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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 | { | |
ea13b9b7 | 749 | /* If there are multiple CHARACTER variables declared on |
750 | the same line, we don't want them to share the same | |
751 | length. */ | |
752 | sym->ts.cl = gfc_get_charlen (); | |
753 | sym->ts.cl->next = gfc_current_ns->cl_list; | |
754 | gfc_current_ns->cl_list = sym->ts.cl; | |
755 | ||
a270dc8e | 756 | if (init->expr_type == EXPR_CONSTANT) |
757 | sym->ts.cl->length = | |
758 | gfc_int_expr (init->value.character.length); | |
759 | else if (init->expr_type == EXPR_ARRAY) | |
760 | sym->ts.cl->length = gfc_copy_expr (init->ts.cl->length); | |
761 | } | |
762 | /* Update initializer character length according symbol. */ | |
763 | else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT) | |
764 | { | |
765 | int len = mpz_get_si (sym->ts.cl->length->value.integer); | |
766 | gfc_constructor * p; | |
767 | ||
768 | if (init->expr_type == EXPR_CONSTANT) | |
769 | gfc_set_constant_character_len (len, init); | |
770 | else if (init->expr_type == EXPR_ARRAY) | |
771 | { | |
772 | gfc_free_expr (init->ts.cl->length); | |
773 | init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length); | |
774 | for (p = init->value.constructor; p; p = p->next) | |
775 | gfc_set_constant_character_len (len, p->expr); | |
776 | } | |
777 | } | |
778 | } | |
779 | ||
4ee9c684 | 780 | /* Add initializer. Make sure we keep the ranks sane. */ |
781 | if (sym->attr.dimension && init->rank == 0) | |
782 | init->rank = sym->as->rank; | |
783 | ||
784 | sym->value = init; | |
785 | *initp = NULL; | |
786 | } | |
787 | ||
788 | return SUCCESS; | |
789 | } | |
790 | ||
791 | ||
792 | /* Function called by variable_decl() that adds a name to a structure | |
793 | being built. */ | |
794 | ||
795 | static try | |
796 | build_struct (const char *name, gfc_charlen * cl, gfc_expr ** init, | |
797 | gfc_array_spec ** as) | |
798 | { | |
799 | gfc_component *c; | |
800 | ||
801 | /* If the current symbol is of the same derived type that we're | |
802 | constructing, it must have the pointer attribute. */ | |
803 | if (current_ts.type == BT_DERIVED | |
804 | && current_ts.derived == gfc_current_block () | |
805 | && current_attr.pointer == 0) | |
806 | { | |
807 | gfc_error ("Component at %C must have the POINTER attribute"); | |
808 | return FAILURE; | |
809 | } | |
810 | ||
811 | if (gfc_current_block ()->attr.pointer | |
812 | && (*as)->rank != 0) | |
813 | { | |
814 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
815 | { | |
816 | gfc_error ("Array component of structure at %C must have explicit " | |
817 | "or deferred shape"); | |
818 | return FAILURE; | |
819 | } | |
820 | } | |
821 | ||
822 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
823 | return FAILURE; | |
824 | ||
825 | c->ts = current_ts; | |
826 | c->ts.cl = cl; | |
827 | gfc_set_component_attr (c, ¤t_attr); | |
828 | ||
829 | c->initializer = *init; | |
830 | *init = NULL; | |
831 | ||
832 | c->as = *as; | |
833 | if (c->as != NULL) | |
834 | c->dimension = 1; | |
835 | *as = NULL; | |
836 | ||
837 | /* Check array components. */ | |
838 | if (!c->dimension) | |
839 | return SUCCESS; | |
840 | ||
841 | if (c->pointer) | |
842 | { | |
843 | if (c->as->type != AS_DEFERRED) | |
844 | { | |
845 | gfc_error ("Pointer array component of structure at %C " | |
846 | "must have a deferred shape"); | |
847 | return FAILURE; | |
848 | } | |
849 | } | |
850 | else | |
851 | { | |
852 | if (c->as->type != AS_EXPLICIT) | |
853 | { | |
854 | gfc_error | |
855 | ("Array component of structure at %C must have an explicit " | |
856 | "shape"); | |
857 | return FAILURE; | |
858 | } | |
859 | } | |
860 | ||
861 | return SUCCESS; | |
862 | } | |
863 | ||
864 | ||
865 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
866 | ||
867 | match | |
868 | gfc_match_null (gfc_expr ** result) | |
869 | { | |
870 | gfc_symbol *sym; | |
871 | gfc_expr *e; | |
872 | match m; | |
873 | ||
874 | m = gfc_match (" null ( )"); | |
875 | if (m != MATCH_YES) | |
876 | return m; | |
877 | ||
878 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
879 | if (gfc_get_symbol ("null", NULL, &sym)) | |
880 | { | |
881 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
882 | return MATCH_ERROR; | |
883 | } | |
884 | ||
885 | gfc_intrinsic_symbol (sym); | |
886 | ||
887 | if (sym->attr.proc != PROC_INTRINSIC | |
950683ed | 888 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
889 | sym->name, NULL) == FAILURE | |
890 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
4ee9c684 | 891 | return MATCH_ERROR; |
892 | ||
893 | e = gfc_get_expr (); | |
cbb9e6aa | 894 | e->where = gfc_current_locus; |
4ee9c684 | 895 | e->expr_type = EXPR_NULL; |
896 | e->ts.type = BT_UNKNOWN; | |
897 | ||
898 | *result = e; | |
899 | ||
900 | return MATCH_YES; | |
901 | } | |
902 | ||
903 | ||
4ee9c684 | 904 | /* Match a variable name with an optional initializer. When this |
905 | subroutine is called, a variable is expected to be parsed next. | |
906 | Depending on what is happening at the moment, updates either the | |
907 | symbol table or the current interface. */ | |
908 | ||
909 | static match | |
3923b69f | 910 | variable_decl (int elem) |
4ee9c684 | 911 | { |
912 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
913 | gfc_expr *initializer, *char_len; | |
914 | gfc_array_spec *as; | |
915 | gfc_charlen *cl; | |
916 | locus var_locus; | |
917 | match m; | |
918 | try t; | |
919 | ||
920 | initializer = NULL; | |
921 | as = NULL; | |
922 | ||
923 | /* When we get here, we've just matched a list of attributes and | |
924 | maybe a type and a double colon. The next thing we expect to see | |
925 | is the name of the symbol. */ | |
926 | m = gfc_match_name (name); | |
927 | if (m != MATCH_YES) | |
928 | goto cleanup; | |
929 | ||
cbb9e6aa | 930 | var_locus = gfc_current_locus; |
4ee9c684 | 931 | |
932 | /* Now we could see the optional array spec. or character length. */ | |
933 | m = gfc_match_array_spec (&as); | |
934 | if (m == MATCH_ERROR) | |
935 | goto cleanup; | |
936 | if (m == MATCH_NO) | |
937 | as = gfc_copy_array_spec (current_as); | |
938 | ||
939 | char_len = NULL; | |
940 | cl = NULL; | |
941 | ||
942 | if (current_ts.type == BT_CHARACTER) | |
943 | { | |
944 | switch (match_char_length (&char_len)) | |
945 | { | |
946 | case MATCH_YES: | |
947 | cl = gfc_get_charlen (); | |
948 | cl->next = gfc_current_ns->cl_list; | |
949 | gfc_current_ns->cl_list = cl; | |
950 | ||
951 | cl->length = char_len; | |
952 | break; | |
953 | ||
3923b69f | 954 | /* Non-constant lengths need to be copied after the first |
955 | element. */ | |
4ee9c684 | 956 | case MATCH_NO: |
3923b69f | 957 | if (elem > 1 && current_ts.cl->length |
958 | && current_ts.cl->length->expr_type != EXPR_CONSTANT) | |
959 | { | |
960 | cl = gfc_get_charlen (); | |
961 | cl->next = gfc_current_ns->cl_list; | |
962 | gfc_current_ns->cl_list = cl; | |
963 | cl->length = gfc_copy_expr (current_ts.cl->length); | |
964 | } | |
965 | else | |
966 | cl = current_ts.cl; | |
967 | ||
4ee9c684 | 968 | break; |
969 | ||
970 | case MATCH_ERROR: | |
971 | goto cleanup; | |
972 | } | |
973 | } | |
974 | ||
975 | /* OK, we've successfully matched the declaration. Now put the | |
976 | symbol in the current namespace, because it might be used in the | |
fe06c0d5 | 977 | optional initialization expression for this symbol, e.g. this is |
4ee9c684 | 978 | perfectly legal: |
979 | ||
980 | integer, parameter :: i = huge(i) | |
981 | ||
982 | This is only true for parameters or variables of a basic type. | |
983 | For components of derived types, it is not true, so we don't | |
984 | create a symbol for those yet. If we fail to create the symbol, | |
985 | bail out. */ | |
986 | if (gfc_current_state () != COMP_DERIVED | |
987 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
988 | { | |
989 | m = MATCH_ERROR; | |
990 | goto cleanup; | |
991 | } | |
992 | ||
993 | /* In functions that have a RESULT variable defined, the function | |
994 | name always refers to function calls. Therefore, the name is | |
995 | not allowed to appear in specification statements. */ | |
996 | if (gfc_current_state () == COMP_FUNCTION | |
997 | && gfc_current_block () != NULL | |
998 | && gfc_current_block ()->result != NULL | |
999 | && gfc_current_block ()->result != gfc_current_block () | |
1000 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1001 | { | |
1002 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1003 | m = MATCH_ERROR; | |
1004 | goto cleanup; | |
1005 | } | |
1006 | ||
b4f45d02 | 1007 | /* We allow old-style initializations of the form |
1008 | integer i /2/, j(4) /3*3, 1/ | |
1009 | (if no colon has been seen). These are different from data | |
1010 | statements in that initializers are only allowed to apply to the | |
1011 | variable immediately preceding, i.e. | |
1012 | integer i, j /1, 2/ | |
1013 | is not allowed. Therefore we have to do some work manually, that | |
cca3db55 | 1014 | could otherwise be left to the matchers for DATA statements. */ |
b4f45d02 | 1015 | |
1016 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1017 | { | |
1018 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1019 | "initialization at %C") == FAILURE) | |
1020 | return MATCH_ERROR; | |
1021 | ||
1022 | return match_old_style_init (name); | |
1023 | } | |
1024 | ||
4ee9c684 | 1025 | /* The double colon must be present in order to have initializers. |
1026 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1027 | if (colon_seen) | |
1028 | { | |
1029 | if (gfc_match (" =>") == MATCH_YES) | |
1030 | { | |
1031 | ||
1032 | if (!current_attr.pointer) | |
1033 | { | |
1034 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1035 | m = MATCH_ERROR; | |
1036 | goto cleanup; | |
1037 | } | |
1038 | ||
1039 | m = gfc_match_null (&initializer); | |
1040 | if (m == MATCH_NO) | |
1041 | { | |
1042 | gfc_error ("Pointer initialization requires a NULL at %C"); | |
1043 | m = MATCH_ERROR; | |
1044 | } | |
1045 | ||
1046 | if (gfc_pure (NULL)) | |
1047 | { | |
1048 | gfc_error | |
1049 | ("Initialization of pointer at %C is not allowed in a " | |
1050 | "PURE procedure"); | |
1051 | m = MATCH_ERROR; | |
1052 | } | |
1053 | ||
1054 | if (m != MATCH_YES) | |
1055 | goto cleanup; | |
1056 | ||
1057 | initializer->ts = current_ts; | |
1058 | ||
1059 | } | |
1060 | else if (gfc_match_char ('=') == MATCH_YES) | |
1061 | { | |
1062 | if (current_attr.pointer) | |
1063 | { | |
1064 | gfc_error | |
1065 | ("Pointer initialization at %C requires '=>', not '='"); | |
1066 | m = MATCH_ERROR; | |
1067 | goto cleanup; | |
1068 | } | |
1069 | ||
1070 | m = gfc_match_init_expr (&initializer); | |
1071 | if (m == MATCH_NO) | |
1072 | { | |
1073 | gfc_error ("Expected an initialization expression at %C"); | |
1074 | m = MATCH_ERROR; | |
1075 | } | |
1076 | ||
1077 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1078 | { | |
1079 | gfc_error | |
1080 | ("Initialization of variable at %C is not allowed in a " | |
1081 | "PURE procedure"); | |
1082 | m = MATCH_ERROR; | |
1083 | } | |
1084 | ||
1085 | if (m != MATCH_YES) | |
1086 | goto cleanup; | |
1087 | } | |
8ffad0f9 | 1088 | } |
1089 | ||
d9b3f26b | 1090 | /* Add the initializer. Note that it is fine if initializer is |
4ee9c684 | 1091 | NULL here, because we sometimes also need to check if a |
1092 | declaration *must* have an initialization expression. */ | |
1093 | if (gfc_current_state () != COMP_DERIVED) | |
1094 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1095 | else | |
d9b3f26b | 1096 | { |
8b3eabe1 | 1097 | if (current_ts.type == BT_DERIVED && !current_attr.pointer && !initializer) |
d9b3f26b | 1098 | initializer = gfc_default_initializer (¤t_ts); |
1099 | t = build_struct (name, cl, &initializer, &as); | |
1100 | } | |
4ee9c684 | 1101 | |
1102 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1103 | ||
1104 | cleanup: | |
1105 | /* Free stuff up and return. */ | |
1106 | gfc_free_expr (initializer); | |
1107 | gfc_free_array_spec (as); | |
1108 | ||
1109 | return m; | |
1110 | } | |
1111 | ||
1112 | ||
1113 | /* Match an extended-f77 kind specification. */ | |
1114 | ||
1115 | match | |
1116 | gfc_match_old_kind_spec (gfc_typespec * ts) | |
1117 | { | |
1118 | match m; | |
1119 | ||
1120 | if (gfc_match_char ('*') != MATCH_YES) | |
1121 | return MATCH_NO; | |
1122 | ||
1123 | m = gfc_match_small_literal_int (&ts->kind); | |
1124 | if (m != MATCH_YES) | |
1125 | return MATCH_ERROR; | |
1126 | ||
1127 | /* Massage the kind numbers for complex types. */ | |
1128 | if (ts->type == BT_COMPLEX && ts->kind == 8) | |
1129 | ts->kind = 4; | |
1130 | if (ts->type == BT_COMPLEX && ts->kind == 16) | |
1131 | ts->kind = 8; | |
1132 | ||
f2d4ef3b | 1133 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1134 | { |
1135 | gfc_error ("Old-style kind %d not supported for type %s at %C", | |
1136 | ts->kind, gfc_basic_typename (ts->type)); | |
1137 | ||
1138 | return MATCH_ERROR; | |
1139 | } | |
1140 | ||
1141 | return MATCH_YES; | |
1142 | } | |
1143 | ||
1144 | ||
1145 | /* Match a kind specification. Since kinds are generally optional, we | |
1146 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1147 | string is found, then we know we have an error. */ | |
1148 | ||
1149 | match | |
1150 | gfc_match_kind_spec (gfc_typespec * ts) | |
1151 | { | |
1152 | locus where; | |
1153 | gfc_expr *e; | |
1154 | match m, n; | |
1155 | const char *msg; | |
1156 | ||
1157 | m = MATCH_NO; | |
1158 | e = NULL; | |
1159 | ||
cbb9e6aa | 1160 | where = gfc_current_locus; |
4ee9c684 | 1161 | |
1162 | if (gfc_match_char ('(') == MATCH_NO) | |
1163 | return MATCH_NO; | |
1164 | ||
1165 | /* Also gobbles optional text. */ | |
1166 | if (gfc_match (" kind = ") == MATCH_YES) | |
1167 | m = MATCH_ERROR; | |
1168 | ||
1169 | n = gfc_match_init_expr (&e); | |
1170 | if (n == MATCH_NO) | |
1171 | gfc_error ("Expected initialization expression at %C"); | |
1172 | if (n != MATCH_YES) | |
1173 | return MATCH_ERROR; | |
1174 | ||
1175 | if (e->rank != 0) | |
1176 | { | |
1177 | gfc_error ("Expected scalar initialization expression at %C"); | |
1178 | m = MATCH_ERROR; | |
1179 | goto no_match; | |
1180 | } | |
1181 | ||
1182 | msg = gfc_extract_int (e, &ts->kind); | |
1183 | if (msg != NULL) | |
1184 | { | |
1185 | gfc_error (msg); | |
1186 | m = MATCH_ERROR; | |
1187 | goto no_match; | |
1188 | } | |
1189 | ||
1190 | gfc_free_expr (e); | |
1191 | e = NULL; | |
1192 | ||
f2d4ef3b | 1193 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1194 | { |
1195 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
1196 | gfc_basic_typename (ts->type)); | |
1197 | ||
1198 | m = MATCH_ERROR; | |
1199 | goto no_match; | |
1200 | } | |
1201 | ||
1202 | if (gfc_match_char (')') != MATCH_YES) | |
1203 | { | |
1204 | gfc_error ("Missing right paren at %C"); | |
1205 | goto no_match; | |
1206 | } | |
1207 | ||
1208 | return MATCH_YES; | |
1209 | ||
1210 | no_match: | |
1211 | gfc_free_expr (e); | |
cbb9e6aa | 1212 | gfc_current_locus = where; |
4ee9c684 | 1213 | return m; |
1214 | } | |
1215 | ||
1216 | ||
1217 | /* Match the various kind/length specifications in a CHARACTER | |
1218 | declaration. We don't return MATCH_NO. */ | |
1219 | ||
1220 | static match | |
1221 | match_char_spec (gfc_typespec * ts) | |
1222 | { | |
1223 | int i, kind, seen_length; | |
1224 | gfc_charlen *cl; | |
1225 | gfc_expr *len; | |
1226 | match m; | |
1227 | ||
b8a891cb | 1228 | kind = gfc_default_character_kind; |
4ee9c684 | 1229 | len = NULL; |
1230 | seen_length = 0; | |
1231 | ||
1232 | /* Try the old-style specification first. */ | |
1233 | old_char_selector = 0; | |
1234 | ||
1235 | m = match_char_length (&len); | |
1236 | if (m != MATCH_NO) | |
1237 | { | |
1238 | if (m == MATCH_YES) | |
1239 | old_char_selector = 1; | |
1240 | seen_length = 1; | |
1241 | goto done; | |
1242 | } | |
1243 | ||
1244 | m = gfc_match_char ('('); | |
1245 | if (m != MATCH_YES) | |
1246 | { | |
1247 | m = MATCH_YES; /* character without length is a single char */ | |
1248 | goto done; | |
1249 | } | |
1250 | ||
1251 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ) */ | |
1252 | if (gfc_match (" kind =") == MATCH_YES) | |
1253 | { | |
1254 | m = gfc_match_small_int (&kind); | |
1255 | if (m == MATCH_ERROR) | |
1256 | goto done; | |
1257 | if (m == MATCH_NO) | |
1258 | goto syntax; | |
1259 | ||
1260 | if (gfc_match (" , len =") == MATCH_NO) | |
1261 | goto rparen; | |
1262 | ||
1263 | m = char_len_param_value (&len); | |
1264 | if (m == MATCH_NO) | |
1265 | goto syntax; | |
1266 | if (m == MATCH_ERROR) | |
1267 | goto done; | |
1268 | seen_length = 1; | |
1269 | ||
1270 | goto rparen; | |
1271 | } | |
1272 | ||
1273 | /* Try to match ( LEN = <len-param> ) or ( LEN = <len-param>, KIND = <int> ) */ | |
1274 | if (gfc_match (" len =") == MATCH_YES) | |
1275 | { | |
1276 | m = char_len_param_value (&len); | |
1277 | if (m == MATCH_NO) | |
1278 | goto syntax; | |
1279 | if (m == MATCH_ERROR) | |
1280 | goto done; | |
1281 | seen_length = 1; | |
1282 | ||
1283 | if (gfc_match_char (')') == MATCH_YES) | |
1284 | goto done; | |
1285 | ||
1286 | if (gfc_match (" , kind =") != MATCH_YES) | |
1287 | goto syntax; | |
1288 | ||
1289 | gfc_match_small_int (&kind); | |
1290 | ||
f2d4ef3b | 1291 | if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
4ee9c684 | 1292 | { |
1293 | gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); | |
1294 | return MATCH_YES; | |
1295 | } | |
1296 | ||
1297 | goto rparen; | |
1298 | } | |
1299 | ||
1300 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ) */ | |
1301 | m = char_len_param_value (&len); | |
1302 | if (m == MATCH_NO) | |
1303 | goto syntax; | |
1304 | if (m == MATCH_ERROR) | |
1305 | goto done; | |
1306 | seen_length = 1; | |
1307 | ||
1308 | m = gfc_match_char (')'); | |
1309 | if (m == MATCH_YES) | |
1310 | goto done; | |
1311 | ||
1312 | if (gfc_match_char (',') != MATCH_YES) | |
1313 | goto syntax; | |
1314 | ||
1315 | gfc_match (" kind ="); /* Gobble optional text */ | |
1316 | ||
1317 | m = gfc_match_small_int (&kind); | |
1318 | if (m == MATCH_ERROR) | |
1319 | goto done; | |
1320 | if (m == MATCH_NO) | |
1321 | goto syntax; | |
1322 | ||
1323 | rparen: | |
1324 | /* Require a right-paren at this point. */ | |
1325 | m = gfc_match_char (')'); | |
1326 | if (m == MATCH_YES) | |
1327 | goto done; | |
1328 | ||
1329 | syntax: | |
1330 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
1331 | m = MATCH_ERROR; | |
1332 | ||
1333 | done: | |
f2d4ef3b | 1334 | if (m == MATCH_YES && gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
4ee9c684 | 1335 | { |
1336 | gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); | |
1337 | m = MATCH_ERROR; | |
1338 | } | |
1339 | ||
1340 | if (m != MATCH_YES) | |
1341 | { | |
1342 | gfc_free_expr (len); | |
1343 | return m; | |
1344 | } | |
1345 | ||
1346 | /* Do some final massaging of the length values. */ | |
1347 | cl = gfc_get_charlen (); | |
1348 | cl->next = gfc_current_ns->cl_list; | |
1349 | gfc_current_ns->cl_list = cl; | |
1350 | ||
1351 | if (seen_length == 0) | |
1352 | cl->length = gfc_int_expr (1); | |
1353 | else | |
1354 | { | |
1355 | if (len == NULL || gfc_extract_int (len, &i) != NULL || i >= 0) | |
1356 | cl->length = len; | |
1357 | else | |
1358 | { | |
1359 | gfc_free_expr (len); | |
1360 | cl->length = gfc_int_expr (0); | |
1361 | } | |
1362 | } | |
1363 | ||
1364 | ts->cl = cl; | |
1365 | ts->kind = kind; | |
1366 | ||
1367 | return MATCH_YES; | |
1368 | } | |
1369 | ||
1370 | ||
1371 | /* Matches a type specification. If successful, sets the ts structure | |
1372 | to the matched specification. This is necessary for FUNCTION and | |
1373 | IMPLICIT statements. | |
1374 | ||
39351103 | 1375 | If implicit_flag is nonzero, then we don't check for the optional |
1376 | kind specification. Not doing so is needed for matching an IMPLICIT | |
4ee9c684 | 1377 | statement correctly. */ |
1378 | ||
39351103 | 1379 | static match |
1380 | match_type_spec (gfc_typespec * ts, int implicit_flag) | |
4ee9c684 | 1381 | { |
1382 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1383 | gfc_symbol *sym; | |
1384 | match m; | |
18f3698a | 1385 | int c; |
4ee9c684 | 1386 | |
1387 | gfc_clear_ts (ts); | |
1388 | ||
1389 | if (gfc_match (" integer") == MATCH_YES) | |
1390 | { | |
1391 | ts->type = BT_INTEGER; | |
b8a891cb | 1392 | ts->kind = gfc_default_integer_kind; |
4ee9c684 | 1393 | goto get_kind; |
1394 | } | |
1395 | ||
1396 | if (gfc_match (" character") == MATCH_YES) | |
1397 | { | |
1398 | ts->type = BT_CHARACTER; | |
39351103 | 1399 | if (implicit_flag == 0) |
1400 | return match_char_spec (ts); | |
1401 | else | |
1402 | return MATCH_YES; | |
4ee9c684 | 1403 | } |
1404 | ||
1405 | if (gfc_match (" real") == MATCH_YES) | |
1406 | { | |
1407 | ts->type = BT_REAL; | |
b8a891cb | 1408 | ts->kind = gfc_default_real_kind; |
4ee9c684 | 1409 | goto get_kind; |
1410 | } | |
1411 | ||
1412 | if (gfc_match (" double precision") == MATCH_YES) | |
1413 | { | |
1414 | ts->type = BT_REAL; | |
b8a891cb | 1415 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 1416 | return MATCH_YES; |
1417 | } | |
1418 | ||
1419 | if (gfc_match (" complex") == MATCH_YES) | |
1420 | { | |
1421 | ts->type = BT_COMPLEX; | |
b8a891cb | 1422 | ts->kind = gfc_default_complex_kind; |
4ee9c684 | 1423 | goto get_kind; |
1424 | } | |
1425 | ||
1426 | if (gfc_match (" double complex") == MATCH_YES) | |
1427 | { | |
1428 | ts->type = BT_COMPLEX; | |
b8a891cb | 1429 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 1430 | return MATCH_YES; |
1431 | } | |
1432 | ||
1433 | if (gfc_match (" logical") == MATCH_YES) | |
1434 | { | |
1435 | ts->type = BT_LOGICAL; | |
b8a891cb | 1436 | ts->kind = gfc_default_logical_kind; |
4ee9c684 | 1437 | goto get_kind; |
1438 | } | |
1439 | ||
1440 | m = gfc_match (" type ( %n )", name); | |
1441 | if (m != MATCH_YES) | |
1442 | return m; | |
1443 | ||
1444 | /* Search for the name but allow the components to be defined later. */ | |
1445 | if (gfc_get_ha_symbol (name, &sym)) | |
1446 | { | |
1447 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
1448 | return MATCH_ERROR; | |
1449 | } | |
1450 | ||
1451 | if (sym->attr.flavor != FL_DERIVED | |
950683ed | 1452 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 1453 | return MATCH_ERROR; |
1454 | ||
1455 | ts->type = BT_DERIVED; | |
1456 | ts->kind = 0; | |
1457 | ts->derived = sym; | |
1458 | ||
1459 | return MATCH_YES; | |
1460 | ||
1461 | get_kind: | |
1462 | /* For all types except double, derived and character, look for an | |
1463 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
39351103 | 1464 | if (implicit_flag == 1) |
4ee9c684 | 1465 | return MATCH_YES; |
1466 | ||
18f3698a | 1467 | if (gfc_current_form == FORM_FREE) |
1468 | { | |
1469 | c = gfc_peek_char(); | |
1470 | if (!gfc_is_whitespace(c) && c != '*' && c != '(' | |
1471 | && c != ':' && c != ',') | |
1472 | return MATCH_NO; | |
1473 | } | |
1474 | ||
4ee9c684 | 1475 | m = gfc_match_kind_spec (ts); |
1476 | if (m == MATCH_NO && ts->type != BT_CHARACTER) | |
1477 | m = gfc_match_old_kind_spec (ts); | |
1478 | ||
1479 | if (m == MATCH_NO) | |
1480 | m = MATCH_YES; /* No kind specifier found. */ | |
1481 | ||
1482 | return m; | |
1483 | } | |
1484 | ||
1485 | ||
39351103 | 1486 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
1487 | already matched in parse.c, or we would not end up here in the | |
1488 | first place. So the only thing we need to check, is if there is | |
1489 | trailing garbage. If not, the match is successful. */ | |
1490 | ||
1491 | match | |
1492 | gfc_match_implicit_none (void) | |
1493 | { | |
1494 | ||
1495 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; | |
1496 | } | |
1497 | ||
1498 | ||
1499 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
1500 | ||
1501 | static match | |
b70528c7 | 1502 | match_implicit_range (void) |
39351103 | 1503 | { |
1504 | int c, c1, c2, inner; | |
1505 | locus cur_loc; | |
1506 | ||
1507 | cur_loc = gfc_current_locus; | |
1508 | ||
1509 | gfc_gobble_whitespace (); | |
1510 | c = gfc_next_char (); | |
1511 | if (c != '(') | |
1512 | { | |
1513 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
1514 | goto bad; | |
1515 | } | |
1516 | ||
1517 | inner = 1; | |
1518 | while (inner) | |
1519 | { | |
1520 | gfc_gobble_whitespace (); | |
1521 | c1 = gfc_next_char (); | |
1522 | if (!ISALPHA (c1)) | |
1523 | goto bad; | |
1524 | ||
1525 | gfc_gobble_whitespace (); | |
1526 | c = gfc_next_char (); | |
1527 | ||
1528 | switch (c) | |
1529 | { | |
1530 | case ')': | |
1531 | inner = 0; /* Fall through */ | |
1532 | ||
1533 | case ',': | |
1534 | c2 = c1; | |
1535 | break; | |
1536 | ||
1537 | case '-': | |
1538 | gfc_gobble_whitespace (); | |
1539 | c2 = gfc_next_char (); | |
1540 | if (!ISALPHA (c2)) | |
1541 | goto bad; | |
1542 | ||
1543 | gfc_gobble_whitespace (); | |
1544 | c = gfc_next_char (); | |
1545 | ||
1546 | if ((c != ',') && (c != ')')) | |
1547 | goto bad; | |
1548 | if (c == ')') | |
1549 | inner = 0; | |
1550 | ||
1551 | break; | |
1552 | ||
1553 | default: | |
1554 | goto bad; | |
1555 | } | |
1556 | ||
1557 | if (c1 > c2) | |
1558 | { | |
1559 | gfc_error ("Letters must be in alphabetic order in " | |
1560 | "IMPLICIT statement at %C"); | |
1561 | goto bad; | |
1562 | } | |
1563 | ||
1564 | /* See if we can add the newly matched range to the pending | |
1565 | implicits from this IMPLICIT statement. We do not check for | |
1566 | conflicts with whatever earlier IMPLICIT statements may have | |
1567 | set. This is done when we've successfully finished matching | |
1568 | the current one. */ | |
b70528c7 | 1569 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
39351103 | 1570 | goto bad; |
1571 | } | |
1572 | ||
1573 | return MATCH_YES; | |
1574 | ||
1575 | bad: | |
1576 | gfc_syntax_error (ST_IMPLICIT); | |
1577 | ||
1578 | gfc_current_locus = cur_loc; | |
1579 | return MATCH_ERROR; | |
1580 | } | |
1581 | ||
1582 | ||
1583 | /* Match an IMPLICIT statement, storing the types for | |
1584 | gfc_set_implicit() if the statement is accepted by the parser. | |
1585 | There is a strange looking, but legal syntactic construction | |
1586 | possible. It looks like: | |
1587 | ||
1588 | IMPLICIT INTEGER (a-b) (c-d) | |
1589 | ||
1590 | This is legal if "a-b" is a constant expression that happens to | |
1591 | equal one of the legal kinds for integers. The real problem | |
1592 | happens with an implicit specification that looks like: | |
1593 | ||
1594 | IMPLICIT INTEGER (a-b) | |
1595 | ||
1596 | In this case, a typespec matcher that is "greedy" (as most of the | |
1597 | matchers are) gobbles the character range as a kindspec, leaving | |
1598 | nothing left. We therefore have to go a bit more slowly in the | |
1599 | matching process by inhibiting the kindspec checking during | |
1600 | typespec matching and checking for a kind later. */ | |
1601 | ||
1602 | match | |
1603 | gfc_match_implicit (void) | |
1604 | { | |
1605 | gfc_typespec ts; | |
1606 | locus cur_loc; | |
1607 | int c; | |
1608 | match m; | |
1609 | ||
1610 | /* We don't allow empty implicit statements. */ | |
1611 | if (gfc_match_eos () == MATCH_YES) | |
1612 | { | |
1613 | gfc_error ("Empty IMPLICIT statement at %C"); | |
1614 | return MATCH_ERROR; | |
1615 | } | |
1616 | ||
39351103 | 1617 | do |
1618 | { | |
b70528c7 | 1619 | /* First cleanup. */ |
1620 | gfc_clear_new_implicit (); | |
1621 | ||
39351103 | 1622 | /* A basic type is mandatory here. */ |
1623 | m = match_type_spec (&ts, 1); | |
1624 | if (m == MATCH_ERROR) | |
1625 | goto error; | |
1626 | if (m == MATCH_NO) | |
1627 | goto syntax; | |
1628 | ||
1629 | cur_loc = gfc_current_locus; | |
b70528c7 | 1630 | m = match_implicit_range (); |
39351103 | 1631 | |
1632 | if (m == MATCH_YES) | |
1633 | { | |
b70528c7 | 1634 | /* We may have <TYPE> (<RANGE>). */ |
39351103 | 1635 | gfc_gobble_whitespace (); |
1636 | c = gfc_next_char (); | |
1637 | if ((c == '\n') || (c == ',')) | |
b70528c7 | 1638 | { |
1639 | /* Check for CHARACTER with no length parameter. */ | |
1640 | if (ts.type == BT_CHARACTER && !ts.cl) | |
1641 | { | |
b8a891cb | 1642 | ts.kind = gfc_default_character_kind; |
b70528c7 | 1643 | ts.cl = gfc_get_charlen (); |
1644 | ts.cl->next = gfc_current_ns->cl_list; | |
1645 | gfc_current_ns->cl_list = ts.cl; | |
1646 | ts.cl->length = gfc_int_expr (1); | |
1647 | } | |
1648 | ||
1649 | /* Record the Successful match. */ | |
1650 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
1651 | return MATCH_ERROR; | |
1652 | continue; | |
1653 | } | |
39351103 | 1654 | |
1655 | gfc_current_locus = cur_loc; | |
1656 | } | |
1657 | ||
b70528c7 | 1658 | /* Discard the (incorrectly) matched range. */ |
1659 | gfc_clear_new_implicit (); | |
1660 | ||
1661 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
1662 | if (ts.type == BT_CHARACTER) | |
1663 | m = match_char_spec (&ts); | |
1664 | else | |
39351103 | 1665 | { |
b70528c7 | 1666 | m = gfc_match_kind_spec (&ts); |
39351103 | 1667 | if (m == MATCH_NO) |
b70528c7 | 1668 | { |
1669 | m = gfc_match_old_kind_spec (&ts); | |
1670 | if (m == MATCH_ERROR) | |
1671 | goto error; | |
1672 | if (m == MATCH_NO) | |
1673 | goto syntax; | |
1674 | } | |
39351103 | 1675 | } |
b70528c7 | 1676 | if (m == MATCH_ERROR) |
1677 | goto error; | |
39351103 | 1678 | |
b70528c7 | 1679 | m = match_implicit_range (); |
39351103 | 1680 | if (m == MATCH_ERROR) |
1681 | goto error; | |
1682 | if (m == MATCH_NO) | |
1683 | goto syntax; | |
1684 | ||
1685 | gfc_gobble_whitespace (); | |
1686 | c = gfc_next_char (); | |
1687 | if ((c != '\n') && (c != ',')) | |
1688 | goto syntax; | |
1689 | ||
b70528c7 | 1690 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
1691 | return MATCH_ERROR; | |
39351103 | 1692 | } |
1693 | while (c == ','); | |
1694 | ||
b70528c7 | 1695 | return MATCH_YES; |
39351103 | 1696 | |
1697 | syntax: | |
1698 | gfc_syntax_error (ST_IMPLICIT); | |
1699 | ||
1700 | error: | |
1701 | return MATCH_ERROR; | |
1702 | } | |
1703 | ||
1704 | ||
4ee9c684 | 1705 | /* Matches an attribute specification including array specs. If |
1706 | successful, leaves the variables current_attr and current_as | |
1707 | holding the specification. Also sets the colon_seen variable for | |
1708 | later use by matchers associated with initializations. | |
1709 | ||
1710 | This subroutine is a little tricky in the sense that we don't know | |
1711 | if we really have an attr-spec until we hit the double colon. | |
1712 | Until that time, we can only return MATCH_NO. This forces us to | |
1713 | check for duplicate specification at this level. */ | |
1714 | ||
1715 | static match | |
1716 | match_attr_spec (void) | |
1717 | { | |
1718 | ||
1719 | /* Modifiers that can exist in a type statement. */ | |
1720 | typedef enum | |
1721 | { GFC_DECL_BEGIN = 0, | |
1722 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
1723 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
1724 | DECL_PARAMETER, DECL_POINTER, DECL_PRIVATE, DECL_PUBLIC, DECL_SAVE, | |
1725 | DECL_TARGET, DECL_COLON, DECL_NONE, | |
1726 | GFC_DECL_END /* Sentinel */ | |
1727 | } | |
1728 | decl_types; | |
1729 | ||
1730 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
1731 | #define NUM_DECL GFC_DECL_END | |
1732 | ||
1733 | static mstring decls[] = { | |
1734 | minit (", allocatable", DECL_ALLOCATABLE), | |
1735 | minit (", dimension", DECL_DIMENSION), | |
1736 | minit (", external", DECL_EXTERNAL), | |
1737 | minit (", intent ( in )", DECL_IN), | |
1738 | minit (", intent ( out )", DECL_OUT), | |
1739 | minit (", intent ( in out )", DECL_INOUT), | |
1740 | minit (", intrinsic", DECL_INTRINSIC), | |
1741 | minit (", optional", DECL_OPTIONAL), | |
1742 | minit (", parameter", DECL_PARAMETER), | |
1743 | minit (", pointer", DECL_POINTER), | |
1744 | minit (", private", DECL_PRIVATE), | |
1745 | minit (", public", DECL_PUBLIC), | |
1746 | minit (", save", DECL_SAVE), | |
1747 | minit (", target", DECL_TARGET), | |
1748 | minit ("::", DECL_COLON), | |
1749 | minit (NULL, DECL_NONE) | |
1750 | }; | |
1751 | ||
1752 | locus start, seen_at[NUM_DECL]; | |
1753 | int seen[NUM_DECL]; | |
1754 | decl_types d; | |
1755 | const char *attr; | |
1756 | match m; | |
1757 | try t; | |
1758 | ||
1759 | gfc_clear_attr (¤t_attr); | |
cbb9e6aa | 1760 | start = gfc_current_locus; |
4ee9c684 | 1761 | |
1762 | current_as = NULL; | |
1763 | colon_seen = 0; | |
1764 | ||
1765 | /* See if we get all of the keywords up to the final double colon. */ | |
1766 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
1767 | seen[d] = 0; | |
1768 | ||
1769 | for (;;) | |
1770 | { | |
1771 | d = (decl_types) gfc_match_strings (decls); | |
1772 | if (d == DECL_NONE || d == DECL_COLON) | |
1773 | break; | |
1774 | ||
1775 | seen[d]++; | |
cbb9e6aa | 1776 | seen_at[d] = gfc_current_locus; |
4ee9c684 | 1777 | |
1778 | if (d == DECL_DIMENSION) | |
1779 | { | |
1780 | m = gfc_match_array_spec (¤t_as); | |
1781 | ||
1782 | if (m == MATCH_NO) | |
1783 | { | |
1784 | gfc_error ("Missing dimension specification at %C"); | |
1785 | m = MATCH_ERROR; | |
1786 | } | |
1787 | ||
1788 | if (m == MATCH_ERROR) | |
1789 | goto cleanup; | |
1790 | } | |
1791 | } | |
1792 | ||
1793 | /* No double colon, so assume that we've been looking at something | |
1794 | else the whole time. */ | |
1795 | if (d == DECL_NONE) | |
1796 | { | |
1797 | m = MATCH_NO; | |
1798 | goto cleanup; | |
1799 | } | |
1800 | ||
1801 | /* Since we've seen a double colon, we have to be looking at an | |
1802 | attr-spec. This means that we can now issue errors. */ | |
1803 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
1804 | if (seen[d] > 1) | |
1805 | { | |
1806 | switch (d) | |
1807 | { | |
1808 | case DECL_ALLOCATABLE: | |
1809 | attr = "ALLOCATABLE"; | |
1810 | break; | |
1811 | case DECL_DIMENSION: | |
1812 | attr = "DIMENSION"; | |
1813 | break; | |
1814 | case DECL_EXTERNAL: | |
1815 | attr = "EXTERNAL"; | |
1816 | break; | |
1817 | case DECL_IN: | |
1818 | attr = "INTENT (IN)"; | |
1819 | break; | |
1820 | case DECL_OUT: | |
1821 | attr = "INTENT (OUT)"; | |
1822 | break; | |
1823 | case DECL_INOUT: | |
1824 | attr = "INTENT (IN OUT)"; | |
1825 | break; | |
1826 | case DECL_INTRINSIC: | |
1827 | attr = "INTRINSIC"; | |
1828 | break; | |
1829 | case DECL_OPTIONAL: | |
1830 | attr = "OPTIONAL"; | |
1831 | break; | |
1832 | case DECL_PARAMETER: | |
1833 | attr = "PARAMETER"; | |
1834 | break; | |
1835 | case DECL_POINTER: | |
1836 | attr = "POINTER"; | |
1837 | break; | |
1838 | case DECL_PRIVATE: | |
1839 | attr = "PRIVATE"; | |
1840 | break; | |
1841 | case DECL_PUBLIC: | |
1842 | attr = "PUBLIC"; | |
1843 | break; | |
1844 | case DECL_SAVE: | |
1845 | attr = "SAVE"; | |
1846 | break; | |
1847 | case DECL_TARGET: | |
1848 | attr = "TARGET"; | |
1849 | break; | |
1850 | default: | |
1851 | attr = NULL; /* This shouldn't happen */ | |
1852 | } | |
1853 | ||
1854 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
1855 | m = MATCH_ERROR; | |
1856 | goto cleanup; | |
1857 | } | |
1858 | ||
1859 | /* Now that we've dealt with duplicate attributes, add the attributes | |
1860 | to the current attribute. */ | |
1861 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
1862 | { | |
1863 | if (seen[d] == 0) | |
1864 | continue; | |
1865 | ||
1866 | if (gfc_current_state () == COMP_DERIVED | |
1867 | && d != DECL_DIMENSION && d != DECL_POINTER | |
1868 | && d != DECL_COLON && d != DECL_NONE) | |
1869 | { | |
1870 | ||
1871 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
1872 | &seen_at[d]); | |
1873 | m = MATCH_ERROR; | |
1874 | goto cleanup; | |
1875 | } | |
1876 | ||
ea13b9b7 | 1877 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
1878 | && gfc_current_state () != COMP_MODULE) | |
1879 | { | |
1880 | if (d == DECL_PRIVATE) | |
1881 | attr = "PRIVATE"; | |
1882 | else | |
1883 | attr = "PUBLIC"; | |
1884 | ||
1885 | gfc_error ("%s attribute at %L is not allowed outside of a MODULE", | |
1886 | attr, &seen_at[d]); | |
1887 | m = MATCH_ERROR; | |
1888 | goto cleanup; | |
1889 | } | |
1890 | ||
4ee9c684 | 1891 | switch (d) |
1892 | { | |
1893 | case DECL_ALLOCATABLE: | |
1894 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
1895 | break; | |
1896 | ||
1897 | case DECL_DIMENSION: | |
950683ed | 1898 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 1899 | break; |
1900 | ||
1901 | case DECL_EXTERNAL: | |
1902 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
1903 | break; | |
1904 | ||
1905 | case DECL_IN: | |
1906 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
1907 | break; | |
1908 | ||
1909 | case DECL_OUT: | |
1910 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
1911 | break; | |
1912 | ||
1913 | case DECL_INOUT: | |
1914 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
1915 | break; | |
1916 | ||
1917 | case DECL_INTRINSIC: | |
1918 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
1919 | break; | |
1920 | ||
1921 | case DECL_OPTIONAL: | |
1922 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
1923 | break; | |
1924 | ||
1925 | case DECL_PARAMETER: | |
950683ed | 1926 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
4ee9c684 | 1927 | break; |
1928 | ||
1929 | case DECL_POINTER: | |
1930 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
1931 | break; | |
1932 | ||
1933 | case DECL_PRIVATE: | |
950683ed | 1934 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
1935 | &seen_at[d]); | |
4ee9c684 | 1936 | break; |
1937 | ||
1938 | case DECL_PUBLIC: | |
950683ed | 1939 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
1940 | &seen_at[d]); | |
4ee9c684 | 1941 | break; |
1942 | ||
1943 | case DECL_SAVE: | |
950683ed | 1944 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 1945 | break; |
1946 | ||
1947 | case DECL_TARGET: | |
1948 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
1949 | break; | |
1950 | ||
1951 | default: | |
1952 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
1953 | } | |
1954 | ||
1955 | if (t == FAILURE) | |
1956 | { | |
1957 | m = MATCH_ERROR; | |
1958 | goto cleanup; | |
1959 | } | |
1960 | } | |
1961 | ||
1962 | colon_seen = 1; | |
1963 | return MATCH_YES; | |
1964 | ||
1965 | cleanup: | |
cbb9e6aa | 1966 | gfc_current_locus = start; |
4ee9c684 | 1967 | gfc_free_array_spec (current_as); |
1968 | current_as = NULL; | |
1969 | return m; | |
1970 | } | |
1971 | ||
1972 | ||
1973 | /* Match a data declaration statement. */ | |
1974 | ||
1975 | match | |
1976 | gfc_match_data_decl (void) | |
1977 | { | |
1978 | gfc_symbol *sym; | |
1979 | match m; | |
3923b69f | 1980 | int elem; |
4ee9c684 | 1981 | |
39351103 | 1982 | m = match_type_spec (¤t_ts, 0); |
4ee9c684 | 1983 | if (m != MATCH_YES) |
1984 | return m; | |
1985 | ||
1986 | if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) | |
1987 | { | |
1988 | sym = gfc_use_derived (current_ts.derived); | |
1989 | ||
1990 | if (sym == NULL) | |
1991 | { | |
1992 | m = MATCH_ERROR; | |
1993 | goto cleanup; | |
1994 | } | |
1995 | ||
1996 | current_ts.derived = sym; | |
1997 | } | |
1998 | ||
1999 | m = match_attr_spec (); | |
2000 | if (m == MATCH_ERROR) | |
2001 | { | |
2002 | m = MATCH_NO; | |
2003 | goto cleanup; | |
2004 | } | |
2005 | ||
2006 | if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL) | |
2007 | { | |
2008 | ||
2009 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
2010 | goto ok; | |
2011 | ||
2012 | if (gfc_find_symbol (current_ts.derived->name, | |
2013 | current_ts.derived->ns->parent, 1, &sym) == 0) | |
2014 | goto ok; | |
2015 | ||
2016 | /* Hope that an ambiguous symbol is itself masked by a type definition. */ | |
2017 | if (sym != NULL && sym->attr.flavor == FL_DERIVED) | |
2018 | goto ok; | |
2019 | ||
2020 | gfc_error ("Derived type at %C has not been previously defined"); | |
2021 | m = MATCH_ERROR; | |
2022 | goto cleanup; | |
2023 | } | |
2024 | ||
2025 | ok: | |
2026 | /* If we have an old-style character declaration, and no new-style | |
2027 | attribute specifications, then there a comma is optional between | |
2028 | the type specification and the variable list. */ | |
2029 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
2030 | gfc_match_char (','); | |
2031 | ||
3923b69f | 2032 | /* Give the types/attributes to symbols that follow. Give the element |
2033 | a number so that repeat character length expressions can be copied. */ | |
2034 | elem = 1; | |
4ee9c684 | 2035 | for (;;) |
2036 | { | |
3923b69f | 2037 | m = variable_decl (elem++); |
4ee9c684 | 2038 | if (m == MATCH_ERROR) |
2039 | goto cleanup; | |
2040 | if (m == MATCH_NO) | |
2041 | break; | |
2042 | ||
2043 | if (gfc_match_eos () == MATCH_YES) | |
2044 | goto cleanup; | |
2045 | if (gfc_match_char (',') != MATCH_YES) | |
2046 | break; | |
2047 | } | |
2048 | ||
2049 | gfc_error ("Syntax error in data declaration at %C"); | |
2050 | m = MATCH_ERROR; | |
2051 | ||
2052 | cleanup: | |
2053 | gfc_free_array_spec (current_as); | |
2054 | current_as = NULL; | |
2055 | return m; | |
2056 | } | |
2057 | ||
2058 | ||
2059 | /* Match a prefix associated with a function or subroutine | |
2060 | declaration. If the typespec pointer is nonnull, then a typespec | |
2061 | can be matched. Note that if nothing matches, MATCH_YES is | |
2062 | returned (the null string was matched). */ | |
2063 | ||
2064 | static match | |
2065 | match_prefix (gfc_typespec * ts) | |
2066 | { | |
2067 | int seen_type; | |
2068 | ||
2069 | gfc_clear_attr (¤t_attr); | |
2070 | seen_type = 0; | |
2071 | ||
2072 | loop: | |
2073 | if (!seen_type && ts != NULL | |
39351103 | 2074 | && match_type_spec (ts, 0) == MATCH_YES |
4ee9c684 | 2075 | && gfc_match_space () == MATCH_YES) |
2076 | { | |
2077 | ||
2078 | seen_type = 1; | |
2079 | goto loop; | |
2080 | } | |
2081 | ||
2082 | if (gfc_match ("elemental% ") == MATCH_YES) | |
2083 | { | |
2084 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
2085 | return MATCH_ERROR; | |
2086 | ||
2087 | goto loop; | |
2088 | } | |
2089 | ||
2090 | if (gfc_match ("pure% ") == MATCH_YES) | |
2091 | { | |
2092 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
2093 | return MATCH_ERROR; | |
2094 | ||
2095 | goto loop; | |
2096 | } | |
2097 | ||
2098 | if (gfc_match ("recursive% ") == MATCH_YES) | |
2099 | { | |
2100 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
2101 | return MATCH_ERROR; | |
2102 | ||
2103 | goto loop; | |
2104 | } | |
2105 | ||
2106 | /* At this point, the next item is not a prefix. */ | |
2107 | return MATCH_YES; | |
2108 | } | |
2109 | ||
2110 | ||
2111 | /* Copy attributes matched by match_prefix() to attributes on a symbol. */ | |
2112 | ||
2113 | static try | |
2114 | copy_prefix (symbol_attribute * dest, locus * where) | |
2115 | { | |
2116 | ||
2117 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) | |
2118 | return FAILURE; | |
2119 | ||
2120 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
2121 | return FAILURE; | |
2122 | ||
2123 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
2124 | return FAILURE; | |
2125 | ||
2126 | return SUCCESS; | |
2127 | } | |
2128 | ||
2129 | ||
2130 | /* Match a formal argument list. */ | |
2131 | ||
2132 | match | |
2133 | gfc_match_formal_arglist (gfc_symbol * progname, int st_flag, int null_flag) | |
2134 | { | |
2135 | gfc_formal_arglist *head, *tail, *p, *q; | |
2136 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2137 | gfc_symbol *sym; | |
2138 | match m; | |
2139 | ||
2140 | head = tail = NULL; | |
2141 | ||
2142 | if (gfc_match_char ('(') != MATCH_YES) | |
2143 | { | |
2144 | if (null_flag) | |
2145 | goto ok; | |
2146 | return MATCH_NO; | |
2147 | } | |
2148 | ||
2149 | if (gfc_match_char (')') == MATCH_YES) | |
2150 | goto ok; | |
2151 | ||
2152 | for (;;) | |
2153 | { | |
2154 | if (gfc_match_char ('*') == MATCH_YES) | |
2155 | sym = NULL; | |
2156 | else | |
2157 | { | |
2158 | m = gfc_match_name (name); | |
2159 | if (m != MATCH_YES) | |
2160 | goto cleanup; | |
2161 | ||
2162 | if (gfc_get_symbol (name, NULL, &sym)) | |
2163 | goto cleanup; | |
2164 | } | |
2165 | ||
2166 | p = gfc_get_formal_arglist (); | |
2167 | ||
2168 | if (head == NULL) | |
2169 | head = tail = p; | |
2170 | else | |
2171 | { | |
2172 | tail->next = p; | |
2173 | tail = p; | |
2174 | } | |
2175 | ||
2176 | tail->sym = sym; | |
2177 | ||
2178 | /* We don't add the VARIABLE flavor because the name could be a | |
2179 | dummy procedure. We don't apply these attributes to formal | |
2180 | arguments of statement functions. */ | |
2181 | if (sym != NULL && !st_flag | |
950683ed | 2182 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
4ee9c684 | 2183 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
2184 | { | |
2185 | m = MATCH_ERROR; | |
2186 | goto cleanup; | |
2187 | } | |
2188 | ||
2189 | /* The name of a program unit can be in a different namespace, | |
2190 | so check for it explicitly. After the statement is accepted, | |
2191 | the name is checked for especially in gfc_get_symbol(). */ | |
2192 | if (gfc_new_block != NULL && sym != NULL | |
2193 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
2194 | { | |
2195 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
2196 | sym->name); | |
2197 | m = MATCH_ERROR; | |
2198 | goto cleanup; | |
2199 | } | |
2200 | ||
2201 | if (gfc_match_char (')') == MATCH_YES) | |
2202 | goto ok; | |
2203 | ||
2204 | m = gfc_match_char (','); | |
2205 | if (m != MATCH_YES) | |
2206 | { | |
2207 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
2208 | goto cleanup; | |
2209 | } | |
2210 | } | |
2211 | ||
2212 | ok: | |
2213 | /* Check for duplicate symbols in the formal argument list. */ | |
2214 | if (head != NULL) | |
2215 | { | |
2216 | for (p = head; p->next; p = p->next) | |
2217 | { | |
2218 | if (p->sym == NULL) | |
2219 | continue; | |
2220 | ||
2221 | for (q = p->next; q; q = q->next) | |
2222 | if (p->sym == q->sym) | |
2223 | { | |
2224 | gfc_error | |
2225 | ("Duplicate symbol '%s' in formal argument list at %C", | |
2226 | p->sym->name); | |
2227 | ||
2228 | m = MATCH_ERROR; | |
2229 | goto cleanup; | |
2230 | } | |
2231 | } | |
2232 | } | |
2233 | ||
2234 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) == | |
2235 | FAILURE) | |
2236 | { | |
2237 | m = MATCH_ERROR; | |
2238 | goto cleanup; | |
2239 | } | |
2240 | ||
2241 | return MATCH_YES; | |
2242 | ||
2243 | cleanup: | |
2244 | gfc_free_formal_arglist (head); | |
2245 | return m; | |
2246 | } | |
2247 | ||
2248 | ||
2249 | /* Match a RESULT specification following a function declaration or | |
2250 | ENTRY statement. Also matches the end-of-statement. */ | |
2251 | ||
2252 | static match | |
2253 | match_result (gfc_symbol * function, gfc_symbol ** result) | |
2254 | { | |
2255 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2256 | gfc_symbol *r; | |
2257 | match m; | |
2258 | ||
2259 | if (gfc_match (" result (") != MATCH_YES) | |
2260 | return MATCH_NO; | |
2261 | ||
2262 | m = gfc_match_name (name); | |
2263 | if (m != MATCH_YES) | |
2264 | return m; | |
2265 | ||
2266 | if (gfc_match (" )%t") != MATCH_YES) | |
2267 | { | |
2268 | gfc_error ("Unexpected junk following RESULT variable at %C"); | |
2269 | return MATCH_ERROR; | |
2270 | } | |
2271 | ||
2272 | if (strcmp (function->name, name) == 0) | |
2273 | { | |
2274 | gfc_error | |
2275 | ("RESULT variable at %C must be different than function name"); | |
2276 | return MATCH_ERROR; | |
2277 | } | |
2278 | ||
2279 | if (gfc_get_symbol (name, NULL, &r)) | |
2280 | return MATCH_ERROR; | |
2281 | ||
950683ed | 2282 | if (gfc_add_flavor (&r->attr, FL_VARIABLE, r->name, NULL) == FAILURE |
2283 | || gfc_add_result (&r->attr, r->name, NULL) == FAILURE) | |
4ee9c684 | 2284 | return MATCH_ERROR; |
2285 | ||
2286 | *result = r; | |
2287 | ||
2288 | return MATCH_YES; | |
2289 | } | |
2290 | ||
2291 | ||
2292 | /* Match a function declaration. */ | |
2293 | ||
2294 | match | |
2295 | gfc_match_function_decl (void) | |
2296 | { | |
2297 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2298 | gfc_symbol *sym, *result; | |
2299 | locus old_loc; | |
2300 | match m; | |
2301 | ||
2302 | if (gfc_current_state () != COMP_NONE | |
2303 | && gfc_current_state () != COMP_INTERFACE | |
2304 | && gfc_current_state () != COMP_CONTAINS) | |
2305 | return MATCH_NO; | |
2306 | ||
2307 | gfc_clear_ts (¤t_ts); | |
2308 | ||
cbb9e6aa | 2309 | old_loc = gfc_current_locus; |
4ee9c684 | 2310 | |
2311 | m = match_prefix (¤t_ts); | |
2312 | if (m != MATCH_YES) | |
2313 | { | |
cbb9e6aa | 2314 | gfc_current_locus = old_loc; |
4ee9c684 | 2315 | return m; |
2316 | } | |
2317 | ||
2318 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
2319 | { | |
cbb9e6aa | 2320 | gfc_current_locus = old_loc; |
4ee9c684 | 2321 | return MATCH_NO; |
2322 | } | |
2323 | ||
2324 | if (get_proc_name (name, &sym)) | |
2325 | return MATCH_ERROR; | |
2326 | gfc_new_block = sym; | |
2327 | ||
2328 | m = gfc_match_formal_arglist (sym, 0, 0); | |
2329 | if (m == MATCH_NO) | |
2330 | gfc_error ("Expected formal argument list in function definition at %C"); | |
2331 | else if (m == MATCH_ERROR) | |
2332 | goto cleanup; | |
2333 | ||
2334 | result = NULL; | |
2335 | ||
2336 | if (gfc_match_eos () != MATCH_YES) | |
2337 | { | |
2338 | /* See if a result variable is present. */ | |
2339 | m = match_result (sym, &result); | |
2340 | if (m == MATCH_NO) | |
2341 | gfc_error ("Unexpected junk after function declaration at %C"); | |
2342 | ||
2343 | if (m != MATCH_YES) | |
2344 | { | |
2345 | m = MATCH_ERROR; | |
2346 | goto cleanup; | |
2347 | } | |
2348 | } | |
2349 | ||
2350 | /* Make changes to the symbol. */ | |
2351 | m = MATCH_ERROR; | |
2352 | ||
950683ed | 2353 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) |
4ee9c684 | 2354 | goto cleanup; |
2355 | ||
2356 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
2357 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
2358 | goto cleanup; | |
2359 | ||
2360 | if (current_ts.type != BT_UNKNOWN && sym->ts.type != BT_UNKNOWN) | |
2361 | { | |
2362 | gfc_error ("Function '%s' at %C already has a type of %s", name, | |
2363 | gfc_basic_typename (sym->ts.type)); | |
2364 | goto cleanup; | |
2365 | } | |
2366 | ||
2367 | if (result == NULL) | |
2368 | { | |
2369 | sym->ts = current_ts; | |
2370 | sym->result = sym; | |
2371 | } | |
2372 | else | |
2373 | { | |
2374 | result->ts = current_ts; | |
2375 | sym->result = result; | |
2376 | } | |
2377 | ||
2378 | return MATCH_YES; | |
2379 | ||
2380 | cleanup: | |
cbb9e6aa | 2381 | gfc_current_locus = old_loc; |
4ee9c684 | 2382 | return m; |
2383 | } | |
2384 | ||
2385 | ||
2386 | /* Match an ENTRY statement. */ | |
2387 | ||
2388 | match | |
2389 | gfc_match_entry (void) | |
2390 | { | |
1b716045 | 2391 | gfc_symbol *proc; |
2392 | gfc_symbol *result; | |
2393 | gfc_symbol *entry; | |
4ee9c684 | 2394 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
2395 | gfc_compile_state state; | |
2396 | match m; | |
1b716045 | 2397 | gfc_entry_list *el; |
4ee9c684 | 2398 | |
2399 | m = gfc_match_name (name); | |
2400 | if (m != MATCH_YES) | |
2401 | return m; | |
2402 | ||
1b716045 | 2403 | state = gfc_current_state (); |
2404 | if (state != COMP_SUBROUTINE | |
2405 | && state != COMP_FUNCTION) | |
2406 | { | |
2407 | gfc_error ("ENTRY statement at %C cannot appear within %s", | |
2408 | gfc_state_name (gfc_current_state ())); | |
2409 | return MATCH_ERROR; | |
2410 | } | |
2411 | ||
2412 | if (gfc_current_ns->parent != NULL | |
2413 | && gfc_current_ns->parent->proc_name | |
2414 | && gfc_current_ns->parent->proc_name->attr.flavor != FL_MODULE) | |
2415 | { | |
2416 | gfc_error("ENTRY statement at %C cannot appear in a " | |
2417 | "contained procedure"); | |
2418 | return MATCH_ERROR; | |
2419 | } | |
2420 | ||
4ee9c684 | 2421 | if (get_proc_name (name, &entry)) |
2422 | return MATCH_ERROR; | |
2423 | ||
1b716045 | 2424 | proc = gfc_current_block (); |
2425 | ||
2426 | if (state == COMP_SUBROUTINE) | |
4ee9c684 | 2427 | { |
950683ed | 2428 | /* An entry in a subroutine. */ |
4ee9c684 | 2429 | m = gfc_match_formal_arglist (entry, 0, 1); |
2430 | if (m != MATCH_YES) | |
2431 | return MATCH_ERROR; | |
2432 | ||
950683ed | 2433 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
2434 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 2435 | return MATCH_ERROR; |
1b716045 | 2436 | } |
2437 | else | |
2438 | { | |
2439 | /* An entry in a function. */ | |
69643e1d | 2440 | m = gfc_match_formal_arglist (entry, 0, 1); |
4ee9c684 | 2441 | if (m != MATCH_YES) |
2442 | return MATCH_ERROR; | |
2443 | ||
4ee9c684 | 2444 | result = NULL; |
2445 | ||
2446 | if (gfc_match_eos () == MATCH_YES) | |
2447 | { | |
950683ed | 2448 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
2449 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 2450 | return MATCH_ERROR; |
2451 | ||
c6871095 | 2452 | entry->result = entry; |
4ee9c684 | 2453 | } |
2454 | else | |
2455 | { | |
1b716045 | 2456 | m = match_result (proc, &result); |
4ee9c684 | 2457 | if (m == MATCH_NO) |
2458 | gfc_syntax_error (ST_ENTRY); | |
2459 | if (m != MATCH_YES) | |
2460 | return MATCH_ERROR; | |
2461 | ||
950683ed | 2462 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE |
2463 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
2464 | || gfc_add_function (&entry->attr, result->name, | |
2465 | NULL) == FAILURE) | |
4ee9c684 | 2466 | return MATCH_ERROR; |
c6871095 | 2467 | |
2468 | entry->result = result; | |
4ee9c684 | 2469 | } |
2470 | ||
1b716045 | 2471 | if (proc->attr.recursive && result == NULL) |
4ee9c684 | 2472 | { |
2473 | gfc_error ("RESULT attribute required in ENTRY statement at %C"); | |
2474 | return MATCH_ERROR; | |
2475 | } | |
4ee9c684 | 2476 | } |
2477 | ||
2478 | if (gfc_match_eos () != MATCH_YES) | |
2479 | { | |
2480 | gfc_syntax_error (ST_ENTRY); | |
2481 | return MATCH_ERROR; | |
2482 | } | |
2483 | ||
1b716045 | 2484 | entry->attr.recursive = proc->attr.recursive; |
2485 | entry->attr.elemental = proc->attr.elemental; | |
2486 | entry->attr.pure = proc->attr.pure; | |
4ee9c684 | 2487 | |
1b716045 | 2488 | el = gfc_get_entry_list (); |
2489 | el->sym = entry; | |
2490 | el->next = gfc_current_ns->entries; | |
2491 | gfc_current_ns->entries = el; | |
2492 | if (el->next) | |
2493 | el->id = el->next->id + 1; | |
2494 | else | |
2495 | el->id = 1; | |
4ee9c684 | 2496 | |
1b716045 | 2497 | new_st.op = EXEC_ENTRY; |
2498 | new_st.ext.entry = el; | |
2499 | ||
2500 | return MATCH_YES; | |
4ee9c684 | 2501 | } |
2502 | ||
2503 | ||
2504 | /* Match a subroutine statement, including optional prefixes. */ | |
2505 | ||
2506 | match | |
2507 | gfc_match_subroutine (void) | |
2508 | { | |
2509 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2510 | gfc_symbol *sym; | |
2511 | match m; | |
2512 | ||
2513 | if (gfc_current_state () != COMP_NONE | |
2514 | && gfc_current_state () != COMP_INTERFACE | |
2515 | && gfc_current_state () != COMP_CONTAINS) | |
2516 | return MATCH_NO; | |
2517 | ||
2518 | m = match_prefix (NULL); | |
2519 | if (m != MATCH_YES) | |
2520 | return m; | |
2521 | ||
2522 | m = gfc_match ("subroutine% %n", name); | |
2523 | if (m != MATCH_YES) | |
2524 | return m; | |
2525 | ||
2526 | if (get_proc_name (name, &sym)) | |
2527 | return MATCH_ERROR; | |
2528 | gfc_new_block = sym; | |
2529 | ||
950683ed | 2530 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
4ee9c684 | 2531 | return MATCH_ERROR; |
2532 | ||
2533 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
2534 | return MATCH_ERROR; | |
2535 | ||
2536 | if (gfc_match_eos () != MATCH_YES) | |
2537 | { | |
2538 | gfc_syntax_error (ST_SUBROUTINE); | |
2539 | return MATCH_ERROR; | |
2540 | } | |
2541 | ||
2542 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
2543 | return MATCH_ERROR; | |
2544 | ||
2545 | return MATCH_YES; | |
2546 | } | |
2547 | ||
2548 | ||
231e961a | 2549 | /* Return nonzero if we're currently compiling a contained procedure. */ |
c0985832 | 2550 | |
2551 | static int | |
2552 | contained_procedure (void) | |
2553 | { | |
2554 | gfc_state_data *s; | |
2555 | ||
2556 | for (s=gfc_state_stack; s; s=s->previous) | |
2557 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) | |
2558 | && s->previous != NULL | |
2559 | && s->previous->state == COMP_CONTAINS) | |
2560 | return 1; | |
2561 | ||
2562 | return 0; | |
2563 | } | |
2564 | ||
4ee9c684 | 2565 | /* Match any of the various end-block statements. Returns the type of |
2566 | END to the caller. The END INTERFACE, END IF, END DO and END | |
2567 | SELECT statements cannot be replaced by a single END statement. */ | |
2568 | ||
2569 | match | |
2570 | gfc_match_end (gfc_statement * st) | |
2571 | { | |
2572 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2573 | gfc_compile_state state; | |
2574 | locus old_loc; | |
2575 | const char *block_name; | |
2576 | const char *target; | |
c0985832 | 2577 | int eos_ok; |
4ee9c684 | 2578 | match m; |
2579 | ||
cbb9e6aa | 2580 | old_loc = gfc_current_locus; |
4ee9c684 | 2581 | if (gfc_match ("end") != MATCH_YES) |
2582 | return MATCH_NO; | |
2583 | ||
2584 | state = gfc_current_state (); | |
2585 | block_name = | |
2586 | gfc_current_block () == NULL ? NULL : gfc_current_block ()->name; | |
2587 | ||
2588 | if (state == COMP_CONTAINS) | |
2589 | { | |
2590 | state = gfc_state_stack->previous->state; | |
2591 | block_name = gfc_state_stack->previous->sym == NULL ? NULL | |
2592 | : gfc_state_stack->previous->sym->name; | |
2593 | } | |
2594 | ||
2595 | switch (state) | |
2596 | { | |
2597 | case COMP_NONE: | |
2598 | case COMP_PROGRAM: | |
2599 | *st = ST_END_PROGRAM; | |
2600 | target = " program"; | |
c0985832 | 2601 | eos_ok = 1; |
4ee9c684 | 2602 | break; |
2603 | ||
2604 | case COMP_SUBROUTINE: | |
2605 | *st = ST_END_SUBROUTINE; | |
2606 | target = " subroutine"; | |
c0985832 | 2607 | eos_ok = !contained_procedure (); |
4ee9c684 | 2608 | break; |
2609 | ||
2610 | case COMP_FUNCTION: | |
2611 | *st = ST_END_FUNCTION; | |
2612 | target = " function"; | |
c0985832 | 2613 | eos_ok = !contained_procedure (); |
4ee9c684 | 2614 | break; |
2615 | ||
2616 | case COMP_BLOCK_DATA: | |
2617 | *st = ST_END_BLOCK_DATA; | |
2618 | target = " block data"; | |
c0985832 | 2619 | eos_ok = 1; |
4ee9c684 | 2620 | break; |
2621 | ||
2622 | case COMP_MODULE: | |
2623 | *st = ST_END_MODULE; | |
2624 | target = " module"; | |
c0985832 | 2625 | eos_ok = 1; |
4ee9c684 | 2626 | break; |
2627 | ||
2628 | case COMP_INTERFACE: | |
2629 | *st = ST_END_INTERFACE; | |
2630 | target = " interface"; | |
c0985832 | 2631 | eos_ok = 0; |
4ee9c684 | 2632 | break; |
2633 | ||
2634 | case COMP_DERIVED: | |
2635 | *st = ST_END_TYPE; | |
2636 | target = " type"; | |
c0985832 | 2637 | eos_ok = 0; |
4ee9c684 | 2638 | break; |
2639 | ||
2640 | case COMP_IF: | |
2641 | *st = ST_ENDIF; | |
2642 | target = " if"; | |
c0985832 | 2643 | eos_ok = 0; |
4ee9c684 | 2644 | break; |
2645 | ||
2646 | case COMP_DO: | |
2647 | *st = ST_ENDDO; | |
2648 | target = " do"; | |
c0985832 | 2649 | eos_ok = 0; |
4ee9c684 | 2650 | break; |
2651 | ||
2652 | case COMP_SELECT: | |
2653 | *st = ST_END_SELECT; | |
2654 | target = " select"; | |
c0985832 | 2655 | eos_ok = 0; |
4ee9c684 | 2656 | break; |
2657 | ||
2658 | case COMP_FORALL: | |
2659 | *st = ST_END_FORALL; | |
2660 | target = " forall"; | |
c0985832 | 2661 | eos_ok = 0; |
4ee9c684 | 2662 | break; |
2663 | ||
2664 | case COMP_WHERE: | |
2665 | *st = ST_END_WHERE; | |
2666 | target = " where"; | |
c0985832 | 2667 | eos_ok = 0; |
4ee9c684 | 2668 | break; |
2669 | ||
2670 | default: | |
2671 | gfc_error ("Unexpected END statement at %C"); | |
2672 | goto cleanup; | |
2673 | } | |
2674 | ||
2675 | if (gfc_match_eos () == MATCH_YES) | |
2676 | { | |
c0985832 | 2677 | if (!eos_ok) |
4ee9c684 | 2678 | { |
c0985832 | 2679 | /* We would have required END [something] */ |
d197c9ee | 2680 | gfc_error ("%s statement expected at %L", |
2681 | gfc_ascii_statement (*st), &old_loc); | |
4ee9c684 | 2682 | goto cleanup; |
2683 | } | |
2684 | ||
2685 | return MATCH_YES; | |
2686 | } | |
2687 | ||
2688 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
2689 | if (gfc_match (target) != MATCH_YES) | |
2690 | { | |
2691 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
2692 | goto cleanup; | |
2693 | } | |
2694 | ||
2695 | /* If we're at the end, make sure a block name wasn't required. */ | |
2696 | if (gfc_match_eos () == MATCH_YES) | |
2697 | { | |
2698 | ||
2699 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT) | |
2700 | return MATCH_YES; | |
2701 | ||
2702 | if (gfc_current_block () == NULL) | |
2703 | return MATCH_YES; | |
2704 | ||
2705 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
2706 | block_name, gfc_ascii_statement (*st)); | |
2707 | ||
2708 | return MATCH_ERROR; | |
2709 | } | |
2710 | ||
2711 | /* END INTERFACE has a special handler for its several possible endings. */ | |
2712 | if (*st == ST_END_INTERFACE) | |
2713 | return gfc_match_end_interface (); | |
2714 | ||
2715 | /* We haven't hit the end of statement, so what is left must be an end-name. */ | |
2716 | m = gfc_match_space (); | |
2717 | if (m == MATCH_YES) | |
2718 | m = gfc_match_name (name); | |
2719 | ||
2720 | if (m == MATCH_NO) | |
2721 | gfc_error ("Expected terminating name at %C"); | |
2722 | if (m != MATCH_YES) | |
2723 | goto cleanup; | |
2724 | ||
2725 | if (block_name == NULL) | |
2726 | goto syntax; | |
2727 | ||
2728 | if (strcmp (name, block_name) != 0) | |
2729 | { | |
2730 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
2731 | gfc_ascii_statement (*st)); | |
2732 | goto cleanup; | |
2733 | } | |
2734 | ||
2735 | if (gfc_match_eos () == MATCH_YES) | |
2736 | return MATCH_YES; | |
2737 | ||
2738 | syntax: | |
2739 | gfc_syntax_error (*st); | |
2740 | ||
2741 | cleanup: | |
cbb9e6aa | 2742 | gfc_current_locus = old_loc; |
4ee9c684 | 2743 | return MATCH_ERROR; |
2744 | } | |
2745 | ||
2746 | ||
2747 | ||
2748 | /***************** Attribute declaration statements ****************/ | |
2749 | ||
2750 | /* Set the attribute of a single variable. */ | |
2751 | ||
2752 | static match | |
2753 | attr_decl1 (void) | |
2754 | { | |
2755 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2756 | gfc_array_spec *as; | |
2757 | gfc_symbol *sym; | |
2758 | locus var_locus; | |
2759 | match m; | |
2760 | ||
2761 | as = NULL; | |
2762 | ||
2763 | m = gfc_match_name (name); | |
2764 | if (m != MATCH_YES) | |
2765 | goto cleanup; | |
2766 | ||
2767 | if (find_special (name, &sym)) | |
2768 | return MATCH_ERROR; | |
2769 | ||
cbb9e6aa | 2770 | var_locus = gfc_current_locus; |
4ee9c684 | 2771 | |
2772 | /* Deal with possible array specification for certain attributes. */ | |
2773 | if (current_attr.dimension | |
2774 | || current_attr.allocatable | |
2775 | || current_attr.pointer | |
2776 | || current_attr.target) | |
2777 | { | |
2778 | m = gfc_match_array_spec (&as); | |
2779 | if (m == MATCH_ERROR) | |
2780 | goto cleanup; | |
2781 | ||
2782 | if (current_attr.dimension && m == MATCH_NO) | |
2783 | { | |
2784 | gfc_error | |
2785 | ("Missing array specification at %L in DIMENSION statement", | |
2786 | &var_locus); | |
2787 | m = MATCH_ERROR; | |
2788 | goto cleanup; | |
2789 | } | |
2790 | ||
2791 | if ((current_attr.allocatable || current_attr.pointer) | |
2792 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
2793 | { | |
2794 | gfc_error ("Array specification must be deferred at %L", | |
2795 | &var_locus); | |
2796 | m = MATCH_ERROR; | |
2797 | goto cleanup; | |
2798 | } | |
2799 | } | |
2800 | ||
2801 | /* Update symbol table. DIMENSION attribute is set in gfc_set_array_spec(). */ | |
2802 | if (current_attr.dimension == 0 | |
2803 | && gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
2804 | { | |
2805 | m = MATCH_ERROR; | |
2806 | goto cleanup; | |
2807 | } | |
2808 | ||
2809 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
2810 | { | |
2811 | m = MATCH_ERROR; | |
2812 | goto cleanup; | |
2813 | } | |
2814 | ||
2815 | if ((current_attr.external || current_attr.intrinsic) | |
2816 | && sym->attr.flavor != FL_PROCEDURE | |
950683ed | 2817 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
4ee9c684 | 2818 | { |
2819 | m = MATCH_ERROR; | |
2820 | goto cleanup; | |
2821 | } | |
2822 | ||
2823 | return MATCH_YES; | |
2824 | ||
2825 | cleanup: | |
2826 | gfc_free_array_spec (as); | |
2827 | return m; | |
2828 | } | |
2829 | ||
2830 | ||
2831 | /* Generic attribute declaration subroutine. Used for attributes that | |
2832 | just have a list of names. */ | |
2833 | ||
2834 | static match | |
2835 | attr_decl (void) | |
2836 | { | |
2837 | match m; | |
2838 | ||
2839 | /* Gobble the optional double colon, by simply ignoring the result | |
2840 | of gfc_match(). */ | |
2841 | gfc_match (" ::"); | |
2842 | ||
2843 | for (;;) | |
2844 | { | |
2845 | m = attr_decl1 (); | |
2846 | if (m != MATCH_YES) | |
2847 | break; | |
2848 | ||
2849 | if (gfc_match_eos () == MATCH_YES) | |
2850 | { | |
2851 | m = MATCH_YES; | |
2852 | break; | |
2853 | } | |
2854 | ||
2855 | if (gfc_match_char (',') != MATCH_YES) | |
2856 | { | |
2857 | gfc_error ("Unexpected character in variable list at %C"); | |
2858 | m = MATCH_ERROR; | |
2859 | break; | |
2860 | } | |
2861 | } | |
2862 | ||
2863 | return m; | |
2864 | } | |
2865 | ||
2866 | ||
2867 | match | |
2868 | gfc_match_external (void) | |
2869 | { | |
2870 | ||
2871 | gfc_clear_attr (¤t_attr); | |
2872 | gfc_add_external (¤t_attr, NULL); | |
2873 | ||
2874 | return attr_decl (); | |
2875 | } | |
2876 | ||
2877 | ||
2878 | ||
2879 | match | |
2880 | gfc_match_intent (void) | |
2881 | { | |
2882 | sym_intent intent; | |
2883 | ||
2884 | intent = match_intent_spec (); | |
2885 | if (intent == INTENT_UNKNOWN) | |
2886 | return MATCH_ERROR; | |
2887 | ||
2888 | gfc_clear_attr (¤t_attr); | |
2889 | gfc_add_intent (¤t_attr, intent, NULL); /* Can't fail */ | |
2890 | ||
2891 | return attr_decl (); | |
2892 | } | |
2893 | ||
2894 | ||
2895 | match | |
2896 | gfc_match_intrinsic (void) | |
2897 | { | |
2898 | ||
2899 | gfc_clear_attr (¤t_attr); | |
2900 | gfc_add_intrinsic (¤t_attr, NULL); | |
2901 | ||
2902 | return attr_decl (); | |
2903 | } | |
2904 | ||
2905 | ||
2906 | match | |
2907 | gfc_match_optional (void) | |
2908 | { | |
2909 | ||
2910 | gfc_clear_attr (¤t_attr); | |
2911 | gfc_add_optional (¤t_attr, NULL); | |
2912 | ||
2913 | return attr_decl (); | |
2914 | } | |
2915 | ||
2916 | ||
2917 | match | |
2918 | gfc_match_pointer (void) | |
2919 | { | |
2920 | ||
2921 | gfc_clear_attr (¤t_attr); | |
2922 | gfc_add_pointer (¤t_attr, NULL); | |
2923 | ||
2924 | return attr_decl (); | |
2925 | } | |
2926 | ||
2927 | ||
2928 | match | |
2929 | gfc_match_allocatable (void) | |
2930 | { | |
2931 | ||
2932 | gfc_clear_attr (¤t_attr); | |
2933 | gfc_add_allocatable (¤t_attr, NULL); | |
2934 | ||
2935 | return attr_decl (); | |
2936 | } | |
2937 | ||
2938 | ||
2939 | match | |
2940 | gfc_match_dimension (void) | |
2941 | { | |
2942 | ||
2943 | gfc_clear_attr (¤t_attr); | |
950683ed | 2944 | gfc_add_dimension (¤t_attr, NULL, NULL); |
4ee9c684 | 2945 | |
2946 | return attr_decl (); | |
2947 | } | |
2948 | ||
2949 | ||
2950 | match | |
2951 | gfc_match_target (void) | |
2952 | { | |
2953 | ||
2954 | gfc_clear_attr (¤t_attr); | |
2955 | gfc_add_target (¤t_attr, NULL); | |
2956 | ||
2957 | return attr_decl (); | |
2958 | } | |
2959 | ||
2960 | ||
2961 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
2962 | statement. */ | |
2963 | ||
2964 | static match | |
2965 | access_attr_decl (gfc_statement st) | |
2966 | { | |
2967 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2968 | interface_type type; | |
2969 | gfc_user_op *uop; | |
2970 | gfc_symbol *sym; | |
2971 | gfc_intrinsic_op operator; | |
2972 | match m; | |
2973 | ||
2974 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
2975 | goto done; | |
2976 | ||
2977 | for (;;) | |
2978 | { | |
2979 | m = gfc_match_generic_spec (&type, name, &operator); | |
2980 | if (m == MATCH_NO) | |
2981 | goto syntax; | |
2982 | if (m == MATCH_ERROR) | |
2983 | return MATCH_ERROR; | |
2984 | ||
2985 | switch (type) | |
2986 | { | |
2987 | case INTERFACE_NAMELESS: | |
2988 | goto syntax; | |
2989 | ||
2990 | case INTERFACE_GENERIC: | |
2991 | if (gfc_get_symbol (name, NULL, &sym)) | |
2992 | goto done; | |
2993 | ||
2994 | if (gfc_add_access (&sym->attr, | |
2995 | (st == | |
2996 | ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
950683ed | 2997 | sym->name, NULL) == FAILURE) |
4ee9c684 | 2998 | return MATCH_ERROR; |
2999 | ||
3000 | break; | |
3001 | ||
3002 | case INTERFACE_INTRINSIC_OP: | |
3003 | if (gfc_current_ns->operator_access[operator] == ACCESS_UNKNOWN) | |
3004 | { | |
3005 | gfc_current_ns->operator_access[operator] = | |
3006 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
3007 | } | |
3008 | else | |
3009 | { | |
3010 | gfc_error ("Access specification of the %s operator at %C has " | |
3011 | "already been specified", gfc_op2string (operator)); | |
3012 | goto done; | |
3013 | } | |
3014 | ||
3015 | break; | |
3016 | ||
3017 | case INTERFACE_USER_OP: | |
3018 | uop = gfc_get_uop (name); | |
3019 | ||
3020 | if (uop->access == ACCESS_UNKNOWN) | |
3021 | { | |
3022 | uop->access = | |
3023 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
3024 | } | |
3025 | else | |
3026 | { | |
3027 | gfc_error | |
3028 | ("Access specification of the .%s. operator at %C has " | |
3029 | "already been specified", sym->name); | |
3030 | goto done; | |
3031 | } | |
3032 | ||
3033 | break; | |
3034 | } | |
3035 | ||
3036 | if (gfc_match_char (',') == MATCH_NO) | |
3037 | break; | |
3038 | } | |
3039 | ||
3040 | if (gfc_match_eos () != MATCH_YES) | |
3041 | goto syntax; | |
3042 | return MATCH_YES; | |
3043 | ||
3044 | syntax: | |
3045 | gfc_syntax_error (st); | |
3046 | ||
3047 | done: | |
3048 | return MATCH_ERROR; | |
3049 | } | |
3050 | ||
3051 | ||
3052 | /* The PRIVATE statement is a bit weird in that it can be a attribute | |
3053 | declaration, but also works as a standlone statement inside of a | |
3054 | type declaration or a module. */ | |
3055 | ||
3056 | match | |
3057 | gfc_match_private (gfc_statement * st) | |
3058 | { | |
3059 | ||
3060 | if (gfc_match ("private") != MATCH_YES) | |
3061 | return MATCH_NO; | |
3062 | ||
3063 | if (gfc_current_state () == COMP_DERIVED) | |
3064 | { | |
3065 | if (gfc_match_eos () == MATCH_YES) | |
3066 | { | |
3067 | *st = ST_PRIVATE; | |
3068 | return MATCH_YES; | |
3069 | } | |
3070 | ||
3071 | gfc_syntax_error (ST_PRIVATE); | |
3072 | return MATCH_ERROR; | |
3073 | } | |
3074 | ||
3075 | if (gfc_match_eos () == MATCH_YES) | |
3076 | { | |
3077 | *st = ST_PRIVATE; | |
3078 | return MATCH_YES; | |
3079 | } | |
3080 | ||
3081 | *st = ST_ATTR_DECL; | |
3082 | return access_attr_decl (ST_PRIVATE); | |
3083 | } | |
3084 | ||
3085 | ||
3086 | match | |
3087 | gfc_match_public (gfc_statement * st) | |
3088 | { | |
3089 | ||
3090 | if (gfc_match ("public") != MATCH_YES) | |
3091 | return MATCH_NO; | |
3092 | ||
3093 | if (gfc_match_eos () == MATCH_YES) | |
3094 | { | |
3095 | *st = ST_PUBLIC; | |
3096 | return MATCH_YES; | |
3097 | } | |
3098 | ||
3099 | *st = ST_ATTR_DECL; | |
3100 | return access_attr_decl (ST_PUBLIC); | |
3101 | } | |
3102 | ||
3103 | ||
3104 | /* Workhorse for gfc_match_parameter. */ | |
3105 | ||
3106 | static match | |
3107 | do_parm (void) | |
3108 | { | |
3109 | gfc_symbol *sym; | |
3110 | gfc_expr *init; | |
3111 | match m; | |
3112 | ||
3113 | m = gfc_match_symbol (&sym, 0); | |
3114 | if (m == MATCH_NO) | |
3115 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
3116 | ||
3117 | if (m != MATCH_YES) | |
3118 | return m; | |
3119 | ||
3120 | if (gfc_match_char ('=') == MATCH_NO) | |
3121 | { | |
3122 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
3123 | return MATCH_ERROR; | |
3124 | } | |
3125 | ||
3126 | m = gfc_match_init_expr (&init); | |
3127 | if (m == MATCH_NO) | |
3128 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
3129 | if (m != MATCH_YES) | |
3130 | return m; | |
3131 | ||
3132 | if (sym->ts.type == BT_UNKNOWN | |
3133 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
3134 | { | |
3135 | m = MATCH_ERROR; | |
3136 | goto cleanup; | |
3137 | } | |
3138 | ||
3139 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
950683ed | 3140 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
4ee9c684 | 3141 | { |
3142 | m = MATCH_ERROR; | |
3143 | goto cleanup; | |
3144 | } | |
3145 | ||
c1b6da4a | 3146 | if (sym->ts.type == BT_CHARACTER |
3147 | && sym->ts.cl != NULL | |
3148 | && sym->ts.cl->length != NULL | |
3149 | && sym->ts.cl->length->expr_type == EXPR_CONSTANT | |
3150 | && init->expr_type == EXPR_CONSTANT | |
3151 | && init->ts.type == BT_CHARACTER | |
3152 | && init->ts.kind == 1) | |
3153 | gfc_set_constant_character_len ( | |
3154 | mpz_get_si (sym->ts.cl->length->value.integer), init); | |
3155 | ||
4ee9c684 | 3156 | sym->value = init; |
3157 | return MATCH_YES; | |
3158 | ||
3159 | cleanup: | |
3160 | gfc_free_expr (init); | |
3161 | return m; | |
3162 | } | |
3163 | ||
3164 | ||
3165 | /* Match a parameter statement, with the weird syntax that these have. */ | |
3166 | ||
3167 | match | |
3168 | gfc_match_parameter (void) | |
3169 | { | |
3170 | match m; | |
3171 | ||
3172 | if (gfc_match_char ('(') == MATCH_NO) | |
3173 | return MATCH_NO; | |
3174 | ||
3175 | for (;;) | |
3176 | { | |
3177 | m = do_parm (); | |
3178 | if (m != MATCH_YES) | |
3179 | break; | |
3180 | ||
3181 | if (gfc_match (" )%t") == MATCH_YES) | |
3182 | break; | |
3183 | ||
3184 | if (gfc_match_char (',') != MATCH_YES) | |
3185 | { | |
3186 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
3187 | m = MATCH_ERROR; | |
3188 | break; | |
3189 | } | |
3190 | } | |
3191 | ||
3192 | return m; | |
3193 | } | |
3194 | ||
3195 | ||
3196 | /* Save statements have a special syntax. */ | |
3197 | ||
3198 | match | |
3199 | gfc_match_save (void) | |
3200 | { | |
82f5ee13 | 3201 | char n[GFC_MAX_SYMBOL_LEN+1]; |
3202 | gfc_common_head *c; | |
4ee9c684 | 3203 | gfc_symbol *sym; |
3204 | match m; | |
3205 | ||
3206 | if (gfc_match_eos () == MATCH_YES) | |
3207 | { | |
3208 | if (gfc_current_ns->seen_save) | |
3209 | { | |
3210 | gfc_error ("Blanket SAVE statement at %C follows previous " | |
3211 | "SAVE statement"); | |
3212 | ||
3213 | return MATCH_ERROR; | |
3214 | } | |
3215 | ||
3216 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
3217 | return MATCH_YES; | |
3218 | } | |
3219 | ||
3220 | if (gfc_current_ns->save_all) | |
3221 | { | |
3222 | gfc_error ("SAVE statement at %C follows blanket SAVE statement"); | |
3223 | return MATCH_ERROR; | |
3224 | } | |
3225 | ||
3226 | gfc_match (" ::"); | |
3227 | ||
3228 | for (;;) | |
3229 | { | |
3230 | m = gfc_match_symbol (&sym, 0); | |
3231 | switch (m) | |
3232 | { | |
3233 | case MATCH_YES: | |
950683ed | 3234 | if (gfc_add_save (&sym->attr, sym->name, |
3235 | &gfc_current_locus) == FAILURE) | |
4ee9c684 | 3236 | return MATCH_ERROR; |
3237 | goto next_item; | |
3238 | ||
3239 | case MATCH_NO: | |
3240 | break; | |
3241 | ||
3242 | case MATCH_ERROR: | |
3243 | return MATCH_ERROR; | |
3244 | } | |
3245 | ||
82f5ee13 | 3246 | m = gfc_match (" / %n /", &n); |
4ee9c684 | 3247 | if (m == MATCH_ERROR) |
3248 | return MATCH_ERROR; | |
3249 | if (m == MATCH_NO) | |
3250 | goto syntax; | |
3251 | ||
403ddc45 | 3252 | c = gfc_get_common (n, 0); |
82f5ee13 | 3253 | c->saved = 1; |
3254 | ||
4ee9c684 | 3255 | gfc_current_ns->seen_save = 1; |
3256 | ||
3257 | next_item: | |
3258 | if (gfc_match_eos () == MATCH_YES) | |
3259 | break; | |
3260 | if (gfc_match_char (',') != MATCH_YES) | |
3261 | goto syntax; | |
3262 | } | |
3263 | ||
3264 | return MATCH_YES; | |
3265 | ||
3266 | syntax: | |
3267 | gfc_error ("Syntax error in SAVE statement at %C"); | |
3268 | return MATCH_ERROR; | |
3269 | } | |
3270 | ||
3271 | ||
3272 | /* Match a module procedure statement. Note that we have to modify | |
3273 | symbols in the parent's namespace because the current one was there | |
89d91d02 | 3274 | to receive symbols that are in an interface's formal argument list. */ |
4ee9c684 | 3275 | |
3276 | match | |
3277 | gfc_match_modproc (void) | |
3278 | { | |
3279 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3280 | gfc_symbol *sym; | |
3281 | match m; | |
3282 | ||
3283 | if (gfc_state_stack->state != COMP_INTERFACE | |
3284 | || gfc_state_stack->previous == NULL | |
3285 | || current_interface.type == INTERFACE_NAMELESS) | |
3286 | { | |
3287 | gfc_error | |
3288 | ("MODULE PROCEDURE at %C must be in a generic module interface"); | |
3289 | return MATCH_ERROR; | |
3290 | } | |
3291 | ||
3292 | for (;;) | |
3293 | { | |
3294 | m = gfc_match_name (name); | |
3295 | if (m == MATCH_NO) | |
3296 | goto syntax; | |
3297 | if (m != MATCH_YES) | |
3298 | return MATCH_ERROR; | |
3299 | ||
3300 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
3301 | return MATCH_ERROR; | |
3302 | ||
3303 | if (sym->attr.proc != PROC_MODULE | |
950683ed | 3304 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
3305 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 3306 | return MATCH_ERROR; |
3307 | ||
3308 | if (gfc_add_interface (sym) == FAILURE) | |
3309 | return MATCH_ERROR; | |
3310 | ||
3311 | if (gfc_match_eos () == MATCH_YES) | |
3312 | break; | |
3313 | if (gfc_match_char (',') != MATCH_YES) | |
3314 | goto syntax; | |
3315 | } | |
3316 | ||
3317 | return MATCH_YES; | |
3318 | ||
3319 | syntax: | |
3320 | gfc_syntax_error (ST_MODULE_PROC); | |
3321 | return MATCH_ERROR; | |
3322 | } | |
3323 | ||
3324 | ||
3325 | /* Match the beginning of a derived type declaration. If a type name | |
3326 | was the result of a function, then it is possible to have a symbol | |
3327 | already to be known as a derived type yet have no components. */ | |
3328 | ||
3329 | match | |
3330 | gfc_match_derived_decl (void) | |
3331 | { | |
3332 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3333 | symbol_attribute attr; | |
3334 | gfc_symbol *sym; | |
3335 | match m; | |
3336 | ||
3337 | if (gfc_current_state () == COMP_DERIVED) | |
3338 | return MATCH_NO; | |
3339 | ||
3340 | gfc_clear_attr (&attr); | |
3341 | ||
3342 | loop: | |
3343 | if (gfc_match (" , private") == MATCH_YES) | |
3344 | { | |
3345 | if (gfc_find_state (COMP_MODULE) == FAILURE) | |
3346 | { | |
3347 | gfc_error | |
3348 | ("Derived type at %C can only be PRIVATE within a MODULE"); | |
3349 | return MATCH_ERROR; | |
3350 | } | |
3351 | ||
950683ed | 3352 | if (gfc_add_access (&attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
4ee9c684 | 3353 | return MATCH_ERROR; |
3354 | goto loop; | |
3355 | } | |
3356 | ||
3357 | if (gfc_match (" , public") == MATCH_YES) | |
3358 | { | |
3359 | if (gfc_find_state (COMP_MODULE) == FAILURE) | |
3360 | { | |
3361 | gfc_error ("Derived type at %C can only be PUBLIC within a MODULE"); | |
3362 | return MATCH_ERROR; | |
3363 | } | |
3364 | ||
950683ed | 3365 | if (gfc_add_access (&attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
4ee9c684 | 3366 | return MATCH_ERROR; |
3367 | goto loop; | |
3368 | } | |
3369 | ||
3370 | if (gfc_match (" ::") != MATCH_YES && attr.access != ACCESS_UNKNOWN) | |
3371 | { | |
3372 | gfc_error ("Expected :: in TYPE definition at %C"); | |
3373 | return MATCH_ERROR; | |
3374 | } | |
3375 | ||
3376 | m = gfc_match (" %n%t", name); | |
3377 | if (m != MATCH_YES) | |
3378 | return m; | |
3379 | ||
3380 | /* Make sure the name isn't the name of an intrinsic type. The | |
3381 | 'double precision' type doesn't get past the name matcher. */ | |
3382 | if (strcmp (name, "integer") == 0 | |
3383 | || strcmp (name, "real") == 0 | |
3384 | || strcmp (name, "character") == 0 | |
3385 | || strcmp (name, "logical") == 0 | |
3386 | || strcmp (name, "complex") == 0) | |
3387 | { | |
3388 | gfc_error | |
3389 | ("Type name '%s' at %C cannot be the same as an intrinsic type", | |
3390 | name); | |
3391 | return MATCH_ERROR; | |
3392 | } | |
3393 | ||
3394 | if (gfc_get_symbol (name, NULL, &sym)) | |
3395 | return MATCH_ERROR; | |
3396 | ||
3397 | if (sym->ts.type != BT_UNKNOWN) | |
3398 | { | |
3399 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
3400 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
3401 | return MATCH_ERROR; | |
3402 | } | |
3403 | ||
3404 | /* The symbol may already have the derived attribute without the | |
3405 | components. The ways this can happen is via a function | |
3406 | definition, an INTRINSIC statement or a subtype in another | |
3407 | derived type that is a pointer. The first part of the AND clause | |
b14e2757 | 3408 | is true if a the symbol is not the return value of a function. */ |
4ee9c684 | 3409 | if (sym->attr.flavor != FL_DERIVED |
950683ed | 3410 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 3411 | return MATCH_ERROR; |
3412 | ||
3413 | if (sym->components != NULL) | |
3414 | { | |
3415 | gfc_error | |
3416 | ("Derived type definition of '%s' at %C has already been defined", | |
3417 | sym->name); | |
3418 | return MATCH_ERROR; | |
3419 | } | |
3420 | ||
3421 | if (attr.access != ACCESS_UNKNOWN | |
950683ed | 3422 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
4ee9c684 | 3423 | return MATCH_ERROR; |
3424 | ||
3425 | gfc_new_block = sym; | |
3426 | ||
3427 | return MATCH_YES; | |
3428 | } |