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1 | /* Declaration statement matcher | |
2 | Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010 | |
3 | Free Software Foundation, Inc. | |
4 | Contributed by Andy Vaught | |
5 | ||
6 | This file is part of GCC. | |
7 | ||
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 3, or (at your option) any later | |
11 | version. | |
12 | ||
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. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GCC; see the file COPYING3. If not see | |
20 | <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "config.h" | |
23 | #include "system.h" | |
24 | #include "gfortran.h" | |
25 | #include "match.h" | |
26 | #include "parse.h" | |
27 | #include "flags.h" | |
28 | #include "constructor.h" | |
29 | ||
30 | /* Macros to access allocate memory for gfc_data_variable, | |
31 | gfc_data_value and gfc_data. */ | |
32 | #define gfc_get_data_variable() XCNEW (gfc_data_variable) | |
33 | #define gfc_get_data_value() XCNEW (gfc_data_value) | |
34 | #define gfc_get_data() XCNEW (gfc_data) | |
35 | ||
36 | ||
37 | /* This flag is set if an old-style length selector is matched | |
38 | during a type-declaration statement. */ | |
39 | ||
40 | static int old_char_selector; | |
41 | ||
42 | /* When variables acquire types and attributes from a declaration | |
43 | statement, they get them from the following static variables. The | |
44 | first part of a declaration sets these variables and the second | |
45 | part copies these into symbol structures. */ | |
46 | ||
47 | static gfc_typespec current_ts; | |
48 | ||
49 | static symbol_attribute current_attr; | |
50 | static gfc_array_spec *current_as; | |
51 | static int colon_seen; | |
52 | ||
53 | /* The current binding label (if any). */ | |
54 | static char curr_binding_label[GFC_MAX_BINDING_LABEL_LEN + 1]; | |
55 | /* Need to know how many identifiers are on the current data declaration | |
56 | line in case we're given the BIND(C) attribute with a NAME= specifier. */ | |
57 | static int num_idents_on_line; | |
58 | /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we | |
59 | can supply a name if the curr_binding_label is nil and NAME= was not. */ | |
60 | static int has_name_equals = 0; | |
61 | ||
62 | /* Initializer of the previous enumerator. */ | |
63 | ||
64 | static gfc_expr *last_initializer; | |
65 | ||
66 | /* History of all the enumerators is maintained, so that | |
67 | kind values of all the enumerators could be updated depending | |
68 | upon the maximum initialized value. */ | |
69 | ||
70 | typedef struct enumerator_history | |
71 | { | |
72 | gfc_symbol *sym; | |
73 | gfc_expr *initializer; | |
74 | struct enumerator_history *next; | |
75 | } | |
76 | enumerator_history; | |
77 | ||
78 | /* Header of enum history chain. */ | |
79 | ||
80 | static enumerator_history *enum_history = NULL; | |
81 | ||
82 | /* Pointer of enum history node containing largest initializer. */ | |
83 | ||
84 | static enumerator_history *max_enum = NULL; | |
85 | ||
86 | /* gfc_new_block points to the symbol of a newly matched block. */ | |
87 | ||
88 | gfc_symbol *gfc_new_block; | |
89 | ||
90 | bool gfc_matching_function; | |
91 | ||
92 | ||
93 | /********************* DATA statement subroutines *********************/ | |
94 | ||
95 | static bool in_match_data = false; | |
96 | ||
97 | bool | |
98 | gfc_in_match_data (void) | |
99 | { | |
100 | return in_match_data; | |
101 | } | |
102 | ||
103 | static void | |
104 | set_in_match_data (bool set_value) | |
105 | { | |
106 | in_match_data = set_value; | |
107 | } | |
108 | ||
109 | /* Free a gfc_data_variable structure and everything beneath it. */ | |
110 | ||
111 | static void | |
112 | free_variable (gfc_data_variable *p) | |
113 | { | |
114 | gfc_data_variable *q; | |
115 | ||
116 | for (; p; p = q) | |
117 | { | |
118 | q = p->next; | |
119 | gfc_free_expr (p->expr); | |
120 | gfc_free_iterator (&p->iter, 0); | |
121 | free_variable (p->list); | |
122 | gfc_free (p); | |
123 | } | |
124 | } | |
125 | ||
126 | ||
127 | /* Free a gfc_data_value structure and everything beneath it. */ | |
128 | ||
129 | static void | |
130 | free_value (gfc_data_value *p) | |
131 | { | |
132 | gfc_data_value *q; | |
133 | ||
134 | for (; p; p = q) | |
135 | { | |
136 | q = p->next; | |
137 | gfc_free_expr (p->expr); | |
138 | gfc_free (p); | |
139 | } | |
140 | } | |
141 | ||
142 | ||
143 | /* Free a list of gfc_data structures. */ | |
144 | ||
145 | void | |
146 | gfc_free_data (gfc_data *p) | |
147 | { | |
148 | gfc_data *q; | |
149 | ||
150 | for (; p; p = q) | |
151 | { | |
152 | q = p->next; | |
153 | free_variable (p->var); | |
154 | free_value (p->value); | |
155 | gfc_free (p); | |
156 | } | |
157 | } | |
158 | ||
159 | ||
160 | /* Free all data in a namespace. */ | |
161 | ||
162 | static void | |
163 | gfc_free_data_all (gfc_namespace *ns) | |
164 | { | |
165 | gfc_data *d; | |
166 | ||
167 | for (;ns->data;) | |
168 | { | |
169 | d = ns->data->next; | |
170 | gfc_free (ns->data); | |
171 | ns->data = d; | |
172 | } | |
173 | } | |
174 | ||
175 | ||
176 | static match var_element (gfc_data_variable *); | |
177 | ||
178 | /* Match a list of variables terminated by an iterator and a right | |
179 | parenthesis. */ | |
180 | ||
181 | static match | |
182 | var_list (gfc_data_variable *parent) | |
183 | { | |
184 | gfc_data_variable *tail, var; | |
185 | match m; | |
186 | ||
187 | m = var_element (&var); | |
188 | if (m == MATCH_ERROR) | |
189 | return MATCH_ERROR; | |
190 | if (m == MATCH_NO) | |
191 | goto syntax; | |
192 | ||
193 | tail = gfc_get_data_variable (); | |
194 | *tail = var; | |
195 | ||
196 | parent->list = tail; | |
197 | ||
198 | for (;;) | |
199 | { | |
200 | if (gfc_match_char (',') != MATCH_YES) | |
201 | goto syntax; | |
202 | ||
203 | m = gfc_match_iterator (&parent->iter, 1); | |
204 | if (m == MATCH_YES) | |
205 | break; | |
206 | if (m == MATCH_ERROR) | |
207 | return MATCH_ERROR; | |
208 | ||
209 | m = var_element (&var); | |
210 | if (m == MATCH_ERROR) | |
211 | return MATCH_ERROR; | |
212 | if (m == MATCH_NO) | |
213 | goto syntax; | |
214 | ||
215 | tail->next = gfc_get_data_variable (); | |
216 | tail = tail->next; | |
217 | ||
218 | *tail = var; | |
219 | } | |
220 | ||
221 | if (gfc_match_char (')') != MATCH_YES) | |
222 | goto syntax; | |
223 | return MATCH_YES; | |
224 | ||
225 | syntax: | |
226 | gfc_syntax_error (ST_DATA); | |
227 | return MATCH_ERROR; | |
228 | } | |
229 | ||
230 | ||
231 | /* Match a single element in a data variable list, which can be a | |
232 | variable-iterator list. */ | |
233 | ||
234 | static match | |
235 | var_element (gfc_data_variable *new_var) | |
236 | { | |
237 | match m; | |
238 | gfc_symbol *sym; | |
239 | ||
240 | memset (new_var, 0, sizeof (gfc_data_variable)); | |
241 | ||
242 | if (gfc_match_char ('(') == MATCH_YES) | |
243 | return var_list (new_var); | |
244 | ||
245 | m = gfc_match_variable (&new_var->expr, 0); | |
246 | if (m != MATCH_YES) | |
247 | return m; | |
248 | ||
249 | sym = new_var->expr->symtree->n.sym; | |
250 | ||
251 | /* Symbol should already have an associated type. */ | |
252 | if (gfc_check_symbol_typed (sym, gfc_current_ns, | |
253 | false, gfc_current_locus) == FAILURE) | |
254 | return MATCH_ERROR; | |
255 | ||
256 | if (!sym->attr.function && gfc_current_ns->parent | |
257 | && gfc_current_ns->parent == sym->ns) | |
258 | { | |
259 | gfc_error ("Host associated variable '%s' may not be in the DATA " | |
260 | "statement at %C", sym->name); | |
261 | return MATCH_ERROR; | |
262 | } | |
263 | ||
264 | if (gfc_current_state () != COMP_BLOCK_DATA | |
265 | && sym->attr.in_common | |
266 | && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of " | |
267 | "common block variable '%s' in DATA statement at %C", | |
268 | sym->name) == FAILURE) | |
269 | return MATCH_ERROR; | |
270 | ||
271 | if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE) | |
272 | return MATCH_ERROR; | |
273 | ||
274 | return MATCH_YES; | |
275 | } | |
276 | ||
277 | ||
278 | /* Match the top-level list of data variables. */ | |
279 | ||
280 | static match | |
281 | top_var_list (gfc_data *d) | |
282 | { | |
283 | gfc_data_variable var, *tail, *new_var; | |
284 | match m; | |
285 | ||
286 | tail = NULL; | |
287 | ||
288 | for (;;) | |
289 | { | |
290 | m = var_element (&var); | |
291 | if (m == MATCH_NO) | |
292 | goto syntax; | |
293 | if (m == MATCH_ERROR) | |
294 | return MATCH_ERROR; | |
295 | ||
296 | new_var = gfc_get_data_variable (); | |
297 | *new_var = var; | |
298 | ||
299 | if (tail == NULL) | |
300 | d->var = new_var; | |
301 | else | |
302 | tail->next = new_var; | |
303 | ||
304 | tail = new_var; | |
305 | ||
306 | if (gfc_match_char ('/') == MATCH_YES) | |
307 | break; | |
308 | if (gfc_match_char (',') != MATCH_YES) | |
309 | goto syntax; | |
310 | } | |
311 | ||
312 | return MATCH_YES; | |
313 | ||
314 | syntax: | |
315 | gfc_syntax_error (ST_DATA); | |
316 | gfc_free_data_all (gfc_current_ns); | |
317 | return MATCH_ERROR; | |
318 | } | |
319 | ||
320 | ||
321 | static match | |
322 | match_data_constant (gfc_expr **result) | |
323 | { | |
324 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
325 | gfc_symbol *sym; | |
326 | gfc_expr *expr; | |
327 | match m; | |
328 | locus old_loc; | |
329 | ||
330 | m = gfc_match_literal_constant (&expr, 1); | |
331 | if (m == MATCH_YES) | |
332 | { | |
333 | *result = expr; | |
334 | return MATCH_YES; | |
335 | } | |
336 | ||
337 | if (m == MATCH_ERROR) | |
338 | return MATCH_ERROR; | |
339 | ||
340 | m = gfc_match_null (result); | |
341 | if (m != MATCH_NO) | |
342 | return m; | |
343 | ||
344 | old_loc = gfc_current_locus; | |
345 | ||
346 | /* Should this be a structure component, try to match it | |
347 | before matching a name. */ | |
348 | m = gfc_match_rvalue (result); | |
349 | if (m == MATCH_ERROR) | |
350 | return m; | |
351 | ||
352 | if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE) | |
353 | { | |
354 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
355 | m = MATCH_ERROR; | |
356 | return m; | |
357 | } | |
358 | ||
359 | gfc_current_locus = old_loc; | |
360 | ||
361 | m = gfc_match_name (name); | |
362 | if (m != MATCH_YES) | |
363 | return m; | |
364 | ||
365 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
366 | return MATCH_ERROR; | |
367 | ||
368 | if (sym == NULL | |
369 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
370 | { | |
371 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
372 | name); | |
373 | return MATCH_ERROR; | |
374 | } | |
375 | else if (sym->attr.flavor == FL_DERIVED) | |
376 | return gfc_match_structure_constructor (sym, result, false); | |
377 | ||
378 | /* Check to see if the value is an initialization array expression. */ | |
379 | if (sym->value->expr_type == EXPR_ARRAY) | |
380 | { | |
381 | gfc_current_locus = old_loc; | |
382 | ||
383 | m = gfc_match_init_expr (result); | |
384 | if (m == MATCH_ERROR) | |
385 | return m; | |
386 | ||
387 | if (m == MATCH_YES) | |
388 | { | |
389 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
390 | m = MATCH_ERROR; | |
391 | ||
392 | if ((*result)->expr_type == EXPR_CONSTANT) | |
393 | return m; | |
394 | else | |
395 | { | |
396 | gfc_error ("Invalid initializer %s in Data statement at %C", name); | |
397 | return MATCH_ERROR; | |
398 | } | |
399 | } | |
400 | } | |
401 | ||
402 | *result = gfc_copy_expr (sym->value); | |
403 | return MATCH_YES; | |
404 | } | |
405 | ||
406 | ||
407 | /* Match a list of values in a DATA statement. The leading '/' has | |
408 | already been seen at this point. */ | |
409 | ||
410 | static match | |
411 | top_val_list (gfc_data *data) | |
412 | { | |
413 | gfc_data_value *new_val, *tail; | |
414 | gfc_expr *expr; | |
415 | match m; | |
416 | ||
417 | tail = NULL; | |
418 | ||
419 | for (;;) | |
420 | { | |
421 | m = match_data_constant (&expr); | |
422 | if (m == MATCH_NO) | |
423 | goto syntax; | |
424 | if (m == MATCH_ERROR) | |
425 | return MATCH_ERROR; | |
426 | ||
427 | new_val = gfc_get_data_value (); | |
428 | mpz_init (new_val->repeat); | |
429 | ||
430 | if (tail == NULL) | |
431 | data->value = new_val; | |
432 | else | |
433 | tail->next = new_val; | |
434 | ||
435 | tail = new_val; | |
436 | ||
437 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
438 | { | |
439 | tail->expr = expr; | |
440 | mpz_set_ui (tail->repeat, 1); | |
441 | } | |
442 | else | |
443 | { | |
444 | if (expr->ts.type == BT_INTEGER) | |
445 | mpz_set (tail->repeat, expr->value.integer); | |
446 | gfc_free_expr (expr); | |
447 | ||
448 | m = match_data_constant (&tail->expr); | |
449 | if (m == MATCH_NO) | |
450 | goto syntax; | |
451 | if (m == MATCH_ERROR) | |
452 | return MATCH_ERROR; | |
453 | } | |
454 | ||
455 | if (gfc_match_char ('/') == MATCH_YES) | |
456 | break; | |
457 | if (gfc_match_char (',') == MATCH_NO) | |
458 | goto syntax; | |
459 | } | |
460 | ||
461 | return MATCH_YES; | |
462 | ||
463 | syntax: | |
464 | gfc_syntax_error (ST_DATA); | |
465 | gfc_free_data_all (gfc_current_ns); | |
466 | return MATCH_ERROR; | |
467 | } | |
468 | ||
469 | ||
470 | /* Matches an old style initialization. */ | |
471 | ||
472 | static match | |
473 | match_old_style_init (const char *name) | |
474 | { | |
475 | match m; | |
476 | gfc_symtree *st; | |
477 | gfc_symbol *sym; | |
478 | gfc_data *newdata; | |
479 | ||
480 | /* Set up data structure to hold initializers. */ | |
481 | gfc_find_sym_tree (name, NULL, 0, &st); | |
482 | sym = st->n.sym; | |
483 | ||
484 | newdata = gfc_get_data (); | |
485 | newdata->var = gfc_get_data_variable (); | |
486 | newdata->var->expr = gfc_get_variable_expr (st); | |
487 | newdata->where = gfc_current_locus; | |
488 | ||
489 | /* Match initial value list. This also eats the terminal '/'. */ | |
490 | m = top_val_list (newdata); | |
491 | if (m != MATCH_YES) | |
492 | { | |
493 | gfc_free (newdata); | |
494 | return m; | |
495 | } | |
496 | ||
497 | if (gfc_pure (NULL)) | |
498 | { | |
499 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
500 | gfc_free (newdata); | |
501 | return MATCH_ERROR; | |
502 | } | |
503 | ||
504 | /* Mark the variable as having appeared in a data statement. */ | |
505 | if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) | |
506 | { | |
507 | gfc_free (newdata); | |
508 | return MATCH_ERROR; | |
509 | } | |
510 | ||
511 | /* Chain in namespace list of DATA initializers. */ | |
512 | newdata->next = gfc_current_ns->data; | |
513 | gfc_current_ns->data = newdata; | |
514 | ||
515 | return m; | |
516 | } | |
517 | ||
518 | ||
519 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, | |
520 | we are matching a DATA statement and are therefore issuing an error | |
521 | if we encounter something unexpected, if not, we're trying to match | |
522 | an old-style initialization expression of the form INTEGER I /2/. */ | |
523 | ||
524 | match | |
525 | gfc_match_data (void) | |
526 | { | |
527 | gfc_data *new_data; | |
528 | match m; | |
529 | ||
530 | set_in_match_data (true); | |
531 | ||
532 | for (;;) | |
533 | { | |
534 | new_data = gfc_get_data (); | |
535 | new_data->where = gfc_current_locus; | |
536 | ||
537 | m = top_var_list (new_data); | |
538 | if (m != MATCH_YES) | |
539 | goto cleanup; | |
540 | ||
541 | m = top_val_list (new_data); | |
542 | if (m != MATCH_YES) | |
543 | goto cleanup; | |
544 | ||
545 | new_data->next = gfc_current_ns->data; | |
546 | gfc_current_ns->data = new_data; | |
547 | ||
548 | if (gfc_match_eos () == MATCH_YES) | |
549 | break; | |
550 | ||
551 | gfc_match_char (','); /* Optional comma */ | |
552 | } | |
553 | ||
554 | set_in_match_data (false); | |
555 | ||
556 | if (gfc_pure (NULL)) | |
557 | { | |
558 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
559 | return MATCH_ERROR; | |
560 | } | |
561 | ||
562 | return MATCH_YES; | |
563 | ||
564 | cleanup: | |
565 | set_in_match_data (false); | |
566 | gfc_free_data (new_data); | |
567 | return MATCH_ERROR; | |
568 | } | |
569 | ||
570 | ||
571 | /************************ Declaration statements *********************/ | |
572 | ||
573 | ||
574 | /* Auxilliary function to merge DIMENSION and CODIMENSION array specs. */ | |
575 | ||
576 | static void | |
577 | merge_array_spec (gfc_array_spec *from, gfc_array_spec *to, bool copy) | |
578 | { | |
579 | int i; | |
580 | ||
581 | if (to->rank == 0 && from->rank > 0) | |
582 | { | |
583 | to->rank = from->rank; | |
584 | to->type = from->type; | |
585 | to->cray_pointee = from->cray_pointee; | |
586 | to->cp_was_assumed = from->cp_was_assumed; | |
587 | ||
588 | for (i = 0; i < to->corank; i++) | |
589 | { | |
590 | to->lower[from->rank + i] = to->lower[i]; | |
591 | to->upper[from->rank + i] = to->upper[i]; | |
592 | } | |
593 | for (i = 0; i < from->rank; i++) | |
594 | { | |
595 | if (copy) | |
596 | { | |
597 | to->lower[i] = gfc_copy_expr (from->lower[i]); | |
598 | to->upper[i] = gfc_copy_expr (from->upper[i]); | |
599 | } | |
600 | else | |
601 | { | |
602 | to->lower[i] = from->lower[i]; | |
603 | to->upper[i] = from->upper[i]; | |
604 | } | |
605 | } | |
606 | } | |
607 | else if (to->corank == 0 && from->corank > 0) | |
608 | { | |
609 | to->corank = from->corank; | |
610 | to->cotype = from->cotype; | |
611 | ||
612 | for (i = 0; i < from->corank; i++) | |
613 | { | |
614 | if (copy) | |
615 | { | |
616 | to->lower[to->rank + i] = gfc_copy_expr (from->lower[i]); | |
617 | to->upper[to->rank + i] = gfc_copy_expr (from->upper[i]); | |
618 | } | |
619 | else | |
620 | { | |
621 | to->lower[to->rank + i] = from->lower[i]; | |
622 | to->upper[to->rank + i] = from->upper[i]; | |
623 | } | |
624 | } | |
625 | } | |
626 | } | |
627 | ||
628 | ||
629 | /* Match an intent specification. Since this can only happen after an | |
630 | INTENT word, a legal intent-spec must follow. */ | |
631 | ||
632 | static sym_intent | |
633 | match_intent_spec (void) | |
634 | { | |
635 | ||
636 | if (gfc_match (" ( in out )") == MATCH_YES) | |
637 | return INTENT_INOUT; | |
638 | if (gfc_match (" ( in )") == MATCH_YES) | |
639 | return INTENT_IN; | |
640 | if (gfc_match (" ( out )") == MATCH_YES) | |
641 | return INTENT_OUT; | |
642 | ||
643 | gfc_error ("Bad INTENT specification at %C"); | |
644 | return INTENT_UNKNOWN; | |
645 | } | |
646 | ||
647 | ||
648 | /* Matches a character length specification, which is either a | |
649 | specification expression or a '*'. */ | |
650 | ||
651 | static match | |
652 | char_len_param_value (gfc_expr **expr) | |
653 | { | |
654 | match m; | |
655 | ||
656 | if (gfc_match_char ('*') == MATCH_YES) | |
657 | { | |
658 | *expr = NULL; | |
659 | return MATCH_YES; | |
660 | } | |
661 | ||
662 | m = gfc_match_expr (expr); | |
663 | ||
664 | if (m == MATCH_YES | |
665 | && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE) | |
666 | return MATCH_ERROR; | |
667 | ||
668 | if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION) | |
669 | { | |
670 | if ((*expr)->value.function.actual | |
671 | && (*expr)->value.function.actual->expr->symtree) | |
672 | { | |
673 | gfc_expr *e; | |
674 | e = (*expr)->value.function.actual->expr; | |
675 | if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE | |
676 | && e->expr_type == EXPR_VARIABLE) | |
677 | { | |
678 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) | |
679 | goto syntax; | |
680 | if (e->symtree->n.sym->ts.type == BT_CHARACTER | |
681 | && e->symtree->n.sym->ts.u.cl | |
682 | && e->symtree->n.sym->ts.u.cl->length->ts.type == BT_UNKNOWN) | |
683 | goto syntax; | |
684 | } | |
685 | } | |
686 | } | |
687 | return m; | |
688 | ||
689 | syntax: | |
690 | gfc_error ("Conflict in attributes of function argument at %C"); | |
691 | return MATCH_ERROR; | |
692 | } | |
693 | ||
694 | ||
695 | /* A character length is a '*' followed by a literal integer or a | |
696 | char_len_param_value in parenthesis. */ | |
697 | ||
698 | static match | |
699 | match_char_length (gfc_expr **expr) | |
700 | { | |
701 | int length; | |
702 | match m; | |
703 | ||
704 | m = gfc_match_char ('*'); | |
705 | if (m != MATCH_YES) | |
706 | return m; | |
707 | ||
708 | m = gfc_match_small_literal_int (&length, NULL); | |
709 | if (m == MATCH_ERROR) | |
710 | return m; | |
711 | ||
712 | if (m == MATCH_YES) | |
713 | { | |
714 | if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: " | |
715 | "Old-style character length at %C") == FAILURE) | |
716 | return MATCH_ERROR; | |
717 | *expr = gfc_get_int_expr (gfc_default_integer_kind, NULL, length); | |
718 | return m; | |
719 | } | |
720 | ||
721 | if (gfc_match_char ('(') == MATCH_NO) | |
722 | goto syntax; | |
723 | ||
724 | m = char_len_param_value (expr); | |
725 | if (m != MATCH_YES && gfc_matching_function) | |
726 | { | |
727 | gfc_undo_symbols (); | |
728 | m = MATCH_YES; | |
729 | } | |
730 | ||
731 | if (m == MATCH_ERROR) | |
732 | return m; | |
733 | if (m == MATCH_NO) | |
734 | goto syntax; | |
735 | ||
736 | if (gfc_match_char (')') == MATCH_NO) | |
737 | { | |
738 | gfc_free_expr (*expr); | |
739 | *expr = NULL; | |
740 | goto syntax; | |
741 | } | |
742 | ||
743 | return MATCH_YES; | |
744 | ||
745 | syntax: | |
746 | gfc_error ("Syntax error in character length specification at %C"); | |
747 | return MATCH_ERROR; | |
748 | } | |
749 | ||
750 | ||
751 | /* Special subroutine for finding a symbol. Check if the name is found | |
752 | in the current name space. If not, and we're compiling a function or | |
753 | subroutine and the parent compilation unit is an interface, then check | |
754 | to see if the name we've been given is the name of the interface | |
755 | (located in another namespace). */ | |
756 | ||
757 | static int | |
758 | find_special (const char *name, gfc_symbol **result, bool allow_subroutine) | |
759 | { | |
760 | gfc_state_data *s; | |
761 | gfc_symtree *st; | |
762 | int i; | |
763 | ||
764 | i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine); | |
765 | if (i == 0) | |
766 | { | |
767 | *result = st ? st->n.sym : NULL; | |
768 | goto end; | |
769 | } | |
770 | ||
771 | if (gfc_current_state () != COMP_SUBROUTINE | |
772 | && gfc_current_state () != COMP_FUNCTION) | |
773 | goto end; | |
774 | ||
775 | s = gfc_state_stack->previous; | |
776 | if (s == NULL) | |
777 | goto end; | |
778 | ||
779 | if (s->state != COMP_INTERFACE) | |
780 | goto end; | |
781 | if (s->sym == NULL) | |
782 | goto end; /* Nameless interface. */ | |
783 | ||
784 | if (strcmp (name, s->sym->name) == 0) | |
785 | { | |
786 | *result = s->sym; | |
787 | return 0; | |
788 | } | |
789 | ||
790 | end: | |
791 | return i; | |
792 | } | |
793 | ||
794 | ||
795 | /* Special subroutine for getting a symbol node associated with a | |
796 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
797 | symbol is created in the parent using with symtree node in the | |
798 | child unit pointing to the symbol. If the current namespace has no | |
799 | parent, then the symbol is just created in the current unit. */ | |
800 | ||
801 | static int | |
802 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) | |
803 | { | |
804 | gfc_symtree *st; | |
805 | gfc_symbol *sym; | |
806 | int rc = 0; | |
807 | ||
808 | /* Module functions have to be left in their own namespace because | |
809 | they have potentially (almost certainly!) already been referenced. | |
810 | In this sense, they are rather like external functions. This is | |
811 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
812 | space is set to point to the master function, so that the fake | |
813 | result mechanism can work. */ | |
814 | if (module_fcn_entry) | |
815 | { | |
816 | /* Present if entry is declared to be a module procedure. */ | |
817 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); | |
818 | ||
819 | if (*result == NULL) | |
820 | rc = gfc_get_symbol (name, NULL, result); | |
821 | else if (!gfc_get_symbol (name, NULL, &sym) && sym | |
822 | && (*result)->ts.type == BT_UNKNOWN | |
823 | && sym->attr.flavor == FL_UNKNOWN) | |
824 | /* Pick up the typespec for the entry, if declared in the function | |
825 | body. Note that this symbol is FL_UNKNOWN because it will | |
826 | only have appeared in a type declaration. The local symtree | |
827 | is set to point to the module symbol and a unique symtree | |
828 | to the local version. This latter ensures a correct clearing | |
829 | of the symbols. */ | |
830 | { | |
831 | /* If the ENTRY proceeds its specification, we need to ensure | |
832 | that this does not raise a "has no IMPLICIT type" error. */ | |
833 | if (sym->ts.type == BT_UNKNOWN) | |
834 | sym->attr.untyped = 1; | |
835 | ||
836 | (*result)->ts = sym->ts; | |
837 | ||
838 | /* Put the symbol in the procedure namespace so that, should | |
839 | the ENTRY precede its specification, the specification | |
840 | can be applied. */ | |
841 | (*result)->ns = gfc_current_ns; | |
842 | ||
843 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); | |
844 | st->n.sym = *result; | |
845 | st = gfc_get_unique_symtree (gfc_current_ns); | |
846 | st->n.sym = sym; | |
847 | } | |
848 | } | |
849 | else | |
850 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
851 | ||
852 | if (rc) | |
853 | return rc; | |
854 | ||
855 | sym = *result; | |
856 | gfc_current_ns->refs++; | |
857 | ||
858 | if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE) | |
859 | { | |
860 | /* Trap another encompassed procedure with the same name. All | |
861 | these conditions are necessary to avoid picking up an entry | |
862 | whose name clashes with that of the encompassing procedure; | |
863 | this is handled using gsymbols to register unique,globally | |
864 | accessible names. */ | |
865 | if (sym->attr.flavor != 0 | |
866 | && sym->attr.proc != 0 | |
867 | && (sym->attr.subroutine || sym->attr.function) | |
868 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
869 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", | |
870 | name, &sym->declared_at); | |
871 | ||
872 | /* Trap a procedure with a name the same as interface in the | |
873 | encompassing scope. */ | |
874 | if (sym->attr.generic != 0 | |
875 | && (sym->attr.subroutine || sym->attr.function) | |
876 | && !sym->attr.mod_proc) | |
877 | gfc_error_now ("Name '%s' at %C is already defined" | |
878 | " as a generic interface at %L", | |
879 | name, &sym->declared_at); | |
880 | ||
881 | /* Trap declarations of attributes in encompassing scope. The | |
882 | signature for this is that ts.kind is set. Legitimate | |
883 | references only set ts.type. */ | |
884 | if (sym->ts.kind != 0 | |
885 | && !sym->attr.implicit_type | |
886 | && sym->attr.proc == 0 | |
887 | && gfc_current_ns->parent != NULL | |
888 | && sym->attr.access == 0 | |
889 | && !module_fcn_entry) | |
890 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
891 | "and must not have attributes declared at %L", | |
892 | name, &sym->declared_at); | |
893 | } | |
894 | ||
895 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
896 | return rc; | |
897 | ||
898 | /* Module function entries will already have a symtree in | |
899 | the current namespace but will need one at module level. */ | |
900 | if (module_fcn_entry) | |
901 | { | |
902 | /* Present if entry is declared to be a module procedure. */ | |
903 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); | |
904 | if (st == NULL) | |
905 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
906 | } | |
907 | else | |
908 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
909 | ||
910 | st->n.sym = sym; | |
911 | sym->refs++; | |
912 | ||
913 | /* See if the procedure should be a module procedure. */ | |
914 | ||
915 | if (((sym->ns->proc_name != NULL | |
916 | && sym->ns->proc_name->attr.flavor == FL_MODULE | |
917 | && sym->attr.proc != PROC_MODULE) | |
918 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) | |
919 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
920 | sym->name, NULL) == FAILURE) | |
921 | rc = 2; | |
922 | ||
923 | return rc; | |
924 | } | |
925 | ||
926 | ||
927 | /* Verify that the given symbol representing a parameter is C | |
928 | interoperable, by checking to see if it was marked as such after | |
929 | its declaration. If the given symbol is not interoperable, a | |
930 | warning is reported, thus removing the need to return the status to | |
931 | the calling function. The standard does not require the user use | |
932 | one of the iso_c_binding named constants to declare an | |
933 | interoperable parameter, but we can't be sure if the param is C | |
934 | interop or not if the user doesn't. For example, integer(4) may be | |
935 | legal Fortran, but doesn't have meaning in C. It may interop with | |
936 | a number of the C types, which causes a problem because the | |
937 | compiler can't know which one. This code is almost certainly not | |
938 | portable, and the user will get what they deserve if the C type | |
939 | across platforms isn't always interoperable with integer(4). If | |
940 | the user had used something like integer(c_int) or integer(c_long), | |
941 | the compiler could have automatically handled the varying sizes | |
942 | across platforms. */ | |
943 | ||
944 | gfc_try | |
945 | verify_c_interop_param (gfc_symbol *sym) | |
946 | { | |
947 | int is_c_interop = 0; | |
948 | gfc_try retval = SUCCESS; | |
949 | ||
950 | /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). | |
951 | Don't repeat the checks here. */ | |
952 | if (sym->attr.implicit_type) | |
953 | return SUCCESS; | |
954 | ||
955 | /* For subroutines or functions that are passed to a BIND(C) procedure, | |
956 | they're interoperable if they're BIND(C) and their params are all | |
957 | interoperable. */ | |
958 | if (sym->attr.flavor == FL_PROCEDURE) | |
959 | { | |
960 | if (sym->attr.is_bind_c == 0) | |
961 | { | |
962 | gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " | |
963 | "attribute to be C interoperable", sym->name, | |
964 | &(sym->declared_at)); | |
965 | ||
966 | return FAILURE; | |
967 | } | |
968 | else | |
969 | { | |
970 | if (sym->attr.is_c_interop == 1) | |
971 | /* We've already checked this procedure; don't check it again. */ | |
972 | return SUCCESS; | |
973 | else | |
974 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, | |
975 | sym->common_block); | |
976 | } | |
977 | } | |
978 | ||
979 | /* See if we've stored a reference to a procedure that owns sym. */ | |
980 | if (sym->ns != NULL && sym->ns->proc_name != NULL) | |
981 | { | |
982 | if (sym->ns->proc_name->attr.is_bind_c == 1) | |
983 | { | |
984 | is_c_interop = | |
985 | (verify_c_interop (&(sym->ts)) | |
986 | == SUCCESS ? 1 : 0); | |
987 | ||
988 | if (is_c_interop != 1) | |
989 | { | |
990 | /* Make personalized messages to give better feedback. */ | |
991 | if (sym->ts.type == BT_DERIVED) | |
992 | gfc_error ("Type '%s' at %L is a parameter to the BIND(C) " | |
993 | " procedure '%s' but is not C interoperable " | |
994 | "because derived type '%s' is not C interoperable", | |
995 | sym->name, &(sym->declared_at), | |
996 | sym->ns->proc_name->name, | |
997 | sym->ts.u.derived->name); | |
998 | else | |
999 | gfc_warning ("Variable '%s' at %L is a parameter to the " | |
1000 | "BIND(C) procedure '%s' but may not be C " | |
1001 | "interoperable", | |
1002 | sym->name, &(sym->declared_at), | |
1003 | sym->ns->proc_name->name); | |
1004 | } | |
1005 | ||
1006 | /* Character strings are only C interoperable if they have a | |
1007 | length of 1. */ | |
1008 | if (sym->ts.type == BT_CHARACTER) | |
1009 | { | |
1010 | gfc_charlen *cl = sym->ts.u.cl; | |
1011 | if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT | |
1012 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) | |
1013 | { | |
1014 | gfc_error ("Character argument '%s' at %L " | |
1015 | "must be length 1 because " | |
1016 | "procedure '%s' is BIND(C)", | |
1017 | sym->name, &sym->declared_at, | |
1018 | sym->ns->proc_name->name); | |
1019 | retval = FAILURE; | |
1020 | } | |
1021 | } | |
1022 | ||
1023 | /* We have to make sure that any param to a bind(c) routine does | |
1024 | not have the allocatable, pointer, or optional attributes, | |
1025 | according to J3/04-007, section 5.1. */ | |
1026 | if (sym->attr.allocatable == 1) | |
1027 | { | |
1028 | gfc_error ("Variable '%s' at %L cannot have the " | |
1029 | "ALLOCATABLE attribute because procedure '%s'" | |
1030 | " is BIND(C)", sym->name, &(sym->declared_at), | |
1031 | sym->ns->proc_name->name); | |
1032 | retval = FAILURE; | |
1033 | } | |
1034 | ||
1035 | if (sym->attr.pointer == 1) | |
1036 | { | |
1037 | gfc_error ("Variable '%s' at %L cannot have the " | |
1038 | "POINTER attribute because procedure '%s'" | |
1039 | " is BIND(C)", sym->name, &(sym->declared_at), | |
1040 | sym->ns->proc_name->name); | |
1041 | retval = FAILURE; | |
1042 | } | |
1043 | ||
1044 | if (sym->attr.optional == 1) | |
1045 | { | |
1046 | gfc_error ("Variable '%s' at %L cannot have the " | |
1047 | "OPTIONAL attribute because procedure '%s'" | |
1048 | " is BIND(C)", sym->name, &(sym->declared_at), | |
1049 | sym->ns->proc_name->name); | |
1050 | retval = FAILURE; | |
1051 | } | |
1052 | ||
1053 | /* Make sure that if it has the dimension attribute, that it is | |
1054 | either assumed size or explicit shape. */ | |
1055 | if (sym->as != NULL) | |
1056 | { | |
1057 | if (sym->as->type == AS_ASSUMED_SHAPE) | |
1058 | { | |
1059 | gfc_error ("Assumed-shape array '%s' at %L cannot be an " | |
1060 | "argument to the procedure '%s' at %L because " | |
1061 | "the procedure is BIND(C)", sym->name, | |
1062 | &(sym->declared_at), sym->ns->proc_name->name, | |
1063 | &(sym->ns->proc_name->declared_at)); | |
1064 | retval = FAILURE; | |
1065 | } | |
1066 | ||
1067 | if (sym->as->type == AS_DEFERRED) | |
1068 | { | |
1069 | gfc_error ("Deferred-shape array '%s' at %L cannot be an " | |
1070 | "argument to the procedure '%s' at %L because " | |
1071 | "the procedure is BIND(C)", sym->name, | |
1072 | &(sym->declared_at), sym->ns->proc_name->name, | |
1073 | &(sym->ns->proc_name->declared_at)); | |
1074 | retval = FAILURE; | |
1075 | } | |
1076 | } | |
1077 | } | |
1078 | } | |
1079 | ||
1080 | return retval; | |
1081 | } | |
1082 | ||
1083 | ||
1084 | ||
1085 | /* Function called by variable_decl() that adds a name to the symbol table. */ | |
1086 | ||
1087 | static gfc_try | |
1088 | build_sym (const char *name, gfc_charlen *cl, | |
1089 | gfc_array_spec **as, locus *var_locus) | |
1090 | { | |
1091 | symbol_attribute attr; | |
1092 | gfc_symbol *sym; | |
1093 | ||
1094 | if (gfc_get_symbol (name, NULL, &sym)) | |
1095 | return FAILURE; | |
1096 | ||
1097 | /* Start updating the symbol table. Add basic type attribute if present. */ | |
1098 | if (current_ts.type != BT_UNKNOWN | |
1099 | && (sym->attr.implicit_type == 0 | |
1100 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
1101 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) | |
1102 | return FAILURE; | |
1103 | ||
1104 | if (sym->ts.type == BT_CHARACTER) | |
1105 | sym->ts.u.cl = cl; | |
1106 | ||
1107 | /* Add dimension attribute if present. */ | |
1108 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
1109 | return FAILURE; | |
1110 | *as = NULL; | |
1111 | ||
1112 | /* Add attribute to symbol. The copy is so that we can reset the | |
1113 | dimension attribute. */ | |
1114 | attr = current_attr; | |
1115 | attr.dimension = 0; | |
1116 | attr.codimension = 0; | |
1117 | ||
1118 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
1119 | return FAILURE; | |
1120 | ||
1121 | /* Finish any work that may need to be done for the binding label, | |
1122 | if it's a bind(c). The bind(c) attr is found before the symbol | |
1123 | is made, and before the symbol name (for data decls), so the | |
1124 | current_ts is holding the binding label, or nothing if the | |
1125 | name= attr wasn't given. Therefore, test here if we're dealing | |
1126 | with a bind(c) and make sure the binding label is set correctly. */ | |
1127 | if (sym->attr.is_bind_c == 1) | |
1128 | { | |
1129 | if (sym->binding_label[0] == '\0') | |
1130 | { | |
1131 | /* Set the binding label and verify that if a NAME= was specified | |
1132 | then only one identifier was in the entity-decl-list. */ | |
1133 | if (set_binding_label (sym->binding_label, sym->name, | |
1134 | num_idents_on_line) == FAILURE) | |
1135 | return FAILURE; | |
1136 | } | |
1137 | } | |
1138 | ||
1139 | /* See if we know we're in a common block, and if it's a bind(c) | |
1140 | common then we need to make sure we're an interoperable type. */ | |
1141 | if (sym->attr.in_common == 1) | |
1142 | { | |
1143 | /* Test the common block object. */ | |
1144 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 | |
1145 | && sym->ts.is_c_interop != 1) | |
1146 | { | |
1147 | gfc_error_now ("Variable '%s' in common block '%s' at %C " | |
1148 | "must be declared with a C interoperable " | |
1149 | "kind since common block '%s' is BIND(C)", | |
1150 | sym->name, sym->common_block->name, | |
1151 | sym->common_block->name); | |
1152 | gfc_clear_error (); | |
1153 | } | |
1154 | } | |
1155 | ||
1156 | sym->attr.implied_index = 0; | |
1157 | ||
1158 | if (sym->ts.type == BT_CLASS) | |
1159 | { | |
1160 | sym->attr.class_ok = (sym->attr.dummy | |
1161 | || sym->attr.pointer | |
1162 | || sym->attr.allocatable) ? 1 : 0; | |
1163 | gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as, false); | |
1164 | } | |
1165 | ||
1166 | return SUCCESS; | |
1167 | } | |
1168 | ||
1169 | ||
1170 | /* Set character constant to the given length. The constant will be padded or | |
1171 | truncated. If we're inside an array constructor without a typespec, we | |
1172 | additionally check that all elements have the same length; check_len -1 | |
1173 | means no checking. */ | |
1174 | ||
1175 | void | |
1176 | gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len) | |
1177 | { | |
1178 | gfc_char_t *s; | |
1179 | int slen; | |
1180 | ||
1181 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
1182 | gcc_assert (expr->ts.type == BT_CHARACTER); | |
1183 | ||
1184 | slen = expr->value.character.length; | |
1185 | if (len != slen) | |
1186 | { | |
1187 | s = gfc_get_wide_string (len + 1); | |
1188 | memcpy (s, expr->value.character.string, | |
1189 | MIN (len, slen) * sizeof (gfc_char_t)); | |
1190 | if (len > slen) | |
1191 | gfc_wide_memset (&s[slen], ' ', len - slen); | |
1192 | ||
1193 | if (gfc_option.warn_character_truncation && slen > len) | |
1194 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
1195 | "(%d/%d)", &expr->where, slen, len); | |
1196 | ||
1197 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
1198 | initializers. */ | |
1199 | if (check_len != -1 && slen != check_len | |
1200 | && !(gfc_option.allow_std & GFC_STD_GNU)) | |
1201 | gfc_error_now ("The CHARACTER elements of the array constructor " | |
1202 | "at %L must have the same length (%d/%d)", | |
1203 | &expr->where, slen, check_len); | |
1204 | ||
1205 | s[len] = '\0'; | |
1206 | gfc_free (expr->value.character.string); | |
1207 | expr->value.character.string = s; | |
1208 | expr->value.character.length = len; | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | ||
1213 | /* Function to create and update the enumerator history | |
1214 | using the information passed as arguments. | |
1215 | Pointer "max_enum" is also updated, to point to | |
1216 | enum history node containing largest initializer. | |
1217 | ||
1218 | SYM points to the symbol node of enumerator. | |
1219 | INIT points to its enumerator value. */ | |
1220 | ||
1221 | static void | |
1222 | create_enum_history (gfc_symbol *sym, gfc_expr *init) | |
1223 | { | |
1224 | enumerator_history *new_enum_history; | |
1225 | gcc_assert (sym != NULL && init != NULL); | |
1226 | ||
1227 | new_enum_history = XCNEW (enumerator_history); | |
1228 | ||
1229 | new_enum_history->sym = sym; | |
1230 | new_enum_history->initializer = init; | |
1231 | new_enum_history->next = NULL; | |
1232 | ||
1233 | if (enum_history == NULL) | |
1234 | { | |
1235 | enum_history = new_enum_history; | |
1236 | max_enum = enum_history; | |
1237 | } | |
1238 | else | |
1239 | { | |
1240 | new_enum_history->next = enum_history; | |
1241 | enum_history = new_enum_history; | |
1242 | ||
1243 | if (mpz_cmp (max_enum->initializer->value.integer, | |
1244 | new_enum_history->initializer->value.integer) < 0) | |
1245 | max_enum = new_enum_history; | |
1246 | } | |
1247 | } | |
1248 | ||
1249 | ||
1250 | /* Function to free enum kind history. */ | |
1251 | ||
1252 | void | |
1253 | gfc_free_enum_history (void) | |
1254 | { | |
1255 | enumerator_history *current = enum_history; | |
1256 | enumerator_history *next; | |
1257 | ||
1258 | while (current != NULL) | |
1259 | { | |
1260 | next = current->next; | |
1261 | gfc_free (current); | |
1262 | current = next; | |
1263 | } | |
1264 | max_enum = NULL; | |
1265 | enum_history = NULL; | |
1266 | } | |
1267 | ||
1268 | ||
1269 | /* Function called by variable_decl() that adds an initialization | |
1270 | expression to a symbol. */ | |
1271 | ||
1272 | static gfc_try | |
1273 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) | |
1274 | { | |
1275 | symbol_attribute attr; | |
1276 | gfc_symbol *sym; | |
1277 | gfc_expr *init; | |
1278 | ||
1279 | init = *initp; | |
1280 | if (find_special (name, &sym, false)) | |
1281 | return FAILURE; | |
1282 | ||
1283 | attr = sym->attr; | |
1284 | ||
1285 | /* If this symbol is confirming an implicit parameter type, | |
1286 | then an initialization expression is not allowed. */ | |
1287 | if (attr.flavor == FL_PARAMETER | |
1288 | && sym->value != NULL | |
1289 | && *initp != NULL) | |
1290 | { | |
1291 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
1292 | sym->name); | |
1293 | return FAILURE; | |
1294 | } | |
1295 | ||
1296 | if (init == NULL) | |
1297 | { | |
1298 | /* An initializer is required for PARAMETER declarations. */ | |
1299 | if (attr.flavor == FL_PARAMETER) | |
1300 | { | |
1301 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
1302 | return FAILURE; | |
1303 | } | |
1304 | } | |
1305 | else | |
1306 | { | |
1307 | /* If a variable appears in a DATA block, it cannot have an | |
1308 | initializer. */ | |
1309 | if (sym->attr.data) | |
1310 | { | |
1311 | gfc_error ("Variable '%s' at %C with an initializer already " | |
1312 | "appears in a DATA statement", sym->name); | |
1313 | return FAILURE; | |
1314 | } | |
1315 | ||
1316 | /* Check if the assignment can happen. This has to be put off | |
1317 | until later for a derived type variable. */ | |
1318 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED | |
1319 | && sym->ts.type != BT_CLASS && init->ts.type != BT_CLASS | |
1320 | && gfc_check_assign_symbol (sym, init) == FAILURE) | |
1321 | return FAILURE; | |
1322 | ||
1323 | if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl | |
1324 | && init->ts.type == BT_CHARACTER) | |
1325 | { | |
1326 | /* Update symbol character length according initializer. */ | |
1327 | if (gfc_check_assign_symbol (sym, init) == FAILURE) | |
1328 | return FAILURE; | |
1329 | ||
1330 | if (sym->ts.u.cl->length == NULL) | |
1331 | { | |
1332 | int clen; | |
1333 | /* If there are multiple CHARACTER variables declared on the | |
1334 | same line, we don't want them to share the same length. */ | |
1335 | sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); | |
1336 | ||
1337 | if (sym->attr.flavor == FL_PARAMETER) | |
1338 | { | |
1339 | if (init->expr_type == EXPR_CONSTANT) | |
1340 | { | |
1341 | clen = init->value.character.length; | |
1342 | sym->ts.u.cl->length | |
1343 | = gfc_get_int_expr (gfc_default_integer_kind, | |
1344 | NULL, clen); | |
1345 | } | |
1346 | else if (init->expr_type == EXPR_ARRAY) | |
1347 | { | |
1348 | gfc_constructor *c; | |
1349 | c = gfc_constructor_first (init->value.constructor); | |
1350 | clen = c->expr->value.character.length; | |
1351 | sym->ts.u.cl->length | |
1352 | = gfc_get_int_expr (gfc_default_integer_kind, | |
1353 | NULL, clen); | |
1354 | } | |
1355 | else if (init->ts.u.cl && init->ts.u.cl->length) | |
1356 | sym->ts.u.cl->length = | |
1357 | gfc_copy_expr (sym->value->ts.u.cl->length); | |
1358 | } | |
1359 | } | |
1360 | /* Update initializer character length according symbol. */ | |
1361 | else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT) | |
1362 | { | |
1363 | int len = mpz_get_si (sym->ts.u.cl->length->value.integer); | |
1364 | ||
1365 | if (init->expr_type == EXPR_CONSTANT) | |
1366 | gfc_set_constant_character_len (len, init, -1); | |
1367 | else if (init->expr_type == EXPR_ARRAY) | |
1368 | { | |
1369 | gfc_constructor *c; | |
1370 | ||
1371 | /* Build a new charlen to prevent simplification from | |
1372 | deleting the length before it is resolved. */ | |
1373 | init->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); | |
1374 | init->ts.u.cl->length = gfc_copy_expr (sym->ts.u.cl->length); | |
1375 | ||
1376 | for (c = gfc_constructor_first (init->value.constructor); | |
1377 | c; c = gfc_constructor_next (c)) | |
1378 | gfc_set_constant_character_len (len, c->expr, -1); | |
1379 | } | |
1380 | } | |
1381 | } | |
1382 | ||
1383 | /* Need to check if the expression we initialized this | |
1384 | to was one of the iso_c_binding named constants. If so, | |
1385 | and we're a parameter (constant), let it be iso_c. | |
1386 | For example: | |
1387 | integer(c_int), parameter :: my_int = c_int | |
1388 | integer(my_int) :: my_int_2 | |
1389 | If we mark my_int as iso_c (since we can see it's value | |
1390 | is equal to one of the named constants), then my_int_2 | |
1391 | will be considered C interoperable. */ | |
1392 | if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) | |
1393 | { | |
1394 | sym->ts.is_iso_c |= init->ts.is_iso_c; | |
1395 | sym->ts.is_c_interop |= init->ts.is_c_interop; | |
1396 | /* attr bits needed for module files. */ | |
1397 | sym->attr.is_iso_c |= init->ts.is_iso_c; | |
1398 | sym->attr.is_c_interop |= init->ts.is_c_interop; | |
1399 | if (init->ts.is_iso_c) | |
1400 | sym->ts.f90_type = init->ts.f90_type; | |
1401 | } | |
1402 | ||
1403 | /* Add initializer. Make sure we keep the ranks sane. */ | |
1404 | if (sym->attr.dimension && init->rank == 0) | |
1405 | { | |
1406 | mpz_t size; | |
1407 | gfc_expr *array; | |
1408 | int n; | |
1409 | if (sym->attr.flavor == FL_PARAMETER | |
1410 | && init->expr_type == EXPR_CONSTANT | |
1411 | && spec_size (sym->as, &size) == SUCCESS | |
1412 | && mpz_cmp_si (size, 0) > 0) | |
1413 | { | |
1414 | array = gfc_get_array_expr (init->ts.type, init->ts.kind, | |
1415 | &init->where); | |
1416 | for (n = 0; n < (int)mpz_get_si (size); n++) | |
1417 | gfc_constructor_append_expr (&array->value.constructor, | |
1418 | n == 0 | |
1419 | ? init | |
1420 | : gfc_copy_expr (init), | |
1421 | &init->where); | |
1422 | ||
1423 | array->shape = gfc_get_shape (sym->as->rank); | |
1424 | for (n = 0; n < sym->as->rank; n++) | |
1425 | spec_dimen_size (sym->as, n, &array->shape[n]); | |
1426 | ||
1427 | init = array; | |
1428 | mpz_clear (size); | |
1429 | } | |
1430 | init->rank = sym->as->rank; | |
1431 | } | |
1432 | ||
1433 | sym->value = init; | |
1434 | if (sym->attr.save == SAVE_NONE) | |
1435 | sym->attr.save = SAVE_IMPLICIT; | |
1436 | *initp = NULL; | |
1437 | } | |
1438 | ||
1439 | return SUCCESS; | |
1440 | } | |
1441 | ||
1442 | ||
1443 | /* Function called by variable_decl() that adds a name to a structure | |
1444 | being built. */ | |
1445 | ||
1446 | static gfc_try | |
1447 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, | |
1448 | gfc_array_spec **as) | |
1449 | { | |
1450 | gfc_component *c; | |
1451 | gfc_try t = SUCCESS; | |
1452 | ||
1453 | /* F03:C438/C439. If the current symbol is of the same derived type that we're | |
1454 | constructing, it must have the pointer attribute. */ | |
1455 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) | |
1456 | && current_ts.u.derived == gfc_current_block () | |
1457 | && current_attr.pointer == 0) | |
1458 | { | |
1459 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1460 | return FAILURE; | |
1461 | } | |
1462 | ||
1463 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) | |
1464 | { | |
1465 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1466 | { | |
1467 | gfc_error ("Array component of structure at %C must have explicit " | |
1468 | "or deferred shape"); | |
1469 | return FAILURE; | |
1470 | } | |
1471 | } | |
1472 | ||
1473 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1474 | return FAILURE; | |
1475 | ||
1476 | c->ts = current_ts; | |
1477 | if (c->ts.type == BT_CHARACTER) | |
1478 | c->ts.u.cl = cl; | |
1479 | c->attr = current_attr; | |
1480 | ||
1481 | c->initializer = *init; | |
1482 | *init = NULL; | |
1483 | ||
1484 | c->as = *as; | |
1485 | if (c->as != NULL) | |
1486 | { | |
1487 | if (c->as->corank) | |
1488 | c->attr.codimension = 1; | |
1489 | if (c->as->rank) | |
1490 | c->attr.dimension = 1; | |
1491 | } | |
1492 | *as = NULL; | |
1493 | ||
1494 | /* Should this ever get more complicated, combine with similar section | |
1495 | in add_init_expr_to_sym into a separate function. */ | |
1496 | if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.u.cl | |
1497 | && c->ts.u.cl->length && c->ts.u.cl->length->expr_type == EXPR_CONSTANT) | |
1498 | { | |
1499 | int len; | |
1500 | ||
1501 | gcc_assert (c->ts.u.cl && c->ts.u.cl->length); | |
1502 | gcc_assert (c->ts.u.cl->length->expr_type == EXPR_CONSTANT); | |
1503 | gcc_assert (c->ts.u.cl->length->ts.type == BT_INTEGER); | |
1504 | ||
1505 | len = mpz_get_si (c->ts.u.cl->length->value.integer); | |
1506 | ||
1507 | if (c->initializer->expr_type == EXPR_CONSTANT) | |
1508 | gfc_set_constant_character_len (len, c->initializer, -1); | |
1509 | else if (mpz_cmp (c->ts.u.cl->length->value.integer, | |
1510 | c->initializer->ts.u.cl->length->value.integer)) | |
1511 | { | |
1512 | gfc_constructor *ctor; | |
1513 | ctor = gfc_constructor_first (c->initializer->value.constructor); | |
1514 | ||
1515 | if (ctor) | |
1516 | { | |
1517 | int first_len; | |
1518 | bool has_ts = (c->initializer->ts.u.cl | |
1519 | && c->initializer->ts.u.cl->length_from_typespec); | |
1520 | ||
1521 | /* Remember the length of the first element for checking | |
1522 | that all elements *in the constructor* have the same | |
1523 | length. This need not be the length of the LHS! */ | |
1524 | gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT); | |
1525 | gcc_assert (ctor->expr->ts.type == BT_CHARACTER); | |
1526 | first_len = ctor->expr->value.character.length; | |
1527 | ||
1528 | for ( ; ctor; ctor = gfc_constructor_next (ctor)) | |
1529 | if (ctor->expr->expr_type == EXPR_CONSTANT) | |
1530 | { | |
1531 | gfc_set_constant_character_len (len, ctor->expr, | |
1532 | has_ts ? -1 : first_len); | |
1533 | ctor->expr->ts.u.cl->length = gfc_copy_expr (c->ts.u.cl->length); | |
1534 | } | |
1535 | } | |
1536 | } | |
1537 | } | |
1538 | ||
1539 | /* Check array components. */ | |
1540 | if (!c->attr.dimension) | |
1541 | goto scalar; | |
1542 | ||
1543 | if (c->attr.pointer) | |
1544 | { | |
1545 | if (c->as->type != AS_DEFERRED) | |
1546 | { | |
1547 | gfc_error ("Pointer array component of structure at %C must have a " | |
1548 | "deferred shape"); | |
1549 | t = FAILURE; | |
1550 | } | |
1551 | } | |
1552 | else if (c->attr.allocatable) | |
1553 | { | |
1554 | if (c->as->type != AS_DEFERRED) | |
1555 | { | |
1556 | gfc_error ("Allocatable component of structure at %C must have a " | |
1557 | "deferred shape"); | |
1558 | t = FAILURE; | |
1559 | } | |
1560 | } | |
1561 | else | |
1562 | { | |
1563 | if (c->as->type != AS_EXPLICIT) | |
1564 | { | |
1565 | gfc_error ("Array component of structure at %C must have an " | |
1566 | "explicit shape"); | |
1567 | t = FAILURE; | |
1568 | } | |
1569 | } | |
1570 | ||
1571 | scalar: | |
1572 | if (c->ts.type == BT_CLASS) | |
1573 | gfc_build_class_symbol (&c->ts, &c->attr, &c->as, true); | |
1574 | ||
1575 | return t; | |
1576 | } | |
1577 | ||
1578 | ||
1579 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1580 | ||
1581 | match | |
1582 | gfc_match_null (gfc_expr **result) | |
1583 | { | |
1584 | gfc_symbol *sym; | |
1585 | match m; | |
1586 | ||
1587 | m = gfc_match (" null ( )"); | |
1588 | if (m != MATCH_YES) | |
1589 | return m; | |
1590 | ||
1591 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1592 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1593 | { | |
1594 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1595 | return MATCH_ERROR; | |
1596 | } | |
1597 | ||
1598 | gfc_intrinsic_symbol (sym); | |
1599 | ||
1600 | if (sym->attr.proc != PROC_INTRINSIC | |
1601 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, | |
1602 | sym->name, NULL) == FAILURE | |
1603 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
1604 | return MATCH_ERROR; | |
1605 | ||
1606 | *result = gfc_get_null_expr (&gfc_current_locus); | |
1607 | ||
1608 | return MATCH_YES; | |
1609 | } | |
1610 | ||
1611 | ||
1612 | /* Match a variable name with an optional initializer. When this | |
1613 | subroutine is called, a variable is expected to be parsed next. | |
1614 | Depending on what is happening at the moment, updates either the | |
1615 | symbol table or the current interface. */ | |
1616 | ||
1617 | static match | |
1618 | variable_decl (int elem) | |
1619 | { | |
1620 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1621 | gfc_expr *initializer, *char_len; | |
1622 | gfc_array_spec *as; | |
1623 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ | |
1624 | gfc_charlen *cl; | |
1625 | locus var_locus; | |
1626 | match m; | |
1627 | gfc_try t; | |
1628 | gfc_symbol *sym; | |
1629 | ||
1630 | initializer = NULL; | |
1631 | as = NULL; | |
1632 | cp_as = NULL; | |
1633 | ||
1634 | /* When we get here, we've just matched a list of attributes and | |
1635 | maybe a type and a double colon. The next thing we expect to see | |
1636 | is the name of the symbol. */ | |
1637 | m = gfc_match_name (name); | |
1638 | if (m != MATCH_YES) | |
1639 | goto cleanup; | |
1640 | ||
1641 | var_locus = gfc_current_locus; | |
1642 | ||
1643 | /* Now we could see the optional array spec. or character length. */ | |
1644 | m = gfc_match_array_spec (&as, true, true); | |
1645 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) | |
1646 | cp_as = gfc_copy_array_spec (as); | |
1647 | else if (m == MATCH_ERROR) | |
1648 | goto cleanup; | |
1649 | ||
1650 | if (m == MATCH_NO) | |
1651 | as = gfc_copy_array_spec (current_as); | |
1652 | else if (current_as) | |
1653 | merge_array_spec (current_as, as, true); | |
1654 | ||
1655 | char_len = NULL; | |
1656 | cl = NULL; | |
1657 | ||
1658 | if (current_ts.type == BT_CHARACTER) | |
1659 | { | |
1660 | switch (match_char_length (&char_len)) | |
1661 | { | |
1662 | case MATCH_YES: | |
1663 | cl = gfc_new_charlen (gfc_current_ns, NULL); | |
1664 | ||
1665 | cl->length = char_len; | |
1666 | break; | |
1667 | ||
1668 | /* Non-constant lengths need to be copied after the first | |
1669 | element. Also copy assumed lengths. */ | |
1670 | case MATCH_NO: | |
1671 | if (elem > 1 | |
1672 | && (current_ts.u.cl->length == NULL | |
1673 | || current_ts.u.cl->length->expr_type != EXPR_CONSTANT)) | |
1674 | { | |
1675 | cl = gfc_new_charlen (gfc_current_ns, NULL); | |
1676 | cl->length = gfc_copy_expr (current_ts.u.cl->length); | |
1677 | } | |
1678 | else | |
1679 | cl = current_ts.u.cl; | |
1680 | ||
1681 | break; | |
1682 | ||
1683 | case MATCH_ERROR: | |
1684 | goto cleanup; | |
1685 | } | |
1686 | } | |
1687 | ||
1688 | /* If this symbol has already shown up in a Cray Pointer declaration, | |
1689 | then we want to set the type & bail out. */ | |
1690 | if (gfc_option.flag_cray_pointer) | |
1691 | { | |
1692 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1693 | if (sym != NULL && sym->attr.cray_pointee) | |
1694 | { | |
1695 | sym->ts.type = current_ts.type; | |
1696 | sym->ts.kind = current_ts.kind; | |
1697 | sym->ts.u.cl = cl; | |
1698 | sym->ts.u.derived = current_ts.u.derived; | |
1699 | sym->ts.is_c_interop = current_ts.is_c_interop; | |
1700 | sym->ts.is_iso_c = current_ts.is_iso_c; | |
1701 | m = MATCH_YES; | |
1702 | ||
1703 | /* Check to see if we have an array specification. */ | |
1704 | if (cp_as != NULL) | |
1705 | { | |
1706 | if (sym->as != NULL) | |
1707 | { | |
1708 | gfc_error ("Duplicate array spec for Cray pointee at %C"); | |
1709 | gfc_free_array_spec (cp_as); | |
1710 | m = MATCH_ERROR; | |
1711 | goto cleanup; | |
1712 | } | |
1713 | else | |
1714 | { | |
1715 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1716 | gfc_internal_error ("Couldn't set pointee array spec."); | |
1717 | ||
1718 | /* Fix the array spec. */ | |
1719 | m = gfc_mod_pointee_as (sym->as); | |
1720 | if (m == MATCH_ERROR) | |
1721 | goto cleanup; | |
1722 | } | |
1723 | } | |
1724 | goto cleanup; | |
1725 | } | |
1726 | else | |
1727 | { | |
1728 | gfc_free_array_spec (cp_as); | |
1729 | } | |
1730 | } | |
1731 | ||
1732 | /* Procedure pointer as function result. */ | |
1733 | if (gfc_current_state () == COMP_FUNCTION | |
1734 | && strcmp ("ppr@", gfc_current_block ()->name) == 0 | |
1735 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0) | |
1736 | strcpy (name, "ppr@"); | |
1737 | ||
1738 | if (gfc_current_state () == COMP_FUNCTION | |
1739 | && strcmp (name, gfc_current_block ()->name) == 0 | |
1740 | && gfc_current_block ()->result | |
1741 | && strcmp ("ppr@", gfc_current_block ()->result->name) == 0) | |
1742 | strcpy (name, "ppr@"); | |
1743 | ||
1744 | /* OK, we've successfully matched the declaration. Now put the | |
1745 | symbol in the current namespace, because it might be used in the | |
1746 | optional initialization expression for this symbol, e.g. this is | |
1747 | perfectly legal: | |
1748 | ||
1749 | integer, parameter :: i = huge(i) | |
1750 | ||
1751 | This is only true for parameters or variables of a basic type. | |
1752 | For components of derived types, it is not true, so we don't | |
1753 | create a symbol for those yet. If we fail to create the symbol, | |
1754 | bail out. */ | |
1755 | if (gfc_current_state () != COMP_DERIVED | |
1756 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1757 | { | |
1758 | m = MATCH_ERROR; | |
1759 | goto cleanup; | |
1760 | } | |
1761 | ||
1762 | /* An interface body specifies all of the procedure's | |
1763 | characteristics and these shall be consistent with those | |
1764 | specified in the procedure definition, except that the interface | |
1765 | may specify a procedure that is not pure if the procedure is | |
1766 | defined to be pure(12.3.2). */ | |
1767 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) | |
1768 | && gfc_current_ns->proc_name | |
1769 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
1770 | && current_ts.u.derived->ns != gfc_current_ns) | |
1771 | { | |
1772 | gfc_symtree *st; | |
1773 | st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.u.derived->name); | |
1774 | if (!(current_ts.u.derived->attr.imported | |
1775 | && st != NULL | |
1776 | && st->n.sym == current_ts.u.derived) | |
1777 | && !gfc_current_ns->has_import_set) | |
1778 | { | |
1779 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1780 | "interface", name); | |
1781 | m = MATCH_ERROR; | |
1782 | goto cleanup; | |
1783 | } | |
1784 | } | |
1785 | ||
1786 | /* In functions that have a RESULT variable defined, the function | |
1787 | name always refers to function calls. Therefore, the name is | |
1788 | not allowed to appear in specification statements. */ | |
1789 | if (gfc_current_state () == COMP_FUNCTION | |
1790 | && gfc_current_block () != NULL | |
1791 | && gfc_current_block ()->result != NULL | |
1792 | && gfc_current_block ()->result != gfc_current_block () | |
1793 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1794 | { | |
1795 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1796 | m = MATCH_ERROR; | |
1797 | goto cleanup; | |
1798 | } | |
1799 | ||
1800 | /* We allow old-style initializations of the form | |
1801 | integer i /2/, j(4) /3*3, 1/ | |
1802 | (if no colon has been seen). These are different from data | |
1803 | statements in that initializers are only allowed to apply to the | |
1804 | variable immediately preceding, i.e. | |
1805 | integer i, j /1, 2/ | |
1806 | is not allowed. Therefore we have to do some work manually, that | |
1807 | could otherwise be left to the matchers for DATA statements. */ | |
1808 | ||
1809 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1810 | { | |
1811 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1812 | "initialization at %C") == FAILURE) | |
1813 | return MATCH_ERROR; | |
1814 | ||
1815 | return match_old_style_init (name); | |
1816 | } | |
1817 | ||
1818 | /* The double colon must be present in order to have initializers. | |
1819 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1820 | if (colon_seen) | |
1821 | { | |
1822 | if (gfc_match (" =>") == MATCH_YES) | |
1823 | { | |
1824 | if (!current_attr.pointer) | |
1825 | { | |
1826 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1827 | m = MATCH_ERROR; | |
1828 | goto cleanup; | |
1829 | } | |
1830 | ||
1831 | m = gfc_match_null (&initializer); | |
1832 | if (m == MATCH_NO) | |
1833 | { | |
1834 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
1835 | m = MATCH_ERROR; | |
1836 | } | |
1837 | ||
1838 | if (gfc_pure (NULL) && gfc_state_stack->state != COMP_DERIVED) | |
1839 | { | |
1840 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
1841 | "a PURE procedure"); | |
1842 | m = MATCH_ERROR; | |
1843 | } | |
1844 | ||
1845 | if (m != MATCH_YES) | |
1846 | goto cleanup; | |
1847 | ||
1848 | } | |
1849 | else if (gfc_match_char ('=') == MATCH_YES) | |
1850 | { | |
1851 | if (current_attr.pointer) | |
1852 | { | |
1853 | gfc_error ("Pointer initialization at %C requires '=>', " | |
1854 | "not '='"); | |
1855 | m = MATCH_ERROR; | |
1856 | goto cleanup; | |
1857 | } | |
1858 | ||
1859 | m = gfc_match_init_expr (&initializer); | |
1860 | if (m == MATCH_NO) | |
1861 | { | |
1862 | gfc_error ("Expected an initialization expression at %C"); | |
1863 | m = MATCH_ERROR; | |
1864 | } | |
1865 | ||
1866 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL) | |
1867 | && gfc_state_stack->state != COMP_DERIVED) | |
1868 | { | |
1869 | gfc_error ("Initialization of variable at %C is not allowed in " | |
1870 | "a PURE procedure"); | |
1871 | m = MATCH_ERROR; | |
1872 | } | |
1873 | ||
1874 | if (m != MATCH_YES) | |
1875 | goto cleanup; | |
1876 | } | |
1877 | } | |
1878 | ||
1879 | if (initializer != NULL && current_attr.allocatable | |
1880 | && gfc_current_state () == COMP_DERIVED) | |
1881 | { | |
1882 | gfc_error ("Initialization of allocatable component at %C is not " | |
1883 | "allowed"); | |
1884 | m = MATCH_ERROR; | |
1885 | goto cleanup; | |
1886 | } | |
1887 | ||
1888 | /* Add the initializer. Note that it is fine if initializer is | |
1889 | NULL here, because we sometimes also need to check if a | |
1890 | declaration *must* have an initialization expression. */ | |
1891 | if (gfc_current_state () != COMP_DERIVED) | |
1892 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1893 | else | |
1894 | { | |
1895 | if (current_ts.type == BT_DERIVED | |
1896 | && !current_attr.pointer && !initializer) | |
1897 | initializer = gfc_default_initializer (¤t_ts); | |
1898 | t = build_struct (name, cl, &initializer, &as); | |
1899 | } | |
1900 | ||
1901 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1902 | ||
1903 | cleanup: | |
1904 | /* Free stuff up and return. */ | |
1905 | gfc_free_expr (initializer); | |
1906 | gfc_free_array_spec (as); | |
1907 | ||
1908 | return m; | |
1909 | } | |
1910 | ||
1911 | ||
1912 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. | |
1913 | This assumes that the byte size is equal to the kind number for | |
1914 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
1915 | ||
1916 | match | |
1917 | gfc_match_old_kind_spec (gfc_typespec *ts) | |
1918 | { | |
1919 | match m; | |
1920 | int original_kind; | |
1921 | ||
1922 | if (gfc_match_char ('*') != MATCH_YES) | |
1923 | return MATCH_NO; | |
1924 | ||
1925 | m = gfc_match_small_literal_int (&ts->kind, NULL); | |
1926 | if (m != MATCH_YES) | |
1927 | return MATCH_ERROR; | |
1928 | ||
1929 | original_kind = ts->kind; | |
1930 | ||
1931 | /* Massage the kind numbers for complex types. */ | |
1932 | if (ts->type == BT_COMPLEX) | |
1933 | { | |
1934 | if (ts->kind % 2) | |
1935 | { | |
1936 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1937 | gfc_basic_typename (ts->type), original_kind); | |
1938 | return MATCH_ERROR; | |
1939 | } | |
1940 | ts->kind /= 2; | |
1941 | } | |
1942 | ||
1943 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) | |
1944 | { | |
1945 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1946 | gfc_basic_typename (ts->type), original_kind); | |
1947 | return MATCH_ERROR; | |
1948 | } | |
1949 | ||
1950 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", | |
1951 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1952 | return MATCH_ERROR; | |
1953 | ||
1954 | return MATCH_YES; | |
1955 | } | |
1956 | ||
1957 | ||
1958 | /* Match a kind specification. Since kinds are generally optional, we | |
1959 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1960 | string is found, then we know we have an error. */ | |
1961 | ||
1962 | match | |
1963 | gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only) | |
1964 | { | |
1965 | locus where, loc; | |
1966 | gfc_expr *e; | |
1967 | match m, n; | |
1968 | char c; | |
1969 | const char *msg; | |
1970 | ||
1971 | m = MATCH_NO; | |
1972 | n = MATCH_YES; | |
1973 | e = NULL; | |
1974 | ||
1975 | where = loc = gfc_current_locus; | |
1976 | ||
1977 | if (kind_expr_only) | |
1978 | goto kind_expr; | |
1979 | ||
1980 | if (gfc_match_char ('(') == MATCH_NO) | |
1981 | return MATCH_NO; | |
1982 | ||
1983 | /* Also gobbles optional text. */ | |
1984 | if (gfc_match (" kind = ") == MATCH_YES) | |
1985 | m = MATCH_ERROR; | |
1986 | ||
1987 | loc = gfc_current_locus; | |
1988 | ||
1989 | kind_expr: | |
1990 | n = gfc_match_init_expr (&e); | |
1991 | ||
1992 | if (n != MATCH_YES) | |
1993 | { | |
1994 | if (gfc_matching_function) | |
1995 | { | |
1996 | /* The function kind expression might include use associated or | |
1997 | imported parameters and try again after the specification | |
1998 | expressions..... */ | |
1999 | if (gfc_match_char (')') != MATCH_YES) | |
2000 | { | |
2001 | gfc_error ("Missing right parenthesis at %C"); | |
2002 | m = MATCH_ERROR; | |
2003 | goto no_match; | |
2004 | } | |
2005 | ||
2006 | gfc_free_expr (e); | |
2007 | gfc_undo_symbols (); | |
2008 | return MATCH_YES; | |
2009 | } | |
2010 | else | |
2011 | { | |
2012 | /* ....or else, the match is real. */ | |
2013 | if (n == MATCH_NO) | |
2014 | gfc_error ("Expected initialization expression at %C"); | |
2015 | if (n != MATCH_YES) | |
2016 | return MATCH_ERROR; | |
2017 | } | |
2018 | } | |
2019 | ||
2020 | if (e->rank != 0) | |
2021 | { | |
2022 | gfc_error ("Expected scalar initialization expression at %C"); | |
2023 | m = MATCH_ERROR; | |
2024 | goto no_match; | |
2025 | } | |
2026 | ||
2027 | msg = gfc_extract_int (e, &ts->kind); | |
2028 | ||
2029 | if (msg != NULL) | |
2030 | { | |
2031 | gfc_error (msg); | |
2032 | m = MATCH_ERROR; | |
2033 | goto no_match; | |
2034 | } | |
2035 | ||
2036 | /* Before throwing away the expression, let's see if we had a | |
2037 | C interoperable kind (and store the fact). */ | |
2038 | if (e->ts.is_c_interop == 1) | |
2039 | { | |
2040 | /* Mark this as c interoperable if being declared with one | |
2041 | of the named constants from iso_c_binding. */ | |
2042 | ts->is_c_interop = e->ts.is_iso_c; | |
2043 | ts->f90_type = e->ts.f90_type; | |
2044 | } | |
2045 | ||
2046 | gfc_free_expr (e); | |
2047 | e = NULL; | |
2048 | ||
2049 | /* Ignore errors to this point, if we've gotten here. This means | |
2050 | we ignore the m=MATCH_ERROR from above. */ | |
2051 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) | |
2052 | { | |
2053 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
2054 | gfc_basic_typename (ts->type)); | |
2055 | gfc_current_locus = where; | |
2056 | return MATCH_ERROR; | |
2057 | } | |
2058 | ||
2059 | /* Warn if, e.g., c_int is used for a REAL variable, but not | |
2060 | if, e.g., c_double is used for COMPLEX as the standard | |
2061 | explicitly says that the kind type parameter for complex and real | |
2062 | variable is the same, i.e. c_float == c_float_complex. */ | |
2063 | if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type | |
2064 | && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX) | |
2065 | || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL))) | |
2066 | gfc_warning_now ("C kind type parameter is for type %s but type at %L " | |
2067 | "is %s", gfc_basic_typename (ts->f90_type), &where, | |
2068 | gfc_basic_typename (ts->type)); | |
2069 | ||
2070 | gfc_gobble_whitespace (); | |
2071 | if ((c = gfc_next_ascii_char ()) != ')' | |
2072 | && (ts->type != BT_CHARACTER || c != ',')) | |
2073 | { | |
2074 | if (ts->type == BT_CHARACTER) | |
2075 | gfc_error ("Missing right parenthesis or comma at %C"); | |
2076 | else | |
2077 | gfc_error ("Missing right parenthesis at %C"); | |
2078 | m = MATCH_ERROR; | |
2079 | } | |
2080 | else | |
2081 | /* All tests passed. */ | |
2082 | m = MATCH_YES; | |
2083 | ||
2084 | if(m == MATCH_ERROR) | |
2085 | gfc_current_locus = where; | |
2086 | ||
2087 | /* Return what we know from the test(s). */ | |
2088 | return m; | |
2089 | ||
2090 | no_match: | |
2091 | gfc_free_expr (e); | |
2092 | gfc_current_locus = where; | |
2093 | return m; | |
2094 | } | |
2095 | ||
2096 | ||
2097 | static match | |
2098 | match_char_kind (int * kind, int * is_iso_c) | |
2099 | { | |
2100 | locus where; | |
2101 | gfc_expr *e; | |
2102 | match m, n; | |
2103 | const char *msg; | |
2104 | ||
2105 | m = MATCH_NO; | |
2106 | e = NULL; | |
2107 | where = gfc_current_locus; | |
2108 | ||
2109 | n = gfc_match_init_expr (&e); | |
2110 | ||
2111 | if (n != MATCH_YES && gfc_matching_function) | |
2112 | { | |
2113 | /* The expression might include use-associated or imported | |
2114 | parameters and try again after the specification | |
2115 | expressions. */ | |
2116 | gfc_free_expr (e); | |
2117 | gfc_undo_symbols (); | |
2118 | return MATCH_YES; | |
2119 | } | |
2120 | ||
2121 | if (n == MATCH_NO) | |
2122 | gfc_error ("Expected initialization expression at %C"); | |
2123 | if (n != MATCH_YES) | |
2124 | return MATCH_ERROR; | |
2125 | ||
2126 | if (e->rank != 0) | |
2127 | { | |
2128 | gfc_error ("Expected scalar initialization expression at %C"); | |
2129 | m = MATCH_ERROR; | |
2130 | goto no_match; | |
2131 | } | |
2132 | ||
2133 | msg = gfc_extract_int (e, kind); | |
2134 | *is_iso_c = e->ts.is_iso_c; | |
2135 | if (msg != NULL) | |
2136 | { | |
2137 | gfc_error (msg); | |
2138 | m = MATCH_ERROR; | |
2139 | goto no_match; | |
2140 | } | |
2141 | ||
2142 | gfc_free_expr (e); | |
2143 | ||
2144 | /* Ignore errors to this point, if we've gotten here. This means | |
2145 | we ignore the m=MATCH_ERROR from above. */ | |
2146 | if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0) | |
2147 | { | |
2148 | gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind); | |
2149 | m = MATCH_ERROR; | |
2150 | } | |
2151 | else | |
2152 | /* All tests passed. */ | |
2153 | m = MATCH_YES; | |
2154 | ||
2155 | if (m == MATCH_ERROR) | |
2156 | gfc_current_locus = where; | |
2157 | ||
2158 | /* Return what we know from the test(s). */ | |
2159 | return m; | |
2160 | ||
2161 | no_match: | |
2162 | gfc_free_expr (e); | |
2163 | gfc_current_locus = where; | |
2164 | return m; | |
2165 | } | |
2166 | ||
2167 | ||
2168 | /* Match the various kind/length specifications in a CHARACTER | |
2169 | declaration. We don't return MATCH_NO. */ | |
2170 | ||
2171 | match | |
2172 | gfc_match_char_spec (gfc_typespec *ts) | |
2173 | { | |
2174 | int kind, seen_length, is_iso_c; | |
2175 | gfc_charlen *cl; | |
2176 | gfc_expr *len; | |
2177 | match m; | |
2178 | ||
2179 | len = NULL; | |
2180 | seen_length = 0; | |
2181 | kind = 0; | |
2182 | is_iso_c = 0; | |
2183 | ||
2184 | /* Try the old-style specification first. */ | |
2185 | old_char_selector = 0; | |
2186 | ||
2187 | m = match_char_length (&len); | |
2188 | if (m != MATCH_NO) | |
2189 | { | |
2190 | if (m == MATCH_YES) | |
2191 | old_char_selector = 1; | |
2192 | seen_length = 1; | |
2193 | goto done; | |
2194 | } | |
2195 | ||
2196 | m = gfc_match_char ('('); | |
2197 | if (m != MATCH_YES) | |
2198 | { | |
2199 | m = MATCH_YES; /* Character without length is a single char. */ | |
2200 | goto done; | |
2201 | } | |
2202 | ||
2203 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ | |
2204 | if (gfc_match (" kind =") == MATCH_YES) | |
2205 | { | |
2206 | m = match_char_kind (&kind, &is_iso_c); | |
2207 | ||
2208 | if (m == MATCH_ERROR) | |
2209 | goto done; | |
2210 | if (m == MATCH_NO) | |
2211 | goto syntax; | |
2212 | ||
2213 | if (gfc_match (" , len =") == MATCH_NO) | |
2214 | goto rparen; | |
2215 | ||
2216 | m = char_len_param_value (&len); | |
2217 | if (m == MATCH_NO) | |
2218 | goto syntax; | |
2219 | if (m == MATCH_ERROR) | |
2220 | goto done; | |
2221 | seen_length = 1; | |
2222 | ||
2223 | goto rparen; | |
2224 | } | |
2225 | ||
2226 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ | |
2227 | if (gfc_match (" len =") == MATCH_YES) | |
2228 | { | |
2229 | m = char_len_param_value (&len); | |
2230 | if (m == MATCH_NO) | |
2231 | goto syntax; | |
2232 | if (m == MATCH_ERROR) | |
2233 | goto done; | |
2234 | seen_length = 1; | |
2235 | ||
2236 | if (gfc_match_char (')') == MATCH_YES) | |
2237 | goto done; | |
2238 | ||
2239 | if (gfc_match (" , kind =") != MATCH_YES) | |
2240 | goto syntax; | |
2241 | ||
2242 | if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR) | |
2243 | goto done; | |
2244 | ||
2245 | goto rparen; | |
2246 | } | |
2247 | ||
2248 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ | |
2249 | m = char_len_param_value (&len); | |
2250 | if (m == MATCH_NO) | |
2251 | goto syntax; | |
2252 | if (m == MATCH_ERROR) | |
2253 | goto done; | |
2254 | seen_length = 1; | |
2255 | ||
2256 | m = gfc_match_char (')'); | |
2257 | if (m == MATCH_YES) | |
2258 | goto done; | |
2259 | ||
2260 | if (gfc_match_char (',') != MATCH_YES) | |
2261 | goto syntax; | |
2262 | ||
2263 | gfc_match (" kind ="); /* Gobble optional text. */ | |
2264 | ||
2265 | m = match_char_kind (&kind, &is_iso_c); | |
2266 | if (m == MATCH_ERROR) | |
2267 | goto done; | |
2268 | if (m == MATCH_NO) | |
2269 | goto syntax; | |
2270 | ||
2271 | rparen: | |
2272 | /* Require a right-paren at this point. */ | |
2273 | m = gfc_match_char (')'); | |
2274 | if (m == MATCH_YES) | |
2275 | goto done; | |
2276 | ||
2277 | syntax: | |
2278 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
2279 | m = MATCH_ERROR; | |
2280 | gfc_free_expr (len); | |
2281 | return m; | |
2282 | ||
2283 | done: | |
2284 | /* Deal with character functions after USE and IMPORT statements. */ | |
2285 | if (gfc_matching_function) | |
2286 | { | |
2287 | gfc_free_expr (len); | |
2288 | gfc_undo_symbols (); | |
2289 | return MATCH_YES; | |
2290 | } | |
2291 | ||
2292 | if (m != MATCH_YES) | |
2293 | { | |
2294 | gfc_free_expr (len); | |
2295 | return m; | |
2296 | } | |
2297 | ||
2298 | /* Do some final massaging of the length values. */ | |
2299 | cl = gfc_new_charlen (gfc_current_ns, NULL); | |
2300 | ||
2301 | if (seen_length == 0) | |
2302 | cl->length = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1); | |
2303 | else | |
2304 | cl->length = len; | |
2305 | ||
2306 | ts->u.cl = cl; | |
2307 | ts->kind = kind == 0 ? gfc_default_character_kind : kind; | |
2308 | ||
2309 | /* We have to know if it was a c interoperable kind so we can | |
2310 | do accurate type checking of bind(c) procs, etc. */ | |
2311 | if (kind != 0) | |
2312 | /* Mark this as c interoperable if being declared with one | |
2313 | of the named constants from iso_c_binding. */ | |
2314 | ts->is_c_interop = is_iso_c; | |
2315 | else if (len != NULL) | |
2316 | /* Here, we might have parsed something such as: character(c_char) | |
2317 | In this case, the parsing code above grabs the c_char when | |
2318 | looking for the length (line 1690, roughly). it's the last | |
2319 | testcase for parsing the kind params of a character variable. | |
2320 | However, it's not actually the length. this seems like it | |
2321 | could be an error. | |
2322 | To see if the user used a C interop kind, test the expr | |
2323 | of the so called length, and see if it's C interoperable. */ | |
2324 | ts->is_c_interop = len->ts.is_iso_c; | |
2325 | ||
2326 | return MATCH_YES; | |
2327 | } | |
2328 | ||
2329 | ||
2330 | /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts | |
2331 | structure to the matched specification. This is necessary for FUNCTION and | |
2332 | IMPLICIT statements. | |
2333 | ||
2334 | If implicit_flag is nonzero, then we don't check for the optional | |
2335 | kind specification. Not doing so is needed for matching an IMPLICIT | |
2336 | statement correctly. */ | |
2337 | ||
2338 | match | |
2339 | gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag) | |
2340 | { | |
2341 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2342 | gfc_symbol *sym; | |
2343 | match m; | |
2344 | char c; | |
2345 | bool seen_deferred_kind; | |
2346 | ||
2347 | /* A belt and braces check that the typespec is correctly being treated | |
2348 | as a deferred characteristic association. */ | |
2349 | seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION) | |
2350 | && (gfc_current_block ()->result->ts.kind == -1) | |
2351 | && (ts->kind == -1); | |
2352 | gfc_clear_ts (ts); | |
2353 | if (seen_deferred_kind) | |
2354 | ts->kind = -1; | |
2355 | ||
2356 | /* Clear the current binding label, in case one is given. */ | |
2357 | curr_binding_label[0] = '\0'; | |
2358 | ||
2359 | if (gfc_match (" byte") == MATCH_YES) | |
2360 | { | |
2361 | if (gfc_notify_std (GFC_STD_GNU, "Extension: BYTE type at %C") | |
2362 | == FAILURE) | |
2363 | return MATCH_ERROR; | |
2364 | ||
2365 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
2366 | { | |
2367 | gfc_error ("BYTE type used at %C " | |
2368 | "is not available on the target machine"); | |
2369 | return MATCH_ERROR; | |
2370 | } | |
2371 | ||
2372 | ts->type = BT_INTEGER; | |
2373 | ts->kind = 1; | |
2374 | return MATCH_YES; | |
2375 | } | |
2376 | ||
2377 | if (gfc_match (" integer") == MATCH_YES) | |
2378 | { | |
2379 | ts->type = BT_INTEGER; | |
2380 | ts->kind = gfc_default_integer_kind; | |
2381 | goto get_kind; | |
2382 | } | |
2383 | ||
2384 | if (gfc_match (" character") == MATCH_YES) | |
2385 | { | |
2386 | ts->type = BT_CHARACTER; | |
2387 | if (implicit_flag == 0) | |
2388 | return gfc_match_char_spec (ts); | |
2389 | else | |
2390 | return MATCH_YES; | |
2391 | } | |
2392 | ||
2393 | if (gfc_match (" real") == MATCH_YES) | |
2394 | { | |
2395 | ts->type = BT_REAL; | |
2396 | ts->kind = gfc_default_real_kind; | |
2397 | goto get_kind; | |
2398 | } | |
2399 | ||
2400 | if (gfc_match (" double precision") == MATCH_YES) | |
2401 | { | |
2402 | ts->type = BT_REAL; | |
2403 | ts->kind = gfc_default_double_kind; | |
2404 | return MATCH_YES; | |
2405 | } | |
2406 | ||
2407 | if (gfc_match (" complex") == MATCH_YES) | |
2408 | { | |
2409 | ts->type = BT_COMPLEX; | |
2410 | ts->kind = gfc_default_complex_kind; | |
2411 | goto get_kind; | |
2412 | } | |
2413 | ||
2414 | if (gfc_match (" double complex") == MATCH_YES) | |
2415 | { | |
2416 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " | |
2417 | "conform to the Fortran 95 standard") == FAILURE) | |
2418 | return MATCH_ERROR; | |
2419 | ||
2420 | ts->type = BT_COMPLEX; | |
2421 | ts->kind = gfc_default_double_kind; | |
2422 | return MATCH_YES; | |
2423 | } | |
2424 | ||
2425 | if (gfc_match (" logical") == MATCH_YES) | |
2426 | { | |
2427 | ts->type = BT_LOGICAL; | |
2428 | ts->kind = gfc_default_logical_kind; | |
2429 | goto get_kind; | |
2430 | } | |
2431 | ||
2432 | m = gfc_match (" type ( %n )", name); | |
2433 | if (m == MATCH_YES) | |
2434 | ts->type = BT_DERIVED; | |
2435 | else | |
2436 | { | |
2437 | m = gfc_match (" class ( %n )", name); | |
2438 | if (m != MATCH_YES) | |
2439 | return m; | |
2440 | ts->type = BT_CLASS; | |
2441 | ||
2442 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: CLASS statement at %C") | |
2443 | == FAILURE) | |
2444 | return MATCH_ERROR; | |
2445 | } | |
2446 | ||
2447 | /* Defer association of the derived type until the end of the | |
2448 | specification block. However, if the derived type can be | |
2449 | found, add it to the typespec. */ | |
2450 | if (gfc_matching_function) | |
2451 | { | |
2452 | ts->u.derived = NULL; | |
2453 | if (gfc_current_state () != COMP_INTERFACE | |
2454 | && !gfc_find_symbol (name, NULL, 1, &sym) && sym) | |
2455 | ts->u.derived = sym; | |
2456 | return MATCH_YES; | |
2457 | } | |
2458 | ||
2459 | /* Search for the name but allow the components to be defined later. If | |
2460 | type = -1, this typespec has been seen in a function declaration but | |
2461 | the type could not be accessed at that point. */ | |
2462 | sym = NULL; | |
2463 | if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym)) | |
2464 | { | |
2465 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2466 | return MATCH_ERROR; | |
2467 | } | |
2468 | else if (ts->kind == -1) | |
2469 | { | |
2470 | int iface = gfc_state_stack->previous->state != COMP_INTERFACE | |
2471 | || gfc_current_ns->has_import_set; | |
2472 | if (gfc_find_symbol (name, NULL, iface, &sym)) | |
2473 | { | |
2474 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2475 | return MATCH_ERROR; | |
2476 | } | |
2477 | ||
2478 | ts->kind = 0; | |
2479 | if (sym == NULL) | |
2480 | return MATCH_NO; | |
2481 | } | |
2482 | ||
2483 | if (sym->attr.flavor != FL_DERIVED | |
2484 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) | |
2485 | return MATCH_ERROR; | |
2486 | ||
2487 | gfc_set_sym_referenced (sym); | |
2488 | ts->u.derived = sym; | |
2489 | ||
2490 | return MATCH_YES; | |
2491 | ||
2492 | get_kind: | |
2493 | /* For all types except double, derived and character, look for an | |
2494 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
2495 | if (implicit_flag == 1) | |
2496 | return MATCH_YES; | |
2497 | ||
2498 | if (gfc_current_form == FORM_FREE) | |
2499 | { | |
2500 | c = gfc_peek_ascii_char (); | |
2501 | if (!gfc_is_whitespace (c) && c != '*' && c != '(' | |
2502 | && c != ':' && c != ',') | |
2503 | return MATCH_NO; | |
2504 | } | |
2505 | ||
2506 | m = gfc_match_kind_spec (ts, false); | |
2507 | if (m == MATCH_NO && ts->type != BT_CHARACTER) | |
2508 | m = gfc_match_old_kind_spec (ts); | |
2509 | ||
2510 | /* Defer association of the KIND expression of function results | |
2511 | until after USE and IMPORT statements. */ | |
2512 | if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ()) | |
2513 | || gfc_matching_function) | |
2514 | return MATCH_YES; | |
2515 | ||
2516 | if (m == MATCH_NO) | |
2517 | m = MATCH_YES; /* No kind specifier found. */ | |
2518 | ||
2519 | return m; | |
2520 | } | |
2521 | ||
2522 | ||
2523 | /* Match an IMPLICIT NONE statement. Actually, this statement is | |
2524 | already matched in parse.c, or we would not end up here in the | |
2525 | first place. So the only thing we need to check, is if there is | |
2526 | trailing garbage. If not, the match is successful. */ | |
2527 | ||
2528 | match | |
2529 | gfc_match_implicit_none (void) | |
2530 | { | |
2531 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; | |
2532 | } | |
2533 | ||
2534 | ||
2535 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
2536 | ||
2537 | static match | |
2538 | match_implicit_range (void) | |
2539 | { | |
2540 | char c, c1, c2; | |
2541 | int inner; | |
2542 | locus cur_loc; | |
2543 | ||
2544 | cur_loc = gfc_current_locus; | |
2545 | ||
2546 | gfc_gobble_whitespace (); | |
2547 | c = gfc_next_ascii_char (); | |
2548 | if (c != '(') | |
2549 | { | |
2550 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
2551 | goto bad; | |
2552 | } | |
2553 | ||
2554 | inner = 1; | |
2555 | while (inner) | |
2556 | { | |
2557 | gfc_gobble_whitespace (); | |
2558 | c1 = gfc_next_ascii_char (); | |
2559 | if (!ISALPHA (c1)) | |
2560 | goto bad; | |
2561 | ||
2562 | gfc_gobble_whitespace (); | |
2563 | c = gfc_next_ascii_char (); | |
2564 | ||
2565 | switch (c) | |
2566 | { | |
2567 | case ')': | |
2568 | inner = 0; /* Fall through. */ | |
2569 | ||
2570 | case ',': | |
2571 | c2 = c1; | |
2572 | break; | |
2573 | ||
2574 | case '-': | |
2575 | gfc_gobble_whitespace (); | |
2576 | c2 = gfc_next_ascii_char (); | |
2577 | if (!ISALPHA (c2)) | |
2578 | goto bad; | |
2579 | ||
2580 | gfc_gobble_whitespace (); | |
2581 | c = gfc_next_ascii_char (); | |
2582 | ||
2583 | if ((c != ',') && (c != ')')) | |
2584 | goto bad; | |
2585 | if (c == ')') | |
2586 | inner = 0; | |
2587 | ||
2588 | break; | |
2589 | ||
2590 | default: | |
2591 | goto bad; | |
2592 | } | |
2593 | ||
2594 | if (c1 > c2) | |
2595 | { | |
2596 | gfc_error ("Letters must be in alphabetic order in " | |
2597 | "IMPLICIT statement at %C"); | |
2598 | goto bad; | |
2599 | } | |
2600 | ||
2601 | /* See if we can add the newly matched range to the pending | |
2602 | implicits from this IMPLICIT statement. We do not check for | |
2603 | conflicts with whatever earlier IMPLICIT statements may have | |
2604 | set. This is done when we've successfully finished matching | |
2605 | the current one. */ | |
2606 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) | |
2607 | goto bad; | |
2608 | } | |
2609 | ||
2610 | return MATCH_YES; | |
2611 | ||
2612 | bad: | |
2613 | gfc_syntax_error (ST_IMPLICIT); | |
2614 | ||
2615 | gfc_current_locus = cur_loc; | |
2616 | return MATCH_ERROR; | |
2617 | } | |
2618 | ||
2619 | ||
2620 | /* Match an IMPLICIT statement, storing the types for | |
2621 | gfc_set_implicit() if the statement is accepted by the parser. | |
2622 | There is a strange looking, but legal syntactic construction | |
2623 | possible. It looks like: | |
2624 | ||
2625 | IMPLICIT INTEGER (a-b) (c-d) | |
2626 | ||
2627 | This is legal if "a-b" is a constant expression that happens to | |
2628 | equal one of the legal kinds for integers. The real problem | |
2629 | happens with an implicit specification that looks like: | |
2630 | ||
2631 | IMPLICIT INTEGER (a-b) | |
2632 | ||
2633 | In this case, a typespec matcher that is "greedy" (as most of the | |
2634 | matchers are) gobbles the character range as a kindspec, leaving | |
2635 | nothing left. We therefore have to go a bit more slowly in the | |
2636 | matching process by inhibiting the kindspec checking during | |
2637 | typespec matching and checking for a kind later. */ | |
2638 | ||
2639 | match | |
2640 | gfc_match_implicit (void) | |
2641 | { | |
2642 | gfc_typespec ts; | |
2643 | locus cur_loc; | |
2644 | char c; | |
2645 | match m; | |
2646 | ||
2647 | gfc_clear_ts (&ts); | |
2648 | ||
2649 | /* We don't allow empty implicit statements. */ | |
2650 | if (gfc_match_eos () == MATCH_YES) | |
2651 | { | |
2652 | gfc_error ("Empty IMPLICIT statement at %C"); | |
2653 | return MATCH_ERROR; | |
2654 | } | |
2655 | ||
2656 | do | |
2657 | { | |
2658 | /* First cleanup. */ | |
2659 | gfc_clear_new_implicit (); | |
2660 | ||
2661 | /* A basic type is mandatory here. */ | |
2662 | m = gfc_match_decl_type_spec (&ts, 1); | |
2663 | if (m == MATCH_ERROR) | |
2664 | goto error; | |
2665 | if (m == MATCH_NO) | |
2666 | goto syntax; | |
2667 | ||
2668 | cur_loc = gfc_current_locus; | |
2669 | m = match_implicit_range (); | |
2670 | ||
2671 | if (m == MATCH_YES) | |
2672 | { | |
2673 | /* We may have <TYPE> (<RANGE>). */ | |
2674 | gfc_gobble_whitespace (); | |
2675 | c = gfc_next_ascii_char (); | |
2676 | if ((c == '\n') || (c == ',')) | |
2677 | { | |
2678 | /* Check for CHARACTER with no length parameter. */ | |
2679 | if (ts.type == BT_CHARACTER && !ts.u.cl) | |
2680 | { | |
2681 | ts.kind = gfc_default_character_kind; | |
2682 | ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); | |
2683 | ts.u.cl->length = gfc_get_int_expr (gfc_default_integer_kind, | |
2684 | NULL, 1); | |
2685 | } | |
2686 | ||
2687 | /* Record the Successful match. */ | |
2688 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2689 | return MATCH_ERROR; | |
2690 | continue; | |
2691 | } | |
2692 | ||
2693 | gfc_current_locus = cur_loc; | |
2694 | } | |
2695 | ||
2696 | /* Discard the (incorrectly) matched range. */ | |
2697 | gfc_clear_new_implicit (); | |
2698 | ||
2699 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
2700 | if (ts.type == BT_CHARACTER) | |
2701 | m = gfc_match_char_spec (&ts); | |
2702 | else | |
2703 | { | |
2704 | m = gfc_match_kind_spec (&ts, false); | |
2705 | if (m == MATCH_NO) | |
2706 | { | |
2707 | m = gfc_match_old_kind_spec (&ts); | |
2708 | if (m == MATCH_ERROR) | |
2709 | goto error; | |
2710 | if (m == MATCH_NO) | |
2711 | goto syntax; | |
2712 | } | |
2713 | } | |
2714 | if (m == MATCH_ERROR) | |
2715 | goto error; | |
2716 | ||
2717 | m = match_implicit_range (); | |
2718 | if (m == MATCH_ERROR) | |
2719 | goto error; | |
2720 | if (m == MATCH_NO) | |
2721 | goto syntax; | |
2722 | ||
2723 | gfc_gobble_whitespace (); | |
2724 | c = gfc_next_ascii_char (); | |
2725 | if ((c != '\n') && (c != ',')) | |
2726 | goto syntax; | |
2727 | ||
2728 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2729 | return MATCH_ERROR; | |
2730 | } | |
2731 | while (c == ','); | |
2732 | ||
2733 | return MATCH_YES; | |
2734 | ||
2735 | syntax: | |
2736 | gfc_syntax_error (ST_IMPLICIT); | |
2737 | ||
2738 | error: | |
2739 | return MATCH_ERROR; | |
2740 | } | |
2741 | ||
2742 | ||
2743 | match | |
2744 | gfc_match_import (void) | |
2745 | { | |
2746 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2747 | match m; | |
2748 | gfc_symbol *sym; | |
2749 | gfc_symtree *st; | |
2750 | ||
2751 | if (gfc_current_ns->proc_name == NULL | |
2752 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
2753 | { | |
2754 | gfc_error ("IMPORT statement at %C only permitted in " | |
2755 | "an INTERFACE body"); | |
2756 | return MATCH_ERROR; | |
2757 | } | |
2758 | ||
2759 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") | |
2760 | == FAILURE) | |
2761 | return MATCH_ERROR; | |
2762 | ||
2763 | if (gfc_match_eos () == MATCH_YES) | |
2764 | { | |
2765 | /* All host variables should be imported. */ | |
2766 | gfc_current_ns->has_import_set = 1; | |
2767 | return MATCH_YES; | |
2768 | } | |
2769 | ||
2770 | if (gfc_match (" ::") == MATCH_YES) | |
2771 | { | |
2772 | if (gfc_match_eos () == MATCH_YES) | |
2773 | { | |
2774 | gfc_error ("Expecting list of named entities at %C"); | |
2775 | return MATCH_ERROR; | |
2776 | } | |
2777 | } | |
2778 | ||
2779 | for(;;) | |
2780 | { | |
2781 | m = gfc_match (" %n", name); | |
2782 | switch (m) | |
2783 | { | |
2784 | case MATCH_YES: | |
2785 | if (gfc_current_ns->parent != NULL | |
2786 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) | |
2787 | { | |
2788 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2789 | return MATCH_ERROR; | |
2790 | } | |
2791 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
2792 | && gfc_find_symbol (name, | |
2793 | gfc_current_ns->proc_name->ns->parent, | |
2794 | 1, &sym)) | |
2795 | { | |
2796 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2797 | return MATCH_ERROR; | |
2798 | } | |
2799 | ||
2800 | if (sym == NULL) | |
2801 | { | |
2802 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2803 | "at %C - does not exist.", name); | |
2804 | return MATCH_ERROR; | |
2805 | } | |
2806 | ||
2807 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) | |
2808 | { | |
2809 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2810 | "at %C.", name); | |
2811 | goto next_item; | |
2812 | } | |
2813 | ||
2814 | st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name); | |
2815 | st->n.sym = sym; | |
2816 | sym->refs++; | |
2817 | sym->attr.imported = 1; | |
2818 | ||
2819 | goto next_item; | |
2820 | ||
2821 | case MATCH_NO: | |
2822 | break; | |
2823 | ||
2824 | case MATCH_ERROR: | |
2825 | return MATCH_ERROR; | |
2826 | } | |
2827 | ||
2828 | next_item: | |
2829 | if (gfc_match_eos () == MATCH_YES) | |
2830 | break; | |
2831 | if (gfc_match_char (',') != MATCH_YES) | |
2832 | goto syntax; | |
2833 | } | |
2834 | ||
2835 | return MATCH_YES; | |
2836 | ||
2837 | syntax: | |
2838 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2839 | return MATCH_ERROR; | |
2840 | } | |
2841 | ||
2842 | ||
2843 | /* A minimal implementation of gfc_match without whitespace, escape | |
2844 | characters or variable arguments. Returns true if the next | |
2845 | characters match the TARGET template exactly. */ | |
2846 | ||
2847 | static bool | |
2848 | match_string_p (const char *target) | |
2849 | { | |
2850 | const char *p; | |
2851 | ||
2852 | for (p = target; *p; p++) | |
2853 | if ((char) gfc_next_ascii_char () != *p) | |
2854 | return false; | |
2855 | return true; | |
2856 | } | |
2857 | ||
2858 | /* Matches an attribute specification including array specs. If | |
2859 | successful, leaves the variables current_attr and current_as | |
2860 | holding the specification. Also sets the colon_seen variable for | |
2861 | later use by matchers associated with initializations. | |
2862 | ||
2863 | This subroutine is a little tricky in the sense that we don't know | |
2864 | if we really have an attr-spec until we hit the double colon. | |
2865 | Until that time, we can only return MATCH_NO. This forces us to | |
2866 | check for duplicate specification at this level. */ | |
2867 | ||
2868 | static match | |
2869 | match_attr_spec (void) | |
2870 | { | |
2871 | /* Modifiers that can exist in a type statement. */ | |
2872 | typedef enum | |
2873 | { GFC_DECL_BEGIN = 0, | |
2874 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
2875 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
2876 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, | |
2877 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
2878 | DECL_IS_BIND_C, DECL_CODIMENSION, DECL_ASYNCHRONOUS, DECL_CONTIGUOUS, | |
2879 | DECL_NONE, GFC_DECL_END /* Sentinel */ | |
2880 | } | |
2881 | decl_types; | |
2882 | ||
2883 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
2884 | #define NUM_DECL GFC_DECL_END | |
2885 | ||
2886 | locus start, seen_at[NUM_DECL]; | |
2887 | int seen[NUM_DECL]; | |
2888 | unsigned int d; | |
2889 | const char *attr; | |
2890 | match m; | |
2891 | gfc_try t; | |
2892 | ||
2893 | gfc_clear_attr (¤t_attr); | |
2894 | start = gfc_current_locus; | |
2895 | ||
2896 | current_as = NULL; | |
2897 | colon_seen = 0; | |
2898 | ||
2899 | /* See if we get all of the keywords up to the final double colon. */ | |
2900 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2901 | seen[d] = 0; | |
2902 | ||
2903 | for (;;) | |
2904 | { | |
2905 | char ch; | |
2906 | ||
2907 | d = DECL_NONE; | |
2908 | gfc_gobble_whitespace (); | |
2909 | ||
2910 | ch = gfc_next_ascii_char (); | |
2911 | if (ch == ':') | |
2912 | { | |
2913 | /* This is the successful exit condition for the loop. */ | |
2914 | if (gfc_next_ascii_char () == ':') | |
2915 | break; | |
2916 | } | |
2917 | else if (ch == ',') | |
2918 | { | |
2919 | gfc_gobble_whitespace (); | |
2920 | switch (gfc_peek_ascii_char ()) | |
2921 | { | |
2922 | case 'a': | |
2923 | gfc_next_ascii_char (); | |
2924 | switch (gfc_next_ascii_char ()) | |
2925 | { | |
2926 | case 'l': | |
2927 | if (match_string_p ("locatable")) | |
2928 | { | |
2929 | /* Matched "allocatable". */ | |
2930 | d = DECL_ALLOCATABLE; | |
2931 | } | |
2932 | break; | |
2933 | ||
2934 | case 's': | |
2935 | if (match_string_p ("ynchronous")) | |
2936 | { | |
2937 | /* Matched "asynchronous". */ | |
2938 | d = DECL_ASYNCHRONOUS; | |
2939 | } | |
2940 | break; | |
2941 | } | |
2942 | break; | |
2943 | ||
2944 | case 'b': | |
2945 | /* Try and match the bind(c). */ | |
2946 | m = gfc_match_bind_c (NULL, true); | |
2947 | if (m == MATCH_YES) | |
2948 | d = DECL_IS_BIND_C; | |
2949 | else if (m == MATCH_ERROR) | |
2950 | goto cleanup; | |
2951 | break; | |
2952 | ||
2953 | case 'c': | |
2954 | gfc_next_ascii_char (); | |
2955 | if ('o' != gfc_next_ascii_char ()) | |
2956 | break; | |
2957 | switch (gfc_next_ascii_char ()) | |
2958 | { | |
2959 | case 'd': | |
2960 | if (match_string_p ("imension")) | |
2961 | { | |
2962 | d = DECL_CODIMENSION; | |
2963 | break; | |
2964 | } | |
2965 | case 'n': | |
2966 | if (match_string_p ("tiguous")) | |
2967 | { | |
2968 | d = DECL_CONTIGUOUS; | |
2969 | break; | |
2970 | } | |
2971 | } | |
2972 | break; | |
2973 | ||
2974 | case 'd': | |
2975 | if (match_string_p ("dimension")) | |
2976 | d = DECL_DIMENSION; | |
2977 | break; | |
2978 | ||
2979 | case 'e': | |
2980 | if (match_string_p ("external")) | |
2981 | d = DECL_EXTERNAL; | |
2982 | break; | |
2983 | ||
2984 | case 'i': | |
2985 | if (match_string_p ("int")) | |
2986 | { | |
2987 | ch = gfc_next_ascii_char (); | |
2988 | if (ch == 'e') | |
2989 | { | |
2990 | if (match_string_p ("nt")) | |
2991 | { | |
2992 | /* Matched "intent". */ | |
2993 | /* TODO: Call match_intent_spec from here. */ | |
2994 | if (gfc_match (" ( in out )") == MATCH_YES) | |
2995 | d = DECL_INOUT; | |
2996 | else if (gfc_match (" ( in )") == MATCH_YES) | |
2997 | d = DECL_IN; | |
2998 | else if (gfc_match (" ( out )") == MATCH_YES) | |
2999 | d = DECL_OUT; | |
3000 | } | |
3001 | } | |
3002 | else if (ch == 'r') | |
3003 | { | |
3004 | if (match_string_p ("insic")) | |
3005 | { | |
3006 | /* Matched "intrinsic". */ | |
3007 | d = DECL_INTRINSIC; | |
3008 | } | |
3009 | } | |
3010 | } | |
3011 | break; | |
3012 | ||
3013 | case 'o': | |
3014 | if (match_string_p ("optional")) | |
3015 | d = DECL_OPTIONAL; | |
3016 | break; | |
3017 | ||
3018 | case 'p': | |
3019 | gfc_next_ascii_char (); | |
3020 | switch (gfc_next_ascii_char ()) | |
3021 | { | |
3022 | case 'a': | |
3023 | if (match_string_p ("rameter")) | |
3024 | { | |
3025 | /* Matched "parameter". */ | |
3026 | d = DECL_PARAMETER; | |
3027 | } | |
3028 | break; | |
3029 | ||
3030 | case 'o': | |
3031 | if (match_string_p ("inter")) | |
3032 | { | |
3033 | /* Matched "pointer". */ | |
3034 | d = DECL_POINTER; | |
3035 | } | |
3036 | break; | |
3037 | ||
3038 | case 'r': | |
3039 | ch = gfc_next_ascii_char (); | |
3040 | if (ch == 'i') | |
3041 | { | |
3042 | if (match_string_p ("vate")) | |
3043 | { | |
3044 | /* Matched "private". */ | |
3045 | d = DECL_PRIVATE; | |
3046 | } | |
3047 | } | |
3048 | else if (ch == 'o') | |
3049 | { | |
3050 | if (match_string_p ("tected")) | |
3051 | { | |
3052 | /* Matched "protected". */ | |
3053 | d = DECL_PROTECTED; | |
3054 | } | |
3055 | } | |
3056 | break; | |
3057 | ||
3058 | case 'u': | |
3059 | if (match_string_p ("blic")) | |
3060 | { | |
3061 | /* Matched "public". */ | |
3062 | d = DECL_PUBLIC; | |
3063 | } | |
3064 | break; | |
3065 | } | |
3066 | break; | |
3067 | ||
3068 | case 's': | |
3069 | if (match_string_p ("save")) | |
3070 | d = DECL_SAVE; | |
3071 | break; | |
3072 | ||
3073 | case 't': | |
3074 | if (match_string_p ("target")) | |
3075 | d = DECL_TARGET; | |
3076 | break; | |
3077 | ||
3078 | case 'v': | |
3079 | gfc_next_ascii_char (); | |
3080 | ch = gfc_next_ascii_char (); | |
3081 | if (ch == 'a') | |
3082 | { | |
3083 | if (match_string_p ("lue")) | |
3084 | { | |
3085 | /* Matched "value". */ | |
3086 | d = DECL_VALUE; | |
3087 | } | |
3088 | } | |
3089 | else if (ch == 'o') | |
3090 | { | |
3091 | if (match_string_p ("latile")) | |
3092 | { | |
3093 | /* Matched "volatile". */ | |
3094 | d = DECL_VOLATILE; | |
3095 | } | |
3096 | } | |
3097 | break; | |
3098 | } | |
3099 | } | |
3100 | ||
3101 | /* No double colon and no recognizable decl_type, so assume that | |
3102 | we've been looking at something else the whole time. */ | |
3103 | if (d == DECL_NONE) | |
3104 | { | |
3105 | m = MATCH_NO; | |
3106 | goto cleanup; | |
3107 | } | |
3108 | ||
3109 | /* Check to make sure any parens are paired up correctly. */ | |
3110 | if (gfc_match_parens () == MATCH_ERROR) | |
3111 | { | |
3112 | m = MATCH_ERROR; | |
3113 | goto cleanup; | |
3114 | } | |
3115 | ||
3116 | seen[d]++; | |
3117 | seen_at[d] = gfc_current_locus; | |
3118 | ||
3119 | if (d == DECL_DIMENSION || d == DECL_CODIMENSION) | |
3120 | { | |
3121 | gfc_array_spec *as = NULL; | |
3122 | ||
3123 | m = gfc_match_array_spec (&as, d == DECL_DIMENSION, | |
3124 | d == DECL_CODIMENSION); | |
3125 | ||
3126 | if (current_as == NULL) | |
3127 | current_as = as; | |
3128 | else if (m == MATCH_YES) | |
3129 | { | |
3130 | merge_array_spec (as, current_as, false); | |
3131 | gfc_free (as); | |
3132 | } | |
3133 | ||
3134 | if (m == MATCH_NO) | |
3135 | { | |
3136 | if (d == DECL_CODIMENSION) | |
3137 | gfc_error ("Missing codimension specification at %C"); | |
3138 | else | |
3139 | gfc_error ("Missing dimension specification at %C"); | |
3140 | m = MATCH_ERROR; | |
3141 | } | |
3142 | ||
3143 | if (m == MATCH_ERROR) | |
3144 | goto cleanup; | |
3145 | } | |
3146 | } | |
3147 | ||
3148 | /* Since we've seen a double colon, we have to be looking at an | |
3149 | attr-spec. This means that we can now issue errors. */ | |
3150 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3151 | if (seen[d] > 1) | |
3152 | { | |
3153 | switch (d) | |
3154 | { | |
3155 | case DECL_ALLOCATABLE: | |
3156 | attr = "ALLOCATABLE"; | |
3157 | break; | |
3158 | case DECL_ASYNCHRONOUS: | |
3159 | attr = "ASYNCHRONOUS"; | |
3160 | break; | |
3161 | case DECL_CODIMENSION: | |
3162 | attr = "CODIMENSION"; | |
3163 | break; | |
3164 | case DECL_CONTIGUOUS: | |
3165 | attr = "CONTIGUOUS"; | |
3166 | break; | |
3167 | case DECL_DIMENSION: | |
3168 | attr = "DIMENSION"; | |
3169 | break; | |
3170 | case DECL_EXTERNAL: | |
3171 | attr = "EXTERNAL"; | |
3172 | break; | |
3173 | case DECL_IN: | |
3174 | attr = "INTENT (IN)"; | |
3175 | break; | |
3176 | case DECL_OUT: | |
3177 | attr = "INTENT (OUT)"; | |
3178 | break; | |
3179 | case DECL_INOUT: | |
3180 | attr = "INTENT (IN OUT)"; | |
3181 | break; | |
3182 | case DECL_INTRINSIC: | |
3183 | attr = "INTRINSIC"; | |
3184 | break; | |
3185 | case DECL_OPTIONAL: | |
3186 | attr = "OPTIONAL"; | |
3187 | break; | |
3188 | case DECL_PARAMETER: | |
3189 | attr = "PARAMETER"; | |
3190 | break; | |
3191 | case DECL_POINTER: | |
3192 | attr = "POINTER"; | |
3193 | break; | |
3194 | case DECL_PROTECTED: | |
3195 | attr = "PROTECTED"; | |
3196 | break; | |
3197 | case DECL_PRIVATE: | |
3198 | attr = "PRIVATE"; | |
3199 | break; | |
3200 | case DECL_PUBLIC: | |
3201 | attr = "PUBLIC"; | |
3202 | break; | |
3203 | case DECL_SAVE: | |
3204 | attr = "SAVE"; | |
3205 | break; | |
3206 | case DECL_TARGET: | |
3207 | attr = "TARGET"; | |
3208 | break; | |
3209 | case DECL_IS_BIND_C: | |
3210 | attr = "IS_BIND_C"; | |
3211 | break; | |
3212 | case DECL_VALUE: | |
3213 | attr = "VALUE"; | |
3214 | break; | |
3215 | case DECL_VOLATILE: | |
3216 | attr = "VOLATILE"; | |
3217 | break; | |
3218 | default: | |
3219 | attr = NULL; /* This shouldn't happen. */ | |
3220 | } | |
3221 | ||
3222 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
3223 | m = MATCH_ERROR; | |
3224 | goto cleanup; | |
3225 | } | |
3226 | ||
3227 | /* Now that we've dealt with duplicate attributes, add the attributes | |
3228 | to the current attribute. */ | |
3229 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3230 | { | |
3231 | if (seen[d] == 0) | |
3232 | continue; | |
3233 | ||
3234 | if (gfc_current_state () == COMP_DERIVED | |
3235 | && d != DECL_DIMENSION && d != DECL_CODIMENSION | |
3236 | && d != DECL_POINTER && d != DECL_PRIVATE | |
3237 | && d != DECL_PUBLIC && d != DECL_CONTIGUOUS && d != DECL_NONE) | |
3238 | { | |
3239 | if (d == DECL_ALLOCATABLE) | |
3240 | { | |
3241 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " | |
3242 | "attribute at %C in a TYPE definition") | |
3243 | == FAILURE) | |
3244 | { | |
3245 | m = MATCH_ERROR; | |
3246 | goto cleanup; | |
3247 | } | |
3248 | } | |
3249 | else | |
3250 | { | |
3251 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
3252 | &seen_at[d]); | |
3253 | m = MATCH_ERROR; | |
3254 | goto cleanup; | |
3255 | } | |
3256 | } | |
3257 | ||
3258 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) | |
3259 | && gfc_current_state () != COMP_MODULE) | |
3260 | { | |
3261 | if (d == DECL_PRIVATE) | |
3262 | attr = "PRIVATE"; | |
3263 | else | |
3264 | attr = "PUBLIC"; | |
3265 | if (gfc_current_state () == COMP_DERIVED | |
3266 | && gfc_state_stack->previous | |
3267 | && gfc_state_stack->previous->state == COMP_MODULE) | |
3268 | { | |
3269 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s " | |
3270 | "at %L in a TYPE definition", attr, | |
3271 | &seen_at[d]) | |
3272 | == FAILURE) | |
3273 | { | |
3274 | m = MATCH_ERROR; | |
3275 | goto cleanup; | |
3276 | } | |
3277 | } | |
3278 | else | |
3279 | { | |
3280 | gfc_error ("%s attribute at %L is not allowed outside of the " | |
3281 | "specification part of a module", attr, &seen_at[d]); | |
3282 | m = MATCH_ERROR; | |
3283 | goto cleanup; | |
3284 | } | |
3285 | } | |
3286 | ||
3287 | switch (d) | |
3288 | { | |
3289 | case DECL_ALLOCATABLE: | |
3290 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
3291 | break; | |
3292 | ||
3293 | case DECL_ASYNCHRONOUS: | |
3294 | if (gfc_notify_std (GFC_STD_F2003, | |
3295 | "Fortran 2003: ASYNCHRONOUS attribute at %C") | |
3296 | == FAILURE) | |
3297 | t = FAILURE; | |
3298 | else | |
3299 | t = gfc_add_asynchronous (¤t_attr, NULL, &seen_at[d]); | |
3300 | break; | |
3301 | ||
3302 | case DECL_CODIMENSION: | |
3303 | t = gfc_add_codimension (¤t_attr, NULL, &seen_at[d]); | |
3304 | break; | |
3305 | ||
3306 | case DECL_CONTIGUOUS: | |
3307 | if (gfc_notify_std (GFC_STD_F2008, | |
3308 | "Fortran 2008: CONTIGUOUS attribute at %C") | |
3309 | == FAILURE) | |
3310 | t = FAILURE; | |
3311 | else | |
3312 | t = gfc_add_contiguous (¤t_attr, NULL, &seen_at[d]); | |
3313 | break; | |
3314 | ||
3315 | case DECL_DIMENSION: | |
3316 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); | |
3317 | break; | |
3318 | ||
3319 | case DECL_EXTERNAL: | |
3320 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
3321 | break; | |
3322 | ||
3323 | case DECL_IN: | |
3324 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
3325 | break; | |
3326 | ||
3327 | case DECL_OUT: | |
3328 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
3329 | break; | |
3330 | ||
3331 | case DECL_INOUT: | |
3332 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
3333 | break; | |
3334 | ||
3335 | case DECL_INTRINSIC: | |
3336 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
3337 | break; | |
3338 | ||
3339 | case DECL_OPTIONAL: | |
3340 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
3341 | break; | |
3342 | ||
3343 | case DECL_PARAMETER: | |
3344 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); | |
3345 | break; | |
3346 | ||
3347 | case DECL_POINTER: | |
3348 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
3349 | break; | |
3350 | ||
3351 | case DECL_PROTECTED: | |
3352 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
3353 | { | |
3354 | gfc_error ("PROTECTED at %C only allowed in specification " | |
3355 | "part of a module"); | |
3356 | t = FAILURE; | |
3357 | break; | |
3358 | } | |
3359 | ||
3360 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " | |
3361 | "attribute at %C") | |
3362 | == FAILURE) | |
3363 | t = FAILURE; | |
3364 | else | |
3365 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
3366 | break; | |
3367 | ||
3368 | case DECL_PRIVATE: | |
3369 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, | |
3370 | &seen_at[d]); | |
3371 | break; | |
3372 | ||
3373 | case DECL_PUBLIC: | |
3374 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, | |
3375 | &seen_at[d]); | |
3376 | break; | |
3377 | ||
3378 | case DECL_SAVE: | |
3379 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); | |
3380 | break; | |
3381 | ||
3382 | case DECL_TARGET: | |
3383 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
3384 | break; | |
3385 | ||
3386 | case DECL_IS_BIND_C: | |
3387 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); | |
3388 | break; | |
3389 | ||
3390 | case DECL_VALUE: | |
3391 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " | |
3392 | "at %C") | |
3393 | == FAILURE) | |
3394 | t = FAILURE; | |
3395 | else | |
3396 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
3397 | break; | |
3398 | ||
3399 | case DECL_VOLATILE: | |
3400 | if (gfc_notify_std (GFC_STD_F2003, | |
3401 | "Fortran 2003: VOLATILE attribute at %C") | |
3402 | == FAILURE) | |
3403 | t = FAILURE; | |
3404 | else | |
3405 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
3406 | break; | |
3407 | ||
3408 | default: | |
3409 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
3410 | } | |
3411 | ||
3412 | if (t == FAILURE) | |
3413 | { | |
3414 | m = MATCH_ERROR; | |
3415 | goto cleanup; | |
3416 | } | |
3417 | } | |
3418 | ||
3419 | colon_seen = 1; | |
3420 | return MATCH_YES; | |
3421 | ||
3422 | cleanup: | |
3423 | gfc_current_locus = start; | |
3424 | gfc_free_array_spec (current_as); | |
3425 | current_as = NULL; | |
3426 | return m; | |
3427 | } | |
3428 | ||
3429 | ||
3430 | /* Set the binding label, dest_label, either with the binding label | |
3431 | stored in the given gfc_typespec, ts, or if none was provided, it | |
3432 | will be the symbol name in all lower case, as required by the draft | |
3433 | (J3/04-007, section 15.4.1). If a binding label was given and | |
3434 | there is more than one argument (num_idents), it is an error. */ | |
3435 | ||
3436 | gfc_try | |
3437 | set_binding_label (char *dest_label, const char *sym_name, int num_idents) | |
3438 | { | |
3439 | if (num_idents > 1 && has_name_equals) | |
3440 | { | |
3441 | gfc_error ("Multiple identifiers provided with " | |
3442 | "single NAME= specifier at %C"); | |
3443 | return FAILURE; | |
3444 | } | |
3445 | ||
3446 | if (curr_binding_label[0] != '\0') | |
3447 | { | |
3448 | /* Binding label given; store in temp holder til have sym. */ | |
3449 | strcpy (dest_label, curr_binding_label); | |
3450 | } | |
3451 | else | |
3452 | { | |
3453 | /* No binding label given, and the NAME= specifier did not exist, | |
3454 | which means there was no NAME="". */ | |
3455 | if (sym_name != NULL && has_name_equals == 0) | |
3456 | strcpy (dest_label, sym_name); | |
3457 | } | |
3458 | ||
3459 | return SUCCESS; | |
3460 | } | |
3461 | ||
3462 | ||
3463 | /* Set the status of the given common block as being BIND(C) or not, | |
3464 | depending on the given parameter, is_bind_c. */ | |
3465 | ||
3466 | void | |
3467 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) | |
3468 | { | |
3469 | com_block->is_bind_c = is_bind_c; | |
3470 | return; | |
3471 | } | |
3472 | ||
3473 | ||
3474 | /* Verify that the given gfc_typespec is for a C interoperable type. */ | |
3475 | ||
3476 | gfc_try | |
3477 | verify_c_interop (gfc_typespec *ts) | |
3478 | { | |
3479 | if (ts->type == BT_DERIVED && ts->u.derived != NULL) | |
3480 | return (ts->u.derived->ts.is_c_interop ? SUCCESS : FAILURE); | |
3481 | else if (ts->is_c_interop != 1) | |
3482 | return FAILURE; | |
3483 | ||
3484 | return SUCCESS; | |
3485 | } | |
3486 | ||
3487 | ||
3488 | /* Verify that the variables of a given common block, which has been | |
3489 | defined with the attribute specifier bind(c), to be of a C | |
3490 | interoperable type. Errors will be reported here, if | |
3491 | encountered. */ | |
3492 | ||
3493 | gfc_try | |
3494 | verify_com_block_vars_c_interop (gfc_common_head *com_block) | |
3495 | { | |
3496 | gfc_symbol *curr_sym = NULL; | |
3497 | gfc_try retval = SUCCESS; | |
3498 | ||
3499 | curr_sym = com_block->head; | |
3500 | ||
3501 | /* Make sure we have at least one symbol. */ | |
3502 | if (curr_sym == NULL) | |
3503 | return retval; | |
3504 | ||
3505 | /* Here we know we have a symbol, so we'll execute this loop | |
3506 | at least once. */ | |
3507 | do | |
3508 | { | |
3509 | /* The second to last param, 1, says this is in a common block. */ | |
3510 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); | |
3511 | curr_sym = curr_sym->common_next; | |
3512 | } while (curr_sym != NULL); | |
3513 | ||
3514 | return retval; | |
3515 | } | |
3516 | ||
3517 | ||
3518 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, | |
3519 | an appropriate error message is reported. */ | |
3520 | ||
3521 | gfc_try | |
3522 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, | |
3523 | int is_in_common, gfc_common_head *com_block) | |
3524 | { | |
3525 | bool bind_c_function = false; | |
3526 | gfc_try retval = SUCCESS; | |
3527 | ||
3528 | if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c) | |
3529 | bind_c_function = true; | |
3530 | ||
3531 | if (tmp_sym->attr.function && tmp_sym->result != NULL) | |
3532 | { | |
3533 | tmp_sym = tmp_sym->result; | |
3534 | /* Make sure it wasn't an implicitly typed result. */ | |
3535 | if (tmp_sym->attr.implicit_type) | |
3536 | { | |
3537 | gfc_warning ("Implicitly declared BIND(C) function '%s' at " | |
3538 | "%L may not be C interoperable", tmp_sym->name, | |
3539 | &tmp_sym->declared_at); | |
3540 | tmp_sym->ts.f90_type = tmp_sym->ts.type; | |
3541 | /* Mark it as C interoperable to prevent duplicate warnings. */ | |
3542 | tmp_sym->ts.is_c_interop = 1; | |
3543 | tmp_sym->attr.is_c_interop = 1; | |
3544 | } | |
3545 | } | |
3546 | ||
3547 | /* Here, we know we have the bind(c) attribute, so if we have | |
3548 | enough type info, then verify that it's a C interop kind. | |
3549 | The info could be in the symbol already, or possibly still in | |
3550 | the given ts (current_ts), so look in both. */ | |
3551 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) | |
3552 | { | |
3553 | if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS) | |
3554 | { | |
3555 | /* See if we're dealing with a sym in a common block or not. */ | |
3556 | if (is_in_common == 1) | |
3557 | { | |
3558 | gfc_warning ("Variable '%s' in common block '%s' at %L " | |
3559 | "may not be a C interoperable " | |
3560 | "kind though common block '%s' is BIND(C)", | |
3561 | tmp_sym->name, com_block->name, | |
3562 | &(tmp_sym->declared_at), com_block->name); | |
3563 | } | |
3564 | else | |
3565 | { | |
3566 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) | |
3567 | gfc_error ("Type declaration '%s' at %L is not C " | |
3568 | "interoperable but it is BIND(C)", | |
3569 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3570 | else | |
3571 | gfc_warning ("Variable '%s' at %L " | |
3572 | "may not be a C interoperable " | |
3573 | "kind but it is bind(c)", | |
3574 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3575 | } | |
3576 | } | |
3577 | ||
3578 | /* Variables declared w/in a common block can't be bind(c) | |
3579 | since there's no way for C to see these variables, so there's | |
3580 | semantically no reason for the attribute. */ | |
3581 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) | |
3582 | { | |
3583 | gfc_error ("Variable '%s' in common block '%s' at " | |
3584 | "%L cannot be declared with BIND(C) " | |
3585 | "since it is not a global", | |
3586 | tmp_sym->name, com_block->name, | |
3587 | &(tmp_sym->declared_at)); | |
3588 | retval = FAILURE; | |
3589 | } | |
3590 | ||
3591 | /* Scalar variables that are bind(c) can not have the pointer | |
3592 | or allocatable attributes. */ | |
3593 | if (tmp_sym->attr.is_bind_c == 1) | |
3594 | { | |
3595 | if (tmp_sym->attr.pointer == 1) | |
3596 | { | |
3597 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3598 | "POINTER and BIND(C) attributes", | |
3599 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3600 | retval = FAILURE; | |
3601 | } | |
3602 | ||
3603 | if (tmp_sym->attr.allocatable == 1) | |
3604 | { | |
3605 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3606 | "ALLOCATABLE and BIND(C) attributes", | |
3607 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3608 | retval = FAILURE; | |
3609 | } | |
3610 | ||
3611 | } | |
3612 | ||
3613 | /* If it is a BIND(C) function, make sure the return value is a | |
3614 | scalar value. The previous tests in this function made sure | |
3615 | the type is interoperable. */ | |
3616 | if (bind_c_function && tmp_sym->as != NULL) | |
3617 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3618 | "be an array", tmp_sym->name, &(tmp_sym->declared_at)); | |
3619 | ||
3620 | /* BIND(C) functions can not return a character string. */ | |
3621 | if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER) | |
3622 | if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL | |
3623 | || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT | |
3624 | || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0) | |
3625 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3626 | "be a character string", tmp_sym->name, | |
3627 | &(tmp_sym->declared_at)); | |
3628 | } | |
3629 | ||
3630 | /* See if the symbol has been marked as private. If it has, make sure | |
3631 | there is no binding label and warn the user if there is one. */ | |
3632 | if (tmp_sym->attr.access == ACCESS_PRIVATE | |
3633 | && tmp_sym->binding_label[0] != '\0') | |
3634 | /* Use gfc_warning_now because we won't say that the symbol fails | |
3635 | just because of this. */ | |
3636 | gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " | |
3637 | "given the binding label '%s'", tmp_sym->name, | |
3638 | &(tmp_sym->declared_at), tmp_sym->binding_label); | |
3639 | ||
3640 | return retval; | |
3641 | } | |
3642 | ||
3643 | ||
3644 | /* Set the appropriate fields for a symbol that's been declared as | |
3645 | BIND(C) (the is_bind_c flag and the binding label), and verify that | |
3646 | the type is C interoperable. Errors are reported by the functions | |
3647 | used to set/test these fields. */ | |
3648 | ||
3649 | gfc_try | |
3650 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) | |
3651 | { | |
3652 | gfc_try retval = SUCCESS; | |
3653 | ||
3654 | /* TODO: Do we need to make sure the vars aren't marked private? */ | |
3655 | ||
3656 | /* Set the is_bind_c bit in symbol_attribute. */ | |
3657 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); | |
3658 | ||
3659 | if (set_binding_label (tmp_sym->binding_label, tmp_sym->name, | |
3660 | num_idents) != SUCCESS) | |
3661 | return FAILURE; | |
3662 | ||
3663 | return retval; | |
3664 | } | |
3665 | ||
3666 | ||
3667 | /* Set the fields marking the given common block as BIND(C), including | |
3668 | a binding label, and report any errors encountered. */ | |
3669 | ||
3670 | gfc_try | |
3671 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) | |
3672 | { | |
3673 | gfc_try retval = SUCCESS; | |
3674 | ||
3675 | /* destLabel, common name, typespec (which may have binding label). */ | |
3676 | if (set_binding_label (com_block->binding_label, com_block->name, num_idents) | |
3677 | != SUCCESS) | |
3678 | return FAILURE; | |
3679 | ||
3680 | /* Set the given common block (com_block) to being bind(c) (1). */ | |
3681 | set_com_block_bind_c (com_block, 1); | |
3682 | ||
3683 | return retval; | |
3684 | } | |
3685 | ||
3686 | ||
3687 | /* Retrieve the list of one or more identifiers that the given bind(c) | |
3688 | attribute applies to. */ | |
3689 | ||
3690 | gfc_try | |
3691 | get_bind_c_idents (void) | |
3692 | { | |
3693 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3694 | int num_idents = 0; | |
3695 | gfc_symbol *tmp_sym = NULL; | |
3696 | match found_id; | |
3697 | gfc_common_head *com_block = NULL; | |
3698 | ||
3699 | if (gfc_match_name (name) == MATCH_YES) | |
3700 | { | |
3701 | found_id = MATCH_YES; | |
3702 | gfc_get_ha_symbol (name, &tmp_sym); | |
3703 | } | |
3704 | else if (match_common_name (name) == MATCH_YES) | |
3705 | { | |
3706 | found_id = MATCH_YES; | |
3707 | com_block = gfc_get_common (name, 0); | |
3708 | } | |
3709 | else | |
3710 | { | |
3711 | gfc_error ("Need either entity or common block name for " | |
3712 | "attribute specification statement at %C"); | |
3713 | return FAILURE; | |
3714 | } | |
3715 | ||
3716 | /* Save the current identifier and look for more. */ | |
3717 | do | |
3718 | { | |
3719 | /* Increment the number of identifiers found for this spec stmt. */ | |
3720 | num_idents++; | |
3721 | ||
3722 | /* Make sure we have a sym or com block, and verify that it can | |
3723 | be bind(c). Set the appropriate field(s) and look for more | |
3724 | identifiers. */ | |
3725 | if (tmp_sym != NULL || com_block != NULL) | |
3726 | { | |
3727 | if (tmp_sym != NULL) | |
3728 | { | |
3729 | if (set_verify_bind_c_sym (tmp_sym, num_idents) | |
3730 | != SUCCESS) | |
3731 | return FAILURE; | |
3732 | } | |
3733 | else | |
3734 | { | |
3735 | if (set_verify_bind_c_com_block(com_block, num_idents) | |
3736 | != SUCCESS) | |
3737 | return FAILURE; | |
3738 | } | |
3739 | ||
3740 | /* Look to see if we have another identifier. */ | |
3741 | tmp_sym = NULL; | |
3742 | if (gfc_match_eos () == MATCH_YES) | |
3743 | found_id = MATCH_NO; | |
3744 | else if (gfc_match_char (',') != MATCH_YES) | |
3745 | found_id = MATCH_NO; | |
3746 | else if (gfc_match_name (name) == MATCH_YES) | |
3747 | { | |
3748 | found_id = MATCH_YES; | |
3749 | gfc_get_ha_symbol (name, &tmp_sym); | |
3750 | } | |
3751 | else if (match_common_name (name) == MATCH_YES) | |
3752 | { | |
3753 | found_id = MATCH_YES; | |
3754 | com_block = gfc_get_common (name, 0); | |
3755 | } | |
3756 | else | |
3757 | { | |
3758 | gfc_error ("Missing entity or common block name for " | |
3759 | "attribute specification statement at %C"); | |
3760 | return FAILURE; | |
3761 | } | |
3762 | } | |
3763 | else | |
3764 | { | |
3765 | gfc_internal_error ("Missing symbol"); | |
3766 | } | |
3767 | } while (found_id == MATCH_YES); | |
3768 | ||
3769 | /* if we get here we were successful */ | |
3770 | return SUCCESS; | |
3771 | } | |
3772 | ||
3773 | ||
3774 | /* Try and match a BIND(C) attribute specification statement. */ | |
3775 | ||
3776 | match | |
3777 | gfc_match_bind_c_stmt (void) | |
3778 | { | |
3779 | match found_match = MATCH_NO; | |
3780 | gfc_typespec *ts; | |
3781 | ||
3782 | ts = ¤t_ts; | |
3783 | ||
3784 | /* This may not be necessary. */ | |
3785 | gfc_clear_ts (ts); | |
3786 | /* Clear the temporary binding label holder. */ | |
3787 | curr_binding_label[0] = '\0'; | |
3788 | ||
3789 | /* Look for the bind(c). */ | |
3790 | found_match = gfc_match_bind_c (NULL, true); | |
3791 | ||
3792 | if (found_match == MATCH_YES) | |
3793 | { | |
3794 | /* Look for the :: now, but it is not required. */ | |
3795 | gfc_match (" :: "); | |
3796 | ||
3797 | /* Get the identifier(s) that needs to be updated. This may need to | |
3798 | change to hand the flag(s) for the attr specified so all identifiers | |
3799 | found can have all appropriate parts updated (assuming that the same | |
3800 | spec stmt can have multiple attrs, such as both bind(c) and | |
3801 | allocatable...). */ | |
3802 | if (get_bind_c_idents () != SUCCESS) | |
3803 | /* Error message should have printed already. */ | |
3804 | return MATCH_ERROR; | |
3805 | } | |
3806 | ||
3807 | return found_match; | |
3808 | } | |
3809 | ||
3810 | ||
3811 | /* Match a data declaration statement. */ | |
3812 | ||
3813 | match | |
3814 | gfc_match_data_decl (void) | |
3815 | { | |
3816 | gfc_symbol *sym; | |
3817 | match m; | |
3818 | int elem; | |
3819 | ||
3820 | num_idents_on_line = 0; | |
3821 | ||
3822 | m = gfc_match_decl_type_spec (¤t_ts, 0); | |
3823 | if (m != MATCH_YES) | |
3824 | return m; | |
3825 | ||
3826 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) | |
3827 | && gfc_current_state () != COMP_DERIVED) | |
3828 | { | |
3829 | sym = gfc_use_derived (current_ts.u.derived); | |
3830 | ||
3831 | if (sym == NULL) | |
3832 | { | |
3833 | m = MATCH_ERROR; | |
3834 | goto cleanup; | |
3835 | } | |
3836 | ||
3837 | current_ts.u.derived = sym; | |
3838 | } | |
3839 | ||
3840 | m = match_attr_spec (); | |
3841 | if (m == MATCH_ERROR) | |
3842 | { | |
3843 | m = MATCH_NO; | |
3844 | goto cleanup; | |
3845 | } | |
3846 | ||
3847 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) | |
3848 | && current_ts.u.derived->components == NULL | |
3849 | && !current_ts.u.derived->attr.zero_comp) | |
3850 | { | |
3851 | ||
3852 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
3853 | goto ok; | |
3854 | ||
3855 | gfc_find_symbol (current_ts.u.derived->name, | |
3856 | current_ts.u.derived->ns->parent, 1, &sym); | |
3857 | ||
3858 | /* Any symbol that we find had better be a type definition | |
3859 | which has its components defined. */ | |
3860 | if (sym != NULL && sym->attr.flavor == FL_DERIVED | |
3861 | && (current_ts.u.derived->components != NULL | |
3862 | || current_ts.u.derived->attr.zero_comp)) | |
3863 | goto ok; | |
3864 | ||
3865 | /* Now we have an error, which we signal, and then fix up | |
3866 | because the knock-on is plain and simple confusing. */ | |
3867 | gfc_error_now ("Derived type at %C has not been previously defined " | |
3868 | "and so cannot appear in a derived type definition"); | |
3869 | current_attr.pointer = 1; | |
3870 | goto ok; | |
3871 | } | |
3872 | ||
3873 | ok: | |
3874 | /* If we have an old-style character declaration, and no new-style | |
3875 | attribute specifications, then there a comma is optional between | |
3876 | the type specification and the variable list. */ | |
3877 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
3878 | gfc_match_char (','); | |
3879 | ||
3880 | /* Give the types/attributes to symbols that follow. Give the element | |
3881 | a number so that repeat character length expressions can be copied. */ | |
3882 | elem = 1; | |
3883 | for (;;) | |
3884 | { | |
3885 | num_idents_on_line++; | |
3886 | m = variable_decl (elem++); | |
3887 | if (m == MATCH_ERROR) | |
3888 | goto cleanup; | |
3889 | if (m == MATCH_NO) | |
3890 | break; | |
3891 | ||
3892 | if (gfc_match_eos () == MATCH_YES) | |
3893 | goto cleanup; | |
3894 | if (gfc_match_char (',') != MATCH_YES) | |
3895 | break; | |
3896 | } | |
3897 | ||
3898 | if (gfc_error_flag_test () == 0) | |
3899 | gfc_error ("Syntax error in data declaration at %C"); | |
3900 | m = MATCH_ERROR; | |
3901 | ||
3902 | gfc_free_data_all (gfc_current_ns); | |
3903 | ||
3904 | cleanup: | |
3905 | gfc_free_array_spec (current_as); | |
3906 | current_as = NULL; | |
3907 | return m; | |
3908 | } | |
3909 | ||
3910 | ||
3911 | /* Match a prefix associated with a function or subroutine | |
3912 | declaration. If the typespec pointer is nonnull, then a typespec | |
3913 | can be matched. Note that if nothing matches, MATCH_YES is | |
3914 | returned (the null string was matched). */ | |
3915 | ||
3916 | match | |
3917 | gfc_match_prefix (gfc_typespec *ts) | |
3918 | { | |
3919 | bool seen_type; | |
3920 | ||
3921 | gfc_clear_attr (¤t_attr); | |
3922 | seen_type = 0; | |
3923 | ||
3924 | gcc_assert (!gfc_matching_prefix); | |
3925 | gfc_matching_prefix = true; | |
3926 | ||
3927 | loop: | |
3928 | if (!seen_type && ts != NULL | |
3929 | && gfc_match_decl_type_spec (ts, 0) == MATCH_YES | |
3930 | && gfc_match_space () == MATCH_YES) | |
3931 | { | |
3932 | ||
3933 | seen_type = 1; | |
3934 | goto loop; | |
3935 | } | |
3936 | ||
3937 | if (gfc_match ("elemental% ") == MATCH_YES) | |
3938 | { | |
3939 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
3940 | goto error; | |
3941 | ||
3942 | goto loop; | |
3943 | } | |
3944 | ||
3945 | if (gfc_match ("pure% ") == MATCH_YES) | |
3946 | { | |
3947 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
3948 | goto error; | |
3949 | ||
3950 | goto loop; | |
3951 | } | |
3952 | ||
3953 | if (gfc_match ("recursive% ") == MATCH_YES) | |
3954 | { | |
3955 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
3956 | goto error; | |
3957 | ||
3958 | goto loop; | |
3959 | } | |
3960 | ||
3961 | /* At this point, the next item is not a prefix. */ | |
3962 | gcc_assert (gfc_matching_prefix); | |
3963 | gfc_matching_prefix = false; | |
3964 | return MATCH_YES; | |
3965 | ||
3966 | error: | |
3967 | gcc_assert (gfc_matching_prefix); | |
3968 | gfc_matching_prefix = false; | |
3969 | return MATCH_ERROR; | |
3970 | } | |
3971 | ||
3972 | ||
3973 | /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */ | |
3974 | ||
3975 | static gfc_try | |
3976 | copy_prefix (symbol_attribute *dest, locus *where) | |
3977 | { | |
3978 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) | |
3979 | return FAILURE; | |
3980 | ||
3981 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
3982 | return FAILURE; | |
3983 | ||
3984 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
3985 | return FAILURE; | |
3986 | ||
3987 | return SUCCESS; | |
3988 | } | |
3989 | ||
3990 | ||
3991 | /* Match a formal argument list. */ | |
3992 | ||
3993 | match | |
3994 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) | |
3995 | { | |
3996 | gfc_formal_arglist *head, *tail, *p, *q; | |
3997 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3998 | gfc_symbol *sym; | |
3999 | match m; | |
4000 | ||
4001 | head = tail = NULL; | |
4002 | ||
4003 | if (gfc_match_char ('(') != MATCH_YES) | |
4004 | { | |
4005 | if (null_flag) | |
4006 | goto ok; | |
4007 | return MATCH_NO; | |
4008 | } | |
4009 | ||
4010 | if (gfc_match_char (')') == MATCH_YES) | |
4011 | goto ok; | |
4012 | ||
4013 | for (;;) | |
4014 | { | |
4015 | if (gfc_match_char ('*') == MATCH_YES) | |
4016 | sym = NULL; | |
4017 | else | |
4018 | { | |
4019 | m = gfc_match_name (name); | |
4020 | if (m != MATCH_YES) | |
4021 | goto cleanup; | |
4022 | ||
4023 | if (gfc_get_symbol (name, NULL, &sym)) | |
4024 | goto cleanup; | |
4025 | } | |
4026 | ||
4027 | p = gfc_get_formal_arglist (); | |
4028 | ||
4029 | if (head == NULL) | |
4030 | head = tail = p; | |
4031 | else | |
4032 | { | |
4033 | tail->next = p; | |
4034 | tail = p; | |
4035 | } | |
4036 | ||
4037 | tail->sym = sym; | |
4038 | ||
4039 | /* We don't add the VARIABLE flavor because the name could be a | |
4040 | dummy procedure. We don't apply these attributes to formal | |
4041 | arguments of statement functions. */ | |
4042 | if (sym != NULL && !st_flag | |
4043 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE | |
4044 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) | |
4045 | { | |
4046 | m = MATCH_ERROR; | |
4047 | goto cleanup; | |
4048 | } | |
4049 | ||
4050 | /* The name of a program unit can be in a different namespace, | |
4051 | so check for it explicitly. After the statement is accepted, | |
4052 | the name is checked for especially in gfc_get_symbol(). */ | |
4053 | if (gfc_new_block != NULL && sym != NULL | |
4054 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
4055 | { | |
4056 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
4057 | sym->name); | |
4058 | m = MATCH_ERROR; | |
4059 | goto cleanup; | |
4060 | } | |
4061 | ||
4062 | if (gfc_match_char (')') == MATCH_YES) | |
4063 | goto ok; | |
4064 | ||
4065 | m = gfc_match_char (','); | |
4066 | if (m != MATCH_YES) | |
4067 | { | |
4068 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
4069 | goto cleanup; | |
4070 | } | |
4071 | } | |
4072 | ||
4073 | ok: | |
4074 | /* Check for duplicate symbols in the formal argument list. */ | |
4075 | if (head != NULL) | |
4076 | { | |
4077 | for (p = head; p->next; p = p->next) | |
4078 | { | |
4079 | if (p->sym == NULL) | |
4080 | continue; | |
4081 | ||
4082 | for (q = p->next; q; q = q->next) | |
4083 | if (p->sym == q->sym) | |
4084 | { | |
4085 | gfc_error ("Duplicate symbol '%s' in formal argument list " | |
4086 | "at %C", p->sym->name); | |
4087 | ||
4088 | m = MATCH_ERROR; | |
4089 | goto cleanup; | |
4090 | } | |
4091 | } | |
4092 | } | |
4093 | ||
4094 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) | |
4095 | == FAILURE) | |
4096 | { | |
4097 | m = MATCH_ERROR; | |
4098 | goto cleanup; | |
4099 | } | |
4100 | ||
4101 | return MATCH_YES; | |
4102 | ||
4103 | cleanup: | |
4104 | gfc_free_formal_arglist (head); | |
4105 | return m; | |
4106 | } | |
4107 | ||
4108 | ||
4109 | /* Match a RESULT specification following a function declaration or | |
4110 | ENTRY statement. Also matches the end-of-statement. */ | |
4111 | ||
4112 | static match | |
4113 | match_result (gfc_symbol *function, gfc_symbol **result) | |
4114 | { | |
4115 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4116 | gfc_symbol *r; | |
4117 | match m; | |
4118 | ||
4119 | if (gfc_match (" result (") != MATCH_YES) | |
4120 | return MATCH_NO; | |
4121 | ||
4122 | m = gfc_match_name (name); | |
4123 | if (m != MATCH_YES) | |
4124 | return m; | |
4125 | ||
4126 | /* Get the right paren, and that's it because there could be the | |
4127 | bind(c) attribute after the result clause. */ | |
4128 | if (gfc_match_char(')') != MATCH_YES) | |
4129 | { | |
4130 | /* TODO: should report the missing right paren here. */ | |
4131 | return MATCH_ERROR; | |
4132 | } | |
4133 | ||
4134 | if (strcmp (function->name, name) == 0) | |
4135 | { | |
4136 | gfc_error ("RESULT variable at %C must be different than function name"); | |
4137 | return MATCH_ERROR; | |
4138 | } | |
4139 | ||
4140 | if (gfc_get_symbol (name, NULL, &r)) | |
4141 | return MATCH_ERROR; | |
4142 | ||
4143 | if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE) | |
4144 | return MATCH_ERROR; | |
4145 | ||
4146 | *result = r; | |
4147 | ||
4148 | return MATCH_YES; | |
4149 | } | |
4150 | ||
4151 | ||
4152 | /* Match a function suffix, which could be a combination of a result | |
4153 | clause and BIND(C), either one, or neither. The draft does not | |
4154 | require them to come in a specific order. */ | |
4155 | ||
4156 | match | |
4157 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) | |
4158 | { | |
4159 | match is_bind_c; /* Found bind(c). */ | |
4160 | match is_result; /* Found result clause. */ | |
4161 | match found_match; /* Status of whether we've found a good match. */ | |
4162 | char peek_char; /* Character we're going to peek at. */ | |
4163 | bool allow_binding_name; | |
4164 | ||
4165 | /* Initialize to having found nothing. */ | |
4166 | found_match = MATCH_NO; | |
4167 | is_bind_c = MATCH_NO; | |
4168 | is_result = MATCH_NO; | |
4169 | ||
4170 | /* Get the next char to narrow between result and bind(c). */ | |
4171 | gfc_gobble_whitespace (); | |
4172 | peek_char = gfc_peek_ascii_char (); | |
4173 | ||
4174 | /* C binding names are not allowed for internal procedures. */ | |
4175 | if (gfc_current_state () == COMP_CONTAINS | |
4176 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
4177 | allow_binding_name = false; | |
4178 | else | |
4179 | allow_binding_name = true; | |
4180 | ||
4181 | switch (peek_char) | |
4182 | { | |
4183 | case 'r': | |
4184 | /* Look for result clause. */ | |
4185 | is_result = match_result (sym, result); | |
4186 | if (is_result == MATCH_YES) | |
4187 | { | |
4188 | /* Now see if there is a bind(c) after it. */ | |
4189 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); | |
4190 | /* We've found the result clause and possibly bind(c). */ | |
4191 | found_match = MATCH_YES; | |
4192 | } | |
4193 | else | |
4194 | /* This should only be MATCH_ERROR. */ | |
4195 | found_match = is_result; | |
4196 | break; | |
4197 | case 'b': | |
4198 | /* Look for bind(c) first. */ | |
4199 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); | |
4200 | if (is_bind_c == MATCH_YES) | |
4201 | { | |
4202 | /* Now see if a result clause followed it. */ | |
4203 | is_result = match_result (sym, result); | |
4204 | found_match = MATCH_YES; | |
4205 | } | |
4206 | else | |
4207 | { | |
4208 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ | |
4209 | found_match = MATCH_ERROR; | |
4210 | } | |
4211 | break; | |
4212 | default: | |
4213 | gfc_error ("Unexpected junk after function declaration at %C"); | |
4214 | found_match = MATCH_ERROR; | |
4215 | break; | |
4216 | } | |
4217 | ||
4218 | if (is_bind_c == MATCH_YES) | |
4219 | { | |
4220 | /* Fortran 2008 draft allows BIND(C) for internal procedures. */ | |
4221 | if (gfc_current_state () == COMP_CONTAINS | |
4222 | && sym->ns->proc_name->attr.flavor != FL_MODULE | |
4223 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " | |
4224 | "at %L may not be specified for an internal " | |
4225 | "procedure", &gfc_current_locus) | |
4226 | == FAILURE) | |
4227 | return MATCH_ERROR; | |
4228 | ||
4229 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) | |
4230 | == FAILURE) | |
4231 | return MATCH_ERROR; | |
4232 | } | |
4233 | ||
4234 | return found_match; | |
4235 | } | |
4236 | ||
4237 | ||
4238 | /* Procedure pointer return value without RESULT statement: | |
4239 | Add "hidden" result variable named "ppr@". */ | |
4240 | ||
4241 | static gfc_try | |
4242 | add_hidden_procptr_result (gfc_symbol *sym) | |
4243 | { | |
4244 | bool case1,case2; | |
4245 | ||
4246 | if (gfc_notification_std (GFC_STD_F2003) == ERROR) | |
4247 | return FAILURE; | |
4248 | ||
4249 | /* First usage case: PROCEDURE and EXTERNAL statements. */ | |
4250 | case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block () | |
4251 | && strcmp (gfc_current_block ()->name, sym->name) == 0 | |
4252 | && sym->attr.external; | |
4253 | /* Second usage case: INTERFACE statements. */ | |
4254 | case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous | |
4255 | && gfc_state_stack->previous->state == COMP_FUNCTION | |
4256 | && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0; | |
4257 | ||
4258 | if (case1 || case2) | |
4259 | { | |
4260 | gfc_symtree *stree; | |
4261 | if (case1) | |
4262 | gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false); | |
4263 | else if (case2) | |
4264 | { | |
4265 | gfc_symtree *st2; | |
4266 | gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false); | |
4267 | st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@"); | |
4268 | st2->n.sym = stree->n.sym; | |
4269 | } | |
4270 | sym->result = stree->n.sym; | |
4271 | ||
4272 | sym->result->attr.proc_pointer = sym->attr.proc_pointer; | |
4273 | sym->result->attr.pointer = sym->attr.pointer; | |
4274 | sym->result->attr.external = sym->attr.external; | |
4275 | sym->result->attr.referenced = sym->attr.referenced; | |
4276 | sym->result->ts = sym->ts; | |
4277 | sym->attr.proc_pointer = 0; | |
4278 | sym->attr.pointer = 0; | |
4279 | sym->attr.external = 0; | |
4280 | if (sym->result->attr.external && sym->result->attr.pointer) | |
4281 | { | |
4282 | sym->result->attr.pointer = 0; | |
4283 | sym->result->attr.proc_pointer = 1; | |
4284 | } | |
4285 | ||
4286 | return gfc_add_result (&sym->result->attr, sym->result->name, NULL); | |
4287 | } | |
4288 | /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */ | |
4289 | else if (sym->attr.function && !sym->attr.external && sym->attr.pointer | |
4290 | && sym->result && sym->result != sym && sym->result->attr.external | |
4291 | && sym == gfc_current_ns->proc_name | |
4292 | && sym == sym->result->ns->proc_name | |
4293 | && strcmp ("ppr@", sym->result->name) == 0) | |
4294 | { | |
4295 | sym->result->attr.proc_pointer = 1; | |
4296 | sym->attr.pointer = 0; | |
4297 | return SUCCESS; | |
4298 | } | |
4299 | else | |
4300 | return FAILURE; | |
4301 | } | |
4302 | ||
4303 | ||
4304 | /* Match the interface for a PROCEDURE declaration, | |
4305 | including brackets (R1212). */ | |
4306 | ||
4307 | static match | |
4308 | match_procedure_interface (gfc_symbol **proc_if) | |
4309 | { | |
4310 | match m; | |
4311 | gfc_symtree *st; | |
4312 | locus old_loc, entry_loc; | |
4313 | gfc_namespace *old_ns = gfc_current_ns; | |
4314 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4315 | ||
4316 | old_loc = entry_loc = gfc_current_locus; | |
4317 | gfc_clear_ts (¤t_ts); | |
4318 | ||
4319 | if (gfc_match (" (") != MATCH_YES) | |
4320 | { | |
4321 | gfc_current_locus = entry_loc; | |
4322 | return MATCH_NO; | |
4323 | } | |
4324 | ||
4325 | /* Get the type spec. for the procedure interface. */ | |
4326 | old_loc = gfc_current_locus; | |
4327 | m = gfc_match_decl_type_spec (¤t_ts, 0); | |
4328 | gfc_gobble_whitespace (); | |
4329 | if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')')) | |
4330 | goto got_ts; | |
4331 | ||
4332 | if (m == MATCH_ERROR) | |
4333 | return m; | |
4334 | ||
4335 | /* Procedure interface is itself a procedure. */ | |
4336 | gfc_current_locus = old_loc; | |
4337 | m = gfc_match_name (name); | |
4338 | ||
4339 | /* First look to see if it is already accessible in the current | |
4340 | namespace because it is use associated or contained. */ | |
4341 | st = NULL; | |
4342 | if (gfc_find_sym_tree (name, NULL, 0, &st)) | |
4343 | return MATCH_ERROR; | |
4344 | ||
4345 | /* If it is still not found, then try the parent namespace, if it | |
4346 | exists and create the symbol there if it is still not found. */ | |
4347 | if (gfc_current_ns->parent) | |
4348 | gfc_current_ns = gfc_current_ns->parent; | |
4349 | if (st == NULL && gfc_get_ha_sym_tree (name, &st)) | |
4350 | return MATCH_ERROR; | |
4351 | ||
4352 | gfc_current_ns = old_ns; | |
4353 | *proc_if = st->n.sym; | |
4354 | ||
4355 | /* Various interface checks. */ | |
4356 | if (*proc_if) | |
4357 | { | |
4358 | (*proc_if)->refs++; | |
4359 | /* Resolve interface if possible. That way, attr.procedure is only set | |
4360 | if it is declared by a later procedure-declaration-stmt, which is | |
4361 | invalid per C1212. */ | |
4362 | while ((*proc_if)->ts.interface) | |
4363 | *proc_if = (*proc_if)->ts.interface; | |
4364 | ||
4365 | if ((*proc_if)->generic) | |
4366 | { | |
4367 | gfc_error ("Interface '%s' at %C may not be generic", | |
4368 | (*proc_if)->name); | |
4369 | return MATCH_ERROR; | |
4370 | } | |
4371 | if ((*proc_if)->attr.proc == PROC_ST_FUNCTION) | |
4372 | { | |
4373 | gfc_error ("Interface '%s' at %C may not be a statement function", | |
4374 | (*proc_if)->name); | |
4375 | return MATCH_ERROR; | |
4376 | } | |
4377 | /* Handle intrinsic procedures. */ | |
4378 | if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc | |
4379 | || (*proc_if)->attr.if_source == IFSRC_IFBODY) | |
4380 | && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus) | |
4381 | || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus))) | |
4382 | (*proc_if)->attr.intrinsic = 1; | |
4383 | if ((*proc_if)->attr.intrinsic | |
4384 | && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0)) | |
4385 | { | |
4386 | gfc_error ("Intrinsic procedure '%s' not allowed " | |
4387 | "in PROCEDURE statement at %C", (*proc_if)->name); | |
4388 | return MATCH_ERROR; | |
4389 | } | |
4390 | } | |
4391 | ||
4392 | got_ts: | |
4393 | if (gfc_match (" )") != MATCH_YES) | |
4394 | { | |
4395 | gfc_current_locus = entry_loc; | |
4396 | return MATCH_NO; | |
4397 | } | |
4398 | ||
4399 | return MATCH_YES; | |
4400 | } | |
4401 | ||
4402 | ||
4403 | /* Match a PROCEDURE declaration (R1211). */ | |
4404 | ||
4405 | static match | |
4406 | match_procedure_decl (void) | |
4407 | { | |
4408 | match m; | |
4409 | gfc_symbol *sym, *proc_if = NULL; | |
4410 | int num; | |
4411 | gfc_expr *initializer = NULL; | |
4412 | ||
4413 | /* Parse interface (with brackets). */ | |
4414 | m = match_procedure_interface (&proc_if); | |
4415 | if (m != MATCH_YES) | |
4416 | return m; | |
4417 | ||
4418 | /* Parse attributes (with colons). */ | |
4419 | m = match_attr_spec(); | |
4420 | if (m == MATCH_ERROR) | |
4421 | return MATCH_ERROR; | |
4422 | ||
4423 | /* Get procedure symbols. */ | |
4424 | for(num=1;;num++) | |
4425 | { | |
4426 | m = gfc_match_symbol (&sym, 0); | |
4427 | if (m == MATCH_NO) | |
4428 | goto syntax; | |
4429 | else if (m == MATCH_ERROR) | |
4430 | return m; | |
4431 | ||
4432 | /* Add current_attr to the symbol attributes. */ | |
4433 | if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
4434 | return MATCH_ERROR; | |
4435 | ||
4436 | if (sym->attr.is_bind_c) | |
4437 | { | |
4438 | /* Check for C1218. */ | |
4439 | if (!proc_if || !proc_if->attr.is_bind_c) | |
4440 | { | |
4441 | gfc_error ("BIND(C) attribute at %C requires " | |
4442 | "an interface with BIND(C)"); | |
4443 | return MATCH_ERROR; | |
4444 | } | |
4445 | /* Check for C1217. */ | |
4446 | if (has_name_equals && sym->attr.pointer) | |
4447 | { | |
4448 | gfc_error ("BIND(C) procedure with NAME may not have " | |
4449 | "POINTER attribute at %C"); | |
4450 | return MATCH_ERROR; | |
4451 | } | |
4452 | if (has_name_equals && sym->attr.dummy) | |
4453 | { | |
4454 | gfc_error ("Dummy procedure at %C may not have " | |
4455 | "BIND(C) attribute with NAME"); | |
4456 | return MATCH_ERROR; | |
4457 | } | |
4458 | /* Set binding label for BIND(C). */ | |
4459 | if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS) | |
4460 | return MATCH_ERROR; | |
4461 | } | |
4462 | ||
4463 | if (gfc_add_external (&sym->attr, NULL) == FAILURE) | |
4464 | return MATCH_ERROR; | |
4465 | ||
4466 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4467 | sym = sym->result; | |
4468 | ||
4469 | if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE) | |
4470 | return MATCH_ERROR; | |
4471 | ||
4472 | /* Set interface. */ | |
4473 | if (proc_if != NULL) | |
4474 | { | |
4475 | if (sym->ts.type != BT_UNKNOWN) | |
4476 | { | |
4477 | gfc_error ("Procedure '%s' at %L already has basic type of %s", | |
4478 | sym->name, &gfc_current_locus, | |
4479 | gfc_basic_typename (sym->ts.type)); | |
4480 | return MATCH_ERROR; | |
4481 | } | |
4482 | sym->ts.interface = proc_if; | |
4483 | sym->attr.untyped = 1; | |
4484 | sym->attr.if_source = IFSRC_IFBODY; | |
4485 | } | |
4486 | else if (current_ts.type != BT_UNKNOWN) | |
4487 | { | |
4488 | if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) | |
4489 | return MATCH_ERROR; | |
4490 | sym->ts.interface = gfc_new_symbol ("", gfc_current_ns); | |
4491 | sym->ts.interface->ts = current_ts; | |
4492 | sym->ts.interface->attr.function = 1; | |
4493 | sym->attr.function = sym->ts.interface->attr.function; | |
4494 | sym->attr.if_source = IFSRC_UNKNOWN; | |
4495 | } | |
4496 | ||
4497 | if (gfc_match (" =>") == MATCH_YES) | |
4498 | { | |
4499 | if (!current_attr.pointer) | |
4500 | { | |
4501 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
4502 | m = MATCH_ERROR; | |
4503 | goto cleanup; | |
4504 | } | |
4505 | ||
4506 | m = gfc_match_null (&initializer); | |
4507 | if (m == MATCH_NO) | |
4508 | { | |
4509 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4510 | m = MATCH_ERROR; | |
4511 | } | |
4512 | ||
4513 | if (gfc_pure (NULL)) | |
4514 | { | |
4515 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4516 | "a PURE procedure"); | |
4517 | m = MATCH_ERROR; | |
4518 | } | |
4519 | ||
4520 | if (m != MATCH_YES) | |
4521 | goto cleanup; | |
4522 | ||
4523 | if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus) | |
4524 | != SUCCESS) | |
4525 | goto cleanup; | |
4526 | ||
4527 | } | |
4528 | ||
4529 | gfc_set_sym_referenced (sym); | |
4530 | ||
4531 | if (gfc_match_eos () == MATCH_YES) | |
4532 | return MATCH_YES; | |
4533 | if (gfc_match_char (',') != MATCH_YES) | |
4534 | goto syntax; | |
4535 | } | |
4536 | ||
4537 | syntax: | |
4538 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4539 | return MATCH_ERROR; | |
4540 | ||
4541 | cleanup: | |
4542 | /* Free stuff up and return. */ | |
4543 | gfc_free_expr (initializer); | |
4544 | return m; | |
4545 | } | |
4546 | ||
4547 | ||
4548 | static match | |
4549 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc); | |
4550 | ||
4551 | ||
4552 | /* Match a procedure pointer component declaration (R445). */ | |
4553 | ||
4554 | static match | |
4555 | match_ppc_decl (void) | |
4556 | { | |
4557 | match m; | |
4558 | gfc_symbol *proc_if = NULL; | |
4559 | gfc_typespec ts; | |
4560 | int num; | |
4561 | gfc_component *c; | |
4562 | gfc_expr *initializer = NULL; | |
4563 | gfc_typebound_proc* tb; | |
4564 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4565 | ||
4566 | /* Parse interface (with brackets). */ | |
4567 | m = match_procedure_interface (&proc_if); | |
4568 | if (m != MATCH_YES) | |
4569 | goto syntax; | |
4570 | ||
4571 | /* Parse attributes. */ | |
4572 | tb = XCNEW (gfc_typebound_proc); | |
4573 | tb->where = gfc_current_locus; | |
4574 | m = match_binding_attributes (tb, false, true); | |
4575 | if (m == MATCH_ERROR) | |
4576 | return m; | |
4577 | ||
4578 | gfc_clear_attr (¤t_attr); | |
4579 | current_attr.procedure = 1; | |
4580 | current_attr.proc_pointer = 1; | |
4581 | current_attr.access = tb->access; | |
4582 | current_attr.flavor = FL_PROCEDURE; | |
4583 | ||
4584 | /* Match the colons (required). */ | |
4585 | if (gfc_match (" ::") != MATCH_YES) | |
4586 | { | |
4587 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
4588 | return MATCH_ERROR; | |
4589 | } | |
4590 | ||
4591 | /* Check for C450. */ | |
4592 | if (!tb->nopass && proc_if == NULL) | |
4593 | { | |
4594 | gfc_error("NOPASS or explicit interface required at %C"); | |
4595 | return MATCH_ERROR; | |
4596 | } | |
4597 | ||
4598 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Procedure pointer " | |
4599 | "component at %C") == FAILURE) | |
4600 | return MATCH_ERROR; | |
4601 | ||
4602 | /* Match PPC names. */ | |
4603 | ts = current_ts; | |
4604 | for(num=1;;num++) | |
4605 | { | |
4606 | m = gfc_match_name (name); | |
4607 | if (m == MATCH_NO) | |
4608 | goto syntax; | |
4609 | else if (m == MATCH_ERROR) | |
4610 | return m; | |
4611 | ||
4612 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
4613 | return MATCH_ERROR; | |
4614 | ||
4615 | /* Add current_attr to the symbol attributes. */ | |
4616 | if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE) | |
4617 | return MATCH_ERROR; | |
4618 | ||
4619 | if (gfc_add_external (&c->attr, NULL) == FAILURE) | |
4620 | return MATCH_ERROR; | |
4621 | ||
4622 | if (gfc_add_proc (&c->attr, name, NULL) == FAILURE) | |
4623 | return MATCH_ERROR; | |
4624 | ||
4625 | c->tb = tb; | |
4626 | ||
4627 | /* Set interface. */ | |
4628 | if (proc_if != NULL) | |
4629 | { | |
4630 | c->ts.interface = proc_if; | |
4631 | c->attr.untyped = 1; | |
4632 | c->attr.if_source = IFSRC_IFBODY; | |
4633 | } | |
4634 | else if (ts.type != BT_UNKNOWN) | |
4635 | { | |
4636 | c->ts = ts; | |
4637 | c->ts.interface = gfc_new_symbol ("", gfc_current_ns); | |
4638 | c->ts.interface->ts = ts; | |
4639 | c->ts.interface->attr.function = 1; | |
4640 | c->attr.function = c->ts.interface->attr.function; | |
4641 | c->attr.if_source = IFSRC_UNKNOWN; | |
4642 | } | |
4643 | ||
4644 | if (gfc_match (" =>") == MATCH_YES) | |
4645 | { | |
4646 | m = gfc_match_null (&initializer); | |
4647 | if (m == MATCH_NO) | |
4648 | { | |
4649 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4650 | m = MATCH_ERROR; | |
4651 | } | |
4652 | if (gfc_pure (NULL)) | |
4653 | { | |
4654 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4655 | "a PURE procedure"); | |
4656 | m = MATCH_ERROR; | |
4657 | } | |
4658 | if (m != MATCH_YES) | |
4659 | { | |
4660 | gfc_free_expr (initializer); | |
4661 | return m; | |
4662 | } | |
4663 | c->initializer = initializer; | |
4664 | } | |
4665 | ||
4666 | if (gfc_match_eos () == MATCH_YES) | |
4667 | return MATCH_YES; | |
4668 | if (gfc_match_char (',') != MATCH_YES) | |
4669 | goto syntax; | |
4670 | } | |
4671 | ||
4672 | syntax: | |
4673 | gfc_error ("Syntax error in procedure pointer component at %C"); | |
4674 | return MATCH_ERROR; | |
4675 | } | |
4676 | ||
4677 | ||
4678 | /* Match a PROCEDURE declaration inside an interface (R1206). */ | |
4679 | ||
4680 | static match | |
4681 | match_procedure_in_interface (void) | |
4682 | { | |
4683 | match m; | |
4684 | gfc_symbol *sym; | |
4685 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4686 | ||
4687 | if (current_interface.type == INTERFACE_NAMELESS | |
4688 | || current_interface.type == INTERFACE_ABSTRACT) | |
4689 | { | |
4690 | gfc_error ("PROCEDURE at %C must be in a generic interface"); | |
4691 | return MATCH_ERROR; | |
4692 | } | |
4693 | ||
4694 | for(;;) | |
4695 | { | |
4696 | m = gfc_match_name (name); | |
4697 | if (m == MATCH_NO) | |
4698 | goto syntax; | |
4699 | else if (m == MATCH_ERROR) | |
4700 | return m; | |
4701 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
4702 | return MATCH_ERROR; | |
4703 | ||
4704 | if (gfc_add_interface (sym) == FAILURE) | |
4705 | return MATCH_ERROR; | |
4706 | ||
4707 | if (gfc_match_eos () == MATCH_YES) | |
4708 | break; | |
4709 | if (gfc_match_char (',') != MATCH_YES) | |
4710 | goto syntax; | |
4711 | } | |
4712 | ||
4713 | return MATCH_YES; | |
4714 | ||
4715 | syntax: | |
4716 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4717 | return MATCH_ERROR; | |
4718 | } | |
4719 | ||
4720 | ||
4721 | /* General matcher for PROCEDURE declarations. */ | |
4722 | ||
4723 | static match match_procedure_in_type (void); | |
4724 | ||
4725 | match | |
4726 | gfc_match_procedure (void) | |
4727 | { | |
4728 | match m; | |
4729 | ||
4730 | switch (gfc_current_state ()) | |
4731 | { | |
4732 | case COMP_NONE: | |
4733 | case COMP_PROGRAM: | |
4734 | case COMP_MODULE: | |
4735 | case COMP_SUBROUTINE: | |
4736 | case COMP_FUNCTION: | |
4737 | m = match_procedure_decl (); | |
4738 | break; | |
4739 | case COMP_INTERFACE: | |
4740 | m = match_procedure_in_interface (); | |
4741 | break; | |
4742 | case COMP_DERIVED: | |
4743 | m = match_ppc_decl (); | |
4744 | break; | |
4745 | case COMP_DERIVED_CONTAINS: | |
4746 | m = match_procedure_in_type (); | |
4747 | break; | |
4748 | default: | |
4749 | return MATCH_NO; | |
4750 | } | |
4751 | ||
4752 | if (m != MATCH_YES) | |
4753 | return m; | |
4754 | ||
4755 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C") | |
4756 | == FAILURE) | |
4757 | return MATCH_ERROR; | |
4758 | ||
4759 | return m; | |
4760 | } | |
4761 | ||
4762 | ||
4763 | /* Warn if a matched procedure has the same name as an intrinsic; this is | |
4764 | simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current | |
4765 | parser-state-stack to find out whether we're in a module. */ | |
4766 | ||
4767 | static void | |
4768 | warn_intrinsic_shadow (const gfc_symbol* sym, bool func) | |
4769 | { | |
4770 | bool in_module; | |
4771 | ||
4772 | in_module = (gfc_state_stack->previous | |
4773 | && gfc_state_stack->previous->state == COMP_MODULE); | |
4774 | ||
4775 | gfc_warn_intrinsic_shadow (sym, in_module, func); | |
4776 | } | |
4777 | ||
4778 | ||
4779 | /* Match a function declaration. */ | |
4780 | ||
4781 | match | |
4782 | gfc_match_function_decl (void) | |
4783 | { | |
4784 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4785 | gfc_symbol *sym, *result; | |
4786 | locus old_loc; | |
4787 | match m; | |
4788 | match suffix_match; | |
4789 | match found_match; /* Status returned by match func. */ | |
4790 | ||
4791 | if (gfc_current_state () != COMP_NONE | |
4792 | && gfc_current_state () != COMP_INTERFACE | |
4793 | && gfc_current_state () != COMP_CONTAINS) | |
4794 | return MATCH_NO; | |
4795 | ||
4796 | gfc_clear_ts (¤t_ts); | |
4797 | ||
4798 | old_loc = gfc_current_locus; | |
4799 | ||
4800 | m = gfc_match_prefix (¤t_ts); | |
4801 | if (m != MATCH_YES) | |
4802 | { | |
4803 | gfc_current_locus = old_loc; | |
4804 | return m; | |
4805 | } | |
4806 | ||
4807 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
4808 | { | |
4809 | gfc_current_locus = old_loc; | |
4810 | return MATCH_NO; | |
4811 | } | |
4812 | if (get_proc_name (name, &sym, false)) | |
4813 | return MATCH_ERROR; | |
4814 | ||
4815 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4816 | sym = sym->result; | |
4817 | ||
4818 | gfc_new_block = sym; | |
4819 | ||
4820 | m = gfc_match_formal_arglist (sym, 0, 0); | |
4821 | if (m == MATCH_NO) | |
4822 | { | |
4823 | gfc_error ("Expected formal argument list in function " | |
4824 | "definition at %C"); | |
4825 | m = MATCH_ERROR; | |
4826 | goto cleanup; | |
4827 | } | |
4828 | else if (m == MATCH_ERROR) | |
4829 | goto cleanup; | |
4830 | ||
4831 | result = NULL; | |
4832 | ||
4833 | /* According to the draft, the bind(c) and result clause can | |
4834 | come in either order after the formal_arg_list (i.e., either | |
4835 | can be first, both can exist together or by themselves or neither | |
4836 | one). Therefore, the match_result can't match the end of the | |
4837 | string, and check for the bind(c) or result clause in either order. */ | |
4838 | found_match = gfc_match_eos (); | |
4839 | ||
4840 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
4841 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4842 | not allowed for procedures. */ | |
4843 | if (sym->attr.is_bind_c == 1) | |
4844 | { | |
4845 | sym->attr.is_bind_c = 0; | |
4846 | if (sym->old_symbol != NULL) | |
4847 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4848 | "variables or common blocks", | |
4849 | &(sym->old_symbol->declared_at)); | |
4850 | else | |
4851 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4852 | "variables or common blocks", &gfc_current_locus); | |
4853 | } | |
4854 | ||
4855 | if (found_match != MATCH_YES) | |
4856 | { | |
4857 | /* If we haven't found the end-of-statement, look for a suffix. */ | |
4858 | suffix_match = gfc_match_suffix (sym, &result); | |
4859 | if (suffix_match == MATCH_YES) | |
4860 | /* Need to get the eos now. */ | |
4861 | found_match = gfc_match_eos (); | |
4862 | else | |
4863 | found_match = suffix_match; | |
4864 | } | |
4865 | ||
4866 | if(found_match != MATCH_YES) | |
4867 | m = MATCH_ERROR; | |
4868 | else | |
4869 | { | |
4870 | /* Make changes to the symbol. */ | |
4871 | m = MATCH_ERROR; | |
4872 | ||
4873 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) | |
4874 | goto cleanup; | |
4875 | ||
4876 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
4877 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4878 | goto cleanup; | |
4879 | ||
4880 | /* Delay matching the function characteristics until after the | |
4881 | specification block by signalling kind=-1. */ | |
4882 | sym->declared_at = old_loc; | |
4883 | if (current_ts.type != BT_UNKNOWN) | |
4884 | current_ts.kind = -1; | |
4885 | else | |
4886 | current_ts.kind = 0; | |
4887 | ||
4888 | if (result == NULL) | |
4889 | { | |
4890 | if (current_ts.type != BT_UNKNOWN | |
4891 | && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) | |
4892 | goto cleanup; | |
4893 | sym->result = sym; | |
4894 | } | |
4895 | else | |
4896 | { | |
4897 | if (current_ts.type != BT_UNKNOWN | |
4898 | && gfc_add_type (result, ¤t_ts, &gfc_current_locus) | |
4899 | == FAILURE) | |
4900 | goto cleanup; | |
4901 | sym->result = result; | |
4902 | } | |
4903 | ||
4904 | /* Warn if this procedure has the same name as an intrinsic. */ | |
4905 | warn_intrinsic_shadow (sym, true); | |
4906 | ||
4907 | return MATCH_YES; | |
4908 | } | |
4909 | ||
4910 | cleanup: | |
4911 | gfc_current_locus = old_loc; | |
4912 | return m; | |
4913 | } | |
4914 | ||
4915 | ||
4916 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
4917 | pass the name of the entry, rather than the gfc_current_block name, and | |
4918 | to return false upon finding an existing global entry. */ | |
4919 | ||
4920 | static bool | |
4921 | add_global_entry (const char *name, int sub) | |
4922 | { | |
4923 | gfc_gsymbol *s; | |
4924 | enum gfc_symbol_type type; | |
4925 | ||
4926 | s = gfc_get_gsymbol(name); | |
4927 | type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; | |
4928 | ||
4929 | if (s->defined | |
4930 | || (s->type != GSYM_UNKNOWN | |
4931 | && s->type != type)) | |
4932 | gfc_global_used(s, NULL); | |
4933 | else | |
4934 | { | |
4935 | s->type = type; | |
4936 | s->where = gfc_current_locus; | |
4937 | s->defined = 1; | |
4938 | s->ns = gfc_current_ns; | |
4939 | return true; | |
4940 | } | |
4941 | return false; | |
4942 | } | |
4943 | ||
4944 | ||
4945 | /* Match an ENTRY statement. */ | |
4946 | ||
4947 | match | |
4948 | gfc_match_entry (void) | |
4949 | { | |
4950 | gfc_symbol *proc; | |
4951 | gfc_symbol *result; | |
4952 | gfc_symbol *entry; | |
4953 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4954 | gfc_compile_state state; | |
4955 | match m; | |
4956 | gfc_entry_list *el; | |
4957 | locus old_loc; | |
4958 | bool module_procedure; | |
4959 | char peek_char; | |
4960 | match is_bind_c; | |
4961 | ||
4962 | m = gfc_match_name (name); | |
4963 | if (m != MATCH_YES) | |
4964 | return m; | |
4965 | ||
4966 | if (gfc_notify_std (GFC_STD_F2008_OBS, "Fortran 2008 obsolescent feature: " | |
4967 | "ENTRY statement at %C") == FAILURE) | |
4968 | return MATCH_ERROR; | |
4969 | ||
4970 | state = gfc_current_state (); | |
4971 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) | |
4972 | { | |
4973 | switch (state) | |
4974 | { | |
4975 | case COMP_PROGRAM: | |
4976 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
4977 | break; | |
4978 | case COMP_MODULE: | |
4979 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
4980 | break; | |
4981 | case COMP_BLOCK_DATA: | |
4982 | gfc_error ("ENTRY statement at %C cannot appear within " | |
4983 | "a BLOCK DATA"); | |
4984 | break; | |
4985 | case COMP_INTERFACE: | |
4986 | gfc_error ("ENTRY statement at %C cannot appear within " | |
4987 | "an INTERFACE"); | |
4988 | break; | |
4989 | case COMP_DERIVED: | |
4990 | gfc_error ("ENTRY statement at %C cannot appear within " | |
4991 | "a DERIVED TYPE block"); | |
4992 | break; | |
4993 | case COMP_IF: | |
4994 | gfc_error ("ENTRY statement at %C cannot appear within " | |
4995 | "an IF-THEN block"); | |
4996 | break; | |
4997 | case COMP_DO: | |
4998 | gfc_error ("ENTRY statement at %C cannot appear within " | |
4999 | "a DO block"); | |
5000 | break; | |
5001 | case COMP_SELECT: | |
5002 | gfc_error ("ENTRY statement at %C cannot appear within " | |
5003 | "a SELECT block"); | |
5004 | break; | |
5005 | case COMP_FORALL: | |
5006 | gfc_error ("ENTRY statement at %C cannot appear within " | |
5007 | "a FORALL block"); | |
5008 | break; | |
5009 | case COMP_WHERE: | |
5010 | gfc_error ("ENTRY statement at %C cannot appear within " | |
5011 | "a WHERE block"); | |
5012 | break; | |
5013 | case COMP_CONTAINS: | |
5014 | gfc_error ("ENTRY statement at %C cannot appear within " | |
5015 | "a contained subprogram"); | |
5016 | break; | |
5017 | default: | |
5018 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
5019 | } | |
5020 | return MATCH_ERROR; | |
5021 | } | |
5022 | ||
5023 | module_procedure = gfc_current_ns->parent != NULL | |
5024 | && gfc_current_ns->parent->proc_name | |
5025 | && gfc_current_ns->parent->proc_name->attr.flavor | |
5026 | == FL_MODULE; | |
5027 | ||
5028 | if (gfc_current_ns->parent != NULL | |
5029 | && gfc_current_ns->parent->proc_name | |
5030 | && !module_procedure) | |
5031 | { | |
5032 | gfc_error("ENTRY statement at %C cannot appear in a " | |
5033 | "contained procedure"); | |
5034 | return MATCH_ERROR; | |
5035 | } | |
5036 | ||
5037 | /* Module function entries need special care in get_proc_name | |
5038 | because previous references within the function will have | |
5039 | created symbols attached to the current namespace. */ | |
5040 | if (get_proc_name (name, &entry, | |
5041 | gfc_current_ns->parent != NULL | |
5042 | && module_procedure)) | |
5043 | return MATCH_ERROR; | |
5044 | ||
5045 | proc = gfc_current_block (); | |
5046 | ||
5047 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
5048 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
5049 | not allowed for procedures. */ | |
5050 | if (entry->attr.is_bind_c == 1) | |
5051 | { | |
5052 | entry->attr.is_bind_c = 0; | |
5053 | if (entry->old_symbol != NULL) | |
5054 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5055 | "variables or common blocks", | |
5056 | &(entry->old_symbol->declared_at)); | |
5057 | else | |
5058 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5059 | "variables or common blocks", &gfc_current_locus); | |
5060 | } | |
5061 | ||
5062 | /* Check what next non-whitespace character is so we can tell if there | |
5063 | is the required parens if we have a BIND(C). */ | |
5064 | gfc_gobble_whitespace (); | |
5065 | peek_char = gfc_peek_ascii_char (); | |
5066 | ||
5067 | if (state == COMP_SUBROUTINE) | |
5068 | { | |
5069 | /* An entry in a subroutine. */ | |
5070 | if (!gfc_current_ns->parent && !add_global_entry (name, 1)) | |
5071 | return MATCH_ERROR; | |
5072 | ||
5073 | m = gfc_match_formal_arglist (entry, 0, 1); | |
5074 | if (m != MATCH_YES) | |
5075 | return MATCH_ERROR; | |
5076 | ||
5077 | /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can | |
5078 | never be an internal procedure. */ | |
5079 | is_bind_c = gfc_match_bind_c (entry, true); | |
5080 | if (is_bind_c == MATCH_ERROR) | |
5081 | return MATCH_ERROR; | |
5082 | if (is_bind_c == MATCH_YES) | |
5083 | { | |
5084 | if (peek_char != '(') | |
5085 | { | |
5086 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
5087 | return MATCH_ERROR; | |
5088 | } | |
5089 | if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1) | |
5090 | == FAILURE) | |
5091 | return MATCH_ERROR; | |
5092 | } | |
5093 | ||
5094 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE | |
5095 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
5096 | return MATCH_ERROR; | |
5097 | } | |
5098 | else | |
5099 | { | |
5100 | /* An entry in a function. | |
5101 | We need to take special care because writing | |
5102 | ENTRY f() | |
5103 | as | |
5104 | ENTRY f | |
5105 | is allowed, whereas | |
5106 | ENTRY f() RESULT (r) | |
5107 | can't be written as | |
5108 | ENTRY f RESULT (r). */ | |
5109 | if (!gfc_current_ns->parent && !add_global_entry (name, 0)) | |
5110 | return MATCH_ERROR; | |
5111 | ||
5112 | old_loc = gfc_current_locus; | |
5113 | if (gfc_match_eos () == MATCH_YES) | |
5114 | { | |
5115 | gfc_current_locus = old_loc; | |
5116 | /* Match the empty argument list, and add the interface to | |
5117 | the symbol. */ | |
5118 | m = gfc_match_formal_arglist (entry, 0, 1); | |
5119 | } | |
5120 | else | |
5121 | m = gfc_match_formal_arglist (entry, 0, 0); | |
5122 | ||
5123 | if (m != MATCH_YES) | |
5124 | return MATCH_ERROR; | |
5125 | ||
5126 | result = NULL; | |
5127 | ||
5128 | if (gfc_match_eos () == MATCH_YES) | |
5129 | { | |
5130 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE | |
5131 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
5132 | return MATCH_ERROR; | |
5133 | ||
5134 | entry->result = entry; | |
5135 | } | |
5136 | else | |
5137 | { | |
5138 | m = gfc_match_suffix (entry, &result); | |
5139 | if (m == MATCH_NO) | |
5140 | gfc_syntax_error (ST_ENTRY); | |
5141 | if (m != MATCH_YES) | |
5142 | return MATCH_ERROR; | |
5143 | ||
5144 | if (result) | |
5145 | { | |
5146 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE | |
5147 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
5148 | || gfc_add_function (&entry->attr, result->name, NULL) | |
5149 | == FAILURE) | |
5150 | return MATCH_ERROR; | |
5151 | entry->result = result; | |
5152 | } | |
5153 | else | |
5154 | { | |
5155 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE | |
5156 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
5157 | return MATCH_ERROR; | |
5158 | entry->result = entry; | |
5159 | } | |
5160 | } | |
5161 | } | |
5162 | ||
5163 | if (gfc_match_eos () != MATCH_YES) | |
5164 | { | |
5165 | gfc_syntax_error (ST_ENTRY); | |
5166 | return MATCH_ERROR; | |
5167 | } | |
5168 | ||
5169 | entry->attr.recursive = proc->attr.recursive; | |
5170 | entry->attr.elemental = proc->attr.elemental; | |
5171 | entry->attr.pure = proc->attr.pure; | |
5172 | ||
5173 | el = gfc_get_entry_list (); | |
5174 | el->sym = entry; | |
5175 | el->next = gfc_current_ns->entries; | |
5176 | gfc_current_ns->entries = el; | |
5177 | if (el->next) | |
5178 | el->id = el->next->id + 1; | |
5179 | else | |
5180 | el->id = 1; | |
5181 | ||
5182 | new_st.op = EXEC_ENTRY; | |
5183 | new_st.ext.entry = el; | |
5184 | ||
5185 | return MATCH_YES; | |
5186 | } | |
5187 | ||
5188 | ||
5189 | /* Match a subroutine statement, including optional prefixes. */ | |
5190 | ||
5191 | match | |
5192 | gfc_match_subroutine (void) | |
5193 | { | |
5194 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5195 | gfc_symbol *sym; | |
5196 | match m; | |
5197 | match is_bind_c; | |
5198 | char peek_char; | |
5199 | bool allow_binding_name; | |
5200 | ||
5201 | if (gfc_current_state () != COMP_NONE | |
5202 | && gfc_current_state () != COMP_INTERFACE | |
5203 | && gfc_current_state () != COMP_CONTAINS) | |
5204 | return MATCH_NO; | |
5205 | ||
5206 | m = gfc_match_prefix (NULL); | |
5207 | if (m != MATCH_YES) | |
5208 | return m; | |
5209 | ||
5210 | m = gfc_match ("subroutine% %n", name); | |
5211 | if (m != MATCH_YES) | |
5212 | return m; | |
5213 | ||
5214 | if (get_proc_name (name, &sym, false)) | |
5215 | return MATCH_ERROR; | |
5216 | ||
5217 | /* Set declared_at as it might point to, e.g., a PUBLIC statement, if | |
5218 | the symbol existed before. */ | |
5219 | sym->declared_at = gfc_current_locus; | |
5220 | ||
5221 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
5222 | sym = sym->result; | |
5223 | ||
5224 | gfc_new_block = sym; | |
5225 | ||
5226 | /* Check what next non-whitespace character is so we can tell if there | |
5227 | is the required parens if we have a BIND(C). */ | |
5228 | gfc_gobble_whitespace (); | |
5229 | peek_char = gfc_peek_ascii_char (); | |
5230 | ||
5231 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) | |
5232 | return MATCH_ERROR; | |
5233 | ||
5234 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
5235 | return MATCH_ERROR; | |
5236 | ||
5237 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
5238 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
5239 | not allowed for procedures. */ | |
5240 | if (sym->attr.is_bind_c == 1) | |
5241 | { | |
5242 | sym->attr.is_bind_c = 0; | |
5243 | if (sym->old_symbol != NULL) | |
5244 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5245 | "variables or common blocks", | |
5246 | &(sym->old_symbol->declared_at)); | |
5247 | else | |
5248 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5249 | "variables or common blocks", &gfc_current_locus); | |
5250 | } | |
5251 | ||
5252 | /* C binding names are not allowed for internal procedures. */ | |
5253 | if (gfc_current_state () == COMP_CONTAINS | |
5254 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
5255 | allow_binding_name = false; | |
5256 | else | |
5257 | allow_binding_name = true; | |
5258 | ||
5259 | /* Here, we are just checking if it has the bind(c) attribute, and if | |
5260 | so, then we need to make sure it's all correct. If it doesn't, | |
5261 | we still need to continue matching the rest of the subroutine line. */ | |
5262 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); | |
5263 | if (is_bind_c == MATCH_ERROR) | |
5264 | { | |
5265 | /* There was an attempt at the bind(c), but it was wrong. An | |
5266 | error message should have been printed w/in the gfc_match_bind_c | |
5267 | so here we'll just return the MATCH_ERROR. */ | |
5268 | return MATCH_ERROR; | |
5269 | } | |
5270 | ||
5271 | if (is_bind_c == MATCH_YES) | |
5272 | { | |
5273 | /* The following is allowed in the Fortran 2008 draft. */ | |
5274 | if (gfc_current_state () == COMP_CONTAINS | |
5275 | && sym->ns->proc_name->attr.flavor != FL_MODULE | |
5276 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " | |
5277 | "at %L may not be specified for an internal " | |
5278 | "procedure", &gfc_current_locus) | |
5279 | == FAILURE) | |
5280 | return MATCH_ERROR; | |
5281 | ||
5282 | if (peek_char != '(') | |
5283 | { | |
5284 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
5285 | return MATCH_ERROR; | |
5286 | } | |
5287 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) | |
5288 | == FAILURE) | |
5289 | return MATCH_ERROR; | |
5290 | } | |
5291 | ||
5292 | if (gfc_match_eos () != MATCH_YES) | |
5293 | { | |
5294 | gfc_syntax_error (ST_SUBROUTINE); | |
5295 | return MATCH_ERROR; | |
5296 | } | |
5297 | ||
5298 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
5299 | return MATCH_ERROR; | |
5300 | ||
5301 | /* Warn if it has the same name as an intrinsic. */ | |
5302 | warn_intrinsic_shadow (sym, false); | |
5303 | ||
5304 | return MATCH_YES; | |
5305 | } | |
5306 | ||
5307 | ||
5308 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if | |
5309 | given, and set the binding label in either the given symbol (if not | |
5310 | NULL), or in the current_ts. The symbol may be NULL because we may | |
5311 | encounter the BIND(C) before the declaration itself. Return | |
5312 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, | |
5313 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, | |
5314 | or MATCH_YES if the specifier was correct and the binding label and | |
5315 | bind(c) fields were set correctly for the given symbol or the | |
5316 | current_ts. If allow_binding_name is false, no binding name may be | |
5317 | given. */ | |
5318 | ||
5319 | match | |
5320 | gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name) | |
5321 | { | |
5322 | /* binding label, if exists */ | |
5323 | char binding_label[GFC_MAX_SYMBOL_LEN + 1]; | |
5324 | match double_quote; | |
5325 | match single_quote; | |
5326 | ||
5327 | /* Initialize the flag that specifies whether we encountered a NAME= | |
5328 | specifier or not. */ | |
5329 | has_name_equals = 0; | |
5330 | ||
5331 | /* Init the first char to nil so we can catch if we don't have | |
5332 | the label (name attr) or the symbol name yet. */ | |
5333 | binding_label[0] = '\0'; | |
5334 | ||
5335 | /* This much we have to be able to match, in this order, if | |
5336 | there is a bind(c) label. */ | |
5337 | if (gfc_match (" bind ( c ") != MATCH_YES) | |
5338 | return MATCH_NO; | |
5339 | ||
5340 | /* Now see if there is a binding label, or if we've reached the | |
5341 | end of the bind(c) attribute without one. */ | |
5342 | if (gfc_match_char (',') == MATCH_YES) | |
5343 | { | |
5344 | if (gfc_match (" name = ") != MATCH_YES) | |
5345 | { | |
5346 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5347 | "at %C"); | |
5348 | /* should give an error message here */ | |
5349 | return MATCH_ERROR; | |
5350 | } | |
5351 | ||
5352 | has_name_equals = 1; | |
5353 | ||
5354 | /* Get the opening quote. */ | |
5355 | double_quote = MATCH_YES; | |
5356 | single_quote = MATCH_YES; | |
5357 | double_quote = gfc_match_char ('"'); | |
5358 | if (double_quote != MATCH_YES) | |
5359 | single_quote = gfc_match_char ('\''); | |
5360 | if (double_quote != MATCH_YES && single_quote != MATCH_YES) | |
5361 | { | |
5362 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5363 | "at %C"); | |
5364 | return MATCH_ERROR; | |
5365 | } | |
5366 | ||
5367 | /* Grab the binding label, using functions that will not lower | |
5368 | case the names automatically. */ | |
5369 | if (gfc_match_name_C (binding_label) != MATCH_YES) | |
5370 | return MATCH_ERROR; | |
5371 | ||
5372 | /* Get the closing quotation. */ | |
5373 | if (double_quote == MATCH_YES) | |
5374 | { | |
5375 | if (gfc_match_char ('"') != MATCH_YES) | |
5376 | { | |
5377 | gfc_error ("Missing closing quote '\"' for binding label at %C"); | |
5378 | /* User started string with '"' so looked to match it. */ | |
5379 | return MATCH_ERROR; | |
5380 | } | |
5381 | } | |
5382 | else | |
5383 | { | |
5384 | if (gfc_match_char ('\'') != MATCH_YES) | |
5385 | { | |
5386 | gfc_error ("Missing closing quote '\'' for binding label at %C"); | |
5387 | /* User started string with "'" char. */ | |
5388 | return MATCH_ERROR; | |
5389 | } | |
5390 | } | |
5391 | } | |
5392 | ||
5393 | /* Get the required right paren. */ | |
5394 | if (gfc_match_char (')') != MATCH_YES) | |
5395 | { | |
5396 | gfc_error ("Missing closing paren for binding label at %C"); | |
5397 | return MATCH_ERROR; | |
5398 | } | |
5399 | ||
5400 | if (has_name_equals && !allow_binding_name) | |
5401 | { | |
5402 | gfc_error ("No binding name is allowed in BIND(C) at %C"); | |
5403 | return MATCH_ERROR; | |
5404 | } | |
5405 | ||
5406 | if (has_name_equals && sym != NULL && sym->attr.dummy) | |
5407 | { | |
5408 | gfc_error ("For dummy procedure %s, no binding name is " | |
5409 | "allowed in BIND(C) at %C", sym->name); | |
5410 | return MATCH_ERROR; | |
5411 | } | |
5412 | ||
5413 | ||
5414 | /* Save the binding label to the symbol. If sym is null, we're | |
5415 | probably matching the typespec attributes of a declaration and | |
5416 | haven't gotten the name yet, and therefore, no symbol yet. */ | |
5417 | if (binding_label[0] != '\0') | |
5418 | { | |
5419 | if (sym != NULL) | |
5420 | { | |
5421 | strcpy (sym->binding_label, binding_label); | |
5422 | } | |
5423 | else | |
5424 | strcpy (curr_binding_label, binding_label); | |
5425 | } | |
5426 | else if (allow_binding_name) | |
5427 | { | |
5428 | /* No binding label, but if symbol isn't null, we | |
5429 | can set the label for it here. | |
5430 | If name="" or allow_binding_name is false, no C binding name is | |
5431 | created. */ | |
5432 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) | |
5433 | strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1); | |
5434 | } | |
5435 | ||
5436 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE | |
5437 | && current_interface.type == INTERFACE_ABSTRACT) | |
5438 | { | |
5439 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); | |
5440 | return MATCH_ERROR; | |
5441 | } | |
5442 | ||
5443 | return MATCH_YES; | |
5444 | } | |
5445 | ||
5446 | ||
5447 | /* Return nonzero if we're currently compiling a contained procedure. */ | |
5448 | ||
5449 | static int | |
5450 | contained_procedure (void) | |
5451 | { | |
5452 | gfc_state_data *s = gfc_state_stack; | |
5453 | ||
5454 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) | |
5455 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) | |
5456 | return 1; | |
5457 | ||
5458 | return 0; | |
5459 | } | |
5460 | ||
5461 | /* Set the kind of each enumerator. The kind is selected such that it is | |
5462 | interoperable with the corresponding C enumeration type, making | |
5463 | sure that -fshort-enums is honored. */ | |
5464 | ||
5465 | static void | |
5466 | set_enum_kind(void) | |
5467 | { | |
5468 | enumerator_history *current_history = NULL; | |
5469 | int kind; | |
5470 | int i; | |
5471 | ||
5472 | if (max_enum == NULL || enum_history == NULL) | |
5473 | return; | |
5474 | ||
5475 | if (!flag_short_enums) | |
5476 | return; | |
5477 | ||
5478 | i = 0; | |
5479 | do | |
5480 | { | |
5481 | kind = gfc_integer_kinds[i++].kind; | |
5482 | } | |
5483 | while (kind < gfc_c_int_kind | |
5484 | && gfc_check_integer_range (max_enum->initializer->value.integer, | |
5485 | kind) != ARITH_OK); | |
5486 | ||
5487 | current_history = enum_history; | |
5488 | while (current_history != NULL) | |
5489 | { | |
5490 | current_history->sym->ts.kind = kind; | |
5491 | current_history = current_history->next; | |
5492 | } | |
5493 | } | |
5494 | ||
5495 | ||
5496 | /* Match any of the various end-block statements. Returns the type of | |
5497 | END to the caller. The END INTERFACE, END IF, END DO, END SELECT | |
5498 | and END BLOCK statements cannot be replaced by a single END statement. */ | |
5499 | ||
5500 | match | |
5501 | gfc_match_end (gfc_statement *st) | |
5502 | { | |
5503 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5504 | gfc_compile_state state; | |
5505 | locus old_loc; | |
5506 | const char *block_name; | |
5507 | const char *target; | |
5508 | int eos_ok; | |
5509 | match m; | |
5510 | ||
5511 | old_loc = gfc_current_locus; | |
5512 | if (gfc_match ("end") != MATCH_YES) | |
5513 | return MATCH_NO; | |
5514 | ||
5515 | state = gfc_current_state (); | |
5516 | block_name = gfc_current_block () == NULL | |
5517 | ? NULL : gfc_current_block ()->name; | |
5518 | ||
5519 | switch (state) | |
5520 | { | |
5521 | case COMP_ASSOCIATE: | |
5522 | case COMP_BLOCK: | |
5523 | if (!strcmp (block_name, "block@")) | |
5524 | block_name = NULL; | |
5525 | break; | |
5526 | ||
5527 | case COMP_CONTAINS: | |
5528 | case COMP_DERIVED_CONTAINS: | |
5529 | state = gfc_state_stack->previous->state; | |
5530 | block_name = gfc_state_stack->previous->sym == NULL | |
5531 | ? NULL : gfc_state_stack->previous->sym->name; | |
5532 | break; | |
5533 | ||
5534 | default: | |
5535 | break; | |
5536 | } | |
5537 | ||
5538 | switch (state) | |
5539 | { | |
5540 | case COMP_NONE: | |
5541 | case COMP_PROGRAM: | |
5542 | *st = ST_END_PROGRAM; | |
5543 | target = " program"; | |
5544 | eos_ok = 1; | |
5545 | break; | |
5546 | ||
5547 | case COMP_SUBROUTINE: | |
5548 | *st = ST_END_SUBROUTINE; | |
5549 | target = " subroutine"; | |
5550 | eos_ok = !contained_procedure (); | |
5551 | break; | |
5552 | ||
5553 | case COMP_FUNCTION: | |
5554 | *st = ST_END_FUNCTION; | |
5555 | target = " function"; | |
5556 | eos_ok = !contained_procedure (); | |
5557 | break; | |
5558 | ||
5559 | case COMP_BLOCK_DATA: | |
5560 | *st = ST_END_BLOCK_DATA; | |
5561 | target = " block data"; | |
5562 | eos_ok = 1; | |
5563 | break; | |
5564 | ||
5565 | case COMP_MODULE: | |
5566 | *st = ST_END_MODULE; | |
5567 | target = " module"; | |
5568 | eos_ok = 1; | |
5569 | break; | |
5570 | ||
5571 | case COMP_INTERFACE: | |
5572 | *st = ST_END_INTERFACE; | |
5573 | target = " interface"; | |
5574 | eos_ok = 0; | |
5575 | break; | |
5576 | ||
5577 | case COMP_DERIVED: | |
5578 | case COMP_DERIVED_CONTAINS: | |
5579 | *st = ST_END_TYPE; | |
5580 | target = " type"; | |
5581 | eos_ok = 0; | |
5582 | break; | |
5583 | ||
5584 | case COMP_ASSOCIATE: | |
5585 | *st = ST_END_ASSOCIATE; | |
5586 | target = " associate"; | |
5587 | eos_ok = 0; | |
5588 | break; | |
5589 | ||
5590 | case COMP_BLOCK: | |
5591 | *st = ST_END_BLOCK; | |
5592 | target = " block"; | |
5593 | eos_ok = 0; | |
5594 | break; | |
5595 | ||
5596 | case COMP_IF: | |
5597 | *st = ST_ENDIF; | |
5598 | target = " if"; | |
5599 | eos_ok = 0; | |
5600 | break; | |
5601 | ||
5602 | case COMP_DO: | |
5603 | *st = ST_ENDDO; | |
5604 | target = " do"; | |
5605 | eos_ok = 0; | |
5606 | break; | |
5607 | ||
5608 | case COMP_CRITICAL: | |
5609 | *st = ST_END_CRITICAL; | |
5610 | target = " critical"; | |
5611 | eos_ok = 0; | |
5612 | break; | |
5613 | ||
5614 | case COMP_SELECT: | |
5615 | case COMP_SELECT_TYPE: | |
5616 | *st = ST_END_SELECT; | |
5617 | target = " select"; | |
5618 | eos_ok = 0; | |
5619 | break; | |
5620 | ||
5621 | case COMP_FORALL: | |
5622 | *st = ST_END_FORALL; | |
5623 | target = " forall"; | |
5624 | eos_ok = 0; | |
5625 | break; | |
5626 | ||
5627 | case COMP_WHERE: | |
5628 | *st = ST_END_WHERE; | |
5629 | target = " where"; | |
5630 | eos_ok = 0; | |
5631 | break; | |
5632 | ||
5633 | case COMP_ENUM: | |
5634 | *st = ST_END_ENUM; | |
5635 | target = " enum"; | |
5636 | eos_ok = 0; | |
5637 | last_initializer = NULL; | |
5638 | set_enum_kind (); | |
5639 | gfc_free_enum_history (); | |
5640 | break; | |
5641 | ||
5642 | default: | |
5643 | gfc_error ("Unexpected END statement at %C"); | |
5644 | goto cleanup; | |
5645 | } | |
5646 | ||
5647 | if (gfc_match_eos () == MATCH_YES) | |
5648 | { | |
5649 | if (!eos_ok && (*st == ST_END_SUBROUTINE || *st == ST_END_FUNCTION)) | |
5650 | { | |
5651 | if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: END statement " | |
5652 | "instead of %s statement at %L", | |
5653 | gfc_ascii_statement (*st), &old_loc) == FAILURE) | |
5654 | goto cleanup; | |
5655 | } | |
5656 | else if (!eos_ok) | |
5657 | { | |
5658 | /* We would have required END [something]. */ | |
5659 | gfc_error ("%s statement expected at %L", | |
5660 | gfc_ascii_statement (*st), &old_loc); | |
5661 | goto cleanup; | |
5662 | } | |
5663 | ||
5664 | return MATCH_YES; | |
5665 | } | |
5666 | ||
5667 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
5668 | if (gfc_match (target) != MATCH_YES) | |
5669 | { | |
5670 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
5671 | goto cleanup; | |
5672 | } | |
5673 | ||
5674 | /* If we're at the end, make sure a block name wasn't required. */ | |
5675 | if (gfc_match_eos () == MATCH_YES) | |
5676 | { | |
5677 | ||
5678 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT | |
5679 | && *st != ST_END_FORALL && *st != ST_END_WHERE && *st != ST_END_BLOCK | |
5680 | && *st != ST_END_ASSOCIATE && *st != ST_END_CRITICAL) | |
5681 | return MATCH_YES; | |
5682 | ||
5683 | if (!block_name) | |
5684 | return MATCH_YES; | |
5685 | ||
5686 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
5687 | block_name, gfc_ascii_statement (*st)); | |
5688 | ||
5689 | return MATCH_ERROR; | |
5690 | } | |
5691 | ||
5692 | /* END INTERFACE has a special handler for its several possible endings. */ | |
5693 | if (*st == ST_END_INTERFACE) | |
5694 | return gfc_match_end_interface (); | |
5695 | ||
5696 | /* We haven't hit the end of statement, so what is left must be an | |
5697 | end-name. */ | |
5698 | m = gfc_match_space (); | |
5699 | if (m == MATCH_YES) | |
5700 | m = gfc_match_name (name); | |
5701 | ||
5702 | if (m == MATCH_NO) | |
5703 | gfc_error ("Expected terminating name at %C"); | |
5704 | if (m != MATCH_YES) | |
5705 | goto cleanup; | |
5706 | ||
5707 | if (block_name == NULL) | |
5708 | goto syntax; | |
5709 | ||
5710 | if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0) | |
5711 | { | |
5712 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
5713 | gfc_ascii_statement (*st)); | |
5714 | goto cleanup; | |
5715 | } | |
5716 | /* Procedure pointer as function result. */ | |
5717 | else if (strcmp (block_name, "ppr@") == 0 | |
5718 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0) | |
5719 | { | |
5720 | gfc_error ("Expected label '%s' for %s statement at %C", | |
5721 | gfc_current_block ()->ns->proc_name->name, | |
5722 | gfc_ascii_statement (*st)); | |
5723 | goto cleanup; | |
5724 | } | |
5725 | ||
5726 | if (gfc_match_eos () == MATCH_YES) | |
5727 | return MATCH_YES; | |
5728 | ||
5729 | syntax: | |
5730 | gfc_syntax_error (*st); | |
5731 | ||
5732 | cleanup: | |
5733 | gfc_current_locus = old_loc; | |
5734 | return MATCH_ERROR; | |
5735 | } | |
5736 | ||
5737 | ||
5738 | ||
5739 | /***************** Attribute declaration statements ****************/ | |
5740 | ||
5741 | /* Set the attribute of a single variable. */ | |
5742 | ||
5743 | static match | |
5744 | attr_decl1 (void) | |
5745 | { | |
5746 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5747 | gfc_array_spec *as; | |
5748 | gfc_symbol *sym; | |
5749 | locus var_locus; | |
5750 | match m; | |
5751 | ||
5752 | as = NULL; | |
5753 | ||
5754 | m = gfc_match_name (name); | |
5755 | if (m != MATCH_YES) | |
5756 | goto cleanup; | |
5757 | ||
5758 | if (find_special (name, &sym, false)) | |
5759 | return MATCH_ERROR; | |
5760 | ||
5761 | var_locus = gfc_current_locus; | |
5762 | ||
5763 | /* Deal with possible array specification for certain attributes. */ | |
5764 | if (current_attr.dimension | |
5765 | || current_attr.codimension | |
5766 | || current_attr.allocatable | |
5767 | || current_attr.pointer | |
5768 | || current_attr.target) | |
5769 | { | |
5770 | m = gfc_match_array_spec (&as, !current_attr.codimension, | |
5771 | !current_attr.dimension | |
5772 | && !current_attr.pointer | |
5773 | && !current_attr.target); | |
5774 | if (m == MATCH_ERROR) | |
5775 | goto cleanup; | |
5776 | ||
5777 | if (current_attr.dimension && m == MATCH_NO) | |
5778 | { | |
5779 | gfc_error ("Missing array specification at %L in DIMENSION " | |
5780 | "statement", &var_locus); | |
5781 | m = MATCH_ERROR; | |
5782 | goto cleanup; | |
5783 | } | |
5784 | ||
5785 | if (current_attr.dimension && sym->value) | |
5786 | { | |
5787 | gfc_error ("Dimensions specified for %s at %L after its " | |
5788 | "initialisation", sym->name, &var_locus); | |
5789 | m = MATCH_ERROR; | |
5790 | goto cleanup; | |
5791 | } | |
5792 | ||
5793 | if (current_attr.codimension && m == MATCH_NO) | |
5794 | { | |
5795 | gfc_error ("Missing array specification at %L in CODIMENSION " | |
5796 | "statement", &var_locus); | |
5797 | m = MATCH_ERROR; | |
5798 | goto cleanup; | |
5799 | } | |
5800 | ||
5801 | if ((current_attr.allocatable || current_attr.pointer) | |
5802 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
5803 | { | |
5804 | gfc_error ("Array specification must be deferred at %L", &var_locus); | |
5805 | m = MATCH_ERROR; | |
5806 | goto cleanup; | |
5807 | } | |
5808 | } | |
5809 | ||
5810 | /* Update symbol table. DIMENSION attribute is set in | |
5811 | gfc_set_array_spec(). For CLASS variables, this must be applied | |
5812 | to the first component, or '$data' field. */ | |
5813 | if (sym->ts.type == BT_CLASS) | |
5814 | { | |
5815 | if (gfc_copy_attr (&CLASS_DATA (sym)->attr, ¤t_attr,&var_locus) | |
5816 | == FAILURE) | |
5817 | { | |
5818 | m = MATCH_ERROR; | |
5819 | goto cleanup; | |
5820 | } | |
5821 | sym->attr.class_ok = (sym->attr.class_ok || current_attr.allocatable | |
5822 | || current_attr.pointer); | |
5823 | } | |
5824 | else | |
5825 | { | |
5826 | if (current_attr.dimension == 0 && current_attr.codimension == 0 | |
5827 | && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE) | |
5828 | { | |
5829 | m = MATCH_ERROR; | |
5830 | goto cleanup; | |
5831 | } | |
5832 | } | |
5833 | ||
5834 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
5835 | { | |
5836 | m = MATCH_ERROR; | |
5837 | goto cleanup; | |
5838 | } | |
5839 | ||
5840 | if (sym->attr.cray_pointee && sym->as != NULL) | |
5841 | { | |
5842 | /* Fix the array spec. */ | |
5843 | m = gfc_mod_pointee_as (sym->as); | |
5844 | if (m == MATCH_ERROR) | |
5845 | goto cleanup; | |
5846 | } | |
5847 | ||
5848 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) | |
5849 | { | |
5850 | m = MATCH_ERROR; | |
5851 | goto cleanup; | |
5852 | } | |
5853 | ||
5854 | if ((current_attr.external || current_attr.intrinsic) | |
5855 | && sym->attr.flavor != FL_PROCEDURE | |
5856 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) | |
5857 | { | |
5858 | m = MATCH_ERROR; | |
5859 | goto cleanup; | |
5860 | } | |
5861 | ||
5862 | add_hidden_procptr_result (sym); | |
5863 | ||
5864 | return MATCH_YES; | |
5865 | ||
5866 | cleanup: | |
5867 | gfc_free_array_spec (as); | |
5868 | return m; | |
5869 | } | |
5870 | ||
5871 | ||
5872 | /* Generic attribute declaration subroutine. Used for attributes that | |
5873 | just have a list of names. */ | |
5874 | ||
5875 | static match | |
5876 | attr_decl (void) | |
5877 | { | |
5878 | match m; | |
5879 | ||
5880 | /* Gobble the optional double colon, by simply ignoring the result | |
5881 | of gfc_match(). */ | |
5882 | gfc_match (" ::"); | |
5883 | ||
5884 | for (;;) | |
5885 | { | |
5886 | m = attr_decl1 (); | |
5887 | if (m != MATCH_YES) | |
5888 | break; | |
5889 | ||
5890 | if (gfc_match_eos () == MATCH_YES) | |
5891 | { | |
5892 | m = MATCH_YES; | |
5893 | break; | |
5894 | } | |
5895 | ||
5896 | if (gfc_match_char (',') != MATCH_YES) | |
5897 | { | |
5898 | gfc_error ("Unexpected character in variable list at %C"); | |
5899 | m = MATCH_ERROR; | |
5900 | break; | |
5901 | } | |
5902 | } | |
5903 | ||
5904 | return m; | |
5905 | } | |
5906 | ||
5907 | ||
5908 | /* This routine matches Cray Pointer declarations of the form: | |
5909 | pointer ( <pointer>, <pointee> ) | |
5910 | or | |
5911 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... | |
5912 | The pointer, if already declared, should be an integer. Otherwise, we | |
5913 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may | |
5914 | be either a scalar, or an array declaration. No space is allocated for | |
5915 | the pointee. For the statement | |
5916 | pointer (ipt, ar(10)) | |
5917 | any subsequent uses of ar will be translated (in C-notation) as | |
5918 | ar(i) => ((<type> *) ipt)(i) | |
5919 | After gimplification, pointee variable will disappear in the code. */ | |
5920 | ||
5921 | static match | |
5922 | cray_pointer_decl (void) | |
5923 | { | |
5924 | match m; | |
5925 | gfc_array_spec *as = NULL; | |
5926 | gfc_symbol *cptr; /* Pointer symbol. */ | |
5927 | gfc_symbol *cpte; /* Pointee symbol. */ | |
5928 | locus var_locus; | |
5929 | bool done = false; | |
5930 | ||
5931 | while (!done) | |
5932 | { | |
5933 | if (gfc_match_char ('(') != MATCH_YES) | |
5934 | { | |
5935 | gfc_error ("Expected '(' at %C"); | |
5936 | return MATCH_ERROR; | |
5937 | } | |
5938 | ||
5939 | /* Match pointer. */ | |
5940 | var_locus = gfc_current_locus; | |
5941 | gfc_clear_attr (¤t_attr); | |
5942 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
5943 | current_ts.type = BT_INTEGER; | |
5944 | current_ts.kind = gfc_index_integer_kind; | |
5945 | ||
5946 | m = gfc_match_symbol (&cptr, 0); | |
5947 | if (m != MATCH_YES) | |
5948 | { | |
5949 | gfc_error ("Expected variable name at %C"); | |
5950 | return m; | |
5951 | } | |
5952 | ||
5953 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) | |
5954 | return MATCH_ERROR; | |
5955 | ||
5956 | gfc_set_sym_referenced (cptr); | |
5957 | ||
5958 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
5959 | { | |
5960 | cptr->ts.type = BT_INTEGER; | |
5961 | cptr->ts.kind = gfc_index_integer_kind; | |
5962 | } | |
5963 | else if (cptr->ts.type != BT_INTEGER) | |
5964 | { | |
5965 | gfc_error ("Cray pointer at %C must be an integer"); | |
5966 | return MATCH_ERROR; | |
5967 | } | |
5968 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
5969 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
5970 | " memory addresses require %d bytes", | |
5971 | cptr->ts.kind, gfc_index_integer_kind); | |
5972 | ||
5973 | if (gfc_match_char (',') != MATCH_YES) | |
5974 | { | |
5975 | gfc_error ("Expected \",\" at %C"); | |
5976 | return MATCH_ERROR; | |
5977 | } | |
5978 | ||
5979 | /* Match Pointee. */ | |
5980 | var_locus = gfc_current_locus; | |
5981 | gfc_clear_attr (¤t_attr); | |
5982 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
5983 | current_ts.type = BT_UNKNOWN; | |
5984 | current_ts.kind = 0; | |
5985 | ||
5986 | m = gfc_match_symbol (&cpte, 0); | |
5987 | if (m != MATCH_YES) | |
5988 | { | |
5989 | gfc_error ("Expected variable name at %C"); | |
5990 | return m; | |
5991 | } | |
5992 | ||
5993 | /* Check for an optional array spec. */ | |
5994 | m = gfc_match_array_spec (&as, true, false); | |
5995 | if (m == MATCH_ERROR) | |
5996 | { | |
5997 | gfc_free_array_spec (as); | |
5998 | return m; | |
5999 | } | |
6000 | else if (m == MATCH_NO) | |
6001 | { | |
6002 | gfc_free_array_spec (as); | |
6003 | as = NULL; | |
6004 | } | |
6005 | ||
6006 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
6007 | return MATCH_ERROR; | |
6008 | ||
6009 | gfc_set_sym_referenced (cpte); | |
6010 | ||
6011 | if (cpte->as == NULL) | |
6012 | { | |
6013 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
6014 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
6015 | } | |
6016 | else if (as != NULL) | |
6017 | { | |
6018 | gfc_error ("Duplicate array spec for Cray pointee at %C"); | |
6019 | gfc_free_array_spec (as); | |
6020 | return MATCH_ERROR; | |
6021 | } | |
6022 | ||
6023 | as = NULL; | |
6024 | ||
6025 | if (cpte->as != NULL) | |
6026 | { | |
6027 | /* Fix array spec. */ | |
6028 | m = gfc_mod_pointee_as (cpte->as); | |
6029 | if (m == MATCH_ERROR) | |
6030 | return m; | |
6031 | } | |
6032 | ||
6033 | /* Point the Pointee at the Pointer. */ | |
6034 | cpte->cp_pointer = cptr; | |
6035 | ||
6036 | if (gfc_match_char (')') != MATCH_YES) | |
6037 | { | |
6038 | gfc_error ("Expected \")\" at %C"); | |
6039 | return MATCH_ERROR; | |
6040 | } | |
6041 | m = gfc_match_char (','); | |
6042 | if (m != MATCH_YES) | |
6043 | done = true; /* Stop searching for more declarations. */ | |
6044 | ||
6045 | } | |
6046 | ||
6047 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
6048 | || gfc_match_eos () != MATCH_YES) | |
6049 | { | |
6050 | gfc_error ("Expected \",\" or end of statement at %C"); | |
6051 | return MATCH_ERROR; | |
6052 | } | |
6053 | return MATCH_YES; | |
6054 | } | |
6055 | ||
6056 | ||
6057 | match | |
6058 | gfc_match_external (void) | |
6059 | { | |
6060 | ||
6061 | gfc_clear_attr (¤t_attr); | |
6062 | current_attr.external = 1; | |
6063 | ||
6064 | return attr_decl (); | |
6065 | } | |
6066 | ||
6067 | ||
6068 | match | |
6069 | gfc_match_intent (void) | |
6070 | { | |
6071 | sym_intent intent; | |
6072 | ||
6073 | /* This is not allowed within a BLOCK construct! */ | |
6074 | if (gfc_current_state () == COMP_BLOCK) | |
6075 | { | |
6076 | gfc_error ("INTENT is not allowed inside of BLOCK at %C"); | |
6077 | return MATCH_ERROR; | |
6078 | } | |
6079 | ||
6080 | intent = match_intent_spec (); | |
6081 | if (intent == INTENT_UNKNOWN) | |
6082 | return MATCH_ERROR; | |
6083 | ||
6084 | gfc_clear_attr (¤t_attr); | |
6085 | current_attr.intent = intent; | |
6086 | ||
6087 | return attr_decl (); | |
6088 | } | |
6089 | ||
6090 | ||
6091 | match | |
6092 | gfc_match_intrinsic (void) | |
6093 | { | |
6094 | ||
6095 | gfc_clear_attr (¤t_attr); | |
6096 | current_attr.intrinsic = 1; | |
6097 | ||
6098 | return attr_decl (); | |
6099 | } | |
6100 | ||
6101 | ||
6102 | match | |
6103 | gfc_match_optional (void) | |
6104 | { | |
6105 | /* This is not allowed within a BLOCK construct! */ | |
6106 | if (gfc_current_state () == COMP_BLOCK) | |
6107 | { | |
6108 | gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C"); | |
6109 | return MATCH_ERROR; | |
6110 | } | |
6111 | ||
6112 | gfc_clear_attr (¤t_attr); | |
6113 | current_attr.optional = 1; | |
6114 | ||
6115 | return attr_decl (); | |
6116 | } | |
6117 | ||
6118 | ||
6119 | match | |
6120 | gfc_match_pointer (void) | |
6121 | { | |
6122 | gfc_gobble_whitespace (); | |
6123 | if (gfc_peek_ascii_char () == '(') | |
6124 | { | |
6125 | if (!gfc_option.flag_cray_pointer) | |
6126 | { | |
6127 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " | |
6128 | "flag"); | |
6129 | return MATCH_ERROR; | |
6130 | } | |
6131 | return cray_pointer_decl (); | |
6132 | } | |
6133 | else | |
6134 | { | |
6135 | gfc_clear_attr (¤t_attr); | |
6136 | current_attr.pointer = 1; | |
6137 | ||
6138 | return attr_decl (); | |
6139 | } | |
6140 | } | |
6141 | ||
6142 | ||
6143 | match | |
6144 | gfc_match_allocatable (void) | |
6145 | { | |
6146 | gfc_clear_attr (¤t_attr); | |
6147 | current_attr.allocatable = 1; | |
6148 | ||
6149 | return attr_decl (); | |
6150 | } | |
6151 | ||
6152 | ||
6153 | match | |
6154 | gfc_match_codimension (void) | |
6155 | { | |
6156 | gfc_clear_attr (¤t_attr); | |
6157 | current_attr.codimension = 1; | |
6158 | ||
6159 | return attr_decl (); | |
6160 | } | |
6161 | ||
6162 | ||
6163 | match | |
6164 | gfc_match_contiguous (void) | |
6165 | { | |
6166 | if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: CONTIGUOUS statement at %C") | |
6167 | == FAILURE) | |
6168 | return MATCH_ERROR; | |
6169 | ||
6170 | gfc_clear_attr (¤t_attr); | |
6171 | current_attr.contiguous = 1; | |
6172 | ||
6173 | return attr_decl (); | |
6174 | } | |
6175 | ||
6176 | ||
6177 | match | |
6178 | gfc_match_dimension (void) | |
6179 | { | |
6180 | gfc_clear_attr (¤t_attr); | |
6181 | current_attr.dimension = 1; | |
6182 | ||
6183 | return attr_decl (); | |
6184 | } | |
6185 | ||
6186 | ||
6187 | match | |
6188 | gfc_match_target (void) | |
6189 | { | |
6190 | gfc_clear_attr (¤t_attr); | |
6191 | current_attr.target = 1; | |
6192 | ||
6193 | return attr_decl (); | |
6194 | } | |
6195 | ||
6196 | ||
6197 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
6198 | statement. */ | |
6199 | ||
6200 | static match | |
6201 | access_attr_decl (gfc_statement st) | |
6202 | { | |
6203 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6204 | interface_type type; | |
6205 | gfc_user_op *uop; | |
6206 | gfc_symbol *sym; | |
6207 | gfc_intrinsic_op op; | |
6208 | match m; | |
6209 | ||
6210 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6211 | goto done; | |
6212 | ||
6213 | for (;;) | |
6214 | { | |
6215 | m = gfc_match_generic_spec (&type, name, &op); | |
6216 | if (m == MATCH_NO) | |
6217 | goto syntax; | |
6218 | if (m == MATCH_ERROR) | |
6219 | return MATCH_ERROR; | |
6220 | ||
6221 | switch (type) | |
6222 | { | |
6223 | case INTERFACE_NAMELESS: | |
6224 | case INTERFACE_ABSTRACT: | |
6225 | goto syntax; | |
6226 | ||
6227 | case INTERFACE_GENERIC: | |
6228 | if (gfc_get_symbol (name, NULL, &sym)) | |
6229 | goto done; | |
6230 | ||
6231 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) | |
6232 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
6233 | sym->name, NULL) == FAILURE) | |
6234 | return MATCH_ERROR; | |
6235 | ||
6236 | break; | |
6237 | ||
6238 | case INTERFACE_INTRINSIC_OP: | |
6239 | if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN) | |
6240 | { | |
6241 | gfc_current_ns->operator_access[op] = | |
6242 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
6243 | } | |
6244 | else | |
6245 | { | |
6246 | gfc_error ("Access specification of the %s operator at %C has " | |
6247 | "already been specified", gfc_op2string (op)); | |
6248 | goto done; | |
6249 | } | |
6250 | ||
6251 | break; | |
6252 | ||
6253 | case INTERFACE_USER_OP: | |
6254 | uop = gfc_get_uop (name); | |
6255 | ||
6256 | if (uop->access == ACCESS_UNKNOWN) | |
6257 | { | |
6258 | uop->access = (st == ST_PUBLIC) | |
6259 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
6260 | } | |
6261 | else | |
6262 | { | |
6263 | gfc_error ("Access specification of the .%s. operator at %C " | |
6264 | "has already been specified", sym->name); | |
6265 | goto done; | |
6266 | } | |
6267 | ||
6268 | break; | |
6269 | } | |
6270 | ||
6271 | if (gfc_match_char (',') == MATCH_NO) | |
6272 | break; | |
6273 | } | |
6274 | ||
6275 | if (gfc_match_eos () != MATCH_YES) | |
6276 | goto syntax; | |
6277 | return MATCH_YES; | |
6278 | ||
6279 | syntax: | |
6280 | gfc_syntax_error (st); | |
6281 | ||
6282 | done: | |
6283 | return MATCH_ERROR; | |
6284 | } | |
6285 | ||
6286 | ||
6287 | match | |
6288 | gfc_match_protected (void) | |
6289 | { | |
6290 | gfc_symbol *sym; | |
6291 | match m; | |
6292 | ||
6293 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
6294 | { | |
6295 | gfc_error ("PROTECTED at %C only allowed in specification " | |
6296 | "part of a module"); | |
6297 | return MATCH_ERROR; | |
6298 | ||
6299 | } | |
6300 | ||
6301 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") | |
6302 | == FAILURE) | |
6303 | return MATCH_ERROR; | |
6304 | ||
6305 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6306 | { | |
6307 | return MATCH_ERROR; | |
6308 | } | |
6309 | ||
6310 | if (gfc_match_eos () == MATCH_YES) | |
6311 | goto syntax; | |
6312 | ||
6313 | for(;;) | |
6314 | { | |
6315 | m = gfc_match_symbol (&sym, 0); | |
6316 | switch (m) | |
6317 | { | |
6318 | case MATCH_YES: | |
6319 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) | |
6320 | == FAILURE) | |
6321 | return MATCH_ERROR; | |
6322 | goto next_item; | |
6323 | ||
6324 | case MATCH_NO: | |
6325 | break; | |
6326 | ||
6327 | case MATCH_ERROR: | |
6328 | return MATCH_ERROR; | |
6329 | } | |
6330 | ||
6331 | next_item: | |
6332 | if (gfc_match_eos () == MATCH_YES) | |
6333 | break; | |
6334 | if (gfc_match_char (',') != MATCH_YES) | |
6335 | goto syntax; | |
6336 | } | |
6337 | ||
6338 | return MATCH_YES; | |
6339 | ||
6340 | syntax: | |
6341 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
6342 | return MATCH_ERROR; | |
6343 | } | |
6344 | ||
6345 | ||
6346 | /* The PRIVATE statement is a bit weird in that it can be an attribute | |
6347 | declaration, but also works as a standalone statement inside of a | |
6348 | type declaration or a module. */ | |
6349 | ||
6350 | match | |
6351 | gfc_match_private (gfc_statement *st) | |
6352 | { | |
6353 | ||
6354 | if (gfc_match ("private") != MATCH_YES) | |
6355 | return MATCH_NO; | |
6356 | ||
6357 | if (gfc_current_state () != COMP_MODULE | |
6358 | && !(gfc_current_state () == COMP_DERIVED | |
6359 | && gfc_state_stack->previous | |
6360 | && gfc_state_stack->previous->state == COMP_MODULE) | |
6361 | && !(gfc_current_state () == COMP_DERIVED_CONTAINS | |
6362 | && gfc_state_stack->previous && gfc_state_stack->previous->previous | |
6363 | && gfc_state_stack->previous->previous->state == COMP_MODULE)) | |
6364 | { | |
6365 | gfc_error ("PRIVATE statement at %C is only allowed in the " | |
6366 | "specification part of a module"); | |
6367 | return MATCH_ERROR; | |
6368 | } | |
6369 | ||
6370 | if (gfc_current_state () == COMP_DERIVED) | |
6371 | { | |
6372 | if (gfc_match_eos () == MATCH_YES) | |
6373 | { | |
6374 | *st = ST_PRIVATE; | |
6375 | return MATCH_YES; | |
6376 | } | |
6377 | ||
6378 | gfc_syntax_error (ST_PRIVATE); | |
6379 | return MATCH_ERROR; | |
6380 | } | |
6381 | ||
6382 | if (gfc_match_eos () == MATCH_YES) | |
6383 | { | |
6384 | *st = ST_PRIVATE; | |
6385 | return MATCH_YES; | |
6386 | } | |
6387 | ||
6388 | *st = ST_ATTR_DECL; | |
6389 | return access_attr_decl (ST_PRIVATE); | |
6390 | } | |
6391 | ||
6392 | ||
6393 | match | |
6394 | gfc_match_public (gfc_statement *st) | |
6395 | { | |
6396 | ||
6397 | if (gfc_match ("public") != MATCH_YES) | |
6398 | return MATCH_NO; | |
6399 | ||
6400 | if (gfc_current_state () != COMP_MODULE) | |
6401 | { | |
6402 | gfc_error ("PUBLIC statement at %C is only allowed in the " | |
6403 | "specification part of a module"); | |
6404 | return MATCH_ERROR; | |
6405 | } | |
6406 | ||
6407 | if (gfc_match_eos () == MATCH_YES) | |
6408 | { | |
6409 | *st = ST_PUBLIC; | |
6410 | return MATCH_YES; | |
6411 | } | |
6412 | ||
6413 | *st = ST_ATTR_DECL; | |
6414 | return access_attr_decl (ST_PUBLIC); | |
6415 | } | |
6416 | ||
6417 | ||
6418 | /* Workhorse for gfc_match_parameter. */ | |
6419 | ||
6420 | static match | |
6421 | do_parm (void) | |
6422 | { | |
6423 | gfc_symbol *sym; | |
6424 | gfc_expr *init; | |
6425 | match m; | |
6426 | gfc_try t; | |
6427 | ||
6428 | m = gfc_match_symbol (&sym, 0); | |
6429 | if (m == MATCH_NO) | |
6430 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
6431 | ||
6432 | if (m != MATCH_YES) | |
6433 | return m; | |
6434 | ||
6435 | if (gfc_match_char ('=') == MATCH_NO) | |
6436 | { | |
6437 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
6438 | return MATCH_ERROR; | |
6439 | } | |
6440 | ||
6441 | m = gfc_match_init_expr (&init); | |
6442 | if (m == MATCH_NO) | |
6443 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
6444 | if (m != MATCH_YES) | |
6445 | return m; | |
6446 | ||
6447 | if (sym->ts.type == BT_UNKNOWN | |
6448 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
6449 | { | |
6450 | m = MATCH_ERROR; | |
6451 | goto cleanup; | |
6452 | } | |
6453 | ||
6454 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
6455 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) | |
6456 | { | |
6457 | m = MATCH_ERROR; | |
6458 | goto cleanup; | |
6459 | } | |
6460 | ||
6461 | if (sym->value) | |
6462 | { | |
6463 | gfc_error ("Initializing already initialized variable at %C"); | |
6464 | m = MATCH_ERROR; | |
6465 | goto cleanup; | |
6466 | } | |
6467 | ||
6468 | t = add_init_expr_to_sym (sym->name, &init, &gfc_current_locus); | |
6469 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
6470 | ||
6471 | cleanup: | |
6472 | gfc_free_expr (init); | |
6473 | return m; | |
6474 | } | |
6475 | ||
6476 | ||
6477 | /* Match a parameter statement, with the weird syntax that these have. */ | |
6478 | ||
6479 | match | |
6480 | gfc_match_parameter (void) | |
6481 | { | |
6482 | match m; | |
6483 | ||
6484 | if (gfc_match_char ('(') == MATCH_NO) | |
6485 | return MATCH_NO; | |
6486 | ||
6487 | for (;;) | |
6488 | { | |
6489 | m = do_parm (); | |
6490 | if (m != MATCH_YES) | |
6491 | break; | |
6492 | ||
6493 | if (gfc_match (" )%t") == MATCH_YES) | |
6494 | break; | |
6495 | ||
6496 | if (gfc_match_char (',') != MATCH_YES) | |
6497 | { | |
6498 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
6499 | m = MATCH_ERROR; | |
6500 | break; | |
6501 | } | |
6502 | } | |
6503 | ||
6504 | return m; | |
6505 | } | |
6506 | ||
6507 | ||
6508 | /* Save statements have a special syntax. */ | |
6509 | ||
6510 | match | |
6511 | gfc_match_save (void) | |
6512 | { | |
6513 | char n[GFC_MAX_SYMBOL_LEN+1]; | |
6514 | gfc_common_head *c; | |
6515 | gfc_symbol *sym; | |
6516 | match m; | |
6517 | ||
6518 | if (gfc_match_eos () == MATCH_YES) | |
6519 | { | |
6520 | if (gfc_current_ns->seen_save) | |
6521 | { | |
6522 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " | |
6523 | "follows previous SAVE statement") | |
6524 | == FAILURE) | |
6525 | return MATCH_ERROR; | |
6526 | } | |
6527 | ||
6528 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
6529 | return MATCH_YES; | |
6530 | } | |
6531 | ||
6532 | if (gfc_current_ns->save_all) | |
6533 | { | |
6534 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " | |
6535 | "blanket SAVE statement") | |
6536 | == FAILURE) | |
6537 | return MATCH_ERROR; | |
6538 | } | |
6539 | ||
6540 | gfc_match (" ::"); | |
6541 | ||
6542 | for (;;) | |
6543 | { | |
6544 | m = gfc_match_symbol (&sym, 0); | |
6545 | switch (m) | |
6546 | { | |
6547 | case MATCH_YES: | |
6548 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) | |
6549 | == FAILURE) | |
6550 | return MATCH_ERROR; | |
6551 | goto next_item; | |
6552 | ||
6553 | case MATCH_NO: | |
6554 | break; | |
6555 | ||
6556 | case MATCH_ERROR: | |
6557 | return MATCH_ERROR; | |
6558 | } | |
6559 | ||
6560 | m = gfc_match (" / %n /", &n); | |
6561 | if (m == MATCH_ERROR) | |
6562 | return MATCH_ERROR; | |
6563 | if (m == MATCH_NO) | |
6564 | goto syntax; | |
6565 | ||
6566 | c = gfc_get_common (n, 0); | |
6567 | c->saved = 1; | |
6568 | ||
6569 | gfc_current_ns->seen_save = 1; | |
6570 | ||
6571 | next_item: | |
6572 | if (gfc_match_eos () == MATCH_YES) | |
6573 | break; | |
6574 | if (gfc_match_char (',') != MATCH_YES) | |
6575 | goto syntax; | |
6576 | } | |
6577 | ||
6578 | return MATCH_YES; | |
6579 | ||
6580 | syntax: | |
6581 | gfc_error ("Syntax error in SAVE statement at %C"); | |
6582 | return MATCH_ERROR; | |
6583 | } | |
6584 | ||
6585 | ||
6586 | match | |
6587 | gfc_match_value (void) | |
6588 | { | |
6589 | gfc_symbol *sym; | |
6590 | match m; | |
6591 | ||
6592 | /* This is not allowed within a BLOCK construct! */ | |
6593 | if (gfc_current_state () == COMP_BLOCK) | |
6594 | { | |
6595 | gfc_error ("VALUE is not allowed inside of BLOCK at %C"); | |
6596 | return MATCH_ERROR; | |
6597 | } | |
6598 | ||
6599 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") | |
6600 | == FAILURE) | |
6601 | return MATCH_ERROR; | |
6602 | ||
6603 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6604 | { | |
6605 | return MATCH_ERROR; | |
6606 | } | |
6607 | ||
6608 | if (gfc_match_eos () == MATCH_YES) | |
6609 | goto syntax; | |
6610 | ||
6611 | for(;;) | |
6612 | { | |
6613 | m = gfc_match_symbol (&sym, 0); | |
6614 | switch (m) | |
6615 | { | |
6616 | case MATCH_YES: | |
6617 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) | |
6618 | == FAILURE) | |
6619 | return MATCH_ERROR; | |
6620 | goto next_item; | |
6621 | ||
6622 | case MATCH_NO: | |
6623 | break; | |
6624 | ||
6625 | case MATCH_ERROR: | |
6626 | return MATCH_ERROR; | |
6627 | } | |
6628 | ||
6629 | next_item: | |
6630 | if (gfc_match_eos () == MATCH_YES) | |
6631 | break; | |
6632 | if (gfc_match_char (',') != MATCH_YES) | |
6633 | goto syntax; | |
6634 | } | |
6635 | ||
6636 | return MATCH_YES; | |
6637 | ||
6638 | syntax: | |
6639 | gfc_error ("Syntax error in VALUE statement at %C"); | |
6640 | return MATCH_ERROR; | |
6641 | } | |
6642 | ||
6643 | ||
6644 | match | |
6645 | gfc_match_volatile (void) | |
6646 | { | |
6647 | gfc_symbol *sym; | |
6648 | match m; | |
6649 | ||
6650 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") | |
6651 | == FAILURE) | |
6652 | return MATCH_ERROR; | |
6653 | ||
6654 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6655 | { | |
6656 | return MATCH_ERROR; | |
6657 | } | |
6658 | ||
6659 | if (gfc_match_eos () == MATCH_YES) | |
6660 | goto syntax; | |
6661 | ||
6662 | for(;;) | |
6663 | { | |
6664 | /* VOLATILE is special because it can be added to host-associated | |
6665 | symbols locally. Except for coarrays. */ | |
6666 | m = gfc_match_symbol (&sym, 1); | |
6667 | switch (m) | |
6668 | { | |
6669 | case MATCH_YES: | |
6670 | /* F2008, C560+C561. VOLATILE for host-/use-associated variable or | |
6671 | for variable in a BLOCK which is defined outside of the BLOCK. */ | |
6672 | if (sym->ns != gfc_current_ns && sym->attr.codimension) | |
6673 | { | |
6674 | gfc_error ("Specifying VOLATILE for coarray variable '%s' at " | |
6675 | "%C, which is use-/host-associated", sym->name); | |
6676 | return MATCH_ERROR; | |
6677 | } | |
6678 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) | |
6679 | == FAILURE) | |
6680 | return MATCH_ERROR; | |
6681 | goto next_item; | |
6682 | ||
6683 | case MATCH_NO: | |
6684 | break; | |
6685 | ||
6686 | case MATCH_ERROR: | |
6687 | return MATCH_ERROR; | |
6688 | } | |
6689 | ||
6690 | next_item: | |
6691 | if (gfc_match_eos () == MATCH_YES) | |
6692 | break; | |
6693 | if (gfc_match_char (',') != MATCH_YES) | |
6694 | goto syntax; | |
6695 | } | |
6696 | ||
6697 | return MATCH_YES; | |
6698 | ||
6699 | syntax: | |
6700 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
6701 | return MATCH_ERROR; | |
6702 | } | |
6703 | ||
6704 | ||
6705 | match | |
6706 | gfc_match_asynchronous (void) | |
6707 | { | |
6708 | gfc_symbol *sym; | |
6709 | match m; | |
6710 | ||
6711 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS statement at %C") | |
6712 | == FAILURE) | |
6713 | return MATCH_ERROR; | |
6714 | ||
6715 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6716 | { | |
6717 | return MATCH_ERROR; | |
6718 | } | |
6719 | ||
6720 | if (gfc_match_eos () == MATCH_YES) | |
6721 | goto syntax; | |
6722 | ||
6723 | for(;;) | |
6724 | { | |
6725 | /* ASYNCHRONOUS is special because it can be added to host-associated | |
6726 | symbols locally. */ | |
6727 | m = gfc_match_symbol (&sym, 1); | |
6728 | switch (m) | |
6729 | { | |
6730 | case MATCH_YES: | |
6731 | if (gfc_add_asynchronous (&sym->attr, sym->name, &gfc_current_locus) | |
6732 | == FAILURE) | |
6733 | return MATCH_ERROR; | |
6734 | goto next_item; | |
6735 | ||
6736 | case MATCH_NO: | |
6737 | break; | |
6738 | ||
6739 | case MATCH_ERROR: | |
6740 | return MATCH_ERROR; | |
6741 | } | |
6742 | ||
6743 | next_item: | |
6744 | if (gfc_match_eos () == MATCH_YES) | |
6745 | break; | |
6746 | if (gfc_match_char (',') != MATCH_YES) | |
6747 | goto syntax; | |
6748 | } | |
6749 | ||
6750 | return MATCH_YES; | |
6751 | ||
6752 | syntax: | |
6753 | gfc_error ("Syntax error in ASYNCHRONOUS statement at %C"); | |
6754 | return MATCH_ERROR; | |
6755 | } | |
6756 | ||
6757 | ||
6758 | /* Match a module procedure statement. Note that we have to modify | |
6759 | symbols in the parent's namespace because the current one was there | |
6760 | to receive symbols that are in an interface's formal argument list. */ | |
6761 | ||
6762 | match | |
6763 | gfc_match_modproc (void) | |
6764 | { | |
6765 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6766 | gfc_symbol *sym; | |
6767 | match m; | |
6768 | gfc_namespace *module_ns; | |
6769 | gfc_interface *old_interface_head, *interface; | |
6770 | ||
6771 | if (gfc_state_stack->state != COMP_INTERFACE | |
6772 | || gfc_state_stack->previous == NULL | |
6773 | || current_interface.type == INTERFACE_NAMELESS | |
6774 | || current_interface.type == INTERFACE_ABSTRACT) | |
6775 | { | |
6776 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " | |
6777 | "interface"); | |
6778 | return MATCH_ERROR; | |
6779 | } | |
6780 | ||
6781 | module_ns = gfc_current_ns->parent; | |
6782 | for (; module_ns; module_ns = module_ns->parent) | |
6783 | if (module_ns->proc_name->attr.flavor == FL_MODULE | |
6784 | || module_ns->proc_name->attr.flavor == FL_PROGRAM | |
6785 | || (module_ns->proc_name->attr.flavor == FL_PROCEDURE | |
6786 | && !module_ns->proc_name->attr.contained)) | |
6787 | break; | |
6788 | ||
6789 | if (module_ns == NULL) | |
6790 | return MATCH_ERROR; | |
6791 | ||
6792 | /* Store the current state of the interface. We will need it if we | |
6793 | end up with a syntax error and need to recover. */ | |
6794 | old_interface_head = gfc_current_interface_head (); | |
6795 | ||
6796 | for (;;) | |
6797 | { | |
6798 | locus old_locus = gfc_current_locus; | |
6799 | bool last = false; | |
6800 | ||
6801 | m = gfc_match_name (name); | |
6802 | if (m == MATCH_NO) | |
6803 | goto syntax; | |
6804 | if (m != MATCH_YES) | |
6805 | return MATCH_ERROR; | |
6806 | ||
6807 | /* Check for syntax error before starting to add symbols to the | |
6808 | current namespace. */ | |
6809 | if (gfc_match_eos () == MATCH_YES) | |
6810 | last = true; | |
6811 | if (!last && gfc_match_char (',') != MATCH_YES) | |
6812 | goto syntax; | |
6813 | ||
6814 | /* Now we're sure the syntax is valid, we process this item | |
6815 | further. */ | |
6816 | if (gfc_get_symbol (name, module_ns, &sym)) | |
6817 | return MATCH_ERROR; | |
6818 | ||
6819 | if (sym->attr.intrinsic) | |
6820 | { | |
6821 | gfc_error ("Intrinsic procedure at %L cannot be a MODULE " | |
6822 | "PROCEDURE", &old_locus); | |
6823 | return MATCH_ERROR; | |
6824 | } | |
6825 | ||
6826 | if (sym->attr.proc != PROC_MODULE | |
6827 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
6828 | sym->name, NULL) == FAILURE) | |
6829 | return MATCH_ERROR; | |
6830 | ||
6831 | if (gfc_add_interface (sym) == FAILURE) | |
6832 | return MATCH_ERROR; | |
6833 | ||
6834 | sym->attr.mod_proc = 1; | |
6835 | sym->declared_at = old_locus; | |
6836 | ||
6837 | if (last) | |
6838 | break; | |
6839 | } | |
6840 | ||
6841 | return MATCH_YES; | |
6842 | ||
6843 | syntax: | |
6844 | /* Restore the previous state of the interface. */ | |
6845 | interface = gfc_current_interface_head (); | |
6846 | gfc_set_current_interface_head (old_interface_head); | |
6847 | ||
6848 | /* Free the new interfaces. */ | |
6849 | while (interface != old_interface_head) | |
6850 | { | |
6851 | gfc_interface *i = interface->next; | |
6852 | gfc_free (interface); | |
6853 | interface = i; | |
6854 | } | |
6855 | ||
6856 | /* And issue a syntax error. */ | |
6857 | gfc_syntax_error (ST_MODULE_PROC); | |
6858 | return MATCH_ERROR; | |
6859 | } | |
6860 | ||
6861 | ||
6862 | /* Check a derived type that is being extended. */ | |
6863 | static gfc_symbol* | |
6864 | check_extended_derived_type (char *name) | |
6865 | { | |
6866 | gfc_symbol *extended; | |
6867 | ||
6868 | if (gfc_find_symbol (name, gfc_current_ns, 1, &extended)) | |
6869 | { | |
6870 | gfc_error ("Ambiguous symbol in TYPE definition at %C"); | |
6871 | return NULL; | |
6872 | } | |
6873 | ||
6874 | if (!extended) | |
6875 | { | |
6876 | gfc_error ("No such symbol in TYPE definition at %C"); | |
6877 | return NULL; | |
6878 | } | |
6879 | ||
6880 | if (extended->attr.flavor != FL_DERIVED) | |
6881 | { | |
6882 | gfc_error ("'%s' in EXTENDS expression at %C is not a " | |
6883 | "derived type", name); | |
6884 | return NULL; | |
6885 | } | |
6886 | ||
6887 | if (extended->attr.is_bind_c) | |
6888 | { | |
6889 | gfc_error ("'%s' cannot be extended at %C because it " | |
6890 | "is BIND(C)", extended->name); | |
6891 | return NULL; | |
6892 | } | |
6893 | ||
6894 | if (extended->attr.sequence) | |
6895 | { | |
6896 | gfc_error ("'%s' cannot be extended at %C because it " | |
6897 | "is a SEQUENCE type", extended->name); | |
6898 | return NULL; | |
6899 | } | |
6900 | ||
6901 | return extended; | |
6902 | } | |
6903 | ||
6904 | ||
6905 | /* Match the optional attribute specifiers for a type declaration. | |
6906 | Return MATCH_ERROR if an error is encountered in one of the handled | |
6907 | attributes (public, private, bind(c)), MATCH_NO if what's found is | |
6908 | not a handled attribute, and MATCH_YES otherwise. TODO: More error | |
6909 | checking on attribute conflicts needs to be done. */ | |
6910 | ||
6911 | match | |
6912 | gfc_get_type_attr_spec (symbol_attribute *attr, char *name) | |
6913 | { | |
6914 | /* See if the derived type is marked as private. */ | |
6915 | if (gfc_match (" , private") == MATCH_YES) | |
6916 | { | |
6917 | if (gfc_current_state () != COMP_MODULE) | |
6918 | { | |
6919 | gfc_error ("Derived type at %C can only be PRIVATE in the " | |
6920 | "specification part of a module"); | |
6921 | return MATCH_ERROR; | |
6922 | } | |
6923 | ||
6924 | if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) | |
6925 | return MATCH_ERROR; | |
6926 | } | |
6927 | else if (gfc_match (" , public") == MATCH_YES) | |
6928 | { | |
6929 | if (gfc_current_state () != COMP_MODULE) | |
6930 | { | |
6931 | gfc_error ("Derived type at %C can only be PUBLIC in the " | |
6932 | "specification part of a module"); | |
6933 | return MATCH_ERROR; | |
6934 | } | |
6935 | ||
6936 | if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) | |
6937 | return MATCH_ERROR; | |
6938 | } | |
6939 | else if (gfc_match (" , bind ( c )") == MATCH_YES) | |
6940 | { | |
6941 | /* If the type is defined to be bind(c) it then needs to make | |
6942 | sure that all fields are interoperable. This will | |
6943 | need to be a semantic check on the finished derived type. | |
6944 | See 15.2.3 (lines 9-12) of F2003 draft. */ | |
6945 | if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) | |
6946 | return MATCH_ERROR; | |
6947 | ||
6948 | /* TODO: attr conflicts need to be checked, probably in symbol.c. */ | |
6949 | } | |
6950 | else if (gfc_match (" , abstract") == MATCH_YES) | |
6951 | { | |
6952 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C") | |
6953 | == FAILURE) | |
6954 | return MATCH_ERROR; | |
6955 | ||
6956 | if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE) | |
6957 | return MATCH_ERROR; | |
6958 | } | |
6959 | else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES) | |
6960 | { | |
6961 | if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE) | |
6962 | return MATCH_ERROR; | |
6963 | } | |
6964 | else | |
6965 | return MATCH_NO; | |
6966 | ||
6967 | /* If we get here, something matched. */ | |
6968 | return MATCH_YES; | |
6969 | } | |
6970 | ||
6971 | ||
6972 | /* Assign a hash value for a derived type. The algorithm is that of | |
6973 | SDBM. The hashed string is '[module_name #] derived_name'. */ | |
6974 | static unsigned int | |
6975 | hash_value (gfc_symbol *sym) | |
6976 | { | |
6977 | unsigned int hash = 0; | |
6978 | const char *c; | |
6979 | int i, len; | |
6980 | ||
6981 | /* Hash of the module or procedure name. */ | |
6982 | if (sym->module != NULL) | |
6983 | c = sym->module; | |
6984 | else if (sym->ns && sym->ns->proc_name | |
6985 | && sym->ns->proc_name->attr.flavor == FL_MODULE) | |
6986 | c = sym->ns->proc_name->name; | |
6987 | else | |
6988 | c = NULL; | |
6989 | ||
6990 | if (c) | |
6991 | { | |
6992 | len = strlen (c); | |
6993 | for (i = 0; i < len; i++, c++) | |
6994 | hash = (hash << 6) + (hash << 16) - hash + (*c); | |
6995 | ||
6996 | /* Disambiguate between 'a' in 'aa' and 'aa' in 'a'. */ | |
6997 | hash = (hash << 6) + (hash << 16) - hash + '#'; | |
6998 | } | |
6999 | ||
7000 | /* Hash of the derived type name. */ | |
7001 | len = strlen (sym->name); | |
7002 | c = sym->name; | |
7003 | for (i = 0; i < len; i++, c++) | |
7004 | hash = (hash << 6) + (hash << 16) - hash + (*c); | |
7005 | ||
7006 | /* Return the hash but take the modulus for the sake of module read, | |
7007 | even though this slightly increases the chance of collision. */ | |
7008 | return (hash % 100000000); | |
7009 | } | |
7010 | ||
7011 | ||
7012 | /* Match the beginning of a derived type declaration. If a type name | |
7013 | was the result of a function, then it is possible to have a symbol | |
7014 | already to be known as a derived type yet have no components. */ | |
7015 | ||
7016 | match | |
7017 | gfc_match_derived_decl (void) | |
7018 | { | |
7019 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7020 | char parent[GFC_MAX_SYMBOL_LEN + 1]; | |
7021 | symbol_attribute attr; | |
7022 | gfc_symbol *sym; | |
7023 | gfc_symbol *extended; | |
7024 | match m; | |
7025 | match is_type_attr_spec = MATCH_NO; | |
7026 | bool seen_attr = false; | |
7027 | ||
7028 | if (gfc_current_state () == COMP_DERIVED) | |
7029 | return MATCH_NO; | |
7030 | ||
7031 | name[0] = '\0'; | |
7032 | parent[0] = '\0'; | |
7033 | gfc_clear_attr (&attr); | |
7034 | extended = NULL; | |
7035 | ||
7036 | do | |
7037 | { | |
7038 | is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent); | |
7039 | if (is_type_attr_spec == MATCH_ERROR) | |
7040 | return MATCH_ERROR; | |
7041 | if (is_type_attr_spec == MATCH_YES) | |
7042 | seen_attr = true; | |
7043 | } while (is_type_attr_spec == MATCH_YES); | |
7044 | ||
7045 | /* Deal with derived type extensions. The extension attribute has | |
7046 | been added to 'attr' but now the parent type must be found and | |
7047 | checked. */ | |
7048 | if (parent[0]) | |
7049 | extended = check_extended_derived_type (parent); | |
7050 | ||
7051 | if (parent[0] && !extended) | |
7052 | return MATCH_ERROR; | |
7053 | ||
7054 | if (gfc_match (" ::") != MATCH_YES && seen_attr) | |
7055 | { | |
7056 | gfc_error ("Expected :: in TYPE definition at %C"); | |
7057 | return MATCH_ERROR; | |
7058 | } | |
7059 | ||
7060 | m = gfc_match (" %n%t", name); | |
7061 | if (m != MATCH_YES) | |
7062 | return m; | |
7063 | ||
7064 | /* Make sure the name is not the name of an intrinsic type. */ | |
7065 | if (gfc_is_intrinsic_typename (name)) | |
7066 | { | |
7067 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " | |
7068 | "type", name); | |
7069 | return MATCH_ERROR; | |
7070 | } | |
7071 | ||
7072 | if (gfc_get_symbol (name, NULL, &sym)) | |
7073 | return MATCH_ERROR; | |
7074 | ||
7075 | if (sym->ts.type != BT_UNKNOWN) | |
7076 | { | |
7077 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
7078 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
7079 | return MATCH_ERROR; | |
7080 | } | |
7081 | ||
7082 | /* The symbol may already have the derived attribute without the | |
7083 | components. The ways this can happen is via a function | |
7084 | definition, an INTRINSIC statement or a subtype in another | |
7085 | derived type that is a pointer. The first part of the AND clause | |
7086 | is true if the symbol is not the return value of a function. */ | |
7087 | if (sym->attr.flavor != FL_DERIVED | |
7088 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) | |
7089 | return MATCH_ERROR; | |
7090 | ||
7091 | if (sym->components != NULL || sym->attr.zero_comp) | |
7092 | { | |
7093 | gfc_error ("Derived type definition of '%s' at %C has already been " | |
7094 | "defined", sym->name); | |
7095 | return MATCH_ERROR; | |
7096 | } | |
7097 | ||
7098 | if (attr.access != ACCESS_UNKNOWN | |
7099 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) | |
7100 | return MATCH_ERROR; | |
7101 | ||
7102 | /* See if the derived type was labeled as bind(c). */ | |
7103 | if (attr.is_bind_c != 0) | |
7104 | sym->attr.is_bind_c = attr.is_bind_c; | |
7105 | ||
7106 | /* Construct the f2k_derived namespace if it is not yet there. */ | |
7107 | if (!sym->f2k_derived) | |
7108 | sym->f2k_derived = gfc_get_namespace (NULL, 0); | |
7109 | ||
7110 | if (extended && !sym->components) | |
7111 | { | |
7112 | gfc_component *p; | |
7113 | gfc_symtree *st; | |
7114 | ||
7115 | /* Add the extended derived type as the first component. */ | |
7116 | gfc_add_component (sym, parent, &p); | |
7117 | extended->refs++; | |
7118 | gfc_set_sym_referenced (extended); | |
7119 | ||
7120 | p->ts.type = BT_DERIVED; | |
7121 | p->ts.u.derived = extended; | |
7122 | p->initializer = gfc_default_initializer (&p->ts); | |
7123 | ||
7124 | /* Set extension level. */ | |
7125 | if (extended->attr.extension == 255) | |
7126 | { | |
7127 | /* Since the extension field is 8 bit wide, we can only have | |
7128 | up to 255 extension levels. */ | |
7129 | gfc_error ("Maximum extension level reached with type '%s' at %L", | |
7130 | extended->name, &extended->declared_at); | |
7131 | return MATCH_ERROR; | |
7132 | } | |
7133 | sym->attr.extension = extended->attr.extension + 1; | |
7134 | ||
7135 | /* Provide the links between the extended type and its extension. */ | |
7136 | if (!extended->f2k_derived) | |
7137 | extended->f2k_derived = gfc_get_namespace (NULL, 0); | |
7138 | st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name); | |
7139 | st->n.sym = sym; | |
7140 | } | |
7141 | ||
7142 | if (!sym->hash_value) | |
7143 | /* Set the hash for the compound name for this type. */ | |
7144 | sym->hash_value = hash_value (sym); | |
7145 | ||
7146 | /* Take over the ABSTRACT attribute. */ | |
7147 | sym->attr.abstract = attr.abstract; | |
7148 | ||
7149 | gfc_new_block = sym; | |
7150 | ||
7151 | return MATCH_YES; | |
7152 | } | |
7153 | ||
7154 | ||
7155 | /* Cray Pointees can be declared as: | |
7156 | pointer (ipt, a (n,m,...,*)) */ | |
7157 | ||
7158 | match | |
7159 | gfc_mod_pointee_as (gfc_array_spec *as) | |
7160 | { | |
7161 | as->cray_pointee = true; /* This will be useful to know later. */ | |
7162 | if (as->type == AS_ASSUMED_SIZE) | |
7163 | as->cp_was_assumed = true; | |
7164 | else if (as->type == AS_ASSUMED_SHAPE) | |
7165 | { | |
7166 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
7167 | return MATCH_ERROR; | |
7168 | } | |
7169 | return MATCH_YES; | |
7170 | } | |
7171 | ||
7172 | ||
7173 | /* Match the enum definition statement, here we are trying to match | |
7174 | the first line of enum definition statement. | |
7175 | Returns MATCH_YES if match is found. */ | |
7176 | ||
7177 | match | |
7178 | gfc_match_enum (void) | |
7179 | { | |
7180 | match m; | |
7181 | ||
7182 | m = gfc_match_eos (); | |
7183 | if (m != MATCH_YES) | |
7184 | return m; | |
7185 | ||
7186 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") | |
7187 | == FAILURE) | |
7188 | return MATCH_ERROR; | |
7189 | ||
7190 | return MATCH_YES; | |
7191 | } | |
7192 | ||
7193 | ||
7194 | /* Returns an initializer whose value is one higher than the value of the | |
7195 | LAST_INITIALIZER argument. If the argument is NULL, the | |
7196 | initializers value will be set to zero. The initializer's kind | |
7197 | will be set to gfc_c_int_kind. | |
7198 | ||
7199 | If -fshort-enums is given, the appropriate kind will be selected | |
7200 | later after all enumerators have been parsed. A warning is issued | |
7201 | here if an initializer exceeds gfc_c_int_kind. */ | |
7202 | ||
7203 | static gfc_expr * | |
7204 | enum_initializer (gfc_expr *last_initializer, locus where) | |
7205 | { | |
7206 | gfc_expr *result; | |
7207 | result = gfc_get_constant_expr (BT_INTEGER, gfc_c_int_kind, &where); | |
7208 | ||
7209 | mpz_init (result->value.integer); | |
7210 | ||
7211 | if (last_initializer != NULL) | |
7212 | { | |
7213 | mpz_add_ui (result->value.integer, last_initializer->value.integer, 1); | |
7214 | result->where = last_initializer->where; | |
7215 | ||
7216 | if (gfc_check_integer_range (result->value.integer, | |
7217 | gfc_c_int_kind) != ARITH_OK) | |
7218 | { | |
7219 | gfc_error ("Enumerator exceeds the C integer type at %C"); | |
7220 | return NULL; | |
7221 | } | |
7222 | } | |
7223 | else | |
7224 | { | |
7225 | /* Control comes here, if it's the very first enumerator and no | |
7226 | initializer has been given. It will be initialized to zero. */ | |
7227 | mpz_set_si (result->value.integer, 0); | |
7228 | } | |
7229 | ||
7230 | return result; | |
7231 | } | |
7232 | ||
7233 | ||
7234 | /* Match a variable name with an optional initializer. When this | |
7235 | subroutine is called, a variable is expected to be parsed next. | |
7236 | Depending on what is happening at the moment, updates either the | |
7237 | symbol table or the current interface. */ | |
7238 | ||
7239 | static match | |
7240 | enumerator_decl (void) | |
7241 | { | |
7242 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7243 | gfc_expr *initializer; | |
7244 | gfc_array_spec *as = NULL; | |
7245 | gfc_symbol *sym; | |
7246 | locus var_locus; | |
7247 | match m; | |
7248 | gfc_try t; | |
7249 | locus old_locus; | |
7250 | ||
7251 | initializer = NULL; | |
7252 | old_locus = gfc_current_locus; | |
7253 | ||
7254 | /* When we get here, we've just matched a list of attributes and | |
7255 | maybe a type and a double colon. The next thing we expect to see | |
7256 | is the name of the symbol. */ | |
7257 | m = gfc_match_name (name); | |
7258 | if (m != MATCH_YES) | |
7259 | goto cleanup; | |
7260 | ||
7261 | var_locus = gfc_current_locus; | |
7262 | ||
7263 | /* OK, we've successfully matched the declaration. Now put the | |
7264 | symbol in the current namespace. If we fail to create the symbol, | |
7265 | bail out. */ | |
7266 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
7267 | { | |
7268 | m = MATCH_ERROR; | |
7269 | goto cleanup; | |
7270 | } | |
7271 | ||
7272 | /* The double colon must be present in order to have initializers. | |
7273 | Otherwise the statement is ambiguous with an assignment statement. */ | |
7274 | if (colon_seen) | |
7275 | { | |
7276 | if (gfc_match_char ('=') == MATCH_YES) | |
7277 | { | |
7278 | m = gfc_match_init_expr (&initializer); | |
7279 | if (m == MATCH_NO) | |
7280 | { | |
7281 | gfc_error ("Expected an initialization expression at %C"); | |
7282 | m = MATCH_ERROR; | |
7283 | } | |
7284 | ||
7285 | if (m != MATCH_YES) | |
7286 | goto cleanup; | |
7287 | } | |
7288 | } | |
7289 | ||
7290 | /* If we do not have an initializer, the initialization value of the | |
7291 | previous enumerator (stored in last_initializer) is incremented | |
7292 | by 1 and is used to initialize the current enumerator. */ | |
7293 | if (initializer == NULL) | |
7294 | initializer = enum_initializer (last_initializer, old_locus); | |
7295 | ||
7296 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) | |
7297 | { | |
7298 | gfc_error ("ENUMERATOR %L not initialized with integer expression", | |
7299 | &var_locus); | |
7300 | m = MATCH_ERROR; | |
7301 | goto cleanup; | |
7302 | } | |
7303 | ||
7304 | /* Store this current initializer, for the next enumerator variable | |
7305 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
7306 | use last_initializer below. */ | |
7307 | last_initializer = initializer; | |
7308 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
7309 | ||
7310 | /* Maintain enumerator history. */ | |
7311 | gfc_find_symbol (name, NULL, 0, &sym); | |
7312 | create_enum_history (sym, last_initializer); | |
7313 | ||
7314 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
7315 | ||
7316 | cleanup: | |
7317 | /* Free stuff up and return. */ | |
7318 | gfc_free_expr (initializer); | |
7319 | ||
7320 | return m; | |
7321 | } | |
7322 | ||
7323 | ||
7324 | /* Match the enumerator definition statement. */ | |
7325 | ||
7326 | match | |
7327 | gfc_match_enumerator_def (void) | |
7328 | { | |
7329 | match m; | |
7330 | gfc_try t; | |
7331 | ||
7332 | gfc_clear_ts (¤t_ts); | |
7333 | ||
7334 | m = gfc_match (" enumerator"); | |
7335 | if (m != MATCH_YES) | |
7336 | return m; | |
7337 | ||
7338 | m = gfc_match (" :: "); | |
7339 | if (m == MATCH_ERROR) | |
7340 | return m; | |
7341 | ||
7342 | colon_seen = (m == MATCH_YES); | |
7343 | ||
7344 | if (gfc_current_state () != COMP_ENUM) | |
7345 | { | |
7346 | gfc_error ("ENUM definition statement expected before %C"); | |
7347 | gfc_free_enum_history (); | |
7348 | return MATCH_ERROR; | |
7349 | } | |
7350 | ||
7351 | (¤t_ts)->type = BT_INTEGER; | |
7352 | (¤t_ts)->kind = gfc_c_int_kind; | |
7353 | ||
7354 | gfc_clear_attr (¤t_attr); | |
7355 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
7356 | if (t == FAILURE) | |
7357 | { | |
7358 | m = MATCH_ERROR; | |
7359 | goto cleanup; | |
7360 | } | |
7361 | ||
7362 | for (;;) | |
7363 | { | |
7364 | m = enumerator_decl (); | |
7365 | if (m == MATCH_ERROR) | |
7366 | { | |
7367 | gfc_free_enum_history (); | |
7368 | goto cleanup; | |
7369 | } | |
7370 | if (m == MATCH_NO) | |
7371 | break; | |
7372 | ||
7373 | if (gfc_match_eos () == MATCH_YES) | |
7374 | goto cleanup; | |
7375 | if (gfc_match_char (',') != MATCH_YES) | |
7376 | break; | |
7377 | } | |
7378 | ||
7379 | if (gfc_current_state () == COMP_ENUM) | |
7380 | { | |
7381 | gfc_free_enum_history (); | |
7382 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
7383 | m = MATCH_ERROR; | |
7384 | } | |
7385 | ||
7386 | cleanup: | |
7387 | gfc_free_array_spec (current_as); | |
7388 | current_as = NULL; | |
7389 | return m; | |
7390 | ||
7391 | } | |
7392 | ||
7393 | ||
7394 | /* Match binding attributes. */ | |
7395 | ||
7396 | static match | |
7397 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc) | |
7398 | { | |
7399 | bool found_passing = false; | |
7400 | bool seen_ptr = false; | |
7401 | match m = MATCH_YES; | |
7402 | ||
7403 | /* Intialize to defaults. Do so even before the MATCH_NO check so that in | |
7404 | this case the defaults are in there. */ | |
7405 | ba->access = ACCESS_UNKNOWN; | |
7406 | ba->pass_arg = NULL; | |
7407 | ba->pass_arg_num = 0; | |
7408 | ba->nopass = 0; | |
7409 | ba->non_overridable = 0; | |
7410 | ba->deferred = 0; | |
7411 | ba->ppc = ppc; | |
7412 | ||
7413 | /* If we find a comma, we believe there are binding attributes. */ | |
7414 | m = gfc_match_char (','); | |
7415 | if (m == MATCH_NO) | |
7416 | goto done; | |
7417 | ||
7418 | do | |
7419 | { | |
7420 | /* Access specifier. */ | |
7421 | ||
7422 | m = gfc_match (" public"); | |
7423 | if (m == MATCH_ERROR) | |
7424 | goto error; | |
7425 | if (m == MATCH_YES) | |
7426 | { | |
7427 | if (ba->access != ACCESS_UNKNOWN) | |
7428 | { | |
7429 | gfc_error ("Duplicate access-specifier at %C"); | |
7430 | goto error; | |
7431 | } | |
7432 | ||
7433 | ba->access = ACCESS_PUBLIC; | |
7434 | continue; | |
7435 | } | |
7436 | ||
7437 | m = gfc_match (" private"); | |
7438 | if (m == MATCH_ERROR) | |
7439 | goto error; | |
7440 | if (m == MATCH_YES) | |
7441 | { | |
7442 | if (ba->access != ACCESS_UNKNOWN) | |
7443 | { | |
7444 | gfc_error ("Duplicate access-specifier at %C"); | |
7445 | goto error; | |
7446 | } | |
7447 | ||
7448 | ba->access = ACCESS_PRIVATE; | |
7449 | continue; | |
7450 | } | |
7451 | ||
7452 | /* If inside GENERIC, the following is not allowed. */ | |
7453 | if (!generic) | |
7454 | { | |
7455 | ||
7456 | /* NOPASS flag. */ | |
7457 | m = gfc_match (" nopass"); | |
7458 | if (m == MATCH_ERROR) | |
7459 | goto error; | |
7460 | if (m == MATCH_YES) | |
7461 | { | |
7462 | if (found_passing) | |
7463 | { | |
7464 | gfc_error ("Binding attributes already specify passing," | |
7465 | " illegal NOPASS at %C"); | |
7466 | goto error; | |
7467 | } | |
7468 | ||
7469 | found_passing = true; | |
7470 | ba->nopass = 1; | |
7471 | continue; | |
7472 | } | |
7473 | ||
7474 | /* PASS possibly including argument. */ | |
7475 | m = gfc_match (" pass"); | |
7476 | if (m == MATCH_ERROR) | |
7477 | goto error; | |
7478 | if (m == MATCH_YES) | |
7479 | { | |
7480 | char arg[GFC_MAX_SYMBOL_LEN + 1]; | |
7481 | ||
7482 | if (found_passing) | |
7483 | { | |
7484 | gfc_error ("Binding attributes already specify passing," | |
7485 | " illegal PASS at %C"); | |
7486 | goto error; | |
7487 | } | |
7488 | ||
7489 | m = gfc_match (" ( %n )", arg); | |
7490 | if (m == MATCH_ERROR) | |
7491 | goto error; | |
7492 | if (m == MATCH_YES) | |
7493 | ba->pass_arg = gfc_get_string (arg); | |
7494 | gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL)); | |
7495 | ||
7496 | found_passing = true; | |
7497 | ba->nopass = 0; | |
7498 | continue; | |
7499 | } | |
7500 | ||
7501 | if (ppc) | |
7502 | { | |
7503 | /* POINTER flag. */ | |
7504 | m = gfc_match (" pointer"); | |
7505 | if (m == MATCH_ERROR) | |
7506 | goto error; | |
7507 | if (m == MATCH_YES) | |
7508 | { | |
7509 | if (seen_ptr) | |
7510 | { | |
7511 | gfc_error ("Duplicate POINTER attribute at %C"); | |
7512 | goto error; | |
7513 | } | |
7514 | ||
7515 | seen_ptr = true; | |
7516 | continue; | |
7517 | } | |
7518 | } | |
7519 | else | |
7520 | { | |
7521 | /* NON_OVERRIDABLE flag. */ | |
7522 | m = gfc_match (" non_overridable"); | |
7523 | if (m == MATCH_ERROR) | |
7524 | goto error; | |
7525 | if (m == MATCH_YES) | |
7526 | { | |
7527 | if (ba->non_overridable) | |
7528 | { | |
7529 | gfc_error ("Duplicate NON_OVERRIDABLE at %C"); | |
7530 | goto error; | |
7531 | } | |
7532 | ||
7533 | ba->non_overridable = 1; | |
7534 | continue; | |
7535 | } | |
7536 | ||
7537 | /* DEFERRED flag. */ | |
7538 | m = gfc_match (" deferred"); | |
7539 | if (m == MATCH_ERROR) | |
7540 | goto error; | |
7541 | if (m == MATCH_YES) | |
7542 | { | |
7543 | if (ba->deferred) | |
7544 | { | |
7545 | gfc_error ("Duplicate DEFERRED at %C"); | |
7546 | goto error; | |
7547 | } | |
7548 | ||
7549 | ba->deferred = 1; | |
7550 | continue; | |
7551 | } | |
7552 | } | |
7553 | ||
7554 | } | |
7555 | ||
7556 | /* Nothing matching found. */ | |
7557 | if (generic) | |
7558 | gfc_error ("Expected access-specifier at %C"); | |
7559 | else | |
7560 | gfc_error ("Expected binding attribute at %C"); | |
7561 | goto error; | |
7562 | } | |
7563 | while (gfc_match_char (',') == MATCH_YES); | |
7564 | ||
7565 | /* NON_OVERRIDABLE and DEFERRED exclude themselves. */ | |
7566 | if (ba->non_overridable && ba->deferred) | |
7567 | { | |
7568 | gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C"); | |
7569 | goto error; | |
7570 | } | |
7571 | ||
7572 | m = MATCH_YES; | |
7573 | ||
7574 | done: | |
7575 | if (ba->access == ACCESS_UNKNOWN) | |
7576 | ba->access = gfc_typebound_default_access; | |
7577 | ||
7578 | if (ppc && !seen_ptr) | |
7579 | { | |
7580 | gfc_error ("POINTER attribute is required for procedure pointer component" | |
7581 | " at %C"); | |
7582 | goto error; | |
7583 | } | |
7584 | ||
7585 | return m; | |
7586 | ||
7587 | error: | |
7588 | return MATCH_ERROR; | |
7589 | } | |
7590 | ||
7591 | ||
7592 | /* Match a PROCEDURE specific binding inside a derived type. */ | |
7593 | ||
7594 | static match | |
7595 | match_procedure_in_type (void) | |
7596 | { | |
7597 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7598 | char target_buf[GFC_MAX_SYMBOL_LEN + 1]; | |
7599 | char* target = NULL, *ifc = NULL; | |
7600 | gfc_typebound_proc tb; | |
7601 | bool seen_colons; | |
7602 | bool seen_attrs; | |
7603 | match m; | |
7604 | gfc_symtree* stree; | |
7605 | gfc_namespace* ns; | |
7606 | gfc_symbol* block; | |
7607 | int num; | |
7608 | ||
7609 | /* Check current state. */ | |
7610 | gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS); | |
7611 | block = gfc_state_stack->previous->sym; | |
7612 | gcc_assert (block); | |
7613 | ||
7614 | /* Try to match PROCEDURE(interface). */ | |
7615 | if (gfc_match (" (") == MATCH_YES) | |
7616 | { | |
7617 | m = gfc_match_name (target_buf); | |
7618 | if (m == MATCH_ERROR) | |
7619 | return m; | |
7620 | if (m != MATCH_YES) | |
7621 | { | |
7622 | gfc_error ("Interface-name expected after '(' at %C"); | |
7623 | return MATCH_ERROR; | |
7624 | } | |
7625 | ||
7626 | if (gfc_match (" )") != MATCH_YES) | |
7627 | { | |
7628 | gfc_error ("')' expected at %C"); | |
7629 | return MATCH_ERROR; | |
7630 | } | |
7631 | ||
7632 | ifc = target_buf; | |
7633 | } | |
7634 | ||
7635 | /* Construct the data structure. */ | |
7636 | tb.where = gfc_current_locus; | |
7637 | tb.is_generic = 0; | |
7638 | ||
7639 | /* Match binding attributes. */ | |
7640 | m = match_binding_attributes (&tb, false, false); | |
7641 | if (m == MATCH_ERROR) | |
7642 | return m; | |
7643 | seen_attrs = (m == MATCH_YES); | |
7644 | ||
7645 | /* Check that attribute DEFERRED is given if an interface is specified. */ | |
7646 | if (tb.deferred && !ifc) | |
7647 | { | |
7648 | gfc_error ("Interface must be specified for DEFERRED binding at %C"); | |
7649 | return MATCH_ERROR; | |
7650 | } | |
7651 | if (ifc && !tb.deferred) | |
7652 | { | |
7653 | gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED"); | |
7654 | return MATCH_ERROR; | |
7655 | } | |
7656 | ||
7657 | /* Match the colons. */ | |
7658 | m = gfc_match (" ::"); | |
7659 | if (m == MATCH_ERROR) | |
7660 | return m; | |
7661 | seen_colons = (m == MATCH_YES); | |
7662 | if (seen_attrs && !seen_colons) | |
7663 | { | |
7664 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
7665 | return MATCH_ERROR; | |
7666 | } | |
7667 | ||
7668 | /* Match the binding names. */ | |
7669 | for(num=1;;num++) | |
7670 | { | |
7671 | m = gfc_match_name (name); | |
7672 | if (m == MATCH_ERROR) | |
7673 | return m; | |
7674 | if (m == MATCH_NO) | |
7675 | { | |
7676 | gfc_error ("Expected binding name at %C"); | |
7677 | return MATCH_ERROR; | |
7678 | } | |
7679 | ||
7680 | if (num>1 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: PROCEDURE list" | |
7681 | " at %C") == FAILURE) | |
7682 | return MATCH_ERROR; | |
7683 | ||
7684 | /* Try to match the '=> target', if it's there. */ | |
7685 | target = ifc; | |
7686 | m = gfc_match (" =>"); | |
7687 | if (m == MATCH_ERROR) | |
7688 | return m; | |
7689 | if (m == MATCH_YES) | |
7690 | { | |
7691 | if (tb.deferred) | |
7692 | { | |
7693 | gfc_error ("'=> target' is invalid for DEFERRED binding at %C"); | |
7694 | return MATCH_ERROR; | |
7695 | } | |
7696 | ||
7697 | if (!seen_colons) | |
7698 | { | |
7699 | gfc_error ("'::' needed in PROCEDURE binding with explicit target" | |
7700 | " at %C"); | |
7701 | return MATCH_ERROR; | |
7702 | } | |
7703 | ||
7704 | m = gfc_match_name (target_buf); | |
7705 | if (m == MATCH_ERROR) | |
7706 | return m; | |
7707 | if (m == MATCH_NO) | |
7708 | { | |
7709 | gfc_error ("Expected binding target after '=>' at %C"); | |
7710 | return MATCH_ERROR; | |
7711 | } | |
7712 | target = target_buf; | |
7713 | } | |
7714 | ||
7715 | /* If no target was found, it has the same name as the binding. */ | |
7716 | if (!target) | |
7717 | target = name; | |
7718 | ||
7719 | /* Get the namespace to insert the symbols into. */ | |
7720 | ns = block->f2k_derived; | |
7721 | gcc_assert (ns); | |
7722 | ||
7723 | /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */ | |
7724 | if (tb.deferred && !block->attr.abstract) | |
7725 | { | |
7726 | gfc_error ("Type '%s' containing DEFERRED binding at %C " | |
7727 | "is not ABSTRACT", block->name); | |
7728 | return MATCH_ERROR; | |
7729 | } | |
7730 | ||
7731 | /* See if we already have a binding with this name in the symtree which | |
7732 | would be an error. If a GENERIC already targetted this binding, it may | |
7733 | be already there but then typebound is still NULL. */ | |
7734 | stree = gfc_find_symtree (ns->tb_sym_root, name); | |
7735 | if (stree && stree->n.tb) | |
7736 | { | |
7737 | gfc_error ("There is already a procedure with binding name '%s' for " | |
7738 | "the derived type '%s' at %C", name, block->name); | |
7739 | return MATCH_ERROR; | |
7740 | } | |
7741 | ||
7742 | /* Insert it and set attributes. */ | |
7743 | ||
7744 | if (!stree) | |
7745 | { | |
7746 | stree = gfc_new_symtree (&ns->tb_sym_root, name); | |
7747 | gcc_assert (stree); | |
7748 | } | |
7749 | stree->n.tb = gfc_get_typebound_proc (&tb); | |
7750 | ||
7751 | if (gfc_get_sym_tree (target, gfc_current_ns, &stree->n.tb->u.specific, | |
7752 | false)) | |
7753 | return MATCH_ERROR; | |
7754 | gfc_set_sym_referenced (stree->n.tb->u.specific->n.sym); | |
7755 | ||
7756 | if (gfc_match_eos () == MATCH_YES) | |
7757 | return MATCH_YES; | |
7758 | if (gfc_match_char (',') != MATCH_YES) | |
7759 | goto syntax; | |
7760 | } | |
7761 | ||
7762 | syntax: | |
7763 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
7764 | return MATCH_ERROR; | |
7765 | } | |
7766 | ||
7767 | ||
7768 | /* Match a GENERIC procedure binding inside a derived type. */ | |
7769 | ||
7770 | match | |
7771 | gfc_match_generic (void) | |
7772 | { | |
7773 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7774 | char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */ | |
7775 | gfc_symbol* block; | |
7776 | gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */ | |
7777 | gfc_typebound_proc* tb; | |
7778 | gfc_namespace* ns; | |
7779 | interface_type op_type; | |
7780 | gfc_intrinsic_op op; | |
7781 | match m; | |
7782 | ||
7783 | /* Check current state. */ | |
7784 | if (gfc_current_state () == COMP_DERIVED) | |
7785 | { | |
7786 | gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS"); | |
7787 | return MATCH_ERROR; | |
7788 | } | |
7789 | if (gfc_current_state () != COMP_DERIVED_CONTAINS) | |
7790 | return MATCH_NO; | |
7791 | block = gfc_state_stack->previous->sym; | |
7792 | ns = block->f2k_derived; | |
7793 | gcc_assert (block && ns); | |
7794 | ||
7795 | /* See if we get an access-specifier. */ | |
7796 | m = match_binding_attributes (&tbattr, true, false); | |
7797 | if (m == MATCH_ERROR) | |
7798 | goto error; | |
7799 | ||
7800 | /* Now the colons, those are required. */ | |
7801 | if (gfc_match (" ::") != MATCH_YES) | |
7802 | { | |
7803 | gfc_error ("Expected '::' at %C"); | |
7804 | goto error; | |
7805 | } | |
7806 | ||
7807 | /* Match the binding name; depending on type (operator / generic) format | |
7808 | it for future error messages into bind_name. */ | |
7809 | ||
7810 | m = gfc_match_generic_spec (&op_type, name, &op); | |
7811 | if (m == MATCH_ERROR) | |
7812 | return MATCH_ERROR; | |
7813 | if (m == MATCH_NO) | |
7814 | { | |
7815 | gfc_error ("Expected generic name or operator descriptor at %C"); | |
7816 | goto error; | |
7817 | } | |
7818 | ||
7819 | switch (op_type) | |
7820 | { | |
7821 | case INTERFACE_GENERIC: | |
7822 | snprintf (bind_name, sizeof (bind_name), "%s", name); | |
7823 | break; | |
7824 | ||
7825 | case INTERFACE_USER_OP: | |
7826 | snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name); | |
7827 | break; | |
7828 | ||
7829 | case INTERFACE_INTRINSIC_OP: | |
7830 | snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)", | |
7831 | gfc_op2string (op)); | |
7832 | break; | |
7833 | ||
7834 | default: | |
7835 | gcc_unreachable (); | |
7836 | } | |
7837 | ||
7838 | /* Match the required =>. */ | |
7839 | if (gfc_match (" =>") != MATCH_YES) | |
7840 | { | |
7841 | gfc_error ("Expected '=>' at %C"); | |
7842 | goto error; | |
7843 | } | |
7844 | ||
7845 | /* Try to find existing GENERIC binding with this name / for this operator; | |
7846 | if there is something, check that it is another GENERIC and then extend | |
7847 | it rather than building a new node. Otherwise, create it and put it | |
7848 | at the right position. */ | |
7849 | ||
7850 | switch (op_type) | |
7851 | { | |
7852 | case INTERFACE_USER_OP: | |
7853 | case INTERFACE_GENERIC: | |
7854 | { | |
7855 | const bool is_op = (op_type == INTERFACE_USER_OP); | |
7856 | gfc_symtree* st; | |
7857 | ||
7858 | st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name); | |
7859 | if (st) | |
7860 | { | |
7861 | tb = st->n.tb; | |
7862 | gcc_assert (tb); | |
7863 | } | |
7864 | else | |
7865 | tb = NULL; | |
7866 | ||
7867 | break; | |
7868 | } | |
7869 | ||
7870 | case INTERFACE_INTRINSIC_OP: | |
7871 | tb = ns->tb_op[op]; | |
7872 | break; | |
7873 | ||
7874 | default: | |
7875 | gcc_unreachable (); | |
7876 | } | |
7877 | ||
7878 | if (tb) | |
7879 | { | |
7880 | if (!tb->is_generic) | |
7881 | { | |
7882 | gcc_assert (op_type == INTERFACE_GENERIC); | |
7883 | gfc_error ("There's already a non-generic procedure with binding name" | |
7884 | " '%s' for the derived type '%s' at %C", | |
7885 | bind_name, block->name); | |
7886 | goto error; | |
7887 | } | |
7888 | ||
7889 | if (tb->access != tbattr.access) | |
7890 | { | |
7891 | gfc_error ("Binding at %C must have the same access as already" | |
7892 | " defined binding '%s'", bind_name); | |
7893 | goto error; | |
7894 | } | |
7895 | } | |
7896 | else | |
7897 | { | |
7898 | tb = gfc_get_typebound_proc (NULL); | |
7899 | tb->where = gfc_current_locus; | |
7900 | tb->access = tbattr.access; | |
7901 | tb->is_generic = 1; | |
7902 | tb->u.generic = NULL; | |
7903 | ||
7904 | switch (op_type) | |
7905 | { | |
7906 | case INTERFACE_GENERIC: | |
7907 | case INTERFACE_USER_OP: | |
7908 | { | |
7909 | const bool is_op = (op_type == INTERFACE_USER_OP); | |
7910 | gfc_symtree* st; | |
7911 | ||
7912 | st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root, | |
7913 | name); | |
7914 | gcc_assert (st); | |
7915 | st->n.tb = tb; | |
7916 | ||
7917 | break; | |
7918 | } | |
7919 | ||
7920 | case INTERFACE_INTRINSIC_OP: | |
7921 | ns->tb_op[op] = tb; | |
7922 | break; | |
7923 | ||
7924 | default: | |
7925 | gcc_unreachable (); | |
7926 | } | |
7927 | } | |
7928 | ||
7929 | /* Now, match all following names as specific targets. */ | |
7930 | do | |
7931 | { | |
7932 | gfc_symtree* target_st; | |
7933 | gfc_tbp_generic* target; | |
7934 | ||
7935 | m = gfc_match_name (name); | |
7936 | if (m == MATCH_ERROR) | |
7937 | goto error; | |
7938 | if (m == MATCH_NO) | |
7939 | { | |
7940 | gfc_error ("Expected specific binding name at %C"); | |
7941 | goto error; | |
7942 | } | |
7943 | ||
7944 | target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name); | |
7945 | ||
7946 | /* See if this is a duplicate specification. */ | |
7947 | for (target = tb->u.generic; target; target = target->next) | |
7948 | if (target_st == target->specific_st) | |
7949 | { | |
7950 | gfc_error ("'%s' already defined as specific binding for the" | |
7951 | " generic '%s' at %C", name, bind_name); | |
7952 | goto error; | |
7953 | } | |
7954 | ||
7955 | target = gfc_get_tbp_generic (); | |
7956 | target->specific_st = target_st; | |
7957 | target->specific = NULL; | |
7958 | target->next = tb->u.generic; | |
7959 | tb->u.generic = target; | |
7960 | } | |
7961 | while (gfc_match (" ,") == MATCH_YES); | |
7962 | ||
7963 | /* Here should be the end. */ | |
7964 | if (gfc_match_eos () != MATCH_YES) | |
7965 | { | |
7966 | gfc_error ("Junk after GENERIC binding at %C"); | |
7967 | goto error; | |
7968 | } | |
7969 | ||
7970 | return MATCH_YES; | |
7971 | ||
7972 | error: | |
7973 | return MATCH_ERROR; | |
7974 | } | |
7975 | ||
7976 | ||
7977 | /* Match a FINAL declaration inside a derived type. */ | |
7978 | ||
7979 | match | |
7980 | gfc_match_final_decl (void) | |
7981 | { | |
7982 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7983 | gfc_symbol* sym; | |
7984 | match m; | |
7985 | gfc_namespace* module_ns; | |
7986 | bool first, last; | |
7987 | gfc_symbol* block; | |
7988 | ||
7989 | if (gfc_current_form == FORM_FREE) | |
7990 | { | |
7991 | char c = gfc_peek_ascii_char (); | |
7992 | if (!gfc_is_whitespace (c) && c != ':') | |
7993 | return MATCH_NO; | |
7994 | } | |
7995 | ||
7996 | if (gfc_state_stack->state != COMP_DERIVED_CONTAINS) | |
7997 | { | |
7998 | if (gfc_current_form == FORM_FIXED) | |
7999 | return MATCH_NO; | |
8000 | ||
8001 | gfc_error ("FINAL declaration at %C must be inside a derived type " | |
8002 | "CONTAINS section"); | |
8003 | return MATCH_ERROR; | |
8004 | } | |
8005 | ||
8006 | block = gfc_state_stack->previous->sym; | |
8007 | gcc_assert (block); | |
8008 | ||
8009 | if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous | |
8010 | || gfc_state_stack->previous->previous->state != COMP_MODULE) | |
8011 | { | |
8012 | gfc_error ("Derived type declaration with FINAL at %C must be in the" | |
8013 | " specification part of a MODULE"); | |
8014 | return MATCH_ERROR; | |
8015 | } | |
8016 | ||
8017 | module_ns = gfc_current_ns; | |
8018 | gcc_assert (module_ns); | |
8019 | gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE); | |
8020 | ||
8021 | /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */ | |
8022 | if (gfc_match (" ::") == MATCH_ERROR) | |
8023 | return MATCH_ERROR; | |
8024 | ||
8025 | /* Match the sequence of procedure names. */ | |
8026 | first = true; | |
8027 | last = false; | |
8028 | do | |
8029 | { | |
8030 | gfc_finalizer* f; | |
8031 | ||
8032 | if (first && gfc_match_eos () == MATCH_YES) | |
8033 | { | |
8034 | gfc_error ("Empty FINAL at %C"); | |
8035 | return MATCH_ERROR; | |
8036 | } | |
8037 | ||
8038 | m = gfc_match_name (name); | |
8039 | if (m == MATCH_NO) | |
8040 | { | |
8041 | gfc_error ("Expected module procedure name at %C"); | |
8042 | return MATCH_ERROR; | |
8043 | } | |
8044 | else if (m != MATCH_YES) | |
8045 | return MATCH_ERROR; | |
8046 | ||
8047 | if (gfc_match_eos () == MATCH_YES) | |
8048 | last = true; | |
8049 | if (!last && gfc_match_char (',') != MATCH_YES) | |
8050 | { | |
8051 | gfc_error ("Expected ',' at %C"); | |
8052 | return MATCH_ERROR; | |
8053 | } | |
8054 | ||
8055 | if (gfc_get_symbol (name, module_ns, &sym)) | |
8056 | { | |
8057 | gfc_error ("Unknown procedure name \"%s\" at %C", name); | |
8058 | return MATCH_ERROR; | |
8059 | } | |
8060 | ||
8061 | /* Mark the symbol as module procedure. */ | |
8062 | if (sym->attr.proc != PROC_MODULE | |
8063 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
8064 | sym->name, NULL) == FAILURE) | |
8065 | return MATCH_ERROR; | |
8066 | ||
8067 | /* Check if we already have this symbol in the list, this is an error. */ | |
8068 | for (f = block->f2k_derived->finalizers; f; f = f->next) | |
8069 | if (f->proc_sym == sym) | |
8070 | { | |
8071 | gfc_error ("'%s' at %C is already defined as FINAL procedure!", | |
8072 | name); | |
8073 | return MATCH_ERROR; | |
8074 | } | |
8075 | ||
8076 | /* Add this symbol to the list of finalizers. */ | |
8077 | gcc_assert (block->f2k_derived); | |
8078 | ++sym->refs; | |
8079 | f = XCNEW (gfc_finalizer); | |
8080 | f->proc_sym = sym; | |
8081 | f->proc_tree = NULL; | |
8082 | f->where = gfc_current_locus; | |
8083 | f->next = block->f2k_derived->finalizers; | |
8084 | block->f2k_derived->finalizers = f; | |
8085 | ||
8086 | first = false; | |
8087 | } | |
8088 | while (!last); | |
8089 | ||
8090 | return MATCH_YES; | |
8091 | } | |
8092 | ||
8093 | ||
8094 | const ext_attr_t ext_attr_list[] = { | |
8095 | { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" }, | |
8096 | { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" }, | |
8097 | { "cdecl", EXT_ATTR_CDECL, "cdecl" }, | |
8098 | { "stdcall", EXT_ATTR_STDCALL, "stdcall" }, | |
8099 | { "fastcall", EXT_ATTR_FASTCALL, "fastcall" }, | |
8100 | { NULL, EXT_ATTR_LAST, NULL } | |
8101 | }; | |
8102 | ||
8103 | /* Match a !GCC$ ATTRIBUTES statement of the form: | |
8104 | !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ... | |
8105 | When we come here, we have already matched the !GCC$ ATTRIBUTES string. | |
8106 | ||
8107 | TODO: We should support all GCC attributes using the same syntax for | |
8108 | the attribute list, i.e. the list in C | |
8109 | __attributes(( attribute-list )) | |
8110 | matches then | |
8111 | !GCC$ ATTRIBUTES attribute-list :: | |
8112 | Cf. c-parser.c's c_parser_attributes; the data can then directly be | |
8113 | saved into a TREE. | |
8114 | ||
8115 | As there is absolutely no risk of confusion, we should never return | |
8116 | MATCH_NO. */ | |
8117 | match | |
8118 | gfc_match_gcc_attributes (void) | |
8119 | { | |
8120 | symbol_attribute attr; | |
8121 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
8122 | unsigned id; | |
8123 | gfc_symbol *sym; | |
8124 | match m; | |
8125 | ||
8126 | gfc_clear_attr (&attr); | |
8127 | for(;;) | |
8128 | { | |
8129 | char ch; | |
8130 | ||
8131 | if (gfc_match_name (name) != MATCH_YES) | |
8132 | return MATCH_ERROR; | |
8133 | ||
8134 | for (id = 0; id < EXT_ATTR_LAST; id++) | |
8135 | if (strcmp (name, ext_attr_list[id].name) == 0) | |
8136 | break; | |
8137 | ||
8138 | if (id == EXT_ATTR_LAST) | |
8139 | { | |
8140 | gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C"); | |
8141 | return MATCH_ERROR; | |
8142 | } | |
8143 | ||
8144 | if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus) | |
8145 | == FAILURE) | |
8146 | return MATCH_ERROR; | |
8147 | ||
8148 | gfc_gobble_whitespace (); | |
8149 | ch = gfc_next_ascii_char (); | |
8150 | if (ch == ':') | |
8151 | { | |
8152 | /* This is the successful exit condition for the loop. */ | |
8153 | if (gfc_next_ascii_char () == ':') | |
8154 | break; | |
8155 | } | |
8156 | ||
8157 | if (ch == ',') | |
8158 | continue; | |
8159 | ||
8160 | goto syntax; | |
8161 | } | |
8162 | ||
8163 | if (gfc_match_eos () == MATCH_YES) | |
8164 | goto syntax; | |
8165 | ||
8166 | for(;;) | |
8167 | { | |
8168 | m = gfc_match_name (name); | |
8169 | if (m != MATCH_YES) | |
8170 | return m; | |
8171 | ||
8172 | if (find_special (name, &sym, true)) | |
8173 | return MATCH_ERROR; | |
8174 | ||
8175 | sym->attr.ext_attr |= attr.ext_attr; | |
8176 | ||
8177 | if (gfc_match_eos () == MATCH_YES) | |
8178 | break; | |
8179 | ||
8180 | if (gfc_match_char (',') != MATCH_YES) | |
8181 | goto syntax; | |
8182 | } | |
8183 | ||
8184 | return MATCH_YES; | |
8185 | ||
8186 | syntax: | |
8187 | gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C"); | |
8188 | return MATCH_ERROR; | |
8189 | } |