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4ee9c684 | 1 | /* Declaration statement matcher |
22c1d301 | 2 | Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
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" | |
6f092e31 | 27 | #include "flags.h" |
126387b5 | 28 | #include "constructor.h" |
cbbac028 | 29 | |
30 | /* Macros to access allocate memory for gfc_data_variable, | |
31 | gfc_data_value and gfc_data. */ | |
48d8ad5a | 32 | #define gfc_get_data_variable() XCNEW (gfc_data_variable) |
33 | #define gfc_get_data_value() XCNEW (gfc_data_value) | |
34 | #define gfc_get_data() XCNEW (gfc_data) | |
cbbac028 | 35 | |
36 | ||
36ae04f2 | 37 | /* This flag is set if an old-style length selector is matched |
4ee9c684 | 38 | during a type-declaration statement. */ |
39 | ||
40 | static int old_char_selector; | |
41 | ||
5739e54e | 42 | /* When variables acquire types and attributes from a declaration |
4ee9c684 | 43 | statement, they get them from the following static variables. The |
44 | first part of a declaration sets these variables and the second | |
45 | part copies these into symbol structures. */ | |
46 | ||
47 | static gfc_typespec current_ts; | |
48 | ||
49 | static symbol_attribute current_attr; | |
50 | static gfc_array_spec *current_as; | |
51 | static int colon_seen; | |
52 | ||
c5d33754 | 53 | /* The current binding label (if any). */ |
54 | static char curr_binding_label[GFC_MAX_BINDING_LABEL_LEN + 1]; | |
55 | /* Need to know how many identifiers are on the current data declaration | |
56 | line in case we're given the BIND(C) attribute with a NAME= specifier. */ | |
57 | static int num_idents_on_line; | |
58 | /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we | |
59 | can supply a name if the curr_binding_label is nil and NAME= was not. */ | |
60 | static int has_name_equals = 0; | |
61 | ||
3b6a4b41 | 62 | /* Initializer of the previous enumerator. */ |
63 | ||
64 | static gfc_expr *last_initializer; | |
65 | ||
66 | /* History of all the enumerators is maintained, so that | |
67 | kind values of all the enumerators could be updated depending | |
68 | upon the maximum initialized value. */ | |
69 | ||
70 | typedef struct enumerator_history | |
71 | { | |
72 | gfc_symbol *sym; | |
73 | gfc_expr *initializer; | |
74 | struct enumerator_history *next; | |
75 | } | |
76 | enumerator_history; | |
77 | ||
78 | /* Header of enum history chain. */ | |
79 | ||
80 | static enumerator_history *enum_history = NULL; | |
81 | ||
82 | /* Pointer of enum history node containing largest initializer. */ | |
83 | ||
84 | static enumerator_history *max_enum = NULL; | |
85 | ||
4ee9c684 | 86 | /* gfc_new_block points to the symbol of a newly matched block. */ |
87 | ||
88 | gfc_symbol *gfc_new_block; | |
89 | ||
077932f9 | 90 | bool gfc_matching_function; |
67a51c8e | 91 | |
4ee9c684 | 92 | |
b4f45d02 | 93 | /********************* DATA statement subroutines *********************/ |
94 | ||
1bfea7e8 | 95 | static bool in_match_data = false; |
96 | ||
97 | bool | |
98 | gfc_in_match_data (void) | |
99 | { | |
100 | return in_match_data; | |
101 | } | |
102 | ||
cbbac028 | 103 | static void |
104 | set_in_match_data (bool set_value) | |
1bfea7e8 | 105 | { |
106 | in_match_data = set_value; | |
107 | } | |
108 | ||
b4f45d02 | 109 | /* Free a gfc_data_variable structure and everything beneath it. */ |
110 | ||
111 | static void | |
1a9745d2 | 112 | free_variable (gfc_data_variable *p) |
b4f45d02 | 113 | { |
114 | gfc_data_variable *q; | |
115 | ||
116 | for (; p; p = q) | |
117 | { | |
118 | q = p->next; | |
119 | gfc_free_expr (p->expr); | |
120 | gfc_free_iterator (&p->iter, 0); | |
121 | free_variable (p->list); | |
b4f45d02 | 122 | gfc_free (p); |
123 | } | |
124 | } | |
125 | ||
126 | ||
127 | /* Free a gfc_data_value structure and everything beneath it. */ | |
128 | ||
129 | static void | |
1a9745d2 | 130 | free_value (gfc_data_value *p) |
b4f45d02 | 131 | { |
132 | gfc_data_value *q; | |
133 | ||
134 | for (; p; p = q) | |
135 | { | |
136 | q = p->next; | |
2d4466dd | 137 | mpz_clear (p->repeat); |
b4f45d02 | 138 | gfc_free_expr (p->expr); |
139 | gfc_free (p); | |
140 | } | |
141 | } | |
142 | ||
143 | ||
144 | /* Free a list of gfc_data structures. */ | |
145 | ||
146 | void | |
1a9745d2 | 147 | gfc_free_data (gfc_data *p) |
b4f45d02 | 148 | { |
149 | gfc_data *q; | |
150 | ||
151 | for (; p; p = q) | |
152 | { | |
153 | q = p->next; | |
b4f45d02 | 154 | free_variable (p->var); |
155 | free_value (p->value); | |
b4f45d02 | 156 | gfc_free (p); |
157 | } | |
158 | } | |
159 | ||
160 | ||
af29c1f0 | 161 | /* Free all data in a namespace. */ |
1a9745d2 | 162 | |
af29c1f0 | 163 | static void |
f6d0e37a | 164 | gfc_free_data_all (gfc_namespace *ns) |
af29c1f0 | 165 | { |
166 | gfc_data *d; | |
167 | ||
168 | for (;ns->data;) | |
169 | { | |
170 | d = ns->data->next; | |
171 | gfc_free (ns->data); | |
172 | ns->data = d; | |
173 | } | |
174 | } | |
175 | ||
176 | ||
b4f45d02 | 177 | static match var_element (gfc_data_variable *); |
178 | ||
179 | /* Match a list of variables terminated by an iterator and a right | |
180 | parenthesis. */ | |
181 | ||
182 | static match | |
1a9745d2 | 183 | var_list (gfc_data_variable *parent) |
b4f45d02 | 184 | { |
185 | gfc_data_variable *tail, var; | |
186 | match m; | |
187 | ||
188 | m = var_element (&var); | |
189 | if (m == MATCH_ERROR) | |
190 | return MATCH_ERROR; | |
191 | if (m == MATCH_NO) | |
192 | goto syntax; | |
193 | ||
194 | tail = gfc_get_data_variable (); | |
195 | *tail = var; | |
196 | ||
197 | parent->list = tail; | |
198 | ||
199 | for (;;) | |
200 | { | |
201 | if (gfc_match_char (',') != MATCH_YES) | |
202 | goto syntax; | |
203 | ||
204 | m = gfc_match_iterator (&parent->iter, 1); | |
205 | if (m == MATCH_YES) | |
206 | break; | |
207 | if (m == MATCH_ERROR) | |
208 | return MATCH_ERROR; | |
209 | ||
210 | m = var_element (&var); | |
211 | if (m == MATCH_ERROR) | |
212 | return MATCH_ERROR; | |
213 | if (m == MATCH_NO) | |
214 | goto syntax; | |
215 | ||
216 | tail->next = gfc_get_data_variable (); | |
217 | tail = tail->next; | |
218 | ||
219 | *tail = var; | |
220 | } | |
221 | ||
222 | if (gfc_match_char (')') != MATCH_YES) | |
223 | goto syntax; | |
224 | return MATCH_YES; | |
225 | ||
226 | syntax: | |
227 | gfc_syntax_error (ST_DATA); | |
228 | return MATCH_ERROR; | |
229 | } | |
230 | ||
231 | ||
232 | /* Match a single element in a data variable list, which can be a | |
233 | variable-iterator list. */ | |
234 | ||
235 | static match | |
c1977dbe | 236 | var_element (gfc_data_variable *new_var) |
b4f45d02 | 237 | { |
238 | match m; | |
239 | gfc_symbol *sym; | |
240 | ||
c1977dbe | 241 | memset (new_var, 0, sizeof (gfc_data_variable)); |
b4f45d02 | 242 | |
243 | if (gfc_match_char ('(') == MATCH_YES) | |
c1977dbe | 244 | return var_list (new_var); |
b4f45d02 | 245 | |
c1977dbe | 246 | m = gfc_match_variable (&new_var->expr, 0); |
b4f45d02 | 247 | if (m != MATCH_YES) |
248 | return m; | |
249 | ||
c1977dbe | 250 | sym = new_var->expr->symtree->n.sym; |
b4f45d02 | 251 | |
40de255b | 252 | /* Symbol should already have an associated type. */ |
253 | if (gfc_check_symbol_typed (sym, gfc_current_ns, | |
254 | false, gfc_current_locus) == FAILURE) | |
255 | return MATCH_ERROR; | |
256 | ||
1a9745d2 | 257 | if (!sym->attr.function && gfc_current_ns->parent |
258 | && gfc_current_ns->parent == sym->ns) | |
b4f45d02 | 259 | { |
c8df3e9c | 260 | gfc_error ("Host associated variable '%s' may not be in the DATA " |
7698a624 | 261 | "statement at %C", sym->name); |
b4f45d02 | 262 | return MATCH_ERROR; |
263 | } | |
264 | ||
c8df3e9c | 265 | if (gfc_current_state () != COMP_BLOCK_DATA |
1a9745d2 | 266 | && sym->attr.in_common |
267 | && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of " | |
268 | "common block variable '%s' in DATA statement at %C", | |
269 | sym->name) == FAILURE) | |
c8df3e9c | 270 | return MATCH_ERROR; |
b4f45d02 | 271 | |
c1977dbe | 272 | if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE) |
b4f45d02 | 273 | return MATCH_ERROR; |
274 | ||
275 | return MATCH_YES; | |
276 | } | |
277 | ||
278 | ||
279 | /* Match the top-level list of data variables. */ | |
280 | ||
281 | static match | |
1a9745d2 | 282 | top_var_list (gfc_data *d) |
b4f45d02 | 283 | { |
c1977dbe | 284 | gfc_data_variable var, *tail, *new_var; |
b4f45d02 | 285 | match m; |
286 | ||
287 | tail = NULL; | |
288 | ||
289 | for (;;) | |
290 | { | |
291 | m = var_element (&var); | |
292 | if (m == MATCH_NO) | |
293 | goto syntax; | |
294 | if (m == MATCH_ERROR) | |
295 | return MATCH_ERROR; | |
296 | ||
c1977dbe | 297 | new_var = gfc_get_data_variable (); |
298 | *new_var = var; | |
b4f45d02 | 299 | |
300 | if (tail == NULL) | |
c1977dbe | 301 | d->var = new_var; |
b4f45d02 | 302 | else |
c1977dbe | 303 | tail->next = new_var; |
b4f45d02 | 304 | |
c1977dbe | 305 | tail = new_var; |
b4f45d02 | 306 | |
307 | if (gfc_match_char ('/') == MATCH_YES) | |
308 | break; | |
309 | if (gfc_match_char (',') != MATCH_YES) | |
310 | goto syntax; | |
311 | } | |
312 | ||
313 | return MATCH_YES; | |
314 | ||
315 | syntax: | |
316 | gfc_syntax_error (ST_DATA); | |
af29c1f0 | 317 | gfc_free_data_all (gfc_current_ns); |
b4f45d02 | 318 | return MATCH_ERROR; |
319 | } | |
320 | ||
321 | ||
322 | static match | |
1a9745d2 | 323 | match_data_constant (gfc_expr **result) |
b4f45d02 | 324 | { |
325 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
326 | gfc_symbol *sym; | |
327 | gfc_expr *expr; | |
328 | match m; | |
096d4ad9 | 329 | locus old_loc; |
b4f45d02 | 330 | |
331 | m = gfc_match_literal_constant (&expr, 1); | |
332 | if (m == MATCH_YES) | |
333 | { | |
334 | *result = expr; | |
335 | return MATCH_YES; | |
336 | } | |
337 | ||
338 | if (m == MATCH_ERROR) | |
339 | return MATCH_ERROR; | |
340 | ||
341 | m = gfc_match_null (result); | |
342 | if (m != MATCH_NO) | |
343 | return m; | |
344 | ||
096d4ad9 | 345 | old_loc = gfc_current_locus; |
346 | ||
347 | /* Should this be a structure component, try to match it | |
348 | before matching a name. */ | |
349 | m = gfc_match_rvalue (result); | |
350 | if (m == MATCH_ERROR) | |
351 | return m; | |
352 | ||
353 | if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE) | |
354 | { | |
355 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
356 | m = MATCH_ERROR; | |
357 | return m; | |
358 | } | |
359 | ||
360 | gfc_current_locus = old_loc; | |
361 | ||
b4f45d02 | 362 | m = gfc_match_name (name); |
363 | if (m != MATCH_YES) | |
364 | return m; | |
365 | ||
366 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
367 | return MATCH_ERROR; | |
368 | ||
369 | if (sym == NULL | |
370 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
371 | { | |
372 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
373 | name); | |
374 | return MATCH_ERROR; | |
375 | } | |
376 | else if (sym->attr.flavor == FL_DERIVED) | |
ea94d76d | 377 | return gfc_match_structure_constructor (sym, result, false); |
b4f45d02 | 378 | |
f0a51891 | 379 | /* Check to see if the value is an initialization array expression. */ |
380 | if (sym->value->expr_type == EXPR_ARRAY) | |
381 | { | |
382 | gfc_current_locus = old_loc; | |
383 | ||
384 | m = gfc_match_init_expr (result); | |
385 | if (m == MATCH_ERROR) | |
386 | return m; | |
387 | ||
388 | if (m == MATCH_YES) | |
389 | { | |
390 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
391 | m = MATCH_ERROR; | |
392 | ||
393 | if ((*result)->expr_type == EXPR_CONSTANT) | |
394 | return m; | |
395 | else | |
396 | { | |
397 | gfc_error ("Invalid initializer %s in Data statement at %C", name); | |
398 | return MATCH_ERROR; | |
399 | } | |
400 | } | |
401 | } | |
402 | ||
b4f45d02 | 403 | *result = gfc_copy_expr (sym->value); |
404 | return MATCH_YES; | |
405 | } | |
406 | ||
407 | ||
408 | /* Match a list of values in a DATA statement. The leading '/' has | |
409 | already been seen at this point. */ | |
410 | ||
411 | static match | |
1a9745d2 | 412 | top_val_list (gfc_data *data) |
b4f45d02 | 413 | { |
c1977dbe | 414 | gfc_data_value *new_val, *tail; |
b4f45d02 | 415 | gfc_expr *expr; |
b4f45d02 | 416 | match m; |
417 | ||
418 | tail = NULL; | |
419 | ||
420 | for (;;) | |
421 | { | |
422 | m = match_data_constant (&expr); | |
423 | if (m == MATCH_NO) | |
424 | goto syntax; | |
425 | if (m == MATCH_ERROR) | |
426 | return MATCH_ERROR; | |
427 | ||
c1977dbe | 428 | new_val = gfc_get_data_value (); |
429 | mpz_init (new_val->repeat); | |
b4f45d02 | 430 | |
431 | if (tail == NULL) | |
c1977dbe | 432 | data->value = new_val; |
b4f45d02 | 433 | else |
c1977dbe | 434 | tail->next = new_val; |
b4f45d02 | 435 | |
c1977dbe | 436 | tail = new_val; |
b4f45d02 | 437 | |
438 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
439 | { | |
440 | tail->expr = expr; | |
7d74abfd | 441 | mpz_set_ui (tail->repeat, 1); |
b4f45d02 | 442 | } |
443 | else | |
444 | { | |
7d74abfd | 445 | if (expr->ts.type == BT_INTEGER) |
446 | mpz_set (tail->repeat, expr->value.integer); | |
b4f45d02 | 447 | gfc_free_expr (expr); |
b4f45d02 | 448 | |
449 | m = match_data_constant (&tail->expr); | |
450 | if (m == MATCH_NO) | |
451 | goto syntax; | |
452 | if (m == MATCH_ERROR) | |
453 | return MATCH_ERROR; | |
454 | } | |
455 | ||
456 | if (gfc_match_char ('/') == MATCH_YES) | |
457 | break; | |
458 | if (gfc_match_char (',') == MATCH_NO) | |
459 | goto syntax; | |
460 | } | |
461 | ||
462 | return MATCH_YES; | |
463 | ||
464 | syntax: | |
465 | gfc_syntax_error (ST_DATA); | |
af29c1f0 | 466 | gfc_free_data_all (gfc_current_ns); |
b4f45d02 | 467 | return MATCH_ERROR; |
468 | } | |
469 | ||
470 | ||
471 | /* Matches an old style initialization. */ | |
472 | ||
473 | static match | |
474 | match_old_style_init (const char *name) | |
475 | { | |
476 | match m; | |
477 | gfc_symtree *st; | |
344b937e | 478 | gfc_symbol *sym; |
b4f45d02 | 479 | gfc_data *newdata; |
480 | ||
481 | /* Set up data structure to hold initializers. */ | |
482 | gfc_find_sym_tree (name, NULL, 0, &st); | |
344b937e | 483 | sym = st->n.sym; |
484 | ||
b4f45d02 | 485 | newdata = gfc_get_data (); |
486 | newdata->var = gfc_get_data_variable (); | |
487 | newdata->var->expr = gfc_get_variable_expr (st); | |
5aed5db3 | 488 | newdata->where = gfc_current_locus; |
b4f45d02 | 489 | |
f6d0e37a | 490 | /* Match initial value list. This also eats the terminal '/'. */ |
b4f45d02 | 491 | m = top_val_list (newdata); |
492 | if (m != MATCH_YES) | |
493 | { | |
494 | gfc_free (newdata); | |
495 | return m; | |
496 | } | |
497 | ||
498 | if (gfc_pure (NULL)) | |
499 | { | |
500 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
501 | gfc_free (newdata); | |
502 | return MATCH_ERROR; | |
503 | } | |
504 | ||
344b937e | 505 | /* Mark the variable as having appeared in a data statement. */ |
506 | if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) | |
507 | { | |
508 | gfc_free (newdata); | |
509 | return MATCH_ERROR; | |
510 | } | |
511 | ||
b4f45d02 | 512 | /* Chain in namespace list of DATA initializers. */ |
513 | newdata->next = gfc_current_ns->data; | |
514 | gfc_current_ns->data = newdata; | |
515 | ||
516 | return m; | |
517 | } | |
518 | ||
1a9745d2 | 519 | |
b4f45d02 | 520 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
39fca56b | 521 | we are matching a DATA statement and are therefore issuing an error |
e14bee04 | 522 | if we encounter something unexpected, if not, we're trying to match |
fe06c0d5 | 523 | an old-style initialization expression of the form INTEGER I /2/. */ |
b4f45d02 | 524 | |
525 | match | |
526 | gfc_match_data (void) | |
527 | { | |
c1977dbe | 528 | gfc_data *new_data; |
b4f45d02 | 529 | match m; |
530 | ||
cbbac028 | 531 | set_in_match_data (true); |
1bfea7e8 | 532 | |
b4f45d02 | 533 | for (;;) |
534 | { | |
c1977dbe | 535 | new_data = gfc_get_data (); |
536 | new_data->where = gfc_current_locus; | |
b4f45d02 | 537 | |
c1977dbe | 538 | m = top_var_list (new_data); |
b4f45d02 | 539 | if (m != MATCH_YES) |
540 | goto cleanup; | |
541 | ||
c1977dbe | 542 | m = top_val_list (new_data); |
b4f45d02 | 543 | if (m != MATCH_YES) |
544 | goto cleanup; | |
545 | ||
c1977dbe | 546 | new_data->next = gfc_current_ns->data; |
547 | gfc_current_ns->data = new_data; | |
b4f45d02 | 548 | |
549 | if (gfc_match_eos () == MATCH_YES) | |
550 | break; | |
551 | ||
552 | gfc_match_char (','); /* Optional comma */ | |
553 | } | |
554 | ||
cbbac028 | 555 | set_in_match_data (false); |
1bfea7e8 | 556 | |
b4f45d02 | 557 | if (gfc_pure (NULL)) |
558 | { | |
559 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
560 | return MATCH_ERROR; | |
561 | } | |
562 | ||
563 | return MATCH_YES; | |
564 | ||
565 | cleanup: | |
cbbac028 | 566 | set_in_match_data (false); |
c1977dbe | 567 | gfc_free_data (new_data); |
b4f45d02 | 568 | return MATCH_ERROR; |
569 | } | |
570 | ||
571 | ||
572 | /************************ Declaration statements *********************/ | |
573 | ||
e97ac7c0 | 574 | |
575 | /* Auxilliary function to merge DIMENSION and CODIMENSION array specs. */ | |
576 | ||
577 | static void | |
578 | merge_array_spec (gfc_array_spec *from, gfc_array_spec *to, bool copy) | |
579 | { | |
580 | int i; | |
581 | ||
582 | if (to->rank == 0 && from->rank > 0) | |
583 | { | |
584 | to->rank = from->rank; | |
585 | to->type = from->type; | |
586 | to->cray_pointee = from->cray_pointee; | |
587 | to->cp_was_assumed = from->cp_was_assumed; | |
588 | ||
589 | for (i = 0; i < to->corank; i++) | |
590 | { | |
591 | to->lower[from->rank + i] = to->lower[i]; | |
592 | to->upper[from->rank + i] = to->upper[i]; | |
593 | } | |
594 | for (i = 0; i < from->rank; i++) | |
595 | { | |
596 | if (copy) | |
597 | { | |
598 | to->lower[i] = gfc_copy_expr (from->lower[i]); | |
599 | to->upper[i] = gfc_copy_expr (from->upper[i]); | |
600 | } | |
601 | else | |
602 | { | |
603 | to->lower[i] = from->lower[i]; | |
604 | to->upper[i] = from->upper[i]; | |
605 | } | |
606 | } | |
607 | } | |
608 | else if (to->corank == 0 && from->corank > 0) | |
609 | { | |
610 | to->corank = from->corank; | |
611 | to->cotype = from->cotype; | |
612 | ||
613 | for (i = 0; i < from->corank; i++) | |
614 | { | |
615 | if (copy) | |
616 | { | |
617 | to->lower[to->rank + i] = gfc_copy_expr (from->lower[i]); | |
618 | to->upper[to->rank + i] = gfc_copy_expr (from->upper[i]); | |
619 | } | |
620 | else | |
621 | { | |
622 | to->lower[to->rank + i] = from->lower[i]; | |
623 | to->upper[to->rank + i] = from->upper[i]; | |
624 | } | |
625 | } | |
626 | } | |
627 | } | |
628 | ||
629 | ||
4ee9c684 | 630 | /* Match an intent specification. Since this can only happen after an |
631 | INTENT word, a legal intent-spec must follow. */ | |
632 | ||
633 | static sym_intent | |
634 | match_intent_spec (void) | |
635 | { | |
636 | ||
637 | if (gfc_match (" ( in out )") == MATCH_YES) | |
638 | return INTENT_INOUT; | |
639 | if (gfc_match (" ( in )") == MATCH_YES) | |
640 | return INTENT_IN; | |
641 | if (gfc_match (" ( out )") == MATCH_YES) | |
642 | return INTENT_OUT; | |
643 | ||
644 | gfc_error ("Bad INTENT specification at %C"); | |
645 | return INTENT_UNKNOWN; | |
646 | } | |
647 | ||
648 | ||
649 | /* Matches a character length specification, which is either a | |
650 | specification expression or a '*'. */ | |
651 | ||
652 | static match | |
1a9745d2 | 653 | char_len_param_value (gfc_expr **expr) |
4ee9c684 | 654 | { |
294d58d3 | 655 | match m; |
656 | ||
4ee9c684 | 657 | if (gfc_match_char ('*') == MATCH_YES) |
658 | { | |
659 | *expr = NULL; | |
660 | return MATCH_YES; | |
661 | } | |
662 | ||
294d58d3 | 663 | m = gfc_match_expr (expr); |
40de255b | 664 | |
665 | if (m == MATCH_YES | |
666 | && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE) | |
667 | return MATCH_ERROR; | |
668 | ||
294d58d3 | 669 | if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION) |
670 | { | |
671 | if ((*expr)->value.function.actual | |
672 | && (*expr)->value.function.actual->expr->symtree) | |
673 | { | |
674 | gfc_expr *e; | |
675 | e = (*expr)->value.function.actual->expr; | |
676 | if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE | |
677 | && e->expr_type == EXPR_VARIABLE) | |
678 | { | |
679 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) | |
680 | goto syntax; | |
681 | if (e->symtree->n.sym->ts.type == BT_CHARACTER | |
eeebe20b | 682 | && e->symtree->n.sym->ts.u.cl |
683 | && e->symtree->n.sym->ts.u.cl->length->ts.type == BT_UNKNOWN) | |
294d58d3 | 684 | goto syntax; |
685 | } | |
686 | } | |
687 | } | |
688 | return m; | |
689 | ||
690 | syntax: | |
691 | gfc_error ("Conflict in attributes of function argument at %C"); | |
692 | return MATCH_ERROR; | |
4ee9c684 | 693 | } |
694 | ||
695 | ||
696 | /* A character length is a '*' followed by a literal integer or a | |
697 | char_len_param_value in parenthesis. */ | |
698 | ||
699 | static match | |
1a9745d2 | 700 | match_char_length (gfc_expr **expr) |
4ee9c684 | 701 | { |
3bd3b616 | 702 | int length; |
4ee9c684 | 703 | match m; |
704 | ||
705 | m = gfc_match_char ('*'); | |
706 | if (m != MATCH_YES) | |
707 | return m; | |
708 | ||
3bd3b616 | 709 | m = gfc_match_small_literal_int (&length, NULL); |
4ee9c684 | 710 | if (m == MATCH_ERROR) |
711 | return m; | |
712 | ||
713 | if (m == MATCH_YES) | |
714 | { | |
8e9b41f0 | 715 | if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: " |
716 | "Old-style character length at %C") == FAILURE) | |
717 | return MATCH_ERROR; | |
126387b5 | 718 | *expr = gfc_get_int_expr (gfc_default_integer_kind, NULL, length); |
4ee9c684 | 719 | return m; |
720 | } | |
721 | ||
722 | if (gfc_match_char ('(') == MATCH_NO) | |
723 | goto syntax; | |
724 | ||
725 | m = char_len_param_value (expr); | |
077932f9 | 726 | if (m != MATCH_YES && gfc_matching_function) |
727 | { | |
728 | gfc_undo_symbols (); | |
729 | m = MATCH_YES; | |
730 | } | |
731 | ||
4ee9c684 | 732 | if (m == MATCH_ERROR) |
733 | return m; | |
734 | if (m == MATCH_NO) | |
735 | goto syntax; | |
736 | ||
737 | if (gfc_match_char (')') == MATCH_NO) | |
738 | { | |
739 | gfc_free_expr (*expr); | |
740 | *expr = NULL; | |
741 | goto syntax; | |
742 | } | |
743 | ||
744 | return MATCH_YES; | |
745 | ||
746 | syntax: | |
747 | gfc_error ("Syntax error in character length specification at %C"); | |
748 | return MATCH_ERROR; | |
749 | } | |
750 | ||
751 | ||
ee893be6 | 752 | /* Special subroutine for finding a symbol. Check if the name is found |
753 | in the current name space. If not, and we're compiling a function or | |
754 | subroutine and the parent compilation unit is an interface, then check | |
755 | to see if the name we've been given is the name of the interface | |
756 | (located in another namespace). */ | |
4ee9c684 | 757 | |
758 | static int | |
36b0a1b0 | 759 | find_special (const char *name, gfc_symbol **result, bool allow_subroutine) |
4ee9c684 | 760 | { |
761 | gfc_state_data *s; | |
36b0a1b0 | 762 | gfc_symtree *st; |
ee893be6 | 763 | int i; |
4ee9c684 | 764 | |
36b0a1b0 | 765 | i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine); |
e14bee04 | 766 | if (i == 0) |
36b0a1b0 | 767 | { |
768 | *result = st ? st->n.sym : NULL; | |
769 | goto end; | |
770 | } | |
e14bee04 | 771 | |
4ee9c684 | 772 | if (gfc_current_state () != COMP_SUBROUTINE |
773 | && gfc_current_state () != COMP_FUNCTION) | |
ee893be6 | 774 | goto end; |
4ee9c684 | 775 | |
776 | s = gfc_state_stack->previous; | |
777 | if (s == NULL) | |
ee893be6 | 778 | goto end; |
4ee9c684 | 779 | |
780 | if (s->state != COMP_INTERFACE) | |
ee893be6 | 781 | goto end; |
4ee9c684 | 782 | if (s->sym == NULL) |
f6d0e37a | 783 | goto end; /* Nameless interface. */ |
4ee9c684 | 784 | |
785 | if (strcmp (name, s->sym->name) == 0) | |
786 | { | |
787 | *result = s->sym; | |
788 | return 0; | |
789 | } | |
790 | ||
ee893be6 | 791 | end: |
792 | return i; | |
4ee9c684 | 793 | } |
794 | ||
795 | ||
796 | /* Special subroutine for getting a symbol node associated with a | |
797 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
798 | symbol is created in the parent using with symtree node in the | |
799 | child unit pointing to the symbol. If the current namespace has no | |
800 | parent, then the symbol is just created in the current unit. */ | |
801 | ||
802 | static int | |
1a9745d2 | 803 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
4ee9c684 | 804 | { |
805 | gfc_symtree *st; | |
806 | gfc_symbol *sym; | |
2ddb8ed9 | 807 | int rc = 0; |
4ee9c684 | 808 | |
d77f260f | 809 | /* Module functions have to be left in their own namespace because |
810 | they have potentially (almost certainly!) already been referenced. | |
811 | In this sense, they are rather like external functions. This is | |
812 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
813 | space is set to point to the master function, so that the fake | |
814 | result mechanism can work. */ | |
815 | if (module_fcn_entry) | |
861d824f | 816 | { |
817 | /* Present if entry is declared to be a module procedure. */ | |
818 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); | |
c6a05992 | 819 | |
861d824f | 820 | if (*result == NULL) |
821 | rc = gfc_get_symbol (name, NULL, result); | |
a78f714d | 822 | else if (!gfc_get_symbol (name, NULL, &sym) && sym |
c6a05992 | 823 | && (*result)->ts.type == BT_UNKNOWN |
824 | && sym->attr.flavor == FL_UNKNOWN) | |
825 | /* Pick up the typespec for the entry, if declared in the function | |
826 | body. Note that this symbol is FL_UNKNOWN because it will | |
827 | only have appeared in a type declaration. The local symtree | |
828 | is set to point to the module symbol and a unique symtree | |
829 | to the local version. This latter ensures a correct clearing | |
830 | of the symbols. */ | |
a78f714d | 831 | { |
832 | /* If the ENTRY proceeds its specification, we need to ensure | |
833 | that this does not raise a "has no IMPLICIT type" error. */ | |
834 | if (sym->ts.type == BT_UNKNOWN) | |
2168078b | 835 | sym->attr.untyped = 1; |
a78f714d | 836 | |
2168078b | 837 | (*result)->ts = sym->ts; |
a78f714d | 838 | |
839 | /* Put the symbol in the procedure namespace so that, should | |
69b1505f | 840 | the ENTRY precede its specification, the specification |
a78f714d | 841 | can be applied. */ |
842 | (*result)->ns = gfc_current_ns; | |
843 | ||
844 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); | |
845 | st->n.sym = *result; | |
846 | st = gfc_get_unique_symtree (gfc_current_ns); | |
847 | st->n.sym = sym; | |
848 | } | |
861d824f | 849 | } |
858f9894 | 850 | else |
851 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
4ee9c684 | 852 | |
2ddb8ed9 | 853 | if (rc) |
854 | return rc; | |
855 | ||
858f9894 | 856 | sym = *result; |
c717e399 | 857 | gfc_current_ns->refs++; |
4ee9c684 | 858 | |
c1977dbe | 859 | if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE) |
858f9894 | 860 | { |
16f49153 | 861 | /* Trap another encompassed procedure with the same name. All |
862 | these conditions are necessary to avoid picking up an entry | |
863 | whose name clashes with that of the encompassing procedure; | |
864 | this is handled using gsymbols to register unique,globally | |
865 | accessible names. */ | |
858f9894 | 866 | if (sym->attr.flavor != 0 |
1a9745d2 | 867 | && sym->attr.proc != 0 |
868 | && (sym->attr.subroutine || sym->attr.function) | |
869 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
858f9894 | 870 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
871 | name, &sym->declared_at); | |
872 | ||
5720fd2f | 873 | /* Trap a procedure with a name the same as interface in the |
874 | encompassing scope. */ | |
875 | if (sym->attr.generic != 0 | |
db697236 | 876 | && (sym->attr.subroutine || sym->attr.function) |
877 | && !sym->attr.mod_proc) | |
5720fd2f | 878 | gfc_error_now ("Name '%s' at %C is already defined" |
879 | " as a generic interface at %L", | |
880 | name, &sym->declared_at); | |
881 | ||
858f9894 | 882 | /* Trap declarations of attributes in encompassing scope. The |
883 | signature for this is that ts.kind is set. Legitimate | |
884 | references only set ts.type. */ | |
885 | if (sym->ts.kind != 0 | |
1a9745d2 | 886 | && !sym->attr.implicit_type |
887 | && sym->attr.proc == 0 | |
888 | && gfc_current_ns->parent != NULL | |
889 | && sym->attr.access == 0 | |
890 | && !module_fcn_entry) | |
891 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
892 | "and must not have attributes declared at %L", | |
858f9894 | 893 | name, &sym->declared_at); |
894 | } | |
895 | ||
896 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
897 | return rc; | |
4ee9c684 | 898 | |
d77f260f | 899 | /* Module function entries will already have a symtree in |
900 | the current namespace but will need one at module level. */ | |
901 | if (module_fcn_entry) | |
861d824f | 902 | { |
903 | /* Present if entry is declared to be a module procedure. */ | |
904 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); | |
905 | if (st == NULL) | |
906 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
907 | } | |
d77f260f | 908 | else |
909 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
4ee9c684 | 910 | |
4ee9c684 | 911 | st->n.sym = sym; |
912 | sym->refs++; | |
913 | ||
f6d0e37a | 914 | /* See if the procedure should be a module procedure. */ |
4ee9c684 | 915 | |
d77f260f | 916 | if (((sym->ns->proc_name != NULL |
861d824f | 917 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
918 | && sym->attr.proc != PROC_MODULE) | |
919 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) | |
920 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
921 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 922 | rc = 2; |
923 | ||
924 | return rc; | |
925 | } | |
926 | ||
927 | ||
c5d33754 | 928 | /* Verify that the given symbol representing a parameter is C |
929 | interoperable, by checking to see if it was marked as such after | |
930 | its declaration. If the given symbol is not interoperable, a | |
931 | warning is reported, thus removing the need to return the status to | |
932 | the calling function. The standard does not require the user use | |
933 | one of the iso_c_binding named constants to declare an | |
934 | interoperable parameter, but we can't be sure if the param is C | |
935 | interop or not if the user doesn't. For example, integer(4) may be | |
936 | legal Fortran, but doesn't have meaning in C. It may interop with | |
937 | a number of the C types, which causes a problem because the | |
938 | compiler can't know which one. This code is almost certainly not | |
939 | portable, and the user will get what they deserve if the C type | |
940 | across platforms isn't always interoperable with integer(4). If | |
941 | the user had used something like integer(c_int) or integer(c_long), | |
942 | the compiler could have automatically handled the varying sizes | |
943 | across platforms. */ | |
944 | ||
f6bb8f4b | 945 | gfc_try |
c5d33754 | 946 | verify_c_interop_param (gfc_symbol *sym) |
947 | { | |
948 | int is_c_interop = 0; | |
f6bb8f4b | 949 | gfc_try retval = SUCCESS; |
c5d33754 | 950 | |
951 | /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). | |
952 | Don't repeat the checks here. */ | |
953 | if (sym->attr.implicit_type) | |
954 | return SUCCESS; | |
955 | ||
956 | /* For subroutines or functions that are passed to a BIND(C) procedure, | |
957 | they're interoperable if they're BIND(C) and their params are all | |
958 | interoperable. */ | |
959 | if (sym->attr.flavor == FL_PROCEDURE) | |
960 | { | |
961 | if (sym->attr.is_bind_c == 0) | |
962 | { | |
963 | gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " | |
964 | "attribute to be C interoperable", sym->name, | |
965 | &(sym->declared_at)); | |
966 | ||
967 | return FAILURE; | |
968 | } | |
969 | else | |
970 | { | |
971 | if (sym->attr.is_c_interop == 1) | |
972 | /* We've already checked this procedure; don't check it again. */ | |
973 | return SUCCESS; | |
974 | else | |
975 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, | |
976 | sym->common_block); | |
977 | } | |
978 | } | |
979 | ||
980 | /* See if we've stored a reference to a procedure that owns sym. */ | |
981 | if (sym->ns != NULL && sym->ns->proc_name != NULL) | |
982 | { | |
983 | if (sym->ns->proc_name->attr.is_bind_c == 1) | |
984 | { | |
985 | is_c_interop = | |
209d3778 | 986 | (verify_c_interop (&(sym->ts)) |
c5d33754 | 987 | == SUCCESS ? 1 : 0); |
988 | ||
989 | if (is_c_interop != 1) | |
990 | { | |
991 | /* Make personalized messages to give better feedback. */ | |
992 | if (sym->ts.type == BT_DERIVED) | |
993 | gfc_error ("Type '%s' at %L is a parameter to the BIND(C) " | |
5f9b1308 | 994 | "procedure '%s' but is not C interoperable " |
c5d33754 | 995 | "because derived type '%s' is not C interoperable", |
996 | sym->name, &(sym->declared_at), | |
997 | sym->ns->proc_name->name, | |
eeebe20b | 998 | sym->ts.u.derived->name); |
c5d33754 | 999 | else |
1000 | gfc_warning ("Variable '%s' at %L is a parameter to the " | |
1001 | "BIND(C) procedure '%s' but may not be C " | |
1002 | "interoperable", | |
1003 | sym->name, &(sym->declared_at), | |
1004 | sym->ns->proc_name->name); | |
1005 | } | |
e4eda3ec | 1006 | |
1007 | /* Character strings are only C interoperable if they have a | |
1008 | length of 1. */ | |
1009 | if (sym->ts.type == BT_CHARACTER) | |
1010 | { | |
eeebe20b | 1011 | gfc_charlen *cl = sym->ts.u.cl; |
e4eda3ec | 1012 | if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT |
1013 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) | |
1014 | { | |
1015 | gfc_error ("Character argument '%s' at %L " | |
1016 | "must be length 1 because " | |
1017 | "procedure '%s' is BIND(C)", | |
1018 | sym->name, &sym->declared_at, | |
1019 | sym->ns->proc_name->name); | |
1020 | retval = FAILURE; | |
1021 | } | |
1022 | } | |
1023 | ||
c5d33754 | 1024 | /* We have to make sure that any param to a bind(c) routine does |
1025 | not have the allocatable, pointer, or optional attributes, | |
1026 | according to J3/04-007, section 5.1. */ | |
1027 | if (sym->attr.allocatable == 1) | |
1028 | { | |
1029 | gfc_error ("Variable '%s' at %L cannot have the " | |
1030 | "ALLOCATABLE attribute because procedure '%s'" | |
1031 | " is BIND(C)", sym->name, &(sym->declared_at), | |
1032 | sym->ns->proc_name->name); | |
1033 | retval = FAILURE; | |
1034 | } | |
1035 | ||
1036 | if (sym->attr.pointer == 1) | |
1037 | { | |
1038 | gfc_error ("Variable '%s' at %L cannot have the " | |
1039 | "POINTER attribute because procedure '%s'" | |
1040 | " is BIND(C)", sym->name, &(sym->declared_at), | |
1041 | sym->ns->proc_name->name); | |
1042 | retval = FAILURE; | |
1043 | } | |
1044 | ||
1045 | if (sym->attr.optional == 1) | |
1046 | { | |
1047 | gfc_error ("Variable '%s' at %L cannot have the " | |
1048 | "OPTIONAL attribute because procedure '%s'" | |
1049 | " is BIND(C)", sym->name, &(sym->declared_at), | |
1050 | sym->ns->proc_name->name); | |
1051 | retval = FAILURE; | |
1052 | } | |
1053 | ||
1054 | /* Make sure that if it has the dimension attribute, that it is | |
1055 | either assumed size or explicit shape. */ | |
1056 | if (sym->as != NULL) | |
1057 | { | |
1058 | if (sym->as->type == AS_ASSUMED_SHAPE) | |
1059 | { | |
1060 | gfc_error ("Assumed-shape array '%s' at %L cannot be an " | |
1061 | "argument to the procedure '%s' at %L because " | |
1062 | "the procedure is BIND(C)", sym->name, | |
1063 | &(sym->declared_at), sym->ns->proc_name->name, | |
1064 | &(sym->ns->proc_name->declared_at)); | |
1065 | retval = FAILURE; | |
1066 | } | |
1067 | ||
1068 | if (sym->as->type == AS_DEFERRED) | |
1069 | { | |
1070 | gfc_error ("Deferred-shape array '%s' at %L cannot be an " | |
1071 | "argument to the procedure '%s' at %L because " | |
1072 | "the procedure is BIND(C)", sym->name, | |
1073 | &(sym->declared_at), sym->ns->proc_name->name, | |
1074 | &(sym->ns->proc_name->declared_at)); | |
1075 | retval = FAILURE; | |
1076 | } | |
1077 | } | |
1078 | } | |
1079 | } | |
1080 | ||
1081 | return retval; | |
1082 | } | |
1083 | ||
1084 | ||
1de1b1a9 | 1085 | |
c5d33754 | 1086 | /* Function called by variable_decl() that adds a name to the symbol table. */ |
4ee9c684 | 1087 | |
f6bb8f4b | 1088 | static gfc_try |
1a9745d2 | 1089 | build_sym (const char *name, gfc_charlen *cl, |
1090 | gfc_array_spec **as, locus *var_locus) | |
4ee9c684 | 1091 | { |
1092 | symbol_attribute attr; | |
1093 | gfc_symbol *sym; | |
1094 | ||
ee893be6 | 1095 | if (gfc_get_symbol (name, NULL, &sym)) |
4ee9c684 | 1096 | return FAILURE; |
1097 | ||
f6d0e37a | 1098 | /* Start updating the symbol table. Add basic type attribute if present. */ |
4ee9c684 | 1099 | if (current_ts.type != BT_UNKNOWN |
1a9745d2 | 1100 | && (sym->attr.implicit_type == 0 |
1101 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
4ee9c684 | 1102 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
1103 | return FAILURE; | |
1104 | ||
1105 | if (sym->ts.type == BT_CHARACTER) | |
eeebe20b | 1106 | sym->ts.u.cl = cl; |
4ee9c684 | 1107 | |
1108 | /* Add dimension attribute if present. */ | |
1109 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
1110 | return FAILURE; | |
1111 | *as = NULL; | |
1112 | ||
1113 | /* Add attribute to symbol. The copy is so that we can reset the | |
1114 | dimension attribute. */ | |
1115 | attr = current_attr; | |
1116 | attr.dimension = 0; | |
aff518b0 | 1117 | attr.codimension = 0; |
4ee9c684 | 1118 | |
1119 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
1120 | return FAILURE; | |
1121 | ||
c5d33754 | 1122 | /* Finish any work that may need to be done for the binding label, |
1123 | if it's a bind(c). The bind(c) attr is found before the symbol | |
1124 | is made, and before the symbol name (for data decls), so the | |
1125 | current_ts is holding the binding label, or nothing if the | |
1126 | name= attr wasn't given. Therefore, test here if we're dealing | |
1127 | with a bind(c) and make sure the binding label is set correctly. */ | |
1128 | if (sym->attr.is_bind_c == 1) | |
1129 | { | |
1130 | if (sym->binding_label[0] == '\0') | |
1131 | { | |
825718f9 | 1132 | /* Set the binding label and verify that if a NAME= was specified |
1133 | then only one identifier was in the entity-decl-list. */ | |
1134 | if (set_binding_label (sym->binding_label, sym->name, | |
1135 | num_idents_on_line) == FAILURE) | |
c5d33754 | 1136 | return FAILURE; |
1137 | } | |
1138 | } | |
1139 | ||
1140 | /* See if we know we're in a common block, and if it's a bind(c) | |
1141 | common then we need to make sure we're an interoperable type. */ | |
1142 | if (sym->attr.in_common == 1) | |
1143 | { | |
1144 | /* Test the common block object. */ | |
1145 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 | |
1146 | && sym->ts.is_c_interop != 1) | |
1147 | { | |
1148 | gfc_error_now ("Variable '%s' in common block '%s' at %C " | |
1149 | "must be declared with a C interoperable " | |
1150 | "kind since common block '%s' is BIND(C)", | |
1151 | sym->name, sym->common_block->name, | |
1152 | sym->common_block->name); | |
1153 | gfc_clear_error (); | |
1154 | } | |
1155 | } | |
1156 | ||
2457a77e | 1157 | sym->attr.implied_index = 0; |
1158 | ||
a33fbb6f | 1159 | if (sym->ts.type == BT_CLASS |
1160 | && (sym->attr.class_ok = sym->attr.dummy || sym->attr.pointer | |
1161 | || sym->attr.allocatable)) | |
1162 | gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as, false); | |
1de1b1a9 | 1163 | |
4ee9c684 | 1164 | return SUCCESS; |
1165 | } | |
1166 | ||
1a9745d2 | 1167 | |
a270dc8e | 1168 | /* Set character constant to the given length. The constant will be padded or |
d1a39099 | 1169 | truncated. If we're inside an array constructor without a typespec, we |
1170 | additionally check that all elements have the same length; check_len -1 | |
1171 | means no checking. */ | |
a270dc8e | 1172 | |
1173 | void | |
d1a39099 | 1174 | gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len) |
a270dc8e | 1175 | { |
c32f863c | 1176 | gfc_char_t *s; |
a270dc8e | 1177 | int slen; |
1178 | ||
1179 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
b44437b9 | 1180 | gcc_assert (expr->ts.type == BT_CHARACTER); |
a270dc8e | 1181 | |
1182 | slen = expr->value.character.length; | |
1183 | if (len != slen) | |
1184 | { | |
c32f863c | 1185 | s = gfc_get_wide_string (len + 1); |
1186 | memcpy (s, expr->value.character.string, | |
1187 | MIN (len, slen) * sizeof (gfc_char_t)); | |
a270dc8e | 1188 | if (len > slen) |
c32f863c | 1189 | gfc_wide_memset (&s[slen], ' ', len - slen); |
1bfea7e8 | 1190 | |
1191 | if (gfc_option.warn_character_truncation && slen > len) | |
1192 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
1193 | "(%d/%d)", &expr->where, slen, len); | |
1194 | ||
1195 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
1196 | initializers. */ | |
d1a39099 | 1197 | if (check_len != -1 && slen != check_len |
1198 | && !(gfc_option.allow_std & GFC_STD_GNU)) | |
1bfea7e8 | 1199 | gfc_error_now ("The CHARACTER elements of the array constructor " |
1200 | "at %L must have the same length (%d/%d)", | |
d1a39099 | 1201 | &expr->where, slen, check_len); |
1bfea7e8 | 1202 | |
89f528df | 1203 | s[len] = '\0'; |
a270dc8e | 1204 | gfc_free (expr->value.character.string); |
1205 | expr->value.character.string = s; | |
1206 | expr->value.character.length = len; | |
1207 | } | |
1208 | } | |
4ee9c684 | 1209 | |
3b6a4b41 | 1210 | |
e14bee04 | 1211 | /* Function to create and update the enumerator history |
3b6a4b41 | 1212 | using the information passed as arguments. |
e14bee04 | 1213 | Pointer "max_enum" is also updated, to point to |
1214 | enum history node containing largest initializer. | |
3b6a4b41 | 1215 | |
1216 | SYM points to the symbol node of enumerator. | |
f6d0e37a | 1217 | INIT points to its enumerator value. */ |
3b6a4b41 | 1218 | |
e14bee04 | 1219 | static void |
1a9745d2 | 1220 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
3b6a4b41 | 1221 | { |
1222 | enumerator_history *new_enum_history; | |
1223 | gcc_assert (sym != NULL && init != NULL); | |
1224 | ||
48d8ad5a | 1225 | new_enum_history = XCNEW (enumerator_history); |
3b6a4b41 | 1226 | |
1227 | new_enum_history->sym = sym; | |
1228 | new_enum_history->initializer = init; | |
1229 | new_enum_history->next = NULL; | |
1230 | ||
1231 | if (enum_history == NULL) | |
1232 | { | |
1233 | enum_history = new_enum_history; | |
1234 | max_enum = enum_history; | |
1235 | } | |
1236 | else | |
1237 | { | |
1238 | new_enum_history->next = enum_history; | |
1239 | enum_history = new_enum_history; | |
1240 | ||
e14bee04 | 1241 | if (mpz_cmp (max_enum->initializer->value.integer, |
3b6a4b41 | 1242 | new_enum_history->initializer->value.integer) < 0) |
1a9745d2 | 1243 | max_enum = new_enum_history; |
3b6a4b41 | 1244 | } |
1245 | } | |
1246 | ||
1247 | ||
e14bee04 | 1248 | /* Function to free enum kind history. */ |
3b6a4b41 | 1249 | |
e14bee04 | 1250 | void |
1a9745d2 | 1251 | gfc_free_enum_history (void) |
3b6a4b41 | 1252 | { |
e14bee04 | 1253 | enumerator_history *current = enum_history; |
1254 | enumerator_history *next; | |
3b6a4b41 | 1255 | |
1256 | while (current != NULL) | |
1257 | { | |
1258 | next = current->next; | |
1259 | gfc_free (current); | |
1260 | current = next; | |
1261 | } | |
1262 | max_enum = NULL; | |
1263 | enum_history = NULL; | |
1264 | } | |
1265 | ||
1266 | ||
4ee9c684 | 1267 | /* Function called by variable_decl() that adds an initialization |
1268 | expression to a symbol. */ | |
1269 | ||
f6bb8f4b | 1270 | static gfc_try |
f6d0e37a | 1271 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) |
4ee9c684 | 1272 | { |
1273 | symbol_attribute attr; | |
1274 | gfc_symbol *sym; | |
1275 | gfc_expr *init; | |
1276 | ||
1277 | init = *initp; | |
36b0a1b0 | 1278 | if (find_special (name, &sym, false)) |
4ee9c684 | 1279 | return FAILURE; |
1280 | ||
1281 | attr = sym->attr; | |
1282 | ||
1283 | /* If this symbol is confirming an implicit parameter type, | |
1284 | then an initialization expression is not allowed. */ | |
1285 | if (attr.flavor == FL_PARAMETER | |
1286 | && sym->value != NULL | |
1287 | && *initp != NULL) | |
1288 | { | |
1289 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
1290 | sym->name); | |
1291 | return FAILURE; | |
1292 | } | |
1293 | ||
1294 | if (init == NULL) | |
1295 | { | |
1296 | /* An initializer is required for PARAMETER declarations. */ | |
1297 | if (attr.flavor == FL_PARAMETER) | |
1298 | { | |
1299 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
1300 | return FAILURE; | |
1301 | } | |
1302 | } | |
1303 | else | |
1304 | { | |
1305 | /* If a variable appears in a DATA block, it cannot have an | |
b97f1a18 | 1306 | initializer. */ |
4ee9c684 | 1307 | if (sym->attr.data) |
1308 | { | |
1a9745d2 | 1309 | gfc_error ("Variable '%s' at %C with an initializer already " |
1310 | "appears in a DATA statement", sym->name); | |
4ee9c684 | 1311 | return FAILURE; |
1312 | } | |
1313 | ||
cca3db55 | 1314 | /* Check if the assignment can happen. This has to be put off |
1315 | until later for a derived type variable. */ | |
4ee9c684 | 1316 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
1de1b1a9 | 1317 | && sym->ts.type != BT_CLASS && init->ts.type != BT_CLASS |
4ee9c684 | 1318 | && gfc_check_assign_symbol (sym, init) == FAILURE) |
1319 | return FAILURE; | |
1320 | ||
eeebe20b | 1321 | if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl |
da540712 | 1322 | && init->ts.type == BT_CHARACTER) |
a270dc8e | 1323 | { |
1324 | /* Update symbol character length according initializer. */ | |
da540712 | 1325 | if (gfc_check_assign_symbol (sym, init) == FAILURE) |
1326 | return FAILURE; | |
1327 | ||
eeebe20b | 1328 | if (sym->ts.u.cl->length == NULL) |
a270dc8e | 1329 | { |
03c2a028 | 1330 | int clen; |
f6d0e37a | 1331 | /* If there are multiple CHARACTER variables declared on the |
1332 | same line, we don't want them to share the same length. */ | |
d270ce52 | 1333 | sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
e9c873a4 | 1334 | |
03c2a028 | 1335 | if (sym->attr.flavor == FL_PARAMETER) |
1336 | { | |
1337 | if (init->expr_type == EXPR_CONSTANT) | |
1338 | { | |
1339 | clen = init->value.character.length; | |
126387b5 | 1340 | sym->ts.u.cl->length |
1341 | = gfc_get_int_expr (gfc_default_integer_kind, | |
1342 | NULL, clen); | |
03c2a028 | 1343 | } |
1344 | else if (init->expr_type == EXPR_ARRAY) | |
1345 | { | |
126387b5 | 1346 | gfc_constructor *c; |
1347 | c = gfc_constructor_first (init->value.constructor); | |
1348 | clen = c->expr->value.character.length; | |
1349 | sym->ts.u.cl->length | |
1350 | = gfc_get_int_expr (gfc_default_integer_kind, | |
1351 | NULL, clen); | |
03c2a028 | 1352 | } |
eeebe20b | 1353 | else if (init->ts.u.cl && init->ts.u.cl->length) |
1354 | sym->ts.u.cl->length = | |
1355 | gfc_copy_expr (sym->value->ts.u.cl->length); | |
03c2a028 | 1356 | } |
a270dc8e | 1357 | } |
1358 | /* Update initializer character length according symbol. */ | |
eeebe20b | 1359 | else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT) |
a270dc8e | 1360 | { |
eeebe20b | 1361 | int len = mpz_get_si (sym->ts.u.cl->length->value.integer); |
a270dc8e | 1362 | |
1363 | if (init->expr_type == EXPR_CONSTANT) | |
d1a39099 | 1364 | gfc_set_constant_character_len (len, init, -1); |
a270dc8e | 1365 | else if (init->expr_type == EXPR_ARRAY) |
1366 | { | |
126387b5 | 1367 | gfc_constructor *c; |
1368 | ||
39908fd9 | 1369 | /* Build a new charlen to prevent simplification from |
1370 | deleting the length before it is resolved. */ | |
d270ce52 | 1371 | init->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
eeebe20b | 1372 | init->ts.u.cl->length = gfc_copy_expr (sym->ts.u.cl->length); |
39908fd9 | 1373 | |
126387b5 | 1374 | for (c = gfc_constructor_first (init->value.constructor); |
1375 | c; c = gfc_constructor_next (c)) | |
1376 | gfc_set_constant_character_len (len, c->expr, -1); | |
a270dc8e | 1377 | } |
1378 | } | |
1379 | } | |
1380 | ||
ae2864a8 | 1381 | /* If sym is implied-shape, set its upper bounds from init. */ |
1382 | if (sym->attr.flavor == FL_PARAMETER && sym->attr.dimension | |
1383 | && sym->as->type == AS_IMPLIED_SHAPE) | |
1384 | { | |
1385 | int dim; | |
1386 | ||
1387 | if (init->rank == 0) | |
1388 | { | |
1389 | gfc_error ("Can't initialize implied-shape array at %L" | |
1390 | " with scalar", &sym->declared_at); | |
1391 | return FAILURE; | |
1392 | } | |
1393 | gcc_assert (sym->as->rank == init->rank); | |
1394 | ||
1395 | /* Shape should be present, we get an initialization expression. */ | |
1396 | gcc_assert (init->shape); | |
1397 | ||
1398 | for (dim = 0; dim < sym->as->rank; ++dim) | |
1399 | { | |
1400 | int k; | |
1401 | gfc_expr* lower; | |
1402 | gfc_expr* e; | |
1403 | ||
1404 | lower = sym->as->lower[dim]; | |
1405 | if (lower->expr_type != EXPR_CONSTANT) | |
1406 | { | |
1407 | gfc_error ("Non-constant lower bound in implied-shape" | |
1408 | " declaration at %L", &lower->where); | |
1409 | return FAILURE; | |
1410 | } | |
1411 | ||
1412 | /* All dimensions must be without upper bound. */ | |
1413 | gcc_assert (!sym->as->upper[dim]); | |
1414 | ||
1415 | k = lower->ts.kind; | |
1416 | e = gfc_get_constant_expr (BT_INTEGER, k, &sym->declared_at); | |
1417 | mpz_add (e->value.integer, | |
1418 | lower->value.integer, init->shape[dim]); | |
1419 | mpz_sub_ui (e->value.integer, e->value.integer, 1); | |
1420 | sym->as->upper[dim] = e; | |
1421 | } | |
1422 | ||
1423 | sym->as->type = AS_EXPLICIT; | |
1424 | } | |
1425 | ||
c5d33754 | 1426 | /* Need to check if the expression we initialized this |
1427 | to was one of the iso_c_binding named constants. If so, | |
1428 | and we're a parameter (constant), let it be iso_c. | |
1429 | For example: | |
1430 | integer(c_int), parameter :: my_int = c_int | |
1431 | integer(my_int) :: my_int_2 | |
1432 | If we mark my_int as iso_c (since we can see it's value | |
1433 | is equal to one of the named constants), then my_int_2 | |
1434 | will be considered C interoperable. */ | |
1435 | if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) | |
1436 | { | |
1437 | sym->ts.is_iso_c |= init->ts.is_iso_c; | |
1438 | sym->ts.is_c_interop |= init->ts.is_c_interop; | |
1439 | /* attr bits needed for module files. */ | |
1440 | sym->attr.is_iso_c |= init->ts.is_iso_c; | |
1441 | sym->attr.is_c_interop |= init->ts.is_c_interop; | |
1442 | if (init->ts.is_iso_c) | |
1443 | sym->ts.f90_type = init->ts.f90_type; | |
1444 | } | |
126387b5 | 1445 | |
4ee9c684 | 1446 | /* Add initializer. Make sure we keep the ranks sane. */ |
1447 | if (sym->attr.dimension && init->rank == 0) | |
7baa3fb4 | 1448 | { |
1449 | mpz_t size; | |
1450 | gfc_expr *array; | |
7baa3fb4 | 1451 | int n; |
1452 | if (sym->attr.flavor == FL_PARAMETER | |
1453 | && init->expr_type == EXPR_CONSTANT | |
1454 | && spec_size (sym->as, &size) == SUCCESS | |
1455 | && mpz_cmp_si (size, 0) > 0) | |
1456 | { | |
126387b5 | 1457 | array = gfc_get_array_expr (init->ts.type, init->ts.kind, |
1458 | &init->where); | |
7baa3fb4 | 1459 | for (n = 0; n < (int)mpz_get_si (size); n++) |
126387b5 | 1460 | gfc_constructor_append_expr (&array->value.constructor, |
1461 | n == 0 | |
1462 | ? init | |
1463 | : gfc_copy_expr (init), | |
1464 | &init->where); | |
1465 | ||
7baa3fb4 | 1466 | array->shape = gfc_get_shape (sym->as->rank); |
1467 | for (n = 0; n < sym->as->rank; n++) | |
1468 | spec_dimen_size (sym->as, n, &array->shape[n]); | |
1469 | ||
1470 | init = array; | |
1471 | mpz_clear (size); | |
1472 | } | |
1473 | init->rank = sym->as->rank; | |
1474 | } | |
4ee9c684 | 1475 | |
1476 | sym->value = init; | |
3cd3c667 | 1477 | if (sym->attr.save == SAVE_NONE) |
1478 | sym->attr.save = SAVE_IMPLICIT; | |
4ee9c684 | 1479 | *initp = NULL; |
1480 | } | |
1481 | ||
1482 | return SUCCESS; | |
1483 | } | |
1484 | ||
1485 | ||
1486 | /* Function called by variable_decl() that adds a name to a structure | |
1487 | being built. */ | |
1488 | ||
f6bb8f4b | 1489 | static gfc_try |
1a9745d2 | 1490 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
1491 | gfc_array_spec **as) | |
4ee9c684 | 1492 | { |
1493 | gfc_component *c; | |
b3704193 | 1494 | gfc_try t = SUCCESS; |
4ee9c684 | 1495 | |
53d2e124 | 1496 | /* F03:C438/C439. If the current symbol is of the same derived type that we're |
4ee9c684 | 1497 | constructing, it must have the pointer attribute. */ |
53d2e124 | 1498 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
eeebe20b | 1499 | && current_ts.u.derived == gfc_current_block () |
4ee9c684 | 1500 | && current_attr.pointer == 0) |
1501 | { | |
1502 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1503 | return FAILURE; | |
1504 | } | |
1505 | ||
1a9745d2 | 1506 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
4ee9c684 | 1507 | { |
1508 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1509 | { | |
1510 | gfc_error ("Array component of structure at %C must have explicit " | |
1511 | "or deferred shape"); | |
1512 | return FAILURE; | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1517 | return FAILURE; | |
1518 | ||
1519 | c->ts = current_ts; | |
eeebe20b | 1520 | if (c->ts.type == BT_CHARACTER) |
1521 | c->ts.u.cl = cl; | |
3be2b8d5 | 1522 | c->attr = current_attr; |
4ee9c684 | 1523 | |
1524 | c->initializer = *init; | |
1525 | *init = NULL; | |
1526 | ||
1527 | c->as = *as; | |
1528 | if (c->as != NULL) | |
aff518b0 | 1529 | { |
1530 | if (c->as->corank) | |
1531 | c->attr.codimension = 1; | |
1532 | if (c->as->rank) | |
1533 | c->attr.dimension = 1; | |
1534 | } | |
4ee9c684 | 1535 | *as = NULL; |
1536 | ||
a2f51d5f | 1537 | /* Should this ever get more complicated, combine with similar section |
1538 | in add_init_expr_to_sym into a separate function. */ | |
eeebe20b | 1539 | if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.u.cl |
1540 | && c->ts.u.cl->length && c->ts.u.cl->length->expr_type == EXPR_CONSTANT) | |
a2f51d5f | 1541 | { |
d1a39099 | 1542 | int len; |
1543 | ||
eeebe20b | 1544 | gcc_assert (c->ts.u.cl && c->ts.u.cl->length); |
1545 | gcc_assert (c->ts.u.cl->length->expr_type == EXPR_CONSTANT); | |
1546 | gcc_assert (c->ts.u.cl->length->ts.type == BT_INTEGER); | |
d1a39099 | 1547 | |
eeebe20b | 1548 | len = mpz_get_si (c->ts.u.cl->length->value.integer); |
a2f51d5f | 1549 | |
1550 | if (c->initializer->expr_type == EXPR_CONSTANT) | |
d1a39099 | 1551 | gfc_set_constant_character_len (len, c->initializer, -1); |
eeebe20b | 1552 | else if (mpz_cmp (c->ts.u.cl->length->value.integer, |
1553 | c->initializer->ts.u.cl->length->value.integer)) | |
a2f51d5f | 1554 | { |
126387b5 | 1555 | gfc_constructor *ctor; |
1556 | ctor = gfc_constructor_first (c->initializer->value.constructor); | |
d1a39099 | 1557 | |
6e4faf80 | 1558 | if (ctor) |
d1a39099 | 1559 | { |
6e4faf80 | 1560 | int first_len; |
126387b5 | 1561 | bool has_ts = (c->initializer->ts.u.cl |
1562 | && c->initializer->ts.u.cl->length_from_typespec); | |
6e4faf80 | 1563 | |
1564 | /* Remember the length of the first element for checking | |
1565 | that all elements *in the constructor* have the same | |
1566 | length. This need not be the length of the LHS! */ | |
1567 | gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT); | |
1568 | gcc_assert (ctor->expr->ts.type == BT_CHARACTER); | |
1569 | first_len = ctor->expr->value.character.length; | |
1570 | ||
126387b5 | 1571 | for ( ; ctor; ctor = gfc_constructor_next (ctor)) |
1572 | if (ctor->expr->expr_type == EXPR_CONSTANT) | |
d1a39099 | 1573 | { |
126387b5 | 1574 | gfc_set_constant_character_len (len, ctor->expr, |
1575 | has_ts ? -1 : first_len); | |
1576 | ctor->expr->ts.u.cl->length = gfc_copy_expr (c->ts.u.cl->length); | |
d1a39099 | 1577 | } |
d1a39099 | 1578 | } |
a2f51d5f | 1579 | } |
1580 | } | |
1581 | ||
4ee9c684 | 1582 | /* Check array components. */ |
3be2b8d5 | 1583 | if (!c->attr.dimension) |
b3704193 | 1584 | goto scalar; |
4ee9c684 | 1585 | |
3be2b8d5 | 1586 | if (c->attr.pointer) |
4ee9c684 | 1587 | { |
1588 | if (c->as->type != AS_DEFERRED) | |
1589 | { | |
2294b616 | 1590 | gfc_error ("Pointer array component of structure at %C must have a " |
1591 | "deferred shape"); | |
b3704193 | 1592 | t = FAILURE; |
2294b616 | 1593 | } |
1594 | } | |
3be2b8d5 | 1595 | else if (c->attr.allocatable) |
2294b616 | 1596 | { |
1597 | if (c->as->type != AS_DEFERRED) | |
1598 | { | |
1599 | gfc_error ("Allocatable component of structure at %C must have a " | |
1600 | "deferred shape"); | |
b3704193 | 1601 | t = FAILURE; |
4ee9c684 | 1602 | } |
1603 | } | |
1604 | else | |
1605 | { | |
1606 | if (c->as->type != AS_EXPLICIT) | |
1607 | { | |
1a9745d2 | 1608 | gfc_error ("Array component of structure at %C must have an " |
1609 | "explicit shape"); | |
b3704193 | 1610 | t = FAILURE; |
4ee9c684 | 1611 | } |
1612 | } | |
1613 | ||
b3704193 | 1614 | scalar: |
1615 | if (c->ts.type == BT_CLASS) | |
09c509ed | 1616 | gfc_build_class_symbol (&c->ts, &c->attr, &c->as, true); |
b3704193 | 1617 | |
1618 | return t; | |
4ee9c684 | 1619 | } |
1620 | ||
1621 | ||
1622 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1623 | ||
1624 | match | |
1a9745d2 | 1625 | gfc_match_null (gfc_expr **result) |
4ee9c684 | 1626 | { |
1627 | gfc_symbol *sym; | |
4ee9c684 | 1628 | match m; |
1629 | ||
1630 | m = gfc_match (" null ( )"); | |
1631 | if (m != MATCH_YES) | |
1632 | return m; | |
1633 | ||
1634 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1635 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1636 | { | |
1637 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1638 | return MATCH_ERROR; | |
1639 | } | |
1640 | ||
1641 | gfc_intrinsic_symbol (sym); | |
1642 | ||
1643 | if (sym->attr.proc != PROC_INTRINSIC | |
950683ed | 1644 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1645 | sym->name, NULL) == FAILURE | |
1646 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
4ee9c684 | 1647 | return MATCH_ERROR; |
1648 | ||
126387b5 | 1649 | *result = gfc_get_null_expr (&gfc_current_locus); |
4ee9c684 | 1650 | |
1651 | return MATCH_YES; | |
1652 | } | |
1653 | ||
1654 | ||
4ee9c684 | 1655 | /* Match a variable name with an optional initializer. When this |
1656 | subroutine is called, a variable is expected to be parsed next. | |
1657 | Depending on what is happening at the moment, updates either the | |
1658 | symbol table or the current interface. */ | |
1659 | ||
1660 | static match | |
3923b69f | 1661 | variable_decl (int elem) |
4ee9c684 | 1662 | { |
1663 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1664 | gfc_expr *initializer, *char_len; | |
1665 | gfc_array_spec *as; | |
b549d2a5 | 1666 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
4ee9c684 | 1667 | gfc_charlen *cl; |
1668 | locus var_locus; | |
1669 | match m; | |
f6bb8f4b | 1670 | gfc_try t; |
b549d2a5 | 1671 | gfc_symbol *sym; |
4ee9c684 | 1672 | |
1673 | initializer = NULL; | |
1674 | as = NULL; | |
b549d2a5 | 1675 | cp_as = NULL; |
4ee9c684 | 1676 | |
1677 | /* When we get here, we've just matched a list of attributes and | |
1678 | maybe a type and a double colon. The next thing we expect to see | |
1679 | is the name of the symbol. */ | |
1680 | m = gfc_match_name (name); | |
1681 | if (m != MATCH_YES) | |
1682 | goto cleanup; | |
1683 | ||
cbb9e6aa | 1684 | var_locus = gfc_current_locus; |
4ee9c684 | 1685 | |
1686 | /* Now we could see the optional array spec. or character length. */ | |
aff518b0 | 1687 | m = gfc_match_array_spec (&as, true, true); |
b549d2a5 | 1688 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1689 | cp_as = gfc_copy_array_spec (as); | |
1690 | else if (m == MATCH_ERROR) | |
4ee9c684 | 1691 | goto cleanup; |
3b6a4b41 | 1692 | |
4ee9c684 | 1693 | if (m == MATCH_NO) |
1694 | as = gfc_copy_array_spec (current_as); | |
e97ac7c0 | 1695 | else if (current_as) |
1696 | merge_array_spec (current_as, as, true); | |
4ee9c684 | 1697 | |
ae2864a8 | 1698 | /* At this point, we know for sure if the symbol is PARAMETER and can thus |
1699 | determine (and check) whether it can be implied-shape. If it | |
1700 | was parsed as assumed-size, change it because PARAMETERs can not | |
1701 | be assumed-size. */ | |
1702 | if (as) | |
1703 | { | |
1704 | if (as->type == AS_IMPLIED_SHAPE && current_attr.flavor != FL_PARAMETER) | |
1705 | { | |
1706 | m = MATCH_ERROR; | |
1707 | gfc_error ("Non-PARAMETER symbol '%s' at %L can't be implied-shape", | |
1708 | name, &var_locus); | |
1709 | goto cleanup; | |
1710 | } | |
1711 | ||
1712 | if (as->type == AS_ASSUMED_SIZE && as->rank == 1 | |
1713 | && current_attr.flavor == FL_PARAMETER) | |
1714 | as->type = AS_IMPLIED_SHAPE; | |
1715 | ||
1716 | if (as->type == AS_IMPLIED_SHAPE | |
1717 | && gfc_notify_std (GFC_STD_F2008, | |
1718 | "Fortran 2008: Implied-shape array at %L", | |
1719 | &var_locus) == FAILURE) | |
1720 | { | |
1721 | m = MATCH_ERROR; | |
1722 | goto cleanup; | |
1723 | } | |
1724 | } | |
1725 | ||
4ee9c684 | 1726 | char_len = NULL; |
1727 | cl = NULL; | |
1728 | ||
1729 | if (current_ts.type == BT_CHARACTER) | |
1730 | { | |
1731 | switch (match_char_length (&char_len)) | |
1732 | { | |
1733 | case MATCH_YES: | |
d270ce52 | 1734 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
4ee9c684 | 1735 | |
1736 | cl->length = char_len; | |
1737 | break; | |
1738 | ||
3923b69f | 1739 | /* Non-constant lengths need to be copied after the first |
04b61f60 | 1740 | element. Also copy assumed lengths. */ |
4ee9c684 | 1741 | case MATCH_NO: |
04b61f60 | 1742 | if (elem > 1 |
eeebe20b | 1743 | && (current_ts.u.cl->length == NULL |
1744 | || current_ts.u.cl->length->expr_type != EXPR_CONSTANT)) | |
3923b69f | 1745 | { |
d270ce52 | 1746 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
eeebe20b | 1747 | cl->length = gfc_copy_expr (current_ts.u.cl->length); |
3923b69f | 1748 | } |
1749 | else | |
eeebe20b | 1750 | cl = current_ts.u.cl; |
3923b69f | 1751 | |
4ee9c684 | 1752 | break; |
1753 | ||
1754 | case MATCH_ERROR: | |
1755 | goto cleanup; | |
1756 | } | |
1757 | } | |
1758 | ||
b549d2a5 | 1759 | /* If this symbol has already shown up in a Cray Pointer declaration, |
f6d0e37a | 1760 | then we want to set the type & bail out. */ |
b549d2a5 | 1761 | if (gfc_option.flag_cray_pointer) |
1762 | { | |
1763 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1764 | if (sym != NULL && sym->attr.cray_pointee) | |
1765 | { | |
1766 | sym->ts.type = current_ts.type; | |
1767 | sym->ts.kind = current_ts.kind; | |
eeebe20b | 1768 | sym->ts.u.cl = cl; |
1769 | sym->ts.u.derived = current_ts.u.derived; | |
c5d33754 | 1770 | sym->ts.is_c_interop = current_ts.is_c_interop; |
1771 | sym->ts.is_iso_c = current_ts.is_iso_c; | |
b549d2a5 | 1772 | m = MATCH_YES; |
1773 | ||
1774 | /* Check to see if we have an array specification. */ | |
1775 | if (cp_as != NULL) | |
1776 | { | |
1777 | if (sym->as != NULL) | |
1778 | { | |
7698a624 | 1779 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 1780 | gfc_free_array_spec (cp_as); |
1781 | m = MATCH_ERROR; | |
1782 | goto cleanup; | |
1783 | } | |
1784 | else | |
1785 | { | |
1786 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1787 | gfc_internal_error ("Couldn't set pointee array spec."); | |
e14bee04 | 1788 | |
b549d2a5 | 1789 | /* Fix the array spec. */ |
e14bee04 | 1790 | m = gfc_mod_pointee_as (sym->as); |
b549d2a5 | 1791 | if (m == MATCH_ERROR) |
1792 | goto cleanup; | |
1793 | } | |
e14bee04 | 1794 | } |
b549d2a5 | 1795 | goto cleanup; |
1796 | } | |
1797 | else | |
1798 | { | |
1799 | gfc_free_array_spec (cp_as); | |
1800 | } | |
1801 | } | |
e14bee04 | 1802 | |
1e057e9b | 1803 | /* Procedure pointer as function result. */ |
1804 | if (gfc_current_state () == COMP_FUNCTION | |
1805 | && strcmp ("ppr@", gfc_current_block ()->name) == 0 | |
1806 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0) | |
1807 | strcpy (name, "ppr@"); | |
1808 | ||
1809 | if (gfc_current_state () == COMP_FUNCTION | |
1810 | && strcmp (name, gfc_current_block ()->name) == 0 | |
1811 | && gfc_current_block ()->result | |
1812 | && strcmp ("ppr@", gfc_current_block ()->result->name) == 0) | |
1813 | strcpy (name, "ppr@"); | |
e14bee04 | 1814 | |
4ee9c684 | 1815 | /* OK, we've successfully matched the declaration. Now put the |
1816 | symbol in the current namespace, because it might be used in the | |
fe06c0d5 | 1817 | optional initialization expression for this symbol, e.g. this is |
4ee9c684 | 1818 | perfectly legal: |
1819 | ||
1820 | integer, parameter :: i = huge(i) | |
1821 | ||
1822 | This is only true for parameters or variables of a basic type. | |
1823 | For components of derived types, it is not true, so we don't | |
1824 | create a symbol for those yet. If we fail to create the symbol, | |
1825 | bail out. */ | |
1826 | if (gfc_current_state () != COMP_DERIVED | |
1827 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1828 | { | |
b8a51d79 | 1829 | m = MATCH_ERROR; |
1830 | goto cleanup; | |
1831 | } | |
1832 | ||
60fbbf9e | 1833 | /* An interface body specifies all of the procedure's |
1834 | characteristics and these shall be consistent with those | |
1835 | specified in the procedure definition, except that the interface | |
1836 | may specify a procedure that is not pure if the procedure is | |
1837 | defined to be pure(12.3.2). */ | |
71c22dfb | 1838 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
1a9745d2 | 1839 | && gfc_current_ns->proc_name |
1840 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
eeebe20b | 1841 | && current_ts.u.derived->ns != gfc_current_ns) |
c723595c | 1842 | { |
1843 | gfc_symtree *st; | |
eeebe20b | 1844 | st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.u.derived->name); |
1845 | if (!(current_ts.u.derived->attr.imported | |
c723595c | 1846 | && st != NULL |
eeebe20b | 1847 | && st->n.sym == current_ts.u.derived) |
c723595c | 1848 | && !gfc_current_ns->has_import_set) |
1849 | { | |
1850 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1851 | "interface", name); | |
1852 | m = MATCH_ERROR; | |
1853 | goto cleanup; | |
1854 | } | |
4ee9c684 | 1855 | } |
1856 | ||
1857 | /* In functions that have a RESULT variable defined, the function | |
1858 | name always refers to function calls. Therefore, the name is | |
1859 | not allowed to appear in specification statements. */ | |
1860 | if (gfc_current_state () == COMP_FUNCTION | |
1861 | && gfc_current_block () != NULL | |
1862 | && gfc_current_block ()->result != NULL | |
1863 | && gfc_current_block ()->result != gfc_current_block () | |
1864 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1865 | { | |
1866 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1867 | m = MATCH_ERROR; | |
1868 | goto cleanup; | |
1869 | } | |
1870 | ||
b4f45d02 | 1871 | /* We allow old-style initializations of the form |
1872 | integer i /2/, j(4) /3*3, 1/ | |
1873 | (if no colon has been seen). These are different from data | |
1874 | statements in that initializers are only allowed to apply to the | |
1875 | variable immediately preceding, i.e. | |
1876 | integer i, j /1, 2/ | |
1877 | is not allowed. Therefore we have to do some work manually, that | |
cca3db55 | 1878 | could otherwise be left to the matchers for DATA statements. */ |
b4f45d02 | 1879 | |
1880 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1881 | { | |
1882 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1883 | "initialization at %C") == FAILURE) | |
1884 | return MATCH_ERROR; | |
e14bee04 | 1885 | |
b4f45d02 | 1886 | return match_old_style_init (name); |
1887 | } | |
1888 | ||
4ee9c684 | 1889 | /* The double colon must be present in order to have initializers. |
1890 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1891 | if (colon_seen) | |
1892 | { | |
1893 | if (gfc_match (" =>") == MATCH_YES) | |
1894 | { | |
4ee9c684 | 1895 | if (!current_attr.pointer) |
1896 | { | |
1897 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1898 | m = MATCH_ERROR; | |
1899 | goto cleanup; | |
1900 | } | |
1901 | ||
1902 | m = gfc_match_null (&initializer); | |
1903 | if (m == MATCH_NO) | |
1904 | { | |
e4789c62 | 1905 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
4ee9c684 | 1906 | m = MATCH_ERROR; |
1907 | } | |
1908 | ||
0407b7df | 1909 | if (gfc_pure (NULL) && gfc_state_stack->state != COMP_DERIVED) |
4ee9c684 | 1910 | { |
1a9745d2 | 1911 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1912 | "a PURE procedure"); | |
4ee9c684 | 1913 | m = MATCH_ERROR; |
1914 | } | |
1915 | ||
1916 | if (m != MATCH_YES) | |
1917 | goto cleanup; | |
1918 | ||
4ee9c684 | 1919 | } |
1920 | else if (gfc_match_char ('=') == MATCH_YES) | |
1921 | { | |
1922 | if (current_attr.pointer) | |
1923 | { | |
1a9745d2 | 1924 | gfc_error ("Pointer initialization at %C requires '=>', " |
1925 | "not '='"); | |
4ee9c684 | 1926 | m = MATCH_ERROR; |
1927 | goto cleanup; | |
1928 | } | |
1929 | ||
1930 | m = gfc_match_init_expr (&initializer); | |
1931 | if (m == MATCH_NO) | |
1932 | { | |
1933 | gfc_error ("Expected an initialization expression at %C"); | |
1934 | m = MATCH_ERROR; | |
1935 | } | |
1936 | ||
b3a420c5 | 1937 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL) |
1938 | && gfc_state_stack->state != COMP_DERIVED) | |
4ee9c684 | 1939 | { |
1a9745d2 | 1940 | gfc_error ("Initialization of variable at %C is not allowed in " |
1941 | "a PURE procedure"); | |
4ee9c684 | 1942 | m = MATCH_ERROR; |
1943 | } | |
1944 | ||
1945 | if (m != MATCH_YES) | |
1946 | goto cleanup; | |
1947 | } | |
8ffad0f9 | 1948 | } |
1949 | ||
2294b616 | 1950 | if (initializer != NULL && current_attr.allocatable |
1951 | && gfc_current_state () == COMP_DERIVED) | |
1952 | { | |
1a9745d2 | 1953 | gfc_error ("Initialization of allocatable component at %C is not " |
1954 | "allowed"); | |
2294b616 | 1955 | m = MATCH_ERROR; |
1956 | goto cleanup; | |
1957 | } | |
1958 | ||
d9b3f26b | 1959 | /* Add the initializer. Note that it is fine if initializer is |
4ee9c684 | 1960 | NULL here, because we sometimes also need to check if a |
1961 | declaration *must* have an initialization expression. */ | |
1962 | if (gfc_current_state () != COMP_DERIVED) | |
1963 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1964 | else | |
d9b3f26b | 1965 | { |
2294b616 | 1966 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1967 | && !current_attr.pointer && !initializer) |
d9b3f26b | 1968 | initializer = gfc_default_initializer (¤t_ts); |
1969 | t = build_struct (name, cl, &initializer, &as); | |
1970 | } | |
4ee9c684 | 1971 | |
1972 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1973 | ||
1974 | cleanup: | |
1975 | /* Free stuff up and return. */ | |
1976 | gfc_free_expr (initializer); | |
1977 | gfc_free_array_spec (as); | |
1978 | ||
1979 | return m; | |
1980 | } | |
1981 | ||
1982 | ||
d10f89ee | 1983 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
1984 | This assumes that the byte size is equal to the kind number for | |
1985 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
4ee9c684 | 1986 | |
1987 | match | |
1a9745d2 | 1988 | gfc_match_old_kind_spec (gfc_typespec *ts) |
4ee9c684 | 1989 | { |
1990 | match m; | |
3bd3b616 | 1991 | int original_kind; |
4ee9c684 | 1992 | |
1993 | if (gfc_match_char ('*') != MATCH_YES) | |
1994 | return MATCH_NO; | |
1995 | ||
3bd3b616 | 1996 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
4ee9c684 | 1997 | if (m != MATCH_YES) |
1998 | return MATCH_ERROR; | |
1999 | ||
b118a35b | 2000 | original_kind = ts->kind; |
2001 | ||
4ee9c684 | 2002 | /* Massage the kind numbers for complex types. */ |
b118a35b | 2003 | if (ts->type == BT_COMPLEX) |
2004 | { | |
2005 | if (ts->kind % 2) | |
1a9745d2 | 2006 | { |
2007 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
2008 | gfc_basic_typename (ts->type), original_kind); | |
2009 | return MATCH_ERROR; | |
2010 | } | |
b118a35b | 2011 | ts->kind /= 2; |
2012 | } | |
4ee9c684 | 2013 | |
f2d4ef3b | 2014 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 2015 | { |
b118a35b | 2016 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
1a9745d2 | 2017 | gfc_basic_typename (ts->type), original_kind); |
4ee9c684 | 2018 | return MATCH_ERROR; |
2019 | } | |
2020 | ||
be7f01a1 | 2021 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
2022 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
2023 | return MATCH_ERROR; | |
2024 | ||
4ee9c684 | 2025 | return MATCH_YES; |
2026 | } | |
2027 | ||
2028 | ||
2029 | /* Match a kind specification. Since kinds are generally optional, we | |
2030 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
2031 | string is found, then we know we have an error. */ | |
2032 | ||
2033 | match | |
67a51c8e | 2034 | gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only) |
4ee9c684 | 2035 | { |
67a51c8e | 2036 | locus where, loc; |
4ee9c684 | 2037 | gfc_expr *e; |
2038 | match m, n; | |
c632ff3d | 2039 | char c; |
4ee9c684 | 2040 | const char *msg; |
2041 | ||
2042 | m = MATCH_NO; | |
67a51c8e | 2043 | n = MATCH_YES; |
4ee9c684 | 2044 | e = NULL; |
2045 | ||
67a51c8e | 2046 | where = loc = gfc_current_locus; |
2047 | ||
2048 | if (kind_expr_only) | |
2049 | goto kind_expr; | |
4ee9c684 | 2050 | |
2051 | if (gfc_match_char ('(') == MATCH_NO) | |
2052 | return MATCH_NO; | |
2053 | ||
2054 | /* Also gobbles optional text. */ | |
2055 | if (gfc_match (" kind = ") == MATCH_YES) | |
2056 | m = MATCH_ERROR; | |
2057 | ||
67a51c8e | 2058 | loc = gfc_current_locus; |
2059 | ||
2060 | kind_expr: | |
4ee9c684 | 2061 | n = gfc_match_init_expr (&e); |
67a51c8e | 2062 | |
4ee9c684 | 2063 | if (n != MATCH_YES) |
67a51c8e | 2064 | { |
077932f9 | 2065 | if (gfc_matching_function) |
67a51c8e | 2066 | { |
077932f9 | 2067 | /* The function kind expression might include use associated or |
2068 | imported parameters and try again after the specification | |
2069 | expressions..... */ | |
67a51c8e | 2070 | if (gfc_match_char (')') != MATCH_YES) |
2071 | { | |
2072 | gfc_error ("Missing right parenthesis at %C"); | |
2073 | m = MATCH_ERROR; | |
2074 | goto no_match; | |
2075 | } | |
2076 | ||
2077 | gfc_free_expr (e); | |
67a51c8e | 2078 | gfc_undo_symbols (); |
2079 | return MATCH_YES; | |
2080 | } | |
2081 | else | |
2082 | { | |
2083 | /* ....or else, the match is real. */ | |
2084 | if (n == MATCH_NO) | |
2085 | gfc_error ("Expected initialization expression at %C"); | |
2086 | if (n != MATCH_YES) | |
2087 | return MATCH_ERROR; | |
2088 | } | |
2089 | } | |
4ee9c684 | 2090 | |
2091 | if (e->rank != 0) | |
2092 | { | |
2093 | gfc_error ("Expected scalar initialization expression at %C"); | |
2094 | m = MATCH_ERROR; | |
2095 | goto no_match; | |
2096 | } | |
2097 | ||
2098 | msg = gfc_extract_int (e, &ts->kind); | |
077932f9 | 2099 | |
4ee9c684 | 2100 | if (msg != NULL) |
2101 | { | |
2102 | gfc_error (msg); | |
2103 | m = MATCH_ERROR; | |
2104 | goto no_match; | |
2105 | } | |
2106 | ||
c5d33754 | 2107 | /* Before throwing away the expression, let's see if we had a |
2108 | C interoperable kind (and store the fact). */ | |
2109 | if (e->ts.is_c_interop == 1) | |
2110 | { | |
2111 | /* Mark this as c interoperable if being declared with one | |
2112 | of the named constants from iso_c_binding. */ | |
2113 | ts->is_c_interop = e->ts.is_iso_c; | |
2114 | ts->f90_type = e->ts.f90_type; | |
2115 | } | |
2116 | ||
4ee9c684 | 2117 | gfc_free_expr (e); |
2118 | e = NULL; | |
2119 | ||
c5d33754 | 2120 | /* Ignore errors to this point, if we've gotten here. This means |
2121 | we ignore the m=MATCH_ERROR from above. */ | |
f2d4ef3b | 2122 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 2123 | { |
2124 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
2125 | gfc_basic_typename (ts->type)); | |
c632ff3d | 2126 | gfc_current_locus = where; |
2127 | return MATCH_ERROR; | |
4ee9c684 | 2128 | } |
c632ff3d | 2129 | |
209d3778 | 2130 | /* Warn if, e.g., c_int is used for a REAL variable, but not |
2131 | if, e.g., c_double is used for COMPLEX as the standard | |
2132 | explicitly says that the kind type parameter for complex and real | |
2133 | variable is the same, i.e. c_float == c_float_complex. */ | |
2134 | if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type | |
2135 | && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX) | |
2136 | || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL))) | |
ded233a6 | 2137 | gfc_warning_now ("C kind type parameter is for type %s but type at %L " |
2138 | "is %s", gfc_basic_typename (ts->f90_type), &where, | |
2139 | gfc_basic_typename (ts->type)); | |
209d3778 | 2140 | |
c632ff3d | 2141 | gfc_gobble_whitespace (); |
e0be6f02 | 2142 | if ((c = gfc_next_ascii_char ()) != ')' |
2143 | && (ts->type != BT_CHARACTER || c != ',')) | |
4ee9c684 | 2144 | { |
c632ff3d | 2145 | if (ts->type == BT_CHARACTER) |
2146 | gfc_error ("Missing right parenthesis or comma at %C"); | |
2147 | else | |
2148 | gfc_error ("Missing right parenthesis at %C"); | |
67a51c8e | 2149 | m = MATCH_ERROR; |
4ee9c684 | 2150 | } |
c5d33754 | 2151 | else |
2152 | /* All tests passed. */ | |
2153 | m = MATCH_YES; | |
4ee9c684 | 2154 | |
c5d33754 | 2155 | if(m == MATCH_ERROR) |
2156 | gfc_current_locus = where; | |
2157 | ||
2158 | /* Return what we know from the test(s). */ | |
2159 | return m; | |
4ee9c684 | 2160 | |
2161 | no_match: | |
2162 | gfc_free_expr (e); | |
cbb9e6aa | 2163 | gfc_current_locus = where; |
4ee9c684 | 2164 | return m; |
2165 | } | |
2166 | ||
2167 | ||
33399208 | 2168 | static match |
2169 | match_char_kind (int * kind, int * is_iso_c) | |
2170 | { | |
2171 | locus where; | |
2172 | gfc_expr *e; | |
2173 | match m, n; | |
2174 | const char *msg; | |
2175 | ||
2176 | m = MATCH_NO; | |
2177 | e = NULL; | |
2178 | where = gfc_current_locus; | |
2179 | ||
2180 | n = gfc_match_init_expr (&e); | |
c632ff3d | 2181 | |
077932f9 | 2182 | if (n != MATCH_YES && gfc_matching_function) |
c632ff3d | 2183 | { |
077932f9 | 2184 | /* The expression might include use-associated or imported |
2185 | parameters and try again after the specification | |
2186 | expressions. */ | |
c632ff3d | 2187 | gfc_free_expr (e); |
c632ff3d | 2188 | gfc_undo_symbols (); |
2189 | return MATCH_YES; | |
2190 | } | |
2191 | ||
33399208 | 2192 | if (n == MATCH_NO) |
2193 | gfc_error ("Expected initialization expression at %C"); | |
2194 | if (n != MATCH_YES) | |
2195 | return MATCH_ERROR; | |
2196 | ||
2197 | if (e->rank != 0) | |
2198 | { | |
2199 | gfc_error ("Expected scalar initialization expression at %C"); | |
2200 | m = MATCH_ERROR; | |
2201 | goto no_match; | |
2202 | } | |
2203 | ||
2204 | msg = gfc_extract_int (e, kind); | |
2205 | *is_iso_c = e->ts.is_iso_c; | |
2206 | if (msg != NULL) | |
2207 | { | |
2208 | gfc_error (msg); | |
2209 | m = MATCH_ERROR; | |
2210 | goto no_match; | |
2211 | } | |
2212 | ||
2213 | gfc_free_expr (e); | |
2214 | ||
2215 | /* Ignore errors to this point, if we've gotten here. This means | |
2216 | we ignore the m=MATCH_ERROR from above. */ | |
2217 | if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0) | |
2218 | { | |
2219 | gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind); | |
2220 | m = MATCH_ERROR; | |
2221 | } | |
2222 | else | |
2223 | /* All tests passed. */ | |
2224 | m = MATCH_YES; | |
2225 | ||
2226 | if (m == MATCH_ERROR) | |
2227 | gfc_current_locus = where; | |
2228 | ||
2229 | /* Return what we know from the test(s). */ | |
2230 | return m; | |
2231 | ||
2232 | no_match: | |
2233 | gfc_free_expr (e); | |
2234 | gfc_current_locus = where; | |
2235 | return m; | |
2236 | } | |
2237 | ||
10f5dcc0 | 2238 | |
4ee9c684 | 2239 | /* Match the various kind/length specifications in a CHARACTER |
2240 | declaration. We don't return MATCH_NO. */ | |
2241 | ||
10f5dcc0 | 2242 | match |
2243 | gfc_match_char_spec (gfc_typespec *ts) | |
4ee9c684 | 2244 | { |
33399208 | 2245 | int kind, seen_length, is_iso_c; |
4ee9c684 | 2246 | gfc_charlen *cl; |
2247 | gfc_expr *len; | |
2248 | match m; | |
33399208 | 2249 | |
4ee9c684 | 2250 | len = NULL; |
2251 | seen_length = 0; | |
33399208 | 2252 | kind = 0; |
2253 | is_iso_c = 0; | |
4ee9c684 | 2254 | |
2255 | /* Try the old-style specification first. */ | |
2256 | old_char_selector = 0; | |
2257 | ||
2258 | m = match_char_length (&len); | |
2259 | if (m != MATCH_NO) | |
2260 | { | |
2261 | if (m == MATCH_YES) | |
2262 | old_char_selector = 1; | |
2263 | seen_length = 1; | |
2264 | goto done; | |
2265 | } | |
2266 | ||
2267 | m = gfc_match_char ('('); | |
2268 | if (m != MATCH_YES) | |
2269 | { | |
c5d33754 | 2270 | m = MATCH_YES; /* Character without length is a single char. */ |
4ee9c684 | 2271 | goto done; |
2272 | } | |
2273 | ||
c5d33754 | 2274 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ |
4ee9c684 | 2275 | if (gfc_match (" kind =") == MATCH_YES) |
2276 | { | |
33399208 | 2277 | m = match_char_kind (&kind, &is_iso_c); |
c5d33754 | 2278 | |
4ee9c684 | 2279 | if (m == MATCH_ERROR) |
2280 | goto done; | |
2281 | if (m == MATCH_NO) | |
2282 | goto syntax; | |
2283 | ||
2284 | if (gfc_match (" , len =") == MATCH_NO) | |
2285 | goto rparen; | |
2286 | ||
2287 | m = char_len_param_value (&len); | |
2288 | if (m == MATCH_NO) | |
2289 | goto syntax; | |
2290 | if (m == MATCH_ERROR) | |
2291 | goto done; | |
2292 | seen_length = 1; | |
2293 | ||
2294 | goto rparen; | |
2295 | } | |
2296 | ||
f6d0e37a | 2297 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ |
4ee9c684 | 2298 | if (gfc_match (" len =") == MATCH_YES) |
2299 | { | |
2300 | m = char_len_param_value (&len); | |
2301 | if (m == MATCH_NO) | |
2302 | goto syntax; | |
2303 | if (m == MATCH_ERROR) | |
2304 | goto done; | |
2305 | seen_length = 1; | |
2306 | ||
2307 | if (gfc_match_char (')') == MATCH_YES) | |
2308 | goto done; | |
2309 | ||
2310 | if (gfc_match (" , kind =") != MATCH_YES) | |
2311 | goto syntax; | |
2312 | ||
33399208 | 2313 | if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR) |
2314 | goto done; | |
4ee9c684 | 2315 | |
2316 | goto rparen; | |
2317 | } | |
2318 | ||
f6d0e37a | 2319 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
4ee9c684 | 2320 | m = char_len_param_value (&len); |
2321 | if (m == MATCH_NO) | |
2322 | goto syntax; | |
2323 | if (m == MATCH_ERROR) | |
2324 | goto done; | |
2325 | seen_length = 1; | |
2326 | ||
2327 | m = gfc_match_char (')'); | |
2328 | if (m == MATCH_YES) | |
2329 | goto done; | |
2330 | ||
2331 | if (gfc_match_char (',') != MATCH_YES) | |
2332 | goto syntax; | |
2333 | ||
c5d33754 | 2334 | gfc_match (" kind ="); /* Gobble optional text. */ |
4ee9c684 | 2335 | |
33399208 | 2336 | m = match_char_kind (&kind, &is_iso_c); |
4ee9c684 | 2337 | if (m == MATCH_ERROR) |
2338 | goto done; | |
2339 | if (m == MATCH_NO) | |
2340 | goto syntax; | |
2341 | ||
2342 | rparen: | |
2343 | /* Require a right-paren at this point. */ | |
2344 | m = gfc_match_char (')'); | |
2345 | if (m == MATCH_YES) | |
2346 | goto done; | |
2347 | ||
2348 | syntax: | |
2349 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
2350 | m = MATCH_ERROR; | |
a3cbe8cc | 2351 | gfc_free_expr (len); |
2352 | return m; | |
4ee9c684 | 2353 | |
2354 | done: | |
8d39570e | 2355 | /* Deal with character functions after USE and IMPORT statements. */ |
2356 | if (gfc_matching_function) | |
077932f9 | 2357 | { |
8d39570e | 2358 | gfc_free_expr (len); |
077932f9 | 2359 | gfc_undo_symbols (); |
2360 | return MATCH_YES; | |
2361 | } | |
2362 | ||
4ee9c684 | 2363 | if (m != MATCH_YES) |
2364 | { | |
2365 | gfc_free_expr (len); | |
2366 | return m; | |
2367 | } | |
2368 | ||
2369 | /* Do some final massaging of the length values. */ | |
d270ce52 | 2370 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
4ee9c684 | 2371 | |
2372 | if (seen_length == 0) | |
126387b5 | 2373 | cl->length = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1); |
4ee9c684 | 2374 | else |
2fe2caa6 | 2375 | cl->length = len; |
4ee9c684 | 2376 | |
eeebe20b | 2377 | ts->u.cl = cl; |
33399208 | 2378 | ts->kind = kind == 0 ? gfc_default_character_kind : kind; |
4ee9c684 | 2379 | |
c5d33754 | 2380 | /* We have to know if it was a c interoperable kind so we can |
2381 | do accurate type checking of bind(c) procs, etc. */ | |
33399208 | 2382 | if (kind != 0) |
2383 | /* Mark this as c interoperable if being declared with one | |
2384 | of the named constants from iso_c_binding. */ | |
2385 | ts->is_c_interop = is_iso_c; | |
c5d33754 | 2386 | else if (len != NULL) |
33399208 | 2387 | /* Here, we might have parsed something such as: character(c_char) |
2388 | In this case, the parsing code above grabs the c_char when | |
2389 | looking for the length (line 1690, roughly). it's the last | |
2390 | testcase for parsing the kind params of a character variable. | |
2391 | However, it's not actually the length. this seems like it | |
2392 | could be an error. | |
2393 | To see if the user used a C interop kind, test the expr | |
2394 | of the so called length, and see if it's C interoperable. */ | |
2395 | ts->is_c_interop = len->ts.is_iso_c; | |
c5d33754 | 2396 | |
4ee9c684 | 2397 | return MATCH_YES; |
2398 | } | |
2399 | ||
2400 | ||
e8152f13 | 2401 | /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts |
2402 | structure to the matched specification. This is necessary for FUNCTION and | |
4ee9c684 | 2403 | IMPLICIT statements. |
2404 | ||
e14bee04 | 2405 | If implicit_flag is nonzero, then we don't check for the optional |
39351103 | 2406 | kind specification. Not doing so is needed for matching an IMPLICIT |
4ee9c684 | 2407 | statement correctly. */ |
2408 | ||
67a51c8e | 2409 | match |
e8152f13 | 2410 | gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag) |
4ee9c684 | 2411 | { |
2412 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2413 | gfc_symbol *sym; | |
2414 | match m; | |
e0be6f02 | 2415 | char c; |
f446fb22 | 2416 | bool seen_deferred_kind, matched_type; |
4ee9c684 | 2417 | |
077932f9 | 2418 | /* A belt and braces check that the typespec is correctly being treated |
2419 | as a deferred characteristic association. */ | |
2420 | seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION) | |
8d39570e | 2421 | && (gfc_current_block ()->result->ts.kind == -1) |
2422 | && (ts->kind == -1); | |
4ee9c684 | 2423 | gfc_clear_ts (ts); |
077932f9 | 2424 | if (seen_deferred_kind) |
2425 | ts->kind = -1; | |
4ee9c684 | 2426 | |
c5d33754 | 2427 | /* Clear the current binding label, in case one is given. */ |
2428 | curr_binding_label[0] = '\0'; | |
2429 | ||
25b29122 | 2430 | if (gfc_match (" byte") == MATCH_YES) |
2431 | { | |
2c89e2a0 | 2432 | if (gfc_notify_std (GFC_STD_GNU, "Extension: BYTE type at %C") |
25b29122 | 2433 | == FAILURE) |
2434 | return MATCH_ERROR; | |
2435 | ||
2436 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
2437 | { | |
2438 | gfc_error ("BYTE type used at %C " | |
2439 | "is not available on the target machine"); | |
2440 | return MATCH_ERROR; | |
2441 | } | |
e14bee04 | 2442 | |
25b29122 | 2443 | ts->type = BT_INTEGER; |
2444 | ts->kind = 1; | |
2445 | return MATCH_YES; | |
2446 | } | |
2447 | ||
f446fb22 | 2448 | |
2449 | m = gfc_match (" type ( %n", name); | |
2450 | matched_type = (m == MATCH_YES); | |
2451 | ||
2452 | if ((matched_type && strcmp ("integer", name) == 0) | |
2453 | || (!matched_type && gfc_match (" integer") == MATCH_YES)) | |
4ee9c684 | 2454 | { |
2455 | ts->type = BT_INTEGER; | |
b8a891cb | 2456 | ts->kind = gfc_default_integer_kind; |
4ee9c684 | 2457 | goto get_kind; |
2458 | } | |
2459 | ||
f446fb22 | 2460 | if ((matched_type && strcmp ("character", name) == 0) |
2461 | || (!matched_type && gfc_match (" character") == MATCH_YES)) | |
4ee9c684 | 2462 | { |
f446fb22 | 2463 | if (matched_type |
2464 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: TYPE with " | |
2465 | "intrinsic-type-spec at %C") == FAILURE) | |
2466 | return MATCH_ERROR; | |
2467 | ||
4ee9c684 | 2468 | ts->type = BT_CHARACTER; |
39351103 | 2469 | if (implicit_flag == 0) |
f446fb22 | 2470 | m = gfc_match_char_spec (ts); |
39351103 | 2471 | else |
f446fb22 | 2472 | m = MATCH_YES; |
2473 | ||
2474 | if (matched_type && m == MATCH_YES && gfc_match_char (')') != MATCH_YES) | |
2475 | m = MATCH_ERROR; | |
2476 | ||
2477 | return m; | |
4ee9c684 | 2478 | } |
2479 | ||
f446fb22 | 2480 | if ((matched_type && strcmp ("real", name) == 0) |
2481 | || (!matched_type && gfc_match (" real") == MATCH_YES)) | |
4ee9c684 | 2482 | { |
2483 | ts->type = BT_REAL; | |
b8a891cb | 2484 | ts->kind = gfc_default_real_kind; |
4ee9c684 | 2485 | goto get_kind; |
2486 | } | |
2487 | ||
f446fb22 | 2488 | if ((matched_type |
2489 | && (strcmp ("doubleprecision", name) == 0 | |
2490 | || (strcmp ("double", name) == 0 | |
2491 | && gfc_match (" precision") == MATCH_YES))) | |
2492 | || (!matched_type && gfc_match (" double precision") == MATCH_YES)) | |
4ee9c684 | 2493 | { |
f446fb22 | 2494 | if (matched_type |
2495 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: TYPE with " | |
2496 | "intrinsic-type-spec at %C") == FAILURE) | |
2497 | return MATCH_ERROR; | |
2498 | if (matched_type && gfc_match_char (')') != MATCH_YES) | |
2499 | return MATCH_ERROR; | |
2500 | ||
4ee9c684 | 2501 | ts->type = BT_REAL; |
b8a891cb | 2502 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2503 | return MATCH_YES; |
2504 | } | |
2505 | ||
f446fb22 | 2506 | if ((matched_type && strcmp ("complex", name) == 0) |
2507 | || (!matched_type && gfc_match (" complex") == MATCH_YES)) | |
4ee9c684 | 2508 | { |
2509 | ts->type = BT_COMPLEX; | |
b8a891cb | 2510 | ts->kind = gfc_default_complex_kind; |
4ee9c684 | 2511 | goto get_kind; |
2512 | } | |
2513 | ||
f446fb22 | 2514 | if ((matched_type |
2515 | && (strcmp ("doublecomplex", name) == 0 | |
2516 | || (strcmp ("double", name) == 0 | |
2517 | && gfc_match (" complex") == MATCH_YES))) | |
2518 | || (!matched_type && gfc_match (" double complex") == MATCH_YES)) | |
4ee9c684 | 2519 | { |
f446fb22 | 2520 | if (gfc_notify_std (GFC_STD_GNU, "Extension: DOUBLE COMPLEX at %C") |
2521 | == FAILURE) | |
2522 | return MATCH_ERROR; | |
2523 | ||
2524 | if (matched_type | |
2525 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: TYPE with " | |
2526 | "intrinsic-type-spec at %C") == FAILURE) | |
2527 | return MATCH_ERROR; | |
2528 | ||
2529 | if (matched_type && gfc_match_char (')') != MATCH_YES) | |
be7f01a1 | 2530 | return MATCH_ERROR; |
2531 | ||
4ee9c684 | 2532 | ts->type = BT_COMPLEX; |
b8a891cb | 2533 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2534 | return MATCH_YES; |
2535 | } | |
2536 | ||
f446fb22 | 2537 | if ((matched_type && strcmp ("logical", name) == 0) |
2538 | || (!matched_type && gfc_match (" logical") == MATCH_YES)) | |
4ee9c684 | 2539 | { |
2540 | ts->type = BT_LOGICAL; | |
b8a891cb | 2541 | ts->kind = gfc_default_logical_kind; |
4ee9c684 | 2542 | goto get_kind; |
2543 | } | |
2544 | ||
f446fb22 | 2545 | if (matched_type) |
2546 | m = gfc_match_char (')'); | |
2547 | ||
1de1b1a9 | 2548 | if (m == MATCH_YES) |
2549 | ts->type = BT_DERIVED; | |
2550 | else | |
8ca7f89c | 2551 | { |
2552 | m = gfc_match (" class ( %n )", name); | |
2553 | if (m != MATCH_YES) | |
2554 | return m; | |
1de1b1a9 | 2555 | ts->type = BT_CLASS; |
8ca7f89c | 2556 | |
e8152f13 | 2557 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: CLASS statement at %C") |
2558 | == FAILURE) | |
2559 | return MATCH_ERROR; | |
8ca7f89c | 2560 | } |
4ee9c684 | 2561 | |
077932f9 | 2562 | /* Defer association of the derived type until the end of the |
2563 | specification block. However, if the derived type can be | |
2564 | found, add it to the typespec. */ | |
2565 | if (gfc_matching_function) | |
67a51c8e | 2566 | { |
eeebe20b | 2567 | ts->u.derived = NULL; |
077932f9 | 2568 | if (gfc_current_state () != COMP_INTERFACE |
2569 | && !gfc_find_symbol (name, NULL, 1, &sym) && sym) | |
eeebe20b | 2570 | ts->u.derived = sym; |
67a51c8e | 2571 | return MATCH_YES; |
2572 | } | |
2573 | ||
2574 | /* Search for the name but allow the components to be defined later. If | |
2575 | type = -1, this typespec has been seen in a function declaration but | |
077932f9 | 2576 | the type could not be accessed at that point. */ |
2577 | sym = NULL; | |
67a51c8e | 2578 | if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym)) |
4ee9c684 | 2579 | { |
2580 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2581 | return MATCH_ERROR; | |
2582 | } | |
67a51c8e | 2583 | else if (ts->kind == -1) |
2584 | { | |
077932f9 | 2585 | int iface = gfc_state_stack->previous->state != COMP_INTERFACE |
2586 | || gfc_current_ns->has_import_set; | |
2587 | if (gfc_find_symbol (name, NULL, iface, &sym)) | |
67a51c8e | 2588 | { |
2589 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2590 | return MATCH_ERROR; | |
2591 | } | |
2592 | ||
077932f9 | 2593 | ts->kind = 0; |
67a51c8e | 2594 | if (sym == NULL) |
2595 | return MATCH_NO; | |
2596 | } | |
4ee9c684 | 2597 | |
2598 | if (sym->attr.flavor != FL_DERIVED | |
950683ed | 2599 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 2600 | return MATCH_ERROR; |
2601 | ||
077932f9 | 2602 | gfc_set_sym_referenced (sym); |
eeebe20b | 2603 | ts->u.derived = sym; |
4ee9c684 | 2604 | |
2605 | return MATCH_YES; | |
2606 | ||
2607 | get_kind: | |
f446fb22 | 2608 | if (matched_type |
2609 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: TYPE with " | |
2610 | "intrinsic-type-spec at %C") == FAILURE) | |
2611 | return MATCH_ERROR; | |
2612 | ||
4ee9c684 | 2613 | /* For all types except double, derived and character, look for an |
2614 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
39351103 | 2615 | if (implicit_flag == 1) |
f446fb22 | 2616 | { |
2617 | if (matched_type && gfc_match_char (')') != MATCH_YES) | |
2618 | return MATCH_ERROR; | |
2619 | ||
2620 | return MATCH_YES; | |
2621 | } | |
4ee9c684 | 2622 | |
18f3698a | 2623 | if (gfc_current_form == FORM_FREE) |
2624 | { | |
2c89e2a0 | 2625 | c = gfc_peek_ascii_char (); |
2626 | if (!gfc_is_whitespace (c) && c != '*' && c != '(' | |
1a9745d2 | 2627 | && c != ':' && c != ',') |
f446fb22 | 2628 | { |
2629 | if (matched_type && c == ')') | |
2630 | { | |
2631 | gfc_next_ascii_char (); | |
2632 | return MATCH_YES; | |
2633 | } | |
2634 | return MATCH_NO; | |
2635 | } | |
18f3698a | 2636 | } |
2637 | ||
67a51c8e | 2638 | m = gfc_match_kind_spec (ts, false); |
4ee9c684 | 2639 | if (m == MATCH_NO && ts->type != BT_CHARACTER) |
2640 | m = gfc_match_old_kind_spec (ts); | |
2641 | ||
f446fb22 | 2642 | if (matched_type && gfc_match_char (')') != MATCH_YES) |
2643 | return MATCH_ERROR; | |
2644 | ||
077932f9 | 2645 | /* Defer association of the KIND expression of function results |
2646 | until after USE and IMPORT statements. */ | |
2647 | if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ()) | |
2648 | || gfc_matching_function) | |
2649 | return MATCH_YES; | |
2650 | ||
4ee9c684 | 2651 | if (m == MATCH_NO) |
2652 | m = MATCH_YES; /* No kind specifier found. */ | |
2653 | ||
2654 | return m; | |
2655 | } | |
2656 | ||
2657 | ||
39351103 | 2658 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
2659 | already matched in parse.c, or we would not end up here in the | |
2660 | first place. So the only thing we need to check, is if there is | |
2661 | trailing garbage. If not, the match is successful. */ | |
2662 | ||
2663 | match | |
2664 | gfc_match_implicit_none (void) | |
2665 | { | |
39351103 | 2666 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
2667 | } | |
2668 | ||
2669 | ||
2670 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
2671 | ||
2672 | static match | |
b70528c7 | 2673 | match_implicit_range (void) |
39351103 | 2674 | { |
e0be6f02 | 2675 | char c, c1, c2; |
2676 | int inner; | |
39351103 | 2677 | locus cur_loc; |
2678 | ||
2679 | cur_loc = gfc_current_locus; | |
2680 | ||
2681 | gfc_gobble_whitespace (); | |
e0be6f02 | 2682 | c = gfc_next_ascii_char (); |
39351103 | 2683 | if (c != '(') |
2684 | { | |
2685 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
2686 | goto bad; | |
2687 | } | |
2688 | ||
2689 | inner = 1; | |
2690 | while (inner) | |
2691 | { | |
2692 | gfc_gobble_whitespace (); | |
e0be6f02 | 2693 | c1 = gfc_next_ascii_char (); |
39351103 | 2694 | if (!ISALPHA (c1)) |
2695 | goto bad; | |
2696 | ||
2697 | gfc_gobble_whitespace (); | |
e0be6f02 | 2698 | c = gfc_next_ascii_char (); |
39351103 | 2699 | |
2700 | switch (c) | |
2701 | { | |
2702 | case ')': | |
f6d0e37a | 2703 | inner = 0; /* Fall through. */ |
39351103 | 2704 | |
2705 | case ',': | |
2706 | c2 = c1; | |
2707 | break; | |
2708 | ||
2709 | case '-': | |
2710 | gfc_gobble_whitespace (); | |
e0be6f02 | 2711 | c2 = gfc_next_ascii_char (); |
39351103 | 2712 | if (!ISALPHA (c2)) |
2713 | goto bad; | |
2714 | ||
2715 | gfc_gobble_whitespace (); | |
e0be6f02 | 2716 | c = gfc_next_ascii_char (); |
39351103 | 2717 | |
2718 | if ((c != ',') && (c != ')')) | |
2719 | goto bad; | |
2720 | if (c == ')') | |
2721 | inner = 0; | |
2722 | ||
2723 | break; | |
2724 | ||
2725 | default: | |
2726 | goto bad; | |
2727 | } | |
2728 | ||
2729 | if (c1 > c2) | |
2730 | { | |
2731 | gfc_error ("Letters must be in alphabetic order in " | |
2732 | "IMPLICIT statement at %C"); | |
2733 | goto bad; | |
2734 | } | |
2735 | ||
2736 | /* See if we can add the newly matched range to the pending | |
1a9745d2 | 2737 | implicits from this IMPLICIT statement. We do not check for |
2738 | conflicts with whatever earlier IMPLICIT statements may have | |
2739 | set. This is done when we've successfully finished matching | |
2740 | the current one. */ | |
b70528c7 | 2741 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
39351103 | 2742 | goto bad; |
2743 | } | |
2744 | ||
2745 | return MATCH_YES; | |
2746 | ||
2747 | bad: | |
2748 | gfc_syntax_error (ST_IMPLICIT); | |
2749 | ||
2750 | gfc_current_locus = cur_loc; | |
2751 | return MATCH_ERROR; | |
2752 | } | |
2753 | ||
2754 | ||
2755 | /* Match an IMPLICIT statement, storing the types for | |
2756 | gfc_set_implicit() if the statement is accepted by the parser. | |
2757 | There is a strange looking, but legal syntactic construction | |
2758 | possible. It looks like: | |
2759 | ||
2760 | IMPLICIT INTEGER (a-b) (c-d) | |
2761 | ||
2762 | This is legal if "a-b" is a constant expression that happens to | |
2763 | equal one of the legal kinds for integers. The real problem | |
2764 | happens with an implicit specification that looks like: | |
2765 | ||
2766 | IMPLICIT INTEGER (a-b) | |
2767 | ||
2768 | In this case, a typespec matcher that is "greedy" (as most of the | |
2769 | matchers are) gobbles the character range as a kindspec, leaving | |
2770 | nothing left. We therefore have to go a bit more slowly in the | |
2771 | matching process by inhibiting the kindspec checking during | |
2772 | typespec matching and checking for a kind later. */ | |
2773 | ||
2774 | match | |
2775 | gfc_match_implicit (void) | |
2776 | { | |
2777 | gfc_typespec ts; | |
2778 | locus cur_loc; | |
e0be6f02 | 2779 | char c; |
39351103 | 2780 | match m; |
2781 | ||
52179f31 | 2782 | gfc_clear_ts (&ts); |
2783 | ||
39351103 | 2784 | /* We don't allow empty implicit statements. */ |
2785 | if (gfc_match_eos () == MATCH_YES) | |
2786 | { | |
2787 | gfc_error ("Empty IMPLICIT statement at %C"); | |
2788 | return MATCH_ERROR; | |
2789 | } | |
2790 | ||
39351103 | 2791 | do |
2792 | { | |
b70528c7 | 2793 | /* First cleanup. */ |
2794 | gfc_clear_new_implicit (); | |
2795 | ||
39351103 | 2796 | /* A basic type is mandatory here. */ |
e8152f13 | 2797 | m = gfc_match_decl_type_spec (&ts, 1); |
39351103 | 2798 | if (m == MATCH_ERROR) |
2799 | goto error; | |
2800 | if (m == MATCH_NO) | |
2801 | goto syntax; | |
2802 | ||
2803 | cur_loc = gfc_current_locus; | |
b70528c7 | 2804 | m = match_implicit_range (); |
39351103 | 2805 | |
2806 | if (m == MATCH_YES) | |
2807 | { | |
b70528c7 | 2808 | /* We may have <TYPE> (<RANGE>). */ |
39351103 | 2809 | gfc_gobble_whitespace (); |
e0be6f02 | 2810 | c = gfc_next_ascii_char (); |
39351103 | 2811 | if ((c == '\n') || (c == ',')) |
b70528c7 | 2812 | { |
2813 | /* Check for CHARACTER with no length parameter. */ | |
eeebe20b | 2814 | if (ts.type == BT_CHARACTER && !ts.u.cl) |
b70528c7 | 2815 | { |
b8a891cb | 2816 | ts.kind = gfc_default_character_kind; |
d270ce52 | 2817 | ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
126387b5 | 2818 | ts.u.cl->length = gfc_get_int_expr (gfc_default_integer_kind, |
2819 | NULL, 1); | |
b70528c7 | 2820 | } |
2821 | ||
2822 | /* Record the Successful match. */ | |
2823 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2824 | return MATCH_ERROR; | |
2825 | continue; | |
2826 | } | |
39351103 | 2827 | |
2828 | gfc_current_locus = cur_loc; | |
2829 | } | |
2830 | ||
b70528c7 | 2831 | /* Discard the (incorrectly) matched range. */ |
2832 | gfc_clear_new_implicit (); | |
2833 | ||
2834 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
2835 | if (ts.type == BT_CHARACTER) | |
10f5dcc0 | 2836 | m = gfc_match_char_spec (&ts); |
b70528c7 | 2837 | else |
39351103 | 2838 | { |
67a51c8e | 2839 | m = gfc_match_kind_spec (&ts, false); |
39351103 | 2840 | if (m == MATCH_NO) |
b70528c7 | 2841 | { |
2842 | m = gfc_match_old_kind_spec (&ts); | |
2843 | if (m == MATCH_ERROR) | |
2844 | goto error; | |
2845 | if (m == MATCH_NO) | |
2846 | goto syntax; | |
2847 | } | |
39351103 | 2848 | } |
b70528c7 | 2849 | if (m == MATCH_ERROR) |
2850 | goto error; | |
39351103 | 2851 | |
b70528c7 | 2852 | m = match_implicit_range (); |
39351103 | 2853 | if (m == MATCH_ERROR) |
2854 | goto error; | |
2855 | if (m == MATCH_NO) | |
2856 | goto syntax; | |
2857 | ||
2858 | gfc_gobble_whitespace (); | |
e0be6f02 | 2859 | c = gfc_next_ascii_char (); |
39351103 | 2860 | if ((c != '\n') && (c != ',')) |
2861 | goto syntax; | |
2862 | ||
b70528c7 | 2863 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2864 | return MATCH_ERROR; | |
39351103 | 2865 | } |
2866 | while (c == ','); | |
2867 | ||
b70528c7 | 2868 | return MATCH_YES; |
39351103 | 2869 | |
2870 | syntax: | |
2871 | gfc_syntax_error (ST_IMPLICIT); | |
2872 | ||
2873 | error: | |
2874 | return MATCH_ERROR; | |
2875 | } | |
2876 | ||
f6d0e37a | 2877 | |
d67fc9ae | 2878 | match |
2879 | gfc_match_import (void) | |
2880 | { | |
2881 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2882 | match m; | |
2883 | gfc_symbol *sym; | |
2884 | gfc_symtree *st; | |
2885 | ||
f6d0e37a | 2886 | if (gfc_current_ns->proc_name == NULL |
2887 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
d67fc9ae | 2888 | { |
2889 | gfc_error ("IMPORT statement at %C only permitted in " | |
2890 | "an INTERFACE body"); | |
2891 | return MATCH_ERROR; | |
2892 | } | |
2893 | ||
1a9745d2 | 2894 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
d67fc9ae | 2895 | == FAILURE) |
2896 | return MATCH_ERROR; | |
2897 | ||
2898 | if (gfc_match_eos () == MATCH_YES) | |
2899 | { | |
2900 | /* All host variables should be imported. */ | |
2901 | gfc_current_ns->has_import_set = 1; | |
2902 | return MATCH_YES; | |
2903 | } | |
2904 | ||
2905 | if (gfc_match (" ::") == MATCH_YES) | |
2906 | { | |
2907 | if (gfc_match_eos () == MATCH_YES) | |
1a9745d2 | 2908 | { |
2909 | gfc_error ("Expecting list of named entities at %C"); | |
2910 | return MATCH_ERROR; | |
2911 | } | |
d67fc9ae | 2912 | } |
2913 | ||
2914 | for(;;) | |
2915 | { | |
2916 | m = gfc_match (" %n", name); | |
2917 | switch (m) | |
2918 | { | |
2919 | case MATCH_YES: | |
096d4ad9 | 2920 | if (gfc_current_ns->parent != NULL |
f6d0e37a | 2921 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
096d4ad9 | 2922 | { |
2923 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2924 | return MATCH_ERROR; | |
2925 | } | |
2926 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
f6d0e37a | 2927 | && gfc_find_symbol (name, |
2928 | gfc_current_ns->proc_name->ns->parent, | |
2929 | 1, &sym)) | |
1a9745d2 | 2930 | { |
2931 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2932 | return MATCH_ERROR; | |
2933 | } | |
2934 | ||
2935 | if (sym == NULL) | |
2936 | { | |
2937 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2938 | "at %C - does not exist.", name); | |
2939 | return MATCH_ERROR; | |
2940 | } | |
2941 | ||
e14bee04 | 2942 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) |
1a9745d2 | 2943 | { |
2944 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2945 | "at %C.", name); | |
2946 | goto next_item; | |
2947 | } | |
2948 | ||
a15d1caf | 2949 | st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name); |
1a9745d2 | 2950 | st->n.sym = sym; |
2951 | sym->refs++; | |
c723595c | 2952 | sym->attr.imported = 1; |
d67fc9ae | 2953 | |
2954 | goto next_item; | |
2955 | ||
2956 | case MATCH_NO: | |
2957 | break; | |
2958 | ||
2959 | case MATCH_ERROR: | |
2960 | return MATCH_ERROR; | |
2961 | } | |
2962 | ||
2963 | next_item: | |
2964 | if (gfc_match_eos () == MATCH_YES) | |
2965 | break; | |
2966 | if (gfc_match_char (',') != MATCH_YES) | |
2967 | goto syntax; | |
2968 | } | |
2969 | ||
2970 | return MATCH_YES; | |
2971 | ||
2972 | syntax: | |
2973 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2974 | return MATCH_ERROR; | |
2975 | } | |
39351103 | 2976 | |
f6d0e37a | 2977 | |
c72e5f7e | 2978 | /* A minimal implementation of gfc_match without whitespace, escape |
2979 | characters or variable arguments. Returns true if the next | |
2980 | characters match the TARGET template exactly. */ | |
2981 | ||
2982 | static bool | |
2983 | match_string_p (const char *target) | |
2984 | { | |
2985 | const char *p; | |
2986 | ||
2987 | for (p = target; *p; p++) | |
e0be6f02 | 2988 | if ((char) gfc_next_ascii_char () != *p) |
c72e5f7e | 2989 | return false; |
2990 | return true; | |
2991 | } | |
2992 | ||
4ee9c684 | 2993 | /* Matches an attribute specification including array specs. If |
2994 | successful, leaves the variables current_attr and current_as | |
2995 | holding the specification. Also sets the colon_seen variable for | |
2996 | later use by matchers associated with initializations. | |
2997 | ||
2998 | This subroutine is a little tricky in the sense that we don't know | |
2999 | if we really have an attr-spec until we hit the double colon. | |
3000 | Until that time, we can only return MATCH_NO. This forces us to | |
3001 | check for duplicate specification at this level. */ | |
3002 | ||
3003 | static match | |
3004 | match_attr_spec (void) | |
3005 | { | |
4ee9c684 | 3006 | /* Modifiers that can exist in a type statement. */ |
3007 | typedef enum | |
3008 | { GFC_DECL_BEGIN = 0, | |
3009 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
3010 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
3ea52af3 | 3011 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
3012 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
b3c3927c | 3013 | DECL_IS_BIND_C, DECL_CODIMENSION, DECL_ASYNCHRONOUS, DECL_CONTIGUOUS, |
3014 | DECL_NONE, GFC_DECL_END /* Sentinel */ | |
4ee9c684 | 3015 | } |
3016 | decl_types; | |
3017 | ||
3018 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
3019 | #define NUM_DECL GFC_DECL_END | |
3020 | ||
4ee9c684 | 3021 | locus start, seen_at[NUM_DECL]; |
3022 | int seen[NUM_DECL]; | |
9f1b7d17 | 3023 | unsigned int d; |
4ee9c684 | 3024 | const char *attr; |
3025 | match m; | |
f6bb8f4b | 3026 | gfc_try t; |
4ee9c684 | 3027 | |
3028 | gfc_clear_attr (¤t_attr); | |
cbb9e6aa | 3029 | start = gfc_current_locus; |
4ee9c684 | 3030 | |
3031 | current_as = NULL; | |
3032 | colon_seen = 0; | |
3033 | ||
3034 | /* See if we get all of the keywords up to the final double colon. */ | |
3035 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3036 | seen[d] = 0; | |
3037 | ||
3038 | for (;;) | |
3039 | { | |
e0be6f02 | 3040 | char ch; |
c5d33754 | 3041 | |
c72e5f7e | 3042 | d = DECL_NONE; |
3043 | gfc_gobble_whitespace (); | |
3044 | ||
e0be6f02 | 3045 | ch = gfc_next_ascii_char (); |
c72e5f7e | 3046 | if (ch == ':') |
3047 | { | |
3048 | /* This is the successful exit condition for the loop. */ | |
e0be6f02 | 3049 | if (gfc_next_ascii_char () == ':') |
c72e5f7e | 3050 | break; |
3051 | } | |
3052 | else if (ch == ',') | |
c5d33754 | 3053 | { |
c5d33754 | 3054 | gfc_gobble_whitespace (); |
e0be6f02 | 3055 | switch (gfc_peek_ascii_char ()) |
c5d33754 | 3056 | { |
c72e5f7e | 3057 | case 'a': |
738928be | 3058 | gfc_next_ascii_char (); |
3059 | switch (gfc_next_ascii_char ()) | |
3060 | { | |
3061 | case 'l': | |
3062 | if (match_string_p ("locatable")) | |
3063 | { | |
3064 | /* Matched "allocatable". */ | |
3065 | d = DECL_ALLOCATABLE; | |
3066 | } | |
3067 | break; | |
3068 | ||
3069 | case 's': | |
3070 | if (match_string_p ("ynchronous")) | |
3071 | { | |
3072 | /* Matched "asynchronous". */ | |
3073 | d = DECL_ASYNCHRONOUS; | |
3074 | } | |
3075 | break; | |
3076 | } | |
b3c3927c | 3077 | break; |
c72e5f7e | 3078 | |
3079 | case 'b': | |
c5d33754 | 3080 | /* Try and match the bind(c). */ |
75ae7f6c | 3081 | m = gfc_match_bind_c (NULL, true); |
5cf92482 | 3082 | if (m == MATCH_YES) |
c5d33754 | 3083 | d = DECL_IS_BIND_C; |
5cf92482 | 3084 | else if (m == MATCH_ERROR) |
3085 | goto cleanup; | |
c72e5f7e | 3086 | break; |
3087 | ||
aff518b0 | 3088 | case 'c': |
b3c3927c | 3089 | gfc_next_ascii_char (); |
3090 | if ('o' != gfc_next_ascii_char ()) | |
3091 | break; | |
3092 | switch (gfc_next_ascii_char ()) | |
3093 | { | |
3094 | case 'd': | |
3095 | if (match_string_p ("imension")) | |
3096 | { | |
3097 | d = DECL_CODIMENSION; | |
3098 | break; | |
3099 | } | |
3100 | case 'n': | |
3101 | if (match_string_p ("tiguous")) | |
3102 | { | |
3103 | d = DECL_CONTIGUOUS; | |
3104 | break; | |
3105 | } | |
3106 | } | |
aff518b0 | 3107 | break; |
3108 | ||
c72e5f7e | 3109 | case 'd': |
3110 | if (match_string_p ("dimension")) | |
3111 | d = DECL_DIMENSION; | |
3112 | break; | |
3113 | ||
3114 | case 'e': | |
3115 | if (match_string_p ("external")) | |
3116 | d = DECL_EXTERNAL; | |
3117 | break; | |
3118 | ||
3119 | case 'i': | |
3120 | if (match_string_p ("int")) | |
3121 | { | |
e0be6f02 | 3122 | ch = gfc_next_ascii_char (); |
c72e5f7e | 3123 | if (ch == 'e') |
3124 | { | |
3125 | if (match_string_p ("nt")) | |
3126 | { | |
3127 | /* Matched "intent". */ | |
3128 | /* TODO: Call match_intent_spec from here. */ | |
3129 | if (gfc_match (" ( in out )") == MATCH_YES) | |
3130 | d = DECL_INOUT; | |
3131 | else if (gfc_match (" ( in )") == MATCH_YES) | |
3132 | d = DECL_IN; | |
3133 | else if (gfc_match (" ( out )") == MATCH_YES) | |
3134 | d = DECL_OUT; | |
3135 | } | |
3136 | } | |
3137 | else if (ch == 'r') | |
3138 | { | |
3139 | if (match_string_p ("insic")) | |
3140 | { | |
3141 | /* Matched "intrinsic". */ | |
3142 | d = DECL_INTRINSIC; | |
3143 | } | |
3144 | } | |
3145 | } | |
3146 | break; | |
3147 | ||
3148 | case 'o': | |
3149 | if (match_string_p ("optional")) | |
3150 | d = DECL_OPTIONAL; | |
3151 | break; | |
3152 | ||
3153 | case 'p': | |
e0be6f02 | 3154 | gfc_next_ascii_char (); |
3155 | switch (gfc_next_ascii_char ()) | |
c72e5f7e | 3156 | { |
3157 | case 'a': | |
3158 | if (match_string_p ("rameter")) | |
3159 | { | |
3160 | /* Matched "parameter". */ | |
3161 | d = DECL_PARAMETER; | |
3162 | } | |
3163 | break; | |
3164 | ||
3165 | case 'o': | |
3166 | if (match_string_p ("inter")) | |
3167 | { | |
3168 | /* Matched "pointer". */ | |
3169 | d = DECL_POINTER; | |
3170 | } | |
3171 | break; | |
3172 | ||
3173 | case 'r': | |
e0be6f02 | 3174 | ch = gfc_next_ascii_char (); |
c72e5f7e | 3175 | if (ch == 'i') |
3176 | { | |
3177 | if (match_string_p ("vate")) | |
3178 | { | |
3179 | /* Matched "private". */ | |
3180 | d = DECL_PRIVATE; | |
3181 | } | |
3182 | } | |
3183 | else if (ch == 'o') | |
3184 | { | |
3185 | if (match_string_p ("tected")) | |
3186 | { | |
3187 | /* Matched "protected". */ | |
3188 | d = DECL_PROTECTED; | |
3189 | } | |
3190 | } | |
3191 | break; | |
3192 | ||
3193 | case 'u': | |
3194 | if (match_string_p ("blic")) | |
3195 | { | |
3196 | /* Matched "public". */ | |
3197 | d = DECL_PUBLIC; | |
3198 | } | |
3199 | break; | |
3200 | } | |
3201 | break; | |
3202 | ||
3203 | case 's': | |
3204 | if (match_string_p ("save")) | |
3205 | d = DECL_SAVE; | |
3206 | break; | |
3207 | ||
3208 | case 't': | |
3209 | if (match_string_p ("target")) | |
3210 | d = DECL_TARGET; | |
3211 | break; | |
3212 | ||
3213 | case 'v': | |
e0be6f02 | 3214 | gfc_next_ascii_char (); |
3215 | ch = gfc_next_ascii_char (); | |
c72e5f7e | 3216 | if (ch == 'a') |
3217 | { | |
3218 | if (match_string_p ("lue")) | |
3219 | { | |
3220 | /* Matched "value". */ | |
3221 | d = DECL_VALUE; | |
3222 | } | |
3223 | } | |
3224 | else if (ch == 'o') | |
3225 | { | |
3226 | if (match_string_p ("latile")) | |
3227 | { | |
3228 | /* Matched "volatile". */ | |
3229 | d = DECL_VOLATILE; | |
3230 | } | |
3231 | } | |
3232 | break; | |
c5d33754 | 3233 | } |
3234 | } | |
f3f9b222 | 3235 | |
c72e5f7e | 3236 | /* No double colon and no recognizable decl_type, so assume that |
3237 | we've been looking at something else the whole time. */ | |
3238 | if (d == DECL_NONE) | |
3239 | { | |
3240 | m = MATCH_NO; | |
3241 | goto cleanup; | |
3242 | } | |
e14bee04 | 3243 | |
7e221851 | 3244 | /* Check to make sure any parens are paired up correctly. */ |
3245 | if (gfc_match_parens () == MATCH_ERROR) | |
3246 | { | |
3247 | m = MATCH_ERROR; | |
3248 | goto cleanup; | |
3249 | } | |
3250 | ||
4ee9c684 | 3251 | seen[d]++; |
cbb9e6aa | 3252 | seen_at[d] = gfc_current_locus; |
4ee9c684 | 3253 | |
e97ac7c0 | 3254 | if (d == DECL_DIMENSION || d == DECL_CODIMENSION) |
4ee9c684 | 3255 | { |
e97ac7c0 | 3256 | gfc_array_spec *as = NULL; |
4ee9c684 | 3257 | |
e97ac7c0 | 3258 | m = gfc_match_array_spec (&as, d == DECL_DIMENSION, |
3259 | d == DECL_CODIMENSION); | |
3260 | ||
3261 | if (current_as == NULL) | |
3262 | current_as = as; | |
3263 | else if (m == MATCH_YES) | |
4ee9c684 | 3264 | { |
e97ac7c0 | 3265 | merge_array_spec (as, current_as, false); |
3266 | gfc_free (as); | |
4ee9c684 | 3267 | } |
3268 | ||
aff518b0 | 3269 | if (m == MATCH_NO) |
3270 | { | |
e97ac7c0 | 3271 | if (d == DECL_CODIMENSION) |
3272 | gfc_error ("Missing codimension specification at %C"); | |
3273 | else | |
3274 | gfc_error ("Missing dimension specification at %C"); | |
aff518b0 | 3275 | m = MATCH_ERROR; |
3276 | } | |
3277 | ||
3278 | if (m == MATCH_ERROR) | |
3279 | goto cleanup; | |
3280 | } | |
4ee9c684 | 3281 | } |
3282 | ||
4ee9c684 | 3283 | /* Since we've seen a double colon, we have to be looking at an |
3284 | attr-spec. This means that we can now issue errors. */ | |
3285 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3286 | if (seen[d] > 1) | |
3287 | { | |
3288 | switch (d) | |
3289 | { | |
3290 | case DECL_ALLOCATABLE: | |
3291 | attr = "ALLOCATABLE"; | |
3292 | break; | |
738928be | 3293 | case DECL_ASYNCHRONOUS: |
3294 | attr = "ASYNCHRONOUS"; | |
3295 | break; | |
aff518b0 | 3296 | case DECL_CODIMENSION: |
3297 | attr = "CODIMENSION"; | |
3298 | break; | |
b3c3927c | 3299 | case DECL_CONTIGUOUS: |
3300 | attr = "CONTIGUOUS"; | |
3301 | break; | |
4ee9c684 | 3302 | case DECL_DIMENSION: |
3303 | attr = "DIMENSION"; | |
3304 | break; | |
3305 | case DECL_EXTERNAL: | |
3306 | attr = "EXTERNAL"; | |
3307 | break; | |
3308 | case DECL_IN: | |
3309 | attr = "INTENT (IN)"; | |
3310 | break; | |
3311 | case DECL_OUT: | |
3312 | attr = "INTENT (OUT)"; | |
3313 | break; | |
3314 | case DECL_INOUT: | |
3315 | attr = "INTENT (IN OUT)"; | |
3316 | break; | |
3317 | case DECL_INTRINSIC: | |
3318 | attr = "INTRINSIC"; | |
3319 | break; | |
3320 | case DECL_OPTIONAL: | |
3321 | attr = "OPTIONAL"; | |
3322 | break; | |
3323 | case DECL_PARAMETER: | |
3324 | attr = "PARAMETER"; | |
3325 | break; | |
3326 | case DECL_POINTER: | |
3327 | attr = "POINTER"; | |
3328 | break; | |
3ea52af3 | 3329 | case DECL_PROTECTED: |
3330 | attr = "PROTECTED"; | |
3331 | break; | |
4ee9c684 | 3332 | case DECL_PRIVATE: |
3333 | attr = "PRIVATE"; | |
3334 | break; | |
3335 | case DECL_PUBLIC: | |
3336 | attr = "PUBLIC"; | |
3337 | break; | |
3338 | case DECL_SAVE: | |
3339 | attr = "SAVE"; | |
3340 | break; | |
3341 | case DECL_TARGET: | |
3342 | attr = "TARGET"; | |
3343 | break; | |
c5d33754 | 3344 | case DECL_IS_BIND_C: |
3345 | attr = "IS_BIND_C"; | |
3346 | break; | |
3347 | case DECL_VALUE: | |
3348 | attr = "VALUE"; | |
3349 | break; | |
ef814c81 | 3350 | case DECL_VOLATILE: |
3351 | attr = "VOLATILE"; | |
3352 | break; | |
4ee9c684 | 3353 | default: |
f6d0e37a | 3354 | attr = NULL; /* This shouldn't happen. */ |
4ee9c684 | 3355 | } |
3356 | ||
3357 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
3358 | m = MATCH_ERROR; | |
3359 | goto cleanup; | |
3360 | } | |
3361 | ||
3362 | /* Now that we've dealt with duplicate attributes, add the attributes | |
3363 | to the current attribute. */ | |
3364 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3365 | { | |
3366 | if (seen[d] == 0) | |
3367 | continue; | |
3368 | ||
3369 | if (gfc_current_state () == COMP_DERIVED | |
aff518b0 | 3370 | && d != DECL_DIMENSION && d != DECL_CODIMENSION |
3371 | && d != DECL_POINTER && d != DECL_PRIVATE | |
b3c3927c | 3372 | && d != DECL_PUBLIC && d != DECL_CONTIGUOUS && d != DECL_NONE) |
4ee9c684 | 3373 | { |
2294b616 | 3374 | if (d == DECL_ALLOCATABLE) |
3375 | { | |
1a9745d2 | 3376 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
3377 | "attribute at %C in a TYPE definition") | |
e14bee04 | 3378 | == FAILURE) |
2294b616 | 3379 | { |
3380 | m = MATCH_ERROR; | |
3381 | goto cleanup; | |
3382 | } | |
1a9745d2 | 3383 | } |
3384 | else | |
2294b616 | 3385 | { |
3386 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
e14bee04 | 3387 | &seen_at[d]); |
2294b616 | 3388 | m = MATCH_ERROR; |
3389 | goto cleanup; | |
3390 | } | |
4ee9c684 | 3391 | } |
3392 | ||
ea13b9b7 | 3393 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
1a9745d2 | 3394 | && gfc_current_state () != COMP_MODULE) |
ea13b9b7 | 3395 | { |
3396 | if (d == DECL_PRIVATE) | |
3397 | attr = "PRIVATE"; | |
3398 | else | |
3399 | attr = "PUBLIC"; | |
e14bee04 | 3400 | if (gfc_current_state () == COMP_DERIVED |
3401 | && gfc_state_stack->previous | |
3402 | && gfc_state_stack->previous->state == COMP_MODULE) | |
3403 | { | |
3404 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s " | |
3405 | "at %L in a TYPE definition", attr, | |
3406 | &seen_at[d]) | |
3407 | == FAILURE) | |
3408 | { | |
3409 | m = MATCH_ERROR; | |
3410 | goto cleanup; | |
3411 | } | |
3412 | } | |
3413 | else | |
3414 | { | |
3415 | gfc_error ("%s attribute at %L is not allowed outside of the " | |
3416 | "specification part of a module", attr, &seen_at[d]); | |
3417 | m = MATCH_ERROR; | |
3418 | goto cleanup; | |
3419 | } | |
ea13b9b7 | 3420 | } |
3421 | ||
4ee9c684 | 3422 | switch (d) |
3423 | { | |
3424 | case DECL_ALLOCATABLE: | |
3425 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
3426 | break; | |
3427 | ||
738928be | 3428 | case DECL_ASYNCHRONOUS: |
3429 | if (gfc_notify_std (GFC_STD_F2003, | |
3430 | "Fortran 2003: ASYNCHRONOUS attribute at %C") | |
3431 | == FAILURE) | |
3432 | t = FAILURE; | |
3433 | else | |
3434 | t = gfc_add_asynchronous (¤t_attr, NULL, &seen_at[d]); | |
3435 | break; | |
3436 | ||
aff518b0 | 3437 | case DECL_CODIMENSION: |
3438 | t = gfc_add_codimension (¤t_attr, NULL, &seen_at[d]); | |
3439 | break; | |
3440 | ||
b3c3927c | 3441 | case DECL_CONTIGUOUS: |
3442 | if (gfc_notify_std (GFC_STD_F2008, | |
3443 | "Fortran 2008: CONTIGUOUS attribute at %C") | |
3444 | == FAILURE) | |
3445 | t = FAILURE; | |
3446 | else | |
3447 | t = gfc_add_contiguous (¤t_attr, NULL, &seen_at[d]); | |
3448 | break; | |
3449 | ||
4ee9c684 | 3450 | case DECL_DIMENSION: |
950683ed | 3451 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 3452 | break; |
3453 | ||
3454 | case DECL_EXTERNAL: | |
3455 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
3456 | break; | |
3457 | ||
3458 | case DECL_IN: | |
3459 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
3460 | break; | |
3461 | ||
3462 | case DECL_OUT: | |
3463 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
3464 | break; | |
3465 | ||
3466 | case DECL_INOUT: | |
3467 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
3468 | break; | |
3469 | ||
3470 | case DECL_INTRINSIC: | |
3471 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
3472 | break; | |
3473 | ||
3474 | case DECL_OPTIONAL: | |
3475 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
3476 | break; | |
3477 | ||
3478 | case DECL_PARAMETER: | |
950683ed | 3479 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
4ee9c684 | 3480 | break; |
3481 | ||
3482 | case DECL_POINTER: | |
3483 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
3484 | break; | |
3485 | ||
3ea52af3 | 3486 | case DECL_PROTECTED: |
3487 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
3488 | { | |
3489 | gfc_error ("PROTECTED at %C only allowed in specification " | |
3490 | "part of a module"); | |
3491 | t = FAILURE; | |
3492 | break; | |
3493 | } | |
3494 | ||
1a9745d2 | 3495 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
3496 | "attribute at %C") | |
3ea52af3 | 3497 | == FAILURE) |
3498 | t = FAILURE; | |
3499 | else | |
3500 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
3501 | break; | |
3502 | ||
4ee9c684 | 3503 | case DECL_PRIVATE: |
950683ed | 3504 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
3505 | &seen_at[d]); | |
4ee9c684 | 3506 | break; |
3507 | ||
3508 | case DECL_PUBLIC: | |
950683ed | 3509 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
3510 | &seen_at[d]); | |
4ee9c684 | 3511 | break; |
3512 | ||
3513 | case DECL_SAVE: | |
950683ed | 3514 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 3515 | break; |
3516 | ||
3517 | case DECL_TARGET: | |
3518 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
3519 | break; | |
3520 | ||
c5d33754 | 3521 | case DECL_IS_BIND_C: |
3522 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); | |
3523 | break; | |
3524 | ||
8f6339b6 | 3525 | case DECL_VALUE: |
1a9745d2 | 3526 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
3527 | "at %C") | |
8f6339b6 | 3528 | == FAILURE) |
3529 | t = FAILURE; | |
3530 | else | |
3531 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
3532 | break; | |
3533 | ||
ef814c81 | 3534 | case DECL_VOLATILE: |
3535 | if (gfc_notify_std (GFC_STD_F2003, | |
1a9745d2 | 3536 | "Fortran 2003: VOLATILE attribute at %C") |
ef814c81 | 3537 | == FAILURE) |
3538 | t = FAILURE; | |
3539 | else | |
3540 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
3541 | break; | |
3542 | ||
4ee9c684 | 3543 | default: |
3544 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
3545 | } | |
3546 | ||
3547 | if (t == FAILURE) | |
3548 | { | |
3549 | m = MATCH_ERROR; | |
3550 | goto cleanup; | |
3551 | } | |
3552 | } | |
3553 | ||
3554 | colon_seen = 1; | |
3555 | return MATCH_YES; | |
3556 | ||
3557 | cleanup: | |
cbb9e6aa | 3558 | gfc_current_locus = start; |
4ee9c684 | 3559 | gfc_free_array_spec (current_as); |
3560 | current_as = NULL; | |
3561 | return m; | |
3562 | } | |
3563 | ||
3564 | ||
c5d33754 | 3565 | /* Set the binding label, dest_label, either with the binding label |
3566 | stored in the given gfc_typespec, ts, or if none was provided, it | |
3567 | will be the symbol name in all lower case, as required by the draft | |
3568 | (J3/04-007, section 15.4.1). If a binding label was given and | |
3569 | there is more than one argument (num_idents), it is an error. */ | |
3570 | ||
f6bb8f4b | 3571 | gfc_try |
c5d33754 | 3572 | set_binding_label (char *dest_label, const char *sym_name, int num_idents) |
3573 | { | |
825718f9 | 3574 | if (num_idents > 1 && has_name_equals) |
c5d33754 | 3575 | { |
825718f9 | 3576 | gfc_error ("Multiple identifiers provided with " |
3577 | "single NAME= specifier at %C"); | |
3578 | return FAILURE; | |
3579 | } | |
c5d33754 | 3580 | |
825718f9 | 3581 | if (curr_binding_label[0] != '\0') |
3582 | { | |
c5d33754 | 3583 | /* Binding label given; store in temp holder til have sym. */ |
b1223b39 | 3584 | strcpy (dest_label, curr_binding_label); |
c5d33754 | 3585 | } |
3586 | else | |
3587 | { | |
3588 | /* No binding label given, and the NAME= specifier did not exist, | |
3589 | which means there was no NAME="". */ | |
3590 | if (sym_name != NULL && has_name_equals == 0) | |
b1223b39 | 3591 | strcpy (dest_label, sym_name); |
c5d33754 | 3592 | } |
3593 | ||
3594 | return SUCCESS; | |
3595 | } | |
3596 | ||
3597 | ||
3598 | /* Set the status of the given common block as being BIND(C) or not, | |
3599 | depending on the given parameter, is_bind_c. */ | |
3600 | ||
3601 | void | |
3602 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) | |
3603 | { | |
3604 | com_block->is_bind_c = is_bind_c; | |
3605 | return; | |
3606 | } | |
3607 | ||
3608 | ||
3609 | /* Verify that the given gfc_typespec is for a C interoperable type. */ | |
3610 | ||
f6bb8f4b | 3611 | gfc_try |
209d3778 | 3612 | verify_c_interop (gfc_typespec *ts) |
c5d33754 | 3613 | { |
eeebe20b | 3614 | if (ts->type == BT_DERIVED && ts->u.derived != NULL) |
5f9b1308 | 3615 | return (ts->u.derived->ts.is_c_interop || ts->u.derived->attr.is_bind_c) |
3616 | ? SUCCESS : FAILURE; | |
c5d33754 | 3617 | else if (ts->is_c_interop != 1) |
3618 | return FAILURE; | |
3619 | ||
3620 | return SUCCESS; | |
3621 | } | |
3622 | ||
3623 | ||
3624 | /* Verify that the variables of a given common block, which has been | |
3625 | defined with the attribute specifier bind(c), to be of a C | |
3626 | interoperable type. Errors will be reported here, if | |
3627 | encountered. */ | |
3628 | ||
f6bb8f4b | 3629 | gfc_try |
c5d33754 | 3630 | verify_com_block_vars_c_interop (gfc_common_head *com_block) |
3631 | { | |
3632 | gfc_symbol *curr_sym = NULL; | |
f6bb8f4b | 3633 | gfc_try retval = SUCCESS; |
c5d33754 | 3634 | |
3635 | curr_sym = com_block->head; | |
3636 | ||
3637 | /* Make sure we have at least one symbol. */ | |
3638 | if (curr_sym == NULL) | |
3639 | return retval; | |
3640 | ||
3641 | /* Here we know we have a symbol, so we'll execute this loop | |
3642 | at least once. */ | |
3643 | do | |
3644 | { | |
3645 | /* The second to last param, 1, says this is in a common block. */ | |
3646 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); | |
3647 | curr_sym = curr_sym->common_next; | |
3648 | } while (curr_sym != NULL); | |
3649 | ||
3650 | return retval; | |
3651 | } | |
3652 | ||
3653 | ||
3654 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, | |
3655 | an appropriate error message is reported. */ | |
3656 | ||
f6bb8f4b | 3657 | gfc_try |
c5d33754 | 3658 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, |
3659 | int is_in_common, gfc_common_head *com_block) | |
3660 | { | |
1f2ab120 | 3661 | bool bind_c_function = false; |
f6bb8f4b | 3662 | gfc_try retval = SUCCESS; |
4f7bb9ec | 3663 | |
1f2ab120 | 3664 | if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c) |
3665 | bind_c_function = true; | |
3666 | ||
4f7bb9ec | 3667 | if (tmp_sym->attr.function && tmp_sym->result != NULL) |
3668 | { | |
3669 | tmp_sym = tmp_sym->result; | |
3670 | /* Make sure it wasn't an implicitly typed result. */ | |
3671 | if (tmp_sym->attr.implicit_type) | |
3672 | { | |
3673 | gfc_warning ("Implicitly declared BIND(C) function '%s' at " | |
3674 | "%L may not be C interoperable", tmp_sym->name, | |
3675 | &tmp_sym->declared_at); | |
3676 | tmp_sym->ts.f90_type = tmp_sym->ts.type; | |
3677 | /* Mark it as C interoperable to prevent duplicate warnings. */ | |
3678 | tmp_sym->ts.is_c_interop = 1; | |
3679 | tmp_sym->attr.is_c_interop = 1; | |
3680 | } | |
3681 | } | |
1f2ab120 | 3682 | |
c5d33754 | 3683 | /* Here, we know we have the bind(c) attribute, so if we have |
3684 | enough type info, then verify that it's a C interop kind. | |
3685 | The info could be in the symbol already, or possibly still in | |
3686 | the given ts (current_ts), so look in both. */ | |
3687 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) | |
3688 | { | |
209d3778 | 3689 | if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS) |
c5d33754 | 3690 | { |
3691 | /* See if we're dealing with a sym in a common block or not. */ | |
3692 | if (is_in_common == 1) | |
3693 | { | |
3694 | gfc_warning ("Variable '%s' in common block '%s' at %L " | |
3695 | "may not be a C interoperable " | |
3696 | "kind though common block '%s' is BIND(C)", | |
3697 | tmp_sym->name, com_block->name, | |
3698 | &(tmp_sym->declared_at), com_block->name); | |
3699 | } | |
3700 | else | |
3701 | { | |
3702 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) | |
3703 | gfc_error ("Type declaration '%s' at %L is not C " | |
3704 | "interoperable but it is BIND(C)", | |
3705 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3706 | else | |
3707 | gfc_warning ("Variable '%s' at %L " | |
3708 | "may not be a C interoperable " | |
3709 | "kind but it is bind(c)", | |
3710 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3711 | } | |
3712 | } | |
3713 | ||
3714 | /* Variables declared w/in a common block can't be bind(c) | |
3715 | since there's no way for C to see these variables, so there's | |
3716 | semantically no reason for the attribute. */ | |
3717 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) | |
3718 | { | |
3719 | gfc_error ("Variable '%s' in common block '%s' at " | |
3720 | "%L cannot be declared with BIND(C) " | |
3721 | "since it is not a global", | |
3722 | tmp_sym->name, com_block->name, | |
3723 | &(tmp_sym->declared_at)); | |
3724 | retval = FAILURE; | |
3725 | } | |
3726 | ||
3727 | /* Scalar variables that are bind(c) can not have the pointer | |
3728 | or allocatable attributes. */ | |
3729 | if (tmp_sym->attr.is_bind_c == 1) | |
3730 | { | |
3731 | if (tmp_sym->attr.pointer == 1) | |
3732 | { | |
3733 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3734 | "POINTER and BIND(C) attributes", | |
3735 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3736 | retval = FAILURE; | |
3737 | } | |
3738 | ||
3739 | if (tmp_sym->attr.allocatable == 1) | |
3740 | { | |
3741 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3742 | "ALLOCATABLE and BIND(C) attributes", | |
3743 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3744 | retval = FAILURE; | |
3745 | } | |
3746 | ||
1f2ab120 | 3747 | } |
3748 | ||
3749 | /* If it is a BIND(C) function, make sure the return value is a | |
3750 | scalar value. The previous tests in this function made sure | |
3751 | the type is interoperable. */ | |
3752 | if (bind_c_function && tmp_sym->as != NULL) | |
3753 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3754 | "be an array", tmp_sym->name, &(tmp_sym->declared_at)); | |
3755 | ||
3756 | /* BIND(C) functions can not return a character string. */ | |
3757 | if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER) | |
eeebe20b | 3758 | if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL |
3759 | || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT | |
3760 | || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0) | |
1f2ab120 | 3761 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " |
c5d33754 | 3762 | "be a character string", tmp_sym->name, |
3763 | &(tmp_sym->declared_at)); | |
c5d33754 | 3764 | } |
3765 | ||
3766 | /* See if the symbol has been marked as private. If it has, make sure | |
3767 | there is no binding label and warn the user if there is one. */ | |
3768 | if (tmp_sym->attr.access == ACCESS_PRIVATE | |
3769 | && tmp_sym->binding_label[0] != '\0') | |
3770 | /* Use gfc_warning_now because we won't say that the symbol fails | |
3771 | just because of this. */ | |
3772 | gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " | |
3773 | "given the binding label '%s'", tmp_sym->name, | |
3774 | &(tmp_sym->declared_at), tmp_sym->binding_label); | |
3775 | ||
3776 | return retval; | |
3777 | } | |
3778 | ||
3779 | ||
3780 | /* Set the appropriate fields for a symbol that's been declared as | |
3781 | BIND(C) (the is_bind_c flag and the binding label), and verify that | |
3782 | the type is C interoperable. Errors are reported by the functions | |
3783 | used to set/test these fields. */ | |
3784 | ||
f6bb8f4b | 3785 | gfc_try |
c5d33754 | 3786 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) |
3787 | { | |
f6bb8f4b | 3788 | gfc_try retval = SUCCESS; |
c5d33754 | 3789 | |
3790 | /* TODO: Do we need to make sure the vars aren't marked private? */ | |
3791 | ||
3792 | /* Set the is_bind_c bit in symbol_attribute. */ | |
3793 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); | |
3794 | ||
3795 | if (set_binding_label (tmp_sym->binding_label, tmp_sym->name, | |
3796 | num_idents) != SUCCESS) | |
3797 | return FAILURE; | |
3798 | ||
3799 | return retval; | |
3800 | } | |
3801 | ||
3802 | ||
3803 | /* Set the fields marking the given common block as BIND(C), including | |
3804 | a binding label, and report any errors encountered. */ | |
3805 | ||
f6bb8f4b | 3806 | gfc_try |
c5d33754 | 3807 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) |
3808 | { | |
f6bb8f4b | 3809 | gfc_try retval = SUCCESS; |
c5d33754 | 3810 | |
3811 | /* destLabel, common name, typespec (which may have binding label). */ | |
3812 | if (set_binding_label (com_block->binding_label, com_block->name, num_idents) | |
3813 | != SUCCESS) | |
3814 | return FAILURE; | |
3815 | ||
3816 | /* Set the given common block (com_block) to being bind(c) (1). */ | |
3817 | set_com_block_bind_c (com_block, 1); | |
3818 | ||
3819 | return retval; | |
3820 | } | |
3821 | ||
3822 | ||
3823 | /* Retrieve the list of one or more identifiers that the given bind(c) | |
3824 | attribute applies to. */ | |
3825 | ||
f6bb8f4b | 3826 | gfc_try |
c5d33754 | 3827 | get_bind_c_idents (void) |
3828 | { | |
3829 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3830 | int num_idents = 0; | |
3831 | gfc_symbol *tmp_sym = NULL; | |
3832 | match found_id; | |
3833 | gfc_common_head *com_block = NULL; | |
3834 | ||
3835 | if (gfc_match_name (name) == MATCH_YES) | |
3836 | { | |
3837 | found_id = MATCH_YES; | |
3838 | gfc_get_ha_symbol (name, &tmp_sym); | |
3839 | } | |
3840 | else if (match_common_name (name) == MATCH_YES) | |
3841 | { | |
3842 | found_id = MATCH_YES; | |
3843 | com_block = gfc_get_common (name, 0); | |
3844 | } | |
3845 | else | |
3846 | { | |
3847 | gfc_error ("Need either entity or common block name for " | |
3848 | "attribute specification statement at %C"); | |
3849 | return FAILURE; | |
3850 | } | |
3851 | ||
3852 | /* Save the current identifier and look for more. */ | |
3853 | do | |
3854 | { | |
3855 | /* Increment the number of identifiers found for this spec stmt. */ | |
3856 | num_idents++; | |
3857 | ||
3858 | /* Make sure we have a sym or com block, and verify that it can | |
3859 | be bind(c). Set the appropriate field(s) and look for more | |
3860 | identifiers. */ | |
3861 | if (tmp_sym != NULL || com_block != NULL) | |
3862 | { | |
3863 | if (tmp_sym != NULL) | |
3864 | { | |
3865 | if (set_verify_bind_c_sym (tmp_sym, num_idents) | |
3866 | != SUCCESS) | |
3867 | return FAILURE; | |
3868 | } | |
3869 | else | |
3870 | { | |
3871 | if (set_verify_bind_c_com_block(com_block, num_idents) | |
3872 | != SUCCESS) | |
3873 | return FAILURE; | |
3874 | } | |
3875 | ||
3876 | /* Look to see if we have another identifier. */ | |
3877 | tmp_sym = NULL; | |
3878 | if (gfc_match_eos () == MATCH_YES) | |
3879 | found_id = MATCH_NO; | |
3880 | else if (gfc_match_char (',') != MATCH_YES) | |
3881 | found_id = MATCH_NO; | |
3882 | else if (gfc_match_name (name) == MATCH_YES) | |
3883 | { | |
3884 | found_id = MATCH_YES; | |
3885 | gfc_get_ha_symbol (name, &tmp_sym); | |
3886 | } | |
3887 | else if (match_common_name (name) == MATCH_YES) | |
3888 | { | |
3889 | found_id = MATCH_YES; | |
3890 | com_block = gfc_get_common (name, 0); | |
3891 | } | |
3892 | else | |
3893 | { | |
3894 | gfc_error ("Missing entity or common block name for " | |
3895 | "attribute specification statement at %C"); | |
3896 | return FAILURE; | |
3897 | } | |
3898 | } | |
3899 | else | |
3900 | { | |
3901 | gfc_internal_error ("Missing symbol"); | |
3902 | } | |
3903 | } while (found_id == MATCH_YES); | |
3904 | ||
3905 | /* if we get here we were successful */ | |
3906 | return SUCCESS; | |
3907 | } | |
3908 | ||
3909 | ||
3910 | /* Try and match a BIND(C) attribute specification statement. */ | |
3911 | ||
3912 | match | |
3913 | gfc_match_bind_c_stmt (void) | |
3914 | { | |
3915 | match found_match = MATCH_NO; | |
3916 | gfc_typespec *ts; | |
3917 | ||
3918 | ts = ¤t_ts; | |
3919 | ||
3920 | /* This may not be necessary. */ | |
3921 | gfc_clear_ts (ts); | |
3922 | /* Clear the temporary binding label holder. */ | |
3923 | curr_binding_label[0] = '\0'; | |
3924 | ||
3925 | /* Look for the bind(c). */ | |
75ae7f6c | 3926 | found_match = gfc_match_bind_c (NULL, true); |
c5d33754 | 3927 | |
3928 | if (found_match == MATCH_YES) | |
3929 | { | |
3930 | /* Look for the :: now, but it is not required. */ | |
3931 | gfc_match (" :: "); | |
3932 | ||
3933 | /* Get the identifier(s) that needs to be updated. This may need to | |
3934 | change to hand the flag(s) for the attr specified so all identifiers | |
3935 | found can have all appropriate parts updated (assuming that the same | |
3936 | spec stmt can have multiple attrs, such as both bind(c) and | |
3937 | allocatable...). */ | |
3938 | if (get_bind_c_idents () != SUCCESS) | |
3939 | /* Error message should have printed already. */ | |
3940 | return MATCH_ERROR; | |
3941 | } | |
3942 | ||
3943 | return found_match; | |
3944 | } | |
3945 | ||
3946 | ||
4ee9c684 | 3947 | /* Match a data declaration statement. */ |
3948 | ||
3949 | match | |
3950 | gfc_match_data_decl (void) | |
3951 | { | |
3952 | gfc_symbol *sym; | |
3953 | match m; | |
3923b69f | 3954 | int elem; |
4ee9c684 | 3955 | |
c5d33754 | 3956 | num_idents_on_line = 0; |
3957 | ||
e8152f13 | 3958 | m = gfc_match_decl_type_spec (¤t_ts, 0); |
4ee9c684 | 3959 | if (m != MATCH_YES) |
3960 | return m; | |
3961 | ||
b3704193 | 3962 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
3963 | && gfc_current_state () != COMP_DERIVED) | |
4ee9c684 | 3964 | { |
eeebe20b | 3965 | sym = gfc_use_derived (current_ts.u.derived); |
4ee9c684 | 3966 | |
3967 | if (sym == NULL) | |
3968 | { | |
3969 | m = MATCH_ERROR; | |
3970 | goto cleanup; | |
3971 | } | |
3972 | ||
eeebe20b | 3973 | current_ts.u.derived = sym; |
4ee9c684 | 3974 | } |
3975 | ||
3976 | m = match_attr_spec (); | |
3977 | if (m == MATCH_ERROR) | |
3978 | { | |
3979 | m = MATCH_NO; | |
3980 | goto cleanup; | |
3981 | } | |
3982 | ||
b3704193 | 3983 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
3984 | && current_ts.u.derived->components == NULL | |
eeebe20b | 3985 | && !current_ts.u.derived->attr.zero_comp) |
4ee9c684 | 3986 | { |
3987 | ||
3988 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
3989 | goto ok; | |
3990 | ||
eeebe20b | 3991 | gfc_find_symbol (current_ts.u.derived->name, |
3992 | current_ts.u.derived->ns->parent, 1, &sym); | |
4ee9c684 | 3993 | |
40cf8078 | 3994 | /* Any symbol that we find had better be a type definition |
1a9745d2 | 3995 | which has its components defined. */ |
40cf8078 | 3996 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
eeebe20b | 3997 | && (current_ts.u.derived->components != NULL |
3998 | || current_ts.u.derived->attr.zero_comp)) | |
4ee9c684 | 3999 | goto ok; |
4000 | ||
40cf8078 | 4001 | /* Now we have an error, which we signal, and then fix up |
4002 | because the knock-on is plain and simple confusing. */ | |
4003 | gfc_error_now ("Derived type at %C has not been previously defined " | |
1a9745d2 | 4004 | "and so cannot appear in a derived type definition"); |
40cf8078 | 4005 | current_attr.pointer = 1; |
4006 | goto ok; | |
4ee9c684 | 4007 | } |
4008 | ||
4009 | ok: | |
4010 | /* If we have an old-style character declaration, and no new-style | |
4011 | attribute specifications, then there a comma is optional between | |
4012 | the type specification and the variable list. */ | |
4013 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
4014 | gfc_match_char (','); | |
4015 | ||
3923b69f | 4016 | /* Give the types/attributes to symbols that follow. Give the element |
4017 | a number so that repeat character length expressions can be copied. */ | |
4018 | elem = 1; | |
4ee9c684 | 4019 | for (;;) |
4020 | { | |
c5d33754 | 4021 | num_idents_on_line++; |
3923b69f | 4022 | m = variable_decl (elem++); |
4ee9c684 | 4023 | if (m == MATCH_ERROR) |
4024 | goto cleanup; | |
4025 | if (m == MATCH_NO) | |
4026 | break; | |
4027 | ||
4028 | if (gfc_match_eos () == MATCH_YES) | |
4029 | goto cleanup; | |
4030 | if (gfc_match_char (',') != MATCH_YES) | |
4031 | break; | |
4032 | } | |
4033 | ||
8f0bdb23 | 4034 | if (gfc_error_flag_test () == 0) |
4035 | gfc_error ("Syntax error in data declaration at %C"); | |
4ee9c684 | 4036 | m = MATCH_ERROR; |
4037 | ||
af29c1f0 | 4038 | gfc_free_data_all (gfc_current_ns); |
4039 | ||
4ee9c684 | 4040 | cleanup: |
4041 | gfc_free_array_spec (current_as); | |
4042 | current_as = NULL; | |
4043 | return m; | |
4044 | } | |
4045 | ||
4046 | ||
4047 | /* Match a prefix associated with a function or subroutine | |
4048 | declaration. If the typespec pointer is nonnull, then a typespec | |
4049 | can be matched. Note that if nothing matches, MATCH_YES is | |
4050 | returned (the null string was matched). */ | |
4051 | ||
077932f9 | 4052 | match |
4053 | gfc_match_prefix (gfc_typespec *ts) | |
4ee9c684 | 4054 | { |
5b11d932 | 4055 | bool seen_type; |
4e4ea00b | 4056 | bool seen_impure; |
4057 | bool found_prefix; | |
4ee9c684 | 4058 | |
4059 | gfc_clear_attr (¤t_attr); | |
4e4ea00b | 4060 | seen_type = false; |
4061 | seen_impure = false; | |
4ee9c684 | 4062 | |
d1645c7b | 4063 | gcc_assert (!gfc_matching_prefix); |
4064 | gfc_matching_prefix = true; | |
40de255b | 4065 | |
4e4ea00b | 4066 | do |
4ee9c684 | 4067 | { |
4e4ea00b | 4068 | found_prefix = false; |
4ee9c684 | 4069 | |
4e4ea00b | 4070 | if (!seen_type && ts != NULL |
4071 | && gfc_match_decl_type_spec (ts, 0) == MATCH_YES | |
4072 | && gfc_match_space () == MATCH_YES) | |
4073 | { | |
4ee9c684 | 4074 | |
4e4ea00b | 4075 | seen_type = true; |
4076 | found_prefix = true; | |
4077 | } | |
4078 | ||
4079 | if (gfc_match ("elemental% ") == MATCH_YES) | |
4080 | { | |
4081 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
4082 | goto error; | |
4083 | ||
4084 | found_prefix = true; | |
4085 | } | |
4086 | ||
4087 | if (gfc_match ("pure% ") == MATCH_YES) | |
4088 | { | |
4089 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
4090 | goto error; | |
4091 | ||
4092 | found_prefix = true; | |
4093 | } | |
4ee9c684 | 4094 | |
4e4ea00b | 4095 | if (gfc_match ("recursive% ") == MATCH_YES) |
4096 | { | |
4097 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
4098 | goto error; | |
4099 | ||
4100 | found_prefix = true; | |
4101 | } | |
4102 | ||
4103 | /* IMPURE is a somewhat special case, as it needs not set an actual | |
4104 | attribute but rather only prevents ELEMENTAL routines from being | |
4105 | automatically PURE. */ | |
4106 | if (gfc_match ("impure% ") == MATCH_YES) | |
4107 | { | |
4108 | if (gfc_notify_std (GFC_STD_F2008, | |
4109 | "Fortran 2008: IMPURE procedure at %C") | |
4110 | == FAILURE) | |
4111 | goto error; | |
4112 | ||
4113 | seen_impure = true; | |
4114 | found_prefix = true; | |
4115 | } | |
4ee9c684 | 4116 | } |
4e4ea00b | 4117 | while (found_prefix); |
4ee9c684 | 4118 | |
4e4ea00b | 4119 | /* IMPURE and PURE must not both appear, of course. */ |
4120 | if (seen_impure && current_attr.pure) | |
4ee9c684 | 4121 | { |
4e4ea00b | 4122 | gfc_error ("PURE and IMPURE must not appear both at %C"); |
4123 | goto error; | |
4ee9c684 | 4124 | } |
4125 | ||
4e4ea00b | 4126 | /* If IMPURE it not seen but the procedure is ELEMENTAL, mark it as PURE. */ |
4127 | if (!seen_impure && current_attr.elemental && !current_attr.pure) | |
4ee9c684 | 4128 | { |
4e4ea00b | 4129 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) |
40de255b | 4130 | goto error; |
4ee9c684 | 4131 | } |
4132 | ||
4133 | /* At this point, the next item is not a prefix. */ | |
d1645c7b | 4134 | gcc_assert (gfc_matching_prefix); |
4135 | gfc_matching_prefix = false; | |
4ee9c684 | 4136 | return MATCH_YES; |
40de255b | 4137 | |
4138 | error: | |
d1645c7b | 4139 | gcc_assert (gfc_matching_prefix); |
4140 | gfc_matching_prefix = false; | |
40de255b | 4141 | return MATCH_ERROR; |
4ee9c684 | 4142 | } |
4143 | ||
4144 | ||
077932f9 | 4145 | /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */ |
4ee9c684 | 4146 | |
f6bb8f4b | 4147 | static gfc_try |
1a9745d2 | 4148 | copy_prefix (symbol_attribute *dest, locus *where) |
4ee9c684 | 4149 | { |
4ee9c684 | 4150 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
4151 | return FAILURE; | |
4152 | ||
4153 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
4154 | return FAILURE; | |
4155 | ||
4156 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
4157 | return FAILURE; | |
4158 | ||
4159 | return SUCCESS; | |
4160 | } | |
4161 | ||
4162 | ||
4163 | /* Match a formal argument list. */ | |
4164 | ||
4165 | match | |
1a9745d2 | 4166 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
4ee9c684 | 4167 | { |
4168 | gfc_formal_arglist *head, *tail, *p, *q; | |
4169 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4170 | gfc_symbol *sym; | |
4171 | match m; | |
4172 | ||
4173 | head = tail = NULL; | |
4174 | ||
4175 | if (gfc_match_char ('(') != MATCH_YES) | |
4176 | { | |
4177 | if (null_flag) | |
4178 | goto ok; | |
4179 | return MATCH_NO; | |
4180 | } | |
4181 | ||
4182 | if (gfc_match_char (')') == MATCH_YES) | |
4183 | goto ok; | |
4184 | ||
4185 | for (;;) | |
4186 | { | |
4187 | if (gfc_match_char ('*') == MATCH_YES) | |
4188 | sym = NULL; | |
4189 | else | |
4190 | { | |
4191 | m = gfc_match_name (name); | |
4192 | if (m != MATCH_YES) | |
4193 | goto cleanup; | |
4194 | ||
4195 | if (gfc_get_symbol (name, NULL, &sym)) | |
4196 | goto cleanup; | |
4197 | } | |
4198 | ||
4199 | p = gfc_get_formal_arglist (); | |
4200 | ||
4201 | if (head == NULL) | |
4202 | head = tail = p; | |
4203 | else | |
4204 | { | |
4205 | tail->next = p; | |
4206 | tail = p; | |
4207 | } | |
4208 | ||
4209 | tail->sym = sym; | |
4210 | ||
4211 | /* We don't add the VARIABLE flavor because the name could be a | |
1a9745d2 | 4212 | dummy procedure. We don't apply these attributes to formal |
4213 | arguments of statement functions. */ | |
4ee9c684 | 4214 | if (sym != NULL && !st_flag |
950683ed | 4215 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
4ee9c684 | 4216 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
4217 | { | |
4218 | m = MATCH_ERROR; | |
4219 | goto cleanup; | |
4220 | } | |
4221 | ||
4222 | /* The name of a program unit can be in a different namespace, | |
1a9745d2 | 4223 | so check for it explicitly. After the statement is accepted, |
4224 | the name is checked for especially in gfc_get_symbol(). */ | |
4ee9c684 | 4225 | if (gfc_new_block != NULL && sym != NULL |
4226 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
4227 | { | |
4228 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
4229 | sym->name); | |
4230 | m = MATCH_ERROR; | |
4231 | goto cleanup; | |
4232 | } | |
4233 | ||
4234 | if (gfc_match_char (')') == MATCH_YES) | |
4235 | goto ok; | |
4236 | ||
4237 | m = gfc_match_char (','); | |
4238 | if (m != MATCH_YES) | |
4239 | { | |
4240 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
4241 | goto cleanup; | |
4242 | } | |
4243 | } | |
4244 | ||
4245 | ok: | |
4246 | /* Check for duplicate symbols in the formal argument list. */ | |
4247 | if (head != NULL) | |
4248 | { | |
4249 | for (p = head; p->next; p = p->next) | |
4250 | { | |
4251 | if (p->sym == NULL) | |
4252 | continue; | |
4253 | ||
4254 | for (q = p->next; q; q = q->next) | |
4255 | if (p->sym == q->sym) | |
4256 | { | |
1a9745d2 | 4257 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
4258 | "at %C", p->sym->name); | |
4ee9c684 | 4259 | |
4260 | m = MATCH_ERROR; | |
4261 | goto cleanup; | |
4262 | } | |
4263 | } | |
4264 | } | |
4265 | ||
f6d0e37a | 4266 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) |
4267 | == FAILURE) | |
4ee9c684 | 4268 | { |
4269 | m = MATCH_ERROR; | |
4270 | goto cleanup; | |
4271 | } | |
4272 | ||
4273 | return MATCH_YES; | |
4274 | ||
4275 | cleanup: | |
4276 | gfc_free_formal_arglist (head); | |
4277 | return m; | |
4278 | } | |
4279 | ||
4280 | ||
4281 | /* Match a RESULT specification following a function declaration or | |
4282 | ENTRY statement. Also matches the end-of-statement. */ | |
4283 | ||
4284 | static match | |
f6d0e37a | 4285 | match_result (gfc_symbol *function, gfc_symbol **result) |
4ee9c684 | 4286 | { |
4287 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4288 | gfc_symbol *r; | |
4289 | match m; | |
4290 | ||
4291 | if (gfc_match (" result (") != MATCH_YES) | |
4292 | return MATCH_NO; | |
4293 | ||
4294 | m = gfc_match_name (name); | |
4295 | if (m != MATCH_YES) | |
4296 | return m; | |
4297 | ||
c5d33754 | 4298 | /* Get the right paren, and that's it because there could be the |
4299 | bind(c) attribute after the result clause. */ | |
4300 | if (gfc_match_char(')') != MATCH_YES) | |
4ee9c684 | 4301 | { |
c5d33754 | 4302 | /* TODO: should report the missing right paren here. */ |
4ee9c684 | 4303 | return MATCH_ERROR; |
4304 | } | |
4305 | ||
4306 | if (strcmp (function->name, name) == 0) | |
4307 | { | |
1a9745d2 | 4308 | gfc_error ("RESULT variable at %C must be different than function name"); |
4ee9c684 | 4309 | return MATCH_ERROR; |
4310 | } | |
4311 | ||
4312 | if (gfc_get_symbol (name, NULL, &r)) | |
4313 | return MATCH_ERROR; | |
4314 | ||
f6d3042b | 4315 | if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE) |
4ee9c684 | 4316 | return MATCH_ERROR; |
4317 | ||
4318 | *result = r; | |
4319 | ||
4320 | return MATCH_YES; | |
4321 | } | |
4322 | ||
4323 | ||
c5d33754 | 4324 | /* Match a function suffix, which could be a combination of a result |
4325 | clause and BIND(C), either one, or neither. The draft does not | |
4326 | require them to come in a specific order. */ | |
4327 | ||
4328 | match | |
4329 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) | |
4330 | { | |
4331 | match is_bind_c; /* Found bind(c). */ | |
4332 | match is_result; /* Found result clause. */ | |
4333 | match found_match; /* Status of whether we've found a good match. */ | |
e0be6f02 | 4334 | char peek_char; /* Character we're going to peek at. */ |
75ae7f6c | 4335 | bool allow_binding_name; |
c5d33754 | 4336 | |
4337 | /* Initialize to having found nothing. */ | |
4338 | found_match = MATCH_NO; | |
4339 | is_bind_c = MATCH_NO; | |
4340 | is_result = MATCH_NO; | |
4341 | ||
4342 | /* Get the next char to narrow between result and bind(c). */ | |
4343 | gfc_gobble_whitespace (); | |
e0be6f02 | 4344 | peek_char = gfc_peek_ascii_char (); |
c5d33754 | 4345 | |
75ae7f6c | 4346 | /* C binding names are not allowed for internal procedures. */ |
4347 | if (gfc_current_state () == COMP_CONTAINS | |
4348 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
4349 | allow_binding_name = false; | |
4350 | else | |
4351 | allow_binding_name = true; | |
4352 | ||
c5d33754 | 4353 | switch (peek_char) |
4354 | { | |
4355 | case 'r': | |
4356 | /* Look for result clause. */ | |
4357 | is_result = match_result (sym, result); | |
4358 | if (is_result == MATCH_YES) | |
4359 | { | |
4360 | /* Now see if there is a bind(c) after it. */ | |
75ae7f6c | 4361 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 4362 | /* We've found the result clause and possibly bind(c). */ |
4363 | found_match = MATCH_YES; | |
4364 | } | |
4365 | else | |
4366 | /* This should only be MATCH_ERROR. */ | |
4367 | found_match = is_result; | |
4368 | break; | |
4369 | case 'b': | |
4370 | /* Look for bind(c) first. */ | |
75ae7f6c | 4371 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 4372 | if (is_bind_c == MATCH_YES) |
4373 | { | |
4374 | /* Now see if a result clause followed it. */ | |
4375 | is_result = match_result (sym, result); | |
4376 | found_match = MATCH_YES; | |
4377 | } | |
4378 | else | |
4379 | { | |
4380 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ | |
4381 | found_match = MATCH_ERROR; | |
4382 | } | |
4383 | break; | |
4384 | default: | |
4385 | gfc_error ("Unexpected junk after function declaration at %C"); | |
4386 | found_match = MATCH_ERROR; | |
4387 | break; | |
4388 | } | |
4389 | ||
c5d33754 | 4390 | if (is_bind_c == MATCH_YES) |
4518e961 | 4391 | { |
75ae7f6c | 4392 | /* Fortran 2008 draft allows BIND(C) for internal procedures. */ |
4518e961 | 4393 | if (gfc_current_state () == COMP_CONTAINS |
75ae7f6c | 4394 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
2dcae6c7 | 4395 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
4396 | "at %L may not be specified for an internal " | |
4397 | "procedure", &gfc_current_locus) | |
75ae7f6c | 4398 | == FAILURE) |
4399 | return MATCH_ERROR; | |
4400 | ||
4518e961 | 4401 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) |
4402 | == FAILURE) | |
4403 | return MATCH_ERROR; | |
4404 | } | |
c5d33754 | 4405 | |
4406 | return found_match; | |
4407 | } | |
4408 | ||
4409 | ||
1e057e9b | 4410 | /* Procedure pointer return value without RESULT statement: |
4411 | Add "hidden" result variable named "ppr@". */ | |
4412 | ||
4413 | static gfc_try | |
4414 | add_hidden_procptr_result (gfc_symbol *sym) | |
4415 | { | |
4416 | bool case1,case2; | |
4417 | ||
4418 | if (gfc_notification_std (GFC_STD_F2003) == ERROR) | |
4419 | return FAILURE; | |
4420 | ||
4421 | /* First usage case: PROCEDURE and EXTERNAL statements. */ | |
4422 | case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block () | |
4423 | && strcmp (gfc_current_block ()->name, sym->name) == 0 | |
4424 | && sym->attr.external; | |
4425 | /* Second usage case: INTERFACE statements. */ | |
4426 | case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous | |
4427 | && gfc_state_stack->previous->state == COMP_FUNCTION | |
4428 | && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0; | |
4429 | ||
4430 | if (case1 || case2) | |
4431 | { | |
4432 | gfc_symtree *stree; | |
4433 | if (case1) | |
36b0a1b0 | 4434 | gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false); |
1e057e9b | 4435 | else if (case2) |
180a5dc0 | 4436 | { |
4437 | gfc_symtree *st2; | |
36b0a1b0 | 4438 | gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false); |
180a5dc0 | 4439 | st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@"); |
4440 | st2->n.sym = stree->n.sym; | |
4441 | } | |
1e057e9b | 4442 | sym->result = stree->n.sym; |
4443 | ||
4444 | sym->result->attr.proc_pointer = sym->attr.proc_pointer; | |
4445 | sym->result->attr.pointer = sym->attr.pointer; | |
4446 | sym->result->attr.external = sym->attr.external; | |
4447 | sym->result->attr.referenced = sym->attr.referenced; | |
e40ac2fe | 4448 | sym->result->ts = sym->ts; |
1e057e9b | 4449 | sym->attr.proc_pointer = 0; |
4450 | sym->attr.pointer = 0; | |
4451 | sym->attr.external = 0; | |
4452 | if (sym->result->attr.external && sym->result->attr.pointer) | |
4453 | { | |
4454 | sym->result->attr.pointer = 0; | |
4455 | sym->result->attr.proc_pointer = 1; | |
4456 | } | |
4457 | ||
4458 | return gfc_add_result (&sym->result->attr, sym->result->name, NULL); | |
4459 | } | |
4460 | /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */ | |
4461 | else if (sym->attr.function && !sym->attr.external && sym->attr.pointer | |
4462 | && sym->result && sym->result != sym && sym->result->attr.external | |
4463 | && sym == gfc_current_ns->proc_name | |
4464 | && sym == sym->result->ns->proc_name | |
4465 | && strcmp ("ppr@", sym->result->name) == 0) | |
4466 | { | |
4467 | sym->result->attr.proc_pointer = 1; | |
4468 | sym->attr.pointer = 0; | |
4469 | return SUCCESS; | |
4470 | } | |
4471 | else | |
4472 | return FAILURE; | |
4473 | } | |
4474 | ||
4475 | ||
64e93293 | 4476 | /* Match the interface for a PROCEDURE declaration, |
4477 | including brackets (R1212). */ | |
af1a34ee | 4478 | |
4479 | static match | |
64e93293 | 4480 | match_procedure_interface (gfc_symbol **proc_if) |
af1a34ee | 4481 | { |
4482 | match m; | |
1eb2b542 | 4483 | gfc_symtree *st; |
af1a34ee | 4484 | locus old_loc, entry_loc; |
1eb2b542 | 4485 | gfc_namespace *old_ns = gfc_current_ns; |
4486 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
af1a34ee | 4487 | |
1eb2b542 | 4488 | old_loc = entry_loc = gfc_current_locus; |
af1a34ee | 4489 | gfc_clear_ts (¤t_ts); |
4490 | ||
4491 | if (gfc_match (" (") != MATCH_YES) | |
4492 | { | |
4493 | gfc_current_locus = entry_loc; | |
4494 | return MATCH_NO; | |
4495 | } | |
4496 | ||
4497 | /* Get the type spec. for the procedure interface. */ | |
4498 | old_loc = gfc_current_locus; | |
e8152f13 | 4499 | m = gfc_match_decl_type_spec (¤t_ts, 0); |
fd1277c3 | 4500 | gfc_gobble_whitespace (); |
e0be6f02 | 4501 | if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')')) |
af1a34ee | 4502 | goto got_ts; |
4503 | ||
4504 | if (m == MATCH_ERROR) | |
4505 | return m; | |
4506 | ||
1eb2b542 | 4507 | /* Procedure interface is itself a procedure. */ |
af1a34ee | 4508 | gfc_current_locus = old_loc; |
1eb2b542 | 4509 | m = gfc_match_name (name); |
af1a34ee | 4510 | |
1eb2b542 | 4511 | /* First look to see if it is already accessible in the current |
4512 | namespace because it is use associated or contained. */ | |
4513 | st = NULL; | |
4514 | if (gfc_find_sym_tree (name, NULL, 0, &st)) | |
4515 | return MATCH_ERROR; | |
4516 | ||
4517 | /* If it is still not found, then try the parent namespace, if it | |
4518 | exists and create the symbol there if it is still not found. */ | |
4519 | if (gfc_current_ns->parent) | |
4520 | gfc_current_ns = gfc_current_ns->parent; | |
4521 | if (st == NULL && gfc_get_ha_sym_tree (name, &st)) | |
4522 | return MATCH_ERROR; | |
4523 | ||
4524 | gfc_current_ns = old_ns; | |
4525 | *proc_if = st->n.sym; | |
af1a34ee | 4526 | |
4527 | /* Various interface checks. */ | |
64e93293 | 4528 | if (*proc_if) |
af1a34ee | 4529 | { |
64e93293 | 4530 | (*proc_if)->refs++; |
74113644 | 4531 | /* Resolve interface if possible. That way, attr.procedure is only set |
4532 | if it is declared by a later procedure-declaration-stmt, which is | |
4533 | invalid per C1212. */ | |
64e93293 | 4534 | while ((*proc_if)->ts.interface) |
4535 | *proc_if = (*proc_if)->ts.interface; | |
74113644 | 4536 | |
64e93293 | 4537 | if ((*proc_if)->generic) |
af1a34ee | 4538 | { |
64e93293 | 4539 | gfc_error ("Interface '%s' at %C may not be generic", |
4540 | (*proc_if)->name); | |
af1a34ee | 4541 | return MATCH_ERROR; |
4542 | } | |
64e93293 | 4543 | if ((*proc_if)->attr.proc == PROC_ST_FUNCTION) |
af1a34ee | 4544 | { |
4545 | gfc_error ("Interface '%s' at %C may not be a statement function", | |
64e93293 | 4546 | (*proc_if)->name); |
af1a34ee | 4547 | return MATCH_ERROR; |
4548 | } | |
4549 | /* Handle intrinsic procedures. */ | |
64e93293 | 4550 | if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc |
4551 | || (*proc_if)->attr.if_source == IFSRC_IFBODY) | |
4552 | && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus) | |
4553 | || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus))) | |
4554 | (*proc_if)->attr.intrinsic = 1; | |
4555 | if ((*proc_if)->attr.intrinsic | |
4556 | && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0)) | |
af1a34ee | 4557 | { |
4558 | gfc_error ("Intrinsic procedure '%s' not allowed " | |
64e93293 | 4559 | "in PROCEDURE statement at %C", (*proc_if)->name); |
af1a34ee | 4560 | return MATCH_ERROR; |
4561 | } | |
af1a34ee | 4562 | } |
4563 | ||
4564 | got_ts: | |
af1a34ee | 4565 | if (gfc_match (" )") != MATCH_YES) |
4566 | { | |
4567 | gfc_current_locus = entry_loc; | |
4568 | return MATCH_NO; | |
4569 | } | |
4570 | ||
64e93293 | 4571 | return MATCH_YES; |
4572 | } | |
4573 | ||
4574 | ||
4575 | /* Match a PROCEDURE declaration (R1211). */ | |
4576 | ||
4577 | static match | |
4578 | match_procedure_decl (void) | |
4579 | { | |
4580 | match m; | |
4581 | gfc_symbol *sym, *proc_if = NULL; | |
4582 | int num; | |
4583 | gfc_expr *initializer = NULL; | |
4584 | ||
4585 | /* Parse interface (with brackets). */ | |
4586 | m = match_procedure_interface (&proc_if); | |
4587 | if (m != MATCH_YES) | |
4588 | return m; | |
4589 | ||
4590 | /* Parse attributes (with colons). */ | |
af1a34ee | 4591 | m = match_attr_spec(); |
4592 | if (m == MATCH_ERROR) | |
4593 | return MATCH_ERROR; | |
4594 | ||
4595 | /* Get procedure symbols. */ | |
4596 | for(num=1;;num++) | |
4597 | { | |
af1a34ee | 4598 | m = gfc_match_symbol (&sym, 0); |
4599 | if (m == MATCH_NO) | |
4600 | goto syntax; | |
4601 | else if (m == MATCH_ERROR) | |
4602 | return m; | |
4603 | ||
4604 | /* Add current_attr to the symbol attributes. */ | |
4605 | if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
4606 | return MATCH_ERROR; | |
4607 | ||
4608 | if (sym->attr.is_bind_c) | |
4609 | { | |
4610 | /* Check for C1218. */ | |
4611 | if (!proc_if || !proc_if->attr.is_bind_c) | |
4612 | { | |
4613 | gfc_error ("BIND(C) attribute at %C requires " | |
4614 | "an interface with BIND(C)"); | |
4615 | return MATCH_ERROR; | |
4616 | } | |
4617 | /* Check for C1217. */ | |
4618 | if (has_name_equals && sym->attr.pointer) | |
4619 | { | |
4620 | gfc_error ("BIND(C) procedure with NAME may not have " | |
4621 | "POINTER attribute at %C"); | |
4622 | return MATCH_ERROR; | |
4623 | } | |
4624 | if (has_name_equals && sym->attr.dummy) | |
4625 | { | |
4626 | gfc_error ("Dummy procedure at %C may not have " | |
4627 | "BIND(C) attribute with NAME"); | |
4628 | return MATCH_ERROR; | |
4629 | } | |
4630 | /* Set binding label for BIND(C). */ | |
4631 | if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS) | |
4632 | return MATCH_ERROR; | |
4633 | } | |
4634 | ||
cad0ddcf | 4635 | if (gfc_add_external (&sym->attr, NULL) == FAILURE) |
af1a34ee | 4636 | return MATCH_ERROR; |
1e057e9b | 4637 | |
4638 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4639 | sym = sym->result; | |
4640 | ||
af1a34ee | 4641 | if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE) |
4642 | return MATCH_ERROR; | |
4643 | ||
4644 | /* Set interface. */ | |
4645 | if (proc_if != NULL) | |
f7d7a083 | 4646 | { |
13a834aa | 4647 | if (sym->ts.type != BT_UNKNOWN) |
4648 | { | |
4649 | gfc_error ("Procedure '%s' at %L already has basic type of %s", | |
4650 | sym->name, &gfc_current_locus, | |
4651 | gfc_basic_typename (sym->ts.type)); | |
4652 | return MATCH_ERROR; | |
4653 | } | |
2cd2bb5c | 4654 | sym->ts.interface = proc_if; |
f7d7a083 | 4655 | sym->attr.untyped = 1; |
180a5dc0 | 4656 | sym->attr.if_source = IFSRC_IFBODY; |
f7d7a083 | 4657 | } |
af1a34ee | 4658 | else if (current_ts.type != BT_UNKNOWN) |
4659 | { | |
13a834aa | 4660 | if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) |
4661 | return MATCH_ERROR; | |
2cd2bb5c | 4662 | sym->ts.interface = gfc_new_symbol ("", gfc_current_ns); |
4663 | sym->ts.interface->ts = current_ts; | |
4664 | sym->ts.interface->attr.function = 1; | |
4665 | sym->attr.function = sym->ts.interface->attr.function; | |
180a5dc0 | 4666 | sym->attr.if_source = IFSRC_UNKNOWN; |
af1a34ee | 4667 | } |
4668 | ||
cad0ddcf | 4669 | if (gfc_match (" =>") == MATCH_YES) |
4670 | { | |
4671 | if (!current_attr.pointer) | |
4672 | { | |
4673 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
4674 | m = MATCH_ERROR; | |
4675 | goto cleanup; | |
4676 | } | |
4677 | ||
4678 | m = gfc_match_null (&initializer); | |
4679 | if (m == MATCH_NO) | |
4680 | { | |
4681 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4682 | m = MATCH_ERROR; | |
4683 | } | |
4684 | ||
4685 | if (gfc_pure (NULL)) | |
4686 | { | |
4687 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4688 | "a PURE procedure"); | |
4689 | m = MATCH_ERROR; | |
4690 | } | |
4691 | ||
4692 | if (m != MATCH_YES) | |
4693 | goto cleanup; | |
4694 | ||
4695 | if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus) | |
4696 | != SUCCESS) | |
4697 | goto cleanup; | |
4698 | ||
4699 | } | |
4700 | ||
4701 | gfc_set_sym_referenced (sym); | |
4702 | ||
af1a34ee | 4703 | if (gfc_match_eos () == MATCH_YES) |
4704 | return MATCH_YES; | |
4705 | if (gfc_match_char (',') != MATCH_YES) | |
4706 | goto syntax; | |
4707 | } | |
4708 | ||
4709 | syntax: | |
4710 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4711 | return MATCH_ERROR; | |
cad0ddcf | 4712 | |
4713 | cleanup: | |
4714 | /* Free stuff up and return. */ | |
4715 | gfc_free_expr (initializer); | |
4716 | return m; | |
af1a34ee | 4717 | } |
4718 | ||
4719 | ||
64e93293 | 4720 | static match |
4721 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc); | |
4722 | ||
4723 | ||
4724 | /* Match a procedure pointer component declaration (R445). */ | |
4725 | ||
4726 | static match | |
4727 | match_ppc_decl (void) | |
4728 | { | |
4729 | match m; | |
4730 | gfc_symbol *proc_if = NULL; | |
4731 | gfc_typespec ts; | |
4732 | int num; | |
4733 | gfc_component *c; | |
4734 | gfc_expr *initializer = NULL; | |
4735 | gfc_typebound_proc* tb; | |
4736 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4737 | ||
4738 | /* Parse interface (with brackets). */ | |
4739 | m = match_procedure_interface (&proc_if); | |
4740 | if (m != MATCH_YES) | |
4741 | goto syntax; | |
4742 | ||
4743 | /* Parse attributes. */ | |
4744 | tb = XCNEW (gfc_typebound_proc); | |
4745 | tb->where = gfc_current_locus; | |
4746 | m = match_binding_attributes (tb, false, true); | |
4747 | if (m == MATCH_ERROR) | |
4748 | return m; | |
4749 | ||
64e93293 | 4750 | gfc_clear_attr (¤t_attr); |
4751 | current_attr.procedure = 1; | |
4752 | current_attr.proc_pointer = 1; | |
4753 | current_attr.access = tb->access; | |
4754 | current_attr.flavor = FL_PROCEDURE; | |
4755 | ||
4756 | /* Match the colons (required). */ | |
4757 | if (gfc_match (" ::") != MATCH_YES) | |
4758 | { | |
4759 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
4760 | return MATCH_ERROR; | |
4761 | } | |
4762 | ||
4763 | /* Check for C450. */ | |
4764 | if (!tb->nopass && proc_if == NULL) | |
4765 | { | |
4766 | gfc_error("NOPASS or explicit interface required at %C"); | |
4767 | return MATCH_ERROR; | |
4768 | } | |
4769 | ||
8a026279 | 4770 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Procedure pointer " |
4771 | "component at %C") == FAILURE) | |
4772 | return MATCH_ERROR; | |
4773 | ||
64e93293 | 4774 | /* Match PPC names. */ |
4775 | ts = current_ts; | |
4776 | for(num=1;;num++) | |
4777 | { | |
4778 | m = gfc_match_name (name); | |
4779 | if (m == MATCH_NO) | |
4780 | goto syntax; | |
4781 | else if (m == MATCH_ERROR) | |
4782 | return m; | |
4783 | ||
4784 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
4785 | return MATCH_ERROR; | |
4786 | ||
4787 | /* Add current_attr to the symbol attributes. */ | |
4788 | if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE) | |
4789 | return MATCH_ERROR; | |
4790 | ||
4791 | if (gfc_add_external (&c->attr, NULL) == FAILURE) | |
4792 | return MATCH_ERROR; | |
4793 | ||
4794 | if (gfc_add_proc (&c->attr, name, NULL) == FAILURE) | |
4795 | return MATCH_ERROR; | |
4796 | ||
fe9b08a2 | 4797 | c->tb = tb; |
4798 | ||
64e93293 | 4799 | /* Set interface. */ |
4800 | if (proc_if != NULL) | |
4801 | { | |
4802 | c->ts.interface = proc_if; | |
4803 | c->attr.untyped = 1; | |
4804 | c->attr.if_source = IFSRC_IFBODY; | |
4805 | } | |
4806 | else if (ts.type != BT_UNKNOWN) | |
4807 | { | |
4808 | c->ts = ts; | |
4809 | c->ts.interface = gfc_new_symbol ("", gfc_current_ns); | |
4810 | c->ts.interface->ts = ts; | |
4811 | c->ts.interface->attr.function = 1; | |
4812 | c->attr.function = c->ts.interface->attr.function; | |
4813 | c->attr.if_source = IFSRC_UNKNOWN; | |
4814 | } | |
4815 | ||
4816 | if (gfc_match (" =>") == MATCH_YES) | |
4817 | { | |
4818 | m = gfc_match_null (&initializer); | |
4819 | if (m == MATCH_NO) | |
4820 | { | |
4821 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4822 | m = MATCH_ERROR; | |
4823 | } | |
4824 | if (gfc_pure (NULL)) | |
4825 | { | |
4826 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4827 | "a PURE procedure"); | |
4828 | m = MATCH_ERROR; | |
4829 | } | |
4830 | if (m != MATCH_YES) | |
4831 | { | |
4832 | gfc_free_expr (initializer); | |
4833 | return m; | |
4834 | } | |
4835 | c->initializer = initializer; | |
4836 | } | |
4837 | ||
4838 | if (gfc_match_eos () == MATCH_YES) | |
4839 | return MATCH_YES; | |
4840 | if (gfc_match_char (',') != MATCH_YES) | |
4841 | goto syntax; | |
4842 | } | |
4843 | ||
4844 | syntax: | |
4845 | gfc_error ("Syntax error in procedure pointer component at %C"); | |
4846 | return MATCH_ERROR; | |
4847 | } | |
4848 | ||
4849 | ||
af1a34ee | 4850 | /* Match a PROCEDURE declaration inside an interface (R1206). */ |
4851 | ||
4852 | static match | |
4853 | match_procedure_in_interface (void) | |
4854 | { | |
4855 | match m; | |
4856 | gfc_symbol *sym; | |
4857 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4858 | ||
4859 | if (current_interface.type == INTERFACE_NAMELESS | |
4860 | || current_interface.type == INTERFACE_ABSTRACT) | |
4861 | { | |
4862 | gfc_error ("PROCEDURE at %C must be in a generic interface"); | |
4863 | return MATCH_ERROR; | |
4864 | } | |
4865 | ||
4866 | for(;;) | |
4867 | { | |
4868 | m = gfc_match_name (name); | |
4869 | if (m == MATCH_NO) | |
4870 | goto syntax; | |
4871 | else if (m == MATCH_ERROR) | |
4872 | return m; | |
4873 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
4874 | return MATCH_ERROR; | |
4875 | ||
4876 | if (gfc_add_interface (sym) == FAILURE) | |
4877 | return MATCH_ERROR; | |
4878 | ||
af1a34ee | 4879 | if (gfc_match_eos () == MATCH_YES) |
4880 | break; | |
4881 | if (gfc_match_char (',') != MATCH_YES) | |
4882 | goto syntax; | |
4883 | } | |
4884 | ||
4885 | return MATCH_YES; | |
4886 | ||
4887 | syntax: | |
4888 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4889 | return MATCH_ERROR; | |
4890 | } | |
4891 | ||
4892 | ||
4893 | /* General matcher for PROCEDURE declarations. */ | |
4894 | ||
7fd88f6e | 4895 | static match match_procedure_in_type (void); |
4896 | ||
af1a34ee | 4897 | match |
4898 | gfc_match_procedure (void) | |
4899 | { | |
4900 | match m; | |
4901 | ||
4902 | switch (gfc_current_state ()) | |
4903 | { | |
4904 | case COMP_NONE: | |
4905 | case COMP_PROGRAM: | |
4906 | case COMP_MODULE: | |
4907 | case COMP_SUBROUTINE: | |
4908 | case COMP_FUNCTION: | |
4909 | m = match_procedure_decl (); | |
4910 | break; | |
4911 | case COMP_INTERFACE: | |
4912 | m = match_procedure_in_interface (); | |
4913 | break; | |
4914 | case COMP_DERIVED: | |
64e93293 | 4915 | m = match_ppc_decl (); |
4916 | break; | |
7fd88f6e | 4917 | case COMP_DERIVED_CONTAINS: |
4918 | m = match_procedure_in_type (); | |
4919 | break; | |
af1a34ee | 4920 | default: |
4921 | return MATCH_NO; | |
4922 | } | |
4923 | ||
4924 | if (m != MATCH_YES) | |
4925 | return m; | |
4926 | ||
4927 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C") | |
4928 | == FAILURE) | |
4929 | return MATCH_ERROR; | |
4930 | ||
4931 | return m; | |
4932 | } | |
4933 | ||
4934 | ||
a34926ba | 4935 | /* Warn if a matched procedure has the same name as an intrinsic; this is |
4936 | simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current | |
4937 | parser-state-stack to find out whether we're in a module. */ | |
4938 | ||
4939 | static void | |
4940 | warn_intrinsic_shadow (const gfc_symbol* sym, bool func) | |
4941 | { | |
4942 | bool in_module; | |
4943 | ||
4944 | in_module = (gfc_state_stack->previous | |
4945 | && gfc_state_stack->previous->state == COMP_MODULE); | |
4946 | ||
4947 | gfc_warn_intrinsic_shadow (sym, in_module, func); | |
4948 | } | |
4949 | ||
4950 | ||
4ee9c684 | 4951 | /* Match a function declaration. */ |
4952 | ||
4953 | match | |
4954 | gfc_match_function_decl (void) | |
4955 | { | |
4956 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4957 | gfc_symbol *sym, *result; | |
4958 | locus old_loc; | |
4959 | match m; | |
c5d33754 | 4960 | match suffix_match; |
4961 | match found_match; /* Status returned by match func. */ | |
4ee9c684 | 4962 | |
4963 | if (gfc_current_state () != COMP_NONE | |
4964 | && gfc_current_state () != COMP_INTERFACE | |
4965 | && gfc_current_state () != COMP_CONTAINS) | |
4966 | return MATCH_NO; | |
4967 | ||
4968 | gfc_clear_ts (¤t_ts); | |
4969 | ||
cbb9e6aa | 4970 | old_loc = gfc_current_locus; |
4ee9c684 | 4971 | |
077932f9 | 4972 | m = gfc_match_prefix (¤t_ts); |
4ee9c684 | 4973 | if (m != MATCH_YES) |
4974 | { | |
cbb9e6aa | 4975 | gfc_current_locus = old_loc; |
4ee9c684 | 4976 | return m; |
4977 | } | |
4978 | ||
4979 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
4980 | { | |
cbb9e6aa | 4981 | gfc_current_locus = old_loc; |
4ee9c684 | 4982 | return MATCH_NO; |
4983 | } | |
d77f260f | 4984 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 4985 | return MATCH_ERROR; |
1e057e9b | 4986 | |
4987 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4988 | sym = sym->result; | |
4989 | ||
4ee9c684 | 4990 | gfc_new_block = sym; |
4991 | ||
4992 | m = gfc_match_formal_arglist (sym, 0, 0); | |
4993 | if (m == MATCH_NO) | |
9b435b6d | 4994 | { |
4995 | gfc_error ("Expected formal argument list in function " | |
1a9745d2 | 4996 | "definition at %C"); |
9b435b6d | 4997 | m = MATCH_ERROR; |
4998 | goto cleanup; | |
4999 | } | |
4ee9c684 | 5000 | else if (m == MATCH_ERROR) |
5001 | goto cleanup; | |
5002 | ||
5003 | result = NULL; | |
5004 | ||
c5d33754 | 5005 | /* According to the draft, the bind(c) and result clause can |
5006 | come in either order after the formal_arg_list (i.e., either | |
5007 | can be first, both can exist together or by themselves or neither | |
5008 | one). Therefore, the match_result can't match the end of the | |
5009 | string, and check for the bind(c) or result clause in either order. */ | |
5010 | found_match = gfc_match_eos (); | |
5011 | ||
5012 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
5013 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
5014 | not allowed for procedures. */ | |
5015 | if (sym->attr.is_bind_c == 1) | |
5016 | { | |
5017 | sym->attr.is_bind_c = 0; | |
5018 | if (sym->old_symbol != NULL) | |
5019 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5020 | "variables or common blocks", | |
5021 | &(sym->old_symbol->declared_at)); | |
5022 | else | |
5023 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5024 | "variables or common blocks", &gfc_current_locus); | |
4ee9c684 | 5025 | } |
5026 | ||
c5d33754 | 5027 | if (found_match != MATCH_YES) |
4ee9c684 | 5028 | { |
c5d33754 | 5029 | /* If we haven't found the end-of-statement, look for a suffix. */ |
5030 | suffix_match = gfc_match_suffix (sym, &result); | |
5031 | if (suffix_match == MATCH_YES) | |
5032 | /* Need to get the eos now. */ | |
5033 | found_match = gfc_match_eos (); | |
5034 | else | |
5035 | found_match = suffix_match; | |
4ee9c684 | 5036 | } |
5037 | ||
c5d33754 | 5038 | if(found_match != MATCH_YES) |
5039 | m = MATCH_ERROR; | |
4ee9c684 | 5040 | else |
5041 | { | |
c5d33754 | 5042 | /* Make changes to the symbol. */ |
5043 | m = MATCH_ERROR; | |
5044 | ||
5045 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) | |
5046 | goto cleanup; | |
5047 | ||
5048 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
5049 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
5050 | goto cleanup; | |
4ee9c684 | 5051 | |
8d39570e | 5052 | /* Delay matching the function characteristics until after the |
077932f9 | 5053 | specification block by signalling kind=-1. */ |
8d39570e | 5054 | sym->declared_at = old_loc; |
5055 | if (current_ts.type != BT_UNKNOWN) | |
5056 | current_ts.kind = -1; | |
5057 | else | |
5058 | current_ts.kind = 0; | |
077932f9 | 5059 | |
c5d33754 | 5060 | if (result == NULL) |
5061 | { | |
0477d42d | 5062 | if (current_ts.type != BT_UNKNOWN |
5063 | && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) | |
5064 | goto cleanup; | |
c5d33754 | 5065 | sym->result = sym; |
5066 | } | |
5067 | else | |
5068 | { | |
0477d42d | 5069 | if (current_ts.type != BT_UNKNOWN |
5070 | && gfc_add_type (result, ¤t_ts, &gfc_current_locus) | |
5071 | == FAILURE) | |
5072 | goto cleanup; | |
c5d33754 | 5073 | sym->result = result; |
5074 | } | |
5075 | ||
a34926ba | 5076 | /* Warn if this procedure has the same name as an intrinsic. */ |
5077 | warn_intrinsic_shadow (sym, true); | |
5078 | ||
c5d33754 | 5079 | return MATCH_YES; |
5080 | } | |
4ee9c684 | 5081 | |
5082 | cleanup: | |
cbb9e6aa | 5083 | gfc_current_locus = old_loc; |
4ee9c684 | 5084 | return m; |
5085 | } | |
5086 | ||
1a9745d2 | 5087 | |
5088 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
5089 | pass the name of the entry, rather than the gfc_current_block name, and | |
5090 | to return false upon finding an existing global entry. */ | |
858f9894 | 5091 | |
5092 | static bool | |
1a9745d2 | 5093 | add_global_entry (const char *name, int sub) |
858f9894 | 5094 | { |
5095 | gfc_gsymbol *s; | |
8458f4ca | 5096 | enum gfc_symbol_type type; |
858f9894 | 5097 | |
5098 | s = gfc_get_gsymbol(name); | |
5b11d932 | 5099 | type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; |
858f9894 | 5100 | |
5101 | if (s->defined | |
1a9745d2 | 5102 | || (s->type != GSYM_UNKNOWN |
5b11d932 | 5103 | && s->type != type)) |
cbbac028 | 5104 | gfc_global_used(s, NULL); |
858f9894 | 5105 | else |
5106 | { | |
5b11d932 | 5107 | s->type = type; |
858f9894 | 5108 | s->where = gfc_current_locus; |
5109 | s->defined = 1; | |
83aeedb9 | 5110 | s->ns = gfc_current_ns; |
858f9894 | 5111 | return true; |
5112 | } | |
5113 | return false; | |
5114 | } | |
4ee9c684 | 5115 | |
1a9745d2 | 5116 | |
4ee9c684 | 5117 | /* Match an ENTRY statement. */ |
5118 | ||
5119 | match | |
5120 | gfc_match_entry (void) | |
5121 | { | |
1b716045 | 5122 | gfc_symbol *proc; |
5123 | gfc_symbol *result; | |
5124 | gfc_symbol *entry; | |
4ee9c684 | 5125 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
5126 | gfc_compile_state state; | |
5127 | match m; | |
1b716045 | 5128 | gfc_entry_list *el; |
7b5e1acc | 5129 | locus old_loc; |
d77f260f | 5130 | bool module_procedure; |
86f0974b | 5131 | char peek_char; |
5132 | match is_bind_c; | |
4ee9c684 | 5133 | |
5134 | m = gfc_match_name (name); | |
5135 | if (m != MATCH_YES) | |
5136 | return m; | |
5137 | ||
a3b81b0f | 5138 | if (gfc_notify_std (GFC_STD_F2008_OBS, "Fortran 2008 obsolescent feature: " |
5139 | "ENTRY statement at %C") == FAILURE) | |
5140 | return MATCH_ERROR; | |
5141 | ||
1b716045 | 5142 | state = gfc_current_state (); |
ea37f786 | 5143 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
1b716045 | 5144 | { |
ea37f786 | 5145 | switch (state) |
5146 | { | |
5147 | case COMP_PROGRAM: | |
5148 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
5149 | break; | |
5150 | case COMP_MODULE: | |
5151 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
5152 | break; | |
5153 | case COMP_BLOCK_DATA: | |
1a9745d2 | 5154 | gfc_error ("ENTRY statement at %C cannot appear within " |
5155 | "a BLOCK DATA"); | |
ea37f786 | 5156 | break; |
5157 | case COMP_INTERFACE: | |
1a9745d2 | 5158 | gfc_error ("ENTRY statement at %C cannot appear within " |
5159 | "an INTERFACE"); | |
ea37f786 | 5160 | break; |
5161 | case COMP_DERIVED: | |
1a9745d2 | 5162 | gfc_error ("ENTRY statement at %C cannot appear within " |
5163 | "a DERIVED TYPE block"); | |
ea37f786 | 5164 | break; |
5165 | case COMP_IF: | |
1a9745d2 | 5166 | gfc_error ("ENTRY statement at %C cannot appear within " |
5167 | "an IF-THEN block"); | |
ea37f786 | 5168 | break; |
5169 | case COMP_DO: | |
1a9745d2 | 5170 | gfc_error ("ENTRY statement at %C cannot appear within " |
5171 | "a DO block"); | |
ea37f786 | 5172 | break; |
5173 | case COMP_SELECT: | |
1a9745d2 | 5174 | gfc_error ("ENTRY statement at %C cannot appear within " |
5175 | "a SELECT block"); | |
ea37f786 | 5176 | break; |
5177 | case COMP_FORALL: | |
1a9745d2 | 5178 | gfc_error ("ENTRY statement at %C cannot appear within " |
5179 | "a FORALL block"); | |
ea37f786 | 5180 | break; |
5181 | case COMP_WHERE: | |
1a9745d2 | 5182 | gfc_error ("ENTRY statement at %C cannot appear within " |
5183 | "a WHERE block"); | |
ea37f786 | 5184 | break; |
5185 | case COMP_CONTAINS: | |
1a9745d2 | 5186 | gfc_error ("ENTRY statement at %C cannot appear within " |
5187 | "a contained subprogram"); | |
ea37f786 | 5188 | break; |
5189 | default: | |
5190 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
5191 | } | |
1b716045 | 5192 | return MATCH_ERROR; |
5193 | } | |
5194 | ||
d77f260f | 5195 | module_procedure = gfc_current_ns->parent != NULL |
1a9745d2 | 5196 | && gfc_current_ns->parent->proc_name |
5197 | && gfc_current_ns->parent->proc_name->attr.flavor | |
5198 | == FL_MODULE; | |
d77f260f | 5199 | |
1b716045 | 5200 | if (gfc_current_ns->parent != NULL |
5201 | && gfc_current_ns->parent->proc_name | |
d77f260f | 5202 | && !module_procedure) |
1b716045 | 5203 | { |
5204 | gfc_error("ENTRY statement at %C cannot appear in a " | |
5205 | "contained procedure"); | |
5206 | return MATCH_ERROR; | |
5207 | } | |
5208 | ||
d77f260f | 5209 | /* Module function entries need special care in get_proc_name |
5210 | because previous references within the function will have | |
5211 | created symbols attached to the current namespace. */ | |
5212 | if (get_proc_name (name, &entry, | |
5213 | gfc_current_ns->parent != NULL | |
c1e4695a | 5214 | && module_procedure)) |
4ee9c684 | 5215 | return MATCH_ERROR; |
5216 | ||
1b716045 | 5217 | proc = gfc_current_block (); |
5218 | ||
86f0974b | 5219 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
5220 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
5221 | not allowed for procedures. */ | |
5222 | if (entry->attr.is_bind_c == 1) | |
5223 | { | |
5224 | entry->attr.is_bind_c = 0; | |
5225 | if (entry->old_symbol != NULL) | |
5226 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5227 | "variables or common blocks", | |
5228 | &(entry->old_symbol->declared_at)); | |
5229 | else | |
5230 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5231 | "variables or common blocks", &gfc_current_locus); | |
5232 | } | |
5233 | ||
5234 | /* Check what next non-whitespace character is so we can tell if there | |
5235 | is the required parens if we have a BIND(C). */ | |
5236 | gfc_gobble_whitespace (); | |
e0be6f02 | 5237 | peek_char = gfc_peek_ascii_char (); |
86f0974b | 5238 | |
1b716045 | 5239 | if (state == COMP_SUBROUTINE) |
4ee9c684 | 5240 | { |
950683ed | 5241 | /* An entry in a subroutine. */ |
8cafc742 | 5242 | if (!gfc_current_ns->parent && !add_global_entry (name, 1)) |
858f9894 | 5243 | return MATCH_ERROR; |
5244 | ||
4ee9c684 | 5245 | m = gfc_match_formal_arglist (entry, 0, 1); |
5246 | if (m != MATCH_YES) | |
5247 | return MATCH_ERROR; | |
5248 | ||
75ae7f6c | 5249 | /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can |
5250 | never be an internal procedure. */ | |
5251 | is_bind_c = gfc_match_bind_c (entry, true); | |
86f0974b | 5252 | if (is_bind_c == MATCH_ERROR) |
5253 | return MATCH_ERROR; | |
5254 | if (is_bind_c == MATCH_YES) | |
5255 | { | |
5256 | if (peek_char != '(') | |
5257 | { | |
5258 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
5259 | return MATCH_ERROR; | |
5260 | } | |
5261 | if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1) | |
5262 | == FAILURE) | |
5263 | return MATCH_ERROR; | |
5264 | } | |
5265 | ||
950683ed | 5266 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
5267 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 5268 | return MATCH_ERROR; |
1b716045 | 5269 | } |
5270 | else | |
5271 | { | |
7b5e1acc | 5272 | /* An entry in a function. |
1a9745d2 | 5273 | We need to take special care because writing |
5274 | ENTRY f() | |
5275 | as | |
5276 | ENTRY f | |
5277 | is allowed, whereas | |
5278 | ENTRY f() RESULT (r) | |
5279 | can't be written as | |
5280 | ENTRY f RESULT (r). */ | |
8cafc742 | 5281 | if (!gfc_current_ns->parent && !add_global_entry (name, 0)) |
858f9894 | 5282 | return MATCH_ERROR; |
5283 | ||
7b5e1acc | 5284 | old_loc = gfc_current_locus; |
5285 | if (gfc_match_eos () == MATCH_YES) | |
5286 | { | |
5287 | gfc_current_locus = old_loc; | |
5288 | /* Match the empty argument list, and add the interface to | |
5289 | the symbol. */ | |
5290 | m = gfc_match_formal_arglist (entry, 0, 1); | |
5291 | } | |
5292 | else | |
5293 | m = gfc_match_formal_arglist (entry, 0, 0); | |
5294 | ||
4ee9c684 | 5295 | if (m != MATCH_YES) |
5296 | return MATCH_ERROR; | |
5297 | ||
4ee9c684 | 5298 | result = NULL; |
5299 | ||
5300 | if (gfc_match_eos () == MATCH_YES) | |
5301 | { | |
950683ed | 5302 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
5303 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 5304 | return MATCH_ERROR; |
5305 | ||
c6871095 | 5306 | entry->result = entry; |
4ee9c684 | 5307 | } |
5308 | else | |
5309 | { | |
86f0974b | 5310 | m = gfc_match_suffix (entry, &result); |
4ee9c684 | 5311 | if (m == MATCH_NO) |
5312 | gfc_syntax_error (ST_ENTRY); | |
5313 | if (m != MATCH_YES) | |
5314 | return MATCH_ERROR; | |
5315 | ||
86f0974b | 5316 | if (result) |
5317 | { | |
5318 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE | |
5319 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
5320 | || gfc_add_function (&entry->attr, result->name, NULL) | |
5321 | == FAILURE) | |
5322 | return MATCH_ERROR; | |
5323 | entry->result = result; | |
5324 | } | |
5325 | else | |
5326 | { | |
5327 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE | |
5328 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
5329 | return MATCH_ERROR; | |
5330 | entry->result = entry; | |
5331 | } | |
4ee9c684 | 5332 | } |
4ee9c684 | 5333 | } |
5334 | ||
5335 | if (gfc_match_eos () != MATCH_YES) | |
5336 | { | |
5337 | gfc_syntax_error (ST_ENTRY); | |
5338 | return MATCH_ERROR; | |
5339 | } | |
5340 | ||
1b716045 | 5341 | entry->attr.recursive = proc->attr.recursive; |
5342 | entry->attr.elemental = proc->attr.elemental; | |
5343 | entry->attr.pure = proc->attr.pure; | |
4ee9c684 | 5344 | |
1b716045 | 5345 | el = gfc_get_entry_list (); |
5346 | el->sym = entry; | |
5347 | el->next = gfc_current_ns->entries; | |
5348 | gfc_current_ns->entries = el; | |
5349 | if (el->next) | |
5350 | el->id = el->next->id + 1; | |
5351 | else | |
5352 | el->id = 1; | |
4ee9c684 | 5353 | |
1b716045 | 5354 | new_st.op = EXEC_ENTRY; |
5355 | new_st.ext.entry = el; | |
5356 | ||
5357 | return MATCH_YES; | |
4ee9c684 | 5358 | } |
5359 | ||
5360 | ||
5361 | /* Match a subroutine statement, including optional prefixes. */ | |
5362 | ||
5363 | match | |
5364 | gfc_match_subroutine (void) | |
5365 | { | |
5366 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5367 | gfc_symbol *sym; | |
5368 | match m; | |
c5d33754 | 5369 | match is_bind_c; |
5370 | char peek_char; | |
75ae7f6c | 5371 | bool allow_binding_name; |
4ee9c684 | 5372 | |
5373 | if (gfc_current_state () != COMP_NONE | |
5374 | && gfc_current_state () != COMP_INTERFACE | |
5375 | && gfc_current_state () != COMP_CONTAINS) | |
5376 | return MATCH_NO; | |
5377 | ||
077932f9 | 5378 | m = gfc_match_prefix (NULL); |
4ee9c684 | 5379 | if (m != MATCH_YES) |
5380 | return m; | |
5381 | ||
5382 | m = gfc_match ("subroutine% %n", name); | |
5383 | if (m != MATCH_YES) | |
5384 | return m; | |
5385 | ||
d77f260f | 5386 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 5387 | return MATCH_ERROR; |
1e057e9b | 5388 | |
22c1d301 | 5389 | /* Set declared_at as it might point to, e.g., a PUBLIC statement, if |
5390 | the symbol existed before. */ | |
5391 | sym->declared_at = gfc_current_locus; | |
5392 | ||
1e057e9b | 5393 | if (add_hidden_procptr_result (sym) == SUCCESS) |
5394 | sym = sym->result; | |
5395 | ||
4ee9c684 | 5396 | gfc_new_block = sym; |
5397 | ||
c5d33754 | 5398 | /* Check what next non-whitespace character is so we can tell if there |
86f0974b | 5399 | is the required parens if we have a BIND(C). */ |
c5d33754 | 5400 | gfc_gobble_whitespace (); |
e0be6f02 | 5401 | peek_char = gfc_peek_ascii_char (); |
c5d33754 | 5402 | |
950683ed | 5403 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
4ee9c684 | 5404 | return MATCH_ERROR; |
5405 | ||
5406 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
5407 | return MATCH_ERROR; | |
5408 | ||
c5d33754 | 5409 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
5410 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
5411 | not allowed for procedures. */ | |
5412 | if (sym->attr.is_bind_c == 1) | |
5413 | { | |
5414 | sym->attr.is_bind_c = 0; | |
5415 | if (sym->old_symbol != NULL) | |
5416 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5417 | "variables or common blocks", | |
5418 | &(sym->old_symbol->declared_at)); | |
5419 | else | |
5420 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5421 | "variables or common blocks", &gfc_current_locus); | |
5422 | } | |
75ae7f6c | 5423 | |
5424 | /* C binding names are not allowed for internal procedures. */ | |
5425 | if (gfc_current_state () == COMP_CONTAINS | |
5426 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
5427 | allow_binding_name = false; | |
5428 | else | |
5429 | allow_binding_name = true; | |
5430 | ||
c5d33754 | 5431 | /* Here, we are just checking if it has the bind(c) attribute, and if |
5432 | so, then we need to make sure it's all correct. If it doesn't, | |
5433 | we still need to continue matching the rest of the subroutine line. */ | |
75ae7f6c | 5434 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 5435 | if (is_bind_c == MATCH_ERROR) |
5436 | { | |
5437 | /* There was an attempt at the bind(c), but it was wrong. An | |
5438 | error message should have been printed w/in the gfc_match_bind_c | |
5439 | so here we'll just return the MATCH_ERROR. */ | |
5440 | return MATCH_ERROR; | |
5441 | } | |
5442 | ||
5443 | if (is_bind_c == MATCH_YES) | |
5444 | { | |
75ae7f6c | 5445 | /* The following is allowed in the Fortran 2008 draft. */ |
4518e961 | 5446 | if (gfc_current_state () == COMP_CONTAINS |
75ae7f6c | 5447 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
2dcae6c7 | 5448 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
5449 | "at %L may not be specified for an internal " | |
5450 | "procedure", &gfc_current_locus) | |
75ae7f6c | 5451 | == FAILURE) |
5452 | return MATCH_ERROR; | |
5453 | ||
c5d33754 | 5454 | if (peek_char != '(') |
5455 | { | |
5456 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
5457 | return MATCH_ERROR; | |
5458 | } | |
5459 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) | |
5460 | == FAILURE) | |
5461 | return MATCH_ERROR; | |
5462 | } | |
5463 | ||
4ee9c684 | 5464 | if (gfc_match_eos () != MATCH_YES) |
5465 | { | |
5466 | gfc_syntax_error (ST_SUBROUTINE); | |
5467 | return MATCH_ERROR; | |
5468 | } | |
5469 | ||
5470 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
5471 | return MATCH_ERROR; | |
5472 | ||
a34926ba | 5473 | /* Warn if it has the same name as an intrinsic. */ |
5474 | warn_intrinsic_shadow (sym, false); | |
5475 | ||
4ee9c684 | 5476 | return MATCH_YES; |
5477 | } | |
5478 | ||
5479 | ||
c5d33754 | 5480 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
5481 | given, and set the binding label in either the given symbol (if not | |
a0527218 | 5482 | NULL), or in the current_ts. The symbol may be NULL because we may |
c5d33754 | 5483 | encounter the BIND(C) before the declaration itself. Return |
5484 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, | |
5485 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, | |
5486 | or MATCH_YES if the specifier was correct and the binding label and | |
5487 | bind(c) fields were set correctly for the given symbol or the | |
75ae7f6c | 5488 | current_ts. If allow_binding_name is false, no binding name may be |
5489 | given. */ | |
c5d33754 | 5490 | |
5491 | match | |
75ae7f6c | 5492 | gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name) |
c5d33754 | 5493 | { |
5494 | /* binding label, if exists */ | |
5495 | char binding_label[GFC_MAX_SYMBOL_LEN + 1]; | |
5496 | match double_quote; | |
5497 | match single_quote; | |
c5d33754 | 5498 | |
5499 | /* Initialize the flag that specifies whether we encountered a NAME= | |
5500 | specifier or not. */ | |
5501 | has_name_equals = 0; | |
5502 | ||
5503 | /* Init the first char to nil so we can catch if we don't have | |
5504 | the label (name attr) or the symbol name yet. */ | |
5505 | binding_label[0] = '\0'; | |
5506 | ||
5507 | /* This much we have to be able to match, in this order, if | |
5508 | there is a bind(c) label. */ | |
5509 | if (gfc_match (" bind ( c ") != MATCH_YES) | |
5510 | return MATCH_NO; | |
5511 | ||
5512 | /* Now see if there is a binding label, or if we've reached the | |
5513 | end of the bind(c) attribute without one. */ | |
5514 | if (gfc_match_char (',') == MATCH_YES) | |
5515 | { | |
5516 | if (gfc_match (" name = ") != MATCH_YES) | |
5517 | { | |
5518 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5519 | "at %C"); | |
5520 | /* should give an error message here */ | |
5521 | return MATCH_ERROR; | |
5522 | } | |
5523 | ||
5524 | has_name_equals = 1; | |
5525 | ||
5526 | /* Get the opening quote. */ | |
5527 | double_quote = MATCH_YES; | |
5528 | single_quote = MATCH_YES; | |
5529 | double_quote = gfc_match_char ('"'); | |
5530 | if (double_quote != MATCH_YES) | |
5531 | single_quote = gfc_match_char ('\''); | |
5532 | if (double_quote != MATCH_YES && single_quote != MATCH_YES) | |
5533 | { | |
5534 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5535 | "at %C"); | |
5536 | return MATCH_ERROR; | |
5537 | } | |
5538 | ||
5539 | /* Grab the binding label, using functions that will not lower | |
5540 | case the names automatically. */ | |
5541 | if (gfc_match_name_C (binding_label) != MATCH_YES) | |
5542 | return MATCH_ERROR; | |
5543 | ||
5544 | /* Get the closing quotation. */ | |
5545 | if (double_quote == MATCH_YES) | |
5546 | { | |
5547 | if (gfc_match_char ('"') != MATCH_YES) | |
5548 | { | |
5549 | gfc_error ("Missing closing quote '\"' for binding label at %C"); | |
5550 | /* User started string with '"' so looked to match it. */ | |
5551 | return MATCH_ERROR; | |
5552 | } | |
5553 | } | |
5554 | else | |
5555 | { | |
5556 | if (gfc_match_char ('\'') != MATCH_YES) | |
5557 | { | |
5558 | gfc_error ("Missing closing quote '\'' for binding label at %C"); | |
5559 | /* User started string with "'" char. */ | |
5560 | return MATCH_ERROR; | |
5561 | } | |
5562 | } | |
5563 | } | |
5564 | ||
5565 | /* Get the required right paren. */ | |
5566 | if (gfc_match_char (')') != MATCH_YES) | |
5567 | { | |
5568 | gfc_error ("Missing closing paren for binding label at %C"); | |
5569 | return MATCH_ERROR; | |
5570 | } | |
5571 | ||
75ae7f6c | 5572 | if (has_name_equals && !allow_binding_name) |
5573 | { | |
5574 | gfc_error ("No binding name is allowed in BIND(C) at %C"); | |
5575 | return MATCH_ERROR; | |
5576 | } | |
5577 | ||
5578 | if (has_name_equals && sym != NULL && sym->attr.dummy) | |
5579 | { | |
5580 | gfc_error ("For dummy procedure %s, no binding name is " | |
5581 | "allowed in BIND(C) at %C", sym->name); | |
5582 | return MATCH_ERROR; | |
5583 | } | |
5584 | ||
5585 | ||
c5d33754 | 5586 | /* Save the binding label to the symbol. If sym is null, we're |
5587 | probably matching the typespec attributes of a declaration and | |
5588 | haven't gotten the name yet, and therefore, no symbol yet. */ | |
5589 | if (binding_label[0] != '\0') | |
5590 | { | |
5591 | if (sym != NULL) | |
5592 | { | |
b1223b39 | 5593 | strcpy (sym->binding_label, binding_label); |
c5d33754 | 5594 | } |
5595 | else | |
b1223b39 | 5596 | strcpy (curr_binding_label, binding_label); |
c5d33754 | 5597 | } |
75ae7f6c | 5598 | else if (allow_binding_name) |
c5d33754 | 5599 | { |
5600 | /* No binding label, but if symbol isn't null, we | |
75ae7f6c | 5601 | can set the label for it here. |
5602 | If name="" or allow_binding_name is false, no C binding name is | |
5603 | created. */ | |
c5d33754 | 5604 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) |
5605 | strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1); | |
5606 | } | |
94fa7146 | 5607 | |
5cf92482 | 5608 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
5609 | && current_interface.type == INTERFACE_ABSTRACT) | |
94fa7146 | 5610 | { |
5611 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); | |
5612 | return MATCH_ERROR; | |
5613 | } | |
5614 | ||
c5d33754 | 5615 | return MATCH_YES; |
5616 | } | |
5617 | ||
5618 | ||
231e961a | 5619 | /* Return nonzero if we're currently compiling a contained procedure. */ |
c0985832 | 5620 | |
5621 | static int | |
5622 | contained_procedure (void) | |
5623 | { | |
1c343287 | 5624 | gfc_state_data *s = gfc_state_stack; |
c0985832 | 5625 | |
1c343287 | 5626 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) |
5627 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) | |
5628 | return 1; | |
c0985832 | 5629 | |
5630 | return 0; | |
5631 | } | |
5632 | ||
e14bee04 | 5633 | /* Set the kind of each enumerator. The kind is selected such that it is |
3b6a4b41 | 5634 | interoperable with the corresponding C enumeration type, making |
5635 | sure that -fshort-enums is honored. */ | |
5636 | ||
5637 | static void | |
5638 | set_enum_kind(void) | |
5639 | { | |
5640 | enumerator_history *current_history = NULL; | |
5641 | int kind; | |
5642 | int i; | |
5643 | ||
5644 | if (max_enum == NULL || enum_history == NULL) | |
5645 | return; | |
5646 | ||
6f092e31 | 5647 | if (!flag_short_enums) |
e14bee04 | 5648 | return; |
5649 | ||
3b6a4b41 | 5650 | i = 0; |
5651 | do | |
5652 | { | |
5653 | kind = gfc_integer_kinds[i++].kind; | |
5654 | } | |
e14bee04 | 5655 | while (kind < gfc_c_int_kind |
3b6a4b41 | 5656 | && gfc_check_integer_range (max_enum->initializer->value.integer, |
5657 | kind) != ARITH_OK); | |
5658 | ||
5659 | current_history = enum_history; | |
5660 | while (current_history != NULL) | |
5661 | { | |
5662 | current_history->sym->ts.kind = kind; | |
5663 | current_history = current_history->next; | |
5664 | } | |
5665 | } | |
5666 | ||
1a9745d2 | 5667 | |
4ee9c684 | 5668 | /* Match any of the various end-block statements. Returns the type of |
6a7084d7 | 5669 | END to the caller. The END INTERFACE, END IF, END DO, END SELECT |
5670 | and END BLOCK statements cannot be replaced by a single END statement. */ | |
4ee9c684 | 5671 | |
5672 | match | |
1a9745d2 | 5673 | gfc_match_end (gfc_statement *st) |
4ee9c684 | 5674 | { |
5675 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5676 | gfc_compile_state state; | |
5677 | locus old_loc; | |
5678 | const char *block_name; | |
5679 | const char *target; | |
c0985832 | 5680 | int eos_ok; |
4ee9c684 | 5681 | match m; |
5682 | ||
cbb9e6aa | 5683 | old_loc = gfc_current_locus; |
4ee9c684 | 5684 | if (gfc_match ("end") != MATCH_YES) |
5685 | return MATCH_NO; | |
5686 | ||
5687 | state = gfc_current_state (); | |
1a9745d2 | 5688 | block_name = gfc_current_block () == NULL |
5689 | ? NULL : gfc_current_block ()->name; | |
4ee9c684 | 5690 | |
d18a512a | 5691 | switch (state) |
4ee9c684 | 5692 | { |
d18a512a | 5693 | case COMP_ASSOCIATE: |
5694 | case COMP_BLOCK: | |
5695 | if (!strcmp (block_name, "block@")) | |
5696 | block_name = NULL; | |
5697 | break; | |
5698 | ||
5699 | case COMP_CONTAINS: | |
5700 | case COMP_DERIVED_CONTAINS: | |
4ee9c684 | 5701 | state = gfc_state_stack->previous->state; |
1a9745d2 | 5702 | block_name = gfc_state_stack->previous->sym == NULL |
5703 | ? NULL : gfc_state_stack->previous->sym->name; | |
d18a512a | 5704 | break; |
5705 | ||
5706 | default: | |
5707 | break; | |
4ee9c684 | 5708 | } |
5709 | ||
5710 | switch (state) | |
5711 | { | |
5712 | case COMP_NONE: | |
5713 | case COMP_PROGRAM: | |
5714 | *st = ST_END_PROGRAM; | |
5715 | target = " program"; | |
c0985832 | 5716 | eos_ok = 1; |
4ee9c684 | 5717 | break; |
5718 | ||
5719 | case COMP_SUBROUTINE: | |
5720 | *st = ST_END_SUBROUTINE; | |
5721 | target = " subroutine"; | |
c0985832 | 5722 | eos_ok = !contained_procedure (); |
4ee9c684 | 5723 | break; |
5724 | ||
5725 | case COMP_FUNCTION: | |
5726 | *st = ST_END_FUNCTION; | |
5727 | target = " function"; | |
c0985832 | 5728 | eos_ok = !contained_procedure (); |
4ee9c684 | 5729 | break; |
5730 | ||
5731 | case COMP_BLOCK_DATA: | |
5732 | *st = ST_END_BLOCK_DATA; | |
5733 | target = " block data"; | |
c0985832 | 5734 | eos_ok = 1; |
4ee9c684 | 5735 | break; |
5736 | ||
5737 | case COMP_MODULE: | |
5738 | *st = ST_END_MODULE; | |
5739 | target = " module"; | |
c0985832 | 5740 | eos_ok = 1; |
4ee9c684 | 5741 | break; |
5742 | ||
5743 | case COMP_INTERFACE: | |
5744 | *st = ST_END_INTERFACE; | |
5745 | target = " interface"; | |
c0985832 | 5746 | eos_ok = 0; |
4ee9c684 | 5747 | break; |
5748 | ||
5749 | case COMP_DERIVED: | |
7fd88f6e | 5750 | case COMP_DERIVED_CONTAINS: |
4ee9c684 | 5751 | *st = ST_END_TYPE; |
5752 | target = " type"; | |
c0985832 | 5753 | eos_ok = 0; |
4ee9c684 | 5754 | break; |
5755 | ||
d18a512a | 5756 | case COMP_ASSOCIATE: |
5757 | *st = ST_END_ASSOCIATE; | |
5758 | target = " associate"; | |
5759 | eos_ok = 0; | |
5760 | break; | |
5761 | ||
6a7084d7 | 5762 | case COMP_BLOCK: |
5763 | *st = ST_END_BLOCK; | |
5764 | target = " block"; | |
5765 | eos_ok = 0; | |
5766 | break; | |
5767 | ||
4ee9c684 | 5768 | case COMP_IF: |
5769 | *st = ST_ENDIF; | |
5770 | target = " if"; | |
c0985832 | 5771 | eos_ok = 0; |
4ee9c684 | 5772 | break; |
5773 | ||
5774 | case COMP_DO: | |
5775 | *st = ST_ENDDO; | |
5776 | target = " do"; | |
c0985832 | 5777 | eos_ok = 0; |
4ee9c684 | 5778 | break; |
5779 | ||
c6cd3066 | 5780 | case COMP_CRITICAL: |
5781 | *st = ST_END_CRITICAL; | |
5782 | target = " critical"; | |
5783 | eos_ok = 0; | |
5784 | break; | |
5785 | ||
4ee9c684 | 5786 | case COMP_SELECT: |
1de1b1a9 | 5787 | case COMP_SELECT_TYPE: |
4ee9c684 | 5788 | *st = ST_END_SELECT; |
5789 | target = " select"; | |
c0985832 | 5790 | eos_ok = 0; |
4ee9c684 | 5791 | break; |
5792 | ||
5793 | case COMP_FORALL: | |
5794 | *st = ST_END_FORALL; | |
5795 | target = " forall"; | |
c0985832 | 5796 | eos_ok = 0; |
4ee9c684 | 5797 | break; |
5798 | ||
5799 | case COMP_WHERE: | |
5800 | *st = ST_END_WHERE; | |
5801 | target = " where"; | |
c0985832 | 5802 | eos_ok = 0; |
4ee9c684 | 5803 | break; |
5804 | ||
3b6a4b41 | 5805 | case COMP_ENUM: |
5806 | *st = ST_END_ENUM; | |
5807 | target = " enum"; | |
5808 | eos_ok = 0; | |
5809 | last_initializer = NULL; | |
5810 | set_enum_kind (); | |
5811 | gfc_free_enum_history (); | |
5812 | break; | |
5813 | ||
4ee9c684 | 5814 | default: |
5815 | gfc_error ("Unexpected END statement at %C"); | |
5816 | goto cleanup; | |
5817 | } | |
5818 | ||
5819 | if (gfc_match_eos () == MATCH_YES) | |
5820 | { | |
4b20e9cf | 5821 | if (!eos_ok && (*st == ST_END_SUBROUTINE || *st == ST_END_FUNCTION)) |
5822 | { | |
5823 | if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: END statement " | |
5824 | "instead of %s statement at %L", | |
5825 | gfc_ascii_statement (*st), &old_loc) == FAILURE) | |
5826 | goto cleanup; | |
5827 | } | |
5828 | else if (!eos_ok) | |
4ee9c684 | 5829 | { |
f6d0e37a | 5830 | /* We would have required END [something]. */ |
d197c9ee | 5831 | gfc_error ("%s statement expected at %L", |
5832 | gfc_ascii_statement (*st), &old_loc); | |
4ee9c684 | 5833 | goto cleanup; |
5834 | } | |
5835 | ||
5836 | return MATCH_YES; | |
5837 | } | |
5838 | ||
5839 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
5840 | if (gfc_match (target) != MATCH_YES) | |
5841 | { | |
5842 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
5843 | goto cleanup; | |
5844 | } | |
5845 | ||
5846 | /* If we're at the end, make sure a block name wasn't required. */ | |
5847 | if (gfc_match_eos () == MATCH_YES) | |
5848 | { | |
5849 | ||
0d0ce415 | 5850 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT |
c6cd3066 | 5851 | && *st != ST_END_FORALL && *st != ST_END_WHERE && *st != ST_END_BLOCK |
d18a512a | 5852 | && *st != ST_END_ASSOCIATE && *st != ST_END_CRITICAL) |
4ee9c684 | 5853 | return MATCH_YES; |
5854 | ||
6a7084d7 | 5855 | if (!block_name) |
4ee9c684 | 5856 | return MATCH_YES; |
5857 | ||
5858 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
5859 | block_name, gfc_ascii_statement (*st)); | |
5860 | ||
5861 | return MATCH_ERROR; | |
5862 | } | |
5863 | ||
5864 | /* END INTERFACE has a special handler for its several possible endings. */ | |
5865 | if (*st == ST_END_INTERFACE) | |
5866 | return gfc_match_end_interface (); | |
5867 | ||
f6d0e37a | 5868 | /* We haven't hit the end of statement, so what is left must be an |
5869 | end-name. */ | |
4ee9c684 | 5870 | m = gfc_match_space (); |
5871 | if (m == MATCH_YES) | |
5872 | m = gfc_match_name (name); | |
5873 | ||
5874 | if (m == MATCH_NO) | |
5875 | gfc_error ("Expected terminating name at %C"); | |
5876 | if (m != MATCH_YES) | |
5877 | goto cleanup; | |
5878 | ||
5879 | if (block_name == NULL) | |
5880 | goto syntax; | |
5881 | ||
1e057e9b | 5882 | if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0) |
4ee9c684 | 5883 | { |
5884 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
5885 | gfc_ascii_statement (*st)); | |
5886 | goto cleanup; | |
5887 | } | |
1e057e9b | 5888 | /* Procedure pointer as function result. */ |
5889 | else if (strcmp (block_name, "ppr@") == 0 | |
5890 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0) | |
5891 | { | |
5892 | gfc_error ("Expected label '%s' for %s statement at %C", | |
5893 | gfc_current_block ()->ns->proc_name->name, | |
5894 | gfc_ascii_statement (*st)); | |
5895 | goto cleanup; | |
5896 | } | |
4ee9c684 | 5897 | |
5898 | if (gfc_match_eos () == MATCH_YES) | |
5899 | return MATCH_YES; | |
5900 | ||
5901 | syntax: | |
5902 | gfc_syntax_error (*st); | |
5903 | ||
5904 | cleanup: | |
cbb9e6aa | 5905 | gfc_current_locus = old_loc; |
4ee9c684 | 5906 | return MATCH_ERROR; |
5907 | } | |
5908 | ||
5909 | ||
5910 | ||
5911 | /***************** Attribute declaration statements ****************/ | |
5912 | ||
5913 | /* Set the attribute of a single variable. */ | |
5914 | ||
5915 | static match | |
5916 | attr_decl1 (void) | |
5917 | { | |
5918 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5919 | gfc_array_spec *as; | |
5920 | gfc_symbol *sym; | |
5921 | locus var_locus; | |
5922 | match m; | |
5923 | ||
5924 | as = NULL; | |
5925 | ||
5926 | m = gfc_match_name (name); | |
5927 | if (m != MATCH_YES) | |
5928 | goto cleanup; | |
5929 | ||
36b0a1b0 | 5930 | if (find_special (name, &sym, false)) |
4ee9c684 | 5931 | return MATCH_ERROR; |
5932 | ||
cbb9e6aa | 5933 | var_locus = gfc_current_locus; |
4ee9c684 | 5934 | |
5935 | /* Deal with possible array specification for certain attributes. */ | |
5936 | if (current_attr.dimension | |
aff518b0 | 5937 | || current_attr.codimension |
4ee9c684 | 5938 | || current_attr.allocatable |
5939 | || current_attr.pointer | |
5940 | || current_attr.target) | |
5941 | { | |
aff518b0 | 5942 | m = gfc_match_array_spec (&as, !current_attr.codimension, |
5943 | !current_attr.dimension | |
5944 | && !current_attr.pointer | |
5945 | && !current_attr.target); | |
4ee9c684 | 5946 | if (m == MATCH_ERROR) |
5947 | goto cleanup; | |
5948 | ||
5949 | if (current_attr.dimension && m == MATCH_NO) | |
5950 | { | |
1a9745d2 | 5951 | gfc_error ("Missing array specification at %L in DIMENSION " |
5952 | "statement", &var_locus); | |
4ee9c684 | 5953 | m = MATCH_ERROR; |
5954 | goto cleanup; | |
5955 | } | |
5956 | ||
13aebeb0 | 5957 | if (current_attr.dimension && sym->value) |
5958 | { | |
5959 | gfc_error ("Dimensions specified for %s at %L after its " | |
5960 | "initialisation", sym->name, &var_locus); | |
5961 | m = MATCH_ERROR; | |
5962 | goto cleanup; | |
5963 | } | |
5964 | ||
aff518b0 | 5965 | if (current_attr.codimension && m == MATCH_NO) |
5966 | { | |
5967 | gfc_error ("Missing array specification at %L in CODIMENSION " | |
5968 | "statement", &var_locus); | |
5969 | m = MATCH_ERROR; | |
5970 | goto cleanup; | |
5971 | } | |
5972 | ||
4ee9c684 | 5973 | if ((current_attr.allocatable || current_attr.pointer) |
5974 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
5975 | { | |
1a9745d2 | 5976 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
4ee9c684 | 5977 | m = MATCH_ERROR; |
5978 | goto cleanup; | |
5979 | } | |
5980 | } | |
5981 | ||
b3704193 | 5982 | /* Update symbol table. DIMENSION attribute is set in |
5983 | gfc_set_array_spec(). For CLASS variables, this must be applied | |
5984 | to the first component, or '$data' field. */ | |
a33fbb6f | 5985 | if (sym->ts.type == BT_CLASS && sym->ts.u.derived->attr.is_class) |
4ee9c684 | 5986 | { |
50b4b37b | 5987 | if (gfc_copy_attr (&CLASS_DATA (sym)->attr, ¤t_attr,&var_locus) |
5988 | == FAILURE) | |
b3704193 | 5989 | { |
5990 | m = MATCH_ERROR; | |
5991 | goto cleanup; | |
5992 | } | |
b3704193 | 5993 | } |
5994 | else | |
5995 | { | |
aff518b0 | 5996 | if (current_attr.dimension == 0 && current_attr.codimension == 0 |
5997 | && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE) | |
b3704193 | 5998 | { |
5999 | m = MATCH_ERROR; | |
6000 | goto cleanup; | |
6001 | } | |
4ee9c684 | 6002 | } |
a33fbb6f | 6003 | |
6004 | if (sym->ts.type == BT_CLASS && !sym->attr.class_ok | |
6005 | && (sym->attr.class_ok = sym->attr.class_ok || current_attr.allocatable | |
6006 | || current_attr.pointer)) | |
6007 | gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as, false); | |
4ee9c684 | 6008 | |
6009 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
6010 | { | |
6011 | m = MATCH_ERROR; | |
6012 | goto cleanup; | |
6013 | } | |
e14bee04 | 6014 | |
b549d2a5 | 6015 | if (sym->attr.cray_pointee && sym->as != NULL) |
6016 | { | |
6017 | /* Fix the array spec. */ | |
6018 | m = gfc_mod_pointee_as (sym->as); | |
6019 | if (m == MATCH_ERROR) | |
6020 | goto cleanup; | |
6021 | } | |
4ee9c684 | 6022 | |
25dd7350 | 6023 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
14efb9b7 | 6024 | { |
6025 | m = MATCH_ERROR; | |
6026 | goto cleanup; | |
6027 | } | |
6028 | ||
4ee9c684 | 6029 | if ((current_attr.external || current_attr.intrinsic) |
6030 | && sym->attr.flavor != FL_PROCEDURE | |
950683ed | 6031 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
4ee9c684 | 6032 | { |
6033 | m = MATCH_ERROR; | |
6034 | goto cleanup; | |
6035 | } | |
6036 | ||
1e057e9b | 6037 | add_hidden_procptr_result (sym); |
6038 | ||
4ee9c684 | 6039 | return MATCH_YES; |
6040 | ||
6041 | cleanup: | |
6042 | gfc_free_array_spec (as); | |
6043 | return m; | |
6044 | } | |
6045 | ||
6046 | ||
6047 | /* Generic attribute declaration subroutine. Used for attributes that | |
6048 | just have a list of names. */ | |
6049 | ||
6050 | static match | |
6051 | attr_decl (void) | |
6052 | { | |
6053 | match m; | |
6054 | ||
6055 | /* Gobble the optional double colon, by simply ignoring the result | |
6056 | of gfc_match(). */ | |
6057 | gfc_match (" ::"); | |
6058 | ||
6059 | for (;;) | |
6060 | { | |
6061 | m = attr_decl1 (); | |
6062 | if (m != MATCH_YES) | |
6063 | break; | |
6064 | ||
6065 | if (gfc_match_eos () == MATCH_YES) | |
6066 | { | |
6067 | m = MATCH_YES; | |
6068 | break; | |
6069 | } | |
6070 | ||
6071 | if (gfc_match_char (',') != MATCH_YES) | |
6072 | { | |
6073 | gfc_error ("Unexpected character in variable list at %C"); | |
6074 | m = MATCH_ERROR; | |
6075 | break; | |
6076 | } | |
6077 | } | |
6078 | ||
6079 | return m; | |
6080 | } | |
6081 | ||
6082 | ||
b549d2a5 | 6083 | /* This routine matches Cray Pointer declarations of the form: |
6084 | pointer ( <pointer>, <pointee> ) | |
6085 | or | |
e14bee04 | 6086 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
6087 | The pointer, if already declared, should be an integer. Otherwise, we | |
b549d2a5 | 6088 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
6089 | be either a scalar, or an array declaration. No space is allocated for | |
e14bee04 | 6090 | the pointee. For the statement |
b549d2a5 | 6091 | pointer (ipt, ar(10)) |
6092 | any subsequent uses of ar will be translated (in C-notation) as | |
e14bee04 | 6093 | ar(i) => ((<type> *) ipt)(i) |
b7bf3f81 | 6094 | After gimplification, pointee variable will disappear in the code. */ |
b549d2a5 | 6095 | |
6096 | static match | |
6097 | cray_pointer_decl (void) | |
6098 | { | |
6099 | match m; | |
aff518b0 | 6100 | gfc_array_spec *as = NULL; |
b549d2a5 | 6101 | gfc_symbol *cptr; /* Pointer symbol. */ |
6102 | gfc_symbol *cpte; /* Pointee symbol. */ | |
6103 | locus var_locus; | |
6104 | bool done = false; | |
6105 | ||
6106 | while (!done) | |
6107 | { | |
6108 | if (gfc_match_char ('(') != MATCH_YES) | |
6109 | { | |
6110 | gfc_error ("Expected '(' at %C"); | |
e14bee04 | 6111 | return MATCH_ERROR; |
b549d2a5 | 6112 | } |
e14bee04 | 6113 | |
b549d2a5 | 6114 | /* Match pointer. */ |
6115 | var_locus = gfc_current_locus; | |
6116 | gfc_clear_attr (¤t_attr); | |
6117 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
6118 | current_ts.type = BT_INTEGER; | |
6119 | current_ts.kind = gfc_index_integer_kind; | |
6120 | ||
e14bee04 | 6121 | m = gfc_match_symbol (&cptr, 0); |
b549d2a5 | 6122 | if (m != MATCH_YES) |
6123 | { | |
6124 | gfc_error ("Expected variable name at %C"); | |
6125 | return m; | |
6126 | } | |
e14bee04 | 6127 | |
b549d2a5 | 6128 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) |
6129 | return MATCH_ERROR; | |
6130 | ||
e14bee04 | 6131 | gfc_set_sym_referenced (cptr); |
b549d2a5 | 6132 | |
6133 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
6134 | { | |
6135 | cptr->ts.type = BT_INTEGER; | |
e14bee04 | 6136 | cptr->ts.kind = gfc_index_integer_kind; |
b549d2a5 | 6137 | } |
6138 | else if (cptr->ts.type != BT_INTEGER) | |
6139 | { | |
7698a624 | 6140 | gfc_error ("Cray pointer at %C must be an integer"); |
b549d2a5 | 6141 | return MATCH_ERROR; |
6142 | } | |
6143 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
6144 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
7698a624 | 6145 | " memory addresses require %d bytes", |
1a9745d2 | 6146 | cptr->ts.kind, gfc_index_integer_kind); |
b549d2a5 | 6147 | |
6148 | if (gfc_match_char (',') != MATCH_YES) | |
6149 | { | |
6150 | gfc_error ("Expected \",\" at %C"); | |
e14bee04 | 6151 | return MATCH_ERROR; |
b549d2a5 | 6152 | } |
6153 | ||
e14bee04 | 6154 | /* Match Pointee. */ |
b549d2a5 | 6155 | var_locus = gfc_current_locus; |
6156 | gfc_clear_attr (¤t_attr); | |
6157 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
6158 | current_ts.type = BT_UNKNOWN; | |
6159 | current_ts.kind = 0; | |
6160 | ||
6161 | m = gfc_match_symbol (&cpte, 0); | |
6162 | if (m != MATCH_YES) | |
6163 | { | |
6164 | gfc_error ("Expected variable name at %C"); | |
6165 | return m; | |
6166 | } | |
e14bee04 | 6167 | |
b549d2a5 | 6168 | /* Check for an optional array spec. */ |
aff518b0 | 6169 | m = gfc_match_array_spec (&as, true, false); |
b549d2a5 | 6170 | if (m == MATCH_ERROR) |
6171 | { | |
6172 | gfc_free_array_spec (as); | |
6173 | return m; | |
6174 | } | |
6175 | else if (m == MATCH_NO) | |
6176 | { | |
6177 | gfc_free_array_spec (as); | |
6178 | as = NULL; | |
6179 | } | |
6180 | ||
6181 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
6182 | return MATCH_ERROR; | |
6183 | ||
6184 | gfc_set_sym_referenced (cpte); | |
6185 | ||
6186 | if (cpte->as == NULL) | |
6187 | { | |
6188 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
6189 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
6190 | } | |
6191 | else if (as != NULL) | |
6192 | { | |
7698a624 | 6193 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 6194 | gfc_free_array_spec (as); |
6195 | return MATCH_ERROR; | |
6196 | } | |
6197 | ||
6198 | as = NULL; | |
6199 | ||
6200 | if (cpte->as != NULL) | |
6201 | { | |
6202 | /* Fix array spec. */ | |
6203 | m = gfc_mod_pointee_as (cpte->as); | |
6204 | if (m == MATCH_ERROR) | |
6205 | return m; | |
6206 | } | |
6207 | ||
6208 | /* Point the Pointee at the Pointer. */ | |
b7bf3f81 | 6209 | cpte->cp_pointer = cptr; |
b549d2a5 | 6210 | |
6211 | if (gfc_match_char (')') != MATCH_YES) | |
6212 | { | |
6213 | gfc_error ("Expected \")\" at %C"); | |
6214 | return MATCH_ERROR; | |
6215 | } | |
6216 | m = gfc_match_char (','); | |
6217 | if (m != MATCH_YES) | |
6218 | done = true; /* Stop searching for more declarations. */ | |
6219 | ||
6220 | } | |
6221 | ||
6222 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
6223 | || gfc_match_eos () != MATCH_YES) | |
6224 | { | |
6225 | gfc_error ("Expected \",\" or end of statement at %C"); | |
6226 | return MATCH_ERROR; | |
6227 | } | |
6228 | return MATCH_YES; | |
6229 | } | |
6230 | ||
6231 | ||
4ee9c684 | 6232 | match |
6233 | gfc_match_external (void) | |
6234 | { | |
6235 | ||
6236 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 6237 | current_attr.external = 1; |
4ee9c684 | 6238 | |
6239 | return attr_decl (); | |
6240 | } | |
6241 | ||
6242 | ||
4ee9c684 | 6243 | match |
6244 | gfc_match_intent (void) | |
6245 | { | |
6246 | sym_intent intent; | |
6247 | ||
6a7084d7 | 6248 | /* This is not allowed within a BLOCK construct! */ |
6249 | if (gfc_current_state () == COMP_BLOCK) | |
6250 | { | |
6251 | gfc_error ("INTENT is not allowed inside of BLOCK at %C"); | |
6252 | return MATCH_ERROR; | |
6253 | } | |
6254 | ||
4ee9c684 | 6255 | intent = match_intent_spec (); |
6256 | if (intent == INTENT_UNKNOWN) | |
6257 | return MATCH_ERROR; | |
6258 | ||
6259 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 6260 | current_attr.intent = intent; |
4ee9c684 | 6261 | |
6262 | return attr_decl (); | |
6263 | } | |
6264 | ||
6265 | ||
6266 | match | |
6267 | gfc_match_intrinsic (void) | |
6268 | { | |
6269 | ||
6270 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 6271 | current_attr.intrinsic = 1; |
4ee9c684 | 6272 | |
6273 | return attr_decl (); | |
6274 | } | |
6275 | ||
6276 | ||
6277 | match | |
6278 | gfc_match_optional (void) | |
6279 | { | |
6a7084d7 | 6280 | /* This is not allowed within a BLOCK construct! */ |
6281 | if (gfc_current_state () == COMP_BLOCK) | |
6282 | { | |
6283 | gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C"); | |
6284 | return MATCH_ERROR; | |
6285 | } | |
4ee9c684 | 6286 | |
6287 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 6288 | current_attr.optional = 1; |
4ee9c684 | 6289 | |
6290 | return attr_decl (); | |
6291 | } | |
6292 | ||
6293 | ||
6294 | match | |
6295 | gfc_match_pointer (void) | |
6296 | { | |
b549d2a5 | 6297 | gfc_gobble_whitespace (); |
e0be6f02 | 6298 | if (gfc_peek_ascii_char () == '(') |
b549d2a5 | 6299 | { |
6300 | if (!gfc_option.flag_cray_pointer) | |
6301 | { | |
1a9745d2 | 6302 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
6303 | "flag"); | |
b549d2a5 | 6304 | return MATCH_ERROR; |
6305 | } | |
6306 | return cray_pointer_decl (); | |
6307 | } | |
6308 | else | |
6309 | { | |
6310 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 6311 | current_attr.pointer = 1; |
b549d2a5 | 6312 | |
6313 | return attr_decl (); | |
6314 | } | |
4ee9c684 | 6315 | } |
6316 | ||
6317 | ||
6318 | match | |
6319 | gfc_match_allocatable (void) | |
6320 | { | |
4ee9c684 | 6321 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 6322 | current_attr.allocatable = 1; |
4ee9c684 | 6323 | |
6324 | return attr_decl (); | |
6325 | } | |
6326 | ||
6327 | ||
aff518b0 | 6328 | match |
6329 | gfc_match_codimension (void) | |
6330 | { | |
6331 | gfc_clear_attr (¤t_attr); | |
6332 | current_attr.codimension = 1; | |
6333 | ||
6334 | return attr_decl (); | |
6335 | } | |
6336 | ||
6337 | ||
b3c3927c | 6338 | match |
6339 | gfc_match_contiguous (void) | |
6340 | { | |
6341 | if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: CONTIGUOUS statement at %C") | |
6342 | == FAILURE) | |
6343 | return MATCH_ERROR; | |
6344 | ||
6345 | gfc_clear_attr (¤t_attr); | |
6346 | current_attr.contiguous = 1; | |
6347 | ||
6348 | return attr_decl (); | |
6349 | } | |
6350 | ||
6351 | ||
4ee9c684 | 6352 | match |
6353 | gfc_match_dimension (void) | |
6354 | { | |
4ee9c684 | 6355 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 6356 | current_attr.dimension = 1; |
4ee9c684 | 6357 | |
6358 | return attr_decl (); | |
6359 | } | |
6360 | ||
6361 | ||
6362 | match | |
6363 | gfc_match_target (void) | |
6364 | { | |
4ee9c684 | 6365 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 6366 | current_attr.target = 1; |
4ee9c684 | 6367 | |
6368 | return attr_decl (); | |
6369 | } | |
6370 | ||
6371 | ||
6372 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
6373 | statement. */ | |
6374 | ||
6375 | static match | |
6376 | access_attr_decl (gfc_statement st) | |
6377 | { | |
6378 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6379 | interface_type type; | |
6380 | gfc_user_op *uop; | |
6381 | gfc_symbol *sym; | |
dcb1b019 | 6382 | gfc_intrinsic_op op; |
4ee9c684 | 6383 | match m; |
6384 | ||
6385 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6386 | goto done; | |
6387 | ||
6388 | for (;;) | |
6389 | { | |
dcb1b019 | 6390 | m = gfc_match_generic_spec (&type, name, &op); |
4ee9c684 | 6391 | if (m == MATCH_NO) |
6392 | goto syntax; | |
6393 | if (m == MATCH_ERROR) | |
6394 | return MATCH_ERROR; | |
6395 | ||
6396 | switch (type) | |
6397 | { | |
6398 | case INTERFACE_NAMELESS: | |
94fa7146 | 6399 | case INTERFACE_ABSTRACT: |
4ee9c684 | 6400 | goto syntax; |
6401 | ||
6402 | case INTERFACE_GENERIC: | |
6403 | if (gfc_get_symbol (name, NULL, &sym)) | |
6404 | goto done; | |
6405 | ||
1a9745d2 | 6406 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
6407 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
950683ed | 6408 | sym->name, NULL) == FAILURE) |
4ee9c684 | 6409 | return MATCH_ERROR; |
6410 | ||
6411 | break; | |
6412 | ||
6413 | case INTERFACE_INTRINSIC_OP: | |
dcb1b019 | 6414 | if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN) |
4ee9c684 | 6415 | { |
dcb1b019 | 6416 | gfc_current_ns->operator_access[op] = |
4ee9c684 | 6417 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; |
6418 | } | |
6419 | else | |
6420 | { | |
6421 | gfc_error ("Access specification of the %s operator at %C has " | |
dcb1b019 | 6422 | "already been specified", gfc_op2string (op)); |
4ee9c684 | 6423 | goto done; |
6424 | } | |
6425 | ||
6426 | break; | |
6427 | ||
6428 | case INTERFACE_USER_OP: | |
6429 | uop = gfc_get_uop (name); | |
6430 | ||
6431 | if (uop->access == ACCESS_UNKNOWN) | |
6432 | { | |
1a9745d2 | 6433 | uop->access = (st == ST_PUBLIC) |
6434 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
4ee9c684 | 6435 | } |
6436 | else | |
6437 | { | |
1a9745d2 | 6438 | gfc_error ("Access specification of the .%s. operator at %C " |
6439 | "has already been specified", sym->name); | |
4ee9c684 | 6440 | goto done; |
6441 | } | |
6442 | ||
6443 | break; | |
6444 | } | |
6445 | ||
6446 | if (gfc_match_char (',') == MATCH_NO) | |
6447 | break; | |
6448 | } | |
6449 | ||
6450 | if (gfc_match_eos () != MATCH_YES) | |
6451 | goto syntax; | |
6452 | return MATCH_YES; | |
6453 | ||
6454 | syntax: | |
6455 | gfc_syntax_error (st); | |
6456 | ||
6457 | done: | |
6458 | return MATCH_ERROR; | |
6459 | } | |
6460 | ||
6461 | ||
3ea52af3 | 6462 | match |
6463 | gfc_match_protected (void) | |
6464 | { | |
6465 | gfc_symbol *sym; | |
6466 | match m; | |
6467 | ||
6468 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
6469 | { | |
6470 | gfc_error ("PROTECTED at %C only allowed in specification " | |
6471 | "part of a module"); | |
6472 | return MATCH_ERROR; | |
6473 | ||
6474 | } | |
6475 | ||
1a9745d2 | 6476 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
3ea52af3 | 6477 | == FAILURE) |
6478 | return MATCH_ERROR; | |
6479 | ||
6480 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6481 | { | |
6482 | return MATCH_ERROR; | |
6483 | } | |
6484 | ||
6485 | if (gfc_match_eos () == MATCH_YES) | |
6486 | goto syntax; | |
6487 | ||
6488 | for(;;) | |
6489 | { | |
6490 | m = gfc_match_symbol (&sym, 0); | |
6491 | switch (m) | |
6492 | { | |
6493 | case MATCH_YES: | |
1a9745d2 | 6494 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
6495 | == FAILURE) | |
3ea52af3 | 6496 | return MATCH_ERROR; |
6497 | goto next_item; | |
6498 | ||
6499 | case MATCH_NO: | |
6500 | break; | |
6501 | ||
6502 | case MATCH_ERROR: | |
6503 | return MATCH_ERROR; | |
6504 | } | |
6505 | ||
6506 | next_item: | |
6507 | if (gfc_match_eos () == MATCH_YES) | |
6508 | break; | |
6509 | if (gfc_match_char (',') != MATCH_YES) | |
6510 | goto syntax; | |
6511 | } | |
6512 | ||
6513 | return MATCH_YES; | |
6514 | ||
6515 | syntax: | |
6516 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
6517 | return MATCH_ERROR; | |
6518 | } | |
6519 | ||
6520 | ||
a0527218 | 6521 | /* The PRIVATE statement is a bit weird in that it can be an attribute |
69b1505f | 6522 | declaration, but also works as a standalone statement inside of a |
4ee9c684 | 6523 | type declaration or a module. */ |
6524 | ||
6525 | match | |
1a9745d2 | 6526 | gfc_match_private (gfc_statement *st) |
4ee9c684 | 6527 | { |
6528 | ||
6529 | if (gfc_match ("private") != MATCH_YES) | |
6530 | return MATCH_NO; | |
6531 | ||
e14bee04 | 6532 | if (gfc_current_state () != COMP_MODULE |
7fd88f6e | 6533 | && !(gfc_current_state () == COMP_DERIVED |
6534 | && gfc_state_stack->previous | |
6535 | && gfc_state_stack->previous->state == COMP_MODULE) | |
6536 | && !(gfc_current_state () == COMP_DERIVED_CONTAINS | |
6537 | && gfc_state_stack->previous && gfc_state_stack->previous->previous | |
6538 | && gfc_state_stack->previous->previous->state == COMP_MODULE)) | |
e14bee04 | 6539 | { |
6540 | gfc_error ("PRIVATE statement at %C is only allowed in the " | |
6541 | "specification part of a module"); | |
6542 | return MATCH_ERROR; | |
6543 | } | |
6544 | ||
4ee9c684 | 6545 | if (gfc_current_state () == COMP_DERIVED) |
6546 | { | |
6547 | if (gfc_match_eos () == MATCH_YES) | |
6548 | { | |
6549 | *st = ST_PRIVATE; | |
6550 | return MATCH_YES; | |
6551 | } | |
6552 | ||
6553 | gfc_syntax_error (ST_PRIVATE); | |
6554 | return MATCH_ERROR; | |
6555 | } | |
6556 | ||
6557 | if (gfc_match_eos () == MATCH_YES) | |
6558 | { | |
6559 | *st = ST_PRIVATE; | |
6560 | return MATCH_YES; | |
6561 | } | |
6562 | ||
6563 | *st = ST_ATTR_DECL; | |
6564 | return access_attr_decl (ST_PRIVATE); | |
6565 | } | |
6566 | ||
6567 | ||
6568 | match | |
1a9745d2 | 6569 | gfc_match_public (gfc_statement *st) |
4ee9c684 | 6570 | { |
6571 | ||
6572 | if (gfc_match ("public") != MATCH_YES) | |
6573 | return MATCH_NO; | |
6574 | ||
e14bee04 | 6575 | if (gfc_current_state () != COMP_MODULE) |
6576 | { | |
6577 | gfc_error ("PUBLIC statement at %C is only allowed in the " | |
6578 | "specification part of a module"); | |
6579 | return MATCH_ERROR; | |
6580 | } | |
6581 | ||
4ee9c684 | 6582 | if (gfc_match_eos () == MATCH_YES) |
6583 | { | |
6584 | *st = ST_PUBLIC; | |
6585 | return MATCH_YES; | |
6586 | } | |
6587 | ||
6588 | *st = ST_ATTR_DECL; | |
6589 | return access_attr_decl (ST_PUBLIC); | |
6590 | } | |
6591 | ||
6592 | ||
6593 | /* Workhorse for gfc_match_parameter. */ | |
6594 | ||
6595 | static match | |
6596 | do_parm (void) | |
6597 | { | |
6598 | gfc_symbol *sym; | |
6599 | gfc_expr *init; | |
6600 | match m; | |
f16404e3 | 6601 | gfc_try t; |
4ee9c684 | 6602 | |
6603 | m = gfc_match_symbol (&sym, 0); | |
6604 | if (m == MATCH_NO) | |
6605 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
6606 | ||
6607 | if (m != MATCH_YES) | |
6608 | return m; | |
6609 | ||
6610 | if (gfc_match_char ('=') == MATCH_NO) | |
6611 | { | |
6612 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
6613 | return MATCH_ERROR; | |
6614 | } | |
6615 | ||
6616 | m = gfc_match_init_expr (&init); | |
6617 | if (m == MATCH_NO) | |
6618 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
6619 | if (m != MATCH_YES) | |
6620 | return m; | |
6621 | ||
6622 | if (sym->ts.type == BT_UNKNOWN | |
6623 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
6624 | { | |
6625 | m = MATCH_ERROR; | |
6626 | goto cleanup; | |
6627 | } | |
6628 | ||
6629 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
950683ed | 6630 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
4ee9c684 | 6631 | { |
6632 | m = MATCH_ERROR; | |
6633 | goto cleanup; | |
6634 | } | |
6635 | ||
13aebeb0 | 6636 | if (sym->value) |
6637 | { | |
6638 | gfc_error ("Initializing already initialized variable at %C"); | |
6639 | m = MATCH_ERROR; | |
6640 | goto cleanup; | |
6641 | } | |
6642 | ||
f16404e3 | 6643 | t = add_init_expr_to_sym (sym->name, &init, &gfc_current_locus); |
6644 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
4ee9c684 | 6645 | |
6646 | cleanup: | |
6647 | gfc_free_expr (init); | |
6648 | return m; | |
6649 | } | |
6650 | ||
6651 | ||
6652 | /* Match a parameter statement, with the weird syntax that these have. */ | |
6653 | ||
6654 | match | |
6655 | gfc_match_parameter (void) | |
6656 | { | |
6657 | match m; | |
6658 | ||
6659 | if (gfc_match_char ('(') == MATCH_NO) | |
6660 | return MATCH_NO; | |
6661 | ||
6662 | for (;;) | |
6663 | { | |
6664 | m = do_parm (); | |
6665 | if (m != MATCH_YES) | |
6666 | break; | |
6667 | ||
6668 | if (gfc_match (" )%t") == MATCH_YES) | |
6669 | break; | |
6670 | ||
6671 | if (gfc_match_char (',') != MATCH_YES) | |
6672 | { | |
6673 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
6674 | m = MATCH_ERROR; | |
6675 | break; | |
6676 | } | |
6677 | } | |
6678 | ||
6679 | return m; | |
6680 | } | |
6681 | ||
6682 | ||
6683 | /* Save statements have a special syntax. */ | |
6684 | ||
6685 | match | |
6686 | gfc_match_save (void) | |
6687 | { | |
82f5ee13 | 6688 | char n[GFC_MAX_SYMBOL_LEN+1]; |
6689 | gfc_common_head *c; | |
4ee9c684 | 6690 | gfc_symbol *sym; |
6691 | match m; | |
6692 | ||
6693 | if (gfc_match_eos () == MATCH_YES) | |
6694 | { | |
6695 | if (gfc_current_ns->seen_save) | |
6696 | { | |
1a9745d2 | 6697 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
6698 | "follows previous SAVE statement") | |
76e82f95 | 6699 | == FAILURE) |
6700 | return MATCH_ERROR; | |
4ee9c684 | 6701 | } |
6702 | ||
6703 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
6704 | return MATCH_YES; | |
6705 | } | |
6706 | ||
6707 | if (gfc_current_ns->save_all) | |
6708 | { | |
1a9745d2 | 6709 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
6710 | "blanket SAVE statement") | |
76e82f95 | 6711 | == FAILURE) |
6712 | return MATCH_ERROR; | |
4ee9c684 | 6713 | } |
6714 | ||
6715 | gfc_match (" ::"); | |
6716 | ||
6717 | for (;;) | |
6718 | { | |
6719 | m = gfc_match_symbol (&sym, 0); | |
6720 | switch (m) | |
6721 | { | |
6722 | case MATCH_YES: | |
1a9745d2 | 6723 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
6724 | == FAILURE) | |
4ee9c684 | 6725 | return MATCH_ERROR; |
6726 | goto next_item; | |
6727 | ||
6728 | case MATCH_NO: | |
6729 | break; | |
6730 | ||
6731 | case MATCH_ERROR: | |
6732 | return MATCH_ERROR; | |
6733 | } | |
6734 | ||
82f5ee13 | 6735 | m = gfc_match (" / %n /", &n); |
4ee9c684 | 6736 | if (m == MATCH_ERROR) |
6737 | return MATCH_ERROR; | |
6738 | if (m == MATCH_NO) | |
6739 | goto syntax; | |
6740 | ||
403ddc45 | 6741 | c = gfc_get_common (n, 0); |
82f5ee13 | 6742 | c->saved = 1; |
6743 | ||
4ee9c684 | 6744 | gfc_current_ns->seen_save = 1; |
6745 | ||
6746 | next_item: | |
6747 | if (gfc_match_eos () == MATCH_YES) | |
6748 | break; | |
6749 | if (gfc_match_char (',') != MATCH_YES) | |
6750 | goto syntax; | |
6751 | } | |
6752 | ||
6753 | return MATCH_YES; | |
6754 | ||
6755 | syntax: | |
6756 | gfc_error ("Syntax error in SAVE statement at %C"); | |
6757 | return MATCH_ERROR; | |
6758 | } | |
6759 | ||
6760 | ||
8f6339b6 | 6761 | match |
6762 | gfc_match_value (void) | |
6763 | { | |
6764 | gfc_symbol *sym; | |
6765 | match m; | |
6766 | ||
6a7084d7 | 6767 | /* This is not allowed within a BLOCK construct! */ |
6768 | if (gfc_current_state () == COMP_BLOCK) | |
6769 | { | |
6770 | gfc_error ("VALUE is not allowed inside of BLOCK at %C"); | |
6771 | return MATCH_ERROR; | |
6772 | } | |
6773 | ||
1a9745d2 | 6774 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
8f6339b6 | 6775 | == FAILURE) |
6776 | return MATCH_ERROR; | |
6777 | ||
6778 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6779 | { | |
6780 | return MATCH_ERROR; | |
6781 | } | |
6782 | ||
6783 | if (gfc_match_eos () == MATCH_YES) | |
6784 | goto syntax; | |
6785 | ||
6786 | for(;;) | |
6787 | { | |
6788 | m = gfc_match_symbol (&sym, 0); | |
6789 | switch (m) | |
6790 | { | |
6791 | case MATCH_YES: | |
1a9745d2 | 6792 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
6793 | == FAILURE) | |
8f6339b6 | 6794 | return MATCH_ERROR; |
6795 | goto next_item; | |
6796 | ||
6797 | case MATCH_NO: | |
6798 | break; | |
6799 | ||
6800 | case MATCH_ERROR: | |
6801 | return MATCH_ERROR; | |
6802 | } | |
6803 | ||
6804 | next_item: | |
6805 | if (gfc_match_eos () == MATCH_YES) | |
6806 | break; | |
6807 | if (gfc_match_char (',') != MATCH_YES) | |
6808 | goto syntax; | |
6809 | } | |
6810 | ||
6811 | return MATCH_YES; | |
6812 | ||
6813 | syntax: | |
6814 | gfc_error ("Syntax error in VALUE statement at %C"); | |
6815 | return MATCH_ERROR; | |
6816 | } | |
6817 | ||
f6d0e37a | 6818 | |
ef814c81 | 6819 | match |
6820 | gfc_match_volatile (void) | |
6821 | { | |
6822 | gfc_symbol *sym; | |
6823 | match m; | |
6824 | ||
1a9745d2 | 6825 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
ef814c81 | 6826 | == FAILURE) |
6827 | return MATCH_ERROR; | |
6828 | ||
6829 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6830 | { | |
6831 | return MATCH_ERROR; | |
6832 | } | |
6833 | ||
6834 | if (gfc_match_eos () == MATCH_YES) | |
6835 | goto syntax; | |
6836 | ||
6837 | for(;;) | |
6838 | { | |
2f241857 | 6839 | /* VOLATILE is special because it can be added to host-associated |
aff518b0 | 6840 | symbols locally. Except for coarrays. */ |
2f241857 | 6841 | m = gfc_match_symbol (&sym, 1); |
ef814c81 | 6842 | switch (m) |
6843 | { | |
6844 | case MATCH_YES: | |
aff518b0 | 6845 | /* F2008, C560+C561. VOLATILE for host-/use-associated variable or |
6846 | for variable in a BLOCK which is defined outside of the BLOCK. */ | |
6847 | if (sym->ns != gfc_current_ns && sym->attr.codimension) | |
6848 | { | |
6849 | gfc_error ("Specifying VOLATILE for coarray variable '%s' at " | |
6850 | "%C, which is use-/host-associated", sym->name); | |
6851 | return MATCH_ERROR; | |
6852 | } | |
1a9745d2 | 6853 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
6854 | == FAILURE) | |
ef814c81 | 6855 | return MATCH_ERROR; |
6856 | goto next_item; | |
6857 | ||
6858 | case MATCH_NO: | |
6859 | break; | |
6860 | ||
6861 | case MATCH_ERROR: | |
6862 | return MATCH_ERROR; | |
6863 | } | |
6864 | ||
6865 | next_item: | |
6866 | if (gfc_match_eos () == MATCH_YES) | |
6867 | break; | |
6868 | if (gfc_match_char (',') != MATCH_YES) | |
6869 | goto syntax; | |
6870 | } | |
6871 | ||
6872 | return MATCH_YES; | |
6873 | ||
6874 | syntax: | |
6875 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
6876 | return MATCH_ERROR; | |
6877 | } | |
6878 | ||
6879 | ||
738928be | 6880 | match |
6881 | gfc_match_asynchronous (void) | |
6882 | { | |
6883 | gfc_symbol *sym; | |
6884 | match m; | |
6885 | ||
6886 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS statement at %C") | |
6887 | == FAILURE) | |
6888 | return MATCH_ERROR; | |
6889 | ||
6890 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6891 | { | |
6892 | return MATCH_ERROR; | |
6893 | } | |
6894 | ||
6895 | if (gfc_match_eos () == MATCH_YES) | |
6896 | goto syntax; | |
6897 | ||
6898 | for(;;) | |
6899 | { | |
6900 | /* ASYNCHRONOUS is special because it can be added to host-associated | |
6901 | symbols locally. */ | |
6902 | m = gfc_match_symbol (&sym, 1); | |
6903 | switch (m) | |
6904 | { | |
6905 | case MATCH_YES: | |
6906 | if (gfc_add_asynchronous (&sym->attr, sym->name, &gfc_current_locus) | |
6907 | == FAILURE) | |
6908 | return MATCH_ERROR; | |
6909 | goto next_item; | |
6910 | ||
6911 | case MATCH_NO: | |
6912 | break; | |
6913 | ||
6914 | case MATCH_ERROR: | |
6915 | return MATCH_ERROR; | |
6916 | } | |
6917 | ||
6918 | next_item: | |
6919 | if (gfc_match_eos () == MATCH_YES) | |
6920 | break; | |
6921 | if (gfc_match_char (',') != MATCH_YES) | |
6922 | goto syntax; | |
6923 | } | |
6924 | ||
6925 | return MATCH_YES; | |
6926 | ||
6927 | syntax: | |
6928 | gfc_error ("Syntax error in ASYNCHRONOUS statement at %C"); | |
6929 | return MATCH_ERROR; | |
6930 | } | |
6931 | ||
6932 | ||
4ee9c684 | 6933 | /* Match a module procedure statement. Note that we have to modify |
6934 | symbols in the parent's namespace because the current one was there | |
89d91d02 | 6935 | to receive symbols that are in an interface's formal argument list. */ |
4ee9c684 | 6936 | |
6937 | match | |
6938 | gfc_match_modproc (void) | |
6939 | { | |
6940 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6941 | gfc_symbol *sym; | |
6942 | match m; | |
63d42079 | 6943 | gfc_namespace *module_ns; |
94ce9f74 | 6944 | gfc_interface *old_interface_head, *interface; |
4ee9c684 | 6945 | |
6946 | if (gfc_state_stack->state != COMP_INTERFACE | |
6947 | || gfc_state_stack->previous == NULL | |
5cf92482 | 6948 | || current_interface.type == INTERFACE_NAMELESS |
6949 | || current_interface.type == INTERFACE_ABSTRACT) | |
4ee9c684 | 6950 | { |
1a9745d2 | 6951 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
6952 | "interface"); | |
4ee9c684 | 6953 | return MATCH_ERROR; |
6954 | } | |
6955 | ||
63d42079 | 6956 | module_ns = gfc_current_ns->parent; |
6957 | for (; module_ns; module_ns = module_ns->parent) | |
15ca3865 | 6958 | if (module_ns->proc_name->attr.flavor == FL_MODULE |
6959 | || module_ns->proc_name->attr.flavor == FL_PROGRAM | |
6960 | || (module_ns->proc_name->attr.flavor == FL_PROCEDURE | |
6961 | && !module_ns->proc_name->attr.contained)) | |
63d42079 | 6962 | break; |
6963 | ||
6964 | if (module_ns == NULL) | |
6965 | return MATCH_ERROR; | |
6966 | ||
94ce9f74 | 6967 | /* Store the current state of the interface. We will need it if we |
6968 | end up with a syntax error and need to recover. */ | |
6969 | old_interface_head = gfc_current_interface_head (); | |
6970 | ||
4ee9c684 | 6971 | for (;;) |
6972 | { | |
15ca3865 | 6973 | locus old_locus = gfc_current_locus; |
94ce9f74 | 6974 | bool last = false; |
6975 | ||
4ee9c684 | 6976 | m = gfc_match_name (name); |
6977 | if (m == MATCH_NO) | |
6978 | goto syntax; | |
6979 | if (m != MATCH_YES) | |
6980 | return MATCH_ERROR; | |
6981 | ||
94ce9f74 | 6982 | /* Check for syntax error before starting to add symbols to the |
6983 | current namespace. */ | |
6984 | if (gfc_match_eos () == MATCH_YES) | |
6985 | last = true; | |
6986 | if (!last && gfc_match_char (',') != MATCH_YES) | |
6987 | goto syntax; | |
6988 | ||
6989 | /* Now we're sure the syntax is valid, we process this item | |
6990 | further. */ | |
63d42079 | 6991 | if (gfc_get_symbol (name, module_ns, &sym)) |
4ee9c684 | 6992 | return MATCH_ERROR; |
6993 | ||
15ca3865 | 6994 | if (sym->attr.intrinsic) |
6995 | { | |
6996 | gfc_error ("Intrinsic procedure at %L cannot be a MODULE " | |
6997 | "PROCEDURE", &old_locus); | |
6998 | return MATCH_ERROR; | |
6999 | } | |
7000 | ||
4ee9c684 | 7001 | if (sym->attr.proc != PROC_MODULE |
950683ed | 7002 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
7003 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 7004 | return MATCH_ERROR; |
7005 | ||
7006 | if (gfc_add_interface (sym) == FAILURE) | |
7007 | return MATCH_ERROR; | |
7008 | ||
3186f695 | 7009 | sym->attr.mod_proc = 1; |
15ca3865 | 7010 | sym->declared_at = old_locus; |
3186f695 | 7011 | |
94ce9f74 | 7012 | if (last) |
4ee9c684 | 7013 | break; |
4ee9c684 | 7014 | } |
7015 | ||
7016 | return MATCH_YES; | |
7017 | ||
7018 | syntax: | |
94ce9f74 | 7019 | /* Restore the previous state of the interface. */ |
7020 | interface = gfc_current_interface_head (); | |
7021 | gfc_set_current_interface_head (old_interface_head); | |
7022 | ||
7023 | /* Free the new interfaces. */ | |
7024 | while (interface != old_interface_head) | |
7025 | { | |
7026 | gfc_interface *i = interface->next; | |
7027 | gfc_free (interface); | |
7028 | interface = i; | |
7029 | } | |
7030 | ||
7031 | /* And issue a syntax error. */ | |
4ee9c684 | 7032 | gfc_syntax_error (ST_MODULE_PROC); |
7033 | return MATCH_ERROR; | |
7034 | } | |
7035 | ||
7036 | ||
ea94d76d | 7037 | /* Check a derived type that is being extended. */ |
7038 | static gfc_symbol* | |
7039 | check_extended_derived_type (char *name) | |
7040 | { | |
7041 | gfc_symbol *extended; | |
7042 | ||
7043 | if (gfc_find_symbol (name, gfc_current_ns, 1, &extended)) | |
7044 | { | |
7045 | gfc_error ("Ambiguous symbol in TYPE definition at %C"); | |
7046 | return NULL; | |
7047 | } | |
7048 | ||
7049 | if (!extended) | |
7050 | { | |
7051 | gfc_error ("No such symbol in TYPE definition at %C"); | |
7052 | return NULL; | |
7053 | } | |
7054 | ||
7055 | if (extended->attr.flavor != FL_DERIVED) | |
7056 | { | |
7057 | gfc_error ("'%s' in EXTENDS expression at %C is not a " | |
7058 | "derived type", name); | |
7059 | return NULL; | |
7060 | } | |
7061 | ||
7062 | if (extended->attr.is_bind_c) | |
7063 | { | |
7064 | gfc_error ("'%s' cannot be extended at %C because it " | |
7065 | "is BIND(C)", extended->name); | |
7066 | return NULL; | |
7067 | } | |
7068 | ||
7069 | if (extended->attr.sequence) | |
7070 | { | |
7071 | gfc_error ("'%s' cannot be extended at %C because it " | |
7072 | "is a SEQUENCE type", extended->name); | |
7073 | return NULL; | |
7074 | } | |
7075 | ||
7076 | return extended; | |
7077 | } | |
7078 | ||
7079 | ||
c5d33754 | 7080 | /* Match the optional attribute specifiers for a type declaration. |
7081 | Return MATCH_ERROR if an error is encountered in one of the handled | |
7082 | attributes (public, private, bind(c)), MATCH_NO if what's found is | |
7083 | not a handled attribute, and MATCH_YES otherwise. TODO: More error | |
7084 | checking on attribute conflicts needs to be done. */ | |
4ee9c684 | 7085 | |
7086 | match | |
ea94d76d | 7087 | gfc_get_type_attr_spec (symbol_attribute *attr, char *name) |
4ee9c684 | 7088 | { |
c5d33754 | 7089 | /* See if the derived type is marked as private. */ |
4ee9c684 | 7090 | if (gfc_match (" , private") == MATCH_YES) |
7091 | { | |
e14bee04 | 7092 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 7093 | { |
e14bee04 | 7094 | gfc_error ("Derived type at %C can only be PRIVATE in the " |
7095 | "specification part of a module"); | |
4ee9c684 | 7096 | return MATCH_ERROR; |
7097 | } | |
7098 | ||
c5d33754 | 7099 | if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
4ee9c684 | 7100 | return MATCH_ERROR; |
4ee9c684 | 7101 | } |
c5d33754 | 7102 | else if (gfc_match (" , public") == MATCH_YES) |
4ee9c684 | 7103 | { |
e14bee04 | 7104 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 7105 | { |
e14bee04 | 7106 | gfc_error ("Derived type at %C can only be PUBLIC in the " |
7107 | "specification part of a module"); | |
4ee9c684 | 7108 | return MATCH_ERROR; |
7109 | } | |
7110 | ||
c5d33754 | 7111 | if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
4ee9c684 | 7112 | return MATCH_ERROR; |
4ee9c684 | 7113 | } |
ac5f2650 | 7114 | else if (gfc_match (" , bind ( c )") == MATCH_YES) |
c5d33754 | 7115 | { |
7116 | /* If the type is defined to be bind(c) it then needs to make | |
7117 | sure that all fields are interoperable. This will | |
7118 | need to be a semantic check on the finished derived type. | |
7119 | See 15.2.3 (lines 9-12) of F2003 draft. */ | |
7120 | if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) | |
7121 | return MATCH_ERROR; | |
7122 | ||
7123 | /* TODO: attr conflicts need to be checked, probably in symbol.c. */ | |
7124 | } | |
ac5f2650 | 7125 | else if (gfc_match (" , abstract") == MATCH_YES) |
7126 | { | |
7127 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C") | |
7128 | == FAILURE) | |
7129 | return MATCH_ERROR; | |
7130 | ||
7131 | if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE) | |
7132 | return MATCH_ERROR; | |
7133 | } | |
ea94d76d | 7134 | else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES) |
7135 | { | |
e485ad6b | 7136 | if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE) |
ea94d76d | 7137 | return MATCH_ERROR; |
7138 | } | |
c5d33754 | 7139 | else |
7140 | return MATCH_NO; | |
7141 | ||
7142 | /* If we get here, something matched. */ | |
7143 | return MATCH_YES; | |
7144 | } | |
7145 | ||
7146 | ||
5855d191 | 7147 | /* Assign a hash value for a derived type. The algorithm is that of |
7148 | SDBM. The hashed string is '[module_name #] derived_name'. */ | |
7149 | static unsigned int | |
7150 | hash_value (gfc_symbol *sym) | |
7151 | { | |
7152 | unsigned int hash = 0; | |
7153 | const char *c; | |
7154 | int i, len; | |
7155 | ||
7156 | /* Hash of the module or procedure name. */ | |
7157 | if (sym->module != NULL) | |
7158 | c = sym->module; | |
7159 | else if (sym->ns && sym->ns->proc_name | |
7160 | && sym->ns->proc_name->attr.flavor == FL_MODULE) | |
7161 | c = sym->ns->proc_name->name; | |
7162 | else | |
7163 | c = NULL; | |
7164 | ||
7165 | if (c) | |
7166 | { | |
7167 | len = strlen (c); | |
7168 | for (i = 0; i < len; i++, c++) | |
7169 | hash = (hash << 6) + (hash << 16) - hash + (*c); | |
7170 | ||
7171 | /* Disambiguate between 'a' in 'aa' and 'aa' in 'a'. */ | |
7172 | hash = (hash << 6) + (hash << 16) - hash + '#'; | |
7173 | } | |
7174 | ||
7175 | /* Hash of the derived type name. */ | |
7176 | len = strlen (sym->name); | |
7177 | c = sym->name; | |
7178 | for (i = 0; i < len; i++, c++) | |
7179 | hash = (hash << 6) + (hash << 16) - hash + (*c); | |
7180 | ||
7181 | /* Return the hash but take the modulus for the sake of module read, | |
7182 | even though this slightly increases the chance of collision. */ | |
7183 | return (hash % 100000000); | |
7184 | } | |
1de1b1a9 | 7185 | |
7186 | ||
c5d33754 | 7187 | /* Match the beginning of a derived type declaration. If a type name |
7188 | was the result of a function, then it is possible to have a symbol | |
7189 | already to be known as a derived type yet have no components. */ | |
7190 | ||
7191 | match | |
7192 | gfc_match_derived_decl (void) | |
7193 | { | |
7194 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
ea94d76d | 7195 | char parent[GFC_MAX_SYMBOL_LEN + 1]; |
c5d33754 | 7196 | symbol_attribute attr; |
7197 | gfc_symbol *sym; | |
ea94d76d | 7198 | gfc_symbol *extended; |
c5d33754 | 7199 | match m; |
7200 | match is_type_attr_spec = MATCH_NO; | |
33e86520 | 7201 | bool seen_attr = false; |
c5d33754 | 7202 | |
7203 | if (gfc_current_state () == COMP_DERIVED) | |
7204 | return MATCH_NO; | |
7205 | ||
ea94d76d | 7206 | name[0] = '\0'; |
7207 | parent[0] = '\0'; | |
c5d33754 | 7208 | gfc_clear_attr (&attr); |
ea94d76d | 7209 | extended = NULL; |
c5d33754 | 7210 | |
7211 | do | |
7212 | { | |
ea94d76d | 7213 | is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent); |
c5d33754 | 7214 | if (is_type_attr_spec == MATCH_ERROR) |
7215 | return MATCH_ERROR; | |
33e86520 | 7216 | if (is_type_attr_spec == MATCH_YES) |
7217 | seen_attr = true; | |
c5d33754 | 7218 | } while (is_type_attr_spec == MATCH_YES); |
4ee9c684 | 7219 | |
e485ad6b | 7220 | /* Deal with derived type extensions. The extension attribute has |
7221 | been added to 'attr' but now the parent type must be found and | |
7222 | checked. */ | |
ea94d76d | 7223 | if (parent[0]) |
7224 | extended = check_extended_derived_type (parent); | |
7225 | ||
7226 | if (parent[0] && !extended) | |
7227 | return MATCH_ERROR; | |
7228 | ||
33e86520 | 7229 | if (gfc_match (" ::") != MATCH_YES && seen_attr) |
4ee9c684 | 7230 | { |
7231 | gfc_error ("Expected :: in TYPE definition at %C"); | |
7232 | return MATCH_ERROR; | |
7233 | } | |
7234 | ||
7235 | m = gfc_match (" %n%t", name); | |
7236 | if (m != MATCH_YES) | |
7237 | return m; | |
7238 | ||
a3055431 | 7239 | /* Make sure the name is not the name of an intrinsic type. */ |
7240 | if (gfc_is_intrinsic_typename (name)) | |
4ee9c684 | 7241 | { |
1a9745d2 | 7242 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
7243 | "type", name); | |
4ee9c684 | 7244 | return MATCH_ERROR; |
7245 | } | |
7246 | ||
7247 | if (gfc_get_symbol (name, NULL, &sym)) | |
7248 | return MATCH_ERROR; | |
7249 | ||
7250 | if (sym->ts.type != BT_UNKNOWN) | |
7251 | { | |
7252 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
7253 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
7254 | return MATCH_ERROR; | |
7255 | } | |
7256 | ||
7257 | /* The symbol may already have the derived attribute without the | |
7258 | components. The ways this can happen is via a function | |
7259 | definition, an INTRINSIC statement or a subtype in another | |
7260 | derived type that is a pointer. The first part of the AND clause | |
69b1505f | 7261 | is true if the symbol is not the return value of a function. */ |
4ee9c684 | 7262 | if (sym->attr.flavor != FL_DERIVED |
950683ed | 7263 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 7264 | return MATCH_ERROR; |
7265 | ||
e6b82afc | 7266 | if (sym->components != NULL || sym->attr.zero_comp) |
4ee9c684 | 7267 | { |
1a9745d2 | 7268 | gfc_error ("Derived type definition of '%s' at %C has already been " |
7269 | "defined", sym->name); | |
4ee9c684 | 7270 | return MATCH_ERROR; |
7271 | } | |
7272 | ||
7273 | if (attr.access != ACCESS_UNKNOWN | |
950683ed | 7274 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
4ee9c684 | 7275 | return MATCH_ERROR; |
7276 | ||
c5d33754 | 7277 | /* See if the derived type was labeled as bind(c). */ |
7278 | if (attr.is_bind_c != 0) | |
7279 | sym->attr.is_bind_c = attr.is_bind_c; | |
7280 | ||
223f0f57 | 7281 | /* Construct the f2k_derived namespace if it is not yet there. */ |
7282 | if (!sym->f2k_derived) | |
7283 | sym->f2k_derived = gfc_get_namespace (NULL, 0); | |
ea94d76d | 7284 | |
7285 | if (extended && !sym->components) | |
7286 | { | |
7287 | gfc_component *p; | |
7288 | gfc_symtree *st; | |
7289 | ||
7290 | /* Add the extended derived type as the first component. */ | |
7291 | gfc_add_component (sym, parent, &p); | |
ea94d76d | 7292 | extended->refs++; |
7293 | gfc_set_sym_referenced (extended); | |
7294 | ||
7295 | p->ts.type = BT_DERIVED; | |
eeebe20b | 7296 | p->ts.u.derived = extended; |
ea94d76d | 7297 | p->initializer = gfc_default_initializer (&p->ts); |
bdfbc762 | 7298 | |
7299 | /* Set extension level. */ | |
7300 | if (extended->attr.extension == 255) | |
7301 | { | |
7302 | /* Since the extension field is 8 bit wide, we can only have | |
7303 | up to 255 extension levels. */ | |
7304 | gfc_error ("Maximum extension level reached with type '%s' at %L", | |
7305 | extended->name, &extended->declared_at); | |
7306 | return MATCH_ERROR; | |
7307 | } | |
7308 | sym->attr.extension = extended->attr.extension + 1; | |
ea94d76d | 7309 | |
7310 | /* Provide the links between the extended type and its extension. */ | |
7311 | if (!extended->f2k_derived) | |
7312 | extended->f2k_derived = gfc_get_namespace (NULL, 0); | |
7313 | st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name); | |
7314 | st->n.sym = sym; | |
7315 | } | |
7316 | ||
bdfbc762 | 7317 | if (!sym->hash_value) |
7318 | /* Set the hash for the compound name for this type. */ | |
7319 | sym->hash_value = hash_value (sym); | |
1de1b1a9 | 7320 | |
ac5f2650 | 7321 | /* Take over the ABSTRACT attribute. */ |
7322 | sym->attr.abstract = attr.abstract; | |
7323 | ||
4ee9c684 | 7324 | gfc_new_block = sym; |
7325 | ||
7326 | return MATCH_YES; | |
7327 | } | |
b549d2a5 | 7328 | |
7329 | ||
7330 | /* Cray Pointees can be declared as: | |
452695a8 | 7331 | pointer (ipt, a (n,m,...,*)) */ |
b549d2a5 | 7332 | |
8458f4ca | 7333 | match |
b549d2a5 | 7334 | gfc_mod_pointee_as (gfc_array_spec *as) |
7335 | { | |
7336 | as->cray_pointee = true; /* This will be useful to know later. */ | |
7337 | if (as->type == AS_ASSUMED_SIZE) | |
452695a8 | 7338 | as->cp_was_assumed = true; |
b549d2a5 | 7339 | else if (as->type == AS_ASSUMED_SHAPE) |
7340 | { | |
7341 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
7342 | return MATCH_ERROR; | |
7343 | } | |
7344 | return MATCH_YES; | |
7345 | } | |
3b6a4b41 | 7346 | |
7347 | ||
7348 | /* Match the enum definition statement, here we are trying to match | |
7349 | the first line of enum definition statement. | |
7350 | Returns MATCH_YES if match is found. */ | |
7351 | ||
7352 | match | |
7353 | gfc_match_enum (void) | |
7354 | { | |
7355 | match m; | |
7356 | ||
7357 | m = gfc_match_eos (); | |
7358 | if (m != MATCH_YES) | |
7359 | return m; | |
7360 | ||
60fbbf9e | 7361 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") |
3b6a4b41 | 7362 | == FAILURE) |
7363 | return MATCH_ERROR; | |
7364 | ||
7365 | return MATCH_YES; | |
7366 | } | |
7367 | ||
7368 | ||
fe1328da | 7369 | /* Returns an initializer whose value is one higher than the value of the |
7370 | LAST_INITIALIZER argument. If the argument is NULL, the | |
7371 | initializers value will be set to zero. The initializer's kind | |
7372 | will be set to gfc_c_int_kind. | |
7373 | ||
7374 | If -fshort-enums is given, the appropriate kind will be selected | |
7375 | later after all enumerators have been parsed. A warning is issued | |
7376 | here if an initializer exceeds gfc_c_int_kind. */ | |
7377 | ||
7378 | static gfc_expr * | |
7379 | enum_initializer (gfc_expr *last_initializer, locus where) | |
7380 | { | |
7381 | gfc_expr *result; | |
126387b5 | 7382 | result = gfc_get_constant_expr (BT_INTEGER, gfc_c_int_kind, &where); |
fe1328da | 7383 | |
7384 | mpz_init (result->value.integer); | |
7385 | ||
7386 | if (last_initializer != NULL) | |
7387 | { | |
7388 | mpz_add_ui (result->value.integer, last_initializer->value.integer, 1); | |
7389 | result->where = last_initializer->where; | |
7390 | ||
7391 | if (gfc_check_integer_range (result->value.integer, | |
7392 | gfc_c_int_kind) != ARITH_OK) | |
7393 | { | |
7394 | gfc_error ("Enumerator exceeds the C integer type at %C"); | |
7395 | return NULL; | |
7396 | } | |
7397 | } | |
7398 | else | |
7399 | { | |
7400 | /* Control comes here, if it's the very first enumerator and no | |
7401 | initializer has been given. It will be initialized to zero. */ | |
7402 | mpz_set_si (result->value.integer, 0); | |
7403 | } | |
7404 | ||
7405 | return result; | |
7406 | } | |
7407 | ||
7408 | ||
60fbbf9e | 7409 | /* Match a variable name with an optional initializer. When this |
7410 | subroutine is called, a variable is expected to be parsed next. | |
7411 | Depending on what is happening at the moment, updates either the | |
7412 | symbol table or the current interface. */ | |
7413 | ||
7414 | static match | |
7415 | enumerator_decl (void) | |
7416 | { | |
7417 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7418 | gfc_expr *initializer; | |
7419 | gfc_array_spec *as = NULL; | |
7420 | gfc_symbol *sym; | |
7421 | locus var_locus; | |
7422 | match m; | |
f6bb8f4b | 7423 | gfc_try t; |
60fbbf9e | 7424 | locus old_locus; |
7425 | ||
7426 | initializer = NULL; | |
7427 | old_locus = gfc_current_locus; | |
7428 | ||
7429 | /* When we get here, we've just matched a list of attributes and | |
7430 | maybe a type and a double colon. The next thing we expect to see | |
7431 | is the name of the symbol. */ | |
7432 | m = gfc_match_name (name); | |
7433 | if (m != MATCH_YES) | |
7434 | goto cleanup; | |
7435 | ||
7436 | var_locus = gfc_current_locus; | |
7437 | ||
7438 | /* OK, we've successfully matched the declaration. Now put the | |
7439 | symbol in the current namespace. If we fail to create the symbol, | |
7440 | bail out. */ | |
7441 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
7442 | { | |
7443 | m = MATCH_ERROR; | |
7444 | goto cleanup; | |
7445 | } | |
7446 | ||
7447 | /* The double colon must be present in order to have initializers. | |
7448 | Otherwise the statement is ambiguous with an assignment statement. */ | |
7449 | if (colon_seen) | |
7450 | { | |
7451 | if (gfc_match_char ('=') == MATCH_YES) | |
7452 | { | |
7453 | m = gfc_match_init_expr (&initializer); | |
7454 | if (m == MATCH_NO) | |
7455 | { | |
7456 | gfc_error ("Expected an initialization expression at %C"); | |
7457 | m = MATCH_ERROR; | |
7458 | } | |
7459 | ||
7460 | if (m != MATCH_YES) | |
7461 | goto cleanup; | |
7462 | } | |
7463 | } | |
7464 | ||
7465 | /* If we do not have an initializer, the initialization value of the | |
7466 | previous enumerator (stored in last_initializer) is incremented | |
7467 | by 1 and is used to initialize the current enumerator. */ | |
7468 | if (initializer == NULL) | |
fe1328da | 7469 | initializer = enum_initializer (last_initializer, old_locus); |
e14bee04 | 7470 | |
60fbbf9e | 7471 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
7472 | { | |
a8beb4f8 | 7473 | gfc_error ("ENUMERATOR %L not initialized with integer expression", |
7474 | &var_locus); | |
e14bee04 | 7475 | m = MATCH_ERROR; |
60fbbf9e | 7476 | goto cleanup; |
7477 | } | |
7478 | ||
7479 | /* Store this current initializer, for the next enumerator variable | |
7480 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
7481 | use last_initializer below. */ | |
7482 | last_initializer = initializer; | |
7483 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
7484 | ||
7485 | /* Maintain enumerator history. */ | |
7486 | gfc_find_symbol (name, NULL, 0, &sym); | |
7487 | create_enum_history (sym, last_initializer); | |
7488 | ||
7489 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
7490 | ||
7491 | cleanup: | |
7492 | /* Free stuff up and return. */ | |
7493 | gfc_free_expr (initializer); | |
7494 | ||
7495 | return m; | |
7496 | } | |
7497 | ||
7498 | ||
f6d0e37a | 7499 | /* Match the enumerator definition statement. */ |
3b6a4b41 | 7500 | |
7501 | match | |
7502 | gfc_match_enumerator_def (void) | |
7503 | { | |
7504 | match m; | |
f6bb8f4b | 7505 | gfc_try t; |
e14bee04 | 7506 | |
3b6a4b41 | 7507 | gfc_clear_ts (¤t_ts); |
e14bee04 | 7508 | |
3b6a4b41 | 7509 | m = gfc_match (" enumerator"); |
7510 | if (m != MATCH_YES) | |
7511 | return m; | |
60fbbf9e | 7512 | |
7513 | m = gfc_match (" :: "); | |
7514 | if (m == MATCH_ERROR) | |
7515 | return m; | |
7516 | ||
7517 | colon_seen = (m == MATCH_YES); | |
e14bee04 | 7518 | |
3b6a4b41 | 7519 | if (gfc_current_state () != COMP_ENUM) |
7520 | { | |
7521 | gfc_error ("ENUM definition statement expected before %C"); | |
7522 | gfc_free_enum_history (); | |
7523 | return MATCH_ERROR; | |
7524 | } | |
7525 | ||
7526 | (¤t_ts)->type = BT_INTEGER; | |
7527 | (¤t_ts)->kind = gfc_c_int_kind; | |
e14bee04 | 7528 | |
60fbbf9e | 7529 | gfc_clear_attr (¤t_attr); |
7530 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
7531 | if (t == FAILURE) | |
3b6a4b41 | 7532 | { |
60fbbf9e | 7533 | m = MATCH_ERROR; |
3b6a4b41 | 7534 | goto cleanup; |
7535 | } | |
7536 | ||
3b6a4b41 | 7537 | for (;;) |
7538 | { | |
60fbbf9e | 7539 | m = enumerator_decl (); |
3b6a4b41 | 7540 | if (m == MATCH_ERROR) |
a8beb4f8 | 7541 | { |
7542 | gfc_free_enum_history (); | |
7543 | goto cleanup; | |
7544 | } | |
3b6a4b41 | 7545 | if (m == MATCH_NO) |
7546 | break; | |
7547 | ||
7548 | if (gfc_match_eos () == MATCH_YES) | |
7549 | goto cleanup; | |
7550 | if (gfc_match_char (',') != MATCH_YES) | |
7551 | break; | |
7552 | } | |
7553 | ||
7554 | if (gfc_current_state () == COMP_ENUM) | |
7555 | { | |
7556 | gfc_free_enum_history (); | |
7557 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
7558 | m = MATCH_ERROR; | |
7559 | } | |
7560 | ||
7561 | cleanup: | |
7562 | gfc_free_array_spec (current_as); | |
7563 | current_as = NULL; | |
7564 | return m; | |
7565 | ||
7566 | } | |
7567 | ||
e449e4dd | 7568 | |
7fd88f6e | 7569 | /* Match binding attributes. */ |
7570 | ||
7571 | static match | |
64e93293 | 7572 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc) |
7fd88f6e | 7573 | { |
7574 | bool found_passing = false; | |
64e93293 | 7575 | bool seen_ptr = false; |
fe9b08a2 | 7576 | match m = MATCH_YES; |
7fd88f6e | 7577 | |
7578 | /* Intialize to defaults. Do so even before the MATCH_NO check so that in | |
7579 | this case the defaults are in there. */ | |
7580 | ba->access = ACCESS_UNKNOWN; | |
7581 | ba->pass_arg = NULL; | |
7582 | ba->pass_arg_num = 0; | |
7583 | ba->nopass = 0; | |
7584 | ba->non_overridable = 0; | |
61c3b81d | 7585 | ba->deferred = 0; |
fe9b08a2 | 7586 | ba->ppc = ppc; |
7fd88f6e | 7587 | |
7588 | /* If we find a comma, we believe there are binding attributes. */ | |
fe9b08a2 | 7589 | m = gfc_match_char (','); |
7590 | if (m == MATCH_NO) | |
7591 | goto done; | |
7fd88f6e | 7592 | |
7593 | do | |
7594 | { | |
e2f06a48 | 7595 | /* Access specifier. */ |
7596 | ||
7597 | m = gfc_match (" public"); | |
7fd88f6e | 7598 | if (m == MATCH_ERROR) |
7599 | goto error; | |
7600 | if (m == MATCH_YES) | |
7601 | { | |
e2f06a48 | 7602 | if (ba->access != ACCESS_UNKNOWN) |
7fd88f6e | 7603 | { |
e2f06a48 | 7604 | gfc_error ("Duplicate access-specifier at %C"); |
7fd88f6e | 7605 | goto error; |
7606 | } | |
7607 | ||
e2f06a48 | 7608 | ba->access = ACCESS_PUBLIC; |
7fd88f6e | 7609 | continue; |
7610 | } | |
7611 | ||
e2f06a48 | 7612 | m = gfc_match (" private"); |
7fd88f6e | 7613 | if (m == MATCH_ERROR) |
7614 | goto error; | |
7615 | if (m == MATCH_YES) | |
7616 | { | |
e2f06a48 | 7617 | if (ba->access != ACCESS_UNKNOWN) |
7fd88f6e | 7618 | { |
e2f06a48 | 7619 | gfc_error ("Duplicate access-specifier at %C"); |
7fd88f6e | 7620 | goto error; |
7621 | } | |
7622 | ||
e2f06a48 | 7623 | ba->access = ACCESS_PRIVATE; |
7fd88f6e | 7624 | continue; |
7625 | } | |
7626 | ||
e2f06a48 | 7627 | /* If inside GENERIC, the following is not allowed. */ |
7628 | if (!generic) | |
7fd88f6e | 7629 | { |
7fd88f6e | 7630 | |
e2f06a48 | 7631 | /* NOPASS flag. */ |
7632 | m = gfc_match (" nopass"); | |
7633 | if (m == MATCH_ERROR) | |
7634 | goto error; | |
7635 | if (m == MATCH_YES) | |
7fd88f6e | 7636 | { |
e2f06a48 | 7637 | if (found_passing) |
7638 | { | |
7639 | gfc_error ("Binding attributes already specify passing," | |
7640 | " illegal NOPASS at %C"); | |
7641 | goto error; | |
7642 | } | |
7643 | ||
7644 | found_passing = true; | |
7645 | ba->nopass = 1; | |
7646 | continue; | |
7fd88f6e | 7647 | } |
7648 | ||
e2f06a48 | 7649 | /* PASS possibly including argument. */ |
7650 | m = gfc_match (" pass"); | |
7651 | if (m == MATCH_ERROR) | |
7652 | goto error; | |
7653 | if (m == MATCH_YES) | |
7fd88f6e | 7654 | { |
e2f06a48 | 7655 | char arg[GFC_MAX_SYMBOL_LEN + 1]; |
7656 | ||
7657 | if (found_passing) | |
7658 | { | |
7659 | gfc_error ("Binding attributes already specify passing," | |
7660 | " illegal PASS at %C"); | |
7661 | goto error; | |
7662 | } | |
7663 | ||
7664 | m = gfc_match (" ( %n )", arg); | |
7665 | if (m == MATCH_ERROR) | |
7666 | goto error; | |
7667 | if (m == MATCH_YES) | |
fe9b08a2 | 7668 | ba->pass_arg = gfc_get_string (arg); |
e2f06a48 | 7669 | gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL)); |
7670 | ||
7671 | found_passing = true; | |
7672 | ba->nopass = 0; | |
7673 | continue; | |
7fd88f6e | 7674 | } |
7675 | ||
64e93293 | 7676 | if (ppc) |
7677 | { | |
7678 | /* POINTER flag. */ | |
7679 | m = gfc_match (" pointer"); | |
7680 | if (m == MATCH_ERROR) | |
7681 | goto error; | |
7682 | if (m == MATCH_YES) | |
7683 | { | |
7684 | if (seen_ptr) | |
7685 | { | |
7686 | gfc_error ("Duplicate POINTER attribute at %C"); | |
7687 | goto error; | |
7688 | } | |
7689 | ||
7690 | seen_ptr = true; | |
64e93293 | 7691 | continue; |
7692 | } | |
7693 | } | |
7694 | else | |
7695 | { | |
7696 | /* NON_OVERRIDABLE flag. */ | |
7697 | m = gfc_match (" non_overridable"); | |
7698 | if (m == MATCH_ERROR) | |
7699 | goto error; | |
7700 | if (m == MATCH_YES) | |
7701 | { | |
7702 | if (ba->non_overridable) | |
7703 | { | |
7704 | gfc_error ("Duplicate NON_OVERRIDABLE at %C"); | |
7705 | goto error; | |
7706 | } | |
7707 | ||
7708 | ba->non_overridable = 1; | |
7709 | continue; | |
7710 | } | |
7711 | ||
7712 | /* DEFERRED flag. */ | |
7713 | m = gfc_match (" deferred"); | |
7714 | if (m == MATCH_ERROR) | |
7715 | goto error; | |
7716 | if (m == MATCH_YES) | |
7717 | { | |
7718 | if (ba->deferred) | |
7719 | { | |
7720 | gfc_error ("Duplicate DEFERRED at %C"); | |
7721 | goto error; | |
7722 | } | |
7723 | ||
7724 | ba->deferred = 1; | |
7725 | continue; | |
7726 | } | |
7727 | } | |
7728 | ||
7fd88f6e | 7729 | } |
7730 | ||
7731 | /* Nothing matching found. */ | |
e2f06a48 | 7732 | if (generic) |
7733 | gfc_error ("Expected access-specifier at %C"); | |
7734 | else | |
7735 | gfc_error ("Expected binding attribute at %C"); | |
7fd88f6e | 7736 | goto error; |
7737 | } | |
7738 | while (gfc_match_char (',') == MATCH_YES); | |
7739 | ||
61c3b81d | 7740 | /* NON_OVERRIDABLE and DEFERRED exclude themselves. */ |
7741 | if (ba->non_overridable && ba->deferred) | |
7742 | { | |
7743 | gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C"); | |
7744 | goto error; | |
7745 | } | |
7746 | ||
fe9b08a2 | 7747 | m = MATCH_YES; |
7748 | ||
7749 | done: | |
e2f06a48 | 7750 | if (ba->access == ACCESS_UNKNOWN) |
7751 | ba->access = gfc_typebound_default_access; | |
7752 | ||
64e93293 | 7753 | if (ppc && !seen_ptr) |
7754 | { | |
7755 | gfc_error ("POINTER attribute is required for procedure pointer component" | |
7756 | " at %C"); | |
7757 | goto error; | |
7758 | } | |
7759 | ||
fe9b08a2 | 7760 | return m; |
7fd88f6e | 7761 | |
7762 | error: | |
7fd88f6e | 7763 | return MATCH_ERROR; |
7764 | } | |
7765 | ||
7766 | ||
7767 | /* Match a PROCEDURE specific binding inside a derived type. */ | |
7768 | ||
7769 | static match | |
7770 | match_procedure_in_type (void) | |
7771 | { | |
7772 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7773 | char target_buf[GFC_MAX_SYMBOL_LEN + 1]; | |
7a3aaef8 | 7774 | char* target = NULL, *ifc = NULL; |
4a12b9ba | 7775 | gfc_typebound_proc tb; |
7fd88f6e | 7776 | bool seen_colons; |
7777 | bool seen_attrs; | |
7778 | match m; | |
7779 | gfc_symtree* stree; | |
7780 | gfc_namespace* ns; | |
7781 | gfc_symbol* block; | |
7a3aaef8 | 7782 | int num; |
7fd88f6e | 7783 | |
7784 | /* Check current state. */ | |
7785 | gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS); | |
7786 | block = gfc_state_stack->previous->sym; | |
7787 | gcc_assert (block); | |
7788 | ||
61c3b81d | 7789 | /* Try to match PROCEDURE(interface). */ |
7fd88f6e | 7790 | if (gfc_match (" (") == MATCH_YES) |
7791 | { | |
61c3b81d | 7792 | m = gfc_match_name (target_buf); |
7793 | if (m == MATCH_ERROR) | |
7794 | return m; | |
7795 | if (m != MATCH_YES) | |
7796 | { | |
7797 | gfc_error ("Interface-name expected after '(' at %C"); | |
7798 | return MATCH_ERROR; | |
7799 | } | |
7800 | ||
7801 | if (gfc_match (" )") != MATCH_YES) | |
7802 | { | |
7803 | gfc_error ("')' expected at %C"); | |
7804 | return MATCH_ERROR; | |
7805 | } | |
7806 | ||
7a3aaef8 | 7807 | ifc = target_buf; |
7fd88f6e | 7808 | } |
7809 | ||
7810 | /* Construct the data structure. */ | |
b3d1387f | 7811 | memset (&tb, 0, sizeof (tb)); |
4a12b9ba | 7812 | tb.where = gfc_current_locus; |
7fd88f6e | 7813 | |
7814 | /* Match binding attributes. */ | |
4a12b9ba | 7815 | m = match_binding_attributes (&tb, false, false); |
7fd88f6e | 7816 | if (m == MATCH_ERROR) |
7817 | return m; | |
7818 | seen_attrs = (m == MATCH_YES); | |
7819 | ||
7a3aaef8 | 7820 | /* Check that attribute DEFERRED is given if an interface is specified. */ |
4a12b9ba | 7821 | if (tb.deferred && !ifc) |
61c3b81d | 7822 | { |
7823 | gfc_error ("Interface must be specified for DEFERRED binding at %C"); | |
7824 | return MATCH_ERROR; | |
7825 | } | |
4a12b9ba | 7826 | if (ifc && !tb.deferred) |
61c3b81d | 7827 | { |
7828 | gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED"); | |
7829 | return MATCH_ERROR; | |
7830 | } | |
7831 | ||
7fd88f6e | 7832 | /* Match the colons. */ |
7833 | m = gfc_match (" ::"); | |
7834 | if (m == MATCH_ERROR) | |
7835 | return m; | |
7836 | seen_colons = (m == MATCH_YES); | |
7837 | if (seen_attrs && !seen_colons) | |
7838 | { | |
7839 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
7840 | return MATCH_ERROR; | |
7841 | } | |
7842 | ||
7a3aaef8 | 7843 | /* Match the binding names. */ |
7844 | for(num=1;;num++) | |
7fd88f6e | 7845 | { |
7a3aaef8 | 7846 | m = gfc_match_name (name); |
7847 | if (m == MATCH_ERROR) | |
7848 | return m; | |
7849 | if (m == MATCH_NO) | |
61c3b81d | 7850 | { |
7a3aaef8 | 7851 | gfc_error ("Expected binding name at %C"); |
61c3b81d | 7852 | return MATCH_ERROR; |
7853 | } | |
7854 | ||
7a3aaef8 | 7855 | if (num>1 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: PROCEDURE list" |
7856 | " at %C") == FAILURE) | |
7857 | return MATCH_ERROR; | |
7fd88f6e | 7858 | |
7a3aaef8 | 7859 | /* Try to match the '=> target', if it's there. */ |
7860 | target = ifc; | |
7861 | m = gfc_match (" =>"); | |
7fd88f6e | 7862 | if (m == MATCH_ERROR) |
7863 | return m; | |
7a3aaef8 | 7864 | if (m == MATCH_YES) |
7fd88f6e | 7865 | { |
4a12b9ba | 7866 | if (tb.deferred) |
7a3aaef8 | 7867 | { |
7868 | gfc_error ("'=> target' is invalid for DEFERRED binding at %C"); | |
7869 | return MATCH_ERROR; | |
7870 | } | |
7871 | ||
7872 | if (!seen_colons) | |
7873 | { | |
7874 | gfc_error ("'::' needed in PROCEDURE binding with explicit target" | |
7875 | " at %C"); | |
7876 | return MATCH_ERROR; | |
7877 | } | |
7878 | ||
7879 | m = gfc_match_name (target_buf); | |
7880 | if (m == MATCH_ERROR) | |
7881 | return m; | |
7882 | if (m == MATCH_NO) | |
7883 | { | |
7884 | gfc_error ("Expected binding target after '=>' at %C"); | |
7885 | return MATCH_ERROR; | |
7886 | } | |
7887 | target = target_buf; | |
7fd88f6e | 7888 | } |
7fd88f6e | 7889 | |
7a3aaef8 | 7890 | /* If no target was found, it has the same name as the binding. */ |
7891 | if (!target) | |
7892 | target = name; | |
7fd88f6e | 7893 | |
7a3aaef8 | 7894 | /* Get the namespace to insert the symbols into. */ |
7895 | ns = block->f2k_derived; | |
7896 | gcc_assert (ns); | |
7fd88f6e | 7897 | |
7a3aaef8 | 7898 | /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */ |
4a12b9ba | 7899 | if (tb.deferred && !block->attr.abstract) |
7a3aaef8 | 7900 | { |
7901 | gfc_error ("Type '%s' containing DEFERRED binding at %C " | |
7902 | "is not ABSTRACT", block->name); | |
7903 | return MATCH_ERROR; | |
7904 | } | |
7fd88f6e | 7905 | |
7a3aaef8 | 7906 | /* See if we already have a binding with this name in the symtree which |
7907 | would be an error. If a GENERIC already targetted this binding, it may | |
7908 | be already there but then typebound is still NULL. */ | |
7909 | stree = gfc_find_symtree (ns->tb_sym_root, name); | |
7910 | if (stree && stree->n.tb) | |
7911 | { | |
7912 | gfc_error ("There is already a procedure with binding name '%s' for " | |
7913 | "the derived type '%s' at %C", name, block->name); | |
7914 | return MATCH_ERROR; | |
7915 | } | |
61c3b81d | 7916 | |
7a3aaef8 | 7917 | /* Insert it and set attributes. */ |
7fd88f6e | 7918 | |
7a3aaef8 | 7919 | if (!stree) |
7920 | { | |
7921 | stree = gfc_new_symtree (&ns->tb_sym_root, name); | |
7922 | gcc_assert (stree); | |
7923 | } | |
4a12b9ba | 7924 | stree->n.tb = gfc_get_typebound_proc (&tb); |
3323e9b1 | 7925 | |
4a12b9ba | 7926 | if (gfc_get_sym_tree (target, gfc_current_ns, &stree->n.tb->u.specific, |
7927 | false)) | |
7a3aaef8 | 7928 | return MATCH_ERROR; |
4a12b9ba | 7929 | gfc_set_sym_referenced (stree->n.tb->u.specific->n.sym); |
7a3aaef8 | 7930 | |
7931 | if (gfc_match_eos () == MATCH_YES) | |
7932 | return MATCH_YES; | |
7933 | if (gfc_match_char (',') != MATCH_YES) | |
7934 | goto syntax; | |
3323e9b1 | 7935 | } |
7fd88f6e | 7936 | |
7a3aaef8 | 7937 | syntax: |
7938 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
7939 | return MATCH_ERROR; | |
7fd88f6e | 7940 | } |
7941 | ||
7942 | ||
e2f06a48 | 7943 | /* Match a GENERIC procedure binding inside a derived type. */ |
7944 | ||
7945 | match | |
7946 | gfc_match_generic (void) | |
7947 | { | |
7948 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
a36eb9ee | 7949 | char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */ |
e2f06a48 | 7950 | gfc_symbol* block; |
7951 | gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */ | |
7952 | gfc_typebound_proc* tb; | |
e2f06a48 | 7953 | gfc_namespace* ns; |
a36eb9ee | 7954 | interface_type op_type; |
7955 | gfc_intrinsic_op op; | |
e2f06a48 | 7956 | match m; |
7957 | ||
7958 | /* Check current state. */ | |
7959 | if (gfc_current_state () == COMP_DERIVED) | |
7960 | { | |
7961 | gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS"); | |
7962 | return MATCH_ERROR; | |
7963 | } | |
7964 | if (gfc_current_state () != COMP_DERIVED_CONTAINS) | |
7965 | return MATCH_NO; | |
7966 | block = gfc_state_stack->previous->sym; | |
7967 | ns = block->f2k_derived; | |
7968 | gcc_assert (block && ns); | |
7969 | ||
b3d1387f | 7970 | memset (&tbattr, 0, sizeof (tbattr)); |
7971 | tbattr.where = gfc_current_locus; | |
7972 | ||
e2f06a48 | 7973 | /* See if we get an access-specifier. */ |
64e93293 | 7974 | m = match_binding_attributes (&tbattr, true, false); |
e2f06a48 | 7975 | if (m == MATCH_ERROR) |
7976 | goto error; | |
7977 | ||
7978 | /* Now the colons, those are required. */ | |
7979 | if (gfc_match (" ::") != MATCH_YES) | |
7980 | { | |
7981 | gfc_error ("Expected '::' at %C"); | |
7982 | goto error; | |
7983 | } | |
7984 | ||
a36eb9ee | 7985 | /* Match the binding name; depending on type (operator / generic) format |
7986 | it for future error messages into bind_name. */ | |
7987 | ||
7988 | m = gfc_match_generic_spec (&op_type, name, &op); | |
e2f06a48 | 7989 | if (m == MATCH_ERROR) |
7990 | return MATCH_ERROR; | |
7991 | if (m == MATCH_NO) | |
7992 | { | |
a36eb9ee | 7993 | gfc_error ("Expected generic name or operator descriptor at %C"); |
e2f06a48 | 7994 | goto error; |
7995 | } | |
7996 | ||
a36eb9ee | 7997 | switch (op_type) |
e2f06a48 | 7998 | { |
a36eb9ee | 7999 | case INTERFACE_GENERIC: |
8000 | snprintf (bind_name, sizeof (bind_name), "%s", name); | |
8001 | break; | |
8002 | ||
8003 | case INTERFACE_USER_OP: | |
8004 | snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name); | |
8005 | break; | |
8006 | ||
8007 | case INTERFACE_INTRINSIC_OP: | |
8008 | snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)", | |
8009 | gfc_op2string (op)); | |
8010 | break; | |
8011 | ||
8012 | default: | |
8013 | gcc_unreachable (); | |
8014 | } | |
3323e9b1 | 8015 | |
a36eb9ee | 8016 | /* Match the required =>. */ |
8017 | if (gfc_match (" =>") != MATCH_YES) | |
8018 | { | |
8019 | gfc_error ("Expected '=>' at %C"); | |
8020 | goto error; | |
8021 | } | |
8022 | ||
8023 | /* Try to find existing GENERIC binding with this name / for this operator; | |
8024 | if there is something, check that it is another GENERIC and then extend | |
8025 | it rather than building a new node. Otherwise, create it and put it | |
8026 | at the right position. */ | |
8027 | ||
8028 | switch (op_type) | |
8029 | { | |
8030 | case INTERFACE_USER_OP: | |
8031 | case INTERFACE_GENERIC: | |
8032 | { | |
8033 | const bool is_op = (op_type == INTERFACE_USER_OP); | |
8034 | gfc_symtree* st; | |
8035 | ||
8036 | st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name); | |
8037 | if (st) | |
8038 | { | |
8039 | tb = st->n.tb; | |
8040 | gcc_assert (tb); | |
8041 | } | |
8042 | else | |
8043 | tb = NULL; | |
8044 | ||
8045 | break; | |
8046 | } | |
8047 | ||
8048 | case INTERFACE_INTRINSIC_OP: | |
8049 | tb = ns->tb_op[op]; | |
8050 | break; | |
8051 | ||
8052 | default: | |
8053 | gcc_unreachable (); | |
8054 | } | |
8055 | ||
8056 | if (tb) | |
8057 | { | |
3323e9b1 | 8058 | if (!tb->is_generic) |
e2f06a48 | 8059 | { |
a36eb9ee | 8060 | gcc_assert (op_type == INTERFACE_GENERIC); |
e2f06a48 | 8061 | gfc_error ("There's already a non-generic procedure with binding name" |
8062 | " '%s' for the derived type '%s' at %C", | |
a36eb9ee | 8063 | bind_name, block->name); |
e2f06a48 | 8064 | goto error; |
8065 | } | |
8066 | ||
e2f06a48 | 8067 | if (tb->access != tbattr.access) |
8068 | { | |
8069 | gfc_error ("Binding at %C must have the same access as already" | |
a36eb9ee | 8070 | " defined binding '%s'", bind_name); |
e2f06a48 | 8071 | goto error; |
8072 | } | |
8073 | } | |
8074 | else | |
8075 | { | |
4a12b9ba | 8076 | tb = gfc_get_typebound_proc (NULL); |
e2f06a48 | 8077 | tb->where = gfc_current_locus; |
8078 | tb->access = tbattr.access; | |
8079 | tb->is_generic = 1; | |
8080 | tb->u.generic = NULL; | |
a36eb9ee | 8081 | |
8082 | switch (op_type) | |
8083 | { | |
8084 | case INTERFACE_GENERIC: | |
8085 | case INTERFACE_USER_OP: | |
8086 | { | |
8087 | const bool is_op = (op_type == INTERFACE_USER_OP); | |
8088 | gfc_symtree* st; | |
8089 | ||
8090 | st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root, | |
8091 | name); | |
8092 | gcc_assert (st); | |
8093 | st->n.tb = tb; | |
8094 | ||
8095 | break; | |
8096 | } | |
8097 | ||
8098 | case INTERFACE_INTRINSIC_OP: | |
8099 | ns->tb_op[op] = tb; | |
8100 | break; | |
8101 | ||
8102 | default: | |
8103 | gcc_unreachable (); | |
8104 | } | |
e2f06a48 | 8105 | } |
8106 | ||
8107 | /* Now, match all following names as specific targets. */ | |
8108 | do | |
8109 | { | |
8110 | gfc_symtree* target_st; | |
8111 | gfc_tbp_generic* target; | |
8112 | ||
8113 | m = gfc_match_name (name); | |
8114 | if (m == MATCH_ERROR) | |
8115 | goto error; | |
8116 | if (m == MATCH_NO) | |
8117 | { | |
8118 | gfc_error ("Expected specific binding name at %C"); | |
8119 | goto error; | |
8120 | } | |
8121 | ||
3323e9b1 | 8122 | target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name); |
e2f06a48 | 8123 | |
8124 | /* See if this is a duplicate specification. */ | |
8125 | for (target = tb->u.generic; target; target = target->next) | |
8126 | if (target_st == target->specific_st) | |
8127 | { | |
8128 | gfc_error ("'%s' already defined as specific binding for the" | |
a36eb9ee | 8129 | " generic '%s' at %C", name, bind_name); |
e2f06a48 | 8130 | goto error; |
8131 | } | |
8132 | ||
e2f06a48 | 8133 | target = gfc_get_tbp_generic (); |
8134 | target->specific_st = target_st; | |
8135 | target->specific = NULL; | |
8136 | target->next = tb->u.generic; | |
8137 | tb->u.generic = target; | |
8138 | } | |
8139 | while (gfc_match (" ,") == MATCH_YES); | |
8140 | ||
8141 | /* Here should be the end. */ | |
8142 | if (gfc_match_eos () != MATCH_YES) | |
8143 | { | |
8144 | gfc_error ("Junk after GENERIC binding at %C"); | |
8145 | goto error; | |
8146 | } | |
8147 | ||
8148 | return MATCH_YES; | |
8149 | ||
8150 | error: | |
8151 | return MATCH_ERROR; | |
8152 | } | |
8153 | ||
8154 | ||
223f0f57 | 8155 | /* Match a FINAL declaration inside a derived type. */ |
8156 | ||
8157 | match | |
8158 | gfc_match_final_decl (void) | |
8159 | { | |
8160 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
8161 | gfc_symbol* sym; | |
8162 | match m; | |
8163 | gfc_namespace* module_ns; | |
8164 | bool first, last; | |
7fd88f6e | 8165 | gfc_symbol* block; |
223f0f57 | 8166 | |
519651c1 | 8167 | if (gfc_current_form == FORM_FREE) |
8168 | { | |
8169 | char c = gfc_peek_ascii_char (); | |
8170 | if (!gfc_is_whitespace (c) && c != ':') | |
8171 | return MATCH_NO; | |
8172 | } | |
8173 | ||
7fd88f6e | 8174 | if (gfc_state_stack->state != COMP_DERIVED_CONTAINS) |
223f0f57 | 8175 | { |
519651c1 | 8176 | if (gfc_current_form == FORM_FIXED) |
8177 | return MATCH_NO; | |
8178 | ||
223f0f57 | 8179 | gfc_error ("FINAL declaration at %C must be inside a derived type " |
7fd88f6e | 8180 | "CONTAINS section"); |
223f0f57 | 8181 | return MATCH_ERROR; |
8182 | } | |
8183 | ||
7fd88f6e | 8184 | block = gfc_state_stack->previous->sym; |
8185 | gcc_assert (block); | |
223f0f57 | 8186 | |
7fd88f6e | 8187 | if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous |
8188 | || gfc_state_stack->previous->previous->state != COMP_MODULE) | |
223f0f57 | 8189 | { |
8190 | gfc_error ("Derived type declaration with FINAL at %C must be in the" | |
8191 | " specification part of a MODULE"); | |
8192 | return MATCH_ERROR; | |
8193 | } | |
8194 | ||
8195 | module_ns = gfc_current_ns; | |
8196 | gcc_assert (module_ns); | |
8197 | gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE); | |
8198 | ||
8199 | /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */ | |
8200 | if (gfc_match (" ::") == MATCH_ERROR) | |
8201 | return MATCH_ERROR; | |
8202 | ||
8203 | /* Match the sequence of procedure names. */ | |
8204 | first = true; | |
8205 | last = false; | |
8206 | do | |
8207 | { | |
8208 | gfc_finalizer* f; | |
8209 | ||
8210 | if (first && gfc_match_eos () == MATCH_YES) | |
8211 | { | |
8212 | gfc_error ("Empty FINAL at %C"); | |
8213 | return MATCH_ERROR; | |
8214 | } | |
8215 | ||
8216 | m = gfc_match_name (name); | |
8217 | if (m == MATCH_NO) | |
8218 | { | |
8219 | gfc_error ("Expected module procedure name at %C"); | |
8220 | return MATCH_ERROR; | |
8221 | } | |
8222 | else if (m != MATCH_YES) | |
8223 | return MATCH_ERROR; | |
8224 | ||
8225 | if (gfc_match_eos () == MATCH_YES) | |
8226 | last = true; | |
8227 | if (!last && gfc_match_char (',') != MATCH_YES) | |
8228 | { | |
8229 | gfc_error ("Expected ',' at %C"); | |
8230 | return MATCH_ERROR; | |
8231 | } | |
8232 | ||
8233 | if (gfc_get_symbol (name, module_ns, &sym)) | |
8234 | { | |
8235 | gfc_error ("Unknown procedure name \"%s\" at %C", name); | |
8236 | return MATCH_ERROR; | |
8237 | } | |
8238 | ||
8239 | /* Mark the symbol as module procedure. */ | |
8240 | if (sym->attr.proc != PROC_MODULE | |
8241 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
8242 | sym->name, NULL) == FAILURE) | |
8243 | return MATCH_ERROR; | |
8244 | ||
8245 | /* Check if we already have this symbol in the list, this is an error. */ | |
7fd88f6e | 8246 | for (f = block->f2k_derived->finalizers; f; f = f->next) |
e449e4dd | 8247 | if (f->proc_sym == sym) |
223f0f57 | 8248 | { |
8249 | gfc_error ("'%s' at %C is already defined as FINAL procedure!", | |
8250 | name); | |
8251 | return MATCH_ERROR; | |
8252 | } | |
8253 | ||
8254 | /* Add this symbol to the list of finalizers. */ | |
7fd88f6e | 8255 | gcc_assert (block->f2k_derived); |
223f0f57 | 8256 | ++sym->refs; |
48d8ad5a | 8257 | f = XCNEW (gfc_finalizer); |
e449e4dd | 8258 | f->proc_sym = sym; |
8259 | f->proc_tree = NULL; | |
223f0f57 | 8260 | f->where = gfc_current_locus; |
7fd88f6e | 8261 | f->next = block->f2k_derived->finalizers; |
8262 | block->f2k_derived->finalizers = f; | |
223f0f57 | 8263 | |
8264 | first = false; | |
8265 | } | |
8266 | while (!last); | |
8267 | ||
8268 | return MATCH_YES; | |
8269 | } | |
36b0a1b0 | 8270 | |
8271 | ||
8272 | const ext_attr_t ext_attr_list[] = { | |
8273 | { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" }, | |
8274 | { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" }, | |
8275 | { "cdecl", EXT_ATTR_CDECL, "cdecl" }, | |
8276 | { "stdcall", EXT_ATTR_STDCALL, "stdcall" }, | |
8277 | { "fastcall", EXT_ATTR_FASTCALL, "fastcall" }, | |
8278 | { NULL, EXT_ATTR_LAST, NULL } | |
8279 | }; | |
8280 | ||
8281 | /* Match a !GCC$ ATTRIBUTES statement of the form: | |
8282 | !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ... | |
8283 | When we come here, we have already matched the !GCC$ ATTRIBUTES string. | |
8284 | ||
8285 | TODO: We should support all GCC attributes using the same syntax for | |
8286 | the attribute list, i.e. the list in C | |
8287 | __attributes(( attribute-list )) | |
8288 | matches then | |
8289 | !GCC$ ATTRIBUTES attribute-list :: | |
8290 | Cf. c-parser.c's c_parser_attributes; the data can then directly be | |
8291 | saved into a TREE. | |
8292 | ||
8293 | As there is absolutely no risk of confusion, we should never return | |
8294 | MATCH_NO. */ | |
8295 | match | |
8296 | gfc_match_gcc_attributes (void) | |
8297 | { | |
8298 | symbol_attribute attr; | |
8299 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
8300 | unsigned id; | |
8301 | gfc_symbol *sym; | |
8302 | match m; | |
8303 | ||
8304 | gfc_clear_attr (&attr); | |
8305 | for(;;) | |
8306 | { | |
8307 | char ch; | |
8308 | ||
8309 | if (gfc_match_name (name) != MATCH_YES) | |
8310 | return MATCH_ERROR; | |
8311 | ||
8312 | for (id = 0; id < EXT_ATTR_LAST; id++) | |
8313 | if (strcmp (name, ext_attr_list[id].name) == 0) | |
8314 | break; | |
8315 | ||
8316 | if (id == EXT_ATTR_LAST) | |
8317 | { | |
8318 | gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C"); | |
8319 | return MATCH_ERROR; | |
8320 | } | |
8321 | ||
de0c4488 | 8322 | if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus) |
36b0a1b0 | 8323 | == FAILURE) |
8324 | return MATCH_ERROR; | |
8325 | ||
8326 | gfc_gobble_whitespace (); | |
8327 | ch = gfc_next_ascii_char (); | |
8328 | if (ch == ':') | |
8329 | { | |
8330 | /* This is the successful exit condition for the loop. */ | |
8331 | if (gfc_next_ascii_char () == ':') | |
8332 | break; | |
8333 | } | |
8334 | ||
8335 | if (ch == ',') | |
8336 | continue; | |
8337 | ||
8338 | goto syntax; | |
8339 | } | |
8340 | ||
8341 | if (gfc_match_eos () == MATCH_YES) | |
8342 | goto syntax; | |
8343 | ||
8344 | for(;;) | |
8345 | { | |
8346 | m = gfc_match_name (name); | |
8347 | if (m != MATCH_YES) | |
8348 | return m; | |
8349 | ||
8350 | if (find_special (name, &sym, true)) | |
8351 | return MATCH_ERROR; | |
8352 | ||
8353 | sym->attr.ext_attr |= attr.ext_attr; | |
8354 | ||
8355 | if (gfc_match_eos () == MATCH_YES) | |
8356 | break; | |
8357 | ||
8358 | if (gfc_match_char (',') != MATCH_YES) | |
8359 | goto syntax; | |
8360 | } | |
8361 | ||
8362 | return MATCH_YES; | |
8363 | ||
8364 | syntax: | |
8365 | gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C"); | |
8366 | return MATCH_ERROR; | |
8367 | } |