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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 | ||
67a51c8e | 81 | locus gfc_function_kind_locus; |
82 | locus gfc_function_type_locus; | |
83 | ||
4ee9c684 | 84 | |
b4f45d02 | 85 | /********************* DATA statement subroutines *********************/ |
86 | ||
1bfea7e8 | 87 | static bool in_match_data = false; |
88 | ||
89 | bool | |
90 | gfc_in_match_data (void) | |
91 | { | |
92 | return in_match_data; | |
93 | } | |
94 | ||
95 | void | |
96 | gfc_set_in_match_data (bool set_value) | |
97 | { | |
98 | in_match_data = set_value; | |
99 | } | |
100 | ||
b4f45d02 | 101 | /* Free a gfc_data_variable structure and everything beneath it. */ |
102 | ||
103 | static void | |
1a9745d2 | 104 | free_variable (gfc_data_variable *p) |
b4f45d02 | 105 | { |
106 | gfc_data_variable *q; | |
107 | ||
108 | for (; p; p = q) | |
109 | { | |
110 | q = p->next; | |
111 | gfc_free_expr (p->expr); | |
112 | gfc_free_iterator (&p->iter, 0); | |
113 | free_variable (p->list); | |
b4f45d02 | 114 | gfc_free (p); |
115 | } | |
116 | } | |
117 | ||
118 | ||
119 | /* Free a gfc_data_value structure and everything beneath it. */ | |
120 | ||
121 | static void | |
1a9745d2 | 122 | free_value (gfc_data_value *p) |
b4f45d02 | 123 | { |
124 | gfc_data_value *q; | |
125 | ||
126 | for (; p; p = q) | |
127 | { | |
128 | q = p->next; | |
129 | gfc_free_expr (p->expr); | |
130 | gfc_free (p); | |
131 | } | |
132 | } | |
133 | ||
134 | ||
135 | /* Free a list of gfc_data structures. */ | |
136 | ||
137 | void | |
1a9745d2 | 138 | gfc_free_data (gfc_data *p) |
b4f45d02 | 139 | { |
140 | gfc_data *q; | |
141 | ||
142 | for (; p; p = q) | |
143 | { | |
144 | q = p->next; | |
b4f45d02 | 145 | free_variable (p->var); |
146 | free_value (p->value); | |
b4f45d02 | 147 | gfc_free (p); |
148 | } | |
149 | } | |
150 | ||
151 | ||
af29c1f0 | 152 | /* Free all data in a namespace. */ |
1a9745d2 | 153 | |
af29c1f0 | 154 | static void |
f6d0e37a | 155 | gfc_free_data_all (gfc_namespace *ns) |
af29c1f0 | 156 | { |
157 | gfc_data *d; | |
158 | ||
159 | for (;ns->data;) | |
160 | { | |
161 | d = ns->data->next; | |
162 | gfc_free (ns->data); | |
163 | ns->data = d; | |
164 | } | |
165 | } | |
166 | ||
167 | ||
b4f45d02 | 168 | static match var_element (gfc_data_variable *); |
169 | ||
170 | /* Match a list of variables terminated by an iterator and a right | |
171 | parenthesis. */ | |
172 | ||
173 | static match | |
1a9745d2 | 174 | var_list (gfc_data_variable *parent) |
b4f45d02 | 175 | { |
176 | gfc_data_variable *tail, var; | |
177 | match m; | |
178 | ||
179 | m = var_element (&var); | |
180 | if (m == MATCH_ERROR) | |
181 | return MATCH_ERROR; | |
182 | if (m == MATCH_NO) | |
183 | goto syntax; | |
184 | ||
185 | tail = gfc_get_data_variable (); | |
186 | *tail = var; | |
187 | ||
188 | parent->list = tail; | |
189 | ||
190 | for (;;) | |
191 | { | |
192 | if (gfc_match_char (',') != MATCH_YES) | |
193 | goto syntax; | |
194 | ||
195 | m = gfc_match_iterator (&parent->iter, 1); | |
196 | if (m == MATCH_YES) | |
197 | break; | |
198 | if (m == MATCH_ERROR) | |
199 | return MATCH_ERROR; | |
200 | ||
201 | m = var_element (&var); | |
202 | if (m == MATCH_ERROR) | |
203 | return MATCH_ERROR; | |
204 | if (m == MATCH_NO) | |
205 | goto syntax; | |
206 | ||
207 | tail->next = gfc_get_data_variable (); | |
208 | tail = tail->next; | |
209 | ||
210 | *tail = var; | |
211 | } | |
212 | ||
213 | if (gfc_match_char (')') != MATCH_YES) | |
214 | goto syntax; | |
215 | return MATCH_YES; | |
216 | ||
217 | syntax: | |
218 | gfc_syntax_error (ST_DATA); | |
219 | return MATCH_ERROR; | |
220 | } | |
221 | ||
222 | ||
223 | /* Match a single element in a data variable list, which can be a | |
224 | variable-iterator list. */ | |
225 | ||
226 | static match | |
1a9745d2 | 227 | var_element (gfc_data_variable *new) |
b4f45d02 | 228 | { |
229 | match m; | |
230 | gfc_symbol *sym; | |
231 | ||
232 | memset (new, 0, sizeof (gfc_data_variable)); | |
233 | ||
234 | if (gfc_match_char ('(') == MATCH_YES) | |
235 | return var_list (new); | |
236 | ||
237 | m = gfc_match_variable (&new->expr, 0); | |
238 | if (m != MATCH_YES) | |
239 | return m; | |
240 | ||
241 | sym = new->expr->symtree->n.sym; | |
242 | ||
1a9745d2 | 243 | if (!sym->attr.function && gfc_current_ns->parent |
244 | && gfc_current_ns->parent == sym->ns) | |
b4f45d02 | 245 | { |
c8df3e9c | 246 | gfc_error ("Host associated variable '%s' may not be in the DATA " |
7698a624 | 247 | "statement at %C", sym->name); |
b4f45d02 | 248 | return MATCH_ERROR; |
249 | } | |
250 | ||
c8df3e9c | 251 | if (gfc_current_state () != COMP_BLOCK_DATA |
1a9745d2 | 252 | && sym->attr.in_common |
253 | && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of " | |
254 | "common block variable '%s' in DATA statement at %C", | |
255 | sym->name) == FAILURE) | |
c8df3e9c | 256 | return MATCH_ERROR; |
b4f45d02 | 257 | |
950683ed | 258 | if (gfc_add_data (&sym->attr, sym->name, &new->expr->where) == FAILURE) |
b4f45d02 | 259 | return MATCH_ERROR; |
260 | ||
261 | return MATCH_YES; | |
262 | } | |
263 | ||
264 | ||
265 | /* Match the top-level list of data variables. */ | |
266 | ||
267 | static match | |
1a9745d2 | 268 | top_var_list (gfc_data *d) |
b4f45d02 | 269 | { |
270 | gfc_data_variable var, *tail, *new; | |
271 | match m; | |
272 | ||
273 | tail = NULL; | |
274 | ||
275 | for (;;) | |
276 | { | |
277 | m = var_element (&var); | |
278 | if (m == MATCH_NO) | |
279 | goto syntax; | |
280 | if (m == MATCH_ERROR) | |
281 | return MATCH_ERROR; | |
282 | ||
283 | new = gfc_get_data_variable (); | |
284 | *new = var; | |
285 | ||
286 | if (tail == NULL) | |
287 | d->var = new; | |
288 | else | |
289 | tail->next = new; | |
290 | ||
291 | tail = new; | |
292 | ||
293 | if (gfc_match_char ('/') == MATCH_YES) | |
294 | break; | |
295 | if (gfc_match_char (',') != MATCH_YES) | |
296 | goto syntax; | |
297 | } | |
298 | ||
299 | return MATCH_YES; | |
300 | ||
301 | syntax: | |
302 | gfc_syntax_error (ST_DATA); | |
af29c1f0 | 303 | gfc_free_data_all (gfc_current_ns); |
b4f45d02 | 304 | return MATCH_ERROR; |
305 | } | |
306 | ||
307 | ||
308 | static match | |
1a9745d2 | 309 | match_data_constant (gfc_expr **result) |
b4f45d02 | 310 | { |
311 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
312 | gfc_symbol *sym; | |
313 | gfc_expr *expr; | |
314 | match m; | |
096d4ad9 | 315 | locus old_loc; |
b4f45d02 | 316 | |
317 | m = gfc_match_literal_constant (&expr, 1); | |
318 | if (m == MATCH_YES) | |
319 | { | |
320 | *result = expr; | |
321 | return MATCH_YES; | |
322 | } | |
323 | ||
324 | if (m == MATCH_ERROR) | |
325 | return MATCH_ERROR; | |
326 | ||
327 | m = gfc_match_null (result); | |
328 | if (m != MATCH_NO) | |
329 | return m; | |
330 | ||
096d4ad9 | 331 | old_loc = gfc_current_locus; |
332 | ||
333 | /* Should this be a structure component, try to match it | |
334 | before matching a name. */ | |
335 | m = gfc_match_rvalue (result); | |
336 | if (m == MATCH_ERROR) | |
337 | return m; | |
338 | ||
339 | if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE) | |
340 | { | |
341 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
342 | m = MATCH_ERROR; | |
343 | return m; | |
344 | } | |
345 | ||
346 | gfc_current_locus = old_loc; | |
347 | ||
b4f45d02 | 348 | m = gfc_match_name (name); |
349 | if (m != MATCH_YES) | |
350 | return m; | |
351 | ||
352 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
353 | return MATCH_ERROR; | |
354 | ||
355 | if (sym == NULL | |
356 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
357 | { | |
358 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
359 | name); | |
360 | return MATCH_ERROR; | |
361 | } | |
362 | else if (sym->attr.flavor == FL_DERIVED) | |
363 | return gfc_match_structure_constructor (sym, result); | |
364 | ||
365 | *result = gfc_copy_expr (sym->value); | |
366 | return MATCH_YES; | |
367 | } | |
368 | ||
369 | ||
370 | /* Match a list of values in a DATA statement. The leading '/' has | |
371 | already been seen at this point. */ | |
372 | ||
373 | static match | |
1a9745d2 | 374 | top_val_list (gfc_data *data) |
b4f45d02 | 375 | { |
376 | gfc_data_value *new, *tail; | |
377 | gfc_expr *expr; | |
378 | const char *msg; | |
379 | match m; | |
380 | ||
381 | tail = NULL; | |
382 | ||
383 | for (;;) | |
384 | { | |
385 | m = match_data_constant (&expr); | |
386 | if (m == MATCH_NO) | |
387 | goto syntax; | |
388 | if (m == MATCH_ERROR) | |
389 | return MATCH_ERROR; | |
390 | ||
391 | new = gfc_get_data_value (); | |
392 | ||
393 | if (tail == NULL) | |
394 | data->value = new; | |
395 | else | |
396 | tail->next = new; | |
397 | ||
398 | tail = new; | |
399 | ||
400 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
401 | { | |
402 | tail->expr = expr; | |
403 | tail->repeat = 1; | |
404 | } | |
405 | else | |
406 | { | |
407 | signed int tmp; | |
408 | msg = gfc_extract_int (expr, &tmp); | |
409 | gfc_free_expr (expr); | |
410 | if (msg != NULL) | |
411 | { | |
412 | gfc_error (msg); | |
413 | return MATCH_ERROR; | |
414 | } | |
415 | tail->repeat = tmp; | |
416 | ||
417 | m = match_data_constant (&tail->expr); | |
418 | if (m == MATCH_NO) | |
419 | goto syntax; | |
420 | if (m == MATCH_ERROR) | |
421 | return MATCH_ERROR; | |
422 | } | |
423 | ||
424 | if (gfc_match_char ('/') == MATCH_YES) | |
425 | break; | |
426 | if (gfc_match_char (',') == MATCH_NO) | |
427 | goto syntax; | |
428 | } | |
429 | ||
430 | return MATCH_YES; | |
431 | ||
432 | syntax: | |
433 | gfc_syntax_error (ST_DATA); | |
af29c1f0 | 434 | gfc_free_data_all (gfc_current_ns); |
b4f45d02 | 435 | return MATCH_ERROR; |
436 | } | |
437 | ||
438 | ||
439 | /* Matches an old style initialization. */ | |
440 | ||
441 | static match | |
442 | match_old_style_init (const char *name) | |
443 | { | |
444 | match m; | |
445 | gfc_symtree *st; | |
344b937e | 446 | gfc_symbol *sym; |
b4f45d02 | 447 | gfc_data *newdata; |
448 | ||
449 | /* Set up data structure to hold initializers. */ | |
450 | gfc_find_sym_tree (name, NULL, 0, &st); | |
344b937e | 451 | sym = st->n.sym; |
452 | ||
b4f45d02 | 453 | newdata = gfc_get_data (); |
454 | newdata->var = gfc_get_data_variable (); | |
455 | newdata->var->expr = gfc_get_variable_expr (st); | |
5aed5db3 | 456 | newdata->where = gfc_current_locus; |
b4f45d02 | 457 | |
f6d0e37a | 458 | /* Match initial value list. This also eats the terminal '/'. */ |
b4f45d02 | 459 | m = top_val_list (newdata); |
460 | if (m != MATCH_YES) | |
461 | { | |
462 | gfc_free (newdata); | |
463 | return m; | |
464 | } | |
465 | ||
466 | if (gfc_pure (NULL)) | |
467 | { | |
468 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
469 | gfc_free (newdata); | |
470 | return MATCH_ERROR; | |
471 | } | |
472 | ||
344b937e | 473 | /* Mark the variable as having appeared in a data statement. */ |
474 | if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) | |
475 | { | |
476 | gfc_free (newdata); | |
477 | return MATCH_ERROR; | |
478 | } | |
479 | ||
b4f45d02 | 480 | /* Chain in namespace list of DATA initializers. */ |
481 | newdata->next = gfc_current_ns->data; | |
482 | gfc_current_ns->data = newdata; | |
483 | ||
484 | return m; | |
485 | } | |
486 | ||
1a9745d2 | 487 | |
b4f45d02 | 488 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
39fca56b | 489 | we are matching a DATA statement and are therefore issuing an error |
e14bee04 | 490 | if we encounter something unexpected, if not, we're trying to match |
fe06c0d5 | 491 | an old-style initialization expression of the form INTEGER I /2/. */ |
b4f45d02 | 492 | |
493 | match | |
494 | gfc_match_data (void) | |
495 | { | |
496 | gfc_data *new; | |
497 | match m; | |
498 | ||
1bfea7e8 | 499 | gfc_set_in_match_data (true); |
500 | ||
b4f45d02 | 501 | for (;;) |
502 | { | |
503 | new = gfc_get_data (); | |
504 | new->where = gfc_current_locus; | |
505 | ||
506 | m = top_var_list (new); | |
507 | if (m != MATCH_YES) | |
508 | goto cleanup; | |
509 | ||
510 | m = top_val_list (new); | |
511 | if (m != MATCH_YES) | |
512 | goto cleanup; | |
513 | ||
514 | new->next = gfc_current_ns->data; | |
515 | gfc_current_ns->data = new; | |
516 | ||
517 | if (gfc_match_eos () == MATCH_YES) | |
518 | break; | |
519 | ||
520 | gfc_match_char (','); /* Optional comma */ | |
521 | } | |
522 | ||
1bfea7e8 | 523 | gfc_set_in_match_data (false); |
524 | ||
b4f45d02 | 525 | if (gfc_pure (NULL)) |
526 | { | |
527 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
528 | return MATCH_ERROR; | |
529 | } | |
530 | ||
531 | return MATCH_YES; | |
532 | ||
533 | cleanup: | |
1bfea7e8 | 534 | gfc_set_in_match_data (false); |
b4f45d02 | 535 | gfc_free_data (new); |
536 | return MATCH_ERROR; | |
537 | } | |
538 | ||
539 | ||
540 | /************************ Declaration statements *********************/ | |
541 | ||
4ee9c684 | 542 | /* Match an intent specification. Since this can only happen after an |
543 | INTENT word, a legal intent-spec must follow. */ | |
544 | ||
545 | static sym_intent | |
546 | match_intent_spec (void) | |
547 | { | |
548 | ||
549 | if (gfc_match (" ( in out )") == MATCH_YES) | |
550 | return INTENT_INOUT; | |
551 | if (gfc_match (" ( in )") == MATCH_YES) | |
552 | return INTENT_IN; | |
553 | if (gfc_match (" ( out )") == MATCH_YES) | |
554 | return INTENT_OUT; | |
555 | ||
556 | gfc_error ("Bad INTENT specification at %C"); | |
557 | return INTENT_UNKNOWN; | |
558 | } | |
559 | ||
560 | ||
561 | /* Matches a character length specification, which is either a | |
562 | specification expression or a '*'. */ | |
563 | ||
564 | static match | |
1a9745d2 | 565 | char_len_param_value (gfc_expr **expr) |
4ee9c684 | 566 | { |
4ee9c684 | 567 | if (gfc_match_char ('*') == MATCH_YES) |
568 | { | |
569 | *expr = NULL; | |
570 | return MATCH_YES; | |
571 | } | |
572 | ||
573 | return gfc_match_expr (expr); | |
574 | } | |
575 | ||
576 | ||
577 | /* A character length is a '*' followed by a literal integer or a | |
578 | char_len_param_value in parenthesis. */ | |
579 | ||
580 | static match | |
1a9745d2 | 581 | match_char_length (gfc_expr **expr) |
4ee9c684 | 582 | { |
3bd3b616 | 583 | int length; |
4ee9c684 | 584 | match m; |
585 | ||
586 | m = gfc_match_char ('*'); | |
587 | if (m != MATCH_YES) | |
588 | return m; | |
589 | ||
3bd3b616 | 590 | m = gfc_match_small_literal_int (&length, NULL); |
4ee9c684 | 591 | if (m == MATCH_ERROR) |
592 | return m; | |
593 | ||
594 | if (m == MATCH_YES) | |
595 | { | |
596 | *expr = gfc_int_expr (length); | |
597 | return m; | |
598 | } | |
599 | ||
600 | if (gfc_match_char ('(') == MATCH_NO) | |
601 | goto syntax; | |
602 | ||
603 | m = char_len_param_value (expr); | |
604 | if (m == MATCH_ERROR) | |
605 | return m; | |
606 | if (m == MATCH_NO) | |
607 | goto syntax; | |
608 | ||
609 | if (gfc_match_char (')') == MATCH_NO) | |
610 | { | |
611 | gfc_free_expr (*expr); | |
612 | *expr = NULL; | |
613 | goto syntax; | |
614 | } | |
615 | ||
616 | return MATCH_YES; | |
617 | ||
618 | syntax: | |
619 | gfc_error ("Syntax error in character length specification at %C"); | |
620 | return MATCH_ERROR; | |
621 | } | |
622 | ||
623 | ||
ee893be6 | 624 | /* Special subroutine for finding a symbol. Check if the name is found |
625 | in the current name space. If not, and we're compiling a function or | |
626 | subroutine and the parent compilation unit is an interface, then check | |
627 | to see if the name we've been given is the name of the interface | |
628 | (located in another namespace). */ | |
4ee9c684 | 629 | |
630 | static int | |
1a9745d2 | 631 | find_special (const char *name, gfc_symbol **result) |
4ee9c684 | 632 | { |
633 | gfc_state_data *s; | |
ee893be6 | 634 | int i; |
4ee9c684 | 635 | |
ee893be6 | 636 | i = gfc_get_symbol (name, NULL, result); |
e14bee04 | 637 | if (i == 0) |
ee893be6 | 638 | goto end; |
e14bee04 | 639 | |
4ee9c684 | 640 | if (gfc_current_state () != COMP_SUBROUTINE |
641 | && gfc_current_state () != COMP_FUNCTION) | |
ee893be6 | 642 | goto end; |
4ee9c684 | 643 | |
644 | s = gfc_state_stack->previous; | |
645 | if (s == NULL) | |
ee893be6 | 646 | goto end; |
4ee9c684 | 647 | |
648 | if (s->state != COMP_INTERFACE) | |
ee893be6 | 649 | goto end; |
4ee9c684 | 650 | if (s->sym == NULL) |
f6d0e37a | 651 | goto end; /* Nameless interface. */ |
4ee9c684 | 652 | |
653 | if (strcmp (name, s->sym->name) == 0) | |
654 | { | |
655 | *result = s->sym; | |
656 | return 0; | |
657 | } | |
658 | ||
ee893be6 | 659 | end: |
660 | return i; | |
4ee9c684 | 661 | } |
662 | ||
663 | ||
664 | /* Special subroutine for getting a symbol node associated with a | |
665 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
666 | symbol is created in the parent using with symtree node in the | |
667 | child unit pointing to the symbol. If the current namespace has no | |
668 | parent, then the symbol is just created in the current unit. */ | |
669 | ||
670 | static int | |
1a9745d2 | 671 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
4ee9c684 | 672 | { |
673 | gfc_symtree *st; | |
674 | gfc_symbol *sym; | |
675 | int rc; | |
676 | ||
d77f260f | 677 | /* Module functions have to be left in their own namespace because |
678 | they have potentially (almost certainly!) already been referenced. | |
679 | In this sense, they are rather like external functions. This is | |
680 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
681 | space is set to point to the master function, so that the fake | |
682 | result mechanism can work. */ | |
683 | if (module_fcn_entry) | |
861d824f | 684 | { |
685 | /* Present if entry is declared to be a module procedure. */ | |
686 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); | |
c6a05992 | 687 | |
861d824f | 688 | if (*result == NULL) |
689 | rc = gfc_get_symbol (name, NULL, result); | |
c6a05992 | 690 | else if (gfc_get_symbol (name, NULL, &sym) == 0 |
691 | && sym | |
692 | && sym->ts.type != BT_UNKNOWN | |
693 | && (*result)->ts.type == BT_UNKNOWN | |
694 | && sym->attr.flavor == FL_UNKNOWN) | |
695 | /* Pick up the typespec for the entry, if declared in the function | |
696 | body. Note that this symbol is FL_UNKNOWN because it will | |
697 | only have appeared in a type declaration. The local symtree | |
698 | is set to point to the module symbol and a unique symtree | |
699 | to the local version. This latter ensures a correct clearing | |
700 | of the symbols. */ | |
701 | { | |
702 | (*result)->ts = sym->ts; | |
703 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); | |
704 | st->n.sym = *result; | |
705 | st = gfc_get_unique_symtree (gfc_current_ns); | |
706 | st->n.sym = sym; | |
707 | } | |
861d824f | 708 | } |
858f9894 | 709 | else |
710 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
4ee9c684 | 711 | |
858f9894 | 712 | sym = *result; |
c717e399 | 713 | gfc_current_ns->refs++; |
4ee9c684 | 714 | |
858f9894 | 715 | if (sym && !sym->new && gfc_current_state () != COMP_INTERFACE) |
716 | { | |
16f49153 | 717 | /* Trap another encompassed procedure with the same name. All |
718 | these conditions are necessary to avoid picking up an entry | |
719 | whose name clashes with that of the encompassing procedure; | |
720 | this is handled using gsymbols to register unique,globally | |
721 | accessible names. */ | |
858f9894 | 722 | if (sym->attr.flavor != 0 |
1a9745d2 | 723 | && sym->attr.proc != 0 |
724 | && (sym->attr.subroutine || sym->attr.function) | |
725 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
858f9894 | 726 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
727 | name, &sym->declared_at); | |
728 | ||
5720fd2f | 729 | /* Trap a procedure with a name the same as interface in the |
730 | encompassing scope. */ | |
731 | if (sym->attr.generic != 0 | |
db697236 | 732 | && (sym->attr.subroutine || sym->attr.function) |
733 | && !sym->attr.mod_proc) | |
5720fd2f | 734 | gfc_error_now ("Name '%s' at %C is already defined" |
735 | " as a generic interface at %L", | |
736 | name, &sym->declared_at); | |
737 | ||
858f9894 | 738 | /* Trap declarations of attributes in encompassing scope. The |
739 | signature for this is that ts.kind is set. Legitimate | |
740 | references only set ts.type. */ | |
741 | if (sym->ts.kind != 0 | |
1a9745d2 | 742 | && !sym->attr.implicit_type |
743 | && sym->attr.proc == 0 | |
744 | && gfc_current_ns->parent != NULL | |
745 | && sym->attr.access == 0 | |
746 | && !module_fcn_entry) | |
747 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
748 | "and must not have attributes declared at %L", | |
858f9894 | 749 | name, &sym->declared_at); |
750 | } | |
751 | ||
752 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
753 | return rc; | |
4ee9c684 | 754 | |
d77f260f | 755 | /* Module function entries will already have a symtree in |
756 | the current namespace but will need one at module level. */ | |
757 | if (module_fcn_entry) | |
861d824f | 758 | { |
759 | /* Present if entry is declared to be a module procedure. */ | |
760 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); | |
761 | if (st == NULL) | |
762 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
763 | } | |
d77f260f | 764 | else |
765 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
4ee9c684 | 766 | |
4ee9c684 | 767 | st->n.sym = sym; |
768 | sym->refs++; | |
769 | ||
f6d0e37a | 770 | /* See if the procedure should be a module procedure. */ |
4ee9c684 | 771 | |
d77f260f | 772 | if (((sym->ns->proc_name != NULL |
861d824f | 773 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
774 | && sym->attr.proc != PROC_MODULE) | |
775 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) | |
776 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
777 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 778 | rc = 2; |
779 | ||
780 | return rc; | |
781 | } | |
782 | ||
783 | ||
c5d33754 | 784 | /* Verify that the given symbol representing a parameter is C |
785 | interoperable, by checking to see if it was marked as such after | |
786 | its declaration. If the given symbol is not interoperable, a | |
787 | warning is reported, thus removing the need to return the status to | |
788 | the calling function. The standard does not require the user use | |
789 | one of the iso_c_binding named constants to declare an | |
790 | interoperable parameter, but we can't be sure if the param is C | |
791 | interop or not if the user doesn't. For example, integer(4) may be | |
792 | legal Fortran, but doesn't have meaning in C. It may interop with | |
793 | a number of the C types, which causes a problem because the | |
794 | compiler can't know which one. This code is almost certainly not | |
795 | portable, and the user will get what they deserve if the C type | |
796 | across platforms isn't always interoperable with integer(4). If | |
797 | the user had used something like integer(c_int) or integer(c_long), | |
798 | the compiler could have automatically handled the varying sizes | |
799 | across platforms. */ | |
800 | ||
801 | try | |
802 | verify_c_interop_param (gfc_symbol *sym) | |
803 | { | |
804 | int is_c_interop = 0; | |
805 | try retval = SUCCESS; | |
806 | ||
807 | /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). | |
808 | Don't repeat the checks here. */ | |
809 | if (sym->attr.implicit_type) | |
810 | return SUCCESS; | |
811 | ||
812 | /* For subroutines or functions that are passed to a BIND(C) procedure, | |
813 | they're interoperable if they're BIND(C) and their params are all | |
814 | interoperable. */ | |
815 | if (sym->attr.flavor == FL_PROCEDURE) | |
816 | { | |
817 | if (sym->attr.is_bind_c == 0) | |
818 | { | |
819 | gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " | |
820 | "attribute to be C interoperable", sym->name, | |
821 | &(sym->declared_at)); | |
822 | ||
823 | return FAILURE; | |
824 | } | |
825 | else | |
826 | { | |
827 | if (sym->attr.is_c_interop == 1) | |
828 | /* We've already checked this procedure; don't check it again. */ | |
829 | return SUCCESS; | |
830 | else | |
831 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, | |
832 | sym->common_block); | |
833 | } | |
834 | } | |
835 | ||
836 | /* See if we've stored a reference to a procedure that owns sym. */ | |
837 | if (sym->ns != NULL && sym->ns->proc_name != NULL) | |
838 | { | |
839 | if (sym->ns->proc_name->attr.is_bind_c == 1) | |
840 | { | |
841 | is_c_interop = | |
842 | (verify_c_interop (&(sym->ts), sym->name, &(sym->declared_at)) | |
843 | == SUCCESS ? 1 : 0); | |
844 | ||
845 | if (is_c_interop != 1) | |
846 | { | |
847 | /* Make personalized messages to give better feedback. */ | |
848 | if (sym->ts.type == BT_DERIVED) | |
849 | gfc_error ("Type '%s' at %L is a parameter to the BIND(C) " | |
850 | " procedure '%s' but is not C interoperable " | |
851 | "because derived type '%s' is not C interoperable", | |
852 | sym->name, &(sym->declared_at), | |
853 | sym->ns->proc_name->name, | |
854 | sym->ts.derived->name); | |
855 | else | |
856 | gfc_warning ("Variable '%s' at %L is a parameter to the " | |
857 | "BIND(C) procedure '%s' but may not be C " | |
858 | "interoperable", | |
859 | sym->name, &(sym->declared_at), | |
860 | sym->ns->proc_name->name); | |
861 | } | |
e4eda3ec | 862 | |
863 | /* Character strings are only C interoperable if they have a | |
864 | length of 1. */ | |
865 | if (sym->ts.type == BT_CHARACTER) | |
866 | { | |
867 | gfc_charlen *cl = sym->ts.cl; | |
868 | if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT | |
869 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) | |
870 | { | |
871 | gfc_error ("Character argument '%s' at %L " | |
872 | "must be length 1 because " | |
873 | "procedure '%s' is BIND(C)", | |
874 | sym->name, &sym->declared_at, | |
875 | sym->ns->proc_name->name); | |
876 | retval = FAILURE; | |
877 | } | |
878 | } | |
879 | ||
c5d33754 | 880 | /* We have to make sure that any param to a bind(c) routine does |
881 | not have the allocatable, pointer, or optional attributes, | |
882 | according to J3/04-007, section 5.1. */ | |
883 | if (sym->attr.allocatable == 1) | |
884 | { | |
885 | gfc_error ("Variable '%s' at %L cannot have the " | |
886 | "ALLOCATABLE attribute because procedure '%s'" | |
887 | " is BIND(C)", sym->name, &(sym->declared_at), | |
888 | sym->ns->proc_name->name); | |
889 | retval = FAILURE; | |
890 | } | |
891 | ||
892 | if (sym->attr.pointer == 1) | |
893 | { | |
894 | gfc_error ("Variable '%s' at %L cannot have the " | |
895 | "POINTER attribute because procedure '%s'" | |
896 | " is BIND(C)", sym->name, &(sym->declared_at), | |
897 | sym->ns->proc_name->name); | |
898 | retval = FAILURE; | |
899 | } | |
900 | ||
901 | if (sym->attr.optional == 1) | |
902 | { | |
903 | gfc_error ("Variable '%s' at %L cannot have the " | |
904 | "OPTIONAL attribute because procedure '%s'" | |
905 | " is BIND(C)", sym->name, &(sym->declared_at), | |
906 | sym->ns->proc_name->name); | |
907 | retval = FAILURE; | |
908 | } | |
909 | ||
910 | /* Make sure that if it has the dimension attribute, that it is | |
911 | either assumed size or explicit shape. */ | |
912 | if (sym->as != NULL) | |
913 | { | |
914 | if (sym->as->type == AS_ASSUMED_SHAPE) | |
915 | { | |
916 | gfc_error ("Assumed-shape array '%s' at %L cannot be an " | |
917 | "argument to the procedure '%s' at %L because " | |
918 | "the procedure is BIND(C)", sym->name, | |
919 | &(sym->declared_at), sym->ns->proc_name->name, | |
920 | &(sym->ns->proc_name->declared_at)); | |
921 | retval = FAILURE; | |
922 | } | |
923 | ||
924 | if (sym->as->type == AS_DEFERRED) | |
925 | { | |
926 | gfc_error ("Deferred-shape array '%s' at %L cannot be an " | |
927 | "argument to the procedure '%s' at %L because " | |
928 | "the procedure is BIND(C)", sym->name, | |
929 | &(sym->declared_at), sym->ns->proc_name->name, | |
930 | &(sym->ns->proc_name->declared_at)); | |
931 | retval = FAILURE; | |
932 | } | |
933 | } | |
934 | } | |
935 | } | |
936 | ||
937 | return retval; | |
938 | } | |
939 | ||
940 | ||
941 | /* Function called by variable_decl() that adds a name to the symbol table. */ | |
4ee9c684 | 942 | |
943 | static try | |
1a9745d2 | 944 | build_sym (const char *name, gfc_charlen *cl, |
945 | gfc_array_spec **as, locus *var_locus) | |
4ee9c684 | 946 | { |
947 | symbol_attribute attr; | |
948 | gfc_symbol *sym; | |
949 | ||
ee893be6 | 950 | if (gfc_get_symbol (name, NULL, &sym)) |
4ee9c684 | 951 | return FAILURE; |
952 | ||
f6d0e37a | 953 | /* Start updating the symbol table. Add basic type attribute if present. */ |
4ee9c684 | 954 | if (current_ts.type != BT_UNKNOWN |
1a9745d2 | 955 | && (sym->attr.implicit_type == 0 |
956 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
4ee9c684 | 957 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
958 | return FAILURE; | |
959 | ||
960 | if (sym->ts.type == BT_CHARACTER) | |
961 | sym->ts.cl = cl; | |
962 | ||
963 | /* Add dimension attribute if present. */ | |
964 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
965 | return FAILURE; | |
966 | *as = NULL; | |
967 | ||
968 | /* Add attribute to symbol. The copy is so that we can reset the | |
969 | dimension attribute. */ | |
970 | attr = current_attr; | |
971 | attr.dimension = 0; | |
972 | ||
973 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
974 | return FAILURE; | |
975 | ||
c5d33754 | 976 | /* Finish any work that may need to be done for the binding label, |
977 | if it's a bind(c). The bind(c) attr is found before the symbol | |
978 | is made, and before the symbol name (for data decls), so the | |
979 | current_ts is holding the binding label, or nothing if the | |
980 | name= attr wasn't given. Therefore, test here if we're dealing | |
981 | with a bind(c) and make sure the binding label is set correctly. */ | |
982 | if (sym->attr.is_bind_c == 1) | |
983 | { | |
984 | if (sym->binding_label[0] == '\0') | |
985 | { | |
825718f9 | 986 | /* Set the binding label and verify that if a NAME= was specified |
987 | then only one identifier was in the entity-decl-list. */ | |
988 | if (set_binding_label (sym->binding_label, sym->name, | |
989 | num_idents_on_line) == FAILURE) | |
c5d33754 | 990 | return FAILURE; |
991 | } | |
992 | } | |
993 | ||
994 | /* See if we know we're in a common block, and if it's a bind(c) | |
995 | common then we need to make sure we're an interoperable type. */ | |
996 | if (sym->attr.in_common == 1) | |
997 | { | |
998 | /* Test the common block object. */ | |
999 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 | |
1000 | && sym->ts.is_c_interop != 1) | |
1001 | { | |
1002 | gfc_error_now ("Variable '%s' in common block '%s' at %C " | |
1003 | "must be declared with a C interoperable " | |
1004 | "kind since common block '%s' is BIND(C)", | |
1005 | sym->name, sym->common_block->name, | |
1006 | sym->common_block->name); | |
1007 | gfc_clear_error (); | |
1008 | } | |
1009 | } | |
1010 | ||
2457a77e | 1011 | sym->attr.implied_index = 0; |
1012 | ||
4ee9c684 | 1013 | return SUCCESS; |
1014 | } | |
1015 | ||
1a9745d2 | 1016 | |
a270dc8e | 1017 | /* Set character constant to the given length. The constant will be padded or |
1018 | truncated. */ | |
1019 | ||
1020 | void | |
1a9745d2 | 1021 | gfc_set_constant_character_len (int len, gfc_expr *expr, bool array) |
a270dc8e | 1022 | { |
1a9745d2 | 1023 | char *s; |
a270dc8e | 1024 | int slen; |
1025 | ||
1026 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
1027 | gcc_assert (expr->ts.type == BT_CHARACTER && expr->ts.kind == 1); | |
1028 | ||
1029 | slen = expr->value.character.length; | |
1030 | if (len != slen) | |
1031 | { | |
89f528df | 1032 | s = gfc_getmem (len + 1); |
a270dc8e | 1033 | memcpy (s, expr->value.character.string, MIN (len, slen)); |
1034 | if (len > slen) | |
1035 | memset (&s[slen], ' ', len - slen); | |
1bfea7e8 | 1036 | |
1037 | if (gfc_option.warn_character_truncation && slen > len) | |
1038 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
1039 | "(%d/%d)", &expr->where, slen, len); | |
1040 | ||
1041 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
1042 | initializers. */ | |
1043 | if (array && slen < len && !(gfc_option.allow_std & GFC_STD_GNU)) | |
1044 | gfc_error_now ("The CHARACTER elements of the array constructor " | |
1045 | "at %L must have the same length (%d/%d)", | |
1a9745d2 | 1046 | &expr->where, slen, len); |
1bfea7e8 | 1047 | |
89f528df | 1048 | s[len] = '\0'; |
a270dc8e | 1049 | gfc_free (expr->value.character.string); |
1050 | expr->value.character.string = s; | |
1051 | expr->value.character.length = len; | |
1052 | } | |
1053 | } | |
4ee9c684 | 1054 | |
3b6a4b41 | 1055 | |
e14bee04 | 1056 | /* Function to create and update the enumerator history |
3b6a4b41 | 1057 | using the information passed as arguments. |
e14bee04 | 1058 | Pointer "max_enum" is also updated, to point to |
1059 | enum history node containing largest initializer. | |
3b6a4b41 | 1060 | |
1061 | SYM points to the symbol node of enumerator. | |
f6d0e37a | 1062 | INIT points to its enumerator value. */ |
3b6a4b41 | 1063 | |
e14bee04 | 1064 | static void |
1a9745d2 | 1065 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
3b6a4b41 | 1066 | { |
1067 | enumerator_history *new_enum_history; | |
1068 | gcc_assert (sym != NULL && init != NULL); | |
1069 | ||
1070 | new_enum_history = gfc_getmem (sizeof (enumerator_history)); | |
1071 | ||
1072 | new_enum_history->sym = sym; | |
1073 | new_enum_history->initializer = init; | |
1074 | new_enum_history->next = NULL; | |
1075 | ||
1076 | if (enum_history == NULL) | |
1077 | { | |
1078 | enum_history = new_enum_history; | |
1079 | max_enum = enum_history; | |
1080 | } | |
1081 | else | |
1082 | { | |
1083 | new_enum_history->next = enum_history; | |
1084 | enum_history = new_enum_history; | |
1085 | ||
e14bee04 | 1086 | if (mpz_cmp (max_enum->initializer->value.integer, |
3b6a4b41 | 1087 | new_enum_history->initializer->value.integer) < 0) |
1a9745d2 | 1088 | max_enum = new_enum_history; |
3b6a4b41 | 1089 | } |
1090 | } | |
1091 | ||
1092 | ||
e14bee04 | 1093 | /* Function to free enum kind history. */ |
3b6a4b41 | 1094 | |
e14bee04 | 1095 | void |
1a9745d2 | 1096 | gfc_free_enum_history (void) |
3b6a4b41 | 1097 | { |
e14bee04 | 1098 | enumerator_history *current = enum_history; |
1099 | enumerator_history *next; | |
3b6a4b41 | 1100 | |
1101 | while (current != NULL) | |
1102 | { | |
1103 | next = current->next; | |
1104 | gfc_free (current); | |
1105 | current = next; | |
1106 | } | |
1107 | max_enum = NULL; | |
1108 | enum_history = NULL; | |
1109 | } | |
1110 | ||
1111 | ||
4ee9c684 | 1112 | /* Function called by variable_decl() that adds an initialization |
1113 | expression to a symbol. */ | |
1114 | ||
1115 | static try | |
f6d0e37a | 1116 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) |
4ee9c684 | 1117 | { |
1118 | symbol_attribute attr; | |
1119 | gfc_symbol *sym; | |
1120 | gfc_expr *init; | |
1121 | ||
1122 | init = *initp; | |
1123 | if (find_special (name, &sym)) | |
1124 | return FAILURE; | |
1125 | ||
1126 | attr = sym->attr; | |
1127 | ||
1128 | /* If this symbol is confirming an implicit parameter type, | |
1129 | then an initialization expression is not allowed. */ | |
1130 | if (attr.flavor == FL_PARAMETER | |
1131 | && sym->value != NULL | |
1132 | && *initp != NULL) | |
1133 | { | |
1134 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
1135 | sym->name); | |
1136 | return FAILURE; | |
1137 | } | |
1138 | ||
6cbc841e | 1139 | if (attr.in_common |
1140 | && !attr.data | |
1141 | && *initp != NULL) | |
1142 | { | |
1143 | gfc_error ("Initializer not allowed for COMMON variable '%s' at %C", | |
1144 | sym->name); | |
1145 | return FAILURE; | |
1146 | } | |
1147 | ||
4ee9c684 | 1148 | if (init == NULL) |
1149 | { | |
1150 | /* An initializer is required for PARAMETER declarations. */ | |
1151 | if (attr.flavor == FL_PARAMETER) | |
1152 | { | |
1153 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
1154 | return FAILURE; | |
1155 | } | |
1156 | } | |
1157 | else | |
1158 | { | |
1159 | /* If a variable appears in a DATA block, it cannot have an | |
b97f1a18 | 1160 | initializer. */ |
4ee9c684 | 1161 | if (sym->attr.data) |
1162 | { | |
1a9745d2 | 1163 | gfc_error ("Variable '%s' at %C with an initializer already " |
1164 | "appears in a DATA statement", sym->name); | |
4ee9c684 | 1165 | return FAILURE; |
1166 | } | |
1167 | ||
cca3db55 | 1168 | /* Check if the assignment can happen. This has to be put off |
1169 | until later for a derived type variable. */ | |
4ee9c684 | 1170 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
1171 | && gfc_check_assign_symbol (sym, init) == FAILURE) | |
1172 | return FAILURE; | |
1173 | ||
a270dc8e | 1174 | if (sym->ts.type == BT_CHARACTER && sym->ts.cl) |
1175 | { | |
1176 | /* Update symbol character length according initializer. */ | |
1177 | if (sym->ts.cl->length == NULL) | |
1178 | { | |
03c2a028 | 1179 | int clen; |
f6d0e37a | 1180 | /* If there are multiple CHARACTER variables declared on the |
1181 | same line, we don't want them to share the same length. */ | |
ea13b9b7 | 1182 | sym->ts.cl = gfc_get_charlen (); |
1183 | sym->ts.cl->next = gfc_current_ns->cl_list; | |
1184 | gfc_current_ns->cl_list = sym->ts.cl; | |
e9c873a4 | 1185 | |
03c2a028 | 1186 | if (sym->attr.flavor == FL_PARAMETER) |
1187 | { | |
1188 | if (init->expr_type == EXPR_CONSTANT) | |
1189 | { | |
1190 | clen = init->value.character.length; | |
1191 | sym->ts.cl->length = gfc_int_expr (clen); | |
1192 | } | |
1193 | else if (init->expr_type == EXPR_ARRAY) | |
1194 | { | |
1195 | gfc_expr *p = init->value.constructor->expr; | |
1196 | clen = p->value.character.length; | |
1197 | sym->ts.cl->length = gfc_int_expr (clen); | |
1198 | } | |
1199 | else if (init->ts.cl && init->ts.cl->length) | |
1200 | sym->ts.cl->length = | |
1201 | gfc_copy_expr (sym->value->ts.cl->length); | |
1202 | } | |
a270dc8e | 1203 | } |
1204 | /* Update initializer character length according symbol. */ | |
1205 | else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT) | |
1206 | { | |
1207 | int len = mpz_get_si (sym->ts.cl->length->value.integer); | |
1208 | gfc_constructor * p; | |
1209 | ||
1210 | if (init->expr_type == EXPR_CONSTANT) | |
1bfea7e8 | 1211 | gfc_set_constant_character_len (len, init, false); |
a270dc8e | 1212 | else if (init->expr_type == EXPR_ARRAY) |
1213 | { | |
39908fd9 | 1214 | /* Build a new charlen to prevent simplification from |
1215 | deleting the length before it is resolved. */ | |
1216 | init->ts.cl = gfc_get_charlen (); | |
1217 | init->ts.cl->next = gfc_current_ns->cl_list; | |
1218 | gfc_current_ns->cl_list = sym->ts.cl; | |
a270dc8e | 1219 | init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length); |
39908fd9 | 1220 | |
a270dc8e | 1221 | for (p = init->value.constructor; p; p = p->next) |
1bfea7e8 | 1222 | gfc_set_constant_character_len (len, p->expr, false); |
a270dc8e | 1223 | } |
1224 | } | |
1225 | } | |
1226 | ||
c5d33754 | 1227 | /* Need to check if the expression we initialized this |
1228 | to was one of the iso_c_binding named constants. If so, | |
1229 | and we're a parameter (constant), let it be iso_c. | |
1230 | For example: | |
1231 | integer(c_int), parameter :: my_int = c_int | |
1232 | integer(my_int) :: my_int_2 | |
1233 | If we mark my_int as iso_c (since we can see it's value | |
1234 | is equal to one of the named constants), then my_int_2 | |
1235 | will be considered C interoperable. */ | |
1236 | if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) | |
1237 | { | |
1238 | sym->ts.is_iso_c |= init->ts.is_iso_c; | |
1239 | sym->ts.is_c_interop |= init->ts.is_c_interop; | |
1240 | /* attr bits needed for module files. */ | |
1241 | sym->attr.is_iso_c |= init->ts.is_iso_c; | |
1242 | sym->attr.is_c_interop |= init->ts.is_c_interop; | |
1243 | if (init->ts.is_iso_c) | |
1244 | sym->ts.f90_type = init->ts.f90_type; | |
1245 | } | |
1246 | ||
4ee9c684 | 1247 | /* Add initializer. Make sure we keep the ranks sane. */ |
1248 | if (sym->attr.dimension && init->rank == 0) | |
7baa3fb4 | 1249 | { |
1250 | mpz_t size; | |
1251 | gfc_expr *array; | |
1252 | gfc_constructor *c; | |
1253 | int n; | |
1254 | if (sym->attr.flavor == FL_PARAMETER | |
1255 | && init->expr_type == EXPR_CONSTANT | |
1256 | && spec_size (sym->as, &size) == SUCCESS | |
1257 | && mpz_cmp_si (size, 0) > 0) | |
1258 | { | |
1259 | array = gfc_start_constructor (init->ts.type, init->ts.kind, | |
1260 | &init->where); | |
1261 | ||
1262 | array->value.constructor = c = NULL; | |
1263 | for (n = 0; n < (int)mpz_get_si (size); n++) | |
1264 | { | |
1265 | if (array->value.constructor == NULL) | |
1266 | { | |
1267 | array->value.constructor = c = gfc_get_constructor (); | |
1268 | c->expr = init; | |
1269 | } | |
1270 | else | |
1271 | { | |
1272 | c->next = gfc_get_constructor (); | |
1273 | c = c->next; | |
1274 | c->expr = gfc_copy_expr (init); | |
1275 | } | |
1276 | } | |
1277 | ||
1278 | array->shape = gfc_get_shape (sym->as->rank); | |
1279 | for (n = 0; n < sym->as->rank; n++) | |
1280 | spec_dimen_size (sym->as, n, &array->shape[n]); | |
1281 | ||
1282 | init = array; | |
1283 | mpz_clear (size); | |
1284 | } | |
1285 | init->rank = sym->as->rank; | |
1286 | } | |
4ee9c684 | 1287 | |
1288 | sym->value = init; | |
3cd3c667 | 1289 | if (sym->attr.save == SAVE_NONE) |
1290 | sym->attr.save = SAVE_IMPLICIT; | |
4ee9c684 | 1291 | *initp = NULL; |
1292 | } | |
1293 | ||
1294 | return SUCCESS; | |
1295 | } | |
1296 | ||
1297 | ||
1298 | /* Function called by variable_decl() that adds a name to a structure | |
1299 | being built. */ | |
1300 | ||
1301 | static try | |
1a9745d2 | 1302 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
1303 | gfc_array_spec **as) | |
4ee9c684 | 1304 | { |
1305 | gfc_component *c; | |
1306 | ||
1307 | /* If the current symbol is of the same derived type that we're | |
1308 | constructing, it must have the pointer attribute. */ | |
1309 | if (current_ts.type == BT_DERIVED | |
1310 | && current_ts.derived == gfc_current_block () | |
1311 | && current_attr.pointer == 0) | |
1312 | { | |
1313 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1314 | return FAILURE; | |
1315 | } | |
1316 | ||
1a9745d2 | 1317 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
4ee9c684 | 1318 | { |
1319 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1320 | { | |
1321 | gfc_error ("Array component of structure at %C must have explicit " | |
1322 | "or deferred shape"); | |
1323 | return FAILURE; | |
1324 | } | |
1325 | } | |
1326 | ||
1327 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1328 | return FAILURE; | |
1329 | ||
1330 | c->ts = current_ts; | |
1331 | c->ts.cl = cl; | |
1332 | gfc_set_component_attr (c, ¤t_attr); | |
1333 | ||
1334 | c->initializer = *init; | |
1335 | *init = NULL; | |
1336 | ||
1337 | c->as = *as; | |
1338 | if (c->as != NULL) | |
1339 | c->dimension = 1; | |
1340 | *as = NULL; | |
1341 | ||
1342 | /* Check array components. */ | |
1343 | if (!c->dimension) | |
2294b616 | 1344 | { |
1345 | if (c->allocatable) | |
1346 | { | |
1347 | gfc_error ("Allocatable component at %C must be an array"); | |
1348 | return FAILURE; | |
1349 | } | |
1350 | else | |
1351 | return SUCCESS; | |
1352 | } | |
4ee9c684 | 1353 | |
1354 | if (c->pointer) | |
1355 | { | |
1356 | if (c->as->type != AS_DEFERRED) | |
1357 | { | |
2294b616 | 1358 | gfc_error ("Pointer array component of structure at %C must have a " |
1359 | "deferred shape"); | |
1360 | return FAILURE; | |
1361 | } | |
1362 | } | |
1363 | else if (c->allocatable) | |
1364 | { | |
1365 | if (c->as->type != AS_DEFERRED) | |
1366 | { | |
1367 | gfc_error ("Allocatable component of structure at %C must have a " | |
1368 | "deferred shape"); | |
4ee9c684 | 1369 | return FAILURE; |
1370 | } | |
1371 | } | |
1372 | else | |
1373 | { | |
1374 | if (c->as->type != AS_EXPLICIT) | |
1375 | { | |
1a9745d2 | 1376 | gfc_error ("Array component of structure at %C must have an " |
1377 | "explicit shape"); | |
4ee9c684 | 1378 | return FAILURE; |
1379 | } | |
1380 | } | |
1381 | ||
1382 | return SUCCESS; | |
1383 | } | |
1384 | ||
1385 | ||
1386 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1387 | ||
1388 | match | |
1a9745d2 | 1389 | gfc_match_null (gfc_expr **result) |
4ee9c684 | 1390 | { |
1391 | gfc_symbol *sym; | |
1392 | gfc_expr *e; | |
1393 | match m; | |
1394 | ||
1395 | m = gfc_match (" null ( )"); | |
1396 | if (m != MATCH_YES) | |
1397 | return m; | |
1398 | ||
1399 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1400 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1401 | { | |
1402 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1403 | return MATCH_ERROR; | |
1404 | } | |
1405 | ||
1406 | gfc_intrinsic_symbol (sym); | |
1407 | ||
1408 | if (sym->attr.proc != PROC_INTRINSIC | |
950683ed | 1409 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1410 | sym->name, NULL) == FAILURE | |
1411 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
4ee9c684 | 1412 | return MATCH_ERROR; |
1413 | ||
1414 | e = gfc_get_expr (); | |
cbb9e6aa | 1415 | e->where = gfc_current_locus; |
4ee9c684 | 1416 | e->expr_type = EXPR_NULL; |
1417 | e->ts.type = BT_UNKNOWN; | |
1418 | ||
1419 | *result = e; | |
1420 | ||
1421 | return MATCH_YES; | |
1422 | } | |
1423 | ||
1424 | ||
4ee9c684 | 1425 | /* Match a variable name with an optional initializer. When this |
1426 | subroutine is called, a variable is expected to be parsed next. | |
1427 | Depending on what is happening at the moment, updates either the | |
1428 | symbol table or the current interface. */ | |
1429 | ||
1430 | static match | |
3923b69f | 1431 | variable_decl (int elem) |
4ee9c684 | 1432 | { |
1433 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1434 | gfc_expr *initializer, *char_len; | |
1435 | gfc_array_spec *as; | |
b549d2a5 | 1436 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
4ee9c684 | 1437 | gfc_charlen *cl; |
1438 | locus var_locus; | |
1439 | match m; | |
1440 | try t; | |
b549d2a5 | 1441 | gfc_symbol *sym; |
3b6a4b41 | 1442 | locus old_locus; |
4ee9c684 | 1443 | |
1444 | initializer = NULL; | |
1445 | as = NULL; | |
b549d2a5 | 1446 | cp_as = NULL; |
3b6a4b41 | 1447 | old_locus = gfc_current_locus; |
4ee9c684 | 1448 | |
1449 | /* When we get here, we've just matched a list of attributes and | |
1450 | maybe a type and a double colon. The next thing we expect to see | |
1451 | is the name of the symbol. */ | |
1452 | m = gfc_match_name (name); | |
1453 | if (m != MATCH_YES) | |
1454 | goto cleanup; | |
1455 | ||
cbb9e6aa | 1456 | var_locus = gfc_current_locus; |
4ee9c684 | 1457 | |
1458 | /* Now we could see the optional array spec. or character length. */ | |
1459 | m = gfc_match_array_spec (&as); | |
b549d2a5 | 1460 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1461 | cp_as = gfc_copy_array_spec (as); | |
1462 | else if (m == MATCH_ERROR) | |
4ee9c684 | 1463 | goto cleanup; |
3b6a4b41 | 1464 | |
4ee9c684 | 1465 | if (m == MATCH_NO) |
1466 | as = gfc_copy_array_spec (current_as); | |
1467 | ||
1468 | char_len = NULL; | |
1469 | cl = NULL; | |
1470 | ||
1471 | if (current_ts.type == BT_CHARACTER) | |
1472 | { | |
1473 | switch (match_char_length (&char_len)) | |
1474 | { | |
1475 | case MATCH_YES: | |
1476 | cl = gfc_get_charlen (); | |
1477 | cl->next = gfc_current_ns->cl_list; | |
1478 | gfc_current_ns->cl_list = cl; | |
1479 | ||
1480 | cl->length = char_len; | |
1481 | break; | |
1482 | ||
3923b69f | 1483 | /* Non-constant lengths need to be copied after the first |
04b61f60 | 1484 | element. Also copy assumed lengths. */ |
4ee9c684 | 1485 | case MATCH_NO: |
04b61f60 | 1486 | if (elem > 1 |
1487 | && (current_ts.cl->length == NULL | |
1488 | || current_ts.cl->length->expr_type != EXPR_CONSTANT)) | |
3923b69f | 1489 | { |
1490 | cl = gfc_get_charlen (); | |
1491 | cl->next = gfc_current_ns->cl_list; | |
1492 | gfc_current_ns->cl_list = cl; | |
1493 | cl->length = gfc_copy_expr (current_ts.cl->length); | |
1494 | } | |
1495 | else | |
1496 | cl = current_ts.cl; | |
1497 | ||
4ee9c684 | 1498 | break; |
1499 | ||
1500 | case MATCH_ERROR: | |
1501 | goto cleanup; | |
1502 | } | |
1503 | } | |
1504 | ||
b549d2a5 | 1505 | /* If this symbol has already shown up in a Cray Pointer declaration, |
f6d0e37a | 1506 | then we want to set the type & bail out. */ |
b549d2a5 | 1507 | if (gfc_option.flag_cray_pointer) |
1508 | { | |
1509 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1510 | if (sym != NULL && sym->attr.cray_pointee) | |
1511 | { | |
1512 | sym->ts.type = current_ts.type; | |
1513 | sym->ts.kind = current_ts.kind; | |
1514 | sym->ts.cl = cl; | |
1515 | sym->ts.derived = current_ts.derived; | |
c5d33754 | 1516 | sym->ts.is_c_interop = current_ts.is_c_interop; |
1517 | sym->ts.is_iso_c = current_ts.is_iso_c; | |
b549d2a5 | 1518 | m = MATCH_YES; |
1519 | ||
1520 | /* Check to see if we have an array specification. */ | |
1521 | if (cp_as != NULL) | |
1522 | { | |
1523 | if (sym->as != NULL) | |
1524 | { | |
7698a624 | 1525 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 1526 | gfc_free_array_spec (cp_as); |
1527 | m = MATCH_ERROR; | |
1528 | goto cleanup; | |
1529 | } | |
1530 | else | |
1531 | { | |
1532 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1533 | gfc_internal_error ("Couldn't set pointee array spec."); | |
e14bee04 | 1534 | |
b549d2a5 | 1535 | /* Fix the array spec. */ |
e14bee04 | 1536 | m = gfc_mod_pointee_as (sym->as); |
b549d2a5 | 1537 | if (m == MATCH_ERROR) |
1538 | goto cleanup; | |
1539 | } | |
e14bee04 | 1540 | } |
b549d2a5 | 1541 | goto cleanup; |
1542 | } | |
1543 | else | |
1544 | { | |
1545 | gfc_free_array_spec (cp_as); | |
1546 | } | |
1547 | } | |
e14bee04 | 1548 | |
1549 | ||
4ee9c684 | 1550 | /* OK, we've successfully matched the declaration. Now put the |
1551 | symbol in the current namespace, because it might be used in the | |
fe06c0d5 | 1552 | optional initialization expression for this symbol, e.g. this is |
4ee9c684 | 1553 | perfectly legal: |
1554 | ||
1555 | integer, parameter :: i = huge(i) | |
1556 | ||
1557 | This is only true for parameters or variables of a basic type. | |
1558 | For components of derived types, it is not true, so we don't | |
1559 | create a symbol for those yet. If we fail to create the symbol, | |
1560 | bail out. */ | |
1561 | if (gfc_current_state () != COMP_DERIVED | |
1562 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1563 | { | |
b8a51d79 | 1564 | m = MATCH_ERROR; |
1565 | goto cleanup; | |
1566 | } | |
1567 | ||
60fbbf9e | 1568 | /* An interface body specifies all of the procedure's |
1569 | characteristics and these shall be consistent with those | |
1570 | specified in the procedure definition, except that the interface | |
1571 | may specify a procedure that is not pure if the procedure is | |
1572 | defined to be pure(12.3.2). */ | |
b8a51d79 | 1573 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1574 | && gfc_current_ns->proc_name |
1575 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
c723595c | 1576 | && current_ts.derived->ns != gfc_current_ns) |
1577 | { | |
1578 | gfc_symtree *st; | |
1579 | st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.derived->name); | |
1580 | if (!(current_ts.derived->attr.imported | |
1581 | && st != NULL | |
1582 | && st->n.sym == current_ts.derived) | |
1583 | && !gfc_current_ns->has_import_set) | |
1584 | { | |
1585 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1586 | "interface", name); | |
1587 | m = MATCH_ERROR; | |
1588 | goto cleanup; | |
1589 | } | |
4ee9c684 | 1590 | } |
1591 | ||
1592 | /* In functions that have a RESULT variable defined, the function | |
1593 | name always refers to function calls. Therefore, the name is | |
1594 | not allowed to appear in specification statements. */ | |
1595 | if (gfc_current_state () == COMP_FUNCTION | |
1596 | && gfc_current_block () != NULL | |
1597 | && gfc_current_block ()->result != NULL | |
1598 | && gfc_current_block ()->result != gfc_current_block () | |
1599 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1600 | { | |
1601 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1602 | m = MATCH_ERROR; | |
1603 | goto cleanup; | |
1604 | } | |
1605 | ||
b4f45d02 | 1606 | /* We allow old-style initializations of the form |
1607 | integer i /2/, j(4) /3*3, 1/ | |
1608 | (if no colon has been seen). These are different from data | |
1609 | statements in that initializers are only allowed to apply to the | |
1610 | variable immediately preceding, i.e. | |
1611 | integer i, j /1, 2/ | |
1612 | is not allowed. Therefore we have to do some work manually, that | |
cca3db55 | 1613 | could otherwise be left to the matchers for DATA statements. */ |
b4f45d02 | 1614 | |
1615 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1616 | { | |
1617 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1618 | "initialization at %C") == FAILURE) | |
1619 | return MATCH_ERROR; | |
e14bee04 | 1620 | |
b4f45d02 | 1621 | return match_old_style_init (name); |
1622 | } | |
1623 | ||
4ee9c684 | 1624 | /* The double colon must be present in order to have initializers. |
1625 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1626 | if (colon_seen) | |
1627 | { | |
1628 | if (gfc_match (" =>") == MATCH_YES) | |
1629 | { | |
4ee9c684 | 1630 | if (!current_attr.pointer) |
1631 | { | |
1632 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1633 | m = MATCH_ERROR; | |
1634 | goto cleanup; | |
1635 | } | |
1636 | ||
1637 | m = gfc_match_null (&initializer); | |
1638 | if (m == MATCH_NO) | |
1639 | { | |
e4789c62 | 1640 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
4ee9c684 | 1641 | m = MATCH_ERROR; |
1642 | } | |
1643 | ||
1644 | if (gfc_pure (NULL)) | |
1645 | { | |
1a9745d2 | 1646 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1647 | "a PURE procedure"); | |
4ee9c684 | 1648 | m = MATCH_ERROR; |
1649 | } | |
1650 | ||
1651 | if (m != MATCH_YES) | |
1652 | goto cleanup; | |
1653 | ||
4ee9c684 | 1654 | } |
1655 | else if (gfc_match_char ('=') == MATCH_YES) | |
1656 | { | |
1657 | if (current_attr.pointer) | |
1658 | { | |
1a9745d2 | 1659 | gfc_error ("Pointer initialization at %C requires '=>', " |
1660 | "not '='"); | |
4ee9c684 | 1661 | m = MATCH_ERROR; |
1662 | goto cleanup; | |
1663 | } | |
1664 | ||
1665 | m = gfc_match_init_expr (&initializer); | |
1666 | if (m == MATCH_NO) | |
1667 | { | |
1668 | gfc_error ("Expected an initialization expression at %C"); | |
1669 | m = MATCH_ERROR; | |
1670 | } | |
1671 | ||
1672 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1673 | { | |
1a9745d2 | 1674 | gfc_error ("Initialization of variable at %C is not allowed in " |
1675 | "a PURE procedure"); | |
4ee9c684 | 1676 | m = MATCH_ERROR; |
1677 | } | |
1678 | ||
1679 | if (m != MATCH_YES) | |
1680 | goto cleanup; | |
1681 | } | |
8ffad0f9 | 1682 | } |
1683 | ||
2294b616 | 1684 | if (initializer != NULL && current_attr.allocatable |
1685 | && gfc_current_state () == COMP_DERIVED) | |
1686 | { | |
1a9745d2 | 1687 | gfc_error ("Initialization of allocatable component at %C is not " |
1688 | "allowed"); | |
2294b616 | 1689 | m = MATCH_ERROR; |
1690 | goto cleanup; | |
1691 | } | |
1692 | ||
d9b3f26b | 1693 | /* Add the initializer. Note that it is fine if initializer is |
4ee9c684 | 1694 | NULL here, because we sometimes also need to check if a |
1695 | declaration *must* have an initialization expression. */ | |
1696 | if (gfc_current_state () != COMP_DERIVED) | |
1697 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1698 | else | |
d9b3f26b | 1699 | { |
2294b616 | 1700 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1701 | && !current_attr.pointer && !initializer) |
d9b3f26b | 1702 | initializer = gfc_default_initializer (¤t_ts); |
1703 | t = build_struct (name, cl, &initializer, &as); | |
1704 | } | |
4ee9c684 | 1705 | |
1706 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1707 | ||
1708 | cleanup: | |
1709 | /* Free stuff up and return. */ | |
1710 | gfc_free_expr (initializer); | |
1711 | gfc_free_array_spec (as); | |
1712 | ||
1713 | return m; | |
1714 | } | |
1715 | ||
1716 | ||
d10f89ee | 1717 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
1718 | This assumes that the byte size is equal to the kind number for | |
1719 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
4ee9c684 | 1720 | |
1721 | match | |
1a9745d2 | 1722 | gfc_match_old_kind_spec (gfc_typespec *ts) |
4ee9c684 | 1723 | { |
1724 | match m; | |
3bd3b616 | 1725 | int original_kind; |
4ee9c684 | 1726 | |
1727 | if (gfc_match_char ('*') != MATCH_YES) | |
1728 | return MATCH_NO; | |
1729 | ||
3bd3b616 | 1730 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
4ee9c684 | 1731 | if (m != MATCH_YES) |
1732 | return MATCH_ERROR; | |
1733 | ||
b118a35b | 1734 | original_kind = ts->kind; |
1735 | ||
4ee9c684 | 1736 | /* Massage the kind numbers for complex types. */ |
b118a35b | 1737 | if (ts->type == BT_COMPLEX) |
1738 | { | |
1739 | if (ts->kind % 2) | |
1a9745d2 | 1740 | { |
1741 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1742 | gfc_basic_typename (ts->type), original_kind); | |
1743 | return MATCH_ERROR; | |
1744 | } | |
b118a35b | 1745 | ts->kind /= 2; |
1746 | } | |
4ee9c684 | 1747 | |
f2d4ef3b | 1748 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1749 | { |
b118a35b | 1750 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
1a9745d2 | 1751 | gfc_basic_typename (ts->type), original_kind); |
4ee9c684 | 1752 | return MATCH_ERROR; |
1753 | } | |
1754 | ||
be7f01a1 | 1755 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
1756 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1757 | return MATCH_ERROR; | |
1758 | ||
4ee9c684 | 1759 | return MATCH_YES; |
1760 | } | |
1761 | ||
1762 | ||
1763 | /* Match a kind specification. Since kinds are generally optional, we | |
1764 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1765 | string is found, then we know we have an error. */ | |
1766 | ||
1767 | match | |
67a51c8e | 1768 | gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only) |
4ee9c684 | 1769 | { |
67a51c8e | 1770 | locus where, loc; |
4ee9c684 | 1771 | gfc_expr *e; |
1772 | match m, n; | |
1773 | const char *msg; | |
1774 | ||
1775 | m = MATCH_NO; | |
67a51c8e | 1776 | n = MATCH_YES; |
4ee9c684 | 1777 | e = NULL; |
1778 | ||
67a51c8e | 1779 | where = loc = gfc_current_locus; |
1780 | ||
1781 | if (kind_expr_only) | |
1782 | goto kind_expr; | |
4ee9c684 | 1783 | |
1784 | if (gfc_match_char ('(') == MATCH_NO) | |
1785 | return MATCH_NO; | |
1786 | ||
1787 | /* Also gobbles optional text. */ | |
1788 | if (gfc_match (" kind = ") == MATCH_YES) | |
1789 | m = MATCH_ERROR; | |
1790 | ||
67a51c8e | 1791 | loc = gfc_current_locus; |
1792 | ||
1793 | kind_expr: | |
4ee9c684 | 1794 | n = gfc_match_init_expr (&e); |
67a51c8e | 1795 | |
4ee9c684 | 1796 | if (n != MATCH_YES) |
67a51c8e | 1797 | { |
1798 | if (gfc_current_state () == COMP_INTERFACE | |
1799 | || gfc_current_state () == COMP_NONE | |
1800 | || gfc_current_state () == COMP_CONTAINS) | |
1801 | { | |
1802 | /* Signal using kind = -1 that the expression might include | |
1803 | use associated or imported parameters and try again after | |
1804 | the specification expressions..... */ | |
1805 | if (gfc_match_char (')') != MATCH_YES) | |
1806 | { | |
1807 | gfc_error ("Missing right parenthesis at %C"); | |
1808 | m = MATCH_ERROR; | |
1809 | goto no_match; | |
1810 | } | |
1811 | ||
1812 | gfc_free_expr (e); | |
1813 | ts->kind = -1; | |
1814 | gfc_function_kind_locus = loc; | |
1815 | gfc_undo_symbols (); | |
1816 | return MATCH_YES; | |
1817 | } | |
1818 | else | |
1819 | { | |
1820 | /* ....or else, the match is real. */ | |
1821 | if (n == MATCH_NO) | |
1822 | gfc_error ("Expected initialization expression at %C"); | |
1823 | if (n != MATCH_YES) | |
1824 | return MATCH_ERROR; | |
1825 | } | |
1826 | } | |
4ee9c684 | 1827 | |
1828 | if (e->rank != 0) | |
1829 | { | |
1830 | gfc_error ("Expected scalar initialization expression at %C"); | |
1831 | m = MATCH_ERROR; | |
1832 | goto no_match; | |
1833 | } | |
1834 | ||
1835 | msg = gfc_extract_int (e, &ts->kind); | |
1836 | if (msg != NULL) | |
1837 | { | |
1838 | gfc_error (msg); | |
1839 | m = MATCH_ERROR; | |
1840 | goto no_match; | |
1841 | } | |
1842 | ||
c5d33754 | 1843 | /* Before throwing away the expression, let's see if we had a |
1844 | C interoperable kind (and store the fact). */ | |
1845 | if (e->ts.is_c_interop == 1) | |
1846 | { | |
1847 | /* Mark this as c interoperable if being declared with one | |
1848 | of the named constants from iso_c_binding. */ | |
1849 | ts->is_c_interop = e->ts.is_iso_c; | |
1850 | ts->f90_type = e->ts.f90_type; | |
1851 | } | |
1852 | ||
4ee9c684 | 1853 | gfc_free_expr (e); |
1854 | e = NULL; | |
1855 | ||
c5d33754 | 1856 | /* Ignore errors to this point, if we've gotten here. This means |
1857 | we ignore the m=MATCH_ERROR from above. */ | |
f2d4ef3b | 1858 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1859 | { |
1860 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
1861 | gfc_basic_typename (ts->type)); | |
4ee9c684 | 1862 | m = MATCH_ERROR; |
4ee9c684 | 1863 | } |
c5d33754 | 1864 | else if (gfc_match_char (')') != MATCH_YES) |
4ee9c684 | 1865 | { |
d67fc9ae | 1866 | gfc_error ("Missing right parenthesis at %C"); |
67a51c8e | 1867 | m = MATCH_ERROR; |
4ee9c684 | 1868 | } |
c5d33754 | 1869 | else |
1870 | /* All tests passed. */ | |
1871 | m = MATCH_YES; | |
4ee9c684 | 1872 | |
c5d33754 | 1873 | if(m == MATCH_ERROR) |
1874 | gfc_current_locus = where; | |
1875 | ||
1876 | /* Return what we know from the test(s). */ | |
1877 | return m; | |
4ee9c684 | 1878 | |
1879 | no_match: | |
1880 | gfc_free_expr (e); | |
cbb9e6aa | 1881 | gfc_current_locus = where; |
4ee9c684 | 1882 | return m; |
1883 | } | |
1884 | ||
1885 | ||
1886 | /* Match the various kind/length specifications in a CHARACTER | |
1887 | declaration. We don't return MATCH_NO. */ | |
1888 | ||
1889 | static match | |
1a9745d2 | 1890 | match_char_spec (gfc_typespec *ts) |
4ee9c684 | 1891 | { |
2fe2caa6 | 1892 | int kind, seen_length; |
4ee9c684 | 1893 | gfc_charlen *cl; |
1894 | gfc_expr *len; | |
1895 | match m; | |
c5d33754 | 1896 | gfc_expr *kind_expr = NULL; |
b8a891cb | 1897 | kind = gfc_default_character_kind; |
4ee9c684 | 1898 | len = NULL; |
1899 | seen_length = 0; | |
1900 | ||
1901 | /* Try the old-style specification first. */ | |
1902 | old_char_selector = 0; | |
1903 | ||
1904 | m = match_char_length (&len); | |
1905 | if (m != MATCH_NO) | |
1906 | { | |
1907 | if (m == MATCH_YES) | |
1908 | old_char_selector = 1; | |
1909 | seen_length = 1; | |
1910 | goto done; | |
1911 | } | |
1912 | ||
1913 | m = gfc_match_char ('('); | |
1914 | if (m != MATCH_YES) | |
1915 | { | |
c5d33754 | 1916 | m = MATCH_YES; /* Character without length is a single char. */ |
4ee9c684 | 1917 | goto done; |
1918 | } | |
1919 | ||
c5d33754 | 1920 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ |
4ee9c684 | 1921 | if (gfc_match (" kind =") == MATCH_YES) |
1922 | { | |
c5d33754 | 1923 | m = gfc_match_small_int_expr(&kind, &kind_expr); |
1924 | ||
4ee9c684 | 1925 | if (m == MATCH_ERROR) |
1926 | goto done; | |
1927 | if (m == MATCH_NO) | |
1928 | goto syntax; | |
1929 | ||
1930 | if (gfc_match (" , len =") == MATCH_NO) | |
1931 | goto rparen; | |
1932 | ||
1933 | m = char_len_param_value (&len); | |
1934 | if (m == MATCH_NO) | |
1935 | goto syntax; | |
1936 | if (m == MATCH_ERROR) | |
1937 | goto done; | |
1938 | seen_length = 1; | |
1939 | ||
1940 | goto rparen; | |
1941 | } | |
1942 | ||
f6d0e37a | 1943 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ |
4ee9c684 | 1944 | if (gfc_match (" len =") == MATCH_YES) |
1945 | { | |
1946 | m = char_len_param_value (&len); | |
1947 | if (m == MATCH_NO) | |
1948 | goto syntax; | |
1949 | if (m == MATCH_ERROR) | |
1950 | goto done; | |
1951 | seen_length = 1; | |
1952 | ||
1953 | if (gfc_match_char (')') == MATCH_YES) | |
1954 | goto done; | |
1955 | ||
1956 | if (gfc_match (" , kind =") != MATCH_YES) | |
1957 | goto syntax; | |
1958 | ||
c5d33754 | 1959 | gfc_match_small_int_expr(&kind, &kind_expr); |
4ee9c684 | 1960 | |
f2d4ef3b | 1961 | if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
4ee9c684 | 1962 | { |
1963 | gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); | |
1964 | return MATCH_YES; | |
1965 | } | |
1966 | ||
1967 | goto rparen; | |
1968 | } | |
1969 | ||
f6d0e37a | 1970 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
4ee9c684 | 1971 | m = char_len_param_value (&len); |
1972 | if (m == MATCH_NO) | |
1973 | goto syntax; | |
1974 | if (m == MATCH_ERROR) | |
1975 | goto done; | |
1976 | seen_length = 1; | |
1977 | ||
1978 | m = gfc_match_char (')'); | |
1979 | if (m == MATCH_YES) | |
1980 | goto done; | |
1981 | ||
1982 | if (gfc_match_char (',') != MATCH_YES) | |
1983 | goto syntax; | |
1984 | ||
c5d33754 | 1985 | gfc_match (" kind ="); /* Gobble optional text. */ |
4ee9c684 | 1986 | |
c5d33754 | 1987 | m = gfc_match_small_int_expr(&kind, &kind_expr); |
4ee9c684 | 1988 | if (m == MATCH_ERROR) |
1989 | goto done; | |
1990 | if (m == MATCH_NO) | |
1991 | goto syntax; | |
1992 | ||
1993 | rparen: | |
1994 | /* Require a right-paren at this point. */ | |
1995 | m = gfc_match_char (')'); | |
1996 | if (m == MATCH_YES) | |
1997 | goto done; | |
1998 | ||
1999 | syntax: | |
2000 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
2001 | m = MATCH_ERROR; | |
a3cbe8cc | 2002 | gfc_free_expr (len); |
2003 | return m; | |
4ee9c684 | 2004 | |
2005 | done: | |
a3cbe8cc | 2006 | if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
4ee9c684 | 2007 | { |
2008 | gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); | |
2009 | m = MATCH_ERROR; | |
2010 | } | |
2011 | ||
a3cbe8cc | 2012 | if (seen_length == 1 && len != NULL |
2013 | && len->ts.type != BT_INTEGER && len->ts.type != BT_UNKNOWN) | |
2014 | { | |
2015 | gfc_error ("Expression at %C must be of INTEGER type"); | |
2016 | m = MATCH_ERROR; | |
2017 | } | |
2018 | ||
4ee9c684 | 2019 | if (m != MATCH_YES) |
2020 | { | |
2021 | gfc_free_expr (len); | |
c5d33754 | 2022 | gfc_free_expr (kind_expr); |
4ee9c684 | 2023 | return m; |
2024 | } | |
2025 | ||
2026 | /* Do some final massaging of the length values. */ | |
2027 | cl = gfc_get_charlen (); | |
2028 | cl->next = gfc_current_ns->cl_list; | |
2029 | gfc_current_ns->cl_list = cl; | |
2030 | ||
2031 | if (seen_length == 0) | |
2032 | cl->length = gfc_int_expr (1); | |
2033 | else | |
2fe2caa6 | 2034 | cl->length = len; |
4ee9c684 | 2035 | |
2036 | ts->cl = cl; | |
2037 | ts->kind = kind; | |
2038 | ||
c5d33754 | 2039 | /* We have to know if it was a c interoperable kind so we can |
2040 | do accurate type checking of bind(c) procs, etc. */ | |
2041 | if (kind_expr != NULL) | |
2042 | { | |
2043 | /* Mark this as c interoperable if being declared with one | |
2044 | of the named constants from iso_c_binding. */ | |
2045 | ts->is_c_interop = kind_expr->ts.is_iso_c; | |
2046 | gfc_free_expr (kind_expr); | |
2047 | } | |
2048 | else if (len != NULL) | |
2049 | { | |
2050 | /* Here, we might have parsed something such as: | |
2051 | character(c_char) | |
2052 | In this case, the parsing code above grabs the c_char when | |
2053 | looking for the length (line 1690, roughly). it's the last | |
2054 | testcase for parsing the kind params of a character variable. | |
2055 | However, it's not actually the length. this seems like it | |
2056 | could be an error. | |
2057 | To see if the user used a C interop kind, test the expr | |
2058 | of the so called length, and see if it's C interoperable. */ | |
2059 | ts->is_c_interop = len->ts.is_iso_c; | |
2060 | } | |
2061 | ||
4ee9c684 | 2062 | return MATCH_YES; |
2063 | } | |
2064 | ||
2065 | ||
2066 | /* Matches a type specification. If successful, sets the ts structure | |
2067 | to the matched specification. This is necessary for FUNCTION and | |
2068 | IMPLICIT statements. | |
2069 | ||
e14bee04 | 2070 | If implicit_flag is nonzero, then we don't check for the optional |
39351103 | 2071 | kind specification. Not doing so is needed for matching an IMPLICIT |
4ee9c684 | 2072 | statement correctly. */ |
2073 | ||
67a51c8e | 2074 | match |
2075 | gfc_match_type_spec (gfc_typespec *ts, int implicit_flag) | |
4ee9c684 | 2076 | { |
2077 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2078 | gfc_symbol *sym; | |
2079 | match m; | |
18f3698a | 2080 | int c; |
67a51c8e | 2081 | locus loc = gfc_current_locus; |
4ee9c684 | 2082 | |
2083 | gfc_clear_ts (ts); | |
2084 | ||
c5d33754 | 2085 | /* Clear the current binding label, in case one is given. */ |
2086 | curr_binding_label[0] = '\0'; | |
2087 | ||
25b29122 | 2088 | if (gfc_match (" byte") == MATCH_YES) |
2089 | { | |
e14bee04 | 2090 | if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C") |
25b29122 | 2091 | == FAILURE) |
2092 | return MATCH_ERROR; | |
2093 | ||
2094 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
2095 | { | |
2096 | gfc_error ("BYTE type used at %C " | |
2097 | "is not available on the target machine"); | |
2098 | return MATCH_ERROR; | |
2099 | } | |
e14bee04 | 2100 | |
25b29122 | 2101 | ts->type = BT_INTEGER; |
2102 | ts->kind = 1; | |
2103 | return MATCH_YES; | |
2104 | } | |
2105 | ||
4ee9c684 | 2106 | if (gfc_match (" integer") == MATCH_YES) |
2107 | { | |
2108 | ts->type = BT_INTEGER; | |
b8a891cb | 2109 | ts->kind = gfc_default_integer_kind; |
4ee9c684 | 2110 | goto get_kind; |
2111 | } | |
2112 | ||
2113 | if (gfc_match (" character") == MATCH_YES) | |
2114 | { | |
2115 | ts->type = BT_CHARACTER; | |
39351103 | 2116 | if (implicit_flag == 0) |
2117 | return match_char_spec (ts); | |
2118 | else | |
2119 | return MATCH_YES; | |
4ee9c684 | 2120 | } |
2121 | ||
2122 | if (gfc_match (" real") == MATCH_YES) | |
2123 | { | |
2124 | ts->type = BT_REAL; | |
b8a891cb | 2125 | ts->kind = gfc_default_real_kind; |
4ee9c684 | 2126 | goto get_kind; |
2127 | } | |
2128 | ||
2129 | if (gfc_match (" double precision") == MATCH_YES) | |
2130 | { | |
2131 | ts->type = BT_REAL; | |
b8a891cb | 2132 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2133 | return MATCH_YES; |
2134 | } | |
2135 | ||
2136 | if (gfc_match (" complex") == MATCH_YES) | |
2137 | { | |
2138 | ts->type = BT_COMPLEX; | |
b8a891cb | 2139 | ts->kind = gfc_default_complex_kind; |
4ee9c684 | 2140 | goto get_kind; |
2141 | } | |
2142 | ||
2143 | if (gfc_match (" double complex") == MATCH_YES) | |
2144 | { | |
be7f01a1 | 2145 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
2146 | "conform to the Fortran 95 standard") == FAILURE) | |
2147 | return MATCH_ERROR; | |
2148 | ||
4ee9c684 | 2149 | ts->type = BT_COMPLEX; |
b8a891cb | 2150 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2151 | return MATCH_YES; |
2152 | } | |
2153 | ||
2154 | if (gfc_match (" logical") == MATCH_YES) | |
2155 | { | |
2156 | ts->type = BT_LOGICAL; | |
b8a891cb | 2157 | ts->kind = gfc_default_logical_kind; |
4ee9c684 | 2158 | goto get_kind; |
2159 | } | |
2160 | ||
2161 | m = gfc_match (" type ( %n )", name); | |
2162 | if (m != MATCH_YES) | |
2163 | return m; | |
2164 | ||
67a51c8e | 2165 | if (gfc_current_state () == COMP_INTERFACE |
2166 | || gfc_current_state () == COMP_NONE) | |
2167 | { | |
2168 | gfc_function_type_locus = loc; | |
2169 | ts->type = BT_UNKNOWN; | |
2170 | ts->kind = -1; | |
2171 | return MATCH_YES; | |
2172 | } | |
2173 | ||
2174 | /* Search for the name but allow the components to be defined later. If | |
2175 | type = -1, this typespec has been seen in a function declaration but | |
2176 | the type could not legally be accessed at that point. */ | |
2177 | if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym)) | |
4ee9c684 | 2178 | { |
2179 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2180 | return MATCH_ERROR; | |
2181 | } | |
67a51c8e | 2182 | else if (ts->kind == -1) |
2183 | { | |
2184 | if (gfc_find_symbol (name, NULL, 0, &sym)) | |
2185 | { | |
2186 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2187 | return MATCH_ERROR; | |
2188 | } | |
2189 | ||
2190 | if (sym == NULL) | |
2191 | return MATCH_NO; | |
2192 | } | |
4ee9c684 | 2193 | |
2194 | if (sym->attr.flavor != FL_DERIVED | |
950683ed | 2195 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 2196 | return MATCH_ERROR; |
2197 | ||
2198 | ts->type = BT_DERIVED; | |
2199 | ts->kind = 0; | |
2200 | ts->derived = sym; | |
2201 | ||
2202 | return MATCH_YES; | |
2203 | ||
2204 | get_kind: | |
2205 | /* For all types except double, derived and character, look for an | |
2206 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
39351103 | 2207 | if (implicit_flag == 1) |
4ee9c684 | 2208 | return MATCH_YES; |
2209 | ||
18f3698a | 2210 | if (gfc_current_form == FORM_FREE) |
2211 | { | |
2212 | c = gfc_peek_char(); | |
2213 | if (!gfc_is_whitespace(c) && c != '*' && c != '(' | |
1a9745d2 | 2214 | && c != ':' && c != ',') |
18f3698a | 2215 | return MATCH_NO; |
2216 | } | |
2217 | ||
67a51c8e | 2218 | m = gfc_match_kind_spec (ts, false); |
4ee9c684 | 2219 | if (m == MATCH_NO && ts->type != BT_CHARACTER) |
2220 | m = gfc_match_old_kind_spec (ts); | |
2221 | ||
2222 | if (m == MATCH_NO) | |
2223 | m = MATCH_YES; /* No kind specifier found. */ | |
2224 | ||
2225 | return m; | |
2226 | } | |
2227 | ||
2228 | ||
39351103 | 2229 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
2230 | already matched in parse.c, or we would not end up here in the | |
2231 | first place. So the only thing we need to check, is if there is | |
2232 | trailing garbage. If not, the match is successful. */ | |
2233 | ||
2234 | match | |
2235 | gfc_match_implicit_none (void) | |
2236 | { | |
39351103 | 2237 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
2238 | } | |
2239 | ||
2240 | ||
2241 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
2242 | ||
2243 | static match | |
b70528c7 | 2244 | match_implicit_range (void) |
39351103 | 2245 | { |
2246 | int c, c1, c2, inner; | |
2247 | locus cur_loc; | |
2248 | ||
2249 | cur_loc = gfc_current_locus; | |
2250 | ||
2251 | gfc_gobble_whitespace (); | |
2252 | c = gfc_next_char (); | |
2253 | if (c != '(') | |
2254 | { | |
2255 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
2256 | goto bad; | |
2257 | } | |
2258 | ||
2259 | inner = 1; | |
2260 | while (inner) | |
2261 | { | |
2262 | gfc_gobble_whitespace (); | |
2263 | c1 = gfc_next_char (); | |
2264 | if (!ISALPHA (c1)) | |
2265 | goto bad; | |
2266 | ||
2267 | gfc_gobble_whitespace (); | |
2268 | c = gfc_next_char (); | |
2269 | ||
2270 | switch (c) | |
2271 | { | |
2272 | case ')': | |
f6d0e37a | 2273 | inner = 0; /* Fall through. */ |
39351103 | 2274 | |
2275 | case ',': | |
2276 | c2 = c1; | |
2277 | break; | |
2278 | ||
2279 | case '-': | |
2280 | gfc_gobble_whitespace (); | |
2281 | c2 = gfc_next_char (); | |
2282 | if (!ISALPHA (c2)) | |
2283 | goto bad; | |
2284 | ||
2285 | gfc_gobble_whitespace (); | |
2286 | c = gfc_next_char (); | |
2287 | ||
2288 | if ((c != ',') && (c != ')')) | |
2289 | goto bad; | |
2290 | if (c == ')') | |
2291 | inner = 0; | |
2292 | ||
2293 | break; | |
2294 | ||
2295 | default: | |
2296 | goto bad; | |
2297 | } | |
2298 | ||
2299 | if (c1 > c2) | |
2300 | { | |
2301 | gfc_error ("Letters must be in alphabetic order in " | |
2302 | "IMPLICIT statement at %C"); | |
2303 | goto bad; | |
2304 | } | |
2305 | ||
2306 | /* See if we can add the newly matched range to the pending | |
1a9745d2 | 2307 | implicits from this IMPLICIT statement. We do not check for |
2308 | conflicts with whatever earlier IMPLICIT statements may have | |
2309 | set. This is done when we've successfully finished matching | |
2310 | the current one. */ | |
b70528c7 | 2311 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
39351103 | 2312 | goto bad; |
2313 | } | |
2314 | ||
2315 | return MATCH_YES; | |
2316 | ||
2317 | bad: | |
2318 | gfc_syntax_error (ST_IMPLICIT); | |
2319 | ||
2320 | gfc_current_locus = cur_loc; | |
2321 | return MATCH_ERROR; | |
2322 | } | |
2323 | ||
2324 | ||
2325 | /* Match an IMPLICIT statement, storing the types for | |
2326 | gfc_set_implicit() if the statement is accepted by the parser. | |
2327 | There is a strange looking, but legal syntactic construction | |
2328 | possible. It looks like: | |
2329 | ||
2330 | IMPLICIT INTEGER (a-b) (c-d) | |
2331 | ||
2332 | This is legal if "a-b" is a constant expression that happens to | |
2333 | equal one of the legal kinds for integers. The real problem | |
2334 | happens with an implicit specification that looks like: | |
2335 | ||
2336 | IMPLICIT INTEGER (a-b) | |
2337 | ||
2338 | In this case, a typespec matcher that is "greedy" (as most of the | |
2339 | matchers are) gobbles the character range as a kindspec, leaving | |
2340 | nothing left. We therefore have to go a bit more slowly in the | |
2341 | matching process by inhibiting the kindspec checking during | |
2342 | typespec matching and checking for a kind later. */ | |
2343 | ||
2344 | match | |
2345 | gfc_match_implicit (void) | |
2346 | { | |
2347 | gfc_typespec ts; | |
2348 | locus cur_loc; | |
2349 | int c; | |
2350 | match m; | |
2351 | ||
2352 | /* We don't allow empty implicit statements. */ | |
2353 | if (gfc_match_eos () == MATCH_YES) | |
2354 | { | |
2355 | gfc_error ("Empty IMPLICIT statement at %C"); | |
2356 | return MATCH_ERROR; | |
2357 | } | |
2358 | ||
39351103 | 2359 | do |
2360 | { | |
b70528c7 | 2361 | /* First cleanup. */ |
2362 | gfc_clear_new_implicit (); | |
2363 | ||
39351103 | 2364 | /* A basic type is mandatory here. */ |
67a51c8e | 2365 | m = gfc_match_type_spec (&ts, 1); |
39351103 | 2366 | if (m == MATCH_ERROR) |
2367 | goto error; | |
2368 | if (m == MATCH_NO) | |
2369 | goto syntax; | |
2370 | ||
2371 | cur_loc = gfc_current_locus; | |
b70528c7 | 2372 | m = match_implicit_range (); |
39351103 | 2373 | |
2374 | if (m == MATCH_YES) | |
2375 | { | |
b70528c7 | 2376 | /* We may have <TYPE> (<RANGE>). */ |
39351103 | 2377 | gfc_gobble_whitespace (); |
2378 | c = gfc_next_char (); | |
2379 | if ((c == '\n') || (c == ',')) | |
b70528c7 | 2380 | { |
2381 | /* Check for CHARACTER with no length parameter. */ | |
2382 | if (ts.type == BT_CHARACTER && !ts.cl) | |
2383 | { | |
b8a891cb | 2384 | ts.kind = gfc_default_character_kind; |
b70528c7 | 2385 | ts.cl = gfc_get_charlen (); |
2386 | ts.cl->next = gfc_current_ns->cl_list; | |
2387 | gfc_current_ns->cl_list = ts.cl; | |
2388 | ts.cl->length = gfc_int_expr (1); | |
2389 | } | |
2390 | ||
2391 | /* Record the Successful match. */ | |
2392 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2393 | return MATCH_ERROR; | |
2394 | continue; | |
2395 | } | |
39351103 | 2396 | |
2397 | gfc_current_locus = cur_loc; | |
2398 | } | |
2399 | ||
b70528c7 | 2400 | /* Discard the (incorrectly) matched range. */ |
2401 | gfc_clear_new_implicit (); | |
2402 | ||
2403 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
2404 | if (ts.type == BT_CHARACTER) | |
2405 | m = match_char_spec (&ts); | |
2406 | else | |
39351103 | 2407 | { |
67a51c8e | 2408 | m = gfc_match_kind_spec (&ts, false); |
39351103 | 2409 | if (m == MATCH_NO) |
b70528c7 | 2410 | { |
2411 | m = gfc_match_old_kind_spec (&ts); | |
2412 | if (m == MATCH_ERROR) | |
2413 | goto error; | |
2414 | if (m == MATCH_NO) | |
2415 | goto syntax; | |
2416 | } | |
39351103 | 2417 | } |
b70528c7 | 2418 | if (m == MATCH_ERROR) |
2419 | goto error; | |
39351103 | 2420 | |
b70528c7 | 2421 | m = match_implicit_range (); |
39351103 | 2422 | if (m == MATCH_ERROR) |
2423 | goto error; | |
2424 | if (m == MATCH_NO) | |
2425 | goto syntax; | |
2426 | ||
2427 | gfc_gobble_whitespace (); | |
2428 | c = gfc_next_char (); | |
2429 | if ((c != '\n') && (c != ',')) | |
2430 | goto syntax; | |
2431 | ||
b70528c7 | 2432 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2433 | return MATCH_ERROR; | |
39351103 | 2434 | } |
2435 | while (c == ','); | |
2436 | ||
b70528c7 | 2437 | return MATCH_YES; |
39351103 | 2438 | |
2439 | syntax: | |
2440 | gfc_syntax_error (ST_IMPLICIT); | |
2441 | ||
2442 | error: | |
2443 | return MATCH_ERROR; | |
2444 | } | |
2445 | ||
f6d0e37a | 2446 | |
d67fc9ae | 2447 | match |
2448 | gfc_match_import (void) | |
2449 | { | |
2450 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2451 | match m; | |
2452 | gfc_symbol *sym; | |
2453 | gfc_symtree *st; | |
2454 | ||
f6d0e37a | 2455 | if (gfc_current_ns->proc_name == NULL |
2456 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
d67fc9ae | 2457 | { |
2458 | gfc_error ("IMPORT statement at %C only permitted in " | |
2459 | "an INTERFACE body"); | |
2460 | return MATCH_ERROR; | |
2461 | } | |
2462 | ||
1a9745d2 | 2463 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
d67fc9ae | 2464 | == FAILURE) |
2465 | return MATCH_ERROR; | |
2466 | ||
2467 | if (gfc_match_eos () == MATCH_YES) | |
2468 | { | |
2469 | /* All host variables should be imported. */ | |
2470 | gfc_current_ns->has_import_set = 1; | |
2471 | return MATCH_YES; | |
2472 | } | |
2473 | ||
2474 | if (gfc_match (" ::") == MATCH_YES) | |
2475 | { | |
2476 | if (gfc_match_eos () == MATCH_YES) | |
1a9745d2 | 2477 | { |
2478 | gfc_error ("Expecting list of named entities at %C"); | |
2479 | return MATCH_ERROR; | |
2480 | } | |
d67fc9ae | 2481 | } |
2482 | ||
2483 | for(;;) | |
2484 | { | |
2485 | m = gfc_match (" %n", name); | |
2486 | switch (m) | |
2487 | { | |
2488 | case MATCH_YES: | |
096d4ad9 | 2489 | if (gfc_current_ns->parent != NULL |
f6d0e37a | 2490 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
096d4ad9 | 2491 | { |
2492 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2493 | return MATCH_ERROR; | |
2494 | } | |
2495 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
f6d0e37a | 2496 | && gfc_find_symbol (name, |
2497 | gfc_current_ns->proc_name->ns->parent, | |
2498 | 1, &sym)) | |
1a9745d2 | 2499 | { |
2500 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2501 | return MATCH_ERROR; | |
2502 | } | |
2503 | ||
2504 | if (sym == NULL) | |
2505 | { | |
2506 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2507 | "at %C - does not exist.", name); | |
2508 | return MATCH_ERROR; | |
2509 | } | |
2510 | ||
e14bee04 | 2511 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) |
1a9745d2 | 2512 | { |
2513 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2514 | "at %C.", name); | |
2515 | goto next_item; | |
2516 | } | |
2517 | ||
2518 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
2519 | st->n.sym = sym; | |
2520 | sym->refs++; | |
c723595c | 2521 | sym->attr.imported = 1; |
d67fc9ae | 2522 | |
2523 | goto next_item; | |
2524 | ||
2525 | case MATCH_NO: | |
2526 | break; | |
2527 | ||
2528 | case MATCH_ERROR: | |
2529 | return MATCH_ERROR; | |
2530 | } | |
2531 | ||
2532 | next_item: | |
2533 | if (gfc_match_eos () == MATCH_YES) | |
2534 | break; | |
2535 | if (gfc_match_char (',') != MATCH_YES) | |
2536 | goto syntax; | |
2537 | } | |
2538 | ||
2539 | return MATCH_YES; | |
2540 | ||
2541 | syntax: | |
2542 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2543 | return MATCH_ERROR; | |
2544 | } | |
39351103 | 2545 | |
f6d0e37a | 2546 | |
c72e5f7e | 2547 | /* A minimal implementation of gfc_match without whitespace, escape |
2548 | characters or variable arguments. Returns true if the next | |
2549 | characters match the TARGET template exactly. */ | |
2550 | ||
2551 | static bool | |
2552 | match_string_p (const char *target) | |
2553 | { | |
2554 | const char *p; | |
2555 | ||
2556 | for (p = target; *p; p++) | |
2557 | if (gfc_next_char () != *p) | |
2558 | return false; | |
2559 | return true; | |
2560 | } | |
2561 | ||
4ee9c684 | 2562 | /* Matches an attribute specification including array specs. If |
2563 | successful, leaves the variables current_attr and current_as | |
2564 | holding the specification. Also sets the colon_seen variable for | |
2565 | later use by matchers associated with initializations. | |
2566 | ||
2567 | This subroutine is a little tricky in the sense that we don't know | |
2568 | if we really have an attr-spec until we hit the double colon. | |
2569 | Until that time, we can only return MATCH_NO. This forces us to | |
2570 | check for duplicate specification at this level. */ | |
2571 | ||
2572 | static match | |
2573 | match_attr_spec (void) | |
2574 | { | |
4ee9c684 | 2575 | /* Modifiers that can exist in a type statement. */ |
2576 | typedef enum | |
2577 | { GFC_DECL_BEGIN = 0, | |
2578 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
2579 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
3ea52af3 | 2580 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
2581 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
c72e5f7e | 2582 | DECL_IS_BIND_C, DECL_NONE, |
4ee9c684 | 2583 | GFC_DECL_END /* Sentinel */ |
2584 | } | |
2585 | decl_types; | |
2586 | ||
2587 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
2588 | #define NUM_DECL GFC_DECL_END | |
2589 | ||
4ee9c684 | 2590 | locus start, seen_at[NUM_DECL]; |
2591 | int seen[NUM_DECL]; | |
2592 | decl_types d; | |
2593 | const char *attr; | |
2594 | match m; | |
2595 | try t; | |
2596 | ||
2597 | gfc_clear_attr (¤t_attr); | |
cbb9e6aa | 2598 | start = gfc_current_locus; |
4ee9c684 | 2599 | |
2600 | current_as = NULL; | |
2601 | colon_seen = 0; | |
2602 | ||
2603 | /* See if we get all of the keywords up to the final double colon. */ | |
2604 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2605 | seen[d] = 0; | |
2606 | ||
2607 | for (;;) | |
2608 | { | |
c72e5f7e | 2609 | int ch; |
c5d33754 | 2610 | |
c72e5f7e | 2611 | d = DECL_NONE; |
2612 | gfc_gobble_whitespace (); | |
2613 | ||
2614 | ch = gfc_next_char (); | |
2615 | if (ch == ':') | |
2616 | { | |
2617 | /* This is the successful exit condition for the loop. */ | |
2618 | if (gfc_next_char () == ':') | |
2619 | break; | |
2620 | } | |
2621 | else if (ch == ',') | |
c5d33754 | 2622 | { |
c5d33754 | 2623 | gfc_gobble_whitespace (); |
c72e5f7e | 2624 | switch (gfc_peek_char ()) |
c5d33754 | 2625 | { |
c72e5f7e | 2626 | case 'a': |
2627 | if (match_string_p ("allocatable")) | |
2628 | d = DECL_ALLOCATABLE; | |
2629 | break; | |
2630 | ||
2631 | case 'b': | |
c5d33754 | 2632 | /* Try and match the bind(c). */ |
5cf92482 | 2633 | m = gfc_match_bind_c (NULL); |
2634 | if (m == MATCH_YES) | |
c5d33754 | 2635 | d = DECL_IS_BIND_C; |
5cf92482 | 2636 | else if (m == MATCH_ERROR) |
2637 | goto cleanup; | |
c72e5f7e | 2638 | break; |
2639 | ||
2640 | case 'd': | |
2641 | if (match_string_p ("dimension")) | |
2642 | d = DECL_DIMENSION; | |
2643 | break; | |
2644 | ||
2645 | case 'e': | |
2646 | if (match_string_p ("external")) | |
2647 | d = DECL_EXTERNAL; | |
2648 | break; | |
2649 | ||
2650 | case 'i': | |
2651 | if (match_string_p ("int")) | |
2652 | { | |
2653 | ch = gfc_next_char (); | |
2654 | if (ch == 'e') | |
2655 | { | |
2656 | if (match_string_p ("nt")) | |
2657 | { | |
2658 | /* Matched "intent". */ | |
2659 | /* TODO: Call match_intent_spec from here. */ | |
2660 | if (gfc_match (" ( in out )") == MATCH_YES) | |
2661 | d = DECL_INOUT; | |
2662 | else if (gfc_match (" ( in )") == MATCH_YES) | |
2663 | d = DECL_IN; | |
2664 | else if (gfc_match (" ( out )") == MATCH_YES) | |
2665 | d = DECL_OUT; | |
2666 | } | |
2667 | } | |
2668 | else if (ch == 'r') | |
2669 | { | |
2670 | if (match_string_p ("insic")) | |
2671 | { | |
2672 | /* Matched "intrinsic". */ | |
2673 | d = DECL_INTRINSIC; | |
2674 | } | |
2675 | } | |
2676 | } | |
2677 | break; | |
2678 | ||
2679 | case 'o': | |
2680 | if (match_string_p ("optional")) | |
2681 | d = DECL_OPTIONAL; | |
2682 | break; | |
2683 | ||
2684 | case 'p': | |
2685 | gfc_next_char (); | |
2686 | switch (gfc_next_char ()) | |
2687 | { | |
2688 | case 'a': | |
2689 | if (match_string_p ("rameter")) | |
2690 | { | |
2691 | /* Matched "parameter". */ | |
2692 | d = DECL_PARAMETER; | |
2693 | } | |
2694 | break; | |
2695 | ||
2696 | case 'o': | |
2697 | if (match_string_p ("inter")) | |
2698 | { | |
2699 | /* Matched "pointer". */ | |
2700 | d = DECL_POINTER; | |
2701 | } | |
2702 | break; | |
2703 | ||
2704 | case 'r': | |
2705 | ch = gfc_next_char (); | |
2706 | if (ch == 'i') | |
2707 | { | |
2708 | if (match_string_p ("vate")) | |
2709 | { | |
2710 | /* Matched "private". */ | |
2711 | d = DECL_PRIVATE; | |
2712 | } | |
2713 | } | |
2714 | else if (ch == 'o') | |
2715 | { | |
2716 | if (match_string_p ("tected")) | |
2717 | { | |
2718 | /* Matched "protected". */ | |
2719 | d = DECL_PROTECTED; | |
2720 | } | |
2721 | } | |
2722 | break; | |
2723 | ||
2724 | case 'u': | |
2725 | if (match_string_p ("blic")) | |
2726 | { | |
2727 | /* Matched "public". */ | |
2728 | d = DECL_PUBLIC; | |
2729 | } | |
2730 | break; | |
2731 | } | |
2732 | break; | |
2733 | ||
2734 | case 's': | |
2735 | if (match_string_p ("save")) | |
2736 | d = DECL_SAVE; | |
2737 | break; | |
2738 | ||
2739 | case 't': | |
2740 | if (match_string_p ("target")) | |
2741 | d = DECL_TARGET; | |
2742 | break; | |
2743 | ||
2744 | case 'v': | |
2745 | gfc_next_char (); | |
2746 | ch = gfc_next_char (); | |
2747 | if (ch == 'a') | |
2748 | { | |
2749 | if (match_string_p ("lue")) | |
2750 | { | |
2751 | /* Matched "value". */ | |
2752 | d = DECL_VALUE; | |
2753 | } | |
2754 | } | |
2755 | else if (ch == 'o') | |
2756 | { | |
2757 | if (match_string_p ("latile")) | |
2758 | { | |
2759 | /* Matched "volatile". */ | |
2760 | d = DECL_VOLATILE; | |
2761 | } | |
2762 | } | |
2763 | break; | |
c5d33754 | 2764 | } |
2765 | } | |
f3f9b222 | 2766 | |
c72e5f7e | 2767 | /* No double colon and no recognizable decl_type, so assume that |
2768 | we've been looking at something else the whole time. */ | |
2769 | if (d == DECL_NONE) | |
2770 | { | |
2771 | m = MATCH_NO; | |
2772 | goto cleanup; | |
2773 | } | |
e14bee04 | 2774 | |
4ee9c684 | 2775 | seen[d]++; |
cbb9e6aa | 2776 | seen_at[d] = gfc_current_locus; |
4ee9c684 | 2777 | |
2778 | if (d == DECL_DIMENSION) | |
2779 | { | |
2780 | m = gfc_match_array_spec (¤t_as); | |
2781 | ||
2782 | if (m == MATCH_NO) | |
2783 | { | |
2784 | gfc_error ("Missing dimension specification at %C"); | |
2785 | m = MATCH_ERROR; | |
2786 | } | |
2787 | ||
2788 | if (m == MATCH_ERROR) | |
2789 | goto cleanup; | |
2790 | } | |
2791 | } | |
2792 | ||
4ee9c684 | 2793 | /* Since we've seen a double colon, we have to be looking at an |
2794 | attr-spec. This means that we can now issue errors. */ | |
2795 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2796 | if (seen[d] > 1) | |
2797 | { | |
2798 | switch (d) | |
2799 | { | |
2800 | case DECL_ALLOCATABLE: | |
2801 | attr = "ALLOCATABLE"; | |
2802 | break; | |
2803 | case DECL_DIMENSION: | |
2804 | attr = "DIMENSION"; | |
2805 | break; | |
2806 | case DECL_EXTERNAL: | |
2807 | attr = "EXTERNAL"; | |
2808 | break; | |
2809 | case DECL_IN: | |
2810 | attr = "INTENT (IN)"; | |
2811 | break; | |
2812 | case DECL_OUT: | |
2813 | attr = "INTENT (OUT)"; | |
2814 | break; | |
2815 | case DECL_INOUT: | |
2816 | attr = "INTENT (IN OUT)"; | |
2817 | break; | |
2818 | case DECL_INTRINSIC: | |
2819 | attr = "INTRINSIC"; | |
2820 | break; | |
2821 | case DECL_OPTIONAL: | |
2822 | attr = "OPTIONAL"; | |
2823 | break; | |
2824 | case DECL_PARAMETER: | |
2825 | attr = "PARAMETER"; | |
2826 | break; | |
2827 | case DECL_POINTER: | |
2828 | attr = "POINTER"; | |
2829 | break; | |
3ea52af3 | 2830 | case DECL_PROTECTED: |
2831 | attr = "PROTECTED"; | |
2832 | break; | |
4ee9c684 | 2833 | case DECL_PRIVATE: |
2834 | attr = "PRIVATE"; | |
2835 | break; | |
2836 | case DECL_PUBLIC: | |
2837 | attr = "PUBLIC"; | |
2838 | break; | |
2839 | case DECL_SAVE: | |
2840 | attr = "SAVE"; | |
2841 | break; | |
2842 | case DECL_TARGET: | |
2843 | attr = "TARGET"; | |
2844 | break; | |
c5d33754 | 2845 | case DECL_IS_BIND_C: |
2846 | attr = "IS_BIND_C"; | |
2847 | break; | |
2848 | case DECL_VALUE: | |
2849 | attr = "VALUE"; | |
2850 | break; | |
ef814c81 | 2851 | case DECL_VOLATILE: |
2852 | attr = "VOLATILE"; | |
2853 | break; | |
4ee9c684 | 2854 | default: |
f6d0e37a | 2855 | attr = NULL; /* This shouldn't happen. */ |
4ee9c684 | 2856 | } |
2857 | ||
2858 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
2859 | m = MATCH_ERROR; | |
2860 | goto cleanup; | |
2861 | } | |
2862 | ||
2863 | /* Now that we've dealt with duplicate attributes, add the attributes | |
2864 | to the current attribute. */ | |
2865 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2866 | { | |
2867 | if (seen[d] == 0) | |
2868 | continue; | |
2869 | ||
2870 | if (gfc_current_state () == COMP_DERIVED | |
2871 | && d != DECL_DIMENSION && d != DECL_POINTER | |
c72e5f7e | 2872 | && d != DECL_PRIVATE && d != DECL_PUBLIC |
2873 | && d != DECL_NONE) | |
4ee9c684 | 2874 | { |
2294b616 | 2875 | if (d == DECL_ALLOCATABLE) |
2876 | { | |
1a9745d2 | 2877 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
2878 | "attribute at %C in a TYPE definition") | |
e14bee04 | 2879 | == FAILURE) |
2294b616 | 2880 | { |
2881 | m = MATCH_ERROR; | |
2882 | goto cleanup; | |
2883 | } | |
1a9745d2 | 2884 | } |
2885 | else | |
2294b616 | 2886 | { |
2887 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
e14bee04 | 2888 | &seen_at[d]); |
2294b616 | 2889 | m = MATCH_ERROR; |
2890 | goto cleanup; | |
2891 | } | |
4ee9c684 | 2892 | } |
2893 | ||
ea13b9b7 | 2894 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
1a9745d2 | 2895 | && gfc_current_state () != COMP_MODULE) |
ea13b9b7 | 2896 | { |
2897 | if (d == DECL_PRIVATE) | |
2898 | attr = "PRIVATE"; | |
2899 | else | |
2900 | attr = "PUBLIC"; | |
e14bee04 | 2901 | if (gfc_current_state () == COMP_DERIVED |
2902 | && gfc_state_stack->previous | |
2903 | && gfc_state_stack->previous->state == COMP_MODULE) | |
2904 | { | |
2905 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s " | |
2906 | "at %L in a TYPE definition", attr, | |
2907 | &seen_at[d]) | |
2908 | == FAILURE) | |
2909 | { | |
2910 | m = MATCH_ERROR; | |
2911 | goto cleanup; | |
2912 | } | |
2913 | } | |
2914 | else | |
2915 | { | |
2916 | gfc_error ("%s attribute at %L is not allowed outside of the " | |
2917 | "specification part of a module", attr, &seen_at[d]); | |
2918 | m = MATCH_ERROR; | |
2919 | goto cleanup; | |
2920 | } | |
ea13b9b7 | 2921 | } |
2922 | ||
4ee9c684 | 2923 | switch (d) |
2924 | { | |
2925 | case DECL_ALLOCATABLE: | |
2926 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
2927 | break; | |
2928 | ||
2929 | case DECL_DIMENSION: | |
950683ed | 2930 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 2931 | break; |
2932 | ||
2933 | case DECL_EXTERNAL: | |
2934 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
2935 | break; | |
2936 | ||
2937 | case DECL_IN: | |
2938 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
2939 | break; | |
2940 | ||
2941 | case DECL_OUT: | |
2942 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
2943 | break; | |
2944 | ||
2945 | case DECL_INOUT: | |
2946 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
2947 | break; | |
2948 | ||
2949 | case DECL_INTRINSIC: | |
2950 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
2951 | break; | |
2952 | ||
2953 | case DECL_OPTIONAL: | |
2954 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
2955 | break; | |
2956 | ||
2957 | case DECL_PARAMETER: | |
950683ed | 2958 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
4ee9c684 | 2959 | break; |
2960 | ||
2961 | case DECL_POINTER: | |
2962 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
2963 | break; | |
2964 | ||
3ea52af3 | 2965 | case DECL_PROTECTED: |
2966 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
2967 | { | |
2968 | gfc_error ("PROTECTED at %C only allowed in specification " | |
2969 | "part of a module"); | |
2970 | t = FAILURE; | |
2971 | break; | |
2972 | } | |
2973 | ||
1a9745d2 | 2974 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
2975 | "attribute at %C") | |
3ea52af3 | 2976 | == FAILURE) |
2977 | t = FAILURE; | |
2978 | else | |
2979 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
2980 | break; | |
2981 | ||
4ee9c684 | 2982 | case DECL_PRIVATE: |
950683ed | 2983 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
2984 | &seen_at[d]); | |
4ee9c684 | 2985 | break; |
2986 | ||
2987 | case DECL_PUBLIC: | |
950683ed | 2988 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
2989 | &seen_at[d]); | |
4ee9c684 | 2990 | break; |
2991 | ||
2992 | case DECL_SAVE: | |
950683ed | 2993 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 2994 | break; |
2995 | ||
2996 | case DECL_TARGET: | |
2997 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
2998 | break; | |
2999 | ||
c5d33754 | 3000 | case DECL_IS_BIND_C: |
3001 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); | |
3002 | break; | |
3003 | ||
8f6339b6 | 3004 | case DECL_VALUE: |
1a9745d2 | 3005 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
3006 | "at %C") | |
8f6339b6 | 3007 | == FAILURE) |
3008 | t = FAILURE; | |
3009 | else | |
3010 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
3011 | break; | |
3012 | ||
ef814c81 | 3013 | case DECL_VOLATILE: |
3014 | if (gfc_notify_std (GFC_STD_F2003, | |
1a9745d2 | 3015 | "Fortran 2003: VOLATILE attribute at %C") |
ef814c81 | 3016 | == FAILURE) |
3017 | t = FAILURE; | |
3018 | else | |
3019 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
3020 | break; | |
3021 | ||
4ee9c684 | 3022 | default: |
3023 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
3024 | } | |
3025 | ||
3026 | if (t == FAILURE) | |
3027 | { | |
3028 | m = MATCH_ERROR; | |
3029 | goto cleanup; | |
3030 | } | |
3031 | } | |
3032 | ||
3033 | colon_seen = 1; | |
3034 | return MATCH_YES; | |
3035 | ||
3036 | cleanup: | |
cbb9e6aa | 3037 | gfc_current_locus = start; |
4ee9c684 | 3038 | gfc_free_array_spec (current_as); |
3039 | current_as = NULL; | |
3040 | return m; | |
3041 | } | |
3042 | ||
3043 | ||
c5d33754 | 3044 | /* Set the binding label, dest_label, either with the binding label |
3045 | stored in the given gfc_typespec, ts, or if none was provided, it | |
3046 | will be the symbol name in all lower case, as required by the draft | |
3047 | (J3/04-007, section 15.4.1). If a binding label was given and | |
3048 | there is more than one argument (num_idents), it is an error. */ | |
3049 | ||
3050 | try | |
3051 | set_binding_label (char *dest_label, const char *sym_name, int num_idents) | |
3052 | { | |
825718f9 | 3053 | if (num_idents > 1 && has_name_equals) |
c5d33754 | 3054 | { |
825718f9 | 3055 | gfc_error ("Multiple identifiers provided with " |
3056 | "single NAME= specifier at %C"); | |
3057 | return FAILURE; | |
3058 | } | |
c5d33754 | 3059 | |
825718f9 | 3060 | if (curr_binding_label[0] != '\0') |
3061 | { | |
c5d33754 | 3062 | /* Binding label given; store in temp holder til have sym. */ |
3063 | strncpy (dest_label, curr_binding_label, | |
3064 | strlen (curr_binding_label) + 1); | |
3065 | } | |
3066 | else | |
3067 | { | |
3068 | /* No binding label given, and the NAME= specifier did not exist, | |
3069 | which means there was no NAME="". */ | |
3070 | if (sym_name != NULL && has_name_equals == 0) | |
3071 | strncpy (dest_label, sym_name, strlen (sym_name) + 1); | |
3072 | } | |
3073 | ||
3074 | return SUCCESS; | |
3075 | } | |
3076 | ||
3077 | ||
3078 | /* Set the status of the given common block as being BIND(C) or not, | |
3079 | depending on the given parameter, is_bind_c. */ | |
3080 | ||
3081 | void | |
3082 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) | |
3083 | { | |
3084 | com_block->is_bind_c = is_bind_c; | |
3085 | return; | |
3086 | } | |
3087 | ||
3088 | ||
3089 | /* Verify that the given gfc_typespec is for a C interoperable type. */ | |
3090 | ||
3091 | try | |
3092 | verify_c_interop (gfc_typespec *ts, const char *name, locus *where) | |
3093 | { | |
3094 | try t; | |
3095 | ||
3096 | /* Make sure the kind used is appropriate for the type. | |
3097 | The f90_type is unknown if an integer constant was | |
3098 | used (e.g., real(4), bind(c) :: myFloat). */ | |
3099 | if (ts->f90_type != BT_UNKNOWN) | |
3100 | { | |
3101 | t = gfc_validate_c_kind (ts); | |
3102 | if (t != SUCCESS) | |
3103 | { | |
3104 | /* Print an error, but continue parsing line. */ | |
3105 | gfc_error_now ("C kind parameter is for type %s but " | |
3106 | "symbol '%s' at %L is of type %s", | |
3107 | gfc_basic_typename (ts->f90_type), | |
3108 | name, where, | |
3109 | gfc_basic_typename (ts->type)); | |
3110 | } | |
3111 | } | |
3112 | ||
3113 | /* Make sure the kind is C interoperable. This does not care about the | |
3114 | possible error above. */ | |
3115 | if (ts->type == BT_DERIVED && ts->derived != NULL) | |
3116 | return (ts->derived->ts.is_c_interop ? SUCCESS : FAILURE); | |
3117 | else if (ts->is_c_interop != 1) | |
3118 | return FAILURE; | |
3119 | ||
3120 | return SUCCESS; | |
3121 | } | |
3122 | ||
3123 | ||
3124 | /* Verify that the variables of a given common block, which has been | |
3125 | defined with the attribute specifier bind(c), to be of a C | |
3126 | interoperable type. Errors will be reported here, if | |
3127 | encountered. */ | |
3128 | ||
3129 | try | |
3130 | verify_com_block_vars_c_interop (gfc_common_head *com_block) | |
3131 | { | |
3132 | gfc_symbol *curr_sym = NULL; | |
3133 | try retval = SUCCESS; | |
3134 | ||
3135 | curr_sym = com_block->head; | |
3136 | ||
3137 | /* Make sure we have at least one symbol. */ | |
3138 | if (curr_sym == NULL) | |
3139 | return retval; | |
3140 | ||
3141 | /* Here we know we have a symbol, so we'll execute this loop | |
3142 | at least once. */ | |
3143 | do | |
3144 | { | |
3145 | /* The second to last param, 1, says this is in a common block. */ | |
3146 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); | |
3147 | curr_sym = curr_sym->common_next; | |
3148 | } while (curr_sym != NULL); | |
3149 | ||
3150 | return retval; | |
3151 | } | |
3152 | ||
3153 | ||
3154 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, | |
3155 | an appropriate error message is reported. */ | |
3156 | ||
3157 | try | |
3158 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, | |
3159 | int is_in_common, gfc_common_head *com_block) | |
3160 | { | |
3161 | try retval = SUCCESS; | |
4f7bb9ec | 3162 | |
3163 | if (tmp_sym->attr.function && tmp_sym->result != NULL) | |
3164 | { | |
3165 | tmp_sym = tmp_sym->result; | |
3166 | /* Make sure it wasn't an implicitly typed result. */ | |
3167 | if (tmp_sym->attr.implicit_type) | |
3168 | { | |
3169 | gfc_warning ("Implicitly declared BIND(C) function '%s' at " | |
3170 | "%L may not be C interoperable", tmp_sym->name, | |
3171 | &tmp_sym->declared_at); | |
3172 | tmp_sym->ts.f90_type = tmp_sym->ts.type; | |
3173 | /* Mark it as C interoperable to prevent duplicate warnings. */ | |
3174 | tmp_sym->ts.is_c_interop = 1; | |
3175 | tmp_sym->attr.is_c_interop = 1; | |
3176 | } | |
3177 | } | |
c5d33754 | 3178 | |
3179 | /* Here, we know we have the bind(c) attribute, so if we have | |
3180 | enough type info, then verify that it's a C interop kind. | |
3181 | The info could be in the symbol already, or possibly still in | |
3182 | the given ts (current_ts), so look in both. */ | |
3183 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) | |
3184 | { | |
3185 | if (verify_c_interop (&(tmp_sym->ts), tmp_sym->name, | |
3186 | &(tmp_sym->declared_at)) != SUCCESS) | |
3187 | { | |
3188 | /* See if we're dealing with a sym in a common block or not. */ | |
3189 | if (is_in_common == 1) | |
3190 | { | |
3191 | gfc_warning ("Variable '%s' in common block '%s' at %L " | |
3192 | "may not be a C interoperable " | |
3193 | "kind though common block '%s' is BIND(C)", | |
3194 | tmp_sym->name, com_block->name, | |
3195 | &(tmp_sym->declared_at), com_block->name); | |
3196 | } | |
3197 | else | |
3198 | { | |
3199 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) | |
3200 | gfc_error ("Type declaration '%s' at %L is not C " | |
3201 | "interoperable but it is BIND(C)", | |
3202 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3203 | else | |
3204 | gfc_warning ("Variable '%s' at %L " | |
3205 | "may not be a C interoperable " | |
3206 | "kind but it is bind(c)", | |
3207 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3208 | } | |
3209 | } | |
3210 | ||
3211 | /* Variables declared w/in a common block can't be bind(c) | |
3212 | since there's no way for C to see these variables, so there's | |
3213 | semantically no reason for the attribute. */ | |
3214 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) | |
3215 | { | |
3216 | gfc_error ("Variable '%s' in common block '%s' at " | |
3217 | "%L cannot be declared with BIND(C) " | |
3218 | "since it is not a global", | |
3219 | tmp_sym->name, com_block->name, | |
3220 | &(tmp_sym->declared_at)); | |
3221 | retval = FAILURE; | |
3222 | } | |
3223 | ||
3224 | /* Scalar variables that are bind(c) can not have the pointer | |
3225 | or allocatable attributes. */ | |
3226 | if (tmp_sym->attr.is_bind_c == 1) | |
3227 | { | |
3228 | if (tmp_sym->attr.pointer == 1) | |
3229 | { | |
3230 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3231 | "POINTER and BIND(C) attributes", | |
3232 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3233 | retval = FAILURE; | |
3234 | } | |
3235 | ||
3236 | if (tmp_sym->attr.allocatable == 1) | |
3237 | { | |
3238 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3239 | "ALLOCATABLE and BIND(C) attributes", | |
3240 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3241 | retval = FAILURE; | |
3242 | } | |
3243 | ||
3244 | /* If it is a BIND(C) function, make sure the return value is a | |
3245 | scalar value. The previous tests in this function made sure | |
3246 | the type is interoperable. */ | |
3247 | if (tmp_sym->attr.function == 1 && tmp_sym->as != NULL) | |
3248 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3249 | "be an array", tmp_sym->name, &(tmp_sym->declared_at)); | |
3250 | ||
3251 | /* BIND(C) functions can not return a character string. */ | |
3252 | if (tmp_sym->attr.function == 1 && tmp_sym->ts.type == BT_CHARACTER) | |
3253 | if (tmp_sym->ts.cl == NULL || tmp_sym->ts.cl->length == NULL | |
3254 | || tmp_sym->ts.cl->length->expr_type != EXPR_CONSTANT | |
3255 | || mpz_cmp_si (tmp_sym->ts.cl->length->value.integer, 1) != 0) | |
3256 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3257 | "be a character string", tmp_sym->name, | |
3258 | &(tmp_sym->declared_at)); | |
3259 | } | |
3260 | } | |
3261 | ||
3262 | /* See if the symbol has been marked as private. If it has, make sure | |
3263 | there is no binding label and warn the user if there is one. */ | |
3264 | if (tmp_sym->attr.access == ACCESS_PRIVATE | |
3265 | && tmp_sym->binding_label[0] != '\0') | |
3266 | /* Use gfc_warning_now because we won't say that the symbol fails | |
3267 | just because of this. */ | |
3268 | gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " | |
3269 | "given the binding label '%s'", tmp_sym->name, | |
3270 | &(tmp_sym->declared_at), tmp_sym->binding_label); | |
3271 | ||
3272 | return retval; | |
3273 | } | |
3274 | ||
3275 | ||
3276 | /* Set the appropriate fields for a symbol that's been declared as | |
3277 | BIND(C) (the is_bind_c flag and the binding label), and verify that | |
3278 | the type is C interoperable. Errors are reported by the functions | |
3279 | used to set/test these fields. */ | |
3280 | ||
3281 | try | |
3282 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) | |
3283 | { | |
3284 | try retval = SUCCESS; | |
3285 | ||
3286 | /* TODO: Do we need to make sure the vars aren't marked private? */ | |
3287 | ||
3288 | /* Set the is_bind_c bit in symbol_attribute. */ | |
3289 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); | |
3290 | ||
3291 | if (set_binding_label (tmp_sym->binding_label, tmp_sym->name, | |
3292 | num_idents) != SUCCESS) | |
3293 | return FAILURE; | |
3294 | ||
3295 | return retval; | |
3296 | } | |
3297 | ||
3298 | ||
3299 | /* Set the fields marking the given common block as BIND(C), including | |
3300 | a binding label, and report any errors encountered. */ | |
3301 | ||
3302 | try | |
3303 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) | |
3304 | { | |
3305 | try retval = SUCCESS; | |
3306 | ||
3307 | /* destLabel, common name, typespec (which may have binding label). */ | |
3308 | if (set_binding_label (com_block->binding_label, com_block->name, num_idents) | |
3309 | != SUCCESS) | |
3310 | return FAILURE; | |
3311 | ||
3312 | /* Set the given common block (com_block) to being bind(c) (1). */ | |
3313 | set_com_block_bind_c (com_block, 1); | |
3314 | ||
3315 | return retval; | |
3316 | } | |
3317 | ||
3318 | ||
3319 | /* Retrieve the list of one or more identifiers that the given bind(c) | |
3320 | attribute applies to. */ | |
3321 | ||
3322 | try | |
3323 | get_bind_c_idents (void) | |
3324 | { | |
3325 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3326 | int num_idents = 0; | |
3327 | gfc_symbol *tmp_sym = NULL; | |
3328 | match found_id; | |
3329 | gfc_common_head *com_block = NULL; | |
3330 | ||
3331 | if (gfc_match_name (name) == MATCH_YES) | |
3332 | { | |
3333 | found_id = MATCH_YES; | |
3334 | gfc_get_ha_symbol (name, &tmp_sym); | |
3335 | } | |
3336 | else if (match_common_name (name) == MATCH_YES) | |
3337 | { | |
3338 | found_id = MATCH_YES; | |
3339 | com_block = gfc_get_common (name, 0); | |
3340 | } | |
3341 | else | |
3342 | { | |
3343 | gfc_error ("Need either entity or common block name for " | |
3344 | "attribute specification statement at %C"); | |
3345 | return FAILURE; | |
3346 | } | |
3347 | ||
3348 | /* Save the current identifier and look for more. */ | |
3349 | do | |
3350 | { | |
3351 | /* Increment the number of identifiers found for this spec stmt. */ | |
3352 | num_idents++; | |
3353 | ||
3354 | /* Make sure we have a sym or com block, and verify that it can | |
3355 | be bind(c). Set the appropriate field(s) and look for more | |
3356 | identifiers. */ | |
3357 | if (tmp_sym != NULL || com_block != NULL) | |
3358 | { | |
3359 | if (tmp_sym != NULL) | |
3360 | { | |
3361 | if (set_verify_bind_c_sym (tmp_sym, num_idents) | |
3362 | != SUCCESS) | |
3363 | return FAILURE; | |
3364 | } | |
3365 | else | |
3366 | { | |
3367 | if (set_verify_bind_c_com_block(com_block, num_idents) | |
3368 | != SUCCESS) | |
3369 | return FAILURE; | |
3370 | } | |
3371 | ||
3372 | /* Look to see if we have another identifier. */ | |
3373 | tmp_sym = NULL; | |
3374 | if (gfc_match_eos () == MATCH_YES) | |
3375 | found_id = MATCH_NO; | |
3376 | else if (gfc_match_char (',') != MATCH_YES) | |
3377 | found_id = MATCH_NO; | |
3378 | else if (gfc_match_name (name) == MATCH_YES) | |
3379 | { | |
3380 | found_id = MATCH_YES; | |
3381 | gfc_get_ha_symbol (name, &tmp_sym); | |
3382 | } | |
3383 | else if (match_common_name (name) == MATCH_YES) | |
3384 | { | |
3385 | found_id = MATCH_YES; | |
3386 | com_block = gfc_get_common (name, 0); | |
3387 | } | |
3388 | else | |
3389 | { | |
3390 | gfc_error ("Missing entity or common block name for " | |
3391 | "attribute specification statement at %C"); | |
3392 | return FAILURE; | |
3393 | } | |
3394 | } | |
3395 | else | |
3396 | { | |
3397 | gfc_internal_error ("Missing symbol"); | |
3398 | } | |
3399 | } while (found_id == MATCH_YES); | |
3400 | ||
3401 | /* if we get here we were successful */ | |
3402 | return SUCCESS; | |
3403 | } | |
3404 | ||
3405 | ||
3406 | /* Try and match a BIND(C) attribute specification statement. */ | |
3407 | ||
3408 | match | |
3409 | gfc_match_bind_c_stmt (void) | |
3410 | { | |
3411 | match found_match = MATCH_NO; | |
3412 | gfc_typespec *ts; | |
3413 | ||
3414 | ts = ¤t_ts; | |
3415 | ||
3416 | /* This may not be necessary. */ | |
3417 | gfc_clear_ts (ts); | |
3418 | /* Clear the temporary binding label holder. */ | |
3419 | curr_binding_label[0] = '\0'; | |
3420 | ||
3421 | /* Look for the bind(c). */ | |
3422 | found_match = gfc_match_bind_c (NULL); | |
3423 | ||
3424 | if (found_match == MATCH_YES) | |
3425 | { | |
3426 | /* Look for the :: now, but it is not required. */ | |
3427 | gfc_match (" :: "); | |
3428 | ||
3429 | /* Get the identifier(s) that needs to be updated. This may need to | |
3430 | change to hand the flag(s) for the attr specified so all identifiers | |
3431 | found can have all appropriate parts updated (assuming that the same | |
3432 | spec stmt can have multiple attrs, such as both bind(c) and | |
3433 | allocatable...). */ | |
3434 | if (get_bind_c_idents () != SUCCESS) | |
3435 | /* Error message should have printed already. */ | |
3436 | return MATCH_ERROR; | |
3437 | } | |
3438 | ||
3439 | return found_match; | |
3440 | } | |
3441 | ||
3442 | ||
4ee9c684 | 3443 | /* Match a data declaration statement. */ |
3444 | ||
3445 | match | |
3446 | gfc_match_data_decl (void) | |
3447 | { | |
3448 | gfc_symbol *sym; | |
3449 | match m; | |
3923b69f | 3450 | int elem; |
4ee9c684 | 3451 | |
c5d33754 | 3452 | num_idents_on_line = 0; |
3453 | ||
67a51c8e | 3454 | m = gfc_match_type_spec (¤t_ts, 0); |
4ee9c684 | 3455 | if (m != MATCH_YES) |
3456 | return m; | |
3457 | ||
3458 | if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) | |
3459 | { | |
3460 | sym = gfc_use_derived (current_ts.derived); | |
3461 | ||
3462 | if (sym == NULL) | |
3463 | { | |
3464 | m = MATCH_ERROR; | |
3465 | goto cleanup; | |
3466 | } | |
3467 | ||
3468 | current_ts.derived = sym; | |
3469 | } | |
3470 | ||
3471 | m = match_attr_spec (); | |
3472 | if (m == MATCH_ERROR) | |
3473 | { | |
3474 | m = MATCH_NO; | |
3475 | goto cleanup; | |
3476 | } | |
3477 | ||
e6b82afc | 3478 | if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL |
3479 | && !current_ts.derived->attr.zero_comp) | |
4ee9c684 | 3480 | { |
3481 | ||
3482 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
3483 | goto ok; | |
3484 | ||
40cf8078 | 3485 | gfc_find_symbol (current_ts.derived->name, |
1a9745d2 | 3486 | current_ts.derived->ns->parent, 1, &sym); |
4ee9c684 | 3487 | |
40cf8078 | 3488 | /* Any symbol that we find had better be a type definition |
1a9745d2 | 3489 | which has its components defined. */ |
40cf8078 | 3490 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
e6b82afc | 3491 | && (current_ts.derived->components != NULL |
3492 | || current_ts.derived->attr.zero_comp)) | |
4ee9c684 | 3493 | goto ok; |
3494 | ||
40cf8078 | 3495 | /* Now we have an error, which we signal, and then fix up |
3496 | because the knock-on is plain and simple confusing. */ | |
3497 | gfc_error_now ("Derived type at %C has not been previously defined " | |
1a9745d2 | 3498 | "and so cannot appear in a derived type definition"); |
40cf8078 | 3499 | current_attr.pointer = 1; |
3500 | goto ok; | |
4ee9c684 | 3501 | } |
3502 | ||
3503 | ok: | |
3504 | /* If we have an old-style character declaration, and no new-style | |
3505 | attribute specifications, then there a comma is optional between | |
3506 | the type specification and the variable list. */ | |
3507 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
3508 | gfc_match_char (','); | |
3509 | ||
3923b69f | 3510 | /* Give the types/attributes to symbols that follow. Give the element |
3511 | a number so that repeat character length expressions can be copied. */ | |
3512 | elem = 1; | |
4ee9c684 | 3513 | for (;;) |
3514 | { | |
c5d33754 | 3515 | num_idents_on_line++; |
3923b69f | 3516 | m = variable_decl (elem++); |
4ee9c684 | 3517 | if (m == MATCH_ERROR) |
3518 | goto cleanup; | |
3519 | if (m == MATCH_NO) | |
3520 | break; | |
3521 | ||
3522 | if (gfc_match_eos () == MATCH_YES) | |
3523 | goto cleanup; | |
3524 | if (gfc_match_char (',') != MATCH_YES) | |
3525 | break; | |
3526 | } | |
3527 | ||
8f0bdb23 | 3528 | if (gfc_error_flag_test () == 0) |
3529 | gfc_error ("Syntax error in data declaration at %C"); | |
4ee9c684 | 3530 | m = MATCH_ERROR; |
3531 | ||
af29c1f0 | 3532 | gfc_free_data_all (gfc_current_ns); |
3533 | ||
4ee9c684 | 3534 | cleanup: |
3535 | gfc_free_array_spec (current_as); | |
3536 | current_as = NULL; | |
3537 | return m; | |
3538 | } | |
3539 | ||
3540 | ||
3541 | /* Match a prefix associated with a function or subroutine | |
3542 | declaration. If the typespec pointer is nonnull, then a typespec | |
3543 | can be matched. Note that if nothing matches, MATCH_YES is | |
3544 | returned (the null string was matched). */ | |
3545 | ||
3546 | static match | |
1a9745d2 | 3547 | match_prefix (gfc_typespec *ts) |
4ee9c684 | 3548 | { |
3549 | int seen_type; | |
3550 | ||
3551 | gfc_clear_attr (¤t_attr); | |
3552 | seen_type = 0; | |
3553 | ||
3554 | loop: | |
3555 | if (!seen_type && ts != NULL | |
67a51c8e | 3556 | && gfc_match_type_spec (ts, 0) == MATCH_YES |
4ee9c684 | 3557 | && gfc_match_space () == MATCH_YES) |
3558 | { | |
3559 | ||
3560 | seen_type = 1; | |
3561 | goto loop; | |
3562 | } | |
3563 | ||
3564 | if (gfc_match ("elemental% ") == MATCH_YES) | |
3565 | { | |
3566 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
3567 | return MATCH_ERROR; | |
3568 | ||
3569 | goto loop; | |
3570 | } | |
3571 | ||
3572 | if (gfc_match ("pure% ") == MATCH_YES) | |
3573 | { | |
3574 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
3575 | return MATCH_ERROR; | |
3576 | ||
3577 | goto loop; | |
3578 | } | |
3579 | ||
3580 | if (gfc_match ("recursive% ") == MATCH_YES) | |
3581 | { | |
3582 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
3583 | return MATCH_ERROR; | |
3584 | ||
3585 | goto loop; | |
3586 | } | |
3587 | ||
3588 | /* At this point, the next item is not a prefix. */ | |
3589 | return MATCH_YES; | |
3590 | } | |
3591 | ||
3592 | ||
3593 | /* Copy attributes matched by match_prefix() to attributes on a symbol. */ | |
3594 | ||
3595 | static try | |
1a9745d2 | 3596 | copy_prefix (symbol_attribute *dest, locus *where) |
4ee9c684 | 3597 | { |
4ee9c684 | 3598 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
3599 | return FAILURE; | |
3600 | ||
3601 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
3602 | return FAILURE; | |
3603 | ||
3604 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
3605 | return FAILURE; | |
3606 | ||
3607 | return SUCCESS; | |
3608 | } | |
3609 | ||
3610 | ||
3611 | /* Match a formal argument list. */ | |
3612 | ||
3613 | match | |
1a9745d2 | 3614 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
4ee9c684 | 3615 | { |
3616 | gfc_formal_arglist *head, *tail, *p, *q; | |
3617 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3618 | gfc_symbol *sym; | |
3619 | match m; | |
3620 | ||
3621 | head = tail = NULL; | |
3622 | ||
3623 | if (gfc_match_char ('(') != MATCH_YES) | |
3624 | { | |
3625 | if (null_flag) | |
3626 | goto ok; | |
3627 | return MATCH_NO; | |
3628 | } | |
3629 | ||
3630 | if (gfc_match_char (')') == MATCH_YES) | |
3631 | goto ok; | |
3632 | ||
3633 | for (;;) | |
3634 | { | |
3635 | if (gfc_match_char ('*') == MATCH_YES) | |
3636 | sym = NULL; | |
3637 | else | |
3638 | { | |
3639 | m = gfc_match_name (name); | |
3640 | if (m != MATCH_YES) | |
3641 | goto cleanup; | |
3642 | ||
3643 | if (gfc_get_symbol (name, NULL, &sym)) | |
3644 | goto cleanup; | |
3645 | } | |
3646 | ||
3647 | p = gfc_get_formal_arglist (); | |
3648 | ||
3649 | if (head == NULL) | |
3650 | head = tail = p; | |
3651 | else | |
3652 | { | |
3653 | tail->next = p; | |
3654 | tail = p; | |
3655 | } | |
3656 | ||
3657 | tail->sym = sym; | |
3658 | ||
3659 | /* We don't add the VARIABLE flavor because the name could be a | |
1a9745d2 | 3660 | dummy procedure. We don't apply these attributes to formal |
3661 | arguments of statement functions. */ | |
4ee9c684 | 3662 | if (sym != NULL && !st_flag |
950683ed | 3663 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
4ee9c684 | 3664 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
3665 | { | |
3666 | m = MATCH_ERROR; | |
3667 | goto cleanup; | |
3668 | } | |
3669 | ||
3670 | /* The name of a program unit can be in a different namespace, | |
1a9745d2 | 3671 | so check for it explicitly. After the statement is accepted, |
3672 | the name is checked for especially in gfc_get_symbol(). */ | |
4ee9c684 | 3673 | if (gfc_new_block != NULL && sym != NULL |
3674 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
3675 | { | |
3676 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
3677 | sym->name); | |
3678 | m = MATCH_ERROR; | |
3679 | goto cleanup; | |
3680 | } | |
3681 | ||
3682 | if (gfc_match_char (')') == MATCH_YES) | |
3683 | goto ok; | |
3684 | ||
3685 | m = gfc_match_char (','); | |
3686 | if (m != MATCH_YES) | |
3687 | { | |
3688 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
3689 | goto cleanup; | |
3690 | } | |
3691 | } | |
3692 | ||
3693 | ok: | |
3694 | /* Check for duplicate symbols in the formal argument list. */ | |
3695 | if (head != NULL) | |
3696 | { | |
3697 | for (p = head; p->next; p = p->next) | |
3698 | { | |
3699 | if (p->sym == NULL) | |
3700 | continue; | |
3701 | ||
3702 | for (q = p->next; q; q = q->next) | |
3703 | if (p->sym == q->sym) | |
3704 | { | |
1a9745d2 | 3705 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
3706 | "at %C", p->sym->name); | |
4ee9c684 | 3707 | |
3708 | m = MATCH_ERROR; | |
3709 | goto cleanup; | |
3710 | } | |
3711 | } | |
3712 | } | |
3713 | ||
f6d0e37a | 3714 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) |
3715 | == FAILURE) | |
4ee9c684 | 3716 | { |
3717 | m = MATCH_ERROR; | |
3718 | goto cleanup; | |
3719 | } | |
3720 | ||
3721 | return MATCH_YES; | |
3722 | ||
3723 | cleanup: | |
3724 | gfc_free_formal_arglist (head); | |
3725 | return m; | |
3726 | } | |
3727 | ||
3728 | ||
3729 | /* Match a RESULT specification following a function declaration or | |
3730 | ENTRY statement. Also matches the end-of-statement. */ | |
3731 | ||
3732 | static match | |
f6d0e37a | 3733 | match_result (gfc_symbol *function, gfc_symbol **result) |
4ee9c684 | 3734 | { |
3735 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3736 | gfc_symbol *r; | |
3737 | match m; | |
3738 | ||
3739 | if (gfc_match (" result (") != MATCH_YES) | |
3740 | return MATCH_NO; | |
3741 | ||
3742 | m = gfc_match_name (name); | |
3743 | if (m != MATCH_YES) | |
3744 | return m; | |
3745 | ||
c5d33754 | 3746 | /* Get the right paren, and that's it because there could be the |
3747 | bind(c) attribute after the result clause. */ | |
3748 | if (gfc_match_char(')') != MATCH_YES) | |
4ee9c684 | 3749 | { |
c5d33754 | 3750 | /* TODO: should report the missing right paren here. */ |
4ee9c684 | 3751 | return MATCH_ERROR; |
3752 | } | |
3753 | ||
3754 | if (strcmp (function->name, name) == 0) | |
3755 | { | |
1a9745d2 | 3756 | gfc_error ("RESULT variable at %C must be different than function name"); |
4ee9c684 | 3757 | return MATCH_ERROR; |
3758 | } | |
3759 | ||
3760 | if (gfc_get_symbol (name, NULL, &r)) | |
3761 | return MATCH_ERROR; | |
3762 | ||
950683ed | 3763 | if (gfc_add_flavor (&r->attr, FL_VARIABLE, r->name, NULL) == FAILURE |
3764 | || gfc_add_result (&r->attr, r->name, NULL) == FAILURE) | |
4ee9c684 | 3765 | return MATCH_ERROR; |
3766 | ||
3767 | *result = r; | |
3768 | ||
3769 | return MATCH_YES; | |
3770 | } | |
3771 | ||
3772 | ||
c5d33754 | 3773 | /* Match a function suffix, which could be a combination of a result |
3774 | clause and BIND(C), either one, or neither. The draft does not | |
3775 | require them to come in a specific order. */ | |
3776 | ||
3777 | match | |
3778 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) | |
3779 | { | |
3780 | match is_bind_c; /* Found bind(c). */ | |
3781 | match is_result; /* Found result clause. */ | |
3782 | match found_match; /* Status of whether we've found a good match. */ | |
3783 | int peek_char; /* Character we're going to peek at. */ | |
3784 | ||
3785 | /* Initialize to having found nothing. */ | |
3786 | found_match = MATCH_NO; | |
3787 | is_bind_c = MATCH_NO; | |
3788 | is_result = MATCH_NO; | |
3789 | ||
3790 | /* Get the next char to narrow between result and bind(c). */ | |
3791 | gfc_gobble_whitespace (); | |
3792 | peek_char = gfc_peek_char (); | |
3793 | ||
3794 | switch (peek_char) | |
3795 | { | |
3796 | case 'r': | |
3797 | /* Look for result clause. */ | |
3798 | is_result = match_result (sym, result); | |
3799 | if (is_result == MATCH_YES) | |
3800 | { | |
3801 | /* Now see if there is a bind(c) after it. */ | |
3802 | is_bind_c = gfc_match_bind_c (sym); | |
3803 | /* We've found the result clause and possibly bind(c). */ | |
3804 | found_match = MATCH_YES; | |
3805 | } | |
3806 | else | |
3807 | /* This should only be MATCH_ERROR. */ | |
3808 | found_match = is_result; | |
3809 | break; | |
3810 | case 'b': | |
3811 | /* Look for bind(c) first. */ | |
3812 | is_bind_c = gfc_match_bind_c (sym); | |
3813 | if (is_bind_c == MATCH_YES) | |
3814 | { | |
3815 | /* Now see if a result clause followed it. */ | |
3816 | is_result = match_result (sym, result); | |
3817 | found_match = MATCH_YES; | |
3818 | } | |
3819 | else | |
3820 | { | |
3821 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ | |
3822 | found_match = MATCH_ERROR; | |
3823 | } | |
3824 | break; | |
3825 | default: | |
3826 | gfc_error ("Unexpected junk after function declaration at %C"); | |
3827 | found_match = MATCH_ERROR; | |
3828 | break; | |
3829 | } | |
3830 | ||
c5d33754 | 3831 | if (is_bind_c == MATCH_YES) |
3832 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) | |
3833 | == FAILURE) | |
3834 | return MATCH_ERROR; | |
3835 | ||
3836 | return found_match; | |
3837 | } | |
3838 | ||
3839 | ||
af1a34ee | 3840 | /* Match a PROCEDURE declaration (R1211). */ |
3841 | ||
3842 | static match | |
3843 | match_procedure_decl (void) | |
3844 | { | |
3845 | match m; | |
3846 | locus old_loc, entry_loc; | |
3847 | gfc_symbol *sym, *proc_if = NULL; | |
3848 | int num; | |
3849 | ||
3850 | old_loc = entry_loc = gfc_current_locus; | |
3851 | ||
3852 | gfc_clear_ts (¤t_ts); | |
3853 | ||
3854 | if (gfc_match (" (") != MATCH_YES) | |
3855 | { | |
3856 | gfc_current_locus = entry_loc; | |
3857 | return MATCH_NO; | |
3858 | } | |
3859 | ||
3860 | /* Get the type spec. for the procedure interface. */ | |
3861 | old_loc = gfc_current_locus; | |
67a51c8e | 3862 | m = gfc_match_type_spec (¤t_ts, 0); |
af1a34ee | 3863 | if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_char () == ')')) |
3864 | goto got_ts; | |
3865 | ||
3866 | if (m == MATCH_ERROR) | |
3867 | return m; | |
3868 | ||
3869 | gfc_current_locus = old_loc; | |
3870 | ||
3871 | /* Get the name of the procedure or abstract interface | |
3872 | to inherit the interface from. */ | |
3873 | m = gfc_match_symbol (&proc_if, 1); | |
3874 | ||
3875 | if (m == MATCH_NO) | |
3876 | goto syntax; | |
3877 | else if (m == MATCH_ERROR) | |
3878 | return m; | |
3879 | ||
3880 | /* Various interface checks. */ | |
3881 | if (proc_if) | |
3882 | { | |
3883 | if (proc_if->generic) | |
3884 | { | |
3885 | gfc_error ("Interface '%s' at %C may not be generic", proc_if->name); | |
3886 | return MATCH_ERROR; | |
3887 | } | |
3888 | if (proc_if->attr.proc == PROC_ST_FUNCTION) | |
3889 | { | |
3890 | gfc_error ("Interface '%s' at %C may not be a statement function", | |
3891 | proc_if->name); | |
3892 | return MATCH_ERROR; | |
3893 | } | |
3894 | /* Handle intrinsic procedures. */ | |
3895 | if (gfc_intrinsic_name (proc_if->name, 0) | |
3896 | || gfc_intrinsic_name (proc_if->name, 1)) | |
3897 | proc_if->attr.intrinsic = 1; | |
3898 | if (proc_if->attr.intrinsic | |
3899 | && !gfc_intrinsic_actual_ok (proc_if->name, 0)) | |
3900 | { | |
3901 | gfc_error ("Intrinsic procedure '%s' not allowed " | |
3902 | "in PROCEDURE statement at %C", proc_if->name); | |
3903 | return MATCH_ERROR; | |
3904 | } | |
3905 | /* TODO: Allow intrinsics with gfc_intrinsic_actual_ok | |
3906 | (proc_if->name, 0) after PR33162 is fixed. */ | |
3907 | if (proc_if->attr.intrinsic) | |
3908 | { | |
3909 | gfc_error ("Fortran 2003: Support for intrinsic procedure '%s' " | |
3910 | "in PROCEDURE statement at %C not yet implemented " | |
3911 | "in gfortran", proc_if->name); | |
3912 | return MATCH_ERROR; | |
3913 | } | |
3914 | } | |
3915 | ||
3916 | got_ts: | |
3917 | ||
3918 | if (gfc_match (" )") != MATCH_YES) | |
3919 | { | |
3920 | gfc_current_locus = entry_loc; | |
3921 | return MATCH_NO; | |
3922 | } | |
3923 | ||
3924 | /* Parse attributes. */ | |
3925 | m = match_attr_spec(); | |
3926 | if (m == MATCH_ERROR) | |
3927 | return MATCH_ERROR; | |
3928 | ||
3929 | /* Get procedure symbols. */ | |
3930 | for(num=1;;num++) | |
3931 | { | |
3932 | ||
3933 | m = gfc_match_symbol (&sym, 0); | |
3934 | if (m == MATCH_NO) | |
3935 | goto syntax; | |
3936 | else if (m == MATCH_ERROR) | |
3937 | return m; | |
3938 | ||
3939 | /* Add current_attr to the symbol attributes. */ | |
3940 | if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
3941 | return MATCH_ERROR; | |
3942 | ||
3943 | if (sym->attr.is_bind_c) | |
3944 | { | |
3945 | /* Check for C1218. */ | |
3946 | if (!proc_if || !proc_if->attr.is_bind_c) | |
3947 | { | |
3948 | gfc_error ("BIND(C) attribute at %C requires " | |
3949 | "an interface with BIND(C)"); | |
3950 | return MATCH_ERROR; | |
3951 | } | |
3952 | /* Check for C1217. */ | |
3953 | if (has_name_equals && sym->attr.pointer) | |
3954 | { | |
3955 | gfc_error ("BIND(C) procedure with NAME may not have " | |
3956 | "POINTER attribute at %C"); | |
3957 | return MATCH_ERROR; | |
3958 | } | |
3959 | if (has_name_equals && sym->attr.dummy) | |
3960 | { | |
3961 | gfc_error ("Dummy procedure at %C may not have " | |
3962 | "BIND(C) attribute with NAME"); | |
3963 | return MATCH_ERROR; | |
3964 | } | |
3965 | /* Set binding label for BIND(C). */ | |
3966 | if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS) | |
3967 | return MATCH_ERROR; | |
3968 | } | |
3969 | ||
3970 | if (!sym->attr.pointer && gfc_add_external (&sym->attr, NULL) == FAILURE) | |
3971 | return MATCH_ERROR; | |
3972 | if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE) | |
3973 | return MATCH_ERROR; | |
3974 | ||
3975 | /* Set interface. */ | |
3976 | if (proc_if != NULL) | |
3977 | sym->interface = proc_if; | |
3978 | else if (current_ts.type != BT_UNKNOWN) | |
3979 | { | |
3980 | sym->interface = gfc_new_symbol ("", gfc_current_ns); | |
3981 | sym->interface->ts = current_ts; | |
3982 | sym->interface->attr.function = 1; | |
3983 | sym->ts = sym->interface->ts; | |
3984 | sym->attr.function = sym->interface->attr.function; | |
3985 | } | |
3986 | ||
3987 | if (gfc_match_eos () == MATCH_YES) | |
3988 | return MATCH_YES; | |
3989 | if (gfc_match_char (',') != MATCH_YES) | |
3990 | goto syntax; | |
3991 | } | |
3992 | ||
3993 | syntax: | |
3994 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
3995 | return MATCH_ERROR; | |
3996 | } | |
3997 | ||
3998 | ||
3999 | /* Match a PROCEDURE declaration inside an interface (R1206). */ | |
4000 | ||
4001 | static match | |
4002 | match_procedure_in_interface (void) | |
4003 | { | |
4004 | match m; | |
4005 | gfc_symbol *sym; | |
4006 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4007 | ||
4008 | if (current_interface.type == INTERFACE_NAMELESS | |
4009 | || current_interface.type == INTERFACE_ABSTRACT) | |
4010 | { | |
4011 | gfc_error ("PROCEDURE at %C must be in a generic interface"); | |
4012 | return MATCH_ERROR; | |
4013 | } | |
4014 | ||
4015 | for(;;) | |
4016 | { | |
4017 | m = gfc_match_name (name); | |
4018 | if (m == MATCH_NO) | |
4019 | goto syntax; | |
4020 | else if (m == MATCH_ERROR) | |
4021 | return m; | |
4022 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
4023 | return MATCH_ERROR; | |
4024 | ||
4025 | if (gfc_add_interface (sym) == FAILURE) | |
4026 | return MATCH_ERROR; | |
4027 | ||
4028 | sym->attr.procedure = 1; | |
4029 | ||
4030 | if (gfc_match_eos () == MATCH_YES) | |
4031 | break; | |
4032 | if (gfc_match_char (',') != MATCH_YES) | |
4033 | goto syntax; | |
4034 | } | |
4035 | ||
4036 | return MATCH_YES; | |
4037 | ||
4038 | syntax: | |
4039 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4040 | return MATCH_ERROR; | |
4041 | } | |
4042 | ||
4043 | ||
4044 | /* General matcher for PROCEDURE declarations. */ | |
4045 | ||
4046 | match | |
4047 | gfc_match_procedure (void) | |
4048 | { | |
4049 | match m; | |
4050 | ||
4051 | switch (gfc_current_state ()) | |
4052 | { | |
4053 | case COMP_NONE: | |
4054 | case COMP_PROGRAM: | |
4055 | case COMP_MODULE: | |
4056 | case COMP_SUBROUTINE: | |
4057 | case COMP_FUNCTION: | |
4058 | m = match_procedure_decl (); | |
4059 | break; | |
4060 | case COMP_INTERFACE: | |
4061 | m = match_procedure_in_interface (); | |
4062 | break; | |
4063 | case COMP_DERIVED: | |
4064 | gfc_error ("Fortran 2003: Procedure components at %C are " | |
4065 | "not yet implemented in gfortran"); | |
4066 | return MATCH_ERROR; | |
4067 | default: | |
4068 | return MATCH_NO; | |
4069 | } | |
4070 | ||
4071 | if (m != MATCH_YES) | |
4072 | return m; | |
4073 | ||
4074 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C") | |
4075 | == FAILURE) | |
4076 | return MATCH_ERROR; | |
4077 | ||
4078 | return m; | |
4079 | } | |
4080 | ||
4081 | ||
4ee9c684 | 4082 | /* Match a function declaration. */ |
4083 | ||
4084 | match | |
4085 | gfc_match_function_decl (void) | |
4086 | { | |
4087 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4088 | gfc_symbol *sym, *result; | |
4089 | locus old_loc; | |
4090 | match m; | |
c5d33754 | 4091 | match suffix_match; |
4092 | match found_match; /* Status returned by match func. */ | |
4ee9c684 | 4093 | |
4094 | if (gfc_current_state () != COMP_NONE | |
4095 | && gfc_current_state () != COMP_INTERFACE | |
4096 | && gfc_current_state () != COMP_CONTAINS) | |
4097 | return MATCH_NO; | |
4098 | ||
4099 | gfc_clear_ts (¤t_ts); | |
4100 | ||
cbb9e6aa | 4101 | old_loc = gfc_current_locus; |
4ee9c684 | 4102 | |
4103 | m = match_prefix (¤t_ts); | |
4104 | if (m != MATCH_YES) | |
4105 | { | |
cbb9e6aa | 4106 | gfc_current_locus = old_loc; |
4ee9c684 | 4107 | return m; |
4108 | } | |
4109 | ||
4110 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
4111 | { | |
cbb9e6aa | 4112 | gfc_current_locus = old_loc; |
4ee9c684 | 4113 | return MATCH_NO; |
4114 | } | |
d77f260f | 4115 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 4116 | return MATCH_ERROR; |
4117 | gfc_new_block = sym; | |
4118 | ||
4119 | m = gfc_match_formal_arglist (sym, 0, 0); | |
4120 | if (m == MATCH_NO) | |
9b435b6d | 4121 | { |
4122 | gfc_error ("Expected formal argument list in function " | |
1a9745d2 | 4123 | "definition at %C"); |
9b435b6d | 4124 | m = MATCH_ERROR; |
4125 | goto cleanup; | |
4126 | } | |
4ee9c684 | 4127 | else if (m == MATCH_ERROR) |
4128 | goto cleanup; | |
4129 | ||
4130 | result = NULL; | |
4131 | ||
c5d33754 | 4132 | /* According to the draft, the bind(c) and result clause can |
4133 | come in either order after the formal_arg_list (i.e., either | |
4134 | can be first, both can exist together or by themselves or neither | |
4135 | one). Therefore, the match_result can't match the end of the | |
4136 | string, and check for the bind(c) or result clause in either order. */ | |
4137 | found_match = gfc_match_eos (); | |
4138 | ||
4139 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
4140 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4141 | not allowed for procedures. */ | |
4142 | if (sym->attr.is_bind_c == 1) | |
4143 | { | |
4144 | sym->attr.is_bind_c = 0; | |
4145 | if (sym->old_symbol != NULL) | |
4146 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4147 | "variables or common blocks", | |
4148 | &(sym->old_symbol->declared_at)); | |
4149 | else | |
4150 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4151 | "variables or common blocks", &gfc_current_locus); | |
4ee9c684 | 4152 | } |
4153 | ||
c5d33754 | 4154 | if (found_match != MATCH_YES) |
4ee9c684 | 4155 | { |
c5d33754 | 4156 | /* If we haven't found the end-of-statement, look for a suffix. */ |
4157 | suffix_match = gfc_match_suffix (sym, &result); | |
4158 | if (suffix_match == MATCH_YES) | |
4159 | /* Need to get the eos now. */ | |
4160 | found_match = gfc_match_eos (); | |
4161 | else | |
4162 | found_match = suffix_match; | |
4ee9c684 | 4163 | } |
4164 | ||
c5d33754 | 4165 | if(found_match != MATCH_YES) |
4166 | m = MATCH_ERROR; | |
4ee9c684 | 4167 | else |
4168 | { | |
c5d33754 | 4169 | /* Make changes to the symbol. */ |
4170 | m = MATCH_ERROR; | |
4171 | ||
4172 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) | |
4173 | goto cleanup; | |
4174 | ||
4175 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
4176 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4177 | goto cleanup; | |
4ee9c684 | 4178 | |
c5d33754 | 4179 | if (current_ts.type != BT_UNKNOWN && sym->ts.type != BT_UNKNOWN |
4180 | && !sym->attr.implicit_type) | |
4181 | { | |
4182 | gfc_error ("Function '%s' at %C already has a type of %s", name, | |
4183 | gfc_basic_typename (sym->ts.type)); | |
4184 | goto cleanup; | |
4185 | } | |
4186 | ||
4187 | if (result == NULL) | |
4188 | { | |
4189 | sym->ts = current_ts; | |
4190 | sym->result = sym; | |
4191 | } | |
4192 | else | |
4193 | { | |
4194 | result->ts = current_ts; | |
4195 | sym->result = result; | |
4196 | } | |
4197 | ||
4198 | return MATCH_YES; | |
4199 | } | |
4ee9c684 | 4200 | |
4201 | cleanup: | |
cbb9e6aa | 4202 | gfc_current_locus = old_loc; |
4ee9c684 | 4203 | return m; |
4204 | } | |
4205 | ||
1a9745d2 | 4206 | |
4207 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
4208 | pass the name of the entry, rather than the gfc_current_block name, and | |
4209 | to return false upon finding an existing global entry. */ | |
858f9894 | 4210 | |
4211 | static bool | |
1a9745d2 | 4212 | add_global_entry (const char *name, int sub) |
858f9894 | 4213 | { |
4214 | gfc_gsymbol *s; | |
4215 | ||
4216 | s = gfc_get_gsymbol(name); | |
4217 | ||
4218 | if (s->defined | |
1a9745d2 | 4219 | || (s->type != GSYM_UNKNOWN |
4220 | && s->type != (sub ? GSYM_SUBROUTINE : GSYM_FUNCTION))) | |
858f9894 | 4221 | global_used(s, NULL); |
4222 | else | |
4223 | { | |
4224 | s->type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; | |
4225 | s->where = gfc_current_locus; | |
4226 | s->defined = 1; | |
4227 | return true; | |
4228 | } | |
4229 | return false; | |
4230 | } | |
4ee9c684 | 4231 | |
1a9745d2 | 4232 | |
4ee9c684 | 4233 | /* Match an ENTRY statement. */ |
4234 | ||
4235 | match | |
4236 | gfc_match_entry (void) | |
4237 | { | |
1b716045 | 4238 | gfc_symbol *proc; |
4239 | gfc_symbol *result; | |
4240 | gfc_symbol *entry; | |
4ee9c684 | 4241 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
4242 | gfc_compile_state state; | |
4243 | match m; | |
1b716045 | 4244 | gfc_entry_list *el; |
7b5e1acc | 4245 | locus old_loc; |
d77f260f | 4246 | bool module_procedure; |
4ee9c684 | 4247 | |
4248 | m = gfc_match_name (name); | |
4249 | if (m != MATCH_YES) | |
4250 | return m; | |
4251 | ||
1b716045 | 4252 | state = gfc_current_state (); |
ea37f786 | 4253 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
1b716045 | 4254 | { |
ea37f786 | 4255 | switch (state) |
4256 | { | |
4257 | case COMP_PROGRAM: | |
4258 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
4259 | break; | |
4260 | case COMP_MODULE: | |
4261 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
4262 | break; | |
4263 | case COMP_BLOCK_DATA: | |
1a9745d2 | 4264 | gfc_error ("ENTRY statement at %C cannot appear within " |
4265 | "a BLOCK DATA"); | |
ea37f786 | 4266 | break; |
4267 | case COMP_INTERFACE: | |
1a9745d2 | 4268 | gfc_error ("ENTRY statement at %C cannot appear within " |
4269 | "an INTERFACE"); | |
ea37f786 | 4270 | break; |
4271 | case COMP_DERIVED: | |
1a9745d2 | 4272 | gfc_error ("ENTRY statement at %C cannot appear within " |
4273 | "a DERIVED TYPE block"); | |
ea37f786 | 4274 | break; |
4275 | case COMP_IF: | |
1a9745d2 | 4276 | gfc_error ("ENTRY statement at %C cannot appear within " |
4277 | "an IF-THEN block"); | |
ea37f786 | 4278 | break; |
4279 | case COMP_DO: | |
1a9745d2 | 4280 | gfc_error ("ENTRY statement at %C cannot appear within " |
4281 | "a DO block"); | |
ea37f786 | 4282 | break; |
4283 | case COMP_SELECT: | |
1a9745d2 | 4284 | gfc_error ("ENTRY statement at %C cannot appear within " |
4285 | "a SELECT block"); | |
ea37f786 | 4286 | break; |
4287 | case COMP_FORALL: | |
1a9745d2 | 4288 | gfc_error ("ENTRY statement at %C cannot appear within " |
4289 | "a FORALL block"); | |
ea37f786 | 4290 | break; |
4291 | case COMP_WHERE: | |
1a9745d2 | 4292 | gfc_error ("ENTRY statement at %C cannot appear within " |
4293 | "a WHERE block"); | |
ea37f786 | 4294 | break; |
4295 | case COMP_CONTAINS: | |
1a9745d2 | 4296 | gfc_error ("ENTRY statement at %C cannot appear within " |
4297 | "a contained subprogram"); | |
ea37f786 | 4298 | break; |
4299 | default: | |
4300 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
4301 | } | |
1b716045 | 4302 | return MATCH_ERROR; |
4303 | } | |
4304 | ||
d77f260f | 4305 | module_procedure = gfc_current_ns->parent != NULL |
1a9745d2 | 4306 | && gfc_current_ns->parent->proc_name |
4307 | && gfc_current_ns->parent->proc_name->attr.flavor | |
4308 | == FL_MODULE; | |
d77f260f | 4309 | |
1b716045 | 4310 | if (gfc_current_ns->parent != NULL |
4311 | && gfc_current_ns->parent->proc_name | |
d77f260f | 4312 | && !module_procedure) |
1b716045 | 4313 | { |
4314 | gfc_error("ENTRY statement at %C cannot appear in a " | |
4315 | "contained procedure"); | |
4316 | return MATCH_ERROR; | |
4317 | } | |
4318 | ||
d77f260f | 4319 | /* Module function entries need special care in get_proc_name |
4320 | because previous references within the function will have | |
4321 | created symbols attached to the current namespace. */ | |
4322 | if (get_proc_name (name, &entry, | |
4323 | gfc_current_ns->parent != NULL | |
4324 | && module_procedure | |
4325 | && gfc_current_ns->proc_name->attr.function)) | |
4ee9c684 | 4326 | return MATCH_ERROR; |
4327 | ||
1b716045 | 4328 | proc = gfc_current_block (); |
4329 | ||
4330 | if (state == COMP_SUBROUTINE) | |
4ee9c684 | 4331 | { |
950683ed | 4332 | /* An entry in a subroutine. */ |
858f9894 | 4333 | if (!add_global_entry (name, 1)) |
4334 | return MATCH_ERROR; | |
4335 | ||
4ee9c684 | 4336 | m = gfc_match_formal_arglist (entry, 0, 1); |
4337 | if (m != MATCH_YES) | |
4338 | return MATCH_ERROR; | |
4339 | ||
950683ed | 4340 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4341 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 4342 | return MATCH_ERROR; |
1b716045 | 4343 | } |
4344 | else | |
4345 | { | |
7b5e1acc | 4346 | /* An entry in a function. |
1a9745d2 | 4347 | We need to take special care because writing |
4348 | ENTRY f() | |
4349 | as | |
4350 | ENTRY f | |
4351 | is allowed, whereas | |
4352 | ENTRY f() RESULT (r) | |
4353 | can't be written as | |
4354 | ENTRY f RESULT (r). */ | |
858f9894 | 4355 | if (!add_global_entry (name, 0)) |
4356 | return MATCH_ERROR; | |
4357 | ||
7b5e1acc | 4358 | old_loc = gfc_current_locus; |
4359 | if (gfc_match_eos () == MATCH_YES) | |
4360 | { | |
4361 | gfc_current_locus = old_loc; | |
4362 | /* Match the empty argument list, and add the interface to | |
4363 | the symbol. */ | |
4364 | m = gfc_match_formal_arglist (entry, 0, 1); | |
4365 | } | |
4366 | else | |
4367 | m = gfc_match_formal_arglist (entry, 0, 0); | |
4368 | ||
4ee9c684 | 4369 | if (m != MATCH_YES) |
4370 | return MATCH_ERROR; | |
4371 | ||
4ee9c684 | 4372 | result = NULL; |
4373 | ||
4374 | if (gfc_match_eos () == MATCH_YES) | |
4375 | { | |
950683ed | 4376 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4377 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 4378 | return MATCH_ERROR; |
4379 | ||
c6871095 | 4380 | entry->result = entry; |
4ee9c684 | 4381 | } |
4382 | else | |
4383 | { | |
1b716045 | 4384 | m = match_result (proc, &result); |
4ee9c684 | 4385 | if (m == MATCH_NO) |
4386 | gfc_syntax_error (ST_ENTRY); | |
4387 | if (m != MATCH_YES) | |
4388 | return MATCH_ERROR; | |
4389 | ||
950683ed | 4390 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE |
4391 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
1a9745d2 | 4392 | || gfc_add_function (&entry->attr, result->name, NULL) |
4393 | == FAILURE) | |
4ee9c684 | 4394 | return MATCH_ERROR; |
c6871095 | 4395 | |
4396 | entry->result = result; | |
4ee9c684 | 4397 | } |
4ee9c684 | 4398 | } |
4399 | ||
4400 | if (gfc_match_eos () != MATCH_YES) | |
4401 | { | |
4402 | gfc_syntax_error (ST_ENTRY); | |
4403 | return MATCH_ERROR; | |
4404 | } | |
4405 | ||
1b716045 | 4406 | entry->attr.recursive = proc->attr.recursive; |
4407 | entry->attr.elemental = proc->attr.elemental; | |
4408 | entry->attr.pure = proc->attr.pure; | |
4ee9c684 | 4409 | |
1b716045 | 4410 | el = gfc_get_entry_list (); |
4411 | el->sym = entry; | |
4412 | el->next = gfc_current_ns->entries; | |
4413 | gfc_current_ns->entries = el; | |
4414 | if (el->next) | |
4415 | el->id = el->next->id + 1; | |
4416 | else | |
4417 | el->id = 1; | |
4ee9c684 | 4418 | |
1b716045 | 4419 | new_st.op = EXEC_ENTRY; |
4420 | new_st.ext.entry = el; | |
4421 | ||
4422 | return MATCH_YES; | |
4ee9c684 | 4423 | } |
4424 | ||
4425 | ||
4426 | /* Match a subroutine statement, including optional prefixes. */ | |
4427 | ||
4428 | match | |
4429 | gfc_match_subroutine (void) | |
4430 | { | |
4431 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4432 | gfc_symbol *sym; | |
4433 | match m; | |
c5d33754 | 4434 | match is_bind_c; |
4435 | char peek_char; | |
4ee9c684 | 4436 | |
4437 | if (gfc_current_state () != COMP_NONE | |
4438 | && gfc_current_state () != COMP_INTERFACE | |
4439 | && gfc_current_state () != COMP_CONTAINS) | |
4440 | return MATCH_NO; | |
4441 | ||
4442 | m = match_prefix (NULL); | |
4443 | if (m != MATCH_YES) | |
4444 | return m; | |
4445 | ||
4446 | m = gfc_match ("subroutine% %n", name); | |
4447 | if (m != MATCH_YES) | |
4448 | return m; | |
4449 | ||
d77f260f | 4450 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 4451 | return MATCH_ERROR; |
4452 | gfc_new_block = sym; | |
4453 | ||
c5d33754 | 4454 | /* Check what next non-whitespace character is so we can tell if there |
4455 | where the required parens if we have a BIND(C). */ | |
4456 | gfc_gobble_whitespace (); | |
4457 | peek_char = gfc_peek_char (); | |
4458 | ||
950683ed | 4459 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
4ee9c684 | 4460 | return MATCH_ERROR; |
4461 | ||
4462 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
4463 | return MATCH_ERROR; | |
4464 | ||
c5d33754 | 4465 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
4466 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4467 | not allowed for procedures. */ | |
4468 | if (sym->attr.is_bind_c == 1) | |
4469 | { | |
4470 | sym->attr.is_bind_c = 0; | |
4471 | if (sym->old_symbol != NULL) | |
4472 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4473 | "variables or common blocks", | |
4474 | &(sym->old_symbol->declared_at)); | |
4475 | else | |
4476 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4477 | "variables or common blocks", &gfc_current_locus); | |
4478 | } | |
4479 | ||
4480 | /* Here, we are just checking if it has the bind(c) attribute, and if | |
4481 | so, then we need to make sure it's all correct. If it doesn't, | |
4482 | we still need to continue matching the rest of the subroutine line. */ | |
4483 | is_bind_c = gfc_match_bind_c (sym); | |
4484 | if (is_bind_c == MATCH_ERROR) | |
4485 | { | |
4486 | /* There was an attempt at the bind(c), but it was wrong. An | |
4487 | error message should have been printed w/in the gfc_match_bind_c | |
4488 | so here we'll just return the MATCH_ERROR. */ | |
4489 | return MATCH_ERROR; | |
4490 | } | |
4491 | ||
4492 | if (is_bind_c == MATCH_YES) | |
4493 | { | |
4494 | if (peek_char != '(') | |
4495 | { | |
4496 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
4497 | return MATCH_ERROR; | |
4498 | } | |
4499 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) | |
4500 | == FAILURE) | |
4501 | return MATCH_ERROR; | |
4502 | } | |
4503 | ||
4ee9c684 | 4504 | if (gfc_match_eos () != MATCH_YES) |
4505 | { | |
4506 | gfc_syntax_error (ST_SUBROUTINE); | |
4507 | return MATCH_ERROR; | |
4508 | } | |
4509 | ||
4510 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4511 | return MATCH_ERROR; | |
4512 | ||
4513 | return MATCH_YES; | |
4514 | } | |
4515 | ||
4516 | ||
c5d33754 | 4517 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
4518 | given, and set the binding label in either the given symbol (if not | |
a0527218 | 4519 | NULL), or in the current_ts. The symbol may be NULL because we may |
c5d33754 | 4520 | encounter the BIND(C) before the declaration itself. Return |
4521 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, | |
4522 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, | |
4523 | or MATCH_YES if the specifier was correct and the binding label and | |
4524 | bind(c) fields were set correctly for the given symbol or the | |
4525 | current_ts. */ | |
4526 | ||
4527 | match | |
4528 | gfc_match_bind_c (gfc_symbol *sym) | |
4529 | { | |
4530 | /* binding label, if exists */ | |
4531 | char binding_label[GFC_MAX_SYMBOL_LEN + 1]; | |
4532 | match double_quote; | |
4533 | match single_quote; | |
c5d33754 | 4534 | |
4535 | /* Initialize the flag that specifies whether we encountered a NAME= | |
4536 | specifier or not. */ | |
4537 | has_name_equals = 0; | |
4538 | ||
4539 | /* Init the first char to nil so we can catch if we don't have | |
4540 | the label (name attr) or the symbol name yet. */ | |
4541 | binding_label[0] = '\0'; | |
4542 | ||
4543 | /* This much we have to be able to match, in this order, if | |
4544 | there is a bind(c) label. */ | |
4545 | if (gfc_match (" bind ( c ") != MATCH_YES) | |
4546 | return MATCH_NO; | |
4547 | ||
4548 | /* Now see if there is a binding label, or if we've reached the | |
4549 | end of the bind(c) attribute without one. */ | |
4550 | if (gfc_match_char (',') == MATCH_YES) | |
4551 | { | |
4552 | if (gfc_match (" name = ") != MATCH_YES) | |
4553 | { | |
4554 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
4555 | "at %C"); | |
4556 | /* should give an error message here */ | |
4557 | return MATCH_ERROR; | |
4558 | } | |
4559 | ||
4560 | has_name_equals = 1; | |
4561 | ||
4562 | /* Get the opening quote. */ | |
4563 | double_quote = MATCH_YES; | |
4564 | single_quote = MATCH_YES; | |
4565 | double_quote = gfc_match_char ('"'); | |
4566 | if (double_quote != MATCH_YES) | |
4567 | single_quote = gfc_match_char ('\''); | |
4568 | if (double_quote != MATCH_YES && single_quote != MATCH_YES) | |
4569 | { | |
4570 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
4571 | "at %C"); | |
4572 | return MATCH_ERROR; | |
4573 | } | |
4574 | ||
4575 | /* Grab the binding label, using functions that will not lower | |
4576 | case the names automatically. */ | |
4577 | if (gfc_match_name_C (binding_label) != MATCH_YES) | |
4578 | return MATCH_ERROR; | |
4579 | ||
4580 | /* Get the closing quotation. */ | |
4581 | if (double_quote == MATCH_YES) | |
4582 | { | |
4583 | if (gfc_match_char ('"') != MATCH_YES) | |
4584 | { | |
4585 | gfc_error ("Missing closing quote '\"' for binding label at %C"); | |
4586 | /* User started string with '"' so looked to match it. */ | |
4587 | return MATCH_ERROR; | |
4588 | } | |
4589 | } | |
4590 | else | |
4591 | { | |
4592 | if (gfc_match_char ('\'') != MATCH_YES) | |
4593 | { | |
4594 | gfc_error ("Missing closing quote '\'' for binding label at %C"); | |
4595 | /* User started string with "'" char. */ | |
4596 | return MATCH_ERROR; | |
4597 | } | |
4598 | } | |
4599 | } | |
4600 | ||
4601 | /* Get the required right paren. */ | |
4602 | if (gfc_match_char (')') != MATCH_YES) | |
4603 | { | |
4604 | gfc_error ("Missing closing paren for binding label at %C"); | |
4605 | return MATCH_ERROR; | |
4606 | } | |
4607 | ||
4608 | /* Save the binding label to the symbol. If sym is null, we're | |
4609 | probably matching the typespec attributes of a declaration and | |
4610 | haven't gotten the name yet, and therefore, no symbol yet. */ | |
4611 | if (binding_label[0] != '\0') | |
4612 | { | |
4613 | if (sym != NULL) | |
4614 | { | |
4615 | strncpy (sym->binding_label, binding_label, | |
4616 | strlen (binding_label)+1); | |
4617 | } | |
4618 | else | |
4619 | strncpy (curr_binding_label, binding_label, | |
4620 | strlen (binding_label) + 1); | |
4621 | } | |
4622 | else | |
4623 | { | |
4624 | /* No binding label, but if symbol isn't null, we | |
4625 | can set the label for it here. */ | |
4626 | /* TODO: If the name= was given and no binding label (name=""), we simply | |
4627 | will let fortran mangle the symbol name as it usually would. | |
4628 | However, this could still let C call it if the user looked up the | |
4629 | symbol in the object file. Should the name set during mangling in | |
4630 | trans-decl.c be marked with characters that are invalid for C to | |
4631 | prevent this? */ | |
4632 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) | |
4633 | strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1); | |
4634 | } | |
94fa7146 | 4635 | |
5cf92482 | 4636 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
4637 | && current_interface.type == INTERFACE_ABSTRACT) | |
94fa7146 | 4638 | { |
4639 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); | |
4640 | return MATCH_ERROR; | |
4641 | } | |
4642 | ||
c5d33754 | 4643 | return MATCH_YES; |
4644 | } | |
4645 | ||
4646 | ||
231e961a | 4647 | /* Return nonzero if we're currently compiling a contained procedure. */ |
c0985832 | 4648 | |
4649 | static int | |
4650 | contained_procedure (void) | |
4651 | { | |
4652 | gfc_state_data *s; | |
4653 | ||
4654 | for (s=gfc_state_stack; s; s=s->previous) | |
4655 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) | |
1a9745d2 | 4656 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) |
c0985832 | 4657 | return 1; |
4658 | ||
4659 | return 0; | |
4660 | } | |
4661 | ||
e14bee04 | 4662 | /* Set the kind of each enumerator. The kind is selected such that it is |
3b6a4b41 | 4663 | interoperable with the corresponding C enumeration type, making |
4664 | sure that -fshort-enums is honored. */ | |
4665 | ||
4666 | static void | |
4667 | set_enum_kind(void) | |
4668 | { | |
4669 | enumerator_history *current_history = NULL; | |
4670 | int kind; | |
4671 | int i; | |
4672 | ||
4673 | if (max_enum == NULL || enum_history == NULL) | |
4674 | return; | |
4675 | ||
4676 | if (!gfc_option.fshort_enums) | |
e14bee04 | 4677 | return; |
4678 | ||
3b6a4b41 | 4679 | i = 0; |
4680 | do | |
4681 | { | |
4682 | kind = gfc_integer_kinds[i++].kind; | |
4683 | } | |
e14bee04 | 4684 | while (kind < gfc_c_int_kind |
3b6a4b41 | 4685 | && gfc_check_integer_range (max_enum->initializer->value.integer, |
4686 | kind) != ARITH_OK); | |
4687 | ||
4688 | current_history = enum_history; | |
4689 | while (current_history != NULL) | |
4690 | { | |
4691 | current_history->sym->ts.kind = kind; | |
4692 | current_history = current_history->next; | |
4693 | } | |
4694 | } | |
4695 | ||
1a9745d2 | 4696 | |
4ee9c684 | 4697 | /* Match any of the various end-block statements. Returns the type of |
4698 | END to the caller. The END INTERFACE, END IF, END DO and END | |
4699 | SELECT statements cannot be replaced by a single END statement. */ | |
4700 | ||
4701 | match | |
1a9745d2 | 4702 | gfc_match_end (gfc_statement *st) |
4ee9c684 | 4703 | { |
4704 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4705 | gfc_compile_state state; | |
4706 | locus old_loc; | |
4707 | const char *block_name; | |
4708 | const char *target; | |
c0985832 | 4709 | int eos_ok; |
4ee9c684 | 4710 | match m; |
4711 | ||
cbb9e6aa | 4712 | old_loc = gfc_current_locus; |
4ee9c684 | 4713 | if (gfc_match ("end") != MATCH_YES) |
4714 | return MATCH_NO; | |
4715 | ||
4716 | state = gfc_current_state (); | |
1a9745d2 | 4717 | block_name = gfc_current_block () == NULL |
4718 | ? NULL : gfc_current_block ()->name; | |
4ee9c684 | 4719 | |
4720 | if (state == COMP_CONTAINS) | |
4721 | { | |
4722 | state = gfc_state_stack->previous->state; | |
1a9745d2 | 4723 | block_name = gfc_state_stack->previous->sym == NULL |
4724 | ? NULL : gfc_state_stack->previous->sym->name; | |
4ee9c684 | 4725 | } |
4726 | ||
4727 | switch (state) | |
4728 | { | |
4729 | case COMP_NONE: | |
4730 | case COMP_PROGRAM: | |
4731 | *st = ST_END_PROGRAM; | |
4732 | target = " program"; | |
c0985832 | 4733 | eos_ok = 1; |
4ee9c684 | 4734 | break; |
4735 | ||
4736 | case COMP_SUBROUTINE: | |
4737 | *st = ST_END_SUBROUTINE; | |
4738 | target = " subroutine"; | |
c0985832 | 4739 | eos_ok = !contained_procedure (); |
4ee9c684 | 4740 | break; |
4741 | ||
4742 | case COMP_FUNCTION: | |
4743 | *st = ST_END_FUNCTION; | |
4744 | target = " function"; | |
c0985832 | 4745 | eos_ok = !contained_procedure (); |
4ee9c684 | 4746 | break; |
4747 | ||
4748 | case COMP_BLOCK_DATA: | |
4749 | *st = ST_END_BLOCK_DATA; | |
4750 | target = " block data"; | |
c0985832 | 4751 | eos_ok = 1; |
4ee9c684 | 4752 | break; |
4753 | ||
4754 | case COMP_MODULE: | |
4755 | *st = ST_END_MODULE; | |
4756 | target = " module"; | |
c0985832 | 4757 | eos_ok = 1; |
4ee9c684 | 4758 | break; |
4759 | ||
4760 | case COMP_INTERFACE: | |
4761 | *st = ST_END_INTERFACE; | |
4762 | target = " interface"; | |
c0985832 | 4763 | eos_ok = 0; |
4ee9c684 | 4764 | break; |
4765 | ||
4766 | case COMP_DERIVED: | |
4767 | *st = ST_END_TYPE; | |
4768 | target = " type"; | |
c0985832 | 4769 | eos_ok = 0; |
4ee9c684 | 4770 | break; |
4771 | ||
4772 | case COMP_IF: | |
4773 | *st = ST_ENDIF; | |
4774 | target = " if"; | |
c0985832 | 4775 | eos_ok = 0; |
4ee9c684 | 4776 | break; |
4777 | ||
4778 | case COMP_DO: | |
4779 | *st = ST_ENDDO; | |
4780 | target = " do"; | |
c0985832 | 4781 | eos_ok = 0; |
4ee9c684 | 4782 | break; |
4783 | ||
4784 | case COMP_SELECT: | |
4785 | *st = ST_END_SELECT; | |
4786 | target = " select"; | |
c0985832 | 4787 | eos_ok = 0; |
4ee9c684 | 4788 | break; |
4789 | ||
4790 | case COMP_FORALL: | |
4791 | *st = ST_END_FORALL; | |
4792 | target = " forall"; | |
c0985832 | 4793 | eos_ok = 0; |
4ee9c684 | 4794 | break; |
4795 | ||
4796 | case COMP_WHERE: | |
4797 | *st = ST_END_WHERE; | |
4798 | target = " where"; | |
c0985832 | 4799 | eos_ok = 0; |
4ee9c684 | 4800 | break; |
4801 | ||
3b6a4b41 | 4802 | case COMP_ENUM: |
4803 | *st = ST_END_ENUM; | |
4804 | target = " enum"; | |
4805 | eos_ok = 0; | |
4806 | last_initializer = NULL; | |
4807 | set_enum_kind (); | |
4808 | gfc_free_enum_history (); | |
4809 | break; | |
4810 | ||
4ee9c684 | 4811 | default: |
4812 | gfc_error ("Unexpected END statement at %C"); | |
4813 | goto cleanup; | |
4814 | } | |
4815 | ||
4816 | if (gfc_match_eos () == MATCH_YES) | |
4817 | { | |
c0985832 | 4818 | if (!eos_ok) |
4ee9c684 | 4819 | { |
f6d0e37a | 4820 | /* We would have required END [something]. */ |
d197c9ee | 4821 | gfc_error ("%s statement expected at %L", |
4822 | gfc_ascii_statement (*st), &old_loc); | |
4ee9c684 | 4823 | goto cleanup; |
4824 | } | |
4825 | ||
4826 | return MATCH_YES; | |
4827 | } | |
4828 | ||
4829 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
4830 | if (gfc_match (target) != MATCH_YES) | |
4831 | { | |
4832 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
4833 | goto cleanup; | |
4834 | } | |
4835 | ||
4836 | /* If we're at the end, make sure a block name wasn't required. */ | |
4837 | if (gfc_match_eos () == MATCH_YES) | |
4838 | { | |
4839 | ||
0d0ce415 | 4840 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT |
4841 | && *st != ST_END_FORALL && *st != ST_END_WHERE) | |
4ee9c684 | 4842 | return MATCH_YES; |
4843 | ||
4844 | if (gfc_current_block () == NULL) | |
4845 | return MATCH_YES; | |
4846 | ||
4847 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
4848 | block_name, gfc_ascii_statement (*st)); | |
4849 | ||
4850 | return MATCH_ERROR; | |
4851 | } | |
4852 | ||
4853 | /* END INTERFACE has a special handler for its several possible endings. */ | |
4854 | if (*st == ST_END_INTERFACE) | |
4855 | return gfc_match_end_interface (); | |
4856 | ||
f6d0e37a | 4857 | /* We haven't hit the end of statement, so what is left must be an |
4858 | end-name. */ | |
4ee9c684 | 4859 | m = gfc_match_space (); |
4860 | if (m == MATCH_YES) | |
4861 | m = gfc_match_name (name); | |
4862 | ||
4863 | if (m == MATCH_NO) | |
4864 | gfc_error ("Expected terminating name at %C"); | |
4865 | if (m != MATCH_YES) | |
4866 | goto cleanup; | |
4867 | ||
4868 | if (block_name == NULL) | |
4869 | goto syntax; | |
4870 | ||
4871 | if (strcmp (name, block_name) != 0) | |
4872 | { | |
4873 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
4874 | gfc_ascii_statement (*st)); | |
4875 | goto cleanup; | |
4876 | } | |
4877 | ||
4878 | if (gfc_match_eos () == MATCH_YES) | |
4879 | return MATCH_YES; | |
4880 | ||
4881 | syntax: | |
4882 | gfc_syntax_error (*st); | |
4883 | ||
4884 | cleanup: | |
cbb9e6aa | 4885 | gfc_current_locus = old_loc; |
4ee9c684 | 4886 | return MATCH_ERROR; |
4887 | } | |
4888 | ||
4889 | ||
4890 | ||
4891 | /***************** Attribute declaration statements ****************/ | |
4892 | ||
4893 | /* Set the attribute of a single variable. */ | |
4894 | ||
4895 | static match | |
4896 | attr_decl1 (void) | |
4897 | { | |
4898 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4899 | gfc_array_spec *as; | |
4900 | gfc_symbol *sym; | |
4901 | locus var_locus; | |
4902 | match m; | |
4903 | ||
4904 | as = NULL; | |
4905 | ||
4906 | m = gfc_match_name (name); | |
4907 | if (m != MATCH_YES) | |
4908 | goto cleanup; | |
4909 | ||
4910 | if (find_special (name, &sym)) | |
4911 | return MATCH_ERROR; | |
4912 | ||
cbb9e6aa | 4913 | var_locus = gfc_current_locus; |
4ee9c684 | 4914 | |
4915 | /* Deal with possible array specification for certain attributes. */ | |
4916 | if (current_attr.dimension | |
4917 | || current_attr.allocatable | |
4918 | || current_attr.pointer | |
4919 | || current_attr.target) | |
4920 | { | |
4921 | m = gfc_match_array_spec (&as); | |
4922 | if (m == MATCH_ERROR) | |
4923 | goto cleanup; | |
4924 | ||
4925 | if (current_attr.dimension && m == MATCH_NO) | |
4926 | { | |
1a9745d2 | 4927 | gfc_error ("Missing array specification at %L in DIMENSION " |
4928 | "statement", &var_locus); | |
4ee9c684 | 4929 | m = MATCH_ERROR; |
4930 | goto cleanup; | |
4931 | } | |
4932 | ||
4933 | if ((current_attr.allocatable || current_attr.pointer) | |
4934 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
4935 | { | |
1a9745d2 | 4936 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
4ee9c684 | 4937 | m = MATCH_ERROR; |
4938 | goto cleanup; | |
4939 | } | |
4940 | } | |
4941 | ||
1a9745d2 | 4942 | /* Update symbol table. DIMENSION attribute is set |
4943 | in gfc_set_array_spec(). */ | |
4ee9c684 | 4944 | if (current_attr.dimension == 0 |
4945 | && gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
4946 | { | |
4947 | m = MATCH_ERROR; | |
4948 | goto cleanup; | |
4949 | } | |
4950 | ||
4951 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
4952 | { | |
4953 | m = MATCH_ERROR; | |
4954 | goto cleanup; | |
4955 | } | |
e14bee04 | 4956 | |
b549d2a5 | 4957 | if (sym->attr.cray_pointee && sym->as != NULL) |
4958 | { | |
4959 | /* Fix the array spec. */ | |
4960 | m = gfc_mod_pointee_as (sym->as); | |
4961 | if (m == MATCH_ERROR) | |
4962 | goto cleanup; | |
4963 | } | |
4ee9c684 | 4964 | |
25dd7350 | 4965 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
14efb9b7 | 4966 | { |
4967 | m = MATCH_ERROR; | |
4968 | goto cleanup; | |
4969 | } | |
4970 | ||
4ee9c684 | 4971 | if ((current_attr.external || current_attr.intrinsic) |
4972 | && sym->attr.flavor != FL_PROCEDURE | |
950683ed | 4973 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
4ee9c684 | 4974 | { |
4975 | m = MATCH_ERROR; | |
4976 | goto cleanup; | |
4977 | } | |
4978 | ||
4979 | return MATCH_YES; | |
4980 | ||
4981 | cleanup: | |
4982 | gfc_free_array_spec (as); | |
4983 | return m; | |
4984 | } | |
4985 | ||
4986 | ||
4987 | /* Generic attribute declaration subroutine. Used for attributes that | |
4988 | just have a list of names. */ | |
4989 | ||
4990 | static match | |
4991 | attr_decl (void) | |
4992 | { | |
4993 | match m; | |
4994 | ||
4995 | /* Gobble the optional double colon, by simply ignoring the result | |
4996 | of gfc_match(). */ | |
4997 | gfc_match (" ::"); | |
4998 | ||
4999 | for (;;) | |
5000 | { | |
5001 | m = attr_decl1 (); | |
5002 | if (m != MATCH_YES) | |
5003 | break; | |
5004 | ||
5005 | if (gfc_match_eos () == MATCH_YES) | |
5006 | { | |
5007 | m = MATCH_YES; | |
5008 | break; | |
5009 | } | |
5010 | ||
5011 | if (gfc_match_char (',') != MATCH_YES) | |
5012 | { | |
5013 | gfc_error ("Unexpected character in variable list at %C"); | |
5014 | m = MATCH_ERROR; | |
5015 | break; | |
5016 | } | |
5017 | } | |
5018 | ||
5019 | return m; | |
5020 | } | |
5021 | ||
5022 | ||
b549d2a5 | 5023 | /* This routine matches Cray Pointer declarations of the form: |
5024 | pointer ( <pointer>, <pointee> ) | |
5025 | or | |
e14bee04 | 5026 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
5027 | The pointer, if already declared, should be an integer. Otherwise, we | |
b549d2a5 | 5028 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
5029 | be either a scalar, or an array declaration. No space is allocated for | |
e14bee04 | 5030 | the pointee. For the statement |
b549d2a5 | 5031 | pointer (ipt, ar(10)) |
5032 | any subsequent uses of ar will be translated (in C-notation) as | |
e14bee04 | 5033 | ar(i) => ((<type> *) ipt)(i) |
b7bf3f81 | 5034 | After gimplification, pointee variable will disappear in the code. */ |
b549d2a5 | 5035 | |
5036 | static match | |
5037 | cray_pointer_decl (void) | |
5038 | { | |
5039 | match m; | |
5040 | gfc_array_spec *as; | |
5041 | gfc_symbol *cptr; /* Pointer symbol. */ | |
5042 | gfc_symbol *cpte; /* Pointee symbol. */ | |
5043 | locus var_locus; | |
5044 | bool done = false; | |
5045 | ||
5046 | while (!done) | |
5047 | { | |
5048 | if (gfc_match_char ('(') != MATCH_YES) | |
5049 | { | |
5050 | gfc_error ("Expected '(' at %C"); | |
e14bee04 | 5051 | return MATCH_ERROR; |
b549d2a5 | 5052 | } |
e14bee04 | 5053 | |
b549d2a5 | 5054 | /* Match pointer. */ |
5055 | var_locus = gfc_current_locus; | |
5056 | gfc_clear_attr (¤t_attr); | |
5057 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
5058 | current_ts.type = BT_INTEGER; | |
5059 | current_ts.kind = gfc_index_integer_kind; | |
5060 | ||
e14bee04 | 5061 | m = gfc_match_symbol (&cptr, 0); |
b549d2a5 | 5062 | if (m != MATCH_YES) |
5063 | { | |
5064 | gfc_error ("Expected variable name at %C"); | |
5065 | return m; | |
5066 | } | |
e14bee04 | 5067 | |
b549d2a5 | 5068 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) |
5069 | return MATCH_ERROR; | |
5070 | ||
e14bee04 | 5071 | gfc_set_sym_referenced (cptr); |
b549d2a5 | 5072 | |
5073 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
5074 | { | |
5075 | cptr->ts.type = BT_INTEGER; | |
e14bee04 | 5076 | cptr->ts.kind = gfc_index_integer_kind; |
b549d2a5 | 5077 | } |
5078 | else if (cptr->ts.type != BT_INTEGER) | |
5079 | { | |
7698a624 | 5080 | gfc_error ("Cray pointer at %C must be an integer"); |
b549d2a5 | 5081 | return MATCH_ERROR; |
5082 | } | |
5083 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
5084 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
7698a624 | 5085 | " memory addresses require %d bytes", |
1a9745d2 | 5086 | cptr->ts.kind, gfc_index_integer_kind); |
b549d2a5 | 5087 | |
5088 | if (gfc_match_char (',') != MATCH_YES) | |
5089 | { | |
5090 | gfc_error ("Expected \",\" at %C"); | |
e14bee04 | 5091 | return MATCH_ERROR; |
b549d2a5 | 5092 | } |
5093 | ||
e14bee04 | 5094 | /* Match Pointee. */ |
b549d2a5 | 5095 | var_locus = gfc_current_locus; |
5096 | gfc_clear_attr (¤t_attr); | |
5097 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
5098 | current_ts.type = BT_UNKNOWN; | |
5099 | current_ts.kind = 0; | |
5100 | ||
5101 | m = gfc_match_symbol (&cpte, 0); | |
5102 | if (m != MATCH_YES) | |
5103 | { | |
5104 | gfc_error ("Expected variable name at %C"); | |
5105 | return m; | |
5106 | } | |
e14bee04 | 5107 | |
b549d2a5 | 5108 | /* Check for an optional array spec. */ |
5109 | m = gfc_match_array_spec (&as); | |
5110 | if (m == MATCH_ERROR) | |
5111 | { | |
5112 | gfc_free_array_spec (as); | |
5113 | return m; | |
5114 | } | |
5115 | else if (m == MATCH_NO) | |
5116 | { | |
5117 | gfc_free_array_spec (as); | |
5118 | as = NULL; | |
5119 | } | |
5120 | ||
5121 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
5122 | return MATCH_ERROR; | |
5123 | ||
5124 | gfc_set_sym_referenced (cpte); | |
5125 | ||
5126 | if (cpte->as == NULL) | |
5127 | { | |
5128 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
5129 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
5130 | } | |
5131 | else if (as != NULL) | |
5132 | { | |
7698a624 | 5133 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 5134 | gfc_free_array_spec (as); |
5135 | return MATCH_ERROR; | |
5136 | } | |
5137 | ||
5138 | as = NULL; | |
5139 | ||
5140 | if (cpte->as != NULL) | |
5141 | { | |
5142 | /* Fix array spec. */ | |
5143 | m = gfc_mod_pointee_as (cpte->as); | |
5144 | if (m == MATCH_ERROR) | |
5145 | return m; | |
5146 | } | |
5147 | ||
5148 | /* Point the Pointee at the Pointer. */ | |
b7bf3f81 | 5149 | cpte->cp_pointer = cptr; |
b549d2a5 | 5150 | |
5151 | if (gfc_match_char (')') != MATCH_YES) | |
5152 | { | |
5153 | gfc_error ("Expected \")\" at %C"); | |
5154 | return MATCH_ERROR; | |
5155 | } | |
5156 | m = gfc_match_char (','); | |
5157 | if (m != MATCH_YES) | |
5158 | done = true; /* Stop searching for more declarations. */ | |
5159 | ||
5160 | } | |
5161 | ||
5162 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
5163 | || gfc_match_eos () != MATCH_YES) | |
5164 | { | |
5165 | gfc_error ("Expected \",\" or end of statement at %C"); | |
5166 | return MATCH_ERROR; | |
5167 | } | |
5168 | return MATCH_YES; | |
5169 | } | |
5170 | ||
5171 | ||
4ee9c684 | 5172 | match |
5173 | gfc_match_external (void) | |
5174 | { | |
5175 | ||
5176 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5177 | current_attr.external = 1; |
4ee9c684 | 5178 | |
5179 | return attr_decl (); | |
5180 | } | |
5181 | ||
5182 | ||
4ee9c684 | 5183 | match |
5184 | gfc_match_intent (void) | |
5185 | { | |
5186 | sym_intent intent; | |
5187 | ||
5188 | intent = match_intent_spec (); | |
5189 | if (intent == INTENT_UNKNOWN) | |
5190 | return MATCH_ERROR; | |
5191 | ||
5192 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5193 | current_attr.intent = intent; |
4ee9c684 | 5194 | |
5195 | return attr_decl (); | |
5196 | } | |
5197 | ||
5198 | ||
5199 | match | |
5200 | gfc_match_intrinsic (void) | |
5201 | { | |
5202 | ||
5203 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5204 | current_attr.intrinsic = 1; |
4ee9c684 | 5205 | |
5206 | return attr_decl (); | |
5207 | } | |
5208 | ||
5209 | ||
5210 | match | |
5211 | gfc_match_optional (void) | |
5212 | { | |
5213 | ||
5214 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5215 | current_attr.optional = 1; |
4ee9c684 | 5216 | |
5217 | return attr_decl (); | |
5218 | } | |
5219 | ||
5220 | ||
5221 | match | |
5222 | gfc_match_pointer (void) | |
5223 | { | |
b549d2a5 | 5224 | gfc_gobble_whitespace (); |
5225 | if (gfc_peek_char () == '(') | |
5226 | { | |
5227 | if (!gfc_option.flag_cray_pointer) | |
5228 | { | |
1a9745d2 | 5229 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
5230 | "flag"); | |
b549d2a5 | 5231 | return MATCH_ERROR; |
5232 | } | |
5233 | return cray_pointer_decl (); | |
5234 | } | |
5235 | else | |
5236 | { | |
5237 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5238 | current_attr.pointer = 1; |
b549d2a5 | 5239 | |
5240 | return attr_decl (); | |
5241 | } | |
4ee9c684 | 5242 | } |
5243 | ||
5244 | ||
5245 | match | |
5246 | gfc_match_allocatable (void) | |
5247 | { | |
4ee9c684 | 5248 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5249 | current_attr.allocatable = 1; |
4ee9c684 | 5250 | |
5251 | return attr_decl (); | |
5252 | } | |
5253 | ||
5254 | ||
5255 | match | |
5256 | gfc_match_dimension (void) | |
5257 | { | |
4ee9c684 | 5258 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5259 | current_attr.dimension = 1; |
4ee9c684 | 5260 | |
5261 | return attr_decl (); | |
5262 | } | |
5263 | ||
5264 | ||
5265 | match | |
5266 | gfc_match_target (void) | |
5267 | { | |
4ee9c684 | 5268 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5269 | current_attr.target = 1; |
4ee9c684 | 5270 | |
5271 | return attr_decl (); | |
5272 | } | |
5273 | ||
5274 | ||
5275 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
5276 | statement. */ | |
5277 | ||
5278 | static match | |
5279 | access_attr_decl (gfc_statement st) | |
5280 | { | |
5281 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5282 | interface_type type; | |
5283 | gfc_user_op *uop; | |
5284 | gfc_symbol *sym; | |
5285 | gfc_intrinsic_op operator; | |
5286 | match m; | |
5287 | ||
5288 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5289 | goto done; | |
5290 | ||
5291 | for (;;) | |
5292 | { | |
5293 | m = gfc_match_generic_spec (&type, name, &operator); | |
5294 | if (m == MATCH_NO) | |
5295 | goto syntax; | |
5296 | if (m == MATCH_ERROR) | |
5297 | return MATCH_ERROR; | |
5298 | ||
5299 | switch (type) | |
5300 | { | |
5301 | case INTERFACE_NAMELESS: | |
94fa7146 | 5302 | case INTERFACE_ABSTRACT: |
4ee9c684 | 5303 | goto syntax; |
5304 | ||
5305 | case INTERFACE_GENERIC: | |
5306 | if (gfc_get_symbol (name, NULL, &sym)) | |
5307 | goto done; | |
5308 | ||
1a9745d2 | 5309 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
5310 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
950683ed | 5311 | sym->name, NULL) == FAILURE) |
4ee9c684 | 5312 | return MATCH_ERROR; |
5313 | ||
5314 | break; | |
5315 | ||
5316 | case INTERFACE_INTRINSIC_OP: | |
5317 | if (gfc_current_ns->operator_access[operator] == ACCESS_UNKNOWN) | |
5318 | { | |
5319 | gfc_current_ns->operator_access[operator] = | |
5320 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
5321 | } | |
5322 | else | |
5323 | { | |
5324 | gfc_error ("Access specification of the %s operator at %C has " | |
5325 | "already been specified", gfc_op2string (operator)); | |
5326 | goto done; | |
5327 | } | |
5328 | ||
5329 | break; | |
5330 | ||
5331 | case INTERFACE_USER_OP: | |
5332 | uop = gfc_get_uop (name); | |
5333 | ||
5334 | if (uop->access == ACCESS_UNKNOWN) | |
5335 | { | |
1a9745d2 | 5336 | uop->access = (st == ST_PUBLIC) |
5337 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
4ee9c684 | 5338 | } |
5339 | else | |
5340 | { | |
1a9745d2 | 5341 | gfc_error ("Access specification of the .%s. operator at %C " |
5342 | "has already been specified", sym->name); | |
4ee9c684 | 5343 | goto done; |
5344 | } | |
5345 | ||
5346 | break; | |
5347 | } | |
5348 | ||
5349 | if (gfc_match_char (',') == MATCH_NO) | |
5350 | break; | |
5351 | } | |
5352 | ||
5353 | if (gfc_match_eos () != MATCH_YES) | |
5354 | goto syntax; | |
5355 | return MATCH_YES; | |
5356 | ||
5357 | syntax: | |
5358 | gfc_syntax_error (st); | |
5359 | ||
5360 | done: | |
5361 | return MATCH_ERROR; | |
5362 | } | |
5363 | ||
5364 | ||
3ea52af3 | 5365 | match |
5366 | gfc_match_protected (void) | |
5367 | { | |
5368 | gfc_symbol *sym; | |
5369 | match m; | |
5370 | ||
5371 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
5372 | { | |
5373 | gfc_error ("PROTECTED at %C only allowed in specification " | |
5374 | "part of a module"); | |
5375 | return MATCH_ERROR; | |
5376 | ||
5377 | } | |
5378 | ||
1a9745d2 | 5379 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
3ea52af3 | 5380 | == FAILURE) |
5381 | return MATCH_ERROR; | |
5382 | ||
5383 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5384 | { | |
5385 | return MATCH_ERROR; | |
5386 | } | |
5387 | ||
5388 | if (gfc_match_eos () == MATCH_YES) | |
5389 | goto syntax; | |
5390 | ||
5391 | for(;;) | |
5392 | { | |
5393 | m = gfc_match_symbol (&sym, 0); | |
5394 | switch (m) | |
5395 | { | |
5396 | case MATCH_YES: | |
1a9745d2 | 5397 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
5398 | == FAILURE) | |
3ea52af3 | 5399 | return MATCH_ERROR; |
5400 | goto next_item; | |
5401 | ||
5402 | case MATCH_NO: | |
5403 | break; | |
5404 | ||
5405 | case MATCH_ERROR: | |
5406 | return MATCH_ERROR; | |
5407 | } | |
5408 | ||
5409 | next_item: | |
5410 | if (gfc_match_eos () == MATCH_YES) | |
5411 | break; | |
5412 | if (gfc_match_char (',') != MATCH_YES) | |
5413 | goto syntax; | |
5414 | } | |
5415 | ||
5416 | return MATCH_YES; | |
5417 | ||
5418 | syntax: | |
5419 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
5420 | return MATCH_ERROR; | |
5421 | } | |
5422 | ||
5423 | ||
a0527218 | 5424 | /* The PRIVATE statement is a bit weird in that it can be an attribute |
4ee9c684 | 5425 | declaration, but also works as a standlone statement inside of a |
5426 | type declaration or a module. */ | |
5427 | ||
5428 | match | |
1a9745d2 | 5429 | gfc_match_private (gfc_statement *st) |
4ee9c684 | 5430 | { |
5431 | ||
5432 | if (gfc_match ("private") != MATCH_YES) | |
5433 | return MATCH_NO; | |
5434 | ||
e14bee04 | 5435 | if (gfc_current_state () != COMP_MODULE |
5436 | && (gfc_current_state () != COMP_DERIVED | |
5437 | || !gfc_state_stack->previous | |
5438 | || gfc_state_stack->previous->state != COMP_MODULE)) | |
5439 | { | |
5440 | gfc_error ("PRIVATE statement at %C is only allowed in the " | |
5441 | "specification part of a module"); | |
5442 | return MATCH_ERROR; | |
5443 | } | |
5444 | ||
4ee9c684 | 5445 | if (gfc_current_state () == COMP_DERIVED) |
5446 | { | |
5447 | if (gfc_match_eos () == MATCH_YES) | |
5448 | { | |
5449 | *st = ST_PRIVATE; | |
5450 | return MATCH_YES; | |
5451 | } | |
5452 | ||
5453 | gfc_syntax_error (ST_PRIVATE); | |
5454 | return MATCH_ERROR; | |
5455 | } | |
5456 | ||
5457 | if (gfc_match_eos () == MATCH_YES) | |
5458 | { | |
5459 | *st = ST_PRIVATE; | |
5460 | return MATCH_YES; | |
5461 | } | |
5462 | ||
5463 | *st = ST_ATTR_DECL; | |
5464 | return access_attr_decl (ST_PRIVATE); | |
5465 | } | |
5466 | ||
5467 | ||
5468 | match | |
1a9745d2 | 5469 | gfc_match_public (gfc_statement *st) |
4ee9c684 | 5470 | { |
5471 | ||
5472 | if (gfc_match ("public") != MATCH_YES) | |
5473 | return MATCH_NO; | |
5474 | ||
e14bee04 | 5475 | if (gfc_current_state () != COMP_MODULE) |
5476 | { | |
5477 | gfc_error ("PUBLIC statement at %C is only allowed in the " | |
5478 | "specification part of a module"); | |
5479 | return MATCH_ERROR; | |
5480 | } | |
5481 | ||
4ee9c684 | 5482 | if (gfc_match_eos () == MATCH_YES) |
5483 | { | |
5484 | *st = ST_PUBLIC; | |
5485 | return MATCH_YES; | |
5486 | } | |
5487 | ||
5488 | *st = ST_ATTR_DECL; | |
5489 | return access_attr_decl (ST_PUBLIC); | |
5490 | } | |
5491 | ||
5492 | ||
5493 | /* Workhorse for gfc_match_parameter. */ | |
5494 | ||
5495 | static match | |
5496 | do_parm (void) | |
5497 | { | |
5498 | gfc_symbol *sym; | |
5499 | gfc_expr *init; | |
5500 | match m; | |
5501 | ||
5502 | m = gfc_match_symbol (&sym, 0); | |
5503 | if (m == MATCH_NO) | |
5504 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
5505 | ||
5506 | if (m != MATCH_YES) | |
5507 | return m; | |
5508 | ||
5509 | if (gfc_match_char ('=') == MATCH_NO) | |
5510 | { | |
5511 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
5512 | return MATCH_ERROR; | |
5513 | } | |
5514 | ||
5515 | m = gfc_match_init_expr (&init); | |
5516 | if (m == MATCH_NO) | |
5517 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
5518 | if (m != MATCH_YES) | |
5519 | return m; | |
5520 | ||
5521 | if (sym->ts.type == BT_UNKNOWN | |
5522 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
5523 | { | |
5524 | m = MATCH_ERROR; | |
5525 | goto cleanup; | |
5526 | } | |
5527 | ||
5528 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
950683ed | 5529 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
4ee9c684 | 5530 | { |
5531 | m = MATCH_ERROR; | |
5532 | goto cleanup; | |
5533 | } | |
5534 | ||
c1b6da4a | 5535 | if (sym->ts.type == BT_CHARACTER |
5536 | && sym->ts.cl != NULL | |
5537 | && sym->ts.cl->length != NULL | |
5538 | && sym->ts.cl->length->expr_type == EXPR_CONSTANT | |
5539 | && init->expr_type == EXPR_CONSTANT | |
5540 | && init->ts.type == BT_CHARACTER | |
5541 | && init->ts.kind == 1) | |
5542 | gfc_set_constant_character_len ( | |
1bfea7e8 | 5543 | mpz_get_si (sym->ts.cl->length->value.integer), init, false); |
c1b6da4a | 5544 | |
4ee9c684 | 5545 | sym->value = init; |
5546 | return MATCH_YES; | |
5547 | ||
5548 | cleanup: | |
5549 | gfc_free_expr (init); | |
5550 | return m; | |
5551 | } | |
5552 | ||
5553 | ||
5554 | /* Match a parameter statement, with the weird syntax that these have. */ | |
5555 | ||
5556 | match | |
5557 | gfc_match_parameter (void) | |
5558 | { | |
5559 | match m; | |
5560 | ||
5561 | if (gfc_match_char ('(') == MATCH_NO) | |
5562 | return MATCH_NO; | |
5563 | ||
5564 | for (;;) | |
5565 | { | |
5566 | m = do_parm (); | |
5567 | if (m != MATCH_YES) | |
5568 | break; | |
5569 | ||
5570 | if (gfc_match (" )%t") == MATCH_YES) | |
5571 | break; | |
5572 | ||
5573 | if (gfc_match_char (',') != MATCH_YES) | |
5574 | { | |
5575 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
5576 | m = MATCH_ERROR; | |
5577 | break; | |
5578 | } | |
5579 | } | |
5580 | ||
5581 | return m; | |
5582 | } | |
5583 | ||
5584 | ||
5585 | /* Save statements have a special syntax. */ | |
5586 | ||
5587 | match | |
5588 | gfc_match_save (void) | |
5589 | { | |
82f5ee13 | 5590 | char n[GFC_MAX_SYMBOL_LEN+1]; |
5591 | gfc_common_head *c; | |
4ee9c684 | 5592 | gfc_symbol *sym; |
5593 | match m; | |
5594 | ||
5595 | if (gfc_match_eos () == MATCH_YES) | |
5596 | { | |
5597 | if (gfc_current_ns->seen_save) | |
5598 | { | |
1a9745d2 | 5599 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
5600 | "follows previous SAVE statement") | |
76e82f95 | 5601 | == FAILURE) |
5602 | return MATCH_ERROR; | |
4ee9c684 | 5603 | } |
5604 | ||
5605 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
5606 | return MATCH_YES; | |
5607 | } | |
5608 | ||
5609 | if (gfc_current_ns->save_all) | |
5610 | { | |
1a9745d2 | 5611 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
5612 | "blanket SAVE statement") | |
76e82f95 | 5613 | == FAILURE) |
5614 | return MATCH_ERROR; | |
4ee9c684 | 5615 | } |
5616 | ||
5617 | gfc_match (" ::"); | |
5618 | ||
5619 | for (;;) | |
5620 | { | |
5621 | m = gfc_match_symbol (&sym, 0); | |
5622 | switch (m) | |
5623 | { | |
5624 | case MATCH_YES: | |
1a9745d2 | 5625 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
5626 | == FAILURE) | |
4ee9c684 | 5627 | return MATCH_ERROR; |
5628 | goto next_item; | |
5629 | ||
5630 | case MATCH_NO: | |
5631 | break; | |
5632 | ||
5633 | case MATCH_ERROR: | |
5634 | return MATCH_ERROR; | |
5635 | } | |
5636 | ||
82f5ee13 | 5637 | m = gfc_match (" / %n /", &n); |
4ee9c684 | 5638 | if (m == MATCH_ERROR) |
5639 | return MATCH_ERROR; | |
5640 | if (m == MATCH_NO) | |
5641 | goto syntax; | |
5642 | ||
403ddc45 | 5643 | c = gfc_get_common (n, 0); |
82f5ee13 | 5644 | c->saved = 1; |
5645 | ||
4ee9c684 | 5646 | gfc_current_ns->seen_save = 1; |
5647 | ||
5648 | next_item: | |
5649 | if (gfc_match_eos () == MATCH_YES) | |
5650 | break; | |
5651 | if (gfc_match_char (',') != MATCH_YES) | |
5652 | goto syntax; | |
5653 | } | |
5654 | ||
5655 | return MATCH_YES; | |
5656 | ||
5657 | syntax: | |
5658 | gfc_error ("Syntax error in SAVE statement at %C"); | |
5659 | return MATCH_ERROR; | |
5660 | } | |
5661 | ||
5662 | ||
8f6339b6 | 5663 | match |
5664 | gfc_match_value (void) | |
5665 | { | |
5666 | gfc_symbol *sym; | |
5667 | match m; | |
5668 | ||
1a9745d2 | 5669 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
8f6339b6 | 5670 | == FAILURE) |
5671 | return MATCH_ERROR; | |
5672 | ||
5673 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5674 | { | |
5675 | return MATCH_ERROR; | |
5676 | } | |
5677 | ||
5678 | if (gfc_match_eos () == MATCH_YES) | |
5679 | goto syntax; | |
5680 | ||
5681 | for(;;) | |
5682 | { | |
5683 | m = gfc_match_symbol (&sym, 0); | |
5684 | switch (m) | |
5685 | { | |
5686 | case MATCH_YES: | |
1a9745d2 | 5687 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
5688 | == FAILURE) | |
8f6339b6 | 5689 | return MATCH_ERROR; |
5690 | goto next_item; | |
5691 | ||
5692 | case MATCH_NO: | |
5693 | break; | |
5694 | ||
5695 | case MATCH_ERROR: | |
5696 | return MATCH_ERROR; | |
5697 | } | |
5698 | ||
5699 | next_item: | |
5700 | if (gfc_match_eos () == MATCH_YES) | |
5701 | break; | |
5702 | if (gfc_match_char (',') != MATCH_YES) | |
5703 | goto syntax; | |
5704 | } | |
5705 | ||
5706 | return MATCH_YES; | |
5707 | ||
5708 | syntax: | |
5709 | gfc_error ("Syntax error in VALUE statement at %C"); | |
5710 | return MATCH_ERROR; | |
5711 | } | |
5712 | ||
f6d0e37a | 5713 | |
ef814c81 | 5714 | match |
5715 | gfc_match_volatile (void) | |
5716 | { | |
5717 | gfc_symbol *sym; | |
5718 | match m; | |
5719 | ||
1a9745d2 | 5720 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
ef814c81 | 5721 | == FAILURE) |
5722 | return MATCH_ERROR; | |
5723 | ||
5724 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5725 | { | |
5726 | return MATCH_ERROR; | |
5727 | } | |
5728 | ||
5729 | if (gfc_match_eos () == MATCH_YES) | |
5730 | goto syntax; | |
5731 | ||
5732 | for(;;) | |
5733 | { | |
2f241857 | 5734 | /* VOLATILE is special because it can be added to host-associated |
5735 | symbols locally. */ | |
5736 | m = gfc_match_symbol (&sym, 1); | |
ef814c81 | 5737 | switch (m) |
5738 | { | |
5739 | case MATCH_YES: | |
1a9745d2 | 5740 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
5741 | == FAILURE) | |
ef814c81 | 5742 | return MATCH_ERROR; |
5743 | goto next_item; | |
5744 | ||
5745 | case MATCH_NO: | |
5746 | break; | |
5747 | ||
5748 | case MATCH_ERROR: | |
5749 | return MATCH_ERROR; | |
5750 | } | |
5751 | ||
5752 | next_item: | |
5753 | if (gfc_match_eos () == MATCH_YES) | |
5754 | break; | |
5755 | if (gfc_match_char (',') != MATCH_YES) | |
5756 | goto syntax; | |
5757 | } | |
5758 | ||
5759 | return MATCH_YES; | |
5760 | ||
5761 | syntax: | |
5762 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
5763 | return MATCH_ERROR; | |
5764 | } | |
5765 | ||
5766 | ||
4ee9c684 | 5767 | /* Match a module procedure statement. Note that we have to modify |
5768 | symbols in the parent's namespace because the current one was there | |
89d91d02 | 5769 | to receive symbols that are in an interface's formal argument list. */ |
4ee9c684 | 5770 | |
5771 | match | |
5772 | gfc_match_modproc (void) | |
5773 | { | |
5774 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5775 | gfc_symbol *sym; | |
5776 | match m; | |
63d42079 | 5777 | gfc_namespace *module_ns; |
4ee9c684 | 5778 | |
5779 | if (gfc_state_stack->state != COMP_INTERFACE | |
5780 | || gfc_state_stack->previous == NULL | |
5cf92482 | 5781 | || current_interface.type == INTERFACE_NAMELESS |
5782 | || current_interface.type == INTERFACE_ABSTRACT) | |
4ee9c684 | 5783 | { |
1a9745d2 | 5784 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
5785 | "interface"); | |
4ee9c684 | 5786 | return MATCH_ERROR; |
5787 | } | |
5788 | ||
63d42079 | 5789 | module_ns = gfc_current_ns->parent; |
5790 | for (; module_ns; module_ns = module_ns->parent) | |
5791 | if (module_ns->proc_name->attr.flavor == FL_MODULE) | |
5792 | break; | |
5793 | ||
5794 | if (module_ns == NULL) | |
5795 | return MATCH_ERROR; | |
5796 | ||
4ee9c684 | 5797 | for (;;) |
5798 | { | |
5799 | m = gfc_match_name (name); | |
5800 | if (m == MATCH_NO) | |
5801 | goto syntax; | |
5802 | if (m != MATCH_YES) | |
5803 | return MATCH_ERROR; | |
5804 | ||
63d42079 | 5805 | if (gfc_get_symbol (name, module_ns, &sym)) |
4ee9c684 | 5806 | return MATCH_ERROR; |
5807 | ||
5808 | if (sym->attr.proc != PROC_MODULE | |
950683ed | 5809 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
5810 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 5811 | return MATCH_ERROR; |
5812 | ||
5813 | if (gfc_add_interface (sym) == FAILURE) | |
5814 | return MATCH_ERROR; | |
5815 | ||
3186f695 | 5816 | sym->attr.mod_proc = 1; |
5817 | ||
4ee9c684 | 5818 | if (gfc_match_eos () == MATCH_YES) |
5819 | break; | |
5820 | if (gfc_match_char (',') != MATCH_YES) | |
5821 | goto syntax; | |
5822 | } | |
5823 | ||
5824 | return MATCH_YES; | |
5825 | ||
5826 | syntax: | |
5827 | gfc_syntax_error (ST_MODULE_PROC); | |
5828 | return MATCH_ERROR; | |
5829 | } | |
5830 | ||
5831 | ||
c5d33754 | 5832 | /* Match the optional attribute specifiers for a type declaration. |
5833 | Return MATCH_ERROR if an error is encountered in one of the handled | |
5834 | attributes (public, private, bind(c)), MATCH_NO if what's found is | |
5835 | not a handled attribute, and MATCH_YES otherwise. TODO: More error | |
5836 | checking on attribute conflicts needs to be done. */ | |
4ee9c684 | 5837 | |
5838 | match | |
c5d33754 | 5839 | gfc_get_type_attr_spec (symbol_attribute *attr) |
4ee9c684 | 5840 | { |
c5d33754 | 5841 | /* See if the derived type is marked as private. */ |
4ee9c684 | 5842 | if (gfc_match (" , private") == MATCH_YES) |
5843 | { | |
e14bee04 | 5844 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 5845 | { |
e14bee04 | 5846 | gfc_error ("Derived type at %C can only be PRIVATE in the " |
5847 | "specification part of a module"); | |
4ee9c684 | 5848 | return MATCH_ERROR; |
5849 | } | |
5850 | ||
c5d33754 | 5851 | if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
4ee9c684 | 5852 | return MATCH_ERROR; |
4ee9c684 | 5853 | } |
c5d33754 | 5854 | else if (gfc_match (" , public") == MATCH_YES) |
4ee9c684 | 5855 | { |
e14bee04 | 5856 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 5857 | { |
e14bee04 | 5858 | gfc_error ("Derived type at %C can only be PUBLIC in the " |
5859 | "specification part of a module"); | |
4ee9c684 | 5860 | return MATCH_ERROR; |
5861 | } | |
5862 | ||
c5d33754 | 5863 | if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
4ee9c684 | 5864 | return MATCH_ERROR; |
4ee9c684 | 5865 | } |
33e86520 | 5866 | else if (gfc_match(" , bind ( c )") == MATCH_YES) |
c5d33754 | 5867 | { |
5868 | /* If the type is defined to be bind(c) it then needs to make | |
5869 | sure that all fields are interoperable. This will | |
5870 | need to be a semantic check on the finished derived type. | |
5871 | See 15.2.3 (lines 9-12) of F2003 draft. */ | |
5872 | if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) | |
5873 | return MATCH_ERROR; | |
5874 | ||
5875 | /* TODO: attr conflicts need to be checked, probably in symbol.c. */ | |
5876 | } | |
5877 | else | |
5878 | return MATCH_NO; | |
5879 | ||
5880 | /* If we get here, something matched. */ | |
5881 | return MATCH_YES; | |
5882 | } | |
5883 | ||
5884 | ||
5885 | /* Match the beginning of a derived type declaration. If a type name | |
5886 | was the result of a function, then it is possible to have a symbol | |
5887 | already to be known as a derived type yet have no components. */ | |
5888 | ||
5889 | match | |
5890 | gfc_match_derived_decl (void) | |
5891 | { | |
5892 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5893 | symbol_attribute attr; | |
5894 | gfc_symbol *sym; | |
5895 | match m; | |
5896 | match is_type_attr_spec = MATCH_NO; | |
33e86520 | 5897 | bool seen_attr = false; |
c5d33754 | 5898 | |
5899 | if (gfc_current_state () == COMP_DERIVED) | |
5900 | return MATCH_NO; | |
5901 | ||
5902 | gfc_clear_attr (&attr); | |
5903 | ||
5904 | do | |
5905 | { | |
5906 | is_type_attr_spec = gfc_get_type_attr_spec (&attr); | |
5907 | if (is_type_attr_spec == MATCH_ERROR) | |
5908 | return MATCH_ERROR; | |
33e86520 | 5909 | if (is_type_attr_spec == MATCH_YES) |
5910 | seen_attr = true; | |
c5d33754 | 5911 | } while (is_type_attr_spec == MATCH_YES); |
4ee9c684 | 5912 | |
33e86520 | 5913 | if (gfc_match (" ::") != MATCH_YES && seen_attr) |
4ee9c684 | 5914 | { |
5915 | gfc_error ("Expected :: in TYPE definition at %C"); | |
5916 | return MATCH_ERROR; | |
5917 | } | |
5918 | ||
5919 | m = gfc_match (" %n%t", name); | |
5920 | if (m != MATCH_YES) | |
5921 | return m; | |
5922 | ||
a3055431 | 5923 | /* Make sure the name is not the name of an intrinsic type. */ |
5924 | if (gfc_is_intrinsic_typename (name)) | |
4ee9c684 | 5925 | { |
1a9745d2 | 5926 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
5927 | "type", name); | |
4ee9c684 | 5928 | return MATCH_ERROR; |
5929 | } | |
5930 | ||
5931 | if (gfc_get_symbol (name, NULL, &sym)) | |
5932 | return MATCH_ERROR; | |
5933 | ||
5934 | if (sym->ts.type != BT_UNKNOWN) | |
5935 | { | |
5936 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
5937 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
5938 | return MATCH_ERROR; | |
5939 | } | |
5940 | ||
5941 | /* The symbol may already have the derived attribute without the | |
5942 | components. The ways this can happen is via a function | |
5943 | definition, an INTRINSIC statement or a subtype in another | |
5944 | derived type that is a pointer. The first part of the AND clause | |
b14e2757 | 5945 | is true if a the symbol is not the return value of a function. */ |
4ee9c684 | 5946 | if (sym->attr.flavor != FL_DERIVED |
950683ed | 5947 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 5948 | return MATCH_ERROR; |
5949 | ||
e6b82afc | 5950 | if (sym->components != NULL || sym->attr.zero_comp) |
4ee9c684 | 5951 | { |
1a9745d2 | 5952 | gfc_error ("Derived type definition of '%s' at %C has already been " |
5953 | "defined", sym->name); | |
4ee9c684 | 5954 | return MATCH_ERROR; |
5955 | } | |
5956 | ||
5957 | if (attr.access != ACCESS_UNKNOWN | |
950683ed | 5958 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
4ee9c684 | 5959 | return MATCH_ERROR; |
5960 | ||
c5d33754 | 5961 | /* See if the derived type was labeled as bind(c). */ |
5962 | if (attr.is_bind_c != 0) | |
5963 | sym->attr.is_bind_c = attr.is_bind_c; | |
5964 | ||
4ee9c684 | 5965 | gfc_new_block = sym; |
5966 | ||
5967 | return MATCH_YES; | |
5968 | } | |
b549d2a5 | 5969 | |
5970 | ||
5971 | /* Cray Pointees can be declared as: | |
5972 | pointer (ipt, a (n,m,...,*)) | |
5973 | By default, this is treated as an AS_ASSUMED_SIZE array. We'll | |
5974 | cheat and set a constant bound of 1 for the last dimension, if this | |
5975 | is the case. Since there is no bounds-checking for Cray Pointees, | |
5976 | this will be okay. */ | |
5977 | ||
5978 | try | |
5979 | gfc_mod_pointee_as (gfc_array_spec *as) | |
5980 | { | |
5981 | as->cray_pointee = true; /* This will be useful to know later. */ | |
5982 | if (as->type == AS_ASSUMED_SIZE) | |
5983 | { | |
5984 | as->type = AS_EXPLICIT; | |
5985 | as->upper[as->rank - 1] = gfc_int_expr (1); | |
5986 | as->cp_was_assumed = true; | |
5987 | } | |
5988 | else if (as->type == AS_ASSUMED_SHAPE) | |
5989 | { | |
5990 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
5991 | return MATCH_ERROR; | |
5992 | } | |
5993 | return MATCH_YES; | |
5994 | } | |
3b6a4b41 | 5995 | |
5996 | ||
5997 | /* Match the enum definition statement, here we are trying to match | |
5998 | the first line of enum definition statement. | |
5999 | Returns MATCH_YES if match is found. */ | |
6000 | ||
6001 | match | |
6002 | gfc_match_enum (void) | |
6003 | { | |
6004 | match m; | |
6005 | ||
6006 | m = gfc_match_eos (); | |
6007 | if (m != MATCH_YES) | |
6008 | return m; | |
6009 | ||
60fbbf9e | 6010 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") |
3b6a4b41 | 6011 | == FAILURE) |
6012 | return MATCH_ERROR; | |
6013 | ||
6014 | return MATCH_YES; | |
6015 | } | |
6016 | ||
6017 | ||
60fbbf9e | 6018 | /* Match a variable name with an optional initializer. When this |
6019 | subroutine is called, a variable is expected to be parsed next. | |
6020 | Depending on what is happening at the moment, updates either the | |
6021 | symbol table or the current interface. */ | |
6022 | ||
6023 | static match | |
6024 | enumerator_decl (void) | |
6025 | { | |
6026 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6027 | gfc_expr *initializer; | |
6028 | gfc_array_spec *as = NULL; | |
6029 | gfc_symbol *sym; | |
6030 | locus var_locus; | |
6031 | match m; | |
6032 | try t; | |
6033 | locus old_locus; | |
6034 | ||
6035 | initializer = NULL; | |
6036 | old_locus = gfc_current_locus; | |
6037 | ||
6038 | /* When we get here, we've just matched a list of attributes and | |
6039 | maybe a type and a double colon. The next thing we expect to see | |
6040 | is the name of the symbol. */ | |
6041 | m = gfc_match_name (name); | |
6042 | if (m != MATCH_YES) | |
6043 | goto cleanup; | |
6044 | ||
6045 | var_locus = gfc_current_locus; | |
6046 | ||
6047 | /* OK, we've successfully matched the declaration. Now put the | |
6048 | symbol in the current namespace. If we fail to create the symbol, | |
6049 | bail out. */ | |
6050 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
6051 | { | |
6052 | m = MATCH_ERROR; | |
6053 | goto cleanup; | |
6054 | } | |
6055 | ||
6056 | /* The double colon must be present in order to have initializers. | |
6057 | Otherwise the statement is ambiguous with an assignment statement. */ | |
6058 | if (colon_seen) | |
6059 | { | |
6060 | if (gfc_match_char ('=') == MATCH_YES) | |
6061 | { | |
6062 | m = gfc_match_init_expr (&initializer); | |
6063 | if (m == MATCH_NO) | |
6064 | { | |
6065 | gfc_error ("Expected an initialization expression at %C"); | |
6066 | m = MATCH_ERROR; | |
6067 | } | |
6068 | ||
6069 | if (m != MATCH_YES) | |
6070 | goto cleanup; | |
6071 | } | |
6072 | } | |
6073 | ||
6074 | /* If we do not have an initializer, the initialization value of the | |
6075 | previous enumerator (stored in last_initializer) is incremented | |
6076 | by 1 and is used to initialize the current enumerator. */ | |
6077 | if (initializer == NULL) | |
6078 | initializer = gfc_enum_initializer (last_initializer, old_locus); | |
e14bee04 | 6079 | |
60fbbf9e | 6080 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
6081 | { | |
6082 | gfc_error("ENUMERATOR %L not initialized with integer expression", | |
6083 | &var_locus); | |
e14bee04 | 6084 | m = MATCH_ERROR; |
60fbbf9e | 6085 | gfc_free_enum_history (); |
6086 | goto cleanup; | |
6087 | } | |
6088 | ||
6089 | /* Store this current initializer, for the next enumerator variable | |
6090 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
6091 | use last_initializer below. */ | |
6092 | last_initializer = initializer; | |
6093 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
6094 | ||
6095 | /* Maintain enumerator history. */ | |
6096 | gfc_find_symbol (name, NULL, 0, &sym); | |
6097 | create_enum_history (sym, last_initializer); | |
6098 | ||
6099 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
6100 | ||
6101 | cleanup: | |
6102 | /* Free stuff up and return. */ | |
6103 | gfc_free_expr (initializer); | |
6104 | ||
6105 | return m; | |
6106 | } | |
6107 | ||
6108 | ||
f6d0e37a | 6109 | /* Match the enumerator definition statement. */ |
3b6a4b41 | 6110 | |
6111 | match | |
6112 | gfc_match_enumerator_def (void) | |
6113 | { | |
6114 | match m; | |
60fbbf9e | 6115 | try t; |
e14bee04 | 6116 | |
3b6a4b41 | 6117 | gfc_clear_ts (¤t_ts); |
e14bee04 | 6118 | |
3b6a4b41 | 6119 | m = gfc_match (" enumerator"); |
6120 | if (m != MATCH_YES) | |
6121 | return m; | |
60fbbf9e | 6122 | |
6123 | m = gfc_match (" :: "); | |
6124 | if (m == MATCH_ERROR) | |
6125 | return m; | |
6126 | ||
6127 | colon_seen = (m == MATCH_YES); | |
e14bee04 | 6128 | |
3b6a4b41 | 6129 | if (gfc_current_state () != COMP_ENUM) |
6130 | { | |
6131 | gfc_error ("ENUM definition statement expected before %C"); | |
6132 | gfc_free_enum_history (); | |
6133 | return MATCH_ERROR; | |
6134 | } | |
6135 | ||
6136 | (¤t_ts)->type = BT_INTEGER; | |
6137 | (¤t_ts)->kind = gfc_c_int_kind; | |
e14bee04 | 6138 | |
60fbbf9e | 6139 | gfc_clear_attr (¤t_attr); |
6140 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
6141 | if (t == FAILURE) | |
3b6a4b41 | 6142 | { |
60fbbf9e | 6143 | m = MATCH_ERROR; |
3b6a4b41 | 6144 | goto cleanup; |
6145 | } | |
6146 | ||
3b6a4b41 | 6147 | for (;;) |
6148 | { | |
60fbbf9e | 6149 | m = enumerator_decl (); |
3b6a4b41 | 6150 | if (m == MATCH_ERROR) |
6151 | goto cleanup; | |
6152 | if (m == MATCH_NO) | |
6153 | break; | |
6154 | ||
6155 | if (gfc_match_eos () == MATCH_YES) | |
6156 | goto cleanup; | |
6157 | if (gfc_match_char (',') != MATCH_YES) | |
6158 | break; | |
6159 | } | |
6160 | ||
6161 | if (gfc_current_state () == COMP_ENUM) | |
6162 | { | |
6163 | gfc_free_enum_history (); | |
6164 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
6165 | m = MATCH_ERROR; | |
6166 | } | |
6167 | ||
6168 | cleanup: | |
6169 | gfc_free_array_spec (current_as); | |
6170 | current_as = NULL; | |
6171 | return m; | |
6172 | ||
6173 | } | |
6174 |