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6de9cd9a | 1 | /* Declaration statement matcher |
ec378180 | 2 | Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc. |
6de9cd9a DN |
3 | Contributed by Andy Vaught |
4 | ||
9fc4d79b | 5 | This file is part of GCC. |
6de9cd9a | 6 | |
9fc4d79b TS |
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. | |
6de9cd9a | 11 | |
9fc4d79b TS |
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. | |
6de9cd9a DN |
16 | |
17 | You should have received a copy of the GNU General Public License | |
9fc4d79b | 18 | along with GCC; see the file COPYING. If not, write to the Free |
ab57747b KC |
19 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
20 | 02110-1301, USA. */ | |
6de9cd9a DN |
21 | |
22 | ||
23 | #include "config.h" | |
d22e4895 | 24 | #include "system.h" |
6de9cd9a DN |
25 | #include "gfortran.h" |
26 | #include "match.h" | |
27 | #include "parse.h" | |
6de9cd9a DN |
28 | |
29 | ||
2054fc29 | 30 | /* This flag is set if an old-style length selector is matched |
6de9cd9a DN |
31 | during a type-declaration statement. */ |
32 | ||
33 | static int old_char_selector; | |
34 | ||
46fa431d | 35 | /* When variables acquire types and attributes from a declaration |
6de9cd9a DN |
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 | ||
294fbfc8 TS |
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 | ||
5f42ddb0 | 189 | #if 0 /* TODO: Find out where to move this message */ |
294fbfc8 TS |
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 | ||
231b2fcc | 201 | if (gfc_add_data (&sym->attr, sym->name, &new->expr->where) == FAILURE) |
294fbfc8 TS |
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, | |
13795658 | 402 | we are matching a DATA statement and are therefore issuing an error |
294fbfc8 | 403 | if we encounter something unexpected, if not, we're trying to match |
69de3b83 | 404 | an old-style initialization expression of the form INTEGER I /2/. */ |
294fbfc8 TS |
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 | ||
6de9cd9a DN |
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 | ||
9e35b386 EE |
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). */ | |
6de9cd9a DN |
538 | |
539 | static int | |
540 | find_special (const char *name, gfc_symbol ** result) | |
541 | { | |
542 | gfc_state_data *s; | |
9e35b386 | 543 | int i; |
6de9cd9a | 544 | |
9e35b386 EE |
545 | i = gfc_get_symbol (name, NULL, result); |
546 | if (i==0) | |
547 | goto end; | |
548 | ||
6de9cd9a DN |
549 | if (gfc_current_state () != COMP_SUBROUTINE |
550 | && gfc_current_state () != COMP_FUNCTION) | |
9e35b386 | 551 | goto end; |
6de9cd9a DN |
552 | |
553 | s = gfc_state_stack->previous; | |
554 | if (s == NULL) | |
9e35b386 | 555 | goto end; |
6de9cd9a DN |
556 | |
557 | if (s->state != COMP_INTERFACE) | |
9e35b386 | 558 | goto end; |
6de9cd9a | 559 | if (s->sym == NULL) |
9e35b386 | 560 | goto end; /* Nameless interface */ |
6de9cd9a DN |
561 | |
562 | if (strcmp (name, s->sym->name) == 0) | |
563 | { | |
564 | *result = s->sym; | |
565 | return 0; | |
566 | } | |
567 | ||
9e35b386 EE |
568 | end: |
569 | return i; | |
6de9cd9a DN |
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 | ||
3d79abbd | 593 | /* ??? Deal with ENTRY problem */ |
6de9cd9a DN |
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 | |
231b2fcc TS |
606 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
607 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
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 | ||
9e35b386 EE |
624 | /* if (find_special (name, &sym)) */ |
625 | if (gfc_get_symbol (name, NULL, &sym)) | |
6de9cd9a DN |
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 | ||
df7cc9b5 FW |
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 | } | |
6de9cd9a DN |
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 | ||
c8e20bd0 TS |
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 | ||
6de9cd9a DN |
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 | |
1de8a836 | 729 | initializer. */ |
6de9cd9a DN |
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 | ||
75d17889 TS |
738 | /* Check if the assignment can happen. This has to be put off |
739 | until later for a derived type variable. */ | |
6de9cd9a DN |
740 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
741 | && gfc_check_assign_symbol (sym, init) == FAILURE) | |
742 | return FAILURE; | |
743 | ||
df7cc9b5 FW |
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 | { | |
4213f93b PT |
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 | ||
df7cc9b5 FW |
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 | ||
6de9cd9a DN |
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 | |
231b2fcc TS |
888 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
889 | sym->name, NULL) == FAILURE | |
890 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
6de9cd9a DN |
891 | return MATCH_ERROR; |
892 | ||
893 | e = gfc_get_expr (); | |
63645982 | 894 | e->where = gfc_current_locus; |
6de9cd9a DN |
895 | e->expr_type = EXPR_NULL; |
896 | e->ts.type = BT_UNKNOWN; | |
897 | ||
898 | *result = e; | |
899 | ||
900 | return MATCH_YES; | |
901 | } | |
902 | ||
903 | ||
6de9cd9a DN |
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 | |
949d5b72 | 910 | variable_decl (int elem) |
6de9cd9a DN |
911 | { |
912 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
913 | gfc_expr *initializer, *char_len; | |
914 | gfc_array_spec *as; | |
83d890b9 | 915 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
6de9cd9a DN |
916 | gfc_charlen *cl; |
917 | locus var_locus; | |
918 | match m; | |
919 | try t; | |
83d890b9 | 920 | gfc_symbol *sym; |
6de9cd9a DN |
921 | |
922 | initializer = NULL; | |
923 | as = NULL; | |
83d890b9 | 924 | cp_as = NULL; |
6de9cd9a DN |
925 | |
926 | /* When we get here, we've just matched a list of attributes and | |
927 | maybe a type and a double colon. The next thing we expect to see | |
928 | is the name of the symbol. */ | |
929 | m = gfc_match_name (name); | |
930 | if (m != MATCH_YES) | |
931 | goto cleanup; | |
932 | ||
63645982 | 933 | var_locus = gfc_current_locus; |
6de9cd9a DN |
934 | |
935 | /* Now we could see the optional array spec. or character length. */ | |
936 | m = gfc_match_array_spec (&as); | |
83d890b9 AL |
937 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
938 | cp_as = gfc_copy_array_spec (as); | |
939 | else if (m == MATCH_ERROR) | |
6de9cd9a DN |
940 | goto cleanup; |
941 | if (m == MATCH_NO) | |
942 | as = gfc_copy_array_spec (current_as); | |
943 | ||
944 | char_len = NULL; | |
945 | cl = NULL; | |
946 | ||
947 | if (current_ts.type == BT_CHARACTER) | |
948 | { | |
949 | switch (match_char_length (&char_len)) | |
950 | { | |
951 | case MATCH_YES: | |
952 | cl = gfc_get_charlen (); | |
953 | cl->next = gfc_current_ns->cl_list; | |
954 | gfc_current_ns->cl_list = cl; | |
955 | ||
956 | cl->length = char_len; | |
957 | break; | |
958 | ||
949d5b72 PT |
959 | /* Non-constant lengths need to be copied after the first |
960 | element. */ | |
6de9cd9a | 961 | case MATCH_NO: |
949d5b72 PT |
962 | if (elem > 1 && current_ts.cl->length |
963 | && current_ts.cl->length->expr_type != EXPR_CONSTANT) | |
964 | { | |
965 | cl = gfc_get_charlen (); | |
966 | cl->next = gfc_current_ns->cl_list; | |
967 | gfc_current_ns->cl_list = cl; | |
968 | cl->length = gfc_copy_expr (current_ts.cl->length); | |
969 | } | |
970 | else | |
971 | cl = current_ts.cl; | |
972 | ||
6de9cd9a DN |
973 | break; |
974 | ||
975 | case MATCH_ERROR: | |
976 | goto cleanup; | |
977 | } | |
978 | } | |
979 | ||
83d890b9 AL |
980 | /* If this symbol has already shown up in a Cray Pointer declaration, |
981 | then we want to set the type & bail out. */ | |
982 | if (gfc_option.flag_cray_pointer) | |
983 | { | |
984 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
985 | if (sym != NULL && sym->attr.cray_pointee) | |
986 | { | |
987 | sym->ts.type = current_ts.type; | |
988 | sym->ts.kind = current_ts.kind; | |
989 | sym->ts.cl = cl; | |
990 | sym->ts.derived = current_ts.derived; | |
991 | m = MATCH_YES; | |
992 | ||
993 | /* Check to see if we have an array specification. */ | |
994 | if (cp_as != NULL) | |
995 | { | |
996 | if (sym->as != NULL) | |
997 | { | |
998 | gfc_error ("Duplicate array spec for Cray pointee at %C."); | |
999 | gfc_free_array_spec (cp_as); | |
1000 | m = MATCH_ERROR; | |
1001 | goto cleanup; | |
1002 | } | |
1003 | else | |
1004 | { | |
1005 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1006 | gfc_internal_error ("Couldn't set pointee array spec."); | |
1007 | ||
1008 | /* Fix the array spec. */ | |
1009 | m = gfc_mod_pointee_as (sym->as); | |
1010 | if (m == MATCH_ERROR) | |
1011 | goto cleanup; | |
1012 | } | |
1013 | } | |
1014 | goto cleanup; | |
1015 | } | |
1016 | else | |
1017 | { | |
1018 | gfc_free_array_spec (cp_as); | |
1019 | } | |
1020 | } | |
1021 | ||
1022 | ||
6de9cd9a DN |
1023 | /* OK, we've successfully matched the declaration. Now put the |
1024 | symbol in the current namespace, because it might be used in the | |
69de3b83 | 1025 | optional initialization expression for this symbol, e.g. this is |
6de9cd9a DN |
1026 | perfectly legal: |
1027 | ||
1028 | integer, parameter :: i = huge(i) | |
1029 | ||
1030 | This is only true for parameters or variables of a basic type. | |
1031 | For components of derived types, it is not true, so we don't | |
1032 | create a symbol for those yet. If we fail to create the symbol, | |
1033 | bail out. */ | |
1034 | if (gfc_current_state () != COMP_DERIVED | |
1035 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1036 | { | |
1037 | m = MATCH_ERROR; | |
1038 | goto cleanup; | |
1039 | } | |
1040 | ||
1041 | /* In functions that have a RESULT variable defined, the function | |
1042 | name always refers to function calls. Therefore, the name is | |
1043 | not allowed to appear in specification statements. */ | |
1044 | if (gfc_current_state () == COMP_FUNCTION | |
1045 | && gfc_current_block () != NULL | |
1046 | && gfc_current_block ()->result != NULL | |
1047 | && gfc_current_block ()->result != gfc_current_block () | |
1048 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1049 | { | |
1050 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1051 | m = MATCH_ERROR; | |
1052 | goto cleanup; | |
1053 | } | |
1054 | ||
294fbfc8 TS |
1055 | /* We allow old-style initializations of the form |
1056 | integer i /2/, j(4) /3*3, 1/ | |
1057 | (if no colon has been seen). These are different from data | |
1058 | statements in that initializers are only allowed to apply to the | |
1059 | variable immediately preceding, i.e. | |
1060 | integer i, j /1, 2/ | |
1061 | is not allowed. Therefore we have to do some work manually, that | |
75d17889 | 1062 | could otherwise be left to the matchers for DATA statements. */ |
294fbfc8 TS |
1063 | |
1064 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1065 | { | |
1066 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1067 | "initialization at %C") == FAILURE) | |
1068 | return MATCH_ERROR; | |
1069 | ||
1070 | return match_old_style_init (name); | |
1071 | } | |
1072 | ||
6de9cd9a DN |
1073 | /* The double colon must be present in order to have initializers. |
1074 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1075 | if (colon_seen) | |
1076 | { | |
1077 | if (gfc_match (" =>") == MATCH_YES) | |
1078 | { | |
1079 | ||
1080 | if (!current_attr.pointer) | |
1081 | { | |
1082 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1083 | m = MATCH_ERROR; | |
1084 | goto cleanup; | |
1085 | } | |
1086 | ||
1087 | m = gfc_match_null (&initializer); | |
1088 | if (m == MATCH_NO) | |
1089 | { | |
1090 | gfc_error ("Pointer initialization requires a NULL at %C"); | |
1091 | m = MATCH_ERROR; | |
1092 | } | |
1093 | ||
1094 | if (gfc_pure (NULL)) | |
1095 | { | |
1096 | gfc_error | |
1097 | ("Initialization of pointer at %C is not allowed in a " | |
1098 | "PURE procedure"); | |
1099 | m = MATCH_ERROR; | |
1100 | } | |
1101 | ||
1102 | if (m != MATCH_YES) | |
1103 | goto cleanup; | |
1104 | ||
1105 | initializer->ts = current_ts; | |
1106 | ||
1107 | } | |
1108 | else if (gfc_match_char ('=') == MATCH_YES) | |
1109 | { | |
1110 | if (current_attr.pointer) | |
1111 | { | |
1112 | gfc_error | |
1113 | ("Pointer initialization at %C requires '=>', not '='"); | |
1114 | m = MATCH_ERROR; | |
1115 | goto cleanup; | |
1116 | } | |
1117 | ||
1118 | m = gfc_match_init_expr (&initializer); | |
1119 | if (m == MATCH_NO) | |
1120 | { | |
1121 | gfc_error ("Expected an initialization expression at %C"); | |
1122 | m = MATCH_ERROR; | |
1123 | } | |
1124 | ||
1125 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1126 | { | |
1127 | gfc_error | |
1128 | ("Initialization of variable at %C is not allowed in a " | |
1129 | "PURE procedure"); | |
1130 | m = MATCH_ERROR; | |
1131 | } | |
1132 | ||
1133 | if (m != MATCH_YES) | |
1134 | goto cleanup; | |
1135 | } | |
cb44ab82 VL |
1136 | } |
1137 | ||
54b4ba60 | 1138 | /* Add the initializer. Note that it is fine if initializer is |
6de9cd9a DN |
1139 | NULL here, because we sometimes also need to check if a |
1140 | declaration *must* have an initialization expression. */ | |
1141 | if (gfc_current_state () != COMP_DERIVED) | |
1142 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1143 | else | |
54b4ba60 | 1144 | { |
6019a1a4 | 1145 | if (current_ts.type == BT_DERIVED && !current_attr.pointer && !initializer) |
54b4ba60 PB |
1146 | initializer = gfc_default_initializer (¤t_ts); |
1147 | t = build_struct (name, cl, &initializer, &as); | |
1148 | } | |
6de9cd9a DN |
1149 | |
1150 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1151 | ||
1152 | cleanup: | |
1153 | /* Free stuff up and return. */ | |
1154 | gfc_free_expr (initializer); | |
1155 | gfc_free_array_spec (as); | |
1156 | ||
1157 | return m; | |
1158 | } | |
1159 | ||
1160 | ||
1161 | /* Match an extended-f77 kind specification. */ | |
1162 | ||
1163 | match | |
1164 | gfc_match_old_kind_spec (gfc_typespec * ts) | |
1165 | { | |
1166 | match m; | |
1167 | ||
1168 | if (gfc_match_char ('*') != MATCH_YES) | |
1169 | return MATCH_NO; | |
1170 | ||
1171 | m = gfc_match_small_literal_int (&ts->kind); | |
1172 | if (m != MATCH_YES) | |
1173 | return MATCH_ERROR; | |
1174 | ||
1175 | /* Massage the kind numbers for complex types. */ | |
1176 | if (ts->type == BT_COMPLEX && ts->kind == 8) | |
1177 | ts->kind = 4; | |
1178 | if (ts->type == BT_COMPLEX && ts->kind == 16) | |
1179 | ts->kind = 8; | |
1180 | ||
e7a2d5fb | 1181 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a DN |
1182 | { |
1183 | gfc_error ("Old-style kind %d not supported for type %s at %C", | |
1184 | ts->kind, gfc_basic_typename (ts->type)); | |
1185 | ||
1186 | return MATCH_ERROR; | |
1187 | } | |
1188 | ||
1189 | return MATCH_YES; | |
1190 | } | |
1191 | ||
1192 | ||
1193 | /* Match a kind specification. Since kinds are generally optional, we | |
1194 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1195 | string is found, then we know we have an error. */ | |
1196 | ||
1197 | match | |
1198 | gfc_match_kind_spec (gfc_typespec * ts) | |
1199 | { | |
1200 | locus where; | |
1201 | gfc_expr *e; | |
1202 | match m, n; | |
1203 | const char *msg; | |
1204 | ||
1205 | m = MATCH_NO; | |
1206 | e = NULL; | |
1207 | ||
63645982 | 1208 | where = gfc_current_locus; |
6de9cd9a DN |
1209 | |
1210 | if (gfc_match_char ('(') == MATCH_NO) | |
1211 | return MATCH_NO; | |
1212 | ||
1213 | /* Also gobbles optional text. */ | |
1214 | if (gfc_match (" kind = ") == MATCH_YES) | |
1215 | m = MATCH_ERROR; | |
1216 | ||
1217 | n = gfc_match_init_expr (&e); | |
1218 | if (n == MATCH_NO) | |
1219 | gfc_error ("Expected initialization expression at %C"); | |
1220 | if (n != MATCH_YES) | |
1221 | return MATCH_ERROR; | |
1222 | ||
1223 | if (e->rank != 0) | |
1224 | { | |
1225 | gfc_error ("Expected scalar initialization expression at %C"); | |
1226 | m = MATCH_ERROR; | |
1227 | goto no_match; | |
1228 | } | |
1229 | ||
1230 | msg = gfc_extract_int (e, &ts->kind); | |
1231 | if (msg != NULL) | |
1232 | { | |
1233 | gfc_error (msg); | |
1234 | m = MATCH_ERROR; | |
1235 | goto no_match; | |
1236 | } | |
1237 | ||
1238 | gfc_free_expr (e); | |
1239 | e = NULL; | |
1240 | ||
e7a2d5fb | 1241 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a DN |
1242 | { |
1243 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
1244 | gfc_basic_typename (ts->type)); | |
1245 | ||
1246 | m = MATCH_ERROR; | |
1247 | goto no_match; | |
1248 | } | |
1249 | ||
1250 | if (gfc_match_char (')') != MATCH_YES) | |
1251 | { | |
1252 | gfc_error ("Missing right paren at %C"); | |
1253 | goto no_match; | |
1254 | } | |
1255 | ||
1256 | return MATCH_YES; | |
1257 | ||
1258 | no_match: | |
1259 | gfc_free_expr (e); | |
63645982 | 1260 | gfc_current_locus = where; |
6de9cd9a DN |
1261 | return m; |
1262 | } | |
1263 | ||
1264 | ||
1265 | /* Match the various kind/length specifications in a CHARACTER | |
1266 | declaration. We don't return MATCH_NO. */ | |
1267 | ||
1268 | static match | |
1269 | match_char_spec (gfc_typespec * ts) | |
1270 | { | |
1271 | int i, kind, seen_length; | |
1272 | gfc_charlen *cl; | |
1273 | gfc_expr *len; | |
1274 | match m; | |
1275 | ||
9d64df18 | 1276 | kind = gfc_default_character_kind; |
6de9cd9a DN |
1277 | len = NULL; |
1278 | seen_length = 0; | |
1279 | ||
1280 | /* Try the old-style specification first. */ | |
1281 | old_char_selector = 0; | |
1282 | ||
1283 | m = match_char_length (&len); | |
1284 | if (m != MATCH_NO) | |
1285 | { | |
1286 | if (m == MATCH_YES) | |
1287 | old_char_selector = 1; | |
1288 | seen_length = 1; | |
1289 | goto done; | |
1290 | } | |
1291 | ||
1292 | m = gfc_match_char ('('); | |
1293 | if (m != MATCH_YES) | |
1294 | { | |
1295 | m = MATCH_YES; /* character without length is a single char */ | |
1296 | goto done; | |
1297 | } | |
1298 | ||
1299 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ) */ | |
1300 | if (gfc_match (" kind =") == MATCH_YES) | |
1301 | { | |
1302 | m = gfc_match_small_int (&kind); | |
1303 | if (m == MATCH_ERROR) | |
1304 | goto done; | |
1305 | if (m == MATCH_NO) | |
1306 | goto syntax; | |
1307 | ||
1308 | if (gfc_match (" , len =") == MATCH_NO) | |
1309 | goto rparen; | |
1310 | ||
1311 | m = char_len_param_value (&len); | |
1312 | if (m == MATCH_NO) | |
1313 | goto syntax; | |
1314 | if (m == MATCH_ERROR) | |
1315 | goto done; | |
1316 | seen_length = 1; | |
1317 | ||
1318 | goto rparen; | |
1319 | } | |
1320 | ||
1321 | /* Try to match ( LEN = <len-param> ) or ( LEN = <len-param>, KIND = <int> ) */ | |
1322 | if (gfc_match (" len =") == MATCH_YES) | |
1323 | { | |
1324 | m = char_len_param_value (&len); | |
1325 | if (m == MATCH_NO) | |
1326 | goto syntax; | |
1327 | if (m == MATCH_ERROR) | |
1328 | goto done; | |
1329 | seen_length = 1; | |
1330 | ||
1331 | if (gfc_match_char (')') == MATCH_YES) | |
1332 | goto done; | |
1333 | ||
1334 | if (gfc_match (" , kind =") != MATCH_YES) | |
1335 | goto syntax; | |
1336 | ||
1337 | gfc_match_small_int (&kind); | |
1338 | ||
e7a2d5fb | 1339 | if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
6de9cd9a DN |
1340 | { |
1341 | gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); | |
1342 | return MATCH_YES; | |
1343 | } | |
1344 | ||
1345 | goto rparen; | |
1346 | } | |
1347 | ||
1348 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ) */ | |
1349 | m = char_len_param_value (&len); | |
1350 | if (m == MATCH_NO) | |
1351 | goto syntax; | |
1352 | if (m == MATCH_ERROR) | |
1353 | goto done; | |
1354 | seen_length = 1; | |
1355 | ||
1356 | m = gfc_match_char (')'); | |
1357 | if (m == MATCH_YES) | |
1358 | goto done; | |
1359 | ||
1360 | if (gfc_match_char (',') != MATCH_YES) | |
1361 | goto syntax; | |
1362 | ||
1363 | gfc_match (" kind ="); /* Gobble optional text */ | |
1364 | ||
1365 | m = gfc_match_small_int (&kind); | |
1366 | if (m == MATCH_ERROR) | |
1367 | goto done; | |
1368 | if (m == MATCH_NO) | |
1369 | goto syntax; | |
1370 | ||
1371 | rparen: | |
1372 | /* Require a right-paren at this point. */ | |
1373 | m = gfc_match_char (')'); | |
1374 | if (m == MATCH_YES) | |
1375 | goto done; | |
1376 | ||
1377 | syntax: | |
1378 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
1379 | m = MATCH_ERROR; | |
1380 | ||
1381 | done: | |
e7a2d5fb | 1382 | if (m == MATCH_YES && gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
6de9cd9a DN |
1383 | { |
1384 | gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); | |
1385 | m = MATCH_ERROR; | |
1386 | } | |
1387 | ||
1388 | if (m != MATCH_YES) | |
1389 | { | |
1390 | gfc_free_expr (len); | |
1391 | return m; | |
1392 | } | |
1393 | ||
1394 | /* Do some final massaging of the length values. */ | |
1395 | cl = gfc_get_charlen (); | |
1396 | cl->next = gfc_current_ns->cl_list; | |
1397 | gfc_current_ns->cl_list = cl; | |
1398 | ||
1399 | if (seen_length == 0) | |
1400 | cl->length = gfc_int_expr (1); | |
1401 | else | |
1402 | { | |
1403 | if (len == NULL || gfc_extract_int (len, &i) != NULL || i >= 0) | |
1404 | cl->length = len; | |
1405 | else | |
1406 | { | |
1407 | gfc_free_expr (len); | |
1408 | cl->length = gfc_int_expr (0); | |
1409 | } | |
1410 | } | |
1411 | ||
1412 | ts->cl = cl; | |
1413 | ts->kind = kind; | |
1414 | ||
1415 | return MATCH_YES; | |
1416 | } | |
1417 | ||
1418 | ||
1419 | /* Matches a type specification. If successful, sets the ts structure | |
1420 | to the matched specification. This is necessary for FUNCTION and | |
1421 | IMPLICIT statements. | |
1422 | ||
e5ddaa24 TS |
1423 | If implicit_flag is nonzero, then we don't check for the optional |
1424 | kind specification. Not doing so is needed for matching an IMPLICIT | |
6de9cd9a DN |
1425 | statement correctly. */ |
1426 | ||
e5ddaa24 TS |
1427 | static match |
1428 | match_type_spec (gfc_typespec * ts, int implicit_flag) | |
6de9cd9a DN |
1429 | { |
1430 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1431 | gfc_symbol *sym; | |
1432 | match m; | |
0ff0dfbf | 1433 | int c; |
6de9cd9a DN |
1434 | |
1435 | gfc_clear_ts (ts); | |
1436 | ||
5f700e6d AL |
1437 | if (gfc_match (" byte") == MATCH_YES) |
1438 | { | |
1439 | if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C") | |
1440 | == FAILURE) | |
1441 | return MATCH_ERROR; | |
1442 | ||
1443 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
1444 | { | |
1445 | gfc_error ("BYTE type used at %C " | |
1446 | "is not available on the target machine"); | |
1447 | return MATCH_ERROR; | |
1448 | } | |
1449 | ||
1450 | ts->type = BT_INTEGER; | |
1451 | ts->kind = 1; | |
1452 | return MATCH_YES; | |
1453 | } | |
1454 | ||
6de9cd9a DN |
1455 | if (gfc_match (" integer") == MATCH_YES) |
1456 | { | |
1457 | ts->type = BT_INTEGER; | |
9d64df18 | 1458 | ts->kind = gfc_default_integer_kind; |
6de9cd9a DN |
1459 | goto get_kind; |
1460 | } | |
1461 | ||
1462 | if (gfc_match (" character") == MATCH_YES) | |
1463 | { | |
1464 | ts->type = BT_CHARACTER; | |
e5ddaa24 TS |
1465 | if (implicit_flag == 0) |
1466 | return match_char_spec (ts); | |
1467 | else | |
1468 | return MATCH_YES; | |
6de9cd9a DN |
1469 | } |
1470 | ||
1471 | if (gfc_match (" real") == MATCH_YES) | |
1472 | { | |
1473 | ts->type = BT_REAL; | |
9d64df18 | 1474 | ts->kind = gfc_default_real_kind; |
6de9cd9a DN |
1475 | goto get_kind; |
1476 | } | |
1477 | ||
1478 | if (gfc_match (" double precision") == MATCH_YES) | |
1479 | { | |
1480 | ts->type = BT_REAL; | |
9d64df18 | 1481 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
1482 | return MATCH_YES; |
1483 | } | |
1484 | ||
1485 | if (gfc_match (" complex") == MATCH_YES) | |
1486 | { | |
1487 | ts->type = BT_COMPLEX; | |
9d64df18 | 1488 | ts->kind = gfc_default_complex_kind; |
6de9cd9a DN |
1489 | goto get_kind; |
1490 | } | |
1491 | ||
1492 | if (gfc_match (" double complex") == MATCH_YES) | |
1493 | { | |
1494 | ts->type = BT_COMPLEX; | |
9d64df18 | 1495 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
1496 | return MATCH_YES; |
1497 | } | |
1498 | ||
1499 | if (gfc_match (" logical") == MATCH_YES) | |
1500 | { | |
1501 | ts->type = BT_LOGICAL; | |
9d64df18 | 1502 | ts->kind = gfc_default_logical_kind; |
6de9cd9a DN |
1503 | goto get_kind; |
1504 | } | |
1505 | ||
1506 | m = gfc_match (" type ( %n )", name); | |
1507 | if (m != MATCH_YES) | |
1508 | return m; | |
1509 | ||
1510 | /* Search for the name but allow the components to be defined later. */ | |
1511 | if (gfc_get_ha_symbol (name, &sym)) | |
1512 | { | |
1513 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
1514 | return MATCH_ERROR; | |
1515 | } | |
1516 | ||
1517 | if (sym->attr.flavor != FL_DERIVED | |
231b2fcc | 1518 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
1519 | return MATCH_ERROR; |
1520 | ||
1521 | ts->type = BT_DERIVED; | |
1522 | ts->kind = 0; | |
1523 | ts->derived = sym; | |
1524 | ||
1525 | return MATCH_YES; | |
1526 | ||
1527 | get_kind: | |
1528 | /* For all types except double, derived and character, look for an | |
1529 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
e5ddaa24 | 1530 | if (implicit_flag == 1) |
6de9cd9a DN |
1531 | return MATCH_YES; |
1532 | ||
0ff0dfbf TS |
1533 | if (gfc_current_form == FORM_FREE) |
1534 | { | |
1535 | c = gfc_peek_char(); | |
1536 | if (!gfc_is_whitespace(c) && c != '*' && c != '(' | |
1537 | && c != ':' && c != ',') | |
1538 | return MATCH_NO; | |
1539 | } | |
1540 | ||
6de9cd9a DN |
1541 | m = gfc_match_kind_spec (ts); |
1542 | if (m == MATCH_NO && ts->type != BT_CHARACTER) | |
1543 | m = gfc_match_old_kind_spec (ts); | |
1544 | ||
1545 | if (m == MATCH_NO) | |
1546 | m = MATCH_YES; /* No kind specifier found. */ | |
1547 | ||
1548 | return m; | |
1549 | } | |
1550 | ||
1551 | ||
e5ddaa24 TS |
1552 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
1553 | already matched in parse.c, or we would not end up here in the | |
1554 | first place. So the only thing we need to check, is if there is | |
1555 | trailing garbage. If not, the match is successful. */ | |
1556 | ||
1557 | match | |
1558 | gfc_match_implicit_none (void) | |
1559 | { | |
1560 | ||
1561 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; | |
1562 | } | |
1563 | ||
1564 | ||
1565 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
1566 | ||
1567 | static match | |
1107b970 | 1568 | match_implicit_range (void) |
e5ddaa24 TS |
1569 | { |
1570 | int c, c1, c2, inner; | |
1571 | locus cur_loc; | |
1572 | ||
1573 | cur_loc = gfc_current_locus; | |
1574 | ||
1575 | gfc_gobble_whitespace (); | |
1576 | c = gfc_next_char (); | |
1577 | if (c != '(') | |
1578 | { | |
1579 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
1580 | goto bad; | |
1581 | } | |
1582 | ||
1583 | inner = 1; | |
1584 | while (inner) | |
1585 | { | |
1586 | gfc_gobble_whitespace (); | |
1587 | c1 = gfc_next_char (); | |
1588 | if (!ISALPHA (c1)) | |
1589 | goto bad; | |
1590 | ||
1591 | gfc_gobble_whitespace (); | |
1592 | c = gfc_next_char (); | |
1593 | ||
1594 | switch (c) | |
1595 | { | |
1596 | case ')': | |
1597 | inner = 0; /* Fall through */ | |
1598 | ||
1599 | case ',': | |
1600 | c2 = c1; | |
1601 | break; | |
1602 | ||
1603 | case '-': | |
1604 | gfc_gobble_whitespace (); | |
1605 | c2 = gfc_next_char (); | |
1606 | if (!ISALPHA (c2)) | |
1607 | goto bad; | |
1608 | ||
1609 | gfc_gobble_whitespace (); | |
1610 | c = gfc_next_char (); | |
1611 | ||
1612 | if ((c != ',') && (c != ')')) | |
1613 | goto bad; | |
1614 | if (c == ')') | |
1615 | inner = 0; | |
1616 | ||
1617 | break; | |
1618 | ||
1619 | default: | |
1620 | goto bad; | |
1621 | } | |
1622 | ||
1623 | if (c1 > c2) | |
1624 | { | |
1625 | gfc_error ("Letters must be in alphabetic order in " | |
1626 | "IMPLICIT statement at %C"); | |
1627 | goto bad; | |
1628 | } | |
1629 | ||
1630 | /* See if we can add the newly matched range to the pending | |
1631 | implicits from this IMPLICIT statement. We do not check for | |
1632 | conflicts with whatever earlier IMPLICIT statements may have | |
1633 | set. This is done when we've successfully finished matching | |
1634 | the current one. */ | |
1107b970 | 1635 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
e5ddaa24 TS |
1636 | goto bad; |
1637 | } | |
1638 | ||
1639 | return MATCH_YES; | |
1640 | ||
1641 | bad: | |
1642 | gfc_syntax_error (ST_IMPLICIT); | |
1643 | ||
1644 | gfc_current_locus = cur_loc; | |
1645 | return MATCH_ERROR; | |
1646 | } | |
1647 | ||
1648 | ||
1649 | /* Match an IMPLICIT statement, storing the types for | |
1650 | gfc_set_implicit() if the statement is accepted by the parser. | |
1651 | There is a strange looking, but legal syntactic construction | |
1652 | possible. It looks like: | |
1653 | ||
1654 | IMPLICIT INTEGER (a-b) (c-d) | |
1655 | ||
1656 | This is legal if "a-b" is a constant expression that happens to | |
1657 | equal one of the legal kinds for integers. The real problem | |
1658 | happens with an implicit specification that looks like: | |
1659 | ||
1660 | IMPLICIT INTEGER (a-b) | |
1661 | ||
1662 | In this case, a typespec matcher that is "greedy" (as most of the | |
1663 | matchers are) gobbles the character range as a kindspec, leaving | |
1664 | nothing left. We therefore have to go a bit more slowly in the | |
1665 | matching process by inhibiting the kindspec checking during | |
1666 | typespec matching and checking for a kind later. */ | |
1667 | ||
1668 | match | |
1669 | gfc_match_implicit (void) | |
1670 | { | |
1671 | gfc_typespec ts; | |
1672 | locus cur_loc; | |
1673 | int c; | |
1674 | match m; | |
1675 | ||
1676 | /* We don't allow empty implicit statements. */ | |
1677 | if (gfc_match_eos () == MATCH_YES) | |
1678 | { | |
1679 | gfc_error ("Empty IMPLICIT statement at %C"); | |
1680 | return MATCH_ERROR; | |
1681 | } | |
1682 | ||
e5ddaa24 TS |
1683 | do |
1684 | { | |
1107b970 PB |
1685 | /* First cleanup. */ |
1686 | gfc_clear_new_implicit (); | |
1687 | ||
e5ddaa24 TS |
1688 | /* A basic type is mandatory here. */ |
1689 | m = match_type_spec (&ts, 1); | |
1690 | if (m == MATCH_ERROR) | |
1691 | goto error; | |
1692 | if (m == MATCH_NO) | |
1693 | goto syntax; | |
1694 | ||
1695 | cur_loc = gfc_current_locus; | |
1107b970 | 1696 | m = match_implicit_range (); |
e5ddaa24 TS |
1697 | |
1698 | if (m == MATCH_YES) | |
1699 | { | |
1107b970 | 1700 | /* We may have <TYPE> (<RANGE>). */ |
e5ddaa24 TS |
1701 | gfc_gobble_whitespace (); |
1702 | c = gfc_next_char (); | |
1703 | if ((c == '\n') || (c == ',')) | |
1107b970 PB |
1704 | { |
1705 | /* Check for CHARACTER with no length parameter. */ | |
1706 | if (ts.type == BT_CHARACTER && !ts.cl) | |
1707 | { | |
9d64df18 | 1708 | ts.kind = gfc_default_character_kind; |
1107b970 PB |
1709 | ts.cl = gfc_get_charlen (); |
1710 | ts.cl->next = gfc_current_ns->cl_list; | |
1711 | gfc_current_ns->cl_list = ts.cl; | |
1712 | ts.cl->length = gfc_int_expr (1); | |
1713 | } | |
1714 | ||
1715 | /* Record the Successful match. */ | |
1716 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
1717 | return MATCH_ERROR; | |
1718 | continue; | |
1719 | } | |
e5ddaa24 TS |
1720 | |
1721 | gfc_current_locus = cur_loc; | |
1722 | } | |
1723 | ||
1107b970 PB |
1724 | /* Discard the (incorrectly) matched range. */ |
1725 | gfc_clear_new_implicit (); | |
1726 | ||
1727 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
1728 | if (ts.type == BT_CHARACTER) | |
1729 | m = match_char_spec (&ts); | |
1730 | else | |
e5ddaa24 | 1731 | { |
1107b970 | 1732 | m = gfc_match_kind_spec (&ts); |
e5ddaa24 | 1733 | if (m == MATCH_NO) |
1107b970 PB |
1734 | { |
1735 | m = gfc_match_old_kind_spec (&ts); | |
1736 | if (m == MATCH_ERROR) | |
1737 | goto error; | |
1738 | if (m == MATCH_NO) | |
1739 | goto syntax; | |
1740 | } | |
e5ddaa24 | 1741 | } |
1107b970 PB |
1742 | if (m == MATCH_ERROR) |
1743 | goto error; | |
e5ddaa24 | 1744 | |
1107b970 | 1745 | m = match_implicit_range (); |
e5ddaa24 TS |
1746 | if (m == MATCH_ERROR) |
1747 | goto error; | |
1748 | if (m == MATCH_NO) | |
1749 | goto syntax; | |
1750 | ||
1751 | gfc_gobble_whitespace (); | |
1752 | c = gfc_next_char (); | |
1753 | if ((c != '\n') && (c != ',')) | |
1754 | goto syntax; | |
1755 | ||
1107b970 PB |
1756 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
1757 | return MATCH_ERROR; | |
e5ddaa24 TS |
1758 | } |
1759 | while (c == ','); | |
1760 | ||
1107b970 | 1761 | return MATCH_YES; |
e5ddaa24 TS |
1762 | |
1763 | syntax: | |
1764 | gfc_syntax_error (ST_IMPLICIT); | |
1765 | ||
1766 | error: | |
1767 | return MATCH_ERROR; | |
1768 | } | |
1769 | ||
1770 | ||
6de9cd9a DN |
1771 | /* Matches an attribute specification including array specs. If |
1772 | successful, leaves the variables current_attr and current_as | |
1773 | holding the specification. Also sets the colon_seen variable for | |
1774 | later use by matchers associated with initializations. | |
1775 | ||
1776 | This subroutine is a little tricky in the sense that we don't know | |
1777 | if we really have an attr-spec until we hit the double colon. | |
1778 | Until that time, we can only return MATCH_NO. This forces us to | |
1779 | check for duplicate specification at this level. */ | |
1780 | ||
1781 | static match | |
1782 | match_attr_spec (void) | |
1783 | { | |
1784 | ||
1785 | /* Modifiers that can exist in a type statement. */ | |
1786 | typedef enum | |
1787 | { GFC_DECL_BEGIN = 0, | |
1788 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
1789 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
1790 | DECL_PARAMETER, DECL_POINTER, DECL_PRIVATE, DECL_PUBLIC, DECL_SAVE, | |
1791 | DECL_TARGET, DECL_COLON, DECL_NONE, | |
1792 | GFC_DECL_END /* Sentinel */ | |
1793 | } | |
1794 | decl_types; | |
1795 | ||
1796 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
1797 | #define NUM_DECL GFC_DECL_END | |
1798 | ||
1799 | static mstring decls[] = { | |
1800 | minit (", allocatable", DECL_ALLOCATABLE), | |
1801 | minit (", dimension", DECL_DIMENSION), | |
1802 | minit (", external", DECL_EXTERNAL), | |
1803 | minit (", intent ( in )", DECL_IN), | |
1804 | minit (", intent ( out )", DECL_OUT), | |
1805 | minit (", intent ( in out )", DECL_INOUT), | |
1806 | minit (", intrinsic", DECL_INTRINSIC), | |
1807 | minit (", optional", DECL_OPTIONAL), | |
1808 | minit (", parameter", DECL_PARAMETER), | |
1809 | minit (", pointer", DECL_POINTER), | |
1810 | minit (", private", DECL_PRIVATE), | |
1811 | minit (", public", DECL_PUBLIC), | |
1812 | minit (", save", DECL_SAVE), | |
1813 | minit (", target", DECL_TARGET), | |
1814 | minit ("::", DECL_COLON), | |
1815 | minit (NULL, DECL_NONE) | |
1816 | }; | |
1817 | ||
1818 | locus start, seen_at[NUM_DECL]; | |
1819 | int seen[NUM_DECL]; | |
1820 | decl_types d; | |
1821 | const char *attr; | |
1822 | match m; | |
1823 | try t; | |
1824 | ||
1825 | gfc_clear_attr (¤t_attr); | |
63645982 | 1826 | start = gfc_current_locus; |
6de9cd9a DN |
1827 | |
1828 | current_as = NULL; | |
1829 | colon_seen = 0; | |
1830 | ||
1831 | /* See if we get all of the keywords up to the final double colon. */ | |
1832 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
1833 | seen[d] = 0; | |
1834 | ||
1835 | for (;;) | |
1836 | { | |
1837 | d = (decl_types) gfc_match_strings (decls); | |
1838 | if (d == DECL_NONE || d == DECL_COLON) | |
1839 | break; | |
1840 | ||
1841 | seen[d]++; | |
63645982 | 1842 | seen_at[d] = gfc_current_locus; |
6de9cd9a DN |
1843 | |
1844 | if (d == DECL_DIMENSION) | |
1845 | { | |
1846 | m = gfc_match_array_spec (¤t_as); | |
1847 | ||
1848 | if (m == MATCH_NO) | |
1849 | { | |
1850 | gfc_error ("Missing dimension specification at %C"); | |
1851 | m = MATCH_ERROR; | |
1852 | } | |
1853 | ||
1854 | if (m == MATCH_ERROR) | |
1855 | goto cleanup; | |
1856 | } | |
1857 | } | |
1858 | ||
1859 | /* No double colon, so assume that we've been looking at something | |
1860 | else the whole time. */ | |
1861 | if (d == DECL_NONE) | |
1862 | { | |
1863 | m = MATCH_NO; | |
1864 | goto cleanup; | |
1865 | } | |
1866 | ||
1867 | /* Since we've seen a double colon, we have to be looking at an | |
1868 | attr-spec. This means that we can now issue errors. */ | |
1869 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
1870 | if (seen[d] > 1) | |
1871 | { | |
1872 | switch (d) | |
1873 | { | |
1874 | case DECL_ALLOCATABLE: | |
1875 | attr = "ALLOCATABLE"; | |
1876 | break; | |
1877 | case DECL_DIMENSION: | |
1878 | attr = "DIMENSION"; | |
1879 | break; | |
1880 | case DECL_EXTERNAL: | |
1881 | attr = "EXTERNAL"; | |
1882 | break; | |
1883 | case DECL_IN: | |
1884 | attr = "INTENT (IN)"; | |
1885 | break; | |
1886 | case DECL_OUT: | |
1887 | attr = "INTENT (OUT)"; | |
1888 | break; | |
1889 | case DECL_INOUT: | |
1890 | attr = "INTENT (IN OUT)"; | |
1891 | break; | |
1892 | case DECL_INTRINSIC: | |
1893 | attr = "INTRINSIC"; | |
1894 | break; | |
1895 | case DECL_OPTIONAL: | |
1896 | attr = "OPTIONAL"; | |
1897 | break; | |
1898 | case DECL_PARAMETER: | |
1899 | attr = "PARAMETER"; | |
1900 | break; | |
1901 | case DECL_POINTER: | |
1902 | attr = "POINTER"; | |
1903 | break; | |
1904 | case DECL_PRIVATE: | |
1905 | attr = "PRIVATE"; | |
1906 | break; | |
1907 | case DECL_PUBLIC: | |
1908 | attr = "PUBLIC"; | |
1909 | break; | |
1910 | case DECL_SAVE: | |
1911 | attr = "SAVE"; | |
1912 | break; | |
1913 | case DECL_TARGET: | |
1914 | attr = "TARGET"; | |
1915 | break; | |
1916 | default: | |
1917 | attr = NULL; /* This shouldn't happen */ | |
1918 | } | |
1919 | ||
1920 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
1921 | m = MATCH_ERROR; | |
1922 | goto cleanup; | |
1923 | } | |
1924 | ||
1925 | /* Now that we've dealt with duplicate attributes, add the attributes | |
1926 | to the current attribute. */ | |
1927 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
1928 | { | |
1929 | if (seen[d] == 0) | |
1930 | continue; | |
1931 | ||
1932 | if (gfc_current_state () == COMP_DERIVED | |
1933 | && d != DECL_DIMENSION && d != DECL_POINTER | |
1934 | && d != DECL_COLON && d != DECL_NONE) | |
1935 | { | |
1936 | ||
1937 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
1938 | &seen_at[d]); | |
1939 | m = MATCH_ERROR; | |
1940 | goto cleanup; | |
1941 | } | |
1942 | ||
4213f93b PT |
1943 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
1944 | && gfc_current_state () != COMP_MODULE) | |
1945 | { | |
1946 | if (d == DECL_PRIVATE) | |
1947 | attr = "PRIVATE"; | |
1948 | else | |
1949 | attr = "PUBLIC"; | |
1950 | ||
1951 | gfc_error ("%s attribute at %L is not allowed outside of a MODULE", | |
1952 | attr, &seen_at[d]); | |
1953 | m = MATCH_ERROR; | |
1954 | goto cleanup; | |
1955 | } | |
1956 | ||
6de9cd9a DN |
1957 | switch (d) |
1958 | { | |
1959 | case DECL_ALLOCATABLE: | |
1960 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
1961 | break; | |
1962 | ||
1963 | case DECL_DIMENSION: | |
231b2fcc | 1964 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
1965 | break; |
1966 | ||
1967 | case DECL_EXTERNAL: | |
1968 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
1969 | break; | |
1970 | ||
1971 | case DECL_IN: | |
1972 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
1973 | break; | |
1974 | ||
1975 | case DECL_OUT: | |
1976 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
1977 | break; | |
1978 | ||
1979 | case DECL_INOUT: | |
1980 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
1981 | break; | |
1982 | ||
1983 | case DECL_INTRINSIC: | |
1984 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
1985 | break; | |
1986 | ||
1987 | case DECL_OPTIONAL: | |
1988 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
1989 | break; | |
1990 | ||
1991 | case DECL_PARAMETER: | |
231b2fcc | 1992 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
6de9cd9a DN |
1993 | break; |
1994 | ||
1995 | case DECL_POINTER: | |
1996 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
1997 | break; | |
1998 | ||
1999 | case DECL_PRIVATE: | |
231b2fcc TS |
2000 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
2001 | &seen_at[d]); | |
6de9cd9a DN |
2002 | break; |
2003 | ||
2004 | case DECL_PUBLIC: | |
231b2fcc TS |
2005 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
2006 | &seen_at[d]); | |
6de9cd9a DN |
2007 | break; |
2008 | ||
2009 | case DECL_SAVE: | |
231b2fcc | 2010 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
2011 | break; |
2012 | ||
2013 | case DECL_TARGET: | |
2014 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
2015 | break; | |
2016 | ||
2017 | default: | |
2018 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
2019 | } | |
2020 | ||
2021 | if (t == FAILURE) | |
2022 | { | |
2023 | m = MATCH_ERROR; | |
2024 | goto cleanup; | |
2025 | } | |
2026 | } | |
2027 | ||
2028 | colon_seen = 1; | |
2029 | return MATCH_YES; | |
2030 | ||
2031 | cleanup: | |
63645982 | 2032 | gfc_current_locus = start; |
6de9cd9a DN |
2033 | gfc_free_array_spec (current_as); |
2034 | current_as = NULL; | |
2035 | return m; | |
2036 | } | |
2037 | ||
2038 | ||
2039 | /* Match a data declaration statement. */ | |
2040 | ||
2041 | match | |
2042 | gfc_match_data_decl (void) | |
2043 | { | |
2044 | gfc_symbol *sym; | |
2045 | match m; | |
949d5b72 | 2046 | int elem; |
6de9cd9a | 2047 | |
e5ddaa24 | 2048 | m = match_type_spec (¤t_ts, 0); |
6de9cd9a DN |
2049 | if (m != MATCH_YES) |
2050 | return m; | |
2051 | ||
2052 | if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) | |
2053 | { | |
2054 | sym = gfc_use_derived (current_ts.derived); | |
2055 | ||
2056 | if (sym == NULL) | |
2057 | { | |
2058 | m = MATCH_ERROR; | |
2059 | goto cleanup; | |
2060 | } | |
2061 | ||
2062 | current_ts.derived = sym; | |
2063 | } | |
2064 | ||
2065 | m = match_attr_spec (); | |
2066 | if (m == MATCH_ERROR) | |
2067 | { | |
2068 | m = MATCH_NO; | |
2069 | goto cleanup; | |
2070 | } | |
2071 | ||
2072 | if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL) | |
2073 | { | |
2074 | ||
2075 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
2076 | goto ok; | |
2077 | ||
2078 | if (gfc_find_symbol (current_ts.derived->name, | |
2079 | current_ts.derived->ns->parent, 1, &sym) == 0) | |
2080 | goto ok; | |
2081 | ||
2082 | /* Hope that an ambiguous symbol is itself masked by a type definition. */ | |
2083 | if (sym != NULL && sym->attr.flavor == FL_DERIVED) | |
2084 | goto ok; | |
2085 | ||
2086 | gfc_error ("Derived type at %C has not been previously defined"); | |
2087 | m = MATCH_ERROR; | |
2088 | goto cleanup; | |
2089 | } | |
2090 | ||
2091 | ok: | |
2092 | /* If we have an old-style character declaration, and no new-style | |
2093 | attribute specifications, then there a comma is optional between | |
2094 | the type specification and the variable list. */ | |
2095 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
2096 | gfc_match_char (','); | |
2097 | ||
949d5b72 PT |
2098 | /* Give the types/attributes to symbols that follow. Give the element |
2099 | a number so that repeat character length expressions can be copied. */ | |
2100 | elem = 1; | |
6de9cd9a DN |
2101 | for (;;) |
2102 | { | |
949d5b72 | 2103 | m = variable_decl (elem++); |
6de9cd9a DN |
2104 | if (m == MATCH_ERROR) |
2105 | goto cleanup; | |
2106 | if (m == MATCH_NO) | |
2107 | break; | |
2108 | ||
2109 | if (gfc_match_eos () == MATCH_YES) | |
2110 | goto cleanup; | |
2111 | if (gfc_match_char (',') != MATCH_YES) | |
2112 | break; | |
2113 | } | |
2114 | ||
2115 | gfc_error ("Syntax error in data declaration at %C"); | |
2116 | m = MATCH_ERROR; | |
2117 | ||
2118 | cleanup: | |
2119 | gfc_free_array_spec (current_as); | |
2120 | current_as = NULL; | |
2121 | return m; | |
2122 | } | |
2123 | ||
2124 | ||
2125 | /* Match a prefix associated with a function or subroutine | |
2126 | declaration. If the typespec pointer is nonnull, then a typespec | |
2127 | can be matched. Note that if nothing matches, MATCH_YES is | |
2128 | returned (the null string was matched). */ | |
2129 | ||
2130 | static match | |
2131 | match_prefix (gfc_typespec * ts) | |
2132 | { | |
2133 | int seen_type; | |
2134 | ||
2135 | gfc_clear_attr (¤t_attr); | |
2136 | seen_type = 0; | |
2137 | ||
2138 | loop: | |
2139 | if (!seen_type && ts != NULL | |
e5ddaa24 | 2140 | && match_type_spec (ts, 0) == MATCH_YES |
6de9cd9a DN |
2141 | && gfc_match_space () == MATCH_YES) |
2142 | { | |
2143 | ||
2144 | seen_type = 1; | |
2145 | goto loop; | |
2146 | } | |
2147 | ||
2148 | if (gfc_match ("elemental% ") == MATCH_YES) | |
2149 | { | |
2150 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
2151 | return MATCH_ERROR; | |
2152 | ||
2153 | goto loop; | |
2154 | } | |
2155 | ||
2156 | if (gfc_match ("pure% ") == MATCH_YES) | |
2157 | { | |
2158 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
2159 | return MATCH_ERROR; | |
2160 | ||
2161 | goto loop; | |
2162 | } | |
2163 | ||
2164 | if (gfc_match ("recursive% ") == MATCH_YES) | |
2165 | { | |
2166 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
2167 | return MATCH_ERROR; | |
2168 | ||
2169 | goto loop; | |
2170 | } | |
2171 | ||
2172 | /* At this point, the next item is not a prefix. */ | |
2173 | return MATCH_YES; | |
2174 | } | |
2175 | ||
2176 | ||
2177 | /* Copy attributes matched by match_prefix() to attributes on a symbol. */ | |
2178 | ||
2179 | static try | |
2180 | copy_prefix (symbol_attribute * dest, locus * where) | |
2181 | { | |
2182 | ||
2183 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) | |
2184 | return FAILURE; | |
2185 | ||
2186 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
2187 | return FAILURE; | |
2188 | ||
2189 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
2190 | return FAILURE; | |
2191 | ||
2192 | return SUCCESS; | |
2193 | } | |
2194 | ||
2195 | ||
2196 | /* Match a formal argument list. */ | |
2197 | ||
2198 | match | |
2199 | gfc_match_formal_arglist (gfc_symbol * progname, int st_flag, int null_flag) | |
2200 | { | |
2201 | gfc_formal_arglist *head, *tail, *p, *q; | |
2202 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2203 | gfc_symbol *sym; | |
2204 | match m; | |
2205 | ||
2206 | head = tail = NULL; | |
2207 | ||
2208 | if (gfc_match_char ('(') != MATCH_YES) | |
2209 | { | |
2210 | if (null_flag) | |
2211 | goto ok; | |
2212 | return MATCH_NO; | |
2213 | } | |
2214 | ||
2215 | if (gfc_match_char (')') == MATCH_YES) | |
2216 | goto ok; | |
2217 | ||
2218 | for (;;) | |
2219 | { | |
2220 | if (gfc_match_char ('*') == MATCH_YES) | |
2221 | sym = NULL; | |
2222 | else | |
2223 | { | |
2224 | m = gfc_match_name (name); | |
2225 | if (m != MATCH_YES) | |
2226 | goto cleanup; | |
2227 | ||
2228 | if (gfc_get_symbol (name, NULL, &sym)) | |
2229 | goto cleanup; | |
2230 | } | |
2231 | ||
2232 | p = gfc_get_formal_arglist (); | |
2233 | ||
2234 | if (head == NULL) | |
2235 | head = tail = p; | |
2236 | else | |
2237 | { | |
2238 | tail->next = p; | |
2239 | tail = p; | |
2240 | } | |
2241 | ||
2242 | tail->sym = sym; | |
2243 | ||
2244 | /* We don't add the VARIABLE flavor because the name could be a | |
2245 | dummy procedure. We don't apply these attributes to formal | |
2246 | arguments of statement functions. */ | |
2247 | if (sym != NULL && !st_flag | |
231b2fcc | 2248 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
6de9cd9a DN |
2249 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
2250 | { | |
2251 | m = MATCH_ERROR; | |
2252 | goto cleanup; | |
2253 | } | |
2254 | ||
2255 | /* The name of a program unit can be in a different namespace, | |
2256 | so check for it explicitly. After the statement is accepted, | |
2257 | the name is checked for especially in gfc_get_symbol(). */ | |
2258 | if (gfc_new_block != NULL && sym != NULL | |
2259 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
2260 | { | |
2261 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
2262 | sym->name); | |
2263 | m = MATCH_ERROR; | |
2264 | goto cleanup; | |
2265 | } | |
2266 | ||
2267 | if (gfc_match_char (')') == MATCH_YES) | |
2268 | goto ok; | |
2269 | ||
2270 | m = gfc_match_char (','); | |
2271 | if (m != MATCH_YES) | |
2272 | { | |
2273 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
2274 | goto cleanup; | |
2275 | } | |
2276 | } | |
2277 | ||
2278 | ok: | |
2279 | /* Check for duplicate symbols in the formal argument list. */ | |
2280 | if (head != NULL) | |
2281 | { | |
2282 | for (p = head; p->next; p = p->next) | |
2283 | { | |
2284 | if (p->sym == NULL) | |
2285 | continue; | |
2286 | ||
2287 | for (q = p->next; q; q = q->next) | |
2288 | if (p->sym == q->sym) | |
2289 | { | |
2290 | gfc_error | |
2291 | ("Duplicate symbol '%s' in formal argument list at %C", | |
2292 | p->sym->name); | |
2293 | ||
2294 | m = MATCH_ERROR; | |
2295 | goto cleanup; | |
2296 | } | |
2297 | } | |
2298 | } | |
2299 | ||
2300 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) == | |
2301 | FAILURE) | |
2302 | { | |
2303 | m = MATCH_ERROR; | |
2304 | goto cleanup; | |
2305 | } | |
2306 | ||
2307 | return MATCH_YES; | |
2308 | ||
2309 | cleanup: | |
2310 | gfc_free_formal_arglist (head); | |
2311 | return m; | |
2312 | } | |
2313 | ||
2314 | ||
2315 | /* Match a RESULT specification following a function declaration or | |
2316 | ENTRY statement. Also matches the end-of-statement. */ | |
2317 | ||
2318 | static match | |
2319 | match_result (gfc_symbol * function, gfc_symbol ** result) | |
2320 | { | |
2321 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2322 | gfc_symbol *r; | |
2323 | match m; | |
2324 | ||
2325 | if (gfc_match (" result (") != MATCH_YES) | |
2326 | return MATCH_NO; | |
2327 | ||
2328 | m = gfc_match_name (name); | |
2329 | if (m != MATCH_YES) | |
2330 | return m; | |
2331 | ||
2332 | if (gfc_match (" )%t") != MATCH_YES) | |
2333 | { | |
2334 | gfc_error ("Unexpected junk following RESULT variable at %C"); | |
2335 | return MATCH_ERROR; | |
2336 | } | |
2337 | ||
2338 | if (strcmp (function->name, name) == 0) | |
2339 | { | |
2340 | gfc_error | |
2341 | ("RESULT variable at %C must be different than function name"); | |
2342 | return MATCH_ERROR; | |
2343 | } | |
2344 | ||
2345 | if (gfc_get_symbol (name, NULL, &r)) | |
2346 | return MATCH_ERROR; | |
2347 | ||
231b2fcc TS |
2348 | if (gfc_add_flavor (&r->attr, FL_VARIABLE, r->name, NULL) == FAILURE |
2349 | || gfc_add_result (&r->attr, r->name, NULL) == FAILURE) | |
6de9cd9a DN |
2350 | return MATCH_ERROR; |
2351 | ||
2352 | *result = r; | |
2353 | ||
2354 | return MATCH_YES; | |
2355 | } | |
2356 | ||
2357 | ||
2358 | /* Match a function declaration. */ | |
2359 | ||
2360 | match | |
2361 | gfc_match_function_decl (void) | |
2362 | { | |
2363 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2364 | gfc_symbol *sym, *result; | |
2365 | locus old_loc; | |
2366 | match m; | |
2367 | ||
2368 | if (gfc_current_state () != COMP_NONE | |
2369 | && gfc_current_state () != COMP_INTERFACE | |
2370 | && gfc_current_state () != COMP_CONTAINS) | |
2371 | return MATCH_NO; | |
2372 | ||
2373 | gfc_clear_ts (¤t_ts); | |
2374 | ||
63645982 | 2375 | old_loc = gfc_current_locus; |
6de9cd9a DN |
2376 | |
2377 | m = match_prefix (¤t_ts); | |
2378 | if (m != MATCH_YES) | |
2379 | { | |
63645982 | 2380 | gfc_current_locus = old_loc; |
6de9cd9a DN |
2381 | return m; |
2382 | } | |
2383 | ||
2384 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
2385 | { | |
63645982 | 2386 | gfc_current_locus = old_loc; |
6de9cd9a DN |
2387 | return MATCH_NO; |
2388 | } | |
2389 | ||
2390 | if (get_proc_name (name, &sym)) | |
2391 | return MATCH_ERROR; | |
2392 | gfc_new_block = sym; | |
2393 | ||
2394 | m = gfc_match_formal_arglist (sym, 0, 0); | |
2395 | if (m == MATCH_NO) | |
2396 | gfc_error ("Expected formal argument list in function definition at %C"); | |
2397 | else if (m == MATCH_ERROR) | |
2398 | goto cleanup; | |
2399 | ||
2400 | result = NULL; | |
2401 | ||
2402 | if (gfc_match_eos () != MATCH_YES) | |
2403 | { | |
2404 | /* See if a result variable is present. */ | |
2405 | m = match_result (sym, &result); | |
2406 | if (m == MATCH_NO) | |
2407 | gfc_error ("Unexpected junk after function declaration at %C"); | |
2408 | ||
2409 | if (m != MATCH_YES) | |
2410 | { | |
2411 | m = MATCH_ERROR; | |
2412 | goto cleanup; | |
2413 | } | |
2414 | } | |
2415 | ||
2416 | /* Make changes to the symbol. */ | |
2417 | m = MATCH_ERROR; | |
2418 | ||
231b2fcc | 2419 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
2420 | goto cleanup; |
2421 | ||
2422 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
2423 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
2424 | goto cleanup; | |
2425 | ||
2426 | if (current_ts.type != BT_UNKNOWN && sym->ts.type != BT_UNKNOWN) | |
2427 | { | |
2428 | gfc_error ("Function '%s' at %C already has a type of %s", name, | |
2429 | gfc_basic_typename (sym->ts.type)); | |
2430 | goto cleanup; | |
2431 | } | |
2432 | ||
2433 | if (result == NULL) | |
2434 | { | |
2435 | sym->ts = current_ts; | |
2436 | sym->result = sym; | |
2437 | } | |
2438 | else | |
2439 | { | |
2440 | result->ts = current_ts; | |
2441 | sym->result = result; | |
2442 | } | |
2443 | ||
2444 | return MATCH_YES; | |
2445 | ||
2446 | cleanup: | |
63645982 | 2447 | gfc_current_locus = old_loc; |
6de9cd9a DN |
2448 | return m; |
2449 | } | |
2450 | ||
2451 | ||
2452 | /* Match an ENTRY statement. */ | |
2453 | ||
2454 | match | |
2455 | gfc_match_entry (void) | |
2456 | { | |
3d79abbd PB |
2457 | gfc_symbol *proc; |
2458 | gfc_symbol *result; | |
2459 | gfc_symbol *entry; | |
6de9cd9a DN |
2460 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
2461 | gfc_compile_state state; | |
2462 | match m; | |
3d79abbd | 2463 | gfc_entry_list *el; |
6de9cd9a DN |
2464 | |
2465 | m = gfc_match_name (name); | |
2466 | if (m != MATCH_YES) | |
2467 | return m; | |
2468 | ||
3d79abbd | 2469 | state = gfc_current_state (); |
4c93c95a | 2470 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
3d79abbd | 2471 | { |
4c93c95a FXC |
2472 | switch (state) |
2473 | { | |
2474 | case COMP_PROGRAM: | |
2475 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
2476 | break; | |
2477 | case COMP_MODULE: | |
2478 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
2479 | break; | |
2480 | case COMP_BLOCK_DATA: | |
2481 | gfc_error | |
2482 | ("ENTRY statement at %C cannot appear within a BLOCK DATA"); | |
2483 | break; | |
2484 | case COMP_INTERFACE: | |
2485 | gfc_error | |
2486 | ("ENTRY statement at %C cannot appear within an INTERFACE"); | |
2487 | break; | |
2488 | case COMP_DERIVED: | |
2489 | gfc_error | |
2490 | ("ENTRY statement at %C cannot appear " | |
2491 | "within a DERIVED TYPE block"); | |
2492 | break; | |
2493 | case COMP_IF: | |
2494 | gfc_error | |
2495 | ("ENTRY statement at %C cannot appear within an IF-THEN block"); | |
2496 | break; | |
2497 | case COMP_DO: | |
2498 | gfc_error | |
2499 | ("ENTRY statement at %C cannot appear within a DO block"); | |
2500 | break; | |
2501 | case COMP_SELECT: | |
2502 | gfc_error | |
2503 | ("ENTRY statement at %C cannot appear within a SELECT block"); | |
2504 | break; | |
2505 | case COMP_FORALL: | |
2506 | gfc_error | |
2507 | ("ENTRY statement at %C cannot appear within a FORALL block"); | |
2508 | break; | |
2509 | case COMP_WHERE: | |
2510 | gfc_error | |
2511 | ("ENTRY statement at %C cannot appear within a WHERE block"); | |
2512 | break; | |
2513 | case COMP_CONTAINS: | |
2514 | gfc_error | |
2515 | ("ENTRY statement at %C cannot appear " | |
2516 | "within a contained subprogram"); | |
2517 | break; | |
2518 | default: | |
2519 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
2520 | } | |
3d79abbd PB |
2521 | return MATCH_ERROR; |
2522 | } | |
2523 | ||
2524 | if (gfc_current_ns->parent != NULL | |
2525 | && gfc_current_ns->parent->proc_name | |
2526 | && gfc_current_ns->parent->proc_name->attr.flavor != FL_MODULE) | |
2527 | { | |
2528 | gfc_error("ENTRY statement at %C cannot appear in a " | |
2529 | "contained procedure"); | |
2530 | return MATCH_ERROR; | |
2531 | } | |
2532 | ||
6de9cd9a DN |
2533 | if (get_proc_name (name, &entry)) |
2534 | return MATCH_ERROR; | |
2535 | ||
3d79abbd PB |
2536 | proc = gfc_current_block (); |
2537 | ||
2538 | if (state == COMP_SUBROUTINE) | |
6de9cd9a | 2539 | { |
231b2fcc | 2540 | /* An entry in a subroutine. */ |
6de9cd9a DN |
2541 | m = gfc_match_formal_arglist (entry, 0, 1); |
2542 | if (m != MATCH_YES) | |
2543 | return MATCH_ERROR; | |
2544 | ||
231b2fcc TS |
2545 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
2546 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a | 2547 | return MATCH_ERROR; |
3d79abbd PB |
2548 | } |
2549 | else | |
2550 | { | |
2551 | /* An entry in a function. */ | |
3c2d01f1 | 2552 | m = gfc_match_formal_arglist (entry, 0, 1); |
6de9cd9a DN |
2553 | if (m != MATCH_YES) |
2554 | return MATCH_ERROR; | |
2555 | ||
6de9cd9a DN |
2556 | result = NULL; |
2557 | ||
2558 | if (gfc_match_eos () == MATCH_YES) | |
2559 | { | |
231b2fcc TS |
2560 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
2561 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a DN |
2562 | return MATCH_ERROR; |
2563 | ||
d198b59a | 2564 | entry->result = entry; |
6de9cd9a DN |
2565 | } |
2566 | else | |
2567 | { | |
3d79abbd | 2568 | m = match_result (proc, &result); |
6de9cd9a DN |
2569 | if (m == MATCH_NO) |
2570 | gfc_syntax_error (ST_ENTRY); | |
2571 | if (m != MATCH_YES) | |
2572 | return MATCH_ERROR; | |
2573 | ||
231b2fcc TS |
2574 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE |
2575 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
2576 | || gfc_add_function (&entry->attr, result->name, | |
2577 | NULL) == FAILURE) | |
6de9cd9a | 2578 | return MATCH_ERROR; |
d198b59a JJ |
2579 | |
2580 | entry->result = result; | |
6de9cd9a DN |
2581 | } |
2582 | ||
3d79abbd | 2583 | if (proc->attr.recursive && result == NULL) |
6de9cd9a DN |
2584 | { |
2585 | gfc_error ("RESULT attribute required in ENTRY statement at %C"); | |
2586 | return MATCH_ERROR; | |
2587 | } | |
6de9cd9a DN |
2588 | } |
2589 | ||
2590 | if (gfc_match_eos () != MATCH_YES) | |
2591 | { | |
2592 | gfc_syntax_error (ST_ENTRY); | |
2593 | return MATCH_ERROR; | |
2594 | } | |
2595 | ||
3d79abbd PB |
2596 | entry->attr.recursive = proc->attr.recursive; |
2597 | entry->attr.elemental = proc->attr.elemental; | |
2598 | entry->attr.pure = proc->attr.pure; | |
6de9cd9a | 2599 | |
3d79abbd PB |
2600 | el = gfc_get_entry_list (); |
2601 | el->sym = entry; | |
2602 | el->next = gfc_current_ns->entries; | |
2603 | gfc_current_ns->entries = el; | |
2604 | if (el->next) | |
2605 | el->id = el->next->id + 1; | |
2606 | else | |
2607 | el->id = 1; | |
6de9cd9a | 2608 | |
3d79abbd PB |
2609 | new_st.op = EXEC_ENTRY; |
2610 | new_st.ext.entry = el; | |
2611 | ||
2612 | return MATCH_YES; | |
6de9cd9a DN |
2613 | } |
2614 | ||
2615 | ||
2616 | /* Match a subroutine statement, including optional prefixes. */ | |
2617 | ||
2618 | match | |
2619 | gfc_match_subroutine (void) | |
2620 | { | |
2621 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2622 | gfc_symbol *sym; | |
2623 | match m; | |
2624 | ||
2625 | if (gfc_current_state () != COMP_NONE | |
2626 | && gfc_current_state () != COMP_INTERFACE | |
2627 | && gfc_current_state () != COMP_CONTAINS) | |
2628 | return MATCH_NO; | |
2629 | ||
2630 | m = match_prefix (NULL); | |
2631 | if (m != MATCH_YES) | |
2632 | return m; | |
2633 | ||
2634 | m = gfc_match ("subroutine% %n", name); | |
2635 | if (m != MATCH_YES) | |
2636 | return m; | |
2637 | ||
2638 | if (get_proc_name (name, &sym)) | |
2639 | return MATCH_ERROR; | |
2640 | gfc_new_block = sym; | |
2641 | ||
231b2fcc | 2642 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
2643 | return MATCH_ERROR; |
2644 | ||
2645 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
2646 | return MATCH_ERROR; | |
2647 | ||
2648 | if (gfc_match_eos () != MATCH_YES) | |
2649 | { | |
2650 | gfc_syntax_error (ST_SUBROUTINE); | |
2651 | return MATCH_ERROR; | |
2652 | } | |
2653 | ||
2654 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
2655 | return MATCH_ERROR; | |
2656 | ||
2657 | return MATCH_YES; | |
2658 | } | |
2659 | ||
2660 | ||
1f2959f0 | 2661 | /* Return nonzero if we're currently compiling a contained procedure. */ |
ddc9ce91 TS |
2662 | |
2663 | static int | |
2664 | contained_procedure (void) | |
2665 | { | |
2666 | gfc_state_data *s; | |
2667 | ||
2668 | for (s=gfc_state_stack; s; s=s->previous) | |
2669 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) | |
2670 | && s->previous != NULL | |
2671 | && s->previous->state == COMP_CONTAINS) | |
2672 | return 1; | |
2673 | ||
2674 | return 0; | |
2675 | } | |
2676 | ||
6de9cd9a DN |
2677 | /* Match any of the various end-block statements. Returns the type of |
2678 | END to the caller. The END INTERFACE, END IF, END DO and END | |
2679 | SELECT statements cannot be replaced by a single END statement. */ | |
2680 | ||
2681 | match | |
2682 | gfc_match_end (gfc_statement * st) | |
2683 | { | |
2684 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2685 | gfc_compile_state state; | |
2686 | locus old_loc; | |
2687 | const char *block_name; | |
2688 | const char *target; | |
ddc9ce91 | 2689 | int eos_ok; |
6de9cd9a DN |
2690 | match m; |
2691 | ||
63645982 | 2692 | old_loc = gfc_current_locus; |
6de9cd9a DN |
2693 | if (gfc_match ("end") != MATCH_YES) |
2694 | return MATCH_NO; | |
2695 | ||
2696 | state = gfc_current_state (); | |
2697 | block_name = | |
2698 | gfc_current_block () == NULL ? NULL : gfc_current_block ()->name; | |
2699 | ||
2700 | if (state == COMP_CONTAINS) | |
2701 | { | |
2702 | state = gfc_state_stack->previous->state; | |
2703 | block_name = gfc_state_stack->previous->sym == NULL ? NULL | |
2704 | : gfc_state_stack->previous->sym->name; | |
2705 | } | |
2706 | ||
2707 | switch (state) | |
2708 | { | |
2709 | case COMP_NONE: | |
2710 | case COMP_PROGRAM: | |
2711 | *st = ST_END_PROGRAM; | |
2712 | target = " program"; | |
ddc9ce91 | 2713 | eos_ok = 1; |
6de9cd9a DN |
2714 | break; |
2715 | ||
2716 | case COMP_SUBROUTINE: | |
2717 | *st = ST_END_SUBROUTINE; | |
2718 | target = " subroutine"; | |
ddc9ce91 | 2719 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
2720 | break; |
2721 | ||
2722 | case COMP_FUNCTION: | |
2723 | *st = ST_END_FUNCTION; | |
2724 | target = " function"; | |
ddc9ce91 | 2725 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
2726 | break; |
2727 | ||
2728 | case COMP_BLOCK_DATA: | |
2729 | *st = ST_END_BLOCK_DATA; | |
2730 | target = " block data"; | |
ddc9ce91 | 2731 | eos_ok = 1; |
6de9cd9a DN |
2732 | break; |
2733 | ||
2734 | case COMP_MODULE: | |
2735 | *st = ST_END_MODULE; | |
2736 | target = " module"; | |
ddc9ce91 | 2737 | eos_ok = 1; |
6de9cd9a DN |
2738 | break; |
2739 | ||
2740 | case COMP_INTERFACE: | |
2741 | *st = ST_END_INTERFACE; | |
2742 | target = " interface"; | |
ddc9ce91 | 2743 | eos_ok = 0; |
6de9cd9a DN |
2744 | break; |
2745 | ||
2746 | case COMP_DERIVED: | |
2747 | *st = ST_END_TYPE; | |
2748 | target = " type"; | |
ddc9ce91 | 2749 | eos_ok = 0; |
6de9cd9a DN |
2750 | break; |
2751 | ||
2752 | case COMP_IF: | |
2753 | *st = ST_ENDIF; | |
2754 | target = " if"; | |
ddc9ce91 | 2755 | eos_ok = 0; |
6de9cd9a DN |
2756 | break; |
2757 | ||
2758 | case COMP_DO: | |
2759 | *st = ST_ENDDO; | |
2760 | target = " do"; | |
ddc9ce91 | 2761 | eos_ok = 0; |
6de9cd9a DN |
2762 | break; |
2763 | ||
2764 | case COMP_SELECT: | |
2765 | *st = ST_END_SELECT; | |
2766 | target = " select"; | |
ddc9ce91 | 2767 | eos_ok = 0; |
6de9cd9a DN |
2768 | break; |
2769 | ||
2770 | case COMP_FORALL: | |
2771 | *st = ST_END_FORALL; | |
2772 | target = " forall"; | |
ddc9ce91 | 2773 | eos_ok = 0; |
6de9cd9a DN |
2774 | break; |
2775 | ||
2776 | case COMP_WHERE: | |
2777 | *st = ST_END_WHERE; | |
2778 | target = " where"; | |
ddc9ce91 | 2779 | eos_ok = 0; |
6de9cd9a DN |
2780 | break; |
2781 | ||
2782 | default: | |
2783 | gfc_error ("Unexpected END statement at %C"); | |
2784 | goto cleanup; | |
2785 | } | |
2786 | ||
2787 | if (gfc_match_eos () == MATCH_YES) | |
2788 | { | |
ddc9ce91 | 2789 | if (!eos_ok) |
6de9cd9a | 2790 | { |
ddc9ce91 | 2791 | /* We would have required END [something] */ |
59ce85b5 TS |
2792 | gfc_error ("%s statement expected at %L", |
2793 | gfc_ascii_statement (*st), &old_loc); | |
6de9cd9a DN |
2794 | goto cleanup; |
2795 | } | |
2796 | ||
2797 | return MATCH_YES; | |
2798 | } | |
2799 | ||
2800 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
2801 | if (gfc_match (target) != MATCH_YES) | |
2802 | { | |
2803 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
2804 | goto cleanup; | |
2805 | } | |
2806 | ||
2807 | /* If we're at the end, make sure a block name wasn't required. */ | |
2808 | if (gfc_match_eos () == MATCH_YES) | |
2809 | { | |
2810 | ||
2811 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT) | |
2812 | return MATCH_YES; | |
2813 | ||
2814 | if (gfc_current_block () == NULL) | |
2815 | return MATCH_YES; | |
2816 | ||
2817 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
2818 | block_name, gfc_ascii_statement (*st)); | |
2819 | ||
2820 | return MATCH_ERROR; | |
2821 | } | |
2822 | ||
2823 | /* END INTERFACE has a special handler for its several possible endings. */ | |
2824 | if (*st == ST_END_INTERFACE) | |
2825 | return gfc_match_end_interface (); | |
2826 | ||
2827 | /* We haven't hit the end of statement, so what is left must be an end-name. */ | |
2828 | m = gfc_match_space (); | |
2829 | if (m == MATCH_YES) | |
2830 | m = gfc_match_name (name); | |
2831 | ||
2832 | if (m == MATCH_NO) | |
2833 | gfc_error ("Expected terminating name at %C"); | |
2834 | if (m != MATCH_YES) | |
2835 | goto cleanup; | |
2836 | ||
2837 | if (block_name == NULL) | |
2838 | goto syntax; | |
2839 | ||
2840 | if (strcmp (name, block_name) != 0) | |
2841 | { | |
2842 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
2843 | gfc_ascii_statement (*st)); | |
2844 | goto cleanup; | |
2845 | } | |
2846 | ||
2847 | if (gfc_match_eos () == MATCH_YES) | |
2848 | return MATCH_YES; | |
2849 | ||
2850 | syntax: | |
2851 | gfc_syntax_error (*st); | |
2852 | ||
2853 | cleanup: | |
63645982 | 2854 | gfc_current_locus = old_loc; |
6de9cd9a DN |
2855 | return MATCH_ERROR; |
2856 | } | |
2857 | ||
2858 | ||
2859 | ||
2860 | /***************** Attribute declaration statements ****************/ | |
2861 | ||
2862 | /* Set the attribute of a single variable. */ | |
2863 | ||
2864 | static match | |
2865 | attr_decl1 (void) | |
2866 | { | |
2867 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2868 | gfc_array_spec *as; | |
2869 | gfc_symbol *sym; | |
2870 | locus var_locus; | |
2871 | match m; | |
2872 | ||
2873 | as = NULL; | |
2874 | ||
2875 | m = gfc_match_name (name); | |
2876 | if (m != MATCH_YES) | |
2877 | goto cleanup; | |
2878 | ||
2879 | if (find_special (name, &sym)) | |
2880 | return MATCH_ERROR; | |
2881 | ||
63645982 | 2882 | var_locus = gfc_current_locus; |
6de9cd9a DN |
2883 | |
2884 | /* Deal with possible array specification for certain attributes. */ | |
2885 | if (current_attr.dimension | |
2886 | || current_attr.allocatable | |
2887 | || current_attr.pointer | |
2888 | || current_attr.target) | |
2889 | { | |
2890 | m = gfc_match_array_spec (&as); | |
2891 | if (m == MATCH_ERROR) | |
2892 | goto cleanup; | |
2893 | ||
2894 | if (current_attr.dimension && m == MATCH_NO) | |
2895 | { | |
2896 | gfc_error | |
2897 | ("Missing array specification at %L in DIMENSION statement", | |
2898 | &var_locus); | |
2899 | m = MATCH_ERROR; | |
2900 | goto cleanup; | |
2901 | } | |
2902 | ||
2903 | if ((current_attr.allocatable || current_attr.pointer) | |
2904 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
2905 | { | |
2906 | gfc_error ("Array specification must be deferred at %L", | |
2907 | &var_locus); | |
2908 | m = MATCH_ERROR; | |
2909 | goto cleanup; | |
2910 | } | |
2911 | } | |
2912 | ||
2913 | /* Update symbol table. DIMENSION attribute is set in gfc_set_array_spec(). */ | |
2914 | if (current_attr.dimension == 0 | |
2915 | && gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
2916 | { | |
2917 | m = MATCH_ERROR; | |
2918 | goto cleanup; | |
2919 | } | |
2920 | ||
2921 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
2922 | { | |
2923 | m = MATCH_ERROR; | |
2924 | goto cleanup; | |
2925 | } | |
83d890b9 AL |
2926 | |
2927 | if (sym->attr.cray_pointee && sym->as != NULL) | |
2928 | { | |
2929 | /* Fix the array spec. */ | |
2930 | m = gfc_mod_pointee_as (sym->as); | |
2931 | if (m == MATCH_ERROR) | |
2932 | goto cleanup; | |
2933 | } | |
6de9cd9a DN |
2934 | |
2935 | if ((current_attr.external || current_attr.intrinsic) | |
2936 | && sym->attr.flavor != FL_PROCEDURE | |
231b2fcc | 2937 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
2938 | { |
2939 | m = MATCH_ERROR; | |
2940 | goto cleanup; | |
2941 | } | |
2942 | ||
2943 | return MATCH_YES; | |
2944 | ||
2945 | cleanup: | |
2946 | gfc_free_array_spec (as); | |
2947 | return m; | |
2948 | } | |
2949 | ||
2950 | ||
2951 | /* Generic attribute declaration subroutine. Used for attributes that | |
2952 | just have a list of names. */ | |
2953 | ||
2954 | static match | |
2955 | attr_decl (void) | |
2956 | { | |
2957 | match m; | |
2958 | ||
2959 | /* Gobble the optional double colon, by simply ignoring the result | |
2960 | of gfc_match(). */ | |
2961 | gfc_match (" ::"); | |
2962 | ||
2963 | for (;;) | |
2964 | { | |
2965 | m = attr_decl1 (); | |
2966 | if (m != MATCH_YES) | |
2967 | break; | |
2968 | ||
2969 | if (gfc_match_eos () == MATCH_YES) | |
2970 | { | |
2971 | m = MATCH_YES; | |
2972 | break; | |
2973 | } | |
2974 | ||
2975 | if (gfc_match_char (',') != MATCH_YES) | |
2976 | { | |
2977 | gfc_error ("Unexpected character in variable list at %C"); | |
2978 | m = MATCH_ERROR; | |
2979 | break; | |
2980 | } | |
2981 | } | |
2982 | ||
2983 | return m; | |
2984 | } | |
2985 | ||
2986 | ||
83d890b9 AL |
2987 | /* This routine matches Cray Pointer declarations of the form: |
2988 | pointer ( <pointer>, <pointee> ) | |
2989 | or | |
2990 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... | |
2991 | The pointer, if already declared, should be an integer. Otherwise, we | |
2992 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may | |
2993 | be either a scalar, or an array declaration. No space is allocated for | |
2994 | the pointee. For the statement | |
2995 | pointer (ipt, ar(10)) | |
2996 | any subsequent uses of ar will be translated (in C-notation) as | |
2997 | ar(i) => ((<type> *) ipt)(i) | |
b122dc6a | 2998 | After gimplification, pointee variable will disappear in the code. */ |
83d890b9 AL |
2999 | |
3000 | static match | |
3001 | cray_pointer_decl (void) | |
3002 | { | |
3003 | match m; | |
3004 | gfc_array_spec *as; | |
3005 | gfc_symbol *cptr; /* Pointer symbol. */ | |
3006 | gfc_symbol *cpte; /* Pointee symbol. */ | |
3007 | locus var_locus; | |
3008 | bool done = false; | |
3009 | ||
3010 | while (!done) | |
3011 | { | |
3012 | if (gfc_match_char ('(') != MATCH_YES) | |
3013 | { | |
3014 | gfc_error ("Expected '(' at %C"); | |
3015 | return MATCH_ERROR; | |
3016 | } | |
3017 | ||
3018 | /* Match pointer. */ | |
3019 | var_locus = gfc_current_locus; | |
3020 | gfc_clear_attr (¤t_attr); | |
3021 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
3022 | current_ts.type = BT_INTEGER; | |
3023 | current_ts.kind = gfc_index_integer_kind; | |
3024 | ||
3025 | m = gfc_match_symbol (&cptr, 0); | |
3026 | if (m != MATCH_YES) | |
3027 | { | |
3028 | gfc_error ("Expected variable name at %C"); | |
3029 | return m; | |
3030 | } | |
3031 | ||
3032 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) | |
3033 | return MATCH_ERROR; | |
3034 | ||
3035 | gfc_set_sym_referenced (cptr); | |
3036 | ||
3037 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
3038 | { | |
3039 | cptr->ts.type = BT_INTEGER; | |
3040 | cptr->ts.kind = gfc_index_integer_kind; | |
3041 | } | |
3042 | else if (cptr->ts.type != BT_INTEGER) | |
3043 | { | |
3044 | gfc_error ("Cray pointer at %C must be an integer."); | |
3045 | return MATCH_ERROR; | |
3046 | } | |
3047 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
3048 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
3049 | " memory addresses require %d bytes.", | |
3050 | cptr->ts.kind, | |
3051 | gfc_index_integer_kind); | |
3052 | ||
3053 | if (gfc_match_char (',') != MATCH_YES) | |
3054 | { | |
3055 | gfc_error ("Expected \",\" at %C"); | |
3056 | return MATCH_ERROR; | |
3057 | } | |
3058 | ||
3059 | /* Match Pointee. */ | |
3060 | var_locus = gfc_current_locus; | |
3061 | gfc_clear_attr (¤t_attr); | |
3062 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
3063 | current_ts.type = BT_UNKNOWN; | |
3064 | current_ts.kind = 0; | |
3065 | ||
3066 | m = gfc_match_symbol (&cpte, 0); | |
3067 | if (m != MATCH_YES) | |
3068 | { | |
3069 | gfc_error ("Expected variable name at %C"); | |
3070 | return m; | |
3071 | } | |
3072 | ||
3073 | /* Check for an optional array spec. */ | |
3074 | m = gfc_match_array_spec (&as); | |
3075 | if (m == MATCH_ERROR) | |
3076 | { | |
3077 | gfc_free_array_spec (as); | |
3078 | return m; | |
3079 | } | |
3080 | else if (m == MATCH_NO) | |
3081 | { | |
3082 | gfc_free_array_spec (as); | |
3083 | as = NULL; | |
3084 | } | |
3085 | ||
3086 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
3087 | return MATCH_ERROR; | |
3088 | ||
3089 | gfc_set_sym_referenced (cpte); | |
3090 | ||
3091 | if (cpte->as == NULL) | |
3092 | { | |
3093 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
3094 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
3095 | } | |
3096 | else if (as != NULL) | |
3097 | { | |
3098 | gfc_error ("Duplicate array spec for Cray pointee at %C."); | |
3099 | gfc_free_array_spec (as); | |
3100 | return MATCH_ERROR; | |
3101 | } | |
3102 | ||
3103 | as = NULL; | |
3104 | ||
3105 | if (cpte->as != NULL) | |
3106 | { | |
3107 | /* Fix array spec. */ | |
3108 | m = gfc_mod_pointee_as (cpte->as); | |
3109 | if (m == MATCH_ERROR) | |
3110 | return m; | |
3111 | } | |
3112 | ||
3113 | /* Point the Pointee at the Pointer. */ | |
b122dc6a | 3114 | cpte->cp_pointer = cptr; |
83d890b9 AL |
3115 | |
3116 | if (gfc_match_char (')') != MATCH_YES) | |
3117 | { | |
3118 | gfc_error ("Expected \")\" at %C"); | |
3119 | return MATCH_ERROR; | |
3120 | } | |
3121 | m = gfc_match_char (','); | |
3122 | if (m != MATCH_YES) | |
3123 | done = true; /* Stop searching for more declarations. */ | |
3124 | ||
3125 | } | |
3126 | ||
3127 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
3128 | || gfc_match_eos () != MATCH_YES) | |
3129 | { | |
3130 | gfc_error ("Expected \",\" or end of statement at %C"); | |
3131 | return MATCH_ERROR; | |
3132 | } | |
3133 | return MATCH_YES; | |
3134 | } | |
3135 | ||
3136 | ||
6de9cd9a DN |
3137 | match |
3138 | gfc_match_external (void) | |
3139 | { | |
3140 | ||
3141 | gfc_clear_attr (¤t_attr); | |
3142 | gfc_add_external (¤t_attr, NULL); | |
3143 | ||
3144 | return attr_decl (); | |
3145 | } | |
3146 | ||
3147 | ||
3148 | ||
3149 | match | |
3150 | gfc_match_intent (void) | |
3151 | { | |
3152 | sym_intent intent; | |
3153 | ||
3154 | intent = match_intent_spec (); | |
3155 | if (intent == INTENT_UNKNOWN) | |
3156 | return MATCH_ERROR; | |
3157 | ||
3158 | gfc_clear_attr (¤t_attr); | |
3159 | gfc_add_intent (¤t_attr, intent, NULL); /* Can't fail */ | |
3160 | ||
3161 | return attr_decl (); | |
3162 | } | |
3163 | ||
3164 | ||
3165 | match | |
3166 | gfc_match_intrinsic (void) | |
3167 | { | |
3168 | ||
3169 | gfc_clear_attr (¤t_attr); | |
3170 | gfc_add_intrinsic (¤t_attr, NULL); | |
3171 | ||
3172 | return attr_decl (); | |
3173 | } | |
3174 | ||
3175 | ||
3176 | match | |
3177 | gfc_match_optional (void) | |
3178 | { | |
3179 | ||
3180 | gfc_clear_attr (¤t_attr); | |
3181 | gfc_add_optional (¤t_attr, NULL); | |
3182 | ||
3183 | return attr_decl (); | |
3184 | } | |
3185 | ||
3186 | ||
3187 | match | |
3188 | gfc_match_pointer (void) | |
3189 | { | |
83d890b9 AL |
3190 | gfc_gobble_whitespace (); |
3191 | if (gfc_peek_char () == '(') | |
3192 | { | |
3193 | if (!gfc_option.flag_cray_pointer) | |
3194 | { | |
3195 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer" | |
3196 | " flag."); | |
3197 | return MATCH_ERROR; | |
3198 | } | |
3199 | return cray_pointer_decl (); | |
3200 | } | |
3201 | else | |
3202 | { | |
3203 | gfc_clear_attr (¤t_attr); | |
3204 | gfc_add_pointer (¤t_attr, NULL); | |
3205 | ||
3206 | return attr_decl (); | |
3207 | } | |
6de9cd9a DN |
3208 | } |
3209 | ||
3210 | ||
3211 | match | |
3212 | gfc_match_allocatable (void) | |
3213 | { | |
3214 | ||
3215 | gfc_clear_attr (¤t_attr); | |
3216 | gfc_add_allocatable (¤t_attr, NULL); | |
3217 | ||
3218 | return attr_decl (); | |
3219 | } | |
3220 | ||
3221 | ||
3222 | match | |
3223 | gfc_match_dimension (void) | |
3224 | { | |
3225 | ||
3226 | gfc_clear_attr (¤t_attr); | |
231b2fcc | 3227 | gfc_add_dimension (¤t_attr, NULL, NULL); |
6de9cd9a DN |
3228 | |
3229 | return attr_decl (); | |
3230 | } | |
3231 | ||
3232 | ||
3233 | match | |
3234 | gfc_match_target (void) | |
3235 | { | |
3236 | ||
3237 | gfc_clear_attr (¤t_attr); | |
3238 | gfc_add_target (¤t_attr, NULL); | |
3239 | ||
3240 | return attr_decl (); | |
3241 | } | |
3242 | ||
3243 | ||
3244 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
3245 | statement. */ | |
3246 | ||
3247 | static match | |
3248 | access_attr_decl (gfc_statement st) | |
3249 | { | |
3250 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3251 | interface_type type; | |
3252 | gfc_user_op *uop; | |
3253 | gfc_symbol *sym; | |
3254 | gfc_intrinsic_op operator; | |
3255 | match m; | |
3256 | ||
3257 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
3258 | goto done; | |
3259 | ||
3260 | for (;;) | |
3261 | { | |
3262 | m = gfc_match_generic_spec (&type, name, &operator); | |
3263 | if (m == MATCH_NO) | |
3264 | goto syntax; | |
3265 | if (m == MATCH_ERROR) | |
3266 | return MATCH_ERROR; | |
3267 | ||
3268 | switch (type) | |
3269 | { | |
3270 | case INTERFACE_NAMELESS: | |
3271 | goto syntax; | |
3272 | ||
3273 | case INTERFACE_GENERIC: | |
3274 | if (gfc_get_symbol (name, NULL, &sym)) | |
3275 | goto done; | |
3276 | ||
3277 | if (gfc_add_access (&sym->attr, | |
3278 | (st == | |
3279 | ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
231b2fcc | 3280 | sym->name, NULL) == FAILURE) |
6de9cd9a DN |
3281 | return MATCH_ERROR; |
3282 | ||
3283 | break; | |
3284 | ||
3285 | case INTERFACE_INTRINSIC_OP: | |
3286 | if (gfc_current_ns->operator_access[operator] == ACCESS_UNKNOWN) | |
3287 | { | |
3288 | gfc_current_ns->operator_access[operator] = | |
3289 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
3290 | } | |
3291 | else | |
3292 | { | |
3293 | gfc_error ("Access specification of the %s operator at %C has " | |
3294 | "already been specified", gfc_op2string (operator)); | |
3295 | goto done; | |
3296 | } | |
3297 | ||
3298 | break; | |
3299 | ||
3300 | case INTERFACE_USER_OP: | |
3301 | uop = gfc_get_uop (name); | |
3302 | ||
3303 | if (uop->access == ACCESS_UNKNOWN) | |
3304 | { | |
3305 | uop->access = | |
3306 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
3307 | } | |
3308 | else | |
3309 | { | |
3310 | gfc_error | |
3311 | ("Access specification of the .%s. operator at %C has " | |
3312 | "already been specified", sym->name); | |
3313 | goto done; | |
3314 | } | |
3315 | ||
3316 | break; | |
3317 | } | |
3318 | ||
3319 | if (gfc_match_char (',') == MATCH_NO) | |
3320 | break; | |
3321 | } | |
3322 | ||
3323 | if (gfc_match_eos () != MATCH_YES) | |
3324 | goto syntax; | |
3325 | return MATCH_YES; | |
3326 | ||
3327 | syntax: | |
3328 | gfc_syntax_error (st); | |
3329 | ||
3330 | done: | |
3331 | return MATCH_ERROR; | |
3332 | } | |
3333 | ||
3334 | ||
3335 | /* The PRIVATE statement is a bit weird in that it can be a attribute | |
3336 | declaration, but also works as a standlone statement inside of a | |
3337 | type declaration or a module. */ | |
3338 | ||
3339 | match | |
3340 | gfc_match_private (gfc_statement * st) | |
3341 | { | |
3342 | ||
3343 | if (gfc_match ("private") != MATCH_YES) | |
3344 | return MATCH_NO; | |
3345 | ||
3346 | if (gfc_current_state () == COMP_DERIVED) | |
3347 | { | |
3348 | if (gfc_match_eos () == MATCH_YES) | |
3349 | { | |
3350 | *st = ST_PRIVATE; | |
3351 | return MATCH_YES; | |
3352 | } | |
3353 | ||
3354 | gfc_syntax_error (ST_PRIVATE); | |
3355 | return MATCH_ERROR; | |
3356 | } | |
3357 | ||
3358 | if (gfc_match_eos () == MATCH_YES) | |
3359 | { | |
3360 | *st = ST_PRIVATE; | |
3361 | return MATCH_YES; | |
3362 | } | |
3363 | ||
3364 | *st = ST_ATTR_DECL; | |
3365 | return access_attr_decl (ST_PRIVATE); | |
3366 | } | |
3367 | ||
3368 | ||
3369 | match | |
3370 | gfc_match_public (gfc_statement * st) | |
3371 | { | |
3372 | ||
3373 | if (gfc_match ("public") != MATCH_YES) | |
3374 | return MATCH_NO; | |
3375 | ||
3376 | if (gfc_match_eos () == MATCH_YES) | |
3377 | { | |
3378 | *st = ST_PUBLIC; | |
3379 | return MATCH_YES; | |
3380 | } | |
3381 | ||
3382 | *st = ST_ATTR_DECL; | |
3383 | return access_attr_decl (ST_PUBLIC); | |
3384 | } | |
3385 | ||
3386 | ||
3387 | /* Workhorse for gfc_match_parameter. */ | |
3388 | ||
3389 | static match | |
3390 | do_parm (void) | |
3391 | { | |
3392 | gfc_symbol *sym; | |
3393 | gfc_expr *init; | |
3394 | match m; | |
3395 | ||
3396 | m = gfc_match_symbol (&sym, 0); | |
3397 | if (m == MATCH_NO) | |
3398 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
3399 | ||
3400 | if (m != MATCH_YES) | |
3401 | return m; | |
3402 | ||
3403 | if (gfc_match_char ('=') == MATCH_NO) | |
3404 | { | |
3405 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
3406 | return MATCH_ERROR; | |
3407 | } | |
3408 | ||
3409 | m = gfc_match_init_expr (&init); | |
3410 | if (m == MATCH_NO) | |
3411 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
3412 | if (m != MATCH_YES) | |
3413 | return m; | |
3414 | ||
3415 | if (sym->ts.type == BT_UNKNOWN | |
3416 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
3417 | { | |
3418 | m = MATCH_ERROR; | |
3419 | goto cleanup; | |
3420 | } | |
3421 | ||
3422 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
231b2fcc | 3423 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
3424 | { |
3425 | m = MATCH_ERROR; | |
3426 | goto cleanup; | |
3427 | } | |
3428 | ||
7e2eba4b DE |
3429 | if (sym->ts.type == BT_CHARACTER |
3430 | && sym->ts.cl != NULL | |
3431 | && sym->ts.cl->length != NULL | |
3432 | && sym->ts.cl->length->expr_type == EXPR_CONSTANT | |
3433 | && init->expr_type == EXPR_CONSTANT | |
3434 | && init->ts.type == BT_CHARACTER | |
3435 | && init->ts.kind == 1) | |
3436 | gfc_set_constant_character_len ( | |
3437 | mpz_get_si (sym->ts.cl->length->value.integer), init); | |
3438 | ||
6de9cd9a DN |
3439 | sym->value = init; |
3440 | return MATCH_YES; | |
3441 | ||
3442 | cleanup: | |
3443 | gfc_free_expr (init); | |
3444 | return m; | |
3445 | } | |
3446 | ||
3447 | ||
3448 | /* Match a parameter statement, with the weird syntax that these have. */ | |
3449 | ||
3450 | match | |
3451 | gfc_match_parameter (void) | |
3452 | { | |
3453 | match m; | |
3454 | ||
3455 | if (gfc_match_char ('(') == MATCH_NO) | |
3456 | return MATCH_NO; | |
3457 | ||
3458 | for (;;) | |
3459 | { | |
3460 | m = do_parm (); | |
3461 | if (m != MATCH_YES) | |
3462 | break; | |
3463 | ||
3464 | if (gfc_match (" )%t") == MATCH_YES) | |
3465 | break; | |
3466 | ||
3467 | if (gfc_match_char (',') != MATCH_YES) | |
3468 | { | |
3469 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
3470 | m = MATCH_ERROR; | |
3471 | break; | |
3472 | } | |
3473 | } | |
3474 | ||
3475 | return m; | |
3476 | } | |
3477 | ||
3478 | ||
3479 | /* Save statements have a special syntax. */ | |
3480 | ||
3481 | match | |
3482 | gfc_match_save (void) | |
3483 | { | |
9056bd70 TS |
3484 | char n[GFC_MAX_SYMBOL_LEN+1]; |
3485 | gfc_common_head *c; | |
6de9cd9a DN |
3486 | gfc_symbol *sym; |
3487 | match m; | |
3488 | ||
3489 | if (gfc_match_eos () == MATCH_YES) | |
3490 | { | |
3491 | if (gfc_current_ns->seen_save) | |
3492 | { | |
09e87839 AL |
3493 | if (gfc_notify_std (GFC_STD_LEGACY, |
3494 | "Blanket SAVE statement at %C follows previous " | |
3495 | "SAVE statement") | |
3496 | == FAILURE) | |
3497 | return MATCH_ERROR; | |
6de9cd9a DN |
3498 | } |
3499 | ||
3500 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
3501 | return MATCH_YES; | |
3502 | } | |
3503 | ||
3504 | if (gfc_current_ns->save_all) | |
3505 | { | |
09e87839 AL |
3506 | if (gfc_notify_std (GFC_STD_LEGACY, |
3507 | "SAVE statement at %C follows blanket SAVE statement") | |
3508 | == FAILURE) | |
3509 | return MATCH_ERROR; | |
6de9cd9a DN |
3510 | } |
3511 | ||
3512 | gfc_match (" ::"); | |
3513 | ||
3514 | for (;;) | |
3515 | { | |
3516 | m = gfc_match_symbol (&sym, 0); | |
3517 | switch (m) | |
3518 | { | |
3519 | case MATCH_YES: | |
231b2fcc TS |
3520 | if (gfc_add_save (&sym->attr, sym->name, |
3521 | &gfc_current_locus) == FAILURE) | |
6de9cd9a DN |
3522 | return MATCH_ERROR; |
3523 | goto next_item; | |
3524 | ||
3525 | case MATCH_NO: | |
3526 | break; | |
3527 | ||
3528 | case MATCH_ERROR: | |
3529 | return MATCH_ERROR; | |
3530 | } | |
3531 | ||
9056bd70 | 3532 | m = gfc_match (" / %n /", &n); |
6de9cd9a DN |
3533 | if (m == MATCH_ERROR) |
3534 | return MATCH_ERROR; | |
3535 | if (m == MATCH_NO) | |
3536 | goto syntax; | |
3537 | ||
53814b8f | 3538 | c = gfc_get_common (n, 0); |
9056bd70 TS |
3539 | c->saved = 1; |
3540 | ||
6de9cd9a DN |
3541 | gfc_current_ns->seen_save = 1; |
3542 | ||
3543 | next_item: | |
3544 | if (gfc_match_eos () == MATCH_YES) | |
3545 | break; | |
3546 | if (gfc_match_char (',') != MATCH_YES) | |
3547 | goto syntax; | |
3548 | } | |
3549 | ||
3550 | return MATCH_YES; | |
3551 | ||
3552 | syntax: | |
3553 | gfc_error ("Syntax error in SAVE statement at %C"); | |
3554 | return MATCH_ERROR; | |
3555 | } | |
3556 | ||
3557 | ||
3558 | /* Match a module procedure statement. Note that we have to modify | |
3559 | symbols in the parent's namespace because the current one was there | |
49de9e73 | 3560 | to receive symbols that are in an interface's formal argument list. */ |
6de9cd9a DN |
3561 | |
3562 | match | |
3563 | gfc_match_modproc (void) | |
3564 | { | |
3565 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3566 | gfc_symbol *sym; | |
3567 | match m; | |
3568 | ||
3569 | if (gfc_state_stack->state != COMP_INTERFACE | |
3570 | || gfc_state_stack->previous == NULL | |
3571 | || current_interface.type == INTERFACE_NAMELESS) | |
3572 | { | |
3573 | gfc_error | |
3574 | ("MODULE PROCEDURE at %C must be in a generic module interface"); | |
3575 | return MATCH_ERROR; | |
3576 | } | |
3577 | ||
3578 | for (;;) | |
3579 | { | |
3580 | m = gfc_match_name (name); | |
3581 | if (m == MATCH_NO) | |
3582 | goto syntax; | |
3583 | if (m != MATCH_YES) | |
3584 | return MATCH_ERROR; | |
3585 | ||
3586 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
3587 | return MATCH_ERROR; | |
3588 | ||
3589 | if (sym->attr.proc != PROC_MODULE | |
231b2fcc TS |
3590 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
3591 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
3592 | return MATCH_ERROR; |
3593 | ||
3594 | if (gfc_add_interface (sym) == FAILURE) | |
3595 | return MATCH_ERROR; | |
3596 | ||
3597 | if (gfc_match_eos () == MATCH_YES) | |
3598 | break; | |
3599 | if (gfc_match_char (',') != MATCH_YES) | |
3600 | goto syntax; | |
3601 | } | |
3602 | ||
3603 | return MATCH_YES; | |
3604 | ||
3605 | syntax: | |
3606 | gfc_syntax_error (ST_MODULE_PROC); | |
3607 | return MATCH_ERROR; | |
3608 | } | |
3609 | ||
3610 | ||
3611 | /* Match the beginning of a derived type declaration. If a type name | |
3612 | was the result of a function, then it is possible to have a symbol | |
3613 | already to be known as a derived type yet have no components. */ | |
3614 | ||
3615 | match | |
3616 | gfc_match_derived_decl (void) | |
3617 | { | |
3618 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3619 | symbol_attribute attr; | |
3620 | gfc_symbol *sym; | |
3621 | match m; | |
3622 | ||
3623 | if (gfc_current_state () == COMP_DERIVED) | |
3624 | return MATCH_NO; | |
3625 | ||
3626 | gfc_clear_attr (&attr); | |
3627 | ||
3628 | loop: | |
3629 | if (gfc_match (" , private") == MATCH_YES) | |
3630 | { | |
3631 | if (gfc_find_state (COMP_MODULE) == FAILURE) | |
3632 | { | |
3633 | gfc_error | |
3634 | ("Derived type at %C can only be PRIVATE within a MODULE"); | |
3635 | return MATCH_ERROR; | |
3636 | } | |
3637 | ||
231b2fcc | 3638 | if (gfc_add_access (&attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
6de9cd9a DN |
3639 | return MATCH_ERROR; |
3640 | goto loop; | |
3641 | } | |
3642 | ||
3643 | if (gfc_match (" , public") == MATCH_YES) | |
3644 | { | |
3645 | if (gfc_find_state (COMP_MODULE) == FAILURE) | |
3646 | { | |
3647 | gfc_error ("Derived type at %C can only be PUBLIC within a MODULE"); | |
3648 | return MATCH_ERROR; | |
3649 | } | |
3650 | ||
231b2fcc | 3651 | if (gfc_add_access (&attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
6de9cd9a DN |
3652 | return MATCH_ERROR; |
3653 | goto loop; | |
3654 | } | |
3655 | ||
3656 | if (gfc_match (" ::") != MATCH_YES && attr.access != ACCESS_UNKNOWN) | |
3657 | { | |
3658 | gfc_error ("Expected :: in TYPE definition at %C"); | |
3659 | return MATCH_ERROR; | |
3660 | } | |
3661 | ||
3662 | m = gfc_match (" %n%t", name); | |
3663 | if (m != MATCH_YES) | |
3664 | return m; | |
3665 | ||
3666 | /* Make sure the name isn't the name of an intrinsic type. The | |
3667 | 'double precision' type doesn't get past the name matcher. */ | |
3668 | if (strcmp (name, "integer") == 0 | |
3669 | || strcmp (name, "real") == 0 | |
3670 | || strcmp (name, "character") == 0 | |
3671 | || strcmp (name, "logical") == 0 | |
3672 | || strcmp (name, "complex") == 0) | |
3673 | { | |
3674 | gfc_error | |
3675 | ("Type name '%s' at %C cannot be the same as an intrinsic type", | |
3676 | name); | |
3677 | return MATCH_ERROR; | |
3678 | } | |
3679 | ||
3680 | if (gfc_get_symbol (name, NULL, &sym)) | |
3681 | return MATCH_ERROR; | |
3682 | ||
3683 | if (sym->ts.type != BT_UNKNOWN) | |
3684 | { | |
3685 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
3686 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
3687 | return MATCH_ERROR; | |
3688 | } | |
3689 | ||
3690 | /* The symbol may already have the derived attribute without the | |
3691 | components. The ways this can happen is via a function | |
3692 | definition, an INTRINSIC statement or a subtype in another | |
3693 | derived type that is a pointer. The first part of the AND clause | |
f7b529fa | 3694 | is true if a the symbol is not the return value of a function. */ |
6de9cd9a | 3695 | if (sym->attr.flavor != FL_DERIVED |
231b2fcc | 3696 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
3697 | return MATCH_ERROR; |
3698 | ||
3699 | if (sym->components != NULL) | |
3700 | { | |
3701 | gfc_error | |
3702 | ("Derived type definition of '%s' at %C has already been defined", | |
3703 | sym->name); | |
3704 | return MATCH_ERROR; | |
3705 | } | |
3706 | ||
3707 | if (attr.access != ACCESS_UNKNOWN | |
231b2fcc | 3708 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
3709 | return MATCH_ERROR; |
3710 | ||
3711 | gfc_new_block = sym; | |
3712 | ||
3713 | return MATCH_YES; | |
3714 | } | |
83d890b9 AL |
3715 | |
3716 | ||
3717 | /* Cray Pointees can be declared as: | |
3718 | pointer (ipt, a (n,m,...,*)) | |
3719 | By default, this is treated as an AS_ASSUMED_SIZE array. We'll | |
3720 | cheat and set a constant bound of 1 for the last dimension, if this | |
3721 | is the case. Since there is no bounds-checking for Cray Pointees, | |
3722 | this will be okay. */ | |
3723 | ||
3724 | try | |
3725 | gfc_mod_pointee_as (gfc_array_spec *as) | |
3726 | { | |
3727 | as->cray_pointee = true; /* This will be useful to know later. */ | |
3728 | if (as->type == AS_ASSUMED_SIZE) | |
3729 | { | |
3730 | as->type = AS_EXPLICIT; | |
3731 | as->upper[as->rank - 1] = gfc_int_expr (1); | |
3732 | as->cp_was_assumed = true; | |
3733 | } | |
3734 | else if (as->type == AS_ASSUMED_SHAPE) | |
3735 | { | |
3736 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
3737 | return MATCH_ERROR; | |
3738 | } | |
3739 | return MATCH_YES; | |
3740 | } |