case TEMPLATE_PARM_INDEX: |
5566b478 MS |
5303 | case POINTER_TYPE: |
5304 | case REFERENCE_TYPE: | |
5305 | case OFFSET_TYPE: | |
5306 | case FUNCTION_TYPE: | |
5307 | case METHOD_TYPE: | |
5308 | case ARRAY_TYPE: | |
5309 | case TYPENAME_TYPE: | |
f84b4be9 | 5310 | case TYPE_DECL: |
f7d98d58 | 5311 | return tsubst (t, args, in_decl); |
5566b478 | 5312 | |
e92cc029 MS |
5313 | case IDENTIFIER_NODE: |
5314 | if (IDENTIFIER_TYPENAME_P (t)) | |
5315 | return build_typename_overload | |
f7d98d58 | 5316 | (tsubst (TREE_TYPE (t), args, in_decl)); |
e92cc029 MS |
5317 | else |
5318 | return t; | |
5319 | ||
5156628f MS |
5320 | case CONSTRUCTOR: |
5321 | return build | |
f7d98d58 JM |
5322 | (CONSTRUCTOR, tsubst (TREE_TYPE (t), args, in_decl), NULL_TREE, |
5323 | tsubst_copy (CONSTRUCTOR_ELTS (t), args, in_decl)); | |
5156628f | 5324 | |
5566b478 MS |
5325 | default: |
5326 | return t; | |
5327 | } | |
5328 | } | |
5329 | ||
00d3396f JM |
5330 | /* Like tsubst_copy, but also does semantic processing and RTL expansion. */ |
5331 | ||
5566b478 | 5332 | tree |
f7d98d58 | 5333 | tsubst_expr (t, args, in_decl) |
98c1c668 | 5334 | tree t, args; |
5566b478 MS |
5335 | tree in_decl; |
5336 | { | |
5337 | if (t == NULL_TREE || t == error_mark_node) | |
5338 | return t; | |
5339 | ||
5156628f | 5340 | if (processing_template_decl) |
f7d98d58 | 5341 | return tsubst_copy (t, args, in_decl); |
5566b478 MS |
5342 | |
5343 | switch (TREE_CODE (t)) | |
8d08fdba | 5344 | { |
5566b478 MS |
5345 | case RETURN_STMT: |
5346 | lineno = TREE_COMPLEXITY (t); | |
ad321293 MM |
5347 | finish_return_stmt (tsubst_expr (RETURN_EXPR (t), |
5348 | args, in_decl)); | |
5566b478 MS |
5349 | break; |
5350 | ||
5351 | case EXPR_STMT: | |
5352 | lineno = TREE_COMPLEXITY (t); | |
ad321293 MM |
5353 | finish_expr_stmt (tsubst_expr (EXPR_STMT_EXPR (t), |
5354 | args, in_decl)); | |
5566b478 MS |
5355 | break; |
5356 | ||
5357 | case DECL_STMT: | |
5358 | { | |
5359 | int i = suspend_momentary (); | |
67d743fe | 5360 | tree dcl, init; |
5566b478 MS |
5361 | |
5362 | lineno = TREE_COMPLEXITY (t); | |
5363 | emit_line_note (input_filename, lineno); | |
5364 | dcl = start_decl | |
f7d98d58 JM |
5365 | (tsubst (TREE_OPERAND (t, 0), args, in_decl), |
5366 | tsubst (TREE_OPERAND (t, 1), args, in_decl), | |
a1774733 | 5367 | TREE_OPERAND (t, 2) != 0, NULL_TREE, NULL_TREE); |
f7d98d58 | 5368 | init = tsubst_expr (TREE_OPERAND (t, 2), args, in_decl); |
5566b478 | 5369 | cp_finish_decl |
a0128b67 | 5370 | (dcl, init, NULL_TREE, 1, /*init ? LOOKUP_ONLYCONVERTING :*/ 0); |
5566b478 MS |
5371 | resume_momentary (i); |
5372 | return dcl; | |
5373 | } | |
8d08fdba | 5374 | |
5566b478 MS |
5375 | case FOR_STMT: |
5376 | { | |
5377 | tree tmp; | |
5566b478 | 5378 | lineno = TREE_COMPLEXITY (t); |
5566b478 | 5379 | |
ad321293 MM |
5380 | begin_for_stmt (); |
5381 | for (tmp = FOR_INIT_STMT (t); tmp; tmp = TREE_CHAIN (tmp)) | |
5382 | tsubst_expr (tmp, args, in_decl); | |
5383 | finish_for_init_stmt (NULL_TREE); | |
5384 | finish_for_cond (tsubst_expr (FOR_COND (t), args, | |
5385 | in_decl), | |
5386 | NULL_TREE); | |
5387 | tmp = tsubst_expr (FOR_EXPR (t), args, in_decl); | |
5388 | finish_for_expr (tmp, NULL_TREE); | |
5389 | tsubst_expr (FOR_BODY (t), args, in_decl); | |
5390 | finish_for_stmt (tmp, NULL_TREE); | |
5566b478 MS |
5391 | } |
5392 | break; | |
8d08fdba | 5393 | |
5566b478 MS |
5394 | case WHILE_STMT: |
5395 | { | |
5566b478 | 5396 | lineno = TREE_COMPLEXITY (t); |
ad321293 MM |
5397 | begin_while_stmt (); |
5398 | finish_while_stmt_cond (tsubst_expr (WHILE_COND (t), | |
5399 | args, in_decl), | |
5400 | NULL_TREE); | |
5401 | tsubst_expr (WHILE_BODY (t), args, in_decl); | |
5402 | finish_while_stmt (NULL_TREE); | |
5566b478 MS |
5403 | } |
5404 | break; | |
8d08fdba | 5405 | |
5566b478 MS |
5406 | case DO_STMT: |
5407 | { | |
5566b478 | 5408 | lineno = TREE_COMPLEXITY (t); |
ad321293 MM |
5409 | begin_do_stmt (); |
5410 | tsubst_expr (DO_BODY (t), args, in_decl); | |
5411 | finish_do_body (NULL_TREE); | |
5412 | finish_do_stmt (tsubst_expr (DO_COND (t), args, | |
5413 | in_decl), | |
5414 | NULL_TREE); | |
5566b478 MS |
5415 | } |
5416 | break; | |
a0a33927 | 5417 | |
5566b478 | 5418 | case IF_STMT: |
8d08fdba | 5419 | { |
5566b478 | 5420 | tree tmp; |
5566b478 MS |
5421 | |
5422 | lineno = TREE_COMPLEXITY (t); | |
ad321293 MM |
5423 | begin_if_stmt (); |
5424 | finish_if_stmt_cond (tsubst_expr (IF_COND (t), | |
5425 | args, in_decl), | |
5426 | NULL_TREE); | |
db5ae43f | 5427 | |
ad321293 | 5428 | if (tmp = THEN_CLAUSE (t), tmp) |
db5ae43f | 5429 | { |
f7d98d58 | 5430 | tsubst_expr (tmp, args, in_decl); |
ad321293 | 5431 | finish_then_clause (NULL_TREE); |
db5ae43f MS |
5432 | } |
5433 | ||
ad321293 MM |
5434 | if (tmp = ELSE_CLAUSE (t), tmp) |
5435 | { | |
5436 | begin_else_clause (); | |
5437 | tsubst_expr (tmp, args, in_decl); | |
5438 | finish_else_clause (NULL_TREE); | |
5439 | } | |
8d08fdba | 5440 | |
ad321293 | 5441 | finish_if_stmt (); |
8d08fdba | 5442 | } |
5566b478 | 5443 | break; |
8d08fdba | 5444 | |
5566b478 MS |
5445 | case COMPOUND_STMT: |
5446 | { | |
ad321293 | 5447 | tree substmt; |
8d08fdba | 5448 | |
5566b478 | 5449 | lineno = TREE_COMPLEXITY (t); |
ad321293 MM |
5450 | begin_compound_stmt (COMPOUND_STMT_NO_SCOPE (t)); |
5451 | for (substmt = COMPOUND_BODY (t); | |
5452 | substmt != NULL_TREE; | |
5453 | substmt = TREE_CHAIN (substmt)) | |
f7d98d58 | 5454 | tsubst_expr (substmt, args, in_decl); |
ad321293 MM |
5455 | return finish_compound_stmt (COMPOUND_STMT_NO_SCOPE (t), |
5456 | NULL_TREE); | |
5566b478 MS |
5457 | } |
5458 | break; | |
8d08fdba | 5459 | |
5566b478 MS |
5460 | case BREAK_STMT: |
5461 | lineno = TREE_COMPLEXITY (t); | |
ad321293 | 5462 | finish_break_stmt (); |
5566b478 | 5463 | break; |
8d08fdba | 5464 | |
6467930b MS |
5465 | case CONTINUE_STMT: |
5466 | lineno = TREE_COMPLEXITY (t); | |
ad321293 | 5467 | finish_continue_stmt (); |
6467930b MS |
5468 | break; |
5469 | ||
5566b478 MS |
5470 | case SWITCH_STMT: |
5471 | { | |
5472 | tree val, tmp; | |
5566b478 MS |
5473 | |
5474 | lineno = TREE_COMPLEXITY (t); | |
ad321293 MM |
5475 | begin_switch_stmt (); |
5476 | val = tsubst_expr (SWITCH_COND (t), args, in_decl); | |
5477 | finish_switch_cond (val); | |
5566b478 MS |
5478 | |
5479 | if (tmp = TREE_OPERAND (t, 1), tmp) | |
f7d98d58 | 5480 | tsubst_expr (tmp, args, in_decl); |
8d08fdba | 5481 | |
ad321293 | 5482 | finish_switch_stmt (val, NULL_TREE); |
5566b478 MS |
5483 | } |
5484 | break; | |
5485 | ||
5486 | case CASE_LABEL: | |
ad321293 MM |
5487 | finish_case_label (tsubst_expr (CASE_LOW (t), args, in_decl), |
5488 | tsubst_expr (CASE_HIGH (t), args, in_decl)); | |
5566b478 MS |
5489 | break; |
5490 | ||
5491 | case LABEL_DECL: | |
5492 | t = define_label (DECL_SOURCE_FILE (t), DECL_SOURCE_LINE (t), | |
5493 | DECL_NAME (t)); | |
5494 | if (t) | |
5495 | expand_label (t); | |
5496 | break; | |
5497 | ||
5498 | case GOTO_STMT: | |
5499 | lineno = TREE_COMPLEXITY (t); | |
aa09da44 MM |
5500 | t = GOTO_DESTINATION (t); |
5501 | if (TREE_CODE (t) != IDENTIFIER_NODE) | |
5502 | /* Computed goto's must be tsubst'd into. On the other hand, | |
5503 | non-computed gotos must not be; the identifier in question | |
5504 | will have no binding. */ | |
5505 | t = tsubst_expr (t, args, in_decl); | |
5506 | finish_goto_stmt (t); | |
ad321293 MM |
5507 | break; |
5508 | ||
5509 | case ASM_STMT: | |
5510 | lineno = TREE_COMPLEXITY (t); | |
5511 | finish_asm_stmt (tsubst_expr (ASM_CV_QUAL (t), args, in_decl), | |
5512 | tsubst_expr (ASM_STRING (t), args, in_decl), | |
5513 | tsubst_expr (ASM_OUTPUTS (t), args, in_decl), | |
5514 | tsubst_expr (ASM_INPUTS (t), args, in_decl), | |
5515 | tsubst_expr (ASM_CLOBBERS (t), args, in_decl)); | |
5566b478 | 5516 | break; |
faf5394a MS |
5517 | |
5518 | case TRY_BLOCK: | |
5519 | lineno = TREE_COMPLEXITY (t); | |
ad321293 MM |
5520 | begin_try_block (); |
5521 | tsubst_expr (TRY_STMTS (t), args, in_decl); | |
5522 | finish_try_block (NULL_TREE); | |
faf5394a | 5523 | { |
ad321293 | 5524 | tree handler = TRY_HANDLERS (t); |
faf5394a | 5525 | for (; handler; handler = TREE_CHAIN (handler)) |
f7d98d58 | 5526 | tsubst_expr (handler, args, in_decl); |
faf5394a | 5527 | } |
ad321293 | 5528 | finish_handler_sequence (NULL_TREE); |
faf5394a MS |
5529 | break; |
5530 | ||
5531 | case HANDLER: | |
5532 | lineno = TREE_COMPLEXITY (t); | |
ad321293 MM |
5533 | begin_handler (); |
5534 | if (HANDLER_PARMS (t)) | |
faf5394a | 5535 | { |
ad321293 | 5536 | tree d = HANDLER_PARMS (t); |
faf5394a | 5537 | expand_start_catch_block |
f7d98d58 JM |
5538 | (tsubst (TREE_OPERAND (d, 1), args, in_decl), |
5539 | tsubst (TREE_OPERAND (d, 0), args, in_decl)); | |
faf5394a MS |
5540 | } |
5541 | else | |
5542 | expand_start_catch_block (NULL_TREE, NULL_TREE); | |
ad321293 MM |
5543 | finish_handler_parms (NULL_TREE); |
5544 | tsubst_expr (HANDLER_BODY (t), args, in_decl); | |
5545 | finish_handler (NULL_TREE); | |
faf5394a MS |
5546 | break; |
5547 | ||
b87692e5 MS |
5548 | case TAG_DEFN: |
5549 | lineno = TREE_COMPLEXITY (t); | |
5550 | t = TREE_TYPE (t); | |
5551 | if (TREE_CODE (t) == ENUMERAL_TYPE) | |
f7d98d58 | 5552 | tsubst_enum (t, args, NULL); |
b87692e5 MS |
5553 | break; |
5554 | ||
5566b478 | 5555 | default: |
f7d98d58 | 5556 | return build_expr_from_tree (tsubst_copy (t, args, in_decl)); |
5566b478 MS |
5557 | } |
5558 | return NULL_TREE; | |
8d08fdba MS |
5559 | } |
5560 | ||
5566b478 MS |
5561 | tree |
5562 | instantiate_template (tmpl, targ_ptr) | |
98c1c668 | 5563 | tree tmpl, targ_ptr; |
8d08fdba | 5564 | { |
5566b478 MS |
5565 | tree fndecl; |
5566 | int i, len; | |
5567 | struct obstack *old_fmp_obstack; | |
5568 | extern struct obstack *function_maybepermanent_obstack; | |
5569 | ||
27fafc8d JM |
5570 | if (tmpl == error_mark_node) |
5571 | return error_mark_node; | |
5572 | ||
386b8a85 JM |
5573 | my_friendly_assert (TREE_CODE (tmpl) == TEMPLATE_DECL, 283); |
5574 | ||
f84b4be9 JM |
5575 | /* FIXME this won't work with member templates; we only have one level |
5576 | of args here. */ | |
386b8a85 JM |
5577 | if (DECL_FUNCTION_TEMPLATE_P (tmpl)) |
5578 | { | |
75650646 MM |
5579 | /* Check to see if we already have this specialization. */ |
5580 | tree spec = retrieve_specialization (tmpl, targ_ptr); | |
386b8a85 | 5581 | |
75650646 MM |
5582 | if (spec != NULL_TREE) |
5583 | return spec; | |
386b8a85 JM |
5584 | } |
5585 | ||
5566b478 MS |
5586 | push_obstacks (&permanent_obstack, &permanent_obstack); |
5587 | old_fmp_obstack = function_maybepermanent_obstack; | |
5588 | function_maybepermanent_obstack = &permanent_obstack; | |
8d08fdba | 5589 | |
98c1c668 | 5590 | len = DECL_NTPARMS (tmpl); |
8d08fdba | 5591 | |
5566b478 MS |
5592 | i = len; |
5593 | while (i--) | |
8d08fdba | 5594 | { |
98c1c668 | 5595 | tree t = TREE_VEC_ELT (targ_ptr, i); |
5566b478 MS |
5596 | if (TREE_CODE_CLASS (TREE_CODE (t)) == 't') |
5597 | { | |
5598 | tree nt = target_type (t); | |
ec255269 | 5599 | if (IS_AGGR_TYPE (nt) && decl_function_context (TYPE_MAIN_DECL (nt))) |
5566b478 MS |
5600 | { |
5601 | cp_error ("type `%T' composed from a local class is not a valid template-argument", t); | |
5602 | cp_error (" trying to instantiate `%D'", tmpl); | |
5603 | fndecl = error_mark_node; | |
5604 | goto out; | |
5605 | } | |
5606 | } | |
98c1c668 | 5607 | TREE_VEC_ELT (targ_ptr, i) = copy_to_permanent (t); |
8d08fdba | 5608 | } |
e66d884e | 5609 | targ_ptr = copy_to_permanent (targ_ptr); |
8d08fdba | 5610 | |
5566b478 | 5611 | /* substitute template parameters */ |
f7d98d58 | 5612 | fndecl = tsubst (DECL_RESULT (tmpl), targ_ptr, tmpl); |
8d08fdba | 5613 | |
824b9a4c MS |
5614 | if (flag_external_templates) |
5615 | add_pending_template (fndecl); | |
5616 | ||
5566b478 MS |
5617 | out: |
5618 | function_maybepermanent_obstack = old_fmp_obstack; | |
5619 | pop_obstacks (); | |
8d08fdba | 5620 | |
5566b478 | 5621 | return fndecl; |
8d08fdba | 5622 | } |
5566b478 MS |
5623 | |
5624 | /* Push the name of the class template into the scope of the instantiation. */ | |
8d08fdba MS |
5625 | |
5626 | void | |
5566b478 MS |
5627 | overload_template_name (type) |
5628 | tree type; | |
8d08fdba | 5629 | { |
5566b478 MS |
5630 | tree id = DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)); |
5631 | tree decl; | |
8d08fdba | 5632 | |
5566b478 MS |
5633 | if (IDENTIFIER_CLASS_VALUE (id) |
5634 | && TREE_TYPE (IDENTIFIER_CLASS_VALUE (id)) == type) | |
5635 | return; | |
8d08fdba | 5636 | |
5566b478 MS |
5637 | decl = build_decl (TYPE_DECL, id, type); |
5638 | SET_DECL_ARTIFICIAL (decl); | |
5639 | pushdecl_class_level (decl); | |
8d08fdba MS |
5640 | } |
5641 | ||
d7684f2d | 5642 | |
956d6950 | 5643 | /* Like type_unification but designed specially to handle conversion |
d7684f2d MM |
5644 | operators. The EXTRA_FN_ARG, if any, is the type of an additional |
5645 | parameter to be added to the beginning of FN's parameter list. */ | |
98c1c668 JM |
5646 | |
5647 | int | |
d7684f2d MM |
5648 | fn_type_unification (fn, explicit_targs, targs, args, return_type, |
5649 | strict, extra_fn_arg) | |
386b8a85 | 5650 | tree fn, explicit_targs, targs, args, return_type; |
830bfa74 | 5651 | unification_kind_t strict; |
d7684f2d | 5652 | tree extra_fn_arg; |
98c1c668 | 5653 | { |
3b3ba9f0 | 5654 | int i; |
98c1c668 JM |
5655 | tree fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (fn)); |
5656 | tree decl_arg_types = args; | |
5657 | ||
5658 | my_friendly_assert (TREE_CODE (fn) == TEMPLATE_DECL, 0); | |
5659 | ||
5660 | if (IDENTIFIER_TYPENAME_P (DECL_NAME (fn))) | |
5661 | { | |
5662 | /* This is a template conversion operator. Use the return types | |
5663 | as well as the argument types. */ | |
e66d884e | 5664 | fn_arg_types = scratch_tree_cons (NULL_TREE, |
d7684f2d MM |
5665 | TREE_TYPE (TREE_TYPE (fn)), |
5666 | fn_arg_types); | |
e66d884e | 5667 | decl_arg_types = scratch_tree_cons (NULL_TREE, |
d7684f2d MM |
5668 | return_type, |
5669 | decl_arg_types); | |
98c1c668 JM |
5670 | } |
5671 | ||
d7684f2d MM |
5672 | if (extra_fn_arg != NULL_TREE) |
5673 | fn_arg_types = scratch_tree_cons (NULL_TREE, extra_fn_arg, | |
5674 | fn_arg_types); | |
5675 | ||
7cd55873 MM |
5676 | /* We allow incomplete unification without an error message here |
5677 | because the standard doesn't seem to explicitly prohibit it. Our | |
5678 | callers must be ready to deal with unification failures in any | |
5679 | event. */ | |
98c1c668 | 5680 | i = type_unification (DECL_INNERMOST_TEMPLATE_PARMS (fn), |
050367a3 | 5681 | targs, |
98c1c668 JM |
5682 | fn_arg_types, |
5683 | decl_arg_types, | |
386b8a85 | 5684 | explicit_targs, |
7cd55873 | 5685 | strict, 1); |
98c1c668 JM |
5686 | |
5687 | return i; | |
5688 | } | |
5689 | ||
5690 | ||
8d08fdba MS |
5691 | /* Type unification. |
5692 | ||
5693 | We have a function template signature with one or more references to | |
5694 | template parameters, and a parameter list we wish to fit to this | |
5695 | template. If possible, produce a list of parameters for the template | |
5696 | which will cause it to fit the supplied parameter list. | |
5697 | ||
5698 | Return zero for success, 2 for an incomplete match that doesn't resolve | |
5699 | all the types, and 1 for complete failure. An error message will be | |
5700 | printed only for an incomplete match. | |
5701 | ||
5702 | TPARMS[NTPARMS] is an array of template parameter types; | |
5703 | TARGS[NTPARMS] is the array of template parameter values. PARMS is | |
5704 | the function template's signature (using TEMPLATE_PARM_IDX nodes), | |
5705 | and ARGS is the argument list we're trying to match against it. | |
5706 | ||
5707 | If SUBR is 1, we're being called recursively (to unify the arguments of | |
5708 | a function or method parameter of a function template), so don't zero | |
6467930b MS |
5709 | out targs and don't fail on an incomplete match. |
5710 | ||
830bfa74 MM |
5711 | The parameter STRICT is one of: |
5712 | ||
5713 | DEDUCE_CALL: | |
5714 | We are deducing arguments for a function call, as in | |
5715 | [temp.deduct.call]. | |
5716 | ||
5717 | DEDUCE_CONV: | |
5718 | We are deducing arguments for a conversion function, as in | |
5719 | [temp.deduct.conv]. | |
5720 | ||
5721 | DEDUCE_EXACT: | |
5722 | We are deducing arguments when calculating the partial | |
5723 | ordering between specializations of function or class | |
5724 | templates, as in [temp.func.order] and [temp.class.order], | |
5725 | when doing an explicit instantiation as in [temp.explicit], | |
5726 | when determiningan explicit specialization as in | |
5727 | [temp.expl.spec], or when taking the address of a function | |
5728 | template, as in [temp.deduct.funcaddr]. */ | |
8d08fdba MS |
5729 | |
5730 | int | |
3b3ba9f0 | 5731 | type_unification (tparms, targs, parms, args, targs_in, |
386b8a85 | 5732 | strict, allow_incomplete) |
050367a3 | 5733 | tree tparms, targs, parms, args, targs_in; |
830bfa74 MM |
5734 | unification_kind_t strict; |
5735 | int allow_incomplete; | |
386b8a85 | 5736 | { |
050367a3 | 5737 | int* explicit_mask; |
386b8a85 | 5738 | int i; |
386b8a85 | 5739 | |
830bfa74 | 5740 | for (i = 0; i < TREE_VEC_LENGTH (tparms); i++) |
050367a3 | 5741 | TREE_VEC_ELT (targs, i) = NULL_TREE; |
386b8a85 | 5742 | |
75650646 MM |
5743 | if (targs_in != NULL_TREE) |
5744 | { | |
5745 | tree arg_vec; | |
5746 | arg_vec = coerce_template_parms (tparms, targs_in, NULL_TREE, 0, | |
de575009 | 5747 | 0, 0); |
75650646 MM |
5748 | |
5749 | if (arg_vec == error_mark_node) | |
5750 | return 1; | |
386b8a85 | 5751 | |
050367a3 | 5752 | explicit_mask = alloca (sizeof (int) * TREE_VEC_LENGTH (targs)); |
7dee3f36 | 5753 | bzero ((char *) explicit_mask, sizeof(int) * TREE_VEC_LENGTH (targs)); |
050367a3 | 5754 | |
75650646 MM |
5755 | for (i = 0; |
5756 | i < TREE_VEC_LENGTH (arg_vec) | |
050367a3 | 5757 | && TREE_VEC_ELT (arg_vec, i) != NULL_TREE; |
75650646 | 5758 | ++i) |
050367a3 MM |
5759 | { |
5760 | TREE_VEC_ELT (targs, i) = TREE_VEC_ELT (arg_vec, i); | |
5761 | /* Let unify know that this argument was explicit. */ | |
5762 | explicit_mask [i] = 1; | |
5763 | } | |
75650646 | 5764 | } |
050367a3 MM |
5765 | else |
5766 | explicit_mask = 0; | |
386b8a85 | 5767 | |
830bfa74 MM |
5768 | return |
5769 | type_unification_real (tparms, targs, parms, args, 0, | |
5770 | strict, allow_incomplete, explicit_mask); | |
5771 | } | |
5772 | ||
5773 | /* Adjust types before performing type deduction, as described in | |
5774 | [temp.deduct.call] and [temp.deduct.conv]. The rules in these two | |
4c7d0dff MM |
5775 | sections are symmetric. PARM is the type of a function parameter |
5776 | or the return type of the conversion function. ARG is the type of | |
5777 | the argument passed to the call, or the type of the value | |
5778 | intialized with the result of the conversion function. */ | |
386b8a85 | 5779 | |
830bfa74 MM |
5780 | void |
5781 | maybe_adjust_types_for_deduction (strict, parm, arg) | |
5782 | unification_kind_t strict; | |
5783 | tree* parm; | |
5784 | tree* arg; | |
5785 | { | |
5786 | switch (strict) | |
5787 | { | |
5788 | case DEDUCE_CALL: | |
5789 | break; | |
5790 | ||
5791 | case DEDUCE_CONV: | |
5792 | { | |
4c7d0dff MM |
5793 | /* Swap PARM and ARG throughout the remainder of this |
5794 | function; the handling is precisely symmetric since PARM | |
5795 | will initialize ARG rather than vice versa. */ | |
830bfa74 MM |
5796 | tree* temp = parm; |
5797 | parm = arg; | |
5798 | arg = temp; | |
5799 | break; | |
5800 | } | |
5801 | ||
5802 | case DEDUCE_EXACT: | |
5803 | /* There is nothing to do in this case. */ | |
5804 | return; | |
5805 | ||
5806 | default: | |
5807 | my_friendly_abort (0); | |
5808 | } | |
5809 | ||
5810 | if (TREE_CODE (*parm) != REFERENCE_TYPE) | |
5811 | { | |
5812 | /* [temp.deduct.call] | |
5813 | ||
5814 | If P is not a reference type: | |
5815 | ||
5816 | --If A is an array type, the pointer type produced by the | |
5817 | array-to-pointer standard conversion (_conv.array_) is | |
5818 | used in place of A for type deduction; otherwise, | |
5819 | ||
5820 | --If A is a function type, the pointer type produced by | |
5821 | the function-to-pointer standard conversion | |
5822 | (_conv.func_) is used in place of A for type deduction; | |
5823 | otherwise, | |
5824 | ||
5825 | --If A is a cv-qualified type, the top level | |
5826 | cv-qualifiers of A's type are ignored for type | |
5827 | deduction. */ | |
5828 | if (TREE_CODE (*arg) == ARRAY_TYPE) | |
5829 | *arg = build_pointer_type (TREE_TYPE (*arg)); | |
5830 | else if (TREE_CODE (*arg) == FUNCTION_TYPE | |
5831 | || TREE_CODE (*arg) == METHOD_TYPE) | |
5832 | *arg = build_pointer_type (*arg); | |
5833 | else | |
5834 | *arg = TYPE_MAIN_VARIANT (*arg); | |
5835 | } | |
5836 | ||
5837 | /* [temp.deduct.call] | |
5838 | ||
5839 | If P is a cv-qualified type, the top level cv-qualifiers | |
5840 | of P's type are ignored for type deduction. If P is a | |
5841 | reference type, the type referred to by P is used for | |
5842 | type deduction. */ | |
5843 | *parm = TYPE_MAIN_VARIANT (*parm); | |
5844 | if (TREE_CODE (*parm) == REFERENCE_TYPE) | |
5845 | *parm = TREE_TYPE (*parm); | |
386b8a85 JM |
5846 | } |
5847 | ||
050367a3 MM |
5848 | /* Like type_unfication. EXPLICIT_MASK, if non-NULL, is an array of |
5849 | integers, with ones in positions corresponding to arguments in | |
5850 | targs that were provided explicitly, and zeros elsewhere. */ | |
386b8a85 | 5851 | |
4966381a | 5852 | static int |
3b3ba9f0 | 5853 | type_unification_real (tparms, targs, parms, args, subr, |
050367a3 MM |
5854 | strict, allow_incomplete, explicit_mask) |
5855 | tree tparms, targs, parms, args; | |
830bfa74 MM |
5856 | int subr; |
5857 | unification_kind_t strict; | |
5858 | int allow_incomplete; | |
050367a3 | 5859 | int* explicit_mask; |
8d08fdba MS |
5860 | { |
5861 | tree parm, arg; | |
5862 | int i; | |
5863 | int ntparms = TREE_VEC_LENGTH (tparms); | |
830bfa74 | 5864 | int sub_strict; |
8d08fdba MS |
5865 | |
5866 | my_friendly_assert (TREE_CODE (tparms) == TREE_VEC, 289); | |
386b8a85 JM |
5867 | my_friendly_assert (parms == NULL_TREE |
5868 | || TREE_CODE (parms) == TREE_LIST, 290); | |
51c184be | 5869 | /* ARGS could be NULL (via a call from parse.y to |
8d08fdba MS |
5870 | build_x_function_call). */ |
5871 | if (args) | |
5872 | my_friendly_assert (TREE_CODE (args) == TREE_LIST, 291); | |
5873 | my_friendly_assert (ntparms > 0, 292); | |
5874 | ||
830bfa74 MM |
5875 | switch (strict) |
5876 | { | |
5877 | case DEDUCE_CALL: | |
5878 | sub_strict = UNIFY_ALLOW_MORE_CV_QUAL | UNIFY_ALLOW_DERIVED; | |
5879 | break; | |
5880 | ||
5881 | case DEDUCE_CONV: | |
5882 | sub_strict = UNIFY_ALLOW_LESS_CV_QUAL; | |
5883 | break; | |
5884 | ||
5885 | case DEDUCE_EXACT: | |
5886 | sub_strict = UNIFY_ALLOW_NONE; | |
5887 | break; | |
5888 | ||
5889 | default: | |
5890 | my_friendly_abort (0); | |
5891 | } | |
5892 | ||
8d08fdba MS |
5893 | while (parms |
5894 | && parms != void_list_node | |
5895 | && args | |
5896 | && args != void_list_node) | |
5897 | { | |
5898 | parm = TREE_VALUE (parms); | |
5899 | parms = TREE_CHAIN (parms); | |
5900 | arg = TREE_VALUE (args); | |
5901 | args = TREE_CHAIN (args); | |
5902 | ||
5903 | if (arg == error_mark_node) | |
5904 | return 1; | |
5905 | if (arg == unknown_type_node) | |
5906 | return 1; | |
b7484fbe | 5907 | |
03e70705 JM |
5908 | /* Conversions will be performed on a function argument that |
5909 | corresponds with a function parameter that contains only | |
5910 | non-deducible template parameters and explicitly specified | |
5911 | template parameters. */ | |
5912 | if (! uses_template_parms (parm)) | |
b7484fbe | 5913 | { |
03e70705 JM |
5914 | tree type; |
5915 | ||
5916 | if (TREE_CODE_CLASS (TREE_CODE (arg)) != 't') | |
5917 | type = TREE_TYPE (arg); | |
5918 | else | |
5919 | { | |
5920 | type = arg; | |
5921 | arg = NULL_TREE; | |
5922 | } | |
5923 | ||
830bfa74 | 5924 | if (strict == DEDUCE_EXACT) |
03e70705 JM |
5925 | { |
5926 | if (comptypes (parm, type, 1)) | |
5927 | continue; | |
5928 | } | |
03e70705 | 5929 | else |
343c89cd JM |
5930 | /* It might work; we shouldn't check now, because we might |
5931 | get into infinite recursion. Overload resolution will | |
5932 | handle it. */ | |
5933 | continue; | |
03e70705 | 5934 | |
b7484fbe MS |
5935 | return 1; |
5936 | } | |
5937 | ||
8d08fdba MS |
5938 | #if 0 |
5939 | if (TREE_CODE (arg) == VAR_DECL) | |
5940 | arg = TREE_TYPE (arg); | |
5941 | else if (TREE_CODE_CLASS (TREE_CODE (arg)) == 'e') | |
5942 | arg = TREE_TYPE (arg); | |
5943 | #else | |
5944 | if (TREE_CODE_CLASS (TREE_CODE (arg)) != 't') | |
5945 | { | |
5946 | my_friendly_assert (TREE_TYPE (arg) != NULL_TREE, 293); | |
2c73f9f5 ML |
5947 | if (TREE_CODE (arg) == OVERLOAD |
5948 | && TREE_CODE (OVL_FUNCTION (arg)) == TEMPLATE_DECL) | |
28cbf42c | 5949 | { |
050367a3 | 5950 | tree targs; |
830bfa74 | 5951 | tree arg_type; |
28cbf42c MS |
5952 | |
5953 | /* Have to back unify here */ | |
2c73f9f5 | 5954 | arg = OVL_FUNCTION (arg); |
830bfa74 MM |
5955 | targs = make_scratch_vec (DECL_NTPARMS (arg)); |
5956 | arg_type = TREE_TYPE (arg); | |
5957 | maybe_adjust_types_for_deduction (strict, &parm, &arg_type); | |
e66d884e | 5958 | parm = expr_tree_cons (NULL_TREE, parm, NULL_TREE); |
830bfa74 | 5959 | arg_type = scratch_tree_cons (NULL_TREE, arg_type, NULL_TREE); |
386b8a85 JM |
5960 | return |
5961 | type_unification (DECL_INNERMOST_TEMPLATE_PARMS (arg), | |
830bfa74 MM |
5962 | targs, arg_type, parm, NULL_TREE, |
5963 | DEDUCE_EXACT, allow_incomplete); | |
28cbf42c | 5964 | } |
8d08fdba MS |
5965 | arg = TREE_TYPE (arg); |
5966 | } | |
5967 | #endif | |
5c0ad672 JM |
5968 | if (! flag_ansi && arg == TREE_TYPE (null_node)) |
5969 | { | |
5970 | warning ("using type void* for NULL"); | |
5971 | arg = ptr_type_node; | |
5972 | } | |
5973 | ||
830bfa74 MM |
5974 | if (!subr) |
5975 | maybe_adjust_types_for_deduction (strict, &parm, &arg); | |
db5ae43f | 5976 | |
830bfa74 | 5977 | switch (unify (tparms, targs, parm, arg, sub_strict, |
050367a3 | 5978 | explicit_mask)) |
8d08fdba MS |
5979 | { |
5980 | case 0: | |
5981 | break; | |
5982 | case 1: | |
5983 | return 1; | |
5984 | } | |
5985 | } | |
5986 | /* Fail if we've reached the end of the parm list, and more args | |
5987 | are present, and the parm list isn't variadic. */ | |
5988 | if (args && args != void_list_node && parms == void_list_node) | |
5989 | return 1; | |
5990 | /* Fail if parms are left and they don't have default values. */ | |
5991 | if (parms | |
5992 | && parms != void_list_node | |
5993 | && TREE_PURPOSE (parms) == NULL_TREE) | |
5994 | return 1; | |
5995 | if (!subr) | |
5996 | for (i = 0; i < ntparms; i++) | |
050367a3 | 5997 | if (TREE_VEC_ELT (targs, i) == NULL_TREE) |
8d08fdba | 5998 | { |
386b8a85 JM |
5999 | if (!allow_incomplete) |
6000 | error ("incomplete type unification"); | |
8d08fdba MS |
6001 | return 2; |
6002 | } | |
6003 | return 0; | |
6004 | } | |
6005 | ||
db2767b6 MM |
6006 | /* Returns the level of DECL, which declares a template parameter. */ |
6007 | ||
04a81d94 | 6008 | int |
db2767b6 MM |
6009 | template_decl_level (decl) |
6010 | tree decl; | |
6011 | { | |
6012 | switch (TREE_CODE (decl)) | |
6013 | { | |
6014 | case TYPE_DECL: | |
6015 | case TEMPLATE_DECL: | |
6016 | return TEMPLATE_TYPE_LEVEL (TREE_TYPE (decl)); | |
6017 | ||
6018 | case PARM_DECL: | |
6019 | return TEMPLATE_PARM_LEVEL (DECL_INITIAL (decl)); | |
6020 | ||
6021 | default: | |
6022 | my_friendly_abort (0); | |
5ffe581d | 6023 | return 0; |
db2767b6 MM |
6024 | } |
6025 | } | |
6026 | ||
830bfa74 MM |
6027 | /* Decide whether ARG can be unified with PARM, considering only the |
6028 | cv-qualifiers of each type, given STRICT as documented for unify. | |
6029 | Returns non-zero iff the unification is OK on that basis.*/ | |
e92cc029 | 6030 | |
830bfa74 MM |
6031 | int |
6032 | check_cv_quals_for_unify (strict, arg, parm) | |
6033 | int strict; | |
6034 | tree arg; | |
6035 | tree parm; | |
6036 | { | |
6037 | return !((!(strict & UNIFY_ALLOW_MORE_CV_QUAL) | |
6038 | && (TYPE_READONLY (arg) < TYPE_READONLY (parm) | |
6039 | || TYPE_VOLATILE (arg) < TYPE_VOLATILE (parm))) | |
6040 | || (!(strict & UNIFY_ALLOW_LESS_CV_QUAL) | |
6041 | && (TYPE_READONLY (arg) > TYPE_READONLY (parm) | |
6042 | || TYPE_VOLATILE (arg) > TYPE_VOLATILE (parm)))); | |
6043 | } | |
6044 | ||
6045 | /* Takes parameters as for type_unification. Returns 0 if the | |
6046 | type deduction suceeds, 1 otherwise. The parameter STRICT is a | |
6047 | bitwise or of the following flags: | |
6048 | ||
6049 | UNIFY_ALLOW_NONE: | |
6050 | Require an exact match between PARM and ARG. | |
6051 | UNIFY_ALLOW_MORE_CV_QUAL: | |
6052 | Allow the deduced ARG to be more cv-qualified than ARG. | |
6053 | UNIFY_ALLOW_LESS_CV_QUAL: | |
6054 | Allow the deduced ARG to be less cv-qualified than ARG. | |
6055 | UNIFY_ALLOW_DERIVED: | |
6056 | Allow the deduced ARG to be a template base class of ARG, | |
6057 | or a pointer to a template base class of the type pointed to by | |
6058 | ARG. */ | |
6059 | ||
6060 | int | |
6061 | unify (tparms, targs, parm, arg, strict, explicit_mask) | |
050367a3 | 6062 | tree tparms, targs, parm, arg; |
830bfa74 | 6063 | int strict; |
050367a3 | 6064 | int* explicit_mask; |
8d08fdba MS |
6065 | { |
6066 | int idx; | |
050367a3 | 6067 | tree targ; |
db2767b6 | 6068 | tree tparm; |
8d08fdba MS |
6069 | |
6070 | /* I don't think this will do the right thing with respect to types. | |
6071 | But the only case I've seen it in so far has been array bounds, where | |
6072 | signedness is the only information lost, and I think that will be | |
6073 | okay. */ | |
6074 | while (TREE_CODE (parm) == NOP_EXPR) | |
6075 | parm = TREE_OPERAND (parm, 0); | |
6076 | ||
6077 | if (arg == error_mark_node) | |
6078 | return 1; | |
6079 | if (arg == unknown_type_node) | |
6080 | return 1; | |
db2767b6 MM |
6081 | /* If PARM uses template parameters, then we can't bail out here, |
6082 | even in ARG == PARM, since we won't record unifications for the | |
6083 | template parameters. We might need them if we're trying to | |
6084 | figure out which of two things is more specialized. */ | |
6085 | if (arg == parm && !uses_template_parms (parm)) | |
8d08fdba MS |
6086 | return 0; |
6087 | ||
830bfa74 MM |
6088 | /* Immediately reject some pairs that won't unify because of |
6089 | cv-qualification mismatches. */ | |
6090 | if (TREE_CODE (arg) == TREE_CODE (parm) | |
49432171 | 6091 | && TREE_CODE_CLASS (TREE_CODE (arg)) == 't' |
830bfa74 MM |
6092 | /* We check the cv-qualifiers when unifying with template type |
6093 | parameters below. We want to allow ARG `const T' to unify with | |
6094 | PARM `T' for example, when computing which of two templates | |
6095 | is more specialized, for example. */ | |
6096 | && TREE_CODE (arg) != TEMPLATE_TYPE_PARM | |
6097 | && !check_cv_quals_for_unify (strict, arg, parm)) | |
49432171 JM |
6098 | return 1; |
6099 | ||
8d08fdba MS |
6100 | switch (TREE_CODE (parm)) |
6101 | { | |
2ca340ae JM |
6102 | case TYPENAME_TYPE: |
6103 | /* In a type which contains a nested-name-specifier, template | |
6104 | argument values cannot be deduced for template parameters used | |
6105 | within the nested-name-specifier. */ | |
6106 | return 0; | |
6107 | ||
8d08fdba | 6108 | case TEMPLATE_TYPE_PARM: |
73b0fce8 | 6109 | case TEMPLATE_TEMPLATE_PARM: |
db2767b6 MM |
6110 | tparm = TREE_VALUE (TREE_VEC_ELT (tparms, 0)); |
6111 | ||
6112 | if (TEMPLATE_TYPE_LEVEL (parm) | |
6113 | != template_decl_level (tparm)) | |
6114 | /* The PARM is not one we're trying to unify. Just check | |
6115 | to see if it matches ARG. */ | |
6116 | return (TREE_CODE (arg) == TREE_CODE (parm) | |
2e925bfc | 6117 | && comptypes (parm, arg, 1)) ? 0 : 1; |
73b0fce8 | 6118 | idx = TEMPLATE_TYPE_IDX (parm); |
050367a3 | 6119 | targ = TREE_VEC_ELT (targs, idx); |
db2767b6 | 6120 | tparm = TREE_VALUE (TREE_VEC_ELT (tparms, idx)); |
050367a3 | 6121 | |
73b0fce8 | 6122 | /* Check for mixed types and values. */ |
db2767b6 MM |
6123 | if ((TREE_CODE (parm) == TEMPLATE_TYPE_PARM |
6124 | && TREE_CODE (tparm) != TYPE_DECL) | |
6125 | || (TREE_CODE (parm) == TEMPLATE_TEMPLATE_PARM | |
6126 | && TREE_CODE (tparm) != TEMPLATE_DECL)) | |
73b0fce8 KL |
6127 | return 1; |
6128 | ||
050367a3 MM |
6129 | if (!strict && targ != NULL_TREE |
6130 | && explicit_mask && explicit_mask[idx]) | |
73b0fce8 KL |
6131 | /* An explicit template argument. Don't even try to match |
6132 | here; the overload resolution code will manage check to | |
6133 | see whether the call is legal. */ | |
6134 | return 0; | |
6135 | ||
db2767b6 | 6136 | if (TREE_CODE (parm) == TEMPLATE_TEMPLATE_PARM) |
73b0fce8 | 6137 | { |
db2767b6 MM |
6138 | if (CLASSTYPE_TEMPLATE_INFO (parm)) |
6139 | { | |
6140 | /* We arrive here when PARM does not involve template | |
6141 | specialization. */ | |
73b0fce8 | 6142 | |
db2767b6 MM |
6143 | /* ARG must be constructed from a template class. */ |
6144 | if (TREE_CODE (arg) != RECORD_TYPE || !CLASSTYPE_TEMPLATE_INFO (arg)) | |
6145 | return 1; | |
73b0fce8 | 6146 | |
db2767b6 MM |
6147 | { |
6148 | tree parmtmpl = CLASSTYPE_TI_TEMPLATE (parm); | |
6149 | tree parmvec = CLASSTYPE_TI_ARGS (parm); | |
6150 | tree argvec = CLASSTYPE_TI_ARGS (arg); | |
6151 | tree argtmplvec | |
6152 | = DECL_INNERMOST_TEMPLATE_PARMS (CLASSTYPE_TI_TEMPLATE (arg)); | |
6153 | int i; | |
6154 | ||
6155 | /* The parameter and argument roles have to be switched here | |
6156 | in order to handle default arguments properly. For example, | |
6157 | template<template <class> class TT> void f(TT<int>) | |
6158 | should be able to accept vector<int> which comes from | |
6159 | template <class T, class Allcator = allocator> | |
73b0fce8 KL |
6160 | class vector. */ |
6161 | ||
db2767b6 MM |
6162 | if (coerce_template_parms (argtmplvec, parmvec, parmtmpl, 1, 1, 0) |
6163 | == error_mark_node) | |
6164 | return 1; | |
73b0fce8 | 6165 | |
db2767b6 MM |
6166 | /* Deduce arguments T, i from TT<T> or TT<i>. */ |
6167 | for (i = 0; i < TREE_VEC_LENGTH (parmvec); ++i) | |
6168 | { | |
6169 | tree t = TREE_VEC_ELT (parmvec, i); | |
6170 | if (TREE_CODE (t) != TEMPLATE_TYPE_PARM | |
6171 | && TREE_CODE (t) != TEMPLATE_TEMPLATE_PARM | |
6172 | && TREE_CODE (t) != TEMPLATE_PARM_INDEX) | |
6173 | continue; | |
73b0fce8 | 6174 | |
db2767b6 | 6175 | /* This argument can be deduced. */ |
73b0fce8 | 6176 | |
830bfa74 MM |
6177 | if (unify (tparms, targs, t, |
6178 | TREE_VEC_ELT (argvec, i), | |
6179 | UNIFY_ALLOW_NONE, explicit_mask)) | |
db2767b6 MM |
6180 | return 1; |
6181 | } | |
73b0fce8 | 6182 | } |
db2767b6 MM |
6183 | arg = CLASSTYPE_TI_TEMPLATE (arg); |
6184 | } | |
6185 | } | |
6186 | else | |
6187 | { | |
830bfa74 MM |
6188 | /* If PARM is `const T' and ARG is only `int', we don't have |
6189 | a match unless we are allowing additional qualification. | |
6190 | If ARG is `const int' and PARM is just `T' that's OK; | |
6191 | that binds `const int' to `T'. */ | |
6192 | if (!check_cv_quals_for_unify (strict | UNIFY_ALLOW_LESS_CV_QUAL, | |
6193 | arg, parm)) | |
db2767b6 MM |
6194 | return 1; |
6195 | ||
830bfa74 MM |
6196 | /* Consider the case where ARG is `const volatile int' and |
6197 | PARM is `const T'. Then, T should be `volatile int'. */ | |
6198 | arg = | |
6199 | cp_build_type_variant (arg, | |
6200 | TYPE_READONLY (arg) > TYPE_READONLY (parm), | |
6201 | TYPE_VOLATILE (arg) > TYPE_VOLATILE (parm)); | |
73b0fce8 KL |
6202 | } |
6203 | ||
6204 | /* Simple cases: Value already set, does match or doesn't. */ | |
3a56f0ab JM |
6205 | if (targ != NULL_TREE |
6206 | && (comptypes (targ, arg, 1) | |
6207 | || (explicit_mask && explicit_mask[idx]))) | |
73b0fce8 | 6208 | return 0; |
050367a3 | 6209 | else if (targ) |
73b0fce8 | 6210 | return 1; |
050367a3 | 6211 | TREE_VEC_ELT (targs, idx) = arg; |
73b0fce8 KL |
6212 | return 0; |
6213 | ||
f84b4be9 | 6214 | case TEMPLATE_PARM_INDEX: |
db2767b6 MM |
6215 | tparm = TREE_VALUE (TREE_VEC_ELT (tparms, 0)); |
6216 | ||
6217 | if (TEMPLATE_PARM_LEVEL (parm) | |
6218 | != template_decl_level (tparm)) | |
6219 | /* The PARM is not one we're trying to unify. Just check | |
6220 | to see if it matches ARG. */ | |
6221 | return (TREE_CODE (arg) == TREE_CODE (parm) | |
2e925bfc | 6222 | && cp_tree_equal (parm, arg)) ? 0 : 1; |
db2767b6 | 6223 | |
f84b4be9 | 6224 | idx = TEMPLATE_PARM_IDX (parm); |
050367a3 | 6225 | targ = TREE_VEC_ELT (targs, idx); |
db2767b6 | 6226 | |
050367a3 | 6227 | if (targ) |
8d08fdba | 6228 | { |
050367a3 | 6229 | int i = cp_tree_equal (targ, arg); |
312e7d50 JM |
6230 | if (i == 1) |
6231 | return 0; | |
6232 | else if (i == 0) | |
6233 | return 1; | |
6234 | else | |
6235 | my_friendly_abort (42); | |
8d08fdba | 6236 | } |
8d08fdba | 6237 | |
050367a3 | 6238 | TREE_VEC_ELT (targs, idx) = copy_to_permanent (arg); |
8d08fdba MS |
6239 | return 0; |
6240 | ||
6241 | case POINTER_TYPE: | |
830bfa74 MM |
6242 | { |
6243 | int sub_strict; | |
4ac14744 | 6244 | |
830bfa74 MM |
6245 | if (TREE_CODE (arg) == RECORD_TYPE && TYPE_PTRMEMFUNC_FLAG (arg)) |
6246 | return (unify (tparms, targs, parm, | |
6247 | TYPE_PTRMEMFUNC_FN_TYPE (arg), strict, | |
6248 | explicit_mask)); | |
6249 | ||
6250 | if (TREE_CODE (arg) != POINTER_TYPE) | |
6251 | return 1; | |
6252 | ||
6253 | /* [temp.deduct.call] | |
6254 | ||
6255 | A can be another pointer or pointer to member type that can | |
6256 | be converted to the deduced A via a qualification | |
6257 | conversion (_conv.qual_). | |
6258 | ||
6259 | We pass down STRICT here rather than UNIFY_ALLOW_NONE. | |
6260 | This will allow for additional cv-qualification of the | |
6261 | pointed-to types if appropriate. In general, this is a bit | |
6262 | too generous; we are only supposed to allow qualification | |
6263 | conversions and this method will allow an ARG of char** and | |
6264 | a deduced ARG of const char**. However, overload | |
6265 | resolution will subsequently invalidate the candidate, so | |
6266 | this is probably OK. */ | |
6267 | sub_strict = strict; | |
6268 | ||
6269 | if (TREE_CODE (TREE_TYPE (arg)) != RECORD_TYPE | |
6270 | || TYPE_PTRMEMFUNC_FLAG (TREE_TYPE (arg))) | |
6271 | /* The derived-to-base conversion only persists through one | |
6272 | level of pointers. */ | |
6273 | sub_strict &= ~UNIFY_ALLOW_DERIVED; | |
6274 | ||
6275 | return unify (tparms, targs, TREE_TYPE (parm), TREE_TYPE | |
6276 | (arg), sub_strict, explicit_mask); | |
6277 | } | |
8d08fdba MS |
6278 | |
6279 | case REFERENCE_TYPE: | |
830bfa74 MM |
6280 | if (TREE_CODE (arg) != REFERENCE_TYPE) |
6281 | return 1; | |
6282 | return unify (tparms, targs, TREE_TYPE (parm), TREE_TYPE (arg), | |
6283 | UNIFY_ALLOW_NONE, explicit_mask); | |
8d08fdba MS |
6284 | |
6285 | case ARRAY_TYPE: | |
6286 | if (TREE_CODE (arg) != ARRAY_TYPE) | |
6287 | return 1; | |
3042d5be MM |
6288 | if ((TYPE_DOMAIN (parm) == NULL_TREE) |
6289 | != (TYPE_DOMAIN (arg) == NULL_TREE)) | |
6290 | return 1; | |
6291 | if (TYPE_DOMAIN (parm) != NULL_TREE | |
830bfa74 MM |
6292 | && unify (tparms, targs, TYPE_DOMAIN (parm), |
6293 | TYPE_DOMAIN (arg), UNIFY_ALLOW_NONE, explicit_mask) != 0) | |
8d08fdba | 6294 | return 1; |
830bfa74 MM |
6295 | return unify (tparms, targs, TREE_TYPE (parm), TREE_TYPE (arg), |
6296 | UNIFY_ALLOW_NONE, explicit_mask); | |
8d08fdba MS |
6297 | |
6298 | case REAL_TYPE: | |
37c46b43 | 6299 | case COMPLEX_TYPE: |
8d08fdba | 6300 | case INTEGER_TYPE: |
42976354 | 6301 | case BOOLEAN_TYPE: |
5ad5a526 | 6302 | case VOID_TYPE: |
f376e137 MS |
6303 | if (TREE_CODE (arg) != TREE_CODE (parm)) |
6304 | return 1; | |
6305 | ||
6306 | if (TREE_CODE (parm) == INTEGER_TYPE) | |
8d08fdba MS |
6307 | { |
6308 | if (TYPE_MIN_VALUE (parm) && TYPE_MIN_VALUE (arg) | |
830bfa74 MM |
6309 | && unify (tparms, targs, TYPE_MIN_VALUE (parm), |
6310 | TYPE_MIN_VALUE (arg), UNIFY_ALLOW_NONE, explicit_mask)) | |
8d08fdba MS |
6311 | return 1; |
6312 | if (TYPE_MAX_VALUE (parm) && TYPE_MAX_VALUE (arg) | |
830bfa74 MM |
6313 | && unify (tparms, targs, TYPE_MAX_VALUE (parm), |
6314 | TYPE_MAX_VALUE (arg), UNIFY_ALLOW_NONE, explicit_mask)) | |
8d08fdba MS |
6315 | return 1; |
6316 | } | |
ca79f85d | 6317 | else if (TREE_CODE (parm) == REAL_TYPE |
830bfa74 MM |
6318 | /* We use the TYPE_MAIN_VARIANT since we have already |
6319 | checked cv-qualification at the top of the | |
6320 | function. */ | |
6321 | && !comptypes (TYPE_MAIN_VARIANT (arg), | |
6322 | TYPE_MAIN_VARIANT (parm), 1)) | |
ca79f85d JM |
6323 | return 1; |
6324 | ||
8d08fdba MS |
6325 | /* As far as unification is concerned, this wins. Later checks |
6326 | will invalidate it if necessary. */ | |
6327 | return 0; | |
6328 | ||
6329 | /* Types INTEGER_CST and MINUS_EXPR can come from array bounds. */ | |
bd6dd845 | 6330 | /* Type INTEGER_CST can come from ordinary constant template args. */ |
8d08fdba | 6331 | case INTEGER_CST: |
bd6dd845 MS |
6332 | while (TREE_CODE (arg) == NOP_EXPR) |
6333 | arg = TREE_OPERAND (arg, 0); | |
6334 | ||
8d08fdba MS |
6335 | if (TREE_CODE (arg) != INTEGER_CST) |
6336 | return 1; | |
6337 | return !tree_int_cst_equal (parm, arg); | |
6338 | ||
8d08fdba MS |
6339 | case TREE_VEC: |
6340 | { | |
6341 | int i; | |
6342 | if (TREE_CODE (arg) != TREE_VEC) | |
6343 | return 1; | |
6344 | if (TREE_VEC_LENGTH (parm) != TREE_VEC_LENGTH (arg)) | |
6345 | return 1; | |
6346 | for (i = TREE_VEC_LENGTH (parm) - 1; i >= 0; i--) | |
830bfa74 | 6347 | if (unify (tparms, targs, |
8d08fdba | 6348 | TREE_VEC_ELT (parm, i), TREE_VEC_ELT (arg, i), |
830bfa74 | 6349 | UNIFY_ALLOW_NONE, explicit_mask)) |
8d08fdba MS |
6350 | return 1; |
6351 | return 0; | |
6352 | } | |
6353 | ||
8d08fdba | 6354 | case RECORD_TYPE: |
db5ae43f | 6355 | if (TYPE_PTRMEMFUNC_FLAG (parm)) |
830bfa74 | 6356 | return unify (tparms, targs, TYPE_PTRMEMFUNC_FN_TYPE (parm), |
050367a3 | 6357 | arg, strict, explicit_mask); |
8d08fdba | 6358 | |
830bfa74 | 6359 | if (TREE_CODE (arg) != RECORD_TYPE) |
a4443a08 | 6360 | return 1; |
830bfa74 | 6361 | |
6467930b | 6362 | if (CLASSTYPE_TEMPLATE_INFO (parm) && uses_template_parms (parm)) |
5566b478 | 6363 | { |
6467930b | 6364 | tree t = NULL_TREE; |
830bfa74 MM |
6365 | if (strict & UNIFY_ALLOW_DERIVED) |
6366 | /* [temp.deduct.call] | |
6367 | ||
6368 | If P is a class, and P has the form template-id, then A | |
6369 | can be a derived class of the deduced A. Likewise, if | |
6370 | P is a pointer to a class of the form template-id, A | |
6371 | can be a pointer to a derived class pointed to by the | |
6372 | deduced A. */ | |
6467930b | 6373 | t = get_template_base (CLASSTYPE_TI_TEMPLATE (parm), arg); |
c73964b2 MS |
6374 | else if |
6375 | (CLASSTYPE_TEMPLATE_INFO (arg) | |
6376 | && CLASSTYPE_TI_TEMPLATE (parm) == CLASSTYPE_TI_TEMPLATE (arg)) | |
6467930b MS |
6377 | t = arg; |
6378 | if (! t || t == error_mark_node) | |
5566b478 | 6379 | return 1; |
6467930b | 6380 | |
830bfa74 MM |
6381 | return unify (tparms, targs, CLASSTYPE_TI_ARGS (parm), |
6382 | CLASSTYPE_TI_ARGS (t), UNIFY_ALLOW_NONE, | |
6383 | explicit_mask); | |
5566b478 | 6384 | } |
830bfa74 MM |
6385 | else if (!comptypes (TYPE_MAIN_VARIANT (parm), |
6386 | TYPE_MAIN_VARIANT (arg), 1)) | |
5566b478 | 6387 | return 1; |
a4443a08 | 6388 | return 0; |
8d08fdba MS |
6389 | |
6390 | case METHOD_TYPE: | |
8d08fdba | 6391 | case FUNCTION_TYPE: |
830bfa74 | 6392 | if (TREE_CODE (arg) != TREE_CODE (parm)) |
8d08fdba | 6393 | return 1; |
830bfa74 MM |
6394 | |
6395 | if (unify (tparms, targs, TREE_TYPE (parm), | |
6396 | TREE_TYPE (arg), UNIFY_ALLOW_NONE, explicit_mask)) | |
28cbf42c | 6397 | return 1; |
386b8a85 | 6398 | return type_unification_real (tparms, targs, TYPE_ARG_TYPES (parm), |
3b3ba9f0 | 6399 | TYPE_ARG_TYPES (arg), 1, |
830bfa74 | 6400 | DEDUCE_EXACT, 0, explicit_mask); |
a4443a08 MS |
6401 | |
6402 | case OFFSET_TYPE: | |
6403 | if (TREE_CODE (arg) != OFFSET_TYPE) | |
6404 | return 1; | |
830bfa74 MM |
6405 | if (unify (tparms, targs, TYPE_OFFSET_BASETYPE (parm), |
6406 | TYPE_OFFSET_BASETYPE (arg), UNIFY_ALLOW_NONE, explicit_mask)) | |
a4443a08 | 6407 | return 1; |
830bfa74 MM |
6408 | return unify (tparms, targs, TREE_TYPE (parm), TREE_TYPE (arg), |
6409 | UNIFY_ALLOW_NONE, explicit_mask); | |
a4443a08 | 6410 | |
f62dbf03 | 6411 | case CONST_DECL: |
830bfa74 | 6412 | if (arg != decl_constant_value (parm)) |
f62dbf03 JM |
6413 | return 1; |
6414 | return 0; | |
6415 | ||
027905b4 KL |
6416 | case TEMPLATE_DECL: |
6417 | /* Matched cases are handled by the ARG == PARM test above. */ | |
6418 | return 1; | |
6419 | ||
8d08fdba | 6420 | default: |
050367a3 MM |
6421 | if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (TREE_CODE (parm)))) |
6422 | { | |
6423 | /* We're looking at an expression. This can happen with | |
6424 | something like: | |
6425 | ||
6426 | template <int I> | |
6427 | void foo(S<I>, S<I + 2>); | |
6428 | ||
6429 | If the call looked like: | |
6430 | ||
6431 | foo(S<2>(), S<4>()); | |
6432 | ||
6433 | we would have already matched `I' with `2'. Now, we'd | |
6434 | like to know if `4' matches `I + 2'. So, we substitute | |
6435 | into that expression, and fold constants, in the hope of | |
6436 | figuring it out. */ | |
6437 | tree t = | |
6438 | maybe_fold_nontype_arg (tsubst_expr (parm, targs, NULL_TREE)); | |
6439 | enum tree_code tc = TREE_CODE (t); | |
6440 | ||
6441 | if (tc == MINUS_EXPR | |
6442 | && TREE_CODE (TREE_OPERAND (t, 0)) == TEMPLATE_PARM_INDEX | |
6443 | && TREE_CODE (TREE_OPERAND (t, 1)) == INTEGER_CST) | |
6444 | { | |
6445 | /* We handle this case specially, since it comes up with | |
6446 | arrays. In particular, something like: | |
6447 | ||
6448 | template <int N> void f(int (&x)[N]); | |
6449 | ||
6450 | Here, we are trying to unify the range type, which | |
6451 | looks like [0 ... (N - 1)]. */ | |
6452 | tree t1, t2; | |
6453 | t1 = TREE_OPERAND (parm, 0); | |
6454 | t2 = TREE_OPERAND (parm, 1); | |
6455 | ||
6456 | t = maybe_fold_nontype_arg (build (PLUS_EXPR, | |
6457 | integer_type_node, | |
6458 | arg, t2)); | |
6459 | ||
830bfa74 MM |
6460 | return unify (tparms, targs, t1, t, UNIFY_ALLOW_NONE, |
6461 | explicit_mask); | |
050367a3 MM |
6462 | } |
6463 | ||
6464 | if (!IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (tc))) | |
6465 | /* Good, we mangaged to simplify the exression. */ | |
830bfa74 | 6466 | return unify (tparms, targs, t, arg, UNIFY_ALLOW_NONE, |
050367a3 MM |
6467 | explicit_mask); |
6468 | else | |
6469 | /* Bad, we couldn't simplify this. Assume it doesn't | |
6470 | unify. */ | |
6471 | return 1; | |
6472 | } | |
6473 | else | |
b4c4a9ec MM |
6474 | sorry ("use of `%s' in template type unification", |
6475 | tree_code_name [(int) TREE_CODE (parm)]); | |
050367a3 | 6476 | |
8d08fdba MS |
6477 | return 1; |
6478 | } | |
6479 | } | |
8d08fdba | 6480 | \f |
faae18ab | 6481 | void |
5566b478 | 6482 | mark_decl_instantiated (result, extern_p) |
faae18ab MS |
6483 | tree result; |
6484 | int extern_p; | |
6485 | { | |
6486 | if (DECL_TEMPLATE_INSTANTIATION (result)) | |
6487 | SET_DECL_EXPLICIT_INSTANTIATION (result); | |
75650646 MM |
6488 | |
6489 | if (TREE_CODE (result) != FUNCTION_DECL) | |
6490 | /* The TREE_PUBLIC flag for function declarations will have been | |
6491 | set correctly by tsubst. */ | |
6492 | TREE_PUBLIC (result) = 1; | |
faae18ab MS |
6493 | |
6494 | if (! extern_p) | |
6495 | { | |
6496 | DECL_INTERFACE_KNOWN (result) = 1; | |
6497 | DECL_NOT_REALLY_EXTERN (result) = 1; | |
a7d87521 JM |
6498 | |
6499 | /* For WIN32 we also want to put explicit instantiations in | |
6500 | linkonce sections. */ | |
b385c841 JM |
6501 | if (TREE_PUBLIC (result)) |
6502 | maybe_make_one_only (result); | |
faae18ab | 6503 | } |
f49422da MS |
6504 | else if (TREE_CODE (result) == FUNCTION_DECL) |
6505 | mark_inline_for_output (result); | |
faae18ab MS |
6506 | } |
6507 | ||
e1467ff2 MM |
6508 | /* Given two function templates PAT1 and PAT2, and explicit template |
6509 | arguments EXPLICIT_ARGS return: | |
6467930b MS |
6510 | |
6511 | 1 if PAT1 is more specialized than PAT2 as described in [temp.func.order]. | |
6512 | -1 if PAT2 is more specialized than PAT1. | |
6513 | 0 if neither is more specialized. */ | |
6514 | ||
6515 | int | |
e1467ff2 MM |
6516 | more_specialized (pat1, pat2, explicit_args) |
6517 | tree pat1, pat2, explicit_args; | |
6467930b | 6518 | { |
98c1c668 | 6519 | tree targs; |
73aad9b9 | 6520 | int winner = 0; |
6467930b | 6521 | |
76b9a14d | 6522 | targs = get_bindings_overload (pat1, pat2, explicit_args); |
73aad9b9 JM |
6523 | if (targs) |
6524 | { | |
73aad9b9 JM |
6525 | --winner; |
6526 | } | |
6467930b | 6527 | |
76b9a14d | 6528 | targs = get_bindings_overload (pat2, pat1, explicit_args); |
73aad9b9 JM |
6529 | if (targs) |
6530 | { | |
73aad9b9 JM |
6531 | ++winner; |
6532 | } | |
6467930b | 6533 | |
73aad9b9 JM |
6534 | return winner; |
6535 | } | |
6467930b | 6536 | |
73aad9b9 | 6537 | /* Given two class template specialization list nodes PAT1 and PAT2, return: |
6467930b | 6538 | |
73aad9b9 JM |
6539 | 1 if PAT1 is more specialized than PAT2 as described in [temp.class.order]. |
6540 | -1 if PAT2 is more specialized than PAT1. | |
6541 | 0 if neither is more specialized. */ | |
6542 | ||
6543 | int | |
6544 | more_specialized_class (pat1, pat2) | |
6545 | tree pat1, pat2; | |
6546 | { | |
6547 | tree targs; | |
6548 | int winner = 0; | |
6549 | ||
6550 | targs = get_class_bindings | |
8d019cef JM |
6551 | (TREE_VALUE (pat1), TREE_PURPOSE (pat1), |
6552 | TREE_PURPOSE (pat2), NULL_TREE); | |
73aad9b9 JM |
6553 | if (targs) |
6554 | --winner; | |
6555 | ||
6556 | targs = get_class_bindings | |
8d019cef JM |
6557 | (TREE_VALUE (pat2), TREE_PURPOSE (pat2), |
6558 | TREE_PURPOSE (pat1), NULL_TREE); | |
73aad9b9 | 6559 | if (targs) |
6467930b MS |
6560 | ++winner; |
6561 | ||
6562 | return winner; | |
6563 | } | |
73aad9b9 JM |
6564 | |
6565 | /* Return the template arguments that will produce the function signature | |
e1467ff2 | 6566 | DECL from the function template FN, with the explicit template |
76b9a14d JM |
6567 | arguments EXPLICIT_ARGS. If CHECK_RETTYPE is 1, the return type must |
6568 | also match. */ | |
73aad9b9 | 6569 | |
76b9a14d JM |
6570 | static tree |
6571 | get_bindings_real (fn, decl, explicit_args, check_rettype) | |
e1467ff2 | 6572 | tree fn, decl, explicit_args; |
76b9a14d | 6573 | int check_rettype; |
73aad9b9 | 6574 | { |
98c1c668 | 6575 | int ntparms = DECL_NTPARMS (fn); |
e66d884e | 6576 | tree targs = make_scratch_vec (ntparms); |
d7684f2d MM |
6577 | tree decl_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl)); |
6578 | tree extra_fn_arg = NULL_TREE; | |
98c1c668 JM |
6579 | int i; |
6580 | ||
d7684f2d MM |
6581 | if (DECL_STATIC_FUNCTION_P (fn) |
6582 | && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)) | |
6583 | { | |
6584 | /* Sometimes we are trying to figure out what's being | |
6585 | specialized by a declaration that looks like a method, and it | |
6586 | turns out to be a static member function. */ | |
6587 | if (CLASSTYPE_TEMPLATE_INFO (DECL_REAL_CONTEXT (fn)) | |
6588 | && !is_member_template (fn)) | |
6589 | /* The natural thing to do here seems to be to remove the | |
6590 | spurious `this' parameter from the DECL, but that prevents | |
6591 | unification from making use of the class type. So, | |
6592 | instead, we have fn_type_unification add to the parameters | |
6593 | for FN. */ | |
6594 | extra_fn_arg = build_pointer_type (DECL_REAL_CONTEXT (fn)); | |
6595 | else | |
6596 | /* In this case, though, adding the extra_fn_arg can confuse | |
6597 | things, so we remove from decl_arg_types instead. */ | |
6598 | decl_arg_types = TREE_CHAIN (decl_arg_types); | |
6599 | } | |
6600 | ||
e1467ff2 | 6601 | i = fn_type_unification (fn, explicit_args, targs, |
d7684f2d | 6602 | decl_arg_types, |
98c1c668 | 6603 | TREE_TYPE (TREE_TYPE (decl)), |
830bfa74 | 6604 | DEDUCE_EXACT, |
d7684f2d | 6605 | extra_fn_arg); |
98c1c668 | 6606 | |
76b9a14d JM |
6607 | if (i != 0) |
6608 | return NULL_TREE; | |
6609 | ||
6610 | if (check_rettype) | |
e1467ff2 MM |
6611 | { |
6612 | /* Check to see that the resulting return type is also OK. */ | |
e6f1275f JM |
6613 | tree t = tsubst (TREE_TYPE (TREE_TYPE (fn)), |
6614 | complete_template_args (fn, targs, 1), | |
6615 | NULL_TREE); | |
e1467ff2 | 6616 | |
f84b4be9 | 6617 | if (!comptypes (t, TREE_TYPE (TREE_TYPE (decl)), 1)) |
e1467ff2 | 6618 | return NULL_TREE; |
e1467ff2 MM |
6619 | } |
6620 | ||
76b9a14d JM |
6621 | return targs; |
6622 | } | |
6623 | ||
6624 | /* For most uses, we want to check the return type. */ | |
6625 | ||
6626 | tree | |
6627 | get_bindings (fn, decl, explicit_args) | |
6628 | tree fn, decl, explicit_args; | |
6629 | { | |
6630 | return get_bindings_real (fn, decl, explicit_args, 1); | |
6631 | } | |
6632 | ||
6633 | /* But for more_specialized, we only care about the parameter types. */ | |
6634 | ||
6635 | static tree | |
6636 | get_bindings_overload (fn, decl, explicit_args) | |
6637 | tree fn, decl, explicit_args; | |
6638 | { | |
6639 | return get_bindings_real (fn, decl, explicit_args, 0); | |
73aad9b9 JM |
6640 | } |
6641 | ||
bd6dd845 | 6642 | static tree |
8d019cef JM |
6643 | get_class_bindings (tparms, parms, args, outer_args) |
6644 | tree tparms, parms, args, outer_args; | |
73aad9b9 | 6645 | { |
3b3ba9f0 | 6646 | int i, ntparms = TREE_VEC_LENGTH (tparms); |
73aad9b9 JM |
6647 | tree vec = make_temp_vec (ntparms); |
6648 | ||
8d019cef JM |
6649 | if (outer_args) |
6650 | { | |
6651 | tparms = tsubst (tparms, outer_args, NULL_TREE); | |
6652 | parms = tsubst (parms, outer_args, NULL_TREE); | |
6653 | } | |
6654 | ||
73aad9b9 JM |
6655 | for (i = 0; i < TREE_VEC_LENGTH (parms); ++i) |
6656 | { | |
830bfa74 | 6657 | switch (unify (tparms, vec, |
050367a3 | 6658 | TREE_VEC_ELT (parms, i), TREE_VEC_ELT (args, i), |
830bfa74 | 6659 | UNIFY_ALLOW_NONE, 0)) |
73aad9b9 JM |
6660 | { |
6661 | case 0: | |
6662 | break; | |
6663 | case 1: | |
6664 | return NULL_TREE; | |
6665 | } | |
6666 | } | |
6667 | ||
6668 | for (i = 0; i < ntparms; ++i) | |
6669 | if (! TREE_VEC_ELT (vec, i)) | |
6670 | return NULL_TREE; | |
6671 | ||
6672 | return vec; | |
6673 | } | |
6674 | ||
6675 | /* Return the most specialized of the list of templates in FNS that can | |
e1467ff2 MM |
6676 | produce an instantiation matching DECL, given the explicit template |
6677 | arguments EXPLICIT_ARGS. */ | |
73aad9b9 JM |
6678 | |
6679 | tree | |
e1467ff2 MM |
6680 | most_specialized (fns, decl, explicit_args) |
6681 | tree fns, decl, explicit_args; | |
73aad9b9 | 6682 | { |
98c1c668 | 6683 | tree fn, champ, args, *p; |
73aad9b9 JM |
6684 | int fate; |
6685 | ||
6686 | for (p = &fns; *p; ) | |
6687 | { | |
e1467ff2 | 6688 | args = get_bindings (TREE_VALUE (*p), decl, explicit_args); |
73aad9b9 JM |
6689 | if (args) |
6690 | { | |
73aad9b9 JM |
6691 | p = &TREE_CHAIN (*p); |
6692 | } | |
6693 | else | |
6694 | *p = TREE_CHAIN (*p); | |
6695 | } | |
6696 | ||
6697 | if (! fns) | |
6698 | return NULL_TREE; | |
6699 | ||
6700 | fn = fns; | |
6701 | champ = TREE_VALUE (fn); | |
6702 | fn = TREE_CHAIN (fn); | |
6703 | for (; fn; fn = TREE_CHAIN (fn)) | |
6704 | { | |
e1467ff2 | 6705 | fate = more_specialized (champ, TREE_VALUE (fn), explicit_args); |
73aad9b9 JM |
6706 | if (fate == 1) |
6707 | ; | |
6708 | else | |
6709 | { | |
6710 | if (fate == 0) | |
6711 | { | |
6712 | fn = TREE_CHAIN (fn); | |
6713 | if (! fn) | |
6714 | return error_mark_node; | |
6715 | } | |
6716 | champ = TREE_VALUE (fn); | |
6717 | } | |
6718 | } | |
6719 | ||
6720 | for (fn = fns; fn && TREE_VALUE (fn) != champ; fn = TREE_CHAIN (fn)) | |
6721 | { | |
e1467ff2 | 6722 | fate = more_specialized (champ, TREE_VALUE (fn), explicit_args); |
73aad9b9 JM |
6723 | if (fate != 1) |
6724 | return error_mark_node; | |
6725 | } | |
6726 | ||
6727 | return champ; | |
6728 | } | |
6729 | ||
6730 | /* Return the most specialized of the class template specializations in | |
6731 | SPECS that can produce an instantiation matching ARGS. */ | |
6732 | ||
6733 | tree | |
8d019cef JM |
6734 | most_specialized_class (specs, mainargs, outer_args) |
6735 | tree specs, mainargs, outer_args; | |
73aad9b9 JM |
6736 | { |
6737 | tree list = NULL_TREE, t, args, champ; | |
6738 | int fate; | |
6739 | ||
6740 | for (t = specs; t; t = TREE_CHAIN (t)) | |
6741 | { | |
8d019cef JM |
6742 | args = get_class_bindings (TREE_VALUE (t), TREE_PURPOSE (t), |
6743 | mainargs, outer_args); | |
73aad9b9 JM |
6744 | if (args) |
6745 | { | |
6746 | list = decl_tree_cons (TREE_PURPOSE (t), TREE_VALUE (t), list); | |
6747 | TREE_TYPE (list) = TREE_TYPE (t); | |
6748 | } | |
6749 | } | |
6750 | ||
6751 | if (! list) | |
6752 | return NULL_TREE; | |
6753 | ||
6754 | t = list; | |
6755 | champ = t; | |
6756 | t = TREE_CHAIN (t); | |
6757 | for (; t; t = TREE_CHAIN (t)) | |
6758 | { | |
6759 | fate = more_specialized_class (champ, t); | |
6760 | if (fate == 1) | |
6761 | ; | |
6762 | else | |
6763 | { | |
6764 | if (fate == 0) | |
6765 | { | |
6766 | t = TREE_CHAIN (t); | |
6767 | if (! t) | |
6768 | return error_mark_node; | |
6769 | } | |
6770 | champ = t; | |
6771 | } | |
6772 | } | |
6773 | ||
6774 | for (t = list; t && t != champ; t = TREE_CHAIN (t)) | |
6775 | { | |
85b71cf2 | 6776 | fate = more_specialized_class (champ, t); |
73aad9b9 JM |
6777 | if (fate != 1) |
6778 | return error_mark_node; | |
6779 | } | |
6780 | ||
6781 | return champ; | |
6782 | } | |
6783 | ||
8d08fdba | 6784 | /* called from the parser. */ |
e92cc029 | 6785 | |
8d08fdba | 6786 | void |
6633d636 | 6787 | do_decl_instantiation (declspecs, declarator, storage) |
f0e01782 | 6788 | tree declspecs, declarator, storage; |
8d08fdba | 6789 | { |
c11b6f21 | 6790 | tree decl = grokdeclarator (declarator, declspecs, NORMAL, 0, NULL_TREE); |
8d08fdba | 6791 | tree result = NULL_TREE; |
faae18ab | 6792 | int extern_p = 0; |
e8abc66f | 6793 | |
ec255269 MS |
6794 | if (! DECL_LANG_SPECIFIC (decl)) |
6795 | { | |
6796 | cp_error ("explicit instantiation of non-template `%#D'", decl); | |
6797 | return; | |
6798 | } | |
6799 | ||
e8abc66f | 6800 | /* If we've already seen this template instance, use it. */ |
6633d636 MS |
6801 | if (TREE_CODE (decl) == VAR_DECL) |
6802 | { | |
6803 | result = lookup_field (DECL_CONTEXT (decl), DECL_NAME (decl), 0, 0); | |
6804 | if (result && TREE_CODE (result) != VAR_DECL) | |
6805 | result = NULL_TREE; | |
6806 | } | |
6807 | else if (TREE_CODE (decl) != FUNCTION_DECL) | |
6808 | { | |
6809 | cp_error ("explicit instantiation of `%#D'", decl); | |
6810 | return; | |
6811 | } | |
e1467ff2 MM |
6812 | else if (DECL_TEMPLATE_INSTANTIATION (decl)) |
6813 | result = decl; | |
98c1c668 | 6814 | |
7177d104 | 6815 | if (! result) |
faae18ab MS |
6816 | { |
6817 | cp_error ("no matching template for `%D' found", decl); | |
6818 | return; | |
6819 | } | |
7177d104 | 6820 | |
6633d636 MS |
6821 | if (! DECL_TEMPLATE_INFO (result)) |
6822 | { | |
6823 | cp_pedwarn ("explicit instantiation of non-template `%#D'", result); | |
6824 | return; | |
6825 | } | |
6826 | ||
a0a33927 MS |
6827 | if (flag_external_templates) |
6828 | return; | |
6829 | ||
f0e01782 | 6830 | if (storage == NULL_TREE) |
00595019 | 6831 | ; |
faae18ab MS |
6832 | else if (storage == ridpointers[(int) RID_EXTERN]) |
6833 | extern_p = 1; | |
f0e01782 MS |
6834 | else |
6835 | cp_error ("storage class `%D' applied to template instantiation", | |
6836 | storage); | |
5566b478 | 6837 | |
5566b478 | 6838 | mark_decl_instantiated (result, extern_p); |
44a8d0b3 | 6839 | repo_template_instantiated (result, extern_p); |
c91a56d2 MS |
6840 | if (! extern_p) |
6841 | instantiate_decl (result); | |
7177d104 MS |
6842 | } |
6843 | ||
faae18ab MS |
6844 | void |
6845 | mark_class_instantiated (t, extern_p) | |
6846 | tree t; | |
6847 | int extern_p; | |
6848 | { | |
6849 | SET_CLASSTYPE_EXPLICIT_INSTANTIATION (t); | |
eb773359 JM |
6850 | SET_CLASSTYPE_INTERFACE_KNOWN (t); |
6851 | CLASSTYPE_INTERFACE_ONLY (t) = extern_p; | |
faae18ab MS |
6852 | CLASSTYPE_VTABLE_NEEDS_WRITING (t) = ! extern_p; |
6853 | TYPE_DECL_SUPPRESS_DEBUG (TYPE_NAME (t)) = extern_p; | |
6854 | if (! extern_p) | |
6855 | { | |
6856 | CLASSTYPE_DEBUG_REQUESTED (t) = 1; | |
6857 | rest_of_type_compilation (t, 1); | |
6858 | } | |
6859 | } | |
e8abc66f | 6860 | |
7177d104 | 6861 | void |
ca79f85d JM |
6862 | do_type_instantiation (t, storage) |
6863 | tree t, storage; | |
7177d104 | 6864 | { |
e8abc66f MS |
6865 | int extern_p = 0; |
6866 | int nomem_p = 0; | |
5566b478 MS |
6867 | int static_p = 0; |
6868 | ||
ca79f85d JM |
6869 | if (TREE_CODE (t) == TYPE_DECL) |
6870 | t = TREE_TYPE (t); | |
6871 | ||
6872 | if (! IS_AGGR_TYPE (t) || ! CLASSTYPE_TEMPLATE_INFO (t)) | |
6873 | { | |
6874 | cp_error ("explicit instantiation of non-template type `%T'", t); | |
6875 | return; | |
6876 | } | |
6877 | ||
5566b478 | 6878 | complete_type (t); |
7177d104 | 6879 | |
a292b002 MS |
6880 | /* With -fexternal-templates, explicit instantiations are treated the same |
6881 | as implicit ones. */ | |
a0a33927 MS |
6882 | if (flag_external_templates) |
6883 | return; | |
6884 | ||
f0e01782 MS |
6885 | if (TYPE_SIZE (t) == NULL_TREE) |
6886 | { | |
6887 | cp_error ("explicit instantiation of `%#T' before definition of template", | |
6888 | t); | |
6889 | return; | |
6890 | } | |
6891 | ||
6892 | if (storage == NULL_TREE) | |
e8abc66f MS |
6893 | /* OK */; |
6894 | else if (storage == ridpointers[(int) RID_INLINE]) | |
6895 | nomem_p = 1; | |
f0e01782 MS |
6896 | else if (storage == ridpointers[(int) RID_EXTERN]) |
6897 | extern_p = 1; | |
5566b478 MS |
6898 | else if (storage == ridpointers[(int) RID_STATIC]) |
6899 | static_p = 1; | |
f0e01782 MS |
6900 | else |
6901 | { | |
6902 | cp_error ("storage class `%D' applied to template instantiation", | |
6903 | storage); | |
6904 | extern_p = 0; | |
6905 | } | |
6906 | ||
a292b002 | 6907 | /* We've already instantiated this. */ |
44a8d0b3 MS |
6908 | if (CLASSTYPE_EXPLICIT_INSTANTIATION (t) && ! CLASSTYPE_INTERFACE_ONLY (t) |
6909 | && extern_p) | |
6910 | return; | |
a292b002 | 6911 | |
f376e137 | 6912 | if (! CLASSTYPE_TEMPLATE_SPECIALIZATION (t)) |
44a8d0b3 MS |
6913 | { |
6914 | mark_class_instantiated (t, extern_p); | |
6915 | repo_template_instantiated (t, extern_p); | |
6916 | } | |
e8abc66f MS |
6917 | |
6918 | if (nomem_p) | |
6919 | return; | |
6920 | ||
7177d104 | 6921 | { |
db5ae43f | 6922 | tree tmp; |
5566b478 MS |
6923 | |
6924 | if (! static_p) | |
6925 | for (tmp = TYPE_METHODS (t); tmp; tmp = TREE_CHAIN (tmp)) | |
a7d87521 | 6926 | if (TREE_CODE (tmp) == FUNCTION_DECL |
1f109f0f | 6927 | && DECL_TEMPLATE_INSTANTIATION (tmp)) |
5566b478 MS |
6928 | { |
6929 | mark_decl_instantiated (tmp, extern_p); | |
6930 | repo_template_instantiated (tmp, extern_p); | |
6931 | if (! extern_p) | |
6932 | instantiate_decl (tmp); | |
6933 | } | |
6934 | ||
6935 | for (tmp = TYPE_FIELDS (t); tmp; tmp = TREE_CHAIN (tmp)) | |
6936 | if (TREE_CODE (tmp) == VAR_DECL && DECL_TEMPLATE_INSTANTIATION (tmp)) | |
863adfc0 | 6937 | { |
5566b478 | 6938 | mark_decl_instantiated (tmp, extern_p); |
863adfc0 | 6939 | repo_template_instantiated (tmp, extern_p); |
5566b478 MS |
6940 | if (! extern_p) |
6941 | instantiate_decl (tmp); | |
863adfc0 | 6942 | } |
7177d104 | 6943 | |
a292b002 | 6944 | for (tmp = CLASSTYPE_TAGS (t); tmp; tmp = TREE_CHAIN (tmp)) |
f376e137 MS |
6945 | if (IS_AGGR_TYPE (TREE_VALUE (tmp))) |
6946 | do_type_instantiation (TYPE_MAIN_DECL (TREE_VALUE (tmp)), storage); | |
a292b002 | 6947 | } |
8d08fdba | 6948 | } |
a28e3c7f | 6949 | |
830bfa74 MM |
6950 | /* Given a function DECL, which is a specialization of TEMP, modify |
6951 | DECL to be a re-instantiation of TEMPL with the same template | |
6952 | arguments. | |
6953 | ||
6954 | One reason for doing this is a scenario like this: | |
6955 | ||
6956 | template <class T> | |
6957 | void f(const T&, int i); | |
6958 | ||
6959 | void g() { f(3, 7); } | |
6960 | ||
6961 | template <class T> | |
6962 | void f(const T& t, const int i) { } | |
6963 | ||
6964 | Note that when the template is first instantiated, with | |
6965 | instantiate_template, the resulting DECL will have no name for the | |
6966 | first parameter, and the wrong type for the second. So, when we go | |
6967 | to instantiate the DECL, we regenerate it. */ | |
6968 | ||
6969 | void | |
6970 | regenerate_decl_from_template (decl, tmpl) | |
6971 | tree decl; | |
6972 | tree tmpl; | |
6973 | { | |
6974 | tree args; | |
6975 | tree save_ti; | |
6976 | tree code_pattern; | |
6977 | tree new_decl; | |
6978 | ||
6979 | args = DECL_TI_ARGS (decl); | |
6980 | code_pattern = DECL_TEMPLATE_RESULT (tmpl); | |
6981 | ||
6982 | /* Trick tsubst into giving us a new decl. CODE_PATTERN must be the | |
6983 | most distant ancestor of DECL, since that's the one that will | |
6984 | actually be altered by a redefinition. */ | |
6985 | save_ti = DECL_TEMPLATE_INFO (code_pattern); | |
6986 | DECL_TEMPLATE_INFO (code_pattern) = NULL_TREE; | |
6987 | new_decl = tsubst (code_pattern, args, NULL_TREE); | |
6988 | SET_DECL_IMPLICIT_INSTANTIATION (new_decl); | |
6989 | DECL_TEMPLATE_INFO (code_pattern) = save_ti; | |
6990 | ||
6991 | if (TREE_CODE (decl) == VAR_DECL) | |
6992 | { | |
6993 | /* Set up DECL_INITIAL, since tsubst doesn't. */ | |
6994 | pushclass (DECL_CONTEXT (decl), 2); | |
6995 | DECL_INITIAL (new_decl) = | |
6996 | tsubst_expr (DECL_INITIAL (code_pattern), args, | |
6997 | DECL_TI_TEMPLATE (decl)); | |
6998 | popclass (1); | |
6999 | } | |
7000 | ||
7001 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
7002 | { | |
7003 | /* Convince duplicate_decls to use the DECL_ARGUMENTS from the | |
7004 | new decl. */ | |
7005 | DECL_INITIAL (new_decl) = error_mark_node; | |
7006 | ||
7007 | if (DECL_TEMPLATE_SPECIALIZATION (new_decl) | |
7008 | && !DECL_TEMPLATE_INFO (new_decl)) | |
7009 | /* Set up the information about what is being specialized. */ | |
7010 | DECL_TEMPLATE_INFO (new_decl) = DECL_TEMPLATE_INFO (decl); | |
7011 | } | |
7012 | ||
7013 | duplicate_decls (new_decl, decl); | |
7014 | ||
7015 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
7016 | DECL_INITIAL (new_decl) = NULL_TREE; | |
7017 | } | |
7018 | ||
f84b4be9 JM |
7019 | /* Produce the definition of D, a _DECL generated from a template. */ |
7020 | ||
a28e3c7f | 7021 | tree |
5566b478 MS |
7022 | instantiate_decl (d) |
7023 | tree d; | |
a28e3c7f | 7024 | { |
5566b478 MS |
7025 | tree ti = DECL_TEMPLATE_INFO (d); |
7026 | tree tmpl = TI_TEMPLATE (ti); | |
7027 | tree args = TI_ARGS (ti); | |
830bfa74 | 7028 | tree td; |
fee23f54 | 7029 | tree decl_pattern, code_pattern; |
5566b478 MS |
7030 | int nested = in_function_p (); |
7031 | int d_defined; | |
7032 | int pattern_defined; | |
5156628f MS |
7033 | int line = lineno; |
7034 | char *file = input_filename; | |
5566b478 | 7035 | |
f84b4be9 JM |
7036 | for (td = tmpl; |
7037 | DECL_TEMPLATE_INSTANTIATION (td) | |
7038 | /* This next clause handles friend templates defined inside | |
7039 | class templates. The friend templates are not really | |
7040 | instantiations from the point of view of the language, but | |
7041 | they are instantiations from the point of view of the | |
7042 | compiler. */ | |
7043 | || (DECL_TEMPLATE_INFO (td) && !DECL_TEMPLATE_SPECIALIZATION (td)); | |
7044 | ) | |
fee23f54 | 7045 | td = DECL_TI_TEMPLATE (td); |
27bb8339 | 7046 | |
fee23f54 JM |
7047 | /* In the case of a member template, decl_pattern is the partially |
7048 | instantiated declaration (in the instantiated class), and code_pattern | |
7049 | is the original template definition. */ | |
7050 | decl_pattern = DECL_TEMPLATE_RESULT (tmpl); | |
7051 | code_pattern = DECL_TEMPLATE_RESULT (td); | |
27bb8339 | 7052 | |
5566b478 MS |
7053 | if (TREE_CODE (d) == FUNCTION_DECL) |
7054 | { | |
7055 | d_defined = (DECL_INITIAL (d) != NULL_TREE); | |
fee23f54 | 7056 | pattern_defined = (DECL_INITIAL (code_pattern) != NULL_TREE); |
5566b478 MS |
7057 | } |
7058 | else | |
7059 | { | |
7060 | d_defined = ! DECL_IN_AGGR_P (d); | |
fee23f54 | 7061 | pattern_defined = ! DECL_IN_AGGR_P (code_pattern); |
5566b478 MS |
7062 | } |
7063 | ||
7064 | if (d_defined) | |
7065 | return d; | |
de22184b | 7066 | |
7ac63bca JM |
7067 | if (TREE_CODE (d) == FUNCTION_DECL) |
7068 | { | |
75650646 MM |
7069 | tree spec = retrieve_specialization (tmpl, args); |
7070 | ||
7071 | if (spec != NULL_TREE | |
7072 | && DECL_TEMPLATE_SPECIALIZATION (spec)) | |
7073 | return spec; | |
7ac63bca JM |
7074 | } |
7075 | ||
de22184b MS |
7076 | /* This needs to happen before any tsubsting. */ |
7077 | if (! push_tinst_level (d)) | |
7078 | return d; | |
7079 | ||
7080 | push_to_top_level (); | |
7081 | lineno = DECL_SOURCE_LINE (d); | |
7082 | input_filename = DECL_SOURCE_FILE (d); | |
7083 | ||
7084 | /* We need to set up DECL_INITIAL regardless of pattern_defined if the | |
7085 | variable is a static const initialized in the class body. */ | |
7086 | if (TREE_CODE (d) == VAR_DECL | |
fee23f54 | 7087 | && ! DECL_INITIAL (d) && DECL_INITIAL (code_pattern)) |
de22184b MS |
7088 | { |
7089 | pushclass (DECL_CONTEXT (d), 2); | |
fee23f54 | 7090 | DECL_INITIAL (d) = tsubst_expr (DECL_INITIAL (code_pattern), args, |
f7d98d58 | 7091 | tmpl); |
bd0f14dc | 7092 | cp_finish_decl (d, DECL_INITIAL (d), NULL_TREE, 0, LOOKUP_NORMAL); |
de22184b MS |
7093 | } |
7094 | ||
de22184b | 7095 | if (pattern_defined) |
5566b478 MS |
7096 | { |
7097 | repo_template_used (d); | |
7098 | ||
7099 | if (flag_external_templates && ! DECL_INTERFACE_KNOWN (d)) | |
7100 | { | |
7101 | if (flag_alt_external_templates) | |
7102 | { | |
7103 | if (interface_unknown) | |
7104 | warn_if_unknown_interface (d); | |
7105 | } | |
fee23f54 | 7106 | else if (DECL_INTERFACE_KNOWN (code_pattern)) |
5566b478 MS |
7107 | { |
7108 | DECL_INTERFACE_KNOWN (d) = 1; | |
fee23f54 | 7109 | DECL_NOT_REALLY_EXTERN (d) = ! DECL_EXTERNAL (code_pattern); |
5566b478 MS |
7110 | } |
7111 | else | |
fee23f54 | 7112 | warn_if_unknown_interface (code_pattern); |
5566b478 MS |
7113 | } |
7114 | ||
e92cc029 | 7115 | if (at_eof) |
5566b478 MS |
7116 | import_export_decl (d); |
7117 | } | |
7118 | ||
c4ae3f91 JM |
7119 | /* Reject all external templates except inline functions. */ |
7120 | if (DECL_INTERFACE_KNOWN (d) | |
7121 | && ! DECL_NOT_REALLY_EXTERN (d) | |
7122 | && ! (TREE_CODE (d) == FUNCTION_DECL && DECL_INLINE (d))) | |
7123 | goto out; | |
7124 | ||
7125 | /* Defer all templates except inline functions used in another function. */ | |
5566b478 | 7126 | if (! pattern_defined |
c4ae3f91 JM |
7127 | || (! (TREE_CODE (d) == FUNCTION_DECL && DECL_INLINE (d) && nested) |
7128 | && ! at_eof)) | |
5566b478 MS |
7129 | { |
7130 | add_pending_template (d); | |
de22184b | 7131 | goto out; |
5566b478 MS |
7132 | } |
7133 | ||
5156628f MS |
7134 | lineno = DECL_SOURCE_LINE (d); |
7135 | input_filename = DECL_SOURCE_FILE (d); | |
7136 | ||
830bfa74 | 7137 | regenerate_decl_from_template (d, td); |
5566b478 MS |
7138 | |
7139 | if (TREE_CODE (d) == VAR_DECL) | |
7140 | { | |
7141 | DECL_IN_AGGR_P (d) = 0; | |
7142 | if (DECL_INTERFACE_KNOWN (d)) | |
7143 | DECL_EXTERNAL (d) = ! DECL_NOT_REALLY_EXTERN (d); | |
7144 | else | |
7145 | { | |
7146 | DECL_EXTERNAL (d) = 1; | |
7147 | DECL_NOT_REALLY_EXTERN (d) = 1; | |
7148 | } | |
7149 | cp_finish_decl (d, DECL_INITIAL (d), NULL_TREE, 0, 0); | |
7150 | } | |
7151 | else if (TREE_CODE (d) == FUNCTION_DECL) | |
7152 | { | |
fee23f54 | 7153 | tree t = DECL_SAVED_TREE (code_pattern); |
5566b478 | 7154 | |
c11b6f21 | 7155 | start_function (NULL_TREE, d, NULL_TREE, 1); |
5566b478 MS |
7156 | store_parm_decls (); |
7157 | ||
e76a2646 MS |
7158 | if (t && TREE_CODE (t) == RETURN_INIT) |
7159 | { | |
7160 | store_return_init | |
7161 | (TREE_OPERAND (t, 0), | |
f7d98d58 | 7162 | tsubst_expr (TREE_OPERAND (t, 1), args, tmpl)); |
e76a2646 MS |
7163 | t = TREE_CHAIN (t); |
7164 | } | |
7165 | ||
5566b478 MS |
7166 | if (t && TREE_CODE (t) == CTOR_INITIALIZER) |
7167 | { | |
7168 | current_member_init_list | |
7169 | = tsubst_expr_values (TREE_OPERAND (t, 0), args); | |
7170 | current_base_init_list | |
7171 | = tsubst_expr_values (TREE_OPERAND (t, 1), args); | |
7172 | t = TREE_CHAIN (t); | |
7173 | } | |
7174 | ||
7175 | setup_vtbl_ptr (); | |
7176 | /* Always keep the BLOCK node associated with the outermost | |
956d6950 | 7177 | pair of curly braces of a function. These are needed |
5566b478 MS |
7178 | for correct operation of dwarfout.c. */ |
7179 | keep_next_level (); | |
7180 | ||
7181 | my_friendly_assert (TREE_CODE (t) == COMPOUND_STMT, 42); | |
f7d98d58 | 7182 | tsubst_expr (t, args, tmpl); |
a28e3c7f | 7183 | |
5566b478 | 7184 | finish_function (lineno, 0, nested); |
5566b478 MS |
7185 | } |
7186 | ||
de22184b | 7187 | out: |
5156628f MS |
7188 | lineno = line; |
7189 | input_filename = file; | |
7190 | ||
5566b478 | 7191 | pop_from_top_level (); |
5566b478 | 7192 | pop_tinst_level (); |
a28e3c7f | 7193 | |
a28e3c7f MS |
7194 | return d; |
7195 | } | |
5566b478 MS |
7196 | |
7197 | tree | |
7198 | tsubst_chain (t, argvec) | |
7199 | tree t, argvec; | |
7200 | { | |
7201 | if (t) | |
7202 | { | |
f7d98d58 | 7203 | tree first = tsubst (t, argvec, NULL_TREE); |
5566b478 MS |
7204 | tree last = first; |
7205 | ||
7206 | for (t = TREE_CHAIN (t); t; t = TREE_CHAIN (t)) | |
7207 | { | |
f7d98d58 | 7208 | tree x = tsubst (t, argvec, NULL_TREE); |
5566b478 MS |
7209 | TREE_CHAIN (last) = x; |
7210 | last = x; | |
7211 | } | |
7212 | ||
7213 | return first; | |
7214 | } | |
7215 | return NULL_TREE; | |
7216 | } | |
7217 | ||
824b9a4c | 7218 | static tree |
5566b478 MS |
7219 | tsubst_expr_values (t, argvec) |
7220 | tree t, argvec; | |
7221 | { | |
7222 | tree first = NULL_TREE; | |
7223 | tree *p = &first; | |
7224 | ||
7225 | for (; t; t = TREE_CHAIN (t)) | |
7226 | { | |
f7d98d58 JM |
7227 | tree pur = tsubst_copy (TREE_PURPOSE (t), argvec, NULL_TREE); |
7228 | tree val = tsubst_expr (TREE_VALUE (t), argvec, NULL_TREE); | |
5566b478 MS |
7229 | *p = build_tree_list (pur, val); |
7230 | p = &TREE_CHAIN (*p); | |
7231 | } | |
7232 | return first; | |
7233 | } | |
7234 | ||
7235 | tree last_tree; | |
7236 | ||
7237 | void | |
7238 | add_tree (t) | |
7239 | tree t; | |
7240 | { | |
7241 | last_tree = TREE_CHAIN (last_tree) = t; | |
7242 | } | |
73aad9b9 | 7243 | |
75650646 MM |
7244 | |
7245 | void | |
7246 | begin_tree () | |
7247 | { | |
7248 | saved_trees = tree_cons (NULL_TREE, last_tree, saved_trees); | |
7249 | last_tree = NULL_TREE; | |
7250 | } | |
7251 | ||
7252 | ||
7253 | void | |
7254 | end_tree () | |
7255 | { | |
7256 | my_friendly_assert (saved_trees != NULL_TREE, 0); | |
7257 | ||
7258 | last_tree = TREE_VALUE (saved_trees); | |
7259 | saved_trees = TREE_CHAIN (saved_trees); | |
7260 | } | |
7261 | ||
73aad9b9 JM |
7262 | /* D is an undefined function declaration in the presence of templates with |
7263 | the same name, listed in FNS. If one of them can produce D as an | |
7264 | instantiation, remember this so we can instantiate it at EOF if D has | |
7265 | not been defined by that time. */ | |
7266 | ||
7267 | void | |
7268 | add_maybe_template (d, fns) | |
7269 | tree d, fns; | |
7270 | { | |
7271 | tree t; | |
7272 | ||
7273 | if (DECL_MAYBE_TEMPLATE (d)) | |
7274 | return; | |
7275 | ||
e1467ff2 | 7276 | t = most_specialized (fns, d, NULL_TREE); |
73aad9b9 JM |
7277 | if (! t) |
7278 | return; | |
7279 | if (t == error_mark_node) | |
7280 | { | |
7281 | cp_error ("ambiguous template instantiation for `%D'", d); | |
7282 | return; | |
7283 | } | |
7284 | ||
7285 | *maybe_template_tail = perm_tree_cons (t, d, NULL_TREE); | |
7286 | maybe_template_tail = &TREE_CHAIN (*maybe_template_tail); | |
7287 | DECL_MAYBE_TEMPLATE (d) = 1; | |
7288 | } | |
b87692e5 MS |
7289 | |
7290 | /* Instantiate an enumerated type. Used by instantiate_class_template and | |
7291 | tsubst_expr. */ | |
7292 | ||
7293 | static tree | |
f7d98d58 | 7294 | tsubst_enum (tag, args, field_chain) |
98c1c668 | 7295 | tree tag, args; |
b3d5a58b | 7296 | tree * field_chain; |
b87692e5 | 7297 | { |
b3d5a58b JG |
7298 | extern tree current_local_enum; |
7299 | tree prev_local_enum = current_local_enum; | |
7300 | ||
b87692e5 MS |
7301 | tree newtag = start_enum (TYPE_IDENTIFIER (tag)); |
7302 | tree e, values = NULL_TREE; | |
7303 | ||
7304 | for (e = TYPE_VALUES (tag); e; e = TREE_CHAIN (e)) | |
7305 | { | |
7306 | tree elt = build_enumerator (TREE_PURPOSE (e), | |
7307 | tsubst_expr (TREE_VALUE (e), args, | |
f7d98d58 | 7308 | NULL_TREE)); |
b87692e5 MS |
7309 | TREE_CHAIN (elt) = values; |
7310 | values = elt; | |
7311 | } | |
7312 | ||
7313 | finish_enum (newtag, values); | |
7314 | ||
b3d5a58b | 7315 | if (NULL != field_chain) |
86052cc3 | 7316 | *field_chain = grok_enum_decls (NULL_TREE); |
b3d5a58b JG |
7317 | |
7318 | current_local_enum = prev_local_enum; | |
7319 | ||
b87692e5 MS |
7320 | return newtag; |
7321 | } |