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4ee9c684 | 1 | /* Declaration statement matcher |
f3db21c0 | 2 | Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 |
1a9745d2 | 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 | ||
077932f9 | 89 | bool gfc_matching_function; |
67a51c8e | 90 | |
4ee9c684 | 91 | |
b4f45d02 | 92 | /********************* DATA statement subroutines *********************/ |
93 | ||
1bfea7e8 | 94 | static bool in_match_data = false; |
95 | ||
96 | bool | |
97 | gfc_in_match_data (void) | |
98 | { | |
99 | return in_match_data; | |
100 | } | |
101 | ||
cbbac028 | 102 | static void |
103 | set_in_match_data (bool set_value) | |
1bfea7e8 | 104 | { |
105 | in_match_data = set_value; | |
106 | } | |
107 | ||
b4f45d02 | 108 | /* Free a gfc_data_variable structure and everything beneath it. */ |
109 | ||
110 | static void | |
1a9745d2 | 111 | free_variable (gfc_data_variable *p) |
b4f45d02 | 112 | { |
113 | gfc_data_variable *q; | |
114 | ||
115 | for (; p; p = q) | |
116 | { | |
117 | q = p->next; | |
118 | gfc_free_expr (p->expr); | |
119 | gfc_free_iterator (&p->iter, 0); | |
120 | free_variable (p->list); | |
b4f45d02 | 121 | gfc_free (p); |
122 | } | |
123 | } | |
124 | ||
125 | ||
126 | /* Free a gfc_data_value structure and everything beneath it. */ | |
127 | ||
128 | static void | |
1a9745d2 | 129 | free_value (gfc_data_value *p) |
b4f45d02 | 130 | { |
131 | gfc_data_value *q; | |
132 | ||
133 | for (; p; p = q) | |
134 | { | |
135 | q = p->next; | |
136 | gfc_free_expr (p->expr); | |
137 | gfc_free (p); | |
138 | } | |
139 | } | |
140 | ||
141 | ||
142 | /* Free a list of gfc_data structures. */ | |
143 | ||
144 | void | |
1a9745d2 | 145 | gfc_free_data (gfc_data *p) |
b4f45d02 | 146 | { |
147 | gfc_data *q; | |
148 | ||
149 | for (; p; p = q) | |
150 | { | |
151 | q = p->next; | |
b4f45d02 | 152 | free_variable (p->var); |
153 | free_value (p->value); | |
b4f45d02 | 154 | gfc_free (p); |
155 | } | |
156 | } | |
157 | ||
158 | ||
af29c1f0 | 159 | /* Free all data in a namespace. */ |
1a9745d2 | 160 | |
af29c1f0 | 161 | static void |
f6d0e37a | 162 | gfc_free_data_all (gfc_namespace *ns) |
af29c1f0 | 163 | { |
164 | gfc_data *d; | |
165 | ||
166 | for (;ns->data;) | |
167 | { | |
168 | d = ns->data->next; | |
169 | gfc_free (ns->data); | |
170 | ns->data = d; | |
171 | } | |
172 | } | |
173 | ||
174 | ||
b4f45d02 | 175 | static match var_element (gfc_data_variable *); |
176 | ||
177 | /* Match a list of variables terminated by an iterator and a right | |
178 | parenthesis. */ | |
179 | ||
180 | static match | |
1a9745d2 | 181 | var_list (gfc_data_variable *parent) |
b4f45d02 | 182 | { |
183 | gfc_data_variable *tail, var; | |
184 | match m; | |
185 | ||
186 | m = var_element (&var); | |
187 | if (m == MATCH_ERROR) | |
188 | return MATCH_ERROR; | |
189 | if (m == MATCH_NO) | |
190 | goto syntax; | |
191 | ||
192 | tail = gfc_get_data_variable (); | |
193 | *tail = var; | |
194 | ||
195 | parent->list = tail; | |
196 | ||
197 | for (;;) | |
198 | { | |
199 | if (gfc_match_char (',') != MATCH_YES) | |
200 | goto syntax; | |
201 | ||
202 | m = gfc_match_iterator (&parent->iter, 1); | |
203 | if (m == MATCH_YES) | |
204 | break; | |
205 | if (m == MATCH_ERROR) | |
206 | return MATCH_ERROR; | |
207 | ||
208 | m = var_element (&var); | |
209 | if (m == MATCH_ERROR) | |
210 | return MATCH_ERROR; | |
211 | if (m == MATCH_NO) | |
212 | goto syntax; | |
213 | ||
214 | tail->next = gfc_get_data_variable (); | |
215 | tail = tail->next; | |
216 | ||
217 | *tail = var; | |
218 | } | |
219 | ||
220 | if (gfc_match_char (')') != MATCH_YES) | |
221 | goto syntax; | |
222 | return MATCH_YES; | |
223 | ||
224 | syntax: | |
225 | gfc_syntax_error (ST_DATA); | |
226 | return MATCH_ERROR; | |
227 | } | |
228 | ||
229 | ||
230 | /* Match a single element in a data variable list, which can be a | |
231 | variable-iterator list. */ | |
232 | ||
233 | static match | |
1a9745d2 | 234 | var_element (gfc_data_variable *new) |
b4f45d02 | 235 | { |
236 | match m; | |
237 | gfc_symbol *sym; | |
238 | ||
239 | memset (new, 0, sizeof (gfc_data_variable)); | |
240 | ||
241 | if (gfc_match_char ('(') == MATCH_YES) | |
242 | return var_list (new); | |
243 | ||
244 | m = gfc_match_variable (&new->expr, 0); | |
245 | if (m != MATCH_YES) | |
246 | return m; | |
247 | ||
248 | sym = new->expr->symtree->n.sym; | |
249 | ||
1a9745d2 | 250 | if (!sym->attr.function && gfc_current_ns->parent |
251 | && gfc_current_ns->parent == sym->ns) | |
b4f45d02 | 252 | { |
c8df3e9c | 253 | gfc_error ("Host associated variable '%s' may not be in the DATA " |
7698a624 | 254 | "statement at %C", sym->name); |
b4f45d02 | 255 | return MATCH_ERROR; |
256 | } | |
257 | ||
c8df3e9c | 258 | if (gfc_current_state () != COMP_BLOCK_DATA |
1a9745d2 | 259 | && sym->attr.in_common |
260 | && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of " | |
261 | "common block variable '%s' in DATA statement at %C", | |
262 | sym->name) == FAILURE) | |
c8df3e9c | 263 | return MATCH_ERROR; |
b4f45d02 | 264 | |
950683ed | 265 | if (gfc_add_data (&sym->attr, sym->name, &new->expr->where) == FAILURE) |
b4f45d02 | 266 | return MATCH_ERROR; |
267 | ||
268 | return MATCH_YES; | |
269 | } | |
270 | ||
271 | ||
272 | /* Match the top-level list of data variables. */ | |
273 | ||
274 | static match | |
1a9745d2 | 275 | top_var_list (gfc_data *d) |
b4f45d02 | 276 | { |
277 | gfc_data_variable var, *tail, *new; | |
278 | match m; | |
279 | ||
280 | tail = NULL; | |
281 | ||
282 | for (;;) | |
283 | { | |
284 | m = var_element (&var); | |
285 | if (m == MATCH_NO) | |
286 | goto syntax; | |
287 | if (m == MATCH_ERROR) | |
288 | return MATCH_ERROR; | |
289 | ||
290 | new = gfc_get_data_variable (); | |
291 | *new = var; | |
292 | ||
293 | if (tail == NULL) | |
294 | d->var = new; | |
295 | else | |
296 | tail->next = new; | |
297 | ||
298 | tail = new; | |
299 | ||
300 | if (gfc_match_char ('/') == MATCH_YES) | |
301 | break; | |
302 | if (gfc_match_char (',') != MATCH_YES) | |
303 | goto syntax; | |
304 | } | |
305 | ||
306 | return MATCH_YES; | |
307 | ||
308 | syntax: | |
309 | gfc_syntax_error (ST_DATA); | |
af29c1f0 | 310 | gfc_free_data_all (gfc_current_ns); |
b4f45d02 | 311 | return MATCH_ERROR; |
312 | } | |
313 | ||
314 | ||
315 | static match | |
1a9745d2 | 316 | match_data_constant (gfc_expr **result) |
b4f45d02 | 317 | { |
318 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
319 | gfc_symbol *sym; | |
320 | gfc_expr *expr; | |
321 | match m; | |
096d4ad9 | 322 | locus old_loc; |
b4f45d02 | 323 | |
324 | m = gfc_match_literal_constant (&expr, 1); | |
325 | if (m == MATCH_YES) | |
326 | { | |
327 | *result = expr; | |
328 | return MATCH_YES; | |
329 | } | |
330 | ||
331 | if (m == MATCH_ERROR) | |
332 | return MATCH_ERROR; | |
333 | ||
334 | m = gfc_match_null (result); | |
335 | if (m != MATCH_NO) | |
336 | return m; | |
337 | ||
096d4ad9 | 338 | old_loc = gfc_current_locus; |
339 | ||
340 | /* Should this be a structure component, try to match it | |
341 | before matching a name. */ | |
342 | m = gfc_match_rvalue (result); | |
343 | if (m == MATCH_ERROR) | |
344 | return m; | |
345 | ||
346 | if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE) | |
347 | { | |
348 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
349 | m = MATCH_ERROR; | |
350 | return m; | |
351 | } | |
352 | ||
353 | gfc_current_locus = old_loc; | |
354 | ||
b4f45d02 | 355 | m = gfc_match_name (name); |
356 | if (m != MATCH_YES) | |
357 | return m; | |
358 | ||
359 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
360 | return MATCH_ERROR; | |
361 | ||
362 | if (sym == NULL | |
363 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
364 | { | |
365 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
366 | name); | |
367 | return MATCH_ERROR; | |
368 | } | |
369 | else if (sym->attr.flavor == FL_DERIVED) | |
370 | return gfc_match_structure_constructor (sym, result); | |
371 | ||
f0a51891 | 372 | /* Check to see if the value is an initialization array expression. */ |
373 | if (sym->value->expr_type == EXPR_ARRAY) | |
374 | { | |
375 | gfc_current_locus = old_loc; | |
376 | ||
377 | m = gfc_match_init_expr (result); | |
378 | if (m == MATCH_ERROR) | |
379 | return m; | |
380 | ||
381 | if (m == MATCH_YES) | |
382 | { | |
383 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
384 | m = MATCH_ERROR; | |
385 | ||
386 | if ((*result)->expr_type == EXPR_CONSTANT) | |
387 | return m; | |
388 | else | |
389 | { | |
390 | gfc_error ("Invalid initializer %s in Data statement at %C", name); | |
391 | return MATCH_ERROR; | |
392 | } | |
393 | } | |
394 | } | |
395 | ||
b4f45d02 | 396 | *result = gfc_copy_expr (sym->value); |
397 | return MATCH_YES; | |
398 | } | |
399 | ||
400 | ||
401 | /* Match a list of values in a DATA statement. The leading '/' has | |
402 | already been seen at this point. */ | |
403 | ||
404 | static match | |
1a9745d2 | 405 | top_val_list (gfc_data *data) |
b4f45d02 | 406 | { |
407 | gfc_data_value *new, *tail; | |
408 | gfc_expr *expr; | |
b4f45d02 | 409 | match m; |
410 | ||
411 | tail = NULL; | |
412 | ||
413 | for (;;) | |
414 | { | |
415 | m = match_data_constant (&expr); | |
416 | if (m == MATCH_NO) | |
417 | goto syntax; | |
418 | if (m == MATCH_ERROR) | |
419 | return MATCH_ERROR; | |
420 | ||
421 | new = gfc_get_data_value (); | |
7d74abfd | 422 | mpz_init (new->repeat); |
b4f45d02 | 423 | |
424 | if (tail == NULL) | |
425 | data->value = new; | |
426 | else | |
427 | tail->next = new; | |
428 | ||
429 | tail = new; | |
430 | ||
431 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
432 | { | |
433 | tail->expr = expr; | |
7d74abfd | 434 | mpz_set_ui (tail->repeat, 1); |
b4f45d02 | 435 | } |
436 | else | |
437 | { | |
7d74abfd | 438 | if (expr->ts.type == BT_INTEGER) |
439 | mpz_set (tail->repeat, expr->value.integer); | |
b4f45d02 | 440 | gfc_free_expr (expr); |
b4f45d02 | 441 | |
442 | m = match_data_constant (&tail->expr); | |
443 | if (m == MATCH_NO) | |
444 | goto syntax; | |
445 | if (m == MATCH_ERROR) | |
446 | return MATCH_ERROR; | |
447 | } | |
448 | ||
449 | if (gfc_match_char ('/') == MATCH_YES) | |
450 | break; | |
451 | if (gfc_match_char (',') == MATCH_NO) | |
452 | goto syntax; | |
453 | } | |
454 | ||
455 | return MATCH_YES; | |
456 | ||
457 | syntax: | |
458 | gfc_syntax_error (ST_DATA); | |
af29c1f0 | 459 | gfc_free_data_all (gfc_current_ns); |
b4f45d02 | 460 | return MATCH_ERROR; |
461 | } | |
462 | ||
463 | ||
464 | /* Matches an old style initialization. */ | |
465 | ||
466 | static match | |
467 | match_old_style_init (const char *name) | |
468 | { | |
469 | match m; | |
470 | gfc_symtree *st; | |
344b937e | 471 | gfc_symbol *sym; |
b4f45d02 | 472 | gfc_data *newdata; |
473 | ||
474 | /* Set up data structure to hold initializers. */ | |
475 | gfc_find_sym_tree (name, NULL, 0, &st); | |
344b937e | 476 | sym = st->n.sym; |
477 | ||
b4f45d02 | 478 | newdata = gfc_get_data (); |
479 | newdata->var = gfc_get_data_variable (); | |
480 | newdata->var->expr = gfc_get_variable_expr (st); | |
5aed5db3 | 481 | newdata->where = gfc_current_locus; |
b4f45d02 | 482 | |
f6d0e37a | 483 | /* Match initial value list. This also eats the terminal '/'. */ |
b4f45d02 | 484 | m = top_val_list (newdata); |
485 | if (m != MATCH_YES) | |
486 | { | |
487 | gfc_free (newdata); | |
488 | return m; | |
489 | } | |
490 | ||
491 | if (gfc_pure (NULL)) | |
492 | { | |
493 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
494 | gfc_free (newdata); | |
495 | return MATCH_ERROR; | |
496 | } | |
497 | ||
344b937e | 498 | /* Mark the variable as having appeared in a data statement. */ |
499 | if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) | |
500 | { | |
501 | gfc_free (newdata); | |
502 | return MATCH_ERROR; | |
503 | } | |
504 | ||
b4f45d02 | 505 | /* Chain in namespace list of DATA initializers. */ |
506 | newdata->next = gfc_current_ns->data; | |
507 | gfc_current_ns->data = newdata; | |
508 | ||
509 | return m; | |
510 | } | |
511 | ||
1a9745d2 | 512 | |
b4f45d02 | 513 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
39fca56b | 514 | we are matching a DATA statement and are therefore issuing an error |
e14bee04 | 515 | if we encounter something unexpected, if not, we're trying to match |
fe06c0d5 | 516 | an old-style initialization expression of the form INTEGER I /2/. */ |
b4f45d02 | 517 | |
518 | match | |
519 | gfc_match_data (void) | |
520 | { | |
521 | gfc_data *new; | |
522 | match m; | |
523 | ||
cbbac028 | 524 | set_in_match_data (true); |
1bfea7e8 | 525 | |
b4f45d02 | 526 | for (;;) |
527 | { | |
528 | new = gfc_get_data (); | |
529 | new->where = gfc_current_locus; | |
530 | ||
531 | m = top_var_list (new); | |
532 | if (m != MATCH_YES) | |
533 | goto cleanup; | |
534 | ||
535 | m = top_val_list (new); | |
536 | if (m != MATCH_YES) | |
537 | goto cleanup; | |
538 | ||
539 | new->next = gfc_current_ns->data; | |
540 | gfc_current_ns->data = new; | |
541 | ||
542 | if (gfc_match_eos () == MATCH_YES) | |
543 | break; | |
544 | ||
545 | gfc_match_char (','); /* Optional comma */ | |
546 | } | |
547 | ||
cbbac028 | 548 | set_in_match_data (false); |
1bfea7e8 | 549 | |
b4f45d02 | 550 | if (gfc_pure (NULL)) |
551 | { | |
552 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
553 | return MATCH_ERROR; | |
554 | } | |
555 | ||
556 | return MATCH_YES; | |
557 | ||
558 | cleanup: | |
cbbac028 | 559 | set_in_match_data (false); |
b4f45d02 | 560 | gfc_free_data (new); |
561 | return MATCH_ERROR; | |
562 | } | |
563 | ||
564 | ||
565 | /************************ Declaration statements *********************/ | |
566 | ||
4ee9c684 | 567 | /* Match an intent specification. Since this can only happen after an |
568 | INTENT word, a legal intent-spec must follow. */ | |
569 | ||
570 | static sym_intent | |
571 | match_intent_spec (void) | |
572 | { | |
573 | ||
574 | if (gfc_match (" ( in out )") == MATCH_YES) | |
575 | return INTENT_INOUT; | |
576 | if (gfc_match (" ( in )") == MATCH_YES) | |
577 | return INTENT_IN; | |
578 | if (gfc_match (" ( out )") == MATCH_YES) | |
579 | return INTENT_OUT; | |
580 | ||
581 | gfc_error ("Bad INTENT specification at %C"); | |
582 | return INTENT_UNKNOWN; | |
583 | } | |
584 | ||
585 | ||
586 | /* Matches a character length specification, which is either a | |
587 | specification expression or a '*'. */ | |
588 | ||
589 | static match | |
1a9745d2 | 590 | char_len_param_value (gfc_expr **expr) |
4ee9c684 | 591 | { |
294d58d3 | 592 | match m; |
593 | ||
4ee9c684 | 594 | if (gfc_match_char ('*') == MATCH_YES) |
595 | { | |
596 | *expr = NULL; | |
597 | return MATCH_YES; | |
598 | } | |
599 | ||
294d58d3 | 600 | m = gfc_match_expr (expr); |
601 | if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION) | |
602 | { | |
603 | if ((*expr)->value.function.actual | |
604 | && (*expr)->value.function.actual->expr->symtree) | |
605 | { | |
606 | gfc_expr *e; | |
607 | e = (*expr)->value.function.actual->expr; | |
608 | if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE | |
609 | && e->expr_type == EXPR_VARIABLE) | |
610 | { | |
611 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) | |
612 | goto syntax; | |
613 | if (e->symtree->n.sym->ts.type == BT_CHARACTER | |
614 | && e->symtree->n.sym->ts.cl | |
615 | && e->symtree->n.sym->ts.cl->length->ts.type == BT_UNKNOWN) | |
616 | goto syntax; | |
617 | } | |
618 | } | |
619 | } | |
620 | return m; | |
621 | ||
622 | syntax: | |
623 | gfc_error ("Conflict in attributes of function argument at %C"); | |
624 | return MATCH_ERROR; | |
4ee9c684 | 625 | } |
626 | ||
627 | ||
628 | /* A character length is a '*' followed by a literal integer or a | |
629 | char_len_param_value in parenthesis. */ | |
630 | ||
631 | static match | |
1a9745d2 | 632 | match_char_length (gfc_expr **expr) |
4ee9c684 | 633 | { |
3bd3b616 | 634 | int length; |
4ee9c684 | 635 | match m; |
636 | ||
637 | m = gfc_match_char ('*'); | |
638 | if (m != MATCH_YES) | |
639 | return m; | |
640 | ||
3bd3b616 | 641 | m = gfc_match_small_literal_int (&length, NULL); |
4ee9c684 | 642 | if (m == MATCH_ERROR) |
643 | return m; | |
644 | ||
645 | if (m == MATCH_YES) | |
646 | { | |
647 | *expr = gfc_int_expr (length); | |
648 | return m; | |
649 | } | |
650 | ||
651 | if (gfc_match_char ('(') == MATCH_NO) | |
652 | goto syntax; | |
653 | ||
654 | m = char_len_param_value (expr); | |
077932f9 | 655 | if (m != MATCH_YES && gfc_matching_function) |
656 | { | |
657 | gfc_undo_symbols (); | |
658 | m = MATCH_YES; | |
659 | } | |
660 | ||
4ee9c684 | 661 | if (m == MATCH_ERROR) |
662 | return m; | |
663 | if (m == MATCH_NO) | |
664 | goto syntax; | |
665 | ||
666 | if (gfc_match_char (')') == MATCH_NO) | |
667 | { | |
668 | gfc_free_expr (*expr); | |
669 | *expr = NULL; | |
670 | goto syntax; | |
671 | } | |
672 | ||
673 | return MATCH_YES; | |
674 | ||
675 | syntax: | |
676 | gfc_error ("Syntax error in character length specification at %C"); | |
677 | return MATCH_ERROR; | |
678 | } | |
679 | ||
680 | ||
ee893be6 | 681 | /* Special subroutine for finding a symbol. Check if the name is found |
682 | in the current name space. If not, and we're compiling a function or | |
683 | subroutine and the parent compilation unit is an interface, then check | |
684 | to see if the name we've been given is the name of the interface | |
685 | (located in another namespace). */ | |
4ee9c684 | 686 | |
687 | static int | |
1a9745d2 | 688 | find_special (const char *name, gfc_symbol **result) |
4ee9c684 | 689 | { |
690 | gfc_state_data *s; | |
ee893be6 | 691 | int i; |
4ee9c684 | 692 | |
ee893be6 | 693 | i = gfc_get_symbol (name, NULL, result); |
e14bee04 | 694 | if (i == 0) |
ee893be6 | 695 | goto end; |
e14bee04 | 696 | |
4ee9c684 | 697 | if (gfc_current_state () != COMP_SUBROUTINE |
698 | && gfc_current_state () != COMP_FUNCTION) | |
ee893be6 | 699 | goto end; |
4ee9c684 | 700 | |
701 | s = gfc_state_stack->previous; | |
702 | if (s == NULL) | |
ee893be6 | 703 | goto end; |
4ee9c684 | 704 | |
705 | if (s->state != COMP_INTERFACE) | |
ee893be6 | 706 | goto end; |
4ee9c684 | 707 | if (s->sym == NULL) |
f6d0e37a | 708 | goto end; /* Nameless interface. */ |
4ee9c684 | 709 | |
710 | if (strcmp (name, s->sym->name) == 0) | |
711 | { | |
712 | *result = s->sym; | |
713 | return 0; | |
714 | } | |
715 | ||
ee893be6 | 716 | end: |
717 | return i; | |
4ee9c684 | 718 | } |
719 | ||
720 | ||
721 | /* Special subroutine for getting a symbol node associated with a | |
722 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
723 | symbol is created in the parent using with symtree node in the | |
724 | child unit pointing to the symbol. If the current namespace has no | |
725 | parent, then the symbol is just created in the current unit. */ | |
726 | ||
727 | static int | |
1a9745d2 | 728 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
4ee9c684 | 729 | { |
730 | gfc_symtree *st; | |
731 | gfc_symbol *sym; | |
2ddb8ed9 | 732 | int rc = 0; |
4ee9c684 | 733 | |
d77f260f | 734 | /* Module functions have to be left in their own namespace because |
735 | they have potentially (almost certainly!) already been referenced. | |
736 | In this sense, they are rather like external functions. This is | |
737 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
738 | space is set to point to the master function, so that the fake | |
739 | result mechanism can work. */ | |
740 | if (module_fcn_entry) | |
861d824f | 741 | { |
742 | /* Present if entry is declared to be a module procedure. */ | |
743 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); | |
c6a05992 | 744 | |
861d824f | 745 | if (*result == NULL) |
746 | rc = gfc_get_symbol (name, NULL, result); | |
a78f714d | 747 | else if (!gfc_get_symbol (name, NULL, &sym) && sym |
c6a05992 | 748 | && (*result)->ts.type == BT_UNKNOWN |
749 | && sym->attr.flavor == FL_UNKNOWN) | |
750 | /* Pick up the typespec for the entry, if declared in the function | |
751 | body. Note that this symbol is FL_UNKNOWN because it will | |
752 | only have appeared in a type declaration. The local symtree | |
753 | is set to point to the module symbol and a unique symtree | |
754 | to the local version. This latter ensures a correct clearing | |
755 | of the symbols. */ | |
a78f714d | 756 | { |
757 | /* If the ENTRY proceeds its specification, we need to ensure | |
758 | that this does not raise a "has no IMPLICIT type" error. */ | |
759 | if (sym->ts.type == BT_UNKNOWN) | |
2168078b | 760 | sym->attr.untyped = 1; |
a78f714d | 761 | |
2168078b | 762 | (*result)->ts = sym->ts; |
a78f714d | 763 | |
764 | /* Put the symbol in the procedure namespace so that, should | |
765 | the ENTRY preceed its specification, the specification | |
766 | can be applied. */ | |
767 | (*result)->ns = gfc_current_ns; | |
768 | ||
769 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); | |
770 | st->n.sym = *result; | |
771 | st = gfc_get_unique_symtree (gfc_current_ns); | |
772 | st->n.sym = sym; | |
773 | } | |
861d824f | 774 | } |
858f9894 | 775 | else |
776 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
4ee9c684 | 777 | |
2ddb8ed9 | 778 | if (rc) |
779 | return rc; | |
780 | ||
858f9894 | 781 | sym = *result; |
c717e399 | 782 | gfc_current_ns->refs++; |
4ee9c684 | 783 | |
858f9894 | 784 | if (sym && !sym->new && gfc_current_state () != COMP_INTERFACE) |
785 | { | |
16f49153 | 786 | /* Trap another encompassed procedure with the same name. All |
787 | these conditions are necessary to avoid picking up an entry | |
788 | whose name clashes with that of the encompassing procedure; | |
789 | this is handled using gsymbols to register unique,globally | |
790 | accessible names. */ | |
858f9894 | 791 | if (sym->attr.flavor != 0 |
1a9745d2 | 792 | && sym->attr.proc != 0 |
793 | && (sym->attr.subroutine || sym->attr.function) | |
794 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
858f9894 | 795 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
796 | name, &sym->declared_at); | |
797 | ||
5720fd2f | 798 | /* Trap a procedure with a name the same as interface in the |
799 | encompassing scope. */ | |
800 | if (sym->attr.generic != 0 | |
db697236 | 801 | && (sym->attr.subroutine || sym->attr.function) |
802 | && !sym->attr.mod_proc) | |
5720fd2f | 803 | gfc_error_now ("Name '%s' at %C is already defined" |
804 | " as a generic interface at %L", | |
805 | name, &sym->declared_at); | |
806 | ||
858f9894 | 807 | /* Trap declarations of attributes in encompassing scope. The |
808 | signature for this is that ts.kind is set. Legitimate | |
809 | references only set ts.type. */ | |
810 | if (sym->ts.kind != 0 | |
1a9745d2 | 811 | && !sym->attr.implicit_type |
812 | && sym->attr.proc == 0 | |
813 | && gfc_current_ns->parent != NULL | |
814 | && sym->attr.access == 0 | |
815 | && !module_fcn_entry) | |
816 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
817 | "and must not have attributes declared at %L", | |
858f9894 | 818 | name, &sym->declared_at); |
819 | } | |
820 | ||
821 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
822 | return rc; | |
4ee9c684 | 823 | |
d77f260f | 824 | /* Module function entries will already have a symtree in |
825 | the current namespace but will need one at module level. */ | |
826 | if (module_fcn_entry) | |
861d824f | 827 | { |
828 | /* Present if entry is declared to be a module procedure. */ | |
829 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); | |
830 | if (st == NULL) | |
831 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
832 | } | |
d77f260f | 833 | else |
834 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
4ee9c684 | 835 | |
4ee9c684 | 836 | st->n.sym = sym; |
837 | sym->refs++; | |
838 | ||
f6d0e37a | 839 | /* See if the procedure should be a module procedure. */ |
4ee9c684 | 840 | |
d77f260f | 841 | if (((sym->ns->proc_name != NULL |
861d824f | 842 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
843 | && sym->attr.proc != PROC_MODULE) | |
844 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) | |
845 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
846 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 847 | rc = 2; |
848 | ||
849 | return rc; | |
850 | } | |
851 | ||
852 | ||
c5d33754 | 853 | /* Verify that the given symbol representing a parameter is C |
854 | interoperable, by checking to see if it was marked as such after | |
855 | its declaration. If the given symbol is not interoperable, a | |
856 | warning is reported, thus removing the need to return the status to | |
857 | the calling function. The standard does not require the user use | |
858 | one of the iso_c_binding named constants to declare an | |
859 | interoperable parameter, but we can't be sure if the param is C | |
860 | interop or not if the user doesn't. For example, integer(4) may be | |
861 | legal Fortran, but doesn't have meaning in C. It may interop with | |
862 | a number of the C types, which causes a problem because the | |
863 | compiler can't know which one. This code is almost certainly not | |
864 | portable, and the user will get what they deserve if the C type | |
865 | across platforms isn't always interoperable with integer(4). If | |
866 | the user had used something like integer(c_int) or integer(c_long), | |
867 | the compiler could have automatically handled the varying sizes | |
868 | across platforms. */ | |
869 | ||
870 | try | |
871 | verify_c_interop_param (gfc_symbol *sym) | |
872 | { | |
873 | int is_c_interop = 0; | |
874 | try retval = SUCCESS; | |
875 | ||
876 | /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). | |
877 | Don't repeat the checks here. */ | |
878 | if (sym->attr.implicit_type) | |
879 | return SUCCESS; | |
880 | ||
881 | /* For subroutines or functions that are passed to a BIND(C) procedure, | |
882 | they're interoperable if they're BIND(C) and their params are all | |
883 | interoperable. */ | |
884 | if (sym->attr.flavor == FL_PROCEDURE) | |
885 | { | |
886 | if (sym->attr.is_bind_c == 0) | |
887 | { | |
888 | gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " | |
889 | "attribute to be C interoperable", sym->name, | |
890 | &(sym->declared_at)); | |
891 | ||
892 | return FAILURE; | |
893 | } | |
894 | else | |
895 | { | |
896 | if (sym->attr.is_c_interop == 1) | |
897 | /* We've already checked this procedure; don't check it again. */ | |
898 | return SUCCESS; | |
899 | else | |
900 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, | |
901 | sym->common_block); | |
902 | } | |
903 | } | |
904 | ||
905 | /* See if we've stored a reference to a procedure that owns sym. */ | |
906 | if (sym->ns != NULL && sym->ns->proc_name != NULL) | |
907 | { | |
908 | if (sym->ns->proc_name->attr.is_bind_c == 1) | |
909 | { | |
910 | is_c_interop = | |
911 | (verify_c_interop (&(sym->ts), sym->name, &(sym->declared_at)) | |
912 | == SUCCESS ? 1 : 0); | |
913 | ||
914 | if (is_c_interop != 1) | |
915 | { | |
916 | /* Make personalized messages to give better feedback. */ | |
917 | if (sym->ts.type == BT_DERIVED) | |
918 | gfc_error ("Type '%s' at %L is a parameter to the BIND(C) " | |
919 | " procedure '%s' but is not C interoperable " | |
920 | "because derived type '%s' is not C interoperable", | |
921 | sym->name, &(sym->declared_at), | |
922 | sym->ns->proc_name->name, | |
923 | sym->ts.derived->name); | |
924 | else | |
925 | gfc_warning ("Variable '%s' at %L is a parameter to the " | |
926 | "BIND(C) procedure '%s' but may not be C " | |
927 | "interoperable", | |
928 | sym->name, &(sym->declared_at), | |
929 | sym->ns->proc_name->name); | |
930 | } | |
e4eda3ec | 931 | |
932 | /* Character strings are only C interoperable if they have a | |
933 | length of 1. */ | |
934 | if (sym->ts.type == BT_CHARACTER) | |
935 | { | |
936 | gfc_charlen *cl = sym->ts.cl; | |
937 | if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT | |
938 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) | |
939 | { | |
940 | gfc_error ("Character argument '%s' at %L " | |
941 | "must be length 1 because " | |
942 | "procedure '%s' is BIND(C)", | |
943 | sym->name, &sym->declared_at, | |
944 | sym->ns->proc_name->name); | |
945 | retval = FAILURE; | |
946 | } | |
947 | } | |
948 | ||
c5d33754 | 949 | /* We have to make sure that any param to a bind(c) routine does |
950 | not have the allocatable, pointer, or optional attributes, | |
951 | according to J3/04-007, section 5.1. */ | |
952 | if (sym->attr.allocatable == 1) | |
953 | { | |
954 | gfc_error ("Variable '%s' at %L cannot have the " | |
955 | "ALLOCATABLE attribute because procedure '%s'" | |
956 | " is BIND(C)", sym->name, &(sym->declared_at), | |
957 | sym->ns->proc_name->name); | |
958 | retval = FAILURE; | |
959 | } | |
960 | ||
961 | if (sym->attr.pointer == 1) | |
962 | { | |
963 | gfc_error ("Variable '%s' at %L cannot have the " | |
964 | "POINTER attribute because procedure '%s'" | |
965 | " is BIND(C)", sym->name, &(sym->declared_at), | |
966 | sym->ns->proc_name->name); | |
967 | retval = FAILURE; | |
968 | } | |
969 | ||
970 | if (sym->attr.optional == 1) | |
971 | { | |
972 | gfc_error ("Variable '%s' at %L cannot have the " | |
973 | "OPTIONAL attribute because procedure '%s'" | |
974 | " is BIND(C)", sym->name, &(sym->declared_at), | |
975 | sym->ns->proc_name->name); | |
976 | retval = FAILURE; | |
977 | } | |
978 | ||
979 | /* Make sure that if it has the dimension attribute, that it is | |
980 | either assumed size or explicit shape. */ | |
981 | if (sym->as != NULL) | |
982 | { | |
983 | if (sym->as->type == AS_ASSUMED_SHAPE) | |
984 | { | |
985 | gfc_error ("Assumed-shape array '%s' at %L cannot be an " | |
986 | "argument to the procedure '%s' at %L because " | |
987 | "the procedure is BIND(C)", sym->name, | |
988 | &(sym->declared_at), sym->ns->proc_name->name, | |
989 | &(sym->ns->proc_name->declared_at)); | |
990 | retval = FAILURE; | |
991 | } | |
992 | ||
993 | if (sym->as->type == AS_DEFERRED) | |
994 | { | |
995 | gfc_error ("Deferred-shape array '%s' at %L cannot be an " | |
996 | "argument to the procedure '%s' at %L because " | |
997 | "the procedure is BIND(C)", sym->name, | |
998 | &(sym->declared_at), sym->ns->proc_name->name, | |
999 | &(sym->ns->proc_name->declared_at)); | |
1000 | retval = FAILURE; | |
1001 | } | |
1002 | } | |
1003 | } | |
1004 | } | |
1005 | ||
1006 | return retval; | |
1007 | } | |
1008 | ||
1009 | ||
1010 | /* Function called by variable_decl() that adds a name to the symbol table. */ | |
4ee9c684 | 1011 | |
1012 | static try | |
1a9745d2 | 1013 | build_sym (const char *name, gfc_charlen *cl, |
1014 | gfc_array_spec **as, locus *var_locus) | |
4ee9c684 | 1015 | { |
1016 | symbol_attribute attr; | |
1017 | gfc_symbol *sym; | |
1018 | ||
ee893be6 | 1019 | if (gfc_get_symbol (name, NULL, &sym)) |
4ee9c684 | 1020 | return FAILURE; |
1021 | ||
f6d0e37a | 1022 | /* Start updating the symbol table. Add basic type attribute if present. */ |
4ee9c684 | 1023 | if (current_ts.type != BT_UNKNOWN |
1a9745d2 | 1024 | && (sym->attr.implicit_type == 0 |
1025 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
4ee9c684 | 1026 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
1027 | return FAILURE; | |
1028 | ||
1029 | if (sym->ts.type == BT_CHARACTER) | |
1030 | sym->ts.cl = cl; | |
1031 | ||
1032 | /* Add dimension attribute if present. */ | |
1033 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
1034 | return FAILURE; | |
1035 | *as = NULL; | |
1036 | ||
1037 | /* Add attribute to symbol. The copy is so that we can reset the | |
1038 | dimension attribute. */ | |
1039 | attr = current_attr; | |
1040 | attr.dimension = 0; | |
1041 | ||
1042 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
1043 | return FAILURE; | |
1044 | ||
c5d33754 | 1045 | /* Finish any work that may need to be done for the binding label, |
1046 | if it's a bind(c). The bind(c) attr is found before the symbol | |
1047 | is made, and before the symbol name (for data decls), so the | |
1048 | current_ts is holding the binding label, or nothing if the | |
1049 | name= attr wasn't given. Therefore, test here if we're dealing | |
1050 | with a bind(c) and make sure the binding label is set correctly. */ | |
1051 | if (sym->attr.is_bind_c == 1) | |
1052 | { | |
1053 | if (sym->binding_label[0] == '\0') | |
1054 | { | |
825718f9 | 1055 | /* Set the binding label and verify that if a NAME= was specified |
1056 | then only one identifier was in the entity-decl-list. */ | |
1057 | if (set_binding_label (sym->binding_label, sym->name, | |
1058 | num_idents_on_line) == FAILURE) | |
c5d33754 | 1059 | return FAILURE; |
1060 | } | |
1061 | } | |
1062 | ||
1063 | /* See if we know we're in a common block, and if it's a bind(c) | |
1064 | common then we need to make sure we're an interoperable type. */ | |
1065 | if (sym->attr.in_common == 1) | |
1066 | { | |
1067 | /* Test the common block object. */ | |
1068 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 | |
1069 | && sym->ts.is_c_interop != 1) | |
1070 | { | |
1071 | gfc_error_now ("Variable '%s' in common block '%s' at %C " | |
1072 | "must be declared with a C interoperable " | |
1073 | "kind since common block '%s' is BIND(C)", | |
1074 | sym->name, sym->common_block->name, | |
1075 | sym->common_block->name); | |
1076 | gfc_clear_error (); | |
1077 | } | |
1078 | } | |
1079 | ||
2457a77e | 1080 | sym->attr.implied_index = 0; |
1081 | ||
4ee9c684 | 1082 | return SUCCESS; |
1083 | } | |
1084 | ||
1a9745d2 | 1085 | |
a270dc8e | 1086 | /* Set character constant to the given length. The constant will be padded or |
1087 | truncated. */ | |
1088 | ||
1089 | void | |
1a9745d2 | 1090 | gfc_set_constant_character_len (int len, gfc_expr *expr, bool array) |
a270dc8e | 1091 | { |
c32f863c | 1092 | gfc_char_t *s; |
a270dc8e | 1093 | int slen; |
1094 | ||
1095 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
b44437b9 | 1096 | gcc_assert (expr->ts.type == BT_CHARACTER); |
a270dc8e | 1097 | |
1098 | slen = expr->value.character.length; | |
1099 | if (len != slen) | |
1100 | { | |
c32f863c | 1101 | s = gfc_get_wide_string (len + 1); |
1102 | memcpy (s, expr->value.character.string, | |
1103 | MIN (len, slen) * sizeof (gfc_char_t)); | |
a270dc8e | 1104 | if (len > slen) |
c32f863c | 1105 | gfc_wide_memset (&s[slen], ' ', len - slen); |
1bfea7e8 | 1106 | |
1107 | if (gfc_option.warn_character_truncation && slen > len) | |
1108 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
1109 | "(%d/%d)", &expr->where, slen, len); | |
1110 | ||
1111 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
1112 | initializers. */ | |
1113 | if (array && slen < len && !(gfc_option.allow_std & GFC_STD_GNU)) | |
1114 | gfc_error_now ("The CHARACTER elements of the array constructor " | |
1115 | "at %L must have the same length (%d/%d)", | |
1a9745d2 | 1116 | &expr->where, slen, len); |
1bfea7e8 | 1117 | |
89f528df | 1118 | s[len] = '\0'; |
a270dc8e | 1119 | gfc_free (expr->value.character.string); |
1120 | expr->value.character.string = s; | |
1121 | expr->value.character.length = len; | |
1122 | } | |
1123 | } | |
4ee9c684 | 1124 | |
3b6a4b41 | 1125 | |
e14bee04 | 1126 | /* Function to create and update the enumerator history |
3b6a4b41 | 1127 | using the information passed as arguments. |
e14bee04 | 1128 | Pointer "max_enum" is also updated, to point to |
1129 | enum history node containing largest initializer. | |
3b6a4b41 | 1130 | |
1131 | SYM points to the symbol node of enumerator. | |
f6d0e37a | 1132 | INIT points to its enumerator value. */ |
3b6a4b41 | 1133 | |
e14bee04 | 1134 | static void |
1a9745d2 | 1135 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
3b6a4b41 | 1136 | { |
1137 | enumerator_history *new_enum_history; | |
1138 | gcc_assert (sym != NULL && init != NULL); | |
1139 | ||
1140 | new_enum_history = gfc_getmem (sizeof (enumerator_history)); | |
1141 | ||
1142 | new_enum_history->sym = sym; | |
1143 | new_enum_history->initializer = init; | |
1144 | new_enum_history->next = NULL; | |
1145 | ||
1146 | if (enum_history == NULL) | |
1147 | { | |
1148 | enum_history = new_enum_history; | |
1149 | max_enum = enum_history; | |
1150 | } | |
1151 | else | |
1152 | { | |
1153 | new_enum_history->next = enum_history; | |
1154 | enum_history = new_enum_history; | |
1155 | ||
e14bee04 | 1156 | if (mpz_cmp (max_enum->initializer->value.integer, |
3b6a4b41 | 1157 | new_enum_history->initializer->value.integer) < 0) |
1a9745d2 | 1158 | max_enum = new_enum_history; |
3b6a4b41 | 1159 | } |
1160 | } | |
1161 | ||
1162 | ||
e14bee04 | 1163 | /* Function to free enum kind history. */ |
3b6a4b41 | 1164 | |
e14bee04 | 1165 | void |
1a9745d2 | 1166 | gfc_free_enum_history (void) |
3b6a4b41 | 1167 | { |
e14bee04 | 1168 | enumerator_history *current = enum_history; |
1169 | enumerator_history *next; | |
3b6a4b41 | 1170 | |
1171 | while (current != NULL) | |
1172 | { | |
1173 | next = current->next; | |
1174 | gfc_free (current); | |
1175 | current = next; | |
1176 | } | |
1177 | max_enum = NULL; | |
1178 | enum_history = NULL; | |
1179 | } | |
1180 | ||
1181 | ||
4ee9c684 | 1182 | /* Function called by variable_decl() that adds an initialization |
1183 | expression to a symbol. */ | |
1184 | ||
1185 | static try | |
f6d0e37a | 1186 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) |
4ee9c684 | 1187 | { |
1188 | symbol_attribute attr; | |
1189 | gfc_symbol *sym; | |
1190 | gfc_expr *init; | |
1191 | ||
1192 | init = *initp; | |
1193 | if (find_special (name, &sym)) | |
1194 | return FAILURE; | |
1195 | ||
1196 | attr = sym->attr; | |
1197 | ||
1198 | /* If this symbol is confirming an implicit parameter type, | |
1199 | then an initialization expression is not allowed. */ | |
1200 | if (attr.flavor == FL_PARAMETER | |
1201 | && sym->value != NULL | |
1202 | && *initp != NULL) | |
1203 | { | |
1204 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
1205 | sym->name); | |
1206 | return FAILURE; | |
1207 | } | |
1208 | ||
1209 | if (init == NULL) | |
1210 | { | |
1211 | /* An initializer is required for PARAMETER declarations. */ | |
1212 | if (attr.flavor == FL_PARAMETER) | |
1213 | { | |
1214 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
1215 | return FAILURE; | |
1216 | } | |
1217 | } | |
1218 | else | |
1219 | { | |
1220 | /* If a variable appears in a DATA block, it cannot have an | |
b97f1a18 | 1221 | initializer. */ |
4ee9c684 | 1222 | if (sym->attr.data) |
1223 | { | |
1a9745d2 | 1224 | gfc_error ("Variable '%s' at %C with an initializer already " |
1225 | "appears in a DATA statement", sym->name); | |
4ee9c684 | 1226 | return FAILURE; |
1227 | } | |
1228 | ||
cca3db55 | 1229 | /* Check if the assignment can happen. This has to be put off |
1230 | until later for a derived type variable. */ | |
4ee9c684 | 1231 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
1232 | && gfc_check_assign_symbol (sym, init) == FAILURE) | |
1233 | return FAILURE; | |
1234 | ||
a270dc8e | 1235 | if (sym->ts.type == BT_CHARACTER && sym->ts.cl) |
1236 | { | |
1237 | /* Update symbol character length according initializer. */ | |
1238 | if (sym->ts.cl->length == NULL) | |
1239 | { | |
03c2a028 | 1240 | int clen; |
f6d0e37a | 1241 | /* If there are multiple CHARACTER variables declared on the |
1242 | same line, we don't want them to share the same length. */ | |
ea13b9b7 | 1243 | sym->ts.cl = gfc_get_charlen (); |
1244 | sym->ts.cl->next = gfc_current_ns->cl_list; | |
1245 | gfc_current_ns->cl_list = sym->ts.cl; | |
e9c873a4 | 1246 | |
03c2a028 | 1247 | if (sym->attr.flavor == FL_PARAMETER) |
1248 | { | |
1249 | if (init->expr_type == EXPR_CONSTANT) | |
1250 | { | |
1251 | clen = init->value.character.length; | |
1252 | sym->ts.cl->length = gfc_int_expr (clen); | |
1253 | } | |
1254 | else if (init->expr_type == EXPR_ARRAY) | |
1255 | { | |
1256 | gfc_expr *p = init->value.constructor->expr; | |
1257 | clen = p->value.character.length; | |
1258 | sym->ts.cl->length = gfc_int_expr (clen); | |
1259 | } | |
1260 | else if (init->ts.cl && init->ts.cl->length) | |
1261 | sym->ts.cl->length = | |
1262 | gfc_copy_expr (sym->value->ts.cl->length); | |
1263 | } | |
a270dc8e | 1264 | } |
1265 | /* Update initializer character length according symbol. */ | |
1266 | else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT) | |
1267 | { | |
1268 | int len = mpz_get_si (sym->ts.cl->length->value.integer); | |
1269 | gfc_constructor * p; | |
1270 | ||
1271 | if (init->expr_type == EXPR_CONSTANT) | |
1bfea7e8 | 1272 | gfc_set_constant_character_len (len, init, false); |
a270dc8e | 1273 | else if (init->expr_type == EXPR_ARRAY) |
1274 | { | |
39908fd9 | 1275 | /* Build a new charlen to prevent simplification from |
1276 | deleting the length before it is resolved. */ | |
1277 | init->ts.cl = gfc_get_charlen (); | |
1278 | init->ts.cl->next = gfc_current_ns->cl_list; | |
1279 | gfc_current_ns->cl_list = sym->ts.cl; | |
a270dc8e | 1280 | init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length); |
39908fd9 | 1281 | |
a270dc8e | 1282 | for (p = init->value.constructor; p; p = p->next) |
1bfea7e8 | 1283 | gfc_set_constant_character_len (len, p->expr, false); |
a270dc8e | 1284 | } |
1285 | } | |
1286 | } | |
1287 | ||
c5d33754 | 1288 | /* Need to check if the expression we initialized this |
1289 | to was one of the iso_c_binding named constants. If so, | |
1290 | and we're a parameter (constant), let it be iso_c. | |
1291 | For example: | |
1292 | integer(c_int), parameter :: my_int = c_int | |
1293 | integer(my_int) :: my_int_2 | |
1294 | If we mark my_int as iso_c (since we can see it's value | |
1295 | is equal to one of the named constants), then my_int_2 | |
1296 | will be considered C interoperable. */ | |
1297 | if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) | |
1298 | { | |
1299 | sym->ts.is_iso_c |= init->ts.is_iso_c; | |
1300 | sym->ts.is_c_interop |= init->ts.is_c_interop; | |
1301 | /* attr bits needed for module files. */ | |
1302 | sym->attr.is_iso_c |= init->ts.is_iso_c; | |
1303 | sym->attr.is_c_interop |= init->ts.is_c_interop; | |
1304 | if (init->ts.is_iso_c) | |
1305 | sym->ts.f90_type = init->ts.f90_type; | |
1306 | } | |
1307 | ||
4ee9c684 | 1308 | /* Add initializer. Make sure we keep the ranks sane. */ |
1309 | if (sym->attr.dimension && init->rank == 0) | |
7baa3fb4 | 1310 | { |
1311 | mpz_t size; | |
1312 | gfc_expr *array; | |
1313 | gfc_constructor *c; | |
1314 | int n; | |
1315 | if (sym->attr.flavor == FL_PARAMETER | |
1316 | && init->expr_type == EXPR_CONSTANT | |
1317 | && spec_size (sym->as, &size) == SUCCESS | |
1318 | && mpz_cmp_si (size, 0) > 0) | |
1319 | { | |
1320 | array = gfc_start_constructor (init->ts.type, init->ts.kind, | |
1321 | &init->where); | |
1322 | ||
1323 | array->value.constructor = c = NULL; | |
1324 | for (n = 0; n < (int)mpz_get_si (size); n++) | |
1325 | { | |
1326 | if (array->value.constructor == NULL) | |
1327 | { | |
1328 | array->value.constructor = c = gfc_get_constructor (); | |
1329 | c->expr = init; | |
1330 | } | |
1331 | else | |
1332 | { | |
1333 | c->next = gfc_get_constructor (); | |
1334 | c = c->next; | |
1335 | c->expr = gfc_copy_expr (init); | |
1336 | } | |
1337 | } | |
1338 | ||
1339 | array->shape = gfc_get_shape (sym->as->rank); | |
1340 | for (n = 0; n < sym->as->rank; n++) | |
1341 | spec_dimen_size (sym->as, n, &array->shape[n]); | |
1342 | ||
1343 | init = array; | |
1344 | mpz_clear (size); | |
1345 | } | |
1346 | init->rank = sym->as->rank; | |
1347 | } | |
4ee9c684 | 1348 | |
1349 | sym->value = init; | |
3cd3c667 | 1350 | if (sym->attr.save == SAVE_NONE) |
1351 | sym->attr.save = SAVE_IMPLICIT; | |
4ee9c684 | 1352 | *initp = NULL; |
1353 | } | |
1354 | ||
1355 | return SUCCESS; | |
1356 | } | |
1357 | ||
1358 | ||
1359 | /* Function called by variable_decl() that adds a name to a structure | |
1360 | being built. */ | |
1361 | ||
1362 | static try | |
1a9745d2 | 1363 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
1364 | gfc_array_spec **as) | |
4ee9c684 | 1365 | { |
1366 | gfc_component *c; | |
1367 | ||
1368 | /* If the current symbol is of the same derived type that we're | |
1369 | constructing, it must have the pointer attribute. */ | |
1370 | if (current_ts.type == BT_DERIVED | |
1371 | && current_ts.derived == gfc_current_block () | |
1372 | && current_attr.pointer == 0) | |
1373 | { | |
1374 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1375 | return FAILURE; | |
1376 | } | |
1377 | ||
1a9745d2 | 1378 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
4ee9c684 | 1379 | { |
1380 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1381 | { | |
1382 | gfc_error ("Array component of structure at %C must have explicit " | |
1383 | "or deferred shape"); | |
1384 | return FAILURE; | |
1385 | } | |
1386 | } | |
1387 | ||
1388 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1389 | return FAILURE; | |
1390 | ||
1391 | c->ts = current_ts; | |
1392 | c->ts.cl = cl; | |
1393 | gfc_set_component_attr (c, ¤t_attr); | |
1394 | ||
1395 | c->initializer = *init; | |
1396 | *init = NULL; | |
1397 | ||
1398 | c->as = *as; | |
1399 | if (c->as != NULL) | |
1400 | c->dimension = 1; | |
1401 | *as = NULL; | |
1402 | ||
a2f51d5f | 1403 | /* Should this ever get more complicated, combine with similar section |
1404 | in add_init_expr_to_sym into a separate function. */ | |
1405 | if (c->ts.type == BT_CHARACTER && !c->pointer && c->initializer) | |
1406 | { | |
1407 | int len = mpz_get_si (c->ts.cl->length->value.integer); | |
1408 | ||
1409 | if (c->initializer->expr_type == EXPR_CONSTANT) | |
1410 | gfc_set_constant_character_len (len, c->initializer, false); | |
1411 | else if (mpz_cmp (c->ts.cl->length->value.integer, | |
1412 | c->initializer->ts.cl->length->value.integer)) | |
1413 | { | |
1414 | gfc_constructor *ctor = c->initializer->value.constructor; | |
1415 | for (;ctor ; ctor = ctor->next) | |
1416 | if (ctor->expr->expr_type == EXPR_CONSTANT) | |
1417 | gfc_set_constant_character_len (len, ctor->expr, true); | |
1418 | } | |
1419 | } | |
1420 | ||
4ee9c684 | 1421 | /* Check array components. */ |
1422 | if (!c->dimension) | |
2294b616 | 1423 | { |
1424 | if (c->allocatable) | |
1425 | { | |
1426 | gfc_error ("Allocatable component at %C must be an array"); | |
1427 | return FAILURE; | |
1428 | } | |
1429 | else | |
1430 | return SUCCESS; | |
1431 | } | |
4ee9c684 | 1432 | |
1433 | if (c->pointer) | |
1434 | { | |
1435 | if (c->as->type != AS_DEFERRED) | |
1436 | { | |
2294b616 | 1437 | gfc_error ("Pointer array component of structure at %C must have a " |
1438 | "deferred shape"); | |
1439 | return FAILURE; | |
1440 | } | |
1441 | } | |
1442 | else if (c->allocatable) | |
1443 | { | |
1444 | if (c->as->type != AS_DEFERRED) | |
1445 | { | |
1446 | gfc_error ("Allocatable component of structure at %C must have a " | |
1447 | "deferred shape"); | |
4ee9c684 | 1448 | return FAILURE; |
1449 | } | |
1450 | } | |
1451 | else | |
1452 | { | |
1453 | if (c->as->type != AS_EXPLICIT) | |
1454 | { | |
1a9745d2 | 1455 | gfc_error ("Array component of structure at %C must have an " |
1456 | "explicit shape"); | |
4ee9c684 | 1457 | return FAILURE; |
1458 | } | |
1459 | } | |
1460 | ||
1461 | return SUCCESS; | |
1462 | } | |
1463 | ||
1464 | ||
1465 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1466 | ||
1467 | match | |
1a9745d2 | 1468 | gfc_match_null (gfc_expr **result) |
4ee9c684 | 1469 | { |
1470 | gfc_symbol *sym; | |
1471 | gfc_expr *e; | |
1472 | match m; | |
1473 | ||
1474 | m = gfc_match (" null ( )"); | |
1475 | if (m != MATCH_YES) | |
1476 | return m; | |
1477 | ||
1478 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1479 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1480 | { | |
1481 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1482 | return MATCH_ERROR; | |
1483 | } | |
1484 | ||
1485 | gfc_intrinsic_symbol (sym); | |
1486 | ||
1487 | if (sym->attr.proc != PROC_INTRINSIC | |
950683ed | 1488 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1489 | sym->name, NULL) == FAILURE | |
1490 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
4ee9c684 | 1491 | return MATCH_ERROR; |
1492 | ||
1493 | e = gfc_get_expr (); | |
cbb9e6aa | 1494 | e->where = gfc_current_locus; |
4ee9c684 | 1495 | e->expr_type = EXPR_NULL; |
1496 | e->ts.type = BT_UNKNOWN; | |
1497 | ||
1498 | *result = e; | |
1499 | ||
1500 | return MATCH_YES; | |
1501 | } | |
1502 | ||
1503 | ||
4ee9c684 | 1504 | /* Match a variable name with an optional initializer. When this |
1505 | subroutine is called, a variable is expected to be parsed next. | |
1506 | Depending on what is happening at the moment, updates either the | |
1507 | symbol table or the current interface. */ | |
1508 | ||
1509 | static match | |
3923b69f | 1510 | variable_decl (int elem) |
4ee9c684 | 1511 | { |
1512 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1513 | gfc_expr *initializer, *char_len; | |
1514 | gfc_array_spec *as; | |
b549d2a5 | 1515 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
4ee9c684 | 1516 | gfc_charlen *cl; |
1517 | locus var_locus; | |
1518 | match m; | |
1519 | try t; | |
b549d2a5 | 1520 | gfc_symbol *sym; |
3b6a4b41 | 1521 | locus old_locus; |
4ee9c684 | 1522 | |
1523 | initializer = NULL; | |
1524 | as = NULL; | |
b549d2a5 | 1525 | cp_as = NULL; |
3b6a4b41 | 1526 | old_locus = gfc_current_locus; |
4ee9c684 | 1527 | |
1528 | /* When we get here, we've just matched a list of attributes and | |
1529 | maybe a type and a double colon. The next thing we expect to see | |
1530 | is the name of the symbol. */ | |
1531 | m = gfc_match_name (name); | |
1532 | if (m != MATCH_YES) | |
1533 | goto cleanup; | |
1534 | ||
cbb9e6aa | 1535 | var_locus = gfc_current_locus; |
4ee9c684 | 1536 | |
1537 | /* Now we could see the optional array spec. or character length. */ | |
1538 | m = gfc_match_array_spec (&as); | |
b549d2a5 | 1539 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1540 | cp_as = gfc_copy_array_spec (as); | |
1541 | else if (m == MATCH_ERROR) | |
4ee9c684 | 1542 | goto cleanup; |
3b6a4b41 | 1543 | |
4ee9c684 | 1544 | if (m == MATCH_NO) |
1545 | as = gfc_copy_array_spec (current_as); | |
1546 | ||
1547 | char_len = NULL; | |
1548 | cl = NULL; | |
1549 | ||
1550 | if (current_ts.type == BT_CHARACTER) | |
1551 | { | |
1552 | switch (match_char_length (&char_len)) | |
1553 | { | |
1554 | case MATCH_YES: | |
1555 | cl = gfc_get_charlen (); | |
1556 | cl->next = gfc_current_ns->cl_list; | |
1557 | gfc_current_ns->cl_list = cl; | |
1558 | ||
1559 | cl->length = char_len; | |
1560 | break; | |
1561 | ||
3923b69f | 1562 | /* Non-constant lengths need to be copied after the first |
04b61f60 | 1563 | element. Also copy assumed lengths. */ |
4ee9c684 | 1564 | case MATCH_NO: |
04b61f60 | 1565 | if (elem > 1 |
1566 | && (current_ts.cl->length == NULL | |
1567 | || current_ts.cl->length->expr_type != EXPR_CONSTANT)) | |
3923b69f | 1568 | { |
1569 | cl = gfc_get_charlen (); | |
1570 | cl->next = gfc_current_ns->cl_list; | |
1571 | gfc_current_ns->cl_list = cl; | |
1572 | cl->length = gfc_copy_expr (current_ts.cl->length); | |
1573 | } | |
1574 | else | |
1575 | cl = current_ts.cl; | |
1576 | ||
4ee9c684 | 1577 | break; |
1578 | ||
1579 | case MATCH_ERROR: | |
1580 | goto cleanup; | |
1581 | } | |
1582 | } | |
1583 | ||
b549d2a5 | 1584 | /* If this symbol has already shown up in a Cray Pointer declaration, |
f6d0e37a | 1585 | then we want to set the type & bail out. */ |
b549d2a5 | 1586 | if (gfc_option.flag_cray_pointer) |
1587 | { | |
1588 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1589 | if (sym != NULL && sym->attr.cray_pointee) | |
1590 | { | |
1591 | sym->ts.type = current_ts.type; | |
1592 | sym->ts.kind = current_ts.kind; | |
1593 | sym->ts.cl = cl; | |
1594 | sym->ts.derived = current_ts.derived; | |
c5d33754 | 1595 | sym->ts.is_c_interop = current_ts.is_c_interop; |
1596 | sym->ts.is_iso_c = current_ts.is_iso_c; | |
b549d2a5 | 1597 | m = MATCH_YES; |
1598 | ||
1599 | /* Check to see if we have an array specification. */ | |
1600 | if (cp_as != NULL) | |
1601 | { | |
1602 | if (sym->as != NULL) | |
1603 | { | |
7698a624 | 1604 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 1605 | gfc_free_array_spec (cp_as); |
1606 | m = MATCH_ERROR; | |
1607 | goto cleanup; | |
1608 | } | |
1609 | else | |
1610 | { | |
1611 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1612 | gfc_internal_error ("Couldn't set pointee array spec."); | |
e14bee04 | 1613 | |
b549d2a5 | 1614 | /* Fix the array spec. */ |
e14bee04 | 1615 | m = gfc_mod_pointee_as (sym->as); |
b549d2a5 | 1616 | if (m == MATCH_ERROR) |
1617 | goto cleanup; | |
1618 | } | |
e14bee04 | 1619 | } |
b549d2a5 | 1620 | goto cleanup; |
1621 | } | |
1622 | else | |
1623 | { | |
1624 | gfc_free_array_spec (cp_as); | |
1625 | } | |
1626 | } | |
e14bee04 | 1627 | |
1628 | ||
4ee9c684 | 1629 | /* OK, we've successfully matched the declaration. Now put the |
1630 | symbol in the current namespace, because it might be used in the | |
fe06c0d5 | 1631 | optional initialization expression for this symbol, e.g. this is |
4ee9c684 | 1632 | perfectly legal: |
1633 | ||
1634 | integer, parameter :: i = huge(i) | |
1635 | ||
1636 | This is only true for parameters or variables of a basic type. | |
1637 | For components of derived types, it is not true, so we don't | |
1638 | create a symbol for those yet. If we fail to create the symbol, | |
1639 | bail out. */ | |
1640 | if (gfc_current_state () != COMP_DERIVED | |
1641 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1642 | { | |
b8a51d79 | 1643 | m = MATCH_ERROR; |
1644 | goto cleanup; | |
1645 | } | |
1646 | ||
60fbbf9e | 1647 | /* An interface body specifies all of the procedure's |
1648 | characteristics and these shall be consistent with those | |
1649 | specified in the procedure definition, except that the interface | |
1650 | may specify a procedure that is not pure if the procedure is | |
1651 | defined to be pure(12.3.2). */ | |
b8a51d79 | 1652 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1653 | && gfc_current_ns->proc_name |
1654 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
c723595c | 1655 | && current_ts.derived->ns != gfc_current_ns) |
1656 | { | |
1657 | gfc_symtree *st; | |
1658 | st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.derived->name); | |
1659 | if (!(current_ts.derived->attr.imported | |
1660 | && st != NULL | |
1661 | && st->n.sym == current_ts.derived) | |
1662 | && !gfc_current_ns->has_import_set) | |
1663 | { | |
1664 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1665 | "interface", name); | |
1666 | m = MATCH_ERROR; | |
1667 | goto cleanup; | |
1668 | } | |
4ee9c684 | 1669 | } |
1670 | ||
1671 | /* In functions that have a RESULT variable defined, the function | |
1672 | name always refers to function calls. Therefore, the name is | |
1673 | not allowed to appear in specification statements. */ | |
1674 | if (gfc_current_state () == COMP_FUNCTION | |
1675 | && gfc_current_block () != NULL | |
1676 | && gfc_current_block ()->result != NULL | |
1677 | && gfc_current_block ()->result != gfc_current_block () | |
1678 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1679 | { | |
1680 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1681 | m = MATCH_ERROR; | |
1682 | goto cleanup; | |
1683 | } | |
1684 | ||
b4f45d02 | 1685 | /* We allow old-style initializations of the form |
1686 | integer i /2/, j(4) /3*3, 1/ | |
1687 | (if no colon has been seen). These are different from data | |
1688 | statements in that initializers are only allowed to apply to the | |
1689 | variable immediately preceding, i.e. | |
1690 | integer i, j /1, 2/ | |
1691 | is not allowed. Therefore we have to do some work manually, that | |
cca3db55 | 1692 | could otherwise be left to the matchers for DATA statements. */ |
b4f45d02 | 1693 | |
1694 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1695 | { | |
1696 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1697 | "initialization at %C") == FAILURE) | |
1698 | return MATCH_ERROR; | |
e14bee04 | 1699 | |
b4f45d02 | 1700 | return match_old_style_init (name); |
1701 | } | |
1702 | ||
4ee9c684 | 1703 | /* The double colon must be present in order to have initializers. |
1704 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1705 | if (colon_seen) | |
1706 | { | |
1707 | if (gfc_match (" =>") == MATCH_YES) | |
1708 | { | |
4ee9c684 | 1709 | if (!current_attr.pointer) |
1710 | { | |
1711 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1712 | m = MATCH_ERROR; | |
1713 | goto cleanup; | |
1714 | } | |
1715 | ||
1716 | m = gfc_match_null (&initializer); | |
1717 | if (m == MATCH_NO) | |
1718 | { | |
e4789c62 | 1719 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
4ee9c684 | 1720 | m = MATCH_ERROR; |
1721 | } | |
1722 | ||
1723 | if (gfc_pure (NULL)) | |
1724 | { | |
1a9745d2 | 1725 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1726 | "a PURE procedure"); | |
4ee9c684 | 1727 | m = MATCH_ERROR; |
1728 | } | |
1729 | ||
1730 | if (m != MATCH_YES) | |
1731 | goto cleanup; | |
1732 | ||
4ee9c684 | 1733 | } |
1734 | else if (gfc_match_char ('=') == MATCH_YES) | |
1735 | { | |
1736 | if (current_attr.pointer) | |
1737 | { | |
1a9745d2 | 1738 | gfc_error ("Pointer initialization at %C requires '=>', " |
1739 | "not '='"); | |
4ee9c684 | 1740 | m = MATCH_ERROR; |
1741 | goto cleanup; | |
1742 | } | |
1743 | ||
1744 | m = gfc_match_init_expr (&initializer); | |
1745 | if (m == MATCH_NO) | |
1746 | { | |
1747 | gfc_error ("Expected an initialization expression at %C"); | |
1748 | m = MATCH_ERROR; | |
1749 | } | |
1750 | ||
1751 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1752 | { | |
1a9745d2 | 1753 | gfc_error ("Initialization of variable at %C is not allowed in " |
1754 | "a PURE procedure"); | |
4ee9c684 | 1755 | m = MATCH_ERROR; |
1756 | } | |
1757 | ||
1758 | if (m != MATCH_YES) | |
1759 | goto cleanup; | |
1760 | } | |
8ffad0f9 | 1761 | } |
1762 | ||
2294b616 | 1763 | if (initializer != NULL && current_attr.allocatable |
1764 | && gfc_current_state () == COMP_DERIVED) | |
1765 | { | |
1a9745d2 | 1766 | gfc_error ("Initialization of allocatable component at %C is not " |
1767 | "allowed"); | |
2294b616 | 1768 | m = MATCH_ERROR; |
1769 | goto cleanup; | |
1770 | } | |
1771 | ||
d9b3f26b | 1772 | /* Add the initializer. Note that it is fine if initializer is |
4ee9c684 | 1773 | NULL here, because we sometimes also need to check if a |
1774 | declaration *must* have an initialization expression. */ | |
1775 | if (gfc_current_state () != COMP_DERIVED) | |
1776 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1777 | else | |
d9b3f26b | 1778 | { |
2294b616 | 1779 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1780 | && !current_attr.pointer && !initializer) |
d9b3f26b | 1781 | initializer = gfc_default_initializer (¤t_ts); |
1782 | t = build_struct (name, cl, &initializer, &as); | |
1783 | } | |
4ee9c684 | 1784 | |
1785 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1786 | ||
1787 | cleanup: | |
1788 | /* Free stuff up and return. */ | |
1789 | gfc_free_expr (initializer); | |
1790 | gfc_free_array_spec (as); | |
1791 | ||
1792 | return m; | |
1793 | } | |
1794 | ||
1795 | ||
d10f89ee | 1796 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
1797 | This assumes that the byte size is equal to the kind number for | |
1798 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
4ee9c684 | 1799 | |
1800 | match | |
1a9745d2 | 1801 | gfc_match_old_kind_spec (gfc_typespec *ts) |
4ee9c684 | 1802 | { |
1803 | match m; | |
3bd3b616 | 1804 | int original_kind; |
4ee9c684 | 1805 | |
1806 | if (gfc_match_char ('*') != MATCH_YES) | |
1807 | return MATCH_NO; | |
1808 | ||
3bd3b616 | 1809 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
4ee9c684 | 1810 | if (m != MATCH_YES) |
1811 | return MATCH_ERROR; | |
1812 | ||
b118a35b | 1813 | original_kind = ts->kind; |
1814 | ||
4ee9c684 | 1815 | /* Massage the kind numbers for complex types. */ |
b118a35b | 1816 | if (ts->type == BT_COMPLEX) |
1817 | { | |
1818 | if (ts->kind % 2) | |
1a9745d2 | 1819 | { |
1820 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1821 | gfc_basic_typename (ts->type), original_kind); | |
1822 | return MATCH_ERROR; | |
1823 | } | |
b118a35b | 1824 | ts->kind /= 2; |
1825 | } | |
4ee9c684 | 1826 | |
f2d4ef3b | 1827 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1828 | { |
b118a35b | 1829 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
1a9745d2 | 1830 | gfc_basic_typename (ts->type), original_kind); |
4ee9c684 | 1831 | return MATCH_ERROR; |
1832 | } | |
1833 | ||
be7f01a1 | 1834 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
1835 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1836 | return MATCH_ERROR; | |
1837 | ||
4ee9c684 | 1838 | return MATCH_YES; |
1839 | } | |
1840 | ||
1841 | ||
1842 | /* Match a kind specification. Since kinds are generally optional, we | |
1843 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1844 | string is found, then we know we have an error. */ | |
1845 | ||
1846 | match | |
67a51c8e | 1847 | gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only) |
4ee9c684 | 1848 | { |
67a51c8e | 1849 | locus where, loc; |
4ee9c684 | 1850 | gfc_expr *e; |
1851 | match m, n; | |
c632ff3d | 1852 | char c; |
4ee9c684 | 1853 | const char *msg; |
1854 | ||
1855 | m = MATCH_NO; | |
67a51c8e | 1856 | n = MATCH_YES; |
4ee9c684 | 1857 | e = NULL; |
1858 | ||
67a51c8e | 1859 | where = loc = gfc_current_locus; |
1860 | ||
1861 | if (kind_expr_only) | |
1862 | goto kind_expr; | |
4ee9c684 | 1863 | |
1864 | if (gfc_match_char ('(') == MATCH_NO) | |
1865 | return MATCH_NO; | |
1866 | ||
1867 | /* Also gobbles optional text. */ | |
1868 | if (gfc_match (" kind = ") == MATCH_YES) | |
1869 | m = MATCH_ERROR; | |
1870 | ||
67a51c8e | 1871 | loc = gfc_current_locus; |
1872 | ||
1873 | kind_expr: | |
4ee9c684 | 1874 | n = gfc_match_init_expr (&e); |
67a51c8e | 1875 | |
4ee9c684 | 1876 | if (n != MATCH_YES) |
67a51c8e | 1877 | { |
077932f9 | 1878 | if (gfc_matching_function) |
67a51c8e | 1879 | { |
077932f9 | 1880 | /* The function kind expression might include use associated or |
1881 | imported parameters and try again after the specification | |
1882 | expressions..... */ | |
67a51c8e | 1883 | if (gfc_match_char (')') != MATCH_YES) |
1884 | { | |
1885 | gfc_error ("Missing right parenthesis at %C"); | |
1886 | m = MATCH_ERROR; | |
1887 | goto no_match; | |
1888 | } | |
1889 | ||
1890 | gfc_free_expr (e); | |
67a51c8e | 1891 | gfc_undo_symbols (); |
1892 | return MATCH_YES; | |
1893 | } | |
1894 | else | |
1895 | { | |
1896 | /* ....or else, the match is real. */ | |
1897 | if (n == MATCH_NO) | |
1898 | gfc_error ("Expected initialization expression at %C"); | |
1899 | if (n != MATCH_YES) | |
1900 | return MATCH_ERROR; | |
1901 | } | |
1902 | } | |
4ee9c684 | 1903 | |
1904 | if (e->rank != 0) | |
1905 | { | |
1906 | gfc_error ("Expected scalar initialization expression at %C"); | |
1907 | m = MATCH_ERROR; | |
1908 | goto no_match; | |
1909 | } | |
1910 | ||
1911 | msg = gfc_extract_int (e, &ts->kind); | |
077932f9 | 1912 | |
4ee9c684 | 1913 | if (msg != NULL) |
1914 | { | |
1915 | gfc_error (msg); | |
1916 | m = MATCH_ERROR; | |
1917 | goto no_match; | |
1918 | } | |
1919 | ||
c5d33754 | 1920 | /* Before throwing away the expression, let's see if we had a |
1921 | C interoperable kind (and store the fact). */ | |
1922 | if (e->ts.is_c_interop == 1) | |
1923 | { | |
1924 | /* Mark this as c interoperable if being declared with one | |
1925 | of the named constants from iso_c_binding. */ | |
1926 | ts->is_c_interop = e->ts.is_iso_c; | |
1927 | ts->f90_type = e->ts.f90_type; | |
1928 | } | |
1929 | ||
4ee9c684 | 1930 | gfc_free_expr (e); |
1931 | e = NULL; | |
1932 | ||
c5d33754 | 1933 | /* Ignore errors to this point, if we've gotten here. This means |
1934 | we ignore the m=MATCH_ERROR from above. */ | |
f2d4ef3b | 1935 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1936 | { |
1937 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
1938 | gfc_basic_typename (ts->type)); | |
c632ff3d | 1939 | gfc_current_locus = where; |
1940 | return MATCH_ERROR; | |
4ee9c684 | 1941 | } |
c632ff3d | 1942 | |
1943 | gfc_gobble_whitespace (); | |
e0be6f02 | 1944 | if ((c = gfc_next_ascii_char ()) != ')' |
1945 | && (ts->type != BT_CHARACTER || c != ',')) | |
4ee9c684 | 1946 | { |
c632ff3d | 1947 | if (ts->type == BT_CHARACTER) |
1948 | gfc_error ("Missing right parenthesis or comma at %C"); | |
1949 | else | |
1950 | gfc_error ("Missing right parenthesis at %C"); | |
67a51c8e | 1951 | m = MATCH_ERROR; |
4ee9c684 | 1952 | } |
c5d33754 | 1953 | else |
1954 | /* All tests passed. */ | |
1955 | m = MATCH_YES; | |
4ee9c684 | 1956 | |
c5d33754 | 1957 | if(m == MATCH_ERROR) |
1958 | gfc_current_locus = where; | |
1959 | ||
1960 | /* Return what we know from the test(s). */ | |
1961 | return m; | |
4ee9c684 | 1962 | |
1963 | no_match: | |
1964 | gfc_free_expr (e); | |
cbb9e6aa | 1965 | gfc_current_locus = where; |
4ee9c684 | 1966 | return m; |
1967 | } | |
1968 | ||
1969 | ||
33399208 | 1970 | static match |
1971 | match_char_kind (int * kind, int * is_iso_c) | |
1972 | { | |
1973 | locus where; | |
1974 | gfc_expr *e; | |
1975 | match m, n; | |
1976 | const char *msg; | |
1977 | ||
1978 | m = MATCH_NO; | |
1979 | e = NULL; | |
1980 | where = gfc_current_locus; | |
1981 | ||
1982 | n = gfc_match_init_expr (&e); | |
c632ff3d | 1983 | |
077932f9 | 1984 | if (n != MATCH_YES && gfc_matching_function) |
c632ff3d | 1985 | { |
077932f9 | 1986 | /* The expression might include use-associated or imported |
1987 | parameters and try again after the specification | |
1988 | expressions. */ | |
c632ff3d | 1989 | gfc_free_expr (e); |
c632ff3d | 1990 | gfc_undo_symbols (); |
1991 | return MATCH_YES; | |
1992 | } | |
1993 | ||
33399208 | 1994 | if (n == MATCH_NO) |
1995 | gfc_error ("Expected initialization expression at %C"); | |
1996 | if (n != MATCH_YES) | |
1997 | return MATCH_ERROR; | |
1998 | ||
1999 | if (e->rank != 0) | |
2000 | { | |
2001 | gfc_error ("Expected scalar initialization expression at %C"); | |
2002 | m = MATCH_ERROR; | |
2003 | goto no_match; | |
2004 | } | |
2005 | ||
2006 | msg = gfc_extract_int (e, kind); | |
2007 | *is_iso_c = e->ts.is_iso_c; | |
2008 | if (msg != NULL) | |
2009 | { | |
2010 | gfc_error (msg); | |
2011 | m = MATCH_ERROR; | |
2012 | goto no_match; | |
2013 | } | |
2014 | ||
2015 | gfc_free_expr (e); | |
2016 | ||
2017 | /* Ignore errors to this point, if we've gotten here. This means | |
2018 | we ignore the m=MATCH_ERROR from above. */ | |
2019 | if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0) | |
2020 | { | |
2021 | gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind); | |
2022 | m = MATCH_ERROR; | |
2023 | } | |
2024 | else | |
2025 | /* All tests passed. */ | |
2026 | m = MATCH_YES; | |
2027 | ||
2028 | if (m == MATCH_ERROR) | |
2029 | gfc_current_locus = where; | |
2030 | ||
2031 | /* Return what we know from the test(s). */ | |
2032 | return m; | |
2033 | ||
2034 | no_match: | |
2035 | gfc_free_expr (e); | |
2036 | gfc_current_locus = where; | |
2037 | return m; | |
2038 | } | |
2039 | ||
4ee9c684 | 2040 | /* Match the various kind/length specifications in a CHARACTER |
2041 | declaration. We don't return MATCH_NO. */ | |
2042 | ||
2043 | static match | |
1a9745d2 | 2044 | match_char_spec (gfc_typespec *ts) |
4ee9c684 | 2045 | { |
33399208 | 2046 | int kind, seen_length, is_iso_c; |
4ee9c684 | 2047 | gfc_charlen *cl; |
2048 | gfc_expr *len; | |
2049 | match m; | |
33399208 | 2050 | |
4ee9c684 | 2051 | len = NULL; |
2052 | seen_length = 0; | |
33399208 | 2053 | kind = 0; |
2054 | is_iso_c = 0; | |
4ee9c684 | 2055 | |
2056 | /* Try the old-style specification first. */ | |
2057 | old_char_selector = 0; | |
2058 | ||
2059 | m = match_char_length (&len); | |
2060 | if (m != MATCH_NO) | |
2061 | { | |
2062 | if (m == MATCH_YES) | |
2063 | old_char_selector = 1; | |
2064 | seen_length = 1; | |
2065 | goto done; | |
2066 | } | |
2067 | ||
2068 | m = gfc_match_char ('('); | |
2069 | if (m != MATCH_YES) | |
2070 | { | |
c5d33754 | 2071 | m = MATCH_YES; /* Character without length is a single char. */ |
4ee9c684 | 2072 | goto done; |
2073 | } | |
2074 | ||
c5d33754 | 2075 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ |
4ee9c684 | 2076 | if (gfc_match (" kind =") == MATCH_YES) |
2077 | { | |
33399208 | 2078 | m = match_char_kind (&kind, &is_iso_c); |
c5d33754 | 2079 | |
4ee9c684 | 2080 | if (m == MATCH_ERROR) |
2081 | goto done; | |
2082 | if (m == MATCH_NO) | |
2083 | goto syntax; | |
2084 | ||
2085 | if (gfc_match (" , len =") == MATCH_NO) | |
2086 | goto rparen; | |
2087 | ||
2088 | m = char_len_param_value (&len); | |
2089 | if (m == MATCH_NO) | |
2090 | goto syntax; | |
2091 | if (m == MATCH_ERROR) | |
2092 | goto done; | |
2093 | seen_length = 1; | |
2094 | ||
2095 | goto rparen; | |
2096 | } | |
2097 | ||
f6d0e37a | 2098 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ |
4ee9c684 | 2099 | if (gfc_match (" len =") == MATCH_YES) |
2100 | { | |
2101 | m = char_len_param_value (&len); | |
2102 | if (m == MATCH_NO) | |
2103 | goto syntax; | |
2104 | if (m == MATCH_ERROR) | |
2105 | goto done; | |
2106 | seen_length = 1; | |
2107 | ||
2108 | if (gfc_match_char (')') == MATCH_YES) | |
2109 | goto done; | |
2110 | ||
2111 | if (gfc_match (" , kind =") != MATCH_YES) | |
2112 | goto syntax; | |
2113 | ||
33399208 | 2114 | if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR) |
2115 | goto done; | |
4ee9c684 | 2116 | |
2117 | goto rparen; | |
2118 | } | |
2119 | ||
f6d0e37a | 2120 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
4ee9c684 | 2121 | m = char_len_param_value (&len); |
2122 | if (m == MATCH_NO) | |
2123 | goto syntax; | |
2124 | if (m == MATCH_ERROR) | |
2125 | goto done; | |
2126 | seen_length = 1; | |
2127 | ||
2128 | m = gfc_match_char (')'); | |
2129 | if (m == MATCH_YES) | |
2130 | goto done; | |
2131 | ||
2132 | if (gfc_match_char (',') != MATCH_YES) | |
2133 | goto syntax; | |
2134 | ||
c5d33754 | 2135 | gfc_match (" kind ="); /* Gobble optional text. */ |
4ee9c684 | 2136 | |
33399208 | 2137 | m = match_char_kind (&kind, &is_iso_c); |
4ee9c684 | 2138 | if (m == MATCH_ERROR) |
2139 | goto done; | |
2140 | if (m == MATCH_NO) | |
2141 | goto syntax; | |
2142 | ||
2143 | rparen: | |
2144 | /* Require a right-paren at this point. */ | |
2145 | m = gfc_match_char (')'); | |
2146 | if (m == MATCH_YES) | |
2147 | goto done; | |
2148 | ||
2149 | syntax: | |
2150 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
2151 | m = MATCH_ERROR; | |
a3cbe8cc | 2152 | gfc_free_expr (len); |
2153 | return m; | |
4ee9c684 | 2154 | |
2155 | done: | |
8d39570e | 2156 | /* Deal with character functions after USE and IMPORT statements. */ |
2157 | if (gfc_matching_function) | |
077932f9 | 2158 | { |
8d39570e | 2159 | gfc_free_expr (len); |
077932f9 | 2160 | gfc_undo_symbols (); |
2161 | return MATCH_YES; | |
2162 | } | |
2163 | ||
4ee9c684 | 2164 | if (m != MATCH_YES) |
2165 | { | |
2166 | gfc_free_expr (len); | |
2167 | return m; | |
2168 | } | |
2169 | ||
2170 | /* Do some final massaging of the length values. */ | |
2171 | cl = gfc_get_charlen (); | |
2172 | cl->next = gfc_current_ns->cl_list; | |
2173 | gfc_current_ns->cl_list = cl; | |
2174 | ||
2175 | if (seen_length == 0) | |
2176 | cl->length = gfc_int_expr (1); | |
2177 | else | |
2fe2caa6 | 2178 | cl->length = len; |
4ee9c684 | 2179 | |
2180 | ts->cl = cl; | |
33399208 | 2181 | ts->kind = kind == 0 ? gfc_default_character_kind : kind; |
4ee9c684 | 2182 | |
c5d33754 | 2183 | /* We have to know if it was a c interoperable kind so we can |
2184 | do accurate type checking of bind(c) procs, etc. */ | |
33399208 | 2185 | if (kind != 0) |
2186 | /* Mark this as c interoperable if being declared with one | |
2187 | of the named constants from iso_c_binding. */ | |
2188 | ts->is_c_interop = is_iso_c; | |
c5d33754 | 2189 | else if (len != NULL) |
33399208 | 2190 | /* Here, we might have parsed something such as: character(c_char) |
2191 | In this case, the parsing code above grabs the c_char when | |
2192 | looking for the length (line 1690, roughly). it's the last | |
2193 | testcase for parsing the kind params of a character variable. | |
2194 | However, it's not actually the length. this seems like it | |
2195 | could be an error. | |
2196 | To see if the user used a C interop kind, test the expr | |
2197 | of the so called length, and see if it's C interoperable. */ | |
2198 | ts->is_c_interop = len->ts.is_iso_c; | |
c5d33754 | 2199 | |
4ee9c684 | 2200 | return MATCH_YES; |
2201 | } | |
2202 | ||
2203 | ||
2204 | /* Matches a type specification. If successful, sets the ts structure | |
2205 | to the matched specification. This is necessary for FUNCTION and | |
2206 | IMPLICIT statements. | |
2207 | ||
e14bee04 | 2208 | If implicit_flag is nonzero, then we don't check for the optional |
39351103 | 2209 | kind specification. Not doing so is needed for matching an IMPLICIT |
4ee9c684 | 2210 | statement correctly. */ |
2211 | ||
67a51c8e | 2212 | match |
2213 | gfc_match_type_spec (gfc_typespec *ts, int implicit_flag) | |
4ee9c684 | 2214 | { |
2215 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2216 | gfc_symbol *sym; | |
2217 | match m; | |
e0be6f02 | 2218 | char c; |
077932f9 | 2219 | bool seen_deferred_kind; |
4ee9c684 | 2220 | |
077932f9 | 2221 | /* A belt and braces check that the typespec is correctly being treated |
2222 | as a deferred characteristic association. */ | |
2223 | seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION) | |
8d39570e | 2224 | && (gfc_current_block ()->result->ts.kind == -1) |
2225 | && (ts->kind == -1); | |
4ee9c684 | 2226 | gfc_clear_ts (ts); |
077932f9 | 2227 | if (seen_deferred_kind) |
2228 | ts->kind = -1; | |
4ee9c684 | 2229 | |
c5d33754 | 2230 | /* Clear the current binding label, in case one is given. */ |
2231 | curr_binding_label[0] = '\0'; | |
2232 | ||
25b29122 | 2233 | if (gfc_match (" byte") == MATCH_YES) |
2234 | { | |
e14bee04 | 2235 | if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C") |
25b29122 | 2236 | == FAILURE) |
2237 | return MATCH_ERROR; | |
2238 | ||
2239 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
2240 | { | |
2241 | gfc_error ("BYTE type used at %C " | |
2242 | "is not available on the target machine"); | |
2243 | return MATCH_ERROR; | |
2244 | } | |
e14bee04 | 2245 | |
25b29122 | 2246 | ts->type = BT_INTEGER; |
2247 | ts->kind = 1; | |
2248 | return MATCH_YES; | |
2249 | } | |
2250 | ||
4ee9c684 | 2251 | if (gfc_match (" integer") == MATCH_YES) |
2252 | { | |
2253 | ts->type = BT_INTEGER; | |
b8a891cb | 2254 | ts->kind = gfc_default_integer_kind; |
4ee9c684 | 2255 | goto get_kind; |
2256 | } | |
2257 | ||
2258 | if (gfc_match (" character") == MATCH_YES) | |
2259 | { | |
2260 | ts->type = BT_CHARACTER; | |
39351103 | 2261 | if (implicit_flag == 0) |
2262 | return match_char_spec (ts); | |
2263 | else | |
2264 | return MATCH_YES; | |
4ee9c684 | 2265 | } |
2266 | ||
2267 | if (gfc_match (" real") == MATCH_YES) | |
2268 | { | |
2269 | ts->type = BT_REAL; | |
b8a891cb | 2270 | ts->kind = gfc_default_real_kind; |
4ee9c684 | 2271 | goto get_kind; |
2272 | } | |
2273 | ||
2274 | if (gfc_match (" double precision") == MATCH_YES) | |
2275 | { | |
2276 | ts->type = BT_REAL; | |
b8a891cb | 2277 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2278 | return MATCH_YES; |
2279 | } | |
2280 | ||
2281 | if (gfc_match (" complex") == MATCH_YES) | |
2282 | { | |
2283 | ts->type = BT_COMPLEX; | |
b8a891cb | 2284 | ts->kind = gfc_default_complex_kind; |
4ee9c684 | 2285 | goto get_kind; |
2286 | } | |
2287 | ||
2288 | if (gfc_match (" double complex") == MATCH_YES) | |
2289 | { | |
be7f01a1 | 2290 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
2291 | "conform to the Fortran 95 standard") == FAILURE) | |
2292 | return MATCH_ERROR; | |
2293 | ||
4ee9c684 | 2294 | ts->type = BT_COMPLEX; |
b8a891cb | 2295 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2296 | return MATCH_YES; |
2297 | } | |
2298 | ||
2299 | if (gfc_match (" logical") == MATCH_YES) | |
2300 | { | |
2301 | ts->type = BT_LOGICAL; | |
b8a891cb | 2302 | ts->kind = gfc_default_logical_kind; |
4ee9c684 | 2303 | goto get_kind; |
2304 | } | |
2305 | ||
2306 | m = gfc_match (" type ( %n )", name); | |
2307 | if (m != MATCH_YES) | |
2308 | return m; | |
2309 | ||
077932f9 | 2310 | ts->type = BT_DERIVED; |
2311 | ||
2312 | /* Defer association of the derived type until the end of the | |
2313 | specification block. However, if the derived type can be | |
2314 | found, add it to the typespec. */ | |
2315 | if (gfc_matching_function) | |
67a51c8e | 2316 | { |
077932f9 | 2317 | ts->derived = NULL; |
2318 | if (gfc_current_state () != COMP_INTERFACE | |
2319 | && !gfc_find_symbol (name, NULL, 1, &sym) && sym) | |
2320 | ts->derived = sym; | |
67a51c8e | 2321 | return MATCH_YES; |
2322 | } | |
2323 | ||
2324 | /* Search for the name but allow the components to be defined later. If | |
2325 | type = -1, this typespec has been seen in a function declaration but | |
077932f9 | 2326 | the type could not be accessed at that point. */ |
2327 | sym = NULL; | |
67a51c8e | 2328 | if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym)) |
4ee9c684 | 2329 | { |
2330 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2331 | return MATCH_ERROR; | |
2332 | } | |
67a51c8e | 2333 | else if (ts->kind == -1) |
2334 | { | |
077932f9 | 2335 | int iface = gfc_state_stack->previous->state != COMP_INTERFACE |
2336 | || gfc_current_ns->has_import_set; | |
2337 | if (gfc_find_symbol (name, NULL, iface, &sym)) | |
67a51c8e | 2338 | { |
2339 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2340 | return MATCH_ERROR; | |
2341 | } | |
2342 | ||
077932f9 | 2343 | ts->kind = 0; |
67a51c8e | 2344 | if (sym == NULL) |
2345 | return MATCH_NO; | |
2346 | } | |
4ee9c684 | 2347 | |
2348 | if (sym->attr.flavor != FL_DERIVED | |
950683ed | 2349 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 2350 | return MATCH_ERROR; |
2351 | ||
077932f9 | 2352 | gfc_set_sym_referenced (sym); |
4ee9c684 | 2353 | ts->derived = sym; |
2354 | ||
2355 | return MATCH_YES; | |
2356 | ||
2357 | get_kind: | |
2358 | /* For all types except double, derived and character, look for an | |
2359 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
39351103 | 2360 | if (implicit_flag == 1) |
4ee9c684 | 2361 | return MATCH_YES; |
2362 | ||
18f3698a | 2363 | if (gfc_current_form == FORM_FREE) |
2364 | { | |
e0be6f02 | 2365 | c = gfc_peek_ascii_char(); |
18f3698a | 2366 | if (!gfc_is_whitespace(c) && c != '*' && c != '(' |
1a9745d2 | 2367 | && c != ':' && c != ',') |
18f3698a | 2368 | return MATCH_NO; |
2369 | } | |
2370 | ||
67a51c8e | 2371 | m = gfc_match_kind_spec (ts, false); |
4ee9c684 | 2372 | if (m == MATCH_NO && ts->type != BT_CHARACTER) |
2373 | m = gfc_match_old_kind_spec (ts); | |
2374 | ||
077932f9 | 2375 | /* Defer association of the KIND expression of function results |
2376 | until after USE and IMPORT statements. */ | |
2377 | if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ()) | |
2378 | || gfc_matching_function) | |
2379 | return MATCH_YES; | |
2380 | ||
4ee9c684 | 2381 | if (m == MATCH_NO) |
2382 | m = MATCH_YES; /* No kind specifier found. */ | |
2383 | ||
2384 | return m; | |
2385 | } | |
2386 | ||
2387 | ||
39351103 | 2388 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
2389 | already matched in parse.c, or we would not end up here in the | |
2390 | first place. So the only thing we need to check, is if there is | |
2391 | trailing garbage. If not, the match is successful. */ | |
2392 | ||
2393 | match | |
2394 | gfc_match_implicit_none (void) | |
2395 | { | |
39351103 | 2396 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
2397 | } | |
2398 | ||
2399 | ||
2400 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
2401 | ||
2402 | static match | |
b70528c7 | 2403 | match_implicit_range (void) |
39351103 | 2404 | { |
e0be6f02 | 2405 | char c, c1, c2; |
2406 | int inner; | |
39351103 | 2407 | locus cur_loc; |
2408 | ||
2409 | cur_loc = gfc_current_locus; | |
2410 | ||
2411 | gfc_gobble_whitespace (); | |
e0be6f02 | 2412 | c = gfc_next_ascii_char (); |
39351103 | 2413 | if (c != '(') |
2414 | { | |
2415 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
2416 | goto bad; | |
2417 | } | |
2418 | ||
2419 | inner = 1; | |
2420 | while (inner) | |
2421 | { | |
2422 | gfc_gobble_whitespace (); | |
e0be6f02 | 2423 | c1 = gfc_next_ascii_char (); |
39351103 | 2424 | if (!ISALPHA (c1)) |
2425 | goto bad; | |
2426 | ||
2427 | gfc_gobble_whitespace (); | |
e0be6f02 | 2428 | c = gfc_next_ascii_char (); |
39351103 | 2429 | |
2430 | switch (c) | |
2431 | { | |
2432 | case ')': | |
f6d0e37a | 2433 | inner = 0; /* Fall through. */ |
39351103 | 2434 | |
2435 | case ',': | |
2436 | c2 = c1; | |
2437 | break; | |
2438 | ||
2439 | case '-': | |
2440 | gfc_gobble_whitespace (); | |
e0be6f02 | 2441 | c2 = gfc_next_ascii_char (); |
39351103 | 2442 | if (!ISALPHA (c2)) |
2443 | goto bad; | |
2444 | ||
2445 | gfc_gobble_whitespace (); | |
e0be6f02 | 2446 | c = gfc_next_ascii_char (); |
39351103 | 2447 | |
2448 | if ((c != ',') && (c != ')')) | |
2449 | goto bad; | |
2450 | if (c == ')') | |
2451 | inner = 0; | |
2452 | ||
2453 | break; | |
2454 | ||
2455 | default: | |
2456 | goto bad; | |
2457 | } | |
2458 | ||
2459 | if (c1 > c2) | |
2460 | { | |
2461 | gfc_error ("Letters must be in alphabetic order in " | |
2462 | "IMPLICIT statement at %C"); | |
2463 | goto bad; | |
2464 | } | |
2465 | ||
2466 | /* See if we can add the newly matched range to the pending | |
1a9745d2 | 2467 | implicits from this IMPLICIT statement. We do not check for |
2468 | conflicts with whatever earlier IMPLICIT statements may have | |
2469 | set. This is done when we've successfully finished matching | |
2470 | the current one. */ | |
b70528c7 | 2471 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
39351103 | 2472 | goto bad; |
2473 | } | |
2474 | ||
2475 | return MATCH_YES; | |
2476 | ||
2477 | bad: | |
2478 | gfc_syntax_error (ST_IMPLICIT); | |
2479 | ||
2480 | gfc_current_locus = cur_loc; | |
2481 | return MATCH_ERROR; | |
2482 | } | |
2483 | ||
2484 | ||
2485 | /* Match an IMPLICIT statement, storing the types for | |
2486 | gfc_set_implicit() if the statement is accepted by the parser. | |
2487 | There is a strange looking, but legal syntactic construction | |
2488 | possible. It looks like: | |
2489 | ||
2490 | IMPLICIT INTEGER (a-b) (c-d) | |
2491 | ||
2492 | This is legal if "a-b" is a constant expression that happens to | |
2493 | equal one of the legal kinds for integers. The real problem | |
2494 | happens with an implicit specification that looks like: | |
2495 | ||
2496 | IMPLICIT INTEGER (a-b) | |
2497 | ||
2498 | In this case, a typespec matcher that is "greedy" (as most of the | |
2499 | matchers are) gobbles the character range as a kindspec, leaving | |
2500 | nothing left. We therefore have to go a bit more slowly in the | |
2501 | matching process by inhibiting the kindspec checking during | |
2502 | typespec matching and checking for a kind later. */ | |
2503 | ||
2504 | match | |
2505 | gfc_match_implicit (void) | |
2506 | { | |
2507 | gfc_typespec ts; | |
2508 | locus cur_loc; | |
e0be6f02 | 2509 | char c; |
39351103 | 2510 | match m; |
2511 | ||
52179f31 | 2512 | gfc_clear_ts (&ts); |
2513 | ||
39351103 | 2514 | /* We don't allow empty implicit statements. */ |
2515 | if (gfc_match_eos () == MATCH_YES) | |
2516 | { | |
2517 | gfc_error ("Empty IMPLICIT statement at %C"); | |
2518 | return MATCH_ERROR; | |
2519 | } | |
2520 | ||
39351103 | 2521 | do |
2522 | { | |
b70528c7 | 2523 | /* First cleanup. */ |
2524 | gfc_clear_new_implicit (); | |
2525 | ||
39351103 | 2526 | /* A basic type is mandatory here. */ |
67a51c8e | 2527 | m = gfc_match_type_spec (&ts, 1); |
39351103 | 2528 | if (m == MATCH_ERROR) |
2529 | goto error; | |
2530 | if (m == MATCH_NO) | |
2531 | goto syntax; | |
2532 | ||
2533 | cur_loc = gfc_current_locus; | |
b70528c7 | 2534 | m = match_implicit_range (); |
39351103 | 2535 | |
2536 | if (m == MATCH_YES) | |
2537 | { | |
b70528c7 | 2538 | /* We may have <TYPE> (<RANGE>). */ |
39351103 | 2539 | gfc_gobble_whitespace (); |
e0be6f02 | 2540 | c = gfc_next_ascii_char (); |
39351103 | 2541 | if ((c == '\n') || (c == ',')) |
b70528c7 | 2542 | { |
2543 | /* Check for CHARACTER with no length parameter. */ | |
2544 | if (ts.type == BT_CHARACTER && !ts.cl) | |
2545 | { | |
b8a891cb | 2546 | ts.kind = gfc_default_character_kind; |
b70528c7 | 2547 | ts.cl = gfc_get_charlen (); |
2548 | ts.cl->next = gfc_current_ns->cl_list; | |
2549 | gfc_current_ns->cl_list = ts.cl; | |
2550 | ts.cl->length = gfc_int_expr (1); | |
2551 | } | |
2552 | ||
2553 | /* Record the Successful match. */ | |
2554 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2555 | return MATCH_ERROR; | |
2556 | continue; | |
2557 | } | |
39351103 | 2558 | |
2559 | gfc_current_locus = cur_loc; | |
2560 | } | |
2561 | ||
b70528c7 | 2562 | /* Discard the (incorrectly) matched range. */ |
2563 | gfc_clear_new_implicit (); | |
2564 | ||
2565 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
2566 | if (ts.type == BT_CHARACTER) | |
2567 | m = match_char_spec (&ts); | |
2568 | else | |
39351103 | 2569 | { |
67a51c8e | 2570 | m = gfc_match_kind_spec (&ts, false); |
39351103 | 2571 | if (m == MATCH_NO) |
b70528c7 | 2572 | { |
2573 | m = gfc_match_old_kind_spec (&ts); | |
2574 | if (m == MATCH_ERROR) | |
2575 | goto error; | |
2576 | if (m == MATCH_NO) | |
2577 | goto syntax; | |
2578 | } | |
39351103 | 2579 | } |
b70528c7 | 2580 | if (m == MATCH_ERROR) |
2581 | goto error; | |
39351103 | 2582 | |
b70528c7 | 2583 | m = match_implicit_range (); |
39351103 | 2584 | if (m == MATCH_ERROR) |
2585 | goto error; | |
2586 | if (m == MATCH_NO) | |
2587 | goto syntax; | |
2588 | ||
2589 | gfc_gobble_whitespace (); | |
e0be6f02 | 2590 | c = gfc_next_ascii_char (); |
39351103 | 2591 | if ((c != '\n') && (c != ',')) |
2592 | goto syntax; | |
2593 | ||
b70528c7 | 2594 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2595 | return MATCH_ERROR; | |
39351103 | 2596 | } |
2597 | while (c == ','); | |
2598 | ||
b70528c7 | 2599 | return MATCH_YES; |
39351103 | 2600 | |
2601 | syntax: | |
2602 | gfc_syntax_error (ST_IMPLICIT); | |
2603 | ||
2604 | error: | |
2605 | return MATCH_ERROR; | |
2606 | } | |
2607 | ||
f6d0e37a | 2608 | |
d67fc9ae | 2609 | match |
2610 | gfc_match_import (void) | |
2611 | { | |
2612 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2613 | match m; | |
2614 | gfc_symbol *sym; | |
2615 | gfc_symtree *st; | |
2616 | ||
f6d0e37a | 2617 | if (gfc_current_ns->proc_name == NULL |
2618 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
d67fc9ae | 2619 | { |
2620 | gfc_error ("IMPORT statement at %C only permitted in " | |
2621 | "an INTERFACE body"); | |
2622 | return MATCH_ERROR; | |
2623 | } | |
2624 | ||
1a9745d2 | 2625 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
d67fc9ae | 2626 | == FAILURE) |
2627 | return MATCH_ERROR; | |
2628 | ||
2629 | if (gfc_match_eos () == MATCH_YES) | |
2630 | { | |
2631 | /* All host variables should be imported. */ | |
2632 | gfc_current_ns->has_import_set = 1; | |
2633 | return MATCH_YES; | |
2634 | } | |
2635 | ||
2636 | if (gfc_match (" ::") == MATCH_YES) | |
2637 | { | |
2638 | if (gfc_match_eos () == MATCH_YES) | |
1a9745d2 | 2639 | { |
2640 | gfc_error ("Expecting list of named entities at %C"); | |
2641 | return MATCH_ERROR; | |
2642 | } | |
d67fc9ae | 2643 | } |
2644 | ||
2645 | for(;;) | |
2646 | { | |
2647 | m = gfc_match (" %n", name); | |
2648 | switch (m) | |
2649 | { | |
2650 | case MATCH_YES: | |
096d4ad9 | 2651 | if (gfc_current_ns->parent != NULL |
f6d0e37a | 2652 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
096d4ad9 | 2653 | { |
2654 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2655 | return MATCH_ERROR; | |
2656 | } | |
2657 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
f6d0e37a | 2658 | && gfc_find_symbol (name, |
2659 | gfc_current_ns->proc_name->ns->parent, | |
2660 | 1, &sym)) | |
1a9745d2 | 2661 | { |
2662 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2663 | return MATCH_ERROR; | |
2664 | } | |
2665 | ||
2666 | if (sym == NULL) | |
2667 | { | |
2668 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2669 | "at %C - does not exist.", name); | |
2670 | return MATCH_ERROR; | |
2671 | } | |
2672 | ||
e14bee04 | 2673 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) |
1a9745d2 | 2674 | { |
2675 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2676 | "at %C.", name); | |
2677 | goto next_item; | |
2678 | } | |
2679 | ||
2680 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
2681 | st->n.sym = sym; | |
2682 | sym->refs++; | |
c723595c | 2683 | sym->attr.imported = 1; |
d67fc9ae | 2684 | |
2685 | goto next_item; | |
2686 | ||
2687 | case MATCH_NO: | |
2688 | break; | |
2689 | ||
2690 | case MATCH_ERROR: | |
2691 | return MATCH_ERROR; | |
2692 | } | |
2693 | ||
2694 | next_item: | |
2695 | if (gfc_match_eos () == MATCH_YES) | |
2696 | break; | |
2697 | if (gfc_match_char (',') != MATCH_YES) | |
2698 | goto syntax; | |
2699 | } | |
2700 | ||
2701 | return MATCH_YES; | |
2702 | ||
2703 | syntax: | |
2704 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2705 | return MATCH_ERROR; | |
2706 | } | |
39351103 | 2707 | |
f6d0e37a | 2708 | |
c72e5f7e | 2709 | /* A minimal implementation of gfc_match without whitespace, escape |
2710 | characters or variable arguments. Returns true if the next | |
2711 | characters match the TARGET template exactly. */ | |
2712 | ||
2713 | static bool | |
2714 | match_string_p (const char *target) | |
2715 | { | |
2716 | const char *p; | |
2717 | ||
2718 | for (p = target; *p; p++) | |
e0be6f02 | 2719 | if ((char) gfc_next_ascii_char () != *p) |
c72e5f7e | 2720 | return false; |
2721 | return true; | |
2722 | } | |
2723 | ||
4ee9c684 | 2724 | /* Matches an attribute specification including array specs. If |
2725 | successful, leaves the variables current_attr and current_as | |
2726 | holding the specification. Also sets the colon_seen variable for | |
2727 | later use by matchers associated with initializations. | |
2728 | ||
2729 | This subroutine is a little tricky in the sense that we don't know | |
2730 | if we really have an attr-spec until we hit the double colon. | |
2731 | Until that time, we can only return MATCH_NO. This forces us to | |
2732 | check for duplicate specification at this level. */ | |
2733 | ||
2734 | static match | |
2735 | match_attr_spec (void) | |
2736 | { | |
4ee9c684 | 2737 | /* Modifiers that can exist in a type statement. */ |
2738 | typedef enum | |
2739 | { GFC_DECL_BEGIN = 0, | |
2740 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
2741 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
3ea52af3 | 2742 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
2743 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
c72e5f7e | 2744 | DECL_IS_BIND_C, DECL_NONE, |
4ee9c684 | 2745 | GFC_DECL_END /* Sentinel */ |
2746 | } | |
2747 | decl_types; | |
2748 | ||
2749 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
2750 | #define NUM_DECL GFC_DECL_END | |
2751 | ||
4ee9c684 | 2752 | locus start, seen_at[NUM_DECL]; |
2753 | int seen[NUM_DECL]; | |
2754 | decl_types d; | |
2755 | const char *attr; | |
2756 | match m; | |
2757 | try t; | |
2758 | ||
2759 | gfc_clear_attr (¤t_attr); | |
cbb9e6aa | 2760 | start = gfc_current_locus; |
4ee9c684 | 2761 | |
2762 | current_as = NULL; | |
2763 | colon_seen = 0; | |
2764 | ||
2765 | /* See if we get all of the keywords up to the final double colon. */ | |
2766 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2767 | seen[d] = 0; | |
2768 | ||
2769 | for (;;) | |
2770 | { | |
e0be6f02 | 2771 | char ch; |
c5d33754 | 2772 | |
c72e5f7e | 2773 | d = DECL_NONE; |
2774 | gfc_gobble_whitespace (); | |
2775 | ||
e0be6f02 | 2776 | ch = gfc_next_ascii_char (); |
c72e5f7e | 2777 | if (ch == ':') |
2778 | { | |
2779 | /* This is the successful exit condition for the loop. */ | |
e0be6f02 | 2780 | if (gfc_next_ascii_char () == ':') |
c72e5f7e | 2781 | break; |
2782 | } | |
2783 | else if (ch == ',') | |
c5d33754 | 2784 | { |
c5d33754 | 2785 | gfc_gobble_whitespace (); |
e0be6f02 | 2786 | switch (gfc_peek_ascii_char ()) |
c5d33754 | 2787 | { |
c72e5f7e | 2788 | case 'a': |
2789 | if (match_string_p ("allocatable")) | |
2790 | d = DECL_ALLOCATABLE; | |
2791 | break; | |
2792 | ||
2793 | case 'b': | |
c5d33754 | 2794 | /* Try and match the bind(c). */ |
75ae7f6c | 2795 | m = gfc_match_bind_c (NULL, true); |
5cf92482 | 2796 | if (m == MATCH_YES) |
c5d33754 | 2797 | d = DECL_IS_BIND_C; |
5cf92482 | 2798 | else if (m == MATCH_ERROR) |
2799 | goto cleanup; | |
c72e5f7e | 2800 | break; |
2801 | ||
2802 | case 'd': | |
2803 | if (match_string_p ("dimension")) | |
2804 | d = DECL_DIMENSION; | |
2805 | break; | |
2806 | ||
2807 | case 'e': | |
2808 | if (match_string_p ("external")) | |
2809 | d = DECL_EXTERNAL; | |
2810 | break; | |
2811 | ||
2812 | case 'i': | |
2813 | if (match_string_p ("int")) | |
2814 | { | |
e0be6f02 | 2815 | ch = gfc_next_ascii_char (); |
c72e5f7e | 2816 | if (ch == 'e') |
2817 | { | |
2818 | if (match_string_p ("nt")) | |
2819 | { | |
2820 | /* Matched "intent". */ | |
2821 | /* TODO: Call match_intent_spec from here. */ | |
2822 | if (gfc_match (" ( in out )") == MATCH_YES) | |
2823 | d = DECL_INOUT; | |
2824 | else if (gfc_match (" ( in )") == MATCH_YES) | |
2825 | d = DECL_IN; | |
2826 | else if (gfc_match (" ( out )") == MATCH_YES) | |
2827 | d = DECL_OUT; | |
2828 | } | |
2829 | } | |
2830 | else if (ch == 'r') | |
2831 | { | |
2832 | if (match_string_p ("insic")) | |
2833 | { | |
2834 | /* Matched "intrinsic". */ | |
2835 | d = DECL_INTRINSIC; | |
2836 | } | |
2837 | } | |
2838 | } | |
2839 | break; | |
2840 | ||
2841 | case 'o': | |
2842 | if (match_string_p ("optional")) | |
2843 | d = DECL_OPTIONAL; | |
2844 | break; | |
2845 | ||
2846 | case 'p': | |
e0be6f02 | 2847 | gfc_next_ascii_char (); |
2848 | switch (gfc_next_ascii_char ()) | |
c72e5f7e | 2849 | { |
2850 | case 'a': | |
2851 | if (match_string_p ("rameter")) | |
2852 | { | |
2853 | /* Matched "parameter". */ | |
2854 | d = DECL_PARAMETER; | |
2855 | } | |
2856 | break; | |
2857 | ||
2858 | case 'o': | |
2859 | if (match_string_p ("inter")) | |
2860 | { | |
2861 | /* Matched "pointer". */ | |
2862 | d = DECL_POINTER; | |
2863 | } | |
2864 | break; | |
2865 | ||
2866 | case 'r': | |
e0be6f02 | 2867 | ch = gfc_next_ascii_char (); |
c72e5f7e | 2868 | if (ch == 'i') |
2869 | { | |
2870 | if (match_string_p ("vate")) | |
2871 | { | |
2872 | /* Matched "private". */ | |
2873 | d = DECL_PRIVATE; | |
2874 | } | |
2875 | } | |
2876 | else if (ch == 'o') | |
2877 | { | |
2878 | if (match_string_p ("tected")) | |
2879 | { | |
2880 | /* Matched "protected". */ | |
2881 | d = DECL_PROTECTED; | |
2882 | } | |
2883 | } | |
2884 | break; | |
2885 | ||
2886 | case 'u': | |
2887 | if (match_string_p ("blic")) | |
2888 | { | |
2889 | /* Matched "public". */ | |
2890 | d = DECL_PUBLIC; | |
2891 | } | |
2892 | break; | |
2893 | } | |
2894 | break; | |
2895 | ||
2896 | case 's': | |
2897 | if (match_string_p ("save")) | |
2898 | d = DECL_SAVE; | |
2899 | break; | |
2900 | ||
2901 | case 't': | |
2902 | if (match_string_p ("target")) | |
2903 | d = DECL_TARGET; | |
2904 | break; | |
2905 | ||
2906 | case 'v': | |
e0be6f02 | 2907 | gfc_next_ascii_char (); |
2908 | ch = gfc_next_ascii_char (); | |
c72e5f7e | 2909 | if (ch == 'a') |
2910 | { | |
2911 | if (match_string_p ("lue")) | |
2912 | { | |
2913 | /* Matched "value". */ | |
2914 | d = DECL_VALUE; | |
2915 | } | |
2916 | } | |
2917 | else if (ch == 'o') | |
2918 | { | |
2919 | if (match_string_p ("latile")) | |
2920 | { | |
2921 | /* Matched "volatile". */ | |
2922 | d = DECL_VOLATILE; | |
2923 | } | |
2924 | } | |
2925 | break; | |
c5d33754 | 2926 | } |
2927 | } | |
f3f9b222 | 2928 | |
c72e5f7e | 2929 | /* No double colon and no recognizable decl_type, so assume that |
2930 | we've been looking at something else the whole time. */ | |
2931 | if (d == DECL_NONE) | |
2932 | { | |
2933 | m = MATCH_NO; | |
2934 | goto cleanup; | |
2935 | } | |
e14bee04 | 2936 | |
7e221851 | 2937 | /* Check to make sure any parens are paired up correctly. */ |
2938 | if (gfc_match_parens () == MATCH_ERROR) | |
2939 | { | |
2940 | m = MATCH_ERROR; | |
2941 | goto cleanup; | |
2942 | } | |
2943 | ||
4ee9c684 | 2944 | seen[d]++; |
cbb9e6aa | 2945 | seen_at[d] = gfc_current_locus; |
4ee9c684 | 2946 | |
2947 | if (d == DECL_DIMENSION) | |
2948 | { | |
2949 | m = gfc_match_array_spec (¤t_as); | |
2950 | ||
2951 | if (m == MATCH_NO) | |
2952 | { | |
2953 | gfc_error ("Missing dimension specification at %C"); | |
2954 | m = MATCH_ERROR; | |
2955 | } | |
2956 | ||
2957 | if (m == MATCH_ERROR) | |
2958 | goto cleanup; | |
2959 | } | |
2960 | } | |
2961 | ||
4ee9c684 | 2962 | /* Since we've seen a double colon, we have to be looking at an |
2963 | attr-spec. This means that we can now issue errors. */ | |
2964 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2965 | if (seen[d] > 1) | |
2966 | { | |
2967 | switch (d) | |
2968 | { | |
2969 | case DECL_ALLOCATABLE: | |
2970 | attr = "ALLOCATABLE"; | |
2971 | break; | |
2972 | case DECL_DIMENSION: | |
2973 | attr = "DIMENSION"; | |
2974 | break; | |
2975 | case DECL_EXTERNAL: | |
2976 | attr = "EXTERNAL"; | |
2977 | break; | |
2978 | case DECL_IN: | |
2979 | attr = "INTENT (IN)"; | |
2980 | break; | |
2981 | case DECL_OUT: | |
2982 | attr = "INTENT (OUT)"; | |
2983 | break; | |
2984 | case DECL_INOUT: | |
2985 | attr = "INTENT (IN OUT)"; | |
2986 | break; | |
2987 | case DECL_INTRINSIC: | |
2988 | attr = "INTRINSIC"; | |
2989 | break; | |
2990 | case DECL_OPTIONAL: | |
2991 | attr = "OPTIONAL"; | |
2992 | break; | |
2993 | case DECL_PARAMETER: | |
2994 | attr = "PARAMETER"; | |
2995 | break; | |
2996 | case DECL_POINTER: | |
2997 | attr = "POINTER"; | |
2998 | break; | |
3ea52af3 | 2999 | case DECL_PROTECTED: |
3000 | attr = "PROTECTED"; | |
3001 | break; | |
4ee9c684 | 3002 | case DECL_PRIVATE: |
3003 | attr = "PRIVATE"; | |
3004 | break; | |
3005 | case DECL_PUBLIC: | |
3006 | attr = "PUBLIC"; | |
3007 | break; | |
3008 | case DECL_SAVE: | |
3009 | attr = "SAVE"; | |
3010 | break; | |
3011 | case DECL_TARGET: | |
3012 | attr = "TARGET"; | |
3013 | break; | |
c5d33754 | 3014 | case DECL_IS_BIND_C: |
3015 | attr = "IS_BIND_C"; | |
3016 | break; | |
3017 | case DECL_VALUE: | |
3018 | attr = "VALUE"; | |
3019 | break; | |
ef814c81 | 3020 | case DECL_VOLATILE: |
3021 | attr = "VOLATILE"; | |
3022 | break; | |
4ee9c684 | 3023 | default: |
f6d0e37a | 3024 | attr = NULL; /* This shouldn't happen. */ |
4ee9c684 | 3025 | } |
3026 | ||
3027 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
3028 | m = MATCH_ERROR; | |
3029 | goto cleanup; | |
3030 | } | |
3031 | ||
3032 | /* Now that we've dealt with duplicate attributes, add the attributes | |
3033 | to the current attribute. */ | |
3034 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3035 | { | |
3036 | if (seen[d] == 0) | |
3037 | continue; | |
3038 | ||
3039 | if (gfc_current_state () == COMP_DERIVED | |
3040 | && d != DECL_DIMENSION && d != DECL_POINTER | |
c72e5f7e | 3041 | && d != DECL_PRIVATE && d != DECL_PUBLIC |
3042 | && d != DECL_NONE) | |
4ee9c684 | 3043 | { |
2294b616 | 3044 | if (d == DECL_ALLOCATABLE) |
3045 | { | |
1a9745d2 | 3046 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
3047 | "attribute at %C in a TYPE definition") | |
e14bee04 | 3048 | == FAILURE) |
2294b616 | 3049 | { |
3050 | m = MATCH_ERROR; | |
3051 | goto cleanup; | |
3052 | } | |
1a9745d2 | 3053 | } |
3054 | else | |
2294b616 | 3055 | { |
3056 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
e14bee04 | 3057 | &seen_at[d]); |
2294b616 | 3058 | m = MATCH_ERROR; |
3059 | goto cleanup; | |
3060 | } | |
4ee9c684 | 3061 | } |
3062 | ||
ea13b9b7 | 3063 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
1a9745d2 | 3064 | && gfc_current_state () != COMP_MODULE) |
ea13b9b7 | 3065 | { |
3066 | if (d == DECL_PRIVATE) | |
3067 | attr = "PRIVATE"; | |
3068 | else | |
3069 | attr = "PUBLIC"; | |
e14bee04 | 3070 | if (gfc_current_state () == COMP_DERIVED |
3071 | && gfc_state_stack->previous | |
3072 | && gfc_state_stack->previous->state == COMP_MODULE) | |
3073 | { | |
3074 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s " | |
3075 | "at %L in a TYPE definition", attr, | |
3076 | &seen_at[d]) | |
3077 | == FAILURE) | |
3078 | { | |
3079 | m = MATCH_ERROR; | |
3080 | goto cleanup; | |
3081 | } | |
3082 | } | |
3083 | else | |
3084 | { | |
3085 | gfc_error ("%s attribute at %L is not allowed outside of the " | |
3086 | "specification part of a module", attr, &seen_at[d]); | |
3087 | m = MATCH_ERROR; | |
3088 | goto cleanup; | |
3089 | } | |
ea13b9b7 | 3090 | } |
3091 | ||
4ee9c684 | 3092 | switch (d) |
3093 | { | |
3094 | case DECL_ALLOCATABLE: | |
3095 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
3096 | break; | |
3097 | ||
3098 | case DECL_DIMENSION: | |
950683ed | 3099 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 3100 | break; |
3101 | ||
3102 | case DECL_EXTERNAL: | |
3103 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
3104 | break; | |
3105 | ||
3106 | case DECL_IN: | |
3107 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
3108 | break; | |
3109 | ||
3110 | case DECL_OUT: | |
3111 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
3112 | break; | |
3113 | ||
3114 | case DECL_INOUT: | |
3115 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
3116 | break; | |
3117 | ||
3118 | case DECL_INTRINSIC: | |
3119 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
3120 | break; | |
3121 | ||
3122 | case DECL_OPTIONAL: | |
3123 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
3124 | break; | |
3125 | ||
3126 | case DECL_PARAMETER: | |
950683ed | 3127 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
4ee9c684 | 3128 | break; |
3129 | ||
3130 | case DECL_POINTER: | |
3131 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
3132 | break; | |
3133 | ||
3ea52af3 | 3134 | case DECL_PROTECTED: |
3135 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
3136 | { | |
3137 | gfc_error ("PROTECTED at %C only allowed in specification " | |
3138 | "part of a module"); | |
3139 | t = FAILURE; | |
3140 | break; | |
3141 | } | |
3142 | ||
1a9745d2 | 3143 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
3144 | "attribute at %C") | |
3ea52af3 | 3145 | == FAILURE) |
3146 | t = FAILURE; | |
3147 | else | |
3148 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
3149 | break; | |
3150 | ||
4ee9c684 | 3151 | case DECL_PRIVATE: |
950683ed | 3152 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
3153 | &seen_at[d]); | |
4ee9c684 | 3154 | break; |
3155 | ||
3156 | case DECL_PUBLIC: | |
950683ed | 3157 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
3158 | &seen_at[d]); | |
4ee9c684 | 3159 | break; |
3160 | ||
3161 | case DECL_SAVE: | |
950683ed | 3162 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 3163 | break; |
3164 | ||
3165 | case DECL_TARGET: | |
3166 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
3167 | break; | |
3168 | ||
c5d33754 | 3169 | case DECL_IS_BIND_C: |
3170 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); | |
3171 | break; | |
3172 | ||
8f6339b6 | 3173 | case DECL_VALUE: |
1a9745d2 | 3174 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
3175 | "at %C") | |
8f6339b6 | 3176 | == FAILURE) |
3177 | t = FAILURE; | |
3178 | else | |
3179 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
3180 | break; | |
3181 | ||
ef814c81 | 3182 | case DECL_VOLATILE: |
3183 | if (gfc_notify_std (GFC_STD_F2003, | |
1a9745d2 | 3184 | "Fortran 2003: VOLATILE attribute at %C") |
ef814c81 | 3185 | == FAILURE) |
3186 | t = FAILURE; | |
3187 | else | |
3188 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
3189 | break; | |
3190 | ||
4ee9c684 | 3191 | default: |
3192 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
3193 | } | |
3194 | ||
3195 | if (t == FAILURE) | |
3196 | { | |
3197 | m = MATCH_ERROR; | |
3198 | goto cleanup; | |
3199 | } | |
3200 | } | |
3201 | ||
3202 | colon_seen = 1; | |
3203 | return MATCH_YES; | |
3204 | ||
3205 | cleanup: | |
cbb9e6aa | 3206 | gfc_current_locus = start; |
4ee9c684 | 3207 | gfc_free_array_spec (current_as); |
3208 | current_as = NULL; | |
3209 | return m; | |
3210 | } | |
3211 | ||
3212 | ||
c5d33754 | 3213 | /* Set the binding label, dest_label, either with the binding label |
3214 | stored in the given gfc_typespec, ts, or if none was provided, it | |
3215 | will be the symbol name in all lower case, as required by the draft | |
3216 | (J3/04-007, section 15.4.1). If a binding label was given and | |
3217 | there is more than one argument (num_idents), it is an error. */ | |
3218 | ||
3219 | try | |
3220 | set_binding_label (char *dest_label, const char *sym_name, int num_idents) | |
3221 | { | |
825718f9 | 3222 | if (num_idents > 1 && has_name_equals) |
c5d33754 | 3223 | { |
825718f9 | 3224 | gfc_error ("Multiple identifiers provided with " |
3225 | "single NAME= specifier at %C"); | |
3226 | return FAILURE; | |
3227 | } | |
c5d33754 | 3228 | |
825718f9 | 3229 | if (curr_binding_label[0] != '\0') |
3230 | { | |
c5d33754 | 3231 | /* Binding label given; store in temp holder til have sym. */ |
b1223b39 | 3232 | strcpy (dest_label, curr_binding_label); |
c5d33754 | 3233 | } |
3234 | else | |
3235 | { | |
3236 | /* No binding label given, and the NAME= specifier did not exist, | |
3237 | which means there was no NAME="". */ | |
3238 | if (sym_name != NULL && has_name_equals == 0) | |
b1223b39 | 3239 | strcpy (dest_label, sym_name); |
c5d33754 | 3240 | } |
3241 | ||
3242 | return SUCCESS; | |
3243 | } | |
3244 | ||
3245 | ||
3246 | /* Set the status of the given common block as being BIND(C) or not, | |
3247 | depending on the given parameter, is_bind_c. */ | |
3248 | ||
3249 | void | |
3250 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) | |
3251 | { | |
3252 | com_block->is_bind_c = is_bind_c; | |
3253 | return; | |
3254 | } | |
3255 | ||
3256 | ||
3257 | /* Verify that the given gfc_typespec is for a C interoperable type. */ | |
3258 | ||
3259 | try | |
3260 | verify_c_interop (gfc_typespec *ts, const char *name, locus *where) | |
3261 | { | |
3262 | try t; | |
3263 | ||
3264 | /* Make sure the kind used is appropriate for the type. | |
3265 | The f90_type is unknown if an integer constant was | |
3266 | used (e.g., real(4), bind(c) :: myFloat). */ | |
3267 | if (ts->f90_type != BT_UNKNOWN) | |
3268 | { | |
3269 | t = gfc_validate_c_kind (ts); | |
3270 | if (t != SUCCESS) | |
3271 | { | |
3272 | /* Print an error, but continue parsing line. */ | |
3273 | gfc_error_now ("C kind parameter is for type %s but " | |
3274 | "symbol '%s' at %L is of type %s", | |
3275 | gfc_basic_typename (ts->f90_type), | |
3276 | name, where, | |
3277 | gfc_basic_typename (ts->type)); | |
3278 | } | |
3279 | } | |
3280 | ||
3281 | /* Make sure the kind is C interoperable. This does not care about the | |
3282 | possible error above. */ | |
3283 | if (ts->type == BT_DERIVED && ts->derived != NULL) | |
3284 | return (ts->derived->ts.is_c_interop ? SUCCESS : FAILURE); | |
3285 | else if (ts->is_c_interop != 1) | |
3286 | return FAILURE; | |
3287 | ||
3288 | return SUCCESS; | |
3289 | } | |
3290 | ||
3291 | ||
3292 | /* Verify that the variables of a given common block, which has been | |
3293 | defined with the attribute specifier bind(c), to be of a C | |
3294 | interoperable type. Errors will be reported here, if | |
3295 | encountered. */ | |
3296 | ||
3297 | try | |
3298 | verify_com_block_vars_c_interop (gfc_common_head *com_block) | |
3299 | { | |
3300 | gfc_symbol *curr_sym = NULL; | |
3301 | try retval = SUCCESS; | |
3302 | ||
3303 | curr_sym = com_block->head; | |
3304 | ||
3305 | /* Make sure we have at least one symbol. */ | |
3306 | if (curr_sym == NULL) | |
3307 | return retval; | |
3308 | ||
3309 | /* Here we know we have a symbol, so we'll execute this loop | |
3310 | at least once. */ | |
3311 | do | |
3312 | { | |
3313 | /* The second to last param, 1, says this is in a common block. */ | |
3314 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); | |
3315 | curr_sym = curr_sym->common_next; | |
3316 | } while (curr_sym != NULL); | |
3317 | ||
3318 | return retval; | |
3319 | } | |
3320 | ||
3321 | ||
3322 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, | |
3323 | an appropriate error message is reported. */ | |
3324 | ||
3325 | try | |
3326 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, | |
3327 | int is_in_common, gfc_common_head *com_block) | |
3328 | { | |
3329 | try retval = SUCCESS; | |
4f7bb9ec | 3330 | |
3331 | if (tmp_sym->attr.function && tmp_sym->result != NULL) | |
3332 | { | |
3333 | tmp_sym = tmp_sym->result; | |
3334 | /* Make sure it wasn't an implicitly typed result. */ | |
3335 | if (tmp_sym->attr.implicit_type) | |
3336 | { | |
3337 | gfc_warning ("Implicitly declared BIND(C) function '%s' at " | |
3338 | "%L may not be C interoperable", tmp_sym->name, | |
3339 | &tmp_sym->declared_at); | |
3340 | tmp_sym->ts.f90_type = tmp_sym->ts.type; | |
3341 | /* Mark it as C interoperable to prevent duplicate warnings. */ | |
3342 | tmp_sym->ts.is_c_interop = 1; | |
3343 | tmp_sym->attr.is_c_interop = 1; | |
3344 | } | |
3345 | } | |
c5d33754 | 3346 | |
3347 | /* Here, we know we have the bind(c) attribute, so if we have | |
3348 | enough type info, then verify that it's a C interop kind. | |
3349 | The info could be in the symbol already, or possibly still in | |
3350 | the given ts (current_ts), so look in both. */ | |
3351 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) | |
3352 | { | |
3353 | if (verify_c_interop (&(tmp_sym->ts), tmp_sym->name, | |
3354 | &(tmp_sym->declared_at)) != SUCCESS) | |
3355 | { | |
3356 | /* See if we're dealing with a sym in a common block or not. */ | |
3357 | if (is_in_common == 1) | |
3358 | { | |
3359 | gfc_warning ("Variable '%s' in common block '%s' at %L " | |
3360 | "may not be a C interoperable " | |
3361 | "kind though common block '%s' is BIND(C)", | |
3362 | tmp_sym->name, com_block->name, | |
3363 | &(tmp_sym->declared_at), com_block->name); | |
3364 | } | |
3365 | else | |
3366 | { | |
3367 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) | |
3368 | gfc_error ("Type declaration '%s' at %L is not C " | |
3369 | "interoperable but it is BIND(C)", | |
3370 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3371 | else | |
3372 | gfc_warning ("Variable '%s' at %L " | |
3373 | "may not be a C interoperable " | |
3374 | "kind but it is bind(c)", | |
3375 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3376 | } | |
3377 | } | |
3378 | ||
3379 | /* Variables declared w/in a common block can't be bind(c) | |
3380 | since there's no way for C to see these variables, so there's | |
3381 | semantically no reason for the attribute. */ | |
3382 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) | |
3383 | { | |
3384 | gfc_error ("Variable '%s' in common block '%s' at " | |
3385 | "%L cannot be declared with BIND(C) " | |
3386 | "since it is not a global", | |
3387 | tmp_sym->name, com_block->name, | |
3388 | &(tmp_sym->declared_at)); | |
3389 | retval = FAILURE; | |
3390 | } | |
3391 | ||
3392 | /* Scalar variables that are bind(c) can not have the pointer | |
3393 | or allocatable attributes. */ | |
3394 | if (tmp_sym->attr.is_bind_c == 1) | |
3395 | { | |
3396 | if (tmp_sym->attr.pointer == 1) | |
3397 | { | |
3398 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3399 | "POINTER and BIND(C) attributes", | |
3400 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3401 | retval = FAILURE; | |
3402 | } | |
3403 | ||
3404 | if (tmp_sym->attr.allocatable == 1) | |
3405 | { | |
3406 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3407 | "ALLOCATABLE and BIND(C) attributes", | |
3408 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3409 | retval = FAILURE; | |
3410 | } | |
3411 | ||
3412 | /* If it is a BIND(C) function, make sure the return value is a | |
3413 | scalar value. The previous tests in this function made sure | |
3414 | the type is interoperable. */ | |
3415 | if (tmp_sym->attr.function == 1 && tmp_sym->as != NULL) | |
3416 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3417 | "be an array", tmp_sym->name, &(tmp_sym->declared_at)); | |
3418 | ||
3419 | /* BIND(C) functions can not return a character string. */ | |
3420 | if (tmp_sym->attr.function == 1 && tmp_sym->ts.type == BT_CHARACTER) | |
3421 | if (tmp_sym->ts.cl == NULL || tmp_sym->ts.cl->length == NULL | |
3422 | || tmp_sym->ts.cl->length->expr_type != EXPR_CONSTANT | |
3423 | || mpz_cmp_si (tmp_sym->ts.cl->length->value.integer, 1) != 0) | |
3424 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3425 | "be a character string", tmp_sym->name, | |
3426 | &(tmp_sym->declared_at)); | |
3427 | } | |
3428 | } | |
3429 | ||
3430 | /* See if the symbol has been marked as private. If it has, make sure | |
3431 | there is no binding label and warn the user if there is one. */ | |
3432 | if (tmp_sym->attr.access == ACCESS_PRIVATE | |
3433 | && tmp_sym->binding_label[0] != '\0') | |
3434 | /* Use gfc_warning_now because we won't say that the symbol fails | |
3435 | just because of this. */ | |
3436 | gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " | |
3437 | "given the binding label '%s'", tmp_sym->name, | |
3438 | &(tmp_sym->declared_at), tmp_sym->binding_label); | |
3439 | ||
3440 | return retval; | |
3441 | } | |
3442 | ||
3443 | ||
3444 | /* Set the appropriate fields for a symbol that's been declared as | |
3445 | BIND(C) (the is_bind_c flag and the binding label), and verify that | |
3446 | the type is C interoperable. Errors are reported by the functions | |
3447 | used to set/test these fields. */ | |
3448 | ||
3449 | try | |
3450 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) | |
3451 | { | |
3452 | try retval = SUCCESS; | |
3453 | ||
3454 | /* TODO: Do we need to make sure the vars aren't marked private? */ | |
3455 | ||
3456 | /* Set the is_bind_c bit in symbol_attribute. */ | |
3457 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); | |
3458 | ||
3459 | if (set_binding_label (tmp_sym->binding_label, tmp_sym->name, | |
3460 | num_idents) != SUCCESS) | |
3461 | return FAILURE; | |
3462 | ||
3463 | return retval; | |
3464 | } | |
3465 | ||
3466 | ||
3467 | /* Set the fields marking the given common block as BIND(C), including | |
3468 | a binding label, and report any errors encountered. */ | |
3469 | ||
3470 | try | |
3471 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) | |
3472 | { | |
3473 | try retval = SUCCESS; | |
3474 | ||
3475 | /* destLabel, common name, typespec (which may have binding label). */ | |
3476 | if (set_binding_label (com_block->binding_label, com_block->name, num_idents) | |
3477 | != SUCCESS) | |
3478 | return FAILURE; | |
3479 | ||
3480 | /* Set the given common block (com_block) to being bind(c) (1). */ | |
3481 | set_com_block_bind_c (com_block, 1); | |
3482 | ||
3483 | return retval; | |
3484 | } | |
3485 | ||
3486 | ||
3487 | /* Retrieve the list of one or more identifiers that the given bind(c) | |
3488 | attribute applies to. */ | |
3489 | ||
3490 | try | |
3491 | get_bind_c_idents (void) | |
3492 | { | |
3493 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3494 | int num_idents = 0; | |
3495 | gfc_symbol *tmp_sym = NULL; | |
3496 | match found_id; | |
3497 | gfc_common_head *com_block = NULL; | |
3498 | ||
3499 | if (gfc_match_name (name) == MATCH_YES) | |
3500 | { | |
3501 | found_id = MATCH_YES; | |
3502 | gfc_get_ha_symbol (name, &tmp_sym); | |
3503 | } | |
3504 | else if (match_common_name (name) == MATCH_YES) | |
3505 | { | |
3506 | found_id = MATCH_YES; | |
3507 | com_block = gfc_get_common (name, 0); | |
3508 | } | |
3509 | else | |
3510 | { | |
3511 | gfc_error ("Need either entity or common block name for " | |
3512 | "attribute specification statement at %C"); | |
3513 | return FAILURE; | |
3514 | } | |
3515 | ||
3516 | /* Save the current identifier and look for more. */ | |
3517 | do | |
3518 | { | |
3519 | /* Increment the number of identifiers found for this spec stmt. */ | |
3520 | num_idents++; | |
3521 | ||
3522 | /* Make sure we have a sym or com block, and verify that it can | |
3523 | be bind(c). Set the appropriate field(s) and look for more | |
3524 | identifiers. */ | |
3525 | if (tmp_sym != NULL || com_block != NULL) | |
3526 | { | |
3527 | if (tmp_sym != NULL) | |
3528 | { | |
3529 | if (set_verify_bind_c_sym (tmp_sym, num_idents) | |
3530 | != SUCCESS) | |
3531 | return FAILURE; | |
3532 | } | |
3533 | else | |
3534 | { | |
3535 | if (set_verify_bind_c_com_block(com_block, num_idents) | |
3536 | != SUCCESS) | |
3537 | return FAILURE; | |
3538 | } | |
3539 | ||
3540 | /* Look to see if we have another identifier. */ | |
3541 | tmp_sym = NULL; | |
3542 | if (gfc_match_eos () == MATCH_YES) | |
3543 | found_id = MATCH_NO; | |
3544 | else if (gfc_match_char (',') != MATCH_YES) | |
3545 | found_id = MATCH_NO; | |
3546 | else if (gfc_match_name (name) == MATCH_YES) | |
3547 | { | |
3548 | found_id = MATCH_YES; | |
3549 | gfc_get_ha_symbol (name, &tmp_sym); | |
3550 | } | |
3551 | else if (match_common_name (name) == MATCH_YES) | |
3552 | { | |
3553 | found_id = MATCH_YES; | |
3554 | com_block = gfc_get_common (name, 0); | |
3555 | } | |
3556 | else | |
3557 | { | |
3558 | gfc_error ("Missing entity or common block name for " | |
3559 | "attribute specification statement at %C"); | |
3560 | return FAILURE; | |
3561 | } | |
3562 | } | |
3563 | else | |
3564 | { | |
3565 | gfc_internal_error ("Missing symbol"); | |
3566 | } | |
3567 | } while (found_id == MATCH_YES); | |
3568 | ||
3569 | /* if we get here we were successful */ | |
3570 | return SUCCESS; | |
3571 | } | |
3572 | ||
3573 | ||
3574 | /* Try and match a BIND(C) attribute specification statement. */ | |
3575 | ||
3576 | match | |
3577 | gfc_match_bind_c_stmt (void) | |
3578 | { | |
3579 | match found_match = MATCH_NO; | |
3580 | gfc_typespec *ts; | |
3581 | ||
3582 | ts = ¤t_ts; | |
3583 | ||
3584 | /* This may not be necessary. */ | |
3585 | gfc_clear_ts (ts); | |
3586 | /* Clear the temporary binding label holder. */ | |
3587 | curr_binding_label[0] = '\0'; | |
3588 | ||
3589 | /* Look for the bind(c). */ | |
75ae7f6c | 3590 | found_match = gfc_match_bind_c (NULL, true); |
c5d33754 | 3591 | |
3592 | if (found_match == MATCH_YES) | |
3593 | { | |
3594 | /* Look for the :: now, but it is not required. */ | |
3595 | gfc_match (" :: "); | |
3596 | ||
3597 | /* Get the identifier(s) that needs to be updated. This may need to | |
3598 | change to hand the flag(s) for the attr specified so all identifiers | |
3599 | found can have all appropriate parts updated (assuming that the same | |
3600 | spec stmt can have multiple attrs, such as both bind(c) and | |
3601 | allocatable...). */ | |
3602 | if (get_bind_c_idents () != SUCCESS) | |
3603 | /* Error message should have printed already. */ | |
3604 | return MATCH_ERROR; | |
3605 | } | |
3606 | ||
3607 | return found_match; | |
3608 | } | |
3609 | ||
3610 | ||
4ee9c684 | 3611 | /* Match a data declaration statement. */ |
3612 | ||
3613 | match | |
3614 | gfc_match_data_decl (void) | |
3615 | { | |
3616 | gfc_symbol *sym; | |
3617 | match m; | |
3923b69f | 3618 | int elem; |
4ee9c684 | 3619 | |
c5d33754 | 3620 | num_idents_on_line = 0; |
3621 | ||
67a51c8e | 3622 | m = gfc_match_type_spec (¤t_ts, 0); |
4ee9c684 | 3623 | if (m != MATCH_YES) |
3624 | return m; | |
3625 | ||
3626 | if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) | |
3627 | { | |
3628 | sym = gfc_use_derived (current_ts.derived); | |
3629 | ||
3630 | if (sym == NULL) | |
3631 | { | |
3632 | m = MATCH_ERROR; | |
3633 | goto cleanup; | |
3634 | } | |
3635 | ||
3636 | current_ts.derived = sym; | |
3637 | } | |
3638 | ||
3639 | m = match_attr_spec (); | |
3640 | if (m == MATCH_ERROR) | |
3641 | { | |
3642 | m = MATCH_NO; | |
3643 | goto cleanup; | |
3644 | } | |
3645 | ||
e6b82afc | 3646 | if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL |
3647 | && !current_ts.derived->attr.zero_comp) | |
4ee9c684 | 3648 | { |
3649 | ||
3650 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
3651 | goto ok; | |
3652 | ||
40cf8078 | 3653 | gfc_find_symbol (current_ts.derived->name, |
1a9745d2 | 3654 | current_ts.derived->ns->parent, 1, &sym); |
4ee9c684 | 3655 | |
40cf8078 | 3656 | /* Any symbol that we find had better be a type definition |
1a9745d2 | 3657 | which has its components defined. */ |
40cf8078 | 3658 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
e6b82afc | 3659 | && (current_ts.derived->components != NULL |
3660 | || current_ts.derived->attr.zero_comp)) | |
4ee9c684 | 3661 | goto ok; |
3662 | ||
40cf8078 | 3663 | /* Now we have an error, which we signal, and then fix up |
3664 | because the knock-on is plain and simple confusing. */ | |
3665 | gfc_error_now ("Derived type at %C has not been previously defined " | |
1a9745d2 | 3666 | "and so cannot appear in a derived type definition"); |
40cf8078 | 3667 | current_attr.pointer = 1; |
3668 | goto ok; | |
4ee9c684 | 3669 | } |
3670 | ||
3671 | ok: | |
3672 | /* If we have an old-style character declaration, and no new-style | |
3673 | attribute specifications, then there a comma is optional between | |
3674 | the type specification and the variable list. */ | |
3675 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
3676 | gfc_match_char (','); | |
3677 | ||
3923b69f | 3678 | /* Give the types/attributes to symbols that follow. Give the element |
3679 | a number so that repeat character length expressions can be copied. */ | |
3680 | elem = 1; | |
4ee9c684 | 3681 | for (;;) |
3682 | { | |
c5d33754 | 3683 | num_idents_on_line++; |
3923b69f | 3684 | m = variable_decl (elem++); |
4ee9c684 | 3685 | if (m == MATCH_ERROR) |
3686 | goto cleanup; | |
3687 | if (m == MATCH_NO) | |
3688 | break; | |
3689 | ||
3690 | if (gfc_match_eos () == MATCH_YES) | |
3691 | goto cleanup; | |
3692 | if (gfc_match_char (',') != MATCH_YES) | |
3693 | break; | |
3694 | } | |
3695 | ||
8f0bdb23 | 3696 | if (gfc_error_flag_test () == 0) |
3697 | gfc_error ("Syntax error in data declaration at %C"); | |
4ee9c684 | 3698 | m = MATCH_ERROR; |
3699 | ||
af29c1f0 | 3700 | gfc_free_data_all (gfc_current_ns); |
3701 | ||
4ee9c684 | 3702 | cleanup: |
3703 | gfc_free_array_spec (current_as); | |
3704 | current_as = NULL; | |
3705 | return m; | |
3706 | } | |
3707 | ||
3708 | ||
3709 | /* Match a prefix associated with a function or subroutine | |
3710 | declaration. If the typespec pointer is nonnull, then a typespec | |
3711 | can be matched. Note that if nothing matches, MATCH_YES is | |
3712 | returned (the null string was matched). */ | |
3713 | ||
077932f9 | 3714 | match |
3715 | gfc_match_prefix (gfc_typespec *ts) | |
4ee9c684 | 3716 | { |
5b11d932 | 3717 | bool seen_type; |
4ee9c684 | 3718 | |
3719 | gfc_clear_attr (¤t_attr); | |
3720 | seen_type = 0; | |
3721 | ||
3722 | loop: | |
3723 | if (!seen_type && ts != NULL | |
67a51c8e | 3724 | && gfc_match_type_spec (ts, 0) == MATCH_YES |
4ee9c684 | 3725 | && gfc_match_space () == MATCH_YES) |
3726 | { | |
3727 | ||
3728 | seen_type = 1; | |
3729 | goto loop; | |
3730 | } | |
3731 | ||
3732 | if (gfc_match ("elemental% ") == MATCH_YES) | |
3733 | { | |
3734 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
3735 | return MATCH_ERROR; | |
3736 | ||
3737 | goto loop; | |
3738 | } | |
3739 | ||
3740 | if (gfc_match ("pure% ") == MATCH_YES) | |
3741 | { | |
3742 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
3743 | return MATCH_ERROR; | |
3744 | ||
3745 | goto loop; | |
3746 | } | |
3747 | ||
3748 | if (gfc_match ("recursive% ") == MATCH_YES) | |
3749 | { | |
3750 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
3751 | return MATCH_ERROR; | |
3752 | ||
3753 | goto loop; | |
3754 | } | |
3755 | ||
3756 | /* At this point, the next item is not a prefix. */ | |
3757 | return MATCH_YES; | |
3758 | } | |
3759 | ||
3760 | ||
077932f9 | 3761 | /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */ |
4ee9c684 | 3762 | |
3763 | static try | |
1a9745d2 | 3764 | copy_prefix (symbol_attribute *dest, locus *where) |
4ee9c684 | 3765 | { |
4ee9c684 | 3766 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
3767 | return FAILURE; | |
3768 | ||
3769 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
3770 | return FAILURE; | |
3771 | ||
3772 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
3773 | return FAILURE; | |
3774 | ||
3775 | return SUCCESS; | |
3776 | } | |
3777 | ||
3778 | ||
3779 | /* Match a formal argument list. */ | |
3780 | ||
3781 | match | |
1a9745d2 | 3782 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
4ee9c684 | 3783 | { |
3784 | gfc_formal_arglist *head, *tail, *p, *q; | |
3785 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3786 | gfc_symbol *sym; | |
3787 | match m; | |
3788 | ||
3789 | head = tail = NULL; | |
3790 | ||
3791 | if (gfc_match_char ('(') != MATCH_YES) | |
3792 | { | |
3793 | if (null_flag) | |
3794 | goto ok; | |
3795 | return MATCH_NO; | |
3796 | } | |
3797 | ||
3798 | if (gfc_match_char (')') == MATCH_YES) | |
3799 | goto ok; | |
3800 | ||
3801 | for (;;) | |
3802 | { | |
3803 | if (gfc_match_char ('*') == MATCH_YES) | |
3804 | sym = NULL; | |
3805 | else | |
3806 | { | |
3807 | m = gfc_match_name (name); | |
3808 | if (m != MATCH_YES) | |
3809 | goto cleanup; | |
3810 | ||
3811 | if (gfc_get_symbol (name, NULL, &sym)) | |
3812 | goto cleanup; | |
3813 | } | |
3814 | ||
3815 | p = gfc_get_formal_arglist (); | |
3816 | ||
3817 | if (head == NULL) | |
3818 | head = tail = p; | |
3819 | else | |
3820 | { | |
3821 | tail->next = p; | |
3822 | tail = p; | |
3823 | } | |
3824 | ||
3825 | tail->sym = sym; | |
3826 | ||
3827 | /* We don't add the VARIABLE flavor because the name could be a | |
1a9745d2 | 3828 | dummy procedure. We don't apply these attributes to formal |
3829 | arguments of statement functions. */ | |
4ee9c684 | 3830 | if (sym != NULL && !st_flag |
950683ed | 3831 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
4ee9c684 | 3832 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
3833 | { | |
3834 | m = MATCH_ERROR; | |
3835 | goto cleanup; | |
3836 | } | |
3837 | ||
3838 | /* The name of a program unit can be in a different namespace, | |
1a9745d2 | 3839 | so check for it explicitly. After the statement is accepted, |
3840 | the name is checked for especially in gfc_get_symbol(). */ | |
4ee9c684 | 3841 | if (gfc_new_block != NULL && sym != NULL |
3842 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
3843 | { | |
3844 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
3845 | sym->name); | |
3846 | m = MATCH_ERROR; | |
3847 | goto cleanup; | |
3848 | } | |
3849 | ||
3850 | if (gfc_match_char (')') == MATCH_YES) | |
3851 | goto ok; | |
3852 | ||
3853 | m = gfc_match_char (','); | |
3854 | if (m != MATCH_YES) | |
3855 | { | |
3856 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
3857 | goto cleanup; | |
3858 | } | |
3859 | } | |
3860 | ||
3861 | ok: | |
3862 | /* Check for duplicate symbols in the formal argument list. */ | |
3863 | if (head != NULL) | |
3864 | { | |
3865 | for (p = head; p->next; p = p->next) | |
3866 | { | |
3867 | if (p->sym == NULL) | |
3868 | continue; | |
3869 | ||
3870 | for (q = p->next; q; q = q->next) | |
3871 | if (p->sym == q->sym) | |
3872 | { | |
1a9745d2 | 3873 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
3874 | "at %C", p->sym->name); | |
4ee9c684 | 3875 | |
3876 | m = MATCH_ERROR; | |
3877 | goto cleanup; | |
3878 | } | |
3879 | } | |
3880 | } | |
3881 | ||
f6d0e37a | 3882 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) |
3883 | == FAILURE) | |
4ee9c684 | 3884 | { |
3885 | m = MATCH_ERROR; | |
3886 | goto cleanup; | |
3887 | } | |
3888 | ||
3889 | return MATCH_YES; | |
3890 | ||
3891 | cleanup: | |
3892 | gfc_free_formal_arglist (head); | |
3893 | return m; | |
3894 | } | |
3895 | ||
3896 | ||
3897 | /* Match a RESULT specification following a function declaration or | |
3898 | ENTRY statement. Also matches the end-of-statement. */ | |
3899 | ||
3900 | static match | |
f6d0e37a | 3901 | match_result (gfc_symbol *function, gfc_symbol **result) |
4ee9c684 | 3902 | { |
3903 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3904 | gfc_symbol *r; | |
3905 | match m; | |
3906 | ||
3907 | if (gfc_match (" result (") != MATCH_YES) | |
3908 | return MATCH_NO; | |
3909 | ||
3910 | m = gfc_match_name (name); | |
3911 | if (m != MATCH_YES) | |
3912 | return m; | |
3913 | ||
c5d33754 | 3914 | /* Get the right paren, and that's it because there could be the |
3915 | bind(c) attribute after the result clause. */ | |
3916 | if (gfc_match_char(')') != MATCH_YES) | |
4ee9c684 | 3917 | { |
c5d33754 | 3918 | /* TODO: should report the missing right paren here. */ |
4ee9c684 | 3919 | return MATCH_ERROR; |
3920 | } | |
3921 | ||
3922 | if (strcmp (function->name, name) == 0) | |
3923 | { | |
1a9745d2 | 3924 | gfc_error ("RESULT variable at %C must be different than function name"); |
4ee9c684 | 3925 | return MATCH_ERROR; |
3926 | } | |
3927 | ||
3928 | if (gfc_get_symbol (name, NULL, &r)) | |
3929 | return MATCH_ERROR; | |
3930 | ||
950683ed | 3931 | if (gfc_add_flavor (&r->attr, FL_VARIABLE, r->name, NULL) == FAILURE |
3932 | || gfc_add_result (&r->attr, r->name, NULL) == FAILURE) | |
4ee9c684 | 3933 | return MATCH_ERROR; |
3934 | ||
3935 | *result = r; | |
3936 | ||
3937 | return MATCH_YES; | |
3938 | } | |
3939 | ||
3940 | ||
c5d33754 | 3941 | /* Match a function suffix, which could be a combination of a result |
3942 | clause and BIND(C), either one, or neither. The draft does not | |
3943 | require them to come in a specific order. */ | |
3944 | ||
3945 | match | |
3946 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) | |
3947 | { | |
3948 | match is_bind_c; /* Found bind(c). */ | |
3949 | match is_result; /* Found result clause. */ | |
3950 | match found_match; /* Status of whether we've found a good match. */ | |
e0be6f02 | 3951 | char peek_char; /* Character we're going to peek at. */ |
75ae7f6c | 3952 | bool allow_binding_name; |
c5d33754 | 3953 | |
3954 | /* Initialize to having found nothing. */ | |
3955 | found_match = MATCH_NO; | |
3956 | is_bind_c = MATCH_NO; | |
3957 | is_result = MATCH_NO; | |
3958 | ||
3959 | /* Get the next char to narrow between result and bind(c). */ | |
3960 | gfc_gobble_whitespace (); | |
e0be6f02 | 3961 | peek_char = gfc_peek_ascii_char (); |
c5d33754 | 3962 | |
75ae7f6c | 3963 | /* C binding names are not allowed for internal procedures. */ |
3964 | if (gfc_current_state () == COMP_CONTAINS | |
3965 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
3966 | allow_binding_name = false; | |
3967 | else | |
3968 | allow_binding_name = true; | |
3969 | ||
c5d33754 | 3970 | switch (peek_char) |
3971 | { | |
3972 | case 'r': | |
3973 | /* Look for result clause. */ | |
3974 | is_result = match_result (sym, result); | |
3975 | if (is_result == MATCH_YES) | |
3976 | { | |
3977 | /* Now see if there is a bind(c) after it. */ | |
75ae7f6c | 3978 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 3979 | /* We've found the result clause and possibly bind(c). */ |
3980 | found_match = MATCH_YES; | |
3981 | } | |
3982 | else | |
3983 | /* This should only be MATCH_ERROR. */ | |
3984 | found_match = is_result; | |
3985 | break; | |
3986 | case 'b': | |
3987 | /* Look for bind(c) first. */ | |
75ae7f6c | 3988 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 3989 | if (is_bind_c == MATCH_YES) |
3990 | { | |
3991 | /* Now see if a result clause followed it. */ | |
3992 | is_result = match_result (sym, result); | |
3993 | found_match = MATCH_YES; | |
3994 | } | |
3995 | else | |
3996 | { | |
3997 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ | |
3998 | found_match = MATCH_ERROR; | |
3999 | } | |
4000 | break; | |
4001 | default: | |
4002 | gfc_error ("Unexpected junk after function declaration at %C"); | |
4003 | found_match = MATCH_ERROR; | |
4004 | break; | |
4005 | } | |
4006 | ||
c5d33754 | 4007 | if (is_bind_c == MATCH_YES) |
4518e961 | 4008 | { |
75ae7f6c | 4009 | /* Fortran 2008 draft allows BIND(C) for internal procedures. */ |
4518e961 | 4010 | if (gfc_current_state () == COMP_CONTAINS |
75ae7f6c | 4011 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
2dcae6c7 | 4012 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
4013 | "at %L may not be specified for an internal " | |
4014 | "procedure", &gfc_current_locus) | |
75ae7f6c | 4015 | == FAILURE) |
4016 | return MATCH_ERROR; | |
4017 | ||
4518e961 | 4018 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) |
4019 | == FAILURE) | |
4020 | return MATCH_ERROR; | |
4021 | } | |
c5d33754 | 4022 | |
4023 | return found_match; | |
4024 | } | |
4025 | ||
4026 | ||
af1a34ee | 4027 | /* Match a PROCEDURE declaration (R1211). */ |
4028 | ||
4029 | static match | |
4030 | match_procedure_decl (void) | |
4031 | { | |
4032 | match m; | |
4033 | locus old_loc, entry_loc; | |
4034 | gfc_symbol *sym, *proc_if = NULL; | |
4035 | int num; | |
4036 | ||
4037 | old_loc = entry_loc = gfc_current_locus; | |
4038 | ||
4039 | gfc_clear_ts (¤t_ts); | |
4040 | ||
4041 | if (gfc_match (" (") != MATCH_YES) | |
4042 | { | |
4043 | gfc_current_locus = entry_loc; | |
4044 | return MATCH_NO; | |
4045 | } | |
4046 | ||
4047 | /* Get the type spec. for the procedure interface. */ | |
4048 | old_loc = gfc_current_locus; | |
67a51c8e | 4049 | m = gfc_match_type_spec (¤t_ts, 0); |
e0be6f02 | 4050 | if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')')) |
af1a34ee | 4051 | goto got_ts; |
4052 | ||
4053 | if (m == MATCH_ERROR) | |
4054 | return m; | |
4055 | ||
4056 | gfc_current_locus = old_loc; | |
4057 | ||
4058 | /* Get the name of the procedure or abstract interface | |
4059 | to inherit the interface from. */ | |
4060 | m = gfc_match_symbol (&proc_if, 1); | |
4061 | ||
4062 | if (m == MATCH_NO) | |
4063 | goto syntax; | |
4064 | else if (m == MATCH_ERROR) | |
4065 | return m; | |
4066 | ||
4067 | /* Various interface checks. */ | |
4068 | if (proc_if) | |
4069 | { | |
74113644 | 4070 | /* Resolve interface if possible. That way, attr.procedure is only set |
4071 | if it is declared by a later procedure-declaration-stmt, which is | |
4072 | invalid per C1212. */ | |
2cd2bb5c | 4073 | while (proc_if->ts.interface) |
4074 | proc_if = proc_if->ts.interface; | |
74113644 | 4075 | |
af1a34ee | 4076 | if (proc_if->generic) |
4077 | { | |
4078 | gfc_error ("Interface '%s' at %C may not be generic", proc_if->name); | |
4079 | return MATCH_ERROR; | |
4080 | } | |
4081 | if (proc_if->attr.proc == PROC_ST_FUNCTION) | |
4082 | { | |
4083 | gfc_error ("Interface '%s' at %C may not be a statement function", | |
4084 | proc_if->name); | |
4085 | return MATCH_ERROR; | |
4086 | } | |
4087 | /* Handle intrinsic procedures. */ | |
7dff348f | 4088 | if (!(proc_if->attr.external || proc_if->attr.use_assoc |
4089 | || proc_if->attr.if_source == IFSRC_IFBODY) | |
4090 | && (gfc_intrinsic_name (proc_if->name, 0) | |
4091 | || gfc_intrinsic_name (proc_if->name, 1))) | |
af1a34ee | 4092 | proc_if->attr.intrinsic = 1; |
4093 | if (proc_if->attr.intrinsic | |
4094 | && !gfc_intrinsic_actual_ok (proc_if->name, 0)) | |
4095 | { | |
4096 | gfc_error ("Intrinsic procedure '%s' not allowed " | |
4097 | "in PROCEDURE statement at %C", proc_if->name); | |
4098 | return MATCH_ERROR; | |
4099 | } | |
af1a34ee | 4100 | } |
4101 | ||
4102 | got_ts: | |
af1a34ee | 4103 | if (gfc_match (" )") != MATCH_YES) |
4104 | { | |
4105 | gfc_current_locus = entry_loc; | |
4106 | return MATCH_NO; | |
4107 | } | |
4108 | ||
4109 | /* Parse attributes. */ | |
4110 | m = match_attr_spec(); | |
4111 | if (m == MATCH_ERROR) | |
4112 | return MATCH_ERROR; | |
4113 | ||
4114 | /* Get procedure symbols. */ | |
4115 | for(num=1;;num++) | |
4116 | { | |
af1a34ee | 4117 | m = gfc_match_symbol (&sym, 0); |
4118 | if (m == MATCH_NO) | |
4119 | goto syntax; | |
4120 | else if (m == MATCH_ERROR) | |
4121 | return m; | |
4122 | ||
4123 | /* Add current_attr to the symbol attributes. */ | |
4124 | if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
4125 | return MATCH_ERROR; | |
4126 | ||
4127 | if (sym->attr.is_bind_c) | |
4128 | { | |
4129 | /* Check for C1218. */ | |
4130 | if (!proc_if || !proc_if->attr.is_bind_c) | |
4131 | { | |
4132 | gfc_error ("BIND(C) attribute at %C requires " | |
4133 | "an interface with BIND(C)"); | |
4134 | return MATCH_ERROR; | |
4135 | } | |
4136 | /* Check for C1217. */ | |
4137 | if (has_name_equals && sym->attr.pointer) | |
4138 | { | |
4139 | gfc_error ("BIND(C) procedure with NAME may not have " | |
4140 | "POINTER attribute at %C"); | |
4141 | return MATCH_ERROR; | |
4142 | } | |
4143 | if (has_name_equals && sym->attr.dummy) | |
4144 | { | |
4145 | gfc_error ("Dummy procedure at %C may not have " | |
4146 | "BIND(C) attribute with NAME"); | |
4147 | return MATCH_ERROR; | |
4148 | } | |
4149 | /* Set binding label for BIND(C). */ | |
4150 | if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS) | |
4151 | return MATCH_ERROR; | |
4152 | } | |
4153 | ||
4154 | if (!sym->attr.pointer && gfc_add_external (&sym->attr, NULL) == FAILURE) | |
4155 | return MATCH_ERROR; | |
4156 | if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE) | |
4157 | return MATCH_ERROR; | |
4158 | ||
4159 | /* Set interface. */ | |
4160 | if (proc_if != NULL) | |
f7d7a083 | 4161 | { |
2cd2bb5c | 4162 | sym->ts.interface = proc_if; |
f7d7a083 | 4163 | sym->attr.untyped = 1; |
4164 | } | |
af1a34ee | 4165 | else if (current_ts.type != BT_UNKNOWN) |
4166 | { | |
2cd2bb5c | 4167 | sym->ts = current_ts; |
4168 | sym->ts.interface = gfc_new_symbol ("", gfc_current_ns); | |
4169 | sym->ts.interface->ts = current_ts; | |
4170 | sym->ts.interface->attr.function = 1; | |
4171 | sym->attr.function = sym->ts.interface->attr.function; | |
af1a34ee | 4172 | } |
4173 | ||
4174 | if (gfc_match_eos () == MATCH_YES) | |
4175 | return MATCH_YES; | |
4176 | if (gfc_match_char (',') != MATCH_YES) | |
4177 | goto syntax; | |
4178 | } | |
4179 | ||
4180 | syntax: | |
4181 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4182 | return MATCH_ERROR; | |
4183 | } | |
4184 | ||
4185 | ||
4186 | /* Match a PROCEDURE declaration inside an interface (R1206). */ | |
4187 | ||
4188 | static match | |
4189 | match_procedure_in_interface (void) | |
4190 | { | |
4191 | match m; | |
4192 | gfc_symbol *sym; | |
4193 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4194 | ||
4195 | if (current_interface.type == INTERFACE_NAMELESS | |
4196 | || current_interface.type == INTERFACE_ABSTRACT) | |
4197 | { | |
4198 | gfc_error ("PROCEDURE at %C must be in a generic interface"); | |
4199 | return MATCH_ERROR; | |
4200 | } | |
4201 | ||
4202 | for(;;) | |
4203 | { | |
4204 | m = gfc_match_name (name); | |
4205 | if (m == MATCH_NO) | |
4206 | goto syntax; | |
4207 | else if (m == MATCH_ERROR) | |
4208 | return m; | |
4209 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
4210 | return MATCH_ERROR; | |
4211 | ||
4212 | if (gfc_add_interface (sym) == FAILURE) | |
4213 | return MATCH_ERROR; | |
4214 | ||
af1a34ee | 4215 | if (gfc_match_eos () == MATCH_YES) |
4216 | break; | |
4217 | if (gfc_match_char (',') != MATCH_YES) | |
4218 | goto syntax; | |
4219 | } | |
4220 | ||
4221 | return MATCH_YES; | |
4222 | ||
4223 | syntax: | |
4224 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4225 | return MATCH_ERROR; | |
4226 | } | |
4227 | ||
4228 | ||
4229 | /* General matcher for PROCEDURE declarations. */ | |
4230 | ||
4231 | match | |
4232 | gfc_match_procedure (void) | |
4233 | { | |
4234 | match m; | |
4235 | ||
4236 | switch (gfc_current_state ()) | |
4237 | { | |
4238 | case COMP_NONE: | |
4239 | case COMP_PROGRAM: | |
4240 | case COMP_MODULE: | |
4241 | case COMP_SUBROUTINE: | |
4242 | case COMP_FUNCTION: | |
4243 | m = match_procedure_decl (); | |
4244 | break; | |
4245 | case COMP_INTERFACE: | |
4246 | m = match_procedure_in_interface (); | |
4247 | break; | |
4248 | case COMP_DERIVED: | |
4249 | gfc_error ("Fortran 2003: Procedure components at %C are " | |
4250 | "not yet implemented in gfortran"); | |
4251 | return MATCH_ERROR; | |
4252 | default: | |
4253 | return MATCH_NO; | |
4254 | } | |
4255 | ||
4256 | if (m != MATCH_YES) | |
4257 | return m; | |
4258 | ||
4259 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C") | |
4260 | == FAILURE) | |
4261 | return MATCH_ERROR; | |
4262 | ||
4263 | return m; | |
4264 | } | |
4265 | ||
4266 | ||
4ee9c684 | 4267 | /* Match a function declaration. */ |
4268 | ||
4269 | match | |
4270 | gfc_match_function_decl (void) | |
4271 | { | |
4272 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4273 | gfc_symbol *sym, *result; | |
4274 | locus old_loc; | |
4275 | match m; | |
c5d33754 | 4276 | match suffix_match; |
4277 | match found_match; /* Status returned by match func. */ | |
4ee9c684 | 4278 | |
4279 | if (gfc_current_state () != COMP_NONE | |
4280 | && gfc_current_state () != COMP_INTERFACE | |
4281 | && gfc_current_state () != COMP_CONTAINS) | |
4282 | return MATCH_NO; | |
4283 | ||
4284 | gfc_clear_ts (¤t_ts); | |
4285 | ||
cbb9e6aa | 4286 | old_loc = gfc_current_locus; |
4ee9c684 | 4287 | |
077932f9 | 4288 | m = gfc_match_prefix (¤t_ts); |
4ee9c684 | 4289 | if (m != MATCH_YES) |
4290 | { | |
cbb9e6aa | 4291 | gfc_current_locus = old_loc; |
4ee9c684 | 4292 | return m; |
4293 | } | |
4294 | ||
4295 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
4296 | { | |
cbb9e6aa | 4297 | gfc_current_locus = old_loc; |
4ee9c684 | 4298 | return MATCH_NO; |
4299 | } | |
d77f260f | 4300 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 4301 | return MATCH_ERROR; |
4302 | gfc_new_block = sym; | |
4303 | ||
4304 | m = gfc_match_formal_arglist (sym, 0, 0); | |
4305 | if (m == MATCH_NO) | |
9b435b6d | 4306 | { |
4307 | gfc_error ("Expected formal argument list in function " | |
1a9745d2 | 4308 | "definition at %C"); |
9b435b6d | 4309 | m = MATCH_ERROR; |
4310 | goto cleanup; | |
4311 | } | |
4ee9c684 | 4312 | else if (m == MATCH_ERROR) |
4313 | goto cleanup; | |
4314 | ||
4315 | result = NULL; | |
4316 | ||
c5d33754 | 4317 | /* According to the draft, the bind(c) and result clause can |
4318 | come in either order after the formal_arg_list (i.e., either | |
4319 | can be first, both can exist together or by themselves or neither | |
4320 | one). Therefore, the match_result can't match the end of the | |
4321 | string, and check for the bind(c) or result clause in either order. */ | |
4322 | found_match = gfc_match_eos (); | |
4323 | ||
4324 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
4325 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4326 | not allowed for procedures. */ | |
4327 | if (sym->attr.is_bind_c == 1) | |
4328 | { | |
4329 | sym->attr.is_bind_c = 0; | |
4330 | if (sym->old_symbol != NULL) | |
4331 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4332 | "variables or common blocks", | |
4333 | &(sym->old_symbol->declared_at)); | |
4334 | else | |
4335 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4336 | "variables or common blocks", &gfc_current_locus); | |
4ee9c684 | 4337 | } |
4338 | ||
c5d33754 | 4339 | if (found_match != MATCH_YES) |
4ee9c684 | 4340 | { |
c5d33754 | 4341 | /* If we haven't found the end-of-statement, look for a suffix. */ |
4342 | suffix_match = gfc_match_suffix (sym, &result); | |
4343 | if (suffix_match == MATCH_YES) | |
4344 | /* Need to get the eos now. */ | |
4345 | found_match = gfc_match_eos (); | |
4346 | else | |
4347 | found_match = suffix_match; | |
4ee9c684 | 4348 | } |
4349 | ||
c5d33754 | 4350 | if(found_match != MATCH_YES) |
4351 | m = MATCH_ERROR; | |
4ee9c684 | 4352 | else |
4353 | { | |
c5d33754 | 4354 | /* Make changes to the symbol. */ |
4355 | m = MATCH_ERROR; | |
4356 | ||
4357 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) | |
4358 | goto cleanup; | |
4359 | ||
4360 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
4361 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4362 | goto cleanup; | |
4ee9c684 | 4363 | |
c5d33754 | 4364 | if (current_ts.type != BT_UNKNOWN && sym->ts.type != BT_UNKNOWN |
4365 | && !sym->attr.implicit_type) | |
4366 | { | |
4367 | gfc_error ("Function '%s' at %C already has a type of %s", name, | |
4368 | gfc_basic_typename (sym->ts.type)); | |
4369 | goto cleanup; | |
4370 | } | |
4371 | ||
8d39570e | 4372 | /* Delay matching the function characteristics until after the |
077932f9 | 4373 | specification block by signalling kind=-1. */ |
8d39570e | 4374 | sym->declared_at = old_loc; |
4375 | if (current_ts.type != BT_UNKNOWN) | |
4376 | current_ts.kind = -1; | |
4377 | else | |
4378 | current_ts.kind = 0; | |
077932f9 | 4379 | |
c5d33754 | 4380 | if (result == NULL) |
4381 | { | |
4382 | sym->ts = current_ts; | |
4383 | sym->result = sym; | |
4384 | } | |
4385 | else | |
4386 | { | |
4387 | result->ts = current_ts; | |
4388 | sym->result = result; | |
4389 | } | |
4390 | ||
4391 | return MATCH_YES; | |
4392 | } | |
4ee9c684 | 4393 | |
4394 | cleanup: | |
cbb9e6aa | 4395 | gfc_current_locus = old_loc; |
4ee9c684 | 4396 | return m; |
4397 | } | |
4398 | ||
1a9745d2 | 4399 | |
4400 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
4401 | pass the name of the entry, rather than the gfc_current_block name, and | |
4402 | to return false upon finding an existing global entry. */ | |
858f9894 | 4403 | |
4404 | static bool | |
1a9745d2 | 4405 | add_global_entry (const char *name, int sub) |
858f9894 | 4406 | { |
4407 | gfc_gsymbol *s; | |
15d92c0c | 4408 | unsigned int type; |
858f9894 | 4409 | |
4410 | s = gfc_get_gsymbol(name); | |
5b11d932 | 4411 | type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; |
858f9894 | 4412 | |
4413 | if (s->defined | |
1a9745d2 | 4414 | || (s->type != GSYM_UNKNOWN |
5b11d932 | 4415 | && s->type != type)) |
cbbac028 | 4416 | gfc_global_used(s, NULL); |
858f9894 | 4417 | else |
4418 | { | |
5b11d932 | 4419 | s->type = type; |
858f9894 | 4420 | s->where = gfc_current_locus; |
4421 | s->defined = 1; | |
4422 | return true; | |
4423 | } | |
4424 | return false; | |
4425 | } | |
4ee9c684 | 4426 | |
1a9745d2 | 4427 | |
4ee9c684 | 4428 | /* Match an ENTRY statement. */ |
4429 | ||
4430 | match | |
4431 | gfc_match_entry (void) | |
4432 | { | |
1b716045 | 4433 | gfc_symbol *proc; |
4434 | gfc_symbol *result; | |
4435 | gfc_symbol *entry; | |
4ee9c684 | 4436 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
4437 | gfc_compile_state state; | |
4438 | match m; | |
1b716045 | 4439 | gfc_entry_list *el; |
7b5e1acc | 4440 | locus old_loc; |
d77f260f | 4441 | bool module_procedure; |
86f0974b | 4442 | char peek_char; |
4443 | match is_bind_c; | |
4ee9c684 | 4444 | |
4445 | m = gfc_match_name (name); | |
4446 | if (m != MATCH_YES) | |
4447 | return m; | |
4448 | ||
1b716045 | 4449 | state = gfc_current_state (); |
ea37f786 | 4450 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
1b716045 | 4451 | { |
ea37f786 | 4452 | switch (state) |
4453 | { | |
4454 | case COMP_PROGRAM: | |
4455 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
4456 | break; | |
4457 | case COMP_MODULE: | |
4458 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
4459 | break; | |
4460 | case COMP_BLOCK_DATA: | |
1a9745d2 | 4461 | gfc_error ("ENTRY statement at %C cannot appear within " |
4462 | "a BLOCK DATA"); | |
ea37f786 | 4463 | break; |
4464 | case COMP_INTERFACE: | |
1a9745d2 | 4465 | gfc_error ("ENTRY statement at %C cannot appear within " |
4466 | "an INTERFACE"); | |
ea37f786 | 4467 | break; |
4468 | case COMP_DERIVED: | |
1a9745d2 | 4469 | gfc_error ("ENTRY statement at %C cannot appear within " |
4470 | "a DERIVED TYPE block"); | |
ea37f786 | 4471 | break; |
4472 | case COMP_IF: | |
1a9745d2 | 4473 | gfc_error ("ENTRY statement at %C cannot appear within " |
4474 | "an IF-THEN block"); | |
ea37f786 | 4475 | break; |
4476 | case COMP_DO: | |
1a9745d2 | 4477 | gfc_error ("ENTRY statement at %C cannot appear within " |
4478 | "a DO block"); | |
ea37f786 | 4479 | break; |
4480 | case COMP_SELECT: | |
1a9745d2 | 4481 | gfc_error ("ENTRY statement at %C cannot appear within " |
4482 | "a SELECT block"); | |
ea37f786 | 4483 | break; |
4484 | case COMP_FORALL: | |
1a9745d2 | 4485 | gfc_error ("ENTRY statement at %C cannot appear within " |
4486 | "a FORALL block"); | |
ea37f786 | 4487 | break; |
4488 | case COMP_WHERE: | |
1a9745d2 | 4489 | gfc_error ("ENTRY statement at %C cannot appear within " |
4490 | "a WHERE block"); | |
ea37f786 | 4491 | break; |
4492 | case COMP_CONTAINS: | |
1a9745d2 | 4493 | gfc_error ("ENTRY statement at %C cannot appear within " |
4494 | "a contained subprogram"); | |
ea37f786 | 4495 | break; |
4496 | default: | |
4497 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
4498 | } | |
1b716045 | 4499 | return MATCH_ERROR; |
4500 | } | |
4501 | ||
d77f260f | 4502 | module_procedure = gfc_current_ns->parent != NULL |
1a9745d2 | 4503 | && gfc_current_ns->parent->proc_name |
4504 | && gfc_current_ns->parent->proc_name->attr.flavor | |
4505 | == FL_MODULE; | |
d77f260f | 4506 | |
1b716045 | 4507 | if (gfc_current_ns->parent != NULL |
4508 | && gfc_current_ns->parent->proc_name | |
d77f260f | 4509 | && !module_procedure) |
1b716045 | 4510 | { |
4511 | gfc_error("ENTRY statement at %C cannot appear in a " | |
4512 | "contained procedure"); | |
4513 | return MATCH_ERROR; | |
4514 | } | |
4515 | ||
d77f260f | 4516 | /* Module function entries need special care in get_proc_name |
4517 | because previous references within the function will have | |
4518 | created symbols attached to the current namespace. */ | |
4519 | if (get_proc_name (name, &entry, | |
4520 | gfc_current_ns->parent != NULL | |
4521 | && module_procedure | |
4522 | && gfc_current_ns->proc_name->attr.function)) | |
4ee9c684 | 4523 | return MATCH_ERROR; |
4524 | ||
1b716045 | 4525 | proc = gfc_current_block (); |
4526 | ||
86f0974b | 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 (entry->attr.is_bind_c == 1) | |
4531 | { | |
4532 | entry->attr.is_bind_c = 0; | |
4533 | if (entry->old_symbol != NULL) | |
4534 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4535 | "variables or common blocks", | |
4536 | &(entry->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 | /* Check what next non-whitespace character is so we can tell if there | |
4543 | is the required parens if we have a BIND(C). */ | |
4544 | gfc_gobble_whitespace (); | |
e0be6f02 | 4545 | peek_char = gfc_peek_ascii_char (); |
86f0974b | 4546 | |
1b716045 | 4547 | if (state == COMP_SUBROUTINE) |
4ee9c684 | 4548 | { |
950683ed | 4549 | /* An entry in a subroutine. */ |
8cafc742 | 4550 | if (!gfc_current_ns->parent && !add_global_entry (name, 1)) |
858f9894 | 4551 | return MATCH_ERROR; |
4552 | ||
4ee9c684 | 4553 | m = gfc_match_formal_arglist (entry, 0, 1); |
4554 | if (m != MATCH_YES) | |
4555 | return MATCH_ERROR; | |
4556 | ||
75ae7f6c | 4557 | /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can |
4558 | never be an internal procedure. */ | |
4559 | is_bind_c = gfc_match_bind_c (entry, true); | |
86f0974b | 4560 | if (is_bind_c == MATCH_ERROR) |
4561 | return MATCH_ERROR; | |
4562 | if (is_bind_c == MATCH_YES) | |
4563 | { | |
4564 | if (peek_char != '(') | |
4565 | { | |
4566 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
4567 | return MATCH_ERROR; | |
4568 | } | |
4569 | if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1) | |
4570 | == FAILURE) | |
4571 | return MATCH_ERROR; | |
4572 | } | |
4573 | ||
950683ed | 4574 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4575 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 4576 | return MATCH_ERROR; |
1b716045 | 4577 | } |
4578 | else | |
4579 | { | |
7b5e1acc | 4580 | /* An entry in a function. |
1a9745d2 | 4581 | We need to take special care because writing |
4582 | ENTRY f() | |
4583 | as | |
4584 | ENTRY f | |
4585 | is allowed, whereas | |
4586 | ENTRY f() RESULT (r) | |
4587 | can't be written as | |
4588 | ENTRY f RESULT (r). */ | |
8cafc742 | 4589 | if (!gfc_current_ns->parent && !add_global_entry (name, 0)) |
858f9894 | 4590 | return MATCH_ERROR; |
4591 | ||
7b5e1acc | 4592 | old_loc = gfc_current_locus; |
4593 | if (gfc_match_eos () == MATCH_YES) | |
4594 | { | |
4595 | gfc_current_locus = old_loc; | |
4596 | /* Match the empty argument list, and add the interface to | |
4597 | the symbol. */ | |
4598 | m = gfc_match_formal_arglist (entry, 0, 1); | |
4599 | } | |
4600 | else | |
4601 | m = gfc_match_formal_arglist (entry, 0, 0); | |
4602 | ||
4ee9c684 | 4603 | if (m != MATCH_YES) |
4604 | return MATCH_ERROR; | |
4605 | ||
4ee9c684 | 4606 | result = NULL; |
4607 | ||
4608 | if (gfc_match_eos () == MATCH_YES) | |
4609 | { | |
950683ed | 4610 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4611 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 4612 | return MATCH_ERROR; |
4613 | ||
c6871095 | 4614 | entry->result = entry; |
4ee9c684 | 4615 | } |
4616 | else | |
4617 | { | |
86f0974b | 4618 | m = gfc_match_suffix (entry, &result); |
4ee9c684 | 4619 | if (m == MATCH_NO) |
4620 | gfc_syntax_error (ST_ENTRY); | |
4621 | if (m != MATCH_YES) | |
4622 | return MATCH_ERROR; | |
4623 | ||
86f0974b | 4624 | if (result) |
4625 | { | |
4626 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE | |
4627 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
4628 | || gfc_add_function (&entry->attr, result->name, NULL) | |
4629 | == FAILURE) | |
4630 | return MATCH_ERROR; | |
4631 | entry->result = result; | |
4632 | } | |
4633 | else | |
4634 | { | |
4635 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE | |
4636 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
4637 | return MATCH_ERROR; | |
4638 | entry->result = entry; | |
4639 | } | |
4ee9c684 | 4640 | } |
4ee9c684 | 4641 | } |
4642 | ||
4643 | if (gfc_match_eos () != MATCH_YES) | |
4644 | { | |
4645 | gfc_syntax_error (ST_ENTRY); | |
4646 | return MATCH_ERROR; | |
4647 | } | |
4648 | ||
1b716045 | 4649 | entry->attr.recursive = proc->attr.recursive; |
4650 | entry->attr.elemental = proc->attr.elemental; | |
4651 | entry->attr.pure = proc->attr.pure; | |
4ee9c684 | 4652 | |
1b716045 | 4653 | el = gfc_get_entry_list (); |
4654 | el->sym = entry; | |
4655 | el->next = gfc_current_ns->entries; | |
4656 | gfc_current_ns->entries = el; | |
4657 | if (el->next) | |
4658 | el->id = el->next->id + 1; | |
4659 | else | |
4660 | el->id = 1; | |
4ee9c684 | 4661 | |
1b716045 | 4662 | new_st.op = EXEC_ENTRY; |
4663 | new_st.ext.entry = el; | |
4664 | ||
4665 | return MATCH_YES; | |
4ee9c684 | 4666 | } |
4667 | ||
4668 | ||
4669 | /* Match a subroutine statement, including optional prefixes. */ | |
4670 | ||
4671 | match | |
4672 | gfc_match_subroutine (void) | |
4673 | { | |
4674 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4675 | gfc_symbol *sym; | |
4676 | match m; | |
c5d33754 | 4677 | match is_bind_c; |
4678 | char peek_char; | |
75ae7f6c | 4679 | bool allow_binding_name; |
4ee9c684 | 4680 | |
4681 | if (gfc_current_state () != COMP_NONE | |
4682 | && gfc_current_state () != COMP_INTERFACE | |
4683 | && gfc_current_state () != COMP_CONTAINS) | |
4684 | return MATCH_NO; | |
4685 | ||
077932f9 | 4686 | m = gfc_match_prefix (NULL); |
4ee9c684 | 4687 | if (m != MATCH_YES) |
4688 | return m; | |
4689 | ||
4690 | m = gfc_match ("subroutine% %n", name); | |
4691 | if (m != MATCH_YES) | |
4692 | return m; | |
4693 | ||
d77f260f | 4694 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 4695 | return MATCH_ERROR; |
4696 | gfc_new_block = sym; | |
4697 | ||
c5d33754 | 4698 | /* Check what next non-whitespace character is so we can tell if there |
86f0974b | 4699 | is the required parens if we have a BIND(C). */ |
c5d33754 | 4700 | gfc_gobble_whitespace (); |
e0be6f02 | 4701 | peek_char = gfc_peek_ascii_char (); |
c5d33754 | 4702 | |
950683ed | 4703 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
4ee9c684 | 4704 | return MATCH_ERROR; |
4705 | ||
4706 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
4707 | return MATCH_ERROR; | |
4708 | ||
c5d33754 | 4709 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
4710 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4711 | not allowed for procedures. */ | |
4712 | if (sym->attr.is_bind_c == 1) | |
4713 | { | |
4714 | sym->attr.is_bind_c = 0; | |
4715 | if (sym->old_symbol != NULL) | |
4716 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4717 | "variables or common blocks", | |
4718 | &(sym->old_symbol->declared_at)); | |
4719 | else | |
4720 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4721 | "variables or common blocks", &gfc_current_locus); | |
4722 | } | |
75ae7f6c | 4723 | |
4724 | /* C binding names are not allowed for internal procedures. */ | |
4725 | if (gfc_current_state () == COMP_CONTAINS | |
4726 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
4727 | allow_binding_name = false; | |
4728 | else | |
4729 | allow_binding_name = true; | |
4730 | ||
c5d33754 | 4731 | /* Here, we are just checking if it has the bind(c) attribute, and if |
4732 | so, then we need to make sure it's all correct. If it doesn't, | |
4733 | we still need to continue matching the rest of the subroutine line. */ | |
75ae7f6c | 4734 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 4735 | if (is_bind_c == MATCH_ERROR) |
4736 | { | |
4737 | /* There was an attempt at the bind(c), but it was wrong. An | |
4738 | error message should have been printed w/in the gfc_match_bind_c | |
4739 | so here we'll just return the MATCH_ERROR. */ | |
4740 | return MATCH_ERROR; | |
4741 | } | |
4742 | ||
4743 | if (is_bind_c == MATCH_YES) | |
4744 | { | |
75ae7f6c | 4745 | /* The following is allowed in the Fortran 2008 draft. */ |
4518e961 | 4746 | if (gfc_current_state () == COMP_CONTAINS |
75ae7f6c | 4747 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
2dcae6c7 | 4748 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
4749 | "at %L may not be specified for an internal " | |
4750 | "procedure", &gfc_current_locus) | |
75ae7f6c | 4751 | == FAILURE) |
4752 | return MATCH_ERROR; | |
4753 | ||
c5d33754 | 4754 | if (peek_char != '(') |
4755 | { | |
4756 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
4757 | return MATCH_ERROR; | |
4758 | } | |
4759 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) | |
4760 | == FAILURE) | |
4761 | return MATCH_ERROR; | |
4762 | } | |
4763 | ||
4ee9c684 | 4764 | if (gfc_match_eos () != MATCH_YES) |
4765 | { | |
4766 | gfc_syntax_error (ST_SUBROUTINE); | |
4767 | return MATCH_ERROR; | |
4768 | } | |
4769 | ||
4770 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4771 | return MATCH_ERROR; | |
4772 | ||
4773 | return MATCH_YES; | |
4774 | } | |
4775 | ||
4776 | ||
c5d33754 | 4777 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
4778 | given, and set the binding label in either the given symbol (if not | |
a0527218 | 4779 | NULL), or in the current_ts. The symbol may be NULL because we may |
c5d33754 | 4780 | encounter the BIND(C) before the declaration itself. Return |
4781 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, | |
4782 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, | |
4783 | or MATCH_YES if the specifier was correct and the binding label and | |
4784 | bind(c) fields were set correctly for the given symbol or the | |
75ae7f6c | 4785 | current_ts. If allow_binding_name is false, no binding name may be |
4786 | given. */ | |
c5d33754 | 4787 | |
4788 | match | |
75ae7f6c | 4789 | gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name) |
c5d33754 | 4790 | { |
4791 | /* binding label, if exists */ | |
4792 | char binding_label[GFC_MAX_SYMBOL_LEN + 1]; | |
4793 | match double_quote; | |
4794 | match single_quote; | |
c5d33754 | 4795 | |
4796 | /* Initialize the flag that specifies whether we encountered a NAME= | |
4797 | specifier or not. */ | |
4798 | has_name_equals = 0; | |
4799 | ||
4800 | /* Init the first char to nil so we can catch if we don't have | |
4801 | the label (name attr) or the symbol name yet. */ | |
4802 | binding_label[0] = '\0'; | |
4803 | ||
4804 | /* This much we have to be able to match, in this order, if | |
4805 | there is a bind(c) label. */ | |
4806 | if (gfc_match (" bind ( c ") != MATCH_YES) | |
4807 | return MATCH_NO; | |
4808 | ||
4809 | /* Now see if there is a binding label, or if we've reached the | |
4810 | end of the bind(c) attribute without one. */ | |
4811 | if (gfc_match_char (',') == MATCH_YES) | |
4812 | { | |
4813 | if (gfc_match (" name = ") != MATCH_YES) | |
4814 | { | |
4815 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
4816 | "at %C"); | |
4817 | /* should give an error message here */ | |
4818 | return MATCH_ERROR; | |
4819 | } | |
4820 | ||
4821 | has_name_equals = 1; | |
4822 | ||
4823 | /* Get the opening quote. */ | |
4824 | double_quote = MATCH_YES; | |
4825 | single_quote = MATCH_YES; | |
4826 | double_quote = gfc_match_char ('"'); | |
4827 | if (double_quote != MATCH_YES) | |
4828 | single_quote = gfc_match_char ('\''); | |
4829 | if (double_quote != MATCH_YES && single_quote != MATCH_YES) | |
4830 | { | |
4831 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
4832 | "at %C"); | |
4833 | return MATCH_ERROR; | |
4834 | } | |
4835 | ||
4836 | /* Grab the binding label, using functions that will not lower | |
4837 | case the names automatically. */ | |
4838 | if (gfc_match_name_C (binding_label) != MATCH_YES) | |
4839 | return MATCH_ERROR; | |
4840 | ||
4841 | /* Get the closing quotation. */ | |
4842 | if (double_quote == MATCH_YES) | |
4843 | { | |
4844 | if (gfc_match_char ('"') != MATCH_YES) | |
4845 | { | |
4846 | gfc_error ("Missing closing quote '\"' for binding label at %C"); | |
4847 | /* User started string with '"' so looked to match it. */ | |
4848 | return MATCH_ERROR; | |
4849 | } | |
4850 | } | |
4851 | else | |
4852 | { | |
4853 | if (gfc_match_char ('\'') != MATCH_YES) | |
4854 | { | |
4855 | gfc_error ("Missing closing quote '\'' for binding label at %C"); | |
4856 | /* User started string with "'" char. */ | |
4857 | return MATCH_ERROR; | |
4858 | } | |
4859 | } | |
4860 | } | |
4861 | ||
4862 | /* Get the required right paren. */ | |
4863 | if (gfc_match_char (')') != MATCH_YES) | |
4864 | { | |
4865 | gfc_error ("Missing closing paren for binding label at %C"); | |
4866 | return MATCH_ERROR; | |
4867 | } | |
4868 | ||
75ae7f6c | 4869 | if (has_name_equals && !allow_binding_name) |
4870 | { | |
4871 | gfc_error ("No binding name is allowed in BIND(C) at %C"); | |
4872 | return MATCH_ERROR; | |
4873 | } | |
4874 | ||
4875 | if (has_name_equals && sym != NULL && sym->attr.dummy) | |
4876 | { | |
4877 | gfc_error ("For dummy procedure %s, no binding name is " | |
4878 | "allowed in BIND(C) at %C", sym->name); | |
4879 | return MATCH_ERROR; | |
4880 | } | |
4881 | ||
4882 | ||
c5d33754 | 4883 | /* Save the binding label to the symbol. If sym is null, we're |
4884 | probably matching the typespec attributes of a declaration and | |
4885 | haven't gotten the name yet, and therefore, no symbol yet. */ | |
4886 | if (binding_label[0] != '\0') | |
4887 | { | |
4888 | if (sym != NULL) | |
4889 | { | |
b1223b39 | 4890 | strcpy (sym->binding_label, binding_label); |
c5d33754 | 4891 | } |
4892 | else | |
b1223b39 | 4893 | strcpy (curr_binding_label, binding_label); |
c5d33754 | 4894 | } |
75ae7f6c | 4895 | else if (allow_binding_name) |
c5d33754 | 4896 | { |
4897 | /* No binding label, but if symbol isn't null, we | |
75ae7f6c | 4898 | can set the label for it here. |
4899 | If name="" or allow_binding_name is false, no C binding name is | |
4900 | created. */ | |
c5d33754 | 4901 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) |
4902 | strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1); | |
4903 | } | |
94fa7146 | 4904 | |
5cf92482 | 4905 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
4906 | && current_interface.type == INTERFACE_ABSTRACT) | |
94fa7146 | 4907 | { |
4908 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); | |
4909 | return MATCH_ERROR; | |
4910 | } | |
4911 | ||
c5d33754 | 4912 | return MATCH_YES; |
4913 | } | |
4914 | ||
4915 | ||
231e961a | 4916 | /* Return nonzero if we're currently compiling a contained procedure. */ |
c0985832 | 4917 | |
4918 | static int | |
4919 | contained_procedure (void) | |
4920 | { | |
1c343287 | 4921 | gfc_state_data *s = gfc_state_stack; |
c0985832 | 4922 | |
1c343287 | 4923 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) |
4924 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) | |
4925 | return 1; | |
c0985832 | 4926 | |
4927 | return 0; | |
4928 | } | |
4929 | ||
e14bee04 | 4930 | /* Set the kind of each enumerator. The kind is selected such that it is |
3b6a4b41 | 4931 | interoperable with the corresponding C enumeration type, making |
4932 | sure that -fshort-enums is honored. */ | |
4933 | ||
4934 | static void | |
4935 | set_enum_kind(void) | |
4936 | { | |
4937 | enumerator_history *current_history = NULL; | |
4938 | int kind; | |
4939 | int i; | |
4940 | ||
4941 | if (max_enum == NULL || enum_history == NULL) | |
4942 | return; | |
4943 | ||
4944 | if (!gfc_option.fshort_enums) | |
e14bee04 | 4945 | return; |
4946 | ||
3b6a4b41 | 4947 | i = 0; |
4948 | do | |
4949 | { | |
4950 | kind = gfc_integer_kinds[i++].kind; | |
4951 | } | |
e14bee04 | 4952 | while (kind < gfc_c_int_kind |
3b6a4b41 | 4953 | && gfc_check_integer_range (max_enum->initializer->value.integer, |
4954 | kind) != ARITH_OK); | |
4955 | ||
4956 | current_history = enum_history; | |
4957 | while (current_history != NULL) | |
4958 | { | |
4959 | current_history->sym->ts.kind = kind; | |
4960 | current_history = current_history->next; | |
4961 | } | |
4962 | } | |
4963 | ||
1a9745d2 | 4964 | |
4ee9c684 | 4965 | /* Match any of the various end-block statements. Returns the type of |
4966 | END to the caller. The END INTERFACE, END IF, END DO and END | |
4967 | SELECT statements cannot be replaced by a single END statement. */ | |
4968 | ||
4969 | match | |
1a9745d2 | 4970 | gfc_match_end (gfc_statement *st) |
4ee9c684 | 4971 | { |
4972 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4973 | gfc_compile_state state; | |
4974 | locus old_loc; | |
4975 | const char *block_name; | |
4976 | const char *target; | |
c0985832 | 4977 | int eos_ok; |
4ee9c684 | 4978 | match m; |
4979 | ||
cbb9e6aa | 4980 | old_loc = gfc_current_locus; |
4ee9c684 | 4981 | if (gfc_match ("end") != MATCH_YES) |
4982 | return MATCH_NO; | |
4983 | ||
4984 | state = gfc_current_state (); | |
1a9745d2 | 4985 | block_name = gfc_current_block () == NULL |
4986 | ? NULL : gfc_current_block ()->name; | |
4ee9c684 | 4987 | |
4988 | if (state == COMP_CONTAINS) | |
4989 | { | |
4990 | state = gfc_state_stack->previous->state; | |
1a9745d2 | 4991 | block_name = gfc_state_stack->previous->sym == NULL |
4992 | ? NULL : gfc_state_stack->previous->sym->name; | |
4ee9c684 | 4993 | } |
4994 | ||
4995 | switch (state) | |
4996 | { | |
4997 | case COMP_NONE: | |
4998 | case COMP_PROGRAM: | |
4999 | *st = ST_END_PROGRAM; | |
5000 | target = " program"; | |
c0985832 | 5001 | eos_ok = 1; |
4ee9c684 | 5002 | break; |
5003 | ||
5004 | case COMP_SUBROUTINE: | |
5005 | *st = ST_END_SUBROUTINE; | |
5006 | target = " subroutine"; | |
c0985832 | 5007 | eos_ok = !contained_procedure (); |
4ee9c684 | 5008 | break; |
5009 | ||
5010 | case COMP_FUNCTION: | |
5011 | *st = ST_END_FUNCTION; | |
5012 | target = " function"; | |
c0985832 | 5013 | eos_ok = !contained_procedure (); |
4ee9c684 | 5014 | break; |
5015 | ||
5016 | case COMP_BLOCK_DATA: | |
5017 | *st = ST_END_BLOCK_DATA; | |
5018 | target = " block data"; | |
c0985832 | 5019 | eos_ok = 1; |
4ee9c684 | 5020 | break; |
5021 | ||
5022 | case COMP_MODULE: | |
5023 | *st = ST_END_MODULE; | |
5024 | target = " module"; | |
c0985832 | 5025 | eos_ok = 1; |
4ee9c684 | 5026 | break; |
5027 | ||
5028 | case COMP_INTERFACE: | |
5029 | *st = ST_END_INTERFACE; | |
5030 | target = " interface"; | |
c0985832 | 5031 | eos_ok = 0; |
4ee9c684 | 5032 | break; |
5033 | ||
5034 | case COMP_DERIVED: | |
5035 | *st = ST_END_TYPE; | |
5036 | target = " type"; | |
c0985832 | 5037 | eos_ok = 0; |
4ee9c684 | 5038 | break; |
5039 | ||
5040 | case COMP_IF: | |
5041 | *st = ST_ENDIF; | |
5042 | target = " if"; | |
c0985832 | 5043 | eos_ok = 0; |
4ee9c684 | 5044 | break; |
5045 | ||
5046 | case COMP_DO: | |
5047 | *st = ST_ENDDO; | |
5048 | target = " do"; | |
c0985832 | 5049 | eos_ok = 0; |
4ee9c684 | 5050 | break; |
5051 | ||
5052 | case COMP_SELECT: | |
5053 | *st = ST_END_SELECT; | |
5054 | target = " select"; | |
c0985832 | 5055 | eos_ok = 0; |
4ee9c684 | 5056 | break; |
5057 | ||
5058 | case COMP_FORALL: | |
5059 | *st = ST_END_FORALL; | |
5060 | target = " forall"; | |
c0985832 | 5061 | eos_ok = 0; |
4ee9c684 | 5062 | break; |
5063 | ||
5064 | case COMP_WHERE: | |
5065 | *st = ST_END_WHERE; | |
5066 | target = " where"; | |
c0985832 | 5067 | eos_ok = 0; |
4ee9c684 | 5068 | break; |
5069 | ||
3b6a4b41 | 5070 | case COMP_ENUM: |
5071 | *st = ST_END_ENUM; | |
5072 | target = " enum"; | |
5073 | eos_ok = 0; | |
5074 | last_initializer = NULL; | |
5075 | set_enum_kind (); | |
5076 | gfc_free_enum_history (); | |
5077 | break; | |
5078 | ||
4ee9c684 | 5079 | default: |
5080 | gfc_error ("Unexpected END statement at %C"); | |
5081 | goto cleanup; | |
5082 | } | |
5083 | ||
5084 | if (gfc_match_eos () == MATCH_YES) | |
5085 | { | |
c0985832 | 5086 | if (!eos_ok) |
4ee9c684 | 5087 | { |
f6d0e37a | 5088 | /* We would have required END [something]. */ |
d197c9ee | 5089 | gfc_error ("%s statement expected at %L", |
5090 | gfc_ascii_statement (*st), &old_loc); | |
4ee9c684 | 5091 | goto cleanup; |
5092 | } | |
5093 | ||
5094 | return MATCH_YES; | |
5095 | } | |
5096 | ||
5097 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
5098 | if (gfc_match (target) != MATCH_YES) | |
5099 | { | |
5100 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
5101 | goto cleanup; | |
5102 | } | |
5103 | ||
5104 | /* If we're at the end, make sure a block name wasn't required. */ | |
5105 | if (gfc_match_eos () == MATCH_YES) | |
5106 | { | |
5107 | ||
0d0ce415 | 5108 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT |
5109 | && *st != ST_END_FORALL && *st != ST_END_WHERE) | |
4ee9c684 | 5110 | return MATCH_YES; |
5111 | ||
5112 | if (gfc_current_block () == NULL) | |
5113 | return MATCH_YES; | |
5114 | ||
5115 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
5116 | block_name, gfc_ascii_statement (*st)); | |
5117 | ||
5118 | return MATCH_ERROR; | |
5119 | } | |
5120 | ||
5121 | /* END INTERFACE has a special handler for its several possible endings. */ | |
5122 | if (*st == ST_END_INTERFACE) | |
5123 | return gfc_match_end_interface (); | |
5124 | ||
f6d0e37a | 5125 | /* We haven't hit the end of statement, so what is left must be an |
5126 | end-name. */ | |
4ee9c684 | 5127 | m = gfc_match_space (); |
5128 | if (m == MATCH_YES) | |
5129 | m = gfc_match_name (name); | |
5130 | ||
5131 | if (m == MATCH_NO) | |
5132 | gfc_error ("Expected terminating name at %C"); | |
5133 | if (m != MATCH_YES) | |
5134 | goto cleanup; | |
5135 | ||
5136 | if (block_name == NULL) | |
5137 | goto syntax; | |
5138 | ||
5139 | if (strcmp (name, block_name) != 0) | |
5140 | { | |
5141 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
5142 | gfc_ascii_statement (*st)); | |
5143 | goto cleanup; | |
5144 | } | |
5145 | ||
5146 | if (gfc_match_eos () == MATCH_YES) | |
5147 | return MATCH_YES; | |
5148 | ||
5149 | syntax: | |
5150 | gfc_syntax_error (*st); | |
5151 | ||
5152 | cleanup: | |
cbb9e6aa | 5153 | gfc_current_locus = old_loc; |
4ee9c684 | 5154 | return MATCH_ERROR; |
5155 | } | |
5156 | ||
5157 | ||
5158 | ||
5159 | /***************** Attribute declaration statements ****************/ | |
5160 | ||
5161 | /* Set the attribute of a single variable. */ | |
5162 | ||
5163 | static match | |
5164 | attr_decl1 (void) | |
5165 | { | |
5166 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5167 | gfc_array_spec *as; | |
5168 | gfc_symbol *sym; | |
5169 | locus var_locus; | |
5170 | match m; | |
5171 | ||
5172 | as = NULL; | |
5173 | ||
5174 | m = gfc_match_name (name); | |
5175 | if (m != MATCH_YES) | |
5176 | goto cleanup; | |
5177 | ||
5178 | if (find_special (name, &sym)) | |
5179 | return MATCH_ERROR; | |
5180 | ||
cbb9e6aa | 5181 | var_locus = gfc_current_locus; |
4ee9c684 | 5182 | |
5183 | /* Deal with possible array specification for certain attributes. */ | |
5184 | if (current_attr.dimension | |
5185 | || current_attr.allocatable | |
5186 | || current_attr.pointer | |
5187 | || current_attr.target) | |
5188 | { | |
5189 | m = gfc_match_array_spec (&as); | |
5190 | if (m == MATCH_ERROR) | |
5191 | goto cleanup; | |
5192 | ||
5193 | if (current_attr.dimension && m == MATCH_NO) | |
5194 | { | |
1a9745d2 | 5195 | gfc_error ("Missing array specification at %L in DIMENSION " |
5196 | "statement", &var_locus); | |
4ee9c684 | 5197 | m = MATCH_ERROR; |
5198 | goto cleanup; | |
5199 | } | |
5200 | ||
13aebeb0 | 5201 | if (current_attr.dimension && sym->value) |
5202 | { | |
5203 | gfc_error ("Dimensions specified for %s at %L after its " | |
5204 | "initialisation", sym->name, &var_locus); | |
5205 | m = MATCH_ERROR; | |
5206 | goto cleanup; | |
5207 | } | |
5208 | ||
4ee9c684 | 5209 | if ((current_attr.allocatable || current_attr.pointer) |
5210 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
5211 | { | |
1a9745d2 | 5212 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
4ee9c684 | 5213 | m = MATCH_ERROR; |
5214 | goto cleanup; | |
5215 | } | |
5216 | } | |
5217 | ||
1a9745d2 | 5218 | /* Update symbol table. DIMENSION attribute is set |
5219 | in gfc_set_array_spec(). */ | |
4ee9c684 | 5220 | if (current_attr.dimension == 0 |
63986dfb | 5221 | && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE) |
4ee9c684 | 5222 | { |
5223 | m = MATCH_ERROR; | |
5224 | goto cleanup; | |
5225 | } | |
5226 | ||
5227 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
5228 | { | |
5229 | m = MATCH_ERROR; | |
5230 | goto cleanup; | |
5231 | } | |
e14bee04 | 5232 | |
b549d2a5 | 5233 | if (sym->attr.cray_pointee && sym->as != NULL) |
5234 | { | |
5235 | /* Fix the array spec. */ | |
5236 | m = gfc_mod_pointee_as (sym->as); | |
5237 | if (m == MATCH_ERROR) | |
5238 | goto cleanup; | |
5239 | } | |
4ee9c684 | 5240 | |
25dd7350 | 5241 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
14efb9b7 | 5242 | { |
5243 | m = MATCH_ERROR; | |
5244 | goto cleanup; | |
5245 | } | |
5246 | ||
4ee9c684 | 5247 | if ((current_attr.external || current_attr.intrinsic) |
5248 | && sym->attr.flavor != FL_PROCEDURE | |
950683ed | 5249 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
4ee9c684 | 5250 | { |
5251 | m = MATCH_ERROR; | |
5252 | goto cleanup; | |
5253 | } | |
5254 | ||
5255 | return MATCH_YES; | |
5256 | ||
5257 | cleanup: | |
5258 | gfc_free_array_spec (as); | |
5259 | return m; | |
5260 | } | |
5261 | ||
5262 | ||
5263 | /* Generic attribute declaration subroutine. Used for attributes that | |
5264 | just have a list of names. */ | |
5265 | ||
5266 | static match | |
5267 | attr_decl (void) | |
5268 | { | |
5269 | match m; | |
5270 | ||
5271 | /* Gobble the optional double colon, by simply ignoring the result | |
5272 | of gfc_match(). */ | |
5273 | gfc_match (" ::"); | |
5274 | ||
5275 | for (;;) | |
5276 | { | |
5277 | m = attr_decl1 (); | |
5278 | if (m != MATCH_YES) | |
5279 | break; | |
5280 | ||
5281 | if (gfc_match_eos () == MATCH_YES) | |
5282 | { | |
5283 | m = MATCH_YES; | |
5284 | break; | |
5285 | } | |
5286 | ||
5287 | if (gfc_match_char (',') != MATCH_YES) | |
5288 | { | |
5289 | gfc_error ("Unexpected character in variable list at %C"); | |
5290 | m = MATCH_ERROR; | |
5291 | break; | |
5292 | } | |
5293 | } | |
5294 | ||
5295 | return m; | |
5296 | } | |
5297 | ||
5298 | ||
b549d2a5 | 5299 | /* This routine matches Cray Pointer declarations of the form: |
5300 | pointer ( <pointer>, <pointee> ) | |
5301 | or | |
e14bee04 | 5302 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
5303 | The pointer, if already declared, should be an integer. Otherwise, we | |
b549d2a5 | 5304 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
5305 | be either a scalar, or an array declaration. No space is allocated for | |
e14bee04 | 5306 | the pointee. For the statement |
b549d2a5 | 5307 | pointer (ipt, ar(10)) |
5308 | any subsequent uses of ar will be translated (in C-notation) as | |
e14bee04 | 5309 | ar(i) => ((<type> *) ipt)(i) |
b7bf3f81 | 5310 | After gimplification, pointee variable will disappear in the code. */ |
b549d2a5 | 5311 | |
5312 | static match | |
5313 | cray_pointer_decl (void) | |
5314 | { | |
5315 | match m; | |
5316 | gfc_array_spec *as; | |
5317 | gfc_symbol *cptr; /* Pointer symbol. */ | |
5318 | gfc_symbol *cpte; /* Pointee symbol. */ | |
5319 | locus var_locus; | |
5320 | bool done = false; | |
5321 | ||
5322 | while (!done) | |
5323 | { | |
5324 | if (gfc_match_char ('(') != MATCH_YES) | |
5325 | { | |
5326 | gfc_error ("Expected '(' at %C"); | |
e14bee04 | 5327 | return MATCH_ERROR; |
b549d2a5 | 5328 | } |
e14bee04 | 5329 | |
b549d2a5 | 5330 | /* Match pointer. */ |
5331 | var_locus = gfc_current_locus; | |
5332 | gfc_clear_attr (¤t_attr); | |
5333 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
5334 | current_ts.type = BT_INTEGER; | |
5335 | current_ts.kind = gfc_index_integer_kind; | |
5336 | ||
e14bee04 | 5337 | m = gfc_match_symbol (&cptr, 0); |
b549d2a5 | 5338 | if (m != MATCH_YES) |
5339 | { | |
5340 | gfc_error ("Expected variable name at %C"); | |
5341 | return m; | |
5342 | } | |
e14bee04 | 5343 | |
b549d2a5 | 5344 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) |
5345 | return MATCH_ERROR; | |
5346 | ||
e14bee04 | 5347 | gfc_set_sym_referenced (cptr); |
b549d2a5 | 5348 | |
5349 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
5350 | { | |
5351 | cptr->ts.type = BT_INTEGER; | |
e14bee04 | 5352 | cptr->ts.kind = gfc_index_integer_kind; |
b549d2a5 | 5353 | } |
5354 | else if (cptr->ts.type != BT_INTEGER) | |
5355 | { | |
7698a624 | 5356 | gfc_error ("Cray pointer at %C must be an integer"); |
b549d2a5 | 5357 | return MATCH_ERROR; |
5358 | } | |
5359 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
5360 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
7698a624 | 5361 | " memory addresses require %d bytes", |
1a9745d2 | 5362 | cptr->ts.kind, gfc_index_integer_kind); |
b549d2a5 | 5363 | |
5364 | if (gfc_match_char (',') != MATCH_YES) | |
5365 | { | |
5366 | gfc_error ("Expected \",\" at %C"); | |
e14bee04 | 5367 | return MATCH_ERROR; |
b549d2a5 | 5368 | } |
5369 | ||
e14bee04 | 5370 | /* Match Pointee. */ |
b549d2a5 | 5371 | var_locus = gfc_current_locus; |
5372 | gfc_clear_attr (¤t_attr); | |
5373 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
5374 | current_ts.type = BT_UNKNOWN; | |
5375 | current_ts.kind = 0; | |
5376 | ||
5377 | m = gfc_match_symbol (&cpte, 0); | |
5378 | if (m != MATCH_YES) | |
5379 | { | |
5380 | gfc_error ("Expected variable name at %C"); | |
5381 | return m; | |
5382 | } | |
e14bee04 | 5383 | |
b549d2a5 | 5384 | /* Check for an optional array spec. */ |
5385 | m = gfc_match_array_spec (&as); | |
5386 | if (m == MATCH_ERROR) | |
5387 | { | |
5388 | gfc_free_array_spec (as); | |
5389 | return m; | |
5390 | } | |
5391 | else if (m == MATCH_NO) | |
5392 | { | |
5393 | gfc_free_array_spec (as); | |
5394 | as = NULL; | |
5395 | } | |
5396 | ||
5397 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
5398 | return MATCH_ERROR; | |
5399 | ||
5400 | gfc_set_sym_referenced (cpte); | |
5401 | ||
5402 | if (cpte->as == NULL) | |
5403 | { | |
5404 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
5405 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
5406 | } | |
5407 | else if (as != NULL) | |
5408 | { | |
7698a624 | 5409 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 5410 | gfc_free_array_spec (as); |
5411 | return MATCH_ERROR; | |
5412 | } | |
5413 | ||
5414 | as = NULL; | |
5415 | ||
5416 | if (cpte->as != NULL) | |
5417 | { | |
5418 | /* Fix array spec. */ | |
5419 | m = gfc_mod_pointee_as (cpte->as); | |
5420 | if (m == MATCH_ERROR) | |
5421 | return m; | |
5422 | } | |
5423 | ||
5424 | /* Point the Pointee at the Pointer. */ | |
b7bf3f81 | 5425 | cpte->cp_pointer = cptr; |
b549d2a5 | 5426 | |
5427 | if (gfc_match_char (')') != MATCH_YES) | |
5428 | { | |
5429 | gfc_error ("Expected \")\" at %C"); | |
5430 | return MATCH_ERROR; | |
5431 | } | |
5432 | m = gfc_match_char (','); | |
5433 | if (m != MATCH_YES) | |
5434 | done = true; /* Stop searching for more declarations. */ | |
5435 | ||
5436 | } | |
5437 | ||
5438 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
5439 | || gfc_match_eos () != MATCH_YES) | |
5440 | { | |
5441 | gfc_error ("Expected \",\" or end of statement at %C"); | |
5442 | return MATCH_ERROR; | |
5443 | } | |
5444 | return MATCH_YES; | |
5445 | } | |
5446 | ||
5447 | ||
4ee9c684 | 5448 | match |
5449 | gfc_match_external (void) | |
5450 | { | |
5451 | ||
5452 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5453 | current_attr.external = 1; |
4ee9c684 | 5454 | |
5455 | return attr_decl (); | |
5456 | } | |
5457 | ||
5458 | ||
4ee9c684 | 5459 | match |
5460 | gfc_match_intent (void) | |
5461 | { | |
5462 | sym_intent intent; | |
5463 | ||
5464 | intent = match_intent_spec (); | |
5465 | if (intent == INTENT_UNKNOWN) | |
5466 | return MATCH_ERROR; | |
5467 | ||
5468 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5469 | current_attr.intent = intent; |
4ee9c684 | 5470 | |
5471 | return attr_decl (); | |
5472 | } | |
5473 | ||
5474 | ||
5475 | match | |
5476 | gfc_match_intrinsic (void) | |
5477 | { | |
5478 | ||
5479 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5480 | current_attr.intrinsic = 1; |
4ee9c684 | 5481 | |
5482 | return attr_decl (); | |
5483 | } | |
5484 | ||
5485 | ||
5486 | match | |
5487 | gfc_match_optional (void) | |
5488 | { | |
5489 | ||
5490 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5491 | current_attr.optional = 1; |
4ee9c684 | 5492 | |
5493 | return attr_decl (); | |
5494 | } | |
5495 | ||
5496 | ||
5497 | match | |
5498 | gfc_match_pointer (void) | |
5499 | { | |
b549d2a5 | 5500 | gfc_gobble_whitespace (); |
e0be6f02 | 5501 | if (gfc_peek_ascii_char () == '(') |
b549d2a5 | 5502 | { |
5503 | if (!gfc_option.flag_cray_pointer) | |
5504 | { | |
1a9745d2 | 5505 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
5506 | "flag"); | |
b549d2a5 | 5507 | return MATCH_ERROR; |
5508 | } | |
5509 | return cray_pointer_decl (); | |
5510 | } | |
5511 | else | |
5512 | { | |
5513 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5514 | current_attr.pointer = 1; |
b549d2a5 | 5515 | |
5516 | return attr_decl (); | |
5517 | } | |
4ee9c684 | 5518 | } |
5519 | ||
5520 | ||
5521 | match | |
5522 | gfc_match_allocatable (void) | |
5523 | { | |
4ee9c684 | 5524 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5525 | current_attr.allocatable = 1; |
4ee9c684 | 5526 | |
5527 | return attr_decl (); | |
5528 | } | |
5529 | ||
5530 | ||
5531 | match | |
5532 | gfc_match_dimension (void) | |
5533 | { | |
4ee9c684 | 5534 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5535 | current_attr.dimension = 1; |
4ee9c684 | 5536 | |
5537 | return attr_decl (); | |
5538 | } | |
5539 | ||
5540 | ||
5541 | match | |
5542 | gfc_match_target (void) | |
5543 | { | |
4ee9c684 | 5544 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5545 | current_attr.target = 1; |
4ee9c684 | 5546 | |
5547 | return attr_decl (); | |
5548 | } | |
5549 | ||
5550 | ||
5551 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
5552 | statement. */ | |
5553 | ||
5554 | static match | |
5555 | access_attr_decl (gfc_statement st) | |
5556 | { | |
5557 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5558 | interface_type type; | |
5559 | gfc_user_op *uop; | |
5560 | gfc_symbol *sym; | |
5561 | gfc_intrinsic_op operator; | |
5562 | match m; | |
5563 | ||
5564 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5565 | goto done; | |
5566 | ||
5567 | for (;;) | |
5568 | { | |
5569 | m = gfc_match_generic_spec (&type, name, &operator); | |
5570 | if (m == MATCH_NO) | |
5571 | goto syntax; | |
5572 | if (m == MATCH_ERROR) | |
5573 | return MATCH_ERROR; | |
5574 | ||
5575 | switch (type) | |
5576 | { | |
5577 | case INTERFACE_NAMELESS: | |
94fa7146 | 5578 | case INTERFACE_ABSTRACT: |
4ee9c684 | 5579 | goto syntax; |
5580 | ||
5581 | case INTERFACE_GENERIC: | |
5582 | if (gfc_get_symbol (name, NULL, &sym)) | |
5583 | goto done; | |
5584 | ||
1a9745d2 | 5585 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
5586 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
950683ed | 5587 | sym->name, NULL) == FAILURE) |
4ee9c684 | 5588 | return MATCH_ERROR; |
5589 | ||
5590 | break; | |
5591 | ||
5592 | case INTERFACE_INTRINSIC_OP: | |
5593 | if (gfc_current_ns->operator_access[operator] == ACCESS_UNKNOWN) | |
5594 | { | |
5595 | gfc_current_ns->operator_access[operator] = | |
5596 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
5597 | } | |
5598 | else | |
5599 | { | |
5600 | gfc_error ("Access specification of the %s operator at %C has " | |
5601 | "already been specified", gfc_op2string (operator)); | |
5602 | goto done; | |
5603 | } | |
5604 | ||
5605 | break; | |
5606 | ||
5607 | case INTERFACE_USER_OP: | |
5608 | uop = gfc_get_uop (name); | |
5609 | ||
5610 | if (uop->access == ACCESS_UNKNOWN) | |
5611 | { | |
1a9745d2 | 5612 | uop->access = (st == ST_PUBLIC) |
5613 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
4ee9c684 | 5614 | } |
5615 | else | |
5616 | { | |
1a9745d2 | 5617 | gfc_error ("Access specification of the .%s. operator at %C " |
5618 | "has already been specified", sym->name); | |
4ee9c684 | 5619 | goto done; |
5620 | } | |
5621 | ||
5622 | break; | |
5623 | } | |
5624 | ||
5625 | if (gfc_match_char (',') == MATCH_NO) | |
5626 | break; | |
5627 | } | |
5628 | ||
5629 | if (gfc_match_eos () != MATCH_YES) | |
5630 | goto syntax; | |
5631 | return MATCH_YES; | |
5632 | ||
5633 | syntax: | |
5634 | gfc_syntax_error (st); | |
5635 | ||
5636 | done: | |
5637 | return MATCH_ERROR; | |
5638 | } | |
5639 | ||
5640 | ||
3ea52af3 | 5641 | match |
5642 | gfc_match_protected (void) | |
5643 | { | |
5644 | gfc_symbol *sym; | |
5645 | match m; | |
5646 | ||
5647 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
5648 | { | |
5649 | gfc_error ("PROTECTED at %C only allowed in specification " | |
5650 | "part of a module"); | |
5651 | return MATCH_ERROR; | |
5652 | ||
5653 | } | |
5654 | ||
1a9745d2 | 5655 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
3ea52af3 | 5656 | == FAILURE) |
5657 | return MATCH_ERROR; | |
5658 | ||
5659 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5660 | { | |
5661 | return MATCH_ERROR; | |
5662 | } | |
5663 | ||
5664 | if (gfc_match_eos () == MATCH_YES) | |
5665 | goto syntax; | |
5666 | ||
5667 | for(;;) | |
5668 | { | |
5669 | m = gfc_match_symbol (&sym, 0); | |
5670 | switch (m) | |
5671 | { | |
5672 | case MATCH_YES: | |
1a9745d2 | 5673 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
5674 | == FAILURE) | |
3ea52af3 | 5675 | return MATCH_ERROR; |
5676 | goto next_item; | |
5677 | ||
5678 | case MATCH_NO: | |
5679 | break; | |
5680 | ||
5681 | case MATCH_ERROR: | |
5682 | return MATCH_ERROR; | |
5683 | } | |
5684 | ||
5685 | next_item: | |
5686 | if (gfc_match_eos () == MATCH_YES) | |
5687 | break; | |
5688 | if (gfc_match_char (',') != MATCH_YES) | |
5689 | goto syntax; | |
5690 | } | |
5691 | ||
5692 | return MATCH_YES; | |
5693 | ||
5694 | syntax: | |
5695 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
5696 | return MATCH_ERROR; | |
5697 | } | |
5698 | ||
5699 | ||
a0527218 | 5700 | /* The PRIVATE statement is a bit weird in that it can be an attribute |
4ee9c684 | 5701 | declaration, but also works as a standlone statement inside of a |
5702 | type declaration or a module. */ | |
5703 | ||
5704 | match | |
1a9745d2 | 5705 | gfc_match_private (gfc_statement *st) |
4ee9c684 | 5706 | { |
5707 | ||
5708 | if (gfc_match ("private") != MATCH_YES) | |
5709 | return MATCH_NO; | |
5710 | ||
e14bee04 | 5711 | if (gfc_current_state () != COMP_MODULE |
5712 | && (gfc_current_state () != COMP_DERIVED | |
5713 | || !gfc_state_stack->previous | |
5714 | || gfc_state_stack->previous->state != COMP_MODULE)) | |
5715 | { | |
5716 | gfc_error ("PRIVATE statement at %C is only allowed in the " | |
5717 | "specification part of a module"); | |
5718 | return MATCH_ERROR; | |
5719 | } | |
5720 | ||
4ee9c684 | 5721 | if (gfc_current_state () == COMP_DERIVED) |
5722 | { | |
5723 | if (gfc_match_eos () == MATCH_YES) | |
5724 | { | |
5725 | *st = ST_PRIVATE; | |
5726 | return MATCH_YES; | |
5727 | } | |
5728 | ||
5729 | gfc_syntax_error (ST_PRIVATE); | |
5730 | return MATCH_ERROR; | |
5731 | } | |
5732 | ||
5733 | if (gfc_match_eos () == MATCH_YES) | |
5734 | { | |
5735 | *st = ST_PRIVATE; | |
5736 | return MATCH_YES; | |
5737 | } | |
5738 | ||
5739 | *st = ST_ATTR_DECL; | |
5740 | return access_attr_decl (ST_PRIVATE); | |
5741 | } | |
5742 | ||
5743 | ||
5744 | match | |
1a9745d2 | 5745 | gfc_match_public (gfc_statement *st) |
4ee9c684 | 5746 | { |
5747 | ||
5748 | if (gfc_match ("public") != MATCH_YES) | |
5749 | return MATCH_NO; | |
5750 | ||
e14bee04 | 5751 | if (gfc_current_state () != COMP_MODULE) |
5752 | { | |
5753 | gfc_error ("PUBLIC statement at %C is only allowed in the " | |
5754 | "specification part of a module"); | |
5755 | return MATCH_ERROR; | |
5756 | } | |
5757 | ||
4ee9c684 | 5758 | if (gfc_match_eos () == MATCH_YES) |
5759 | { | |
5760 | *st = ST_PUBLIC; | |
5761 | return MATCH_YES; | |
5762 | } | |
5763 | ||
5764 | *st = ST_ATTR_DECL; | |
5765 | return access_attr_decl (ST_PUBLIC); | |
5766 | } | |
5767 | ||
5768 | ||
5769 | /* Workhorse for gfc_match_parameter. */ | |
5770 | ||
5771 | static match | |
5772 | do_parm (void) | |
5773 | { | |
5774 | gfc_symbol *sym; | |
5775 | gfc_expr *init; | |
5776 | match m; | |
5777 | ||
5778 | m = gfc_match_symbol (&sym, 0); | |
5779 | if (m == MATCH_NO) | |
5780 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
5781 | ||
5782 | if (m != MATCH_YES) | |
5783 | return m; | |
5784 | ||
5785 | if (gfc_match_char ('=') == MATCH_NO) | |
5786 | { | |
5787 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
5788 | return MATCH_ERROR; | |
5789 | } | |
5790 | ||
5791 | m = gfc_match_init_expr (&init); | |
5792 | if (m == MATCH_NO) | |
5793 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
5794 | if (m != MATCH_YES) | |
5795 | return m; | |
5796 | ||
5797 | if (sym->ts.type == BT_UNKNOWN | |
5798 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
5799 | { | |
5800 | m = MATCH_ERROR; | |
5801 | goto cleanup; | |
5802 | } | |
5803 | ||
5804 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
950683ed | 5805 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
4ee9c684 | 5806 | { |
5807 | m = MATCH_ERROR; | |
5808 | goto cleanup; | |
5809 | } | |
5810 | ||
13aebeb0 | 5811 | if (sym->value) |
5812 | { | |
5813 | gfc_error ("Initializing already initialized variable at %C"); | |
5814 | m = MATCH_ERROR; | |
5815 | goto cleanup; | |
5816 | } | |
5817 | ||
c1b6da4a | 5818 | if (sym->ts.type == BT_CHARACTER |
5819 | && sym->ts.cl != NULL | |
5820 | && sym->ts.cl->length != NULL | |
5821 | && sym->ts.cl->length->expr_type == EXPR_CONSTANT | |
5822 | && init->expr_type == EXPR_CONSTANT | |
f97d54ed | 5823 | && init->ts.type == BT_CHARACTER) |
c1b6da4a | 5824 | gfc_set_constant_character_len ( |
1bfea7e8 | 5825 | mpz_get_si (sym->ts.cl->length->value.integer), init, false); |
f97d54ed | 5826 | else if (sym->ts.type == BT_CHARACTER && sym->ts.cl != NULL |
5827 | && sym->ts.cl->length == NULL) | |
5828 | { | |
5829 | int clen; | |
5830 | if (init->expr_type == EXPR_CONSTANT) | |
5831 | { | |
5832 | clen = init->value.character.length; | |
5833 | sym->ts.cl->length = gfc_int_expr (clen); | |
5834 | } | |
5835 | else if (init->expr_type == EXPR_ARRAY) | |
5836 | { | |
5837 | gfc_expr *p = init->value.constructor->expr; | |
5838 | clen = p->value.character.length; | |
5839 | sym->ts.cl->length = gfc_int_expr (clen); | |
5840 | } | |
5841 | else if (init->ts.cl && init->ts.cl->length) | |
5842 | sym->ts.cl->length = gfc_copy_expr (sym->value->ts.cl->length); | |
5843 | } | |
c1b6da4a | 5844 | |
4ee9c684 | 5845 | sym->value = init; |
5846 | return MATCH_YES; | |
5847 | ||
5848 | cleanup: | |
5849 | gfc_free_expr (init); | |
5850 | return m; | |
5851 | } | |
5852 | ||
5853 | ||
5854 | /* Match a parameter statement, with the weird syntax that these have. */ | |
5855 | ||
5856 | match | |
5857 | gfc_match_parameter (void) | |
5858 | { | |
5859 | match m; | |
5860 | ||
5861 | if (gfc_match_char ('(') == MATCH_NO) | |
5862 | return MATCH_NO; | |
5863 | ||
5864 | for (;;) | |
5865 | { | |
5866 | m = do_parm (); | |
5867 | if (m != MATCH_YES) | |
5868 | break; | |
5869 | ||
5870 | if (gfc_match (" )%t") == MATCH_YES) | |
5871 | break; | |
5872 | ||
5873 | if (gfc_match_char (',') != MATCH_YES) | |
5874 | { | |
5875 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
5876 | m = MATCH_ERROR; | |
5877 | break; | |
5878 | } | |
5879 | } | |
5880 | ||
5881 | return m; | |
5882 | } | |
5883 | ||
5884 | ||
5885 | /* Save statements have a special syntax. */ | |
5886 | ||
5887 | match | |
5888 | gfc_match_save (void) | |
5889 | { | |
82f5ee13 | 5890 | char n[GFC_MAX_SYMBOL_LEN+1]; |
5891 | gfc_common_head *c; | |
4ee9c684 | 5892 | gfc_symbol *sym; |
5893 | match m; | |
5894 | ||
5895 | if (gfc_match_eos () == MATCH_YES) | |
5896 | { | |
5897 | if (gfc_current_ns->seen_save) | |
5898 | { | |
1a9745d2 | 5899 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
5900 | "follows previous SAVE statement") | |
76e82f95 | 5901 | == FAILURE) |
5902 | return MATCH_ERROR; | |
4ee9c684 | 5903 | } |
5904 | ||
5905 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
5906 | return MATCH_YES; | |
5907 | } | |
5908 | ||
5909 | if (gfc_current_ns->save_all) | |
5910 | { | |
1a9745d2 | 5911 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
5912 | "blanket SAVE statement") | |
76e82f95 | 5913 | == FAILURE) |
5914 | return MATCH_ERROR; | |
4ee9c684 | 5915 | } |
5916 | ||
5917 | gfc_match (" ::"); | |
5918 | ||
5919 | for (;;) | |
5920 | { | |
5921 | m = gfc_match_symbol (&sym, 0); | |
5922 | switch (m) | |
5923 | { | |
5924 | case MATCH_YES: | |
1a9745d2 | 5925 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
5926 | == FAILURE) | |
4ee9c684 | 5927 | return MATCH_ERROR; |
5928 | goto next_item; | |
5929 | ||
5930 | case MATCH_NO: | |
5931 | break; | |
5932 | ||
5933 | case MATCH_ERROR: | |
5934 | return MATCH_ERROR; | |
5935 | } | |
5936 | ||
82f5ee13 | 5937 | m = gfc_match (" / %n /", &n); |
4ee9c684 | 5938 | if (m == MATCH_ERROR) |
5939 | return MATCH_ERROR; | |
5940 | if (m == MATCH_NO) | |
5941 | goto syntax; | |
5942 | ||
403ddc45 | 5943 | c = gfc_get_common (n, 0); |
82f5ee13 | 5944 | c->saved = 1; |
5945 | ||
4ee9c684 | 5946 | gfc_current_ns->seen_save = 1; |
5947 | ||
5948 | next_item: | |
5949 | if (gfc_match_eos () == MATCH_YES) | |
5950 | break; | |
5951 | if (gfc_match_char (',') != MATCH_YES) | |
5952 | goto syntax; | |
5953 | } | |
5954 | ||
5955 | return MATCH_YES; | |
5956 | ||
5957 | syntax: | |
5958 | gfc_error ("Syntax error in SAVE statement at %C"); | |
5959 | return MATCH_ERROR; | |
5960 | } | |
5961 | ||
5962 | ||
8f6339b6 | 5963 | match |
5964 | gfc_match_value (void) | |
5965 | { | |
5966 | gfc_symbol *sym; | |
5967 | match m; | |
5968 | ||
1a9745d2 | 5969 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
8f6339b6 | 5970 | == FAILURE) |
5971 | return MATCH_ERROR; | |
5972 | ||
5973 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5974 | { | |
5975 | return MATCH_ERROR; | |
5976 | } | |
5977 | ||
5978 | if (gfc_match_eos () == MATCH_YES) | |
5979 | goto syntax; | |
5980 | ||
5981 | for(;;) | |
5982 | { | |
5983 | m = gfc_match_symbol (&sym, 0); | |
5984 | switch (m) | |
5985 | { | |
5986 | case MATCH_YES: | |
1a9745d2 | 5987 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
5988 | == FAILURE) | |
8f6339b6 | 5989 | return MATCH_ERROR; |
5990 | goto next_item; | |
5991 | ||
5992 | case MATCH_NO: | |
5993 | break; | |
5994 | ||
5995 | case MATCH_ERROR: | |
5996 | return MATCH_ERROR; | |
5997 | } | |
5998 | ||
5999 | next_item: | |
6000 | if (gfc_match_eos () == MATCH_YES) | |
6001 | break; | |
6002 | if (gfc_match_char (',') != MATCH_YES) | |
6003 | goto syntax; | |
6004 | } | |
6005 | ||
6006 | return MATCH_YES; | |
6007 | ||
6008 | syntax: | |
6009 | gfc_error ("Syntax error in VALUE statement at %C"); | |
6010 | return MATCH_ERROR; | |
6011 | } | |
6012 | ||
f6d0e37a | 6013 | |
ef814c81 | 6014 | match |
6015 | gfc_match_volatile (void) | |
6016 | { | |
6017 | gfc_symbol *sym; | |
6018 | match m; | |
6019 | ||
1a9745d2 | 6020 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
ef814c81 | 6021 | == FAILURE) |
6022 | return MATCH_ERROR; | |
6023 | ||
6024 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6025 | { | |
6026 | return MATCH_ERROR; | |
6027 | } | |
6028 | ||
6029 | if (gfc_match_eos () == MATCH_YES) | |
6030 | goto syntax; | |
6031 | ||
6032 | for(;;) | |
6033 | { | |
2f241857 | 6034 | /* VOLATILE is special because it can be added to host-associated |
6035 | symbols locally. */ | |
6036 | m = gfc_match_symbol (&sym, 1); | |
ef814c81 | 6037 | switch (m) |
6038 | { | |
6039 | case MATCH_YES: | |
1a9745d2 | 6040 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
6041 | == FAILURE) | |
ef814c81 | 6042 | return MATCH_ERROR; |
6043 | goto next_item; | |
6044 | ||
6045 | case MATCH_NO: | |
6046 | break; | |
6047 | ||
6048 | case MATCH_ERROR: | |
6049 | return MATCH_ERROR; | |
6050 | } | |
6051 | ||
6052 | next_item: | |
6053 | if (gfc_match_eos () == MATCH_YES) | |
6054 | break; | |
6055 | if (gfc_match_char (',') != MATCH_YES) | |
6056 | goto syntax; | |
6057 | } | |
6058 | ||
6059 | return MATCH_YES; | |
6060 | ||
6061 | syntax: | |
6062 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
6063 | return MATCH_ERROR; | |
6064 | } | |
6065 | ||
6066 | ||
4ee9c684 | 6067 | /* Match a module procedure statement. Note that we have to modify |
6068 | symbols in the parent's namespace because the current one was there | |
89d91d02 | 6069 | to receive symbols that are in an interface's formal argument list. */ |
4ee9c684 | 6070 | |
6071 | match | |
6072 | gfc_match_modproc (void) | |
6073 | { | |
6074 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6075 | gfc_symbol *sym; | |
6076 | match m; | |
63d42079 | 6077 | gfc_namespace *module_ns; |
94ce9f74 | 6078 | gfc_interface *old_interface_head, *interface; |
4ee9c684 | 6079 | |
6080 | if (gfc_state_stack->state != COMP_INTERFACE | |
6081 | || gfc_state_stack->previous == NULL | |
5cf92482 | 6082 | || current_interface.type == INTERFACE_NAMELESS |
6083 | || current_interface.type == INTERFACE_ABSTRACT) | |
4ee9c684 | 6084 | { |
1a9745d2 | 6085 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
6086 | "interface"); | |
4ee9c684 | 6087 | return MATCH_ERROR; |
6088 | } | |
6089 | ||
63d42079 | 6090 | module_ns = gfc_current_ns->parent; |
6091 | for (; module_ns; module_ns = module_ns->parent) | |
6092 | if (module_ns->proc_name->attr.flavor == FL_MODULE) | |
6093 | break; | |
6094 | ||
6095 | if (module_ns == NULL) | |
6096 | return MATCH_ERROR; | |
6097 | ||
94ce9f74 | 6098 | /* Store the current state of the interface. We will need it if we |
6099 | end up with a syntax error and need to recover. */ | |
6100 | old_interface_head = gfc_current_interface_head (); | |
6101 | ||
4ee9c684 | 6102 | for (;;) |
6103 | { | |
94ce9f74 | 6104 | bool last = false; |
6105 | ||
4ee9c684 | 6106 | m = gfc_match_name (name); |
6107 | if (m == MATCH_NO) | |
6108 | goto syntax; | |
6109 | if (m != MATCH_YES) | |
6110 | return MATCH_ERROR; | |
6111 | ||
94ce9f74 | 6112 | /* Check for syntax error before starting to add symbols to the |
6113 | current namespace. */ | |
6114 | if (gfc_match_eos () == MATCH_YES) | |
6115 | last = true; | |
6116 | if (!last && gfc_match_char (',') != MATCH_YES) | |
6117 | goto syntax; | |
6118 | ||
6119 | /* Now we're sure the syntax is valid, we process this item | |
6120 | further. */ | |
63d42079 | 6121 | if (gfc_get_symbol (name, module_ns, &sym)) |
4ee9c684 | 6122 | return MATCH_ERROR; |
6123 | ||
6124 | if (sym->attr.proc != PROC_MODULE | |
950683ed | 6125 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
6126 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 6127 | return MATCH_ERROR; |
6128 | ||
6129 | if (gfc_add_interface (sym) == FAILURE) | |
6130 | return MATCH_ERROR; | |
6131 | ||
3186f695 | 6132 | sym->attr.mod_proc = 1; |
6133 | ||
94ce9f74 | 6134 | if (last) |
4ee9c684 | 6135 | break; |
4ee9c684 | 6136 | } |
6137 | ||
6138 | return MATCH_YES; | |
6139 | ||
6140 | syntax: | |
94ce9f74 | 6141 | /* Restore the previous state of the interface. */ |
6142 | interface = gfc_current_interface_head (); | |
6143 | gfc_set_current_interface_head (old_interface_head); | |
6144 | ||
6145 | /* Free the new interfaces. */ | |
6146 | while (interface != old_interface_head) | |
6147 | { | |
6148 | gfc_interface *i = interface->next; | |
6149 | gfc_free (interface); | |
6150 | interface = i; | |
6151 | } | |
6152 | ||
6153 | /* And issue a syntax error. */ | |
4ee9c684 | 6154 | gfc_syntax_error (ST_MODULE_PROC); |
6155 | return MATCH_ERROR; | |
6156 | } | |
6157 | ||
6158 | ||
c5d33754 | 6159 | /* Match the optional attribute specifiers for a type declaration. |
6160 | Return MATCH_ERROR if an error is encountered in one of the handled | |
6161 | attributes (public, private, bind(c)), MATCH_NO if what's found is | |
6162 | not a handled attribute, and MATCH_YES otherwise. TODO: More error | |
6163 | checking on attribute conflicts needs to be done. */ | |
4ee9c684 | 6164 | |
6165 | match | |
c5d33754 | 6166 | gfc_get_type_attr_spec (symbol_attribute *attr) |
4ee9c684 | 6167 | { |
c5d33754 | 6168 | /* See if the derived type is marked as private. */ |
4ee9c684 | 6169 | if (gfc_match (" , private") == MATCH_YES) |
6170 | { | |
e14bee04 | 6171 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 6172 | { |
e14bee04 | 6173 | gfc_error ("Derived type at %C can only be PRIVATE in the " |
6174 | "specification part of a module"); | |
4ee9c684 | 6175 | return MATCH_ERROR; |
6176 | } | |
6177 | ||
c5d33754 | 6178 | if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
4ee9c684 | 6179 | return MATCH_ERROR; |
4ee9c684 | 6180 | } |
c5d33754 | 6181 | else if (gfc_match (" , public") == MATCH_YES) |
4ee9c684 | 6182 | { |
e14bee04 | 6183 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 6184 | { |
e14bee04 | 6185 | gfc_error ("Derived type at %C can only be PUBLIC in the " |
6186 | "specification part of a module"); | |
4ee9c684 | 6187 | return MATCH_ERROR; |
6188 | } | |
6189 | ||
c5d33754 | 6190 | if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
4ee9c684 | 6191 | return MATCH_ERROR; |
4ee9c684 | 6192 | } |
33e86520 | 6193 | else if (gfc_match(" , bind ( c )") == MATCH_YES) |
c5d33754 | 6194 | { |
6195 | /* If the type is defined to be bind(c) it then needs to make | |
6196 | sure that all fields are interoperable. This will | |
6197 | need to be a semantic check on the finished derived type. | |
6198 | See 15.2.3 (lines 9-12) of F2003 draft. */ | |
6199 | if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) | |
6200 | return MATCH_ERROR; | |
6201 | ||
6202 | /* TODO: attr conflicts need to be checked, probably in symbol.c. */ | |
6203 | } | |
6204 | else | |
6205 | return MATCH_NO; | |
6206 | ||
6207 | /* If we get here, something matched. */ | |
6208 | return MATCH_YES; | |
6209 | } | |
6210 | ||
6211 | ||
6212 | /* Match the beginning of a derived type declaration. If a type name | |
6213 | was the result of a function, then it is possible to have a symbol | |
6214 | already to be known as a derived type yet have no components. */ | |
6215 | ||
6216 | match | |
6217 | gfc_match_derived_decl (void) | |
6218 | { | |
6219 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6220 | symbol_attribute attr; | |
6221 | gfc_symbol *sym; | |
6222 | match m; | |
6223 | match is_type_attr_spec = MATCH_NO; | |
33e86520 | 6224 | bool seen_attr = false; |
c5d33754 | 6225 | |
6226 | if (gfc_current_state () == COMP_DERIVED) | |
6227 | return MATCH_NO; | |
6228 | ||
6229 | gfc_clear_attr (&attr); | |
6230 | ||
6231 | do | |
6232 | { | |
6233 | is_type_attr_spec = gfc_get_type_attr_spec (&attr); | |
6234 | if (is_type_attr_spec == MATCH_ERROR) | |
6235 | return MATCH_ERROR; | |
33e86520 | 6236 | if (is_type_attr_spec == MATCH_YES) |
6237 | seen_attr = true; | |
c5d33754 | 6238 | } while (is_type_attr_spec == MATCH_YES); |
4ee9c684 | 6239 | |
33e86520 | 6240 | if (gfc_match (" ::") != MATCH_YES && seen_attr) |
4ee9c684 | 6241 | { |
6242 | gfc_error ("Expected :: in TYPE definition at %C"); | |
6243 | return MATCH_ERROR; | |
6244 | } | |
6245 | ||
6246 | m = gfc_match (" %n%t", name); | |
6247 | if (m != MATCH_YES) | |
6248 | return m; | |
6249 | ||
a3055431 | 6250 | /* Make sure the name is not the name of an intrinsic type. */ |
6251 | if (gfc_is_intrinsic_typename (name)) | |
4ee9c684 | 6252 | { |
1a9745d2 | 6253 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
6254 | "type", name); | |
4ee9c684 | 6255 | return MATCH_ERROR; |
6256 | } | |
6257 | ||
6258 | if (gfc_get_symbol (name, NULL, &sym)) | |
6259 | return MATCH_ERROR; | |
6260 | ||
6261 | if (sym->ts.type != BT_UNKNOWN) | |
6262 | { | |
6263 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
6264 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
6265 | return MATCH_ERROR; | |
6266 | } | |
6267 | ||
6268 | /* The symbol may already have the derived attribute without the | |
6269 | components. The ways this can happen is via a function | |
6270 | definition, an INTRINSIC statement or a subtype in another | |
6271 | derived type that is a pointer. The first part of the AND clause | |
b14e2757 | 6272 | is true if a the symbol is not the return value of a function. */ |
4ee9c684 | 6273 | if (sym->attr.flavor != FL_DERIVED |
950683ed | 6274 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 6275 | return MATCH_ERROR; |
6276 | ||
e6b82afc | 6277 | if (sym->components != NULL || sym->attr.zero_comp) |
4ee9c684 | 6278 | { |
1a9745d2 | 6279 | gfc_error ("Derived type definition of '%s' at %C has already been " |
6280 | "defined", sym->name); | |
4ee9c684 | 6281 | return MATCH_ERROR; |
6282 | } | |
6283 | ||
6284 | if (attr.access != ACCESS_UNKNOWN | |
950683ed | 6285 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
4ee9c684 | 6286 | return MATCH_ERROR; |
6287 | ||
c5d33754 | 6288 | /* See if the derived type was labeled as bind(c). */ |
6289 | if (attr.is_bind_c != 0) | |
6290 | sym->attr.is_bind_c = attr.is_bind_c; | |
6291 | ||
223f0f57 | 6292 | /* Construct the f2k_derived namespace if it is not yet there. */ |
6293 | if (!sym->f2k_derived) | |
6294 | sym->f2k_derived = gfc_get_namespace (NULL, 0); | |
6295 | ||
4ee9c684 | 6296 | gfc_new_block = sym; |
6297 | ||
6298 | return MATCH_YES; | |
6299 | } | |
b549d2a5 | 6300 | |
6301 | ||
6302 | /* Cray Pointees can be declared as: | |
6303 | pointer (ipt, a (n,m,...,*)) | |
6304 | By default, this is treated as an AS_ASSUMED_SIZE array. We'll | |
6305 | cheat and set a constant bound of 1 for the last dimension, if this | |
6306 | is the case. Since there is no bounds-checking for Cray Pointees, | |
6307 | this will be okay. */ | |
6308 | ||
6309 | try | |
6310 | gfc_mod_pointee_as (gfc_array_spec *as) | |
6311 | { | |
6312 | as->cray_pointee = true; /* This will be useful to know later. */ | |
6313 | if (as->type == AS_ASSUMED_SIZE) | |
6314 | { | |
6315 | as->type = AS_EXPLICIT; | |
6316 | as->upper[as->rank - 1] = gfc_int_expr (1); | |
6317 | as->cp_was_assumed = true; | |
6318 | } | |
6319 | else if (as->type == AS_ASSUMED_SHAPE) | |
6320 | { | |
6321 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
6322 | return MATCH_ERROR; | |
6323 | } | |
6324 | return MATCH_YES; | |
6325 | } | |
3b6a4b41 | 6326 | |
6327 | ||
6328 | /* Match the enum definition statement, here we are trying to match | |
6329 | the first line of enum definition statement. | |
6330 | Returns MATCH_YES if match is found. */ | |
6331 | ||
6332 | match | |
6333 | gfc_match_enum (void) | |
6334 | { | |
6335 | match m; | |
6336 | ||
6337 | m = gfc_match_eos (); | |
6338 | if (m != MATCH_YES) | |
6339 | return m; | |
6340 | ||
60fbbf9e | 6341 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") |
3b6a4b41 | 6342 | == FAILURE) |
6343 | return MATCH_ERROR; | |
6344 | ||
6345 | return MATCH_YES; | |
6346 | } | |
6347 | ||
6348 | ||
60fbbf9e | 6349 | /* Match a variable name with an optional initializer. When this |
6350 | subroutine is called, a variable is expected to be parsed next. | |
6351 | Depending on what is happening at the moment, updates either the | |
6352 | symbol table or the current interface. */ | |
6353 | ||
6354 | static match | |
6355 | enumerator_decl (void) | |
6356 | { | |
6357 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6358 | gfc_expr *initializer; | |
6359 | gfc_array_spec *as = NULL; | |
6360 | gfc_symbol *sym; | |
6361 | locus var_locus; | |
6362 | match m; | |
6363 | try t; | |
6364 | locus old_locus; | |
6365 | ||
6366 | initializer = NULL; | |
6367 | old_locus = gfc_current_locus; | |
6368 | ||
6369 | /* When we get here, we've just matched a list of attributes and | |
6370 | maybe a type and a double colon. The next thing we expect to see | |
6371 | is the name of the symbol. */ | |
6372 | m = gfc_match_name (name); | |
6373 | if (m != MATCH_YES) | |
6374 | goto cleanup; | |
6375 | ||
6376 | var_locus = gfc_current_locus; | |
6377 | ||
6378 | /* OK, we've successfully matched the declaration. Now put the | |
6379 | symbol in the current namespace. If we fail to create the symbol, | |
6380 | bail out. */ | |
6381 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
6382 | { | |
6383 | m = MATCH_ERROR; | |
6384 | goto cleanup; | |
6385 | } | |
6386 | ||
6387 | /* The double colon must be present in order to have initializers. | |
6388 | Otherwise the statement is ambiguous with an assignment statement. */ | |
6389 | if (colon_seen) | |
6390 | { | |
6391 | if (gfc_match_char ('=') == MATCH_YES) | |
6392 | { | |
6393 | m = gfc_match_init_expr (&initializer); | |
6394 | if (m == MATCH_NO) | |
6395 | { | |
6396 | gfc_error ("Expected an initialization expression at %C"); | |
6397 | m = MATCH_ERROR; | |
6398 | } | |
6399 | ||
6400 | if (m != MATCH_YES) | |
6401 | goto cleanup; | |
6402 | } | |
6403 | } | |
6404 | ||
6405 | /* If we do not have an initializer, the initialization value of the | |
6406 | previous enumerator (stored in last_initializer) is incremented | |
6407 | by 1 and is used to initialize the current enumerator. */ | |
6408 | if (initializer == NULL) | |
6409 | initializer = gfc_enum_initializer (last_initializer, old_locus); | |
e14bee04 | 6410 | |
60fbbf9e | 6411 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
6412 | { | |
6413 | gfc_error("ENUMERATOR %L not initialized with integer expression", | |
6414 | &var_locus); | |
e14bee04 | 6415 | m = MATCH_ERROR; |
60fbbf9e | 6416 | gfc_free_enum_history (); |
6417 | goto cleanup; | |
6418 | } | |
6419 | ||
6420 | /* Store this current initializer, for the next enumerator variable | |
6421 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
6422 | use last_initializer below. */ | |
6423 | last_initializer = initializer; | |
6424 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
6425 | ||
6426 | /* Maintain enumerator history. */ | |
6427 | gfc_find_symbol (name, NULL, 0, &sym); | |
6428 | create_enum_history (sym, last_initializer); | |
6429 | ||
6430 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
6431 | ||
6432 | cleanup: | |
6433 | /* Free stuff up and return. */ | |
6434 | gfc_free_expr (initializer); | |
6435 | ||
6436 | return m; | |
6437 | } | |
6438 | ||
6439 | ||
f6d0e37a | 6440 | /* Match the enumerator definition statement. */ |
3b6a4b41 | 6441 | |
6442 | match | |
6443 | gfc_match_enumerator_def (void) | |
6444 | { | |
6445 | match m; | |
60fbbf9e | 6446 | try t; |
e14bee04 | 6447 | |
3b6a4b41 | 6448 | gfc_clear_ts (¤t_ts); |
e14bee04 | 6449 | |
3b6a4b41 | 6450 | m = gfc_match (" enumerator"); |
6451 | if (m != MATCH_YES) | |
6452 | return m; | |
60fbbf9e | 6453 | |
6454 | m = gfc_match (" :: "); | |
6455 | if (m == MATCH_ERROR) | |
6456 | return m; | |
6457 | ||
6458 | colon_seen = (m == MATCH_YES); | |
e14bee04 | 6459 | |
3b6a4b41 | 6460 | if (gfc_current_state () != COMP_ENUM) |
6461 | { | |
6462 | gfc_error ("ENUM definition statement expected before %C"); | |
6463 | gfc_free_enum_history (); | |
6464 | return MATCH_ERROR; | |
6465 | } | |
6466 | ||
6467 | (¤t_ts)->type = BT_INTEGER; | |
6468 | (¤t_ts)->kind = gfc_c_int_kind; | |
e14bee04 | 6469 | |
60fbbf9e | 6470 | gfc_clear_attr (¤t_attr); |
6471 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
6472 | if (t == FAILURE) | |
3b6a4b41 | 6473 | { |
60fbbf9e | 6474 | m = MATCH_ERROR; |
3b6a4b41 | 6475 | goto cleanup; |
6476 | } | |
6477 | ||
3b6a4b41 | 6478 | for (;;) |
6479 | { | |
60fbbf9e | 6480 | m = enumerator_decl (); |
3b6a4b41 | 6481 | if (m == MATCH_ERROR) |
6482 | goto cleanup; | |
6483 | if (m == MATCH_NO) | |
6484 | break; | |
6485 | ||
6486 | if (gfc_match_eos () == MATCH_YES) | |
6487 | goto cleanup; | |
6488 | if (gfc_match_char (',') != MATCH_YES) | |
6489 | break; | |
6490 | } | |
6491 | ||
6492 | if (gfc_current_state () == COMP_ENUM) | |
6493 | { | |
6494 | gfc_free_enum_history (); | |
6495 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
6496 | m = MATCH_ERROR; | |
6497 | } | |
6498 | ||
6499 | cleanup: | |
6500 | gfc_free_array_spec (current_as); | |
6501 | current_as = NULL; | |
6502 | return m; | |
6503 | ||
6504 | } | |
6505 | ||
223f0f57 | 6506 | /* Match a FINAL declaration inside a derived type. */ |
6507 | ||
6508 | match | |
6509 | gfc_match_final_decl (void) | |
6510 | { | |
6511 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6512 | gfc_symbol* sym; | |
6513 | match m; | |
6514 | gfc_namespace* module_ns; | |
6515 | bool first, last; | |
6516 | ||
6517 | if (gfc_state_stack->state != COMP_DERIVED) | |
6518 | { | |
6519 | gfc_error ("FINAL declaration at %C must be inside a derived type " | |
6520 | "definition!"); | |
6521 | return MATCH_ERROR; | |
6522 | } | |
6523 | ||
6524 | gcc_assert (gfc_current_block ()); | |
6525 | ||
6526 | if (!gfc_state_stack->previous | |
6527 | || gfc_state_stack->previous->state != COMP_MODULE) | |
6528 | { | |
6529 | gfc_error ("Derived type declaration with FINAL at %C must be in the" | |
6530 | " specification part of a MODULE"); | |
6531 | return MATCH_ERROR; | |
6532 | } | |
6533 | ||
6534 | module_ns = gfc_current_ns; | |
6535 | gcc_assert (module_ns); | |
6536 | gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE); | |
6537 | ||
6538 | /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */ | |
6539 | if (gfc_match (" ::") == MATCH_ERROR) | |
6540 | return MATCH_ERROR; | |
6541 | ||
6542 | /* Match the sequence of procedure names. */ | |
6543 | first = true; | |
6544 | last = false; | |
6545 | do | |
6546 | { | |
6547 | gfc_finalizer* f; | |
6548 | ||
6549 | if (first && gfc_match_eos () == MATCH_YES) | |
6550 | { | |
6551 | gfc_error ("Empty FINAL at %C"); | |
6552 | return MATCH_ERROR; | |
6553 | } | |
6554 | ||
6555 | m = gfc_match_name (name); | |
6556 | if (m == MATCH_NO) | |
6557 | { | |
6558 | gfc_error ("Expected module procedure name at %C"); | |
6559 | return MATCH_ERROR; | |
6560 | } | |
6561 | else if (m != MATCH_YES) | |
6562 | return MATCH_ERROR; | |
6563 | ||
6564 | if (gfc_match_eos () == MATCH_YES) | |
6565 | last = true; | |
6566 | if (!last && gfc_match_char (',') != MATCH_YES) | |
6567 | { | |
6568 | gfc_error ("Expected ',' at %C"); | |
6569 | return MATCH_ERROR; | |
6570 | } | |
6571 | ||
6572 | if (gfc_get_symbol (name, module_ns, &sym)) | |
6573 | { | |
6574 | gfc_error ("Unknown procedure name \"%s\" at %C", name); | |
6575 | return MATCH_ERROR; | |
6576 | } | |
6577 | ||
6578 | /* Mark the symbol as module procedure. */ | |
6579 | if (sym->attr.proc != PROC_MODULE | |
6580 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
6581 | sym->name, NULL) == FAILURE) | |
6582 | return MATCH_ERROR; | |
6583 | ||
6584 | /* Check if we already have this symbol in the list, this is an error. */ | |
6585 | for (f = gfc_current_block ()->f2k_derived->finalizers; f; f = f->next) | |
6586 | if (f->procedure == sym) | |
6587 | { | |
6588 | gfc_error ("'%s' at %C is already defined as FINAL procedure!", | |
6589 | name); | |
6590 | return MATCH_ERROR; | |
6591 | } | |
6592 | ||
6593 | /* Add this symbol to the list of finalizers. */ | |
6594 | gcc_assert (gfc_current_block ()->f2k_derived); | |
6595 | ++sym->refs; | |
6596 | f = gfc_getmem (sizeof (gfc_finalizer)); | |
6597 | f->procedure = sym; | |
6598 | f->where = gfc_current_locus; | |
6599 | f->next = gfc_current_block ()->f2k_derived->finalizers; | |
6600 | gfc_current_block ()->f2k_derived->finalizers = f; | |
6601 | ||
6602 | first = false; | |
6603 | } | |
6604 | while (!last); | |
6605 | ||
6606 | return MATCH_YES; | |
6607 | } |