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4ee9c684 | 1 | /* Declaration statement matcher |
1a9745d2 | 2 | Copyright (C) 2002, 2004, 2005, 2006, 2007 |
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 | |
36ae04f2 | 28 | /* This flag is set if an old-style length selector is matched |
4ee9c684 | 29 | during a type-declaration statement. */ |
30 | ||
31 | static int old_char_selector; | |
32 | ||
5739e54e | 33 | /* When variables acquire types and attributes from a declaration |
4ee9c684 | 34 | statement, they get them from the following static variables. The |
35 | first part of a declaration sets these variables and the second | |
36 | part copies these into symbol structures. */ | |
37 | ||
38 | static gfc_typespec current_ts; | |
39 | ||
40 | static symbol_attribute current_attr; | |
41 | static gfc_array_spec *current_as; | |
42 | static int colon_seen; | |
43 | ||
c5d33754 | 44 | /* The current binding label (if any). */ |
45 | static char curr_binding_label[GFC_MAX_BINDING_LABEL_LEN + 1]; | |
46 | /* Need to know how many identifiers are on the current data declaration | |
47 | line in case we're given the BIND(C) attribute with a NAME= specifier. */ | |
48 | static int num_idents_on_line; | |
49 | /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we | |
50 | can supply a name if the curr_binding_label is nil and NAME= was not. */ | |
51 | static int has_name_equals = 0; | |
52 | ||
3b6a4b41 | 53 | /* Initializer of the previous enumerator. */ |
54 | ||
55 | static gfc_expr *last_initializer; | |
56 | ||
57 | /* History of all the enumerators is maintained, so that | |
58 | kind values of all the enumerators could be updated depending | |
59 | upon the maximum initialized value. */ | |
60 | ||
61 | typedef struct enumerator_history | |
62 | { | |
63 | gfc_symbol *sym; | |
64 | gfc_expr *initializer; | |
65 | struct enumerator_history *next; | |
66 | } | |
67 | enumerator_history; | |
68 | ||
69 | /* Header of enum history chain. */ | |
70 | ||
71 | static enumerator_history *enum_history = NULL; | |
72 | ||
73 | /* Pointer of enum history node containing largest initializer. */ | |
74 | ||
75 | static enumerator_history *max_enum = NULL; | |
76 | ||
4ee9c684 | 77 | /* gfc_new_block points to the symbol of a newly matched block. */ |
78 | ||
79 | gfc_symbol *gfc_new_block; | |
80 | ||
81 | ||
b4f45d02 | 82 | /********************* DATA statement subroutines *********************/ |
83 | ||
1bfea7e8 | 84 | static bool in_match_data = false; |
85 | ||
86 | bool | |
87 | gfc_in_match_data (void) | |
88 | { | |
89 | return in_match_data; | |
90 | } | |
91 | ||
92 | void | |
93 | gfc_set_in_match_data (bool set_value) | |
94 | { | |
95 | in_match_data = set_value; | |
96 | } | |
97 | ||
b4f45d02 | 98 | /* Free a gfc_data_variable structure and everything beneath it. */ |
99 | ||
100 | static void | |
1a9745d2 | 101 | free_variable (gfc_data_variable *p) |
b4f45d02 | 102 | { |
103 | gfc_data_variable *q; | |
104 | ||
105 | for (; p; p = q) | |
106 | { | |
107 | q = p->next; | |
108 | gfc_free_expr (p->expr); | |
109 | gfc_free_iterator (&p->iter, 0); | |
110 | free_variable (p->list); | |
b4f45d02 | 111 | gfc_free (p); |
112 | } | |
113 | } | |
114 | ||
115 | ||
116 | /* Free a gfc_data_value structure and everything beneath it. */ | |
117 | ||
118 | static void | |
1a9745d2 | 119 | free_value (gfc_data_value *p) |
b4f45d02 | 120 | { |
121 | gfc_data_value *q; | |
122 | ||
123 | for (; p; p = q) | |
124 | { | |
125 | q = p->next; | |
126 | gfc_free_expr (p->expr); | |
127 | gfc_free (p); | |
128 | } | |
129 | } | |
130 | ||
131 | ||
132 | /* Free a list of gfc_data structures. */ | |
133 | ||
134 | void | |
1a9745d2 | 135 | gfc_free_data (gfc_data *p) |
b4f45d02 | 136 | { |
137 | gfc_data *q; | |
138 | ||
139 | for (; p; p = q) | |
140 | { | |
141 | q = p->next; | |
b4f45d02 | 142 | free_variable (p->var); |
143 | free_value (p->value); | |
b4f45d02 | 144 | gfc_free (p); |
145 | } | |
146 | } | |
147 | ||
148 | ||
af29c1f0 | 149 | /* Free all data in a namespace. */ |
1a9745d2 | 150 | |
af29c1f0 | 151 | static void |
f6d0e37a | 152 | gfc_free_data_all (gfc_namespace *ns) |
af29c1f0 | 153 | { |
154 | gfc_data *d; | |
155 | ||
156 | for (;ns->data;) | |
157 | { | |
158 | d = ns->data->next; | |
159 | gfc_free (ns->data); | |
160 | ns->data = d; | |
161 | } | |
162 | } | |
163 | ||
164 | ||
b4f45d02 | 165 | static match var_element (gfc_data_variable *); |
166 | ||
167 | /* Match a list of variables terminated by an iterator and a right | |
168 | parenthesis. */ | |
169 | ||
170 | static match | |
1a9745d2 | 171 | var_list (gfc_data_variable *parent) |
b4f45d02 | 172 | { |
173 | gfc_data_variable *tail, var; | |
174 | match m; | |
175 | ||
176 | m = var_element (&var); | |
177 | if (m == MATCH_ERROR) | |
178 | return MATCH_ERROR; | |
179 | if (m == MATCH_NO) | |
180 | goto syntax; | |
181 | ||
182 | tail = gfc_get_data_variable (); | |
183 | *tail = var; | |
184 | ||
185 | parent->list = tail; | |
186 | ||
187 | for (;;) | |
188 | { | |
189 | if (gfc_match_char (',') != MATCH_YES) | |
190 | goto syntax; | |
191 | ||
192 | m = gfc_match_iterator (&parent->iter, 1); | |
193 | if (m == MATCH_YES) | |
194 | break; | |
195 | if (m == MATCH_ERROR) | |
196 | return MATCH_ERROR; | |
197 | ||
198 | m = var_element (&var); | |
199 | if (m == MATCH_ERROR) | |
200 | return MATCH_ERROR; | |
201 | if (m == MATCH_NO) | |
202 | goto syntax; | |
203 | ||
204 | tail->next = gfc_get_data_variable (); | |
205 | tail = tail->next; | |
206 | ||
207 | *tail = var; | |
208 | } | |
209 | ||
210 | if (gfc_match_char (')') != MATCH_YES) | |
211 | goto syntax; | |
212 | return MATCH_YES; | |
213 | ||
214 | syntax: | |
215 | gfc_syntax_error (ST_DATA); | |
216 | return MATCH_ERROR; | |
217 | } | |
218 | ||
219 | ||
220 | /* Match a single element in a data variable list, which can be a | |
221 | variable-iterator list. */ | |
222 | ||
223 | static match | |
1a9745d2 | 224 | var_element (gfc_data_variable *new) |
b4f45d02 | 225 | { |
226 | match m; | |
227 | gfc_symbol *sym; | |
228 | ||
229 | memset (new, 0, sizeof (gfc_data_variable)); | |
230 | ||
231 | if (gfc_match_char ('(') == MATCH_YES) | |
232 | return var_list (new); | |
233 | ||
234 | m = gfc_match_variable (&new->expr, 0); | |
235 | if (m != MATCH_YES) | |
236 | return m; | |
237 | ||
238 | sym = new->expr->symtree->n.sym; | |
239 | ||
1a9745d2 | 240 | if (!sym->attr.function && gfc_current_ns->parent |
241 | && gfc_current_ns->parent == sym->ns) | |
b4f45d02 | 242 | { |
c8df3e9c | 243 | gfc_error ("Host associated variable '%s' may not be in the DATA " |
7698a624 | 244 | "statement at %C", sym->name); |
b4f45d02 | 245 | return MATCH_ERROR; |
246 | } | |
247 | ||
c8df3e9c | 248 | if (gfc_current_state () != COMP_BLOCK_DATA |
1a9745d2 | 249 | && sym->attr.in_common |
250 | && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of " | |
251 | "common block variable '%s' in DATA statement at %C", | |
252 | sym->name) == FAILURE) | |
c8df3e9c | 253 | return MATCH_ERROR; |
b4f45d02 | 254 | |
950683ed | 255 | if (gfc_add_data (&sym->attr, sym->name, &new->expr->where) == FAILURE) |
b4f45d02 | 256 | return MATCH_ERROR; |
257 | ||
258 | return MATCH_YES; | |
259 | } | |
260 | ||
261 | ||
262 | /* Match the top-level list of data variables. */ | |
263 | ||
264 | static match | |
1a9745d2 | 265 | top_var_list (gfc_data *d) |
b4f45d02 | 266 | { |
267 | gfc_data_variable var, *tail, *new; | |
268 | match m; | |
269 | ||
270 | tail = NULL; | |
271 | ||
272 | for (;;) | |
273 | { | |
274 | m = var_element (&var); | |
275 | if (m == MATCH_NO) | |
276 | goto syntax; | |
277 | if (m == MATCH_ERROR) | |
278 | return MATCH_ERROR; | |
279 | ||
280 | new = gfc_get_data_variable (); | |
281 | *new = var; | |
282 | ||
283 | if (tail == NULL) | |
284 | d->var = new; | |
285 | else | |
286 | tail->next = new; | |
287 | ||
288 | tail = new; | |
289 | ||
290 | if (gfc_match_char ('/') == MATCH_YES) | |
291 | break; | |
292 | if (gfc_match_char (',') != MATCH_YES) | |
293 | goto syntax; | |
294 | } | |
295 | ||
296 | return MATCH_YES; | |
297 | ||
298 | syntax: | |
299 | gfc_syntax_error (ST_DATA); | |
af29c1f0 | 300 | gfc_free_data_all (gfc_current_ns); |
b4f45d02 | 301 | return MATCH_ERROR; |
302 | } | |
303 | ||
304 | ||
305 | static match | |
1a9745d2 | 306 | match_data_constant (gfc_expr **result) |
b4f45d02 | 307 | { |
308 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
309 | gfc_symbol *sym; | |
310 | gfc_expr *expr; | |
311 | match m; | |
096d4ad9 | 312 | locus old_loc; |
b4f45d02 | 313 | |
314 | m = gfc_match_literal_constant (&expr, 1); | |
315 | if (m == MATCH_YES) | |
316 | { | |
317 | *result = expr; | |
318 | return MATCH_YES; | |
319 | } | |
320 | ||
321 | if (m == MATCH_ERROR) | |
322 | return MATCH_ERROR; | |
323 | ||
324 | m = gfc_match_null (result); | |
325 | if (m != MATCH_NO) | |
326 | return m; | |
327 | ||
096d4ad9 | 328 | old_loc = gfc_current_locus; |
329 | ||
330 | /* Should this be a structure component, try to match it | |
331 | before matching a name. */ | |
332 | m = gfc_match_rvalue (result); | |
333 | if (m == MATCH_ERROR) | |
334 | return m; | |
335 | ||
336 | if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE) | |
337 | { | |
338 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
339 | m = MATCH_ERROR; | |
340 | return m; | |
341 | } | |
342 | ||
343 | gfc_current_locus = old_loc; | |
344 | ||
b4f45d02 | 345 | m = gfc_match_name (name); |
346 | if (m != MATCH_YES) | |
347 | return m; | |
348 | ||
349 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
350 | return MATCH_ERROR; | |
351 | ||
352 | if (sym == NULL | |
353 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
354 | { | |
355 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
356 | name); | |
357 | return MATCH_ERROR; | |
358 | } | |
359 | else if (sym->attr.flavor == FL_DERIVED) | |
360 | return gfc_match_structure_constructor (sym, result); | |
361 | ||
362 | *result = gfc_copy_expr (sym->value); | |
363 | return MATCH_YES; | |
364 | } | |
365 | ||
366 | ||
367 | /* Match a list of values in a DATA statement. The leading '/' has | |
368 | already been seen at this point. */ | |
369 | ||
370 | static match | |
1a9745d2 | 371 | top_val_list (gfc_data *data) |
b4f45d02 | 372 | { |
373 | gfc_data_value *new, *tail; | |
374 | gfc_expr *expr; | |
375 | const char *msg; | |
376 | match m; | |
377 | ||
378 | tail = NULL; | |
379 | ||
380 | for (;;) | |
381 | { | |
382 | m = match_data_constant (&expr); | |
383 | if (m == MATCH_NO) | |
384 | goto syntax; | |
385 | if (m == MATCH_ERROR) | |
386 | return MATCH_ERROR; | |
387 | ||
388 | new = gfc_get_data_value (); | |
389 | ||
390 | if (tail == NULL) | |
391 | data->value = new; | |
392 | else | |
393 | tail->next = new; | |
394 | ||
395 | tail = new; | |
396 | ||
397 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
398 | { | |
399 | tail->expr = expr; | |
400 | tail->repeat = 1; | |
401 | } | |
402 | else | |
403 | { | |
404 | signed int tmp; | |
405 | msg = gfc_extract_int (expr, &tmp); | |
406 | gfc_free_expr (expr); | |
407 | if (msg != NULL) | |
408 | { | |
409 | gfc_error (msg); | |
410 | return MATCH_ERROR; | |
411 | } | |
412 | tail->repeat = tmp; | |
413 | ||
414 | m = match_data_constant (&tail->expr); | |
415 | if (m == MATCH_NO) | |
416 | goto syntax; | |
417 | if (m == MATCH_ERROR) | |
418 | return MATCH_ERROR; | |
419 | } | |
420 | ||
421 | if (gfc_match_char ('/') == MATCH_YES) | |
422 | break; | |
423 | if (gfc_match_char (',') == MATCH_NO) | |
424 | goto syntax; | |
425 | } | |
426 | ||
427 | return MATCH_YES; | |
428 | ||
429 | syntax: | |
430 | gfc_syntax_error (ST_DATA); | |
af29c1f0 | 431 | gfc_free_data_all (gfc_current_ns); |
b4f45d02 | 432 | return MATCH_ERROR; |
433 | } | |
434 | ||
435 | ||
436 | /* Matches an old style initialization. */ | |
437 | ||
438 | static match | |
439 | match_old_style_init (const char *name) | |
440 | { | |
441 | match m; | |
442 | gfc_symtree *st; | |
344b937e | 443 | gfc_symbol *sym; |
b4f45d02 | 444 | gfc_data *newdata; |
445 | ||
446 | /* Set up data structure to hold initializers. */ | |
447 | gfc_find_sym_tree (name, NULL, 0, &st); | |
344b937e | 448 | sym = st->n.sym; |
449 | ||
b4f45d02 | 450 | newdata = gfc_get_data (); |
451 | newdata->var = gfc_get_data_variable (); | |
452 | newdata->var->expr = gfc_get_variable_expr (st); | |
5aed5db3 | 453 | newdata->where = gfc_current_locus; |
b4f45d02 | 454 | |
f6d0e37a | 455 | /* Match initial value list. This also eats the terminal '/'. */ |
b4f45d02 | 456 | m = top_val_list (newdata); |
457 | if (m != MATCH_YES) | |
458 | { | |
459 | gfc_free (newdata); | |
460 | return m; | |
461 | } | |
462 | ||
463 | if (gfc_pure (NULL)) | |
464 | { | |
465 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
466 | gfc_free (newdata); | |
467 | return MATCH_ERROR; | |
468 | } | |
469 | ||
344b937e | 470 | /* Mark the variable as having appeared in a data statement. */ |
471 | if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) | |
472 | { | |
473 | gfc_free (newdata); | |
474 | return MATCH_ERROR; | |
475 | } | |
476 | ||
b4f45d02 | 477 | /* Chain in namespace list of DATA initializers. */ |
478 | newdata->next = gfc_current_ns->data; | |
479 | gfc_current_ns->data = newdata; | |
480 | ||
481 | return m; | |
482 | } | |
483 | ||
1a9745d2 | 484 | |
b4f45d02 | 485 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
39fca56b | 486 | we are matching a DATA statement and are therefore issuing an error |
e14bee04 | 487 | if we encounter something unexpected, if not, we're trying to match |
fe06c0d5 | 488 | an old-style initialization expression of the form INTEGER I /2/. */ |
b4f45d02 | 489 | |
490 | match | |
491 | gfc_match_data (void) | |
492 | { | |
493 | gfc_data *new; | |
494 | match m; | |
495 | ||
1bfea7e8 | 496 | gfc_set_in_match_data (true); |
497 | ||
b4f45d02 | 498 | for (;;) |
499 | { | |
500 | new = gfc_get_data (); | |
501 | new->where = gfc_current_locus; | |
502 | ||
503 | m = top_var_list (new); | |
504 | if (m != MATCH_YES) | |
505 | goto cleanup; | |
506 | ||
507 | m = top_val_list (new); | |
508 | if (m != MATCH_YES) | |
509 | goto cleanup; | |
510 | ||
511 | new->next = gfc_current_ns->data; | |
512 | gfc_current_ns->data = new; | |
513 | ||
514 | if (gfc_match_eos () == MATCH_YES) | |
515 | break; | |
516 | ||
517 | gfc_match_char (','); /* Optional comma */ | |
518 | } | |
519 | ||
1bfea7e8 | 520 | gfc_set_in_match_data (false); |
521 | ||
b4f45d02 | 522 | if (gfc_pure (NULL)) |
523 | { | |
524 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
525 | return MATCH_ERROR; | |
526 | } | |
527 | ||
528 | return MATCH_YES; | |
529 | ||
530 | cleanup: | |
1bfea7e8 | 531 | gfc_set_in_match_data (false); |
b4f45d02 | 532 | gfc_free_data (new); |
533 | return MATCH_ERROR; | |
534 | } | |
535 | ||
536 | ||
537 | /************************ Declaration statements *********************/ | |
538 | ||
4ee9c684 | 539 | /* Match an intent specification. Since this can only happen after an |
540 | INTENT word, a legal intent-spec must follow. */ | |
541 | ||
542 | static sym_intent | |
543 | match_intent_spec (void) | |
544 | { | |
545 | ||
546 | if (gfc_match (" ( in out )") == MATCH_YES) | |
547 | return INTENT_INOUT; | |
548 | if (gfc_match (" ( in )") == MATCH_YES) | |
549 | return INTENT_IN; | |
550 | if (gfc_match (" ( out )") == MATCH_YES) | |
551 | return INTENT_OUT; | |
552 | ||
553 | gfc_error ("Bad INTENT specification at %C"); | |
554 | return INTENT_UNKNOWN; | |
555 | } | |
556 | ||
557 | ||
558 | /* Matches a character length specification, which is either a | |
559 | specification expression or a '*'. */ | |
560 | ||
561 | static match | |
1a9745d2 | 562 | char_len_param_value (gfc_expr **expr) |
4ee9c684 | 563 | { |
4ee9c684 | 564 | if (gfc_match_char ('*') == MATCH_YES) |
565 | { | |
566 | *expr = NULL; | |
567 | return MATCH_YES; | |
568 | } | |
569 | ||
570 | return gfc_match_expr (expr); | |
571 | } | |
572 | ||
573 | ||
574 | /* A character length is a '*' followed by a literal integer or a | |
575 | char_len_param_value in parenthesis. */ | |
576 | ||
577 | static match | |
1a9745d2 | 578 | match_char_length (gfc_expr **expr) |
4ee9c684 | 579 | { |
3bd3b616 | 580 | int length; |
4ee9c684 | 581 | match m; |
582 | ||
583 | m = gfc_match_char ('*'); | |
584 | if (m != MATCH_YES) | |
585 | return m; | |
586 | ||
3bd3b616 | 587 | m = gfc_match_small_literal_int (&length, NULL); |
4ee9c684 | 588 | if (m == MATCH_ERROR) |
589 | return m; | |
590 | ||
591 | if (m == MATCH_YES) | |
592 | { | |
593 | *expr = gfc_int_expr (length); | |
594 | return m; | |
595 | } | |
596 | ||
597 | if (gfc_match_char ('(') == MATCH_NO) | |
598 | goto syntax; | |
599 | ||
600 | m = char_len_param_value (expr); | |
601 | if (m == MATCH_ERROR) | |
602 | return m; | |
603 | if (m == MATCH_NO) | |
604 | goto syntax; | |
605 | ||
606 | if (gfc_match_char (')') == MATCH_NO) | |
607 | { | |
608 | gfc_free_expr (*expr); | |
609 | *expr = NULL; | |
610 | goto syntax; | |
611 | } | |
612 | ||
613 | return MATCH_YES; | |
614 | ||
615 | syntax: | |
616 | gfc_error ("Syntax error in character length specification at %C"); | |
617 | return MATCH_ERROR; | |
618 | } | |
619 | ||
620 | ||
ee893be6 | 621 | /* Special subroutine for finding a symbol. Check if the name is found |
622 | in the current name space. If not, and we're compiling a function or | |
623 | subroutine and the parent compilation unit is an interface, then check | |
624 | to see if the name we've been given is the name of the interface | |
625 | (located in another namespace). */ | |
4ee9c684 | 626 | |
627 | static int | |
1a9745d2 | 628 | find_special (const char *name, gfc_symbol **result) |
4ee9c684 | 629 | { |
630 | gfc_state_data *s; | |
ee893be6 | 631 | int i; |
4ee9c684 | 632 | |
ee893be6 | 633 | i = gfc_get_symbol (name, NULL, result); |
e14bee04 | 634 | if (i == 0) |
ee893be6 | 635 | goto end; |
e14bee04 | 636 | |
4ee9c684 | 637 | if (gfc_current_state () != COMP_SUBROUTINE |
638 | && gfc_current_state () != COMP_FUNCTION) | |
ee893be6 | 639 | goto end; |
4ee9c684 | 640 | |
641 | s = gfc_state_stack->previous; | |
642 | if (s == NULL) | |
ee893be6 | 643 | goto end; |
4ee9c684 | 644 | |
645 | if (s->state != COMP_INTERFACE) | |
ee893be6 | 646 | goto end; |
4ee9c684 | 647 | if (s->sym == NULL) |
f6d0e37a | 648 | goto end; /* Nameless interface. */ |
4ee9c684 | 649 | |
650 | if (strcmp (name, s->sym->name) == 0) | |
651 | { | |
652 | *result = s->sym; | |
653 | return 0; | |
654 | } | |
655 | ||
ee893be6 | 656 | end: |
657 | return i; | |
4ee9c684 | 658 | } |
659 | ||
660 | ||
661 | /* Special subroutine for getting a symbol node associated with a | |
662 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
663 | symbol is created in the parent using with symtree node in the | |
664 | child unit pointing to the symbol. If the current namespace has no | |
665 | parent, then the symbol is just created in the current unit. */ | |
666 | ||
667 | static int | |
1a9745d2 | 668 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
4ee9c684 | 669 | { |
670 | gfc_symtree *st; | |
671 | gfc_symbol *sym; | |
672 | int rc; | |
673 | ||
d77f260f | 674 | /* Module functions have to be left in their own namespace because |
675 | they have potentially (almost certainly!) already been referenced. | |
676 | In this sense, they are rather like external functions. This is | |
677 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
678 | space is set to point to the master function, so that the fake | |
679 | result mechanism can work. */ | |
680 | if (module_fcn_entry) | |
861d824f | 681 | { |
682 | /* Present if entry is declared to be a module procedure. */ | |
683 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); | |
c6a05992 | 684 | |
861d824f | 685 | if (*result == NULL) |
686 | rc = gfc_get_symbol (name, NULL, result); | |
c6a05992 | 687 | else if (gfc_get_symbol (name, NULL, &sym) == 0 |
688 | && sym | |
689 | && sym->ts.type != BT_UNKNOWN | |
690 | && (*result)->ts.type == BT_UNKNOWN | |
691 | && sym->attr.flavor == FL_UNKNOWN) | |
692 | /* Pick up the typespec for the entry, if declared in the function | |
693 | body. Note that this symbol is FL_UNKNOWN because it will | |
694 | only have appeared in a type declaration. The local symtree | |
695 | is set to point to the module symbol and a unique symtree | |
696 | to the local version. This latter ensures a correct clearing | |
697 | of the symbols. */ | |
698 | { | |
699 | (*result)->ts = sym->ts; | |
700 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); | |
701 | st->n.sym = *result; | |
702 | st = gfc_get_unique_symtree (gfc_current_ns); | |
703 | st->n.sym = sym; | |
704 | } | |
861d824f | 705 | } |
858f9894 | 706 | else |
707 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
4ee9c684 | 708 | |
858f9894 | 709 | sym = *result; |
c717e399 | 710 | gfc_current_ns->refs++; |
4ee9c684 | 711 | |
858f9894 | 712 | if (sym && !sym->new && gfc_current_state () != COMP_INTERFACE) |
713 | { | |
16f49153 | 714 | /* Trap another encompassed procedure with the same name. All |
715 | these conditions are necessary to avoid picking up an entry | |
716 | whose name clashes with that of the encompassing procedure; | |
717 | this is handled using gsymbols to register unique,globally | |
718 | accessible names. */ | |
858f9894 | 719 | if (sym->attr.flavor != 0 |
1a9745d2 | 720 | && sym->attr.proc != 0 |
721 | && (sym->attr.subroutine || sym->attr.function) | |
722 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
858f9894 | 723 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
724 | name, &sym->declared_at); | |
725 | ||
5720fd2f | 726 | /* Trap a procedure with a name the same as interface in the |
727 | encompassing scope. */ | |
728 | if (sym->attr.generic != 0 | |
db697236 | 729 | && (sym->attr.subroutine || sym->attr.function) |
730 | && !sym->attr.mod_proc) | |
5720fd2f | 731 | gfc_error_now ("Name '%s' at %C is already defined" |
732 | " as a generic interface at %L", | |
733 | name, &sym->declared_at); | |
734 | ||
858f9894 | 735 | /* Trap declarations of attributes in encompassing scope. The |
736 | signature for this is that ts.kind is set. Legitimate | |
737 | references only set ts.type. */ | |
738 | if (sym->ts.kind != 0 | |
1a9745d2 | 739 | && !sym->attr.implicit_type |
740 | && sym->attr.proc == 0 | |
741 | && gfc_current_ns->parent != NULL | |
742 | && sym->attr.access == 0 | |
743 | && !module_fcn_entry) | |
744 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
745 | "and must not have attributes declared at %L", | |
858f9894 | 746 | name, &sym->declared_at); |
747 | } | |
748 | ||
749 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
750 | return rc; | |
4ee9c684 | 751 | |
d77f260f | 752 | /* Module function entries will already have a symtree in |
753 | the current namespace but will need one at module level. */ | |
754 | if (module_fcn_entry) | |
861d824f | 755 | { |
756 | /* Present if entry is declared to be a module procedure. */ | |
757 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); | |
758 | if (st == NULL) | |
759 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
760 | } | |
d77f260f | 761 | else |
762 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
4ee9c684 | 763 | |
4ee9c684 | 764 | st->n.sym = sym; |
765 | sym->refs++; | |
766 | ||
f6d0e37a | 767 | /* See if the procedure should be a module procedure. */ |
4ee9c684 | 768 | |
d77f260f | 769 | if (((sym->ns->proc_name != NULL |
861d824f | 770 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
771 | && sym->attr.proc != PROC_MODULE) | |
772 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) | |
773 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
774 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 775 | rc = 2; |
776 | ||
777 | return rc; | |
778 | } | |
779 | ||
780 | ||
c5d33754 | 781 | /* Verify that the given symbol representing a parameter is C |
782 | interoperable, by checking to see if it was marked as such after | |
783 | its declaration. If the given symbol is not interoperable, a | |
784 | warning is reported, thus removing the need to return the status to | |
785 | the calling function. The standard does not require the user use | |
786 | one of the iso_c_binding named constants to declare an | |
787 | interoperable parameter, but we can't be sure if the param is C | |
788 | interop or not if the user doesn't. For example, integer(4) may be | |
789 | legal Fortran, but doesn't have meaning in C. It may interop with | |
790 | a number of the C types, which causes a problem because the | |
791 | compiler can't know which one. This code is almost certainly not | |
792 | portable, and the user will get what they deserve if the C type | |
793 | across platforms isn't always interoperable with integer(4). If | |
794 | the user had used something like integer(c_int) or integer(c_long), | |
795 | the compiler could have automatically handled the varying sizes | |
796 | across platforms. */ | |
797 | ||
798 | try | |
799 | verify_c_interop_param (gfc_symbol *sym) | |
800 | { | |
801 | int is_c_interop = 0; | |
802 | try retval = SUCCESS; | |
803 | ||
804 | /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). | |
805 | Don't repeat the checks here. */ | |
806 | if (sym->attr.implicit_type) | |
807 | return SUCCESS; | |
808 | ||
809 | /* For subroutines or functions that are passed to a BIND(C) procedure, | |
810 | they're interoperable if they're BIND(C) and their params are all | |
811 | interoperable. */ | |
812 | if (sym->attr.flavor == FL_PROCEDURE) | |
813 | { | |
814 | if (sym->attr.is_bind_c == 0) | |
815 | { | |
816 | gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " | |
817 | "attribute to be C interoperable", sym->name, | |
818 | &(sym->declared_at)); | |
819 | ||
820 | return FAILURE; | |
821 | } | |
822 | else | |
823 | { | |
824 | if (sym->attr.is_c_interop == 1) | |
825 | /* We've already checked this procedure; don't check it again. */ | |
826 | return SUCCESS; | |
827 | else | |
828 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, | |
829 | sym->common_block); | |
830 | } | |
831 | } | |
832 | ||
833 | /* See if we've stored a reference to a procedure that owns sym. */ | |
834 | if (sym->ns != NULL && sym->ns->proc_name != NULL) | |
835 | { | |
836 | if (sym->ns->proc_name->attr.is_bind_c == 1) | |
837 | { | |
838 | is_c_interop = | |
839 | (verify_c_interop (&(sym->ts), sym->name, &(sym->declared_at)) | |
840 | == SUCCESS ? 1 : 0); | |
841 | ||
842 | if (is_c_interop != 1) | |
843 | { | |
844 | /* Make personalized messages to give better feedback. */ | |
845 | if (sym->ts.type == BT_DERIVED) | |
846 | gfc_error ("Type '%s' at %L is a parameter to the BIND(C) " | |
847 | " procedure '%s' but is not C interoperable " | |
848 | "because derived type '%s' is not C interoperable", | |
849 | sym->name, &(sym->declared_at), | |
850 | sym->ns->proc_name->name, | |
851 | sym->ts.derived->name); | |
852 | else | |
853 | gfc_warning ("Variable '%s' at %L is a parameter to the " | |
854 | "BIND(C) procedure '%s' but may not be C " | |
855 | "interoperable", | |
856 | sym->name, &(sym->declared_at), | |
857 | sym->ns->proc_name->name); | |
858 | } | |
e4eda3ec | 859 | |
860 | /* Character strings are only C interoperable if they have a | |
861 | length of 1. */ | |
862 | if (sym->ts.type == BT_CHARACTER) | |
863 | { | |
864 | gfc_charlen *cl = sym->ts.cl; | |
865 | if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT | |
866 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) | |
867 | { | |
868 | gfc_error ("Character argument '%s' at %L " | |
869 | "must be length 1 because " | |
870 | "procedure '%s' is BIND(C)", | |
871 | sym->name, &sym->declared_at, | |
872 | sym->ns->proc_name->name); | |
873 | retval = FAILURE; | |
874 | } | |
875 | } | |
876 | ||
c5d33754 | 877 | /* We have to make sure that any param to a bind(c) routine does |
878 | not have the allocatable, pointer, or optional attributes, | |
879 | according to J3/04-007, section 5.1. */ | |
880 | if (sym->attr.allocatable == 1) | |
881 | { | |
882 | gfc_error ("Variable '%s' at %L cannot have the " | |
883 | "ALLOCATABLE attribute because procedure '%s'" | |
884 | " is BIND(C)", sym->name, &(sym->declared_at), | |
885 | sym->ns->proc_name->name); | |
886 | retval = FAILURE; | |
887 | } | |
888 | ||
889 | if (sym->attr.pointer == 1) | |
890 | { | |
891 | gfc_error ("Variable '%s' at %L cannot have the " | |
892 | "POINTER attribute because procedure '%s'" | |
893 | " is BIND(C)", sym->name, &(sym->declared_at), | |
894 | sym->ns->proc_name->name); | |
895 | retval = FAILURE; | |
896 | } | |
897 | ||
898 | if (sym->attr.optional == 1) | |
899 | { | |
900 | gfc_error ("Variable '%s' at %L cannot have the " | |
901 | "OPTIONAL attribute because procedure '%s'" | |
902 | " is BIND(C)", sym->name, &(sym->declared_at), | |
903 | sym->ns->proc_name->name); | |
904 | retval = FAILURE; | |
905 | } | |
906 | ||
907 | /* Make sure that if it has the dimension attribute, that it is | |
908 | either assumed size or explicit shape. */ | |
909 | if (sym->as != NULL) | |
910 | { | |
911 | if (sym->as->type == AS_ASSUMED_SHAPE) | |
912 | { | |
913 | gfc_error ("Assumed-shape array '%s' at %L cannot be an " | |
914 | "argument to the procedure '%s' at %L because " | |
915 | "the procedure is BIND(C)", sym->name, | |
916 | &(sym->declared_at), sym->ns->proc_name->name, | |
917 | &(sym->ns->proc_name->declared_at)); | |
918 | retval = FAILURE; | |
919 | } | |
920 | ||
921 | if (sym->as->type == AS_DEFERRED) | |
922 | { | |
923 | gfc_error ("Deferred-shape array '%s' at %L cannot be an " | |
924 | "argument to the procedure '%s' at %L because " | |
925 | "the procedure is BIND(C)", sym->name, | |
926 | &(sym->declared_at), sym->ns->proc_name->name, | |
927 | &(sym->ns->proc_name->declared_at)); | |
928 | retval = FAILURE; | |
929 | } | |
930 | } | |
931 | } | |
932 | } | |
933 | ||
934 | return retval; | |
935 | } | |
936 | ||
937 | ||
938 | /* Function called by variable_decl() that adds a name to the symbol table. */ | |
4ee9c684 | 939 | |
940 | static try | |
1a9745d2 | 941 | build_sym (const char *name, gfc_charlen *cl, |
942 | gfc_array_spec **as, locus *var_locus) | |
4ee9c684 | 943 | { |
944 | symbol_attribute attr; | |
945 | gfc_symbol *sym; | |
946 | ||
ee893be6 | 947 | if (gfc_get_symbol (name, NULL, &sym)) |
4ee9c684 | 948 | return FAILURE; |
949 | ||
f6d0e37a | 950 | /* Start updating the symbol table. Add basic type attribute if present. */ |
4ee9c684 | 951 | if (current_ts.type != BT_UNKNOWN |
1a9745d2 | 952 | && (sym->attr.implicit_type == 0 |
953 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
4ee9c684 | 954 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
955 | return FAILURE; | |
956 | ||
957 | if (sym->ts.type == BT_CHARACTER) | |
958 | sym->ts.cl = cl; | |
959 | ||
960 | /* Add dimension attribute if present. */ | |
961 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
962 | return FAILURE; | |
963 | *as = NULL; | |
964 | ||
965 | /* Add attribute to symbol. The copy is so that we can reset the | |
966 | dimension attribute. */ | |
967 | attr = current_attr; | |
968 | attr.dimension = 0; | |
969 | ||
970 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
971 | return FAILURE; | |
972 | ||
c5d33754 | 973 | /* Finish any work that may need to be done for the binding label, |
974 | if it's a bind(c). The bind(c) attr is found before the symbol | |
975 | is made, and before the symbol name (for data decls), so the | |
976 | current_ts is holding the binding label, or nothing if the | |
977 | name= attr wasn't given. Therefore, test here if we're dealing | |
978 | with a bind(c) and make sure the binding label is set correctly. */ | |
979 | if (sym->attr.is_bind_c == 1) | |
980 | { | |
981 | if (sym->binding_label[0] == '\0') | |
982 | { | |
825718f9 | 983 | /* Set the binding label and verify that if a NAME= was specified |
984 | then only one identifier was in the entity-decl-list. */ | |
985 | if (set_binding_label (sym->binding_label, sym->name, | |
986 | num_idents_on_line) == FAILURE) | |
c5d33754 | 987 | return FAILURE; |
988 | } | |
989 | } | |
990 | ||
991 | /* See if we know we're in a common block, and if it's a bind(c) | |
992 | common then we need to make sure we're an interoperable type. */ | |
993 | if (sym->attr.in_common == 1) | |
994 | { | |
995 | /* Test the common block object. */ | |
996 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 | |
997 | && sym->ts.is_c_interop != 1) | |
998 | { | |
999 | gfc_error_now ("Variable '%s' in common block '%s' at %C " | |
1000 | "must be declared with a C interoperable " | |
1001 | "kind since common block '%s' is BIND(C)", | |
1002 | sym->name, sym->common_block->name, | |
1003 | sym->common_block->name); | |
1004 | gfc_clear_error (); | |
1005 | } | |
1006 | } | |
1007 | ||
2457a77e | 1008 | sym->attr.implied_index = 0; |
1009 | ||
4ee9c684 | 1010 | return SUCCESS; |
1011 | } | |
1012 | ||
1a9745d2 | 1013 | |
a270dc8e | 1014 | /* Set character constant to the given length. The constant will be padded or |
1015 | truncated. */ | |
1016 | ||
1017 | void | |
1a9745d2 | 1018 | gfc_set_constant_character_len (int len, gfc_expr *expr, bool array) |
a270dc8e | 1019 | { |
1a9745d2 | 1020 | char *s; |
a270dc8e | 1021 | int slen; |
1022 | ||
1023 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
1024 | gcc_assert (expr->ts.type == BT_CHARACTER && expr->ts.kind == 1); | |
1025 | ||
1026 | slen = expr->value.character.length; | |
1027 | if (len != slen) | |
1028 | { | |
89f528df | 1029 | s = gfc_getmem (len + 1); |
a270dc8e | 1030 | memcpy (s, expr->value.character.string, MIN (len, slen)); |
1031 | if (len > slen) | |
1032 | memset (&s[slen], ' ', len - slen); | |
1bfea7e8 | 1033 | |
1034 | if (gfc_option.warn_character_truncation && slen > len) | |
1035 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
1036 | "(%d/%d)", &expr->where, slen, len); | |
1037 | ||
1038 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
1039 | initializers. */ | |
1040 | if (array && slen < len && !(gfc_option.allow_std & GFC_STD_GNU)) | |
1041 | gfc_error_now ("The CHARACTER elements of the array constructor " | |
1042 | "at %L must have the same length (%d/%d)", | |
1a9745d2 | 1043 | &expr->where, slen, len); |
1bfea7e8 | 1044 | |
89f528df | 1045 | s[len] = '\0'; |
a270dc8e | 1046 | gfc_free (expr->value.character.string); |
1047 | expr->value.character.string = s; | |
1048 | expr->value.character.length = len; | |
1049 | } | |
1050 | } | |
4ee9c684 | 1051 | |
3b6a4b41 | 1052 | |
e14bee04 | 1053 | /* Function to create and update the enumerator history |
3b6a4b41 | 1054 | using the information passed as arguments. |
e14bee04 | 1055 | Pointer "max_enum" is also updated, to point to |
1056 | enum history node containing largest initializer. | |
3b6a4b41 | 1057 | |
1058 | SYM points to the symbol node of enumerator. | |
f6d0e37a | 1059 | INIT points to its enumerator value. */ |
3b6a4b41 | 1060 | |
e14bee04 | 1061 | static void |
1a9745d2 | 1062 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
3b6a4b41 | 1063 | { |
1064 | enumerator_history *new_enum_history; | |
1065 | gcc_assert (sym != NULL && init != NULL); | |
1066 | ||
1067 | new_enum_history = gfc_getmem (sizeof (enumerator_history)); | |
1068 | ||
1069 | new_enum_history->sym = sym; | |
1070 | new_enum_history->initializer = init; | |
1071 | new_enum_history->next = NULL; | |
1072 | ||
1073 | if (enum_history == NULL) | |
1074 | { | |
1075 | enum_history = new_enum_history; | |
1076 | max_enum = enum_history; | |
1077 | } | |
1078 | else | |
1079 | { | |
1080 | new_enum_history->next = enum_history; | |
1081 | enum_history = new_enum_history; | |
1082 | ||
e14bee04 | 1083 | if (mpz_cmp (max_enum->initializer->value.integer, |
3b6a4b41 | 1084 | new_enum_history->initializer->value.integer) < 0) |
1a9745d2 | 1085 | max_enum = new_enum_history; |
3b6a4b41 | 1086 | } |
1087 | } | |
1088 | ||
1089 | ||
e14bee04 | 1090 | /* Function to free enum kind history. */ |
3b6a4b41 | 1091 | |
e14bee04 | 1092 | void |
1a9745d2 | 1093 | gfc_free_enum_history (void) |
3b6a4b41 | 1094 | { |
e14bee04 | 1095 | enumerator_history *current = enum_history; |
1096 | enumerator_history *next; | |
3b6a4b41 | 1097 | |
1098 | while (current != NULL) | |
1099 | { | |
1100 | next = current->next; | |
1101 | gfc_free (current); | |
1102 | current = next; | |
1103 | } | |
1104 | max_enum = NULL; | |
1105 | enum_history = NULL; | |
1106 | } | |
1107 | ||
1108 | ||
4ee9c684 | 1109 | /* Function called by variable_decl() that adds an initialization |
1110 | expression to a symbol. */ | |
1111 | ||
1112 | static try | |
f6d0e37a | 1113 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) |
4ee9c684 | 1114 | { |
1115 | symbol_attribute attr; | |
1116 | gfc_symbol *sym; | |
1117 | gfc_expr *init; | |
1118 | ||
1119 | init = *initp; | |
1120 | if (find_special (name, &sym)) | |
1121 | return FAILURE; | |
1122 | ||
1123 | attr = sym->attr; | |
1124 | ||
1125 | /* If this symbol is confirming an implicit parameter type, | |
1126 | then an initialization expression is not allowed. */ | |
1127 | if (attr.flavor == FL_PARAMETER | |
1128 | && sym->value != NULL | |
1129 | && *initp != NULL) | |
1130 | { | |
1131 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
1132 | sym->name); | |
1133 | return FAILURE; | |
1134 | } | |
1135 | ||
6cbc841e | 1136 | if (attr.in_common |
1137 | && !attr.data | |
1138 | && *initp != NULL) | |
1139 | { | |
1140 | gfc_error ("Initializer not allowed for COMMON variable '%s' at %C", | |
1141 | sym->name); | |
1142 | return FAILURE; | |
1143 | } | |
1144 | ||
4ee9c684 | 1145 | if (init == NULL) |
1146 | { | |
1147 | /* An initializer is required for PARAMETER declarations. */ | |
1148 | if (attr.flavor == FL_PARAMETER) | |
1149 | { | |
1150 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
1151 | return FAILURE; | |
1152 | } | |
1153 | } | |
1154 | else | |
1155 | { | |
1156 | /* If a variable appears in a DATA block, it cannot have an | |
b97f1a18 | 1157 | initializer. */ |
4ee9c684 | 1158 | if (sym->attr.data) |
1159 | { | |
1a9745d2 | 1160 | gfc_error ("Variable '%s' at %C with an initializer already " |
1161 | "appears in a DATA statement", sym->name); | |
4ee9c684 | 1162 | return FAILURE; |
1163 | } | |
1164 | ||
cca3db55 | 1165 | /* Check if the assignment can happen. This has to be put off |
1166 | until later for a derived type variable. */ | |
4ee9c684 | 1167 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
1168 | && gfc_check_assign_symbol (sym, init) == FAILURE) | |
1169 | return FAILURE; | |
1170 | ||
a270dc8e | 1171 | if (sym->ts.type == BT_CHARACTER && sym->ts.cl) |
1172 | { | |
1173 | /* Update symbol character length according initializer. */ | |
1174 | if (sym->ts.cl->length == NULL) | |
1175 | { | |
f6d0e37a | 1176 | /* If there are multiple CHARACTER variables declared on the |
1177 | same line, we don't want them to share the same length. */ | |
ea13b9b7 | 1178 | sym->ts.cl = gfc_get_charlen (); |
1179 | sym->ts.cl->next = gfc_current_ns->cl_list; | |
1180 | gfc_current_ns->cl_list = sym->ts.cl; | |
e9c873a4 | 1181 | |
1182 | if (sym->attr.flavor == FL_PARAMETER | |
1a9745d2 | 1183 | && init->expr_type == EXPR_ARRAY) |
e9c873a4 | 1184 | sym->ts.cl->length = gfc_copy_expr (init->ts.cl->length); |
a270dc8e | 1185 | } |
1186 | /* Update initializer character length according symbol. */ | |
1187 | else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT) | |
1188 | { | |
1189 | int len = mpz_get_si (sym->ts.cl->length->value.integer); | |
1190 | gfc_constructor * p; | |
1191 | ||
1192 | if (init->expr_type == EXPR_CONSTANT) | |
1bfea7e8 | 1193 | gfc_set_constant_character_len (len, init, false); |
a270dc8e | 1194 | else if (init->expr_type == EXPR_ARRAY) |
1195 | { | |
39908fd9 | 1196 | /* Build a new charlen to prevent simplification from |
1197 | deleting the length before it is resolved. */ | |
1198 | init->ts.cl = gfc_get_charlen (); | |
1199 | init->ts.cl->next = gfc_current_ns->cl_list; | |
1200 | gfc_current_ns->cl_list = sym->ts.cl; | |
a270dc8e | 1201 | init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length); |
39908fd9 | 1202 | |
a270dc8e | 1203 | for (p = init->value.constructor; p; p = p->next) |
1bfea7e8 | 1204 | gfc_set_constant_character_len (len, p->expr, false); |
a270dc8e | 1205 | } |
1206 | } | |
1207 | } | |
1208 | ||
c5d33754 | 1209 | /* Need to check if the expression we initialized this |
1210 | to was one of the iso_c_binding named constants. If so, | |
1211 | and we're a parameter (constant), let it be iso_c. | |
1212 | For example: | |
1213 | integer(c_int), parameter :: my_int = c_int | |
1214 | integer(my_int) :: my_int_2 | |
1215 | If we mark my_int as iso_c (since we can see it's value | |
1216 | is equal to one of the named constants), then my_int_2 | |
1217 | will be considered C interoperable. */ | |
1218 | if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) | |
1219 | { | |
1220 | sym->ts.is_iso_c |= init->ts.is_iso_c; | |
1221 | sym->ts.is_c_interop |= init->ts.is_c_interop; | |
1222 | /* attr bits needed for module files. */ | |
1223 | sym->attr.is_iso_c |= init->ts.is_iso_c; | |
1224 | sym->attr.is_c_interop |= init->ts.is_c_interop; | |
1225 | if (init->ts.is_iso_c) | |
1226 | sym->ts.f90_type = init->ts.f90_type; | |
1227 | } | |
1228 | ||
4ee9c684 | 1229 | /* Add initializer. Make sure we keep the ranks sane. */ |
1230 | if (sym->attr.dimension && init->rank == 0) | |
7baa3fb4 | 1231 | { |
1232 | mpz_t size; | |
1233 | gfc_expr *array; | |
1234 | gfc_constructor *c; | |
1235 | int n; | |
1236 | if (sym->attr.flavor == FL_PARAMETER | |
1237 | && init->expr_type == EXPR_CONSTANT | |
1238 | && spec_size (sym->as, &size) == SUCCESS | |
1239 | && mpz_cmp_si (size, 0) > 0) | |
1240 | { | |
1241 | array = gfc_start_constructor (init->ts.type, init->ts.kind, | |
1242 | &init->where); | |
1243 | ||
1244 | array->value.constructor = c = NULL; | |
1245 | for (n = 0; n < (int)mpz_get_si (size); n++) | |
1246 | { | |
1247 | if (array->value.constructor == NULL) | |
1248 | { | |
1249 | array->value.constructor = c = gfc_get_constructor (); | |
1250 | c->expr = init; | |
1251 | } | |
1252 | else | |
1253 | { | |
1254 | c->next = gfc_get_constructor (); | |
1255 | c = c->next; | |
1256 | c->expr = gfc_copy_expr (init); | |
1257 | } | |
1258 | } | |
1259 | ||
1260 | array->shape = gfc_get_shape (sym->as->rank); | |
1261 | for (n = 0; n < sym->as->rank; n++) | |
1262 | spec_dimen_size (sym->as, n, &array->shape[n]); | |
1263 | ||
1264 | init = array; | |
1265 | mpz_clear (size); | |
1266 | } | |
1267 | init->rank = sym->as->rank; | |
1268 | } | |
4ee9c684 | 1269 | |
1270 | sym->value = init; | |
3cd3c667 | 1271 | if (sym->attr.save == SAVE_NONE) |
1272 | sym->attr.save = SAVE_IMPLICIT; | |
4ee9c684 | 1273 | *initp = NULL; |
1274 | } | |
1275 | ||
1276 | return SUCCESS; | |
1277 | } | |
1278 | ||
1279 | ||
1280 | /* Function called by variable_decl() that adds a name to a structure | |
1281 | being built. */ | |
1282 | ||
1283 | static try | |
1a9745d2 | 1284 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
1285 | gfc_array_spec **as) | |
4ee9c684 | 1286 | { |
1287 | gfc_component *c; | |
1288 | ||
1289 | /* If the current symbol is of the same derived type that we're | |
1290 | constructing, it must have the pointer attribute. */ | |
1291 | if (current_ts.type == BT_DERIVED | |
1292 | && current_ts.derived == gfc_current_block () | |
1293 | && current_attr.pointer == 0) | |
1294 | { | |
1295 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1296 | return FAILURE; | |
1297 | } | |
1298 | ||
1a9745d2 | 1299 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
4ee9c684 | 1300 | { |
1301 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1302 | { | |
1303 | gfc_error ("Array component of structure at %C must have explicit " | |
1304 | "or deferred shape"); | |
1305 | return FAILURE; | |
1306 | } | |
1307 | } | |
1308 | ||
1309 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1310 | return FAILURE; | |
1311 | ||
1312 | c->ts = current_ts; | |
1313 | c->ts.cl = cl; | |
1314 | gfc_set_component_attr (c, ¤t_attr); | |
1315 | ||
1316 | c->initializer = *init; | |
1317 | *init = NULL; | |
1318 | ||
1319 | c->as = *as; | |
1320 | if (c->as != NULL) | |
1321 | c->dimension = 1; | |
1322 | *as = NULL; | |
1323 | ||
1324 | /* Check array components. */ | |
1325 | if (!c->dimension) | |
2294b616 | 1326 | { |
1327 | if (c->allocatable) | |
1328 | { | |
1329 | gfc_error ("Allocatable component at %C must be an array"); | |
1330 | return FAILURE; | |
1331 | } | |
1332 | else | |
1333 | return SUCCESS; | |
1334 | } | |
4ee9c684 | 1335 | |
1336 | if (c->pointer) | |
1337 | { | |
1338 | if (c->as->type != AS_DEFERRED) | |
1339 | { | |
2294b616 | 1340 | gfc_error ("Pointer array component of structure at %C must have a " |
1341 | "deferred shape"); | |
1342 | return FAILURE; | |
1343 | } | |
1344 | } | |
1345 | else if (c->allocatable) | |
1346 | { | |
1347 | if (c->as->type != AS_DEFERRED) | |
1348 | { | |
1349 | gfc_error ("Allocatable component of structure at %C must have a " | |
1350 | "deferred shape"); | |
4ee9c684 | 1351 | return FAILURE; |
1352 | } | |
1353 | } | |
1354 | else | |
1355 | { | |
1356 | if (c->as->type != AS_EXPLICIT) | |
1357 | { | |
1a9745d2 | 1358 | gfc_error ("Array component of structure at %C must have an " |
1359 | "explicit shape"); | |
4ee9c684 | 1360 | return FAILURE; |
1361 | } | |
1362 | } | |
1363 | ||
1364 | return SUCCESS; | |
1365 | } | |
1366 | ||
1367 | ||
1368 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1369 | ||
1370 | match | |
1a9745d2 | 1371 | gfc_match_null (gfc_expr **result) |
4ee9c684 | 1372 | { |
1373 | gfc_symbol *sym; | |
1374 | gfc_expr *e; | |
1375 | match m; | |
1376 | ||
1377 | m = gfc_match (" null ( )"); | |
1378 | if (m != MATCH_YES) | |
1379 | return m; | |
1380 | ||
1381 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1382 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1383 | { | |
1384 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1385 | return MATCH_ERROR; | |
1386 | } | |
1387 | ||
1388 | gfc_intrinsic_symbol (sym); | |
1389 | ||
1390 | if (sym->attr.proc != PROC_INTRINSIC | |
950683ed | 1391 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1392 | sym->name, NULL) == FAILURE | |
1393 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
4ee9c684 | 1394 | return MATCH_ERROR; |
1395 | ||
1396 | e = gfc_get_expr (); | |
cbb9e6aa | 1397 | e->where = gfc_current_locus; |
4ee9c684 | 1398 | e->expr_type = EXPR_NULL; |
1399 | e->ts.type = BT_UNKNOWN; | |
1400 | ||
1401 | *result = e; | |
1402 | ||
1403 | return MATCH_YES; | |
1404 | } | |
1405 | ||
1406 | ||
4ee9c684 | 1407 | /* Match a variable name with an optional initializer. When this |
1408 | subroutine is called, a variable is expected to be parsed next. | |
1409 | Depending on what is happening at the moment, updates either the | |
1410 | symbol table or the current interface. */ | |
1411 | ||
1412 | static match | |
3923b69f | 1413 | variable_decl (int elem) |
4ee9c684 | 1414 | { |
1415 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1416 | gfc_expr *initializer, *char_len; | |
1417 | gfc_array_spec *as; | |
b549d2a5 | 1418 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
4ee9c684 | 1419 | gfc_charlen *cl; |
1420 | locus var_locus; | |
1421 | match m; | |
1422 | try t; | |
b549d2a5 | 1423 | gfc_symbol *sym; |
3b6a4b41 | 1424 | locus old_locus; |
4ee9c684 | 1425 | |
1426 | initializer = NULL; | |
1427 | as = NULL; | |
b549d2a5 | 1428 | cp_as = NULL; |
3b6a4b41 | 1429 | old_locus = gfc_current_locus; |
4ee9c684 | 1430 | |
1431 | /* When we get here, we've just matched a list of attributes and | |
1432 | maybe a type and a double colon. The next thing we expect to see | |
1433 | is the name of the symbol. */ | |
1434 | m = gfc_match_name (name); | |
1435 | if (m != MATCH_YES) | |
1436 | goto cleanup; | |
1437 | ||
cbb9e6aa | 1438 | var_locus = gfc_current_locus; |
4ee9c684 | 1439 | |
1440 | /* Now we could see the optional array spec. or character length. */ | |
1441 | m = gfc_match_array_spec (&as); | |
b549d2a5 | 1442 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1443 | cp_as = gfc_copy_array_spec (as); | |
1444 | else if (m == MATCH_ERROR) | |
4ee9c684 | 1445 | goto cleanup; |
3b6a4b41 | 1446 | |
4ee9c684 | 1447 | if (m == MATCH_NO) |
1448 | as = gfc_copy_array_spec (current_as); | |
1449 | ||
1450 | char_len = NULL; | |
1451 | cl = NULL; | |
1452 | ||
1453 | if (current_ts.type == BT_CHARACTER) | |
1454 | { | |
1455 | switch (match_char_length (&char_len)) | |
1456 | { | |
1457 | case MATCH_YES: | |
1458 | cl = gfc_get_charlen (); | |
1459 | cl->next = gfc_current_ns->cl_list; | |
1460 | gfc_current_ns->cl_list = cl; | |
1461 | ||
1462 | cl->length = char_len; | |
1463 | break; | |
1464 | ||
3923b69f | 1465 | /* Non-constant lengths need to be copied after the first |
04b61f60 | 1466 | element. Also copy assumed lengths. */ |
4ee9c684 | 1467 | case MATCH_NO: |
04b61f60 | 1468 | if (elem > 1 |
1469 | && (current_ts.cl->length == NULL | |
1470 | || current_ts.cl->length->expr_type != EXPR_CONSTANT)) | |
3923b69f | 1471 | { |
1472 | cl = gfc_get_charlen (); | |
1473 | cl->next = gfc_current_ns->cl_list; | |
1474 | gfc_current_ns->cl_list = cl; | |
1475 | cl->length = gfc_copy_expr (current_ts.cl->length); | |
1476 | } | |
1477 | else | |
1478 | cl = current_ts.cl; | |
1479 | ||
4ee9c684 | 1480 | break; |
1481 | ||
1482 | case MATCH_ERROR: | |
1483 | goto cleanup; | |
1484 | } | |
1485 | } | |
1486 | ||
b549d2a5 | 1487 | /* If this symbol has already shown up in a Cray Pointer declaration, |
f6d0e37a | 1488 | then we want to set the type & bail out. */ |
b549d2a5 | 1489 | if (gfc_option.flag_cray_pointer) |
1490 | { | |
1491 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1492 | if (sym != NULL && sym->attr.cray_pointee) | |
1493 | { | |
1494 | sym->ts.type = current_ts.type; | |
1495 | sym->ts.kind = current_ts.kind; | |
1496 | sym->ts.cl = cl; | |
1497 | sym->ts.derived = current_ts.derived; | |
c5d33754 | 1498 | sym->ts.is_c_interop = current_ts.is_c_interop; |
1499 | sym->ts.is_iso_c = current_ts.is_iso_c; | |
b549d2a5 | 1500 | m = MATCH_YES; |
1501 | ||
1502 | /* Check to see if we have an array specification. */ | |
1503 | if (cp_as != NULL) | |
1504 | { | |
1505 | if (sym->as != NULL) | |
1506 | { | |
7698a624 | 1507 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 1508 | gfc_free_array_spec (cp_as); |
1509 | m = MATCH_ERROR; | |
1510 | goto cleanup; | |
1511 | } | |
1512 | else | |
1513 | { | |
1514 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1515 | gfc_internal_error ("Couldn't set pointee array spec."); | |
e14bee04 | 1516 | |
b549d2a5 | 1517 | /* Fix the array spec. */ |
e14bee04 | 1518 | m = gfc_mod_pointee_as (sym->as); |
b549d2a5 | 1519 | if (m == MATCH_ERROR) |
1520 | goto cleanup; | |
1521 | } | |
e14bee04 | 1522 | } |
b549d2a5 | 1523 | goto cleanup; |
1524 | } | |
1525 | else | |
1526 | { | |
1527 | gfc_free_array_spec (cp_as); | |
1528 | } | |
1529 | } | |
e14bee04 | 1530 | |
1531 | ||
4ee9c684 | 1532 | /* OK, we've successfully matched the declaration. Now put the |
1533 | symbol in the current namespace, because it might be used in the | |
fe06c0d5 | 1534 | optional initialization expression for this symbol, e.g. this is |
4ee9c684 | 1535 | perfectly legal: |
1536 | ||
1537 | integer, parameter :: i = huge(i) | |
1538 | ||
1539 | This is only true for parameters or variables of a basic type. | |
1540 | For components of derived types, it is not true, so we don't | |
1541 | create a symbol for those yet. If we fail to create the symbol, | |
1542 | bail out. */ | |
1543 | if (gfc_current_state () != COMP_DERIVED | |
1544 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1545 | { | |
b8a51d79 | 1546 | m = MATCH_ERROR; |
1547 | goto cleanup; | |
1548 | } | |
1549 | ||
60fbbf9e | 1550 | /* An interface body specifies all of the procedure's |
1551 | characteristics and these shall be consistent with those | |
1552 | specified in the procedure definition, except that the interface | |
1553 | may specify a procedure that is not pure if the procedure is | |
1554 | defined to be pure(12.3.2). */ | |
b8a51d79 | 1555 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1556 | && gfc_current_ns->proc_name |
1557 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
c723595c | 1558 | && current_ts.derived->ns != gfc_current_ns) |
1559 | { | |
1560 | gfc_symtree *st; | |
1561 | st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.derived->name); | |
1562 | if (!(current_ts.derived->attr.imported | |
1563 | && st != NULL | |
1564 | && st->n.sym == current_ts.derived) | |
1565 | && !gfc_current_ns->has_import_set) | |
1566 | { | |
1567 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1568 | "interface", name); | |
1569 | m = MATCH_ERROR; | |
1570 | goto cleanup; | |
1571 | } | |
4ee9c684 | 1572 | } |
1573 | ||
1574 | /* In functions that have a RESULT variable defined, the function | |
1575 | name always refers to function calls. Therefore, the name is | |
1576 | not allowed to appear in specification statements. */ | |
1577 | if (gfc_current_state () == COMP_FUNCTION | |
1578 | && gfc_current_block () != NULL | |
1579 | && gfc_current_block ()->result != NULL | |
1580 | && gfc_current_block ()->result != gfc_current_block () | |
1581 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1582 | { | |
1583 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1584 | m = MATCH_ERROR; | |
1585 | goto cleanup; | |
1586 | } | |
1587 | ||
b4f45d02 | 1588 | /* We allow old-style initializations of the form |
1589 | integer i /2/, j(4) /3*3, 1/ | |
1590 | (if no colon has been seen). These are different from data | |
1591 | statements in that initializers are only allowed to apply to the | |
1592 | variable immediately preceding, i.e. | |
1593 | integer i, j /1, 2/ | |
1594 | is not allowed. Therefore we have to do some work manually, that | |
cca3db55 | 1595 | could otherwise be left to the matchers for DATA statements. */ |
b4f45d02 | 1596 | |
1597 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1598 | { | |
1599 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1600 | "initialization at %C") == FAILURE) | |
1601 | return MATCH_ERROR; | |
e14bee04 | 1602 | |
b4f45d02 | 1603 | return match_old_style_init (name); |
1604 | } | |
1605 | ||
4ee9c684 | 1606 | /* The double colon must be present in order to have initializers. |
1607 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1608 | if (colon_seen) | |
1609 | { | |
1610 | if (gfc_match (" =>") == MATCH_YES) | |
1611 | { | |
4ee9c684 | 1612 | if (!current_attr.pointer) |
1613 | { | |
1614 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1615 | m = MATCH_ERROR; | |
1616 | goto cleanup; | |
1617 | } | |
1618 | ||
1619 | m = gfc_match_null (&initializer); | |
1620 | if (m == MATCH_NO) | |
1621 | { | |
e4789c62 | 1622 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
4ee9c684 | 1623 | m = MATCH_ERROR; |
1624 | } | |
1625 | ||
1626 | if (gfc_pure (NULL)) | |
1627 | { | |
1a9745d2 | 1628 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1629 | "a PURE procedure"); | |
4ee9c684 | 1630 | m = MATCH_ERROR; |
1631 | } | |
1632 | ||
1633 | if (m != MATCH_YES) | |
1634 | goto cleanup; | |
1635 | ||
4ee9c684 | 1636 | } |
1637 | else if (gfc_match_char ('=') == MATCH_YES) | |
1638 | { | |
1639 | if (current_attr.pointer) | |
1640 | { | |
1a9745d2 | 1641 | gfc_error ("Pointer initialization at %C requires '=>', " |
1642 | "not '='"); | |
4ee9c684 | 1643 | m = MATCH_ERROR; |
1644 | goto cleanup; | |
1645 | } | |
1646 | ||
1647 | m = gfc_match_init_expr (&initializer); | |
1648 | if (m == MATCH_NO) | |
1649 | { | |
1650 | gfc_error ("Expected an initialization expression at %C"); | |
1651 | m = MATCH_ERROR; | |
1652 | } | |
1653 | ||
1654 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1655 | { | |
1a9745d2 | 1656 | gfc_error ("Initialization of variable at %C is not allowed in " |
1657 | "a PURE procedure"); | |
4ee9c684 | 1658 | m = MATCH_ERROR; |
1659 | } | |
1660 | ||
1661 | if (m != MATCH_YES) | |
1662 | goto cleanup; | |
1663 | } | |
8ffad0f9 | 1664 | } |
1665 | ||
2294b616 | 1666 | if (initializer != NULL && current_attr.allocatable |
1667 | && gfc_current_state () == COMP_DERIVED) | |
1668 | { | |
1a9745d2 | 1669 | gfc_error ("Initialization of allocatable component at %C is not " |
1670 | "allowed"); | |
2294b616 | 1671 | m = MATCH_ERROR; |
1672 | goto cleanup; | |
1673 | } | |
1674 | ||
d9b3f26b | 1675 | /* Add the initializer. Note that it is fine if initializer is |
4ee9c684 | 1676 | NULL here, because we sometimes also need to check if a |
1677 | declaration *must* have an initialization expression. */ | |
1678 | if (gfc_current_state () != COMP_DERIVED) | |
1679 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1680 | else | |
d9b3f26b | 1681 | { |
2294b616 | 1682 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1683 | && !current_attr.pointer && !initializer) |
d9b3f26b | 1684 | initializer = gfc_default_initializer (¤t_ts); |
1685 | t = build_struct (name, cl, &initializer, &as); | |
1686 | } | |
4ee9c684 | 1687 | |
1688 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1689 | ||
1690 | cleanup: | |
1691 | /* Free stuff up and return. */ | |
1692 | gfc_free_expr (initializer); | |
1693 | gfc_free_array_spec (as); | |
1694 | ||
1695 | return m; | |
1696 | } | |
1697 | ||
1698 | ||
d10f89ee | 1699 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
1700 | This assumes that the byte size is equal to the kind number for | |
1701 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
4ee9c684 | 1702 | |
1703 | match | |
1a9745d2 | 1704 | gfc_match_old_kind_spec (gfc_typespec *ts) |
4ee9c684 | 1705 | { |
1706 | match m; | |
3bd3b616 | 1707 | int original_kind; |
4ee9c684 | 1708 | |
1709 | if (gfc_match_char ('*') != MATCH_YES) | |
1710 | return MATCH_NO; | |
1711 | ||
3bd3b616 | 1712 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
4ee9c684 | 1713 | if (m != MATCH_YES) |
1714 | return MATCH_ERROR; | |
1715 | ||
b118a35b | 1716 | original_kind = ts->kind; |
1717 | ||
4ee9c684 | 1718 | /* Massage the kind numbers for complex types. */ |
b118a35b | 1719 | if (ts->type == BT_COMPLEX) |
1720 | { | |
1721 | if (ts->kind % 2) | |
1a9745d2 | 1722 | { |
1723 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1724 | gfc_basic_typename (ts->type), original_kind); | |
1725 | return MATCH_ERROR; | |
1726 | } | |
b118a35b | 1727 | ts->kind /= 2; |
1728 | } | |
4ee9c684 | 1729 | |
f2d4ef3b | 1730 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1731 | { |
b118a35b | 1732 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
1a9745d2 | 1733 | gfc_basic_typename (ts->type), original_kind); |
4ee9c684 | 1734 | return MATCH_ERROR; |
1735 | } | |
1736 | ||
be7f01a1 | 1737 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
1738 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1739 | return MATCH_ERROR; | |
1740 | ||
4ee9c684 | 1741 | return MATCH_YES; |
1742 | } | |
1743 | ||
1744 | ||
1745 | /* Match a kind specification. Since kinds are generally optional, we | |
1746 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1747 | string is found, then we know we have an error. */ | |
1748 | ||
1749 | match | |
1a9745d2 | 1750 | gfc_match_kind_spec (gfc_typespec *ts) |
4ee9c684 | 1751 | { |
1752 | locus where; | |
1753 | gfc_expr *e; | |
1754 | match m, n; | |
1755 | const char *msg; | |
1756 | ||
1757 | m = MATCH_NO; | |
1758 | e = NULL; | |
1759 | ||
cbb9e6aa | 1760 | where = gfc_current_locus; |
4ee9c684 | 1761 | |
1762 | if (gfc_match_char ('(') == MATCH_NO) | |
1763 | return MATCH_NO; | |
1764 | ||
1765 | /* Also gobbles optional text. */ | |
1766 | if (gfc_match (" kind = ") == MATCH_YES) | |
1767 | m = MATCH_ERROR; | |
1768 | ||
1769 | n = gfc_match_init_expr (&e); | |
1770 | if (n == MATCH_NO) | |
1771 | gfc_error ("Expected initialization expression at %C"); | |
1772 | if (n != MATCH_YES) | |
1773 | return MATCH_ERROR; | |
1774 | ||
1775 | if (e->rank != 0) | |
1776 | { | |
1777 | gfc_error ("Expected scalar initialization expression at %C"); | |
1778 | m = MATCH_ERROR; | |
1779 | goto no_match; | |
1780 | } | |
1781 | ||
1782 | msg = gfc_extract_int (e, &ts->kind); | |
1783 | if (msg != NULL) | |
1784 | { | |
1785 | gfc_error (msg); | |
1786 | m = MATCH_ERROR; | |
1787 | goto no_match; | |
1788 | } | |
1789 | ||
c5d33754 | 1790 | /* Before throwing away the expression, let's see if we had a |
1791 | C interoperable kind (and store the fact). */ | |
1792 | if (e->ts.is_c_interop == 1) | |
1793 | { | |
1794 | /* Mark this as c interoperable if being declared with one | |
1795 | of the named constants from iso_c_binding. */ | |
1796 | ts->is_c_interop = e->ts.is_iso_c; | |
1797 | ts->f90_type = e->ts.f90_type; | |
1798 | } | |
1799 | ||
4ee9c684 | 1800 | gfc_free_expr (e); |
1801 | e = NULL; | |
1802 | ||
c5d33754 | 1803 | /* Ignore errors to this point, if we've gotten here. This means |
1804 | we ignore the m=MATCH_ERROR from above. */ | |
f2d4ef3b | 1805 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1806 | { |
1807 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
1808 | gfc_basic_typename (ts->type)); | |
4ee9c684 | 1809 | m = MATCH_ERROR; |
4ee9c684 | 1810 | } |
c5d33754 | 1811 | else if (gfc_match_char (')') != MATCH_YES) |
4ee9c684 | 1812 | { |
d67fc9ae | 1813 | gfc_error ("Missing right parenthesis at %C"); |
c5d33754 | 1814 | m = MATCH_ERROR; |
4ee9c684 | 1815 | } |
c5d33754 | 1816 | else |
1817 | /* All tests passed. */ | |
1818 | m = MATCH_YES; | |
4ee9c684 | 1819 | |
c5d33754 | 1820 | if(m == MATCH_ERROR) |
1821 | gfc_current_locus = where; | |
1822 | ||
1823 | /* Return what we know from the test(s). */ | |
1824 | return m; | |
4ee9c684 | 1825 | |
1826 | no_match: | |
1827 | gfc_free_expr (e); | |
cbb9e6aa | 1828 | gfc_current_locus = where; |
4ee9c684 | 1829 | return m; |
1830 | } | |
1831 | ||
1832 | ||
1833 | /* Match the various kind/length specifications in a CHARACTER | |
1834 | declaration. We don't return MATCH_NO. */ | |
1835 | ||
1836 | static match | |
1a9745d2 | 1837 | match_char_spec (gfc_typespec *ts) |
4ee9c684 | 1838 | { |
2fe2caa6 | 1839 | int kind, seen_length; |
4ee9c684 | 1840 | gfc_charlen *cl; |
1841 | gfc_expr *len; | |
1842 | match m; | |
c5d33754 | 1843 | gfc_expr *kind_expr = NULL; |
b8a891cb | 1844 | kind = gfc_default_character_kind; |
4ee9c684 | 1845 | len = NULL; |
1846 | seen_length = 0; | |
1847 | ||
1848 | /* Try the old-style specification first. */ | |
1849 | old_char_selector = 0; | |
1850 | ||
1851 | m = match_char_length (&len); | |
1852 | if (m != MATCH_NO) | |
1853 | { | |
1854 | if (m == MATCH_YES) | |
1855 | old_char_selector = 1; | |
1856 | seen_length = 1; | |
1857 | goto done; | |
1858 | } | |
1859 | ||
1860 | m = gfc_match_char ('('); | |
1861 | if (m != MATCH_YES) | |
1862 | { | |
c5d33754 | 1863 | m = MATCH_YES; /* Character without length is a single char. */ |
4ee9c684 | 1864 | goto done; |
1865 | } | |
1866 | ||
c5d33754 | 1867 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ |
4ee9c684 | 1868 | if (gfc_match (" kind =") == MATCH_YES) |
1869 | { | |
c5d33754 | 1870 | m = gfc_match_small_int_expr(&kind, &kind_expr); |
1871 | ||
4ee9c684 | 1872 | if (m == MATCH_ERROR) |
1873 | goto done; | |
1874 | if (m == MATCH_NO) | |
1875 | goto syntax; | |
1876 | ||
1877 | if (gfc_match (" , len =") == MATCH_NO) | |
1878 | goto rparen; | |
1879 | ||
1880 | m = char_len_param_value (&len); | |
1881 | if (m == MATCH_NO) | |
1882 | goto syntax; | |
1883 | if (m == MATCH_ERROR) | |
1884 | goto done; | |
1885 | seen_length = 1; | |
1886 | ||
1887 | goto rparen; | |
1888 | } | |
1889 | ||
f6d0e37a | 1890 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ |
4ee9c684 | 1891 | if (gfc_match (" len =") == MATCH_YES) |
1892 | { | |
1893 | m = char_len_param_value (&len); | |
1894 | if (m == MATCH_NO) | |
1895 | goto syntax; | |
1896 | if (m == MATCH_ERROR) | |
1897 | goto done; | |
1898 | seen_length = 1; | |
1899 | ||
1900 | if (gfc_match_char (')') == MATCH_YES) | |
1901 | goto done; | |
1902 | ||
1903 | if (gfc_match (" , kind =") != MATCH_YES) | |
1904 | goto syntax; | |
1905 | ||
c5d33754 | 1906 | gfc_match_small_int_expr(&kind, &kind_expr); |
4ee9c684 | 1907 | |
f2d4ef3b | 1908 | if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
4ee9c684 | 1909 | { |
1910 | gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); | |
1911 | return MATCH_YES; | |
1912 | } | |
1913 | ||
1914 | goto rparen; | |
1915 | } | |
1916 | ||
f6d0e37a | 1917 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
4ee9c684 | 1918 | m = char_len_param_value (&len); |
1919 | if (m == MATCH_NO) | |
1920 | goto syntax; | |
1921 | if (m == MATCH_ERROR) | |
1922 | goto done; | |
1923 | seen_length = 1; | |
1924 | ||
1925 | m = gfc_match_char (')'); | |
1926 | if (m == MATCH_YES) | |
1927 | goto done; | |
1928 | ||
1929 | if (gfc_match_char (',') != MATCH_YES) | |
1930 | goto syntax; | |
1931 | ||
c5d33754 | 1932 | gfc_match (" kind ="); /* Gobble optional text. */ |
4ee9c684 | 1933 | |
c5d33754 | 1934 | m = gfc_match_small_int_expr(&kind, &kind_expr); |
4ee9c684 | 1935 | if (m == MATCH_ERROR) |
1936 | goto done; | |
1937 | if (m == MATCH_NO) | |
1938 | goto syntax; | |
1939 | ||
1940 | rparen: | |
1941 | /* Require a right-paren at this point. */ | |
1942 | m = gfc_match_char (')'); | |
1943 | if (m == MATCH_YES) | |
1944 | goto done; | |
1945 | ||
1946 | syntax: | |
1947 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
1948 | m = MATCH_ERROR; | |
a3cbe8cc | 1949 | gfc_free_expr (len); |
1950 | return m; | |
4ee9c684 | 1951 | |
1952 | done: | |
a3cbe8cc | 1953 | if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
4ee9c684 | 1954 | { |
1955 | gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); | |
1956 | m = MATCH_ERROR; | |
1957 | } | |
1958 | ||
a3cbe8cc | 1959 | if (seen_length == 1 && len != NULL |
1960 | && len->ts.type != BT_INTEGER && len->ts.type != BT_UNKNOWN) | |
1961 | { | |
1962 | gfc_error ("Expression at %C must be of INTEGER type"); | |
1963 | m = MATCH_ERROR; | |
1964 | } | |
1965 | ||
4ee9c684 | 1966 | if (m != MATCH_YES) |
1967 | { | |
1968 | gfc_free_expr (len); | |
c5d33754 | 1969 | gfc_free_expr (kind_expr); |
4ee9c684 | 1970 | return m; |
1971 | } | |
1972 | ||
1973 | /* Do some final massaging of the length values. */ | |
1974 | cl = gfc_get_charlen (); | |
1975 | cl->next = gfc_current_ns->cl_list; | |
1976 | gfc_current_ns->cl_list = cl; | |
1977 | ||
1978 | if (seen_length == 0) | |
1979 | cl->length = gfc_int_expr (1); | |
1980 | else | |
2fe2caa6 | 1981 | cl->length = len; |
4ee9c684 | 1982 | |
1983 | ts->cl = cl; | |
1984 | ts->kind = kind; | |
1985 | ||
c5d33754 | 1986 | /* We have to know if it was a c interoperable kind so we can |
1987 | do accurate type checking of bind(c) procs, etc. */ | |
1988 | if (kind_expr != NULL) | |
1989 | { | |
1990 | /* Mark this as c interoperable if being declared with one | |
1991 | of the named constants from iso_c_binding. */ | |
1992 | ts->is_c_interop = kind_expr->ts.is_iso_c; | |
1993 | gfc_free_expr (kind_expr); | |
1994 | } | |
1995 | else if (len != NULL) | |
1996 | { | |
1997 | /* Here, we might have parsed something such as: | |
1998 | character(c_char) | |
1999 | In this case, the parsing code above grabs the c_char when | |
2000 | looking for the length (line 1690, roughly). it's the last | |
2001 | testcase for parsing the kind params of a character variable. | |
2002 | However, it's not actually the length. this seems like it | |
2003 | could be an error. | |
2004 | To see if the user used a C interop kind, test the expr | |
2005 | of the so called length, and see if it's C interoperable. */ | |
2006 | ts->is_c_interop = len->ts.is_iso_c; | |
2007 | } | |
2008 | ||
4ee9c684 | 2009 | return MATCH_YES; |
2010 | } | |
2011 | ||
2012 | ||
2013 | /* Matches a type specification. If successful, sets the ts structure | |
2014 | to the matched specification. This is necessary for FUNCTION and | |
2015 | IMPLICIT statements. | |
2016 | ||
e14bee04 | 2017 | If implicit_flag is nonzero, then we don't check for the optional |
39351103 | 2018 | kind specification. Not doing so is needed for matching an IMPLICIT |
4ee9c684 | 2019 | statement correctly. */ |
2020 | ||
39351103 | 2021 | static match |
1a9745d2 | 2022 | match_type_spec (gfc_typespec *ts, int implicit_flag) |
4ee9c684 | 2023 | { |
2024 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2025 | gfc_symbol *sym; | |
2026 | match m; | |
18f3698a | 2027 | int c; |
4ee9c684 | 2028 | |
2029 | gfc_clear_ts (ts); | |
2030 | ||
c5d33754 | 2031 | /* Clear the current binding label, in case one is given. */ |
2032 | curr_binding_label[0] = '\0'; | |
2033 | ||
25b29122 | 2034 | if (gfc_match (" byte") == MATCH_YES) |
2035 | { | |
e14bee04 | 2036 | if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C") |
25b29122 | 2037 | == FAILURE) |
2038 | return MATCH_ERROR; | |
2039 | ||
2040 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
2041 | { | |
2042 | gfc_error ("BYTE type used at %C " | |
2043 | "is not available on the target machine"); | |
2044 | return MATCH_ERROR; | |
2045 | } | |
e14bee04 | 2046 | |
25b29122 | 2047 | ts->type = BT_INTEGER; |
2048 | ts->kind = 1; | |
2049 | return MATCH_YES; | |
2050 | } | |
2051 | ||
4ee9c684 | 2052 | if (gfc_match (" integer") == MATCH_YES) |
2053 | { | |
2054 | ts->type = BT_INTEGER; | |
b8a891cb | 2055 | ts->kind = gfc_default_integer_kind; |
4ee9c684 | 2056 | goto get_kind; |
2057 | } | |
2058 | ||
2059 | if (gfc_match (" character") == MATCH_YES) | |
2060 | { | |
2061 | ts->type = BT_CHARACTER; | |
39351103 | 2062 | if (implicit_flag == 0) |
2063 | return match_char_spec (ts); | |
2064 | else | |
2065 | return MATCH_YES; | |
4ee9c684 | 2066 | } |
2067 | ||
2068 | if (gfc_match (" real") == MATCH_YES) | |
2069 | { | |
2070 | ts->type = BT_REAL; | |
b8a891cb | 2071 | ts->kind = gfc_default_real_kind; |
4ee9c684 | 2072 | goto get_kind; |
2073 | } | |
2074 | ||
2075 | if (gfc_match (" double precision") == MATCH_YES) | |
2076 | { | |
2077 | ts->type = BT_REAL; | |
b8a891cb | 2078 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2079 | return MATCH_YES; |
2080 | } | |
2081 | ||
2082 | if (gfc_match (" complex") == MATCH_YES) | |
2083 | { | |
2084 | ts->type = BT_COMPLEX; | |
b8a891cb | 2085 | ts->kind = gfc_default_complex_kind; |
4ee9c684 | 2086 | goto get_kind; |
2087 | } | |
2088 | ||
2089 | if (gfc_match (" double complex") == MATCH_YES) | |
2090 | { | |
be7f01a1 | 2091 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
2092 | "conform to the Fortran 95 standard") == FAILURE) | |
2093 | return MATCH_ERROR; | |
2094 | ||
4ee9c684 | 2095 | ts->type = BT_COMPLEX; |
b8a891cb | 2096 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2097 | return MATCH_YES; |
2098 | } | |
2099 | ||
2100 | if (gfc_match (" logical") == MATCH_YES) | |
2101 | { | |
2102 | ts->type = BT_LOGICAL; | |
b8a891cb | 2103 | ts->kind = gfc_default_logical_kind; |
4ee9c684 | 2104 | goto get_kind; |
2105 | } | |
2106 | ||
2107 | m = gfc_match (" type ( %n )", name); | |
2108 | if (m != MATCH_YES) | |
2109 | return m; | |
2110 | ||
2111 | /* Search for the name but allow the components to be defined later. */ | |
2112 | if (gfc_get_ha_symbol (name, &sym)) | |
2113 | { | |
2114 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2115 | return MATCH_ERROR; | |
2116 | } | |
2117 | ||
2118 | if (sym->attr.flavor != FL_DERIVED | |
950683ed | 2119 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 2120 | return MATCH_ERROR; |
2121 | ||
2122 | ts->type = BT_DERIVED; | |
2123 | ts->kind = 0; | |
2124 | ts->derived = sym; | |
2125 | ||
2126 | return MATCH_YES; | |
2127 | ||
2128 | get_kind: | |
2129 | /* For all types except double, derived and character, look for an | |
2130 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
39351103 | 2131 | if (implicit_flag == 1) |
4ee9c684 | 2132 | return MATCH_YES; |
2133 | ||
18f3698a | 2134 | if (gfc_current_form == FORM_FREE) |
2135 | { | |
2136 | c = gfc_peek_char(); | |
2137 | if (!gfc_is_whitespace(c) && c != '*' && c != '(' | |
1a9745d2 | 2138 | && c != ':' && c != ',') |
18f3698a | 2139 | return MATCH_NO; |
2140 | } | |
2141 | ||
4ee9c684 | 2142 | m = gfc_match_kind_spec (ts); |
2143 | if (m == MATCH_NO && ts->type != BT_CHARACTER) | |
2144 | m = gfc_match_old_kind_spec (ts); | |
2145 | ||
2146 | if (m == MATCH_NO) | |
2147 | m = MATCH_YES; /* No kind specifier found. */ | |
2148 | ||
2149 | return m; | |
2150 | } | |
2151 | ||
2152 | ||
39351103 | 2153 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
2154 | already matched in parse.c, or we would not end up here in the | |
2155 | first place. So the only thing we need to check, is if there is | |
2156 | trailing garbage. If not, the match is successful. */ | |
2157 | ||
2158 | match | |
2159 | gfc_match_implicit_none (void) | |
2160 | { | |
39351103 | 2161 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
2162 | } | |
2163 | ||
2164 | ||
2165 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
2166 | ||
2167 | static match | |
b70528c7 | 2168 | match_implicit_range (void) |
39351103 | 2169 | { |
2170 | int c, c1, c2, inner; | |
2171 | locus cur_loc; | |
2172 | ||
2173 | cur_loc = gfc_current_locus; | |
2174 | ||
2175 | gfc_gobble_whitespace (); | |
2176 | c = gfc_next_char (); | |
2177 | if (c != '(') | |
2178 | { | |
2179 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
2180 | goto bad; | |
2181 | } | |
2182 | ||
2183 | inner = 1; | |
2184 | while (inner) | |
2185 | { | |
2186 | gfc_gobble_whitespace (); | |
2187 | c1 = gfc_next_char (); | |
2188 | if (!ISALPHA (c1)) | |
2189 | goto bad; | |
2190 | ||
2191 | gfc_gobble_whitespace (); | |
2192 | c = gfc_next_char (); | |
2193 | ||
2194 | switch (c) | |
2195 | { | |
2196 | case ')': | |
f6d0e37a | 2197 | inner = 0; /* Fall through. */ |
39351103 | 2198 | |
2199 | case ',': | |
2200 | c2 = c1; | |
2201 | break; | |
2202 | ||
2203 | case '-': | |
2204 | gfc_gobble_whitespace (); | |
2205 | c2 = gfc_next_char (); | |
2206 | if (!ISALPHA (c2)) | |
2207 | goto bad; | |
2208 | ||
2209 | gfc_gobble_whitespace (); | |
2210 | c = gfc_next_char (); | |
2211 | ||
2212 | if ((c != ',') && (c != ')')) | |
2213 | goto bad; | |
2214 | if (c == ')') | |
2215 | inner = 0; | |
2216 | ||
2217 | break; | |
2218 | ||
2219 | default: | |
2220 | goto bad; | |
2221 | } | |
2222 | ||
2223 | if (c1 > c2) | |
2224 | { | |
2225 | gfc_error ("Letters must be in alphabetic order in " | |
2226 | "IMPLICIT statement at %C"); | |
2227 | goto bad; | |
2228 | } | |
2229 | ||
2230 | /* See if we can add the newly matched range to the pending | |
1a9745d2 | 2231 | implicits from this IMPLICIT statement. We do not check for |
2232 | conflicts with whatever earlier IMPLICIT statements may have | |
2233 | set. This is done when we've successfully finished matching | |
2234 | the current one. */ | |
b70528c7 | 2235 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
39351103 | 2236 | goto bad; |
2237 | } | |
2238 | ||
2239 | return MATCH_YES; | |
2240 | ||
2241 | bad: | |
2242 | gfc_syntax_error (ST_IMPLICIT); | |
2243 | ||
2244 | gfc_current_locus = cur_loc; | |
2245 | return MATCH_ERROR; | |
2246 | } | |
2247 | ||
2248 | ||
2249 | /* Match an IMPLICIT statement, storing the types for | |
2250 | gfc_set_implicit() if the statement is accepted by the parser. | |
2251 | There is a strange looking, but legal syntactic construction | |
2252 | possible. It looks like: | |
2253 | ||
2254 | IMPLICIT INTEGER (a-b) (c-d) | |
2255 | ||
2256 | This is legal if "a-b" is a constant expression that happens to | |
2257 | equal one of the legal kinds for integers. The real problem | |
2258 | happens with an implicit specification that looks like: | |
2259 | ||
2260 | IMPLICIT INTEGER (a-b) | |
2261 | ||
2262 | In this case, a typespec matcher that is "greedy" (as most of the | |
2263 | matchers are) gobbles the character range as a kindspec, leaving | |
2264 | nothing left. We therefore have to go a bit more slowly in the | |
2265 | matching process by inhibiting the kindspec checking during | |
2266 | typespec matching and checking for a kind later. */ | |
2267 | ||
2268 | match | |
2269 | gfc_match_implicit (void) | |
2270 | { | |
2271 | gfc_typespec ts; | |
2272 | locus cur_loc; | |
2273 | int c; | |
2274 | match m; | |
2275 | ||
2276 | /* We don't allow empty implicit statements. */ | |
2277 | if (gfc_match_eos () == MATCH_YES) | |
2278 | { | |
2279 | gfc_error ("Empty IMPLICIT statement at %C"); | |
2280 | return MATCH_ERROR; | |
2281 | } | |
2282 | ||
39351103 | 2283 | do |
2284 | { | |
b70528c7 | 2285 | /* First cleanup. */ |
2286 | gfc_clear_new_implicit (); | |
2287 | ||
39351103 | 2288 | /* A basic type is mandatory here. */ |
2289 | m = match_type_spec (&ts, 1); | |
2290 | if (m == MATCH_ERROR) | |
2291 | goto error; | |
2292 | if (m == MATCH_NO) | |
2293 | goto syntax; | |
2294 | ||
2295 | cur_loc = gfc_current_locus; | |
b70528c7 | 2296 | m = match_implicit_range (); |
39351103 | 2297 | |
2298 | if (m == MATCH_YES) | |
2299 | { | |
b70528c7 | 2300 | /* We may have <TYPE> (<RANGE>). */ |
39351103 | 2301 | gfc_gobble_whitespace (); |
2302 | c = gfc_next_char (); | |
2303 | if ((c == '\n') || (c == ',')) | |
b70528c7 | 2304 | { |
2305 | /* Check for CHARACTER with no length parameter. */ | |
2306 | if (ts.type == BT_CHARACTER && !ts.cl) | |
2307 | { | |
b8a891cb | 2308 | ts.kind = gfc_default_character_kind; |
b70528c7 | 2309 | ts.cl = gfc_get_charlen (); |
2310 | ts.cl->next = gfc_current_ns->cl_list; | |
2311 | gfc_current_ns->cl_list = ts.cl; | |
2312 | ts.cl->length = gfc_int_expr (1); | |
2313 | } | |
2314 | ||
2315 | /* Record the Successful match. */ | |
2316 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2317 | return MATCH_ERROR; | |
2318 | continue; | |
2319 | } | |
39351103 | 2320 | |
2321 | gfc_current_locus = cur_loc; | |
2322 | } | |
2323 | ||
b70528c7 | 2324 | /* Discard the (incorrectly) matched range. */ |
2325 | gfc_clear_new_implicit (); | |
2326 | ||
2327 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
2328 | if (ts.type == BT_CHARACTER) | |
2329 | m = match_char_spec (&ts); | |
2330 | else | |
39351103 | 2331 | { |
b70528c7 | 2332 | m = gfc_match_kind_spec (&ts); |
39351103 | 2333 | if (m == MATCH_NO) |
b70528c7 | 2334 | { |
2335 | m = gfc_match_old_kind_spec (&ts); | |
2336 | if (m == MATCH_ERROR) | |
2337 | goto error; | |
2338 | if (m == MATCH_NO) | |
2339 | goto syntax; | |
2340 | } | |
39351103 | 2341 | } |
b70528c7 | 2342 | if (m == MATCH_ERROR) |
2343 | goto error; | |
39351103 | 2344 | |
b70528c7 | 2345 | m = match_implicit_range (); |
39351103 | 2346 | if (m == MATCH_ERROR) |
2347 | goto error; | |
2348 | if (m == MATCH_NO) | |
2349 | goto syntax; | |
2350 | ||
2351 | gfc_gobble_whitespace (); | |
2352 | c = gfc_next_char (); | |
2353 | if ((c != '\n') && (c != ',')) | |
2354 | goto syntax; | |
2355 | ||
b70528c7 | 2356 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2357 | return MATCH_ERROR; | |
39351103 | 2358 | } |
2359 | while (c == ','); | |
2360 | ||
b70528c7 | 2361 | return MATCH_YES; |
39351103 | 2362 | |
2363 | syntax: | |
2364 | gfc_syntax_error (ST_IMPLICIT); | |
2365 | ||
2366 | error: | |
2367 | return MATCH_ERROR; | |
2368 | } | |
2369 | ||
f6d0e37a | 2370 | |
d67fc9ae | 2371 | match |
2372 | gfc_match_import (void) | |
2373 | { | |
2374 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2375 | match m; | |
2376 | gfc_symbol *sym; | |
2377 | gfc_symtree *st; | |
2378 | ||
f6d0e37a | 2379 | if (gfc_current_ns->proc_name == NULL |
2380 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
d67fc9ae | 2381 | { |
2382 | gfc_error ("IMPORT statement at %C only permitted in " | |
2383 | "an INTERFACE body"); | |
2384 | return MATCH_ERROR; | |
2385 | } | |
2386 | ||
1a9745d2 | 2387 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
d67fc9ae | 2388 | == FAILURE) |
2389 | return MATCH_ERROR; | |
2390 | ||
2391 | if (gfc_match_eos () == MATCH_YES) | |
2392 | { | |
2393 | /* All host variables should be imported. */ | |
2394 | gfc_current_ns->has_import_set = 1; | |
2395 | return MATCH_YES; | |
2396 | } | |
2397 | ||
2398 | if (gfc_match (" ::") == MATCH_YES) | |
2399 | { | |
2400 | if (gfc_match_eos () == MATCH_YES) | |
1a9745d2 | 2401 | { |
2402 | gfc_error ("Expecting list of named entities at %C"); | |
2403 | return MATCH_ERROR; | |
2404 | } | |
d67fc9ae | 2405 | } |
2406 | ||
2407 | for(;;) | |
2408 | { | |
2409 | m = gfc_match (" %n", name); | |
2410 | switch (m) | |
2411 | { | |
2412 | case MATCH_YES: | |
096d4ad9 | 2413 | if (gfc_current_ns->parent != NULL |
f6d0e37a | 2414 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
096d4ad9 | 2415 | { |
2416 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2417 | return MATCH_ERROR; | |
2418 | } | |
2419 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
f6d0e37a | 2420 | && gfc_find_symbol (name, |
2421 | gfc_current_ns->proc_name->ns->parent, | |
2422 | 1, &sym)) | |
1a9745d2 | 2423 | { |
2424 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2425 | return MATCH_ERROR; | |
2426 | } | |
2427 | ||
2428 | if (sym == NULL) | |
2429 | { | |
2430 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2431 | "at %C - does not exist.", name); | |
2432 | return MATCH_ERROR; | |
2433 | } | |
2434 | ||
e14bee04 | 2435 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) |
1a9745d2 | 2436 | { |
2437 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2438 | "at %C.", name); | |
2439 | goto next_item; | |
2440 | } | |
2441 | ||
2442 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
2443 | st->n.sym = sym; | |
2444 | sym->refs++; | |
c723595c | 2445 | sym->attr.imported = 1; |
d67fc9ae | 2446 | |
2447 | goto next_item; | |
2448 | ||
2449 | case MATCH_NO: | |
2450 | break; | |
2451 | ||
2452 | case MATCH_ERROR: | |
2453 | return MATCH_ERROR; | |
2454 | } | |
2455 | ||
2456 | next_item: | |
2457 | if (gfc_match_eos () == MATCH_YES) | |
2458 | break; | |
2459 | if (gfc_match_char (',') != MATCH_YES) | |
2460 | goto syntax; | |
2461 | } | |
2462 | ||
2463 | return MATCH_YES; | |
2464 | ||
2465 | syntax: | |
2466 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2467 | return MATCH_ERROR; | |
2468 | } | |
39351103 | 2469 | |
f6d0e37a | 2470 | |
c72e5f7e | 2471 | /* A minimal implementation of gfc_match without whitespace, escape |
2472 | characters or variable arguments. Returns true if the next | |
2473 | characters match the TARGET template exactly. */ | |
2474 | ||
2475 | static bool | |
2476 | match_string_p (const char *target) | |
2477 | { | |
2478 | const char *p; | |
2479 | ||
2480 | for (p = target; *p; p++) | |
2481 | if (gfc_next_char () != *p) | |
2482 | return false; | |
2483 | return true; | |
2484 | } | |
2485 | ||
4ee9c684 | 2486 | /* Matches an attribute specification including array specs. If |
2487 | successful, leaves the variables current_attr and current_as | |
2488 | holding the specification. Also sets the colon_seen variable for | |
2489 | later use by matchers associated with initializations. | |
2490 | ||
2491 | This subroutine is a little tricky in the sense that we don't know | |
2492 | if we really have an attr-spec until we hit the double colon. | |
2493 | Until that time, we can only return MATCH_NO. This forces us to | |
2494 | check for duplicate specification at this level. */ | |
2495 | ||
2496 | static match | |
2497 | match_attr_spec (void) | |
2498 | { | |
4ee9c684 | 2499 | /* Modifiers that can exist in a type statement. */ |
2500 | typedef enum | |
2501 | { GFC_DECL_BEGIN = 0, | |
2502 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
2503 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
3ea52af3 | 2504 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
2505 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
c72e5f7e | 2506 | DECL_IS_BIND_C, DECL_NONE, |
4ee9c684 | 2507 | GFC_DECL_END /* Sentinel */ |
2508 | } | |
2509 | decl_types; | |
2510 | ||
2511 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
2512 | #define NUM_DECL GFC_DECL_END | |
2513 | ||
4ee9c684 | 2514 | locus start, seen_at[NUM_DECL]; |
2515 | int seen[NUM_DECL]; | |
2516 | decl_types d; | |
2517 | const char *attr; | |
2518 | match m; | |
2519 | try t; | |
2520 | ||
2521 | gfc_clear_attr (¤t_attr); | |
cbb9e6aa | 2522 | start = gfc_current_locus; |
4ee9c684 | 2523 | |
2524 | current_as = NULL; | |
2525 | colon_seen = 0; | |
2526 | ||
2527 | /* See if we get all of the keywords up to the final double colon. */ | |
2528 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2529 | seen[d] = 0; | |
2530 | ||
2531 | for (;;) | |
2532 | { | |
c72e5f7e | 2533 | int ch; |
c5d33754 | 2534 | |
c72e5f7e | 2535 | d = DECL_NONE; |
2536 | gfc_gobble_whitespace (); | |
2537 | ||
2538 | ch = gfc_next_char (); | |
2539 | if (ch == ':') | |
2540 | { | |
2541 | /* This is the successful exit condition for the loop. */ | |
2542 | if (gfc_next_char () == ':') | |
2543 | break; | |
2544 | } | |
2545 | else if (ch == ',') | |
c5d33754 | 2546 | { |
c5d33754 | 2547 | gfc_gobble_whitespace (); |
c72e5f7e | 2548 | switch (gfc_peek_char ()) |
c5d33754 | 2549 | { |
c72e5f7e | 2550 | case 'a': |
2551 | if (match_string_p ("allocatable")) | |
2552 | d = DECL_ALLOCATABLE; | |
2553 | break; | |
2554 | ||
2555 | case 'b': | |
c5d33754 | 2556 | /* Try and match the bind(c). */ |
5cf92482 | 2557 | m = gfc_match_bind_c (NULL); |
2558 | if (m == MATCH_YES) | |
c5d33754 | 2559 | d = DECL_IS_BIND_C; |
5cf92482 | 2560 | else if (m == MATCH_ERROR) |
2561 | goto cleanup; | |
c72e5f7e | 2562 | break; |
2563 | ||
2564 | case 'd': | |
2565 | if (match_string_p ("dimension")) | |
2566 | d = DECL_DIMENSION; | |
2567 | break; | |
2568 | ||
2569 | case 'e': | |
2570 | if (match_string_p ("external")) | |
2571 | d = DECL_EXTERNAL; | |
2572 | break; | |
2573 | ||
2574 | case 'i': | |
2575 | if (match_string_p ("int")) | |
2576 | { | |
2577 | ch = gfc_next_char (); | |
2578 | if (ch == 'e') | |
2579 | { | |
2580 | if (match_string_p ("nt")) | |
2581 | { | |
2582 | /* Matched "intent". */ | |
2583 | /* TODO: Call match_intent_spec from here. */ | |
2584 | if (gfc_match (" ( in out )") == MATCH_YES) | |
2585 | d = DECL_INOUT; | |
2586 | else if (gfc_match (" ( in )") == MATCH_YES) | |
2587 | d = DECL_IN; | |
2588 | else if (gfc_match (" ( out )") == MATCH_YES) | |
2589 | d = DECL_OUT; | |
2590 | } | |
2591 | } | |
2592 | else if (ch == 'r') | |
2593 | { | |
2594 | if (match_string_p ("insic")) | |
2595 | { | |
2596 | /* Matched "intrinsic". */ | |
2597 | d = DECL_INTRINSIC; | |
2598 | } | |
2599 | } | |
2600 | } | |
2601 | break; | |
2602 | ||
2603 | case 'o': | |
2604 | if (match_string_p ("optional")) | |
2605 | d = DECL_OPTIONAL; | |
2606 | break; | |
2607 | ||
2608 | case 'p': | |
2609 | gfc_next_char (); | |
2610 | switch (gfc_next_char ()) | |
2611 | { | |
2612 | case 'a': | |
2613 | if (match_string_p ("rameter")) | |
2614 | { | |
2615 | /* Matched "parameter". */ | |
2616 | d = DECL_PARAMETER; | |
2617 | } | |
2618 | break; | |
2619 | ||
2620 | case 'o': | |
2621 | if (match_string_p ("inter")) | |
2622 | { | |
2623 | /* Matched "pointer". */ | |
2624 | d = DECL_POINTER; | |
2625 | } | |
2626 | break; | |
2627 | ||
2628 | case 'r': | |
2629 | ch = gfc_next_char (); | |
2630 | if (ch == 'i') | |
2631 | { | |
2632 | if (match_string_p ("vate")) | |
2633 | { | |
2634 | /* Matched "private". */ | |
2635 | d = DECL_PRIVATE; | |
2636 | } | |
2637 | } | |
2638 | else if (ch == 'o') | |
2639 | { | |
2640 | if (match_string_p ("tected")) | |
2641 | { | |
2642 | /* Matched "protected". */ | |
2643 | d = DECL_PROTECTED; | |
2644 | } | |
2645 | } | |
2646 | break; | |
2647 | ||
2648 | case 'u': | |
2649 | if (match_string_p ("blic")) | |
2650 | { | |
2651 | /* Matched "public". */ | |
2652 | d = DECL_PUBLIC; | |
2653 | } | |
2654 | break; | |
2655 | } | |
2656 | break; | |
2657 | ||
2658 | case 's': | |
2659 | if (match_string_p ("save")) | |
2660 | d = DECL_SAVE; | |
2661 | break; | |
2662 | ||
2663 | case 't': | |
2664 | if (match_string_p ("target")) | |
2665 | d = DECL_TARGET; | |
2666 | break; | |
2667 | ||
2668 | case 'v': | |
2669 | gfc_next_char (); | |
2670 | ch = gfc_next_char (); | |
2671 | if (ch == 'a') | |
2672 | { | |
2673 | if (match_string_p ("lue")) | |
2674 | { | |
2675 | /* Matched "value". */ | |
2676 | d = DECL_VALUE; | |
2677 | } | |
2678 | } | |
2679 | else if (ch == 'o') | |
2680 | { | |
2681 | if (match_string_p ("latile")) | |
2682 | { | |
2683 | /* Matched "volatile". */ | |
2684 | d = DECL_VOLATILE; | |
2685 | } | |
2686 | } | |
2687 | break; | |
c5d33754 | 2688 | } |
2689 | } | |
f3f9b222 | 2690 | |
c72e5f7e | 2691 | /* No double colon and no recognizable decl_type, so assume that |
2692 | we've been looking at something else the whole time. */ | |
2693 | if (d == DECL_NONE) | |
2694 | { | |
2695 | m = MATCH_NO; | |
2696 | goto cleanup; | |
2697 | } | |
e14bee04 | 2698 | |
4ee9c684 | 2699 | seen[d]++; |
cbb9e6aa | 2700 | seen_at[d] = gfc_current_locus; |
4ee9c684 | 2701 | |
2702 | if (d == DECL_DIMENSION) | |
2703 | { | |
2704 | m = gfc_match_array_spec (¤t_as); | |
2705 | ||
2706 | if (m == MATCH_NO) | |
2707 | { | |
2708 | gfc_error ("Missing dimension specification at %C"); | |
2709 | m = MATCH_ERROR; | |
2710 | } | |
2711 | ||
2712 | if (m == MATCH_ERROR) | |
2713 | goto cleanup; | |
2714 | } | |
2715 | } | |
2716 | ||
4ee9c684 | 2717 | /* Since we've seen a double colon, we have to be looking at an |
2718 | attr-spec. This means that we can now issue errors. */ | |
2719 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2720 | if (seen[d] > 1) | |
2721 | { | |
2722 | switch (d) | |
2723 | { | |
2724 | case DECL_ALLOCATABLE: | |
2725 | attr = "ALLOCATABLE"; | |
2726 | break; | |
2727 | case DECL_DIMENSION: | |
2728 | attr = "DIMENSION"; | |
2729 | break; | |
2730 | case DECL_EXTERNAL: | |
2731 | attr = "EXTERNAL"; | |
2732 | break; | |
2733 | case DECL_IN: | |
2734 | attr = "INTENT (IN)"; | |
2735 | break; | |
2736 | case DECL_OUT: | |
2737 | attr = "INTENT (OUT)"; | |
2738 | break; | |
2739 | case DECL_INOUT: | |
2740 | attr = "INTENT (IN OUT)"; | |
2741 | break; | |
2742 | case DECL_INTRINSIC: | |
2743 | attr = "INTRINSIC"; | |
2744 | break; | |
2745 | case DECL_OPTIONAL: | |
2746 | attr = "OPTIONAL"; | |
2747 | break; | |
2748 | case DECL_PARAMETER: | |
2749 | attr = "PARAMETER"; | |
2750 | break; | |
2751 | case DECL_POINTER: | |
2752 | attr = "POINTER"; | |
2753 | break; | |
3ea52af3 | 2754 | case DECL_PROTECTED: |
2755 | attr = "PROTECTED"; | |
2756 | break; | |
4ee9c684 | 2757 | case DECL_PRIVATE: |
2758 | attr = "PRIVATE"; | |
2759 | break; | |
2760 | case DECL_PUBLIC: | |
2761 | attr = "PUBLIC"; | |
2762 | break; | |
2763 | case DECL_SAVE: | |
2764 | attr = "SAVE"; | |
2765 | break; | |
2766 | case DECL_TARGET: | |
2767 | attr = "TARGET"; | |
2768 | break; | |
c5d33754 | 2769 | case DECL_IS_BIND_C: |
2770 | attr = "IS_BIND_C"; | |
2771 | break; | |
2772 | case DECL_VALUE: | |
2773 | attr = "VALUE"; | |
2774 | break; | |
ef814c81 | 2775 | case DECL_VOLATILE: |
2776 | attr = "VOLATILE"; | |
2777 | break; | |
4ee9c684 | 2778 | default: |
f6d0e37a | 2779 | attr = NULL; /* This shouldn't happen. */ |
4ee9c684 | 2780 | } |
2781 | ||
2782 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
2783 | m = MATCH_ERROR; | |
2784 | goto cleanup; | |
2785 | } | |
2786 | ||
2787 | /* Now that we've dealt with duplicate attributes, add the attributes | |
2788 | to the current attribute. */ | |
2789 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2790 | { | |
2791 | if (seen[d] == 0) | |
2792 | continue; | |
2793 | ||
2794 | if (gfc_current_state () == COMP_DERIVED | |
2795 | && d != DECL_DIMENSION && d != DECL_POINTER | |
c72e5f7e | 2796 | && d != DECL_PRIVATE && d != DECL_PUBLIC |
2797 | && d != DECL_NONE) | |
4ee9c684 | 2798 | { |
2294b616 | 2799 | if (d == DECL_ALLOCATABLE) |
2800 | { | |
1a9745d2 | 2801 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
2802 | "attribute at %C in a TYPE definition") | |
e14bee04 | 2803 | == FAILURE) |
2294b616 | 2804 | { |
2805 | m = MATCH_ERROR; | |
2806 | goto cleanup; | |
2807 | } | |
1a9745d2 | 2808 | } |
2809 | else | |
2294b616 | 2810 | { |
2811 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
e14bee04 | 2812 | &seen_at[d]); |
2294b616 | 2813 | m = MATCH_ERROR; |
2814 | goto cleanup; | |
2815 | } | |
4ee9c684 | 2816 | } |
2817 | ||
ea13b9b7 | 2818 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
1a9745d2 | 2819 | && gfc_current_state () != COMP_MODULE) |
ea13b9b7 | 2820 | { |
2821 | if (d == DECL_PRIVATE) | |
2822 | attr = "PRIVATE"; | |
2823 | else | |
2824 | attr = "PUBLIC"; | |
e14bee04 | 2825 | if (gfc_current_state () == COMP_DERIVED |
2826 | && gfc_state_stack->previous | |
2827 | && gfc_state_stack->previous->state == COMP_MODULE) | |
2828 | { | |
2829 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s " | |
2830 | "at %L in a TYPE definition", attr, | |
2831 | &seen_at[d]) | |
2832 | == FAILURE) | |
2833 | { | |
2834 | m = MATCH_ERROR; | |
2835 | goto cleanup; | |
2836 | } | |
2837 | } | |
2838 | else | |
2839 | { | |
2840 | gfc_error ("%s attribute at %L is not allowed outside of the " | |
2841 | "specification part of a module", attr, &seen_at[d]); | |
2842 | m = MATCH_ERROR; | |
2843 | goto cleanup; | |
2844 | } | |
ea13b9b7 | 2845 | } |
2846 | ||
4ee9c684 | 2847 | switch (d) |
2848 | { | |
2849 | case DECL_ALLOCATABLE: | |
2850 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
2851 | break; | |
2852 | ||
2853 | case DECL_DIMENSION: | |
950683ed | 2854 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 2855 | break; |
2856 | ||
2857 | case DECL_EXTERNAL: | |
2858 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
2859 | break; | |
2860 | ||
2861 | case DECL_IN: | |
2862 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
2863 | break; | |
2864 | ||
2865 | case DECL_OUT: | |
2866 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
2867 | break; | |
2868 | ||
2869 | case DECL_INOUT: | |
2870 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
2871 | break; | |
2872 | ||
2873 | case DECL_INTRINSIC: | |
2874 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
2875 | break; | |
2876 | ||
2877 | case DECL_OPTIONAL: | |
2878 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
2879 | break; | |
2880 | ||
2881 | case DECL_PARAMETER: | |
950683ed | 2882 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
4ee9c684 | 2883 | break; |
2884 | ||
2885 | case DECL_POINTER: | |
2886 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
2887 | break; | |
2888 | ||
3ea52af3 | 2889 | case DECL_PROTECTED: |
2890 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
2891 | { | |
2892 | gfc_error ("PROTECTED at %C only allowed in specification " | |
2893 | "part of a module"); | |
2894 | t = FAILURE; | |
2895 | break; | |
2896 | } | |
2897 | ||
1a9745d2 | 2898 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
2899 | "attribute at %C") | |
3ea52af3 | 2900 | == FAILURE) |
2901 | t = FAILURE; | |
2902 | else | |
2903 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
2904 | break; | |
2905 | ||
4ee9c684 | 2906 | case DECL_PRIVATE: |
950683ed | 2907 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
2908 | &seen_at[d]); | |
4ee9c684 | 2909 | break; |
2910 | ||
2911 | case DECL_PUBLIC: | |
950683ed | 2912 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
2913 | &seen_at[d]); | |
4ee9c684 | 2914 | break; |
2915 | ||
2916 | case DECL_SAVE: | |
950683ed | 2917 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 2918 | break; |
2919 | ||
2920 | case DECL_TARGET: | |
2921 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
2922 | break; | |
2923 | ||
c5d33754 | 2924 | case DECL_IS_BIND_C: |
2925 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); | |
2926 | break; | |
2927 | ||
8f6339b6 | 2928 | case DECL_VALUE: |
1a9745d2 | 2929 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
2930 | "at %C") | |
8f6339b6 | 2931 | == FAILURE) |
2932 | t = FAILURE; | |
2933 | else | |
2934 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
2935 | break; | |
2936 | ||
ef814c81 | 2937 | case DECL_VOLATILE: |
2938 | if (gfc_notify_std (GFC_STD_F2003, | |
1a9745d2 | 2939 | "Fortran 2003: VOLATILE attribute at %C") |
ef814c81 | 2940 | == FAILURE) |
2941 | t = FAILURE; | |
2942 | else | |
2943 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
2944 | break; | |
2945 | ||
4ee9c684 | 2946 | default: |
2947 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
2948 | } | |
2949 | ||
2950 | if (t == FAILURE) | |
2951 | { | |
2952 | m = MATCH_ERROR; | |
2953 | goto cleanup; | |
2954 | } | |
2955 | } | |
2956 | ||
2957 | colon_seen = 1; | |
2958 | return MATCH_YES; | |
2959 | ||
2960 | cleanup: | |
cbb9e6aa | 2961 | gfc_current_locus = start; |
4ee9c684 | 2962 | gfc_free_array_spec (current_as); |
2963 | current_as = NULL; | |
2964 | return m; | |
2965 | } | |
2966 | ||
2967 | ||
c5d33754 | 2968 | /* Set the binding label, dest_label, either with the binding label |
2969 | stored in the given gfc_typespec, ts, or if none was provided, it | |
2970 | will be the symbol name in all lower case, as required by the draft | |
2971 | (J3/04-007, section 15.4.1). If a binding label was given and | |
2972 | there is more than one argument (num_idents), it is an error. */ | |
2973 | ||
2974 | try | |
2975 | set_binding_label (char *dest_label, const char *sym_name, int num_idents) | |
2976 | { | |
825718f9 | 2977 | if (num_idents > 1 && has_name_equals) |
c5d33754 | 2978 | { |
825718f9 | 2979 | gfc_error ("Multiple identifiers provided with " |
2980 | "single NAME= specifier at %C"); | |
2981 | return FAILURE; | |
2982 | } | |
c5d33754 | 2983 | |
825718f9 | 2984 | if (curr_binding_label[0] != '\0') |
2985 | { | |
c5d33754 | 2986 | /* Binding label given; store in temp holder til have sym. */ |
2987 | strncpy (dest_label, curr_binding_label, | |
2988 | strlen (curr_binding_label) + 1); | |
2989 | } | |
2990 | else | |
2991 | { | |
2992 | /* No binding label given, and the NAME= specifier did not exist, | |
2993 | which means there was no NAME="". */ | |
2994 | if (sym_name != NULL && has_name_equals == 0) | |
2995 | strncpy (dest_label, sym_name, strlen (sym_name) + 1); | |
2996 | } | |
2997 | ||
2998 | return SUCCESS; | |
2999 | } | |
3000 | ||
3001 | ||
3002 | /* Set the status of the given common block as being BIND(C) or not, | |
3003 | depending on the given parameter, is_bind_c. */ | |
3004 | ||
3005 | void | |
3006 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) | |
3007 | { | |
3008 | com_block->is_bind_c = is_bind_c; | |
3009 | return; | |
3010 | } | |
3011 | ||
3012 | ||
3013 | /* Verify that the given gfc_typespec is for a C interoperable type. */ | |
3014 | ||
3015 | try | |
3016 | verify_c_interop (gfc_typespec *ts, const char *name, locus *where) | |
3017 | { | |
3018 | try t; | |
3019 | ||
3020 | /* Make sure the kind used is appropriate for the type. | |
3021 | The f90_type is unknown if an integer constant was | |
3022 | used (e.g., real(4), bind(c) :: myFloat). */ | |
3023 | if (ts->f90_type != BT_UNKNOWN) | |
3024 | { | |
3025 | t = gfc_validate_c_kind (ts); | |
3026 | if (t != SUCCESS) | |
3027 | { | |
3028 | /* Print an error, but continue parsing line. */ | |
3029 | gfc_error_now ("C kind parameter is for type %s but " | |
3030 | "symbol '%s' at %L is of type %s", | |
3031 | gfc_basic_typename (ts->f90_type), | |
3032 | name, where, | |
3033 | gfc_basic_typename (ts->type)); | |
3034 | } | |
3035 | } | |
3036 | ||
3037 | /* Make sure the kind is C interoperable. This does not care about the | |
3038 | possible error above. */ | |
3039 | if (ts->type == BT_DERIVED && ts->derived != NULL) | |
3040 | return (ts->derived->ts.is_c_interop ? SUCCESS : FAILURE); | |
3041 | else if (ts->is_c_interop != 1) | |
3042 | return FAILURE; | |
3043 | ||
3044 | return SUCCESS; | |
3045 | } | |
3046 | ||
3047 | ||
3048 | /* Verify that the variables of a given common block, which has been | |
3049 | defined with the attribute specifier bind(c), to be of a C | |
3050 | interoperable type. Errors will be reported here, if | |
3051 | encountered. */ | |
3052 | ||
3053 | try | |
3054 | verify_com_block_vars_c_interop (gfc_common_head *com_block) | |
3055 | { | |
3056 | gfc_symbol *curr_sym = NULL; | |
3057 | try retval = SUCCESS; | |
3058 | ||
3059 | curr_sym = com_block->head; | |
3060 | ||
3061 | /* Make sure we have at least one symbol. */ | |
3062 | if (curr_sym == NULL) | |
3063 | return retval; | |
3064 | ||
3065 | /* Here we know we have a symbol, so we'll execute this loop | |
3066 | at least once. */ | |
3067 | do | |
3068 | { | |
3069 | /* The second to last param, 1, says this is in a common block. */ | |
3070 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); | |
3071 | curr_sym = curr_sym->common_next; | |
3072 | } while (curr_sym != NULL); | |
3073 | ||
3074 | return retval; | |
3075 | } | |
3076 | ||
3077 | ||
3078 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, | |
3079 | an appropriate error message is reported. */ | |
3080 | ||
3081 | try | |
3082 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, | |
3083 | int is_in_common, gfc_common_head *com_block) | |
3084 | { | |
3085 | try retval = SUCCESS; | |
4f7bb9ec | 3086 | |
3087 | if (tmp_sym->attr.function && tmp_sym->result != NULL) | |
3088 | { | |
3089 | tmp_sym = tmp_sym->result; | |
3090 | /* Make sure it wasn't an implicitly typed result. */ | |
3091 | if (tmp_sym->attr.implicit_type) | |
3092 | { | |
3093 | gfc_warning ("Implicitly declared BIND(C) function '%s' at " | |
3094 | "%L may not be C interoperable", tmp_sym->name, | |
3095 | &tmp_sym->declared_at); | |
3096 | tmp_sym->ts.f90_type = tmp_sym->ts.type; | |
3097 | /* Mark it as C interoperable to prevent duplicate warnings. */ | |
3098 | tmp_sym->ts.is_c_interop = 1; | |
3099 | tmp_sym->attr.is_c_interop = 1; | |
3100 | } | |
3101 | } | |
c5d33754 | 3102 | |
3103 | /* Here, we know we have the bind(c) attribute, so if we have | |
3104 | enough type info, then verify that it's a C interop kind. | |
3105 | The info could be in the symbol already, or possibly still in | |
3106 | the given ts (current_ts), so look in both. */ | |
3107 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) | |
3108 | { | |
3109 | if (verify_c_interop (&(tmp_sym->ts), tmp_sym->name, | |
3110 | &(tmp_sym->declared_at)) != SUCCESS) | |
3111 | { | |
3112 | /* See if we're dealing with a sym in a common block or not. */ | |
3113 | if (is_in_common == 1) | |
3114 | { | |
3115 | gfc_warning ("Variable '%s' in common block '%s' at %L " | |
3116 | "may not be a C interoperable " | |
3117 | "kind though common block '%s' is BIND(C)", | |
3118 | tmp_sym->name, com_block->name, | |
3119 | &(tmp_sym->declared_at), com_block->name); | |
3120 | } | |
3121 | else | |
3122 | { | |
3123 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) | |
3124 | gfc_error ("Type declaration '%s' at %L is not C " | |
3125 | "interoperable but it is BIND(C)", | |
3126 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3127 | else | |
3128 | gfc_warning ("Variable '%s' at %L " | |
3129 | "may not be a C interoperable " | |
3130 | "kind but it is bind(c)", | |
3131 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3132 | } | |
3133 | } | |
3134 | ||
3135 | /* Variables declared w/in a common block can't be bind(c) | |
3136 | since there's no way for C to see these variables, so there's | |
3137 | semantically no reason for the attribute. */ | |
3138 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) | |
3139 | { | |
3140 | gfc_error ("Variable '%s' in common block '%s' at " | |
3141 | "%L cannot be declared with BIND(C) " | |
3142 | "since it is not a global", | |
3143 | tmp_sym->name, com_block->name, | |
3144 | &(tmp_sym->declared_at)); | |
3145 | retval = FAILURE; | |
3146 | } | |
3147 | ||
3148 | /* Scalar variables that are bind(c) can not have the pointer | |
3149 | or allocatable attributes. */ | |
3150 | if (tmp_sym->attr.is_bind_c == 1) | |
3151 | { | |
3152 | if (tmp_sym->attr.pointer == 1) | |
3153 | { | |
3154 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3155 | "POINTER and BIND(C) attributes", | |
3156 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3157 | retval = FAILURE; | |
3158 | } | |
3159 | ||
3160 | if (tmp_sym->attr.allocatable == 1) | |
3161 | { | |
3162 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3163 | "ALLOCATABLE and BIND(C) attributes", | |
3164 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3165 | retval = FAILURE; | |
3166 | } | |
3167 | ||
3168 | /* If it is a BIND(C) function, make sure the return value is a | |
3169 | scalar value. The previous tests in this function made sure | |
3170 | the type is interoperable. */ | |
3171 | if (tmp_sym->attr.function == 1 && tmp_sym->as != NULL) | |
3172 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3173 | "be an array", tmp_sym->name, &(tmp_sym->declared_at)); | |
3174 | ||
3175 | /* BIND(C) functions can not return a character string. */ | |
3176 | if (tmp_sym->attr.function == 1 && tmp_sym->ts.type == BT_CHARACTER) | |
3177 | if (tmp_sym->ts.cl == NULL || tmp_sym->ts.cl->length == NULL | |
3178 | || tmp_sym->ts.cl->length->expr_type != EXPR_CONSTANT | |
3179 | || mpz_cmp_si (tmp_sym->ts.cl->length->value.integer, 1) != 0) | |
3180 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3181 | "be a character string", tmp_sym->name, | |
3182 | &(tmp_sym->declared_at)); | |
3183 | } | |
3184 | } | |
3185 | ||
3186 | /* See if the symbol has been marked as private. If it has, make sure | |
3187 | there is no binding label and warn the user if there is one. */ | |
3188 | if (tmp_sym->attr.access == ACCESS_PRIVATE | |
3189 | && tmp_sym->binding_label[0] != '\0') | |
3190 | /* Use gfc_warning_now because we won't say that the symbol fails | |
3191 | just because of this. */ | |
3192 | gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " | |
3193 | "given the binding label '%s'", tmp_sym->name, | |
3194 | &(tmp_sym->declared_at), tmp_sym->binding_label); | |
3195 | ||
3196 | return retval; | |
3197 | } | |
3198 | ||
3199 | ||
3200 | /* Set the appropriate fields for a symbol that's been declared as | |
3201 | BIND(C) (the is_bind_c flag and the binding label), and verify that | |
3202 | the type is C interoperable. Errors are reported by the functions | |
3203 | used to set/test these fields. */ | |
3204 | ||
3205 | try | |
3206 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) | |
3207 | { | |
3208 | try retval = SUCCESS; | |
3209 | ||
3210 | /* TODO: Do we need to make sure the vars aren't marked private? */ | |
3211 | ||
3212 | /* Set the is_bind_c bit in symbol_attribute. */ | |
3213 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); | |
3214 | ||
3215 | if (set_binding_label (tmp_sym->binding_label, tmp_sym->name, | |
3216 | num_idents) != SUCCESS) | |
3217 | return FAILURE; | |
3218 | ||
3219 | return retval; | |
3220 | } | |
3221 | ||
3222 | ||
3223 | /* Set the fields marking the given common block as BIND(C), including | |
3224 | a binding label, and report any errors encountered. */ | |
3225 | ||
3226 | try | |
3227 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) | |
3228 | { | |
3229 | try retval = SUCCESS; | |
3230 | ||
3231 | /* destLabel, common name, typespec (which may have binding label). */ | |
3232 | if (set_binding_label (com_block->binding_label, com_block->name, num_idents) | |
3233 | != SUCCESS) | |
3234 | return FAILURE; | |
3235 | ||
3236 | /* Set the given common block (com_block) to being bind(c) (1). */ | |
3237 | set_com_block_bind_c (com_block, 1); | |
3238 | ||
3239 | return retval; | |
3240 | } | |
3241 | ||
3242 | ||
3243 | /* Retrieve the list of one or more identifiers that the given bind(c) | |
3244 | attribute applies to. */ | |
3245 | ||
3246 | try | |
3247 | get_bind_c_idents (void) | |
3248 | { | |
3249 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3250 | int num_idents = 0; | |
3251 | gfc_symbol *tmp_sym = NULL; | |
3252 | match found_id; | |
3253 | gfc_common_head *com_block = NULL; | |
3254 | ||
3255 | if (gfc_match_name (name) == MATCH_YES) | |
3256 | { | |
3257 | found_id = MATCH_YES; | |
3258 | gfc_get_ha_symbol (name, &tmp_sym); | |
3259 | } | |
3260 | else if (match_common_name (name) == MATCH_YES) | |
3261 | { | |
3262 | found_id = MATCH_YES; | |
3263 | com_block = gfc_get_common (name, 0); | |
3264 | } | |
3265 | else | |
3266 | { | |
3267 | gfc_error ("Need either entity or common block name for " | |
3268 | "attribute specification statement at %C"); | |
3269 | return FAILURE; | |
3270 | } | |
3271 | ||
3272 | /* Save the current identifier and look for more. */ | |
3273 | do | |
3274 | { | |
3275 | /* Increment the number of identifiers found for this spec stmt. */ | |
3276 | num_idents++; | |
3277 | ||
3278 | /* Make sure we have a sym or com block, and verify that it can | |
3279 | be bind(c). Set the appropriate field(s) and look for more | |
3280 | identifiers. */ | |
3281 | if (tmp_sym != NULL || com_block != NULL) | |
3282 | { | |
3283 | if (tmp_sym != NULL) | |
3284 | { | |
3285 | if (set_verify_bind_c_sym (tmp_sym, num_idents) | |
3286 | != SUCCESS) | |
3287 | return FAILURE; | |
3288 | } | |
3289 | else | |
3290 | { | |
3291 | if (set_verify_bind_c_com_block(com_block, num_idents) | |
3292 | != SUCCESS) | |
3293 | return FAILURE; | |
3294 | } | |
3295 | ||
3296 | /* Look to see if we have another identifier. */ | |
3297 | tmp_sym = NULL; | |
3298 | if (gfc_match_eos () == MATCH_YES) | |
3299 | found_id = MATCH_NO; | |
3300 | else if (gfc_match_char (',') != MATCH_YES) | |
3301 | found_id = MATCH_NO; | |
3302 | else if (gfc_match_name (name) == MATCH_YES) | |
3303 | { | |
3304 | found_id = MATCH_YES; | |
3305 | gfc_get_ha_symbol (name, &tmp_sym); | |
3306 | } | |
3307 | else if (match_common_name (name) == MATCH_YES) | |
3308 | { | |
3309 | found_id = MATCH_YES; | |
3310 | com_block = gfc_get_common (name, 0); | |
3311 | } | |
3312 | else | |
3313 | { | |
3314 | gfc_error ("Missing entity or common block name for " | |
3315 | "attribute specification statement at %C"); | |
3316 | return FAILURE; | |
3317 | } | |
3318 | } | |
3319 | else | |
3320 | { | |
3321 | gfc_internal_error ("Missing symbol"); | |
3322 | } | |
3323 | } while (found_id == MATCH_YES); | |
3324 | ||
3325 | /* if we get here we were successful */ | |
3326 | return SUCCESS; | |
3327 | } | |
3328 | ||
3329 | ||
3330 | /* Try and match a BIND(C) attribute specification statement. */ | |
3331 | ||
3332 | match | |
3333 | gfc_match_bind_c_stmt (void) | |
3334 | { | |
3335 | match found_match = MATCH_NO; | |
3336 | gfc_typespec *ts; | |
3337 | ||
3338 | ts = ¤t_ts; | |
3339 | ||
3340 | /* This may not be necessary. */ | |
3341 | gfc_clear_ts (ts); | |
3342 | /* Clear the temporary binding label holder. */ | |
3343 | curr_binding_label[0] = '\0'; | |
3344 | ||
3345 | /* Look for the bind(c). */ | |
3346 | found_match = gfc_match_bind_c (NULL); | |
3347 | ||
3348 | if (found_match == MATCH_YES) | |
3349 | { | |
3350 | /* Look for the :: now, but it is not required. */ | |
3351 | gfc_match (" :: "); | |
3352 | ||
3353 | /* Get the identifier(s) that needs to be updated. This may need to | |
3354 | change to hand the flag(s) for the attr specified so all identifiers | |
3355 | found can have all appropriate parts updated (assuming that the same | |
3356 | spec stmt can have multiple attrs, such as both bind(c) and | |
3357 | allocatable...). */ | |
3358 | if (get_bind_c_idents () != SUCCESS) | |
3359 | /* Error message should have printed already. */ | |
3360 | return MATCH_ERROR; | |
3361 | } | |
3362 | ||
3363 | return found_match; | |
3364 | } | |
3365 | ||
3366 | ||
4ee9c684 | 3367 | /* Match a data declaration statement. */ |
3368 | ||
3369 | match | |
3370 | gfc_match_data_decl (void) | |
3371 | { | |
3372 | gfc_symbol *sym; | |
3373 | match m; | |
3923b69f | 3374 | int elem; |
4ee9c684 | 3375 | |
c5d33754 | 3376 | num_idents_on_line = 0; |
3377 | ||
39351103 | 3378 | m = match_type_spec (¤t_ts, 0); |
4ee9c684 | 3379 | if (m != MATCH_YES) |
3380 | return m; | |
3381 | ||
3382 | if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) | |
3383 | { | |
3384 | sym = gfc_use_derived (current_ts.derived); | |
3385 | ||
3386 | if (sym == NULL) | |
3387 | { | |
3388 | m = MATCH_ERROR; | |
3389 | goto cleanup; | |
3390 | } | |
3391 | ||
3392 | current_ts.derived = sym; | |
3393 | } | |
3394 | ||
3395 | m = match_attr_spec (); | |
3396 | if (m == MATCH_ERROR) | |
3397 | { | |
3398 | m = MATCH_NO; | |
3399 | goto cleanup; | |
3400 | } | |
3401 | ||
3402 | if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL) | |
3403 | { | |
3404 | ||
3405 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
3406 | goto ok; | |
3407 | ||
40cf8078 | 3408 | gfc_find_symbol (current_ts.derived->name, |
1a9745d2 | 3409 | current_ts.derived->ns->parent, 1, &sym); |
4ee9c684 | 3410 | |
40cf8078 | 3411 | /* Any symbol that we find had better be a type definition |
1a9745d2 | 3412 | which has its components defined. */ |
40cf8078 | 3413 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
1a9745d2 | 3414 | && current_ts.derived->components != NULL) |
4ee9c684 | 3415 | goto ok; |
3416 | ||
40cf8078 | 3417 | /* Now we have an error, which we signal, and then fix up |
3418 | because the knock-on is plain and simple confusing. */ | |
3419 | gfc_error_now ("Derived type at %C has not been previously defined " | |
1a9745d2 | 3420 | "and so cannot appear in a derived type definition"); |
40cf8078 | 3421 | current_attr.pointer = 1; |
3422 | goto ok; | |
4ee9c684 | 3423 | } |
3424 | ||
3425 | ok: | |
3426 | /* If we have an old-style character declaration, and no new-style | |
3427 | attribute specifications, then there a comma is optional between | |
3428 | the type specification and the variable list. */ | |
3429 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
3430 | gfc_match_char (','); | |
3431 | ||
3923b69f | 3432 | /* Give the types/attributes to symbols that follow. Give the element |
3433 | a number so that repeat character length expressions can be copied. */ | |
3434 | elem = 1; | |
4ee9c684 | 3435 | for (;;) |
3436 | { | |
c5d33754 | 3437 | num_idents_on_line++; |
3923b69f | 3438 | m = variable_decl (elem++); |
4ee9c684 | 3439 | if (m == MATCH_ERROR) |
3440 | goto cleanup; | |
3441 | if (m == MATCH_NO) | |
3442 | break; | |
3443 | ||
3444 | if (gfc_match_eos () == MATCH_YES) | |
3445 | goto cleanup; | |
3446 | if (gfc_match_char (',') != MATCH_YES) | |
3447 | break; | |
3448 | } | |
3449 | ||
8f0bdb23 | 3450 | if (gfc_error_flag_test () == 0) |
3451 | gfc_error ("Syntax error in data declaration at %C"); | |
4ee9c684 | 3452 | m = MATCH_ERROR; |
3453 | ||
af29c1f0 | 3454 | gfc_free_data_all (gfc_current_ns); |
3455 | ||
4ee9c684 | 3456 | cleanup: |
3457 | gfc_free_array_spec (current_as); | |
3458 | current_as = NULL; | |
3459 | return m; | |
3460 | } | |
3461 | ||
3462 | ||
3463 | /* Match a prefix associated with a function or subroutine | |
3464 | declaration. If the typespec pointer is nonnull, then a typespec | |
3465 | can be matched. Note that if nothing matches, MATCH_YES is | |
3466 | returned (the null string was matched). */ | |
3467 | ||
3468 | static match | |
1a9745d2 | 3469 | match_prefix (gfc_typespec *ts) |
4ee9c684 | 3470 | { |
3471 | int seen_type; | |
3472 | ||
3473 | gfc_clear_attr (¤t_attr); | |
3474 | seen_type = 0; | |
3475 | ||
3476 | loop: | |
3477 | if (!seen_type && ts != NULL | |
39351103 | 3478 | && match_type_spec (ts, 0) == MATCH_YES |
4ee9c684 | 3479 | && gfc_match_space () == MATCH_YES) |
3480 | { | |
3481 | ||
3482 | seen_type = 1; | |
3483 | goto loop; | |
3484 | } | |
3485 | ||
3486 | if (gfc_match ("elemental% ") == MATCH_YES) | |
3487 | { | |
3488 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
3489 | return MATCH_ERROR; | |
3490 | ||
3491 | goto loop; | |
3492 | } | |
3493 | ||
3494 | if (gfc_match ("pure% ") == MATCH_YES) | |
3495 | { | |
3496 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
3497 | return MATCH_ERROR; | |
3498 | ||
3499 | goto loop; | |
3500 | } | |
3501 | ||
3502 | if (gfc_match ("recursive% ") == MATCH_YES) | |
3503 | { | |
3504 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
3505 | return MATCH_ERROR; | |
3506 | ||
3507 | goto loop; | |
3508 | } | |
3509 | ||
3510 | /* At this point, the next item is not a prefix. */ | |
3511 | return MATCH_YES; | |
3512 | } | |
3513 | ||
3514 | ||
3515 | /* Copy attributes matched by match_prefix() to attributes on a symbol. */ | |
3516 | ||
3517 | static try | |
1a9745d2 | 3518 | copy_prefix (symbol_attribute *dest, locus *where) |
4ee9c684 | 3519 | { |
4ee9c684 | 3520 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
3521 | return FAILURE; | |
3522 | ||
3523 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
3524 | return FAILURE; | |
3525 | ||
3526 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
3527 | return FAILURE; | |
3528 | ||
3529 | return SUCCESS; | |
3530 | } | |
3531 | ||
3532 | ||
3533 | /* Match a formal argument list. */ | |
3534 | ||
3535 | match | |
1a9745d2 | 3536 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
4ee9c684 | 3537 | { |
3538 | gfc_formal_arglist *head, *tail, *p, *q; | |
3539 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3540 | gfc_symbol *sym; | |
3541 | match m; | |
3542 | ||
3543 | head = tail = NULL; | |
3544 | ||
3545 | if (gfc_match_char ('(') != MATCH_YES) | |
3546 | { | |
3547 | if (null_flag) | |
3548 | goto ok; | |
3549 | return MATCH_NO; | |
3550 | } | |
3551 | ||
3552 | if (gfc_match_char (')') == MATCH_YES) | |
3553 | goto ok; | |
3554 | ||
3555 | for (;;) | |
3556 | { | |
3557 | if (gfc_match_char ('*') == MATCH_YES) | |
3558 | sym = NULL; | |
3559 | else | |
3560 | { | |
3561 | m = gfc_match_name (name); | |
3562 | if (m != MATCH_YES) | |
3563 | goto cleanup; | |
3564 | ||
3565 | if (gfc_get_symbol (name, NULL, &sym)) | |
3566 | goto cleanup; | |
3567 | } | |
3568 | ||
3569 | p = gfc_get_formal_arglist (); | |
3570 | ||
3571 | if (head == NULL) | |
3572 | head = tail = p; | |
3573 | else | |
3574 | { | |
3575 | tail->next = p; | |
3576 | tail = p; | |
3577 | } | |
3578 | ||
3579 | tail->sym = sym; | |
3580 | ||
3581 | /* We don't add the VARIABLE flavor because the name could be a | |
1a9745d2 | 3582 | dummy procedure. We don't apply these attributes to formal |
3583 | arguments of statement functions. */ | |
4ee9c684 | 3584 | if (sym != NULL && !st_flag |
950683ed | 3585 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
4ee9c684 | 3586 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
3587 | { | |
3588 | m = MATCH_ERROR; | |
3589 | goto cleanup; | |
3590 | } | |
3591 | ||
3592 | /* The name of a program unit can be in a different namespace, | |
1a9745d2 | 3593 | so check for it explicitly. After the statement is accepted, |
3594 | the name is checked for especially in gfc_get_symbol(). */ | |
4ee9c684 | 3595 | if (gfc_new_block != NULL && sym != NULL |
3596 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
3597 | { | |
3598 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
3599 | sym->name); | |
3600 | m = MATCH_ERROR; | |
3601 | goto cleanup; | |
3602 | } | |
3603 | ||
3604 | if (gfc_match_char (')') == MATCH_YES) | |
3605 | goto ok; | |
3606 | ||
3607 | m = gfc_match_char (','); | |
3608 | if (m != MATCH_YES) | |
3609 | { | |
3610 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
3611 | goto cleanup; | |
3612 | } | |
3613 | } | |
3614 | ||
3615 | ok: | |
3616 | /* Check for duplicate symbols in the formal argument list. */ | |
3617 | if (head != NULL) | |
3618 | { | |
3619 | for (p = head; p->next; p = p->next) | |
3620 | { | |
3621 | if (p->sym == NULL) | |
3622 | continue; | |
3623 | ||
3624 | for (q = p->next; q; q = q->next) | |
3625 | if (p->sym == q->sym) | |
3626 | { | |
1a9745d2 | 3627 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
3628 | "at %C", p->sym->name); | |
4ee9c684 | 3629 | |
3630 | m = MATCH_ERROR; | |
3631 | goto cleanup; | |
3632 | } | |
3633 | } | |
3634 | } | |
3635 | ||
f6d0e37a | 3636 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) |
3637 | == FAILURE) | |
4ee9c684 | 3638 | { |
3639 | m = MATCH_ERROR; | |
3640 | goto cleanup; | |
3641 | } | |
3642 | ||
3643 | return MATCH_YES; | |
3644 | ||
3645 | cleanup: | |
3646 | gfc_free_formal_arglist (head); | |
3647 | return m; | |
3648 | } | |
3649 | ||
3650 | ||
3651 | /* Match a RESULT specification following a function declaration or | |
3652 | ENTRY statement. Also matches the end-of-statement. */ | |
3653 | ||
3654 | static match | |
f6d0e37a | 3655 | match_result (gfc_symbol *function, gfc_symbol **result) |
4ee9c684 | 3656 | { |
3657 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3658 | gfc_symbol *r; | |
3659 | match m; | |
3660 | ||
3661 | if (gfc_match (" result (") != MATCH_YES) | |
3662 | return MATCH_NO; | |
3663 | ||
3664 | m = gfc_match_name (name); | |
3665 | if (m != MATCH_YES) | |
3666 | return m; | |
3667 | ||
c5d33754 | 3668 | /* Get the right paren, and that's it because there could be the |
3669 | bind(c) attribute after the result clause. */ | |
3670 | if (gfc_match_char(')') != MATCH_YES) | |
4ee9c684 | 3671 | { |
c5d33754 | 3672 | /* TODO: should report the missing right paren here. */ |
4ee9c684 | 3673 | return MATCH_ERROR; |
3674 | } | |
3675 | ||
3676 | if (strcmp (function->name, name) == 0) | |
3677 | { | |
1a9745d2 | 3678 | gfc_error ("RESULT variable at %C must be different than function name"); |
4ee9c684 | 3679 | return MATCH_ERROR; |
3680 | } | |
3681 | ||
3682 | if (gfc_get_symbol (name, NULL, &r)) | |
3683 | return MATCH_ERROR; | |
3684 | ||
950683ed | 3685 | if (gfc_add_flavor (&r->attr, FL_VARIABLE, r->name, NULL) == FAILURE |
3686 | || gfc_add_result (&r->attr, r->name, NULL) == FAILURE) | |
4ee9c684 | 3687 | return MATCH_ERROR; |
3688 | ||
3689 | *result = r; | |
3690 | ||
3691 | return MATCH_YES; | |
3692 | } | |
3693 | ||
3694 | ||
c5d33754 | 3695 | /* Match a function suffix, which could be a combination of a result |
3696 | clause and BIND(C), either one, or neither. The draft does not | |
3697 | require them to come in a specific order. */ | |
3698 | ||
3699 | match | |
3700 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) | |
3701 | { | |
3702 | match is_bind_c; /* Found bind(c). */ | |
3703 | match is_result; /* Found result clause. */ | |
3704 | match found_match; /* Status of whether we've found a good match. */ | |
3705 | int peek_char; /* Character we're going to peek at. */ | |
3706 | ||
3707 | /* Initialize to having found nothing. */ | |
3708 | found_match = MATCH_NO; | |
3709 | is_bind_c = MATCH_NO; | |
3710 | is_result = MATCH_NO; | |
3711 | ||
3712 | /* Get the next char to narrow between result and bind(c). */ | |
3713 | gfc_gobble_whitespace (); | |
3714 | peek_char = gfc_peek_char (); | |
3715 | ||
3716 | switch (peek_char) | |
3717 | { | |
3718 | case 'r': | |
3719 | /* Look for result clause. */ | |
3720 | is_result = match_result (sym, result); | |
3721 | if (is_result == MATCH_YES) | |
3722 | { | |
3723 | /* Now see if there is a bind(c) after it. */ | |
3724 | is_bind_c = gfc_match_bind_c (sym); | |
3725 | /* We've found the result clause and possibly bind(c). */ | |
3726 | found_match = MATCH_YES; | |
3727 | } | |
3728 | else | |
3729 | /* This should only be MATCH_ERROR. */ | |
3730 | found_match = is_result; | |
3731 | break; | |
3732 | case 'b': | |
3733 | /* Look for bind(c) first. */ | |
3734 | is_bind_c = gfc_match_bind_c (sym); | |
3735 | if (is_bind_c == MATCH_YES) | |
3736 | { | |
3737 | /* Now see if a result clause followed it. */ | |
3738 | is_result = match_result (sym, result); | |
3739 | found_match = MATCH_YES; | |
3740 | } | |
3741 | else | |
3742 | { | |
3743 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ | |
3744 | found_match = MATCH_ERROR; | |
3745 | } | |
3746 | break; | |
3747 | default: | |
3748 | gfc_error ("Unexpected junk after function declaration at %C"); | |
3749 | found_match = MATCH_ERROR; | |
3750 | break; | |
3751 | } | |
3752 | ||
c5d33754 | 3753 | if (is_bind_c == MATCH_YES) |
3754 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) | |
3755 | == FAILURE) | |
3756 | return MATCH_ERROR; | |
3757 | ||
3758 | return found_match; | |
3759 | } | |
3760 | ||
3761 | ||
af1a34ee | 3762 | /* Match a PROCEDURE declaration (R1211). */ |
3763 | ||
3764 | static match | |
3765 | match_procedure_decl (void) | |
3766 | { | |
3767 | match m; | |
3768 | locus old_loc, entry_loc; | |
3769 | gfc_symbol *sym, *proc_if = NULL; | |
3770 | int num; | |
3771 | ||
3772 | old_loc = entry_loc = gfc_current_locus; | |
3773 | ||
3774 | gfc_clear_ts (¤t_ts); | |
3775 | ||
3776 | if (gfc_match (" (") != MATCH_YES) | |
3777 | { | |
3778 | gfc_current_locus = entry_loc; | |
3779 | return MATCH_NO; | |
3780 | } | |
3781 | ||
3782 | /* Get the type spec. for the procedure interface. */ | |
3783 | old_loc = gfc_current_locus; | |
3784 | m = match_type_spec (¤t_ts, 0); | |
3785 | if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_char () == ')')) | |
3786 | goto got_ts; | |
3787 | ||
3788 | if (m == MATCH_ERROR) | |
3789 | return m; | |
3790 | ||
3791 | gfc_current_locus = old_loc; | |
3792 | ||
3793 | /* Get the name of the procedure or abstract interface | |
3794 | to inherit the interface from. */ | |
3795 | m = gfc_match_symbol (&proc_if, 1); | |
3796 | ||
3797 | if (m == MATCH_NO) | |
3798 | goto syntax; | |
3799 | else if (m == MATCH_ERROR) | |
3800 | return m; | |
3801 | ||
3802 | /* Various interface checks. */ | |
3803 | if (proc_if) | |
3804 | { | |
3805 | if (proc_if->generic) | |
3806 | { | |
3807 | gfc_error ("Interface '%s' at %C may not be generic", proc_if->name); | |
3808 | return MATCH_ERROR; | |
3809 | } | |
3810 | if (proc_if->attr.proc == PROC_ST_FUNCTION) | |
3811 | { | |
3812 | gfc_error ("Interface '%s' at %C may not be a statement function", | |
3813 | proc_if->name); | |
3814 | return MATCH_ERROR; | |
3815 | } | |
3816 | /* Handle intrinsic procedures. */ | |
3817 | if (gfc_intrinsic_name (proc_if->name, 0) | |
3818 | || gfc_intrinsic_name (proc_if->name, 1)) | |
3819 | proc_if->attr.intrinsic = 1; | |
3820 | if (proc_if->attr.intrinsic | |
3821 | && !gfc_intrinsic_actual_ok (proc_if->name, 0)) | |
3822 | { | |
3823 | gfc_error ("Intrinsic procedure '%s' not allowed " | |
3824 | "in PROCEDURE statement at %C", proc_if->name); | |
3825 | return MATCH_ERROR; | |
3826 | } | |
3827 | /* TODO: Allow intrinsics with gfc_intrinsic_actual_ok | |
3828 | (proc_if->name, 0) after PR33162 is fixed. */ | |
3829 | if (proc_if->attr.intrinsic) | |
3830 | { | |
3831 | gfc_error ("Fortran 2003: Support for intrinsic procedure '%s' " | |
3832 | "in PROCEDURE statement at %C not yet implemented " | |
3833 | "in gfortran", proc_if->name); | |
3834 | return MATCH_ERROR; | |
3835 | } | |
3836 | } | |
3837 | ||
3838 | got_ts: | |
3839 | ||
3840 | if (gfc_match (" )") != MATCH_YES) | |
3841 | { | |
3842 | gfc_current_locus = entry_loc; | |
3843 | return MATCH_NO; | |
3844 | } | |
3845 | ||
3846 | /* Parse attributes. */ | |
3847 | m = match_attr_spec(); | |
3848 | if (m == MATCH_ERROR) | |
3849 | return MATCH_ERROR; | |
3850 | ||
3851 | /* Get procedure symbols. */ | |
3852 | for(num=1;;num++) | |
3853 | { | |
3854 | ||
3855 | m = gfc_match_symbol (&sym, 0); | |
3856 | if (m == MATCH_NO) | |
3857 | goto syntax; | |
3858 | else if (m == MATCH_ERROR) | |
3859 | return m; | |
3860 | ||
3861 | /* Add current_attr to the symbol attributes. */ | |
3862 | if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
3863 | return MATCH_ERROR; | |
3864 | ||
3865 | if (sym->attr.is_bind_c) | |
3866 | { | |
3867 | /* Check for C1218. */ | |
3868 | if (!proc_if || !proc_if->attr.is_bind_c) | |
3869 | { | |
3870 | gfc_error ("BIND(C) attribute at %C requires " | |
3871 | "an interface with BIND(C)"); | |
3872 | return MATCH_ERROR; | |
3873 | } | |
3874 | /* Check for C1217. */ | |
3875 | if (has_name_equals && sym->attr.pointer) | |
3876 | { | |
3877 | gfc_error ("BIND(C) procedure with NAME may not have " | |
3878 | "POINTER attribute at %C"); | |
3879 | return MATCH_ERROR; | |
3880 | } | |
3881 | if (has_name_equals && sym->attr.dummy) | |
3882 | { | |
3883 | gfc_error ("Dummy procedure at %C may not have " | |
3884 | "BIND(C) attribute with NAME"); | |
3885 | return MATCH_ERROR; | |
3886 | } | |
3887 | /* Set binding label for BIND(C). */ | |
3888 | if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS) | |
3889 | return MATCH_ERROR; | |
3890 | } | |
3891 | ||
3892 | if (!sym->attr.pointer && gfc_add_external (&sym->attr, NULL) == FAILURE) | |
3893 | return MATCH_ERROR; | |
3894 | if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE) | |
3895 | return MATCH_ERROR; | |
3896 | ||
3897 | /* Set interface. */ | |
3898 | if (proc_if != NULL) | |
3899 | sym->interface = proc_if; | |
3900 | else if (current_ts.type != BT_UNKNOWN) | |
3901 | { | |
3902 | sym->interface = gfc_new_symbol ("", gfc_current_ns); | |
3903 | sym->interface->ts = current_ts; | |
3904 | sym->interface->attr.function = 1; | |
3905 | sym->ts = sym->interface->ts; | |
3906 | sym->attr.function = sym->interface->attr.function; | |
3907 | } | |
3908 | ||
3909 | if (gfc_match_eos () == MATCH_YES) | |
3910 | return MATCH_YES; | |
3911 | if (gfc_match_char (',') != MATCH_YES) | |
3912 | goto syntax; | |
3913 | } | |
3914 | ||
3915 | syntax: | |
3916 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
3917 | return MATCH_ERROR; | |
3918 | } | |
3919 | ||
3920 | ||
3921 | /* Match a PROCEDURE declaration inside an interface (R1206). */ | |
3922 | ||
3923 | static match | |
3924 | match_procedure_in_interface (void) | |
3925 | { | |
3926 | match m; | |
3927 | gfc_symbol *sym; | |
3928 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3929 | ||
3930 | if (current_interface.type == INTERFACE_NAMELESS | |
3931 | || current_interface.type == INTERFACE_ABSTRACT) | |
3932 | { | |
3933 | gfc_error ("PROCEDURE at %C must be in a generic interface"); | |
3934 | return MATCH_ERROR; | |
3935 | } | |
3936 | ||
3937 | for(;;) | |
3938 | { | |
3939 | m = gfc_match_name (name); | |
3940 | if (m == MATCH_NO) | |
3941 | goto syntax; | |
3942 | else if (m == MATCH_ERROR) | |
3943 | return m; | |
3944 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
3945 | return MATCH_ERROR; | |
3946 | ||
3947 | if (gfc_add_interface (sym) == FAILURE) | |
3948 | return MATCH_ERROR; | |
3949 | ||
3950 | sym->attr.procedure = 1; | |
3951 | ||
3952 | if (gfc_match_eos () == MATCH_YES) | |
3953 | break; | |
3954 | if (gfc_match_char (',') != MATCH_YES) | |
3955 | goto syntax; | |
3956 | } | |
3957 | ||
3958 | return MATCH_YES; | |
3959 | ||
3960 | syntax: | |
3961 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
3962 | return MATCH_ERROR; | |
3963 | } | |
3964 | ||
3965 | ||
3966 | /* General matcher for PROCEDURE declarations. */ | |
3967 | ||
3968 | match | |
3969 | gfc_match_procedure (void) | |
3970 | { | |
3971 | match m; | |
3972 | ||
3973 | switch (gfc_current_state ()) | |
3974 | { | |
3975 | case COMP_NONE: | |
3976 | case COMP_PROGRAM: | |
3977 | case COMP_MODULE: | |
3978 | case COMP_SUBROUTINE: | |
3979 | case COMP_FUNCTION: | |
3980 | m = match_procedure_decl (); | |
3981 | break; | |
3982 | case COMP_INTERFACE: | |
3983 | m = match_procedure_in_interface (); | |
3984 | break; | |
3985 | case COMP_DERIVED: | |
3986 | gfc_error ("Fortran 2003: Procedure components at %C are " | |
3987 | "not yet implemented in gfortran"); | |
3988 | return MATCH_ERROR; | |
3989 | default: | |
3990 | return MATCH_NO; | |
3991 | } | |
3992 | ||
3993 | if (m != MATCH_YES) | |
3994 | return m; | |
3995 | ||
3996 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C") | |
3997 | == FAILURE) | |
3998 | return MATCH_ERROR; | |
3999 | ||
4000 | return m; | |
4001 | } | |
4002 | ||
4003 | ||
4ee9c684 | 4004 | /* Match a function declaration. */ |
4005 | ||
4006 | match | |
4007 | gfc_match_function_decl (void) | |
4008 | { | |
4009 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4010 | gfc_symbol *sym, *result; | |
4011 | locus old_loc; | |
4012 | match m; | |
c5d33754 | 4013 | match suffix_match; |
4014 | match found_match; /* Status returned by match func. */ | |
4ee9c684 | 4015 | |
4016 | if (gfc_current_state () != COMP_NONE | |
4017 | && gfc_current_state () != COMP_INTERFACE | |
4018 | && gfc_current_state () != COMP_CONTAINS) | |
4019 | return MATCH_NO; | |
4020 | ||
4021 | gfc_clear_ts (¤t_ts); | |
4022 | ||
cbb9e6aa | 4023 | old_loc = gfc_current_locus; |
4ee9c684 | 4024 | |
4025 | m = match_prefix (¤t_ts); | |
4026 | if (m != MATCH_YES) | |
4027 | { | |
cbb9e6aa | 4028 | gfc_current_locus = old_loc; |
4ee9c684 | 4029 | return m; |
4030 | } | |
4031 | ||
4032 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
4033 | { | |
cbb9e6aa | 4034 | gfc_current_locus = old_loc; |
4ee9c684 | 4035 | return MATCH_NO; |
4036 | } | |
d77f260f | 4037 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 4038 | return MATCH_ERROR; |
4039 | gfc_new_block = sym; | |
4040 | ||
4041 | m = gfc_match_formal_arglist (sym, 0, 0); | |
4042 | if (m == MATCH_NO) | |
9b435b6d | 4043 | { |
4044 | gfc_error ("Expected formal argument list in function " | |
1a9745d2 | 4045 | "definition at %C"); |
9b435b6d | 4046 | m = MATCH_ERROR; |
4047 | goto cleanup; | |
4048 | } | |
4ee9c684 | 4049 | else if (m == MATCH_ERROR) |
4050 | goto cleanup; | |
4051 | ||
4052 | result = NULL; | |
4053 | ||
c5d33754 | 4054 | /* According to the draft, the bind(c) and result clause can |
4055 | come in either order after the formal_arg_list (i.e., either | |
4056 | can be first, both can exist together or by themselves or neither | |
4057 | one). Therefore, the match_result can't match the end of the | |
4058 | string, and check for the bind(c) or result clause in either order. */ | |
4059 | found_match = gfc_match_eos (); | |
4060 | ||
4061 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
4062 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4063 | not allowed for procedures. */ | |
4064 | if (sym->attr.is_bind_c == 1) | |
4065 | { | |
4066 | sym->attr.is_bind_c = 0; | |
4067 | if (sym->old_symbol != NULL) | |
4068 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4069 | "variables or common blocks", | |
4070 | &(sym->old_symbol->declared_at)); | |
4071 | else | |
4072 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4073 | "variables or common blocks", &gfc_current_locus); | |
4ee9c684 | 4074 | } |
4075 | ||
c5d33754 | 4076 | if (found_match != MATCH_YES) |
4ee9c684 | 4077 | { |
c5d33754 | 4078 | /* If we haven't found the end-of-statement, look for a suffix. */ |
4079 | suffix_match = gfc_match_suffix (sym, &result); | |
4080 | if (suffix_match == MATCH_YES) | |
4081 | /* Need to get the eos now. */ | |
4082 | found_match = gfc_match_eos (); | |
4083 | else | |
4084 | found_match = suffix_match; | |
4ee9c684 | 4085 | } |
4086 | ||
c5d33754 | 4087 | if(found_match != MATCH_YES) |
4088 | m = MATCH_ERROR; | |
4ee9c684 | 4089 | else |
4090 | { | |
c5d33754 | 4091 | /* Make changes to the symbol. */ |
4092 | m = MATCH_ERROR; | |
4093 | ||
4094 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) | |
4095 | goto cleanup; | |
4096 | ||
4097 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
4098 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4099 | goto cleanup; | |
4ee9c684 | 4100 | |
c5d33754 | 4101 | if (current_ts.type != BT_UNKNOWN && sym->ts.type != BT_UNKNOWN |
4102 | && !sym->attr.implicit_type) | |
4103 | { | |
4104 | gfc_error ("Function '%s' at %C already has a type of %s", name, | |
4105 | gfc_basic_typename (sym->ts.type)); | |
4106 | goto cleanup; | |
4107 | } | |
4108 | ||
4109 | if (result == NULL) | |
4110 | { | |
4111 | sym->ts = current_ts; | |
4112 | sym->result = sym; | |
4113 | } | |
4114 | else | |
4115 | { | |
4116 | result->ts = current_ts; | |
4117 | sym->result = result; | |
4118 | } | |
4119 | ||
4120 | return MATCH_YES; | |
4121 | } | |
4ee9c684 | 4122 | |
4123 | cleanup: | |
cbb9e6aa | 4124 | gfc_current_locus = old_loc; |
4ee9c684 | 4125 | return m; |
4126 | } | |
4127 | ||
1a9745d2 | 4128 | |
4129 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
4130 | pass the name of the entry, rather than the gfc_current_block name, and | |
4131 | to return false upon finding an existing global entry. */ | |
858f9894 | 4132 | |
4133 | static bool | |
1a9745d2 | 4134 | add_global_entry (const char *name, int sub) |
858f9894 | 4135 | { |
4136 | gfc_gsymbol *s; | |
4137 | ||
4138 | s = gfc_get_gsymbol(name); | |
4139 | ||
4140 | if (s->defined | |
1a9745d2 | 4141 | || (s->type != GSYM_UNKNOWN |
4142 | && s->type != (sub ? GSYM_SUBROUTINE : GSYM_FUNCTION))) | |
858f9894 | 4143 | global_used(s, NULL); |
4144 | else | |
4145 | { | |
4146 | s->type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; | |
4147 | s->where = gfc_current_locus; | |
4148 | s->defined = 1; | |
4149 | return true; | |
4150 | } | |
4151 | return false; | |
4152 | } | |
4ee9c684 | 4153 | |
1a9745d2 | 4154 | |
4ee9c684 | 4155 | /* Match an ENTRY statement. */ |
4156 | ||
4157 | match | |
4158 | gfc_match_entry (void) | |
4159 | { | |
1b716045 | 4160 | gfc_symbol *proc; |
4161 | gfc_symbol *result; | |
4162 | gfc_symbol *entry; | |
4ee9c684 | 4163 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
4164 | gfc_compile_state state; | |
4165 | match m; | |
1b716045 | 4166 | gfc_entry_list *el; |
7b5e1acc | 4167 | locus old_loc; |
d77f260f | 4168 | bool module_procedure; |
4ee9c684 | 4169 | |
4170 | m = gfc_match_name (name); | |
4171 | if (m != MATCH_YES) | |
4172 | return m; | |
4173 | ||
1b716045 | 4174 | state = gfc_current_state (); |
ea37f786 | 4175 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
1b716045 | 4176 | { |
ea37f786 | 4177 | switch (state) |
4178 | { | |
4179 | case COMP_PROGRAM: | |
4180 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
4181 | break; | |
4182 | case COMP_MODULE: | |
4183 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
4184 | break; | |
4185 | case COMP_BLOCK_DATA: | |
1a9745d2 | 4186 | gfc_error ("ENTRY statement at %C cannot appear within " |
4187 | "a BLOCK DATA"); | |
ea37f786 | 4188 | break; |
4189 | case COMP_INTERFACE: | |
1a9745d2 | 4190 | gfc_error ("ENTRY statement at %C cannot appear within " |
4191 | "an INTERFACE"); | |
ea37f786 | 4192 | break; |
4193 | case COMP_DERIVED: | |
1a9745d2 | 4194 | gfc_error ("ENTRY statement at %C cannot appear within " |
4195 | "a DERIVED TYPE block"); | |
ea37f786 | 4196 | break; |
4197 | case COMP_IF: | |
1a9745d2 | 4198 | gfc_error ("ENTRY statement at %C cannot appear within " |
4199 | "an IF-THEN block"); | |
ea37f786 | 4200 | break; |
4201 | case COMP_DO: | |
1a9745d2 | 4202 | gfc_error ("ENTRY statement at %C cannot appear within " |
4203 | "a DO block"); | |
ea37f786 | 4204 | break; |
4205 | case COMP_SELECT: | |
1a9745d2 | 4206 | gfc_error ("ENTRY statement at %C cannot appear within " |
4207 | "a SELECT block"); | |
ea37f786 | 4208 | break; |
4209 | case COMP_FORALL: | |
1a9745d2 | 4210 | gfc_error ("ENTRY statement at %C cannot appear within " |
4211 | "a FORALL block"); | |
ea37f786 | 4212 | break; |
4213 | case COMP_WHERE: | |
1a9745d2 | 4214 | gfc_error ("ENTRY statement at %C cannot appear within " |
4215 | "a WHERE block"); | |
ea37f786 | 4216 | break; |
4217 | case COMP_CONTAINS: | |
1a9745d2 | 4218 | gfc_error ("ENTRY statement at %C cannot appear within " |
4219 | "a contained subprogram"); | |
ea37f786 | 4220 | break; |
4221 | default: | |
4222 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
4223 | } | |
1b716045 | 4224 | return MATCH_ERROR; |
4225 | } | |
4226 | ||
d77f260f | 4227 | module_procedure = gfc_current_ns->parent != NULL |
1a9745d2 | 4228 | && gfc_current_ns->parent->proc_name |
4229 | && gfc_current_ns->parent->proc_name->attr.flavor | |
4230 | == FL_MODULE; | |
d77f260f | 4231 | |
1b716045 | 4232 | if (gfc_current_ns->parent != NULL |
4233 | && gfc_current_ns->parent->proc_name | |
d77f260f | 4234 | && !module_procedure) |
1b716045 | 4235 | { |
4236 | gfc_error("ENTRY statement at %C cannot appear in a " | |
4237 | "contained procedure"); | |
4238 | return MATCH_ERROR; | |
4239 | } | |
4240 | ||
d77f260f | 4241 | /* Module function entries need special care in get_proc_name |
4242 | because previous references within the function will have | |
4243 | created symbols attached to the current namespace. */ | |
4244 | if (get_proc_name (name, &entry, | |
4245 | gfc_current_ns->parent != NULL | |
4246 | && module_procedure | |
4247 | && gfc_current_ns->proc_name->attr.function)) | |
4ee9c684 | 4248 | return MATCH_ERROR; |
4249 | ||
1b716045 | 4250 | proc = gfc_current_block (); |
4251 | ||
4252 | if (state == COMP_SUBROUTINE) | |
4ee9c684 | 4253 | { |
950683ed | 4254 | /* An entry in a subroutine. */ |
858f9894 | 4255 | if (!add_global_entry (name, 1)) |
4256 | return MATCH_ERROR; | |
4257 | ||
4ee9c684 | 4258 | m = gfc_match_formal_arglist (entry, 0, 1); |
4259 | if (m != MATCH_YES) | |
4260 | return MATCH_ERROR; | |
4261 | ||
950683ed | 4262 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4263 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 4264 | return MATCH_ERROR; |
1b716045 | 4265 | } |
4266 | else | |
4267 | { | |
7b5e1acc | 4268 | /* An entry in a function. |
1a9745d2 | 4269 | We need to take special care because writing |
4270 | ENTRY f() | |
4271 | as | |
4272 | ENTRY f | |
4273 | is allowed, whereas | |
4274 | ENTRY f() RESULT (r) | |
4275 | can't be written as | |
4276 | ENTRY f RESULT (r). */ | |
858f9894 | 4277 | if (!add_global_entry (name, 0)) |
4278 | return MATCH_ERROR; | |
4279 | ||
7b5e1acc | 4280 | old_loc = gfc_current_locus; |
4281 | if (gfc_match_eos () == MATCH_YES) | |
4282 | { | |
4283 | gfc_current_locus = old_loc; | |
4284 | /* Match the empty argument list, and add the interface to | |
4285 | the symbol. */ | |
4286 | m = gfc_match_formal_arglist (entry, 0, 1); | |
4287 | } | |
4288 | else | |
4289 | m = gfc_match_formal_arglist (entry, 0, 0); | |
4290 | ||
4ee9c684 | 4291 | if (m != MATCH_YES) |
4292 | return MATCH_ERROR; | |
4293 | ||
4ee9c684 | 4294 | result = NULL; |
4295 | ||
4296 | if (gfc_match_eos () == MATCH_YES) | |
4297 | { | |
950683ed | 4298 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4299 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 4300 | return MATCH_ERROR; |
4301 | ||
c6871095 | 4302 | entry->result = entry; |
4ee9c684 | 4303 | } |
4304 | else | |
4305 | { | |
1b716045 | 4306 | m = match_result (proc, &result); |
4ee9c684 | 4307 | if (m == MATCH_NO) |
4308 | gfc_syntax_error (ST_ENTRY); | |
4309 | if (m != MATCH_YES) | |
4310 | return MATCH_ERROR; | |
4311 | ||
950683ed | 4312 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE |
4313 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
1a9745d2 | 4314 | || gfc_add_function (&entry->attr, result->name, NULL) |
4315 | == FAILURE) | |
4ee9c684 | 4316 | return MATCH_ERROR; |
c6871095 | 4317 | |
4318 | entry->result = result; | |
4ee9c684 | 4319 | } |
4ee9c684 | 4320 | } |
4321 | ||
4322 | if (gfc_match_eos () != MATCH_YES) | |
4323 | { | |
4324 | gfc_syntax_error (ST_ENTRY); | |
4325 | return MATCH_ERROR; | |
4326 | } | |
4327 | ||
1b716045 | 4328 | entry->attr.recursive = proc->attr.recursive; |
4329 | entry->attr.elemental = proc->attr.elemental; | |
4330 | entry->attr.pure = proc->attr.pure; | |
4ee9c684 | 4331 | |
1b716045 | 4332 | el = gfc_get_entry_list (); |
4333 | el->sym = entry; | |
4334 | el->next = gfc_current_ns->entries; | |
4335 | gfc_current_ns->entries = el; | |
4336 | if (el->next) | |
4337 | el->id = el->next->id + 1; | |
4338 | else | |
4339 | el->id = 1; | |
4ee9c684 | 4340 | |
1b716045 | 4341 | new_st.op = EXEC_ENTRY; |
4342 | new_st.ext.entry = el; | |
4343 | ||
4344 | return MATCH_YES; | |
4ee9c684 | 4345 | } |
4346 | ||
4347 | ||
4348 | /* Match a subroutine statement, including optional prefixes. */ | |
4349 | ||
4350 | match | |
4351 | gfc_match_subroutine (void) | |
4352 | { | |
4353 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4354 | gfc_symbol *sym; | |
4355 | match m; | |
c5d33754 | 4356 | match is_bind_c; |
4357 | char peek_char; | |
4ee9c684 | 4358 | |
4359 | if (gfc_current_state () != COMP_NONE | |
4360 | && gfc_current_state () != COMP_INTERFACE | |
4361 | && gfc_current_state () != COMP_CONTAINS) | |
4362 | return MATCH_NO; | |
4363 | ||
4364 | m = match_prefix (NULL); | |
4365 | if (m != MATCH_YES) | |
4366 | return m; | |
4367 | ||
4368 | m = gfc_match ("subroutine% %n", name); | |
4369 | if (m != MATCH_YES) | |
4370 | return m; | |
4371 | ||
d77f260f | 4372 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 4373 | return MATCH_ERROR; |
4374 | gfc_new_block = sym; | |
4375 | ||
c5d33754 | 4376 | /* Check what next non-whitespace character is so we can tell if there |
4377 | where the required parens if we have a BIND(C). */ | |
4378 | gfc_gobble_whitespace (); | |
4379 | peek_char = gfc_peek_char (); | |
4380 | ||
950683ed | 4381 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
4ee9c684 | 4382 | return MATCH_ERROR; |
4383 | ||
4384 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
4385 | return MATCH_ERROR; | |
4386 | ||
c5d33754 | 4387 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
4388 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4389 | not allowed for procedures. */ | |
4390 | if (sym->attr.is_bind_c == 1) | |
4391 | { | |
4392 | sym->attr.is_bind_c = 0; | |
4393 | if (sym->old_symbol != NULL) | |
4394 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4395 | "variables or common blocks", | |
4396 | &(sym->old_symbol->declared_at)); | |
4397 | else | |
4398 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4399 | "variables or common blocks", &gfc_current_locus); | |
4400 | } | |
4401 | ||
4402 | /* Here, we are just checking if it has the bind(c) attribute, and if | |
4403 | so, then we need to make sure it's all correct. If it doesn't, | |
4404 | we still need to continue matching the rest of the subroutine line. */ | |
4405 | is_bind_c = gfc_match_bind_c (sym); | |
4406 | if (is_bind_c == MATCH_ERROR) | |
4407 | { | |
4408 | /* There was an attempt at the bind(c), but it was wrong. An | |
4409 | error message should have been printed w/in the gfc_match_bind_c | |
4410 | so here we'll just return the MATCH_ERROR. */ | |
4411 | return MATCH_ERROR; | |
4412 | } | |
4413 | ||
4414 | if (is_bind_c == MATCH_YES) | |
4415 | { | |
4416 | if (peek_char != '(') | |
4417 | { | |
4418 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
4419 | return MATCH_ERROR; | |
4420 | } | |
4421 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) | |
4422 | == FAILURE) | |
4423 | return MATCH_ERROR; | |
4424 | } | |
4425 | ||
4ee9c684 | 4426 | if (gfc_match_eos () != MATCH_YES) |
4427 | { | |
4428 | gfc_syntax_error (ST_SUBROUTINE); | |
4429 | return MATCH_ERROR; | |
4430 | } | |
4431 | ||
4432 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4433 | return MATCH_ERROR; | |
4434 | ||
4435 | return MATCH_YES; | |
4436 | } | |
4437 | ||
4438 | ||
c5d33754 | 4439 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
4440 | given, and set the binding label in either the given symbol (if not | |
a0527218 | 4441 | NULL), or in the current_ts. The symbol may be NULL because we may |
c5d33754 | 4442 | encounter the BIND(C) before the declaration itself. Return |
4443 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, | |
4444 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, | |
4445 | or MATCH_YES if the specifier was correct and the binding label and | |
4446 | bind(c) fields were set correctly for the given symbol or the | |
4447 | current_ts. */ | |
4448 | ||
4449 | match | |
4450 | gfc_match_bind_c (gfc_symbol *sym) | |
4451 | { | |
4452 | /* binding label, if exists */ | |
4453 | char binding_label[GFC_MAX_SYMBOL_LEN + 1]; | |
4454 | match double_quote; | |
4455 | match single_quote; | |
c5d33754 | 4456 | |
4457 | /* Initialize the flag that specifies whether we encountered a NAME= | |
4458 | specifier or not. */ | |
4459 | has_name_equals = 0; | |
4460 | ||
4461 | /* Init the first char to nil so we can catch if we don't have | |
4462 | the label (name attr) or the symbol name yet. */ | |
4463 | binding_label[0] = '\0'; | |
4464 | ||
4465 | /* This much we have to be able to match, in this order, if | |
4466 | there is a bind(c) label. */ | |
4467 | if (gfc_match (" bind ( c ") != MATCH_YES) | |
4468 | return MATCH_NO; | |
4469 | ||
4470 | /* Now see if there is a binding label, or if we've reached the | |
4471 | end of the bind(c) attribute without one. */ | |
4472 | if (gfc_match_char (',') == MATCH_YES) | |
4473 | { | |
4474 | if (gfc_match (" name = ") != MATCH_YES) | |
4475 | { | |
4476 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
4477 | "at %C"); | |
4478 | /* should give an error message here */ | |
4479 | return MATCH_ERROR; | |
4480 | } | |
4481 | ||
4482 | has_name_equals = 1; | |
4483 | ||
4484 | /* Get the opening quote. */ | |
4485 | double_quote = MATCH_YES; | |
4486 | single_quote = MATCH_YES; | |
4487 | double_quote = gfc_match_char ('"'); | |
4488 | if (double_quote != MATCH_YES) | |
4489 | single_quote = gfc_match_char ('\''); | |
4490 | if (double_quote != MATCH_YES && single_quote != MATCH_YES) | |
4491 | { | |
4492 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
4493 | "at %C"); | |
4494 | return MATCH_ERROR; | |
4495 | } | |
4496 | ||
4497 | /* Grab the binding label, using functions that will not lower | |
4498 | case the names automatically. */ | |
4499 | if (gfc_match_name_C (binding_label) != MATCH_YES) | |
4500 | return MATCH_ERROR; | |
4501 | ||
4502 | /* Get the closing quotation. */ | |
4503 | if (double_quote == MATCH_YES) | |
4504 | { | |
4505 | if (gfc_match_char ('"') != MATCH_YES) | |
4506 | { | |
4507 | gfc_error ("Missing closing quote '\"' for binding label at %C"); | |
4508 | /* User started string with '"' so looked to match it. */ | |
4509 | return MATCH_ERROR; | |
4510 | } | |
4511 | } | |
4512 | else | |
4513 | { | |
4514 | if (gfc_match_char ('\'') != MATCH_YES) | |
4515 | { | |
4516 | gfc_error ("Missing closing quote '\'' for binding label at %C"); | |
4517 | /* User started string with "'" char. */ | |
4518 | return MATCH_ERROR; | |
4519 | } | |
4520 | } | |
4521 | } | |
4522 | ||
4523 | /* Get the required right paren. */ | |
4524 | if (gfc_match_char (')') != MATCH_YES) | |
4525 | { | |
4526 | gfc_error ("Missing closing paren for binding label at %C"); | |
4527 | return MATCH_ERROR; | |
4528 | } | |
4529 | ||
4530 | /* Save the binding label to the symbol. If sym is null, we're | |
4531 | probably matching the typespec attributes of a declaration and | |
4532 | haven't gotten the name yet, and therefore, no symbol yet. */ | |
4533 | if (binding_label[0] != '\0') | |
4534 | { | |
4535 | if (sym != NULL) | |
4536 | { | |
4537 | strncpy (sym->binding_label, binding_label, | |
4538 | strlen (binding_label)+1); | |
4539 | } | |
4540 | else | |
4541 | strncpy (curr_binding_label, binding_label, | |
4542 | strlen (binding_label) + 1); | |
4543 | } | |
4544 | else | |
4545 | { | |
4546 | /* No binding label, but if symbol isn't null, we | |
4547 | can set the label for it here. */ | |
4548 | /* TODO: If the name= was given and no binding label (name=""), we simply | |
4549 | will let fortran mangle the symbol name as it usually would. | |
4550 | However, this could still let C call it if the user looked up the | |
4551 | symbol in the object file. Should the name set during mangling in | |
4552 | trans-decl.c be marked with characters that are invalid for C to | |
4553 | prevent this? */ | |
4554 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) | |
4555 | strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1); | |
4556 | } | |
94fa7146 | 4557 | |
5cf92482 | 4558 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
4559 | && current_interface.type == INTERFACE_ABSTRACT) | |
94fa7146 | 4560 | { |
4561 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); | |
4562 | return MATCH_ERROR; | |
4563 | } | |
4564 | ||
c5d33754 | 4565 | return MATCH_YES; |
4566 | } | |
4567 | ||
4568 | ||
231e961a | 4569 | /* Return nonzero if we're currently compiling a contained procedure. */ |
c0985832 | 4570 | |
4571 | static int | |
4572 | contained_procedure (void) | |
4573 | { | |
4574 | gfc_state_data *s; | |
4575 | ||
4576 | for (s=gfc_state_stack; s; s=s->previous) | |
4577 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) | |
1a9745d2 | 4578 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) |
c0985832 | 4579 | return 1; |
4580 | ||
4581 | return 0; | |
4582 | } | |
4583 | ||
e14bee04 | 4584 | /* Set the kind of each enumerator. The kind is selected such that it is |
3b6a4b41 | 4585 | interoperable with the corresponding C enumeration type, making |
4586 | sure that -fshort-enums is honored. */ | |
4587 | ||
4588 | static void | |
4589 | set_enum_kind(void) | |
4590 | { | |
4591 | enumerator_history *current_history = NULL; | |
4592 | int kind; | |
4593 | int i; | |
4594 | ||
4595 | if (max_enum == NULL || enum_history == NULL) | |
4596 | return; | |
4597 | ||
4598 | if (!gfc_option.fshort_enums) | |
e14bee04 | 4599 | return; |
4600 | ||
3b6a4b41 | 4601 | i = 0; |
4602 | do | |
4603 | { | |
4604 | kind = gfc_integer_kinds[i++].kind; | |
4605 | } | |
e14bee04 | 4606 | while (kind < gfc_c_int_kind |
3b6a4b41 | 4607 | && gfc_check_integer_range (max_enum->initializer->value.integer, |
4608 | kind) != ARITH_OK); | |
4609 | ||
4610 | current_history = enum_history; | |
4611 | while (current_history != NULL) | |
4612 | { | |
4613 | current_history->sym->ts.kind = kind; | |
4614 | current_history = current_history->next; | |
4615 | } | |
4616 | } | |
4617 | ||
1a9745d2 | 4618 | |
4ee9c684 | 4619 | /* Match any of the various end-block statements. Returns the type of |
4620 | END to the caller. The END INTERFACE, END IF, END DO and END | |
4621 | SELECT statements cannot be replaced by a single END statement. */ | |
4622 | ||
4623 | match | |
1a9745d2 | 4624 | gfc_match_end (gfc_statement *st) |
4ee9c684 | 4625 | { |
4626 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4627 | gfc_compile_state state; | |
4628 | locus old_loc; | |
4629 | const char *block_name; | |
4630 | const char *target; | |
c0985832 | 4631 | int eos_ok; |
4ee9c684 | 4632 | match m; |
4633 | ||
cbb9e6aa | 4634 | old_loc = gfc_current_locus; |
4ee9c684 | 4635 | if (gfc_match ("end") != MATCH_YES) |
4636 | return MATCH_NO; | |
4637 | ||
4638 | state = gfc_current_state (); | |
1a9745d2 | 4639 | block_name = gfc_current_block () == NULL |
4640 | ? NULL : gfc_current_block ()->name; | |
4ee9c684 | 4641 | |
4642 | if (state == COMP_CONTAINS) | |
4643 | { | |
4644 | state = gfc_state_stack->previous->state; | |
1a9745d2 | 4645 | block_name = gfc_state_stack->previous->sym == NULL |
4646 | ? NULL : gfc_state_stack->previous->sym->name; | |
4ee9c684 | 4647 | } |
4648 | ||
4649 | switch (state) | |
4650 | { | |
4651 | case COMP_NONE: | |
4652 | case COMP_PROGRAM: | |
4653 | *st = ST_END_PROGRAM; | |
4654 | target = " program"; | |
c0985832 | 4655 | eos_ok = 1; |
4ee9c684 | 4656 | break; |
4657 | ||
4658 | case COMP_SUBROUTINE: | |
4659 | *st = ST_END_SUBROUTINE; | |
4660 | target = " subroutine"; | |
c0985832 | 4661 | eos_ok = !contained_procedure (); |
4ee9c684 | 4662 | break; |
4663 | ||
4664 | case COMP_FUNCTION: | |
4665 | *st = ST_END_FUNCTION; | |
4666 | target = " function"; | |
c0985832 | 4667 | eos_ok = !contained_procedure (); |
4ee9c684 | 4668 | break; |
4669 | ||
4670 | case COMP_BLOCK_DATA: | |
4671 | *st = ST_END_BLOCK_DATA; | |
4672 | target = " block data"; | |
c0985832 | 4673 | eos_ok = 1; |
4ee9c684 | 4674 | break; |
4675 | ||
4676 | case COMP_MODULE: | |
4677 | *st = ST_END_MODULE; | |
4678 | target = " module"; | |
c0985832 | 4679 | eos_ok = 1; |
4ee9c684 | 4680 | break; |
4681 | ||
4682 | case COMP_INTERFACE: | |
4683 | *st = ST_END_INTERFACE; | |
4684 | target = " interface"; | |
c0985832 | 4685 | eos_ok = 0; |
4ee9c684 | 4686 | break; |
4687 | ||
4688 | case COMP_DERIVED: | |
4689 | *st = ST_END_TYPE; | |
4690 | target = " type"; | |
c0985832 | 4691 | eos_ok = 0; |
4ee9c684 | 4692 | break; |
4693 | ||
4694 | case COMP_IF: | |
4695 | *st = ST_ENDIF; | |
4696 | target = " if"; | |
c0985832 | 4697 | eos_ok = 0; |
4ee9c684 | 4698 | break; |
4699 | ||
4700 | case COMP_DO: | |
4701 | *st = ST_ENDDO; | |
4702 | target = " do"; | |
c0985832 | 4703 | eos_ok = 0; |
4ee9c684 | 4704 | break; |
4705 | ||
4706 | case COMP_SELECT: | |
4707 | *st = ST_END_SELECT; | |
4708 | target = " select"; | |
c0985832 | 4709 | eos_ok = 0; |
4ee9c684 | 4710 | break; |
4711 | ||
4712 | case COMP_FORALL: | |
4713 | *st = ST_END_FORALL; | |
4714 | target = " forall"; | |
c0985832 | 4715 | eos_ok = 0; |
4ee9c684 | 4716 | break; |
4717 | ||
4718 | case COMP_WHERE: | |
4719 | *st = ST_END_WHERE; | |
4720 | target = " where"; | |
c0985832 | 4721 | eos_ok = 0; |
4ee9c684 | 4722 | break; |
4723 | ||
3b6a4b41 | 4724 | case COMP_ENUM: |
4725 | *st = ST_END_ENUM; | |
4726 | target = " enum"; | |
4727 | eos_ok = 0; | |
4728 | last_initializer = NULL; | |
4729 | set_enum_kind (); | |
4730 | gfc_free_enum_history (); | |
4731 | break; | |
4732 | ||
4ee9c684 | 4733 | default: |
4734 | gfc_error ("Unexpected END statement at %C"); | |
4735 | goto cleanup; | |
4736 | } | |
4737 | ||
4738 | if (gfc_match_eos () == MATCH_YES) | |
4739 | { | |
c0985832 | 4740 | if (!eos_ok) |
4ee9c684 | 4741 | { |
f6d0e37a | 4742 | /* We would have required END [something]. */ |
d197c9ee | 4743 | gfc_error ("%s statement expected at %L", |
4744 | gfc_ascii_statement (*st), &old_loc); | |
4ee9c684 | 4745 | goto cleanup; |
4746 | } | |
4747 | ||
4748 | return MATCH_YES; | |
4749 | } | |
4750 | ||
4751 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
4752 | if (gfc_match (target) != MATCH_YES) | |
4753 | { | |
4754 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
4755 | goto cleanup; | |
4756 | } | |
4757 | ||
4758 | /* If we're at the end, make sure a block name wasn't required. */ | |
4759 | if (gfc_match_eos () == MATCH_YES) | |
4760 | { | |
4761 | ||
0d0ce415 | 4762 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT |
4763 | && *st != ST_END_FORALL && *st != ST_END_WHERE) | |
4ee9c684 | 4764 | return MATCH_YES; |
4765 | ||
4766 | if (gfc_current_block () == NULL) | |
4767 | return MATCH_YES; | |
4768 | ||
4769 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
4770 | block_name, gfc_ascii_statement (*st)); | |
4771 | ||
4772 | return MATCH_ERROR; | |
4773 | } | |
4774 | ||
4775 | /* END INTERFACE has a special handler for its several possible endings. */ | |
4776 | if (*st == ST_END_INTERFACE) | |
4777 | return gfc_match_end_interface (); | |
4778 | ||
f6d0e37a | 4779 | /* We haven't hit the end of statement, so what is left must be an |
4780 | end-name. */ | |
4ee9c684 | 4781 | m = gfc_match_space (); |
4782 | if (m == MATCH_YES) | |
4783 | m = gfc_match_name (name); | |
4784 | ||
4785 | if (m == MATCH_NO) | |
4786 | gfc_error ("Expected terminating name at %C"); | |
4787 | if (m != MATCH_YES) | |
4788 | goto cleanup; | |
4789 | ||
4790 | if (block_name == NULL) | |
4791 | goto syntax; | |
4792 | ||
4793 | if (strcmp (name, block_name) != 0) | |
4794 | { | |
4795 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
4796 | gfc_ascii_statement (*st)); | |
4797 | goto cleanup; | |
4798 | } | |
4799 | ||
4800 | if (gfc_match_eos () == MATCH_YES) | |
4801 | return MATCH_YES; | |
4802 | ||
4803 | syntax: | |
4804 | gfc_syntax_error (*st); | |
4805 | ||
4806 | cleanup: | |
cbb9e6aa | 4807 | gfc_current_locus = old_loc; |
4ee9c684 | 4808 | return MATCH_ERROR; |
4809 | } | |
4810 | ||
4811 | ||
4812 | ||
4813 | /***************** Attribute declaration statements ****************/ | |
4814 | ||
4815 | /* Set the attribute of a single variable. */ | |
4816 | ||
4817 | static match | |
4818 | attr_decl1 (void) | |
4819 | { | |
4820 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4821 | gfc_array_spec *as; | |
4822 | gfc_symbol *sym; | |
4823 | locus var_locus; | |
4824 | match m; | |
4825 | ||
4826 | as = NULL; | |
4827 | ||
4828 | m = gfc_match_name (name); | |
4829 | if (m != MATCH_YES) | |
4830 | goto cleanup; | |
4831 | ||
4832 | if (find_special (name, &sym)) | |
4833 | return MATCH_ERROR; | |
4834 | ||
cbb9e6aa | 4835 | var_locus = gfc_current_locus; |
4ee9c684 | 4836 | |
4837 | /* Deal with possible array specification for certain attributes. */ | |
4838 | if (current_attr.dimension | |
4839 | || current_attr.allocatable | |
4840 | || current_attr.pointer | |
4841 | || current_attr.target) | |
4842 | { | |
4843 | m = gfc_match_array_spec (&as); | |
4844 | if (m == MATCH_ERROR) | |
4845 | goto cleanup; | |
4846 | ||
4847 | if (current_attr.dimension && m == MATCH_NO) | |
4848 | { | |
1a9745d2 | 4849 | gfc_error ("Missing array specification at %L in DIMENSION " |
4850 | "statement", &var_locus); | |
4ee9c684 | 4851 | m = MATCH_ERROR; |
4852 | goto cleanup; | |
4853 | } | |
4854 | ||
4855 | if ((current_attr.allocatable || current_attr.pointer) | |
4856 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
4857 | { | |
1a9745d2 | 4858 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
4ee9c684 | 4859 | m = MATCH_ERROR; |
4860 | goto cleanup; | |
4861 | } | |
4862 | } | |
4863 | ||
1a9745d2 | 4864 | /* Update symbol table. DIMENSION attribute is set |
4865 | in gfc_set_array_spec(). */ | |
4ee9c684 | 4866 | if (current_attr.dimension == 0 |
4867 | && gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
4868 | { | |
4869 | m = MATCH_ERROR; | |
4870 | goto cleanup; | |
4871 | } | |
4872 | ||
4873 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
4874 | { | |
4875 | m = MATCH_ERROR; | |
4876 | goto cleanup; | |
4877 | } | |
e14bee04 | 4878 | |
b549d2a5 | 4879 | if (sym->attr.cray_pointee && sym->as != NULL) |
4880 | { | |
4881 | /* Fix the array spec. */ | |
4882 | m = gfc_mod_pointee_as (sym->as); | |
4883 | if (m == MATCH_ERROR) | |
4884 | goto cleanup; | |
4885 | } | |
4ee9c684 | 4886 | |
25dd7350 | 4887 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
14efb9b7 | 4888 | { |
4889 | m = MATCH_ERROR; | |
4890 | goto cleanup; | |
4891 | } | |
4892 | ||
4ee9c684 | 4893 | if ((current_attr.external || current_attr.intrinsic) |
4894 | && sym->attr.flavor != FL_PROCEDURE | |
950683ed | 4895 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
4ee9c684 | 4896 | { |
4897 | m = MATCH_ERROR; | |
4898 | goto cleanup; | |
4899 | } | |
4900 | ||
4901 | return MATCH_YES; | |
4902 | ||
4903 | cleanup: | |
4904 | gfc_free_array_spec (as); | |
4905 | return m; | |
4906 | } | |
4907 | ||
4908 | ||
4909 | /* Generic attribute declaration subroutine. Used for attributes that | |
4910 | just have a list of names. */ | |
4911 | ||
4912 | static match | |
4913 | attr_decl (void) | |
4914 | { | |
4915 | match m; | |
4916 | ||
4917 | /* Gobble the optional double colon, by simply ignoring the result | |
4918 | of gfc_match(). */ | |
4919 | gfc_match (" ::"); | |
4920 | ||
4921 | for (;;) | |
4922 | { | |
4923 | m = attr_decl1 (); | |
4924 | if (m != MATCH_YES) | |
4925 | break; | |
4926 | ||
4927 | if (gfc_match_eos () == MATCH_YES) | |
4928 | { | |
4929 | m = MATCH_YES; | |
4930 | break; | |
4931 | } | |
4932 | ||
4933 | if (gfc_match_char (',') != MATCH_YES) | |
4934 | { | |
4935 | gfc_error ("Unexpected character in variable list at %C"); | |
4936 | m = MATCH_ERROR; | |
4937 | break; | |
4938 | } | |
4939 | } | |
4940 | ||
4941 | return m; | |
4942 | } | |
4943 | ||
4944 | ||
b549d2a5 | 4945 | /* This routine matches Cray Pointer declarations of the form: |
4946 | pointer ( <pointer>, <pointee> ) | |
4947 | or | |
e14bee04 | 4948 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
4949 | The pointer, if already declared, should be an integer. Otherwise, we | |
b549d2a5 | 4950 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
4951 | be either a scalar, or an array declaration. No space is allocated for | |
e14bee04 | 4952 | the pointee. For the statement |
b549d2a5 | 4953 | pointer (ipt, ar(10)) |
4954 | any subsequent uses of ar will be translated (in C-notation) as | |
e14bee04 | 4955 | ar(i) => ((<type> *) ipt)(i) |
b7bf3f81 | 4956 | After gimplification, pointee variable will disappear in the code. */ |
b549d2a5 | 4957 | |
4958 | static match | |
4959 | cray_pointer_decl (void) | |
4960 | { | |
4961 | match m; | |
4962 | gfc_array_spec *as; | |
4963 | gfc_symbol *cptr; /* Pointer symbol. */ | |
4964 | gfc_symbol *cpte; /* Pointee symbol. */ | |
4965 | locus var_locus; | |
4966 | bool done = false; | |
4967 | ||
4968 | while (!done) | |
4969 | { | |
4970 | if (gfc_match_char ('(') != MATCH_YES) | |
4971 | { | |
4972 | gfc_error ("Expected '(' at %C"); | |
e14bee04 | 4973 | return MATCH_ERROR; |
b549d2a5 | 4974 | } |
e14bee04 | 4975 | |
b549d2a5 | 4976 | /* Match pointer. */ |
4977 | var_locus = gfc_current_locus; | |
4978 | gfc_clear_attr (¤t_attr); | |
4979 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
4980 | current_ts.type = BT_INTEGER; | |
4981 | current_ts.kind = gfc_index_integer_kind; | |
4982 | ||
e14bee04 | 4983 | m = gfc_match_symbol (&cptr, 0); |
b549d2a5 | 4984 | if (m != MATCH_YES) |
4985 | { | |
4986 | gfc_error ("Expected variable name at %C"); | |
4987 | return m; | |
4988 | } | |
e14bee04 | 4989 | |
b549d2a5 | 4990 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) |
4991 | return MATCH_ERROR; | |
4992 | ||
e14bee04 | 4993 | gfc_set_sym_referenced (cptr); |
b549d2a5 | 4994 | |
4995 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
4996 | { | |
4997 | cptr->ts.type = BT_INTEGER; | |
e14bee04 | 4998 | cptr->ts.kind = gfc_index_integer_kind; |
b549d2a5 | 4999 | } |
5000 | else if (cptr->ts.type != BT_INTEGER) | |
5001 | { | |
7698a624 | 5002 | gfc_error ("Cray pointer at %C must be an integer"); |
b549d2a5 | 5003 | return MATCH_ERROR; |
5004 | } | |
5005 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
5006 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
7698a624 | 5007 | " memory addresses require %d bytes", |
1a9745d2 | 5008 | cptr->ts.kind, gfc_index_integer_kind); |
b549d2a5 | 5009 | |
5010 | if (gfc_match_char (',') != MATCH_YES) | |
5011 | { | |
5012 | gfc_error ("Expected \",\" at %C"); | |
e14bee04 | 5013 | return MATCH_ERROR; |
b549d2a5 | 5014 | } |
5015 | ||
e14bee04 | 5016 | /* Match Pointee. */ |
b549d2a5 | 5017 | var_locus = gfc_current_locus; |
5018 | gfc_clear_attr (¤t_attr); | |
5019 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
5020 | current_ts.type = BT_UNKNOWN; | |
5021 | current_ts.kind = 0; | |
5022 | ||
5023 | m = gfc_match_symbol (&cpte, 0); | |
5024 | if (m != MATCH_YES) | |
5025 | { | |
5026 | gfc_error ("Expected variable name at %C"); | |
5027 | return m; | |
5028 | } | |
e14bee04 | 5029 | |
b549d2a5 | 5030 | /* Check for an optional array spec. */ |
5031 | m = gfc_match_array_spec (&as); | |
5032 | if (m == MATCH_ERROR) | |
5033 | { | |
5034 | gfc_free_array_spec (as); | |
5035 | return m; | |
5036 | } | |
5037 | else if (m == MATCH_NO) | |
5038 | { | |
5039 | gfc_free_array_spec (as); | |
5040 | as = NULL; | |
5041 | } | |
5042 | ||
5043 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
5044 | return MATCH_ERROR; | |
5045 | ||
5046 | gfc_set_sym_referenced (cpte); | |
5047 | ||
5048 | if (cpte->as == NULL) | |
5049 | { | |
5050 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
5051 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
5052 | } | |
5053 | else if (as != NULL) | |
5054 | { | |
7698a624 | 5055 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 5056 | gfc_free_array_spec (as); |
5057 | return MATCH_ERROR; | |
5058 | } | |
5059 | ||
5060 | as = NULL; | |
5061 | ||
5062 | if (cpte->as != NULL) | |
5063 | { | |
5064 | /* Fix array spec. */ | |
5065 | m = gfc_mod_pointee_as (cpte->as); | |
5066 | if (m == MATCH_ERROR) | |
5067 | return m; | |
5068 | } | |
5069 | ||
5070 | /* Point the Pointee at the Pointer. */ | |
b7bf3f81 | 5071 | cpte->cp_pointer = cptr; |
b549d2a5 | 5072 | |
5073 | if (gfc_match_char (')') != MATCH_YES) | |
5074 | { | |
5075 | gfc_error ("Expected \")\" at %C"); | |
5076 | return MATCH_ERROR; | |
5077 | } | |
5078 | m = gfc_match_char (','); | |
5079 | if (m != MATCH_YES) | |
5080 | done = true; /* Stop searching for more declarations. */ | |
5081 | ||
5082 | } | |
5083 | ||
5084 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
5085 | || gfc_match_eos () != MATCH_YES) | |
5086 | { | |
5087 | gfc_error ("Expected \",\" or end of statement at %C"); | |
5088 | return MATCH_ERROR; | |
5089 | } | |
5090 | return MATCH_YES; | |
5091 | } | |
5092 | ||
5093 | ||
4ee9c684 | 5094 | match |
5095 | gfc_match_external (void) | |
5096 | { | |
5097 | ||
5098 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5099 | current_attr.external = 1; |
4ee9c684 | 5100 | |
5101 | return attr_decl (); | |
5102 | } | |
5103 | ||
5104 | ||
4ee9c684 | 5105 | match |
5106 | gfc_match_intent (void) | |
5107 | { | |
5108 | sym_intent intent; | |
5109 | ||
5110 | intent = match_intent_spec (); | |
5111 | if (intent == INTENT_UNKNOWN) | |
5112 | return MATCH_ERROR; | |
5113 | ||
5114 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5115 | current_attr.intent = intent; |
4ee9c684 | 5116 | |
5117 | return attr_decl (); | |
5118 | } | |
5119 | ||
5120 | ||
5121 | match | |
5122 | gfc_match_intrinsic (void) | |
5123 | { | |
5124 | ||
5125 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5126 | current_attr.intrinsic = 1; |
4ee9c684 | 5127 | |
5128 | return attr_decl (); | |
5129 | } | |
5130 | ||
5131 | ||
5132 | match | |
5133 | gfc_match_optional (void) | |
5134 | { | |
5135 | ||
5136 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5137 | current_attr.optional = 1; |
4ee9c684 | 5138 | |
5139 | return attr_decl (); | |
5140 | } | |
5141 | ||
5142 | ||
5143 | match | |
5144 | gfc_match_pointer (void) | |
5145 | { | |
b549d2a5 | 5146 | gfc_gobble_whitespace (); |
5147 | if (gfc_peek_char () == '(') | |
5148 | { | |
5149 | if (!gfc_option.flag_cray_pointer) | |
5150 | { | |
1a9745d2 | 5151 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
5152 | "flag"); | |
b549d2a5 | 5153 | return MATCH_ERROR; |
5154 | } | |
5155 | return cray_pointer_decl (); | |
5156 | } | |
5157 | else | |
5158 | { | |
5159 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5160 | current_attr.pointer = 1; |
b549d2a5 | 5161 | |
5162 | return attr_decl (); | |
5163 | } | |
4ee9c684 | 5164 | } |
5165 | ||
5166 | ||
5167 | match | |
5168 | gfc_match_allocatable (void) | |
5169 | { | |
4ee9c684 | 5170 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5171 | current_attr.allocatable = 1; |
4ee9c684 | 5172 | |
5173 | return attr_decl (); | |
5174 | } | |
5175 | ||
5176 | ||
5177 | match | |
5178 | gfc_match_dimension (void) | |
5179 | { | |
4ee9c684 | 5180 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5181 | current_attr.dimension = 1; |
4ee9c684 | 5182 | |
5183 | return attr_decl (); | |
5184 | } | |
5185 | ||
5186 | ||
5187 | match | |
5188 | gfc_match_target (void) | |
5189 | { | |
4ee9c684 | 5190 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5191 | current_attr.target = 1; |
4ee9c684 | 5192 | |
5193 | return attr_decl (); | |
5194 | } | |
5195 | ||
5196 | ||
5197 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
5198 | statement. */ | |
5199 | ||
5200 | static match | |
5201 | access_attr_decl (gfc_statement st) | |
5202 | { | |
5203 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5204 | interface_type type; | |
5205 | gfc_user_op *uop; | |
5206 | gfc_symbol *sym; | |
5207 | gfc_intrinsic_op operator; | |
5208 | match m; | |
5209 | ||
5210 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5211 | goto done; | |
5212 | ||
5213 | for (;;) | |
5214 | { | |
5215 | m = gfc_match_generic_spec (&type, name, &operator); | |
5216 | if (m == MATCH_NO) | |
5217 | goto syntax; | |
5218 | if (m == MATCH_ERROR) | |
5219 | return MATCH_ERROR; | |
5220 | ||
5221 | switch (type) | |
5222 | { | |
5223 | case INTERFACE_NAMELESS: | |
94fa7146 | 5224 | case INTERFACE_ABSTRACT: |
4ee9c684 | 5225 | goto syntax; |
5226 | ||
5227 | case INTERFACE_GENERIC: | |
5228 | if (gfc_get_symbol (name, NULL, &sym)) | |
5229 | goto done; | |
5230 | ||
1a9745d2 | 5231 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
5232 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
950683ed | 5233 | sym->name, NULL) == FAILURE) |
4ee9c684 | 5234 | return MATCH_ERROR; |
5235 | ||
5236 | break; | |
5237 | ||
5238 | case INTERFACE_INTRINSIC_OP: | |
5239 | if (gfc_current_ns->operator_access[operator] == ACCESS_UNKNOWN) | |
5240 | { | |
5241 | gfc_current_ns->operator_access[operator] = | |
5242 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
5243 | } | |
5244 | else | |
5245 | { | |
5246 | gfc_error ("Access specification of the %s operator at %C has " | |
5247 | "already been specified", gfc_op2string (operator)); | |
5248 | goto done; | |
5249 | } | |
5250 | ||
5251 | break; | |
5252 | ||
5253 | case INTERFACE_USER_OP: | |
5254 | uop = gfc_get_uop (name); | |
5255 | ||
5256 | if (uop->access == ACCESS_UNKNOWN) | |
5257 | { | |
1a9745d2 | 5258 | uop->access = (st == ST_PUBLIC) |
5259 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
4ee9c684 | 5260 | } |
5261 | else | |
5262 | { | |
1a9745d2 | 5263 | gfc_error ("Access specification of the .%s. operator at %C " |
5264 | "has already been specified", sym->name); | |
4ee9c684 | 5265 | goto done; |
5266 | } | |
5267 | ||
5268 | break; | |
5269 | } | |
5270 | ||
5271 | if (gfc_match_char (',') == MATCH_NO) | |
5272 | break; | |
5273 | } | |
5274 | ||
5275 | if (gfc_match_eos () != MATCH_YES) | |
5276 | goto syntax; | |
5277 | return MATCH_YES; | |
5278 | ||
5279 | syntax: | |
5280 | gfc_syntax_error (st); | |
5281 | ||
5282 | done: | |
5283 | return MATCH_ERROR; | |
5284 | } | |
5285 | ||
5286 | ||
3ea52af3 | 5287 | match |
5288 | gfc_match_protected (void) | |
5289 | { | |
5290 | gfc_symbol *sym; | |
5291 | match m; | |
5292 | ||
5293 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
5294 | { | |
5295 | gfc_error ("PROTECTED at %C only allowed in specification " | |
5296 | "part of a module"); | |
5297 | return MATCH_ERROR; | |
5298 | ||
5299 | } | |
5300 | ||
1a9745d2 | 5301 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
3ea52af3 | 5302 | == FAILURE) |
5303 | return MATCH_ERROR; | |
5304 | ||
5305 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5306 | { | |
5307 | return MATCH_ERROR; | |
5308 | } | |
5309 | ||
5310 | if (gfc_match_eos () == MATCH_YES) | |
5311 | goto syntax; | |
5312 | ||
5313 | for(;;) | |
5314 | { | |
5315 | m = gfc_match_symbol (&sym, 0); | |
5316 | switch (m) | |
5317 | { | |
5318 | case MATCH_YES: | |
1a9745d2 | 5319 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
5320 | == FAILURE) | |
3ea52af3 | 5321 | return MATCH_ERROR; |
5322 | goto next_item; | |
5323 | ||
5324 | case MATCH_NO: | |
5325 | break; | |
5326 | ||
5327 | case MATCH_ERROR: | |
5328 | return MATCH_ERROR; | |
5329 | } | |
5330 | ||
5331 | next_item: | |
5332 | if (gfc_match_eos () == MATCH_YES) | |
5333 | break; | |
5334 | if (gfc_match_char (',') != MATCH_YES) | |
5335 | goto syntax; | |
5336 | } | |
5337 | ||
5338 | return MATCH_YES; | |
5339 | ||
5340 | syntax: | |
5341 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
5342 | return MATCH_ERROR; | |
5343 | } | |
5344 | ||
5345 | ||
a0527218 | 5346 | /* The PRIVATE statement is a bit weird in that it can be an attribute |
4ee9c684 | 5347 | declaration, but also works as a standlone statement inside of a |
5348 | type declaration or a module. */ | |
5349 | ||
5350 | match | |
1a9745d2 | 5351 | gfc_match_private (gfc_statement *st) |
4ee9c684 | 5352 | { |
5353 | ||
5354 | if (gfc_match ("private") != MATCH_YES) | |
5355 | return MATCH_NO; | |
5356 | ||
e14bee04 | 5357 | if (gfc_current_state () != COMP_MODULE |
5358 | && (gfc_current_state () != COMP_DERIVED | |
5359 | || !gfc_state_stack->previous | |
5360 | || gfc_state_stack->previous->state != COMP_MODULE)) | |
5361 | { | |
5362 | gfc_error ("PRIVATE statement at %C is only allowed in the " | |
5363 | "specification part of a module"); | |
5364 | return MATCH_ERROR; | |
5365 | } | |
5366 | ||
4ee9c684 | 5367 | if (gfc_current_state () == COMP_DERIVED) |
5368 | { | |
5369 | if (gfc_match_eos () == MATCH_YES) | |
5370 | { | |
5371 | *st = ST_PRIVATE; | |
5372 | return MATCH_YES; | |
5373 | } | |
5374 | ||
5375 | gfc_syntax_error (ST_PRIVATE); | |
5376 | return MATCH_ERROR; | |
5377 | } | |
5378 | ||
5379 | if (gfc_match_eos () == MATCH_YES) | |
5380 | { | |
5381 | *st = ST_PRIVATE; | |
5382 | return MATCH_YES; | |
5383 | } | |
5384 | ||
5385 | *st = ST_ATTR_DECL; | |
5386 | return access_attr_decl (ST_PRIVATE); | |
5387 | } | |
5388 | ||
5389 | ||
5390 | match | |
1a9745d2 | 5391 | gfc_match_public (gfc_statement *st) |
4ee9c684 | 5392 | { |
5393 | ||
5394 | if (gfc_match ("public") != MATCH_YES) | |
5395 | return MATCH_NO; | |
5396 | ||
e14bee04 | 5397 | if (gfc_current_state () != COMP_MODULE) |
5398 | { | |
5399 | gfc_error ("PUBLIC statement at %C is only allowed in the " | |
5400 | "specification part of a module"); | |
5401 | return MATCH_ERROR; | |
5402 | } | |
5403 | ||
4ee9c684 | 5404 | if (gfc_match_eos () == MATCH_YES) |
5405 | { | |
5406 | *st = ST_PUBLIC; | |
5407 | return MATCH_YES; | |
5408 | } | |
5409 | ||
5410 | *st = ST_ATTR_DECL; | |
5411 | return access_attr_decl (ST_PUBLIC); | |
5412 | } | |
5413 | ||
5414 | ||
5415 | /* Workhorse for gfc_match_parameter. */ | |
5416 | ||
5417 | static match | |
5418 | do_parm (void) | |
5419 | { | |
5420 | gfc_symbol *sym; | |
5421 | gfc_expr *init; | |
5422 | match m; | |
5423 | ||
5424 | m = gfc_match_symbol (&sym, 0); | |
5425 | if (m == MATCH_NO) | |
5426 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
5427 | ||
5428 | if (m != MATCH_YES) | |
5429 | return m; | |
5430 | ||
5431 | if (gfc_match_char ('=') == MATCH_NO) | |
5432 | { | |
5433 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
5434 | return MATCH_ERROR; | |
5435 | } | |
5436 | ||
5437 | m = gfc_match_init_expr (&init); | |
5438 | if (m == MATCH_NO) | |
5439 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
5440 | if (m != MATCH_YES) | |
5441 | return m; | |
5442 | ||
5443 | if (sym->ts.type == BT_UNKNOWN | |
5444 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
5445 | { | |
5446 | m = MATCH_ERROR; | |
5447 | goto cleanup; | |
5448 | } | |
5449 | ||
5450 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
950683ed | 5451 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
4ee9c684 | 5452 | { |
5453 | m = MATCH_ERROR; | |
5454 | goto cleanup; | |
5455 | } | |
5456 | ||
c1b6da4a | 5457 | if (sym->ts.type == BT_CHARACTER |
5458 | && sym->ts.cl != NULL | |
5459 | && sym->ts.cl->length != NULL | |
5460 | && sym->ts.cl->length->expr_type == EXPR_CONSTANT | |
5461 | && init->expr_type == EXPR_CONSTANT | |
5462 | && init->ts.type == BT_CHARACTER | |
5463 | && init->ts.kind == 1) | |
5464 | gfc_set_constant_character_len ( | |
1bfea7e8 | 5465 | mpz_get_si (sym->ts.cl->length->value.integer), init, false); |
c1b6da4a | 5466 | |
4ee9c684 | 5467 | sym->value = init; |
5468 | return MATCH_YES; | |
5469 | ||
5470 | cleanup: | |
5471 | gfc_free_expr (init); | |
5472 | return m; | |
5473 | } | |
5474 | ||
5475 | ||
5476 | /* Match a parameter statement, with the weird syntax that these have. */ | |
5477 | ||
5478 | match | |
5479 | gfc_match_parameter (void) | |
5480 | { | |
5481 | match m; | |
5482 | ||
5483 | if (gfc_match_char ('(') == MATCH_NO) | |
5484 | return MATCH_NO; | |
5485 | ||
5486 | for (;;) | |
5487 | { | |
5488 | m = do_parm (); | |
5489 | if (m != MATCH_YES) | |
5490 | break; | |
5491 | ||
5492 | if (gfc_match (" )%t") == MATCH_YES) | |
5493 | break; | |
5494 | ||
5495 | if (gfc_match_char (',') != MATCH_YES) | |
5496 | { | |
5497 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
5498 | m = MATCH_ERROR; | |
5499 | break; | |
5500 | } | |
5501 | } | |
5502 | ||
5503 | return m; | |
5504 | } | |
5505 | ||
5506 | ||
5507 | /* Save statements have a special syntax. */ | |
5508 | ||
5509 | match | |
5510 | gfc_match_save (void) | |
5511 | { | |
82f5ee13 | 5512 | char n[GFC_MAX_SYMBOL_LEN+1]; |
5513 | gfc_common_head *c; | |
4ee9c684 | 5514 | gfc_symbol *sym; |
5515 | match m; | |
5516 | ||
5517 | if (gfc_match_eos () == MATCH_YES) | |
5518 | { | |
5519 | if (gfc_current_ns->seen_save) | |
5520 | { | |
1a9745d2 | 5521 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
5522 | "follows previous SAVE statement") | |
76e82f95 | 5523 | == FAILURE) |
5524 | return MATCH_ERROR; | |
4ee9c684 | 5525 | } |
5526 | ||
5527 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
5528 | return MATCH_YES; | |
5529 | } | |
5530 | ||
5531 | if (gfc_current_ns->save_all) | |
5532 | { | |
1a9745d2 | 5533 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
5534 | "blanket SAVE statement") | |
76e82f95 | 5535 | == FAILURE) |
5536 | return MATCH_ERROR; | |
4ee9c684 | 5537 | } |
5538 | ||
5539 | gfc_match (" ::"); | |
5540 | ||
5541 | for (;;) | |
5542 | { | |
5543 | m = gfc_match_symbol (&sym, 0); | |
5544 | switch (m) | |
5545 | { | |
5546 | case MATCH_YES: | |
1a9745d2 | 5547 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
5548 | == FAILURE) | |
4ee9c684 | 5549 | return MATCH_ERROR; |
5550 | goto next_item; | |
5551 | ||
5552 | case MATCH_NO: | |
5553 | break; | |
5554 | ||
5555 | case MATCH_ERROR: | |
5556 | return MATCH_ERROR; | |
5557 | } | |
5558 | ||
82f5ee13 | 5559 | m = gfc_match (" / %n /", &n); |
4ee9c684 | 5560 | if (m == MATCH_ERROR) |
5561 | return MATCH_ERROR; | |
5562 | if (m == MATCH_NO) | |
5563 | goto syntax; | |
5564 | ||
403ddc45 | 5565 | c = gfc_get_common (n, 0); |
82f5ee13 | 5566 | c->saved = 1; |
5567 | ||
4ee9c684 | 5568 | gfc_current_ns->seen_save = 1; |
5569 | ||
5570 | next_item: | |
5571 | if (gfc_match_eos () == MATCH_YES) | |
5572 | break; | |
5573 | if (gfc_match_char (',') != MATCH_YES) | |
5574 | goto syntax; | |
5575 | } | |
5576 | ||
5577 | return MATCH_YES; | |
5578 | ||
5579 | syntax: | |
5580 | gfc_error ("Syntax error in SAVE statement at %C"); | |
5581 | return MATCH_ERROR; | |
5582 | } | |
5583 | ||
5584 | ||
8f6339b6 | 5585 | match |
5586 | gfc_match_value (void) | |
5587 | { | |
5588 | gfc_symbol *sym; | |
5589 | match m; | |
5590 | ||
1a9745d2 | 5591 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
8f6339b6 | 5592 | == FAILURE) |
5593 | return MATCH_ERROR; | |
5594 | ||
5595 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5596 | { | |
5597 | return MATCH_ERROR; | |
5598 | } | |
5599 | ||
5600 | if (gfc_match_eos () == MATCH_YES) | |
5601 | goto syntax; | |
5602 | ||
5603 | for(;;) | |
5604 | { | |
5605 | m = gfc_match_symbol (&sym, 0); | |
5606 | switch (m) | |
5607 | { | |
5608 | case MATCH_YES: | |
1a9745d2 | 5609 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
5610 | == FAILURE) | |
8f6339b6 | 5611 | return MATCH_ERROR; |
5612 | goto next_item; | |
5613 | ||
5614 | case MATCH_NO: | |
5615 | break; | |
5616 | ||
5617 | case MATCH_ERROR: | |
5618 | return MATCH_ERROR; | |
5619 | } | |
5620 | ||
5621 | next_item: | |
5622 | if (gfc_match_eos () == MATCH_YES) | |
5623 | break; | |
5624 | if (gfc_match_char (',') != MATCH_YES) | |
5625 | goto syntax; | |
5626 | } | |
5627 | ||
5628 | return MATCH_YES; | |
5629 | ||
5630 | syntax: | |
5631 | gfc_error ("Syntax error in VALUE statement at %C"); | |
5632 | return MATCH_ERROR; | |
5633 | } | |
5634 | ||
f6d0e37a | 5635 | |
ef814c81 | 5636 | match |
5637 | gfc_match_volatile (void) | |
5638 | { | |
5639 | gfc_symbol *sym; | |
5640 | match m; | |
5641 | ||
1a9745d2 | 5642 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
ef814c81 | 5643 | == FAILURE) |
5644 | return MATCH_ERROR; | |
5645 | ||
5646 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5647 | { | |
5648 | return MATCH_ERROR; | |
5649 | } | |
5650 | ||
5651 | if (gfc_match_eos () == MATCH_YES) | |
5652 | goto syntax; | |
5653 | ||
5654 | for(;;) | |
5655 | { | |
2f241857 | 5656 | /* VOLATILE is special because it can be added to host-associated |
5657 | symbols locally. */ | |
5658 | m = gfc_match_symbol (&sym, 1); | |
ef814c81 | 5659 | switch (m) |
5660 | { | |
5661 | case MATCH_YES: | |
1a9745d2 | 5662 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
5663 | == FAILURE) | |
ef814c81 | 5664 | return MATCH_ERROR; |
5665 | goto next_item; | |
5666 | ||
5667 | case MATCH_NO: | |
5668 | break; | |
5669 | ||
5670 | case MATCH_ERROR: | |
5671 | return MATCH_ERROR; | |
5672 | } | |
5673 | ||
5674 | next_item: | |
5675 | if (gfc_match_eos () == MATCH_YES) | |
5676 | break; | |
5677 | if (gfc_match_char (',') != MATCH_YES) | |
5678 | goto syntax; | |
5679 | } | |
5680 | ||
5681 | return MATCH_YES; | |
5682 | ||
5683 | syntax: | |
5684 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
5685 | return MATCH_ERROR; | |
5686 | } | |
5687 | ||
5688 | ||
4ee9c684 | 5689 | /* Match a module procedure statement. Note that we have to modify |
5690 | symbols in the parent's namespace because the current one was there | |
89d91d02 | 5691 | to receive symbols that are in an interface's formal argument list. */ |
4ee9c684 | 5692 | |
5693 | match | |
5694 | gfc_match_modproc (void) | |
5695 | { | |
5696 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5697 | gfc_symbol *sym; | |
5698 | match m; | |
63d42079 | 5699 | gfc_namespace *module_ns; |
4ee9c684 | 5700 | |
5701 | if (gfc_state_stack->state != COMP_INTERFACE | |
5702 | || gfc_state_stack->previous == NULL | |
5cf92482 | 5703 | || current_interface.type == INTERFACE_NAMELESS |
5704 | || current_interface.type == INTERFACE_ABSTRACT) | |
4ee9c684 | 5705 | { |
1a9745d2 | 5706 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
5707 | "interface"); | |
4ee9c684 | 5708 | return MATCH_ERROR; |
5709 | } | |
5710 | ||
63d42079 | 5711 | module_ns = gfc_current_ns->parent; |
5712 | for (; module_ns; module_ns = module_ns->parent) | |
5713 | if (module_ns->proc_name->attr.flavor == FL_MODULE) | |
5714 | break; | |
5715 | ||
5716 | if (module_ns == NULL) | |
5717 | return MATCH_ERROR; | |
5718 | ||
4ee9c684 | 5719 | for (;;) |
5720 | { | |
5721 | m = gfc_match_name (name); | |
5722 | if (m == MATCH_NO) | |
5723 | goto syntax; | |
5724 | if (m != MATCH_YES) | |
5725 | return MATCH_ERROR; | |
5726 | ||
63d42079 | 5727 | if (gfc_get_symbol (name, module_ns, &sym)) |
4ee9c684 | 5728 | return MATCH_ERROR; |
5729 | ||
5730 | if (sym->attr.proc != PROC_MODULE | |
950683ed | 5731 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
5732 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 5733 | return MATCH_ERROR; |
5734 | ||
5735 | if (gfc_add_interface (sym) == FAILURE) | |
5736 | return MATCH_ERROR; | |
5737 | ||
3186f695 | 5738 | sym->attr.mod_proc = 1; |
5739 | ||
4ee9c684 | 5740 | if (gfc_match_eos () == MATCH_YES) |
5741 | break; | |
5742 | if (gfc_match_char (',') != MATCH_YES) | |
5743 | goto syntax; | |
5744 | } | |
5745 | ||
5746 | return MATCH_YES; | |
5747 | ||
5748 | syntax: | |
5749 | gfc_syntax_error (ST_MODULE_PROC); | |
5750 | return MATCH_ERROR; | |
5751 | } | |
5752 | ||
5753 | ||
c5d33754 | 5754 | /* Match the optional attribute specifiers for a type declaration. |
5755 | Return MATCH_ERROR if an error is encountered in one of the handled | |
5756 | attributes (public, private, bind(c)), MATCH_NO if what's found is | |
5757 | not a handled attribute, and MATCH_YES otherwise. TODO: More error | |
5758 | checking on attribute conflicts needs to be done. */ | |
4ee9c684 | 5759 | |
5760 | match | |
c5d33754 | 5761 | gfc_get_type_attr_spec (symbol_attribute *attr) |
4ee9c684 | 5762 | { |
c5d33754 | 5763 | /* See if the derived type is marked as private. */ |
4ee9c684 | 5764 | if (gfc_match (" , private") == MATCH_YES) |
5765 | { | |
e14bee04 | 5766 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 5767 | { |
e14bee04 | 5768 | gfc_error ("Derived type at %C can only be PRIVATE in the " |
5769 | "specification part of a module"); | |
4ee9c684 | 5770 | return MATCH_ERROR; |
5771 | } | |
5772 | ||
c5d33754 | 5773 | if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
4ee9c684 | 5774 | return MATCH_ERROR; |
4ee9c684 | 5775 | } |
c5d33754 | 5776 | else if (gfc_match (" , public") == MATCH_YES) |
4ee9c684 | 5777 | { |
e14bee04 | 5778 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 5779 | { |
e14bee04 | 5780 | gfc_error ("Derived type at %C can only be PUBLIC in the " |
5781 | "specification part of a module"); | |
4ee9c684 | 5782 | return MATCH_ERROR; |
5783 | } | |
5784 | ||
c5d33754 | 5785 | if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
4ee9c684 | 5786 | return MATCH_ERROR; |
4ee9c684 | 5787 | } |
33e86520 | 5788 | else if (gfc_match(" , bind ( c )") == MATCH_YES) |
c5d33754 | 5789 | { |
5790 | /* If the type is defined to be bind(c) it then needs to make | |
5791 | sure that all fields are interoperable. This will | |
5792 | need to be a semantic check on the finished derived type. | |
5793 | See 15.2.3 (lines 9-12) of F2003 draft. */ | |
5794 | if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) | |
5795 | return MATCH_ERROR; | |
5796 | ||
5797 | /* TODO: attr conflicts need to be checked, probably in symbol.c. */ | |
5798 | } | |
5799 | else | |
5800 | return MATCH_NO; | |
5801 | ||
5802 | /* If we get here, something matched. */ | |
5803 | return MATCH_YES; | |
5804 | } | |
5805 | ||
5806 | ||
5807 | /* Match the beginning of a derived type declaration. If a type name | |
5808 | was the result of a function, then it is possible to have a symbol | |
5809 | already to be known as a derived type yet have no components. */ | |
5810 | ||
5811 | match | |
5812 | gfc_match_derived_decl (void) | |
5813 | { | |
5814 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5815 | symbol_attribute attr; | |
5816 | gfc_symbol *sym; | |
5817 | match m; | |
5818 | match is_type_attr_spec = MATCH_NO; | |
33e86520 | 5819 | bool seen_attr = false; |
c5d33754 | 5820 | |
5821 | if (gfc_current_state () == COMP_DERIVED) | |
5822 | return MATCH_NO; | |
5823 | ||
5824 | gfc_clear_attr (&attr); | |
5825 | ||
5826 | do | |
5827 | { | |
5828 | is_type_attr_spec = gfc_get_type_attr_spec (&attr); | |
5829 | if (is_type_attr_spec == MATCH_ERROR) | |
5830 | return MATCH_ERROR; | |
33e86520 | 5831 | if (is_type_attr_spec == MATCH_YES) |
5832 | seen_attr = true; | |
c5d33754 | 5833 | } while (is_type_attr_spec == MATCH_YES); |
4ee9c684 | 5834 | |
33e86520 | 5835 | if (gfc_match (" ::") != MATCH_YES && seen_attr) |
4ee9c684 | 5836 | { |
5837 | gfc_error ("Expected :: in TYPE definition at %C"); | |
5838 | return MATCH_ERROR; | |
5839 | } | |
5840 | ||
5841 | m = gfc_match (" %n%t", name); | |
5842 | if (m != MATCH_YES) | |
5843 | return m; | |
5844 | ||
a3055431 | 5845 | /* Make sure the name is not the name of an intrinsic type. */ |
5846 | if (gfc_is_intrinsic_typename (name)) | |
4ee9c684 | 5847 | { |
1a9745d2 | 5848 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
5849 | "type", name); | |
4ee9c684 | 5850 | return MATCH_ERROR; |
5851 | } | |
5852 | ||
5853 | if (gfc_get_symbol (name, NULL, &sym)) | |
5854 | return MATCH_ERROR; | |
5855 | ||
5856 | if (sym->ts.type != BT_UNKNOWN) | |
5857 | { | |
5858 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
5859 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
5860 | return MATCH_ERROR; | |
5861 | } | |
5862 | ||
5863 | /* The symbol may already have the derived attribute without the | |
5864 | components. The ways this can happen is via a function | |
5865 | definition, an INTRINSIC statement or a subtype in another | |
5866 | derived type that is a pointer. The first part of the AND clause | |
b14e2757 | 5867 | is true if a the symbol is not the return value of a function. */ |
4ee9c684 | 5868 | if (sym->attr.flavor != FL_DERIVED |
950683ed | 5869 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 5870 | return MATCH_ERROR; |
5871 | ||
5872 | if (sym->components != NULL) | |
5873 | { | |
1a9745d2 | 5874 | gfc_error ("Derived type definition of '%s' at %C has already been " |
5875 | "defined", sym->name); | |
4ee9c684 | 5876 | return MATCH_ERROR; |
5877 | } | |
5878 | ||
5879 | if (attr.access != ACCESS_UNKNOWN | |
950683ed | 5880 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
4ee9c684 | 5881 | return MATCH_ERROR; |
5882 | ||
c5d33754 | 5883 | /* See if the derived type was labeled as bind(c). */ |
5884 | if (attr.is_bind_c != 0) | |
5885 | sym->attr.is_bind_c = attr.is_bind_c; | |
5886 | ||
4ee9c684 | 5887 | gfc_new_block = sym; |
5888 | ||
5889 | return MATCH_YES; | |
5890 | } | |
b549d2a5 | 5891 | |
5892 | ||
5893 | /* Cray Pointees can be declared as: | |
5894 | pointer (ipt, a (n,m,...,*)) | |
5895 | By default, this is treated as an AS_ASSUMED_SIZE array. We'll | |
5896 | cheat and set a constant bound of 1 for the last dimension, if this | |
5897 | is the case. Since there is no bounds-checking for Cray Pointees, | |
5898 | this will be okay. */ | |
5899 | ||
5900 | try | |
5901 | gfc_mod_pointee_as (gfc_array_spec *as) | |
5902 | { | |
5903 | as->cray_pointee = true; /* This will be useful to know later. */ | |
5904 | if (as->type == AS_ASSUMED_SIZE) | |
5905 | { | |
5906 | as->type = AS_EXPLICIT; | |
5907 | as->upper[as->rank - 1] = gfc_int_expr (1); | |
5908 | as->cp_was_assumed = true; | |
5909 | } | |
5910 | else if (as->type == AS_ASSUMED_SHAPE) | |
5911 | { | |
5912 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
5913 | return MATCH_ERROR; | |
5914 | } | |
5915 | return MATCH_YES; | |
5916 | } | |
3b6a4b41 | 5917 | |
5918 | ||
5919 | /* Match the enum definition statement, here we are trying to match | |
5920 | the first line of enum definition statement. | |
5921 | Returns MATCH_YES if match is found. */ | |
5922 | ||
5923 | match | |
5924 | gfc_match_enum (void) | |
5925 | { | |
5926 | match m; | |
5927 | ||
5928 | m = gfc_match_eos (); | |
5929 | if (m != MATCH_YES) | |
5930 | return m; | |
5931 | ||
60fbbf9e | 5932 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") |
3b6a4b41 | 5933 | == FAILURE) |
5934 | return MATCH_ERROR; | |
5935 | ||
5936 | return MATCH_YES; | |
5937 | } | |
5938 | ||
5939 | ||
60fbbf9e | 5940 | /* Match a variable name with an optional initializer. When this |
5941 | subroutine is called, a variable is expected to be parsed next. | |
5942 | Depending on what is happening at the moment, updates either the | |
5943 | symbol table or the current interface. */ | |
5944 | ||
5945 | static match | |
5946 | enumerator_decl (void) | |
5947 | { | |
5948 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5949 | gfc_expr *initializer; | |
5950 | gfc_array_spec *as = NULL; | |
5951 | gfc_symbol *sym; | |
5952 | locus var_locus; | |
5953 | match m; | |
5954 | try t; | |
5955 | locus old_locus; | |
5956 | ||
5957 | initializer = NULL; | |
5958 | old_locus = gfc_current_locus; | |
5959 | ||
5960 | /* When we get here, we've just matched a list of attributes and | |
5961 | maybe a type and a double colon. The next thing we expect to see | |
5962 | is the name of the symbol. */ | |
5963 | m = gfc_match_name (name); | |
5964 | if (m != MATCH_YES) | |
5965 | goto cleanup; | |
5966 | ||
5967 | var_locus = gfc_current_locus; | |
5968 | ||
5969 | /* OK, we've successfully matched the declaration. Now put the | |
5970 | symbol in the current namespace. If we fail to create the symbol, | |
5971 | bail out. */ | |
5972 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
5973 | { | |
5974 | m = MATCH_ERROR; | |
5975 | goto cleanup; | |
5976 | } | |
5977 | ||
5978 | /* The double colon must be present in order to have initializers. | |
5979 | Otherwise the statement is ambiguous with an assignment statement. */ | |
5980 | if (colon_seen) | |
5981 | { | |
5982 | if (gfc_match_char ('=') == MATCH_YES) | |
5983 | { | |
5984 | m = gfc_match_init_expr (&initializer); | |
5985 | if (m == MATCH_NO) | |
5986 | { | |
5987 | gfc_error ("Expected an initialization expression at %C"); | |
5988 | m = MATCH_ERROR; | |
5989 | } | |
5990 | ||
5991 | if (m != MATCH_YES) | |
5992 | goto cleanup; | |
5993 | } | |
5994 | } | |
5995 | ||
5996 | /* If we do not have an initializer, the initialization value of the | |
5997 | previous enumerator (stored in last_initializer) is incremented | |
5998 | by 1 and is used to initialize the current enumerator. */ | |
5999 | if (initializer == NULL) | |
6000 | initializer = gfc_enum_initializer (last_initializer, old_locus); | |
e14bee04 | 6001 | |
60fbbf9e | 6002 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
6003 | { | |
6004 | gfc_error("ENUMERATOR %L not initialized with integer expression", | |
6005 | &var_locus); | |
e14bee04 | 6006 | m = MATCH_ERROR; |
60fbbf9e | 6007 | gfc_free_enum_history (); |
6008 | goto cleanup; | |
6009 | } | |
6010 | ||
6011 | /* Store this current initializer, for the next enumerator variable | |
6012 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
6013 | use last_initializer below. */ | |
6014 | last_initializer = initializer; | |
6015 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
6016 | ||
6017 | /* Maintain enumerator history. */ | |
6018 | gfc_find_symbol (name, NULL, 0, &sym); | |
6019 | create_enum_history (sym, last_initializer); | |
6020 | ||
6021 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
6022 | ||
6023 | cleanup: | |
6024 | /* Free stuff up and return. */ | |
6025 | gfc_free_expr (initializer); | |
6026 | ||
6027 | return m; | |
6028 | } | |
6029 | ||
6030 | ||
f6d0e37a | 6031 | /* Match the enumerator definition statement. */ |
3b6a4b41 | 6032 | |
6033 | match | |
6034 | gfc_match_enumerator_def (void) | |
6035 | { | |
6036 | match m; | |
60fbbf9e | 6037 | try t; |
e14bee04 | 6038 | |
3b6a4b41 | 6039 | gfc_clear_ts (¤t_ts); |
e14bee04 | 6040 | |
3b6a4b41 | 6041 | m = gfc_match (" enumerator"); |
6042 | if (m != MATCH_YES) | |
6043 | return m; | |
60fbbf9e | 6044 | |
6045 | m = gfc_match (" :: "); | |
6046 | if (m == MATCH_ERROR) | |
6047 | return m; | |
6048 | ||
6049 | colon_seen = (m == MATCH_YES); | |
e14bee04 | 6050 | |
3b6a4b41 | 6051 | if (gfc_current_state () != COMP_ENUM) |
6052 | { | |
6053 | gfc_error ("ENUM definition statement expected before %C"); | |
6054 | gfc_free_enum_history (); | |
6055 | return MATCH_ERROR; | |
6056 | } | |
6057 | ||
6058 | (¤t_ts)->type = BT_INTEGER; | |
6059 | (¤t_ts)->kind = gfc_c_int_kind; | |
e14bee04 | 6060 | |
60fbbf9e | 6061 | gfc_clear_attr (¤t_attr); |
6062 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
6063 | if (t == FAILURE) | |
3b6a4b41 | 6064 | { |
60fbbf9e | 6065 | m = MATCH_ERROR; |
3b6a4b41 | 6066 | goto cleanup; |
6067 | } | |
6068 | ||
3b6a4b41 | 6069 | for (;;) |
6070 | { | |
60fbbf9e | 6071 | m = enumerator_decl (); |
3b6a4b41 | 6072 | if (m == MATCH_ERROR) |
6073 | goto cleanup; | |
6074 | if (m == MATCH_NO) | |
6075 | break; | |
6076 | ||
6077 | if (gfc_match_eos () == MATCH_YES) | |
6078 | goto cleanup; | |
6079 | if (gfc_match_char (',') != MATCH_YES) | |
6080 | break; | |
6081 | } | |
6082 | ||
6083 | if (gfc_current_state () == COMP_ENUM) | |
6084 | { | |
6085 | gfc_free_enum_history (); | |
6086 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
6087 | m = MATCH_ERROR; | |
6088 | } | |
6089 | ||
6090 | cleanup: | |
6091 | gfc_free_array_spec (current_as); | |
6092 | current_as = NULL; | |
6093 | return m; | |
6094 | ||
6095 | } | |
6096 |