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Commit | Line | Data |
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6de9cd9a | 1 | /* Declaration statement matcher |
636dff67 SK |
2 | Copyright (C) 2002, 2004, 2005, 2006, 2007 |
3 | Free Software Foundation, Inc. | |
6de9cd9a DN |
4 | Contributed by Andy Vaught |
5 | ||
9fc4d79b | 6 | This file is part of GCC. |
6de9cd9a | 7 | |
9fc4d79b TS |
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 | |
d234d788 | 10 | Software Foundation; either version 3, or (at your option) any later |
9fc4d79b | 11 | version. |
6de9cd9a | 12 | |
9fc4d79b TS |
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. | |
6de9cd9a DN |
17 | |
18 | You should have received a copy of the GNU General Public License | |
d234d788 NC |
19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a | 21 | |
6de9cd9a | 22 | #include "config.h" |
d22e4895 | 23 | #include "system.h" |
6de9cd9a DN |
24 | #include "gfortran.h" |
25 | #include "match.h" | |
26 | #include "parse.h" | |
6de9cd9a | 27 | |
2054fc29 | 28 | /* This flag is set if an old-style length selector is matched |
6de9cd9a DN |
29 | during a type-declaration statement. */ |
30 | ||
31 | static int old_char_selector; | |
32 | ||
46fa431d | 33 | /* When variables acquire types and attributes from a declaration |
6de9cd9a DN |
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 | ||
a8b3b0b6 CR |
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 | ||
25d8f0a2 TS |
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 | ||
6de9cd9a DN |
77 | /* gfc_new_block points to the symbol of a newly matched block. */ |
78 | ||
79 | gfc_symbol *gfc_new_block; | |
80 | ||
81 | ||
294fbfc8 TS |
82 | /********************* DATA statement subroutines *********************/ |
83 | ||
2220652d PT |
84 | static bool in_match_data = false; |
85 | ||
86 | bool | |
87 | gfc_in_match_data (void) | |
88 | { | |
89 | return in_match_data; | |
90 | } | |
91 | ||
92 | void | |
93 | gfc_set_in_match_data (bool set_value) | |
94 | { | |
95 | in_match_data = set_value; | |
96 | } | |
97 | ||
294fbfc8 TS |
98 | /* Free a gfc_data_variable structure and everything beneath it. */ |
99 | ||
100 | static void | |
636dff67 | 101 | free_variable (gfc_data_variable *p) |
294fbfc8 TS |
102 | { |
103 | gfc_data_variable *q; | |
104 | ||
105 | for (; p; p = q) | |
106 | { | |
107 | q = p->next; | |
108 | gfc_free_expr (p->expr); | |
109 | gfc_free_iterator (&p->iter, 0); | |
110 | free_variable (p->list); | |
294fbfc8 TS |
111 | gfc_free (p); |
112 | } | |
113 | } | |
114 | ||
115 | ||
116 | /* Free a gfc_data_value structure and everything beneath it. */ | |
117 | ||
118 | static void | |
636dff67 | 119 | free_value (gfc_data_value *p) |
294fbfc8 TS |
120 | { |
121 | gfc_data_value *q; | |
122 | ||
123 | for (; p; p = q) | |
124 | { | |
125 | q = p->next; | |
126 | gfc_free_expr (p->expr); | |
127 | gfc_free (p); | |
128 | } | |
129 | } | |
130 | ||
131 | ||
132 | /* Free a list of gfc_data structures. */ | |
133 | ||
134 | void | |
636dff67 | 135 | gfc_free_data (gfc_data *p) |
294fbfc8 TS |
136 | { |
137 | gfc_data *q; | |
138 | ||
139 | for (; p; p = q) | |
140 | { | |
141 | q = p->next; | |
294fbfc8 TS |
142 | free_variable (p->var); |
143 | free_value (p->value); | |
294fbfc8 TS |
144 | gfc_free (p); |
145 | } | |
146 | } | |
147 | ||
148 | ||
a9f6f1f2 | 149 | /* Free all data in a namespace. */ |
636dff67 | 150 | |
a9f6f1f2 | 151 | static void |
66e4ab31 | 152 | gfc_free_data_all (gfc_namespace *ns) |
a9f6f1f2 JD |
153 | { |
154 | gfc_data *d; | |
155 | ||
156 | for (;ns->data;) | |
157 | { | |
158 | d = ns->data->next; | |
159 | gfc_free (ns->data); | |
160 | ns->data = d; | |
161 | } | |
162 | } | |
163 | ||
164 | ||
294fbfc8 TS |
165 | static match var_element (gfc_data_variable *); |
166 | ||
167 | /* Match a list of variables terminated by an iterator and a right | |
168 | parenthesis. */ | |
169 | ||
170 | static match | |
636dff67 | 171 | var_list (gfc_data_variable *parent) |
294fbfc8 TS |
172 | { |
173 | gfc_data_variable *tail, var; | |
174 | match m; | |
175 | ||
176 | m = var_element (&var); | |
177 | if (m == MATCH_ERROR) | |
178 | return MATCH_ERROR; | |
179 | if (m == MATCH_NO) | |
180 | goto syntax; | |
181 | ||
182 | tail = gfc_get_data_variable (); | |
183 | *tail = var; | |
184 | ||
185 | parent->list = tail; | |
186 | ||
187 | for (;;) | |
188 | { | |
189 | if (gfc_match_char (',') != MATCH_YES) | |
190 | goto syntax; | |
191 | ||
192 | m = gfc_match_iterator (&parent->iter, 1); | |
193 | if (m == MATCH_YES) | |
194 | break; | |
195 | if (m == MATCH_ERROR) | |
196 | return MATCH_ERROR; | |
197 | ||
198 | m = var_element (&var); | |
199 | if (m == MATCH_ERROR) | |
200 | return MATCH_ERROR; | |
201 | if (m == MATCH_NO) | |
202 | goto syntax; | |
203 | ||
204 | tail->next = gfc_get_data_variable (); | |
205 | tail = tail->next; | |
206 | ||
207 | *tail = var; | |
208 | } | |
209 | ||
210 | if (gfc_match_char (')') != MATCH_YES) | |
211 | goto syntax; | |
212 | return MATCH_YES; | |
213 | ||
214 | syntax: | |
215 | gfc_syntax_error (ST_DATA); | |
216 | return MATCH_ERROR; | |
217 | } | |
218 | ||
219 | ||
220 | /* Match a single element in a data variable list, which can be a | |
221 | variable-iterator list. */ | |
222 | ||
223 | static match | |
636dff67 | 224 | var_element (gfc_data_variable *new) |
294fbfc8 TS |
225 | { |
226 | match m; | |
227 | gfc_symbol *sym; | |
228 | ||
229 | memset (new, 0, sizeof (gfc_data_variable)); | |
230 | ||
231 | if (gfc_match_char ('(') == MATCH_YES) | |
232 | return var_list (new); | |
233 | ||
234 | m = gfc_match_variable (&new->expr, 0); | |
235 | if (m != MATCH_YES) | |
236 | return m; | |
237 | ||
238 | sym = new->expr->symtree->n.sym; | |
239 | ||
636dff67 SK |
240 | if (!sym->attr.function && gfc_current_ns->parent |
241 | && gfc_current_ns->parent == sym->ns) | |
294fbfc8 | 242 | { |
4075a94e | 243 | gfc_error ("Host associated variable '%s' may not be in the DATA " |
e25a0da3 | 244 | "statement at %C", sym->name); |
294fbfc8 TS |
245 | return MATCH_ERROR; |
246 | } | |
247 | ||
4075a94e | 248 | if (gfc_current_state () != COMP_BLOCK_DATA |
636dff67 SK |
249 | && sym->attr.in_common |
250 | && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of " | |
251 | "common block variable '%s' in DATA statement at %C", | |
252 | sym->name) == FAILURE) | |
4075a94e | 253 | return MATCH_ERROR; |
294fbfc8 | 254 | |
231b2fcc | 255 | if (gfc_add_data (&sym->attr, sym->name, &new->expr->where) == FAILURE) |
294fbfc8 TS |
256 | return MATCH_ERROR; |
257 | ||
258 | return MATCH_YES; | |
259 | } | |
260 | ||
261 | ||
262 | /* Match the top-level list of data variables. */ | |
263 | ||
264 | static match | |
636dff67 | 265 | top_var_list (gfc_data *d) |
294fbfc8 TS |
266 | { |
267 | gfc_data_variable var, *tail, *new; | |
268 | match m; | |
269 | ||
270 | tail = NULL; | |
271 | ||
272 | for (;;) | |
273 | { | |
274 | m = var_element (&var); | |
275 | if (m == MATCH_NO) | |
276 | goto syntax; | |
277 | if (m == MATCH_ERROR) | |
278 | return MATCH_ERROR; | |
279 | ||
280 | new = gfc_get_data_variable (); | |
281 | *new = var; | |
282 | ||
283 | if (tail == NULL) | |
284 | d->var = new; | |
285 | else | |
286 | tail->next = new; | |
287 | ||
288 | tail = new; | |
289 | ||
290 | if (gfc_match_char ('/') == MATCH_YES) | |
291 | break; | |
292 | if (gfc_match_char (',') != MATCH_YES) | |
293 | goto syntax; | |
294 | } | |
295 | ||
296 | return MATCH_YES; | |
297 | ||
298 | syntax: | |
299 | gfc_syntax_error (ST_DATA); | |
a9f6f1f2 | 300 | gfc_free_data_all (gfc_current_ns); |
294fbfc8 TS |
301 | return MATCH_ERROR; |
302 | } | |
303 | ||
304 | ||
305 | static match | |
636dff67 | 306 | match_data_constant (gfc_expr **result) |
294fbfc8 TS |
307 | { |
308 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
309 | gfc_symbol *sym; | |
310 | gfc_expr *expr; | |
311 | match m; | |
36d3fb4c | 312 | locus old_loc; |
294fbfc8 TS |
313 | |
314 | m = gfc_match_literal_constant (&expr, 1); | |
315 | if (m == MATCH_YES) | |
316 | { | |
317 | *result = expr; | |
318 | return MATCH_YES; | |
319 | } | |
320 | ||
321 | if (m == MATCH_ERROR) | |
322 | return MATCH_ERROR; | |
323 | ||
324 | m = gfc_match_null (result); | |
325 | if (m != MATCH_NO) | |
326 | return m; | |
327 | ||
36d3fb4c PT |
328 | old_loc = gfc_current_locus; |
329 | ||
330 | /* Should this be a structure component, try to match it | |
331 | before matching a name. */ | |
332 | m = gfc_match_rvalue (result); | |
333 | if (m == MATCH_ERROR) | |
334 | return m; | |
335 | ||
336 | if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE) | |
337 | { | |
338 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
339 | m = MATCH_ERROR; | |
340 | return m; | |
341 | } | |
342 | ||
343 | gfc_current_locus = old_loc; | |
344 | ||
294fbfc8 TS |
345 | m = gfc_match_name (name); |
346 | if (m != MATCH_YES) | |
347 | return m; | |
348 | ||
349 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
350 | return MATCH_ERROR; | |
351 | ||
352 | if (sym == NULL | |
353 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
354 | { | |
355 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
356 | name); | |
357 | return MATCH_ERROR; | |
358 | } | |
359 | else if (sym->attr.flavor == FL_DERIVED) | |
360 | return gfc_match_structure_constructor (sym, result); | |
361 | ||
362 | *result = gfc_copy_expr (sym->value); | |
363 | return MATCH_YES; | |
364 | } | |
365 | ||
366 | ||
367 | /* Match a list of values in a DATA statement. The leading '/' has | |
368 | already been seen at this point. */ | |
369 | ||
370 | static match | |
636dff67 | 371 | top_val_list (gfc_data *data) |
294fbfc8 TS |
372 | { |
373 | gfc_data_value *new, *tail; | |
374 | gfc_expr *expr; | |
375 | const char *msg; | |
376 | match m; | |
377 | ||
378 | tail = NULL; | |
379 | ||
380 | for (;;) | |
381 | { | |
382 | m = match_data_constant (&expr); | |
383 | if (m == MATCH_NO) | |
384 | goto syntax; | |
385 | if (m == MATCH_ERROR) | |
386 | return MATCH_ERROR; | |
387 | ||
388 | new = gfc_get_data_value (); | |
389 | ||
390 | if (tail == NULL) | |
391 | data->value = new; | |
392 | else | |
393 | tail->next = new; | |
394 | ||
395 | tail = new; | |
396 | ||
397 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
398 | { | |
399 | tail->expr = expr; | |
400 | tail->repeat = 1; | |
401 | } | |
402 | else | |
403 | { | |
404 | signed int tmp; | |
405 | msg = gfc_extract_int (expr, &tmp); | |
406 | gfc_free_expr (expr); | |
407 | if (msg != NULL) | |
408 | { | |
409 | gfc_error (msg); | |
410 | return MATCH_ERROR; | |
411 | } | |
412 | tail->repeat = tmp; | |
413 | ||
414 | m = match_data_constant (&tail->expr); | |
415 | if (m == MATCH_NO) | |
416 | goto syntax; | |
417 | if (m == MATCH_ERROR) | |
418 | return MATCH_ERROR; | |
419 | } | |
420 | ||
421 | if (gfc_match_char ('/') == MATCH_YES) | |
422 | break; | |
423 | if (gfc_match_char (',') == MATCH_NO) | |
424 | goto syntax; | |
425 | } | |
426 | ||
427 | return MATCH_YES; | |
428 | ||
429 | syntax: | |
430 | gfc_syntax_error (ST_DATA); | |
a9f6f1f2 | 431 | gfc_free_data_all (gfc_current_ns); |
294fbfc8 TS |
432 | return MATCH_ERROR; |
433 | } | |
434 | ||
435 | ||
436 | /* Matches an old style initialization. */ | |
437 | ||
438 | static match | |
439 | match_old_style_init (const char *name) | |
440 | { | |
441 | match m; | |
442 | gfc_symtree *st; | |
ed0e3607 | 443 | gfc_symbol *sym; |
294fbfc8 TS |
444 | gfc_data *newdata; |
445 | ||
446 | /* Set up data structure to hold initializers. */ | |
447 | gfc_find_sym_tree (name, NULL, 0, &st); | |
ed0e3607 AL |
448 | sym = st->n.sym; |
449 | ||
294fbfc8 TS |
450 | newdata = gfc_get_data (); |
451 | newdata->var = gfc_get_data_variable (); | |
452 | newdata->var->expr = gfc_get_variable_expr (st); | |
8c5c0b80 | 453 | newdata->where = gfc_current_locus; |
294fbfc8 | 454 | |
66e4ab31 | 455 | /* Match initial value list. This also eats the terminal '/'. */ |
294fbfc8 TS |
456 | m = top_val_list (newdata); |
457 | if (m != MATCH_YES) | |
458 | { | |
459 | gfc_free (newdata); | |
460 | return m; | |
461 | } | |
462 | ||
463 | if (gfc_pure (NULL)) | |
464 | { | |
465 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
466 | gfc_free (newdata); | |
467 | return MATCH_ERROR; | |
468 | } | |
469 | ||
ed0e3607 AL |
470 | /* Mark the variable as having appeared in a data statement. */ |
471 | if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) | |
472 | { | |
473 | gfc_free (newdata); | |
474 | return MATCH_ERROR; | |
475 | } | |
476 | ||
294fbfc8 TS |
477 | /* Chain in namespace list of DATA initializers. */ |
478 | newdata->next = gfc_current_ns->data; | |
479 | gfc_current_ns->data = newdata; | |
480 | ||
481 | return m; | |
482 | } | |
483 | ||
636dff67 | 484 | |
294fbfc8 | 485 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
13795658 | 486 | we are matching a DATA statement and are therefore issuing an error |
d51347f9 | 487 | if we encounter something unexpected, if not, we're trying to match |
69de3b83 | 488 | an old-style initialization expression of the form INTEGER I /2/. */ |
294fbfc8 TS |
489 | |
490 | match | |
491 | gfc_match_data (void) | |
492 | { | |
493 | gfc_data *new; | |
494 | match m; | |
495 | ||
2220652d PT |
496 | gfc_set_in_match_data (true); |
497 | ||
294fbfc8 TS |
498 | for (;;) |
499 | { | |
500 | new = gfc_get_data (); | |
501 | new->where = gfc_current_locus; | |
502 | ||
503 | m = top_var_list (new); | |
504 | if (m != MATCH_YES) | |
505 | goto cleanup; | |
506 | ||
507 | m = top_val_list (new); | |
508 | if (m != MATCH_YES) | |
509 | goto cleanup; | |
510 | ||
511 | new->next = gfc_current_ns->data; | |
512 | gfc_current_ns->data = new; | |
513 | ||
514 | if (gfc_match_eos () == MATCH_YES) | |
515 | break; | |
516 | ||
517 | gfc_match_char (','); /* Optional comma */ | |
518 | } | |
519 | ||
2220652d PT |
520 | gfc_set_in_match_data (false); |
521 | ||
294fbfc8 TS |
522 | if (gfc_pure (NULL)) |
523 | { | |
524 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
525 | return MATCH_ERROR; | |
526 | } | |
527 | ||
528 | return MATCH_YES; | |
529 | ||
530 | cleanup: | |
2220652d | 531 | gfc_set_in_match_data (false); |
294fbfc8 TS |
532 | gfc_free_data (new); |
533 | return MATCH_ERROR; | |
534 | } | |
535 | ||
536 | ||
537 | /************************ Declaration statements *********************/ | |
538 | ||
6de9cd9a DN |
539 | /* Match an intent specification. Since this can only happen after an |
540 | INTENT word, a legal intent-spec must follow. */ | |
541 | ||
542 | static sym_intent | |
543 | match_intent_spec (void) | |
544 | { | |
545 | ||
546 | if (gfc_match (" ( in out )") == MATCH_YES) | |
547 | return INTENT_INOUT; | |
548 | if (gfc_match (" ( in )") == MATCH_YES) | |
549 | return INTENT_IN; | |
550 | if (gfc_match (" ( out )") == MATCH_YES) | |
551 | return INTENT_OUT; | |
552 | ||
553 | gfc_error ("Bad INTENT specification at %C"); | |
554 | return INTENT_UNKNOWN; | |
555 | } | |
556 | ||
557 | ||
558 | /* Matches a character length specification, which is either a | |
559 | specification expression or a '*'. */ | |
560 | ||
561 | static match | |
636dff67 | 562 | char_len_param_value (gfc_expr **expr) |
6de9cd9a | 563 | { |
6de9cd9a DN |
564 | if (gfc_match_char ('*') == MATCH_YES) |
565 | { | |
566 | *expr = NULL; | |
567 | return MATCH_YES; | |
568 | } | |
569 | ||
570 | return gfc_match_expr (expr); | |
571 | } | |
572 | ||
573 | ||
574 | /* A character length is a '*' followed by a literal integer or a | |
575 | char_len_param_value in parenthesis. */ | |
576 | ||
577 | static match | |
636dff67 | 578 | match_char_length (gfc_expr **expr) |
6de9cd9a | 579 | { |
5cf54585 | 580 | int length; |
6de9cd9a DN |
581 | match m; |
582 | ||
583 | m = gfc_match_char ('*'); | |
584 | if (m != MATCH_YES) | |
585 | return m; | |
586 | ||
5cf54585 | 587 | m = gfc_match_small_literal_int (&length, NULL); |
6de9cd9a DN |
588 | if (m == MATCH_ERROR) |
589 | return m; | |
590 | ||
591 | if (m == MATCH_YES) | |
592 | { | |
593 | *expr = gfc_int_expr (length); | |
594 | return m; | |
595 | } | |
596 | ||
597 | if (gfc_match_char ('(') == MATCH_NO) | |
598 | goto syntax; | |
599 | ||
600 | m = char_len_param_value (expr); | |
601 | if (m == MATCH_ERROR) | |
602 | return m; | |
603 | if (m == MATCH_NO) | |
604 | goto syntax; | |
605 | ||
606 | if (gfc_match_char (')') == MATCH_NO) | |
607 | { | |
608 | gfc_free_expr (*expr); | |
609 | *expr = NULL; | |
610 | goto syntax; | |
611 | } | |
612 | ||
613 | return MATCH_YES; | |
614 | ||
615 | syntax: | |
616 | gfc_error ("Syntax error in character length specification at %C"); | |
617 | return MATCH_ERROR; | |
618 | } | |
619 | ||
620 | ||
9e35b386 EE |
621 | /* Special subroutine for finding a symbol. Check if the name is found |
622 | in the current name space. If not, and we're compiling a function or | |
623 | subroutine and the parent compilation unit is an interface, then check | |
624 | to see if the name we've been given is the name of the interface | |
625 | (located in another namespace). */ | |
6de9cd9a DN |
626 | |
627 | static int | |
636dff67 | 628 | find_special (const char *name, gfc_symbol **result) |
6de9cd9a DN |
629 | { |
630 | gfc_state_data *s; | |
9e35b386 | 631 | int i; |
6de9cd9a | 632 | |
9e35b386 | 633 | i = gfc_get_symbol (name, NULL, result); |
d51347f9 | 634 | if (i == 0) |
9e35b386 | 635 | goto end; |
d51347f9 | 636 | |
6de9cd9a DN |
637 | if (gfc_current_state () != COMP_SUBROUTINE |
638 | && gfc_current_state () != COMP_FUNCTION) | |
9e35b386 | 639 | goto end; |
6de9cd9a DN |
640 | |
641 | s = gfc_state_stack->previous; | |
642 | if (s == NULL) | |
9e35b386 | 643 | goto end; |
6de9cd9a DN |
644 | |
645 | if (s->state != COMP_INTERFACE) | |
9e35b386 | 646 | goto end; |
6de9cd9a | 647 | if (s->sym == NULL) |
66e4ab31 | 648 | goto end; /* Nameless interface. */ |
6de9cd9a DN |
649 | |
650 | if (strcmp (name, s->sym->name) == 0) | |
651 | { | |
652 | *result = s->sym; | |
653 | return 0; | |
654 | } | |
655 | ||
9e35b386 EE |
656 | end: |
657 | return i; | |
6de9cd9a DN |
658 | } |
659 | ||
660 | ||
661 | /* Special subroutine for getting a symbol node associated with a | |
662 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
663 | symbol is created in the parent using with symtree node in the | |
664 | child unit pointing to the symbol. If the current namespace has no | |
665 | parent, then the symbol is just created in the current unit. */ | |
666 | ||
667 | static int | |
636dff67 | 668 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
6de9cd9a DN |
669 | { |
670 | gfc_symtree *st; | |
671 | gfc_symbol *sym; | |
672 | int rc; | |
673 | ||
1a492601 PT |
674 | /* Module functions have to be left in their own namespace because |
675 | they have potentially (almost certainly!) already been referenced. | |
676 | In this sense, they are rather like external functions. This is | |
677 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
678 | space is set to point to the master function, so that the fake | |
679 | result mechanism can work. */ | |
680 | if (module_fcn_entry) | |
6c12686b PT |
681 | { |
682 | /* Present if entry is declared to be a module procedure. */ | |
683 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); | |
aa84a9a5 | 684 | |
6c12686b PT |
685 | if (*result == NULL) |
686 | rc = gfc_get_symbol (name, NULL, result); | |
aa84a9a5 PT |
687 | else if (gfc_get_symbol (name, NULL, &sym) == 0 |
688 | && sym | |
689 | && sym->ts.type != BT_UNKNOWN | |
690 | && (*result)->ts.type == BT_UNKNOWN | |
691 | && sym->attr.flavor == FL_UNKNOWN) | |
692 | /* Pick up the typespec for the entry, if declared in the function | |
693 | body. Note that this symbol is FL_UNKNOWN because it will | |
694 | only have appeared in a type declaration. The local symtree | |
695 | is set to point to the module symbol and a unique symtree | |
696 | to the local version. This latter ensures a correct clearing | |
697 | of the symbols. */ | |
698 | { | |
699 | (*result)->ts = sym->ts; | |
700 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); | |
701 | st->n.sym = *result; | |
702 | st = gfc_get_unique_symtree (gfc_current_ns); | |
703 | st->n.sym = sym; | |
704 | } | |
6c12686b | 705 | } |
68ea355b PT |
706 | else |
707 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
6de9cd9a | 708 | |
68ea355b | 709 | sym = *result; |
2c693a24 | 710 | gfc_current_ns->refs++; |
6de9cd9a | 711 | |
68ea355b PT |
712 | if (sym && !sym->new && gfc_current_state () != COMP_INTERFACE) |
713 | { | |
cda7004b PT |
714 | /* Trap another encompassed procedure with the same name. All |
715 | these conditions are necessary to avoid picking up an entry | |
716 | whose name clashes with that of the encompassing procedure; | |
717 | this is handled using gsymbols to register unique,globally | |
718 | accessible names. */ | |
68ea355b | 719 | if (sym->attr.flavor != 0 |
636dff67 SK |
720 | && sym->attr.proc != 0 |
721 | && (sym->attr.subroutine || sym->attr.function) | |
722 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
68ea355b PT |
723 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
724 | name, &sym->declared_at); | |
725 | ||
fd3e70af JD |
726 | /* Trap a procedure with a name the same as interface in the |
727 | encompassing scope. */ | |
728 | if (sym->attr.generic != 0 | |
2305fa31 JD |
729 | && (sym->attr.subroutine || sym->attr.function) |
730 | && !sym->attr.mod_proc) | |
fd3e70af JD |
731 | gfc_error_now ("Name '%s' at %C is already defined" |
732 | " as a generic interface at %L", | |
733 | name, &sym->declared_at); | |
734 | ||
68ea355b PT |
735 | /* Trap declarations of attributes in encompassing scope. The |
736 | signature for this is that ts.kind is set. Legitimate | |
737 | references only set ts.type. */ | |
738 | if (sym->ts.kind != 0 | |
636dff67 SK |
739 | && !sym->attr.implicit_type |
740 | && sym->attr.proc == 0 | |
741 | && gfc_current_ns->parent != NULL | |
742 | && sym->attr.access == 0 | |
743 | && !module_fcn_entry) | |
744 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
745 | "and must not have attributes declared at %L", | |
68ea355b PT |
746 | name, &sym->declared_at); |
747 | } | |
748 | ||
749 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
750 | return rc; | |
6de9cd9a | 751 | |
1a492601 PT |
752 | /* Module function entries will already have a symtree in |
753 | the current namespace but will need one at module level. */ | |
754 | if (module_fcn_entry) | |
6c12686b PT |
755 | { |
756 | /* Present if entry is declared to be a module procedure. */ | |
757 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); | |
758 | if (st == NULL) | |
759 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
760 | } | |
1a492601 PT |
761 | else |
762 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
6de9cd9a | 763 | |
6de9cd9a DN |
764 | st->n.sym = sym; |
765 | sym->refs++; | |
766 | ||
66e4ab31 | 767 | /* See if the procedure should be a module procedure. */ |
6de9cd9a | 768 | |
1a492601 | 769 | if (((sym->ns->proc_name != NULL |
6c12686b PT |
770 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
771 | && sym->attr.proc != PROC_MODULE) | |
772 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) | |
773 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
774 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
775 | rc = 2; |
776 | ||
777 | return rc; | |
778 | } | |
779 | ||
780 | ||
a8b3b0b6 CR |
781 | /* Verify that the given symbol representing a parameter is C |
782 | interoperable, by checking to see if it was marked as such after | |
783 | its declaration. If the given symbol is not interoperable, a | |
784 | warning is reported, thus removing the need to return the status to | |
785 | the calling function. The standard does not require the user use | |
786 | one of the iso_c_binding named constants to declare an | |
787 | interoperable parameter, but we can't be sure if the param is C | |
788 | interop or not if the user doesn't. For example, integer(4) may be | |
789 | legal Fortran, but doesn't have meaning in C. It may interop with | |
790 | a number of the C types, which causes a problem because the | |
791 | compiler can't know which one. This code is almost certainly not | |
792 | portable, and the user will get what they deserve if the C type | |
793 | across platforms isn't always interoperable with integer(4). If | |
794 | the user had used something like integer(c_int) or integer(c_long), | |
795 | the compiler could have automatically handled the varying sizes | |
796 | across platforms. */ | |
797 | ||
798 | try | |
799 | verify_c_interop_param (gfc_symbol *sym) | |
800 | { | |
801 | int is_c_interop = 0; | |
802 | try retval = SUCCESS; | |
803 | ||
804 | /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). | |
805 | Don't repeat the checks here. */ | |
806 | if (sym->attr.implicit_type) | |
807 | return SUCCESS; | |
808 | ||
809 | /* For subroutines or functions that are passed to a BIND(C) procedure, | |
810 | they're interoperable if they're BIND(C) and their params are all | |
811 | interoperable. */ | |
812 | if (sym->attr.flavor == FL_PROCEDURE) | |
813 | { | |
814 | if (sym->attr.is_bind_c == 0) | |
815 | { | |
816 | gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " | |
817 | "attribute to be C interoperable", sym->name, | |
818 | &(sym->declared_at)); | |
819 | ||
820 | return FAILURE; | |
821 | } | |
822 | else | |
823 | { | |
824 | if (sym->attr.is_c_interop == 1) | |
825 | /* We've already checked this procedure; don't check it again. */ | |
826 | return SUCCESS; | |
827 | else | |
828 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, | |
829 | sym->common_block); | |
830 | } | |
831 | } | |
832 | ||
833 | /* See if we've stored a reference to a procedure that owns sym. */ | |
834 | if (sym->ns != NULL && sym->ns->proc_name != NULL) | |
835 | { | |
836 | if (sym->ns->proc_name->attr.is_bind_c == 1) | |
837 | { | |
838 | is_c_interop = | |
839 | (verify_c_interop (&(sym->ts), sym->name, &(sym->declared_at)) | |
840 | == SUCCESS ? 1 : 0); | |
841 | ||
842 | if (is_c_interop != 1) | |
843 | { | |
844 | /* Make personalized messages to give better feedback. */ | |
845 | if (sym->ts.type == BT_DERIVED) | |
846 | gfc_error ("Type '%s' at %L is a parameter to the BIND(C) " | |
847 | " procedure '%s' but is not C interoperable " | |
848 | "because derived type '%s' is not C interoperable", | |
849 | sym->name, &(sym->declared_at), | |
850 | sym->ns->proc_name->name, | |
851 | sym->ts.derived->name); | |
852 | else | |
853 | gfc_warning ("Variable '%s' at %L is a parameter to the " | |
854 | "BIND(C) procedure '%s' but may not be C " | |
855 | "interoperable", | |
856 | sym->name, &(sym->declared_at), | |
857 | sym->ns->proc_name->name); | |
858 | } | |
aa5e22f0 CR |
859 | |
860 | /* Character strings are only C interoperable if they have a | |
861 | length of 1. */ | |
862 | if (sym->ts.type == BT_CHARACTER) | |
863 | { | |
864 | gfc_charlen *cl = sym->ts.cl; | |
865 | if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT | |
866 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) | |
867 | { | |
868 | gfc_error ("Character argument '%s' at %L " | |
869 | "must be length 1 because " | |
870 | "procedure '%s' is BIND(C)", | |
871 | sym->name, &sym->declared_at, | |
872 | sym->ns->proc_name->name); | |
873 | retval = FAILURE; | |
874 | } | |
875 | } | |
876 | ||
a8b3b0b6 CR |
877 | /* We have to make sure that any param to a bind(c) routine does |
878 | not have the allocatable, pointer, or optional attributes, | |
879 | according to J3/04-007, section 5.1. */ | |
880 | if (sym->attr.allocatable == 1) | |
881 | { | |
882 | gfc_error ("Variable '%s' at %L cannot have the " | |
883 | "ALLOCATABLE attribute because procedure '%s'" | |
884 | " is BIND(C)", sym->name, &(sym->declared_at), | |
885 | sym->ns->proc_name->name); | |
886 | retval = FAILURE; | |
887 | } | |
888 | ||
889 | if (sym->attr.pointer == 1) | |
890 | { | |
891 | gfc_error ("Variable '%s' at %L cannot have the " | |
892 | "POINTER attribute because procedure '%s'" | |
893 | " is BIND(C)", sym->name, &(sym->declared_at), | |
894 | sym->ns->proc_name->name); | |
895 | retval = FAILURE; | |
896 | } | |
897 | ||
898 | if (sym->attr.optional == 1) | |
899 | { | |
900 | gfc_error ("Variable '%s' at %L cannot have the " | |
901 | "OPTIONAL attribute because procedure '%s'" | |
902 | " is BIND(C)", sym->name, &(sym->declared_at), | |
903 | sym->ns->proc_name->name); | |
904 | retval = FAILURE; | |
905 | } | |
906 | ||
907 | /* Make sure that if it has the dimension attribute, that it is | |
908 | either assumed size or explicit shape. */ | |
909 | if (sym->as != NULL) | |
910 | { | |
911 | if (sym->as->type == AS_ASSUMED_SHAPE) | |
912 | { | |
913 | gfc_error ("Assumed-shape array '%s' at %L cannot be an " | |
914 | "argument to the procedure '%s' at %L because " | |
915 | "the procedure is BIND(C)", sym->name, | |
916 | &(sym->declared_at), sym->ns->proc_name->name, | |
917 | &(sym->ns->proc_name->declared_at)); | |
918 | retval = FAILURE; | |
919 | } | |
920 | ||
921 | if (sym->as->type == AS_DEFERRED) | |
922 | { | |
923 | gfc_error ("Deferred-shape array '%s' at %L cannot be an " | |
924 | "argument to the procedure '%s' at %L because " | |
925 | "the procedure is BIND(C)", sym->name, | |
926 | &(sym->declared_at), sym->ns->proc_name->name, | |
927 | &(sym->ns->proc_name->declared_at)); | |
928 | retval = FAILURE; | |
929 | } | |
930 | } | |
931 | } | |
932 | } | |
933 | ||
934 | return retval; | |
935 | } | |
936 | ||
937 | ||
938 | /* Function called by variable_decl() that adds a name to the symbol table. */ | |
6de9cd9a DN |
939 | |
940 | static try | |
636dff67 SK |
941 | build_sym (const char *name, gfc_charlen *cl, |
942 | gfc_array_spec **as, locus *var_locus) | |
6de9cd9a DN |
943 | { |
944 | symbol_attribute attr; | |
945 | gfc_symbol *sym; | |
946 | ||
9e35b386 | 947 | if (gfc_get_symbol (name, NULL, &sym)) |
6de9cd9a DN |
948 | return FAILURE; |
949 | ||
66e4ab31 | 950 | /* Start updating the symbol table. Add basic type attribute if present. */ |
6de9cd9a | 951 | if (current_ts.type != BT_UNKNOWN |
636dff67 SK |
952 | && (sym->attr.implicit_type == 0 |
953 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
6de9cd9a DN |
954 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
955 | return FAILURE; | |
956 | ||
957 | if (sym->ts.type == BT_CHARACTER) | |
958 | sym->ts.cl = cl; | |
959 | ||
960 | /* Add dimension attribute if present. */ | |
961 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
962 | return FAILURE; | |
963 | *as = NULL; | |
964 | ||
965 | /* Add attribute to symbol. The copy is so that we can reset the | |
966 | dimension attribute. */ | |
967 | attr = current_attr; | |
968 | attr.dimension = 0; | |
969 | ||
970 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
971 | return FAILURE; | |
972 | ||
a8b3b0b6 CR |
973 | /* Finish any work that may need to be done for the binding label, |
974 | if it's a bind(c). The bind(c) attr is found before the symbol | |
975 | is made, and before the symbol name (for data decls), so the | |
976 | current_ts is holding the binding label, or nothing if the | |
977 | name= attr wasn't given. Therefore, test here if we're dealing | |
978 | with a bind(c) and make sure the binding label is set correctly. */ | |
979 | if (sym->attr.is_bind_c == 1) | |
980 | { | |
981 | if (sym->binding_label[0] == '\0') | |
982 | { | |
983 | /* Here, we're not checking the numIdents (the last param). | |
984 | This could be an error we're letting slip through! */ | |
985 | if (set_binding_label (sym->binding_label, sym->name, 1) == FAILURE) | |
986 | return FAILURE; | |
987 | } | |
988 | } | |
989 | ||
990 | /* See if we know we're in a common block, and if it's a bind(c) | |
991 | common then we need to make sure we're an interoperable type. */ | |
992 | if (sym->attr.in_common == 1) | |
993 | { | |
994 | /* Test the common block object. */ | |
995 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 | |
996 | && sym->ts.is_c_interop != 1) | |
997 | { | |
998 | gfc_error_now ("Variable '%s' in common block '%s' at %C " | |
999 | "must be declared with a C interoperable " | |
1000 | "kind since common block '%s' is BIND(C)", | |
1001 | sym->name, sym->common_block->name, | |
1002 | sym->common_block->name); | |
1003 | gfc_clear_error (); | |
1004 | } | |
1005 | } | |
1006 | ||
9a3db5a3 PT |
1007 | sym->attr.implied_index = 0; |
1008 | ||
6de9cd9a DN |
1009 | return SUCCESS; |
1010 | } | |
1011 | ||
636dff67 | 1012 | |
df7cc9b5 FW |
1013 | /* Set character constant to the given length. The constant will be padded or |
1014 | truncated. */ | |
1015 | ||
1016 | void | |
636dff67 | 1017 | gfc_set_constant_character_len (int len, gfc_expr *expr, bool array) |
df7cc9b5 | 1018 | { |
636dff67 | 1019 | char *s; |
df7cc9b5 FW |
1020 | int slen; |
1021 | ||
1022 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
1023 | gcc_assert (expr->ts.type == BT_CHARACTER && expr->ts.kind == 1); | |
1024 | ||
1025 | slen = expr->value.character.length; | |
1026 | if (len != slen) | |
1027 | { | |
150675a8 | 1028 | s = gfc_getmem (len + 1); |
df7cc9b5 FW |
1029 | memcpy (s, expr->value.character.string, MIN (len, slen)); |
1030 | if (len > slen) | |
1031 | memset (&s[slen], ' ', len - slen); | |
2220652d PT |
1032 | |
1033 | if (gfc_option.warn_character_truncation && slen > len) | |
1034 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
1035 | "(%d/%d)", &expr->where, slen, len); | |
1036 | ||
1037 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
1038 | initializers. */ | |
1039 | if (array && slen < len && !(gfc_option.allow_std & GFC_STD_GNU)) | |
1040 | gfc_error_now ("The CHARACTER elements of the array constructor " | |
1041 | "at %L must have the same length (%d/%d)", | |
636dff67 | 1042 | &expr->where, slen, len); |
2220652d | 1043 | |
150675a8 | 1044 | s[len] = '\0'; |
df7cc9b5 FW |
1045 | gfc_free (expr->value.character.string); |
1046 | expr->value.character.string = s; | |
1047 | expr->value.character.length = len; | |
1048 | } | |
1049 | } | |
6de9cd9a | 1050 | |
25d8f0a2 | 1051 | |
d51347f9 | 1052 | /* Function to create and update the enumerator history |
25d8f0a2 | 1053 | using the information passed as arguments. |
d51347f9 TB |
1054 | Pointer "max_enum" is also updated, to point to |
1055 | enum history node containing largest initializer. | |
25d8f0a2 TS |
1056 | |
1057 | SYM points to the symbol node of enumerator. | |
66e4ab31 | 1058 | INIT points to its enumerator value. */ |
25d8f0a2 | 1059 | |
d51347f9 | 1060 | static void |
636dff67 | 1061 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
25d8f0a2 TS |
1062 | { |
1063 | enumerator_history *new_enum_history; | |
1064 | gcc_assert (sym != NULL && init != NULL); | |
1065 | ||
1066 | new_enum_history = gfc_getmem (sizeof (enumerator_history)); | |
1067 | ||
1068 | new_enum_history->sym = sym; | |
1069 | new_enum_history->initializer = init; | |
1070 | new_enum_history->next = NULL; | |
1071 | ||
1072 | if (enum_history == NULL) | |
1073 | { | |
1074 | enum_history = new_enum_history; | |
1075 | max_enum = enum_history; | |
1076 | } | |
1077 | else | |
1078 | { | |
1079 | new_enum_history->next = enum_history; | |
1080 | enum_history = new_enum_history; | |
1081 | ||
d51347f9 | 1082 | if (mpz_cmp (max_enum->initializer->value.integer, |
25d8f0a2 | 1083 | new_enum_history->initializer->value.integer) < 0) |
636dff67 | 1084 | max_enum = new_enum_history; |
25d8f0a2 TS |
1085 | } |
1086 | } | |
1087 | ||
1088 | ||
d51347f9 | 1089 | /* Function to free enum kind history. */ |
25d8f0a2 | 1090 | |
d51347f9 | 1091 | void |
636dff67 | 1092 | gfc_free_enum_history (void) |
25d8f0a2 | 1093 | { |
d51347f9 TB |
1094 | enumerator_history *current = enum_history; |
1095 | enumerator_history *next; | |
25d8f0a2 TS |
1096 | |
1097 | while (current != NULL) | |
1098 | { | |
1099 | next = current->next; | |
1100 | gfc_free (current); | |
1101 | current = next; | |
1102 | } | |
1103 | max_enum = NULL; | |
1104 | enum_history = NULL; | |
1105 | } | |
1106 | ||
1107 | ||
6de9cd9a DN |
1108 | /* Function called by variable_decl() that adds an initialization |
1109 | expression to a symbol. */ | |
1110 | ||
1111 | static try | |
66e4ab31 | 1112 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) |
6de9cd9a DN |
1113 | { |
1114 | symbol_attribute attr; | |
1115 | gfc_symbol *sym; | |
1116 | gfc_expr *init; | |
1117 | ||
1118 | init = *initp; | |
1119 | if (find_special (name, &sym)) | |
1120 | return FAILURE; | |
1121 | ||
1122 | attr = sym->attr; | |
1123 | ||
1124 | /* If this symbol is confirming an implicit parameter type, | |
1125 | then an initialization expression is not allowed. */ | |
1126 | if (attr.flavor == FL_PARAMETER | |
1127 | && sym->value != NULL | |
1128 | && *initp != NULL) | |
1129 | { | |
1130 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
1131 | sym->name); | |
1132 | return FAILURE; | |
1133 | } | |
1134 | ||
c8e20bd0 TS |
1135 | if (attr.in_common |
1136 | && !attr.data | |
1137 | && *initp != NULL) | |
1138 | { | |
1139 | gfc_error ("Initializer not allowed for COMMON variable '%s' at %C", | |
1140 | sym->name); | |
1141 | return FAILURE; | |
1142 | } | |
1143 | ||
6de9cd9a DN |
1144 | if (init == NULL) |
1145 | { | |
1146 | /* An initializer is required for PARAMETER declarations. */ | |
1147 | if (attr.flavor == FL_PARAMETER) | |
1148 | { | |
1149 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
1150 | return FAILURE; | |
1151 | } | |
1152 | } | |
1153 | else | |
1154 | { | |
1155 | /* If a variable appears in a DATA block, it cannot have an | |
1de8a836 | 1156 | initializer. */ |
6de9cd9a DN |
1157 | if (sym->attr.data) |
1158 | { | |
636dff67 SK |
1159 | gfc_error ("Variable '%s' at %C with an initializer already " |
1160 | "appears in a DATA statement", sym->name); | |
6de9cd9a DN |
1161 | return FAILURE; |
1162 | } | |
1163 | ||
75d17889 TS |
1164 | /* Check if the assignment can happen. This has to be put off |
1165 | until later for a derived type variable. */ | |
6de9cd9a DN |
1166 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
1167 | && gfc_check_assign_symbol (sym, init) == FAILURE) | |
1168 | return FAILURE; | |
1169 | ||
df7cc9b5 FW |
1170 | if (sym->ts.type == BT_CHARACTER && sym->ts.cl) |
1171 | { | |
1172 | /* Update symbol character length according initializer. */ | |
1173 | if (sym->ts.cl->length == NULL) | |
1174 | { | |
66e4ab31 SK |
1175 | /* If there are multiple CHARACTER variables declared on the |
1176 | same line, we don't want them to share the same length. */ | |
4213f93b PT |
1177 | sym->ts.cl = gfc_get_charlen (); |
1178 | sym->ts.cl->next = gfc_current_ns->cl_list; | |
1179 | gfc_current_ns->cl_list = sym->ts.cl; | |
96f4873b PT |
1180 | |
1181 | if (sym->attr.flavor == FL_PARAMETER | |
636dff67 | 1182 | && init->expr_type == EXPR_ARRAY) |
96f4873b | 1183 | sym->ts.cl->length = gfc_copy_expr (init->ts.cl->length); |
df7cc9b5 FW |
1184 | } |
1185 | /* Update initializer character length according symbol. */ | |
1186 | else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT) | |
1187 | { | |
1188 | int len = mpz_get_si (sym->ts.cl->length->value.integer); | |
1189 | gfc_constructor * p; | |
1190 | ||
1191 | if (init->expr_type == EXPR_CONSTANT) | |
2220652d | 1192 | gfc_set_constant_character_len (len, init, false); |
df7cc9b5 FW |
1193 | else if (init->expr_type == EXPR_ARRAY) |
1194 | { | |
dcdc7b6c PT |
1195 | /* Build a new charlen to prevent simplification from |
1196 | deleting the length before it is resolved. */ | |
1197 | init->ts.cl = gfc_get_charlen (); | |
1198 | init->ts.cl->next = gfc_current_ns->cl_list; | |
1199 | gfc_current_ns->cl_list = sym->ts.cl; | |
df7cc9b5 | 1200 | init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length); |
dcdc7b6c | 1201 | |
df7cc9b5 | 1202 | for (p = init->value.constructor; p; p = p->next) |
2220652d | 1203 | gfc_set_constant_character_len (len, p->expr, false); |
df7cc9b5 FW |
1204 | } |
1205 | } | |
1206 | } | |
1207 | ||
a8b3b0b6 CR |
1208 | /* Need to check if the expression we initialized this |
1209 | to was one of the iso_c_binding named constants. If so, | |
1210 | and we're a parameter (constant), let it be iso_c. | |
1211 | For example: | |
1212 | integer(c_int), parameter :: my_int = c_int | |
1213 | integer(my_int) :: my_int_2 | |
1214 | If we mark my_int as iso_c (since we can see it's value | |
1215 | is equal to one of the named constants), then my_int_2 | |
1216 | will be considered C interoperable. */ | |
1217 | if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) | |
1218 | { | |
1219 | sym->ts.is_iso_c |= init->ts.is_iso_c; | |
1220 | sym->ts.is_c_interop |= init->ts.is_c_interop; | |
1221 | /* attr bits needed for module files. */ | |
1222 | sym->attr.is_iso_c |= init->ts.is_iso_c; | |
1223 | sym->attr.is_c_interop |= init->ts.is_c_interop; | |
1224 | if (init->ts.is_iso_c) | |
1225 | sym->ts.f90_type = init->ts.f90_type; | |
1226 | } | |
1227 | ||
6de9cd9a DN |
1228 | /* Add initializer. Make sure we keep the ranks sane. */ |
1229 | if (sym->attr.dimension && init->rank == 0) | |
a9b43781 PT |
1230 | { |
1231 | mpz_t size; | |
1232 | gfc_expr *array; | |
1233 | gfc_constructor *c; | |
1234 | int n; | |
1235 | if (sym->attr.flavor == FL_PARAMETER | |
1236 | && init->expr_type == EXPR_CONSTANT | |
1237 | && spec_size (sym->as, &size) == SUCCESS | |
1238 | && mpz_cmp_si (size, 0) > 0) | |
1239 | { | |
1240 | array = gfc_start_constructor (init->ts.type, init->ts.kind, | |
1241 | &init->where); | |
1242 | ||
1243 | array->value.constructor = c = NULL; | |
1244 | for (n = 0; n < (int)mpz_get_si (size); n++) | |
1245 | { | |
1246 | if (array->value.constructor == NULL) | |
1247 | { | |
1248 | array->value.constructor = c = gfc_get_constructor (); | |
1249 | c->expr = init; | |
1250 | } | |
1251 | else | |
1252 | { | |
1253 | c->next = gfc_get_constructor (); | |
1254 | c = c->next; | |
1255 | c->expr = gfc_copy_expr (init); | |
1256 | } | |
1257 | } | |
1258 | ||
1259 | array->shape = gfc_get_shape (sym->as->rank); | |
1260 | for (n = 0; n < sym->as->rank; n++) | |
1261 | spec_dimen_size (sym->as, n, &array->shape[n]); | |
1262 | ||
1263 | init = array; | |
1264 | mpz_clear (size); | |
1265 | } | |
1266 | init->rank = sym->as->rank; | |
1267 | } | |
6de9cd9a DN |
1268 | |
1269 | sym->value = init; | |
ef7236d2 DF |
1270 | if (sym->attr.save == SAVE_NONE) |
1271 | sym->attr.save = SAVE_IMPLICIT; | |
6de9cd9a DN |
1272 | *initp = NULL; |
1273 | } | |
1274 | ||
1275 | return SUCCESS; | |
1276 | } | |
1277 | ||
1278 | ||
1279 | /* Function called by variable_decl() that adds a name to a structure | |
1280 | being built. */ | |
1281 | ||
1282 | static try | |
636dff67 SK |
1283 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
1284 | gfc_array_spec **as) | |
6de9cd9a DN |
1285 | { |
1286 | gfc_component *c; | |
1287 | ||
1288 | /* If the current symbol is of the same derived type that we're | |
1289 | constructing, it must have the pointer attribute. */ | |
1290 | if (current_ts.type == BT_DERIVED | |
1291 | && current_ts.derived == gfc_current_block () | |
1292 | && current_attr.pointer == 0) | |
1293 | { | |
1294 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1295 | return FAILURE; | |
1296 | } | |
1297 | ||
636dff67 | 1298 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
6de9cd9a DN |
1299 | { |
1300 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1301 | { | |
1302 | gfc_error ("Array component of structure at %C must have explicit " | |
1303 | "or deferred shape"); | |
1304 | return FAILURE; | |
1305 | } | |
1306 | } | |
1307 | ||
1308 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1309 | return FAILURE; | |
1310 | ||
1311 | c->ts = current_ts; | |
1312 | c->ts.cl = cl; | |
1313 | gfc_set_component_attr (c, ¤t_attr); | |
1314 | ||
1315 | c->initializer = *init; | |
1316 | *init = NULL; | |
1317 | ||
1318 | c->as = *as; | |
1319 | if (c->as != NULL) | |
1320 | c->dimension = 1; | |
1321 | *as = NULL; | |
1322 | ||
1323 | /* Check array components. */ | |
1324 | if (!c->dimension) | |
5046aff5 PT |
1325 | { |
1326 | if (c->allocatable) | |
1327 | { | |
1328 | gfc_error ("Allocatable component at %C must be an array"); | |
1329 | return FAILURE; | |
1330 | } | |
1331 | else | |
1332 | return SUCCESS; | |
1333 | } | |
6de9cd9a DN |
1334 | |
1335 | if (c->pointer) | |
1336 | { | |
1337 | if (c->as->type != AS_DEFERRED) | |
1338 | { | |
5046aff5 PT |
1339 | gfc_error ("Pointer array component of structure at %C must have a " |
1340 | "deferred shape"); | |
1341 | return FAILURE; | |
1342 | } | |
1343 | } | |
1344 | else if (c->allocatable) | |
1345 | { | |
1346 | if (c->as->type != AS_DEFERRED) | |
1347 | { | |
1348 | gfc_error ("Allocatable component of structure at %C must have a " | |
1349 | "deferred shape"); | |
6de9cd9a DN |
1350 | return FAILURE; |
1351 | } | |
1352 | } | |
1353 | else | |
1354 | { | |
1355 | if (c->as->type != AS_EXPLICIT) | |
1356 | { | |
636dff67 SK |
1357 | gfc_error ("Array component of structure at %C must have an " |
1358 | "explicit shape"); | |
6de9cd9a DN |
1359 | return FAILURE; |
1360 | } | |
1361 | } | |
1362 | ||
1363 | return SUCCESS; | |
1364 | } | |
1365 | ||
1366 | ||
1367 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1368 | ||
1369 | match | |
636dff67 | 1370 | gfc_match_null (gfc_expr **result) |
6de9cd9a DN |
1371 | { |
1372 | gfc_symbol *sym; | |
1373 | gfc_expr *e; | |
1374 | match m; | |
1375 | ||
1376 | m = gfc_match (" null ( )"); | |
1377 | if (m != MATCH_YES) | |
1378 | return m; | |
1379 | ||
1380 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1381 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1382 | { | |
1383 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1384 | return MATCH_ERROR; | |
1385 | } | |
1386 | ||
1387 | gfc_intrinsic_symbol (sym); | |
1388 | ||
1389 | if (sym->attr.proc != PROC_INTRINSIC | |
231b2fcc TS |
1390 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1391 | sym->name, NULL) == FAILURE | |
1392 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
6de9cd9a DN |
1393 | return MATCH_ERROR; |
1394 | ||
1395 | e = gfc_get_expr (); | |
63645982 | 1396 | e->where = gfc_current_locus; |
6de9cd9a DN |
1397 | e->expr_type = EXPR_NULL; |
1398 | e->ts.type = BT_UNKNOWN; | |
1399 | ||
1400 | *result = e; | |
1401 | ||
1402 | return MATCH_YES; | |
1403 | } | |
1404 | ||
1405 | ||
6de9cd9a DN |
1406 | /* Match a variable name with an optional initializer. When this |
1407 | subroutine is called, a variable is expected to be parsed next. | |
1408 | Depending on what is happening at the moment, updates either the | |
1409 | symbol table or the current interface. */ | |
1410 | ||
1411 | static match | |
949d5b72 | 1412 | variable_decl (int elem) |
6de9cd9a DN |
1413 | { |
1414 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1415 | gfc_expr *initializer, *char_len; | |
1416 | gfc_array_spec *as; | |
83d890b9 | 1417 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
6de9cd9a DN |
1418 | gfc_charlen *cl; |
1419 | locus var_locus; | |
1420 | match m; | |
1421 | try t; | |
83d890b9 | 1422 | gfc_symbol *sym; |
25d8f0a2 | 1423 | locus old_locus; |
6de9cd9a DN |
1424 | |
1425 | initializer = NULL; | |
1426 | as = NULL; | |
83d890b9 | 1427 | cp_as = NULL; |
25d8f0a2 | 1428 | old_locus = gfc_current_locus; |
6de9cd9a DN |
1429 | |
1430 | /* When we get here, we've just matched a list of attributes and | |
1431 | maybe a type and a double colon. The next thing we expect to see | |
1432 | is the name of the symbol. */ | |
1433 | m = gfc_match_name (name); | |
1434 | if (m != MATCH_YES) | |
1435 | goto cleanup; | |
1436 | ||
63645982 | 1437 | var_locus = gfc_current_locus; |
6de9cd9a DN |
1438 | |
1439 | /* Now we could see the optional array spec. or character length. */ | |
1440 | m = gfc_match_array_spec (&as); | |
83d890b9 AL |
1441 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1442 | cp_as = gfc_copy_array_spec (as); | |
1443 | else if (m == MATCH_ERROR) | |
6de9cd9a | 1444 | goto cleanup; |
25d8f0a2 | 1445 | |
6de9cd9a DN |
1446 | if (m == MATCH_NO) |
1447 | as = gfc_copy_array_spec (current_as); | |
1448 | ||
1449 | char_len = NULL; | |
1450 | cl = NULL; | |
1451 | ||
1452 | if (current_ts.type == BT_CHARACTER) | |
1453 | { | |
1454 | switch (match_char_length (&char_len)) | |
1455 | { | |
1456 | case MATCH_YES: | |
1457 | cl = gfc_get_charlen (); | |
1458 | cl->next = gfc_current_ns->cl_list; | |
1459 | gfc_current_ns->cl_list = cl; | |
1460 | ||
1461 | cl->length = char_len; | |
1462 | break; | |
1463 | ||
949d5b72 PT |
1464 | /* Non-constant lengths need to be copied after the first |
1465 | element. */ | |
6de9cd9a | 1466 | case MATCH_NO: |
949d5b72 | 1467 | if (elem > 1 && current_ts.cl->length |
636dff67 | 1468 | && current_ts.cl->length->expr_type != EXPR_CONSTANT) |
949d5b72 PT |
1469 | { |
1470 | cl = gfc_get_charlen (); | |
1471 | cl->next = gfc_current_ns->cl_list; | |
1472 | gfc_current_ns->cl_list = cl; | |
1473 | cl->length = gfc_copy_expr (current_ts.cl->length); | |
1474 | } | |
1475 | else | |
1476 | cl = current_ts.cl; | |
1477 | ||
6de9cd9a DN |
1478 | break; |
1479 | ||
1480 | case MATCH_ERROR: | |
1481 | goto cleanup; | |
1482 | } | |
1483 | } | |
1484 | ||
83d890b9 | 1485 | /* If this symbol has already shown up in a Cray Pointer declaration, |
66e4ab31 | 1486 | then we want to set the type & bail out. */ |
83d890b9 AL |
1487 | if (gfc_option.flag_cray_pointer) |
1488 | { | |
1489 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1490 | if (sym != NULL && sym->attr.cray_pointee) | |
1491 | { | |
1492 | sym->ts.type = current_ts.type; | |
1493 | sym->ts.kind = current_ts.kind; | |
1494 | sym->ts.cl = cl; | |
1495 | sym->ts.derived = current_ts.derived; | |
a8b3b0b6 CR |
1496 | sym->ts.is_c_interop = current_ts.is_c_interop; |
1497 | sym->ts.is_iso_c = current_ts.is_iso_c; | |
83d890b9 AL |
1498 | m = MATCH_YES; |
1499 | ||
1500 | /* Check to see if we have an array specification. */ | |
1501 | if (cp_as != NULL) | |
1502 | { | |
1503 | if (sym->as != NULL) | |
1504 | { | |
e25a0da3 | 1505 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
83d890b9 AL |
1506 | gfc_free_array_spec (cp_as); |
1507 | m = MATCH_ERROR; | |
1508 | goto cleanup; | |
1509 | } | |
1510 | else | |
1511 | { | |
1512 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1513 | gfc_internal_error ("Couldn't set pointee array spec."); | |
d51347f9 | 1514 | |
83d890b9 | 1515 | /* Fix the array spec. */ |
d51347f9 | 1516 | m = gfc_mod_pointee_as (sym->as); |
83d890b9 AL |
1517 | if (m == MATCH_ERROR) |
1518 | goto cleanup; | |
1519 | } | |
d51347f9 | 1520 | } |
83d890b9 AL |
1521 | goto cleanup; |
1522 | } | |
1523 | else | |
1524 | { | |
1525 | gfc_free_array_spec (cp_as); | |
1526 | } | |
1527 | } | |
d51347f9 TB |
1528 | |
1529 | ||
6de9cd9a DN |
1530 | /* OK, we've successfully matched the declaration. Now put the |
1531 | symbol in the current namespace, because it might be used in the | |
69de3b83 | 1532 | optional initialization expression for this symbol, e.g. this is |
6de9cd9a DN |
1533 | perfectly legal: |
1534 | ||
1535 | integer, parameter :: i = huge(i) | |
1536 | ||
1537 | This is only true for parameters or variables of a basic type. | |
1538 | For components of derived types, it is not true, so we don't | |
1539 | create a symbol for those yet. If we fail to create the symbol, | |
1540 | bail out. */ | |
1541 | if (gfc_current_state () != COMP_DERIVED | |
1542 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1543 | { | |
72af9f0b PT |
1544 | m = MATCH_ERROR; |
1545 | goto cleanup; | |
1546 | } | |
1547 | ||
6133c68a TS |
1548 | /* An interface body specifies all of the procedure's |
1549 | characteristics and these shall be consistent with those | |
1550 | specified in the procedure definition, except that the interface | |
1551 | may specify a procedure that is not pure if the procedure is | |
1552 | defined to be pure(12.3.2). */ | |
72af9f0b | 1553 | if (current_ts.type == BT_DERIVED |
636dff67 SK |
1554 | && gfc_current_ns->proc_name |
1555 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
5a8af0b4 PT |
1556 | && current_ts.derived->ns != gfc_current_ns) |
1557 | { | |
1558 | gfc_symtree *st; | |
1559 | st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.derived->name); | |
1560 | if (!(current_ts.derived->attr.imported | |
1561 | && st != NULL | |
1562 | && st->n.sym == current_ts.derived) | |
1563 | && !gfc_current_ns->has_import_set) | |
1564 | { | |
1565 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1566 | "interface", name); | |
1567 | m = MATCH_ERROR; | |
1568 | goto cleanup; | |
1569 | } | |
6de9cd9a DN |
1570 | } |
1571 | ||
1572 | /* In functions that have a RESULT variable defined, the function | |
1573 | name always refers to function calls. Therefore, the name is | |
1574 | not allowed to appear in specification statements. */ | |
1575 | if (gfc_current_state () == COMP_FUNCTION | |
1576 | && gfc_current_block () != NULL | |
1577 | && gfc_current_block ()->result != NULL | |
1578 | && gfc_current_block ()->result != gfc_current_block () | |
1579 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1580 | { | |
1581 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1582 | m = MATCH_ERROR; | |
1583 | goto cleanup; | |
1584 | } | |
1585 | ||
294fbfc8 TS |
1586 | /* We allow old-style initializations of the form |
1587 | integer i /2/, j(4) /3*3, 1/ | |
1588 | (if no colon has been seen). These are different from data | |
1589 | statements in that initializers are only allowed to apply to the | |
1590 | variable immediately preceding, i.e. | |
1591 | integer i, j /1, 2/ | |
1592 | is not allowed. Therefore we have to do some work manually, that | |
75d17889 | 1593 | could otherwise be left to the matchers for DATA statements. */ |
294fbfc8 TS |
1594 | |
1595 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1596 | { | |
1597 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1598 | "initialization at %C") == FAILURE) | |
1599 | return MATCH_ERROR; | |
d51347f9 | 1600 | |
294fbfc8 TS |
1601 | return match_old_style_init (name); |
1602 | } | |
1603 | ||
6de9cd9a DN |
1604 | /* The double colon must be present in order to have initializers. |
1605 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1606 | if (colon_seen) | |
1607 | { | |
1608 | if (gfc_match (" =>") == MATCH_YES) | |
1609 | { | |
6de9cd9a DN |
1610 | if (!current_attr.pointer) |
1611 | { | |
1612 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1613 | m = MATCH_ERROR; | |
1614 | goto cleanup; | |
1615 | } | |
1616 | ||
1617 | m = gfc_match_null (&initializer); | |
1618 | if (m == MATCH_NO) | |
1619 | { | |
def66134 | 1620 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
6de9cd9a DN |
1621 | m = MATCH_ERROR; |
1622 | } | |
1623 | ||
1624 | if (gfc_pure (NULL)) | |
1625 | { | |
636dff67 SK |
1626 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1627 | "a PURE procedure"); | |
6de9cd9a DN |
1628 | m = MATCH_ERROR; |
1629 | } | |
1630 | ||
1631 | if (m != MATCH_YES) | |
1632 | goto cleanup; | |
1633 | ||
6de9cd9a DN |
1634 | } |
1635 | else if (gfc_match_char ('=') == MATCH_YES) | |
1636 | { | |
1637 | if (current_attr.pointer) | |
1638 | { | |
636dff67 SK |
1639 | gfc_error ("Pointer initialization at %C requires '=>', " |
1640 | "not '='"); | |
6de9cd9a DN |
1641 | m = MATCH_ERROR; |
1642 | goto cleanup; | |
1643 | } | |
1644 | ||
1645 | m = gfc_match_init_expr (&initializer); | |
1646 | if (m == MATCH_NO) | |
1647 | { | |
1648 | gfc_error ("Expected an initialization expression at %C"); | |
1649 | m = MATCH_ERROR; | |
1650 | } | |
1651 | ||
1652 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1653 | { | |
636dff67 SK |
1654 | gfc_error ("Initialization of variable at %C is not allowed in " |
1655 | "a PURE procedure"); | |
6de9cd9a DN |
1656 | m = MATCH_ERROR; |
1657 | } | |
1658 | ||
1659 | if (m != MATCH_YES) | |
1660 | goto cleanup; | |
1661 | } | |
cb44ab82 VL |
1662 | } |
1663 | ||
5046aff5 PT |
1664 | if (initializer != NULL && current_attr.allocatable |
1665 | && gfc_current_state () == COMP_DERIVED) | |
1666 | { | |
636dff67 SK |
1667 | gfc_error ("Initialization of allocatable component at %C is not " |
1668 | "allowed"); | |
5046aff5 PT |
1669 | m = MATCH_ERROR; |
1670 | goto cleanup; | |
1671 | } | |
1672 | ||
54b4ba60 | 1673 | /* Add the initializer. Note that it is fine if initializer is |
6de9cd9a DN |
1674 | NULL here, because we sometimes also need to check if a |
1675 | declaration *must* have an initialization expression. */ | |
1676 | if (gfc_current_state () != COMP_DERIVED) | |
1677 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1678 | else | |
54b4ba60 | 1679 | { |
5046aff5 | 1680 | if (current_ts.type == BT_DERIVED |
636dff67 | 1681 | && !current_attr.pointer && !initializer) |
54b4ba60 PB |
1682 | initializer = gfc_default_initializer (¤t_ts); |
1683 | t = build_struct (name, cl, &initializer, &as); | |
1684 | } | |
6de9cd9a DN |
1685 | |
1686 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1687 | ||
1688 | cleanup: | |
1689 | /* Free stuff up and return. */ | |
1690 | gfc_free_expr (initializer); | |
1691 | gfc_free_array_spec (as); | |
1692 | ||
1693 | return m; | |
1694 | } | |
1695 | ||
1696 | ||
b2b81a3f BM |
1697 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
1698 | This assumes that the byte size is equal to the kind number for | |
1699 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
6de9cd9a DN |
1700 | |
1701 | match | |
636dff67 | 1702 | gfc_match_old_kind_spec (gfc_typespec *ts) |
6de9cd9a DN |
1703 | { |
1704 | match m; | |
5cf54585 | 1705 | int original_kind; |
6de9cd9a DN |
1706 | |
1707 | if (gfc_match_char ('*') != MATCH_YES) | |
1708 | return MATCH_NO; | |
1709 | ||
5cf54585 | 1710 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
6de9cd9a DN |
1711 | if (m != MATCH_YES) |
1712 | return MATCH_ERROR; | |
1713 | ||
e45b3c75 ES |
1714 | original_kind = ts->kind; |
1715 | ||
6de9cd9a | 1716 | /* Massage the kind numbers for complex types. */ |
e45b3c75 ES |
1717 | if (ts->type == BT_COMPLEX) |
1718 | { | |
1719 | if (ts->kind % 2) | |
636dff67 SK |
1720 | { |
1721 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1722 | gfc_basic_typename (ts->type), original_kind); | |
1723 | return MATCH_ERROR; | |
1724 | } | |
e45b3c75 ES |
1725 | ts->kind /= 2; |
1726 | } | |
6de9cd9a | 1727 | |
e7a2d5fb | 1728 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a | 1729 | { |
e45b3c75 | 1730 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
636dff67 | 1731 | gfc_basic_typename (ts->type), original_kind); |
6de9cd9a DN |
1732 | return MATCH_ERROR; |
1733 | } | |
1734 | ||
df8652dc SK |
1735 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
1736 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1737 | return MATCH_ERROR; | |
1738 | ||
6de9cd9a DN |
1739 | return MATCH_YES; |
1740 | } | |
1741 | ||
1742 | ||
1743 | /* Match a kind specification. Since kinds are generally optional, we | |
1744 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1745 | string is found, then we know we have an error. */ | |
1746 | ||
1747 | match | |
636dff67 | 1748 | gfc_match_kind_spec (gfc_typespec *ts) |
6de9cd9a DN |
1749 | { |
1750 | locus where; | |
1751 | gfc_expr *e; | |
1752 | match m, n; | |
1753 | const char *msg; | |
1754 | ||
1755 | m = MATCH_NO; | |
1756 | e = NULL; | |
1757 | ||
63645982 | 1758 | where = gfc_current_locus; |
6de9cd9a DN |
1759 | |
1760 | if (gfc_match_char ('(') == MATCH_NO) | |
1761 | return MATCH_NO; | |
1762 | ||
1763 | /* Also gobbles optional text. */ | |
1764 | if (gfc_match (" kind = ") == MATCH_YES) | |
1765 | m = MATCH_ERROR; | |
1766 | ||
1767 | n = gfc_match_init_expr (&e); | |
1768 | if (n == MATCH_NO) | |
1769 | gfc_error ("Expected initialization expression at %C"); | |
1770 | if (n != MATCH_YES) | |
1771 | return MATCH_ERROR; | |
1772 | ||
1773 | if (e->rank != 0) | |
1774 | { | |
1775 | gfc_error ("Expected scalar initialization expression at %C"); | |
1776 | m = MATCH_ERROR; | |
1777 | goto no_match; | |
1778 | } | |
1779 | ||
1780 | msg = gfc_extract_int (e, &ts->kind); | |
1781 | if (msg != NULL) | |
1782 | { | |
1783 | gfc_error (msg); | |
1784 | m = MATCH_ERROR; | |
1785 | goto no_match; | |
1786 | } | |
1787 | ||
a8b3b0b6 CR |
1788 | /* Before throwing away the expression, let's see if we had a |
1789 | C interoperable kind (and store the fact). */ | |
1790 | if (e->ts.is_c_interop == 1) | |
1791 | { | |
1792 | /* Mark this as c interoperable if being declared with one | |
1793 | of the named constants from iso_c_binding. */ | |
1794 | ts->is_c_interop = e->ts.is_iso_c; | |
1795 | ts->f90_type = e->ts.f90_type; | |
1796 | } | |
1797 | ||
6de9cd9a DN |
1798 | gfc_free_expr (e); |
1799 | e = NULL; | |
1800 | ||
a8b3b0b6 CR |
1801 | /* Ignore errors to this point, if we've gotten here. This means |
1802 | we ignore the m=MATCH_ERROR from above. */ | |
e7a2d5fb | 1803 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a DN |
1804 | { |
1805 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
1806 | gfc_basic_typename (ts->type)); | |
6de9cd9a | 1807 | m = MATCH_ERROR; |
6de9cd9a | 1808 | } |
a8b3b0b6 | 1809 | else if (gfc_match_char (')') != MATCH_YES) |
6de9cd9a | 1810 | { |
8998be20 | 1811 | gfc_error ("Missing right parenthesis at %C"); |
a8b3b0b6 | 1812 | m = MATCH_ERROR; |
6de9cd9a | 1813 | } |
a8b3b0b6 CR |
1814 | else |
1815 | /* All tests passed. */ | |
1816 | m = MATCH_YES; | |
6de9cd9a | 1817 | |
a8b3b0b6 CR |
1818 | if(m == MATCH_ERROR) |
1819 | gfc_current_locus = where; | |
1820 | ||
1821 | /* Return what we know from the test(s). */ | |
1822 | return m; | |
6de9cd9a DN |
1823 | |
1824 | no_match: | |
1825 | gfc_free_expr (e); | |
63645982 | 1826 | gfc_current_locus = where; |
6de9cd9a DN |
1827 | return m; |
1828 | } | |
1829 | ||
1830 | ||
1831 | /* Match the various kind/length specifications in a CHARACTER | |
1832 | declaration. We don't return MATCH_NO. */ | |
1833 | ||
1834 | static match | |
636dff67 | 1835 | match_char_spec (gfc_typespec *ts) |
6de9cd9a | 1836 | { |
5cd09fac | 1837 | int kind, seen_length; |
6de9cd9a DN |
1838 | gfc_charlen *cl; |
1839 | gfc_expr *len; | |
1840 | match m; | |
a8b3b0b6 | 1841 | gfc_expr *kind_expr = NULL; |
9d64df18 | 1842 | kind = gfc_default_character_kind; |
6de9cd9a DN |
1843 | len = NULL; |
1844 | seen_length = 0; | |
1845 | ||
1846 | /* Try the old-style specification first. */ | |
1847 | old_char_selector = 0; | |
1848 | ||
1849 | m = match_char_length (&len); | |
1850 | if (m != MATCH_NO) | |
1851 | { | |
1852 | if (m == MATCH_YES) | |
1853 | old_char_selector = 1; | |
1854 | seen_length = 1; | |
1855 | goto done; | |
1856 | } | |
1857 | ||
1858 | m = gfc_match_char ('('); | |
1859 | if (m != MATCH_YES) | |
1860 | { | |
a8b3b0b6 | 1861 | m = MATCH_YES; /* Character without length is a single char. */ |
6de9cd9a DN |
1862 | goto done; |
1863 | } | |
1864 | ||
a8b3b0b6 | 1865 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ |
6de9cd9a DN |
1866 | if (gfc_match (" kind =") == MATCH_YES) |
1867 | { | |
a8b3b0b6 CR |
1868 | m = gfc_match_small_int_expr(&kind, &kind_expr); |
1869 | ||
6de9cd9a DN |
1870 | if (m == MATCH_ERROR) |
1871 | goto done; | |
1872 | if (m == MATCH_NO) | |
1873 | goto syntax; | |
1874 | ||
1875 | if (gfc_match (" , len =") == MATCH_NO) | |
1876 | goto rparen; | |
1877 | ||
1878 | m = char_len_param_value (&len); | |
1879 | if (m == MATCH_NO) | |
1880 | goto syntax; | |
1881 | if (m == MATCH_ERROR) | |
1882 | goto done; | |
1883 | seen_length = 1; | |
1884 | ||
1885 | goto rparen; | |
1886 | } | |
1887 | ||
66e4ab31 | 1888 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ |
6de9cd9a DN |
1889 | if (gfc_match (" len =") == MATCH_YES) |
1890 | { | |
1891 | m = char_len_param_value (&len); | |
1892 | if (m == MATCH_NO) | |
1893 | goto syntax; | |
1894 | if (m == MATCH_ERROR) | |
1895 | goto done; | |
1896 | seen_length = 1; | |
1897 | ||
1898 | if (gfc_match_char (')') == MATCH_YES) | |
1899 | goto done; | |
1900 | ||
1901 | if (gfc_match (" , kind =") != MATCH_YES) | |
1902 | goto syntax; | |
1903 | ||
a8b3b0b6 | 1904 | gfc_match_small_int_expr(&kind, &kind_expr); |
6de9cd9a | 1905 | |
e7a2d5fb | 1906 | if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
6de9cd9a DN |
1907 | { |
1908 | gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); | |
1909 | return MATCH_YES; | |
1910 | } | |
1911 | ||
1912 | goto rparen; | |
1913 | } | |
1914 | ||
66e4ab31 | 1915 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
6de9cd9a DN |
1916 | m = char_len_param_value (&len); |
1917 | if (m == MATCH_NO) | |
1918 | goto syntax; | |
1919 | if (m == MATCH_ERROR) | |
1920 | goto done; | |
1921 | seen_length = 1; | |
1922 | ||
1923 | m = gfc_match_char (')'); | |
1924 | if (m == MATCH_YES) | |
1925 | goto done; | |
1926 | ||
1927 | if (gfc_match_char (',') != MATCH_YES) | |
1928 | goto syntax; | |
1929 | ||
a8b3b0b6 | 1930 | gfc_match (" kind ="); /* Gobble optional text. */ |
6de9cd9a | 1931 | |
a8b3b0b6 | 1932 | m = gfc_match_small_int_expr(&kind, &kind_expr); |
6de9cd9a DN |
1933 | if (m == MATCH_ERROR) |
1934 | goto done; | |
1935 | if (m == MATCH_NO) | |
1936 | goto syntax; | |
1937 | ||
1938 | rparen: | |
1939 | /* Require a right-paren at this point. */ | |
1940 | m = gfc_match_char (')'); | |
1941 | if (m == MATCH_YES) | |
1942 | goto done; | |
1943 | ||
1944 | syntax: | |
1945 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
1946 | m = MATCH_ERROR; | |
16f8ffc8 JD |
1947 | gfc_free_expr (len); |
1948 | return m; | |
6de9cd9a DN |
1949 | |
1950 | done: | |
16f8ffc8 | 1951 | if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
6de9cd9a DN |
1952 | { |
1953 | gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); | |
1954 | m = MATCH_ERROR; | |
1955 | } | |
1956 | ||
16f8ffc8 JD |
1957 | if (seen_length == 1 && len != NULL |
1958 | && len->ts.type != BT_INTEGER && len->ts.type != BT_UNKNOWN) | |
1959 | { | |
1960 | gfc_error ("Expression at %C must be of INTEGER type"); | |
1961 | m = MATCH_ERROR; | |
1962 | } | |
1963 | ||
6de9cd9a DN |
1964 | if (m != MATCH_YES) |
1965 | { | |
1966 | gfc_free_expr (len); | |
a8b3b0b6 | 1967 | gfc_free_expr (kind_expr); |
6de9cd9a DN |
1968 | return m; |
1969 | } | |
1970 | ||
1971 | /* Do some final massaging of the length values. */ | |
1972 | cl = gfc_get_charlen (); | |
1973 | cl->next = gfc_current_ns->cl_list; | |
1974 | gfc_current_ns->cl_list = cl; | |
1975 | ||
1976 | if (seen_length == 0) | |
1977 | cl->length = gfc_int_expr (1); | |
1978 | else | |
5cd09fac | 1979 | cl->length = len; |
6de9cd9a DN |
1980 | |
1981 | ts->cl = cl; | |
1982 | ts->kind = kind; | |
1983 | ||
a8b3b0b6 CR |
1984 | /* We have to know if it was a c interoperable kind so we can |
1985 | do accurate type checking of bind(c) procs, etc. */ | |
1986 | if (kind_expr != NULL) | |
1987 | { | |
1988 | /* Mark this as c interoperable if being declared with one | |
1989 | of the named constants from iso_c_binding. */ | |
1990 | ts->is_c_interop = kind_expr->ts.is_iso_c; | |
1991 | gfc_free_expr (kind_expr); | |
1992 | } | |
1993 | else if (len != NULL) | |
1994 | { | |
1995 | /* Here, we might have parsed something such as: | |
1996 | character(c_char) | |
1997 | In this case, the parsing code above grabs the c_char when | |
1998 | looking for the length (line 1690, roughly). it's the last | |
1999 | testcase for parsing the kind params of a character variable. | |
2000 | However, it's not actually the length. this seems like it | |
2001 | could be an error. | |
2002 | To see if the user used a C interop kind, test the expr | |
2003 | of the so called length, and see if it's C interoperable. */ | |
2004 | ts->is_c_interop = len->ts.is_iso_c; | |
2005 | } | |
2006 | ||
6de9cd9a DN |
2007 | return MATCH_YES; |
2008 | } | |
2009 | ||
2010 | ||
2011 | /* Matches a type specification. If successful, sets the ts structure | |
2012 | to the matched specification. This is necessary for FUNCTION and | |
2013 | IMPLICIT statements. | |
2014 | ||
d51347f9 | 2015 | If implicit_flag is nonzero, then we don't check for the optional |
e5ddaa24 | 2016 | kind specification. Not doing so is needed for matching an IMPLICIT |
6de9cd9a DN |
2017 | statement correctly. */ |
2018 | ||
e5ddaa24 | 2019 | static match |
636dff67 | 2020 | match_type_spec (gfc_typespec *ts, int implicit_flag) |
6de9cd9a DN |
2021 | { |
2022 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2023 | gfc_symbol *sym; | |
2024 | match m; | |
0ff0dfbf | 2025 | int c; |
6de9cd9a DN |
2026 | |
2027 | gfc_clear_ts (ts); | |
2028 | ||
a8b3b0b6 CR |
2029 | /* Clear the current binding label, in case one is given. */ |
2030 | curr_binding_label[0] = '\0'; | |
2031 | ||
5f700e6d AL |
2032 | if (gfc_match (" byte") == MATCH_YES) |
2033 | { | |
d51347f9 | 2034 | if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C") |
5f700e6d AL |
2035 | == FAILURE) |
2036 | return MATCH_ERROR; | |
2037 | ||
2038 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
2039 | { | |
2040 | gfc_error ("BYTE type used at %C " | |
2041 | "is not available on the target machine"); | |
2042 | return MATCH_ERROR; | |
2043 | } | |
d51347f9 | 2044 | |
5f700e6d AL |
2045 | ts->type = BT_INTEGER; |
2046 | ts->kind = 1; | |
2047 | return MATCH_YES; | |
2048 | } | |
2049 | ||
6de9cd9a DN |
2050 | if (gfc_match (" integer") == MATCH_YES) |
2051 | { | |
2052 | ts->type = BT_INTEGER; | |
9d64df18 | 2053 | ts->kind = gfc_default_integer_kind; |
6de9cd9a DN |
2054 | goto get_kind; |
2055 | } | |
2056 | ||
2057 | if (gfc_match (" character") == MATCH_YES) | |
2058 | { | |
2059 | ts->type = BT_CHARACTER; | |
e5ddaa24 TS |
2060 | if (implicit_flag == 0) |
2061 | return match_char_spec (ts); | |
2062 | else | |
2063 | return MATCH_YES; | |
6de9cd9a DN |
2064 | } |
2065 | ||
2066 | if (gfc_match (" real") == MATCH_YES) | |
2067 | { | |
2068 | ts->type = BT_REAL; | |
9d64df18 | 2069 | ts->kind = gfc_default_real_kind; |
6de9cd9a DN |
2070 | goto get_kind; |
2071 | } | |
2072 | ||
2073 | if (gfc_match (" double precision") == MATCH_YES) | |
2074 | { | |
2075 | ts->type = BT_REAL; | |
9d64df18 | 2076 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
2077 | return MATCH_YES; |
2078 | } | |
2079 | ||
2080 | if (gfc_match (" complex") == MATCH_YES) | |
2081 | { | |
2082 | ts->type = BT_COMPLEX; | |
9d64df18 | 2083 | ts->kind = gfc_default_complex_kind; |
6de9cd9a DN |
2084 | goto get_kind; |
2085 | } | |
2086 | ||
2087 | if (gfc_match (" double complex") == MATCH_YES) | |
2088 | { | |
df8652dc SK |
2089 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
2090 | "conform to the Fortran 95 standard") == FAILURE) | |
2091 | return MATCH_ERROR; | |
2092 | ||
6de9cd9a | 2093 | ts->type = BT_COMPLEX; |
9d64df18 | 2094 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
2095 | return MATCH_YES; |
2096 | } | |
2097 | ||
2098 | if (gfc_match (" logical") == MATCH_YES) | |
2099 | { | |
2100 | ts->type = BT_LOGICAL; | |
9d64df18 | 2101 | ts->kind = gfc_default_logical_kind; |
6de9cd9a DN |
2102 | goto get_kind; |
2103 | } | |
2104 | ||
2105 | m = gfc_match (" type ( %n )", name); | |
2106 | if (m != MATCH_YES) | |
2107 | return m; | |
2108 | ||
2109 | /* Search for the name but allow the components to be defined later. */ | |
2110 | if (gfc_get_ha_symbol (name, &sym)) | |
2111 | { | |
2112 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2113 | return MATCH_ERROR; | |
2114 | } | |
2115 | ||
2116 | if (sym->attr.flavor != FL_DERIVED | |
231b2fcc | 2117 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
2118 | return MATCH_ERROR; |
2119 | ||
2120 | ts->type = BT_DERIVED; | |
2121 | ts->kind = 0; | |
2122 | ts->derived = sym; | |
2123 | ||
2124 | return MATCH_YES; | |
2125 | ||
2126 | get_kind: | |
2127 | /* For all types except double, derived and character, look for an | |
2128 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
e5ddaa24 | 2129 | if (implicit_flag == 1) |
6de9cd9a DN |
2130 | return MATCH_YES; |
2131 | ||
0ff0dfbf TS |
2132 | if (gfc_current_form == FORM_FREE) |
2133 | { | |
2134 | c = gfc_peek_char(); | |
2135 | if (!gfc_is_whitespace(c) && c != '*' && c != '(' | |
636dff67 | 2136 | && c != ':' && c != ',') |
0ff0dfbf TS |
2137 | return MATCH_NO; |
2138 | } | |
2139 | ||
6de9cd9a DN |
2140 | m = gfc_match_kind_spec (ts); |
2141 | if (m == MATCH_NO && ts->type != BT_CHARACTER) | |
2142 | m = gfc_match_old_kind_spec (ts); | |
2143 | ||
2144 | if (m == MATCH_NO) | |
2145 | m = MATCH_YES; /* No kind specifier found. */ | |
2146 | ||
2147 | return m; | |
2148 | } | |
2149 | ||
2150 | ||
e5ddaa24 TS |
2151 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
2152 | already matched in parse.c, or we would not end up here in the | |
2153 | first place. So the only thing we need to check, is if there is | |
2154 | trailing garbage. If not, the match is successful. */ | |
2155 | ||
2156 | match | |
2157 | gfc_match_implicit_none (void) | |
2158 | { | |
e5ddaa24 TS |
2159 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
2160 | } | |
2161 | ||
2162 | ||
2163 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
2164 | ||
2165 | static match | |
1107b970 | 2166 | match_implicit_range (void) |
e5ddaa24 TS |
2167 | { |
2168 | int c, c1, c2, inner; | |
2169 | locus cur_loc; | |
2170 | ||
2171 | cur_loc = gfc_current_locus; | |
2172 | ||
2173 | gfc_gobble_whitespace (); | |
2174 | c = gfc_next_char (); | |
2175 | if (c != '(') | |
2176 | { | |
2177 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
2178 | goto bad; | |
2179 | } | |
2180 | ||
2181 | inner = 1; | |
2182 | while (inner) | |
2183 | { | |
2184 | gfc_gobble_whitespace (); | |
2185 | c1 = gfc_next_char (); | |
2186 | if (!ISALPHA (c1)) | |
2187 | goto bad; | |
2188 | ||
2189 | gfc_gobble_whitespace (); | |
2190 | c = gfc_next_char (); | |
2191 | ||
2192 | switch (c) | |
2193 | { | |
2194 | case ')': | |
66e4ab31 | 2195 | inner = 0; /* Fall through. */ |
e5ddaa24 TS |
2196 | |
2197 | case ',': | |
2198 | c2 = c1; | |
2199 | break; | |
2200 | ||
2201 | case '-': | |
2202 | gfc_gobble_whitespace (); | |
2203 | c2 = gfc_next_char (); | |
2204 | if (!ISALPHA (c2)) | |
2205 | goto bad; | |
2206 | ||
2207 | gfc_gobble_whitespace (); | |
2208 | c = gfc_next_char (); | |
2209 | ||
2210 | if ((c != ',') && (c != ')')) | |
2211 | goto bad; | |
2212 | if (c == ')') | |
2213 | inner = 0; | |
2214 | ||
2215 | break; | |
2216 | ||
2217 | default: | |
2218 | goto bad; | |
2219 | } | |
2220 | ||
2221 | if (c1 > c2) | |
2222 | { | |
2223 | gfc_error ("Letters must be in alphabetic order in " | |
2224 | "IMPLICIT statement at %C"); | |
2225 | goto bad; | |
2226 | } | |
2227 | ||
2228 | /* See if we can add the newly matched range to the pending | |
636dff67 SK |
2229 | implicits from this IMPLICIT statement. We do not check for |
2230 | conflicts with whatever earlier IMPLICIT statements may have | |
2231 | set. This is done when we've successfully finished matching | |
2232 | the current one. */ | |
1107b970 | 2233 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
e5ddaa24 TS |
2234 | goto bad; |
2235 | } | |
2236 | ||
2237 | return MATCH_YES; | |
2238 | ||
2239 | bad: | |
2240 | gfc_syntax_error (ST_IMPLICIT); | |
2241 | ||
2242 | gfc_current_locus = cur_loc; | |
2243 | return MATCH_ERROR; | |
2244 | } | |
2245 | ||
2246 | ||
2247 | /* Match an IMPLICIT statement, storing the types for | |
2248 | gfc_set_implicit() if the statement is accepted by the parser. | |
2249 | There is a strange looking, but legal syntactic construction | |
2250 | possible. It looks like: | |
2251 | ||
2252 | IMPLICIT INTEGER (a-b) (c-d) | |
2253 | ||
2254 | This is legal if "a-b" is a constant expression that happens to | |
2255 | equal one of the legal kinds for integers. The real problem | |
2256 | happens with an implicit specification that looks like: | |
2257 | ||
2258 | IMPLICIT INTEGER (a-b) | |
2259 | ||
2260 | In this case, a typespec matcher that is "greedy" (as most of the | |
2261 | matchers are) gobbles the character range as a kindspec, leaving | |
2262 | nothing left. We therefore have to go a bit more slowly in the | |
2263 | matching process by inhibiting the kindspec checking during | |
2264 | typespec matching and checking for a kind later. */ | |
2265 | ||
2266 | match | |
2267 | gfc_match_implicit (void) | |
2268 | { | |
2269 | gfc_typespec ts; | |
2270 | locus cur_loc; | |
2271 | int c; | |
2272 | match m; | |
2273 | ||
2274 | /* We don't allow empty implicit statements. */ | |
2275 | if (gfc_match_eos () == MATCH_YES) | |
2276 | { | |
2277 | gfc_error ("Empty IMPLICIT statement at %C"); | |
2278 | return MATCH_ERROR; | |
2279 | } | |
2280 | ||
e5ddaa24 TS |
2281 | do |
2282 | { | |
1107b970 PB |
2283 | /* First cleanup. */ |
2284 | gfc_clear_new_implicit (); | |
2285 | ||
e5ddaa24 TS |
2286 | /* A basic type is mandatory here. */ |
2287 | m = match_type_spec (&ts, 1); | |
2288 | if (m == MATCH_ERROR) | |
2289 | goto error; | |
2290 | if (m == MATCH_NO) | |
2291 | goto syntax; | |
2292 | ||
2293 | cur_loc = gfc_current_locus; | |
1107b970 | 2294 | m = match_implicit_range (); |
e5ddaa24 TS |
2295 | |
2296 | if (m == MATCH_YES) | |
2297 | { | |
1107b970 | 2298 | /* We may have <TYPE> (<RANGE>). */ |
e5ddaa24 TS |
2299 | gfc_gobble_whitespace (); |
2300 | c = gfc_next_char (); | |
2301 | if ((c == '\n') || (c == ',')) | |
1107b970 PB |
2302 | { |
2303 | /* Check for CHARACTER with no length parameter. */ | |
2304 | if (ts.type == BT_CHARACTER && !ts.cl) | |
2305 | { | |
9d64df18 | 2306 | ts.kind = gfc_default_character_kind; |
1107b970 PB |
2307 | ts.cl = gfc_get_charlen (); |
2308 | ts.cl->next = gfc_current_ns->cl_list; | |
2309 | gfc_current_ns->cl_list = ts.cl; | |
2310 | ts.cl->length = gfc_int_expr (1); | |
2311 | } | |
2312 | ||
2313 | /* Record the Successful match. */ | |
2314 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2315 | return MATCH_ERROR; | |
2316 | continue; | |
2317 | } | |
e5ddaa24 TS |
2318 | |
2319 | gfc_current_locus = cur_loc; | |
2320 | } | |
2321 | ||
1107b970 PB |
2322 | /* Discard the (incorrectly) matched range. */ |
2323 | gfc_clear_new_implicit (); | |
2324 | ||
2325 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
2326 | if (ts.type == BT_CHARACTER) | |
2327 | m = match_char_spec (&ts); | |
2328 | else | |
e5ddaa24 | 2329 | { |
1107b970 | 2330 | m = gfc_match_kind_spec (&ts); |
e5ddaa24 | 2331 | if (m == MATCH_NO) |
1107b970 PB |
2332 | { |
2333 | m = gfc_match_old_kind_spec (&ts); | |
2334 | if (m == MATCH_ERROR) | |
2335 | goto error; | |
2336 | if (m == MATCH_NO) | |
2337 | goto syntax; | |
2338 | } | |
e5ddaa24 | 2339 | } |
1107b970 PB |
2340 | if (m == MATCH_ERROR) |
2341 | goto error; | |
e5ddaa24 | 2342 | |
1107b970 | 2343 | m = match_implicit_range (); |
e5ddaa24 TS |
2344 | if (m == MATCH_ERROR) |
2345 | goto error; | |
2346 | if (m == MATCH_NO) | |
2347 | goto syntax; | |
2348 | ||
2349 | gfc_gobble_whitespace (); | |
2350 | c = gfc_next_char (); | |
2351 | if ((c != '\n') && (c != ',')) | |
2352 | goto syntax; | |
2353 | ||
1107b970 PB |
2354 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2355 | return MATCH_ERROR; | |
e5ddaa24 TS |
2356 | } |
2357 | while (c == ','); | |
2358 | ||
1107b970 | 2359 | return MATCH_YES; |
e5ddaa24 TS |
2360 | |
2361 | syntax: | |
2362 | gfc_syntax_error (ST_IMPLICIT); | |
2363 | ||
2364 | error: | |
2365 | return MATCH_ERROR; | |
2366 | } | |
2367 | ||
66e4ab31 | 2368 | |
8998be20 TB |
2369 | match |
2370 | gfc_match_import (void) | |
2371 | { | |
2372 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2373 | match m; | |
2374 | gfc_symbol *sym; | |
2375 | gfc_symtree *st; | |
2376 | ||
66e4ab31 SK |
2377 | if (gfc_current_ns->proc_name == NULL |
2378 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
8998be20 TB |
2379 | { |
2380 | gfc_error ("IMPORT statement at %C only permitted in " | |
2381 | "an INTERFACE body"); | |
2382 | return MATCH_ERROR; | |
2383 | } | |
2384 | ||
636dff67 | 2385 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
8998be20 TB |
2386 | == FAILURE) |
2387 | return MATCH_ERROR; | |
2388 | ||
2389 | if (gfc_match_eos () == MATCH_YES) | |
2390 | { | |
2391 | /* All host variables should be imported. */ | |
2392 | gfc_current_ns->has_import_set = 1; | |
2393 | return MATCH_YES; | |
2394 | } | |
2395 | ||
2396 | if (gfc_match (" ::") == MATCH_YES) | |
2397 | { | |
2398 | if (gfc_match_eos () == MATCH_YES) | |
636dff67 SK |
2399 | { |
2400 | gfc_error ("Expecting list of named entities at %C"); | |
2401 | return MATCH_ERROR; | |
2402 | } | |
8998be20 TB |
2403 | } |
2404 | ||
2405 | for(;;) | |
2406 | { | |
2407 | m = gfc_match (" %n", name); | |
2408 | switch (m) | |
2409 | { | |
2410 | case MATCH_YES: | |
36d3fb4c | 2411 | if (gfc_current_ns->parent != NULL |
66e4ab31 | 2412 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
36d3fb4c PT |
2413 | { |
2414 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2415 | return MATCH_ERROR; | |
2416 | } | |
2417 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
66e4ab31 SK |
2418 | && gfc_find_symbol (name, |
2419 | gfc_current_ns->proc_name->ns->parent, | |
2420 | 1, &sym)) | |
636dff67 SK |
2421 | { |
2422 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2423 | return MATCH_ERROR; | |
2424 | } | |
2425 | ||
2426 | if (sym == NULL) | |
2427 | { | |
2428 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2429 | "at %C - does not exist.", name); | |
2430 | return MATCH_ERROR; | |
2431 | } | |
2432 | ||
d51347f9 | 2433 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) |
636dff67 SK |
2434 | { |
2435 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2436 | "at %C.", name); | |
2437 | goto next_item; | |
2438 | } | |
2439 | ||
2440 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
2441 | st->n.sym = sym; | |
2442 | sym->refs++; | |
5a8af0b4 | 2443 | sym->attr.imported = 1; |
8998be20 TB |
2444 | |
2445 | goto next_item; | |
2446 | ||
2447 | case MATCH_NO: | |
2448 | break; | |
2449 | ||
2450 | case MATCH_ERROR: | |
2451 | return MATCH_ERROR; | |
2452 | } | |
2453 | ||
2454 | next_item: | |
2455 | if (gfc_match_eos () == MATCH_YES) | |
2456 | break; | |
2457 | if (gfc_match_char (',') != MATCH_YES) | |
2458 | goto syntax; | |
2459 | } | |
2460 | ||
2461 | return MATCH_YES; | |
2462 | ||
2463 | syntax: | |
2464 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2465 | return MATCH_ERROR; | |
2466 | } | |
e5ddaa24 | 2467 | |
66e4ab31 | 2468 | |
6de9cd9a DN |
2469 | /* Matches an attribute specification including array specs. If |
2470 | successful, leaves the variables current_attr and current_as | |
2471 | holding the specification. Also sets the colon_seen variable for | |
2472 | later use by matchers associated with initializations. | |
2473 | ||
2474 | This subroutine is a little tricky in the sense that we don't know | |
2475 | if we really have an attr-spec until we hit the double colon. | |
2476 | Until that time, we can only return MATCH_NO. This forces us to | |
2477 | check for duplicate specification at this level. */ | |
2478 | ||
2479 | static match | |
2480 | match_attr_spec (void) | |
2481 | { | |
6de9cd9a DN |
2482 | /* Modifiers that can exist in a type statement. */ |
2483 | typedef enum | |
2484 | { GFC_DECL_BEGIN = 0, | |
2485 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
2486 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
ee7e677f TB |
2487 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
2488 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
a8b3b0b6 | 2489 | DECL_IS_BIND_C, DECL_COLON, DECL_NONE, |
6de9cd9a DN |
2490 | GFC_DECL_END /* Sentinel */ |
2491 | } | |
2492 | decl_types; | |
2493 | ||
2494 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
2495 | #define NUM_DECL GFC_DECL_END | |
2496 | ||
2497 | static mstring decls[] = { | |
2498 | minit (", allocatable", DECL_ALLOCATABLE), | |
2499 | minit (", dimension", DECL_DIMENSION), | |
2500 | minit (", external", DECL_EXTERNAL), | |
2501 | minit (", intent ( in )", DECL_IN), | |
2502 | minit (", intent ( out )", DECL_OUT), | |
2503 | minit (", intent ( in out )", DECL_INOUT), | |
2504 | minit (", intrinsic", DECL_INTRINSIC), | |
2505 | minit (", optional", DECL_OPTIONAL), | |
2506 | minit (", parameter", DECL_PARAMETER), | |
2507 | minit (", pointer", DECL_POINTER), | |
ee7e677f | 2508 | minit (", protected", DECL_PROTECTED), |
6de9cd9a DN |
2509 | minit (", private", DECL_PRIVATE), |
2510 | minit (", public", DECL_PUBLIC), | |
2511 | minit (", save", DECL_SAVE), | |
2512 | minit (", target", DECL_TARGET), | |
06469efd | 2513 | minit (", value", DECL_VALUE), |
775e6c3a | 2514 | minit (", volatile", DECL_VOLATILE), |
6de9cd9a DN |
2515 | minit ("::", DECL_COLON), |
2516 | minit (NULL, DECL_NONE) | |
2517 | }; | |
2518 | ||
2519 | locus start, seen_at[NUM_DECL]; | |
2520 | int seen[NUM_DECL]; | |
2521 | decl_types d; | |
2522 | const char *attr; | |
2523 | match m; | |
2524 | try t; | |
a8b3b0b6 | 2525 | char peek_char; |
6de9cd9a DN |
2526 | |
2527 | gfc_clear_attr (¤t_attr); | |
63645982 | 2528 | start = gfc_current_locus; |
6de9cd9a DN |
2529 | |
2530 | current_as = NULL; | |
2531 | colon_seen = 0; | |
2532 | ||
2533 | /* See if we get all of the keywords up to the final double colon. */ | |
2534 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2535 | seen[d] = 0; | |
2536 | ||
2537 | for (;;) | |
2538 | { | |
2539 | d = (decl_types) gfc_match_strings (decls); | |
a8b3b0b6 CR |
2540 | |
2541 | if (d == DECL_NONE) | |
2542 | { | |
2543 | /* See if we can find the bind(c) since all else failed. | |
2544 | We need to skip over any whitespace and stop on the ','. */ | |
2545 | gfc_gobble_whitespace (); | |
2546 | peek_char = gfc_peek_char (); | |
2547 | if (peek_char == ',') | |
2548 | { | |
2549 | /* Chomp the comma. */ | |
2550 | peek_char = gfc_next_char (); | |
2551 | /* Try and match the bind(c). */ | |
129d15a3 JW |
2552 | m = gfc_match_bind_c (NULL); |
2553 | if (m == MATCH_YES) | |
a8b3b0b6 | 2554 | d = DECL_IS_BIND_C; |
129d15a3 JW |
2555 | else if (m == MATCH_ERROR) |
2556 | goto cleanup; | |
a8b3b0b6 CR |
2557 | } |
2558 | } | |
d468bcdb | 2559 | |
6de9cd9a DN |
2560 | if (d == DECL_NONE || d == DECL_COLON) |
2561 | break; | |
d51347f9 | 2562 | |
6de9cd9a | 2563 | seen[d]++; |
63645982 | 2564 | seen_at[d] = gfc_current_locus; |
6de9cd9a DN |
2565 | |
2566 | if (d == DECL_DIMENSION) | |
2567 | { | |
2568 | m = gfc_match_array_spec (¤t_as); | |
2569 | ||
2570 | if (m == MATCH_NO) | |
2571 | { | |
2572 | gfc_error ("Missing dimension specification at %C"); | |
2573 | m = MATCH_ERROR; | |
2574 | } | |
2575 | ||
2576 | if (m == MATCH_ERROR) | |
2577 | goto cleanup; | |
2578 | } | |
2579 | } | |
2580 | ||
2581 | /* No double colon, so assume that we've been looking at something | |
2582 | else the whole time. */ | |
2583 | if (d == DECL_NONE) | |
2584 | { | |
2585 | m = MATCH_NO; | |
2586 | goto cleanup; | |
2587 | } | |
2588 | ||
2589 | /* Since we've seen a double colon, we have to be looking at an | |
2590 | attr-spec. This means that we can now issue errors. */ | |
2591 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2592 | if (seen[d] > 1) | |
2593 | { | |
2594 | switch (d) | |
2595 | { | |
2596 | case DECL_ALLOCATABLE: | |
2597 | attr = "ALLOCATABLE"; | |
2598 | break; | |
2599 | case DECL_DIMENSION: | |
2600 | attr = "DIMENSION"; | |
2601 | break; | |
2602 | case DECL_EXTERNAL: | |
2603 | attr = "EXTERNAL"; | |
2604 | break; | |
2605 | case DECL_IN: | |
2606 | attr = "INTENT (IN)"; | |
2607 | break; | |
2608 | case DECL_OUT: | |
2609 | attr = "INTENT (OUT)"; | |
2610 | break; | |
2611 | case DECL_INOUT: | |
2612 | attr = "INTENT (IN OUT)"; | |
2613 | break; | |
2614 | case DECL_INTRINSIC: | |
2615 | attr = "INTRINSIC"; | |
2616 | break; | |
2617 | case DECL_OPTIONAL: | |
2618 | attr = "OPTIONAL"; | |
2619 | break; | |
2620 | case DECL_PARAMETER: | |
2621 | attr = "PARAMETER"; | |
2622 | break; | |
2623 | case DECL_POINTER: | |
2624 | attr = "POINTER"; | |
2625 | break; | |
ee7e677f TB |
2626 | case DECL_PROTECTED: |
2627 | attr = "PROTECTED"; | |
2628 | break; | |
6de9cd9a DN |
2629 | case DECL_PRIVATE: |
2630 | attr = "PRIVATE"; | |
2631 | break; | |
2632 | case DECL_PUBLIC: | |
2633 | attr = "PUBLIC"; | |
2634 | break; | |
2635 | case DECL_SAVE: | |
2636 | attr = "SAVE"; | |
2637 | break; | |
2638 | case DECL_TARGET: | |
2639 | attr = "TARGET"; | |
2640 | break; | |
a8b3b0b6 CR |
2641 | case DECL_IS_BIND_C: |
2642 | attr = "IS_BIND_C"; | |
2643 | break; | |
2644 | case DECL_VALUE: | |
2645 | attr = "VALUE"; | |
2646 | break; | |
775e6c3a TB |
2647 | case DECL_VOLATILE: |
2648 | attr = "VOLATILE"; | |
2649 | break; | |
6de9cd9a | 2650 | default: |
66e4ab31 | 2651 | attr = NULL; /* This shouldn't happen. */ |
6de9cd9a DN |
2652 | } |
2653 | ||
2654 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
2655 | m = MATCH_ERROR; | |
2656 | goto cleanup; | |
2657 | } | |
2658 | ||
2659 | /* Now that we've dealt with duplicate attributes, add the attributes | |
2660 | to the current attribute. */ | |
2661 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2662 | { | |
2663 | if (seen[d] == 0) | |
2664 | continue; | |
2665 | ||
2666 | if (gfc_current_state () == COMP_DERIVED | |
2667 | && d != DECL_DIMENSION && d != DECL_POINTER | |
d51347f9 TB |
2668 | && d != DECL_COLON && d != DECL_PRIVATE |
2669 | && d != DECL_PUBLIC && d != DECL_NONE) | |
6de9cd9a | 2670 | { |
5046aff5 PT |
2671 | if (d == DECL_ALLOCATABLE) |
2672 | { | |
636dff67 SK |
2673 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
2674 | "attribute at %C in a TYPE definition") | |
d51347f9 | 2675 | == FAILURE) |
5046aff5 PT |
2676 | { |
2677 | m = MATCH_ERROR; | |
2678 | goto cleanup; | |
2679 | } | |
636dff67 SK |
2680 | } |
2681 | else | |
5046aff5 PT |
2682 | { |
2683 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
d51347f9 | 2684 | &seen_at[d]); |
5046aff5 PT |
2685 | m = MATCH_ERROR; |
2686 | goto cleanup; | |
2687 | } | |
6de9cd9a DN |
2688 | } |
2689 | ||
4213f93b | 2690 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
636dff67 | 2691 | && gfc_current_state () != COMP_MODULE) |
4213f93b PT |
2692 | { |
2693 | if (d == DECL_PRIVATE) | |
2694 | attr = "PRIVATE"; | |
2695 | else | |
2696 | attr = "PUBLIC"; | |
d51347f9 TB |
2697 | if (gfc_current_state () == COMP_DERIVED |
2698 | && gfc_state_stack->previous | |
2699 | && gfc_state_stack->previous->state == COMP_MODULE) | |
2700 | { | |
2701 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s " | |
2702 | "at %L in a TYPE definition", attr, | |
2703 | &seen_at[d]) | |
2704 | == FAILURE) | |
2705 | { | |
2706 | m = MATCH_ERROR; | |
2707 | goto cleanup; | |
2708 | } | |
2709 | } | |
2710 | else | |
2711 | { | |
2712 | gfc_error ("%s attribute at %L is not allowed outside of the " | |
2713 | "specification part of a module", attr, &seen_at[d]); | |
2714 | m = MATCH_ERROR; | |
2715 | goto cleanup; | |
2716 | } | |
4213f93b PT |
2717 | } |
2718 | ||
6de9cd9a DN |
2719 | switch (d) |
2720 | { | |
2721 | case DECL_ALLOCATABLE: | |
2722 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
2723 | break; | |
2724 | ||
2725 | case DECL_DIMENSION: | |
231b2fcc | 2726 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
2727 | break; |
2728 | ||
2729 | case DECL_EXTERNAL: | |
2730 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
2731 | break; | |
2732 | ||
2733 | case DECL_IN: | |
2734 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
2735 | break; | |
2736 | ||
2737 | case DECL_OUT: | |
2738 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
2739 | break; | |
2740 | ||
2741 | case DECL_INOUT: | |
2742 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
2743 | break; | |
2744 | ||
2745 | case DECL_INTRINSIC: | |
2746 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
2747 | break; | |
2748 | ||
2749 | case DECL_OPTIONAL: | |
2750 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
2751 | break; | |
2752 | ||
2753 | case DECL_PARAMETER: | |
231b2fcc | 2754 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
6de9cd9a DN |
2755 | break; |
2756 | ||
2757 | case DECL_POINTER: | |
2758 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
2759 | break; | |
2760 | ||
ee7e677f TB |
2761 | case DECL_PROTECTED: |
2762 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
2763 | { | |
2764 | gfc_error ("PROTECTED at %C only allowed in specification " | |
2765 | "part of a module"); | |
2766 | t = FAILURE; | |
2767 | break; | |
2768 | } | |
2769 | ||
636dff67 SK |
2770 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
2771 | "attribute at %C") | |
ee7e677f TB |
2772 | == FAILURE) |
2773 | t = FAILURE; | |
2774 | else | |
2775 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
2776 | break; | |
2777 | ||
6de9cd9a | 2778 | case DECL_PRIVATE: |
231b2fcc TS |
2779 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
2780 | &seen_at[d]); | |
6de9cd9a DN |
2781 | break; |
2782 | ||
2783 | case DECL_PUBLIC: | |
231b2fcc TS |
2784 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
2785 | &seen_at[d]); | |
6de9cd9a DN |
2786 | break; |
2787 | ||
2788 | case DECL_SAVE: | |
231b2fcc | 2789 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
2790 | break; |
2791 | ||
2792 | case DECL_TARGET: | |
2793 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
2794 | break; | |
2795 | ||
a8b3b0b6 CR |
2796 | case DECL_IS_BIND_C: |
2797 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); | |
2798 | break; | |
2799 | ||
06469efd | 2800 | case DECL_VALUE: |
636dff67 SK |
2801 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
2802 | "at %C") | |
06469efd PT |
2803 | == FAILURE) |
2804 | t = FAILURE; | |
2805 | else | |
2806 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
2807 | break; | |
2808 | ||
775e6c3a TB |
2809 | case DECL_VOLATILE: |
2810 | if (gfc_notify_std (GFC_STD_F2003, | |
636dff67 | 2811 | "Fortran 2003: VOLATILE attribute at %C") |
775e6c3a TB |
2812 | == FAILURE) |
2813 | t = FAILURE; | |
2814 | else | |
2815 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
2816 | break; | |
2817 | ||
6de9cd9a DN |
2818 | default: |
2819 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
2820 | } | |
2821 | ||
2822 | if (t == FAILURE) | |
2823 | { | |
2824 | m = MATCH_ERROR; | |
2825 | goto cleanup; | |
2826 | } | |
2827 | } | |
2828 | ||
2829 | colon_seen = 1; | |
2830 | return MATCH_YES; | |
2831 | ||
2832 | cleanup: | |
63645982 | 2833 | gfc_current_locus = start; |
6de9cd9a DN |
2834 | gfc_free_array_spec (current_as); |
2835 | current_as = NULL; | |
2836 | return m; | |
2837 | } | |
2838 | ||
2839 | ||
a8b3b0b6 CR |
2840 | /* Set the binding label, dest_label, either with the binding label |
2841 | stored in the given gfc_typespec, ts, or if none was provided, it | |
2842 | will be the symbol name in all lower case, as required by the draft | |
2843 | (J3/04-007, section 15.4.1). If a binding label was given and | |
2844 | there is more than one argument (num_idents), it is an error. */ | |
2845 | ||
2846 | try | |
2847 | set_binding_label (char *dest_label, const char *sym_name, int num_idents) | |
2848 | { | |
2849 | if (curr_binding_label[0] != '\0') | |
2850 | { | |
2851 | if (num_idents > 1 || num_idents_on_line > 1) | |
2852 | { | |
2853 | gfc_error ("Multiple identifiers provided with " | |
2854 | "single NAME= specifier at %C"); | |
2855 | return FAILURE; | |
2856 | } | |
2857 | ||
2858 | /* Binding label given; store in temp holder til have sym. */ | |
2859 | strncpy (dest_label, curr_binding_label, | |
2860 | strlen (curr_binding_label) + 1); | |
2861 | } | |
2862 | else | |
2863 | { | |
2864 | /* No binding label given, and the NAME= specifier did not exist, | |
2865 | which means there was no NAME="". */ | |
2866 | if (sym_name != NULL && has_name_equals == 0) | |
2867 | strncpy (dest_label, sym_name, strlen (sym_name) + 1); | |
2868 | } | |
2869 | ||
2870 | return SUCCESS; | |
2871 | } | |
2872 | ||
2873 | ||
2874 | /* Set the status of the given common block as being BIND(C) or not, | |
2875 | depending on the given parameter, is_bind_c. */ | |
2876 | ||
2877 | void | |
2878 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) | |
2879 | { | |
2880 | com_block->is_bind_c = is_bind_c; | |
2881 | return; | |
2882 | } | |
2883 | ||
2884 | ||
2885 | /* Verify that the given gfc_typespec is for a C interoperable type. */ | |
2886 | ||
2887 | try | |
2888 | verify_c_interop (gfc_typespec *ts, const char *name, locus *where) | |
2889 | { | |
2890 | try t; | |
2891 | ||
2892 | /* Make sure the kind used is appropriate for the type. | |
2893 | The f90_type is unknown if an integer constant was | |
2894 | used (e.g., real(4), bind(c) :: myFloat). */ | |
2895 | if (ts->f90_type != BT_UNKNOWN) | |
2896 | { | |
2897 | t = gfc_validate_c_kind (ts); | |
2898 | if (t != SUCCESS) | |
2899 | { | |
2900 | /* Print an error, but continue parsing line. */ | |
2901 | gfc_error_now ("C kind parameter is for type %s but " | |
2902 | "symbol '%s' at %L is of type %s", | |
2903 | gfc_basic_typename (ts->f90_type), | |
2904 | name, where, | |
2905 | gfc_basic_typename (ts->type)); | |
2906 | } | |
2907 | } | |
2908 | ||
2909 | /* Make sure the kind is C interoperable. This does not care about the | |
2910 | possible error above. */ | |
2911 | if (ts->type == BT_DERIVED && ts->derived != NULL) | |
2912 | return (ts->derived->ts.is_c_interop ? SUCCESS : FAILURE); | |
2913 | else if (ts->is_c_interop != 1) | |
2914 | return FAILURE; | |
2915 | ||
2916 | return SUCCESS; | |
2917 | } | |
2918 | ||
2919 | ||
2920 | /* Verify that the variables of a given common block, which has been | |
2921 | defined with the attribute specifier bind(c), to be of a C | |
2922 | interoperable type. Errors will be reported here, if | |
2923 | encountered. */ | |
2924 | ||
2925 | try | |
2926 | verify_com_block_vars_c_interop (gfc_common_head *com_block) | |
2927 | { | |
2928 | gfc_symbol *curr_sym = NULL; | |
2929 | try retval = SUCCESS; | |
2930 | ||
2931 | curr_sym = com_block->head; | |
2932 | ||
2933 | /* Make sure we have at least one symbol. */ | |
2934 | if (curr_sym == NULL) | |
2935 | return retval; | |
2936 | ||
2937 | /* Here we know we have a symbol, so we'll execute this loop | |
2938 | at least once. */ | |
2939 | do | |
2940 | { | |
2941 | /* The second to last param, 1, says this is in a common block. */ | |
2942 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); | |
2943 | curr_sym = curr_sym->common_next; | |
2944 | } while (curr_sym != NULL); | |
2945 | ||
2946 | return retval; | |
2947 | } | |
2948 | ||
2949 | ||
2950 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, | |
2951 | an appropriate error message is reported. */ | |
2952 | ||
2953 | try | |
2954 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, | |
2955 | int is_in_common, gfc_common_head *com_block) | |
2956 | { | |
2957 | try retval = SUCCESS; | |
d8fa96e0 CR |
2958 | |
2959 | if (tmp_sym->attr.function && tmp_sym->result != NULL) | |
2960 | { | |
2961 | tmp_sym = tmp_sym->result; | |
2962 | /* Make sure it wasn't an implicitly typed result. */ | |
2963 | if (tmp_sym->attr.implicit_type) | |
2964 | { | |
2965 | gfc_warning ("Implicitly declared BIND(C) function '%s' at " | |
2966 | "%L may not be C interoperable", tmp_sym->name, | |
2967 | &tmp_sym->declared_at); | |
2968 | tmp_sym->ts.f90_type = tmp_sym->ts.type; | |
2969 | /* Mark it as C interoperable to prevent duplicate warnings. */ | |
2970 | tmp_sym->ts.is_c_interop = 1; | |
2971 | tmp_sym->attr.is_c_interop = 1; | |
2972 | } | |
2973 | } | |
a8b3b0b6 CR |
2974 | |
2975 | /* Here, we know we have the bind(c) attribute, so if we have | |
2976 | enough type info, then verify that it's a C interop kind. | |
2977 | The info could be in the symbol already, or possibly still in | |
2978 | the given ts (current_ts), so look in both. */ | |
2979 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) | |
2980 | { | |
2981 | if (verify_c_interop (&(tmp_sym->ts), tmp_sym->name, | |
2982 | &(tmp_sym->declared_at)) != SUCCESS) | |
2983 | { | |
2984 | /* See if we're dealing with a sym in a common block or not. */ | |
2985 | if (is_in_common == 1) | |
2986 | { | |
2987 | gfc_warning ("Variable '%s' in common block '%s' at %L " | |
2988 | "may not be a C interoperable " | |
2989 | "kind though common block '%s' is BIND(C)", | |
2990 | tmp_sym->name, com_block->name, | |
2991 | &(tmp_sym->declared_at), com_block->name); | |
2992 | } | |
2993 | else | |
2994 | { | |
2995 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) | |
2996 | gfc_error ("Type declaration '%s' at %L is not C " | |
2997 | "interoperable but it is BIND(C)", | |
2998 | tmp_sym->name, &(tmp_sym->declared_at)); | |
2999 | else | |
3000 | gfc_warning ("Variable '%s' at %L " | |
3001 | "may not be a C interoperable " | |
3002 | "kind but it is bind(c)", | |
3003 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3004 | } | |
3005 | } | |
3006 | ||
3007 | /* Variables declared w/in a common block can't be bind(c) | |
3008 | since there's no way for C to see these variables, so there's | |
3009 | semantically no reason for the attribute. */ | |
3010 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) | |
3011 | { | |
3012 | gfc_error ("Variable '%s' in common block '%s' at " | |
3013 | "%L cannot be declared with BIND(C) " | |
3014 | "since it is not a global", | |
3015 | tmp_sym->name, com_block->name, | |
3016 | &(tmp_sym->declared_at)); | |
3017 | retval = FAILURE; | |
3018 | } | |
3019 | ||
3020 | /* Scalar variables that are bind(c) can not have the pointer | |
3021 | or allocatable attributes. */ | |
3022 | if (tmp_sym->attr.is_bind_c == 1) | |
3023 | { | |
3024 | if (tmp_sym->attr.pointer == 1) | |
3025 | { | |
3026 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3027 | "POINTER and BIND(C) attributes", | |
3028 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3029 | retval = FAILURE; | |
3030 | } | |
3031 | ||
3032 | if (tmp_sym->attr.allocatable == 1) | |
3033 | { | |
3034 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3035 | "ALLOCATABLE and BIND(C) attributes", | |
3036 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3037 | retval = FAILURE; | |
3038 | } | |
3039 | ||
3040 | /* If it is a BIND(C) function, make sure the return value is a | |
3041 | scalar value. The previous tests in this function made sure | |
3042 | the type is interoperable. */ | |
3043 | if (tmp_sym->attr.function == 1 && tmp_sym->as != NULL) | |
3044 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3045 | "be an array", tmp_sym->name, &(tmp_sym->declared_at)); | |
3046 | ||
3047 | /* BIND(C) functions can not return a character string. */ | |
3048 | if (tmp_sym->attr.function == 1 && tmp_sym->ts.type == BT_CHARACTER) | |
3049 | if (tmp_sym->ts.cl == NULL || tmp_sym->ts.cl->length == NULL | |
3050 | || tmp_sym->ts.cl->length->expr_type != EXPR_CONSTANT | |
3051 | || mpz_cmp_si (tmp_sym->ts.cl->length->value.integer, 1) != 0) | |
3052 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3053 | "be a character string", tmp_sym->name, | |
3054 | &(tmp_sym->declared_at)); | |
3055 | } | |
3056 | } | |
3057 | ||
3058 | /* See if the symbol has been marked as private. If it has, make sure | |
3059 | there is no binding label and warn the user if there is one. */ | |
3060 | if (tmp_sym->attr.access == ACCESS_PRIVATE | |
3061 | && tmp_sym->binding_label[0] != '\0') | |
3062 | /* Use gfc_warning_now because we won't say that the symbol fails | |
3063 | just because of this. */ | |
3064 | gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " | |
3065 | "given the binding label '%s'", tmp_sym->name, | |
3066 | &(tmp_sym->declared_at), tmp_sym->binding_label); | |
3067 | ||
3068 | return retval; | |
3069 | } | |
3070 | ||
3071 | ||
3072 | /* Set the appropriate fields for a symbol that's been declared as | |
3073 | BIND(C) (the is_bind_c flag and the binding label), and verify that | |
3074 | the type is C interoperable. Errors are reported by the functions | |
3075 | used to set/test these fields. */ | |
3076 | ||
3077 | try | |
3078 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) | |
3079 | { | |
3080 | try retval = SUCCESS; | |
3081 | ||
3082 | /* TODO: Do we need to make sure the vars aren't marked private? */ | |
3083 | ||
3084 | /* Set the is_bind_c bit in symbol_attribute. */ | |
3085 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); | |
3086 | ||
3087 | if (set_binding_label (tmp_sym->binding_label, tmp_sym->name, | |
3088 | num_idents) != SUCCESS) | |
3089 | return FAILURE; | |
3090 | ||
3091 | return retval; | |
3092 | } | |
3093 | ||
3094 | ||
3095 | /* Set the fields marking the given common block as BIND(C), including | |
3096 | a binding label, and report any errors encountered. */ | |
3097 | ||
3098 | try | |
3099 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) | |
3100 | { | |
3101 | try retval = SUCCESS; | |
3102 | ||
3103 | /* destLabel, common name, typespec (which may have binding label). */ | |
3104 | if (set_binding_label (com_block->binding_label, com_block->name, num_idents) | |
3105 | != SUCCESS) | |
3106 | return FAILURE; | |
3107 | ||
3108 | /* Set the given common block (com_block) to being bind(c) (1). */ | |
3109 | set_com_block_bind_c (com_block, 1); | |
3110 | ||
3111 | return retval; | |
3112 | } | |
3113 | ||
3114 | ||
3115 | /* Retrieve the list of one or more identifiers that the given bind(c) | |
3116 | attribute applies to. */ | |
3117 | ||
3118 | try | |
3119 | get_bind_c_idents (void) | |
3120 | { | |
3121 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3122 | int num_idents = 0; | |
3123 | gfc_symbol *tmp_sym = NULL; | |
3124 | match found_id; | |
3125 | gfc_common_head *com_block = NULL; | |
3126 | ||
3127 | if (gfc_match_name (name) == MATCH_YES) | |
3128 | { | |
3129 | found_id = MATCH_YES; | |
3130 | gfc_get_ha_symbol (name, &tmp_sym); | |
3131 | } | |
3132 | else if (match_common_name (name) == MATCH_YES) | |
3133 | { | |
3134 | found_id = MATCH_YES; | |
3135 | com_block = gfc_get_common (name, 0); | |
3136 | } | |
3137 | else | |
3138 | { | |
3139 | gfc_error ("Need either entity or common block name for " | |
3140 | "attribute specification statement at %C"); | |
3141 | return FAILURE; | |
3142 | } | |
3143 | ||
3144 | /* Save the current identifier and look for more. */ | |
3145 | do | |
3146 | { | |
3147 | /* Increment the number of identifiers found for this spec stmt. */ | |
3148 | num_idents++; | |
3149 | ||
3150 | /* Make sure we have a sym or com block, and verify that it can | |
3151 | be bind(c). Set the appropriate field(s) and look for more | |
3152 | identifiers. */ | |
3153 | if (tmp_sym != NULL || com_block != NULL) | |
3154 | { | |
3155 | if (tmp_sym != NULL) | |
3156 | { | |
3157 | if (set_verify_bind_c_sym (tmp_sym, num_idents) | |
3158 | != SUCCESS) | |
3159 | return FAILURE; | |
3160 | } | |
3161 | else | |
3162 | { | |
3163 | if (set_verify_bind_c_com_block(com_block, num_idents) | |
3164 | != SUCCESS) | |
3165 | return FAILURE; | |
3166 | } | |
3167 | ||
3168 | /* Look to see if we have another identifier. */ | |
3169 | tmp_sym = NULL; | |
3170 | if (gfc_match_eos () == MATCH_YES) | |
3171 | found_id = MATCH_NO; | |
3172 | else if (gfc_match_char (',') != MATCH_YES) | |
3173 | found_id = MATCH_NO; | |
3174 | else if (gfc_match_name (name) == MATCH_YES) | |
3175 | { | |
3176 | found_id = MATCH_YES; | |
3177 | gfc_get_ha_symbol (name, &tmp_sym); | |
3178 | } | |
3179 | else if (match_common_name (name) == MATCH_YES) | |
3180 | { | |
3181 | found_id = MATCH_YES; | |
3182 | com_block = gfc_get_common (name, 0); | |
3183 | } | |
3184 | else | |
3185 | { | |
3186 | gfc_error ("Missing entity or common block name for " | |
3187 | "attribute specification statement at %C"); | |
3188 | return FAILURE; | |
3189 | } | |
3190 | } | |
3191 | else | |
3192 | { | |
3193 | gfc_internal_error ("Missing symbol"); | |
3194 | } | |
3195 | } while (found_id == MATCH_YES); | |
3196 | ||
3197 | /* if we get here we were successful */ | |
3198 | return SUCCESS; | |
3199 | } | |
3200 | ||
3201 | ||
3202 | /* Try and match a BIND(C) attribute specification statement. */ | |
3203 | ||
3204 | match | |
3205 | gfc_match_bind_c_stmt (void) | |
3206 | { | |
3207 | match found_match = MATCH_NO; | |
3208 | gfc_typespec *ts; | |
3209 | ||
3210 | ts = ¤t_ts; | |
3211 | ||
3212 | /* This may not be necessary. */ | |
3213 | gfc_clear_ts (ts); | |
3214 | /* Clear the temporary binding label holder. */ | |
3215 | curr_binding_label[0] = '\0'; | |
3216 | ||
3217 | /* Look for the bind(c). */ | |
3218 | found_match = gfc_match_bind_c (NULL); | |
3219 | ||
3220 | if (found_match == MATCH_YES) | |
3221 | { | |
3222 | /* Look for the :: now, but it is not required. */ | |
3223 | gfc_match (" :: "); | |
3224 | ||
3225 | /* Get the identifier(s) that needs to be updated. This may need to | |
3226 | change to hand the flag(s) for the attr specified so all identifiers | |
3227 | found can have all appropriate parts updated (assuming that the same | |
3228 | spec stmt can have multiple attrs, such as both bind(c) and | |
3229 | allocatable...). */ | |
3230 | if (get_bind_c_idents () != SUCCESS) | |
3231 | /* Error message should have printed already. */ | |
3232 | return MATCH_ERROR; | |
3233 | } | |
3234 | ||
3235 | return found_match; | |
3236 | } | |
3237 | ||
3238 | ||
6de9cd9a DN |
3239 | /* Match a data declaration statement. */ |
3240 | ||
3241 | match | |
3242 | gfc_match_data_decl (void) | |
3243 | { | |
3244 | gfc_symbol *sym; | |
3245 | match m; | |
949d5b72 | 3246 | int elem; |
6de9cd9a | 3247 | |
a8b3b0b6 CR |
3248 | num_idents_on_line = 0; |
3249 | ||
e5ddaa24 | 3250 | m = match_type_spec (¤t_ts, 0); |
6de9cd9a DN |
3251 | if (m != MATCH_YES) |
3252 | return m; | |
3253 | ||
3254 | if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) | |
3255 | { | |
3256 | sym = gfc_use_derived (current_ts.derived); | |
3257 | ||
3258 | if (sym == NULL) | |
3259 | { | |
3260 | m = MATCH_ERROR; | |
3261 | goto cleanup; | |
3262 | } | |
3263 | ||
3264 | current_ts.derived = sym; | |
3265 | } | |
3266 | ||
3267 | m = match_attr_spec (); | |
3268 | if (m == MATCH_ERROR) | |
3269 | { | |
3270 | m = MATCH_NO; | |
3271 | goto cleanup; | |
3272 | } | |
3273 | ||
3274 | if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL) | |
3275 | { | |
3276 | ||
3277 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
3278 | goto ok; | |
3279 | ||
976e21f6 | 3280 | gfc_find_symbol (current_ts.derived->name, |
636dff67 | 3281 | current_ts.derived->ns->parent, 1, &sym); |
6de9cd9a | 3282 | |
976e21f6 | 3283 | /* Any symbol that we find had better be a type definition |
636dff67 | 3284 | which has its components defined. */ |
976e21f6 | 3285 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
636dff67 | 3286 | && current_ts.derived->components != NULL) |
6de9cd9a DN |
3287 | goto ok; |
3288 | ||
976e21f6 PT |
3289 | /* Now we have an error, which we signal, and then fix up |
3290 | because the knock-on is plain and simple confusing. */ | |
3291 | gfc_error_now ("Derived type at %C has not been previously defined " | |
636dff67 | 3292 | "and so cannot appear in a derived type definition"); |
976e21f6 PT |
3293 | current_attr.pointer = 1; |
3294 | goto ok; | |
6de9cd9a DN |
3295 | } |
3296 | ||
3297 | ok: | |
3298 | /* If we have an old-style character declaration, and no new-style | |
3299 | attribute specifications, then there a comma is optional between | |
3300 | the type specification and the variable list. */ | |
3301 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
3302 | gfc_match_char (','); | |
3303 | ||
949d5b72 PT |
3304 | /* Give the types/attributes to symbols that follow. Give the element |
3305 | a number so that repeat character length expressions can be copied. */ | |
3306 | elem = 1; | |
6de9cd9a DN |
3307 | for (;;) |
3308 | { | |
a8b3b0b6 | 3309 | num_idents_on_line++; |
949d5b72 | 3310 | m = variable_decl (elem++); |
6de9cd9a DN |
3311 | if (m == MATCH_ERROR) |
3312 | goto cleanup; | |
3313 | if (m == MATCH_NO) | |
3314 | break; | |
3315 | ||
3316 | if (gfc_match_eos () == MATCH_YES) | |
3317 | goto cleanup; | |
3318 | if (gfc_match_char (',') != MATCH_YES) | |
3319 | break; | |
3320 | } | |
3321 | ||
8f81c3c6 PT |
3322 | if (gfc_error_flag_test () == 0) |
3323 | gfc_error ("Syntax error in data declaration at %C"); | |
6de9cd9a DN |
3324 | m = MATCH_ERROR; |
3325 | ||
a9f6f1f2 JD |
3326 | gfc_free_data_all (gfc_current_ns); |
3327 | ||
6de9cd9a DN |
3328 | cleanup: |
3329 | gfc_free_array_spec (current_as); | |
3330 | current_as = NULL; | |
3331 | return m; | |
3332 | } | |
3333 | ||
3334 | ||
3335 | /* Match a prefix associated with a function or subroutine | |
3336 | declaration. If the typespec pointer is nonnull, then a typespec | |
3337 | can be matched. Note that if nothing matches, MATCH_YES is | |
3338 | returned (the null string was matched). */ | |
3339 | ||
3340 | static match | |
636dff67 | 3341 | match_prefix (gfc_typespec *ts) |
6de9cd9a DN |
3342 | { |
3343 | int seen_type; | |
3344 | ||
3345 | gfc_clear_attr (¤t_attr); | |
3346 | seen_type = 0; | |
3347 | ||
3348 | loop: | |
3349 | if (!seen_type && ts != NULL | |
e5ddaa24 | 3350 | && match_type_spec (ts, 0) == MATCH_YES |
6de9cd9a DN |
3351 | && gfc_match_space () == MATCH_YES) |
3352 | { | |
3353 | ||
3354 | seen_type = 1; | |
3355 | goto loop; | |
3356 | } | |
3357 | ||
3358 | if (gfc_match ("elemental% ") == MATCH_YES) | |
3359 | { | |
3360 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
3361 | return MATCH_ERROR; | |
3362 | ||
3363 | goto loop; | |
3364 | } | |
3365 | ||
3366 | if (gfc_match ("pure% ") == MATCH_YES) | |
3367 | { | |
3368 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
3369 | return MATCH_ERROR; | |
3370 | ||
3371 | goto loop; | |
3372 | } | |
3373 | ||
3374 | if (gfc_match ("recursive% ") == MATCH_YES) | |
3375 | { | |
3376 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
3377 | return MATCH_ERROR; | |
3378 | ||
3379 | goto loop; | |
3380 | } | |
3381 | ||
3382 | /* At this point, the next item is not a prefix. */ | |
3383 | return MATCH_YES; | |
3384 | } | |
3385 | ||
3386 | ||
3387 | /* Copy attributes matched by match_prefix() to attributes on a symbol. */ | |
3388 | ||
3389 | static try | |
636dff67 | 3390 | copy_prefix (symbol_attribute *dest, locus *where) |
6de9cd9a | 3391 | { |
6de9cd9a DN |
3392 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
3393 | return FAILURE; | |
3394 | ||
3395 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
3396 | return FAILURE; | |
3397 | ||
3398 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
3399 | return FAILURE; | |
3400 | ||
3401 | return SUCCESS; | |
3402 | } | |
3403 | ||
3404 | ||
3405 | /* Match a formal argument list. */ | |
3406 | ||
3407 | match | |
636dff67 | 3408 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
6de9cd9a DN |
3409 | { |
3410 | gfc_formal_arglist *head, *tail, *p, *q; | |
3411 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3412 | gfc_symbol *sym; | |
3413 | match m; | |
3414 | ||
3415 | head = tail = NULL; | |
3416 | ||
3417 | if (gfc_match_char ('(') != MATCH_YES) | |
3418 | { | |
3419 | if (null_flag) | |
3420 | goto ok; | |
3421 | return MATCH_NO; | |
3422 | } | |
3423 | ||
3424 | if (gfc_match_char (')') == MATCH_YES) | |
3425 | goto ok; | |
3426 | ||
3427 | for (;;) | |
3428 | { | |
3429 | if (gfc_match_char ('*') == MATCH_YES) | |
3430 | sym = NULL; | |
3431 | else | |
3432 | { | |
3433 | m = gfc_match_name (name); | |
3434 | if (m != MATCH_YES) | |
3435 | goto cleanup; | |
3436 | ||
3437 | if (gfc_get_symbol (name, NULL, &sym)) | |
3438 | goto cleanup; | |
3439 | } | |
3440 | ||
3441 | p = gfc_get_formal_arglist (); | |
3442 | ||
3443 | if (head == NULL) | |
3444 | head = tail = p; | |
3445 | else | |
3446 | { | |
3447 | tail->next = p; | |
3448 | tail = p; | |
3449 | } | |
3450 | ||
3451 | tail->sym = sym; | |
3452 | ||
3453 | /* We don't add the VARIABLE flavor because the name could be a | |
636dff67 SK |
3454 | dummy procedure. We don't apply these attributes to formal |
3455 | arguments of statement functions. */ | |
6de9cd9a | 3456 | if (sym != NULL && !st_flag |
231b2fcc | 3457 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
6de9cd9a DN |
3458 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
3459 | { | |
3460 | m = MATCH_ERROR; | |
3461 | goto cleanup; | |
3462 | } | |
3463 | ||
3464 | /* The name of a program unit can be in a different namespace, | |
636dff67 SK |
3465 | so check for it explicitly. After the statement is accepted, |
3466 | the name is checked for especially in gfc_get_symbol(). */ | |
6de9cd9a DN |
3467 | if (gfc_new_block != NULL && sym != NULL |
3468 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
3469 | { | |
3470 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
3471 | sym->name); | |
3472 | m = MATCH_ERROR; | |
3473 | goto cleanup; | |
3474 | } | |
3475 | ||
3476 | if (gfc_match_char (')') == MATCH_YES) | |
3477 | goto ok; | |
3478 | ||
3479 | m = gfc_match_char (','); | |
3480 | if (m != MATCH_YES) | |
3481 | { | |
3482 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
3483 | goto cleanup; | |
3484 | } | |
3485 | } | |
3486 | ||
3487 | ok: | |
3488 | /* Check for duplicate symbols in the formal argument list. */ | |
3489 | if (head != NULL) | |
3490 | { | |
3491 | for (p = head; p->next; p = p->next) | |
3492 | { | |
3493 | if (p->sym == NULL) | |
3494 | continue; | |
3495 | ||
3496 | for (q = p->next; q; q = q->next) | |
3497 | if (p->sym == q->sym) | |
3498 | { | |
636dff67 SK |
3499 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
3500 | "at %C", p->sym->name); | |
6de9cd9a DN |
3501 | |
3502 | m = MATCH_ERROR; | |
3503 | goto cleanup; | |
3504 | } | |
3505 | } | |
3506 | } | |
3507 | ||
66e4ab31 SK |
3508 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) |
3509 | == FAILURE) | |
6de9cd9a DN |
3510 | { |
3511 | m = MATCH_ERROR; | |
3512 | goto cleanup; | |
3513 | } | |
3514 | ||
3515 | return MATCH_YES; | |
3516 | ||
3517 | cleanup: | |
3518 | gfc_free_formal_arglist (head); | |
3519 | return m; | |
3520 | } | |
3521 | ||
3522 | ||
3523 | /* Match a RESULT specification following a function declaration or | |
3524 | ENTRY statement. Also matches the end-of-statement. */ | |
3525 | ||
3526 | static match | |
66e4ab31 | 3527 | match_result (gfc_symbol *function, gfc_symbol **result) |
6de9cd9a DN |
3528 | { |
3529 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3530 | gfc_symbol *r; | |
3531 | match m; | |
3532 | ||
3533 | if (gfc_match (" result (") != MATCH_YES) | |
3534 | return MATCH_NO; | |
3535 | ||
3536 | m = gfc_match_name (name); | |
3537 | if (m != MATCH_YES) | |
3538 | return m; | |
3539 | ||
a8b3b0b6 CR |
3540 | /* Get the right paren, and that's it because there could be the |
3541 | bind(c) attribute after the result clause. */ | |
3542 | if (gfc_match_char(')') != MATCH_YES) | |
6de9cd9a | 3543 | { |
a8b3b0b6 | 3544 | /* TODO: should report the missing right paren here. */ |
6de9cd9a DN |
3545 | return MATCH_ERROR; |
3546 | } | |
3547 | ||
3548 | if (strcmp (function->name, name) == 0) | |
3549 | { | |
636dff67 | 3550 | gfc_error ("RESULT variable at %C must be different than function name"); |
6de9cd9a DN |
3551 | return MATCH_ERROR; |
3552 | } | |
3553 | ||
3554 | if (gfc_get_symbol (name, NULL, &r)) | |
3555 | return MATCH_ERROR; | |
3556 | ||
231b2fcc TS |
3557 | if (gfc_add_flavor (&r->attr, FL_VARIABLE, r->name, NULL) == FAILURE |
3558 | || gfc_add_result (&r->attr, r->name, NULL) == FAILURE) | |
6de9cd9a DN |
3559 | return MATCH_ERROR; |
3560 | ||
3561 | *result = r; | |
3562 | ||
3563 | return MATCH_YES; | |
3564 | } | |
3565 | ||
3566 | ||
a8b3b0b6 CR |
3567 | /* Match a function suffix, which could be a combination of a result |
3568 | clause and BIND(C), either one, or neither. The draft does not | |
3569 | require them to come in a specific order. */ | |
3570 | ||
3571 | match | |
3572 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) | |
3573 | { | |
3574 | match is_bind_c; /* Found bind(c). */ | |
3575 | match is_result; /* Found result clause. */ | |
3576 | match found_match; /* Status of whether we've found a good match. */ | |
3577 | int peek_char; /* Character we're going to peek at. */ | |
3578 | ||
3579 | /* Initialize to having found nothing. */ | |
3580 | found_match = MATCH_NO; | |
3581 | is_bind_c = MATCH_NO; | |
3582 | is_result = MATCH_NO; | |
3583 | ||
3584 | /* Get the next char to narrow between result and bind(c). */ | |
3585 | gfc_gobble_whitespace (); | |
3586 | peek_char = gfc_peek_char (); | |
3587 | ||
3588 | switch (peek_char) | |
3589 | { | |
3590 | case 'r': | |
3591 | /* Look for result clause. */ | |
3592 | is_result = match_result (sym, result); | |
3593 | if (is_result == MATCH_YES) | |
3594 | { | |
3595 | /* Now see if there is a bind(c) after it. */ | |
3596 | is_bind_c = gfc_match_bind_c (sym); | |
3597 | /* We've found the result clause and possibly bind(c). */ | |
3598 | found_match = MATCH_YES; | |
3599 | } | |
3600 | else | |
3601 | /* This should only be MATCH_ERROR. */ | |
3602 | found_match = is_result; | |
3603 | break; | |
3604 | case 'b': | |
3605 | /* Look for bind(c) first. */ | |
3606 | is_bind_c = gfc_match_bind_c (sym); | |
3607 | if (is_bind_c == MATCH_YES) | |
3608 | { | |
3609 | /* Now see if a result clause followed it. */ | |
3610 | is_result = match_result (sym, result); | |
3611 | found_match = MATCH_YES; | |
3612 | } | |
3613 | else | |
3614 | { | |
3615 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ | |
3616 | found_match = MATCH_ERROR; | |
3617 | } | |
3618 | break; | |
3619 | default: | |
3620 | gfc_error ("Unexpected junk after function declaration at %C"); | |
3621 | found_match = MATCH_ERROR; | |
3622 | break; | |
3623 | } | |
3624 | ||
a8b3b0b6 CR |
3625 | if (is_bind_c == MATCH_YES) |
3626 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) | |
3627 | == FAILURE) | |
3628 | return MATCH_ERROR; | |
3629 | ||
3630 | return found_match; | |
3631 | } | |
3632 | ||
3633 | ||
6de9cd9a DN |
3634 | /* Match a function declaration. */ |
3635 | ||
3636 | match | |
3637 | gfc_match_function_decl (void) | |
3638 | { | |
3639 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3640 | gfc_symbol *sym, *result; | |
3641 | locus old_loc; | |
3642 | match m; | |
a8b3b0b6 CR |
3643 | match suffix_match; |
3644 | match found_match; /* Status returned by match func. */ | |
6de9cd9a DN |
3645 | |
3646 | if (gfc_current_state () != COMP_NONE | |
3647 | && gfc_current_state () != COMP_INTERFACE | |
3648 | && gfc_current_state () != COMP_CONTAINS) | |
3649 | return MATCH_NO; | |
3650 | ||
3651 | gfc_clear_ts (¤t_ts); | |
3652 | ||
63645982 | 3653 | old_loc = gfc_current_locus; |
6de9cd9a DN |
3654 | |
3655 | m = match_prefix (¤t_ts); | |
3656 | if (m != MATCH_YES) | |
3657 | { | |
63645982 | 3658 | gfc_current_locus = old_loc; |
6de9cd9a DN |
3659 | return m; |
3660 | } | |
3661 | ||
3662 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
3663 | { | |
63645982 | 3664 | gfc_current_locus = old_loc; |
6de9cd9a DN |
3665 | return MATCH_NO; |
3666 | } | |
1a492601 | 3667 | if (get_proc_name (name, &sym, false)) |
6de9cd9a DN |
3668 | return MATCH_ERROR; |
3669 | gfc_new_block = sym; | |
3670 | ||
3671 | m = gfc_match_formal_arglist (sym, 0, 0); | |
3672 | if (m == MATCH_NO) | |
2b9a33ae TS |
3673 | { |
3674 | gfc_error ("Expected formal argument list in function " | |
636dff67 | 3675 | "definition at %C"); |
2b9a33ae TS |
3676 | m = MATCH_ERROR; |
3677 | goto cleanup; | |
3678 | } | |
6de9cd9a DN |
3679 | else if (m == MATCH_ERROR) |
3680 | goto cleanup; | |
3681 | ||
3682 | result = NULL; | |
3683 | ||
a8b3b0b6 CR |
3684 | /* According to the draft, the bind(c) and result clause can |
3685 | come in either order after the formal_arg_list (i.e., either | |
3686 | can be first, both can exist together or by themselves or neither | |
3687 | one). Therefore, the match_result can't match the end of the | |
3688 | string, and check for the bind(c) or result clause in either order. */ | |
3689 | found_match = gfc_match_eos (); | |
3690 | ||
3691 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
3692 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
3693 | not allowed for procedures. */ | |
3694 | if (sym->attr.is_bind_c == 1) | |
3695 | { | |
3696 | sym->attr.is_bind_c = 0; | |
3697 | if (sym->old_symbol != NULL) | |
3698 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
3699 | "variables or common blocks", | |
3700 | &(sym->old_symbol->declared_at)); | |
3701 | else | |
3702 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
3703 | "variables or common blocks", &gfc_current_locus); | |
6de9cd9a DN |
3704 | } |
3705 | ||
a8b3b0b6 | 3706 | if (found_match != MATCH_YES) |
6de9cd9a | 3707 | { |
a8b3b0b6 CR |
3708 | /* If we haven't found the end-of-statement, look for a suffix. */ |
3709 | suffix_match = gfc_match_suffix (sym, &result); | |
3710 | if (suffix_match == MATCH_YES) | |
3711 | /* Need to get the eos now. */ | |
3712 | found_match = gfc_match_eos (); | |
3713 | else | |
3714 | found_match = suffix_match; | |
6de9cd9a DN |
3715 | } |
3716 | ||
a8b3b0b6 CR |
3717 | if(found_match != MATCH_YES) |
3718 | m = MATCH_ERROR; | |
6de9cd9a DN |
3719 | else |
3720 | { | |
a8b3b0b6 CR |
3721 | /* Make changes to the symbol. */ |
3722 | m = MATCH_ERROR; | |
3723 | ||
3724 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) | |
3725 | goto cleanup; | |
3726 | ||
3727 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
3728 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
3729 | goto cleanup; | |
6de9cd9a | 3730 | |
a8b3b0b6 CR |
3731 | if (current_ts.type != BT_UNKNOWN && sym->ts.type != BT_UNKNOWN |
3732 | && !sym->attr.implicit_type) | |
3733 | { | |
3734 | gfc_error ("Function '%s' at %C already has a type of %s", name, | |
3735 | gfc_basic_typename (sym->ts.type)); | |
3736 | goto cleanup; | |
3737 | } | |
3738 | ||
3739 | if (result == NULL) | |
3740 | { | |
3741 | sym->ts = current_ts; | |
3742 | sym->result = sym; | |
3743 | } | |
3744 | else | |
3745 | { | |
3746 | result->ts = current_ts; | |
3747 | sym->result = result; | |
3748 | } | |
3749 | ||
3750 | return MATCH_YES; | |
3751 | } | |
6de9cd9a DN |
3752 | |
3753 | cleanup: | |
63645982 | 3754 | gfc_current_locus = old_loc; |
6de9cd9a DN |
3755 | return m; |
3756 | } | |
3757 | ||
636dff67 SK |
3758 | |
3759 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
3760 | pass the name of the entry, rather than the gfc_current_block name, and | |
3761 | to return false upon finding an existing global entry. */ | |
68ea355b PT |
3762 | |
3763 | static bool | |
636dff67 | 3764 | add_global_entry (const char *name, int sub) |
68ea355b PT |
3765 | { |
3766 | gfc_gsymbol *s; | |
3767 | ||
3768 | s = gfc_get_gsymbol(name); | |
3769 | ||
3770 | if (s->defined | |
636dff67 SK |
3771 | || (s->type != GSYM_UNKNOWN |
3772 | && s->type != (sub ? GSYM_SUBROUTINE : GSYM_FUNCTION))) | |
68ea355b PT |
3773 | global_used(s, NULL); |
3774 | else | |
3775 | { | |
3776 | s->type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; | |
3777 | s->where = gfc_current_locus; | |
3778 | s->defined = 1; | |
3779 | return true; | |
3780 | } | |
3781 | return false; | |
3782 | } | |
6de9cd9a | 3783 | |
636dff67 | 3784 | |
6de9cd9a DN |
3785 | /* Match an ENTRY statement. */ |
3786 | ||
3787 | match | |
3788 | gfc_match_entry (void) | |
3789 | { | |
3d79abbd PB |
3790 | gfc_symbol *proc; |
3791 | gfc_symbol *result; | |
3792 | gfc_symbol *entry; | |
6de9cd9a DN |
3793 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
3794 | gfc_compile_state state; | |
3795 | match m; | |
3d79abbd | 3796 | gfc_entry_list *el; |
c96cfa49 | 3797 | locus old_loc; |
1a492601 | 3798 | bool module_procedure; |
6de9cd9a DN |
3799 | |
3800 | m = gfc_match_name (name); | |
3801 | if (m != MATCH_YES) | |
3802 | return m; | |
3803 | ||
3d79abbd | 3804 | state = gfc_current_state (); |
4c93c95a | 3805 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
3d79abbd | 3806 | { |
4c93c95a FXC |
3807 | switch (state) |
3808 | { | |
3809 | case COMP_PROGRAM: | |
3810 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
3811 | break; | |
3812 | case COMP_MODULE: | |
3813 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
3814 | break; | |
3815 | case COMP_BLOCK_DATA: | |
636dff67 SK |
3816 | gfc_error ("ENTRY statement at %C cannot appear within " |
3817 | "a BLOCK DATA"); | |
4c93c95a FXC |
3818 | break; |
3819 | case COMP_INTERFACE: | |
636dff67 SK |
3820 | gfc_error ("ENTRY statement at %C cannot appear within " |
3821 | "an INTERFACE"); | |
4c93c95a FXC |
3822 | break; |
3823 | case COMP_DERIVED: | |
636dff67 SK |
3824 | gfc_error ("ENTRY statement at %C cannot appear within " |
3825 | "a DERIVED TYPE block"); | |
4c93c95a FXC |
3826 | break; |
3827 | case COMP_IF: | |
636dff67 SK |
3828 | gfc_error ("ENTRY statement at %C cannot appear within " |
3829 | "an IF-THEN block"); | |
4c93c95a FXC |
3830 | break; |
3831 | case COMP_DO: | |
636dff67 SK |
3832 | gfc_error ("ENTRY statement at %C cannot appear within " |
3833 | "a DO block"); | |
4c93c95a FXC |
3834 | break; |
3835 | case COMP_SELECT: | |
636dff67 SK |
3836 | gfc_error ("ENTRY statement at %C cannot appear within " |
3837 | "a SELECT block"); | |
4c93c95a FXC |
3838 | break; |
3839 | case COMP_FORALL: | |
636dff67 SK |
3840 | gfc_error ("ENTRY statement at %C cannot appear within " |
3841 | "a FORALL block"); | |
4c93c95a FXC |
3842 | break; |
3843 | case COMP_WHERE: | |
636dff67 SK |
3844 | gfc_error ("ENTRY statement at %C cannot appear within " |
3845 | "a WHERE block"); | |
4c93c95a FXC |
3846 | break; |
3847 | case COMP_CONTAINS: | |
636dff67 SK |
3848 | gfc_error ("ENTRY statement at %C cannot appear within " |
3849 | "a contained subprogram"); | |
4c93c95a FXC |
3850 | break; |
3851 | default: | |
3852 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
3853 | } | |
3d79abbd PB |
3854 | return MATCH_ERROR; |
3855 | } | |
3856 | ||
1a492601 | 3857 | module_procedure = gfc_current_ns->parent != NULL |
636dff67 SK |
3858 | && gfc_current_ns->parent->proc_name |
3859 | && gfc_current_ns->parent->proc_name->attr.flavor | |
3860 | == FL_MODULE; | |
1a492601 | 3861 | |
3d79abbd PB |
3862 | if (gfc_current_ns->parent != NULL |
3863 | && gfc_current_ns->parent->proc_name | |
1a492601 | 3864 | && !module_procedure) |
3d79abbd PB |
3865 | { |
3866 | gfc_error("ENTRY statement at %C cannot appear in a " | |
3867 | "contained procedure"); | |
3868 | return MATCH_ERROR; | |
3869 | } | |
3870 | ||
1a492601 PT |
3871 | /* Module function entries need special care in get_proc_name |
3872 | because previous references within the function will have | |
3873 | created symbols attached to the current namespace. */ | |
3874 | if (get_proc_name (name, &entry, | |
3875 | gfc_current_ns->parent != NULL | |
3876 | && module_procedure | |
3877 | && gfc_current_ns->proc_name->attr.function)) | |
6de9cd9a DN |
3878 | return MATCH_ERROR; |
3879 | ||
3d79abbd PB |
3880 | proc = gfc_current_block (); |
3881 | ||
3882 | if (state == COMP_SUBROUTINE) | |
6de9cd9a | 3883 | { |
231b2fcc | 3884 | /* An entry in a subroutine. */ |
68ea355b PT |
3885 | if (!add_global_entry (name, 1)) |
3886 | return MATCH_ERROR; | |
3887 | ||
6de9cd9a DN |
3888 | m = gfc_match_formal_arglist (entry, 0, 1); |
3889 | if (m != MATCH_YES) | |
3890 | return MATCH_ERROR; | |
3891 | ||
231b2fcc TS |
3892 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
3893 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a | 3894 | return MATCH_ERROR; |
3d79abbd PB |
3895 | } |
3896 | else | |
3897 | { | |
c96cfa49 | 3898 | /* An entry in a function. |
636dff67 SK |
3899 | We need to take special care because writing |
3900 | ENTRY f() | |
3901 | as | |
3902 | ENTRY f | |
3903 | is allowed, whereas | |
3904 | ENTRY f() RESULT (r) | |
3905 | can't be written as | |
3906 | ENTRY f RESULT (r). */ | |
68ea355b PT |
3907 | if (!add_global_entry (name, 0)) |
3908 | return MATCH_ERROR; | |
3909 | ||
c96cfa49 TS |
3910 | old_loc = gfc_current_locus; |
3911 | if (gfc_match_eos () == MATCH_YES) | |
3912 | { | |
3913 | gfc_current_locus = old_loc; | |
3914 | /* Match the empty argument list, and add the interface to | |
3915 | the symbol. */ | |
3916 | m = gfc_match_formal_arglist (entry, 0, 1); | |
3917 | } | |
3918 | else | |
3919 | m = gfc_match_formal_arglist (entry, 0, 0); | |
3920 | ||
6de9cd9a DN |
3921 | if (m != MATCH_YES) |
3922 | return MATCH_ERROR; | |
3923 | ||
6de9cd9a DN |
3924 | result = NULL; |
3925 | ||
3926 | if (gfc_match_eos () == MATCH_YES) | |
3927 | { | |
231b2fcc TS |
3928 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
3929 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a DN |
3930 | return MATCH_ERROR; |
3931 | ||
d198b59a | 3932 | entry->result = entry; |
6de9cd9a DN |
3933 | } |
3934 | else | |
3935 | { | |
3d79abbd | 3936 | m = match_result (proc, &result); |
6de9cd9a DN |
3937 | if (m == MATCH_NO) |
3938 | gfc_syntax_error (ST_ENTRY); | |
3939 | if (m != MATCH_YES) | |
3940 | return MATCH_ERROR; | |
3941 | ||
231b2fcc TS |
3942 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE |
3943 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
636dff67 SK |
3944 | || gfc_add_function (&entry->attr, result->name, NULL) |
3945 | == FAILURE) | |
6de9cd9a | 3946 | return MATCH_ERROR; |
d198b59a JJ |
3947 | |
3948 | entry->result = result; | |
6de9cd9a | 3949 | } |
6de9cd9a DN |
3950 | } |
3951 | ||
3952 | if (gfc_match_eos () != MATCH_YES) | |
3953 | { | |
3954 | gfc_syntax_error (ST_ENTRY); | |
3955 | return MATCH_ERROR; | |
3956 | } | |
3957 | ||
3d79abbd PB |
3958 | entry->attr.recursive = proc->attr.recursive; |
3959 | entry->attr.elemental = proc->attr.elemental; | |
3960 | entry->attr.pure = proc->attr.pure; | |
6de9cd9a | 3961 | |
3d79abbd PB |
3962 | el = gfc_get_entry_list (); |
3963 | el->sym = entry; | |
3964 | el->next = gfc_current_ns->entries; | |
3965 | gfc_current_ns->entries = el; | |
3966 | if (el->next) | |
3967 | el->id = el->next->id + 1; | |
3968 | else | |
3969 | el->id = 1; | |
6de9cd9a | 3970 | |
3d79abbd PB |
3971 | new_st.op = EXEC_ENTRY; |
3972 | new_st.ext.entry = el; | |
3973 | ||
3974 | return MATCH_YES; | |
6de9cd9a DN |
3975 | } |
3976 | ||
3977 | ||
3978 | /* Match a subroutine statement, including optional prefixes. */ | |
3979 | ||
3980 | match | |
3981 | gfc_match_subroutine (void) | |
3982 | { | |
3983 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3984 | gfc_symbol *sym; | |
3985 | match m; | |
a8b3b0b6 CR |
3986 | match is_bind_c; |
3987 | char peek_char; | |
6de9cd9a DN |
3988 | |
3989 | if (gfc_current_state () != COMP_NONE | |
3990 | && gfc_current_state () != COMP_INTERFACE | |
3991 | && gfc_current_state () != COMP_CONTAINS) | |
3992 | return MATCH_NO; | |
3993 | ||
3994 | m = match_prefix (NULL); | |
3995 | if (m != MATCH_YES) | |
3996 | return m; | |
3997 | ||
3998 | m = gfc_match ("subroutine% %n", name); | |
3999 | if (m != MATCH_YES) | |
4000 | return m; | |
4001 | ||
1a492601 | 4002 | if (get_proc_name (name, &sym, false)) |
6de9cd9a DN |
4003 | return MATCH_ERROR; |
4004 | gfc_new_block = sym; | |
4005 | ||
a8b3b0b6 CR |
4006 | /* Check what next non-whitespace character is so we can tell if there |
4007 | where the required parens if we have a BIND(C). */ | |
4008 | gfc_gobble_whitespace (); | |
4009 | peek_char = gfc_peek_char (); | |
4010 | ||
231b2fcc | 4011 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
4012 | return MATCH_ERROR; |
4013 | ||
4014 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
4015 | return MATCH_ERROR; | |
4016 | ||
a8b3b0b6 CR |
4017 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
4018 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4019 | not allowed for procedures. */ | |
4020 | if (sym->attr.is_bind_c == 1) | |
4021 | { | |
4022 | sym->attr.is_bind_c = 0; | |
4023 | if (sym->old_symbol != NULL) | |
4024 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4025 | "variables or common blocks", | |
4026 | &(sym->old_symbol->declared_at)); | |
4027 | else | |
4028 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4029 | "variables or common blocks", &gfc_current_locus); | |
4030 | } | |
4031 | ||
4032 | /* Here, we are just checking if it has the bind(c) attribute, and if | |
4033 | so, then we need to make sure it's all correct. If it doesn't, | |
4034 | we still need to continue matching the rest of the subroutine line. */ | |
4035 | is_bind_c = gfc_match_bind_c (sym); | |
4036 | if (is_bind_c == MATCH_ERROR) | |
4037 | { | |
4038 | /* There was an attempt at the bind(c), but it was wrong. An | |
4039 | error message should have been printed w/in the gfc_match_bind_c | |
4040 | so here we'll just return the MATCH_ERROR. */ | |
4041 | return MATCH_ERROR; | |
4042 | } | |
4043 | ||
4044 | if (is_bind_c == MATCH_YES) | |
4045 | { | |
4046 | if (peek_char != '(') | |
4047 | { | |
4048 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
4049 | return MATCH_ERROR; | |
4050 | } | |
4051 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) | |
4052 | == FAILURE) | |
4053 | return MATCH_ERROR; | |
4054 | } | |
4055 | ||
6de9cd9a DN |
4056 | if (gfc_match_eos () != MATCH_YES) |
4057 | { | |
4058 | gfc_syntax_error (ST_SUBROUTINE); | |
4059 | return MATCH_ERROR; | |
4060 | } | |
4061 | ||
4062 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4063 | return MATCH_ERROR; | |
4064 | ||
4065 | return MATCH_YES; | |
4066 | } | |
4067 | ||
4068 | ||
a8b3b0b6 CR |
4069 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
4070 | given, and set the binding label in either the given symbol (if not | |
86bf520d | 4071 | NULL), or in the current_ts. The symbol may be NULL because we may |
a8b3b0b6 CR |
4072 | encounter the BIND(C) before the declaration itself. Return |
4073 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, | |
4074 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, | |
4075 | or MATCH_YES if the specifier was correct and the binding label and | |
4076 | bind(c) fields were set correctly for the given symbol or the | |
4077 | current_ts. */ | |
4078 | ||
4079 | match | |
4080 | gfc_match_bind_c (gfc_symbol *sym) | |
4081 | { | |
4082 | /* binding label, if exists */ | |
4083 | char binding_label[GFC_MAX_SYMBOL_LEN + 1]; | |
4084 | match double_quote; | |
4085 | match single_quote; | |
4086 | int has_name_equals = 0; | |
4087 | ||
4088 | /* Initialize the flag that specifies whether we encountered a NAME= | |
4089 | specifier or not. */ | |
4090 | has_name_equals = 0; | |
4091 | ||
4092 | /* Init the first char to nil so we can catch if we don't have | |
4093 | the label (name attr) or the symbol name yet. */ | |
4094 | binding_label[0] = '\0'; | |
4095 | ||
4096 | /* This much we have to be able to match, in this order, if | |
4097 | there is a bind(c) label. */ | |
4098 | if (gfc_match (" bind ( c ") != MATCH_YES) | |
4099 | return MATCH_NO; | |
4100 | ||
4101 | /* Now see if there is a binding label, or if we've reached the | |
4102 | end of the bind(c) attribute without one. */ | |
4103 | if (gfc_match_char (',') == MATCH_YES) | |
4104 | { | |
4105 | if (gfc_match (" name = ") != MATCH_YES) | |
4106 | { | |
4107 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
4108 | "at %C"); | |
4109 | /* should give an error message here */ | |
4110 | return MATCH_ERROR; | |
4111 | } | |
4112 | ||
4113 | has_name_equals = 1; | |
4114 | ||
4115 | /* Get the opening quote. */ | |
4116 | double_quote = MATCH_YES; | |
4117 | single_quote = MATCH_YES; | |
4118 | double_quote = gfc_match_char ('"'); | |
4119 | if (double_quote != MATCH_YES) | |
4120 | single_quote = gfc_match_char ('\''); | |
4121 | if (double_quote != MATCH_YES && single_quote != MATCH_YES) | |
4122 | { | |
4123 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
4124 | "at %C"); | |
4125 | return MATCH_ERROR; | |
4126 | } | |
4127 | ||
4128 | /* Grab the binding label, using functions that will not lower | |
4129 | case the names automatically. */ | |
4130 | if (gfc_match_name_C (binding_label) != MATCH_YES) | |
4131 | return MATCH_ERROR; | |
4132 | ||
4133 | /* Get the closing quotation. */ | |
4134 | if (double_quote == MATCH_YES) | |
4135 | { | |
4136 | if (gfc_match_char ('"') != MATCH_YES) | |
4137 | { | |
4138 | gfc_error ("Missing closing quote '\"' for binding label at %C"); | |
4139 | /* User started string with '"' so looked to match it. */ | |
4140 | return MATCH_ERROR; | |
4141 | } | |
4142 | } | |
4143 | else | |
4144 | { | |
4145 | if (gfc_match_char ('\'') != MATCH_YES) | |
4146 | { | |
4147 | gfc_error ("Missing closing quote '\'' for binding label at %C"); | |
4148 | /* User started string with "'" char. */ | |
4149 | return MATCH_ERROR; | |
4150 | } | |
4151 | } | |
4152 | } | |
4153 | ||
4154 | /* Get the required right paren. */ | |
4155 | if (gfc_match_char (')') != MATCH_YES) | |
4156 | { | |
4157 | gfc_error ("Missing closing paren for binding label at %C"); | |
4158 | return MATCH_ERROR; | |
4159 | } | |
4160 | ||
4161 | /* Save the binding label to the symbol. If sym is null, we're | |
4162 | probably matching the typespec attributes of a declaration and | |
4163 | haven't gotten the name yet, and therefore, no symbol yet. */ | |
4164 | if (binding_label[0] != '\0') | |
4165 | { | |
4166 | if (sym != NULL) | |
4167 | { | |
4168 | strncpy (sym->binding_label, binding_label, | |
4169 | strlen (binding_label)+1); | |
4170 | } | |
4171 | else | |
4172 | strncpy (curr_binding_label, binding_label, | |
4173 | strlen (binding_label) + 1); | |
4174 | } | |
4175 | else | |
4176 | { | |
4177 | /* No binding label, but if symbol isn't null, we | |
4178 | can set the label for it here. */ | |
4179 | /* TODO: If the name= was given and no binding label (name=""), we simply | |
4180 | will let fortran mangle the symbol name as it usually would. | |
4181 | However, this could still let C call it if the user looked up the | |
4182 | symbol in the object file. Should the name set during mangling in | |
4183 | trans-decl.c be marked with characters that are invalid for C to | |
4184 | prevent this? */ | |
4185 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) | |
4186 | strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1); | |
4187 | } | |
9e1d712c | 4188 | |
129d15a3 JW |
4189 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
4190 | && current_interface.type == INTERFACE_ABSTRACT) | |
9e1d712c TB |
4191 | { |
4192 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); | |
4193 | return MATCH_ERROR; | |
4194 | } | |
4195 | ||
a8b3b0b6 CR |
4196 | return MATCH_YES; |
4197 | } | |
4198 | ||
4199 | ||
1f2959f0 | 4200 | /* Return nonzero if we're currently compiling a contained procedure. */ |
ddc9ce91 TS |
4201 | |
4202 | static int | |
4203 | contained_procedure (void) | |
4204 | { | |
4205 | gfc_state_data *s; | |
4206 | ||
4207 | for (s=gfc_state_stack; s; s=s->previous) | |
4208 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) | |
636dff67 | 4209 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) |
ddc9ce91 TS |
4210 | return 1; |
4211 | ||
4212 | return 0; | |
4213 | } | |
4214 | ||
d51347f9 | 4215 | /* Set the kind of each enumerator. The kind is selected such that it is |
25d8f0a2 TS |
4216 | interoperable with the corresponding C enumeration type, making |
4217 | sure that -fshort-enums is honored. */ | |
4218 | ||
4219 | static void | |
4220 | set_enum_kind(void) | |
4221 | { | |
4222 | enumerator_history *current_history = NULL; | |
4223 | int kind; | |
4224 | int i; | |
4225 | ||
4226 | if (max_enum == NULL || enum_history == NULL) | |
4227 | return; | |
4228 | ||
4229 | if (!gfc_option.fshort_enums) | |
d51347f9 TB |
4230 | return; |
4231 | ||
25d8f0a2 TS |
4232 | i = 0; |
4233 | do | |
4234 | { | |
4235 | kind = gfc_integer_kinds[i++].kind; | |
4236 | } | |
d51347f9 | 4237 | while (kind < gfc_c_int_kind |
25d8f0a2 TS |
4238 | && gfc_check_integer_range (max_enum->initializer->value.integer, |
4239 | kind) != ARITH_OK); | |
4240 | ||
4241 | current_history = enum_history; | |
4242 | while (current_history != NULL) | |
4243 | { | |
4244 | current_history->sym->ts.kind = kind; | |
4245 | current_history = current_history->next; | |
4246 | } | |
4247 | } | |
4248 | ||
636dff67 | 4249 | |
6de9cd9a DN |
4250 | /* Match any of the various end-block statements. Returns the type of |
4251 | END to the caller. The END INTERFACE, END IF, END DO and END | |
4252 | SELECT statements cannot be replaced by a single END statement. */ | |
4253 | ||
4254 | match | |
636dff67 | 4255 | gfc_match_end (gfc_statement *st) |
6de9cd9a DN |
4256 | { |
4257 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4258 | gfc_compile_state state; | |
4259 | locus old_loc; | |
4260 | const char *block_name; | |
4261 | const char *target; | |
ddc9ce91 | 4262 | int eos_ok; |
6de9cd9a DN |
4263 | match m; |
4264 | ||
63645982 | 4265 | old_loc = gfc_current_locus; |
6de9cd9a DN |
4266 | if (gfc_match ("end") != MATCH_YES) |
4267 | return MATCH_NO; | |
4268 | ||
4269 | state = gfc_current_state (); | |
636dff67 SK |
4270 | block_name = gfc_current_block () == NULL |
4271 | ? NULL : gfc_current_block ()->name; | |
6de9cd9a DN |
4272 | |
4273 | if (state == COMP_CONTAINS) | |
4274 | { | |
4275 | state = gfc_state_stack->previous->state; | |
636dff67 SK |
4276 | block_name = gfc_state_stack->previous->sym == NULL |
4277 | ? NULL : gfc_state_stack->previous->sym->name; | |
6de9cd9a DN |
4278 | } |
4279 | ||
4280 | switch (state) | |
4281 | { | |
4282 | case COMP_NONE: | |
4283 | case COMP_PROGRAM: | |
4284 | *st = ST_END_PROGRAM; | |
4285 | target = " program"; | |
ddc9ce91 | 4286 | eos_ok = 1; |
6de9cd9a DN |
4287 | break; |
4288 | ||
4289 | case COMP_SUBROUTINE: | |
4290 | *st = ST_END_SUBROUTINE; | |
4291 | target = " subroutine"; | |
ddc9ce91 | 4292 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
4293 | break; |
4294 | ||
4295 | case COMP_FUNCTION: | |
4296 | *st = ST_END_FUNCTION; | |
4297 | target = " function"; | |
ddc9ce91 | 4298 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
4299 | break; |
4300 | ||
4301 | case COMP_BLOCK_DATA: | |
4302 | *st = ST_END_BLOCK_DATA; | |
4303 | target = " block data"; | |
ddc9ce91 | 4304 | eos_ok = 1; |
6de9cd9a DN |
4305 | break; |
4306 | ||
4307 | case COMP_MODULE: | |
4308 | *st = ST_END_MODULE; | |
4309 | target = " module"; | |
ddc9ce91 | 4310 | eos_ok = 1; |
6de9cd9a DN |
4311 | break; |
4312 | ||
4313 | case COMP_INTERFACE: | |
4314 | *st = ST_END_INTERFACE; | |
4315 | target = " interface"; | |
ddc9ce91 | 4316 | eos_ok = 0; |
6de9cd9a DN |
4317 | break; |
4318 | ||
4319 | case COMP_DERIVED: | |
4320 | *st = ST_END_TYPE; | |
4321 | target = " type"; | |
ddc9ce91 | 4322 | eos_ok = 0; |
6de9cd9a DN |
4323 | break; |
4324 | ||
4325 | case COMP_IF: | |
4326 | *st = ST_ENDIF; | |
4327 | target = " if"; | |
ddc9ce91 | 4328 | eos_ok = 0; |
6de9cd9a DN |
4329 | break; |
4330 | ||
4331 | case COMP_DO: | |
4332 | *st = ST_ENDDO; | |
4333 | target = " do"; | |
ddc9ce91 | 4334 | eos_ok = 0; |
6de9cd9a DN |
4335 | break; |
4336 | ||
4337 | case COMP_SELECT: | |
4338 | *st = ST_END_SELECT; | |
4339 | target = " select"; | |
ddc9ce91 | 4340 | eos_ok = 0; |
6de9cd9a DN |
4341 | break; |
4342 | ||
4343 | case COMP_FORALL: | |
4344 | *st = ST_END_FORALL; | |
4345 | target = " forall"; | |
ddc9ce91 | 4346 | eos_ok = 0; |
6de9cd9a DN |
4347 | break; |
4348 | ||
4349 | case COMP_WHERE: | |
4350 | *st = ST_END_WHERE; | |
4351 | target = " where"; | |
ddc9ce91 | 4352 | eos_ok = 0; |
6de9cd9a DN |
4353 | break; |
4354 | ||
25d8f0a2 TS |
4355 | case COMP_ENUM: |
4356 | *st = ST_END_ENUM; | |
4357 | target = " enum"; | |
4358 | eos_ok = 0; | |
4359 | last_initializer = NULL; | |
4360 | set_enum_kind (); | |
4361 | gfc_free_enum_history (); | |
4362 | break; | |
4363 | ||
6de9cd9a DN |
4364 | default: |
4365 | gfc_error ("Unexpected END statement at %C"); | |
4366 | goto cleanup; | |
4367 | } | |
4368 | ||
4369 | if (gfc_match_eos () == MATCH_YES) | |
4370 | { | |
ddc9ce91 | 4371 | if (!eos_ok) |
6de9cd9a | 4372 | { |
66e4ab31 | 4373 | /* We would have required END [something]. */ |
59ce85b5 TS |
4374 | gfc_error ("%s statement expected at %L", |
4375 | gfc_ascii_statement (*st), &old_loc); | |
6de9cd9a DN |
4376 | goto cleanup; |
4377 | } | |
4378 | ||
4379 | return MATCH_YES; | |
4380 | } | |
4381 | ||
4382 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
4383 | if (gfc_match (target) != MATCH_YES) | |
4384 | { | |
4385 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
4386 | goto cleanup; | |
4387 | } | |
4388 | ||
4389 | /* If we're at the end, make sure a block name wasn't required. */ | |
4390 | if (gfc_match_eos () == MATCH_YES) | |
4391 | { | |
4392 | ||
690af379 TS |
4393 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT |
4394 | && *st != ST_END_FORALL && *st != ST_END_WHERE) | |
6de9cd9a DN |
4395 | return MATCH_YES; |
4396 | ||
4397 | if (gfc_current_block () == NULL) | |
4398 | return MATCH_YES; | |
4399 | ||
4400 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
4401 | block_name, gfc_ascii_statement (*st)); | |
4402 | ||
4403 | return MATCH_ERROR; | |
4404 | } | |
4405 | ||
4406 | /* END INTERFACE has a special handler for its several possible endings. */ | |
4407 | if (*st == ST_END_INTERFACE) | |
4408 | return gfc_match_end_interface (); | |
4409 | ||
66e4ab31 SK |
4410 | /* We haven't hit the end of statement, so what is left must be an |
4411 | end-name. */ | |
6de9cd9a DN |
4412 | m = gfc_match_space (); |
4413 | if (m == MATCH_YES) | |
4414 | m = gfc_match_name (name); | |
4415 | ||
4416 | if (m == MATCH_NO) | |
4417 | gfc_error ("Expected terminating name at %C"); | |
4418 | if (m != MATCH_YES) | |
4419 | goto cleanup; | |
4420 | ||
4421 | if (block_name == NULL) | |
4422 | goto syntax; | |
4423 | ||
4424 | if (strcmp (name, block_name) != 0) | |
4425 | { | |
4426 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
4427 | gfc_ascii_statement (*st)); | |
4428 | goto cleanup; | |
4429 | } | |
4430 | ||
4431 | if (gfc_match_eos () == MATCH_YES) | |
4432 | return MATCH_YES; | |
4433 | ||
4434 | syntax: | |
4435 | gfc_syntax_error (*st); | |
4436 | ||
4437 | cleanup: | |
63645982 | 4438 | gfc_current_locus = old_loc; |
6de9cd9a DN |
4439 | return MATCH_ERROR; |
4440 | } | |
4441 | ||
4442 | ||
4443 | ||
4444 | /***************** Attribute declaration statements ****************/ | |
4445 | ||
4446 | /* Set the attribute of a single variable. */ | |
4447 | ||
4448 | static match | |
4449 | attr_decl1 (void) | |
4450 | { | |
4451 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4452 | gfc_array_spec *as; | |
4453 | gfc_symbol *sym; | |
4454 | locus var_locus; | |
4455 | match m; | |
4456 | ||
4457 | as = NULL; | |
4458 | ||
4459 | m = gfc_match_name (name); | |
4460 | if (m != MATCH_YES) | |
4461 | goto cleanup; | |
4462 | ||
4463 | if (find_special (name, &sym)) | |
4464 | return MATCH_ERROR; | |
4465 | ||
63645982 | 4466 | var_locus = gfc_current_locus; |
6de9cd9a DN |
4467 | |
4468 | /* Deal with possible array specification for certain attributes. */ | |
4469 | if (current_attr.dimension | |
4470 | || current_attr.allocatable | |
4471 | || current_attr.pointer | |
4472 | || current_attr.target) | |
4473 | { | |
4474 | m = gfc_match_array_spec (&as); | |
4475 | if (m == MATCH_ERROR) | |
4476 | goto cleanup; | |
4477 | ||
4478 | if (current_attr.dimension && m == MATCH_NO) | |
4479 | { | |
636dff67 SK |
4480 | gfc_error ("Missing array specification at %L in DIMENSION " |
4481 | "statement", &var_locus); | |
6de9cd9a DN |
4482 | m = MATCH_ERROR; |
4483 | goto cleanup; | |
4484 | } | |
4485 | ||
4486 | if ((current_attr.allocatable || current_attr.pointer) | |
4487 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
4488 | { | |
636dff67 | 4489 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
6de9cd9a DN |
4490 | m = MATCH_ERROR; |
4491 | goto cleanup; | |
4492 | } | |
4493 | } | |
4494 | ||
636dff67 SK |
4495 | /* Update symbol table. DIMENSION attribute is set |
4496 | in gfc_set_array_spec(). */ | |
6de9cd9a DN |
4497 | if (current_attr.dimension == 0 |
4498 | && gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
4499 | { | |
4500 | m = MATCH_ERROR; | |
4501 | goto cleanup; | |
4502 | } | |
4503 | ||
4504 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
4505 | { | |
4506 | m = MATCH_ERROR; | |
4507 | goto cleanup; | |
4508 | } | |
d51347f9 | 4509 | |
83d890b9 AL |
4510 | if (sym->attr.cray_pointee && sym->as != NULL) |
4511 | { | |
4512 | /* Fix the array spec. */ | |
4513 | m = gfc_mod_pointee_as (sym->as); | |
4514 | if (m == MATCH_ERROR) | |
4515 | goto cleanup; | |
4516 | } | |
6de9cd9a | 4517 | |
7114edca | 4518 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
1902704e PT |
4519 | { |
4520 | m = MATCH_ERROR; | |
4521 | goto cleanup; | |
4522 | } | |
4523 | ||
6de9cd9a DN |
4524 | if ((current_attr.external || current_attr.intrinsic) |
4525 | && sym->attr.flavor != FL_PROCEDURE | |
231b2fcc | 4526 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
4527 | { |
4528 | m = MATCH_ERROR; | |
4529 | goto cleanup; | |
4530 | } | |
4531 | ||
4532 | return MATCH_YES; | |
4533 | ||
4534 | cleanup: | |
4535 | gfc_free_array_spec (as); | |
4536 | return m; | |
4537 | } | |
4538 | ||
4539 | ||
4540 | /* Generic attribute declaration subroutine. Used for attributes that | |
4541 | just have a list of names. */ | |
4542 | ||
4543 | static match | |
4544 | attr_decl (void) | |
4545 | { | |
4546 | match m; | |
4547 | ||
4548 | /* Gobble the optional double colon, by simply ignoring the result | |
4549 | of gfc_match(). */ | |
4550 | gfc_match (" ::"); | |
4551 | ||
4552 | for (;;) | |
4553 | { | |
4554 | m = attr_decl1 (); | |
4555 | if (m != MATCH_YES) | |
4556 | break; | |
4557 | ||
4558 | if (gfc_match_eos () == MATCH_YES) | |
4559 | { | |
4560 | m = MATCH_YES; | |
4561 | break; | |
4562 | } | |
4563 | ||
4564 | if (gfc_match_char (',') != MATCH_YES) | |
4565 | { | |
4566 | gfc_error ("Unexpected character in variable list at %C"); | |
4567 | m = MATCH_ERROR; | |
4568 | break; | |
4569 | } | |
4570 | } | |
4571 | ||
4572 | return m; | |
4573 | } | |
4574 | ||
4575 | ||
83d890b9 AL |
4576 | /* This routine matches Cray Pointer declarations of the form: |
4577 | pointer ( <pointer>, <pointee> ) | |
4578 | or | |
d51347f9 TB |
4579 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
4580 | The pointer, if already declared, should be an integer. Otherwise, we | |
83d890b9 AL |
4581 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
4582 | be either a scalar, or an array declaration. No space is allocated for | |
d51347f9 | 4583 | the pointee. For the statement |
83d890b9 AL |
4584 | pointer (ipt, ar(10)) |
4585 | any subsequent uses of ar will be translated (in C-notation) as | |
d51347f9 | 4586 | ar(i) => ((<type> *) ipt)(i) |
b122dc6a | 4587 | After gimplification, pointee variable will disappear in the code. */ |
83d890b9 AL |
4588 | |
4589 | static match | |
4590 | cray_pointer_decl (void) | |
4591 | { | |
4592 | match m; | |
4593 | gfc_array_spec *as; | |
4594 | gfc_symbol *cptr; /* Pointer symbol. */ | |
4595 | gfc_symbol *cpte; /* Pointee symbol. */ | |
4596 | locus var_locus; | |
4597 | bool done = false; | |
4598 | ||
4599 | while (!done) | |
4600 | { | |
4601 | if (gfc_match_char ('(') != MATCH_YES) | |
4602 | { | |
4603 | gfc_error ("Expected '(' at %C"); | |
d51347f9 | 4604 | return MATCH_ERROR; |
83d890b9 | 4605 | } |
d51347f9 | 4606 | |
83d890b9 AL |
4607 | /* Match pointer. */ |
4608 | var_locus = gfc_current_locus; | |
4609 | gfc_clear_attr (¤t_attr); | |
4610 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
4611 | current_ts.type = BT_INTEGER; | |
4612 | current_ts.kind = gfc_index_integer_kind; | |
4613 | ||
d51347f9 | 4614 | m = gfc_match_symbol (&cptr, 0); |
83d890b9 AL |
4615 | if (m != MATCH_YES) |
4616 | { | |
4617 | gfc_error ("Expected variable name at %C"); | |
4618 | return m; | |
4619 | } | |
d51347f9 | 4620 | |
83d890b9 AL |
4621 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) |
4622 | return MATCH_ERROR; | |
4623 | ||
d51347f9 | 4624 | gfc_set_sym_referenced (cptr); |
83d890b9 AL |
4625 | |
4626 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
4627 | { | |
4628 | cptr->ts.type = BT_INTEGER; | |
d51347f9 | 4629 | cptr->ts.kind = gfc_index_integer_kind; |
83d890b9 AL |
4630 | } |
4631 | else if (cptr->ts.type != BT_INTEGER) | |
4632 | { | |
e25a0da3 | 4633 | gfc_error ("Cray pointer at %C must be an integer"); |
83d890b9 AL |
4634 | return MATCH_ERROR; |
4635 | } | |
4636 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
4637 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
e25a0da3 | 4638 | " memory addresses require %d bytes", |
636dff67 | 4639 | cptr->ts.kind, gfc_index_integer_kind); |
83d890b9 AL |
4640 | |
4641 | if (gfc_match_char (',') != MATCH_YES) | |
4642 | { | |
4643 | gfc_error ("Expected \",\" at %C"); | |
d51347f9 | 4644 | return MATCH_ERROR; |
83d890b9 AL |
4645 | } |
4646 | ||
d51347f9 | 4647 | /* Match Pointee. */ |
83d890b9 AL |
4648 | var_locus = gfc_current_locus; |
4649 | gfc_clear_attr (¤t_attr); | |
4650 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
4651 | current_ts.type = BT_UNKNOWN; | |
4652 | current_ts.kind = 0; | |
4653 | ||
4654 | m = gfc_match_symbol (&cpte, 0); | |
4655 | if (m != MATCH_YES) | |
4656 | { | |
4657 | gfc_error ("Expected variable name at %C"); | |
4658 | return m; | |
4659 | } | |
d51347f9 | 4660 | |
83d890b9 AL |
4661 | /* Check for an optional array spec. */ |
4662 | m = gfc_match_array_spec (&as); | |
4663 | if (m == MATCH_ERROR) | |
4664 | { | |
4665 | gfc_free_array_spec (as); | |
4666 | return m; | |
4667 | } | |
4668 | else if (m == MATCH_NO) | |
4669 | { | |
4670 | gfc_free_array_spec (as); | |
4671 | as = NULL; | |
4672 | } | |
4673 | ||
4674 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
4675 | return MATCH_ERROR; | |
4676 | ||
4677 | gfc_set_sym_referenced (cpte); | |
4678 | ||
4679 | if (cpte->as == NULL) | |
4680 | { | |
4681 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
4682 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
4683 | } | |
4684 | else if (as != NULL) | |
4685 | { | |
e25a0da3 | 4686 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
83d890b9 AL |
4687 | gfc_free_array_spec (as); |
4688 | return MATCH_ERROR; | |
4689 | } | |
4690 | ||
4691 | as = NULL; | |
4692 | ||
4693 | if (cpte->as != NULL) | |
4694 | { | |
4695 | /* Fix array spec. */ | |
4696 | m = gfc_mod_pointee_as (cpte->as); | |
4697 | if (m == MATCH_ERROR) | |
4698 | return m; | |
4699 | } | |
4700 | ||
4701 | /* Point the Pointee at the Pointer. */ | |
b122dc6a | 4702 | cpte->cp_pointer = cptr; |
83d890b9 AL |
4703 | |
4704 | if (gfc_match_char (')') != MATCH_YES) | |
4705 | { | |
4706 | gfc_error ("Expected \")\" at %C"); | |
4707 | return MATCH_ERROR; | |
4708 | } | |
4709 | m = gfc_match_char (','); | |
4710 | if (m != MATCH_YES) | |
4711 | done = true; /* Stop searching for more declarations. */ | |
4712 | ||
4713 | } | |
4714 | ||
4715 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
4716 | || gfc_match_eos () != MATCH_YES) | |
4717 | { | |
4718 | gfc_error ("Expected \",\" or end of statement at %C"); | |
4719 | return MATCH_ERROR; | |
4720 | } | |
4721 | return MATCH_YES; | |
4722 | } | |
4723 | ||
4724 | ||
6de9cd9a DN |
4725 | match |
4726 | gfc_match_external (void) | |
4727 | { | |
4728 | ||
4729 | gfc_clear_attr (¤t_attr); | |
1902704e | 4730 | current_attr.external = 1; |
6de9cd9a DN |
4731 | |
4732 | return attr_decl (); | |
4733 | } | |
4734 | ||
4735 | ||
6de9cd9a DN |
4736 | match |
4737 | gfc_match_intent (void) | |
4738 | { | |
4739 | sym_intent intent; | |
4740 | ||
4741 | intent = match_intent_spec (); | |
4742 | if (intent == INTENT_UNKNOWN) | |
4743 | return MATCH_ERROR; | |
4744 | ||
4745 | gfc_clear_attr (¤t_attr); | |
1902704e | 4746 | current_attr.intent = intent; |
6de9cd9a DN |
4747 | |
4748 | return attr_decl (); | |
4749 | } | |
4750 | ||
4751 | ||
4752 | match | |
4753 | gfc_match_intrinsic (void) | |
4754 | { | |
4755 | ||
4756 | gfc_clear_attr (¤t_attr); | |
1902704e | 4757 | current_attr.intrinsic = 1; |
6de9cd9a DN |
4758 | |
4759 | return attr_decl (); | |
4760 | } | |
4761 | ||
4762 | ||
4763 | match | |
4764 | gfc_match_optional (void) | |
4765 | { | |
4766 | ||
4767 | gfc_clear_attr (¤t_attr); | |
1902704e | 4768 | current_attr.optional = 1; |
6de9cd9a DN |
4769 | |
4770 | return attr_decl (); | |
4771 | } | |
4772 | ||
4773 | ||
4774 | match | |
4775 | gfc_match_pointer (void) | |
4776 | { | |
83d890b9 AL |
4777 | gfc_gobble_whitespace (); |
4778 | if (gfc_peek_char () == '(') | |
4779 | { | |
4780 | if (!gfc_option.flag_cray_pointer) | |
4781 | { | |
636dff67 SK |
4782 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
4783 | "flag"); | |
83d890b9 AL |
4784 | return MATCH_ERROR; |
4785 | } | |
4786 | return cray_pointer_decl (); | |
4787 | } | |
4788 | else | |
4789 | { | |
4790 | gfc_clear_attr (¤t_attr); | |
1902704e | 4791 | current_attr.pointer = 1; |
83d890b9 AL |
4792 | |
4793 | return attr_decl (); | |
4794 | } | |
6de9cd9a DN |
4795 | } |
4796 | ||
4797 | ||
4798 | match | |
4799 | gfc_match_allocatable (void) | |
4800 | { | |
6de9cd9a | 4801 | gfc_clear_attr (¤t_attr); |
1902704e | 4802 | current_attr.allocatable = 1; |
6de9cd9a DN |
4803 | |
4804 | return attr_decl (); | |
4805 | } | |
4806 | ||
4807 | ||
4808 | match | |
4809 | gfc_match_dimension (void) | |
4810 | { | |
6de9cd9a | 4811 | gfc_clear_attr (¤t_attr); |
1902704e | 4812 | current_attr.dimension = 1; |
6de9cd9a DN |
4813 | |
4814 | return attr_decl (); | |
4815 | } | |
4816 | ||
4817 | ||
4818 | match | |
4819 | gfc_match_target (void) | |
4820 | { | |
6de9cd9a | 4821 | gfc_clear_attr (¤t_attr); |
1902704e | 4822 | current_attr.target = 1; |
6de9cd9a DN |
4823 | |
4824 | return attr_decl (); | |
4825 | } | |
4826 | ||
4827 | ||
4828 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
4829 | statement. */ | |
4830 | ||
4831 | static match | |
4832 | access_attr_decl (gfc_statement st) | |
4833 | { | |
4834 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4835 | interface_type type; | |
4836 | gfc_user_op *uop; | |
4837 | gfc_symbol *sym; | |
4838 | gfc_intrinsic_op operator; | |
4839 | match m; | |
4840 | ||
4841 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
4842 | goto done; | |
4843 | ||
4844 | for (;;) | |
4845 | { | |
4846 | m = gfc_match_generic_spec (&type, name, &operator); | |
4847 | if (m == MATCH_NO) | |
4848 | goto syntax; | |
4849 | if (m == MATCH_ERROR) | |
4850 | return MATCH_ERROR; | |
4851 | ||
4852 | switch (type) | |
4853 | { | |
4854 | case INTERFACE_NAMELESS: | |
9e1d712c | 4855 | case INTERFACE_ABSTRACT: |
6de9cd9a DN |
4856 | goto syntax; |
4857 | ||
4858 | case INTERFACE_GENERIC: | |
4859 | if (gfc_get_symbol (name, NULL, &sym)) | |
4860 | goto done; | |
4861 | ||
636dff67 SK |
4862 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
4863 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
231b2fcc | 4864 | sym->name, NULL) == FAILURE) |
6de9cd9a DN |
4865 | return MATCH_ERROR; |
4866 | ||
4867 | break; | |
4868 | ||
4869 | case INTERFACE_INTRINSIC_OP: | |
4870 | if (gfc_current_ns->operator_access[operator] == ACCESS_UNKNOWN) | |
4871 | { | |
4872 | gfc_current_ns->operator_access[operator] = | |
4873 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
4874 | } | |
4875 | else | |
4876 | { | |
4877 | gfc_error ("Access specification of the %s operator at %C has " | |
4878 | "already been specified", gfc_op2string (operator)); | |
4879 | goto done; | |
4880 | } | |
4881 | ||
4882 | break; | |
4883 | ||
4884 | case INTERFACE_USER_OP: | |
4885 | uop = gfc_get_uop (name); | |
4886 | ||
4887 | if (uop->access == ACCESS_UNKNOWN) | |
4888 | { | |
636dff67 SK |
4889 | uop->access = (st == ST_PUBLIC) |
4890 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
6de9cd9a DN |
4891 | } |
4892 | else | |
4893 | { | |
636dff67 SK |
4894 | gfc_error ("Access specification of the .%s. operator at %C " |
4895 | "has already been specified", sym->name); | |
6de9cd9a DN |
4896 | goto done; |
4897 | } | |
4898 | ||
4899 | break; | |
4900 | } | |
4901 | ||
4902 | if (gfc_match_char (',') == MATCH_NO) | |
4903 | break; | |
4904 | } | |
4905 | ||
4906 | if (gfc_match_eos () != MATCH_YES) | |
4907 | goto syntax; | |
4908 | return MATCH_YES; | |
4909 | ||
4910 | syntax: | |
4911 | gfc_syntax_error (st); | |
4912 | ||
4913 | done: | |
4914 | return MATCH_ERROR; | |
4915 | } | |
4916 | ||
4917 | ||
ee7e677f TB |
4918 | match |
4919 | gfc_match_protected (void) | |
4920 | { | |
4921 | gfc_symbol *sym; | |
4922 | match m; | |
4923 | ||
4924 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
4925 | { | |
4926 | gfc_error ("PROTECTED at %C only allowed in specification " | |
4927 | "part of a module"); | |
4928 | return MATCH_ERROR; | |
4929 | ||
4930 | } | |
4931 | ||
636dff67 | 4932 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
ee7e677f TB |
4933 | == FAILURE) |
4934 | return MATCH_ERROR; | |
4935 | ||
4936 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
4937 | { | |
4938 | return MATCH_ERROR; | |
4939 | } | |
4940 | ||
4941 | if (gfc_match_eos () == MATCH_YES) | |
4942 | goto syntax; | |
4943 | ||
4944 | for(;;) | |
4945 | { | |
4946 | m = gfc_match_symbol (&sym, 0); | |
4947 | switch (m) | |
4948 | { | |
4949 | case MATCH_YES: | |
636dff67 SK |
4950 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
4951 | == FAILURE) | |
ee7e677f TB |
4952 | return MATCH_ERROR; |
4953 | goto next_item; | |
4954 | ||
4955 | case MATCH_NO: | |
4956 | break; | |
4957 | ||
4958 | case MATCH_ERROR: | |
4959 | return MATCH_ERROR; | |
4960 | } | |
4961 | ||
4962 | next_item: | |
4963 | if (gfc_match_eos () == MATCH_YES) | |
4964 | break; | |
4965 | if (gfc_match_char (',') != MATCH_YES) | |
4966 | goto syntax; | |
4967 | } | |
4968 | ||
4969 | return MATCH_YES; | |
4970 | ||
4971 | syntax: | |
4972 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
4973 | return MATCH_ERROR; | |
4974 | } | |
4975 | ||
4976 | ||
86bf520d | 4977 | /* The PRIVATE statement is a bit weird in that it can be an attribute |
6de9cd9a DN |
4978 | declaration, but also works as a standlone statement inside of a |
4979 | type declaration or a module. */ | |
4980 | ||
4981 | match | |
636dff67 | 4982 | gfc_match_private (gfc_statement *st) |
6de9cd9a DN |
4983 | { |
4984 | ||
4985 | if (gfc_match ("private") != MATCH_YES) | |
4986 | return MATCH_NO; | |
4987 | ||
d51347f9 TB |
4988 | if (gfc_current_state () != COMP_MODULE |
4989 | && (gfc_current_state () != COMP_DERIVED | |
4990 | || !gfc_state_stack->previous | |
4991 | || gfc_state_stack->previous->state != COMP_MODULE)) | |
4992 | { | |
4993 | gfc_error ("PRIVATE statement at %C is only allowed in the " | |
4994 | "specification part of a module"); | |
4995 | return MATCH_ERROR; | |
4996 | } | |
4997 | ||
6de9cd9a DN |
4998 | if (gfc_current_state () == COMP_DERIVED) |
4999 | { | |
5000 | if (gfc_match_eos () == MATCH_YES) | |
5001 | { | |
5002 | *st = ST_PRIVATE; | |
5003 | return MATCH_YES; | |
5004 | } | |
5005 | ||
5006 | gfc_syntax_error (ST_PRIVATE); | |
5007 | return MATCH_ERROR; | |
5008 | } | |
5009 | ||
5010 | if (gfc_match_eos () == MATCH_YES) | |
5011 | { | |
5012 | *st = ST_PRIVATE; | |
5013 | return MATCH_YES; | |
5014 | } | |
5015 | ||
5016 | *st = ST_ATTR_DECL; | |
5017 | return access_attr_decl (ST_PRIVATE); | |
5018 | } | |
5019 | ||
5020 | ||
5021 | match | |
636dff67 | 5022 | gfc_match_public (gfc_statement *st) |
6de9cd9a DN |
5023 | { |
5024 | ||
5025 | if (gfc_match ("public") != MATCH_YES) | |
5026 | return MATCH_NO; | |
5027 | ||
d51347f9 TB |
5028 | if (gfc_current_state () != COMP_MODULE) |
5029 | { | |
5030 | gfc_error ("PUBLIC statement at %C is only allowed in the " | |
5031 | "specification part of a module"); | |
5032 | return MATCH_ERROR; | |
5033 | } | |
5034 | ||
6de9cd9a DN |
5035 | if (gfc_match_eos () == MATCH_YES) |
5036 | { | |
5037 | *st = ST_PUBLIC; | |
5038 | return MATCH_YES; | |
5039 | } | |
5040 | ||
5041 | *st = ST_ATTR_DECL; | |
5042 | return access_attr_decl (ST_PUBLIC); | |
5043 | } | |
5044 | ||
5045 | ||
5046 | /* Workhorse for gfc_match_parameter. */ | |
5047 | ||
5048 | static match | |
5049 | do_parm (void) | |
5050 | { | |
5051 | gfc_symbol *sym; | |
5052 | gfc_expr *init; | |
5053 | match m; | |
5054 | ||
5055 | m = gfc_match_symbol (&sym, 0); | |
5056 | if (m == MATCH_NO) | |
5057 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
5058 | ||
5059 | if (m != MATCH_YES) | |
5060 | return m; | |
5061 | ||
5062 | if (gfc_match_char ('=') == MATCH_NO) | |
5063 | { | |
5064 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
5065 | return MATCH_ERROR; | |
5066 | } | |
5067 | ||
5068 | m = gfc_match_init_expr (&init); | |
5069 | if (m == MATCH_NO) | |
5070 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
5071 | if (m != MATCH_YES) | |
5072 | return m; | |
5073 | ||
5074 | if (sym->ts.type == BT_UNKNOWN | |
5075 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
5076 | { | |
5077 | m = MATCH_ERROR; | |
5078 | goto cleanup; | |
5079 | } | |
5080 | ||
5081 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
231b2fcc | 5082 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
5083 | { |
5084 | m = MATCH_ERROR; | |
5085 | goto cleanup; | |
5086 | } | |
5087 | ||
7e2eba4b DE |
5088 | if (sym->ts.type == BT_CHARACTER |
5089 | && sym->ts.cl != NULL | |
5090 | && sym->ts.cl->length != NULL | |
5091 | && sym->ts.cl->length->expr_type == EXPR_CONSTANT | |
5092 | && init->expr_type == EXPR_CONSTANT | |
5093 | && init->ts.type == BT_CHARACTER | |
5094 | && init->ts.kind == 1) | |
5095 | gfc_set_constant_character_len ( | |
2220652d | 5096 | mpz_get_si (sym->ts.cl->length->value.integer), init, false); |
7e2eba4b | 5097 | |
6de9cd9a DN |
5098 | sym->value = init; |
5099 | return MATCH_YES; | |
5100 | ||
5101 | cleanup: | |
5102 | gfc_free_expr (init); | |
5103 | return m; | |
5104 | } | |
5105 | ||
5106 | ||
5107 | /* Match a parameter statement, with the weird syntax that these have. */ | |
5108 | ||
5109 | match | |
5110 | gfc_match_parameter (void) | |
5111 | { | |
5112 | match m; | |
5113 | ||
5114 | if (gfc_match_char ('(') == MATCH_NO) | |
5115 | return MATCH_NO; | |
5116 | ||
5117 | for (;;) | |
5118 | { | |
5119 | m = do_parm (); | |
5120 | if (m != MATCH_YES) | |
5121 | break; | |
5122 | ||
5123 | if (gfc_match (" )%t") == MATCH_YES) | |
5124 | break; | |
5125 | ||
5126 | if (gfc_match_char (',') != MATCH_YES) | |
5127 | { | |
5128 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
5129 | m = MATCH_ERROR; | |
5130 | break; | |
5131 | } | |
5132 | } | |
5133 | ||
5134 | return m; | |
5135 | } | |
5136 | ||
5137 | ||
5138 | /* Save statements have a special syntax. */ | |
5139 | ||
5140 | match | |
5141 | gfc_match_save (void) | |
5142 | { | |
9056bd70 TS |
5143 | char n[GFC_MAX_SYMBOL_LEN+1]; |
5144 | gfc_common_head *c; | |
6de9cd9a DN |
5145 | gfc_symbol *sym; |
5146 | match m; | |
5147 | ||
5148 | if (gfc_match_eos () == MATCH_YES) | |
5149 | { | |
5150 | if (gfc_current_ns->seen_save) | |
5151 | { | |
636dff67 SK |
5152 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
5153 | "follows previous SAVE statement") | |
09e87839 AL |
5154 | == FAILURE) |
5155 | return MATCH_ERROR; | |
6de9cd9a DN |
5156 | } |
5157 | ||
5158 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
5159 | return MATCH_YES; | |
5160 | } | |
5161 | ||
5162 | if (gfc_current_ns->save_all) | |
5163 | { | |
636dff67 SK |
5164 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
5165 | "blanket SAVE statement") | |
09e87839 AL |
5166 | == FAILURE) |
5167 | return MATCH_ERROR; | |
6de9cd9a DN |
5168 | } |
5169 | ||
5170 | gfc_match (" ::"); | |
5171 | ||
5172 | for (;;) | |
5173 | { | |
5174 | m = gfc_match_symbol (&sym, 0); | |
5175 | switch (m) | |
5176 | { | |
5177 | case MATCH_YES: | |
636dff67 SK |
5178 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
5179 | == FAILURE) | |
6de9cd9a DN |
5180 | return MATCH_ERROR; |
5181 | goto next_item; | |
5182 | ||
5183 | case MATCH_NO: | |
5184 | break; | |
5185 | ||
5186 | case MATCH_ERROR: | |
5187 | return MATCH_ERROR; | |
5188 | } | |
5189 | ||
9056bd70 | 5190 | m = gfc_match (" / %n /", &n); |
6de9cd9a DN |
5191 | if (m == MATCH_ERROR) |
5192 | return MATCH_ERROR; | |
5193 | if (m == MATCH_NO) | |
5194 | goto syntax; | |
5195 | ||
53814b8f | 5196 | c = gfc_get_common (n, 0); |
9056bd70 TS |
5197 | c->saved = 1; |
5198 | ||
6de9cd9a DN |
5199 | gfc_current_ns->seen_save = 1; |
5200 | ||
5201 | next_item: | |
5202 | if (gfc_match_eos () == MATCH_YES) | |
5203 | break; | |
5204 | if (gfc_match_char (',') != MATCH_YES) | |
5205 | goto syntax; | |
5206 | } | |
5207 | ||
5208 | return MATCH_YES; | |
5209 | ||
5210 | syntax: | |
5211 | gfc_error ("Syntax error in SAVE statement at %C"); | |
5212 | return MATCH_ERROR; | |
5213 | } | |
5214 | ||
5215 | ||
06469efd PT |
5216 | match |
5217 | gfc_match_value (void) | |
5218 | { | |
5219 | gfc_symbol *sym; | |
5220 | match m; | |
5221 | ||
636dff67 | 5222 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
06469efd PT |
5223 | == FAILURE) |
5224 | return MATCH_ERROR; | |
5225 | ||
5226 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5227 | { | |
5228 | return MATCH_ERROR; | |
5229 | } | |
5230 | ||
5231 | if (gfc_match_eos () == MATCH_YES) | |
5232 | goto syntax; | |
5233 | ||
5234 | for(;;) | |
5235 | { | |
5236 | m = gfc_match_symbol (&sym, 0); | |
5237 | switch (m) | |
5238 | { | |
5239 | case MATCH_YES: | |
636dff67 SK |
5240 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
5241 | == FAILURE) | |
06469efd PT |
5242 | return MATCH_ERROR; |
5243 | goto next_item; | |
5244 | ||
5245 | case MATCH_NO: | |
5246 | break; | |
5247 | ||
5248 | case MATCH_ERROR: | |
5249 | return MATCH_ERROR; | |
5250 | } | |
5251 | ||
5252 | next_item: | |
5253 | if (gfc_match_eos () == MATCH_YES) | |
5254 | break; | |
5255 | if (gfc_match_char (',') != MATCH_YES) | |
5256 | goto syntax; | |
5257 | } | |
5258 | ||
5259 | return MATCH_YES; | |
5260 | ||
5261 | syntax: | |
5262 | gfc_error ("Syntax error in VALUE statement at %C"); | |
5263 | return MATCH_ERROR; | |
5264 | } | |
5265 | ||
66e4ab31 | 5266 | |
775e6c3a TB |
5267 | match |
5268 | gfc_match_volatile (void) | |
5269 | { | |
5270 | gfc_symbol *sym; | |
5271 | match m; | |
5272 | ||
636dff67 | 5273 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
775e6c3a TB |
5274 | == FAILURE) |
5275 | return MATCH_ERROR; | |
5276 | ||
5277 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5278 | { | |
5279 | return MATCH_ERROR; | |
5280 | } | |
5281 | ||
5282 | if (gfc_match_eos () == MATCH_YES) | |
5283 | goto syntax; | |
5284 | ||
5285 | for(;;) | |
5286 | { | |
9bce3c1c TB |
5287 | /* VOLATILE is special because it can be added to host-associated |
5288 | symbols locally. */ | |
5289 | m = gfc_match_symbol (&sym, 1); | |
775e6c3a TB |
5290 | switch (m) |
5291 | { | |
5292 | case MATCH_YES: | |
636dff67 SK |
5293 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
5294 | == FAILURE) | |
775e6c3a TB |
5295 | return MATCH_ERROR; |
5296 | goto next_item; | |
5297 | ||
5298 | case MATCH_NO: | |
5299 | break; | |
5300 | ||
5301 | case MATCH_ERROR: | |
5302 | return MATCH_ERROR; | |
5303 | } | |
5304 | ||
5305 | next_item: | |
5306 | if (gfc_match_eos () == MATCH_YES) | |
5307 | break; | |
5308 | if (gfc_match_char (',') != MATCH_YES) | |
5309 | goto syntax; | |
5310 | } | |
5311 | ||
5312 | return MATCH_YES; | |
5313 | ||
5314 | syntax: | |
5315 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
5316 | return MATCH_ERROR; | |
5317 | } | |
5318 | ||
5319 | ||
6de9cd9a DN |
5320 | /* Match a module procedure statement. Note that we have to modify |
5321 | symbols in the parent's namespace because the current one was there | |
49de9e73 | 5322 | to receive symbols that are in an interface's formal argument list. */ |
6de9cd9a DN |
5323 | |
5324 | match | |
5325 | gfc_match_modproc (void) | |
5326 | { | |
5327 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5328 | gfc_symbol *sym; | |
5329 | match m; | |
060fca4a | 5330 | gfc_namespace *module_ns; |
6de9cd9a DN |
5331 | |
5332 | if (gfc_state_stack->state != COMP_INTERFACE | |
5333 | || gfc_state_stack->previous == NULL | |
129d15a3 JW |
5334 | || current_interface.type == INTERFACE_NAMELESS |
5335 | || current_interface.type == INTERFACE_ABSTRACT) | |
6de9cd9a | 5336 | { |
636dff67 SK |
5337 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
5338 | "interface"); | |
6de9cd9a DN |
5339 | return MATCH_ERROR; |
5340 | } | |
5341 | ||
060fca4a PT |
5342 | module_ns = gfc_current_ns->parent; |
5343 | for (; module_ns; module_ns = module_ns->parent) | |
5344 | if (module_ns->proc_name->attr.flavor == FL_MODULE) | |
5345 | break; | |
5346 | ||
5347 | if (module_ns == NULL) | |
5348 | return MATCH_ERROR; | |
5349 | ||
6de9cd9a DN |
5350 | for (;;) |
5351 | { | |
5352 | m = gfc_match_name (name); | |
5353 | if (m == MATCH_NO) | |
5354 | goto syntax; | |
5355 | if (m != MATCH_YES) | |
5356 | return MATCH_ERROR; | |
5357 | ||
060fca4a | 5358 | if (gfc_get_symbol (name, module_ns, &sym)) |
6de9cd9a DN |
5359 | return MATCH_ERROR; |
5360 | ||
5361 | if (sym->attr.proc != PROC_MODULE | |
231b2fcc TS |
5362 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
5363 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
5364 | return MATCH_ERROR; |
5365 | ||
5366 | if (gfc_add_interface (sym) == FAILURE) | |
5367 | return MATCH_ERROR; | |
5368 | ||
71f77fd7 PT |
5369 | sym->attr.mod_proc = 1; |
5370 | ||
6de9cd9a DN |
5371 | if (gfc_match_eos () == MATCH_YES) |
5372 | break; | |
5373 | if (gfc_match_char (',') != MATCH_YES) | |
5374 | goto syntax; | |
5375 | } | |
5376 | ||
5377 | return MATCH_YES; | |
5378 | ||
5379 | syntax: | |
5380 | gfc_syntax_error (ST_MODULE_PROC); | |
5381 | return MATCH_ERROR; | |
5382 | } | |
5383 | ||
5384 | ||
a8b3b0b6 CR |
5385 | /* Match the optional attribute specifiers for a type declaration. |
5386 | Return MATCH_ERROR if an error is encountered in one of the handled | |
5387 | attributes (public, private, bind(c)), MATCH_NO if what's found is | |
5388 | not a handled attribute, and MATCH_YES otherwise. TODO: More error | |
5389 | checking on attribute conflicts needs to be done. */ | |
6de9cd9a DN |
5390 | |
5391 | match | |
a8b3b0b6 | 5392 | gfc_get_type_attr_spec (symbol_attribute *attr) |
6de9cd9a | 5393 | { |
a8b3b0b6 | 5394 | /* See if the derived type is marked as private. */ |
6de9cd9a DN |
5395 | if (gfc_match (" , private") == MATCH_YES) |
5396 | { | |
d51347f9 | 5397 | if (gfc_current_state () != COMP_MODULE) |
6de9cd9a | 5398 | { |
d51347f9 TB |
5399 | gfc_error ("Derived type at %C can only be PRIVATE in the " |
5400 | "specification part of a module"); | |
6de9cd9a DN |
5401 | return MATCH_ERROR; |
5402 | } | |
5403 | ||
a8b3b0b6 | 5404 | if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
6de9cd9a | 5405 | return MATCH_ERROR; |
6de9cd9a | 5406 | } |
a8b3b0b6 | 5407 | else if (gfc_match (" , public") == MATCH_YES) |
6de9cd9a | 5408 | { |
d51347f9 | 5409 | if (gfc_current_state () != COMP_MODULE) |
6de9cd9a | 5410 | { |
d51347f9 TB |
5411 | gfc_error ("Derived type at %C can only be PUBLIC in the " |
5412 | "specification part of a module"); | |
6de9cd9a DN |
5413 | return MATCH_ERROR; |
5414 | } | |
5415 | ||
a8b3b0b6 | 5416 | if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
6de9cd9a | 5417 | return MATCH_ERROR; |
6de9cd9a | 5418 | } |
e7303e85 | 5419 | else if (gfc_match(" , bind ( c )") == MATCH_YES) |
a8b3b0b6 CR |
5420 | { |
5421 | /* If the type is defined to be bind(c) it then needs to make | |
5422 | sure that all fields are interoperable. This will | |
5423 | need to be a semantic check on the finished derived type. | |
5424 | See 15.2.3 (lines 9-12) of F2003 draft. */ | |
5425 | if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) | |
5426 | return MATCH_ERROR; | |
5427 | ||
5428 | /* TODO: attr conflicts need to be checked, probably in symbol.c. */ | |
5429 | } | |
5430 | else | |
5431 | return MATCH_NO; | |
5432 | ||
5433 | /* If we get here, something matched. */ | |
5434 | return MATCH_YES; | |
5435 | } | |
5436 | ||
5437 | ||
5438 | /* Match the beginning of a derived type declaration. If a type name | |
5439 | was the result of a function, then it is possible to have a symbol | |
5440 | already to be known as a derived type yet have no components. */ | |
5441 | ||
5442 | match | |
5443 | gfc_match_derived_decl (void) | |
5444 | { | |
5445 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5446 | symbol_attribute attr; | |
5447 | gfc_symbol *sym; | |
5448 | match m; | |
5449 | match is_type_attr_spec = MATCH_NO; | |
e7303e85 | 5450 | bool seen_attr = false; |
a8b3b0b6 CR |
5451 | |
5452 | if (gfc_current_state () == COMP_DERIVED) | |
5453 | return MATCH_NO; | |
5454 | ||
5455 | gfc_clear_attr (&attr); | |
5456 | ||
5457 | do | |
5458 | { | |
5459 | is_type_attr_spec = gfc_get_type_attr_spec (&attr); | |
5460 | if (is_type_attr_spec == MATCH_ERROR) | |
5461 | return MATCH_ERROR; | |
e7303e85 FXC |
5462 | if (is_type_attr_spec == MATCH_YES) |
5463 | seen_attr = true; | |
a8b3b0b6 | 5464 | } while (is_type_attr_spec == MATCH_YES); |
6de9cd9a | 5465 | |
e7303e85 | 5466 | if (gfc_match (" ::") != MATCH_YES && seen_attr) |
6de9cd9a DN |
5467 | { |
5468 | gfc_error ("Expected :: in TYPE definition at %C"); | |
5469 | return MATCH_ERROR; | |
5470 | } | |
5471 | ||
5472 | m = gfc_match (" %n%t", name); | |
5473 | if (m != MATCH_YES) | |
5474 | return m; | |
5475 | ||
e9c06563 TB |
5476 | /* Make sure the name is not the name of an intrinsic type. */ |
5477 | if (gfc_is_intrinsic_typename (name)) | |
6de9cd9a | 5478 | { |
636dff67 SK |
5479 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
5480 | "type", name); | |
6de9cd9a DN |
5481 | return MATCH_ERROR; |
5482 | } | |
5483 | ||
5484 | if (gfc_get_symbol (name, NULL, &sym)) | |
5485 | return MATCH_ERROR; | |
5486 | ||
5487 | if (sym->ts.type != BT_UNKNOWN) | |
5488 | { | |
5489 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
5490 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
5491 | return MATCH_ERROR; | |
5492 | } | |
5493 | ||
5494 | /* The symbol may already have the derived attribute without the | |
5495 | components. The ways this can happen is via a function | |
5496 | definition, an INTRINSIC statement or a subtype in another | |
5497 | derived type that is a pointer. The first part of the AND clause | |
f7b529fa | 5498 | is true if a the symbol is not the return value of a function. */ |
6de9cd9a | 5499 | if (sym->attr.flavor != FL_DERIVED |
231b2fcc | 5500 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
5501 | return MATCH_ERROR; |
5502 | ||
5503 | if (sym->components != NULL) | |
5504 | { | |
636dff67 SK |
5505 | gfc_error ("Derived type definition of '%s' at %C has already been " |
5506 | "defined", sym->name); | |
6de9cd9a DN |
5507 | return MATCH_ERROR; |
5508 | } | |
5509 | ||
5510 | if (attr.access != ACCESS_UNKNOWN | |
231b2fcc | 5511 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
5512 | return MATCH_ERROR; |
5513 | ||
a8b3b0b6 CR |
5514 | /* See if the derived type was labeled as bind(c). */ |
5515 | if (attr.is_bind_c != 0) | |
5516 | sym->attr.is_bind_c = attr.is_bind_c; | |
5517 | ||
6de9cd9a DN |
5518 | gfc_new_block = sym; |
5519 | ||
5520 | return MATCH_YES; | |
5521 | } | |
83d890b9 AL |
5522 | |
5523 | ||
5524 | /* Cray Pointees can be declared as: | |
5525 | pointer (ipt, a (n,m,...,*)) | |
5526 | By default, this is treated as an AS_ASSUMED_SIZE array. We'll | |
5527 | cheat and set a constant bound of 1 for the last dimension, if this | |
5528 | is the case. Since there is no bounds-checking for Cray Pointees, | |
5529 | this will be okay. */ | |
5530 | ||
5531 | try | |
5532 | gfc_mod_pointee_as (gfc_array_spec *as) | |
5533 | { | |
5534 | as->cray_pointee = true; /* This will be useful to know later. */ | |
5535 | if (as->type == AS_ASSUMED_SIZE) | |
5536 | { | |
5537 | as->type = AS_EXPLICIT; | |
5538 | as->upper[as->rank - 1] = gfc_int_expr (1); | |
5539 | as->cp_was_assumed = true; | |
5540 | } | |
5541 | else if (as->type == AS_ASSUMED_SHAPE) | |
5542 | { | |
5543 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
5544 | return MATCH_ERROR; | |
5545 | } | |
5546 | return MATCH_YES; | |
5547 | } | |
25d8f0a2 TS |
5548 | |
5549 | ||
5550 | /* Match the enum definition statement, here we are trying to match | |
5551 | the first line of enum definition statement. | |
5552 | Returns MATCH_YES if match is found. */ | |
5553 | ||
5554 | match | |
5555 | gfc_match_enum (void) | |
5556 | { | |
5557 | match m; | |
5558 | ||
5559 | m = gfc_match_eos (); | |
5560 | if (m != MATCH_YES) | |
5561 | return m; | |
5562 | ||
6133c68a | 5563 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") |
25d8f0a2 TS |
5564 | == FAILURE) |
5565 | return MATCH_ERROR; | |
5566 | ||
5567 | return MATCH_YES; | |
5568 | } | |
5569 | ||
5570 | ||
6133c68a TS |
5571 | /* Match a variable name with an optional initializer. When this |
5572 | subroutine is called, a variable is expected to be parsed next. | |
5573 | Depending on what is happening at the moment, updates either the | |
5574 | symbol table or the current interface. */ | |
5575 | ||
5576 | static match | |
5577 | enumerator_decl (void) | |
5578 | { | |
5579 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5580 | gfc_expr *initializer; | |
5581 | gfc_array_spec *as = NULL; | |
5582 | gfc_symbol *sym; | |
5583 | locus var_locus; | |
5584 | match m; | |
5585 | try t; | |
5586 | locus old_locus; | |
5587 | ||
5588 | initializer = NULL; | |
5589 | old_locus = gfc_current_locus; | |
5590 | ||
5591 | /* When we get here, we've just matched a list of attributes and | |
5592 | maybe a type and a double colon. The next thing we expect to see | |
5593 | is the name of the symbol. */ | |
5594 | m = gfc_match_name (name); | |
5595 | if (m != MATCH_YES) | |
5596 | goto cleanup; | |
5597 | ||
5598 | var_locus = gfc_current_locus; | |
5599 | ||
5600 | /* OK, we've successfully matched the declaration. Now put the | |
5601 | symbol in the current namespace. If we fail to create the symbol, | |
5602 | bail out. */ | |
5603 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
5604 | { | |
5605 | m = MATCH_ERROR; | |
5606 | goto cleanup; | |
5607 | } | |
5608 | ||
5609 | /* The double colon must be present in order to have initializers. | |
5610 | Otherwise the statement is ambiguous with an assignment statement. */ | |
5611 | if (colon_seen) | |
5612 | { | |
5613 | if (gfc_match_char ('=') == MATCH_YES) | |
5614 | { | |
5615 | m = gfc_match_init_expr (&initializer); | |
5616 | if (m == MATCH_NO) | |
5617 | { | |
5618 | gfc_error ("Expected an initialization expression at %C"); | |
5619 | m = MATCH_ERROR; | |
5620 | } | |
5621 | ||
5622 | if (m != MATCH_YES) | |
5623 | goto cleanup; | |
5624 | } | |
5625 | } | |
5626 | ||
5627 | /* If we do not have an initializer, the initialization value of the | |
5628 | previous enumerator (stored in last_initializer) is incremented | |
5629 | by 1 and is used to initialize the current enumerator. */ | |
5630 | if (initializer == NULL) | |
5631 | initializer = gfc_enum_initializer (last_initializer, old_locus); | |
d51347f9 | 5632 | |
6133c68a TS |
5633 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
5634 | { | |
5635 | gfc_error("ENUMERATOR %L not initialized with integer expression", | |
5636 | &var_locus); | |
d51347f9 | 5637 | m = MATCH_ERROR; |
6133c68a TS |
5638 | gfc_free_enum_history (); |
5639 | goto cleanup; | |
5640 | } | |
5641 | ||
5642 | /* Store this current initializer, for the next enumerator variable | |
5643 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
5644 | use last_initializer below. */ | |
5645 | last_initializer = initializer; | |
5646 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
5647 | ||
5648 | /* Maintain enumerator history. */ | |
5649 | gfc_find_symbol (name, NULL, 0, &sym); | |
5650 | create_enum_history (sym, last_initializer); | |
5651 | ||
5652 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
5653 | ||
5654 | cleanup: | |
5655 | /* Free stuff up and return. */ | |
5656 | gfc_free_expr (initializer); | |
5657 | ||
5658 | return m; | |
5659 | } | |
5660 | ||
5661 | ||
66e4ab31 | 5662 | /* Match the enumerator definition statement. */ |
25d8f0a2 TS |
5663 | |
5664 | match | |
5665 | gfc_match_enumerator_def (void) | |
5666 | { | |
5667 | match m; | |
6133c68a | 5668 | try t; |
d51347f9 | 5669 | |
25d8f0a2 | 5670 | gfc_clear_ts (¤t_ts); |
d51347f9 | 5671 | |
25d8f0a2 TS |
5672 | m = gfc_match (" enumerator"); |
5673 | if (m != MATCH_YES) | |
5674 | return m; | |
6133c68a TS |
5675 | |
5676 | m = gfc_match (" :: "); | |
5677 | if (m == MATCH_ERROR) | |
5678 | return m; | |
5679 | ||
5680 | colon_seen = (m == MATCH_YES); | |
d51347f9 | 5681 | |
25d8f0a2 TS |
5682 | if (gfc_current_state () != COMP_ENUM) |
5683 | { | |
5684 | gfc_error ("ENUM definition statement expected before %C"); | |
5685 | gfc_free_enum_history (); | |
5686 | return MATCH_ERROR; | |
5687 | } | |
5688 | ||
5689 | (¤t_ts)->type = BT_INTEGER; | |
5690 | (¤t_ts)->kind = gfc_c_int_kind; | |
d51347f9 | 5691 | |
6133c68a TS |
5692 | gfc_clear_attr (¤t_attr); |
5693 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
5694 | if (t == FAILURE) | |
25d8f0a2 | 5695 | { |
6133c68a | 5696 | m = MATCH_ERROR; |
25d8f0a2 TS |
5697 | goto cleanup; |
5698 | } | |
5699 | ||
25d8f0a2 TS |
5700 | for (;;) |
5701 | { | |
6133c68a | 5702 | m = enumerator_decl (); |
25d8f0a2 TS |
5703 | if (m == MATCH_ERROR) |
5704 | goto cleanup; | |
5705 | if (m == MATCH_NO) | |
5706 | break; | |
5707 | ||
5708 | if (gfc_match_eos () == MATCH_YES) | |
5709 | goto cleanup; | |
5710 | if (gfc_match_char (',') != MATCH_YES) | |
5711 | break; | |
5712 | } | |
5713 | ||
5714 | if (gfc_current_state () == COMP_ENUM) | |
5715 | { | |
5716 | gfc_free_enum_history (); | |
5717 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
5718 | m = MATCH_ERROR; | |
5719 | } | |
5720 | ||
5721 | cleanup: | |
5722 | gfc_free_array_spec (current_as); | |
5723 | current_as = NULL; | |
5724 | return m; | |
5725 | ||
5726 | } | |
5727 |