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4ee9c684 | 1 | /* Declaration statement matcher |
8458f4ca | 2 | Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009 |
1a9745d2 | 3 | Free Software Foundation, Inc. |
4ee9c684 | 4 | Contributed by Andy Vaught |
5 | ||
c84b470d | 6 | This file is part of GCC. |
4ee9c684 | 7 | |
c84b470d | 8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
bdabe786 | 10 | Software Foundation; either version 3, or (at your option) any later |
c84b470d | 11 | version. |
4ee9c684 | 12 | |
c84b470d | 13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
4ee9c684 | 17 | |
18 | You should have received a copy of the GNU General Public License | |
bdabe786 | 19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
4ee9c684 | 21 | |
4ee9c684 | 22 | #include "config.h" |
7436502b | 23 | #include "system.h" |
4ee9c684 | 24 | #include "gfortran.h" |
25 | #include "match.h" | |
26 | #include "parse.h" | |
6f092e31 | 27 | #include "flags.h" |
4ee9c684 | 28 | |
cbbac028 | 29 | |
30 | /* Macros to access allocate memory for gfc_data_variable, | |
31 | gfc_data_value and gfc_data. */ | |
48d8ad5a | 32 | #define gfc_get_data_variable() XCNEW (gfc_data_variable) |
33 | #define gfc_get_data_value() XCNEW (gfc_data_value) | |
34 | #define gfc_get_data() XCNEW (gfc_data) | |
cbbac028 | 35 | |
36 | ||
36ae04f2 | 37 | /* This flag is set if an old-style length selector is matched |
4ee9c684 | 38 | during a type-declaration statement. */ |
39 | ||
40 | static int old_char_selector; | |
41 | ||
5739e54e | 42 | /* When variables acquire types and attributes from a declaration |
4ee9c684 | 43 | statement, they get them from the following static variables. The |
44 | first part of a declaration sets these variables and the second | |
45 | part copies these into symbol structures. */ | |
46 | ||
47 | static gfc_typespec current_ts; | |
48 | ||
49 | static symbol_attribute current_attr; | |
50 | static gfc_array_spec *current_as; | |
51 | static int colon_seen; | |
52 | ||
c5d33754 | 53 | /* The current binding label (if any). */ |
54 | static char curr_binding_label[GFC_MAX_BINDING_LABEL_LEN + 1]; | |
55 | /* Need to know how many identifiers are on the current data declaration | |
56 | line in case we're given the BIND(C) attribute with a NAME= specifier. */ | |
57 | static int num_idents_on_line; | |
58 | /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we | |
59 | can supply a name if the curr_binding_label is nil and NAME= was not. */ | |
60 | static int has_name_equals = 0; | |
61 | ||
3b6a4b41 | 62 | /* Initializer of the previous enumerator. */ |
63 | ||
64 | static gfc_expr *last_initializer; | |
65 | ||
66 | /* History of all the enumerators is maintained, so that | |
67 | kind values of all the enumerators could be updated depending | |
68 | upon the maximum initialized value. */ | |
69 | ||
70 | typedef struct enumerator_history | |
71 | { | |
72 | gfc_symbol *sym; | |
73 | gfc_expr *initializer; | |
74 | struct enumerator_history *next; | |
75 | } | |
76 | enumerator_history; | |
77 | ||
78 | /* Header of enum history chain. */ | |
79 | ||
80 | static enumerator_history *enum_history = NULL; | |
81 | ||
82 | /* Pointer of enum history node containing largest initializer. */ | |
83 | ||
84 | static enumerator_history *max_enum = NULL; | |
85 | ||
4ee9c684 | 86 | /* gfc_new_block points to the symbol of a newly matched block. */ |
87 | ||
88 | gfc_symbol *gfc_new_block; | |
89 | ||
077932f9 | 90 | bool gfc_matching_function; |
67a51c8e | 91 | |
4ee9c684 | 92 | |
b4f45d02 | 93 | /********************* DATA statement subroutines *********************/ |
94 | ||
1bfea7e8 | 95 | static bool in_match_data = false; |
96 | ||
97 | bool | |
98 | gfc_in_match_data (void) | |
99 | { | |
100 | return in_match_data; | |
101 | } | |
102 | ||
cbbac028 | 103 | static void |
104 | set_in_match_data (bool set_value) | |
1bfea7e8 | 105 | { |
106 | in_match_data = set_value; | |
107 | } | |
108 | ||
b4f45d02 | 109 | /* Free a gfc_data_variable structure and everything beneath it. */ |
110 | ||
111 | static void | |
1a9745d2 | 112 | free_variable (gfc_data_variable *p) |
b4f45d02 | 113 | { |
114 | gfc_data_variable *q; | |
115 | ||
116 | for (; p; p = q) | |
117 | { | |
118 | q = p->next; | |
119 | gfc_free_expr (p->expr); | |
120 | gfc_free_iterator (&p->iter, 0); | |
121 | free_variable (p->list); | |
b4f45d02 | 122 | gfc_free (p); |
123 | } | |
124 | } | |
125 | ||
126 | ||
127 | /* Free a gfc_data_value structure and everything beneath it. */ | |
128 | ||
129 | static void | |
1a9745d2 | 130 | free_value (gfc_data_value *p) |
b4f45d02 | 131 | { |
132 | gfc_data_value *q; | |
133 | ||
134 | for (; p; p = q) | |
135 | { | |
136 | q = p->next; | |
137 | gfc_free_expr (p->expr); | |
138 | gfc_free (p); | |
139 | } | |
140 | } | |
141 | ||
142 | ||
143 | /* Free a list of gfc_data structures. */ | |
144 | ||
145 | void | |
1a9745d2 | 146 | gfc_free_data (gfc_data *p) |
b4f45d02 | 147 | { |
148 | gfc_data *q; | |
149 | ||
150 | for (; p; p = q) | |
151 | { | |
152 | q = p->next; | |
b4f45d02 | 153 | free_variable (p->var); |
154 | free_value (p->value); | |
b4f45d02 | 155 | gfc_free (p); |
156 | } | |
157 | } | |
158 | ||
159 | ||
af29c1f0 | 160 | /* Free all data in a namespace. */ |
1a9745d2 | 161 | |
af29c1f0 | 162 | static void |
f6d0e37a | 163 | gfc_free_data_all (gfc_namespace *ns) |
af29c1f0 | 164 | { |
165 | gfc_data *d; | |
166 | ||
167 | for (;ns->data;) | |
168 | { | |
169 | d = ns->data->next; | |
170 | gfc_free (ns->data); | |
171 | ns->data = d; | |
172 | } | |
173 | } | |
174 | ||
175 | ||
b4f45d02 | 176 | static match var_element (gfc_data_variable *); |
177 | ||
178 | /* Match a list of variables terminated by an iterator and a right | |
179 | parenthesis. */ | |
180 | ||
181 | static match | |
1a9745d2 | 182 | var_list (gfc_data_variable *parent) |
b4f45d02 | 183 | { |
184 | gfc_data_variable *tail, var; | |
185 | match m; | |
186 | ||
187 | m = var_element (&var); | |
188 | if (m == MATCH_ERROR) | |
189 | return MATCH_ERROR; | |
190 | if (m == MATCH_NO) | |
191 | goto syntax; | |
192 | ||
193 | tail = gfc_get_data_variable (); | |
194 | *tail = var; | |
195 | ||
196 | parent->list = tail; | |
197 | ||
198 | for (;;) | |
199 | { | |
200 | if (gfc_match_char (',') != MATCH_YES) | |
201 | goto syntax; | |
202 | ||
203 | m = gfc_match_iterator (&parent->iter, 1); | |
204 | if (m == MATCH_YES) | |
205 | break; | |
206 | if (m == MATCH_ERROR) | |
207 | return MATCH_ERROR; | |
208 | ||
209 | m = var_element (&var); | |
210 | if (m == MATCH_ERROR) | |
211 | return MATCH_ERROR; | |
212 | if (m == MATCH_NO) | |
213 | goto syntax; | |
214 | ||
215 | tail->next = gfc_get_data_variable (); | |
216 | tail = tail->next; | |
217 | ||
218 | *tail = var; | |
219 | } | |
220 | ||
221 | if (gfc_match_char (')') != MATCH_YES) | |
222 | goto syntax; | |
223 | return MATCH_YES; | |
224 | ||
225 | syntax: | |
226 | gfc_syntax_error (ST_DATA); | |
227 | return MATCH_ERROR; | |
228 | } | |
229 | ||
230 | ||
231 | /* Match a single element in a data variable list, which can be a | |
232 | variable-iterator list. */ | |
233 | ||
234 | static match | |
c1977dbe | 235 | var_element (gfc_data_variable *new_var) |
b4f45d02 | 236 | { |
237 | match m; | |
238 | gfc_symbol *sym; | |
239 | ||
c1977dbe | 240 | memset (new_var, 0, sizeof (gfc_data_variable)); |
b4f45d02 | 241 | |
242 | if (gfc_match_char ('(') == MATCH_YES) | |
c1977dbe | 243 | return var_list (new_var); |
b4f45d02 | 244 | |
c1977dbe | 245 | m = gfc_match_variable (&new_var->expr, 0); |
b4f45d02 | 246 | if (m != MATCH_YES) |
247 | return m; | |
248 | ||
c1977dbe | 249 | sym = new_var->expr->symtree->n.sym; |
b4f45d02 | 250 | |
40de255b | 251 | /* Symbol should already have an associated type. */ |
252 | if (gfc_check_symbol_typed (sym, gfc_current_ns, | |
253 | false, gfc_current_locus) == FAILURE) | |
254 | return MATCH_ERROR; | |
255 | ||
1a9745d2 | 256 | if (!sym->attr.function && gfc_current_ns->parent |
257 | && gfc_current_ns->parent == sym->ns) | |
b4f45d02 | 258 | { |
c8df3e9c | 259 | gfc_error ("Host associated variable '%s' may not be in the DATA " |
7698a624 | 260 | "statement at %C", sym->name); |
b4f45d02 | 261 | return MATCH_ERROR; |
262 | } | |
263 | ||
c8df3e9c | 264 | if (gfc_current_state () != COMP_BLOCK_DATA |
1a9745d2 | 265 | && sym->attr.in_common |
266 | && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of " | |
267 | "common block variable '%s' in DATA statement at %C", | |
268 | sym->name) == FAILURE) | |
c8df3e9c | 269 | return MATCH_ERROR; |
b4f45d02 | 270 | |
c1977dbe | 271 | if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE) |
b4f45d02 | 272 | return MATCH_ERROR; |
273 | ||
274 | return MATCH_YES; | |
275 | } | |
276 | ||
277 | ||
278 | /* Match the top-level list of data variables. */ | |
279 | ||
280 | static match | |
1a9745d2 | 281 | top_var_list (gfc_data *d) |
b4f45d02 | 282 | { |
c1977dbe | 283 | gfc_data_variable var, *tail, *new_var; |
b4f45d02 | 284 | match m; |
285 | ||
286 | tail = NULL; | |
287 | ||
288 | for (;;) | |
289 | { | |
290 | m = var_element (&var); | |
291 | if (m == MATCH_NO) | |
292 | goto syntax; | |
293 | if (m == MATCH_ERROR) | |
294 | return MATCH_ERROR; | |
295 | ||
c1977dbe | 296 | new_var = gfc_get_data_variable (); |
297 | *new_var = var; | |
b4f45d02 | 298 | |
299 | if (tail == NULL) | |
c1977dbe | 300 | d->var = new_var; |
b4f45d02 | 301 | else |
c1977dbe | 302 | tail->next = new_var; |
b4f45d02 | 303 | |
c1977dbe | 304 | tail = new_var; |
b4f45d02 | 305 | |
306 | if (gfc_match_char ('/') == MATCH_YES) | |
307 | break; | |
308 | if (gfc_match_char (',') != MATCH_YES) | |
309 | goto syntax; | |
310 | } | |
311 | ||
312 | return MATCH_YES; | |
313 | ||
314 | syntax: | |
315 | gfc_syntax_error (ST_DATA); | |
af29c1f0 | 316 | gfc_free_data_all (gfc_current_ns); |
b4f45d02 | 317 | return MATCH_ERROR; |
318 | } | |
319 | ||
320 | ||
321 | static match | |
1a9745d2 | 322 | match_data_constant (gfc_expr **result) |
b4f45d02 | 323 | { |
324 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
325 | gfc_symbol *sym; | |
326 | gfc_expr *expr; | |
327 | match m; | |
096d4ad9 | 328 | locus old_loc; |
b4f45d02 | 329 | |
330 | m = gfc_match_literal_constant (&expr, 1); | |
331 | if (m == MATCH_YES) | |
332 | { | |
333 | *result = expr; | |
334 | return MATCH_YES; | |
335 | } | |
336 | ||
337 | if (m == MATCH_ERROR) | |
338 | return MATCH_ERROR; | |
339 | ||
340 | m = gfc_match_null (result); | |
341 | if (m != MATCH_NO) | |
342 | return m; | |
343 | ||
096d4ad9 | 344 | old_loc = gfc_current_locus; |
345 | ||
346 | /* Should this be a structure component, try to match it | |
347 | before matching a name. */ | |
348 | m = gfc_match_rvalue (result); | |
349 | if (m == MATCH_ERROR) | |
350 | return m; | |
351 | ||
352 | if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE) | |
353 | { | |
354 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
355 | m = MATCH_ERROR; | |
356 | return m; | |
357 | } | |
358 | ||
359 | gfc_current_locus = old_loc; | |
360 | ||
b4f45d02 | 361 | m = gfc_match_name (name); |
362 | if (m != MATCH_YES) | |
363 | return m; | |
364 | ||
365 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
366 | return MATCH_ERROR; | |
367 | ||
368 | if (sym == NULL | |
369 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
370 | { | |
371 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
372 | name); | |
373 | return MATCH_ERROR; | |
374 | } | |
375 | else if (sym->attr.flavor == FL_DERIVED) | |
ea94d76d | 376 | return gfc_match_structure_constructor (sym, result, false); |
b4f45d02 | 377 | |
f0a51891 | 378 | /* Check to see if the value is an initialization array expression. */ |
379 | if (sym->value->expr_type == EXPR_ARRAY) | |
380 | { | |
381 | gfc_current_locus = old_loc; | |
382 | ||
383 | m = gfc_match_init_expr (result); | |
384 | if (m == MATCH_ERROR) | |
385 | return m; | |
386 | ||
387 | if (m == MATCH_YES) | |
388 | { | |
389 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
390 | m = MATCH_ERROR; | |
391 | ||
392 | if ((*result)->expr_type == EXPR_CONSTANT) | |
393 | return m; | |
394 | else | |
395 | { | |
396 | gfc_error ("Invalid initializer %s in Data statement at %C", name); | |
397 | return MATCH_ERROR; | |
398 | } | |
399 | } | |
400 | } | |
401 | ||
b4f45d02 | 402 | *result = gfc_copy_expr (sym->value); |
403 | return MATCH_YES; | |
404 | } | |
405 | ||
406 | ||
407 | /* Match a list of values in a DATA statement. The leading '/' has | |
408 | already been seen at this point. */ | |
409 | ||
410 | static match | |
1a9745d2 | 411 | top_val_list (gfc_data *data) |
b4f45d02 | 412 | { |
c1977dbe | 413 | gfc_data_value *new_val, *tail; |
b4f45d02 | 414 | gfc_expr *expr; |
b4f45d02 | 415 | match m; |
416 | ||
417 | tail = NULL; | |
418 | ||
419 | for (;;) | |
420 | { | |
421 | m = match_data_constant (&expr); | |
422 | if (m == MATCH_NO) | |
423 | goto syntax; | |
424 | if (m == MATCH_ERROR) | |
425 | return MATCH_ERROR; | |
426 | ||
c1977dbe | 427 | new_val = gfc_get_data_value (); |
428 | mpz_init (new_val->repeat); | |
b4f45d02 | 429 | |
430 | if (tail == NULL) | |
c1977dbe | 431 | data->value = new_val; |
b4f45d02 | 432 | else |
c1977dbe | 433 | tail->next = new_val; |
b4f45d02 | 434 | |
c1977dbe | 435 | tail = new_val; |
b4f45d02 | 436 | |
437 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
438 | { | |
439 | tail->expr = expr; | |
7d74abfd | 440 | mpz_set_ui (tail->repeat, 1); |
b4f45d02 | 441 | } |
442 | else | |
443 | { | |
7d74abfd | 444 | if (expr->ts.type == BT_INTEGER) |
445 | mpz_set (tail->repeat, expr->value.integer); | |
b4f45d02 | 446 | gfc_free_expr (expr); |
b4f45d02 | 447 | |
448 | m = match_data_constant (&tail->expr); | |
449 | if (m == MATCH_NO) | |
450 | goto syntax; | |
451 | if (m == MATCH_ERROR) | |
452 | return MATCH_ERROR; | |
453 | } | |
454 | ||
455 | if (gfc_match_char ('/') == MATCH_YES) | |
456 | break; | |
457 | if (gfc_match_char (',') == MATCH_NO) | |
458 | goto syntax; | |
459 | } | |
460 | ||
461 | return MATCH_YES; | |
462 | ||
463 | syntax: | |
464 | gfc_syntax_error (ST_DATA); | |
af29c1f0 | 465 | gfc_free_data_all (gfc_current_ns); |
b4f45d02 | 466 | return MATCH_ERROR; |
467 | } | |
468 | ||
469 | ||
470 | /* Matches an old style initialization. */ | |
471 | ||
472 | static match | |
473 | match_old_style_init (const char *name) | |
474 | { | |
475 | match m; | |
476 | gfc_symtree *st; | |
344b937e | 477 | gfc_symbol *sym; |
b4f45d02 | 478 | gfc_data *newdata; |
479 | ||
480 | /* Set up data structure to hold initializers. */ | |
481 | gfc_find_sym_tree (name, NULL, 0, &st); | |
344b937e | 482 | sym = st->n.sym; |
483 | ||
b4f45d02 | 484 | newdata = gfc_get_data (); |
485 | newdata->var = gfc_get_data_variable (); | |
486 | newdata->var->expr = gfc_get_variable_expr (st); | |
5aed5db3 | 487 | newdata->where = gfc_current_locus; |
b4f45d02 | 488 | |
f6d0e37a | 489 | /* Match initial value list. This also eats the terminal '/'. */ |
b4f45d02 | 490 | m = top_val_list (newdata); |
491 | if (m != MATCH_YES) | |
492 | { | |
493 | gfc_free (newdata); | |
494 | return m; | |
495 | } | |
496 | ||
497 | if (gfc_pure (NULL)) | |
498 | { | |
499 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
500 | gfc_free (newdata); | |
501 | return MATCH_ERROR; | |
502 | } | |
503 | ||
344b937e | 504 | /* Mark the variable as having appeared in a data statement. */ |
505 | if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) | |
506 | { | |
507 | gfc_free (newdata); | |
508 | return MATCH_ERROR; | |
509 | } | |
510 | ||
b4f45d02 | 511 | /* Chain in namespace list of DATA initializers. */ |
512 | newdata->next = gfc_current_ns->data; | |
513 | gfc_current_ns->data = newdata; | |
514 | ||
515 | return m; | |
516 | } | |
517 | ||
1a9745d2 | 518 | |
b4f45d02 | 519 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
39fca56b | 520 | we are matching a DATA statement and are therefore issuing an error |
e14bee04 | 521 | if we encounter something unexpected, if not, we're trying to match |
fe06c0d5 | 522 | an old-style initialization expression of the form INTEGER I /2/. */ |
b4f45d02 | 523 | |
524 | match | |
525 | gfc_match_data (void) | |
526 | { | |
c1977dbe | 527 | gfc_data *new_data; |
b4f45d02 | 528 | match m; |
529 | ||
cbbac028 | 530 | set_in_match_data (true); |
1bfea7e8 | 531 | |
b4f45d02 | 532 | for (;;) |
533 | { | |
c1977dbe | 534 | new_data = gfc_get_data (); |
535 | new_data->where = gfc_current_locus; | |
b4f45d02 | 536 | |
c1977dbe | 537 | m = top_var_list (new_data); |
b4f45d02 | 538 | if (m != MATCH_YES) |
539 | goto cleanup; | |
540 | ||
c1977dbe | 541 | m = top_val_list (new_data); |
b4f45d02 | 542 | if (m != MATCH_YES) |
543 | goto cleanup; | |
544 | ||
c1977dbe | 545 | new_data->next = gfc_current_ns->data; |
546 | gfc_current_ns->data = new_data; | |
b4f45d02 | 547 | |
548 | if (gfc_match_eos () == MATCH_YES) | |
549 | break; | |
550 | ||
551 | gfc_match_char (','); /* Optional comma */ | |
552 | } | |
553 | ||
cbbac028 | 554 | set_in_match_data (false); |
1bfea7e8 | 555 | |
b4f45d02 | 556 | if (gfc_pure (NULL)) |
557 | { | |
558 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
559 | return MATCH_ERROR; | |
560 | } | |
561 | ||
562 | return MATCH_YES; | |
563 | ||
564 | cleanup: | |
cbbac028 | 565 | set_in_match_data (false); |
c1977dbe | 566 | gfc_free_data (new_data); |
b4f45d02 | 567 | return MATCH_ERROR; |
568 | } | |
569 | ||
570 | ||
571 | /************************ Declaration statements *********************/ | |
572 | ||
4ee9c684 | 573 | /* Match an intent specification. Since this can only happen after an |
574 | INTENT word, a legal intent-spec must follow. */ | |
575 | ||
576 | static sym_intent | |
577 | match_intent_spec (void) | |
578 | { | |
579 | ||
580 | if (gfc_match (" ( in out )") == MATCH_YES) | |
581 | return INTENT_INOUT; | |
582 | if (gfc_match (" ( in )") == MATCH_YES) | |
583 | return INTENT_IN; | |
584 | if (gfc_match (" ( out )") == MATCH_YES) | |
585 | return INTENT_OUT; | |
586 | ||
587 | gfc_error ("Bad INTENT specification at %C"); | |
588 | return INTENT_UNKNOWN; | |
589 | } | |
590 | ||
591 | ||
592 | /* Matches a character length specification, which is either a | |
593 | specification expression or a '*'. */ | |
594 | ||
595 | static match | |
1a9745d2 | 596 | char_len_param_value (gfc_expr **expr) |
4ee9c684 | 597 | { |
294d58d3 | 598 | match m; |
599 | ||
4ee9c684 | 600 | if (gfc_match_char ('*') == MATCH_YES) |
601 | { | |
602 | *expr = NULL; | |
603 | return MATCH_YES; | |
604 | } | |
605 | ||
294d58d3 | 606 | m = gfc_match_expr (expr); |
40de255b | 607 | |
608 | if (m == MATCH_YES | |
609 | && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE) | |
610 | return MATCH_ERROR; | |
611 | ||
294d58d3 | 612 | if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION) |
613 | { | |
614 | if ((*expr)->value.function.actual | |
615 | && (*expr)->value.function.actual->expr->symtree) | |
616 | { | |
617 | gfc_expr *e; | |
618 | e = (*expr)->value.function.actual->expr; | |
619 | if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE | |
620 | && e->expr_type == EXPR_VARIABLE) | |
621 | { | |
622 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) | |
623 | goto syntax; | |
624 | if (e->symtree->n.sym->ts.type == BT_CHARACTER | |
eeebe20b | 625 | && e->symtree->n.sym->ts.u.cl |
626 | && e->symtree->n.sym->ts.u.cl->length->ts.type == BT_UNKNOWN) | |
294d58d3 | 627 | goto syntax; |
628 | } | |
629 | } | |
630 | } | |
631 | return m; | |
632 | ||
633 | syntax: | |
634 | gfc_error ("Conflict in attributes of function argument at %C"); | |
635 | return MATCH_ERROR; | |
4ee9c684 | 636 | } |
637 | ||
638 | ||
639 | /* A character length is a '*' followed by a literal integer or a | |
640 | char_len_param_value in parenthesis. */ | |
641 | ||
642 | static match | |
1a9745d2 | 643 | match_char_length (gfc_expr **expr) |
4ee9c684 | 644 | { |
3bd3b616 | 645 | int length; |
4ee9c684 | 646 | match m; |
647 | ||
648 | m = gfc_match_char ('*'); | |
649 | if (m != MATCH_YES) | |
650 | return m; | |
651 | ||
3bd3b616 | 652 | m = gfc_match_small_literal_int (&length, NULL); |
4ee9c684 | 653 | if (m == MATCH_ERROR) |
654 | return m; | |
655 | ||
656 | if (m == MATCH_YES) | |
657 | { | |
8e9b41f0 | 658 | if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: " |
659 | "Old-style character length at %C") == FAILURE) | |
660 | return MATCH_ERROR; | |
4ee9c684 | 661 | *expr = gfc_int_expr (length); |
662 | return m; | |
663 | } | |
664 | ||
665 | if (gfc_match_char ('(') == MATCH_NO) | |
666 | goto syntax; | |
667 | ||
668 | m = char_len_param_value (expr); | |
077932f9 | 669 | if (m != MATCH_YES && gfc_matching_function) |
670 | { | |
671 | gfc_undo_symbols (); | |
672 | m = MATCH_YES; | |
673 | } | |
674 | ||
4ee9c684 | 675 | if (m == MATCH_ERROR) |
676 | return m; | |
677 | if (m == MATCH_NO) | |
678 | goto syntax; | |
679 | ||
680 | if (gfc_match_char (')') == MATCH_NO) | |
681 | { | |
682 | gfc_free_expr (*expr); | |
683 | *expr = NULL; | |
684 | goto syntax; | |
685 | } | |
686 | ||
687 | return MATCH_YES; | |
688 | ||
689 | syntax: | |
690 | gfc_error ("Syntax error in character length specification at %C"); | |
691 | return MATCH_ERROR; | |
692 | } | |
693 | ||
694 | ||
ee893be6 | 695 | /* Special subroutine for finding a symbol. Check if the name is found |
696 | in the current name space. If not, and we're compiling a function or | |
697 | subroutine and the parent compilation unit is an interface, then check | |
698 | to see if the name we've been given is the name of the interface | |
699 | (located in another namespace). */ | |
4ee9c684 | 700 | |
701 | static int | |
36b0a1b0 | 702 | find_special (const char *name, gfc_symbol **result, bool allow_subroutine) |
4ee9c684 | 703 | { |
704 | gfc_state_data *s; | |
36b0a1b0 | 705 | gfc_symtree *st; |
ee893be6 | 706 | int i; |
4ee9c684 | 707 | |
36b0a1b0 | 708 | i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine); |
e14bee04 | 709 | if (i == 0) |
36b0a1b0 | 710 | { |
711 | *result = st ? st->n.sym : NULL; | |
712 | goto end; | |
713 | } | |
e14bee04 | 714 | |
4ee9c684 | 715 | if (gfc_current_state () != COMP_SUBROUTINE |
716 | && gfc_current_state () != COMP_FUNCTION) | |
ee893be6 | 717 | goto end; |
4ee9c684 | 718 | |
719 | s = gfc_state_stack->previous; | |
720 | if (s == NULL) | |
ee893be6 | 721 | goto end; |
4ee9c684 | 722 | |
723 | if (s->state != COMP_INTERFACE) | |
ee893be6 | 724 | goto end; |
4ee9c684 | 725 | if (s->sym == NULL) |
f6d0e37a | 726 | goto end; /* Nameless interface. */ |
4ee9c684 | 727 | |
728 | if (strcmp (name, s->sym->name) == 0) | |
729 | { | |
730 | *result = s->sym; | |
731 | return 0; | |
732 | } | |
733 | ||
ee893be6 | 734 | end: |
735 | return i; | |
4ee9c684 | 736 | } |
737 | ||
738 | ||
739 | /* Special subroutine for getting a symbol node associated with a | |
740 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
741 | symbol is created in the parent using with symtree node in the | |
742 | child unit pointing to the symbol. If the current namespace has no | |
743 | parent, then the symbol is just created in the current unit. */ | |
744 | ||
745 | static int | |
1a9745d2 | 746 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
4ee9c684 | 747 | { |
748 | gfc_symtree *st; | |
749 | gfc_symbol *sym; | |
2ddb8ed9 | 750 | int rc = 0; |
4ee9c684 | 751 | |
d77f260f | 752 | /* Module functions have to be left in their own namespace because |
753 | they have potentially (almost certainly!) already been referenced. | |
754 | In this sense, they are rather like external functions. This is | |
755 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
756 | space is set to point to the master function, so that the fake | |
757 | result mechanism can work. */ | |
758 | if (module_fcn_entry) | |
861d824f | 759 | { |
760 | /* Present if entry is declared to be a module procedure. */ | |
761 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); | |
c6a05992 | 762 | |
861d824f | 763 | if (*result == NULL) |
764 | rc = gfc_get_symbol (name, NULL, result); | |
a78f714d | 765 | else if (!gfc_get_symbol (name, NULL, &sym) && sym |
c6a05992 | 766 | && (*result)->ts.type == BT_UNKNOWN |
767 | && sym->attr.flavor == FL_UNKNOWN) | |
768 | /* Pick up the typespec for the entry, if declared in the function | |
769 | body. Note that this symbol is FL_UNKNOWN because it will | |
770 | only have appeared in a type declaration. The local symtree | |
771 | is set to point to the module symbol and a unique symtree | |
772 | to the local version. This latter ensures a correct clearing | |
773 | of the symbols. */ | |
a78f714d | 774 | { |
775 | /* If the ENTRY proceeds its specification, we need to ensure | |
776 | that this does not raise a "has no IMPLICIT type" error. */ | |
777 | if (sym->ts.type == BT_UNKNOWN) | |
2168078b | 778 | sym->attr.untyped = 1; |
a78f714d | 779 | |
2168078b | 780 | (*result)->ts = sym->ts; |
a78f714d | 781 | |
782 | /* Put the symbol in the procedure namespace so that, should | |
69b1505f | 783 | the ENTRY precede its specification, the specification |
a78f714d | 784 | can be applied. */ |
785 | (*result)->ns = gfc_current_ns; | |
786 | ||
787 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); | |
788 | st->n.sym = *result; | |
789 | st = gfc_get_unique_symtree (gfc_current_ns); | |
790 | st->n.sym = sym; | |
791 | } | |
861d824f | 792 | } |
858f9894 | 793 | else |
794 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
4ee9c684 | 795 | |
2ddb8ed9 | 796 | if (rc) |
797 | return rc; | |
798 | ||
858f9894 | 799 | sym = *result; |
c717e399 | 800 | gfc_current_ns->refs++; |
4ee9c684 | 801 | |
c1977dbe | 802 | if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE) |
858f9894 | 803 | { |
16f49153 | 804 | /* Trap another encompassed procedure with the same name. All |
805 | these conditions are necessary to avoid picking up an entry | |
806 | whose name clashes with that of the encompassing procedure; | |
807 | this is handled using gsymbols to register unique,globally | |
808 | accessible names. */ | |
858f9894 | 809 | if (sym->attr.flavor != 0 |
1a9745d2 | 810 | && sym->attr.proc != 0 |
811 | && (sym->attr.subroutine || sym->attr.function) | |
812 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
858f9894 | 813 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
814 | name, &sym->declared_at); | |
815 | ||
5720fd2f | 816 | /* Trap a procedure with a name the same as interface in the |
817 | encompassing scope. */ | |
818 | if (sym->attr.generic != 0 | |
db697236 | 819 | && (sym->attr.subroutine || sym->attr.function) |
820 | && !sym->attr.mod_proc) | |
5720fd2f | 821 | gfc_error_now ("Name '%s' at %C is already defined" |
822 | " as a generic interface at %L", | |
823 | name, &sym->declared_at); | |
824 | ||
858f9894 | 825 | /* Trap declarations of attributes in encompassing scope. The |
826 | signature for this is that ts.kind is set. Legitimate | |
827 | references only set ts.type. */ | |
828 | if (sym->ts.kind != 0 | |
1a9745d2 | 829 | && !sym->attr.implicit_type |
830 | && sym->attr.proc == 0 | |
831 | && gfc_current_ns->parent != NULL | |
832 | && sym->attr.access == 0 | |
833 | && !module_fcn_entry) | |
834 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
835 | "and must not have attributes declared at %L", | |
858f9894 | 836 | name, &sym->declared_at); |
837 | } | |
838 | ||
839 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
840 | return rc; | |
4ee9c684 | 841 | |
d77f260f | 842 | /* Module function entries will already have a symtree in |
843 | the current namespace but will need one at module level. */ | |
844 | if (module_fcn_entry) | |
861d824f | 845 | { |
846 | /* Present if entry is declared to be a module procedure. */ | |
847 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); | |
848 | if (st == NULL) | |
849 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
850 | } | |
d77f260f | 851 | else |
852 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
4ee9c684 | 853 | |
4ee9c684 | 854 | st->n.sym = sym; |
855 | sym->refs++; | |
856 | ||
f6d0e37a | 857 | /* See if the procedure should be a module procedure. */ |
4ee9c684 | 858 | |
d77f260f | 859 | if (((sym->ns->proc_name != NULL |
861d824f | 860 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
861 | && sym->attr.proc != PROC_MODULE) | |
862 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) | |
863 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
864 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 865 | rc = 2; |
866 | ||
867 | return rc; | |
868 | } | |
869 | ||
870 | ||
c5d33754 | 871 | /* Verify that the given symbol representing a parameter is C |
872 | interoperable, by checking to see if it was marked as such after | |
873 | its declaration. If the given symbol is not interoperable, a | |
874 | warning is reported, thus removing the need to return the status to | |
875 | the calling function. The standard does not require the user use | |
876 | one of the iso_c_binding named constants to declare an | |
877 | interoperable parameter, but we can't be sure if the param is C | |
878 | interop or not if the user doesn't. For example, integer(4) may be | |
879 | legal Fortran, but doesn't have meaning in C. It may interop with | |
880 | a number of the C types, which causes a problem because the | |
881 | compiler can't know which one. This code is almost certainly not | |
882 | portable, and the user will get what they deserve if the C type | |
883 | across platforms isn't always interoperable with integer(4). If | |
884 | the user had used something like integer(c_int) or integer(c_long), | |
885 | the compiler could have automatically handled the varying sizes | |
886 | across platforms. */ | |
887 | ||
f6bb8f4b | 888 | gfc_try |
c5d33754 | 889 | verify_c_interop_param (gfc_symbol *sym) |
890 | { | |
891 | int is_c_interop = 0; | |
f6bb8f4b | 892 | gfc_try retval = SUCCESS; |
c5d33754 | 893 | |
894 | /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). | |
895 | Don't repeat the checks here. */ | |
896 | if (sym->attr.implicit_type) | |
897 | return SUCCESS; | |
898 | ||
899 | /* For subroutines or functions that are passed to a BIND(C) procedure, | |
900 | they're interoperable if they're BIND(C) and their params are all | |
901 | interoperable. */ | |
902 | if (sym->attr.flavor == FL_PROCEDURE) | |
903 | { | |
904 | if (sym->attr.is_bind_c == 0) | |
905 | { | |
906 | gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " | |
907 | "attribute to be C interoperable", sym->name, | |
908 | &(sym->declared_at)); | |
909 | ||
910 | return FAILURE; | |
911 | } | |
912 | else | |
913 | { | |
914 | if (sym->attr.is_c_interop == 1) | |
915 | /* We've already checked this procedure; don't check it again. */ | |
916 | return SUCCESS; | |
917 | else | |
918 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, | |
919 | sym->common_block); | |
920 | } | |
921 | } | |
922 | ||
923 | /* See if we've stored a reference to a procedure that owns sym. */ | |
924 | if (sym->ns != NULL && sym->ns->proc_name != NULL) | |
925 | { | |
926 | if (sym->ns->proc_name->attr.is_bind_c == 1) | |
927 | { | |
928 | is_c_interop = | |
209d3778 | 929 | (verify_c_interop (&(sym->ts)) |
c5d33754 | 930 | == SUCCESS ? 1 : 0); |
931 | ||
932 | if (is_c_interop != 1) | |
933 | { | |
934 | /* Make personalized messages to give better feedback. */ | |
935 | if (sym->ts.type == BT_DERIVED) | |
936 | gfc_error ("Type '%s' at %L is a parameter to the BIND(C) " | |
937 | " procedure '%s' but is not C interoperable " | |
938 | "because derived type '%s' is not C interoperable", | |
939 | sym->name, &(sym->declared_at), | |
940 | sym->ns->proc_name->name, | |
eeebe20b | 941 | sym->ts.u.derived->name); |
c5d33754 | 942 | else |
943 | gfc_warning ("Variable '%s' at %L is a parameter to the " | |
944 | "BIND(C) procedure '%s' but may not be C " | |
945 | "interoperable", | |
946 | sym->name, &(sym->declared_at), | |
947 | sym->ns->proc_name->name); | |
948 | } | |
e4eda3ec | 949 | |
950 | /* Character strings are only C interoperable if they have a | |
951 | length of 1. */ | |
952 | if (sym->ts.type == BT_CHARACTER) | |
953 | { | |
eeebe20b | 954 | gfc_charlen *cl = sym->ts.u.cl; |
e4eda3ec | 955 | if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT |
956 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) | |
957 | { | |
958 | gfc_error ("Character argument '%s' at %L " | |
959 | "must be length 1 because " | |
960 | "procedure '%s' is BIND(C)", | |
961 | sym->name, &sym->declared_at, | |
962 | sym->ns->proc_name->name); | |
963 | retval = FAILURE; | |
964 | } | |
965 | } | |
966 | ||
c5d33754 | 967 | /* We have to make sure that any param to a bind(c) routine does |
968 | not have the allocatable, pointer, or optional attributes, | |
969 | according to J3/04-007, section 5.1. */ | |
970 | if (sym->attr.allocatable == 1) | |
971 | { | |
972 | gfc_error ("Variable '%s' at %L cannot have the " | |
973 | "ALLOCATABLE attribute because procedure '%s'" | |
974 | " is BIND(C)", sym->name, &(sym->declared_at), | |
975 | sym->ns->proc_name->name); | |
976 | retval = FAILURE; | |
977 | } | |
978 | ||
979 | if (sym->attr.pointer == 1) | |
980 | { | |
981 | gfc_error ("Variable '%s' at %L cannot have the " | |
982 | "POINTER attribute because procedure '%s'" | |
983 | " is BIND(C)", sym->name, &(sym->declared_at), | |
984 | sym->ns->proc_name->name); | |
985 | retval = FAILURE; | |
986 | } | |
987 | ||
988 | if (sym->attr.optional == 1) | |
989 | { | |
990 | gfc_error ("Variable '%s' at %L cannot have the " | |
991 | "OPTIONAL attribute because procedure '%s'" | |
992 | " is BIND(C)", sym->name, &(sym->declared_at), | |
993 | sym->ns->proc_name->name); | |
994 | retval = FAILURE; | |
995 | } | |
996 | ||
997 | /* Make sure that if it has the dimension attribute, that it is | |
998 | either assumed size or explicit shape. */ | |
999 | if (sym->as != NULL) | |
1000 | { | |
1001 | if (sym->as->type == AS_ASSUMED_SHAPE) | |
1002 | { | |
1003 | gfc_error ("Assumed-shape array '%s' at %L cannot be an " | |
1004 | "argument to the procedure '%s' at %L because " | |
1005 | "the procedure is BIND(C)", sym->name, | |
1006 | &(sym->declared_at), sym->ns->proc_name->name, | |
1007 | &(sym->ns->proc_name->declared_at)); | |
1008 | retval = FAILURE; | |
1009 | } | |
1010 | ||
1011 | if (sym->as->type == AS_DEFERRED) | |
1012 | { | |
1013 | gfc_error ("Deferred-shape array '%s' at %L cannot be an " | |
1014 | "argument to the procedure '%s' at %L because " | |
1015 | "the procedure is BIND(C)", sym->name, | |
1016 | &(sym->declared_at), sym->ns->proc_name->name, | |
1017 | &(sym->ns->proc_name->declared_at)); | |
1018 | retval = FAILURE; | |
1019 | } | |
1020 | } | |
1021 | } | |
1022 | } | |
1023 | ||
1024 | return retval; | |
1025 | } | |
1026 | ||
1027 | ||
1028 | /* Function called by variable_decl() that adds a name to the symbol table. */ | |
4ee9c684 | 1029 | |
f6bb8f4b | 1030 | static gfc_try |
1a9745d2 | 1031 | build_sym (const char *name, gfc_charlen *cl, |
1032 | gfc_array_spec **as, locus *var_locus) | |
4ee9c684 | 1033 | { |
1034 | symbol_attribute attr; | |
1035 | gfc_symbol *sym; | |
1036 | ||
ee893be6 | 1037 | if (gfc_get_symbol (name, NULL, &sym)) |
4ee9c684 | 1038 | return FAILURE; |
1039 | ||
f6d0e37a | 1040 | /* Start updating the symbol table. Add basic type attribute if present. */ |
4ee9c684 | 1041 | if (current_ts.type != BT_UNKNOWN |
1a9745d2 | 1042 | && (sym->attr.implicit_type == 0 |
1043 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
4ee9c684 | 1044 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
1045 | return FAILURE; | |
1046 | ||
1047 | if (sym->ts.type == BT_CHARACTER) | |
eeebe20b | 1048 | sym->ts.u.cl = cl; |
4ee9c684 | 1049 | |
1050 | /* Add dimension attribute if present. */ | |
1051 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
1052 | return FAILURE; | |
1053 | *as = NULL; | |
1054 | ||
1055 | /* Add attribute to symbol. The copy is so that we can reset the | |
1056 | dimension attribute. */ | |
1057 | attr = current_attr; | |
1058 | attr.dimension = 0; | |
1059 | ||
1060 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
1061 | return FAILURE; | |
1062 | ||
c5d33754 | 1063 | /* Finish any work that may need to be done for the binding label, |
1064 | if it's a bind(c). The bind(c) attr is found before the symbol | |
1065 | is made, and before the symbol name (for data decls), so the | |
1066 | current_ts is holding the binding label, or nothing if the | |
1067 | name= attr wasn't given. Therefore, test here if we're dealing | |
1068 | with a bind(c) and make sure the binding label is set correctly. */ | |
1069 | if (sym->attr.is_bind_c == 1) | |
1070 | { | |
1071 | if (sym->binding_label[0] == '\0') | |
1072 | { | |
825718f9 | 1073 | /* Set the binding label and verify that if a NAME= was specified |
1074 | then only one identifier was in the entity-decl-list. */ | |
1075 | if (set_binding_label (sym->binding_label, sym->name, | |
1076 | num_idents_on_line) == FAILURE) | |
c5d33754 | 1077 | return FAILURE; |
1078 | } | |
1079 | } | |
1080 | ||
1081 | /* See if we know we're in a common block, and if it's a bind(c) | |
1082 | common then we need to make sure we're an interoperable type. */ | |
1083 | if (sym->attr.in_common == 1) | |
1084 | { | |
1085 | /* Test the common block object. */ | |
1086 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 | |
1087 | && sym->ts.is_c_interop != 1) | |
1088 | { | |
1089 | gfc_error_now ("Variable '%s' in common block '%s' at %C " | |
1090 | "must be declared with a C interoperable " | |
1091 | "kind since common block '%s' is BIND(C)", | |
1092 | sym->name, sym->common_block->name, | |
1093 | sym->common_block->name); | |
1094 | gfc_clear_error (); | |
1095 | } | |
1096 | } | |
1097 | ||
2457a77e | 1098 | sym->attr.implied_index = 0; |
1099 | ||
4ee9c684 | 1100 | return SUCCESS; |
1101 | } | |
1102 | ||
1a9745d2 | 1103 | |
a270dc8e | 1104 | /* Set character constant to the given length. The constant will be padded or |
d1a39099 | 1105 | truncated. If we're inside an array constructor without a typespec, we |
1106 | additionally check that all elements have the same length; check_len -1 | |
1107 | means no checking. */ | |
a270dc8e | 1108 | |
1109 | void | |
d1a39099 | 1110 | gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len) |
a270dc8e | 1111 | { |
c32f863c | 1112 | gfc_char_t *s; |
a270dc8e | 1113 | int slen; |
1114 | ||
1115 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
b44437b9 | 1116 | gcc_assert (expr->ts.type == BT_CHARACTER); |
a270dc8e | 1117 | |
1118 | slen = expr->value.character.length; | |
1119 | if (len != slen) | |
1120 | { | |
c32f863c | 1121 | s = gfc_get_wide_string (len + 1); |
1122 | memcpy (s, expr->value.character.string, | |
1123 | MIN (len, slen) * sizeof (gfc_char_t)); | |
a270dc8e | 1124 | if (len > slen) |
c32f863c | 1125 | gfc_wide_memset (&s[slen], ' ', len - slen); |
1bfea7e8 | 1126 | |
1127 | if (gfc_option.warn_character_truncation && slen > len) | |
1128 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
1129 | "(%d/%d)", &expr->where, slen, len); | |
1130 | ||
1131 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
1132 | initializers. */ | |
d1a39099 | 1133 | if (check_len != -1 && slen != check_len |
1134 | && !(gfc_option.allow_std & GFC_STD_GNU)) | |
1bfea7e8 | 1135 | gfc_error_now ("The CHARACTER elements of the array constructor " |
1136 | "at %L must have the same length (%d/%d)", | |
d1a39099 | 1137 | &expr->where, slen, check_len); |
1bfea7e8 | 1138 | |
89f528df | 1139 | s[len] = '\0'; |
a270dc8e | 1140 | gfc_free (expr->value.character.string); |
1141 | expr->value.character.string = s; | |
1142 | expr->value.character.length = len; | |
1143 | } | |
1144 | } | |
4ee9c684 | 1145 | |
3b6a4b41 | 1146 | |
e14bee04 | 1147 | /* Function to create and update the enumerator history |
3b6a4b41 | 1148 | using the information passed as arguments. |
e14bee04 | 1149 | Pointer "max_enum" is also updated, to point to |
1150 | enum history node containing largest initializer. | |
3b6a4b41 | 1151 | |
1152 | SYM points to the symbol node of enumerator. | |
f6d0e37a | 1153 | INIT points to its enumerator value. */ |
3b6a4b41 | 1154 | |
e14bee04 | 1155 | static void |
1a9745d2 | 1156 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
3b6a4b41 | 1157 | { |
1158 | enumerator_history *new_enum_history; | |
1159 | gcc_assert (sym != NULL && init != NULL); | |
1160 | ||
48d8ad5a | 1161 | new_enum_history = XCNEW (enumerator_history); |
3b6a4b41 | 1162 | |
1163 | new_enum_history->sym = sym; | |
1164 | new_enum_history->initializer = init; | |
1165 | new_enum_history->next = NULL; | |
1166 | ||
1167 | if (enum_history == NULL) | |
1168 | { | |
1169 | enum_history = new_enum_history; | |
1170 | max_enum = enum_history; | |
1171 | } | |
1172 | else | |
1173 | { | |
1174 | new_enum_history->next = enum_history; | |
1175 | enum_history = new_enum_history; | |
1176 | ||
e14bee04 | 1177 | if (mpz_cmp (max_enum->initializer->value.integer, |
3b6a4b41 | 1178 | new_enum_history->initializer->value.integer) < 0) |
1a9745d2 | 1179 | max_enum = new_enum_history; |
3b6a4b41 | 1180 | } |
1181 | } | |
1182 | ||
1183 | ||
e14bee04 | 1184 | /* Function to free enum kind history. */ |
3b6a4b41 | 1185 | |
e14bee04 | 1186 | void |
1a9745d2 | 1187 | gfc_free_enum_history (void) |
3b6a4b41 | 1188 | { |
e14bee04 | 1189 | enumerator_history *current = enum_history; |
1190 | enumerator_history *next; | |
3b6a4b41 | 1191 | |
1192 | while (current != NULL) | |
1193 | { | |
1194 | next = current->next; | |
1195 | gfc_free (current); | |
1196 | current = next; | |
1197 | } | |
1198 | max_enum = NULL; | |
1199 | enum_history = NULL; | |
1200 | } | |
1201 | ||
1202 | ||
4ee9c684 | 1203 | /* Function called by variable_decl() that adds an initialization |
1204 | expression to a symbol. */ | |
1205 | ||
f6bb8f4b | 1206 | static gfc_try |
f6d0e37a | 1207 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) |
4ee9c684 | 1208 | { |
1209 | symbol_attribute attr; | |
1210 | gfc_symbol *sym; | |
1211 | gfc_expr *init; | |
1212 | ||
1213 | init = *initp; | |
36b0a1b0 | 1214 | if (find_special (name, &sym, false)) |
4ee9c684 | 1215 | return FAILURE; |
1216 | ||
1217 | attr = sym->attr; | |
1218 | ||
1219 | /* If this symbol is confirming an implicit parameter type, | |
1220 | then an initialization expression is not allowed. */ | |
1221 | if (attr.flavor == FL_PARAMETER | |
1222 | && sym->value != NULL | |
1223 | && *initp != NULL) | |
1224 | { | |
1225 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
1226 | sym->name); | |
1227 | return FAILURE; | |
1228 | } | |
1229 | ||
1230 | if (init == NULL) | |
1231 | { | |
1232 | /* An initializer is required for PARAMETER declarations. */ | |
1233 | if (attr.flavor == FL_PARAMETER) | |
1234 | { | |
1235 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
1236 | return FAILURE; | |
1237 | } | |
1238 | } | |
1239 | else | |
1240 | { | |
1241 | /* If a variable appears in a DATA block, it cannot have an | |
b97f1a18 | 1242 | initializer. */ |
4ee9c684 | 1243 | if (sym->attr.data) |
1244 | { | |
1a9745d2 | 1245 | gfc_error ("Variable '%s' at %C with an initializer already " |
1246 | "appears in a DATA statement", sym->name); | |
4ee9c684 | 1247 | return FAILURE; |
1248 | } | |
1249 | ||
cca3db55 | 1250 | /* Check if the assignment can happen. This has to be put off |
1251 | until later for a derived type variable. */ | |
4ee9c684 | 1252 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
1253 | && gfc_check_assign_symbol (sym, init) == FAILURE) | |
1254 | return FAILURE; | |
1255 | ||
eeebe20b | 1256 | if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl |
da540712 | 1257 | && init->ts.type == BT_CHARACTER) |
a270dc8e | 1258 | { |
1259 | /* Update symbol character length according initializer. */ | |
da540712 | 1260 | if (gfc_check_assign_symbol (sym, init) == FAILURE) |
1261 | return FAILURE; | |
1262 | ||
eeebe20b | 1263 | if (sym->ts.u.cl->length == NULL) |
a270dc8e | 1264 | { |
03c2a028 | 1265 | int clen; |
f6d0e37a | 1266 | /* If there are multiple CHARACTER variables declared on the |
1267 | same line, we don't want them to share the same length. */ | |
d270ce52 | 1268 | sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
e9c873a4 | 1269 | |
03c2a028 | 1270 | if (sym->attr.flavor == FL_PARAMETER) |
1271 | { | |
1272 | if (init->expr_type == EXPR_CONSTANT) | |
1273 | { | |
1274 | clen = init->value.character.length; | |
eeebe20b | 1275 | sym->ts.u.cl->length = gfc_int_expr (clen); |
03c2a028 | 1276 | } |
1277 | else if (init->expr_type == EXPR_ARRAY) | |
1278 | { | |
1279 | gfc_expr *p = init->value.constructor->expr; | |
1280 | clen = p->value.character.length; | |
eeebe20b | 1281 | sym->ts.u.cl->length = gfc_int_expr (clen); |
03c2a028 | 1282 | } |
eeebe20b | 1283 | else if (init->ts.u.cl && init->ts.u.cl->length) |
1284 | sym->ts.u.cl->length = | |
1285 | gfc_copy_expr (sym->value->ts.u.cl->length); | |
03c2a028 | 1286 | } |
a270dc8e | 1287 | } |
1288 | /* Update initializer character length according symbol. */ | |
eeebe20b | 1289 | else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT) |
a270dc8e | 1290 | { |
eeebe20b | 1291 | int len = mpz_get_si (sym->ts.u.cl->length->value.integer); |
a270dc8e | 1292 | gfc_constructor * p; |
1293 | ||
1294 | if (init->expr_type == EXPR_CONSTANT) | |
d1a39099 | 1295 | gfc_set_constant_character_len (len, init, -1); |
a270dc8e | 1296 | else if (init->expr_type == EXPR_ARRAY) |
1297 | { | |
39908fd9 | 1298 | /* Build a new charlen to prevent simplification from |
1299 | deleting the length before it is resolved. */ | |
d270ce52 | 1300 | init->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
eeebe20b | 1301 | init->ts.u.cl->length = gfc_copy_expr (sym->ts.u.cl->length); |
39908fd9 | 1302 | |
a270dc8e | 1303 | for (p = init->value.constructor; p; p = p->next) |
d1a39099 | 1304 | gfc_set_constant_character_len (len, p->expr, -1); |
a270dc8e | 1305 | } |
1306 | } | |
1307 | } | |
1308 | ||
c5d33754 | 1309 | /* Need to check if the expression we initialized this |
1310 | to was one of the iso_c_binding named constants. If so, | |
1311 | and we're a parameter (constant), let it be iso_c. | |
1312 | For example: | |
1313 | integer(c_int), parameter :: my_int = c_int | |
1314 | integer(my_int) :: my_int_2 | |
1315 | If we mark my_int as iso_c (since we can see it's value | |
1316 | is equal to one of the named constants), then my_int_2 | |
1317 | will be considered C interoperable. */ | |
1318 | if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) | |
1319 | { | |
1320 | sym->ts.is_iso_c |= init->ts.is_iso_c; | |
1321 | sym->ts.is_c_interop |= init->ts.is_c_interop; | |
1322 | /* attr bits needed for module files. */ | |
1323 | sym->attr.is_iso_c |= init->ts.is_iso_c; | |
1324 | sym->attr.is_c_interop |= init->ts.is_c_interop; | |
1325 | if (init->ts.is_iso_c) | |
1326 | sym->ts.f90_type = init->ts.f90_type; | |
1327 | } | |
1328 | ||
4ee9c684 | 1329 | /* Add initializer. Make sure we keep the ranks sane. */ |
1330 | if (sym->attr.dimension && init->rank == 0) | |
7baa3fb4 | 1331 | { |
1332 | mpz_t size; | |
1333 | gfc_expr *array; | |
1334 | gfc_constructor *c; | |
1335 | int n; | |
1336 | if (sym->attr.flavor == FL_PARAMETER | |
1337 | && init->expr_type == EXPR_CONSTANT | |
1338 | && spec_size (sym->as, &size) == SUCCESS | |
1339 | && mpz_cmp_si (size, 0) > 0) | |
1340 | { | |
1341 | array = gfc_start_constructor (init->ts.type, init->ts.kind, | |
1342 | &init->where); | |
1343 | ||
1344 | array->value.constructor = c = NULL; | |
1345 | for (n = 0; n < (int)mpz_get_si (size); n++) | |
1346 | { | |
1347 | if (array->value.constructor == NULL) | |
1348 | { | |
1349 | array->value.constructor = c = gfc_get_constructor (); | |
1350 | c->expr = init; | |
1351 | } | |
1352 | else | |
1353 | { | |
1354 | c->next = gfc_get_constructor (); | |
1355 | c = c->next; | |
1356 | c->expr = gfc_copy_expr (init); | |
1357 | } | |
1358 | } | |
1359 | ||
1360 | array->shape = gfc_get_shape (sym->as->rank); | |
1361 | for (n = 0; n < sym->as->rank; n++) | |
1362 | spec_dimen_size (sym->as, n, &array->shape[n]); | |
1363 | ||
1364 | init = array; | |
1365 | mpz_clear (size); | |
1366 | } | |
1367 | init->rank = sym->as->rank; | |
1368 | } | |
4ee9c684 | 1369 | |
1370 | sym->value = init; | |
3cd3c667 | 1371 | if (sym->attr.save == SAVE_NONE) |
1372 | sym->attr.save = SAVE_IMPLICIT; | |
4ee9c684 | 1373 | *initp = NULL; |
1374 | } | |
1375 | ||
1376 | return SUCCESS; | |
1377 | } | |
1378 | ||
1379 | ||
1380 | /* Function called by variable_decl() that adds a name to a structure | |
1381 | being built. */ | |
1382 | ||
f6bb8f4b | 1383 | static gfc_try |
1a9745d2 | 1384 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
1385 | gfc_array_spec **as) | |
4ee9c684 | 1386 | { |
1387 | gfc_component *c; | |
1388 | ||
1389 | /* If the current symbol is of the same derived type that we're | |
1390 | constructing, it must have the pointer attribute. */ | |
1391 | if (current_ts.type == BT_DERIVED | |
eeebe20b | 1392 | && current_ts.u.derived == gfc_current_block () |
4ee9c684 | 1393 | && current_attr.pointer == 0) |
1394 | { | |
1395 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1396 | return FAILURE; | |
1397 | } | |
1398 | ||
1a9745d2 | 1399 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
4ee9c684 | 1400 | { |
1401 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1402 | { | |
1403 | gfc_error ("Array component of structure at %C must have explicit " | |
1404 | "or deferred shape"); | |
1405 | return FAILURE; | |
1406 | } | |
1407 | } | |
1408 | ||
1409 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1410 | return FAILURE; | |
1411 | ||
1412 | c->ts = current_ts; | |
eeebe20b | 1413 | if (c->ts.type == BT_CHARACTER) |
1414 | c->ts.u.cl = cl; | |
3be2b8d5 | 1415 | c->attr = current_attr; |
4ee9c684 | 1416 | |
1417 | c->initializer = *init; | |
1418 | *init = NULL; | |
1419 | ||
1420 | c->as = *as; | |
1421 | if (c->as != NULL) | |
3be2b8d5 | 1422 | c->attr.dimension = 1; |
4ee9c684 | 1423 | *as = NULL; |
1424 | ||
a2f51d5f | 1425 | /* Should this ever get more complicated, combine with similar section |
1426 | in add_init_expr_to_sym into a separate function. */ | |
eeebe20b | 1427 | if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.u.cl |
1428 | && c->ts.u.cl->length && c->ts.u.cl->length->expr_type == EXPR_CONSTANT) | |
a2f51d5f | 1429 | { |
d1a39099 | 1430 | int len; |
1431 | ||
eeebe20b | 1432 | gcc_assert (c->ts.u.cl && c->ts.u.cl->length); |
1433 | gcc_assert (c->ts.u.cl->length->expr_type == EXPR_CONSTANT); | |
1434 | gcc_assert (c->ts.u.cl->length->ts.type == BT_INTEGER); | |
d1a39099 | 1435 | |
eeebe20b | 1436 | len = mpz_get_si (c->ts.u.cl->length->value.integer); |
a2f51d5f | 1437 | |
1438 | if (c->initializer->expr_type == EXPR_CONSTANT) | |
d1a39099 | 1439 | gfc_set_constant_character_len (len, c->initializer, -1); |
eeebe20b | 1440 | else if (mpz_cmp (c->ts.u.cl->length->value.integer, |
1441 | c->initializer->ts.u.cl->length->value.integer)) | |
a2f51d5f | 1442 | { |
d1a39099 | 1443 | bool has_ts; |
a2f51d5f | 1444 | gfc_constructor *ctor = c->initializer->value.constructor; |
d1a39099 | 1445 | |
eeebe20b | 1446 | has_ts = (c->initializer->ts.u.cl |
1447 | && c->initializer->ts.u.cl->length_from_typespec); | |
d1a39099 | 1448 | |
6e4faf80 | 1449 | if (ctor) |
d1a39099 | 1450 | { |
6e4faf80 | 1451 | int first_len; |
1452 | ||
1453 | /* Remember the length of the first element for checking | |
1454 | that all elements *in the constructor* have the same | |
1455 | length. This need not be the length of the LHS! */ | |
1456 | gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT); | |
1457 | gcc_assert (ctor->expr->ts.type == BT_CHARACTER); | |
1458 | first_len = ctor->expr->value.character.length; | |
1459 | ||
1460 | for (; ctor; ctor = ctor->next) | |
d1a39099 | 1461 | { |
6e4faf80 | 1462 | if (ctor->expr->expr_type == EXPR_CONSTANT) |
1463 | gfc_set_constant_character_len (len, ctor->expr, | |
1464 | has_ts ? -1 : first_len); | |
d1a39099 | 1465 | } |
d1a39099 | 1466 | } |
a2f51d5f | 1467 | } |
1468 | } | |
1469 | ||
4ee9c684 | 1470 | /* Check array components. */ |
3be2b8d5 | 1471 | if (!c->attr.dimension) |
2294b616 | 1472 | { |
3be2b8d5 | 1473 | if (c->attr.allocatable) |
2294b616 | 1474 | { |
1475 | gfc_error ("Allocatable component at %C must be an array"); | |
1476 | return FAILURE; | |
1477 | } | |
1478 | else | |
1479 | return SUCCESS; | |
1480 | } | |
4ee9c684 | 1481 | |
3be2b8d5 | 1482 | if (c->attr.pointer) |
4ee9c684 | 1483 | { |
1484 | if (c->as->type != AS_DEFERRED) | |
1485 | { | |
2294b616 | 1486 | gfc_error ("Pointer array component of structure at %C must have a " |
1487 | "deferred shape"); | |
1488 | return FAILURE; | |
1489 | } | |
1490 | } | |
3be2b8d5 | 1491 | else if (c->attr.allocatable) |
2294b616 | 1492 | { |
1493 | if (c->as->type != AS_DEFERRED) | |
1494 | { | |
1495 | gfc_error ("Allocatable component of structure at %C must have a " | |
1496 | "deferred shape"); | |
4ee9c684 | 1497 | return FAILURE; |
1498 | } | |
1499 | } | |
1500 | else | |
1501 | { | |
1502 | if (c->as->type != AS_EXPLICIT) | |
1503 | { | |
1a9745d2 | 1504 | gfc_error ("Array component of structure at %C must have an " |
1505 | "explicit shape"); | |
4ee9c684 | 1506 | return FAILURE; |
1507 | } | |
1508 | } | |
1509 | ||
1510 | return SUCCESS; | |
1511 | } | |
1512 | ||
1513 | ||
1514 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1515 | ||
1516 | match | |
1a9745d2 | 1517 | gfc_match_null (gfc_expr **result) |
4ee9c684 | 1518 | { |
1519 | gfc_symbol *sym; | |
1520 | gfc_expr *e; | |
1521 | match m; | |
1522 | ||
1523 | m = gfc_match (" null ( )"); | |
1524 | if (m != MATCH_YES) | |
1525 | return m; | |
1526 | ||
1527 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1528 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1529 | { | |
1530 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1531 | return MATCH_ERROR; | |
1532 | } | |
1533 | ||
1534 | gfc_intrinsic_symbol (sym); | |
1535 | ||
1536 | if (sym->attr.proc != PROC_INTRINSIC | |
950683ed | 1537 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1538 | sym->name, NULL) == FAILURE | |
1539 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
4ee9c684 | 1540 | return MATCH_ERROR; |
1541 | ||
1542 | e = gfc_get_expr (); | |
cbb9e6aa | 1543 | e->where = gfc_current_locus; |
4ee9c684 | 1544 | e->expr_type = EXPR_NULL; |
1545 | e->ts.type = BT_UNKNOWN; | |
1546 | ||
1547 | *result = e; | |
1548 | ||
1549 | return MATCH_YES; | |
1550 | } | |
1551 | ||
1552 | ||
4ee9c684 | 1553 | /* Match a variable name with an optional initializer. When this |
1554 | subroutine is called, a variable is expected to be parsed next. | |
1555 | Depending on what is happening at the moment, updates either the | |
1556 | symbol table or the current interface. */ | |
1557 | ||
1558 | static match | |
3923b69f | 1559 | variable_decl (int elem) |
4ee9c684 | 1560 | { |
1561 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1562 | gfc_expr *initializer, *char_len; | |
1563 | gfc_array_spec *as; | |
b549d2a5 | 1564 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
4ee9c684 | 1565 | gfc_charlen *cl; |
1566 | locus var_locus; | |
1567 | match m; | |
f6bb8f4b | 1568 | gfc_try t; |
b549d2a5 | 1569 | gfc_symbol *sym; |
3b6a4b41 | 1570 | locus old_locus; |
4ee9c684 | 1571 | |
1572 | initializer = NULL; | |
1573 | as = NULL; | |
b549d2a5 | 1574 | cp_as = NULL; |
3b6a4b41 | 1575 | old_locus = gfc_current_locus; |
4ee9c684 | 1576 | |
1577 | /* When we get here, we've just matched a list of attributes and | |
1578 | maybe a type and a double colon. The next thing we expect to see | |
1579 | is the name of the symbol. */ | |
1580 | m = gfc_match_name (name); | |
1581 | if (m != MATCH_YES) | |
1582 | goto cleanup; | |
1583 | ||
cbb9e6aa | 1584 | var_locus = gfc_current_locus; |
4ee9c684 | 1585 | |
1586 | /* Now we could see the optional array spec. or character length. */ | |
1587 | m = gfc_match_array_spec (&as); | |
b549d2a5 | 1588 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1589 | cp_as = gfc_copy_array_spec (as); | |
1590 | else if (m == MATCH_ERROR) | |
4ee9c684 | 1591 | goto cleanup; |
3b6a4b41 | 1592 | |
4ee9c684 | 1593 | if (m == MATCH_NO) |
1594 | as = gfc_copy_array_spec (current_as); | |
1595 | ||
1596 | char_len = NULL; | |
1597 | cl = NULL; | |
1598 | ||
1599 | if (current_ts.type == BT_CHARACTER) | |
1600 | { | |
1601 | switch (match_char_length (&char_len)) | |
1602 | { | |
1603 | case MATCH_YES: | |
d270ce52 | 1604 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
4ee9c684 | 1605 | |
1606 | cl->length = char_len; | |
1607 | break; | |
1608 | ||
3923b69f | 1609 | /* Non-constant lengths need to be copied after the first |
04b61f60 | 1610 | element. Also copy assumed lengths. */ |
4ee9c684 | 1611 | case MATCH_NO: |
04b61f60 | 1612 | if (elem > 1 |
eeebe20b | 1613 | && (current_ts.u.cl->length == NULL |
1614 | || current_ts.u.cl->length->expr_type != EXPR_CONSTANT)) | |
3923b69f | 1615 | { |
d270ce52 | 1616 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
eeebe20b | 1617 | cl->length = gfc_copy_expr (current_ts.u.cl->length); |
3923b69f | 1618 | } |
1619 | else | |
eeebe20b | 1620 | cl = current_ts.u.cl; |
3923b69f | 1621 | |
4ee9c684 | 1622 | break; |
1623 | ||
1624 | case MATCH_ERROR: | |
1625 | goto cleanup; | |
1626 | } | |
1627 | } | |
1628 | ||
b549d2a5 | 1629 | /* If this symbol has already shown up in a Cray Pointer declaration, |
f6d0e37a | 1630 | then we want to set the type & bail out. */ |
b549d2a5 | 1631 | if (gfc_option.flag_cray_pointer) |
1632 | { | |
1633 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1634 | if (sym != NULL && sym->attr.cray_pointee) | |
1635 | { | |
1636 | sym->ts.type = current_ts.type; | |
1637 | sym->ts.kind = current_ts.kind; | |
eeebe20b | 1638 | sym->ts.u.cl = cl; |
1639 | sym->ts.u.derived = current_ts.u.derived; | |
c5d33754 | 1640 | sym->ts.is_c_interop = current_ts.is_c_interop; |
1641 | sym->ts.is_iso_c = current_ts.is_iso_c; | |
b549d2a5 | 1642 | m = MATCH_YES; |
1643 | ||
1644 | /* Check to see if we have an array specification. */ | |
1645 | if (cp_as != NULL) | |
1646 | { | |
1647 | if (sym->as != NULL) | |
1648 | { | |
7698a624 | 1649 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 1650 | gfc_free_array_spec (cp_as); |
1651 | m = MATCH_ERROR; | |
1652 | goto cleanup; | |
1653 | } | |
1654 | else | |
1655 | { | |
1656 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1657 | gfc_internal_error ("Couldn't set pointee array spec."); | |
e14bee04 | 1658 | |
b549d2a5 | 1659 | /* Fix the array spec. */ |
e14bee04 | 1660 | m = gfc_mod_pointee_as (sym->as); |
b549d2a5 | 1661 | if (m == MATCH_ERROR) |
1662 | goto cleanup; | |
1663 | } | |
e14bee04 | 1664 | } |
b549d2a5 | 1665 | goto cleanup; |
1666 | } | |
1667 | else | |
1668 | { | |
1669 | gfc_free_array_spec (cp_as); | |
1670 | } | |
1671 | } | |
e14bee04 | 1672 | |
1e057e9b | 1673 | /* Procedure pointer as function result. */ |
1674 | if (gfc_current_state () == COMP_FUNCTION | |
1675 | && strcmp ("ppr@", gfc_current_block ()->name) == 0 | |
1676 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0) | |
1677 | strcpy (name, "ppr@"); | |
1678 | ||
1679 | if (gfc_current_state () == COMP_FUNCTION | |
1680 | && strcmp (name, gfc_current_block ()->name) == 0 | |
1681 | && gfc_current_block ()->result | |
1682 | && strcmp ("ppr@", gfc_current_block ()->result->name) == 0) | |
1683 | strcpy (name, "ppr@"); | |
e14bee04 | 1684 | |
4ee9c684 | 1685 | /* OK, we've successfully matched the declaration. Now put the |
1686 | symbol in the current namespace, because it might be used in the | |
fe06c0d5 | 1687 | optional initialization expression for this symbol, e.g. this is |
4ee9c684 | 1688 | perfectly legal: |
1689 | ||
1690 | integer, parameter :: i = huge(i) | |
1691 | ||
1692 | This is only true for parameters or variables of a basic type. | |
1693 | For components of derived types, it is not true, so we don't | |
1694 | create a symbol for those yet. If we fail to create the symbol, | |
1695 | bail out. */ | |
1696 | if (gfc_current_state () != COMP_DERIVED | |
1697 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1698 | { | |
b8a51d79 | 1699 | m = MATCH_ERROR; |
1700 | goto cleanup; | |
1701 | } | |
1702 | ||
60fbbf9e | 1703 | /* An interface body specifies all of the procedure's |
1704 | characteristics and these shall be consistent with those | |
1705 | specified in the procedure definition, except that the interface | |
1706 | may specify a procedure that is not pure if the procedure is | |
1707 | defined to be pure(12.3.2). */ | |
b8a51d79 | 1708 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1709 | && gfc_current_ns->proc_name |
1710 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
eeebe20b | 1711 | && current_ts.u.derived->ns != gfc_current_ns) |
c723595c | 1712 | { |
1713 | gfc_symtree *st; | |
eeebe20b | 1714 | st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.u.derived->name); |
1715 | if (!(current_ts.u.derived->attr.imported | |
c723595c | 1716 | && st != NULL |
eeebe20b | 1717 | && st->n.sym == current_ts.u.derived) |
c723595c | 1718 | && !gfc_current_ns->has_import_set) |
1719 | { | |
1720 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1721 | "interface", name); | |
1722 | m = MATCH_ERROR; | |
1723 | goto cleanup; | |
1724 | } | |
4ee9c684 | 1725 | } |
1726 | ||
1727 | /* In functions that have a RESULT variable defined, the function | |
1728 | name always refers to function calls. Therefore, the name is | |
1729 | not allowed to appear in specification statements. */ | |
1730 | if (gfc_current_state () == COMP_FUNCTION | |
1731 | && gfc_current_block () != NULL | |
1732 | && gfc_current_block ()->result != NULL | |
1733 | && gfc_current_block ()->result != gfc_current_block () | |
1734 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1735 | { | |
1736 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1737 | m = MATCH_ERROR; | |
1738 | goto cleanup; | |
1739 | } | |
1740 | ||
b4f45d02 | 1741 | /* We allow old-style initializations of the form |
1742 | integer i /2/, j(4) /3*3, 1/ | |
1743 | (if no colon has been seen). These are different from data | |
1744 | statements in that initializers are only allowed to apply to the | |
1745 | variable immediately preceding, i.e. | |
1746 | integer i, j /1, 2/ | |
1747 | is not allowed. Therefore we have to do some work manually, that | |
cca3db55 | 1748 | could otherwise be left to the matchers for DATA statements. */ |
b4f45d02 | 1749 | |
1750 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1751 | { | |
1752 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1753 | "initialization at %C") == FAILURE) | |
1754 | return MATCH_ERROR; | |
e14bee04 | 1755 | |
b4f45d02 | 1756 | return match_old_style_init (name); |
1757 | } | |
1758 | ||
4ee9c684 | 1759 | /* The double colon must be present in order to have initializers. |
1760 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1761 | if (colon_seen) | |
1762 | { | |
1763 | if (gfc_match (" =>") == MATCH_YES) | |
1764 | { | |
4ee9c684 | 1765 | if (!current_attr.pointer) |
1766 | { | |
1767 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1768 | m = MATCH_ERROR; | |
1769 | goto cleanup; | |
1770 | } | |
1771 | ||
1772 | m = gfc_match_null (&initializer); | |
1773 | if (m == MATCH_NO) | |
1774 | { | |
e4789c62 | 1775 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
4ee9c684 | 1776 | m = MATCH_ERROR; |
1777 | } | |
1778 | ||
1779 | if (gfc_pure (NULL)) | |
1780 | { | |
1a9745d2 | 1781 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1782 | "a PURE procedure"); | |
4ee9c684 | 1783 | m = MATCH_ERROR; |
1784 | } | |
1785 | ||
1786 | if (m != MATCH_YES) | |
1787 | goto cleanup; | |
1788 | ||
4ee9c684 | 1789 | } |
1790 | else if (gfc_match_char ('=') == MATCH_YES) | |
1791 | { | |
1792 | if (current_attr.pointer) | |
1793 | { | |
1a9745d2 | 1794 | gfc_error ("Pointer initialization at %C requires '=>', " |
1795 | "not '='"); | |
4ee9c684 | 1796 | m = MATCH_ERROR; |
1797 | goto cleanup; | |
1798 | } | |
1799 | ||
1800 | m = gfc_match_init_expr (&initializer); | |
1801 | if (m == MATCH_NO) | |
1802 | { | |
1803 | gfc_error ("Expected an initialization expression at %C"); | |
1804 | m = MATCH_ERROR; | |
1805 | } | |
1806 | ||
1807 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1808 | { | |
1a9745d2 | 1809 | gfc_error ("Initialization of variable at %C is not allowed in " |
1810 | "a PURE procedure"); | |
4ee9c684 | 1811 | m = MATCH_ERROR; |
1812 | } | |
1813 | ||
1814 | if (m != MATCH_YES) | |
1815 | goto cleanup; | |
1816 | } | |
8ffad0f9 | 1817 | } |
1818 | ||
2294b616 | 1819 | if (initializer != NULL && current_attr.allocatable |
1820 | && gfc_current_state () == COMP_DERIVED) | |
1821 | { | |
1a9745d2 | 1822 | gfc_error ("Initialization of allocatable component at %C is not " |
1823 | "allowed"); | |
2294b616 | 1824 | m = MATCH_ERROR; |
1825 | goto cleanup; | |
1826 | } | |
1827 | ||
d9b3f26b | 1828 | /* Add the initializer. Note that it is fine if initializer is |
4ee9c684 | 1829 | NULL here, because we sometimes also need to check if a |
1830 | declaration *must* have an initialization expression. */ | |
1831 | if (gfc_current_state () != COMP_DERIVED) | |
1832 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1833 | else | |
d9b3f26b | 1834 | { |
2294b616 | 1835 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1836 | && !current_attr.pointer && !initializer) |
d9b3f26b | 1837 | initializer = gfc_default_initializer (¤t_ts); |
1838 | t = build_struct (name, cl, &initializer, &as); | |
1839 | } | |
4ee9c684 | 1840 | |
1841 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1842 | ||
1843 | cleanup: | |
1844 | /* Free stuff up and return. */ | |
1845 | gfc_free_expr (initializer); | |
1846 | gfc_free_array_spec (as); | |
1847 | ||
1848 | return m; | |
1849 | } | |
1850 | ||
1851 | ||
d10f89ee | 1852 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
1853 | This assumes that the byte size is equal to the kind number for | |
1854 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
4ee9c684 | 1855 | |
1856 | match | |
1a9745d2 | 1857 | gfc_match_old_kind_spec (gfc_typespec *ts) |
4ee9c684 | 1858 | { |
1859 | match m; | |
3bd3b616 | 1860 | int original_kind; |
4ee9c684 | 1861 | |
1862 | if (gfc_match_char ('*') != MATCH_YES) | |
1863 | return MATCH_NO; | |
1864 | ||
3bd3b616 | 1865 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
4ee9c684 | 1866 | if (m != MATCH_YES) |
1867 | return MATCH_ERROR; | |
1868 | ||
b118a35b | 1869 | original_kind = ts->kind; |
1870 | ||
4ee9c684 | 1871 | /* Massage the kind numbers for complex types. */ |
b118a35b | 1872 | if (ts->type == BT_COMPLEX) |
1873 | { | |
1874 | if (ts->kind % 2) | |
1a9745d2 | 1875 | { |
1876 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1877 | gfc_basic_typename (ts->type), original_kind); | |
1878 | return MATCH_ERROR; | |
1879 | } | |
b118a35b | 1880 | ts->kind /= 2; |
1881 | } | |
4ee9c684 | 1882 | |
f2d4ef3b | 1883 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1884 | { |
b118a35b | 1885 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
1a9745d2 | 1886 | gfc_basic_typename (ts->type), original_kind); |
4ee9c684 | 1887 | return MATCH_ERROR; |
1888 | } | |
1889 | ||
be7f01a1 | 1890 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
1891 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1892 | return MATCH_ERROR; | |
1893 | ||
4ee9c684 | 1894 | return MATCH_YES; |
1895 | } | |
1896 | ||
1897 | ||
1898 | /* Match a kind specification. Since kinds are generally optional, we | |
1899 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1900 | string is found, then we know we have an error. */ | |
1901 | ||
1902 | match | |
67a51c8e | 1903 | gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only) |
4ee9c684 | 1904 | { |
67a51c8e | 1905 | locus where, loc; |
4ee9c684 | 1906 | gfc_expr *e; |
1907 | match m, n; | |
c632ff3d | 1908 | char c; |
4ee9c684 | 1909 | const char *msg; |
1910 | ||
1911 | m = MATCH_NO; | |
67a51c8e | 1912 | n = MATCH_YES; |
4ee9c684 | 1913 | e = NULL; |
1914 | ||
67a51c8e | 1915 | where = loc = gfc_current_locus; |
1916 | ||
1917 | if (kind_expr_only) | |
1918 | goto kind_expr; | |
4ee9c684 | 1919 | |
1920 | if (gfc_match_char ('(') == MATCH_NO) | |
1921 | return MATCH_NO; | |
1922 | ||
1923 | /* Also gobbles optional text. */ | |
1924 | if (gfc_match (" kind = ") == MATCH_YES) | |
1925 | m = MATCH_ERROR; | |
1926 | ||
67a51c8e | 1927 | loc = gfc_current_locus; |
1928 | ||
1929 | kind_expr: | |
4ee9c684 | 1930 | n = gfc_match_init_expr (&e); |
67a51c8e | 1931 | |
4ee9c684 | 1932 | if (n != MATCH_YES) |
67a51c8e | 1933 | { |
077932f9 | 1934 | if (gfc_matching_function) |
67a51c8e | 1935 | { |
077932f9 | 1936 | /* The function kind expression might include use associated or |
1937 | imported parameters and try again after the specification | |
1938 | expressions..... */ | |
67a51c8e | 1939 | if (gfc_match_char (')') != MATCH_YES) |
1940 | { | |
1941 | gfc_error ("Missing right parenthesis at %C"); | |
1942 | m = MATCH_ERROR; | |
1943 | goto no_match; | |
1944 | } | |
1945 | ||
1946 | gfc_free_expr (e); | |
67a51c8e | 1947 | gfc_undo_symbols (); |
1948 | return MATCH_YES; | |
1949 | } | |
1950 | else | |
1951 | { | |
1952 | /* ....or else, the match is real. */ | |
1953 | if (n == MATCH_NO) | |
1954 | gfc_error ("Expected initialization expression at %C"); | |
1955 | if (n != MATCH_YES) | |
1956 | return MATCH_ERROR; | |
1957 | } | |
1958 | } | |
4ee9c684 | 1959 | |
1960 | if (e->rank != 0) | |
1961 | { | |
1962 | gfc_error ("Expected scalar initialization expression at %C"); | |
1963 | m = MATCH_ERROR; | |
1964 | goto no_match; | |
1965 | } | |
1966 | ||
1967 | msg = gfc_extract_int (e, &ts->kind); | |
077932f9 | 1968 | |
4ee9c684 | 1969 | if (msg != NULL) |
1970 | { | |
1971 | gfc_error (msg); | |
1972 | m = MATCH_ERROR; | |
1973 | goto no_match; | |
1974 | } | |
1975 | ||
c5d33754 | 1976 | /* Before throwing away the expression, let's see if we had a |
1977 | C interoperable kind (and store the fact). */ | |
1978 | if (e->ts.is_c_interop == 1) | |
1979 | { | |
1980 | /* Mark this as c interoperable if being declared with one | |
1981 | of the named constants from iso_c_binding. */ | |
1982 | ts->is_c_interop = e->ts.is_iso_c; | |
1983 | ts->f90_type = e->ts.f90_type; | |
1984 | } | |
1985 | ||
4ee9c684 | 1986 | gfc_free_expr (e); |
1987 | e = NULL; | |
1988 | ||
c5d33754 | 1989 | /* Ignore errors to this point, if we've gotten here. This means |
1990 | we ignore the m=MATCH_ERROR from above. */ | |
f2d4ef3b | 1991 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1992 | { |
1993 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
1994 | gfc_basic_typename (ts->type)); | |
c632ff3d | 1995 | gfc_current_locus = where; |
1996 | return MATCH_ERROR; | |
4ee9c684 | 1997 | } |
c632ff3d | 1998 | |
209d3778 | 1999 | /* Warn if, e.g., c_int is used for a REAL variable, but not |
2000 | if, e.g., c_double is used for COMPLEX as the standard | |
2001 | explicitly says that the kind type parameter for complex and real | |
2002 | variable is the same, i.e. c_float == c_float_complex. */ | |
2003 | if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type | |
2004 | && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX) | |
2005 | || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL))) | |
ded233a6 | 2006 | gfc_warning_now ("C kind type parameter is for type %s but type at %L " |
2007 | "is %s", gfc_basic_typename (ts->f90_type), &where, | |
2008 | gfc_basic_typename (ts->type)); | |
209d3778 | 2009 | |
c632ff3d | 2010 | gfc_gobble_whitespace (); |
e0be6f02 | 2011 | if ((c = gfc_next_ascii_char ()) != ')' |
2012 | && (ts->type != BT_CHARACTER || c != ',')) | |
4ee9c684 | 2013 | { |
c632ff3d | 2014 | if (ts->type == BT_CHARACTER) |
2015 | gfc_error ("Missing right parenthesis or comma at %C"); | |
2016 | else | |
2017 | gfc_error ("Missing right parenthesis at %C"); | |
67a51c8e | 2018 | m = MATCH_ERROR; |
4ee9c684 | 2019 | } |
c5d33754 | 2020 | else |
2021 | /* All tests passed. */ | |
2022 | m = MATCH_YES; | |
4ee9c684 | 2023 | |
c5d33754 | 2024 | if(m == MATCH_ERROR) |
2025 | gfc_current_locus = where; | |
2026 | ||
2027 | /* Return what we know from the test(s). */ | |
2028 | return m; | |
4ee9c684 | 2029 | |
2030 | no_match: | |
2031 | gfc_free_expr (e); | |
cbb9e6aa | 2032 | gfc_current_locus = where; |
4ee9c684 | 2033 | return m; |
2034 | } | |
2035 | ||
2036 | ||
33399208 | 2037 | static match |
2038 | match_char_kind (int * kind, int * is_iso_c) | |
2039 | { | |
2040 | locus where; | |
2041 | gfc_expr *e; | |
2042 | match m, n; | |
2043 | const char *msg; | |
2044 | ||
2045 | m = MATCH_NO; | |
2046 | e = NULL; | |
2047 | where = gfc_current_locus; | |
2048 | ||
2049 | n = gfc_match_init_expr (&e); | |
c632ff3d | 2050 | |
077932f9 | 2051 | if (n != MATCH_YES && gfc_matching_function) |
c632ff3d | 2052 | { |
077932f9 | 2053 | /* The expression might include use-associated or imported |
2054 | parameters and try again after the specification | |
2055 | expressions. */ | |
c632ff3d | 2056 | gfc_free_expr (e); |
c632ff3d | 2057 | gfc_undo_symbols (); |
2058 | return MATCH_YES; | |
2059 | } | |
2060 | ||
33399208 | 2061 | if (n == MATCH_NO) |
2062 | gfc_error ("Expected initialization expression at %C"); | |
2063 | if (n != MATCH_YES) | |
2064 | return MATCH_ERROR; | |
2065 | ||
2066 | if (e->rank != 0) | |
2067 | { | |
2068 | gfc_error ("Expected scalar initialization expression at %C"); | |
2069 | m = MATCH_ERROR; | |
2070 | goto no_match; | |
2071 | } | |
2072 | ||
2073 | msg = gfc_extract_int (e, kind); | |
2074 | *is_iso_c = e->ts.is_iso_c; | |
2075 | if (msg != NULL) | |
2076 | { | |
2077 | gfc_error (msg); | |
2078 | m = MATCH_ERROR; | |
2079 | goto no_match; | |
2080 | } | |
2081 | ||
2082 | gfc_free_expr (e); | |
2083 | ||
2084 | /* Ignore errors to this point, if we've gotten here. This means | |
2085 | we ignore the m=MATCH_ERROR from above. */ | |
2086 | if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0) | |
2087 | { | |
2088 | gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind); | |
2089 | m = MATCH_ERROR; | |
2090 | } | |
2091 | else | |
2092 | /* All tests passed. */ | |
2093 | m = MATCH_YES; | |
2094 | ||
2095 | if (m == MATCH_ERROR) | |
2096 | gfc_current_locus = where; | |
2097 | ||
2098 | /* Return what we know from the test(s). */ | |
2099 | return m; | |
2100 | ||
2101 | no_match: | |
2102 | gfc_free_expr (e); | |
2103 | gfc_current_locus = where; | |
2104 | return m; | |
2105 | } | |
2106 | ||
10f5dcc0 | 2107 | |
4ee9c684 | 2108 | /* Match the various kind/length specifications in a CHARACTER |
2109 | declaration. We don't return MATCH_NO. */ | |
2110 | ||
10f5dcc0 | 2111 | match |
2112 | gfc_match_char_spec (gfc_typespec *ts) | |
4ee9c684 | 2113 | { |
33399208 | 2114 | int kind, seen_length, is_iso_c; |
4ee9c684 | 2115 | gfc_charlen *cl; |
2116 | gfc_expr *len; | |
2117 | match m; | |
33399208 | 2118 | |
4ee9c684 | 2119 | len = NULL; |
2120 | seen_length = 0; | |
33399208 | 2121 | kind = 0; |
2122 | is_iso_c = 0; | |
4ee9c684 | 2123 | |
2124 | /* Try the old-style specification first. */ | |
2125 | old_char_selector = 0; | |
2126 | ||
2127 | m = match_char_length (&len); | |
2128 | if (m != MATCH_NO) | |
2129 | { | |
2130 | if (m == MATCH_YES) | |
2131 | old_char_selector = 1; | |
2132 | seen_length = 1; | |
2133 | goto done; | |
2134 | } | |
2135 | ||
2136 | m = gfc_match_char ('('); | |
2137 | if (m != MATCH_YES) | |
2138 | { | |
c5d33754 | 2139 | m = MATCH_YES; /* Character without length is a single char. */ |
4ee9c684 | 2140 | goto done; |
2141 | } | |
2142 | ||
c5d33754 | 2143 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ |
4ee9c684 | 2144 | if (gfc_match (" kind =") == MATCH_YES) |
2145 | { | |
33399208 | 2146 | m = match_char_kind (&kind, &is_iso_c); |
c5d33754 | 2147 | |
4ee9c684 | 2148 | if (m == MATCH_ERROR) |
2149 | goto done; | |
2150 | if (m == MATCH_NO) | |
2151 | goto syntax; | |
2152 | ||
2153 | if (gfc_match (" , len =") == MATCH_NO) | |
2154 | goto rparen; | |
2155 | ||
2156 | m = char_len_param_value (&len); | |
2157 | if (m == MATCH_NO) | |
2158 | goto syntax; | |
2159 | if (m == MATCH_ERROR) | |
2160 | goto done; | |
2161 | seen_length = 1; | |
2162 | ||
2163 | goto rparen; | |
2164 | } | |
2165 | ||
f6d0e37a | 2166 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ |
4ee9c684 | 2167 | if (gfc_match (" len =") == MATCH_YES) |
2168 | { | |
2169 | m = char_len_param_value (&len); | |
2170 | if (m == MATCH_NO) | |
2171 | goto syntax; | |
2172 | if (m == MATCH_ERROR) | |
2173 | goto done; | |
2174 | seen_length = 1; | |
2175 | ||
2176 | if (gfc_match_char (')') == MATCH_YES) | |
2177 | goto done; | |
2178 | ||
2179 | if (gfc_match (" , kind =") != MATCH_YES) | |
2180 | goto syntax; | |
2181 | ||
33399208 | 2182 | if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR) |
2183 | goto done; | |
4ee9c684 | 2184 | |
2185 | goto rparen; | |
2186 | } | |
2187 | ||
f6d0e37a | 2188 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
4ee9c684 | 2189 | m = char_len_param_value (&len); |
2190 | if (m == MATCH_NO) | |
2191 | goto syntax; | |
2192 | if (m == MATCH_ERROR) | |
2193 | goto done; | |
2194 | seen_length = 1; | |
2195 | ||
2196 | m = gfc_match_char (')'); | |
2197 | if (m == MATCH_YES) | |
2198 | goto done; | |
2199 | ||
2200 | if (gfc_match_char (',') != MATCH_YES) | |
2201 | goto syntax; | |
2202 | ||
c5d33754 | 2203 | gfc_match (" kind ="); /* Gobble optional text. */ |
4ee9c684 | 2204 | |
33399208 | 2205 | m = match_char_kind (&kind, &is_iso_c); |
4ee9c684 | 2206 | if (m == MATCH_ERROR) |
2207 | goto done; | |
2208 | if (m == MATCH_NO) | |
2209 | goto syntax; | |
2210 | ||
2211 | rparen: | |
2212 | /* Require a right-paren at this point. */ | |
2213 | m = gfc_match_char (')'); | |
2214 | if (m == MATCH_YES) | |
2215 | goto done; | |
2216 | ||
2217 | syntax: | |
2218 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
2219 | m = MATCH_ERROR; | |
a3cbe8cc | 2220 | gfc_free_expr (len); |
2221 | return m; | |
4ee9c684 | 2222 | |
2223 | done: | |
8d39570e | 2224 | /* Deal with character functions after USE and IMPORT statements. */ |
2225 | if (gfc_matching_function) | |
077932f9 | 2226 | { |
8d39570e | 2227 | gfc_free_expr (len); |
077932f9 | 2228 | gfc_undo_symbols (); |
2229 | return MATCH_YES; | |
2230 | } | |
2231 | ||
4ee9c684 | 2232 | if (m != MATCH_YES) |
2233 | { | |
2234 | gfc_free_expr (len); | |
2235 | return m; | |
2236 | } | |
2237 | ||
2238 | /* Do some final massaging of the length values. */ | |
d270ce52 | 2239 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
4ee9c684 | 2240 | |
2241 | if (seen_length == 0) | |
2242 | cl->length = gfc_int_expr (1); | |
2243 | else | |
2fe2caa6 | 2244 | cl->length = len; |
4ee9c684 | 2245 | |
eeebe20b | 2246 | ts->u.cl = cl; |
33399208 | 2247 | ts->kind = kind == 0 ? gfc_default_character_kind : kind; |
4ee9c684 | 2248 | |
c5d33754 | 2249 | /* We have to know if it was a c interoperable kind so we can |
2250 | do accurate type checking of bind(c) procs, etc. */ | |
33399208 | 2251 | if (kind != 0) |
2252 | /* Mark this as c interoperable if being declared with one | |
2253 | of the named constants from iso_c_binding. */ | |
2254 | ts->is_c_interop = is_iso_c; | |
c5d33754 | 2255 | else if (len != NULL) |
33399208 | 2256 | /* Here, we might have parsed something such as: character(c_char) |
2257 | In this case, the parsing code above grabs the c_char when | |
2258 | looking for the length (line 1690, roughly). it's the last | |
2259 | testcase for parsing the kind params of a character variable. | |
2260 | However, it's not actually the length. this seems like it | |
2261 | could be an error. | |
2262 | To see if the user used a C interop kind, test the expr | |
2263 | of the so called length, and see if it's C interoperable. */ | |
2264 | ts->is_c_interop = len->ts.is_iso_c; | |
c5d33754 | 2265 | |
4ee9c684 | 2266 | return MATCH_YES; |
2267 | } | |
2268 | ||
2269 | ||
2270 | /* Matches a type specification. If successful, sets the ts structure | |
2271 | to the matched specification. This is necessary for FUNCTION and | |
2272 | IMPLICIT statements. | |
2273 | ||
e14bee04 | 2274 | If implicit_flag is nonzero, then we don't check for the optional |
39351103 | 2275 | kind specification. Not doing so is needed for matching an IMPLICIT |
4ee9c684 | 2276 | statement correctly. */ |
2277 | ||
67a51c8e | 2278 | match |
2279 | gfc_match_type_spec (gfc_typespec *ts, int implicit_flag) | |
4ee9c684 | 2280 | { |
2281 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2282 | gfc_symbol *sym; | |
2283 | match m; | |
e0be6f02 | 2284 | char c; |
077932f9 | 2285 | bool seen_deferred_kind; |
4ee9c684 | 2286 | |
077932f9 | 2287 | /* A belt and braces check that the typespec is correctly being treated |
2288 | as a deferred characteristic association. */ | |
2289 | seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION) | |
8d39570e | 2290 | && (gfc_current_block ()->result->ts.kind == -1) |
2291 | && (ts->kind == -1); | |
4ee9c684 | 2292 | gfc_clear_ts (ts); |
077932f9 | 2293 | if (seen_deferred_kind) |
2294 | ts->kind = -1; | |
4ee9c684 | 2295 | |
c5d33754 | 2296 | /* Clear the current binding label, in case one is given. */ |
2297 | curr_binding_label[0] = '\0'; | |
2298 | ||
25b29122 | 2299 | if (gfc_match (" byte") == MATCH_YES) |
2300 | { | |
2c89e2a0 | 2301 | if (gfc_notify_std (GFC_STD_GNU, "Extension: BYTE type at %C") |
25b29122 | 2302 | == FAILURE) |
2303 | return MATCH_ERROR; | |
2304 | ||
2305 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
2306 | { | |
2307 | gfc_error ("BYTE type used at %C " | |
2308 | "is not available on the target machine"); | |
2309 | return MATCH_ERROR; | |
2310 | } | |
e14bee04 | 2311 | |
25b29122 | 2312 | ts->type = BT_INTEGER; |
2313 | ts->kind = 1; | |
2314 | return MATCH_YES; | |
2315 | } | |
2316 | ||
4ee9c684 | 2317 | if (gfc_match (" integer") == MATCH_YES) |
2318 | { | |
2319 | ts->type = BT_INTEGER; | |
b8a891cb | 2320 | ts->kind = gfc_default_integer_kind; |
4ee9c684 | 2321 | goto get_kind; |
2322 | } | |
2323 | ||
2324 | if (gfc_match (" character") == MATCH_YES) | |
2325 | { | |
2326 | ts->type = BT_CHARACTER; | |
39351103 | 2327 | if (implicit_flag == 0) |
10f5dcc0 | 2328 | return gfc_match_char_spec (ts); |
39351103 | 2329 | else |
2330 | return MATCH_YES; | |
4ee9c684 | 2331 | } |
2332 | ||
2333 | if (gfc_match (" real") == MATCH_YES) | |
2334 | { | |
2335 | ts->type = BT_REAL; | |
b8a891cb | 2336 | ts->kind = gfc_default_real_kind; |
4ee9c684 | 2337 | goto get_kind; |
2338 | } | |
2339 | ||
2340 | if (gfc_match (" double precision") == MATCH_YES) | |
2341 | { | |
2342 | ts->type = BT_REAL; | |
b8a891cb | 2343 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2344 | return MATCH_YES; |
2345 | } | |
2346 | ||
2347 | if (gfc_match (" complex") == MATCH_YES) | |
2348 | { | |
2349 | ts->type = BT_COMPLEX; | |
b8a891cb | 2350 | ts->kind = gfc_default_complex_kind; |
4ee9c684 | 2351 | goto get_kind; |
2352 | } | |
2353 | ||
2354 | if (gfc_match (" double complex") == MATCH_YES) | |
2355 | { | |
be7f01a1 | 2356 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
2357 | "conform to the Fortran 95 standard") == FAILURE) | |
2358 | return MATCH_ERROR; | |
2359 | ||
4ee9c684 | 2360 | ts->type = BT_COMPLEX; |
b8a891cb | 2361 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2362 | return MATCH_YES; |
2363 | } | |
2364 | ||
2365 | if (gfc_match (" logical") == MATCH_YES) | |
2366 | { | |
2367 | ts->type = BT_LOGICAL; | |
b8a891cb | 2368 | ts->kind = gfc_default_logical_kind; |
4ee9c684 | 2369 | goto get_kind; |
2370 | } | |
2371 | ||
2372 | m = gfc_match (" type ( %n )", name); | |
2373 | if (m != MATCH_YES) | |
8ca7f89c | 2374 | { |
2375 | m = gfc_match (" class ( %n )", name); | |
2376 | if (m != MATCH_YES) | |
2377 | return m; | |
2378 | ts->is_class = 1; | |
2379 | ||
2380 | /* TODO: Implement Polymorphism. */ | |
2381 | gfc_warning ("Polymorphic entities are not yet implemented. " | |
2382 | "CLASS will be treated like TYPE at %C"); | |
2383 | } | |
4ee9c684 | 2384 | |
077932f9 | 2385 | ts->type = BT_DERIVED; |
2386 | ||
2387 | /* Defer association of the derived type until the end of the | |
2388 | specification block. However, if the derived type can be | |
2389 | found, add it to the typespec. */ | |
2390 | if (gfc_matching_function) | |
67a51c8e | 2391 | { |
eeebe20b | 2392 | ts->u.derived = NULL; |
077932f9 | 2393 | if (gfc_current_state () != COMP_INTERFACE |
2394 | && !gfc_find_symbol (name, NULL, 1, &sym) && sym) | |
eeebe20b | 2395 | ts->u.derived = sym; |
67a51c8e | 2396 | return MATCH_YES; |
2397 | } | |
2398 | ||
2399 | /* Search for the name but allow the components to be defined later. If | |
2400 | type = -1, this typespec has been seen in a function declaration but | |
077932f9 | 2401 | the type could not be accessed at that point. */ |
2402 | sym = NULL; | |
67a51c8e | 2403 | if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym)) |
4ee9c684 | 2404 | { |
2405 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2406 | return MATCH_ERROR; | |
2407 | } | |
67a51c8e | 2408 | else if (ts->kind == -1) |
2409 | { | |
077932f9 | 2410 | int iface = gfc_state_stack->previous->state != COMP_INTERFACE |
2411 | || gfc_current_ns->has_import_set; | |
2412 | if (gfc_find_symbol (name, NULL, iface, &sym)) | |
67a51c8e | 2413 | { |
2414 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2415 | return MATCH_ERROR; | |
2416 | } | |
2417 | ||
077932f9 | 2418 | ts->kind = 0; |
67a51c8e | 2419 | if (sym == NULL) |
2420 | return MATCH_NO; | |
2421 | } | |
4ee9c684 | 2422 | |
2423 | if (sym->attr.flavor != FL_DERIVED | |
950683ed | 2424 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 2425 | return MATCH_ERROR; |
2426 | ||
077932f9 | 2427 | gfc_set_sym_referenced (sym); |
eeebe20b | 2428 | ts->u.derived = sym; |
4ee9c684 | 2429 | |
2430 | return MATCH_YES; | |
2431 | ||
2432 | get_kind: | |
2433 | /* For all types except double, derived and character, look for an | |
2434 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
39351103 | 2435 | if (implicit_flag == 1) |
4ee9c684 | 2436 | return MATCH_YES; |
2437 | ||
18f3698a | 2438 | if (gfc_current_form == FORM_FREE) |
2439 | { | |
2c89e2a0 | 2440 | c = gfc_peek_ascii_char (); |
2441 | if (!gfc_is_whitespace (c) && c != '*' && c != '(' | |
1a9745d2 | 2442 | && c != ':' && c != ',') |
18f3698a | 2443 | return MATCH_NO; |
2444 | } | |
2445 | ||
67a51c8e | 2446 | m = gfc_match_kind_spec (ts, false); |
4ee9c684 | 2447 | if (m == MATCH_NO && ts->type != BT_CHARACTER) |
2448 | m = gfc_match_old_kind_spec (ts); | |
2449 | ||
077932f9 | 2450 | /* Defer association of the KIND expression of function results |
2451 | until after USE and IMPORT statements. */ | |
2452 | if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ()) | |
2453 | || gfc_matching_function) | |
2454 | return MATCH_YES; | |
2455 | ||
4ee9c684 | 2456 | if (m == MATCH_NO) |
2457 | m = MATCH_YES; /* No kind specifier found. */ | |
2458 | ||
2459 | return m; | |
2460 | } | |
2461 | ||
2462 | ||
39351103 | 2463 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
2464 | already matched in parse.c, or we would not end up here in the | |
2465 | first place. So the only thing we need to check, is if there is | |
2466 | trailing garbage. If not, the match is successful. */ | |
2467 | ||
2468 | match | |
2469 | gfc_match_implicit_none (void) | |
2470 | { | |
39351103 | 2471 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
2472 | } | |
2473 | ||
2474 | ||
2475 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
2476 | ||
2477 | static match | |
b70528c7 | 2478 | match_implicit_range (void) |
39351103 | 2479 | { |
e0be6f02 | 2480 | char c, c1, c2; |
2481 | int inner; | |
39351103 | 2482 | locus cur_loc; |
2483 | ||
2484 | cur_loc = gfc_current_locus; | |
2485 | ||
2486 | gfc_gobble_whitespace (); | |
e0be6f02 | 2487 | c = gfc_next_ascii_char (); |
39351103 | 2488 | if (c != '(') |
2489 | { | |
2490 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
2491 | goto bad; | |
2492 | } | |
2493 | ||
2494 | inner = 1; | |
2495 | while (inner) | |
2496 | { | |
2497 | gfc_gobble_whitespace (); | |
e0be6f02 | 2498 | c1 = gfc_next_ascii_char (); |
39351103 | 2499 | if (!ISALPHA (c1)) |
2500 | goto bad; | |
2501 | ||
2502 | gfc_gobble_whitespace (); | |
e0be6f02 | 2503 | c = gfc_next_ascii_char (); |
39351103 | 2504 | |
2505 | switch (c) | |
2506 | { | |
2507 | case ')': | |
f6d0e37a | 2508 | inner = 0; /* Fall through. */ |
39351103 | 2509 | |
2510 | case ',': | |
2511 | c2 = c1; | |
2512 | break; | |
2513 | ||
2514 | case '-': | |
2515 | gfc_gobble_whitespace (); | |
e0be6f02 | 2516 | c2 = gfc_next_ascii_char (); |
39351103 | 2517 | if (!ISALPHA (c2)) |
2518 | goto bad; | |
2519 | ||
2520 | gfc_gobble_whitespace (); | |
e0be6f02 | 2521 | c = gfc_next_ascii_char (); |
39351103 | 2522 | |
2523 | if ((c != ',') && (c != ')')) | |
2524 | goto bad; | |
2525 | if (c == ')') | |
2526 | inner = 0; | |
2527 | ||
2528 | break; | |
2529 | ||
2530 | default: | |
2531 | goto bad; | |
2532 | } | |
2533 | ||
2534 | if (c1 > c2) | |
2535 | { | |
2536 | gfc_error ("Letters must be in alphabetic order in " | |
2537 | "IMPLICIT statement at %C"); | |
2538 | goto bad; | |
2539 | } | |
2540 | ||
2541 | /* See if we can add the newly matched range to the pending | |
1a9745d2 | 2542 | implicits from this IMPLICIT statement. We do not check for |
2543 | conflicts with whatever earlier IMPLICIT statements may have | |
2544 | set. This is done when we've successfully finished matching | |
2545 | the current one. */ | |
b70528c7 | 2546 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
39351103 | 2547 | goto bad; |
2548 | } | |
2549 | ||
2550 | return MATCH_YES; | |
2551 | ||
2552 | bad: | |
2553 | gfc_syntax_error (ST_IMPLICIT); | |
2554 | ||
2555 | gfc_current_locus = cur_loc; | |
2556 | return MATCH_ERROR; | |
2557 | } | |
2558 | ||
2559 | ||
2560 | /* Match an IMPLICIT statement, storing the types for | |
2561 | gfc_set_implicit() if the statement is accepted by the parser. | |
2562 | There is a strange looking, but legal syntactic construction | |
2563 | possible. It looks like: | |
2564 | ||
2565 | IMPLICIT INTEGER (a-b) (c-d) | |
2566 | ||
2567 | This is legal if "a-b" is a constant expression that happens to | |
2568 | equal one of the legal kinds for integers. The real problem | |
2569 | happens with an implicit specification that looks like: | |
2570 | ||
2571 | IMPLICIT INTEGER (a-b) | |
2572 | ||
2573 | In this case, a typespec matcher that is "greedy" (as most of the | |
2574 | matchers are) gobbles the character range as a kindspec, leaving | |
2575 | nothing left. We therefore have to go a bit more slowly in the | |
2576 | matching process by inhibiting the kindspec checking during | |
2577 | typespec matching and checking for a kind later. */ | |
2578 | ||
2579 | match | |
2580 | gfc_match_implicit (void) | |
2581 | { | |
2582 | gfc_typespec ts; | |
2583 | locus cur_loc; | |
e0be6f02 | 2584 | char c; |
39351103 | 2585 | match m; |
2586 | ||
52179f31 | 2587 | gfc_clear_ts (&ts); |
2588 | ||
39351103 | 2589 | /* We don't allow empty implicit statements. */ |
2590 | if (gfc_match_eos () == MATCH_YES) | |
2591 | { | |
2592 | gfc_error ("Empty IMPLICIT statement at %C"); | |
2593 | return MATCH_ERROR; | |
2594 | } | |
2595 | ||
39351103 | 2596 | do |
2597 | { | |
b70528c7 | 2598 | /* First cleanup. */ |
2599 | gfc_clear_new_implicit (); | |
2600 | ||
39351103 | 2601 | /* A basic type is mandatory here. */ |
67a51c8e | 2602 | m = gfc_match_type_spec (&ts, 1); |
39351103 | 2603 | if (m == MATCH_ERROR) |
2604 | goto error; | |
2605 | if (m == MATCH_NO) | |
2606 | goto syntax; | |
2607 | ||
2608 | cur_loc = gfc_current_locus; | |
b70528c7 | 2609 | m = match_implicit_range (); |
39351103 | 2610 | |
2611 | if (m == MATCH_YES) | |
2612 | { | |
b70528c7 | 2613 | /* We may have <TYPE> (<RANGE>). */ |
39351103 | 2614 | gfc_gobble_whitespace (); |
e0be6f02 | 2615 | c = gfc_next_ascii_char (); |
39351103 | 2616 | if ((c == '\n') || (c == ',')) |
b70528c7 | 2617 | { |
2618 | /* Check for CHARACTER with no length parameter. */ | |
eeebe20b | 2619 | if (ts.type == BT_CHARACTER && !ts.u.cl) |
b70528c7 | 2620 | { |
b8a891cb | 2621 | ts.kind = gfc_default_character_kind; |
d270ce52 | 2622 | ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
eeebe20b | 2623 | ts.u.cl->length = gfc_int_expr (1); |
b70528c7 | 2624 | } |
2625 | ||
2626 | /* Record the Successful match. */ | |
2627 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2628 | return MATCH_ERROR; | |
2629 | continue; | |
2630 | } | |
39351103 | 2631 | |
2632 | gfc_current_locus = cur_loc; | |
2633 | } | |
2634 | ||
b70528c7 | 2635 | /* Discard the (incorrectly) matched range. */ |
2636 | gfc_clear_new_implicit (); | |
2637 | ||
2638 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
2639 | if (ts.type == BT_CHARACTER) | |
10f5dcc0 | 2640 | m = gfc_match_char_spec (&ts); |
b70528c7 | 2641 | else |
39351103 | 2642 | { |
67a51c8e | 2643 | m = gfc_match_kind_spec (&ts, false); |
39351103 | 2644 | if (m == MATCH_NO) |
b70528c7 | 2645 | { |
2646 | m = gfc_match_old_kind_spec (&ts); | |
2647 | if (m == MATCH_ERROR) | |
2648 | goto error; | |
2649 | if (m == MATCH_NO) | |
2650 | goto syntax; | |
2651 | } | |
39351103 | 2652 | } |
b70528c7 | 2653 | if (m == MATCH_ERROR) |
2654 | goto error; | |
39351103 | 2655 | |
b70528c7 | 2656 | m = match_implicit_range (); |
39351103 | 2657 | if (m == MATCH_ERROR) |
2658 | goto error; | |
2659 | if (m == MATCH_NO) | |
2660 | goto syntax; | |
2661 | ||
2662 | gfc_gobble_whitespace (); | |
e0be6f02 | 2663 | c = gfc_next_ascii_char (); |
39351103 | 2664 | if ((c != '\n') && (c != ',')) |
2665 | goto syntax; | |
2666 | ||
b70528c7 | 2667 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2668 | return MATCH_ERROR; | |
39351103 | 2669 | } |
2670 | while (c == ','); | |
2671 | ||
b70528c7 | 2672 | return MATCH_YES; |
39351103 | 2673 | |
2674 | syntax: | |
2675 | gfc_syntax_error (ST_IMPLICIT); | |
2676 | ||
2677 | error: | |
2678 | return MATCH_ERROR; | |
2679 | } | |
2680 | ||
f6d0e37a | 2681 | |
d67fc9ae | 2682 | match |
2683 | gfc_match_import (void) | |
2684 | { | |
2685 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2686 | match m; | |
2687 | gfc_symbol *sym; | |
2688 | gfc_symtree *st; | |
2689 | ||
f6d0e37a | 2690 | if (gfc_current_ns->proc_name == NULL |
2691 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
d67fc9ae | 2692 | { |
2693 | gfc_error ("IMPORT statement at %C only permitted in " | |
2694 | "an INTERFACE body"); | |
2695 | return MATCH_ERROR; | |
2696 | } | |
2697 | ||
1a9745d2 | 2698 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
d67fc9ae | 2699 | == FAILURE) |
2700 | return MATCH_ERROR; | |
2701 | ||
2702 | if (gfc_match_eos () == MATCH_YES) | |
2703 | { | |
2704 | /* All host variables should be imported. */ | |
2705 | gfc_current_ns->has_import_set = 1; | |
2706 | return MATCH_YES; | |
2707 | } | |
2708 | ||
2709 | if (gfc_match (" ::") == MATCH_YES) | |
2710 | { | |
2711 | if (gfc_match_eos () == MATCH_YES) | |
1a9745d2 | 2712 | { |
2713 | gfc_error ("Expecting list of named entities at %C"); | |
2714 | return MATCH_ERROR; | |
2715 | } | |
d67fc9ae | 2716 | } |
2717 | ||
2718 | for(;;) | |
2719 | { | |
2720 | m = gfc_match (" %n", name); | |
2721 | switch (m) | |
2722 | { | |
2723 | case MATCH_YES: | |
096d4ad9 | 2724 | if (gfc_current_ns->parent != NULL |
f6d0e37a | 2725 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
096d4ad9 | 2726 | { |
2727 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2728 | return MATCH_ERROR; | |
2729 | } | |
2730 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
f6d0e37a | 2731 | && gfc_find_symbol (name, |
2732 | gfc_current_ns->proc_name->ns->parent, | |
2733 | 1, &sym)) | |
1a9745d2 | 2734 | { |
2735 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2736 | return MATCH_ERROR; | |
2737 | } | |
2738 | ||
2739 | if (sym == NULL) | |
2740 | { | |
2741 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2742 | "at %C - does not exist.", name); | |
2743 | return MATCH_ERROR; | |
2744 | } | |
2745 | ||
e14bee04 | 2746 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) |
1a9745d2 | 2747 | { |
2748 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2749 | "at %C.", name); | |
2750 | goto next_item; | |
2751 | } | |
2752 | ||
a15d1caf | 2753 | st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name); |
1a9745d2 | 2754 | st->n.sym = sym; |
2755 | sym->refs++; | |
c723595c | 2756 | sym->attr.imported = 1; |
d67fc9ae | 2757 | |
2758 | goto next_item; | |
2759 | ||
2760 | case MATCH_NO: | |
2761 | break; | |
2762 | ||
2763 | case MATCH_ERROR: | |
2764 | return MATCH_ERROR; | |
2765 | } | |
2766 | ||
2767 | next_item: | |
2768 | if (gfc_match_eos () == MATCH_YES) | |
2769 | break; | |
2770 | if (gfc_match_char (',') != MATCH_YES) | |
2771 | goto syntax; | |
2772 | } | |
2773 | ||
2774 | return MATCH_YES; | |
2775 | ||
2776 | syntax: | |
2777 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2778 | return MATCH_ERROR; | |
2779 | } | |
39351103 | 2780 | |
f6d0e37a | 2781 | |
c72e5f7e | 2782 | /* A minimal implementation of gfc_match without whitespace, escape |
2783 | characters or variable arguments. Returns true if the next | |
2784 | characters match the TARGET template exactly. */ | |
2785 | ||
2786 | static bool | |
2787 | match_string_p (const char *target) | |
2788 | { | |
2789 | const char *p; | |
2790 | ||
2791 | for (p = target; *p; p++) | |
e0be6f02 | 2792 | if ((char) gfc_next_ascii_char () != *p) |
c72e5f7e | 2793 | return false; |
2794 | return true; | |
2795 | } | |
2796 | ||
4ee9c684 | 2797 | /* Matches an attribute specification including array specs. If |
2798 | successful, leaves the variables current_attr and current_as | |
2799 | holding the specification. Also sets the colon_seen variable for | |
2800 | later use by matchers associated with initializations. | |
2801 | ||
2802 | This subroutine is a little tricky in the sense that we don't know | |
2803 | if we really have an attr-spec until we hit the double colon. | |
2804 | Until that time, we can only return MATCH_NO. This forces us to | |
2805 | check for duplicate specification at this level. */ | |
2806 | ||
2807 | static match | |
2808 | match_attr_spec (void) | |
2809 | { | |
4ee9c684 | 2810 | /* Modifiers that can exist in a type statement. */ |
2811 | typedef enum | |
2812 | { GFC_DECL_BEGIN = 0, | |
2813 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
2814 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
3ea52af3 | 2815 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
2816 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
c72e5f7e | 2817 | DECL_IS_BIND_C, DECL_NONE, |
4ee9c684 | 2818 | GFC_DECL_END /* Sentinel */ |
2819 | } | |
2820 | decl_types; | |
2821 | ||
2822 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
2823 | #define NUM_DECL GFC_DECL_END | |
2824 | ||
4ee9c684 | 2825 | locus start, seen_at[NUM_DECL]; |
2826 | int seen[NUM_DECL]; | |
9f1b7d17 | 2827 | unsigned int d; |
4ee9c684 | 2828 | const char *attr; |
2829 | match m; | |
f6bb8f4b | 2830 | gfc_try t; |
4ee9c684 | 2831 | |
2832 | gfc_clear_attr (¤t_attr); | |
cbb9e6aa | 2833 | start = gfc_current_locus; |
4ee9c684 | 2834 | |
2835 | current_as = NULL; | |
2836 | colon_seen = 0; | |
2837 | ||
2838 | /* See if we get all of the keywords up to the final double colon. */ | |
2839 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2840 | seen[d] = 0; | |
2841 | ||
2842 | for (;;) | |
2843 | { | |
e0be6f02 | 2844 | char ch; |
c5d33754 | 2845 | |
c72e5f7e | 2846 | d = DECL_NONE; |
2847 | gfc_gobble_whitespace (); | |
2848 | ||
e0be6f02 | 2849 | ch = gfc_next_ascii_char (); |
c72e5f7e | 2850 | if (ch == ':') |
2851 | { | |
2852 | /* This is the successful exit condition for the loop. */ | |
e0be6f02 | 2853 | if (gfc_next_ascii_char () == ':') |
c72e5f7e | 2854 | break; |
2855 | } | |
2856 | else if (ch == ',') | |
c5d33754 | 2857 | { |
c5d33754 | 2858 | gfc_gobble_whitespace (); |
e0be6f02 | 2859 | switch (gfc_peek_ascii_char ()) |
c5d33754 | 2860 | { |
c72e5f7e | 2861 | case 'a': |
2862 | if (match_string_p ("allocatable")) | |
2863 | d = DECL_ALLOCATABLE; | |
2864 | break; | |
2865 | ||
2866 | case 'b': | |
c5d33754 | 2867 | /* Try and match the bind(c). */ |
75ae7f6c | 2868 | m = gfc_match_bind_c (NULL, true); |
5cf92482 | 2869 | if (m == MATCH_YES) |
c5d33754 | 2870 | d = DECL_IS_BIND_C; |
5cf92482 | 2871 | else if (m == MATCH_ERROR) |
2872 | goto cleanup; | |
c72e5f7e | 2873 | break; |
2874 | ||
2875 | case 'd': | |
2876 | if (match_string_p ("dimension")) | |
2877 | d = DECL_DIMENSION; | |
2878 | break; | |
2879 | ||
2880 | case 'e': | |
2881 | if (match_string_p ("external")) | |
2882 | d = DECL_EXTERNAL; | |
2883 | break; | |
2884 | ||
2885 | case 'i': | |
2886 | if (match_string_p ("int")) | |
2887 | { | |
e0be6f02 | 2888 | ch = gfc_next_ascii_char (); |
c72e5f7e | 2889 | if (ch == 'e') |
2890 | { | |
2891 | if (match_string_p ("nt")) | |
2892 | { | |
2893 | /* Matched "intent". */ | |
2894 | /* TODO: Call match_intent_spec from here. */ | |
2895 | if (gfc_match (" ( in out )") == MATCH_YES) | |
2896 | d = DECL_INOUT; | |
2897 | else if (gfc_match (" ( in )") == MATCH_YES) | |
2898 | d = DECL_IN; | |
2899 | else if (gfc_match (" ( out )") == MATCH_YES) | |
2900 | d = DECL_OUT; | |
2901 | } | |
2902 | } | |
2903 | else if (ch == 'r') | |
2904 | { | |
2905 | if (match_string_p ("insic")) | |
2906 | { | |
2907 | /* Matched "intrinsic". */ | |
2908 | d = DECL_INTRINSIC; | |
2909 | } | |
2910 | } | |
2911 | } | |
2912 | break; | |
2913 | ||
2914 | case 'o': | |
2915 | if (match_string_p ("optional")) | |
2916 | d = DECL_OPTIONAL; | |
2917 | break; | |
2918 | ||
2919 | case 'p': | |
e0be6f02 | 2920 | gfc_next_ascii_char (); |
2921 | switch (gfc_next_ascii_char ()) | |
c72e5f7e | 2922 | { |
2923 | case 'a': | |
2924 | if (match_string_p ("rameter")) | |
2925 | { | |
2926 | /* Matched "parameter". */ | |
2927 | d = DECL_PARAMETER; | |
2928 | } | |
2929 | break; | |
2930 | ||
2931 | case 'o': | |
2932 | if (match_string_p ("inter")) | |
2933 | { | |
2934 | /* Matched "pointer". */ | |
2935 | d = DECL_POINTER; | |
2936 | } | |
2937 | break; | |
2938 | ||
2939 | case 'r': | |
e0be6f02 | 2940 | ch = gfc_next_ascii_char (); |
c72e5f7e | 2941 | if (ch == 'i') |
2942 | { | |
2943 | if (match_string_p ("vate")) | |
2944 | { | |
2945 | /* Matched "private". */ | |
2946 | d = DECL_PRIVATE; | |
2947 | } | |
2948 | } | |
2949 | else if (ch == 'o') | |
2950 | { | |
2951 | if (match_string_p ("tected")) | |
2952 | { | |
2953 | /* Matched "protected". */ | |
2954 | d = DECL_PROTECTED; | |
2955 | } | |
2956 | } | |
2957 | break; | |
2958 | ||
2959 | case 'u': | |
2960 | if (match_string_p ("blic")) | |
2961 | { | |
2962 | /* Matched "public". */ | |
2963 | d = DECL_PUBLIC; | |
2964 | } | |
2965 | break; | |
2966 | } | |
2967 | break; | |
2968 | ||
2969 | case 's': | |
2970 | if (match_string_p ("save")) | |
2971 | d = DECL_SAVE; | |
2972 | break; | |
2973 | ||
2974 | case 't': | |
2975 | if (match_string_p ("target")) | |
2976 | d = DECL_TARGET; | |
2977 | break; | |
2978 | ||
2979 | case 'v': | |
e0be6f02 | 2980 | gfc_next_ascii_char (); |
2981 | ch = gfc_next_ascii_char (); | |
c72e5f7e | 2982 | if (ch == 'a') |
2983 | { | |
2984 | if (match_string_p ("lue")) | |
2985 | { | |
2986 | /* Matched "value". */ | |
2987 | d = DECL_VALUE; | |
2988 | } | |
2989 | } | |
2990 | else if (ch == 'o') | |
2991 | { | |
2992 | if (match_string_p ("latile")) | |
2993 | { | |
2994 | /* Matched "volatile". */ | |
2995 | d = DECL_VOLATILE; | |
2996 | } | |
2997 | } | |
2998 | break; | |
c5d33754 | 2999 | } |
3000 | } | |
f3f9b222 | 3001 | |
c72e5f7e | 3002 | /* No double colon and no recognizable decl_type, so assume that |
3003 | we've been looking at something else the whole time. */ | |
3004 | if (d == DECL_NONE) | |
3005 | { | |
3006 | m = MATCH_NO; | |
3007 | goto cleanup; | |
3008 | } | |
e14bee04 | 3009 | |
7e221851 | 3010 | /* Check to make sure any parens are paired up correctly. */ |
3011 | if (gfc_match_parens () == MATCH_ERROR) | |
3012 | { | |
3013 | m = MATCH_ERROR; | |
3014 | goto cleanup; | |
3015 | } | |
3016 | ||
4ee9c684 | 3017 | seen[d]++; |
cbb9e6aa | 3018 | seen_at[d] = gfc_current_locus; |
4ee9c684 | 3019 | |
3020 | if (d == DECL_DIMENSION) | |
3021 | { | |
3022 | m = gfc_match_array_spec (¤t_as); | |
3023 | ||
3024 | if (m == MATCH_NO) | |
3025 | { | |
3026 | gfc_error ("Missing dimension specification at %C"); | |
3027 | m = MATCH_ERROR; | |
3028 | } | |
3029 | ||
3030 | if (m == MATCH_ERROR) | |
3031 | goto cleanup; | |
3032 | } | |
3033 | } | |
3034 | ||
4ee9c684 | 3035 | /* Since we've seen a double colon, we have to be looking at an |
3036 | attr-spec. This means that we can now issue errors. */ | |
3037 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3038 | if (seen[d] > 1) | |
3039 | { | |
3040 | switch (d) | |
3041 | { | |
3042 | case DECL_ALLOCATABLE: | |
3043 | attr = "ALLOCATABLE"; | |
3044 | break; | |
3045 | case DECL_DIMENSION: | |
3046 | attr = "DIMENSION"; | |
3047 | break; | |
3048 | case DECL_EXTERNAL: | |
3049 | attr = "EXTERNAL"; | |
3050 | break; | |
3051 | case DECL_IN: | |
3052 | attr = "INTENT (IN)"; | |
3053 | break; | |
3054 | case DECL_OUT: | |
3055 | attr = "INTENT (OUT)"; | |
3056 | break; | |
3057 | case DECL_INOUT: | |
3058 | attr = "INTENT (IN OUT)"; | |
3059 | break; | |
3060 | case DECL_INTRINSIC: | |
3061 | attr = "INTRINSIC"; | |
3062 | break; | |
3063 | case DECL_OPTIONAL: | |
3064 | attr = "OPTIONAL"; | |
3065 | break; | |
3066 | case DECL_PARAMETER: | |
3067 | attr = "PARAMETER"; | |
3068 | break; | |
3069 | case DECL_POINTER: | |
3070 | attr = "POINTER"; | |
3071 | break; | |
3ea52af3 | 3072 | case DECL_PROTECTED: |
3073 | attr = "PROTECTED"; | |
3074 | break; | |
4ee9c684 | 3075 | case DECL_PRIVATE: |
3076 | attr = "PRIVATE"; | |
3077 | break; | |
3078 | case DECL_PUBLIC: | |
3079 | attr = "PUBLIC"; | |
3080 | break; | |
3081 | case DECL_SAVE: | |
3082 | attr = "SAVE"; | |
3083 | break; | |
3084 | case DECL_TARGET: | |
3085 | attr = "TARGET"; | |
3086 | break; | |
c5d33754 | 3087 | case DECL_IS_BIND_C: |
3088 | attr = "IS_BIND_C"; | |
3089 | break; | |
3090 | case DECL_VALUE: | |
3091 | attr = "VALUE"; | |
3092 | break; | |
ef814c81 | 3093 | case DECL_VOLATILE: |
3094 | attr = "VOLATILE"; | |
3095 | break; | |
4ee9c684 | 3096 | default: |
f6d0e37a | 3097 | attr = NULL; /* This shouldn't happen. */ |
4ee9c684 | 3098 | } |
3099 | ||
3100 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
3101 | m = MATCH_ERROR; | |
3102 | goto cleanup; | |
3103 | } | |
3104 | ||
3105 | /* Now that we've dealt with duplicate attributes, add the attributes | |
3106 | to the current attribute. */ | |
3107 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3108 | { | |
3109 | if (seen[d] == 0) | |
3110 | continue; | |
3111 | ||
3112 | if (gfc_current_state () == COMP_DERIVED | |
3113 | && d != DECL_DIMENSION && d != DECL_POINTER | |
c72e5f7e | 3114 | && d != DECL_PRIVATE && d != DECL_PUBLIC |
3115 | && d != DECL_NONE) | |
4ee9c684 | 3116 | { |
2294b616 | 3117 | if (d == DECL_ALLOCATABLE) |
3118 | { | |
1a9745d2 | 3119 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
3120 | "attribute at %C in a TYPE definition") | |
e14bee04 | 3121 | == FAILURE) |
2294b616 | 3122 | { |
3123 | m = MATCH_ERROR; | |
3124 | goto cleanup; | |
3125 | } | |
1a9745d2 | 3126 | } |
3127 | else | |
2294b616 | 3128 | { |
3129 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
e14bee04 | 3130 | &seen_at[d]); |
2294b616 | 3131 | m = MATCH_ERROR; |
3132 | goto cleanup; | |
3133 | } | |
4ee9c684 | 3134 | } |
3135 | ||
ea13b9b7 | 3136 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
1a9745d2 | 3137 | && gfc_current_state () != COMP_MODULE) |
ea13b9b7 | 3138 | { |
3139 | if (d == DECL_PRIVATE) | |
3140 | attr = "PRIVATE"; | |
3141 | else | |
3142 | attr = "PUBLIC"; | |
e14bee04 | 3143 | if (gfc_current_state () == COMP_DERIVED |
3144 | && gfc_state_stack->previous | |
3145 | && gfc_state_stack->previous->state == COMP_MODULE) | |
3146 | { | |
3147 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s " | |
3148 | "at %L in a TYPE definition", attr, | |
3149 | &seen_at[d]) | |
3150 | == FAILURE) | |
3151 | { | |
3152 | m = MATCH_ERROR; | |
3153 | goto cleanup; | |
3154 | } | |
3155 | } | |
3156 | else | |
3157 | { | |
3158 | gfc_error ("%s attribute at %L is not allowed outside of the " | |
3159 | "specification part of a module", attr, &seen_at[d]); | |
3160 | m = MATCH_ERROR; | |
3161 | goto cleanup; | |
3162 | } | |
ea13b9b7 | 3163 | } |
3164 | ||
4ee9c684 | 3165 | switch (d) |
3166 | { | |
3167 | case DECL_ALLOCATABLE: | |
3168 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
3169 | break; | |
3170 | ||
3171 | case DECL_DIMENSION: | |
950683ed | 3172 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 3173 | break; |
3174 | ||
3175 | case DECL_EXTERNAL: | |
3176 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
3177 | break; | |
3178 | ||
3179 | case DECL_IN: | |
3180 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
3181 | break; | |
3182 | ||
3183 | case DECL_OUT: | |
3184 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
3185 | break; | |
3186 | ||
3187 | case DECL_INOUT: | |
3188 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
3189 | break; | |
3190 | ||
3191 | case DECL_INTRINSIC: | |
3192 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
3193 | break; | |
3194 | ||
3195 | case DECL_OPTIONAL: | |
3196 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
3197 | break; | |
3198 | ||
3199 | case DECL_PARAMETER: | |
950683ed | 3200 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
4ee9c684 | 3201 | break; |
3202 | ||
3203 | case DECL_POINTER: | |
3204 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
3205 | break; | |
3206 | ||
3ea52af3 | 3207 | case DECL_PROTECTED: |
3208 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
3209 | { | |
3210 | gfc_error ("PROTECTED at %C only allowed in specification " | |
3211 | "part of a module"); | |
3212 | t = FAILURE; | |
3213 | break; | |
3214 | } | |
3215 | ||
1a9745d2 | 3216 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
3217 | "attribute at %C") | |
3ea52af3 | 3218 | == FAILURE) |
3219 | t = FAILURE; | |
3220 | else | |
3221 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
3222 | break; | |
3223 | ||
4ee9c684 | 3224 | case DECL_PRIVATE: |
950683ed | 3225 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
3226 | &seen_at[d]); | |
4ee9c684 | 3227 | break; |
3228 | ||
3229 | case DECL_PUBLIC: | |
950683ed | 3230 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
3231 | &seen_at[d]); | |
4ee9c684 | 3232 | break; |
3233 | ||
3234 | case DECL_SAVE: | |
950683ed | 3235 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 3236 | break; |
3237 | ||
3238 | case DECL_TARGET: | |
3239 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
3240 | break; | |
3241 | ||
c5d33754 | 3242 | case DECL_IS_BIND_C: |
3243 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); | |
3244 | break; | |
3245 | ||
8f6339b6 | 3246 | case DECL_VALUE: |
1a9745d2 | 3247 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
3248 | "at %C") | |
8f6339b6 | 3249 | == FAILURE) |
3250 | t = FAILURE; | |
3251 | else | |
3252 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
3253 | break; | |
3254 | ||
ef814c81 | 3255 | case DECL_VOLATILE: |
3256 | if (gfc_notify_std (GFC_STD_F2003, | |
1a9745d2 | 3257 | "Fortran 2003: VOLATILE attribute at %C") |
ef814c81 | 3258 | == FAILURE) |
3259 | t = FAILURE; | |
3260 | else | |
3261 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
3262 | break; | |
3263 | ||
4ee9c684 | 3264 | default: |
3265 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
3266 | } | |
3267 | ||
3268 | if (t == FAILURE) | |
3269 | { | |
3270 | m = MATCH_ERROR; | |
3271 | goto cleanup; | |
3272 | } | |
3273 | } | |
3274 | ||
3275 | colon_seen = 1; | |
3276 | return MATCH_YES; | |
3277 | ||
3278 | cleanup: | |
cbb9e6aa | 3279 | gfc_current_locus = start; |
4ee9c684 | 3280 | gfc_free_array_spec (current_as); |
3281 | current_as = NULL; | |
3282 | return m; | |
3283 | } | |
3284 | ||
3285 | ||
c5d33754 | 3286 | /* Set the binding label, dest_label, either with the binding label |
3287 | stored in the given gfc_typespec, ts, or if none was provided, it | |
3288 | will be the symbol name in all lower case, as required by the draft | |
3289 | (J3/04-007, section 15.4.1). If a binding label was given and | |
3290 | there is more than one argument (num_idents), it is an error. */ | |
3291 | ||
f6bb8f4b | 3292 | gfc_try |
c5d33754 | 3293 | set_binding_label (char *dest_label, const char *sym_name, int num_idents) |
3294 | { | |
825718f9 | 3295 | if (num_idents > 1 && has_name_equals) |
c5d33754 | 3296 | { |
825718f9 | 3297 | gfc_error ("Multiple identifiers provided with " |
3298 | "single NAME= specifier at %C"); | |
3299 | return FAILURE; | |
3300 | } | |
c5d33754 | 3301 | |
825718f9 | 3302 | if (curr_binding_label[0] != '\0') |
3303 | { | |
c5d33754 | 3304 | /* Binding label given; store in temp holder til have sym. */ |
b1223b39 | 3305 | strcpy (dest_label, curr_binding_label); |
c5d33754 | 3306 | } |
3307 | else | |
3308 | { | |
3309 | /* No binding label given, and the NAME= specifier did not exist, | |
3310 | which means there was no NAME="". */ | |
3311 | if (sym_name != NULL && has_name_equals == 0) | |
b1223b39 | 3312 | strcpy (dest_label, sym_name); |
c5d33754 | 3313 | } |
3314 | ||
3315 | return SUCCESS; | |
3316 | } | |
3317 | ||
3318 | ||
3319 | /* Set the status of the given common block as being BIND(C) or not, | |
3320 | depending on the given parameter, is_bind_c. */ | |
3321 | ||
3322 | void | |
3323 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) | |
3324 | { | |
3325 | com_block->is_bind_c = is_bind_c; | |
3326 | return; | |
3327 | } | |
3328 | ||
3329 | ||
3330 | /* Verify that the given gfc_typespec is for a C interoperable type. */ | |
3331 | ||
f6bb8f4b | 3332 | gfc_try |
209d3778 | 3333 | verify_c_interop (gfc_typespec *ts) |
c5d33754 | 3334 | { |
eeebe20b | 3335 | if (ts->type == BT_DERIVED && ts->u.derived != NULL) |
3336 | return (ts->u.derived->ts.is_c_interop ? SUCCESS : FAILURE); | |
c5d33754 | 3337 | else if (ts->is_c_interop != 1) |
3338 | return FAILURE; | |
3339 | ||
3340 | return SUCCESS; | |
3341 | } | |
3342 | ||
3343 | ||
3344 | /* Verify that the variables of a given common block, which has been | |
3345 | defined with the attribute specifier bind(c), to be of a C | |
3346 | interoperable type. Errors will be reported here, if | |
3347 | encountered. */ | |
3348 | ||
f6bb8f4b | 3349 | gfc_try |
c5d33754 | 3350 | verify_com_block_vars_c_interop (gfc_common_head *com_block) |
3351 | { | |
3352 | gfc_symbol *curr_sym = NULL; | |
f6bb8f4b | 3353 | gfc_try retval = SUCCESS; |
c5d33754 | 3354 | |
3355 | curr_sym = com_block->head; | |
3356 | ||
3357 | /* Make sure we have at least one symbol. */ | |
3358 | if (curr_sym == NULL) | |
3359 | return retval; | |
3360 | ||
3361 | /* Here we know we have a symbol, so we'll execute this loop | |
3362 | at least once. */ | |
3363 | do | |
3364 | { | |
3365 | /* The second to last param, 1, says this is in a common block. */ | |
3366 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); | |
3367 | curr_sym = curr_sym->common_next; | |
3368 | } while (curr_sym != NULL); | |
3369 | ||
3370 | return retval; | |
3371 | } | |
3372 | ||
3373 | ||
3374 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, | |
3375 | an appropriate error message is reported. */ | |
3376 | ||
f6bb8f4b | 3377 | gfc_try |
c5d33754 | 3378 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, |
3379 | int is_in_common, gfc_common_head *com_block) | |
3380 | { | |
1f2ab120 | 3381 | bool bind_c_function = false; |
f6bb8f4b | 3382 | gfc_try retval = SUCCESS; |
4f7bb9ec | 3383 | |
1f2ab120 | 3384 | if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c) |
3385 | bind_c_function = true; | |
3386 | ||
4f7bb9ec | 3387 | if (tmp_sym->attr.function && tmp_sym->result != NULL) |
3388 | { | |
3389 | tmp_sym = tmp_sym->result; | |
3390 | /* Make sure it wasn't an implicitly typed result. */ | |
3391 | if (tmp_sym->attr.implicit_type) | |
3392 | { | |
3393 | gfc_warning ("Implicitly declared BIND(C) function '%s' at " | |
3394 | "%L may not be C interoperable", tmp_sym->name, | |
3395 | &tmp_sym->declared_at); | |
3396 | tmp_sym->ts.f90_type = tmp_sym->ts.type; | |
3397 | /* Mark it as C interoperable to prevent duplicate warnings. */ | |
3398 | tmp_sym->ts.is_c_interop = 1; | |
3399 | tmp_sym->attr.is_c_interop = 1; | |
3400 | } | |
3401 | } | |
1f2ab120 | 3402 | |
c5d33754 | 3403 | /* Here, we know we have the bind(c) attribute, so if we have |
3404 | enough type info, then verify that it's a C interop kind. | |
3405 | The info could be in the symbol already, or possibly still in | |
3406 | the given ts (current_ts), so look in both. */ | |
3407 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) | |
3408 | { | |
209d3778 | 3409 | if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS) |
c5d33754 | 3410 | { |
3411 | /* See if we're dealing with a sym in a common block or not. */ | |
3412 | if (is_in_common == 1) | |
3413 | { | |
3414 | gfc_warning ("Variable '%s' in common block '%s' at %L " | |
3415 | "may not be a C interoperable " | |
3416 | "kind though common block '%s' is BIND(C)", | |
3417 | tmp_sym->name, com_block->name, | |
3418 | &(tmp_sym->declared_at), com_block->name); | |
3419 | } | |
3420 | else | |
3421 | { | |
3422 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) | |
3423 | gfc_error ("Type declaration '%s' at %L is not C " | |
3424 | "interoperable but it is BIND(C)", | |
3425 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3426 | else | |
3427 | gfc_warning ("Variable '%s' at %L " | |
3428 | "may not be a C interoperable " | |
3429 | "kind but it is bind(c)", | |
3430 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3431 | } | |
3432 | } | |
3433 | ||
3434 | /* Variables declared w/in a common block can't be bind(c) | |
3435 | since there's no way for C to see these variables, so there's | |
3436 | semantically no reason for the attribute. */ | |
3437 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) | |
3438 | { | |
3439 | gfc_error ("Variable '%s' in common block '%s' at " | |
3440 | "%L cannot be declared with BIND(C) " | |
3441 | "since it is not a global", | |
3442 | tmp_sym->name, com_block->name, | |
3443 | &(tmp_sym->declared_at)); | |
3444 | retval = FAILURE; | |
3445 | } | |
3446 | ||
3447 | /* Scalar variables that are bind(c) can not have the pointer | |
3448 | or allocatable attributes. */ | |
3449 | if (tmp_sym->attr.is_bind_c == 1) | |
3450 | { | |
3451 | if (tmp_sym->attr.pointer == 1) | |
3452 | { | |
3453 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3454 | "POINTER and BIND(C) attributes", | |
3455 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3456 | retval = FAILURE; | |
3457 | } | |
3458 | ||
3459 | if (tmp_sym->attr.allocatable == 1) | |
3460 | { | |
3461 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3462 | "ALLOCATABLE and BIND(C) attributes", | |
3463 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3464 | retval = FAILURE; | |
3465 | } | |
3466 | ||
1f2ab120 | 3467 | } |
3468 | ||
3469 | /* If it is a BIND(C) function, make sure the return value is a | |
3470 | scalar value. The previous tests in this function made sure | |
3471 | the type is interoperable. */ | |
3472 | if (bind_c_function && tmp_sym->as != NULL) | |
3473 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3474 | "be an array", tmp_sym->name, &(tmp_sym->declared_at)); | |
3475 | ||
3476 | /* BIND(C) functions can not return a character string. */ | |
3477 | if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER) | |
eeebe20b | 3478 | if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL |
3479 | || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT | |
3480 | || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0) | |
1f2ab120 | 3481 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " |
c5d33754 | 3482 | "be a character string", tmp_sym->name, |
3483 | &(tmp_sym->declared_at)); | |
c5d33754 | 3484 | } |
3485 | ||
3486 | /* See if the symbol has been marked as private. If it has, make sure | |
3487 | there is no binding label and warn the user if there is one. */ | |
3488 | if (tmp_sym->attr.access == ACCESS_PRIVATE | |
3489 | && tmp_sym->binding_label[0] != '\0') | |
3490 | /* Use gfc_warning_now because we won't say that the symbol fails | |
3491 | just because of this. */ | |
3492 | gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " | |
3493 | "given the binding label '%s'", tmp_sym->name, | |
3494 | &(tmp_sym->declared_at), tmp_sym->binding_label); | |
3495 | ||
3496 | return retval; | |
3497 | } | |
3498 | ||
3499 | ||
3500 | /* Set the appropriate fields for a symbol that's been declared as | |
3501 | BIND(C) (the is_bind_c flag and the binding label), and verify that | |
3502 | the type is C interoperable. Errors are reported by the functions | |
3503 | used to set/test these fields. */ | |
3504 | ||
f6bb8f4b | 3505 | gfc_try |
c5d33754 | 3506 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) |
3507 | { | |
f6bb8f4b | 3508 | gfc_try retval = SUCCESS; |
c5d33754 | 3509 | |
3510 | /* TODO: Do we need to make sure the vars aren't marked private? */ | |
3511 | ||
3512 | /* Set the is_bind_c bit in symbol_attribute. */ | |
3513 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); | |
3514 | ||
3515 | if (set_binding_label (tmp_sym->binding_label, tmp_sym->name, | |
3516 | num_idents) != SUCCESS) | |
3517 | return FAILURE; | |
3518 | ||
3519 | return retval; | |
3520 | } | |
3521 | ||
3522 | ||
3523 | /* Set the fields marking the given common block as BIND(C), including | |
3524 | a binding label, and report any errors encountered. */ | |
3525 | ||
f6bb8f4b | 3526 | gfc_try |
c5d33754 | 3527 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) |
3528 | { | |
f6bb8f4b | 3529 | gfc_try retval = SUCCESS; |
c5d33754 | 3530 | |
3531 | /* destLabel, common name, typespec (which may have binding label). */ | |
3532 | if (set_binding_label (com_block->binding_label, com_block->name, num_idents) | |
3533 | != SUCCESS) | |
3534 | return FAILURE; | |
3535 | ||
3536 | /* Set the given common block (com_block) to being bind(c) (1). */ | |
3537 | set_com_block_bind_c (com_block, 1); | |
3538 | ||
3539 | return retval; | |
3540 | } | |
3541 | ||
3542 | ||
3543 | /* Retrieve the list of one or more identifiers that the given bind(c) | |
3544 | attribute applies to. */ | |
3545 | ||
f6bb8f4b | 3546 | gfc_try |
c5d33754 | 3547 | get_bind_c_idents (void) |
3548 | { | |
3549 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3550 | int num_idents = 0; | |
3551 | gfc_symbol *tmp_sym = NULL; | |
3552 | match found_id; | |
3553 | gfc_common_head *com_block = NULL; | |
3554 | ||
3555 | if (gfc_match_name (name) == MATCH_YES) | |
3556 | { | |
3557 | found_id = MATCH_YES; | |
3558 | gfc_get_ha_symbol (name, &tmp_sym); | |
3559 | } | |
3560 | else if (match_common_name (name) == MATCH_YES) | |
3561 | { | |
3562 | found_id = MATCH_YES; | |
3563 | com_block = gfc_get_common (name, 0); | |
3564 | } | |
3565 | else | |
3566 | { | |
3567 | gfc_error ("Need either entity or common block name for " | |
3568 | "attribute specification statement at %C"); | |
3569 | return FAILURE; | |
3570 | } | |
3571 | ||
3572 | /* Save the current identifier and look for more. */ | |
3573 | do | |
3574 | { | |
3575 | /* Increment the number of identifiers found for this spec stmt. */ | |
3576 | num_idents++; | |
3577 | ||
3578 | /* Make sure we have a sym or com block, and verify that it can | |
3579 | be bind(c). Set the appropriate field(s) and look for more | |
3580 | identifiers. */ | |
3581 | if (tmp_sym != NULL || com_block != NULL) | |
3582 | { | |
3583 | if (tmp_sym != NULL) | |
3584 | { | |
3585 | if (set_verify_bind_c_sym (tmp_sym, num_idents) | |
3586 | != SUCCESS) | |
3587 | return FAILURE; | |
3588 | } | |
3589 | else | |
3590 | { | |
3591 | if (set_verify_bind_c_com_block(com_block, num_idents) | |
3592 | != SUCCESS) | |
3593 | return FAILURE; | |
3594 | } | |
3595 | ||
3596 | /* Look to see if we have another identifier. */ | |
3597 | tmp_sym = NULL; | |
3598 | if (gfc_match_eos () == MATCH_YES) | |
3599 | found_id = MATCH_NO; | |
3600 | else if (gfc_match_char (',') != MATCH_YES) | |
3601 | found_id = MATCH_NO; | |
3602 | else if (gfc_match_name (name) == MATCH_YES) | |
3603 | { | |
3604 | found_id = MATCH_YES; | |
3605 | gfc_get_ha_symbol (name, &tmp_sym); | |
3606 | } | |
3607 | else if (match_common_name (name) == MATCH_YES) | |
3608 | { | |
3609 | found_id = MATCH_YES; | |
3610 | com_block = gfc_get_common (name, 0); | |
3611 | } | |
3612 | else | |
3613 | { | |
3614 | gfc_error ("Missing entity or common block name for " | |
3615 | "attribute specification statement at %C"); | |
3616 | return FAILURE; | |
3617 | } | |
3618 | } | |
3619 | else | |
3620 | { | |
3621 | gfc_internal_error ("Missing symbol"); | |
3622 | } | |
3623 | } while (found_id == MATCH_YES); | |
3624 | ||
3625 | /* if we get here we were successful */ | |
3626 | return SUCCESS; | |
3627 | } | |
3628 | ||
3629 | ||
3630 | /* Try and match a BIND(C) attribute specification statement. */ | |
3631 | ||
3632 | match | |
3633 | gfc_match_bind_c_stmt (void) | |
3634 | { | |
3635 | match found_match = MATCH_NO; | |
3636 | gfc_typespec *ts; | |
3637 | ||
3638 | ts = ¤t_ts; | |
3639 | ||
3640 | /* This may not be necessary. */ | |
3641 | gfc_clear_ts (ts); | |
3642 | /* Clear the temporary binding label holder. */ | |
3643 | curr_binding_label[0] = '\0'; | |
3644 | ||
3645 | /* Look for the bind(c). */ | |
75ae7f6c | 3646 | found_match = gfc_match_bind_c (NULL, true); |
c5d33754 | 3647 | |
3648 | if (found_match == MATCH_YES) | |
3649 | { | |
3650 | /* Look for the :: now, but it is not required. */ | |
3651 | gfc_match (" :: "); | |
3652 | ||
3653 | /* Get the identifier(s) that needs to be updated. This may need to | |
3654 | change to hand the flag(s) for the attr specified so all identifiers | |
3655 | found can have all appropriate parts updated (assuming that the same | |
3656 | spec stmt can have multiple attrs, such as both bind(c) and | |
3657 | allocatable...). */ | |
3658 | if (get_bind_c_idents () != SUCCESS) | |
3659 | /* Error message should have printed already. */ | |
3660 | return MATCH_ERROR; | |
3661 | } | |
3662 | ||
3663 | return found_match; | |
3664 | } | |
3665 | ||
3666 | ||
4ee9c684 | 3667 | /* Match a data declaration statement. */ |
3668 | ||
3669 | match | |
3670 | gfc_match_data_decl (void) | |
3671 | { | |
3672 | gfc_symbol *sym; | |
3673 | match m; | |
3923b69f | 3674 | int elem; |
4ee9c684 | 3675 | |
c5d33754 | 3676 | num_idents_on_line = 0; |
3677 | ||
67a51c8e | 3678 | m = gfc_match_type_spec (¤t_ts, 0); |
4ee9c684 | 3679 | if (m != MATCH_YES) |
3680 | return m; | |
3681 | ||
3682 | if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) | |
3683 | { | |
eeebe20b | 3684 | sym = gfc_use_derived (current_ts.u.derived); |
4ee9c684 | 3685 | |
3686 | if (sym == NULL) | |
3687 | { | |
3688 | m = MATCH_ERROR; | |
3689 | goto cleanup; | |
3690 | } | |
3691 | ||
eeebe20b | 3692 | current_ts.u.derived = sym; |
4ee9c684 | 3693 | } |
3694 | ||
3695 | m = match_attr_spec (); | |
3696 | if (m == MATCH_ERROR) | |
3697 | { | |
3698 | m = MATCH_NO; | |
3699 | goto cleanup; | |
3700 | } | |
3701 | ||
eeebe20b | 3702 | if (current_ts.type == BT_DERIVED && current_ts.u.derived->components == NULL |
3703 | && !current_ts.u.derived->attr.zero_comp) | |
4ee9c684 | 3704 | { |
3705 | ||
3706 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
3707 | goto ok; | |
3708 | ||
eeebe20b | 3709 | gfc_find_symbol (current_ts.u.derived->name, |
3710 | current_ts.u.derived->ns->parent, 1, &sym); | |
4ee9c684 | 3711 | |
40cf8078 | 3712 | /* Any symbol that we find had better be a type definition |
1a9745d2 | 3713 | which has its components defined. */ |
40cf8078 | 3714 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
eeebe20b | 3715 | && (current_ts.u.derived->components != NULL |
3716 | || current_ts.u.derived->attr.zero_comp)) | |
4ee9c684 | 3717 | goto ok; |
3718 | ||
40cf8078 | 3719 | /* Now we have an error, which we signal, and then fix up |
3720 | because the knock-on is plain and simple confusing. */ | |
3721 | gfc_error_now ("Derived type at %C has not been previously defined " | |
1a9745d2 | 3722 | "and so cannot appear in a derived type definition"); |
40cf8078 | 3723 | current_attr.pointer = 1; |
3724 | goto ok; | |
4ee9c684 | 3725 | } |
3726 | ||
3727 | ok: | |
3728 | /* If we have an old-style character declaration, and no new-style | |
3729 | attribute specifications, then there a comma is optional between | |
3730 | the type specification and the variable list. */ | |
3731 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
3732 | gfc_match_char (','); | |
3733 | ||
3923b69f | 3734 | /* Give the types/attributes to symbols that follow. Give the element |
3735 | a number so that repeat character length expressions can be copied. */ | |
3736 | elem = 1; | |
4ee9c684 | 3737 | for (;;) |
3738 | { | |
c5d33754 | 3739 | num_idents_on_line++; |
3923b69f | 3740 | m = variable_decl (elem++); |
4ee9c684 | 3741 | if (m == MATCH_ERROR) |
3742 | goto cleanup; | |
3743 | if (m == MATCH_NO) | |
3744 | break; | |
3745 | ||
3746 | if (gfc_match_eos () == MATCH_YES) | |
3747 | goto cleanup; | |
3748 | if (gfc_match_char (',') != MATCH_YES) | |
3749 | break; | |
3750 | } | |
3751 | ||
8f0bdb23 | 3752 | if (gfc_error_flag_test () == 0) |
3753 | gfc_error ("Syntax error in data declaration at %C"); | |
4ee9c684 | 3754 | m = MATCH_ERROR; |
3755 | ||
af29c1f0 | 3756 | gfc_free_data_all (gfc_current_ns); |
3757 | ||
4ee9c684 | 3758 | cleanup: |
3759 | gfc_free_array_spec (current_as); | |
3760 | current_as = NULL; | |
3761 | return m; | |
3762 | } | |
3763 | ||
3764 | ||
3765 | /* Match a prefix associated with a function or subroutine | |
3766 | declaration. If the typespec pointer is nonnull, then a typespec | |
3767 | can be matched. Note that if nothing matches, MATCH_YES is | |
3768 | returned (the null string was matched). */ | |
3769 | ||
077932f9 | 3770 | match |
3771 | gfc_match_prefix (gfc_typespec *ts) | |
4ee9c684 | 3772 | { |
5b11d932 | 3773 | bool seen_type; |
4ee9c684 | 3774 | |
3775 | gfc_clear_attr (¤t_attr); | |
3776 | seen_type = 0; | |
3777 | ||
d1645c7b | 3778 | gcc_assert (!gfc_matching_prefix); |
3779 | gfc_matching_prefix = true; | |
40de255b | 3780 | |
4ee9c684 | 3781 | loop: |
3782 | if (!seen_type && ts != NULL | |
67a51c8e | 3783 | && gfc_match_type_spec (ts, 0) == MATCH_YES |
4ee9c684 | 3784 | && gfc_match_space () == MATCH_YES) |
3785 | { | |
3786 | ||
3787 | seen_type = 1; | |
3788 | goto loop; | |
3789 | } | |
3790 | ||
3791 | if (gfc_match ("elemental% ") == MATCH_YES) | |
3792 | { | |
3793 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
40de255b | 3794 | goto error; |
4ee9c684 | 3795 | |
3796 | goto loop; | |
3797 | } | |
3798 | ||
3799 | if (gfc_match ("pure% ") == MATCH_YES) | |
3800 | { | |
3801 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
40de255b | 3802 | goto error; |
4ee9c684 | 3803 | |
3804 | goto loop; | |
3805 | } | |
3806 | ||
3807 | if (gfc_match ("recursive% ") == MATCH_YES) | |
3808 | { | |
3809 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
40de255b | 3810 | goto error; |
4ee9c684 | 3811 | |
3812 | goto loop; | |
3813 | } | |
3814 | ||
3815 | /* At this point, the next item is not a prefix. */ | |
d1645c7b | 3816 | gcc_assert (gfc_matching_prefix); |
3817 | gfc_matching_prefix = false; | |
4ee9c684 | 3818 | return MATCH_YES; |
40de255b | 3819 | |
3820 | error: | |
d1645c7b | 3821 | gcc_assert (gfc_matching_prefix); |
3822 | gfc_matching_prefix = false; | |
40de255b | 3823 | return MATCH_ERROR; |
4ee9c684 | 3824 | } |
3825 | ||
3826 | ||
077932f9 | 3827 | /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */ |
4ee9c684 | 3828 | |
f6bb8f4b | 3829 | static gfc_try |
1a9745d2 | 3830 | copy_prefix (symbol_attribute *dest, locus *where) |
4ee9c684 | 3831 | { |
4ee9c684 | 3832 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
3833 | return FAILURE; | |
3834 | ||
3835 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
3836 | return FAILURE; | |
3837 | ||
3838 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
3839 | return FAILURE; | |
3840 | ||
3841 | return SUCCESS; | |
3842 | } | |
3843 | ||
3844 | ||
3845 | /* Match a formal argument list. */ | |
3846 | ||
3847 | match | |
1a9745d2 | 3848 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
4ee9c684 | 3849 | { |
3850 | gfc_formal_arglist *head, *tail, *p, *q; | |
3851 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3852 | gfc_symbol *sym; | |
3853 | match m; | |
3854 | ||
3855 | head = tail = NULL; | |
3856 | ||
3857 | if (gfc_match_char ('(') != MATCH_YES) | |
3858 | { | |
3859 | if (null_flag) | |
3860 | goto ok; | |
3861 | return MATCH_NO; | |
3862 | } | |
3863 | ||
3864 | if (gfc_match_char (')') == MATCH_YES) | |
3865 | goto ok; | |
3866 | ||
3867 | for (;;) | |
3868 | { | |
3869 | if (gfc_match_char ('*') == MATCH_YES) | |
3870 | sym = NULL; | |
3871 | else | |
3872 | { | |
3873 | m = gfc_match_name (name); | |
3874 | if (m != MATCH_YES) | |
3875 | goto cleanup; | |
3876 | ||
3877 | if (gfc_get_symbol (name, NULL, &sym)) | |
3878 | goto cleanup; | |
3879 | } | |
3880 | ||
3881 | p = gfc_get_formal_arglist (); | |
3882 | ||
3883 | if (head == NULL) | |
3884 | head = tail = p; | |
3885 | else | |
3886 | { | |
3887 | tail->next = p; | |
3888 | tail = p; | |
3889 | } | |
3890 | ||
3891 | tail->sym = sym; | |
3892 | ||
3893 | /* We don't add the VARIABLE flavor because the name could be a | |
1a9745d2 | 3894 | dummy procedure. We don't apply these attributes to formal |
3895 | arguments of statement functions. */ | |
4ee9c684 | 3896 | if (sym != NULL && !st_flag |
950683ed | 3897 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
4ee9c684 | 3898 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
3899 | { | |
3900 | m = MATCH_ERROR; | |
3901 | goto cleanup; | |
3902 | } | |
3903 | ||
3904 | /* The name of a program unit can be in a different namespace, | |
1a9745d2 | 3905 | so check for it explicitly. After the statement is accepted, |
3906 | the name is checked for especially in gfc_get_symbol(). */ | |
4ee9c684 | 3907 | if (gfc_new_block != NULL && sym != NULL |
3908 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
3909 | { | |
3910 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
3911 | sym->name); | |
3912 | m = MATCH_ERROR; | |
3913 | goto cleanup; | |
3914 | } | |
3915 | ||
3916 | if (gfc_match_char (')') == MATCH_YES) | |
3917 | goto ok; | |
3918 | ||
3919 | m = gfc_match_char (','); | |
3920 | if (m != MATCH_YES) | |
3921 | { | |
3922 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
3923 | goto cleanup; | |
3924 | } | |
3925 | } | |
3926 | ||
3927 | ok: | |
3928 | /* Check for duplicate symbols in the formal argument list. */ | |
3929 | if (head != NULL) | |
3930 | { | |
3931 | for (p = head; p->next; p = p->next) | |
3932 | { | |
3933 | if (p->sym == NULL) | |
3934 | continue; | |
3935 | ||
3936 | for (q = p->next; q; q = q->next) | |
3937 | if (p->sym == q->sym) | |
3938 | { | |
1a9745d2 | 3939 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
3940 | "at %C", p->sym->name); | |
4ee9c684 | 3941 | |
3942 | m = MATCH_ERROR; | |
3943 | goto cleanup; | |
3944 | } | |
3945 | } | |
3946 | } | |
3947 | ||
f6d0e37a | 3948 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) |
3949 | == FAILURE) | |
4ee9c684 | 3950 | { |
3951 | m = MATCH_ERROR; | |
3952 | goto cleanup; | |
3953 | } | |
3954 | ||
3955 | return MATCH_YES; | |
3956 | ||
3957 | cleanup: | |
3958 | gfc_free_formal_arglist (head); | |
3959 | return m; | |
3960 | } | |
3961 | ||
3962 | ||
3963 | /* Match a RESULT specification following a function declaration or | |
3964 | ENTRY statement. Also matches the end-of-statement. */ | |
3965 | ||
3966 | static match | |
f6d0e37a | 3967 | match_result (gfc_symbol *function, gfc_symbol **result) |
4ee9c684 | 3968 | { |
3969 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3970 | gfc_symbol *r; | |
3971 | match m; | |
3972 | ||
3973 | if (gfc_match (" result (") != MATCH_YES) | |
3974 | return MATCH_NO; | |
3975 | ||
3976 | m = gfc_match_name (name); | |
3977 | if (m != MATCH_YES) | |
3978 | return m; | |
3979 | ||
c5d33754 | 3980 | /* Get the right paren, and that's it because there could be the |
3981 | bind(c) attribute after the result clause. */ | |
3982 | if (gfc_match_char(')') != MATCH_YES) | |
4ee9c684 | 3983 | { |
c5d33754 | 3984 | /* TODO: should report the missing right paren here. */ |
4ee9c684 | 3985 | return MATCH_ERROR; |
3986 | } | |
3987 | ||
3988 | if (strcmp (function->name, name) == 0) | |
3989 | { | |
1a9745d2 | 3990 | gfc_error ("RESULT variable at %C must be different than function name"); |
4ee9c684 | 3991 | return MATCH_ERROR; |
3992 | } | |
3993 | ||
3994 | if (gfc_get_symbol (name, NULL, &r)) | |
3995 | return MATCH_ERROR; | |
3996 | ||
f6d3042b | 3997 | if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE) |
4ee9c684 | 3998 | return MATCH_ERROR; |
3999 | ||
4000 | *result = r; | |
4001 | ||
4002 | return MATCH_YES; | |
4003 | } | |
4004 | ||
4005 | ||
c5d33754 | 4006 | /* Match a function suffix, which could be a combination of a result |
4007 | clause and BIND(C), either one, or neither. The draft does not | |
4008 | require them to come in a specific order. */ | |
4009 | ||
4010 | match | |
4011 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) | |
4012 | { | |
4013 | match is_bind_c; /* Found bind(c). */ | |
4014 | match is_result; /* Found result clause. */ | |
4015 | match found_match; /* Status of whether we've found a good match. */ | |
e0be6f02 | 4016 | char peek_char; /* Character we're going to peek at. */ |
75ae7f6c | 4017 | bool allow_binding_name; |
c5d33754 | 4018 | |
4019 | /* Initialize to having found nothing. */ | |
4020 | found_match = MATCH_NO; | |
4021 | is_bind_c = MATCH_NO; | |
4022 | is_result = MATCH_NO; | |
4023 | ||
4024 | /* Get the next char to narrow between result and bind(c). */ | |
4025 | gfc_gobble_whitespace (); | |
e0be6f02 | 4026 | peek_char = gfc_peek_ascii_char (); |
c5d33754 | 4027 | |
75ae7f6c | 4028 | /* C binding names are not allowed for internal procedures. */ |
4029 | if (gfc_current_state () == COMP_CONTAINS | |
4030 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
4031 | allow_binding_name = false; | |
4032 | else | |
4033 | allow_binding_name = true; | |
4034 | ||
c5d33754 | 4035 | switch (peek_char) |
4036 | { | |
4037 | case 'r': | |
4038 | /* Look for result clause. */ | |
4039 | is_result = match_result (sym, result); | |
4040 | if (is_result == MATCH_YES) | |
4041 | { | |
4042 | /* Now see if there is a bind(c) after it. */ | |
75ae7f6c | 4043 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 4044 | /* We've found the result clause and possibly bind(c). */ |
4045 | found_match = MATCH_YES; | |
4046 | } | |
4047 | else | |
4048 | /* This should only be MATCH_ERROR. */ | |
4049 | found_match = is_result; | |
4050 | break; | |
4051 | case 'b': | |
4052 | /* Look for bind(c) first. */ | |
75ae7f6c | 4053 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 4054 | if (is_bind_c == MATCH_YES) |
4055 | { | |
4056 | /* Now see if a result clause followed it. */ | |
4057 | is_result = match_result (sym, result); | |
4058 | found_match = MATCH_YES; | |
4059 | } | |
4060 | else | |
4061 | { | |
4062 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ | |
4063 | found_match = MATCH_ERROR; | |
4064 | } | |
4065 | break; | |
4066 | default: | |
4067 | gfc_error ("Unexpected junk after function declaration at %C"); | |
4068 | found_match = MATCH_ERROR; | |
4069 | break; | |
4070 | } | |
4071 | ||
c5d33754 | 4072 | if (is_bind_c == MATCH_YES) |
4518e961 | 4073 | { |
75ae7f6c | 4074 | /* Fortran 2008 draft allows BIND(C) for internal procedures. */ |
4518e961 | 4075 | if (gfc_current_state () == COMP_CONTAINS |
75ae7f6c | 4076 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
2dcae6c7 | 4077 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
4078 | "at %L may not be specified for an internal " | |
4079 | "procedure", &gfc_current_locus) | |
75ae7f6c | 4080 | == FAILURE) |
4081 | return MATCH_ERROR; | |
4082 | ||
4518e961 | 4083 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) |
4084 | == FAILURE) | |
4085 | return MATCH_ERROR; | |
4086 | } | |
c5d33754 | 4087 | |
4088 | return found_match; | |
4089 | } | |
4090 | ||
4091 | ||
1e057e9b | 4092 | /* Procedure pointer return value without RESULT statement: |
4093 | Add "hidden" result variable named "ppr@". */ | |
4094 | ||
4095 | static gfc_try | |
4096 | add_hidden_procptr_result (gfc_symbol *sym) | |
4097 | { | |
4098 | bool case1,case2; | |
4099 | ||
4100 | if (gfc_notification_std (GFC_STD_F2003) == ERROR) | |
4101 | return FAILURE; | |
4102 | ||
4103 | /* First usage case: PROCEDURE and EXTERNAL statements. */ | |
4104 | case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block () | |
4105 | && strcmp (gfc_current_block ()->name, sym->name) == 0 | |
4106 | && sym->attr.external; | |
4107 | /* Second usage case: INTERFACE statements. */ | |
4108 | case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous | |
4109 | && gfc_state_stack->previous->state == COMP_FUNCTION | |
4110 | && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0; | |
4111 | ||
4112 | if (case1 || case2) | |
4113 | { | |
4114 | gfc_symtree *stree; | |
4115 | if (case1) | |
36b0a1b0 | 4116 | gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false); |
1e057e9b | 4117 | else if (case2) |
180a5dc0 | 4118 | { |
4119 | gfc_symtree *st2; | |
36b0a1b0 | 4120 | gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false); |
180a5dc0 | 4121 | st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@"); |
4122 | st2->n.sym = stree->n.sym; | |
4123 | } | |
1e057e9b | 4124 | sym->result = stree->n.sym; |
4125 | ||
4126 | sym->result->attr.proc_pointer = sym->attr.proc_pointer; | |
4127 | sym->result->attr.pointer = sym->attr.pointer; | |
4128 | sym->result->attr.external = sym->attr.external; | |
4129 | sym->result->attr.referenced = sym->attr.referenced; | |
e40ac2fe | 4130 | sym->result->ts = sym->ts; |
1e057e9b | 4131 | sym->attr.proc_pointer = 0; |
4132 | sym->attr.pointer = 0; | |
4133 | sym->attr.external = 0; | |
4134 | if (sym->result->attr.external && sym->result->attr.pointer) | |
4135 | { | |
4136 | sym->result->attr.pointer = 0; | |
4137 | sym->result->attr.proc_pointer = 1; | |
4138 | } | |
4139 | ||
4140 | return gfc_add_result (&sym->result->attr, sym->result->name, NULL); | |
4141 | } | |
4142 | /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */ | |
4143 | else if (sym->attr.function && !sym->attr.external && sym->attr.pointer | |
4144 | && sym->result && sym->result != sym && sym->result->attr.external | |
4145 | && sym == gfc_current_ns->proc_name | |
4146 | && sym == sym->result->ns->proc_name | |
4147 | && strcmp ("ppr@", sym->result->name) == 0) | |
4148 | { | |
4149 | sym->result->attr.proc_pointer = 1; | |
4150 | sym->attr.pointer = 0; | |
4151 | return SUCCESS; | |
4152 | } | |
4153 | else | |
4154 | return FAILURE; | |
4155 | } | |
4156 | ||
4157 | ||
64e93293 | 4158 | /* Match the interface for a PROCEDURE declaration, |
4159 | including brackets (R1212). */ | |
af1a34ee | 4160 | |
4161 | static match | |
64e93293 | 4162 | match_procedure_interface (gfc_symbol **proc_if) |
af1a34ee | 4163 | { |
4164 | match m; | |
1eb2b542 | 4165 | gfc_symtree *st; |
af1a34ee | 4166 | locus old_loc, entry_loc; |
1eb2b542 | 4167 | gfc_namespace *old_ns = gfc_current_ns; |
4168 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
af1a34ee | 4169 | |
1eb2b542 | 4170 | old_loc = entry_loc = gfc_current_locus; |
af1a34ee | 4171 | gfc_clear_ts (¤t_ts); |
4172 | ||
4173 | if (gfc_match (" (") != MATCH_YES) | |
4174 | { | |
4175 | gfc_current_locus = entry_loc; | |
4176 | return MATCH_NO; | |
4177 | } | |
4178 | ||
4179 | /* Get the type spec. for the procedure interface. */ | |
4180 | old_loc = gfc_current_locus; | |
67a51c8e | 4181 | m = gfc_match_type_spec (¤t_ts, 0); |
fd1277c3 | 4182 | gfc_gobble_whitespace (); |
e0be6f02 | 4183 | if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')')) |
af1a34ee | 4184 | goto got_ts; |
4185 | ||
4186 | if (m == MATCH_ERROR) | |
4187 | return m; | |
4188 | ||
1eb2b542 | 4189 | /* Procedure interface is itself a procedure. */ |
af1a34ee | 4190 | gfc_current_locus = old_loc; |
1eb2b542 | 4191 | m = gfc_match_name (name); |
af1a34ee | 4192 | |
1eb2b542 | 4193 | /* First look to see if it is already accessible in the current |
4194 | namespace because it is use associated or contained. */ | |
4195 | st = NULL; | |
4196 | if (gfc_find_sym_tree (name, NULL, 0, &st)) | |
4197 | return MATCH_ERROR; | |
4198 | ||
4199 | /* If it is still not found, then try the parent namespace, if it | |
4200 | exists and create the symbol there if it is still not found. */ | |
4201 | if (gfc_current_ns->parent) | |
4202 | gfc_current_ns = gfc_current_ns->parent; | |
4203 | if (st == NULL && gfc_get_ha_sym_tree (name, &st)) | |
4204 | return MATCH_ERROR; | |
4205 | ||
4206 | gfc_current_ns = old_ns; | |
4207 | *proc_if = st->n.sym; | |
af1a34ee | 4208 | |
4209 | /* Various interface checks. */ | |
64e93293 | 4210 | if (*proc_if) |
af1a34ee | 4211 | { |
64e93293 | 4212 | (*proc_if)->refs++; |
74113644 | 4213 | /* Resolve interface if possible. That way, attr.procedure is only set |
4214 | if it is declared by a later procedure-declaration-stmt, which is | |
4215 | invalid per C1212. */ | |
64e93293 | 4216 | while ((*proc_if)->ts.interface) |
4217 | *proc_if = (*proc_if)->ts.interface; | |
74113644 | 4218 | |
64e93293 | 4219 | if ((*proc_if)->generic) |
af1a34ee | 4220 | { |
64e93293 | 4221 | gfc_error ("Interface '%s' at %C may not be generic", |
4222 | (*proc_if)->name); | |
af1a34ee | 4223 | return MATCH_ERROR; |
4224 | } | |
64e93293 | 4225 | if ((*proc_if)->attr.proc == PROC_ST_FUNCTION) |
af1a34ee | 4226 | { |
4227 | gfc_error ("Interface '%s' at %C may not be a statement function", | |
64e93293 | 4228 | (*proc_if)->name); |
af1a34ee | 4229 | return MATCH_ERROR; |
4230 | } | |
4231 | /* Handle intrinsic procedures. */ | |
64e93293 | 4232 | if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc |
4233 | || (*proc_if)->attr.if_source == IFSRC_IFBODY) | |
4234 | && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus) | |
4235 | || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus))) | |
4236 | (*proc_if)->attr.intrinsic = 1; | |
4237 | if ((*proc_if)->attr.intrinsic | |
4238 | && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0)) | |
af1a34ee | 4239 | { |
4240 | gfc_error ("Intrinsic procedure '%s' not allowed " | |
64e93293 | 4241 | "in PROCEDURE statement at %C", (*proc_if)->name); |
af1a34ee | 4242 | return MATCH_ERROR; |
4243 | } | |
af1a34ee | 4244 | } |
4245 | ||
4246 | got_ts: | |
af1a34ee | 4247 | if (gfc_match (" )") != MATCH_YES) |
4248 | { | |
4249 | gfc_current_locus = entry_loc; | |
4250 | return MATCH_NO; | |
4251 | } | |
4252 | ||
64e93293 | 4253 | return MATCH_YES; |
4254 | } | |
4255 | ||
4256 | ||
4257 | /* Match a PROCEDURE declaration (R1211). */ | |
4258 | ||
4259 | static match | |
4260 | match_procedure_decl (void) | |
4261 | { | |
4262 | match m; | |
4263 | gfc_symbol *sym, *proc_if = NULL; | |
4264 | int num; | |
4265 | gfc_expr *initializer = NULL; | |
4266 | ||
4267 | /* Parse interface (with brackets). */ | |
4268 | m = match_procedure_interface (&proc_if); | |
4269 | if (m != MATCH_YES) | |
4270 | return m; | |
4271 | ||
4272 | /* Parse attributes (with colons). */ | |
af1a34ee | 4273 | m = match_attr_spec(); |
4274 | if (m == MATCH_ERROR) | |
4275 | return MATCH_ERROR; | |
4276 | ||
4277 | /* Get procedure symbols. */ | |
4278 | for(num=1;;num++) | |
4279 | { | |
af1a34ee | 4280 | m = gfc_match_symbol (&sym, 0); |
4281 | if (m == MATCH_NO) | |
4282 | goto syntax; | |
4283 | else if (m == MATCH_ERROR) | |
4284 | return m; | |
4285 | ||
4286 | /* Add current_attr to the symbol attributes. */ | |
4287 | if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
4288 | return MATCH_ERROR; | |
4289 | ||
4290 | if (sym->attr.is_bind_c) | |
4291 | { | |
4292 | /* Check for C1218. */ | |
4293 | if (!proc_if || !proc_if->attr.is_bind_c) | |
4294 | { | |
4295 | gfc_error ("BIND(C) attribute at %C requires " | |
4296 | "an interface with BIND(C)"); | |
4297 | return MATCH_ERROR; | |
4298 | } | |
4299 | /* Check for C1217. */ | |
4300 | if (has_name_equals && sym->attr.pointer) | |
4301 | { | |
4302 | gfc_error ("BIND(C) procedure with NAME may not have " | |
4303 | "POINTER attribute at %C"); | |
4304 | return MATCH_ERROR; | |
4305 | } | |
4306 | if (has_name_equals && sym->attr.dummy) | |
4307 | { | |
4308 | gfc_error ("Dummy procedure at %C may not have " | |
4309 | "BIND(C) attribute with NAME"); | |
4310 | return MATCH_ERROR; | |
4311 | } | |
4312 | /* Set binding label for BIND(C). */ | |
4313 | if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS) | |
4314 | return MATCH_ERROR; | |
4315 | } | |
4316 | ||
cad0ddcf | 4317 | if (gfc_add_external (&sym->attr, NULL) == FAILURE) |
af1a34ee | 4318 | return MATCH_ERROR; |
1e057e9b | 4319 | |
4320 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4321 | sym = sym->result; | |
4322 | ||
af1a34ee | 4323 | if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE) |
4324 | return MATCH_ERROR; | |
4325 | ||
4326 | /* Set interface. */ | |
4327 | if (proc_if != NULL) | |
f7d7a083 | 4328 | { |
13a834aa | 4329 | if (sym->ts.type != BT_UNKNOWN) |
4330 | { | |
4331 | gfc_error ("Procedure '%s' at %L already has basic type of %s", | |
4332 | sym->name, &gfc_current_locus, | |
4333 | gfc_basic_typename (sym->ts.type)); | |
4334 | return MATCH_ERROR; | |
4335 | } | |
2cd2bb5c | 4336 | sym->ts.interface = proc_if; |
f7d7a083 | 4337 | sym->attr.untyped = 1; |
180a5dc0 | 4338 | sym->attr.if_source = IFSRC_IFBODY; |
f7d7a083 | 4339 | } |
af1a34ee | 4340 | else if (current_ts.type != BT_UNKNOWN) |
4341 | { | |
13a834aa | 4342 | if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) |
4343 | return MATCH_ERROR; | |
2cd2bb5c | 4344 | sym->ts.interface = gfc_new_symbol ("", gfc_current_ns); |
4345 | sym->ts.interface->ts = current_ts; | |
4346 | sym->ts.interface->attr.function = 1; | |
4347 | sym->attr.function = sym->ts.interface->attr.function; | |
180a5dc0 | 4348 | sym->attr.if_source = IFSRC_UNKNOWN; |
af1a34ee | 4349 | } |
4350 | ||
cad0ddcf | 4351 | if (gfc_match (" =>") == MATCH_YES) |
4352 | { | |
4353 | if (!current_attr.pointer) | |
4354 | { | |
4355 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
4356 | m = MATCH_ERROR; | |
4357 | goto cleanup; | |
4358 | } | |
4359 | ||
4360 | m = gfc_match_null (&initializer); | |
4361 | if (m == MATCH_NO) | |
4362 | { | |
4363 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4364 | m = MATCH_ERROR; | |
4365 | } | |
4366 | ||
4367 | if (gfc_pure (NULL)) | |
4368 | { | |
4369 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4370 | "a PURE procedure"); | |
4371 | m = MATCH_ERROR; | |
4372 | } | |
4373 | ||
4374 | if (m != MATCH_YES) | |
4375 | goto cleanup; | |
4376 | ||
4377 | if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus) | |
4378 | != SUCCESS) | |
4379 | goto cleanup; | |
4380 | ||
4381 | } | |
4382 | ||
4383 | gfc_set_sym_referenced (sym); | |
4384 | ||
af1a34ee | 4385 | if (gfc_match_eos () == MATCH_YES) |
4386 | return MATCH_YES; | |
4387 | if (gfc_match_char (',') != MATCH_YES) | |
4388 | goto syntax; | |
4389 | } | |
4390 | ||
4391 | syntax: | |
4392 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4393 | return MATCH_ERROR; | |
cad0ddcf | 4394 | |
4395 | cleanup: | |
4396 | /* Free stuff up and return. */ | |
4397 | gfc_free_expr (initializer); | |
4398 | return m; | |
af1a34ee | 4399 | } |
4400 | ||
4401 | ||
64e93293 | 4402 | static match |
4403 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc); | |
4404 | ||
4405 | ||
4406 | /* Match a procedure pointer component declaration (R445). */ | |
4407 | ||
4408 | static match | |
4409 | match_ppc_decl (void) | |
4410 | { | |
4411 | match m; | |
4412 | gfc_symbol *proc_if = NULL; | |
4413 | gfc_typespec ts; | |
4414 | int num; | |
4415 | gfc_component *c; | |
4416 | gfc_expr *initializer = NULL; | |
4417 | gfc_typebound_proc* tb; | |
4418 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4419 | ||
4420 | /* Parse interface (with brackets). */ | |
4421 | m = match_procedure_interface (&proc_if); | |
4422 | if (m != MATCH_YES) | |
4423 | goto syntax; | |
4424 | ||
4425 | /* Parse attributes. */ | |
4426 | tb = XCNEW (gfc_typebound_proc); | |
4427 | tb->where = gfc_current_locus; | |
4428 | m = match_binding_attributes (tb, false, true); | |
4429 | if (m == MATCH_ERROR) | |
4430 | return m; | |
4431 | ||
64e93293 | 4432 | gfc_clear_attr (¤t_attr); |
4433 | current_attr.procedure = 1; | |
4434 | current_attr.proc_pointer = 1; | |
4435 | current_attr.access = tb->access; | |
4436 | current_attr.flavor = FL_PROCEDURE; | |
4437 | ||
4438 | /* Match the colons (required). */ | |
4439 | if (gfc_match (" ::") != MATCH_YES) | |
4440 | { | |
4441 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
4442 | return MATCH_ERROR; | |
4443 | } | |
4444 | ||
4445 | /* Check for C450. */ | |
4446 | if (!tb->nopass && proc_if == NULL) | |
4447 | { | |
4448 | gfc_error("NOPASS or explicit interface required at %C"); | |
4449 | return MATCH_ERROR; | |
4450 | } | |
4451 | ||
8a026279 | 4452 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Procedure pointer " |
4453 | "component at %C") == FAILURE) | |
4454 | return MATCH_ERROR; | |
4455 | ||
64e93293 | 4456 | /* Match PPC names. */ |
4457 | ts = current_ts; | |
4458 | for(num=1;;num++) | |
4459 | { | |
4460 | m = gfc_match_name (name); | |
4461 | if (m == MATCH_NO) | |
4462 | goto syntax; | |
4463 | else if (m == MATCH_ERROR) | |
4464 | return m; | |
4465 | ||
4466 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
4467 | return MATCH_ERROR; | |
4468 | ||
4469 | /* Add current_attr to the symbol attributes. */ | |
4470 | if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE) | |
4471 | return MATCH_ERROR; | |
4472 | ||
4473 | if (gfc_add_external (&c->attr, NULL) == FAILURE) | |
4474 | return MATCH_ERROR; | |
4475 | ||
4476 | if (gfc_add_proc (&c->attr, name, NULL) == FAILURE) | |
4477 | return MATCH_ERROR; | |
4478 | ||
fe9b08a2 | 4479 | c->tb = tb; |
4480 | ||
64e93293 | 4481 | /* Set interface. */ |
4482 | if (proc_if != NULL) | |
4483 | { | |
4484 | c->ts.interface = proc_if; | |
4485 | c->attr.untyped = 1; | |
4486 | c->attr.if_source = IFSRC_IFBODY; | |
4487 | } | |
4488 | else if (ts.type != BT_UNKNOWN) | |
4489 | { | |
4490 | c->ts = ts; | |
4491 | c->ts.interface = gfc_new_symbol ("", gfc_current_ns); | |
4492 | c->ts.interface->ts = ts; | |
4493 | c->ts.interface->attr.function = 1; | |
4494 | c->attr.function = c->ts.interface->attr.function; | |
4495 | c->attr.if_source = IFSRC_UNKNOWN; | |
4496 | } | |
4497 | ||
4498 | if (gfc_match (" =>") == MATCH_YES) | |
4499 | { | |
4500 | m = gfc_match_null (&initializer); | |
4501 | if (m == MATCH_NO) | |
4502 | { | |
4503 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4504 | m = MATCH_ERROR; | |
4505 | } | |
4506 | if (gfc_pure (NULL)) | |
4507 | { | |
4508 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4509 | "a PURE procedure"); | |
4510 | m = MATCH_ERROR; | |
4511 | } | |
4512 | if (m != MATCH_YES) | |
4513 | { | |
4514 | gfc_free_expr (initializer); | |
4515 | return m; | |
4516 | } | |
4517 | c->initializer = initializer; | |
4518 | } | |
4519 | ||
4520 | if (gfc_match_eos () == MATCH_YES) | |
4521 | return MATCH_YES; | |
4522 | if (gfc_match_char (',') != MATCH_YES) | |
4523 | goto syntax; | |
4524 | } | |
4525 | ||
4526 | syntax: | |
4527 | gfc_error ("Syntax error in procedure pointer component at %C"); | |
4528 | return MATCH_ERROR; | |
4529 | } | |
4530 | ||
4531 | ||
af1a34ee | 4532 | /* Match a PROCEDURE declaration inside an interface (R1206). */ |
4533 | ||
4534 | static match | |
4535 | match_procedure_in_interface (void) | |
4536 | { | |
4537 | match m; | |
4538 | gfc_symbol *sym; | |
4539 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4540 | ||
4541 | if (current_interface.type == INTERFACE_NAMELESS | |
4542 | || current_interface.type == INTERFACE_ABSTRACT) | |
4543 | { | |
4544 | gfc_error ("PROCEDURE at %C must be in a generic interface"); | |
4545 | return MATCH_ERROR; | |
4546 | } | |
4547 | ||
4548 | for(;;) | |
4549 | { | |
4550 | m = gfc_match_name (name); | |
4551 | if (m == MATCH_NO) | |
4552 | goto syntax; | |
4553 | else if (m == MATCH_ERROR) | |
4554 | return m; | |
4555 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
4556 | return MATCH_ERROR; | |
4557 | ||
4558 | if (gfc_add_interface (sym) == FAILURE) | |
4559 | return MATCH_ERROR; | |
4560 | ||
af1a34ee | 4561 | if (gfc_match_eos () == MATCH_YES) |
4562 | break; | |
4563 | if (gfc_match_char (',') != MATCH_YES) | |
4564 | goto syntax; | |
4565 | } | |
4566 | ||
4567 | return MATCH_YES; | |
4568 | ||
4569 | syntax: | |
4570 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4571 | return MATCH_ERROR; | |
4572 | } | |
4573 | ||
4574 | ||
4575 | /* General matcher for PROCEDURE declarations. */ | |
4576 | ||
7fd88f6e | 4577 | static match match_procedure_in_type (void); |
4578 | ||
af1a34ee | 4579 | match |
4580 | gfc_match_procedure (void) | |
4581 | { | |
4582 | match m; | |
4583 | ||
4584 | switch (gfc_current_state ()) | |
4585 | { | |
4586 | case COMP_NONE: | |
4587 | case COMP_PROGRAM: | |
4588 | case COMP_MODULE: | |
4589 | case COMP_SUBROUTINE: | |
4590 | case COMP_FUNCTION: | |
4591 | m = match_procedure_decl (); | |
4592 | break; | |
4593 | case COMP_INTERFACE: | |
4594 | m = match_procedure_in_interface (); | |
4595 | break; | |
4596 | case COMP_DERIVED: | |
64e93293 | 4597 | m = match_ppc_decl (); |
4598 | break; | |
7fd88f6e | 4599 | case COMP_DERIVED_CONTAINS: |
4600 | m = match_procedure_in_type (); | |
4601 | break; | |
af1a34ee | 4602 | default: |
4603 | return MATCH_NO; | |
4604 | } | |
4605 | ||
4606 | if (m != MATCH_YES) | |
4607 | return m; | |
4608 | ||
4609 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C") | |
4610 | == FAILURE) | |
4611 | return MATCH_ERROR; | |
4612 | ||
4613 | return m; | |
4614 | } | |
4615 | ||
4616 | ||
a34926ba | 4617 | /* Warn if a matched procedure has the same name as an intrinsic; this is |
4618 | simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current | |
4619 | parser-state-stack to find out whether we're in a module. */ | |
4620 | ||
4621 | static void | |
4622 | warn_intrinsic_shadow (const gfc_symbol* sym, bool func) | |
4623 | { | |
4624 | bool in_module; | |
4625 | ||
4626 | in_module = (gfc_state_stack->previous | |
4627 | && gfc_state_stack->previous->state == COMP_MODULE); | |
4628 | ||
4629 | gfc_warn_intrinsic_shadow (sym, in_module, func); | |
4630 | } | |
4631 | ||
4632 | ||
4ee9c684 | 4633 | /* Match a function declaration. */ |
4634 | ||
4635 | match | |
4636 | gfc_match_function_decl (void) | |
4637 | { | |
4638 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4639 | gfc_symbol *sym, *result; | |
4640 | locus old_loc; | |
4641 | match m; | |
c5d33754 | 4642 | match suffix_match; |
4643 | match found_match; /* Status returned by match func. */ | |
4ee9c684 | 4644 | |
4645 | if (gfc_current_state () != COMP_NONE | |
4646 | && gfc_current_state () != COMP_INTERFACE | |
4647 | && gfc_current_state () != COMP_CONTAINS) | |
4648 | return MATCH_NO; | |
4649 | ||
4650 | gfc_clear_ts (¤t_ts); | |
4651 | ||
cbb9e6aa | 4652 | old_loc = gfc_current_locus; |
4ee9c684 | 4653 | |
077932f9 | 4654 | m = gfc_match_prefix (¤t_ts); |
4ee9c684 | 4655 | if (m != MATCH_YES) |
4656 | { | |
cbb9e6aa | 4657 | gfc_current_locus = old_loc; |
4ee9c684 | 4658 | return m; |
4659 | } | |
4660 | ||
4661 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
4662 | { | |
cbb9e6aa | 4663 | gfc_current_locus = old_loc; |
4ee9c684 | 4664 | return MATCH_NO; |
4665 | } | |
d77f260f | 4666 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 4667 | return MATCH_ERROR; |
1e057e9b | 4668 | |
4669 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4670 | sym = sym->result; | |
4671 | ||
4ee9c684 | 4672 | gfc_new_block = sym; |
4673 | ||
4674 | m = gfc_match_formal_arglist (sym, 0, 0); | |
4675 | if (m == MATCH_NO) | |
9b435b6d | 4676 | { |
4677 | gfc_error ("Expected formal argument list in function " | |
1a9745d2 | 4678 | "definition at %C"); |
9b435b6d | 4679 | m = MATCH_ERROR; |
4680 | goto cleanup; | |
4681 | } | |
4ee9c684 | 4682 | else if (m == MATCH_ERROR) |
4683 | goto cleanup; | |
4684 | ||
4685 | result = NULL; | |
4686 | ||
c5d33754 | 4687 | /* According to the draft, the bind(c) and result clause can |
4688 | come in either order after the formal_arg_list (i.e., either | |
4689 | can be first, both can exist together or by themselves or neither | |
4690 | one). Therefore, the match_result can't match the end of the | |
4691 | string, and check for the bind(c) or result clause in either order. */ | |
4692 | found_match = gfc_match_eos (); | |
4693 | ||
4694 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
4695 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4696 | not allowed for procedures. */ | |
4697 | if (sym->attr.is_bind_c == 1) | |
4698 | { | |
4699 | sym->attr.is_bind_c = 0; | |
4700 | if (sym->old_symbol != NULL) | |
4701 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4702 | "variables or common blocks", | |
4703 | &(sym->old_symbol->declared_at)); | |
4704 | else | |
4705 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4706 | "variables or common blocks", &gfc_current_locus); | |
4ee9c684 | 4707 | } |
4708 | ||
c5d33754 | 4709 | if (found_match != MATCH_YES) |
4ee9c684 | 4710 | { |
c5d33754 | 4711 | /* If we haven't found the end-of-statement, look for a suffix. */ |
4712 | suffix_match = gfc_match_suffix (sym, &result); | |
4713 | if (suffix_match == MATCH_YES) | |
4714 | /* Need to get the eos now. */ | |
4715 | found_match = gfc_match_eos (); | |
4716 | else | |
4717 | found_match = suffix_match; | |
4ee9c684 | 4718 | } |
4719 | ||
c5d33754 | 4720 | if(found_match != MATCH_YES) |
4721 | m = MATCH_ERROR; | |
4ee9c684 | 4722 | else |
4723 | { | |
c5d33754 | 4724 | /* Make changes to the symbol. */ |
4725 | m = MATCH_ERROR; | |
4726 | ||
4727 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) | |
4728 | goto cleanup; | |
4729 | ||
4730 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
4731 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4732 | goto cleanup; | |
4ee9c684 | 4733 | |
8d39570e | 4734 | /* Delay matching the function characteristics until after the |
077932f9 | 4735 | specification block by signalling kind=-1. */ |
8d39570e | 4736 | sym->declared_at = old_loc; |
4737 | if (current_ts.type != BT_UNKNOWN) | |
4738 | current_ts.kind = -1; | |
4739 | else | |
4740 | current_ts.kind = 0; | |
077932f9 | 4741 | |
c5d33754 | 4742 | if (result == NULL) |
4743 | { | |
0477d42d | 4744 | if (current_ts.type != BT_UNKNOWN |
4745 | && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) | |
4746 | goto cleanup; | |
c5d33754 | 4747 | sym->result = sym; |
4748 | } | |
4749 | else | |
4750 | { | |
0477d42d | 4751 | if (current_ts.type != BT_UNKNOWN |
4752 | && gfc_add_type (result, ¤t_ts, &gfc_current_locus) | |
4753 | == FAILURE) | |
4754 | goto cleanup; | |
c5d33754 | 4755 | sym->result = result; |
4756 | } | |
4757 | ||
a34926ba | 4758 | /* Warn if this procedure has the same name as an intrinsic. */ |
4759 | warn_intrinsic_shadow (sym, true); | |
4760 | ||
c5d33754 | 4761 | return MATCH_YES; |
4762 | } | |
4ee9c684 | 4763 | |
4764 | cleanup: | |
cbb9e6aa | 4765 | gfc_current_locus = old_loc; |
4ee9c684 | 4766 | return m; |
4767 | } | |
4768 | ||
1a9745d2 | 4769 | |
4770 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
4771 | pass the name of the entry, rather than the gfc_current_block name, and | |
4772 | to return false upon finding an existing global entry. */ | |
858f9894 | 4773 | |
4774 | static bool | |
1a9745d2 | 4775 | add_global_entry (const char *name, int sub) |
858f9894 | 4776 | { |
4777 | gfc_gsymbol *s; | |
8458f4ca | 4778 | enum gfc_symbol_type type; |
858f9894 | 4779 | |
4780 | s = gfc_get_gsymbol(name); | |
5b11d932 | 4781 | type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; |
858f9894 | 4782 | |
4783 | if (s->defined | |
1a9745d2 | 4784 | || (s->type != GSYM_UNKNOWN |
5b11d932 | 4785 | && s->type != type)) |
cbbac028 | 4786 | gfc_global_used(s, NULL); |
858f9894 | 4787 | else |
4788 | { | |
5b11d932 | 4789 | s->type = type; |
858f9894 | 4790 | s->where = gfc_current_locus; |
4791 | s->defined = 1; | |
83aeedb9 | 4792 | s->ns = gfc_current_ns; |
858f9894 | 4793 | return true; |
4794 | } | |
4795 | return false; | |
4796 | } | |
4ee9c684 | 4797 | |
1a9745d2 | 4798 | |
4ee9c684 | 4799 | /* Match an ENTRY statement. */ |
4800 | ||
4801 | match | |
4802 | gfc_match_entry (void) | |
4803 | { | |
1b716045 | 4804 | gfc_symbol *proc; |
4805 | gfc_symbol *result; | |
4806 | gfc_symbol *entry; | |
4ee9c684 | 4807 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
4808 | gfc_compile_state state; | |
4809 | match m; | |
1b716045 | 4810 | gfc_entry_list *el; |
7b5e1acc | 4811 | locus old_loc; |
d77f260f | 4812 | bool module_procedure; |
86f0974b | 4813 | char peek_char; |
4814 | match is_bind_c; | |
4ee9c684 | 4815 | |
4816 | m = gfc_match_name (name); | |
4817 | if (m != MATCH_YES) | |
4818 | return m; | |
4819 | ||
1b716045 | 4820 | state = gfc_current_state (); |
ea37f786 | 4821 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
1b716045 | 4822 | { |
ea37f786 | 4823 | switch (state) |
4824 | { | |
4825 | case COMP_PROGRAM: | |
4826 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
4827 | break; | |
4828 | case COMP_MODULE: | |
4829 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
4830 | break; | |
4831 | case COMP_BLOCK_DATA: | |
1a9745d2 | 4832 | gfc_error ("ENTRY statement at %C cannot appear within " |
4833 | "a BLOCK DATA"); | |
ea37f786 | 4834 | break; |
4835 | case COMP_INTERFACE: | |
1a9745d2 | 4836 | gfc_error ("ENTRY statement at %C cannot appear within " |
4837 | "an INTERFACE"); | |
ea37f786 | 4838 | break; |
4839 | case COMP_DERIVED: | |
1a9745d2 | 4840 | gfc_error ("ENTRY statement at %C cannot appear within " |
4841 | "a DERIVED TYPE block"); | |
ea37f786 | 4842 | break; |
4843 | case COMP_IF: | |
1a9745d2 | 4844 | gfc_error ("ENTRY statement at %C cannot appear within " |
4845 | "an IF-THEN block"); | |
ea37f786 | 4846 | break; |
4847 | case COMP_DO: | |
1a9745d2 | 4848 | gfc_error ("ENTRY statement at %C cannot appear within " |
4849 | "a DO block"); | |
ea37f786 | 4850 | break; |
4851 | case COMP_SELECT: | |
1a9745d2 | 4852 | gfc_error ("ENTRY statement at %C cannot appear within " |
4853 | "a SELECT block"); | |
ea37f786 | 4854 | break; |
4855 | case COMP_FORALL: | |
1a9745d2 | 4856 | gfc_error ("ENTRY statement at %C cannot appear within " |
4857 | "a FORALL block"); | |
ea37f786 | 4858 | break; |
4859 | case COMP_WHERE: | |
1a9745d2 | 4860 | gfc_error ("ENTRY statement at %C cannot appear within " |
4861 | "a WHERE block"); | |
ea37f786 | 4862 | break; |
4863 | case COMP_CONTAINS: | |
1a9745d2 | 4864 | gfc_error ("ENTRY statement at %C cannot appear within " |
4865 | "a contained subprogram"); | |
ea37f786 | 4866 | break; |
4867 | default: | |
4868 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
4869 | } | |
1b716045 | 4870 | return MATCH_ERROR; |
4871 | } | |
4872 | ||
d77f260f | 4873 | module_procedure = gfc_current_ns->parent != NULL |
1a9745d2 | 4874 | && gfc_current_ns->parent->proc_name |
4875 | && gfc_current_ns->parent->proc_name->attr.flavor | |
4876 | == FL_MODULE; | |
d77f260f | 4877 | |
1b716045 | 4878 | if (gfc_current_ns->parent != NULL |
4879 | && gfc_current_ns->parent->proc_name | |
d77f260f | 4880 | && !module_procedure) |
1b716045 | 4881 | { |
4882 | gfc_error("ENTRY statement at %C cannot appear in a " | |
4883 | "contained procedure"); | |
4884 | return MATCH_ERROR; | |
4885 | } | |
4886 | ||
d77f260f | 4887 | /* Module function entries need special care in get_proc_name |
4888 | because previous references within the function will have | |
4889 | created symbols attached to the current namespace. */ | |
4890 | if (get_proc_name (name, &entry, | |
4891 | gfc_current_ns->parent != NULL | |
c1e4695a | 4892 | && module_procedure)) |
4ee9c684 | 4893 | return MATCH_ERROR; |
4894 | ||
1b716045 | 4895 | proc = gfc_current_block (); |
4896 | ||
86f0974b | 4897 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
4898 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4899 | not allowed for procedures. */ | |
4900 | if (entry->attr.is_bind_c == 1) | |
4901 | { | |
4902 | entry->attr.is_bind_c = 0; | |
4903 | if (entry->old_symbol != NULL) | |
4904 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4905 | "variables or common blocks", | |
4906 | &(entry->old_symbol->declared_at)); | |
4907 | else | |
4908 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4909 | "variables or common blocks", &gfc_current_locus); | |
4910 | } | |
4911 | ||
4912 | /* Check what next non-whitespace character is so we can tell if there | |
4913 | is the required parens if we have a BIND(C). */ | |
4914 | gfc_gobble_whitespace (); | |
e0be6f02 | 4915 | peek_char = gfc_peek_ascii_char (); |
86f0974b | 4916 | |
1b716045 | 4917 | if (state == COMP_SUBROUTINE) |
4ee9c684 | 4918 | { |
950683ed | 4919 | /* An entry in a subroutine. */ |
8cafc742 | 4920 | if (!gfc_current_ns->parent && !add_global_entry (name, 1)) |
858f9894 | 4921 | return MATCH_ERROR; |
4922 | ||
4ee9c684 | 4923 | m = gfc_match_formal_arglist (entry, 0, 1); |
4924 | if (m != MATCH_YES) | |
4925 | return MATCH_ERROR; | |
4926 | ||
75ae7f6c | 4927 | /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can |
4928 | never be an internal procedure. */ | |
4929 | is_bind_c = gfc_match_bind_c (entry, true); | |
86f0974b | 4930 | if (is_bind_c == MATCH_ERROR) |
4931 | return MATCH_ERROR; | |
4932 | if (is_bind_c == MATCH_YES) | |
4933 | { | |
4934 | if (peek_char != '(') | |
4935 | { | |
4936 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
4937 | return MATCH_ERROR; | |
4938 | } | |
4939 | if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1) | |
4940 | == FAILURE) | |
4941 | return MATCH_ERROR; | |
4942 | } | |
4943 | ||
950683ed | 4944 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4945 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 4946 | return MATCH_ERROR; |
1b716045 | 4947 | } |
4948 | else | |
4949 | { | |
7b5e1acc | 4950 | /* An entry in a function. |
1a9745d2 | 4951 | We need to take special care because writing |
4952 | ENTRY f() | |
4953 | as | |
4954 | ENTRY f | |
4955 | is allowed, whereas | |
4956 | ENTRY f() RESULT (r) | |
4957 | can't be written as | |
4958 | ENTRY f RESULT (r). */ | |
8cafc742 | 4959 | if (!gfc_current_ns->parent && !add_global_entry (name, 0)) |
858f9894 | 4960 | return MATCH_ERROR; |
4961 | ||
7b5e1acc | 4962 | old_loc = gfc_current_locus; |
4963 | if (gfc_match_eos () == MATCH_YES) | |
4964 | { | |
4965 | gfc_current_locus = old_loc; | |
4966 | /* Match the empty argument list, and add the interface to | |
4967 | the symbol. */ | |
4968 | m = gfc_match_formal_arglist (entry, 0, 1); | |
4969 | } | |
4970 | else | |
4971 | m = gfc_match_formal_arglist (entry, 0, 0); | |
4972 | ||
4ee9c684 | 4973 | if (m != MATCH_YES) |
4974 | return MATCH_ERROR; | |
4975 | ||
4ee9c684 | 4976 | result = NULL; |
4977 | ||
4978 | if (gfc_match_eos () == MATCH_YES) | |
4979 | { | |
950683ed | 4980 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4981 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 4982 | return MATCH_ERROR; |
4983 | ||
c6871095 | 4984 | entry->result = entry; |
4ee9c684 | 4985 | } |
4986 | else | |
4987 | { | |
86f0974b | 4988 | m = gfc_match_suffix (entry, &result); |
4ee9c684 | 4989 | if (m == MATCH_NO) |
4990 | gfc_syntax_error (ST_ENTRY); | |
4991 | if (m != MATCH_YES) | |
4992 | return MATCH_ERROR; | |
4993 | ||
86f0974b | 4994 | if (result) |
4995 | { | |
4996 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE | |
4997 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
4998 | || gfc_add_function (&entry->attr, result->name, NULL) | |
4999 | == FAILURE) | |
5000 | return MATCH_ERROR; | |
5001 | entry->result = result; | |
5002 | } | |
5003 | else | |
5004 | { | |
5005 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE | |
5006 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
5007 | return MATCH_ERROR; | |
5008 | entry->result = entry; | |
5009 | } | |
4ee9c684 | 5010 | } |
4ee9c684 | 5011 | } |
5012 | ||
5013 | if (gfc_match_eos () != MATCH_YES) | |
5014 | { | |
5015 | gfc_syntax_error (ST_ENTRY); | |
5016 | return MATCH_ERROR; | |
5017 | } | |
5018 | ||
1b716045 | 5019 | entry->attr.recursive = proc->attr.recursive; |
5020 | entry->attr.elemental = proc->attr.elemental; | |
5021 | entry->attr.pure = proc->attr.pure; | |
4ee9c684 | 5022 | |
1b716045 | 5023 | el = gfc_get_entry_list (); |
5024 | el->sym = entry; | |
5025 | el->next = gfc_current_ns->entries; | |
5026 | gfc_current_ns->entries = el; | |
5027 | if (el->next) | |
5028 | el->id = el->next->id + 1; | |
5029 | else | |
5030 | el->id = 1; | |
4ee9c684 | 5031 | |
1b716045 | 5032 | new_st.op = EXEC_ENTRY; |
5033 | new_st.ext.entry = el; | |
5034 | ||
5035 | return MATCH_YES; | |
4ee9c684 | 5036 | } |
5037 | ||
5038 | ||
5039 | /* Match a subroutine statement, including optional prefixes. */ | |
5040 | ||
5041 | match | |
5042 | gfc_match_subroutine (void) | |
5043 | { | |
5044 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5045 | gfc_symbol *sym; | |
5046 | match m; | |
c5d33754 | 5047 | match is_bind_c; |
5048 | char peek_char; | |
75ae7f6c | 5049 | bool allow_binding_name; |
4ee9c684 | 5050 | |
5051 | if (gfc_current_state () != COMP_NONE | |
5052 | && gfc_current_state () != COMP_INTERFACE | |
5053 | && gfc_current_state () != COMP_CONTAINS) | |
5054 | return MATCH_NO; | |
5055 | ||
077932f9 | 5056 | m = gfc_match_prefix (NULL); |
4ee9c684 | 5057 | if (m != MATCH_YES) |
5058 | return m; | |
5059 | ||
5060 | m = gfc_match ("subroutine% %n", name); | |
5061 | if (m != MATCH_YES) | |
5062 | return m; | |
5063 | ||
d77f260f | 5064 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 5065 | return MATCH_ERROR; |
1e057e9b | 5066 | |
5067 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
5068 | sym = sym->result; | |
5069 | ||
4ee9c684 | 5070 | gfc_new_block = sym; |
5071 | ||
c5d33754 | 5072 | /* Check what next non-whitespace character is so we can tell if there |
86f0974b | 5073 | is the required parens if we have a BIND(C). */ |
c5d33754 | 5074 | gfc_gobble_whitespace (); |
e0be6f02 | 5075 | peek_char = gfc_peek_ascii_char (); |
c5d33754 | 5076 | |
950683ed | 5077 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
4ee9c684 | 5078 | return MATCH_ERROR; |
5079 | ||
5080 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
5081 | return MATCH_ERROR; | |
5082 | ||
c5d33754 | 5083 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
5084 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
5085 | not allowed for procedures. */ | |
5086 | if (sym->attr.is_bind_c == 1) | |
5087 | { | |
5088 | sym->attr.is_bind_c = 0; | |
5089 | if (sym->old_symbol != NULL) | |
5090 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5091 | "variables or common blocks", | |
5092 | &(sym->old_symbol->declared_at)); | |
5093 | else | |
5094 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5095 | "variables or common blocks", &gfc_current_locus); | |
5096 | } | |
75ae7f6c | 5097 | |
5098 | /* C binding names are not allowed for internal procedures. */ | |
5099 | if (gfc_current_state () == COMP_CONTAINS | |
5100 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
5101 | allow_binding_name = false; | |
5102 | else | |
5103 | allow_binding_name = true; | |
5104 | ||
c5d33754 | 5105 | /* Here, we are just checking if it has the bind(c) attribute, and if |
5106 | so, then we need to make sure it's all correct. If it doesn't, | |
5107 | we still need to continue matching the rest of the subroutine line. */ | |
75ae7f6c | 5108 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 5109 | if (is_bind_c == MATCH_ERROR) |
5110 | { | |
5111 | /* There was an attempt at the bind(c), but it was wrong. An | |
5112 | error message should have been printed w/in the gfc_match_bind_c | |
5113 | so here we'll just return the MATCH_ERROR. */ | |
5114 | return MATCH_ERROR; | |
5115 | } | |
5116 | ||
5117 | if (is_bind_c == MATCH_YES) | |
5118 | { | |
75ae7f6c | 5119 | /* The following is allowed in the Fortran 2008 draft. */ |
4518e961 | 5120 | if (gfc_current_state () == COMP_CONTAINS |
75ae7f6c | 5121 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
2dcae6c7 | 5122 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
5123 | "at %L may not be specified for an internal " | |
5124 | "procedure", &gfc_current_locus) | |
75ae7f6c | 5125 | == FAILURE) |
5126 | return MATCH_ERROR; | |
5127 | ||
c5d33754 | 5128 | if (peek_char != '(') |
5129 | { | |
5130 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
5131 | return MATCH_ERROR; | |
5132 | } | |
5133 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) | |
5134 | == FAILURE) | |
5135 | return MATCH_ERROR; | |
5136 | } | |
5137 | ||
4ee9c684 | 5138 | if (gfc_match_eos () != MATCH_YES) |
5139 | { | |
5140 | gfc_syntax_error (ST_SUBROUTINE); | |
5141 | return MATCH_ERROR; | |
5142 | } | |
5143 | ||
5144 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
5145 | return MATCH_ERROR; | |
5146 | ||
a34926ba | 5147 | /* Warn if it has the same name as an intrinsic. */ |
5148 | warn_intrinsic_shadow (sym, false); | |
5149 | ||
4ee9c684 | 5150 | return MATCH_YES; |
5151 | } | |
5152 | ||
5153 | ||
c5d33754 | 5154 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
5155 | given, and set the binding label in either the given symbol (if not | |
a0527218 | 5156 | NULL), or in the current_ts. The symbol may be NULL because we may |
c5d33754 | 5157 | encounter the BIND(C) before the declaration itself. Return |
5158 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, | |
5159 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, | |
5160 | or MATCH_YES if the specifier was correct and the binding label and | |
5161 | bind(c) fields were set correctly for the given symbol or the | |
75ae7f6c | 5162 | current_ts. If allow_binding_name is false, no binding name may be |
5163 | given. */ | |
c5d33754 | 5164 | |
5165 | match | |
75ae7f6c | 5166 | gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name) |
c5d33754 | 5167 | { |
5168 | /* binding label, if exists */ | |
5169 | char binding_label[GFC_MAX_SYMBOL_LEN + 1]; | |
5170 | match double_quote; | |
5171 | match single_quote; | |
c5d33754 | 5172 | |
5173 | /* Initialize the flag that specifies whether we encountered a NAME= | |
5174 | specifier or not. */ | |
5175 | has_name_equals = 0; | |
5176 | ||
5177 | /* Init the first char to nil so we can catch if we don't have | |
5178 | the label (name attr) or the symbol name yet. */ | |
5179 | binding_label[0] = '\0'; | |
5180 | ||
5181 | /* This much we have to be able to match, in this order, if | |
5182 | there is a bind(c) label. */ | |
5183 | if (gfc_match (" bind ( c ") != MATCH_YES) | |
5184 | return MATCH_NO; | |
5185 | ||
5186 | /* Now see if there is a binding label, or if we've reached the | |
5187 | end of the bind(c) attribute without one. */ | |
5188 | if (gfc_match_char (',') == MATCH_YES) | |
5189 | { | |
5190 | if (gfc_match (" name = ") != MATCH_YES) | |
5191 | { | |
5192 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5193 | "at %C"); | |
5194 | /* should give an error message here */ | |
5195 | return MATCH_ERROR; | |
5196 | } | |
5197 | ||
5198 | has_name_equals = 1; | |
5199 | ||
5200 | /* Get the opening quote. */ | |
5201 | double_quote = MATCH_YES; | |
5202 | single_quote = MATCH_YES; | |
5203 | double_quote = gfc_match_char ('"'); | |
5204 | if (double_quote != MATCH_YES) | |
5205 | single_quote = gfc_match_char ('\''); | |
5206 | if (double_quote != MATCH_YES && single_quote != MATCH_YES) | |
5207 | { | |
5208 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5209 | "at %C"); | |
5210 | return MATCH_ERROR; | |
5211 | } | |
5212 | ||
5213 | /* Grab the binding label, using functions that will not lower | |
5214 | case the names automatically. */ | |
5215 | if (gfc_match_name_C (binding_label) != MATCH_YES) | |
5216 | return MATCH_ERROR; | |
5217 | ||
5218 | /* Get the closing quotation. */ | |
5219 | if (double_quote == MATCH_YES) | |
5220 | { | |
5221 | if (gfc_match_char ('"') != MATCH_YES) | |
5222 | { | |
5223 | gfc_error ("Missing closing quote '\"' for binding label at %C"); | |
5224 | /* User started string with '"' so looked to match it. */ | |
5225 | return MATCH_ERROR; | |
5226 | } | |
5227 | } | |
5228 | else | |
5229 | { | |
5230 | if (gfc_match_char ('\'') != MATCH_YES) | |
5231 | { | |
5232 | gfc_error ("Missing closing quote '\'' for binding label at %C"); | |
5233 | /* User started string with "'" char. */ | |
5234 | return MATCH_ERROR; | |
5235 | } | |
5236 | } | |
5237 | } | |
5238 | ||
5239 | /* Get the required right paren. */ | |
5240 | if (gfc_match_char (')') != MATCH_YES) | |
5241 | { | |
5242 | gfc_error ("Missing closing paren for binding label at %C"); | |
5243 | return MATCH_ERROR; | |
5244 | } | |
5245 | ||
75ae7f6c | 5246 | if (has_name_equals && !allow_binding_name) |
5247 | { | |
5248 | gfc_error ("No binding name is allowed in BIND(C) at %C"); | |
5249 | return MATCH_ERROR; | |
5250 | } | |
5251 | ||
5252 | if (has_name_equals && sym != NULL && sym->attr.dummy) | |
5253 | { | |
5254 | gfc_error ("For dummy procedure %s, no binding name is " | |
5255 | "allowed in BIND(C) at %C", sym->name); | |
5256 | return MATCH_ERROR; | |
5257 | } | |
5258 | ||
5259 | ||
c5d33754 | 5260 | /* Save the binding label to the symbol. If sym is null, we're |
5261 | probably matching the typespec attributes of a declaration and | |
5262 | haven't gotten the name yet, and therefore, no symbol yet. */ | |
5263 | if (binding_label[0] != '\0') | |
5264 | { | |
5265 | if (sym != NULL) | |
5266 | { | |
b1223b39 | 5267 | strcpy (sym->binding_label, binding_label); |
c5d33754 | 5268 | } |
5269 | else | |
b1223b39 | 5270 | strcpy (curr_binding_label, binding_label); |
c5d33754 | 5271 | } |
75ae7f6c | 5272 | else if (allow_binding_name) |
c5d33754 | 5273 | { |
5274 | /* No binding label, but if symbol isn't null, we | |
75ae7f6c | 5275 | can set the label for it here. |
5276 | If name="" or allow_binding_name is false, no C binding name is | |
5277 | created. */ | |
c5d33754 | 5278 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) |
5279 | strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1); | |
5280 | } | |
94fa7146 | 5281 | |
5cf92482 | 5282 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
5283 | && current_interface.type == INTERFACE_ABSTRACT) | |
94fa7146 | 5284 | { |
5285 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); | |
5286 | return MATCH_ERROR; | |
5287 | } | |
5288 | ||
c5d33754 | 5289 | return MATCH_YES; |
5290 | } | |
5291 | ||
5292 | ||
231e961a | 5293 | /* Return nonzero if we're currently compiling a contained procedure. */ |
c0985832 | 5294 | |
5295 | static int | |
5296 | contained_procedure (void) | |
5297 | { | |
1c343287 | 5298 | gfc_state_data *s = gfc_state_stack; |
c0985832 | 5299 | |
1c343287 | 5300 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) |
5301 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) | |
5302 | return 1; | |
c0985832 | 5303 | |
5304 | return 0; | |
5305 | } | |
5306 | ||
e14bee04 | 5307 | /* Set the kind of each enumerator. The kind is selected such that it is |
3b6a4b41 | 5308 | interoperable with the corresponding C enumeration type, making |
5309 | sure that -fshort-enums is honored. */ | |
5310 | ||
5311 | static void | |
5312 | set_enum_kind(void) | |
5313 | { | |
5314 | enumerator_history *current_history = NULL; | |
5315 | int kind; | |
5316 | int i; | |
5317 | ||
5318 | if (max_enum == NULL || enum_history == NULL) | |
5319 | return; | |
5320 | ||
6f092e31 | 5321 | if (!flag_short_enums) |
e14bee04 | 5322 | return; |
5323 | ||
3b6a4b41 | 5324 | i = 0; |
5325 | do | |
5326 | { | |
5327 | kind = gfc_integer_kinds[i++].kind; | |
5328 | } | |
e14bee04 | 5329 | while (kind < gfc_c_int_kind |
3b6a4b41 | 5330 | && gfc_check_integer_range (max_enum->initializer->value.integer, |
5331 | kind) != ARITH_OK); | |
5332 | ||
5333 | current_history = enum_history; | |
5334 | while (current_history != NULL) | |
5335 | { | |
5336 | current_history->sym->ts.kind = kind; | |
5337 | current_history = current_history->next; | |
5338 | } | |
5339 | } | |
5340 | ||
1a9745d2 | 5341 | |
4ee9c684 | 5342 | /* Match any of the various end-block statements. Returns the type of |
5343 | END to the caller. The END INTERFACE, END IF, END DO and END | |
5344 | SELECT statements cannot be replaced by a single END statement. */ | |
5345 | ||
5346 | match | |
1a9745d2 | 5347 | gfc_match_end (gfc_statement *st) |
4ee9c684 | 5348 | { |
5349 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5350 | gfc_compile_state state; | |
5351 | locus old_loc; | |
5352 | const char *block_name; | |
5353 | const char *target; | |
c0985832 | 5354 | int eos_ok; |
4ee9c684 | 5355 | match m; |
5356 | ||
cbb9e6aa | 5357 | old_loc = gfc_current_locus; |
4ee9c684 | 5358 | if (gfc_match ("end") != MATCH_YES) |
5359 | return MATCH_NO; | |
5360 | ||
5361 | state = gfc_current_state (); | |
1a9745d2 | 5362 | block_name = gfc_current_block () == NULL |
5363 | ? NULL : gfc_current_block ()->name; | |
4ee9c684 | 5364 | |
7fd88f6e | 5365 | if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS) |
4ee9c684 | 5366 | { |
5367 | state = gfc_state_stack->previous->state; | |
1a9745d2 | 5368 | block_name = gfc_state_stack->previous->sym == NULL |
5369 | ? NULL : gfc_state_stack->previous->sym->name; | |
4ee9c684 | 5370 | } |
5371 | ||
5372 | switch (state) | |
5373 | { | |
5374 | case COMP_NONE: | |
5375 | case COMP_PROGRAM: | |
5376 | *st = ST_END_PROGRAM; | |
5377 | target = " program"; | |
c0985832 | 5378 | eos_ok = 1; |
4ee9c684 | 5379 | break; |
5380 | ||
5381 | case COMP_SUBROUTINE: | |
5382 | *st = ST_END_SUBROUTINE; | |
5383 | target = " subroutine"; | |
c0985832 | 5384 | eos_ok = !contained_procedure (); |
4ee9c684 | 5385 | break; |
5386 | ||
5387 | case COMP_FUNCTION: | |
5388 | *st = ST_END_FUNCTION; | |
5389 | target = " function"; | |
c0985832 | 5390 | eos_ok = !contained_procedure (); |
4ee9c684 | 5391 | break; |
5392 | ||
5393 | case COMP_BLOCK_DATA: | |
5394 | *st = ST_END_BLOCK_DATA; | |
5395 | target = " block data"; | |
c0985832 | 5396 | eos_ok = 1; |
4ee9c684 | 5397 | break; |
5398 | ||
5399 | case COMP_MODULE: | |
5400 | *st = ST_END_MODULE; | |
5401 | target = " module"; | |
c0985832 | 5402 | eos_ok = 1; |
4ee9c684 | 5403 | break; |
5404 | ||
5405 | case COMP_INTERFACE: | |
5406 | *st = ST_END_INTERFACE; | |
5407 | target = " interface"; | |
c0985832 | 5408 | eos_ok = 0; |
4ee9c684 | 5409 | break; |
5410 | ||
5411 | case COMP_DERIVED: | |
7fd88f6e | 5412 | case COMP_DERIVED_CONTAINS: |
4ee9c684 | 5413 | *st = ST_END_TYPE; |
5414 | target = " type"; | |
c0985832 | 5415 | eos_ok = 0; |
4ee9c684 | 5416 | break; |
5417 | ||
5418 | case COMP_IF: | |
5419 | *st = ST_ENDIF; | |
5420 | target = " if"; | |
c0985832 | 5421 | eos_ok = 0; |
4ee9c684 | 5422 | break; |
5423 | ||
5424 | case COMP_DO: | |
5425 | *st = ST_ENDDO; | |
5426 | target = " do"; | |
c0985832 | 5427 | eos_ok = 0; |
4ee9c684 | 5428 | break; |
5429 | ||
5430 | case COMP_SELECT: | |
5431 | *st = ST_END_SELECT; | |
5432 | target = " select"; | |
c0985832 | 5433 | eos_ok = 0; |
4ee9c684 | 5434 | break; |
5435 | ||
5436 | case COMP_FORALL: | |
5437 | *st = ST_END_FORALL; | |
5438 | target = " forall"; | |
c0985832 | 5439 | eos_ok = 0; |
4ee9c684 | 5440 | break; |
5441 | ||
5442 | case COMP_WHERE: | |
5443 | *st = ST_END_WHERE; | |
5444 | target = " where"; | |
c0985832 | 5445 | eos_ok = 0; |
4ee9c684 | 5446 | break; |
5447 | ||
3b6a4b41 | 5448 | case COMP_ENUM: |
5449 | *st = ST_END_ENUM; | |
5450 | target = " enum"; | |
5451 | eos_ok = 0; | |
5452 | last_initializer = NULL; | |
5453 | set_enum_kind (); | |
5454 | gfc_free_enum_history (); | |
5455 | break; | |
5456 | ||
4ee9c684 | 5457 | default: |
5458 | gfc_error ("Unexpected END statement at %C"); | |
5459 | goto cleanup; | |
5460 | } | |
5461 | ||
5462 | if (gfc_match_eos () == MATCH_YES) | |
5463 | { | |
c0985832 | 5464 | if (!eos_ok) |
4ee9c684 | 5465 | { |
f6d0e37a | 5466 | /* We would have required END [something]. */ |
d197c9ee | 5467 | gfc_error ("%s statement expected at %L", |
5468 | gfc_ascii_statement (*st), &old_loc); | |
4ee9c684 | 5469 | goto cleanup; |
5470 | } | |
5471 | ||
5472 | return MATCH_YES; | |
5473 | } | |
5474 | ||
5475 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
5476 | if (gfc_match (target) != MATCH_YES) | |
5477 | { | |
5478 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
5479 | goto cleanup; | |
5480 | } | |
5481 | ||
5482 | /* If we're at the end, make sure a block name wasn't required. */ | |
5483 | if (gfc_match_eos () == MATCH_YES) | |
5484 | { | |
5485 | ||
0d0ce415 | 5486 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT |
5487 | && *st != ST_END_FORALL && *st != ST_END_WHERE) | |
4ee9c684 | 5488 | return MATCH_YES; |
5489 | ||
5490 | if (gfc_current_block () == NULL) | |
5491 | return MATCH_YES; | |
5492 | ||
5493 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
5494 | block_name, gfc_ascii_statement (*st)); | |
5495 | ||
5496 | return MATCH_ERROR; | |
5497 | } | |
5498 | ||
5499 | /* END INTERFACE has a special handler for its several possible endings. */ | |
5500 | if (*st == ST_END_INTERFACE) | |
5501 | return gfc_match_end_interface (); | |
5502 | ||
f6d0e37a | 5503 | /* We haven't hit the end of statement, so what is left must be an |
5504 | end-name. */ | |
4ee9c684 | 5505 | m = gfc_match_space (); |
5506 | if (m == MATCH_YES) | |
5507 | m = gfc_match_name (name); | |
5508 | ||
5509 | if (m == MATCH_NO) | |
5510 | gfc_error ("Expected terminating name at %C"); | |
5511 | if (m != MATCH_YES) | |
5512 | goto cleanup; | |
5513 | ||
5514 | if (block_name == NULL) | |
5515 | goto syntax; | |
5516 | ||
1e057e9b | 5517 | if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0) |
4ee9c684 | 5518 | { |
5519 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
5520 | gfc_ascii_statement (*st)); | |
5521 | goto cleanup; | |
5522 | } | |
1e057e9b | 5523 | /* Procedure pointer as function result. */ |
5524 | else if (strcmp (block_name, "ppr@") == 0 | |
5525 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0) | |
5526 | { | |
5527 | gfc_error ("Expected label '%s' for %s statement at %C", | |
5528 | gfc_current_block ()->ns->proc_name->name, | |
5529 | gfc_ascii_statement (*st)); | |
5530 | goto cleanup; | |
5531 | } | |
4ee9c684 | 5532 | |
5533 | if (gfc_match_eos () == MATCH_YES) | |
5534 | return MATCH_YES; | |
5535 | ||
5536 | syntax: | |
5537 | gfc_syntax_error (*st); | |
5538 | ||
5539 | cleanup: | |
cbb9e6aa | 5540 | gfc_current_locus = old_loc; |
4ee9c684 | 5541 | return MATCH_ERROR; |
5542 | } | |
5543 | ||
5544 | ||
5545 | ||
5546 | /***************** Attribute declaration statements ****************/ | |
5547 | ||
5548 | /* Set the attribute of a single variable. */ | |
5549 | ||
5550 | static match | |
5551 | attr_decl1 (void) | |
5552 | { | |
5553 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5554 | gfc_array_spec *as; | |
5555 | gfc_symbol *sym; | |
5556 | locus var_locus; | |
5557 | match m; | |
5558 | ||
5559 | as = NULL; | |
5560 | ||
5561 | m = gfc_match_name (name); | |
5562 | if (m != MATCH_YES) | |
5563 | goto cleanup; | |
5564 | ||
36b0a1b0 | 5565 | if (find_special (name, &sym, false)) |
4ee9c684 | 5566 | return MATCH_ERROR; |
5567 | ||
cbb9e6aa | 5568 | var_locus = gfc_current_locus; |
4ee9c684 | 5569 | |
5570 | /* Deal with possible array specification for certain attributes. */ | |
5571 | if (current_attr.dimension | |
5572 | || current_attr.allocatable | |
5573 | || current_attr.pointer | |
5574 | || current_attr.target) | |
5575 | { | |
5576 | m = gfc_match_array_spec (&as); | |
5577 | if (m == MATCH_ERROR) | |
5578 | goto cleanup; | |
5579 | ||
5580 | if (current_attr.dimension && m == MATCH_NO) | |
5581 | { | |
1a9745d2 | 5582 | gfc_error ("Missing array specification at %L in DIMENSION " |
5583 | "statement", &var_locus); | |
4ee9c684 | 5584 | m = MATCH_ERROR; |
5585 | goto cleanup; | |
5586 | } | |
5587 | ||
13aebeb0 | 5588 | if (current_attr.dimension && sym->value) |
5589 | { | |
5590 | gfc_error ("Dimensions specified for %s at %L after its " | |
5591 | "initialisation", sym->name, &var_locus); | |
5592 | m = MATCH_ERROR; | |
5593 | goto cleanup; | |
5594 | } | |
5595 | ||
4ee9c684 | 5596 | if ((current_attr.allocatable || current_attr.pointer) |
5597 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
5598 | { | |
1a9745d2 | 5599 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
4ee9c684 | 5600 | m = MATCH_ERROR; |
5601 | goto cleanup; | |
5602 | } | |
5603 | } | |
5604 | ||
1a9745d2 | 5605 | /* Update symbol table. DIMENSION attribute is set |
5606 | in gfc_set_array_spec(). */ | |
4ee9c684 | 5607 | if (current_attr.dimension == 0 |
63986dfb | 5608 | && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE) |
4ee9c684 | 5609 | { |
5610 | m = MATCH_ERROR; | |
5611 | goto cleanup; | |
5612 | } | |
5613 | ||
5614 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
5615 | { | |
5616 | m = MATCH_ERROR; | |
5617 | goto cleanup; | |
5618 | } | |
e14bee04 | 5619 | |
b549d2a5 | 5620 | if (sym->attr.cray_pointee && sym->as != NULL) |
5621 | { | |
5622 | /* Fix the array spec. */ | |
5623 | m = gfc_mod_pointee_as (sym->as); | |
5624 | if (m == MATCH_ERROR) | |
5625 | goto cleanup; | |
5626 | } | |
4ee9c684 | 5627 | |
25dd7350 | 5628 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
14efb9b7 | 5629 | { |
5630 | m = MATCH_ERROR; | |
5631 | goto cleanup; | |
5632 | } | |
5633 | ||
4ee9c684 | 5634 | if ((current_attr.external || current_attr.intrinsic) |
5635 | && sym->attr.flavor != FL_PROCEDURE | |
950683ed | 5636 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
4ee9c684 | 5637 | { |
5638 | m = MATCH_ERROR; | |
5639 | goto cleanup; | |
5640 | } | |
5641 | ||
1e057e9b | 5642 | add_hidden_procptr_result (sym); |
5643 | ||
4ee9c684 | 5644 | return MATCH_YES; |
5645 | ||
5646 | cleanup: | |
5647 | gfc_free_array_spec (as); | |
5648 | return m; | |
5649 | } | |
5650 | ||
5651 | ||
5652 | /* Generic attribute declaration subroutine. Used for attributes that | |
5653 | just have a list of names. */ | |
5654 | ||
5655 | static match | |
5656 | attr_decl (void) | |
5657 | { | |
5658 | match m; | |
5659 | ||
5660 | /* Gobble the optional double colon, by simply ignoring the result | |
5661 | of gfc_match(). */ | |
5662 | gfc_match (" ::"); | |
5663 | ||
5664 | for (;;) | |
5665 | { | |
5666 | m = attr_decl1 (); | |
5667 | if (m != MATCH_YES) | |
5668 | break; | |
5669 | ||
5670 | if (gfc_match_eos () == MATCH_YES) | |
5671 | { | |
5672 | m = MATCH_YES; | |
5673 | break; | |
5674 | } | |
5675 | ||
5676 | if (gfc_match_char (',') != MATCH_YES) | |
5677 | { | |
5678 | gfc_error ("Unexpected character in variable list at %C"); | |
5679 | m = MATCH_ERROR; | |
5680 | break; | |
5681 | } | |
5682 | } | |
5683 | ||
5684 | return m; | |
5685 | } | |
5686 | ||
5687 | ||
b549d2a5 | 5688 | /* This routine matches Cray Pointer declarations of the form: |
5689 | pointer ( <pointer>, <pointee> ) | |
5690 | or | |
e14bee04 | 5691 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
5692 | The pointer, if already declared, should be an integer. Otherwise, we | |
b549d2a5 | 5693 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
5694 | be either a scalar, or an array declaration. No space is allocated for | |
e14bee04 | 5695 | the pointee. For the statement |
b549d2a5 | 5696 | pointer (ipt, ar(10)) |
5697 | any subsequent uses of ar will be translated (in C-notation) as | |
e14bee04 | 5698 | ar(i) => ((<type> *) ipt)(i) |
b7bf3f81 | 5699 | After gimplification, pointee variable will disappear in the code. */ |
b549d2a5 | 5700 | |
5701 | static match | |
5702 | cray_pointer_decl (void) | |
5703 | { | |
5704 | match m; | |
5705 | gfc_array_spec *as; | |
5706 | gfc_symbol *cptr; /* Pointer symbol. */ | |
5707 | gfc_symbol *cpte; /* Pointee symbol. */ | |
5708 | locus var_locus; | |
5709 | bool done = false; | |
5710 | ||
5711 | while (!done) | |
5712 | { | |
5713 | if (gfc_match_char ('(') != MATCH_YES) | |
5714 | { | |
5715 | gfc_error ("Expected '(' at %C"); | |
e14bee04 | 5716 | return MATCH_ERROR; |
b549d2a5 | 5717 | } |
e14bee04 | 5718 | |
b549d2a5 | 5719 | /* Match pointer. */ |
5720 | var_locus = gfc_current_locus; | |
5721 | gfc_clear_attr (¤t_attr); | |
5722 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
5723 | current_ts.type = BT_INTEGER; | |
5724 | current_ts.kind = gfc_index_integer_kind; | |
5725 | ||
e14bee04 | 5726 | m = gfc_match_symbol (&cptr, 0); |
b549d2a5 | 5727 | if (m != MATCH_YES) |
5728 | { | |
5729 | gfc_error ("Expected variable name at %C"); | |
5730 | return m; | |
5731 | } | |
e14bee04 | 5732 | |
b549d2a5 | 5733 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) |
5734 | return MATCH_ERROR; | |
5735 | ||
e14bee04 | 5736 | gfc_set_sym_referenced (cptr); |
b549d2a5 | 5737 | |
5738 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
5739 | { | |
5740 | cptr->ts.type = BT_INTEGER; | |
e14bee04 | 5741 | cptr->ts.kind = gfc_index_integer_kind; |
b549d2a5 | 5742 | } |
5743 | else if (cptr->ts.type != BT_INTEGER) | |
5744 | { | |
7698a624 | 5745 | gfc_error ("Cray pointer at %C must be an integer"); |
b549d2a5 | 5746 | return MATCH_ERROR; |
5747 | } | |
5748 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
5749 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
7698a624 | 5750 | " memory addresses require %d bytes", |
1a9745d2 | 5751 | cptr->ts.kind, gfc_index_integer_kind); |
b549d2a5 | 5752 | |
5753 | if (gfc_match_char (',') != MATCH_YES) | |
5754 | { | |
5755 | gfc_error ("Expected \",\" at %C"); | |
e14bee04 | 5756 | return MATCH_ERROR; |
b549d2a5 | 5757 | } |
5758 | ||
e14bee04 | 5759 | /* Match Pointee. */ |
b549d2a5 | 5760 | var_locus = gfc_current_locus; |
5761 | gfc_clear_attr (¤t_attr); | |
5762 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
5763 | current_ts.type = BT_UNKNOWN; | |
5764 | current_ts.kind = 0; | |
5765 | ||
5766 | m = gfc_match_symbol (&cpte, 0); | |
5767 | if (m != MATCH_YES) | |
5768 | { | |
5769 | gfc_error ("Expected variable name at %C"); | |
5770 | return m; | |
5771 | } | |
e14bee04 | 5772 | |
b549d2a5 | 5773 | /* Check for an optional array spec. */ |
5774 | m = gfc_match_array_spec (&as); | |
5775 | if (m == MATCH_ERROR) | |
5776 | { | |
5777 | gfc_free_array_spec (as); | |
5778 | return m; | |
5779 | } | |
5780 | else if (m == MATCH_NO) | |
5781 | { | |
5782 | gfc_free_array_spec (as); | |
5783 | as = NULL; | |
5784 | } | |
5785 | ||
5786 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
5787 | return MATCH_ERROR; | |
5788 | ||
5789 | gfc_set_sym_referenced (cpte); | |
5790 | ||
5791 | if (cpte->as == NULL) | |
5792 | { | |
5793 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
5794 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
5795 | } | |
5796 | else if (as != NULL) | |
5797 | { | |
7698a624 | 5798 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 5799 | gfc_free_array_spec (as); |
5800 | return MATCH_ERROR; | |
5801 | } | |
5802 | ||
5803 | as = NULL; | |
5804 | ||
5805 | if (cpte->as != NULL) | |
5806 | { | |
5807 | /* Fix array spec. */ | |
5808 | m = gfc_mod_pointee_as (cpte->as); | |
5809 | if (m == MATCH_ERROR) | |
5810 | return m; | |
5811 | } | |
5812 | ||
5813 | /* Point the Pointee at the Pointer. */ | |
b7bf3f81 | 5814 | cpte->cp_pointer = cptr; |
b549d2a5 | 5815 | |
5816 | if (gfc_match_char (')') != MATCH_YES) | |
5817 | { | |
5818 | gfc_error ("Expected \")\" at %C"); | |
5819 | return MATCH_ERROR; | |
5820 | } | |
5821 | m = gfc_match_char (','); | |
5822 | if (m != MATCH_YES) | |
5823 | done = true; /* Stop searching for more declarations. */ | |
5824 | ||
5825 | } | |
5826 | ||
5827 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
5828 | || gfc_match_eos () != MATCH_YES) | |
5829 | { | |
5830 | gfc_error ("Expected \",\" or end of statement at %C"); | |
5831 | return MATCH_ERROR; | |
5832 | } | |
5833 | return MATCH_YES; | |
5834 | } | |
5835 | ||
5836 | ||
4ee9c684 | 5837 | match |
5838 | gfc_match_external (void) | |
5839 | { | |
5840 | ||
5841 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5842 | current_attr.external = 1; |
4ee9c684 | 5843 | |
5844 | return attr_decl (); | |
5845 | } | |
5846 | ||
5847 | ||
4ee9c684 | 5848 | match |
5849 | gfc_match_intent (void) | |
5850 | { | |
5851 | sym_intent intent; | |
5852 | ||
5853 | intent = match_intent_spec (); | |
5854 | if (intent == INTENT_UNKNOWN) | |
5855 | return MATCH_ERROR; | |
5856 | ||
5857 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5858 | current_attr.intent = intent; |
4ee9c684 | 5859 | |
5860 | return attr_decl (); | |
5861 | } | |
5862 | ||
5863 | ||
5864 | match | |
5865 | gfc_match_intrinsic (void) | |
5866 | { | |
5867 | ||
5868 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5869 | current_attr.intrinsic = 1; |
4ee9c684 | 5870 | |
5871 | return attr_decl (); | |
5872 | } | |
5873 | ||
5874 | ||
5875 | match | |
5876 | gfc_match_optional (void) | |
5877 | { | |
5878 | ||
5879 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5880 | current_attr.optional = 1; |
4ee9c684 | 5881 | |
5882 | return attr_decl (); | |
5883 | } | |
5884 | ||
5885 | ||
5886 | match | |
5887 | gfc_match_pointer (void) | |
5888 | { | |
b549d2a5 | 5889 | gfc_gobble_whitespace (); |
e0be6f02 | 5890 | if (gfc_peek_ascii_char () == '(') |
b549d2a5 | 5891 | { |
5892 | if (!gfc_option.flag_cray_pointer) | |
5893 | { | |
1a9745d2 | 5894 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
5895 | "flag"); | |
b549d2a5 | 5896 | return MATCH_ERROR; |
5897 | } | |
5898 | return cray_pointer_decl (); | |
5899 | } | |
5900 | else | |
5901 | { | |
5902 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5903 | current_attr.pointer = 1; |
b549d2a5 | 5904 | |
5905 | return attr_decl (); | |
5906 | } | |
4ee9c684 | 5907 | } |
5908 | ||
5909 | ||
5910 | match | |
5911 | gfc_match_allocatable (void) | |
5912 | { | |
4ee9c684 | 5913 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5914 | current_attr.allocatable = 1; |
4ee9c684 | 5915 | |
5916 | return attr_decl (); | |
5917 | } | |
5918 | ||
5919 | ||
5920 | match | |
5921 | gfc_match_dimension (void) | |
5922 | { | |
4ee9c684 | 5923 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5924 | current_attr.dimension = 1; |
4ee9c684 | 5925 | |
5926 | return attr_decl (); | |
5927 | } | |
5928 | ||
5929 | ||
5930 | match | |
5931 | gfc_match_target (void) | |
5932 | { | |
4ee9c684 | 5933 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5934 | current_attr.target = 1; |
4ee9c684 | 5935 | |
5936 | return attr_decl (); | |
5937 | } | |
5938 | ||
5939 | ||
5940 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
5941 | statement. */ | |
5942 | ||
5943 | static match | |
5944 | access_attr_decl (gfc_statement st) | |
5945 | { | |
5946 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5947 | interface_type type; | |
5948 | gfc_user_op *uop; | |
5949 | gfc_symbol *sym; | |
dcb1b019 | 5950 | gfc_intrinsic_op op; |
4ee9c684 | 5951 | match m; |
5952 | ||
5953 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5954 | goto done; | |
5955 | ||
5956 | for (;;) | |
5957 | { | |
dcb1b019 | 5958 | m = gfc_match_generic_spec (&type, name, &op); |
4ee9c684 | 5959 | if (m == MATCH_NO) |
5960 | goto syntax; | |
5961 | if (m == MATCH_ERROR) | |
5962 | return MATCH_ERROR; | |
5963 | ||
5964 | switch (type) | |
5965 | { | |
5966 | case INTERFACE_NAMELESS: | |
94fa7146 | 5967 | case INTERFACE_ABSTRACT: |
4ee9c684 | 5968 | goto syntax; |
5969 | ||
5970 | case INTERFACE_GENERIC: | |
5971 | if (gfc_get_symbol (name, NULL, &sym)) | |
5972 | goto done; | |
5973 | ||
1a9745d2 | 5974 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
5975 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
950683ed | 5976 | sym->name, NULL) == FAILURE) |
4ee9c684 | 5977 | return MATCH_ERROR; |
5978 | ||
5979 | break; | |
5980 | ||
5981 | case INTERFACE_INTRINSIC_OP: | |
dcb1b019 | 5982 | if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN) |
4ee9c684 | 5983 | { |
dcb1b019 | 5984 | gfc_current_ns->operator_access[op] = |
4ee9c684 | 5985 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; |
5986 | } | |
5987 | else | |
5988 | { | |
5989 | gfc_error ("Access specification of the %s operator at %C has " | |
dcb1b019 | 5990 | "already been specified", gfc_op2string (op)); |
4ee9c684 | 5991 | goto done; |
5992 | } | |
5993 | ||
5994 | break; | |
5995 | ||
5996 | case INTERFACE_USER_OP: | |
5997 | uop = gfc_get_uop (name); | |
5998 | ||
5999 | if (uop->access == ACCESS_UNKNOWN) | |
6000 | { | |
1a9745d2 | 6001 | uop->access = (st == ST_PUBLIC) |
6002 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
4ee9c684 | 6003 | } |
6004 | else | |
6005 | { | |
1a9745d2 | 6006 | gfc_error ("Access specification of the .%s. operator at %C " |
6007 | "has already been specified", sym->name); | |
4ee9c684 | 6008 | goto done; |
6009 | } | |
6010 | ||
6011 | break; | |
6012 | } | |
6013 | ||
6014 | if (gfc_match_char (',') == MATCH_NO) | |
6015 | break; | |
6016 | } | |
6017 | ||
6018 | if (gfc_match_eos () != MATCH_YES) | |
6019 | goto syntax; | |
6020 | return MATCH_YES; | |
6021 | ||
6022 | syntax: | |
6023 | gfc_syntax_error (st); | |
6024 | ||
6025 | done: | |
6026 | return MATCH_ERROR; | |
6027 | } | |
6028 | ||
6029 | ||
3ea52af3 | 6030 | match |
6031 | gfc_match_protected (void) | |
6032 | { | |
6033 | gfc_symbol *sym; | |
6034 | match m; | |
6035 | ||
6036 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
6037 | { | |
6038 | gfc_error ("PROTECTED at %C only allowed in specification " | |
6039 | "part of a module"); | |
6040 | return MATCH_ERROR; | |
6041 | ||
6042 | } | |
6043 | ||
1a9745d2 | 6044 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
3ea52af3 | 6045 | == FAILURE) |
6046 | return MATCH_ERROR; | |
6047 | ||
6048 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6049 | { | |
6050 | return MATCH_ERROR; | |
6051 | } | |
6052 | ||
6053 | if (gfc_match_eos () == MATCH_YES) | |
6054 | goto syntax; | |
6055 | ||
6056 | for(;;) | |
6057 | { | |
6058 | m = gfc_match_symbol (&sym, 0); | |
6059 | switch (m) | |
6060 | { | |
6061 | case MATCH_YES: | |
1a9745d2 | 6062 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
6063 | == FAILURE) | |
3ea52af3 | 6064 | return MATCH_ERROR; |
6065 | goto next_item; | |
6066 | ||
6067 | case MATCH_NO: | |
6068 | break; | |
6069 | ||
6070 | case MATCH_ERROR: | |
6071 | return MATCH_ERROR; | |
6072 | } | |
6073 | ||
6074 | next_item: | |
6075 | if (gfc_match_eos () == MATCH_YES) | |
6076 | break; | |
6077 | if (gfc_match_char (',') != MATCH_YES) | |
6078 | goto syntax; | |
6079 | } | |
6080 | ||
6081 | return MATCH_YES; | |
6082 | ||
6083 | syntax: | |
6084 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
6085 | return MATCH_ERROR; | |
6086 | } | |
6087 | ||
6088 | ||
a0527218 | 6089 | /* The PRIVATE statement is a bit weird in that it can be an attribute |
69b1505f | 6090 | declaration, but also works as a standalone statement inside of a |
4ee9c684 | 6091 | type declaration or a module. */ |
6092 | ||
6093 | match | |
1a9745d2 | 6094 | gfc_match_private (gfc_statement *st) |
4ee9c684 | 6095 | { |
6096 | ||
6097 | if (gfc_match ("private") != MATCH_YES) | |
6098 | return MATCH_NO; | |
6099 | ||
e14bee04 | 6100 | if (gfc_current_state () != COMP_MODULE |
7fd88f6e | 6101 | && !(gfc_current_state () == COMP_DERIVED |
6102 | && gfc_state_stack->previous | |
6103 | && gfc_state_stack->previous->state == COMP_MODULE) | |
6104 | && !(gfc_current_state () == COMP_DERIVED_CONTAINS | |
6105 | && gfc_state_stack->previous && gfc_state_stack->previous->previous | |
6106 | && gfc_state_stack->previous->previous->state == COMP_MODULE)) | |
e14bee04 | 6107 | { |
6108 | gfc_error ("PRIVATE statement at %C is only allowed in the " | |
6109 | "specification part of a module"); | |
6110 | return MATCH_ERROR; | |
6111 | } | |
6112 | ||
4ee9c684 | 6113 | if (gfc_current_state () == COMP_DERIVED) |
6114 | { | |
6115 | if (gfc_match_eos () == MATCH_YES) | |
6116 | { | |
6117 | *st = ST_PRIVATE; | |
6118 | return MATCH_YES; | |
6119 | } | |
6120 | ||
6121 | gfc_syntax_error (ST_PRIVATE); | |
6122 | return MATCH_ERROR; | |
6123 | } | |
6124 | ||
6125 | if (gfc_match_eos () == MATCH_YES) | |
6126 | { | |
6127 | *st = ST_PRIVATE; | |
6128 | return MATCH_YES; | |
6129 | } | |
6130 | ||
6131 | *st = ST_ATTR_DECL; | |
6132 | return access_attr_decl (ST_PRIVATE); | |
6133 | } | |
6134 | ||
6135 | ||
6136 | match | |
1a9745d2 | 6137 | gfc_match_public (gfc_statement *st) |
4ee9c684 | 6138 | { |
6139 | ||
6140 | if (gfc_match ("public") != MATCH_YES) | |
6141 | return MATCH_NO; | |
6142 | ||
e14bee04 | 6143 | if (gfc_current_state () != COMP_MODULE) |
6144 | { | |
6145 | gfc_error ("PUBLIC statement at %C is only allowed in the " | |
6146 | "specification part of a module"); | |
6147 | return MATCH_ERROR; | |
6148 | } | |
6149 | ||
4ee9c684 | 6150 | if (gfc_match_eos () == MATCH_YES) |
6151 | { | |
6152 | *st = ST_PUBLIC; | |
6153 | return MATCH_YES; | |
6154 | } | |
6155 | ||
6156 | *st = ST_ATTR_DECL; | |
6157 | return access_attr_decl (ST_PUBLIC); | |
6158 | } | |
6159 | ||
6160 | ||
6161 | /* Workhorse for gfc_match_parameter. */ | |
6162 | ||
6163 | static match | |
6164 | do_parm (void) | |
6165 | { | |
6166 | gfc_symbol *sym; | |
6167 | gfc_expr *init; | |
6168 | match m; | |
6169 | ||
6170 | m = gfc_match_symbol (&sym, 0); | |
6171 | if (m == MATCH_NO) | |
6172 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
6173 | ||
6174 | if (m != MATCH_YES) | |
6175 | return m; | |
6176 | ||
6177 | if (gfc_match_char ('=') == MATCH_NO) | |
6178 | { | |
6179 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
6180 | return MATCH_ERROR; | |
6181 | } | |
6182 | ||
6183 | m = gfc_match_init_expr (&init); | |
6184 | if (m == MATCH_NO) | |
6185 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
6186 | if (m != MATCH_YES) | |
6187 | return m; | |
6188 | ||
6189 | if (sym->ts.type == BT_UNKNOWN | |
6190 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
6191 | { | |
6192 | m = MATCH_ERROR; | |
6193 | goto cleanup; | |
6194 | } | |
6195 | ||
6196 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
950683ed | 6197 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
4ee9c684 | 6198 | { |
6199 | m = MATCH_ERROR; | |
6200 | goto cleanup; | |
6201 | } | |
6202 | ||
13aebeb0 | 6203 | if (sym->value) |
6204 | { | |
6205 | gfc_error ("Initializing already initialized variable at %C"); | |
6206 | m = MATCH_ERROR; | |
6207 | goto cleanup; | |
6208 | } | |
6209 | ||
c1b6da4a | 6210 | if (sym->ts.type == BT_CHARACTER |
eeebe20b | 6211 | && sym->ts.u.cl != NULL |
6212 | && sym->ts.u.cl->length != NULL | |
6213 | && sym->ts.u.cl->length->expr_type == EXPR_CONSTANT | |
c1b6da4a | 6214 | && init->expr_type == EXPR_CONSTANT |
f97d54ed | 6215 | && init->ts.type == BT_CHARACTER) |
c1b6da4a | 6216 | gfc_set_constant_character_len ( |
eeebe20b | 6217 | mpz_get_si (sym->ts.u.cl->length->value.integer), init, -1); |
6218 | else if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl != NULL | |
6219 | && sym->ts.u.cl->length == NULL) | |
f97d54ed | 6220 | { |
6221 | int clen; | |
6222 | if (init->expr_type == EXPR_CONSTANT) | |
6223 | { | |
6224 | clen = init->value.character.length; | |
eeebe20b | 6225 | sym->ts.u.cl->length = gfc_int_expr (clen); |
f97d54ed | 6226 | } |
6227 | else if (init->expr_type == EXPR_ARRAY) | |
6228 | { | |
6229 | gfc_expr *p = init->value.constructor->expr; | |
6230 | clen = p->value.character.length; | |
eeebe20b | 6231 | sym->ts.u.cl->length = gfc_int_expr (clen); |
f97d54ed | 6232 | } |
eeebe20b | 6233 | else if (init->ts.u.cl && init->ts.u.cl->length) |
6234 | sym->ts.u.cl->length = gfc_copy_expr (sym->value->ts.u.cl->length); | |
f97d54ed | 6235 | } |
c1b6da4a | 6236 | |
4ee9c684 | 6237 | sym->value = init; |
6238 | return MATCH_YES; | |
6239 | ||
6240 | cleanup: | |
6241 | gfc_free_expr (init); | |
6242 | return m; | |
6243 | } | |
6244 | ||
6245 | ||
6246 | /* Match a parameter statement, with the weird syntax that these have. */ | |
6247 | ||
6248 | match | |
6249 | gfc_match_parameter (void) | |
6250 | { | |
6251 | match m; | |
6252 | ||
6253 | if (gfc_match_char ('(') == MATCH_NO) | |
6254 | return MATCH_NO; | |
6255 | ||
6256 | for (;;) | |
6257 | { | |
6258 | m = do_parm (); | |
6259 | if (m != MATCH_YES) | |
6260 | break; | |
6261 | ||
6262 | if (gfc_match (" )%t") == MATCH_YES) | |
6263 | break; | |
6264 | ||
6265 | if (gfc_match_char (',') != MATCH_YES) | |
6266 | { | |
6267 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
6268 | m = MATCH_ERROR; | |
6269 | break; | |
6270 | } | |
6271 | } | |
6272 | ||
6273 | return m; | |
6274 | } | |
6275 | ||
6276 | ||
6277 | /* Save statements have a special syntax. */ | |
6278 | ||
6279 | match | |
6280 | gfc_match_save (void) | |
6281 | { | |
82f5ee13 | 6282 | char n[GFC_MAX_SYMBOL_LEN+1]; |
6283 | gfc_common_head *c; | |
4ee9c684 | 6284 | gfc_symbol *sym; |
6285 | match m; | |
6286 | ||
6287 | if (gfc_match_eos () == MATCH_YES) | |
6288 | { | |
6289 | if (gfc_current_ns->seen_save) | |
6290 | { | |
1a9745d2 | 6291 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
6292 | "follows previous SAVE statement") | |
76e82f95 | 6293 | == FAILURE) |
6294 | return MATCH_ERROR; | |
4ee9c684 | 6295 | } |
6296 | ||
6297 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
6298 | return MATCH_YES; | |
6299 | } | |
6300 | ||
6301 | if (gfc_current_ns->save_all) | |
6302 | { | |
1a9745d2 | 6303 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
6304 | "blanket SAVE statement") | |
76e82f95 | 6305 | == FAILURE) |
6306 | return MATCH_ERROR; | |
4ee9c684 | 6307 | } |
6308 | ||
6309 | gfc_match (" ::"); | |
6310 | ||
6311 | for (;;) | |
6312 | { | |
6313 | m = gfc_match_symbol (&sym, 0); | |
6314 | switch (m) | |
6315 | { | |
6316 | case MATCH_YES: | |
1a9745d2 | 6317 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
6318 | == FAILURE) | |
4ee9c684 | 6319 | return MATCH_ERROR; |
6320 | goto next_item; | |
6321 | ||
6322 | case MATCH_NO: | |
6323 | break; | |
6324 | ||
6325 | case MATCH_ERROR: | |
6326 | return MATCH_ERROR; | |
6327 | } | |
6328 | ||
82f5ee13 | 6329 | m = gfc_match (" / %n /", &n); |
4ee9c684 | 6330 | if (m == MATCH_ERROR) |
6331 | return MATCH_ERROR; | |
6332 | if (m == MATCH_NO) | |
6333 | goto syntax; | |
6334 | ||
403ddc45 | 6335 | c = gfc_get_common (n, 0); |
82f5ee13 | 6336 | c->saved = 1; |
6337 | ||
4ee9c684 | 6338 | gfc_current_ns->seen_save = 1; |
6339 | ||
6340 | next_item: | |
6341 | if (gfc_match_eos () == MATCH_YES) | |
6342 | break; | |
6343 | if (gfc_match_char (',') != MATCH_YES) | |
6344 | goto syntax; | |
6345 | } | |
6346 | ||
6347 | return MATCH_YES; | |
6348 | ||
6349 | syntax: | |
6350 | gfc_error ("Syntax error in SAVE statement at %C"); | |
6351 | return MATCH_ERROR; | |
6352 | } | |
6353 | ||
6354 | ||
8f6339b6 | 6355 | match |
6356 | gfc_match_value (void) | |
6357 | { | |
6358 | gfc_symbol *sym; | |
6359 | match m; | |
6360 | ||
1a9745d2 | 6361 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
8f6339b6 | 6362 | == FAILURE) |
6363 | return MATCH_ERROR; | |
6364 | ||
6365 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6366 | { | |
6367 | return MATCH_ERROR; | |
6368 | } | |
6369 | ||
6370 | if (gfc_match_eos () == MATCH_YES) | |
6371 | goto syntax; | |
6372 | ||
6373 | for(;;) | |
6374 | { | |
6375 | m = gfc_match_symbol (&sym, 0); | |
6376 | switch (m) | |
6377 | { | |
6378 | case MATCH_YES: | |
1a9745d2 | 6379 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
6380 | == FAILURE) | |
8f6339b6 | 6381 | return MATCH_ERROR; |
6382 | goto next_item; | |
6383 | ||
6384 | case MATCH_NO: | |
6385 | break; | |
6386 | ||
6387 | case MATCH_ERROR: | |
6388 | return MATCH_ERROR; | |
6389 | } | |
6390 | ||
6391 | next_item: | |
6392 | if (gfc_match_eos () == MATCH_YES) | |
6393 | break; | |
6394 | if (gfc_match_char (',') != MATCH_YES) | |
6395 | goto syntax; | |
6396 | } | |
6397 | ||
6398 | return MATCH_YES; | |
6399 | ||
6400 | syntax: | |
6401 | gfc_error ("Syntax error in VALUE statement at %C"); | |
6402 | return MATCH_ERROR; | |
6403 | } | |
6404 | ||
f6d0e37a | 6405 | |
ef814c81 | 6406 | match |
6407 | gfc_match_volatile (void) | |
6408 | { | |
6409 | gfc_symbol *sym; | |
6410 | match m; | |
6411 | ||
1a9745d2 | 6412 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
ef814c81 | 6413 | == FAILURE) |
6414 | return MATCH_ERROR; | |
6415 | ||
6416 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6417 | { | |
6418 | return MATCH_ERROR; | |
6419 | } | |
6420 | ||
6421 | if (gfc_match_eos () == MATCH_YES) | |
6422 | goto syntax; | |
6423 | ||
6424 | for(;;) | |
6425 | { | |
2f241857 | 6426 | /* VOLATILE is special because it can be added to host-associated |
6427 | symbols locally. */ | |
6428 | m = gfc_match_symbol (&sym, 1); | |
ef814c81 | 6429 | switch (m) |
6430 | { | |
6431 | case MATCH_YES: | |
1a9745d2 | 6432 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
6433 | == FAILURE) | |
ef814c81 | 6434 | return MATCH_ERROR; |
6435 | goto next_item; | |
6436 | ||
6437 | case MATCH_NO: | |
6438 | break; | |
6439 | ||
6440 | case MATCH_ERROR: | |
6441 | return MATCH_ERROR; | |
6442 | } | |
6443 | ||
6444 | next_item: | |
6445 | if (gfc_match_eos () == MATCH_YES) | |
6446 | break; | |
6447 | if (gfc_match_char (',') != MATCH_YES) | |
6448 | goto syntax; | |
6449 | } | |
6450 | ||
6451 | return MATCH_YES; | |
6452 | ||
6453 | syntax: | |
6454 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
6455 | return MATCH_ERROR; | |
6456 | } | |
6457 | ||
6458 | ||
4ee9c684 | 6459 | /* Match a module procedure statement. Note that we have to modify |
6460 | symbols in the parent's namespace because the current one was there | |
89d91d02 | 6461 | to receive symbols that are in an interface's formal argument list. */ |
4ee9c684 | 6462 | |
6463 | match | |
6464 | gfc_match_modproc (void) | |
6465 | { | |
6466 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6467 | gfc_symbol *sym; | |
6468 | match m; | |
63d42079 | 6469 | gfc_namespace *module_ns; |
94ce9f74 | 6470 | gfc_interface *old_interface_head, *interface; |
4ee9c684 | 6471 | |
6472 | if (gfc_state_stack->state != COMP_INTERFACE | |
6473 | || gfc_state_stack->previous == NULL | |
5cf92482 | 6474 | || current_interface.type == INTERFACE_NAMELESS |
6475 | || current_interface.type == INTERFACE_ABSTRACT) | |
4ee9c684 | 6476 | { |
1a9745d2 | 6477 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
6478 | "interface"); | |
4ee9c684 | 6479 | return MATCH_ERROR; |
6480 | } | |
6481 | ||
63d42079 | 6482 | module_ns = gfc_current_ns->parent; |
6483 | for (; module_ns; module_ns = module_ns->parent) | |
6484 | if (module_ns->proc_name->attr.flavor == FL_MODULE) | |
6485 | break; | |
6486 | ||
6487 | if (module_ns == NULL) | |
6488 | return MATCH_ERROR; | |
6489 | ||
94ce9f74 | 6490 | /* Store the current state of the interface. We will need it if we |
6491 | end up with a syntax error and need to recover. */ | |
6492 | old_interface_head = gfc_current_interface_head (); | |
6493 | ||
4ee9c684 | 6494 | for (;;) |
6495 | { | |
94ce9f74 | 6496 | bool last = false; |
6497 | ||
4ee9c684 | 6498 | m = gfc_match_name (name); |
6499 | if (m == MATCH_NO) | |
6500 | goto syntax; | |
6501 | if (m != MATCH_YES) | |
6502 | return MATCH_ERROR; | |
6503 | ||
94ce9f74 | 6504 | /* Check for syntax error before starting to add symbols to the |
6505 | current namespace. */ | |
6506 | if (gfc_match_eos () == MATCH_YES) | |
6507 | last = true; | |
6508 | if (!last && gfc_match_char (',') != MATCH_YES) | |
6509 | goto syntax; | |
6510 | ||
6511 | /* Now we're sure the syntax is valid, we process this item | |
6512 | further. */ | |
63d42079 | 6513 | if (gfc_get_symbol (name, module_ns, &sym)) |
4ee9c684 | 6514 | return MATCH_ERROR; |
6515 | ||
6516 | if (sym->attr.proc != PROC_MODULE | |
950683ed | 6517 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
6518 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 6519 | return MATCH_ERROR; |
6520 | ||
6521 | if (gfc_add_interface (sym) == FAILURE) | |
6522 | return MATCH_ERROR; | |
6523 | ||
3186f695 | 6524 | sym->attr.mod_proc = 1; |
6525 | ||
94ce9f74 | 6526 | if (last) |
4ee9c684 | 6527 | break; |
4ee9c684 | 6528 | } |
6529 | ||
6530 | return MATCH_YES; | |
6531 | ||
6532 | syntax: | |
94ce9f74 | 6533 | /* Restore the previous state of the interface. */ |
6534 | interface = gfc_current_interface_head (); | |
6535 | gfc_set_current_interface_head (old_interface_head); | |
6536 | ||
6537 | /* Free the new interfaces. */ | |
6538 | while (interface != old_interface_head) | |
6539 | { | |
6540 | gfc_interface *i = interface->next; | |
6541 | gfc_free (interface); | |
6542 | interface = i; | |
6543 | } | |
6544 | ||
6545 | /* And issue a syntax error. */ | |
4ee9c684 | 6546 | gfc_syntax_error (ST_MODULE_PROC); |
6547 | return MATCH_ERROR; | |
6548 | } | |
6549 | ||
6550 | ||
ea94d76d | 6551 | /* Check a derived type that is being extended. */ |
6552 | static gfc_symbol* | |
6553 | check_extended_derived_type (char *name) | |
6554 | { | |
6555 | gfc_symbol *extended; | |
6556 | ||
6557 | if (gfc_find_symbol (name, gfc_current_ns, 1, &extended)) | |
6558 | { | |
6559 | gfc_error ("Ambiguous symbol in TYPE definition at %C"); | |
6560 | return NULL; | |
6561 | } | |
6562 | ||
6563 | if (!extended) | |
6564 | { | |
6565 | gfc_error ("No such symbol in TYPE definition at %C"); | |
6566 | return NULL; | |
6567 | } | |
6568 | ||
6569 | if (extended->attr.flavor != FL_DERIVED) | |
6570 | { | |
6571 | gfc_error ("'%s' in EXTENDS expression at %C is not a " | |
6572 | "derived type", name); | |
6573 | return NULL; | |
6574 | } | |
6575 | ||
6576 | if (extended->attr.is_bind_c) | |
6577 | { | |
6578 | gfc_error ("'%s' cannot be extended at %C because it " | |
6579 | "is BIND(C)", extended->name); | |
6580 | return NULL; | |
6581 | } | |
6582 | ||
6583 | if (extended->attr.sequence) | |
6584 | { | |
6585 | gfc_error ("'%s' cannot be extended at %C because it " | |
6586 | "is a SEQUENCE type", extended->name); | |
6587 | return NULL; | |
6588 | } | |
6589 | ||
6590 | return extended; | |
6591 | } | |
6592 | ||
6593 | ||
c5d33754 | 6594 | /* Match the optional attribute specifiers for a type declaration. |
6595 | Return MATCH_ERROR if an error is encountered in one of the handled | |
6596 | attributes (public, private, bind(c)), MATCH_NO if what's found is | |
6597 | not a handled attribute, and MATCH_YES otherwise. TODO: More error | |
6598 | checking on attribute conflicts needs to be done. */ | |
4ee9c684 | 6599 | |
6600 | match | |
ea94d76d | 6601 | gfc_get_type_attr_spec (symbol_attribute *attr, char *name) |
4ee9c684 | 6602 | { |
c5d33754 | 6603 | /* See if the derived type is marked as private. */ |
4ee9c684 | 6604 | if (gfc_match (" , private") == MATCH_YES) |
6605 | { | |
e14bee04 | 6606 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 6607 | { |
e14bee04 | 6608 | gfc_error ("Derived type at %C can only be PRIVATE in the " |
6609 | "specification part of a module"); | |
4ee9c684 | 6610 | return MATCH_ERROR; |
6611 | } | |
6612 | ||
c5d33754 | 6613 | if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
4ee9c684 | 6614 | return MATCH_ERROR; |
4ee9c684 | 6615 | } |
c5d33754 | 6616 | else if (gfc_match (" , public") == MATCH_YES) |
4ee9c684 | 6617 | { |
e14bee04 | 6618 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 6619 | { |
e14bee04 | 6620 | gfc_error ("Derived type at %C can only be PUBLIC in the " |
6621 | "specification part of a module"); | |
4ee9c684 | 6622 | return MATCH_ERROR; |
6623 | } | |
6624 | ||
c5d33754 | 6625 | if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
4ee9c684 | 6626 | return MATCH_ERROR; |
4ee9c684 | 6627 | } |
ac5f2650 | 6628 | else if (gfc_match (" , bind ( c )") == MATCH_YES) |
c5d33754 | 6629 | { |
6630 | /* If the type is defined to be bind(c) it then needs to make | |
6631 | sure that all fields are interoperable. This will | |
6632 | need to be a semantic check on the finished derived type. | |
6633 | See 15.2.3 (lines 9-12) of F2003 draft. */ | |
6634 | if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) | |
6635 | return MATCH_ERROR; | |
6636 | ||
6637 | /* TODO: attr conflicts need to be checked, probably in symbol.c. */ | |
6638 | } | |
ac5f2650 | 6639 | else if (gfc_match (" , abstract") == MATCH_YES) |
6640 | { | |
6641 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C") | |
6642 | == FAILURE) | |
6643 | return MATCH_ERROR; | |
6644 | ||
6645 | if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE) | |
6646 | return MATCH_ERROR; | |
6647 | } | |
ea94d76d | 6648 | else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES) |
6649 | { | |
e485ad6b | 6650 | if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE) |
ea94d76d | 6651 | return MATCH_ERROR; |
6652 | } | |
c5d33754 | 6653 | else |
6654 | return MATCH_NO; | |
6655 | ||
6656 | /* If we get here, something matched. */ | |
6657 | return MATCH_YES; | |
6658 | } | |
6659 | ||
6660 | ||
6661 | /* Match the beginning of a derived type declaration. If a type name | |
6662 | was the result of a function, then it is possible to have a symbol | |
6663 | already to be known as a derived type yet have no components. */ | |
6664 | ||
6665 | match | |
6666 | gfc_match_derived_decl (void) | |
6667 | { | |
6668 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
ea94d76d | 6669 | char parent[GFC_MAX_SYMBOL_LEN + 1]; |
c5d33754 | 6670 | symbol_attribute attr; |
6671 | gfc_symbol *sym; | |
ea94d76d | 6672 | gfc_symbol *extended; |
c5d33754 | 6673 | match m; |
6674 | match is_type_attr_spec = MATCH_NO; | |
33e86520 | 6675 | bool seen_attr = false; |
c5d33754 | 6676 | |
6677 | if (gfc_current_state () == COMP_DERIVED) | |
6678 | return MATCH_NO; | |
6679 | ||
ea94d76d | 6680 | name[0] = '\0'; |
6681 | parent[0] = '\0'; | |
c5d33754 | 6682 | gfc_clear_attr (&attr); |
ea94d76d | 6683 | extended = NULL; |
c5d33754 | 6684 | |
6685 | do | |
6686 | { | |
ea94d76d | 6687 | is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent); |
c5d33754 | 6688 | if (is_type_attr_spec == MATCH_ERROR) |
6689 | return MATCH_ERROR; | |
33e86520 | 6690 | if (is_type_attr_spec == MATCH_YES) |
6691 | seen_attr = true; | |
c5d33754 | 6692 | } while (is_type_attr_spec == MATCH_YES); |
4ee9c684 | 6693 | |
e485ad6b | 6694 | /* Deal with derived type extensions. The extension attribute has |
6695 | been added to 'attr' but now the parent type must be found and | |
6696 | checked. */ | |
ea94d76d | 6697 | if (parent[0]) |
6698 | extended = check_extended_derived_type (parent); | |
6699 | ||
6700 | if (parent[0] && !extended) | |
6701 | return MATCH_ERROR; | |
6702 | ||
33e86520 | 6703 | if (gfc_match (" ::") != MATCH_YES && seen_attr) |
4ee9c684 | 6704 | { |
6705 | gfc_error ("Expected :: in TYPE definition at %C"); | |
6706 | return MATCH_ERROR; | |
6707 | } | |
6708 | ||
6709 | m = gfc_match (" %n%t", name); | |
6710 | if (m != MATCH_YES) | |
6711 | return m; | |
6712 | ||
a3055431 | 6713 | /* Make sure the name is not the name of an intrinsic type. */ |
6714 | if (gfc_is_intrinsic_typename (name)) | |
4ee9c684 | 6715 | { |
1a9745d2 | 6716 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
6717 | "type", name); | |
4ee9c684 | 6718 | return MATCH_ERROR; |
6719 | } | |
6720 | ||
6721 | if (gfc_get_symbol (name, NULL, &sym)) | |
6722 | return MATCH_ERROR; | |
6723 | ||
6724 | if (sym->ts.type != BT_UNKNOWN) | |
6725 | { | |
6726 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
6727 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
6728 | return MATCH_ERROR; | |
6729 | } | |
6730 | ||
6731 | /* The symbol may already have the derived attribute without the | |
6732 | components. The ways this can happen is via a function | |
6733 | definition, an INTRINSIC statement or a subtype in another | |
6734 | derived type that is a pointer. The first part of the AND clause | |
69b1505f | 6735 | is true if the symbol is not the return value of a function. */ |
4ee9c684 | 6736 | if (sym->attr.flavor != FL_DERIVED |
950683ed | 6737 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 6738 | return MATCH_ERROR; |
6739 | ||
e6b82afc | 6740 | if (sym->components != NULL || sym->attr.zero_comp) |
4ee9c684 | 6741 | { |
1a9745d2 | 6742 | gfc_error ("Derived type definition of '%s' at %C has already been " |
6743 | "defined", sym->name); | |
4ee9c684 | 6744 | return MATCH_ERROR; |
6745 | } | |
6746 | ||
6747 | if (attr.access != ACCESS_UNKNOWN | |
950683ed | 6748 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
4ee9c684 | 6749 | return MATCH_ERROR; |
6750 | ||
c5d33754 | 6751 | /* See if the derived type was labeled as bind(c). */ |
6752 | if (attr.is_bind_c != 0) | |
6753 | sym->attr.is_bind_c = attr.is_bind_c; | |
6754 | ||
223f0f57 | 6755 | /* Construct the f2k_derived namespace if it is not yet there. */ |
6756 | if (!sym->f2k_derived) | |
6757 | sym->f2k_derived = gfc_get_namespace (NULL, 0); | |
ea94d76d | 6758 | |
6759 | if (extended && !sym->components) | |
6760 | { | |
6761 | gfc_component *p; | |
6762 | gfc_symtree *st; | |
6763 | ||
6764 | /* Add the extended derived type as the first component. */ | |
6765 | gfc_add_component (sym, parent, &p); | |
e485ad6b | 6766 | sym->attr.extension = attr.extension; |
ea94d76d | 6767 | extended->refs++; |
6768 | gfc_set_sym_referenced (extended); | |
6769 | ||
6770 | p->ts.type = BT_DERIVED; | |
eeebe20b | 6771 | p->ts.u.derived = extended; |
ea94d76d | 6772 | p->initializer = gfc_default_initializer (&p->ts); |
6773 | ||
6774 | /* Provide the links between the extended type and its extension. */ | |
6775 | if (!extended->f2k_derived) | |
6776 | extended->f2k_derived = gfc_get_namespace (NULL, 0); | |
6777 | st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name); | |
6778 | st->n.sym = sym; | |
6779 | } | |
6780 | ||
ac5f2650 | 6781 | /* Take over the ABSTRACT attribute. */ |
6782 | sym->attr.abstract = attr.abstract; | |
6783 | ||
4ee9c684 | 6784 | gfc_new_block = sym; |
6785 | ||
6786 | return MATCH_YES; | |
6787 | } | |
b549d2a5 | 6788 | |
6789 | ||
6790 | /* Cray Pointees can be declared as: | |
6791 | pointer (ipt, a (n,m,...,*)) | |
6792 | By default, this is treated as an AS_ASSUMED_SIZE array. We'll | |
6793 | cheat and set a constant bound of 1 for the last dimension, if this | |
6794 | is the case. Since there is no bounds-checking for Cray Pointees, | |
6795 | this will be okay. */ | |
6796 | ||
8458f4ca | 6797 | match |
b549d2a5 | 6798 | gfc_mod_pointee_as (gfc_array_spec *as) |
6799 | { | |
6800 | as->cray_pointee = true; /* This will be useful to know later. */ | |
6801 | if (as->type == AS_ASSUMED_SIZE) | |
6802 | { | |
6803 | as->type = AS_EXPLICIT; | |
6804 | as->upper[as->rank - 1] = gfc_int_expr (1); | |
6805 | as->cp_was_assumed = true; | |
6806 | } | |
6807 | else if (as->type == AS_ASSUMED_SHAPE) | |
6808 | { | |
6809 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
6810 | return MATCH_ERROR; | |
6811 | } | |
6812 | return MATCH_YES; | |
6813 | } | |
3b6a4b41 | 6814 | |
6815 | ||
6816 | /* Match the enum definition statement, here we are trying to match | |
6817 | the first line of enum definition statement. | |
6818 | Returns MATCH_YES if match is found. */ | |
6819 | ||
6820 | match | |
6821 | gfc_match_enum (void) | |
6822 | { | |
6823 | match m; | |
6824 | ||
6825 | m = gfc_match_eos (); | |
6826 | if (m != MATCH_YES) | |
6827 | return m; | |
6828 | ||
60fbbf9e | 6829 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") |
3b6a4b41 | 6830 | == FAILURE) |
6831 | return MATCH_ERROR; | |
6832 | ||
6833 | return MATCH_YES; | |
6834 | } | |
6835 | ||
6836 | ||
fe1328da | 6837 | /* Returns an initializer whose value is one higher than the value of the |
6838 | LAST_INITIALIZER argument. If the argument is NULL, the | |
6839 | initializers value will be set to zero. The initializer's kind | |
6840 | will be set to gfc_c_int_kind. | |
6841 | ||
6842 | If -fshort-enums is given, the appropriate kind will be selected | |
6843 | later after all enumerators have been parsed. A warning is issued | |
6844 | here if an initializer exceeds gfc_c_int_kind. */ | |
6845 | ||
6846 | static gfc_expr * | |
6847 | enum_initializer (gfc_expr *last_initializer, locus where) | |
6848 | { | |
6849 | gfc_expr *result; | |
6850 | ||
6851 | result = gfc_get_expr (); | |
6852 | result->expr_type = EXPR_CONSTANT; | |
6853 | result->ts.type = BT_INTEGER; | |
6854 | result->ts.kind = gfc_c_int_kind; | |
6855 | result->where = where; | |
6856 | ||
6857 | mpz_init (result->value.integer); | |
6858 | ||
6859 | if (last_initializer != NULL) | |
6860 | { | |
6861 | mpz_add_ui (result->value.integer, last_initializer->value.integer, 1); | |
6862 | result->where = last_initializer->where; | |
6863 | ||
6864 | if (gfc_check_integer_range (result->value.integer, | |
6865 | gfc_c_int_kind) != ARITH_OK) | |
6866 | { | |
6867 | gfc_error ("Enumerator exceeds the C integer type at %C"); | |
6868 | return NULL; | |
6869 | } | |
6870 | } | |
6871 | else | |
6872 | { | |
6873 | /* Control comes here, if it's the very first enumerator and no | |
6874 | initializer has been given. It will be initialized to zero. */ | |
6875 | mpz_set_si (result->value.integer, 0); | |
6876 | } | |
6877 | ||
6878 | return result; | |
6879 | } | |
6880 | ||
6881 | ||
60fbbf9e | 6882 | /* Match a variable name with an optional initializer. When this |
6883 | subroutine is called, a variable is expected to be parsed next. | |
6884 | Depending on what is happening at the moment, updates either the | |
6885 | symbol table or the current interface. */ | |
6886 | ||
6887 | static match | |
6888 | enumerator_decl (void) | |
6889 | { | |
6890 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6891 | gfc_expr *initializer; | |
6892 | gfc_array_spec *as = NULL; | |
6893 | gfc_symbol *sym; | |
6894 | locus var_locus; | |
6895 | match m; | |
f6bb8f4b | 6896 | gfc_try t; |
60fbbf9e | 6897 | locus old_locus; |
6898 | ||
6899 | initializer = NULL; | |
6900 | old_locus = gfc_current_locus; | |
6901 | ||
6902 | /* When we get here, we've just matched a list of attributes and | |
6903 | maybe a type and a double colon. The next thing we expect to see | |
6904 | is the name of the symbol. */ | |
6905 | m = gfc_match_name (name); | |
6906 | if (m != MATCH_YES) | |
6907 | goto cleanup; | |
6908 | ||
6909 | var_locus = gfc_current_locus; | |
6910 | ||
6911 | /* OK, we've successfully matched the declaration. Now put the | |
6912 | symbol in the current namespace. If we fail to create the symbol, | |
6913 | bail out. */ | |
6914 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
6915 | { | |
6916 | m = MATCH_ERROR; | |
6917 | goto cleanup; | |
6918 | } | |
6919 | ||
6920 | /* The double colon must be present in order to have initializers. | |
6921 | Otherwise the statement is ambiguous with an assignment statement. */ | |
6922 | if (colon_seen) | |
6923 | { | |
6924 | if (gfc_match_char ('=') == MATCH_YES) | |
6925 | { | |
6926 | m = gfc_match_init_expr (&initializer); | |
6927 | if (m == MATCH_NO) | |
6928 | { | |
6929 | gfc_error ("Expected an initialization expression at %C"); | |
6930 | m = MATCH_ERROR; | |
6931 | } | |
6932 | ||
6933 | if (m != MATCH_YES) | |
6934 | goto cleanup; | |
6935 | } | |
6936 | } | |
6937 | ||
6938 | /* If we do not have an initializer, the initialization value of the | |
6939 | previous enumerator (stored in last_initializer) is incremented | |
6940 | by 1 and is used to initialize the current enumerator. */ | |
6941 | if (initializer == NULL) | |
fe1328da | 6942 | initializer = enum_initializer (last_initializer, old_locus); |
e14bee04 | 6943 | |
60fbbf9e | 6944 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
6945 | { | |
6946 | gfc_error("ENUMERATOR %L not initialized with integer expression", | |
6947 | &var_locus); | |
e14bee04 | 6948 | m = MATCH_ERROR; |
60fbbf9e | 6949 | gfc_free_enum_history (); |
6950 | goto cleanup; | |
6951 | } | |
6952 | ||
6953 | /* Store this current initializer, for the next enumerator variable | |
6954 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
6955 | use last_initializer below. */ | |
6956 | last_initializer = initializer; | |
6957 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
6958 | ||
6959 | /* Maintain enumerator history. */ | |
6960 | gfc_find_symbol (name, NULL, 0, &sym); | |
6961 | create_enum_history (sym, last_initializer); | |
6962 | ||
6963 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
6964 | ||
6965 | cleanup: | |
6966 | /* Free stuff up and return. */ | |
6967 | gfc_free_expr (initializer); | |
6968 | ||
6969 | return m; | |
6970 | } | |
6971 | ||
6972 | ||
f6d0e37a | 6973 | /* Match the enumerator definition statement. */ |
3b6a4b41 | 6974 | |
6975 | match | |
6976 | gfc_match_enumerator_def (void) | |
6977 | { | |
6978 | match m; | |
f6bb8f4b | 6979 | gfc_try t; |
e14bee04 | 6980 | |
3b6a4b41 | 6981 | gfc_clear_ts (¤t_ts); |
e14bee04 | 6982 | |
3b6a4b41 | 6983 | m = gfc_match (" enumerator"); |
6984 | if (m != MATCH_YES) | |
6985 | return m; | |
60fbbf9e | 6986 | |
6987 | m = gfc_match (" :: "); | |
6988 | if (m == MATCH_ERROR) | |
6989 | return m; | |
6990 | ||
6991 | colon_seen = (m == MATCH_YES); | |
e14bee04 | 6992 | |
3b6a4b41 | 6993 | if (gfc_current_state () != COMP_ENUM) |
6994 | { | |
6995 | gfc_error ("ENUM definition statement expected before %C"); | |
6996 | gfc_free_enum_history (); | |
6997 | return MATCH_ERROR; | |
6998 | } | |
6999 | ||
7000 | (¤t_ts)->type = BT_INTEGER; | |
7001 | (¤t_ts)->kind = gfc_c_int_kind; | |
e14bee04 | 7002 | |
60fbbf9e | 7003 | gfc_clear_attr (¤t_attr); |
7004 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
7005 | if (t == FAILURE) | |
3b6a4b41 | 7006 | { |
60fbbf9e | 7007 | m = MATCH_ERROR; |
3b6a4b41 | 7008 | goto cleanup; |
7009 | } | |
7010 | ||
3b6a4b41 | 7011 | for (;;) |
7012 | { | |
60fbbf9e | 7013 | m = enumerator_decl (); |
3b6a4b41 | 7014 | if (m == MATCH_ERROR) |
7015 | goto cleanup; | |
7016 | if (m == MATCH_NO) | |
7017 | break; | |
7018 | ||
7019 | if (gfc_match_eos () == MATCH_YES) | |
7020 | goto cleanup; | |
7021 | if (gfc_match_char (',') != MATCH_YES) | |
7022 | break; | |
7023 | } | |
7024 | ||
7025 | if (gfc_current_state () == COMP_ENUM) | |
7026 | { | |
7027 | gfc_free_enum_history (); | |
7028 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
7029 | m = MATCH_ERROR; | |
7030 | } | |
7031 | ||
7032 | cleanup: | |
7033 | gfc_free_array_spec (current_as); | |
7034 | current_as = NULL; | |
7035 | return m; | |
7036 | ||
7037 | } | |
7038 | ||
e449e4dd | 7039 | |
7fd88f6e | 7040 | /* Match binding attributes. */ |
7041 | ||
7042 | static match | |
64e93293 | 7043 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc) |
7fd88f6e | 7044 | { |
7045 | bool found_passing = false; | |
64e93293 | 7046 | bool seen_ptr = false; |
fe9b08a2 | 7047 | match m = MATCH_YES; |
7fd88f6e | 7048 | |
7049 | /* Intialize to defaults. Do so even before the MATCH_NO check so that in | |
7050 | this case the defaults are in there. */ | |
7051 | ba->access = ACCESS_UNKNOWN; | |
7052 | ba->pass_arg = NULL; | |
7053 | ba->pass_arg_num = 0; | |
7054 | ba->nopass = 0; | |
7055 | ba->non_overridable = 0; | |
61c3b81d | 7056 | ba->deferred = 0; |
fe9b08a2 | 7057 | ba->ppc = ppc; |
7fd88f6e | 7058 | |
7059 | /* If we find a comma, we believe there are binding attributes. */ | |
fe9b08a2 | 7060 | m = gfc_match_char (','); |
7061 | if (m == MATCH_NO) | |
7062 | goto done; | |
7fd88f6e | 7063 | |
7064 | do | |
7065 | { | |
e2f06a48 | 7066 | /* Access specifier. */ |
7067 | ||
7068 | m = gfc_match (" public"); | |
7fd88f6e | 7069 | if (m == MATCH_ERROR) |
7070 | goto error; | |
7071 | if (m == MATCH_YES) | |
7072 | { | |
e2f06a48 | 7073 | if (ba->access != ACCESS_UNKNOWN) |
7fd88f6e | 7074 | { |
e2f06a48 | 7075 | gfc_error ("Duplicate access-specifier at %C"); |
7fd88f6e | 7076 | goto error; |
7077 | } | |
7078 | ||
e2f06a48 | 7079 | ba->access = ACCESS_PUBLIC; |
7fd88f6e | 7080 | continue; |
7081 | } | |
7082 | ||
e2f06a48 | 7083 | m = gfc_match (" private"); |
7fd88f6e | 7084 | if (m == MATCH_ERROR) |
7085 | goto error; | |
7086 | if (m == MATCH_YES) | |
7087 | { | |
e2f06a48 | 7088 | if (ba->access != ACCESS_UNKNOWN) |
7fd88f6e | 7089 | { |
e2f06a48 | 7090 | gfc_error ("Duplicate access-specifier at %C"); |
7fd88f6e | 7091 | goto error; |
7092 | } | |
7093 | ||
e2f06a48 | 7094 | ba->access = ACCESS_PRIVATE; |
7fd88f6e | 7095 | continue; |
7096 | } | |
7097 | ||
e2f06a48 | 7098 | /* If inside GENERIC, the following is not allowed. */ |
7099 | if (!generic) | |
7fd88f6e | 7100 | { |
7fd88f6e | 7101 | |
e2f06a48 | 7102 | /* NOPASS flag. */ |
7103 | m = gfc_match (" nopass"); | |
7104 | if (m == MATCH_ERROR) | |
7105 | goto error; | |
7106 | if (m == MATCH_YES) | |
7fd88f6e | 7107 | { |
e2f06a48 | 7108 | if (found_passing) |
7109 | { | |
7110 | gfc_error ("Binding attributes already specify passing," | |
7111 | " illegal NOPASS at %C"); | |
7112 | goto error; | |
7113 | } | |
7114 | ||
7115 | found_passing = true; | |
7116 | ba->nopass = 1; | |
7117 | continue; | |
7fd88f6e | 7118 | } |
7119 | ||
e2f06a48 | 7120 | /* PASS possibly including argument. */ |
7121 | m = gfc_match (" pass"); | |
7122 | if (m == MATCH_ERROR) | |
7123 | goto error; | |
7124 | if (m == MATCH_YES) | |
7fd88f6e | 7125 | { |
e2f06a48 | 7126 | char arg[GFC_MAX_SYMBOL_LEN + 1]; |
7127 | ||
7128 | if (found_passing) | |
7129 | { | |
7130 | gfc_error ("Binding attributes already specify passing," | |
7131 | " illegal PASS at %C"); | |
7132 | goto error; | |
7133 | } | |
7134 | ||
7135 | m = gfc_match (" ( %n )", arg); | |
7136 | if (m == MATCH_ERROR) | |
7137 | goto error; | |
7138 | if (m == MATCH_YES) | |
fe9b08a2 | 7139 | ba->pass_arg = gfc_get_string (arg); |
e2f06a48 | 7140 | gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL)); |
7141 | ||
7142 | found_passing = true; | |
7143 | ba->nopass = 0; | |
7144 | continue; | |
7fd88f6e | 7145 | } |
7146 | ||
64e93293 | 7147 | if (ppc) |
7148 | { | |
7149 | /* POINTER flag. */ | |
7150 | m = gfc_match (" pointer"); | |
7151 | if (m == MATCH_ERROR) | |
7152 | goto error; | |
7153 | if (m == MATCH_YES) | |
7154 | { | |
7155 | if (seen_ptr) | |
7156 | { | |
7157 | gfc_error ("Duplicate POINTER attribute at %C"); | |
7158 | goto error; | |
7159 | } | |
7160 | ||
7161 | seen_ptr = true; | |
64e93293 | 7162 | continue; |
7163 | } | |
7164 | } | |
7165 | else | |
7166 | { | |
7167 | /* NON_OVERRIDABLE flag. */ | |
7168 | m = gfc_match (" non_overridable"); | |
7169 | if (m == MATCH_ERROR) | |
7170 | goto error; | |
7171 | if (m == MATCH_YES) | |
7172 | { | |
7173 | if (ba->non_overridable) | |
7174 | { | |
7175 | gfc_error ("Duplicate NON_OVERRIDABLE at %C"); | |
7176 | goto error; | |
7177 | } | |
7178 | ||
7179 | ba->non_overridable = 1; | |
7180 | continue; | |
7181 | } | |
7182 | ||
7183 | /* DEFERRED flag. */ | |
7184 | m = gfc_match (" deferred"); | |
7185 | if (m == MATCH_ERROR) | |
7186 | goto error; | |
7187 | if (m == MATCH_YES) | |
7188 | { | |
7189 | if (ba->deferred) | |
7190 | { | |
7191 | gfc_error ("Duplicate DEFERRED at %C"); | |
7192 | goto error; | |
7193 | } | |
7194 | ||
7195 | ba->deferred = 1; | |
7196 | continue; | |
7197 | } | |
7198 | } | |
7199 | ||
7fd88f6e | 7200 | } |
7201 | ||
7202 | /* Nothing matching found. */ | |
e2f06a48 | 7203 | if (generic) |
7204 | gfc_error ("Expected access-specifier at %C"); | |
7205 | else | |
7206 | gfc_error ("Expected binding attribute at %C"); | |
7fd88f6e | 7207 | goto error; |
7208 | } | |
7209 | while (gfc_match_char (',') == MATCH_YES); | |
7210 | ||
61c3b81d | 7211 | /* NON_OVERRIDABLE and DEFERRED exclude themselves. */ |
7212 | if (ba->non_overridable && ba->deferred) | |
7213 | { | |
7214 | gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C"); | |
7215 | goto error; | |
7216 | } | |
7217 | ||
fe9b08a2 | 7218 | m = MATCH_YES; |
7219 | ||
7220 | done: | |
e2f06a48 | 7221 | if (ba->access == ACCESS_UNKNOWN) |
7222 | ba->access = gfc_typebound_default_access; | |
7223 | ||
64e93293 | 7224 | if (ppc && !seen_ptr) |
7225 | { | |
7226 | gfc_error ("POINTER attribute is required for procedure pointer component" | |
7227 | " at %C"); | |
7228 | goto error; | |
7229 | } | |
7230 | ||
fe9b08a2 | 7231 | return m; |
7fd88f6e | 7232 | |
7233 | error: | |
7fd88f6e | 7234 | return MATCH_ERROR; |
7235 | } | |
7236 | ||
7237 | ||
7238 | /* Match a PROCEDURE specific binding inside a derived type. */ | |
7239 | ||
7240 | static match | |
7241 | match_procedure_in_type (void) | |
7242 | { | |
7243 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7244 | char target_buf[GFC_MAX_SYMBOL_LEN + 1]; | |
61c3b81d | 7245 | char* target = NULL; |
7fd88f6e | 7246 | gfc_typebound_proc* tb; |
7247 | bool seen_colons; | |
7248 | bool seen_attrs; | |
7249 | match m; | |
7250 | gfc_symtree* stree; | |
7251 | gfc_namespace* ns; | |
7252 | gfc_symbol* block; | |
7253 | ||
7254 | /* Check current state. */ | |
7255 | gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS); | |
7256 | block = gfc_state_stack->previous->sym; | |
7257 | gcc_assert (block); | |
7258 | ||
61c3b81d | 7259 | /* Try to match PROCEDURE(interface). */ |
7fd88f6e | 7260 | if (gfc_match (" (") == MATCH_YES) |
7261 | { | |
61c3b81d | 7262 | m = gfc_match_name (target_buf); |
7263 | if (m == MATCH_ERROR) | |
7264 | return m; | |
7265 | if (m != MATCH_YES) | |
7266 | { | |
7267 | gfc_error ("Interface-name expected after '(' at %C"); | |
7268 | return MATCH_ERROR; | |
7269 | } | |
7270 | ||
7271 | if (gfc_match (" )") != MATCH_YES) | |
7272 | { | |
7273 | gfc_error ("')' expected at %C"); | |
7274 | return MATCH_ERROR; | |
7275 | } | |
7276 | ||
7277 | target = target_buf; | |
7fd88f6e | 7278 | } |
7279 | ||
7280 | /* Construct the data structure. */ | |
930fe1de | 7281 | tb = gfc_get_typebound_proc (); |
7fd88f6e | 7282 | tb->where = gfc_current_locus; |
e2f06a48 | 7283 | tb->is_generic = 0; |
7fd88f6e | 7284 | |
7285 | /* Match binding attributes. */ | |
64e93293 | 7286 | m = match_binding_attributes (tb, false, false); |
7fd88f6e | 7287 | if (m == MATCH_ERROR) |
7288 | return m; | |
7289 | seen_attrs = (m == MATCH_YES); | |
7290 | ||
61c3b81d | 7291 | /* Check that attribute DEFERRED is given iff an interface is specified, which |
7292 | means target != NULL. */ | |
7293 | if (tb->deferred && !target) | |
7294 | { | |
7295 | gfc_error ("Interface must be specified for DEFERRED binding at %C"); | |
7296 | return MATCH_ERROR; | |
7297 | } | |
7298 | if (target && !tb->deferred) | |
7299 | { | |
7300 | gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED"); | |
7301 | return MATCH_ERROR; | |
7302 | } | |
7303 | ||
7fd88f6e | 7304 | /* Match the colons. */ |
7305 | m = gfc_match (" ::"); | |
7306 | if (m == MATCH_ERROR) | |
7307 | return m; | |
7308 | seen_colons = (m == MATCH_YES); | |
7309 | if (seen_attrs && !seen_colons) | |
7310 | { | |
7311 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
7312 | return MATCH_ERROR; | |
7313 | } | |
7314 | ||
7315 | /* Match the binding name. */ | |
7316 | m = gfc_match_name (name); | |
7317 | if (m == MATCH_ERROR) | |
7318 | return m; | |
7319 | if (m == MATCH_NO) | |
7320 | { | |
7321 | gfc_error ("Expected binding name at %C"); | |
7322 | return MATCH_ERROR; | |
7323 | } | |
7324 | ||
7325 | /* Try to match the '=> target', if it's there. */ | |
7fd88f6e | 7326 | m = gfc_match (" =>"); |
7327 | if (m == MATCH_ERROR) | |
7328 | return m; | |
7329 | if (m == MATCH_YES) | |
7330 | { | |
61c3b81d | 7331 | if (tb->deferred) |
7332 | { | |
7333 | gfc_error ("'=> target' is invalid for DEFERRED binding at %C"); | |
7334 | return MATCH_ERROR; | |
7335 | } | |
7336 | ||
7fd88f6e | 7337 | if (!seen_colons) |
7338 | { | |
7339 | gfc_error ("'::' needed in PROCEDURE binding with explicit target" | |
7340 | " at %C"); | |
7341 | return MATCH_ERROR; | |
7342 | } | |
7343 | ||
7344 | m = gfc_match_name (target_buf); | |
7345 | if (m == MATCH_ERROR) | |
7346 | return m; | |
7347 | if (m == MATCH_NO) | |
7348 | { | |
7349 | gfc_error ("Expected binding target after '=>' at %C"); | |
7350 | return MATCH_ERROR; | |
7351 | } | |
7352 | target = target_buf; | |
7353 | } | |
7354 | ||
7355 | /* Now we should have the end. */ | |
7356 | m = gfc_match_eos (); | |
7357 | if (m == MATCH_ERROR) | |
7358 | return m; | |
7359 | if (m == MATCH_NO) | |
7360 | { | |
7361 | gfc_error ("Junk after PROCEDURE declaration at %C"); | |
7362 | return MATCH_ERROR; | |
7363 | } | |
7364 | ||
7365 | /* If no target was found, it has the same name as the binding. */ | |
7366 | if (!target) | |
7367 | target = name; | |
7368 | ||
7369 | /* Get the namespace to insert the symbols into. */ | |
7370 | ns = block->f2k_derived; | |
7371 | gcc_assert (ns); | |
7372 | ||
61c3b81d | 7373 | /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */ |
7374 | if (tb->deferred && !block->attr.abstract) | |
7375 | { | |
7376 | gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT", | |
7377 | block->name); | |
7378 | return MATCH_ERROR; | |
7379 | } | |
7380 | ||
7fd88f6e | 7381 | /* See if we already have a binding with this name in the symtree which would |
e2f06a48 | 7382 | be an error. If a GENERIC already targetted this binding, it may be |
7383 | already there but then typebound is still NULL. */ | |
3323e9b1 | 7384 | stree = gfc_find_symtree (ns->tb_sym_root, name); |
7385 | if (stree && stree->n.tb) | |
7fd88f6e | 7386 | { |
7387 | gfc_error ("There's already a procedure with binding name '%s' for the" | |
7388 | " derived type '%s' at %C", name, block->name); | |
7389 | return MATCH_ERROR; | |
7390 | } | |
7391 | ||
7392 | /* Insert it and set attributes. */ | |
3323e9b1 | 7393 | |
7394 | if (!stree) | |
7395 | { | |
7396 | stree = gfc_new_symtree (&ns->tb_sym_root, name); | |
7397 | gcc_assert (stree); | |
7398 | } | |
7399 | stree->n.tb = tb; | |
7400 | ||
36b0a1b0 | 7401 | if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific, false)) |
7fd88f6e | 7402 | return MATCH_ERROR; |
e2f06a48 | 7403 | gfc_set_sym_referenced (tb->u.specific->n.sym); |
7fd88f6e | 7404 | |
7405 | return MATCH_YES; | |
7406 | } | |
7407 | ||
7408 | ||
e2f06a48 | 7409 | /* Match a GENERIC procedure binding inside a derived type. */ |
7410 | ||
7411 | match | |
7412 | gfc_match_generic (void) | |
7413 | { | |
7414 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
a36eb9ee | 7415 | char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */ |
e2f06a48 | 7416 | gfc_symbol* block; |
7417 | gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */ | |
7418 | gfc_typebound_proc* tb; | |
e2f06a48 | 7419 | gfc_namespace* ns; |
a36eb9ee | 7420 | interface_type op_type; |
7421 | gfc_intrinsic_op op; | |
e2f06a48 | 7422 | match m; |
7423 | ||
7424 | /* Check current state. */ | |
7425 | if (gfc_current_state () == COMP_DERIVED) | |
7426 | { | |
7427 | gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS"); | |
7428 | return MATCH_ERROR; | |
7429 | } | |
7430 | if (gfc_current_state () != COMP_DERIVED_CONTAINS) | |
7431 | return MATCH_NO; | |
7432 | block = gfc_state_stack->previous->sym; | |
7433 | ns = block->f2k_derived; | |
7434 | gcc_assert (block && ns); | |
7435 | ||
7436 | /* See if we get an access-specifier. */ | |
64e93293 | 7437 | m = match_binding_attributes (&tbattr, true, false); |
e2f06a48 | 7438 | if (m == MATCH_ERROR) |
7439 | goto error; | |
7440 | ||
7441 | /* Now the colons, those are required. */ | |
7442 | if (gfc_match (" ::") != MATCH_YES) | |
7443 | { | |
7444 | gfc_error ("Expected '::' at %C"); | |
7445 | goto error; | |
7446 | } | |
7447 | ||
a36eb9ee | 7448 | /* Match the binding name; depending on type (operator / generic) format |
7449 | it for future error messages into bind_name. */ | |
7450 | ||
7451 | m = gfc_match_generic_spec (&op_type, name, &op); | |
e2f06a48 | 7452 | if (m == MATCH_ERROR) |
7453 | return MATCH_ERROR; | |
7454 | if (m == MATCH_NO) | |
7455 | { | |
a36eb9ee | 7456 | gfc_error ("Expected generic name or operator descriptor at %C"); |
e2f06a48 | 7457 | goto error; |
7458 | } | |
7459 | ||
a36eb9ee | 7460 | switch (op_type) |
e2f06a48 | 7461 | { |
a36eb9ee | 7462 | case INTERFACE_GENERIC: |
7463 | snprintf (bind_name, sizeof (bind_name), "%s", name); | |
7464 | break; | |
7465 | ||
7466 | case INTERFACE_USER_OP: | |
7467 | snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name); | |
7468 | break; | |
7469 | ||
7470 | case INTERFACE_INTRINSIC_OP: | |
7471 | snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)", | |
7472 | gfc_op2string (op)); | |
7473 | break; | |
7474 | ||
7475 | default: | |
7476 | gcc_unreachable (); | |
7477 | } | |
3323e9b1 | 7478 | |
a36eb9ee | 7479 | /* Match the required =>. */ |
7480 | if (gfc_match (" =>") != MATCH_YES) | |
7481 | { | |
7482 | gfc_error ("Expected '=>' at %C"); | |
7483 | goto error; | |
7484 | } | |
7485 | ||
7486 | /* Try to find existing GENERIC binding with this name / for this operator; | |
7487 | if there is something, check that it is another GENERIC and then extend | |
7488 | it rather than building a new node. Otherwise, create it and put it | |
7489 | at the right position. */ | |
7490 | ||
7491 | switch (op_type) | |
7492 | { | |
7493 | case INTERFACE_USER_OP: | |
7494 | case INTERFACE_GENERIC: | |
7495 | { | |
7496 | const bool is_op = (op_type == INTERFACE_USER_OP); | |
7497 | gfc_symtree* st; | |
7498 | ||
7499 | st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name); | |
7500 | if (st) | |
7501 | { | |
7502 | tb = st->n.tb; | |
7503 | gcc_assert (tb); | |
7504 | } | |
7505 | else | |
7506 | tb = NULL; | |
7507 | ||
7508 | break; | |
7509 | } | |
7510 | ||
7511 | case INTERFACE_INTRINSIC_OP: | |
7512 | tb = ns->tb_op[op]; | |
7513 | break; | |
7514 | ||
7515 | default: | |
7516 | gcc_unreachable (); | |
7517 | } | |
7518 | ||
7519 | if (tb) | |
7520 | { | |
3323e9b1 | 7521 | if (!tb->is_generic) |
e2f06a48 | 7522 | { |
a36eb9ee | 7523 | gcc_assert (op_type == INTERFACE_GENERIC); |
e2f06a48 | 7524 | gfc_error ("There's already a non-generic procedure with binding name" |
7525 | " '%s' for the derived type '%s' at %C", | |
a36eb9ee | 7526 | bind_name, block->name); |
e2f06a48 | 7527 | goto error; |
7528 | } | |
7529 | ||
e2f06a48 | 7530 | if (tb->access != tbattr.access) |
7531 | { | |
7532 | gfc_error ("Binding at %C must have the same access as already" | |
a36eb9ee | 7533 | " defined binding '%s'", bind_name); |
e2f06a48 | 7534 | goto error; |
7535 | } | |
7536 | } | |
7537 | else | |
7538 | { | |
a36eb9ee | 7539 | tb = gfc_get_typebound_proc (); |
e2f06a48 | 7540 | tb->where = gfc_current_locus; |
7541 | tb->access = tbattr.access; | |
7542 | tb->is_generic = 1; | |
7543 | tb->u.generic = NULL; | |
a36eb9ee | 7544 | |
7545 | switch (op_type) | |
7546 | { | |
7547 | case INTERFACE_GENERIC: | |
7548 | case INTERFACE_USER_OP: | |
7549 | { | |
7550 | const bool is_op = (op_type == INTERFACE_USER_OP); | |
7551 | gfc_symtree* st; | |
7552 | ||
7553 | st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root, | |
7554 | name); | |
7555 | gcc_assert (st); | |
7556 | st->n.tb = tb; | |
7557 | ||
7558 | break; | |
7559 | } | |
7560 | ||
7561 | case INTERFACE_INTRINSIC_OP: | |
7562 | ns->tb_op[op] = tb; | |
7563 | break; | |
7564 | ||
7565 | default: | |
7566 | gcc_unreachable (); | |
7567 | } | |
e2f06a48 | 7568 | } |
7569 | ||
7570 | /* Now, match all following names as specific targets. */ | |
7571 | do | |
7572 | { | |
7573 | gfc_symtree* target_st; | |
7574 | gfc_tbp_generic* target; | |
7575 | ||
7576 | m = gfc_match_name (name); | |
7577 | if (m == MATCH_ERROR) | |
7578 | goto error; | |
7579 | if (m == MATCH_NO) | |
7580 | { | |
7581 | gfc_error ("Expected specific binding name at %C"); | |
7582 | goto error; | |
7583 | } | |
7584 | ||
3323e9b1 | 7585 | target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name); |
e2f06a48 | 7586 | |
7587 | /* See if this is a duplicate specification. */ | |
7588 | for (target = tb->u.generic; target; target = target->next) | |
7589 | if (target_st == target->specific_st) | |
7590 | { | |
7591 | gfc_error ("'%s' already defined as specific binding for the" | |
a36eb9ee | 7592 | " generic '%s' at %C", name, bind_name); |
e2f06a48 | 7593 | goto error; |
7594 | } | |
7595 | ||
e2f06a48 | 7596 | target = gfc_get_tbp_generic (); |
7597 | target->specific_st = target_st; | |
7598 | target->specific = NULL; | |
7599 | target->next = tb->u.generic; | |
7600 | tb->u.generic = target; | |
7601 | } | |
7602 | while (gfc_match (" ,") == MATCH_YES); | |
7603 | ||
7604 | /* Here should be the end. */ | |
7605 | if (gfc_match_eos () != MATCH_YES) | |
7606 | { | |
7607 | gfc_error ("Junk after GENERIC binding at %C"); | |
7608 | goto error; | |
7609 | } | |
7610 | ||
7611 | return MATCH_YES; | |
7612 | ||
7613 | error: | |
7614 | return MATCH_ERROR; | |
7615 | } | |
7616 | ||
7617 | ||
223f0f57 | 7618 | /* Match a FINAL declaration inside a derived type. */ |
7619 | ||
7620 | match | |
7621 | gfc_match_final_decl (void) | |
7622 | { | |
7623 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7624 | gfc_symbol* sym; | |
7625 | match m; | |
7626 | gfc_namespace* module_ns; | |
7627 | bool first, last; | |
7fd88f6e | 7628 | gfc_symbol* block; |
223f0f57 | 7629 | |
7fd88f6e | 7630 | if (gfc_state_stack->state != COMP_DERIVED_CONTAINS) |
223f0f57 | 7631 | { |
7632 | gfc_error ("FINAL declaration at %C must be inside a derived type " | |
7fd88f6e | 7633 | "CONTAINS section"); |
223f0f57 | 7634 | return MATCH_ERROR; |
7635 | } | |
7636 | ||
7fd88f6e | 7637 | block = gfc_state_stack->previous->sym; |
7638 | gcc_assert (block); | |
223f0f57 | 7639 | |
7fd88f6e | 7640 | if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous |
7641 | || gfc_state_stack->previous->previous->state != COMP_MODULE) | |
223f0f57 | 7642 | { |
7643 | gfc_error ("Derived type declaration with FINAL at %C must be in the" | |
7644 | " specification part of a MODULE"); | |
7645 | return MATCH_ERROR; | |
7646 | } | |
7647 | ||
7648 | module_ns = gfc_current_ns; | |
7649 | gcc_assert (module_ns); | |
7650 | gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE); | |
7651 | ||
7652 | /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */ | |
7653 | if (gfc_match (" ::") == MATCH_ERROR) | |
7654 | return MATCH_ERROR; | |
7655 | ||
7656 | /* Match the sequence of procedure names. */ | |
7657 | first = true; | |
7658 | last = false; | |
7659 | do | |
7660 | { | |
7661 | gfc_finalizer* f; | |
7662 | ||
7663 | if (first && gfc_match_eos () == MATCH_YES) | |
7664 | { | |
7665 | gfc_error ("Empty FINAL at %C"); | |
7666 | return MATCH_ERROR; | |
7667 | } | |
7668 | ||
7669 | m = gfc_match_name (name); | |
7670 | if (m == MATCH_NO) | |
7671 | { | |
7672 | gfc_error ("Expected module procedure name at %C"); | |
7673 | return MATCH_ERROR; | |
7674 | } | |
7675 | else if (m != MATCH_YES) | |
7676 | return MATCH_ERROR; | |
7677 | ||
7678 | if (gfc_match_eos () == MATCH_YES) | |
7679 | last = true; | |
7680 | if (!last && gfc_match_char (',') != MATCH_YES) | |
7681 | { | |
7682 | gfc_error ("Expected ',' at %C"); | |
7683 | return MATCH_ERROR; | |
7684 | } | |
7685 | ||
7686 | if (gfc_get_symbol (name, module_ns, &sym)) | |
7687 | { | |
7688 | gfc_error ("Unknown procedure name \"%s\" at %C", name); | |
7689 | return MATCH_ERROR; | |
7690 | } | |
7691 | ||
7692 | /* Mark the symbol as module procedure. */ | |
7693 | if (sym->attr.proc != PROC_MODULE | |
7694 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
7695 | sym->name, NULL) == FAILURE) | |
7696 | return MATCH_ERROR; | |
7697 | ||
7698 | /* Check if we already have this symbol in the list, this is an error. */ | |
7fd88f6e | 7699 | for (f = block->f2k_derived->finalizers; f; f = f->next) |
e449e4dd | 7700 | if (f->proc_sym == sym) |
223f0f57 | 7701 | { |
7702 | gfc_error ("'%s' at %C is already defined as FINAL procedure!", | |
7703 | name); | |
7704 | return MATCH_ERROR; | |
7705 | } | |
7706 | ||
7707 | /* Add this symbol to the list of finalizers. */ | |
7fd88f6e | 7708 | gcc_assert (block->f2k_derived); |
223f0f57 | 7709 | ++sym->refs; |
48d8ad5a | 7710 | f = XCNEW (gfc_finalizer); |
e449e4dd | 7711 | f->proc_sym = sym; |
7712 | f->proc_tree = NULL; | |
223f0f57 | 7713 | f->where = gfc_current_locus; |
7fd88f6e | 7714 | f->next = block->f2k_derived->finalizers; |
7715 | block->f2k_derived->finalizers = f; | |
223f0f57 | 7716 | |
7717 | first = false; | |
7718 | } | |
7719 | while (!last); | |
7720 | ||
7721 | return MATCH_YES; | |
7722 | } | |
36b0a1b0 | 7723 | |
7724 | ||
7725 | const ext_attr_t ext_attr_list[] = { | |
7726 | { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" }, | |
7727 | { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" }, | |
7728 | { "cdecl", EXT_ATTR_CDECL, "cdecl" }, | |
7729 | { "stdcall", EXT_ATTR_STDCALL, "stdcall" }, | |
7730 | { "fastcall", EXT_ATTR_FASTCALL, "fastcall" }, | |
7731 | { NULL, EXT_ATTR_LAST, NULL } | |
7732 | }; | |
7733 | ||
7734 | /* Match a !GCC$ ATTRIBUTES statement of the form: | |
7735 | !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ... | |
7736 | When we come here, we have already matched the !GCC$ ATTRIBUTES string. | |
7737 | ||
7738 | TODO: We should support all GCC attributes using the same syntax for | |
7739 | the attribute list, i.e. the list in C | |
7740 | __attributes(( attribute-list )) | |
7741 | matches then | |
7742 | !GCC$ ATTRIBUTES attribute-list :: | |
7743 | Cf. c-parser.c's c_parser_attributes; the data can then directly be | |
7744 | saved into a TREE. | |
7745 | ||
7746 | As there is absolutely no risk of confusion, we should never return | |
7747 | MATCH_NO. */ | |
7748 | match | |
7749 | gfc_match_gcc_attributes (void) | |
7750 | { | |
7751 | symbol_attribute attr; | |
7752 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7753 | unsigned id; | |
7754 | gfc_symbol *sym; | |
7755 | match m; | |
7756 | ||
7757 | gfc_clear_attr (&attr); | |
7758 | for(;;) | |
7759 | { | |
7760 | char ch; | |
7761 | ||
7762 | if (gfc_match_name (name) != MATCH_YES) | |
7763 | return MATCH_ERROR; | |
7764 | ||
7765 | for (id = 0; id < EXT_ATTR_LAST; id++) | |
7766 | if (strcmp (name, ext_attr_list[id].name) == 0) | |
7767 | break; | |
7768 | ||
7769 | if (id == EXT_ATTR_LAST) | |
7770 | { | |
7771 | gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C"); | |
7772 | return MATCH_ERROR; | |
7773 | } | |
7774 | ||
de0c4488 | 7775 | if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus) |
36b0a1b0 | 7776 | == FAILURE) |
7777 | return MATCH_ERROR; | |
7778 | ||
7779 | gfc_gobble_whitespace (); | |
7780 | ch = gfc_next_ascii_char (); | |
7781 | if (ch == ':') | |
7782 | { | |
7783 | /* This is the successful exit condition for the loop. */ | |
7784 | if (gfc_next_ascii_char () == ':') | |
7785 | break; | |
7786 | } | |
7787 | ||
7788 | if (ch == ',') | |
7789 | continue; | |
7790 | ||
7791 | goto syntax; | |
7792 | } | |
7793 | ||
7794 | if (gfc_match_eos () == MATCH_YES) | |
7795 | goto syntax; | |
7796 | ||
7797 | for(;;) | |
7798 | { | |
7799 | m = gfc_match_name (name); | |
7800 | if (m != MATCH_YES) | |
7801 | return m; | |
7802 | ||
7803 | if (find_special (name, &sym, true)) | |
7804 | return MATCH_ERROR; | |
7805 | ||
7806 | sym->attr.ext_attr |= attr.ext_attr; | |
7807 | ||
7808 | if (gfc_match_eos () == MATCH_YES) | |
7809 | break; | |
7810 | ||
7811 | if (gfc_match_char (',') != MATCH_YES) | |
7812 | goto syntax; | |
7813 | } | |
7814 | ||
7815 | return MATCH_YES; | |
7816 | ||
7817 | syntax: | |
7818 | gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C"); | |
7819 | return MATCH_ERROR; | |
7820 | } |