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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; | |
36d3fb4c | 304 | locus old_loc; |
294fbfc8 TS |
305 | |
306 | m = gfc_match_literal_constant (&expr, 1); | |
307 | if (m == MATCH_YES) | |
308 | { | |
309 | *result = expr; | |
310 | return MATCH_YES; | |
311 | } | |
312 | ||
313 | if (m == MATCH_ERROR) | |
314 | return MATCH_ERROR; | |
315 | ||
316 | m = gfc_match_null (result); | |
317 | if (m != MATCH_NO) | |
318 | return m; | |
319 | ||
36d3fb4c PT |
320 | old_loc = gfc_current_locus; |
321 | ||
322 | /* Should this be a structure component, try to match it | |
323 | before matching a name. */ | |
324 | m = gfc_match_rvalue (result); | |
325 | if (m == MATCH_ERROR) | |
326 | return m; | |
327 | ||
328 | if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE) | |
329 | { | |
330 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
331 | m = MATCH_ERROR; | |
332 | return m; | |
333 | } | |
334 | ||
335 | gfc_current_locus = old_loc; | |
336 | ||
294fbfc8 TS |
337 | m = gfc_match_name (name); |
338 | if (m != MATCH_YES) | |
339 | return m; | |
340 | ||
341 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
342 | return MATCH_ERROR; | |
343 | ||
344 | if (sym == NULL | |
345 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
346 | { | |
347 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
348 | name); | |
349 | return MATCH_ERROR; | |
350 | } | |
351 | else if (sym->attr.flavor == FL_DERIVED) | |
352 | return gfc_match_structure_constructor (sym, result); | |
353 | ||
354 | *result = gfc_copy_expr (sym->value); | |
355 | return MATCH_YES; | |
356 | } | |
357 | ||
358 | ||
359 | /* Match a list of values in a DATA statement. The leading '/' has | |
360 | already been seen at this point. */ | |
361 | ||
362 | static match | |
636dff67 | 363 | top_val_list (gfc_data *data) |
294fbfc8 TS |
364 | { |
365 | gfc_data_value *new, *tail; | |
366 | gfc_expr *expr; | |
367 | const char *msg; | |
368 | match m; | |
369 | ||
370 | tail = NULL; | |
371 | ||
372 | for (;;) | |
373 | { | |
374 | m = match_data_constant (&expr); | |
375 | if (m == MATCH_NO) | |
376 | goto syntax; | |
377 | if (m == MATCH_ERROR) | |
378 | return MATCH_ERROR; | |
379 | ||
380 | new = gfc_get_data_value (); | |
381 | ||
382 | if (tail == NULL) | |
383 | data->value = new; | |
384 | else | |
385 | tail->next = new; | |
386 | ||
387 | tail = new; | |
388 | ||
389 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
390 | { | |
391 | tail->expr = expr; | |
392 | tail->repeat = 1; | |
393 | } | |
394 | else | |
395 | { | |
396 | signed int tmp; | |
397 | msg = gfc_extract_int (expr, &tmp); | |
398 | gfc_free_expr (expr); | |
399 | if (msg != NULL) | |
400 | { | |
401 | gfc_error (msg); | |
402 | return MATCH_ERROR; | |
403 | } | |
404 | tail->repeat = tmp; | |
405 | ||
406 | m = match_data_constant (&tail->expr); | |
407 | if (m == MATCH_NO) | |
408 | goto syntax; | |
409 | if (m == MATCH_ERROR) | |
410 | return MATCH_ERROR; | |
411 | } | |
412 | ||
413 | if (gfc_match_char ('/') == MATCH_YES) | |
414 | break; | |
415 | if (gfc_match_char (',') == MATCH_NO) | |
416 | goto syntax; | |
417 | } | |
418 | ||
419 | return MATCH_YES; | |
420 | ||
421 | syntax: | |
422 | gfc_syntax_error (ST_DATA); | |
a9f6f1f2 | 423 | gfc_free_data_all (gfc_current_ns); |
294fbfc8 TS |
424 | return MATCH_ERROR; |
425 | } | |
426 | ||
427 | ||
428 | /* Matches an old style initialization. */ | |
429 | ||
430 | static match | |
431 | match_old_style_init (const char *name) | |
432 | { | |
433 | match m; | |
434 | gfc_symtree *st; | |
ed0e3607 | 435 | gfc_symbol *sym; |
294fbfc8 TS |
436 | gfc_data *newdata; |
437 | ||
438 | /* Set up data structure to hold initializers. */ | |
439 | gfc_find_sym_tree (name, NULL, 0, &st); | |
ed0e3607 AL |
440 | sym = st->n.sym; |
441 | ||
294fbfc8 TS |
442 | newdata = gfc_get_data (); |
443 | newdata->var = gfc_get_data_variable (); | |
444 | newdata->var->expr = gfc_get_variable_expr (st); | |
8c5c0b80 | 445 | newdata->where = gfc_current_locus; |
294fbfc8 TS |
446 | |
447 | /* Match initial value list. This also eats the terminal | |
448 | '/'. */ | |
449 | m = top_val_list (newdata); | |
450 | if (m != MATCH_YES) | |
451 | { | |
452 | gfc_free (newdata); | |
453 | return m; | |
454 | } | |
455 | ||
456 | if (gfc_pure (NULL)) | |
457 | { | |
458 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
459 | gfc_free (newdata); | |
460 | return MATCH_ERROR; | |
461 | } | |
462 | ||
ed0e3607 AL |
463 | /* Mark the variable as having appeared in a data statement. */ |
464 | if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) | |
465 | { | |
466 | gfc_free (newdata); | |
467 | return MATCH_ERROR; | |
468 | } | |
469 | ||
294fbfc8 TS |
470 | /* Chain in namespace list of DATA initializers. */ |
471 | newdata->next = gfc_current_ns->data; | |
472 | gfc_current_ns->data = newdata; | |
473 | ||
474 | return m; | |
475 | } | |
476 | ||
636dff67 | 477 | |
294fbfc8 | 478 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
13795658 | 479 | we are matching a DATA statement and are therefore issuing an error |
294fbfc8 | 480 | if we encounter something unexpected, if not, we're trying to match |
69de3b83 | 481 | an old-style initialization expression of the form INTEGER I /2/. */ |
294fbfc8 TS |
482 | |
483 | match | |
484 | gfc_match_data (void) | |
485 | { | |
486 | gfc_data *new; | |
487 | match m; | |
488 | ||
2220652d PT |
489 | gfc_set_in_match_data (true); |
490 | ||
294fbfc8 TS |
491 | for (;;) |
492 | { | |
493 | new = gfc_get_data (); | |
494 | new->where = gfc_current_locus; | |
495 | ||
496 | m = top_var_list (new); | |
497 | if (m != MATCH_YES) | |
498 | goto cleanup; | |
499 | ||
500 | m = top_val_list (new); | |
501 | if (m != MATCH_YES) | |
502 | goto cleanup; | |
503 | ||
504 | new->next = gfc_current_ns->data; | |
505 | gfc_current_ns->data = new; | |
506 | ||
507 | if (gfc_match_eos () == MATCH_YES) | |
508 | break; | |
509 | ||
510 | gfc_match_char (','); /* Optional comma */ | |
511 | } | |
512 | ||
2220652d PT |
513 | gfc_set_in_match_data (false); |
514 | ||
294fbfc8 TS |
515 | if (gfc_pure (NULL)) |
516 | { | |
517 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
518 | return MATCH_ERROR; | |
519 | } | |
520 | ||
521 | return MATCH_YES; | |
522 | ||
523 | cleanup: | |
2220652d | 524 | gfc_set_in_match_data (false); |
294fbfc8 TS |
525 | gfc_free_data (new); |
526 | return MATCH_ERROR; | |
527 | } | |
528 | ||
529 | ||
530 | /************************ Declaration statements *********************/ | |
531 | ||
6de9cd9a DN |
532 | /* Match an intent specification. Since this can only happen after an |
533 | INTENT word, a legal intent-spec must follow. */ | |
534 | ||
535 | static sym_intent | |
536 | match_intent_spec (void) | |
537 | { | |
538 | ||
539 | if (gfc_match (" ( in out )") == MATCH_YES) | |
540 | return INTENT_INOUT; | |
541 | if (gfc_match (" ( in )") == MATCH_YES) | |
542 | return INTENT_IN; | |
543 | if (gfc_match (" ( out )") == MATCH_YES) | |
544 | return INTENT_OUT; | |
545 | ||
546 | gfc_error ("Bad INTENT specification at %C"); | |
547 | return INTENT_UNKNOWN; | |
548 | } | |
549 | ||
550 | ||
551 | /* Matches a character length specification, which is either a | |
552 | specification expression or a '*'. */ | |
553 | ||
554 | static match | |
636dff67 | 555 | char_len_param_value (gfc_expr **expr) |
6de9cd9a | 556 | { |
6de9cd9a DN |
557 | if (gfc_match_char ('*') == MATCH_YES) |
558 | { | |
559 | *expr = NULL; | |
560 | return MATCH_YES; | |
561 | } | |
562 | ||
563 | return gfc_match_expr (expr); | |
564 | } | |
565 | ||
566 | ||
567 | /* A character length is a '*' followed by a literal integer or a | |
568 | char_len_param_value in parenthesis. */ | |
569 | ||
570 | static match | |
636dff67 | 571 | match_char_length (gfc_expr **expr) |
6de9cd9a | 572 | { |
5cf54585 | 573 | int length; |
6de9cd9a DN |
574 | match m; |
575 | ||
576 | m = gfc_match_char ('*'); | |
577 | if (m != MATCH_YES) | |
578 | return m; | |
579 | ||
5cf54585 | 580 | m = gfc_match_small_literal_int (&length, NULL); |
6de9cd9a DN |
581 | if (m == MATCH_ERROR) |
582 | return m; | |
583 | ||
584 | if (m == MATCH_YES) | |
585 | { | |
586 | *expr = gfc_int_expr (length); | |
587 | return m; | |
588 | } | |
589 | ||
590 | if (gfc_match_char ('(') == MATCH_NO) | |
591 | goto syntax; | |
592 | ||
593 | m = char_len_param_value (expr); | |
594 | if (m == MATCH_ERROR) | |
595 | return m; | |
596 | if (m == MATCH_NO) | |
597 | goto syntax; | |
598 | ||
599 | if (gfc_match_char (')') == MATCH_NO) | |
600 | { | |
601 | gfc_free_expr (*expr); | |
602 | *expr = NULL; | |
603 | goto syntax; | |
604 | } | |
605 | ||
606 | return MATCH_YES; | |
607 | ||
608 | syntax: | |
609 | gfc_error ("Syntax error in character length specification at %C"); | |
610 | return MATCH_ERROR; | |
611 | } | |
612 | ||
613 | ||
9e35b386 EE |
614 | /* Special subroutine for finding a symbol. Check if the name is found |
615 | in the current name space. If not, and we're compiling a function or | |
616 | subroutine and the parent compilation unit is an interface, then check | |
617 | to see if the name we've been given is the name of the interface | |
618 | (located in another namespace). */ | |
6de9cd9a DN |
619 | |
620 | static int | |
636dff67 | 621 | find_special (const char *name, gfc_symbol **result) |
6de9cd9a DN |
622 | { |
623 | gfc_state_data *s; | |
9e35b386 | 624 | int i; |
6de9cd9a | 625 | |
9e35b386 | 626 | i = gfc_get_symbol (name, NULL, result); |
636dff67 | 627 | if (i == 0) |
9e35b386 EE |
628 | goto end; |
629 | ||
6de9cd9a DN |
630 | if (gfc_current_state () != COMP_SUBROUTINE |
631 | && gfc_current_state () != COMP_FUNCTION) | |
9e35b386 | 632 | goto end; |
6de9cd9a DN |
633 | |
634 | s = gfc_state_stack->previous; | |
635 | if (s == NULL) | |
9e35b386 | 636 | goto end; |
6de9cd9a DN |
637 | |
638 | if (s->state != COMP_INTERFACE) | |
9e35b386 | 639 | goto end; |
6de9cd9a | 640 | if (s->sym == NULL) |
636dff67 | 641 | goto end; /* Nameless interface */ |
6de9cd9a DN |
642 | |
643 | if (strcmp (name, s->sym->name) == 0) | |
644 | { | |
645 | *result = s->sym; | |
646 | return 0; | |
647 | } | |
648 | ||
9e35b386 EE |
649 | end: |
650 | return i; | |
6de9cd9a DN |
651 | } |
652 | ||
653 | ||
654 | /* Special subroutine for getting a symbol node associated with a | |
655 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
656 | symbol is created in the parent using with symtree node in the | |
657 | child unit pointing to the symbol. If the current namespace has no | |
658 | parent, then the symbol is just created in the current unit. */ | |
659 | ||
660 | static int | |
636dff67 | 661 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
6de9cd9a DN |
662 | { |
663 | gfc_symtree *st; | |
664 | gfc_symbol *sym; | |
665 | int rc; | |
666 | ||
1a492601 PT |
667 | /* Module functions have to be left in their own namespace because |
668 | they have potentially (almost certainly!) already been referenced. | |
669 | In this sense, they are rather like external functions. This is | |
670 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
671 | space is set to point to the master function, so that the fake | |
672 | result mechanism can work. */ | |
673 | if (module_fcn_entry) | |
68ea355b PT |
674 | rc = gfc_get_symbol (name, NULL, result); |
675 | else | |
676 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
6de9cd9a | 677 | |
68ea355b | 678 | sym = *result; |
2c693a24 | 679 | gfc_current_ns->refs++; |
6de9cd9a | 680 | |
68ea355b PT |
681 | if (sym && !sym->new && gfc_current_state () != COMP_INTERFACE) |
682 | { | |
cda7004b PT |
683 | /* Trap another encompassed procedure with the same name. All |
684 | these conditions are necessary to avoid picking up an entry | |
685 | whose name clashes with that of the encompassing procedure; | |
686 | this is handled using gsymbols to register unique,globally | |
687 | accessible names. */ | |
68ea355b | 688 | if (sym->attr.flavor != 0 |
636dff67 SK |
689 | && sym->attr.proc != 0 |
690 | && (sym->attr.subroutine || sym->attr.function) | |
691 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
68ea355b PT |
692 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
693 | name, &sym->declared_at); | |
694 | ||
695 | /* Trap declarations of attributes in encompassing scope. The | |
696 | signature for this is that ts.kind is set. Legitimate | |
697 | references only set ts.type. */ | |
698 | if (sym->ts.kind != 0 | |
636dff67 SK |
699 | && !sym->attr.implicit_type |
700 | && sym->attr.proc == 0 | |
701 | && gfc_current_ns->parent != NULL | |
702 | && sym->attr.access == 0 | |
703 | && !module_fcn_entry) | |
704 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
705 | "and must not have attributes declared at %L", | |
68ea355b PT |
706 | name, &sym->declared_at); |
707 | } | |
708 | ||
709 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
710 | return rc; | |
6de9cd9a | 711 | |
1a492601 PT |
712 | /* Module function entries will already have a symtree in |
713 | the current namespace but will need one at module level. */ | |
714 | if (module_fcn_entry) | |
715 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
716 | else | |
717 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
6de9cd9a | 718 | |
6de9cd9a DN |
719 | st->n.sym = sym; |
720 | sym->refs++; | |
721 | ||
722 | /* See if the procedure should be a module procedure */ | |
723 | ||
1a492601 | 724 | if (((sym->ns->proc_name != NULL |
636dff67 SK |
725 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
726 | && sym->attr.proc != PROC_MODULE) || module_fcn_entry) | |
727 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
728 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
729 | rc = 2; |
730 | ||
731 | return rc; | |
732 | } | |
733 | ||
734 | ||
735 | /* Function called by variable_decl() that adds a name to the symbol | |
736 | table. */ | |
737 | ||
738 | static try | |
636dff67 SK |
739 | build_sym (const char *name, gfc_charlen *cl, |
740 | gfc_array_spec **as, locus *var_locus) | |
6de9cd9a DN |
741 | { |
742 | symbol_attribute attr; | |
743 | gfc_symbol *sym; | |
744 | ||
9e35b386 | 745 | if (gfc_get_symbol (name, NULL, &sym)) |
6de9cd9a DN |
746 | return FAILURE; |
747 | ||
748 | /* Start updating the symbol table. Add basic type attribute | |
749 | if present. */ | |
750 | if (current_ts.type != BT_UNKNOWN | |
636dff67 SK |
751 | && (sym->attr.implicit_type == 0 |
752 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
6de9cd9a DN |
753 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
754 | return FAILURE; | |
755 | ||
756 | if (sym->ts.type == BT_CHARACTER) | |
757 | sym->ts.cl = cl; | |
758 | ||
759 | /* Add dimension attribute if present. */ | |
760 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
761 | return FAILURE; | |
762 | *as = NULL; | |
763 | ||
764 | /* Add attribute to symbol. The copy is so that we can reset the | |
765 | dimension attribute. */ | |
766 | attr = current_attr; | |
767 | attr.dimension = 0; | |
768 | ||
769 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
770 | return FAILURE; | |
771 | ||
772 | return SUCCESS; | |
773 | } | |
774 | ||
636dff67 | 775 | |
df7cc9b5 FW |
776 | /* Set character constant to the given length. The constant will be padded or |
777 | truncated. */ | |
778 | ||
779 | void | |
636dff67 | 780 | gfc_set_constant_character_len (int len, gfc_expr *expr, bool array) |
df7cc9b5 | 781 | { |
636dff67 | 782 | char *s; |
df7cc9b5 FW |
783 | int slen; |
784 | ||
785 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
786 | gcc_assert (expr->ts.type == BT_CHARACTER && expr->ts.kind == 1); | |
787 | ||
788 | slen = expr->value.character.length; | |
789 | if (len != slen) | |
790 | { | |
150675a8 | 791 | s = gfc_getmem (len + 1); |
df7cc9b5 FW |
792 | memcpy (s, expr->value.character.string, MIN (len, slen)); |
793 | if (len > slen) | |
794 | memset (&s[slen], ' ', len - slen); | |
2220652d PT |
795 | |
796 | if (gfc_option.warn_character_truncation && slen > len) | |
797 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
798 | "(%d/%d)", &expr->where, slen, len); | |
799 | ||
800 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
801 | initializers. */ | |
802 | if (array && slen < len && !(gfc_option.allow_std & GFC_STD_GNU)) | |
803 | gfc_error_now ("The CHARACTER elements of the array constructor " | |
804 | "at %L must have the same length (%d/%d)", | |
636dff67 | 805 | &expr->where, slen, len); |
2220652d | 806 | |
150675a8 | 807 | s[len] = '\0'; |
df7cc9b5 FW |
808 | gfc_free (expr->value.character.string); |
809 | expr->value.character.string = s; | |
810 | expr->value.character.length = len; | |
811 | } | |
812 | } | |
6de9cd9a | 813 | |
25d8f0a2 | 814 | |
831d7813 | 815 | /* Function to create and update the enumerator history |
25d8f0a2 TS |
816 | using the information passed as arguments. |
817 | Pointer "max_enum" is also updated, to point to | |
818 | enum history node containing largest initializer. | |
819 | ||
820 | SYM points to the symbol node of enumerator. | |
821 | INIT points to its enumerator value. */ | |
822 | ||
823 | static void | |
636dff67 | 824 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
25d8f0a2 TS |
825 | { |
826 | enumerator_history *new_enum_history; | |
827 | gcc_assert (sym != NULL && init != NULL); | |
828 | ||
829 | new_enum_history = gfc_getmem (sizeof (enumerator_history)); | |
830 | ||
831 | new_enum_history->sym = sym; | |
832 | new_enum_history->initializer = init; | |
833 | new_enum_history->next = NULL; | |
834 | ||
835 | if (enum_history == NULL) | |
836 | { | |
837 | enum_history = new_enum_history; | |
838 | max_enum = enum_history; | |
839 | } | |
840 | else | |
841 | { | |
842 | new_enum_history->next = enum_history; | |
843 | enum_history = new_enum_history; | |
844 | ||
845 | if (mpz_cmp (max_enum->initializer->value.integer, | |
846 | new_enum_history->initializer->value.integer) < 0) | |
636dff67 | 847 | max_enum = new_enum_history; |
25d8f0a2 TS |
848 | } |
849 | } | |
850 | ||
851 | ||
852 | /* Function to free enum kind history. */ | |
853 | ||
854 | void | |
636dff67 | 855 | gfc_free_enum_history (void) |
25d8f0a2 TS |
856 | { |
857 | enumerator_history *current = enum_history; | |
858 | enumerator_history *next; | |
859 | ||
860 | while (current != NULL) | |
861 | { | |
862 | next = current->next; | |
863 | gfc_free (current); | |
864 | current = next; | |
865 | } | |
866 | max_enum = NULL; | |
867 | enum_history = NULL; | |
868 | } | |
869 | ||
870 | ||
6de9cd9a DN |
871 | /* Function called by variable_decl() that adds an initialization |
872 | expression to a symbol. */ | |
873 | ||
874 | static try | |
636dff67 SK |
875 | add_init_expr_to_sym (const char *name, gfc_expr **initp, |
876 | locus *var_locus) | |
6de9cd9a DN |
877 | { |
878 | symbol_attribute attr; | |
879 | gfc_symbol *sym; | |
880 | gfc_expr *init; | |
881 | ||
882 | init = *initp; | |
883 | if (find_special (name, &sym)) | |
884 | return FAILURE; | |
885 | ||
886 | attr = sym->attr; | |
887 | ||
888 | /* If this symbol is confirming an implicit parameter type, | |
889 | then an initialization expression is not allowed. */ | |
890 | if (attr.flavor == FL_PARAMETER | |
891 | && sym->value != NULL | |
892 | && *initp != NULL) | |
893 | { | |
894 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
895 | sym->name); | |
896 | return FAILURE; | |
897 | } | |
898 | ||
c8e20bd0 TS |
899 | if (attr.in_common |
900 | && !attr.data | |
901 | && *initp != NULL) | |
902 | { | |
903 | gfc_error ("Initializer not allowed for COMMON variable '%s' at %C", | |
904 | sym->name); | |
905 | return FAILURE; | |
906 | } | |
907 | ||
6de9cd9a DN |
908 | if (init == NULL) |
909 | { | |
910 | /* An initializer is required for PARAMETER declarations. */ | |
911 | if (attr.flavor == FL_PARAMETER) | |
912 | { | |
913 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
914 | return FAILURE; | |
915 | } | |
916 | } | |
917 | else | |
918 | { | |
919 | /* If a variable appears in a DATA block, it cannot have an | |
1de8a836 | 920 | initializer. */ |
6de9cd9a DN |
921 | if (sym->attr.data) |
922 | { | |
636dff67 SK |
923 | gfc_error ("Variable '%s' at %C with an initializer already " |
924 | "appears in a DATA statement", sym->name); | |
6de9cd9a DN |
925 | return FAILURE; |
926 | } | |
927 | ||
75d17889 TS |
928 | /* Check if the assignment can happen. This has to be put off |
929 | until later for a derived type variable. */ | |
6de9cd9a DN |
930 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
931 | && gfc_check_assign_symbol (sym, init) == FAILURE) | |
932 | return FAILURE; | |
933 | ||
df7cc9b5 FW |
934 | if (sym->ts.type == BT_CHARACTER && sym->ts.cl) |
935 | { | |
936 | /* Update symbol character length according initializer. */ | |
937 | if (sym->ts.cl->length == NULL) | |
938 | { | |
4213f93b PT |
939 | /* If there are multiple CHARACTER variables declared on |
940 | the same line, we don't want them to share the same | |
636dff67 | 941 | length. */ |
4213f93b PT |
942 | sym->ts.cl = gfc_get_charlen (); |
943 | sym->ts.cl->next = gfc_current_ns->cl_list; | |
944 | gfc_current_ns->cl_list = sym->ts.cl; | |
96f4873b PT |
945 | |
946 | if (sym->attr.flavor == FL_PARAMETER | |
636dff67 | 947 | && init->expr_type == EXPR_ARRAY) |
96f4873b | 948 | sym->ts.cl->length = gfc_copy_expr (init->ts.cl->length); |
df7cc9b5 FW |
949 | } |
950 | /* Update initializer character length according symbol. */ | |
951 | else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT) | |
952 | { | |
953 | int len = mpz_get_si (sym->ts.cl->length->value.integer); | |
954 | gfc_constructor * p; | |
955 | ||
956 | if (init->expr_type == EXPR_CONSTANT) | |
2220652d | 957 | gfc_set_constant_character_len (len, init, false); |
df7cc9b5 FW |
958 | else if (init->expr_type == EXPR_ARRAY) |
959 | { | |
dcdc7b6c PT |
960 | /* Build a new charlen to prevent simplification from |
961 | deleting the length before it is resolved. */ | |
962 | init->ts.cl = gfc_get_charlen (); | |
963 | init->ts.cl->next = gfc_current_ns->cl_list; | |
964 | gfc_current_ns->cl_list = sym->ts.cl; | |
df7cc9b5 | 965 | init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length); |
dcdc7b6c | 966 | |
df7cc9b5 | 967 | for (p = init->value.constructor; p; p = p->next) |
2220652d | 968 | gfc_set_constant_character_len (len, p->expr, false); |
df7cc9b5 FW |
969 | } |
970 | } | |
971 | } | |
972 | ||
6de9cd9a DN |
973 | /* Add initializer. Make sure we keep the ranks sane. */ |
974 | if (sym->attr.dimension && init->rank == 0) | |
975 | init->rank = sym->as->rank; | |
976 | ||
977 | sym->value = init; | |
978 | *initp = NULL; | |
979 | } | |
980 | ||
981 | return SUCCESS; | |
982 | } | |
983 | ||
984 | ||
985 | /* Function called by variable_decl() that adds a name to a structure | |
986 | being built. */ | |
987 | ||
988 | static try | |
636dff67 SK |
989 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
990 | gfc_array_spec **as) | |
6de9cd9a DN |
991 | { |
992 | gfc_component *c; | |
993 | ||
994 | /* If the current symbol is of the same derived type that we're | |
995 | constructing, it must have the pointer attribute. */ | |
996 | if (current_ts.type == BT_DERIVED | |
997 | && current_ts.derived == gfc_current_block () | |
998 | && current_attr.pointer == 0) | |
999 | { | |
1000 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1001 | return FAILURE; | |
1002 | } | |
1003 | ||
636dff67 | 1004 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
6de9cd9a DN |
1005 | { |
1006 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1007 | { | |
1008 | gfc_error ("Array component of structure at %C must have explicit " | |
1009 | "or deferred shape"); | |
1010 | return FAILURE; | |
1011 | } | |
1012 | } | |
1013 | ||
1014 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1015 | return FAILURE; | |
1016 | ||
1017 | c->ts = current_ts; | |
1018 | c->ts.cl = cl; | |
1019 | gfc_set_component_attr (c, ¤t_attr); | |
1020 | ||
1021 | c->initializer = *init; | |
1022 | *init = NULL; | |
1023 | ||
1024 | c->as = *as; | |
1025 | if (c->as != NULL) | |
1026 | c->dimension = 1; | |
1027 | *as = NULL; | |
1028 | ||
1029 | /* Check array components. */ | |
1030 | if (!c->dimension) | |
5046aff5 PT |
1031 | { |
1032 | if (c->allocatable) | |
1033 | { | |
1034 | gfc_error ("Allocatable component at %C must be an array"); | |
1035 | return FAILURE; | |
1036 | } | |
1037 | else | |
1038 | return SUCCESS; | |
1039 | } | |
6de9cd9a DN |
1040 | |
1041 | if (c->pointer) | |
1042 | { | |
1043 | if (c->as->type != AS_DEFERRED) | |
1044 | { | |
5046aff5 PT |
1045 | gfc_error ("Pointer array component of structure at %C must have a " |
1046 | "deferred shape"); | |
1047 | return FAILURE; | |
1048 | } | |
1049 | } | |
1050 | else if (c->allocatable) | |
1051 | { | |
1052 | if (c->as->type != AS_DEFERRED) | |
1053 | { | |
1054 | gfc_error ("Allocatable component of structure at %C must have a " | |
1055 | "deferred shape"); | |
6de9cd9a DN |
1056 | return FAILURE; |
1057 | } | |
1058 | } | |
1059 | else | |
1060 | { | |
1061 | if (c->as->type != AS_EXPLICIT) | |
1062 | { | |
636dff67 SK |
1063 | gfc_error ("Array component of structure at %C must have an " |
1064 | "explicit shape"); | |
6de9cd9a DN |
1065 | return FAILURE; |
1066 | } | |
1067 | } | |
1068 | ||
1069 | return SUCCESS; | |
1070 | } | |
1071 | ||
1072 | ||
1073 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1074 | ||
1075 | match | |
636dff67 | 1076 | gfc_match_null (gfc_expr **result) |
6de9cd9a DN |
1077 | { |
1078 | gfc_symbol *sym; | |
1079 | gfc_expr *e; | |
1080 | match m; | |
1081 | ||
1082 | m = gfc_match (" null ( )"); | |
1083 | if (m != MATCH_YES) | |
1084 | return m; | |
1085 | ||
1086 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1087 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1088 | { | |
1089 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1090 | return MATCH_ERROR; | |
1091 | } | |
1092 | ||
1093 | gfc_intrinsic_symbol (sym); | |
1094 | ||
1095 | if (sym->attr.proc != PROC_INTRINSIC | |
231b2fcc TS |
1096 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1097 | sym->name, NULL) == FAILURE | |
1098 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
6de9cd9a DN |
1099 | return MATCH_ERROR; |
1100 | ||
1101 | e = gfc_get_expr (); | |
63645982 | 1102 | e->where = gfc_current_locus; |
6de9cd9a DN |
1103 | e->expr_type = EXPR_NULL; |
1104 | e->ts.type = BT_UNKNOWN; | |
1105 | ||
1106 | *result = e; | |
1107 | ||
1108 | return MATCH_YES; | |
1109 | } | |
1110 | ||
1111 | ||
6de9cd9a DN |
1112 | /* Match a variable name with an optional initializer. When this |
1113 | subroutine is called, a variable is expected to be parsed next. | |
1114 | Depending on what is happening at the moment, updates either the | |
1115 | symbol table or the current interface. */ | |
1116 | ||
1117 | static match | |
949d5b72 | 1118 | variable_decl (int elem) |
6de9cd9a DN |
1119 | { |
1120 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1121 | gfc_expr *initializer, *char_len; | |
1122 | gfc_array_spec *as; | |
83d890b9 | 1123 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
6de9cd9a DN |
1124 | gfc_charlen *cl; |
1125 | locus var_locus; | |
1126 | match m; | |
1127 | try t; | |
83d890b9 | 1128 | gfc_symbol *sym; |
25d8f0a2 | 1129 | locus old_locus; |
6de9cd9a DN |
1130 | |
1131 | initializer = NULL; | |
1132 | as = NULL; | |
83d890b9 | 1133 | cp_as = NULL; |
25d8f0a2 | 1134 | old_locus = gfc_current_locus; |
6de9cd9a DN |
1135 | |
1136 | /* When we get here, we've just matched a list of attributes and | |
1137 | maybe a type and a double colon. The next thing we expect to see | |
1138 | is the name of the symbol. */ | |
1139 | m = gfc_match_name (name); | |
1140 | if (m != MATCH_YES) | |
1141 | goto cleanup; | |
1142 | ||
63645982 | 1143 | var_locus = gfc_current_locus; |
6de9cd9a DN |
1144 | |
1145 | /* Now we could see the optional array spec. or character length. */ | |
1146 | m = gfc_match_array_spec (&as); | |
83d890b9 AL |
1147 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1148 | cp_as = gfc_copy_array_spec (as); | |
1149 | else if (m == MATCH_ERROR) | |
6de9cd9a | 1150 | goto cleanup; |
25d8f0a2 | 1151 | |
6de9cd9a DN |
1152 | if (m == MATCH_NO) |
1153 | as = gfc_copy_array_spec (current_as); | |
1154 | ||
1155 | char_len = NULL; | |
1156 | cl = NULL; | |
1157 | ||
1158 | if (current_ts.type == BT_CHARACTER) | |
1159 | { | |
1160 | switch (match_char_length (&char_len)) | |
1161 | { | |
1162 | case MATCH_YES: | |
1163 | cl = gfc_get_charlen (); | |
1164 | cl->next = gfc_current_ns->cl_list; | |
1165 | gfc_current_ns->cl_list = cl; | |
1166 | ||
1167 | cl->length = char_len; | |
1168 | break; | |
1169 | ||
949d5b72 PT |
1170 | /* Non-constant lengths need to be copied after the first |
1171 | element. */ | |
6de9cd9a | 1172 | case MATCH_NO: |
949d5b72 | 1173 | if (elem > 1 && current_ts.cl->length |
636dff67 | 1174 | && current_ts.cl->length->expr_type != EXPR_CONSTANT) |
949d5b72 PT |
1175 | { |
1176 | cl = gfc_get_charlen (); | |
1177 | cl->next = gfc_current_ns->cl_list; | |
1178 | gfc_current_ns->cl_list = cl; | |
1179 | cl->length = gfc_copy_expr (current_ts.cl->length); | |
1180 | } | |
1181 | else | |
1182 | cl = current_ts.cl; | |
1183 | ||
6de9cd9a DN |
1184 | break; |
1185 | ||
1186 | case MATCH_ERROR: | |
1187 | goto cleanup; | |
1188 | } | |
1189 | } | |
1190 | ||
83d890b9 AL |
1191 | /* If this symbol has already shown up in a Cray Pointer declaration, |
1192 | then we want to set the type & bail out. */ | |
1193 | if (gfc_option.flag_cray_pointer) | |
1194 | { | |
1195 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1196 | if (sym != NULL && sym->attr.cray_pointee) | |
1197 | { | |
1198 | sym->ts.type = current_ts.type; | |
1199 | sym->ts.kind = current_ts.kind; | |
1200 | sym->ts.cl = cl; | |
1201 | sym->ts.derived = current_ts.derived; | |
1202 | m = MATCH_YES; | |
1203 | ||
1204 | /* Check to see if we have an array specification. */ | |
1205 | if (cp_as != NULL) | |
1206 | { | |
1207 | if (sym->as != NULL) | |
1208 | { | |
e25a0da3 | 1209 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
83d890b9 AL |
1210 | gfc_free_array_spec (cp_as); |
1211 | m = MATCH_ERROR; | |
1212 | goto cleanup; | |
1213 | } | |
1214 | else | |
1215 | { | |
1216 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1217 | gfc_internal_error ("Couldn't set pointee array spec."); | |
1218 | ||
1219 | /* Fix the array spec. */ | |
1220 | m = gfc_mod_pointee_as (sym->as); | |
1221 | if (m == MATCH_ERROR) | |
1222 | goto cleanup; | |
1223 | } | |
1224 | } | |
1225 | goto cleanup; | |
1226 | } | |
1227 | else | |
1228 | { | |
1229 | gfc_free_array_spec (cp_as); | |
1230 | } | |
1231 | } | |
1232 | ||
1233 | ||
6de9cd9a DN |
1234 | /* OK, we've successfully matched the declaration. Now put the |
1235 | symbol in the current namespace, because it might be used in the | |
69de3b83 | 1236 | optional initialization expression for this symbol, e.g. this is |
6de9cd9a DN |
1237 | perfectly legal: |
1238 | ||
1239 | integer, parameter :: i = huge(i) | |
1240 | ||
1241 | This is only true for parameters or variables of a basic type. | |
1242 | For components of derived types, it is not true, so we don't | |
1243 | create a symbol for those yet. If we fail to create the symbol, | |
1244 | bail out. */ | |
1245 | if (gfc_current_state () != COMP_DERIVED | |
1246 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1247 | { | |
72af9f0b PT |
1248 | m = MATCH_ERROR; |
1249 | goto cleanup; | |
1250 | } | |
1251 | ||
6133c68a TS |
1252 | /* An interface body specifies all of the procedure's |
1253 | characteristics and these shall be consistent with those | |
1254 | specified in the procedure definition, except that the interface | |
1255 | may specify a procedure that is not pure if the procedure is | |
1256 | defined to be pure(12.3.2). */ | |
72af9f0b | 1257 | if (current_ts.type == BT_DERIVED |
636dff67 SK |
1258 | && gfc_current_ns->proc_name |
1259 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
1260 | && current_ts.derived->ns != gfc_current_ns | |
1261 | && !gfc_current_ns->has_import_set) | |
72af9f0b PT |
1262 | { |
1263 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1264 | "interface", name); | |
6de9cd9a DN |
1265 | m = MATCH_ERROR; |
1266 | goto cleanup; | |
1267 | } | |
1268 | ||
1269 | /* In functions that have a RESULT variable defined, the function | |
1270 | name always refers to function calls. Therefore, the name is | |
1271 | not allowed to appear in specification statements. */ | |
1272 | if (gfc_current_state () == COMP_FUNCTION | |
1273 | && gfc_current_block () != NULL | |
1274 | && gfc_current_block ()->result != NULL | |
1275 | && gfc_current_block ()->result != gfc_current_block () | |
1276 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1277 | { | |
1278 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1279 | m = MATCH_ERROR; | |
1280 | goto cleanup; | |
1281 | } | |
1282 | ||
294fbfc8 TS |
1283 | /* We allow old-style initializations of the form |
1284 | integer i /2/, j(4) /3*3, 1/ | |
1285 | (if no colon has been seen). These are different from data | |
1286 | statements in that initializers are only allowed to apply to the | |
1287 | variable immediately preceding, i.e. | |
1288 | integer i, j /1, 2/ | |
1289 | is not allowed. Therefore we have to do some work manually, that | |
75d17889 | 1290 | could otherwise be left to the matchers for DATA statements. */ |
294fbfc8 TS |
1291 | |
1292 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1293 | { | |
1294 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1295 | "initialization at %C") == FAILURE) | |
1296 | return MATCH_ERROR; | |
1297 | ||
1298 | return match_old_style_init (name); | |
1299 | } | |
1300 | ||
6de9cd9a DN |
1301 | /* The double colon must be present in order to have initializers. |
1302 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1303 | if (colon_seen) | |
1304 | { | |
1305 | if (gfc_match (" =>") == MATCH_YES) | |
1306 | { | |
6de9cd9a DN |
1307 | if (!current_attr.pointer) |
1308 | { | |
1309 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1310 | m = MATCH_ERROR; | |
1311 | goto cleanup; | |
1312 | } | |
1313 | ||
1314 | m = gfc_match_null (&initializer); | |
1315 | if (m == MATCH_NO) | |
1316 | { | |
def66134 | 1317 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
6de9cd9a DN |
1318 | m = MATCH_ERROR; |
1319 | } | |
1320 | ||
1321 | if (gfc_pure (NULL)) | |
1322 | { | |
636dff67 SK |
1323 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1324 | "a PURE procedure"); | |
6de9cd9a DN |
1325 | m = MATCH_ERROR; |
1326 | } | |
1327 | ||
1328 | if (m != MATCH_YES) | |
1329 | goto cleanup; | |
1330 | ||
6de9cd9a DN |
1331 | } |
1332 | else if (gfc_match_char ('=') == MATCH_YES) | |
1333 | { | |
1334 | if (current_attr.pointer) | |
1335 | { | |
636dff67 SK |
1336 | gfc_error ("Pointer initialization at %C requires '=>', " |
1337 | "not '='"); | |
6de9cd9a DN |
1338 | m = MATCH_ERROR; |
1339 | goto cleanup; | |
1340 | } | |
1341 | ||
1342 | m = gfc_match_init_expr (&initializer); | |
1343 | if (m == MATCH_NO) | |
1344 | { | |
1345 | gfc_error ("Expected an initialization expression at %C"); | |
1346 | m = MATCH_ERROR; | |
1347 | } | |
1348 | ||
1349 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1350 | { | |
636dff67 SK |
1351 | gfc_error ("Initialization of variable at %C is not allowed in " |
1352 | "a PURE procedure"); | |
6de9cd9a DN |
1353 | m = MATCH_ERROR; |
1354 | } | |
1355 | ||
1356 | if (m != MATCH_YES) | |
1357 | goto cleanup; | |
1358 | } | |
cb44ab82 VL |
1359 | } |
1360 | ||
5046aff5 PT |
1361 | if (initializer != NULL && current_attr.allocatable |
1362 | && gfc_current_state () == COMP_DERIVED) | |
1363 | { | |
636dff67 SK |
1364 | gfc_error ("Initialization of allocatable component at %C is not " |
1365 | "allowed"); | |
5046aff5 PT |
1366 | m = MATCH_ERROR; |
1367 | goto cleanup; | |
1368 | } | |
1369 | ||
54b4ba60 | 1370 | /* Add the initializer. Note that it is fine if initializer is |
6de9cd9a DN |
1371 | NULL here, because we sometimes also need to check if a |
1372 | declaration *must* have an initialization expression. */ | |
1373 | if (gfc_current_state () != COMP_DERIVED) | |
1374 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1375 | else | |
54b4ba60 | 1376 | { |
5046aff5 | 1377 | if (current_ts.type == BT_DERIVED |
636dff67 | 1378 | && !current_attr.pointer && !initializer) |
54b4ba60 PB |
1379 | initializer = gfc_default_initializer (¤t_ts); |
1380 | t = build_struct (name, cl, &initializer, &as); | |
1381 | } | |
6de9cd9a DN |
1382 | |
1383 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1384 | ||
1385 | cleanup: | |
1386 | /* Free stuff up and return. */ | |
1387 | gfc_free_expr (initializer); | |
1388 | gfc_free_array_spec (as); | |
1389 | ||
1390 | return m; | |
1391 | } | |
1392 | ||
1393 | ||
b2b81a3f BM |
1394 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
1395 | This assumes that the byte size is equal to the kind number for | |
1396 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
6de9cd9a DN |
1397 | |
1398 | match | |
636dff67 | 1399 | gfc_match_old_kind_spec (gfc_typespec *ts) |
6de9cd9a DN |
1400 | { |
1401 | match m; | |
5cf54585 | 1402 | int original_kind; |
6de9cd9a DN |
1403 | |
1404 | if (gfc_match_char ('*') != MATCH_YES) | |
1405 | return MATCH_NO; | |
1406 | ||
5cf54585 | 1407 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
6de9cd9a DN |
1408 | if (m != MATCH_YES) |
1409 | return MATCH_ERROR; | |
1410 | ||
e45b3c75 ES |
1411 | original_kind = ts->kind; |
1412 | ||
6de9cd9a | 1413 | /* Massage the kind numbers for complex types. */ |
e45b3c75 ES |
1414 | if (ts->type == BT_COMPLEX) |
1415 | { | |
1416 | if (ts->kind % 2) | |
636dff67 SK |
1417 | { |
1418 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1419 | gfc_basic_typename (ts->type), original_kind); | |
1420 | return MATCH_ERROR; | |
1421 | } | |
e45b3c75 ES |
1422 | ts->kind /= 2; |
1423 | } | |
6de9cd9a | 1424 | |
e7a2d5fb | 1425 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a | 1426 | { |
e45b3c75 | 1427 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
636dff67 | 1428 | gfc_basic_typename (ts->type), original_kind); |
6de9cd9a DN |
1429 | return MATCH_ERROR; |
1430 | } | |
1431 | ||
df8652dc SK |
1432 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
1433 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1434 | return MATCH_ERROR; | |
1435 | ||
6de9cd9a DN |
1436 | return MATCH_YES; |
1437 | } | |
1438 | ||
1439 | ||
1440 | /* Match a kind specification. Since kinds are generally optional, we | |
1441 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1442 | string is found, then we know we have an error. */ | |
1443 | ||
1444 | match | |
636dff67 | 1445 | gfc_match_kind_spec (gfc_typespec *ts) |
6de9cd9a DN |
1446 | { |
1447 | locus where; | |
1448 | gfc_expr *e; | |
1449 | match m, n; | |
1450 | const char *msg; | |
1451 | ||
1452 | m = MATCH_NO; | |
1453 | e = NULL; | |
1454 | ||
63645982 | 1455 | where = gfc_current_locus; |
6de9cd9a DN |
1456 | |
1457 | if (gfc_match_char ('(') == MATCH_NO) | |
1458 | return MATCH_NO; | |
1459 | ||
1460 | /* Also gobbles optional text. */ | |
1461 | if (gfc_match (" kind = ") == MATCH_YES) | |
1462 | m = MATCH_ERROR; | |
1463 | ||
1464 | n = gfc_match_init_expr (&e); | |
1465 | if (n == MATCH_NO) | |
1466 | gfc_error ("Expected initialization expression at %C"); | |
1467 | if (n != MATCH_YES) | |
1468 | return MATCH_ERROR; | |
1469 | ||
1470 | if (e->rank != 0) | |
1471 | { | |
1472 | gfc_error ("Expected scalar initialization expression at %C"); | |
1473 | m = MATCH_ERROR; | |
1474 | goto no_match; | |
1475 | } | |
1476 | ||
1477 | msg = gfc_extract_int (e, &ts->kind); | |
1478 | if (msg != NULL) | |
1479 | { | |
1480 | gfc_error (msg); | |
1481 | m = MATCH_ERROR; | |
1482 | goto no_match; | |
1483 | } | |
1484 | ||
1485 | gfc_free_expr (e); | |
1486 | e = NULL; | |
1487 | ||
e7a2d5fb | 1488 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a DN |
1489 | { |
1490 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
1491 | gfc_basic_typename (ts->type)); | |
1492 | ||
1493 | m = MATCH_ERROR; | |
1494 | goto no_match; | |
1495 | } | |
1496 | ||
1497 | if (gfc_match_char (')') != MATCH_YES) | |
1498 | { | |
8998be20 | 1499 | gfc_error ("Missing right parenthesis at %C"); |
6de9cd9a DN |
1500 | goto no_match; |
1501 | } | |
1502 | ||
1503 | return MATCH_YES; | |
1504 | ||
1505 | no_match: | |
1506 | gfc_free_expr (e); | |
63645982 | 1507 | gfc_current_locus = where; |
6de9cd9a DN |
1508 | return m; |
1509 | } | |
1510 | ||
1511 | ||
1512 | /* Match the various kind/length specifications in a CHARACTER | |
1513 | declaration. We don't return MATCH_NO. */ | |
1514 | ||
1515 | static match | |
636dff67 | 1516 | match_char_spec (gfc_typespec *ts) |
6de9cd9a DN |
1517 | { |
1518 | int i, kind, seen_length; | |
1519 | gfc_charlen *cl; | |
1520 | gfc_expr *len; | |
1521 | match m; | |
1522 | ||
9d64df18 | 1523 | kind = gfc_default_character_kind; |
6de9cd9a DN |
1524 | len = NULL; |
1525 | seen_length = 0; | |
1526 | ||
1527 | /* Try the old-style specification first. */ | |
1528 | old_char_selector = 0; | |
1529 | ||
1530 | m = match_char_length (&len); | |
1531 | if (m != MATCH_NO) | |
1532 | { | |
1533 | if (m == MATCH_YES) | |
1534 | old_char_selector = 1; | |
1535 | seen_length = 1; | |
1536 | goto done; | |
1537 | } | |
1538 | ||
1539 | m = gfc_match_char ('('); | |
1540 | if (m != MATCH_YES) | |
1541 | { | |
1542 | m = MATCH_YES; /* character without length is a single char */ | |
1543 | goto done; | |
1544 | } | |
1545 | ||
1546 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ) */ | |
1547 | if (gfc_match (" kind =") == MATCH_YES) | |
1548 | { | |
1549 | m = gfc_match_small_int (&kind); | |
1550 | if (m == MATCH_ERROR) | |
1551 | goto done; | |
1552 | if (m == MATCH_NO) | |
1553 | goto syntax; | |
1554 | ||
1555 | if (gfc_match (" , len =") == MATCH_NO) | |
1556 | goto rparen; | |
1557 | ||
1558 | m = char_len_param_value (&len); | |
1559 | if (m == MATCH_NO) | |
1560 | goto syntax; | |
1561 | if (m == MATCH_ERROR) | |
1562 | goto done; | |
1563 | seen_length = 1; | |
1564 | ||
1565 | goto rparen; | |
1566 | } | |
1567 | ||
636dff67 | 1568 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>" */ |
6de9cd9a DN |
1569 | if (gfc_match (" len =") == MATCH_YES) |
1570 | { | |
1571 | m = char_len_param_value (&len); | |
1572 | if (m == MATCH_NO) | |
1573 | goto syntax; | |
1574 | if (m == MATCH_ERROR) | |
1575 | goto done; | |
1576 | seen_length = 1; | |
1577 | ||
1578 | if (gfc_match_char (')') == MATCH_YES) | |
1579 | goto done; | |
1580 | ||
1581 | if (gfc_match (" , kind =") != MATCH_YES) | |
1582 | goto syntax; | |
1583 | ||
1584 | gfc_match_small_int (&kind); | |
1585 | ||
e7a2d5fb | 1586 | if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
6de9cd9a DN |
1587 | { |
1588 | gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); | |
1589 | return MATCH_YES; | |
1590 | } | |
1591 | ||
1592 | goto rparen; | |
1593 | } | |
1594 | ||
1595 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ) */ | |
1596 | m = char_len_param_value (&len); | |
1597 | if (m == MATCH_NO) | |
1598 | goto syntax; | |
1599 | if (m == MATCH_ERROR) | |
1600 | goto done; | |
1601 | seen_length = 1; | |
1602 | ||
1603 | m = gfc_match_char (')'); | |
1604 | if (m == MATCH_YES) | |
1605 | goto done; | |
1606 | ||
1607 | if (gfc_match_char (',') != MATCH_YES) | |
1608 | goto syntax; | |
1609 | ||
1610 | gfc_match (" kind ="); /* Gobble optional text */ | |
1611 | ||
1612 | m = gfc_match_small_int (&kind); | |
1613 | if (m == MATCH_ERROR) | |
1614 | goto done; | |
1615 | if (m == MATCH_NO) | |
1616 | goto syntax; | |
1617 | ||
1618 | rparen: | |
1619 | /* Require a right-paren at this point. */ | |
1620 | m = gfc_match_char (')'); | |
1621 | if (m == MATCH_YES) | |
1622 | goto done; | |
1623 | ||
1624 | syntax: | |
1625 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
1626 | m = MATCH_ERROR; | |
1627 | ||
1628 | done: | |
e7a2d5fb | 1629 | if (m == MATCH_YES && gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
6de9cd9a DN |
1630 | { |
1631 | gfc_error ("Kind %d is not a CHARACTER kind at %C", kind); | |
1632 | m = MATCH_ERROR; | |
1633 | } | |
1634 | ||
1635 | if (m != MATCH_YES) | |
1636 | { | |
1637 | gfc_free_expr (len); | |
1638 | return m; | |
1639 | } | |
1640 | ||
1641 | /* Do some final massaging of the length values. */ | |
1642 | cl = gfc_get_charlen (); | |
1643 | cl->next = gfc_current_ns->cl_list; | |
1644 | gfc_current_ns->cl_list = cl; | |
1645 | ||
1646 | if (seen_length == 0) | |
1647 | cl->length = gfc_int_expr (1); | |
1648 | else | |
1649 | { | |
1650 | if (len == NULL || gfc_extract_int (len, &i) != NULL || i >= 0) | |
1651 | cl->length = len; | |
1652 | else | |
1653 | { | |
1654 | gfc_free_expr (len); | |
1655 | cl->length = gfc_int_expr (0); | |
1656 | } | |
1657 | } | |
1658 | ||
1659 | ts->cl = cl; | |
1660 | ts->kind = kind; | |
1661 | ||
1662 | return MATCH_YES; | |
1663 | } | |
1664 | ||
1665 | ||
1666 | /* Matches a type specification. If successful, sets the ts structure | |
1667 | to the matched specification. This is necessary for FUNCTION and | |
1668 | IMPLICIT statements. | |
1669 | ||
e5ddaa24 TS |
1670 | If implicit_flag is nonzero, then we don't check for the optional |
1671 | kind specification. Not doing so is needed for matching an IMPLICIT | |
6de9cd9a DN |
1672 | statement correctly. */ |
1673 | ||
e5ddaa24 | 1674 | static match |
636dff67 | 1675 | match_type_spec (gfc_typespec *ts, int implicit_flag) |
6de9cd9a DN |
1676 | { |
1677 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1678 | gfc_symbol *sym; | |
1679 | match m; | |
0ff0dfbf | 1680 | int c; |
6de9cd9a DN |
1681 | |
1682 | gfc_clear_ts (ts); | |
1683 | ||
5f700e6d AL |
1684 | if (gfc_match (" byte") == MATCH_YES) |
1685 | { | |
1686 | if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C") | |
1687 | == FAILURE) | |
1688 | return MATCH_ERROR; | |
1689 | ||
1690 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
1691 | { | |
1692 | gfc_error ("BYTE type used at %C " | |
1693 | "is not available on the target machine"); | |
1694 | return MATCH_ERROR; | |
1695 | } | |
1696 | ||
1697 | ts->type = BT_INTEGER; | |
1698 | ts->kind = 1; | |
1699 | return MATCH_YES; | |
1700 | } | |
1701 | ||
6de9cd9a DN |
1702 | if (gfc_match (" integer") == MATCH_YES) |
1703 | { | |
1704 | ts->type = BT_INTEGER; | |
9d64df18 | 1705 | ts->kind = gfc_default_integer_kind; |
6de9cd9a DN |
1706 | goto get_kind; |
1707 | } | |
1708 | ||
1709 | if (gfc_match (" character") == MATCH_YES) | |
1710 | { | |
1711 | ts->type = BT_CHARACTER; | |
e5ddaa24 TS |
1712 | if (implicit_flag == 0) |
1713 | return match_char_spec (ts); | |
1714 | else | |
1715 | return MATCH_YES; | |
6de9cd9a DN |
1716 | } |
1717 | ||
1718 | if (gfc_match (" real") == MATCH_YES) | |
1719 | { | |
1720 | ts->type = BT_REAL; | |
9d64df18 | 1721 | ts->kind = gfc_default_real_kind; |
6de9cd9a DN |
1722 | goto get_kind; |
1723 | } | |
1724 | ||
1725 | if (gfc_match (" double precision") == MATCH_YES) | |
1726 | { | |
1727 | ts->type = BT_REAL; | |
9d64df18 | 1728 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
1729 | return MATCH_YES; |
1730 | } | |
1731 | ||
1732 | if (gfc_match (" complex") == MATCH_YES) | |
1733 | { | |
1734 | ts->type = BT_COMPLEX; | |
9d64df18 | 1735 | ts->kind = gfc_default_complex_kind; |
6de9cd9a DN |
1736 | goto get_kind; |
1737 | } | |
1738 | ||
1739 | if (gfc_match (" double complex") == MATCH_YES) | |
1740 | { | |
df8652dc SK |
1741 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
1742 | "conform to the Fortran 95 standard") == FAILURE) | |
1743 | return MATCH_ERROR; | |
1744 | ||
6de9cd9a | 1745 | ts->type = BT_COMPLEX; |
9d64df18 | 1746 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
1747 | return MATCH_YES; |
1748 | } | |
1749 | ||
1750 | if (gfc_match (" logical") == MATCH_YES) | |
1751 | { | |
1752 | ts->type = BT_LOGICAL; | |
9d64df18 | 1753 | ts->kind = gfc_default_logical_kind; |
6de9cd9a DN |
1754 | goto get_kind; |
1755 | } | |
1756 | ||
1757 | m = gfc_match (" type ( %n )", name); | |
1758 | if (m != MATCH_YES) | |
1759 | return m; | |
1760 | ||
1761 | /* Search for the name but allow the components to be defined later. */ | |
1762 | if (gfc_get_ha_symbol (name, &sym)) | |
1763 | { | |
1764 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
1765 | return MATCH_ERROR; | |
1766 | } | |
1767 | ||
1768 | if (sym->attr.flavor != FL_DERIVED | |
231b2fcc | 1769 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
1770 | return MATCH_ERROR; |
1771 | ||
1772 | ts->type = BT_DERIVED; | |
1773 | ts->kind = 0; | |
1774 | ts->derived = sym; | |
1775 | ||
1776 | return MATCH_YES; | |
1777 | ||
1778 | get_kind: | |
1779 | /* For all types except double, derived and character, look for an | |
1780 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
e5ddaa24 | 1781 | if (implicit_flag == 1) |
6de9cd9a DN |
1782 | return MATCH_YES; |
1783 | ||
0ff0dfbf TS |
1784 | if (gfc_current_form == FORM_FREE) |
1785 | { | |
1786 | c = gfc_peek_char(); | |
1787 | if (!gfc_is_whitespace(c) && c != '*' && c != '(' | |
636dff67 | 1788 | && c != ':' && c != ',') |
0ff0dfbf TS |
1789 | return MATCH_NO; |
1790 | } | |
1791 | ||
6de9cd9a DN |
1792 | m = gfc_match_kind_spec (ts); |
1793 | if (m == MATCH_NO && ts->type != BT_CHARACTER) | |
1794 | m = gfc_match_old_kind_spec (ts); | |
1795 | ||
1796 | if (m == MATCH_NO) | |
1797 | m = MATCH_YES; /* No kind specifier found. */ | |
1798 | ||
1799 | return m; | |
1800 | } | |
1801 | ||
1802 | ||
e5ddaa24 TS |
1803 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
1804 | already matched in parse.c, or we would not end up here in the | |
1805 | first place. So the only thing we need to check, is if there is | |
1806 | trailing garbage. If not, the match is successful. */ | |
1807 | ||
1808 | match | |
1809 | gfc_match_implicit_none (void) | |
1810 | { | |
e5ddaa24 TS |
1811 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
1812 | } | |
1813 | ||
1814 | ||
1815 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
1816 | ||
1817 | static match | |
1107b970 | 1818 | match_implicit_range (void) |
e5ddaa24 TS |
1819 | { |
1820 | int c, c1, c2, inner; | |
1821 | locus cur_loc; | |
1822 | ||
1823 | cur_loc = gfc_current_locus; | |
1824 | ||
1825 | gfc_gobble_whitespace (); | |
1826 | c = gfc_next_char (); | |
1827 | if (c != '(') | |
1828 | { | |
1829 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
1830 | goto bad; | |
1831 | } | |
1832 | ||
1833 | inner = 1; | |
1834 | while (inner) | |
1835 | { | |
1836 | gfc_gobble_whitespace (); | |
1837 | c1 = gfc_next_char (); | |
1838 | if (!ISALPHA (c1)) | |
1839 | goto bad; | |
1840 | ||
1841 | gfc_gobble_whitespace (); | |
1842 | c = gfc_next_char (); | |
1843 | ||
1844 | switch (c) | |
1845 | { | |
1846 | case ')': | |
1847 | inner = 0; /* Fall through */ | |
1848 | ||
1849 | case ',': | |
1850 | c2 = c1; | |
1851 | break; | |
1852 | ||
1853 | case '-': | |
1854 | gfc_gobble_whitespace (); | |
1855 | c2 = gfc_next_char (); | |
1856 | if (!ISALPHA (c2)) | |
1857 | goto bad; | |
1858 | ||
1859 | gfc_gobble_whitespace (); | |
1860 | c = gfc_next_char (); | |
1861 | ||
1862 | if ((c != ',') && (c != ')')) | |
1863 | goto bad; | |
1864 | if (c == ')') | |
1865 | inner = 0; | |
1866 | ||
1867 | break; | |
1868 | ||
1869 | default: | |
1870 | goto bad; | |
1871 | } | |
1872 | ||
1873 | if (c1 > c2) | |
1874 | { | |
1875 | gfc_error ("Letters must be in alphabetic order in " | |
1876 | "IMPLICIT statement at %C"); | |
1877 | goto bad; | |
1878 | } | |
1879 | ||
1880 | /* See if we can add the newly matched range to the pending | |
636dff67 SK |
1881 | implicits from this IMPLICIT statement. We do not check for |
1882 | conflicts with whatever earlier IMPLICIT statements may have | |
1883 | set. This is done when we've successfully finished matching | |
1884 | the current one. */ | |
1107b970 | 1885 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
e5ddaa24 TS |
1886 | goto bad; |
1887 | } | |
1888 | ||
1889 | return MATCH_YES; | |
1890 | ||
1891 | bad: | |
1892 | gfc_syntax_error (ST_IMPLICIT); | |
1893 | ||
1894 | gfc_current_locus = cur_loc; | |
1895 | return MATCH_ERROR; | |
1896 | } | |
1897 | ||
1898 | ||
1899 | /* Match an IMPLICIT statement, storing the types for | |
1900 | gfc_set_implicit() if the statement is accepted by the parser. | |
1901 | There is a strange looking, but legal syntactic construction | |
1902 | possible. It looks like: | |
1903 | ||
1904 | IMPLICIT INTEGER (a-b) (c-d) | |
1905 | ||
1906 | This is legal if "a-b" is a constant expression that happens to | |
1907 | equal one of the legal kinds for integers. The real problem | |
1908 | happens with an implicit specification that looks like: | |
1909 | ||
1910 | IMPLICIT INTEGER (a-b) | |
1911 | ||
1912 | In this case, a typespec matcher that is "greedy" (as most of the | |
1913 | matchers are) gobbles the character range as a kindspec, leaving | |
1914 | nothing left. We therefore have to go a bit more slowly in the | |
1915 | matching process by inhibiting the kindspec checking during | |
1916 | typespec matching and checking for a kind later. */ | |
1917 | ||
1918 | match | |
1919 | gfc_match_implicit (void) | |
1920 | { | |
1921 | gfc_typespec ts; | |
1922 | locus cur_loc; | |
1923 | int c; | |
1924 | match m; | |
1925 | ||
1926 | /* We don't allow empty implicit statements. */ | |
1927 | if (gfc_match_eos () == MATCH_YES) | |
1928 | { | |
1929 | gfc_error ("Empty IMPLICIT statement at %C"); | |
1930 | return MATCH_ERROR; | |
1931 | } | |
1932 | ||
e5ddaa24 TS |
1933 | do |
1934 | { | |
1107b970 PB |
1935 | /* First cleanup. */ |
1936 | gfc_clear_new_implicit (); | |
1937 | ||
e5ddaa24 TS |
1938 | /* A basic type is mandatory here. */ |
1939 | m = match_type_spec (&ts, 1); | |
1940 | if (m == MATCH_ERROR) | |
1941 | goto error; | |
1942 | if (m == MATCH_NO) | |
1943 | goto syntax; | |
1944 | ||
1945 | cur_loc = gfc_current_locus; | |
1107b970 | 1946 | m = match_implicit_range (); |
e5ddaa24 TS |
1947 | |
1948 | if (m == MATCH_YES) | |
1949 | { | |
1107b970 | 1950 | /* We may have <TYPE> (<RANGE>). */ |
e5ddaa24 TS |
1951 | gfc_gobble_whitespace (); |
1952 | c = gfc_next_char (); | |
1953 | if ((c == '\n') || (c == ',')) | |
1107b970 PB |
1954 | { |
1955 | /* Check for CHARACTER with no length parameter. */ | |
1956 | if (ts.type == BT_CHARACTER && !ts.cl) | |
1957 | { | |
9d64df18 | 1958 | ts.kind = gfc_default_character_kind; |
1107b970 PB |
1959 | ts.cl = gfc_get_charlen (); |
1960 | ts.cl->next = gfc_current_ns->cl_list; | |
1961 | gfc_current_ns->cl_list = ts.cl; | |
1962 | ts.cl->length = gfc_int_expr (1); | |
1963 | } | |
1964 | ||
1965 | /* Record the Successful match. */ | |
1966 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
1967 | return MATCH_ERROR; | |
1968 | continue; | |
1969 | } | |
e5ddaa24 TS |
1970 | |
1971 | gfc_current_locus = cur_loc; | |
1972 | } | |
1973 | ||
1107b970 PB |
1974 | /* Discard the (incorrectly) matched range. */ |
1975 | gfc_clear_new_implicit (); | |
1976 | ||
1977 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
1978 | if (ts.type == BT_CHARACTER) | |
1979 | m = match_char_spec (&ts); | |
1980 | else | |
e5ddaa24 | 1981 | { |
1107b970 | 1982 | m = gfc_match_kind_spec (&ts); |
e5ddaa24 | 1983 | if (m == MATCH_NO) |
1107b970 PB |
1984 | { |
1985 | m = gfc_match_old_kind_spec (&ts); | |
1986 | if (m == MATCH_ERROR) | |
1987 | goto error; | |
1988 | if (m == MATCH_NO) | |
1989 | goto syntax; | |
1990 | } | |
e5ddaa24 | 1991 | } |
1107b970 PB |
1992 | if (m == MATCH_ERROR) |
1993 | goto error; | |
e5ddaa24 | 1994 | |
1107b970 | 1995 | m = match_implicit_range (); |
e5ddaa24 TS |
1996 | if (m == MATCH_ERROR) |
1997 | goto error; | |
1998 | if (m == MATCH_NO) | |
1999 | goto syntax; | |
2000 | ||
2001 | gfc_gobble_whitespace (); | |
2002 | c = gfc_next_char (); | |
2003 | if ((c != '\n') && (c != ',')) | |
2004 | goto syntax; | |
2005 | ||
1107b970 PB |
2006 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2007 | return MATCH_ERROR; | |
e5ddaa24 TS |
2008 | } |
2009 | while (c == ','); | |
2010 | ||
1107b970 | 2011 | return MATCH_YES; |
e5ddaa24 TS |
2012 | |
2013 | syntax: | |
2014 | gfc_syntax_error (ST_IMPLICIT); | |
2015 | ||
2016 | error: | |
2017 | return MATCH_ERROR; | |
2018 | } | |
2019 | ||
8998be20 TB |
2020 | match |
2021 | gfc_match_import (void) | |
2022 | { | |
2023 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2024 | match m; | |
2025 | gfc_symbol *sym; | |
2026 | gfc_symtree *st; | |
2027 | ||
2028 | if (gfc_current_ns->proc_name == NULL || | |
2029 | gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
2030 | { | |
2031 | gfc_error ("IMPORT statement at %C only permitted in " | |
2032 | "an INTERFACE body"); | |
2033 | return MATCH_ERROR; | |
2034 | } | |
2035 | ||
636dff67 | 2036 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
8998be20 TB |
2037 | == FAILURE) |
2038 | return MATCH_ERROR; | |
2039 | ||
2040 | if (gfc_match_eos () == MATCH_YES) | |
2041 | { | |
2042 | /* All host variables should be imported. */ | |
2043 | gfc_current_ns->has_import_set = 1; | |
2044 | return MATCH_YES; | |
2045 | } | |
2046 | ||
2047 | if (gfc_match (" ::") == MATCH_YES) | |
2048 | { | |
2049 | if (gfc_match_eos () == MATCH_YES) | |
636dff67 SK |
2050 | { |
2051 | gfc_error ("Expecting list of named entities at %C"); | |
2052 | return MATCH_ERROR; | |
2053 | } | |
8998be20 TB |
2054 | } |
2055 | ||
2056 | for(;;) | |
2057 | { | |
2058 | m = gfc_match (" %n", name); | |
2059 | switch (m) | |
2060 | { | |
2061 | case MATCH_YES: | |
36d3fb4c PT |
2062 | if (gfc_current_ns->parent != NULL |
2063 | && gfc_find_symbol (name, gfc_current_ns->parent, | |
2064 | 1, &sym)) | |
2065 | { | |
2066 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2067 | return MATCH_ERROR; | |
2068 | } | |
2069 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
2070 | && gfc_find_symbol (name, | |
2071 | gfc_current_ns->proc_name->ns->parent, | |
2072 | 1, &sym)) | |
636dff67 SK |
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 | 2192 | |
6de9cd9a | 2193 | seen[d]++; |
63645982 | 2194 | seen_at[d] = gfc_current_locus; |
6de9cd9a DN |
2195 | |
2196 | if (d == DECL_DIMENSION) | |
2197 | { | |
2198 | m = gfc_match_array_spec (¤t_as); | |
2199 | ||
2200 | if (m == MATCH_NO) | |
2201 | { | |
2202 | gfc_error ("Missing dimension specification at %C"); | |
2203 | m = MATCH_ERROR; | |
2204 | } | |
2205 | ||
2206 | if (m == MATCH_ERROR) | |
2207 | goto cleanup; | |
2208 | } | |
2209 | } | |
2210 | ||
2211 | /* No double colon, so assume that we've been looking at something | |
2212 | else the whole time. */ | |
2213 | if (d == DECL_NONE) | |
2214 | { | |
2215 | m = MATCH_NO; | |
2216 | goto cleanup; | |
2217 | } | |
2218 | ||
2219 | /* Since we've seen a double colon, we have to be looking at an | |
2220 | attr-spec. This means that we can now issue errors. */ | |
2221 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2222 | if (seen[d] > 1) | |
2223 | { | |
2224 | switch (d) | |
2225 | { | |
2226 | case DECL_ALLOCATABLE: | |
2227 | attr = "ALLOCATABLE"; | |
2228 | break; | |
2229 | case DECL_DIMENSION: | |
2230 | attr = "DIMENSION"; | |
2231 | break; | |
2232 | case DECL_EXTERNAL: | |
2233 | attr = "EXTERNAL"; | |
2234 | break; | |
2235 | case DECL_IN: | |
2236 | attr = "INTENT (IN)"; | |
2237 | break; | |
2238 | case DECL_OUT: | |
2239 | attr = "INTENT (OUT)"; | |
2240 | break; | |
2241 | case DECL_INOUT: | |
2242 | attr = "INTENT (IN OUT)"; | |
2243 | break; | |
2244 | case DECL_INTRINSIC: | |
2245 | attr = "INTRINSIC"; | |
2246 | break; | |
2247 | case DECL_OPTIONAL: | |
2248 | attr = "OPTIONAL"; | |
2249 | break; | |
2250 | case DECL_PARAMETER: | |
2251 | attr = "PARAMETER"; | |
2252 | break; | |
2253 | case DECL_POINTER: | |
2254 | attr = "POINTER"; | |
2255 | break; | |
ee7e677f TB |
2256 | case DECL_PROTECTED: |
2257 | attr = "PROTECTED"; | |
2258 | break; | |
6de9cd9a DN |
2259 | case DECL_PRIVATE: |
2260 | attr = "PRIVATE"; | |
2261 | break; | |
2262 | case DECL_PUBLIC: | |
2263 | attr = "PUBLIC"; | |
2264 | break; | |
2265 | case DECL_SAVE: | |
2266 | attr = "SAVE"; | |
2267 | break; | |
2268 | case DECL_TARGET: | |
2269 | attr = "TARGET"; | |
2270 | break; | |
06469efd PT |
2271 | case DECL_VALUE: |
2272 | attr = "VALUE"; | |
2273 | break; | |
775e6c3a TB |
2274 | case DECL_VOLATILE: |
2275 | attr = "VOLATILE"; | |
2276 | break; | |
6de9cd9a DN |
2277 | default: |
2278 | attr = NULL; /* This shouldn't happen */ | |
2279 | } | |
2280 | ||
2281 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
2282 | m = MATCH_ERROR; | |
2283 | goto cleanup; | |
2284 | } | |
2285 | ||
2286 | /* Now that we've dealt with duplicate attributes, add the attributes | |
2287 | to the current attribute. */ | |
2288 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2289 | { | |
2290 | if (seen[d] == 0) | |
2291 | continue; | |
2292 | ||
2293 | if (gfc_current_state () == COMP_DERIVED | |
2294 | && d != DECL_DIMENSION && d != DECL_POINTER | |
2295 | && d != DECL_COLON && d != DECL_NONE) | |
2296 | { | |
5046aff5 PT |
2297 | if (d == DECL_ALLOCATABLE) |
2298 | { | |
636dff67 SK |
2299 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
2300 | "attribute at %C in a TYPE definition") | |
2301 | == FAILURE) | |
5046aff5 PT |
2302 | { |
2303 | m = MATCH_ERROR; | |
2304 | goto cleanup; | |
2305 | } | |
636dff67 SK |
2306 | } |
2307 | else | |
5046aff5 PT |
2308 | { |
2309 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
2310 | &seen_at[d]); | |
2311 | m = MATCH_ERROR; | |
2312 | goto cleanup; | |
2313 | } | |
6de9cd9a DN |
2314 | } |
2315 | ||
4213f93b | 2316 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
636dff67 | 2317 | && gfc_current_state () != COMP_MODULE) |
4213f93b PT |
2318 | { |
2319 | if (d == DECL_PRIVATE) | |
2320 | attr = "PRIVATE"; | |
2321 | else | |
2322 | attr = "PUBLIC"; | |
2323 | ||
2324 | gfc_error ("%s attribute at %L is not allowed outside of a MODULE", | |
2325 | attr, &seen_at[d]); | |
2326 | m = MATCH_ERROR; | |
2327 | goto cleanup; | |
2328 | } | |
2329 | ||
6de9cd9a DN |
2330 | switch (d) |
2331 | { | |
2332 | case DECL_ALLOCATABLE: | |
2333 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
2334 | break; | |
2335 | ||
2336 | case DECL_DIMENSION: | |
231b2fcc | 2337 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
2338 | break; |
2339 | ||
2340 | case DECL_EXTERNAL: | |
2341 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
2342 | break; | |
2343 | ||
2344 | case DECL_IN: | |
2345 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
2346 | break; | |
2347 | ||
2348 | case DECL_OUT: | |
2349 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
2350 | break; | |
2351 | ||
2352 | case DECL_INOUT: | |
2353 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
2354 | break; | |
2355 | ||
2356 | case DECL_INTRINSIC: | |
2357 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
2358 | break; | |
2359 | ||
2360 | case DECL_OPTIONAL: | |
2361 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
2362 | break; | |
2363 | ||
2364 | case DECL_PARAMETER: | |
231b2fcc | 2365 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
6de9cd9a DN |
2366 | break; |
2367 | ||
2368 | case DECL_POINTER: | |
2369 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
2370 | break; | |
2371 | ||
ee7e677f TB |
2372 | case DECL_PROTECTED: |
2373 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
2374 | { | |
2375 | gfc_error ("PROTECTED at %C only allowed in specification " | |
2376 | "part of a module"); | |
2377 | t = FAILURE; | |
2378 | break; | |
2379 | } | |
2380 | ||
636dff67 SK |
2381 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
2382 | "attribute at %C") | |
ee7e677f TB |
2383 | == FAILURE) |
2384 | t = FAILURE; | |
2385 | else | |
2386 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
2387 | break; | |
2388 | ||
6de9cd9a | 2389 | case DECL_PRIVATE: |
231b2fcc TS |
2390 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
2391 | &seen_at[d]); | |
6de9cd9a DN |
2392 | break; |
2393 | ||
2394 | case DECL_PUBLIC: | |
231b2fcc TS |
2395 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
2396 | &seen_at[d]); | |
6de9cd9a DN |
2397 | break; |
2398 | ||
2399 | case DECL_SAVE: | |
231b2fcc | 2400 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
2401 | break; |
2402 | ||
2403 | case DECL_TARGET: | |
2404 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
2405 | break; | |
2406 | ||
06469efd | 2407 | case DECL_VALUE: |
636dff67 SK |
2408 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
2409 | "at %C") | |
06469efd PT |
2410 | == FAILURE) |
2411 | t = FAILURE; | |
2412 | else | |
2413 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
2414 | break; | |
2415 | ||
775e6c3a TB |
2416 | case DECL_VOLATILE: |
2417 | if (gfc_notify_std (GFC_STD_F2003, | |
636dff67 | 2418 | "Fortran 2003: VOLATILE attribute at %C") |
775e6c3a TB |
2419 | == FAILURE) |
2420 | t = FAILURE; | |
2421 | else | |
2422 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
2423 | break; | |
2424 | ||
6de9cd9a DN |
2425 | default: |
2426 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
2427 | } | |
2428 | ||
2429 | if (t == FAILURE) | |
2430 | { | |
2431 | m = MATCH_ERROR; | |
2432 | goto cleanup; | |
2433 | } | |
2434 | } | |
2435 | ||
2436 | colon_seen = 1; | |
2437 | return MATCH_YES; | |
2438 | ||
2439 | cleanup: | |
63645982 | 2440 | gfc_current_locus = start; |
6de9cd9a DN |
2441 | gfc_free_array_spec (current_as); |
2442 | current_as = NULL; | |
2443 | return m; | |
2444 | } | |
2445 | ||
2446 | ||
2447 | /* Match a data declaration statement. */ | |
2448 | ||
2449 | match | |
2450 | gfc_match_data_decl (void) | |
2451 | { | |
2452 | gfc_symbol *sym; | |
2453 | match m; | |
949d5b72 | 2454 | int elem; |
6de9cd9a | 2455 | |
e5ddaa24 | 2456 | m = match_type_spec (¤t_ts, 0); |
6de9cd9a DN |
2457 | if (m != MATCH_YES) |
2458 | return m; | |
2459 | ||
2460 | if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) | |
2461 | { | |
2462 | sym = gfc_use_derived (current_ts.derived); | |
2463 | ||
2464 | if (sym == NULL) | |
2465 | { | |
2466 | m = MATCH_ERROR; | |
2467 | goto cleanup; | |
2468 | } | |
2469 | ||
2470 | current_ts.derived = sym; | |
2471 | } | |
2472 | ||
2473 | m = match_attr_spec (); | |
2474 | if (m == MATCH_ERROR) | |
2475 | { | |
2476 | m = MATCH_NO; | |
2477 | goto cleanup; | |
2478 | } | |
2479 | ||
2480 | if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL) | |
2481 | { | |
2482 | ||
2483 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
2484 | goto ok; | |
2485 | ||
976e21f6 | 2486 | gfc_find_symbol (current_ts.derived->name, |
636dff67 | 2487 | current_ts.derived->ns->parent, 1, &sym); |
6de9cd9a | 2488 | |
976e21f6 | 2489 | /* Any symbol that we find had better be a type definition |
636dff67 | 2490 | which has its components defined. */ |
976e21f6 | 2491 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
636dff67 | 2492 | && current_ts.derived->components != NULL) |
6de9cd9a DN |
2493 | goto ok; |
2494 | ||
976e21f6 PT |
2495 | /* Now we have an error, which we signal, and then fix up |
2496 | because the knock-on is plain and simple confusing. */ | |
2497 | gfc_error_now ("Derived type at %C has not been previously defined " | |
636dff67 | 2498 | "and so cannot appear in a derived type definition"); |
976e21f6 PT |
2499 | current_attr.pointer = 1; |
2500 | goto ok; | |
6de9cd9a DN |
2501 | } |
2502 | ||
2503 | ok: | |
2504 | /* If we have an old-style character declaration, and no new-style | |
2505 | attribute specifications, then there a comma is optional between | |
2506 | the type specification and the variable list. */ | |
2507 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
2508 | gfc_match_char (','); | |
2509 | ||
949d5b72 PT |
2510 | /* Give the types/attributes to symbols that follow. Give the element |
2511 | a number so that repeat character length expressions can be copied. */ | |
2512 | elem = 1; | |
6de9cd9a DN |
2513 | for (;;) |
2514 | { | |
949d5b72 | 2515 | m = variable_decl (elem++); |
6de9cd9a DN |
2516 | if (m == MATCH_ERROR) |
2517 | goto cleanup; | |
2518 | if (m == MATCH_NO) | |
2519 | break; | |
2520 | ||
2521 | if (gfc_match_eos () == MATCH_YES) | |
2522 | goto cleanup; | |
2523 | if (gfc_match_char (',') != MATCH_YES) | |
2524 | break; | |
2525 | } | |
2526 | ||
8f81c3c6 PT |
2527 | if (gfc_error_flag_test () == 0) |
2528 | gfc_error ("Syntax error in data declaration at %C"); | |
6de9cd9a DN |
2529 | m = MATCH_ERROR; |
2530 | ||
a9f6f1f2 JD |
2531 | gfc_free_data_all (gfc_current_ns); |
2532 | ||
6de9cd9a DN |
2533 | cleanup: |
2534 | gfc_free_array_spec (current_as); | |
2535 | current_as = NULL; | |
2536 | return m; | |
2537 | } | |
2538 | ||
2539 | ||
2540 | /* Match a prefix associated with a function or subroutine | |
2541 | declaration. If the typespec pointer is nonnull, then a typespec | |
2542 | can be matched. Note that if nothing matches, MATCH_YES is | |
2543 | returned (the null string was matched). */ | |
2544 | ||
2545 | static match | |
636dff67 | 2546 | match_prefix (gfc_typespec *ts) |
6de9cd9a DN |
2547 | { |
2548 | int seen_type; | |
2549 | ||
2550 | gfc_clear_attr (¤t_attr); | |
2551 | seen_type = 0; | |
2552 | ||
2553 | loop: | |
2554 | if (!seen_type && ts != NULL | |
e5ddaa24 | 2555 | && match_type_spec (ts, 0) == MATCH_YES |
6de9cd9a DN |
2556 | && gfc_match_space () == MATCH_YES) |
2557 | { | |
2558 | ||
2559 | seen_type = 1; | |
2560 | goto loop; | |
2561 | } | |
2562 | ||
2563 | if (gfc_match ("elemental% ") == MATCH_YES) | |
2564 | { | |
2565 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
2566 | return MATCH_ERROR; | |
2567 | ||
2568 | goto loop; | |
2569 | } | |
2570 | ||
2571 | if (gfc_match ("pure% ") == MATCH_YES) | |
2572 | { | |
2573 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
2574 | return MATCH_ERROR; | |
2575 | ||
2576 | goto loop; | |
2577 | } | |
2578 | ||
2579 | if (gfc_match ("recursive% ") == MATCH_YES) | |
2580 | { | |
2581 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
2582 | return MATCH_ERROR; | |
2583 | ||
2584 | goto loop; | |
2585 | } | |
2586 | ||
2587 | /* At this point, the next item is not a prefix. */ | |
2588 | return MATCH_YES; | |
2589 | } | |
2590 | ||
2591 | ||
2592 | /* Copy attributes matched by match_prefix() to attributes on a symbol. */ | |
2593 | ||
2594 | static try | |
636dff67 | 2595 | copy_prefix (symbol_attribute *dest, locus *where) |
6de9cd9a | 2596 | { |
6de9cd9a DN |
2597 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
2598 | return FAILURE; | |
2599 | ||
2600 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
2601 | return FAILURE; | |
2602 | ||
2603 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
2604 | return FAILURE; | |
2605 | ||
2606 | return SUCCESS; | |
2607 | } | |
2608 | ||
2609 | ||
2610 | /* Match a formal argument list. */ | |
2611 | ||
2612 | match | |
636dff67 | 2613 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
6de9cd9a DN |
2614 | { |
2615 | gfc_formal_arglist *head, *tail, *p, *q; | |
2616 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2617 | gfc_symbol *sym; | |
2618 | match m; | |
2619 | ||
2620 | head = tail = NULL; | |
2621 | ||
2622 | if (gfc_match_char ('(') != MATCH_YES) | |
2623 | { | |
2624 | if (null_flag) | |
2625 | goto ok; | |
2626 | return MATCH_NO; | |
2627 | } | |
2628 | ||
2629 | if (gfc_match_char (')') == MATCH_YES) | |
2630 | goto ok; | |
2631 | ||
2632 | for (;;) | |
2633 | { | |
2634 | if (gfc_match_char ('*') == MATCH_YES) | |
2635 | sym = NULL; | |
2636 | else | |
2637 | { | |
2638 | m = gfc_match_name (name); | |
2639 | if (m != MATCH_YES) | |
2640 | goto cleanup; | |
2641 | ||
2642 | if (gfc_get_symbol (name, NULL, &sym)) | |
2643 | goto cleanup; | |
2644 | } | |
2645 | ||
2646 | p = gfc_get_formal_arglist (); | |
2647 | ||
2648 | if (head == NULL) | |
2649 | head = tail = p; | |
2650 | else | |
2651 | { | |
2652 | tail->next = p; | |
2653 | tail = p; | |
2654 | } | |
2655 | ||
2656 | tail->sym = sym; | |
2657 | ||
2658 | /* We don't add the VARIABLE flavor because the name could be a | |
636dff67 SK |
2659 | dummy procedure. We don't apply these attributes to formal |
2660 | arguments of statement functions. */ | |
6de9cd9a | 2661 | if (sym != NULL && !st_flag |
231b2fcc | 2662 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
6de9cd9a DN |
2663 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
2664 | { | |
2665 | m = MATCH_ERROR; | |
2666 | goto cleanup; | |
2667 | } | |
2668 | ||
2669 | /* The name of a program unit can be in a different namespace, | |
636dff67 SK |
2670 | so check for it explicitly. After the statement is accepted, |
2671 | the name is checked for especially in gfc_get_symbol(). */ | |
6de9cd9a DN |
2672 | if (gfc_new_block != NULL && sym != NULL |
2673 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
2674 | { | |
2675 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
2676 | sym->name); | |
2677 | m = MATCH_ERROR; | |
2678 | goto cleanup; | |
2679 | } | |
2680 | ||
2681 | if (gfc_match_char (')') == MATCH_YES) | |
2682 | goto ok; | |
2683 | ||
2684 | m = gfc_match_char (','); | |
2685 | if (m != MATCH_YES) | |
2686 | { | |
2687 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
2688 | goto cleanup; | |
2689 | } | |
2690 | } | |
2691 | ||
2692 | ok: | |
2693 | /* Check for duplicate symbols in the formal argument list. */ | |
2694 | if (head != NULL) | |
2695 | { | |
2696 | for (p = head; p->next; p = p->next) | |
2697 | { | |
2698 | if (p->sym == NULL) | |
2699 | continue; | |
2700 | ||
2701 | for (q = p->next; q; q = q->next) | |
2702 | if (p->sym == q->sym) | |
2703 | { | |
636dff67 SK |
2704 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
2705 | "at %C", p->sym->name); | |
6de9cd9a DN |
2706 | |
2707 | m = MATCH_ERROR; | |
2708 | goto cleanup; | |
2709 | } | |
2710 | } | |
2711 | } | |
2712 | ||
2713 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) == | |
2714 | FAILURE) | |
2715 | { | |
2716 | m = MATCH_ERROR; | |
2717 | goto cleanup; | |
2718 | } | |
2719 | ||
2720 | return MATCH_YES; | |
2721 | ||
2722 | cleanup: | |
2723 | gfc_free_formal_arglist (head); | |
2724 | return m; | |
2725 | } | |
2726 | ||
2727 | ||
2728 | /* Match a RESULT specification following a function declaration or | |
2729 | ENTRY statement. Also matches the end-of-statement. */ | |
2730 | ||
2731 | static match | |
636dff67 | 2732 | match_result (gfc_symbol * function, gfc_symbol **result) |
6de9cd9a DN |
2733 | { |
2734 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2735 | gfc_symbol *r; | |
2736 | match m; | |
2737 | ||
2738 | if (gfc_match (" result (") != MATCH_YES) | |
2739 | return MATCH_NO; | |
2740 | ||
2741 | m = gfc_match_name (name); | |
2742 | if (m != MATCH_YES) | |
2743 | return m; | |
2744 | ||
2745 | if (gfc_match (" )%t") != MATCH_YES) | |
2746 | { | |
2747 | gfc_error ("Unexpected junk following RESULT variable at %C"); | |
2748 | return MATCH_ERROR; | |
2749 | } | |
2750 | ||
2751 | if (strcmp (function->name, name) == 0) | |
2752 | { | |
636dff67 | 2753 | gfc_error ("RESULT variable at %C must be different than function name"); |
6de9cd9a DN |
2754 | return MATCH_ERROR; |
2755 | } | |
2756 | ||
2757 | if (gfc_get_symbol (name, NULL, &r)) | |
2758 | return MATCH_ERROR; | |
2759 | ||
231b2fcc TS |
2760 | if (gfc_add_flavor (&r->attr, FL_VARIABLE, r->name, NULL) == FAILURE |
2761 | || gfc_add_result (&r->attr, r->name, NULL) == FAILURE) | |
6de9cd9a DN |
2762 | return MATCH_ERROR; |
2763 | ||
2764 | *result = r; | |
2765 | ||
2766 | return MATCH_YES; | |
2767 | } | |
2768 | ||
2769 | ||
2770 | /* Match a function declaration. */ | |
2771 | ||
2772 | match | |
2773 | gfc_match_function_decl (void) | |
2774 | { | |
2775 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2776 | gfc_symbol *sym, *result; | |
2777 | locus old_loc; | |
2778 | match m; | |
2779 | ||
2780 | if (gfc_current_state () != COMP_NONE | |
2781 | && gfc_current_state () != COMP_INTERFACE | |
2782 | && gfc_current_state () != COMP_CONTAINS) | |
2783 | return MATCH_NO; | |
2784 | ||
2785 | gfc_clear_ts (¤t_ts); | |
2786 | ||
63645982 | 2787 | old_loc = gfc_current_locus; |
6de9cd9a DN |
2788 | |
2789 | m = match_prefix (¤t_ts); | |
2790 | if (m != MATCH_YES) | |
2791 | { | |
63645982 | 2792 | gfc_current_locus = old_loc; |
6de9cd9a DN |
2793 | return m; |
2794 | } | |
2795 | ||
2796 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
2797 | { | |
63645982 | 2798 | gfc_current_locus = old_loc; |
6de9cd9a DN |
2799 | return MATCH_NO; |
2800 | } | |
2801 | ||
1a492601 | 2802 | if (get_proc_name (name, &sym, false)) |
6de9cd9a DN |
2803 | return MATCH_ERROR; |
2804 | gfc_new_block = sym; | |
2805 | ||
2806 | m = gfc_match_formal_arglist (sym, 0, 0); | |
2807 | if (m == MATCH_NO) | |
2b9a33ae TS |
2808 | { |
2809 | gfc_error ("Expected formal argument list in function " | |
636dff67 | 2810 | "definition at %C"); |
2b9a33ae TS |
2811 | m = MATCH_ERROR; |
2812 | goto cleanup; | |
2813 | } | |
6de9cd9a DN |
2814 | else if (m == MATCH_ERROR) |
2815 | goto cleanup; | |
2816 | ||
2817 | result = NULL; | |
2818 | ||
2819 | if (gfc_match_eos () != MATCH_YES) | |
2820 | { | |
2821 | /* See if a result variable is present. */ | |
2822 | m = match_result (sym, &result); | |
2823 | if (m == MATCH_NO) | |
2824 | gfc_error ("Unexpected junk after function declaration at %C"); | |
2825 | ||
2826 | if (m != MATCH_YES) | |
2827 | { | |
2828 | m = MATCH_ERROR; | |
2829 | goto cleanup; | |
2830 | } | |
2831 | } | |
2832 | ||
2833 | /* Make changes to the symbol. */ | |
2834 | m = MATCH_ERROR; | |
2835 | ||
231b2fcc | 2836 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
2837 | goto cleanup; |
2838 | ||
2839 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
2840 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
2841 | goto cleanup; | |
2842 | ||
636dff67 SK |
2843 | if (current_ts.type != BT_UNKNOWN && sym->ts.type != BT_UNKNOWN |
2844 | && !sym->attr.implicit_type) | |
6de9cd9a DN |
2845 | { |
2846 | gfc_error ("Function '%s' at %C already has a type of %s", name, | |
2847 | gfc_basic_typename (sym->ts.type)); | |
2848 | goto cleanup; | |
2849 | } | |
2850 | ||
2851 | if (result == NULL) | |
2852 | { | |
2853 | sym->ts = current_ts; | |
2854 | sym->result = sym; | |
2855 | } | |
2856 | else | |
2857 | { | |
2858 | result->ts = current_ts; | |
2859 | sym->result = result; | |
2860 | } | |
2861 | ||
2862 | return MATCH_YES; | |
2863 | ||
2864 | cleanup: | |
63645982 | 2865 | gfc_current_locus = old_loc; |
6de9cd9a DN |
2866 | return m; |
2867 | } | |
2868 | ||
636dff67 SK |
2869 | |
2870 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
2871 | pass the name of the entry, rather than the gfc_current_block name, and | |
2872 | to return false upon finding an existing global entry. */ | |
68ea355b PT |
2873 | |
2874 | static bool | |
636dff67 | 2875 | add_global_entry (const char *name, int sub) |
68ea355b PT |
2876 | { |
2877 | gfc_gsymbol *s; | |
2878 | ||
2879 | s = gfc_get_gsymbol(name); | |
2880 | ||
2881 | if (s->defined | |
636dff67 SK |
2882 | || (s->type != GSYM_UNKNOWN |
2883 | && s->type != (sub ? GSYM_SUBROUTINE : GSYM_FUNCTION))) | |
68ea355b PT |
2884 | global_used(s, NULL); |
2885 | else | |
2886 | { | |
2887 | s->type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; | |
2888 | s->where = gfc_current_locus; | |
2889 | s->defined = 1; | |
2890 | return true; | |
2891 | } | |
2892 | return false; | |
2893 | } | |
6de9cd9a | 2894 | |
636dff67 | 2895 | |
6de9cd9a DN |
2896 | /* Match an ENTRY statement. */ |
2897 | ||
2898 | match | |
2899 | gfc_match_entry (void) | |
2900 | { | |
3d79abbd PB |
2901 | gfc_symbol *proc; |
2902 | gfc_symbol *result; | |
2903 | gfc_symbol *entry; | |
6de9cd9a DN |
2904 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
2905 | gfc_compile_state state; | |
2906 | match m; | |
3d79abbd | 2907 | gfc_entry_list *el; |
c96cfa49 | 2908 | locus old_loc; |
1a492601 | 2909 | bool module_procedure; |
6de9cd9a DN |
2910 | |
2911 | m = gfc_match_name (name); | |
2912 | if (m != MATCH_YES) | |
2913 | return m; | |
2914 | ||
3d79abbd | 2915 | state = gfc_current_state (); |
4c93c95a | 2916 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
3d79abbd | 2917 | { |
4c93c95a FXC |
2918 | switch (state) |
2919 | { | |
2920 | case COMP_PROGRAM: | |
2921 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
2922 | break; | |
2923 | case COMP_MODULE: | |
2924 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
2925 | break; | |
2926 | case COMP_BLOCK_DATA: | |
636dff67 SK |
2927 | gfc_error ("ENTRY statement at %C cannot appear within " |
2928 | "a BLOCK DATA"); | |
4c93c95a FXC |
2929 | break; |
2930 | case COMP_INTERFACE: | |
636dff67 SK |
2931 | gfc_error ("ENTRY statement at %C cannot appear within " |
2932 | "an INTERFACE"); | |
4c93c95a FXC |
2933 | break; |
2934 | case COMP_DERIVED: | |
636dff67 SK |
2935 | gfc_error ("ENTRY statement at %C cannot appear within " |
2936 | "a DERIVED TYPE block"); | |
4c93c95a FXC |
2937 | break; |
2938 | case COMP_IF: | |
636dff67 SK |
2939 | gfc_error ("ENTRY statement at %C cannot appear within " |
2940 | "an IF-THEN block"); | |
4c93c95a FXC |
2941 | break; |
2942 | case COMP_DO: | |
636dff67 SK |
2943 | gfc_error ("ENTRY statement at %C cannot appear within " |
2944 | "a DO block"); | |
4c93c95a FXC |
2945 | break; |
2946 | case COMP_SELECT: | |
636dff67 SK |
2947 | gfc_error ("ENTRY statement at %C cannot appear within " |
2948 | "a SELECT block"); | |
4c93c95a FXC |
2949 | break; |
2950 | case COMP_FORALL: | |
636dff67 SK |
2951 | gfc_error ("ENTRY statement at %C cannot appear within " |
2952 | "a FORALL block"); | |
4c93c95a FXC |
2953 | break; |
2954 | case COMP_WHERE: | |
636dff67 SK |
2955 | gfc_error ("ENTRY statement at %C cannot appear within " |
2956 | "a WHERE block"); | |
4c93c95a FXC |
2957 | break; |
2958 | case COMP_CONTAINS: | |
636dff67 SK |
2959 | gfc_error ("ENTRY statement at %C cannot appear within " |
2960 | "a contained subprogram"); | |
4c93c95a FXC |
2961 | break; |
2962 | default: | |
2963 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
2964 | } | |
3d79abbd PB |
2965 | return MATCH_ERROR; |
2966 | } | |
2967 | ||
1a492601 | 2968 | module_procedure = gfc_current_ns->parent != NULL |
636dff67 SK |
2969 | && gfc_current_ns->parent->proc_name |
2970 | && gfc_current_ns->parent->proc_name->attr.flavor | |
2971 | == FL_MODULE; | |
1a492601 | 2972 | |
3d79abbd PB |
2973 | if (gfc_current_ns->parent != NULL |
2974 | && gfc_current_ns->parent->proc_name | |
1a492601 | 2975 | && !module_procedure) |
3d79abbd PB |
2976 | { |
2977 | gfc_error("ENTRY statement at %C cannot appear in a " | |
2978 | "contained procedure"); | |
2979 | return MATCH_ERROR; | |
2980 | } | |
2981 | ||
1a492601 PT |
2982 | /* Module function entries need special care in get_proc_name |
2983 | because previous references within the function will have | |
2984 | created symbols attached to the current namespace. */ | |
2985 | if (get_proc_name (name, &entry, | |
2986 | gfc_current_ns->parent != NULL | |
2987 | && module_procedure | |
2988 | && gfc_current_ns->proc_name->attr.function)) | |
6de9cd9a DN |
2989 | return MATCH_ERROR; |
2990 | ||
3d79abbd PB |
2991 | proc = gfc_current_block (); |
2992 | ||
2993 | if (state == COMP_SUBROUTINE) | |
6de9cd9a | 2994 | { |
231b2fcc | 2995 | /* An entry in a subroutine. */ |
68ea355b PT |
2996 | if (!add_global_entry (name, 1)) |
2997 | return MATCH_ERROR; | |
2998 | ||
6de9cd9a DN |
2999 | m = gfc_match_formal_arglist (entry, 0, 1); |
3000 | if (m != MATCH_YES) | |
3001 | return MATCH_ERROR; | |
3002 | ||
231b2fcc TS |
3003 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
3004 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a | 3005 | return MATCH_ERROR; |
3d79abbd PB |
3006 | } |
3007 | else | |
3008 | { | |
c96cfa49 | 3009 | /* An entry in a function. |
636dff67 SK |
3010 | We need to take special care because writing |
3011 | ENTRY f() | |
3012 | as | |
3013 | ENTRY f | |
3014 | is allowed, whereas | |
3015 | ENTRY f() RESULT (r) | |
3016 | can't be written as | |
3017 | ENTRY f RESULT (r). */ | |
68ea355b PT |
3018 | if (!add_global_entry (name, 0)) |
3019 | return MATCH_ERROR; | |
3020 | ||
c96cfa49 TS |
3021 | old_loc = gfc_current_locus; |
3022 | if (gfc_match_eos () == MATCH_YES) | |
3023 | { | |
3024 | gfc_current_locus = old_loc; | |
3025 | /* Match the empty argument list, and add the interface to | |
3026 | the symbol. */ | |
3027 | m = gfc_match_formal_arglist (entry, 0, 1); | |
3028 | } | |
3029 | else | |
3030 | m = gfc_match_formal_arglist (entry, 0, 0); | |
3031 | ||
6de9cd9a DN |
3032 | if (m != MATCH_YES) |
3033 | return MATCH_ERROR; | |
3034 | ||
6de9cd9a DN |
3035 | result = NULL; |
3036 | ||
3037 | if (gfc_match_eos () == MATCH_YES) | |
3038 | { | |
231b2fcc TS |
3039 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
3040 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a DN |
3041 | return MATCH_ERROR; |
3042 | ||
d198b59a | 3043 | entry->result = entry; |
6de9cd9a DN |
3044 | } |
3045 | else | |
3046 | { | |
3d79abbd | 3047 | m = match_result (proc, &result); |
6de9cd9a DN |
3048 | if (m == MATCH_NO) |
3049 | gfc_syntax_error (ST_ENTRY); | |
3050 | if (m != MATCH_YES) | |
3051 | return MATCH_ERROR; | |
3052 | ||
231b2fcc TS |
3053 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE |
3054 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
636dff67 SK |
3055 | || gfc_add_function (&entry->attr, result->name, NULL) |
3056 | == FAILURE) | |
6de9cd9a | 3057 | return MATCH_ERROR; |
d198b59a JJ |
3058 | |
3059 | entry->result = result; | |
6de9cd9a | 3060 | } |
6de9cd9a DN |
3061 | } |
3062 | ||
3063 | if (gfc_match_eos () != MATCH_YES) | |
3064 | { | |
3065 | gfc_syntax_error (ST_ENTRY); | |
3066 | return MATCH_ERROR; | |
3067 | } | |
3068 | ||
3d79abbd PB |
3069 | entry->attr.recursive = proc->attr.recursive; |
3070 | entry->attr.elemental = proc->attr.elemental; | |
3071 | entry->attr.pure = proc->attr.pure; | |
6de9cd9a | 3072 | |
3d79abbd PB |
3073 | el = gfc_get_entry_list (); |
3074 | el->sym = entry; | |
3075 | el->next = gfc_current_ns->entries; | |
3076 | gfc_current_ns->entries = el; | |
3077 | if (el->next) | |
3078 | el->id = el->next->id + 1; | |
3079 | else | |
3080 | el->id = 1; | |
6de9cd9a | 3081 | |
3d79abbd PB |
3082 | new_st.op = EXEC_ENTRY; |
3083 | new_st.ext.entry = el; | |
3084 | ||
3085 | return MATCH_YES; | |
6de9cd9a DN |
3086 | } |
3087 | ||
3088 | ||
3089 | /* Match a subroutine statement, including optional prefixes. */ | |
3090 | ||
3091 | match | |
3092 | gfc_match_subroutine (void) | |
3093 | { | |
3094 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3095 | gfc_symbol *sym; | |
3096 | match m; | |
3097 | ||
3098 | if (gfc_current_state () != COMP_NONE | |
3099 | && gfc_current_state () != COMP_INTERFACE | |
3100 | && gfc_current_state () != COMP_CONTAINS) | |
3101 | return MATCH_NO; | |
3102 | ||
3103 | m = match_prefix (NULL); | |
3104 | if (m != MATCH_YES) | |
3105 | return m; | |
3106 | ||
3107 | m = gfc_match ("subroutine% %n", name); | |
3108 | if (m != MATCH_YES) | |
3109 | return m; | |
3110 | ||
1a492601 | 3111 | if (get_proc_name (name, &sym, false)) |
6de9cd9a DN |
3112 | return MATCH_ERROR; |
3113 | gfc_new_block = sym; | |
3114 | ||
231b2fcc | 3115 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
3116 | return MATCH_ERROR; |
3117 | ||
3118 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
3119 | return MATCH_ERROR; | |
3120 | ||
3121 | if (gfc_match_eos () != MATCH_YES) | |
3122 | { | |
3123 | gfc_syntax_error (ST_SUBROUTINE); | |
3124 | return MATCH_ERROR; | |
3125 | } | |
3126 | ||
3127 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
3128 | return MATCH_ERROR; | |
3129 | ||
3130 | return MATCH_YES; | |
3131 | } | |
3132 | ||
3133 | ||
1f2959f0 | 3134 | /* Return nonzero if we're currently compiling a contained procedure. */ |
ddc9ce91 TS |
3135 | |
3136 | static int | |
3137 | contained_procedure (void) | |
3138 | { | |
3139 | gfc_state_data *s; | |
3140 | ||
3141 | for (s=gfc_state_stack; s; s=s->previous) | |
3142 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) | |
636dff67 | 3143 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) |
ddc9ce91 TS |
3144 | return 1; |
3145 | ||
3146 | return 0; | |
3147 | } | |
3148 | ||
25d8f0a2 TS |
3149 | /* Set the kind of each enumerator. The kind is selected such that it is |
3150 | interoperable with the corresponding C enumeration type, making | |
3151 | sure that -fshort-enums is honored. */ | |
3152 | ||
3153 | static void | |
3154 | set_enum_kind(void) | |
3155 | { | |
3156 | enumerator_history *current_history = NULL; | |
3157 | int kind; | |
3158 | int i; | |
3159 | ||
3160 | if (max_enum == NULL || enum_history == NULL) | |
3161 | return; | |
3162 | ||
3163 | if (!gfc_option.fshort_enums) | |
3164 | return; | |
3165 | ||
3166 | i = 0; | |
3167 | do | |
3168 | { | |
3169 | kind = gfc_integer_kinds[i++].kind; | |
3170 | } | |
3171 | while (kind < gfc_c_int_kind | |
3172 | && gfc_check_integer_range (max_enum->initializer->value.integer, | |
3173 | kind) != ARITH_OK); | |
3174 | ||
3175 | current_history = enum_history; | |
3176 | while (current_history != NULL) | |
3177 | { | |
3178 | current_history->sym->ts.kind = kind; | |
3179 | current_history = current_history->next; | |
3180 | } | |
3181 | } | |
3182 | ||
636dff67 | 3183 | |
6de9cd9a DN |
3184 | /* Match any of the various end-block statements. Returns the type of |
3185 | END to the caller. The END INTERFACE, END IF, END DO and END | |
3186 | SELECT statements cannot be replaced by a single END statement. */ | |
3187 | ||
3188 | match | |
636dff67 | 3189 | gfc_match_end (gfc_statement *st) |
6de9cd9a DN |
3190 | { |
3191 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3192 | gfc_compile_state state; | |
3193 | locus old_loc; | |
3194 | const char *block_name; | |
3195 | const char *target; | |
ddc9ce91 | 3196 | int eos_ok; |
6de9cd9a DN |
3197 | match m; |
3198 | ||
63645982 | 3199 | old_loc = gfc_current_locus; |
6de9cd9a DN |
3200 | if (gfc_match ("end") != MATCH_YES) |
3201 | return MATCH_NO; | |
3202 | ||
3203 | state = gfc_current_state (); | |
636dff67 SK |
3204 | block_name = gfc_current_block () == NULL |
3205 | ? NULL : gfc_current_block ()->name; | |
6de9cd9a DN |
3206 | |
3207 | if (state == COMP_CONTAINS) | |
3208 | { | |
3209 | state = gfc_state_stack->previous->state; | |
636dff67 SK |
3210 | block_name = gfc_state_stack->previous->sym == NULL |
3211 | ? NULL : gfc_state_stack->previous->sym->name; | |
6de9cd9a DN |
3212 | } |
3213 | ||
3214 | switch (state) | |
3215 | { | |
3216 | case COMP_NONE: | |
3217 | case COMP_PROGRAM: | |
3218 | *st = ST_END_PROGRAM; | |
3219 | target = " program"; | |
ddc9ce91 | 3220 | eos_ok = 1; |
6de9cd9a DN |
3221 | break; |
3222 | ||
3223 | case COMP_SUBROUTINE: | |
3224 | *st = ST_END_SUBROUTINE; | |
3225 | target = " subroutine"; | |
ddc9ce91 | 3226 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
3227 | break; |
3228 | ||
3229 | case COMP_FUNCTION: | |
3230 | *st = ST_END_FUNCTION; | |
3231 | target = " function"; | |
ddc9ce91 | 3232 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
3233 | break; |
3234 | ||
3235 | case COMP_BLOCK_DATA: | |
3236 | *st = ST_END_BLOCK_DATA; | |
3237 | target = " block data"; | |
ddc9ce91 | 3238 | eos_ok = 1; |
6de9cd9a DN |
3239 | break; |
3240 | ||
3241 | case COMP_MODULE: | |
3242 | *st = ST_END_MODULE; | |
3243 | target = " module"; | |
ddc9ce91 | 3244 | eos_ok = 1; |
6de9cd9a DN |
3245 | break; |
3246 | ||
3247 | case COMP_INTERFACE: | |
3248 | *st = ST_END_INTERFACE; | |
3249 | target = " interface"; | |
ddc9ce91 | 3250 | eos_ok = 0; |
6de9cd9a DN |
3251 | break; |
3252 | ||
3253 | case COMP_DERIVED: | |
3254 | *st = ST_END_TYPE; | |
3255 | target = " type"; | |
ddc9ce91 | 3256 | eos_ok = 0; |
6de9cd9a DN |
3257 | break; |
3258 | ||
3259 | case COMP_IF: | |
3260 | *st = ST_ENDIF; | |
3261 | target = " if"; | |
ddc9ce91 | 3262 | eos_ok = 0; |
6de9cd9a DN |
3263 | break; |
3264 | ||
3265 | case COMP_DO: | |
3266 | *st = ST_ENDDO; | |
3267 | target = " do"; | |
ddc9ce91 | 3268 | eos_ok = 0; |
6de9cd9a DN |
3269 | break; |
3270 | ||
3271 | case COMP_SELECT: | |
3272 | *st = ST_END_SELECT; | |
3273 | target = " select"; | |
ddc9ce91 | 3274 | eos_ok = 0; |
6de9cd9a DN |
3275 | break; |
3276 | ||
3277 | case COMP_FORALL: | |
3278 | *st = ST_END_FORALL; | |
3279 | target = " forall"; | |
ddc9ce91 | 3280 | eos_ok = 0; |
6de9cd9a DN |
3281 | break; |
3282 | ||
3283 | case COMP_WHERE: | |
3284 | *st = ST_END_WHERE; | |
3285 | target = " where"; | |
ddc9ce91 | 3286 | eos_ok = 0; |
6de9cd9a DN |
3287 | break; |
3288 | ||
25d8f0a2 TS |
3289 | case COMP_ENUM: |
3290 | *st = ST_END_ENUM; | |
3291 | target = " enum"; | |
3292 | eos_ok = 0; | |
3293 | last_initializer = NULL; | |
3294 | set_enum_kind (); | |
3295 | gfc_free_enum_history (); | |
3296 | break; | |
3297 | ||
6de9cd9a DN |
3298 | default: |
3299 | gfc_error ("Unexpected END statement at %C"); | |
3300 | goto cleanup; | |
3301 | } | |
3302 | ||
3303 | if (gfc_match_eos () == MATCH_YES) | |
3304 | { | |
ddc9ce91 | 3305 | if (!eos_ok) |
6de9cd9a | 3306 | { |
ddc9ce91 | 3307 | /* We would have required END [something] */ |
59ce85b5 TS |
3308 | gfc_error ("%s statement expected at %L", |
3309 | gfc_ascii_statement (*st), &old_loc); | |
6de9cd9a DN |
3310 | goto cleanup; |
3311 | } | |
3312 | ||
3313 | return MATCH_YES; | |
3314 | } | |
3315 | ||
3316 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
3317 | if (gfc_match (target) != MATCH_YES) | |
3318 | { | |
3319 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
3320 | goto cleanup; | |
3321 | } | |
3322 | ||
3323 | /* If we're at the end, make sure a block name wasn't required. */ | |
3324 | if (gfc_match_eos () == MATCH_YES) | |
3325 | { | |
3326 | ||
3327 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT) | |
3328 | return MATCH_YES; | |
3329 | ||
3330 | if (gfc_current_block () == NULL) | |
3331 | return MATCH_YES; | |
3332 | ||
3333 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
3334 | block_name, gfc_ascii_statement (*st)); | |
3335 | ||
3336 | return MATCH_ERROR; | |
3337 | } | |
3338 | ||
3339 | /* END INTERFACE has a special handler for its several possible endings. */ | |
3340 | if (*st == ST_END_INTERFACE) | |
3341 | return gfc_match_end_interface (); | |
3342 | ||
3343 | /* We haven't hit the end of statement, so what is left must be an end-name. */ | |
3344 | m = gfc_match_space (); | |
3345 | if (m == MATCH_YES) | |
3346 | m = gfc_match_name (name); | |
3347 | ||
3348 | if (m == MATCH_NO) | |
3349 | gfc_error ("Expected terminating name at %C"); | |
3350 | if (m != MATCH_YES) | |
3351 | goto cleanup; | |
3352 | ||
3353 | if (block_name == NULL) | |
3354 | goto syntax; | |
3355 | ||
3356 | if (strcmp (name, block_name) != 0) | |
3357 | { | |
3358 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
3359 | gfc_ascii_statement (*st)); | |
3360 | goto cleanup; | |
3361 | } | |
3362 | ||
3363 | if (gfc_match_eos () == MATCH_YES) | |
3364 | return MATCH_YES; | |
3365 | ||
3366 | syntax: | |
3367 | gfc_syntax_error (*st); | |
3368 | ||
3369 | cleanup: | |
63645982 | 3370 | gfc_current_locus = old_loc; |
6de9cd9a DN |
3371 | return MATCH_ERROR; |
3372 | } | |
3373 | ||
3374 | ||
3375 | ||
3376 | /***************** Attribute declaration statements ****************/ | |
3377 | ||
3378 | /* Set the attribute of a single variable. */ | |
3379 | ||
3380 | static match | |
3381 | attr_decl1 (void) | |
3382 | { | |
3383 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3384 | gfc_array_spec *as; | |
3385 | gfc_symbol *sym; | |
3386 | locus var_locus; | |
3387 | match m; | |
3388 | ||
3389 | as = NULL; | |
3390 | ||
3391 | m = gfc_match_name (name); | |
3392 | if (m != MATCH_YES) | |
3393 | goto cleanup; | |
3394 | ||
3395 | if (find_special (name, &sym)) | |
3396 | return MATCH_ERROR; | |
3397 | ||
63645982 | 3398 | var_locus = gfc_current_locus; |
6de9cd9a DN |
3399 | |
3400 | /* Deal with possible array specification for certain attributes. */ | |
3401 | if (current_attr.dimension | |
3402 | || current_attr.allocatable | |
3403 | || current_attr.pointer | |
3404 | || current_attr.target) | |
3405 | { | |
3406 | m = gfc_match_array_spec (&as); | |
3407 | if (m == MATCH_ERROR) | |
3408 | goto cleanup; | |
3409 | ||
3410 | if (current_attr.dimension && m == MATCH_NO) | |
3411 | { | |
636dff67 SK |
3412 | gfc_error ("Missing array specification at %L in DIMENSION " |
3413 | "statement", &var_locus); | |
6de9cd9a DN |
3414 | m = MATCH_ERROR; |
3415 | goto cleanup; | |
3416 | } | |
3417 | ||
3418 | if ((current_attr.allocatable || current_attr.pointer) | |
3419 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
3420 | { | |
636dff67 | 3421 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
6de9cd9a DN |
3422 | m = MATCH_ERROR; |
3423 | goto cleanup; | |
3424 | } | |
3425 | } | |
3426 | ||
636dff67 SK |
3427 | /* Update symbol table. DIMENSION attribute is set |
3428 | in gfc_set_array_spec(). */ | |
6de9cd9a DN |
3429 | if (current_attr.dimension == 0 |
3430 | && gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
3431 | { | |
3432 | m = MATCH_ERROR; | |
3433 | goto cleanup; | |
3434 | } | |
3435 | ||
3436 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
3437 | { | |
3438 | m = MATCH_ERROR; | |
3439 | goto cleanup; | |
3440 | } | |
83d890b9 AL |
3441 | |
3442 | if (sym->attr.cray_pointee && sym->as != NULL) | |
3443 | { | |
3444 | /* Fix the array spec. */ | |
3445 | m = gfc_mod_pointee_as (sym->as); | |
3446 | if (m == MATCH_ERROR) | |
3447 | goto cleanup; | |
3448 | } | |
6de9cd9a | 3449 | |
7114edca | 3450 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
1902704e PT |
3451 | { |
3452 | m = MATCH_ERROR; | |
3453 | goto cleanup; | |
3454 | } | |
3455 | ||
6de9cd9a DN |
3456 | if ((current_attr.external || current_attr.intrinsic) |
3457 | && sym->attr.flavor != FL_PROCEDURE | |
231b2fcc | 3458 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
3459 | { |
3460 | m = MATCH_ERROR; | |
3461 | goto cleanup; | |
3462 | } | |
3463 | ||
3464 | return MATCH_YES; | |
3465 | ||
3466 | cleanup: | |
3467 | gfc_free_array_spec (as); | |
3468 | return m; | |
3469 | } | |
3470 | ||
3471 | ||
3472 | /* Generic attribute declaration subroutine. Used for attributes that | |
3473 | just have a list of names. */ | |
3474 | ||
3475 | static match | |
3476 | attr_decl (void) | |
3477 | { | |
3478 | match m; | |
3479 | ||
3480 | /* Gobble the optional double colon, by simply ignoring the result | |
3481 | of gfc_match(). */ | |
3482 | gfc_match (" ::"); | |
3483 | ||
3484 | for (;;) | |
3485 | { | |
3486 | m = attr_decl1 (); | |
3487 | if (m != MATCH_YES) | |
3488 | break; | |
3489 | ||
3490 | if (gfc_match_eos () == MATCH_YES) | |
3491 | { | |
3492 | m = MATCH_YES; | |
3493 | break; | |
3494 | } | |
3495 | ||
3496 | if (gfc_match_char (',') != MATCH_YES) | |
3497 | { | |
3498 | gfc_error ("Unexpected character in variable list at %C"); | |
3499 | m = MATCH_ERROR; | |
3500 | break; | |
3501 | } | |
3502 | } | |
3503 | ||
3504 | return m; | |
3505 | } | |
3506 | ||
3507 | ||
83d890b9 AL |
3508 | /* This routine matches Cray Pointer declarations of the form: |
3509 | pointer ( <pointer>, <pointee> ) | |
3510 | or | |
3511 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... | |
3512 | The pointer, if already declared, should be an integer. Otherwise, we | |
3513 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may | |
3514 | be either a scalar, or an array declaration. No space is allocated for | |
3515 | the pointee. For the statement | |
3516 | pointer (ipt, ar(10)) | |
3517 | any subsequent uses of ar will be translated (in C-notation) as | |
3518 | ar(i) => ((<type> *) ipt)(i) | |
b122dc6a | 3519 | After gimplification, pointee variable will disappear in the code. */ |
83d890b9 AL |
3520 | |
3521 | static match | |
3522 | cray_pointer_decl (void) | |
3523 | { | |
3524 | match m; | |
3525 | gfc_array_spec *as; | |
3526 | gfc_symbol *cptr; /* Pointer symbol. */ | |
3527 | gfc_symbol *cpte; /* Pointee symbol. */ | |
3528 | locus var_locus; | |
3529 | bool done = false; | |
3530 | ||
3531 | while (!done) | |
3532 | { | |
3533 | if (gfc_match_char ('(') != MATCH_YES) | |
3534 | { | |
3535 | gfc_error ("Expected '(' at %C"); | |
3536 | return MATCH_ERROR; | |
3537 | } | |
3538 | ||
3539 | /* Match pointer. */ | |
3540 | var_locus = gfc_current_locus; | |
3541 | gfc_clear_attr (¤t_attr); | |
3542 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
3543 | current_ts.type = BT_INTEGER; | |
3544 | current_ts.kind = gfc_index_integer_kind; | |
3545 | ||
3546 | m = gfc_match_symbol (&cptr, 0); | |
3547 | if (m != MATCH_YES) | |
3548 | { | |
3549 | gfc_error ("Expected variable name at %C"); | |
3550 | return m; | |
3551 | } | |
3552 | ||
3553 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) | |
3554 | return MATCH_ERROR; | |
3555 | ||
3556 | gfc_set_sym_referenced (cptr); | |
3557 | ||
3558 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
3559 | { | |
3560 | cptr->ts.type = BT_INTEGER; | |
3561 | cptr->ts.kind = gfc_index_integer_kind; | |
3562 | } | |
3563 | else if (cptr->ts.type != BT_INTEGER) | |
3564 | { | |
e25a0da3 | 3565 | gfc_error ("Cray pointer at %C must be an integer"); |
83d890b9 AL |
3566 | return MATCH_ERROR; |
3567 | } | |
3568 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
3569 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
e25a0da3 | 3570 | " memory addresses require %d bytes", |
636dff67 | 3571 | cptr->ts.kind, gfc_index_integer_kind); |
83d890b9 AL |
3572 | |
3573 | if (gfc_match_char (',') != MATCH_YES) | |
3574 | { | |
3575 | gfc_error ("Expected \",\" at %C"); | |
3576 | return MATCH_ERROR; | |
3577 | } | |
3578 | ||
3579 | /* Match Pointee. */ | |
3580 | var_locus = gfc_current_locus; | |
3581 | gfc_clear_attr (¤t_attr); | |
3582 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
3583 | current_ts.type = BT_UNKNOWN; | |
3584 | current_ts.kind = 0; | |
3585 | ||
3586 | m = gfc_match_symbol (&cpte, 0); | |
3587 | if (m != MATCH_YES) | |
3588 | { | |
3589 | gfc_error ("Expected variable name at %C"); | |
3590 | return m; | |
3591 | } | |
3592 | ||
3593 | /* Check for an optional array spec. */ | |
3594 | m = gfc_match_array_spec (&as); | |
3595 | if (m == MATCH_ERROR) | |
3596 | { | |
3597 | gfc_free_array_spec (as); | |
3598 | return m; | |
3599 | } | |
3600 | else if (m == MATCH_NO) | |
3601 | { | |
3602 | gfc_free_array_spec (as); | |
3603 | as = NULL; | |
3604 | } | |
3605 | ||
3606 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
3607 | return MATCH_ERROR; | |
3608 | ||
3609 | gfc_set_sym_referenced (cpte); | |
3610 | ||
3611 | if (cpte->as == NULL) | |
3612 | { | |
3613 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
3614 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
3615 | } | |
3616 | else if (as != NULL) | |
3617 | { | |
e25a0da3 | 3618 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
83d890b9 AL |
3619 | gfc_free_array_spec (as); |
3620 | return MATCH_ERROR; | |
3621 | } | |
3622 | ||
3623 | as = NULL; | |
3624 | ||
3625 | if (cpte->as != NULL) | |
3626 | { | |
3627 | /* Fix array spec. */ | |
3628 | m = gfc_mod_pointee_as (cpte->as); | |
3629 | if (m == MATCH_ERROR) | |
3630 | return m; | |
3631 | } | |
3632 | ||
3633 | /* Point the Pointee at the Pointer. */ | |
b122dc6a | 3634 | cpte->cp_pointer = cptr; |
83d890b9 AL |
3635 | |
3636 | if (gfc_match_char (')') != MATCH_YES) | |
3637 | { | |
3638 | gfc_error ("Expected \")\" at %C"); | |
3639 | return MATCH_ERROR; | |
3640 | } | |
3641 | m = gfc_match_char (','); | |
3642 | if (m != MATCH_YES) | |
3643 | done = true; /* Stop searching for more declarations. */ | |
3644 | ||
3645 | } | |
3646 | ||
3647 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
3648 | || gfc_match_eos () != MATCH_YES) | |
3649 | { | |
3650 | gfc_error ("Expected \",\" or end of statement at %C"); | |
3651 | return MATCH_ERROR; | |
3652 | } | |
3653 | return MATCH_YES; | |
3654 | } | |
3655 | ||
3656 | ||
6de9cd9a DN |
3657 | match |
3658 | gfc_match_external (void) | |
3659 | { | |
3660 | ||
3661 | gfc_clear_attr (¤t_attr); | |
1902704e | 3662 | current_attr.external = 1; |
6de9cd9a DN |
3663 | |
3664 | return attr_decl (); | |
3665 | } | |
3666 | ||
3667 | ||
6de9cd9a DN |
3668 | match |
3669 | gfc_match_intent (void) | |
3670 | { | |
3671 | sym_intent intent; | |
3672 | ||
3673 | intent = match_intent_spec (); | |
3674 | if (intent == INTENT_UNKNOWN) | |
3675 | return MATCH_ERROR; | |
3676 | ||
3677 | gfc_clear_attr (¤t_attr); | |
1902704e | 3678 | current_attr.intent = intent; |
6de9cd9a DN |
3679 | |
3680 | return attr_decl (); | |
3681 | } | |
3682 | ||
3683 | ||
3684 | match | |
3685 | gfc_match_intrinsic (void) | |
3686 | { | |
3687 | ||
3688 | gfc_clear_attr (¤t_attr); | |
1902704e | 3689 | current_attr.intrinsic = 1; |
6de9cd9a DN |
3690 | |
3691 | return attr_decl (); | |
3692 | } | |
3693 | ||
3694 | ||
3695 | match | |
3696 | gfc_match_optional (void) | |
3697 | { | |
3698 | ||
3699 | gfc_clear_attr (¤t_attr); | |
1902704e | 3700 | current_attr.optional = 1; |
6de9cd9a DN |
3701 | |
3702 | return attr_decl (); | |
3703 | } | |
3704 | ||
3705 | ||
3706 | match | |
3707 | gfc_match_pointer (void) | |
3708 | { | |
83d890b9 AL |
3709 | gfc_gobble_whitespace (); |
3710 | if (gfc_peek_char () == '(') | |
3711 | { | |
3712 | if (!gfc_option.flag_cray_pointer) | |
3713 | { | |
636dff67 SK |
3714 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
3715 | "flag"); | |
83d890b9 AL |
3716 | return MATCH_ERROR; |
3717 | } | |
3718 | return cray_pointer_decl (); | |
3719 | } | |
3720 | else | |
3721 | { | |
3722 | gfc_clear_attr (¤t_attr); | |
1902704e | 3723 | current_attr.pointer = 1; |
83d890b9 AL |
3724 | |
3725 | return attr_decl (); | |
3726 | } | |
6de9cd9a DN |
3727 | } |
3728 | ||
3729 | ||
3730 | match | |
3731 | gfc_match_allocatable (void) | |
3732 | { | |
6de9cd9a | 3733 | gfc_clear_attr (¤t_attr); |
1902704e | 3734 | current_attr.allocatable = 1; |
6de9cd9a DN |
3735 | |
3736 | return attr_decl (); | |
3737 | } | |
3738 | ||
3739 | ||
3740 | match | |
3741 | gfc_match_dimension (void) | |
3742 | { | |
6de9cd9a | 3743 | gfc_clear_attr (¤t_attr); |
1902704e | 3744 | current_attr.dimension = 1; |
6de9cd9a DN |
3745 | |
3746 | return attr_decl (); | |
3747 | } | |
3748 | ||
3749 | ||
3750 | match | |
3751 | gfc_match_target (void) | |
3752 | { | |
6de9cd9a | 3753 | gfc_clear_attr (¤t_attr); |
1902704e | 3754 | current_attr.target = 1; |
6de9cd9a DN |
3755 | |
3756 | return attr_decl (); | |
3757 | } | |
3758 | ||
3759 | ||
3760 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
3761 | statement. */ | |
3762 | ||
3763 | static match | |
3764 | access_attr_decl (gfc_statement st) | |
3765 | { | |
3766 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3767 | interface_type type; | |
3768 | gfc_user_op *uop; | |
3769 | gfc_symbol *sym; | |
3770 | gfc_intrinsic_op operator; | |
3771 | match m; | |
3772 | ||
3773 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
3774 | goto done; | |
3775 | ||
3776 | for (;;) | |
3777 | { | |
3778 | m = gfc_match_generic_spec (&type, name, &operator); | |
3779 | if (m == MATCH_NO) | |
3780 | goto syntax; | |
3781 | if (m == MATCH_ERROR) | |
3782 | return MATCH_ERROR; | |
3783 | ||
3784 | switch (type) | |
3785 | { | |
3786 | case INTERFACE_NAMELESS: | |
3787 | goto syntax; | |
3788 | ||
3789 | case INTERFACE_GENERIC: | |
3790 | if (gfc_get_symbol (name, NULL, &sym)) | |
3791 | goto done; | |
3792 | ||
636dff67 SK |
3793 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
3794 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
231b2fcc | 3795 | sym->name, NULL) == FAILURE) |
6de9cd9a DN |
3796 | return MATCH_ERROR; |
3797 | ||
3798 | break; | |
3799 | ||
3800 | case INTERFACE_INTRINSIC_OP: | |
3801 | if (gfc_current_ns->operator_access[operator] == ACCESS_UNKNOWN) | |
3802 | { | |
3803 | gfc_current_ns->operator_access[operator] = | |
3804 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
3805 | } | |
3806 | else | |
3807 | { | |
3808 | gfc_error ("Access specification of the %s operator at %C has " | |
3809 | "already been specified", gfc_op2string (operator)); | |
3810 | goto done; | |
3811 | } | |
3812 | ||
3813 | break; | |
3814 | ||
3815 | case INTERFACE_USER_OP: | |
3816 | uop = gfc_get_uop (name); | |
3817 | ||
3818 | if (uop->access == ACCESS_UNKNOWN) | |
3819 | { | |
636dff67 SK |
3820 | uop->access = (st == ST_PUBLIC) |
3821 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
6de9cd9a DN |
3822 | } |
3823 | else | |
3824 | { | |
636dff67 SK |
3825 | gfc_error ("Access specification of the .%s. operator at %C " |
3826 | "has already been specified", sym->name); | |
6de9cd9a DN |
3827 | goto done; |
3828 | } | |
3829 | ||
3830 | break; | |
3831 | } | |
3832 | ||
3833 | if (gfc_match_char (',') == MATCH_NO) | |
3834 | break; | |
3835 | } | |
3836 | ||
3837 | if (gfc_match_eos () != MATCH_YES) | |
3838 | goto syntax; | |
3839 | return MATCH_YES; | |
3840 | ||
3841 | syntax: | |
3842 | gfc_syntax_error (st); | |
3843 | ||
3844 | done: | |
3845 | return MATCH_ERROR; | |
3846 | } | |
3847 | ||
3848 | ||
ee7e677f TB |
3849 | match |
3850 | gfc_match_protected (void) | |
3851 | { | |
3852 | gfc_symbol *sym; | |
3853 | match m; | |
3854 | ||
3855 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
3856 | { | |
3857 | gfc_error ("PROTECTED at %C only allowed in specification " | |
3858 | "part of a module"); | |
3859 | return MATCH_ERROR; | |
3860 | ||
3861 | } | |
3862 | ||
636dff67 | 3863 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
ee7e677f TB |
3864 | == FAILURE) |
3865 | return MATCH_ERROR; | |
3866 | ||
3867 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
3868 | { | |
3869 | return MATCH_ERROR; | |
3870 | } | |
3871 | ||
3872 | if (gfc_match_eos () == MATCH_YES) | |
3873 | goto syntax; | |
3874 | ||
3875 | for(;;) | |
3876 | { | |
3877 | m = gfc_match_symbol (&sym, 0); | |
3878 | switch (m) | |
3879 | { | |
3880 | case MATCH_YES: | |
636dff67 SK |
3881 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
3882 | == FAILURE) | |
ee7e677f TB |
3883 | return MATCH_ERROR; |
3884 | goto next_item; | |
3885 | ||
3886 | case MATCH_NO: | |
3887 | break; | |
3888 | ||
3889 | case MATCH_ERROR: | |
3890 | return MATCH_ERROR; | |
3891 | } | |
3892 | ||
3893 | next_item: | |
3894 | if (gfc_match_eos () == MATCH_YES) | |
3895 | break; | |
3896 | if (gfc_match_char (',') != MATCH_YES) | |
3897 | goto syntax; | |
3898 | } | |
3899 | ||
3900 | return MATCH_YES; | |
3901 | ||
3902 | syntax: | |
3903 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
3904 | return MATCH_ERROR; | |
3905 | } | |
3906 | ||
3907 | ||
6de9cd9a DN |
3908 | /* The PRIVATE statement is a bit weird in that it can be a attribute |
3909 | declaration, but also works as a standlone statement inside of a | |
3910 | type declaration or a module. */ | |
3911 | ||
3912 | match | |
636dff67 | 3913 | gfc_match_private (gfc_statement *st) |
6de9cd9a DN |
3914 | { |
3915 | ||
3916 | if (gfc_match ("private") != MATCH_YES) | |
3917 | return MATCH_NO; | |
3918 | ||
3919 | if (gfc_current_state () == COMP_DERIVED) | |
3920 | { | |
3921 | if (gfc_match_eos () == MATCH_YES) | |
3922 | { | |
3923 | *st = ST_PRIVATE; | |
3924 | return MATCH_YES; | |
3925 | } | |
3926 | ||
3927 | gfc_syntax_error (ST_PRIVATE); | |
3928 | return MATCH_ERROR; | |
3929 | } | |
3930 | ||
3931 | if (gfc_match_eos () == MATCH_YES) | |
3932 | { | |
3933 | *st = ST_PRIVATE; | |
3934 | return MATCH_YES; | |
3935 | } | |
3936 | ||
3937 | *st = ST_ATTR_DECL; | |
3938 | return access_attr_decl (ST_PRIVATE); | |
3939 | } | |
3940 | ||
3941 | ||
3942 | match | |
636dff67 | 3943 | gfc_match_public (gfc_statement *st) |
6de9cd9a DN |
3944 | { |
3945 | ||
3946 | if (gfc_match ("public") != MATCH_YES) | |
3947 | return MATCH_NO; | |
3948 | ||
3949 | if (gfc_match_eos () == MATCH_YES) | |
3950 | { | |
3951 | *st = ST_PUBLIC; | |
3952 | return MATCH_YES; | |
3953 | } | |
3954 | ||
3955 | *st = ST_ATTR_DECL; | |
3956 | return access_attr_decl (ST_PUBLIC); | |
3957 | } | |
3958 | ||
3959 | ||
3960 | /* Workhorse for gfc_match_parameter. */ | |
3961 | ||
3962 | static match | |
3963 | do_parm (void) | |
3964 | { | |
3965 | gfc_symbol *sym; | |
3966 | gfc_expr *init; | |
3967 | match m; | |
3968 | ||
3969 | m = gfc_match_symbol (&sym, 0); | |
3970 | if (m == MATCH_NO) | |
3971 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
3972 | ||
3973 | if (m != MATCH_YES) | |
3974 | return m; | |
3975 | ||
3976 | if (gfc_match_char ('=') == MATCH_NO) | |
3977 | { | |
3978 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
3979 | return MATCH_ERROR; | |
3980 | } | |
3981 | ||
3982 | m = gfc_match_init_expr (&init); | |
3983 | if (m == MATCH_NO) | |
3984 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
3985 | if (m != MATCH_YES) | |
3986 | return m; | |
3987 | ||
3988 | if (sym->ts.type == BT_UNKNOWN | |
3989 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
3990 | { | |
3991 | m = MATCH_ERROR; | |
3992 | goto cleanup; | |
3993 | } | |
3994 | ||
3995 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
231b2fcc | 3996 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
3997 | { |
3998 | m = MATCH_ERROR; | |
3999 | goto cleanup; | |
4000 | } | |
4001 | ||
7e2eba4b DE |
4002 | if (sym->ts.type == BT_CHARACTER |
4003 | && sym->ts.cl != NULL | |
4004 | && sym->ts.cl->length != NULL | |
4005 | && sym->ts.cl->length->expr_type == EXPR_CONSTANT | |
4006 | && init->expr_type == EXPR_CONSTANT | |
4007 | && init->ts.type == BT_CHARACTER | |
4008 | && init->ts.kind == 1) | |
4009 | gfc_set_constant_character_len ( | |
2220652d | 4010 | mpz_get_si (sym->ts.cl->length->value.integer), init, false); |
7e2eba4b | 4011 | |
6de9cd9a DN |
4012 | sym->value = init; |
4013 | return MATCH_YES; | |
4014 | ||
4015 | cleanup: | |
4016 | gfc_free_expr (init); | |
4017 | return m; | |
4018 | } | |
4019 | ||
4020 | ||
4021 | /* Match a parameter statement, with the weird syntax that these have. */ | |
4022 | ||
4023 | match | |
4024 | gfc_match_parameter (void) | |
4025 | { | |
4026 | match m; | |
4027 | ||
4028 | if (gfc_match_char ('(') == MATCH_NO) | |
4029 | return MATCH_NO; | |
4030 | ||
4031 | for (;;) | |
4032 | { | |
4033 | m = do_parm (); | |
4034 | if (m != MATCH_YES) | |
4035 | break; | |
4036 | ||
4037 | if (gfc_match (" )%t") == MATCH_YES) | |
4038 | break; | |
4039 | ||
4040 | if (gfc_match_char (',') != MATCH_YES) | |
4041 | { | |
4042 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
4043 | m = MATCH_ERROR; | |
4044 | break; | |
4045 | } | |
4046 | } | |
4047 | ||
4048 | return m; | |
4049 | } | |
4050 | ||
4051 | ||
4052 | /* Save statements have a special syntax. */ | |
4053 | ||
4054 | match | |
4055 | gfc_match_save (void) | |
4056 | { | |
9056bd70 TS |
4057 | char n[GFC_MAX_SYMBOL_LEN+1]; |
4058 | gfc_common_head *c; | |
6de9cd9a DN |
4059 | gfc_symbol *sym; |
4060 | match m; | |
4061 | ||
4062 | if (gfc_match_eos () == MATCH_YES) | |
4063 | { | |
4064 | if (gfc_current_ns->seen_save) | |
4065 | { | |
636dff67 SK |
4066 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
4067 | "follows previous SAVE statement") | |
09e87839 AL |
4068 | == FAILURE) |
4069 | return MATCH_ERROR; | |
6de9cd9a DN |
4070 | } |
4071 | ||
4072 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
4073 | return MATCH_YES; | |
4074 | } | |
4075 | ||
4076 | if (gfc_current_ns->save_all) | |
4077 | { | |
636dff67 SK |
4078 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
4079 | "blanket SAVE statement") | |
09e87839 AL |
4080 | == FAILURE) |
4081 | return MATCH_ERROR; | |
6de9cd9a DN |
4082 | } |
4083 | ||
4084 | gfc_match (" ::"); | |
4085 | ||
4086 | for (;;) | |
4087 | { | |
4088 | m = gfc_match_symbol (&sym, 0); | |
4089 | switch (m) | |
4090 | { | |
4091 | case MATCH_YES: | |
636dff67 SK |
4092 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
4093 | == FAILURE) | |
6de9cd9a DN |
4094 | return MATCH_ERROR; |
4095 | goto next_item; | |
4096 | ||
4097 | case MATCH_NO: | |
4098 | break; | |
4099 | ||
4100 | case MATCH_ERROR: | |
4101 | return MATCH_ERROR; | |
4102 | } | |
4103 | ||
9056bd70 | 4104 | m = gfc_match (" / %n /", &n); |
6de9cd9a DN |
4105 | if (m == MATCH_ERROR) |
4106 | return MATCH_ERROR; | |
4107 | if (m == MATCH_NO) | |
4108 | goto syntax; | |
4109 | ||
53814b8f | 4110 | c = gfc_get_common (n, 0); |
9056bd70 TS |
4111 | c->saved = 1; |
4112 | ||
6de9cd9a DN |
4113 | gfc_current_ns->seen_save = 1; |
4114 | ||
4115 | next_item: | |
4116 | if (gfc_match_eos () == MATCH_YES) | |
4117 | break; | |
4118 | if (gfc_match_char (',') != MATCH_YES) | |
4119 | goto syntax; | |
4120 | } | |
4121 | ||
4122 | return MATCH_YES; | |
4123 | ||
4124 | syntax: | |
4125 | gfc_error ("Syntax error in SAVE statement at %C"); | |
4126 | return MATCH_ERROR; | |
4127 | } | |
4128 | ||
4129 | ||
06469efd PT |
4130 | match |
4131 | gfc_match_value (void) | |
4132 | { | |
4133 | gfc_symbol *sym; | |
4134 | match m; | |
4135 | ||
636dff67 | 4136 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
06469efd PT |
4137 | == FAILURE) |
4138 | return MATCH_ERROR; | |
4139 | ||
4140 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
4141 | { | |
4142 | return MATCH_ERROR; | |
4143 | } | |
4144 | ||
4145 | if (gfc_match_eos () == MATCH_YES) | |
4146 | goto syntax; | |
4147 | ||
4148 | for(;;) | |
4149 | { | |
4150 | m = gfc_match_symbol (&sym, 0); | |
4151 | switch (m) | |
4152 | { | |
4153 | case MATCH_YES: | |
636dff67 SK |
4154 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
4155 | == FAILURE) | |
06469efd PT |
4156 | return MATCH_ERROR; |
4157 | goto next_item; | |
4158 | ||
4159 | case MATCH_NO: | |
4160 | break; | |
4161 | ||
4162 | case MATCH_ERROR: | |
4163 | return MATCH_ERROR; | |
4164 | } | |
4165 | ||
4166 | next_item: | |
4167 | if (gfc_match_eos () == MATCH_YES) | |
4168 | break; | |
4169 | if (gfc_match_char (',') != MATCH_YES) | |
4170 | goto syntax; | |
4171 | } | |
4172 | ||
4173 | return MATCH_YES; | |
4174 | ||
4175 | syntax: | |
4176 | gfc_error ("Syntax error in VALUE statement at %C"); | |
4177 | return MATCH_ERROR; | |
4178 | } | |
4179 | ||
775e6c3a TB |
4180 | match |
4181 | gfc_match_volatile (void) | |
4182 | { | |
4183 | gfc_symbol *sym; | |
4184 | match m; | |
4185 | ||
636dff67 | 4186 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
775e6c3a TB |
4187 | == FAILURE) |
4188 | return MATCH_ERROR; | |
4189 | ||
4190 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
4191 | { | |
4192 | return MATCH_ERROR; | |
4193 | } | |
4194 | ||
4195 | if (gfc_match_eos () == MATCH_YES) | |
4196 | goto syntax; | |
4197 | ||
4198 | for(;;) | |
4199 | { | |
9bce3c1c TB |
4200 | /* VOLATILE is special because it can be added to host-associated |
4201 | symbols locally. */ | |
4202 | m = gfc_match_symbol (&sym, 1); | |
775e6c3a TB |
4203 | switch (m) |
4204 | { | |
4205 | case MATCH_YES: | |
636dff67 SK |
4206 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
4207 | == FAILURE) | |
775e6c3a TB |
4208 | return MATCH_ERROR; |
4209 | goto next_item; | |
4210 | ||
4211 | case MATCH_NO: | |
4212 | break; | |
4213 | ||
4214 | case MATCH_ERROR: | |
4215 | return MATCH_ERROR; | |
4216 | } | |
4217 | ||
4218 | next_item: | |
4219 | if (gfc_match_eos () == MATCH_YES) | |
4220 | break; | |
4221 | if (gfc_match_char (',') != MATCH_YES) | |
4222 | goto syntax; | |
4223 | } | |
4224 | ||
4225 | return MATCH_YES; | |
4226 | ||
4227 | syntax: | |
4228 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
4229 | return MATCH_ERROR; | |
4230 | } | |
4231 | ||
4232 | ||
4233 | ||
6de9cd9a DN |
4234 | /* Match a module procedure statement. Note that we have to modify |
4235 | symbols in the parent's namespace because the current one was there | |
49de9e73 | 4236 | to receive symbols that are in an interface's formal argument list. */ |
6de9cd9a DN |
4237 | |
4238 | match | |
4239 | gfc_match_modproc (void) | |
4240 | { | |
4241 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4242 | gfc_symbol *sym; | |
4243 | match m; | |
4244 | ||
4245 | if (gfc_state_stack->state != COMP_INTERFACE | |
4246 | || gfc_state_stack->previous == NULL | |
4247 | || current_interface.type == INTERFACE_NAMELESS) | |
4248 | { | |
636dff67 SK |
4249 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
4250 | "interface"); | |
6de9cd9a DN |
4251 | return MATCH_ERROR; |
4252 | } | |
4253 | ||
4254 | for (;;) | |
4255 | { | |
4256 | m = gfc_match_name (name); | |
4257 | if (m == MATCH_NO) | |
4258 | goto syntax; | |
4259 | if (m != MATCH_YES) | |
4260 | return MATCH_ERROR; | |
4261 | ||
4262 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
4263 | return MATCH_ERROR; | |
4264 | ||
4265 | if (sym->attr.proc != PROC_MODULE | |
231b2fcc TS |
4266 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
4267 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
4268 | return MATCH_ERROR; |
4269 | ||
4270 | if (gfc_add_interface (sym) == FAILURE) | |
4271 | return MATCH_ERROR; | |
4272 | ||
71f77fd7 PT |
4273 | sym->attr.mod_proc = 1; |
4274 | ||
6de9cd9a DN |
4275 | if (gfc_match_eos () == MATCH_YES) |
4276 | break; | |
4277 | if (gfc_match_char (',') != MATCH_YES) | |
4278 | goto syntax; | |
4279 | } | |
4280 | ||
4281 | return MATCH_YES; | |
4282 | ||
4283 | syntax: | |
4284 | gfc_syntax_error (ST_MODULE_PROC); | |
4285 | return MATCH_ERROR; | |
4286 | } | |
4287 | ||
4288 | ||
4289 | /* Match the beginning of a derived type declaration. If a type name | |
4290 | was the result of a function, then it is possible to have a symbol | |
4291 | already to be known as a derived type yet have no components. */ | |
4292 | ||
4293 | match | |
4294 | gfc_match_derived_decl (void) | |
4295 | { | |
4296 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4297 | symbol_attribute attr; | |
4298 | gfc_symbol *sym; | |
4299 | match m; | |
4300 | ||
4301 | if (gfc_current_state () == COMP_DERIVED) | |
4302 | return MATCH_NO; | |
4303 | ||
4304 | gfc_clear_attr (&attr); | |
4305 | ||
4306 | loop: | |
4307 | if (gfc_match (" , private") == MATCH_YES) | |
4308 | { | |
4309 | if (gfc_find_state (COMP_MODULE) == FAILURE) | |
4310 | { | |
636dff67 | 4311 | gfc_error ("Derived type at %C can only be PRIVATE within a MODULE"); |
6de9cd9a DN |
4312 | return MATCH_ERROR; |
4313 | } | |
4314 | ||
231b2fcc | 4315 | if (gfc_add_access (&attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
6de9cd9a DN |
4316 | return MATCH_ERROR; |
4317 | goto loop; | |
4318 | } | |
4319 | ||
4320 | if (gfc_match (" , public") == MATCH_YES) | |
4321 | { | |
4322 | if (gfc_find_state (COMP_MODULE) == FAILURE) | |
4323 | { | |
4324 | gfc_error ("Derived type at %C can only be PUBLIC within a MODULE"); | |
4325 | return MATCH_ERROR; | |
4326 | } | |
4327 | ||
231b2fcc | 4328 | if (gfc_add_access (&attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
6de9cd9a DN |
4329 | return MATCH_ERROR; |
4330 | goto loop; | |
4331 | } | |
4332 | ||
4333 | if (gfc_match (" ::") != MATCH_YES && attr.access != ACCESS_UNKNOWN) | |
4334 | { | |
4335 | gfc_error ("Expected :: in TYPE definition at %C"); | |
4336 | return MATCH_ERROR; | |
4337 | } | |
4338 | ||
4339 | m = gfc_match (" %n%t", name); | |
4340 | if (m != MATCH_YES) | |
4341 | return m; | |
4342 | ||
4343 | /* Make sure the name isn't the name of an intrinsic type. The | |
1e863adf TS |
4344 | 'double {precision,complex}' types don't get past the name |
4345 | matcher, unless they're written as a single word or in fixed | |
4346 | form. */ | |
6de9cd9a DN |
4347 | if (strcmp (name, "integer") == 0 |
4348 | || strcmp (name, "real") == 0 | |
4349 | || strcmp (name, "character") == 0 | |
4350 | || strcmp (name, "logical") == 0 | |
1e863adf TS |
4351 | || strcmp (name, "complex") == 0 |
4352 | || strcmp (name, "doubleprecision") == 0 | |
4353 | || strcmp (name, "doublecomplex") == 0) | |
6de9cd9a | 4354 | { |
636dff67 SK |
4355 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
4356 | "type", name); | |
6de9cd9a DN |
4357 | return MATCH_ERROR; |
4358 | } | |
4359 | ||
4360 | if (gfc_get_symbol (name, NULL, &sym)) | |
4361 | return MATCH_ERROR; | |
4362 | ||
4363 | if (sym->ts.type != BT_UNKNOWN) | |
4364 | { | |
4365 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
4366 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
4367 | return MATCH_ERROR; | |
4368 | } | |
4369 | ||
4370 | /* The symbol may already have the derived attribute without the | |
4371 | components. The ways this can happen is via a function | |
4372 | definition, an INTRINSIC statement or a subtype in another | |
4373 | derived type that is a pointer. The first part of the AND clause | |
f7b529fa | 4374 | is true if a the symbol is not the return value of a function. */ |
6de9cd9a | 4375 | if (sym->attr.flavor != FL_DERIVED |
231b2fcc | 4376 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
4377 | return MATCH_ERROR; |
4378 | ||
4379 | if (sym->components != NULL) | |
4380 | { | |
636dff67 SK |
4381 | gfc_error ("Derived type definition of '%s' at %C has already been " |
4382 | "defined", sym->name); | |
6de9cd9a DN |
4383 | return MATCH_ERROR; |
4384 | } | |
4385 | ||
4386 | if (attr.access != ACCESS_UNKNOWN | |
231b2fcc | 4387 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
4388 | return MATCH_ERROR; |
4389 | ||
4390 | gfc_new_block = sym; | |
4391 | ||
4392 | return MATCH_YES; | |
4393 | } | |
83d890b9 AL |
4394 | |
4395 | ||
4396 | /* Cray Pointees can be declared as: | |
4397 | pointer (ipt, a (n,m,...,*)) | |
4398 | By default, this is treated as an AS_ASSUMED_SIZE array. We'll | |
4399 | cheat and set a constant bound of 1 for the last dimension, if this | |
4400 | is the case. Since there is no bounds-checking for Cray Pointees, | |
4401 | this will be okay. */ | |
4402 | ||
4403 | try | |
4404 | gfc_mod_pointee_as (gfc_array_spec *as) | |
4405 | { | |
4406 | as->cray_pointee = true; /* This will be useful to know later. */ | |
4407 | if (as->type == AS_ASSUMED_SIZE) | |
4408 | { | |
4409 | as->type = AS_EXPLICIT; | |
4410 | as->upper[as->rank - 1] = gfc_int_expr (1); | |
4411 | as->cp_was_assumed = true; | |
4412 | } | |
4413 | else if (as->type == AS_ASSUMED_SHAPE) | |
4414 | { | |
4415 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
4416 | return MATCH_ERROR; | |
4417 | } | |
4418 | return MATCH_YES; | |
4419 | } | |
25d8f0a2 TS |
4420 | |
4421 | ||
4422 | /* Match the enum definition statement, here we are trying to match | |
4423 | the first line of enum definition statement. | |
4424 | Returns MATCH_YES if match is found. */ | |
4425 | ||
4426 | match | |
4427 | gfc_match_enum (void) | |
4428 | { | |
4429 | match m; | |
4430 | ||
4431 | m = gfc_match_eos (); | |
4432 | if (m != MATCH_YES) | |
4433 | return m; | |
4434 | ||
6133c68a | 4435 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") |
25d8f0a2 TS |
4436 | == FAILURE) |
4437 | return MATCH_ERROR; | |
4438 | ||
4439 | return MATCH_YES; | |
4440 | } | |
4441 | ||
4442 | ||
6133c68a TS |
4443 | /* Match a variable name with an optional initializer. When this |
4444 | subroutine is called, a variable is expected to be parsed next. | |
4445 | Depending on what is happening at the moment, updates either the | |
4446 | symbol table or the current interface. */ | |
4447 | ||
4448 | static match | |
4449 | enumerator_decl (void) | |
4450 | { | |
4451 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4452 | gfc_expr *initializer; | |
4453 | gfc_array_spec *as = NULL; | |
4454 | gfc_symbol *sym; | |
4455 | locus var_locus; | |
4456 | match m; | |
4457 | try t; | |
4458 | locus old_locus; | |
4459 | ||
4460 | initializer = NULL; | |
4461 | old_locus = gfc_current_locus; | |
4462 | ||
4463 | /* When we get here, we've just matched a list of attributes and | |
4464 | maybe a type and a double colon. The next thing we expect to see | |
4465 | is the name of the symbol. */ | |
4466 | m = gfc_match_name (name); | |
4467 | if (m != MATCH_YES) | |
4468 | goto cleanup; | |
4469 | ||
4470 | var_locus = gfc_current_locus; | |
4471 | ||
4472 | /* OK, we've successfully matched the declaration. Now put the | |
4473 | symbol in the current namespace. If we fail to create the symbol, | |
4474 | bail out. */ | |
4475 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
4476 | { | |
4477 | m = MATCH_ERROR; | |
4478 | goto cleanup; | |
4479 | } | |
4480 | ||
4481 | /* The double colon must be present in order to have initializers. | |
4482 | Otherwise the statement is ambiguous with an assignment statement. */ | |
4483 | if (colon_seen) | |
4484 | { | |
4485 | if (gfc_match_char ('=') == MATCH_YES) | |
4486 | { | |
4487 | m = gfc_match_init_expr (&initializer); | |
4488 | if (m == MATCH_NO) | |
4489 | { | |
4490 | gfc_error ("Expected an initialization expression at %C"); | |
4491 | m = MATCH_ERROR; | |
4492 | } | |
4493 | ||
4494 | if (m != MATCH_YES) | |
4495 | goto cleanup; | |
4496 | } | |
4497 | } | |
4498 | ||
4499 | /* If we do not have an initializer, the initialization value of the | |
4500 | previous enumerator (stored in last_initializer) is incremented | |
4501 | by 1 and is used to initialize the current enumerator. */ | |
4502 | if (initializer == NULL) | |
4503 | initializer = gfc_enum_initializer (last_initializer, old_locus); | |
4504 | ||
4505 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) | |
4506 | { | |
4507 | gfc_error("ENUMERATOR %L not initialized with integer expression", | |
4508 | &var_locus); | |
4509 | m = MATCH_ERROR; | |
4510 | gfc_free_enum_history (); | |
4511 | goto cleanup; | |
4512 | } | |
4513 | ||
4514 | /* Store this current initializer, for the next enumerator variable | |
4515 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
4516 | use last_initializer below. */ | |
4517 | last_initializer = initializer; | |
4518 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
4519 | ||
4520 | /* Maintain enumerator history. */ | |
4521 | gfc_find_symbol (name, NULL, 0, &sym); | |
4522 | create_enum_history (sym, last_initializer); | |
4523 | ||
4524 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
4525 | ||
4526 | cleanup: | |
4527 | /* Free stuff up and return. */ | |
4528 | gfc_free_expr (initializer); | |
4529 | ||
4530 | return m; | |
4531 | } | |
4532 | ||
4533 | ||
25d8f0a2 TS |
4534 | /* Match the enumerator definition statement. */ |
4535 | ||
4536 | match | |
4537 | gfc_match_enumerator_def (void) | |
4538 | { | |
4539 | match m; | |
6133c68a | 4540 | try t; |
25d8f0a2 TS |
4541 | |
4542 | gfc_clear_ts (¤t_ts); | |
4543 | ||
4544 | m = gfc_match (" enumerator"); | |
4545 | if (m != MATCH_YES) | |
4546 | return m; | |
6133c68a TS |
4547 | |
4548 | m = gfc_match (" :: "); | |
4549 | if (m == MATCH_ERROR) | |
4550 | return m; | |
4551 | ||
4552 | colon_seen = (m == MATCH_YES); | |
25d8f0a2 TS |
4553 | |
4554 | if (gfc_current_state () != COMP_ENUM) | |
4555 | { | |
4556 | gfc_error ("ENUM definition statement expected before %C"); | |
4557 | gfc_free_enum_history (); | |
4558 | return MATCH_ERROR; | |
4559 | } | |
4560 | ||
4561 | (¤t_ts)->type = BT_INTEGER; | |
4562 | (¤t_ts)->kind = gfc_c_int_kind; | |
4563 | ||
6133c68a TS |
4564 | gfc_clear_attr (¤t_attr); |
4565 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
4566 | if (t == FAILURE) | |
25d8f0a2 | 4567 | { |
6133c68a | 4568 | m = MATCH_ERROR; |
25d8f0a2 TS |
4569 | goto cleanup; |
4570 | } | |
4571 | ||
25d8f0a2 TS |
4572 | for (;;) |
4573 | { | |
6133c68a | 4574 | m = enumerator_decl (); |
25d8f0a2 TS |
4575 | if (m == MATCH_ERROR) |
4576 | goto cleanup; | |
4577 | if (m == MATCH_NO) | |
4578 | break; | |
4579 | ||
4580 | if (gfc_match_eos () == MATCH_YES) | |
4581 | goto cleanup; | |
4582 | if (gfc_match_char (',') != MATCH_YES) | |
4583 | break; | |
4584 | } | |
4585 | ||
4586 | if (gfc_current_state () == COMP_ENUM) | |
4587 | { | |
4588 | gfc_free_enum_history (); | |
4589 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
4590 | m = MATCH_ERROR; | |
4591 | } | |
4592 | ||
4593 | cleanup: | |
4594 | gfc_free_array_spec (current_as); | |
4595 | current_as = NULL; | |
4596 | return m; | |
4597 | ||
4598 | } | |
4599 |