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4ee9c684 | 1 | /* Declaration statement matcher |
0305ad9b | 2 | Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc. |
4ee9c684 | 3 | Contributed by Andy Vaught |
4 | ||
c84b470d | 5 | This file is part of GCC. |
4ee9c684 | 6 | |
c84b470d | 7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 2, or (at your option) any later | |
10 | version. | |
4ee9c684 | 11 | |
c84b470d | 12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
4ee9c684 | 16 | |
17 | You should have received a copy of the GNU General Public License | |
c84b470d | 18 | along with GCC; see the file COPYING. If not, write to the Free |
30d4ffea | 19 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
20 | 02110-1301, USA. */ | |
4ee9c684 | 21 | |
22 | ||
23 | #include "config.h" | |
7436502b | 24 | #include "system.h" |
4ee9c684 | 25 | #include "gfortran.h" |
26 | #include "match.h" | |
27 | #include "parse.h" | |
4ee9c684 | 28 | |
29 | ||
36ae04f2 | 30 | /* This flag is set if an old-style length selector is matched |
4ee9c684 | 31 | during a type-declaration statement. */ |
32 | ||
33 | static int old_char_selector; | |
34 | ||
5739e54e | 35 | /* When variables acquire types and attributes from a declaration |
4ee9c684 | 36 | statement, they get them from the following static variables. The |
37 | first part of a declaration sets these variables and the second | |
38 | part copies these into symbol structures. */ | |
39 | ||
40 | static gfc_typespec current_ts; | |
41 | ||
42 | static symbol_attribute current_attr; | |
43 | static gfc_array_spec *current_as; | |
44 | static int colon_seen; | |
45 | ||
46 | /* gfc_new_block points to the symbol of a newly matched block. */ | |
47 | ||
48 | gfc_symbol *gfc_new_block; | |
49 | ||
50 | ||
b4f45d02 | 51 | /********************* DATA statement subroutines *********************/ |
52 | ||
53 | /* Free a gfc_data_variable structure and everything beneath it. */ | |
54 | ||
55 | static void | |
56 | free_variable (gfc_data_variable * p) | |
57 | { | |
58 | gfc_data_variable *q; | |
59 | ||
60 | for (; p; p = q) | |
61 | { | |
62 | q = p->next; | |
63 | gfc_free_expr (p->expr); | |
64 | gfc_free_iterator (&p->iter, 0); | |
65 | free_variable (p->list); | |
66 | ||
67 | gfc_free (p); | |
68 | } | |
69 | } | |
70 | ||
71 | ||
72 | /* Free a gfc_data_value structure and everything beneath it. */ | |
73 | ||
74 | static void | |
75 | free_value (gfc_data_value * p) | |
76 | { | |
77 | gfc_data_value *q; | |
78 | ||
79 | for (; p; p = q) | |
80 | { | |
81 | q = p->next; | |
82 | gfc_free_expr (p->expr); | |
83 | gfc_free (p); | |
84 | } | |
85 | } | |
86 | ||
87 | ||
88 | /* Free a list of gfc_data structures. */ | |
89 | ||
90 | void | |
91 | gfc_free_data (gfc_data * p) | |
92 | { | |
93 | gfc_data *q; | |
94 | ||
95 | for (; p; p = q) | |
96 | { | |
97 | q = p->next; | |
98 | ||
99 | free_variable (p->var); | |
100 | free_value (p->value); | |
101 | ||
102 | gfc_free (p); | |
103 | } | |
104 | } | |
105 | ||
106 | ||
107 | static match var_element (gfc_data_variable *); | |
108 | ||
109 | /* Match a list of variables terminated by an iterator and a right | |
110 | parenthesis. */ | |
111 | ||
112 | static match | |
113 | var_list (gfc_data_variable * parent) | |
114 | { | |
115 | gfc_data_variable *tail, var; | |
116 | match m; | |
117 | ||
118 | m = var_element (&var); | |
119 | if (m == MATCH_ERROR) | |
120 | return MATCH_ERROR; | |
121 | if (m == MATCH_NO) | |
122 | goto syntax; | |
123 | ||
124 | tail = gfc_get_data_variable (); | |
125 | *tail = var; | |
126 | ||
127 | parent->list = tail; | |
128 | ||
129 | for (;;) | |
130 | { | |
131 | if (gfc_match_char (',') != MATCH_YES) | |
132 | goto syntax; | |
133 | ||
134 | m = gfc_match_iterator (&parent->iter, 1); | |
135 | if (m == MATCH_YES) | |
136 | break; | |
137 | if (m == MATCH_ERROR) | |
138 | return MATCH_ERROR; | |
139 | ||
140 | m = var_element (&var); | |
141 | if (m == MATCH_ERROR) | |
142 | return MATCH_ERROR; | |
143 | if (m == MATCH_NO) | |
144 | goto syntax; | |
145 | ||
146 | tail->next = gfc_get_data_variable (); | |
147 | tail = tail->next; | |
148 | ||
149 | *tail = var; | |
150 | } | |
151 | ||
152 | if (gfc_match_char (')') != MATCH_YES) | |
153 | goto syntax; | |
154 | return MATCH_YES; | |
155 | ||
156 | syntax: | |
157 | gfc_syntax_error (ST_DATA); | |
158 | return MATCH_ERROR; | |
159 | } | |
160 | ||
161 | ||
162 | /* Match a single element in a data variable list, which can be a | |
163 | variable-iterator list. */ | |
164 | ||
165 | static match | |
166 | var_element (gfc_data_variable * new) | |
167 | { | |
168 | match m; | |
169 | gfc_symbol *sym; | |
170 | ||
171 | memset (new, 0, sizeof (gfc_data_variable)); | |
172 | ||
173 | if (gfc_match_char ('(') == MATCH_YES) | |
174 | return var_list (new); | |
175 | ||
176 | m = gfc_match_variable (&new->expr, 0); | |
177 | if (m != MATCH_YES) | |
178 | return m; | |
179 | ||
180 | sym = new->expr->symtree->n.sym; | |
181 | ||
182 | if(sym->value != NULL) | |
183 | { | |
184 | gfc_error ("Variable '%s' at %C already has an initialization", | |
185 | sym->name); | |
186 | return MATCH_ERROR; | |
187 | } | |
188 | ||
be63aff0 | 189 | #if 0 /* TODO: Find out where to move this message */ |
b4f45d02 | 190 | if (sym->attr.in_common) |
191 | /* See if sym is in the blank common block. */ | |
192 | for (t = &sym->ns->blank_common; t; t = t->common_next) | |
193 | if (sym == t->head) | |
194 | { | |
195 | gfc_error ("DATA statement at %C may not initialize variable " | |
196 | "'%s' from blank COMMON", sym->name); | |
197 | return MATCH_ERROR; | |
198 | } | |
199 | #endif | |
200 | ||
950683ed | 201 | if (gfc_add_data (&sym->attr, sym->name, &new->expr->where) == FAILURE) |
b4f45d02 | 202 | return MATCH_ERROR; |
203 | ||
204 | return MATCH_YES; | |
205 | } | |
206 | ||
207 | ||
208 | /* Match the top-level list of data variables. */ | |
209 | ||
210 | static match | |
211 | top_var_list (gfc_data * d) | |
212 | { | |
213 | gfc_data_variable var, *tail, *new; | |
214 | match m; | |
215 | ||
216 | tail = NULL; | |
217 | ||
218 | for (;;) | |
219 | { | |
220 | m = var_element (&var); | |
221 | if (m == MATCH_NO) | |
222 | goto syntax; | |
223 | if (m == MATCH_ERROR) | |
224 | return MATCH_ERROR; | |
225 | ||
226 | new = gfc_get_data_variable (); | |
227 | *new = var; | |
228 | ||
229 | if (tail == NULL) | |
230 | d->var = new; | |
231 | else | |
232 | tail->next = new; | |
233 | ||
234 | tail = new; | |
235 | ||
236 | if (gfc_match_char ('/') == MATCH_YES) | |
237 | break; | |
238 | if (gfc_match_char (',') != MATCH_YES) | |
239 | goto syntax; | |
240 | } | |
241 | ||
242 | return MATCH_YES; | |
243 | ||
244 | syntax: | |
245 | gfc_syntax_error (ST_DATA); | |
246 | return MATCH_ERROR; | |
247 | } | |
248 | ||
249 | ||
250 | static match | |
251 | match_data_constant (gfc_expr ** result) | |
252 | { | |
253 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
254 | gfc_symbol *sym; | |
255 | gfc_expr *expr; | |
256 | match m; | |
257 | ||
258 | m = gfc_match_literal_constant (&expr, 1); | |
259 | if (m == MATCH_YES) | |
260 | { | |
261 | *result = expr; | |
262 | return MATCH_YES; | |
263 | } | |
264 | ||
265 | if (m == MATCH_ERROR) | |
266 | return MATCH_ERROR; | |
267 | ||
268 | m = gfc_match_null (result); | |
269 | if (m != MATCH_NO) | |
270 | return m; | |
271 | ||
272 | m = gfc_match_name (name); | |
273 | if (m != MATCH_YES) | |
274 | return m; | |
275 | ||
276 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
277 | return MATCH_ERROR; | |
278 | ||
279 | if (sym == NULL | |
280 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
281 | { | |
282 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
283 | name); | |
284 | return MATCH_ERROR; | |
285 | } | |
286 | else if (sym->attr.flavor == FL_DERIVED) | |
287 | return gfc_match_structure_constructor (sym, result); | |
288 | ||
289 | *result = gfc_copy_expr (sym->value); | |
290 | return MATCH_YES; | |
291 | } | |
292 | ||
293 | ||
294 | /* Match a list of values in a DATA statement. The leading '/' has | |
295 | already been seen at this point. */ | |
296 | ||
297 | static match | |
298 | top_val_list (gfc_data * data) | |
299 | { | |
300 | gfc_data_value *new, *tail; | |
301 | gfc_expr *expr; | |
302 | const char *msg; | |
303 | match m; | |
304 | ||
305 | tail = NULL; | |
306 | ||
307 | for (;;) | |
308 | { | |
309 | m = match_data_constant (&expr); | |
310 | if (m == MATCH_NO) | |
311 | goto syntax; | |
312 | if (m == MATCH_ERROR) | |
313 | return MATCH_ERROR; | |
314 | ||
315 | new = gfc_get_data_value (); | |
316 | ||
317 | if (tail == NULL) | |
318 | data->value = new; | |
319 | else | |
320 | tail->next = new; | |
321 | ||
322 | tail = new; | |
323 | ||
324 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
325 | { | |
326 | tail->expr = expr; | |
327 | tail->repeat = 1; | |
328 | } | |
329 | else | |
330 | { | |
331 | signed int tmp; | |
332 | msg = gfc_extract_int (expr, &tmp); | |
333 | gfc_free_expr (expr); | |
334 | if (msg != NULL) | |
335 | { | |
336 | gfc_error (msg); | |
337 | return MATCH_ERROR; | |
338 | } | |
339 | tail->repeat = tmp; | |
340 | ||
341 | m = match_data_constant (&tail->expr); | |
342 | if (m == MATCH_NO) | |
343 | goto syntax; | |
344 | if (m == MATCH_ERROR) | |
345 | return MATCH_ERROR; | |
346 | } | |
347 | ||
348 | if (gfc_match_char ('/') == MATCH_YES) | |
349 | break; | |
350 | if (gfc_match_char (',') == MATCH_NO) | |
351 | goto syntax; | |
352 | } | |
353 | ||
354 | return MATCH_YES; | |
355 | ||
356 | syntax: | |
357 | gfc_syntax_error (ST_DATA); | |
358 | return MATCH_ERROR; | |
359 | } | |
360 | ||
361 | ||
362 | /* Matches an old style initialization. */ | |
363 | ||
364 | static match | |
365 | match_old_style_init (const char *name) | |
366 | { | |
367 | match m; | |
368 | gfc_symtree *st; | |
369 | gfc_data *newdata; | |
370 | ||
371 | /* Set up data structure to hold initializers. */ | |
372 | gfc_find_sym_tree (name, NULL, 0, &st); | |
373 | ||
374 | newdata = gfc_get_data (); | |
375 | newdata->var = gfc_get_data_variable (); | |
376 | newdata->var->expr = gfc_get_variable_expr (st); | |
377 | ||
378 | /* Match initial value list. This also eats the terminal | |
379 | '/'. */ | |
380 | m = top_val_list (newdata); | |
381 | if (m != MATCH_YES) | |
382 | { | |
383 | gfc_free (newdata); | |
384 | return m; | |
385 | } | |
386 | ||
387 | if (gfc_pure (NULL)) | |
388 | { | |
389 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
390 | gfc_free (newdata); | |
391 | return MATCH_ERROR; | |
392 | } | |
393 | ||
394 | /* Chain in namespace list of DATA initializers. */ | |
395 | newdata->next = gfc_current_ns->data; | |
396 | gfc_current_ns->data = newdata; | |
397 | ||
398 | return m; | |
399 | } | |
400 | ||
401 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, | |
39fca56b | 402 | we are matching a DATA statement and are therefore issuing an error |
b4f45d02 | 403 | if we encounter something unexpected, if not, we're trying to match |
fe06c0d5 | 404 | an old-style initialization expression of the form INTEGER I /2/. */ |
b4f45d02 | 405 | |
406 | match | |
407 | gfc_match_data (void) | |
408 | { | |
409 | gfc_data *new; | |
410 | match m; | |
411 | ||
412 | for (;;) | |
413 | { | |
414 | new = gfc_get_data (); | |
415 | new->where = gfc_current_locus; | |
416 | ||
417 | m = top_var_list (new); | |
418 | if (m != MATCH_YES) | |
419 | goto cleanup; | |
420 | ||
421 | m = top_val_list (new); | |
422 | if (m != MATCH_YES) | |
423 | goto cleanup; | |
424 | ||
425 | new->next = gfc_current_ns->data; | |
426 | gfc_current_ns->data = new; | |
427 | ||
428 | if (gfc_match_eos () == MATCH_YES) | |
429 | break; | |
430 | ||
431 | gfc_match_char (','); /* Optional comma */ | |
432 | } | |
433 | ||
434 | if (gfc_pure (NULL)) | |
435 | { | |
436 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
437 | return MATCH_ERROR; | |
438 | } | |
439 | ||
440 | return MATCH_YES; | |
441 | ||
442 | cleanup: | |
443 | gfc_free_data (new); | |
444 | return MATCH_ERROR; | |
445 | } | |
446 | ||
447 | ||
448 | /************************ Declaration statements *********************/ | |
449 | ||
4ee9c684 | 450 | /* Match an intent specification. Since this can only happen after an |
451 | INTENT word, a legal intent-spec must follow. */ | |
452 | ||
453 | static sym_intent | |
454 | match_intent_spec (void) | |
455 | { | |
456 | ||
457 | if (gfc_match (" ( in out )") == MATCH_YES) | |
458 | return INTENT_INOUT; | |
459 | if (gfc_match (" ( in )") == MATCH_YES) | |
460 | return INTENT_IN; | |
461 | if (gfc_match (" ( out )") == MATCH_YES) | |
462 | return INTENT_OUT; | |
463 | ||
464 | gfc_error ("Bad INTENT specification at %C"); | |
465 | return INTENT_UNKNOWN; | |
466 | } | |
467 | ||
468 | ||
469 | /* Matches a character length specification, which is either a | |
470 | specification expression or a '*'. */ | |
471 | ||
472 | static match | |
473 | char_len_param_value (gfc_expr ** expr) | |
474 | { | |
475 | ||
476 | if (gfc_match_char ('*') == MATCH_YES) | |
477 | { | |
478 | *expr = NULL; | |
479 | return MATCH_YES; | |
480 | } | |
481 | ||
482 | return gfc_match_expr (expr); | |
483 | } | |
484 | ||
485 | ||
486 | /* A character length is a '*' followed by a literal integer or a | |
487 | char_len_param_value in parenthesis. */ | |
488 | ||
489 | static match | |
490 | match_char_length (gfc_expr ** expr) | |
491 | { | |
492 | int length; | |
493 | match m; | |
494 | ||
495 | m = gfc_match_char ('*'); | |
496 | if (m != MATCH_YES) | |
497 | return m; | |
498 | ||
499 | m = gfc_match_small_literal_int (&length); | |
500 | if (m == MATCH_ERROR) | |
501 | return m; | |
502 | ||
503 | if (m == MATCH_YES) | |
504 | { | |
505 | *expr = gfc_int_expr (length); | |
506 | return m; | |
507 | } | |
508 | ||
509 | if (gfc_match_char ('(') == MATCH_NO) | |
510 | goto syntax; | |
511 | ||
512 | m = char_len_param_value (expr); | |
513 | if (m == MATCH_ERROR) | |
514 | return m; | |
515 | if (m == MATCH_NO) | |
516 | goto syntax; | |
517 | ||
518 | if (gfc_match_char (')') == MATCH_NO) | |
519 | { | |
520 | gfc_free_expr (*expr); | |
521 | *expr = NULL; | |
522 | goto syntax; | |
523 | } | |
524 | ||
525 | return MATCH_YES; | |
526 | ||
527 | syntax: | |
528 | gfc_error ("Syntax error in character length specification at %C"); | |
529 | return MATCH_ERROR; | |
530 | } | |
531 | ||
532 | ||
ee893be6 | 533 | /* Special subroutine for finding a symbol. Check if the name is found |
534 | in the current name space. If not, and we're compiling a function or | |
535 | subroutine and the parent compilation unit is an interface, then check | |
536 | to see if the name we've been given is the name of the interface | |
537 | (located in another namespace). */ | |
4ee9c684 | 538 | |
539 | static int | |
540 | find_special (const char *name, gfc_symbol ** result) | |
541 | { | |
542 | gfc_state_data *s; | |
ee893be6 | 543 | int i; |
4ee9c684 | 544 | |
ee893be6 | 545 | i = gfc_get_symbol (name, NULL, result); |
546 | if (i==0) | |
547 | goto end; | |
548 | ||
4ee9c684 | 549 | if (gfc_current_state () != COMP_SUBROUTINE |
550 | && gfc_current_state () != COMP_FUNCTION) | |
ee893be6 | 551 | goto end; |
4ee9c684 | 552 | |
553 | s = gfc_state_stack->previous; | |
554 | if (s == NULL) | |
ee893be6 | 555 | goto end; |
4ee9c684 | 556 | |
557 | if (s->state != COMP_INTERFACE) | |
ee893be6 | 558 | goto end; |
4ee9c684 | 559 | if (s->sym == NULL) |
ee893be6 | 560 | goto end; /* Nameless interface */ |
4ee9c684 | 561 | |
562 | if (strcmp (name, s->sym->name) == 0) | |
563 | { | |
564 | *result = s->sym; | |
565 | return 0; | |
566 | } | |
567 | ||
ee893be6 | 568 | end: |
569 | return i; | |
4ee9c684 | 570 | } |
571 | ||
572 | ||
573 | /* Special subroutine for getting a symbol node associated with a | |
574 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
575 | symbol is created in the parent using with symtree node in the | |
576 | child unit pointing to the symbol. If the current namespace has no | |
577 | parent, then the symbol is just created in the current unit. */ | |
578 | ||
579 | static int | |
580 | get_proc_name (const char *name, gfc_symbol ** result) | |
581 | { | |
582 | gfc_symtree *st; | |
583 | gfc_symbol *sym; | |
584 | int rc; | |
585 | ||
586 | if (gfc_current_ns->parent == NULL) | |
587 | return gfc_get_symbol (name, NULL, result); | |
588 | ||
589 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
590 | if (*result == NULL) | |
591 | return rc; | |
592 | ||
1b716045 | 593 | /* ??? Deal with ENTRY problem */ |
4ee9c684 | 594 | |
595 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
596 | ||
597 | sym = *result; | |
598 | st->n.sym = sym; | |
599 | sym->refs++; | |
600 | ||
601 | /* See if the procedure should be a module procedure */ | |
602 | ||
603 | if (sym->ns->proc_name != NULL | |
604 | && sym->ns->proc_name->attr.flavor == FL_MODULE | |
605 | && sym->attr.proc != PROC_MODULE | |
950683ed | 606 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
607 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 608 | rc = 2; |
609 | ||
610 | return rc; | |
611 | } | |
612 | ||
613 | ||
614 | /* Function called by variable_decl() that adds a name to the symbol | |
615 | table. */ | |
616 | ||
617 | static try | |
618 | build_sym (const char *name, gfc_charlen * cl, | |
619 | gfc_array_spec ** as, locus * var_locus) | |
620 | { | |
621 | symbol_attribute attr; | |
622 | gfc_symbol *sym; | |
623 | ||
ee893be6 | 624 | /* if (find_special (name, &sym)) */ |
625 | if (gfc_get_symbol (name, NULL, &sym)) | |
4ee9c684 | 626 | return FAILURE; |
627 | ||
628 | /* Start updating the symbol table. Add basic type attribute | |
629 | if present. */ | |
630 | if (current_ts.type != BT_UNKNOWN | |
631 | &&(sym->attr.implicit_type == 0 | |
632 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
633 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) | |
634 | return FAILURE; | |
635 | ||
636 | if (sym->ts.type == BT_CHARACTER) | |
637 | sym->ts.cl = cl; | |
638 | ||
639 | /* Add dimension attribute if present. */ | |
640 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
641 | return FAILURE; | |
642 | *as = NULL; | |
643 | ||
644 | /* Add attribute to symbol. The copy is so that we can reset the | |
645 | dimension attribute. */ | |
646 | attr = current_attr; | |
647 | attr.dimension = 0; | |
648 | ||
649 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
650 | return FAILURE; | |
651 | ||
652 | return SUCCESS; | |
653 | } | |
654 | ||
a270dc8e | 655 | /* Set character constant to the given length. The constant will be padded or |
656 | truncated. */ | |
657 | ||
658 | void | |
659 | gfc_set_constant_character_len (int len, gfc_expr * expr) | |
660 | { | |
661 | char * s; | |
662 | int slen; | |
663 | ||
664 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
665 | gcc_assert (expr->ts.type == BT_CHARACTER && expr->ts.kind == 1); | |
666 | ||
667 | slen = expr->value.character.length; | |
668 | if (len != slen) | |
669 | { | |
670 | s = gfc_getmem (len); | |
671 | memcpy (s, expr->value.character.string, MIN (len, slen)); | |
672 | if (len > slen) | |
673 | memset (&s[slen], ' ', len - slen); | |
674 | gfc_free (expr->value.character.string); | |
675 | expr->value.character.string = s; | |
676 | expr->value.character.length = len; | |
677 | } | |
678 | } | |
4ee9c684 | 679 | |
680 | /* Function called by variable_decl() that adds an initialization | |
681 | expression to a symbol. */ | |
682 | ||
683 | static try | |
684 | add_init_expr_to_sym (const char *name, gfc_expr ** initp, | |
685 | locus * var_locus) | |
686 | { | |
687 | symbol_attribute attr; | |
688 | gfc_symbol *sym; | |
689 | gfc_expr *init; | |
690 | ||
691 | init = *initp; | |
692 | if (find_special (name, &sym)) | |
693 | return FAILURE; | |
694 | ||
695 | attr = sym->attr; | |
696 | ||
697 | /* If this symbol is confirming an implicit parameter type, | |
698 | then an initialization expression is not allowed. */ | |
699 | if (attr.flavor == FL_PARAMETER | |
700 | && sym->value != NULL | |
701 | && *initp != NULL) | |
702 | { | |
703 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
704 | sym->name); | |
705 | return FAILURE; | |
706 | } | |
707 | ||
6cbc841e | 708 | if (attr.in_common |
709 | && !attr.data | |
710 | && *initp != NULL) | |
711 | { | |
712 | gfc_error ("Initializer not allowed for COMMON variable '%s' at %C", | |
713 | sym->name); | |
714 | return FAILURE; | |
715 | } | |
716 | ||
4ee9c684 | 717 | if (init == NULL) |
718 | { | |
719 | /* An initializer is required for PARAMETER declarations. */ | |
720 | if (attr.flavor == FL_PARAMETER) | |
721 | { | |
722 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
723 | return FAILURE; | |
724 | } | |
725 | } | |
726 | else | |
727 | { | |
728 | /* If a variable appears in a DATA block, it cannot have an | |
b97f1a18 | 729 | initializer. */ |
4ee9c684 | 730 | if (sym->attr.data) |
731 | { | |
732 | gfc_error | |
733 | ("Variable '%s' at %C with an initializer already appears " | |
734 | "in a DATA statement", sym->name); | |
735 | return FAILURE; | |
736 | } | |
737 | ||
cca3db55 | 738 | /* Check if the assignment can happen. This has to be put off |
739 | until later for a derived type variable. */ | |
4ee9c684 | 740 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
741 | && gfc_check_assign_symbol (sym, init) == FAILURE) | |
742 | return FAILURE; | |
743 | ||
a270dc8e | 744 | if (sym->ts.type == BT_CHARACTER && sym->ts.cl) |
745 | { | |
746 | /* Update symbol character length according initializer. */ | |
747 | if (sym->ts.cl->length == NULL) | |
748 | { | |
749 | if (init->expr_type == EXPR_CONSTANT) | |
750 | sym->ts.cl->length = | |
751 | gfc_int_expr (init->value.character.length); | |
752 | else if (init->expr_type == EXPR_ARRAY) | |
753 | sym->ts.cl->length = gfc_copy_expr (init->ts.cl->length); | |
754 | } | |
755 | /* Update initializer character length according symbol. */ | |
756 | else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT) | |
757 | { | |
758 | int len = mpz_get_si (sym->ts.cl->length->value.integer); | |
759 | gfc_constructor * p; | |
760 | ||
761 | if (init->expr_type == EXPR_CONSTANT) | |
762 | gfc_set_constant_character_len (len, init); | |
763 | else if (init->expr_type == EXPR_ARRAY) | |
764 | { | |
765 | gfc_free_expr (init->ts.cl->length); | |
766 | init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length); | |
767 | for (p = init->value.constructor; p; p = p->next) | |
768 | gfc_set_constant_character_len (len, p->expr); | |
769 | } | |
770 | } | |
771 | } | |
772 | ||
4ee9c684 | 773 | /* Add initializer. Make sure we keep the ranks sane. */ |
774 | if (sym->attr.dimension && init->rank == 0) | |
775 | init->rank = sym->as->rank; | |
776 | ||
777 | sym->value = init; | |
778 | *initp = NULL; | |
779 | } | |
780 | ||
781 | return SUCCESS; | |
782 | } | |
783 | ||
784 | ||
785 | /* Function called by variable_decl() that adds a name to a structure | |
786 | being built. */ | |
787 | ||
788 | static try | |
789 | build_struct (const char *name, gfc_charlen * cl, gfc_expr ** init, | |
790 | gfc_array_spec ** as) | |
791 | { | |
792 | gfc_component *c; | |
793 | ||
794 | /* If the current symbol is of the same derived type that we're | |
795 | constructing, it must have the pointer attribute. */ | |
796 | if (current_ts.type == BT_DERIVED | |
797 | && current_ts.derived == gfc_current_block () | |
798 | && current_attr.pointer == 0) | |
799 | { | |
800 | gfc_error ("Component at %C must have the POINTER attribute"); | |
801 | return FAILURE; | |
802 | } | |
803 | ||
804 | if (gfc_current_block ()->attr.pointer | |
805 | && (*as)->rank != 0) | |
806 | { | |
807 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
808 | { | |
809 | gfc_error ("Array component of structure at %C must have explicit " | |
810 | "or deferred shape"); | |
811 | return FAILURE; | |
812 | } | |
813 | } | |
814 | ||
815 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
816 | return FAILURE; | |
817 | ||
818 | c->ts = current_ts; | |
819 | c->ts.cl = cl; | |
820 | gfc_set_component_attr (c, ¤t_attr); | |
821 | ||
822 | c->initializer = *init; | |
823 | *init = NULL; | |
824 | ||
825 | c->as = *as; | |
826 | if (c->as != NULL) | |
827 | c->dimension = 1; | |
828 | *as = NULL; | |
829 | ||
830 | /* Check array components. */ | |
831 | if (!c->dimension) | |
832 | return SUCCESS; | |
833 | ||
834 | if (c->pointer) | |
835 | { | |
836 | if (c->as->type != AS_DEFERRED) | |
837 | { | |
838 | gfc_error ("Pointer array component of structure at %C " | |
839 | "must have a deferred shape"); | |
840 | return FAILURE; | |
841 | } | |
842 | } | |
843 | else | |
844 | { | |
845 | if (c->as->type != AS_EXPLICIT) | |
846 | { | |
847 | gfc_error | |
848 | ("Array component of structure at %C must have an explicit " | |
849 | "shape"); | |
850 | return FAILURE; | |
851 | } | |
852 | } | |
853 | ||
854 | return SUCCESS; | |
855 | } | |
856 | ||
857 | ||
858 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
859 | ||
860 | match | |
861 | gfc_match_null (gfc_expr ** result) | |
862 | { | |
863 | gfc_symbol *sym; | |
864 | gfc_expr *e; | |
865 | match m; | |
866 | ||
867 | m = gfc_match (" null ( )"); | |
868 | if (m != MATCH_YES) | |
869 | return m; | |
870 | ||
871 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
872 | if (gfc_get_symbol ("null", NULL, &sym)) | |
873 | { | |
874 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
875 | return MATCH_ERROR; | |
876 | } | |
877 | ||
878 | gfc_intrinsic_symbol (sym); | |
879 | ||
880 | if (sym->attr.proc != PROC_INTRINSIC | |
950683ed | 881 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
882 | sym->name, NULL) == FAILURE | |
883 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
4ee9c684 | 884 | return MATCH_ERROR; |
885 | ||
886 | e = gfc_get_expr (); | |
cbb9e6aa | 887 | e->where = gfc_current_locus; |
4ee9c684 | 888 | e->expr_type = EXPR_NULL; |
889 | e->ts.type = BT_UNKNOWN; | |
890 | ||
891 | *result = e; | |
892 | ||
893 | return MATCH_YES; | |
894 | } | |
895 | ||
896 | ||
4ee9c684 | 897 | /* Match a variable name with an optional initializer. When this |
898 | subroutine is called, a variable is expected to be parsed next. | |
899 | Depending on what is happening at the moment, updates either the | |
900 | symbol table or the current interface. */ | |
901 | ||
902 | static match | |
903 | variable_decl (void) | |
904 | { | |
905 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
906 | gfc_expr *initializer, *char_len; | |
907 | gfc_array_spec *as; | |
908 | gfc_charlen *cl; | |
909 | locus var_locus; | |
910 | match m; | |
911 | try t; | |
912 | ||
913 | initializer = NULL; | |
914 | as = NULL; | |
915 | ||
916 | /* When we get here, we've just matched a list of attributes and | |
917 | maybe a type and a double colon. The next thing we expect to see | |
918 | is the name of the symbol. */ | |
919 | m = gfc_match_name (name); | |
920 | if (m != MATCH_YES) | |
921 | goto cleanup; | |
922 | ||
cbb9e6aa | 923 | var_locus = gfc_current_locus; |
4ee9c684 | 924 | |
925 | /* Now we could see the optional array spec. or character length. */ | |
926 | m = gfc_match_array_spec (&as); | |
927 | if (m == MATCH_ERROR) | |
928 | goto cleanup; | |
929 | if (m == MATCH_NO) | |
930 | as = gfc_copy_array_spec (current_as); | |
931 | ||
932 | char_len = NULL; | |
933 | cl = NULL; | |
934 | ||
935 | if (current_ts.type == BT_CHARACTER) | |
936 | { | |
937 | switch (match_char_length (&char_len)) | |
938 | { | |
939 | case MATCH_YES: | |
940 | cl = gfc_get_charlen (); | |
941 | cl->next = gfc_current_ns->cl_list; | |
942 | gfc_current_ns->cl_list = cl; | |
943 | ||
944 | cl->length = char_len; | |
945 | break; | |
946 | ||
947 | case MATCH_NO: | |
948 | cl = current_ts.cl; | |
949 | break; | |
950 | ||
951 | case MATCH_ERROR: | |
952 | goto cleanup; | |
953 | } | |
954 | } | |
955 | ||
956 | /* OK, we've successfully matched the declaration. Now put the | |
957 | symbol in the current namespace, because it might be used in the | |
fe06c0d5 | 958 | optional initialization expression for this symbol, e.g. this is |
4ee9c684 | 959 | perfectly legal: |
960 | ||
961 | integer, parameter :: i = huge(i) | |
962 | ||
963 | This is only true for parameters or variables of a basic type. | |
964 | For components of derived types, it is not true, so we don't | |
965 | create a symbol for those yet. If we fail to create the symbol, | |
966 | bail out. */ | |
967 | if (gfc_current_state () != COMP_DERIVED | |
968 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
969 | { | |
970 | m = MATCH_ERROR; | |
971 | goto cleanup; | |
972 | } | |
973 | ||
974 | /* In functions that have a RESULT variable defined, the function | |
975 | name always refers to function calls. Therefore, the name is | |
976 | not allowed to appear in specification statements. */ | |
977 | if (gfc_current_state () == COMP_FUNCTION | |
978 | && gfc_current_block () != NULL | |
979 | && gfc_current_block ()->result != NULL | |
980 | && gfc_current_block ()->result != gfc_current_block () | |
981 | && strcmp (gfc_current_block ()->name, name) == 0) | |
982 | { | |
983 | gfc_error ("Function name '%s' not allowed at %C", name); | |
984 | m = MATCH_ERROR; | |
985 | goto cleanup; | |
986 | } | |
987 | ||
b4f45d02 | 988 | /* We allow old-style initializations of the form |
989 | integer i /2/, j(4) /3*3, 1/ | |
990 | (if no colon has been seen). These are different from data | |
991 | statements in that initializers are only allowed to apply to the | |
992 | variable immediately preceding, i.e. | |
993 | integer i, j /1, 2/ | |
994 | is not allowed. Therefore we have to do some work manually, that | |
cca3db55 | 995 | could otherwise be left to the matchers for DATA statements. */ |
b4f45d02 | 996 | |
997 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
998 | { | |
999 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1000 | "initialization at %C") == FAILURE) | |
1001 | return MATCH_ERROR; | |
1002 | ||
1003 | return match_old_style_init (name); | |
1004 | } | |
1005 | ||
4ee9c684 | 1006 | /* The double colon must be present in order to have initializers. |
1007 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1008 | if (colon_seen) | |
1009 | { | |
1010 | if (gfc_match (" =>") == MATCH_YES) | |
1011 | { | |
1012 | ||
1013 | if (!current_attr.pointer) | |
1014 | { | |
1015 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1016 | m = MATCH_ERROR; | |
1017 | goto cleanup; | |
1018 | } | |
1019 | ||
1020 | m = gfc_match_null (&initializer); | |
1021 | if (m == MATCH_NO) | |
1022 | { | |
1023 | gfc_error ("Pointer initialization requires a NULL at %C"); | |
1024 | m = MATCH_ERROR; | |
1025 | } | |
1026 | ||
1027 | if (gfc_pure (NULL)) | |
1028 | { | |
1029 | gfc_error | |
1030 | ("Initialization of pointer at %C is not allowed in a " | |
1031 | "PURE procedure"); | |
1032 | m = MATCH_ERROR; | |
1033 | } | |
1034 | ||
1035 | if (m != MATCH_YES) | |
1036 | goto cleanup; | |
1037 | ||
1038 | initializer->ts = current_ts; | |
1039 | ||
1040 | } | |
1041 | else if (gfc_match_char ('=') == MATCH_YES) | |
1042 | { | |
1043 | if (current_attr.pointer) | |
1044 | { | |
1045 | gfc_error | |
1046 | ("Pointer initialization at %C requires '=>', not '='"); | |
1047 | m = MATCH_ERROR; | |
1048 | goto cleanup; | |
1049 | } | |
1050 | ||
1051 | m = gfc_match_init_expr (&initializer); | |
1052 | if (m == MATCH_NO) | |
1053 | { | |
1054 | gfc_error ("Expected an initialization expression at %C"); | |
1055 | m = MATCH_ERROR; | |
1056 | } | |
1057 | ||
1058 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1059 | { | |
1060 | gfc_error | |
1061 | ("Initialization of variable at %C is not allowed in a " | |
1062 | "PURE procedure"); | |
1063 | m = MATCH_ERROR; | |
1064 | } | |
1065 | ||
1066 | if (m != MATCH_YES) | |
1067 | goto cleanup; | |
1068 | } | |
8ffad0f9 | 1069 | } |
1070 | ||
d9b3f26b | 1071 | /* Add the initializer. Note that it is fine if initializer is |
4ee9c684 | 1072 | NULL here, because we sometimes also need to check if a |
1073 | declaration *must* have an initialization expression. */ | |
1074 | if (gfc_current_state () != COMP_DERIVED) | |
1075 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1076 | else | |
d9b3f26b | 1077 | { |
1078 | if (current_ts.type == BT_DERIVED && !initializer) | |
1079 | initializer = gfc_default_initializer (¤t_ts); | |
1080 | t = build_struct (name, cl, &initializer, &as); | |
1081 | } | |
4ee9c684 | 1082 | |
1083 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1084 | ||
1085 | cleanup: | |
1086 | /* Free stuff up and return. */ | |
1087 | gfc_free_expr (initializer); | |
1088 | gfc_free_array_spec (as); | |
1089 | ||
1090 | return m; | |
1091 | } | |
1092 | ||
1093 | ||
1094 | /* Match an extended-f77 kind specification. */ | |
1095 | ||
1096 | match | |
1097 | gfc_match_old_kind_spec (gfc_typespec * ts) | |
1098 | { | |
1099 | match m; | |
1100 | ||
1101 | if (gfc_match_char ('*') != MATCH_YES) | |
1102 | return MATCH_NO; | |
1103 | ||
1104 | m = gfc_match_small_literal_int (&ts->kind); | |
1105 | if (m != MATCH_YES) | |
1106 | return MATCH_ERROR; | |
1107 | ||
1108 | /* Massage the kind numbers for complex types. */ | |
1109 | if (ts->type == BT_COMPLEX && ts->kind == 8) | |
1110 | ts->kind = 4; | |
1111 | if (ts->type == BT_COMPLEX && ts->kind == 16) | |
1112 | ts->kind = 8; | |
1113 | ||
f2d4ef3b | 1114 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1115 | { |
1116 | gfc_error ("Old-style kind %d not supported for type %s at %C", | |
1117 | ts->kind, gfc_basic_typename (ts->type)); | |
1118 | ||
1119 | return MATCH_ERROR; | |
1120 | } | |
1121 | ||
1122 | return MATCH_YES; | |
1123 | } | |
1124 | ||
1125 | ||
1126 | /* Match a kind specification. Since kinds are generally optional, we | |
1127 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1128 | string is found, then we know we have an error. */ | |
1129 | ||
1130 | match | |
1131 | gfc_match_kind_spec (gfc_typespec * ts) | |
1132 | { | |
1133 | locus where; | |
1134 | gfc_expr *e; | |
1135 | match m, n; | |
1136 | const char *msg; | |
1137 | ||
1138 | m = MATCH_NO; | |
1139 | e = NULL; | |
1140 | ||
cbb9e6aa | 1141 | where = gfc_current_locus; |
4ee9c684 | 1142 | |
1143 | if (gfc_match_char ('(') == MATCH_NO) | |
1144 | return MATCH_NO; | |
1145 | ||
1146 | /* Also gobbles optional text. */ | |
1147 | if (gfc_match (" kind = ") == MATCH_YES) | |
1148 | m = MATCH_ERROR; | |
1149 | ||
1150 | n = gfc_match_init_expr (&e); | |
1151 | if (n == MATCH_NO) | |
1152 | gfc_error ("Expected initialization expression at %C"); | |
1153 | if (n != MATCH_YES) | |
1154 | return MATCH_ERROR; | |
1155 | ||
1156 | if (e->rank != 0) | |
1157 | { | |
1158 | gfc_error ("Expected scalar initialization expression at %C"); | |
1159 | m = MATCH_ERROR; | |
1160 | goto no_match; | |
1161 | } | |
1162 | ||
1163 | msg = gfc_extract_int (e, &ts->kind); | |
1164 | if (msg != NULL) | |
1165 | { | |
1166 | gfc_error (msg); | |
1167 | m = MATCH_ERROR; | |
1168 | goto no_match; | |
1169 | } | |
1170 | ||
1171 | gfc_free_expr (e); | |
1172 | e = NULL; | |
1173 | ||
f2d4ef3b | 1174 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1175 | { |
1176 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
1177 | gfc_basic_typename (ts->type)); | |
1178 | ||
1179 | m = MATCH_ERROR; | |
1180 | goto no_match; | |
1181 | } | |
1182 | ||
1183 | if (gfc_match_char (')') != MATCH_YES) | |
1184 | { | |
1185 | gfc_error ("Missing right paren at %C"); | |
1186 | goto no_match; | |
1187 | } | |
1188 | ||
1189 | return MATCH_YES; | |
1190 | ||
1191 | no_match: | |
1192 | gfc_free_expr (e); | |
cbb9e6aa | 1193 | gfc_current_locus = where; |
4ee9c684 | 1194 | return m; |
1195 | } | |
1196 | ||
1197 | ||
1198 | /* Match the various kind/length specifications in a CHARACTER | |
1199 | declaration. We don't return MATCH_NO. */ | |
1200 | ||
1201 | static match | |
1202 | match_char_spec (gfc_typespec * ts) | |
1203 | { | |
1204 | int i, kind, seen_length; | |
1205 | gfc_charlen *cl; | |
1206 | gfc_expr *len; | |
1207 | match m; | |
1208 | ||
b8a891cb | 1209 | kind = gfc_default_character_kind; |
4ee9c684 | 1210 | len = NULL; |
1211 | seen_length = 0; | |
1212 | ||
1213 | /* Try the old-style specification first. */ | |
1214 | old_char_selector = 0; | |
1215 | ||
1216 | m = match_char_length (&len); | |
1217 | if (m != MATCH_NO) | |
1218 | { | |
1219 | if (m == MATCH_YES) | |
1220 | old_char_selector = 1; | |
1221 | seen_length = 1; | |
1222 | goto done; | |
1223 | } | |
1224 | ||
1225 | m = gfc_match_char ('('); | |
1226 | if (m != MATCH_YES) | |
1227 | { | |
1228 | m = MATCH_YES; /* character without length is a single char */ | |
1229 | goto done; | |
1230 | } | |
1231 | ||
1232 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ) */ | |
1233 | if (gfc_match (" kind =") == MATCH_YES) | |
1234 | { | |
1235 | m = gfc_match_small_int (&kind); | |
1236 | if (m == MATCH_ERROR) | |
1237 | goto done; | |
1238 | if (m == MATCH_NO) | |
1239 | goto syntax; | |
1240 | ||
1241 | if (gfc_match (" , len =") == MATCH_NO) | |
1242 | goto rparen; | |
1243 | ||
1244 | m = char_len_param_value (&len); | |
1245 | if (m == MATCH_NO) | |
1246 | goto syntax; | |
1247 | if (m == MATCH_ERROR) | |
1248 | goto done; | |
1249 | seen_length = 1; | |
1250 | ||
1251 | goto rparen; | |
1252 | } | |
1253 | ||
1254 | /* Try to match ( LEN = <len-param> ) or ( LEN = <len-param>, KIND = <int> ) */ | |
1255 | if (gfc_match (" len =") == MATCH_YES) | |
1256 | { | |
1257 | m = char_len_param_value (&len); | |
1258 | if (m == MATCH_NO) | |
1259 | goto syntax; | |
1260 | if (m == MATCH_ERROR) | |
1261 | goto done; | |
1262 | seen_length = 1; | |
1263 | ||
1264 | if (gfc_match_char (')') == MATCH_YES) | |
1265 | goto done; | |
1266 | ||
1267 | if (gfc_match (" , kind =") != MATCH_YES) | |
1268 | goto syntax; | |
1269 | ||
1270 | gfc_match_small_int (&kind); | |
1271 | ||
f2d4ef3b | 1272 | if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
4ee9c684 | 1273 | { |
1274 | gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); | |
1275 | return MATCH_YES; | |
1276 | } | |
1277 | ||
1278 | goto rparen; | |
1279 | } | |
1280 | ||
1281 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ) */ | |
1282 | m = char_len_param_value (&len); | |
1283 | if (m == MATCH_NO) | |
1284 | goto syntax; | |
1285 | if (m == MATCH_ERROR) | |
1286 | goto done; | |
1287 | seen_length = 1; | |
1288 | ||
1289 | m = gfc_match_char (')'); | |
1290 | if (m == MATCH_YES) | |
1291 | goto done; | |
1292 | ||
1293 | if (gfc_match_char (',') != MATCH_YES) | |
1294 | goto syntax; | |
1295 | ||
1296 | gfc_match (" kind ="); /* Gobble optional text */ | |
1297 | ||
1298 | m = gfc_match_small_int (&kind); | |
1299 | if (m == MATCH_ERROR) | |
1300 | goto done; | |
1301 | if (m == MATCH_NO) | |
1302 | goto syntax; | |
1303 | ||
1304 | rparen: | |
1305 | /* Require a right-paren at this point. */ | |
1306 | m = gfc_match_char (')'); | |
1307 | if (m == MATCH_YES) | |
1308 | goto done; | |
1309 | ||
1310 | syntax: | |
1311 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
1312 | m = MATCH_ERROR; | |
1313 | ||
1314 | done: | |
f2d4ef3b | 1315 | if (m == MATCH_YES && gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
4ee9c684 | 1316 | { |
1317 | gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); | |
1318 | m = MATCH_ERROR; | |
1319 | } | |
1320 | ||
1321 | if (m != MATCH_YES) | |
1322 | { | |
1323 | gfc_free_expr (len); | |
1324 | return m; | |
1325 | } | |
1326 | ||
1327 | /* Do some final massaging of the length values. */ | |
1328 | cl = gfc_get_charlen (); | |
1329 | cl->next = gfc_current_ns->cl_list; | |
1330 | gfc_current_ns->cl_list = cl; | |
1331 | ||
1332 | if (seen_length == 0) | |
1333 | cl->length = gfc_int_expr (1); | |
1334 | else | |
1335 | { | |
1336 | if (len == NULL || gfc_extract_int (len, &i) != NULL || i >= 0) | |
1337 | cl->length = len; | |
1338 | else | |
1339 | { | |
1340 | gfc_free_expr (len); | |
1341 | cl->length = gfc_int_expr (0); | |
1342 | } | |
1343 | } | |
1344 | ||
1345 | ts->cl = cl; | |
1346 | ts->kind = kind; | |
1347 | ||
1348 | return MATCH_YES; | |
1349 | } | |
1350 | ||
1351 | ||
1352 | /* Matches a type specification. If successful, sets the ts structure | |
1353 | to the matched specification. This is necessary for FUNCTION and | |
1354 | IMPLICIT statements. | |
1355 | ||
39351103 | 1356 | If implicit_flag is nonzero, then we don't check for the optional |
1357 | kind specification. Not doing so is needed for matching an IMPLICIT | |
4ee9c684 | 1358 | statement correctly. */ |
1359 | ||
39351103 | 1360 | static match |
1361 | match_type_spec (gfc_typespec * ts, int implicit_flag) | |
4ee9c684 | 1362 | { |
1363 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1364 | gfc_symbol *sym; | |
1365 | match m; | |
18f3698a | 1366 | int c; |
4ee9c684 | 1367 | |
1368 | gfc_clear_ts (ts); | |
1369 | ||
1370 | if (gfc_match (" integer") == MATCH_YES) | |
1371 | { | |
1372 | ts->type = BT_INTEGER; | |
b8a891cb | 1373 | ts->kind = gfc_default_integer_kind; |
4ee9c684 | 1374 | goto get_kind; |
1375 | } | |
1376 | ||
1377 | if (gfc_match (" character") == MATCH_YES) | |
1378 | { | |
1379 | ts->type = BT_CHARACTER; | |
39351103 | 1380 | if (implicit_flag == 0) |
1381 | return match_char_spec (ts); | |
1382 | else | |
1383 | return MATCH_YES; | |
4ee9c684 | 1384 | } |
1385 | ||
1386 | if (gfc_match (" real") == MATCH_YES) | |
1387 | { | |
1388 | ts->type = BT_REAL; | |
b8a891cb | 1389 | ts->kind = gfc_default_real_kind; |
4ee9c684 | 1390 | goto get_kind; |
1391 | } | |
1392 | ||
1393 | if (gfc_match (" double precision") == MATCH_YES) | |
1394 | { | |
1395 | ts->type = BT_REAL; | |
b8a891cb | 1396 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 1397 | return MATCH_YES; |
1398 | } | |
1399 | ||
1400 | if (gfc_match (" complex") == MATCH_YES) | |
1401 | { | |
1402 | ts->type = BT_COMPLEX; | |
b8a891cb | 1403 | ts->kind = gfc_default_complex_kind; |
4ee9c684 | 1404 | goto get_kind; |
1405 | } | |
1406 | ||
1407 | if (gfc_match (" double complex") == MATCH_YES) | |
1408 | { | |
1409 | ts->type = BT_COMPLEX; | |
b8a891cb | 1410 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 1411 | return MATCH_YES; |
1412 | } | |
1413 | ||
1414 | if (gfc_match (" logical") == MATCH_YES) | |
1415 | { | |
1416 | ts->type = BT_LOGICAL; | |
b8a891cb | 1417 | ts->kind = gfc_default_logical_kind; |
4ee9c684 | 1418 | goto get_kind; |
1419 | } | |
1420 | ||
1421 | m = gfc_match (" type ( %n )", name); | |
1422 | if (m != MATCH_YES) | |
1423 | return m; | |
1424 | ||
1425 | /* Search for the name but allow the components to be defined later. */ | |
1426 | if (gfc_get_ha_symbol (name, &sym)) | |
1427 | { | |
1428 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
1429 | return MATCH_ERROR; | |
1430 | } | |
1431 | ||
1432 | if (sym->attr.flavor != FL_DERIVED | |
950683ed | 1433 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 1434 | return MATCH_ERROR; |
1435 | ||
1436 | ts->type = BT_DERIVED; | |
1437 | ts->kind = 0; | |
1438 | ts->derived = sym; | |
1439 | ||
1440 | return MATCH_YES; | |
1441 | ||
1442 | get_kind: | |
1443 | /* For all types except double, derived and character, look for an | |
1444 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
39351103 | 1445 | if (implicit_flag == 1) |
4ee9c684 | 1446 | return MATCH_YES; |
1447 | ||
18f3698a | 1448 | if (gfc_current_form == FORM_FREE) |
1449 | { | |
1450 | c = gfc_peek_char(); | |
1451 | if (!gfc_is_whitespace(c) && c != '*' && c != '(' | |
1452 | && c != ':' && c != ',') | |
1453 | return MATCH_NO; | |
1454 | } | |
1455 | ||
4ee9c684 | 1456 | m = gfc_match_kind_spec (ts); |
1457 | if (m == MATCH_NO && ts->type != BT_CHARACTER) | |
1458 | m = gfc_match_old_kind_spec (ts); | |
1459 | ||
1460 | if (m == MATCH_NO) | |
1461 | m = MATCH_YES; /* No kind specifier found. */ | |
1462 | ||
1463 | return m; | |
1464 | } | |
1465 | ||
1466 | ||
39351103 | 1467 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
1468 | already matched in parse.c, or we would not end up here in the | |
1469 | first place. So the only thing we need to check, is if there is | |
1470 | trailing garbage. If not, the match is successful. */ | |
1471 | ||
1472 | match | |
1473 | gfc_match_implicit_none (void) | |
1474 | { | |
1475 | ||
1476 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; | |
1477 | } | |
1478 | ||
1479 | ||
1480 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
1481 | ||
1482 | static match | |
b70528c7 | 1483 | match_implicit_range (void) |
39351103 | 1484 | { |
1485 | int c, c1, c2, inner; | |
1486 | locus cur_loc; | |
1487 | ||
1488 | cur_loc = gfc_current_locus; | |
1489 | ||
1490 | gfc_gobble_whitespace (); | |
1491 | c = gfc_next_char (); | |
1492 | if (c != '(') | |
1493 | { | |
1494 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
1495 | goto bad; | |
1496 | } | |
1497 | ||
1498 | inner = 1; | |
1499 | while (inner) | |
1500 | { | |
1501 | gfc_gobble_whitespace (); | |
1502 | c1 = gfc_next_char (); | |
1503 | if (!ISALPHA (c1)) | |
1504 | goto bad; | |
1505 | ||
1506 | gfc_gobble_whitespace (); | |
1507 | c = gfc_next_char (); | |
1508 | ||
1509 | switch (c) | |
1510 | { | |
1511 | case ')': | |
1512 | inner = 0; /* Fall through */ | |
1513 | ||
1514 | case ',': | |
1515 | c2 = c1; | |
1516 | break; | |
1517 | ||
1518 | case '-': | |
1519 | gfc_gobble_whitespace (); | |
1520 | c2 = gfc_next_char (); | |
1521 | if (!ISALPHA (c2)) | |
1522 | goto bad; | |
1523 | ||
1524 | gfc_gobble_whitespace (); | |
1525 | c = gfc_next_char (); | |
1526 | ||
1527 | if ((c != ',') && (c != ')')) | |
1528 | goto bad; | |
1529 | if (c == ')') | |
1530 | inner = 0; | |
1531 | ||
1532 | break; | |
1533 | ||
1534 | default: | |
1535 | goto bad; | |
1536 | } | |
1537 | ||
1538 | if (c1 > c2) | |
1539 | { | |
1540 | gfc_error ("Letters must be in alphabetic order in " | |
1541 | "IMPLICIT statement at %C"); | |
1542 | goto bad; | |
1543 | } | |
1544 | ||
1545 | /* See if we can add the newly matched range to the pending | |
1546 | implicits from this IMPLICIT statement. We do not check for | |
1547 | conflicts with whatever earlier IMPLICIT statements may have | |
1548 | set. This is done when we've successfully finished matching | |
1549 | the current one. */ | |
b70528c7 | 1550 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
39351103 | 1551 | goto bad; |
1552 | } | |
1553 | ||
1554 | return MATCH_YES; | |
1555 | ||
1556 | bad: | |
1557 | gfc_syntax_error (ST_IMPLICIT); | |
1558 | ||
1559 | gfc_current_locus = cur_loc; | |
1560 | return MATCH_ERROR; | |
1561 | } | |
1562 | ||
1563 | ||
1564 | /* Match an IMPLICIT statement, storing the types for | |
1565 | gfc_set_implicit() if the statement is accepted by the parser. | |
1566 | There is a strange looking, but legal syntactic construction | |
1567 | possible. It looks like: | |
1568 | ||
1569 | IMPLICIT INTEGER (a-b) (c-d) | |
1570 | ||
1571 | This is legal if "a-b" is a constant expression that happens to | |
1572 | equal one of the legal kinds for integers. The real problem | |
1573 | happens with an implicit specification that looks like: | |
1574 | ||
1575 | IMPLICIT INTEGER (a-b) | |
1576 | ||
1577 | In this case, a typespec matcher that is "greedy" (as most of the | |
1578 | matchers are) gobbles the character range as a kindspec, leaving | |
1579 | nothing left. We therefore have to go a bit more slowly in the | |
1580 | matching process by inhibiting the kindspec checking during | |
1581 | typespec matching and checking for a kind later. */ | |
1582 | ||
1583 | match | |
1584 | gfc_match_implicit (void) | |
1585 | { | |
1586 | gfc_typespec ts; | |
1587 | locus cur_loc; | |
1588 | int c; | |
1589 | match m; | |
1590 | ||
1591 | /* We don't allow empty implicit statements. */ | |
1592 | if (gfc_match_eos () == MATCH_YES) | |
1593 | { | |
1594 | gfc_error ("Empty IMPLICIT statement at %C"); | |
1595 | return MATCH_ERROR; | |
1596 | } | |
1597 | ||
39351103 | 1598 | do |
1599 | { | |
b70528c7 | 1600 | /* First cleanup. */ |
1601 | gfc_clear_new_implicit (); | |
1602 | ||
39351103 | 1603 | /* A basic type is mandatory here. */ |
1604 | m = match_type_spec (&ts, 1); | |
1605 | if (m == MATCH_ERROR) | |
1606 | goto error; | |
1607 | if (m == MATCH_NO) | |
1608 | goto syntax; | |
1609 | ||
1610 | cur_loc = gfc_current_locus; | |
b70528c7 | 1611 | m = match_implicit_range (); |
39351103 | 1612 | |
1613 | if (m == MATCH_YES) | |
1614 | { | |
b70528c7 | 1615 | /* We may have <TYPE> (<RANGE>). */ |
39351103 | 1616 | gfc_gobble_whitespace (); |
1617 | c = gfc_next_char (); | |
1618 | if ((c == '\n') || (c == ',')) | |
b70528c7 | 1619 | { |
1620 | /* Check for CHARACTER with no length parameter. */ | |
1621 | if (ts.type == BT_CHARACTER && !ts.cl) | |
1622 | { | |
b8a891cb | 1623 | ts.kind = gfc_default_character_kind; |
b70528c7 | 1624 | ts.cl = gfc_get_charlen (); |
1625 | ts.cl->next = gfc_current_ns->cl_list; | |
1626 | gfc_current_ns->cl_list = ts.cl; | |
1627 | ts.cl->length = gfc_int_expr (1); | |
1628 | } | |
1629 | ||
1630 | /* Record the Successful match. */ | |
1631 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
1632 | return MATCH_ERROR; | |
1633 | continue; | |
1634 | } | |
39351103 | 1635 | |
1636 | gfc_current_locus = cur_loc; | |
1637 | } | |
1638 | ||
b70528c7 | 1639 | /* Discard the (incorrectly) matched range. */ |
1640 | gfc_clear_new_implicit (); | |
1641 | ||
1642 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
1643 | if (ts.type == BT_CHARACTER) | |
1644 | m = match_char_spec (&ts); | |
1645 | else | |
39351103 | 1646 | { |
b70528c7 | 1647 | m = gfc_match_kind_spec (&ts); |
39351103 | 1648 | if (m == MATCH_NO) |
b70528c7 | 1649 | { |
1650 | m = gfc_match_old_kind_spec (&ts); | |
1651 | if (m == MATCH_ERROR) | |
1652 | goto error; | |
1653 | if (m == MATCH_NO) | |
1654 | goto syntax; | |
1655 | } | |
39351103 | 1656 | } |
b70528c7 | 1657 | if (m == MATCH_ERROR) |
1658 | goto error; | |
39351103 | 1659 | |
b70528c7 | 1660 | m = match_implicit_range (); |
39351103 | 1661 | if (m == MATCH_ERROR) |
1662 | goto error; | |
1663 | if (m == MATCH_NO) | |
1664 | goto syntax; | |
1665 | ||
1666 | gfc_gobble_whitespace (); | |
1667 | c = gfc_next_char (); | |
1668 | if ((c != '\n') && (c != ',')) | |
1669 | goto syntax; | |
1670 | ||
b70528c7 | 1671 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
1672 | return MATCH_ERROR; | |
39351103 | 1673 | } |
1674 | while (c == ','); | |
1675 | ||
b70528c7 | 1676 | return MATCH_YES; |
39351103 | 1677 | |
1678 | syntax: | |
1679 | gfc_syntax_error (ST_IMPLICIT); | |
1680 | ||
1681 | error: | |
1682 | return MATCH_ERROR; | |
1683 | } | |
1684 | ||
1685 | ||
4ee9c684 | 1686 | /* Matches an attribute specification including array specs. If |
1687 | successful, leaves the variables current_attr and current_as | |
1688 | holding the specification. Also sets the colon_seen variable for | |
1689 | later use by matchers associated with initializations. | |
1690 | ||
1691 | This subroutine is a little tricky in the sense that we don't know | |
1692 | if we really have an attr-spec until we hit the double colon. | |
1693 | Until that time, we can only return MATCH_NO. This forces us to | |
1694 | check for duplicate specification at this level. */ | |
1695 | ||
1696 | static match | |
1697 | match_attr_spec (void) | |
1698 | { | |
1699 | ||
1700 | /* Modifiers that can exist in a type statement. */ | |
1701 | typedef enum | |
1702 | { GFC_DECL_BEGIN = 0, | |
1703 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
1704 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
1705 | DECL_PARAMETER, DECL_POINTER, DECL_PRIVATE, DECL_PUBLIC, DECL_SAVE, | |
1706 | DECL_TARGET, DECL_COLON, DECL_NONE, | |
1707 | GFC_DECL_END /* Sentinel */ | |
1708 | } | |
1709 | decl_types; | |
1710 | ||
1711 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
1712 | #define NUM_DECL GFC_DECL_END | |
1713 | ||
1714 | static mstring decls[] = { | |
1715 | minit (", allocatable", DECL_ALLOCATABLE), | |
1716 | minit (", dimension", DECL_DIMENSION), | |
1717 | minit (", external", DECL_EXTERNAL), | |
1718 | minit (", intent ( in )", DECL_IN), | |
1719 | minit (", intent ( out )", DECL_OUT), | |
1720 | minit (", intent ( in out )", DECL_INOUT), | |
1721 | minit (", intrinsic", DECL_INTRINSIC), | |
1722 | minit (", optional", DECL_OPTIONAL), | |
1723 | minit (", parameter", DECL_PARAMETER), | |
1724 | minit (", pointer", DECL_POINTER), | |
1725 | minit (", private", DECL_PRIVATE), | |
1726 | minit (", public", DECL_PUBLIC), | |
1727 | minit (", save", DECL_SAVE), | |
1728 | minit (", target", DECL_TARGET), | |
1729 | minit ("::", DECL_COLON), | |
1730 | minit (NULL, DECL_NONE) | |
1731 | }; | |
1732 | ||
1733 | locus start, seen_at[NUM_DECL]; | |
1734 | int seen[NUM_DECL]; | |
1735 | decl_types d; | |
1736 | const char *attr; | |
1737 | match m; | |
1738 | try t; | |
1739 | ||
1740 | gfc_clear_attr (¤t_attr); | |
cbb9e6aa | 1741 | start = gfc_current_locus; |
4ee9c684 | 1742 | |
1743 | current_as = NULL; | |
1744 | colon_seen = 0; | |
1745 | ||
1746 | /* See if we get all of the keywords up to the final double colon. */ | |
1747 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
1748 | seen[d] = 0; | |
1749 | ||
1750 | for (;;) | |
1751 | { | |
1752 | d = (decl_types) gfc_match_strings (decls); | |
1753 | if (d == DECL_NONE || d == DECL_COLON) | |
1754 | break; | |
1755 | ||
1756 | seen[d]++; | |
cbb9e6aa | 1757 | seen_at[d] = gfc_current_locus; |
4ee9c684 | 1758 | |
1759 | if (d == DECL_DIMENSION) | |
1760 | { | |
1761 | m = gfc_match_array_spec (¤t_as); | |
1762 | ||
1763 | if (m == MATCH_NO) | |
1764 | { | |
1765 | gfc_error ("Missing dimension specification at %C"); | |
1766 | m = MATCH_ERROR; | |
1767 | } | |
1768 | ||
1769 | if (m == MATCH_ERROR) | |
1770 | goto cleanup; | |
1771 | } | |
1772 | } | |
1773 | ||
1774 | /* No double colon, so assume that we've been looking at something | |
1775 | else the whole time. */ | |
1776 | if (d == DECL_NONE) | |
1777 | { | |
1778 | m = MATCH_NO; | |
1779 | goto cleanup; | |
1780 | } | |
1781 | ||
1782 | /* Since we've seen a double colon, we have to be looking at an | |
1783 | attr-spec. This means that we can now issue errors. */ | |
1784 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
1785 | if (seen[d] > 1) | |
1786 | { | |
1787 | switch (d) | |
1788 | { | |
1789 | case DECL_ALLOCATABLE: | |
1790 | attr = "ALLOCATABLE"; | |
1791 | break; | |
1792 | case DECL_DIMENSION: | |
1793 | attr = "DIMENSION"; | |
1794 | break; | |
1795 | case DECL_EXTERNAL: | |
1796 | attr = "EXTERNAL"; | |
1797 | break; | |
1798 | case DECL_IN: | |
1799 | attr = "INTENT (IN)"; | |
1800 | break; | |
1801 | case DECL_OUT: | |
1802 | attr = "INTENT (OUT)"; | |
1803 | break; | |
1804 | case DECL_INOUT: | |
1805 | attr = "INTENT (IN OUT)"; | |
1806 | break; | |
1807 | case DECL_INTRINSIC: | |
1808 | attr = "INTRINSIC"; | |
1809 | break; | |
1810 | case DECL_OPTIONAL: | |
1811 | attr = "OPTIONAL"; | |
1812 | break; | |
1813 | case DECL_PARAMETER: | |
1814 | attr = "PARAMETER"; | |
1815 | break; | |
1816 | case DECL_POINTER: | |
1817 | attr = "POINTER"; | |
1818 | break; | |
1819 | case DECL_PRIVATE: | |
1820 | attr = "PRIVATE"; | |
1821 | break; | |
1822 | case DECL_PUBLIC: | |
1823 | attr = "PUBLIC"; | |
1824 | break; | |
1825 | case DECL_SAVE: | |
1826 | attr = "SAVE"; | |
1827 | break; | |
1828 | case DECL_TARGET: | |
1829 | attr = "TARGET"; | |
1830 | break; | |
1831 | default: | |
1832 | attr = NULL; /* This shouldn't happen */ | |
1833 | } | |
1834 | ||
1835 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
1836 | m = MATCH_ERROR; | |
1837 | goto cleanup; | |
1838 | } | |
1839 | ||
1840 | /* Now that we've dealt with duplicate attributes, add the attributes | |
1841 | to the current attribute. */ | |
1842 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
1843 | { | |
1844 | if (seen[d] == 0) | |
1845 | continue; | |
1846 | ||
1847 | if (gfc_current_state () == COMP_DERIVED | |
1848 | && d != DECL_DIMENSION && d != DECL_POINTER | |
1849 | && d != DECL_COLON && d != DECL_NONE) | |
1850 | { | |
1851 | ||
1852 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
1853 | &seen_at[d]); | |
1854 | m = MATCH_ERROR; | |
1855 | goto cleanup; | |
1856 | } | |
1857 | ||
1858 | switch (d) | |
1859 | { | |
1860 | case DECL_ALLOCATABLE: | |
1861 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
1862 | break; | |
1863 | ||
1864 | case DECL_DIMENSION: | |
950683ed | 1865 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 1866 | break; |
1867 | ||
1868 | case DECL_EXTERNAL: | |
1869 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
1870 | break; | |
1871 | ||
1872 | case DECL_IN: | |
1873 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
1874 | break; | |
1875 | ||
1876 | case DECL_OUT: | |
1877 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
1878 | break; | |
1879 | ||
1880 | case DECL_INOUT: | |
1881 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
1882 | break; | |
1883 | ||
1884 | case DECL_INTRINSIC: | |
1885 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
1886 | break; | |
1887 | ||
1888 | case DECL_OPTIONAL: | |
1889 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
1890 | break; | |
1891 | ||
1892 | case DECL_PARAMETER: | |
950683ed | 1893 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
4ee9c684 | 1894 | break; |
1895 | ||
1896 | case DECL_POINTER: | |
1897 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
1898 | break; | |
1899 | ||
1900 | case DECL_PRIVATE: | |
950683ed | 1901 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
1902 | &seen_at[d]); | |
4ee9c684 | 1903 | break; |
1904 | ||
1905 | case DECL_PUBLIC: | |
950683ed | 1906 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
1907 | &seen_at[d]); | |
4ee9c684 | 1908 | break; |
1909 | ||
1910 | case DECL_SAVE: | |
950683ed | 1911 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 1912 | break; |
1913 | ||
1914 | case DECL_TARGET: | |
1915 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
1916 | break; | |
1917 | ||
1918 | default: | |
1919 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
1920 | } | |
1921 | ||
1922 | if (t == FAILURE) | |
1923 | { | |
1924 | m = MATCH_ERROR; | |
1925 | goto cleanup; | |
1926 | } | |
1927 | } | |
1928 | ||
1929 | colon_seen = 1; | |
1930 | return MATCH_YES; | |
1931 | ||
1932 | cleanup: | |
cbb9e6aa | 1933 | gfc_current_locus = start; |
4ee9c684 | 1934 | gfc_free_array_spec (current_as); |
1935 | current_as = NULL; | |
1936 | return m; | |
1937 | } | |
1938 | ||
1939 | ||
1940 | /* Match a data declaration statement. */ | |
1941 | ||
1942 | match | |
1943 | gfc_match_data_decl (void) | |
1944 | { | |
1945 | gfc_symbol *sym; | |
1946 | match m; | |
1947 | ||
39351103 | 1948 | m = match_type_spec (¤t_ts, 0); |
4ee9c684 | 1949 | if (m != MATCH_YES) |
1950 | return m; | |
1951 | ||
1952 | if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) | |
1953 | { | |
1954 | sym = gfc_use_derived (current_ts.derived); | |
1955 | ||
1956 | if (sym == NULL) | |
1957 | { | |
1958 | m = MATCH_ERROR; | |
1959 | goto cleanup; | |
1960 | } | |
1961 | ||
1962 | current_ts.derived = sym; | |
1963 | } | |
1964 | ||
1965 | m = match_attr_spec (); | |
1966 | if (m == MATCH_ERROR) | |
1967 | { | |
1968 | m = MATCH_NO; | |
1969 | goto cleanup; | |
1970 | } | |
1971 | ||
1972 | if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL) | |
1973 | { | |
1974 | ||
1975 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
1976 | goto ok; | |
1977 | ||
1978 | if (gfc_find_symbol (current_ts.derived->name, | |
1979 | current_ts.derived->ns->parent, 1, &sym) == 0) | |
1980 | goto ok; | |
1981 | ||
1982 | /* Hope that an ambiguous symbol is itself masked by a type definition. */ | |
1983 | if (sym != NULL && sym->attr.flavor == FL_DERIVED) | |
1984 | goto ok; | |
1985 | ||
1986 | gfc_error ("Derived type at %C has not been previously defined"); | |
1987 | m = MATCH_ERROR; | |
1988 | goto cleanup; | |
1989 | } | |
1990 | ||
1991 | ok: | |
1992 | /* If we have an old-style character declaration, and no new-style | |
1993 | attribute specifications, then there a comma is optional between | |
1994 | the type specification and the variable list. */ | |
1995 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
1996 | gfc_match_char (','); | |
1997 | ||
1998 | /* Give the types/attributes to symbols that follow. */ | |
1999 | for (;;) | |
2000 | { | |
2001 | m = variable_decl (); | |
2002 | if (m == MATCH_ERROR) | |
2003 | goto cleanup; | |
2004 | if (m == MATCH_NO) | |
2005 | break; | |
2006 | ||
2007 | if (gfc_match_eos () == MATCH_YES) | |
2008 | goto cleanup; | |
2009 | if (gfc_match_char (',') != MATCH_YES) | |
2010 | break; | |
2011 | } | |
2012 | ||
2013 | gfc_error ("Syntax error in data declaration at %C"); | |
2014 | m = MATCH_ERROR; | |
2015 | ||
2016 | cleanup: | |
2017 | gfc_free_array_spec (current_as); | |
2018 | current_as = NULL; | |
2019 | return m; | |
2020 | } | |
2021 | ||
2022 | ||
2023 | /* Match a prefix associated with a function or subroutine | |
2024 | declaration. If the typespec pointer is nonnull, then a typespec | |
2025 | can be matched. Note that if nothing matches, MATCH_YES is | |
2026 | returned (the null string was matched). */ | |
2027 | ||
2028 | static match | |
2029 | match_prefix (gfc_typespec * ts) | |
2030 | { | |
2031 | int seen_type; | |
2032 | ||
2033 | gfc_clear_attr (¤t_attr); | |
2034 | seen_type = 0; | |
2035 | ||
2036 | loop: | |
2037 | if (!seen_type && ts != NULL | |
39351103 | 2038 | && match_type_spec (ts, 0) == MATCH_YES |
4ee9c684 | 2039 | && gfc_match_space () == MATCH_YES) |
2040 | { | |
2041 | ||
2042 | seen_type = 1; | |
2043 | goto loop; | |
2044 | } | |
2045 | ||
2046 | if (gfc_match ("elemental% ") == MATCH_YES) | |
2047 | { | |
2048 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
2049 | return MATCH_ERROR; | |
2050 | ||
2051 | goto loop; | |
2052 | } | |
2053 | ||
2054 | if (gfc_match ("pure% ") == MATCH_YES) | |
2055 | { | |
2056 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
2057 | return MATCH_ERROR; | |
2058 | ||
2059 | goto loop; | |
2060 | } | |
2061 | ||
2062 | if (gfc_match ("recursive% ") == MATCH_YES) | |
2063 | { | |
2064 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
2065 | return MATCH_ERROR; | |
2066 | ||
2067 | goto loop; | |
2068 | } | |
2069 | ||
2070 | /* At this point, the next item is not a prefix. */ | |
2071 | return MATCH_YES; | |
2072 | } | |
2073 | ||
2074 | ||
2075 | /* Copy attributes matched by match_prefix() to attributes on a symbol. */ | |
2076 | ||
2077 | static try | |
2078 | copy_prefix (symbol_attribute * dest, locus * where) | |
2079 | { | |
2080 | ||
2081 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) | |
2082 | return FAILURE; | |
2083 | ||
2084 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
2085 | return FAILURE; | |
2086 | ||
2087 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
2088 | return FAILURE; | |
2089 | ||
2090 | return SUCCESS; | |
2091 | } | |
2092 | ||
2093 | ||
2094 | /* Match a formal argument list. */ | |
2095 | ||
2096 | match | |
2097 | gfc_match_formal_arglist (gfc_symbol * progname, int st_flag, int null_flag) | |
2098 | { | |
2099 | gfc_formal_arglist *head, *tail, *p, *q; | |
2100 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2101 | gfc_symbol *sym; | |
2102 | match m; | |
2103 | ||
2104 | head = tail = NULL; | |
2105 | ||
2106 | if (gfc_match_char ('(') != MATCH_YES) | |
2107 | { | |
2108 | if (null_flag) | |
2109 | goto ok; | |
2110 | return MATCH_NO; | |
2111 | } | |
2112 | ||
2113 | if (gfc_match_char (')') == MATCH_YES) | |
2114 | goto ok; | |
2115 | ||
2116 | for (;;) | |
2117 | { | |
2118 | if (gfc_match_char ('*') == MATCH_YES) | |
2119 | sym = NULL; | |
2120 | else | |
2121 | { | |
2122 | m = gfc_match_name (name); | |
2123 | if (m != MATCH_YES) | |
2124 | goto cleanup; | |
2125 | ||
2126 | if (gfc_get_symbol (name, NULL, &sym)) | |
2127 | goto cleanup; | |
2128 | } | |
2129 | ||
2130 | p = gfc_get_formal_arglist (); | |
2131 | ||
2132 | if (head == NULL) | |
2133 | head = tail = p; | |
2134 | else | |
2135 | { | |
2136 | tail->next = p; | |
2137 | tail = p; | |
2138 | } | |
2139 | ||
2140 | tail->sym = sym; | |
2141 | ||
2142 | /* We don't add the VARIABLE flavor because the name could be a | |
2143 | dummy procedure. We don't apply these attributes to formal | |
2144 | arguments of statement functions. */ | |
2145 | if (sym != NULL && !st_flag | |
950683ed | 2146 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
4ee9c684 | 2147 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
2148 | { | |
2149 | m = MATCH_ERROR; | |
2150 | goto cleanup; | |
2151 | } | |
2152 | ||
2153 | /* The name of a program unit can be in a different namespace, | |
2154 | so check for it explicitly. After the statement is accepted, | |
2155 | the name is checked for especially in gfc_get_symbol(). */ | |
2156 | if (gfc_new_block != NULL && sym != NULL | |
2157 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
2158 | { | |
2159 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
2160 | sym->name); | |
2161 | m = MATCH_ERROR; | |
2162 | goto cleanup; | |
2163 | } | |
2164 | ||
2165 | if (gfc_match_char (')') == MATCH_YES) | |
2166 | goto ok; | |
2167 | ||
2168 | m = gfc_match_char (','); | |
2169 | if (m != MATCH_YES) | |
2170 | { | |
2171 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
2172 | goto cleanup; | |
2173 | } | |
2174 | } | |
2175 | ||
2176 | ok: | |
2177 | /* Check for duplicate symbols in the formal argument list. */ | |
2178 | if (head != NULL) | |
2179 | { | |
2180 | for (p = head; p->next; p = p->next) | |
2181 | { | |
2182 | if (p->sym == NULL) | |
2183 | continue; | |
2184 | ||
2185 | for (q = p->next; q; q = q->next) | |
2186 | if (p->sym == q->sym) | |
2187 | { | |
2188 | gfc_error | |
2189 | ("Duplicate symbol '%s' in formal argument list at %C", | |
2190 | p->sym->name); | |
2191 | ||
2192 | m = MATCH_ERROR; | |
2193 | goto cleanup; | |
2194 | } | |
2195 | } | |
2196 | } | |
2197 | ||
2198 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) == | |
2199 | FAILURE) | |
2200 | { | |
2201 | m = MATCH_ERROR; | |
2202 | goto cleanup; | |
2203 | } | |
2204 | ||
2205 | return MATCH_YES; | |
2206 | ||
2207 | cleanup: | |
2208 | gfc_free_formal_arglist (head); | |
2209 | return m; | |
2210 | } | |
2211 | ||
2212 | ||
2213 | /* Match a RESULT specification following a function declaration or | |
2214 | ENTRY statement. Also matches the end-of-statement. */ | |
2215 | ||
2216 | static match | |
2217 | match_result (gfc_symbol * function, gfc_symbol ** result) | |
2218 | { | |
2219 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2220 | gfc_symbol *r; | |
2221 | match m; | |
2222 | ||
2223 | if (gfc_match (" result (") != MATCH_YES) | |
2224 | return MATCH_NO; | |
2225 | ||
2226 | m = gfc_match_name (name); | |
2227 | if (m != MATCH_YES) | |
2228 | return m; | |
2229 | ||
2230 | if (gfc_match (" )%t") != MATCH_YES) | |
2231 | { | |
2232 | gfc_error ("Unexpected junk following RESULT variable at %C"); | |
2233 | return MATCH_ERROR; | |
2234 | } | |
2235 | ||
2236 | if (strcmp (function->name, name) == 0) | |
2237 | { | |
2238 | gfc_error | |
2239 | ("RESULT variable at %C must be different than function name"); | |
2240 | return MATCH_ERROR; | |
2241 | } | |
2242 | ||
2243 | if (gfc_get_symbol (name, NULL, &r)) | |
2244 | return MATCH_ERROR; | |
2245 | ||
950683ed | 2246 | if (gfc_add_flavor (&r->attr, FL_VARIABLE, r->name, NULL) == FAILURE |
2247 | || gfc_add_result (&r->attr, r->name, NULL) == FAILURE) | |
4ee9c684 | 2248 | return MATCH_ERROR; |
2249 | ||
2250 | *result = r; | |
2251 | ||
2252 | return MATCH_YES; | |
2253 | } | |
2254 | ||
2255 | ||
2256 | /* Match a function declaration. */ | |
2257 | ||
2258 | match | |
2259 | gfc_match_function_decl (void) | |
2260 | { | |
2261 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2262 | gfc_symbol *sym, *result; | |
2263 | locus old_loc; | |
2264 | match m; | |
2265 | ||
2266 | if (gfc_current_state () != COMP_NONE | |
2267 | && gfc_current_state () != COMP_INTERFACE | |
2268 | && gfc_current_state () != COMP_CONTAINS) | |
2269 | return MATCH_NO; | |
2270 | ||
2271 | gfc_clear_ts (¤t_ts); | |
2272 | ||
cbb9e6aa | 2273 | old_loc = gfc_current_locus; |
4ee9c684 | 2274 | |
2275 | m = match_prefix (¤t_ts); | |
2276 | if (m != MATCH_YES) | |
2277 | { | |
cbb9e6aa | 2278 | gfc_current_locus = old_loc; |
4ee9c684 | 2279 | return m; |
2280 | } | |
2281 | ||
2282 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
2283 | { | |
cbb9e6aa | 2284 | gfc_current_locus = old_loc; |
4ee9c684 | 2285 | return MATCH_NO; |
2286 | } | |
2287 | ||
2288 | if (get_proc_name (name, &sym)) | |
2289 | return MATCH_ERROR; | |
2290 | gfc_new_block = sym; | |
2291 | ||
2292 | m = gfc_match_formal_arglist (sym, 0, 0); | |
2293 | if (m == MATCH_NO) | |
2294 | gfc_error ("Expected formal argument list in function definition at %C"); | |
2295 | else if (m == MATCH_ERROR) | |
2296 | goto cleanup; | |
2297 | ||
2298 | result = NULL; | |
2299 | ||
2300 | if (gfc_match_eos () != MATCH_YES) | |
2301 | { | |
2302 | /* See if a result variable is present. */ | |
2303 | m = match_result (sym, &result); | |
2304 | if (m == MATCH_NO) | |
2305 | gfc_error ("Unexpected junk after function declaration at %C"); | |
2306 | ||
2307 | if (m != MATCH_YES) | |
2308 | { | |
2309 | m = MATCH_ERROR; | |
2310 | goto cleanup; | |
2311 | } | |
2312 | } | |
2313 | ||
2314 | /* Make changes to the symbol. */ | |
2315 | m = MATCH_ERROR; | |
2316 | ||
950683ed | 2317 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) |
4ee9c684 | 2318 | goto cleanup; |
2319 | ||
2320 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
2321 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
2322 | goto cleanup; | |
2323 | ||
2324 | if (current_ts.type != BT_UNKNOWN && sym->ts.type != BT_UNKNOWN) | |
2325 | { | |
2326 | gfc_error ("Function '%s' at %C already has a type of %s", name, | |
2327 | gfc_basic_typename (sym->ts.type)); | |
2328 | goto cleanup; | |
2329 | } | |
2330 | ||
2331 | if (result == NULL) | |
2332 | { | |
2333 | sym->ts = current_ts; | |
2334 | sym->result = sym; | |
2335 | } | |
2336 | else | |
2337 | { | |
2338 | result->ts = current_ts; | |
2339 | sym->result = result; | |
2340 | } | |
2341 | ||
2342 | return MATCH_YES; | |
2343 | ||
2344 | cleanup: | |
cbb9e6aa | 2345 | gfc_current_locus = old_loc; |
4ee9c684 | 2346 | return m; |
2347 | } | |
2348 | ||
2349 | ||
2350 | /* Match an ENTRY statement. */ | |
2351 | ||
2352 | match | |
2353 | gfc_match_entry (void) | |
2354 | { | |
1b716045 | 2355 | gfc_symbol *proc; |
2356 | gfc_symbol *result; | |
2357 | gfc_symbol *entry; | |
4ee9c684 | 2358 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
2359 | gfc_compile_state state; | |
2360 | match m; | |
1b716045 | 2361 | gfc_entry_list *el; |
4ee9c684 | 2362 | |
2363 | m = gfc_match_name (name); | |
2364 | if (m != MATCH_YES) | |
2365 | return m; | |
2366 | ||
1b716045 | 2367 | state = gfc_current_state (); |
2368 | if (state != COMP_SUBROUTINE | |
2369 | && state != COMP_FUNCTION) | |
2370 | { | |
2371 | gfc_error ("ENTRY statement at %C cannot appear within %s", | |
2372 | gfc_state_name (gfc_current_state ())); | |
2373 | return MATCH_ERROR; | |
2374 | } | |
2375 | ||
2376 | if (gfc_current_ns->parent != NULL | |
2377 | && gfc_current_ns->parent->proc_name | |
2378 | && gfc_current_ns->parent->proc_name->attr.flavor != FL_MODULE) | |
2379 | { | |
2380 | gfc_error("ENTRY statement at %C cannot appear in a " | |
2381 | "contained procedure"); | |
2382 | return MATCH_ERROR; | |
2383 | } | |
2384 | ||
4ee9c684 | 2385 | if (get_proc_name (name, &entry)) |
2386 | return MATCH_ERROR; | |
2387 | ||
1b716045 | 2388 | proc = gfc_current_block (); |
2389 | ||
2390 | if (state == COMP_SUBROUTINE) | |
4ee9c684 | 2391 | { |
950683ed | 2392 | /* An entry in a subroutine. */ |
4ee9c684 | 2393 | m = gfc_match_formal_arglist (entry, 0, 1); |
2394 | if (m != MATCH_YES) | |
2395 | return MATCH_ERROR; | |
2396 | ||
950683ed | 2397 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
2398 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 2399 | return MATCH_ERROR; |
1b716045 | 2400 | } |
2401 | else | |
2402 | { | |
2403 | /* An entry in a function. */ | |
69643e1d | 2404 | m = gfc_match_formal_arglist (entry, 0, 1); |
4ee9c684 | 2405 | if (m != MATCH_YES) |
2406 | return MATCH_ERROR; | |
2407 | ||
4ee9c684 | 2408 | result = NULL; |
2409 | ||
2410 | if (gfc_match_eos () == MATCH_YES) | |
2411 | { | |
950683ed | 2412 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
2413 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 2414 | return MATCH_ERROR; |
2415 | ||
c6871095 | 2416 | entry->result = entry; |
4ee9c684 | 2417 | } |
2418 | else | |
2419 | { | |
1b716045 | 2420 | m = match_result (proc, &result); |
4ee9c684 | 2421 | if (m == MATCH_NO) |
2422 | gfc_syntax_error (ST_ENTRY); | |
2423 | if (m != MATCH_YES) | |
2424 | return MATCH_ERROR; | |
2425 | ||
950683ed | 2426 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE |
2427 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
2428 | || gfc_add_function (&entry->attr, result->name, | |
2429 | NULL) == FAILURE) | |
4ee9c684 | 2430 | return MATCH_ERROR; |
c6871095 | 2431 | |
2432 | entry->result = result; | |
4ee9c684 | 2433 | } |
2434 | ||
1b716045 | 2435 | if (proc->attr.recursive && result == NULL) |
4ee9c684 | 2436 | { |
2437 | gfc_error ("RESULT attribute required in ENTRY statement at %C"); | |
2438 | return MATCH_ERROR; | |
2439 | } | |
4ee9c684 | 2440 | } |
2441 | ||
2442 | if (gfc_match_eos () != MATCH_YES) | |
2443 | { | |
2444 | gfc_syntax_error (ST_ENTRY); | |
2445 | return MATCH_ERROR; | |
2446 | } | |
2447 | ||
1b716045 | 2448 | entry->attr.recursive = proc->attr.recursive; |
2449 | entry->attr.elemental = proc->attr.elemental; | |
2450 | entry->attr.pure = proc->attr.pure; | |
4ee9c684 | 2451 | |
1b716045 | 2452 | el = gfc_get_entry_list (); |
2453 | el->sym = entry; | |
2454 | el->next = gfc_current_ns->entries; | |
2455 | gfc_current_ns->entries = el; | |
2456 | if (el->next) | |
2457 | el->id = el->next->id + 1; | |
2458 | else | |
2459 | el->id = 1; | |
4ee9c684 | 2460 | |
1b716045 | 2461 | new_st.op = EXEC_ENTRY; |
2462 | new_st.ext.entry = el; | |
2463 | ||
2464 | return MATCH_YES; | |
4ee9c684 | 2465 | } |
2466 | ||
2467 | ||
2468 | /* Match a subroutine statement, including optional prefixes. */ | |
2469 | ||
2470 | match | |
2471 | gfc_match_subroutine (void) | |
2472 | { | |
2473 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2474 | gfc_symbol *sym; | |
2475 | match m; | |
2476 | ||
2477 | if (gfc_current_state () != COMP_NONE | |
2478 | && gfc_current_state () != COMP_INTERFACE | |
2479 | && gfc_current_state () != COMP_CONTAINS) | |
2480 | return MATCH_NO; | |
2481 | ||
2482 | m = match_prefix (NULL); | |
2483 | if (m != MATCH_YES) | |
2484 | return m; | |
2485 | ||
2486 | m = gfc_match ("subroutine% %n", name); | |
2487 | if (m != MATCH_YES) | |
2488 | return m; | |
2489 | ||
2490 | if (get_proc_name (name, &sym)) | |
2491 | return MATCH_ERROR; | |
2492 | gfc_new_block = sym; | |
2493 | ||
950683ed | 2494 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
4ee9c684 | 2495 | return MATCH_ERROR; |
2496 | ||
2497 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
2498 | return MATCH_ERROR; | |
2499 | ||
2500 | if (gfc_match_eos () != MATCH_YES) | |
2501 | { | |
2502 | gfc_syntax_error (ST_SUBROUTINE); | |
2503 | return MATCH_ERROR; | |
2504 | } | |
2505 | ||
2506 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
2507 | return MATCH_ERROR; | |
2508 | ||
2509 | return MATCH_YES; | |
2510 | } | |
2511 | ||
2512 | ||
231e961a | 2513 | /* Return nonzero if we're currently compiling a contained procedure. */ |
c0985832 | 2514 | |
2515 | static int | |
2516 | contained_procedure (void) | |
2517 | { | |
2518 | gfc_state_data *s; | |
2519 | ||
2520 | for (s=gfc_state_stack; s; s=s->previous) | |
2521 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) | |
2522 | && s->previous != NULL | |
2523 | && s->previous->state == COMP_CONTAINS) | |
2524 | return 1; | |
2525 | ||
2526 | return 0; | |
2527 | } | |
2528 | ||
4ee9c684 | 2529 | /* Match any of the various end-block statements. Returns the type of |
2530 | END to the caller. The END INTERFACE, END IF, END DO and END | |
2531 | SELECT statements cannot be replaced by a single END statement. */ | |
2532 | ||
2533 | match | |
2534 | gfc_match_end (gfc_statement * st) | |
2535 | { | |
2536 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2537 | gfc_compile_state state; | |
2538 | locus old_loc; | |
2539 | const char *block_name; | |
2540 | const char *target; | |
c0985832 | 2541 | int eos_ok; |
4ee9c684 | 2542 | match m; |
2543 | ||
cbb9e6aa | 2544 | old_loc = gfc_current_locus; |
4ee9c684 | 2545 | if (gfc_match ("end") != MATCH_YES) |
2546 | return MATCH_NO; | |
2547 | ||
2548 | state = gfc_current_state (); | |
2549 | block_name = | |
2550 | gfc_current_block () == NULL ? NULL : gfc_current_block ()->name; | |
2551 | ||
2552 | if (state == COMP_CONTAINS) | |
2553 | { | |
2554 | state = gfc_state_stack->previous->state; | |
2555 | block_name = gfc_state_stack->previous->sym == NULL ? NULL | |
2556 | : gfc_state_stack->previous->sym->name; | |
2557 | } | |
2558 | ||
2559 | switch (state) | |
2560 | { | |
2561 | case COMP_NONE: | |
2562 | case COMP_PROGRAM: | |
2563 | *st = ST_END_PROGRAM; | |
2564 | target = " program"; | |
c0985832 | 2565 | eos_ok = 1; |
4ee9c684 | 2566 | break; |
2567 | ||
2568 | case COMP_SUBROUTINE: | |
2569 | *st = ST_END_SUBROUTINE; | |
2570 | target = " subroutine"; | |
c0985832 | 2571 | eos_ok = !contained_procedure (); |
4ee9c684 | 2572 | break; |
2573 | ||
2574 | case COMP_FUNCTION: | |
2575 | *st = ST_END_FUNCTION; | |
2576 | target = " function"; | |
c0985832 | 2577 | eos_ok = !contained_procedure (); |
4ee9c684 | 2578 | break; |
2579 | ||
2580 | case COMP_BLOCK_DATA: | |
2581 | *st = ST_END_BLOCK_DATA; | |
2582 | target = " block data"; | |
c0985832 | 2583 | eos_ok = 1; |
4ee9c684 | 2584 | break; |
2585 | ||
2586 | case COMP_MODULE: | |
2587 | *st = ST_END_MODULE; | |
2588 | target = " module"; | |
c0985832 | 2589 | eos_ok = 1; |
4ee9c684 | 2590 | break; |
2591 | ||
2592 | case COMP_INTERFACE: | |
2593 | *st = ST_END_INTERFACE; | |
2594 | target = " interface"; | |
c0985832 | 2595 | eos_ok = 0; |
4ee9c684 | 2596 | break; |
2597 | ||
2598 | case COMP_DERIVED: | |
2599 | *st = ST_END_TYPE; | |
2600 | target = " type"; | |
c0985832 | 2601 | eos_ok = 0; |
4ee9c684 | 2602 | break; |
2603 | ||
2604 | case COMP_IF: | |
2605 | *st = ST_ENDIF; | |
2606 | target = " if"; | |
c0985832 | 2607 | eos_ok = 0; |
4ee9c684 | 2608 | break; |
2609 | ||
2610 | case COMP_DO: | |
2611 | *st = ST_ENDDO; | |
2612 | target = " do"; | |
c0985832 | 2613 | eos_ok = 0; |
4ee9c684 | 2614 | break; |
2615 | ||
2616 | case COMP_SELECT: | |
2617 | *st = ST_END_SELECT; | |
2618 | target = " select"; | |
c0985832 | 2619 | eos_ok = 0; |
4ee9c684 | 2620 | break; |
2621 | ||
2622 | case COMP_FORALL: | |
2623 | *st = ST_END_FORALL; | |
2624 | target = " forall"; | |
c0985832 | 2625 | eos_ok = 0; |
4ee9c684 | 2626 | break; |
2627 | ||
2628 | case COMP_WHERE: | |
2629 | *st = ST_END_WHERE; | |
2630 | target = " where"; | |
c0985832 | 2631 | eos_ok = 0; |
4ee9c684 | 2632 | break; |
2633 | ||
2634 | default: | |
2635 | gfc_error ("Unexpected END statement at %C"); | |
2636 | goto cleanup; | |
2637 | } | |
2638 | ||
2639 | if (gfc_match_eos () == MATCH_YES) | |
2640 | { | |
c0985832 | 2641 | if (!eos_ok) |
4ee9c684 | 2642 | { |
c0985832 | 2643 | /* We would have required END [something] */ |
d197c9ee | 2644 | gfc_error ("%s statement expected at %L", |
2645 | gfc_ascii_statement (*st), &old_loc); | |
4ee9c684 | 2646 | goto cleanup; |
2647 | } | |
2648 | ||
2649 | return MATCH_YES; | |
2650 | } | |
2651 | ||
2652 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
2653 | if (gfc_match (target) != MATCH_YES) | |
2654 | { | |
2655 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
2656 | goto cleanup; | |
2657 | } | |
2658 | ||
2659 | /* If we're at the end, make sure a block name wasn't required. */ | |
2660 | if (gfc_match_eos () == MATCH_YES) | |
2661 | { | |
2662 | ||
2663 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT) | |
2664 | return MATCH_YES; | |
2665 | ||
2666 | if (gfc_current_block () == NULL) | |
2667 | return MATCH_YES; | |
2668 | ||
2669 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
2670 | block_name, gfc_ascii_statement (*st)); | |
2671 | ||
2672 | return MATCH_ERROR; | |
2673 | } | |
2674 | ||
2675 | /* END INTERFACE has a special handler for its several possible endings. */ | |
2676 | if (*st == ST_END_INTERFACE) | |
2677 | return gfc_match_end_interface (); | |
2678 | ||
2679 | /* We haven't hit the end of statement, so what is left must be an end-name. */ | |
2680 | m = gfc_match_space (); | |
2681 | if (m == MATCH_YES) | |
2682 | m = gfc_match_name (name); | |
2683 | ||
2684 | if (m == MATCH_NO) | |
2685 | gfc_error ("Expected terminating name at %C"); | |
2686 | if (m != MATCH_YES) | |
2687 | goto cleanup; | |
2688 | ||
2689 | if (block_name == NULL) | |
2690 | goto syntax; | |
2691 | ||
2692 | if (strcmp (name, block_name) != 0) | |
2693 | { | |
2694 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
2695 | gfc_ascii_statement (*st)); | |
2696 | goto cleanup; | |
2697 | } | |
2698 | ||
2699 | if (gfc_match_eos () == MATCH_YES) | |
2700 | return MATCH_YES; | |
2701 | ||
2702 | syntax: | |
2703 | gfc_syntax_error (*st); | |
2704 | ||
2705 | cleanup: | |
cbb9e6aa | 2706 | gfc_current_locus = old_loc; |
4ee9c684 | 2707 | return MATCH_ERROR; |
2708 | } | |
2709 | ||
2710 | ||
2711 | ||
2712 | /***************** Attribute declaration statements ****************/ | |
2713 | ||
2714 | /* Set the attribute of a single variable. */ | |
2715 | ||
2716 | static match | |
2717 | attr_decl1 (void) | |
2718 | { | |
2719 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2720 | gfc_array_spec *as; | |
2721 | gfc_symbol *sym; | |
2722 | locus var_locus; | |
2723 | match m; | |
2724 | ||
2725 | as = NULL; | |
2726 | ||
2727 | m = gfc_match_name (name); | |
2728 | if (m != MATCH_YES) | |
2729 | goto cleanup; | |
2730 | ||
2731 | if (find_special (name, &sym)) | |
2732 | return MATCH_ERROR; | |
2733 | ||
cbb9e6aa | 2734 | var_locus = gfc_current_locus; |
4ee9c684 | 2735 | |
2736 | /* Deal with possible array specification for certain attributes. */ | |
2737 | if (current_attr.dimension | |
2738 | || current_attr.allocatable | |
2739 | || current_attr.pointer | |
2740 | || current_attr.target) | |
2741 | { | |
2742 | m = gfc_match_array_spec (&as); | |
2743 | if (m == MATCH_ERROR) | |
2744 | goto cleanup; | |
2745 | ||
2746 | if (current_attr.dimension && m == MATCH_NO) | |
2747 | { | |
2748 | gfc_error | |
2749 | ("Missing array specification at %L in DIMENSION statement", | |
2750 | &var_locus); | |
2751 | m = MATCH_ERROR; | |
2752 | goto cleanup; | |
2753 | } | |
2754 | ||
2755 | if ((current_attr.allocatable || current_attr.pointer) | |
2756 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
2757 | { | |
2758 | gfc_error ("Array specification must be deferred at %L", | |
2759 | &var_locus); | |
2760 | m = MATCH_ERROR; | |
2761 | goto cleanup; | |
2762 | } | |
2763 | } | |
2764 | ||
2765 | /* Update symbol table. DIMENSION attribute is set in gfc_set_array_spec(). */ | |
2766 | if (current_attr.dimension == 0 | |
2767 | && gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
2768 | { | |
2769 | m = MATCH_ERROR; | |
2770 | goto cleanup; | |
2771 | } | |
2772 | ||
2773 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
2774 | { | |
2775 | m = MATCH_ERROR; | |
2776 | goto cleanup; | |
2777 | } | |
2778 | ||
2779 | if ((current_attr.external || current_attr.intrinsic) | |
2780 | && sym->attr.flavor != FL_PROCEDURE | |
950683ed | 2781 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
4ee9c684 | 2782 | { |
2783 | m = MATCH_ERROR; | |
2784 | goto cleanup; | |
2785 | } | |
2786 | ||
2787 | return MATCH_YES; | |
2788 | ||
2789 | cleanup: | |
2790 | gfc_free_array_spec (as); | |
2791 | return m; | |
2792 | } | |
2793 | ||
2794 | ||
2795 | /* Generic attribute declaration subroutine. Used for attributes that | |
2796 | just have a list of names. */ | |
2797 | ||
2798 | static match | |
2799 | attr_decl (void) | |
2800 | { | |
2801 | match m; | |
2802 | ||
2803 | /* Gobble the optional double colon, by simply ignoring the result | |
2804 | of gfc_match(). */ | |
2805 | gfc_match (" ::"); | |
2806 | ||
2807 | for (;;) | |
2808 | { | |
2809 | m = attr_decl1 (); | |
2810 | if (m != MATCH_YES) | |
2811 | break; | |
2812 | ||
2813 | if (gfc_match_eos () == MATCH_YES) | |
2814 | { | |
2815 | m = MATCH_YES; | |
2816 | break; | |
2817 | } | |
2818 | ||
2819 | if (gfc_match_char (',') != MATCH_YES) | |
2820 | { | |
2821 | gfc_error ("Unexpected character in variable list at %C"); | |
2822 | m = MATCH_ERROR; | |
2823 | break; | |
2824 | } | |
2825 | } | |
2826 | ||
2827 | return m; | |
2828 | } | |
2829 | ||
2830 | ||
2831 | match | |
2832 | gfc_match_external (void) | |
2833 | { | |
2834 | ||
2835 | gfc_clear_attr (¤t_attr); | |
2836 | gfc_add_external (¤t_attr, NULL); | |
2837 | ||
2838 | return attr_decl (); | |
2839 | } | |
2840 | ||
2841 | ||
2842 | ||
2843 | match | |
2844 | gfc_match_intent (void) | |
2845 | { | |
2846 | sym_intent intent; | |
2847 | ||
2848 | intent = match_intent_spec (); | |
2849 | if (intent == INTENT_UNKNOWN) | |
2850 | return MATCH_ERROR; | |
2851 | ||
2852 | gfc_clear_attr (¤t_attr); | |
2853 | gfc_add_intent (¤t_attr, intent, NULL); /* Can't fail */ | |
2854 | ||
2855 | return attr_decl (); | |
2856 | } | |
2857 | ||
2858 | ||
2859 | match | |
2860 | gfc_match_intrinsic (void) | |
2861 | { | |
2862 | ||
2863 | gfc_clear_attr (¤t_attr); | |
2864 | gfc_add_intrinsic (¤t_attr, NULL); | |
2865 | ||
2866 | return attr_decl (); | |
2867 | } | |
2868 | ||
2869 | ||
2870 | match | |
2871 | gfc_match_optional (void) | |
2872 | { | |
2873 | ||
2874 | gfc_clear_attr (¤t_attr); | |
2875 | gfc_add_optional (¤t_attr, NULL); | |
2876 | ||
2877 | return attr_decl (); | |
2878 | } | |
2879 | ||
2880 | ||
2881 | match | |
2882 | gfc_match_pointer (void) | |
2883 | { | |
2884 | ||
2885 | gfc_clear_attr (¤t_attr); | |
2886 | gfc_add_pointer (¤t_attr, NULL); | |
2887 | ||
2888 | return attr_decl (); | |
2889 | } | |
2890 | ||
2891 | ||
2892 | match | |
2893 | gfc_match_allocatable (void) | |
2894 | { | |
2895 | ||
2896 | gfc_clear_attr (¤t_attr); | |
2897 | gfc_add_allocatable (¤t_attr, NULL); | |
2898 | ||
2899 | return attr_decl (); | |
2900 | } | |
2901 | ||
2902 | ||
2903 | match | |
2904 | gfc_match_dimension (void) | |
2905 | { | |
2906 | ||
2907 | gfc_clear_attr (¤t_attr); | |
950683ed | 2908 | gfc_add_dimension (¤t_attr, NULL, NULL); |
4ee9c684 | 2909 | |
2910 | return attr_decl (); | |
2911 | } | |
2912 | ||
2913 | ||
2914 | match | |
2915 | gfc_match_target (void) | |
2916 | { | |
2917 | ||
2918 | gfc_clear_attr (¤t_attr); | |
2919 | gfc_add_target (¤t_attr, NULL); | |
2920 | ||
2921 | return attr_decl (); | |
2922 | } | |
2923 | ||
2924 | ||
2925 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
2926 | statement. */ | |
2927 | ||
2928 | static match | |
2929 | access_attr_decl (gfc_statement st) | |
2930 | { | |
2931 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2932 | interface_type type; | |
2933 | gfc_user_op *uop; | |
2934 | gfc_symbol *sym; | |
2935 | gfc_intrinsic_op operator; | |
2936 | match m; | |
2937 | ||
2938 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
2939 | goto done; | |
2940 | ||
2941 | for (;;) | |
2942 | { | |
2943 | m = gfc_match_generic_spec (&type, name, &operator); | |
2944 | if (m == MATCH_NO) | |
2945 | goto syntax; | |
2946 | if (m == MATCH_ERROR) | |
2947 | return MATCH_ERROR; | |
2948 | ||
2949 | switch (type) | |
2950 | { | |
2951 | case INTERFACE_NAMELESS: | |
2952 | goto syntax; | |
2953 | ||
2954 | case INTERFACE_GENERIC: | |
2955 | if (gfc_get_symbol (name, NULL, &sym)) | |
2956 | goto done; | |
2957 | ||
2958 | if (gfc_add_access (&sym->attr, | |
2959 | (st == | |
2960 | ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
950683ed | 2961 | sym->name, NULL) == FAILURE) |
4ee9c684 | 2962 | return MATCH_ERROR; |
2963 | ||
2964 | break; | |
2965 | ||
2966 | case INTERFACE_INTRINSIC_OP: | |
2967 | if (gfc_current_ns->operator_access[operator] == ACCESS_UNKNOWN) | |
2968 | { | |
2969 | gfc_current_ns->operator_access[operator] = | |
2970 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
2971 | } | |
2972 | else | |
2973 | { | |
2974 | gfc_error ("Access specification of the %s operator at %C has " | |
2975 | "already been specified", gfc_op2string (operator)); | |
2976 | goto done; | |
2977 | } | |
2978 | ||
2979 | break; | |
2980 | ||
2981 | case INTERFACE_USER_OP: | |
2982 | uop = gfc_get_uop (name); | |
2983 | ||
2984 | if (uop->access == ACCESS_UNKNOWN) | |
2985 | { | |
2986 | uop->access = | |
2987 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
2988 | } | |
2989 | else | |
2990 | { | |
2991 | gfc_error | |
2992 | ("Access specification of the .%s. operator at %C has " | |
2993 | "already been specified", sym->name); | |
2994 | goto done; | |
2995 | } | |
2996 | ||
2997 | break; | |
2998 | } | |
2999 | ||
3000 | if (gfc_match_char (',') == MATCH_NO) | |
3001 | break; | |
3002 | } | |
3003 | ||
3004 | if (gfc_match_eos () != MATCH_YES) | |
3005 | goto syntax; | |
3006 | return MATCH_YES; | |
3007 | ||
3008 | syntax: | |
3009 | gfc_syntax_error (st); | |
3010 | ||
3011 | done: | |
3012 | return MATCH_ERROR; | |
3013 | } | |
3014 | ||
3015 | ||
3016 | /* The PRIVATE statement is a bit weird in that it can be a attribute | |
3017 | declaration, but also works as a standlone statement inside of a | |
3018 | type declaration or a module. */ | |
3019 | ||
3020 | match | |
3021 | gfc_match_private (gfc_statement * st) | |
3022 | { | |
3023 | ||
3024 | if (gfc_match ("private") != MATCH_YES) | |
3025 | return MATCH_NO; | |
3026 | ||
3027 | if (gfc_current_state () == COMP_DERIVED) | |
3028 | { | |
3029 | if (gfc_match_eos () == MATCH_YES) | |
3030 | { | |
3031 | *st = ST_PRIVATE; | |
3032 | return MATCH_YES; | |
3033 | } | |
3034 | ||
3035 | gfc_syntax_error (ST_PRIVATE); | |
3036 | return MATCH_ERROR; | |
3037 | } | |
3038 | ||
3039 | if (gfc_match_eos () == MATCH_YES) | |
3040 | { | |
3041 | *st = ST_PRIVATE; | |
3042 | return MATCH_YES; | |
3043 | } | |
3044 | ||
3045 | *st = ST_ATTR_DECL; | |
3046 | return access_attr_decl (ST_PRIVATE); | |
3047 | } | |
3048 | ||
3049 | ||
3050 | match | |
3051 | gfc_match_public (gfc_statement * st) | |
3052 | { | |
3053 | ||
3054 | if (gfc_match ("public") != MATCH_YES) | |
3055 | return MATCH_NO; | |
3056 | ||
3057 | if (gfc_match_eos () == MATCH_YES) | |
3058 | { | |
3059 | *st = ST_PUBLIC; | |
3060 | return MATCH_YES; | |
3061 | } | |
3062 | ||
3063 | *st = ST_ATTR_DECL; | |
3064 | return access_attr_decl (ST_PUBLIC); | |
3065 | } | |
3066 | ||
3067 | ||
3068 | /* Workhorse for gfc_match_parameter. */ | |
3069 | ||
3070 | static match | |
3071 | do_parm (void) | |
3072 | { | |
3073 | gfc_symbol *sym; | |
3074 | gfc_expr *init; | |
3075 | match m; | |
3076 | ||
3077 | m = gfc_match_symbol (&sym, 0); | |
3078 | if (m == MATCH_NO) | |
3079 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
3080 | ||
3081 | if (m != MATCH_YES) | |
3082 | return m; | |
3083 | ||
3084 | if (gfc_match_char ('=') == MATCH_NO) | |
3085 | { | |
3086 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
3087 | return MATCH_ERROR; | |
3088 | } | |
3089 | ||
3090 | m = gfc_match_init_expr (&init); | |
3091 | if (m == MATCH_NO) | |
3092 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
3093 | if (m != MATCH_YES) | |
3094 | return m; | |
3095 | ||
3096 | if (sym->ts.type == BT_UNKNOWN | |
3097 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
3098 | { | |
3099 | m = MATCH_ERROR; | |
3100 | goto cleanup; | |
3101 | } | |
3102 | ||
3103 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
950683ed | 3104 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
4ee9c684 | 3105 | { |
3106 | m = MATCH_ERROR; | |
3107 | goto cleanup; | |
3108 | } | |
3109 | ||
c1b6da4a | 3110 | if (sym->ts.type == BT_CHARACTER |
3111 | && sym->ts.cl != NULL | |
3112 | && sym->ts.cl->length != NULL | |
3113 | && sym->ts.cl->length->expr_type == EXPR_CONSTANT | |
3114 | && init->expr_type == EXPR_CONSTANT | |
3115 | && init->ts.type == BT_CHARACTER | |
3116 | && init->ts.kind == 1) | |
3117 | gfc_set_constant_character_len ( | |
3118 | mpz_get_si (sym->ts.cl->length->value.integer), init); | |
3119 | ||
4ee9c684 | 3120 | sym->value = init; |
3121 | return MATCH_YES; | |
3122 | ||
3123 | cleanup: | |
3124 | gfc_free_expr (init); | |
3125 | return m; | |
3126 | } | |
3127 | ||
3128 | ||
3129 | /* Match a parameter statement, with the weird syntax that these have. */ | |
3130 | ||
3131 | match | |
3132 | gfc_match_parameter (void) | |
3133 | { | |
3134 | match m; | |
3135 | ||
3136 | if (gfc_match_char ('(') == MATCH_NO) | |
3137 | return MATCH_NO; | |
3138 | ||
3139 | for (;;) | |
3140 | { | |
3141 | m = do_parm (); | |
3142 | if (m != MATCH_YES) | |
3143 | break; | |
3144 | ||
3145 | if (gfc_match (" )%t") == MATCH_YES) | |
3146 | break; | |
3147 | ||
3148 | if (gfc_match_char (',') != MATCH_YES) | |
3149 | { | |
3150 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
3151 | m = MATCH_ERROR; | |
3152 | break; | |
3153 | } | |
3154 | } | |
3155 | ||
3156 | return m; | |
3157 | } | |
3158 | ||
3159 | ||
3160 | /* Save statements have a special syntax. */ | |
3161 | ||
3162 | match | |
3163 | gfc_match_save (void) | |
3164 | { | |
82f5ee13 | 3165 | char n[GFC_MAX_SYMBOL_LEN+1]; |
3166 | gfc_common_head *c; | |
4ee9c684 | 3167 | gfc_symbol *sym; |
3168 | match m; | |
3169 | ||
3170 | if (gfc_match_eos () == MATCH_YES) | |
3171 | { | |
3172 | if (gfc_current_ns->seen_save) | |
3173 | { | |
3174 | gfc_error ("Blanket SAVE statement at %C follows previous " | |
3175 | "SAVE statement"); | |
3176 | ||
3177 | return MATCH_ERROR; | |
3178 | } | |
3179 | ||
3180 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
3181 | return MATCH_YES; | |
3182 | } | |
3183 | ||
3184 | if (gfc_current_ns->save_all) | |
3185 | { | |
3186 | gfc_error ("SAVE statement at %C follows blanket SAVE statement"); | |
3187 | return MATCH_ERROR; | |
3188 | } | |
3189 | ||
3190 | gfc_match (" ::"); | |
3191 | ||
3192 | for (;;) | |
3193 | { | |
3194 | m = gfc_match_symbol (&sym, 0); | |
3195 | switch (m) | |
3196 | { | |
3197 | case MATCH_YES: | |
950683ed | 3198 | if (gfc_add_save (&sym->attr, sym->name, |
3199 | &gfc_current_locus) == FAILURE) | |
4ee9c684 | 3200 | return MATCH_ERROR; |
3201 | goto next_item; | |
3202 | ||
3203 | case MATCH_NO: | |
3204 | break; | |
3205 | ||
3206 | case MATCH_ERROR: | |
3207 | return MATCH_ERROR; | |
3208 | } | |
3209 | ||
82f5ee13 | 3210 | m = gfc_match (" / %n /", &n); |
4ee9c684 | 3211 | if (m == MATCH_ERROR) |
3212 | return MATCH_ERROR; | |
3213 | if (m == MATCH_NO) | |
3214 | goto syntax; | |
3215 | ||
403ddc45 | 3216 | c = gfc_get_common (n, 0); |
82f5ee13 | 3217 | c->saved = 1; |
3218 | ||
4ee9c684 | 3219 | gfc_current_ns->seen_save = 1; |
3220 | ||
3221 | next_item: | |
3222 | if (gfc_match_eos () == MATCH_YES) | |
3223 | break; | |
3224 | if (gfc_match_char (',') != MATCH_YES) | |
3225 | goto syntax; | |
3226 | } | |
3227 | ||
3228 | return MATCH_YES; | |
3229 | ||
3230 | syntax: | |
3231 | gfc_error ("Syntax error in SAVE statement at %C"); | |
3232 | return MATCH_ERROR; | |
3233 | } | |
3234 | ||
3235 | ||
3236 | /* Match a module procedure statement. Note that we have to modify | |
3237 | symbols in the parent's namespace because the current one was there | |
89d91d02 | 3238 | to receive symbols that are in an interface's formal argument list. */ |
4ee9c684 | 3239 | |
3240 | match | |
3241 | gfc_match_modproc (void) | |
3242 | { | |
3243 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3244 | gfc_symbol *sym; | |
3245 | match m; | |
3246 | ||
3247 | if (gfc_state_stack->state != COMP_INTERFACE | |
3248 | || gfc_state_stack->previous == NULL | |
3249 | || current_interface.type == INTERFACE_NAMELESS) | |
3250 | { | |
3251 | gfc_error | |
3252 | ("MODULE PROCEDURE at %C must be in a generic module interface"); | |
3253 | return MATCH_ERROR; | |
3254 | } | |
3255 | ||
3256 | for (;;) | |
3257 | { | |
3258 | m = gfc_match_name (name); | |
3259 | if (m == MATCH_NO) | |
3260 | goto syntax; | |
3261 | if (m != MATCH_YES) | |
3262 | return MATCH_ERROR; | |
3263 | ||
3264 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
3265 | return MATCH_ERROR; | |
3266 | ||
3267 | if (sym->attr.proc != PROC_MODULE | |
950683ed | 3268 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
3269 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 3270 | return MATCH_ERROR; |
3271 | ||
3272 | if (gfc_add_interface (sym) == FAILURE) | |
3273 | return MATCH_ERROR; | |
3274 | ||
3275 | if (gfc_match_eos () == MATCH_YES) | |
3276 | break; | |
3277 | if (gfc_match_char (',') != MATCH_YES) | |
3278 | goto syntax; | |
3279 | } | |
3280 | ||
3281 | return MATCH_YES; | |
3282 | ||
3283 | syntax: | |
3284 | gfc_syntax_error (ST_MODULE_PROC); | |
3285 | return MATCH_ERROR; | |
3286 | } | |
3287 | ||
3288 | ||
3289 | /* Match the beginning of a derived type declaration. If a type name | |
3290 | was the result of a function, then it is possible to have a symbol | |
3291 | already to be known as a derived type yet have no components. */ | |
3292 | ||
3293 | match | |
3294 | gfc_match_derived_decl (void) | |
3295 | { | |
3296 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3297 | symbol_attribute attr; | |
3298 | gfc_symbol *sym; | |
3299 | match m; | |
3300 | ||
3301 | if (gfc_current_state () == COMP_DERIVED) | |
3302 | return MATCH_NO; | |
3303 | ||
3304 | gfc_clear_attr (&attr); | |
3305 | ||
3306 | loop: | |
3307 | if (gfc_match (" , private") == MATCH_YES) | |
3308 | { | |
3309 | if (gfc_find_state (COMP_MODULE) == FAILURE) | |
3310 | { | |
3311 | gfc_error | |
3312 | ("Derived type at %C can only be PRIVATE within a MODULE"); | |
3313 | return MATCH_ERROR; | |
3314 | } | |
3315 | ||
950683ed | 3316 | if (gfc_add_access (&attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
4ee9c684 | 3317 | return MATCH_ERROR; |
3318 | goto loop; | |
3319 | } | |
3320 | ||
3321 | if (gfc_match (" , public") == MATCH_YES) | |
3322 | { | |
3323 | if (gfc_find_state (COMP_MODULE) == FAILURE) | |
3324 | { | |
3325 | gfc_error ("Derived type at %C can only be PUBLIC within a MODULE"); | |
3326 | return MATCH_ERROR; | |
3327 | } | |
3328 | ||
950683ed | 3329 | if (gfc_add_access (&attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
4ee9c684 | 3330 | return MATCH_ERROR; |
3331 | goto loop; | |
3332 | } | |
3333 | ||
3334 | if (gfc_match (" ::") != MATCH_YES && attr.access != ACCESS_UNKNOWN) | |
3335 | { | |
3336 | gfc_error ("Expected :: in TYPE definition at %C"); | |
3337 | return MATCH_ERROR; | |
3338 | } | |
3339 | ||
3340 | m = gfc_match (" %n%t", name); | |
3341 | if (m != MATCH_YES) | |
3342 | return m; | |
3343 | ||
3344 | /* Make sure the name isn't the name of an intrinsic type. The | |
3345 | 'double precision' type doesn't get past the name matcher. */ | |
3346 | if (strcmp (name, "integer") == 0 | |
3347 | || strcmp (name, "real") == 0 | |
3348 | || strcmp (name, "character") == 0 | |
3349 | || strcmp (name, "logical") == 0 | |
3350 | || strcmp (name, "complex") == 0) | |
3351 | { | |
3352 | gfc_error | |
3353 | ("Type name '%s' at %C cannot be the same as an intrinsic type", | |
3354 | name); | |
3355 | return MATCH_ERROR; | |
3356 | } | |
3357 | ||
3358 | if (gfc_get_symbol (name, NULL, &sym)) | |
3359 | return MATCH_ERROR; | |
3360 | ||
3361 | if (sym->ts.type != BT_UNKNOWN) | |
3362 | { | |
3363 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
3364 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
3365 | return MATCH_ERROR; | |
3366 | } | |
3367 | ||
3368 | /* The symbol may already have the derived attribute without the | |
3369 | components. The ways this can happen is via a function | |
3370 | definition, an INTRINSIC statement or a subtype in another | |
3371 | derived type that is a pointer. The first part of the AND clause | |
b14e2757 | 3372 | is true if a the symbol is not the return value of a function. */ |
4ee9c684 | 3373 | if (sym->attr.flavor != FL_DERIVED |
950683ed | 3374 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 3375 | return MATCH_ERROR; |
3376 | ||
3377 | if (sym->components != NULL) | |
3378 | { | |
3379 | gfc_error | |
3380 | ("Derived type definition of '%s' at %C has already been defined", | |
3381 | sym->name); | |
3382 | return MATCH_ERROR; | |
3383 | } | |
3384 | ||
3385 | if (attr.access != ACCESS_UNKNOWN | |
950683ed | 3386 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
4ee9c684 | 3387 | return MATCH_ERROR; |
3388 | ||
3389 | gfc_new_block = sym; | |
3390 | ||
3391 | return MATCH_YES; | |
3392 | } |