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4ee9c684 | 1 | /* Declaration statement matcher |
f3db21c0 | 2 | Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 |
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" | |
4ee9c684 | 27 | |
cbbac028 | 28 | |
29 | /* Macros to access allocate memory for gfc_data_variable, | |
30 | gfc_data_value and gfc_data. */ | |
48d8ad5a | 31 | #define gfc_get_data_variable() XCNEW (gfc_data_variable) |
32 | #define gfc_get_data_value() XCNEW (gfc_data_value) | |
33 | #define gfc_get_data() XCNEW (gfc_data) | |
cbbac028 | 34 | |
35 | ||
36ae04f2 | 36 | /* This flag is set if an old-style length selector is matched |
4ee9c684 | 37 | during a type-declaration statement. */ |
38 | ||
39 | static int old_char_selector; | |
40 | ||
5739e54e | 41 | /* When variables acquire types and attributes from a declaration |
4ee9c684 | 42 | statement, they get them from the following static variables. The |
43 | first part of a declaration sets these variables and the second | |
44 | part copies these into symbol structures. */ | |
45 | ||
46 | static gfc_typespec current_ts; | |
47 | ||
48 | static symbol_attribute current_attr; | |
49 | static gfc_array_spec *current_as; | |
50 | static int colon_seen; | |
51 | ||
c5d33754 | 52 | /* The current binding label (if any). */ |
53 | static char curr_binding_label[GFC_MAX_BINDING_LABEL_LEN + 1]; | |
54 | /* Need to know how many identifiers are on the current data declaration | |
55 | line in case we're given the BIND(C) attribute with a NAME= specifier. */ | |
56 | static int num_idents_on_line; | |
57 | /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we | |
58 | can supply a name if the curr_binding_label is nil and NAME= was not. */ | |
59 | static int has_name_equals = 0; | |
60 | ||
3b6a4b41 | 61 | /* Initializer of the previous enumerator. */ |
62 | ||
63 | static gfc_expr *last_initializer; | |
64 | ||
65 | /* History of all the enumerators is maintained, so that | |
66 | kind values of all the enumerators could be updated depending | |
67 | upon the maximum initialized value. */ | |
68 | ||
69 | typedef struct enumerator_history | |
70 | { | |
71 | gfc_symbol *sym; | |
72 | gfc_expr *initializer; | |
73 | struct enumerator_history *next; | |
74 | } | |
75 | enumerator_history; | |
76 | ||
77 | /* Header of enum history chain. */ | |
78 | ||
79 | static enumerator_history *enum_history = NULL; | |
80 | ||
81 | /* Pointer of enum history node containing largest initializer. */ | |
82 | ||
83 | static enumerator_history *max_enum = NULL; | |
84 | ||
4ee9c684 | 85 | /* gfc_new_block points to the symbol of a newly matched block. */ |
86 | ||
87 | gfc_symbol *gfc_new_block; | |
88 | ||
077932f9 | 89 | bool gfc_matching_function; |
67a51c8e | 90 | |
4ee9c684 | 91 | |
b4f45d02 | 92 | /********************* DATA statement subroutines *********************/ |
93 | ||
1bfea7e8 | 94 | static bool in_match_data = false; |
95 | ||
96 | bool | |
97 | gfc_in_match_data (void) | |
98 | { | |
99 | return in_match_data; | |
100 | } | |
101 | ||
cbbac028 | 102 | static void |
103 | set_in_match_data (bool set_value) | |
1bfea7e8 | 104 | { |
105 | in_match_data = set_value; | |
106 | } | |
107 | ||
b4f45d02 | 108 | /* Free a gfc_data_variable structure and everything beneath it. */ |
109 | ||
110 | static void | |
1a9745d2 | 111 | free_variable (gfc_data_variable *p) |
b4f45d02 | 112 | { |
113 | gfc_data_variable *q; | |
114 | ||
115 | for (; p; p = q) | |
116 | { | |
117 | q = p->next; | |
118 | gfc_free_expr (p->expr); | |
119 | gfc_free_iterator (&p->iter, 0); | |
120 | free_variable (p->list); | |
b4f45d02 | 121 | gfc_free (p); |
122 | } | |
123 | } | |
124 | ||
125 | ||
126 | /* Free a gfc_data_value structure and everything beneath it. */ | |
127 | ||
128 | static void | |
1a9745d2 | 129 | free_value (gfc_data_value *p) |
b4f45d02 | 130 | { |
131 | gfc_data_value *q; | |
132 | ||
133 | for (; p; p = q) | |
134 | { | |
135 | q = p->next; | |
136 | gfc_free_expr (p->expr); | |
137 | gfc_free (p); | |
138 | } | |
139 | } | |
140 | ||
141 | ||
142 | /* Free a list of gfc_data structures. */ | |
143 | ||
144 | void | |
1a9745d2 | 145 | gfc_free_data (gfc_data *p) |
b4f45d02 | 146 | { |
147 | gfc_data *q; | |
148 | ||
149 | for (; p; p = q) | |
150 | { | |
151 | q = p->next; | |
b4f45d02 | 152 | free_variable (p->var); |
153 | free_value (p->value); | |
b4f45d02 | 154 | gfc_free (p); |
155 | } | |
156 | } | |
157 | ||
158 | ||
af29c1f0 | 159 | /* Free all data in a namespace. */ |
1a9745d2 | 160 | |
af29c1f0 | 161 | static void |
f6d0e37a | 162 | gfc_free_data_all (gfc_namespace *ns) |
af29c1f0 | 163 | { |
164 | gfc_data *d; | |
165 | ||
166 | for (;ns->data;) | |
167 | { | |
168 | d = ns->data->next; | |
169 | gfc_free (ns->data); | |
170 | ns->data = d; | |
171 | } | |
172 | } | |
173 | ||
174 | ||
b4f45d02 | 175 | static match var_element (gfc_data_variable *); |
176 | ||
177 | /* Match a list of variables terminated by an iterator and a right | |
178 | parenthesis. */ | |
179 | ||
180 | static match | |
1a9745d2 | 181 | var_list (gfc_data_variable *parent) |
b4f45d02 | 182 | { |
183 | gfc_data_variable *tail, var; | |
184 | match m; | |
185 | ||
186 | m = var_element (&var); | |
187 | if (m == MATCH_ERROR) | |
188 | return MATCH_ERROR; | |
189 | if (m == MATCH_NO) | |
190 | goto syntax; | |
191 | ||
192 | tail = gfc_get_data_variable (); | |
193 | *tail = var; | |
194 | ||
195 | parent->list = tail; | |
196 | ||
197 | for (;;) | |
198 | { | |
199 | if (gfc_match_char (',') != MATCH_YES) | |
200 | goto syntax; | |
201 | ||
202 | m = gfc_match_iterator (&parent->iter, 1); | |
203 | if (m == MATCH_YES) | |
204 | break; | |
205 | if (m == MATCH_ERROR) | |
206 | return MATCH_ERROR; | |
207 | ||
208 | m = var_element (&var); | |
209 | if (m == MATCH_ERROR) | |
210 | return MATCH_ERROR; | |
211 | if (m == MATCH_NO) | |
212 | goto syntax; | |
213 | ||
214 | tail->next = gfc_get_data_variable (); | |
215 | tail = tail->next; | |
216 | ||
217 | *tail = var; | |
218 | } | |
219 | ||
220 | if (gfc_match_char (')') != MATCH_YES) | |
221 | goto syntax; | |
222 | return MATCH_YES; | |
223 | ||
224 | syntax: | |
225 | gfc_syntax_error (ST_DATA); | |
226 | return MATCH_ERROR; | |
227 | } | |
228 | ||
229 | ||
230 | /* Match a single element in a data variable list, which can be a | |
231 | variable-iterator list. */ | |
232 | ||
233 | static match | |
c1977dbe | 234 | var_element (gfc_data_variable *new_var) |
b4f45d02 | 235 | { |
236 | match m; | |
237 | gfc_symbol *sym; | |
238 | ||
c1977dbe | 239 | memset (new_var, 0, sizeof (gfc_data_variable)); |
b4f45d02 | 240 | |
241 | if (gfc_match_char ('(') == MATCH_YES) | |
c1977dbe | 242 | return var_list (new_var); |
b4f45d02 | 243 | |
c1977dbe | 244 | m = gfc_match_variable (&new_var->expr, 0); |
b4f45d02 | 245 | if (m != MATCH_YES) |
246 | return m; | |
247 | ||
c1977dbe | 248 | sym = new_var->expr->symtree->n.sym; |
b4f45d02 | 249 | |
40de255b | 250 | /* Symbol should already have an associated type. */ |
251 | if (gfc_check_symbol_typed (sym, gfc_current_ns, | |
252 | false, gfc_current_locus) == FAILURE) | |
253 | return MATCH_ERROR; | |
254 | ||
1a9745d2 | 255 | if (!sym->attr.function && gfc_current_ns->parent |
256 | && gfc_current_ns->parent == sym->ns) | |
b4f45d02 | 257 | { |
c8df3e9c | 258 | gfc_error ("Host associated variable '%s' may not be in the DATA " |
7698a624 | 259 | "statement at %C", sym->name); |
b4f45d02 | 260 | return MATCH_ERROR; |
261 | } | |
262 | ||
c8df3e9c | 263 | if (gfc_current_state () != COMP_BLOCK_DATA |
1a9745d2 | 264 | && sym->attr.in_common |
265 | && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of " | |
266 | "common block variable '%s' in DATA statement at %C", | |
267 | sym->name) == FAILURE) | |
c8df3e9c | 268 | return MATCH_ERROR; |
b4f45d02 | 269 | |
c1977dbe | 270 | if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE) |
b4f45d02 | 271 | return MATCH_ERROR; |
272 | ||
273 | return MATCH_YES; | |
274 | } | |
275 | ||
276 | ||
277 | /* Match the top-level list of data variables. */ | |
278 | ||
279 | static match | |
1a9745d2 | 280 | top_var_list (gfc_data *d) |
b4f45d02 | 281 | { |
c1977dbe | 282 | gfc_data_variable var, *tail, *new_var; |
b4f45d02 | 283 | match m; |
284 | ||
285 | tail = NULL; | |
286 | ||
287 | for (;;) | |
288 | { | |
289 | m = var_element (&var); | |
290 | if (m == MATCH_NO) | |
291 | goto syntax; | |
292 | if (m == MATCH_ERROR) | |
293 | return MATCH_ERROR; | |
294 | ||
c1977dbe | 295 | new_var = gfc_get_data_variable (); |
296 | *new_var = var; | |
b4f45d02 | 297 | |
298 | if (tail == NULL) | |
c1977dbe | 299 | d->var = new_var; |
b4f45d02 | 300 | else |
c1977dbe | 301 | tail->next = new_var; |
b4f45d02 | 302 | |
c1977dbe | 303 | tail = new_var; |
b4f45d02 | 304 | |
305 | if (gfc_match_char ('/') == MATCH_YES) | |
306 | break; | |
307 | if (gfc_match_char (',') != MATCH_YES) | |
308 | goto syntax; | |
309 | } | |
310 | ||
311 | return MATCH_YES; | |
312 | ||
313 | syntax: | |
314 | gfc_syntax_error (ST_DATA); | |
af29c1f0 | 315 | gfc_free_data_all (gfc_current_ns); |
b4f45d02 | 316 | return MATCH_ERROR; |
317 | } | |
318 | ||
319 | ||
320 | static match | |
1a9745d2 | 321 | match_data_constant (gfc_expr **result) |
b4f45d02 | 322 | { |
323 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
324 | gfc_symbol *sym; | |
325 | gfc_expr *expr; | |
326 | match m; | |
096d4ad9 | 327 | locus old_loc; |
b4f45d02 | 328 | |
329 | m = gfc_match_literal_constant (&expr, 1); | |
330 | if (m == MATCH_YES) | |
331 | { | |
332 | *result = expr; | |
333 | return MATCH_YES; | |
334 | } | |
335 | ||
336 | if (m == MATCH_ERROR) | |
337 | return MATCH_ERROR; | |
338 | ||
339 | m = gfc_match_null (result); | |
340 | if (m != MATCH_NO) | |
341 | return m; | |
342 | ||
096d4ad9 | 343 | old_loc = gfc_current_locus; |
344 | ||
345 | /* Should this be a structure component, try to match it | |
346 | before matching a name. */ | |
347 | m = gfc_match_rvalue (result); | |
348 | if (m == MATCH_ERROR) | |
349 | return m; | |
350 | ||
351 | if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE) | |
352 | { | |
353 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
354 | m = MATCH_ERROR; | |
355 | return m; | |
356 | } | |
357 | ||
358 | gfc_current_locus = old_loc; | |
359 | ||
b4f45d02 | 360 | m = gfc_match_name (name); |
361 | if (m != MATCH_YES) | |
362 | return m; | |
363 | ||
364 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
365 | return MATCH_ERROR; | |
366 | ||
367 | if (sym == NULL | |
368 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
369 | { | |
370 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
371 | name); | |
372 | return MATCH_ERROR; | |
373 | } | |
374 | else if (sym->attr.flavor == FL_DERIVED) | |
ea94d76d | 375 | return gfc_match_structure_constructor (sym, result, false); |
b4f45d02 | 376 | |
f0a51891 | 377 | /* Check to see if the value is an initialization array expression. */ |
378 | if (sym->value->expr_type == EXPR_ARRAY) | |
379 | { | |
380 | gfc_current_locus = old_loc; | |
381 | ||
382 | m = gfc_match_init_expr (result); | |
383 | if (m == MATCH_ERROR) | |
384 | return m; | |
385 | ||
386 | if (m == MATCH_YES) | |
387 | { | |
388 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
389 | m = MATCH_ERROR; | |
390 | ||
391 | if ((*result)->expr_type == EXPR_CONSTANT) | |
392 | return m; | |
393 | else | |
394 | { | |
395 | gfc_error ("Invalid initializer %s in Data statement at %C", name); | |
396 | return MATCH_ERROR; | |
397 | } | |
398 | } | |
399 | } | |
400 | ||
b4f45d02 | 401 | *result = gfc_copy_expr (sym->value); |
402 | return MATCH_YES; | |
403 | } | |
404 | ||
405 | ||
406 | /* Match a list of values in a DATA statement. The leading '/' has | |
407 | already been seen at this point. */ | |
408 | ||
409 | static match | |
1a9745d2 | 410 | top_val_list (gfc_data *data) |
b4f45d02 | 411 | { |
c1977dbe | 412 | gfc_data_value *new_val, *tail; |
b4f45d02 | 413 | gfc_expr *expr; |
b4f45d02 | 414 | match m; |
415 | ||
416 | tail = NULL; | |
417 | ||
418 | for (;;) | |
419 | { | |
420 | m = match_data_constant (&expr); | |
421 | if (m == MATCH_NO) | |
422 | goto syntax; | |
423 | if (m == MATCH_ERROR) | |
424 | return MATCH_ERROR; | |
425 | ||
c1977dbe | 426 | new_val = gfc_get_data_value (); |
427 | mpz_init (new_val->repeat); | |
b4f45d02 | 428 | |
429 | if (tail == NULL) | |
c1977dbe | 430 | data->value = new_val; |
b4f45d02 | 431 | else |
c1977dbe | 432 | tail->next = new_val; |
b4f45d02 | 433 | |
c1977dbe | 434 | tail = new_val; |
b4f45d02 | 435 | |
436 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
437 | { | |
438 | tail->expr = expr; | |
7d74abfd | 439 | mpz_set_ui (tail->repeat, 1); |
b4f45d02 | 440 | } |
441 | else | |
442 | { | |
7d74abfd | 443 | if (expr->ts.type == BT_INTEGER) |
444 | mpz_set (tail->repeat, expr->value.integer); | |
b4f45d02 | 445 | gfc_free_expr (expr); |
b4f45d02 | 446 | |
447 | m = match_data_constant (&tail->expr); | |
448 | if (m == MATCH_NO) | |
449 | goto syntax; | |
450 | if (m == MATCH_ERROR) | |
451 | return MATCH_ERROR; | |
452 | } | |
453 | ||
454 | if (gfc_match_char ('/') == MATCH_YES) | |
455 | break; | |
456 | if (gfc_match_char (',') == MATCH_NO) | |
457 | goto syntax; | |
458 | } | |
459 | ||
460 | return MATCH_YES; | |
461 | ||
462 | syntax: | |
463 | gfc_syntax_error (ST_DATA); | |
af29c1f0 | 464 | gfc_free_data_all (gfc_current_ns); |
b4f45d02 | 465 | return MATCH_ERROR; |
466 | } | |
467 | ||
468 | ||
469 | /* Matches an old style initialization. */ | |
470 | ||
471 | static match | |
472 | match_old_style_init (const char *name) | |
473 | { | |
474 | match m; | |
475 | gfc_symtree *st; | |
344b937e | 476 | gfc_symbol *sym; |
b4f45d02 | 477 | gfc_data *newdata; |
478 | ||
479 | /* Set up data structure to hold initializers. */ | |
480 | gfc_find_sym_tree (name, NULL, 0, &st); | |
344b937e | 481 | sym = st->n.sym; |
482 | ||
b4f45d02 | 483 | newdata = gfc_get_data (); |
484 | newdata->var = gfc_get_data_variable (); | |
485 | newdata->var->expr = gfc_get_variable_expr (st); | |
5aed5db3 | 486 | newdata->where = gfc_current_locus; |
b4f45d02 | 487 | |
f6d0e37a | 488 | /* Match initial value list. This also eats the terminal '/'. */ |
b4f45d02 | 489 | m = top_val_list (newdata); |
490 | if (m != MATCH_YES) | |
491 | { | |
492 | gfc_free (newdata); | |
493 | return m; | |
494 | } | |
495 | ||
496 | if (gfc_pure (NULL)) | |
497 | { | |
498 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
499 | gfc_free (newdata); | |
500 | return MATCH_ERROR; | |
501 | } | |
502 | ||
344b937e | 503 | /* Mark the variable as having appeared in a data statement. */ |
504 | if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) | |
505 | { | |
506 | gfc_free (newdata); | |
507 | return MATCH_ERROR; | |
508 | } | |
509 | ||
b4f45d02 | 510 | /* Chain in namespace list of DATA initializers. */ |
511 | newdata->next = gfc_current_ns->data; | |
512 | gfc_current_ns->data = newdata; | |
513 | ||
514 | return m; | |
515 | } | |
516 | ||
1a9745d2 | 517 | |
b4f45d02 | 518 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
39fca56b | 519 | we are matching a DATA statement and are therefore issuing an error |
e14bee04 | 520 | if we encounter something unexpected, if not, we're trying to match |
fe06c0d5 | 521 | an old-style initialization expression of the form INTEGER I /2/. */ |
b4f45d02 | 522 | |
523 | match | |
524 | gfc_match_data (void) | |
525 | { | |
c1977dbe | 526 | gfc_data *new_data; |
b4f45d02 | 527 | match m; |
528 | ||
cbbac028 | 529 | set_in_match_data (true); |
1bfea7e8 | 530 | |
b4f45d02 | 531 | for (;;) |
532 | { | |
c1977dbe | 533 | new_data = gfc_get_data (); |
534 | new_data->where = gfc_current_locus; | |
b4f45d02 | 535 | |
c1977dbe | 536 | m = top_var_list (new_data); |
b4f45d02 | 537 | if (m != MATCH_YES) |
538 | goto cleanup; | |
539 | ||
c1977dbe | 540 | m = top_val_list (new_data); |
b4f45d02 | 541 | if (m != MATCH_YES) |
542 | goto cleanup; | |
543 | ||
c1977dbe | 544 | new_data->next = gfc_current_ns->data; |
545 | gfc_current_ns->data = new_data; | |
b4f45d02 | 546 | |
547 | if (gfc_match_eos () == MATCH_YES) | |
548 | break; | |
549 | ||
550 | gfc_match_char (','); /* Optional comma */ | |
551 | } | |
552 | ||
cbbac028 | 553 | set_in_match_data (false); |
1bfea7e8 | 554 | |
b4f45d02 | 555 | if (gfc_pure (NULL)) |
556 | { | |
557 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
558 | return MATCH_ERROR; | |
559 | } | |
560 | ||
561 | return MATCH_YES; | |
562 | ||
563 | cleanup: | |
cbbac028 | 564 | set_in_match_data (false); |
c1977dbe | 565 | gfc_free_data (new_data); |
b4f45d02 | 566 | return MATCH_ERROR; |
567 | } | |
568 | ||
569 | ||
570 | /************************ Declaration statements *********************/ | |
571 | ||
4ee9c684 | 572 | /* Match an intent specification. Since this can only happen after an |
573 | INTENT word, a legal intent-spec must follow. */ | |
574 | ||
575 | static sym_intent | |
576 | match_intent_spec (void) | |
577 | { | |
578 | ||
579 | if (gfc_match (" ( in out )") == MATCH_YES) | |
580 | return INTENT_INOUT; | |
581 | if (gfc_match (" ( in )") == MATCH_YES) | |
582 | return INTENT_IN; | |
583 | if (gfc_match (" ( out )") == MATCH_YES) | |
584 | return INTENT_OUT; | |
585 | ||
586 | gfc_error ("Bad INTENT specification at %C"); | |
587 | return INTENT_UNKNOWN; | |
588 | } | |
589 | ||
590 | ||
591 | /* Matches a character length specification, which is either a | |
592 | specification expression or a '*'. */ | |
593 | ||
594 | static match | |
1a9745d2 | 595 | char_len_param_value (gfc_expr **expr) |
4ee9c684 | 596 | { |
294d58d3 | 597 | match m; |
598 | ||
4ee9c684 | 599 | if (gfc_match_char ('*') == MATCH_YES) |
600 | { | |
601 | *expr = NULL; | |
602 | return MATCH_YES; | |
603 | } | |
604 | ||
294d58d3 | 605 | m = gfc_match_expr (expr); |
40de255b | 606 | |
607 | if (m == MATCH_YES | |
608 | && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE) | |
609 | return MATCH_ERROR; | |
610 | ||
294d58d3 | 611 | if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION) |
612 | { | |
613 | if ((*expr)->value.function.actual | |
614 | && (*expr)->value.function.actual->expr->symtree) | |
615 | { | |
616 | gfc_expr *e; | |
617 | e = (*expr)->value.function.actual->expr; | |
618 | if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE | |
619 | && e->expr_type == EXPR_VARIABLE) | |
620 | { | |
621 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) | |
622 | goto syntax; | |
623 | if (e->symtree->n.sym->ts.type == BT_CHARACTER | |
624 | && e->symtree->n.sym->ts.cl | |
625 | && e->symtree->n.sym->ts.cl->length->ts.type == BT_UNKNOWN) | |
626 | goto syntax; | |
627 | } | |
628 | } | |
629 | } | |
630 | return m; | |
631 | ||
632 | syntax: | |
633 | gfc_error ("Conflict in attributes of function argument at %C"); | |
634 | return MATCH_ERROR; | |
4ee9c684 | 635 | } |
636 | ||
637 | ||
638 | /* A character length is a '*' followed by a literal integer or a | |
639 | char_len_param_value in parenthesis. */ | |
640 | ||
641 | static match | |
1a9745d2 | 642 | match_char_length (gfc_expr **expr) |
4ee9c684 | 643 | { |
3bd3b616 | 644 | int length; |
4ee9c684 | 645 | match m; |
646 | ||
647 | m = gfc_match_char ('*'); | |
648 | if (m != MATCH_YES) | |
649 | return m; | |
650 | ||
3bd3b616 | 651 | m = gfc_match_small_literal_int (&length, NULL); |
4ee9c684 | 652 | if (m == MATCH_ERROR) |
653 | return m; | |
654 | ||
655 | if (m == MATCH_YES) | |
656 | { | |
657 | *expr = gfc_int_expr (length); | |
658 | return m; | |
659 | } | |
660 | ||
661 | if (gfc_match_char ('(') == MATCH_NO) | |
662 | goto syntax; | |
663 | ||
664 | m = char_len_param_value (expr); | |
077932f9 | 665 | if (m != MATCH_YES && gfc_matching_function) |
666 | { | |
667 | gfc_undo_symbols (); | |
668 | m = MATCH_YES; | |
669 | } | |
670 | ||
4ee9c684 | 671 | if (m == MATCH_ERROR) |
672 | return m; | |
673 | if (m == MATCH_NO) | |
674 | goto syntax; | |
675 | ||
676 | if (gfc_match_char (')') == MATCH_NO) | |
677 | { | |
678 | gfc_free_expr (*expr); | |
679 | *expr = NULL; | |
680 | goto syntax; | |
681 | } | |
682 | ||
683 | return MATCH_YES; | |
684 | ||
685 | syntax: | |
686 | gfc_error ("Syntax error in character length specification at %C"); | |
687 | return MATCH_ERROR; | |
688 | } | |
689 | ||
690 | ||
ee893be6 | 691 | /* Special subroutine for finding a symbol. Check if the name is found |
692 | in the current name space. If not, and we're compiling a function or | |
693 | subroutine and the parent compilation unit is an interface, then check | |
694 | to see if the name we've been given is the name of the interface | |
695 | (located in another namespace). */ | |
4ee9c684 | 696 | |
697 | static int | |
1a9745d2 | 698 | find_special (const char *name, gfc_symbol **result) |
4ee9c684 | 699 | { |
700 | gfc_state_data *s; | |
ee893be6 | 701 | int i; |
4ee9c684 | 702 | |
ee893be6 | 703 | i = gfc_get_symbol (name, NULL, result); |
e14bee04 | 704 | if (i == 0) |
ee893be6 | 705 | goto end; |
e14bee04 | 706 | |
4ee9c684 | 707 | if (gfc_current_state () != COMP_SUBROUTINE |
708 | && gfc_current_state () != COMP_FUNCTION) | |
ee893be6 | 709 | goto end; |
4ee9c684 | 710 | |
711 | s = gfc_state_stack->previous; | |
712 | if (s == NULL) | |
ee893be6 | 713 | goto end; |
4ee9c684 | 714 | |
715 | if (s->state != COMP_INTERFACE) | |
ee893be6 | 716 | goto end; |
4ee9c684 | 717 | if (s->sym == NULL) |
f6d0e37a | 718 | goto end; /* Nameless interface. */ |
4ee9c684 | 719 | |
720 | if (strcmp (name, s->sym->name) == 0) | |
721 | { | |
722 | *result = s->sym; | |
723 | return 0; | |
724 | } | |
725 | ||
ee893be6 | 726 | end: |
727 | return i; | |
4ee9c684 | 728 | } |
729 | ||
730 | ||
731 | /* Special subroutine for getting a symbol node associated with a | |
732 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
733 | symbol is created in the parent using with symtree node in the | |
734 | child unit pointing to the symbol. If the current namespace has no | |
735 | parent, then the symbol is just created in the current unit. */ | |
736 | ||
737 | static int | |
1a9745d2 | 738 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
4ee9c684 | 739 | { |
740 | gfc_symtree *st; | |
741 | gfc_symbol *sym; | |
2ddb8ed9 | 742 | int rc = 0; |
4ee9c684 | 743 | |
d77f260f | 744 | /* Module functions have to be left in their own namespace because |
745 | they have potentially (almost certainly!) already been referenced. | |
746 | In this sense, they are rather like external functions. This is | |
747 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
748 | space is set to point to the master function, so that the fake | |
749 | result mechanism can work. */ | |
750 | if (module_fcn_entry) | |
861d824f | 751 | { |
752 | /* Present if entry is declared to be a module procedure. */ | |
753 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); | |
c6a05992 | 754 | |
861d824f | 755 | if (*result == NULL) |
756 | rc = gfc_get_symbol (name, NULL, result); | |
a78f714d | 757 | else if (!gfc_get_symbol (name, NULL, &sym) && sym |
c6a05992 | 758 | && (*result)->ts.type == BT_UNKNOWN |
759 | && sym->attr.flavor == FL_UNKNOWN) | |
760 | /* Pick up the typespec for the entry, if declared in the function | |
761 | body. Note that this symbol is FL_UNKNOWN because it will | |
762 | only have appeared in a type declaration. The local symtree | |
763 | is set to point to the module symbol and a unique symtree | |
764 | to the local version. This latter ensures a correct clearing | |
765 | of the symbols. */ | |
a78f714d | 766 | { |
767 | /* If the ENTRY proceeds its specification, we need to ensure | |
768 | that this does not raise a "has no IMPLICIT type" error. */ | |
769 | if (sym->ts.type == BT_UNKNOWN) | |
2168078b | 770 | sym->attr.untyped = 1; |
a78f714d | 771 | |
2168078b | 772 | (*result)->ts = sym->ts; |
a78f714d | 773 | |
774 | /* Put the symbol in the procedure namespace so that, should | |
69b1505f | 775 | the ENTRY precede its specification, the specification |
a78f714d | 776 | can be applied. */ |
777 | (*result)->ns = gfc_current_ns; | |
778 | ||
779 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); | |
780 | st->n.sym = *result; | |
781 | st = gfc_get_unique_symtree (gfc_current_ns); | |
782 | st->n.sym = sym; | |
783 | } | |
861d824f | 784 | } |
858f9894 | 785 | else |
786 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
4ee9c684 | 787 | |
2ddb8ed9 | 788 | if (rc) |
789 | return rc; | |
790 | ||
858f9894 | 791 | sym = *result; |
c717e399 | 792 | gfc_current_ns->refs++; |
4ee9c684 | 793 | |
c1977dbe | 794 | if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE) |
858f9894 | 795 | { |
16f49153 | 796 | /* Trap another encompassed procedure with the same name. All |
797 | these conditions are necessary to avoid picking up an entry | |
798 | whose name clashes with that of the encompassing procedure; | |
799 | this is handled using gsymbols to register unique,globally | |
800 | accessible names. */ | |
858f9894 | 801 | if (sym->attr.flavor != 0 |
1a9745d2 | 802 | && sym->attr.proc != 0 |
803 | && (sym->attr.subroutine || sym->attr.function) | |
804 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
858f9894 | 805 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
806 | name, &sym->declared_at); | |
807 | ||
5720fd2f | 808 | /* Trap a procedure with a name the same as interface in the |
809 | encompassing scope. */ | |
810 | if (sym->attr.generic != 0 | |
db697236 | 811 | && (sym->attr.subroutine || sym->attr.function) |
812 | && !sym->attr.mod_proc) | |
5720fd2f | 813 | gfc_error_now ("Name '%s' at %C is already defined" |
814 | " as a generic interface at %L", | |
815 | name, &sym->declared_at); | |
816 | ||
858f9894 | 817 | /* Trap declarations of attributes in encompassing scope. The |
818 | signature for this is that ts.kind is set. Legitimate | |
819 | references only set ts.type. */ | |
820 | if (sym->ts.kind != 0 | |
1a9745d2 | 821 | && !sym->attr.implicit_type |
822 | && sym->attr.proc == 0 | |
823 | && gfc_current_ns->parent != NULL | |
824 | && sym->attr.access == 0 | |
825 | && !module_fcn_entry) | |
826 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
827 | "and must not have attributes declared at %L", | |
858f9894 | 828 | name, &sym->declared_at); |
829 | } | |
830 | ||
831 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
832 | return rc; | |
4ee9c684 | 833 | |
d77f260f | 834 | /* Module function entries will already have a symtree in |
835 | the current namespace but will need one at module level. */ | |
836 | if (module_fcn_entry) | |
861d824f | 837 | { |
838 | /* Present if entry is declared to be a module procedure. */ | |
839 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); | |
840 | if (st == NULL) | |
841 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
842 | } | |
d77f260f | 843 | else |
844 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
4ee9c684 | 845 | |
4ee9c684 | 846 | st->n.sym = sym; |
847 | sym->refs++; | |
848 | ||
f6d0e37a | 849 | /* See if the procedure should be a module procedure. */ |
4ee9c684 | 850 | |
d77f260f | 851 | if (((sym->ns->proc_name != NULL |
861d824f | 852 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
853 | && sym->attr.proc != PROC_MODULE) | |
854 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) | |
855 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
856 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 857 | rc = 2; |
858 | ||
859 | return rc; | |
860 | } | |
861 | ||
862 | ||
c5d33754 | 863 | /* Verify that the given symbol representing a parameter is C |
864 | interoperable, by checking to see if it was marked as such after | |
865 | its declaration. If the given symbol is not interoperable, a | |
866 | warning is reported, thus removing the need to return the status to | |
867 | the calling function. The standard does not require the user use | |
868 | one of the iso_c_binding named constants to declare an | |
869 | interoperable parameter, but we can't be sure if the param is C | |
870 | interop or not if the user doesn't. For example, integer(4) may be | |
871 | legal Fortran, but doesn't have meaning in C. It may interop with | |
872 | a number of the C types, which causes a problem because the | |
873 | compiler can't know which one. This code is almost certainly not | |
874 | portable, and the user will get what they deserve if the C type | |
875 | across platforms isn't always interoperable with integer(4). If | |
876 | the user had used something like integer(c_int) or integer(c_long), | |
877 | the compiler could have automatically handled the varying sizes | |
878 | across platforms. */ | |
879 | ||
f6bb8f4b | 880 | gfc_try |
c5d33754 | 881 | verify_c_interop_param (gfc_symbol *sym) |
882 | { | |
883 | int is_c_interop = 0; | |
f6bb8f4b | 884 | gfc_try retval = SUCCESS; |
c5d33754 | 885 | |
886 | /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). | |
887 | Don't repeat the checks here. */ | |
888 | if (sym->attr.implicit_type) | |
889 | return SUCCESS; | |
890 | ||
891 | /* For subroutines or functions that are passed to a BIND(C) procedure, | |
892 | they're interoperable if they're BIND(C) and their params are all | |
893 | interoperable. */ | |
894 | if (sym->attr.flavor == FL_PROCEDURE) | |
895 | { | |
896 | if (sym->attr.is_bind_c == 0) | |
897 | { | |
898 | gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " | |
899 | "attribute to be C interoperable", sym->name, | |
900 | &(sym->declared_at)); | |
901 | ||
902 | return FAILURE; | |
903 | } | |
904 | else | |
905 | { | |
906 | if (sym->attr.is_c_interop == 1) | |
907 | /* We've already checked this procedure; don't check it again. */ | |
908 | return SUCCESS; | |
909 | else | |
910 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, | |
911 | sym->common_block); | |
912 | } | |
913 | } | |
914 | ||
915 | /* See if we've stored a reference to a procedure that owns sym. */ | |
916 | if (sym->ns != NULL && sym->ns->proc_name != NULL) | |
917 | { | |
918 | if (sym->ns->proc_name->attr.is_bind_c == 1) | |
919 | { | |
920 | is_c_interop = | |
209d3778 | 921 | (verify_c_interop (&(sym->ts)) |
c5d33754 | 922 | == SUCCESS ? 1 : 0); |
923 | ||
924 | if (is_c_interop != 1) | |
925 | { | |
926 | /* Make personalized messages to give better feedback. */ | |
927 | if (sym->ts.type == BT_DERIVED) | |
928 | gfc_error ("Type '%s' at %L is a parameter to the BIND(C) " | |
929 | " procedure '%s' but is not C interoperable " | |
930 | "because derived type '%s' is not C interoperable", | |
931 | sym->name, &(sym->declared_at), | |
932 | sym->ns->proc_name->name, | |
933 | sym->ts.derived->name); | |
934 | else | |
935 | gfc_warning ("Variable '%s' at %L is a parameter to the " | |
936 | "BIND(C) procedure '%s' but may not be C " | |
937 | "interoperable", | |
938 | sym->name, &(sym->declared_at), | |
939 | sym->ns->proc_name->name); | |
940 | } | |
e4eda3ec | 941 | |
942 | /* Character strings are only C interoperable if they have a | |
943 | length of 1. */ | |
944 | if (sym->ts.type == BT_CHARACTER) | |
945 | { | |
946 | gfc_charlen *cl = sym->ts.cl; | |
947 | if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT | |
948 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) | |
949 | { | |
950 | gfc_error ("Character argument '%s' at %L " | |
951 | "must be length 1 because " | |
952 | "procedure '%s' is BIND(C)", | |
953 | sym->name, &sym->declared_at, | |
954 | sym->ns->proc_name->name); | |
955 | retval = FAILURE; | |
956 | } | |
957 | } | |
958 | ||
c5d33754 | 959 | /* We have to make sure that any param to a bind(c) routine does |
960 | not have the allocatable, pointer, or optional attributes, | |
961 | according to J3/04-007, section 5.1. */ | |
962 | if (sym->attr.allocatable == 1) | |
963 | { | |
964 | gfc_error ("Variable '%s' at %L cannot have the " | |
965 | "ALLOCATABLE attribute because procedure '%s'" | |
966 | " is BIND(C)", sym->name, &(sym->declared_at), | |
967 | sym->ns->proc_name->name); | |
968 | retval = FAILURE; | |
969 | } | |
970 | ||
971 | if (sym->attr.pointer == 1) | |
972 | { | |
973 | gfc_error ("Variable '%s' at %L cannot have the " | |
974 | "POINTER attribute because procedure '%s'" | |
975 | " is BIND(C)", sym->name, &(sym->declared_at), | |
976 | sym->ns->proc_name->name); | |
977 | retval = FAILURE; | |
978 | } | |
979 | ||
980 | if (sym->attr.optional == 1) | |
981 | { | |
982 | gfc_error ("Variable '%s' at %L cannot have the " | |
983 | "OPTIONAL attribute because procedure '%s'" | |
984 | " is BIND(C)", sym->name, &(sym->declared_at), | |
985 | sym->ns->proc_name->name); | |
986 | retval = FAILURE; | |
987 | } | |
988 | ||
989 | /* Make sure that if it has the dimension attribute, that it is | |
990 | either assumed size or explicit shape. */ | |
991 | if (sym->as != NULL) | |
992 | { | |
993 | if (sym->as->type == AS_ASSUMED_SHAPE) | |
994 | { | |
995 | gfc_error ("Assumed-shape array '%s' at %L cannot be an " | |
996 | "argument to the procedure '%s' at %L because " | |
997 | "the procedure is BIND(C)", sym->name, | |
998 | &(sym->declared_at), sym->ns->proc_name->name, | |
999 | &(sym->ns->proc_name->declared_at)); | |
1000 | retval = FAILURE; | |
1001 | } | |
1002 | ||
1003 | if (sym->as->type == AS_DEFERRED) | |
1004 | { | |
1005 | gfc_error ("Deferred-shape array '%s' at %L cannot be an " | |
1006 | "argument to the procedure '%s' at %L because " | |
1007 | "the procedure is BIND(C)", sym->name, | |
1008 | &(sym->declared_at), sym->ns->proc_name->name, | |
1009 | &(sym->ns->proc_name->declared_at)); | |
1010 | retval = FAILURE; | |
1011 | } | |
1012 | } | |
1013 | } | |
1014 | } | |
1015 | ||
1016 | return retval; | |
1017 | } | |
1018 | ||
1019 | ||
1020 | /* Function called by variable_decl() that adds a name to the symbol table. */ | |
4ee9c684 | 1021 | |
f6bb8f4b | 1022 | static gfc_try |
1a9745d2 | 1023 | build_sym (const char *name, gfc_charlen *cl, |
1024 | gfc_array_spec **as, locus *var_locus) | |
4ee9c684 | 1025 | { |
1026 | symbol_attribute attr; | |
1027 | gfc_symbol *sym; | |
1028 | ||
ee893be6 | 1029 | if (gfc_get_symbol (name, NULL, &sym)) |
4ee9c684 | 1030 | return FAILURE; |
1031 | ||
f6d0e37a | 1032 | /* Start updating the symbol table. Add basic type attribute if present. */ |
4ee9c684 | 1033 | if (current_ts.type != BT_UNKNOWN |
1a9745d2 | 1034 | && (sym->attr.implicit_type == 0 |
1035 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
4ee9c684 | 1036 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
1037 | return FAILURE; | |
1038 | ||
1039 | if (sym->ts.type == BT_CHARACTER) | |
1040 | sym->ts.cl = cl; | |
1041 | ||
1042 | /* Add dimension attribute if present. */ | |
1043 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
1044 | return FAILURE; | |
1045 | *as = NULL; | |
1046 | ||
1047 | /* Add attribute to symbol. The copy is so that we can reset the | |
1048 | dimension attribute. */ | |
1049 | attr = current_attr; | |
1050 | attr.dimension = 0; | |
1051 | ||
1052 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
1053 | return FAILURE; | |
1054 | ||
c5d33754 | 1055 | /* Finish any work that may need to be done for the binding label, |
1056 | if it's a bind(c). The bind(c) attr is found before the symbol | |
1057 | is made, and before the symbol name (for data decls), so the | |
1058 | current_ts is holding the binding label, or nothing if the | |
1059 | name= attr wasn't given. Therefore, test here if we're dealing | |
1060 | with a bind(c) and make sure the binding label is set correctly. */ | |
1061 | if (sym->attr.is_bind_c == 1) | |
1062 | { | |
1063 | if (sym->binding_label[0] == '\0') | |
1064 | { | |
825718f9 | 1065 | /* Set the binding label and verify that if a NAME= was specified |
1066 | then only one identifier was in the entity-decl-list. */ | |
1067 | if (set_binding_label (sym->binding_label, sym->name, | |
1068 | num_idents_on_line) == FAILURE) | |
c5d33754 | 1069 | return FAILURE; |
1070 | } | |
1071 | } | |
1072 | ||
1073 | /* See if we know we're in a common block, and if it's a bind(c) | |
1074 | common then we need to make sure we're an interoperable type. */ | |
1075 | if (sym->attr.in_common == 1) | |
1076 | { | |
1077 | /* Test the common block object. */ | |
1078 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 | |
1079 | && sym->ts.is_c_interop != 1) | |
1080 | { | |
1081 | gfc_error_now ("Variable '%s' in common block '%s' at %C " | |
1082 | "must be declared with a C interoperable " | |
1083 | "kind since common block '%s' is BIND(C)", | |
1084 | sym->name, sym->common_block->name, | |
1085 | sym->common_block->name); | |
1086 | gfc_clear_error (); | |
1087 | } | |
1088 | } | |
1089 | ||
2457a77e | 1090 | sym->attr.implied_index = 0; |
1091 | ||
4ee9c684 | 1092 | return SUCCESS; |
1093 | } | |
1094 | ||
1a9745d2 | 1095 | |
a270dc8e | 1096 | /* Set character constant to the given length. The constant will be padded or |
d1a39099 | 1097 | truncated. If we're inside an array constructor without a typespec, we |
1098 | additionally check that all elements have the same length; check_len -1 | |
1099 | means no checking. */ | |
a270dc8e | 1100 | |
1101 | void | |
d1a39099 | 1102 | gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len) |
a270dc8e | 1103 | { |
c32f863c | 1104 | gfc_char_t *s; |
a270dc8e | 1105 | int slen; |
1106 | ||
1107 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
b44437b9 | 1108 | gcc_assert (expr->ts.type == BT_CHARACTER); |
a270dc8e | 1109 | |
1110 | slen = expr->value.character.length; | |
1111 | if (len != slen) | |
1112 | { | |
c32f863c | 1113 | s = gfc_get_wide_string (len + 1); |
1114 | memcpy (s, expr->value.character.string, | |
1115 | MIN (len, slen) * sizeof (gfc_char_t)); | |
a270dc8e | 1116 | if (len > slen) |
c32f863c | 1117 | gfc_wide_memset (&s[slen], ' ', len - slen); |
1bfea7e8 | 1118 | |
1119 | if (gfc_option.warn_character_truncation && slen > len) | |
1120 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
1121 | "(%d/%d)", &expr->where, slen, len); | |
1122 | ||
1123 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
1124 | initializers. */ | |
d1a39099 | 1125 | if (check_len != -1 && slen != check_len |
1126 | && !(gfc_option.allow_std & GFC_STD_GNU)) | |
1bfea7e8 | 1127 | gfc_error_now ("The CHARACTER elements of the array constructor " |
1128 | "at %L must have the same length (%d/%d)", | |
d1a39099 | 1129 | &expr->where, slen, check_len); |
1bfea7e8 | 1130 | |
89f528df | 1131 | s[len] = '\0'; |
a270dc8e | 1132 | gfc_free (expr->value.character.string); |
1133 | expr->value.character.string = s; | |
1134 | expr->value.character.length = len; | |
1135 | } | |
1136 | } | |
4ee9c684 | 1137 | |
3b6a4b41 | 1138 | |
e14bee04 | 1139 | /* Function to create and update the enumerator history |
3b6a4b41 | 1140 | using the information passed as arguments. |
e14bee04 | 1141 | Pointer "max_enum" is also updated, to point to |
1142 | enum history node containing largest initializer. | |
3b6a4b41 | 1143 | |
1144 | SYM points to the symbol node of enumerator. | |
f6d0e37a | 1145 | INIT points to its enumerator value. */ |
3b6a4b41 | 1146 | |
e14bee04 | 1147 | static void |
1a9745d2 | 1148 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
3b6a4b41 | 1149 | { |
1150 | enumerator_history *new_enum_history; | |
1151 | gcc_assert (sym != NULL && init != NULL); | |
1152 | ||
48d8ad5a | 1153 | new_enum_history = XCNEW (enumerator_history); |
3b6a4b41 | 1154 | |
1155 | new_enum_history->sym = sym; | |
1156 | new_enum_history->initializer = init; | |
1157 | new_enum_history->next = NULL; | |
1158 | ||
1159 | if (enum_history == NULL) | |
1160 | { | |
1161 | enum_history = new_enum_history; | |
1162 | max_enum = enum_history; | |
1163 | } | |
1164 | else | |
1165 | { | |
1166 | new_enum_history->next = enum_history; | |
1167 | enum_history = new_enum_history; | |
1168 | ||
e14bee04 | 1169 | if (mpz_cmp (max_enum->initializer->value.integer, |
3b6a4b41 | 1170 | new_enum_history->initializer->value.integer) < 0) |
1a9745d2 | 1171 | max_enum = new_enum_history; |
3b6a4b41 | 1172 | } |
1173 | } | |
1174 | ||
1175 | ||
e14bee04 | 1176 | /* Function to free enum kind history. */ |
3b6a4b41 | 1177 | |
e14bee04 | 1178 | void |
1a9745d2 | 1179 | gfc_free_enum_history (void) |
3b6a4b41 | 1180 | { |
e14bee04 | 1181 | enumerator_history *current = enum_history; |
1182 | enumerator_history *next; | |
3b6a4b41 | 1183 | |
1184 | while (current != NULL) | |
1185 | { | |
1186 | next = current->next; | |
1187 | gfc_free (current); | |
1188 | current = next; | |
1189 | } | |
1190 | max_enum = NULL; | |
1191 | enum_history = NULL; | |
1192 | } | |
1193 | ||
1194 | ||
4ee9c684 | 1195 | /* Function called by variable_decl() that adds an initialization |
1196 | expression to a symbol. */ | |
1197 | ||
f6bb8f4b | 1198 | static gfc_try |
f6d0e37a | 1199 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) |
4ee9c684 | 1200 | { |
1201 | symbol_attribute attr; | |
1202 | gfc_symbol *sym; | |
1203 | gfc_expr *init; | |
1204 | ||
1205 | init = *initp; | |
1206 | if (find_special (name, &sym)) | |
1207 | return FAILURE; | |
1208 | ||
1209 | attr = sym->attr; | |
1210 | ||
1211 | /* If this symbol is confirming an implicit parameter type, | |
1212 | then an initialization expression is not allowed. */ | |
1213 | if (attr.flavor == FL_PARAMETER | |
1214 | && sym->value != NULL | |
1215 | && *initp != NULL) | |
1216 | { | |
1217 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
1218 | sym->name); | |
1219 | return FAILURE; | |
1220 | } | |
1221 | ||
1222 | if (init == NULL) | |
1223 | { | |
1224 | /* An initializer is required for PARAMETER declarations. */ | |
1225 | if (attr.flavor == FL_PARAMETER) | |
1226 | { | |
1227 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
1228 | return FAILURE; | |
1229 | } | |
1230 | } | |
1231 | else | |
1232 | { | |
1233 | /* If a variable appears in a DATA block, it cannot have an | |
b97f1a18 | 1234 | initializer. */ |
4ee9c684 | 1235 | if (sym->attr.data) |
1236 | { | |
1a9745d2 | 1237 | gfc_error ("Variable '%s' at %C with an initializer already " |
1238 | "appears in a DATA statement", sym->name); | |
4ee9c684 | 1239 | return FAILURE; |
1240 | } | |
1241 | ||
cca3db55 | 1242 | /* Check if the assignment can happen. This has to be put off |
1243 | until later for a derived type variable. */ | |
4ee9c684 | 1244 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
1245 | && gfc_check_assign_symbol (sym, init) == FAILURE) | |
1246 | return FAILURE; | |
1247 | ||
a270dc8e | 1248 | if (sym->ts.type == BT_CHARACTER && sym->ts.cl) |
1249 | { | |
1250 | /* Update symbol character length according initializer. */ | |
1251 | if (sym->ts.cl->length == NULL) | |
1252 | { | |
03c2a028 | 1253 | int clen; |
f6d0e37a | 1254 | /* If there are multiple CHARACTER variables declared on the |
1255 | same line, we don't want them to share the same length. */ | |
ea13b9b7 | 1256 | sym->ts.cl = gfc_get_charlen (); |
1257 | sym->ts.cl->next = gfc_current_ns->cl_list; | |
1258 | gfc_current_ns->cl_list = sym->ts.cl; | |
e9c873a4 | 1259 | |
03c2a028 | 1260 | if (sym->attr.flavor == FL_PARAMETER) |
1261 | { | |
1262 | if (init->expr_type == EXPR_CONSTANT) | |
1263 | { | |
1264 | clen = init->value.character.length; | |
1265 | sym->ts.cl->length = gfc_int_expr (clen); | |
1266 | } | |
1267 | else if (init->expr_type == EXPR_ARRAY) | |
1268 | { | |
1269 | gfc_expr *p = init->value.constructor->expr; | |
1270 | clen = p->value.character.length; | |
1271 | sym->ts.cl->length = gfc_int_expr (clen); | |
1272 | } | |
1273 | else if (init->ts.cl && init->ts.cl->length) | |
1274 | sym->ts.cl->length = | |
1275 | gfc_copy_expr (sym->value->ts.cl->length); | |
1276 | } | |
a270dc8e | 1277 | } |
1278 | /* Update initializer character length according symbol. */ | |
1279 | else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT) | |
1280 | { | |
1281 | int len = mpz_get_si (sym->ts.cl->length->value.integer); | |
1282 | gfc_constructor * p; | |
1283 | ||
1284 | if (init->expr_type == EXPR_CONSTANT) | |
d1a39099 | 1285 | gfc_set_constant_character_len (len, init, -1); |
a270dc8e | 1286 | else if (init->expr_type == EXPR_ARRAY) |
1287 | { | |
39908fd9 | 1288 | /* Build a new charlen to prevent simplification from |
1289 | deleting the length before it is resolved. */ | |
1290 | init->ts.cl = gfc_get_charlen (); | |
1291 | init->ts.cl->next = gfc_current_ns->cl_list; | |
1292 | gfc_current_ns->cl_list = sym->ts.cl; | |
a270dc8e | 1293 | init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length); |
39908fd9 | 1294 | |
a270dc8e | 1295 | for (p = init->value.constructor; p; p = p->next) |
d1a39099 | 1296 | gfc_set_constant_character_len (len, p->expr, -1); |
a270dc8e | 1297 | } |
1298 | } | |
1299 | } | |
1300 | ||
c5d33754 | 1301 | /* Need to check if the expression we initialized this |
1302 | to was one of the iso_c_binding named constants. If so, | |
1303 | and we're a parameter (constant), let it be iso_c. | |
1304 | For example: | |
1305 | integer(c_int), parameter :: my_int = c_int | |
1306 | integer(my_int) :: my_int_2 | |
1307 | If we mark my_int as iso_c (since we can see it's value | |
1308 | is equal to one of the named constants), then my_int_2 | |
1309 | will be considered C interoperable. */ | |
1310 | if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) | |
1311 | { | |
1312 | sym->ts.is_iso_c |= init->ts.is_iso_c; | |
1313 | sym->ts.is_c_interop |= init->ts.is_c_interop; | |
1314 | /* attr bits needed for module files. */ | |
1315 | sym->attr.is_iso_c |= init->ts.is_iso_c; | |
1316 | sym->attr.is_c_interop |= init->ts.is_c_interop; | |
1317 | if (init->ts.is_iso_c) | |
1318 | sym->ts.f90_type = init->ts.f90_type; | |
1319 | } | |
1320 | ||
4ee9c684 | 1321 | /* Add initializer. Make sure we keep the ranks sane. */ |
1322 | if (sym->attr.dimension && init->rank == 0) | |
7baa3fb4 | 1323 | { |
1324 | mpz_t size; | |
1325 | gfc_expr *array; | |
1326 | gfc_constructor *c; | |
1327 | int n; | |
1328 | if (sym->attr.flavor == FL_PARAMETER | |
1329 | && init->expr_type == EXPR_CONSTANT | |
1330 | && spec_size (sym->as, &size) == SUCCESS | |
1331 | && mpz_cmp_si (size, 0) > 0) | |
1332 | { | |
1333 | array = gfc_start_constructor (init->ts.type, init->ts.kind, | |
1334 | &init->where); | |
1335 | ||
1336 | array->value.constructor = c = NULL; | |
1337 | for (n = 0; n < (int)mpz_get_si (size); n++) | |
1338 | { | |
1339 | if (array->value.constructor == NULL) | |
1340 | { | |
1341 | array->value.constructor = c = gfc_get_constructor (); | |
1342 | c->expr = init; | |
1343 | } | |
1344 | else | |
1345 | { | |
1346 | c->next = gfc_get_constructor (); | |
1347 | c = c->next; | |
1348 | c->expr = gfc_copy_expr (init); | |
1349 | } | |
1350 | } | |
1351 | ||
1352 | array->shape = gfc_get_shape (sym->as->rank); | |
1353 | for (n = 0; n < sym->as->rank; n++) | |
1354 | spec_dimen_size (sym->as, n, &array->shape[n]); | |
1355 | ||
1356 | init = array; | |
1357 | mpz_clear (size); | |
1358 | } | |
1359 | init->rank = sym->as->rank; | |
1360 | } | |
4ee9c684 | 1361 | |
1362 | sym->value = init; | |
3cd3c667 | 1363 | if (sym->attr.save == SAVE_NONE) |
1364 | sym->attr.save = SAVE_IMPLICIT; | |
4ee9c684 | 1365 | *initp = NULL; |
1366 | } | |
1367 | ||
1368 | return SUCCESS; | |
1369 | } | |
1370 | ||
1371 | ||
1372 | /* Function called by variable_decl() that adds a name to a structure | |
1373 | being built. */ | |
1374 | ||
f6bb8f4b | 1375 | static gfc_try |
1a9745d2 | 1376 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
1377 | gfc_array_spec **as) | |
4ee9c684 | 1378 | { |
1379 | gfc_component *c; | |
1380 | ||
1381 | /* If the current symbol is of the same derived type that we're | |
1382 | constructing, it must have the pointer attribute. */ | |
1383 | if (current_ts.type == BT_DERIVED | |
1384 | && current_ts.derived == gfc_current_block () | |
1385 | && current_attr.pointer == 0) | |
1386 | { | |
1387 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1388 | return FAILURE; | |
1389 | } | |
1390 | ||
1a9745d2 | 1391 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
4ee9c684 | 1392 | { |
1393 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1394 | { | |
1395 | gfc_error ("Array component of structure at %C must have explicit " | |
1396 | "or deferred shape"); | |
1397 | return FAILURE; | |
1398 | } | |
1399 | } | |
1400 | ||
1401 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1402 | return FAILURE; | |
1403 | ||
1404 | c->ts = current_ts; | |
1405 | c->ts.cl = cl; | |
3be2b8d5 | 1406 | c->attr = current_attr; |
4ee9c684 | 1407 | |
1408 | c->initializer = *init; | |
1409 | *init = NULL; | |
1410 | ||
1411 | c->as = *as; | |
1412 | if (c->as != NULL) | |
3be2b8d5 | 1413 | c->attr.dimension = 1; |
4ee9c684 | 1414 | *as = NULL; |
1415 | ||
a2f51d5f | 1416 | /* Should this ever get more complicated, combine with similar section |
1417 | in add_init_expr_to_sym into a separate function. */ | |
3be2b8d5 | 1418 | if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.cl |
d1a39099 | 1419 | && c->ts.cl->length && c->ts.cl->length->expr_type == EXPR_CONSTANT) |
a2f51d5f | 1420 | { |
d1a39099 | 1421 | int len; |
1422 | ||
1423 | gcc_assert (c->ts.cl && c->ts.cl->length); | |
1424 | gcc_assert (c->ts.cl->length->expr_type == EXPR_CONSTANT); | |
1425 | gcc_assert (c->ts.cl->length->ts.type == BT_INTEGER); | |
1426 | ||
1427 | len = mpz_get_si (c->ts.cl->length->value.integer); | |
a2f51d5f | 1428 | |
1429 | if (c->initializer->expr_type == EXPR_CONSTANT) | |
d1a39099 | 1430 | gfc_set_constant_character_len (len, c->initializer, -1); |
a2f51d5f | 1431 | else if (mpz_cmp (c->ts.cl->length->value.integer, |
1432 | c->initializer->ts.cl->length->value.integer)) | |
1433 | { | |
d1a39099 | 1434 | bool has_ts; |
a2f51d5f | 1435 | gfc_constructor *ctor = c->initializer->value.constructor; |
d1a39099 | 1436 | |
1437 | bool first = true; | |
1438 | int first_len; | |
1439 | ||
1440 | has_ts = (c->initializer->ts.cl | |
1441 | && c->initializer->ts.cl->length_from_typespec); | |
1442 | ||
1443 | for (; ctor; ctor = ctor->next) | |
1444 | { | |
1445 | /* Remember the length of the first element for checking that | |
1446 | all elements *in the constructor* have the same length. This | |
1447 | need not be the length of the LHS! */ | |
1448 | if (first) | |
1449 | { | |
1450 | gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT); | |
1451 | gcc_assert (ctor->expr->ts.type == BT_CHARACTER); | |
1452 | first_len = ctor->expr->value.character.length; | |
1453 | first = false; | |
1454 | } | |
1455 | ||
1456 | if (ctor->expr->expr_type == EXPR_CONSTANT) | |
1457 | gfc_set_constant_character_len (len, ctor->expr, | |
1458 | has_ts ? -1 : first_len); | |
1459 | } | |
a2f51d5f | 1460 | } |
1461 | } | |
1462 | ||
4ee9c684 | 1463 | /* Check array components. */ |
3be2b8d5 | 1464 | if (!c->attr.dimension) |
2294b616 | 1465 | { |
3be2b8d5 | 1466 | if (c->attr.allocatable) |
2294b616 | 1467 | { |
1468 | gfc_error ("Allocatable component at %C must be an array"); | |
1469 | return FAILURE; | |
1470 | } | |
1471 | else | |
1472 | return SUCCESS; | |
1473 | } | |
4ee9c684 | 1474 | |
3be2b8d5 | 1475 | if (c->attr.pointer) |
4ee9c684 | 1476 | { |
1477 | if (c->as->type != AS_DEFERRED) | |
1478 | { | |
2294b616 | 1479 | gfc_error ("Pointer array component of structure at %C must have a " |
1480 | "deferred shape"); | |
1481 | return FAILURE; | |
1482 | } | |
1483 | } | |
3be2b8d5 | 1484 | else if (c->attr.allocatable) |
2294b616 | 1485 | { |
1486 | if (c->as->type != AS_DEFERRED) | |
1487 | { | |
1488 | gfc_error ("Allocatable component of structure at %C must have a " | |
1489 | "deferred shape"); | |
4ee9c684 | 1490 | return FAILURE; |
1491 | } | |
1492 | } | |
1493 | else | |
1494 | { | |
1495 | if (c->as->type != AS_EXPLICIT) | |
1496 | { | |
1a9745d2 | 1497 | gfc_error ("Array component of structure at %C must have an " |
1498 | "explicit shape"); | |
4ee9c684 | 1499 | return FAILURE; |
1500 | } | |
1501 | } | |
1502 | ||
1503 | return SUCCESS; | |
1504 | } | |
1505 | ||
1506 | ||
1507 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1508 | ||
1509 | match | |
1a9745d2 | 1510 | gfc_match_null (gfc_expr **result) |
4ee9c684 | 1511 | { |
1512 | gfc_symbol *sym; | |
1513 | gfc_expr *e; | |
1514 | match m; | |
1515 | ||
1516 | m = gfc_match (" null ( )"); | |
1517 | if (m != MATCH_YES) | |
1518 | return m; | |
1519 | ||
1520 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1521 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1522 | { | |
1523 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1524 | return MATCH_ERROR; | |
1525 | } | |
1526 | ||
1527 | gfc_intrinsic_symbol (sym); | |
1528 | ||
1529 | if (sym->attr.proc != PROC_INTRINSIC | |
950683ed | 1530 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1531 | sym->name, NULL) == FAILURE | |
1532 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
4ee9c684 | 1533 | return MATCH_ERROR; |
1534 | ||
1535 | e = gfc_get_expr (); | |
cbb9e6aa | 1536 | e->where = gfc_current_locus; |
4ee9c684 | 1537 | e->expr_type = EXPR_NULL; |
1538 | e->ts.type = BT_UNKNOWN; | |
1539 | ||
1540 | *result = e; | |
1541 | ||
1542 | return MATCH_YES; | |
1543 | } | |
1544 | ||
1545 | ||
4ee9c684 | 1546 | /* Match a variable name with an optional initializer. When this |
1547 | subroutine is called, a variable is expected to be parsed next. | |
1548 | Depending on what is happening at the moment, updates either the | |
1549 | symbol table or the current interface. */ | |
1550 | ||
1551 | static match | |
3923b69f | 1552 | variable_decl (int elem) |
4ee9c684 | 1553 | { |
1554 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1555 | gfc_expr *initializer, *char_len; | |
1556 | gfc_array_spec *as; | |
b549d2a5 | 1557 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
4ee9c684 | 1558 | gfc_charlen *cl; |
1559 | locus var_locus; | |
1560 | match m; | |
f6bb8f4b | 1561 | gfc_try t; |
b549d2a5 | 1562 | gfc_symbol *sym; |
3b6a4b41 | 1563 | locus old_locus; |
4ee9c684 | 1564 | |
1565 | initializer = NULL; | |
1566 | as = NULL; | |
b549d2a5 | 1567 | cp_as = NULL; |
3b6a4b41 | 1568 | old_locus = gfc_current_locus; |
4ee9c684 | 1569 | |
1570 | /* When we get here, we've just matched a list of attributes and | |
1571 | maybe a type and a double colon. The next thing we expect to see | |
1572 | is the name of the symbol. */ | |
1573 | m = gfc_match_name (name); | |
1574 | if (m != MATCH_YES) | |
1575 | goto cleanup; | |
1576 | ||
cbb9e6aa | 1577 | var_locus = gfc_current_locus; |
4ee9c684 | 1578 | |
1579 | /* Now we could see the optional array spec. or character length. */ | |
1580 | m = gfc_match_array_spec (&as); | |
b549d2a5 | 1581 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1582 | cp_as = gfc_copy_array_spec (as); | |
1583 | else if (m == MATCH_ERROR) | |
4ee9c684 | 1584 | goto cleanup; |
3b6a4b41 | 1585 | |
4ee9c684 | 1586 | if (m == MATCH_NO) |
1587 | as = gfc_copy_array_spec (current_as); | |
1588 | ||
1589 | char_len = NULL; | |
1590 | cl = NULL; | |
1591 | ||
1592 | if (current_ts.type == BT_CHARACTER) | |
1593 | { | |
1594 | switch (match_char_length (&char_len)) | |
1595 | { | |
1596 | case MATCH_YES: | |
1597 | cl = gfc_get_charlen (); | |
1598 | cl->next = gfc_current_ns->cl_list; | |
1599 | gfc_current_ns->cl_list = cl; | |
1600 | ||
1601 | cl->length = char_len; | |
1602 | break; | |
1603 | ||
3923b69f | 1604 | /* Non-constant lengths need to be copied after the first |
04b61f60 | 1605 | element. Also copy assumed lengths. */ |
4ee9c684 | 1606 | case MATCH_NO: |
04b61f60 | 1607 | if (elem > 1 |
1608 | && (current_ts.cl->length == NULL | |
1609 | || current_ts.cl->length->expr_type != EXPR_CONSTANT)) | |
3923b69f | 1610 | { |
1611 | cl = gfc_get_charlen (); | |
1612 | cl->next = gfc_current_ns->cl_list; | |
1613 | gfc_current_ns->cl_list = cl; | |
1614 | cl->length = gfc_copy_expr (current_ts.cl->length); | |
1615 | } | |
1616 | else | |
1617 | cl = current_ts.cl; | |
1618 | ||
4ee9c684 | 1619 | break; |
1620 | ||
1621 | case MATCH_ERROR: | |
1622 | goto cleanup; | |
1623 | } | |
1624 | } | |
1625 | ||
b549d2a5 | 1626 | /* If this symbol has already shown up in a Cray Pointer declaration, |
f6d0e37a | 1627 | then we want to set the type & bail out. */ |
b549d2a5 | 1628 | if (gfc_option.flag_cray_pointer) |
1629 | { | |
1630 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1631 | if (sym != NULL && sym->attr.cray_pointee) | |
1632 | { | |
1633 | sym->ts.type = current_ts.type; | |
1634 | sym->ts.kind = current_ts.kind; | |
1635 | sym->ts.cl = cl; | |
1636 | sym->ts.derived = current_ts.derived; | |
c5d33754 | 1637 | sym->ts.is_c_interop = current_ts.is_c_interop; |
1638 | sym->ts.is_iso_c = current_ts.is_iso_c; | |
b549d2a5 | 1639 | m = MATCH_YES; |
1640 | ||
1641 | /* Check to see if we have an array specification. */ | |
1642 | if (cp_as != NULL) | |
1643 | { | |
1644 | if (sym->as != NULL) | |
1645 | { | |
7698a624 | 1646 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 1647 | gfc_free_array_spec (cp_as); |
1648 | m = MATCH_ERROR; | |
1649 | goto cleanup; | |
1650 | } | |
1651 | else | |
1652 | { | |
1653 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1654 | gfc_internal_error ("Couldn't set pointee array spec."); | |
e14bee04 | 1655 | |
b549d2a5 | 1656 | /* Fix the array spec. */ |
e14bee04 | 1657 | m = gfc_mod_pointee_as (sym->as); |
b549d2a5 | 1658 | if (m == MATCH_ERROR) |
1659 | goto cleanup; | |
1660 | } | |
e14bee04 | 1661 | } |
b549d2a5 | 1662 | goto cleanup; |
1663 | } | |
1664 | else | |
1665 | { | |
1666 | gfc_free_array_spec (cp_as); | |
1667 | } | |
1668 | } | |
e14bee04 | 1669 | |
1670 | ||
4ee9c684 | 1671 | /* OK, we've successfully matched the declaration. Now put the |
1672 | symbol in the current namespace, because it might be used in the | |
fe06c0d5 | 1673 | optional initialization expression for this symbol, e.g. this is |
4ee9c684 | 1674 | perfectly legal: |
1675 | ||
1676 | integer, parameter :: i = huge(i) | |
1677 | ||
1678 | This is only true for parameters or variables of a basic type. | |
1679 | For components of derived types, it is not true, so we don't | |
1680 | create a symbol for those yet. If we fail to create the symbol, | |
1681 | bail out. */ | |
1682 | if (gfc_current_state () != COMP_DERIVED | |
1683 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1684 | { | |
b8a51d79 | 1685 | m = MATCH_ERROR; |
1686 | goto cleanup; | |
1687 | } | |
1688 | ||
60fbbf9e | 1689 | /* An interface body specifies all of the procedure's |
1690 | characteristics and these shall be consistent with those | |
1691 | specified in the procedure definition, except that the interface | |
1692 | may specify a procedure that is not pure if the procedure is | |
1693 | defined to be pure(12.3.2). */ | |
b8a51d79 | 1694 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1695 | && gfc_current_ns->proc_name |
1696 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
c723595c | 1697 | && current_ts.derived->ns != gfc_current_ns) |
1698 | { | |
1699 | gfc_symtree *st; | |
1700 | st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.derived->name); | |
1701 | if (!(current_ts.derived->attr.imported | |
1702 | && st != NULL | |
1703 | && st->n.sym == current_ts.derived) | |
1704 | && !gfc_current_ns->has_import_set) | |
1705 | { | |
1706 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1707 | "interface", name); | |
1708 | m = MATCH_ERROR; | |
1709 | goto cleanup; | |
1710 | } | |
4ee9c684 | 1711 | } |
1712 | ||
1713 | /* In functions that have a RESULT variable defined, the function | |
1714 | name always refers to function calls. Therefore, the name is | |
1715 | not allowed to appear in specification statements. */ | |
1716 | if (gfc_current_state () == COMP_FUNCTION | |
1717 | && gfc_current_block () != NULL | |
1718 | && gfc_current_block ()->result != NULL | |
1719 | && gfc_current_block ()->result != gfc_current_block () | |
1720 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1721 | { | |
1722 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1723 | m = MATCH_ERROR; | |
1724 | goto cleanup; | |
1725 | } | |
1726 | ||
b4f45d02 | 1727 | /* We allow old-style initializations of the form |
1728 | integer i /2/, j(4) /3*3, 1/ | |
1729 | (if no colon has been seen). These are different from data | |
1730 | statements in that initializers are only allowed to apply to the | |
1731 | variable immediately preceding, i.e. | |
1732 | integer i, j /1, 2/ | |
1733 | is not allowed. Therefore we have to do some work manually, that | |
cca3db55 | 1734 | could otherwise be left to the matchers for DATA statements. */ |
b4f45d02 | 1735 | |
1736 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1737 | { | |
1738 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1739 | "initialization at %C") == FAILURE) | |
1740 | return MATCH_ERROR; | |
e14bee04 | 1741 | |
b4f45d02 | 1742 | return match_old_style_init (name); |
1743 | } | |
1744 | ||
4ee9c684 | 1745 | /* The double colon must be present in order to have initializers. |
1746 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1747 | if (colon_seen) | |
1748 | { | |
1749 | if (gfc_match (" =>") == MATCH_YES) | |
1750 | { | |
4ee9c684 | 1751 | if (!current_attr.pointer) |
1752 | { | |
1753 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1754 | m = MATCH_ERROR; | |
1755 | goto cleanup; | |
1756 | } | |
1757 | ||
1758 | m = gfc_match_null (&initializer); | |
1759 | if (m == MATCH_NO) | |
1760 | { | |
e4789c62 | 1761 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
4ee9c684 | 1762 | m = MATCH_ERROR; |
1763 | } | |
1764 | ||
1765 | if (gfc_pure (NULL)) | |
1766 | { | |
1a9745d2 | 1767 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1768 | "a PURE procedure"); | |
4ee9c684 | 1769 | m = MATCH_ERROR; |
1770 | } | |
1771 | ||
1772 | if (m != MATCH_YES) | |
1773 | goto cleanup; | |
1774 | ||
4ee9c684 | 1775 | } |
1776 | else if (gfc_match_char ('=') == MATCH_YES) | |
1777 | { | |
1778 | if (current_attr.pointer) | |
1779 | { | |
1a9745d2 | 1780 | gfc_error ("Pointer initialization at %C requires '=>', " |
1781 | "not '='"); | |
4ee9c684 | 1782 | m = MATCH_ERROR; |
1783 | goto cleanup; | |
1784 | } | |
1785 | ||
1786 | m = gfc_match_init_expr (&initializer); | |
1787 | if (m == MATCH_NO) | |
1788 | { | |
1789 | gfc_error ("Expected an initialization expression at %C"); | |
1790 | m = MATCH_ERROR; | |
1791 | } | |
1792 | ||
1793 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1794 | { | |
1a9745d2 | 1795 | gfc_error ("Initialization of variable at %C is not allowed in " |
1796 | "a PURE procedure"); | |
4ee9c684 | 1797 | m = MATCH_ERROR; |
1798 | } | |
1799 | ||
1800 | if (m != MATCH_YES) | |
1801 | goto cleanup; | |
1802 | } | |
8ffad0f9 | 1803 | } |
1804 | ||
2294b616 | 1805 | if (initializer != NULL && current_attr.allocatable |
1806 | && gfc_current_state () == COMP_DERIVED) | |
1807 | { | |
1a9745d2 | 1808 | gfc_error ("Initialization of allocatable component at %C is not " |
1809 | "allowed"); | |
2294b616 | 1810 | m = MATCH_ERROR; |
1811 | goto cleanup; | |
1812 | } | |
1813 | ||
d9b3f26b | 1814 | /* Add the initializer. Note that it is fine if initializer is |
4ee9c684 | 1815 | NULL here, because we sometimes also need to check if a |
1816 | declaration *must* have an initialization expression. */ | |
1817 | if (gfc_current_state () != COMP_DERIVED) | |
1818 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1819 | else | |
d9b3f26b | 1820 | { |
2294b616 | 1821 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1822 | && !current_attr.pointer && !initializer) |
d9b3f26b | 1823 | initializer = gfc_default_initializer (¤t_ts); |
1824 | t = build_struct (name, cl, &initializer, &as); | |
1825 | } | |
4ee9c684 | 1826 | |
1827 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1828 | ||
1829 | cleanup: | |
1830 | /* Free stuff up and return. */ | |
1831 | gfc_free_expr (initializer); | |
1832 | gfc_free_array_spec (as); | |
1833 | ||
1834 | return m; | |
1835 | } | |
1836 | ||
1837 | ||
d10f89ee | 1838 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
1839 | This assumes that the byte size is equal to the kind number for | |
1840 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
4ee9c684 | 1841 | |
1842 | match | |
1a9745d2 | 1843 | gfc_match_old_kind_spec (gfc_typespec *ts) |
4ee9c684 | 1844 | { |
1845 | match m; | |
3bd3b616 | 1846 | int original_kind; |
4ee9c684 | 1847 | |
1848 | if (gfc_match_char ('*') != MATCH_YES) | |
1849 | return MATCH_NO; | |
1850 | ||
3bd3b616 | 1851 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
4ee9c684 | 1852 | if (m != MATCH_YES) |
1853 | return MATCH_ERROR; | |
1854 | ||
b118a35b | 1855 | original_kind = ts->kind; |
1856 | ||
4ee9c684 | 1857 | /* Massage the kind numbers for complex types. */ |
b118a35b | 1858 | if (ts->type == BT_COMPLEX) |
1859 | { | |
1860 | if (ts->kind % 2) | |
1a9745d2 | 1861 | { |
1862 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1863 | gfc_basic_typename (ts->type), original_kind); | |
1864 | return MATCH_ERROR; | |
1865 | } | |
b118a35b | 1866 | ts->kind /= 2; |
1867 | } | |
4ee9c684 | 1868 | |
f2d4ef3b | 1869 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1870 | { |
b118a35b | 1871 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
1a9745d2 | 1872 | gfc_basic_typename (ts->type), original_kind); |
4ee9c684 | 1873 | return MATCH_ERROR; |
1874 | } | |
1875 | ||
be7f01a1 | 1876 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
1877 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1878 | return MATCH_ERROR; | |
1879 | ||
4ee9c684 | 1880 | return MATCH_YES; |
1881 | } | |
1882 | ||
1883 | ||
1884 | /* Match a kind specification. Since kinds are generally optional, we | |
1885 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1886 | string is found, then we know we have an error. */ | |
1887 | ||
1888 | match | |
67a51c8e | 1889 | gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only) |
4ee9c684 | 1890 | { |
67a51c8e | 1891 | locus where, loc; |
4ee9c684 | 1892 | gfc_expr *e; |
1893 | match m, n; | |
c632ff3d | 1894 | char c; |
4ee9c684 | 1895 | const char *msg; |
1896 | ||
1897 | m = MATCH_NO; | |
67a51c8e | 1898 | n = MATCH_YES; |
4ee9c684 | 1899 | e = NULL; |
1900 | ||
67a51c8e | 1901 | where = loc = gfc_current_locus; |
1902 | ||
1903 | if (kind_expr_only) | |
1904 | goto kind_expr; | |
4ee9c684 | 1905 | |
1906 | if (gfc_match_char ('(') == MATCH_NO) | |
1907 | return MATCH_NO; | |
1908 | ||
1909 | /* Also gobbles optional text. */ | |
1910 | if (gfc_match (" kind = ") == MATCH_YES) | |
1911 | m = MATCH_ERROR; | |
1912 | ||
67a51c8e | 1913 | loc = gfc_current_locus; |
1914 | ||
1915 | kind_expr: | |
4ee9c684 | 1916 | n = gfc_match_init_expr (&e); |
67a51c8e | 1917 | |
4ee9c684 | 1918 | if (n != MATCH_YES) |
67a51c8e | 1919 | { |
077932f9 | 1920 | if (gfc_matching_function) |
67a51c8e | 1921 | { |
077932f9 | 1922 | /* The function kind expression might include use associated or |
1923 | imported parameters and try again after the specification | |
1924 | expressions..... */ | |
67a51c8e | 1925 | if (gfc_match_char (')') != MATCH_YES) |
1926 | { | |
1927 | gfc_error ("Missing right parenthesis at %C"); | |
1928 | m = MATCH_ERROR; | |
1929 | goto no_match; | |
1930 | } | |
1931 | ||
1932 | gfc_free_expr (e); | |
67a51c8e | 1933 | gfc_undo_symbols (); |
1934 | return MATCH_YES; | |
1935 | } | |
1936 | else | |
1937 | { | |
1938 | /* ....or else, the match is real. */ | |
1939 | if (n == MATCH_NO) | |
1940 | gfc_error ("Expected initialization expression at %C"); | |
1941 | if (n != MATCH_YES) | |
1942 | return MATCH_ERROR; | |
1943 | } | |
1944 | } | |
4ee9c684 | 1945 | |
1946 | if (e->rank != 0) | |
1947 | { | |
1948 | gfc_error ("Expected scalar initialization expression at %C"); | |
1949 | m = MATCH_ERROR; | |
1950 | goto no_match; | |
1951 | } | |
1952 | ||
1953 | msg = gfc_extract_int (e, &ts->kind); | |
077932f9 | 1954 | |
4ee9c684 | 1955 | if (msg != NULL) |
1956 | { | |
1957 | gfc_error (msg); | |
1958 | m = MATCH_ERROR; | |
1959 | goto no_match; | |
1960 | } | |
1961 | ||
c5d33754 | 1962 | /* Before throwing away the expression, let's see if we had a |
1963 | C interoperable kind (and store the fact). */ | |
1964 | if (e->ts.is_c_interop == 1) | |
1965 | { | |
1966 | /* Mark this as c interoperable if being declared with one | |
1967 | of the named constants from iso_c_binding. */ | |
1968 | ts->is_c_interop = e->ts.is_iso_c; | |
1969 | ts->f90_type = e->ts.f90_type; | |
1970 | } | |
1971 | ||
4ee9c684 | 1972 | gfc_free_expr (e); |
1973 | e = NULL; | |
1974 | ||
c5d33754 | 1975 | /* Ignore errors to this point, if we've gotten here. This means |
1976 | we ignore the m=MATCH_ERROR from above. */ | |
f2d4ef3b | 1977 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1978 | { |
1979 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
1980 | gfc_basic_typename (ts->type)); | |
c632ff3d | 1981 | gfc_current_locus = where; |
1982 | return MATCH_ERROR; | |
4ee9c684 | 1983 | } |
c632ff3d | 1984 | |
209d3778 | 1985 | /* Warn if, e.g., c_int is used for a REAL variable, but not |
1986 | if, e.g., c_double is used for COMPLEX as the standard | |
1987 | explicitly says that the kind type parameter for complex and real | |
1988 | variable is the same, i.e. c_float == c_float_complex. */ | |
1989 | if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type | |
1990 | && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX) | |
1991 | || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL))) | |
1992 | gfc_error_now ("C kind type parameter is for type %s but type at %L " | |
1993 | "is %s", gfc_basic_typename (ts->f90_type), &where, | |
1994 | gfc_basic_typename (ts->type)); | |
1995 | ||
c632ff3d | 1996 | gfc_gobble_whitespace (); |
e0be6f02 | 1997 | if ((c = gfc_next_ascii_char ()) != ')' |
1998 | && (ts->type != BT_CHARACTER || c != ',')) | |
4ee9c684 | 1999 | { |
c632ff3d | 2000 | if (ts->type == BT_CHARACTER) |
2001 | gfc_error ("Missing right parenthesis or comma at %C"); | |
2002 | else | |
2003 | gfc_error ("Missing right parenthesis at %C"); | |
67a51c8e | 2004 | m = MATCH_ERROR; |
4ee9c684 | 2005 | } |
c5d33754 | 2006 | else |
2007 | /* All tests passed. */ | |
2008 | m = MATCH_YES; | |
4ee9c684 | 2009 | |
c5d33754 | 2010 | if(m == MATCH_ERROR) |
2011 | gfc_current_locus = where; | |
2012 | ||
2013 | /* Return what we know from the test(s). */ | |
2014 | return m; | |
4ee9c684 | 2015 | |
2016 | no_match: | |
2017 | gfc_free_expr (e); | |
cbb9e6aa | 2018 | gfc_current_locus = where; |
4ee9c684 | 2019 | return m; |
2020 | } | |
2021 | ||
2022 | ||
33399208 | 2023 | static match |
2024 | match_char_kind (int * kind, int * is_iso_c) | |
2025 | { | |
2026 | locus where; | |
2027 | gfc_expr *e; | |
2028 | match m, n; | |
2029 | const char *msg; | |
2030 | ||
2031 | m = MATCH_NO; | |
2032 | e = NULL; | |
2033 | where = gfc_current_locus; | |
2034 | ||
2035 | n = gfc_match_init_expr (&e); | |
c632ff3d | 2036 | |
077932f9 | 2037 | if (n != MATCH_YES && gfc_matching_function) |
c632ff3d | 2038 | { |
077932f9 | 2039 | /* The expression might include use-associated or imported |
2040 | parameters and try again after the specification | |
2041 | expressions. */ | |
c632ff3d | 2042 | gfc_free_expr (e); |
c632ff3d | 2043 | gfc_undo_symbols (); |
2044 | return MATCH_YES; | |
2045 | } | |
2046 | ||
33399208 | 2047 | if (n == MATCH_NO) |
2048 | gfc_error ("Expected initialization expression at %C"); | |
2049 | if (n != MATCH_YES) | |
2050 | return MATCH_ERROR; | |
2051 | ||
2052 | if (e->rank != 0) | |
2053 | { | |
2054 | gfc_error ("Expected scalar initialization expression at %C"); | |
2055 | m = MATCH_ERROR; | |
2056 | goto no_match; | |
2057 | } | |
2058 | ||
2059 | msg = gfc_extract_int (e, kind); | |
2060 | *is_iso_c = e->ts.is_iso_c; | |
2061 | if (msg != NULL) | |
2062 | { | |
2063 | gfc_error (msg); | |
2064 | m = MATCH_ERROR; | |
2065 | goto no_match; | |
2066 | } | |
2067 | ||
2068 | gfc_free_expr (e); | |
2069 | ||
2070 | /* Ignore errors to this point, if we've gotten here. This means | |
2071 | we ignore the m=MATCH_ERROR from above. */ | |
2072 | if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0) | |
2073 | { | |
2074 | gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind); | |
2075 | m = MATCH_ERROR; | |
2076 | } | |
2077 | else | |
2078 | /* All tests passed. */ | |
2079 | m = MATCH_YES; | |
2080 | ||
2081 | if (m == MATCH_ERROR) | |
2082 | gfc_current_locus = where; | |
2083 | ||
2084 | /* Return what we know from the test(s). */ | |
2085 | return m; | |
2086 | ||
2087 | no_match: | |
2088 | gfc_free_expr (e); | |
2089 | gfc_current_locus = where; | |
2090 | return m; | |
2091 | } | |
2092 | ||
4ee9c684 | 2093 | /* Match the various kind/length specifications in a CHARACTER |
2094 | declaration. We don't return MATCH_NO. */ | |
2095 | ||
2096 | static match | |
1a9745d2 | 2097 | match_char_spec (gfc_typespec *ts) |
4ee9c684 | 2098 | { |
33399208 | 2099 | int kind, seen_length, is_iso_c; |
4ee9c684 | 2100 | gfc_charlen *cl; |
2101 | gfc_expr *len; | |
2102 | match m; | |
33399208 | 2103 | |
4ee9c684 | 2104 | len = NULL; |
2105 | seen_length = 0; | |
33399208 | 2106 | kind = 0; |
2107 | is_iso_c = 0; | |
4ee9c684 | 2108 | |
2109 | /* Try the old-style specification first. */ | |
2110 | old_char_selector = 0; | |
2111 | ||
2112 | m = match_char_length (&len); | |
2113 | if (m != MATCH_NO) | |
2114 | { | |
2115 | if (m == MATCH_YES) | |
2116 | old_char_selector = 1; | |
2117 | seen_length = 1; | |
2118 | goto done; | |
2119 | } | |
2120 | ||
2121 | m = gfc_match_char ('('); | |
2122 | if (m != MATCH_YES) | |
2123 | { | |
c5d33754 | 2124 | m = MATCH_YES; /* Character without length is a single char. */ |
4ee9c684 | 2125 | goto done; |
2126 | } | |
2127 | ||
c5d33754 | 2128 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ |
4ee9c684 | 2129 | if (gfc_match (" kind =") == MATCH_YES) |
2130 | { | |
33399208 | 2131 | m = match_char_kind (&kind, &is_iso_c); |
c5d33754 | 2132 | |
4ee9c684 | 2133 | if (m == MATCH_ERROR) |
2134 | goto done; | |
2135 | if (m == MATCH_NO) | |
2136 | goto syntax; | |
2137 | ||
2138 | if (gfc_match (" , len =") == MATCH_NO) | |
2139 | goto rparen; | |
2140 | ||
2141 | m = char_len_param_value (&len); | |
2142 | if (m == MATCH_NO) | |
2143 | goto syntax; | |
2144 | if (m == MATCH_ERROR) | |
2145 | goto done; | |
2146 | seen_length = 1; | |
2147 | ||
2148 | goto rparen; | |
2149 | } | |
2150 | ||
f6d0e37a | 2151 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ |
4ee9c684 | 2152 | if (gfc_match (" len =") == MATCH_YES) |
2153 | { | |
2154 | m = char_len_param_value (&len); | |
2155 | if (m == MATCH_NO) | |
2156 | goto syntax; | |
2157 | if (m == MATCH_ERROR) | |
2158 | goto done; | |
2159 | seen_length = 1; | |
2160 | ||
2161 | if (gfc_match_char (')') == MATCH_YES) | |
2162 | goto done; | |
2163 | ||
2164 | if (gfc_match (" , kind =") != MATCH_YES) | |
2165 | goto syntax; | |
2166 | ||
33399208 | 2167 | if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR) |
2168 | goto done; | |
4ee9c684 | 2169 | |
2170 | goto rparen; | |
2171 | } | |
2172 | ||
f6d0e37a | 2173 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
4ee9c684 | 2174 | m = char_len_param_value (&len); |
2175 | if (m == MATCH_NO) | |
2176 | goto syntax; | |
2177 | if (m == MATCH_ERROR) | |
2178 | goto done; | |
2179 | seen_length = 1; | |
2180 | ||
2181 | m = gfc_match_char (')'); | |
2182 | if (m == MATCH_YES) | |
2183 | goto done; | |
2184 | ||
2185 | if (gfc_match_char (',') != MATCH_YES) | |
2186 | goto syntax; | |
2187 | ||
c5d33754 | 2188 | gfc_match (" kind ="); /* Gobble optional text. */ |
4ee9c684 | 2189 | |
33399208 | 2190 | m = match_char_kind (&kind, &is_iso_c); |
4ee9c684 | 2191 | if (m == MATCH_ERROR) |
2192 | goto done; | |
2193 | if (m == MATCH_NO) | |
2194 | goto syntax; | |
2195 | ||
2196 | rparen: | |
2197 | /* Require a right-paren at this point. */ | |
2198 | m = gfc_match_char (')'); | |
2199 | if (m == MATCH_YES) | |
2200 | goto done; | |
2201 | ||
2202 | syntax: | |
2203 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
2204 | m = MATCH_ERROR; | |
a3cbe8cc | 2205 | gfc_free_expr (len); |
2206 | return m; | |
4ee9c684 | 2207 | |
2208 | done: | |
8d39570e | 2209 | /* Deal with character functions after USE and IMPORT statements. */ |
2210 | if (gfc_matching_function) | |
077932f9 | 2211 | { |
8d39570e | 2212 | gfc_free_expr (len); |
077932f9 | 2213 | gfc_undo_symbols (); |
2214 | return MATCH_YES; | |
2215 | } | |
2216 | ||
4ee9c684 | 2217 | if (m != MATCH_YES) |
2218 | { | |
2219 | gfc_free_expr (len); | |
2220 | return m; | |
2221 | } | |
2222 | ||
2223 | /* Do some final massaging of the length values. */ | |
2224 | cl = gfc_get_charlen (); | |
2225 | cl->next = gfc_current_ns->cl_list; | |
2226 | gfc_current_ns->cl_list = cl; | |
2227 | ||
2228 | if (seen_length == 0) | |
2229 | cl->length = gfc_int_expr (1); | |
2230 | else | |
2fe2caa6 | 2231 | cl->length = len; |
4ee9c684 | 2232 | |
2233 | ts->cl = cl; | |
33399208 | 2234 | ts->kind = kind == 0 ? gfc_default_character_kind : kind; |
4ee9c684 | 2235 | |
c5d33754 | 2236 | /* We have to know if it was a c interoperable kind so we can |
2237 | do accurate type checking of bind(c) procs, etc. */ | |
33399208 | 2238 | if (kind != 0) |
2239 | /* Mark this as c interoperable if being declared with one | |
2240 | of the named constants from iso_c_binding. */ | |
2241 | ts->is_c_interop = is_iso_c; | |
c5d33754 | 2242 | else if (len != NULL) |
33399208 | 2243 | /* Here, we might have parsed something such as: character(c_char) |
2244 | In this case, the parsing code above grabs the c_char when | |
2245 | looking for the length (line 1690, roughly). it's the last | |
2246 | testcase for parsing the kind params of a character variable. | |
2247 | However, it's not actually the length. this seems like it | |
2248 | could be an error. | |
2249 | To see if the user used a C interop kind, test the expr | |
2250 | of the so called length, and see if it's C interoperable. */ | |
2251 | ts->is_c_interop = len->ts.is_iso_c; | |
c5d33754 | 2252 | |
4ee9c684 | 2253 | return MATCH_YES; |
2254 | } | |
2255 | ||
2256 | ||
2257 | /* Matches a type specification. If successful, sets the ts structure | |
2258 | to the matched specification. This is necessary for FUNCTION and | |
2259 | IMPLICIT statements. | |
2260 | ||
e14bee04 | 2261 | If implicit_flag is nonzero, then we don't check for the optional |
39351103 | 2262 | kind specification. Not doing so is needed for matching an IMPLICIT |
4ee9c684 | 2263 | statement correctly. */ |
2264 | ||
67a51c8e | 2265 | match |
2266 | gfc_match_type_spec (gfc_typespec *ts, int implicit_flag) | |
4ee9c684 | 2267 | { |
2268 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2269 | gfc_symbol *sym; | |
2270 | match m; | |
e0be6f02 | 2271 | char c; |
077932f9 | 2272 | bool seen_deferred_kind; |
4ee9c684 | 2273 | |
077932f9 | 2274 | /* A belt and braces check that the typespec is correctly being treated |
2275 | as a deferred characteristic association. */ | |
2276 | seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION) | |
8d39570e | 2277 | && (gfc_current_block ()->result->ts.kind == -1) |
2278 | && (ts->kind == -1); | |
4ee9c684 | 2279 | gfc_clear_ts (ts); |
077932f9 | 2280 | if (seen_deferred_kind) |
2281 | ts->kind = -1; | |
4ee9c684 | 2282 | |
c5d33754 | 2283 | /* Clear the current binding label, in case one is given. */ |
2284 | curr_binding_label[0] = '\0'; | |
2285 | ||
25b29122 | 2286 | if (gfc_match (" byte") == MATCH_YES) |
2287 | { | |
e14bee04 | 2288 | if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C") |
25b29122 | 2289 | == FAILURE) |
2290 | return MATCH_ERROR; | |
2291 | ||
2292 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
2293 | { | |
2294 | gfc_error ("BYTE type used at %C " | |
2295 | "is not available on the target machine"); | |
2296 | return MATCH_ERROR; | |
2297 | } | |
e14bee04 | 2298 | |
25b29122 | 2299 | ts->type = BT_INTEGER; |
2300 | ts->kind = 1; | |
2301 | return MATCH_YES; | |
2302 | } | |
2303 | ||
4ee9c684 | 2304 | if (gfc_match (" integer") == MATCH_YES) |
2305 | { | |
2306 | ts->type = BT_INTEGER; | |
b8a891cb | 2307 | ts->kind = gfc_default_integer_kind; |
4ee9c684 | 2308 | goto get_kind; |
2309 | } | |
2310 | ||
2311 | if (gfc_match (" character") == MATCH_YES) | |
2312 | { | |
2313 | ts->type = BT_CHARACTER; | |
39351103 | 2314 | if (implicit_flag == 0) |
2315 | return match_char_spec (ts); | |
2316 | else | |
2317 | return MATCH_YES; | |
4ee9c684 | 2318 | } |
2319 | ||
2320 | if (gfc_match (" real") == MATCH_YES) | |
2321 | { | |
2322 | ts->type = BT_REAL; | |
b8a891cb | 2323 | ts->kind = gfc_default_real_kind; |
4ee9c684 | 2324 | goto get_kind; |
2325 | } | |
2326 | ||
2327 | if (gfc_match (" double precision") == MATCH_YES) | |
2328 | { | |
2329 | ts->type = BT_REAL; | |
b8a891cb | 2330 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2331 | return MATCH_YES; |
2332 | } | |
2333 | ||
2334 | if (gfc_match (" complex") == MATCH_YES) | |
2335 | { | |
2336 | ts->type = BT_COMPLEX; | |
b8a891cb | 2337 | ts->kind = gfc_default_complex_kind; |
4ee9c684 | 2338 | goto get_kind; |
2339 | } | |
2340 | ||
2341 | if (gfc_match (" double complex") == MATCH_YES) | |
2342 | { | |
be7f01a1 | 2343 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
2344 | "conform to the Fortran 95 standard") == FAILURE) | |
2345 | return MATCH_ERROR; | |
2346 | ||
4ee9c684 | 2347 | ts->type = BT_COMPLEX; |
b8a891cb | 2348 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2349 | return MATCH_YES; |
2350 | } | |
2351 | ||
2352 | if (gfc_match (" logical") == MATCH_YES) | |
2353 | { | |
2354 | ts->type = BT_LOGICAL; | |
b8a891cb | 2355 | ts->kind = gfc_default_logical_kind; |
4ee9c684 | 2356 | goto get_kind; |
2357 | } | |
2358 | ||
2359 | m = gfc_match (" type ( %n )", name); | |
2360 | if (m != MATCH_YES) | |
2361 | return m; | |
2362 | ||
077932f9 | 2363 | ts->type = BT_DERIVED; |
2364 | ||
2365 | /* Defer association of the derived type until the end of the | |
2366 | specification block. However, if the derived type can be | |
2367 | found, add it to the typespec. */ | |
2368 | if (gfc_matching_function) | |
67a51c8e | 2369 | { |
077932f9 | 2370 | ts->derived = NULL; |
2371 | if (gfc_current_state () != COMP_INTERFACE | |
2372 | && !gfc_find_symbol (name, NULL, 1, &sym) && sym) | |
2373 | ts->derived = sym; | |
67a51c8e | 2374 | return MATCH_YES; |
2375 | } | |
2376 | ||
2377 | /* Search for the name but allow the components to be defined later. If | |
2378 | type = -1, this typespec has been seen in a function declaration but | |
077932f9 | 2379 | the type could not be accessed at that point. */ |
2380 | sym = NULL; | |
67a51c8e | 2381 | if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym)) |
4ee9c684 | 2382 | { |
2383 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2384 | return MATCH_ERROR; | |
2385 | } | |
67a51c8e | 2386 | else if (ts->kind == -1) |
2387 | { | |
077932f9 | 2388 | int iface = gfc_state_stack->previous->state != COMP_INTERFACE |
2389 | || gfc_current_ns->has_import_set; | |
2390 | if (gfc_find_symbol (name, NULL, iface, &sym)) | |
67a51c8e | 2391 | { |
2392 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2393 | return MATCH_ERROR; | |
2394 | } | |
2395 | ||
077932f9 | 2396 | ts->kind = 0; |
67a51c8e | 2397 | if (sym == NULL) |
2398 | return MATCH_NO; | |
2399 | } | |
4ee9c684 | 2400 | |
2401 | if (sym->attr.flavor != FL_DERIVED | |
950683ed | 2402 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 2403 | return MATCH_ERROR; |
2404 | ||
077932f9 | 2405 | gfc_set_sym_referenced (sym); |
4ee9c684 | 2406 | ts->derived = sym; |
2407 | ||
2408 | return MATCH_YES; | |
2409 | ||
2410 | get_kind: | |
2411 | /* For all types except double, derived and character, look for an | |
2412 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
39351103 | 2413 | if (implicit_flag == 1) |
4ee9c684 | 2414 | return MATCH_YES; |
2415 | ||
18f3698a | 2416 | if (gfc_current_form == FORM_FREE) |
2417 | { | |
e0be6f02 | 2418 | c = gfc_peek_ascii_char(); |
18f3698a | 2419 | if (!gfc_is_whitespace(c) && c != '*' && c != '(' |
1a9745d2 | 2420 | && c != ':' && c != ',') |
18f3698a | 2421 | return MATCH_NO; |
2422 | } | |
2423 | ||
67a51c8e | 2424 | m = gfc_match_kind_spec (ts, false); |
4ee9c684 | 2425 | if (m == MATCH_NO && ts->type != BT_CHARACTER) |
2426 | m = gfc_match_old_kind_spec (ts); | |
2427 | ||
077932f9 | 2428 | /* Defer association of the KIND expression of function results |
2429 | until after USE and IMPORT statements. */ | |
2430 | if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ()) | |
2431 | || gfc_matching_function) | |
2432 | return MATCH_YES; | |
2433 | ||
4ee9c684 | 2434 | if (m == MATCH_NO) |
2435 | m = MATCH_YES; /* No kind specifier found. */ | |
2436 | ||
2437 | return m; | |
2438 | } | |
2439 | ||
2440 | ||
39351103 | 2441 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
2442 | already matched in parse.c, or we would not end up here in the | |
2443 | first place. So the only thing we need to check, is if there is | |
2444 | trailing garbage. If not, the match is successful. */ | |
2445 | ||
2446 | match | |
2447 | gfc_match_implicit_none (void) | |
2448 | { | |
39351103 | 2449 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
2450 | } | |
2451 | ||
2452 | ||
2453 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
2454 | ||
2455 | static match | |
b70528c7 | 2456 | match_implicit_range (void) |
39351103 | 2457 | { |
e0be6f02 | 2458 | char c, c1, c2; |
2459 | int inner; | |
39351103 | 2460 | locus cur_loc; |
2461 | ||
2462 | cur_loc = gfc_current_locus; | |
2463 | ||
2464 | gfc_gobble_whitespace (); | |
e0be6f02 | 2465 | c = gfc_next_ascii_char (); |
39351103 | 2466 | if (c != '(') |
2467 | { | |
2468 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
2469 | goto bad; | |
2470 | } | |
2471 | ||
2472 | inner = 1; | |
2473 | while (inner) | |
2474 | { | |
2475 | gfc_gobble_whitespace (); | |
e0be6f02 | 2476 | c1 = gfc_next_ascii_char (); |
39351103 | 2477 | if (!ISALPHA (c1)) |
2478 | goto bad; | |
2479 | ||
2480 | gfc_gobble_whitespace (); | |
e0be6f02 | 2481 | c = gfc_next_ascii_char (); |
39351103 | 2482 | |
2483 | switch (c) | |
2484 | { | |
2485 | case ')': | |
f6d0e37a | 2486 | inner = 0; /* Fall through. */ |
39351103 | 2487 | |
2488 | case ',': | |
2489 | c2 = c1; | |
2490 | break; | |
2491 | ||
2492 | case '-': | |
2493 | gfc_gobble_whitespace (); | |
e0be6f02 | 2494 | c2 = gfc_next_ascii_char (); |
39351103 | 2495 | if (!ISALPHA (c2)) |
2496 | goto bad; | |
2497 | ||
2498 | gfc_gobble_whitespace (); | |
e0be6f02 | 2499 | c = gfc_next_ascii_char (); |
39351103 | 2500 | |
2501 | if ((c != ',') && (c != ')')) | |
2502 | goto bad; | |
2503 | if (c == ')') | |
2504 | inner = 0; | |
2505 | ||
2506 | break; | |
2507 | ||
2508 | default: | |
2509 | goto bad; | |
2510 | } | |
2511 | ||
2512 | if (c1 > c2) | |
2513 | { | |
2514 | gfc_error ("Letters must be in alphabetic order in " | |
2515 | "IMPLICIT statement at %C"); | |
2516 | goto bad; | |
2517 | } | |
2518 | ||
2519 | /* See if we can add the newly matched range to the pending | |
1a9745d2 | 2520 | implicits from this IMPLICIT statement. We do not check for |
2521 | conflicts with whatever earlier IMPLICIT statements may have | |
2522 | set. This is done when we've successfully finished matching | |
2523 | the current one. */ | |
b70528c7 | 2524 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
39351103 | 2525 | goto bad; |
2526 | } | |
2527 | ||
2528 | return MATCH_YES; | |
2529 | ||
2530 | bad: | |
2531 | gfc_syntax_error (ST_IMPLICIT); | |
2532 | ||
2533 | gfc_current_locus = cur_loc; | |
2534 | return MATCH_ERROR; | |
2535 | } | |
2536 | ||
2537 | ||
2538 | /* Match an IMPLICIT statement, storing the types for | |
2539 | gfc_set_implicit() if the statement is accepted by the parser. | |
2540 | There is a strange looking, but legal syntactic construction | |
2541 | possible. It looks like: | |
2542 | ||
2543 | IMPLICIT INTEGER (a-b) (c-d) | |
2544 | ||
2545 | This is legal if "a-b" is a constant expression that happens to | |
2546 | equal one of the legal kinds for integers. The real problem | |
2547 | happens with an implicit specification that looks like: | |
2548 | ||
2549 | IMPLICIT INTEGER (a-b) | |
2550 | ||
2551 | In this case, a typespec matcher that is "greedy" (as most of the | |
2552 | matchers are) gobbles the character range as a kindspec, leaving | |
2553 | nothing left. We therefore have to go a bit more slowly in the | |
2554 | matching process by inhibiting the kindspec checking during | |
2555 | typespec matching and checking for a kind later. */ | |
2556 | ||
2557 | match | |
2558 | gfc_match_implicit (void) | |
2559 | { | |
2560 | gfc_typespec ts; | |
2561 | locus cur_loc; | |
e0be6f02 | 2562 | char c; |
39351103 | 2563 | match m; |
2564 | ||
52179f31 | 2565 | gfc_clear_ts (&ts); |
2566 | ||
39351103 | 2567 | /* We don't allow empty implicit statements. */ |
2568 | if (gfc_match_eos () == MATCH_YES) | |
2569 | { | |
2570 | gfc_error ("Empty IMPLICIT statement at %C"); | |
2571 | return MATCH_ERROR; | |
2572 | } | |
2573 | ||
39351103 | 2574 | do |
2575 | { | |
b70528c7 | 2576 | /* First cleanup. */ |
2577 | gfc_clear_new_implicit (); | |
2578 | ||
39351103 | 2579 | /* A basic type is mandatory here. */ |
67a51c8e | 2580 | m = gfc_match_type_spec (&ts, 1); |
39351103 | 2581 | if (m == MATCH_ERROR) |
2582 | goto error; | |
2583 | if (m == MATCH_NO) | |
2584 | goto syntax; | |
2585 | ||
2586 | cur_loc = gfc_current_locus; | |
b70528c7 | 2587 | m = match_implicit_range (); |
39351103 | 2588 | |
2589 | if (m == MATCH_YES) | |
2590 | { | |
b70528c7 | 2591 | /* We may have <TYPE> (<RANGE>). */ |
39351103 | 2592 | gfc_gobble_whitespace (); |
e0be6f02 | 2593 | c = gfc_next_ascii_char (); |
39351103 | 2594 | if ((c == '\n') || (c == ',')) |
b70528c7 | 2595 | { |
2596 | /* Check for CHARACTER with no length parameter. */ | |
2597 | if (ts.type == BT_CHARACTER && !ts.cl) | |
2598 | { | |
b8a891cb | 2599 | ts.kind = gfc_default_character_kind; |
b70528c7 | 2600 | ts.cl = gfc_get_charlen (); |
2601 | ts.cl->next = gfc_current_ns->cl_list; | |
2602 | gfc_current_ns->cl_list = ts.cl; | |
2603 | ts.cl->length = gfc_int_expr (1); | |
2604 | } | |
2605 | ||
2606 | /* Record the Successful match. */ | |
2607 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2608 | return MATCH_ERROR; | |
2609 | continue; | |
2610 | } | |
39351103 | 2611 | |
2612 | gfc_current_locus = cur_loc; | |
2613 | } | |
2614 | ||
b70528c7 | 2615 | /* Discard the (incorrectly) matched range. */ |
2616 | gfc_clear_new_implicit (); | |
2617 | ||
2618 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
2619 | if (ts.type == BT_CHARACTER) | |
2620 | m = match_char_spec (&ts); | |
2621 | else | |
39351103 | 2622 | { |
67a51c8e | 2623 | m = gfc_match_kind_spec (&ts, false); |
39351103 | 2624 | if (m == MATCH_NO) |
b70528c7 | 2625 | { |
2626 | m = gfc_match_old_kind_spec (&ts); | |
2627 | if (m == MATCH_ERROR) | |
2628 | goto error; | |
2629 | if (m == MATCH_NO) | |
2630 | goto syntax; | |
2631 | } | |
39351103 | 2632 | } |
b70528c7 | 2633 | if (m == MATCH_ERROR) |
2634 | goto error; | |
39351103 | 2635 | |
b70528c7 | 2636 | m = match_implicit_range (); |
39351103 | 2637 | if (m == MATCH_ERROR) |
2638 | goto error; | |
2639 | if (m == MATCH_NO) | |
2640 | goto syntax; | |
2641 | ||
2642 | gfc_gobble_whitespace (); | |
e0be6f02 | 2643 | c = gfc_next_ascii_char (); |
39351103 | 2644 | if ((c != '\n') && (c != ',')) |
2645 | goto syntax; | |
2646 | ||
b70528c7 | 2647 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2648 | return MATCH_ERROR; | |
39351103 | 2649 | } |
2650 | while (c == ','); | |
2651 | ||
b70528c7 | 2652 | return MATCH_YES; |
39351103 | 2653 | |
2654 | syntax: | |
2655 | gfc_syntax_error (ST_IMPLICIT); | |
2656 | ||
2657 | error: | |
2658 | return MATCH_ERROR; | |
2659 | } | |
2660 | ||
f6d0e37a | 2661 | |
d67fc9ae | 2662 | match |
2663 | gfc_match_import (void) | |
2664 | { | |
2665 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2666 | match m; | |
2667 | gfc_symbol *sym; | |
2668 | gfc_symtree *st; | |
2669 | ||
f6d0e37a | 2670 | if (gfc_current_ns->proc_name == NULL |
2671 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
d67fc9ae | 2672 | { |
2673 | gfc_error ("IMPORT statement at %C only permitted in " | |
2674 | "an INTERFACE body"); | |
2675 | return MATCH_ERROR; | |
2676 | } | |
2677 | ||
1a9745d2 | 2678 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
d67fc9ae | 2679 | == FAILURE) |
2680 | return MATCH_ERROR; | |
2681 | ||
2682 | if (gfc_match_eos () == MATCH_YES) | |
2683 | { | |
2684 | /* All host variables should be imported. */ | |
2685 | gfc_current_ns->has_import_set = 1; | |
2686 | return MATCH_YES; | |
2687 | } | |
2688 | ||
2689 | if (gfc_match (" ::") == MATCH_YES) | |
2690 | { | |
2691 | if (gfc_match_eos () == MATCH_YES) | |
1a9745d2 | 2692 | { |
2693 | gfc_error ("Expecting list of named entities at %C"); | |
2694 | return MATCH_ERROR; | |
2695 | } | |
d67fc9ae | 2696 | } |
2697 | ||
2698 | for(;;) | |
2699 | { | |
2700 | m = gfc_match (" %n", name); | |
2701 | switch (m) | |
2702 | { | |
2703 | case MATCH_YES: | |
096d4ad9 | 2704 | if (gfc_current_ns->parent != NULL |
f6d0e37a | 2705 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
096d4ad9 | 2706 | { |
2707 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2708 | return MATCH_ERROR; | |
2709 | } | |
2710 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
f6d0e37a | 2711 | && gfc_find_symbol (name, |
2712 | gfc_current_ns->proc_name->ns->parent, | |
2713 | 1, &sym)) | |
1a9745d2 | 2714 | { |
2715 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2716 | return MATCH_ERROR; | |
2717 | } | |
2718 | ||
2719 | if (sym == NULL) | |
2720 | { | |
2721 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2722 | "at %C - does not exist.", name); | |
2723 | return MATCH_ERROR; | |
2724 | } | |
2725 | ||
e14bee04 | 2726 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) |
1a9745d2 | 2727 | { |
2728 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2729 | "at %C.", name); | |
2730 | goto next_item; | |
2731 | } | |
2732 | ||
2733 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
2734 | st->n.sym = sym; | |
2735 | sym->refs++; | |
c723595c | 2736 | sym->attr.imported = 1; |
d67fc9ae | 2737 | |
2738 | goto next_item; | |
2739 | ||
2740 | case MATCH_NO: | |
2741 | break; | |
2742 | ||
2743 | case MATCH_ERROR: | |
2744 | return MATCH_ERROR; | |
2745 | } | |
2746 | ||
2747 | next_item: | |
2748 | if (gfc_match_eos () == MATCH_YES) | |
2749 | break; | |
2750 | if (gfc_match_char (',') != MATCH_YES) | |
2751 | goto syntax; | |
2752 | } | |
2753 | ||
2754 | return MATCH_YES; | |
2755 | ||
2756 | syntax: | |
2757 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2758 | return MATCH_ERROR; | |
2759 | } | |
39351103 | 2760 | |
f6d0e37a | 2761 | |
c72e5f7e | 2762 | /* A minimal implementation of gfc_match without whitespace, escape |
2763 | characters or variable arguments. Returns true if the next | |
2764 | characters match the TARGET template exactly. */ | |
2765 | ||
2766 | static bool | |
2767 | match_string_p (const char *target) | |
2768 | { | |
2769 | const char *p; | |
2770 | ||
2771 | for (p = target; *p; p++) | |
e0be6f02 | 2772 | if ((char) gfc_next_ascii_char () != *p) |
c72e5f7e | 2773 | return false; |
2774 | return true; | |
2775 | } | |
2776 | ||
4ee9c684 | 2777 | /* Matches an attribute specification including array specs. If |
2778 | successful, leaves the variables current_attr and current_as | |
2779 | holding the specification. Also sets the colon_seen variable for | |
2780 | later use by matchers associated with initializations. | |
2781 | ||
2782 | This subroutine is a little tricky in the sense that we don't know | |
2783 | if we really have an attr-spec until we hit the double colon. | |
2784 | Until that time, we can only return MATCH_NO. This forces us to | |
2785 | check for duplicate specification at this level. */ | |
2786 | ||
2787 | static match | |
2788 | match_attr_spec (void) | |
2789 | { | |
4ee9c684 | 2790 | /* Modifiers that can exist in a type statement. */ |
2791 | typedef enum | |
2792 | { GFC_DECL_BEGIN = 0, | |
2793 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
2794 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
3ea52af3 | 2795 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
2796 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
c72e5f7e | 2797 | DECL_IS_BIND_C, DECL_NONE, |
4ee9c684 | 2798 | GFC_DECL_END /* Sentinel */ |
2799 | } | |
2800 | decl_types; | |
2801 | ||
2802 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
2803 | #define NUM_DECL GFC_DECL_END | |
2804 | ||
4ee9c684 | 2805 | locus start, seen_at[NUM_DECL]; |
2806 | int seen[NUM_DECL]; | |
2807 | decl_types d; | |
2808 | const char *attr; | |
2809 | match m; | |
f6bb8f4b | 2810 | gfc_try t; |
4ee9c684 | 2811 | |
2812 | gfc_clear_attr (¤t_attr); | |
cbb9e6aa | 2813 | start = gfc_current_locus; |
4ee9c684 | 2814 | |
2815 | current_as = NULL; | |
2816 | colon_seen = 0; | |
2817 | ||
2818 | /* See if we get all of the keywords up to the final double colon. */ | |
2819 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2820 | seen[d] = 0; | |
2821 | ||
2822 | for (;;) | |
2823 | { | |
e0be6f02 | 2824 | char ch; |
c5d33754 | 2825 | |
c72e5f7e | 2826 | d = DECL_NONE; |
2827 | gfc_gobble_whitespace (); | |
2828 | ||
e0be6f02 | 2829 | ch = gfc_next_ascii_char (); |
c72e5f7e | 2830 | if (ch == ':') |
2831 | { | |
2832 | /* This is the successful exit condition for the loop. */ | |
e0be6f02 | 2833 | if (gfc_next_ascii_char () == ':') |
c72e5f7e | 2834 | break; |
2835 | } | |
2836 | else if (ch == ',') | |
c5d33754 | 2837 | { |
c5d33754 | 2838 | gfc_gobble_whitespace (); |
e0be6f02 | 2839 | switch (gfc_peek_ascii_char ()) |
c5d33754 | 2840 | { |
c72e5f7e | 2841 | case 'a': |
2842 | if (match_string_p ("allocatable")) | |
2843 | d = DECL_ALLOCATABLE; | |
2844 | break; | |
2845 | ||
2846 | case 'b': | |
c5d33754 | 2847 | /* Try and match the bind(c). */ |
75ae7f6c | 2848 | m = gfc_match_bind_c (NULL, true); |
5cf92482 | 2849 | if (m == MATCH_YES) |
c5d33754 | 2850 | d = DECL_IS_BIND_C; |
5cf92482 | 2851 | else if (m == MATCH_ERROR) |
2852 | goto cleanup; | |
c72e5f7e | 2853 | break; |
2854 | ||
2855 | case 'd': | |
2856 | if (match_string_p ("dimension")) | |
2857 | d = DECL_DIMENSION; | |
2858 | break; | |
2859 | ||
2860 | case 'e': | |
2861 | if (match_string_p ("external")) | |
2862 | d = DECL_EXTERNAL; | |
2863 | break; | |
2864 | ||
2865 | case 'i': | |
2866 | if (match_string_p ("int")) | |
2867 | { | |
e0be6f02 | 2868 | ch = gfc_next_ascii_char (); |
c72e5f7e | 2869 | if (ch == 'e') |
2870 | { | |
2871 | if (match_string_p ("nt")) | |
2872 | { | |
2873 | /* Matched "intent". */ | |
2874 | /* TODO: Call match_intent_spec from here. */ | |
2875 | if (gfc_match (" ( in out )") == MATCH_YES) | |
2876 | d = DECL_INOUT; | |
2877 | else if (gfc_match (" ( in )") == MATCH_YES) | |
2878 | d = DECL_IN; | |
2879 | else if (gfc_match (" ( out )") == MATCH_YES) | |
2880 | d = DECL_OUT; | |
2881 | } | |
2882 | } | |
2883 | else if (ch == 'r') | |
2884 | { | |
2885 | if (match_string_p ("insic")) | |
2886 | { | |
2887 | /* Matched "intrinsic". */ | |
2888 | d = DECL_INTRINSIC; | |
2889 | } | |
2890 | } | |
2891 | } | |
2892 | break; | |
2893 | ||
2894 | case 'o': | |
2895 | if (match_string_p ("optional")) | |
2896 | d = DECL_OPTIONAL; | |
2897 | break; | |
2898 | ||
2899 | case 'p': | |
e0be6f02 | 2900 | gfc_next_ascii_char (); |
2901 | switch (gfc_next_ascii_char ()) | |
c72e5f7e | 2902 | { |
2903 | case 'a': | |
2904 | if (match_string_p ("rameter")) | |
2905 | { | |
2906 | /* Matched "parameter". */ | |
2907 | d = DECL_PARAMETER; | |
2908 | } | |
2909 | break; | |
2910 | ||
2911 | case 'o': | |
2912 | if (match_string_p ("inter")) | |
2913 | { | |
2914 | /* Matched "pointer". */ | |
2915 | d = DECL_POINTER; | |
2916 | } | |
2917 | break; | |
2918 | ||
2919 | case 'r': | |
e0be6f02 | 2920 | ch = gfc_next_ascii_char (); |
c72e5f7e | 2921 | if (ch == 'i') |
2922 | { | |
2923 | if (match_string_p ("vate")) | |
2924 | { | |
2925 | /* Matched "private". */ | |
2926 | d = DECL_PRIVATE; | |
2927 | } | |
2928 | } | |
2929 | else if (ch == 'o') | |
2930 | { | |
2931 | if (match_string_p ("tected")) | |
2932 | { | |
2933 | /* Matched "protected". */ | |
2934 | d = DECL_PROTECTED; | |
2935 | } | |
2936 | } | |
2937 | break; | |
2938 | ||
2939 | case 'u': | |
2940 | if (match_string_p ("blic")) | |
2941 | { | |
2942 | /* Matched "public". */ | |
2943 | d = DECL_PUBLIC; | |
2944 | } | |
2945 | break; | |
2946 | } | |
2947 | break; | |
2948 | ||
2949 | case 's': | |
2950 | if (match_string_p ("save")) | |
2951 | d = DECL_SAVE; | |
2952 | break; | |
2953 | ||
2954 | case 't': | |
2955 | if (match_string_p ("target")) | |
2956 | d = DECL_TARGET; | |
2957 | break; | |
2958 | ||
2959 | case 'v': | |
e0be6f02 | 2960 | gfc_next_ascii_char (); |
2961 | ch = gfc_next_ascii_char (); | |
c72e5f7e | 2962 | if (ch == 'a') |
2963 | { | |
2964 | if (match_string_p ("lue")) | |
2965 | { | |
2966 | /* Matched "value". */ | |
2967 | d = DECL_VALUE; | |
2968 | } | |
2969 | } | |
2970 | else if (ch == 'o') | |
2971 | { | |
2972 | if (match_string_p ("latile")) | |
2973 | { | |
2974 | /* Matched "volatile". */ | |
2975 | d = DECL_VOLATILE; | |
2976 | } | |
2977 | } | |
2978 | break; | |
c5d33754 | 2979 | } |
2980 | } | |
f3f9b222 | 2981 | |
c72e5f7e | 2982 | /* No double colon and no recognizable decl_type, so assume that |
2983 | we've been looking at something else the whole time. */ | |
2984 | if (d == DECL_NONE) | |
2985 | { | |
2986 | m = MATCH_NO; | |
2987 | goto cleanup; | |
2988 | } | |
e14bee04 | 2989 | |
7e221851 | 2990 | /* Check to make sure any parens are paired up correctly. */ |
2991 | if (gfc_match_parens () == MATCH_ERROR) | |
2992 | { | |
2993 | m = MATCH_ERROR; | |
2994 | goto cleanup; | |
2995 | } | |
2996 | ||
4ee9c684 | 2997 | seen[d]++; |
cbb9e6aa | 2998 | seen_at[d] = gfc_current_locus; |
4ee9c684 | 2999 | |
3000 | if (d == DECL_DIMENSION) | |
3001 | { | |
3002 | m = gfc_match_array_spec (¤t_as); | |
3003 | ||
3004 | if (m == MATCH_NO) | |
3005 | { | |
3006 | gfc_error ("Missing dimension specification at %C"); | |
3007 | m = MATCH_ERROR; | |
3008 | } | |
3009 | ||
3010 | if (m == MATCH_ERROR) | |
3011 | goto cleanup; | |
3012 | } | |
3013 | } | |
3014 | ||
4ee9c684 | 3015 | /* Since we've seen a double colon, we have to be looking at an |
3016 | attr-spec. This means that we can now issue errors. */ | |
3017 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3018 | if (seen[d] > 1) | |
3019 | { | |
3020 | switch (d) | |
3021 | { | |
3022 | case DECL_ALLOCATABLE: | |
3023 | attr = "ALLOCATABLE"; | |
3024 | break; | |
3025 | case DECL_DIMENSION: | |
3026 | attr = "DIMENSION"; | |
3027 | break; | |
3028 | case DECL_EXTERNAL: | |
3029 | attr = "EXTERNAL"; | |
3030 | break; | |
3031 | case DECL_IN: | |
3032 | attr = "INTENT (IN)"; | |
3033 | break; | |
3034 | case DECL_OUT: | |
3035 | attr = "INTENT (OUT)"; | |
3036 | break; | |
3037 | case DECL_INOUT: | |
3038 | attr = "INTENT (IN OUT)"; | |
3039 | break; | |
3040 | case DECL_INTRINSIC: | |
3041 | attr = "INTRINSIC"; | |
3042 | break; | |
3043 | case DECL_OPTIONAL: | |
3044 | attr = "OPTIONAL"; | |
3045 | break; | |
3046 | case DECL_PARAMETER: | |
3047 | attr = "PARAMETER"; | |
3048 | break; | |
3049 | case DECL_POINTER: | |
3050 | attr = "POINTER"; | |
3051 | break; | |
3ea52af3 | 3052 | case DECL_PROTECTED: |
3053 | attr = "PROTECTED"; | |
3054 | break; | |
4ee9c684 | 3055 | case DECL_PRIVATE: |
3056 | attr = "PRIVATE"; | |
3057 | break; | |
3058 | case DECL_PUBLIC: | |
3059 | attr = "PUBLIC"; | |
3060 | break; | |
3061 | case DECL_SAVE: | |
3062 | attr = "SAVE"; | |
3063 | break; | |
3064 | case DECL_TARGET: | |
3065 | attr = "TARGET"; | |
3066 | break; | |
c5d33754 | 3067 | case DECL_IS_BIND_C: |
3068 | attr = "IS_BIND_C"; | |
3069 | break; | |
3070 | case DECL_VALUE: | |
3071 | attr = "VALUE"; | |
3072 | break; | |
ef814c81 | 3073 | case DECL_VOLATILE: |
3074 | attr = "VOLATILE"; | |
3075 | break; | |
4ee9c684 | 3076 | default: |
f6d0e37a | 3077 | attr = NULL; /* This shouldn't happen. */ |
4ee9c684 | 3078 | } |
3079 | ||
3080 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
3081 | m = MATCH_ERROR; | |
3082 | goto cleanup; | |
3083 | } | |
3084 | ||
3085 | /* Now that we've dealt with duplicate attributes, add the attributes | |
3086 | to the current attribute. */ | |
3087 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3088 | { | |
3089 | if (seen[d] == 0) | |
3090 | continue; | |
3091 | ||
3092 | if (gfc_current_state () == COMP_DERIVED | |
3093 | && d != DECL_DIMENSION && d != DECL_POINTER | |
c72e5f7e | 3094 | && d != DECL_PRIVATE && d != DECL_PUBLIC |
3095 | && d != DECL_NONE) | |
4ee9c684 | 3096 | { |
2294b616 | 3097 | if (d == DECL_ALLOCATABLE) |
3098 | { | |
1a9745d2 | 3099 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
3100 | "attribute at %C in a TYPE definition") | |
e14bee04 | 3101 | == FAILURE) |
2294b616 | 3102 | { |
3103 | m = MATCH_ERROR; | |
3104 | goto cleanup; | |
3105 | } | |
1a9745d2 | 3106 | } |
3107 | else | |
2294b616 | 3108 | { |
3109 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
e14bee04 | 3110 | &seen_at[d]); |
2294b616 | 3111 | m = MATCH_ERROR; |
3112 | goto cleanup; | |
3113 | } | |
4ee9c684 | 3114 | } |
3115 | ||
ea13b9b7 | 3116 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
1a9745d2 | 3117 | && gfc_current_state () != COMP_MODULE) |
ea13b9b7 | 3118 | { |
3119 | if (d == DECL_PRIVATE) | |
3120 | attr = "PRIVATE"; | |
3121 | else | |
3122 | attr = "PUBLIC"; | |
e14bee04 | 3123 | if (gfc_current_state () == COMP_DERIVED |
3124 | && gfc_state_stack->previous | |
3125 | && gfc_state_stack->previous->state == COMP_MODULE) | |
3126 | { | |
3127 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s " | |
3128 | "at %L in a TYPE definition", attr, | |
3129 | &seen_at[d]) | |
3130 | == FAILURE) | |
3131 | { | |
3132 | m = MATCH_ERROR; | |
3133 | goto cleanup; | |
3134 | } | |
3135 | } | |
3136 | else | |
3137 | { | |
3138 | gfc_error ("%s attribute at %L is not allowed outside of the " | |
3139 | "specification part of a module", attr, &seen_at[d]); | |
3140 | m = MATCH_ERROR; | |
3141 | goto cleanup; | |
3142 | } | |
ea13b9b7 | 3143 | } |
3144 | ||
4ee9c684 | 3145 | switch (d) |
3146 | { | |
3147 | case DECL_ALLOCATABLE: | |
3148 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
3149 | break; | |
3150 | ||
3151 | case DECL_DIMENSION: | |
950683ed | 3152 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 3153 | break; |
3154 | ||
3155 | case DECL_EXTERNAL: | |
3156 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
3157 | break; | |
3158 | ||
3159 | case DECL_IN: | |
3160 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
3161 | break; | |
3162 | ||
3163 | case DECL_OUT: | |
3164 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
3165 | break; | |
3166 | ||
3167 | case DECL_INOUT: | |
3168 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
3169 | break; | |
3170 | ||
3171 | case DECL_INTRINSIC: | |
3172 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
3173 | break; | |
3174 | ||
3175 | case DECL_OPTIONAL: | |
3176 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
3177 | break; | |
3178 | ||
3179 | case DECL_PARAMETER: | |
950683ed | 3180 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
4ee9c684 | 3181 | break; |
3182 | ||
3183 | case DECL_POINTER: | |
3184 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
3185 | break; | |
3186 | ||
3ea52af3 | 3187 | case DECL_PROTECTED: |
3188 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
3189 | { | |
3190 | gfc_error ("PROTECTED at %C only allowed in specification " | |
3191 | "part of a module"); | |
3192 | t = FAILURE; | |
3193 | break; | |
3194 | } | |
3195 | ||
1a9745d2 | 3196 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
3197 | "attribute at %C") | |
3ea52af3 | 3198 | == FAILURE) |
3199 | t = FAILURE; | |
3200 | else | |
3201 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
3202 | break; | |
3203 | ||
4ee9c684 | 3204 | case DECL_PRIVATE: |
950683ed | 3205 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
3206 | &seen_at[d]); | |
4ee9c684 | 3207 | break; |
3208 | ||
3209 | case DECL_PUBLIC: | |
950683ed | 3210 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
3211 | &seen_at[d]); | |
4ee9c684 | 3212 | break; |
3213 | ||
3214 | case DECL_SAVE: | |
950683ed | 3215 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 3216 | break; |
3217 | ||
3218 | case DECL_TARGET: | |
3219 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
3220 | break; | |
3221 | ||
c5d33754 | 3222 | case DECL_IS_BIND_C: |
3223 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); | |
3224 | break; | |
3225 | ||
8f6339b6 | 3226 | case DECL_VALUE: |
1a9745d2 | 3227 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
3228 | "at %C") | |
8f6339b6 | 3229 | == FAILURE) |
3230 | t = FAILURE; | |
3231 | else | |
3232 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
3233 | break; | |
3234 | ||
ef814c81 | 3235 | case DECL_VOLATILE: |
3236 | if (gfc_notify_std (GFC_STD_F2003, | |
1a9745d2 | 3237 | "Fortran 2003: VOLATILE attribute at %C") |
ef814c81 | 3238 | == FAILURE) |
3239 | t = FAILURE; | |
3240 | else | |
3241 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
3242 | break; | |
3243 | ||
4ee9c684 | 3244 | default: |
3245 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
3246 | } | |
3247 | ||
3248 | if (t == FAILURE) | |
3249 | { | |
3250 | m = MATCH_ERROR; | |
3251 | goto cleanup; | |
3252 | } | |
3253 | } | |
3254 | ||
3255 | colon_seen = 1; | |
3256 | return MATCH_YES; | |
3257 | ||
3258 | cleanup: | |
cbb9e6aa | 3259 | gfc_current_locus = start; |
4ee9c684 | 3260 | gfc_free_array_spec (current_as); |
3261 | current_as = NULL; | |
3262 | return m; | |
3263 | } | |
3264 | ||
3265 | ||
c5d33754 | 3266 | /* Set the binding label, dest_label, either with the binding label |
3267 | stored in the given gfc_typespec, ts, or if none was provided, it | |
3268 | will be the symbol name in all lower case, as required by the draft | |
3269 | (J3/04-007, section 15.4.1). If a binding label was given and | |
3270 | there is more than one argument (num_idents), it is an error. */ | |
3271 | ||
f6bb8f4b | 3272 | gfc_try |
c5d33754 | 3273 | set_binding_label (char *dest_label, const char *sym_name, int num_idents) |
3274 | { | |
825718f9 | 3275 | if (num_idents > 1 && has_name_equals) |
c5d33754 | 3276 | { |
825718f9 | 3277 | gfc_error ("Multiple identifiers provided with " |
3278 | "single NAME= specifier at %C"); | |
3279 | return FAILURE; | |
3280 | } | |
c5d33754 | 3281 | |
825718f9 | 3282 | if (curr_binding_label[0] != '\0') |
3283 | { | |
c5d33754 | 3284 | /* Binding label given; store in temp holder til have sym. */ |
b1223b39 | 3285 | strcpy (dest_label, curr_binding_label); |
c5d33754 | 3286 | } |
3287 | else | |
3288 | { | |
3289 | /* No binding label given, and the NAME= specifier did not exist, | |
3290 | which means there was no NAME="". */ | |
3291 | if (sym_name != NULL && has_name_equals == 0) | |
b1223b39 | 3292 | strcpy (dest_label, sym_name); |
c5d33754 | 3293 | } |
3294 | ||
3295 | return SUCCESS; | |
3296 | } | |
3297 | ||
3298 | ||
3299 | /* Set the status of the given common block as being BIND(C) or not, | |
3300 | depending on the given parameter, is_bind_c. */ | |
3301 | ||
3302 | void | |
3303 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) | |
3304 | { | |
3305 | com_block->is_bind_c = is_bind_c; | |
3306 | return; | |
3307 | } | |
3308 | ||
3309 | ||
3310 | /* Verify that the given gfc_typespec is for a C interoperable type. */ | |
3311 | ||
f6bb8f4b | 3312 | gfc_try |
209d3778 | 3313 | verify_c_interop (gfc_typespec *ts) |
c5d33754 | 3314 | { |
c5d33754 | 3315 | if (ts->type == BT_DERIVED && ts->derived != NULL) |
3316 | return (ts->derived->ts.is_c_interop ? SUCCESS : FAILURE); | |
3317 | else if (ts->is_c_interop != 1) | |
3318 | return FAILURE; | |
3319 | ||
3320 | return SUCCESS; | |
3321 | } | |
3322 | ||
3323 | ||
3324 | /* Verify that the variables of a given common block, which has been | |
3325 | defined with the attribute specifier bind(c), to be of a C | |
3326 | interoperable type. Errors will be reported here, if | |
3327 | encountered. */ | |
3328 | ||
f6bb8f4b | 3329 | gfc_try |
c5d33754 | 3330 | verify_com_block_vars_c_interop (gfc_common_head *com_block) |
3331 | { | |
3332 | gfc_symbol *curr_sym = NULL; | |
f6bb8f4b | 3333 | gfc_try retval = SUCCESS; |
c5d33754 | 3334 | |
3335 | curr_sym = com_block->head; | |
3336 | ||
3337 | /* Make sure we have at least one symbol. */ | |
3338 | if (curr_sym == NULL) | |
3339 | return retval; | |
3340 | ||
3341 | /* Here we know we have a symbol, so we'll execute this loop | |
3342 | at least once. */ | |
3343 | do | |
3344 | { | |
3345 | /* The second to last param, 1, says this is in a common block. */ | |
3346 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); | |
3347 | curr_sym = curr_sym->common_next; | |
3348 | } while (curr_sym != NULL); | |
3349 | ||
3350 | return retval; | |
3351 | } | |
3352 | ||
3353 | ||
3354 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, | |
3355 | an appropriate error message is reported. */ | |
3356 | ||
f6bb8f4b | 3357 | gfc_try |
c5d33754 | 3358 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, |
3359 | int is_in_common, gfc_common_head *com_block) | |
3360 | { | |
1f2ab120 | 3361 | bool bind_c_function = false; |
f6bb8f4b | 3362 | gfc_try retval = SUCCESS; |
4f7bb9ec | 3363 | |
1f2ab120 | 3364 | if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c) |
3365 | bind_c_function = true; | |
3366 | ||
4f7bb9ec | 3367 | if (tmp_sym->attr.function && tmp_sym->result != NULL) |
3368 | { | |
3369 | tmp_sym = tmp_sym->result; | |
3370 | /* Make sure it wasn't an implicitly typed result. */ | |
3371 | if (tmp_sym->attr.implicit_type) | |
3372 | { | |
3373 | gfc_warning ("Implicitly declared BIND(C) function '%s' at " | |
3374 | "%L may not be C interoperable", tmp_sym->name, | |
3375 | &tmp_sym->declared_at); | |
3376 | tmp_sym->ts.f90_type = tmp_sym->ts.type; | |
3377 | /* Mark it as C interoperable to prevent duplicate warnings. */ | |
3378 | tmp_sym->ts.is_c_interop = 1; | |
3379 | tmp_sym->attr.is_c_interop = 1; | |
3380 | } | |
3381 | } | |
1f2ab120 | 3382 | |
c5d33754 | 3383 | /* Here, we know we have the bind(c) attribute, so if we have |
3384 | enough type info, then verify that it's a C interop kind. | |
3385 | The info could be in the symbol already, or possibly still in | |
3386 | the given ts (current_ts), so look in both. */ | |
3387 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) | |
3388 | { | |
209d3778 | 3389 | if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS) |
c5d33754 | 3390 | { |
3391 | /* See if we're dealing with a sym in a common block or not. */ | |
3392 | if (is_in_common == 1) | |
3393 | { | |
3394 | gfc_warning ("Variable '%s' in common block '%s' at %L " | |
3395 | "may not be a C interoperable " | |
3396 | "kind though common block '%s' is BIND(C)", | |
3397 | tmp_sym->name, com_block->name, | |
3398 | &(tmp_sym->declared_at), com_block->name); | |
3399 | } | |
3400 | else | |
3401 | { | |
3402 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) | |
3403 | gfc_error ("Type declaration '%s' at %L is not C " | |
3404 | "interoperable but it is BIND(C)", | |
3405 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3406 | else | |
3407 | gfc_warning ("Variable '%s' at %L " | |
3408 | "may not be a C interoperable " | |
3409 | "kind but it is bind(c)", | |
3410 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3411 | } | |
3412 | } | |
3413 | ||
3414 | /* Variables declared w/in a common block can't be bind(c) | |
3415 | since there's no way for C to see these variables, so there's | |
3416 | semantically no reason for the attribute. */ | |
3417 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) | |
3418 | { | |
3419 | gfc_error ("Variable '%s' in common block '%s' at " | |
3420 | "%L cannot be declared with BIND(C) " | |
3421 | "since it is not a global", | |
3422 | tmp_sym->name, com_block->name, | |
3423 | &(tmp_sym->declared_at)); | |
3424 | retval = FAILURE; | |
3425 | } | |
3426 | ||
3427 | /* Scalar variables that are bind(c) can not have the pointer | |
3428 | or allocatable attributes. */ | |
3429 | if (tmp_sym->attr.is_bind_c == 1) | |
3430 | { | |
3431 | if (tmp_sym->attr.pointer == 1) | |
3432 | { | |
3433 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3434 | "POINTER and BIND(C) attributes", | |
3435 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3436 | retval = FAILURE; | |
3437 | } | |
3438 | ||
3439 | if (tmp_sym->attr.allocatable == 1) | |
3440 | { | |
3441 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3442 | "ALLOCATABLE and BIND(C) attributes", | |
3443 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3444 | retval = FAILURE; | |
3445 | } | |
3446 | ||
1f2ab120 | 3447 | } |
3448 | ||
3449 | /* If it is a BIND(C) function, make sure the return value is a | |
3450 | scalar value. The previous tests in this function made sure | |
3451 | the type is interoperable. */ | |
3452 | if (bind_c_function && tmp_sym->as != NULL) | |
3453 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3454 | "be an array", tmp_sym->name, &(tmp_sym->declared_at)); | |
3455 | ||
3456 | /* BIND(C) functions can not return a character string. */ | |
3457 | if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER) | |
3458 | if (tmp_sym->ts.cl == NULL || tmp_sym->ts.cl->length == NULL | |
3459 | || tmp_sym->ts.cl->length->expr_type != EXPR_CONSTANT | |
3460 | || mpz_cmp_si (tmp_sym->ts.cl->length->value.integer, 1) != 0) | |
3461 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
c5d33754 | 3462 | "be a character string", tmp_sym->name, |
3463 | &(tmp_sym->declared_at)); | |
c5d33754 | 3464 | } |
3465 | ||
3466 | /* See if the symbol has been marked as private. If it has, make sure | |
3467 | there is no binding label and warn the user if there is one. */ | |
3468 | if (tmp_sym->attr.access == ACCESS_PRIVATE | |
3469 | && tmp_sym->binding_label[0] != '\0') | |
3470 | /* Use gfc_warning_now because we won't say that the symbol fails | |
3471 | just because of this. */ | |
3472 | gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " | |
3473 | "given the binding label '%s'", tmp_sym->name, | |
3474 | &(tmp_sym->declared_at), tmp_sym->binding_label); | |
3475 | ||
3476 | return retval; | |
3477 | } | |
3478 | ||
3479 | ||
3480 | /* Set the appropriate fields for a symbol that's been declared as | |
3481 | BIND(C) (the is_bind_c flag and the binding label), and verify that | |
3482 | the type is C interoperable. Errors are reported by the functions | |
3483 | used to set/test these fields. */ | |
3484 | ||
f6bb8f4b | 3485 | gfc_try |
c5d33754 | 3486 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) |
3487 | { | |
f6bb8f4b | 3488 | gfc_try retval = SUCCESS; |
c5d33754 | 3489 | |
3490 | /* TODO: Do we need to make sure the vars aren't marked private? */ | |
3491 | ||
3492 | /* Set the is_bind_c bit in symbol_attribute. */ | |
3493 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); | |
3494 | ||
3495 | if (set_binding_label (tmp_sym->binding_label, tmp_sym->name, | |
3496 | num_idents) != SUCCESS) | |
3497 | return FAILURE; | |
3498 | ||
3499 | return retval; | |
3500 | } | |
3501 | ||
3502 | ||
3503 | /* Set the fields marking the given common block as BIND(C), including | |
3504 | a binding label, and report any errors encountered. */ | |
3505 | ||
f6bb8f4b | 3506 | gfc_try |
c5d33754 | 3507 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) |
3508 | { | |
f6bb8f4b | 3509 | gfc_try retval = SUCCESS; |
c5d33754 | 3510 | |
3511 | /* destLabel, common name, typespec (which may have binding label). */ | |
3512 | if (set_binding_label (com_block->binding_label, com_block->name, num_idents) | |
3513 | != SUCCESS) | |
3514 | return FAILURE; | |
3515 | ||
3516 | /* Set the given common block (com_block) to being bind(c) (1). */ | |
3517 | set_com_block_bind_c (com_block, 1); | |
3518 | ||
3519 | return retval; | |
3520 | } | |
3521 | ||
3522 | ||
3523 | /* Retrieve the list of one or more identifiers that the given bind(c) | |
3524 | attribute applies to. */ | |
3525 | ||
f6bb8f4b | 3526 | gfc_try |
c5d33754 | 3527 | get_bind_c_idents (void) |
3528 | { | |
3529 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3530 | int num_idents = 0; | |
3531 | gfc_symbol *tmp_sym = NULL; | |
3532 | match found_id; | |
3533 | gfc_common_head *com_block = NULL; | |
3534 | ||
3535 | if (gfc_match_name (name) == MATCH_YES) | |
3536 | { | |
3537 | found_id = MATCH_YES; | |
3538 | gfc_get_ha_symbol (name, &tmp_sym); | |
3539 | } | |
3540 | else if (match_common_name (name) == MATCH_YES) | |
3541 | { | |
3542 | found_id = MATCH_YES; | |
3543 | com_block = gfc_get_common (name, 0); | |
3544 | } | |
3545 | else | |
3546 | { | |
3547 | gfc_error ("Need either entity or common block name for " | |
3548 | "attribute specification statement at %C"); | |
3549 | return FAILURE; | |
3550 | } | |
3551 | ||
3552 | /* Save the current identifier and look for more. */ | |
3553 | do | |
3554 | { | |
3555 | /* Increment the number of identifiers found for this spec stmt. */ | |
3556 | num_idents++; | |
3557 | ||
3558 | /* Make sure we have a sym or com block, and verify that it can | |
3559 | be bind(c). Set the appropriate field(s) and look for more | |
3560 | identifiers. */ | |
3561 | if (tmp_sym != NULL || com_block != NULL) | |
3562 | { | |
3563 | if (tmp_sym != NULL) | |
3564 | { | |
3565 | if (set_verify_bind_c_sym (tmp_sym, num_idents) | |
3566 | != SUCCESS) | |
3567 | return FAILURE; | |
3568 | } | |
3569 | else | |
3570 | { | |
3571 | if (set_verify_bind_c_com_block(com_block, num_idents) | |
3572 | != SUCCESS) | |
3573 | return FAILURE; | |
3574 | } | |
3575 | ||
3576 | /* Look to see if we have another identifier. */ | |
3577 | tmp_sym = NULL; | |
3578 | if (gfc_match_eos () == MATCH_YES) | |
3579 | found_id = MATCH_NO; | |
3580 | else if (gfc_match_char (',') != MATCH_YES) | |
3581 | found_id = MATCH_NO; | |
3582 | else if (gfc_match_name (name) == MATCH_YES) | |
3583 | { | |
3584 | found_id = MATCH_YES; | |
3585 | gfc_get_ha_symbol (name, &tmp_sym); | |
3586 | } | |
3587 | else if (match_common_name (name) == MATCH_YES) | |
3588 | { | |
3589 | found_id = MATCH_YES; | |
3590 | com_block = gfc_get_common (name, 0); | |
3591 | } | |
3592 | else | |
3593 | { | |
3594 | gfc_error ("Missing entity or common block name for " | |
3595 | "attribute specification statement at %C"); | |
3596 | return FAILURE; | |
3597 | } | |
3598 | } | |
3599 | else | |
3600 | { | |
3601 | gfc_internal_error ("Missing symbol"); | |
3602 | } | |
3603 | } while (found_id == MATCH_YES); | |
3604 | ||
3605 | /* if we get here we were successful */ | |
3606 | return SUCCESS; | |
3607 | } | |
3608 | ||
3609 | ||
3610 | /* Try and match a BIND(C) attribute specification statement. */ | |
3611 | ||
3612 | match | |
3613 | gfc_match_bind_c_stmt (void) | |
3614 | { | |
3615 | match found_match = MATCH_NO; | |
3616 | gfc_typespec *ts; | |
3617 | ||
3618 | ts = ¤t_ts; | |
3619 | ||
3620 | /* This may not be necessary. */ | |
3621 | gfc_clear_ts (ts); | |
3622 | /* Clear the temporary binding label holder. */ | |
3623 | curr_binding_label[0] = '\0'; | |
3624 | ||
3625 | /* Look for the bind(c). */ | |
75ae7f6c | 3626 | found_match = gfc_match_bind_c (NULL, true); |
c5d33754 | 3627 | |
3628 | if (found_match == MATCH_YES) | |
3629 | { | |
3630 | /* Look for the :: now, but it is not required. */ | |
3631 | gfc_match (" :: "); | |
3632 | ||
3633 | /* Get the identifier(s) that needs to be updated. This may need to | |
3634 | change to hand the flag(s) for the attr specified so all identifiers | |
3635 | found can have all appropriate parts updated (assuming that the same | |
3636 | spec stmt can have multiple attrs, such as both bind(c) and | |
3637 | allocatable...). */ | |
3638 | if (get_bind_c_idents () != SUCCESS) | |
3639 | /* Error message should have printed already. */ | |
3640 | return MATCH_ERROR; | |
3641 | } | |
3642 | ||
3643 | return found_match; | |
3644 | } | |
3645 | ||
3646 | ||
4ee9c684 | 3647 | /* Match a data declaration statement. */ |
3648 | ||
3649 | match | |
3650 | gfc_match_data_decl (void) | |
3651 | { | |
3652 | gfc_symbol *sym; | |
3653 | match m; | |
3923b69f | 3654 | int elem; |
4ee9c684 | 3655 | |
c5d33754 | 3656 | num_idents_on_line = 0; |
3657 | ||
67a51c8e | 3658 | m = gfc_match_type_spec (¤t_ts, 0); |
4ee9c684 | 3659 | if (m != MATCH_YES) |
3660 | return m; | |
3661 | ||
3662 | if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) | |
3663 | { | |
3664 | sym = gfc_use_derived (current_ts.derived); | |
3665 | ||
3666 | if (sym == NULL) | |
3667 | { | |
3668 | m = MATCH_ERROR; | |
3669 | goto cleanup; | |
3670 | } | |
3671 | ||
3672 | current_ts.derived = sym; | |
3673 | } | |
3674 | ||
3675 | m = match_attr_spec (); | |
3676 | if (m == MATCH_ERROR) | |
3677 | { | |
3678 | m = MATCH_NO; | |
3679 | goto cleanup; | |
3680 | } | |
3681 | ||
e6b82afc | 3682 | if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL |
3683 | && !current_ts.derived->attr.zero_comp) | |
4ee9c684 | 3684 | { |
3685 | ||
3686 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
3687 | goto ok; | |
3688 | ||
40cf8078 | 3689 | gfc_find_symbol (current_ts.derived->name, |
1a9745d2 | 3690 | current_ts.derived->ns->parent, 1, &sym); |
4ee9c684 | 3691 | |
40cf8078 | 3692 | /* Any symbol that we find had better be a type definition |
1a9745d2 | 3693 | which has its components defined. */ |
40cf8078 | 3694 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
e6b82afc | 3695 | && (current_ts.derived->components != NULL |
3696 | || current_ts.derived->attr.zero_comp)) | |
4ee9c684 | 3697 | goto ok; |
3698 | ||
40cf8078 | 3699 | /* Now we have an error, which we signal, and then fix up |
3700 | because the knock-on is plain and simple confusing. */ | |
3701 | gfc_error_now ("Derived type at %C has not been previously defined " | |
1a9745d2 | 3702 | "and so cannot appear in a derived type definition"); |
40cf8078 | 3703 | current_attr.pointer = 1; |
3704 | goto ok; | |
4ee9c684 | 3705 | } |
3706 | ||
3707 | ok: | |
3708 | /* If we have an old-style character declaration, and no new-style | |
3709 | attribute specifications, then there a comma is optional between | |
3710 | the type specification and the variable list. */ | |
3711 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
3712 | gfc_match_char (','); | |
3713 | ||
3923b69f | 3714 | /* Give the types/attributes to symbols that follow. Give the element |
3715 | a number so that repeat character length expressions can be copied. */ | |
3716 | elem = 1; | |
4ee9c684 | 3717 | for (;;) |
3718 | { | |
c5d33754 | 3719 | num_idents_on_line++; |
3923b69f | 3720 | m = variable_decl (elem++); |
4ee9c684 | 3721 | if (m == MATCH_ERROR) |
3722 | goto cleanup; | |
3723 | if (m == MATCH_NO) | |
3724 | break; | |
3725 | ||
3726 | if (gfc_match_eos () == MATCH_YES) | |
3727 | goto cleanup; | |
3728 | if (gfc_match_char (',') != MATCH_YES) | |
3729 | break; | |
3730 | } | |
3731 | ||
8f0bdb23 | 3732 | if (gfc_error_flag_test () == 0) |
3733 | gfc_error ("Syntax error in data declaration at %C"); | |
4ee9c684 | 3734 | m = MATCH_ERROR; |
3735 | ||
af29c1f0 | 3736 | gfc_free_data_all (gfc_current_ns); |
3737 | ||
4ee9c684 | 3738 | cleanup: |
3739 | gfc_free_array_spec (current_as); | |
3740 | current_as = NULL; | |
3741 | return m; | |
3742 | } | |
3743 | ||
3744 | ||
3745 | /* Match a prefix associated with a function or subroutine | |
3746 | declaration. If the typespec pointer is nonnull, then a typespec | |
3747 | can be matched. Note that if nothing matches, MATCH_YES is | |
3748 | returned (the null string was matched). */ | |
3749 | ||
077932f9 | 3750 | match |
3751 | gfc_match_prefix (gfc_typespec *ts) | |
4ee9c684 | 3752 | { |
5b11d932 | 3753 | bool seen_type; |
4ee9c684 | 3754 | |
3755 | gfc_clear_attr (¤t_attr); | |
3756 | seen_type = 0; | |
3757 | ||
d1645c7b | 3758 | gcc_assert (!gfc_matching_prefix); |
3759 | gfc_matching_prefix = true; | |
40de255b | 3760 | |
4ee9c684 | 3761 | loop: |
3762 | if (!seen_type && ts != NULL | |
67a51c8e | 3763 | && gfc_match_type_spec (ts, 0) == MATCH_YES |
4ee9c684 | 3764 | && gfc_match_space () == MATCH_YES) |
3765 | { | |
3766 | ||
3767 | seen_type = 1; | |
3768 | goto loop; | |
3769 | } | |
3770 | ||
3771 | if (gfc_match ("elemental% ") == MATCH_YES) | |
3772 | { | |
3773 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
40de255b | 3774 | goto error; |
4ee9c684 | 3775 | |
3776 | goto loop; | |
3777 | } | |
3778 | ||
3779 | if (gfc_match ("pure% ") == MATCH_YES) | |
3780 | { | |
3781 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
40de255b | 3782 | goto error; |
4ee9c684 | 3783 | |
3784 | goto loop; | |
3785 | } | |
3786 | ||
3787 | if (gfc_match ("recursive% ") == MATCH_YES) | |
3788 | { | |
3789 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
40de255b | 3790 | goto error; |
4ee9c684 | 3791 | |
3792 | goto loop; | |
3793 | } | |
3794 | ||
3795 | /* At this point, the next item is not a prefix. */ | |
d1645c7b | 3796 | gcc_assert (gfc_matching_prefix); |
3797 | gfc_matching_prefix = false; | |
4ee9c684 | 3798 | return MATCH_YES; |
40de255b | 3799 | |
3800 | error: | |
d1645c7b | 3801 | gcc_assert (gfc_matching_prefix); |
3802 | gfc_matching_prefix = false; | |
40de255b | 3803 | return MATCH_ERROR; |
4ee9c684 | 3804 | } |
3805 | ||
3806 | ||
077932f9 | 3807 | /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */ |
4ee9c684 | 3808 | |
f6bb8f4b | 3809 | static gfc_try |
1a9745d2 | 3810 | copy_prefix (symbol_attribute *dest, locus *where) |
4ee9c684 | 3811 | { |
4ee9c684 | 3812 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
3813 | return FAILURE; | |
3814 | ||
3815 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
3816 | return FAILURE; | |
3817 | ||
3818 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
3819 | return FAILURE; | |
3820 | ||
3821 | return SUCCESS; | |
3822 | } | |
3823 | ||
3824 | ||
3825 | /* Match a formal argument list. */ | |
3826 | ||
3827 | match | |
1a9745d2 | 3828 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
4ee9c684 | 3829 | { |
3830 | gfc_formal_arglist *head, *tail, *p, *q; | |
3831 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3832 | gfc_symbol *sym; | |
3833 | match m; | |
3834 | ||
3835 | head = tail = NULL; | |
3836 | ||
3837 | if (gfc_match_char ('(') != MATCH_YES) | |
3838 | { | |
3839 | if (null_flag) | |
3840 | goto ok; | |
3841 | return MATCH_NO; | |
3842 | } | |
3843 | ||
3844 | if (gfc_match_char (')') == MATCH_YES) | |
3845 | goto ok; | |
3846 | ||
3847 | for (;;) | |
3848 | { | |
3849 | if (gfc_match_char ('*') == MATCH_YES) | |
3850 | sym = NULL; | |
3851 | else | |
3852 | { | |
3853 | m = gfc_match_name (name); | |
3854 | if (m != MATCH_YES) | |
3855 | goto cleanup; | |
3856 | ||
3857 | if (gfc_get_symbol (name, NULL, &sym)) | |
3858 | goto cleanup; | |
3859 | } | |
3860 | ||
3861 | p = gfc_get_formal_arglist (); | |
3862 | ||
3863 | if (head == NULL) | |
3864 | head = tail = p; | |
3865 | else | |
3866 | { | |
3867 | tail->next = p; | |
3868 | tail = p; | |
3869 | } | |
3870 | ||
3871 | tail->sym = sym; | |
3872 | ||
3873 | /* We don't add the VARIABLE flavor because the name could be a | |
1a9745d2 | 3874 | dummy procedure. We don't apply these attributes to formal |
3875 | arguments of statement functions. */ | |
4ee9c684 | 3876 | if (sym != NULL && !st_flag |
950683ed | 3877 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
4ee9c684 | 3878 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
3879 | { | |
3880 | m = MATCH_ERROR; | |
3881 | goto cleanup; | |
3882 | } | |
3883 | ||
3884 | /* The name of a program unit can be in a different namespace, | |
1a9745d2 | 3885 | so check for it explicitly. After the statement is accepted, |
3886 | the name is checked for especially in gfc_get_symbol(). */ | |
4ee9c684 | 3887 | if (gfc_new_block != NULL && sym != NULL |
3888 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
3889 | { | |
3890 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
3891 | sym->name); | |
3892 | m = MATCH_ERROR; | |
3893 | goto cleanup; | |
3894 | } | |
3895 | ||
3896 | if (gfc_match_char (')') == MATCH_YES) | |
3897 | goto ok; | |
3898 | ||
3899 | m = gfc_match_char (','); | |
3900 | if (m != MATCH_YES) | |
3901 | { | |
3902 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
3903 | goto cleanup; | |
3904 | } | |
3905 | } | |
3906 | ||
3907 | ok: | |
3908 | /* Check for duplicate symbols in the formal argument list. */ | |
3909 | if (head != NULL) | |
3910 | { | |
3911 | for (p = head; p->next; p = p->next) | |
3912 | { | |
3913 | if (p->sym == NULL) | |
3914 | continue; | |
3915 | ||
3916 | for (q = p->next; q; q = q->next) | |
3917 | if (p->sym == q->sym) | |
3918 | { | |
1a9745d2 | 3919 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
3920 | "at %C", p->sym->name); | |
4ee9c684 | 3921 | |
3922 | m = MATCH_ERROR; | |
3923 | goto cleanup; | |
3924 | } | |
3925 | } | |
3926 | } | |
3927 | ||
f6d0e37a | 3928 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) |
3929 | == FAILURE) | |
4ee9c684 | 3930 | { |
3931 | m = MATCH_ERROR; | |
3932 | goto cleanup; | |
3933 | } | |
3934 | ||
3935 | return MATCH_YES; | |
3936 | ||
3937 | cleanup: | |
3938 | gfc_free_formal_arglist (head); | |
3939 | return m; | |
3940 | } | |
3941 | ||
3942 | ||
3943 | /* Match a RESULT specification following a function declaration or | |
3944 | ENTRY statement. Also matches the end-of-statement. */ | |
3945 | ||
3946 | static match | |
f6d0e37a | 3947 | match_result (gfc_symbol *function, gfc_symbol **result) |
4ee9c684 | 3948 | { |
3949 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3950 | gfc_symbol *r; | |
3951 | match m; | |
3952 | ||
3953 | if (gfc_match (" result (") != MATCH_YES) | |
3954 | return MATCH_NO; | |
3955 | ||
3956 | m = gfc_match_name (name); | |
3957 | if (m != MATCH_YES) | |
3958 | return m; | |
3959 | ||
c5d33754 | 3960 | /* Get the right paren, and that's it because there could be the |
3961 | bind(c) attribute after the result clause. */ | |
3962 | if (gfc_match_char(')') != MATCH_YES) | |
4ee9c684 | 3963 | { |
c5d33754 | 3964 | /* TODO: should report the missing right paren here. */ |
4ee9c684 | 3965 | return MATCH_ERROR; |
3966 | } | |
3967 | ||
3968 | if (strcmp (function->name, name) == 0) | |
3969 | { | |
1a9745d2 | 3970 | gfc_error ("RESULT variable at %C must be different than function name"); |
4ee9c684 | 3971 | return MATCH_ERROR; |
3972 | } | |
3973 | ||
3974 | if (gfc_get_symbol (name, NULL, &r)) | |
3975 | return MATCH_ERROR; | |
3976 | ||
f6d3042b | 3977 | if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE) |
4ee9c684 | 3978 | return MATCH_ERROR; |
3979 | ||
3980 | *result = r; | |
3981 | ||
3982 | return MATCH_YES; | |
3983 | } | |
3984 | ||
3985 | ||
c5d33754 | 3986 | /* Match a function suffix, which could be a combination of a result |
3987 | clause and BIND(C), either one, or neither. The draft does not | |
3988 | require them to come in a specific order. */ | |
3989 | ||
3990 | match | |
3991 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) | |
3992 | { | |
3993 | match is_bind_c; /* Found bind(c). */ | |
3994 | match is_result; /* Found result clause. */ | |
3995 | match found_match; /* Status of whether we've found a good match. */ | |
e0be6f02 | 3996 | char peek_char; /* Character we're going to peek at. */ |
75ae7f6c | 3997 | bool allow_binding_name; |
c5d33754 | 3998 | |
3999 | /* Initialize to having found nothing. */ | |
4000 | found_match = MATCH_NO; | |
4001 | is_bind_c = MATCH_NO; | |
4002 | is_result = MATCH_NO; | |
4003 | ||
4004 | /* Get the next char to narrow between result and bind(c). */ | |
4005 | gfc_gobble_whitespace (); | |
e0be6f02 | 4006 | peek_char = gfc_peek_ascii_char (); |
c5d33754 | 4007 | |
75ae7f6c | 4008 | /* C binding names are not allowed for internal procedures. */ |
4009 | if (gfc_current_state () == COMP_CONTAINS | |
4010 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
4011 | allow_binding_name = false; | |
4012 | else | |
4013 | allow_binding_name = true; | |
4014 | ||
c5d33754 | 4015 | switch (peek_char) |
4016 | { | |
4017 | case 'r': | |
4018 | /* Look for result clause. */ | |
4019 | is_result = match_result (sym, result); | |
4020 | if (is_result == MATCH_YES) | |
4021 | { | |
4022 | /* Now see if there is a bind(c) after it. */ | |
75ae7f6c | 4023 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 4024 | /* We've found the result clause and possibly bind(c). */ |
4025 | found_match = MATCH_YES; | |
4026 | } | |
4027 | else | |
4028 | /* This should only be MATCH_ERROR. */ | |
4029 | found_match = is_result; | |
4030 | break; | |
4031 | case 'b': | |
4032 | /* Look for bind(c) first. */ | |
75ae7f6c | 4033 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 4034 | if (is_bind_c == MATCH_YES) |
4035 | { | |
4036 | /* Now see if a result clause followed it. */ | |
4037 | is_result = match_result (sym, result); | |
4038 | found_match = MATCH_YES; | |
4039 | } | |
4040 | else | |
4041 | { | |
4042 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ | |
4043 | found_match = MATCH_ERROR; | |
4044 | } | |
4045 | break; | |
4046 | default: | |
4047 | gfc_error ("Unexpected junk after function declaration at %C"); | |
4048 | found_match = MATCH_ERROR; | |
4049 | break; | |
4050 | } | |
4051 | ||
c5d33754 | 4052 | if (is_bind_c == MATCH_YES) |
4518e961 | 4053 | { |
75ae7f6c | 4054 | /* Fortran 2008 draft allows BIND(C) for internal procedures. */ |
4518e961 | 4055 | if (gfc_current_state () == COMP_CONTAINS |
75ae7f6c | 4056 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
2dcae6c7 | 4057 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
4058 | "at %L may not be specified for an internal " | |
4059 | "procedure", &gfc_current_locus) | |
75ae7f6c | 4060 | == FAILURE) |
4061 | return MATCH_ERROR; | |
4062 | ||
4518e961 | 4063 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) |
4064 | == FAILURE) | |
4065 | return MATCH_ERROR; | |
4066 | } | |
c5d33754 | 4067 | |
4068 | return found_match; | |
4069 | } | |
4070 | ||
4071 | ||
af1a34ee | 4072 | /* Match a PROCEDURE declaration (R1211). */ |
4073 | ||
4074 | static match | |
4075 | match_procedure_decl (void) | |
4076 | { | |
4077 | match m; | |
4078 | locus old_loc, entry_loc; | |
4079 | gfc_symbol *sym, *proc_if = NULL; | |
4080 | int num; | |
cad0ddcf | 4081 | gfc_expr *initializer = NULL; |
af1a34ee | 4082 | |
4083 | old_loc = entry_loc = gfc_current_locus; | |
4084 | ||
4085 | gfc_clear_ts (¤t_ts); | |
4086 | ||
4087 | if (gfc_match (" (") != MATCH_YES) | |
4088 | { | |
4089 | gfc_current_locus = entry_loc; | |
4090 | return MATCH_NO; | |
4091 | } | |
4092 | ||
4093 | /* Get the type spec. for the procedure interface. */ | |
4094 | old_loc = gfc_current_locus; | |
67a51c8e | 4095 | m = gfc_match_type_spec (¤t_ts, 0); |
fd1277c3 | 4096 | gfc_gobble_whitespace (); |
e0be6f02 | 4097 | if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')')) |
af1a34ee | 4098 | goto got_ts; |
4099 | ||
4100 | if (m == MATCH_ERROR) | |
4101 | return m; | |
4102 | ||
4103 | gfc_current_locus = old_loc; | |
4104 | ||
4105 | /* Get the name of the procedure or abstract interface | |
4106 | to inherit the interface from. */ | |
4107 | m = gfc_match_symbol (&proc_if, 1); | |
4108 | ||
4109 | if (m == MATCH_NO) | |
4110 | goto syntax; | |
4111 | else if (m == MATCH_ERROR) | |
4112 | return m; | |
4113 | ||
4114 | /* Various interface checks. */ | |
4115 | if (proc_if) | |
4116 | { | |
ecb6b17c | 4117 | proc_if->refs++; |
74113644 | 4118 | /* Resolve interface if possible. That way, attr.procedure is only set |
4119 | if it is declared by a later procedure-declaration-stmt, which is | |
4120 | invalid per C1212. */ | |
2cd2bb5c | 4121 | while (proc_if->ts.interface) |
4122 | proc_if = proc_if->ts.interface; | |
74113644 | 4123 | |
af1a34ee | 4124 | if (proc_if->generic) |
4125 | { | |
4126 | gfc_error ("Interface '%s' at %C may not be generic", proc_if->name); | |
4127 | return MATCH_ERROR; | |
4128 | } | |
4129 | if (proc_if->attr.proc == PROC_ST_FUNCTION) | |
4130 | { | |
4131 | gfc_error ("Interface '%s' at %C may not be a statement function", | |
4132 | proc_if->name); | |
4133 | return MATCH_ERROR; | |
4134 | } | |
4135 | /* Handle intrinsic procedures. */ | |
7dff348f | 4136 | if (!(proc_if->attr.external || proc_if->attr.use_assoc |
4137 | || proc_if->attr.if_source == IFSRC_IFBODY) | |
a34926ba | 4138 | && (gfc_is_intrinsic (proc_if, 0, gfc_current_locus) |
4139 | || gfc_is_intrinsic (proc_if, 1, gfc_current_locus))) | |
af1a34ee | 4140 | proc_if->attr.intrinsic = 1; |
4141 | if (proc_if->attr.intrinsic | |
4142 | && !gfc_intrinsic_actual_ok (proc_if->name, 0)) | |
4143 | { | |
4144 | gfc_error ("Intrinsic procedure '%s' not allowed " | |
4145 | "in PROCEDURE statement at %C", proc_if->name); | |
4146 | return MATCH_ERROR; | |
4147 | } | |
af1a34ee | 4148 | } |
4149 | ||
4150 | got_ts: | |
af1a34ee | 4151 | if (gfc_match (" )") != MATCH_YES) |
4152 | { | |
4153 | gfc_current_locus = entry_loc; | |
4154 | return MATCH_NO; | |
4155 | } | |
4156 | ||
4157 | /* Parse attributes. */ | |
4158 | m = match_attr_spec(); | |
4159 | if (m == MATCH_ERROR) | |
4160 | return MATCH_ERROR; | |
4161 | ||
4162 | /* Get procedure symbols. */ | |
4163 | for(num=1;;num++) | |
4164 | { | |
af1a34ee | 4165 | m = gfc_match_symbol (&sym, 0); |
4166 | if (m == MATCH_NO) | |
4167 | goto syntax; | |
4168 | else if (m == MATCH_ERROR) | |
4169 | return m; | |
4170 | ||
4171 | /* Add current_attr to the symbol attributes. */ | |
4172 | if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
4173 | return MATCH_ERROR; | |
4174 | ||
4175 | if (sym->attr.is_bind_c) | |
4176 | { | |
4177 | /* Check for C1218. */ | |
4178 | if (!proc_if || !proc_if->attr.is_bind_c) | |
4179 | { | |
4180 | gfc_error ("BIND(C) attribute at %C requires " | |
4181 | "an interface with BIND(C)"); | |
4182 | return MATCH_ERROR; | |
4183 | } | |
4184 | /* Check for C1217. */ | |
4185 | if (has_name_equals && sym->attr.pointer) | |
4186 | { | |
4187 | gfc_error ("BIND(C) procedure with NAME may not have " | |
4188 | "POINTER attribute at %C"); | |
4189 | return MATCH_ERROR; | |
4190 | } | |
4191 | if (has_name_equals && sym->attr.dummy) | |
4192 | { | |
4193 | gfc_error ("Dummy procedure at %C may not have " | |
4194 | "BIND(C) attribute with NAME"); | |
4195 | return MATCH_ERROR; | |
4196 | } | |
4197 | /* Set binding label for BIND(C). */ | |
4198 | if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS) | |
4199 | return MATCH_ERROR; | |
4200 | } | |
4201 | ||
cad0ddcf | 4202 | if (gfc_add_external (&sym->attr, NULL) == FAILURE) |
af1a34ee | 4203 | return MATCH_ERROR; |
4204 | if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE) | |
4205 | return MATCH_ERROR; | |
4206 | ||
4207 | /* Set interface. */ | |
4208 | if (proc_if != NULL) | |
f7d7a083 | 4209 | { |
13a834aa | 4210 | if (sym->ts.type != BT_UNKNOWN) |
4211 | { | |
4212 | gfc_error ("Procedure '%s' at %L already has basic type of %s", | |
4213 | sym->name, &gfc_current_locus, | |
4214 | gfc_basic_typename (sym->ts.type)); | |
4215 | return MATCH_ERROR; | |
4216 | } | |
2cd2bb5c | 4217 | sym->ts.interface = proc_if; |
f7d7a083 | 4218 | sym->attr.untyped = 1; |
4219 | } | |
af1a34ee | 4220 | else if (current_ts.type != BT_UNKNOWN) |
4221 | { | |
13a834aa | 4222 | if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) |
4223 | return MATCH_ERROR; | |
2cd2bb5c | 4224 | sym->ts.interface = gfc_new_symbol ("", gfc_current_ns); |
4225 | sym->ts.interface->ts = current_ts; | |
4226 | sym->ts.interface->attr.function = 1; | |
4227 | sym->attr.function = sym->ts.interface->attr.function; | |
af1a34ee | 4228 | } |
4229 | ||
cad0ddcf | 4230 | if (gfc_match (" =>") == MATCH_YES) |
4231 | { | |
4232 | if (!current_attr.pointer) | |
4233 | { | |
4234 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
4235 | m = MATCH_ERROR; | |
4236 | goto cleanup; | |
4237 | } | |
4238 | ||
4239 | m = gfc_match_null (&initializer); | |
4240 | if (m == MATCH_NO) | |
4241 | { | |
4242 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4243 | m = MATCH_ERROR; | |
4244 | } | |
4245 | ||
4246 | if (gfc_pure (NULL)) | |
4247 | { | |
4248 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4249 | "a PURE procedure"); | |
4250 | m = MATCH_ERROR; | |
4251 | } | |
4252 | ||
4253 | if (m != MATCH_YES) | |
4254 | goto cleanup; | |
4255 | ||
4256 | if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus) | |
4257 | != SUCCESS) | |
4258 | goto cleanup; | |
4259 | ||
4260 | } | |
4261 | ||
4262 | gfc_set_sym_referenced (sym); | |
4263 | ||
af1a34ee | 4264 | if (gfc_match_eos () == MATCH_YES) |
4265 | return MATCH_YES; | |
4266 | if (gfc_match_char (',') != MATCH_YES) | |
4267 | goto syntax; | |
4268 | } | |
4269 | ||
4270 | syntax: | |
4271 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4272 | return MATCH_ERROR; | |
cad0ddcf | 4273 | |
4274 | cleanup: | |
4275 | /* Free stuff up and return. */ | |
4276 | gfc_free_expr (initializer); | |
4277 | return m; | |
af1a34ee | 4278 | } |
4279 | ||
4280 | ||
4281 | /* Match a PROCEDURE declaration inside an interface (R1206). */ | |
4282 | ||
4283 | static match | |
4284 | match_procedure_in_interface (void) | |
4285 | { | |
4286 | match m; | |
4287 | gfc_symbol *sym; | |
4288 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4289 | ||
4290 | if (current_interface.type == INTERFACE_NAMELESS | |
4291 | || current_interface.type == INTERFACE_ABSTRACT) | |
4292 | { | |
4293 | gfc_error ("PROCEDURE at %C must be in a generic interface"); | |
4294 | return MATCH_ERROR; | |
4295 | } | |
4296 | ||
4297 | for(;;) | |
4298 | { | |
4299 | m = gfc_match_name (name); | |
4300 | if (m == MATCH_NO) | |
4301 | goto syntax; | |
4302 | else if (m == MATCH_ERROR) | |
4303 | return m; | |
4304 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
4305 | return MATCH_ERROR; | |
4306 | ||
4307 | if (gfc_add_interface (sym) == FAILURE) | |
4308 | return MATCH_ERROR; | |
4309 | ||
af1a34ee | 4310 | if (gfc_match_eos () == MATCH_YES) |
4311 | break; | |
4312 | if (gfc_match_char (',') != MATCH_YES) | |
4313 | goto syntax; | |
4314 | } | |
4315 | ||
4316 | return MATCH_YES; | |
4317 | ||
4318 | syntax: | |
4319 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4320 | return MATCH_ERROR; | |
4321 | } | |
4322 | ||
4323 | ||
4324 | /* General matcher for PROCEDURE declarations. */ | |
4325 | ||
7fd88f6e | 4326 | static match match_procedure_in_type (void); |
4327 | ||
af1a34ee | 4328 | match |
4329 | gfc_match_procedure (void) | |
4330 | { | |
4331 | match m; | |
4332 | ||
4333 | switch (gfc_current_state ()) | |
4334 | { | |
4335 | case COMP_NONE: | |
4336 | case COMP_PROGRAM: | |
4337 | case COMP_MODULE: | |
4338 | case COMP_SUBROUTINE: | |
4339 | case COMP_FUNCTION: | |
4340 | m = match_procedure_decl (); | |
4341 | break; | |
4342 | case COMP_INTERFACE: | |
4343 | m = match_procedure_in_interface (); | |
4344 | break; | |
4345 | case COMP_DERIVED: | |
7fd88f6e | 4346 | gfc_error ("Fortran 2003: Procedure components at %C are not yet" |
4347 | " implemented in gfortran"); | |
af1a34ee | 4348 | return MATCH_ERROR; |
7fd88f6e | 4349 | case COMP_DERIVED_CONTAINS: |
4350 | m = match_procedure_in_type (); | |
4351 | break; | |
af1a34ee | 4352 | default: |
4353 | return MATCH_NO; | |
4354 | } | |
4355 | ||
4356 | if (m != MATCH_YES) | |
4357 | return m; | |
4358 | ||
4359 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C") | |
4360 | == FAILURE) | |
4361 | return MATCH_ERROR; | |
4362 | ||
4363 | return m; | |
4364 | } | |
4365 | ||
4366 | ||
a34926ba | 4367 | /* Warn if a matched procedure has the same name as an intrinsic; this is |
4368 | simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current | |
4369 | parser-state-stack to find out whether we're in a module. */ | |
4370 | ||
4371 | static void | |
4372 | warn_intrinsic_shadow (const gfc_symbol* sym, bool func) | |
4373 | { | |
4374 | bool in_module; | |
4375 | ||
4376 | in_module = (gfc_state_stack->previous | |
4377 | && gfc_state_stack->previous->state == COMP_MODULE); | |
4378 | ||
4379 | gfc_warn_intrinsic_shadow (sym, in_module, func); | |
4380 | } | |
4381 | ||
4382 | ||
4ee9c684 | 4383 | /* Match a function declaration. */ |
4384 | ||
4385 | match | |
4386 | gfc_match_function_decl (void) | |
4387 | { | |
4388 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4389 | gfc_symbol *sym, *result; | |
4390 | locus old_loc; | |
4391 | match m; | |
c5d33754 | 4392 | match suffix_match; |
4393 | match found_match; /* Status returned by match func. */ | |
4ee9c684 | 4394 | |
4395 | if (gfc_current_state () != COMP_NONE | |
4396 | && gfc_current_state () != COMP_INTERFACE | |
4397 | && gfc_current_state () != COMP_CONTAINS) | |
4398 | return MATCH_NO; | |
4399 | ||
4400 | gfc_clear_ts (¤t_ts); | |
4401 | ||
cbb9e6aa | 4402 | old_loc = gfc_current_locus; |
4ee9c684 | 4403 | |
077932f9 | 4404 | m = gfc_match_prefix (¤t_ts); |
4ee9c684 | 4405 | if (m != MATCH_YES) |
4406 | { | |
cbb9e6aa | 4407 | gfc_current_locus = old_loc; |
4ee9c684 | 4408 | return m; |
4409 | } | |
4410 | ||
4411 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
4412 | { | |
cbb9e6aa | 4413 | gfc_current_locus = old_loc; |
4ee9c684 | 4414 | return MATCH_NO; |
4415 | } | |
d77f260f | 4416 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 4417 | return MATCH_ERROR; |
4418 | gfc_new_block = sym; | |
4419 | ||
4420 | m = gfc_match_formal_arglist (sym, 0, 0); | |
4421 | if (m == MATCH_NO) | |
9b435b6d | 4422 | { |
4423 | gfc_error ("Expected formal argument list in function " | |
1a9745d2 | 4424 | "definition at %C"); |
9b435b6d | 4425 | m = MATCH_ERROR; |
4426 | goto cleanup; | |
4427 | } | |
4ee9c684 | 4428 | else if (m == MATCH_ERROR) |
4429 | goto cleanup; | |
4430 | ||
4431 | result = NULL; | |
4432 | ||
c5d33754 | 4433 | /* According to the draft, the bind(c) and result clause can |
4434 | come in either order after the formal_arg_list (i.e., either | |
4435 | can be first, both can exist together or by themselves or neither | |
4436 | one). Therefore, the match_result can't match the end of the | |
4437 | string, and check for the bind(c) or result clause in either order. */ | |
4438 | found_match = gfc_match_eos (); | |
4439 | ||
4440 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
4441 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4442 | not allowed for procedures. */ | |
4443 | if (sym->attr.is_bind_c == 1) | |
4444 | { | |
4445 | sym->attr.is_bind_c = 0; | |
4446 | if (sym->old_symbol != NULL) | |
4447 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4448 | "variables or common blocks", | |
4449 | &(sym->old_symbol->declared_at)); | |
4450 | else | |
4451 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4452 | "variables or common blocks", &gfc_current_locus); | |
4ee9c684 | 4453 | } |
4454 | ||
c5d33754 | 4455 | if (found_match != MATCH_YES) |
4ee9c684 | 4456 | { |
c5d33754 | 4457 | /* If we haven't found the end-of-statement, look for a suffix. */ |
4458 | suffix_match = gfc_match_suffix (sym, &result); | |
4459 | if (suffix_match == MATCH_YES) | |
4460 | /* Need to get the eos now. */ | |
4461 | found_match = gfc_match_eos (); | |
4462 | else | |
4463 | found_match = suffix_match; | |
4ee9c684 | 4464 | } |
4465 | ||
c5d33754 | 4466 | if(found_match != MATCH_YES) |
4467 | m = MATCH_ERROR; | |
4ee9c684 | 4468 | else |
4469 | { | |
c5d33754 | 4470 | /* Make changes to the symbol. */ |
4471 | m = MATCH_ERROR; | |
4472 | ||
4473 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) | |
4474 | goto cleanup; | |
4475 | ||
4476 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
4477 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4478 | goto cleanup; | |
4ee9c684 | 4479 | |
c5d33754 | 4480 | if (current_ts.type != BT_UNKNOWN && sym->ts.type != BT_UNKNOWN |
4481 | && !sym->attr.implicit_type) | |
4482 | { | |
4483 | gfc_error ("Function '%s' at %C already has a type of %s", name, | |
4484 | gfc_basic_typename (sym->ts.type)); | |
4485 | goto cleanup; | |
4486 | } | |
4487 | ||
8d39570e | 4488 | /* Delay matching the function characteristics until after the |
077932f9 | 4489 | specification block by signalling kind=-1. */ |
8d39570e | 4490 | sym->declared_at = old_loc; |
4491 | if (current_ts.type != BT_UNKNOWN) | |
4492 | current_ts.kind = -1; | |
4493 | else | |
4494 | current_ts.kind = 0; | |
077932f9 | 4495 | |
c5d33754 | 4496 | if (result == NULL) |
4497 | { | |
4498 | sym->ts = current_ts; | |
4499 | sym->result = sym; | |
4500 | } | |
4501 | else | |
4502 | { | |
4503 | result->ts = current_ts; | |
4504 | sym->result = result; | |
4505 | } | |
4506 | ||
a34926ba | 4507 | /* Warn if this procedure has the same name as an intrinsic. */ |
4508 | warn_intrinsic_shadow (sym, true); | |
4509 | ||
c5d33754 | 4510 | return MATCH_YES; |
4511 | } | |
4ee9c684 | 4512 | |
4513 | cleanup: | |
cbb9e6aa | 4514 | gfc_current_locus = old_loc; |
4ee9c684 | 4515 | return m; |
4516 | } | |
4517 | ||
1a9745d2 | 4518 | |
4519 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
4520 | pass the name of the entry, rather than the gfc_current_block name, and | |
4521 | to return false upon finding an existing global entry. */ | |
858f9894 | 4522 | |
4523 | static bool | |
1a9745d2 | 4524 | add_global_entry (const char *name, int sub) |
858f9894 | 4525 | { |
4526 | gfc_gsymbol *s; | |
15d92c0c | 4527 | unsigned int type; |
858f9894 | 4528 | |
4529 | s = gfc_get_gsymbol(name); | |
5b11d932 | 4530 | type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; |
858f9894 | 4531 | |
4532 | if (s->defined | |
1a9745d2 | 4533 | || (s->type != GSYM_UNKNOWN |
5b11d932 | 4534 | && s->type != type)) |
cbbac028 | 4535 | gfc_global_used(s, NULL); |
858f9894 | 4536 | else |
4537 | { | |
5b11d932 | 4538 | s->type = type; |
858f9894 | 4539 | s->where = gfc_current_locus; |
4540 | s->defined = 1; | |
83aeedb9 | 4541 | s->ns = gfc_current_ns; |
858f9894 | 4542 | return true; |
4543 | } | |
4544 | return false; | |
4545 | } | |
4ee9c684 | 4546 | |
1a9745d2 | 4547 | |
4ee9c684 | 4548 | /* Match an ENTRY statement. */ |
4549 | ||
4550 | match | |
4551 | gfc_match_entry (void) | |
4552 | { | |
1b716045 | 4553 | gfc_symbol *proc; |
4554 | gfc_symbol *result; | |
4555 | gfc_symbol *entry; | |
4ee9c684 | 4556 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
4557 | gfc_compile_state state; | |
4558 | match m; | |
1b716045 | 4559 | gfc_entry_list *el; |
7b5e1acc | 4560 | locus old_loc; |
d77f260f | 4561 | bool module_procedure; |
86f0974b | 4562 | char peek_char; |
4563 | match is_bind_c; | |
4ee9c684 | 4564 | |
4565 | m = gfc_match_name (name); | |
4566 | if (m != MATCH_YES) | |
4567 | return m; | |
4568 | ||
1b716045 | 4569 | state = gfc_current_state (); |
ea37f786 | 4570 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
1b716045 | 4571 | { |
ea37f786 | 4572 | switch (state) |
4573 | { | |
4574 | case COMP_PROGRAM: | |
4575 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
4576 | break; | |
4577 | case COMP_MODULE: | |
4578 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
4579 | break; | |
4580 | case COMP_BLOCK_DATA: | |
1a9745d2 | 4581 | gfc_error ("ENTRY statement at %C cannot appear within " |
4582 | "a BLOCK DATA"); | |
ea37f786 | 4583 | break; |
4584 | case COMP_INTERFACE: | |
1a9745d2 | 4585 | gfc_error ("ENTRY statement at %C cannot appear within " |
4586 | "an INTERFACE"); | |
ea37f786 | 4587 | break; |
4588 | case COMP_DERIVED: | |
1a9745d2 | 4589 | gfc_error ("ENTRY statement at %C cannot appear within " |
4590 | "a DERIVED TYPE block"); | |
ea37f786 | 4591 | break; |
4592 | case COMP_IF: | |
1a9745d2 | 4593 | gfc_error ("ENTRY statement at %C cannot appear within " |
4594 | "an IF-THEN block"); | |
ea37f786 | 4595 | break; |
4596 | case COMP_DO: | |
1a9745d2 | 4597 | gfc_error ("ENTRY statement at %C cannot appear within " |
4598 | "a DO block"); | |
ea37f786 | 4599 | break; |
4600 | case COMP_SELECT: | |
1a9745d2 | 4601 | gfc_error ("ENTRY statement at %C cannot appear within " |
4602 | "a SELECT block"); | |
ea37f786 | 4603 | break; |
4604 | case COMP_FORALL: | |
1a9745d2 | 4605 | gfc_error ("ENTRY statement at %C cannot appear within " |
4606 | "a FORALL block"); | |
ea37f786 | 4607 | break; |
4608 | case COMP_WHERE: | |
1a9745d2 | 4609 | gfc_error ("ENTRY statement at %C cannot appear within " |
4610 | "a WHERE block"); | |
ea37f786 | 4611 | break; |
4612 | case COMP_CONTAINS: | |
1a9745d2 | 4613 | gfc_error ("ENTRY statement at %C cannot appear within " |
4614 | "a contained subprogram"); | |
ea37f786 | 4615 | break; |
4616 | default: | |
4617 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
4618 | } | |
1b716045 | 4619 | return MATCH_ERROR; |
4620 | } | |
4621 | ||
d77f260f | 4622 | module_procedure = gfc_current_ns->parent != NULL |
1a9745d2 | 4623 | && gfc_current_ns->parent->proc_name |
4624 | && gfc_current_ns->parent->proc_name->attr.flavor | |
4625 | == FL_MODULE; | |
d77f260f | 4626 | |
1b716045 | 4627 | if (gfc_current_ns->parent != NULL |
4628 | && gfc_current_ns->parent->proc_name | |
d77f260f | 4629 | && !module_procedure) |
1b716045 | 4630 | { |
4631 | gfc_error("ENTRY statement at %C cannot appear in a " | |
4632 | "contained procedure"); | |
4633 | return MATCH_ERROR; | |
4634 | } | |
4635 | ||
d77f260f | 4636 | /* Module function entries need special care in get_proc_name |
4637 | because previous references within the function will have | |
4638 | created symbols attached to the current namespace. */ | |
4639 | if (get_proc_name (name, &entry, | |
4640 | gfc_current_ns->parent != NULL | |
c1e4695a | 4641 | && module_procedure)) |
4ee9c684 | 4642 | return MATCH_ERROR; |
4643 | ||
1b716045 | 4644 | proc = gfc_current_block (); |
4645 | ||
86f0974b | 4646 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
4647 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4648 | not allowed for procedures. */ | |
4649 | if (entry->attr.is_bind_c == 1) | |
4650 | { | |
4651 | entry->attr.is_bind_c = 0; | |
4652 | if (entry->old_symbol != NULL) | |
4653 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4654 | "variables or common blocks", | |
4655 | &(entry->old_symbol->declared_at)); | |
4656 | else | |
4657 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4658 | "variables or common blocks", &gfc_current_locus); | |
4659 | } | |
4660 | ||
4661 | /* Check what next non-whitespace character is so we can tell if there | |
4662 | is the required parens if we have a BIND(C). */ | |
4663 | gfc_gobble_whitespace (); | |
e0be6f02 | 4664 | peek_char = gfc_peek_ascii_char (); |
86f0974b | 4665 | |
1b716045 | 4666 | if (state == COMP_SUBROUTINE) |
4ee9c684 | 4667 | { |
950683ed | 4668 | /* An entry in a subroutine. */ |
8cafc742 | 4669 | if (!gfc_current_ns->parent && !add_global_entry (name, 1)) |
858f9894 | 4670 | return MATCH_ERROR; |
4671 | ||
4ee9c684 | 4672 | m = gfc_match_formal_arglist (entry, 0, 1); |
4673 | if (m != MATCH_YES) | |
4674 | return MATCH_ERROR; | |
4675 | ||
75ae7f6c | 4676 | /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can |
4677 | never be an internal procedure. */ | |
4678 | is_bind_c = gfc_match_bind_c (entry, true); | |
86f0974b | 4679 | if (is_bind_c == MATCH_ERROR) |
4680 | return MATCH_ERROR; | |
4681 | if (is_bind_c == MATCH_YES) | |
4682 | { | |
4683 | if (peek_char != '(') | |
4684 | { | |
4685 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
4686 | return MATCH_ERROR; | |
4687 | } | |
4688 | if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1) | |
4689 | == FAILURE) | |
4690 | return MATCH_ERROR; | |
4691 | } | |
4692 | ||
950683ed | 4693 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4694 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 4695 | return MATCH_ERROR; |
1b716045 | 4696 | } |
4697 | else | |
4698 | { | |
7b5e1acc | 4699 | /* An entry in a function. |
1a9745d2 | 4700 | We need to take special care because writing |
4701 | ENTRY f() | |
4702 | as | |
4703 | ENTRY f | |
4704 | is allowed, whereas | |
4705 | ENTRY f() RESULT (r) | |
4706 | can't be written as | |
4707 | ENTRY f RESULT (r). */ | |
8cafc742 | 4708 | if (!gfc_current_ns->parent && !add_global_entry (name, 0)) |
858f9894 | 4709 | return MATCH_ERROR; |
4710 | ||
7b5e1acc | 4711 | old_loc = gfc_current_locus; |
4712 | if (gfc_match_eos () == MATCH_YES) | |
4713 | { | |
4714 | gfc_current_locus = old_loc; | |
4715 | /* Match the empty argument list, and add the interface to | |
4716 | the symbol. */ | |
4717 | m = gfc_match_formal_arglist (entry, 0, 1); | |
4718 | } | |
4719 | else | |
4720 | m = gfc_match_formal_arglist (entry, 0, 0); | |
4721 | ||
4ee9c684 | 4722 | if (m != MATCH_YES) |
4723 | return MATCH_ERROR; | |
4724 | ||
4ee9c684 | 4725 | result = NULL; |
4726 | ||
4727 | if (gfc_match_eos () == MATCH_YES) | |
4728 | { | |
950683ed | 4729 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4730 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 4731 | return MATCH_ERROR; |
4732 | ||
c6871095 | 4733 | entry->result = entry; |
4ee9c684 | 4734 | } |
4735 | else | |
4736 | { | |
86f0974b | 4737 | m = gfc_match_suffix (entry, &result); |
4ee9c684 | 4738 | if (m == MATCH_NO) |
4739 | gfc_syntax_error (ST_ENTRY); | |
4740 | if (m != MATCH_YES) | |
4741 | return MATCH_ERROR; | |
4742 | ||
86f0974b | 4743 | if (result) |
4744 | { | |
4745 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE | |
4746 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
4747 | || gfc_add_function (&entry->attr, result->name, NULL) | |
4748 | == FAILURE) | |
4749 | return MATCH_ERROR; | |
4750 | entry->result = result; | |
4751 | } | |
4752 | else | |
4753 | { | |
4754 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE | |
4755 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
4756 | return MATCH_ERROR; | |
4757 | entry->result = entry; | |
4758 | } | |
4ee9c684 | 4759 | } |
4ee9c684 | 4760 | } |
4761 | ||
4762 | if (gfc_match_eos () != MATCH_YES) | |
4763 | { | |
4764 | gfc_syntax_error (ST_ENTRY); | |
4765 | return MATCH_ERROR; | |
4766 | } | |
4767 | ||
1b716045 | 4768 | entry->attr.recursive = proc->attr.recursive; |
4769 | entry->attr.elemental = proc->attr.elemental; | |
4770 | entry->attr.pure = proc->attr.pure; | |
4ee9c684 | 4771 | |
1b716045 | 4772 | el = gfc_get_entry_list (); |
4773 | el->sym = entry; | |
4774 | el->next = gfc_current_ns->entries; | |
4775 | gfc_current_ns->entries = el; | |
4776 | if (el->next) | |
4777 | el->id = el->next->id + 1; | |
4778 | else | |
4779 | el->id = 1; | |
4ee9c684 | 4780 | |
1b716045 | 4781 | new_st.op = EXEC_ENTRY; |
4782 | new_st.ext.entry = el; | |
4783 | ||
4784 | return MATCH_YES; | |
4ee9c684 | 4785 | } |
4786 | ||
4787 | ||
4788 | /* Match a subroutine statement, including optional prefixes. */ | |
4789 | ||
4790 | match | |
4791 | gfc_match_subroutine (void) | |
4792 | { | |
4793 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4794 | gfc_symbol *sym; | |
4795 | match m; | |
c5d33754 | 4796 | match is_bind_c; |
4797 | char peek_char; | |
75ae7f6c | 4798 | bool allow_binding_name; |
4ee9c684 | 4799 | |
4800 | if (gfc_current_state () != COMP_NONE | |
4801 | && gfc_current_state () != COMP_INTERFACE | |
4802 | && gfc_current_state () != COMP_CONTAINS) | |
4803 | return MATCH_NO; | |
4804 | ||
077932f9 | 4805 | m = gfc_match_prefix (NULL); |
4ee9c684 | 4806 | if (m != MATCH_YES) |
4807 | return m; | |
4808 | ||
4809 | m = gfc_match ("subroutine% %n", name); | |
4810 | if (m != MATCH_YES) | |
4811 | return m; | |
4812 | ||
d77f260f | 4813 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 4814 | return MATCH_ERROR; |
4815 | gfc_new_block = sym; | |
4816 | ||
c5d33754 | 4817 | /* Check what next non-whitespace character is so we can tell if there |
86f0974b | 4818 | is the required parens if we have a BIND(C). */ |
c5d33754 | 4819 | gfc_gobble_whitespace (); |
e0be6f02 | 4820 | peek_char = gfc_peek_ascii_char (); |
c5d33754 | 4821 | |
950683ed | 4822 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
4ee9c684 | 4823 | return MATCH_ERROR; |
4824 | ||
4825 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
4826 | return MATCH_ERROR; | |
4827 | ||
c5d33754 | 4828 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
4829 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4830 | not allowed for procedures. */ | |
4831 | if (sym->attr.is_bind_c == 1) | |
4832 | { | |
4833 | sym->attr.is_bind_c = 0; | |
4834 | if (sym->old_symbol != NULL) | |
4835 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4836 | "variables or common blocks", | |
4837 | &(sym->old_symbol->declared_at)); | |
4838 | else | |
4839 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4840 | "variables or common blocks", &gfc_current_locus); | |
4841 | } | |
75ae7f6c | 4842 | |
4843 | /* C binding names are not allowed for internal procedures. */ | |
4844 | if (gfc_current_state () == COMP_CONTAINS | |
4845 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
4846 | allow_binding_name = false; | |
4847 | else | |
4848 | allow_binding_name = true; | |
4849 | ||
c5d33754 | 4850 | /* Here, we are just checking if it has the bind(c) attribute, and if |
4851 | so, then we need to make sure it's all correct. If it doesn't, | |
4852 | we still need to continue matching the rest of the subroutine line. */ | |
75ae7f6c | 4853 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 4854 | if (is_bind_c == MATCH_ERROR) |
4855 | { | |
4856 | /* There was an attempt at the bind(c), but it was wrong. An | |
4857 | error message should have been printed w/in the gfc_match_bind_c | |
4858 | so here we'll just return the MATCH_ERROR. */ | |
4859 | return MATCH_ERROR; | |
4860 | } | |
4861 | ||
4862 | if (is_bind_c == MATCH_YES) | |
4863 | { | |
75ae7f6c | 4864 | /* The following is allowed in the Fortran 2008 draft. */ |
4518e961 | 4865 | if (gfc_current_state () == COMP_CONTAINS |
75ae7f6c | 4866 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
2dcae6c7 | 4867 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
4868 | "at %L may not be specified for an internal " | |
4869 | "procedure", &gfc_current_locus) | |
75ae7f6c | 4870 | == FAILURE) |
4871 | return MATCH_ERROR; | |
4872 | ||
c5d33754 | 4873 | if (peek_char != '(') |
4874 | { | |
4875 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
4876 | return MATCH_ERROR; | |
4877 | } | |
4878 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) | |
4879 | == FAILURE) | |
4880 | return MATCH_ERROR; | |
4881 | } | |
4882 | ||
4ee9c684 | 4883 | if (gfc_match_eos () != MATCH_YES) |
4884 | { | |
4885 | gfc_syntax_error (ST_SUBROUTINE); | |
4886 | return MATCH_ERROR; | |
4887 | } | |
4888 | ||
4889 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4890 | return MATCH_ERROR; | |
4891 | ||
a34926ba | 4892 | /* Warn if it has the same name as an intrinsic. */ |
4893 | warn_intrinsic_shadow (sym, false); | |
4894 | ||
4ee9c684 | 4895 | return MATCH_YES; |
4896 | } | |
4897 | ||
4898 | ||
c5d33754 | 4899 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
4900 | given, and set the binding label in either the given symbol (if not | |
a0527218 | 4901 | NULL), or in the current_ts. The symbol may be NULL because we may |
c5d33754 | 4902 | encounter the BIND(C) before the declaration itself. Return |
4903 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, | |
4904 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, | |
4905 | or MATCH_YES if the specifier was correct and the binding label and | |
4906 | bind(c) fields were set correctly for the given symbol or the | |
75ae7f6c | 4907 | current_ts. If allow_binding_name is false, no binding name may be |
4908 | given. */ | |
c5d33754 | 4909 | |
4910 | match | |
75ae7f6c | 4911 | gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name) |
c5d33754 | 4912 | { |
4913 | /* binding label, if exists */ | |
4914 | char binding_label[GFC_MAX_SYMBOL_LEN + 1]; | |
4915 | match double_quote; | |
4916 | match single_quote; | |
c5d33754 | 4917 | |
4918 | /* Initialize the flag that specifies whether we encountered a NAME= | |
4919 | specifier or not. */ | |
4920 | has_name_equals = 0; | |
4921 | ||
4922 | /* Init the first char to nil so we can catch if we don't have | |
4923 | the label (name attr) or the symbol name yet. */ | |
4924 | binding_label[0] = '\0'; | |
4925 | ||
4926 | /* This much we have to be able to match, in this order, if | |
4927 | there is a bind(c) label. */ | |
4928 | if (gfc_match (" bind ( c ") != MATCH_YES) | |
4929 | return MATCH_NO; | |
4930 | ||
4931 | /* Now see if there is a binding label, or if we've reached the | |
4932 | end of the bind(c) attribute without one. */ | |
4933 | if (gfc_match_char (',') == MATCH_YES) | |
4934 | { | |
4935 | if (gfc_match (" name = ") != MATCH_YES) | |
4936 | { | |
4937 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
4938 | "at %C"); | |
4939 | /* should give an error message here */ | |
4940 | return MATCH_ERROR; | |
4941 | } | |
4942 | ||
4943 | has_name_equals = 1; | |
4944 | ||
4945 | /* Get the opening quote. */ | |
4946 | double_quote = MATCH_YES; | |
4947 | single_quote = MATCH_YES; | |
4948 | double_quote = gfc_match_char ('"'); | |
4949 | if (double_quote != MATCH_YES) | |
4950 | single_quote = gfc_match_char ('\''); | |
4951 | if (double_quote != MATCH_YES && single_quote != MATCH_YES) | |
4952 | { | |
4953 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
4954 | "at %C"); | |
4955 | return MATCH_ERROR; | |
4956 | } | |
4957 | ||
4958 | /* Grab the binding label, using functions that will not lower | |
4959 | case the names automatically. */ | |
4960 | if (gfc_match_name_C (binding_label) != MATCH_YES) | |
4961 | return MATCH_ERROR; | |
4962 | ||
4963 | /* Get the closing quotation. */ | |
4964 | if (double_quote == MATCH_YES) | |
4965 | { | |
4966 | if (gfc_match_char ('"') != MATCH_YES) | |
4967 | { | |
4968 | gfc_error ("Missing closing quote '\"' for binding label at %C"); | |
4969 | /* User started string with '"' so looked to match it. */ | |
4970 | return MATCH_ERROR; | |
4971 | } | |
4972 | } | |
4973 | else | |
4974 | { | |
4975 | if (gfc_match_char ('\'') != MATCH_YES) | |
4976 | { | |
4977 | gfc_error ("Missing closing quote '\'' for binding label at %C"); | |
4978 | /* User started string with "'" char. */ | |
4979 | return MATCH_ERROR; | |
4980 | } | |
4981 | } | |
4982 | } | |
4983 | ||
4984 | /* Get the required right paren. */ | |
4985 | if (gfc_match_char (')') != MATCH_YES) | |
4986 | { | |
4987 | gfc_error ("Missing closing paren for binding label at %C"); | |
4988 | return MATCH_ERROR; | |
4989 | } | |
4990 | ||
75ae7f6c | 4991 | if (has_name_equals && !allow_binding_name) |
4992 | { | |
4993 | gfc_error ("No binding name is allowed in BIND(C) at %C"); | |
4994 | return MATCH_ERROR; | |
4995 | } | |
4996 | ||
4997 | if (has_name_equals && sym != NULL && sym->attr.dummy) | |
4998 | { | |
4999 | gfc_error ("For dummy procedure %s, no binding name is " | |
5000 | "allowed in BIND(C) at %C", sym->name); | |
5001 | return MATCH_ERROR; | |
5002 | } | |
5003 | ||
5004 | ||
c5d33754 | 5005 | /* Save the binding label to the symbol. If sym is null, we're |
5006 | probably matching the typespec attributes of a declaration and | |
5007 | haven't gotten the name yet, and therefore, no symbol yet. */ | |
5008 | if (binding_label[0] != '\0') | |
5009 | { | |
5010 | if (sym != NULL) | |
5011 | { | |
b1223b39 | 5012 | strcpy (sym->binding_label, binding_label); |
c5d33754 | 5013 | } |
5014 | else | |
b1223b39 | 5015 | strcpy (curr_binding_label, binding_label); |
c5d33754 | 5016 | } |
75ae7f6c | 5017 | else if (allow_binding_name) |
c5d33754 | 5018 | { |
5019 | /* No binding label, but if symbol isn't null, we | |
75ae7f6c | 5020 | can set the label for it here. |
5021 | If name="" or allow_binding_name is false, no C binding name is | |
5022 | created. */ | |
c5d33754 | 5023 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) |
5024 | strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1); | |
5025 | } | |
94fa7146 | 5026 | |
5cf92482 | 5027 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
5028 | && current_interface.type == INTERFACE_ABSTRACT) | |
94fa7146 | 5029 | { |
5030 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); | |
5031 | return MATCH_ERROR; | |
5032 | } | |
5033 | ||
c5d33754 | 5034 | return MATCH_YES; |
5035 | } | |
5036 | ||
5037 | ||
231e961a | 5038 | /* Return nonzero if we're currently compiling a contained procedure. */ |
c0985832 | 5039 | |
5040 | static int | |
5041 | contained_procedure (void) | |
5042 | { | |
1c343287 | 5043 | gfc_state_data *s = gfc_state_stack; |
c0985832 | 5044 | |
1c343287 | 5045 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) |
5046 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) | |
5047 | return 1; | |
c0985832 | 5048 | |
5049 | return 0; | |
5050 | } | |
5051 | ||
e14bee04 | 5052 | /* Set the kind of each enumerator. The kind is selected such that it is |
3b6a4b41 | 5053 | interoperable with the corresponding C enumeration type, making |
5054 | sure that -fshort-enums is honored. */ | |
5055 | ||
5056 | static void | |
5057 | set_enum_kind(void) | |
5058 | { | |
5059 | enumerator_history *current_history = NULL; | |
5060 | int kind; | |
5061 | int i; | |
5062 | ||
5063 | if (max_enum == NULL || enum_history == NULL) | |
5064 | return; | |
5065 | ||
5066 | if (!gfc_option.fshort_enums) | |
e14bee04 | 5067 | return; |
5068 | ||
3b6a4b41 | 5069 | i = 0; |
5070 | do | |
5071 | { | |
5072 | kind = gfc_integer_kinds[i++].kind; | |
5073 | } | |
e14bee04 | 5074 | while (kind < gfc_c_int_kind |
3b6a4b41 | 5075 | && gfc_check_integer_range (max_enum->initializer->value.integer, |
5076 | kind) != ARITH_OK); | |
5077 | ||
5078 | current_history = enum_history; | |
5079 | while (current_history != NULL) | |
5080 | { | |
5081 | current_history->sym->ts.kind = kind; | |
5082 | current_history = current_history->next; | |
5083 | } | |
5084 | } | |
5085 | ||
1a9745d2 | 5086 | |
4ee9c684 | 5087 | /* Match any of the various end-block statements. Returns the type of |
5088 | END to the caller. The END INTERFACE, END IF, END DO and END | |
5089 | SELECT statements cannot be replaced by a single END statement. */ | |
5090 | ||
5091 | match | |
1a9745d2 | 5092 | gfc_match_end (gfc_statement *st) |
4ee9c684 | 5093 | { |
5094 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5095 | gfc_compile_state state; | |
5096 | locus old_loc; | |
5097 | const char *block_name; | |
5098 | const char *target; | |
c0985832 | 5099 | int eos_ok; |
4ee9c684 | 5100 | match m; |
5101 | ||
cbb9e6aa | 5102 | old_loc = gfc_current_locus; |
4ee9c684 | 5103 | if (gfc_match ("end") != MATCH_YES) |
5104 | return MATCH_NO; | |
5105 | ||
5106 | state = gfc_current_state (); | |
1a9745d2 | 5107 | block_name = gfc_current_block () == NULL |
5108 | ? NULL : gfc_current_block ()->name; | |
4ee9c684 | 5109 | |
7fd88f6e | 5110 | if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS) |
4ee9c684 | 5111 | { |
5112 | state = gfc_state_stack->previous->state; | |
1a9745d2 | 5113 | block_name = gfc_state_stack->previous->sym == NULL |
5114 | ? NULL : gfc_state_stack->previous->sym->name; | |
4ee9c684 | 5115 | } |
5116 | ||
5117 | switch (state) | |
5118 | { | |
5119 | case COMP_NONE: | |
5120 | case COMP_PROGRAM: | |
5121 | *st = ST_END_PROGRAM; | |
5122 | target = " program"; | |
c0985832 | 5123 | eos_ok = 1; |
4ee9c684 | 5124 | break; |
5125 | ||
5126 | case COMP_SUBROUTINE: | |
5127 | *st = ST_END_SUBROUTINE; | |
5128 | target = " subroutine"; | |
c0985832 | 5129 | eos_ok = !contained_procedure (); |
4ee9c684 | 5130 | break; |
5131 | ||
5132 | case COMP_FUNCTION: | |
5133 | *st = ST_END_FUNCTION; | |
5134 | target = " function"; | |
c0985832 | 5135 | eos_ok = !contained_procedure (); |
4ee9c684 | 5136 | break; |
5137 | ||
5138 | case COMP_BLOCK_DATA: | |
5139 | *st = ST_END_BLOCK_DATA; | |
5140 | target = " block data"; | |
c0985832 | 5141 | eos_ok = 1; |
4ee9c684 | 5142 | break; |
5143 | ||
5144 | case COMP_MODULE: | |
5145 | *st = ST_END_MODULE; | |
5146 | target = " module"; | |
c0985832 | 5147 | eos_ok = 1; |
4ee9c684 | 5148 | break; |
5149 | ||
5150 | case COMP_INTERFACE: | |
5151 | *st = ST_END_INTERFACE; | |
5152 | target = " interface"; | |
c0985832 | 5153 | eos_ok = 0; |
4ee9c684 | 5154 | break; |
5155 | ||
5156 | case COMP_DERIVED: | |
7fd88f6e | 5157 | case COMP_DERIVED_CONTAINS: |
4ee9c684 | 5158 | *st = ST_END_TYPE; |
5159 | target = " type"; | |
c0985832 | 5160 | eos_ok = 0; |
4ee9c684 | 5161 | break; |
5162 | ||
5163 | case COMP_IF: | |
5164 | *st = ST_ENDIF; | |
5165 | target = " if"; | |
c0985832 | 5166 | eos_ok = 0; |
4ee9c684 | 5167 | break; |
5168 | ||
5169 | case COMP_DO: | |
5170 | *st = ST_ENDDO; | |
5171 | target = " do"; | |
c0985832 | 5172 | eos_ok = 0; |
4ee9c684 | 5173 | break; |
5174 | ||
5175 | case COMP_SELECT: | |
5176 | *st = ST_END_SELECT; | |
5177 | target = " select"; | |
c0985832 | 5178 | eos_ok = 0; |
4ee9c684 | 5179 | break; |
5180 | ||
5181 | case COMP_FORALL: | |
5182 | *st = ST_END_FORALL; | |
5183 | target = " forall"; | |
c0985832 | 5184 | eos_ok = 0; |
4ee9c684 | 5185 | break; |
5186 | ||
5187 | case COMP_WHERE: | |
5188 | *st = ST_END_WHERE; | |
5189 | target = " where"; | |
c0985832 | 5190 | eos_ok = 0; |
4ee9c684 | 5191 | break; |
5192 | ||
3b6a4b41 | 5193 | case COMP_ENUM: |
5194 | *st = ST_END_ENUM; | |
5195 | target = " enum"; | |
5196 | eos_ok = 0; | |
5197 | last_initializer = NULL; | |
5198 | set_enum_kind (); | |
5199 | gfc_free_enum_history (); | |
5200 | break; | |
5201 | ||
4ee9c684 | 5202 | default: |
5203 | gfc_error ("Unexpected END statement at %C"); | |
5204 | goto cleanup; | |
5205 | } | |
5206 | ||
5207 | if (gfc_match_eos () == MATCH_YES) | |
5208 | { | |
c0985832 | 5209 | if (!eos_ok) |
4ee9c684 | 5210 | { |
f6d0e37a | 5211 | /* We would have required END [something]. */ |
d197c9ee | 5212 | gfc_error ("%s statement expected at %L", |
5213 | gfc_ascii_statement (*st), &old_loc); | |
4ee9c684 | 5214 | goto cleanup; |
5215 | } | |
5216 | ||
5217 | return MATCH_YES; | |
5218 | } | |
5219 | ||
5220 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
5221 | if (gfc_match (target) != MATCH_YES) | |
5222 | { | |
5223 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
5224 | goto cleanup; | |
5225 | } | |
5226 | ||
5227 | /* If we're at the end, make sure a block name wasn't required. */ | |
5228 | if (gfc_match_eos () == MATCH_YES) | |
5229 | { | |
5230 | ||
0d0ce415 | 5231 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT |
5232 | && *st != ST_END_FORALL && *st != ST_END_WHERE) | |
4ee9c684 | 5233 | return MATCH_YES; |
5234 | ||
5235 | if (gfc_current_block () == NULL) | |
5236 | return MATCH_YES; | |
5237 | ||
5238 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
5239 | block_name, gfc_ascii_statement (*st)); | |
5240 | ||
5241 | return MATCH_ERROR; | |
5242 | } | |
5243 | ||
5244 | /* END INTERFACE has a special handler for its several possible endings. */ | |
5245 | if (*st == ST_END_INTERFACE) | |
5246 | return gfc_match_end_interface (); | |
5247 | ||
f6d0e37a | 5248 | /* We haven't hit the end of statement, so what is left must be an |
5249 | end-name. */ | |
4ee9c684 | 5250 | m = gfc_match_space (); |
5251 | if (m == MATCH_YES) | |
5252 | m = gfc_match_name (name); | |
5253 | ||
5254 | if (m == MATCH_NO) | |
5255 | gfc_error ("Expected terminating name at %C"); | |
5256 | if (m != MATCH_YES) | |
5257 | goto cleanup; | |
5258 | ||
5259 | if (block_name == NULL) | |
5260 | goto syntax; | |
5261 | ||
5262 | if (strcmp (name, block_name) != 0) | |
5263 | { | |
5264 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
5265 | gfc_ascii_statement (*st)); | |
5266 | goto cleanup; | |
5267 | } | |
5268 | ||
5269 | if (gfc_match_eos () == MATCH_YES) | |
5270 | return MATCH_YES; | |
5271 | ||
5272 | syntax: | |
5273 | gfc_syntax_error (*st); | |
5274 | ||
5275 | cleanup: | |
cbb9e6aa | 5276 | gfc_current_locus = old_loc; |
4ee9c684 | 5277 | return MATCH_ERROR; |
5278 | } | |
5279 | ||
5280 | ||
5281 | ||
5282 | /***************** Attribute declaration statements ****************/ | |
5283 | ||
5284 | /* Set the attribute of a single variable. */ | |
5285 | ||
5286 | static match | |
5287 | attr_decl1 (void) | |
5288 | { | |
5289 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5290 | gfc_array_spec *as; | |
5291 | gfc_symbol *sym; | |
5292 | locus var_locus; | |
5293 | match m; | |
5294 | ||
5295 | as = NULL; | |
5296 | ||
5297 | m = gfc_match_name (name); | |
5298 | if (m != MATCH_YES) | |
5299 | goto cleanup; | |
5300 | ||
5301 | if (find_special (name, &sym)) | |
5302 | return MATCH_ERROR; | |
5303 | ||
cbb9e6aa | 5304 | var_locus = gfc_current_locus; |
4ee9c684 | 5305 | |
5306 | /* Deal with possible array specification for certain attributes. */ | |
5307 | if (current_attr.dimension | |
5308 | || current_attr.allocatable | |
5309 | || current_attr.pointer | |
5310 | || current_attr.target) | |
5311 | { | |
5312 | m = gfc_match_array_spec (&as); | |
5313 | if (m == MATCH_ERROR) | |
5314 | goto cleanup; | |
5315 | ||
5316 | if (current_attr.dimension && m == MATCH_NO) | |
5317 | { | |
1a9745d2 | 5318 | gfc_error ("Missing array specification at %L in DIMENSION " |
5319 | "statement", &var_locus); | |
4ee9c684 | 5320 | m = MATCH_ERROR; |
5321 | goto cleanup; | |
5322 | } | |
5323 | ||
13aebeb0 | 5324 | if (current_attr.dimension && sym->value) |
5325 | { | |
5326 | gfc_error ("Dimensions specified for %s at %L after its " | |
5327 | "initialisation", sym->name, &var_locus); | |
5328 | m = MATCH_ERROR; | |
5329 | goto cleanup; | |
5330 | } | |
5331 | ||
4ee9c684 | 5332 | if ((current_attr.allocatable || current_attr.pointer) |
5333 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
5334 | { | |
1a9745d2 | 5335 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
4ee9c684 | 5336 | m = MATCH_ERROR; |
5337 | goto cleanup; | |
5338 | } | |
5339 | } | |
5340 | ||
1a9745d2 | 5341 | /* Update symbol table. DIMENSION attribute is set |
5342 | in gfc_set_array_spec(). */ | |
4ee9c684 | 5343 | if (current_attr.dimension == 0 |
63986dfb | 5344 | && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE) |
4ee9c684 | 5345 | { |
5346 | m = MATCH_ERROR; | |
5347 | goto cleanup; | |
5348 | } | |
5349 | ||
5350 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
5351 | { | |
5352 | m = MATCH_ERROR; | |
5353 | goto cleanup; | |
5354 | } | |
e14bee04 | 5355 | |
b549d2a5 | 5356 | if (sym->attr.cray_pointee && sym->as != NULL) |
5357 | { | |
5358 | /* Fix the array spec. */ | |
5359 | m = gfc_mod_pointee_as (sym->as); | |
5360 | if (m == MATCH_ERROR) | |
5361 | goto cleanup; | |
5362 | } | |
4ee9c684 | 5363 | |
25dd7350 | 5364 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
14efb9b7 | 5365 | { |
5366 | m = MATCH_ERROR; | |
5367 | goto cleanup; | |
5368 | } | |
5369 | ||
4ee9c684 | 5370 | if ((current_attr.external || current_attr.intrinsic) |
5371 | && sym->attr.flavor != FL_PROCEDURE | |
950683ed | 5372 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
4ee9c684 | 5373 | { |
5374 | m = MATCH_ERROR; | |
5375 | goto cleanup; | |
5376 | } | |
5377 | ||
5378 | return MATCH_YES; | |
5379 | ||
5380 | cleanup: | |
5381 | gfc_free_array_spec (as); | |
5382 | return m; | |
5383 | } | |
5384 | ||
5385 | ||
5386 | /* Generic attribute declaration subroutine. Used for attributes that | |
5387 | just have a list of names. */ | |
5388 | ||
5389 | static match | |
5390 | attr_decl (void) | |
5391 | { | |
5392 | match m; | |
5393 | ||
5394 | /* Gobble the optional double colon, by simply ignoring the result | |
5395 | of gfc_match(). */ | |
5396 | gfc_match (" ::"); | |
5397 | ||
5398 | for (;;) | |
5399 | { | |
5400 | m = attr_decl1 (); | |
5401 | if (m != MATCH_YES) | |
5402 | break; | |
5403 | ||
5404 | if (gfc_match_eos () == MATCH_YES) | |
5405 | { | |
5406 | m = MATCH_YES; | |
5407 | break; | |
5408 | } | |
5409 | ||
5410 | if (gfc_match_char (',') != MATCH_YES) | |
5411 | { | |
5412 | gfc_error ("Unexpected character in variable list at %C"); | |
5413 | m = MATCH_ERROR; | |
5414 | break; | |
5415 | } | |
5416 | } | |
5417 | ||
5418 | return m; | |
5419 | } | |
5420 | ||
5421 | ||
b549d2a5 | 5422 | /* This routine matches Cray Pointer declarations of the form: |
5423 | pointer ( <pointer>, <pointee> ) | |
5424 | or | |
e14bee04 | 5425 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
5426 | The pointer, if already declared, should be an integer. Otherwise, we | |
b549d2a5 | 5427 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
5428 | be either a scalar, or an array declaration. No space is allocated for | |
e14bee04 | 5429 | the pointee. For the statement |
b549d2a5 | 5430 | pointer (ipt, ar(10)) |
5431 | any subsequent uses of ar will be translated (in C-notation) as | |
e14bee04 | 5432 | ar(i) => ((<type> *) ipt)(i) |
b7bf3f81 | 5433 | After gimplification, pointee variable will disappear in the code. */ |
b549d2a5 | 5434 | |
5435 | static match | |
5436 | cray_pointer_decl (void) | |
5437 | { | |
5438 | match m; | |
5439 | gfc_array_spec *as; | |
5440 | gfc_symbol *cptr; /* Pointer symbol. */ | |
5441 | gfc_symbol *cpte; /* Pointee symbol. */ | |
5442 | locus var_locus; | |
5443 | bool done = false; | |
5444 | ||
5445 | while (!done) | |
5446 | { | |
5447 | if (gfc_match_char ('(') != MATCH_YES) | |
5448 | { | |
5449 | gfc_error ("Expected '(' at %C"); | |
e14bee04 | 5450 | return MATCH_ERROR; |
b549d2a5 | 5451 | } |
e14bee04 | 5452 | |
b549d2a5 | 5453 | /* Match pointer. */ |
5454 | var_locus = gfc_current_locus; | |
5455 | gfc_clear_attr (¤t_attr); | |
5456 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
5457 | current_ts.type = BT_INTEGER; | |
5458 | current_ts.kind = gfc_index_integer_kind; | |
5459 | ||
e14bee04 | 5460 | m = gfc_match_symbol (&cptr, 0); |
b549d2a5 | 5461 | if (m != MATCH_YES) |
5462 | { | |
5463 | gfc_error ("Expected variable name at %C"); | |
5464 | return m; | |
5465 | } | |
e14bee04 | 5466 | |
b549d2a5 | 5467 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) |
5468 | return MATCH_ERROR; | |
5469 | ||
e14bee04 | 5470 | gfc_set_sym_referenced (cptr); |
b549d2a5 | 5471 | |
5472 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
5473 | { | |
5474 | cptr->ts.type = BT_INTEGER; | |
e14bee04 | 5475 | cptr->ts.kind = gfc_index_integer_kind; |
b549d2a5 | 5476 | } |
5477 | else if (cptr->ts.type != BT_INTEGER) | |
5478 | { | |
7698a624 | 5479 | gfc_error ("Cray pointer at %C must be an integer"); |
b549d2a5 | 5480 | return MATCH_ERROR; |
5481 | } | |
5482 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
5483 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
7698a624 | 5484 | " memory addresses require %d bytes", |
1a9745d2 | 5485 | cptr->ts.kind, gfc_index_integer_kind); |
b549d2a5 | 5486 | |
5487 | if (gfc_match_char (',') != MATCH_YES) | |
5488 | { | |
5489 | gfc_error ("Expected \",\" at %C"); | |
e14bee04 | 5490 | return MATCH_ERROR; |
b549d2a5 | 5491 | } |
5492 | ||
e14bee04 | 5493 | /* Match Pointee. */ |
b549d2a5 | 5494 | var_locus = gfc_current_locus; |
5495 | gfc_clear_attr (¤t_attr); | |
5496 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
5497 | current_ts.type = BT_UNKNOWN; | |
5498 | current_ts.kind = 0; | |
5499 | ||
5500 | m = gfc_match_symbol (&cpte, 0); | |
5501 | if (m != MATCH_YES) | |
5502 | { | |
5503 | gfc_error ("Expected variable name at %C"); | |
5504 | return m; | |
5505 | } | |
e14bee04 | 5506 | |
b549d2a5 | 5507 | /* Check for an optional array spec. */ |
5508 | m = gfc_match_array_spec (&as); | |
5509 | if (m == MATCH_ERROR) | |
5510 | { | |
5511 | gfc_free_array_spec (as); | |
5512 | return m; | |
5513 | } | |
5514 | else if (m == MATCH_NO) | |
5515 | { | |
5516 | gfc_free_array_spec (as); | |
5517 | as = NULL; | |
5518 | } | |
5519 | ||
5520 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
5521 | return MATCH_ERROR; | |
5522 | ||
5523 | gfc_set_sym_referenced (cpte); | |
5524 | ||
5525 | if (cpte->as == NULL) | |
5526 | { | |
5527 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
5528 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
5529 | } | |
5530 | else if (as != NULL) | |
5531 | { | |
7698a624 | 5532 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 5533 | gfc_free_array_spec (as); |
5534 | return MATCH_ERROR; | |
5535 | } | |
5536 | ||
5537 | as = NULL; | |
5538 | ||
5539 | if (cpte->as != NULL) | |
5540 | { | |
5541 | /* Fix array spec. */ | |
5542 | m = gfc_mod_pointee_as (cpte->as); | |
5543 | if (m == MATCH_ERROR) | |
5544 | return m; | |
5545 | } | |
5546 | ||
5547 | /* Point the Pointee at the Pointer. */ | |
b7bf3f81 | 5548 | cpte->cp_pointer = cptr; |
b549d2a5 | 5549 | |
5550 | if (gfc_match_char (')') != MATCH_YES) | |
5551 | { | |
5552 | gfc_error ("Expected \")\" at %C"); | |
5553 | return MATCH_ERROR; | |
5554 | } | |
5555 | m = gfc_match_char (','); | |
5556 | if (m != MATCH_YES) | |
5557 | done = true; /* Stop searching for more declarations. */ | |
5558 | ||
5559 | } | |
5560 | ||
5561 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
5562 | || gfc_match_eos () != MATCH_YES) | |
5563 | { | |
5564 | gfc_error ("Expected \",\" or end of statement at %C"); | |
5565 | return MATCH_ERROR; | |
5566 | } | |
5567 | return MATCH_YES; | |
5568 | } | |
5569 | ||
5570 | ||
4ee9c684 | 5571 | match |
5572 | gfc_match_external (void) | |
5573 | { | |
5574 | ||
5575 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5576 | current_attr.external = 1; |
4ee9c684 | 5577 | |
5578 | return attr_decl (); | |
5579 | } | |
5580 | ||
5581 | ||
4ee9c684 | 5582 | match |
5583 | gfc_match_intent (void) | |
5584 | { | |
5585 | sym_intent intent; | |
5586 | ||
5587 | intent = match_intent_spec (); | |
5588 | if (intent == INTENT_UNKNOWN) | |
5589 | return MATCH_ERROR; | |
5590 | ||
5591 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5592 | current_attr.intent = intent; |
4ee9c684 | 5593 | |
5594 | return attr_decl (); | |
5595 | } | |
5596 | ||
5597 | ||
5598 | match | |
5599 | gfc_match_intrinsic (void) | |
5600 | { | |
5601 | ||
5602 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5603 | current_attr.intrinsic = 1; |
4ee9c684 | 5604 | |
5605 | return attr_decl (); | |
5606 | } | |
5607 | ||
5608 | ||
5609 | match | |
5610 | gfc_match_optional (void) | |
5611 | { | |
5612 | ||
5613 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5614 | current_attr.optional = 1; |
4ee9c684 | 5615 | |
5616 | return attr_decl (); | |
5617 | } | |
5618 | ||
5619 | ||
5620 | match | |
5621 | gfc_match_pointer (void) | |
5622 | { | |
b549d2a5 | 5623 | gfc_gobble_whitespace (); |
e0be6f02 | 5624 | if (gfc_peek_ascii_char () == '(') |
b549d2a5 | 5625 | { |
5626 | if (!gfc_option.flag_cray_pointer) | |
5627 | { | |
1a9745d2 | 5628 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
5629 | "flag"); | |
b549d2a5 | 5630 | return MATCH_ERROR; |
5631 | } | |
5632 | return cray_pointer_decl (); | |
5633 | } | |
5634 | else | |
5635 | { | |
5636 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5637 | current_attr.pointer = 1; |
b549d2a5 | 5638 | |
5639 | return attr_decl (); | |
5640 | } | |
4ee9c684 | 5641 | } |
5642 | ||
5643 | ||
5644 | match | |
5645 | gfc_match_allocatable (void) | |
5646 | { | |
4ee9c684 | 5647 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5648 | current_attr.allocatable = 1; |
4ee9c684 | 5649 | |
5650 | return attr_decl (); | |
5651 | } | |
5652 | ||
5653 | ||
5654 | match | |
5655 | gfc_match_dimension (void) | |
5656 | { | |
4ee9c684 | 5657 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5658 | current_attr.dimension = 1; |
4ee9c684 | 5659 | |
5660 | return attr_decl (); | |
5661 | } | |
5662 | ||
5663 | ||
5664 | match | |
5665 | gfc_match_target (void) | |
5666 | { | |
4ee9c684 | 5667 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5668 | current_attr.target = 1; |
4ee9c684 | 5669 | |
5670 | return attr_decl (); | |
5671 | } | |
5672 | ||
5673 | ||
5674 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
5675 | statement. */ | |
5676 | ||
5677 | static match | |
5678 | access_attr_decl (gfc_statement st) | |
5679 | { | |
5680 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5681 | interface_type type; | |
5682 | gfc_user_op *uop; | |
5683 | gfc_symbol *sym; | |
dcb1b019 | 5684 | gfc_intrinsic_op op; |
4ee9c684 | 5685 | match m; |
5686 | ||
5687 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5688 | goto done; | |
5689 | ||
5690 | for (;;) | |
5691 | { | |
dcb1b019 | 5692 | m = gfc_match_generic_spec (&type, name, &op); |
4ee9c684 | 5693 | if (m == MATCH_NO) |
5694 | goto syntax; | |
5695 | if (m == MATCH_ERROR) | |
5696 | return MATCH_ERROR; | |
5697 | ||
5698 | switch (type) | |
5699 | { | |
5700 | case INTERFACE_NAMELESS: | |
94fa7146 | 5701 | case INTERFACE_ABSTRACT: |
4ee9c684 | 5702 | goto syntax; |
5703 | ||
5704 | case INTERFACE_GENERIC: | |
5705 | if (gfc_get_symbol (name, NULL, &sym)) | |
5706 | goto done; | |
5707 | ||
1a9745d2 | 5708 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
5709 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
950683ed | 5710 | sym->name, NULL) == FAILURE) |
4ee9c684 | 5711 | return MATCH_ERROR; |
5712 | ||
5713 | break; | |
5714 | ||
5715 | case INTERFACE_INTRINSIC_OP: | |
dcb1b019 | 5716 | if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN) |
4ee9c684 | 5717 | { |
dcb1b019 | 5718 | gfc_current_ns->operator_access[op] = |
4ee9c684 | 5719 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; |
5720 | } | |
5721 | else | |
5722 | { | |
5723 | gfc_error ("Access specification of the %s operator at %C has " | |
dcb1b019 | 5724 | "already been specified", gfc_op2string (op)); |
4ee9c684 | 5725 | goto done; |
5726 | } | |
5727 | ||
5728 | break; | |
5729 | ||
5730 | case INTERFACE_USER_OP: | |
5731 | uop = gfc_get_uop (name); | |
5732 | ||
5733 | if (uop->access == ACCESS_UNKNOWN) | |
5734 | { | |
1a9745d2 | 5735 | uop->access = (st == ST_PUBLIC) |
5736 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
4ee9c684 | 5737 | } |
5738 | else | |
5739 | { | |
1a9745d2 | 5740 | gfc_error ("Access specification of the .%s. operator at %C " |
5741 | "has already been specified", sym->name); | |
4ee9c684 | 5742 | goto done; |
5743 | } | |
5744 | ||
5745 | break; | |
5746 | } | |
5747 | ||
5748 | if (gfc_match_char (',') == MATCH_NO) | |
5749 | break; | |
5750 | } | |
5751 | ||
5752 | if (gfc_match_eos () != MATCH_YES) | |
5753 | goto syntax; | |
5754 | return MATCH_YES; | |
5755 | ||
5756 | syntax: | |
5757 | gfc_syntax_error (st); | |
5758 | ||
5759 | done: | |
5760 | return MATCH_ERROR; | |
5761 | } | |
5762 | ||
5763 | ||
3ea52af3 | 5764 | match |
5765 | gfc_match_protected (void) | |
5766 | { | |
5767 | gfc_symbol *sym; | |
5768 | match m; | |
5769 | ||
5770 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
5771 | { | |
5772 | gfc_error ("PROTECTED at %C only allowed in specification " | |
5773 | "part of a module"); | |
5774 | return MATCH_ERROR; | |
5775 | ||
5776 | } | |
5777 | ||
1a9745d2 | 5778 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
3ea52af3 | 5779 | == FAILURE) |
5780 | return MATCH_ERROR; | |
5781 | ||
5782 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5783 | { | |
5784 | return MATCH_ERROR; | |
5785 | } | |
5786 | ||
5787 | if (gfc_match_eos () == MATCH_YES) | |
5788 | goto syntax; | |
5789 | ||
5790 | for(;;) | |
5791 | { | |
5792 | m = gfc_match_symbol (&sym, 0); | |
5793 | switch (m) | |
5794 | { | |
5795 | case MATCH_YES: | |
1a9745d2 | 5796 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
5797 | == FAILURE) | |
3ea52af3 | 5798 | return MATCH_ERROR; |
5799 | goto next_item; | |
5800 | ||
5801 | case MATCH_NO: | |
5802 | break; | |
5803 | ||
5804 | case MATCH_ERROR: | |
5805 | return MATCH_ERROR; | |
5806 | } | |
5807 | ||
5808 | next_item: | |
5809 | if (gfc_match_eos () == MATCH_YES) | |
5810 | break; | |
5811 | if (gfc_match_char (',') != MATCH_YES) | |
5812 | goto syntax; | |
5813 | } | |
5814 | ||
5815 | return MATCH_YES; | |
5816 | ||
5817 | syntax: | |
5818 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
5819 | return MATCH_ERROR; | |
5820 | } | |
5821 | ||
5822 | ||
a0527218 | 5823 | /* The PRIVATE statement is a bit weird in that it can be an attribute |
69b1505f | 5824 | declaration, but also works as a standalone statement inside of a |
4ee9c684 | 5825 | type declaration or a module. */ |
5826 | ||
5827 | match | |
1a9745d2 | 5828 | gfc_match_private (gfc_statement *st) |
4ee9c684 | 5829 | { |
5830 | ||
5831 | if (gfc_match ("private") != MATCH_YES) | |
5832 | return MATCH_NO; | |
5833 | ||
e14bee04 | 5834 | if (gfc_current_state () != COMP_MODULE |
7fd88f6e | 5835 | && !(gfc_current_state () == COMP_DERIVED |
5836 | && gfc_state_stack->previous | |
5837 | && gfc_state_stack->previous->state == COMP_MODULE) | |
5838 | && !(gfc_current_state () == COMP_DERIVED_CONTAINS | |
5839 | && gfc_state_stack->previous && gfc_state_stack->previous->previous | |
5840 | && gfc_state_stack->previous->previous->state == COMP_MODULE)) | |
e14bee04 | 5841 | { |
5842 | gfc_error ("PRIVATE statement at %C is only allowed in the " | |
5843 | "specification part of a module"); | |
5844 | return MATCH_ERROR; | |
5845 | } | |
5846 | ||
4ee9c684 | 5847 | if (gfc_current_state () == COMP_DERIVED) |
5848 | { | |
5849 | if (gfc_match_eos () == MATCH_YES) | |
5850 | { | |
5851 | *st = ST_PRIVATE; | |
5852 | return MATCH_YES; | |
5853 | } | |
5854 | ||
5855 | gfc_syntax_error (ST_PRIVATE); | |
5856 | return MATCH_ERROR; | |
5857 | } | |
5858 | ||
5859 | if (gfc_match_eos () == MATCH_YES) | |
5860 | { | |
5861 | *st = ST_PRIVATE; | |
5862 | return MATCH_YES; | |
5863 | } | |
5864 | ||
5865 | *st = ST_ATTR_DECL; | |
5866 | return access_attr_decl (ST_PRIVATE); | |
5867 | } | |
5868 | ||
5869 | ||
5870 | match | |
1a9745d2 | 5871 | gfc_match_public (gfc_statement *st) |
4ee9c684 | 5872 | { |
5873 | ||
5874 | if (gfc_match ("public") != MATCH_YES) | |
5875 | return MATCH_NO; | |
5876 | ||
e14bee04 | 5877 | if (gfc_current_state () != COMP_MODULE) |
5878 | { | |
5879 | gfc_error ("PUBLIC statement at %C is only allowed in the " | |
5880 | "specification part of a module"); | |
5881 | return MATCH_ERROR; | |
5882 | } | |
5883 | ||
4ee9c684 | 5884 | if (gfc_match_eos () == MATCH_YES) |
5885 | { | |
5886 | *st = ST_PUBLIC; | |
5887 | return MATCH_YES; | |
5888 | } | |
5889 | ||
5890 | *st = ST_ATTR_DECL; | |
5891 | return access_attr_decl (ST_PUBLIC); | |
5892 | } | |
5893 | ||
5894 | ||
5895 | /* Workhorse for gfc_match_parameter. */ | |
5896 | ||
5897 | static match | |
5898 | do_parm (void) | |
5899 | { | |
5900 | gfc_symbol *sym; | |
5901 | gfc_expr *init; | |
5902 | match m; | |
5903 | ||
5904 | m = gfc_match_symbol (&sym, 0); | |
5905 | if (m == MATCH_NO) | |
5906 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
5907 | ||
5908 | if (m != MATCH_YES) | |
5909 | return m; | |
5910 | ||
5911 | if (gfc_match_char ('=') == MATCH_NO) | |
5912 | { | |
5913 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
5914 | return MATCH_ERROR; | |
5915 | } | |
5916 | ||
5917 | m = gfc_match_init_expr (&init); | |
5918 | if (m == MATCH_NO) | |
5919 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
5920 | if (m != MATCH_YES) | |
5921 | return m; | |
5922 | ||
5923 | if (sym->ts.type == BT_UNKNOWN | |
5924 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
5925 | { | |
5926 | m = MATCH_ERROR; | |
5927 | goto cleanup; | |
5928 | } | |
5929 | ||
5930 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
950683ed | 5931 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
4ee9c684 | 5932 | { |
5933 | m = MATCH_ERROR; | |
5934 | goto cleanup; | |
5935 | } | |
5936 | ||
13aebeb0 | 5937 | if (sym->value) |
5938 | { | |
5939 | gfc_error ("Initializing already initialized variable at %C"); | |
5940 | m = MATCH_ERROR; | |
5941 | goto cleanup; | |
5942 | } | |
5943 | ||
c1b6da4a | 5944 | if (sym->ts.type == BT_CHARACTER |
5945 | && sym->ts.cl != NULL | |
5946 | && sym->ts.cl->length != NULL | |
5947 | && sym->ts.cl->length->expr_type == EXPR_CONSTANT | |
5948 | && init->expr_type == EXPR_CONSTANT | |
f97d54ed | 5949 | && init->ts.type == BT_CHARACTER) |
c1b6da4a | 5950 | gfc_set_constant_character_len ( |
d1a39099 | 5951 | mpz_get_si (sym->ts.cl->length->value.integer), init, -1); |
f97d54ed | 5952 | else if (sym->ts.type == BT_CHARACTER && sym->ts.cl != NULL |
5953 | && sym->ts.cl->length == NULL) | |
5954 | { | |
5955 | int clen; | |
5956 | if (init->expr_type == EXPR_CONSTANT) | |
5957 | { | |
5958 | clen = init->value.character.length; | |
5959 | sym->ts.cl->length = gfc_int_expr (clen); | |
5960 | } | |
5961 | else if (init->expr_type == EXPR_ARRAY) | |
5962 | { | |
5963 | gfc_expr *p = init->value.constructor->expr; | |
5964 | clen = p->value.character.length; | |
5965 | sym->ts.cl->length = gfc_int_expr (clen); | |
5966 | } | |
5967 | else if (init->ts.cl && init->ts.cl->length) | |
5968 | sym->ts.cl->length = gfc_copy_expr (sym->value->ts.cl->length); | |
5969 | } | |
c1b6da4a | 5970 | |
4ee9c684 | 5971 | sym->value = init; |
5972 | return MATCH_YES; | |
5973 | ||
5974 | cleanup: | |
5975 | gfc_free_expr (init); | |
5976 | return m; | |
5977 | } | |
5978 | ||
5979 | ||
5980 | /* Match a parameter statement, with the weird syntax that these have. */ | |
5981 | ||
5982 | match | |
5983 | gfc_match_parameter (void) | |
5984 | { | |
5985 | match m; | |
5986 | ||
5987 | if (gfc_match_char ('(') == MATCH_NO) | |
5988 | return MATCH_NO; | |
5989 | ||
5990 | for (;;) | |
5991 | { | |
5992 | m = do_parm (); | |
5993 | if (m != MATCH_YES) | |
5994 | break; | |
5995 | ||
5996 | if (gfc_match (" )%t") == MATCH_YES) | |
5997 | break; | |
5998 | ||
5999 | if (gfc_match_char (',') != MATCH_YES) | |
6000 | { | |
6001 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
6002 | m = MATCH_ERROR; | |
6003 | break; | |
6004 | } | |
6005 | } | |
6006 | ||
6007 | return m; | |
6008 | } | |
6009 | ||
6010 | ||
6011 | /* Save statements have a special syntax. */ | |
6012 | ||
6013 | match | |
6014 | gfc_match_save (void) | |
6015 | { | |
82f5ee13 | 6016 | char n[GFC_MAX_SYMBOL_LEN+1]; |
6017 | gfc_common_head *c; | |
4ee9c684 | 6018 | gfc_symbol *sym; |
6019 | match m; | |
6020 | ||
6021 | if (gfc_match_eos () == MATCH_YES) | |
6022 | { | |
6023 | if (gfc_current_ns->seen_save) | |
6024 | { | |
1a9745d2 | 6025 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
6026 | "follows previous SAVE statement") | |
76e82f95 | 6027 | == FAILURE) |
6028 | return MATCH_ERROR; | |
4ee9c684 | 6029 | } |
6030 | ||
6031 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
6032 | return MATCH_YES; | |
6033 | } | |
6034 | ||
6035 | if (gfc_current_ns->save_all) | |
6036 | { | |
1a9745d2 | 6037 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
6038 | "blanket SAVE statement") | |
76e82f95 | 6039 | == FAILURE) |
6040 | return MATCH_ERROR; | |
4ee9c684 | 6041 | } |
6042 | ||
6043 | gfc_match (" ::"); | |
6044 | ||
6045 | for (;;) | |
6046 | { | |
6047 | m = gfc_match_symbol (&sym, 0); | |
6048 | switch (m) | |
6049 | { | |
6050 | case MATCH_YES: | |
1a9745d2 | 6051 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
6052 | == FAILURE) | |
4ee9c684 | 6053 | return MATCH_ERROR; |
6054 | goto next_item; | |
6055 | ||
6056 | case MATCH_NO: | |
6057 | break; | |
6058 | ||
6059 | case MATCH_ERROR: | |
6060 | return MATCH_ERROR; | |
6061 | } | |
6062 | ||
82f5ee13 | 6063 | m = gfc_match (" / %n /", &n); |
4ee9c684 | 6064 | if (m == MATCH_ERROR) |
6065 | return MATCH_ERROR; | |
6066 | if (m == MATCH_NO) | |
6067 | goto syntax; | |
6068 | ||
403ddc45 | 6069 | c = gfc_get_common (n, 0); |
82f5ee13 | 6070 | c->saved = 1; |
6071 | ||
4ee9c684 | 6072 | gfc_current_ns->seen_save = 1; |
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 SAVE statement at %C"); | |
6085 | return MATCH_ERROR; | |
6086 | } | |
6087 | ||
6088 | ||
8f6339b6 | 6089 | match |
6090 | gfc_match_value (void) | |
6091 | { | |
6092 | gfc_symbol *sym; | |
6093 | match m; | |
6094 | ||
1a9745d2 | 6095 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
8f6339b6 | 6096 | == FAILURE) |
6097 | return MATCH_ERROR; | |
6098 | ||
6099 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6100 | { | |
6101 | return MATCH_ERROR; | |
6102 | } | |
6103 | ||
6104 | if (gfc_match_eos () == MATCH_YES) | |
6105 | goto syntax; | |
6106 | ||
6107 | for(;;) | |
6108 | { | |
6109 | m = gfc_match_symbol (&sym, 0); | |
6110 | switch (m) | |
6111 | { | |
6112 | case MATCH_YES: | |
1a9745d2 | 6113 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
6114 | == FAILURE) | |
8f6339b6 | 6115 | return MATCH_ERROR; |
6116 | goto next_item; | |
6117 | ||
6118 | case MATCH_NO: | |
6119 | break; | |
6120 | ||
6121 | case MATCH_ERROR: | |
6122 | return MATCH_ERROR; | |
6123 | } | |
6124 | ||
6125 | next_item: | |
6126 | if (gfc_match_eos () == MATCH_YES) | |
6127 | break; | |
6128 | if (gfc_match_char (',') != MATCH_YES) | |
6129 | goto syntax; | |
6130 | } | |
6131 | ||
6132 | return MATCH_YES; | |
6133 | ||
6134 | syntax: | |
6135 | gfc_error ("Syntax error in VALUE statement at %C"); | |
6136 | return MATCH_ERROR; | |
6137 | } | |
6138 | ||
f6d0e37a | 6139 | |
ef814c81 | 6140 | match |
6141 | gfc_match_volatile (void) | |
6142 | { | |
6143 | gfc_symbol *sym; | |
6144 | match m; | |
6145 | ||
1a9745d2 | 6146 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
ef814c81 | 6147 | == FAILURE) |
6148 | return MATCH_ERROR; | |
6149 | ||
6150 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6151 | { | |
6152 | return MATCH_ERROR; | |
6153 | } | |
6154 | ||
6155 | if (gfc_match_eos () == MATCH_YES) | |
6156 | goto syntax; | |
6157 | ||
6158 | for(;;) | |
6159 | { | |
2f241857 | 6160 | /* VOLATILE is special because it can be added to host-associated |
6161 | symbols locally. */ | |
6162 | m = gfc_match_symbol (&sym, 1); | |
ef814c81 | 6163 | switch (m) |
6164 | { | |
6165 | case MATCH_YES: | |
1a9745d2 | 6166 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
6167 | == FAILURE) | |
ef814c81 | 6168 | return MATCH_ERROR; |
6169 | goto next_item; | |
6170 | ||
6171 | case MATCH_NO: | |
6172 | break; | |
6173 | ||
6174 | case MATCH_ERROR: | |
6175 | return MATCH_ERROR; | |
6176 | } | |
6177 | ||
6178 | next_item: | |
6179 | if (gfc_match_eos () == MATCH_YES) | |
6180 | break; | |
6181 | if (gfc_match_char (',') != MATCH_YES) | |
6182 | goto syntax; | |
6183 | } | |
6184 | ||
6185 | return MATCH_YES; | |
6186 | ||
6187 | syntax: | |
6188 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
6189 | return MATCH_ERROR; | |
6190 | } | |
6191 | ||
6192 | ||
4ee9c684 | 6193 | /* Match a module procedure statement. Note that we have to modify |
6194 | symbols in the parent's namespace because the current one was there | |
89d91d02 | 6195 | to receive symbols that are in an interface's formal argument list. */ |
4ee9c684 | 6196 | |
6197 | match | |
6198 | gfc_match_modproc (void) | |
6199 | { | |
6200 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6201 | gfc_symbol *sym; | |
6202 | match m; | |
63d42079 | 6203 | gfc_namespace *module_ns; |
94ce9f74 | 6204 | gfc_interface *old_interface_head, *interface; |
4ee9c684 | 6205 | |
6206 | if (gfc_state_stack->state != COMP_INTERFACE | |
6207 | || gfc_state_stack->previous == NULL | |
5cf92482 | 6208 | || current_interface.type == INTERFACE_NAMELESS |
6209 | || current_interface.type == INTERFACE_ABSTRACT) | |
4ee9c684 | 6210 | { |
1a9745d2 | 6211 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
6212 | "interface"); | |
4ee9c684 | 6213 | return MATCH_ERROR; |
6214 | } | |
6215 | ||
63d42079 | 6216 | module_ns = gfc_current_ns->parent; |
6217 | for (; module_ns; module_ns = module_ns->parent) | |
6218 | if (module_ns->proc_name->attr.flavor == FL_MODULE) | |
6219 | break; | |
6220 | ||
6221 | if (module_ns == NULL) | |
6222 | return MATCH_ERROR; | |
6223 | ||
94ce9f74 | 6224 | /* Store the current state of the interface. We will need it if we |
6225 | end up with a syntax error and need to recover. */ | |
6226 | old_interface_head = gfc_current_interface_head (); | |
6227 | ||
4ee9c684 | 6228 | for (;;) |
6229 | { | |
94ce9f74 | 6230 | bool last = false; |
6231 | ||
4ee9c684 | 6232 | m = gfc_match_name (name); |
6233 | if (m == MATCH_NO) | |
6234 | goto syntax; | |
6235 | if (m != MATCH_YES) | |
6236 | return MATCH_ERROR; | |
6237 | ||
94ce9f74 | 6238 | /* Check for syntax error before starting to add symbols to the |
6239 | current namespace. */ | |
6240 | if (gfc_match_eos () == MATCH_YES) | |
6241 | last = true; | |
6242 | if (!last && gfc_match_char (',') != MATCH_YES) | |
6243 | goto syntax; | |
6244 | ||
6245 | /* Now we're sure the syntax is valid, we process this item | |
6246 | further. */ | |
63d42079 | 6247 | if (gfc_get_symbol (name, module_ns, &sym)) |
4ee9c684 | 6248 | return MATCH_ERROR; |
6249 | ||
6250 | if (sym->attr.proc != PROC_MODULE | |
950683ed | 6251 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
6252 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 6253 | return MATCH_ERROR; |
6254 | ||
6255 | if (gfc_add_interface (sym) == FAILURE) | |
6256 | return MATCH_ERROR; | |
6257 | ||
3186f695 | 6258 | sym->attr.mod_proc = 1; |
6259 | ||
94ce9f74 | 6260 | if (last) |
4ee9c684 | 6261 | break; |
4ee9c684 | 6262 | } |
6263 | ||
6264 | return MATCH_YES; | |
6265 | ||
6266 | syntax: | |
94ce9f74 | 6267 | /* Restore the previous state of the interface. */ |
6268 | interface = gfc_current_interface_head (); | |
6269 | gfc_set_current_interface_head (old_interface_head); | |
6270 | ||
6271 | /* Free the new interfaces. */ | |
6272 | while (interface != old_interface_head) | |
6273 | { | |
6274 | gfc_interface *i = interface->next; | |
6275 | gfc_free (interface); | |
6276 | interface = i; | |
6277 | } | |
6278 | ||
6279 | /* And issue a syntax error. */ | |
4ee9c684 | 6280 | gfc_syntax_error (ST_MODULE_PROC); |
6281 | return MATCH_ERROR; | |
6282 | } | |
6283 | ||
6284 | ||
ea94d76d | 6285 | /* Check a derived type that is being extended. */ |
6286 | static gfc_symbol* | |
6287 | check_extended_derived_type (char *name) | |
6288 | { | |
6289 | gfc_symbol *extended; | |
6290 | ||
6291 | if (gfc_find_symbol (name, gfc_current_ns, 1, &extended)) | |
6292 | { | |
6293 | gfc_error ("Ambiguous symbol in TYPE definition at %C"); | |
6294 | return NULL; | |
6295 | } | |
6296 | ||
6297 | if (!extended) | |
6298 | { | |
6299 | gfc_error ("No such symbol in TYPE definition at %C"); | |
6300 | return NULL; | |
6301 | } | |
6302 | ||
6303 | if (extended->attr.flavor != FL_DERIVED) | |
6304 | { | |
6305 | gfc_error ("'%s' in EXTENDS expression at %C is not a " | |
6306 | "derived type", name); | |
6307 | return NULL; | |
6308 | } | |
6309 | ||
6310 | if (extended->attr.is_bind_c) | |
6311 | { | |
6312 | gfc_error ("'%s' cannot be extended at %C because it " | |
6313 | "is BIND(C)", extended->name); | |
6314 | return NULL; | |
6315 | } | |
6316 | ||
6317 | if (extended->attr.sequence) | |
6318 | { | |
6319 | gfc_error ("'%s' cannot be extended at %C because it " | |
6320 | "is a SEQUENCE type", extended->name); | |
6321 | return NULL; | |
6322 | } | |
6323 | ||
6324 | return extended; | |
6325 | } | |
6326 | ||
6327 | ||
c5d33754 | 6328 | /* Match the optional attribute specifiers for a type declaration. |
6329 | Return MATCH_ERROR if an error is encountered in one of the handled | |
6330 | attributes (public, private, bind(c)), MATCH_NO if what's found is | |
6331 | not a handled attribute, and MATCH_YES otherwise. TODO: More error | |
6332 | checking on attribute conflicts needs to be done. */ | |
4ee9c684 | 6333 | |
6334 | match | |
ea94d76d | 6335 | gfc_get_type_attr_spec (symbol_attribute *attr, char *name) |
4ee9c684 | 6336 | { |
c5d33754 | 6337 | /* See if the derived type is marked as private. */ |
4ee9c684 | 6338 | if (gfc_match (" , private") == MATCH_YES) |
6339 | { | |
e14bee04 | 6340 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 6341 | { |
e14bee04 | 6342 | gfc_error ("Derived type at %C can only be PRIVATE in the " |
6343 | "specification part of a module"); | |
4ee9c684 | 6344 | return MATCH_ERROR; |
6345 | } | |
6346 | ||
c5d33754 | 6347 | if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
4ee9c684 | 6348 | return MATCH_ERROR; |
4ee9c684 | 6349 | } |
c5d33754 | 6350 | else if (gfc_match (" , public") == MATCH_YES) |
4ee9c684 | 6351 | { |
e14bee04 | 6352 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 6353 | { |
e14bee04 | 6354 | gfc_error ("Derived type at %C can only be PUBLIC in the " |
6355 | "specification part of a module"); | |
4ee9c684 | 6356 | return MATCH_ERROR; |
6357 | } | |
6358 | ||
c5d33754 | 6359 | if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
4ee9c684 | 6360 | return MATCH_ERROR; |
4ee9c684 | 6361 | } |
ac5f2650 | 6362 | else if (gfc_match (" , bind ( c )") == MATCH_YES) |
c5d33754 | 6363 | { |
6364 | /* If the type is defined to be bind(c) it then needs to make | |
6365 | sure that all fields are interoperable. This will | |
6366 | need to be a semantic check on the finished derived type. | |
6367 | See 15.2.3 (lines 9-12) of F2003 draft. */ | |
6368 | if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) | |
6369 | return MATCH_ERROR; | |
6370 | ||
6371 | /* TODO: attr conflicts need to be checked, probably in symbol.c. */ | |
6372 | } | |
ac5f2650 | 6373 | else if (gfc_match (" , abstract") == MATCH_YES) |
6374 | { | |
6375 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C") | |
6376 | == FAILURE) | |
6377 | return MATCH_ERROR; | |
6378 | ||
6379 | if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE) | |
6380 | return MATCH_ERROR; | |
6381 | } | |
ea94d76d | 6382 | else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES) |
6383 | { | |
e485ad6b | 6384 | if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE) |
ea94d76d | 6385 | return MATCH_ERROR; |
6386 | } | |
c5d33754 | 6387 | else |
6388 | return MATCH_NO; | |
6389 | ||
6390 | /* If we get here, something matched. */ | |
6391 | return MATCH_YES; | |
6392 | } | |
6393 | ||
6394 | ||
6395 | /* Match the beginning of a derived type declaration. If a type name | |
6396 | was the result of a function, then it is possible to have a symbol | |
6397 | already to be known as a derived type yet have no components. */ | |
6398 | ||
6399 | match | |
6400 | gfc_match_derived_decl (void) | |
6401 | { | |
6402 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
ea94d76d | 6403 | char parent[GFC_MAX_SYMBOL_LEN + 1]; |
c5d33754 | 6404 | symbol_attribute attr; |
6405 | gfc_symbol *sym; | |
ea94d76d | 6406 | gfc_symbol *extended; |
c5d33754 | 6407 | match m; |
6408 | match is_type_attr_spec = MATCH_NO; | |
33e86520 | 6409 | bool seen_attr = false; |
c5d33754 | 6410 | |
6411 | if (gfc_current_state () == COMP_DERIVED) | |
6412 | return MATCH_NO; | |
6413 | ||
ea94d76d | 6414 | name[0] = '\0'; |
6415 | parent[0] = '\0'; | |
c5d33754 | 6416 | gfc_clear_attr (&attr); |
ea94d76d | 6417 | extended = NULL; |
c5d33754 | 6418 | |
6419 | do | |
6420 | { | |
ea94d76d | 6421 | is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent); |
c5d33754 | 6422 | if (is_type_attr_spec == MATCH_ERROR) |
6423 | return MATCH_ERROR; | |
33e86520 | 6424 | if (is_type_attr_spec == MATCH_YES) |
6425 | seen_attr = true; | |
c5d33754 | 6426 | } while (is_type_attr_spec == MATCH_YES); |
4ee9c684 | 6427 | |
e485ad6b | 6428 | /* Deal with derived type extensions. The extension attribute has |
6429 | been added to 'attr' but now the parent type must be found and | |
6430 | checked. */ | |
ea94d76d | 6431 | if (parent[0]) |
6432 | extended = check_extended_derived_type (parent); | |
6433 | ||
6434 | if (parent[0] && !extended) | |
6435 | return MATCH_ERROR; | |
6436 | ||
33e86520 | 6437 | if (gfc_match (" ::") != MATCH_YES && seen_attr) |
4ee9c684 | 6438 | { |
6439 | gfc_error ("Expected :: in TYPE definition at %C"); | |
6440 | return MATCH_ERROR; | |
6441 | } | |
6442 | ||
6443 | m = gfc_match (" %n%t", name); | |
6444 | if (m != MATCH_YES) | |
6445 | return m; | |
6446 | ||
a3055431 | 6447 | /* Make sure the name is not the name of an intrinsic type. */ |
6448 | if (gfc_is_intrinsic_typename (name)) | |
4ee9c684 | 6449 | { |
1a9745d2 | 6450 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
6451 | "type", name); | |
4ee9c684 | 6452 | return MATCH_ERROR; |
6453 | } | |
6454 | ||
6455 | if (gfc_get_symbol (name, NULL, &sym)) | |
6456 | return MATCH_ERROR; | |
6457 | ||
6458 | if (sym->ts.type != BT_UNKNOWN) | |
6459 | { | |
6460 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
6461 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
6462 | return MATCH_ERROR; | |
6463 | } | |
6464 | ||
6465 | /* The symbol may already have the derived attribute without the | |
6466 | components. The ways this can happen is via a function | |
6467 | definition, an INTRINSIC statement or a subtype in another | |
6468 | derived type that is a pointer. The first part of the AND clause | |
69b1505f | 6469 | is true if the symbol is not the return value of a function. */ |
4ee9c684 | 6470 | if (sym->attr.flavor != FL_DERIVED |
950683ed | 6471 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 6472 | return MATCH_ERROR; |
6473 | ||
e6b82afc | 6474 | if (sym->components != NULL || sym->attr.zero_comp) |
4ee9c684 | 6475 | { |
1a9745d2 | 6476 | gfc_error ("Derived type definition of '%s' at %C has already been " |
6477 | "defined", sym->name); | |
4ee9c684 | 6478 | return MATCH_ERROR; |
6479 | } | |
6480 | ||
6481 | if (attr.access != ACCESS_UNKNOWN | |
950683ed | 6482 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
4ee9c684 | 6483 | return MATCH_ERROR; |
6484 | ||
c5d33754 | 6485 | /* See if the derived type was labeled as bind(c). */ |
6486 | if (attr.is_bind_c != 0) | |
6487 | sym->attr.is_bind_c = attr.is_bind_c; | |
6488 | ||
223f0f57 | 6489 | /* Construct the f2k_derived namespace if it is not yet there. */ |
6490 | if (!sym->f2k_derived) | |
6491 | sym->f2k_derived = gfc_get_namespace (NULL, 0); | |
ea94d76d | 6492 | |
6493 | if (extended && !sym->components) | |
6494 | { | |
6495 | gfc_component *p; | |
6496 | gfc_symtree *st; | |
6497 | ||
6498 | /* Add the extended derived type as the first component. */ | |
6499 | gfc_add_component (sym, parent, &p); | |
e485ad6b | 6500 | sym->attr.extension = attr.extension; |
ea94d76d | 6501 | extended->refs++; |
6502 | gfc_set_sym_referenced (extended); | |
6503 | ||
6504 | p->ts.type = BT_DERIVED; | |
6505 | p->ts.derived = extended; | |
6506 | p->initializer = gfc_default_initializer (&p->ts); | |
6507 | ||
6508 | /* Provide the links between the extended type and its extension. */ | |
6509 | if (!extended->f2k_derived) | |
6510 | extended->f2k_derived = gfc_get_namespace (NULL, 0); | |
6511 | st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name); | |
6512 | st->n.sym = sym; | |
6513 | } | |
6514 | ||
ac5f2650 | 6515 | /* Take over the ABSTRACT attribute. */ |
6516 | sym->attr.abstract = attr.abstract; | |
6517 | ||
4ee9c684 | 6518 | gfc_new_block = sym; |
6519 | ||
6520 | return MATCH_YES; | |
6521 | } | |
b549d2a5 | 6522 | |
6523 | ||
6524 | /* Cray Pointees can be declared as: | |
6525 | pointer (ipt, a (n,m,...,*)) | |
6526 | By default, this is treated as an AS_ASSUMED_SIZE array. We'll | |
6527 | cheat and set a constant bound of 1 for the last dimension, if this | |
6528 | is the case. Since there is no bounds-checking for Cray Pointees, | |
6529 | this will be okay. */ | |
6530 | ||
f6bb8f4b | 6531 | gfc_try |
b549d2a5 | 6532 | gfc_mod_pointee_as (gfc_array_spec *as) |
6533 | { | |
6534 | as->cray_pointee = true; /* This will be useful to know later. */ | |
6535 | if (as->type == AS_ASSUMED_SIZE) | |
6536 | { | |
6537 | as->type = AS_EXPLICIT; | |
6538 | as->upper[as->rank - 1] = gfc_int_expr (1); | |
6539 | as->cp_was_assumed = true; | |
6540 | } | |
6541 | else if (as->type == AS_ASSUMED_SHAPE) | |
6542 | { | |
6543 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
6544 | return MATCH_ERROR; | |
6545 | } | |
6546 | return MATCH_YES; | |
6547 | } | |
3b6a4b41 | 6548 | |
6549 | ||
6550 | /* Match the enum definition statement, here we are trying to match | |
6551 | the first line of enum definition statement. | |
6552 | Returns MATCH_YES if match is found. */ | |
6553 | ||
6554 | match | |
6555 | gfc_match_enum (void) | |
6556 | { | |
6557 | match m; | |
6558 | ||
6559 | m = gfc_match_eos (); | |
6560 | if (m != MATCH_YES) | |
6561 | return m; | |
6562 | ||
60fbbf9e | 6563 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") |
3b6a4b41 | 6564 | == FAILURE) |
6565 | return MATCH_ERROR; | |
6566 | ||
6567 | return MATCH_YES; | |
6568 | } | |
6569 | ||
6570 | ||
60fbbf9e | 6571 | /* Match a variable name with an optional initializer. When this |
6572 | subroutine is called, a variable is expected to be parsed next. | |
6573 | Depending on what is happening at the moment, updates either the | |
6574 | symbol table or the current interface. */ | |
6575 | ||
6576 | static match | |
6577 | enumerator_decl (void) | |
6578 | { | |
6579 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6580 | gfc_expr *initializer; | |
6581 | gfc_array_spec *as = NULL; | |
6582 | gfc_symbol *sym; | |
6583 | locus var_locus; | |
6584 | match m; | |
f6bb8f4b | 6585 | gfc_try t; |
60fbbf9e | 6586 | locus old_locus; |
6587 | ||
6588 | initializer = NULL; | |
6589 | old_locus = gfc_current_locus; | |
6590 | ||
6591 | /* When we get here, we've just matched a list of attributes and | |
6592 | maybe a type and a double colon. The next thing we expect to see | |
6593 | is the name of the symbol. */ | |
6594 | m = gfc_match_name (name); | |
6595 | if (m != MATCH_YES) | |
6596 | goto cleanup; | |
6597 | ||
6598 | var_locus = gfc_current_locus; | |
6599 | ||
6600 | /* OK, we've successfully matched the declaration. Now put the | |
6601 | symbol in the current namespace. If we fail to create the symbol, | |
6602 | bail out. */ | |
6603 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
6604 | { | |
6605 | m = MATCH_ERROR; | |
6606 | goto cleanup; | |
6607 | } | |
6608 | ||
6609 | /* The double colon must be present in order to have initializers. | |
6610 | Otherwise the statement is ambiguous with an assignment statement. */ | |
6611 | if (colon_seen) | |
6612 | { | |
6613 | if (gfc_match_char ('=') == MATCH_YES) | |
6614 | { | |
6615 | m = gfc_match_init_expr (&initializer); | |
6616 | if (m == MATCH_NO) | |
6617 | { | |
6618 | gfc_error ("Expected an initialization expression at %C"); | |
6619 | m = MATCH_ERROR; | |
6620 | } | |
6621 | ||
6622 | if (m != MATCH_YES) | |
6623 | goto cleanup; | |
6624 | } | |
6625 | } | |
6626 | ||
6627 | /* If we do not have an initializer, the initialization value of the | |
6628 | previous enumerator (stored in last_initializer) is incremented | |
6629 | by 1 and is used to initialize the current enumerator. */ | |
6630 | if (initializer == NULL) | |
6631 | initializer = gfc_enum_initializer (last_initializer, old_locus); | |
e14bee04 | 6632 | |
60fbbf9e | 6633 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
6634 | { | |
6635 | gfc_error("ENUMERATOR %L not initialized with integer expression", | |
6636 | &var_locus); | |
e14bee04 | 6637 | m = MATCH_ERROR; |
60fbbf9e | 6638 | gfc_free_enum_history (); |
6639 | goto cleanup; | |
6640 | } | |
6641 | ||
6642 | /* Store this current initializer, for the next enumerator variable | |
6643 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
6644 | use last_initializer below. */ | |
6645 | last_initializer = initializer; | |
6646 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
6647 | ||
6648 | /* Maintain enumerator history. */ | |
6649 | gfc_find_symbol (name, NULL, 0, &sym); | |
6650 | create_enum_history (sym, last_initializer); | |
6651 | ||
6652 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
6653 | ||
6654 | cleanup: | |
6655 | /* Free stuff up and return. */ | |
6656 | gfc_free_expr (initializer); | |
6657 | ||
6658 | return m; | |
6659 | } | |
6660 | ||
6661 | ||
f6d0e37a | 6662 | /* Match the enumerator definition statement. */ |
3b6a4b41 | 6663 | |
6664 | match | |
6665 | gfc_match_enumerator_def (void) | |
6666 | { | |
6667 | match m; | |
f6bb8f4b | 6668 | gfc_try t; |
e14bee04 | 6669 | |
3b6a4b41 | 6670 | gfc_clear_ts (¤t_ts); |
e14bee04 | 6671 | |
3b6a4b41 | 6672 | m = gfc_match (" enumerator"); |
6673 | if (m != MATCH_YES) | |
6674 | return m; | |
60fbbf9e | 6675 | |
6676 | m = gfc_match (" :: "); | |
6677 | if (m == MATCH_ERROR) | |
6678 | return m; | |
6679 | ||
6680 | colon_seen = (m == MATCH_YES); | |
e14bee04 | 6681 | |
3b6a4b41 | 6682 | if (gfc_current_state () != COMP_ENUM) |
6683 | { | |
6684 | gfc_error ("ENUM definition statement expected before %C"); | |
6685 | gfc_free_enum_history (); | |
6686 | return MATCH_ERROR; | |
6687 | } | |
6688 | ||
6689 | (¤t_ts)->type = BT_INTEGER; | |
6690 | (¤t_ts)->kind = gfc_c_int_kind; | |
e14bee04 | 6691 | |
60fbbf9e | 6692 | gfc_clear_attr (¤t_attr); |
6693 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
6694 | if (t == FAILURE) | |
3b6a4b41 | 6695 | { |
60fbbf9e | 6696 | m = MATCH_ERROR; |
3b6a4b41 | 6697 | goto cleanup; |
6698 | } | |
6699 | ||
3b6a4b41 | 6700 | for (;;) |
6701 | { | |
60fbbf9e | 6702 | m = enumerator_decl (); |
3b6a4b41 | 6703 | if (m == MATCH_ERROR) |
6704 | goto cleanup; | |
6705 | if (m == MATCH_NO) | |
6706 | break; | |
6707 | ||
6708 | if (gfc_match_eos () == MATCH_YES) | |
6709 | goto cleanup; | |
6710 | if (gfc_match_char (',') != MATCH_YES) | |
6711 | break; | |
6712 | } | |
6713 | ||
6714 | if (gfc_current_state () == COMP_ENUM) | |
6715 | { | |
6716 | gfc_free_enum_history (); | |
6717 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
6718 | m = MATCH_ERROR; | |
6719 | } | |
6720 | ||
6721 | cleanup: | |
6722 | gfc_free_array_spec (current_as); | |
6723 | current_as = NULL; | |
6724 | return m; | |
6725 | ||
6726 | } | |
6727 | ||
e449e4dd | 6728 | |
7fd88f6e | 6729 | /* Match binding attributes. */ |
6730 | ||
6731 | static match | |
e2f06a48 | 6732 | match_binding_attributes (gfc_typebound_proc* ba, bool generic) |
7fd88f6e | 6733 | { |
6734 | bool found_passing = false; | |
6735 | match m; | |
6736 | ||
6737 | /* Intialize to defaults. Do so even before the MATCH_NO check so that in | |
6738 | this case the defaults are in there. */ | |
6739 | ba->access = ACCESS_UNKNOWN; | |
6740 | ba->pass_arg = NULL; | |
6741 | ba->pass_arg_num = 0; | |
6742 | ba->nopass = 0; | |
6743 | ba->non_overridable = 0; | |
61c3b81d | 6744 | ba->deferred = 0; |
7fd88f6e | 6745 | |
6746 | /* If we find a comma, we believe there are binding attributes. */ | |
6747 | if (gfc_match_char (',') == MATCH_NO) | |
e2f06a48 | 6748 | { |
6749 | ba->access = gfc_typebound_default_access; | |
6750 | return MATCH_NO; | |
6751 | } | |
7fd88f6e | 6752 | |
6753 | do | |
6754 | { | |
e2f06a48 | 6755 | /* Access specifier. */ |
6756 | ||
6757 | m = gfc_match (" public"); | |
7fd88f6e | 6758 | if (m == MATCH_ERROR) |
6759 | goto error; | |
6760 | if (m == MATCH_YES) | |
6761 | { | |
e2f06a48 | 6762 | if (ba->access != ACCESS_UNKNOWN) |
7fd88f6e | 6763 | { |
e2f06a48 | 6764 | gfc_error ("Duplicate access-specifier at %C"); |
7fd88f6e | 6765 | goto error; |
6766 | } | |
6767 | ||
e2f06a48 | 6768 | ba->access = ACCESS_PUBLIC; |
7fd88f6e | 6769 | continue; |
6770 | } | |
6771 | ||
e2f06a48 | 6772 | m = gfc_match (" private"); |
7fd88f6e | 6773 | if (m == MATCH_ERROR) |
6774 | goto error; | |
6775 | if (m == MATCH_YES) | |
6776 | { | |
e2f06a48 | 6777 | if (ba->access != ACCESS_UNKNOWN) |
7fd88f6e | 6778 | { |
e2f06a48 | 6779 | gfc_error ("Duplicate access-specifier at %C"); |
7fd88f6e | 6780 | goto error; |
6781 | } | |
6782 | ||
e2f06a48 | 6783 | ba->access = ACCESS_PRIVATE; |
7fd88f6e | 6784 | continue; |
6785 | } | |
6786 | ||
e2f06a48 | 6787 | /* If inside GENERIC, the following is not allowed. */ |
6788 | if (!generic) | |
7fd88f6e | 6789 | { |
7fd88f6e | 6790 | |
e2f06a48 | 6791 | /* NOPASS flag. */ |
6792 | m = gfc_match (" nopass"); | |
6793 | if (m == MATCH_ERROR) | |
6794 | goto error; | |
6795 | if (m == MATCH_YES) | |
7fd88f6e | 6796 | { |
e2f06a48 | 6797 | if (found_passing) |
6798 | { | |
6799 | gfc_error ("Binding attributes already specify passing," | |
6800 | " illegal NOPASS at %C"); | |
6801 | goto error; | |
6802 | } | |
6803 | ||
6804 | found_passing = true; | |
6805 | ba->nopass = 1; | |
6806 | continue; | |
7fd88f6e | 6807 | } |
6808 | ||
e2f06a48 | 6809 | /* NON_OVERRIDABLE flag. */ |
6810 | m = gfc_match (" non_overridable"); | |
7fd88f6e | 6811 | if (m == MATCH_ERROR) |
6812 | goto error; | |
6813 | if (m == MATCH_YES) | |
e2f06a48 | 6814 | { |
6815 | if (ba->non_overridable) | |
6816 | { | |
6817 | gfc_error ("Duplicate NON_OVERRIDABLE at %C"); | |
6818 | goto error; | |
6819 | } | |
7fd88f6e | 6820 | |
e2f06a48 | 6821 | ba->non_overridable = 1; |
6822 | continue; | |
6823 | } | |
7fd88f6e | 6824 | |
e2f06a48 | 6825 | /* DEFERRED flag. */ |
e2f06a48 | 6826 | m = gfc_match (" deferred"); |
6827 | if (m == MATCH_ERROR) | |
6828 | goto error; | |
6829 | if (m == MATCH_YES) | |
7fd88f6e | 6830 | { |
61c3b81d | 6831 | if (ba->deferred) |
6832 | { | |
6833 | gfc_error ("Duplicate DEFERRED at %C"); | |
6834 | goto error; | |
6835 | } | |
6836 | ||
6837 | ba->deferred = 1; | |
6838 | continue; | |
7fd88f6e | 6839 | } |
6840 | ||
e2f06a48 | 6841 | /* PASS possibly including argument. */ |
6842 | m = gfc_match (" pass"); | |
6843 | if (m == MATCH_ERROR) | |
6844 | goto error; | |
6845 | if (m == MATCH_YES) | |
7fd88f6e | 6846 | { |
e2f06a48 | 6847 | char arg[GFC_MAX_SYMBOL_LEN + 1]; |
6848 | ||
6849 | if (found_passing) | |
6850 | { | |
6851 | gfc_error ("Binding attributes already specify passing," | |
6852 | " illegal PASS at %C"); | |
6853 | goto error; | |
6854 | } | |
6855 | ||
6856 | m = gfc_match (" ( %n )", arg); | |
6857 | if (m == MATCH_ERROR) | |
6858 | goto error; | |
6859 | if (m == MATCH_YES) | |
6860 | ba->pass_arg = xstrdup (arg); | |
6861 | gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL)); | |
6862 | ||
6863 | found_passing = true; | |
6864 | ba->nopass = 0; | |
6865 | continue; | |
7fd88f6e | 6866 | } |
6867 | ||
7fd88f6e | 6868 | } |
6869 | ||
6870 | /* Nothing matching found. */ | |
e2f06a48 | 6871 | if (generic) |
6872 | gfc_error ("Expected access-specifier at %C"); | |
6873 | else | |
6874 | gfc_error ("Expected binding attribute at %C"); | |
7fd88f6e | 6875 | goto error; |
6876 | } | |
6877 | while (gfc_match_char (',') == MATCH_YES); | |
6878 | ||
61c3b81d | 6879 | /* NON_OVERRIDABLE and DEFERRED exclude themselves. */ |
6880 | if (ba->non_overridable && ba->deferred) | |
6881 | { | |
6882 | gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C"); | |
6883 | goto error; | |
6884 | } | |
6885 | ||
e2f06a48 | 6886 | if (ba->access == ACCESS_UNKNOWN) |
6887 | ba->access = gfc_typebound_default_access; | |
6888 | ||
7fd88f6e | 6889 | return MATCH_YES; |
6890 | ||
6891 | error: | |
6892 | gfc_free (ba->pass_arg); | |
6893 | return MATCH_ERROR; | |
6894 | } | |
6895 | ||
6896 | ||
6897 | /* Match a PROCEDURE specific binding inside a derived type. */ | |
6898 | ||
6899 | static match | |
6900 | match_procedure_in_type (void) | |
6901 | { | |
6902 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6903 | char target_buf[GFC_MAX_SYMBOL_LEN + 1]; | |
61c3b81d | 6904 | char* target = NULL; |
7fd88f6e | 6905 | gfc_typebound_proc* tb; |
6906 | bool seen_colons; | |
6907 | bool seen_attrs; | |
6908 | match m; | |
6909 | gfc_symtree* stree; | |
6910 | gfc_namespace* ns; | |
6911 | gfc_symbol* block; | |
6912 | ||
6913 | /* Check current state. */ | |
6914 | gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS); | |
6915 | block = gfc_state_stack->previous->sym; | |
6916 | gcc_assert (block); | |
6917 | ||
61c3b81d | 6918 | /* Try to match PROCEDURE(interface). */ |
7fd88f6e | 6919 | if (gfc_match (" (") == MATCH_YES) |
6920 | { | |
61c3b81d | 6921 | m = gfc_match_name (target_buf); |
6922 | if (m == MATCH_ERROR) | |
6923 | return m; | |
6924 | if (m != MATCH_YES) | |
6925 | { | |
6926 | gfc_error ("Interface-name expected after '(' at %C"); | |
6927 | return MATCH_ERROR; | |
6928 | } | |
6929 | ||
6930 | if (gfc_match (" )") != MATCH_YES) | |
6931 | { | |
6932 | gfc_error ("')' expected at %C"); | |
6933 | return MATCH_ERROR; | |
6934 | } | |
6935 | ||
6936 | target = target_buf; | |
7fd88f6e | 6937 | } |
6938 | ||
6939 | /* Construct the data structure. */ | |
930fe1de | 6940 | tb = gfc_get_typebound_proc (); |
7fd88f6e | 6941 | tb->where = gfc_current_locus; |
e2f06a48 | 6942 | tb->is_generic = 0; |
7fd88f6e | 6943 | |
6944 | /* Match binding attributes. */ | |
e2f06a48 | 6945 | m = match_binding_attributes (tb, false); |
7fd88f6e | 6946 | if (m == MATCH_ERROR) |
6947 | return m; | |
6948 | seen_attrs = (m == MATCH_YES); | |
6949 | ||
61c3b81d | 6950 | /* Check that attribute DEFERRED is given iff an interface is specified, which |
6951 | means target != NULL. */ | |
6952 | if (tb->deferred && !target) | |
6953 | { | |
6954 | gfc_error ("Interface must be specified for DEFERRED binding at %C"); | |
6955 | return MATCH_ERROR; | |
6956 | } | |
6957 | if (target && !tb->deferred) | |
6958 | { | |
6959 | gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED"); | |
6960 | return MATCH_ERROR; | |
6961 | } | |
6962 | ||
7fd88f6e | 6963 | /* Match the colons. */ |
6964 | m = gfc_match (" ::"); | |
6965 | if (m == MATCH_ERROR) | |
6966 | return m; | |
6967 | seen_colons = (m == MATCH_YES); | |
6968 | if (seen_attrs && !seen_colons) | |
6969 | { | |
6970 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
6971 | return MATCH_ERROR; | |
6972 | } | |
6973 | ||
6974 | /* Match the binding name. */ | |
6975 | m = gfc_match_name (name); | |
6976 | if (m == MATCH_ERROR) | |
6977 | return m; | |
6978 | if (m == MATCH_NO) | |
6979 | { | |
6980 | gfc_error ("Expected binding name at %C"); | |
6981 | return MATCH_ERROR; | |
6982 | } | |
6983 | ||
6984 | /* Try to match the '=> target', if it's there. */ | |
7fd88f6e | 6985 | m = gfc_match (" =>"); |
6986 | if (m == MATCH_ERROR) | |
6987 | return m; | |
6988 | if (m == MATCH_YES) | |
6989 | { | |
61c3b81d | 6990 | if (tb->deferred) |
6991 | { | |
6992 | gfc_error ("'=> target' is invalid for DEFERRED binding at %C"); | |
6993 | return MATCH_ERROR; | |
6994 | } | |
6995 | ||
7fd88f6e | 6996 | if (!seen_colons) |
6997 | { | |
6998 | gfc_error ("'::' needed in PROCEDURE binding with explicit target" | |
6999 | " at %C"); | |
7000 | return MATCH_ERROR; | |
7001 | } | |
7002 | ||
7003 | m = gfc_match_name (target_buf); | |
7004 | if (m == MATCH_ERROR) | |
7005 | return m; | |
7006 | if (m == MATCH_NO) | |
7007 | { | |
7008 | gfc_error ("Expected binding target after '=>' at %C"); | |
7009 | return MATCH_ERROR; | |
7010 | } | |
7011 | target = target_buf; | |
7012 | } | |
7013 | ||
7014 | /* Now we should have the end. */ | |
7015 | m = gfc_match_eos (); | |
7016 | if (m == MATCH_ERROR) | |
7017 | return m; | |
7018 | if (m == MATCH_NO) | |
7019 | { | |
7020 | gfc_error ("Junk after PROCEDURE declaration at %C"); | |
7021 | return MATCH_ERROR; | |
7022 | } | |
7023 | ||
7024 | /* If no target was found, it has the same name as the binding. */ | |
7025 | if (!target) | |
7026 | target = name; | |
7027 | ||
7028 | /* Get the namespace to insert the symbols into. */ | |
7029 | ns = block->f2k_derived; | |
7030 | gcc_assert (ns); | |
7031 | ||
61c3b81d | 7032 | /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */ |
7033 | if (tb->deferred && !block->attr.abstract) | |
7034 | { | |
7035 | gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT", | |
7036 | block->name); | |
7037 | return MATCH_ERROR; | |
7038 | } | |
7039 | ||
7fd88f6e | 7040 | /* See if we already have a binding with this name in the symtree which would |
e2f06a48 | 7041 | be an error. If a GENERIC already targetted this binding, it may be |
7042 | already there but then typebound is still NULL. */ | |
7fd88f6e | 7043 | stree = gfc_find_symtree (ns->sym_root, name); |
e2f06a48 | 7044 | if (stree && stree->typebound) |
7fd88f6e | 7045 | { |
7046 | gfc_error ("There's already a procedure with binding name '%s' for the" | |
7047 | " derived type '%s' at %C", name, block->name); | |
7048 | return MATCH_ERROR; | |
7049 | } | |
7050 | ||
7051 | /* Insert it and set attributes. */ | |
7052 | if (gfc_get_sym_tree (name, ns, &stree)) | |
7053 | return MATCH_ERROR; | |
e2f06a48 | 7054 | if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific)) |
7fd88f6e | 7055 | return MATCH_ERROR; |
e2f06a48 | 7056 | gfc_set_sym_referenced (tb->u.specific->n.sym); |
7fd88f6e | 7057 | stree->typebound = tb; |
7058 | ||
7059 | return MATCH_YES; | |
7060 | } | |
7061 | ||
7062 | ||
e2f06a48 | 7063 | /* Match a GENERIC procedure binding inside a derived type. */ |
7064 | ||
7065 | match | |
7066 | gfc_match_generic (void) | |
7067 | { | |
7068 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7069 | gfc_symbol* block; | |
7070 | gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */ | |
7071 | gfc_typebound_proc* tb; | |
7072 | gfc_symtree* st; | |
7073 | gfc_namespace* ns; | |
7074 | match m; | |
7075 | ||
7076 | /* Check current state. */ | |
7077 | if (gfc_current_state () == COMP_DERIVED) | |
7078 | { | |
7079 | gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS"); | |
7080 | return MATCH_ERROR; | |
7081 | } | |
7082 | if (gfc_current_state () != COMP_DERIVED_CONTAINS) | |
7083 | return MATCH_NO; | |
7084 | block = gfc_state_stack->previous->sym; | |
7085 | ns = block->f2k_derived; | |
7086 | gcc_assert (block && ns); | |
7087 | ||
7088 | /* See if we get an access-specifier. */ | |
7089 | m = match_binding_attributes (&tbattr, true); | |
7090 | if (m == MATCH_ERROR) | |
7091 | goto error; | |
7092 | ||
7093 | /* Now the colons, those are required. */ | |
7094 | if (gfc_match (" ::") != MATCH_YES) | |
7095 | { | |
7096 | gfc_error ("Expected '::' at %C"); | |
7097 | goto error; | |
7098 | } | |
7099 | ||
7100 | /* The binding name and =>. */ | |
7101 | m = gfc_match (" %n =>", name); | |
7102 | if (m == MATCH_ERROR) | |
7103 | return MATCH_ERROR; | |
7104 | if (m == MATCH_NO) | |
7105 | { | |
7106 | gfc_error ("Expected generic name at %C"); | |
7107 | goto error; | |
7108 | } | |
7109 | ||
7110 | /* If there's already something with this name, check that it is another | |
7111 | GENERIC and then extend that rather than build a new node. */ | |
7112 | st = gfc_find_symtree (ns->sym_root, name); | |
7113 | if (st) | |
7114 | { | |
7115 | if (!st->typebound || !st->typebound->is_generic) | |
7116 | { | |
7117 | gfc_error ("There's already a non-generic procedure with binding name" | |
7118 | " '%s' for the derived type '%s' at %C", | |
7119 | name, block->name); | |
7120 | goto error; | |
7121 | } | |
7122 | ||
7123 | tb = st->typebound; | |
7124 | if (tb->access != tbattr.access) | |
7125 | { | |
7126 | gfc_error ("Binding at %C must have the same access as already" | |
7127 | " defined binding '%s'", name); | |
7128 | goto error; | |
7129 | } | |
7130 | } | |
7131 | else | |
7132 | { | |
7133 | if (gfc_get_sym_tree (name, ns, &st)) | |
7134 | return MATCH_ERROR; | |
7135 | ||
7136 | st->typebound = tb = gfc_get_typebound_proc (); | |
7137 | tb->where = gfc_current_locus; | |
7138 | tb->access = tbattr.access; | |
7139 | tb->is_generic = 1; | |
7140 | tb->u.generic = NULL; | |
7141 | } | |
7142 | ||
7143 | /* Now, match all following names as specific targets. */ | |
7144 | do | |
7145 | { | |
7146 | gfc_symtree* target_st; | |
7147 | gfc_tbp_generic* target; | |
7148 | ||
7149 | m = gfc_match_name (name); | |
7150 | if (m == MATCH_ERROR) | |
7151 | goto error; | |
7152 | if (m == MATCH_NO) | |
7153 | { | |
7154 | gfc_error ("Expected specific binding name at %C"); | |
7155 | goto error; | |
7156 | } | |
7157 | ||
7158 | if (gfc_get_sym_tree (name, ns, &target_st)) | |
7159 | goto error; | |
7160 | ||
7161 | /* See if this is a duplicate specification. */ | |
7162 | for (target = tb->u.generic; target; target = target->next) | |
7163 | if (target_st == target->specific_st) | |
7164 | { | |
7165 | gfc_error ("'%s' already defined as specific binding for the" | |
7166 | " generic '%s' at %C", name, st->n.sym->name); | |
7167 | goto error; | |
7168 | } | |
7169 | ||
7170 | gfc_set_sym_referenced (target_st->n.sym); | |
7171 | ||
7172 | target = gfc_get_tbp_generic (); | |
7173 | target->specific_st = target_st; | |
7174 | target->specific = NULL; | |
7175 | target->next = tb->u.generic; | |
7176 | tb->u.generic = target; | |
7177 | } | |
7178 | while (gfc_match (" ,") == MATCH_YES); | |
7179 | ||
7180 | /* Here should be the end. */ | |
7181 | if (gfc_match_eos () != MATCH_YES) | |
7182 | { | |
7183 | gfc_error ("Junk after GENERIC binding at %C"); | |
7184 | goto error; | |
7185 | } | |
7186 | ||
7187 | return MATCH_YES; | |
7188 | ||
7189 | error: | |
7190 | return MATCH_ERROR; | |
7191 | } | |
7192 | ||
7193 | ||
223f0f57 | 7194 | /* Match a FINAL declaration inside a derived type. */ |
7195 | ||
7196 | match | |
7197 | gfc_match_final_decl (void) | |
7198 | { | |
7199 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7200 | gfc_symbol* sym; | |
7201 | match m; | |
7202 | gfc_namespace* module_ns; | |
7203 | bool first, last; | |
7fd88f6e | 7204 | gfc_symbol* block; |
223f0f57 | 7205 | |
7fd88f6e | 7206 | if (gfc_state_stack->state != COMP_DERIVED_CONTAINS) |
223f0f57 | 7207 | { |
7208 | gfc_error ("FINAL declaration at %C must be inside a derived type " | |
7fd88f6e | 7209 | "CONTAINS section"); |
223f0f57 | 7210 | return MATCH_ERROR; |
7211 | } | |
7212 | ||
7fd88f6e | 7213 | block = gfc_state_stack->previous->sym; |
7214 | gcc_assert (block); | |
223f0f57 | 7215 | |
7fd88f6e | 7216 | if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous |
7217 | || gfc_state_stack->previous->previous->state != COMP_MODULE) | |
223f0f57 | 7218 | { |
7219 | gfc_error ("Derived type declaration with FINAL at %C must be in the" | |
7220 | " specification part of a MODULE"); | |
7221 | return MATCH_ERROR; | |
7222 | } | |
7223 | ||
7224 | module_ns = gfc_current_ns; | |
7225 | gcc_assert (module_ns); | |
7226 | gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE); | |
7227 | ||
7228 | /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */ | |
7229 | if (gfc_match (" ::") == MATCH_ERROR) | |
7230 | return MATCH_ERROR; | |
7231 | ||
7232 | /* Match the sequence of procedure names. */ | |
7233 | first = true; | |
7234 | last = false; | |
7235 | do | |
7236 | { | |
7237 | gfc_finalizer* f; | |
7238 | ||
7239 | if (first && gfc_match_eos () == MATCH_YES) | |
7240 | { | |
7241 | gfc_error ("Empty FINAL at %C"); | |
7242 | return MATCH_ERROR; | |
7243 | } | |
7244 | ||
7245 | m = gfc_match_name (name); | |
7246 | if (m == MATCH_NO) | |
7247 | { | |
7248 | gfc_error ("Expected module procedure name at %C"); | |
7249 | return MATCH_ERROR; | |
7250 | } | |
7251 | else if (m != MATCH_YES) | |
7252 | return MATCH_ERROR; | |
7253 | ||
7254 | if (gfc_match_eos () == MATCH_YES) | |
7255 | last = true; | |
7256 | if (!last && gfc_match_char (',') != MATCH_YES) | |
7257 | { | |
7258 | gfc_error ("Expected ',' at %C"); | |
7259 | return MATCH_ERROR; | |
7260 | } | |
7261 | ||
7262 | if (gfc_get_symbol (name, module_ns, &sym)) | |
7263 | { | |
7264 | gfc_error ("Unknown procedure name \"%s\" at %C", name); | |
7265 | return MATCH_ERROR; | |
7266 | } | |
7267 | ||
7268 | /* Mark the symbol as module procedure. */ | |
7269 | if (sym->attr.proc != PROC_MODULE | |
7270 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
7271 | sym->name, NULL) == FAILURE) | |
7272 | return MATCH_ERROR; | |
7273 | ||
7274 | /* Check if we already have this symbol in the list, this is an error. */ | |
7fd88f6e | 7275 | for (f = block->f2k_derived->finalizers; f; f = f->next) |
e449e4dd | 7276 | if (f->proc_sym == sym) |
223f0f57 | 7277 | { |
7278 | gfc_error ("'%s' at %C is already defined as FINAL procedure!", | |
7279 | name); | |
7280 | return MATCH_ERROR; | |
7281 | } | |
7282 | ||
7283 | /* Add this symbol to the list of finalizers. */ | |
7fd88f6e | 7284 | gcc_assert (block->f2k_derived); |
223f0f57 | 7285 | ++sym->refs; |
48d8ad5a | 7286 | f = XCNEW (gfc_finalizer); |
e449e4dd | 7287 | f->proc_sym = sym; |
7288 | f->proc_tree = NULL; | |
223f0f57 | 7289 | f->where = gfc_current_locus; |
7fd88f6e | 7290 | f->next = block->f2k_derived->finalizers; |
7291 | block->f2k_derived->finalizers = f; | |
223f0f57 | 7292 | |
7293 | first = false; | |
7294 | } | |
7295 | while (!last); | |
7296 | ||
7297 | return MATCH_YES; | |
7298 | } |