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6de9cd9a | 1 | /* Declaration statement matcher |
5cf54585 | 2 | Copyright (C) 2002, 2004, 2005, 2006 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 | ||
25d8f0a2 TS |
46 | /* Initializer of the previous enumerator. */ |
47 | ||
48 | static gfc_expr *last_initializer; | |
49 | ||
50 | /* History of all the enumerators is maintained, so that | |
51 | kind values of all the enumerators could be updated depending | |
52 | upon the maximum initialized value. */ | |
53 | ||
54 | typedef struct enumerator_history | |
55 | { | |
56 | gfc_symbol *sym; | |
57 | gfc_expr *initializer; | |
58 | struct enumerator_history *next; | |
59 | } | |
60 | enumerator_history; | |
61 | ||
62 | /* Header of enum history chain. */ | |
63 | ||
64 | static enumerator_history *enum_history = NULL; | |
65 | ||
66 | /* Pointer of enum history node containing largest initializer. */ | |
67 | ||
68 | static enumerator_history *max_enum = NULL; | |
69 | ||
6de9cd9a DN |
70 | /* gfc_new_block points to the symbol of a newly matched block. */ |
71 | ||
72 | gfc_symbol *gfc_new_block; | |
73 | ||
74 | ||
294fbfc8 TS |
75 | /********************* DATA statement subroutines *********************/ |
76 | ||
77 | /* Free a gfc_data_variable structure and everything beneath it. */ | |
78 | ||
79 | static void | |
80 | free_variable (gfc_data_variable * p) | |
81 | { | |
82 | gfc_data_variable *q; | |
83 | ||
84 | for (; p; p = q) | |
85 | { | |
86 | q = p->next; | |
87 | gfc_free_expr (p->expr); | |
88 | gfc_free_iterator (&p->iter, 0); | |
89 | free_variable (p->list); | |
90 | ||
91 | gfc_free (p); | |
92 | } | |
93 | } | |
94 | ||
95 | ||
96 | /* Free a gfc_data_value structure and everything beneath it. */ | |
97 | ||
98 | static void | |
99 | free_value (gfc_data_value * p) | |
100 | { | |
101 | gfc_data_value *q; | |
102 | ||
103 | for (; p; p = q) | |
104 | { | |
105 | q = p->next; | |
106 | gfc_free_expr (p->expr); | |
107 | gfc_free (p); | |
108 | } | |
109 | } | |
110 | ||
111 | ||
112 | /* Free a list of gfc_data structures. */ | |
113 | ||
114 | void | |
115 | gfc_free_data (gfc_data * p) | |
116 | { | |
117 | gfc_data *q; | |
118 | ||
119 | for (; p; p = q) | |
120 | { | |
121 | q = p->next; | |
122 | ||
123 | free_variable (p->var); | |
124 | free_value (p->value); | |
125 | ||
126 | gfc_free (p); | |
127 | } | |
128 | } | |
129 | ||
130 | ||
131 | static match var_element (gfc_data_variable *); | |
132 | ||
133 | /* Match a list of variables terminated by an iterator and a right | |
134 | parenthesis. */ | |
135 | ||
136 | static match | |
137 | var_list (gfc_data_variable * parent) | |
138 | { | |
139 | gfc_data_variable *tail, var; | |
140 | match m; | |
141 | ||
142 | m = var_element (&var); | |
143 | if (m == MATCH_ERROR) | |
144 | return MATCH_ERROR; | |
145 | if (m == MATCH_NO) | |
146 | goto syntax; | |
147 | ||
148 | tail = gfc_get_data_variable (); | |
149 | *tail = var; | |
150 | ||
151 | parent->list = tail; | |
152 | ||
153 | for (;;) | |
154 | { | |
155 | if (gfc_match_char (',') != MATCH_YES) | |
156 | goto syntax; | |
157 | ||
158 | m = gfc_match_iterator (&parent->iter, 1); | |
159 | if (m == MATCH_YES) | |
160 | break; | |
161 | if (m == MATCH_ERROR) | |
162 | return MATCH_ERROR; | |
163 | ||
164 | m = var_element (&var); | |
165 | if (m == MATCH_ERROR) | |
166 | return MATCH_ERROR; | |
167 | if (m == MATCH_NO) | |
168 | goto syntax; | |
169 | ||
170 | tail->next = gfc_get_data_variable (); | |
171 | tail = tail->next; | |
172 | ||
173 | *tail = var; | |
174 | } | |
175 | ||
176 | if (gfc_match_char (')') != MATCH_YES) | |
177 | goto syntax; | |
178 | return MATCH_YES; | |
179 | ||
180 | syntax: | |
181 | gfc_syntax_error (ST_DATA); | |
182 | return MATCH_ERROR; | |
183 | } | |
184 | ||
185 | ||
186 | /* Match a single element in a data variable list, which can be a | |
187 | variable-iterator list. */ | |
188 | ||
189 | static match | |
190 | var_element (gfc_data_variable * new) | |
191 | { | |
192 | match m; | |
193 | gfc_symbol *sym; | |
194 | ||
195 | memset (new, 0, sizeof (gfc_data_variable)); | |
196 | ||
197 | if (gfc_match_char ('(') == MATCH_YES) | |
198 | return var_list (new); | |
199 | ||
200 | m = gfc_match_variable (&new->expr, 0); | |
201 | if (m != MATCH_YES) | |
202 | return m; | |
203 | ||
204 | sym = new->expr->symtree->n.sym; | |
205 | ||
4075a94e | 206 | if (!sym->attr.function && gfc_current_ns->parent && gfc_current_ns->parent == sym->ns) |
294fbfc8 | 207 | { |
4075a94e PT |
208 | gfc_error ("Host associated variable '%s' may not be in the DATA " |
209 | "statement at %C.", sym->name); | |
294fbfc8 TS |
210 | return MATCH_ERROR; |
211 | } | |
212 | ||
4075a94e PT |
213 | if (gfc_current_state () != COMP_BLOCK_DATA |
214 | && sym->attr.in_common | |
215 | && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of " | |
216 | "common block variable '%s' in DATA statement at %C", | |
217 | sym->name) == FAILURE) | |
218 | return MATCH_ERROR; | |
294fbfc8 | 219 | |
231b2fcc | 220 | if (gfc_add_data (&sym->attr, sym->name, &new->expr->where) == FAILURE) |
294fbfc8 TS |
221 | return MATCH_ERROR; |
222 | ||
223 | return MATCH_YES; | |
224 | } | |
225 | ||
226 | ||
227 | /* Match the top-level list of data variables. */ | |
228 | ||
229 | static match | |
230 | top_var_list (gfc_data * d) | |
231 | { | |
232 | gfc_data_variable var, *tail, *new; | |
233 | match m; | |
234 | ||
235 | tail = NULL; | |
236 | ||
237 | for (;;) | |
238 | { | |
239 | m = var_element (&var); | |
240 | if (m == MATCH_NO) | |
241 | goto syntax; | |
242 | if (m == MATCH_ERROR) | |
243 | return MATCH_ERROR; | |
244 | ||
245 | new = gfc_get_data_variable (); | |
246 | *new = var; | |
247 | ||
248 | if (tail == NULL) | |
249 | d->var = new; | |
250 | else | |
251 | tail->next = new; | |
252 | ||
253 | tail = new; | |
254 | ||
255 | if (gfc_match_char ('/') == MATCH_YES) | |
256 | break; | |
257 | if (gfc_match_char (',') != MATCH_YES) | |
258 | goto syntax; | |
259 | } | |
260 | ||
261 | return MATCH_YES; | |
262 | ||
263 | syntax: | |
264 | gfc_syntax_error (ST_DATA); | |
265 | return MATCH_ERROR; | |
266 | } | |
267 | ||
268 | ||
269 | static match | |
270 | match_data_constant (gfc_expr ** result) | |
271 | { | |
272 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
273 | gfc_symbol *sym; | |
274 | gfc_expr *expr; | |
275 | match m; | |
276 | ||
277 | m = gfc_match_literal_constant (&expr, 1); | |
278 | if (m == MATCH_YES) | |
279 | { | |
280 | *result = expr; | |
281 | return MATCH_YES; | |
282 | } | |
283 | ||
284 | if (m == MATCH_ERROR) | |
285 | return MATCH_ERROR; | |
286 | ||
287 | m = gfc_match_null (result); | |
288 | if (m != MATCH_NO) | |
289 | return m; | |
290 | ||
291 | m = gfc_match_name (name); | |
292 | if (m != MATCH_YES) | |
293 | return m; | |
294 | ||
295 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
296 | return MATCH_ERROR; | |
297 | ||
298 | if (sym == NULL | |
299 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
300 | { | |
301 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
302 | name); | |
303 | return MATCH_ERROR; | |
304 | } | |
305 | else if (sym->attr.flavor == FL_DERIVED) | |
306 | return gfc_match_structure_constructor (sym, result); | |
307 | ||
308 | *result = gfc_copy_expr (sym->value); | |
309 | return MATCH_YES; | |
310 | } | |
311 | ||
312 | ||
313 | /* Match a list of values in a DATA statement. The leading '/' has | |
314 | already been seen at this point. */ | |
315 | ||
316 | static match | |
317 | top_val_list (gfc_data * data) | |
318 | { | |
319 | gfc_data_value *new, *tail; | |
320 | gfc_expr *expr; | |
321 | const char *msg; | |
322 | match m; | |
323 | ||
324 | tail = NULL; | |
325 | ||
326 | for (;;) | |
327 | { | |
328 | m = match_data_constant (&expr); | |
329 | if (m == MATCH_NO) | |
330 | goto syntax; | |
331 | if (m == MATCH_ERROR) | |
332 | return MATCH_ERROR; | |
333 | ||
334 | new = gfc_get_data_value (); | |
335 | ||
336 | if (tail == NULL) | |
337 | data->value = new; | |
338 | else | |
339 | tail->next = new; | |
340 | ||
341 | tail = new; | |
342 | ||
343 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
344 | { | |
345 | tail->expr = expr; | |
346 | tail->repeat = 1; | |
347 | } | |
348 | else | |
349 | { | |
350 | signed int tmp; | |
351 | msg = gfc_extract_int (expr, &tmp); | |
352 | gfc_free_expr (expr); | |
353 | if (msg != NULL) | |
354 | { | |
355 | gfc_error (msg); | |
356 | return MATCH_ERROR; | |
357 | } | |
358 | tail->repeat = tmp; | |
359 | ||
360 | m = match_data_constant (&tail->expr); | |
361 | if (m == MATCH_NO) | |
362 | goto syntax; | |
363 | if (m == MATCH_ERROR) | |
364 | return MATCH_ERROR; | |
365 | } | |
366 | ||
367 | if (gfc_match_char ('/') == MATCH_YES) | |
368 | break; | |
369 | if (gfc_match_char (',') == MATCH_NO) | |
370 | goto syntax; | |
371 | } | |
372 | ||
373 | return MATCH_YES; | |
374 | ||
375 | syntax: | |
376 | gfc_syntax_error (ST_DATA); | |
377 | return MATCH_ERROR; | |
378 | } | |
379 | ||
380 | ||
381 | /* Matches an old style initialization. */ | |
382 | ||
383 | static match | |
384 | match_old_style_init (const char *name) | |
385 | { | |
386 | match m; | |
387 | gfc_symtree *st; | |
ed0e3607 | 388 | gfc_symbol *sym; |
294fbfc8 TS |
389 | gfc_data *newdata; |
390 | ||
391 | /* Set up data structure to hold initializers. */ | |
392 | gfc_find_sym_tree (name, NULL, 0, &st); | |
ed0e3607 AL |
393 | sym = st->n.sym; |
394 | ||
294fbfc8 TS |
395 | newdata = gfc_get_data (); |
396 | newdata->var = gfc_get_data_variable (); | |
397 | newdata->var->expr = gfc_get_variable_expr (st); | |
8c5c0b80 | 398 | newdata->where = gfc_current_locus; |
294fbfc8 TS |
399 | |
400 | /* Match initial value list. This also eats the terminal | |
401 | '/'. */ | |
402 | m = top_val_list (newdata); | |
403 | if (m != MATCH_YES) | |
404 | { | |
405 | gfc_free (newdata); | |
406 | return m; | |
407 | } | |
408 | ||
409 | if (gfc_pure (NULL)) | |
410 | { | |
411 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
412 | gfc_free (newdata); | |
413 | return MATCH_ERROR; | |
414 | } | |
415 | ||
ed0e3607 AL |
416 | /* Mark the variable as having appeared in a data statement. */ |
417 | if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) | |
418 | { | |
419 | gfc_free (newdata); | |
420 | return MATCH_ERROR; | |
421 | } | |
422 | ||
294fbfc8 TS |
423 | /* Chain in namespace list of DATA initializers. */ |
424 | newdata->next = gfc_current_ns->data; | |
425 | gfc_current_ns->data = newdata; | |
426 | ||
427 | return m; | |
428 | } | |
429 | ||
430 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, | |
13795658 | 431 | we are matching a DATA statement and are therefore issuing an error |
294fbfc8 | 432 | if we encounter something unexpected, if not, we're trying to match |
69de3b83 | 433 | an old-style initialization expression of the form INTEGER I /2/. */ |
294fbfc8 TS |
434 | |
435 | match | |
436 | gfc_match_data (void) | |
437 | { | |
438 | gfc_data *new; | |
439 | match m; | |
440 | ||
441 | for (;;) | |
442 | { | |
443 | new = gfc_get_data (); | |
444 | new->where = gfc_current_locus; | |
445 | ||
446 | m = top_var_list (new); | |
447 | if (m != MATCH_YES) | |
448 | goto cleanup; | |
449 | ||
450 | m = top_val_list (new); | |
451 | if (m != MATCH_YES) | |
452 | goto cleanup; | |
453 | ||
454 | new->next = gfc_current_ns->data; | |
455 | gfc_current_ns->data = new; | |
456 | ||
457 | if (gfc_match_eos () == MATCH_YES) | |
458 | break; | |
459 | ||
460 | gfc_match_char (','); /* Optional comma */ | |
461 | } | |
462 | ||
463 | if (gfc_pure (NULL)) | |
464 | { | |
465 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
466 | return MATCH_ERROR; | |
467 | } | |
468 | ||
469 | return MATCH_YES; | |
470 | ||
471 | cleanup: | |
472 | gfc_free_data (new); | |
473 | return MATCH_ERROR; | |
474 | } | |
475 | ||
476 | ||
477 | /************************ Declaration statements *********************/ | |
478 | ||
6de9cd9a DN |
479 | /* Match an intent specification. Since this can only happen after an |
480 | INTENT word, a legal intent-spec must follow. */ | |
481 | ||
482 | static sym_intent | |
483 | match_intent_spec (void) | |
484 | { | |
485 | ||
486 | if (gfc_match (" ( in out )") == MATCH_YES) | |
487 | return INTENT_INOUT; | |
488 | if (gfc_match (" ( in )") == MATCH_YES) | |
489 | return INTENT_IN; | |
490 | if (gfc_match (" ( out )") == MATCH_YES) | |
491 | return INTENT_OUT; | |
492 | ||
493 | gfc_error ("Bad INTENT specification at %C"); | |
494 | return INTENT_UNKNOWN; | |
495 | } | |
496 | ||
497 | ||
498 | /* Matches a character length specification, which is either a | |
499 | specification expression or a '*'. */ | |
500 | ||
501 | static match | |
502 | char_len_param_value (gfc_expr ** expr) | |
503 | { | |
504 | ||
505 | if (gfc_match_char ('*') == MATCH_YES) | |
506 | { | |
507 | *expr = NULL; | |
508 | return MATCH_YES; | |
509 | } | |
510 | ||
511 | return gfc_match_expr (expr); | |
512 | } | |
513 | ||
514 | ||
515 | /* A character length is a '*' followed by a literal integer or a | |
516 | char_len_param_value in parenthesis. */ | |
517 | ||
518 | static match | |
519 | match_char_length (gfc_expr ** expr) | |
520 | { | |
5cf54585 | 521 | int length; |
6de9cd9a DN |
522 | match m; |
523 | ||
524 | m = gfc_match_char ('*'); | |
525 | if (m != MATCH_YES) | |
526 | return m; | |
527 | ||
5cf54585 | 528 | m = gfc_match_small_literal_int (&length, NULL); |
6de9cd9a DN |
529 | if (m == MATCH_ERROR) |
530 | return m; | |
531 | ||
532 | if (m == MATCH_YES) | |
533 | { | |
534 | *expr = gfc_int_expr (length); | |
535 | return m; | |
536 | } | |
537 | ||
538 | if (gfc_match_char ('(') == MATCH_NO) | |
539 | goto syntax; | |
540 | ||
541 | m = char_len_param_value (expr); | |
542 | if (m == MATCH_ERROR) | |
543 | return m; | |
544 | if (m == MATCH_NO) | |
545 | goto syntax; | |
546 | ||
547 | if (gfc_match_char (')') == MATCH_NO) | |
548 | { | |
549 | gfc_free_expr (*expr); | |
550 | *expr = NULL; | |
551 | goto syntax; | |
552 | } | |
553 | ||
554 | return MATCH_YES; | |
555 | ||
556 | syntax: | |
557 | gfc_error ("Syntax error in character length specification at %C"); | |
558 | return MATCH_ERROR; | |
559 | } | |
560 | ||
561 | ||
9e35b386 EE |
562 | /* Special subroutine for finding a symbol. Check if the name is found |
563 | in the current name space. If not, and we're compiling a function or | |
564 | subroutine and the parent compilation unit is an interface, then check | |
565 | to see if the name we've been given is the name of the interface | |
566 | (located in another namespace). */ | |
6de9cd9a DN |
567 | |
568 | static int | |
569 | find_special (const char *name, gfc_symbol ** result) | |
570 | { | |
571 | gfc_state_data *s; | |
9e35b386 | 572 | int i; |
6de9cd9a | 573 | |
9e35b386 EE |
574 | i = gfc_get_symbol (name, NULL, result); |
575 | if (i==0) | |
576 | goto end; | |
577 | ||
6de9cd9a DN |
578 | if (gfc_current_state () != COMP_SUBROUTINE |
579 | && gfc_current_state () != COMP_FUNCTION) | |
9e35b386 | 580 | goto end; |
6de9cd9a DN |
581 | |
582 | s = gfc_state_stack->previous; | |
583 | if (s == NULL) | |
9e35b386 | 584 | goto end; |
6de9cd9a DN |
585 | |
586 | if (s->state != COMP_INTERFACE) | |
9e35b386 | 587 | goto end; |
6de9cd9a | 588 | if (s->sym == NULL) |
9e35b386 | 589 | goto end; /* Nameless interface */ |
6de9cd9a DN |
590 | |
591 | if (strcmp (name, s->sym->name) == 0) | |
592 | { | |
593 | *result = s->sym; | |
594 | return 0; | |
595 | } | |
596 | ||
9e35b386 EE |
597 | end: |
598 | return i; | |
6de9cd9a DN |
599 | } |
600 | ||
601 | ||
602 | /* Special subroutine for getting a symbol node associated with a | |
603 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
604 | symbol is created in the parent using with symtree node in the | |
605 | child unit pointing to the symbol. If the current namespace has no | |
606 | parent, then the symbol is just created in the current unit. */ | |
607 | ||
608 | static int | |
1a492601 PT |
609 | get_proc_name (const char *name, gfc_symbol ** result, |
610 | bool module_fcn_entry) | |
6de9cd9a DN |
611 | { |
612 | gfc_symtree *st; | |
613 | gfc_symbol *sym; | |
614 | int rc; | |
615 | ||
1a492601 PT |
616 | /* Module functions have to be left in their own namespace because |
617 | they have potentially (almost certainly!) already been referenced. | |
618 | In this sense, they are rather like external functions. This is | |
619 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
620 | space is set to point to the master function, so that the fake | |
621 | result mechanism can work. */ | |
622 | if (module_fcn_entry) | |
68ea355b PT |
623 | rc = gfc_get_symbol (name, NULL, result); |
624 | else | |
625 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
6de9cd9a | 626 | |
68ea355b | 627 | sym = *result; |
6de9cd9a | 628 | |
68ea355b PT |
629 | if (sym && !sym->new && gfc_current_state () != COMP_INTERFACE) |
630 | { | |
cda7004b PT |
631 | /* Trap another encompassed procedure with the same name. All |
632 | these conditions are necessary to avoid picking up an entry | |
633 | whose name clashes with that of the encompassing procedure; | |
634 | this is handled using gsymbols to register unique,globally | |
635 | accessible names. */ | |
68ea355b PT |
636 | if (sym->attr.flavor != 0 |
637 | && sym->attr.proc != 0 | |
982186b1 PT |
638 | && (sym->attr.subroutine || sym->attr.function) |
639 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
68ea355b PT |
640 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
641 | name, &sym->declared_at); | |
642 | ||
643 | /* Trap declarations of attributes in encompassing scope. The | |
644 | signature for this is that ts.kind is set. Legitimate | |
645 | references only set ts.type. */ | |
646 | if (sym->ts.kind != 0 | |
982186b1 | 647 | && !sym->attr.implicit_type |
68ea355b PT |
648 | && sym->attr.proc == 0 |
649 | && gfc_current_ns->parent != NULL | |
1a492601 PT |
650 | && sym->attr.access == 0 |
651 | && !module_fcn_entry) | |
68ea355b PT |
652 | gfc_error_now ("Procedure '%s' at %C has an explicit interface" |
653 | " and must not have attributes declared at %L", | |
654 | name, &sym->declared_at); | |
655 | } | |
656 | ||
657 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
658 | return rc; | |
6de9cd9a | 659 | |
1a492601 PT |
660 | /* Module function entries will already have a symtree in |
661 | the current namespace but will need one at module level. */ | |
662 | if (module_fcn_entry) | |
663 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
664 | else | |
665 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
6de9cd9a | 666 | |
6de9cd9a DN |
667 | st->n.sym = sym; |
668 | sym->refs++; | |
669 | ||
670 | /* See if the procedure should be a module procedure */ | |
671 | ||
1a492601 PT |
672 | if (((sym->ns->proc_name != NULL |
673 | && sym->ns->proc_name->attr.flavor == FL_MODULE | |
674 | && sym->attr.proc != PROC_MODULE) || module_fcn_entry) | |
675 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
676 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
677 | rc = 2; |
678 | ||
679 | return rc; | |
680 | } | |
681 | ||
682 | ||
683 | /* Function called by variable_decl() that adds a name to the symbol | |
684 | table. */ | |
685 | ||
686 | static try | |
687 | build_sym (const char *name, gfc_charlen * cl, | |
688 | gfc_array_spec ** as, locus * var_locus) | |
689 | { | |
690 | symbol_attribute attr; | |
691 | gfc_symbol *sym; | |
692 | ||
9e35b386 EE |
693 | /* if (find_special (name, &sym)) */ |
694 | if (gfc_get_symbol (name, NULL, &sym)) | |
6de9cd9a DN |
695 | return FAILURE; |
696 | ||
697 | /* Start updating the symbol table. Add basic type attribute | |
698 | if present. */ | |
699 | if (current_ts.type != BT_UNKNOWN | |
700 | &&(sym->attr.implicit_type == 0 | |
701 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
702 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) | |
703 | return FAILURE; | |
704 | ||
705 | if (sym->ts.type == BT_CHARACTER) | |
706 | sym->ts.cl = cl; | |
707 | ||
708 | /* Add dimension attribute if present. */ | |
709 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
710 | return FAILURE; | |
711 | *as = NULL; | |
712 | ||
713 | /* Add attribute to symbol. The copy is so that we can reset the | |
714 | dimension attribute. */ | |
715 | attr = current_attr; | |
716 | attr.dimension = 0; | |
717 | ||
718 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
719 | return FAILURE; | |
720 | ||
721 | return SUCCESS; | |
722 | } | |
723 | ||
df7cc9b5 FW |
724 | /* Set character constant to the given length. The constant will be padded or |
725 | truncated. */ | |
726 | ||
727 | void | |
728 | gfc_set_constant_character_len (int len, gfc_expr * expr) | |
729 | { | |
730 | char * s; | |
731 | int slen; | |
732 | ||
733 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
734 | gcc_assert (expr->ts.type == BT_CHARACTER && expr->ts.kind == 1); | |
735 | ||
736 | slen = expr->value.character.length; | |
737 | if (len != slen) | |
738 | { | |
739 | s = gfc_getmem (len); | |
740 | memcpy (s, expr->value.character.string, MIN (len, slen)); | |
741 | if (len > slen) | |
742 | memset (&s[slen], ' ', len - slen); | |
743 | gfc_free (expr->value.character.string); | |
744 | expr->value.character.string = s; | |
745 | expr->value.character.length = len; | |
746 | } | |
747 | } | |
6de9cd9a | 748 | |
25d8f0a2 | 749 | |
831d7813 | 750 | /* Function to create and update the enumerator history |
25d8f0a2 TS |
751 | using the information passed as arguments. |
752 | Pointer "max_enum" is also updated, to point to | |
753 | enum history node containing largest initializer. | |
754 | ||
755 | SYM points to the symbol node of enumerator. | |
756 | INIT points to its enumerator value. */ | |
757 | ||
758 | static void | |
759 | create_enum_history(gfc_symbol *sym, gfc_expr *init) | |
760 | { | |
761 | enumerator_history *new_enum_history; | |
762 | gcc_assert (sym != NULL && init != NULL); | |
763 | ||
764 | new_enum_history = gfc_getmem (sizeof (enumerator_history)); | |
765 | ||
766 | new_enum_history->sym = sym; | |
767 | new_enum_history->initializer = init; | |
768 | new_enum_history->next = NULL; | |
769 | ||
770 | if (enum_history == NULL) | |
771 | { | |
772 | enum_history = new_enum_history; | |
773 | max_enum = enum_history; | |
774 | } | |
775 | else | |
776 | { | |
777 | new_enum_history->next = enum_history; | |
778 | enum_history = new_enum_history; | |
779 | ||
780 | if (mpz_cmp (max_enum->initializer->value.integer, | |
781 | new_enum_history->initializer->value.integer) < 0) | |
782 | max_enum = new_enum_history; | |
783 | } | |
784 | } | |
785 | ||
786 | ||
787 | /* Function to free enum kind history. */ | |
788 | ||
789 | void | |
790 | gfc_free_enum_history(void) | |
791 | { | |
792 | enumerator_history *current = enum_history; | |
793 | enumerator_history *next; | |
794 | ||
795 | while (current != NULL) | |
796 | { | |
797 | next = current->next; | |
798 | gfc_free (current); | |
799 | current = next; | |
800 | } | |
801 | max_enum = NULL; | |
802 | enum_history = NULL; | |
803 | } | |
804 | ||
805 | ||
6de9cd9a DN |
806 | /* Function called by variable_decl() that adds an initialization |
807 | expression to a symbol. */ | |
808 | ||
809 | static try | |
810 | add_init_expr_to_sym (const char *name, gfc_expr ** initp, | |
811 | locus * var_locus) | |
812 | { | |
813 | symbol_attribute attr; | |
814 | gfc_symbol *sym; | |
815 | gfc_expr *init; | |
816 | ||
817 | init = *initp; | |
818 | if (find_special (name, &sym)) | |
819 | return FAILURE; | |
820 | ||
821 | attr = sym->attr; | |
822 | ||
823 | /* If this symbol is confirming an implicit parameter type, | |
824 | then an initialization expression is not allowed. */ | |
825 | if (attr.flavor == FL_PARAMETER | |
826 | && sym->value != NULL | |
827 | && *initp != NULL) | |
828 | { | |
829 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
830 | sym->name); | |
831 | return FAILURE; | |
832 | } | |
833 | ||
c8e20bd0 TS |
834 | if (attr.in_common |
835 | && !attr.data | |
836 | && *initp != NULL) | |
837 | { | |
838 | gfc_error ("Initializer not allowed for COMMON variable '%s' at %C", | |
839 | sym->name); | |
840 | return FAILURE; | |
841 | } | |
842 | ||
6de9cd9a DN |
843 | if (init == NULL) |
844 | { | |
845 | /* An initializer is required for PARAMETER declarations. */ | |
846 | if (attr.flavor == FL_PARAMETER) | |
847 | { | |
848 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
849 | return FAILURE; | |
850 | } | |
851 | } | |
852 | else | |
853 | { | |
854 | /* If a variable appears in a DATA block, it cannot have an | |
1de8a836 | 855 | initializer. */ |
6de9cd9a DN |
856 | if (sym->attr.data) |
857 | { | |
858 | gfc_error | |
859 | ("Variable '%s' at %C with an initializer already appears " | |
860 | "in a DATA statement", sym->name); | |
861 | return FAILURE; | |
862 | } | |
863 | ||
75d17889 TS |
864 | /* Check if the assignment can happen. This has to be put off |
865 | until later for a derived type variable. */ | |
6de9cd9a DN |
866 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
867 | && gfc_check_assign_symbol (sym, init) == FAILURE) | |
868 | return FAILURE; | |
869 | ||
df7cc9b5 FW |
870 | if (sym->ts.type == BT_CHARACTER && sym->ts.cl) |
871 | { | |
872 | /* Update symbol character length according initializer. */ | |
873 | if (sym->ts.cl->length == NULL) | |
874 | { | |
4213f93b PT |
875 | /* If there are multiple CHARACTER variables declared on |
876 | the same line, we don't want them to share the same | |
877 | length. */ | |
878 | sym->ts.cl = gfc_get_charlen (); | |
879 | sym->ts.cl->next = gfc_current_ns->cl_list; | |
880 | gfc_current_ns->cl_list = sym->ts.cl; | |
96f4873b PT |
881 | |
882 | if (sym->attr.flavor == FL_PARAMETER | |
883 | && init->expr_type == EXPR_ARRAY) | |
884 | sym->ts.cl->length = gfc_copy_expr (init->ts.cl->length); | |
df7cc9b5 FW |
885 | } |
886 | /* Update initializer character length according symbol. */ | |
887 | else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT) | |
888 | { | |
889 | int len = mpz_get_si (sym->ts.cl->length->value.integer); | |
890 | gfc_constructor * p; | |
891 | ||
892 | if (init->expr_type == EXPR_CONSTANT) | |
893 | gfc_set_constant_character_len (len, init); | |
894 | else if (init->expr_type == EXPR_ARRAY) | |
895 | { | |
896 | gfc_free_expr (init->ts.cl->length); | |
897 | init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length); | |
898 | for (p = init->value.constructor; p; p = p->next) | |
899 | gfc_set_constant_character_len (len, p->expr); | |
900 | } | |
901 | } | |
902 | } | |
903 | ||
6de9cd9a DN |
904 | /* Add initializer. Make sure we keep the ranks sane. */ |
905 | if (sym->attr.dimension && init->rank == 0) | |
906 | init->rank = sym->as->rank; | |
907 | ||
908 | sym->value = init; | |
909 | *initp = NULL; | |
910 | } | |
911 | ||
25d8f0a2 TS |
912 | /* Maintain enumerator history. */ |
913 | if (gfc_current_state () == COMP_ENUM) | |
914 | create_enum_history (sym, init); | |
915 | ||
6de9cd9a DN |
916 | return SUCCESS; |
917 | } | |
918 | ||
919 | ||
920 | /* Function called by variable_decl() that adds a name to a structure | |
921 | being built. */ | |
922 | ||
923 | static try | |
924 | build_struct (const char *name, gfc_charlen * cl, gfc_expr ** init, | |
925 | gfc_array_spec ** as) | |
926 | { | |
927 | gfc_component *c; | |
928 | ||
929 | /* If the current symbol is of the same derived type that we're | |
930 | constructing, it must have the pointer attribute. */ | |
931 | if (current_ts.type == BT_DERIVED | |
932 | && current_ts.derived == gfc_current_block () | |
933 | && current_attr.pointer == 0) | |
934 | { | |
935 | gfc_error ("Component at %C must have the POINTER attribute"); | |
936 | return FAILURE; | |
937 | } | |
938 | ||
939 | if (gfc_current_block ()->attr.pointer | |
940 | && (*as)->rank != 0) | |
941 | { | |
942 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
943 | { | |
944 | gfc_error ("Array component of structure at %C must have explicit " | |
945 | "or deferred shape"); | |
946 | return FAILURE; | |
947 | } | |
948 | } | |
949 | ||
950 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
951 | return FAILURE; | |
952 | ||
953 | c->ts = current_ts; | |
954 | c->ts.cl = cl; | |
955 | gfc_set_component_attr (c, ¤t_attr); | |
956 | ||
957 | c->initializer = *init; | |
958 | *init = NULL; | |
959 | ||
960 | c->as = *as; | |
961 | if (c->as != NULL) | |
962 | c->dimension = 1; | |
963 | *as = NULL; | |
964 | ||
965 | /* Check array components. */ | |
966 | if (!c->dimension) | |
5046aff5 PT |
967 | { |
968 | if (c->allocatable) | |
969 | { | |
970 | gfc_error ("Allocatable component at %C must be an array"); | |
971 | return FAILURE; | |
972 | } | |
973 | else | |
974 | return SUCCESS; | |
975 | } | |
6de9cd9a DN |
976 | |
977 | if (c->pointer) | |
978 | { | |
979 | if (c->as->type != AS_DEFERRED) | |
980 | { | |
5046aff5 PT |
981 | gfc_error ("Pointer array component of structure at %C must have a " |
982 | "deferred shape"); | |
983 | return FAILURE; | |
984 | } | |
985 | } | |
986 | else if (c->allocatable) | |
987 | { | |
988 | if (c->as->type != AS_DEFERRED) | |
989 | { | |
990 | gfc_error ("Allocatable component of structure at %C must have a " | |
991 | "deferred shape"); | |
6de9cd9a DN |
992 | return FAILURE; |
993 | } | |
994 | } | |
995 | else | |
996 | { | |
997 | if (c->as->type != AS_EXPLICIT) | |
998 | { | |
999 | gfc_error | |
1000 | ("Array component of structure at %C must have an explicit " | |
1001 | "shape"); | |
1002 | return FAILURE; | |
1003 | } | |
1004 | } | |
1005 | ||
1006 | return SUCCESS; | |
1007 | } | |
1008 | ||
1009 | ||
1010 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1011 | ||
1012 | match | |
1013 | gfc_match_null (gfc_expr ** result) | |
1014 | { | |
1015 | gfc_symbol *sym; | |
1016 | gfc_expr *e; | |
1017 | match m; | |
1018 | ||
1019 | m = gfc_match (" null ( )"); | |
1020 | if (m != MATCH_YES) | |
1021 | return m; | |
1022 | ||
1023 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1024 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1025 | { | |
1026 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1027 | return MATCH_ERROR; | |
1028 | } | |
1029 | ||
1030 | gfc_intrinsic_symbol (sym); | |
1031 | ||
1032 | if (sym->attr.proc != PROC_INTRINSIC | |
231b2fcc TS |
1033 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1034 | sym->name, NULL) == FAILURE | |
1035 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
6de9cd9a DN |
1036 | return MATCH_ERROR; |
1037 | ||
1038 | e = gfc_get_expr (); | |
63645982 | 1039 | e->where = gfc_current_locus; |
6de9cd9a DN |
1040 | e->expr_type = EXPR_NULL; |
1041 | e->ts.type = BT_UNKNOWN; | |
1042 | ||
1043 | *result = e; | |
1044 | ||
1045 | return MATCH_YES; | |
1046 | } | |
1047 | ||
1048 | ||
6de9cd9a DN |
1049 | /* Match a variable name with an optional initializer. When this |
1050 | subroutine is called, a variable is expected to be parsed next. | |
1051 | Depending on what is happening at the moment, updates either the | |
1052 | symbol table or the current interface. */ | |
1053 | ||
1054 | static match | |
949d5b72 | 1055 | variable_decl (int elem) |
6de9cd9a DN |
1056 | { |
1057 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1058 | gfc_expr *initializer, *char_len; | |
1059 | gfc_array_spec *as; | |
83d890b9 | 1060 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
6de9cd9a DN |
1061 | gfc_charlen *cl; |
1062 | locus var_locus; | |
1063 | match m; | |
1064 | try t; | |
83d890b9 | 1065 | gfc_symbol *sym; |
25d8f0a2 | 1066 | locus old_locus; |
6de9cd9a DN |
1067 | |
1068 | initializer = NULL; | |
1069 | as = NULL; | |
83d890b9 | 1070 | cp_as = NULL; |
25d8f0a2 | 1071 | old_locus = gfc_current_locus; |
6de9cd9a DN |
1072 | |
1073 | /* When we get here, we've just matched a list of attributes and | |
1074 | maybe a type and a double colon. The next thing we expect to see | |
1075 | is the name of the symbol. */ | |
1076 | m = gfc_match_name (name); | |
1077 | if (m != MATCH_YES) | |
1078 | goto cleanup; | |
1079 | ||
63645982 | 1080 | var_locus = gfc_current_locus; |
6de9cd9a DN |
1081 | |
1082 | /* Now we could see the optional array spec. or character length. */ | |
1083 | m = gfc_match_array_spec (&as); | |
83d890b9 AL |
1084 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1085 | cp_as = gfc_copy_array_spec (as); | |
1086 | else if (m == MATCH_ERROR) | |
6de9cd9a | 1087 | goto cleanup; |
25d8f0a2 | 1088 | |
6de9cd9a DN |
1089 | if (m == MATCH_NO) |
1090 | as = gfc_copy_array_spec (current_as); | |
25d8f0a2 TS |
1091 | else if (gfc_current_state () == COMP_ENUM) |
1092 | { | |
1093 | gfc_error ("Enumerator cannot be array at %C"); | |
1094 | gfc_free_enum_history (); | |
1095 | m = MATCH_ERROR; | |
1096 | goto cleanup; | |
1097 | } | |
1098 | ||
6de9cd9a DN |
1099 | |
1100 | char_len = NULL; | |
1101 | cl = NULL; | |
1102 | ||
1103 | if (current_ts.type == BT_CHARACTER) | |
1104 | { | |
1105 | switch (match_char_length (&char_len)) | |
1106 | { | |
1107 | case MATCH_YES: | |
1108 | cl = gfc_get_charlen (); | |
1109 | cl->next = gfc_current_ns->cl_list; | |
1110 | gfc_current_ns->cl_list = cl; | |
1111 | ||
1112 | cl->length = char_len; | |
1113 | break; | |
1114 | ||
949d5b72 PT |
1115 | /* Non-constant lengths need to be copied after the first |
1116 | element. */ | |
6de9cd9a | 1117 | case MATCH_NO: |
949d5b72 PT |
1118 | if (elem > 1 && current_ts.cl->length |
1119 | && current_ts.cl->length->expr_type != EXPR_CONSTANT) | |
1120 | { | |
1121 | cl = gfc_get_charlen (); | |
1122 | cl->next = gfc_current_ns->cl_list; | |
1123 | gfc_current_ns->cl_list = cl; | |
1124 | cl->length = gfc_copy_expr (current_ts.cl->length); | |
1125 | } | |
1126 | else | |
1127 | cl = current_ts.cl; | |
1128 | ||
6de9cd9a DN |
1129 | break; |
1130 | ||
1131 | case MATCH_ERROR: | |
1132 | goto cleanup; | |
1133 | } | |
1134 | } | |
1135 | ||
83d890b9 AL |
1136 | /* If this symbol has already shown up in a Cray Pointer declaration, |
1137 | then we want to set the type & bail out. */ | |
1138 | if (gfc_option.flag_cray_pointer) | |
1139 | { | |
1140 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1141 | if (sym != NULL && sym->attr.cray_pointee) | |
1142 | { | |
1143 | sym->ts.type = current_ts.type; | |
1144 | sym->ts.kind = current_ts.kind; | |
1145 | sym->ts.cl = cl; | |
1146 | sym->ts.derived = current_ts.derived; | |
1147 | m = MATCH_YES; | |
1148 | ||
1149 | /* Check to see if we have an array specification. */ | |
1150 | if (cp_as != NULL) | |
1151 | { | |
1152 | if (sym->as != NULL) | |
1153 | { | |
1154 | gfc_error ("Duplicate array spec for Cray pointee at %C."); | |
1155 | gfc_free_array_spec (cp_as); | |
1156 | m = MATCH_ERROR; | |
1157 | goto cleanup; | |
1158 | } | |
1159 | else | |
1160 | { | |
1161 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1162 | gfc_internal_error ("Couldn't set pointee array spec."); | |
1163 | ||
1164 | /* Fix the array spec. */ | |
1165 | m = gfc_mod_pointee_as (sym->as); | |
1166 | if (m == MATCH_ERROR) | |
1167 | goto cleanup; | |
1168 | } | |
1169 | } | |
1170 | goto cleanup; | |
1171 | } | |
1172 | else | |
1173 | { | |
1174 | gfc_free_array_spec (cp_as); | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | ||
6de9cd9a DN |
1179 | /* OK, we've successfully matched the declaration. Now put the |
1180 | symbol in the current namespace, because it might be used in the | |
69de3b83 | 1181 | optional initialization expression for this symbol, e.g. this is |
6de9cd9a DN |
1182 | perfectly legal: |
1183 | ||
1184 | integer, parameter :: i = huge(i) | |
1185 | ||
1186 | This is only true for parameters or variables of a basic type. | |
1187 | For components of derived types, it is not true, so we don't | |
1188 | create a symbol for those yet. If we fail to create the symbol, | |
1189 | bail out. */ | |
1190 | if (gfc_current_state () != COMP_DERIVED | |
1191 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1192 | { | |
72af9f0b PT |
1193 | m = MATCH_ERROR; |
1194 | goto cleanup; | |
1195 | } | |
1196 | ||
1197 | /* An interface body specifies all of the procedure's characteristics and these | |
1198 | shall be consistent with those specified in the procedure definition, except | |
1199 | that the interface may specify a procedure that is not pure if the procedure | |
1200 | is defined to be pure(12.3.2). */ | |
1201 | if (current_ts.type == BT_DERIVED | |
1202 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
1203 | && current_ts.derived->ns != gfc_current_ns) | |
1204 | { | |
1205 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1206 | "interface", name); | |
6de9cd9a DN |
1207 | m = MATCH_ERROR; |
1208 | goto cleanup; | |
1209 | } | |
1210 | ||
1211 | /* In functions that have a RESULT variable defined, the function | |
1212 | name always refers to function calls. Therefore, the name is | |
1213 | not allowed to appear in specification statements. */ | |
1214 | if (gfc_current_state () == COMP_FUNCTION | |
1215 | && gfc_current_block () != NULL | |
1216 | && gfc_current_block ()->result != NULL | |
1217 | && gfc_current_block ()->result != gfc_current_block () | |
1218 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1219 | { | |
1220 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1221 | m = MATCH_ERROR; | |
1222 | goto cleanup; | |
1223 | } | |
1224 | ||
294fbfc8 TS |
1225 | /* We allow old-style initializations of the form |
1226 | integer i /2/, j(4) /3*3, 1/ | |
1227 | (if no colon has been seen). These are different from data | |
1228 | statements in that initializers are only allowed to apply to the | |
1229 | variable immediately preceding, i.e. | |
1230 | integer i, j /1, 2/ | |
1231 | is not allowed. Therefore we have to do some work manually, that | |
75d17889 | 1232 | could otherwise be left to the matchers for DATA statements. */ |
294fbfc8 TS |
1233 | |
1234 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1235 | { | |
1236 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1237 | "initialization at %C") == FAILURE) | |
1238 | return MATCH_ERROR; | |
1239 | ||
1240 | return match_old_style_init (name); | |
1241 | } | |
1242 | ||
6de9cd9a DN |
1243 | /* The double colon must be present in order to have initializers. |
1244 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1245 | if (colon_seen) | |
1246 | { | |
1247 | if (gfc_match (" =>") == MATCH_YES) | |
1248 | { | |
1249 | ||
1250 | if (!current_attr.pointer) | |
1251 | { | |
1252 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1253 | m = MATCH_ERROR; | |
1254 | goto cleanup; | |
1255 | } | |
1256 | ||
1257 | m = gfc_match_null (&initializer); | |
1258 | if (m == MATCH_NO) | |
1259 | { | |
def66134 | 1260 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
6de9cd9a DN |
1261 | m = MATCH_ERROR; |
1262 | } | |
1263 | ||
1264 | if (gfc_pure (NULL)) | |
1265 | { | |
1266 | gfc_error | |
1267 | ("Initialization of pointer at %C is not allowed in a " | |
1268 | "PURE procedure"); | |
1269 | m = MATCH_ERROR; | |
1270 | } | |
1271 | ||
1272 | if (m != MATCH_YES) | |
1273 | goto cleanup; | |
1274 | ||
6de9cd9a DN |
1275 | } |
1276 | else if (gfc_match_char ('=') == MATCH_YES) | |
1277 | { | |
1278 | if (current_attr.pointer) | |
1279 | { | |
1280 | gfc_error | |
1281 | ("Pointer initialization at %C requires '=>', not '='"); | |
1282 | m = MATCH_ERROR; | |
1283 | goto cleanup; | |
1284 | } | |
1285 | ||
1286 | m = gfc_match_init_expr (&initializer); | |
1287 | if (m == MATCH_NO) | |
1288 | { | |
1289 | gfc_error ("Expected an initialization expression at %C"); | |
1290 | m = MATCH_ERROR; | |
1291 | } | |
1292 | ||
1293 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1294 | { | |
1295 | gfc_error | |
1296 | ("Initialization of variable at %C is not allowed in a " | |
1297 | "PURE procedure"); | |
1298 | m = MATCH_ERROR; | |
1299 | } | |
1300 | ||
1301 | if (m != MATCH_YES) | |
1302 | goto cleanup; | |
1303 | } | |
cb44ab82 VL |
1304 | } |
1305 | ||
5046aff5 PT |
1306 | if (initializer != NULL && current_attr.allocatable |
1307 | && gfc_current_state () == COMP_DERIVED) | |
1308 | { | |
1309 | gfc_error ("Initialization of allocatable component at %C is not allowed"); | |
1310 | m = MATCH_ERROR; | |
1311 | goto cleanup; | |
1312 | } | |
1313 | ||
25d8f0a2 TS |
1314 | /* Check if we are parsing an enumeration and if the current enumerator |
1315 | variable has an initializer or not. If it does not have an | |
1316 | initializer, the initialization value of the previous enumerator | |
1317 | (stored in last_initializer) is incremented by 1 and is used to | |
1318 | initialize the current enumerator. */ | |
1319 | if (gfc_current_state () == COMP_ENUM) | |
1320 | { | |
1321 | if (initializer == NULL) | |
1322 | initializer = gfc_enum_initializer (last_initializer, old_locus); | |
1323 | ||
1324 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) | |
1325 | { | |
1326 | gfc_error("ENUMERATOR %L not initialized with integer expression", | |
1327 | &var_locus); | |
1328 | m = MATCH_ERROR; | |
1329 | gfc_free_enum_history (); | |
1330 | goto cleanup; | |
1331 | } | |
1332 | ||
1333 | /* Store this current initializer, for the next enumerator | |
1334 | variable to be parsed. */ | |
1335 | last_initializer = initializer; | |
1336 | } | |
1337 | ||
54b4ba60 | 1338 | /* Add the initializer. Note that it is fine if initializer is |
6de9cd9a DN |
1339 | NULL here, because we sometimes also need to check if a |
1340 | declaration *must* have an initialization expression. */ | |
1341 | if (gfc_current_state () != COMP_DERIVED) | |
1342 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1343 | else | |
54b4ba60 | 1344 | { |
5046aff5 PT |
1345 | if (current_ts.type == BT_DERIVED |
1346 | && !current_attr.pointer | |
1347 | && !initializer) | |
54b4ba60 PB |
1348 | initializer = gfc_default_initializer (¤t_ts); |
1349 | t = build_struct (name, cl, &initializer, &as); | |
1350 | } | |
6de9cd9a DN |
1351 | |
1352 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1353 | ||
1354 | cleanup: | |
1355 | /* Free stuff up and return. */ | |
1356 | gfc_free_expr (initializer); | |
1357 | gfc_free_array_spec (as); | |
1358 | ||
1359 | return m; | |
1360 | } | |
1361 | ||
1362 | ||
1363 | /* Match an extended-f77 kind specification. */ | |
1364 | ||
1365 | match | |
1366 | gfc_match_old_kind_spec (gfc_typespec * ts) | |
1367 | { | |
1368 | match m; | |
5cf54585 | 1369 | int original_kind; |
6de9cd9a DN |
1370 | |
1371 | if (gfc_match_char ('*') != MATCH_YES) | |
1372 | return MATCH_NO; | |
1373 | ||
5cf54585 | 1374 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
6de9cd9a DN |
1375 | if (m != MATCH_YES) |
1376 | return MATCH_ERROR; | |
1377 | ||
e45b3c75 ES |
1378 | original_kind = ts->kind; |
1379 | ||
6de9cd9a | 1380 | /* Massage the kind numbers for complex types. */ |
e45b3c75 ES |
1381 | if (ts->type == BT_COMPLEX) |
1382 | { | |
1383 | if (ts->kind % 2) | |
1384 | { | |
1385 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1386 | gfc_basic_typename (ts->type), original_kind); | |
1387 | return MATCH_ERROR; | |
1388 | } | |
1389 | ts->kind /= 2; | |
1390 | } | |
6de9cd9a | 1391 | |
e7a2d5fb | 1392 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a | 1393 | { |
e45b3c75 ES |
1394 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
1395 | gfc_basic_typename (ts->type), original_kind); | |
6de9cd9a DN |
1396 | return MATCH_ERROR; |
1397 | } | |
1398 | ||
df8652dc SK |
1399 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
1400 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1401 | return MATCH_ERROR; | |
1402 | ||
6de9cd9a DN |
1403 | return MATCH_YES; |
1404 | } | |
1405 | ||
1406 | ||
1407 | /* Match a kind specification. Since kinds are generally optional, we | |
1408 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1409 | string is found, then we know we have an error. */ | |
1410 | ||
1411 | match | |
1412 | gfc_match_kind_spec (gfc_typespec * ts) | |
1413 | { | |
1414 | locus where; | |
1415 | gfc_expr *e; | |
1416 | match m, n; | |
1417 | const char *msg; | |
1418 | ||
1419 | m = MATCH_NO; | |
1420 | e = NULL; | |
1421 | ||
63645982 | 1422 | where = gfc_current_locus; |
6de9cd9a DN |
1423 | |
1424 | if (gfc_match_char ('(') == MATCH_NO) | |
1425 | return MATCH_NO; | |
1426 | ||
1427 | /* Also gobbles optional text. */ | |
1428 | if (gfc_match (" kind = ") == MATCH_YES) | |
1429 | m = MATCH_ERROR; | |
1430 | ||
1431 | n = gfc_match_init_expr (&e); | |
1432 | if (n == MATCH_NO) | |
1433 | gfc_error ("Expected initialization expression at %C"); | |
1434 | if (n != MATCH_YES) | |
1435 | return MATCH_ERROR; | |
1436 | ||
1437 | if (e->rank != 0) | |
1438 | { | |
1439 | gfc_error ("Expected scalar initialization expression at %C"); | |
1440 | m = MATCH_ERROR; | |
1441 | goto no_match; | |
1442 | } | |
1443 | ||
1444 | msg = gfc_extract_int (e, &ts->kind); | |
1445 | if (msg != NULL) | |
1446 | { | |
1447 | gfc_error (msg); | |
1448 | m = MATCH_ERROR; | |
1449 | goto no_match; | |
1450 | } | |
1451 | ||
1452 | gfc_free_expr (e); | |
1453 | e = NULL; | |
1454 | ||
e7a2d5fb | 1455 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a DN |
1456 | { |
1457 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
1458 | gfc_basic_typename (ts->type)); | |
1459 | ||
1460 | m = MATCH_ERROR; | |
1461 | goto no_match; | |
1462 | } | |
1463 | ||
1464 | if (gfc_match_char (')') != MATCH_YES) | |
1465 | { | |
1466 | gfc_error ("Missing right paren at %C"); | |
1467 | goto no_match; | |
1468 | } | |
1469 | ||
1470 | return MATCH_YES; | |
1471 | ||
1472 | no_match: | |
1473 | gfc_free_expr (e); | |
63645982 | 1474 | gfc_current_locus = where; |
6de9cd9a DN |
1475 | return m; |
1476 | } | |
1477 | ||
1478 | ||
1479 | /* Match the various kind/length specifications in a CHARACTER | |
1480 | declaration. We don't return MATCH_NO. */ | |
1481 | ||
1482 | static match | |
1483 | match_char_spec (gfc_typespec * ts) | |
1484 | { | |
1485 | int i, kind, seen_length; | |
1486 | gfc_charlen *cl; | |
1487 | gfc_expr *len; | |
1488 | match m; | |
1489 | ||
9d64df18 | 1490 | kind = gfc_default_character_kind; |
6de9cd9a DN |
1491 | len = NULL; |
1492 | seen_length = 0; | |
1493 | ||
1494 | /* Try the old-style specification first. */ | |
1495 | old_char_selector = 0; | |
1496 | ||
1497 | m = match_char_length (&len); | |
1498 | if (m != MATCH_NO) | |
1499 | { | |
1500 | if (m == MATCH_YES) | |
1501 | old_char_selector = 1; | |
1502 | seen_length = 1; | |
1503 | goto done; | |
1504 | } | |
1505 | ||
1506 | m = gfc_match_char ('('); | |
1507 | if (m != MATCH_YES) | |
1508 | { | |
1509 | m = MATCH_YES; /* character without length is a single char */ | |
1510 | goto done; | |
1511 | } | |
1512 | ||
1513 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ) */ | |
1514 | if (gfc_match (" kind =") == MATCH_YES) | |
1515 | { | |
1516 | m = gfc_match_small_int (&kind); | |
1517 | if (m == MATCH_ERROR) | |
1518 | goto done; | |
1519 | if (m == MATCH_NO) | |
1520 | goto syntax; | |
1521 | ||
1522 | if (gfc_match (" , len =") == MATCH_NO) | |
1523 | goto rparen; | |
1524 | ||
1525 | m = char_len_param_value (&len); | |
1526 | if (m == MATCH_NO) | |
1527 | goto syntax; | |
1528 | if (m == MATCH_ERROR) | |
1529 | goto done; | |
1530 | seen_length = 1; | |
1531 | ||
1532 | goto rparen; | |
1533 | } | |
1534 | ||
1535 | /* Try to match ( LEN = <len-param> ) or ( LEN = <len-param>, KIND = <int> ) */ | |
1536 | if (gfc_match (" len =") == MATCH_YES) | |
1537 | { | |
1538 | m = char_len_param_value (&len); | |
1539 | if (m == MATCH_NO) | |
1540 | goto syntax; | |
1541 | if (m == MATCH_ERROR) | |
1542 | goto done; | |
1543 | seen_length = 1; | |
1544 | ||
1545 | if (gfc_match_char (')') == MATCH_YES) | |
1546 | goto done; | |
1547 | ||
1548 | if (gfc_match (" , kind =") != MATCH_YES) | |
1549 | goto syntax; | |
1550 | ||
1551 | gfc_match_small_int (&kind); | |
1552 | ||
e7a2d5fb | 1553 | if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
6de9cd9a DN |
1554 | { |
1555 | gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); | |
1556 | return MATCH_YES; | |
1557 | } | |
1558 | ||
1559 | goto rparen; | |
1560 | } | |
1561 | ||
1562 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ) */ | |
1563 | m = char_len_param_value (&len); | |
1564 | if (m == MATCH_NO) | |
1565 | goto syntax; | |
1566 | if (m == MATCH_ERROR) | |
1567 | goto done; | |
1568 | seen_length = 1; | |
1569 | ||
1570 | m = gfc_match_char (')'); | |
1571 | if (m == MATCH_YES) | |
1572 | goto done; | |
1573 | ||
1574 | if (gfc_match_char (',') != MATCH_YES) | |
1575 | goto syntax; | |
1576 | ||
1577 | gfc_match (" kind ="); /* Gobble optional text */ | |
1578 | ||
1579 | m = gfc_match_small_int (&kind); | |
1580 | if (m == MATCH_ERROR) | |
1581 | goto done; | |
1582 | if (m == MATCH_NO) | |
1583 | goto syntax; | |
1584 | ||
1585 | rparen: | |
1586 | /* Require a right-paren at this point. */ | |
1587 | m = gfc_match_char (')'); | |
1588 | if (m == MATCH_YES) | |
1589 | goto done; | |
1590 | ||
1591 | syntax: | |
1592 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
1593 | m = MATCH_ERROR; | |
1594 | ||
1595 | done: | |
e7a2d5fb | 1596 | if (m == MATCH_YES && gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
6de9cd9a DN |
1597 | { |
1598 | gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); | |
1599 | m = MATCH_ERROR; | |
1600 | } | |
1601 | ||
1602 | if (m != MATCH_YES) | |
1603 | { | |
1604 | gfc_free_expr (len); | |
1605 | return m; | |
1606 | } | |
1607 | ||
1608 | /* Do some final massaging of the length values. */ | |
1609 | cl = gfc_get_charlen (); | |
1610 | cl->next = gfc_current_ns->cl_list; | |
1611 | gfc_current_ns->cl_list = cl; | |
1612 | ||
1613 | if (seen_length == 0) | |
1614 | cl->length = gfc_int_expr (1); | |
1615 | else | |
1616 | { | |
1617 | if (len == NULL || gfc_extract_int (len, &i) != NULL || i >= 0) | |
1618 | cl->length = len; | |
1619 | else | |
1620 | { | |
1621 | gfc_free_expr (len); | |
1622 | cl->length = gfc_int_expr (0); | |
1623 | } | |
1624 | } | |
1625 | ||
1626 | ts->cl = cl; | |
1627 | ts->kind = kind; | |
1628 | ||
1629 | return MATCH_YES; | |
1630 | } | |
1631 | ||
1632 | ||
1633 | /* Matches a type specification. If successful, sets the ts structure | |
1634 | to the matched specification. This is necessary for FUNCTION and | |
1635 | IMPLICIT statements. | |
1636 | ||
e5ddaa24 TS |
1637 | If implicit_flag is nonzero, then we don't check for the optional |
1638 | kind specification. Not doing so is needed for matching an IMPLICIT | |
6de9cd9a DN |
1639 | statement correctly. */ |
1640 | ||
e5ddaa24 TS |
1641 | static match |
1642 | match_type_spec (gfc_typespec * ts, int implicit_flag) | |
6de9cd9a DN |
1643 | { |
1644 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1645 | gfc_symbol *sym; | |
1646 | match m; | |
0ff0dfbf | 1647 | int c; |
6de9cd9a DN |
1648 | |
1649 | gfc_clear_ts (ts); | |
1650 | ||
5f700e6d AL |
1651 | if (gfc_match (" byte") == MATCH_YES) |
1652 | { | |
1653 | if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C") | |
1654 | == FAILURE) | |
1655 | return MATCH_ERROR; | |
1656 | ||
1657 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
1658 | { | |
1659 | gfc_error ("BYTE type used at %C " | |
1660 | "is not available on the target machine"); | |
1661 | return MATCH_ERROR; | |
1662 | } | |
1663 | ||
1664 | ts->type = BT_INTEGER; | |
1665 | ts->kind = 1; | |
1666 | return MATCH_YES; | |
1667 | } | |
1668 | ||
6de9cd9a DN |
1669 | if (gfc_match (" integer") == MATCH_YES) |
1670 | { | |
1671 | ts->type = BT_INTEGER; | |
9d64df18 | 1672 | ts->kind = gfc_default_integer_kind; |
6de9cd9a DN |
1673 | goto get_kind; |
1674 | } | |
1675 | ||
1676 | if (gfc_match (" character") == MATCH_YES) | |
1677 | { | |
1678 | ts->type = BT_CHARACTER; | |
e5ddaa24 TS |
1679 | if (implicit_flag == 0) |
1680 | return match_char_spec (ts); | |
1681 | else | |
1682 | return MATCH_YES; | |
6de9cd9a DN |
1683 | } |
1684 | ||
1685 | if (gfc_match (" real") == MATCH_YES) | |
1686 | { | |
1687 | ts->type = BT_REAL; | |
9d64df18 | 1688 | ts->kind = gfc_default_real_kind; |
6de9cd9a DN |
1689 | goto get_kind; |
1690 | } | |
1691 | ||
1692 | if (gfc_match (" double precision") == MATCH_YES) | |
1693 | { | |
1694 | ts->type = BT_REAL; | |
9d64df18 | 1695 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
1696 | return MATCH_YES; |
1697 | } | |
1698 | ||
1699 | if (gfc_match (" complex") == MATCH_YES) | |
1700 | { | |
1701 | ts->type = BT_COMPLEX; | |
9d64df18 | 1702 | ts->kind = gfc_default_complex_kind; |
6de9cd9a DN |
1703 | goto get_kind; |
1704 | } | |
1705 | ||
1706 | if (gfc_match (" double complex") == MATCH_YES) | |
1707 | { | |
df8652dc SK |
1708 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
1709 | "conform to the Fortran 95 standard") == FAILURE) | |
1710 | return MATCH_ERROR; | |
1711 | ||
6de9cd9a | 1712 | ts->type = BT_COMPLEX; |
9d64df18 | 1713 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
1714 | return MATCH_YES; |
1715 | } | |
1716 | ||
1717 | if (gfc_match (" logical") == MATCH_YES) | |
1718 | { | |
1719 | ts->type = BT_LOGICAL; | |
9d64df18 | 1720 | ts->kind = gfc_default_logical_kind; |
6de9cd9a DN |
1721 | goto get_kind; |
1722 | } | |
1723 | ||
1724 | m = gfc_match (" type ( %n )", name); | |
1725 | if (m != MATCH_YES) | |
1726 | return m; | |
1727 | ||
1728 | /* Search for the name but allow the components to be defined later. */ | |
1729 | if (gfc_get_ha_symbol (name, &sym)) | |
1730 | { | |
1731 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
1732 | return MATCH_ERROR; | |
1733 | } | |
1734 | ||
1735 | if (sym->attr.flavor != FL_DERIVED | |
231b2fcc | 1736 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
1737 | return MATCH_ERROR; |
1738 | ||
1739 | ts->type = BT_DERIVED; | |
1740 | ts->kind = 0; | |
1741 | ts->derived = sym; | |
1742 | ||
1743 | return MATCH_YES; | |
1744 | ||
1745 | get_kind: | |
1746 | /* For all types except double, derived and character, look for an | |
1747 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
e5ddaa24 | 1748 | if (implicit_flag == 1) |
6de9cd9a DN |
1749 | return MATCH_YES; |
1750 | ||
0ff0dfbf TS |
1751 | if (gfc_current_form == FORM_FREE) |
1752 | { | |
1753 | c = gfc_peek_char(); | |
1754 | if (!gfc_is_whitespace(c) && c != '*' && c != '(' | |
1755 | && c != ':' && c != ',') | |
1756 | return MATCH_NO; | |
1757 | } | |
1758 | ||
6de9cd9a DN |
1759 | m = gfc_match_kind_spec (ts); |
1760 | if (m == MATCH_NO && ts->type != BT_CHARACTER) | |
1761 | m = gfc_match_old_kind_spec (ts); | |
1762 | ||
1763 | if (m == MATCH_NO) | |
1764 | m = MATCH_YES; /* No kind specifier found. */ | |
1765 | ||
1766 | return m; | |
1767 | } | |
1768 | ||
1769 | ||
e5ddaa24 TS |
1770 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
1771 | already matched in parse.c, or we would not end up here in the | |
1772 | first place. So the only thing we need to check, is if there is | |
1773 | trailing garbage. If not, the match is successful. */ | |
1774 | ||
1775 | match | |
1776 | gfc_match_implicit_none (void) | |
1777 | { | |
1778 | ||
1779 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; | |
1780 | } | |
1781 | ||
1782 | ||
1783 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
1784 | ||
1785 | static match | |
1107b970 | 1786 | match_implicit_range (void) |
e5ddaa24 TS |
1787 | { |
1788 | int c, c1, c2, inner; | |
1789 | locus cur_loc; | |
1790 | ||
1791 | cur_loc = gfc_current_locus; | |
1792 | ||
1793 | gfc_gobble_whitespace (); | |
1794 | c = gfc_next_char (); | |
1795 | if (c != '(') | |
1796 | { | |
1797 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
1798 | goto bad; | |
1799 | } | |
1800 | ||
1801 | inner = 1; | |
1802 | while (inner) | |
1803 | { | |
1804 | gfc_gobble_whitespace (); | |
1805 | c1 = gfc_next_char (); | |
1806 | if (!ISALPHA (c1)) | |
1807 | goto bad; | |
1808 | ||
1809 | gfc_gobble_whitespace (); | |
1810 | c = gfc_next_char (); | |
1811 | ||
1812 | switch (c) | |
1813 | { | |
1814 | case ')': | |
1815 | inner = 0; /* Fall through */ | |
1816 | ||
1817 | case ',': | |
1818 | c2 = c1; | |
1819 | break; | |
1820 | ||
1821 | case '-': | |
1822 | gfc_gobble_whitespace (); | |
1823 | c2 = gfc_next_char (); | |
1824 | if (!ISALPHA (c2)) | |
1825 | goto bad; | |
1826 | ||
1827 | gfc_gobble_whitespace (); | |
1828 | c = gfc_next_char (); | |
1829 | ||
1830 | if ((c != ',') && (c != ')')) | |
1831 | goto bad; | |
1832 | if (c == ')') | |
1833 | inner = 0; | |
1834 | ||
1835 | break; | |
1836 | ||
1837 | default: | |
1838 | goto bad; | |
1839 | } | |
1840 | ||
1841 | if (c1 > c2) | |
1842 | { | |
1843 | gfc_error ("Letters must be in alphabetic order in " | |
1844 | "IMPLICIT statement at %C"); | |
1845 | goto bad; | |
1846 | } | |
1847 | ||
1848 | /* See if we can add the newly matched range to the pending | |
1849 | implicits from this IMPLICIT statement. We do not check for | |
1850 | conflicts with whatever earlier IMPLICIT statements may have | |
1851 | set. This is done when we've successfully finished matching | |
1852 | the current one. */ | |
1107b970 | 1853 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
e5ddaa24 TS |
1854 | goto bad; |
1855 | } | |
1856 | ||
1857 | return MATCH_YES; | |
1858 | ||
1859 | bad: | |
1860 | gfc_syntax_error (ST_IMPLICIT); | |
1861 | ||
1862 | gfc_current_locus = cur_loc; | |
1863 | return MATCH_ERROR; | |
1864 | } | |
1865 | ||
1866 | ||
1867 | /* Match an IMPLICIT statement, storing the types for | |
1868 | gfc_set_implicit() if the statement is accepted by the parser. | |
1869 | There is a strange looking, but legal syntactic construction | |
1870 | possible. It looks like: | |
1871 | ||
1872 | IMPLICIT INTEGER (a-b) (c-d) | |
1873 | ||
1874 | This is legal if "a-b" is a constant expression that happens to | |
1875 | equal one of the legal kinds for integers. The real problem | |
1876 | happens with an implicit specification that looks like: | |
1877 | ||
1878 | IMPLICIT INTEGER (a-b) | |
1879 | ||
1880 | In this case, a typespec matcher that is "greedy" (as most of the | |
1881 | matchers are) gobbles the character range as a kindspec, leaving | |
1882 | nothing left. We therefore have to go a bit more slowly in the | |
1883 | matching process by inhibiting the kindspec checking during | |
1884 | typespec matching and checking for a kind later. */ | |
1885 | ||
1886 | match | |
1887 | gfc_match_implicit (void) | |
1888 | { | |
1889 | gfc_typespec ts; | |
1890 | locus cur_loc; | |
1891 | int c; | |
1892 | match m; | |
1893 | ||
1894 | /* We don't allow empty implicit statements. */ | |
1895 | if (gfc_match_eos () == MATCH_YES) | |
1896 | { | |
1897 | gfc_error ("Empty IMPLICIT statement at %C"); | |
1898 | return MATCH_ERROR; | |
1899 | } | |
1900 | ||
e5ddaa24 TS |
1901 | do |
1902 | { | |
1107b970 PB |
1903 | /* First cleanup. */ |
1904 | gfc_clear_new_implicit (); | |
1905 | ||
e5ddaa24 TS |
1906 | /* A basic type is mandatory here. */ |
1907 | m = match_type_spec (&ts, 1); | |
1908 | if (m == MATCH_ERROR) | |
1909 | goto error; | |
1910 | if (m == MATCH_NO) | |
1911 | goto syntax; | |
1912 | ||
1913 | cur_loc = gfc_current_locus; | |
1107b970 | 1914 | m = match_implicit_range (); |
e5ddaa24 TS |
1915 | |
1916 | if (m == MATCH_YES) | |
1917 | { | |
1107b970 | 1918 | /* We may have <TYPE> (<RANGE>). */ |
e5ddaa24 TS |
1919 | gfc_gobble_whitespace (); |
1920 | c = gfc_next_char (); | |
1921 | if ((c == '\n') || (c == ',')) | |
1107b970 PB |
1922 | { |
1923 | /* Check for CHARACTER with no length parameter. */ | |
1924 | if (ts.type == BT_CHARACTER && !ts.cl) | |
1925 | { | |
9d64df18 | 1926 | ts.kind = gfc_default_character_kind; |
1107b970 PB |
1927 | ts.cl = gfc_get_charlen (); |
1928 | ts.cl->next = gfc_current_ns->cl_list; | |
1929 | gfc_current_ns->cl_list = ts.cl; | |
1930 | ts.cl->length = gfc_int_expr (1); | |
1931 | } | |
1932 | ||
1933 | /* Record the Successful match. */ | |
1934 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
1935 | return MATCH_ERROR; | |
1936 | continue; | |
1937 | } | |
e5ddaa24 TS |
1938 | |
1939 | gfc_current_locus = cur_loc; | |
1940 | } | |
1941 | ||
1107b970 PB |
1942 | /* Discard the (incorrectly) matched range. */ |
1943 | gfc_clear_new_implicit (); | |
1944 | ||
1945 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
1946 | if (ts.type == BT_CHARACTER) | |
1947 | m = match_char_spec (&ts); | |
1948 | else | |
e5ddaa24 | 1949 | { |
1107b970 | 1950 | m = gfc_match_kind_spec (&ts); |
e5ddaa24 | 1951 | if (m == MATCH_NO) |
1107b970 PB |
1952 | { |
1953 | m = gfc_match_old_kind_spec (&ts); | |
1954 | if (m == MATCH_ERROR) | |
1955 | goto error; | |
1956 | if (m == MATCH_NO) | |
1957 | goto syntax; | |
1958 | } | |
e5ddaa24 | 1959 | } |
1107b970 PB |
1960 | if (m == MATCH_ERROR) |
1961 | goto error; | |
e5ddaa24 | 1962 | |
1107b970 | 1963 | m = match_implicit_range (); |
e5ddaa24 TS |
1964 | if (m == MATCH_ERROR) |
1965 | goto error; | |
1966 | if (m == MATCH_NO) | |
1967 | goto syntax; | |
1968 | ||
1969 | gfc_gobble_whitespace (); | |
1970 | c = gfc_next_char (); | |
1971 | if ((c != '\n') && (c != ',')) | |
1972 | goto syntax; | |
1973 | ||
1107b970 PB |
1974 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
1975 | return MATCH_ERROR; | |
e5ddaa24 TS |
1976 | } |
1977 | while (c == ','); | |
1978 | ||
1107b970 | 1979 | return MATCH_YES; |
e5ddaa24 TS |
1980 | |
1981 | syntax: | |
1982 | gfc_syntax_error (ST_IMPLICIT); | |
1983 | ||
1984 | error: | |
1985 | return MATCH_ERROR; | |
1986 | } | |
1987 | ||
1988 | ||
6de9cd9a DN |
1989 | /* Matches an attribute specification including array specs. If |
1990 | successful, leaves the variables current_attr and current_as | |
1991 | holding the specification. Also sets the colon_seen variable for | |
1992 | later use by matchers associated with initializations. | |
1993 | ||
1994 | This subroutine is a little tricky in the sense that we don't know | |
1995 | if we really have an attr-spec until we hit the double colon. | |
1996 | Until that time, we can only return MATCH_NO. This forces us to | |
1997 | check for duplicate specification at this level. */ | |
1998 | ||
1999 | static match | |
2000 | match_attr_spec (void) | |
2001 | { | |
2002 | ||
2003 | /* Modifiers that can exist in a type statement. */ | |
2004 | typedef enum | |
2005 | { GFC_DECL_BEGIN = 0, | |
2006 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
2007 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
2008 | DECL_PARAMETER, DECL_POINTER, DECL_PRIVATE, DECL_PUBLIC, DECL_SAVE, | |
2009 | DECL_TARGET, DECL_COLON, DECL_NONE, | |
2010 | GFC_DECL_END /* Sentinel */ | |
2011 | } | |
2012 | decl_types; | |
2013 | ||
2014 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
2015 | #define NUM_DECL GFC_DECL_END | |
2016 | ||
2017 | static mstring decls[] = { | |
2018 | minit (", allocatable", DECL_ALLOCATABLE), | |
2019 | minit (", dimension", DECL_DIMENSION), | |
2020 | minit (", external", DECL_EXTERNAL), | |
2021 | minit (", intent ( in )", DECL_IN), | |
2022 | minit (", intent ( out )", DECL_OUT), | |
2023 | minit (", intent ( in out )", DECL_INOUT), | |
2024 | minit (", intrinsic", DECL_INTRINSIC), | |
2025 | minit (", optional", DECL_OPTIONAL), | |
2026 | minit (", parameter", DECL_PARAMETER), | |
2027 | minit (", pointer", DECL_POINTER), | |
2028 | minit (", private", DECL_PRIVATE), | |
2029 | minit (", public", DECL_PUBLIC), | |
2030 | minit (", save", DECL_SAVE), | |
2031 | minit (", target", DECL_TARGET), | |
2032 | minit ("::", DECL_COLON), | |
2033 | minit (NULL, DECL_NONE) | |
2034 | }; | |
2035 | ||
2036 | locus start, seen_at[NUM_DECL]; | |
2037 | int seen[NUM_DECL]; | |
2038 | decl_types d; | |
2039 | const char *attr; | |
2040 | match m; | |
2041 | try t; | |
2042 | ||
2043 | gfc_clear_attr (¤t_attr); | |
63645982 | 2044 | start = gfc_current_locus; |
6de9cd9a DN |
2045 | |
2046 | current_as = NULL; | |
2047 | colon_seen = 0; | |
2048 | ||
2049 | /* See if we get all of the keywords up to the final double colon. */ | |
2050 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2051 | seen[d] = 0; | |
2052 | ||
2053 | for (;;) | |
2054 | { | |
2055 | d = (decl_types) gfc_match_strings (decls); | |
2056 | if (d == DECL_NONE || d == DECL_COLON) | |
2057 | break; | |
25d8f0a2 TS |
2058 | |
2059 | if (gfc_current_state () == COMP_ENUM) | |
2060 | { | |
2061 | gfc_error ("Enumerator cannot have attributes %C"); | |
2062 | return MATCH_ERROR; | |
2063 | } | |
6de9cd9a DN |
2064 | |
2065 | seen[d]++; | |
63645982 | 2066 | seen_at[d] = gfc_current_locus; |
6de9cd9a DN |
2067 | |
2068 | if (d == DECL_DIMENSION) | |
2069 | { | |
2070 | m = gfc_match_array_spec (¤t_as); | |
2071 | ||
2072 | if (m == MATCH_NO) | |
2073 | { | |
2074 | gfc_error ("Missing dimension specification at %C"); | |
2075 | m = MATCH_ERROR; | |
2076 | } | |
2077 | ||
2078 | if (m == MATCH_ERROR) | |
2079 | goto cleanup; | |
2080 | } | |
2081 | } | |
2082 | ||
831d7813 | 2083 | /* If we are parsing an enumeration and have ensured that no other |
25d8f0a2 TS |
2084 | attributes are present we can now set the parameter attribute. */ |
2085 | if (gfc_current_state () == COMP_ENUM) | |
2086 | { | |
2087 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
2088 | if (t == FAILURE) | |
2089 | { | |
2090 | m = MATCH_ERROR; | |
2091 | goto cleanup; | |
2092 | } | |
2093 | } | |
2094 | ||
6de9cd9a DN |
2095 | /* No double colon, so assume that we've been looking at something |
2096 | else the whole time. */ | |
2097 | if (d == DECL_NONE) | |
2098 | { | |
2099 | m = MATCH_NO; | |
2100 | goto cleanup; | |
2101 | } | |
2102 | ||
2103 | /* Since we've seen a double colon, we have to be looking at an | |
2104 | attr-spec. This means that we can now issue errors. */ | |
2105 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2106 | if (seen[d] > 1) | |
2107 | { | |
2108 | switch (d) | |
2109 | { | |
2110 | case DECL_ALLOCATABLE: | |
2111 | attr = "ALLOCATABLE"; | |
2112 | break; | |
2113 | case DECL_DIMENSION: | |
2114 | attr = "DIMENSION"; | |
2115 | break; | |
2116 | case DECL_EXTERNAL: | |
2117 | attr = "EXTERNAL"; | |
2118 | break; | |
2119 | case DECL_IN: | |
2120 | attr = "INTENT (IN)"; | |
2121 | break; | |
2122 | case DECL_OUT: | |
2123 | attr = "INTENT (OUT)"; | |
2124 | break; | |
2125 | case DECL_INOUT: | |
2126 | attr = "INTENT (IN OUT)"; | |
2127 | break; | |
2128 | case DECL_INTRINSIC: | |
2129 | attr = "INTRINSIC"; | |
2130 | break; | |
2131 | case DECL_OPTIONAL: | |
2132 | attr = "OPTIONAL"; | |
2133 | break; | |
2134 | case DECL_PARAMETER: | |
2135 | attr = "PARAMETER"; | |
2136 | break; | |
2137 | case DECL_POINTER: | |
2138 | attr = "POINTER"; | |
2139 | break; | |
2140 | case DECL_PRIVATE: | |
2141 | attr = "PRIVATE"; | |
2142 | break; | |
2143 | case DECL_PUBLIC: | |
2144 | attr = "PUBLIC"; | |
2145 | break; | |
2146 | case DECL_SAVE: | |
2147 | attr = "SAVE"; | |
2148 | break; | |
2149 | case DECL_TARGET: | |
2150 | attr = "TARGET"; | |
2151 | break; | |
2152 | default: | |
2153 | attr = NULL; /* This shouldn't happen */ | |
2154 | } | |
2155 | ||
2156 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
2157 | m = MATCH_ERROR; | |
2158 | goto cleanup; | |
2159 | } | |
2160 | ||
2161 | /* Now that we've dealt with duplicate attributes, add the attributes | |
2162 | to the current attribute. */ | |
2163 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2164 | { | |
2165 | if (seen[d] == 0) | |
2166 | continue; | |
2167 | ||
2168 | if (gfc_current_state () == COMP_DERIVED | |
2169 | && d != DECL_DIMENSION && d != DECL_POINTER | |
2170 | && d != DECL_COLON && d != DECL_NONE) | |
2171 | { | |
5046aff5 PT |
2172 | if (d == DECL_ALLOCATABLE) |
2173 | { | |
2174 | if (gfc_notify_std (GFC_STD_F2003, | |
2175 | "In the selected standard, the ALLOCATABLE " | |
2176 | "attribute at %C is not allowed in a TYPE " | |
2177 | "definition") == FAILURE) | |
2178 | { | |
2179 | m = MATCH_ERROR; | |
2180 | goto cleanup; | |
2181 | } | |
2182 | } | |
2183 | else | |
2184 | { | |
2185 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
2186 | &seen_at[d]); | |
2187 | m = MATCH_ERROR; | |
2188 | goto cleanup; | |
2189 | } | |
6de9cd9a DN |
2190 | } |
2191 | ||
4213f93b PT |
2192 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
2193 | && gfc_current_state () != COMP_MODULE) | |
2194 | { | |
2195 | if (d == DECL_PRIVATE) | |
2196 | attr = "PRIVATE"; | |
2197 | else | |
2198 | attr = "PUBLIC"; | |
2199 | ||
2200 | gfc_error ("%s attribute at %L is not allowed outside of a MODULE", | |
2201 | attr, &seen_at[d]); | |
2202 | m = MATCH_ERROR; | |
2203 | goto cleanup; | |
2204 | } | |
2205 | ||
6de9cd9a DN |
2206 | switch (d) |
2207 | { | |
2208 | case DECL_ALLOCATABLE: | |
2209 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
2210 | break; | |
2211 | ||
2212 | case DECL_DIMENSION: | |
231b2fcc | 2213 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
2214 | break; |
2215 | ||
2216 | case DECL_EXTERNAL: | |
2217 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
2218 | break; | |
2219 | ||
2220 | case DECL_IN: | |
2221 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
2222 | break; | |
2223 | ||
2224 | case DECL_OUT: | |
2225 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
2226 | break; | |
2227 | ||
2228 | case DECL_INOUT: | |
2229 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
2230 | break; | |
2231 | ||
2232 | case DECL_INTRINSIC: | |
2233 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
2234 | break; | |
2235 | ||
2236 | case DECL_OPTIONAL: | |
2237 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
2238 | break; | |
2239 | ||
2240 | case DECL_PARAMETER: | |
231b2fcc | 2241 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
6de9cd9a DN |
2242 | break; |
2243 | ||
2244 | case DECL_POINTER: | |
2245 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
2246 | break; | |
2247 | ||
2248 | case DECL_PRIVATE: | |
231b2fcc TS |
2249 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
2250 | &seen_at[d]); | |
6de9cd9a DN |
2251 | break; |
2252 | ||
2253 | case DECL_PUBLIC: | |
231b2fcc TS |
2254 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
2255 | &seen_at[d]); | |
6de9cd9a DN |
2256 | break; |
2257 | ||
2258 | case DECL_SAVE: | |
231b2fcc | 2259 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
2260 | break; |
2261 | ||
2262 | case DECL_TARGET: | |
2263 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
2264 | break; | |
2265 | ||
2266 | default: | |
2267 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
2268 | } | |
2269 | ||
2270 | if (t == FAILURE) | |
2271 | { | |
2272 | m = MATCH_ERROR; | |
2273 | goto cleanup; | |
2274 | } | |
2275 | } | |
2276 | ||
2277 | colon_seen = 1; | |
2278 | return MATCH_YES; | |
2279 | ||
2280 | cleanup: | |
63645982 | 2281 | gfc_current_locus = start; |
6de9cd9a DN |
2282 | gfc_free_array_spec (current_as); |
2283 | current_as = NULL; | |
2284 | return m; | |
2285 | } | |
2286 | ||
2287 | ||
2288 | /* Match a data declaration statement. */ | |
2289 | ||
2290 | match | |
2291 | gfc_match_data_decl (void) | |
2292 | { | |
2293 | gfc_symbol *sym; | |
2294 | match m; | |
949d5b72 | 2295 | int elem; |
6de9cd9a | 2296 | |
e5ddaa24 | 2297 | m = match_type_spec (¤t_ts, 0); |
6de9cd9a DN |
2298 | if (m != MATCH_YES) |
2299 | return m; | |
2300 | ||
2301 | if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) | |
2302 | { | |
2303 | sym = gfc_use_derived (current_ts.derived); | |
2304 | ||
2305 | if (sym == NULL) | |
2306 | { | |
2307 | m = MATCH_ERROR; | |
2308 | goto cleanup; | |
2309 | } | |
2310 | ||
2311 | current_ts.derived = sym; | |
2312 | } | |
2313 | ||
2314 | m = match_attr_spec (); | |
2315 | if (m == MATCH_ERROR) | |
2316 | { | |
2317 | m = MATCH_NO; | |
2318 | goto cleanup; | |
2319 | } | |
2320 | ||
2321 | if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL) | |
2322 | { | |
2323 | ||
2324 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
2325 | goto ok; | |
2326 | ||
976e21f6 PT |
2327 | gfc_find_symbol (current_ts.derived->name, |
2328 | current_ts.derived->ns->parent, 1, &sym); | |
6de9cd9a | 2329 | |
976e21f6 PT |
2330 | /* Any symbol that we find had better be a type definition |
2331 | which has its components defined. */ | |
2332 | if (sym != NULL && sym->attr.flavor == FL_DERIVED | |
2333 | && current_ts.derived->components != NULL) | |
6de9cd9a DN |
2334 | goto ok; |
2335 | ||
976e21f6 PT |
2336 | /* Now we have an error, which we signal, and then fix up |
2337 | because the knock-on is plain and simple confusing. */ | |
2338 | gfc_error_now ("Derived type at %C has not been previously defined " | |
2339 | "and so cannot appear in a derived type definition."); | |
2340 | current_attr.pointer = 1; | |
2341 | goto ok; | |
6de9cd9a DN |
2342 | } |
2343 | ||
2344 | ok: | |
2345 | /* If we have an old-style character declaration, and no new-style | |
2346 | attribute specifications, then there a comma is optional between | |
2347 | the type specification and the variable list. */ | |
2348 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
2349 | gfc_match_char (','); | |
2350 | ||
949d5b72 PT |
2351 | /* Give the types/attributes to symbols that follow. Give the element |
2352 | a number so that repeat character length expressions can be copied. */ | |
2353 | elem = 1; | |
6de9cd9a DN |
2354 | for (;;) |
2355 | { | |
949d5b72 | 2356 | m = variable_decl (elem++); |
6de9cd9a DN |
2357 | if (m == MATCH_ERROR) |
2358 | goto cleanup; | |
2359 | if (m == MATCH_NO) | |
2360 | break; | |
2361 | ||
2362 | if (gfc_match_eos () == MATCH_YES) | |
2363 | goto cleanup; | |
2364 | if (gfc_match_char (',') != MATCH_YES) | |
2365 | break; | |
2366 | } | |
2367 | ||
2368 | gfc_error ("Syntax error in data declaration at %C"); | |
2369 | m = MATCH_ERROR; | |
2370 | ||
2371 | cleanup: | |
2372 | gfc_free_array_spec (current_as); | |
2373 | current_as = NULL; | |
2374 | return m; | |
2375 | } | |
2376 | ||
2377 | ||
2378 | /* Match a prefix associated with a function or subroutine | |
2379 | declaration. If the typespec pointer is nonnull, then a typespec | |
2380 | can be matched. Note that if nothing matches, MATCH_YES is | |
2381 | returned (the null string was matched). */ | |
2382 | ||
2383 | static match | |
2384 | match_prefix (gfc_typespec * ts) | |
2385 | { | |
2386 | int seen_type; | |
2387 | ||
2388 | gfc_clear_attr (¤t_attr); | |
2389 | seen_type = 0; | |
2390 | ||
2391 | loop: | |
2392 | if (!seen_type && ts != NULL | |
e5ddaa24 | 2393 | && match_type_spec (ts, 0) == MATCH_YES |
6de9cd9a DN |
2394 | && gfc_match_space () == MATCH_YES) |
2395 | { | |
2396 | ||
2397 | seen_type = 1; | |
2398 | goto loop; | |
2399 | } | |
2400 | ||
2401 | if (gfc_match ("elemental% ") == MATCH_YES) | |
2402 | { | |
2403 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
2404 | return MATCH_ERROR; | |
2405 | ||
2406 | goto loop; | |
2407 | } | |
2408 | ||
2409 | if (gfc_match ("pure% ") == MATCH_YES) | |
2410 | { | |
2411 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
2412 | return MATCH_ERROR; | |
2413 | ||
2414 | goto loop; | |
2415 | } | |
2416 | ||
2417 | if (gfc_match ("recursive% ") == MATCH_YES) | |
2418 | { | |
2419 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
2420 | return MATCH_ERROR; | |
2421 | ||
2422 | goto loop; | |
2423 | } | |
2424 | ||
2425 | /* At this point, the next item is not a prefix. */ | |
2426 | return MATCH_YES; | |
2427 | } | |
2428 | ||
2429 | ||
2430 | /* Copy attributes matched by match_prefix() to attributes on a symbol. */ | |
2431 | ||
2432 | static try | |
2433 | copy_prefix (symbol_attribute * dest, locus * where) | |
2434 | { | |
2435 | ||
2436 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) | |
2437 | return FAILURE; | |
2438 | ||
2439 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
2440 | return FAILURE; | |
2441 | ||
2442 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
2443 | return FAILURE; | |
2444 | ||
2445 | return SUCCESS; | |
2446 | } | |
2447 | ||
2448 | ||
2449 | /* Match a formal argument list. */ | |
2450 | ||
2451 | match | |
2452 | gfc_match_formal_arglist (gfc_symbol * progname, int st_flag, int null_flag) | |
2453 | { | |
2454 | gfc_formal_arglist *head, *tail, *p, *q; | |
2455 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2456 | gfc_symbol *sym; | |
2457 | match m; | |
2458 | ||
2459 | head = tail = NULL; | |
2460 | ||
2461 | if (gfc_match_char ('(') != MATCH_YES) | |
2462 | { | |
2463 | if (null_flag) | |
2464 | goto ok; | |
2465 | return MATCH_NO; | |
2466 | } | |
2467 | ||
2468 | if (gfc_match_char (')') == MATCH_YES) | |
2469 | goto ok; | |
2470 | ||
2471 | for (;;) | |
2472 | { | |
2473 | if (gfc_match_char ('*') == MATCH_YES) | |
2474 | sym = NULL; | |
2475 | else | |
2476 | { | |
2477 | m = gfc_match_name (name); | |
2478 | if (m != MATCH_YES) | |
2479 | goto cleanup; | |
2480 | ||
2481 | if (gfc_get_symbol (name, NULL, &sym)) | |
2482 | goto cleanup; | |
2483 | } | |
2484 | ||
2485 | p = gfc_get_formal_arglist (); | |
2486 | ||
2487 | if (head == NULL) | |
2488 | head = tail = p; | |
2489 | else | |
2490 | { | |
2491 | tail->next = p; | |
2492 | tail = p; | |
2493 | } | |
2494 | ||
2495 | tail->sym = sym; | |
2496 | ||
2497 | /* We don't add the VARIABLE flavor because the name could be a | |
2498 | dummy procedure. We don't apply these attributes to formal | |
2499 | arguments of statement functions. */ | |
2500 | if (sym != NULL && !st_flag | |
231b2fcc | 2501 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
6de9cd9a DN |
2502 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
2503 | { | |
2504 | m = MATCH_ERROR; | |
2505 | goto cleanup; | |
2506 | } | |
2507 | ||
2508 | /* The name of a program unit can be in a different namespace, | |
2509 | so check for it explicitly. After the statement is accepted, | |
2510 | the name is checked for especially in gfc_get_symbol(). */ | |
2511 | if (gfc_new_block != NULL && sym != NULL | |
2512 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
2513 | { | |
2514 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
2515 | sym->name); | |
2516 | m = MATCH_ERROR; | |
2517 | goto cleanup; | |
2518 | } | |
2519 | ||
2520 | if (gfc_match_char (')') == MATCH_YES) | |
2521 | goto ok; | |
2522 | ||
2523 | m = gfc_match_char (','); | |
2524 | if (m != MATCH_YES) | |
2525 | { | |
2526 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
2527 | goto cleanup; | |
2528 | } | |
2529 | } | |
2530 | ||
2531 | ok: | |
2532 | /* Check for duplicate symbols in the formal argument list. */ | |
2533 | if (head != NULL) | |
2534 | { | |
2535 | for (p = head; p->next; p = p->next) | |
2536 | { | |
2537 | if (p->sym == NULL) | |
2538 | continue; | |
2539 | ||
2540 | for (q = p->next; q; q = q->next) | |
2541 | if (p->sym == q->sym) | |
2542 | { | |
2543 | gfc_error | |
2544 | ("Duplicate symbol '%s' in formal argument list at %C", | |
2545 | p->sym->name); | |
2546 | ||
2547 | m = MATCH_ERROR; | |
2548 | goto cleanup; | |
2549 | } | |
2550 | } | |
2551 | } | |
2552 | ||
2553 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) == | |
2554 | FAILURE) | |
2555 | { | |
2556 | m = MATCH_ERROR; | |
2557 | goto cleanup; | |
2558 | } | |
2559 | ||
2560 | return MATCH_YES; | |
2561 | ||
2562 | cleanup: | |
2563 | gfc_free_formal_arglist (head); | |
2564 | return m; | |
2565 | } | |
2566 | ||
2567 | ||
2568 | /* Match a RESULT specification following a function declaration or | |
2569 | ENTRY statement. Also matches the end-of-statement. */ | |
2570 | ||
2571 | static match | |
2572 | match_result (gfc_symbol * function, gfc_symbol ** result) | |
2573 | { | |
2574 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2575 | gfc_symbol *r; | |
2576 | match m; | |
2577 | ||
2578 | if (gfc_match (" result (") != MATCH_YES) | |
2579 | return MATCH_NO; | |
2580 | ||
2581 | m = gfc_match_name (name); | |
2582 | if (m != MATCH_YES) | |
2583 | return m; | |
2584 | ||
2585 | if (gfc_match (" )%t") != MATCH_YES) | |
2586 | { | |
2587 | gfc_error ("Unexpected junk following RESULT variable at %C"); | |
2588 | return MATCH_ERROR; | |
2589 | } | |
2590 | ||
2591 | if (strcmp (function->name, name) == 0) | |
2592 | { | |
2593 | gfc_error | |
2594 | ("RESULT variable at %C must be different than function name"); | |
2595 | return MATCH_ERROR; | |
2596 | } | |
2597 | ||
2598 | if (gfc_get_symbol (name, NULL, &r)) | |
2599 | return MATCH_ERROR; | |
2600 | ||
231b2fcc TS |
2601 | if (gfc_add_flavor (&r->attr, FL_VARIABLE, r->name, NULL) == FAILURE |
2602 | || gfc_add_result (&r->attr, r->name, NULL) == FAILURE) | |
6de9cd9a DN |
2603 | return MATCH_ERROR; |
2604 | ||
2605 | *result = r; | |
2606 | ||
2607 | return MATCH_YES; | |
2608 | } | |
2609 | ||
2610 | ||
2611 | /* Match a function declaration. */ | |
2612 | ||
2613 | match | |
2614 | gfc_match_function_decl (void) | |
2615 | { | |
2616 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2617 | gfc_symbol *sym, *result; | |
2618 | locus old_loc; | |
2619 | match m; | |
2620 | ||
2621 | if (gfc_current_state () != COMP_NONE | |
2622 | && gfc_current_state () != COMP_INTERFACE | |
2623 | && gfc_current_state () != COMP_CONTAINS) | |
2624 | return MATCH_NO; | |
2625 | ||
2626 | gfc_clear_ts (¤t_ts); | |
2627 | ||
63645982 | 2628 | old_loc = gfc_current_locus; |
6de9cd9a DN |
2629 | |
2630 | m = match_prefix (¤t_ts); | |
2631 | if (m != MATCH_YES) | |
2632 | { | |
63645982 | 2633 | gfc_current_locus = old_loc; |
6de9cd9a DN |
2634 | return m; |
2635 | } | |
2636 | ||
2637 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
2638 | { | |
63645982 | 2639 | gfc_current_locus = old_loc; |
6de9cd9a DN |
2640 | return MATCH_NO; |
2641 | } | |
2642 | ||
1a492601 | 2643 | if (get_proc_name (name, &sym, false)) |
6de9cd9a DN |
2644 | return MATCH_ERROR; |
2645 | gfc_new_block = sym; | |
2646 | ||
2647 | m = gfc_match_formal_arglist (sym, 0, 0); | |
2648 | if (m == MATCH_NO) | |
2b9a33ae TS |
2649 | { |
2650 | gfc_error ("Expected formal argument list in function " | |
2651 | "definition at %C"); | |
2652 | m = MATCH_ERROR; | |
2653 | goto cleanup; | |
2654 | } | |
6de9cd9a DN |
2655 | else if (m == MATCH_ERROR) |
2656 | goto cleanup; | |
2657 | ||
2658 | result = NULL; | |
2659 | ||
2660 | if (gfc_match_eos () != MATCH_YES) | |
2661 | { | |
2662 | /* See if a result variable is present. */ | |
2663 | m = match_result (sym, &result); | |
2664 | if (m == MATCH_NO) | |
2665 | gfc_error ("Unexpected junk after function declaration at %C"); | |
2666 | ||
2667 | if (m != MATCH_YES) | |
2668 | { | |
2669 | m = MATCH_ERROR; | |
2670 | goto cleanup; | |
2671 | } | |
2672 | } | |
2673 | ||
2674 | /* Make changes to the symbol. */ | |
2675 | m = MATCH_ERROR; | |
2676 | ||
231b2fcc | 2677 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
2678 | goto cleanup; |
2679 | ||
2680 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
2681 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
2682 | goto cleanup; | |
2683 | ||
982186b1 PT |
2684 | if (current_ts.type != BT_UNKNOWN |
2685 | && sym->ts.type != BT_UNKNOWN | |
2686 | && !sym->attr.implicit_type) | |
6de9cd9a DN |
2687 | { |
2688 | gfc_error ("Function '%s' at %C already has a type of %s", name, | |
2689 | gfc_basic_typename (sym->ts.type)); | |
2690 | goto cleanup; | |
2691 | } | |
2692 | ||
2693 | if (result == NULL) | |
2694 | { | |
2695 | sym->ts = current_ts; | |
2696 | sym->result = sym; | |
2697 | } | |
2698 | else | |
2699 | { | |
2700 | result->ts = current_ts; | |
2701 | sym->result = result; | |
2702 | } | |
2703 | ||
2704 | return MATCH_YES; | |
2705 | ||
2706 | cleanup: | |
63645982 | 2707 | gfc_current_locus = old_loc; |
6de9cd9a DN |
2708 | return m; |
2709 | } | |
2710 | ||
68ea355b PT |
2711 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to pass the |
2712 | name of the entry, rather than the gfc_current_block name, and to return false | |
2713 | upon finding an existing global entry. */ | |
2714 | ||
2715 | static bool | |
2716 | add_global_entry (const char * name, int sub) | |
2717 | { | |
2718 | gfc_gsymbol *s; | |
2719 | ||
2720 | s = gfc_get_gsymbol(name); | |
2721 | ||
2722 | if (s->defined | |
2723 | || (s->type != GSYM_UNKNOWN && s->type != (sub ? GSYM_SUBROUTINE : GSYM_FUNCTION))) | |
2724 | global_used(s, NULL); | |
2725 | else | |
2726 | { | |
2727 | s->type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; | |
2728 | s->where = gfc_current_locus; | |
2729 | s->defined = 1; | |
2730 | return true; | |
2731 | } | |
2732 | return false; | |
2733 | } | |
6de9cd9a DN |
2734 | |
2735 | /* Match an ENTRY statement. */ | |
2736 | ||
2737 | match | |
2738 | gfc_match_entry (void) | |
2739 | { | |
3d79abbd PB |
2740 | gfc_symbol *proc; |
2741 | gfc_symbol *result; | |
2742 | gfc_symbol *entry; | |
6de9cd9a DN |
2743 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
2744 | gfc_compile_state state; | |
2745 | match m; | |
3d79abbd | 2746 | gfc_entry_list *el; |
c96cfa49 | 2747 | locus old_loc; |
1a492601 | 2748 | bool module_procedure; |
6de9cd9a DN |
2749 | |
2750 | m = gfc_match_name (name); | |
2751 | if (m != MATCH_YES) | |
2752 | return m; | |
2753 | ||
3d79abbd | 2754 | state = gfc_current_state (); |
4c93c95a | 2755 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
3d79abbd | 2756 | { |
4c93c95a FXC |
2757 | switch (state) |
2758 | { | |
2759 | case COMP_PROGRAM: | |
2760 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
2761 | break; | |
2762 | case COMP_MODULE: | |
2763 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
2764 | break; | |
2765 | case COMP_BLOCK_DATA: | |
2766 | gfc_error | |
2767 | ("ENTRY statement at %C cannot appear within a BLOCK DATA"); | |
2768 | break; | |
2769 | case COMP_INTERFACE: | |
2770 | gfc_error | |
2771 | ("ENTRY statement at %C cannot appear within an INTERFACE"); | |
2772 | break; | |
2773 | case COMP_DERIVED: | |
2774 | gfc_error | |
2775 | ("ENTRY statement at %C cannot appear " | |
2776 | "within a DERIVED TYPE block"); | |
2777 | break; | |
2778 | case COMP_IF: | |
2779 | gfc_error | |
2780 | ("ENTRY statement at %C cannot appear within an IF-THEN block"); | |
2781 | break; | |
2782 | case COMP_DO: | |
2783 | gfc_error | |
2784 | ("ENTRY statement at %C cannot appear within a DO block"); | |
2785 | break; | |
2786 | case COMP_SELECT: | |
2787 | gfc_error | |
2788 | ("ENTRY statement at %C cannot appear within a SELECT block"); | |
2789 | break; | |
2790 | case COMP_FORALL: | |
2791 | gfc_error | |
2792 | ("ENTRY statement at %C cannot appear within a FORALL block"); | |
2793 | break; | |
2794 | case COMP_WHERE: | |
2795 | gfc_error | |
2796 | ("ENTRY statement at %C cannot appear within a WHERE block"); | |
2797 | break; | |
2798 | case COMP_CONTAINS: | |
2799 | gfc_error | |
2800 | ("ENTRY statement at %C cannot appear " | |
2801 | "within a contained subprogram"); | |
2802 | break; | |
2803 | default: | |
2804 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
2805 | } | |
3d79abbd PB |
2806 | return MATCH_ERROR; |
2807 | } | |
2808 | ||
1a492601 PT |
2809 | module_procedure = gfc_current_ns->parent != NULL |
2810 | && gfc_current_ns->parent->proc_name | |
2811 | && gfc_current_ns->parent->proc_name->attr.flavor == FL_MODULE; | |
2812 | ||
3d79abbd PB |
2813 | if (gfc_current_ns->parent != NULL |
2814 | && gfc_current_ns->parent->proc_name | |
1a492601 | 2815 | && !module_procedure) |
3d79abbd PB |
2816 | { |
2817 | gfc_error("ENTRY statement at %C cannot appear in a " | |
2818 | "contained procedure"); | |
2819 | return MATCH_ERROR; | |
2820 | } | |
2821 | ||
1a492601 PT |
2822 | /* Module function entries need special care in get_proc_name |
2823 | because previous references within the function will have | |
2824 | created symbols attached to the current namespace. */ | |
2825 | if (get_proc_name (name, &entry, | |
2826 | gfc_current_ns->parent != NULL | |
2827 | && module_procedure | |
2828 | && gfc_current_ns->proc_name->attr.function)) | |
6de9cd9a DN |
2829 | return MATCH_ERROR; |
2830 | ||
3d79abbd PB |
2831 | proc = gfc_current_block (); |
2832 | ||
2833 | if (state == COMP_SUBROUTINE) | |
6de9cd9a | 2834 | { |
231b2fcc | 2835 | /* An entry in a subroutine. */ |
68ea355b PT |
2836 | if (!add_global_entry (name, 1)) |
2837 | return MATCH_ERROR; | |
2838 | ||
6de9cd9a DN |
2839 | m = gfc_match_formal_arglist (entry, 0, 1); |
2840 | if (m != MATCH_YES) | |
2841 | return MATCH_ERROR; | |
2842 | ||
231b2fcc TS |
2843 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
2844 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a | 2845 | return MATCH_ERROR; |
3d79abbd PB |
2846 | } |
2847 | else | |
2848 | { | |
c96cfa49 TS |
2849 | /* An entry in a function. |
2850 | We need to take special care because writing | |
2851 | ENTRY f() | |
2852 | as | |
2853 | ENTRY f | |
2854 | is allowed, whereas | |
2855 | ENTRY f() RESULT (r) | |
2856 | can't be written as | |
2857 | ENTRY f RESULT (r). */ | |
68ea355b PT |
2858 | if (!add_global_entry (name, 0)) |
2859 | return MATCH_ERROR; | |
2860 | ||
c96cfa49 TS |
2861 | old_loc = gfc_current_locus; |
2862 | if (gfc_match_eos () == MATCH_YES) | |
2863 | { | |
2864 | gfc_current_locus = old_loc; | |
2865 | /* Match the empty argument list, and add the interface to | |
2866 | the symbol. */ | |
2867 | m = gfc_match_formal_arglist (entry, 0, 1); | |
2868 | } | |
2869 | else | |
2870 | m = gfc_match_formal_arglist (entry, 0, 0); | |
2871 | ||
6de9cd9a DN |
2872 | if (m != MATCH_YES) |
2873 | return MATCH_ERROR; | |
2874 | ||
6de9cd9a DN |
2875 | result = NULL; |
2876 | ||
2877 | if (gfc_match_eos () == MATCH_YES) | |
2878 | { | |
231b2fcc TS |
2879 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
2880 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a DN |
2881 | return MATCH_ERROR; |
2882 | ||
d198b59a | 2883 | entry->result = entry; |
6de9cd9a DN |
2884 | } |
2885 | else | |
2886 | { | |
3d79abbd | 2887 | m = match_result (proc, &result); |
6de9cd9a DN |
2888 | if (m == MATCH_NO) |
2889 | gfc_syntax_error (ST_ENTRY); | |
2890 | if (m != MATCH_YES) | |
2891 | return MATCH_ERROR; | |
2892 | ||
231b2fcc TS |
2893 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE |
2894 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
2895 | || gfc_add_function (&entry->attr, result->name, | |
2896 | NULL) == FAILURE) | |
6de9cd9a | 2897 | return MATCH_ERROR; |
d198b59a JJ |
2898 | |
2899 | entry->result = result; | |
6de9cd9a DN |
2900 | } |
2901 | ||
3d79abbd | 2902 | if (proc->attr.recursive && result == NULL) |
6de9cd9a DN |
2903 | { |
2904 | gfc_error ("RESULT attribute required in ENTRY statement at %C"); | |
2905 | return MATCH_ERROR; | |
2906 | } | |
6de9cd9a DN |
2907 | } |
2908 | ||
2909 | if (gfc_match_eos () != MATCH_YES) | |
2910 | { | |
2911 | gfc_syntax_error (ST_ENTRY); | |
2912 | return MATCH_ERROR; | |
2913 | } | |
2914 | ||
3d79abbd PB |
2915 | entry->attr.recursive = proc->attr.recursive; |
2916 | entry->attr.elemental = proc->attr.elemental; | |
2917 | entry->attr.pure = proc->attr.pure; | |
6de9cd9a | 2918 | |
3d79abbd PB |
2919 | el = gfc_get_entry_list (); |
2920 | el->sym = entry; | |
2921 | el->next = gfc_current_ns->entries; | |
2922 | gfc_current_ns->entries = el; | |
2923 | if (el->next) | |
2924 | el->id = el->next->id + 1; | |
2925 | else | |
2926 | el->id = 1; | |
6de9cd9a | 2927 | |
3d79abbd PB |
2928 | new_st.op = EXEC_ENTRY; |
2929 | new_st.ext.entry = el; | |
2930 | ||
2931 | return MATCH_YES; | |
6de9cd9a DN |
2932 | } |
2933 | ||
2934 | ||
2935 | /* Match a subroutine statement, including optional prefixes. */ | |
2936 | ||
2937 | match | |
2938 | gfc_match_subroutine (void) | |
2939 | { | |
2940 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2941 | gfc_symbol *sym; | |
2942 | match m; | |
2943 | ||
2944 | if (gfc_current_state () != COMP_NONE | |
2945 | && gfc_current_state () != COMP_INTERFACE | |
2946 | && gfc_current_state () != COMP_CONTAINS) | |
2947 | return MATCH_NO; | |
2948 | ||
2949 | m = match_prefix (NULL); | |
2950 | if (m != MATCH_YES) | |
2951 | return m; | |
2952 | ||
2953 | m = gfc_match ("subroutine% %n", name); | |
2954 | if (m != MATCH_YES) | |
2955 | return m; | |
2956 | ||
1a492601 | 2957 | if (get_proc_name (name, &sym, false)) |
6de9cd9a DN |
2958 | return MATCH_ERROR; |
2959 | gfc_new_block = sym; | |
2960 | ||
231b2fcc | 2961 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
2962 | return MATCH_ERROR; |
2963 | ||
2964 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
2965 | return MATCH_ERROR; | |
2966 | ||
2967 | if (gfc_match_eos () != MATCH_YES) | |
2968 | { | |
2969 | gfc_syntax_error (ST_SUBROUTINE); | |
2970 | return MATCH_ERROR; | |
2971 | } | |
2972 | ||
2973 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
2974 | return MATCH_ERROR; | |
2975 | ||
2976 | return MATCH_YES; | |
2977 | } | |
2978 | ||
2979 | ||
1f2959f0 | 2980 | /* Return nonzero if we're currently compiling a contained procedure. */ |
ddc9ce91 TS |
2981 | |
2982 | static int | |
2983 | contained_procedure (void) | |
2984 | { | |
2985 | gfc_state_data *s; | |
2986 | ||
2987 | for (s=gfc_state_stack; s; s=s->previous) | |
2988 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) | |
2989 | && s->previous != NULL | |
2990 | && s->previous->state == COMP_CONTAINS) | |
2991 | return 1; | |
2992 | ||
2993 | return 0; | |
2994 | } | |
2995 | ||
25d8f0a2 TS |
2996 | /* Set the kind of each enumerator. The kind is selected such that it is |
2997 | interoperable with the corresponding C enumeration type, making | |
2998 | sure that -fshort-enums is honored. */ | |
2999 | ||
3000 | static void | |
3001 | set_enum_kind(void) | |
3002 | { | |
3003 | enumerator_history *current_history = NULL; | |
3004 | int kind; | |
3005 | int i; | |
3006 | ||
3007 | if (max_enum == NULL || enum_history == NULL) | |
3008 | return; | |
3009 | ||
3010 | if (!gfc_option.fshort_enums) | |
3011 | return; | |
3012 | ||
3013 | i = 0; | |
3014 | do | |
3015 | { | |
3016 | kind = gfc_integer_kinds[i++].kind; | |
3017 | } | |
3018 | while (kind < gfc_c_int_kind | |
3019 | && gfc_check_integer_range (max_enum->initializer->value.integer, | |
3020 | kind) != ARITH_OK); | |
3021 | ||
3022 | current_history = enum_history; | |
3023 | while (current_history != NULL) | |
3024 | { | |
3025 | current_history->sym->ts.kind = kind; | |
3026 | current_history = current_history->next; | |
3027 | } | |
3028 | } | |
3029 | ||
6de9cd9a DN |
3030 | /* Match any of the various end-block statements. Returns the type of |
3031 | END to the caller. The END INTERFACE, END IF, END DO and END | |
3032 | SELECT statements cannot be replaced by a single END statement. */ | |
3033 | ||
3034 | match | |
3035 | gfc_match_end (gfc_statement * st) | |
3036 | { | |
3037 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3038 | gfc_compile_state state; | |
3039 | locus old_loc; | |
3040 | const char *block_name; | |
3041 | const char *target; | |
ddc9ce91 | 3042 | int eos_ok; |
6de9cd9a DN |
3043 | match m; |
3044 | ||
63645982 | 3045 | old_loc = gfc_current_locus; |
6de9cd9a DN |
3046 | if (gfc_match ("end") != MATCH_YES) |
3047 | return MATCH_NO; | |
3048 | ||
3049 | state = gfc_current_state (); | |
3050 | block_name = | |
3051 | gfc_current_block () == NULL ? NULL : gfc_current_block ()->name; | |
3052 | ||
3053 | if (state == COMP_CONTAINS) | |
3054 | { | |
3055 | state = gfc_state_stack->previous->state; | |
3056 | block_name = gfc_state_stack->previous->sym == NULL ? NULL | |
3057 | : gfc_state_stack->previous->sym->name; | |
3058 | } | |
3059 | ||
3060 | switch (state) | |
3061 | { | |
3062 | case COMP_NONE: | |
3063 | case COMP_PROGRAM: | |
3064 | *st = ST_END_PROGRAM; | |
3065 | target = " program"; | |
ddc9ce91 | 3066 | eos_ok = 1; |
6de9cd9a DN |
3067 | break; |
3068 | ||
3069 | case COMP_SUBROUTINE: | |
3070 | *st = ST_END_SUBROUTINE; | |
3071 | target = " subroutine"; | |
ddc9ce91 | 3072 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
3073 | break; |
3074 | ||
3075 | case COMP_FUNCTION: | |
3076 | *st = ST_END_FUNCTION; | |
3077 | target = " function"; | |
ddc9ce91 | 3078 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
3079 | break; |
3080 | ||
3081 | case COMP_BLOCK_DATA: | |
3082 | *st = ST_END_BLOCK_DATA; | |
3083 | target = " block data"; | |
ddc9ce91 | 3084 | eos_ok = 1; |
6de9cd9a DN |
3085 | break; |
3086 | ||
3087 | case COMP_MODULE: | |
3088 | *st = ST_END_MODULE; | |
3089 | target = " module"; | |
ddc9ce91 | 3090 | eos_ok = 1; |
6de9cd9a DN |
3091 | break; |
3092 | ||
3093 | case COMP_INTERFACE: | |
3094 | *st = ST_END_INTERFACE; | |
3095 | target = " interface"; | |
ddc9ce91 | 3096 | eos_ok = 0; |
6de9cd9a DN |
3097 | break; |
3098 | ||
3099 | case COMP_DERIVED: | |
3100 | *st = ST_END_TYPE; | |
3101 | target = " type"; | |
ddc9ce91 | 3102 | eos_ok = 0; |
6de9cd9a DN |
3103 | break; |
3104 | ||
3105 | case COMP_IF: | |
3106 | *st = ST_ENDIF; | |
3107 | target = " if"; | |
ddc9ce91 | 3108 | eos_ok = 0; |
6de9cd9a DN |
3109 | break; |
3110 | ||
3111 | case COMP_DO: | |
3112 | *st = ST_ENDDO; | |
3113 | target = " do"; | |
ddc9ce91 | 3114 | eos_ok = 0; |
6de9cd9a DN |
3115 | break; |
3116 | ||
3117 | case COMP_SELECT: | |
3118 | *st = ST_END_SELECT; | |
3119 | target = " select"; | |
ddc9ce91 | 3120 | eos_ok = 0; |
6de9cd9a DN |
3121 | break; |
3122 | ||
3123 | case COMP_FORALL: | |
3124 | *st = ST_END_FORALL; | |
3125 | target = " forall"; | |
ddc9ce91 | 3126 | eos_ok = 0; |
6de9cd9a DN |
3127 | break; |
3128 | ||
3129 | case COMP_WHERE: | |
3130 | *st = ST_END_WHERE; | |
3131 | target = " where"; | |
ddc9ce91 | 3132 | eos_ok = 0; |
6de9cd9a DN |
3133 | break; |
3134 | ||
25d8f0a2 TS |
3135 | case COMP_ENUM: |
3136 | *st = ST_END_ENUM; | |
3137 | target = " enum"; | |
3138 | eos_ok = 0; | |
3139 | last_initializer = NULL; | |
3140 | set_enum_kind (); | |
3141 | gfc_free_enum_history (); | |
3142 | break; | |
3143 | ||
6de9cd9a DN |
3144 | default: |
3145 | gfc_error ("Unexpected END statement at %C"); | |
3146 | goto cleanup; | |
3147 | } | |
3148 | ||
3149 | if (gfc_match_eos () == MATCH_YES) | |
3150 | { | |
ddc9ce91 | 3151 | if (!eos_ok) |
6de9cd9a | 3152 | { |
ddc9ce91 | 3153 | /* We would have required END [something] */ |
59ce85b5 TS |
3154 | gfc_error ("%s statement expected at %L", |
3155 | gfc_ascii_statement (*st), &old_loc); | |
6de9cd9a DN |
3156 | goto cleanup; |
3157 | } | |
3158 | ||
3159 | return MATCH_YES; | |
3160 | } | |
3161 | ||
3162 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
3163 | if (gfc_match (target) != MATCH_YES) | |
3164 | { | |
3165 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
3166 | goto cleanup; | |
3167 | } | |
3168 | ||
3169 | /* If we're at the end, make sure a block name wasn't required. */ | |
3170 | if (gfc_match_eos () == MATCH_YES) | |
3171 | { | |
3172 | ||
3173 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT) | |
3174 | return MATCH_YES; | |
3175 | ||
3176 | if (gfc_current_block () == NULL) | |
3177 | return MATCH_YES; | |
3178 | ||
3179 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
3180 | block_name, gfc_ascii_statement (*st)); | |
3181 | ||
3182 | return MATCH_ERROR; | |
3183 | } | |
3184 | ||
3185 | /* END INTERFACE has a special handler for its several possible endings. */ | |
3186 | if (*st == ST_END_INTERFACE) | |
3187 | return gfc_match_end_interface (); | |
3188 | ||
3189 | /* We haven't hit the end of statement, so what is left must be an end-name. */ | |
3190 | m = gfc_match_space (); | |
3191 | if (m == MATCH_YES) | |
3192 | m = gfc_match_name (name); | |
3193 | ||
3194 | if (m == MATCH_NO) | |
3195 | gfc_error ("Expected terminating name at %C"); | |
3196 | if (m != MATCH_YES) | |
3197 | goto cleanup; | |
3198 | ||
3199 | if (block_name == NULL) | |
3200 | goto syntax; | |
3201 | ||
3202 | if (strcmp (name, block_name) != 0) | |
3203 | { | |
3204 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
3205 | gfc_ascii_statement (*st)); | |
3206 | goto cleanup; | |
3207 | } | |
3208 | ||
3209 | if (gfc_match_eos () == MATCH_YES) | |
3210 | return MATCH_YES; | |
3211 | ||
3212 | syntax: | |
3213 | gfc_syntax_error (*st); | |
3214 | ||
3215 | cleanup: | |
63645982 | 3216 | gfc_current_locus = old_loc; |
6de9cd9a DN |
3217 | return MATCH_ERROR; |
3218 | } | |
3219 | ||
3220 | ||
3221 | ||
3222 | /***************** Attribute declaration statements ****************/ | |
3223 | ||
3224 | /* Set the attribute of a single variable. */ | |
3225 | ||
3226 | static match | |
3227 | attr_decl1 (void) | |
3228 | { | |
3229 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3230 | gfc_array_spec *as; | |
3231 | gfc_symbol *sym; | |
3232 | locus var_locus; | |
3233 | match m; | |
3234 | ||
3235 | as = NULL; | |
3236 | ||
3237 | m = gfc_match_name (name); | |
3238 | if (m != MATCH_YES) | |
3239 | goto cleanup; | |
3240 | ||
3241 | if (find_special (name, &sym)) | |
3242 | return MATCH_ERROR; | |
3243 | ||
63645982 | 3244 | var_locus = gfc_current_locus; |
6de9cd9a DN |
3245 | |
3246 | /* Deal with possible array specification for certain attributes. */ | |
3247 | if (current_attr.dimension | |
3248 | || current_attr.allocatable | |
3249 | || current_attr.pointer | |
3250 | || current_attr.target) | |
3251 | { | |
3252 | m = gfc_match_array_spec (&as); | |
3253 | if (m == MATCH_ERROR) | |
3254 | goto cleanup; | |
3255 | ||
3256 | if (current_attr.dimension && m == MATCH_NO) | |
3257 | { | |
3258 | gfc_error | |
3259 | ("Missing array specification at %L in DIMENSION statement", | |
3260 | &var_locus); | |
3261 | m = MATCH_ERROR; | |
3262 | goto cleanup; | |
3263 | } | |
3264 | ||
3265 | if ((current_attr.allocatable || current_attr.pointer) | |
3266 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
3267 | { | |
3268 | gfc_error ("Array specification must be deferred at %L", | |
3269 | &var_locus); | |
3270 | m = MATCH_ERROR; | |
3271 | goto cleanup; | |
3272 | } | |
3273 | } | |
3274 | ||
3275 | /* Update symbol table. DIMENSION attribute is set in gfc_set_array_spec(). */ | |
3276 | if (current_attr.dimension == 0 | |
3277 | && gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
3278 | { | |
3279 | m = MATCH_ERROR; | |
3280 | goto cleanup; | |
3281 | } | |
3282 | ||
3283 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
3284 | { | |
3285 | m = MATCH_ERROR; | |
3286 | goto cleanup; | |
3287 | } | |
83d890b9 AL |
3288 | |
3289 | if (sym->attr.cray_pointee && sym->as != NULL) | |
3290 | { | |
3291 | /* Fix the array spec. */ | |
3292 | m = gfc_mod_pointee_as (sym->as); | |
3293 | if (m == MATCH_ERROR) | |
3294 | goto cleanup; | |
3295 | } | |
6de9cd9a | 3296 | |
cda7004b | 3297 | if (gfc_add_attribute (&sym->attr, &var_locus, current_attr.intent) == FAILURE) |
1902704e PT |
3298 | { |
3299 | m = MATCH_ERROR; | |
3300 | goto cleanup; | |
3301 | } | |
3302 | ||
6de9cd9a DN |
3303 | if ((current_attr.external || current_attr.intrinsic) |
3304 | && sym->attr.flavor != FL_PROCEDURE | |
231b2fcc | 3305 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
3306 | { |
3307 | m = MATCH_ERROR; | |
3308 | goto cleanup; | |
3309 | } | |
3310 | ||
3311 | return MATCH_YES; | |
3312 | ||
3313 | cleanup: | |
3314 | gfc_free_array_spec (as); | |
3315 | return m; | |
3316 | } | |
3317 | ||
3318 | ||
3319 | /* Generic attribute declaration subroutine. Used for attributes that | |
3320 | just have a list of names. */ | |
3321 | ||
3322 | static match | |
3323 | attr_decl (void) | |
3324 | { | |
3325 | match m; | |
3326 | ||
3327 | /* Gobble the optional double colon, by simply ignoring the result | |
3328 | of gfc_match(). */ | |
3329 | gfc_match (" ::"); | |
3330 | ||
3331 | for (;;) | |
3332 | { | |
3333 | m = attr_decl1 (); | |
3334 | if (m != MATCH_YES) | |
3335 | break; | |
3336 | ||
3337 | if (gfc_match_eos () == MATCH_YES) | |
3338 | { | |
3339 | m = MATCH_YES; | |
3340 | break; | |
3341 | } | |
3342 | ||
3343 | if (gfc_match_char (',') != MATCH_YES) | |
3344 | { | |
3345 | gfc_error ("Unexpected character in variable list at %C"); | |
3346 | m = MATCH_ERROR; | |
3347 | break; | |
3348 | } | |
3349 | } | |
3350 | ||
3351 | return m; | |
3352 | } | |
3353 | ||
3354 | ||
83d890b9 AL |
3355 | /* This routine matches Cray Pointer declarations of the form: |
3356 | pointer ( <pointer>, <pointee> ) | |
3357 | or | |
3358 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... | |
3359 | The pointer, if already declared, should be an integer. Otherwise, we | |
3360 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may | |
3361 | be either a scalar, or an array declaration. No space is allocated for | |
3362 | the pointee. For the statement | |
3363 | pointer (ipt, ar(10)) | |
3364 | any subsequent uses of ar will be translated (in C-notation) as | |
3365 | ar(i) => ((<type> *) ipt)(i) | |
b122dc6a | 3366 | After gimplification, pointee variable will disappear in the code. */ |
83d890b9 AL |
3367 | |
3368 | static match | |
3369 | cray_pointer_decl (void) | |
3370 | { | |
3371 | match m; | |
3372 | gfc_array_spec *as; | |
3373 | gfc_symbol *cptr; /* Pointer symbol. */ | |
3374 | gfc_symbol *cpte; /* Pointee symbol. */ | |
3375 | locus var_locus; | |
3376 | bool done = false; | |
3377 | ||
3378 | while (!done) | |
3379 | { | |
3380 | if (gfc_match_char ('(') != MATCH_YES) | |
3381 | { | |
3382 | gfc_error ("Expected '(' at %C"); | |
3383 | return MATCH_ERROR; | |
3384 | } | |
3385 | ||
3386 | /* Match pointer. */ | |
3387 | var_locus = gfc_current_locus; | |
3388 | gfc_clear_attr (¤t_attr); | |
3389 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
3390 | current_ts.type = BT_INTEGER; | |
3391 | current_ts.kind = gfc_index_integer_kind; | |
3392 | ||
3393 | m = gfc_match_symbol (&cptr, 0); | |
3394 | if (m != MATCH_YES) | |
3395 | { | |
3396 | gfc_error ("Expected variable name at %C"); | |
3397 | return m; | |
3398 | } | |
3399 | ||
3400 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) | |
3401 | return MATCH_ERROR; | |
3402 | ||
3403 | gfc_set_sym_referenced (cptr); | |
3404 | ||
3405 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
3406 | { | |
3407 | cptr->ts.type = BT_INTEGER; | |
3408 | cptr->ts.kind = gfc_index_integer_kind; | |
3409 | } | |
3410 | else if (cptr->ts.type != BT_INTEGER) | |
3411 | { | |
3412 | gfc_error ("Cray pointer at %C must be an integer."); | |
3413 | return MATCH_ERROR; | |
3414 | } | |
3415 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
3416 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
3417 | " memory addresses require %d bytes.", | |
3418 | cptr->ts.kind, | |
3419 | gfc_index_integer_kind); | |
3420 | ||
3421 | if (gfc_match_char (',') != MATCH_YES) | |
3422 | { | |
3423 | gfc_error ("Expected \",\" at %C"); | |
3424 | return MATCH_ERROR; | |
3425 | } | |
3426 | ||
3427 | /* Match Pointee. */ | |
3428 | var_locus = gfc_current_locus; | |
3429 | gfc_clear_attr (¤t_attr); | |
3430 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
3431 | current_ts.type = BT_UNKNOWN; | |
3432 | current_ts.kind = 0; | |
3433 | ||
3434 | m = gfc_match_symbol (&cpte, 0); | |
3435 | if (m != MATCH_YES) | |
3436 | { | |
3437 | gfc_error ("Expected variable name at %C"); | |
3438 | return m; | |
3439 | } | |
3440 | ||
3441 | /* Check for an optional array spec. */ | |
3442 | m = gfc_match_array_spec (&as); | |
3443 | if (m == MATCH_ERROR) | |
3444 | { | |
3445 | gfc_free_array_spec (as); | |
3446 | return m; | |
3447 | } | |
3448 | else if (m == MATCH_NO) | |
3449 | { | |
3450 | gfc_free_array_spec (as); | |
3451 | as = NULL; | |
3452 | } | |
3453 | ||
3454 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
3455 | return MATCH_ERROR; | |
3456 | ||
3457 | gfc_set_sym_referenced (cpte); | |
3458 | ||
3459 | if (cpte->as == NULL) | |
3460 | { | |
3461 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
3462 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
3463 | } | |
3464 | else if (as != NULL) | |
3465 | { | |
3466 | gfc_error ("Duplicate array spec for Cray pointee at %C."); | |
3467 | gfc_free_array_spec (as); | |
3468 | return MATCH_ERROR; | |
3469 | } | |
3470 | ||
3471 | as = NULL; | |
3472 | ||
3473 | if (cpte->as != NULL) | |
3474 | { | |
3475 | /* Fix array spec. */ | |
3476 | m = gfc_mod_pointee_as (cpte->as); | |
3477 | if (m == MATCH_ERROR) | |
3478 | return m; | |
3479 | } | |
3480 | ||
3481 | /* Point the Pointee at the Pointer. */ | |
b122dc6a | 3482 | cpte->cp_pointer = cptr; |
83d890b9 AL |
3483 | |
3484 | if (gfc_match_char (')') != MATCH_YES) | |
3485 | { | |
3486 | gfc_error ("Expected \")\" at %C"); | |
3487 | return MATCH_ERROR; | |
3488 | } | |
3489 | m = gfc_match_char (','); | |
3490 | if (m != MATCH_YES) | |
3491 | done = true; /* Stop searching for more declarations. */ | |
3492 | ||
3493 | } | |
3494 | ||
3495 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
3496 | || gfc_match_eos () != MATCH_YES) | |
3497 | { | |
3498 | gfc_error ("Expected \",\" or end of statement at %C"); | |
3499 | return MATCH_ERROR; | |
3500 | } | |
3501 | return MATCH_YES; | |
3502 | } | |
3503 | ||
3504 | ||
6de9cd9a DN |
3505 | match |
3506 | gfc_match_external (void) | |
3507 | { | |
3508 | ||
3509 | gfc_clear_attr (¤t_attr); | |
1902704e | 3510 | current_attr.external = 1; |
6de9cd9a DN |
3511 | |
3512 | return attr_decl (); | |
3513 | } | |
3514 | ||
3515 | ||
3516 | ||
3517 | match | |
3518 | gfc_match_intent (void) | |
3519 | { | |
3520 | sym_intent intent; | |
3521 | ||
3522 | intent = match_intent_spec (); | |
3523 | if (intent == INTENT_UNKNOWN) | |
3524 | return MATCH_ERROR; | |
3525 | ||
3526 | gfc_clear_attr (¤t_attr); | |
1902704e | 3527 | current_attr.intent = intent; |
6de9cd9a DN |
3528 | |
3529 | return attr_decl (); | |
3530 | } | |
3531 | ||
3532 | ||
3533 | match | |
3534 | gfc_match_intrinsic (void) | |
3535 | { | |
3536 | ||
3537 | gfc_clear_attr (¤t_attr); | |
1902704e | 3538 | current_attr.intrinsic = 1; |
6de9cd9a DN |
3539 | |
3540 | return attr_decl (); | |
3541 | } | |
3542 | ||
3543 | ||
3544 | match | |
3545 | gfc_match_optional (void) | |
3546 | { | |
3547 | ||
3548 | gfc_clear_attr (¤t_attr); | |
1902704e | 3549 | current_attr.optional = 1; |
6de9cd9a DN |
3550 | |
3551 | return attr_decl (); | |
3552 | } | |
3553 | ||
3554 | ||
3555 | match | |
3556 | gfc_match_pointer (void) | |
3557 | { | |
83d890b9 AL |
3558 | gfc_gobble_whitespace (); |
3559 | if (gfc_peek_char () == '(') | |
3560 | { | |
3561 | if (!gfc_option.flag_cray_pointer) | |
3562 | { | |
3563 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer" | |
3564 | " flag."); | |
3565 | return MATCH_ERROR; | |
3566 | } | |
3567 | return cray_pointer_decl (); | |
3568 | } | |
3569 | else | |
3570 | { | |
3571 | gfc_clear_attr (¤t_attr); | |
1902704e | 3572 | current_attr.pointer = 1; |
83d890b9 AL |
3573 | |
3574 | return attr_decl (); | |
3575 | } | |
6de9cd9a DN |
3576 | } |
3577 | ||
3578 | ||
3579 | match | |
3580 | gfc_match_allocatable (void) | |
3581 | { | |
3582 | ||
3583 | gfc_clear_attr (¤t_attr); | |
1902704e | 3584 | current_attr.allocatable = 1; |
6de9cd9a DN |
3585 | |
3586 | return attr_decl (); | |
3587 | } | |
3588 | ||
3589 | ||
3590 | match | |
3591 | gfc_match_dimension (void) | |
3592 | { | |
3593 | ||
3594 | gfc_clear_attr (¤t_attr); | |
1902704e | 3595 | current_attr.dimension = 1; |
6de9cd9a DN |
3596 | |
3597 | return attr_decl (); | |
3598 | } | |
3599 | ||
3600 | ||
3601 | match | |
3602 | gfc_match_target (void) | |
3603 | { | |
3604 | ||
3605 | gfc_clear_attr (¤t_attr); | |
1902704e | 3606 | current_attr.target = 1; |
6de9cd9a DN |
3607 | |
3608 | return attr_decl (); | |
3609 | } | |
3610 | ||
3611 | ||
3612 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
3613 | statement. */ | |
3614 | ||
3615 | static match | |
3616 | access_attr_decl (gfc_statement st) | |
3617 | { | |
3618 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3619 | interface_type type; | |
3620 | gfc_user_op *uop; | |
3621 | gfc_symbol *sym; | |
3622 | gfc_intrinsic_op operator; | |
3623 | match m; | |
3624 | ||
3625 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
3626 | goto done; | |
3627 | ||
3628 | for (;;) | |
3629 | { | |
3630 | m = gfc_match_generic_spec (&type, name, &operator); | |
3631 | if (m == MATCH_NO) | |
3632 | goto syntax; | |
3633 | if (m == MATCH_ERROR) | |
3634 | return MATCH_ERROR; | |
3635 | ||
3636 | switch (type) | |
3637 | { | |
3638 | case INTERFACE_NAMELESS: | |
3639 | goto syntax; | |
3640 | ||
3641 | case INTERFACE_GENERIC: | |
3642 | if (gfc_get_symbol (name, NULL, &sym)) | |
3643 | goto done; | |
3644 | ||
3645 | if (gfc_add_access (&sym->attr, | |
3646 | (st == | |
3647 | ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
231b2fcc | 3648 | sym->name, NULL) == FAILURE) |
6de9cd9a DN |
3649 | return MATCH_ERROR; |
3650 | ||
3651 | break; | |
3652 | ||
3653 | case INTERFACE_INTRINSIC_OP: | |
3654 | if (gfc_current_ns->operator_access[operator] == ACCESS_UNKNOWN) | |
3655 | { | |
3656 | gfc_current_ns->operator_access[operator] = | |
3657 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
3658 | } | |
3659 | else | |
3660 | { | |
3661 | gfc_error ("Access specification of the %s operator at %C has " | |
3662 | "already been specified", gfc_op2string (operator)); | |
3663 | goto done; | |
3664 | } | |
3665 | ||
3666 | break; | |
3667 | ||
3668 | case INTERFACE_USER_OP: | |
3669 | uop = gfc_get_uop (name); | |
3670 | ||
3671 | if (uop->access == ACCESS_UNKNOWN) | |
3672 | { | |
3673 | uop->access = | |
3674 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
3675 | } | |
3676 | else | |
3677 | { | |
3678 | gfc_error | |
3679 | ("Access specification of the .%s. operator at %C has " | |
3680 | "already been specified", sym->name); | |
3681 | goto done; | |
3682 | } | |
3683 | ||
3684 | break; | |
3685 | } | |
3686 | ||
3687 | if (gfc_match_char (',') == MATCH_NO) | |
3688 | break; | |
3689 | } | |
3690 | ||
3691 | if (gfc_match_eos () != MATCH_YES) | |
3692 | goto syntax; | |
3693 | return MATCH_YES; | |
3694 | ||
3695 | syntax: | |
3696 | gfc_syntax_error (st); | |
3697 | ||
3698 | done: | |
3699 | return MATCH_ERROR; | |
3700 | } | |
3701 | ||
3702 | ||
3703 | /* The PRIVATE statement is a bit weird in that it can be a attribute | |
3704 | declaration, but also works as a standlone statement inside of a | |
3705 | type declaration or a module. */ | |
3706 | ||
3707 | match | |
3708 | gfc_match_private (gfc_statement * st) | |
3709 | { | |
3710 | ||
3711 | if (gfc_match ("private") != MATCH_YES) | |
3712 | return MATCH_NO; | |
3713 | ||
3714 | if (gfc_current_state () == COMP_DERIVED) | |
3715 | { | |
3716 | if (gfc_match_eos () == MATCH_YES) | |
3717 | { | |
3718 | *st = ST_PRIVATE; | |
3719 | return MATCH_YES; | |
3720 | } | |
3721 | ||
3722 | gfc_syntax_error (ST_PRIVATE); | |
3723 | return MATCH_ERROR; | |
3724 | } | |
3725 | ||
3726 | if (gfc_match_eos () == MATCH_YES) | |
3727 | { | |
3728 | *st = ST_PRIVATE; | |
3729 | return MATCH_YES; | |
3730 | } | |
3731 | ||
3732 | *st = ST_ATTR_DECL; | |
3733 | return access_attr_decl (ST_PRIVATE); | |
3734 | } | |
3735 | ||
3736 | ||
3737 | match | |
3738 | gfc_match_public (gfc_statement * st) | |
3739 | { | |
3740 | ||
3741 | if (gfc_match ("public") != MATCH_YES) | |
3742 | return MATCH_NO; | |
3743 | ||
3744 | if (gfc_match_eos () == MATCH_YES) | |
3745 | { | |
3746 | *st = ST_PUBLIC; | |
3747 | return MATCH_YES; | |
3748 | } | |
3749 | ||
3750 | *st = ST_ATTR_DECL; | |
3751 | return access_attr_decl (ST_PUBLIC); | |
3752 | } | |
3753 | ||
3754 | ||
3755 | /* Workhorse for gfc_match_parameter. */ | |
3756 | ||
3757 | static match | |
3758 | do_parm (void) | |
3759 | { | |
3760 | gfc_symbol *sym; | |
3761 | gfc_expr *init; | |
3762 | match m; | |
3763 | ||
3764 | m = gfc_match_symbol (&sym, 0); | |
3765 | if (m == MATCH_NO) | |
3766 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
3767 | ||
3768 | if (m != MATCH_YES) | |
3769 | return m; | |
3770 | ||
3771 | if (gfc_match_char ('=') == MATCH_NO) | |
3772 | { | |
3773 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
3774 | return MATCH_ERROR; | |
3775 | } | |
3776 | ||
3777 | m = gfc_match_init_expr (&init); | |
3778 | if (m == MATCH_NO) | |
3779 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
3780 | if (m != MATCH_YES) | |
3781 | return m; | |
3782 | ||
3783 | if (sym->ts.type == BT_UNKNOWN | |
3784 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
3785 | { | |
3786 | m = MATCH_ERROR; | |
3787 | goto cleanup; | |
3788 | } | |
3789 | ||
3790 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
231b2fcc | 3791 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
3792 | { |
3793 | m = MATCH_ERROR; | |
3794 | goto cleanup; | |
3795 | } | |
3796 | ||
7e2eba4b DE |
3797 | if (sym->ts.type == BT_CHARACTER |
3798 | && sym->ts.cl != NULL | |
3799 | && sym->ts.cl->length != NULL | |
3800 | && sym->ts.cl->length->expr_type == EXPR_CONSTANT | |
3801 | && init->expr_type == EXPR_CONSTANT | |
3802 | && init->ts.type == BT_CHARACTER | |
3803 | && init->ts.kind == 1) | |
3804 | gfc_set_constant_character_len ( | |
3805 | mpz_get_si (sym->ts.cl->length->value.integer), init); | |
3806 | ||
6de9cd9a DN |
3807 | sym->value = init; |
3808 | return MATCH_YES; | |
3809 | ||
3810 | cleanup: | |
3811 | gfc_free_expr (init); | |
3812 | return m; | |
3813 | } | |
3814 | ||
3815 | ||
3816 | /* Match a parameter statement, with the weird syntax that these have. */ | |
3817 | ||
3818 | match | |
3819 | gfc_match_parameter (void) | |
3820 | { | |
3821 | match m; | |
3822 | ||
3823 | if (gfc_match_char ('(') == MATCH_NO) | |
3824 | return MATCH_NO; | |
3825 | ||
3826 | for (;;) | |
3827 | { | |
3828 | m = do_parm (); | |
3829 | if (m != MATCH_YES) | |
3830 | break; | |
3831 | ||
3832 | if (gfc_match (" )%t") == MATCH_YES) | |
3833 | break; | |
3834 | ||
3835 | if (gfc_match_char (',') != MATCH_YES) | |
3836 | { | |
3837 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
3838 | m = MATCH_ERROR; | |
3839 | break; | |
3840 | } | |
3841 | } | |
3842 | ||
3843 | return m; | |
3844 | } | |
3845 | ||
3846 | ||
3847 | /* Save statements have a special syntax. */ | |
3848 | ||
3849 | match | |
3850 | gfc_match_save (void) | |
3851 | { | |
9056bd70 TS |
3852 | char n[GFC_MAX_SYMBOL_LEN+1]; |
3853 | gfc_common_head *c; | |
6de9cd9a DN |
3854 | gfc_symbol *sym; |
3855 | match m; | |
3856 | ||
3857 | if (gfc_match_eos () == MATCH_YES) | |
3858 | { | |
3859 | if (gfc_current_ns->seen_save) | |
3860 | { | |
09e87839 AL |
3861 | if (gfc_notify_std (GFC_STD_LEGACY, |
3862 | "Blanket SAVE statement at %C follows previous " | |
3863 | "SAVE statement") | |
3864 | == FAILURE) | |
3865 | return MATCH_ERROR; | |
6de9cd9a DN |
3866 | } |
3867 | ||
3868 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
3869 | return MATCH_YES; | |
3870 | } | |
3871 | ||
3872 | if (gfc_current_ns->save_all) | |
3873 | { | |
09e87839 AL |
3874 | if (gfc_notify_std (GFC_STD_LEGACY, |
3875 | "SAVE statement at %C follows blanket SAVE statement") | |
3876 | == FAILURE) | |
3877 | return MATCH_ERROR; | |
6de9cd9a DN |
3878 | } |
3879 | ||
3880 | gfc_match (" ::"); | |
3881 | ||
3882 | for (;;) | |
3883 | { | |
3884 | m = gfc_match_symbol (&sym, 0); | |
3885 | switch (m) | |
3886 | { | |
3887 | case MATCH_YES: | |
231b2fcc TS |
3888 | if (gfc_add_save (&sym->attr, sym->name, |
3889 | &gfc_current_locus) == FAILURE) | |
6de9cd9a DN |
3890 | return MATCH_ERROR; |
3891 | goto next_item; | |
3892 | ||
3893 | case MATCH_NO: | |
3894 | break; | |
3895 | ||
3896 | case MATCH_ERROR: | |
3897 | return MATCH_ERROR; | |
3898 | } | |
3899 | ||
9056bd70 | 3900 | m = gfc_match (" / %n /", &n); |
6de9cd9a DN |
3901 | if (m == MATCH_ERROR) |
3902 | return MATCH_ERROR; | |
3903 | if (m == MATCH_NO) | |
3904 | goto syntax; | |
3905 | ||
53814b8f | 3906 | c = gfc_get_common (n, 0); |
9056bd70 TS |
3907 | c->saved = 1; |
3908 | ||
6de9cd9a DN |
3909 | gfc_current_ns->seen_save = 1; |
3910 | ||
3911 | next_item: | |
3912 | if (gfc_match_eos () == MATCH_YES) | |
3913 | break; | |
3914 | if (gfc_match_char (',') != MATCH_YES) | |
3915 | goto syntax; | |
3916 | } | |
3917 | ||
3918 | return MATCH_YES; | |
3919 | ||
3920 | syntax: | |
3921 | gfc_error ("Syntax error in SAVE statement at %C"); | |
3922 | return MATCH_ERROR; | |
3923 | } | |
3924 | ||
3925 | ||
3926 | /* Match a module procedure statement. Note that we have to modify | |
3927 | symbols in the parent's namespace because the current one was there | |
49de9e73 | 3928 | to receive symbols that are in an interface's formal argument list. */ |
6de9cd9a DN |
3929 | |
3930 | match | |
3931 | gfc_match_modproc (void) | |
3932 | { | |
3933 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3934 | gfc_symbol *sym; | |
3935 | match m; | |
3936 | ||
3937 | if (gfc_state_stack->state != COMP_INTERFACE | |
3938 | || gfc_state_stack->previous == NULL | |
3939 | || current_interface.type == INTERFACE_NAMELESS) | |
3940 | { | |
3941 | gfc_error | |
3942 | ("MODULE PROCEDURE at %C must be in a generic module interface"); | |
3943 | return MATCH_ERROR; | |
3944 | } | |
3945 | ||
3946 | for (;;) | |
3947 | { | |
3948 | m = gfc_match_name (name); | |
3949 | if (m == MATCH_NO) | |
3950 | goto syntax; | |
3951 | if (m != MATCH_YES) | |
3952 | return MATCH_ERROR; | |
3953 | ||
3954 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
3955 | return MATCH_ERROR; | |
3956 | ||
3957 | if (sym->attr.proc != PROC_MODULE | |
231b2fcc TS |
3958 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
3959 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
3960 | return MATCH_ERROR; |
3961 | ||
3962 | if (gfc_add_interface (sym) == FAILURE) | |
3963 | return MATCH_ERROR; | |
3964 | ||
3965 | if (gfc_match_eos () == MATCH_YES) | |
3966 | break; | |
3967 | if (gfc_match_char (',') != MATCH_YES) | |
3968 | goto syntax; | |
3969 | } | |
3970 | ||
3971 | return MATCH_YES; | |
3972 | ||
3973 | syntax: | |
3974 | gfc_syntax_error (ST_MODULE_PROC); | |
3975 | return MATCH_ERROR; | |
3976 | } | |
3977 | ||
3978 | ||
3979 | /* Match the beginning of a derived type declaration. If a type name | |
3980 | was the result of a function, then it is possible to have a symbol | |
3981 | already to be known as a derived type yet have no components. */ | |
3982 | ||
3983 | match | |
3984 | gfc_match_derived_decl (void) | |
3985 | { | |
3986 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3987 | symbol_attribute attr; | |
3988 | gfc_symbol *sym; | |
3989 | match m; | |
3990 | ||
3991 | if (gfc_current_state () == COMP_DERIVED) | |
3992 | return MATCH_NO; | |
3993 | ||
3994 | gfc_clear_attr (&attr); | |
3995 | ||
3996 | loop: | |
3997 | if (gfc_match (" , private") == MATCH_YES) | |
3998 | { | |
3999 | if (gfc_find_state (COMP_MODULE) == FAILURE) | |
4000 | { | |
4001 | gfc_error | |
4002 | ("Derived type at %C can only be PRIVATE within a MODULE"); | |
4003 | return MATCH_ERROR; | |
4004 | } | |
4005 | ||
231b2fcc | 4006 | if (gfc_add_access (&attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
6de9cd9a DN |
4007 | return MATCH_ERROR; |
4008 | goto loop; | |
4009 | } | |
4010 | ||
4011 | if (gfc_match (" , public") == MATCH_YES) | |
4012 | { | |
4013 | if (gfc_find_state (COMP_MODULE) == FAILURE) | |
4014 | { | |
4015 | gfc_error ("Derived type at %C can only be PUBLIC within a MODULE"); | |
4016 | return MATCH_ERROR; | |
4017 | } | |
4018 | ||
231b2fcc | 4019 | if (gfc_add_access (&attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
6de9cd9a DN |
4020 | return MATCH_ERROR; |
4021 | goto loop; | |
4022 | } | |
4023 | ||
4024 | if (gfc_match (" ::") != MATCH_YES && attr.access != ACCESS_UNKNOWN) | |
4025 | { | |
4026 | gfc_error ("Expected :: in TYPE definition at %C"); | |
4027 | return MATCH_ERROR; | |
4028 | } | |
4029 | ||
4030 | m = gfc_match (" %n%t", name); | |
4031 | if (m != MATCH_YES) | |
4032 | return m; | |
4033 | ||
4034 | /* Make sure the name isn't the name of an intrinsic type. The | |
4035 | 'double precision' type doesn't get past the name matcher. */ | |
4036 | if (strcmp (name, "integer") == 0 | |
4037 | || strcmp (name, "real") == 0 | |
4038 | || strcmp (name, "character") == 0 | |
4039 | || strcmp (name, "logical") == 0 | |
4040 | || strcmp (name, "complex") == 0) | |
4041 | { | |
4042 | gfc_error | |
4043 | ("Type name '%s' at %C cannot be the same as an intrinsic type", | |
4044 | name); | |
4045 | return MATCH_ERROR; | |
4046 | } | |
4047 | ||
4048 | if (gfc_get_symbol (name, NULL, &sym)) | |
4049 | return MATCH_ERROR; | |
4050 | ||
4051 | if (sym->ts.type != BT_UNKNOWN) | |
4052 | { | |
4053 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
4054 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
4055 | return MATCH_ERROR; | |
4056 | } | |
4057 | ||
4058 | /* The symbol may already have the derived attribute without the | |
4059 | components. The ways this can happen is via a function | |
4060 | definition, an INTRINSIC statement or a subtype in another | |
4061 | derived type that is a pointer. The first part of the AND clause | |
f7b529fa | 4062 | is true if a the symbol is not the return value of a function. */ |
6de9cd9a | 4063 | if (sym->attr.flavor != FL_DERIVED |
231b2fcc | 4064 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
4065 | return MATCH_ERROR; |
4066 | ||
4067 | if (sym->components != NULL) | |
4068 | { | |
4069 | gfc_error | |
4070 | ("Derived type definition of '%s' at %C has already been defined", | |
4071 | sym->name); | |
4072 | return MATCH_ERROR; | |
4073 | } | |
4074 | ||
4075 | if (attr.access != ACCESS_UNKNOWN | |
231b2fcc | 4076 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
4077 | return MATCH_ERROR; |
4078 | ||
4079 | gfc_new_block = sym; | |
4080 | ||
4081 | return MATCH_YES; | |
4082 | } | |
83d890b9 AL |
4083 | |
4084 | ||
4085 | /* Cray Pointees can be declared as: | |
4086 | pointer (ipt, a (n,m,...,*)) | |
4087 | By default, this is treated as an AS_ASSUMED_SIZE array. We'll | |
4088 | cheat and set a constant bound of 1 for the last dimension, if this | |
4089 | is the case. Since there is no bounds-checking for Cray Pointees, | |
4090 | this will be okay. */ | |
4091 | ||
4092 | try | |
4093 | gfc_mod_pointee_as (gfc_array_spec *as) | |
4094 | { | |
4095 | as->cray_pointee = true; /* This will be useful to know later. */ | |
4096 | if (as->type == AS_ASSUMED_SIZE) | |
4097 | { | |
4098 | as->type = AS_EXPLICIT; | |
4099 | as->upper[as->rank - 1] = gfc_int_expr (1); | |
4100 | as->cp_was_assumed = true; | |
4101 | } | |
4102 | else if (as->type == AS_ASSUMED_SHAPE) | |
4103 | { | |
4104 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
4105 | return MATCH_ERROR; | |
4106 | } | |
4107 | return MATCH_YES; | |
4108 | } | |
25d8f0a2 TS |
4109 | |
4110 | ||
4111 | /* Match the enum definition statement, here we are trying to match | |
4112 | the first line of enum definition statement. | |
4113 | Returns MATCH_YES if match is found. */ | |
4114 | ||
4115 | match | |
4116 | gfc_match_enum (void) | |
4117 | { | |
4118 | match m; | |
4119 | ||
4120 | m = gfc_match_eos (); | |
4121 | if (m != MATCH_YES) | |
4122 | return m; | |
4123 | ||
4124 | if (gfc_notify_std (GFC_STD_F2003, | |
4125 | "New in Fortran 2003: ENUM AND ENUMERATOR at %C") | |
4126 | == FAILURE) | |
4127 | return MATCH_ERROR; | |
4128 | ||
4129 | return MATCH_YES; | |
4130 | } | |
4131 | ||
4132 | ||
4133 | /* Match the enumerator definition statement. */ | |
4134 | ||
4135 | match | |
4136 | gfc_match_enumerator_def (void) | |
4137 | { | |
4138 | match m; | |
4139 | int elem; | |
4140 | ||
4141 | gfc_clear_ts (¤t_ts); | |
4142 | ||
4143 | m = gfc_match (" enumerator"); | |
4144 | if (m != MATCH_YES) | |
4145 | return m; | |
4146 | ||
4147 | if (gfc_current_state () != COMP_ENUM) | |
4148 | { | |
4149 | gfc_error ("ENUM definition statement expected before %C"); | |
4150 | gfc_free_enum_history (); | |
4151 | return MATCH_ERROR; | |
4152 | } | |
4153 | ||
4154 | (¤t_ts)->type = BT_INTEGER; | |
4155 | (¤t_ts)->kind = gfc_c_int_kind; | |
4156 | ||
4157 | m = match_attr_spec (); | |
4158 | if (m == MATCH_ERROR) | |
4159 | { | |
4160 | m = MATCH_NO; | |
4161 | goto cleanup; | |
4162 | } | |
4163 | ||
4164 | elem = 1; | |
4165 | for (;;) | |
4166 | { | |
4167 | m = variable_decl (elem++); | |
4168 | if (m == MATCH_ERROR) | |
4169 | goto cleanup; | |
4170 | if (m == MATCH_NO) | |
4171 | break; | |
4172 | ||
4173 | if (gfc_match_eos () == MATCH_YES) | |
4174 | goto cleanup; | |
4175 | if (gfc_match_char (',') != MATCH_YES) | |
4176 | break; | |
4177 | } | |
4178 | ||
4179 | if (gfc_current_state () == COMP_ENUM) | |
4180 | { | |
4181 | gfc_free_enum_history (); | |
4182 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
4183 | m = MATCH_ERROR; | |
4184 | } | |
4185 | ||
4186 | cleanup: | |
4187 | gfc_free_array_spec (current_as); | |
4188 | current_as = NULL; | |
4189 | return m; | |
4190 | ||
4191 | } | |
4192 |