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4ee9c684 | 1 | /* Declaration statement matcher |
1a9745d2 | 2 | Copyright (C) 2002, 2004, 2005, 2006, 2007 |
3 | Free Software Foundation, Inc. | |
4ee9c684 | 4 | Contributed by Andy Vaught |
5 | ||
c84b470d | 6 | This file is part of GCC. |
4ee9c684 | 7 | |
c84b470d | 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 | |
bdabe786 | 10 | Software Foundation; either version 3, or (at your option) any later |
c84b470d | 11 | version. |
4ee9c684 | 12 | |
c84b470d | 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. | |
4ee9c684 | 17 | |
18 | You should have received a copy of the GNU General Public License | |
bdabe786 | 19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
4ee9c684 | 21 | |
4ee9c684 | 22 | #include "config.h" |
7436502b | 23 | #include "system.h" |
4ee9c684 | 24 | #include "gfortran.h" |
25 | #include "match.h" | |
26 | #include "parse.h" | |
4ee9c684 | 27 | |
cbbac028 | 28 | |
29 | /* Macros to access allocate memory for gfc_data_variable, | |
30 | gfc_data_value and gfc_data. */ | |
31 | #define gfc_get_data_variable() gfc_getmem (sizeof (gfc_data_variable)) | |
32 | #define gfc_get_data_value() gfc_getmem (sizeof (gfc_data_value)) | |
33 | #define gfc_get_data() gfc_getmem( sizeof (gfc_data)) | |
34 | ||
35 | ||
36ae04f2 | 36 | /* This flag is set if an old-style length selector is matched |
4ee9c684 | 37 | during a type-declaration statement. */ |
38 | ||
39 | static int old_char_selector; | |
40 | ||
5739e54e | 41 | /* When variables acquire types and attributes from a declaration |
4ee9c684 | 42 | statement, they get them from the following static variables. The |
43 | first part of a declaration sets these variables and the second | |
44 | part copies these into symbol structures. */ | |
45 | ||
46 | static gfc_typespec current_ts; | |
47 | ||
48 | static symbol_attribute current_attr; | |
49 | static gfc_array_spec *current_as; | |
50 | static int colon_seen; | |
51 | ||
c5d33754 | 52 | /* The current binding label (if any). */ |
53 | static char curr_binding_label[GFC_MAX_BINDING_LABEL_LEN + 1]; | |
54 | /* Need to know how many identifiers are on the current data declaration | |
55 | line in case we're given the BIND(C) attribute with a NAME= specifier. */ | |
56 | static int num_idents_on_line; | |
57 | /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we | |
58 | can supply a name if the curr_binding_label is nil and NAME= was not. */ | |
59 | static int has_name_equals = 0; | |
60 | ||
3b6a4b41 | 61 | /* Initializer of the previous enumerator. */ |
62 | ||
63 | static gfc_expr *last_initializer; | |
64 | ||
65 | /* History of all the enumerators is maintained, so that | |
66 | kind values of all the enumerators could be updated depending | |
67 | upon the maximum initialized value. */ | |
68 | ||
69 | typedef struct enumerator_history | |
70 | { | |
71 | gfc_symbol *sym; | |
72 | gfc_expr *initializer; | |
73 | struct enumerator_history *next; | |
74 | } | |
75 | enumerator_history; | |
76 | ||
77 | /* Header of enum history chain. */ | |
78 | ||
79 | static enumerator_history *enum_history = NULL; | |
80 | ||
81 | /* Pointer of enum history node containing largest initializer. */ | |
82 | ||
83 | static enumerator_history *max_enum = NULL; | |
84 | ||
4ee9c684 | 85 | /* gfc_new_block points to the symbol of a newly matched block. */ |
86 | ||
87 | gfc_symbol *gfc_new_block; | |
88 | ||
67a51c8e | 89 | locus gfc_function_kind_locus; |
90 | locus gfc_function_type_locus; | |
91 | ||
4ee9c684 | 92 | |
b4f45d02 | 93 | /********************* DATA statement subroutines *********************/ |
94 | ||
1bfea7e8 | 95 | static bool in_match_data = false; |
96 | ||
97 | bool | |
98 | gfc_in_match_data (void) | |
99 | { | |
100 | return in_match_data; | |
101 | } | |
102 | ||
cbbac028 | 103 | static void |
104 | set_in_match_data (bool set_value) | |
1bfea7e8 | 105 | { |
106 | in_match_data = set_value; | |
107 | } | |
108 | ||
b4f45d02 | 109 | /* Free a gfc_data_variable structure and everything beneath it. */ |
110 | ||
111 | static void | |
1a9745d2 | 112 | free_variable (gfc_data_variable *p) |
b4f45d02 | 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); | |
b4f45d02 | 122 | gfc_free (p); |
123 | } | |
124 | } | |
125 | ||
126 | ||
127 | /* Free a gfc_data_value structure and everything beneath it. */ | |
128 | ||
129 | static void | |
1a9745d2 | 130 | free_value (gfc_data_value *p) |
b4f45d02 | 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 | |
1a9745d2 | 146 | gfc_free_data (gfc_data *p) |
b4f45d02 | 147 | { |
148 | gfc_data *q; | |
149 | ||
150 | for (; p; p = q) | |
151 | { | |
152 | q = p->next; | |
b4f45d02 | 153 | free_variable (p->var); |
154 | free_value (p->value); | |
b4f45d02 | 155 | gfc_free (p); |
156 | } | |
157 | } | |
158 | ||
159 | ||
af29c1f0 | 160 | /* Free all data in a namespace. */ |
1a9745d2 | 161 | |
af29c1f0 | 162 | static void |
f6d0e37a | 163 | gfc_free_data_all (gfc_namespace *ns) |
af29c1f0 | 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 | ||
b4f45d02 | 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 | |
1a9745d2 | 182 | var_list (gfc_data_variable *parent) |
b4f45d02 | 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 | |
1a9745d2 | 235 | var_element (gfc_data_variable *new) |
b4f45d02 | 236 | { |
237 | match m; | |
238 | gfc_symbol *sym; | |
239 | ||
240 | memset (new, 0, sizeof (gfc_data_variable)); | |
241 | ||
242 | if (gfc_match_char ('(') == MATCH_YES) | |
243 | return var_list (new); | |
244 | ||
245 | m = gfc_match_variable (&new->expr, 0); | |
246 | if (m != MATCH_YES) | |
247 | return m; | |
248 | ||
249 | sym = new->expr->symtree->n.sym; | |
250 | ||
1a9745d2 | 251 | if (!sym->attr.function && gfc_current_ns->parent |
252 | && gfc_current_ns->parent == sym->ns) | |
b4f45d02 | 253 | { |
c8df3e9c | 254 | gfc_error ("Host associated variable '%s' may not be in the DATA " |
7698a624 | 255 | "statement at %C", sym->name); |
b4f45d02 | 256 | return MATCH_ERROR; |
257 | } | |
258 | ||
c8df3e9c | 259 | if (gfc_current_state () != COMP_BLOCK_DATA |
1a9745d2 | 260 | && sym->attr.in_common |
261 | && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of " | |
262 | "common block variable '%s' in DATA statement at %C", | |
263 | sym->name) == FAILURE) | |
c8df3e9c | 264 | return MATCH_ERROR; |
b4f45d02 | 265 | |
950683ed | 266 | if (gfc_add_data (&sym->attr, sym->name, &new->expr->where) == FAILURE) |
b4f45d02 | 267 | return MATCH_ERROR; |
268 | ||
269 | return MATCH_YES; | |
270 | } | |
271 | ||
272 | ||
273 | /* Match the top-level list of data variables. */ | |
274 | ||
275 | static match | |
1a9745d2 | 276 | top_var_list (gfc_data *d) |
b4f45d02 | 277 | { |
278 | gfc_data_variable var, *tail, *new; | |
279 | match m; | |
280 | ||
281 | tail = NULL; | |
282 | ||
283 | for (;;) | |
284 | { | |
285 | m = var_element (&var); | |
286 | if (m == MATCH_NO) | |
287 | goto syntax; | |
288 | if (m == MATCH_ERROR) | |
289 | return MATCH_ERROR; | |
290 | ||
291 | new = gfc_get_data_variable (); | |
292 | *new = var; | |
293 | ||
294 | if (tail == NULL) | |
295 | d->var = new; | |
296 | else | |
297 | tail->next = new; | |
298 | ||
299 | tail = new; | |
300 | ||
301 | if (gfc_match_char ('/') == MATCH_YES) | |
302 | break; | |
303 | if (gfc_match_char (',') != MATCH_YES) | |
304 | goto syntax; | |
305 | } | |
306 | ||
307 | return MATCH_YES; | |
308 | ||
309 | syntax: | |
310 | gfc_syntax_error (ST_DATA); | |
af29c1f0 | 311 | gfc_free_data_all (gfc_current_ns); |
b4f45d02 | 312 | return MATCH_ERROR; |
313 | } | |
314 | ||
315 | ||
316 | static match | |
1a9745d2 | 317 | match_data_constant (gfc_expr **result) |
b4f45d02 | 318 | { |
319 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
320 | gfc_symbol *sym; | |
321 | gfc_expr *expr; | |
322 | match m; | |
096d4ad9 | 323 | locus old_loc; |
b4f45d02 | 324 | |
325 | m = gfc_match_literal_constant (&expr, 1); | |
326 | if (m == MATCH_YES) | |
327 | { | |
328 | *result = expr; | |
329 | return MATCH_YES; | |
330 | } | |
331 | ||
332 | if (m == MATCH_ERROR) | |
333 | return MATCH_ERROR; | |
334 | ||
335 | m = gfc_match_null (result); | |
336 | if (m != MATCH_NO) | |
337 | return m; | |
338 | ||
096d4ad9 | 339 | old_loc = gfc_current_locus; |
340 | ||
341 | /* Should this be a structure component, try to match it | |
342 | before matching a name. */ | |
343 | m = gfc_match_rvalue (result); | |
344 | if (m == MATCH_ERROR) | |
345 | return m; | |
346 | ||
347 | if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE) | |
348 | { | |
349 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
350 | m = MATCH_ERROR; | |
351 | return m; | |
352 | } | |
353 | ||
354 | gfc_current_locus = old_loc; | |
355 | ||
b4f45d02 | 356 | m = gfc_match_name (name); |
357 | if (m != MATCH_YES) | |
358 | return m; | |
359 | ||
360 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
361 | return MATCH_ERROR; | |
362 | ||
363 | if (sym == NULL | |
364 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
365 | { | |
366 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
367 | name); | |
368 | return MATCH_ERROR; | |
369 | } | |
370 | else if (sym->attr.flavor == FL_DERIVED) | |
371 | return gfc_match_structure_constructor (sym, result); | |
372 | ||
373 | *result = gfc_copy_expr (sym->value); | |
374 | return MATCH_YES; | |
375 | } | |
376 | ||
377 | ||
378 | /* Match a list of values in a DATA statement. The leading '/' has | |
379 | already been seen at this point. */ | |
380 | ||
381 | static match | |
1a9745d2 | 382 | top_val_list (gfc_data *data) |
b4f45d02 | 383 | { |
384 | gfc_data_value *new, *tail; | |
385 | gfc_expr *expr; | |
b4f45d02 | 386 | match m; |
387 | ||
388 | tail = NULL; | |
389 | ||
390 | for (;;) | |
391 | { | |
392 | m = match_data_constant (&expr); | |
393 | if (m == MATCH_NO) | |
394 | goto syntax; | |
395 | if (m == MATCH_ERROR) | |
396 | return MATCH_ERROR; | |
397 | ||
398 | new = gfc_get_data_value (); | |
7d74abfd | 399 | mpz_init (new->repeat); |
b4f45d02 | 400 | |
401 | if (tail == NULL) | |
402 | data->value = new; | |
403 | else | |
404 | tail->next = new; | |
405 | ||
406 | tail = new; | |
407 | ||
408 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
409 | { | |
410 | tail->expr = expr; | |
7d74abfd | 411 | mpz_set_ui (tail->repeat, 1); |
b4f45d02 | 412 | } |
413 | else | |
414 | { | |
7d74abfd | 415 | if (expr->ts.type == BT_INTEGER) |
416 | mpz_set (tail->repeat, expr->value.integer); | |
b4f45d02 | 417 | gfc_free_expr (expr); |
b4f45d02 | 418 | |
419 | m = match_data_constant (&tail->expr); | |
420 | if (m == MATCH_NO) | |
421 | goto syntax; | |
422 | if (m == MATCH_ERROR) | |
423 | return MATCH_ERROR; | |
424 | } | |
425 | ||
426 | if (gfc_match_char ('/') == MATCH_YES) | |
427 | break; | |
428 | if (gfc_match_char (',') == MATCH_NO) | |
429 | goto syntax; | |
430 | } | |
431 | ||
432 | return MATCH_YES; | |
433 | ||
434 | syntax: | |
435 | gfc_syntax_error (ST_DATA); | |
af29c1f0 | 436 | gfc_free_data_all (gfc_current_ns); |
b4f45d02 | 437 | return MATCH_ERROR; |
438 | } | |
439 | ||
440 | ||
441 | /* Matches an old style initialization. */ | |
442 | ||
443 | static match | |
444 | match_old_style_init (const char *name) | |
445 | { | |
446 | match m; | |
447 | gfc_symtree *st; | |
344b937e | 448 | gfc_symbol *sym; |
b4f45d02 | 449 | gfc_data *newdata; |
450 | ||
451 | /* Set up data structure to hold initializers. */ | |
452 | gfc_find_sym_tree (name, NULL, 0, &st); | |
344b937e | 453 | sym = st->n.sym; |
454 | ||
b4f45d02 | 455 | newdata = gfc_get_data (); |
456 | newdata->var = gfc_get_data_variable (); | |
457 | newdata->var->expr = gfc_get_variable_expr (st); | |
5aed5db3 | 458 | newdata->where = gfc_current_locus; |
b4f45d02 | 459 | |
f6d0e37a | 460 | /* Match initial value list. This also eats the terminal '/'. */ |
b4f45d02 | 461 | m = top_val_list (newdata); |
462 | if (m != MATCH_YES) | |
463 | { | |
464 | gfc_free (newdata); | |
465 | return m; | |
466 | } | |
467 | ||
468 | if (gfc_pure (NULL)) | |
469 | { | |
470 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
471 | gfc_free (newdata); | |
472 | return MATCH_ERROR; | |
473 | } | |
474 | ||
344b937e | 475 | /* Mark the variable as having appeared in a data statement. */ |
476 | if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) | |
477 | { | |
478 | gfc_free (newdata); | |
479 | return MATCH_ERROR; | |
480 | } | |
481 | ||
b4f45d02 | 482 | /* Chain in namespace list of DATA initializers. */ |
483 | newdata->next = gfc_current_ns->data; | |
484 | gfc_current_ns->data = newdata; | |
485 | ||
486 | return m; | |
487 | } | |
488 | ||
1a9745d2 | 489 | |
b4f45d02 | 490 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
39fca56b | 491 | we are matching a DATA statement and are therefore issuing an error |
e14bee04 | 492 | if we encounter something unexpected, if not, we're trying to match |
fe06c0d5 | 493 | an old-style initialization expression of the form INTEGER I /2/. */ |
b4f45d02 | 494 | |
495 | match | |
496 | gfc_match_data (void) | |
497 | { | |
498 | gfc_data *new; | |
499 | match m; | |
500 | ||
cbbac028 | 501 | set_in_match_data (true); |
1bfea7e8 | 502 | |
b4f45d02 | 503 | for (;;) |
504 | { | |
505 | new = gfc_get_data (); | |
506 | new->where = gfc_current_locus; | |
507 | ||
508 | m = top_var_list (new); | |
509 | if (m != MATCH_YES) | |
510 | goto cleanup; | |
511 | ||
512 | m = top_val_list (new); | |
513 | if (m != MATCH_YES) | |
514 | goto cleanup; | |
515 | ||
516 | new->next = gfc_current_ns->data; | |
517 | gfc_current_ns->data = new; | |
518 | ||
519 | if (gfc_match_eos () == MATCH_YES) | |
520 | break; | |
521 | ||
522 | gfc_match_char (','); /* Optional comma */ | |
523 | } | |
524 | ||
cbbac028 | 525 | set_in_match_data (false); |
1bfea7e8 | 526 | |
b4f45d02 | 527 | if (gfc_pure (NULL)) |
528 | { | |
529 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
530 | return MATCH_ERROR; | |
531 | } | |
532 | ||
533 | return MATCH_YES; | |
534 | ||
535 | cleanup: | |
cbbac028 | 536 | set_in_match_data (false); |
b4f45d02 | 537 | gfc_free_data (new); |
538 | return MATCH_ERROR; | |
539 | } | |
540 | ||
541 | ||
542 | /************************ Declaration statements *********************/ | |
543 | ||
4ee9c684 | 544 | /* Match an intent specification. Since this can only happen after an |
545 | INTENT word, a legal intent-spec must follow. */ | |
546 | ||
547 | static sym_intent | |
548 | match_intent_spec (void) | |
549 | { | |
550 | ||
551 | if (gfc_match (" ( in out )") == MATCH_YES) | |
552 | return INTENT_INOUT; | |
553 | if (gfc_match (" ( in )") == MATCH_YES) | |
554 | return INTENT_IN; | |
555 | if (gfc_match (" ( out )") == MATCH_YES) | |
556 | return INTENT_OUT; | |
557 | ||
558 | gfc_error ("Bad INTENT specification at %C"); | |
559 | return INTENT_UNKNOWN; | |
560 | } | |
561 | ||
562 | ||
563 | /* Matches a character length specification, which is either a | |
564 | specification expression or a '*'. */ | |
565 | ||
566 | static match | |
1a9745d2 | 567 | char_len_param_value (gfc_expr **expr) |
4ee9c684 | 568 | { |
294d58d3 | 569 | match m; |
570 | ||
4ee9c684 | 571 | if (gfc_match_char ('*') == MATCH_YES) |
572 | { | |
573 | *expr = NULL; | |
574 | return MATCH_YES; | |
575 | } | |
576 | ||
294d58d3 | 577 | m = gfc_match_expr (expr); |
578 | if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION) | |
579 | { | |
580 | if ((*expr)->value.function.actual | |
581 | && (*expr)->value.function.actual->expr->symtree) | |
582 | { | |
583 | gfc_expr *e; | |
584 | e = (*expr)->value.function.actual->expr; | |
585 | if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE | |
586 | && e->expr_type == EXPR_VARIABLE) | |
587 | { | |
588 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) | |
589 | goto syntax; | |
590 | if (e->symtree->n.sym->ts.type == BT_CHARACTER | |
591 | && e->symtree->n.sym->ts.cl | |
592 | && e->symtree->n.sym->ts.cl->length->ts.type == BT_UNKNOWN) | |
593 | goto syntax; | |
594 | } | |
595 | } | |
596 | } | |
597 | return m; | |
598 | ||
599 | syntax: | |
600 | gfc_error ("Conflict in attributes of function argument at %C"); | |
601 | return MATCH_ERROR; | |
4ee9c684 | 602 | } |
603 | ||
604 | ||
605 | /* A character length is a '*' followed by a literal integer or a | |
606 | char_len_param_value in parenthesis. */ | |
607 | ||
608 | static match | |
1a9745d2 | 609 | match_char_length (gfc_expr **expr) |
4ee9c684 | 610 | { |
3bd3b616 | 611 | int length; |
4ee9c684 | 612 | match m; |
613 | ||
614 | m = gfc_match_char ('*'); | |
615 | if (m != MATCH_YES) | |
616 | return m; | |
617 | ||
3bd3b616 | 618 | m = gfc_match_small_literal_int (&length, NULL); |
4ee9c684 | 619 | if (m == MATCH_ERROR) |
620 | return m; | |
621 | ||
622 | if (m == MATCH_YES) | |
623 | { | |
624 | *expr = gfc_int_expr (length); | |
625 | return m; | |
626 | } | |
627 | ||
628 | if (gfc_match_char ('(') == MATCH_NO) | |
629 | goto syntax; | |
630 | ||
631 | m = char_len_param_value (expr); | |
632 | if (m == MATCH_ERROR) | |
633 | return m; | |
634 | if (m == MATCH_NO) | |
635 | goto syntax; | |
636 | ||
637 | if (gfc_match_char (')') == MATCH_NO) | |
638 | { | |
639 | gfc_free_expr (*expr); | |
640 | *expr = NULL; | |
641 | goto syntax; | |
642 | } | |
643 | ||
644 | return MATCH_YES; | |
645 | ||
646 | syntax: | |
647 | gfc_error ("Syntax error in character length specification at %C"); | |
648 | return MATCH_ERROR; | |
649 | } | |
650 | ||
651 | ||
ee893be6 | 652 | /* Special subroutine for finding a symbol. Check if the name is found |
653 | in the current name space. If not, and we're compiling a function or | |
654 | subroutine and the parent compilation unit is an interface, then check | |
655 | to see if the name we've been given is the name of the interface | |
656 | (located in another namespace). */ | |
4ee9c684 | 657 | |
658 | static int | |
1a9745d2 | 659 | find_special (const char *name, gfc_symbol **result) |
4ee9c684 | 660 | { |
661 | gfc_state_data *s; | |
ee893be6 | 662 | int i; |
4ee9c684 | 663 | |
ee893be6 | 664 | i = gfc_get_symbol (name, NULL, result); |
e14bee04 | 665 | if (i == 0) |
ee893be6 | 666 | goto end; |
e14bee04 | 667 | |
4ee9c684 | 668 | if (gfc_current_state () != COMP_SUBROUTINE |
669 | && gfc_current_state () != COMP_FUNCTION) | |
ee893be6 | 670 | goto end; |
4ee9c684 | 671 | |
672 | s = gfc_state_stack->previous; | |
673 | if (s == NULL) | |
ee893be6 | 674 | goto end; |
4ee9c684 | 675 | |
676 | if (s->state != COMP_INTERFACE) | |
ee893be6 | 677 | goto end; |
4ee9c684 | 678 | if (s->sym == NULL) |
f6d0e37a | 679 | goto end; /* Nameless interface. */ |
4ee9c684 | 680 | |
681 | if (strcmp (name, s->sym->name) == 0) | |
682 | { | |
683 | *result = s->sym; | |
684 | return 0; | |
685 | } | |
686 | ||
ee893be6 | 687 | end: |
688 | return i; | |
4ee9c684 | 689 | } |
690 | ||
691 | ||
692 | /* Special subroutine for getting a symbol node associated with a | |
693 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
694 | symbol is created in the parent using with symtree node in the | |
695 | child unit pointing to the symbol. If the current namespace has no | |
696 | parent, then the symbol is just created in the current unit. */ | |
697 | ||
698 | static int | |
1a9745d2 | 699 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
4ee9c684 | 700 | { |
701 | gfc_symtree *st; | |
702 | gfc_symbol *sym; | |
2ddb8ed9 | 703 | int rc = 0; |
4ee9c684 | 704 | |
d77f260f | 705 | /* Module functions have to be left in their own namespace because |
706 | they have potentially (almost certainly!) already been referenced. | |
707 | In this sense, they are rather like external functions. This is | |
708 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
709 | space is set to point to the master function, so that the fake | |
710 | result mechanism can work. */ | |
711 | if (module_fcn_entry) | |
861d824f | 712 | { |
713 | /* Present if entry is declared to be a module procedure. */ | |
714 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); | |
c6a05992 | 715 | |
861d824f | 716 | if (*result == NULL) |
717 | rc = gfc_get_symbol (name, NULL, result); | |
c6a05992 | 718 | else if (gfc_get_symbol (name, NULL, &sym) == 0 |
719 | && sym | |
720 | && sym->ts.type != BT_UNKNOWN | |
721 | && (*result)->ts.type == BT_UNKNOWN | |
722 | && sym->attr.flavor == FL_UNKNOWN) | |
723 | /* Pick up the typespec for the entry, if declared in the function | |
724 | body. Note that this symbol is FL_UNKNOWN because it will | |
725 | only have appeared in a type declaration. The local symtree | |
726 | is set to point to the module symbol and a unique symtree | |
727 | to the local version. This latter ensures a correct clearing | |
728 | of the symbols. */ | |
729 | { | |
730 | (*result)->ts = sym->ts; | |
731 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); | |
732 | st->n.sym = *result; | |
733 | st = gfc_get_unique_symtree (gfc_current_ns); | |
734 | st->n.sym = sym; | |
735 | } | |
861d824f | 736 | } |
858f9894 | 737 | else |
738 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
4ee9c684 | 739 | |
2ddb8ed9 | 740 | if (rc) |
741 | return rc; | |
742 | ||
858f9894 | 743 | sym = *result; |
c717e399 | 744 | gfc_current_ns->refs++; |
4ee9c684 | 745 | |
858f9894 | 746 | if (sym && !sym->new && gfc_current_state () != COMP_INTERFACE) |
747 | { | |
16f49153 | 748 | /* Trap another encompassed procedure with the same name. All |
749 | these conditions are necessary to avoid picking up an entry | |
750 | whose name clashes with that of the encompassing procedure; | |
751 | this is handled using gsymbols to register unique,globally | |
752 | accessible names. */ | |
858f9894 | 753 | if (sym->attr.flavor != 0 |
1a9745d2 | 754 | && sym->attr.proc != 0 |
755 | && (sym->attr.subroutine || sym->attr.function) | |
756 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
858f9894 | 757 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
758 | name, &sym->declared_at); | |
759 | ||
5720fd2f | 760 | /* Trap a procedure with a name the same as interface in the |
761 | encompassing scope. */ | |
762 | if (sym->attr.generic != 0 | |
db697236 | 763 | && (sym->attr.subroutine || sym->attr.function) |
764 | && !sym->attr.mod_proc) | |
5720fd2f | 765 | gfc_error_now ("Name '%s' at %C is already defined" |
766 | " as a generic interface at %L", | |
767 | name, &sym->declared_at); | |
768 | ||
858f9894 | 769 | /* Trap declarations of attributes in encompassing scope. The |
770 | signature for this is that ts.kind is set. Legitimate | |
771 | references only set ts.type. */ | |
772 | if (sym->ts.kind != 0 | |
1a9745d2 | 773 | && !sym->attr.implicit_type |
774 | && sym->attr.proc == 0 | |
775 | && gfc_current_ns->parent != NULL | |
776 | && sym->attr.access == 0 | |
777 | && !module_fcn_entry) | |
778 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
779 | "and must not have attributes declared at %L", | |
858f9894 | 780 | name, &sym->declared_at); |
781 | } | |
782 | ||
783 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
784 | return rc; | |
4ee9c684 | 785 | |
d77f260f | 786 | /* Module function entries will already have a symtree in |
787 | the current namespace but will need one at module level. */ | |
788 | if (module_fcn_entry) | |
861d824f | 789 | { |
790 | /* Present if entry is declared to be a module procedure. */ | |
791 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); | |
792 | if (st == NULL) | |
793 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
794 | } | |
d77f260f | 795 | else |
796 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
4ee9c684 | 797 | |
4ee9c684 | 798 | st->n.sym = sym; |
799 | sym->refs++; | |
800 | ||
f6d0e37a | 801 | /* See if the procedure should be a module procedure. */ |
4ee9c684 | 802 | |
d77f260f | 803 | if (((sym->ns->proc_name != NULL |
861d824f | 804 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
805 | && sym->attr.proc != PROC_MODULE) | |
806 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) | |
807 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
808 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 809 | rc = 2; |
810 | ||
811 | return rc; | |
812 | } | |
813 | ||
814 | ||
c5d33754 | 815 | /* Verify that the given symbol representing a parameter is C |
816 | interoperable, by checking to see if it was marked as such after | |
817 | its declaration. If the given symbol is not interoperable, a | |
818 | warning is reported, thus removing the need to return the status to | |
819 | the calling function. The standard does not require the user use | |
820 | one of the iso_c_binding named constants to declare an | |
821 | interoperable parameter, but we can't be sure if the param is C | |
822 | interop or not if the user doesn't. For example, integer(4) may be | |
823 | legal Fortran, but doesn't have meaning in C. It may interop with | |
824 | a number of the C types, which causes a problem because the | |
825 | compiler can't know which one. This code is almost certainly not | |
826 | portable, and the user will get what they deserve if the C type | |
827 | across platforms isn't always interoperable with integer(4). If | |
828 | the user had used something like integer(c_int) or integer(c_long), | |
829 | the compiler could have automatically handled the varying sizes | |
830 | across platforms. */ | |
831 | ||
832 | try | |
833 | verify_c_interop_param (gfc_symbol *sym) | |
834 | { | |
835 | int is_c_interop = 0; | |
836 | try retval = SUCCESS; | |
837 | ||
838 | /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). | |
839 | Don't repeat the checks here. */ | |
840 | if (sym->attr.implicit_type) | |
841 | return SUCCESS; | |
842 | ||
843 | /* For subroutines or functions that are passed to a BIND(C) procedure, | |
844 | they're interoperable if they're BIND(C) and their params are all | |
845 | interoperable. */ | |
846 | if (sym->attr.flavor == FL_PROCEDURE) | |
847 | { | |
848 | if (sym->attr.is_bind_c == 0) | |
849 | { | |
850 | gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " | |
851 | "attribute to be C interoperable", sym->name, | |
852 | &(sym->declared_at)); | |
853 | ||
854 | return FAILURE; | |
855 | } | |
856 | else | |
857 | { | |
858 | if (sym->attr.is_c_interop == 1) | |
859 | /* We've already checked this procedure; don't check it again. */ | |
860 | return SUCCESS; | |
861 | else | |
862 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, | |
863 | sym->common_block); | |
864 | } | |
865 | } | |
866 | ||
867 | /* See if we've stored a reference to a procedure that owns sym. */ | |
868 | if (sym->ns != NULL && sym->ns->proc_name != NULL) | |
869 | { | |
870 | if (sym->ns->proc_name->attr.is_bind_c == 1) | |
871 | { | |
872 | is_c_interop = | |
873 | (verify_c_interop (&(sym->ts), sym->name, &(sym->declared_at)) | |
874 | == SUCCESS ? 1 : 0); | |
875 | ||
876 | if (is_c_interop != 1) | |
877 | { | |
878 | /* Make personalized messages to give better feedback. */ | |
879 | if (sym->ts.type == BT_DERIVED) | |
880 | gfc_error ("Type '%s' at %L is a parameter to the BIND(C) " | |
881 | " procedure '%s' but is not C interoperable " | |
882 | "because derived type '%s' is not C interoperable", | |
883 | sym->name, &(sym->declared_at), | |
884 | sym->ns->proc_name->name, | |
885 | sym->ts.derived->name); | |
886 | else | |
887 | gfc_warning ("Variable '%s' at %L is a parameter to the " | |
888 | "BIND(C) procedure '%s' but may not be C " | |
889 | "interoperable", | |
890 | sym->name, &(sym->declared_at), | |
891 | sym->ns->proc_name->name); | |
892 | } | |
e4eda3ec | 893 | |
894 | /* Character strings are only C interoperable if they have a | |
895 | length of 1. */ | |
896 | if (sym->ts.type == BT_CHARACTER) | |
897 | { | |
898 | gfc_charlen *cl = sym->ts.cl; | |
899 | if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT | |
900 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) | |
901 | { | |
902 | gfc_error ("Character argument '%s' at %L " | |
903 | "must be length 1 because " | |
904 | "procedure '%s' is BIND(C)", | |
905 | sym->name, &sym->declared_at, | |
906 | sym->ns->proc_name->name); | |
907 | retval = FAILURE; | |
908 | } | |
909 | } | |
910 | ||
c5d33754 | 911 | /* We have to make sure that any param to a bind(c) routine does |
912 | not have the allocatable, pointer, or optional attributes, | |
913 | according to J3/04-007, section 5.1. */ | |
914 | if (sym->attr.allocatable == 1) | |
915 | { | |
916 | gfc_error ("Variable '%s' at %L cannot have the " | |
917 | "ALLOCATABLE attribute because procedure '%s'" | |
918 | " is BIND(C)", sym->name, &(sym->declared_at), | |
919 | sym->ns->proc_name->name); | |
920 | retval = FAILURE; | |
921 | } | |
922 | ||
923 | if (sym->attr.pointer == 1) | |
924 | { | |
925 | gfc_error ("Variable '%s' at %L cannot have the " | |
926 | "POINTER attribute because procedure '%s'" | |
927 | " is BIND(C)", sym->name, &(sym->declared_at), | |
928 | sym->ns->proc_name->name); | |
929 | retval = FAILURE; | |
930 | } | |
931 | ||
932 | if (sym->attr.optional == 1) | |
933 | { | |
934 | gfc_error ("Variable '%s' at %L cannot have the " | |
935 | "OPTIONAL attribute because procedure '%s'" | |
936 | " is BIND(C)", sym->name, &(sym->declared_at), | |
937 | sym->ns->proc_name->name); | |
938 | retval = FAILURE; | |
939 | } | |
940 | ||
941 | /* Make sure that if it has the dimension attribute, that it is | |
942 | either assumed size or explicit shape. */ | |
943 | if (sym->as != NULL) | |
944 | { | |
945 | if (sym->as->type == AS_ASSUMED_SHAPE) | |
946 | { | |
947 | gfc_error ("Assumed-shape array '%s' at %L cannot be an " | |
948 | "argument to the procedure '%s' at %L because " | |
949 | "the procedure is BIND(C)", sym->name, | |
950 | &(sym->declared_at), sym->ns->proc_name->name, | |
951 | &(sym->ns->proc_name->declared_at)); | |
952 | retval = FAILURE; | |
953 | } | |
954 | ||
955 | if (sym->as->type == AS_DEFERRED) | |
956 | { | |
957 | gfc_error ("Deferred-shape array '%s' at %L cannot be an " | |
958 | "argument to the procedure '%s' at %L because " | |
959 | "the procedure is BIND(C)", sym->name, | |
960 | &(sym->declared_at), sym->ns->proc_name->name, | |
961 | &(sym->ns->proc_name->declared_at)); | |
962 | retval = FAILURE; | |
963 | } | |
964 | } | |
965 | } | |
966 | } | |
967 | ||
968 | return retval; | |
969 | } | |
970 | ||
971 | ||
972 | /* Function called by variable_decl() that adds a name to the symbol table. */ | |
4ee9c684 | 973 | |
974 | static try | |
1a9745d2 | 975 | build_sym (const char *name, gfc_charlen *cl, |
976 | gfc_array_spec **as, locus *var_locus) | |
4ee9c684 | 977 | { |
978 | symbol_attribute attr; | |
979 | gfc_symbol *sym; | |
980 | ||
ee893be6 | 981 | if (gfc_get_symbol (name, NULL, &sym)) |
4ee9c684 | 982 | return FAILURE; |
983 | ||
f6d0e37a | 984 | /* Start updating the symbol table. Add basic type attribute if present. */ |
4ee9c684 | 985 | if (current_ts.type != BT_UNKNOWN |
1a9745d2 | 986 | && (sym->attr.implicit_type == 0 |
987 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
4ee9c684 | 988 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
989 | return FAILURE; | |
990 | ||
991 | if (sym->ts.type == BT_CHARACTER) | |
992 | sym->ts.cl = cl; | |
993 | ||
994 | /* Add dimension attribute if present. */ | |
995 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
996 | return FAILURE; | |
997 | *as = NULL; | |
998 | ||
999 | /* Add attribute to symbol. The copy is so that we can reset the | |
1000 | dimension attribute. */ | |
1001 | attr = current_attr; | |
1002 | attr.dimension = 0; | |
1003 | ||
1004 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
1005 | return FAILURE; | |
1006 | ||
c5d33754 | 1007 | /* Finish any work that may need to be done for the binding label, |
1008 | if it's a bind(c). The bind(c) attr is found before the symbol | |
1009 | is made, and before the symbol name (for data decls), so the | |
1010 | current_ts is holding the binding label, or nothing if the | |
1011 | name= attr wasn't given. Therefore, test here if we're dealing | |
1012 | with a bind(c) and make sure the binding label is set correctly. */ | |
1013 | if (sym->attr.is_bind_c == 1) | |
1014 | { | |
1015 | if (sym->binding_label[0] == '\0') | |
1016 | { | |
825718f9 | 1017 | /* Set the binding label and verify that if a NAME= was specified |
1018 | then only one identifier was in the entity-decl-list. */ | |
1019 | if (set_binding_label (sym->binding_label, sym->name, | |
1020 | num_idents_on_line) == FAILURE) | |
c5d33754 | 1021 | return FAILURE; |
1022 | } | |
1023 | } | |
1024 | ||
1025 | /* See if we know we're in a common block, and if it's a bind(c) | |
1026 | common then we need to make sure we're an interoperable type. */ | |
1027 | if (sym->attr.in_common == 1) | |
1028 | { | |
1029 | /* Test the common block object. */ | |
1030 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 | |
1031 | && sym->ts.is_c_interop != 1) | |
1032 | { | |
1033 | gfc_error_now ("Variable '%s' in common block '%s' at %C " | |
1034 | "must be declared with a C interoperable " | |
1035 | "kind since common block '%s' is BIND(C)", | |
1036 | sym->name, sym->common_block->name, | |
1037 | sym->common_block->name); | |
1038 | gfc_clear_error (); | |
1039 | } | |
1040 | } | |
1041 | ||
2457a77e | 1042 | sym->attr.implied_index = 0; |
1043 | ||
4ee9c684 | 1044 | return SUCCESS; |
1045 | } | |
1046 | ||
1a9745d2 | 1047 | |
a270dc8e | 1048 | /* Set character constant to the given length. The constant will be padded or |
1049 | truncated. */ | |
1050 | ||
1051 | void | |
1a9745d2 | 1052 | gfc_set_constant_character_len (int len, gfc_expr *expr, bool array) |
a270dc8e | 1053 | { |
1a9745d2 | 1054 | char *s; |
a270dc8e | 1055 | int slen; |
1056 | ||
1057 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
1058 | gcc_assert (expr->ts.type == BT_CHARACTER && expr->ts.kind == 1); | |
1059 | ||
1060 | slen = expr->value.character.length; | |
1061 | if (len != slen) | |
1062 | { | |
89f528df | 1063 | s = gfc_getmem (len + 1); |
a270dc8e | 1064 | memcpy (s, expr->value.character.string, MIN (len, slen)); |
1065 | if (len > slen) | |
1066 | memset (&s[slen], ' ', len - slen); | |
1bfea7e8 | 1067 | |
1068 | if (gfc_option.warn_character_truncation && slen > len) | |
1069 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
1070 | "(%d/%d)", &expr->where, slen, len); | |
1071 | ||
1072 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
1073 | initializers. */ | |
1074 | if (array && slen < len && !(gfc_option.allow_std & GFC_STD_GNU)) | |
1075 | gfc_error_now ("The CHARACTER elements of the array constructor " | |
1076 | "at %L must have the same length (%d/%d)", | |
1a9745d2 | 1077 | &expr->where, slen, len); |
1bfea7e8 | 1078 | |
89f528df | 1079 | s[len] = '\0'; |
a270dc8e | 1080 | gfc_free (expr->value.character.string); |
1081 | expr->value.character.string = s; | |
1082 | expr->value.character.length = len; | |
1083 | } | |
1084 | } | |
4ee9c684 | 1085 | |
3b6a4b41 | 1086 | |
e14bee04 | 1087 | /* Function to create and update the enumerator history |
3b6a4b41 | 1088 | using the information passed as arguments. |
e14bee04 | 1089 | Pointer "max_enum" is also updated, to point to |
1090 | enum history node containing largest initializer. | |
3b6a4b41 | 1091 | |
1092 | SYM points to the symbol node of enumerator. | |
f6d0e37a | 1093 | INIT points to its enumerator value. */ |
3b6a4b41 | 1094 | |
e14bee04 | 1095 | static void |
1a9745d2 | 1096 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
3b6a4b41 | 1097 | { |
1098 | enumerator_history *new_enum_history; | |
1099 | gcc_assert (sym != NULL && init != NULL); | |
1100 | ||
1101 | new_enum_history = gfc_getmem (sizeof (enumerator_history)); | |
1102 | ||
1103 | new_enum_history->sym = sym; | |
1104 | new_enum_history->initializer = init; | |
1105 | new_enum_history->next = NULL; | |
1106 | ||
1107 | if (enum_history == NULL) | |
1108 | { | |
1109 | enum_history = new_enum_history; | |
1110 | max_enum = enum_history; | |
1111 | } | |
1112 | else | |
1113 | { | |
1114 | new_enum_history->next = enum_history; | |
1115 | enum_history = new_enum_history; | |
1116 | ||
e14bee04 | 1117 | if (mpz_cmp (max_enum->initializer->value.integer, |
3b6a4b41 | 1118 | new_enum_history->initializer->value.integer) < 0) |
1a9745d2 | 1119 | max_enum = new_enum_history; |
3b6a4b41 | 1120 | } |
1121 | } | |
1122 | ||
1123 | ||
e14bee04 | 1124 | /* Function to free enum kind history. */ |
3b6a4b41 | 1125 | |
e14bee04 | 1126 | void |
1a9745d2 | 1127 | gfc_free_enum_history (void) |
3b6a4b41 | 1128 | { |
e14bee04 | 1129 | enumerator_history *current = enum_history; |
1130 | enumerator_history *next; | |
3b6a4b41 | 1131 | |
1132 | while (current != NULL) | |
1133 | { | |
1134 | next = current->next; | |
1135 | gfc_free (current); | |
1136 | current = next; | |
1137 | } | |
1138 | max_enum = NULL; | |
1139 | enum_history = NULL; | |
1140 | } | |
1141 | ||
1142 | ||
4ee9c684 | 1143 | /* Function called by variable_decl() that adds an initialization |
1144 | expression to a symbol. */ | |
1145 | ||
1146 | static try | |
f6d0e37a | 1147 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) |
4ee9c684 | 1148 | { |
1149 | symbol_attribute attr; | |
1150 | gfc_symbol *sym; | |
1151 | gfc_expr *init; | |
1152 | ||
1153 | init = *initp; | |
1154 | if (find_special (name, &sym)) | |
1155 | return FAILURE; | |
1156 | ||
1157 | attr = sym->attr; | |
1158 | ||
1159 | /* If this symbol is confirming an implicit parameter type, | |
1160 | then an initialization expression is not allowed. */ | |
1161 | if (attr.flavor == FL_PARAMETER | |
1162 | && sym->value != NULL | |
1163 | && *initp != NULL) | |
1164 | { | |
1165 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
1166 | sym->name); | |
1167 | return FAILURE; | |
1168 | } | |
1169 | ||
6cbc841e | 1170 | if (attr.in_common |
1171 | && !attr.data | |
1172 | && *initp != NULL) | |
1173 | { | |
1174 | gfc_error ("Initializer not allowed for COMMON variable '%s' at %C", | |
1175 | sym->name); | |
1176 | return FAILURE; | |
1177 | } | |
1178 | ||
4ee9c684 | 1179 | if (init == NULL) |
1180 | { | |
1181 | /* An initializer is required for PARAMETER declarations. */ | |
1182 | if (attr.flavor == FL_PARAMETER) | |
1183 | { | |
1184 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
1185 | return FAILURE; | |
1186 | } | |
1187 | } | |
1188 | else | |
1189 | { | |
1190 | /* If a variable appears in a DATA block, it cannot have an | |
b97f1a18 | 1191 | initializer. */ |
4ee9c684 | 1192 | if (sym->attr.data) |
1193 | { | |
1a9745d2 | 1194 | gfc_error ("Variable '%s' at %C with an initializer already " |
1195 | "appears in a DATA statement", sym->name); | |
4ee9c684 | 1196 | return FAILURE; |
1197 | } | |
1198 | ||
cca3db55 | 1199 | /* Check if the assignment can happen. This has to be put off |
1200 | until later for a derived type variable. */ | |
4ee9c684 | 1201 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
1202 | && gfc_check_assign_symbol (sym, init) == FAILURE) | |
1203 | return FAILURE; | |
1204 | ||
a270dc8e | 1205 | if (sym->ts.type == BT_CHARACTER && sym->ts.cl) |
1206 | { | |
1207 | /* Update symbol character length according initializer. */ | |
1208 | if (sym->ts.cl->length == NULL) | |
1209 | { | |
03c2a028 | 1210 | int clen; |
f6d0e37a | 1211 | /* If there are multiple CHARACTER variables declared on the |
1212 | same line, we don't want them to share the same length. */ | |
ea13b9b7 | 1213 | sym->ts.cl = gfc_get_charlen (); |
1214 | sym->ts.cl->next = gfc_current_ns->cl_list; | |
1215 | gfc_current_ns->cl_list = sym->ts.cl; | |
e9c873a4 | 1216 | |
03c2a028 | 1217 | if (sym->attr.flavor == FL_PARAMETER) |
1218 | { | |
1219 | if (init->expr_type == EXPR_CONSTANT) | |
1220 | { | |
1221 | clen = init->value.character.length; | |
1222 | sym->ts.cl->length = gfc_int_expr (clen); | |
1223 | } | |
1224 | else if (init->expr_type == EXPR_ARRAY) | |
1225 | { | |
1226 | gfc_expr *p = init->value.constructor->expr; | |
1227 | clen = p->value.character.length; | |
1228 | sym->ts.cl->length = gfc_int_expr (clen); | |
1229 | } | |
1230 | else if (init->ts.cl && init->ts.cl->length) | |
1231 | sym->ts.cl->length = | |
1232 | gfc_copy_expr (sym->value->ts.cl->length); | |
1233 | } | |
a270dc8e | 1234 | } |
1235 | /* Update initializer character length according symbol. */ | |
1236 | else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT) | |
1237 | { | |
1238 | int len = mpz_get_si (sym->ts.cl->length->value.integer); | |
1239 | gfc_constructor * p; | |
1240 | ||
1241 | if (init->expr_type == EXPR_CONSTANT) | |
1bfea7e8 | 1242 | gfc_set_constant_character_len (len, init, false); |
a270dc8e | 1243 | else if (init->expr_type == EXPR_ARRAY) |
1244 | { | |
39908fd9 | 1245 | /* Build a new charlen to prevent simplification from |
1246 | deleting the length before it is resolved. */ | |
1247 | init->ts.cl = gfc_get_charlen (); | |
1248 | init->ts.cl->next = gfc_current_ns->cl_list; | |
1249 | gfc_current_ns->cl_list = sym->ts.cl; | |
a270dc8e | 1250 | init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length); |
39908fd9 | 1251 | |
a270dc8e | 1252 | for (p = init->value.constructor; p; p = p->next) |
1bfea7e8 | 1253 | gfc_set_constant_character_len (len, p->expr, false); |
a270dc8e | 1254 | } |
1255 | } | |
1256 | } | |
1257 | ||
c5d33754 | 1258 | /* Need to check if the expression we initialized this |
1259 | to was one of the iso_c_binding named constants. If so, | |
1260 | and we're a parameter (constant), let it be iso_c. | |
1261 | For example: | |
1262 | integer(c_int), parameter :: my_int = c_int | |
1263 | integer(my_int) :: my_int_2 | |
1264 | If we mark my_int as iso_c (since we can see it's value | |
1265 | is equal to one of the named constants), then my_int_2 | |
1266 | will be considered C interoperable. */ | |
1267 | if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) | |
1268 | { | |
1269 | sym->ts.is_iso_c |= init->ts.is_iso_c; | |
1270 | sym->ts.is_c_interop |= init->ts.is_c_interop; | |
1271 | /* attr bits needed for module files. */ | |
1272 | sym->attr.is_iso_c |= init->ts.is_iso_c; | |
1273 | sym->attr.is_c_interop |= init->ts.is_c_interop; | |
1274 | if (init->ts.is_iso_c) | |
1275 | sym->ts.f90_type = init->ts.f90_type; | |
1276 | } | |
1277 | ||
4ee9c684 | 1278 | /* Add initializer. Make sure we keep the ranks sane. */ |
1279 | if (sym->attr.dimension && init->rank == 0) | |
7baa3fb4 | 1280 | { |
1281 | mpz_t size; | |
1282 | gfc_expr *array; | |
1283 | gfc_constructor *c; | |
1284 | int n; | |
1285 | if (sym->attr.flavor == FL_PARAMETER | |
1286 | && init->expr_type == EXPR_CONSTANT | |
1287 | && spec_size (sym->as, &size) == SUCCESS | |
1288 | && mpz_cmp_si (size, 0) > 0) | |
1289 | { | |
1290 | array = gfc_start_constructor (init->ts.type, init->ts.kind, | |
1291 | &init->where); | |
1292 | ||
1293 | array->value.constructor = c = NULL; | |
1294 | for (n = 0; n < (int)mpz_get_si (size); n++) | |
1295 | { | |
1296 | if (array->value.constructor == NULL) | |
1297 | { | |
1298 | array->value.constructor = c = gfc_get_constructor (); | |
1299 | c->expr = init; | |
1300 | } | |
1301 | else | |
1302 | { | |
1303 | c->next = gfc_get_constructor (); | |
1304 | c = c->next; | |
1305 | c->expr = gfc_copy_expr (init); | |
1306 | } | |
1307 | } | |
1308 | ||
1309 | array->shape = gfc_get_shape (sym->as->rank); | |
1310 | for (n = 0; n < sym->as->rank; n++) | |
1311 | spec_dimen_size (sym->as, n, &array->shape[n]); | |
1312 | ||
1313 | init = array; | |
1314 | mpz_clear (size); | |
1315 | } | |
1316 | init->rank = sym->as->rank; | |
1317 | } | |
4ee9c684 | 1318 | |
1319 | sym->value = init; | |
3cd3c667 | 1320 | if (sym->attr.save == SAVE_NONE) |
1321 | sym->attr.save = SAVE_IMPLICIT; | |
4ee9c684 | 1322 | *initp = NULL; |
1323 | } | |
1324 | ||
1325 | return SUCCESS; | |
1326 | } | |
1327 | ||
1328 | ||
1329 | /* Function called by variable_decl() that adds a name to a structure | |
1330 | being built. */ | |
1331 | ||
1332 | static try | |
1a9745d2 | 1333 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
1334 | gfc_array_spec **as) | |
4ee9c684 | 1335 | { |
1336 | gfc_component *c; | |
1337 | ||
1338 | /* If the current symbol is of the same derived type that we're | |
1339 | constructing, it must have the pointer attribute. */ | |
1340 | if (current_ts.type == BT_DERIVED | |
1341 | && current_ts.derived == gfc_current_block () | |
1342 | && current_attr.pointer == 0) | |
1343 | { | |
1344 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1345 | return FAILURE; | |
1346 | } | |
1347 | ||
1a9745d2 | 1348 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
4ee9c684 | 1349 | { |
1350 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1351 | { | |
1352 | gfc_error ("Array component of structure at %C must have explicit " | |
1353 | "or deferred shape"); | |
1354 | return FAILURE; | |
1355 | } | |
1356 | } | |
1357 | ||
1358 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1359 | return FAILURE; | |
1360 | ||
1361 | c->ts = current_ts; | |
1362 | c->ts.cl = cl; | |
1363 | gfc_set_component_attr (c, ¤t_attr); | |
1364 | ||
1365 | c->initializer = *init; | |
1366 | *init = NULL; | |
1367 | ||
1368 | c->as = *as; | |
1369 | if (c->as != NULL) | |
1370 | c->dimension = 1; | |
1371 | *as = NULL; | |
1372 | ||
1373 | /* Check array components. */ | |
1374 | if (!c->dimension) | |
2294b616 | 1375 | { |
1376 | if (c->allocatable) | |
1377 | { | |
1378 | gfc_error ("Allocatable component at %C must be an array"); | |
1379 | return FAILURE; | |
1380 | } | |
1381 | else | |
1382 | return SUCCESS; | |
1383 | } | |
4ee9c684 | 1384 | |
1385 | if (c->pointer) | |
1386 | { | |
1387 | if (c->as->type != AS_DEFERRED) | |
1388 | { | |
2294b616 | 1389 | gfc_error ("Pointer array component of structure at %C must have a " |
1390 | "deferred shape"); | |
1391 | return FAILURE; | |
1392 | } | |
1393 | } | |
1394 | else if (c->allocatable) | |
1395 | { | |
1396 | if (c->as->type != AS_DEFERRED) | |
1397 | { | |
1398 | gfc_error ("Allocatable component of structure at %C must have a " | |
1399 | "deferred shape"); | |
4ee9c684 | 1400 | return FAILURE; |
1401 | } | |
1402 | } | |
1403 | else | |
1404 | { | |
1405 | if (c->as->type != AS_EXPLICIT) | |
1406 | { | |
1a9745d2 | 1407 | gfc_error ("Array component of structure at %C must have an " |
1408 | "explicit shape"); | |
4ee9c684 | 1409 | return FAILURE; |
1410 | } | |
1411 | } | |
1412 | ||
1413 | return SUCCESS; | |
1414 | } | |
1415 | ||
1416 | ||
1417 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1418 | ||
1419 | match | |
1a9745d2 | 1420 | gfc_match_null (gfc_expr **result) |
4ee9c684 | 1421 | { |
1422 | gfc_symbol *sym; | |
1423 | gfc_expr *e; | |
1424 | match m; | |
1425 | ||
1426 | m = gfc_match (" null ( )"); | |
1427 | if (m != MATCH_YES) | |
1428 | return m; | |
1429 | ||
1430 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1431 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1432 | { | |
1433 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1434 | return MATCH_ERROR; | |
1435 | } | |
1436 | ||
1437 | gfc_intrinsic_symbol (sym); | |
1438 | ||
1439 | if (sym->attr.proc != PROC_INTRINSIC | |
950683ed | 1440 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1441 | sym->name, NULL) == FAILURE | |
1442 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
4ee9c684 | 1443 | return MATCH_ERROR; |
1444 | ||
1445 | e = gfc_get_expr (); | |
cbb9e6aa | 1446 | e->where = gfc_current_locus; |
4ee9c684 | 1447 | e->expr_type = EXPR_NULL; |
1448 | e->ts.type = BT_UNKNOWN; | |
1449 | ||
1450 | *result = e; | |
1451 | ||
1452 | return MATCH_YES; | |
1453 | } | |
1454 | ||
1455 | ||
4ee9c684 | 1456 | /* Match a variable name with an optional initializer. When this |
1457 | subroutine is called, a variable is expected to be parsed next. | |
1458 | Depending on what is happening at the moment, updates either the | |
1459 | symbol table or the current interface. */ | |
1460 | ||
1461 | static match | |
3923b69f | 1462 | variable_decl (int elem) |
4ee9c684 | 1463 | { |
1464 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1465 | gfc_expr *initializer, *char_len; | |
1466 | gfc_array_spec *as; | |
b549d2a5 | 1467 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
4ee9c684 | 1468 | gfc_charlen *cl; |
1469 | locus var_locus; | |
1470 | match m; | |
1471 | try t; | |
b549d2a5 | 1472 | gfc_symbol *sym; |
3b6a4b41 | 1473 | locus old_locus; |
4ee9c684 | 1474 | |
1475 | initializer = NULL; | |
1476 | as = NULL; | |
b549d2a5 | 1477 | cp_as = NULL; |
3b6a4b41 | 1478 | old_locus = gfc_current_locus; |
4ee9c684 | 1479 | |
1480 | /* When we get here, we've just matched a list of attributes and | |
1481 | maybe a type and a double colon. The next thing we expect to see | |
1482 | is the name of the symbol. */ | |
1483 | m = gfc_match_name (name); | |
1484 | if (m != MATCH_YES) | |
1485 | goto cleanup; | |
1486 | ||
cbb9e6aa | 1487 | var_locus = gfc_current_locus; |
4ee9c684 | 1488 | |
1489 | /* Now we could see the optional array spec. or character length. */ | |
1490 | m = gfc_match_array_spec (&as); | |
b549d2a5 | 1491 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1492 | cp_as = gfc_copy_array_spec (as); | |
1493 | else if (m == MATCH_ERROR) | |
4ee9c684 | 1494 | goto cleanup; |
3b6a4b41 | 1495 | |
4ee9c684 | 1496 | if (m == MATCH_NO) |
1497 | as = gfc_copy_array_spec (current_as); | |
1498 | ||
1499 | char_len = NULL; | |
1500 | cl = NULL; | |
1501 | ||
1502 | if (current_ts.type == BT_CHARACTER) | |
1503 | { | |
1504 | switch (match_char_length (&char_len)) | |
1505 | { | |
1506 | case MATCH_YES: | |
1507 | cl = gfc_get_charlen (); | |
1508 | cl->next = gfc_current_ns->cl_list; | |
1509 | gfc_current_ns->cl_list = cl; | |
1510 | ||
1511 | cl->length = char_len; | |
1512 | break; | |
1513 | ||
3923b69f | 1514 | /* Non-constant lengths need to be copied after the first |
04b61f60 | 1515 | element. Also copy assumed lengths. */ |
4ee9c684 | 1516 | case MATCH_NO: |
04b61f60 | 1517 | if (elem > 1 |
1518 | && (current_ts.cl->length == NULL | |
1519 | || current_ts.cl->length->expr_type != EXPR_CONSTANT)) | |
3923b69f | 1520 | { |
1521 | cl = gfc_get_charlen (); | |
1522 | cl->next = gfc_current_ns->cl_list; | |
1523 | gfc_current_ns->cl_list = cl; | |
1524 | cl->length = gfc_copy_expr (current_ts.cl->length); | |
1525 | } | |
1526 | else | |
1527 | cl = current_ts.cl; | |
1528 | ||
4ee9c684 | 1529 | break; |
1530 | ||
1531 | case MATCH_ERROR: | |
1532 | goto cleanup; | |
1533 | } | |
1534 | } | |
1535 | ||
b549d2a5 | 1536 | /* If this symbol has already shown up in a Cray Pointer declaration, |
f6d0e37a | 1537 | then we want to set the type & bail out. */ |
b549d2a5 | 1538 | if (gfc_option.flag_cray_pointer) |
1539 | { | |
1540 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1541 | if (sym != NULL && sym->attr.cray_pointee) | |
1542 | { | |
1543 | sym->ts.type = current_ts.type; | |
1544 | sym->ts.kind = current_ts.kind; | |
1545 | sym->ts.cl = cl; | |
1546 | sym->ts.derived = current_ts.derived; | |
c5d33754 | 1547 | sym->ts.is_c_interop = current_ts.is_c_interop; |
1548 | sym->ts.is_iso_c = current_ts.is_iso_c; | |
b549d2a5 | 1549 | m = MATCH_YES; |
1550 | ||
1551 | /* Check to see if we have an array specification. */ | |
1552 | if (cp_as != NULL) | |
1553 | { | |
1554 | if (sym->as != NULL) | |
1555 | { | |
7698a624 | 1556 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 1557 | gfc_free_array_spec (cp_as); |
1558 | m = MATCH_ERROR; | |
1559 | goto cleanup; | |
1560 | } | |
1561 | else | |
1562 | { | |
1563 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1564 | gfc_internal_error ("Couldn't set pointee array spec."); | |
e14bee04 | 1565 | |
b549d2a5 | 1566 | /* Fix the array spec. */ |
e14bee04 | 1567 | m = gfc_mod_pointee_as (sym->as); |
b549d2a5 | 1568 | if (m == MATCH_ERROR) |
1569 | goto cleanup; | |
1570 | } | |
e14bee04 | 1571 | } |
b549d2a5 | 1572 | goto cleanup; |
1573 | } | |
1574 | else | |
1575 | { | |
1576 | gfc_free_array_spec (cp_as); | |
1577 | } | |
1578 | } | |
e14bee04 | 1579 | |
1580 | ||
4ee9c684 | 1581 | /* OK, we've successfully matched the declaration. Now put the |
1582 | symbol in the current namespace, because it might be used in the | |
fe06c0d5 | 1583 | optional initialization expression for this symbol, e.g. this is |
4ee9c684 | 1584 | perfectly legal: |
1585 | ||
1586 | integer, parameter :: i = huge(i) | |
1587 | ||
1588 | This is only true for parameters or variables of a basic type. | |
1589 | For components of derived types, it is not true, so we don't | |
1590 | create a symbol for those yet. If we fail to create the symbol, | |
1591 | bail out. */ | |
1592 | if (gfc_current_state () != COMP_DERIVED | |
1593 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1594 | { | |
b8a51d79 | 1595 | m = MATCH_ERROR; |
1596 | goto cleanup; | |
1597 | } | |
1598 | ||
60fbbf9e | 1599 | /* An interface body specifies all of the procedure's |
1600 | characteristics and these shall be consistent with those | |
1601 | specified in the procedure definition, except that the interface | |
1602 | may specify a procedure that is not pure if the procedure is | |
1603 | defined to be pure(12.3.2). */ | |
b8a51d79 | 1604 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1605 | && gfc_current_ns->proc_name |
1606 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
c723595c | 1607 | && current_ts.derived->ns != gfc_current_ns) |
1608 | { | |
1609 | gfc_symtree *st; | |
1610 | st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.derived->name); | |
1611 | if (!(current_ts.derived->attr.imported | |
1612 | && st != NULL | |
1613 | && st->n.sym == current_ts.derived) | |
1614 | && !gfc_current_ns->has_import_set) | |
1615 | { | |
1616 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1617 | "interface", name); | |
1618 | m = MATCH_ERROR; | |
1619 | goto cleanup; | |
1620 | } | |
4ee9c684 | 1621 | } |
1622 | ||
1623 | /* In functions that have a RESULT variable defined, the function | |
1624 | name always refers to function calls. Therefore, the name is | |
1625 | not allowed to appear in specification statements. */ | |
1626 | if (gfc_current_state () == COMP_FUNCTION | |
1627 | && gfc_current_block () != NULL | |
1628 | && gfc_current_block ()->result != NULL | |
1629 | && gfc_current_block ()->result != gfc_current_block () | |
1630 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1631 | { | |
1632 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1633 | m = MATCH_ERROR; | |
1634 | goto cleanup; | |
1635 | } | |
1636 | ||
b4f45d02 | 1637 | /* We allow old-style initializations of the form |
1638 | integer i /2/, j(4) /3*3, 1/ | |
1639 | (if no colon has been seen). These are different from data | |
1640 | statements in that initializers are only allowed to apply to the | |
1641 | variable immediately preceding, i.e. | |
1642 | integer i, j /1, 2/ | |
1643 | is not allowed. Therefore we have to do some work manually, that | |
cca3db55 | 1644 | could otherwise be left to the matchers for DATA statements. */ |
b4f45d02 | 1645 | |
1646 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1647 | { | |
1648 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1649 | "initialization at %C") == FAILURE) | |
1650 | return MATCH_ERROR; | |
e14bee04 | 1651 | |
b4f45d02 | 1652 | return match_old_style_init (name); |
1653 | } | |
1654 | ||
4ee9c684 | 1655 | /* The double colon must be present in order to have initializers. |
1656 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1657 | if (colon_seen) | |
1658 | { | |
1659 | if (gfc_match (" =>") == MATCH_YES) | |
1660 | { | |
4ee9c684 | 1661 | if (!current_attr.pointer) |
1662 | { | |
1663 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1664 | m = MATCH_ERROR; | |
1665 | goto cleanup; | |
1666 | } | |
1667 | ||
1668 | m = gfc_match_null (&initializer); | |
1669 | if (m == MATCH_NO) | |
1670 | { | |
e4789c62 | 1671 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
4ee9c684 | 1672 | m = MATCH_ERROR; |
1673 | } | |
1674 | ||
1675 | if (gfc_pure (NULL)) | |
1676 | { | |
1a9745d2 | 1677 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1678 | "a PURE procedure"); | |
4ee9c684 | 1679 | m = MATCH_ERROR; |
1680 | } | |
1681 | ||
1682 | if (m != MATCH_YES) | |
1683 | goto cleanup; | |
1684 | ||
4ee9c684 | 1685 | } |
1686 | else if (gfc_match_char ('=') == MATCH_YES) | |
1687 | { | |
1688 | if (current_attr.pointer) | |
1689 | { | |
1a9745d2 | 1690 | gfc_error ("Pointer initialization at %C requires '=>', " |
1691 | "not '='"); | |
4ee9c684 | 1692 | m = MATCH_ERROR; |
1693 | goto cleanup; | |
1694 | } | |
1695 | ||
1696 | m = gfc_match_init_expr (&initializer); | |
1697 | if (m == MATCH_NO) | |
1698 | { | |
1699 | gfc_error ("Expected an initialization expression at %C"); | |
1700 | m = MATCH_ERROR; | |
1701 | } | |
1702 | ||
1703 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1704 | { | |
1a9745d2 | 1705 | gfc_error ("Initialization of variable at %C is not allowed in " |
1706 | "a PURE procedure"); | |
4ee9c684 | 1707 | m = MATCH_ERROR; |
1708 | } | |
1709 | ||
1710 | if (m != MATCH_YES) | |
1711 | goto cleanup; | |
1712 | } | |
8ffad0f9 | 1713 | } |
1714 | ||
2294b616 | 1715 | if (initializer != NULL && current_attr.allocatable |
1716 | && gfc_current_state () == COMP_DERIVED) | |
1717 | { | |
1a9745d2 | 1718 | gfc_error ("Initialization of allocatable component at %C is not " |
1719 | "allowed"); | |
2294b616 | 1720 | m = MATCH_ERROR; |
1721 | goto cleanup; | |
1722 | } | |
1723 | ||
d9b3f26b | 1724 | /* Add the initializer. Note that it is fine if initializer is |
4ee9c684 | 1725 | NULL here, because we sometimes also need to check if a |
1726 | declaration *must* have an initialization expression. */ | |
1727 | if (gfc_current_state () != COMP_DERIVED) | |
1728 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1729 | else | |
d9b3f26b | 1730 | { |
2294b616 | 1731 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1732 | && !current_attr.pointer && !initializer) |
d9b3f26b | 1733 | initializer = gfc_default_initializer (¤t_ts); |
1734 | t = build_struct (name, cl, &initializer, &as); | |
1735 | } | |
4ee9c684 | 1736 | |
1737 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1738 | ||
1739 | cleanup: | |
1740 | /* Free stuff up and return. */ | |
1741 | gfc_free_expr (initializer); | |
1742 | gfc_free_array_spec (as); | |
1743 | ||
1744 | return m; | |
1745 | } | |
1746 | ||
1747 | ||
d10f89ee | 1748 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
1749 | This assumes that the byte size is equal to the kind number for | |
1750 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
4ee9c684 | 1751 | |
1752 | match | |
1a9745d2 | 1753 | gfc_match_old_kind_spec (gfc_typespec *ts) |
4ee9c684 | 1754 | { |
1755 | match m; | |
3bd3b616 | 1756 | int original_kind; |
4ee9c684 | 1757 | |
1758 | if (gfc_match_char ('*') != MATCH_YES) | |
1759 | return MATCH_NO; | |
1760 | ||
3bd3b616 | 1761 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
4ee9c684 | 1762 | if (m != MATCH_YES) |
1763 | return MATCH_ERROR; | |
1764 | ||
b118a35b | 1765 | original_kind = ts->kind; |
1766 | ||
4ee9c684 | 1767 | /* Massage the kind numbers for complex types. */ |
b118a35b | 1768 | if (ts->type == BT_COMPLEX) |
1769 | { | |
1770 | if (ts->kind % 2) | |
1a9745d2 | 1771 | { |
1772 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1773 | gfc_basic_typename (ts->type), original_kind); | |
1774 | return MATCH_ERROR; | |
1775 | } | |
b118a35b | 1776 | ts->kind /= 2; |
1777 | } | |
4ee9c684 | 1778 | |
f2d4ef3b | 1779 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1780 | { |
b118a35b | 1781 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
1a9745d2 | 1782 | gfc_basic_typename (ts->type), original_kind); |
4ee9c684 | 1783 | return MATCH_ERROR; |
1784 | } | |
1785 | ||
be7f01a1 | 1786 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
1787 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1788 | return MATCH_ERROR; | |
1789 | ||
4ee9c684 | 1790 | return MATCH_YES; |
1791 | } | |
1792 | ||
1793 | ||
1794 | /* Match a kind specification. Since kinds are generally optional, we | |
1795 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1796 | string is found, then we know we have an error. */ | |
1797 | ||
1798 | match | |
67a51c8e | 1799 | gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only) |
4ee9c684 | 1800 | { |
67a51c8e | 1801 | locus where, loc; |
4ee9c684 | 1802 | gfc_expr *e; |
1803 | match m, n; | |
1804 | const char *msg; | |
1805 | ||
1806 | m = MATCH_NO; | |
67a51c8e | 1807 | n = MATCH_YES; |
4ee9c684 | 1808 | e = NULL; |
1809 | ||
67a51c8e | 1810 | where = loc = gfc_current_locus; |
1811 | ||
1812 | if (kind_expr_only) | |
1813 | goto kind_expr; | |
4ee9c684 | 1814 | |
1815 | if (gfc_match_char ('(') == MATCH_NO) | |
1816 | return MATCH_NO; | |
1817 | ||
1818 | /* Also gobbles optional text. */ | |
1819 | if (gfc_match (" kind = ") == MATCH_YES) | |
1820 | m = MATCH_ERROR; | |
1821 | ||
67a51c8e | 1822 | loc = gfc_current_locus; |
1823 | ||
1824 | kind_expr: | |
4ee9c684 | 1825 | n = gfc_match_init_expr (&e); |
67a51c8e | 1826 | |
4ee9c684 | 1827 | if (n != MATCH_YES) |
67a51c8e | 1828 | { |
1829 | if (gfc_current_state () == COMP_INTERFACE | |
1830 | || gfc_current_state () == COMP_NONE | |
1831 | || gfc_current_state () == COMP_CONTAINS) | |
1832 | { | |
1833 | /* Signal using kind = -1 that the expression might include | |
1834 | use associated or imported parameters and try again after | |
1835 | the specification expressions..... */ | |
1836 | if (gfc_match_char (')') != MATCH_YES) | |
1837 | { | |
1838 | gfc_error ("Missing right parenthesis at %C"); | |
1839 | m = MATCH_ERROR; | |
1840 | goto no_match; | |
1841 | } | |
1842 | ||
1843 | gfc_free_expr (e); | |
1844 | ts->kind = -1; | |
1845 | gfc_function_kind_locus = loc; | |
1846 | gfc_undo_symbols (); | |
1847 | return MATCH_YES; | |
1848 | } | |
1849 | else | |
1850 | { | |
1851 | /* ....or else, the match is real. */ | |
1852 | if (n == MATCH_NO) | |
1853 | gfc_error ("Expected initialization expression at %C"); | |
1854 | if (n != MATCH_YES) | |
1855 | return MATCH_ERROR; | |
1856 | } | |
1857 | } | |
4ee9c684 | 1858 | |
1859 | if (e->rank != 0) | |
1860 | { | |
1861 | gfc_error ("Expected scalar initialization expression at %C"); | |
1862 | m = MATCH_ERROR; | |
1863 | goto no_match; | |
1864 | } | |
1865 | ||
1866 | msg = gfc_extract_int (e, &ts->kind); | |
1867 | if (msg != NULL) | |
1868 | { | |
1869 | gfc_error (msg); | |
1870 | m = MATCH_ERROR; | |
1871 | goto no_match; | |
1872 | } | |
1873 | ||
c5d33754 | 1874 | /* Before throwing away the expression, let's see if we had a |
1875 | C interoperable kind (and store the fact). */ | |
1876 | if (e->ts.is_c_interop == 1) | |
1877 | { | |
1878 | /* Mark this as c interoperable if being declared with one | |
1879 | of the named constants from iso_c_binding. */ | |
1880 | ts->is_c_interop = e->ts.is_iso_c; | |
1881 | ts->f90_type = e->ts.f90_type; | |
1882 | } | |
1883 | ||
4ee9c684 | 1884 | gfc_free_expr (e); |
1885 | e = NULL; | |
1886 | ||
c5d33754 | 1887 | /* Ignore errors to this point, if we've gotten here. This means |
1888 | we ignore the m=MATCH_ERROR from above. */ | |
f2d4ef3b | 1889 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1890 | { |
1891 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
1892 | gfc_basic_typename (ts->type)); | |
4ee9c684 | 1893 | m = MATCH_ERROR; |
4ee9c684 | 1894 | } |
c5d33754 | 1895 | else if (gfc_match_char (')') != MATCH_YES) |
4ee9c684 | 1896 | { |
d67fc9ae | 1897 | gfc_error ("Missing right parenthesis at %C"); |
67a51c8e | 1898 | m = MATCH_ERROR; |
4ee9c684 | 1899 | } |
c5d33754 | 1900 | else |
1901 | /* All tests passed. */ | |
1902 | m = MATCH_YES; | |
4ee9c684 | 1903 | |
c5d33754 | 1904 | if(m == MATCH_ERROR) |
1905 | gfc_current_locus = where; | |
1906 | ||
1907 | /* Return what we know from the test(s). */ | |
1908 | return m; | |
4ee9c684 | 1909 | |
1910 | no_match: | |
1911 | gfc_free_expr (e); | |
cbb9e6aa | 1912 | gfc_current_locus = where; |
4ee9c684 | 1913 | return m; |
1914 | } | |
1915 | ||
1916 | ||
33399208 | 1917 | static match |
1918 | match_char_kind (int * kind, int * is_iso_c) | |
1919 | { | |
1920 | locus where; | |
1921 | gfc_expr *e; | |
1922 | match m, n; | |
1923 | const char *msg; | |
1924 | ||
1925 | m = MATCH_NO; | |
1926 | e = NULL; | |
1927 | where = gfc_current_locus; | |
1928 | ||
1929 | n = gfc_match_init_expr (&e); | |
1930 | if (n == MATCH_NO) | |
1931 | gfc_error ("Expected initialization expression at %C"); | |
1932 | if (n != MATCH_YES) | |
1933 | return MATCH_ERROR; | |
1934 | ||
1935 | if (e->rank != 0) | |
1936 | { | |
1937 | gfc_error ("Expected scalar initialization expression at %C"); | |
1938 | m = MATCH_ERROR; | |
1939 | goto no_match; | |
1940 | } | |
1941 | ||
1942 | msg = gfc_extract_int (e, kind); | |
1943 | *is_iso_c = e->ts.is_iso_c; | |
1944 | if (msg != NULL) | |
1945 | { | |
1946 | gfc_error (msg); | |
1947 | m = MATCH_ERROR; | |
1948 | goto no_match; | |
1949 | } | |
1950 | ||
1951 | gfc_free_expr (e); | |
1952 | ||
1953 | /* Ignore errors to this point, if we've gotten here. This means | |
1954 | we ignore the m=MATCH_ERROR from above. */ | |
1955 | if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0) | |
1956 | { | |
1957 | gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind); | |
1958 | m = MATCH_ERROR; | |
1959 | } | |
1960 | else | |
1961 | /* All tests passed. */ | |
1962 | m = MATCH_YES; | |
1963 | ||
1964 | if (m == MATCH_ERROR) | |
1965 | gfc_current_locus = where; | |
1966 | ||
1967 | /* Return what we know from the test(s). */ | |
1968 | return m; | |
1969 | ||
1970 | no_match: | |
1971 | gfc_free_expr (e); | |
1972 | gfc_current_locus = where; | |
1973 | return m; | |
1974 | } | |
1975 | ||
4ee9c684 | 1976 | /* Match the various kind/length specifications in a CHARACTER |
1977 | declaration. We don't return MATCH_NO. */ | |
1978 | ||
1979 | static match | |
1a9745d2 | 1980 | match_char_spec (gfc_typespec *ts) |
4ee9c684 | 1981 | { |
33399208 | 1982 | int kind, seen_length, is_iso_c; |
4ee9c684 | 1983 | gfc_charlen *cl; |
1984 | gfc_expr *len; | |
1985 | match m; | |
33399208 | 1986 | |
4ee9c684 | 1987 | len = NULL; |
1988 | seen_length = 0; | |
33399208 | 1989 | kind = 0; |
1990 | is_iso_c = 0; | |
4ee9c684 | 1991 | |
1992 | /* Try the old-style specification first. */ | |
1993 | old_char_selector = 0; | |
1994 | ||
1995 | m = match_char_length (&len); | |
1996 | if (m != MATCH_NO) | |
1997 | { | |
1998 | if (m == MATCH_YES) | |
1999 | old_char_selector = 1; | |
2000 | seen_length = 1; | |
2001 | goto done; | |
2002 | } | |
2003 | ||
2004 | m = gfc_match_char ('('); | |
2005 | if (m != MATCH_YES) | |
2006 | { | |
c5d33754 | 2007 | m = MATCH_YES; /* Character without length is a single char. */ |
4ee9c684 | 2008 | goto done; |
2009 | } | |
2010 | ||
c5d33754 | 2011 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ |
4ee9c684 | 2012 | if (gfc_match (" kind =") == MATCH_YES) |
2013 | { | |
33399208 | 2014 | m = match_char_kind (&kind, &is_iso_c); |
c5d33754 | 2015 | |
4ee9c684 | 2016 | if (m == MATCH_ERROR) |
2017 | goto done; | |
2018 | if (m == MATCH_NO) | |
2019 | goto syntax; | |
2020 | ||
2021 | if (gfc_match (" , len =") == MATCH_NO) | |
2022 | goto rparen; | |
2023 | ||
2024 | m = char_len_param_value (&len); | |
2025 | if (m == MATCH_NO) | |
2026 | goto syntax; | |
2027 | if (m == MATCH_ERROR) | |
2028 | goto done; | |
2029 | seen_length = 1; | |
2030 | ||
2031 | goto rparen; | |
2032 | } | |
2033 | ||
f6d0e37a | 2034 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ |
4ee9c684 | 2035 | if (gfc_match (" len =") == MATCH_YES) |
2036 | { | |
2037 | m = char_len_param_value (&len); | |
2038 | if (m == MATCH_NO) | |
2039 | goto syntax; | |
2040 | if (m == MATCH_ERROR) | |
2041 | goto done; | |
2042 | seen_length = 1; | |
2043 | ||
2044 | if (gfc_match_char (')') == MATCH_YES) | |
2045 | goto done; | |
2046 | ||
2047 | if (gfc_match (" , kind =") != MATCH_YES) | |
2048 | goto syntax; | |
2049 | ||
33399208 | 2050 | if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR) |
2051 | goto done; | |
4ee9c684 | 2052 | |
2053 | goto rparen; | |
2054 | } | |
2055 | ||
f6d0e37a | 2056 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
4ee9c684 | 2057 | m = char_len_param_value (&len); |
2058 | if (m == MATCH_NO) | |
2059 | goto syntax; | |
2060 | if (m == MATCH_ERROR) | |
2061 | goto done; | |
2062 | seen_length = 1; | |
2063 | ||
2064 | m = gfc_match_char (')'); | |
2065 | if (m == MATCH_YES) | |
2066 | goto done; | |
2067 | ||
2068 | if (gfc_match_char (',') != MATCH_YES) | |
2069 | goto syntax; | |
2070 | ||
c5d33754 | 2071 | gfc_match (" kind ="); /* Gobble optional text. */ |
4ee9c684 | 2072 | |
33399208 | 2073 | m = match_char_kind (&kind, &is_iso_c); |
4ee9c684 | 2074 | if (m == MATCH_ERROR) |
2075 | goto done; | |
2076 | if (m == MATCH_NO) | |
2077 | goto syntax; | |
2078 | ||
2079 | rparen: | |
2080 | /* Require a right-paren at this point. */ | |
2081 | m = gfc_match_char (')'); | |
2082 | if (m == MATCH_YES) | |
2083 | goto done; | |
2084 | ||
2085 | syntax: | |
2086 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
2087 | m = MATCH_ERROR; | |
a3cbe8cc | 2088 | gfc_free_expr (len); |
2089 | return m; | |
4ee9c684 | 2090 | |
2091 | done: | |
4ee9c684 | 2092 | if (m != MATCH_YES) |
2093 | { | |
2094 | gfc_free_expr (len); | |
2095 | return m; | |
2096 | } | |
2097 | ||
2098 | /* Do some final massaging of the length values. */ | |
2099 | cl = gfc_get_charlen (); | |
2100 | cl->next = gfc_current_ns->cl_list; | |
2101 | gfc_current_ns->cl_list = cl; | |
2102 | ||
2103 | if (seen_length == 0) | |
2104 | cl->length = gfc_int_expr (1); | |
2105 | else | |
2fe2caa6 | 2106 | cl->length = len; |
4ee9c684 | 2107 | |
2108 | ts->cl = cl; | |
33399208 | 2109 | ts->kind = kind == 0 ? gfc_default_character_kind : kind; |
4ee9c684 | 2110 | |
c5d33754 | 2111 | /* We have to know if it was a c interoperable kind so we can |
2112 | do accurate type checking of bind(c) procs, etc. */ | |
33399208 | 2113 | if (kind != 0) |
2114 | /* Mark this as c interoperable if being declared with one | |
2115 | of the named constants from iso_c_binding. */ | |
2116 | ts->is_c_interop = is_iso_c; | |
c5d33754 | 2117 | else if (len != NULL) |
33399208 | 2118 | /* Here, we might have parsed something such as: character(c_char) |
2119 | In this case, the parsing code above grabs the c_char when | |
2120 | looking for the length (line 1690, roughly). it's the last | |
2121 | testcase for parsing the kind params of a character variable. | |
2122 | However, it's not actually the length. this seems like it | |
2123 | could be an error. | |
2124 | To see if the user used a C interop kind, test the expr | |
2125 | of the so called length, and see if it's C interoperable. */ | |
2126 | ts->is_c_interop = len->ts.is_iso_c; | |
c5d33754 | 2127 | |
4ee9c684 | 2128 | return MATCH_YES; |
2129 | } | |
2130 | ||
2131 | ||
2132 | /* Matches a type specification. If successful, sets the ts structure | |
2133 | to the matched specification. This is necessary for FUNCTION and | |
2134 | IMPLICIT statements. | |
2135 | ||
e14bee04 | 2136 | If implicit_flag is nonzero, then we don't check for the optional |
39351103 | 2137 | kind specification. Not doing so is needed for matching an IMPLICIT |
4ee9c684 | 2138 | statement correctly. */ |
2139 | ||
67a51c8e | 2140 | match |
2141 | gfc_match_type_spec (gfc_typespec *ts, int implicit_flag) | |
4ee9c684 | 2142 | { |
2143 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2144 | gfc_symbol *sym; | |
2145 | match m; | |
18f3698a | 2146 | int c; |
67a51c8e | 2147 | locus loc = gfc_current_locus; |
4ee9c684 | 2148 | |
2149 | gfc_clear_ts (ts); | |
2150 | ||
c5d33754 | 2151 | /* Clear the current binding label, in case one is given. */ |
2152 | curr_binding_label[0] = '\0'; | |
2153 | ||
25b29122 | 2154 | if (gfc_match (" byte") == MATCH_YES) |
2155 | { | |
e14bee04 | 2156 | if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C") |
25b29122 | 2157 | == FAILURE) |
2158 | return MATCH_ERROR; | |
2159 | ||
2160 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
2161 | { | |
2162 | gfc_error ("BYTE type used at %C " | |
2163 | "is not available on the target machine"); | |
2164 | return MATCH_ERROR; | |
2165 | } | |
e14bee04 | 2166 | |
25b29122 | 2167 | ts->type = BT_INTEGER; |
2168 | ts->kind = 1; | |
2169 | return MATCH_YES; | |
2170 | } | |
2171 | ||
4ee9c684 | 2172 | if (gfc_match (" integer") == MATCH_YES) |
2173 | { | |
2174 | ts->type = BT_INTEGER; | |
b8a891cb | 2175 | ts->kind = gfc_default_integer_kind; |
4ee9c684 | 2176 | goto get_kind; |
2177 | } | |
2178 | ||
2179 | if (gfc_match (" character") == MATCH_YES) | |
2180 | { | |
2181 | ts->type = BT_CHARACTER; | |
39351103 | 2182 | if (implicit_flag == 0) |
2183 | return match_char_spec (ts); | |
2184 | else | |
2185 | return MATCH_YES; | |
4ee9c684 | 2186 | } |
2187 | ||
2188 | if (gfc_match (" real") == MATCH_YES) | |
2189 | { | |
2190 | ts->type = BT_REAL; | |
b8a891cb | 2191 | ts->kind = gfc_default_real_kind; |
4ee9c684 | 2192 | goto get_kind; |
2193 | } | |
2194 | ||
2195 | if (gfc_match (" double precision") == MATCH_YES) | |
2196 | { | |
2197 | ts->type = BT_REAL; | |
b8a891cb | 2198 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2199 | return MATCH_YES; |
2200 | } | |
2201 | ||
2202 | if (gfc_match (" complex") == MATCH_YES) | |
2203 | { | |
2204 | ts->type = BT_COMPLEX; | |
b8a891cb | 2205 | ts->kind = gfc_default_complex_kind; |
4ee9c684 | 2206 | goto get_kind; |
2207 | } | |
2208 | ||
2209 | if (gfc_match (" double complex") == MATCH_YES) | |
2210 | { | |
be7f01a1 | 2211 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
2212 | "conform to the Fortran 95 standard") == FAILURE) | |
2213 | return MATCH_ERROR; | |
2214 | ||
4ee9c684 | 2215 | ts->type = BT_COMPLEX; |
b8a891cb | 2216 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2217 | return MATCH_YES; |
2218 | } | |
2219 | ||
2220 | if (gfc_match (" logical") == MATCH_YES) | |
2221 | { | |
2222 | ts->type = BT_LOGICAL; | |
b8a891cb | 2223 | ts->kind = gfc_default_logical_kind; |
4ee9c684 | 2224 | goto get_kind; |
2225 | } | |
2226 | ||
2227 | m = gfc_match (" type ( %n )", name); | |
2228 | if (m != MATCH_YES) | |
2229 | return m; | |
2230 | ||
67a51c8e | 2231 | if (gfc_current_state () == COMP_INTERFACE |
2232 | || gfc_current_state () == COMP_NONE) | |
2233 | { | |
2234 | gfc_function_type_locus = loc; | |
2235 | ts->type = BT_UNKNOWN; | |
2236 | ts->kind = -1; | |
2237 | return MATCH_YES; | |
2238 | } | |
2239 | ||
2240 | /* Search for the name but allow the components to be defined later. If | |
2241 | type = -1, this typespec has been seen in a function declaration but | |
2242 | the type could not legally be accessed at that point. */ | |
2243 | if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym)) | |
4ee9c684 | 2244 | { |
2245 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2246 | return MATCH_ERROR; | |
2247 | } | |
67a51c8e | 2248 | else if (ts->kind == -1) |
2249 | { | |
2250 | if (gfc_find_symbol (name, NULL, 0, &sym)) | |
2251 | { | |
2252 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2253 | return MATCH_ERROR; | |
2254 | } | |
2255 | ||
2256 | if (sym == NULL) | |
2257 | return MATCH_NO; | |
2258 | } | |
4ee9c684 | 2259 | |
2260 | if (sym->attr.flavor != FL_DERIVED | |
950683ed | 2261 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 2262 | return MATCH_ERROR; |
2263 | ||
2264 | ts->type = BT_DERIVED; | |
2265 | ts->kind = 0; | |
2266 | ts->derived = sym; | |
2267 | ||
2268 | return MATCH_YES; | |
2269 | ||
2270 | get_kind: | |
2271 | /* For all types except double, derived and character, look for an | |
2272 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
39351103 | 2273 | if (implicit_flag == 1) |
4ee9c684 | 2274 | return MATCH_YES; |
2275 | ||
18f3698a | 2276 | if (gfc_current_form == FORM_FREE) |
2277 | { | |
2278 | c = gfc_peek_char(); | |
2279 | if (!gfc_is_whitespace(c) && c != '*' && c != '(' | |
1a9745d2 | 2280 | && c != ':' && c != ',') |
18f3698a | 2281 | return MATCH_NO; |
2282 | } | |
2283 | ||
67a51c8e | 2284 | m = gfc_match_kind_spec (ts, false); |
4ee9c684 | 2285 | if (m == MATCH_NO && ts->type != BT_CHARACTER) |
2286 | m = gfc_match_old_kind_spec (ts); | |
2287 | ||
2288 | if (m == MATCH_NO) | |
2289 | m = MATCH_YES; /* No kind specifier found. */ | |
2290 | ||
2291 | return m; | |
2292 | } | |
2293 | ||
2294 | ||
39351103 | 2295 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
2296 | already matched in parse.c, or we would not end up here in the | |
2297 | first place. So the only thing we need to check, is if there is | |
2298 | trailing garbage. If not, the match is successful. */ | |
2299 | ||
2300 | match | |
2301 | gfc_match_implicit_none (void) | |
2302 | { | |
39351103 | 2303 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
2304 | } | |
2305 | ||
2306 | ||
2307 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
2308 | ||
2309 | static match | |
b70528c7 | 2310 | match_implicit_range (void) |
39351103 | 2311 | { |
2312 | int c, c1, c2, inner; | |
2313 | locus cur_loc; | |
2314 | ||
2315 | cur_loc = gfc_current_locus; | |
2316 | ||
2317 | gfc_gobble_whitespace (); | |
2318 | c = gfc_next_char (); | |
2319 | if (c != '(') | |
2320 | { | |
2321 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
2322 | goto bad; | |
2323 | } | |
2324 | ||
2325 | inner = 1; | |
2326 | while (inner) | |
2327 | { | |
2328 | gfc_gobble_whitespace (); | |
2329 | c1 = gfc_next_char (); | |
2330 | if (!ISALPHA (c1)) | |
2331 | goto bad; | |
2332 | ||
2333 | gfc_gobble_whitespace (); | |
2334 | c = gfc_next_char (); | |
2335 | ||
2336 | switch (c) | |
2337 | { | |
2338 | case ')': | |
f6d0e37a | 2339 | inner = 0; /* Fall through. */ |
39351103 | 2340 | |
2341 | case ',': | |
2342 | c2 = c1; | |
2343 | break; | |
2344 | ||
2345 | case '-': | |
2346 | gfc_gobble_whitespace (); | |
2347 | c2 = gfc_next_char (); | |
2348 | if (!ISALPHA (c2)) | |
2349 | goto bad; | |
2350 | ||
2351 | gfc_gobble_whitespace (); | |
2352 | c = gfc_next_char (); | |
2353 | ||
2354 | if ((c != ',') && (c != ')')) | |
2355 | goto bad; | |
2356 | if (c == ')') | |
2357 | inner = 0; | |
2358 | ||
2359 | break; | |
2360 | ||
2361 | default: | |
2362 | goto bad; | |
2363 | } | |
2364 | ||
2365 | if (c1 > c2) | |
2366 | { | |
2367 | gfc_error ("Letters must be in alphabetic order in " | |
2368 | "IMPLICIT statement at %C"); | |
2369 | goto bad; | |
2370 | } | |
2371 | ||
2372 | /* See if we can add the newly matched range to the pending | |
1a9745d2 | 2373 | implicits from this IMPLICIT statement. We do not check for |
2374 | conflicts with whatever earlier IMPLICIT statements may have | |
2375 | set. This is done when we've successfully finished matching | |
2376 | the current one. */ | |
b70528c7 | 2377 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
39351103 | 2378 | goto bad; |
2379 | } | |
2380 | ||
2381 | return MATCH_YES; | |
2382 | ||
2383 | bad: | |
2384 | gfc_syntax_error (ST_IMPLICIT); | |
2385 | ||
2386 | gfc_current_locus = cur_loc; | |
2387 | return MATCH_ERROR; | |
2388 | } | |
2389 | ||
2390 | ||
2391 | /* Match an IMPLICIT statement, storing the types for | |
2392 | gfc_set_implicit() if the statement is accepted by the parser. | |
2393 | There is a strange looking, but legal syntactic construction | |
2394 | possible. It looks like: | |
2395 | ||
2396 | IMPLICIT INTEGER (a-b) (c-d) | |
2397 | ||
2398 | This is legal if "a-b" is a constant expression that happens to | |
2399 | equal one of the legal kinds for integers. The real problem | |
2400 | happens with an implicit specification that looks like: | |
2401 | ||
2402 | IMPLICIT INTEGER (a-b) | |
2403 | ||
2404 | In this case, a typespec matcher that is "greedy" (as most of the | |
2405 | matchers are) gobbles the character range as a kindspec, leaving | |
2406 | nothing left. We therefore have to go a bit more slowly in the | |
2407 | matching process by inhibiting the kindspec checking during | |
2408 | typespec matching and checking for a kind later. */ | |
2409 | ||
2410 | match | |
2411 | gfc_match_implicit (void) | |
2412 | { | |
2413 | gfc_typespec ts; | |
2414 | locus cur_loc; | |
2415 | int c; | |
2416 | match m; | |
2417 | ||
2418 | /* We don't allow empty implicit statements. */ | |
2419 | if (gfc_match_eos () == MATCH_YES) | |
2420 | { | |
2421 | gfc_error ("Empty IMPLICIT statement at %C"); | |
2422 | return MATCH_ERROR; | |
2423 | } | |
2424 | ||
39351103 | 2425 | do |
2426 | { | |
b70528c7 | 2427 | /* First cleanup. */ |
2428 | gfc_clear_new_implicit (); | |
2429 | ||
39351103 | 2430 | /* A basic type is mandatory here. */ |
67a51c8e | 2431 | m = gfc_match_type_spec (&ts, 1); |
39351103 | 2432 | if (m == MATCH_ERROR) |
2433 | goto error; | |
2434 | if (m == MATCH_NO) | |
2435 | goto syntax; | |
2436 | ||
2437 | cur_loc = gfc_current_locus; | |
b70528c7 | 2438 | m = match_implicit_range (); |
39351103 | 2439 | |
2440 | if (m == MATCH_YES) | |
2441 | { | |
b70528c7 | 2442 | /* We may have <TYPE> (<RANGE>). */ |
39351103 | 2443 | gfc_gobble_whitespace (); |
2444 | c = gfc_next_char (); | |
2445 | if ((c == '\n') || (c == ',')) | |
b70528c7 | 2446 | { |
2447 | /* Check for CHARACTER with no length parameter. */ | |
2448 | if (ts.type == BT_CHARACTER && !ts.cl) | |
2449 | { | |
b8a891cb | 2450 | ts.kind = gfc_default_character_kind; |
b70528c7 | 2451 | ts.cl = gfc_get_charlen (); |
2452 | ts.cl->next = gfc_current_ns->cl_list; | |
2453 | gfc_current_ns->cl_list = ts.cl; | |
2454 | ts.cl->length = gfc_int_expr (1); | |
2455 | } | |
2456 | ||
2457 | /* Record the Successful match. */ | |
2458 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2459 | return MATCH_ERROR; | |
2460 | continue; | |
2461 | } | |
39351103 | 2462 | |
2463 | gfc_current_locus = cur_loc; | |
2464 | } | |
2465 | ||
b70528c7 | 2466 | /* Discard the (incorrectly) matched range. */ |
2467 | gfc_clear_new_implicit (); | |
2468 | ||
2469 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
2470 | if (ts.type == BT_CHARACTER) | |
2471 | m = match_char_spec (&ts); | |
2472 | else | |
39351103 | 2473 | { |
67a51c8e | 2474 | m = gfc_match_kind_spec (&ts, false); |
39351103 | 2475 | if (m == MATCH_NO) |
b70528c7 | 2476 | { |
2477 | m = gfc_match_old_kind_spec (&ts); | |
2478 | if (m == MATCH_ERROR) | |
2479 | goto error; | |
2480 | if (m == MATCH_NO) | |
2481 | goto syntax; | |
2482 | } | |
39351103 | 2483 | } |
b70528c7 | 2484 | if (m == MATCH_ERROR) |
2485 | goto error; | |
39351103 | 2486 | |
b70528c7 | 2487 | m = match_implicit_range (); |
39351103 | 2488 | if (m == MATCH_ERROR) |
2489 | goto error; | |
2490 | if (m == MATCH_NO) | |
2491 | goto syntax; | |
2492 | ||
2493 | gfc_gobble_whitespace (); | |
2494 | c = gfc_next_char (); | |
2495 | if ((c != '\n') && (c != ',')) | |
2496 | goto syntax; | |
2497 | ||
b70528c7 | 2498 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2499 | return MATCH_ERROR; | |
39351103 | 2500 | } |
2501 | while (c == ','); | |
2502 | ||
b70528c7 | 2503 | return MATCH_YES; |
39351103 | 2504 | |
2505 | syntax: | |
2506 | gfc_syntax_error (ST_IMPLICIT); | |
2507 | ||
2508 | error: | |
2509 | return MATCH_ERROR; | |
2510 | } | |
2511 | ||
f6d0e37a | 2512 | |
d67fc9ae | 2513 | match |
2514 | gfc_match_import (void) | |
2515 | { | |
2516 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2517 | match m; | |
2518 | gfc_symbol *sym; | |
2519 | gfc_symtree *st; | |
2520 | ||
f6d0e37a | 2521 | if (gfc_current_ns->proc_name == NULL |
2522 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
d67fc9ae | 2523 | { |
2524 | gfc_error ("IMPORT statement at %C only permitted in " | |
2525 | "an INTERFACE body"); | |
2526 | return MATCH_ERROR; | |
2527 | } | |
2528 | ||
1a9745d2 | 2529 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
d67fc9ae | 2530 | == FAILURE) |
2531 | return MATCH_ERROR; | |
2532 | ||
2533 | if (gfc_match_eos () == MATCH_YES) | |
2534 | { | |
2535 | /* All host variables should be imported. */ | |
2536 | gfc_current_ns->has_import_set = 1; | |
2537 | return MATCH_YES; | |
2538 | } | |
2539 | ||
2540 | if (gfc_match (" ::") == MATCH_YES) | |
2541 | { | |
2542 | if (gfc_match_eos () == MATCH_YES) | |
1a9745d2 | 2543 | { |
2544 | gfc_error ("Expecting list of named entities at %C"); | |
2545 | return MATCH_ERROR; | |
2546 | } | |
d67fc9ae | 2547 | } |
2548 | ||
2549 | for(;;) | |
2550 | { | |
2551 | m = gfc_match (" %n", name); | |
2552 | switch (m) | |
2553 | { | |
2554 | case MATCH_YES: | |
096d4ad9 | 2555 | if (gfc_current_ns->parent != NULL |
f6d0e37a | 2556 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
096d4ad9 | 2557 | { |
2558 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2559 | return MATCH_ERROR; | |
2560 | } | |
2561 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
f6d0e37a | 2562 | && gfc_find_symbol (name, |
2563 | gfc_current_ns->proc_name->ns->parent, | |
2564 | 1, &sym)) | |
1a9745d2 | 2565 | { |
2566 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2567 | return MATCH_ERROR; | |
2568 | } | |
2569 | ||
2570 | if (sym == NULL) | |
2571 | { | |
2572 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2573 | "at %C - does not exist.", name); | |
2574 | return MATCH_ERROR; | |
2575 | } | |
2576 | ||
e14bee04 | 2577 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) |
1a9745d2 | 2578 | { |
2579 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2580 | "at %C.", name); | |
2581 | goto next_item; | |
2582 | } | |
2583 | ||
2584 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
2585 | st->n.sym = sym; | |
2586 | sym->refs++; | |
c723595c | 2587 | sym->attr.imported = 1; |
d67fc9ae | 2588 | |
2589 | goto next_item; | |
2590 | ||
2591 | case MATCH_NO: | |
2592 | break; | |
2593 | ||
2594 | case MATCH_ERROR: | |
2595 | return MATCH_ERROR; | |
2596 | } | |
2597 | ||
2598 | next_item: | |
2599 | if (gfc_match_eos () == MATCH_YES) | |
2600 | break; | |
2601 | if (gfc_match_char (',') != MATCH_YES) | |
2602 | goto syntax; | |
2603 | } | |
2604 | ||
2605 | return MATCH_YES; | |
2606 | ||
2607 | syntax: | |
2608 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2609 | return MATCH_ERROR; | |
2610 | } | |
39351103 | 2611 | |
f6d0e37a | 2612 | |
c72e5f7e | 2613 | /* A minimal implementation of gfc_match without whitespace, escape |
2614 | characters or variable arguments. Returns true if the next | |
2615 | characters match the TARGET template exactly. */ | |
2616 | ||
2617 | static bool | |
2618 | match_string_p (const char *target) | |
2619 | { | |
2620 | const char *p; | |
2621 | ||
2622 | for (p = target; *p; p++) | |
2623 | if (gfc_next_char () != *p) | |
2624 | return false; | |
2625 | return true; | |
2626 | } | |
2627 | ||
4ee9c684 | 2628 | /* Matches an attribute specification including array specs. If |
2629 | successful, leaves the variables current_attr and current_as | |
2630 | holding the specification. Also sets the colon_seen variable for | |
2631 | later use by matchers associated with initializations. | |
2632 | ||
2633 | This subroutine is a little tricky in the sense that we don't know | |
2634 | if we really have an attr-spec until we hit the double colon. | |
2635 | Until that time, we can only return MATCH_NO. This forces us to | |
2636 | check for duplicate specification at this level. */ | |
2637 | ||
2638 | static match | |
2639 | match_attr_spec (void) | |
2640 | { | |
4ee9c684 | 2641 | /* Modifiers that can exist in a type statement. */ |
2642 | typedef enum | |
2643 | { GFC_DECL_BEGIN = 0, | |
2644 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
2645 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
3ea52af3 | 2646 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
2647 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
c72e5f7e | 2648 | DECL_IS_BIND_C, DECL_NONE, |
4ee9c684 | 2649 | GFC_DECL_END /* Sentinel */ |
2650 | } | |
2651 | decl_types; | |
2652 | ||
2653 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
2654 | #define NUM_DECL GFC_DECL_END | |
2655 | ||
4ee9c684 | 2656 | locus start, seen_at[NUM_DECL]; |
2657 | int seen[NUM_DECL]; | |
2658 | decl_types d; | |
2659 | const char *attr; | |
2660 | match m; | |
2661 | try t; | |
2662 | ||
2663 | gfc_clear_attr (¤t_attr); | |
cbb9e6aa | 2664 | start = gfc_current_locus; |
4ee9c684 | 2665 | |
2666 | current_as = NULL; | |
2667 | colon_seen = 0; | |
2668 | ||
2669 | /* See if we get all of the keywords up to the final double colon. */ | |
2670 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2671 | seen[d] = 0; | |
2672 | ||
2673 | for (;;) | |
2674 | { | |
c72e5f7e | 2675 | int ch; |
c5d33754 | 2676 | |
c72e5f7e | 2677 | d = DECL_NONE; |
2678 | gfc_gobble_whitespace (); | |
2679 | ||
2680 | ch = gfc_next_char (); | |
2681 | if (ch == ':') | |
2682 | { | |
2683 | /* This is the successful exit condition for the loop. */ | |
2684 | if (gfc_next_char () == ':') | |
2685 | break; | |
2686 | } | |
2687 | else if (ch == ',') | |
c5d33754 | 2688 | { |
c5d33754 | 2689 | gfc_gobble_whitespace (); |
c72e5f7e | 2690 | switch (gfc_peek_char ()) |
c5d33754 | 2691 | { |
c72e5f7e | 2692 | case 'a': |
2693 | if (match_string_p ("allocatable")) | |
2694 | d = DECL_ALLOCATABLE; | |
2695 | break; | |
2696 | ||
2697 | case 'b': | |
c5d33754 | 2698 | /* Try and match the bind(c). */ |
5cf92482 | 2699 | m = gfc_match_bind_c (NULL); |
2700 | if (m == MATCH_YES) | |
c5d33754 | 2701 | d = DECL_IS_BIND_C; |
5cf92482 | 2702 | else if (m == MATCH_ERROR) |
2703 | goto cleanup; | |
c72e5f7e | 2704 | break; |
2705 | ||
2706 | case 'd': | |
2707 | if (match_string_p ("dimension")) | |
2708 | d = DECL_DIMENSION; | |
2709 | break; | |
2710 | ||
2711 | case 'e': | |
2712 | if (match_string_p ("external")) | |
2713 | d = DECL_EXTERNAL; | |
2714 | break; | |
2715 | ||
2716 | case 'i': | |
2717 | if (match_string_p ("int")) | |
2718 | { | |
2719 | ch = gfc_next_char (); | |
2720 | if (ch == 'e') | |
2721 | { | |
2722 | if (match_string_p ("nt")) | |
2723 | { | |
2724 | /* Matched "intent". */ | |
2725 | /* TODO: Call match_intent_spec from here. */ | |
2726 | if (gfc_match (" ( in out )") == MATCH_YES) | |
2727 | d = DECL_INOUT; | |
2728 | else if (gfc_match (" ( in )") == MATCH_YES) | |
2729 | d = DECL_IN; | |
2730 | else if (gfc_match (" ( out )") == MATCH_YES) | |
2731 | d = DECL_OUT; | |
2732 | } | |
2733 | } | |
2734 | else if (ch == 'r') | |
2735 | { | |
2736 | if (match_string_p ("insic")) | |
2737 | { | |
2738 | /* Matched "intrinsic". */ | |
2739 | d = DECL_INTRINSIC; | |
2740 | } | |
2741 | } | |
2742 | } | |
2743 | break; | |
2744 | ||
2745 | case 'o': | |
2746 | if (match_string_p ("optional")) | |
2747 | d = DECL_OPTIONAL; | |
2748 | break; | |
2749 | ||
2750 | case 'p': | |
2751 | gfc_next_char (); | |
2752 | switch (gfc_next_char ()) | |
2753 | { | |
2754 | case 'a': | |
2755 | if (match_string_p ("rameter")) | |
2756 | { | |
2757 | /* Matched "parameter". */ | |
2758 | d = DECL_PARAMETER; | |
2759 | } | |
2760 | break; | |
2761 | ||
2762 | case 'o': | |
2763 | if (match_string_p ("inter")) | |
2764 | { | |
2765 | /* Matched "pointer". */ | |
2766 | d = DECL_POINTER; | |
2767 | } | |
2768 | break; | |
2769 | ||
2770 | case 'r': | |
2771 | ch = gfc_next_char (); | |
2772 | if (ch == 'i') | |
2773 | { | |
2774 | if (match_string_p ("vate")) | |
2775 | { | |
2776 | /* Matched "private". */ | |
2777 | d = DECL_PRIVATE; | |
2778 | } | |
2779 | } | |
2780 | else if (ch == 'o') | |
2781 | { | |
2782 | if (match_string_p ("tected")) | |
2783 | { | |
2784 | /* Matched "protected". */ | |
2785 | d = DECL_PROTECTED; | |
2786 | } | |
2787 | } | |
2788 | break; | |
2789 | ||
2790 | case 'u': | |
2791 | if (match_string_p ("blic")) | |
2792 | { | |
2793 | /* Matched "public". */ | |
2794 | d = DECL_PUBLIC; | |
2795 | } | |
2796 | break; | |
2797 | } | |
2798 | break; | |
2799 | ||
2800 | case 's': | |
2801 | if (match_string_p ("save")) | |
2802 | d = DECL_SAVE; | |
2803 | break; | |
2804 | ||
2805 | case 't': | |
2806 | if (match_string_p ("target")) | |
2807 | d = DECL_TARGET; | |
2808 | break; | |
2809 | ||
2810 | case 'v': | |
2811 | gfc_next_char (); | |
2812 | ch = gfc_next_char (); | |
2813 | if (ch == 'a') | |
2814 | { | |
2815 | if (match_string_p ("lue")) | |
2816 | { | |
2817 | /* Matched "value". */ | |
2818 | d = DECL_VALUE; | |
2819 | } | |
2820 | } | |
2821 | else if (ch == 'o') | |
2822 | { | |
2823 | if (match_string_p ("latile")) | |
2824 | { | |
2825 | /* Matched "volatile". */ | |
2826 | d = DECL_VOLATILE; | |
2827 | } | |
2828 | } | |
2829 | break; | |
c5d33754 | 2830 | } |
2831 | } | |
f3f9b222 | 2832 | |
c72e5f7e | 2833 | /* No double colon and no recognizable decl_type, so assume that |
2834 | we've been looking at something else the whole time. */ | |
2835 | if (d == DECL_NONE) | |
2836 | { | |
2837 | m = MATCH_NO; | |
2838 | goto cleanup; | |
2839 | } | |
e14bee04 | 2840 | |
4ee9c684 | 2841 | seen[d]++; |
cbb9e6aa | 2842 | seen_at[d] = gfc_current_locus; |
4ee9c684 | 2843 | |
2844 | if (d == DECL_DIMENSION) | |
2845 | { | |
2846 | m = gfc_match_array_spec (¤t_as); | |
2847 | ||
2848 | if (m == MATCH_NO) | |
2849 | { | |
2850 | gfc_error ("Missing dimension specification at %C"); | |
2851 | m = MATCH_ERROR; | |
2852 | } | |
2853 | ||
2854 | if (m == MATCH_ERROR) | |
2855 | goto cleanup; | |
2856 | } | |
2857 | } | |
2858 | ||
4ee9c684 | 2859 | /* Since we've seen a double colon, we have to be looking at an |
2860 | attr-spec. This means that we can now issue errors. */ | |
2861 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2862 | if (seen[d] > 1) | |
2863 | { | |
2864 | switch (d) | |
2865 | { | |
2866 | case DECL_ALLOCATABLE: | |
2867 | attr = "ALLOCATABLE"; | |
2868 | break; | |
2869 | case DECL_DIMENSION: | |
2870 | attr = "DIMENSION"; | |
2871 | break; | |
2872 | case DECL_EXTERNAL: | |
2873 | attr = "EXTERNAL"; | |
2874 | break; | |
2875 | case DECL_IN: | |
2876 | attr = "INTENT (IN)"; | |
2877 | break; | |
2878 | case DECL_OUT: | |
2879 | attr = "INTENT (OUT)"; | |
2880 | break; | |
2881 | case DECL_INOUT: | |
2882 | attr = "INTENT (IN OUT)"; | |
2883 | break; | |
2884 | case DECL_INTRINSIC: | |
2885 | attr = "INTRINSIC"; | |
2886 | break; | |
2887 | case DECL_OPTIONAL: | |
2888 | attr = "OPTIONAL"; | |
2889 | break; | |
2890 | case DECL_PARAMETER: | |
2891 | attr = "PARAMETER"; | |
2892 | break; | |
2893 | case DECL_POINTER: | |
2894 | attr = "POINTER"; | |
2895 | break; | |
3ea52af3 | 2896 | case DECL_PROTECTED: |
2897 | attr = "PROTECTED"; | |
2898 | break; | |
4ee9c684 | 2899 | case DECL_PRIVATE: |
2900 | attr = "PRIVATE"; | |
2901 | break; | |
2902 | case DECL_PUBLIC: | |
2903 | attr = "PUBLIC"; | |
2904 | break; | |
2905 | case DECL_SAVE: | |
2906 | attr = "SAVE"; | |
2907 | break; | |
2908 | case DECL_TARGET: | |
2909 | attr = "TARGET"; | |
2910 | break; | |
c5d33754 | 2911 | case DECL_IS_BIND_C: |
2912 | attr = "IS_BIND_C"; | |
2913 | break; | |
2914 | case DECL_VALUE: | |
2915 | attr = "VALUE"; | |
2916 | break; | |
ef814c81 | 2917 | case DECL_VOLATILE: |
2918 | attr = "VOLATILE"; | |
2919 | break; | |
4ee9c684 | 2920 | default: |
f6d0e37a | 2921 | attr = NULL; /* This shouldn't happen. */ |
4ee9c684 | 2922 | } |
2923 | ||
2924 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
2925 | m = MATCH_ERROR; | |
2926 | goto cleanup; | |
2927 | } | |
2928 | ||
2929 | /* Now that we've dealt with duplicate attributes, add the attributes | |
2930 | to the current attribute. */ | |
2931 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2932 | { | |
2933 | if (seen[d] == 0) | |
2934 | continue; | |
2935 | ||
2936 | if (gfc_current_state () == COMP_DERIVED | |
2937 | && d != DECL_DIMENSION && d != DECL_POINTER | |
c72e5f7e | 2938 | && d != DECL_PRIVATE && d != DECL_PUBLIC |
2939 | && d != DECL_NONE) | |
4ee9c684 | 2940 | { |
2294b616 | 2941 | if (d == DECL_ALLOCATABLE) |
2942 | { | |
1a9745d2 | 2943 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
2944 | "attribute at %C in a TYPE definition") | |
e14bee04 | 2945 | == FAILURE) |
2294b616 | 2946 | { |
2947 | m = MATCH_ERROR; | |
2948 | goto cleanup; | |
2949 | } | |
1a9745d2 | 2950 | } |
2951 | else | |
2294b616 | 2952 | { |
2953 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
e14bee04 | 2954 | &seen_at[d]); |
2294b616 | 2955 | m = MATCH_ERROR; |
2956 | goto cleanup; | |
2957 | } | |
4ee9c684 | 2958 | } |
2959 | ||
ea13b9b7 | 2960 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
1a9745d2 | 2961 | && gfc_current_state () != COMP_MODULE) |
ea13b9b7 | 2962 | { |
2963 | if (d == DECL_PRIVATE) | |
2964 | attr = "PRIVATE"; | |
2965 | else | |
2966 | attr = "PUBLIC"; | |
e14bee04 | 2967 | if (gfc_current_state () == COMP_DERIVED |
2968 | && gfc_state_stack->previous | |
2969 | && gfc_state_stack->previous->state == COMP_MODULE) | |
2970 | { | |
2971 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s " | |
2972 | "at %L in a TYPE definition", attr, | |
2973 | &seen_at[d]) | |
2974 | == FAILURE) | |
2975 | { | |
2976 | m = MATCH_ERROR; | |
2977 | goto cleanup; | |
2978 | } | |
2979 | } | |
2980 | else | |
2981 | { | |
2982 | gfc_error ("%s attribute at %L is not allowed outside of the " | |
2983 | "specification part of a module", attr, &seen_at[d]); | |
2984 | m = MATCH_ERROR; | |
2985 | goto cleanup; | |
2986 | } | |
ea13b9b7 | 2987 | } |
2988 | ||
4ee9c684 | 2989 | switch (d) |
2990 | { | |
2991 | case DECL_ALLOCATABLE: | |
2992 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
2993 | break; | |
2994 | ||
2995 | case DECL_DIMENSION: | |
950683ed | 2996 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 2997 | break; |
2998 | ||
2999 | case DECL_EXTERNAL: | |
3000 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
3001 | break; | |
3002 | ||
3003 | case DECL_IN: | |
3004 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
3005 | break; | |
3006 | ||
3007 | case DECL_OUT: | |
3008 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
3009 | break; | |
3010 | ||
3011 | case DECL_INOUT: | |
3012 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
3013 | break; | |
3014 | ||
3015 | case DECL_INTRINSIC: | |
3016 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
3017 | break; | |
3018 | ||
3019 | case DECL_OPTIONAL: | |
3020 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
3021 | break; | |
3022 | ||
3023 | case DECL_PARAMETER: | |
950683ed | 3024 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
4ee9c684 | 3025 | break; |
3026 | ||
3027 | case DECL_POINTER: | |
3028 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
3029 | break; | |
3030 | ||
3ea52af3 | 3031 | case DECL_PROTECTED: |
3032 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
3033 | { | |
3034 | gfc_error ("PROTECTED at %C only allowed in specification " | |
3035 | "part of a module"); | |
3036 | t = FAILURE; | |
3037 | break; | |
3038 | } | |
3039 | ||
1a9745d2 | 3040 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
3041 | "attribute at %C") | |
3ea52af3 | 3042 | == FAILURE) |
3043 | t = FAILURE; | |
3044 | else | |
3045 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
3046 | break; | |
3047 | ||
4ee9c684 | 3048 | case DECL_PRIVATE: |
950683ed | 3049 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
3050 | &seen_at[d]); | |
4ee9c684 | 3051 | break; |
3052 | ||
3053 | case DECL_PUBLIC: | |
950683ed | 3054 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
3055 | &seen_at[d]); | |
4ee9c684 | 3056 | break; |
3057 | ||
3058 | case DECL_SAVE: | |
950683ed | 3059 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 3060 | break; |
3061 | ||
3062 | case DECL_TARGET: | |
3063 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
3064 | break; | |
3065 | ||
c5d33754 | 3066 | case DECL_IS_BIND_C: |
3067 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); | |
3068 | break; | |
3069 | ||
8f6339b6 | 3070 | case DECL_VALUE: |
1a9745d2 | 3071 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
3072 | "at %C") | |
8f6339b6 | 3073 | == FAILURE) |
3074 | t = FAILURE; | |
3075 | else | |
3076 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
3077 | break; | |
3078 | ||
ef814c81 | 3079 | case DECL_VOLATILE: |
3080 | if (gfc_notify_std (GFC_STD_F2003, | |
1a9745d2 | 3081 | "Fortran 2003: VOLATILE attribute at %C") |
ef814c81 | 3082 | == FAILURE) |
3083 | t = FAILURE; | |
3084 | else | |
3085 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
3086 | break; | |
3087 | ||
4ee9c684 | 3088 | default: |
3089 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
3090 | } | |
3091 | ||
3092 | if (t == FAILURE) | |
3093 | { | |
3094 | m = MATCH_ERROR; | |
3095 | goto cleanup; | |
3096 | } | |
3097 | } | |
3098 | ||
3099 | colon_seen = 1; | |
3100 | return MATCH_YES; | |
3101 | ||
3102 | cleanup: | |
cbb9e6aa | 3103 | gfc_current_locus = start; |
4ee9c684 | 3104 | gfc_free_array_spec (current_as); |
3105 | current_as = NULL; | |
3106 | return m; | |
3107 | } | |
3108 | ||
3109 | ||
c5d33754 | 3110 | /* Set the binding label, dest_label, either with the binding label |
3111 | stored in the given gfc_typespec, ts, or if none was provided, it | |
3112 | will be the symbol name in all lower case, as required by the draft | |
3113 | (J3/04-007, section 15.4.1). If a binding label was given and | |
3114 | there is more than one argument (num_idents), it is an error. */ | |
3115 | ||
3116 | try | |
3117 | set_binding_label (char *dest_label, const char *sym_name, int num_idents) | |
3118 | { | |
825718f9 | 3119 | if (num_idents > 1 && has_name_equals) |
c5d33754 | 3120 | { |
825718f9 | 3121 | gfc_error ("Multiple identifiers provided with " |
3122 | "single NAME= specifier at %C"); | |
3123 | return FAILURE; | |
3124 | } | |
c5d33754 | 3125 | |
825718f9 | 3126 | if (curr_binding_label[0] != '\0') |
3127 | { | |
c5d33754 | 3128 | /* Binding label given; store in temp holder til have sym. */ |
3129 | strncpy (dest_label, curr_binding_label, | |
3130 | strlen (curr_binding_label) + 1); | |
3131 | } | |
3132 | else | |
3133 | { | |
3134 | /* No binding label given, and the NAME= specifier did not exist, | |
3135 | which means there was no NAME="". */ | |
3136 | if (sym_name != NULL && has_name_equals == 0) | |
3137 | strncpy (dest_label, sym_name, strlen (sym_name) + 1); | |
3138 | } | |
3139 | ||
3140 | return SUCCESS; | |
3141 | } | |
3142 | ||
3143 | ||
3144 | /* Set the status of the given common block as being BIND(C) or not, | |
3145 | depending on the given parameter, is_bind_c. */ | |
3146 | ||
3147 | void | |
3148 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) | |
3149 | { | |
3150 | com_block->is_bind_c = is_bind_c; | |
3151 | return; | |
3152 | } | |
3153 | ||
3154 | ||
3155 | /* Verify that the given gfc_typespec is for a C interoperable type. */ | |
3156 | ||
3157 | try | |
3158 | verify_c_interop (gfc_typespec *ts, const char *name, locus *where) | |
3159 | { | |
3160 | try t; | |
3161 | ||
3162 | /* Make sure the kind used is appropriate for the type. | |
3163 | The f90_type is unknown if an integer constant was | |
3164 | used (e.g., real(4), bind(c) :: myFloat). */ | |
3165 | if (ts->f90_type != BT_UNKNOWN) | |
3166 | { | |
3167 | t = gfc_validate_c_kind (ts); | |
3168 | if (t != SUCCESS) | |
3169 | { | |
3170 | /* Print an error, but continue parsing line. */ | |
3171 | gfc_error_now ("C kind parameter is for type %s but " | |
3172 | "symbol '%s' at %L is of type %s", | |
3173 | gfc_basic_typename (ts->f90_type), | |
3174 | name, where, | |
3175 | gfc_basic_typename (ts->type)); | |
3176 | } | |
3177 | } | |
3178 | ||
3179 | /* Make sure the kind is C interoperable. This does not care about the | |
3180 | possible error above. */ | |
3181 | if (ts->type == BT_DERIVED && ts->derived != NULL) | |
3182 | return (ts->derived->ts.is_c_interop ? SUCCESS : FAILURE); | |
3183 | else if (ts->is_c_interop != 1) | |
3184 | return FAILURE; | |
3185 | ||
3186 | return SUCCESS; | |
3187 | } | |
3188 | ||
3189 | ||
3190 | /* Verify that the variables of a given common block, which has been | |
3191 | defined with the attribute specifier bind(c), to be of a C | |
3192 | interoperable type. Errors will be reported here, if | |
3193 | encountered. */ | |
3194 | ||
3195 | try | |
3196 | verify_com_block_vars_c_interop (gfc_common_head *com_block) | |
3197 | { | |
3198 | gfc_symbol *curr_sym = NULL; | |
3199 | try retval = SUCCESS; | |
3200 | ||
3201 | curr_sym = com_block->head; | |
3202 | ||
3203 | /* Make sure we have at least one symbol. */ | |
3204 | if (curr_sym == NULL) | |
3205 | return retval; | |
3206 | ||
3207 | /* Here we know we have a symbol, so we'll execute this loop | |
3208 | at least once. */ | |
3209 | do | |
3210 | { | |
3211 | /* The second to last param, 1, says this is in a common block. */ | |
3212 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); | |
3213 | curr_sym = curr_sym->common_next; | |
3214 | } while (curr_sym != NULL); | |
3215 | ||
3216 | return retval; | |
3217 | } | |
3218 | ||
3219 | ||
3220 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, | |
3221 | an appropriate error message is reported. */ | |
3222 | ||
3223 | try | |
3224 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, | |
3225 | int is_in_common, gfc_common_head *com_block) | |
3226 | { | |
3227 | try retval = SUCCESS; | |
4f7bb9ec | 3228 | |
3229 | if (tmp_sym->attr.function && tmp_sym->result != NULL) | |
3230 | { | |
3231 | tmp_sym = tmp_sym->result; | |
3232 | /* Make sure it wasn't an implicitly typed result. */ | |
3233 | if (tmp_sym->attr.implicit_type) | |
3234 | { | |
3235 | gfc_warning ("Implicitly declared BIND(C) function '%s' at " | |
3236 | "%L may not be C interoperable", tmp_sym->name, | |
3237 | &tmp_sym->declared_at); | |
3238 | tmp_sym->ts.f90_type = tmp_sym->ts.type; | |
3239 | /* Mark it as C interoperable to prevent duplicate warnings. */ | |
3240 | tmp_sym->ts.is_c_interop = 1; | |
3241 | tmp_sym->attr.is_c_interop = 1; | |
3242 | } | |
3243 | } | |
c5d33754 | 3244 | |
3245 | /* Here, we know we have the bind(c) attribute, so if we have | |
3246 | enough type info, then verify that it's a C interop kind. | |
3247 | The info could be in the symbol already, or possibly still in | |
3248 | the given ts (current_ts), so look in both. */ | |
3249 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) | |
3250 | { | |
3251 | if (verify_c_interop (&(tmp_sym->ts), tmp_sym->name, | |
3252 | &(tmp_sym->declared_at)) != SUCCESS) | |
3253 | { | |
3254 | /* See if we're dealing with a sym in a common block or not. */ | |
3255 | if (is_in_common == 1) | |
3256 | { | |
3257 | gfc_warning ("Variable '%s' in common block '%s' at %L " | |
3258 | "may not be a C interoperable " | |
3259 | "kind though common block '%s' is BIND(C)", | |
3260 | tmp_sym->name, com_block->name, | |
3261 | &(tmp_sym->declared_at), com_block->name); | |
3262 | } | |
3263 | else | |
3264 | { | |
3265 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) | |
3266 | gfc_error ("Type declaration '%s' at %L is not C " | |
3267 | "interoperable but it is BIND(C)", | |
3268 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3269 | else | |
3270 | gfc_warning ("Variable '%s' at %L " | |
3271 | "may not be a C interoperable " | |
3272 | "kind but it is bind(c)", | |
3273 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3274 | } | |
3275 | } | |
3276 | ||
3277 | /* Variables declared w/in a common block can't be bind(c) | |
3278 | since there's no way for C to see these variables, so there's | |
3279 | semantically no reason for the attribute. */ | |
3280 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) | |
3281 | { | |
3282 | gfc_error ("Variable '%s' in common block '%s' at " | |
3283 | "%L cannot be declared with BIND(C) " | |
3284 | "since it is not a global", | |
3285 | tmp_sym->name, com_block->name, | |
3286 | &(tmp_sym->declared_at)); | |
3287 | retval = FAILURE; | |
3288 | } | |
3289 | ||
3290 | /* Scalar variables that are bind(c) can not have the pointer | |
3291 | or allocatable attributes. */ | |
3292 | if (tmp_sym->attr.is_bind_c == 1) | |
3293 | { | |
3294 | if (tmp_sym->attr.pointer == 1) | |
3295 | { | |
3296 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3297 | "POINTER and BIND(C) attributes", | |
3298 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3299 | retval = FAILURE; | |
3300 | } | |
3301 | ||
3302 | if (tmp_sym->attr.allocatable == 1) | |
3303 | { | |
3304 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3305 | "ALLOCATABLE and BIND(C) attributes", | |
3306 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3307 | retval = FAILURE; | |
3308 | } | |
3309 | ||
3310 | /* If it is a BIND(C) function, make sure the return value is a | |
3311 | scalar value. The previous tests in this function made sure | |
3312 | the type is interoperable. */ | |
3313 | if (tmp_sym->attr.function == 1 && tmp_sym->as != NULL) | |
3314 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3315 | "be an array", tmp_sym->name, &(tmp_sym->declared_at)); | |
3316 | ||
3317 | /* BIND(C) functions can not return a character string. */ | |
3318 | if (tmp_sym->attr.function == 1 && tmp_sym->ts.type == BT_CHARACTER) | |
3319 | if (tmp_sym->ts.cl == NULL || tmp_sym->ts.cl->length == NULL | |
3320 | || tmp_sym->ts.cl->length->expr_type != EXPR_CONSTANT | |
3321 | || mpz_cmp_si (tmp_sym->ts.cl->length->value.integer, 1) != 0) | |
3322 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3323 | "be a character string", tmp_sym->name, | |
3324 | &(tmp_sym->declared_at)); | |
3325 | } | |
3326 | } | |
3327 | ||
3328 | /* See if the symbol has been marked as private. If it has, make sure | |
3329 | there is no binding label and warn the user if there is one. */ | |
3330 | if (tmp_sym->attr.access == ACCESS_PRIVATE | |
3331 | && tmp_sym->binding_label[0] != '\0') | |
3332 | /* Use gfc_warning_now because we won't say that the symbol fails | |
3333 | just because of this. */ | |
3334 | gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " | |
3335 | "given the binding label '%s'", tmp_sym->name, | |
3336 | &(tmp_sym->declared_at), tmp_sym->binding_label); | |
3337 | ||
3338 | return retval; | |
3339 | } | |
3340 | ||
3341 | ||
3342 | /* Set the appropriate fields for a symbol that's been declared as | |
3343 | BIND(C) (the is_bind_c flag and the binding label), and verify that | |
3344 | the type is C interoperable. Errors are reported by the functions | |
3345 | used to set/test these fields. */ | |
3346 | ||
3347 | try | |
3348 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) | |
3349 | { | |
3350 | try retval = SUCCESS; | |
3351 | ||
3352 | /* TODO: Do we need to make sure the vars aren't marked private? */ | |
3353 | ||
3354 | /* Set the is_bind_c bit in symbol_attribute. */ | |
3355 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); | |
3356 | ||
3357 | if (set_binding_label (tmp_sym->binding_label, tmp_sym->name, | |
3358 | num_idents) != SUCCESS) | |
3359 | return FAILURE; | |
3360 | ||
3361 | return retval; | |
3362 | } | |
3363 | ||
3364 | ||
3365 | /* Set the fields marking the given common block as BIND(C), including | |
3366 | a binding label, and report any errors encountered. */ | |
3367 | ||
3368 | try | |
3369 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) | |
3370 | { | |
3371 | try retval = SUCCESS; | |
3372 | ||
3373 | /* destLabel, common name, typespec (which may have binding label). */ | |
3374 | if (set_binding_label (com_block->binding_label, com_block->name, num_idents) | |
3375 | != SUCCESS) | |
3376 | return FAILURE; | |
3377 | ||
3378 | /* Set the given common block (com_block) to being bind(c) (1). */ | |
3379 | set_com_block_bind_c (com_block, 1); | |
3380 | ||
3381 | return retval; | |
3382 | } | |
3383 | ||
3384 | ||
3385 | /* Retrieve the list of one or more identifiers that the given bind(c) | |
3386 | attribute applies to. */ | |
3387 | ||
3388 | try | |
3389 | get_bind_c_idents (void) | |
3390 | { | |
3391 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3392 | int num_idents = 0; | |
3393 | gfc_symbol *tmp_sym = NULL; | |
3394 | match found_id; | |
3395 | gfc_common_head *com_block = NULL; | |
3396 | ||
3397 | if (gfc_match_name (name) == MATCH_YES) | |
3398 | { | |
3399 | found_id = MATCH_YES; | |
3400 | gfc_get_ha_symbol (name, &tmp_sym); | |
3401 | } | |
3402 | else if (match_common_name (name) == MATCH_YES) | |
3403 | { | |
3404 | found_id = MATCH_YES; | |
3405 | com_block = gfc_get_common (name, 0); | |
3406 | } | |
3407 | else | |
3408 | { | |
3409 | gfc_error ("Need either entity or common block name for " | |
3410 | "attribute specification statement at %C"); | |
3411 | return FAILURE; | |
3412 | } | |
3413 | ||
3414 | /* Save the current identifier and look for more. */ | |
3415 | do | |
3416 | { | |
3417 | /* Increment the number of identifiers found for this spec stmt. */ | |
3418 | num_idents++; | |
3419 | ||
3420 | /* Make sure we have a sym or com block, and verify that it can | |
3421 | be bind(c). Set the appropriate field(s) and look for more | |
3422 | identifiers. */ | |
3423 | if (tmp_sym != NULL || com_block != NULL) | |
3424 | { | |
3425 | if (tmp_sym != NULL) | |
3426 | { | |
3427 | if (set_verify_bind_c_sym (tmp_sym, num_idents) | |
3428 | != SUCCESS) | |
3429 | return FAILURE; | |
3430 | } | |
3431 | else | |
3432 | { | |
3433 | if (set_verify_bind_c_com_block(com_block, num_idents) | |
3434 | != SUCCESS) | |
3435 | return FAILURE; | |
3436 | } | |
3437 | ||
3438 | /* Look to see if we have another identifier. */ | |
3439 | tmp_sym = NULL; | |
3440 | if (gfc_match_eos () == MATCH_YES) | |
3441 | found_id = MATCH_NO; | |
3442 | else if (gfc_match_char (',') != MATCH_YES) | |
3443 | found_id = MATCH_NO; | |
3444 | else if (gfc_match_name (name) == MATCH_YES) | |
3445 | { | |
3446 | found_id = MATCH_YES; | |
3447 | gfc_get_ha_symbol (name, &tmp_sym); | |
3448 | } | |
3449 | else if (match_common_name (name) == MATCH_YES) | |
3450 | { | |
3451 | found_id = MATCH_YES; | |
3452 | com_block = gfc_get_common (name, 0); | |
3453 | } | |
3454 | else | |
3455 | { | |
3456 | gfc_error ("Missing entity or common block name for " | |
3457 | "attribute specification statement at %C"); | |
3458 | return FAILURE; | |
3459 | } | |
3460 | } | |
3461 | else | |
3462 | { | |
3463 | gfc_internal_error ("Missing symbol"); | |
3464 | } | |
3465 | } while (found_id == MATCH_YES); | |
3466 | ||
3467 | /* if we get here we were successful */ | |
3468 | return SUCCESS; | |
3469 | } | |
3470 | ||
3471 | ||
3472 | /* Try and match a BIND(C) attribute specification statement. */ | |
3473 | ||
3474 | match | |
3475 | gfc_match_bind_c_stmt (void) | |
3476 | { | |
3477 | match found_match = MATCH_NO; | |
3478 | gfc_typespec *ts; | |
3479 | ||
3480 | ts = ¤t_ts; | |
3481 | ||
3482 | /* This may not be necessary. */ | |
3483 | gfc_clear_ts (ts); | |
3484 | /* Clear the temporary binding label holder. */ | |
3485 | curr_binding_label[0] = '\0'; | |
3486 | ||
3487 | /* Look for the bind(c). */ | |
3488 | found_match = gfc_match_bind_c (NULL); | |
3489 | ||
3490 | if (found_match == MATCH_YES) | |
3491 | { | |
3492 | /* Look for the :: now, but it is not required. */ | |
3493 | gfc_match (" :: "); | |
3494 | ||
3495 | /* Get the identifier(s) that needs to be updated. This may need to | |
3496 | change to hand the flag(s) for the attr specified so all identifiers | |
3497 | found can have all appropriate parts updated (assuming that the same | |
3498 | spec stmt can have multiple attrs, such as both bind(c) and | |
3499 | allocatable...). */ | |
3500 | if (get_bind_c_idents () != SUCCESS) | |
3501 | /* Error message should have printed already. */ | |
3502 | return MATCH_ERROR; | |
3503 | } | |
3504 | ||
3505 | return found_match; | |
3506 | } | |
3507 | ||
3508 | ||
4ee9c684 | 3509 | /* Match a data declaration statement. */ |
3510 | ||
3511 | match | |
3512 | gfc_match_data_decl (void) | |
3513 | { | |
3514 | gfc_symbol *sym; | |
3515 | match m; | |
3923b69f | 3516 | int elem; |
4ee9c684 | 3517 | |
c5d33754 | 3518 | num_idents_on_line = 0; |
3519 | ||
67a51c8e | 3520 | m = gfc_match_type_spec (¤t_ts, 0); |
4ee9c684 | 3521 | if (m != MATCH_YES) |
3522 | return m; | |
3523 | ||
3524 | if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) | |
3525 | { | |
3526 | sym = gfc_use_derived (current_ts.derived); | |
3527 | ||
3528 | if (sym == NULL) | |
3529 | { | |
3530 | m = MATCH_ERROR; | |
3531 | goto cleanup; | |
3532 | } | |
3533 | ||
3534 | current_ts.derived = sym; | |
3535 | } | |
3536 | ||
3537 | m = match_attr_spec (); | |
3538 | if (m == MATCH_ERROR) | |
3539 | { | |
3540 | m = MATCH_NO; | |
3541 | goto cleanup; | |
3542 | } | |
3543 | ||
e6b82afc | 3544 | if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL |
3545 | && !current_ts.derived->attr.zero_comp) | |
4ee9c684 | 3546 | { |
3547 | ||
3548 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
3549 | goto ok; | |
3550 | ||
40cf8078 | 3551 | gfc_find_symbol (current_ts.derived->name, |
1a9745d2 | 3552 | current_ts.derived->ns->parent, 1, &sym); |
4ee9c684 | 3553 | |
40cf8078 | 3554 | /* Any symbol that we find had better be a type definition |
1a9745d2 | 3555 | which has its components defined. */ |
40cf8078 | 3556 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
e6b82afc | 3557 | && (current_ts.derived->components != NULL |
3558 | || current_ts.derived->attr.zero_comp)) | |
4ee9c684 | 3559 | goto ok; |
3560 | ||
40cf8078 | 3561 | /* Now we have an error, which we signal, and then fix up |
3562 | because the knock-on is plain and simple confusing. */ | |
3563 | gfc_error_now ("Derived type at %C has not been previously defined " | |
1a9745d2 | 3564 | "and so cannot appear in a derived type definition"); |
40cf8078 | 3565 | current_attr.pointer = 1; |
3566 | goto ok; | |
4ee9c684 | 3567 | } |
3568 | ||
3569 | ok: | |
3570 | /* If we have an old-style character declaration, and no new-style | |
3571 | attribute specifications, then there a comma is optional between | |
3572 | the type specification and the variable list. */ | |
3573 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
3574 | gfc_match_char (','); | |
3575 | ||
3923b69f | 3576 | /* Give the types/attributes to symbols that follow. Give the element |
3577 | a number so that repeat character length expressions can be copied. */ | |
3578 | elem = 1; | |
4ee9c684 | 3579 | for (;;) |
3580 | { | |
c5d33754 | 3581 | num_idents_on_line++; |
3923b69f | 3582 | m = variable_decl (elem++); |
4ee9c684 | 3583 | if (m == MATCH_ERROR) |
3584 | goto cleanup; | |
3585 | if (m == MATCH_NO) | |
3586 | break; | |
3587 | ||
3588 | if (gfc_match_eos () == MATCH_YES) | |
3589 | goto cleanup; | |
3590 | if (gfc_match_char (',') != MATCH_YES) | |
3591 | break; | |
3592 | } | |
3593 | ||
8f0bdb23 | 3594 | if (gfc_error_flag_test () == 0) |
3595 | gfc_error ("Syntax error in data declaration at %C"); | |
4ee9c684 | 3596 | m = MATCH_ERROR; |
3597 | ||
af29c1f0 | 3598 | gfc_free_data_all (gfc_current_ns); |
3599 | ||
4ee9c684 | 3600 | cleanup: |
3601 | gfc_free_array_spec (current_as); | |
3602 | current_as = NULL; | |
3603 | return m; | |
3604 | } | |
3605 | ||
3606 | ||
3607 | /* Match a prefix associated with a function or subroutine | |
3608 | declaration. If the typespec pointer is nonnull, then a typespec | |
3609 | can be matched. Note that if nothing matches, MATCH_YES is | |
3610 | returned (the null string was matched). */ | |
3611 | ||
3612 | static match | |
1a9745d2 | 3613 | match_prefix (gfc_typespec *ts) |
4ee9c684 | 3614 | { |
3615 | int seen_type; | |
3616 | ||
3617 | gfc_clear_attr (¤t_attr); | |
3618 | seen_type = 0; | |
3619 | ||
3620 | loop: | |
3621 | if (!seen_type && ts != NULL | |
67a51c8e | 3622 | && gfc_match_type_spec (ts, 0) == MATCH_YES |
4ee9c684 | 3623 | && gfc_match_space () == MATCH_YES) |
3624 | { | |
3625 | ||
3626 | seen_type = 1; | |
3627 | goto loop; | |
3628 | } | |
3629 | ||
3630 | if (gfc_match ("elemental% ") == MATCH_YES) | |
3631 | { | |
3632 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
3633 | return MATCH_ERROR; | |
3634 | ||
3635 | goto loop; | |
3636 | } | |
3637 | ||
3638 | if (gfc_match ("pure% ") == MATCH_YES) | |
3639 | { | |
3640 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
3641 | return MATCH_ERROR; | |
3642 | ||
3643 | goto loop; | |
3644 | } | |
3645 | ||
3646 | if (gfc_match ("recursive% ") == MATCH_YES) | |
3647 | { | |
3648 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
3649 | return MATCH_ERROR; | |
3650 | ||
3651 | goto loop; | |
3652 | } | |
3653 | ||
3654 | /* At this point, the next item is not a prefix. */ | |
3655 | return MATCH_YES; | |
3656 | } | |
3657 | ||
3658 | ||
3659 | /* Copy attributes matched by match_prefix() to attributes on a symbol. */ | |
3660 | ||
3661 | static try | |
1a9745d2 | 3662 | copy_prefix (symbol_attribute *dest, locus *where) |
4ee9c684 | 3663 | { |
4ee9c684 | 3664 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
3665 | return FAILURE; | |
3666 | ||
3667 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
3668 | return FAILURE; | |
3669 | ||
3670 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
3671 | return FAILURE; | |
3672 | ||
3673 | return SUCCESS; | |
3674 | } | |
3675 | ||
3676 | ||
3677 | /* Match a formal argument list. */ | |
3678 | ||
3679 | match | |
1a9745d2 | 3680 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
4ee9c684 | 3681 | { |
3682 | gfc_formal_arglist *head, *tail, *p, *q; | |
3683 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3684 | gfc_symbol *sym; | |
3685 | match m; | |
3686 | ||
3687 | head = tail = NULL; | |
3688 | ||
3689 | if (gfc_match_char ('(') != MATCH_YES) | |
3690 | { | |
3691 | if (null_flag) | |
3692 | goto ok; | |
3693 | return MATCH_NO; | |
3694 | } | |
3695 | ||
3696 | if (gfc_match_char (')') == MATCH_YES) | |
3697 | goto ok; | |
3698 | ||
3699 | for (;;) | |
3700 | { | |
3701 | if (gfc_match_char ('*') == MATCH_YES) | |
3702 | sym = NULL; | |
3703 | else | |
3704 | { | |
3705 | m = gfc_match_name (name); | |
3706 | if (m != MATCH_YES) | |
3707 | goto cleanup; | |
3708 | ||
3709 | if (gfc_get_symbol (name, NULL, &sym)) | |
3710 | goto cleanup; | |
3711 | } | |
3712 | ||
3713 | p = gfc_get_formal_arglist (); | |
3714 | ||
3715 | if (head == NULL) | |
3716 | head = tail = p; | |
3717 | else | |
3718 | { | |
3719 | tail->next = p; | |
3720 | tail = p; | |
3721 | } | |
3722 | ||
3723 | tail->sym = sym; | |
3724 | ||
3725 | /* We don't add the VARIABLE flavor because the name could be a | |
1a9745d2 | 3726 | dummy procedure. We don't apply these attributes to formal |
3727 | arguments of statement functions. */ | |
4ee9c684 | 3728 | if (sym != NULL && !st_flag |
950683ed | 3729 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
4ee9c684 | 3730 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
3731 | { | |
3732 | m = MATCH_ERROR; | |
3733 | goto cleanup; | |
3734 | } | |
3735 | ||
3736 | /* The name of a program unit can be in a different namespace, | |
1a9745d2 | 3737 | so check for it explicitly. After the statement is accepted, |
3738 | the name is checked for especially in gfc_get_symbol(). */ | |
4ee9c684 | 3739 | if (gfc_new_block != NULL && sym != NULL |
3740 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
3741 | { | |
3742 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
3743 | sym->name); | |
3744 | m = MATCH_ERROR; | |
3745 | goto cleanup; | |
3746 | } | |
3747 | ||
3748 | if (gfc_match_char (')') == MATCH_YES) | |
3749 | goto ok; | |
3750 | ||
3751 | m = gfc_match_char (','); | |
3752 | if (m != MATCH_YES) | |
3753 | { | |
3754 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
3755 | goto cleanup; | |
3756 | } | |
3757 | } | |
3758 | ||
3759 | ok: | |
3760 | /* Check for duplicate symbols in the formal argument list. */ | |
3761 | if (head != NULL) | |
3762 | { | |
3763 | for (p = head; p->next; p = p->next) | |
3764 | { | |
3765 | if (p->sym == NULL) | |
3766 | continue; | |
3767 | ||
3768 | for (q = p->next; q; q = q->next) | |
3769 | if (p->sym == q->sym) | |
3770 | { | |
1a9745d2 | 3771 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
3772 | "at %C", p->sym->name); | |
4ee9c684 | 3773 | |
3774 | m = MATCH_ERROR; | |
3775 | goto cleanup; | |
3776 | } | |
3777 | } | |
3778 | } | |
3779 | ||
f6d0e37a | 3780 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) |
3781 | == FAILURE) | |
4ee9c684 | 3782 | { |
3783 | m = MATCH_ERROR; | |
3784 | goto cleanup; | |
3785 | } | |
3786 | ||
3787 | return MATCH_YES; | |
3788 | ||
3789 | cleanup: | |
3790 | gfc_free_formal_arglist (head); | |
3791 | return m; | |
3792 | } | |
3793 | ||
3794 | ||
3795 | /* Match a RESULT specification following a function declaration or | |
3796 | ENTRY statement. Also matches the end-of-statement. */ | |
3797 | ||
3798 | static match | |
f6d0e37a | 3799 | match_result (gfc_symbol *function, gfc_symbol **result) |
4ee9c684 | 3800 | { |
3801 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3802 | gfc_symbol *r; | |
3803 | match m; | |
3804 | ||
3805 | if (gfc_match (" result (") != MATCH_YES) | |
3806 | return MATCH_NO; | |
3807 | ||
3808 | m = gfc_match_name (name); | |
3809 | if (m != MATCH_YES) | |
3810 | return m; | |
3811 | ||
c5d33754 | 3812 | /* Get the right paren, and that's it because there could be the |
3813 | bind(c) attribute after the result clause. */ | |
3814 | if (gfc_match_char(')') != MATCH_YES) | |
4ee9c684 | 3815 | { |
c5d33754 | 3816 | /* TODO: should report the missing right paren here. */ |
4ee9c684 | 3817 | return MATCH_ERROR; |
3818 | } | |
3819 | ||
3820 | if (strcmp (function->name, name) == 0) | |
3821 | { | |
1a9745d2 | 3822 | gfc_error ("RESULT variable at %C must be different than function name"); |
4ee9c684 | 3823 | return MATCH_ERROR; |
3824 | } | |
3825 | ||
3826 | if (gfc_get_symbol (name, NULL, &r)) | |
3827 | return MATCH_ERROR; | |
3828 | ||
950683ed | 3829 | if (gfc_add_flavor (&r->attr, FL_VARIABLE, r->name, NULL) == FAILURE |
3830 | || gfc_add_result (&r->attr, r->name, NULL) == FAILURE) | |
4ee9c684 | 3831 | return MATCH_ERROR; |
3832 | ||
3833 | *result = r; | |
3834 | ||
3835 | return MATCH_YES; | |
3836 | } | |
3837 | ||
3838 | ||
c5d33754 | 3839 | /* Match a function suffix, which could be a combination of a result |
3840 | clause and BIND(C), either one, or neither. The draft does not | |
3841 | require them to come in a specific order. */ | |
3842 | ||
3843 | match | |
3844 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) | |
3845 | { | |
3846 | match is_bind_c; /* Found bind(c). */ | |
3847 | match is_result; /* Found result clause. */ | |
3848 | match found_match; /* Status of whether we've found a good match. */ | |
3849 | int peek_char; /* Character we're going to peek at. */ | |
3850 | ||
3851 | /* Initialize to having found nothing. */ | |
3852 | found_match = MATCH_NO; | |
3853 | is_bind_c = MATCH_NO; | |
3854 | is_result = MATCH_NO; | |
3855 | ||
3856 | /* Get the next char to narrow between result and bind(c). */ | |
3857 | gfc_gobble_whitespace (); | |
3858 | peek_char = gfc_peek_char (); | |
3859 | ||
3860 | switch (peek_char) | |
3861 | { | |
3862 | case 'r': | |
3863 | /* Look for result clause. */ | |
3864 | is_result = match_result (sym, result); | |
3865 | if (is_result == MATCH_YES) | |
3866 | { | |
3867 | /* Now see if there is a bind(c) after it. */ | |
3868 | is_bind_c = gfc_match_bind_c (sym); | |
3869 | /* We've found the result clause and possibly bind(c). */ | |
3870 | found_match = MATCH_YES; | |
3871 | } | |
3872 | else | |
3873 | /* This should only be MATCH_ERROR. */ | |
3874 | found_match = is_result; | |
3875 | break; | |
3876 | case 'b': | |
3877 | /* Look for bind(c) first. */ | |
3878 | is_bind_c = gfc_match_bind_c (sym); | |
3879 | if (is_bind_c == MATCH_YES) | |
3880 | { | |
3881 | /* Now see if a result clause followed it. */ | |
3882 | is_result = match_result (sym, result); | |
3883 | found_match = MATCH_YES; | |
3884 | } | |
3885 | else | |
3886 | { | |
3887 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ | |
3888 | found_match = MATCH_ERROR; | |
3889 | } | |
3890 | break; | |
3891 | default: | |
3892 | gfc_error ("Unexpected junk after function declaration at %C"); | |
3893 | found_match = MATCH_ERROR; | |
3894 | break; | |
3895 | } | |
3896 | ||
c5d33754 | 3897 | if (is_bind_c == MATCH_YES) |
3898 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) | |
3899 | == FAILURE) | |
3900 | return MATCH_ERROR; | |
3901 | ||
3902 | return found_match; | |
3903 | } | |
3904 | ||
3905 | ||
af1a34ee | 3906 | /* Match a PROCEDURE declaration (R1211). */ |
3907 | ||
3908 | static match | |
3909 | match_procedure_decl (void) | |
3910 | { | |
3911 | match m; | |
3912 | locus old_loc, entry_loc; | |
3913 | gfc_symbol *sym, *proc_if = NULL; | |
3914 | int num; | |
3915 | ||
3916 | old_loc = entry_loc = gfc_current_locus; | |
3917 | ||
3918 | gfc_clear_ts (¤t_ts); | |
3919 | ||
3920 | if (gfc_match (" (") != MATCH_YES) | |
3921 | { | |
3922 | gfc_current_locus = entry_loc; | |
3923 | return MATCH_NO; | |
3924 | } | |
3925 | ||
3926 | /* Get the type spec. for the procedure interface. */ | |
3927 | old_loc = gfc_current_locus; | |
67a51c8e | 3928 | m = gfc_match_type_spec (¤t_ts, 0); |
af1a34ee | 3929 | if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_char () == ')')) |
3930 | goto got_ts; | |
3931 | ||
3932 | if (m == MATCH_ERROR) | |
3933 | return m; | |
3934 | ||
3935 | gfc_current_locus = old_loc; | |
3936 | ||
3937 | /* Get the name of the procedure or abstract interface | |
3938 | to inherit the interface from. */ | |
3939 | m = gfc_match_symbol (&proc_if, 1); | |
3940 | ||
3941 | if (m == MATCH_NO) | |
3942 | goto syntax; | |
3943 | else if (m == MATCH_ERROR) | |
3944 | return m; | |
3945 | ||
3946 | /* Various interface checks. */ | |
3947 | if (proc_if) | |
3948 | { | |
74113644 | 3949 | /* Resolve interface if possible. That way, attr.procedure is only set |
3950 | if it is declared by a later procedure-declaration-stmt, which is | |
3951 | invalid per C1212. */ | |
3952 | while (proc_if->interface) | |
3953 | proc_if = proc_if->interface; | |
3954 | ||
af1a34ee | 3955 | if (proc_if->generic) |
3956 | { | |
3957 | gfc_error ("Interface '%s' at %C may not be generic", proc_if->name); | |
3958 | return MATCH_ERROR; | |
3959 | } | |
3960 | if (proc_if->attr.proc == PROC_ST_FUNCTION) | |
3961 | { | |
3962 | gfc_error ("Interface '%s' at %C may not be a statement function", | |
3963 | proc_if->name); | |
3964 | return MATCH_ERROR; | |
3965 | } | |
3966 | /* Handle intrinsic procedures. */ | |
3967 | if (gfc_intrinsic_name (proc_if->name, 0) | |
3968 | || gfc_intrinsic_name (proc_if->name, 1)) | |
3969 | proc_if->attr.intrinsic = 1; | |
3970 | if (proc_if->attr.intrinsic | |
3971 | && !gfc_intrinsic_actual_ok (proc_if->name, 0)) | |
3972 | { | |
3973 | gfc_error ("Intrinsic procedure '%s' not allowed " | |
3974 | "in PROCEDURE statement at %C", proc_if->name); | |
3975 | return MATCH_ERROR; | |
3976 | } | |
af1a34ee | 3977 | } |
3978 | ||
3979 | got_ts: | |
af1a34ee | 3980 | if (gfc_match (" )") != MATCH_YES) |
3981 | { | |
3982 | gfc_current_locus = entry_loc; | |
3983 | return MATCH_NO; | |
3984 | } | |
3985 | ||
3986 | /* Parse attributes. */ | |
3987 | m = match_attr_spec(); | |
3988 | if (m == MATCH_ERROR) | |
3989 | return MATCH_ERROR; | |
3990 | ||
3991 | /* Get procedure symbols. */ | |
3992 | for(num=1;;num++) | |
3993 | { | |
af1a34ee | 3994 | m = gfc_match_symbol (&sym, 0); |
3995 | if (m == MATCH_NO) | |
3996 | goto syntax; | |
3997 | else if (m == MATCH_ERROR) | |
3998 | return m; | |
3999 | ||
4000 | /* Add current_attr to the symbol attributes. */ | |
4001 | if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
4002 | return MATCH_ERROR; | |
4003 | ||
4004 | if (sym->attr.is_bind_c) | |
4005 | { | |
4006 | /* Check for C1218. */ | |
4007 | if (!proc_if || !proc_if->attr.is_bind_c) | |
4008 | { | |
4009 | gfc_error ("BIND(C) attribute at %C requires " | |
4010 | "an interface with BIND(C)"); | |
4011 | return MATCH_ERROR; | |
4012 | } | |
4013 | /* Check for C1217. */ | |
4014 | if (has_name_equals && sym->attr.pointer) | |
4015 | { | |
4016 | gfc_error ("BIND(C) procedure with NAME may not have " | |
4017 | "POINTER attribute at %C"); | |
4018 | return MATCH_ERROR; | |
4019 | } | |
4020 | if (has_name_equals && sym->attr.dummy) | |
4021 | { | |
4022 | gfc_error ("Dummy procedure at %C may not have " | |
4023 | "BIND(C) attribute with NAME"); | |
4024 | return MATCH_ERROR; | |
4025 | } | |
4026 | /* Set binding label for BIND(C). */ | |
4027 | if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS) | |
4028 | return MATCH_ERROR; | |
4029 | } | |
4030 | ||
4031 | if (!sym->attr.pointer && gfc_add_external (&sym->attr, NULL) == FAILURE) | |
4032 | return MATCH_ERROR; | |
4033 | if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE) | |
4034 | return MATCH_ERROR; | |
4035 | ||
4036 | /* Set interface. */ | |
4037 | if (proc_if != NULL) | |
f7d7a083 | 4038 | { |
4039 | sym->interface = proc_if; | |
4040 | sym->attr.untyped = 1; | |
4041 | } | |
af1a34ee | 4042 | else if (current_ts.type != BT_UNKNOWN) |
4043 | { | |
4044 | sym->interface = gfc_new_symbol ("", gfc_current_ns); | |
4045 | sym->interface->ts = current_ts; | |
4046 | sym->interface->attr.function = 1; | |
4047 | sym->ts = sym->interface->ts; | |
4048 | sym->attr.function = sym->interface->attr.function; | |
4049 | } | |
4050 | ||
4051 | if (gfc_match_eos () == MATCH_YES) | |
4052 | return MATCH_YES; | |
4053 | if (gfc_match_char (',') != MATCH_YES) | |
4054 | goto syntax; | |
4055 | } | |
4056 | ||
4057 | syntax: | |
4058 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4059 | return MATCH_ERROR; | |
4060 | } | |
4061 | ||
4062 | ||
4063 | /* Match a PROCEDURE declaration inside an interface (R1206). */ | |
4064 | ||
4065 | static match | |
4066 | match_procedure_in_interface (void) | |
4067 | { | |
4068 | match m; | |
4069 | gfc_symbol *sym; | |
4070 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4071 | ||
4072 | if (current_interface.type == INTERFACE_NAMELESS | |
4073 | || current_interface.type == INTERFACE_ABSTRACT) | |
4074 | { | |
4075 | gfc_error ("PROCEDURE at %C must be in a generic interface"); | |
4076 | return MATCH_ERROR; | |
4077 | } | |
4078 | ||
4079 | for(;;) | |
4080 | { | |
4081 | m = gfc_match_name (name); | |
4082 | if (m == MATCH_NO) | |
4083 | goto syntax; | |
4084 | else if (m == MATCH_ERROR) | |
4085 | return m; | |
4086 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
4087 | return MATCH_ERROR; | |
4088 | ||
4089 | if (gfc_add_interface (sym) == FAILURE) | |
4090 | return MATCH_ERROR; | |
4091 | ||
af1a34ee | 4092 | if (gfc_match_eos () == MATCH_YES) |
4093 | break; | |
4094 | if (gfc_match_char (',') != MATCH_YES) | |
4095 | goto syntax; | |
4096 | } | |
4097 | ||
4098 | return MATCH_YES; | |
4099 | ||
4100 | syntax: | |
4101 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4102 | return MATCH_ERROR; | |
4103 | } | |
4104 | ||
4105 | ||
4106 | /* General matcher for PROCEDURE declarations. */ | |
4107 | ||
4108 | match | |
4109 | gfc_match_procedure (void) | |
4110 | { | |
4111 | match m; | |
4112 | ||
4113 | switch (gfc_current_state ()) | |
4114 | { | |
4115 | case COMP_NONE: | |
4116 | case COMP_PROGRAM: | |
4117 | case COMP_MODULE: | |
4118 | case COMP_SUBROUTINE: | |
4119 | case COMP_FUNCTION: | |
4120 | m = match_procedure_decl (); | |
4121 | break; | |
4122 | case COMP_INTERFACE: | |
4123 | m = match_procedure_in_interface (); | |
4124 | break; | |
4125 | case COMP_DERIVED: | |
4126 | gfc_error ("Fortran 2003: Procedure components at %C are " | |
4127 | "not yet implemented in gfortran"); | |
4128 | return MATCH_ERROR; | |
4129 | default: | |
4130 | return MATCH_NO; | |
4131 | } | |
4132 | ||
4133 | if (m != MATCH_YES) | |
4134 | return m; | |
4135 | ||
4136 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C") | |
4137 | == FAILURE) | |
4138 | return MATCH_ERROR; | |
4139 | ||
4140 | return m; | |
4141 | } | |
4142 | ||
4143 | ||
4ee9c684 | 4144 | /* Match a function declaration. */ |
4145 | ||
4146 | match | |
4147 | gfc_match_function_decl (void) | |
4148 | { | |
4149 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4150 | gfc_symbol *sym, *result; | |
4151 | locus old_loc; | |
4152 | match m; | |
c5d33754 | 4153 | match suffix_match; |
4154 | match found_match; /* Status returned by match func. */ | |
4ee9c684 | 4155 | |
4156 | if (gfc_current_state () != COMP_NONE | |
4157 | && gfc_current_state () != COMP_INTERFACE | |
4158 | && gfc_current_state () != COMP_CONTAINS) | |
4159 | return MATCH_NO; | |
4160 | ||
4161 | gfc_clear_ts (¤t_ts); | |
4162 | ||
cbb9e6aa | 4163 | old_loc = gfc_current_locus; |
4ee9c684 | 4164 | |
4165 | m = match_prefix (¤t_ts); | |
4166 | if (m != MATCH_YES) | |
4167 | { | |
cbb9e6aa | 4168 | gfc_current_locus = old_loc; |
4ee9c684 | 4169 | return m; |
4170 | } | |
4171 | ||
4172 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
4173 | { | |
cbb9e6aa | 4174 | gfc_current_locus = old_loc; |
4ee9c684 | 4175 | return MATCH_NO; |
4176 | } | |
d77f260f | 4177 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 4178 | return MATCH_ERROR; |
4179 | gfc_new_block = sym; | |
4180 | ||
4181 | m = gfc_match_formal_arglist (sym, 0, 0); | |
4182 | if (m == MATCH_NO) | |
9b435b6d | 4183 | { |
4184 | gfc_error ("Expected formal argument list in function " | |
1a9745d2 | 4185 | "definition at %C"); |
9b435b6d | 4186 | m = MATCH_ERROR; |
4187 | goto cleanup; | |
4188 | } | |
4ee9c684 | 4189 | else if (m == MATCH_ERROR) |
4190 | goto cleanup; | |
4191 | ||
4192 | result = NULL; | |
4193 | ||
c5d33754 | 4194 | /* According to the draft, the bind(c) and result clause can |
4195 | come in either order after the formal_arg_list (i.e., either | |
4196 | can be first, both can exist together or by themselves or neither | |
4197 | one). Therefore, the match_result can't match the end of the | |
4198 | string, and check for the bind(c) or result clause in either order. */ | |
4199 | found_match = gfc_match_eos (); | |
4200 | ||
4201 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
4202 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4203 | not allowed for procedures. */ | |
4204 | if (sym->attr.is_bind_c == 1) | |
4205 | { | |
4206 | sym->attr.is_bind_c = 0; | |
4207 | if (sym->old_symbol != NULL) | |
4208 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4209 | "variables or common blocks", | |
4210 | &(sym->old_symbol->declared_at)); | |
4211 | else | |
4212 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4213 | "variables or common blocks", &gfc_current_locus); | |
4ee9c684 | 4214 | } |
4215 | ||
c5d33754 | 4216 | if (found_match != MATCH_YES) |
4ee9c684 | 4217 | { |
c5d33754 | 4218 | /* If we haven't found the end-of-statement, look for a suffix. */ |
4219 | suffix_match = gfc_match_suffix (sym, &result); | |
4220 | if (suffix_match == MATCH_YES) | |
4221 | /* Need to get the eos now. */ | |
4222 | found_match = gfc_match_eos (); | |
4223 | else | |
4224 | found_match = suffix_match; | |
4ee9c684 | 4225 | } |
4226 | ||
c5d33754 | 4227 | if(found_match != MATCH_YES) |
4228 | m = MATCH_ERROR; | |
4ee9c684 | 4229 | else |
4230 | { | |
c5d33754 | 4231 | /* Make changes to the symbol. */ |
4232 | m = MATCH_ERROR; | |
4233 | ||
4234 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) | |
4235 | goto cleanup; | |
4236 | ||
4237 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
4238 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4239 | goto cleanup; | |
4ee9c684 | 4240 | |
c5d33754 | 4241 | if (current_ts.type != BT_UNKNOWN && sym->ts.type != BT_UNKNOWN |
4242 | && !sym->attr.implicit_type) | |
4243 | { | |
4244 | gfc_error ("Function '%s' at %C already has a type of %s", name, | |
4245 | gfc_basic_typename (sym->ts.type)); | |
4246 | goto cleanup; | |
4247 | } | |
4248 | ||
4249 | if (result == NULL) | |
4250 | { | |
4251 | sym->ts = current_ts; | |
4252 | sym->result = sym; | |
4253 | } | |
4254 | else | |
4255 | { | |
4256 | result->ts = current_ts; | |
4257 | sym->result = result; | |
4258 | } | |
4259 | ||
4260 | return MATCH_YES; | |
4261 | } | |
4ee9c684 | 4262 | |
4263 | cleanup: | |
cbb9e6aa | 4264 | gfc_current_locus = old_loc; |
4ee9c684 | 4265 | return m; |
4266 | } | |
4267 | ||
1a9745d2 | 4268 | |
4269 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
4270 | pass the name of the entry, rather than the gfc_current_block name, and | |
4271 | to return false upon finding an existing global entry. */ | |
858f9894 | 4272 | |
4273 | static bool | |
1a9745d2 | 4274 | add_global_entry (const char *name, int sub) |
858f9894 | 4275 | { |
4276 | gfc_gsymbol *s; | |
4277 | ||
4278 | s = gfc_get_gsymbol(name); | |
4279 | ||
4280 | if (s->defined | |
1a9745d2 | 4281 | || (s->type != GSYM_UNKNOWN |
4282 | && s->type != (sub ? GSYM_SUBROUTINE : GSYM_FUNCTION))) | |
cbbac028 | 4283 | gfc_global_used(s, NULL); |
858f9894 | 4284 | else |
4285 | { | |
4286 | s->type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; | |
4287 | s->where = gfc_current_locus; | |
4288 | s->defined = 1; | |
4289 | return true; | |
4290 | } | |
4291 | return false; | |
4292 | } | |
4ee9c684 | 4293 | |
1a9745d2 | 4294 | |
4ee9c684 | 4295 | /* Match an ENTRY statement. */ |
4296 | ||
4297 | match | |
4298 | gfc_match_entry (void) | |
4299 | { | |
1b716045 | 4300 | gfc_symbol *proc; |
4301 | gfc_symbol *result; | |
4302 | gfc_symbol *entry; | |
4ee9c684 | 4303 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
4304 | gfc_compile_state state; | |
4305 | match m; | |
1b716045 | 4306 | gfc_entry_list *el; |
7b5e1acc | 4307 | locus old_loc; |
d77f260f | 4308 | bool module_procedure; |
4ee9c684 | 4309 | |
4310 | m = gfc_match_name (name); | |
4311 | if (m != MATCH_YES) | |
4312 | return m; | |
4313 | ||
1b716045 | 4314 | state = gfc_current_state (); |
ea37f786 | 4315 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
1b716045 | 4316 | { |
ea37f786 | 4317 | switch (state) |
4318 | { | |
4319 | case COMP_PROGRAM: | |
4320 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
4321 | break; | |
4322 | case COMP_MODULE: | |
4323 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
4324 | break; | |
4325 | case COMP_BLOCK_DATA: | |
1a9745d2 | 4326 | gfc_error ("ENTRY statement at %C cannot appear within " |
4327 | "a BLOCK DATA"); | |
ea37f786 | 4328 | break; |
4329 | case COMP_INTERFACE: | |
1a9745d2 | 4330 | gfc_error ("ENTRY statement at %C cannot appear within " |
4331 | "an INTERFACE"); | |
ea37f786 | 4332 | break; |
4333 | case COMP_DERIVED: | |
1a9745d2 | 4334 | gfc_error ("ENTRY statement at %C cannot appear within " |
4335 | "a DERIVED TYPE block"); | |
ea37f786 | 4336 | break; |
4337 | case COMP_IF: | |
1a9745d2 | 4338 | gfc_error ("ENTRY statement at %C cannot appear within " |
4339 | "an IF-THEN block"); | |
ea37f786 | 4340 | break; |
4341 | case COMP_DO: | |
1a9745d2 | 4342 | gfc_error ("ENTRY statement at %C cannot appear within " |
4343 | "a DO block"); | |
ea37f786 | 4344 | break; |
4345 | case COMP_SELECT: | |
1a9745d2 | 4346 | gfc_error ("ENTRY statement at %C cannot appear within " |
4347 | "a SELECT block"); | |
ea37f786 | 4348 | break; |
4349 | case COMP_FORALL: | |
1a9745d2 | 4350 | gfc_error ("ENTRY statement at %C cannot appear within " |
4351 | "a FORALL block"); | |
ea37f786 | 4352 | break; |
4353 | case COMP_WHERE: | |
1a9745d2 | 4354 | gfc_error ("ENTRY statement at %C cannot appear within " |
4355 | "a WHERE block"); | |
ea37f786 | 4356 | break; |
4357 | case COMP_CONTAINS: | |
1a9745d2 | 4358 | gfc_error ("ENTRY statement at %C cannot appear within " |
4359 | "a contained subprogram"); | |
ea37f786 | 4360 | break; |
4361 | default: | |
4362 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
4363 | } | |
1b716045 | 4364 | return MATCH_ERROR; |
4365 | } | |
4366 | ||
d77f260f | 4367 | module_procedure = gfc_current_ns->parent != NULL |
1a9745d2 | 4368 | && gfc_current_ns->parent->proc_name |
4369 | && gfc_current_ns->parent->proc_name->attr.flavor | |
4370 | == FL_MODULE; | |
d77f260f | 4371 | |
1b716045 | 4372 | if (gfc_current_ns->parent != NULL |
4373 | && gfc_current_ns->parent->proc_name | |
d77f260f | 4374 | && !module_procedure) |
1b716045 | 4375 | { |
4376 | gfc_error("ENTRY statement at %C cannot appear in a " | |
4377 | "contained procedure"); | |
4378 | return MATCH_ERROR; | |
4379 | } | |
4380 | ||
d77f260f | 4381 | /* Module function entries need special care in get_proc_name |
4382 | because previous references within the function will have | |
4383 | created symbols attached to the current namespace. */ | |
4384 | if (get_proc_name (name, &entry, | |
4385 | gfc_current_ns->parent != NULL | |
4386 | && module_procedure | |
4387 | && gfc_current_ns->proc_name->attr.function)) | |
4ee9c684 | 4388 | return MATCH_ERROR; |
4389 | ||
1b716045 | 4390 | proc = gfc_current_block (); |
4391 | ||
4392 | if (state == COMP_SUBROUTINE) | |
4ee9c684 | 4393 | { |
950683ed | 4394 | /* An entry in a subroutine. */ |
8cafc742 | 4395 | if (!gfc_current_ns->parent && !add_global_entry (name, 1)) |
858f9894 | 4396 | return MATCH_ERROR; |
4397 | ||
4ee9c684 | 4398 | m = gfc_match_formal_arglist (entry, 0, 1); |
4399 | if (m != MATCH_YES) | |
4400 | return MATCH_ERROR; | |
4401 | ||
950683ed | 4402 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4403 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 4404 | return MATCH_ERROR; |
1b716045 | 4405 | } |
4406 | else | |
4407 | { | |
7b5e1acc | 4408 | /* An entry in a function. |
1a9745d2 | 4409 | We need to take special care because writing |
4410 | ENTRY f() | |
4411 | as | |
4412 | ENTRY f | |
4413 | is allowed, whereas | |
4414 | ENTRY f() RESULT (r) | |
4415 | can't be written as | |
4416 | ENTRY f RESULT (r). */ | |
8cafc742 | 4417 | if (!gfc_current_ns->parent && !add_global_entry (name, 0)) |
858f9894 | 4418 | return MATCH_ERROR; |
4419 | ||
7b5e1acc | 4420 | old_loc = gfc_current_locus; |
4421 | if (gfc_match_eos () == MATCH_YES) | |
4422 | { | |
4423 | gfc_current_locus = old_loc; | |
4424 | /* Match the empty argument list, and add the interface to | |
4425 | the symbol. */ | |
4426 | m = gfc_match_formal_arglist (entry, 0, 1); | |
4427 | } | |
4428 | else | |
4429 | m = gfc_match_formal_arglist (entry, 0, 0); | |
4430 | ||
4ee9c684 | 4431 | if (m != MATCH_YES) |
4432 | return MATCH_ERROR; | |
4433 | ||
4ee9c684 | 4434 | result = NULL; |
4435 | ||
4436 | if (gfc_match_eos () == MATCH_YES) | |
4437 | { | |
950683ed | 4438 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4439 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 4440 | return MATCH_ERROR; |
4441 | ||
c6871095 | 4442 | entry->result = entry; |
4ee9c684 | 4443 | } |
4444 | else | |
4445 | { | |
1b716045 | 4446 | m = match_result (proc, &result); |
4ee9c684 | 4447 | if (m == MATCH_NO) |
4448 | gfc_syntax_error (ST_ENTRY); | |
4449 | if (m != MATCH_YES) | |
4450 | return MATCH_ERROR; | |
4451 | ||
950683ed | 4452 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE |
4453 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
1a9745d2 | 4454 | || gfc_add_function (&entry->attr, result->name, NULL) |
4455 | == FAILURE) | |
4ee9c684 | 4456 | return MATCH_ERROR; |
c6871095 | 4457 | |
4458 | entry->result = result; | |
4ee9c684 | 4459 | } |
4ee9c684 | 4460 | } |
4461 | ||
4462 | if (gfc_match_eos () != MATCH_YES) | |
4463 | { | |
4464 | gfc_syntax_error (ST_ENTRY); | |
4465 | return MATCH_ERROR; | |
4466 | } | |
4467 | ||
1b716045 | 4468 | entry->attr.recursive = proc->attr.recursive; |
4469 | entry->attr.elemental = proc->attr.elemental; | |
4470 | entry->attr.pure = proc->attr.pure; | |
4ee9c684 | 4471 | |
1b716045 | 4472 | el = gfc_get_entry_list (); |
4473 | el->sym = entry; | |
4474 | el->next = gfc_current_ns->entries; | |
4475 | gfc_current_ns->entries = el; | |
4476 | if (el->next) | |
4477 | el->id = el->next->id + 1; | |
4478 | else | |
4479 | el->id = 1; | |
4ee9c684 | 4480 | |
1b716045 | 4481 | new_st.op = EXEC_ENTRY; |
4482 | new_st.ext.entry = el; | |
4483 | ||
4484 | return MATCH_YES; | |
4ee9c684 | 4485 | } |
4486 | ||
4487 | ||
4488 | /* Match a subroutine statement, including optional prefixes. */ | |
4489 | ||
4490 | match | |
4491 | gfc_match_subroutine (void) | |
4492 | { | |
4493 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4494 | gfc_symbol *sym; | |
4495 | match m; | |
c5d33754 | 4496 | match is_bind_c; |
4497 | char peek_char; | |
4ee9c684 | 4498 | |
4499 | if (gfc_current_state () != COMP_NONE | |
4500 | && gfc_current_state () != COMP_INTERFACE | |
4501 | && gfc_current_state () != COMP_CONTAINS) | |
4502 | return MATCH_NO; | |
4503 | ||
4504 | m = match_prefix (NULL); | |
4505 | if (m != MATCH_YES) | |
4506 | return m; | |
4507 | ||
4508 | m = gfc_match ("subroutine% %n", name); | |
4509 | if (m != MATCH_YES) | |
4510 | return m; | |
4511 | ||
d77f260f | 4512 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 4513 | return MATCH_ERROR; |
4514 | gfc_new_block = sym; | |
4515 | ||
c5d33754 | 4516 | /* Check what next non-whitespace character is so we can tell if there |
4517 | where the required parens if we have a BIND(C). */ | |
4518 | gfc_gobble_whitespace (); | |
4519 | peek_char = gfc_peek_char (); | |
4520 | ||
950683ed | 4521 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
4ee9c684 | 4522 | return MATCH_ERROR; |
4523 | ||
4524 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
4525 | return MATCH_ERROR; | |
4526 | ||
c5d33754 | 4527 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
4528 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4529 | not allowed for procedures. */ | |
4530 | if (sym->attr.is_bind_c == 1) | |
4531 | { | |
4532 | sym->attr.is_bind_c = 0; | |
4533 | if (sym->old_symbol != NULL) | |
4534 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4535 | "variables or common blocks", | |
4536 | &(sym->old_symbol->declared_at)); | |
4537 | else | |
4538 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4539 | "variables or common blocks", &gfc_current_locus); | |
4540 | } | |
4541 | ||
4542 | /* Here, we are just checking if it has the bind(c) attribute, and if | |
4543 | so, then we need to make sure it's all correct. If it doesn't, | |
4544 | we still need to continue matching the rest of the subroutine line. */ | |
4545 | is_bind_c = gfc_match_bind_c (sym); | |
4546 | if (is_bind_c == MATCH_ERROR) | |
4547 | { | |
4548 | /* There was an attempt at the bind(c), but it was wrong. An | |
4549 | error message should have been printed w/in the gfc_match_bind_c | |
4550 | so here we'll just return the MATCH_ERROR. */ | |
4551 | return MATCH_ERROR; | |
4552 | } | |
4553 | ||
4554 | if (is_bind_c == MATCH_YES) | |
4555 | { | |
4556 | if (peek_char != '(') | |
4557 | { | |
4558 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
4559 | return MATCH_ERROR; | |
4560 | } | |
4561 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) | |
4562 | == FAILURE) | |
4563 | return MATCH_ERROR; | |
4564 | } | |
4565 | ||
4ee9c684 | 4566 | if (gfc_match_eos () != MATCH_YES) |
4567 | { | |
4568 | gfc_syntax_error (ST_SUBROUTINE); | |
4569 | return MATCH_ERROR; | |
4570 | } | |
4571 | ||
4572 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4573 | return MATCH_ERROR; | |
4574 | ||
4575 | return MATCH_YES; | |
4576 | } | |
4577 | ||
4578 | ||
c5d33754 | 4579 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
4580 | given, and set the binding label in either the given symbol (if not | |
a0527218 | 4581 | NULL), or in the current_ts. The symbol may be NULL because we may |
c5d33754 | 4582 | encounter the BIND(C) before the declaration itself. Return |
4583 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, | |
4584 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, | |
4585 | or MATCH_YES if the specifier was correct and the binding label and | |
4586 | bind(c) fields were set correctly for the given symbol or the | |
4587 | current_ts. */ | |
4588 | ||
4589 | match | |
4590 | gfc_match_bind_c (gfc_symbol *sym) | |
4591 | { | |
4592 | /* binding label, if exists */ | |
4593 | char binding_label[GFC_MAX_SYMBOL_LEN + 1]; | |
4594 | match double_quote; | |
4595 | match single_quote; | |
c5d33754 | 4596 | |
4597 | /* Initialize the flag that specifies whether we encountered a NAME= | |
4598 | specifier or not. */ | |
4599 | has_name_equals = 0; | |
4600 | ||
4601 | /* Init the first char to nil so we can catch if we don't have | |
4602 | the label (name attr) or the symbol name yet. */ | |
4603 | binding_label[0] = '\0'; | |
4604 | ||
4605 | /* This much we have to be able to match, in this order, if | |
4606 | there is a bind(c) label. */ | |
4607 | if (gfc_match (" bind ( c ") != MATCH_YES) | |
4608 | return MATCH_NO; | |
4609 | ||
4610 | /* Now see if there is a binding label, or if we've reached the | |
4611 | end of the bind(c) attribute without one. */ | |
4612 | if (gfc_match_char (',') == MATCH_YES) | |
4613 | { | |
4614 | if (gfc_match (" name = ") != MATCH_YES) | |
4615 | { | |
4616 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
4617 | "at %C"); | |
4618 | /* should give an error message here */ | |
4619 | return MATCH_ERROR; | |
4620 | } | |
4621 | ||
4622 | has_name_equals = 1; | |
4623 | ||
4624 | /* Get the opening quote. */ | |
4625 | double_quote = MATCH_YES; | |
4626 | single_quote = MATCH_YES; | |
4627 | double_quote = gfc_match_char ('"'); | |
4628 | if (double_quote != MATCH_YES) | |
4629 | single_quote = gfc_match_char ('\''); | |
4630 | if (double_quote != MATCH_YES && single_quote != MATCH_YES) | |
4631 | { | |
4632 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
4633 | "at %C"); | |
4634 | return MATCH_ERROR; | |
4635 | } | |
4636 | ||
4637 | /* Grab the binding label, using functions that will not lower | |
4638 | case the names automatically. */ | |
4639 | if (gfc_match_name_C (binding_label) != MATCH_YES) | |
4640 | return MATCH_ERROR; | |
4641 | ||
4642 | /* Get the closing quotation. */ | |
4643 | if (double_quote == MATCH_YES) | |
4644 | { | |
4645 | if (gfc_match_char ('"') != MATCH_YES) | |
4646 | { | |
4647 | gfc_error ("Missing closing quote '\"' for binding label at %C"); | |
4648 | /* User started string with '"' so looked to match it. */ | |
4649 | return MATCH_ERROR; | |
4650 | } | |
4651 | } | |
4652 | else | |
4653 | { | |
4654 | if (gfc_match_char ('\'') != MATCH_YES) | |
4655 | { | |
4656 | gfc_error ("Missing closing quote '\'' for binding label at %C"); | |
4657 | /* User started string with "'" char. */ | |
4658 | return MATCH_ERROR; | |
4659 | } | |
4660 | } | |
4661 | } | |
4662 | ||
4663 | /* Get the required right paren. */ | |
4664 | if (gfc_match_char (')') != MATCH_YES) | |
4665 | { | |
4666 | gfc_error ("Missing closing paren for binding label at %C"); | |
4667 | return MATCH_ERROR; | |
4668 | } | |
4669 | ||
4670 | /* Save the binding label to the symbol. If sym is null, we're | |
4671 | probably matching the typespec attributes of a declaration and | |
4672 | haven't gotten the name yet, and therefore, no symbol yet. */ | |
4673 | if (binding_label[0] != '\0') | |
4674 | { | |
4675 | if (sym != NULL) | |
4676 | { | |
4677 | strncpy (sym->binding_label, binding_label, | |
4678 | strlen (binding_label)+1); | |
4679 | } | |
4680 | else | |
4681 | strncpy (curr_binding_label, binding_label, | |
4682 | strlen (binding_label) + 1); | |
4683 | } | |
4684 | else | |
4685 | { | |
4686 | /* No binding label, but if symbol isn't null, we | |
4687 | can set the label for it here. */ | |
4688 | /* TODO: If the name= was given and no binding label (name=""), we simply | |
4689 | will let fortran mangle the symbol name as it usually would. | |
4690 | However, this could still let C call it if the user looked up the | |
4691 | symbol in the object file. Should the name set during mangling in | |
4692 | trans-decl.c be marked with characters that are invalid for C to | |
4693 | prevent this? */ | |
4694 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) | |
4695 | strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1); | |
4696 | } | |
94fa7146 | 4697 | |
5cf92482 | 4698 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
4699 | && current_interface.type == INTERFACE_ABSTRACT) | |
94fa7146 | 4700 | { |
4701 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); | |
4702 | return MATCH_ERROR; | |
4703 | } | |
4704 | ||
c5d33754 | 4705 | return MATCH_YES; |
4706 | } | |
4707 | ||
4708 | ||
231e961a | 4709 | /* Return nonzero if we're currently compiling a contained procedure. */ |
c0985832 | 4710 | |
4711 | static int | |
4712 | contained_procedure (void) | |
4713 | { | |
4714 | gfc_state_data *s; | |
4715 | ||
4716 | for (s=gfc_state_stack; s; s=s->previous) | |
4717 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) | |
1a9745d2 | 4718 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) |
c0985832 | 4719 | return 1; |
4720 | ||
4721 | return 0; | |
4722 | } | |
4723 | ||
e14bee04 | 4724 | /* Set the kind of each enumerator. The kind is selected such that it is |
3b6a4b41 | 4725 | interoperable with the corresponding C enumeration type, making |
4726 | sure that -fshort-enums is honored. */ | |
4727 | ||
4728 | static void | |
4729 | set_enum_kind(void) | |
4730 | { | |
4731 | enumerator_history *current_history = NULL; | |
4732 | int kind; | |
4733 | int i; | |
4734 | ||
4735 | if (max_enum == NULL || enum_history == NULL) | |
4736 | return; | |
4737 | ||
4738 | if (!gfc_option.fshort_enums) | |
e14bee04 | 4739 | return; |
4740 | ||
3b6a4b41 | 4741 | i = 0; |
4742 | do | |
4743 | { | |
4744 | kind = gfc_integer_kinds[i++].kind; | |
4745 | } | |
e14bee04 | 4746 | while (kind < gfc_c_int_kind |
3b6a4b41 | 4747 | && gfc_check_integer_range (max_enum->initializer->value.integer, |
4748 | kind) != ARITH_OK); | |
4749 | ||
4750 | current_history = enum_history; | |
4751 | while (current_history != NULL) | |
4752 | { | |
4753 | current_history->sym->ts.kind = kind; | |
4754 | current_history = current_history->next; | |
4755 | } | |
4756 | } | |
4757 | ||
1a9745d2 | 4758 | |
4ee9c684 | 4759 | /* Match any of the various end-block statements. Returns the type of |
4760 | END to the caller. The END INTERFACE, END IF, END DO and END | |
4761 | SELECT statements cannot be replaced by a single END statement. */ | |
4762 | ||
4763 | match | |
1a9745d2 | 4764 | gfc_match_end (gfc_statement *st) |
4ee9c684 | 4765 | { |
4766 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4767 | gfc_compile_state state; | |
4768 | locus old_loc; | |
4769 | const char *block_name; | |
4770 | const char *target; | |
c0985832 | 4771 | int eos_ok; |
4ee9c684 | 4772 | match m; |
4773 | ||
cbb9e6aa | 4774 | old_loc = gfc_current_locus; |
4ee9c684 | 4775 | if (gfc_match ("end") != MATCH_YES) |
4776 | return MATCH_NO; | |
4777 | ||
4778 | state = gfc_current_state (); | |
1a9745d2 | 4779 | block_name = gfc_current_block () == NULL |
4780 | ? NULL : gfc_current_block ()->name; | |
4ee9c684 | 4781 | |
4782 | if (state == COMP_CONTAINS) | |
4783 | { | |
4784 | state = gfc_state_stack->previous->state; | |
1a9745d2 | 4785 | block_name = gfc_state_stack->previous->sym == NULL |
4786 | ? NULL : gfc_state_stack->previous->sym->name; | |
4ee9c684 | 4787 | } |
4788 | ||
4789 | switch (state) | |
4790 | { | |
4791 | case COMP_NONE: | |
4792 | case COMP_PROGRAM: | |
4793 | *st = ST_END_PROGRAM; | |
4794 | target = " program"; | |
c0985832 | 4795 | eos_ok = 1; |
4ee9c684 | 4796 | break; |
4797 | ||
4798 | case COMP_SUBROUTINE: | |
4799 | *st = ST_END_SUBROUTINE; | |
4800 | target = " subroutine"; | |
c0985832 | 4801 | eos_ok = !contained_procedure (); |
4ee9c684 | 4802 | break; |
4803 | ||
4804 | case COMP_FUNCTION: | |
4805 | *st = ST_END_FUNCTION; | |
4806 | target = " function"; | |
c0985832 | 4807 | eos_ok = !contained_procedure (); |
4ee9c684 | 4808 | break; |
4809 | ||
4810 | case COMP_BLOCK_DATA: | |
4811 | *st = ST_END_BLOCK_DATA; | |
4812 | target = " block data"; | |
c0985832 | 4813 | eos_ok = 1; |
4ee9c684 | 4814 | break; |
4815 | ||
4816 | case COMP_MODULE: | |
4817 | *st = ST_END_MODULE; | |
4818 | target = " module"; | |
c0985832 | 4819 | eos_ok = 1; |
4ee9c684 | 4820 | break; |
4821 | ||
4822 | case COMP_INTERFACE: | |
4823 | *st = ST_END_INTERFACE; | |
4824 | target = " interface"; | |
c0985832 | 4825 | eos_ok = 0; |
4ee9c684 | 4826 | break; |
4827 | ||
4828 | case COMP_DERIVED: | |
4829 | *st = ST_END_TYPE; | |
4830 | target = " type"; | |
c0985832 | 4831 | eos_ok = 0; |
4ee9c684 | 4832 | break; |
4833 | ||
4834 | case COMP_IF: | |
4835 | *st = ST_ENDIF; | |
4836 | target = " if"; | |
c0985832 | 4837 | eos_ok = 0; |
4ee9c684 | 4838 | break; |
4839 | ||
4840 | case COMP_DO: | |
4841 | *st = ST_ENDDO; | |
4842 | target = " do"; | |
c0985832 | 4843 | eos_ok = 0; |
4ee9c684 | 4844 | break; |
4845 | ||
4846 | case COMP_SELECT: | |
4847 | *st = ST_END_SELECT; | |
4848 | target = " select"; | |
c0985832 | 4849 | eos_ok = 0; |
4ee9c684 | 4850 | break; |
4851 | ||
4852 | case COMP_FORALL: | |
4853 | *st = ST_END_FORALL; | |
4854 | target = " forall"; | |
c0985832 | 4855 | eos_ok = 0; |
4ee9c684 | 4856 | break; |
4857 | ||
4858 | case COMP_WHERE: | |
4859 | *st = ST_END_WHERE; | |
4860 | target = " where"; | |
c0985832 | 4861 | eos_ok = 0; |
4ee9c684 | 4862 | break; |
4863 | ||
3b6a4b41 | 4864 | case COMP_ENUM: |
4865 | *st = ST_END_ENUM; | |
4866 | target = " enum"; | |
4867 | eos_ok = 0; | |
4868 | last_initializer = NULL; | |
4869 | set_enum_kind (); | |
4870 | gfc_free_enum_history (); | |
4871 | break; | |
4872 | ||
4ee9c684 | 4873 | default: |
4874 | gfc_error ("Unexpected END statement at %C"); | |
4875 | goto cleanup; | |
4876 | } | |
4877 | ||
4878 | if (gfc_match_eos () == MATCH_YES) | |
4879 | { | |
c0985832 | 4880 | if (!eos_ok) |
4ee9c684 | 4881 | { |
f6d0e37a | 4882 | /* We would have required END [something]. */ |
d197c9ee | 4883 | gfc_error ("%s statement expected at %L", |
4884 | gfc_ascii_statement (*st), &old_loc); | |
4ee9c684 | 4885 | goto cleanup; |
4886 | } | |
4887 | ||
4888 | return MATCH_YES; | |
4889 | } | |
4890 | ||
4891 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
4892 | if (gfc_match (target) != MATCH_YES) | |
4893 | { | |
4894 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
4895 | goto cleanup; | |
4896 | } | |
4897 | ||
4898 | /* If we're at the end, make sure a block name wasn't required. */ | |
4899 | if (gfc_match_eos () == MATCH_YES) | |
4900 | { | |
4901 | ||
0d0ce415 | 4902 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT |
4903 | && *st != ST_END_FORALL && *st != ST_END_WHERE) | |
4ee9c684 | 4904 | return MATCH_YES; |
4905 | ||
4906 | if (gfc_current_block () == NULL) | |
4907 | return MATCH_YES; | |
4908 | ||
4909 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
4910 | block_name, gfc_ascii_statement (*st)); | |
4911 | ||
4912 | return MATCH_ERROR; | |
4913 | } | |
4914 | ||
4915 | /* END INTERFACE has a special handler for its several possible endings. */ | |
4916 | if (*st == ST_END_INTERFACE) | |
4917 | return gfc_match_end_interface (); | |
4918 | ||
f6d0e37a | 4919 | /* We haven't hit the end of statement, so what is left must be an |
4920 | end-name. */ | |
4ee9c684 | 4921 | m = gfc_match_space (); |
4922 | if (m == MATCH_YES) | |
4923 | m = gfc_match_name (name); | |
4924 | ||
4925 | if (m == MATCH_NO) | |
4926 | gfc_error ("Expected terminating name at %C"); | |
4927 | if (m != MATCH_YES) | |
4928 | goto cleanup; | |
4929 | ||
4930 | if (block_name == NULL) | |
4931 | goto syntax; | |
4932 | ||
4933 | if (strcmp (name, block_name) != 0) | |
4934 | { | |
4935 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
4936 | gfc_ascii_statement (*st)); | |
4937 | goto cleanup; | |
4938 | } | |
4939 | ||
4940 | if (gfc_match_eos () == MATCH_YES) | |
4941 | return MATCH_YES; | |
4942 | ||
4943 | syntax: | |
4944 | gfc_syntax_error (*st); | |
4945 | ||
4946 | cleanup: | |
cbb9e6aa | 4947 | gfc_current_locus = old_loc; |
4ee9c684 | 4948 | return MATCH_ERROR; |
4949 | } | |
4950 | ||
4951 | ||
4952 | ||
4953 | /***************** Attribute declaration statements ****************/ | |
4954 | ||
4955 | /* Set the attribute of a single variable. */ | |
4956 | ||
4957 | static match | |
4958 | attr_decl1 (void) | |
4959 | { | |
4960 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4961 | gfc_array_spec *as; | |
4962 | gfc_symbol *sym; | |
4963 | locus var_locus; | |
4964 | match m; | |
4965 | ||
4966 | as = NULL; | |
4967 | ||
4968 | m = gfc_match_name (name); | |
4969 | if (m != MATCH_YES) | |
4970 | goto cleanup; | |
4971 | ||
4972 | if (find_special (name, &sym)) | |
4973 | return MATCH_ERROR; | |
4974 | ||
cbb9e6aa | 4975 | var_locus = gfc_current_locus; |
4ee9c684 | 4976 | |
4977 | /* Deal with possible array specification for certain attributes. */ | |
4978 | if (current_attr.dimension | |
4979 | || current_attr.allocatable | |
4980 | || current_attr.pointer | |
4981 | || current_attr.target) | |
4982 | { | |
4983 | m = gfc_match_array_spec (&as); | |
4984 | if (m == MATCH_ERROR) | |
4985 | goto cleanup; | |
4986 | ||
4987 | if (current_attr.dimension && m == MATCH_NO) | |
4988 | { | |
1a9745d2 | 4989 | gfc_error ("Missing array specification at %L in DIMENSION " |
4990 | "statement", &var_locus); | |
4ee9c684 | 4991 | m = MATCH_ERROR; |
4992 | goto cleanup; | |
4993 | } | |
4994 | ||
4995 | if ((current_attr.allocatable || current_attr.pointer) | |
4996 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
4997 | { | |
1a9745d2 | 4998 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
4ee9c684 | 4999 | m = MATCH_ERROR; |
5000 | goto cleanup; | |
5001 | } | |
5002 | } | |
5003 | ||
1a9745d2 | 5004 | /* Update symbol table. DIMENSION attribute is set |
5005 | in gfc_set_array_spec(). */ | |
4ee9c684 | 5006 | if (current_attr.dimension == 0 |
5007 | && gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
5008 | { | |
5009 | m = MATCH_ERROR; | |
5010 | goto cleanup; | |
5011 | } | |
5012 | ||
5013 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
5014 | { | |
5015 | m = MATCH_ERROR; | |
5016 | goto cleanup; | |
5017 | } | |
e14bee04 | 5018 | |
b549d2a5 | 5019 | if (sym->attr.cray_pointee && sym->as != NULL) |
5020 | { | |
5021 | /* Fix the array spec. */ | |
5022 | m = gfc_mod_pointee_as (sym->as); | |
5023 | if (m == MATCH_ERROR) | |
5024 | goto cleanup; | |
5025 | } | |
4ee9c684 | 5026 | |
25dd7350 | 5027 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
14efb9b7 | 5028 | { |
5029 | m = MATCH_ERROR; | |
5030 | goto cleanup; | |
5031 | } | |
5032 | ||
4ee9c684 | 5033 | if ((current_attr.external || current_attr.intrinsic) |
5034 | && sym->attr.flavor != FL_PROCEDURE | |
950683ed | 5035 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
4ee9c684 | 5036 | { |
5037 | m = MATCH_ERROR; | |
5038 | goto cleanup; | |
5039 | } | |
5040 | ||
5041 | return MATCH_YES; | |
5042 | ||
5043 | cleanup: | |
5044 | gfc_free_array_spec (as); | |
5045 | return m; | |
5046 | } | |
5047 | ||
5048 | ||
5049 | /* Generic attribute declaration subroutine. Used for attributes that | |
5050 | just have a list of names. */ | |
5051 | ||
5052 | static match | |
5053 | attr_decl (void) | |
5054 | { | |
5055 | match m; | |
5056 | ||
5057 | /* Gobble the optional double colon, by simply ignoring the result | |
5058 | of gfc_match(). */ | |
5059 | gfc_match (" ::"); | |
5060 | ||
5061 | for (;;) | |
5062 | { | |
5063 | m = attr_decl1 (); | |
5064 | if (m != MATCH_YES) | |
5065 | break; | |
5066 | ||
5067 | if (gfc_match_eos () == MATCH_YES) | |
5068 | { | |
5069 | m = MATCH_YES; | |
5070 | break; | |
5071 | } | |
5072 | ||
5073 | if (gfc_match_char (',') != MATCH_YES) | |
5074 | { | |
5075 | gfc_error ("Unexpected character in variable list at %C"); | |
5076 | m = MATCH_ERROR; | |
5077 | break; | |
5078 | } | |
5079 | } | |
5080 | ||
5081 | return m; | |
5082 | } | |
5083 | ||
5084 | ||
b549d2a5 | 5085 | /* This routine matches Cray Pointer declarations of the form: |
5086 | pointer ( <pointer>, <pointee> ) | |
5087 | or | |
e14bee04 | 5088 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
5089 | The pointer, if already declared, should be an integer. Otherwise, we | |
b549d2a5 | 5090 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
5091 | be either a scalar, or an array declaration. No space is allocated for | |
e14bee04 | 5092 | the pointee. For the statement |
b549d2a5 | 5093 | pointer (ipt, ar(10)) |
5094 | any subsequent uses of ar will be translated (in C-notation) as | |
e14bee04 | 5095 | ar(i) => ((<type> *) ipt)(i) |
b7bf3f81 | 5096 | After gimplification, pointee variable will disappear in the code. */ |
b549d2a5 | 5097 | |
5098 | static match | |
5099 | cray_pointer_decl (void) | |
5100 | { | |
5101 | match m; | |
5102 | gfc_array_spec *as; | |
5103 | gfc_symbol *cptr; /* Pointer symbol. */ | |
5104 | gfc_symbol *cpte; /* Pointee symbol. */ | |
5105 | locus var_locus; | |
5106 | bool done = false; | |
5107 | ||
5108 | while (!done) | |
5109 | { | |
5110 | if (gfc_match_char ('(') != MATCH_YES) | |
5111 | { | |
5112 | gfc_error ("Expected '(' at %C"); | |
e14bee04 | 5113 | return MATCH_ERROR; |
b549d2a5 | 5114 | } |
e14bee04 | 5115 | |
b549d2a5 | 5116 | /* Match pointer. */ |
5117 | var_locus = gfc_current_locus; | |
5118 | gfc_clear_attr (¤t_attr); | |
5119 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
5120 | current_ts.type = BT_INTEGER; | |
5121 | current_ts.kind = gfc_index_integer_kind; | |
5122 | ||
e14bee04 | 5123 | m = gfc_match_symbol (&cptr, 0); |
b549d2a5 | 5124 | if (m != MATCH_YES) |
5125 | { | |
5126 | gfc_error ("Expected variable name at %C"); | |
5127 | return m; | |
5128 | } | |
e14bee04 | 5129 | |
b549d2a5 | 5130 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) |
5131 | return MATCH_ERROR; | |
5132 | ||
e14bee04 | 5133 | gfc_set_sym_referenced (cptr); |
b549d2a5 | 5134 | |
5135 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
5136 | { | |
5137 | cptr->ts.type = BT_INTEGER; | |
e14bee04 | 5138 | cptr->ts.kind = gfc_index_integer_kind; |
b549d2a5 | 5139 | } |
5140 | else if (cptr->ts.type != BT_INTEGER) | |
5141 | { | |
7698a624 | 5142 | gfc_error ("Cray pointer at %C must be an integer"); |
b549d2a5 | 5143 | return MATCH_ERROR; |
5144 | } | |
5145 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
5146 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
7698a624 | 5147 | " memory addresses require %d bytes", |
1a9745d2 | 5148 | cptr->ts.kind, gfc_index_integer_kind); |
b549d2a5 | 5149 | |
5150 | if (gfc_match_char (',') != MATCH_YES) | |
5151 | { | |
5152 | gfc_error ("Expected \",\" at %C"); | |
e14bee04 | 5153 | return MATCH_ERROR; |
b549d2a5 | 5154 | } |
5155 | ||
e14bee04 | 5156 | /* Match Pointee. */ |
b549d2a5 | 5157 | var_locus = gfc_current_locus; |
5158 | gfc_clear_attr (¤t_attr); | |
5159 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
5160 | current_ts.type = BT_UNKNOWN; | |
5161 | current_ts.kind = 0; | |
5162 | ||
5163 | m = gfc_match_symbol (&cpte, 0); | |
5164 | if (m != MATCH_YES) | |
5165 | { | |
5166 | gfc_error ("Expected variable name at %C"); | |
5167 | return m; | |
5168 | } | |
e14bee04 | 5169 | |
b549d2a5 | 5170 | /* Check for an optional array spec. */ |
5171 | m = gfc_match_array_spec (&as); | |
5172 | if (m == MATCH_ERROR) | |
5173 | { | |
5174 | gfc_free_array_spec (as); | |
5175 | return m; | |
5176 | } | |
5177 | else if (m == MATCH_NO) | |
5178 | { | |
5179 | gfc_free_array_spec (as); | |
5180 | as = NULL; | |
5181 | } | |
5182 | ||
5183 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
5184 | return MATCH_ERROR; | |
5185 | ||
5186 | gfc_set_sym_referenced (cpte); | |
5187 | ||
5188 | if (cpte->as == NULL) | |
5189 | { | |
5190 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
5191 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
5192 | } | |
5193 | else if (as != NULL) | |
5194 | { | |
7698a624 | 5195 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 5196 | gfc_free_array_spec (as); |
5197 | return MATCH_ERROR; | |
5198 | } | |
5199 | ||
5200 | as = NULL; | |
5201 | ||
5202 | if (cpte->as != NULL) | |
5203 | { | |
5204 | /* Fix array spec. */ | |
5205 | m = gfc_mod_pointee_as (cpte->as); | |
5206 | if (m == MATCH_ERROR) | |
5207 | return m; | |
5208 | } | |
5209 | ||
5210 | /* Point the Pointee at the Pointer. */ | |
b7bf3f81 | 5211 | cpte->cp_pointer = cptr; |
b549d2a5 | 5212 | |
5213 | if (gfc_match_char (')') != MATCH_YES) | |
5214 | { | |
5215 | gfc_error ("Expected \")\" at %C"); | |
5216 | return MATCH_ERROR; | |
5217 | } | |
5218 | m = gfc_match_char (','); | |
5219 | if (m != MATCH_YES) | |
5220 | done = true; /* Stop searching for more declarations. */ | |
5221 | ||
5222 | } | |
5223 | ||
5224 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
5225 | || gfc_match_eos () != MATCH_YES) | |
5226 | { | |
5227 | gfc_error ("Expected \",\" or end of statement at %C"); | |
5228 | return MATCH_ERROR; | |
5229 | } | |
5230 | return MATCH_YES; | |
5231 | } | |
5232 | ||
5233 | ||
4ee9c684 | 5234 | match |
5235 | gfc_match_external (void) | |
5236 | { | |
5237 | ||
5238 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5239 | current_attr.external = 1; |
4ee9c684 | 5240 | |
5241 | return attr_decl (); | |
5242 | } | |
5243 | ||
5244 | ||
4ee9c684 | 5245 | match |
5246 | gfc_match_intent (void) | |
5247 | { | |
5248 | sym_intent intent; | |
5249 | ||
5250 | intent = match_intent_spec (); | |
5251 | if (intent == INTENT_UNKNOWN) | |
5252 | return MATCH_ERROR; | |
5253 | ||
5254 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5255 | current_attr.intent = intent; |
4ee9c684 | 5256 | |
5257 | return attr_decl (); | |
5258 | } | |
5259 | ||
5260 | ||
5261 | match | |
5262 | gfc_match_intrinsic (void) | |
5263 | { | |
5264 | ||
5265 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5266 | current_attr.intrinsic = 1; |
4ee9c684 | 5267 | |
5268 | return attr_decl (); | |
5269 | } | |
5270 | ||
5271 | ||
5272 | match | |
5273 | gfc_match_optional (void) | |
5274 | { | |
5275 | ||
5276 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5277 | current_attr.optional = 1; |
4ee9c684 | 5278 | |
5279 | return attr_decl (); | |
5280 | } | |
5281 | ||
5282 | ||
5283 | match | |
5284 | gfc_match_pointer (void) | |
5285 | { | |
b549d2a5 | 5286 | gfc_gobble_whitespace (); |
5287 | if (gfc_peek_char () == '(') | |
5288 | { | |
5289 | if (!gfc_option.flag_cray_pointer) | |
5290 | { | |
1a9745d2 | 5291 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
5292 | "flag"); | |
b549d2a5 | 5293 | return MATCH_ERROR; |
5294 | } | |
5295 | return cray_pointer_decl (); | |
5296 | } | |
5297 | else | |
5298 | { | |
5299 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5300 | current_attr.pointer = 1; |
b549d2a5 | 5301 | |
5302 | return attr_decl (); | |
5303 | } | |
4ee9c684 | 5304 | } |
5305 | ||
5306 | ||
5307 | match | |
5308 | gfc_match_allocatable (void) | |
5309 | { | |
4ee9c684 | 5310 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5311 | current_attr.allocatable = 1; |
4ee9c684 | 5312 | |
5313 | return attr_decl (); | |
5314 | } | |
5315 | ||
5316 | ||
5317 | match | |
5318 | gfc_match_dimension (void) | |
5319 | { | |
4ee9c684 | 5320 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5321 | current_attr.dimension = 1; |
4ee9c684 | 5322 | |
5323 | return attr_decl (); | |
5324 | } | |
5325 | ||
5326 | ||
5327 | match | |
5328 | gfc_match_target (void) | |
5329 | { | |
4ee9c684 | 5330 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5331 | current_attr.target = 1; |
4ee9c684 | 5332 | |
5333 | return attr_decl (); | |
5334 | } | |
5335 | ||
5336 | ||
5337 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
5338 | statement. */ | |
5339 | ||
5340 | static match | |
5341 | access_attr_decl (gfc_statement st) | |
5342 | { | |
5343 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5344 | interface_type type; | |
5345 | gfc_user_op *uop; | |
5346 | gfc_symbol *sym; | |
5347 | gfc_intrinsic_op operator; | |
5348 | match m; | |
5349 | ||
5350 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5351 | goto done; | |
5352 | ||
5353 | for (;;) | |
5354 | { | |
5355 | m = gfc_match_generic_spec (&type, name, &operator); | |
5356 | if (m == MATCH_NO) | |
5357 | goto syntax; | |
5358 | if (m == MATCH_ERROR) | |
5359 | return MATCH_ERROR; | |
5360 | ||
5361 | switch (type) | |
5362 | { | |
5363 | case INTERFACE_NAMELESS: | |
94fa7146 | 5364 | case INTERFACE_ABSTRACT: |
4ee9c684 | 5365 | goto syntax; |
5366 | ||
5367 | case INTERFACE_GENERIC: | |
5368 | if (gfc_get_symbol (name, NULL, &sym)) | |
5369 | goto done; | |
5370 | ||
1a9745d2 | 5371 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
5372 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
950683ed | 5373 | sym->name, NULL) == FAILURE) |
4ee9c684 | 5374 | return MATCH_ERROR; |
5375 | ||
5376 | break; | |
5377 | ||
5378 | case INTERFACE_INTRINSIC_OP: | |
5379 | if (gfc_current_ns->operator_access[operator] == ACCESS_UNKNOWN) | |
5380 | { | |
5381 | gfc_current_ns->operator_access[operator] = | |
5382 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
5383 | } | |
5384 | else | |
5385 | { | |
5386 | gfc_error ("Access specification of the %s operator at %C has " | |
5387 | "already been specified", gfc_op2string (operator)); | |
5388 | goto done; | |
5389 | } | |
5390 | ||
5391 | break; | |
5392 | ||
5393 | case INTERFACE_USER_OP: | |
5394 | uop = gfc_get_uop (name); | |
5395 | ||
5396 | if (uop->access == ACCESS_UNKNOWN) | |
5397 | { | |
1a9745d2 | 5398 | uop->access = (st == ST_PUBLIC) |
5399 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
4ee9c684 | 5400 | } |
5401 | else | |
5402 | { | |
1a9745d2 | 5403 | gfc_error ("Access specification of the .%s. operator at %C " |
5404 | "has already been specified", sym->name); | |
4ee9c684 | 5405 | goto done; |
5406 | } | |
5407 | ||
5408 | break; | |
5409 | } | |
5410 | ||
5411 | if (gfc_match_char (',') == MATCH_NO) | |
5412 | break; | |
5413 | } | |
5414 | ||
5415 | if (gfc_match_eos () != MATCH_YES) | |
5416 | goto syntax; | |
5417 | return MATCH_YES; | |
5418 | ||
5419 | syntax: | |
5420 | gfc_syntax_error (st); | |
5421 | ||
5422 | done: | |
5423 | return MATCH_ERROR; | |
5424 | } | |
5425 | ||
5426 | ||
3ea52af3 | 5427 | match |
5428 | gfc_match_protected (void) | |
5429 | { | |
5430 | gfc_symbol *sym; | |
5431 | match m; | |
5432 | ||
5433 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
5434 | { | |
5435 | gfc_error ("PROTECTED at %C only allowed in specification " | |
5436 | "part of a module"); | |
5437 | return MATCH_ERROR; | |
5438 | ||
5439 | } | |
5440 | ||
1a9745d2 | 5441 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
3ea52af3 | 5442 | == FAILURE) |
5443 | return MATCH_ERROR; | |
5444 | ||
5445 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5446 | { | |
5447 | return MATCH_ERROR; | |
5448 | } | |
5449 | ||
5450 | if (gfc_match_eos () == MATCH_YES) | |
5451 | goto syntax; | |
5452 | ||
5453 | for(;;) | |
5454 | { | |
5455 | m = gfc_match_symbol (&sym, 0); | |
5456 | switch (m) | |
5457 | { | |
5458 | case MATCH_YES: | |
1a9745d2 | 5459 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
5460 | == FAILURE) | |
3ea52af3 | 5461 | return MATCH_ERROR; |
5462 | goto next_item; | |
5463 | ||
5464 | case MATCH_NO: | |
5465 | break; | |
5466 | ||
5467 | case MATCH_ERROR: | |
5468 | return MATCH_ERROR; | |
5469 | } | |
5470 | ||
5471 | next_item: | |
5472 | if (gfc_match_eos () == MATCH_YES) | |
5473 | break; | |
5474 | if (gfc_match_char (',') != MATCH_YES) | |
5475 | goto syntax; | |
5476 | } | |
5477 | ||
5478 | return MATCH_YES; | |
5479 | ||
5480 | syntax: | |
5481 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
5482 | return MATCH_ERROR; | |
5483 | } | |
5484 | ||
5485 | ||
a0527218 | 5486 | /* The PRIVATE statement is a bit weird in that it can be an attribute |
4ee9c684 | 5487 | declaration, but also works as a standlone statement inside of a |
5488 | type declaration or a module. */ | |
5489 | ||
5490 | match | |
1a9745d2 | 5491 | gfc_match_private (gfc_statement *st) |
4ee9c684 | 5492 | { |
5493 | ||
5494 | if (gfc_match ("private") != MATCH_YES) | |
5495 | return MATCH_NO; | |
5496 | ||
e14bee04 | 5497 | if (gfc_current_state () != COMP_MODULE |
5498 | && (gfc_current_state () != COMP_DERIVED | |
5499 | || !gfc_state_stack->previous | |
5500 | || gfc_state_stack->previous->state != COMP_MODULE)) | |
5501 | { | |
5502 | gfc_error ("PRIVATE statement at %C is only allowed in the " | |
5503 | "specification part of a module"); | |
5504 | return MATCH_ERROR; | |
5505 | } | |
5506 | ||
4ee9c684 | 5507 | if (gfc_current_state () == COMP_DERIVED) |
5508 | { | |
5509 | if (gfc_match_eos () == MATCH_YES) | |
5510 | { | |
5511 | *st = ST_PRIVATE; | |
5512 | return MATCH_YES; | |
5513 | } | |
5514 | ||
5515 | gfc_syntax_error (ST_PRIVATE); | |
5516 | return MATCH_ERROR; | |
5517 | } | |
5518 | ||
5519 | if (gfc_match_eos () == MATCH_YES) | |
5520 | { | |
5521 | *st = ST_PRIVATE; | |
5522 | return MATCH_YES; | |
5523 | } | |
5524 | ||
5525 | *st = ST_ATTR_DECL; | |
5526 | return access_attr_decl (ST_PRIVATE); | |
5527 | } | |
5528 | ||
5529 | ||
5530 | match | |
1a9745d2 | 5531 | gfc_match_public (gfc_statement *st) |
4ee9c684 | 5532 | { |
5533 | ||
5534 | if (gfc_match ("public") != MATCH_YES) | |
5535 | return MATCH_NO; | |
5536 | ||
e14bee04 | 5537 | if (gfc_current_state () != COMP_MODULE) |
5538 | { | |
5539 | gfc_error ("PUBLIC statement at %C is only allowed in the " | |
5540 | "specification part of a module"); | |
5541 | return MATCH_ERROR; | |
5542 | } | |
5543 | ||
4ee9c684 | 5544 | if (gfc_match_eos () == MATCH_YES) |
5545 | { | |
5546 | *st = ST_PUBLIC; | |
5547 | return MATCH_YES; | |
5548 | } | |
5549 | ||
5550 | *st = ST_ATTR_DECL; | |
5551 | return access_attr_decl (ST_PUBLIC); | |
5552 | } | |
5553 | ||
5554 | ||
5555 | /* Workhorse for gfc_match_parameter. */ | |
5556 | ||
5557 | static match | |
5558 | do_parm (void) | |
5559 | { | |
5560 | gfc_symbol *sym; | |
5561 | gfc_expr *init; | |
5562 | match m; | |
5563 | ||
5564 | m = gfc_match_symbol (&sym, 0); | |
5565 | if (m == MATCH_NO) | |
5566 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
5567 | ||
5568 | if (m != MATCH_YES) | |
5569 | return m; | |
5570 | ||
5571 | if (gfc_match_char ('=') == MATCH_NO) | |
5572 | { | |
5573 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
5574 | return MATCH_ERROR; | |
5575 | } | |
5576 | ||
5577 | m = gfc_match_init_expr (&init); | |
5578 | if (m == MATCH_NO) | |
5579 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
5580 | if (m != MATCH_YES) | |
5581 | return m; | |
5582 | ||
5583 | if (sym->ts.type == BT_UNKNOWN | |
5584 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
5585 | { | |
5586 | m = MATCH_ERROR; | |
5587 | goto cleanup; | |
5588 | } | |
5589 | ||
5590 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
950683ed | 5591 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
4ee9c684 | 5592 | { |
5593 | m = MATCH_ERROR; | |
5594 | goto cleanup; | |
5595 | } | |
5596 | ||
c1b6da4a | 5597 | if (sym->ts.type == BT_CHARACTER |
5598 | && sym->ts.cl != NULL | |
5599 | && sym->ts.cl->length != NULL | |
5600 | && sym->ts.cl->length->expr_type == EXPR_CONSTANT | |
5601 | && init->expr_type == EXPR_CONSTANT | |
5602 | && init->ts.type == BT_CHARACTER | |
5603 | && init->ts.kind == 1) | |
5604 | gfc_set_constant_character_len ( | |
1bfea7e8 | 5605 | mpz_get_si (sym->ts.cl->length->value.integer), init, false); |
c1b6da4a | 5606 | |
4ee9c684 | 5607 | sym->value = init; |
5608 | return MATCH_YES; | |
5609 | ||
5610 | cleanup: | |
5611 | gfc_free_expr (init); | |
5612 | return m; | |
5613 | } | |
5614 | ||
5615 | ||
5616 | /* Match a parameter statement, with the weird syntax that these have. */ | |
5617 | ||
5618 | match | |
5619 | gfc_match_parameter (void) | |
5620 | { | |
5621 | match m; | |
5622 | ||
5623 | if (gfc_match_char ('(') == MATCH_NO) | |
5624 | return MATCH_NO; | |
5625 | ||
5626 | for (;;) | |
5627 | { | |
5628 | m = do_parm (); | |
5629 | if (m != MATCH_YES) | |
5630 | break; | |
5631 | ||
5632 | if (gfc_match (" )%t") == MATCH_YES) | |
5633 | break; | |
5634 | ||
5635 | if (gfc_match_char (',') != MATCH_YES) | |
5636 | { | |
5637 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
5638 | m = MATCH_ERROR; | |
5639 | break; | |
5640 | } | |
5641 | } | |
5642 | ||
5643 | return m; | |
5644 | } | |
5645 | ||
5646 | ||
5647 | /* Save statements have a special syntax. */ | |
5648 | ||
5649 | match | |
5650 | gfc_match_save (void) | |
5651 | { | |
82f5ee13 | 5652 | char n[GFC_MAX_SYMBOL_LEN+1]; |
5653 | gfc_common_head *c; | |
4ee9c684 | 5654 | gfc_symbol *sym; |
5655 | match m; | |
5656 | ||
5657 | if (gfc_match_eos () == MATCH_YES) | |
5658 | { | |
5659 | if (gfc_current_ns->seen_save) | |
5660 | { | |
1a9745d2 | 5661 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
5662 | "follows previous SAVE statement") | |
76e82f95 | 5663 | == FAILURE) |
5664 | return MATCH_ERROR; | |
4ee9c684 | 5665 | } |
5666 | ||
5667 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
5668 | return MATCH_YES; | |
5669 | } | |
5670 | ||
5671 | if (gfc_current_ns->save_all) | |
5672 | { | |
1a9745d2 | 5673 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
5674 | "blanket SAVE statement") | |
76e82f95 | 5675 | == FAILURE) |
5676 | return MATCH_ERROR; | |
4ee9c684 | 5677 | } |
5678 | ||
5679 | gfc_match (" ::"); | |
5680 | ||
5681 | for (;;) | |
5682 | { | |
5683 | m = gfc_match_symbol (&sym, 0); | |
5684 | switch (m) | |
5685 | { | |
5686 | case MATCH_YES: | |
1a9745d2 | 5687 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
5688 | == FAILURE) | |
4ee9c684 | 5689 | return MATCH_ERROR; |
5690 | goto next_item; | |
5691 | ||
5692 | case MATCH_NO: | |
5693 | break; | |
5694 | ||
5695 | case MATCH_ERROR: | |
5696 | return MATCH_ERROR; | |
5697 | } | |
5698 | ||
82f5ee13 | 5699 | m = gfc_match (" / %n /", &n); |
4ee9c684 | 5700 | if (m == MATCH_ERROR) |
5701 | return MATCH_ERROR; | |
5702 | if (m == MATCH_NO) | |
5703 | goto syntax; | |
5704 | ||
403ddc45 | 5705 | c = gfc_get_common (n, 0); |
82f5ee13 | 5706 | c->saved = 1; |
5707 | ||
4ee9c684 | 5708 | gfc_current_ns->seen_save = 1; |
5709 | ||
5710 | next_item: | |
5711 | if (gfc_match_eos () == MATCH_YES) | |
5712 | break; | |
5713 | if (gfc_match_char (',') != MATCH_YES) | |
5714 | goto syntax; | |
5715 | } | |
5716 | ||
5717 | return MATCH_YES; | |
5718 | ||
5719 | syntax: | |
5720 | gfc_error ("Syntax error in SAVE statement at %C"); | |
5721 | return MATCH_ERROR; | |
5722 | } | |
5723 | ||
5724 | ||
8f6339b6 | 5725 | match |
5726 | gfc_match_value (void) | |
5727 | { | |
5728 | gfc_symbol *sym; | |
5729 | match m; | |
5730 | ||
1a9745d2 | 5731 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
8f6339b6 | 5732 | == FAILURE) |
5733 | return MATCH_ERROR; | |
5734 | ||
5735 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5736 | { | |
5737 | return MATCH_ERROR; | |
5738 | } | |
5739 | ||
5740 | if (gfc_match_eos () == MATCH_YES) | |
5741 | goto syntax; | |
5742 | ||
5743 | for(;;) | |
5744 | { | |
5745 | m = gfc_match_symbol (&sym, 0); | |
5746 | switch (m) | |
5747 | { | |
5748 | case MATCH_YES: | |
1a9745d2 | 5749 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
5750 | == FAILURE) | |
8f6339b6 | 5751 | return MATCH_ERROR; |
5752 | goto next_item; | |
5753 | ||
5754 | case MATCH_NO: | |
5755 | break; | |
5756 | ||
5757 | case MATCH_ERROR: | |
5758 | return MATCH_ERROR; | |
5759 | } | |
5760 | ||
5761 | next_item: | |
5762 | if (gfc_match_eos () == MATCH_YES) | |
5763 | break; | |
5764 | if (gfc_match_char (',') != MATCH_YES) | |
5765 | goto syntax; | |
5766 | } | |
5767 | ||
5768 | return MATCH_YES; | |
5769 | ||
5770 | syntax: | |
5771 | gfc_error ("Syntax error in VALUE statement at %C"); | |
5772 | return MATCH_ERROR; | |
5773 | } | |
5774 | ||
f6d0e37a | 5775 | |
ef814c81 | 5776 | match |
5777 | gfc_match_volatile (void) | |
5778 | { | |
5779 | gfc_symbol *sym; | |
5780 | match m; | |
5781 | ||
1a9745d2 | 5782 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
ef814c81 | 5783 | == FAILURE) |
5784 | return MATCH_ERROR; | |
5785 | ||
5786 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5787 | { | |
5788 | return MATCH_ERROR; | |
5789 | } | |
5790 | ||
5791 | if (gfc_match_eos () == MATCH_YES) | |
5792 | goto syntax; | |
5793 | ||
5794 | for(;;) | |
5795 | { | |
2f241857 | 5796 | /* VOLATILE is special because it can be added to host-associated |
5797 | symbols locally. */ | |
5798 | m = gfc_match_symbol (&sym, 1); | |
ef814c81 | 5799 | switch (m) |
5800 | { | |
5801 | case MATCH_YES: | |
1a9745d2 | 5802 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
5803 | == FAILURE) | |
ef814c81 | 5804 | return MATCH_ERROR; |
5805 | goto next_item; | |
5806 | ||
5807 | case MATCH_NO: | |
5808 | break; | |
5809 | ||
5810 | case MATCH_ERROR: | |
5811 | return MATCH_ERROR; | |
5812 | } | |
5813 | ||
5814 | next_item: | |
5815 | if (gfc_match_eos () == MATCH_YES) | |
5816 | break; | |
5817 | if (gfc_match_char (',') != MATCH_YES) | |
5818 | goto syntax; | |
5819 | } | |
5820 | ||
5821 | return MATCH_YES; | |
5822 | ||
5823 | syntax: | |
5824 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
5825 | return MATCH_ERROR; | |
5826 | } | |
5827 | ||
5828 | ||
4ee9c684 | 5829 | /* Match a module procedure statement. Note that we have to modify |
5830 | symbols in the parent's namespace because the current one was there | |
89d91d02 | 5831 | to receive symbols that are in an interface's formal argument list. */ |
4ee9c684 | 5832 | |
5833 | match | |
5834 | gfc_match_modproc (void) | |
5835 | { | |
5836 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5837 | gfc_symbol *sym; | |
5838 | match m; | |
63d42079 | 5839 | gfc_namespace *module_ns; |
4ee9c684 | 5840 | |
5841 | if (gfc_state_stack->state != COMP_INTERFACE | |
5842 | || gfc_state_stack->previous == NULL | |
5cf92482 | 5843 | || current_interface.type == INTERFACE_NAMELESS |
5844 | || current_interface.type == INTERFACE_ABSTRACT) | |
4ee9c684 | 5845 | { |
1a9745d2 | 5846 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
5847 | "interface"); | |
4ee9c684 | 5848 | return MATCH_ERROR; |
5849 | } | |
5850 | ||
63d42079 | 5851 | module_ns = gfc_current_ns->parent; |
5852 | for (; module_ns; module_ns = module_ns->parent) | |
5853 | if (module_ns->proc_name->attr.flavor == FL_MODULE) | |
5854 | break; | |
5855 | ||
5856 | if (module_ns == NULL) | |
5857 | return MATCH_ERROR; | |
5858 | ||
4ee9c684 | 5859 | for (;;) |
5860 | { | |
5861 | m = gfc_match_name (name); | |
5862 | if (m == MATCH_NO) | |
5863 | goto syntax; | |
5864 | if (m != MATCH_YES) | |
5865 | return MATCH_ERROR; | |
5866 | ||
63d42079 | 5867 | if (gfc_get_symbol (name, module_ns, &sym)) |
4ee9c684 | 5868 | return MATCH_ERROR; |
5869 | ||
5870 | if (sym->attr.proc != PROC_MODULE | |
950683ed | 5871 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
5872 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 5873 | return MATCH_ERROR; |
5874 | ||
5875 | if (gfc_add_interface (sym) == FAILURE) | |
5876 | return MATCH_ERROR; | |
5877 | ||
3186f695 | 5878 | sym->attr.mod_proc = 1; |
5879 | ||
4ee9c684 | 5880 | if (gfc_match_eos () == MATCH_YES) |
5881 | break; | |
5882 | if (gfc_match_char (',') != MATCH_YES) | |
5883 | goto syntax; | |
5884 | } | |
5885 | ||
5886 | return MATCH_YES; | |
5887 | ||
5888 | syntax: | |
5889 | gfc_syntax_error (ST_MODULE_PROC); | |
5890 | return MATCH_ERROR; | |
5891 | } | |
5892 | ||
5893 | ||
c5d33754 | 5894 | /* Match the optional attribute specifiers for a type declaration. |
5895 | Return MATCH_ERROR if an error is encountered in one of the handled | |
5896 | attributes (public, private, bind(c)), MATCH_NO if what's found is | |
5897 | not a handled attribute, and MATCH_YES otherwise. TODO: More error | |
5898 | checking on attribute conflicts needs to be done. */ | |
4ee9c684 | 5899 | |
5900 | match | |
c5d33754 | 5901 | gfc_get_type_attr_spec (symbol_attribute *attr) |
4ee9c684 | 5902 | { |
c5d33754 | 5903 | /* See if the derived type is marked as private. */ |
4ee9c684 | 5904 | if (gfc_match (" , private") == MATCH_YES) |
5905 | { | |
e14bee04 | 5906 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 5907 | { |
e14bee04 | 5908 | gfc_error ("Derived type at %C can only be PRIVATE in the " |
5909 | "specification part of a module"); | |
4ee9c684 | 5910 | return MATCH_ERROR; |
5911 | } | |
5912 | ||
c5d33754 | 5913 | if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
4ee9c684 | 5914 | return MATCH_ERROR; |
4ee9c684 | 5915 | } |
c5d33754 | 5916 | else if (gfc_match (" , public") == MATCH_YES) |
4ee9c684 | 5917 | { |
e14bee04 | 5918 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 5919 | { |
e14bee04 | 5920 | gfc_error ("Derived type at %C can only be PUBLIC in the " |
5921 | "specification part of a module"); | |
4ee9c684 | 5922 | return MATCH_ERROR; |
5923 | } | |
5924 | ||
c5d33754 | 5925 | if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
4ee9c684 | 5926 | return MATCH_ERROR; |
4ee9c684 | 5927 | } |
33e86520 | 5928 | else if (gfc_match(" , bind ( c )") == MATCH_YES) |
c5d33754 | 5929 | { |
5930 | /* If the type is defined to be bind(c) it then needs to make | |
5931 | sure that all fields are interoperable. This will | |
5932 | need to be a semantic check on the finished derived type. | |
5933 | See 15.2.3 (lines 9-12) of F2003 draft. */ | |
5934 | if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) | |
5935 | return MATCH_ERROR; | |
5936 | ||
5937 | /* TODO: attr conflicts need to be checked, probably in symbol.c. */ | |
5938 | } | |
5939 | else | |
5940 | return MATCH_NO; | |
5941 | ||
5942 | /* If we get here, something matched. */ | |
5943 | return MATCH_YES; | |
5944 | } | |
5945 | ||
5946 | ||
5947 | /* Match the beginning of a derived type declaration. If a type name | |
5948 | was the result of a function, then it is possible to have a symbol | |
5949 | already to be known as a derived type yet have no components. */ | |
5950 | ||
5951 | match | |
5952 | gfc_match_derived_decl (void) | |
5953 | { | |
5954 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5955 | symbol_attribute attr; | |
5956 | gfc_symbol *sym; | |
5957 | match m; | |
5958 | match is_type_attr_spec = MATCH_NO; | |
33e86520 | 5959 | bool seen_attr = false; |
c5d33754 | 5960 | |
5961 | if (gfc_current_state () == COMP_DERIVED) | |
5962 | return MATCH_NO; | |
5963 | ||
5964 | gfc_clear_attr (&attr); | |
5965 | ||
5966 | do | |
5967 | { | |
5968 | is_type_attr_spec = gfc_get_type_attr_spec (&attr); | |
5969 | if (is_type_attr_spec == MATCH_ERROR) | |
5970 | return MATCH_ERROR; | |
33e86520 | 5971 | if (is_type_attr_spec == MATCH_YES) |
5972 | seen_attr = true; | |
c5d33754 | 5973 | } while (is_type_attr_spec == MATCH_YES); |
4ee9c684 | 5974 | |
33e86520 | 5975 | if (gfc_match (" ::") != MATCH_YES && seen_attr) |
4ee9c684 | 5976 | { |
5977 | gfc_error ("Expected :: in TYPE definition at %C"); | |
5978 | return MATCH_ERROR; | |
5979 | } | |
5980 | ||
5981 | m = gfc_match (" %n%t", name); | |
5982 | if (m != MATCH_YES) | |
5983 | return m; | |
5984 | ||
a3055431 | 5985 | /* Make sure the name is not the name of an intrinsic type. */ |
5986 | if (gfc_is_intrinsic_typename (name)) | |
4ee9c684 | 5987 | { |
1a9745d2 | 5988 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
5989 | "type", name); | |
4ee9c684 | 5990 | return MATCH_ERROR; |
5991 | } | |
5992 | ||
5993 | if (gfc_get_symbol (name, NULL, &sym)) | |
5994 | return MATCH_ERROR; | |
5995 | ||
5996 | if (sym->ts.type != BT_UNKNOWN) | |
5997 | { | |
5998 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
5999 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
6000 | return MATCH_ERROR; | |
6001 | } | |
6002 | ||
6003 | /* The symbol may already have the derived attribute without the | |
6004 | components. The ways this can happen is via a function | |
6005 | definition, an INTRINSIC statement or a subtype in another | |
6006 | derived type that is a pointer. The first part of the AND clause | |
b14e2757 | 6007 | is true if a the symbol is not the return value of a function. */ |
4ee9c684 | 6008 | if (sym->attr.flavor != FL_DERIVED |
950683ed | 6009 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 6010 | return MATCH_ERROR; |
6011 | ||
e6b82afc | 6012 | if (sym->components != NULL || sym->attr.zero_comp) |
4ee9c684 | 6013 | { |
1a9745d2 | 6014 | gfc_error ("Derived type definition of '%s' at %C has already been " |
6015 | "defined", sym->name); | |
4ee9c684 | 6016 | return MATCH_ERROR; |
6017 | } | |
6018 | ||
6019 | if (attr.access != ACCESS_UNKNOWN | |
950683ed | 6020 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
4ee9c684 | 6021 | return MATCH_ERROR; |
6022 | ||
c5d33754 | 6023 | /* See if the derived type was labeled as bind(c). */ |
6024 | if (attr.is_bind_c != 0) | |
6025 | sym->attr.is_bind_c = attr.is_bind_c; | |
6026 | ||
4ee9c684 | 6027 | gfc_new_block = sym; |
6028 | ||
6029 | return MATCH_YES; | |
6030 | } | |
b549d2a5 | 6031 | |
6032 | ||
6033 | /* Cray Pointees can be declared as: | |
6034 | pointer (ipt, a (n,m,...,*)) | |
6035 | By default, this is treated as an AS_ASSUMED_SIZE array. We'll | |
6036 | cheat and set a constant bound of 1 for the last dimension, if this | |
6037 | is the case. Since there is no bounds-checking for Cray Pointees, | |
6038 | this will be okay. */ | |
6039 | ||
6040 | try | |
6041 | gfc_mod_pointee_as (gfc_array_spec *as) | |
6042 | { | |
6043 | as->cray_pointee = true; /* This will be useful to know later. */ | |
6044 | if (as->type == AS_ASSUMED_SIZE) | |
6045 | { | |
6046 | as->type = AS_EXPLICIT; | |
6047 | as->upper[as->rank - 1] = gfc_int_expr (1); | |
6048 | as->cp_was_assumed = true; | |
6049 | } | |
6050 | else if (as->type == AS_ASSUMED_SHAPE) | |
6051 | { | |
6052 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
6053 | return MATCH_ERROR; | |
6054 | } | |
6055 | return MATCH_YES; | |
6056 | } | |
3b6a4b41 | 6057 | |
6058 | ||
6059 | /* Match the enum definition statement, here we are trying to match | |
6060 | the first line of enum definition statement. | |
6061 | Returns MATCH_YES if match is found. */ | |
6062 | ||
6063 | match | |
6064 | gfc_match_enum (void) | |
6065 | { | |
6066 | match m; | |
6067 | ||
6068 | m = gfc_match_eos (); | |
6069 | if (m != MATCH_YES) | |
6070 | return m; | |
6071 | ||
60fbbf9e | 6072 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") |
3b6a4b41 | 6073 | == FAILURE) |
6074 | return MATCH_ERROR; | |
6075 | ||
6076 | return MATCH_YES; | |
6077 | } | |
6078 | ||
6079 | ||
60fbbf9e | 6080 | /* Match a variable name with an optional initializer. When this |
6081 | subroutine is called, a variable is expected to be parsed next. | |
6082 | Depending on what is happening at the moment, updates either the | |
6083 | symbol table or the current interface. */ | |
6084 | ||
6085 | static match | |
6086 | enumerator_decl (void) | |
6087 | { | |
6088 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6089 | gfc_expr *initializer; | |
6090 | gfc_array_spec *as = NULL; | |
6091 | gfc_symbol *sym; | |
6092 | locus var_locus; | |
6093 | match m; | |
6094 | try t; | |
6095 | locus old_locus; | |
6096 | ||
6097 | initializer = NULL; | |
6098 | old_locus = gfc_current_locus; | |
6099 | ||
6100 | /* When we get here, we've just matched a list of attributes and | |
6101 | maybe a type and a double colon. The next thing we expect to see | |
6102 | is the name of the symbol. */ | |
6103 | m = gfc_match_name (name); | |
6104 | if (m != MATCH_YES) | |
6105 | goto cleanup; | |
6106 | ||
6107 | var_locus = gfc_current_locus; | |
6108 | ||
6109 | /* OK, we've successfully matched the declaration. Now put the | |
6110 | symbol in the current namespace. If we fail to create the symbol, | |
6111 | bail out. */ | |
6112 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
6113 | { | |
6114 | m = MATCH_ERROR; | |
6115 | goto cleanup; | |
6116 | } | |
6117 | ||
6118 | /* The double colon must be present in order to have initializers. | |
6119 | Otherwise the statement is ambiguous with an assignment statement. */ | |
6120 | if (colon_seen) | |
6121 | { | |
6122 | if (gfc_match_char ('=') == MATCH_YES) | |
6123 | { | |
6124 | m = gfc_match_init_expr (&initializer); | |
6125 | if (m == MATCH_NO) | |
6126 | { | |
6127 | gfc_error ("Expected an initialization expression at %C"); | |
6128 | m = MATCH_ERROR; | |
6129 | } | |
6130 | ||
6131 | if (m != MATCH_YES) | |
6132 | goto cleanup; | |
6133 | } | |
6134 | } | |
6135 | ||
6136 | /* If we do not have an initializer, the initialization value of the | |
6137 | previous enumerator (stored in last_initializer) is incremented | |
6138 | by 1 and is used to initialize the current enumerator. */ | |
6139 | if (initializer == NULL) | |
6140 | initializer = gfc_enum_initializer (last_initializer, old_locus); | |
e14bee04 | 6141 | |
60fbbf9e | 6142 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
6143 | { | |
6144 | gfc_error("ENUMERATOR %L not initialized with integer expression", | |
6145 | &var_locus); | |
e14bee04 | 6146 | m = MATCH_ERROR; |
60fbbf9e | 6147 | gfc_free_enum_history (); |
6148 | goto cleanup; | |
6149 | } | |
6150 | ||
6151 | /* Store this current initializer, for the next enumerator variable | |
6152 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
6153 | use last_initializer below. */ | |
6154 | last_initializer = initializer; | |
6155 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
6156 | ||
6157 | /* Maintain enumerator history. */ | |
6158 | gfc_find_symbol (name, NULL, 0, &sym); | |
6159 | create_enum_history (sym, last_initializer); | |
6160 | ||
6161 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
6162 | ||
6163 | cleanup: | |
6164 | /* Free stuff up and return. */ | |
6165 | gfc_free_expr (initializer); | |
6166 | ||
6167 | return m; | |
6168 | } | |
6169 | ||
6170 | ||
f6d0e37a | 6171 | /* Match the enumerator definition statement. */ |
3b6a4b41 | 6172 | |
6173 | match | |
6174 | gfc_match_enumerator_def (void) | |
6175 | { | |
6176 | match m; | |
60fbbf9e | 6177 | try t; |
e14bee04 | 6178 | |
3b6a4b41 | 6179 | gfc_clear_ts (¤t_ts); |
e14bee04 | 6180 | |
3b6a4b41 | 6181 | m = gfc_match (" enumerator"); |
6182 | if (m != MATCH_YES) | |
6183 | return m; | |
60fbbf9e | 6184 | |
6185 | m = gfc_match (" :: "); | |
6186 | if (m == MATCH_ERROR) | |
6187 | return m; | |
6188 | ||
6189 | colon_seen = (m == MATCH_YES); | |
e14bee04 | 6190 | |
3b6a4b41 | 6191 | if (gfc_current_state () != COMP_ENUM) |
6192 | { | |
6193 | gfc_error ("ENUM definition statement expected before %C"); | |
6194 | gfc_free_enum_history (); | |
6195 | return MATCH_ERROR; | |
6196 | } | |
6197 | ||
6198 | (¤t_ts)->type = BT_INTEGER; | |
6199 | (¤t_ts)->kind = gfc_c_int_kind; | |
e14bee04 | 6200 | |
60fbbf9e | 6201 | gfc_clear_attr (¤t_attr); |
6202 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
6203 | if (t == FAILURE) | |
3b6a4b41 | 6204 | { |
60fbbf9e | 6205 | m = MATCH_ERROR; |
3b6a4b41 | 6206 | goto cleanup; |
6207 | } | |
6208 | ||
3b6a4b41 | 6209 | for (;;) |
6210 | { | |
60fbbf9e | 6211 | m = enumerator_decl (); |
3b6a4b41 | 6212 | if (m == MATCH_ERROR) |
6213 | goto cleanup; | |
6214 | if (m == MATCH_NO) | |
6215 | break; | |
6216 | ||
6217 | if (gfc_match_eos () == MATCH_YES) | |
6218 | goto cleanup; | |
6219 | if (gfc_match_char (',') != MATCH_YES) | |
6220 | break; | |
6221 | } | |
6222 | ||
6223 | if (gfc_current_state () == COMP_ENUM) | |
6224 | { | |
6225 | gfc_free_enum_history (); | |
6226 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
6227 | m = MATCH_ERROR; | |
6228 | } | |
6229 | ||
6230 | cleanup: | |
6231 | gfc_free_array_spec (current_as); | |
6232 | current_as = NULL; | |
6233 | return m; | |
6234 | ||
6235 | } | |
6236 |