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Commit | Line | Data |
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6de9cd9a | 1 | /* Declaration statement matcher |
636dff67 SK |
2 | Copyright (C) 2002, 2004, 2005, 2006, 2007 |
3 | Free Software Foundation, Inc. | |
6de9cd9a DN |
4 | Contributed by Andy Vaught |
5 | ||
9fc4d79b | 6 | This file is part of GCC. |
6de9cd9a | 7 | |
9fc4d79b TS |
8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
10 | Software Foundation; either version 2, or (at your option) any later | |
11 | version. | |
6de9cd9a | 12 | |
9fc4d79b TS |
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
6de9cd9a DN |
17 | |
18 | You should have received a copy of the GNU General Public License | |
9fc4d79b | 19 | along with GCC; see the file COPYING. If not, write to the Free |
ab57747b KC |
20 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
21 | 02110-1301, USA. */ | |
6de9cd9a | 22 | |
6de9cd9a | 23 | #include "config.h" |
d22e4895 | 24 | #include "system.h" |
6de9cd9a DN |
25 | #include "gfortran.h" |
26 | #include "match.h" | |
27 | #include "parse.h" | |
6de9cd9a | 28 | |
2054fc29 | 29 | /* This flag is set if an old-style length selector is matched |
6de9cd9a DN |
30 | during a type-declaration statement. */ |
31 | ||
32 | static int old_char_selector; | |
33 | ||
46fa431d | 34 | /* When variables acquire types and attributes from a declaration |
6de9cd9a DN |
35 | statement, they get them from the following static variables. The |
36 | first part of a declaration sets these variables and the second | |
37 | part copies these into symbol structures. */ | |
38 | ||
39 | static gfc_typespec current_ts; | |
40 | ||
41 | static symbol_attribute current_attr; | |
42 | static gfc_array_spec *current_as; | |
43 | static int colon_seen; | |
44 | ||
25d8f0a2 TS |
45 | /* Initializer of the previous enumerator. */ |
46 | ||
47 | static gfc_expr *last_initializer; | |
48 | ||
49 | /* History of all the enumerators is maintained, so that | |
50 | kind values of all the enumerators could be updated depending | |
51 | upon the maximum initialized value. */ | |
52 | ||
53 | typedef struct enumerator_history | |
54 | { | |
55 | gfc_symbol *sym; | |
56 | gfc_expr *initializer; | |
57 | struct enumerator_history *next; | |
58 | } | |
59 | enumerator_history; | |
60 | ||
61 | /* Header of enum history chain. */ | |
62 | ||
63 | static enumerator_history *enum_history = NULL; | |
64 | ||
65 | /* Pointer of enum history node containing largest initializer. */ | |
66 | ||
67 | static enumerator_history *max_enum = NULL; | |
68 | ||
6de9cd9a DN |
69 | /* gfc_new_block points to the symbol of a newly matched block. */ |
70 | ||
71 | gfc_symbol *gfc_new_block; | |
72 | ||
73 | ||
294fbfc8 TS |
74 | /********************* DATA statement subroutines *********************/ |
75 | ||
2220652d PT |
76 | static bool in_match_data = false; |
77 | ||
78 | bool | |
79 | gfc_in_match_data (void) | |
80 | { | |
81 | return in_match_data; | |
82 | } | |
83 | ||
84 | void | |
85 | gfc_set_in_match_data (bool set_value) | |
86 | { | |
87 | in_match_data = set_value; | |
88 | } | |
89 | ||
294fbfc8 TS |
90 | /* Free a gfc_data_variable structure and everything beneath it. */ |
91 | ||
92 | static void | |
636dff67 | 93 | free_variable (gfc_data_variable *p) |
294fbfc8 TS |
94 | { |
95 | gfc_data_variable *q; | |
96 | ||
97 | for (; p; p = q) | |
98 | { | |
99 | q = p->next; | |
100 | gfc_free_expr (p->expr); | |
101 | gfc_free_iterator (&p->iter, 0); | |
102 | free_variable (p->list); | |
294fbfc8 TS |
103 | gfc_free (p); |
104 | } | |
105 | } | |
106 | ||
107 | ||
108 | /* Free a gfc_data_value structure and everything beneath it. */ | |
109 | ||
110 | static void | |
636dff67 | 111 | free_value (gfc_data_value *p) |
294fbfc8 TS |
112 | { |
113 | gfc_data_value *q; | |
114 | ||
115 | for (; p; p = q) | |
116 | { | |
117 | q = p->next; | |
118 | gfc_free_expr (p->expr); | |
119 | gfc_free (p); | |
120 | } | |
121 | } | |
122 | ||
123 | ||
124 | /* Free a list of gfc_data structures. */ | |
125 | ||
126 | void | |
636dff67 | 127 | gfc_free_data (gfc_data *p) |
294fbfc8 TS |
128 | { |
129 | gfc_data *q; | |
130 | ||
131 | for (; p; p = q) | |
132 | { | |
133 | q = p->next; | |
294fbfc8 TS |
134 | free_variable (p->var); |
135 | free_value (p->value); | |
294fbfc8 TS |
136 | gfc_free (p); |
137 | } | |
138 | } | |
139 | ||
140 | ||
a9f6f1f2 | 141 | /* Free all data in a namespace. */ |
636dff67 | 142 | |
a9f6f1f2 JD |
143 | static void |
144 | gfc_free_data_all (gfc_namespace * ns) | |
145 | { | |
146 | gfc_data *d; | |
147 | ||
148 | for (;ns->data;) | |
149 | { | |
150 | d = ns->data->next; | |
151 | gfc_free (ns->data); | |
152 | ns->data = d; | |
153 | } | |
154 | } | |
155 | ||
156 | ||
294fbfc8 TS |
157 | static match var_element (gfc_data_variable *); |
158 | ||
159 | /* Match a list of variables terminated by an iterator and a right | |
160 | parenthesis. */ | |
161 | ||
162 | static match | |
636dff67 | 163 | var_list (gfc_data_variable *parent) |
294fbfc8 TS |
164 | { |
165 | gfc_data_variable *tail, var; | |
166 | match m; | |
167 | ||
168 | m = var_element (&var); | |
169 | if (m == MATCH_ERROR) | |
170 | return MATCH_ERROR; | |
171 | if (m == MATCH_NO) | |
172 | goto syntax; | |
173 | ||
174 | tail = gfc_get_data_variable (); | |
175 | *tail = var; | |
176 | ||
177 | parent->list = tail; | |
178 | ||
179 | for (;;) | |
180 | { | |
181 | if (gfc_match_char (',') != MATCH_YES) | |
182 | goto syntax; | |
183 | ||
184 | m = gfc_match_iterator (&parent->iter, 1); | |
185 | if (m == MATCH_YES) | |
186 | break; | |
187 | if (m == MATCH_ERROR) | |
188 | return MATCH_ERROR; | |
189 | ||
190 | m = var_element (&var); | |
191 | if (m == MATCH_ERROR) | |
192 | return MATCH_ERROR; | |
193 | if (m == MATCH_NO) | |
194 | goto syntax; | |
195 | ||
196 | tail->next = gfc_get_data_variable (); | |
197 | tail = tail->next; | |
198 | ||
199 | *tail = var; | |
200 | } | |
201 | ||
202 | if (gfc_match_char (')') != MATCH_YES) | |
203 | goto syntax; | |
204 | return MATCH_YES; | |
205 | ||
206 | syntax: | |
207 | gfc_syntax_error (ST_DATA); | |
208 | return MATCH_ERROR; | |
209 | } | |
210 | ||
211 | ||
212 | /* Match a single element in a data variable list, which can be a | |
213 | variable-iterator list. */ | |
214 | ||
215 | static match | |
636dff67 | 216 | var_element (gfc_data_variable *new) |
294fbfc8 TS |
217 | { |
218 | match m; | |
219 | gfc_symbol *sym; | |
220 | ||
221 | memset (new, 0, sizeof (gfc_data_variable)); | |
222 | ||
223 | if (gfc_match_char ('(') == MATCH_YES) | |
224 | return var_list (new); | |
225 | ||
226 | m = gfc_match_variable (&new->expr, 0); | |
227 | if (m != MATCH_YES) | |
228 | return m; | |
229 | ||
230 | sym = new->expr->symtree->n.sym; | |
231 | ||
636dff67 SK |
232 | if (!sym->attr.function && gfc_current_ns->parent |
233 | && gfc_current_ns->parent == sym->ns) | |
294fbfc8 | 234 | { |
4075a94e | 235 | gfc_error ("Host associated variable '%s' may not be in the DATA " |
e25a0da3 | 236 | "statement at %C", sym->name); |
294fbfc8 TS |
237 | return MATCH_ERROR; |
238 | } | |
239 | ||
4075a94e | 240 | if (gfc_current_state () != COMP_BLOCK_DATA |
636dff67 SK |
241 | && sym->attr.in_common |
242 | && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of " | |
243 | "common block variable '%s' in DATA statement at %C", | |
244 | sym->name) == FAILURE) | |
4075a94e | 245 | return MATCH_ERROR; |
294fbfc8 | 246 | |
231b2fcc | 247 | if (gfc_add_data (&sym->attr, sym->name, &new->expr->where) == FAILURE) |
294fbfc8 TS |
248 | return MATCH_ERROR; |
249 | ||
250 | return MATCH_YES; | |
251 | } | |
252 | ||
253 | ||
254 | /* Match the top-level list of data variables. */ | |
255 | ||
256 | static match | |
636dff67 | 257 | top_var_list (gfc_data *d) |
294fbfc8 TS |
258 | { |
259 | gfc_data_variable var, *tail, *new; | |
260 | match m; | |
261 | ||
262 | tail = NULL; | |
263 | ||
264 | for (;;) | |
265 | { | |
266 | m = var_element (&var); | |
267 | if (m == MATCH_NO) | |
268 | goto syntax; | |
269 | if (m == MATCH_ERROR) | |
270 | return MATCH_ERROR; | |
271 | ||
272 | new = gfc_get_data_variable (); | |
273 | *new = var; | |
274 | ||
275 | if (tail == NULL) | |
276 | d->var = new; | |
277 | else | |
278 | tail->next = new; | |
279 | ||
280 | tail = new; | |
281 | ||
282 | if (gfc_match_char ('/') == MATCH_YES) | |
283 | break; | |
284 | if (gfc_match_char (',') != MATCH_YES) | |
285 | goto syntax; | |
286 | } | |
287 | ||
288 | return MATCH_YES; | |
289 | ||
290 | syntax: | |
291 | gfc_syntax_error (ST_DATA); | |
a9f6f1f2 | 292 | gfc_free_data_all (gfc_current_ns); |
294fbfc8 TS |
293 | return MATCH_ERROR; |
294 | } | |
295 | ||
296 | ||
297 | static match | |
636dff67 | 298 | match_data_constant (gfc_expr **result) |
294fbfc8 TS |
299 | { |
300 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
301 | gfc_symbol *sym; | |
302 | gfc_expr *expr; | |
303 | match m; | |
304 | ||
305 | m = gfc_match_literal_constant (&expr, 1); | |
306 | if (m == MATCH_YES) | |
307 | { | |
308 | *result = expr; | |
309 | return MATCH_YES; | |
310 | } | |
311 | ||
312 | if (m == MATCH_ERROR) | |
313 | return MATCH_ERROR; | |
314 | ||
315 | m = gfc_match_null (result); | |
316 | if (m != MATCH_NO) | |
317 | return m; | |
318 | ||
319 | m = gfc_match_name (name); | |
320 | if (m != MATCH_YES) | |
321 | return m; | |
322 | ||
323 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
324 | return MATCH_ERROR; | |
325 | ||
326 | if (sym == NULL | |
327 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
328 | { | |
329 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
330 | name); | |
331 | return MATCH_ERROR; | |
332 | } | |
333 | else if (sym->attr.flavor == FL_DERIVED) | |
334 | return gfc_match_structure_constructor (sym, result); | |
335 | ||
336 | *result = gfc_copy_expr (sym->value); | |
337 | return MATCH_YES; | |
338 | } | |
339 | ||
340 | ||
341 | /* Match a list of values in a DATA statement. The leading '/' has | |
342 | already been seen at this point. */ | |
343 | ||
344 | static match | |
636dff67 | 345 | top_val_list (gfc_data *data) |
294fbfc8 TS |
346 | { |
347 | gfc_data_value *new, *tail; | |
348 | gfc_expr *expr; | |
349 | const char *msg; | |
350 | match m; | |
351 | ||
352 | tail = NULL; | |
353 | ||
354 | for (;;) | |
355 | { | |
356 | m = match_data_constant (&expr); | |
357 | if (m == MATCH_NO) | |
358 | goto syntax; | |
359 | if (m == MATCH_ERROR) | |
360 | return MATCH_ERROR; | |
361 | ||
362 | new = gfc_get_data_value (); | |
363 | ||
364 | if (tail == NULL) | |
365 | data->value = new; | |
366 | else | |
367 | tail->next = new; | |
368 | ||
369 | tail = new; | |
370 | ||
371 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
372 | { | |
373 | tail->expr = expr; | |
374 | tail->repeat = 1; | |
375 | } | |
376 | else | |
377 | { | |
378 | signed int tmp; | |
379 | msg = gfc_extract_int (expr, &tmp); | |
380 | gfc_free_expr (expr); | |
381 | if (msg != NULL) | |
382 | { | |
383 | gfc_error (msg); | |
384 | return MATCH_ERROR; | |
385 | } | |
386 | tail->repeat = tmp; | |
387 | ||
388 | m = match_data_constant (&tail->expr); | |
389 | if (m == MATCH_NO) | |
390 | goto syntax; | |
391 | if (m == MATCH_ERROR) | |
392 | return MATCH_ERROR; | |
393 | } | |
394 | ||
395 | if (gfc_match_char ('/') == MATCH_YES) | |
396 | break; | |
397 | if (gfc_match_char (',') == MATCH_NO) | |
398 | goto syntax; | |
399 | } | |
400 | ||
401 | return MATCH_YES; | |
402 | ||
403 | syntax: | |
404 | gfc_syntax_error (ST_DATA); | |
a9f6f1f2 | 405 | gfc_free_data_all (gfc_current_ns); |
294fbfc8 TS |
406 | return MATCH_ERROR; |
407 | } | |
408 | ||
409 | ||
410 | /* Matches an old style initialization. */ | |
411 | ||
412 | static match | |
413 | match_old_style_init (const char *name) | |
414 | { | |
415 | match m; | |
416 | gfc_symtree *st; | |
ed0e3607 | 417 | gfc_symbol *sym; |
294fbfc8 TS |
418 | gfc_data *newdata; |
419 | ||
420 | /* Set up data structure to hold initializers. */ | |
421 | gfc_find_sym_tree (name, NULL, 0, &st); | |
ed0e3607 AL |
422 | sym = st->n.sym; |
423 | ||
294fbfc8 TS |
424 | newdata = gfc_get_data (); |
425 | newdata->var = gfc_get_data_variable (); | |
426 | newdata->var->expr = gfc_get_variable_expr (st); | |
8c5c0b80 | 427 | newdata->where = gfc_current_locus; |
294fbfc8 TS |
428 | |
429 | /* Match initial value list. This also eats the terminal | |
430 | '/'. */ | |
431 | m = top_val_list (newdata); | |
432 | if (m != MATCH_YES) | |
433 | { | |
434 | gfc_free (newdata); | |
435 | return m; | |
436 | } | |
437 | ||
438 | if (gfc_pure (NULL)) | |
439 | { | |
440 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
441 | gfc_free (newdata); | |
442 | return MATCH_ERROR; | |
443 | } | |
444 | ||
ed0e3607 AL |
445 | /* Mark the variable as having appeared in a data statement. */ |
446 | if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) | |
447 | { | |
448 | gfc_free (newdata); | |
449 | return MATCH_ERROR; | |
450 | } | |
451 | ||
294fbfc8 TS |
452 | /* Chain in namespace list of DATA initializers. */ |
453 | newdata->next = gfc_current_ns->data; | |
454 | gfc_current_ns->data = newdata; | |
455 | ||
456 | return m; | |
457 | } | |
458 | ||
636dff67 | 459 | |
294fbfc8 | 460 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
13795658 | 461 | we are matching a DATA statement and are therefore issuing an error |
294fbfc8 | 462 | if we encounter something unexpected, if not, we're trying to match |
69de3b83 | 463 | an old-style initialization expression of the form INTEGER I /2/. */ |
294fbfc8 TS |
464 | |
465 | match | |
466 | gfc_match_data (void) | |
467 | { | |
468 | gfc_data *new; | |
469 | match m; | |
470 | ||
2220652d PT |
471 | gfc_set_in_match_data (true); |
472 | ||
294fbfc8 TS |
473 | for (;;) |
474 | { | |
475 | new = gfc_get_data (); | |
476 | new->where = gfc_current_locus; | |
477 | ||
478 | m = top_var_list (new); | |
479 | if (m != MATCH_YES) | |
480 | goto cleanup; | |
481 | ||
482 | m = top_val_list (new); | |
483 | if (m != MATCH_YES) | |
484 | goto cleanup; | |
485 | ||
486 | new->next = gfc_current_ns->data; | |
487 | gfc_current_ns->data = new; | |
488 | ||
489 | if (gfc_match_eos () == MATCH_YES) | |
490 | break; | |
491 | ||
492 | gfc_match_char (','); /* Optional comma */ | |
493 | } | |
494 | ||
2220652d PT |
495 | gfc_set_in_match_data (false); |
496 | ||
294fbfc8 TS |
497 | if (gfc_pure (NULL)) |
498 | { | |
499 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
500 | return MATCH_ERROR; | |
501 | } | |
502 | ||
503 | return MATCH_YES; | |
504 | ||
505 | cleanup: | |
2220652d | 506 | gfc_set_in_match_data (false); |
294fbfc8 TS |
507 | gfc_free_data (new); |
508 | return MATCH_ERROR; | |
509 | } | |
510 | ||
511 | ||
512 | /************************ Declaration statements *********************/ | |
513 | ||
6de9cd9a DN |
514 | /* Match an intent specification. Since this can only happen after an |
515 | INTENT word, a legal intent-spec must follow. */ | |
516 | ||
517 | static sym_intent | |
518 | match_intent_spec (void) | |
519 | { | |
520 | ||
521 | if (gfc_match (" ( in out )") == MATCH_YES) | |
522 | return INTENT_INOUT; | |
523 | if (gfc_match (" ( in )") == MATCH_YES) | |
524 | return INTENT_IN; | |
525 | if (gfc_match (" ( out )") == MATCH_YES) | |
526 | return INTENT_OUT; | |
527 | ||
528 | gfc_error ("Bad INTENT specification at %C"); | |
529 | return INTENT_UNKNOWN; | |
530 | } | |
531 | ||
532 | ||
533 | /* Matches a character length specification, which is either a | |
534 | specification expression or a '*'. */ | |
535 | ||
536 | static match | |
636dff67 | 537 | char_len_param_value (gfc_expr **expr) |
6de9cd9a | 538 | { |
6de9cd9a DN |
539 | if (gfc_match_char ('*') == MATCH_YES) |
540 | { | |
541 | *expr = NULL; | |
542 | return MATCH_YES; | |
543 | } | |
544 | ||
545 | return gfc_match_expr (expr); | |
546 | } | |
547 | ||
548 | ||
549 | /* A character length is a '*' followed by a literal integer or a | |
550 | char_len_param_value in parenthesis. */ | |
551 | ||
552 | static match | |
636dff67 | 553 | match_char_length (gfc_expr **expr) |
6de9cd9a | 554 | { |
5cf54585 | 555 | int length; |
6de9cd9a DN |
556 | match m; |
557 | ||
558 | m = gfc_match_char ('*'); | |
559 | if (m != MATCH_YES) | |
560 | return m; | |
561 | ||
5cf54585 | 562 | m = gfc_match_small_literal_int (&length, NULL); |
6de9cd9a DN |
563 | if (m == MATCH_ERROR) |
564 | return m; | |
565 | ||
566 | if (m == MATCH_YES) | |
567 | { | |
568 | *expr = gfc_int_expr (length); | |
569 | return m; | |
570 | } | |
571 | ||
572 | if (gfc_match_char ('(') == MATCH_NO) | |
573 | goto syntax; | |
574 | ||
575 | m = char_len_param_value (expr); | |
576 | if (m == MATCH_ERROR) | |
577 | return m; | |
578 | if (m == MATCH_NO) | |
579 | goto syntax; | |
580 | ||
581 | if (gfc_match_char (')') == MATCH_NO) | |
582 | { | |
583 | gfc_free_expr (*expr); | |
584 | *expr = NULL; | |
585 | goto syntax; | |
586 | } | |
587 | ||
588 | return MATCH_YES; | |
589 | ||
590 | syntax: | |
591 | gfc_error ("Syntax error in character length specification at %C"); | |
592 | return MATCH_ERROR; | |
593 | } | |
594 | ||
595 | ||
9e35b386 EE |
596 | /* Special subroutine for finding a symbol. Check if the name is found |
597 | in the current name space. If not, and we're compiling a function or | |
598 | subroutine and the parent compilation unit is an interface, then check | |
599 | to see if the name we've been given is the name of the interface | |
600 | (located in another namespace). */ | |
6de9cd9a DN |
601 | |
602 | static int | |
636dff67 | 603 | find_special (const char *name, gfc_symbol **result) |
6de9cd9a DN |
604 | { |
605 | gfc_state_data *s; | |
9e35b386 | 606 | int i; |
6de9cd9a | 607 | |
9e35b386 | 608 | i = gfc_get_symbol (name, NULL, result); |
636dff67 | 609 | if (i == 0) |
9e35b386 EE |
610 | goto end; |
611 | ||
6de9cd9a DN |
612 | if (gfc_current_state () != COMP_SUBROUTINE |
613 | && gfc_current_state () != COMP_FUNCTION) | |
9e35b386 | 614 | goto end; |
6de9cd9a DN |
615 | |
616 | s = gfc_state_stack->previous; | |
617 | if (s == NULL) | |
9e35b386 | 618 | goto end; |
6de9cd9a DN |
619 | |
620 | if (s->state != COMP_INTERFACE) | |
9e35b386 | 621 | goto end; |
6de9cd9a | 622 | if (s->sym == NULL) |
636dff67 | 623 | goto end; /* Nameless interface */ |
6de9cd9a DN |
624 | |
625 | if (strcmp (name, s->sym->name) == 0) | |
626 | { | |
627 | *result = s->sym; | |
628 | return 0; | |
629 | } | |
630 | ||
9e35b386 EE |
631 | end: |
632 | return i; | |
6de9cd9a DN |
633 | } |
634 | ||
635 | ||
636 | /* Special subroutine for getting a symbol node associated with a | |
637 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
638 | symbol is created in the parent using with symtree node in the | |
639 | child unit pointing to the symbol. If the current namespace has no | |
640 | parent, then the symbol is just created in the current unit. */ | |
641 | ||
642 | static int | |
636dff67 | 643 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
6de9cd9a DN |
644 | { |
645 | gfc_symtree *st; | |
646 | gfc_symbol *sym; | |
647 | int rc; | |
648 | ||
1a492601 PT |
649 | /* Module functions have to be left in their own namespace because |
650 | they have potentially (almost certainly!) already been referenced. | |
651 | In this sense, they are rather like external functions. This is | |
652 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
653 | space is set to point to the master function, so that the fake | |
654 | result mechanism can work. */ | |
655 | if (module_fcn_entry) | |
68ea355b PT |
656 | rc = gfc_get_symbol (name, NULL, result); |
657 | else | |
658 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
6de9cd9a | 659 | |
68ea355b | 660 | sym = *result; |
2c693a24 | 661 | gfc_current_ns->refs++; |
6de9cd9a | 662 | |
68ea355b PT |
663 | if (sym && !sym->new && gfc_current_state () != COMP_INTERFACE) |
664 | { | |
cda7004b PT |
665 | /* Trap another encompassed procedure with the same name. All |
666 | these conditions are necessary to avoid picking up an entry | |
667 | whose name clashes with that of the encompassing procedure; | |
668 | this is handled using gsymbols to register unique,globally | |
669 | accessible names. */ | |
68ea355b | 670 | if (sym->attr.flavor != 0 |
636dff67 SK |
671 | && sym->attr.proc != 0 |
672 | && (sym->attr.subroutine || sym->attr.function) | |
673 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
68ea355b PT |
674 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
675 | name, &sym->declared_at); | |
676 | ||
677 | /* Trap declarations of attributes in encompassing scope. The | |
678 | signature for this is that ts.kind is set. Legitimate | |
679 | references only set ts.type. */ | |
680 | if (sym->ts.kind != 0 | |
636dff67 SK |
681 | && !sym->attr.implicit_type |
682 | && sym->attr.proc == 0 | |
683 | && gfc_current_ns->parent != NULL | |
684 | && sym->attr.access == 0 | |
685 | && !module_fcn_entry) | |
686 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
687 | "and must not have attributes declared at %L", | |
68ea355b PT |
688 | name, &sym->declared_at); |
689 | } | |
690 | ||
691 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
692 | return rc; | |
6de9cd9a | 693 | |
1a492601 PT |
694 | /* Module function entries will already have a symtree in |
695 | the current namespace but will need one at module level. */ | |
696 | if (module_fcn_entry) | |
697 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
698 | else | |
699 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
6de9cd9a | 700 | |
6de9cd9a DN |
701 | st->n.sym = sym; |
702 | sym->refs++; | |
703 | ||
704 | /* See if the procedure should be a module procedure */ | |
705 | ||
1a492601 | 706 | if (((sym->ns->proc_name != NULL |
636dff67 SK |
707 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
708 | && sym->attr.proc != PROC_MODULE) || module_fcn_entry) | |
709 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
710 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
711 | rc = 2; |
712 | ||
713 | return rc; | |
714 | } | |
715 | ||
716 | ||
717 | /* Function called by variable_decl() that adds a name to the symbol | |
718 | table. */ | |
719 | ||
720 | static try | |
636dff67 SK |
721 | build_sym (const char *name, gfc_charlen *cl, |
722 | gfc_array_spec **as, locus *var_locus) | |
6de9cd9a DN |
723 | { |
724 | symbol_attribute attr; | |
725 | gfc_symbol *sym; | |
726 | ||
9e35b386 | 727 | if (gfc_get_symbol (name, NULL, &sym)) |
6de9cd9a DN |
728 | return FAILURE; |
729 | ||
730 | /* Start updating the symbol table. Add basic type attribute | |
731 | if present. */ | |
732 | if (current_ts.type != BT_UNKNOWN | |
636dff67 SK |
733 | && (sym->attr.implicit_type == 0 |
734 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
6de9cd9a DN |
735 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
736 | return FAILURE; | |
737 | ||
738 | if (sym->ts.type == BT_CHARACTER) | |
739 | sym->ts.cl = cl; | |
740 | ||
741 | /* Add dimension attribute if present. */ | |
742 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
743 | return FAILURE; | |
744 | *as = NULL; | |
745 | ||
746 | /* Add attribute to symbol. The copy is so that we can reset the | |
747 | dimension attribute. */ | |
748 | attr = current_attr; | |
749 | attr.dimension = 0; | |
750 | ||
751 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
752 | return FAILURE; | |
753 | ||
754 | return SUCCESS; | |
755 | } | |
756 | ||
636dff67 | 757 | |
df7cc9b5 FW |
758 | /* Set character constant to the given length. The constant will be padded or |
759 | truncated. */ | |
760 | ||
761 | void | |
636dff67 | 762 | gfc_set_constant_character_len (int len, gfc_expr *expr, bool array) |
df7cc9b5 | 763 | { |
636dff67 | 764 | char *s; |
df7cc9b5 FW |
765 | int slen; |
766 | ||
767 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
768 | gcc_assert (expr->ts.type == BT_CHARACTER && expr->ts.kind == 1); | |
769 | ||
770 | slen = expr->value.character.length; | |
771 | if (len != slen) | |
772 | { | |
150675a8 | 773 | s = gfc_getmem (len + 1); |
df7cc9b5 FW |
774 | memcpy (s, expr->value.character.string, MIN (len, slen)); |
775 | if (len > slen) | |
776 | memset (&s[slen], ' ', len - slen); | |
2220652d PT |
777 | |
778 | if (gfc_option.warn_character_truncation && slen > len) | |
779 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
780 | "(%d/%d)", &expr->where, slen, len); | |
781 | ||
782 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
783 | initializers. */ | |
784 | if (array && slen < len && !(gfc_option.allow_std & GFC_STD_GNU)) | |
785 | gfc_error_now ("The CHARACTER elements of the array constructor " | |
786 | "at %L must have the same length (%d/%d)", | |
636dff67 | 787 | &expr->where, slen, len); |
2220652d | 788 | |
150675a8 | 789 | s[len] = '\0'; |
df7cc9b5 FW |
790 | gfc_free (expr->value.character.string); |
791 | expr->value.character.string = s; | |
792 | expr->value.character.length = len; | |
793 | } | |
794 | } | |
6de9cd9a | 795 | |
25d8f0a2 | 796 | |
831d7813 | 797 | /* Function to create and update the enumerator history |
25d8f0a2 TS |
798 | using the information passed as arguments. |
799 | Pointer "max_enum" is also updated, to point to | |
800 | enum history node containing largest initializer. | |
801 | ||
802 | SYM points to the symbol node of enumerator. | |
803 | INIT points to its enumerator value. */ | |
804 | ||
805 | static void | |
636dff67 | 806 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
25d8f0a2 TS |
807 | { |
808 | enumerator_history *new_enum_history; | |
809 | gcc_assert (sym != NULL && init != NULL); | |
810 | ||
811 | new_enum_history = gfc_getmem (sizeof (enumerator_history)); | |
812 | ||
813 | new_enum_history->sym = sym; | |
814 | new_enum_history->initializer = init; | |
815 | new_enum_history->next = NULL; | |
816 | ||
817 | if (enum_history == NULL) | |
818 | { | |
819 | enum_history = new_enum_history; | |
820 | max_enum = enum_history; | |
821 | } | |
822 | else | |
823 | { | |
824 | new_enum_history->next = enum_history; | |
825 | enum_history = new_enum_history; | |
826 | ||
827 | if (mpz_cmp (max_enum->initializer->value.integer, | |
828 | new_enum_history->initializer->value.integer) < 0) | |
636dff67 | 829 | max_enum = new_enum_history; |
25d8f0a2 TS |
830 | } |
831 | } | |
832 | ||
833 | ||
834 | /* Function to free enum kind history. */ | |
835 | ||
836 | void | |
636dff67 | 837 | gfc_free_enum_history (void) |
25d8f0a2 TS |
838 | { |
839 | enumerator_history *current = enum_history; | |
840 | enumerator_history *next; | |
841 | ||
842 | while (current != NULL) | |
843 | { | |
844 | next = current->next; | |
845 | gfc_free (current); | |
846 | current = next; | |
847 | } | |
848 | max_enum = NULL; | |
849 | enum_history = NULL; | |
850 | } | |
851 | ||
852 | ||
6de9cd9a DN |
853 | /* Function called by variable_decl() that adds an initialization |
854 | expression to a symbol. */ | |
855 | ||
856 | static try | |
636dff67 SK |
857 | add_init_expr_to_sym (const char *name, gfc_expr **initp, |
858 | locus *var_locus) | |
6de9cd9a DN |
859 | { |
860 | symbol_attribute attr; | |
861 | gfc_symbol *sym; | |
862 | gfc_expr *init; | |
863 | ||
864 | init = *initp; | |
865 | if (find_special (name, &sym)) | |
866 | return FAILURE; | |
867 | ||
868 | attr = sym->attr; | |
869 | ||
870 | /* If this symbol is confirming an implicit parameter type, | |
871 | then an initialization expression is not allowed. */ | |
872 | if (attr.flavor == FL_PARAMETER | |
873 | && sym->value != NULL | |
874 | && *initp != NULL) | |
875 | { | |
876 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
877 | sym->name); | |
878 | return FAILURE; | |
879 | } | |
880 | ||
c8e20bd0 TS |
881 | if (attr.in_common |
882 | && !attr.data | |
883 | && *initp != NULL) | |
884 | { | |
885 | gfc_error ("Initializer not allowed for COMMON variable '%s' at %C", | |
886 | sym->name); | |
887 | return FAILURE; | |
888 | } | |
889 | ||
6de9cd9a DN |
890 | if (init == NULL) |
891 | { | |
892 | /* An initializer is required for PARAMETER declarations. */ | |
893 | if (attr.flavor == FL_PARAMETER) | |
894 | { | |
895 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
896 | return FAILURE; | |
897 | } | |
898 | } | |
899 | else | |
900 | { | |
901 | /* If a variable appears in a DATA block, it cannot have an | |
1de8a836 | 902 | initializer. */ |
6de9cd9a DN |
903 | if (sym->attr.data) |
904 | { | |
636dff67 SK |
905 | gfc_error ("Variable '%s' at %C with an initializer already " |
906 | "appears in a DATA statement", sym->name); | |
6de9cd9a DN |
907 | return FAILURE; |
908 | } | |
909 | ||
75d17889 TS |
910 | /* Check if the assignment can happen. This has to be put off |
911 | until later for a derived type variable. */ | |
6de9cd9a DN |
912 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
913 | && gfc_check_assign_symbol (sym, init) == FAILURE) | |
914 | return FAILURE; | |
915 | ||
df7cc9b5 FW |
916 | if (sym->ts.type == BT_CHARACTER && sym->ts.cl) |
917 | { | |
918 | /* Update symbol character length according initializer. */ | |
919 | if (sym->ts.cl->length == NULL) | |
920 | { | |
4213f93b PT |
921 | /* If there are multiple CHARACTER variables declared on |
922 | the same line, we don't want them to share the same | |
636dff67 | 923 | length. */ |
4213f93b PT |
924 | sym->ts.cl = gfc_get_charlen (); |
925 | sym->ts.cl->next = gfc_current_ns->cl_list; | |
926 | gfc_current_ns->cl_list = sym->ts.cl; | |
96f4873b PT |
927 | |
928 | if (sym->attr.flavor == FL_PARAMETER | |
636dff67 | 929 | && init->expr_type == EXPR_ARRAY) |
96f4873b | 930 | sym->ts.cl->length = gfc_copy_expr (init->ts.cl->length); |
df7cc9b5 FW |
931 | } |
932 | /* Update initializer character length according symbol. */ | |
933 | else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT) | |
934 | { | |
935 | int len = mpz_get_si (sym->ts.cl->length->value.integer); | |
936 | gfc_constructor * p; | |
937 | ||
938 | if (init->expr_type == EXPR_CONSTANT) | |
2220652d | 939 | gfc_set_constant_character_len (len, init, false); |
df7cc9b5 FW |
940 | else if (init->expr_type == EXPR_ARRAY) |
941 | { | |
942 | gfc_free_expr (init->ts.cl->length); | |
943 | init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length); | |
944 | for (p = init->value.constructor; p; p = p->next) | |
2220652d | 945 | gfc_set_constant_character_len (len, p->expr, false); |
df7cc9b5 FW |
946 | } |
947 | } | |
948 | } | |
949 | ||
6de9cd9a DN |
950 | /* Add initializer. Make sure we keep the ranks sane. */ |
951 | if (sym->attr.dimension && init->rank == 0) | |
952 | init->rank = sym->as->rank; | |
953 | ||
954 | sym->value = init; | |
955 | *initp = NULL; | |
956 | } | |
957 | ||
25d8f0a2 TS |
958 | /* Maintain enumerator history. */ |
959 | if (gfc_current_state () == COMP_ENUM) | |
960 | create_enum_history (sym, init); | |
961 | ||
6de9cd9a DN |
962 | return SUCCESS; |
963 | } | |
964 | ||
965 | ||
966 | /* Function called by variable_decl() that adds a name to a structure | |
967 | being built. */ | |
968 | ||
969 | static try | |
636dff67 SK |
970 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
971 | gfc_array_spec **as) | |
6de9cd9a DN |
972 | { |
973 | gfc_component *c; | |
974 | ||
975 | /* If the current symbol is of the same derived type that we're | |
976 | constructing, it must have the pointer attribute. */ | |
977 | if (current_ts.type == BT_DERIVED | |
978 | && current_ts.derived == gfc_current_block () | |
979 | && current_attr.pointer == 0) | |
980 | { | |
981 | gfc_error ("Component at %C must have the POINTER attribute"); | |
982 | return FAILURE; | |
983 | } | |
984 | ||
636dff67 | 985 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
6de9cd9a DN |
986 | { |
987 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
988 | { | |
989 | gfc_error ("Array component of structure at %C must have explicit " | |
990 | "or deferred shape"); | |
991 | return FAILURE; | |
992 | } | |
993 | } | |
994 | ||
995 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
996 | return FAILURE; | |
997 | ||
998 | c->ts = current_ts; | |
999 | c->ts.cl = cl; | |
1000 | gfc_set_component_attr (c, ¤t_attr); | |
1001 | ||
1002 | c->initializer = *init; | |
1003 | *init = NULL; | |
1004 | ||
1005 | c->as = *as; | |
1006 | if (c->as != NULL) | |
1007 | c->dimension = 1; | |
1008 | *as = NULL; | |
1009 | ||
1010 | /* Check array components. */ | |
1011 | if (!c->dimension) | |
5046aff5 PT |
1012 | { |
1013 | if (c->allocatable) | |
1014 | { | |
1015 | gfc_error ("Allocatable component at %C must be an array"); | |
1016 | return FAILURE; | |
1017 | } | |
1018 | else | |
1019 | return SUCCESS; | |
1020 | } | |
6de9cd9a DN |
1021 | |
1022 | if (c->pointer) | |
1023 | { | |
1024 | if (c->as->type != AS_DEFERRED) | |
1025 | { | |
5046aff5 PT |
1026 | gfc_error ("Pointer array component of structure at %C must have a " |
1027 | "deferred shape"); | |
1028 | return FAILURE; | |
1029 | } | |
1030 | } | |
1031 | else if (c->allocatable) | |
1032 | { | |
1033 | if (c->as->type != AS_DEFERRED) | |
1034 | { | |
1035 | gfc_error ("Allocatable component of structure at %C must have a " | |
1036 | "deferred shape"); | |
6de9cd9a DN |
1037 | return FAILURE; |
1038 | } | |
1039 | } | |
1040 | else | |
1041 | { | |
1042 | if (c->as->type != AS_EXPLICIT) | |
1043 | { | |
636dff67 SK |
1044 | gfc_error ("Array component of structure at %C must have an " |
1045 | "explicit shape"); | |
6de9cd9a DN |
1046 | return FAILURE; |
1047 | } | |
1048 | } | |
1049 | ||
1050 | return SUCCESS; | |
1051 | } | |
1052 | ||
1053 | ||
1054 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1055 | ||
1056 | match | |
636dff67 | 1057 | gfc_match_null (gfc_expr **result) |
6de9cd9a DN |
1058 | { |
1059 | gfc_symbol *sym; | |
1060 | gfc_expr *e; | |
1061 | match m; | |
1062 | ||
1063 | m = gfc_match (" null ( )"); | |
1064 | if (m != MATCH_YES) | |
1065 | return m; | |
1066 | ||
1067 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1068 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1069 | { | |
1070 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1071 | return MATCH_ERROR; | |
1072 | } | |
1073 | ||
1074 | gfc_intrinsic_symbol (sym); | |
1075 | ||
1076 | if (sym->attr.proc != PROC_INTRINSIC | |
231b2fcc TS |
1077 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1078 | sym->name, NULL) == FAILURE | |
1079 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
6de9cd9a DN |
1080 | return MATCH_ERROR; |
1081 | ||
1082 | e = gfc_get_expr (); | |
63645982 | 1083 | e->where = gfc_current_locus; |
6de9cd9a DN |
1084 | e->expr_type = EXPR_NULL; |
1085 | e->ts.type = BT_UNKNOWN; | |
1086 | ||
1087 | *result = e; | |
1088 | ||
1089 | return MATCH_YES; | |
1090 | } | |
1091 | ||
1092 | ||
6de9cd9a DN |
1093 | /* Match a variable name with an optional initializer. When this |
1094 | subroutine is called, a variable is expected to be parsed next. | |
1095 | Depending on what is happening at the moment, updates either the | |
1096 | symbol table or the current interface. */ | |
1097 | ||
1098 | static match | |
949d5b72 | 1099 | variable_decl (int elem) |
6de9cd9a DN |
1100 | { |
1101 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1102 | gfc_expr *initializer, *char_len; | |
1103 | gfc_array_spec *as; | |
83d890b9 | 1104 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
6de9cd9a DN |
1105 | gfc_charlen *cl; |
1106 | locus var_locus; | |
1107 | match m; | |
1108 | try t; | |
83d890b9 | 1109 | gfc_symbol *sym; |
25d8f0a2 | 1110 | locus old_locus; |
6de9cd9a DN |
1111 | |
1112 | initializer = NULL; | |
1113 | as = NULL; | |
83d890b9 | 1114 | cp_as = NULL; |
25d8f0a2 | 1115 | old_locus = gfc_current_locus; |
6de9cd9a DN |
1116 | |
1117 | /* When we get here, we've just matched a list of attributes and | |
1118 | maybe a type and a double colon. The next thing we expect to see | |
1119 | is the name of the symbol. */ | |
1120 | m = gfc_match_name (name); | |
1121 | if (m != MATCH_YES) | |
1122 | goto cleanup; | |
1123 | ||
63645982 | 1124 | var_locus = gfc_current_locus; |
6de9cd9a DN |
1125 | |
1126 | /* Now we could see the optional array spec. or character length. */ | |
1127 | m = gfc_match_array_spec (&as); | |
83d890b9 AL |
1128 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1129 | cp_as = gfc_copy_array_spec (as); | |
1130 | else if (m == MATCH_ERROR) | |
6de9cd9a | 1131 | goto cleanup; |
25d8f0a2 | 1132 | |
6de9cd9a DN |
1133 | if (m == MATCH_NO) |
1134 | as = gfc_copy_array_spec (current_as); | |
25d8f0a2 TS |
1135 | else if (gfc_current_state () == COMP_ENUM) |
1136 | { | |
1137 | gfc_error ("Enumerator cannot be array at %C"); | |
1138 | gfc_free_enum_history (); | |
1139 | m = MATCH_ERROR; | |
1140 | goto cleanup; | |
1141 | } | |
1142 | ||
6de9cd9a DN |
1143 | |
1144 | char_len = NULL; | |
1145 | cl = NULL; | |
1146 | ||
1147 | if (current_ts.type == BT_CHARACTER) | |
1148 | { | |
1149 | switch (match_char_length (&char_len)) | |
1150 | { | |
1151 | case MATCH_YES: | |
1152 | cl = gfc_get_charlen (); | |
1153 | cl->next = gfc_current_ns->cl_list; | |
1154 | gfc_current_ns->cl_list = cl; | |
1155 | ||
1156 | cl->length = char_len; | |
1157 | break; | |
1158 | ||
949d5b72 PT |
1159 | /* Non-constant lengths need to be copied after the first |
1160 | element. */ | |
6de9cd9a | 1161 | case MATCH_NO: |
949d5b72 | 1162 | if (elem > 1 && current_ts.cl->length |
636dff67 | 1163 | && current_ts.cl->length->expr_type != EXPR_CONSTANT) |
949d5b72 PT |
1164 | { |
1165 | cl = gfc_get_charlen (); | |
1166 | cl->next = gfc_current_ns->cl_list; | |
1167 | gfc_current_ns->cl_list = cl; | |
1168 | cl->length = gfc_copy_expr (current_ts.cl->length); | |
1169 | } | |
1170 | else | |
1171 | cl = current_ts.cl; | |
1172 | ||
6de9cd9a DN |
1173 | break; |
1174 | ||
1175 | case MATCH_ERROR: | |
1176 | goto cleanup; | |
1177 | } | |
1178 | } | |
1179 | ||
83d890b9 AL |
1180 | /* If this symbol has already shown up in a Cray Pointer declaration, |
1181 | then we want to set the type & bail out. */ | |
1182 | if (gfc_option.flag_cray_pointer) | |
1183 | { | |
1184 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1185 | if (sym != NULL && sym->attr.cray_pointee) | |
1186 | { | |
1187 | sym->ts.type = current_ts.type; | |
1188 | sym->ts.kind = current_ts.kind; | |
1189 | sym->ts.cl = cl; | |
1190 | sym->ts.derived = current_ts.derived; | |
1191 | m = MATCH_YES; | |
1192 | ||
1193 | /* Check to see if we have an array specification. */ | |
1194 | if (cp_as != NULL) | |
1195 | { | |
1196 | if (sym->as != NULL) | |
1197 | { | |
e25a0da3 | 1198 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
83d890b9 AL |
1199 | gfc_free_array_spec (cp_as); |
1200 | m = MATCH_ERROR; | |
1201 | goto cleanup; | |
1202 | } | |
1203 | else | |
1204 | { | |
1205 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1206 | gfc_internal_error ("Couldn't set pointee array spec."); | |
1207 | ||
1208 | /* Fix the array spec. */ | |
1209 | m = gfc_mod_pointee_as (sym->as); | |
1210 | if (m == MATCH_ERROR) | |
1211 | goto cleanup; | |
1212 | } | |
1213 | } | |
1214 | goto cleanup; | |
1215 | } | |
1216 | else | |
1217 | { | |
1218 | gfc_free_array_spec (cp_as); | |
1219 | } | |
1220 | } | |
1221 | ||
1222 | ||
6de9cd9a DN |
1223 | /* OK, we've successfully matched the declaration. Now put the |
1224 | symbol in the current namespace, because it might be used in the | |
69de3b83 | 1225 | optional initialization expression for this symbol, e.g. this is |
6de9cd9a DN |
1226 | perfectly legal: |
1227 | ||
1228 | integer, parameter :: i = huge(i) | |
1229 | ||
1230 | This is only true for parameters or variables of a basic type. | |
1231 | For components of derived types, it is not true, so we don't | |
1232 | create a symbol for those yet. If we fail to create the symbol, | |
1233 | bail out. */ | |
1234 | if (gfc_current_state () != COMP_DERIVED | |
1235 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1236 | { | |
72af9f0b PT |
1237 | m = MATCH_ERROR; |
1238 | goto cleanup; | |
1239 | } | |
1240 | ||
1241 | /* An interface body specifies all of the procedure's characteristics and these | |
1242 | shall be consistent with those specified in the procedure definition, except | |
1243 | that the interface may specify a procedure that is not pure if the procedure | |
1244 | is defined to be pure(12.3.2). */ | |
1245 | if (current_ts.type == BT_DERIVED | |
636dff67 SK |
1246 | && gfc_current_ns->proc_name |
1247 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
1248 | && current_ts.derived->ns != gfc_current_ns | |
1249 | && !gfc_current_ns->has_import_set) | |
72af9f0b PT |
1250 | { |
1251 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1252 | "interface", name); | |
6de9cd9a DN |
1253 | m = MATCH_ERROR; |
1254 | goto cleanup; | |
1255 | } | |
1256 | ||
1257 | /* In functions that have a RESULT variable defined, the function | |
1258 | name always refers to function calls. Therefore, the name is | |
1259 | not allowed to appear in specification statements. */ | |
1260 | if (gfc_current_state () == COMP_FUNCTION | |
1261 | && gfc_current_block () != NULL | |
1262 | && gfc_current_block ()->result != NULL | |
1263 | && gfc_current_block ()->result != gfc_current_block () | |
1264 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1265 | { | |
1266 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1267 | m = MATCH_ERROR; | |
1268 | goto cleanup; | |
1269 | } | |
1270 | ||
294fbfc8 TS |
1271 | /* We allow old-style initializations of the form |
1272 | integer i /2/, j(4) /3*3, 1/ | |
1273 | (if no colon has been seen). These are different from data | |
1274 | statements in that initializers are only allowed to apply to the | |
1275 | variable immediately preceding, i.e. | |
1276 | integer i, j /1, 2/ | |
1277 | is not allowed. Therefore we have to do some work manually, that | |
75d17889 | 1278 | could otherwise be left to the matchers for DATA statements. */ |
294fbfc8 TS |
1279 | |
1280 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1281 | { | |
1282 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1283 | "initialization at %C") == FAILURE) | |
1284 | return MATCH_ERROR; | |
1285 | ||
1286 | return match_old_style_init (name); | |
1287 | } | |
1288 | ||
6de9cd9a DN |
1289 | /* The double colon must be present in order to have initializers. |
1290 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1291 | if (colon_seen) | |
1292 | { | |
1293 | if (gfc_match (" =>") == MATCH_YES) | |
1294 | { | |
6de9cd9a DN |
1295 | if (!current_attr.pointer) |
1296 | { | |
1297 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1298 | m = MATCH_ERROR; | |
1299 | goto cleanup; | |
1300 | } | |
1301 | ||
1302 | m = gfc_match_null (&initializer); | |
1303 | if (m == MATCH_NO) | |
1304 | { | |
def66134 | 1305 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
6de9cd9a DN |
1306 | m = MATCH_ERROR; |
1307 | } | |
1308 | ||
1309 | if (gfc_pure (NULL)) | |
1310 | { | |
636dff67 SK |
1311 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1312 | "a PURE procedure"); | |
6de9cd9a DN |
1313 | m = MATCH_ERROR; |
1314 | } | |
1315 | ||
1316 | if (m != MATCH_YES) | |
1317 | goto cleanup; | |
1318 | ||
6de9cd9a DN |
1319 | } |
1320 | else if (gfc_match_char ('=') == MATCH_YES) | |
1321 | { | |
1322 | if (current_attr.pointer) | |
1323 | { | |
636dff67 SK |
1324 | gfc_error ("Pointer initialization at %C requires '=>', " |
1325 | "not '='"); | |
6de9cd9a DN |
1326 | m = MATCH_ERROR; |
1327 | goto cleanup; | |
1328 | } | |
1329 | ||
1330 | m = gfc_match_init_expr (&initializer); | |
1331 | if (m == MATCH_NO) | |
1332 | { | |
1333 | gfc_error ("Expected an initialization expression at %C"); | |
1334 | m = MATCH_ERROR; | |
1335 | } | |
1336 | ||
1337 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1338 | { | |
636dff67 SK |
1339 | gfc_error ("Initialization of variable at %C is not allowed in " |
1340 | "a PURE procedure"); | |
6de9cd9a DN |
1341 | m = MATCH_ERROR; |
1342 | } | |
1343 | ||
1344 | if (m != MATCH_YES) | |
1345 | goto cleanup; | |
1346 | } | |
cb44ab82 VL |
1347 | } |
1348 | ||
5046aff5 PT |
1349 | if (initializer != NULL && current_attr.allocatable |
1350 | && gfc_current_state () == COMP_DERIVED) | |
1351 | { | |
636dff67 SK |
1352 | gfc_error ("Initialization of allocatable component at %C is not " |
1353 | "allowed"); | |
5046aff5 PT |
1354 | m = MATCH_ERROR; |
1355 | goto cleanup; | |
1356 | } | |
1357 | ||
25d8f0a2 TS |
1358 | /* Check if we are parsing an enumeration and if the current enumerator |
1359 | variable has an initializer or not. If it does not have an | |
1360 | initializer, the initialization value of the previous enumerator | |
1361 | (stored in last_initializer) is incremented by 1 and is used to | |
1362 | initialize the current enumerator. */ | |
1363 | if (gfc_current_state () == COMP_ENUM) | |
1364 | { | |
1365 | if (initializer == NULL) | |
636dff67 | 1366 | initializer = gfc_enum_initializer (last_initializer, old_locus); |
25d8f0a2 TS |
1367 | |
1368 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) | |
636dff67 SK |
1369 | { |
1370 | gfc_error("ENUMERATOR %L not initialized with integer expression", | |
25d8f0a2 | 1371 | &var_locus); |
636dff67 SK |
1372 | m = MATCH_ERROR; |
1373 | gfc_free_enum_history (); | |
1374 | goto cleanup; | |
1375 | } | |
25d8f0a2 TS |
1376 | |
1377 | /* Store this current initializer, for the next enumerator | |
1378 | variable to be parsed. */ | |
1379 | last_initializer = initializer; | |
1380 | } | |
1381 | ||
54b4ba60 | 1382 | /* Add the initializer. Note that it is fine if initializer is |
6de9cd9a DN |
1383 | NULL here, because we sometimes also need to check if a |
1384 | declaration *must* have an initialization expression. */ | |
1385 | if (gfc_current_state () != COMP_DERIVED) | |
1386 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1387 | else | |
54b4ba60 | 1388 | { |
5046aff5 | 1389 | if (current_ts.type == BT_DERIVED |
636dff67 | 1390 | && !current_attr.pointer && !initializer) |
54b4ba60 PB |
1391 | initializer = gfc_default_initializer (¤t_ts); |
1392 | t = build_struct (name, cl, &initializer, &as); | |
1393 | } | |
6de9cd9a DN |
1394 | |
1395 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1396 | ||
1397 | cleanup: | |
1398 | /* Free stuff up and return. */ | |
1399 | gfc_free_expr (initializer); | |
1400 | gfc_free_array_spec (as); | |
1401 | ||
1402 | return m; | |
1403 | } | |
1404 | ||
1405 | ||
1406 | /* Match an extended-f77 kind specification. */ | |
1407 | ||
1408 | match | |
636dff67 | 1409 | gfc_match_old_kind_spec (gfc_typespec *ts) |
6de9cd9a DN |
1410 | { |
1411 | match m; | |
5cf54585 | 1412 | int original_kind; |
6de9cd9a DN |
1413 | |
1414 | if (gfc_match_char ('*') != MATCH_YES) | |
1415 | return MATCH_NO; | |
1416 | ||
5cf54585 | 1417 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
6de9cd9a DN |
1418 | if (m != MATCH_YES) |
1419 | return MATCH_ERROR; | |
1420 | ||
e45b3c75 ES |
1421 | original_kind = ts->kind; |
1422 | ||
6de9cd9a | 1423 | /* Massage the kind numbers for complex types. */ |
e45b3c75 ES |
1424 | if (ts->type == BT_COMPLEX) |
1425 | { | |
1426 | if (ts->kind % 2) | |
636dff67 SK |
1427 | { |
1428 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1429 | gfc_basic_typename (ts->type), original_kind); | |
1430 | return MATCH_ERROR; | |
1431 | } | |
e45b3c75 ES |
1432 | ts->kind /= 2; |
1433 | } | |
6de9cd9a | 1434 | |
e7a2d5fb | 1435 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a | 1436 | { |
e45b3c75 | 1437 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
636dff67 | 1438 | gfc_basic_typename (ts->type), original_kind); |
6de9cd9a DN |
1439 | return MATCH_ERROR; |
1440 | } | |
1441 | ||
df8652dc SK |
1442 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
1443 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1444 | return MATCH_ERROR; | |
1445 | ||
6de9cd9a DN |
1446 | return MATCH_YES; |
1447 | } | |
1448 | ||
1449 | ||
1450 | /* Match a kind specification. Since kinds are generally optional, we | |
1451 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1452 | string is found, then we know we have an error. */ | |
1453 | ||
1454 | match | |
636dff67 | 1455 | gfc_match_kind_spec (gfc_typespec *ts) |
6de9cd9a DN |
1456 | { |
1457 | locus where; | |
1458 | gfc_expr *e; | |
1459 | match m, n; | |
1460 | const char *msg; | |
1461 | ||
1462 | m = MATCH_NO; | |
1463 | e = NULL; | |
1464 | ||
63645982 | 1465 | where = gfc_current_locus; |
6de9cd9a DN |
1466 | |
1467 | if (gfc_match_char ('(') == MATCH_NO) | |
1468 | return MATCH_NO; | |
1469 | ||
1470 | /* Also gobbles optional text. */ | |
1471 | if (gfc_match (" kind = ") == MATCH_YES) | |
1472 | m = MATCH_ERROR; | |
1473 | ||
1474 | n = gfc_match_init_expr (&e); | |
1475 | if (n == MATCH_NO) | |
1476 | gfc_error ("Expected initialization expression at %C"); | |
1477 | if (n != MATCH_YES) | |
1478 | return MATCH_ERROR; | |
1479 | ||
1480 | if (e->rank != 0) | |
1481 | { | |
1482 | gfc_error ("Expected scalar initialization expression at %C"); | |
1483 | m = MATCH_ERROR; | |
1484 | goto no_match; | |
1485 | } | |
1486 | ||
1487 | msg = gfc_extract_int (e, &ts->kind); | |
1488 | if (msg != NULL) | |
1489 | { | |
1490 | gfc_error (msg); | |
1491 | m = MATCH_ERROR; | |
1492 | goto no_match; | |
1493 | } | |
1494 | ||
1495 | gfc_free_expr (e); | |
1496 | e = NULL; | |
1497 | ||
e7a2d5fb | 1498 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a DN |
1499 | { |
1500 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
1501 | gfc_basic_typename (ts->type)); | |
1502 | ||
1503 | m = MATCH_ERROR; | |
1504 | goto no_match; | |
1505 | } | |
1506 | ||
1507 | if (gfc_match_char (')') != MATCH_YES) | |
1508 | { | |
8998be20 | 1509 | gfc_error ("Missing right parenthesis at %C"); |
6de9cd9a DN |
1510 | goto no_match; |
1511 | } | |
1512 | ||
1513 | return MATCH_YES; | |
1514 | ||
1515 | no_match: | |
1516 | gfc_free_expr (e); | |
63645982 | 1517 | gfc_current_locus = where; |
6de9cd9a DN |
1518 | return m; |
1519 | } | |
1520 | ||
1521 | ||
1522 | /* Match the various kind/length specifications in a CHARACTER | |
1523 | declaration. We don't return MATCH_NO. */ | |
1524 | ||
1525 | static match | |
636dff67 | 1526 | match_char_spec (gfc_typespec *ts) |
6de9cd9a DN |
1527 | { |
1528 | int i, kind, seen_length; | |
1529 | gfc_charlen *cl; | |
1530 | gfc_expr *len; | |
1531 | match m; | |
1532 | ||
9d64df18 | 1533 | kind = gfc_default_character_kind; |
6de9cd9a DN |
1534 | len = NULL; |
1535 | seen_length = 0; | |
1536 | ||
1537 | /* Try the old-style specification first. */ | |
1538 | old_char_selector = 0; | |
1539 | ||
1540 | m = match_char_length (&len); | |
1541 | if (m != MATCH_NO) | |
1542 | { | |
1543 | if (m == MATCH_YES) | |
1544 | old_char_selector = 1; | |
1545 | seen_length = 1; | |
1546 | goto done; | |
1547 | } | |
1548 | ||
1549 | m = gfc_match_char ('('); | |
1550 | if (m != MATCH_YES) | |
1551 | { | |
1552 | m = MATCH_YES; /* character without length is a single char */ | |
1553 | goto done; | |
1554 | } | |
1555 | ||
1556 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ) */ | |
1557 | if (gfc_match (" kind =") == MATCH_YES) | |
1558 | { | |
1559 | m = gfc_match_small_int (&kind); | |
1560 | if (m == MATCH_ERROR) | |
1561 | goto done; | |
1562 | if (m == MATCH_NO) | |
1563 | goto syntax; | |
1564 | ||
1565 | if (gfc_match (" , len =") == MATCH_NO) | |
1566 | goto rparen; | |
1567 | ||
1568 | m = char_len_param_value (&len); | |
1569 | if (m == MATCH_NO) | |
1570 | goto syntax; | |
1571 | if (m == MATCH_ERROR) | |
1572 | goto done; | |
1573 | seen_length = 1; | |
1574 | ||
1575 | goto rparen; | |
1576 | } | |
1577 | ||
636dff67 | 1578 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>" */ |
6de9cd9a DN |
1579 | if (gfc_match (" len =") == MATCH_YES) |
1580 | { | |
1581 | m = char_len_param_value (&len); | |
1582 | if (m == MATCH_NO) | |
1583 | goto syntax; | |
1584 | if (m == MATCH_ERROR) | |
1585 | goto done; | |
1586 | seen_length = 1; | |
1587 | ||
1588 | if (gfc_match_char (')') == MATCH_YES) | |
1589 | goto done; | |
1590 | ||
1591 | if (gfc_match (" , kind =") != MATCH_YES) | |
1592 | goto syntax; | |
1593 | ||
1594 | gfc_match_small_int (&kind); | |
1595 | ||
e7a2d5fb | 1596 | if (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 | return MATCH_YES; | |
1600 | } | |
1601 | ||
1602 | goto rparen; | |
1603 | } | |
1604 | ||
1605 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ) */ | |
1606 | m = char_len_param_value (&len); | |
1607 | if (m == MATCH_NO) | |
1608 | goto syntax; | |
1609 | if (m == MATCH_ERROR) | |
1610 | goto done; | |
1611 | seen_length = 1; | |
1612 | ||
1613 | m = gfc_match_char (')'); | |
1614 | if (m == MATCH_YES) | |
1615 | goto done; | |
1616 | ||
1617 | if (gfc_match_char (',') != MATCH_YES) | |
1618 | goto syntax; | |
1619 | ||
1620 | gfc_match (" kind ="); /* Gobble optional text */ | |
1621 | ||
1622 | m = gfc_match_small_int (&kind); | |
1623 | if (m == MATCH_ERROR) | |
1624 | goto done; | |
1625 | if (m == MATCH_NO) | |
1626 | goto syntax; | |
1627 | ||
1628 | rparen: | |
1629 | /* Require a right-paren at this point. */ | |
1630 | m = gfc_match_char (')'); | |
1631 | if (m == MATCH_YES) | |
1632 | goto done; | |
1633 | ||
1634 | syntax: | |
1635 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
1636 | m = MATCH_ERROR; | |
1637 | ||
1638 | done: | |
e7a2d5fb | 1639 | if (m == MATCH_YES && gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
6de9cd9a DN |
1640 | { |
1641 | gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); | |
1642 | m = MATCH_ERROR; | |
1643 | } | |
1644 | ||
1645 | if (m != MATCH_YES) | |
1646 | { | |
1647 | gfc_free_expr (len); | |
1648 | return m; | |
1649 | } | |
1650 | ||
1651 | /* Do some final massaging of the length values. */ | |
1652 | cl = gfc_get_charlen (); | |
1653 | cl->next = gfc_current_ns->cl_list; | |
1654 | gfc_current_ns->cl_list = cl; | |
1655 | ||
1656 | if (seen_length == 0) | |
1657 | cl->length = gfc_int_expr (1); | |
1658 | else | |
1659 | { | |
1660 | if (len == NULL || gfc_extract_int (len, &i) != NULL || i >= 0) | |
1661 | cl->length = len; | |
1662 | else | |
1663 | { | |
1664 | gfc_free_expr (len); | |
1665 | cl->length = gfc_int_expr (0); | |
1666 | } | |
1667 | } | |
1668 | ||
1669 | ts->cl = cl; | |
1670 | ts->kind = kind; | |
1671 | ||
1672 | return MATCH_YES; | |
1673 | } | |
1674 | ||
1675 | ||
1676 | /* Matches a type specification. If successful, sets the ts structure | |
1677 | to the matched specification. This is necessary for FUNCTION and | |
1678 | IMPLICIT statements. | |
1679 | ||
e5ddaa24 TS |
1680 | If implicit_flag is nonzero, then we don't check for the optional |
1681 | kind specification. Not doing so is needed for matching an IMPLICIT | |
6de9cd9a DN |
1682 | statement correctly. */ |
1683 | ||
e5ddaa24 | 1684 | static match |
636dff67 | 1685 | match_type_spec (gfc_typespec *ts, int implicit_flag) |
6de9cd9a DN |
1686 | { |
1687 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1688 | gfc_symbol *sym; | |
1689 | match m; | |
0ff0dfbf | 1690 | int c; |
6de9cd9a DN |
1691 | |
1692 | gfc_clear_ts (ts); | |
1693 | ||
5f700e6d AL |
1694 | if (gfc_match (" byte") == MATCH_YES) |
1695 | { | |
1696 | if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C") | |
1697 | == FAILURE) | |
1698 | return MATCH_ERROR; | |
1699 | ||
1700 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
1701 | { | |
1702 | gfc_error ("BYTE type used at %C " | |
1703 | "is not available on the target machine"); | |
1704 | return MATCH_ERROR; | |
1705 | } | |
1706 | ||
1707 | ts->type = BT_INTEGER; | |
1708 | ts->kind = 1; | |
1709 | return MATCH_YES; | |
1710 | } | |
1711 | ||
6de9cd9a DN |
1712 | if (gfc_match (" integer") == MATCH_YES) |
1713 | { | |
1714 | ts->type = BT_INTEGER; | |
9d64df18 | 1715 | ts->kind = gfc_default_integer_kind; |
6de9cd9a DN |
1716 | goto get_kind; |
1717 | } | |
1718 | ||
1719 | if (gfc_match (" character") == MATCH_YES) | |
1720 | { | |
1721 | ts->type = BT_CHARACTER; | |
e5ddaa24 TS |
1722 | if (implicit_flag == 0) |
1723 | return match_char_spec (ts); | |
1724 | else | |
1725 | return MATCH_YES; | |
6de9cd9a DN |
1726 | } |
1727 | ||
1728 | if (gfc_match (" real") == MATCH_YES) | |
1729 | { | |
1730 | ts->type = BT_REAL; | |
9d64df18 | 1731 | ts->kind = gfc_default_real_kind; |
6de9cd9a DN |
1732 | goto get_kind; |
1733 | } | |
1734 | ||
1735 | if (gfc_match (" double precision") == MATCH_YES) | |
1736 | { | |
1737 | ts->type = BT_REAL; | |
9d64df18 | 1738 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
1739 | return MATCH_YES; |
1740 | } | |
1741 | ||
1742 | if (gfc_match (" complex") == MATCH_YES) | |
1743 | { | |
1744 | ts->type = BT_COMPLEX; | |
9d64df18 | 1745 | ts->kind = gfc_default_complex_kind; |
6de9cd9a DN |
1746 | goto get_kind; |
1747 | } | |
1748 | ||
1749 | if (gfc_match (" double complex") == MATCH_YES) | |
1750 | { | |
df8652dc SK |
1751 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
1752 | "conform to the Fortran 95 standard") == FAILURE) | |
1753 | return MATCH_ERROR; | |
1754 | ||
6de9cd9a | 1755 | ts->type = BT_COMPLEX; |
9d64df18 | 1756 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
1757 | return MATCH_YES; |
1758 | } | |
1759 | ||
1760 | if (gfc_match (" logical") == MATCH_YES) | |
1761 | { | |
1762 | ts->type = BT_LOGICAL; | |
9d64df18 | 1763 | ts->kind = gfc_default_logical_kind; |
6de9cd9a DN |
1764 | goto get_kind; |
1765 | } | |
1766 | ||
1767 | m = gfc_match (" type ( %n )", name); | |
1768 | if (m != MATCH_YES) | |
1769 | return m; | |
1770 | ||
1771 | /* Search for the name but allow the components to be defined later. */ | |
1772 | if (gfc_get_ha_symbol (name, &sym)) | |
1773 | { | |
1774 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
1775 | return MATCH_ERROR; | |
1776 | } | |
1777 | ||
1778 | if (sym->attr.flavor != FL_DERIVED | |
231b2fcc | 1779 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
1780 | return MATCH_ERROR; |
1781 | ||
1782 | ts->type = BT_DERIVED; | |
1783 | ts->kind = 0; | |
1784 | ts->derived = sym; | |
1785 | ||
1786 | return MATCH_YES; | |
1787 | ||
1788 | get_kind: | |
1789 | /* For all types except double, derived and character, look for an | |
1790 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
e5ddaa24 | 1791 | if (implicit_flag == 1) |
6de9cd9a DN |
1792 | return MATCH_YES; |
1793 | ||
0ff0dfbf TS |
1794 | if (gfc_current_form == FORM_FREE) |
1795 | { | |
1796 | c = gfc_peek_char(); | |
1797 | if (!gfc_is_whitespace(c) && c != '*' && c != '(' | |
636dff67 | 1798 | && c != ':' && c != ',') |
0ff0dfbf TS |
1799 | return MATCH_NO; |
1800 | } | |
1801 | ||
6de9cd9a DN |
1802 | m = gfc_match_kind_spec (ts); |
1803 | if (m == MATCH_NO && ts->type != BT_CHARACTER) | |
1804 | m = gfc_match_old_kind_spec (ts); | |
1805 | ||
1806 | if (m == MATCH_NO) | |
1807 | m = MATCH_YES; /* No kind specifier found. */ | |
1808 | ||
1809 | return m; | |
1810 | } | |
1811 | ||
1812 | ||
e5ddaa24 TS |
1813 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
1814 | already matched in parse.c, or we would not end up here in the | |
1815 | first place. So the only thing we need to check, is if there is | |
1816 | trailing garbage. If not, the match is successful. */ | |
1817 | ||
1818 | match | |
1819 | gfc_match_implicit_none (void) | |
1820 | { | |
e5ddaa24 TS |
1821 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
1822 | } | |
1823 | ||
1824 | ||
1825 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
1826 | ||
1827 | static match | |
1107b970 | 1828 | match_implicit_range (void) |
e5ddaa24 TS |
1829 | { |
1830 | int c, c1, c2, inner; | |
1831 | locus cur_loc; | |
1832 | ||
1833 | cur_loc = gfc_current_locus; | |
1834 | ||
1835 | gfc_gobble_whitespace (); | |
1836 | c = gfc_next_char (); | |
1837 | if (c != '(') | |
1838 | { | |
1839 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
1840 | goto bad; | |
1841 | } | |
1842 | ||
1843 | inner = 1; | |
1844 | while (inner) | |
1845 | { | |
1846 | gfc_gobble_whitespace (); | |
1847 | c1 = gfc_next_char (); | |
1848 | if (!ISALPHA (c1)) | |
1849 | goto bad; | |
1850 | ||
1851 | gfc_gobble_whitespace (); | |
1852 | c = gfc_next_char (); | |
1853 | ||
1854 | switch (c) | |
1855 | { | |
1856 | case ')': | |
1857 | inner = 0; /* Fall through */ | |
1858 | ||
1859 | case ',': | |
1860 | c2 = c1; | |
1861 | break; | |
1862 | ||
1863 | case '-': | |
1864 | gfc_gobble_whitespace (); | |
1865 | c2 = gfc_next_char (); | |
1866 | if (!ISALPHA (c2)) | |
1867 | goto bad; | |
1868 | ||
1869 | gfc_gobble_whitespace (); | |
1870 | c = gfc_next_char (); | |
1871 | ||
1872 | if ((c != ',') && (c != ')')) | |
1873 | goto bad; | |
1874 | if (c == ')') | |
1875 | inner = 0; | |
1876 | ||
1877 | break; | |
1878 | ||
1879 | default: | |
1880 | goto bad; | |
1881 | } | |
1882 | ||
1883 | if (c1 > c2) | |
1884 | { | |
1885 | gfc_error ("Letters must be in alphabetic order in " | |
1886 | "IMPLICIT statement at %C"); | |
1887 | goto bad; | |
1888 | } | |
1889 | ||
1890 | /* See if we can add the newly matched range to the pending | |
636dff67 SK |
1891 | implicits from this IMPLICIT statement. We do not check for |
1892 | conflicts with whatever earlier IMPLICIT statements may have | |
1893 | set. This is done when we've successfully finished matching | |
1894 | the current one. */ | |
1107b970 | 1895 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
e5ddaa24 TS |
1896 | goto bad; |
1897 | } | |
1898 | ||
1899 | return MATCH_YES; | |
1900 | ||
1901 | bad: | |
1902 | gfc_syntax_error (ST_IMPLICIT); | |
1903 | ||
1904 | gfc_current_locus = cur_loc; | |
1905 | return MATCH_ERROR; | |
1906 | } | |
1907 | ||
1908 | ||
1909 | /* Match an IMPLICIT statement, storing the types for | |
1910 | gfc_set_implicit() if the statement is accepted by the parser. | |
1911 | There is a strange looking, but legal syntactic construction | |
1912 | possible. It looks like: | |
1913 | ||
1914 | IMPLICIT INTEGER (a-b) (c-d) | |
1915 | ||
1916 | This is legal if "a-b" is a constant expression that happens to | |
1917 | equal one of the legal kinds for integers. The real problem | |
1918 | happens with an implicit specification that looks like: | |
1919 | ||
1920 | IMPLICIT INTEGER (a-b) | |
1921 | ||
1922 | In this case, a typespec matcher that is "greedy" (as most of the | |
1923 | matchers are) gobbles the character range as a kindspec, leaving | |
1924 | nothing left. We therefore have to go a bit more slowly in the | |
1925 | matching process by inhibiting the kindspec checking during | |
1926 | typespec matching and checking for a kind later. */ | |
1927 | ||
1928 | match | |
1929 | gfc_match_implicit (void) | |
1930 | { | |
1931 | gfc_typespec ts; | |
1932 | locus cur_loc; | |
1933 | int c; | |
1934 | match m; | |
1935 | ||
1936 | /* We don't allow empty implicit statements. */ | |
1937 | if (gfc_match_eos () == MATCH_YES) | |
1938 | { | |
1939 | gfc_error ("Empty IMPLICIT statement at %C"); | |
1940 | return MATCH_ERROR; | |
1941 | } | |
1942 | ||
e5ddaa24 TS |
1943 | do |
1944 | { | |
1107b970 PB |
1945 | /* First cleanup. */ |
1946 | gfc_clear_new_implicit (); | |
1947 | ||
e5ddaa24 TS |
1948 | /* A basic type is mandatory here. */ |
1949 | m = match_type_spec (&ts, 1); | |
1950 | if (m == MATCH_ERROR) | |
1951 | goto error; | |
1952 | if (m == MATCH_NO) | |
1953 | goto syntax; | |
1954 | ||
1955 | cur_loc = gfc_current_locus; | |
1107b970 | 1956 | m = match_implicit_range (); |
e5ddaa24 TS |
1957 | |
1958 | if (m == MATCH_YES) | |
1959 | { | |
1107b970 | 1960 | /* We may have <TYPE> (<RANGE>). */ |
e5ddaa24 TS |
1961 | gfc_gobble_whitespace (); |
1962 | c = gfc_next_char (); | |
1963 | if ((c == '\n') || (c == ',')) | |
1107b970 PB |
1964 | { |
1965 | /* Check for CHARACTER with no length parameter. */ | |
1966 | if (ts.type == BT_CHARACTER && !ts.cl) | |
1967 | { | |
9d64df18 | 1968 | ts.kind = gfc_default_character_kind; |
1107b970 PB |
1969 | ts.cl = gfc_get_charlen (); |
1970 | ts.cl->next = gfc_current_ns->cl_list; | |
1971 | gfc_current_ns->cl_list = ts.cl; | |
1972 | ts.cl->length = gfc_int_expr (1); | |
1973 | } | |
1974 | ||
1975 | /* Record the Successful match. */ | |
1976 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
1977 | return MATCH_ERROR; | |
1978 | continue; | |
1979 | } | |
e5ddaa24 TS |
1980 | |
1981 | gfc_current_locus = cur_loc; | |
1982 | } | |
1983 | ||
1107b970 PB |
1984 | /* Discard the (incorrectly) matched range. */ |
1985 | gfc_clear_new_implicit (); | |
1986 | ||
1987 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
1988 | if (ts.type == BT_CHARACTER) | |
1989 | m = match_char_spec (&ts); | |
1990 | else | |
e5ddaa24 | 1991 | { |
1107b970 | 1992 | m = gfc_match_kind_spec (&ts); |
e5ddaa24 | 1993 | if (m == MATCH_NO) |
1107b970 PB |
1994 | { |
1995 | m = gfc_match_old_kind_spec (&ts); | |
1996 | if (m == MATCH_ERROR) | |
1997 | goto error; | |
1998 | if (m == MATCH_NO) | |
1999 | goto syntax; | |
2000 | } | |
e5ddaa24 | 2001 | } |
1107b970 PB |
2002 | if (m == MATCH_ERROR) |
2003 | goto error; | |
e5ddaa24 | 2004 | |
1107b970 | 2005 | m = match_implicit_range (); |
e5ddaa24 TS |
2006 | if (m == MATCH_ERROR) |
2007 | goto error; | |
2008 | if (m == MATCH_NO) | |
2009 | goto syntax; | |
2010 | ||
2011 | gfc_gobble_whitespace (); | |
2012 | c = gfc_next_char (); | |
2013 | if ((c != '\n') && (c != ',')) | |
2014 | goto syntax; | |
2015 | ||
1107b970 PB |
2016 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2017 | return MATCH_ERROR; | |
e5ddaa24 TS |
2018 | } |
2019 | while (c == ','); | |
2020 | ||
1107b970 | 2021 | return MATCH_YES; |
e5ddaa24 TS |
2022 | |
2023 | syntax: | |
2024 | gfc_syntax_error (ST_IMPLICIT); | |
2025 | ||
2026 | error: | |
2027 | return MATCH_ERROR; | |
2028 | } | |
2029 | ||
8998be20 TB |
2030 | match |
2031 | gfc_match_import (void) | |
2032 | { | |
2033 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2034 | match m; | |
2035 | gfc_symbol *sym; | |
2036 | gfc_symtree *st; | |
2037 | ||
2038 | if (gfc_current_ns->proc_name == NULL || | |
2039 | gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
2040 | { | |
2041 | gfc_error ("IMPORT statement at %C only permitted in " | |
2042 | "an INTERFACE body"); | |
2043 | return MATCH_ERROR; | |
2044 | } | |
2045 | ||
636dff67 | 2046 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
8998be20 TB |
2047 | == FAILURE) |
2048 | return MATCH_ERROR; | |
2049 | ||
2050 | if (gfc_match_eos () == MATCH_YES) | |
2051 | { | |
2052 | /* All host variables should be imported. */ | |
2053 | gfc_current_ns->has_import_set = 1; | |
2054 | return MATCH_YES; | |
2055 | } | |
2056 | ||
2057 | if (gfc_match (" ::") == MATCH_YES) | |
2058 | { | |
2059 | if (gfc_match_eos () == MATCH_YES) | |
636dff67 SK |
2060 | { |
2061 | gfc_error ("Expecting list of named entities at %C"); | |
2062 | return MATCH_ERROR; | |
2063 | } | |
8998be20 TB |
2064 | } |
2065 | ||
2066 | for(;;) | |
2067 | { | |
2068 | m = gfc_match (" %n", name); | |
2069 | switch (m) | |
2070 | { | |
2071 | case MATCH_YES: | |
636dff67 SK |
2072 | if (gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
2073 | { | |
2074 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2075 | return MATCH_ERROR; | |
2076 | } | |
2077 | ||
2078 | if (sym == NULL) | |
2079 | { | |
2080 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2081 | "at %C - does not exist.", name); | |
2082 | return MATCH_ERROR; | |
2083 | } | |
2084 | ||
2085 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) | |
2086 | { | |
2087 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2088 | "at %C.", name); | |
2089 | goto next_item; | |
2090 | } | |
2091 | ||
2092 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
2093 | st->n.sym = sym; | |
2094 | sym->refs++; | |
2095 | sym->ns = gfc_current_ns; | |
8998be20 TB |
2096 | |
2097 | goto next_item; | |
2098 | ||
2099 | case MATCH_NO: | |
2100 | break; | |
2101 | ||
2102 | case MATCH_ERROR: | |
2103 | return MATCH_ERROR; | |
2104 | } | |
2105 | ||
2106 | next_item: | |
2107 | if (gfc_match_eos () == MATCH_YES) | |
2108 | break; | |
2109 | if (gfc_match_char (',') != MATCH_YES) | |
2110 | goto syntax; | |
2111 | } | |
2112 | ||
2113 | return MATCH_YES; | |
2114 | ||
2115 | syntax: | |
2116 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2117 | return MATCH_ERROR; | |
2118 | } | |
e5ddaa24 | 2119 | |
6de9cd9a DN |
2120 | /* Matches an attribute specification including array specs. If |
2121 | successful, leaves the variables current_attr and current_as | |
2122 | holding the specification. Also sets the colon_seen variable for | |
2123 | later use by matchers associated with initializations. | |
2124 | ||
2125 | This subroutine is a little tricky in the sense that we don't know | |
2126 | if we really have an attr-spec until we hit the double colon. | |
2127 | Until that time, we can only return MATCH_NO. This forces us to | |
2128 | check for duplicate specification at this level. */ | |
2129 | ||
2130 | static match | |
2131 | match_attr_spec (void) | |
2132 | { | |
6de9cd9a DN |
2133 | /* Modifiers that can exist in a type statement. */ |
2134 | typedef enum | |
2135 | { GFC_DECL_BEGIN = 0, | |
2136 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
2137 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
ee7e677f TB |
2138 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
2139 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
2140 | DECL_COLON, DECL_NONE, | |
6de9cd9a DN |
2141 | GFC_DECL_END /* Sentinel */ |
2142 | } | |
2143 | decl_types; | |
2144 | ||
2145 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
2146 | #define NUM_DECL GFC_DECL_END | |
2147 | ||
2148 | static mstring decls[] = { | |
2149 | minit (", allocatable", DECL_ALLOCATABLE), | |
2150 | minit (", dimension", DECL_DIMENSION), | |
2151 | minit (", external", DECL_EXTERNAL), | |
2152 | minit (", intent ( in )", DECL_IN), | |
2153 | minit (", intent ( out )", DECL_OUT), | |
2154 | minit (", intent ( in out )", DECL_INOUT), | |
2155 | minit (", intrinsic", DECL_INTRINSIC), | |
2156 | minit (", optional", DECL_OPTIONAL), | |
2157 | minit (", parameter", DECL_PARAMETER), | |
2158 | minit (", pointer", DECL_POINTER), | |
ee7e677f | 2159 | minit (", protected", DECL_PROTECTED), |
6de9cd9a DN |
2160 | minit (", private", DECL_PRIVATE), |
2161 | minit (", public", DECL_PUBLIC), | |
2162 | minit (", save", DECL_SAVE), | |
2163 | minit (", target", DECL_TARGET), | |
06469efd | 2164 | minit (", value", DECL_VALUE), |
775e6c3a | 2165 | minit (", volatile", DECL_VOLATILE), |
6de9cd9a DN |
2166 | minit ("::", DECL_COLON), |
2167 | minit (NULL, DECL_NONE) | |
2168 | }; | |
2169 | ||
2170 | locus start, seen_at[NUM_DECL]; | |
2171 | int seen[NUM_DECL]; | |
2172 | decl_types d; | |
2173 | const char *attr; | |
2174 | match m; | |
2175 | try t; | |
2176 | ||
2177 | gfc_clear_attr (¤t_attr); | |
63645982 | 2178 | start = gfc_current_locus; |
6de9cd9a DN |
2179 | |
2180 | current_as = NULL; | |
2181 | colon_seen = 0; | |
2182 | ||
2183 | /* See if we get all of the keywords up to the final double colon. */ | |
2184 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2185 | seen[d] = 0; | |
2186 | ||
2187 | for (;;) | |
2188 | { | |
2189 | d = (decl_types) gfc_match_strings (decls); | |
2190 | if (d == DECL_NONE || d == DECL_COLON) | |
2191 | break; | |
25d8f0a2 TS |
2192 | |
2193 | if (gfc_current_state () == COMP_ENUM) | |
636dff67 SK |
2194 | { |
2195 | gfc_error ("Enumerator cannot have attributes %C"); | |
2196 | return MATCH_ERROR; | |
2197 | } | |
6de9cd9a DN |
2198 | |
2199 | seen[d]++; | |
63645982 | 2200 | seen_at[d] = gfc_current_locus; |
6de9cd9a DN |
2201 | |
2202 | if (d == DECL_DIMENSION) | |
2203 | { | |
2204 | m = gfc_match_array_spec (¤t_as); | |
2205 | ||
2206 | if (m == MATCH_NO) | |
2207 | { | |
2208 | gfc_error ("Missing dimension specification at %C"); | |
2209 | m = MATCH_ERROR; | |
2210 | } | |
2211 | ||
2212 | if (m == MATCH_ERROR) | |
2213 | goto cleanup; | |
2214 | } | |
2215 | } | |
2216 | ||
831d7813 | 2217 | /* If we are parsing an enumeration and have ensured that no other |
25d8f0a2 TS |
2218 | attributes are present we can now set the parameter attribute. */ |
2219 | if (gfc_current_state () == COMP_ENUM) | |
2220 | { | |
2221 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
2222 | if (t == FAILURE) | |
636dff67 SK |
2223 | { |
2224 | m = MATCH_ERROR; | |
2225 | goto cleanup; | |
2226 | } | |
25d8f0a2 TS |
2227 | } |
2228 | ||
6de9cd9a DN |
2229 | /* No double colon, so assume that we've been looking at something |
2230 | else the whole time. */ | |
2231 | if (d == DECL_NONE) | |
2232 | { | |
2233 | m = MATCH_NO; | |
2234 | goto cleanup; | |
2235 | } | |
2236 | ||
2237 | /* Since we've seen a double colon, we have to be looking at an | |
2238 | attr-spec. This means that we can now issue errors. */ | |
2239 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2240 | if (seen[d] > 1) | |
2241 | { | |
2242 | switch (d) | |
2243 | { | |
2244 | case DECL_ALLOCATABLE: | |
2245 | attr = "ALLOCATABLE"; | |
2246 | break; | |
2247 | case DECL_DIMENSION: | |
2248 | attr = "DIMENSION"; | |
2249 | break; | |
2250 | case DECL_EXTERNAL: | |
2251 | attr = "EXTERNAL"; | |
2252 | break; | |
2253 | case DECL_IN: | |
2254 | attr = "INTENT (IN)"; | |
2255 | break; | |
2256 | case DECL_OUT: | |
2257 | attr = "INTENT (OUT)"; | |
2258 | break; | |
2259 | case DECL_INOUT: | |
2260 | attr = "INTENT (IN OUT)"; | |
2261 | break; | |
2262 | case DECL_INTRINSIC: | |
2263 | attr = "INTRINSIC"; | |
2264 | break; | |
2265 | case DECL_OPTIONAL: | |
2266 | attr = "OPTIONAL"; | |
2267 | break; | |
2268 | case DECL_PARAMETER: | |
2269 | attr = "PARAMETER"; | |
2270 | break; | |
2271 | case DECL_POINTER: | |
2272 | attr = "POINTER"; | |
2273 | break; | |
ee7e677f TB |
2274 | case DECL_PROTECTED: |
2275 | attr = "PROTECTED"; | |
2276 | break; | |
6de9cd9a DN |
2277 | case DECL_PRIVATE: |
2278 | attr = "PRIVATE"; | |
2279 | break; | |
2280 | case DECL_PUBLIC: | |
2281 | attr = "PUBLIC"; | |
2282 | break; | |
2283 | case DECL_SAVE: | |
2284 | attr = "SAVE"; | |
2285 | break; | |
2286 | case DECL_TARGET: | |
2287 | attr = "TARGET"; | |
2288 | break; | |
06469efd PT |
2289 | case DECL_VALUE: |
2290 | attr = "VALUE"; | |
2291 | break; | |
775e6c3a TB |
2292 | case DECL_VOLATILE: |
2293 | attr = "VOLATILE"; | |
2294 | break; | |
6de9cd9a DN |
2295 | default: |
2296 | attr = NULL; /* This shouldn't happen */ | |
2297 | } | |
2298 | ||
2299 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
2300 | m = MATCH_ERROR; | |
2301 | goto cleanup; | |
2302 | } | |
2303 | ||
2304 | /* Now that we've dealt with duplicate attributes, add the attributes | |
2305 | to the current attribute. */ | |
2306 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2307 | { | |
2308 | if (seen[d] == 0) | |
2309 | continue; | |
2310 | ||
2311 | if (gfc_current_state () == COMP_DERIVED | |
2312 | && d != DECL_DIMENSION && d != DECL_POINTER | |
2313 | && d != DECL_COLON && d != DECL_NONE) | |
2314 | { | |
5046aff5 PT |
2315 | if (d == DECL_ALLOCATABLE) |
2316 | { | |
636dff67 SK |
2317 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
2318 | "attribute at %C in a TYPE definition") | |
2319 | == FAILURE) | |
5046aff5 PT |
2320 | { |
2321 | m = MATCH_ERROR; | |
2322 | goto cleanup; | |
2323 | } | |
636dff67 SK |
2324 | } |
2325 | else | |
5046aff5 PT |
2326 | { |
2327 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
2328 | &seen_at[d]); | |
2329 | m = MATCH_ERROR; | |
2330 | goto cleanup; | |
2331 | } | |
6de9cd9a DN |
2332 | } |
2333 | ||
4213f93b | 2334 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
636dff67 | 2335 | && gfc_current_state () != COMP_MODULE) |
4213f93b PT |
2336 | { |
2337 | if (d == DECL_PRIVATE) | |
2338 | attr = "PRIVATE"; | |
2339 | else | |
2340 | attr = "PUBLIC"; | |
2341 | ||
2342 | gfc_error ("%s attribute at %L is not allowed outside of a MODULE", | |
2343 | attr, &seen_at[d]); | |
2344 | m = MATCH_ERROR; | |
2345 | goto cleanup; | |
2346 | } | |
2347 | ||
6de9cd9a DN |
2348 | switch (d) |
2349 | { | |
2350 | case DECL_ALLOCATABLE: | |
2351 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
2352 | break; | |
2353 | ||
2354 | case DECL_DIMENSION: | |
231b2fcc | 2355 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
2356 | break; |
2357 | ||
2358 | case DECL_EXTERNAL: | |
2359 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
2360 | break; | |
2361 | ||
2362 | case DECL_IN: | |
2363 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
2364 | break; | |
2365 | ||
2366 | case DECL_OUT: | |
2367 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
2368 | break; | |
2369 | ||
2370 | case DECL_INOUT: | |
2371 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
2372 | break; | |
2373 | ||
2374 | case DECL_INTRINSIC: | |
2375 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
2376 | break; | |
2377 | ||
2378 | case DECL_OPTIONAL: | |
2379 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
2380 | break; | |
2381 | ||
2382 | case DECL_PARAMETER: | |
231b2fcc | 2383 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
6de9cd9a DN |
2384 | break; |
2385 | ||
2386 | case DECL_POINTER: | |
2387 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
2388 | break; | |
2389 | ||
ee7e677f TB |
2390 | case DECL_PROTECTED: |
2391 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
2392 | { | |
2393 | gfc_error ("PROTECTED at %C only allowed in specification " | |
2394 | "part of a module"); | |
2395 | t = FAILURE; | |
2396 | break; | |
2397 | } | |
2398 | ||
636dff67 SK |
2399 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
2400 | "attribute at %C") | |
ee7e677f TB |
2401 | == FAILURE) |
2402 | t = FAILURE; | |
2403 | else | |
2404 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
2405 | break; | |
2406 | ||
6de9cd9a | 2407 | case DECL_PRIVATE: |
231b2fcc TS |
2408 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
2409 | &seen_at[d]); | |
6de9cd9a DN |
2410 | break; |
2411 | ||
2412 | case DECL_PUBLIC: | |
231b2fcc TS |
2413 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
2414 | &seen_at[d]); | |
6de9cd9a DN |
2415 | break; |
2416 | ||
2417 | case DECL_SAVE: | |
231b2fcc | 2418 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
2419 | break; |
2420 | ||
2421 | case DECL_TARGET: | |
2422 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
2423 | break; | |
2424 | ||
06469efd | 2425 | case DECL_VALUE: |
636dff67 SK |
2426 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
2427 | "at %C") | |
06469efd PT |
2428 | == FAILURE) |
2429 | t = FAILURE; | |
2430 | else | |
2431 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
2432 | break; | |
2433 | ||
775e6c3a TB |
2434 | case DECL_VOLATILE: |
2435 | if (gfc_notify_std (GFC_STD_F2003, | |
636dff67 | 2436 | "Fortran 2003: VOLATILE attribute at %C") |
775e6c3a TB |
2437 | == FAILURE) |
2438 | t = FAILURE; | |
2439 | else | |
2440 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
2441 | break; | |
2442 | ||
6de9cd9a DN |
2443 | default: |
2444 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
2445 | } | |
2446 | ||
2447 | if (t == FAILURE) | |
2448 | { | |
2449 | m = MATCH_ERROR; | |
2450 | goto cleanup; | |
2451 | } | |
2452 | } | |
2453 | ||
2454 | colon_seen = 1; | |
2455 | return MATCH_YES; | |
2456 | ||
2457 | cleanup: | |
63645982 | 2458 | gfc_current_locus = start; |
6de9cd9a DN |
2459 | gfc_free_array_spec (current_as); |
2460 | current_as = NULL; | |
2461 | return m; | |
2462 | } | |
2463 | ||
2464 | ||
2465 | /* Match a data declaration statement. */ | |
2466 | ||
2467 | match | |
2468 | gfc_match_data_decl (void) | |
2469 | { | |
2470 | gfc_symbol *sym; | |
2471 | match m; | |
949d5b72 | 2472 | int elem; |
6de9cd9a | 2473 | |
e5ddaa24 | 2474 | m = match_type_spec (¤t_ts, 0); |
6de9cd9a DN |
2475 | if (m != MATCH_YES) |
2476 | return m; | |
2477 | ||
2478 | if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) | |
2479 | { | |
2480 | sym = gfc_use_derived (current_ts.derived); | |
2481 | ||
2482 | if (sym == NULL) | |
2483 | { | |
2484 | m = MATCH_ERROR; | |
2485 | goto cleanup; | |
2486 | } | |
2487 | ||
2488 | current_ts.derived = sym; | |
2489 | } | |
2490 | ||
2491 | m = match_attr_spec (); | |
2492 | if (m == MATCH_ERROR) | |
2493 | { | |
2494 | m = MATCH_NO; | |
2495 | goto cleanup; | |
2496 | } | |
2497 | ||
2498 | if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL) | |
2499 | { | |
2500 | ||
2501 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
2502 | goto ok; | |
2503 | ||
976e21f6 | 2504 | gfc_find_symbol (current_ts.derived->name, |
636dff67 | 2505 | current_ts.derived->ns->parent, 1, &sym); |
6de9cd9a | 2506 | |
976e21f6 | 2507 | /* Any symbol that we find had better be a type definition |
636dff67 | 2508 | which has its components defined. */ |
976e21f6 | 2509 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
636dff67 | 2510 | && current_ts.derived->components != NULL) |
6de9cd9a DN |
2511 | goto ok; |
2512 | ||
976e21f6 PT |
2513 | /* Now we have an error, which we signal, and then fix up |
2514 | because the knock-on is plain and simple confusing. */ | |
2515 | gfc_error_now ("Derived type at %C has not been previously defined " | |
636dff67 | 2516 | "and so cannot appear in a derived type definition"); |
976e21f6 PT |
2517 | current_attr.pointer = 1; |
2518 | goto ok; | |
6de9cd9a DN |
2519 | } |
2520 | ||
2521 | ok: | |
2522 | /* If we have an old-style character declaration, and no new-style | |
2523 | attribute specifications, then there a comma is optional between | |
2524 | the type specification and the variable list. */ | |
2525 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
2526 | gfc_match_char (','); | |
2527 | ||
949d5b72 PT |
2528 | /* Give the types/attributes to symbols that follow. Give the element |
2529 | a number so that repeat character length expressions can be copied. */ | |
2530 | elem = 1; | |
6de9cd9a DN |
2531 | for (;;) |
2532 | { | |
949d5b72 | 2533 | m = variable_decl (elem++); |
6de9cd9a DN |
2534 | if (m == MATCH_ERROR) |
2535 | goto cleanup; | |
2536 | if (m == MATCH_NO) | |
2537 | break; | |
2538 | ||
2539 | if (gfc_match_eos () == MATCH_YES) | |
2540 | goto cleanup; | |
2541 | if (gfc_match_char (',') != MATCH_YES) | |
2542 | break; | |
2543 | } | |
2544 | ||
8f81c3c6 PT |
2545 | if (gfc_error_flag_test () == 0) |
2546 | gfc_error ("Syntax error in data declaration at %C"); | |
6de9cd9a DN |
2547 | m = MATCH_ERROR; |
2548 | ||
a9f6f1f2 JD |
2549 | gfc_free_data_all (gfc_current_ns); |
2550 | ||
6de9cd9a DN |
2551 | cleanup: |
2552 | gfc_free_array_spec (current_as); | |
2553 | current_as = NULL; | |
2554 | return m; | |
2555 | } | |
2556 | ||
2557 | ||
2558 | /* Match a prefix associated with a function or subroutine | |
2559 | declaration. If the typespec pointer is nonnull, then a typespec | |
2560 | can be matched. Note that if nothing matches, MATCH_YES is | |
2561 | returned (the null string was matched). */ | |
2562 | ||
2563 | static match | |
636dff67 | 2564 | match_prefix (gfc_typespec *ts) |
6de9cd9a DN |
2565 | { |
2566 | int seen_type; | |
2567 | ||
2568 | gfc_clear_attr (¤t_attr); | |
2569 | seen_type = 0; | |
2570 | ||
2571 | loop: | |
2572 | if (!seen_type && ts != NULL | |
e5ddaa24 | 2573 | && match_type_spec (ts, 0) == MATCH_YES |
6de9cd9a DN |
2574 | && gfc_match_space () == MATCH_YES) |
2575 | { | |
2576 | ||
2577 | seen_type = 1; | |
2578 | goto loop; | |
2579 | } | |
2580 | ||
2581 | if (gfc_match ("elemental% ") == MATCH_YES) | |
2582 | { | |
2583 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
2584 | return MATCH_ERROR; | |
2585 | ||
2586 | goto loop; | |
2587 | } | |
2588 | ||
2589 | if (gfc_match ("pure% ") == MATCH_YES) | |
2590 | { | |
2591 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
2592 | return MATCH_ERROR; | |
2593 | ||
2594 | goto loop; | |
2595 | } | |
2596 | ||
2597 | if (gfc_match ("recursive% ") == MATCH_YES) | |
2598 | { | |
2599 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
2600 | return MATCH_ERROR; | |
2601 | ||
2602 | goto loop; | |
2603 | } | |
2604 | ||
2605 | /* At this point, the next item is not a prefix. */ | |
2606 | return MATCH_YES; | |
2607 | } | |
2608 | ||
2609 | ||
2610 | /* Copy attributes matched by match_prefix() to attributes on a symbol. */ | |
2611 | ||
2612 | static try | |
636dff67 | 2613 | copy_prefix (symbol_attribute *dest, locus *where) |
6de9cd9a | 2614 | { |
6de9cd9a DN |
2615 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
2616 | return FAILURE; | |
2617 | ||
2618 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
2619 | return FAILURE; | |
2620 | ||
2621 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
2622 | return FAILURE; | |
2623 | ||
2624 | return SUCCESS; | |
2625 | } | |
2626 | ||
2627 | ||
2628 | /* Match a formal argument list. */ | |
2629 | ||
2630 | match | |
636dff67 | 2631 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
6de9cd9a DN |
2632 | { |
2633 | gfc_formal_arglist *head, *tail, *p, *q; | |
2634 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2635 | gfc_symbol *sym; | |
2636 | match m; | |
2637 | ||
2638 | head = tail = NULL; | |
2639 | ||
2640 | if (gfc_match_char ('(') != MATCH_YES) | |
2641 | { | |
2642 | if (null_flag) | |
2643 | goto ok; | |
2644 | return MATCH_NO; | |
2645 | } | |
2646 | ||
2647 | if (gfc_match_char (')') == MATCH_YES) | |
2648 | goto ok; | |
2649 | ||
2650 | for (;;) | |
2651 | { | |
2652 | if (gfc_match_char ('*') == MATCH_YES) | |
2653 | sym = NULL; | |
2654 | else | |
2655 | { | |
2656 | m = gfc_match_name (name); | |
2657 | if (m != MATCH_YES) | |
2658 | goto cleanup; | |
2659 | ||
2660 | if (gfc_get_symbol (name, NULL, &sym)) | |
2661 | goto cleanup; | |
2662 | } | |
2663 | ||
2664 | p = gfc_get_formal_arglist (); | |
2665 | ||
2666 | if (head == NULL) | |
2667 | head = tail = p; | |
2668 | else | |
2669 | { | |
2670 | tail->next = p; | |
2671 | tail = p; | |
2672 | } | |
2673 | ||
2674 | tail->sym = sym; | |
2675 | ||
2676 | /* We don't add the VARIABLE flavor because the name could be a | |
636dff67 SK |
2677 | dummy procedure. We don't apply these attributes to formal |
2678 | arguments of statement functions. */ | |
6de9cd9a | 2679 | if (sym != NULL && !st_flag |
231b2fcc | 2680 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
6de9cd9a DN |
2681 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
2682 | { | |
2683 | m = MATCH_ERROR; | |
2684 | goto cleanup; | |
2685 | } | |
2686 | ||
2687 | /* The name of a program unit can be in a different namespace, | |
636dff67 SK |
2688 | so check for it explicitly. After the statement is accepted, |
2689 | the name is checked for especially in gfc_get_symbol(). */ | |
6de9cd9a DN |
2690 | if (gfc_new_block != NULL && sym != NULL |
2691 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
2692 | { | |
2693 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
2694 | sym->name); | |
2695 | m = MATCH_ERROR; | |
2696 | goto cleanup; | |
2697 | } | |
2698 | ||
2699 | if (gfc_match_char (')') == MATCH_YES) | |
2700 | goto ok; | |
2701 | ||
2702 | m = gfc_match_char (','); | |
2703 | if (m != MATCH_YES) | |
2704 | { | |
2705 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
2706 | goto cleanup; | |
2707 | } | |
2708 | } | |
2709 | ||
2710 | ok: | |
2711 | /* Check for duplicate symbols in the formal argument list. */ | |
2712 | if (head != NULL) | |
2713 | { | |
2714 | for (p = head; p->next; p = p->next) | |
2715 | { | |
2716 | if (p->sym == NULL) | |
2717 | continue; | |
2718 | ||
2719 | for (q = p->next; q; q = q->next) | |
2720 | if (p->sym == q->sym) | |
2721 | { | |
636dff67 SK |
2722 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
2723 | "at %C", p->sym->name); | |
6de9cd9a DN |
2724 | |
2725 | m = MATCH_ERROR; | |
2726 | goto cleanup; | |
2727 | } | |
2728 | } | |
2729 | } | |
2730 | ||
2731 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) == | |
2732 | FAILURE) | |
2733 | { | |
2734 | m = MATCH_ERROR; | |
2735 | goto cleanup; | |
2736 | } | |
2737 | ||
2738 | return MATCH_YES; | |
2739 | ||
2740 | cleanup: | |
2741 | gfc_free_formal_arglist (head); | |
2742 | return m; | |
2743 | } | |
2744 | ||
2745 | ||
2746 | /* Match a RESULT specification following a function declaration or | |
2747 | ENTRY statement. Also matches the end-of-statement. */ | |
2748 | ||
2749 | static match | |
636dff67 | 2750 | match_result (gfc_symbol * function, gfc_symbol **result) |
6de9cd9a DN |
2751 | { |
2752 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2753 | gfc_symbol *r; | |
2754 | match m; | |
2755 | ||
2756 | if (gfc_match (" result (") != MATCH_YES) | |
2757 | return MATCH_NO; | |
2758 | ||
2759 | m = gfc_match_name (name); | |
2760 | if (m != MATCH_YES) | |
2761 | return m; | |
2762 | ||
2763 | if (gfc_match (" )%t") != MATCH_YES) | |
2764 | { | |
2765 | gfc_error ("Unexpected junk following RESULT variable at %C"); | |
2766 | return MATCH_ERROR; | |
2767 | } | |
2768 | ||
2769 | if (strcmp (function->name, name) == 0) | |
2770 | { | |
636dff67 | 2771 | gfc_error ("RESULT variable at %C must be different than function name"); |
6de9cd9a DN |
2772 | return MATCH_ERROR; |
2773 | } | |
2774 | ||
2775 | if (gfc_get_symbol (name, NULL, &r)) | |
2776 | return MATCH_ERROR; | |
2777 | ||
231b2fcc TS |
2778 | if (gfc_add_flavor (&r->attr, FL_VARIABLE, r->name, NULL) == FAILURE |
2779 | || gfc_add_result (&r->attr, r->name, NULL) == FAILURE) | |
6de9cd9a DN |
2780 | return MATCH_ERROR; |
2781 | ||
2782 | *result = r; | |
2783 | ||
2784 | return MATCH_YES; | |
2785 | } | |
2786 | ||
2787 | ||
2788 | /* Match a function declaration. */ | |
2789 | ||
2790 | match | |
2791 | gfc_match_function_decl (void) | |
2792 | { | |
2793 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2794 | gfc_symbol *sym, *result; | |
2795 | locus old_loc; | |
2796 | match m; | |
2797 | ||
2798 | if (gfc_current_state () != COMP_NONE | |
2799 | && gfc_current_state () != COMP_INTERFACE | |
2800 | && gfc_current_state () != COMP_CONTAINS) | |
2801 | return MATCH_NO; | |
2802 | ||
2803 | gfc_clear_ts (¤t_ts); | |
2804 | ||
63645982 | 2805 | old_loc = gfc_current_locus; |
6de9cd9a DN |
2806 | |
2807 | m = match_prefix (¤t_ts); | |
2808 | if (m != MATCH_YES) | |
2809 | { | |
63645982 | 2810 | gfc_current_locus = old_loc; |
6de9cd9a DN |
2811 | return m; |
2812 | } | |
2813 | ||
2814 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
2815 | { | |
63645982 | 2816 | gfc_current_locus = old_loc; |
6de9cd9a DN |
2817 | return MATCH_NO; |
2818 | } | |
2819 | ||
1a492601 | 2820 | if (get_proc_name (name, &sym, false)) |
6de9cd9a DN |
2821 | return MATCH_ERROR; |
2822 | gfc_new_block = sym; | |
2823 | ||
2824 | m = gfc_match_formal_arglist (sym, 0, 0); | |
2825 | if (m == MATCH_NO) | |
2b9a33ae TS |
2826 | { |
2827 | gfc_error ("Expected formal argument list in function " | |
636dff67 | 2828 | "definition at %C"); |
2b9a33ae TS |
2829 | m = MATCH_ERROR; |
2830 | goto cleanup; | |
2831 | } | |
6de9cd9a DN |
2832 | else if (m == MATCH_ERROR) |
2833 | goto cleanup; | |
2834 | ||
2835 | result = NULL; | |
2836 | ||
2837 | if (gfc_match_eos () != MATCH_YES) | |
2838 | { | |
2839 | /* See if a result variable is present. */ | |
2840 | m = match_result (sym, &result); | |
2841 | if (m == MATCH_NO) | |
2842 | gfc_error ("Unexpected junk after function declaration at %C"); | |
2843 | ||
2844 | if (m != MATCH_YES) | |
2845 | { | |
2846 | m = MATCH_ERROR; | |
2847 | goto cleanup; | |
2848 | } | |
2849 | } | |
2850 | ||
2851 | /* Make changes to the symbol. */ | |
2852 | m = MATCH_ERROR; | |
2853 | ||
231b2fcc | 2854 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
2855 | goto cleanup; |
2856 | ||
2857 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
2858 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
2859 | goto cleanup; | |
2860 | ||
636dff67 SK |
2861 | if (current_ts.type != BT_UNKNOWN && sym->ts.type != BT_UNKNOWN |
2862 | && !sym->attr.implicit_type) | |
6de9cd9a DN |
2863 | { |
2864 | gfc_error ("Function '%s' at %C already has a type of %s", name, | |
2865 | gfc_basic_typename (sym->ts.type)); | |
2866 | goto cleanup; | |
2867 | } | |
2868 | ||
2869 | if (result == NULL) | |
2870 | { | |
2871 | sym->ts = current_ts; | |
2872 | sym->result = sym; | |
2873 | } | |
2874 | else | |
2875 | { | |
2876 | result->ts = current_ts; | |
2877 | sym->result = result; | |
2878 | } | |
2879 | ||
2880 | return MATCH_YES; | |
2881 | ||
2882 | cleanup: | |
63645982 | 2883 | gfc_current_locus = old_loc; |
6de9cd9a DN |
2884 | return m; |
2885 | } | |
2886 | ||
636dff67 SK |
2887 | |
2888 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
2889 | pass the name of the entry, rather than the gfc_current_block name, and | |
2890 | to return false upon finding an existing global entry. */ | |
68ea355b PT |
2891 | |
2892 | static bool | |
636dff67 | 2893 | add_global_entry (const char *name, int sub) |
68ea355b PT |
2894 | { |
2895 | gfc_gsymbol *s; | |
2896 | ||
2897 | s = gfc_get_gsymbol(name); | |
2898 | ||
2899 | if (s->defined | |
636dff67 SK |
2900 | || (s->type != GSYM_UNKNOWN |
2901 | && s->type != (sub ? GSYM_SUBROUTINE : GSYM_FUNCTION))) | |
68ea355b PT |
2902 | global_used(s, NULL); |
2903 | else | |
2904 | { | |
2905 | s->type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; | |
2906 | s->where = gfc_current_locus; | |
2907 | s->defined = 1; | |
2908 | return true; | |
2909 | } | |
2910 | return false; | |
2911 | } | |
6de9cd9a | 2912 | |
636dff67 | 2913 | |
6de9cd9a DN |
2914 | /* Match an ENTRY statement. */ |
2915 | ||
2916 | match | |
2917 | gfc_match_entry (void) | |
2918 | { | |
3d79abbd PB |
2919 | gfc_symbol *proc; |
2920 | gfc_symbol *result; | |
2921 | gfc_symbol *entry; | |
6de9cd9a DN |
2922 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
2923 | gfc_compile_state state; | |
2924 | match m; | |
3d79abbd | 2925 | gfc_entry_list *el; |
c96cfa49 | 2926 | locus old_loc; |
1a492601 | 2927 | bool module_procedure; |
6de9cd9a DN |
2928 | |
2929 | m = gfc_match_name (name); | |
2930 | if (m != MATCH_YES) | |
2931 | return m; | |
2932 | ||
3d79abbd | 2933 | state = gfc_current_state (); |
4c93c95a | 2934 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
3d79abbd | 2935 | { |
4c93c95a FXC |
2936 | switch (state) |
2937 | { | |
2938 | case COMP_PROGRAM: | |
2939 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
2940 | break; | |
2941 | case COMP_MODULE: | |
2942 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
2943 | break; | |
2944 | case COMP_BLOCK_DATA: | |
636dff67 SK |
2945 | gfc_error ("ENTRY statement at %C cannot appear within " |
2946 | "a BLOCK DATA"); | |
4c93c95a FXC |
2947 | break; |
2948 | case COMP_INTERFACE: | |
636dff67 SK |
2949 | gfc_error ("ENTRY statement at %C cannot appear within " |
2950 | "an INTERFACE"); | |
4c93c95a FXC |
2951 | break; |
2952 | case COMP_DERIVED: | |
636dff67 SK |
2953 | gfc_error ("ENTRY statement at %C cannot appear within " |
2954 | "a DERIVED TYPE block"); | |
4c93c95a FXC |
2955 | break; |
2956 | case COMP_IF: | |
636dff67 SK |
2957 | gfc_error ("ENTRY statement at %C cannot appear within " |
2958 | "an IF-THEN block"); | |
4c93c95a FXC |
2959 | break; |
2960 | case COMP_DO: | |
636dff67 SK |
2961 | gfc_error ("ENTRY statement at %C cannot appear within " |
2962 | "a DO block"); | |
4c93c95a FXC |
2963 | break; |
2964 | case COMP_SELECT: | |
636dff67 SK |
2965 | gfc_error ("ENTRY statement at %C cannot appear within " |
2966 | "a SELECT block"); | |
4c93c95a FXC |
2967 | break; |
2968 | case COMP_FORALL: | |
636dff67 SK |
2969 | gfc_error ("ENTRY statement at %C cannot appear within " |
2970 | "a FORALL block"); | |
4c93c95a FXC |
2971 | break; |
2972 | case COMP_WHERE: | |
636dff67 SK |
2973 | gfc_error ("ENTRY statement at %C cannot appear within " |
2974 | "a WHERE block"); | |
4c93c95a FXC |
2975 | break; |
2976 | case COMP_CONTAINS: | |
636dff67 SK |
2977 | gfc_error ("ENTRY statement at %C cannot appear within " |
2978 | "a contained subprogram"); | |
4c93c95a FXC |
2979 | break; |
2980 | default: | |
2981 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
2982 | } | |
3d79abbd PB |
2983 | return MATCH_ERROR; |
2984 | } | |
2985 | ||
1a492601 | 2986 | module_procedure = gfc_current_ns->parent != NULL |
636dff67 SK |
2987 | && gfc_current_ns->parent->proc_name |
2988 | && gfc_current_ns->parent->proc_name->attr.flavor | |
2989 | == FL_MODULE; | |
1a492601 | 2990 | |
3d79abbd PB |
2991 | if (gfc_current_ns->parent != NULL |
2992 | && gfc_current_ns->parent->proc_name | |
1a492601 | 2993 | && !module_procedure) |
3d79abbd PB |
2994 | { |
2995 | gfc_error("ENTRY statement at %C cannot appear in a " | |
2996 | "contained procedure"); | |
2997 | return MATCH_ERROR; | |
2998 | } | |
2999 | ||
1a492601 PT |
3000 | /* Module function entries need special care in get_proc_name |
3001 | because previous references within the function will have | |
3002 | created symbols attached to the current namespace. */ | |
3003 | if (get_proc_name (name, &entry, | |
3004 | gfc_current_ns->parent != NULL | |
3005 | && module_procedure | |
3006 | && gfc_current_ns->proc_name->attr.function)) | |
6de9cd9a DN |
3007 | return MATCH_ERROR; |
3008 | ||
3d79abbd PB |
3009 | proc = gfc_current_block (); |
3010 | ||
3011 | if (state == COMP_SUBROUTINE) | |
6de9cd9a | 3012 | { |
231b2fcc | 3013 | /* An entry in a subroutine. */ |
68ea355b PT |
3014 | if (!add_global_entry (name, 1)) |
3015 | return MATCH_ERROR; | |
3016 | ||
6de9cd9a DN |
3017 | m = gfc_match_formal_arglist (entry, 0, 1); |
3018 | if (m != MATCH_YES) | |
3019 | return MATCH_ERROR; | |
3020 | ||
231b2fcc TS |
3021 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
3022 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a | 3023 | return MATCH_ERROR; |
3d79abbd PB |
3024 | } |
3025 | else | |
3026 | { | |
c96cfa49 | 3027 | /* An entry in a function. |
636dff67 SK |
3028 | We need to take special care because writing |
3029 | ENTRY f() | |
3030 | as | |
3031 | ENTRY f | |
3032 | is allowed, whereas | |
3033 | ENTRY f() RESULT (r) | |
3034 | can't be written as | |
3035 | ENTRY f RESULT (r). */ | |
68ea355b PT |
3036 | if (!add_global_entry (name, 0)) |
3037 | return MATCH_ERROR; | |
3038 | ||
c96cfa49 TS |
3039 | old_loc = gfc_current_locus; |
3040 | if (gfc_match_eos () == MATCH_YES) | |
3041 | { | |
3042 | gfc_current_locus = old_loc; | |
3043 | /* Match the empty argument list, and add the interface to | |
3044 | the symbol. */ | |
3045 | m = gfc_match_formal_arglist (entry, 0, 1); | |
3046 | } | |
3047 | else | |
3048 | m = gfc_match_formal_arglist (entry, 0, 0); | |
3049 | ||
6de9cd9a DN |
3050 | if (m != MATCH_YES) |
3051 | return MATCH_ERROR; | |
3052 | ||
6de9cd9a DN |
3053 | result = NULL; |
3054 | ||
3055 | if (gfc_match_eos () == MATCH_YES) | |
3056 | { | |
231b2fcc TS |
3057 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
3058 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a DN |
3059 | return MATCH_ERROR; |
3060 | ||
d198b59a | 3061 | entry->result = entry; |
6de9cd9a DN |
3062 | } |
3063 | else | |
3064 | { | |
3d79abbd | 3065 | m = match_result (proc, &result); |
6de9cd9a DN |
3066 | if (m == MATCH_NO) |
3067 | gfc_syntax_error (ST_ENTRY); | |
3068 | if (m != MATCH_YES) | |
3069 | return MATCH_ERROR; | |
3070 | ||
231b2fcc TS |
3071 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE |
3072 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
636dff67 SK |
3073 | || gfc_add_function (&entry->attr, result->name, NULL) |
3074 | == FAILURE) | |
6de9cd9a | 3075 | return MATCH_ERROR; |
d198b59a JJ |
3076 | |
3077 | entry->result = result; | |
6de9cd9a DN |
3078 | } |
3079 | ||
3d79abbd | 3080 | if (proc->attr.recursive && result == NULL) |
6de9cd9a DN |
3081 | { |
3082 | gfc_error ("RESULT attribute required in ENTRY statement at %C"); | |
3083 | return MATCH_ERROR; | |
3084 | } | |
6de9cd9a DN |
3085 | } |
3086 | ||
3087 | if (gfc_match_eos () != MATCH_YES) | |
3088 | { | |
3089 | gfc_syntax_error (ST_ENTRY); | |
3090 | return MATCH_ERROR; | |
3091 | } | |
3092 | ||
3d79abbd PB |
3093 | entry->attr.recursive = proc->attr.recursive; |
3094 | entry->attr.elemental = proc->attr.elemental; | |
3095 | entry->attr.pure = proc->attr.pure; | |
6de9cd9a | 3096 | |
3d79abbd PB |
3097 | el = gfc_get_entry_list (); |
3098 | el->sym = entry; | |
3099 | el->next = gfc_current_ns->entries; | |
3100 | gfc_current_ns->entries = el; | |
3101 | if (el->next) | |
3102 | el->id = el->next->id + 1; | |
3103 | else | |
3104 | el->id = 1; | |
6de9cd9a | 3105 | |
3d79abbd PB |
3106 | new_st.op = EXEC_ENTRY; |
3107 | new_st.ext.entry = el; | |
3108 | ||
3109 | return MATCH_YES; | |
6de9cd9a DN |
3110 | } |
3111 | ||
3112 | ||
3113 | /* Match a subroutine statement, including optional prefixes. */ | |
3114 | ||
3115 | match | |
3116 | gfc_match_subroutine (void) | |
3117 | { | |
3118 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3119 | gfc_symbol *sym; | |
3120 | match m; | |
3121 | ||
3122 | if (gfc_current_state () != COMP_NONE | |
3123 | && gfc_current_state () != COMP_INTERFACE | |
3124 | && gfc_current_state () != COMP_CONTAINS) | |
3125 | return MATCH_NO; | |
3126 | ||
3127 | m = match_prefix (NULL); | |
3128 | if (m != MATCH_YES) | |
3129 | return m; | |
3130 | ||
3131 | m = gfc_match ("subroutine% %n", name); | |
3132 | if (m != MATCH_YES) | |
3133 | return m; | |
3134 | ||
1a492601 | 3135 | if (get_proc_name (name, &sym, false)) |
6de9cd9a DN |
3136 | return MATCH_ERROR; |
3137 | gfc_new_block = sym; | |
3138 | ||
231b2fcc | 3139 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
3140 | return MATCH_ERROR; |
3141 | ||
3142 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
3143 | return MATCH_ERROR; | |
3144 | ||
3145 | if (gfc_match_eos () != MATCH_YES) | |
3146 | { | |
3147 | gfc_syntax_error (ST_SUBROUTINE); | |
3148 | return MATCH_ERROR; | |
3149 | } | |
3150 | ||
3151 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
3152 | return MATCH_ERROR; | |
3153 | ||
3154 | return MATCH_YES; | |
3155 | } | |
3156 | ||
3157 | ||
1f2959f0 | 3158 | /* Return nonzero if we're currently compiling a contained procedure. */ |
ddc9ce91 TS |
3159 | |
3160 | static int | |
3161 | contained_procedure (void) | |
3162 | { | |
3163 | gfc_state_data *s; | |
3164 | ||
3165 | for (s=gfc_state_stack; s; s=s->previous) | |
3166 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) | |
636dff67 | 3167 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) |
ddc9ce91 TS |
3168 | return 1; |
3169 | ||
3170 | return 0; | |
3171 | } | |
3172 | ||
25d8f0a2 TS |
3173 | /* Set the kind of each enumerator. The kind is selected such that it is |
3174 | interoperable with the corresponding C enumeration type, making | |
3175 | sure that -fshort-enums is honored. */ | |
3176 | ||
3177 | static void | |
3178 | set_enum_kind(void) | |
3179 | { | |
3180 | enumerator_history *current_history = NULL; | |
3181 | int kind; | |
3182 | int i; | |
3183 | ||
3184 | if (max_enum == NULL || enum_history == NULL) | |
3185 | return; | |
3186 | ||
3187 | if (!gfc_option.fshort_enums) | |
3188 | return; | |
3189 | ||
3190 | i = 0; | |
3191 | do | |
3192 | { | |
3193 | kind = gfc_integer_kinds[i++].kind; | |
3194 | } | |
3195 | while (kind < gfc_c_int_kind | |
3196 | && gfc_check_integer_range (max_enum->initializer->value.integer, | |
3197 | kind) != ARITH_OK); | |
3198 | ||
3199 | current_history = enum_history; | |
3200 | while (current_history != NULL) | |
3201 | { | |
3202 | current_history->sym->ts.kind = kind; | |
3203 | current_history = current_history->next; | |
3204 | } | |
3205 | } | |
3206 | ||
636dff67 | 3207 | |
6de9cd9a DN |
3208 | /* Match any of the various end-block statements. Returns the type of |
3209 | END to the caller. The END INTERFACE, END IF, END DO and END | |
3210 | SELECT statements cannot be replaced by a single END statement. */ | |
3211 | ||
3212 | match | |
636dff67 | 3213 | gfc_match_end (gfc_statement *st) |
6de9cd9a DN |
3214 | { |
3215 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3216 | gfc_compile_state state; | |
3217 | locus old_loc; | |
3218 | const char *block_name; | |
3219 | const char *target; | |
ddc9ce91 | 3220 | int eos_ok; |
6de9cd9a DN |
3221 | match m; |
3222 | ||
63645982 | 3223 | old_loc = gfc_current_locus; |
6de9cd9a DN |
3224 | if (gfc_match ("end") != MATCH_YES) |
3225 | return MATCH_NO; | |
3226 | ||
3227 | state = gfc_current_state (); | |
636dff67 SK |
3228 | block_name = gfc_current_block () == NULL |
3229 | ? NULL : gfc_current_block ()->name; | |
6de9cd9a DN |
3230 | |
3231 | if (state == COMP_CONTAINS) | |
3232 | { | |
3233 | state = gfc_state_stack->previous->state; | |
636dff67 SK |
3234 | block_name = gfc_state_stack->previous->sym == NULL |
3235 | ? NULL : gfc_state_stack->previous->sym->name; | |
6de9cd9a DN |
3236 | } |
3237 | ||
3238 | switch (state) | |
3239 | { | |
3240 | case COMP_NONE: | |
3241 | case COMP_PROGRAM: | |
3242 | *st = ST_END_PROGRAM; | |
3243 | target = " program"; | |
ddc9ce91 | 3244 | eos_ok = 1; |
6de9cd9a DN |
3245 | break; |
3246 | ||
3247 | case COMP_SUBROUTINE: | |
3248 | *st = ST_END_SUBROUTINE; | |
3249 | target = " subroutine"; | |
ddc9ce91 | 3250 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
3251 | break; |
3252 | ||
3253 | case COMP_FUNCTION: | |
3254 | *st = ST_END_FUNCTION; | |
3255 | target = " function"; | |
ddc9ce91 | 3256 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
3257 | break; |
3258 | ||
3259 | case COMP_BLOCK_DATA: | |
3260 | *st = ST_END_BLOCK_DATA; | |
3261 | target = " block data"; | |
ddc9ce91 | 3262 | eos_ok = 1; |
6de9cd9a DN |
3263 | break; |
3264 | ||
3265 | case COMP_MODULE: | |
3266 | *st = ST_END_MODULE; | |
3267 | target = " module"; | |
ddc9ce91 | 3268 | eos_ok = 1; |
6de9cd9a DN |
3269 | break; |
3270 | ||
3271 | case COMP_INTERFACE: | |
3272 | *st = ST_END_INTERFACE; | |
3273 | target = " interface"; | |
ddc9ce91 | 3274 | eos_ok = 0; |
6de9cd9a DN |
3275 | break; |
3276 | ||
3277 | case COMP_DERIVED: | |
3278 | *st = ST_END_TYPE; | |
3279 | target = " type"; | |
ddc9ce91 | 3280 | eos_ok = 0; |
6de9cd9a DN |
3281 | break; |
3282 | ||
3283 | case COMP_IF: | |
3284 | *st = ST_ENDIF; | |
3285 | target = " if"; | |
ddc9ce91 | 3286 | eos_ok = 0; |
6de9cd9a DN |
3287 | break; |
3288 | ||
3289 | case COMP_DO: | |
3290 | *st = ST_ENDDO; | |
3291 | target = " do"; | |
ddc9ce91 | 3292 | eos_ok = 0; |
6de9cd9a DN |
3293 | break; |
3294 | ||
3295 | case COMP_SELECT: | |
3296 | *st = ST_END_SELECT; | |
3297 | target = " select"; | |
ddc9ce91 | 3298 | eos_ok = 0; |
6de9cd9a DN |
3299 | break; |
3300 | ||
3301 | case COMP_FORALL: | |
3302 | *st = ST_END_FORALL; | |
3303 | target = " forall"; | |
ddc9ce91 | 3304 | eos_ok = 0; |
6de9cd9a DN |
3305 | break; |
3306 | ||
3307 | case COMP_WHERE: | |
3308 | *st = ST_END_WHERE; | |
3309 | target = " where"; | |
ddc9ce91 | 3310 | eos_ok = 0; |
6de9cd9a DN |
3311 | break; |
3312 | ||
25d8f0a2 TS |
3313 | case COMP_ENUM: |
3314 | *st = ST_END_ENUM; | |
3315 | target = " enum"; | |
3316 | eos_ok = 0; | |
3317 | last_initializer = NULL; | |
3318 | set_enum_kind (); | |
3319 | gfc_free_enum_history (); | |
3320 | break; | |
3321 | ||
6de9cd9a DN |
3322 | default: |
3323 | gfc_error ("Unexpected END statement at %C"); | |
3324 | goto cleanup; | |
3325 | } | |
3326 | ||
3327 | if (gfc_match_eos () == MATCH_YES) | |
3328 | { | |
ddc9ce91 | 3329 | if (!eos_ok) |
6de9cd9a | 3330 | { |
ddc9ce91 | 3331 | /* We would have required END [something] */ |
59ce85b5 TS |
3332 | gfc_error ("%s statement expected at %L", |
3333 | gfc_ascii_statement (*st), &old_loc); | |
6de9cd9a DN |
3334 | goto cleanup; |
3335 | } | |
3336 | ||
3337 | return MATCH_YES; | |
3338 | } | |
3339 | ||
3340 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
3341 | if (gfc_match (target) != MATCH_YES) | |
3342 | { | |
3343 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
3344 | goto cleanup; | |
3345 | } | |
3346 | ||
3347 | /* If we're at the end, make sure a block name wasn't required. */ | |
3348 | if (gfc_match_eos () == MATCH_YES) | |
3349 | { | |
3350 | ||
3351 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT) | |
3352 | return MATCH_YES; | |
3353 | ||
3354 | if (gfc_current_block () == NULL) | |
3355 | return MATCH_YES; | |
3356 | ||
3357 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
3358 | block_name, gfc_ascii_statement (*st)); | |
3359 | ||
3360 | return MATCH_ERROR; | |
3361 | } | |
3362 | ||
3363 | /* END INTERFACE has a special handler for its several possible endings. */ | |
3364 | if (*st == ST_END_INTERFACE) | |
3365 | return gfc_match_end_interface (); | |
3366 | ||
3367 | /* We haven't hit the end of statement, so what is left must be an end-name. */ | |
3368 | m = gfc_match_space (); | |
3369 | if (m == MATCH_YES) | |
3370 | m = gfc_match_name (name); | |
3371 | ||
3372 | if (m == MATCH_NO) | |
3373 | gfc_error ("Expected terminating name at %C"); | |
3374 | if (m != MATCH_YES) | |
3375 | goto cleanup; | |
3376 | ||
3377 | if (block_name == NULL) | |
3378 | goto syntax; | |
3379 | ||
3380 | if (strcmp (name, block_name) != 0) | |
3381 | { | |
3382 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
3383 | gfc_ascii_statement (*st)); | |
3384 | goto cleanup; | |
3385 | } | |
3386 | ||
3387 | if (gfc_match_eos () == MATCH_YES) | |
3388 | return MATCH_YES; | |
3389 | ||
3390 | syntax: | |
3391 | gfc_syntax_error (*st); | |
3392 | ||
3393 | cleanup: | |
63645982 | 3394 | gfc_current_locus = old_loc; |
6de9cd9a DN |
3395 | return MATCH_ERROR; |
3396 | } | |
3397 | ||
3398 | ||
3399 | ||
3400 | /***************** Attribute declaration statements ****************/ | |
3401 | ||
3402 | /* Set the attribute of a single variable. */ | |
3403 | ||
3404 | static match | |
3405 | attr_decl1 (void) | |
3406 | { | |
3407 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3408 | gfc_array_spec *as; | |
3409 | gfc_symbol *sym; | |
3410 | locus var_locus; | |
3411 | match m; | |
3412 | ||
3413 | as = NULL; | |
3414 | ||
3415 | m = gfc_match_name (name); | |
3416 | if (m != MATCH_YES) | |
3417 | goto cleanup; | |
3418 | ||
3419 | if (find_special (name, &sym)) | |
3420 | return MATCH_ERROR; | |
3421 | ||
63645982 | 3422 | var_locus = gfc_current_locus; |
6de9cd9a DN |
3423 | |
3424 | /* Deal with possible array specification for certain attributes. */ | |
3425 | if (current_attr.dimension | |
3426 | || current_attr.allocatable | |
3427 | || current_attr.pointer | |
3428 | || current_attr.target) | |
3429 | { | |
3430 | m = gfc_match_array_spec (&as); | |
3431 | if (m == MATCH_ERROR) | |
3432 | goto cleanup; | |
3433 | ||
3434 | if (current_attr.dimension && m == MATCH_NO) | |
3435 | { | |
636dff67 SK |
3436 | gfc_error ("Missing array specification at %L in DIMENSION " |
3437 | "statement", &var_locus); | |
6de9cd9a DN |
3438 | m = MATCH_ERROR; |
3439 | goto cleanup; | |
3440 | } | |
3441 | ||
3442 | if ((current_attr.allocatable || current_attr.pointer) | |
3443 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
3444 | { | |
636dff67 | 3445 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
6de9cd9a DN |
3446 | m = MATCH_ERROR; |
3447 | goto cleanup; | |
3448 | } | |
3449 | } | |
3450 | ||
636dff67 SK |
3451 | /* Update symbol table. DIMENSION attribute is set |
3452 | in gfc_set_array_spec(). */ | |
6de9cd9a DN |
3453 | if (current_attr.dimension == 0 |
3454 | && gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
3455 | { | |
3456 | m = MATCH_ERROR; | |
3457 | goto cleanup; | |
3458 | } | |
3459 | ||
3460 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
3461 | { | |
3462 | m = MATCH_ERROR; | |
3463 | goto cleanup; | |
3464 | } | |
83d890b9 AL |
3465 | |
3466 | if (sym->attr.cray_pointee && sym->as != NULL) | |
3467 | { | |
3468 | /* Fix the array spec. */ | |
3469 | m = gfc_mod_pointee_as (sym->as); | |
3470 | if (m == MATCH_ERROR) | |
3471 | goto cleanup; | |
3472 | } | |
6de9cd9a | 3473 | |
7114edca | 3474 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
1902704e PT |
3475 | { |
3476 | m = MATCH_ERROR; | |
3477 | goto cleanup; | |
3478 | } | |
3479 | ||
6de9cd9a DN |
3480 | if ((current_attr.external || current_attr.intrinsic) |
3481 | && sym->attr.flavor != FL_PROCEDURE | |
231b2fcc | 3482 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
3483 | { |
3484 | m = MATCH_ERROR; | |
3485 | goto cleanup; | |
3486 | } | |
3487 | ||
3488 | return MATCH_YES; | |
3489 | ||
3490 | cleanup: | |
3491 | gfc_free_array_spec (as); | |
3492 | return m; | |
3493 | } | |
3494 | ||
3495 | ||
3496 | /* Generic attribute declaration subroutine. Used for attributes that | |
3497 | just have a list of names. */ | |
3498 | ||
3499 | static match | |
3500 | attr_decl (void) | |
3501 | { | |
3502 | match m; | |
3503 | ||
3504 | /* Gobble the optional double colon, by simply ignoring the result | |
3505 | of gfc_match(). */ | |
3506 | gfc_match (" ::"); | |
3507 | ||
3508 | for (;;) | |
3509 | { | |
3510 | m = attr_decl1 (); | |
3511 | if (m != MATCH_YES) | |
3512 | break; | |
3513 | ||
3514 | if (gfc_match_eos () == MATCH_YES) | |
3515 | { | |
3516 | m = MATCH_YES; | |
3517 | break; | |
3518 | } | |
3519 | ||
3520 | if (gfc_match_char (',') != MATCH_YES) | |
3521 | { | |
3522 | gfc_error ("Unexpected character in variable list at %C"); | |
3523 | m = MATCH_ERROR; | |
3524 | break; | |
3525 | } | |
3526 | } | |
3527 | ||
3528 | return m; | |
3529 | } | |
3530 | ||
3531 | ||
83d890b9 AL |
3532 | /* This routine matches Cray Pointer declarations of the form: |
3533 | pointer ( <pointer>, <pointee> ) | |
3534 | or | |
3535 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... | |
3536 | The pointer, if already declared, should be an integer. Otherwise, we | |
3537 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may | |
3538 | be either a scalar, or an array declaration. No space is allocated for | |
3539 | the pointee. For the statement | |
3540 | pointer (ipt, ar(10)) | |
3541 | any subsequent uses of ar will be translated (in C-notation) as | |
3542 | ar(i) => ((<type> *) ipt)(i) | |
b122dc6a | 3543 | After gimplification, pointee variable will disappear in the code. */ |
83d890b9 AL |
3544 | |
3545 | static match | |
3546 | cray_pointer_decl (void) | |
3547 | { | |
3548 | match m; | |
3549 | gfc_array_spec *as; | |
3550 | gfc_symbol *cptr; /* Pointer symbol. */ | |
3551 | gfc_symbol *cpte; /* Pointee symbol. */ | |
3552 | locus var_locus; | |
3553 | bool done = false; | |
3554 | ||
3555 | while (!done) | |
3556 | { | |
3557 | if (gfc_match_char ('(') != MATCH_YES) | |
3558 | { | |
3559 | gfc_error ("Expected '(' at %C"); | |
3560 | return MATCH_ERROR; | |
3561 | } | |
3562 | ||
3563 | /* Match pointer. */ | |
3564 | var_locus = gfc_current_locus; | |
3565 | gfc_clear_attr (¤t_attr); | |
3566 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
3567 | current_ts.type = BT_INTEGER; | |
3568 | current_ts.kind = gfc_index_integer_kind; | |
3569 | ||
3570 | m = gfc_match_symbol (&cptr, 0); | |
3571 | if (m != MATCH_YES) | |
3572 | { | |
3573 | gfc_error ("Expected variable name at %C"); | |
3574 | return m; | |
3575 | } | |
3576 | ||
3577 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) | |
3578 | return MATCH_ERROR; | |
3579 | ||
3580 | gfc_set_sym_referenced (cptr); | |
3581 | ||
3582 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
3583 | { | |
3584 | cptr->ts.type = BT_INTEGER; | |
3585 | cptr->ts.kind = gfc_index_integer_kind; | |
3586 | } | |
3587 | else if (cptr->ts.type != BT_INTEGER) | |
3588 | { | |
e25a0da3 | 3589 | gfc_error ("Cray pointer at %C must be an integer"); |
83d890b9 AL |
3590 | return MATCH_ERROR; |
3591 | } | |
3592 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
3593 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
e25a0da3 | 3594 | " memory addresses require %d bytes", |
636dff67 | 3595 | cptr->ts.kind, gfc_index_integer_kind); |
83d890b9 AL |
3596 | |
3597 | if (gfc_match_char (',') != MATCH_YES) | |
3598 | { | |
3599 | gfc_error ("Expected \",\" at %C"); | |
3600 | return MATCH_ERROR; | |
3601 | } | |
3602 | ||
3603 | /* Match Pointee. */ | |
3604 | var_locus = gfc_current_locus; | |
3605 | gfc_clear_attr (¤t_attr); | |
3606 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
3607 | current_ts.type = BT_UNKNOWN; | |
3608 | current_ts.kind = 0; | |
3609 | ||
3610 | m = gfc_match_symbol (&cpte, 0); | |
3611 | if (m != MATCH_YES) | |
3612 | { | |
3613 | gfc_error ("Expected variable name at %C"); | |
3614 | return m; | |
3615 | } | |
3616 | ||
3617 | /* Check for an optional array spec. */ | |
3618 | m = gfc_match_array_spec (&as); | |
3619 | if (m == MATCH_ERROR) | |
3620 | { | |
3621 | gfc_free_array_spec (as); | |
3622 | return m; | |
3623 | } | |
3624 | else if (m == MATCH_NO) | |
3625 | { | |
3626 | gfc_free_array_spec (as); | |
3627 | as = NULL; | |
3628 | } | |
3629 | ||
3630 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
3631 | return MATCH_ERROR; | |
3632 | ||
3633 | gfc_set_sym_referenced (cpte); | |
3634 | ||
3635 | if (cpte->as == NULL) | |
3636 | { | |
3637 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
3638 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
3639 | } | |
3640 | else if (as != NULL) | |
3641 | { | |
e25a0da3 | 3642 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
83d890b9 AL |
3643 | gfc_free_array_spec (as); |
3644 | return MATCH_ERROR; | |
3645 | } | |
3646 | ||
3647 | as = NULL; | |
3648 | ||
3649 | if (cpte->as != NULL) | |
3650 | { | |
3651 | /* Fix array spec. */ | |
3652 | m = gfc_mod_pointee_as (cpte->as); | |
3653 | if (m == MATCH_ERROR) | |
3654 | return m; | |
3655 | } | |
3656 | ||
3657 | /* Point the Pointee at the Pointer. */ | |
b122dc6a | 3658 | cpte->cp_pointer = cptr; |
83d890b9 AL |
3659 | |
3660 | if (gfc_match_char (')') != MATCH_YES) | |
3661 | { | |
3662 | gfc_error ("Expected \")\" at %C"); | |
3663 | return MATCH_ERROR; | |
3664 | } | |
3665 | m = gfc_match_char (','); | |
3666 | if (m != MATCH_YES) | |
3667 | done = true; /* Stop searching for more declarations. */ | |
3668 | ||
3669 | } | |
3670 | ||
3671 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
3672 | || gfc_match_eos () != MATCH_YES) | |
3673 | { | |
3674 | gfc_error ("Expected \",\" or end of statement at %C"); | |
3675 | return MATCH_ERROR; | |
3676 | } | |
3677 | return MATCH_YES; | |
3678 | } | |
3679 | ||
3680 | ||
6de9cd9a DN |
3681 | match |
3682 | gfc_match_external (void) | |
3683 | { | |
3684 | ||
3685 | gfc_clear_attr (¤t_attr); | |
1902704e | 3686 | current_attr.external = 1; |
6de9cd9a DN |
3687 | |
3688 | return attr_decl (); | |
3689 | } | |
3690 | ||
3691 | ||
6de9cd9a DN |
3692 | match |
3693 | gfc_match_intent (void) | |
3694 | { | |
3695 | sym_intent intent; | |
3696 | ||
3697 | intent = match_intent_spec (); | |
3698 | if (intent == INTENT_UNKNOWN) | |
3699 | return MATCH_ERROR; | |
3700 | ||
3701 | gfc_clear_attr (¤t_attr); | |
1902704e | 3702 | current_attr.intent = intent; |
6de9cd9a DN |
3703 | |
3704 | return attr_decl (); | |
3705 | } | |
3706 | ||
3707 | ||
3708 | match | |
3709 | gfc_match_intrinsic (void) | |
3710 | { | |
3711 | ||
3712 | gfc_clear_attr (¤t_attr); | |
1902704e | 3713 | current_attr.intrinsic = 1; |
6de9cd9a DN |
3714 | |
3715 | return attr_decl (); | |
3716 | } | |
3717 | ||
3718 | ||
3719 | match | |
3720 | gfc_match_optional (void) | |
3721 | { | |
3722 | ||
3723 | gfc_clear_attr (¤t_attr); | |
1902704e | 3724 | current_attr.optional = 1; |
6de9cd9a DN |
3725 | |
3726 | return attr_decl (); | |
3727 | } | |
3728 | ||
3729 | ||
3730 | match | |
3731 | gfc_match_pointer (void) | |
3732 | { | |
83d890b9 AL |
3733 | gfc_gobble_whitespace (); |
3734 | if (gfc_peek_char () == '(') | |
3735 | { | |
3736 | if (!gfc_option.flag_cray_pointer) | |
3737 | { | |
636dff67 SK |
3738 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
3739 | "flag"); | |
83d890b9 AL |
3740 | return MATCH_ERROR; |
3741 | } | |
3742 | return cray_pointer_decl (); | |
3743 | } | |
3744 | else | |
3745 | { | |
3746 | gfc_clear_attr (¤t_attr); | |
1902704e | 3747 | current_attr.pointer = 1; |
83d890b9 AL |
3748 | |
3749 | return attr_decl (); | |
3750 | } | |
6de9cd9a DN |
3751 | } |
3752 | ||
3753 | ||
3754 | match | |
3755 | gfc_match_allocatable (void) | |
3756 | { | |
6de9cd9a | 3757 | gfc_clear_attr (¤t_attr); |
1902704e | 3758 | current_attr.allocatable = 1; |
6de9cd9a DN |
3759 | |
3760 | return attr_decl (); | |
3761 | } | |
3762 | ||
3763 | ||
3764 | match | |
3765 | gfc_match_dimension (void) | |
3766 | { | |
6de9cd9a | 3767 | gfc_clear_attr (¤t_attr); |
1902704e | 3768 | current_attr.dimension = 1; |
6de9cd9a DN |
3769 | |
3770 | return attr_decl (); | |
3771 | } | |
3772 | ||
3773 | ||
3774 | match | |
3775 | gfc_match_target (void) | |
3776 | { | |
6de9cd9a | 3777 | gfc_clear_attr (¤t_attr); |
1902704e | 3778 | current_attr.target = 1; |
6de9cd9a DN |
3779 | |
3780 | return attr_decl (); | |
3781 | } | |
3782 | ||
3783 | ||
3784 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
3785 | statement. */ | |
3786 | ||
3787 | static match | |
3788 | access_attr_decl (gfc_statement st) | |
3789 | { | |
3790 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3791 | interface_type type; | |
3792 | gfc_user_op *uop; | |
3793 | gfc_symbol *sym; | |
3794 | gfc_intrinsic_op operator; | |
3795 | match m; | |
3796 | ||
3797 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
3798 | goto done; | |
3799 | ||
3800 | for (;;) | |
3801 | { | |
3802 | m = gfc_match_generic_spec (&type, name, &operator); | |
3803 | if (m == MATCH_NO) | |
3804 | goto syntax; | |
3805 | if (m == MATCH_ERROR) | |
3806 | return MATCH_ERROR; | |
3807 | ||
3808 | switch (type) | |
3809 | { | |
3810 | case INTERFACE_NAMELESS: | |
3811 | goto syntax; | |
3812 | ||
3813 | case INTERFACE_GENERIC: | |
3814 | if (gfc_get_symbol (name, NULL, &sym)) | |
3815 | goto done; | |
3816 | ||
636dff67 SK |
3817 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
3818 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
231b2fcc | 3819 | sym->name, NULL) == FAILURE) |
6de9cd9a DN |
3820 | return MATCH_ERROR; |
3821 | ||
3822 | break; | |
3823 | ||
3824 | case INTERFACE_INTRINSIC_OP: | |
3825 | if (gfc_current_ns->operator_access[operator] == ACCESS_UNKNOWN) | |
3826 | { | |
3827 | gfc_current_ns->operator_access[operator] = | |
3828 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
3829 | } | |
3830 | else | |
3831 | { | |
3832 | gfc_error ("Access specification of the %s operator at %C has " | |
3833 | "already been specified", gfc_op2string (operator)); | |
3834 | goto done; | |
3835 | } | |
3836 | ||
3837 | break; | |
3838 | ||
3839 | case INTERFACE_USER_OP: | |
3840 | uop = gfc_get_uop (name); | |
3841 | ||
3842 | if (uop->access == ACCESS_UNKNOWN) | |
3843 | { | |
636dff67 SK |
3844 | uop->access = (st == ST_PUBLIC) |
3845 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
6de9cd9a DN |
3846 | } |
3847 | else | |
3848 | { | |
636dff67 SK |
3849 | gfc_error ("Access specification of the .%s. operator at %C " |
3850 | "has already been specified", sym->name); | |
6de9cd9a DN |
3851 | goto done; |
3852 | } | |
3853 | ||
3854 | break; | |
3855 | } | |
3856 | ||
3857 | if (gfc_match_char (',') == MATCH_NO) | |
3858 | break; | |
3859 | } | |
3860 | ||
3861 | if (gfc_match_eos () != MATCH_YES) | |
3862 | goto syntax; | |
3863 | return MATCH_YES; | |
3864 | ||
3865 | syntax: | |
3866 | gfc_syntax_error (st); | |
3867 | ||
3868 | done: | |
3869 | return MATCH_ERROR; | |
3870 | } | |
3871 | ||
3872 | ||
ee7e677f TB |
3873 | match |
3874 | gfc_match_protected (void) | |
3875 | { | |
3876 | gfc_symbol *sym; | |
3877 | match m; | |
3878 | ||
3879 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
3880 | { | |
3881 | gfc_error ("PROTECTED at %C only allowed in specification " | |
3882 | "part of a module"); | |
3883 | return MATCH_ERROR; | |
3884 | ||
3885 | } | |
3886 | ||
636dff67 | 3887 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
ee7e677f TB |
3888 | == FAILURE) |
3889 | return MATCH_ERROR; | |
3890 | ||
3891 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
3892 | { | |
3893 | return MATCH_ERROR; | |
3894 | } | |
3895 | ||
3896 | if (gfc_match_eos () == MATCH_YES) | |
3897 | goto syntax; | |
3898 | ||
3899 | for(;;) | |
3900 | { | |
3901 | m = gfc_match_symbol (&sym, 0); | |
3902 | switch (m) | |
3903 | { | |
3904 | case MATCH_YES: | |
636dff67 SK |
3905 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
3906 | == FAILURE) | |
ee7e677f TB |
3907 | return MATCH_ERROR; |
3908 | goto next_item; | |
3909 | ||
3910 | case MATCH_NO: | |
3911 | break; | |
3912 | ||
3913 | case MATCH_ERROR: | |
3914 | return MATCH_ERROR; | |
3915 | } | |
3916 | ||
3917 | next_item: | |
3918 | if (gfc_match_eos () == MATCH_YES) | |
3919 | break; | |
3920 | if (gfc_match_char (',') != MATCH_YES) | |
3921 | goto syntax; | |
3922 | } | |
3923 | ||
3924 | return MATCH_YES; | |
3925 | ||
3926 | syntax: | |
3927 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
3928 | return MATCH_ERROR; | |
3929 | } | |
3930 | ||
3931 | ||
6de9cd9a DN |
3932 | /* The PRIVATE statement is a bit weird in that it can be a attribute |
3933 | declaration, but also works as a standlone statement inside of a | |
3934 | type declaration or a module. */ | |
3935 | ||
3936 | match | |
636dff67 | 3937 | gfc_match_private (gfc_statement *st) |
6de9cd9a DN |
3938 | { |
3939 | ||
3940 | if (gfc_match ("private") != MATCH_YES) | |
3941 | return MATCH_NO; | |
3942 | ||
3943 | if (gfc_current_state () == COMP_DERIVED) | |
3944 | { | |
3945 | if (gfc_match_eos () == MATCH_YES) | |
3946 | { | |
3947 | *st = ST_PRIVATE; | |
3948 | return MATCH_YES; | |
3949 | } | |
3950 | ||
3951 | gfc_syntax_error (ST_PRIVATE); | |
3952 | return MATCH_ERROR; | |
3953 | } | |
3954 | ||
3955 | if (gfc_match_eos () == MATCH_YES) | |
3956 | { | |
3957 | *st = ST_PRIVATE; | |
3958 | return MATCH_YES; | |
3959 | } | |
3960 | ||
3961 | *st = ST_ATTR_DECL; | |
3962 | return access_attr_decl (ST_PRIVATE); | |
3963 | } | |
3964 | ||
3965 | ||
3966 | match | |
636dff67 | 3967 | gfc_match_public (gfc_statement *st) |
6de9cd9a DN |
3968 | { |
3969 | ||
3970 | if (gfc_match ("public") != MATCH_YES) | |
3971 | return MATCH_NO; | |
3972 | ||
3973 | if (gfc_match_eos () == MATCH_YES) | |
3974 | { | |
3975 | *st = ST_PUBLIC; | |
3976 | return MATCH_YES; | |
3977 | } | |
3978 | ||
3979 | *st = ST_ATTR_DECL; | |
3980 | return access_attr_decl (ST_PUBLIC); | |
3981 | } | |
3982 | ||
3983 | ||
3984 | /* Workhorse for gfc_match_parameter. */ | |
3985 | ||
3986 | static match | |
3987 | do_parm (void) | |
3988 | { | |
3989 | gfc_symbol *sym; | |
3990 | gfc_expr *init; | |
3991 | match m; | |
3992 | ||
3993 | m = gfc_match_symbol (&sym, 0); | |
3994 | if (m == MATCH_NO) | |
3995 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
3996 | ||
3997 | if (m != MATCH_YES) | |
3998 | return m; | |
3999 | ||
4000 | if (gfc_match_char ('=') == MATCH_NO) | |
4001 | { | |
4002 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
4003 | return MATCH_ERROR; | |
4004 | } | |
4005 | ||
4006 | m = gfc_match_init_expr (&init); | |
4007 | if (m == MATCH_NO) | |
4008 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
4009 | if (m != MATCH_YES) | |
4010 | return m; | |
4011 | ||
4012 | if (sym->ts.type == BT_UNKNOWN | |
4013 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
4014 | { | |
4015 | m = MATCH_ERROR; | |
4016 | goto cleanup; | |
4017 | } | |
4018 | ||
4019 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
231b2fcc | 4020 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
4021 | { |
4022 | m = MATCH_ERROR; | |
4023 | goto cleanup; | |
4024 | } | |
4025 | ||
7e2eba4b DE |
4026 | if (sym->ts.type == BT_CHARACTER |
4027 | && sym->ts.cl != NULL | |
4028 | && sym->ts.cl->length != NULL | |
4029 | && sym->ts.cl->length->expr_type == EXPR_CONSTANT | |
4030 | && init->expr_type == EXPR_CONSTANT | |
4031 | && init->ts.type == BT_CHARACTER | |
4032 | && init->ts.kind == 1) | |
4033 | gfc_set_constant_character_len ( | |
2220652d | 4034 | mpz_get_si (sym->ts.cl->length->value.integer), init, false); |
7e2eba4b | 4035 | |
6de9cd9a DN |
4036 | sym->value = init; |
4037 | return MATCH_YES; | |
4038 | ||
4039 | cleanup: | |
4040 | gfc_free_expr (init); | |
4041 | return m; | |
4042 | } | |
4043 | ||
4044 | ||
4045 | /* Match a parameter statement, with the weird syntax that these have. */ | |
4046 | ||
4047 | match | |
4048 | gfc_match_parameter (void) | |
4049 | { | |
4050 | match m; | |
4051 | ||
4052 | if (gfc_match_char ('(') == MATCH_NO) | |
4053 | return MATCH_NO; | |
4054 | ||
4055 | for (;;) | |
4056 | { | |
4057 | m = do_parm (); | |
4058 | if (m != MATCH_YES) | |
4059 | break; | |
4060 | ||
4061 | if (gfc_match (" )%t") == MATCH_YES) | |
4062 | break; | |
4063 | ||
4064 | if (gfc_match_char (',') != MATCH_YES) | |
4065 | { | |
4066 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
4067 | m = MATCH_ERROR; | |
4068 | break; | |
4069 | } | |
4070 | } | |
4071 | ||
4072 | return m; | |
4073 | } | |
4074 | ||
4075 | ||
4076 | /* Save statements have a special syntax. */ | |
4077 | ||
4078 | match | |
4079 | gfc_match_save (void) | |
4080 | { | |
9056bd70 TS |
4081 | char n[GFC_MAX_SYMBOL_LEN+1]; |
4082 | gfc_common_head *c; | |
6de9cd9a DN |
4083 | gfc_symbol *sym; |
4084 | match m; | |
4085 | ||
4086 | if (gfc_match_eos () == MATCH_YES) | |
4087 | { | |
4088 | if (gfc_current_ns->seen_save) | |
4089 | { | |
636dff67 SK |
4090 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
4091 | "follows previous SAVE statement") | |
09e87839 AL |
4092 | == FAILURE) |
4093 | return MATCH_ERROR; | |
6de9cd9a DN |
4094 | } |
4095 | ||
4096 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
4097 | return MATCH_YES; | |
4098 | } | |
4099 | ||
4100 | if (gfc_current_ns->save_all) | |
4101 | { | |
636dff67 SK |
4102 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
4103 | "blanket SAVE statement") | |
09e87839 AL |
4104 | == FAILURE) |
4105 | return MATCH_ERROR; | |
6de9cd9a DN |
4106 | } |
4107 | ||
4108 | gfc_match (" ::"); | |
4109 | ||
4110 | for (;;) | |
4111 | { | |
4112 | m = gfc_match_symbol (&sym, 0); | |
4113 | switch (m) | |
4114 | { | |
4115 | case MATCH_YES: | |
636dff67 SK |
4116 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
4117 | == FAILURE) | |
6de9cd9a DN |
4118 | return MATCH_ERROR; |
4119 | goto next_item; | |
4120 | ||
4121 | case MATCH_NO: | |
4122 | break; | |
4123 | ||
4124 | case MATCH_ERROR: | |
4125 | return MATCH_ERROR; | |
4126 | } | |
4127 | ||
9056bd70 | 4128 | m = gfc_match (" / %n /", &n); |
6de9cd9a DN |
4129 | if (m == MATCH_ERROR) |
4130 | return MATCH_ERROR; | |
4131 | if (m == MATCH_NO) | |
4132 | goto syntax; | |
4133 | ||
53814b8f | 4134 | c = gfc_get_common (n, 0); |
9056bd70 TS |
4135 | c->saved = 1; |
4136 | ||
6de9cd9a DN |
4137 | gfc_current_ns->seen_save = 1; |
4138 | ||
4139 | next_item: | |
4140 | if (gfc_match_eos () == MATCH_YES) | |
4141 | break; | |
4142 | if (gfc_match_char (',') != MATCH_YES) | |
4143 | goto syntax; | |
4144 | } | |
4145 | ||
4146 | return MATCH_YES; | |
4147 | ||
4148 | syntax: | |
4149 | gfc_error ("Syntax error in SAVE statement at %C"); | |
4150 | return MATCH_ERROR; | |
4151 | } | |
4152 | ||
4153 | ||
06469efd PT |
4154 | match |
4155 | gfc_match_value (void) | |
4156 | { | |
4157 | gfc_symbol *sym; | |
4158 | match m; | |
4159 | ||
636dff67 | 4160 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
06469efd PT |
4161 | == FAILURE) |
4162 | return MATCH_ERROR; | |
4163 | ||
4164 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
4165 | { | |
4166 | return MATCH_ERROR; | |
4167 | } | |
4168 | ||
4169 | if (gfc_match_eos () == MATCH_YES) | |
4170 | goto syntax; | |
4171 | ||
4172 | for(;;) | |
4173 | { | |
4174 | m = gfc_match_symbol (&sym, 0); | |
4175 | switch (m) | |
4176 | { | |
4177 | case MATCH_YES: | |
636dff67 SK |
4178 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
4179 | == FAILURE) | |
06469efd PT |
4180 | return MATCH_ERROR; |
4181 | goto next_item; | |
4182 | ||
4183 | case MATCH_NO: | |
4184 | break; | |
4185 | ||
4186 | case MATCH_ERROR: | |
4187 | return MATCH_ERROR; | |
4188 | } | |
4189 | ||
4190 | next_item: | |
4191 | if (gfc_match_eos () == MATCH_YES) | |
4192 | break; | |
4193 | if (gfc_match_char (',') != MATCH_YES) | |
4194 | goto syntax; | |
4195 | } | |
4196 | ||
4197 | return MATCH_YES; | |
4198 | ||
4199 | syntax: | |
4200 | gfc_error ("Syntax error in VALUE statement at %C"); | |
4201 | return MATCH_ERROR; | |
4202 | } | |
4203 | ||
775e6c3a TB |
4204 | match |
4205 | gfc_match_volatile (void) | |
4206 | { | |
4207 | gfc_symbol *sym; | |
4208 | match m; | |
4209 | ||
636dff67 | 4210 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
775e6c3a TB |
4211 | == FAILURE) |
4212 | return MATCH_ERROR; | |
4213 | ||
4214 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
4215 | { | |
4216 | return MATCH_ERROR; | |
4217 | } | |
4218 | ||
4219 | if (gfc_match_eos () == MATCH_YES) | |
4220 | goto syntax; | |
4221 | ||
4222 | for(;;) | |
4223 | { | |
9bce3c1c TB |
4224 | /* VOLATILE is special because it can be added to host-associated |
4225 | symbols locally. */ | |
4226 | m = gfc_match_symbol (&sym, 1); | |
775e6c3a TB |
4227 | switch (m) |
4228 | { | |
4229 | case MATCH_YES: | |
636dff67 SK |
4230 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
4231 | == FAILURE) | |
775e6c3a TB |
4232 | return MATCH_ERROR; |
4233 | goto next_item; | |
4234 | ||
4235 | case MATCH_NO: | |
4236 | break; | |
4237 | ||
4238 | case MATCH_ERROR: | |
4239 | return MATCH_ERROR; | |
4240 | } | |
4241 | ||
4242 | next_item: | |
4243 | if (gfc_match_eos () == MATCH_YES) | |
4244 | break; | |
4245 | if (gfc_match_char (',') != MATCH_YES) | |
4246 | goto syntax; | |
4247 | } | |
4248 | ||
4249 | return MATCH_YES; | |
4250 | ||
4251 | syntax: | |
4252 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
4253 | return MATCH_ERROR; | |
4254 | } | |
4255 | ||
4256 | ||
4257 | ||
6de9cd9a DN |
4258 | /* Match a module procedure statement. Note that we have to modify |
4259 | symbols in the parent's namespace because the current one was there | |
49de9e73 | 4260 | to receive symbols that are in an interface's formal argument list. */ |
6de9cd9a DN |
4261 | |
4262 | match | |
4263 | gfc_match_modproc (void) | |
4264 | { | |
4265 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4266 | gfc_symbol *sym; | |
4267 | match m; | |
4268 | ||
4269 | if (gfc_state_stack->state != COMP_INTERFACE | |
4270 | || gfc_state_stack->previous == NULL | |
4271 | || current_interface.type == INTERFACE_NAMELESS) | |
4272 | { | |
636dff67 SK |
4273 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
4274 | "interface"); | |
6de9cd9a DN |
4275 | return MATCH_ERROR; |
4276 | } | |
4277 | ||
4278 | for (;;) | |
4279 | { | |
4280 | m = gfc_match_name (name); | |
4281 | if (m == MATCH_NO) | |
4282 | goto syntax; | |
4283 | if (m != MATCH_YES) | |
4284 | return MATCH_ERROR; | |
4285 | ||
4286 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
4287 | return MATCH_ERROR; | |
4288 | ||
4289 | if (sym->attr.proc != PROC_MODULE | |
231b2fcc TS |
4290 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
4291 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
4292 | return MATCH_ERROR; |
4293 | ||
4294 | if (gfc_add_interface (sym) == FAILURE) | |
4295 | return MATCH_ERROR; | |
4296 | ||
71f77fd7 PT |
4297 | sym->attr.mod_proc = 1; |
4298 | ||
6de9cd9a DN |
4299 | if (gfc_match_eos () == MATCH_YES) |
4300 | break; | |
4301 | if (gfc_match_char (',') != MATCH_YES) | |
4302 | goto syntax; | |
4303 | } | |
4304 | ||
4305 | return MATCH_YES; | |
4306 | ||
4307 | syntax: | |
4308 | gfc_syntax_error (ST_MODULE_PROC); | |
4309 | return MATCH_ERROR; | |
4310 | } | |
4311 | ||
4312 | ||
4313 | /* Match the beginning of a derived type declaration. If a type name | |
4314 | was the result of a function, then it is possible to have a symbol | |
4315 | already to be known as a derived type yet have no components. */ | |
4316 | ||
4317 | match | |
4318 | gfc_match_derived_decl (void) | |
4319 | { | |
4320 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4321 | symbol_attribute attr; | |
4322 | gfc_symbol *sym; | |
4323 | match m; | |
4324 | ||
4325 | if (gfc_current_state () == COMP_DERIVED) | |
4326 | return MATCH_NO; | |
4327 | ||
4328 | gfc_clear_attr (&attr); | |
4329 | ||
4330 | loop: | |
4331 | if (gfc_match (" , private") == MATCH_YES) | |
4332 | { | |
4333 | if (gfc_find_state (COMP_MODULE) == FAILURE) | |
4334 | { | |
636dff67 | 4335 | gfc_error ("Derived type at %C can only be PRIVATE within a MODULE"); |
6de9cd9a DN |
4336 | return MATCH_ERROR; |
4337 | } | |
4338 | ||
231b2fcc | 4339 | if (gfc_add_access (&attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
6de9cd9a DN |
4340 | return MATCH_ERROR; |
4341 | goto loop; | |
4342 | } | |
4343 | ||
4344 | if (gfc_match (" , public") == MATCH_YES) | |
4345 | { | |
4346 | if (gfc_find_state (COMP_MODULE) == FAILURE) | |
4347 | { | |
4348 | gfc_error ("Derived type at %C can only be PUBLIC within a MODULE"); | |
4349 | return MATCH_ERROR; | |
4350 | } | |
4351 | ||
231b2fcc | 4352 | if (gfc_add_access (&attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
6de9cd9a DN |
4353 | return MATCH_ERROR; |
4354 | goto loop; | |
4355 | } | |
4356 | ||
4357 | if (gfc_match (" ::") != MATCH_YES && attr.access != ACCESS_UNKNOWN) | |
4358 | { | |
4359 | gfc_error ("Expected :: in TYPE definition at %C"); | |
4360 | return MATCH_ERROR; | |
4361 | } | |
4362 | ||
4363 | m = gfc_match (" %n%t", name); | |
4364 | if (m != MATCH_YES) | |
4365 | return m; | |
4366 | ||
4367 | /* Make sure the name isn't the name of an intrinsic type. The | |
4368 | 'double precision' type doesn't get past the name matcher. */ | |
4369 | if (strcmp (name, "integer") == 0 | |
4370 | || strcmp (name, "real") == 0 | |
4371 | || strcmp (name, "character") == 0 | |
4372 | || strcmp (name, "logical") == 0 | |
4373 | || strcmp (name, "complex") == 0) | |
4374 | { | |
636dff67 SK |
4375 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
4376 | "type", name); | |
6de9cd9a DN |
4377 | return MATCH_ERROR; |
4378 | } | |
4379 | ||
4380 | if (gfc_get_symbol (name, NULL, &sym)) | |
4381 | return MATCH_ERROR; | |
4382 | ||
4383 | if (sym->ts.type != BT_UNKNOWN) | |
4384 | { | |
4385 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
4386 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
4387 | return MATCH_ERROR; | |
4388 | } | |
4389 | ||
4390 | /* The symbol may already have the derived attribute without the | |
4391 | components. The ways this can happen is via a function | |
4392 | definition, an INTRINSIC statement or a subtype in another | |
4393 | derived type that is a pointer. The first part of the AND clause | |
f7b529fa | 4394 | is true if a the symbol is not the return value of a function. */ |
6de9cd9a | 4395 | if (sym->attr.flavor != FL_DERIVED |
231b2fcc | 4396 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
4397 | return MATCH_ERROR; |
4398 | ||
4399 | if (sym->components != NULL) | |
4400 | { | |
636dff67 SK |
4401 | gfc_error ("Derived type definition of '%s' at %C has already been " |
4402 | "defined", sym->name); | |
6de9cd9a DN |
4403 | return MATCH_ERROR; |
4404 | } | |
4405 | ||
4406 | if (attr.access != ACCESS_UNKNOWN | |
231b2fcc | 4407 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
4408 | return MATCH_ERROR; |
4409 | ||
4410 | gfc_new_block = sym; | |
4411 | ||
4412 | return MATCH_YES; | |
4413 | } | |
83d890b9 AL |
4414 | |
4415 | ||
4416 | /* Cray Pointees can be declared as: | |
4417 | pointer (ipt, a (n,m,...,*)) | |
4418 | By default, this is treated as an AS_ASSUMED_SIZE array. We'll | |
4419 | cheat and set a constant bound of 1 for the last dimension, if this | |
4420 | is the case. Since there is no bounds-checking for Cray Pointees, | |
4421 | this will be okay. */ | |
4422 | ||
4423 | try | |
4424 | gfc_mod_pointee_as (gfc_array_spec *as) | |
4425 | { | |
4426 | as->cray_pointee = true; /* This will be useful to know later. */ | |
4427 | if (as->type == AS_ASSUMED_SIZE) | |
4428 | { | |
4429 | as->type = AS_EXPLICIT; | |
4430 | as->upper[as->rank - 1] = gfc_int_expr (1); | |
4431 | as->cp_was_assumed = true; | |
4432 | } | |
4433 | else if (as->type == AS_ASSUMED_SHAPE) | |
4434 | { | |
4435 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
4436 | return MATCH_ERROR; | |
4437 | } | |
4438 | return MATCH_YES; | |
4439 | } | |
25d8f0a2 TS |
4440 | |
4441 | ||
4442 | /* Match the enum definition statement, here we are trying to match | |
4443 | the first line of enum definition statement. | |
4444 | Returns MATCH_YES if match is found. */ | |
4445 | ||
4446 | match | |
4447 | gfc_match_enum (void) | |
4448 | { | |
4449 | match m; | |
4450 | ||
4451 | m = gfc_match_eos (); | |
4452 | if (m != MATCH_YES) | |
4453 | return m; | |
4454 | ||
636dff67 | 4455 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM AND ENUMERATOR at %C") |
25d8f0a2 TS |
4456 | == FAILURE) |
4457 | return MATCH_ERROR; | |
4458 | ||
4459 | return MATCH_YES; | |
4460 | } | |
4461 | ||
4462 | ||
4463 | /* Match the enumerator definition statement. */ | |
4464 | ||
4465 | match | |
4466 | gfc_match_enumerator_def (void) | |
4467 | { | |
4468 | match m; | |
4469 | int elem; | |
4470 | ||
4471 | gfc_clear_ts (¤t_ts); | |
4472 | ||
4473 | m = gfc_match (" enumerator"); | |
4474 | if (m != MATCH_YES) | |
4475 | return m; | |
4476 | ||
4477 | if (gfc_current_state () != COMP_ENUM) | |
4478 | { | |
4479 | gfc_error ("ENUM definition statement expected before %C"); | |
4480 | gfc_free_enum_history (); | |
4481 | return MATCH_ERROR; | |
4482 | } | |
4483 | ||
4484 | (¤t_ts)->type = BT_INTEGER; | |
4485 | (¤t_ts)->kind = gfc_c_int_kind; | |
4486 | ||
4487 | m = match_attr_spec (); | |
4488 | if (m == MATCH_ERROR) | |
4489 | { | |
4490 | m = MATCH_NO; | |
4491 | goto cleanup; | |
4492 | } | |
4493 | ||
4494 | elem = 1; | |
4495 | for (;;) | |
4496 | { | |
4497 | m = variable_decl (elem++); | |
4498 | if (m == MATCH_ERROR) | |
4499 | goto cleanup; | |
4500 | if (m == MATCH_NO) | |
4501 | break; | |
4502 | ||
4503 | if (gfc_match_eos () == MATCH_YES) | |
4504 | goto cleanup; | |
4505 | if (gfc_match_char (',') != MATCH_YES) | |
4506 | break; | |
4507 | } | |
4508 | ||
4509 | if (gfc_current_state () == COMP_ENUM) | |
4510 | { | |
4511 | gfc_free_enum_history (); | |
4512 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
4513 | m = MATCH_ERROR; | |
4514 | } | |
4515 | ||
4516 | cleanup: | |
4517 | gfc_free_array_spec (current_as); | |
4518 | current_as = NULL; | |
4519 | return m; | |
4520 | ||
4521 | } | |
4522 |