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4ee9c684 | 1 | /* Declaration statement matcher |
8458f4ca | 2 | Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009 |
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" |
4ee9c684 | 28 | |
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; | |
137 | gfc_free_expr (p->expr); | |
138 | gfc_free (p); | |
139 | } | |
140 | } | |
141 | ||
142 | ||
143 | /* Free a list of gfc_data structures. */ | |
144 | ||
145 | void | |
1a9745d2 | 146 | gfc_free_data (gfc_data *p) |
b4f45d02 | 147 | { |
148 | gfc_data *q; | |
149 | ||
150 | for (; p; p = q) | |
151 | { | |
152 | q = p->next; | |
b4f45d02 | 153 | free_variable (p->var); |
154 | free_value (p->value); | |
b4f45d02 | 155 | gfc_free (p); |
156 | } | |
157 | } | |
158 | ||
159 | ||
af29c1f0 | 160 | /* Free all data in a namespace. */ |
1a9745d2 | 161 | |
af29c1f0 | 162 | static void |
f6d0e37a | 163 | gfc_free_data_all (gfc_namespace *ns) |
af29c1f0 | 164 | { |
165 | gfc_data *d; | |
166 | ||
167 | for (;ns->data;) | |
168 | { | |
169 | d = ns->data->next; | |
170 | gfc_free (ns->data); | |
171 | ns->data = d; | |
172 | } | |
173 | } | |
174 | ||
175 | ||
b4f45d02 | 176 | static match var_element (gfc_data_variable *); |
177 | ||
178 | /* Match a list of variables terminated by an iterator and a right | |
179 | parenthesis. */ | |
180 | ||
181 | static match | |
1a9745d2 | 182 | var_list (gfc_data_variable *parent) |
b4f45d02 | 183 | { |
184 | gfc_data_variable *tail, var; | |
185 | match m; | |
186 | ||
187 | m = var_element (&var); | |
188 | if (m == MATCH_ERROR) | |
189 | return MATCH_ERROR; | |
190 | if (m == MATCH_NO) | |
191 | goto syntax; | |
192 | ||
193 | tail = gfc_get_data_variable (); | |
194 | *tail = var; | |
195 | ||
196 | parent->list = tail; | |
197 | ||
198 | for (;;) | |
199 | { | |
200 | if (gfc_match_char (',') != MATCH_YES) | |
201 | goto syntax; | |
202 | ||
203 | m = gfc_match_iterator (&parent->iter, 1); | |
204 | if (m == MATCH_YES) | |
205 | break; | |
206 | if (m == MATCH_ERROR) | |
207 | return MATCH_ERROR; | |
208 | ||
209 | m = var_element (&var); | |
210 | if (m == MATCH_ERROR) | |
211 | return MATCH_ERROR; | |
212 | if (m == MATCH_NO) | |
213 | goto syntax; | |
214 | ||
215 | tail->next = gfc_get_data_variable (); | |
216 | tail = tail->next; | |
217 | ||
218 | *tail = var; | |
219 | } | |
220 | ||
221 | if (gfc_match_char (')') != MATCH_YES) | |
222 | goto syntax; | |
223 | return MATCH_YES; | |
224 | ||
225 | syntax: | |
226 | gfc_syntax_error (ST_DATA); | |
227 | return MATCH_ERROR; | |
228 | } | |
229 | ||
230 | ||
231 | /* Match a single element in a data variable list, which can be a | |
232 | variable-iterator list. */ | |
233 | ||
234 | static match | |
c1977dbe | 235 | var_element (gfc_data_variable *new_var) |
b4f45d02 | 236 | { |
237 | match m; | |
238 | gfc_symbol *sym; | |
239 | ||
c1977dbe | 240 | memset (new_var, 0, sizeof (gfc_data_variable)); |
b4f45d02 | 241 | |
242 | if (gfc_match_char ('(') == MATCH_YES) | |
c1977dbe | 243 | return var_list (new_var); |
b4f45d02 | 244 | |
c1977dbe | 245 | m = gfc_match_variable (&new_var->expr, 0); |
b4f45d02 | 246 | if (m != MATCH_YES) |
247 | return m; | |
248 | ||
c1977dbe | 249 | sym = new_var->expr->symtree->n.sym; |
b4f45d02 | 250 | |
40de255b | 251 | /* Symbol should already have an associated type. */ |
252 | if (gfc_check_symbol_typed (sym, gfc_current_ns, | |
253 | false, gfc_current_locus) == FAILURE) | |
254 | return MATCH_ERROR; | |
255 | ||
1a9745d2 | 256 | if (!sym->attr.function && gfc_current_ns->parent |
257 | && gfc_current_ns->parent == sym->ns) | |
b4f45d02 | 258 | { |
c8df3e9c | 259 | gfc_error ("Host associated variable '%s' may not be in the DATA " |
7698a624 | 260 | "statement at %C", sym->name); |
b4f45d02 | 261 | return MATCH_ERROR; |
262 | } | |
263 | ||
c8df3e9c | 264 | if (gfc_current_state () != COMP_BLOCK_DATA |
1a9745d2 | 265 | && sym->attr.in_common |
266 | && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of " | |
267 | "common block variable '%s' in DATA statement at %C", | |
268 | sym->name) == FAILURE) | |
c8df3e9c | 269 | return MATCH_ERROR; |
b4f45d02 | 270 | |
c1977dbe | 271 | if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE) |
b4f45d02 | 272 | return MATCH_ERROR; |
273 | ||
274 | return MATCH_YES; | |
275 | } | |
276 | ||
277 | ||
278 | /* Match the top-level list of data variables. */ | |
279 | ||
280 | static match | |
1a9745d2 | 281 | top_var_list (gfc_data *d) |
b4f45d02 | 282 | { |
c1977dbe | 283 | gfc_data_variable var, *tail, *new_var; |
b4f45d02 | 284 | match m; |
285 | ||
286 | tail = NULL; | |
287 | ||
288 | for (;;) | |
289 | { | |
290 | m = var_element (&var); | |
291 | if (m == MATCH_NO) | |
292 | goto syntax; | |
293 | if (m == MATCH_ERROR) | |
294 | return MATCH_ERROR; | |
295 | ||
c1977dbe | 296 | new_var = gfc_get_data_variable (); |
297 | *new_var = var; | |
b4f45d02 | 298 | |
299 | if (tail == NULL) | |
c1977dbe | 300 | d->var = new_var; |
b4f45d02 | 301 | else |
c1977dbe | 302 | tail->next = new_var; |
b4f45d02 | 303 | |
c1977dbe | 304 | tail = new_var; |
b4f45d02 | 305 | |
306 | if (gfc_match_char ('/') == MATCH_YES) | |
307 | break; | |
308 | if (gfc_match_char (',') != MATCH_YES) | |
309 | goto syntax; | |
310 | } | |
311 | ||
312 | return MATCH_YES; | |
313 | ||
314 | syntax: | |
315 | gfc_syntax_error (ST_DATA); | |
af29c1f0 | 316 | gfc_free_data_all (gfc_current_ns); |
b4f45d02 | 317 | return MATCH_ERROR; |
318 | } | |
319 | ||
320 | ||
321 | static match | |
1a9745d2 | 322 | match_data_constant (gfc_expr **result) |
b4f45d02 | 323 | { |
324 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
325 | gfc_symbol *sym; | |
326 | gfc_expr *expr; | |
327 | match m; | |
096d4ad9 | 328 | locus old_loc; |
b4f45d02 | 329 | |
330 | m = gfc_match_literal_constant (&expr, 1); | |
331 | if (m == MATCH_YES) | |
332 | { | |
333 | *result = expr; | |
334 | return MATCH_YES; | |
335 | } | |
336 | ||
337 | if (m == MATCH_ERROR) | |
338 | return MATCH_ERROR; | |
339 | ||
340 | m = gfc_match_null (result); | |
341 | if (m != MATCH_NO) | |
342 | return m; | |
343 | ||
096d4ad9 | 344 | old_loc = gfc_current_locus; |
345 | ||
346 | /* Should this be a structure component, try to match it | |
347 | before matching a name. */ | |
348 | m = gfc_match_rvalue (result); | |
349 | if (m == MATCH_ERROR) | |
350 | return m; | |
351 | ||
352 | if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE) | |
353 | { | |
354 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
355 | m = MATCH_ERROR; | |
356 | return m; | |
357 | } | |
358 | ||
359 | gfc_current_locus = old_loc; | |
360 | ||
b4f45d02 | 361 | m = gfc_match_name (name); |
362 | if (m != MATCH_YES) | |
363 | return m; | |
364 | ||
365 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
366 | return MATCH_ERROR; | |
367 | ||
368 | if (sym == NULL | |
369 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
370 | { | |
371 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
372 | name); | |
373 | return MATCH_ERROR; | |
374 | } | |
375 | else if (sym->attr.flavor == FL_DERIVED) | |
ea94d76d | 376 | return gfc_match_structure_constructor (sym, result, false); |
b4f45d02 | 377 | |
f0a51891 | 378 | /* Check to see if the value is an initialization array expression. */ |
379 | if (sym->value->expr_type == EXPR_ARRAY) | |
380 | { | |
381 | gfc_current_locus = old_loc; | |
382 | ||
383 | m = gfc_match_init_expr (result); | |
384 | if (m == MATCH_ERROR) | |
385 | return m; | |
386 | ||
387 | if (m == MATCH_YES) | |
388 | { | |
389 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
390 | m = MATCH_ERROR; | |
391 | ||
392 | if ((*result)->expr_type == EXPR_CONSTANT) | |
393 | return m; | |
394 | else | |
395 | { | |
396 | gfc_error ("Invalid initializer %s in Data statement at %C", name); | |
397 | return MATCH_ERROR; | |
398 | } | |
399 | } | |
400 | } | |
401 | ||
b4f45d02 | 402 | *result = gfc_copy_expr (sym->value); |
403 | return MATCH_YES; | |
404 | } | |
405 | ||
406 | ||
407 | /* Match a list of values in a DATA statement. The leading '/' has | |
408 | already been seen at this point. */ | |
409 | ||
410 | static match | |
1a9745d2 | 411 | top_val_list (gfc_data *data) |
b4f45d02 | 412 | { |
c1977dbe | 413 | gfc_data_value *new_val, *tail; |
b4f45d02 | 414 | gfc_expr *expr; |
b4f45d02 | 415 | match m; |
416 | ||
417 | tail = NULL; | |
418 | ||
419 | for (;;) | |
420 | { | |
421 | m = match_data_constant (&expr); | |
422 | if (m == MATCH_NO) | |
423 | goto syntax; | |
424 | if (m == MATCH_ERROR) | |
425 | return MATCH_ERROR; | |
426 | ||
c1977dbe | 427 | new_val = gfc_get_data_value (); |
428 | mpz_init (new_val->repeat); | |
b4f45d02 | 429 | |
430 | if (tail == NULL) | |
c1977dbe | 431 | data->value = new_val; |
b4f45d02 | 432 | else |
c1977dbe | 433 | tail->next = new_val; |
b4f45d02 | 434 | |
c1977dbe | 435 | tail = new_val; |
b4f45d02 | 436 | |
437 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
438 | { | |
439 | tail->expr = expr; | |
7d74abfd | 440 | mpz_set_ui (tail->repeat, 1); |
b4f45d02 | 441 | } |
442 | else | |
443 | { | |
7d74abfd | 444 | if (expr->ts.type == BT_INTEGER) |
445 | mpz_set (tail->repeat, expr->value.integer); | |
b4f45d02 | 446 | gfc_free_expr (expr); |
b4f45d02 | 447 | |
448 | m = match_data_constant (&tail->expr); | |
449 | if (m == MATCH_NO) | |
450 | goto syntax; | |
451 | if (m == MATCH_ERROR) | |
452 | return MATCH_ERROR; | |
453 | } | |
454 | ||
455 | if (gfc_match_char ('/') == MATCH_YES) | |
456 | break; | |
457 | if (gfc_match_char (',') == MATCH_NO) | |
458 | goto syntax; | |
459 | } | |
460 | ||
461 | return MATCH_YES; | |
462 | ||
463 | syntax: | |
464 | gfc_syntax_error (ST_DATA); | |
af29c1f0 | 465 | gfc_free_data_all (gfc_current_ns); |
b4f45d02 | 466 | return MATCH_ERROR; |
467 | } | |
468 | ||
469 | ||
470 | /* Matches an old style initialization. */ | |
471 | ||
472 | static match | |
473 | match_old_style_init (const char *name) | |
474 | { | |
475 | match m; | |
476 | gfc_symtree *st; | |
344b937e | 477 | gfc_symbol *sym; |
b4f45d02 | 478 | gfc_data *newdata; |
479 | ||
480 | /* Set up data structure to hold initializers. */ | |
481 | gfc_find_sym_tree (name, NULL, 0, &st); | |
344b937e | 482 | sym = st->n.sym; |
483 | ||
b4f45d02 | 484 | newdata = gfc_get_data (); |
485 | newdata->var = gfc_get_data_variable (); | |
486 | newdata->var->expr = gfc_get_variable_expr (st); | |
5aed5db3 | 487 | newdata->where = gfc_current_locus; |
b4f45d02 | 488 | |
f6d0e37a | 489 | /* Match initial value list. This also eats the terminal '/'. */ |
b4f45d02 | 490 | m = top_val_list (newdata); |
491 | if (m != MATCH_YES) | |
492 | { | |
493 | gfc_free (newdata); | |
494 | return m; | |
495 | } | |
496 | ||
497 | if (gfc_pure (NULL)) | |
498 | { | |
499 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
500 | gfc_free (newdata); | |
501 | return MATCH_ERROR; | |
502 | } | |
503 | ||
344b937e | 504 | /* Mark the variable as having appeared in a data statement. */ |
505 | if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) | |
506 | { | |
507 | gfc_free (newdata); | |
508 | return MATCH_ERROR; | |
509 | } | |
510 | ||
b4f45d02 | 511 | /* Chain in namespace list of DATA initializers. */ |
512 | newdata->next = gfc_current_ns->data; | |
513 | gfc_current_ns->data = newdata; | |
514 | ||
515 | return m; | |
516 | } | |
517 | ||
1a9745d2 | 518 | |
b4f45d02 | 519 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
39fca56b | 520 | we are matching a DATA statement and are therefore issuing an error |
e14bee04 | 521 | if we encounter something unexpected, if not, we're trying to match |
fe06c0d5 | 522 | an old-style initialization expression of the form INTEGER I /2/. */ |
b4f45d02 | 523 | |
524 | match | |
525 | gfc_match_data (void) | |
526 | { | |
c1977dbe | 527 | gfc_data *new_data; |
b4f45d02 | 528 | match m; |
529 | ||
cbbac028 | 530 | set_in_match_data (true); |
1bfea7e8 | 531 | |
b4f45d02 | 532 | for (;;) |
533 | { | |
c1977dbe | 534 | new_data = gfc_get_data (); |
535 | new_data->where = gfc_current_locus; | |
b4f45d02 | 536 | |
c1977dbe | 537 | m = top_var_list (new_data); |
b4f45d02 | 538 | if (m != MATCH_YES) |
539 | goto cleanup; | |
540 | ||
c1977dbe | 541 | m = top_val_list (new_data); |
b4f45d02 | 542 | if (m != MATCH_YES) |
543 | goto cleanup; | |
544 | ||
c1977dbe | 545 | new_data->next = gfc_current_ns->data; |
546 | gfc_current_ns->data = new_data; | |
b4f45d02 | 547 | |
548 | if (gfc_match_eos () == MATCH_YES) | |
549 | break; | |
550 | ||
551 | gfc_match_char (','); /* Optional comma */ | |
552 | } | |
553 | ||
cbbac028 | 554 | set_in_match_data (false); |
1bfea7e8 | 555 | |
b4f45d02 | 556 | if (gfc_pure (NULL)) |
557 | { | |
558 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
559 | return MATCH_ERROR; | |
560 | } | |
561 | ||
562 | return MATCH_YES; | |
563 | ||
564 | cleanup: | |
cbbac028 | 565 | set_in_match_data (false); |
c1977dbe | 566 | gfc_free_data (new_data); |
b4f45d02 | 567 | return MATCH_ERROR; |
568 | } | |
569 | ||
570 | ||
571 | /************************ Declaration statements *********************/ | |
572 | ||
4ee9c684 | 573 | /* Match an intent specification. Since this can only happen after an |
574 | INTENT word, a legal intent-spec must follow. */ | |
575 | ||
576 | static sym_intent | |
577 | match_intent_spec (void) | |
578 | { | |
579 | ||
580 | if (gfc_match (" ( in out )") == MATCH_YES) | |
581 | return INTENT_INOUT; | |
582 | if (gfc_match (" ( in )") == MATCH_YES) | |
583 | return INTENT_IN; | |
584 | if (gfc_match (" ( out )") == MATCH_YES) | |
585 | return INTENT_OUT; | |
586 | ||
587 | gfc_error ("Bad INTENT specification at %C"); | |
588 | return INTENT_UNKNOWN; | |
589 | } | |
590 | ||
591 | ||
592 | /* Matches a character length specification, which is either a | |
593 | specification expression or a '*'. */ | |
594 | ||
595 | static match | |
1a9745d2 | 596 | char_len_param_value (gfc_expr **expr) |
4ee9c684 | 597 | { |
294d58d3 | 598 | match m; |
599 | ||
4ee9c684 | 600 | if (gfc_match_char ('*') == MATCH_YES) |
601 | { | |
602 | *expr = NULL; | |
603 | return MATCH_YES; | |
604 | } | |
605 | ||
294d58d3 | 606 | m = gfc_match_expr (expr); |
40de255b | 607 | |
608 | if (m == MATCH_YES | |
609 | && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE) | |
610 | return MATCH_ERROR; | |
611 | ||
294d58d3 | 612 | if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION) |
613 | { | |
614 | if ((*expr)->value.function.actual | |
615 | && (*expr)->value.function.actual->expr->symtree) | |
616 | { | |
617 | gfc_expr *e; | |
618 | e = (*expr)->value.function.actual->expr; | |
619 | if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE | |
620 | && e->expr_type == EXPR_VARIABLE) | |
621 | { | |
622 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) | |
623 | goto syntax; | |
624 | if (e->symtree->n.sym->ts.type == BT_CHARACTER | |
625 | && e->symtree->n.sym->ts.cl | |
626 | && e->symtree->n.sym->ts.cl->length->ts.type == BT_UNKNOWN) | |
627 | goto syntax; | |
628 | } | |
629 | } | |
630 | } | |
631 | return m; | |
632 | ||
633 | syntax: | |
634 | gfc_error ("Conflict in attributes of function argument at %C"); | |
635 | return MATCH_ERROR; | |
4ee9c684 | 636 | } |
637 | ||
638 | ||
639 | /* A character length is a '*' followed by a literal integer or a | |
640 | char_len_param_value in parenthesis. */ | |
641 | ||
642 | static match | |
1a9745d2 | 643 | match_char_length (gfc_expr **expr) |
4ee9c684 | 644 | { |
3bd3b616 | 645 | int length; |
4ee9c684 | 646 | match m; |
647 | ||
648 | m = gfc_match_char ('*'); | |
649 | if (m != MATCH_YES) | |
650 | return m; | |
651 | ||
3bd3b616 | 652 | m = gfc_match_small_literal_int (&length, NULL); |
4ee9c684 | 653 | if (m == MATCH_ERROR) |
654 | return m; | |
655 | ||
656 | if (m == MATCH_YES) | |
657 | { | |
658 | *expr = gfc_int_expr (length); | |
659 | return m; | |
660 | } | |
661 | ||
662 | if (gfc_match_char ('(') == MATCH_NO) | |
663 | goto syntax; | |
664 | ||
665 | m = char_len_param_value (expr); | |
077932f9 | 666 | if (m != MATCH_YES && gfc_matching_function) |
667 | { | |
668 | gfc_undo_symbols (); | |
669 | m = MATCH_YES; | |
670 | } | |
671 | ||
4ee9c684 | 672 | if (m == MATCH_ERROR) |
673 | return m; | |
674 | if (m == MATCH_NO) | |
675 | goto syntax; | |
676 | ||
677 | if (gfc_match_char (')') == MATCH_NO) | |
678 | { | |
679 | gfc_free_expr (*expr); | |
680 | *expr = NULL; | |
681 | goto syntax; | |
682 | } | |
683 | ||
684 | return MATCH_YES; | |
685 | ||
686 | syntax: | |
687 | gfc_error ("Syntax error in character length specification at %C"); | |
688 | return MATCH_ERROR; | |
689 | } | |
690 | ||
691 | ||
ee893be6 | 692 | /* Special subroutine for finding a symbol. Check if the name is found |
693 | in the current name space. If not, and we're compiling a function or | |
694 | subroutine and the parent compilation unit is an interface, then check | |
695 | to see if the name we've been given is the name of the interface | |
696 | (located in another namespace). */ | |
4ee9c684 | 697 | |
698 | static int | |
36b0a1b0 | 699 | find_special (const char *name, gfc_symbol **result, bool allow_subroutine) |
4ee9c684 | 700 | { |
701 | gfc_state_data *s; | |
36b0a1b0 | 702 | gfc_symtree *st; |
ee893be6 | 703 | int i; |
4ee9c684 | 704 | |
36b0a1b0 | 705 | i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine); |
e14bee04 | 706 | if (i == 0) |
36b0a1b0 | 707 | { |
708 | *result = st ? st->n.sym : NULL; | |
709 | goto end; | |
710 | } | |
e14bee04 | 711 | |
4ee9c684 | 712 | if (gfc_current_state () != COMP_SUBROUTINE |
713 | && gfc_current_state () != COMP_FUNCTION) | |
ee893be6 | 714 | goto end; |
4ee9c684 | 715 | |
716 | s = gfc_state_stack->previous; | |
717 | if (s == NULL) | |
ee893be6 | 718 | goto end; |
4ee9c684 | 719 | |
720 | if (s->state != COMP_INTERFACE) | |
ee893be6 | 721 | goto end; |
4ee9c684 | 722 | if (s->sym == NULL) |
f6d0e37a | 723 | goto end; /* Nameless interface. */ |
4ee9c684 | 724 | |
725 | if (strcmp (name, s->sym->name) == 0) | |
726 | { | |
727 | *result = s->sym; | |
728 | return 0; | |
729 | } | |
730 | ||
ee893be6 | 731 | end: |
732 | return i; | |
4ee9c684 | 733 | } |
734 | ||
735 | ||
736 | /* Special subroutine for getting a symbol node associated with a | |
737 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
738 | symbol is created in the parent using with symtree node in the | |
739 | child unit pointing to the symbol. If the current namespace has no | |
740 | parent, then the symbol is just created in the current unit. */ | |
741 | ||
742 | static int | |
1a9745d2 | 743 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
4ee9c684 | 744 | { |
745 | gfc_symtree *st; | |
746 | gfc_symbol *sym; | |
2ddb8ed9 | 747 | int rc = 0; |
4ee9c684 | 748 | |
d77f260f | 749 | /* Module functions have to be left in their own namespace because |
750 | they have potentially (almost certainly!) already been referenced. | |
751 | In this sense, they are rather like external functions. This is | |
752 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
753 | space is set to point to the master function, so that the fake | |
754 | result mechanism can work. */ | |
755 | if (module_fcn_entry) | |
861d824f | 756 | { |
757 | /* Present if entry is declared to be a module procedure. */ | |
758 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); | |
c6a05992 | 759 | |
861d824f | 760 | if (*result == NULL) |
761 | rc = gfc_get_symbol (name, NULL, result); | |
a78f714d | 762 | else if (!gfc_get_symbol (name, NULL, &sym) && sym |
c6a05992 | 763 | && (*result)->ts.type == BT_UNKNOWN |
764 | && sym->attr.flavor == FL_UNKNOWN) | |
765 | /* Pick up the typespec for the entry, if declared in the function | |
766 | body. Note that this symbol is FL_UNKNOWN because it will | |
767 | only have appeared in a type declaration. The local symtree | |
768 | is set to point to the module symbol and a unique symtree | |
769 | to the local version. This latter ensures a correct clearing | |
770 | of the symbols. */ | |
a78f714d | 771 | { |
772 | /* If the ENTRY proceeds its specification, we need to ensure | |
773 | that this does not raise a "has no IMPLICIT type" error. */ | |
774 | if (sym->ts.type == BT_UNKNOWN) | |
2168078b | 775 | sym->attr.untyped = 1; |
a78f714d | 776 | |
2168078b | 777 | (*result)->ts = sym->ts; |
a78f714d | 778 | |
779 | /* Put the symbol in the procedure namespace so that, should | |
69b1505f | 780 | the ENTRY precede its specification, the specification |
a78f714d | 781 | can be applied. */ |
782 | (*result)->ns = gfc_current_ns; | |
783 | ||
784 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); | |
785 | st->n.sym = *result; | |
786 | st = gfc_get_unique_symtree (gfc_current_ns); | |
787 | st->n.sym = sym; | |
788 | } | |
861d824f | 789 | } |
858f9894 | 790 | else |
791 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
4ee9c684 | 792 | |
2ddb8ed9 | 793 | if (rc) |
794 | return rc; | |
795 | ||
858f9894 | 796 | sym = *result; |
c717e399 | 797 | gfc_current_ns->refs++; |
4ee9c684 | 798 | |
c1977dbe | 799 | if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE) |
858f9894 | 800 | { |
16f49153 | 801 | /* Trap another encompassed procedure with the same name. All |
802 | these conditions are necessary to avoid picking up an entry | |
803 | whose name clashes with that of the encompassing procedure; | |
804 | this is handled using gsymbols to register unique,globally | |
805 | accessible names. */ | |
858f9894 | 806 | if (sym->attr.flavor != 0 |
1a9745d2 | 807 | && sym->attr.proc != 0 |
808 | && (sym->attr.subroutine || sym->attr.function) | |
809 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
858f9894 | 810 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
811 | name, &sym->declared_at); | |
812 | ||
5720fd2f | 813 | /* Trap a procedure with a name the same as interface in the |
814 | encompassing scope. */ | |
815 | if (sym->attr.generic != 0 | |
db697236 | 816 | && (sym->attr.subroutine || sym->attr.function) |
817 | && !sym->attr.mod_proc) | |
5720fd2f | 818 | gfc_error_now ("Name '%s' at %C is already defined" |
819 | " as a generic interface at %L", | |
820 | name, &sym->declared_at); | |
821 | ||
858f9894 | 822 | /* Trap declarations of attributes in encompassing scope. The |
823 | signature for this is that ts.kind is set. Legitimate | |
824 | references only set ts.type. */ | |
825 | if (sym->ts.kind != 0 | |
1a9745d2 | 826 | && !sym->attr.implicit_type |
827 | && sym->attr.proc == 0 | |
828 | && gfc_current_ns->parent != NULL | |
829 | && sym->attr.access == 0 | |
830 | && !module_fcn_entry) | |
831 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
832 | "and must not have attributes declared at %L", | |
858f9894 | 833 | name, &sym->declared_at); |
834 | } | |
835 | ||
836 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
837 | return rc; | |
4ee9c684 | 838 | |
d77f260f | 839 | /* Module function entries will already have a symtree in |
840 | the current namespace but will need one at module level. */ | |
841 | if (module_fcn_entry) | |
861d824f | 842 | { |
843 | /* Present if entry is declared to be a module procedure. */ | |
844 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); | |
845 | if (st == NULL) | |
846 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
847 | } | |
d77f260f | 848 | else |
849 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
4ee9c684 | 850 | |
4ee9c684 | 851 | st->n.sym = sym; |
852 | sym->refs++; | |
853 | ||
f6d0e37a | 854 | /* See if the procedure should be a module procedure. */ |
4ee9c684 | 855 | |
d77f260f | 856 | if (((sym->ns->proc_name != NULL |
861d824f | 857 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
858 | && sym->attr.proc != PROC_MODULE) | |
859 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) | |
860 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
861 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 862 | rc = 2; |
863 | ||
864 | return rc; | |
865 | } | |
866 | ||
867 | ||
c5d33754 | 868 | /* Verify that the given symbol representing a parameter is C |
869 | interoperable, by checking to see if it was marked as such after | |
870 | its declaration. If the given symbol is not interoperable, a | |
871 | warning is reported, thus removing the need to return the status to | |
872 | the calling function. The standard does not require the user use | |
873 | one of the iso_c_binding named constants to declare an | |
874 | interoperable parameter, but we can't be sure if the param is C | |
875 | interop or not if the user doesn't. For example, integer(4) may be | |
876 | legal Fortran, but doesn't have meaning in C. It may interop with | |
877 | a number of the C types, which causes a problem because the | |
878 | compiler can't know which one. This code is almost certainly not | |
879 | portable, and the user will get what they deserve if the C type | |
880 | across platforms isn't always interoperable with integer(4). If | |
881 | the user had used something like integer(c_int) or integer(c_long), | |
882 | the compiler could have automatically handled the varying sizes | |
883 | across platforms. */ | |
884 | ||
f6bb8f4b | 885 | gfc_try |
c5d33754 | 886 | verify_c_interop_param (gfc_symbol *sym) |
887 | { | |
888 | int is_c_interop = 0; | |
f6bb8f4b | 889 | gfc_try retval = SUCCESS; |
c5d33754 | 890 | |
891 | /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). | |
892 | Don't repeat the checks here. */ | |
893 | if (sym->attr.implicit_type) | |
894 | return SUCCESS; | |
895 | ||
896 | /* For subroutines or functions that are passed to a BIND(C) procedure, | |
897 | they're interoperable if they're BIND(C) and their params are all | |
898 | interoperable. */ | |
899 | if (sym->attr.flavor == FL_PROCEDURE) | |
900 | { | |
901 | if (sym->attr.is_bind_c == 0) | |
902 | { | |
903 | gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " | |
904 | "attribute to be C interoperable", sym->name, | |
905 | &(sym->declared_at)); | |
906 | ||
907 | return FAILURE; | |
908 | } | |
909 | else | |
910 | { | |
911 | if (sym->attr.is_c_interop == 1) | |
912 | /* We've already checked this procedure; don't check it again. */ | |
913 | return SUCCESS; | |
914 | else | |
915 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, | |
916 | sym->common_block); | |
917 | } | |
918 | } | |
919 | ||
920 | /* See if we've stored a reference to a procedure that owns sym. */ | |
921 | if (sym->ns != NULL && sym->ns->proc_name != NULL) | |
922 | { | |
923 | if (sym->ns->proc_name->attr.is_bind_c == 1) | |
924 | { | |
925 | is_c_interop = | |
209d3778 | 926 | (verify_c_interop (&(sym->ts)) |
c5d33754 | 927 | == SUCCESS ? 1 : 0); |
928 | ||
929 | if (is_c_interop != 1) | |
930 | { | |
931 | /* Make personalized messages to give better feedback. */ | |
932 | if (sym->ts.type == BT_DERIVED) | |
933 | gfc_error ("Type '%s' at %L is a parameter to the BIND(C) " | |
934 | " procedure '%s' but is not C interoperable " | |
935 | "because derived type '%s' is not C interoperable", | |
936 | sym->name, &(sym->declared_at), | |
937 | sym->ns->proc_name->name, | |
938 | sym->ts.derived->name); | |
939 | else | |
940 | gfc_warning ("Variable '%s' at %L is a parameter to the " | |
941 | "BIND(C) procedure '%s' but may not be C " | |
942 | "interoperable", | |
943 | sym->name, &(sym->declared_at), | |
944 | sym->ns->proc_name->name); | |
945 | } | |
e4eda3ec | 946 | |
947 | /* Character strings are only C interoperable if they have a | |
948 | length of 1. */ | |
949 | if (sym->ts.type == BT_CHARACTER) | |
950 | { | |
951 | gfc_charlen *cl = sym->ts.cl; | |
952 | if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT | |
953 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) | |
954 | { | |
955 | gfc_error ("Character argument '%s' at %L " | |
956 | "must be length 1 because " | |
957 | "procedure '%s' is BIND(C)", | |
958 | sym->name, &sym->declared_at, | |
959 | sym->ns->proc_name->name); | |
960 | retval = FAILURE; | |
961 | } | |
962 | } | |
963 | ||
c5d33754 | 964 | /* We have to make sure that any param to a bind(c) routine does |
965 | not have the allocatable, pointer, or optional attributes, | |
966 | according to J3/04-007, section 5.1. */ | |
967 | if (sym->attr.allocatable == 1) | |
968 | { | |
969 | gfc_error ("Variable '%s' at %L cannot have the " | |
970 | "ALLOCATABLE attribute because procedure '%s'" | |
971 | " is BIND(C)", sym->name, &(sym->declared_at), | |
972 | sym->ns->proc_name->name); | |
973 | retval = FAILURE; | |
974 | } | |
975 | ||
976 | if (sym->attr.pointer == 1) | |
977 | { | |
978 | gfc_error ("Variable '%s' at %L cannot have the " | |
979 | "POINTER attribute because procedure '%s'" | |
980 | " is BIND(C)", sym->name, &(sym->declared_at), | |
981 | sym->ns->proc_name->name); | |
982 | retval = FAILURE; | |
983 | } | |
984 | ||
985 | if (sym->attr.optional == 1) | |
986 | { | |
987 | gfc_error ("Variable '%s' at %L cannot have the " | |
988 | "OPTIONAL attribute because procedure '%s'" | |
989 | " is BIND(C)", sym->name, &(sym->declared_at), | |
990 | sym->ns->proc_name->name); | |
991 | retval = FAILURE; | |
992 | } | |
993 | ||
994 | /* Make sure that if it has the dimension attribute, that it is | |
995 | either assumed size or explicit shape. */ | |
996 | if (sym->as != NULL) | |
997 | { | |
998 | if (sym->as->type == AS_ASSUMED_SHAPE) | |
999 | { | |
1000 | gfc_error ("Assumed-shape array '%s' at %L cannot be an " | |
1001 | "argument to the procedure '%s' at %L because " | |
1002 | "the procedure is BIND(C)", sym->name, | |
1003 | &(sym->declared_at), sym->ns->proc_name->name, | |
1004 | &(sym->ns->proc_name->declared_at)); | |
1005 | retval = FAILURE; | |
1006 | } | |
1007 | ||
1008 | if (sym->as->type == AS_DEFERRED) | |
1009 | { | |
1010 | gfc_error ("Deferred-shape array '%s' at %L cannot be an " | |
1011 | "argument to the procedure '%s' at %L because " | |
1012 | "the procedure is BIND(C)", sym->name, | |
1013 | &(sym->declared_at), sym->ns->proc_name->name, | |
1014 | &(sym->ns->proc_name->declared_at)); | |
1015 | retval = FAILURE; | |
1016 | } | |
1017 | } | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | return retval; | |
1022 | } | |
1023 | ||
1024 | ||
1025 | /* Function called by variable_decl() that adds a name to the symbol table. */ | |
4ee9c684 | 1026 | |
f6bb8f4b | 1027 | static gfc_try |
1a9745d2 | 1028 | build_sym (const char *name, gfc_charlen *cl, |
1029 | gfc_array_spec **as, locus *var_locus) | |
4ee9c684 | 1030 | { |
1031 | symbol_attribute attr; | |
1032 | gfc_symbol *sym; | |
1033 | ||
ee893be6 | 1034 | if (gfc_get_symbol (name, NULL, &sym)) |
4ee9c684 | 1035 | return FAILURE; |
1036 | ||
f6d0e37a | 1037 | /* Start updating the symbol table. Add basic type attribute if present. */ |
4ee9c684 | 1038 | if (current_ts.type != BT_UNKNOWN |
1a9745d2 | 1039 | && (sym->attr.implicit_type == 0 |
1040 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
4ee9c684 | 1041 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
1042 | return FAILURE; | |
1043 | ||
1044 | if (sym->ts.type == BT_CHARACTER) | |
1045 | sym->ts.cl = cl; | |
1046 | ||
1047 | /* Add dimension attribute if present. */ | |
1048 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
1049 | return FAILURE; | |
1050 | *as = NULL; | |
1051 | ||
1052 | /* Add attribute to symbol. The copy is so that we can reset the | |
1053 | dimension attribute. */ | |
1054 | attr = current_attr; | |
1055 | attr.dimension = 0; | |
1056 | ||
1057 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
1058 | return FAILURE; | |
1059 | ||
c5d33754 | 1060 | /* Finish any work that may need to be done for the binding label, |
1061 | if it's a bind(c). The bind(c) attr is found before the symbol | |
1062 | is made, and before the symbol name (for data decls), so the | |
1063 | current_ts is holding the binding label, or nothing if the | |
1064 | name= attr wasn't given. Therefore, test here if we're dealing | |
1065 | with a bind(c) and make sure the binding label is set correctly. */ | |
1066 | if (sym->attr.is_bind_c == 1) | |
1067 | { | |
1068 | if (sym->binding_label[0] == '\0') | |
1069 | { | |
825718f9 | 1070 | /* Set the binding label and verify that if a NAME= was specified |
1071 | then only one identifier was in the entity-decl-list. */ | |
1072 | if (set_binding_label (sym->binding_label, sym->name, | |
1073 | num_idents_on_line) == FAILURE) | |
c5d33754 | 1074 | return FAILURE; |
1075 | } | |
1076 | } | |
1077 | ||
1078 | /* See if we know we're in a common block, and if it's a bind(c) | |
1079 | common then we need to make sure we're an interoperable type. */ | |
1080 | if (sym->attr.in_common == 1) | |
1081 | { | |
1082 | /* Test the common block object. */ | |
1083 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 | |
1084 | && sym->ts.is_c_interop != 1) | |
1085 | { | |
1086 | gfc_error_now ("Variable '%s' in common block '%s' at %C " | |
1087 | "must be declared with a C interoperable " | |
1088 | "kind since common block '%s' is BIND(C)", | |
1089 | sym->name, sym->common_block->name, | |
1090 | sym->common_block->name); | |
1091 | gfc_clear_error (); | |
1092 | } | |
1093 | } | |
1094 | ||
2457a77e | 1095 | sym->attr.implied_index = 0; |
1096 | ||
4ee9c684 | 1097 | return SUCCESS; |
1098 | } | |
1099 | ||
1a9745d2 | 1100 | |
a270dc8e | 1101 | /* Set character constant to the given length. The constant will be padded or |
d1a39099 | 1102 | truncated. If we're inside an array constructor without a typespec, we |
1103 | additionally check that all elements have the same length; check_len -1 | |
1104 | means no checking. */ | |
a270dc8e | 1105 | |
1106 | void | |
d1a39099 | 1107 | gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len) |
a270dc8e | 1108 | { |
c32f863c | 1109 | gfc_char_t *s; |
a270dc8e | 1110 | int slen; |
1111 | ||
1112 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
b44437b9 | 1113 | gcc_assert (expr->ts.type == BT_CHARACTER); |
a270dc8e | 1114 | |
1115 | slen = expr->value.character.length; | |
1116 | if (len != slen) | |
1117 | { | |
c32f863c | 1118 | s = gfc_get_wide_string (len + 1); |
1119 | memcpy (s, expr->value.character.string, | |
1120 | MIN (len, slen) * sizeof (gfc_char_t)); | |
a270dc8e | 1121 | if (len > slen) |
c32f863c | 1122 | gfc_wide_memset (&s[slen], ' ', len - slen); |
1bfea7e8 | 1123 | |
1124 | if (gfc_option.warn_character_truncation && slen > len) | |
1125 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
1126 | "(%d/%d)", &expr->where, slen, len); | |
1127 | ||
1128 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
1129 | initializers. */ | |
d1a39099 | 1130 | if (check_len != -1 && slen != check_len |
1131 | && !(gfc_option.allow_std & GFC_STD_GNU)) | |
1bfea7e8 | 1132 | gfc_error_now ("The CHARACTER elements of the array constructor " |
1133 | "at %L must have the same length (%d/%d)", | |
d1a39099 | 1134 | &expr->where, slen, check_len); |
1bfea7e8 | 1135 | |
89f528df | 1136 | s[len] = '\0'; |
a270dc8e | 1137 | gfc_free (expr->value.character.string); |
1138 | expr->value.character.string = s; | |
1139 | expr->value.character.length = len; | |
1140 | } | |
1141 | } | |
4ee9c684 | 1142 | |
3b6a4b41 | 1143 | |
e14bee04 | 1144 | /* Function to create and update the enumerator history |
3b6a4b41 | 1145 | using the information passed as arguments. |
e14bee04 | 1146 | Pointer "max_enum" is also updated, to point to |
1147 | enum history node containing largest initializer. | |
3b6a4b41 | 1148 | |
1149 | SYM points to the symbol node of enumerator. | |
f6d0e37a | 1150 | INIT points to its enumerator value. */ |
3b6a4b41 | 1151 | |
e14bee04 | 1152 | static void |
1a9745d2 | 1153 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
3b6a4b41 | 1154 | { |
1155 | enumerator_history *new_enum_history; | |
1156 | gcc_assert (sym != NULL && init != NULL); | |
1157 | ||
48d8ad5a | 1158 | new_enum_history = XCNEW (enumerator_history); |
3b6a4b41 | 1159 | |
1160 | new_enum_history->sym = sym; | |
1161 | new_enum_history->initializer = init; | |
1162 | new_enum_history->next = NULL; | |
1163 | ||
1164 | if (enum_history == NULL) | |
1165 | { | |
1166 | enum_history = new_enum_history; | |
1167 | max_enum = enum_history; | |
1168 | } | |
1169 | else | |
1170 | { | |
1171 | new_enum_history->next = enum_history; | |
1172 | enum_history = new_enum_history; | |
1173 | ||
e14bee04 | 1174 | if (mpz_cmp (max_enum->initializer->value.integer, |
3b6a4b41 | 1175 | new_enum_history->initializer->value.integer) < 0) |
1a9745d2 | 1176 | max_enum = new_enum_history; |
3b6a4b41 | 1177 | } |
1178 | } | |
1179 | ||
1180 | ||
e14bee04 | 1181 | /* Function to free enum kind history. */ |
3b6a4b41 | 1182 | |
e14bee04 | 1183 | void |
1a9745d2 | 1184 | gfc_free_enum_history (void) |
3b6a4b41 | 1185 | { |
e14bee04 | 1186 | enumerator_history *current = enum_history; |
1187 | enumerator_history *next; | |
3b6a4b41 | 1188 | |
1189 | while (current != NULL) | |
1190 | { | |
1191 | next = current->next; | |
1192 | gfc_free (current); | |
1193 | current = next; | |
1194 | } | |
1195 | max_enum = NULL; | |
1196 | enum_history = NULL; | |
1197 | } | |
1198 | ||
1199 | ||
4ee9c684 | 1200 | /* Function called by variable_decl() that adds an initialization |
1201 | expression to a symbol. */ | |
1202 | ||
f6bb8f4b | 1203 | static gfc_try |
f6d0e37a | 1204 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) |
4ee9c684 | 1205 | { |
1206 | symbol_attribute attr; | |
1207 | gfc_symbol *sym; | |
1208 | gfc_expr *init; | |
1209 | ||
1210 | init = *initp; | |
36b0a1b0 | 1211 | if (find_special (name, &sym, false)) |
4ee9c684 | 1212 | return FAILURE; |
1213 | ||
1214 | attr = sym->attr; | |
1215 | ||
1216 | /* If this symbol is confirming an implicit parameter type, | |
1217 | then an initialization expression is not allowed. */ | |
1218 | if (attr.flavor == FL_PARAMETER | |
1219 | && sym->value != NULL | |
1220 | && *initp != NULL) | |
1221 | { | |
1222 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
1223 | sym->name); | |
1224 | return FAILURE; | |
1225 | } | |
1226 | ||
1227 | if (init == NULL) | |
1228 | { | |
1229 | /* An initializer is required for PARAMETER declarations. */ | |
1230 | if (attr.flavor == FL_PARAMETER) | |
1231 | { | |
1232 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
1233 | return FAILURE; | |
1234 | } | |
1235 | } | |
1236 | else | |
1237 | { | |
1238 | /* If a variable appears in a DATA block, it cannot have an | |
b97f1a18 | 1239 | initializer. */ |
4ee9c684 | 1240 | if (sym->attr.data) |
1241 | { | |
1a9745d2 | 1242 | gfc_error ("Variable '%s' at %C with an initializer already " |
1243 | "appears in a DATA statement", sym->name); | |
4ee9c684 | 1244 | return FAILURE; |
1245 | } | |
1246 | ||
cca3db55 | 1247 | /* Check if the assignment can happen. This has to be put off |
1248 | until later for a derived type variable. */ | |
4ee9c684 | 1249 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
1250 | && gfc_check_assign_symbol (sym, init) == FAILURE) | |
1251 | return FAILURE; | |
1252 | ||
a270dc8e | 1253 | if (sym->ts.type == BT_CHARACTER && sym->ts.cl) |
1254 | { | |
1255 | /* Update symbol character length according initializer. */ | |
1256 | if (sym->ts.cl->length == NULL) | |
1257 | { | |
03c2a028 | 1258 | int clen; |
f6d0e37a | 1259 | /* If there are multiple CHARACTER variables declared on the |
1260 | same line, we don't want them to share the same length. */ | |
5d50997a | 1261 | sym->ts.cl = gfc_new_charlen (gfc_current_ns); |
e9c873a4 | 1262 | |
03c2a028 | 1263 | if (sym->attr.flavor == FL_PARAMETER) |
1264 | { | |
1265 | if (init->expr_type == EXPR_CONSTANT) | |
1266 | { | |
1267 | clen = init->value.character.length; | |
1268 | sym->ts.cl->length = gfc_int_expr (clen); | |
1269 | } | |
1270 | else if (init->expr_type == EXPR_ARRAY) | |
1271 | { | |
1272 | gfc_expr *p = init->value.constructor->expr; | |
1273 | clen = p->value.character.length; | |
1274 | sym->ts.cl->length = gfc_int_expr (clen); | |
1275 | } | |
1276 | else if (init->ts.cl && init->ts.cl->length) | |
1277 | sym->ts.cl->length = | |
1278 | gfc_copy_expr (sym->value->ts.cl->length); | |
1279 | } | |
a270dc8e | 1280 | } |
1281 | /* Update initializer character length according symbol. */ | |
1282 | else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT) | |
1283 | { | |
1284 | int len = mpz_get_si (sym->ts.cl->length->value.integer); | |
1285 | gfc_constructor * p; | |
1286 | ||
1287 | if (init->expr_type == EXPR_CONSTANT) | |
d1a39099 | 1288 | gfc_set_constant_character_len (len, init, -1); |
a270dc8e | 1289 | else if (init->expr_type == EXPR_ARRAY) |
1290 | { | |
39908fd9 | 1291 | /* Build a new charlen to prevent simplification from |
1292 | deleting the length before it is resolved. */ | |
5d50997a | 1293 | init->ts.cl = gfc_new_charlen (gfc_current_ns); |
a270dc8e | 1294 | init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length); |
39908fd9 | 1295 | |
a270dc8e | 1296 | for (p = init->value.constructor; p; p = p->next) |
d1a39099 | 1297 | gfc_set_constant_character_len (len, p->expr, -1); |
a270dc8e | 1298 | } |
1299 | } | |
1300 | } | |
1301 | ||
c5d33754 | 1302 | /* Need to check if the expression we initialized this |
1303 | to was one of the iso_c_binding named constants. If so, | |
1304 | and we're a parameter (constant), let it be iso_c. | |
1305 | For example: | |
1306 | integer(c_int), parameter :: my_int = c_int | |
1307 | integer(my_int) :: my_int_2 | |
1308 | If we mark my_int as iso_c (since we can see it's value | |
1309 | is equal to one of the named constants), then my_int_2 | |
1310 | will be considered C interoperable. */ | |
1311 | if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) | |
1312 | { | |
1313 | sym->ts.is_iso_c |= init->ts.is_iso_c; | |
1314 | sym->ts.is_c_interop |= init->ts.is_c_interop; | |
1315 | /* attr bits needed for module files. */ | |
1316 | sym->attr.is_iso_c |= init->ts.is_iso_c; | |
1317 | sym->attr.is_c_interop |= init->ts.is_c_interop; | |
1318 | if (init->ts.is_iso_c) | |
1319 | sym->ts.f90_type = init->ts.f90_type; | |
1320 | } | |
1321 | ||
4ee9c684 | 1322 | /* Add initializer. Make sure we keep the ranks sane. */ |
1323 | if (sym->attr.dimension && init->rank == 0) | |
7baa3fb4 | 1324 | { |
1325 | mpz_t size; | |
1326 | gfc_expr *array; | |
1327 | gfc_constructor *c; | |
1328 | int n; | |
1329 | if (sym->attr.flavor == FL_PARAMETER | |
1330 | && init->expr_type == EXPR_CONSTANT | |
1331 | && spec_size (sym->as, &size) == SUCCESS | |
1332 | && mpz_cmp_si (size, 0) > 0) | |
1333 | { | |
1334 | array = gfc_start_constructor (init->ts.type, init->ts.kind, | |
1335 | &init->where); | |
1336 | ||
1337 | array->value.constructor = c = NULL; | |
1338 | for (n = 0; n < (int)mpz_get_si (size); n++) | |
1339 | { | |
1340 | if (array->value.constructor == NULL) | |
1341 | { | |
1342 | array->value.constructor = c = gfc_get_constructor (); | |
1343 | c->expr = init; | |
1344 | } | |
1345 | else | |
1346 | { | |
1347 | c->next = gfc_get_constructor (); | |
1348 | c = c->next; | |
1349 | c->expr = gfc_copy_expr (init); | |
1350 | } | |
1351 | } | |
1352 | ||
1353 | array->shape = gfc_get_shape (sym->as->rank); | |
1354 | for (n = 0; n < sym->as->rank; n++) | |
1355 | spec_dimen_size (sym->as, n, &array->shape[n]); | |
1356 | ||
1357 | init = array; | |
1358 | mpz_clear (size); | |
1359 | } | |
1360 | init->rank = sym->as->rank; | |
1361 | } | |
4ee9c684 | 1362 | |
1363 | sym->value = init; | |
3cd3c667 | 1364 | if (sym->attr.save == SAVE_NONE) |
1365 | sym->attr.save = SAVE_IMPLICIT; | |
4ee9c684 | 1366 | *initp = NULL; |
1367 | } | |
1368 | ||
1369 | return SUCCESS; | |
1370 | } | |
1371 | ||
1372 | ||
1373 | /* Function called by variable_decl() that adds a name to a structure | |
1374 | being built. */ | |
1375 | ||
f6bb8f4b | 1376 | static gfc_try |
1a9745d2 | 1377 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
1378 | gfc_array_spec **as) | |
4ee9c684 | 1379 | { |
1380 | gfc_component *c; | |
1381 | ||
1382 | /* If the current symbol is of the same derived type that we're | |
1383 | constructing, it must have the pointer attribute. */ | |
1384 | if (current_ts.type == BT_DERIVED | |
1385 | && current_ts.derived == gfc_current_block () | |
1386 | && current_attr.pointer == 0) | |
1387 | { | |
1388 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1389 | return FAILURE; | |
1390 | } | |
1391 | ||
1a9745d2 | 1392 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
4ee9c684 | 1393 | { |
1394 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1395 | { | |
1396 | gfc_error ("Array component of structure at %C must have explicit " | |
1397 | "or deferred shape"); | |
1398 | return FAILURE; | |
1399 | } | |
1400 | } | |
1401 | ||
1402 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1403 | return FAILURE; | |
1404 | ||
1405 | c->ts = current_ts; | |
1406 | c->ts.cl = cl; | |
3be2b8d5 | 1407 | c->attr = current_attr; |
4ee9c684 | 1408 | |
1409 | c->initializer = *init; | |
1410 | *init = NULL; | |
1411 | ||
1412 | c->as = *as; | |
1413 | if (c->as != NULL) | |
3be2b8d5 | 1414 | c->attr.dimension = 1; |
4ee9c684 | 1415 | *as = NULL; |
1416 | ||
a2f51d5f | 1417 | /* Should this ever get more complicated, combine with similar section |
1418 | in add_init_expr_to_sym into a separate function. */ | |
3be2b8d5 | 1419 | if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.cl |
d1a39099 | 1420 | && c->ts.cl->length && c->ts.cl->length->expr_type == EXPR_CONSTANT) |
a2f51d5f | 1421 | { |
d1a39099 | 1422 | int len; |
1423 | ||
1424 | gcc_assert (c->ts.cl && c->ts.cl->length); | |
1425 | gcc_assert (c->ts.cl->length->expr_type == EXPR_CONSTANT); | |
1426 | gcc_assert (c->ts.cl->length->ts.type == BT_INTEGER); | |
1427 | ||
1428 | len = mpz_get_si (c->ts.cl->length->value.integer); | |
a2f51d5f | 1429 | |
1430 | if (c->initializer->expr_type == EXPR_CONSTANT) | |
d1a39099 | 1431 | gfc_set_constant_character_len (len, c->initializer, -1); |
a2f51d5f | 1432 | else if (mpz_cmp (c->ts.cl->length->value.integer, |
1433 | c->initializer->ts.cl->length->value.integer)) | |
1434 | { | |
d1a39099 | 1435 | bool has_ts; |
a2f51d5f | 1436 | gfc_constructor *ctor = c->initializer->value.constructor; |
d1a39099 | 1437 | |
d1a39099 | 1438 | has_ts = (c->initializer->ts.cl |
1439 | && c->initializer->ts.cl->length_from_typespec); | |
1440 | ||
6e4faf80 | 1441 | if (ctor) |
d1a39099 | 1442 | { |
6e4faf80 | 1443 | int first_len; |
1444 | ||
1445 | /* Remember the length of the first element for checking | |
1446 | that all elements *in the constructor* have the same | |
1447 | length. This need not be the length of the LHS! */ | |
1448 | gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT); | |
1449 | gcc_assert (ctor->expr->ts.type == BT_CHARACTER); | |
1450 | first_len = ctor->expr->value.character.length; | |
1451 | ||
1452 | for (; ctor; ctor = ctor->next) | |
d1a39099 | 1453 | { |
6e4faf80 | 1454 | if (ctor->expr->expr_type == EXPR_CONSTANT) |
1455 | gfc_set_constant_character_len (len, ctor->expr, | |
1456 | has_ts ? -1 : first_len); | |
d1a39099 | 1457 | } |
d1a39099 | 1458 | } |
a2f51d5f | 1459 | } |
1460 | } | |
1461 | ||
4ee9c684 | 1462 | /* Check array components. */ |
3be2b8d5 | 1463 | if (!c->attr.dimension) |
2294b616 | 1464 | { |
3be2b8d5 | 1465 | if (c->attr.allocatable) |
2294b616 | 1466 | { |
1467 | gfc_error ("Allocatable component at %C must be an array"); | |
1468 | return FAILURE; | |
1469 | } | |
1470 | else | |
1471 | return SUCCESS; | |
1472 | } | |
4ee9c684 | 1473 | |
3be2b8d5 | 1474 | if (c->attr.pointer) |
4ee9c684 | 1475 | { |
1476 | if (c->as->type != AS_DEFERRED) | |
1477 | { | |
2294b616 | 1478 | gfc_error ("Pointer array component of structure at %C must have a " |
1479 | "deferred shape"); | |
1480 | return FAILURE; | |
1481 | } | |
1482 | } | |
3be2b8d5 | 1483 | else if (c->attr.allocatable) |
2294b616 | 1484 | { |
1485 | if (c->as->type != AS_DEFERRED) | |
1486 | { | |
1487 | gfc_error ("Allocatable component of structure at %C must have a " | |
1488 | "deferred shape"); | |
4ee9c684 | 1489 | return FAILURE; |
1490 | } | |
1491 | } | |
1492 | else | |
1493 | { | |
1494 | if (c->as->type != AS_EXPLICIT) | |
1495 | { | |
1a9745d2 | 1496 | gfc_error ("Array component of structure at %C must have an " |
1497 | "explicit shape"); | |
4ee9c684 | 1498 | return FAILURE; |
1499 | } | |
1500 | } | |
1501 | ||
1502 | return SUCCESS; | |
1503 | } | |
1504 | ||
1505 | ||
1506 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1507 | ||
1508 | match | |
1a9745d2 | 1509 | gfc_match_null (gfc_expr **result) |
4ee9c684 | 1510 | { |
1511 | gfc_symbol *sym; | |
1512 | gfc_expr *e; | |
1513 | match m; | |
1514 | ||
1515 | m = gfc_match (" null ( )"); | |
1516 | if (m != MATCH_YES) | |
1517 | return m; | |
1518 | ||
1519 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1520 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1521 | { | |
1522 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1523 | return MATCH_ERROR; | |
1524 | } | |
1525 | ||
1526 | gfc_intrinsic_symbol (sym); | |
1527 | ||
1528 | if (sym->attr.proc != PROC_INTRINSIC | |
950683ed | 1529 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1530 | sym->name, NULL) == FAILURE | |
1531 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
4ee9c684 | 1532 | return MATCH_ERROR; |
1533 | ||
1534 | e = gfc_get_expr (); | |
cbb9e6aa | 1535 | e->where = gfc_current_locus; |
4ee9c684 | 1536 | e->expr_type = EXPR_NULL; |
1537 | e->ts.type = BT_UNKNOWN; | |
1538 | ||
1539 | *result = e; | |
1540 | ||
1541 | return MATCH_YES; | |
1542 | } | |
1543 | ||
1544 | ||
4ee9c684 | 1545 | /* Match a variable name with an optional initializer. When this |
1546 | subroutine is called, a variable is expected to be parsed next. | |
1547 | Depending on what is happening at the moment, updates either the | |
1548 | symbol table or the current interface. */ | |
1549 | ||
1550 | static match | |
3923b69f | 1551 | variable_decl (int elem) |
4ee9c684 | 1552 | { |
1553 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1554 | gfc_expr *initializer, *char_len; | |
1555 | gfc_array_spec *as; | |
b549d2a5 | 1556 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
4ee9c684 | 1557 | gfc_charlen *cl; |
1558 | locus var_locus; | |
1559 | match m; | |
f6bb8f4b | 1560 | gfc_try t; |
b549d2a5 | 1561 | gfc_symbol *sym; |
3b6a4b41 | 1562 | locus old_locus; |
4ee9c684 | 1563 | |
1564 | initializer = NULL; | |
1565 | as = NULL; | |
b549d2a5 | 1566 | cp_as = NULL; |
3b6a4b41 | 1567 | old_locus = gfc_current_locus; |
4ee9c684 | 1568 | |
1569 | /* When we get here, we've just matched a list of attributes and | |
1570 | maybe a type and a double colon. The next thing we expect to see | |
1571 | is the name of the symbol. */ | |
1572 | m = gfc_match_name (name); | |
1573 | if (m != MATCH_YES) | |
1574 | goto cleanup; | |
1575 | ||
cbb9e6aa | 1576 | var_locus = gfc_current_locus; |
4ee9c684 | 1577 | |
1578 | /* Now we could see the optional array spec. or character length. */ | |
1579 | m = gfc_match_array_spec (&as); | |
b549d2a5 | 1580 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1581 | cp_as = gfc_copy_array_spec (as); | |
1582 | else if (m == MATCH_ERROR) | |
4ee9c684 | 1583 | goto cleanup; |
3b6a4b41 | 1584 | |
4ee9c684 | 1585 | if (m == MATCH_NO) |
1586 | as = gfc_copy_array_spec (current_as); | |
1587 | ||
1588 | char_len = NULL; | |
1589 | cl = NULL; | |
1590 | ||
1591 | if (current_ts.type == BT_CHARACTER) | |
1592 | { | |
1593 | switch (match_char_length (&char_len)) | |
1594 | { | |
1595 | case MATCH_YES: | |
5d50997a | 1596 | cl = gfc_new_charlen (gfc_current_ns); |
4ee9c684 | 1597 | |
1598 | cl->length = char_len; | |
1599 | break; | |
1600 | ||
3923b69f | 1601 | /* Non-constant lengths need to be copied after the first |
04b61f60 | 1602 | element. Also copy assumed lengths. */ |
4ee9c684 | 1603 | case MATCH_NO: |
04b61f60 | 1604 | if (elem > 1 |
1605 | && (current_ts.cl->length == NULL | |
1606 | || current_ts.cl->length->expr_type != EXPR_CONSTANT)) | |
3923b69f | 1607 | { |
5d50997a | 1608 | cl = gfc_new_charlen (gfc_current_ns); |
3923b69f | 1609 | cl->length = gfc_copy_expr (current_ts.cl->length); |
1610 | } | |
1611 | else | |
1612 | cl = current_ts.cl; | |
1613 | ||
4ee9c684 | 1614 | break; |
1615 | ||
1616 | case MATCH_ERROR: | |
1617 | goto cleanup; | |
1618 | } | |
1619 | } | |
1620 | ||
b549d2a5 | 1621 | /* If this symbol has already shown up in a Cray Pointer declaration, |
f6d0e37a | 1622 | then we want to set the type & bail out. */ |
b549d2a5 | 1623 | if (gfc_option.flag_cray_pointer) |
1624 | { | |
1625 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1626 | if (sym != NULL && sym->attr.cray_pointee) | |
1627 | { | |
1628 | sym->ts.type = current_ts.type; | |
1629 | sym->ts.kind = current_ts.kind; | |
1630 | sym->ts.cl = cl; | |
1631 | sym->ts.derived = current_ts.derived; | |
c5d33754 | 1632 | sym->ts.is_c_interop = current_ts.is_c_interop; |
1633 | sym->ts.is_iso_c = current_ts.is_iso_c; | |
b549d2a5 | 1634 | m = MATCH_YES; |
1635 | ||
1636 | /* Check to see if we have an array specification. */ | |
1637 | if (cp_as != NULL) | |
1638 | { | |
1639 | if (sym->as != NULL) | |
1640 | { | |
7698a624 | 1641 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 1642 | gfc_free_array_spec (cp_as); |
1643 | m = MATCH_ERROR; | |
1644 | goto cleanup; | |
1645 | } | |
1646 | else | |
1647 | { | |
1648 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1649 | gfc_internal_error ("Couldn't set pointee array spec."); | |
e14bee04 | 1650 | |
b549d2a5 | 1651 | /* Fix the array spec. */ |
e14bee04 | 1652 | m = gfc_mod_pointee_as (sym->as); |
b549d2a5 | 1653 | if (m == MATCH_ERROR) |
1654 | goto cleanup; | |
1655 | } | |
e14bee04 | 1656 | } |
b549d2a5 | 1657 | goto cleanup; |
1658 | } | |
1659 | else | |
1660 | { | |
1661 | gfc_free_array_spec (cp_as); | |
1662 | } | |
1663 | } | |
e14bee04 | 1664 | |
1e057e9b | 1665 | /* Procedure pointer as function result. */ |
1666 | if (gfc_current_state () == COMP_FUNCTION | |
1667 | && strcmp ("ppr@", gfc_current_block ()->name) == 0 | |
1668 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0) | |
1669 | strcpy (name, "ppr@"); | |
1670 | ||
1671 | if (gfc_current_state () == COMP_FUNCTION | |
1672 | && strcmp (name, gfc_current_block ()->name) == 0 | |
1673 | && gfc_current_block ()->result | |
1674 | && strcmp ("ppr@", gfc_current_block ()->result->name) == 0) | |
1675 | strcpy (name, "ppr@"); | |
e14bee04 | 1676 | |
4ee9c684 | 1677 | /* OK, we've successfully matched the declaration. Now put the |
1678 | symbol in the current namespace, because it might be used in the | |
fe06c0d5 | 1679 | optional initialization expression for this symbol, e.g. this is |
4ee9c684 | 1680 | perfectly legal: |
1681 | ||
1682 | integer, parameter :: i = huge(i) | |
1683 | ||
1684 | This is only true for parameters or variables of a basic type. | |
1685 | For components of derived types, it is not true, so we don't | |
1686 | create a symbol for those yet. If we fail to create the symbol, | |
1687 | bail out. */ | |
1688 | if (gfc_current_state () != COMP_DERIVED | |
1689 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1690 | { | |
b8a51d79 | 1691 | m = MATCH_ERROR; |
1692 | goto cleanup; | |
1693 | } | |
1694 | ||
60fbbf9e | 1695 | /* An interface body specifies all of the procedure's |
1696 | characteristics and these shall be consistent with those | |
1697 | specified in the procedure definition, except that the interface | |
1698 | may specify a procedure that is not pure if the procedure is | |
1699 | defined to be pure(12.3.2). */ | |
b8a51d79 | 1700 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1701 | && gfc_current_ns->proc_name |
1702 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
c723595c | 1703 | && current_ts.derived->ns != gfc_current_ns) |
1704 | { | |
1705 | gfc_symtree *st; | |
1706 | st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.derived->name); | |
1707 | if (!(current_ts.derived->attr.imported | |
1708 | && st != NULL | |
1709 | && st->n.sym == current_ts.derived) | |
1710 | && !gfc_current_ns->has_import_set) | |
1711 | { | |
1712 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1713 | "interface", name); | |
1714 | m = MATCH_ERROR; | |
1715 | goto cleanup; | |
1716 | } | |
4ee9c684 | 1717 | } |
1718 | ||
1719 | /* In functions that have a RESULT variable defined, the function | |
1720 | name always refers to function calls. Therefore, the name is | |
1721 | not allowed to appear in specification statements. */ | |
1722 | if (gfc_current_state () == COMP_FUNCTION | |
1723 | && gfc_current_block () != NULL | |
1724 | && gfc_current_block ()->result != NULL | |
1725 | && gfc_current_block ()->result != gfc_current_block () | |
1726 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1727 | { | |
1728 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1729 | m = MATCH_ERROR; | |
1730 | goto cleanup; | |
1731 | } | |
1732 | ||
b4f45d02 | 1733 | /* We allow old-style initializations of the form |
1734 | integer i /2/, j(4) /3*3, 1/ | |
1735 | (if no colon has been seen). These are different from data | |
1736 | statements in that initializers are only allowed to apply to the | |
1737 | variable immediately preceding, i.e. | |
1738 | integer i, j /1, 2/ | |
1739 | is not allowed. Therefore we have to do some work manually, that | |
cca3db55 | 1740 | could otherwise be left to the matchers for DATA statements. */ |
b4f45d02 | 1741 | |
1742 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1743 | { | |
1744 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1745 | "initialization at %C") == FAILURE) | |
1746 | return MATCH_ERROR; | |
e14bee04 | 1747 | |
b4f45d02 | 1748 | return match_old_style_init (name); |
1749 | } | |
1750 | ||
4ee9c684 | 1751 | /* The double colon must be present in order to have initializers. |
1752 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1753 | if (colon_seen) | |
1754 | { | |
1755 | if (gfc_match (" =>") == MATCH_YES) | |
1756 | { | |
4ee9c684 | 1757 | if (!current_attr.pointer) |
1758 | { | |
1759 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1760 | m = MATCH_ERROR; | |
1761 | goto cleanup; | |
1762 | } | |
1763 | ||
1764 | m = gfc_match_null (&initializer); | |
1765 | if (m == MATCH_NO) | |
1766 | { | |
e4789c62 | 1767 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
4ee9c684 | 1768 | m = MATCH_ERROR; |
1769 | } | |
1770 | ||
1771 | if (gfc_pure (NULL)) | |
1772 | { | |
1a9745d2 | 1773 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1774 | "a PURE procedure"); | |
4ee9c684 | 1775 | m = MATCH_ERROR; |
1776 | } | |
1777 | ||
1778 | if (m != MATCH_YES) | |
1779 | goto cleanup; | |
1780 | ||
4ee9c684 | 1781 | } |
1782 | else if (gfc_match_char ('=') == MATCH_YES) | |
1783 | { | |
1784 | if (current_attr.pointer) | |
1785 | { | |
1a9745d2 | 1786 | gfc_error ("Pointer initialization at %C requires '=>', " |
1787 | "not '='"); | |
4ee9c684 | 1788 | m = MATCH_ERROR; |
1789 | goto cleanup; | |
1790 | } | |
1791 | ||
1792 | m = gfc_match_init_expr (&initializer); | |
1793 | if (m == MATCH_NO) | |
1794 | { | |
1795 | gfc_error ("Expected an initialization expression at %C"); | |
1796 | m = MATCH_ERROR; | |
1797 | } | |
1798 | ||
1799 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1800 | { | |
1a9745d2 | 1801 | gfc_error ("Initialization of variable at %C is not allowed in " |
1802 | "a PURE procedure"); | |
4ee9c684 | 1803 | m = MATCH_ERROR; |
1804 | } | |
1805 | ||
1806 | if (m != MATCH_YES) | |
1807 | goto cleanup; | |
1808 | } | |
8ffad0f9 | 1809 | } |
1810 | ||
2294b616 | 1811 | if (initializer != NULL && current_attr.allocatable |
1812 | && gfc_current_state () == COMP_DERIVED) | |
1813 | { | |
1a9745d2 | 1814 | gfc_error ("Initialization of allocatable component at %C is not " |
1815 | "allowed"); | |
2294b616 | 1816 | m = MATCH_ERROR; |
1817 | goto cleanup; | |
1818 | } | |
1819 | ||
d9b3f26b | 1820 | /* Add the initializer. Note that it is fine if initializer is |
4ee9c684 | 1821 | NULL here, because we sometimes also need to check if a |
1822 | declaration *must* have an initialization expression. */ | |
1823 | if (gfc_current_state () != COMP_DERIVED) | |
1824 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1825 | else | |
d9b3f26b | 1826 | { |
2294b616 | 1827 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1828 | && !current_attr.pointer && !initializer) |
d9b3f26b | 1829 | initializer = gfc_default_initializer (¤t_ts); |
1830 | t = build_struct (name, cl, &initializer, &as); | |
1831 | } | |
4ee9c684 | 1832 | |
1833 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1834 | ||
1835 | cleanup: | |
1836 | /* Free stuff up and return. */ | |
1837 | gfc_free_expr (initializer); | |
1838 | gfc_free_array_spec (as); | |
1839 | ||
1840 | return m; | |
1841 | } | |
1842 | ||
1843 | ||
d10f89ee | 1844 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
1845 | This assumes that the byte size is equal to the kind number for | |
1846 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
4ee9c684 | 1847 | |
1848 | match | |
1a9745d2 | 1849 | gfc_match_old_kind_spec (gfc_typespec *ts) |
4ee9c684 | 1850 | { |
1851 | match m; | |
3bd3b616 | 1852 | int original_kind; |
4ee9c684 | 1853 | |
1854 | if (gfc_match_char ('*') != MATCH_YES) | |
1855 | return MATCH_NO; | |
1856 | ||
3bd3b616 | 1857 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
4ee9c684 | 1858 | if (m != MATCH_YES) |
1859 | return MATCH_ERROR; | |
1860 | ||
b118a35b | 1861 | original_kind = ts->kind; |
1862 | ||
4ee9c684 | 1863 | /* Massage the kind numbers for complex types. */ |
b118a35b | 1864 | if (ts->type == BT_COMPLEX) |
1865 | { | |
1866 | if (ts->kind % 2) | |
1a9745d2 | 1867 | { |
1868 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1869 | gfc_basic_typename (ts->type), original_kind); | |
1870 | return MATCH_ERROR; | |
1871 | } | |
b118a35b | 1872 | ts->kind /= 2; |
1873 | } | |
4ee9c684 | 1874 | |
f2d4ef3b | 1875 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1876 | { |
b118a35b | 1877 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
1a9745d2 | 1878 | gfc_basic_typename (ts->type), original_kind); |
4ee9c684 | 1879 | return MATCH_ERROR; |
1880 | } | |
1881 | ||
be7f01a1 | 1882 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
1883 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1884 | return MATCH_ERROR; | |
1885 | ||
4ee9c684 | 1886 | return MATCH_YES; |
1887 | } | |
1888 | ||
1889 | ||
1890 | /* Match a kind specification. Since kinds are generally optional, we | |
1891 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1892 | string is found, then we know we have an error. */ | |
1893 | ||
1894 | match | |
67a51c8e | 1895 | gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only) |
4ee9c684 | 1896 | { |
67a51c8e | 1897 | locus where, loc; |
4ee9c684 | 1898 | gfc_expr *e; |
1899 | match m, n; | |
c632ff3d | 1900 | char c; |
4ee9c684 | 1901 | const char *msg; |
1902 | ||
1903 | m = MATCH_NO; | |
67a51c8e | 1904 | n = MATCH_YES; |
4ee9c684 | 1905 | e = NULL; |
1906 | ||
67a51c8e | 1907 | where = loc = gfc_current_locus; |
1908 | ||
1909 | if (kind_expr_only) | |
1910 | goto kind_expr; | |
4ee9c684 | 1911 | |
1912 | if (gfc_match_char ('(') == MATCH_NO) | |
1913 | return MATCH_NO; | |
1914 | ||
1915 | /* Also gobbles optional text. */ | |
1916 | if (gfc_match (" kind = ") == MATCH_YES) | |
1917 | m = MATCH_ERROR; | |
1918 | ||
67a51c8e | 1919 | loc = gfc_current_locus; |
1920 | ||
1921 | kind_expr: | |
4ee9c684 | 1922 | n = gfc_match_init_expr (&e); |
67a51c8e | 1923 | |
4ee9c684 | 1924 | if (n != MATCH_YES) |
67a51c8e | 1925 | { |
077932f9 | 1926 | if (gfc_matching_function) |
67a51c8e | 1927 | { |
077932f9 | 1928 | /* The function kind expression might include use associated or |
1929 | imported parameters and try again after the specification | |
1930 | expressions..... */ | |
67a51c8e | 1931 | if (gfc_match_char (')') != MATCH_YES) |
1932 | { | |
1933 | gfc_error ("Missing right parenthesis at %C"); | |
1934 | m = MATCH_ERROR; | |
1935 | goto no_match; | |
1936 | } | |
1937 | ||
1938 | gfc_free_expr (e); | |
67a51c8e | 1939 | gfc_undo_symbols (); |
1940 | return MATCH_YES; | |
1941 | } | |
1942 | else | |
1943 | { | |
1944 | /* ....or else, the match is real. */ | |
1945 | if (n == MATCH_NO) | |
1946 | gfc_error ("Expected initialization expression at %C"); | |
1947 | if (n != MATCH_YES) | |
1948 | return MATCH_ERROR; | |
1949 | } | |
1950 | } | |
4ee9c684 | 1951 | |
1952 | if (e->rank != 0) | |
1953 | { | |
1954 | gfc_error ("Expected scalar initialization expression at %C"); | |
1955 | m = MATCH_ERROR; | |
1956 | goto no_match; | |
1957 | } | |
1958 | ||
1959 | msg = gfc_extract_int (e, &ts->kind); | |
077932f9 | 1960 | |
4ee9c684 | 1961 | if (msg != NULL) |
1962 | { | |
1963 | gfc_error (msg); | |
1964 | m = MATCH_ERROR; | |
1965 | goto no_match; | |
1966 | } | |
1967 | ||
c5d33754 | 1968 | /* Before throwing away the expression, let's see if we had a |
1969 | C interoperable kind (and store the fact). */ | |
1970 | if (e->ts.is_c_interop == 1) | |
1971 | { | |
1972 | /* Mark this as c interoperable if being declared with one | |
1973 | of the named constants from iso_c_binding. */ | |
1974 | ts->is_c_interop = e->ts.is_iso_c; | |
1975 | ts->f90_type = e->ts.f90_type; | |
1976 | } | |
1977 | ||
4ee9c684 | 1978 | gfc_free_expr (e); |
1979 | e = NULL; | |
1980 | ||
c5d33754 | 1981 | /* Ignore errors to this point, if we've gotten here. This means |
1982 | we ignore the m=MATCH_ERROR from above. */ | |
f2d4ef3b | 1983 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1984 | { |
1985 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
1986 | gfc_basic_typename (ts->type)); | |
c632ff3d | 1987 | gfc_current_locus = where; |
1988 | return MATCH_ERROR; | |
4ee9c684 | 1989 | } |
c632ff3d | 1990 | |
209d3778 | 1991 | /* Warn if, e.g., c_int is used for a REAL variable, but not |
1992 | if, e.g., c_double is used for COMPLEX as the standard | |
1993 | explicitly says that the kind type parameter for complex and real | |
1994 | variable is the same, i.e. c_float == c_float_complex. */ | |
1995 | if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type | |
1996 | && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX) | |
1997 | || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL))) | |
ded233a6 | 1998 | gfc_warning_now ("C kind type parameter is for type %s but type at %L " |
1999 | "is %s", gfc_basic_typename (ts->f90_type), &where, | |
2000 | gfc_basic_typename (ts->type)); | |
209d3778 | 2001 | |
c632ff3d | 2002 | gfc_gobble_whitespace (); |
e0be6f02 | 2003 | if ((c = gfc_next_ascii_char ()) != ')' |
2004 | && (ts->type != BT_CHARACTER || c != ',')) | |
4ee9c684 | 2005 | { |
c632ff3d | 2006 | if (ts->type == BT_CHARACTER) |
2007 | gfc_error ("Missing right parenthesis or comma at %C"); | |
2008 | else | |
2009 | gfc_error ("Missing right parenthesis at %C"); | |
67a51c8e | 2010 | m = MATCH_ERROR; |
4ee9c684 | 2011 | } |
c5d33754 | 2012 | else |
2013 | /* All tests passed. */ | |
2014 | m = MATCH_YES; | |
4ee9c684 | 2015 | |
c5d33754 | 2016 | if(m == MATCH_ERROR) |
2017 | gfc_current_locus = where; | |
2018 | ||
2019 | /* Return what we know from the test(s). */ | |
2020 | return m; | |
4ee9c684 | 2021 | |
2022 | no_match: | |
2023 | gfc_free_expr (e); | |
cbb9e6aa | 2024 | gfc_current_locus = where; |
4ee9c684 | 2025 | return m; |
2026 | } | |
2027 | ||
2028 | ||
33399208 | 2029 | static match |
2030 | match_char_kind (int * kind, int * is_iso_c) | |
2031 | { | |
2032 | locus where; | |
2033 | gfc_expr *e; | |
2034 | match m, n; | |
2035 | const char *msg; | |
2036 | ||
2037 | m = MATCH_NO; | |
2038 | e = NULL; | |
2039 | where = gfc_current_locus; | |
2040 | ||
2041 | n = gfc_match_init_expr (&e); | |
c632ff3d | 2042 | |
077932f9 | 2043 | if (n != MATCH_YES && gfc_matching_function) |
c632ff3d | 2044 | { |
077932f9 | 2045 | /* The expression might include use-associated or imported |
2046 | parameters and try again after the specification | |
2047 | expressions. */ | |
c632ff3d | 2048 | gfc_free_expr (e); |
c632ff3d | 2049 | gfc_undo_symbols (); |
2050 | return MATCH_YES; | |
2051 | } | |
2052 | ||
33399208 | 2053 | if (n == MATCH_NO) |
2054 | gfc_error ("Expected initialization expression at %C"); | |
2055 | if (n != MATCH_YES) | |
2056 | return MATCH_ERROR; | |
2057 | ||
2058 | if (e->rank != 0) | |
2059 | { | |
2060 | gfc_error ("Expected scalar initialization expression at %C"); | |
2061 | m = MATCH_ERROR; | |
2062 | goto no_match; | |
2063 | } | |
2064 | ||
2065 | msg = gfc_extract_int (e, kind); | |
2066 | *is_iso_c = e->ts.is_iso_c; | |
2067 | if (msg != NULL) | |
2068 | { | |
2069 | gfc_error (msg); | |
2070 | m = MATCH_ERROR; | |
2071 | goto no_match; | |
2072 | } | |
2073 | ||
2074 | gfc_free_expr (e); | |
2075 | ||
2076 | /* Ignore errors to this point, if we've gotten here. This means | |
2077 | we ignore the m=MATCH_ERROR from above. */ | |
2078 | if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0) | |
2079 | { | |
2080 | gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind); | |
2081 | m = MATCH_ERROR; | |
2082 | } | |
2083 | else | |
2084 | /* All tests passed. */ | |
2085 | m = MATCH_YES; | |
2086 | ||
2087 | if (m == MATCH_ERROR) | |
2088 | gfc_current_locus = where; | |
2089 | ||
2090 | /* Return what we know from the test(s). */ | |
2091 | return m; | |
2092 | ||
2093 | no_match: | |
2094 | gfc_free_expr (e); | |
2095 | gfc_current_locus = where; | |
2096 | return m; | |
2097 | } | |
2098 | ||
4ee9c684 | 2099 | /* Match the various kind/length specifications in a CHARACTER |
2100 | declaration. We don't return MATCH_NO. */ | |
2101 | ||
2102 | static match | |
1a9745d2 | 2103 | match_char_spec (gfc_typespec *ts) |
4ee9c684 | 2104 | { |
33399208 | 2105 | int kind, seen_length, is_iso_c; |
4ee9c684 | 2106 | gfc_charlen *cl; |
2107 | gfc_expr *len; | |
2108 | match m; | |
33399208 | 2109 | |
4ee9c684 | 2110 | len = NULL; |
2111 | seen_length = 0; | |
33399208 | 2112 | kind = 0; |
2113 | is_iso_c = 0; | |
4ee9c684 | 2114 | |
2115 | /* Try the old-style specification first. */ | |
2116 | old_char_selector = 0; | |
2117 | ||
2118 | m = match_char_length (&len); | |
2119 | if (m != MATCH_NO) | |
2120 | { | |
2121 | if (m == MATCH_YES) | |
2122 | old_char_selector = 1; | |
2123 | seen_length = 1; | |
2124 | goto done; | |
2125 | } | |
2126 | ||
2127 | m = gfc_match_char ('('); | |
2128 | if (m != MATCH_YES) | |
2129 | { | |
c5d33754 | 2130 | m = MATCH_YES; /* Character without length is a single char. */ |
4ee9c684 | 2131 | goto done; |
2132 | } | |
2133 | ||
c5d33754 | 2134 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ |
4ee9c684 | 2135 | if (gfc_match (" kind =") == MATCH_YES) |
2136 | { | |
33399208 | 2137 | m = match_char_kind (&kind, &is_iso_c); |
c5d33754 | 2138 | |
4ee9c684 | 2139 | if (m == MATCH_ERROR) |
2140 | goto done; | |
2141 | if (m == MATCH_NO) | |
2142 | goto syntax; | |
2143 | ||
2144 | if (gfc_match (" , len =") == MATCH_NO) | |
2145 | goto rparen; | |
2146 | ||
2147 | m = char_len_param_value (&len); | |
2148 | if (m == MATCH_NO) | |
2149 | goto syntax; | |
2150 | if (m == MATCH_ERROR) | |
2151 | goto done; | |
2152 | seen_length = 1; | |
2153 | ||
2154 | goto rparen; | |
2155 | } | |
2156 | ||
f6d0e37a | 2157 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ |
4ee9c684 | 2158 | if (gfc_match (" len =") == MATCH_YES) |
2159 | { | |
2160 | m = char_len_param_value (&len); | |
2161 | if (m == MATCH_NO) | |
2162 | goto syntax; | |
2163 | if (m == MATCH_ERROR) | |
2164 | goto done; | |
2165 | seen_length = 1; | |
2166 | ||
2167 | if (gfc_match_char (')') == MATCH_YES) | |
2168 | goto done; | |
2169 | ||
2170 | if (gfc_match (" , kind =") != MATCH_YES) | |
2171 | goto syntax; | |
2172 | ||
33399208 | 2173 | if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR) |
2174 | goto done; | |
4ee9c684 | 2175 | |
2176 | goto rparen; | |
2177 | } | |
2178 | ||
f6d0e37a | 2179 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
4ee9c684 | 2180 | m = char_len_param_value (&len); |
2181 | if (m == MATCH_NO) | |
2182 | goto syntax; | |
2183 | if (m == MATCH_ERROR) | |
2184 | goto done; | |
2185 | seen_length = 1; | |
2186 | ||
2187 | m = gfc_match_char (')'); | |
2188 | if (m == MATCH_YES) | |
2189 | goto done; | |
2190 | ||
2191 | if (gfc_match_char (',') != MATCH_YES) | |
2192 | goto syntax; | |
2193 | ||
c5d33754 | 2194 | gfc_match (" kind ="); /* Gobble optional text. */ |
4ee9c684 | 2195 | |
33399208 | 2196 | m = match_char_kind (&kind, &is_iso_c); |
4ee9c684 | 2197 | if (m == MATCH_ERROR) |
2198 | goto done; | |
2199 | if (m == MATCH_NO) | |
2200 | goto syntax; | |
2201 | ||
2202 | rparen: | |
2203 | /* Require a right-paren at this point. */ | |
2204 | m = gfc_match_char (')'); | |
2205 | if (m == MATCH_YES) | |
2206 | goto done; | |
2207 | ||
2208 | syntax: | |
2209 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
2210 | m = MATCH_ERROR; | |
a3cbe8cc | 2211 | gfc_free_expr (len); |
2212 | return m; | |
4ee9c684 | 2213 | |
2214 | done: | |
8d39570e | 2215 | /* Deal with character functions after USE and IMPORT statements. */ |
2216 | if (gfc_matching_function) | |
077932f9 | 2217 | { |
8d39570e | 2218 | gfc_free_expr (len); |
077932f9 | 2219 | gfc_undo_symbols (); |
2220 | return MATCH_YES; | |
2221 | } | |
2222 | ||
4ee9c684 | 2223 | if (m != MATCH_YES) |
2224 | { | |
2225 | gfc_free_expr (len); | |
2226 | return m; | |
2227 | } | |
2228 | ||
2229 | /* Do some final massaging of the length values. */ | |
5d50997a | 2230 | cl = gfc_new_charlen (gfc_current_ns); |
4ee9c684 | 2231 | |
2232 | if (seen_length == 0) | |
2233 | cl->length = gfc_int_expr (1); | |
2234 | else | |
2fe2caa6 | 2235 | cl->length = len; |
4ee9c684 | 2236 | |
2237 | ts->cl = cl; | |
33399208 | 2238 | ts->kind = kind == 0 ? gfc_default_character_kind : kind; |
4ee9c684 | 2239 | |
c5d33754 | 2240 | /* We have to know if it was a c interoperable kind so we can |
2241 | do accurate type checking of bind(c) procs, etc. */ | |
33399208 | 2242 | if (kind != 0) |
2243 | /* Mark this as c interoperable if being declared with one | |
2244 | of the named constants from iso_c_binding. */ | |
2245 | ts->is_c_interop = is_iso_c; | |
c5d33754 | 2246 | else if (len != NULL) |
33399208 | 2247 | /* Here, we might have parsed something such as: character(c_char) |
2248 | In this case, the parsing code above grabs the c_char when | |
2249 | looking for the length (line 1690, roughly). it's the last | |
2250 | testcase for parsing the kind params of a character variable. | |
2251 | However, it's not actually the length. this seems like it | |
2252 | could be an error. | |
2253 | To see if the user used a C interop kind, test the expr | |
2254 | of the so called length, and see if it's C interoperable. */ | |
2255 | ts->is_c_interop = len->ts.is_iso_c; | |
c5d33754 | 2256 | |
4ee9c684 | 2257 | return MATCH_YES; |
2258 | } | |
2259 | ||
2260 | ||
2261 | /* Matches a type specification. If successful, sets the ts structure | |
2262 | to the matched specification. This is necessary for FUNCTION and | |
2263 | IMPLICIT statements. | |
2264 | ||
e14bee04 | 2265 | If implicit_flag is nonzero, then we don't check for the optional |
39351103 | 2266 | kind specification. Not doing so is needed for matching an IMPLICIT |
4ee9c684 | 2267 | statement correctly. */ |
2268 | ||
67a51c8e | 2269 | match |
2270 | gfc_match_type_spec (gfc_typespec *ts, int implicit_flag) | |
4ee9c684 | 2271 | { |
2272 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2273 | gfc_symbol *sym; | |
2274 | match m; | |
e0be6f02 | 2275 | char c; |
077932f9 | 2276 | bool seen_deferred_kind; |
4ee9c684 | 2277 | |
077932f9 | 2278 | /* A belt and braces check that the typespec is correctly being treated |
2279 | as a deferred characteristic association. */ | |
2280 | seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION) | |
8d39570e | 2281 | && (gfc_current_block ()->result->ts.kind == -1) |
2282 | && (ts->kind == -1); | |
4ee9c684 | 2283 | gfc_clear_ts (ts); |
077932f9 | 2284 | if (seen_deferred_kind) |
2285 | ts->kind = -1; | |
4ee9c684 | 2286 | |
c5d33754 | 2287 | /* Clear the current binding label, in case one is given. */ |
2288 | curr_binding_label[0] = '\0'; | |
2289 | ||
25b29122 | 2290 | if (gfc_match (" byte") == MATCH_YES) |
2291 | { | |
e14bee04 | 2292 | if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C") |
25b29122 | 2293 | == FAILURE) |
2294 | return MATCH_ERROR; | |
2295 | ||
2296 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
2297 | { | |
2298 | gfc_error ("BYTE type used at %C " | |
2299 | "is not available on the target machine"); | |
2300 | return MATCH_ERROR; | |
2301 | } | |
e14bee04 | 2302 | |
25b29122 | 2303 | ts->type = BT_INTEGER; |
2304 | ts->kind = 1; | |
2305 | return MATCH_YES; | |
2306 | } | |
2307 | ||
4ee9c684 | 2308 | if (gfc_match (" integer") == MATCH_YES) |
2309 | { | |
2310 | ts->type = BT_INTEGER; | |
b8a891cb | 2311 | ts->kind = gfc_default_integer_kind; |
4ee9c684 | 2312 | goto get_kind; |
2313 | } | |
2314 | ||
2315 | if (gfc_match (" character") == MATCH_YES) | |
2316 | { | |
2317 | ts->type = BT_CHARACTER; | |
39351103 | 2318 | if (implicit_flag == 0) |
2319 | return match_char_spec (ts); | |
2320 | else | |
2321 | return MATCH_YES; | |
4ee9c684 | 2322 | } |
2323 | ||
2324 | if (gfc_match (" real") == MATCH_YES) | |
2325 | { | |
2326 | ts->type = BT_REAL; | |
b8a891cb | 2327 | ts->kind = gfc_default_real_kind; |
4ee9c684 | 2328 | goto get_kind; |
2329 | } | |
2330 | ||
2331 | if (gfc_match (" double precision") == MATCH_YES) | |
2332 | { | |
2333 | ts->type = BT_REAL; | |
b8a891cb | 2334 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2335 | return MATCH_YES; |
2336 | } | |
2337 | ||
2338 | if (gfc_match (" complex") == MATCH_YES) | |
2339 | { | |
2340 | ts->type = BT_COMPLEX; | |
b8a891cb | 2341 | ts->kind = gfc_default_complex_kind; |
4ee9c684 | 2342 | goto get_kind; |
2343 | } | |
2344 | ||
2345 | if (gfc_match (" double complex") == MATCH_YES) | |
2346 | { | |
be7f01a1 | 2347 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
2348 | "conform to the Fortran 95 standard") == FAILURE) | |
2349 | return MATCH_ERROR; | |
2350 | ||
4ee9c684 | 2351 | ts->type = BT_COMPLEX; |
b8a891cb | 2352 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2353 | return MATCH_YES; |
2354 | } | |
2355 | ||
2356 | if (gfc_match (" logical") == MATCH_YES) | |
2357 | { | |
2358 | ts->type = BT_LOGICAL; | |
b8a891cb | 2359 | ts->kind = gfc_default_logical_kind; |
4ee9c684 | 2360 | goto get_kind; |
2361 | } | |
2362 | ||
2363 | m = gfc_match (" type ( %n )", name); | |
2364 | if (m != MATCH_YES) | |
2365 | return m; | |
2366 | ||
077932f9 | 2367 | ts->type = BT_DERIVED; |
2368 | ||
2369 | /* Defer association of the derived type until the end of the | |
2370 | specification block. However, if the derived type can be | |
2371 | found, add it to the typespec. */ | |
2372 | if (gfc_matching_function) | |
67a51c8e | 2373 | { |
077932f9 | 2374 | ts->derived = NULL; |
2375 | if (gfc_current_state () != COMP_INTERFACE | |
2376 | && !gfc_find_symbol (name, NULL, 1, &sym) && sym) | |
2377 | ts->derived = sym; | |
67a51c8e | 2378 | return MATCH_YES; |
2379 | } | |
2380 | ||
2381 | /* Search for the name but allow the components to be defined later. If | |
2382 | type = -1, this typespec has been seen in a function declaration but | |
077932f9 | 2383 | the type could not be accessed at that point. */ |
2384 | sym = NULL; | |
67a51c8e | 2385 | if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym)) |
4ee9c684 | 2386 | { |
2387 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2388 | return MATCH_ERROR; | |
2389 | } | |
67a51c8e | 2390 | else if (ts->kind == -1) |
2391 | { | |
077932f9 | 2392 | int iface = gfc_state_stack->previous->state != COMP_INTERFACE |
2393 | || gfc_current_ns->has_import_set; | |
2394 | if (gfc_find_symbol (name, NULL, iface, &sym)) | |
67a51c8e | 2395 | { |
2396 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2397 | return MATCH_ERROR; | |
2398 | } | |
2399 | ||
077932f9 | 2400 | ts->kind = 0; |
67a51c8e | 2401 | if (sym == NULL) |
2402 | return MATCH_NO; | |
2403 | } | |
4ee9c684 | 2404 | |
2405 | if (sym->attr.flavor != FL_DERIVED | |
950683ed | 2406 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 2407 | return MATCH_ERROR; |
2408 | ||
077932f9 | 2409 | gfc_set_sym_referenced (sym); |
4ee9c684 | 2410 | ts->derived = sym; |
2411 | ||
2412 | return MATCH_YES; | |
2413 | ||
2414 | get_kind: | |
2415 | /* For all types except double, derived and character, look for an | |
2416 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
39351103 | 2417 | if (implicit_flag == 1) |
4ee9c684 | 2418 | return MATCH_YES; |
2419 | ||
18f3698a | 2420 | if (gfc_current_form == FORM_FREE) |
2421 | { | |
e0be6f02 | 2422 | c = gfc_peek_ascii_char(); |
18f3698a | 2423 | if (!gfc_is_whitespace(c) && c != '*' && c != '(' |
1a9745d2 | 2424 | && c != ':' && c != ',') |
18f3698a | 2425 | return MATCH_NO; |
2426 | } | |
2427 | ||
67a51c8e | 2428 | m = gfc_match_kind_spec (ts, false); |
4ee9c684 | 2429 | if (m == MATCH_NO && ts->type != BT_CHARACTER) |
2430 | m = gfc_match_old_kind_spec (ts); | |
2431 | ||
077932f9 | 2432 | /* Defer association of the KIND expression of function results |
2433 | until after USE and IMPORT statements. */ | |
2434 | if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ()) | |
2435 | || gfc_matching_function) | |
2436 | return MATCH_YES; | |
2437 | ||
4ee9c684 | 2438 | if (m == MATCH_NO) |
2439 | m = MATCH_YES; /* No kind specifier found. */ | |
2440 | ||
2441 | return m; | |
2442 | } | |
2443 | ||
2444 | ||
39351103 | 2445 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
2446 | already matched in parse.c, or we would not end up here in the | |
2447 | first place. So the only thing we need to check, is if there is | |
2448 | trailing garbage. If not, the match is successful. */ | |
2449 | ||
2450 | match | |
2451 | gfc_match_implicit_none (void) | |
2452 | { | |
39351103 | 2453 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
2454 | } | |
2455 | ||
2456 | ||
2457 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
2458 | ||
2459 | static match | |
b70528c7 | 2460 | match_implicit_range (void) |
39351103 | 2461 | { |
e0be6f02 | 2462 | char c, c1, c2; |
2463 | int inner; | |
39351103 | 2464 | locus cur_loc; |
2465 | ||
2466 | cur_loc = gfc_current_locus; | |
2467 | ||
2468 | gfc_gobble_whitespace (); | |
e0be6f02 | 2469 | c = gfc_next_ascii_char (); |
39351103 | 2470 | if (c != '(') |
2471 | { | |
2472 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
2473 | goto bad; | |
2474 | } | |
2475 | ||
2476 | inner = 1; | |
2477 | while (inner) | |
2478 | { | |
2479 | gfc_gobble_whitespace (); | |
e0be6f02 | 2480 | c1 = gfc_next_ascii_char (); |
39351103 | 2481 | if (!ISALPHA (c1)) |
2482 | goto bad; | |
2483 | ||
2484 | gfc_gobble_whitespace (); | |
e0be6f02 | 2485 | c = gfc_next_ascii_char (); |
39351103 | 2486 | |
2487 | switch (c) | |
2488 | { | |
2489 | case ')': | |
f6d0e37a | 2490 | inner = 0; /* Fall through. */ |
39351103 | 2491 | |
2492 | case ',': | |
2493 | c2 = c1; | |
2494 | break; | |
2495 | ||
2496 | case '-': | |
2497 | gfc_gobble_whitespace (); | |
e0be6f02 | 2498 | c2 = gfc_next_ascii_char (); |
39351103 | 2499 | if (!ISALPHA (c2)) |
2500 | goto bad; | |
2501 | ||
2502 | gfc_gobble_whitespace (); | |
e0be6f02 | 2503 | c = gfc_next_ascii_char (); |
39351103 | 2504 | |
2505 | if ((c != ',') && (c != ')')) | |
2506 | goto bad; | |
2507 | if (c == ')') | |
2508 | inner = 0; | |
2509 | ||
2510 | break; | |
2511 | ||
2512 | default: | |
2513 | goto bad; | |
2514 | } | |
2515 | ||
2516 | if (c1 > c2) | |
2517 | { | |
2518 | gfc_error ("Letters must be in alphabetic order in " | |
2519 | "IMPLICIT statement at %C"); | |
2520 | goto bad; | |
2521 | } | |
2522 | ||
2523 | /* See if we can add the newly matched range to the pending | |
1a9745d2 | 2524 | implicits from this IMPLICIT statement. We do not check for |
2525 | conflicts with whatever earlier IMPLICIT statements may have | |
2526 | set. This is done when we've successfully finished matching | |
2527 | the current one. */ | |
b70528c7 | 2528 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
39351103 | 2529 | goto bad; |
2530 | } | |
2531 | ||
2532 | return MATCH_YES; | |
2533 | ||
2534 | bad: | |
2535 | gfc_syntax_error (ST_IMPLICIT); | |
2536 | ||
2537 | gfc_current_locus = cur_loc; | |
2538 | return MATCH_ERROR; | |
2539 | } | |
2540 | ||
2541 | ||
2542 | /* Match an IMPLICIT statement, storing the types for | |
2543 | gfc_set_implicit() if the statement is accepted by the parser. | |
2544 | There is a strange looking, but legal syntactic construction | |
2545 | possible. It looks like: | |
2546 | ||
2547 | IMPLICIT INTEGER (a-b) (c-d) | |
2548 | ||
2549 | This is legal if "a-b" is a constant expression that happens to | |
2550 | equal one of the legal kinds for integers. The real problem | |
2551 | happens with an implicit specification that looks like: | |
2552 | ||
2553 | IMPLICIT INTEGER (a-b) | |
2554 | ||
2555 | In this case, a typespec matcher that is "greedy" (as most of the | |
2556 | matchers are) gobbles the character range as a kindspec, leaving | |
2557 | nothing left. We therefore have to go a bit more slowly in the | |
2558 | matching process by inhibiting the kindspec checking during | |
2559 | typespec matching and checking for a kind later. */ | |
2560 | ||
2561 | match | |
2562 | gfc_match_implicit (void) | |
2563 | { | |
2564 | gfc_typespec ts; | |
2565 | locus cur_loc; | |
e0be6f02 | 2566 | char c; |
39351103 | 2567 | match m; |
2568 | ||
52179f31 | 2569 | gfc_clear_ts (&ts); |
2570 | ||
39351103 | 2571 | /* We don't allow empty implicit statements. */ |
2572 | if (gfc_match_eos () == MATCH_YES) | |
2573 | { | |
2574 | gfc_error ("Empty IMPLICIT statement at %C"); | |
2575 | return MATCH_ERROR; | |
2576 | } | |
2577 | ||
39351103 | 2578 | do |
2579 | { | |
b70528c7 | 2580 | /* First cleanup. */ |
2581 | gfc_clear_new_implicit (); | |
2582 | ||
39351103 | 2583 | /* A basic type is mandatory here. */ |
67a51c8e | 2584 | m = gfc_match_type_spec (&ts, 1); |
39351103 | 2585 | if (m == MATCH_ERROR) |
2586 | goto error; | |
2587 | if (m == MATCH_NO) | |
2588 | goto syntax; | |
2589 | ||
2590 | cur_loc = gfc_current_locus; | |
b70528c7 | 2591 | m = match_implicit_range (); |
39351103 | 2592 | |
2593 | if (m == MATCH_YES) | |
2594 | { | |
b70528c7 | 2595 | /* We may have <TYPE> (<RANGE>). */ |
39351103 | 2596 | gfc_gobble_whitespace (); |
e0be6f02 | 2597 | c = gfc_next_ascii_char (); |
39351103 | 2598 | if ((c == '\n') || (c == ',')) |
b70528c7 | 2599 | { |
2600 | /* Check for CHARACTER with no length parameter. */ | |
2601 | if (ts.type == BT_CHARACTER && !ts.cl) | |
2602 | { | |
b8a891cb | 2603 | ts.kind = gfc_default_character_kind; |
5d50997a | 2604 | ts.cl = gfc_new_charlen (gfc_current_ns); |
b70528c7 | 2605 | ts.cl->length = gfc_int_expr (1); |
2606 | } | |
2607 | ||
2608 | /* Record the Successful match. */ | |
2609 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2610 | return MATCH_ERROR; | |
2611 | continue; | |
2612 | } | |
39351103 | 2613 | |
2614 | gfc_current_locus = cur_loc; | |
2615 | } | |
2616 | ||
b70528c7 | 2617 | /* Discard the (incorrectly) matched range. */ |
2618 | gfc_clear_new_implicit (); | |
2619 | ||
2620 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
2621 | if (ts.type == BT_CHARACTER) | |
2622 | m = match_char_spec (&ts); | |
2623 | else | |
39351103 | 2624 | { |
67a51c8e | 2625 | m = gfc_match_kind_spec (&ts, false); |
39351103 | 2626 | if (m == MATCH_NO) |
b70528c7 | 2627 | { |
2628 | m = gfc_match_old_kind_spec (&ts); | |
2629 | if (m == MATCH_ERROR) | |
2630 | goto error; | |
2631 | if (m == MATCH_NO) | |
2632 | goto syntax; | |
2633 | } | |
39351103 | 2634 | } |
b70528c7 | 2635 | if (m == MATCH_ERROR) |
2636 | goto error; | |
39351103 | 2637 | |
b70528c7 | 2638 | m = match_implicit_range (); |
39351103 | 2639 | if (m == MATCH_ERROR) |
2640 | goto error; | |
2641 | if (m == MATCH_NO) | |
2642 | goto syntax; | |
2643 | ||
2644 | gfc_gobble_whitespace (); | |
e0be6f02 | 2645 | c = gfc_next_ascii_char (); |
39351103 | 2646 | if ((c != '\n') && (c != ',')) |
2647 | goto syntax; | |
2648 | ||
b70528c7 | 2649 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2650 | return MATCH_ERROR; | |
39351103 | 2651 | } |
2652 | while (c == ','); | |
2653 | ||
b70528c7 | 2654 | return MATCH_YES; |
39351103 | 2655 | |
2656 | syntax: | |
2657 | gfc_syntax_error (ST_IMPLICIT); | |
2658 | ||
2659 | error: | |
2660 | return MATCH_ERROR; | |
2661 | } | |
2662 | ||
f6d0e37a | 2663 | |
d67fc9ae | 2664 | match |
2665 | gfc_match_import (void) | |
2666 | { | |
2667 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2668 | match m; | |
2669 | gfc_symbol *sym; | |
2670 | gfc_symtree *st; | |
2671 | ||
f6d0e37a | 2672 | if (gfc_current_ns->proc_name == NULL |
2673 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
d67fc9ae | 2674 | { |
2675 | gfc_error ("IMPORT statement at %C only permitted in " | |
2676 | "an INTERFACE body"); | |
2677 | return MATCH_ERROR; | |
2678 | } | |
2679 | ||
1a9745d2 | 2680 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
d67fc9ae | 2681 | == FAILURE) |
2682 | return MATCH_ERROR; | |
2683 | ||
2684 | if (gfc_match_eos () == MATCH_YES) | |
2685 | { | |
2686 | /* All host variables should be imported. */ | |
2687 | gfc_current_ns->has_import_set = 1; | |
2688 | return MATCH_YES; | |
2689 | } | |
2690 | ||
2691 | if (gfc_match (" ::") == MATCH_YES) | |
2692 | { | |
2693 | if (gfc_match_eos () == MATCH_YES) | |
1a9745d2 | 2694 | { |
2695 | gfc_error ("Expecting list of named entities at %C"); | |
2696 | return MATCH_ERROR; | |
2697 | } | |
d67fc9ae | 2698 | } |
2699 | ||
2700 | for(;;) | |
2701 | { | |
2702 | m = gfc_match (" %n", name); | |
2703 | switch (m) | |
2704 | { | |
2705 | case MATCH_YES: | |
096d4ad9 | 2706 | if (gfc_current_ns->parent != NULL |
f6d0e37a | 2707 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
096d4ad9 | 2708 | { |
2709 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2710 | return MATCH_ERROR; | |
2711 | } | |
2712 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
f6d0e37a | 2713 | && gfc_find_symbol (name, |
2714 | gfc_current_ns->proc_name->ns->parent, | |
2715 | 1, &sym)) | |
1a9745d2 | 2716 | { |
2717 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2718 | return MATCH_ERROR; | |
2719 | } | |
2720 | ||
2721 | if (sym == NULL) | |
2722 | { | |
2723 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2724 | "at %C - does not exist.", name); | |
2725 | return MATCH_ERROR; | |
2726 | } | |
2727 | ||
e14bee04 | 2728 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) |
1a9745d2 | 2729 | { |
2730 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2731 | "at %C.", name); | |
2732 | goto next_item; | |
2733 | } | |
2734 | ||
a15d1caf | 2735 | st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name); |
1a9745d2 | 2736 | st->n.sym = sym; |
2737 | sym->refs++; | |
c723595c | 2738 | sym->attr.imported = 1; |
d67fc9ae | 2739 | |
2740 | goto next_item; | |
2741 | ||
2742 | case MATCH_NO: | |
2743 | break; | |
2744 | ||
2745 | case MATCH_ERROR: | |
2746 | return MATCH_ERROR; | |
2747 | } | |
2748 | ||
2749 | next_item: | |
2750 | if (gfc_match_eos () == MATCH_YES) | |
2751 | break; | |
2752 | if (gfc_match_char (',') != MATCH_YES) | |
2753 | goto syntax; | |
2754 | } | |
2755 | ||
2756 | return MATCH_YES; | |
2757 | ||
2758 | syntax: | |
2759 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2760 | return MATCH_ERROR; | |
2761 | } | |
39351103 | 2762 | |
f6d0e37a | 2763 | |
c72e5f7e | 2764 | /* A minimal implementation of gfc_match without whitespace, escape |
2765 | characters or variable arguments. Returns true if the next | |
2766 | characters match the TARGET template exactly. */ | |
2767 | ||
2768 | static bool | |
2769 | match_string_p (const char *target) | |
2770 | { | |
2771 | const char *p; | |
2772 | ||
2773 | for (p = target; *p; p++) | |
e0be6f02 | 2774 | if ((char) gfc_next_ascii_char () != *p) |
c72e5f7e | 2775 | return false; |
2776 | return true; | |
2777 | } | |
2778 | ||
4ee9c684 | 2779 | /* Matches an attribute specification including array specs. If |
2780 | successful, leaves the variables current_attr and current_as | |
2781 | holding the specification. Also sets the colon_seen variable for | |
2782 | later use by matchers associated with initializations. | |
2783 | ||
2784 | This subroutine is a little tricky in the sense that we don't know | |
2785 | if we really have an attr-spec until we hit the double colon. | |
2786 | Until that time, we can only return MATCH_NO. This forces us to | |
2787 | check for duplicate specification at this level. */ | |
2788 | ||
2789 | static match | |
2790 | match_attr_spec (void) | |
2791 | { | |
4ee9c684 | 2792 | /* Modifiers that can exist in a type statement. */ |
2793 | typedef enum | |
2794 | { GFC_DECL_BEGIN = 0, | |
2795 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
2796 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
3ea52af3 | 2797 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
2798 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
c72e5f7e | 2799 | DECL_IS_BIND_C, DECL_NONE, |
4ee9c684 | 2800 | GFC_DECL_END /* Sentinel */ |
2801 | } | |
2802 | decl_types; | |
2803 | ||
2804 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
2805 | #define NUM_DECL GFC_DECL_END | |
2806 | ||
4ee9c684 | 2807 | locus start, seen_at[NUM_DECL]; |
2808 | int seen[NUM_DECL]; | |
9f1b7d17 | 2809 | unsigned int d; |
4ee9c684 | 2810 | const char *attr; |
2811 | match m; | |
f6bb8f4b | 2812 | gfc_try t; |
4ee9c684 | 2813 | |
2814 | gfc_clear_attr (¤t_attr); | |
cbb9e6aa | 2815 | start = gfc_current_locus; |
4ee9c684 | 2816 | |
2817 | current_as = NULL; | |
2818 | colon_seen = 0; | |
2819 | ||
2820 | /* See if we get all of the keywords up to the final double colon. */ | |
2821 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2822 | seen[d] = 0; | |
2823 | ||
2824 | for (;;) | |
2825 | { | |
e0be6f02 | 2826 | char ch; |
c5d33754 | 2827 | |
c72e5f7e | 2828 | d = DECL_NONE; |
2829 | gfc_gobble_whitespace (); | |
2830 | ||
e0be6f02 | 2831 | ch = gfc_next_ascii_char (); |
c72e5f7e | 2832 | if (ch == ':') |
2833 | { | |
2834 | /* This is the successful exit condition for the loop. */ | |
e0be6f02 | 2835 | if (gfc_next_ascii_char () == ':') |
c72e5f7e | 2836 | break; |
2837 | } | |
2838 | else if (ch == ',') | |
c5d33754 | 2839 | { |
c5d33754 | 2840 | gfc_gobble_whitespace (); |
e0be6f02 | 2841 | switch (gfc_peek_ascii_char ()) |
c5d33754 | 2842 | { |
c72e5f7e | 2843 | case 'a': |
2844 | if (match_string_p ("allocatable")) | |
2845 | d = DECL_ALLOCATABLE; | |
2846 | break; | |
2847 | ||
2848 | case 'b': | |
c5d33754 | 2849 | /* Try and match the bind(c). */ |
75ae7f6c | 2850 | m = gfc_match_bind_c (NULL, true); |
5cf92482 | 2851 | if (m == MATCH_YES) |
c5d33754 | 2852 | d = DECL_IS_BIND_C; |
5cf92482 | 2853 | else if (m == MATCH_ERROR) |
2854 | goto cleanup; | |
c72e5f7e | 2855 | break; |
2856 | ||
2857 | case 'd': | |
2858 | if (match_string_p ("dimension")) | |
2859 | d = DECL_DIMENSION; | |
2860 | break; | |
2861 | ||
2862 | case 'e': | |
2863 | if (match_string_p ("external")) | |
2864 | d = DECL_EXTERNAL; | |
2865 | break; | |
2866 | ||
2867 | case 'i': | |
2868 | if (match_string_p ("int")) | |
2869 | { | |
e0be6f02 | 2870 | ch = gfc_next_ascii_char (); |
c72e5f7e | 2871 | if (ch == 'e') |
2872 | { | |
2873 | if (match_string_p ("nt")) | |
2874 | { | |
2875 | /* Matched "intent". */ | |
2876 | /* TODO: Call match_intent_spec from here. */ | |
2877 | if (gfc_match (" ( in out )") == MATCH_YES) | |
2878 | d = DECL_INOUT; | |
2879 | else if (gfc_match (" ( in )") == MATCH_YES) | |
2880 | d = DECL_IN; | |
2881 | else if (gfc_match (" ( out )") == MATCH_YES) | |
2882 | d = DECL_OUT; | |
2883 | } | |
2884 | } | |
2885 | else if (ch == 'r') | |
2886 | { | |
2887 | if (match_string_p ("insic")) | |
2888 | { | |
2889 | /* Matched "intrinsic". */ | |
2890 | d = DECL_INTRINSIC; | |
2891 | } | |
2892 | } | |
2893 | } | |
2894 | break; | |
2895 | ||
2896 | case 'o': | |
2897 | if (match_string_p ("optional")) | |
2898 | d = DECL_OPTIONAL; | |
2899 | break; | |
2900 | ||
2901 | case 'p': | |
e0be6f02 | 2902 | gfc_next_ascii_char (); |
2903 | switch (gfc_next_ascii_char ()) | |
c72e5f7e | 2904 | { |
2905 | case 'a': | |
2906 | if (match_string_p ("rameter")) | |
2907 | { | |
2908 | /* Matched "parameter". */ | |
2909 | d = DECL_PARAMETER; | |
2910 | } | |
2911 | break; | |
2912 | ||
2913 | case 'o': | |
2914 | if (match_string_p ("inter")) | |
2915 | { | |
2916 | /* Matched "pointer". */ | |
2917 | d = DECL_POINTER; | |
2918 | } | |
2919 | break; | |
2920 | ||
2921 | case 'r': | |
e0be6f02 | 2922 | ch = gfc_next_ascii_char (); |
c72e5f7e | 2923 | if (ch == 'i') |
2924 | { | |
2925 | if (match_string_p ("vate")) | |
2926 | { | |
2927 | /* Matched "private". */ | |
2928 | d = DECL_PRIVATE; | |
2929 | } | |
2930 | } | |
2931 | else if (ch == 'o') | |
2932 | { | |
2933 | if (match_string_p ("tected")) | |
2934 | { | |
2935 | /* Matched "protected". */ | |
2936 | d = DECL_PROTECTED; | |
2937 | } | |
2938 | } | |
2939 | break; | |
2940 | ||
2941 | case 'u': | |
2942 | if (match_string_p ("blic")) | |
2943 | { | |
2944 | /* Matched "public". */ | |
2945 | d = DECL_PUBLIC; | |
2946 | } | |
2947 | break; | |
2948 | } | |
2949 | break; | |
2950 | ||
2951 | case 's': | |
2952 | if (match_string_p ("save")) | |
2953 | d = DECL_SAVE; | |
2954 | break; | |
2955 | ||
2956 | case 't': | |
2957 | if (match_string_p ("target")) | |
2958 | d = DECL_TARGET; | |
2959 | break; | |
2960 | ||
2961 | case 'v': | |
e0be6f02 | 2962 | gfc_next_ascii_char (); |
2963 | ch = gfc_next_ascii_char (); | |
c72e5f7e | 2964 | if (ch == 'a') |
2965 | { | |
2966 | if (match_string_p ("lue")) | |
2967 | { | |
2968 | /* Matched "value". */ | |
2969 | d = DECL_VALUE; | |
2970 | } | |
2971 | } | |
2972 | else if (ch == 'o') | |
2973 | { | |
2974 | if (match_string_p ("latile")) | |
2975 | { | |
2976 | /* Matched "volatile". */ | |
2977 | d = DECL_VOLATILE; | |
2978 | } | |
2979 | } | |
2980 | break; | |
c5d33754 | 2981 | } |
2982 | } | |
f3f9b222 | 2983 | |
c72e5f7e | 2984 | /* No double colon and no recognizable decl_type, so assume that |
2985 | we've been looking at something else the whole time. */ | |
2986 | if (d == DECL_NONE) | |
2987 | { | |
2988 | m = MATCH_NO; | |
2989 | goto cleanup; | |
2990 | } | |
e14bee04 | 2991 | |
7e221851 | 2992 | /* Check to make sure any parens are paired up correctly. */ |
2993 | if (gfc_match_parens () == MATCH_ERROR) | |
2994 | { | |
2995 | m = MATCH_ERROR; | |
2996 | goto cleanup; | |
2997 | } | |
2998 | ||
4ee9c684 | 2999 | seen[d]++; |
cbb9e6aa | 3000 | seen_at[d] = gfc_current_locus; |
4ee9c684 | 3001 | |
3002 | if (d == DECL_DIMENSION) | |
3003 | { | |
3004 | m = gfc_match_array_spec (¤t_as); | |
3005 | ||
3006 | if (m == MATCH_NO) | |
3007 | { | |
3008 | gfc_error ("Missing dimension specification at %C"); | |
3009 | m = MATCH_ERROR; | |
3010 | } | |
3011 | ||
3012 | if (m == MATCH_ERROR) | |
3013 | goto cleanup; | |
3014 | } | |
3015 | } | |
3016 | ||
4ee9c684 | 3017 | /* Since we've seen a double colon, we have to be looking at an |
3018 | attr-spec. This means that we can now issue errors. */ | |
3019 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3020 | if (seen[d] > 1) | |
3021 | { | |
3022 | switch (d) | |
3023 | { | |
3024 | case DECL_ALLOCATABLE: | |
3025 | attr = "ALLOCATABLE"; | |
3026 | break; | |
3027 | case DECL_DIMENSION: | |
3028 | attr = "DIMENSION"; | |
3029 | break; | |
3030 | case DECL_EXTERNAL: | |
3031 | attr = "EXTERNAL"; | |
3032 | break; | |
3033 | case DECL_IN: | |
3034 | attr = "INTENT (IN)"; | |
3035 | break; | |
3036 | case DECL_OUT: | |
3037 | attr = "INTENT (OUT)"; | |
3038 | break; | |
3039 | case DECL_INOUT: | |
3040 | attr = "INTENT (IN OUT)"; | |
3041 | break; | |
3042 | case DECL_INTRINSIC: | |
3043 | attr = "INTRINSIC"; | |
3044 | break; | |
3045 | case DECL_OPTIONAL: | |
3046 | attr = "OPTIONAL"; | |
3047 | break; | |
3048 | case DECL_PARAMETER: | |
3049 | attr = "PARAMETER"; | |
3050 | break; | |
3051 | case DECL_POINTER: | |
3052 | attr = "POINTER"; | |
3053 | break; | |
3ea52af3 | 3054 | case DECL_PROTECTED: |
3055 | attr = "PROTECTED"; | |
3056 | break; | |
4ee9c684 | 3057 | case DECL_PRIVATE: |
3058 | attr = "PRIVATE"; | |
3059 | break; | |
3060 | case DECL_PUBLIC: | |
3061 | attr = "PUBLIC"; | |
3062 | break; | |
3063 | case DECL_SAVE: | |
3064 | attr = "SAVE"; | |
3065 | break; | |
3066 | case DECL_TARGET: | |
3067 | attr = "TARGET"; | |
3068 | break; | |
c5d33754 | 3069 | case DECL_IS_BIND_C: |
3070 | attr = "IS_BIND_C"; | |
3071 | break; | |
3072 | case DECL_VALUE: | |
3073 | attr = "VALUE"; | |
3074 | break; | |
ef814c81 | 3075 | case DECL_VOLATILE: |
3076 | attr = "VOLATILE"; | |
3077 | break; | |
4ee9c684 | 3078 | default: |
f6d0e37a | 3079 | attr = NULL; /* This shouldn't happen. */ |
4ee9c684 | 3080 | } |
3081 | ||
3082 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
3083 | m = MATCH_ERROR; | |
3084 | goto cleanup; | |
3085 | } | |
3086 | ||
3087 | /* Now that we've dealt with duplicate attributes, add the attributes | |
3088 | to the current attribute. */ | |
3089 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3090 | { | |
3091 | if (seen[d] == 0) | |
3092 | continue; | |
3093 | ||
3094 | if (gfc_current_state () == COMP_DERIVED | |
3095 | && d != DECL_DIMENSION && d != DECL_POINTER | |
c72e5f7e | 3096 | && d != DECL_PRIVATE && d != DECL_PUBLIC |
3097 | && d != DECL_NONE) | |
4ee9c684 | 3098 | { |
2294b616 | 3099 | if (d == DECL_ALLOCATABLE) |
3100 | { | |
1a9745d2 | 3101 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
3102 | "attribute at %C in a TYPE definition") | |
e14bee04 | 3103 | == FAILURE) |
2294b616 | 3104 | { |
3105 | m = MATCH_ERROR; | |
3106 | goto cleanup; | |
3107 | } | |
1a9745d2 | 3108 | } |
3109 | else | |
2294b616 | 3110 | { |
3111 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
e14bee04 | 3112 | &seen_at[d]); |
2294b616 | 3113 | m = MATCH_ERROR; |
3114 | goto cleanup; | |
3115 | } | |
4ee9c684 | 3116 | } |
3117 | ||
ea13b9b7 | 3118 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
1a9745d2 | 3119 | && gfc_current_state () != COMP_MODULE) |
ea13b9b7 | 3120 | { |
3121 | if (d == DECL_PRIVATE) | |
3122 | attr = "PRIVATE"; | |
3123 | else | |
3124 | attr = "PUBLIC"; | |
e14bee04 | 3125 | if (gfc_current_state () == COMP_DERIVED |
3126 | && gfc_state_stack->previous | |
3127 | && gfc_state_stack->previous->state == COMP_MODULE) | |
3128 | { | |
3129 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s " | |
3130 | "at %L in a TYPE definition", attr, | |
3131 | &seen_at[d]) | |
3132 | == FAILURE) | |
3133 | { | |
3134 | m = MATCH_ERROR; | |
3135 | goto cleanup; | |
3136 | } | |
3137 | } | |
3138 | else | |
3139 | { | |
3140 | gfc_error ("%s attribute at %L is not allowed outside of the " | |
3141 | "specification part of a module", attr, &seen_at[d]); | |
3142 | m = MATCH_ERROR; | |
3143 | goto cleanup; | |
3144 | } | |
ea13b9b7 | 3145 | } |
3146 | ||
4ee9c684 | 3147 | switch (d) |
3148 | { | |
3149 | case DECL_ALLOCATABLE: | |
3150 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
3151 | break; | |
3152 | ||
3153 | case DECL_DIMENSION: | |
950683ed | 3154 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 3155 | break; |
3156 | ||
3157 | case DECL_EXTERNAL: | |
3158 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
3159 | break; | |
3160 | ||
3161 | case DECL_IN: | |
3162 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
3163 | break; | |
3164 | ||
3165 | case DECL_OUT: | |
3166 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
3167 | break; | |
3168 | ||
3169 | case DECL_INOUT: | |
3170 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
3171 | break; | |
3172 | ||
3173 | case DECL_INTRINSIC: | |
3174 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
3175 | break; | |
3176 | ||
3177 | case DECL_OPTIONAL: | |
3178 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
3179 | break; | |
3180 | ||
3181 | case DECL_PARAMETER: | |
950683ed | 3182 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
4ee9c684 | 3183 | break; |
3184 | ||
3185 | case DECL_POINTER: | |
3186 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
3187 | break; | |
3188 | ||
3ea52af3 | 3189 | case DECL_PROTECTED: |
3190 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
3191 | { | |
3192 | gfc_error ("PROTECTED at %C only allowed in specification " | |
3193 | "part of a module"); | |
3194 | t = FAILURE; | |
3195 | break; | |
3196 | } | |
3197 | ||
1a9745d2 | 3198 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
3199 | "attribute at %C") | |
3ea52af3 | 3200 | == FAILURE) |
3201 | t = FAILURE; | |
3202 | else | |
3203 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
3204 | break; | |
3205 | ||
4ee9c684 | 3206 | case DECL_PRIVATE: |
950683ed | 3207 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
3208 | &seen_at[d]); | |
4ee9c684 | 3209 | break; |
3210 | ||
3211 | case DECL_PUBLIC: | |
950683ed | 3212 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
3213 | &seen_at[d]); | |
4ee9c684 | 3214 | break; |
3215 | ||
3216 | case DECL_SAVE: | |
950683ed | 3217 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 3218 | break; |
3219 | ||
3220 | case DECL_TARGET: | |
3221 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
3222 | break; | |
3223 | ||
c5d33754 | 3224 | case DECL_IS_BIND_C: |
3225 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); | |
3226 | break; | |
3227 | ||
8f6339b6 | 3228 | case DECL_VALUE: |
1a9745d2 | 3229 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
3230 | "at %C") | |
8f6339b6 | 3231 | == FAILURE) |
3232 | t = FAILURE; | |
3233 | else | |
3234 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
3235 | break; | |
3236 | ||
ef814c81 | 3237 | case DECL_VOLATILE: |
3238 | if (gfc_notify_std (GFC_STD_F2003, | |
1a9745d2 | 3239 | "Fortran 2003: VOLATILE attribute at %C") |
ef814c81 | 3240 | == FAILURE) |
3241 | t = FAILURE; | |
3242 | else | |
3243 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
3244 | break; | |
3245 | ||
4ee9c684 | 3246 | default: |
3247 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
3248 | } | |
3249 | ||
3250 | if (t == FAILURE) | |
3251 | { | |
3252 | m = MATCH_ERROR; | |
3253 | goto cleanup; | |
3254 | } | |
3255 | } | |
3256 | ||
3257 | colon_seen = 1; | |
3258 | return MATCH_YES; | |
3259 | ||
3260 | cleanup: | |
cbb9e6aa | 3261 | gfc_current_locus = start; |
4ee9c684 | 3262 | gfc_free_array_spec (current_as); |
3263 | current_as = NULL; | |
3264 | return m; | |
3265 | } | |
3266 | ||
3267 | ||
c5d33754 | 3268 | /* Set the binding label, dest_label, either with the binding label |
3269 | stored in the given gfc_typespec, ts, or if none was provided, it | |
3270 | will be the symbol name in all lower case, as required by the draft | |
3271 | (J3/04-007, section 15.4.1). If a binding label was given and | |
3272 | there is more than one argument (num_idents), it is an error. */ | |
3273 | ||
f6bb8f4b | 3274 | gfc_try |
c5d33754 | 3275 | set_binding_label (char *dest_label, const char *sym_name, int num_idents) |
3276 | { | |
825718f9 | 3277 | if (num_idents > 1 && has_name_equals) |
c5d33754 | 3278 | { |
825718f9 | 3279 | gfc_error ("Multiple identifiers provided with " |
3280 | "single NAME= specifier at %C"); | |
3281 | return FAILURE; | |
3282 | } | |
c5d33754 | 3283 | |
825718f9 | 3284 | if (curr_binding_label[0] != '\0') |
3285 | { | |
c5d33754 | 3286 | /* Binding label given; store in temp holder til have sym. */ |
b1223b39 | 3287 | strcpy (dest_label, curr_binding_label); |
c5d33754 | 3288 | } |
3289 | else | |
3290 | { | |
3291 | /* No binding label given, and the NAME= specifier did not exist, | |
3292 | which means there was no NAME="". */ | |
3293 | if (sym_name != NULL && has_name_equals == 0) | |
b1223b39 | 3294 | strcpy (dest_label, sym_name); |
c5d33754 | 3295 | } |
3296 | ||
3297 | return SUCCESS; | |
3298 | } | |
3299 | ||
3300 | ||
3301 | /* Set the status of the given common block as being BIND(C) or not, | |
3302 | depending on the given parameter, is_bind_c. */ | |
3303 | ||
3304 | void | |
3305 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) | |
3306 | { | |
3307 | com_block->is_bind_c = is_bind_c; | |
3308 | return; | |
3309 | } | |
3310 | ||
3311 | ||
3312 | /* Verify that the given gfc_typespec is for a C interoperable type. */ | |
3313 | ||
f6bb8f4b | 3314 | gfc_try |
209d3778 | 3315 | verify_c_interop (gfc_typespec *ts) |
c5d33754 | 3316 | { |
c5d33754 | 3317 | if (ts->type == BT_DERIVED && ts->derived != NULL) |
3318 | return (ts->derived->ts.is_c_interop ? SUCCESS : FAILURE); | |
3319 | else if (ts->is_c_interop != 1) | |
3320 | return FAILURE; | |
3321 | ||
3322 | return SUCCESS; | |
3323 | } | |
3324 | ||
3325 | ||
3326 | /* Verify that the variables of a given common block, which has been | |
3327 | defined with the attribute specifier bind(c), to be of a C | |
3328 | interoperable type. Errors will be reported here, if | |
3329 | encountered. */ | |
3330 | ||
f6bb8f4b | 3331 | gfc_try |
c5d33754 | 3332 | verify_com_block_vars_c_interop (gfc_common_head *com_block) |
3333 | { | |
3334 | gfc_symbol *curr_sym = NULL; | |
f6bb8f4b | 3335 | gfc_try retval = SUCCESS; |
c5d33754 | 3336 | |
3337 | curr_sym = com_block->head; | |
3338 | ||
3339 | /* Make sure we have at least one symbol. */ | |
3340 | if (curr_sym == NULL) | |
3341 | return retval; | |
3342 | ||
3343 | /* Here we know we have a symbol, so we'll execute this loop | |
3344 | at least once. */ | |
3345 | do | |
3346 | { | |
3347 | /* The second to last param, 1, says this is in a common block. */ | |
3348 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); | |
3349 | curr_sym = curr_sym->common_next; | |
3350 | } while (curr_sym != NULL); | |
3351 | ||
3352 | return retval; | |
3353 | } | |
3354 | ||
3355 | ||
3356 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, | |
3357 | an appropriate error message is reported. */ | |
3358 | ||
f6bb8f4b | 3359 | gfc_try |
c5d33754 | 3360 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, |
3361 | int is_in_common, gfc_common_head *com_block) | |
3362 | { | |
1f2ab120 | 3363 | bool bind_c_function = false; |
f6bb8f4b | 3364 | gfc_try retval = SUCCESS; |
4f7bb9ec | 3365 | |
1f2ab120 | 3366 | if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c) |
3367 | bind_c_function = true; | |
3368 | ||
4f7bb9ec | 3369 | if (tmp_sym->attr.function && tmp_sym->result != NULL) |
3370 | { | |
3371 | tmp_sym = tmp_sym->result; | |
3372 | /* Make sure it wasn't an implicitly typed result. */ | |
3373 | if (tmp_sym->attr.implicit_type) | |
3374 | { | |
3375 | gfc_warning ("Implicitly declared BIND(C) function '%s' at " | |
3376 | "%L may not be C interoperable", tmp_sym->name, | |
3377 | &tmp_sym->declared_at); | |
3378 | tmp_sym->ts.f90_type = tmp_sym->ts.type; | |
3379 | /* Mark it as C interoperable to prevent duplicate warnings. */ | |
3380 | tmp_sym->ts.is_c_interop = 1; | |
3381 | tmp_sym->attr.is_c_interop = 1; | |
3382 | } | |
3383 | } | |
1f2ab120 | 3384 | |
c5d33754 | 3385 | /* Here, we know we have the bind(c) attribute, so if we have |
3386 | enough type info, then verify that it's a C interop kind. | |
3387 | The info could be in the symbol already, or possibly still in | |
3388 | the given ts (current_ts), so look in both. */ | |
3389 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) | |
3390 | { | |
209d3778 | 3391 | if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS) |
c5d33754 | 3392 | { |
3393 | /* See if we're dealing with a sym in a common block or not. */ | |
3394 | if (is_in_common == 1) | |
3395 | { | |
3396 | gfc_warning ("Variable '%s' in common block '%s' at %L " | |
3397 | "may not be a C interoperable " | |
3398 | "kind though common block '%s' is BIND(C)", | |
3399 | tmp_sym->name, com_block->name, | |
3400 | &(tmp_sym->declared_at), com_block->name); | |
3401 | } | |
3402 | else | |
3403 | { | |
3404 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) | |
3405 | gfc_error ("Type declaration '%s' at %L is not C " | |
3406 | "interoperable but it is BIND(C)", | |
3407 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3408 | else | |
3409 | gfc_warning ("Variable '%s' at %L " | |
3410 | "may not be a C interoperable " | |
3411 | "kind but it is bind(c)", | |
3412 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3413 | } | |
3414 | } | |
3415 | ||
3416 | /* Variables declared w/in a common block can't be bind(c) | |
3417 | since there's no way for C to see these variables, so there's | |
3418 | semantically no reason for the attribute. */ | |
3419 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) | |
3420 | { | |
3421 | gfc_error ("Variable '%s' in common block '%s' at " | |
3422 | "%L cannot be declared with BIND(C) " | |
3423 | "since it is not a global", | |
3424 | tmp_sym->name, com_block->name, | |
3425 | &(tmp_sym->declared_at)); | |
3426 | retval = FAILURE; | |
3427 | } | |
3428 | ||
3429 | /* Scalar variables that are bind(c) can not have the pointer | |
3430 | or allocatable attributes. */ | |
3431 | if (tmp_sym->attr.is_bind_c == 1) | |
3432 | { | |
3433 | if (tmp_sym->attr.pointer == 1) | |
3434 | { | |
3435 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3436 | "POINTER and BIND(C) attributes", | |
3437 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3438 | retval = FAILURE; | |
3439 | } | |
3440 | ||
3441 | if (tmp_sym->attr.allocatable == 1) | |
3442 | { | |
3443 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3444 | "ALLOCATABLE and BIND(C) attributes", | |
3445 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3446 | retval = FAILURE; | |
3447 | } | |
3448 | ||
1f2ab120 | 3449 | } |
3450 | ||
3451 | /* If it is a BIND(C) function, make sure the return value is a | |
3452 | scalar value. The previous tests in this function made sure | |
3453 | the type is interoperable. */ | |
3454 | if (bind_c_function && tmp_sym->as != NULL) | |
3455 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3456 | "be an array", tmp_sym->name, &(tmp_sym->declared_at)); | |
3457 | ||
3458 | /* BIND(C) functions can not return a character string. */ | |
3459 | if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER) | |
3460 | if (tmp_sym->ts.cl == NULL || tmp_sym->ts.cl->length == NULL | |
3461 | || tmp_sym->ts.cl->length->expr_type != EXPR_CONSTANT | |
3462 | || mpz_cmp_si (tmp_sym->ts.cl->length->value.integer, 1) != 0) | |
3463 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
c5d33754 | 3464 | "be a character string", tmp_sym->name, |
3465 | &(tmp_sym->declared_at)); | |
c5d33754 | 3466 | } |
3467 | ||
3468 | /* See if the symbol has been marked as private. If it has, make sure | |
3469 | there is no binding label and warn the user if there is one. */ | |
3470 | if (tmp_sym->attr.access == ACCESS_PRIVATE | |
3471 | && tmp_sym->binding_label[0] != '\0') | |
3472 | /* Use gfc_warning_now because we won't say that the symbol fails | |
3473 | just because of this. */ | |
3474 | gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " | |
3475 | "given the binding label '%s'", tmp_sym->name, | |
3476 | &(tmp_sym->declared_at), tmp_sym->binding_label); | |
3477 | ||
3478 | return retval; | |
3479 | } | |
3480 | ||
3481 | ||
3482 | /* Set the appropriate fields for a symbol that's been declared as | |
3483 | BIND(C) (the is_bind_c flag and the binding label), and verify that | |
3484 | the type is C interoperable. Errors are reported by the functions | |
3485 | used to set/test these fields. */ | |
3486 | ||
f6bb8f4b | 3487 | gfc_try |
c5d33754 | 3488 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) |
3489 | { | |
f6bb8f4b | 3490 | gfc_try retval = SUCCESS; |
c5d33754 | 3491 | |
3492 | /* TODO: Do we need to make sure the vars aren't marked private? */ | |
3493 | ||
3494 | /* Set the is_bind_c bit in symbol_attribute. */ | |
3495 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); | |
3496 | ||
3497 | if (set_binding_label (tmp_sym->binding_label, tmp_sym->name, | |
3498 | num_idents) != SUCCESS) | |
3499 | return FAILURE; | |
3500 | ||
3501 | return retval; | |
3502 | } | |
3503 | ||
3504 | ||
3505 | /* Set the fields marking the given common block as BIND(C), including | |
3506 | a binding label, and report any errors encountered. */ | |
3507 | ||
f6bb8f4b | 3508 | gfc_try |
c5d33754 | 3509 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) |
3510 | { | |
f6bb8f4b | 3511 | gfc_try retval = SUCCESS; |
c5d33754 | 3512 | |
3513 | /* destLabel, common name, typespec (which may have binding label). */ | |
3514 | if (set_binding_label (com_block->binding_label, com_block->name, num_idents) | |
3515 | != SUCCESS) | |
3516 | return FAILURE; | |
3517 | ||
3518 | /* Set the given common block (com_block) to being bind(c) (1). */ | |
3519 | set_com_block_bind_c (com_block, 1); | |
3520 | ||
3521 | return retval; | |
3522 | } | |
3523 | ||
3524 | ||
3525 | /* Retrieve the list of one or more identifiers that the given bind(c) | |
3526 | attribute applies to. */ | |
3527 | ||
f6bb8f4b | 3528 | gfc_try |
c5d33754 | 3529 | get_bind_c_idents (void) |
3530 | { | |
3531 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3532 | int num_idents = 0; | |
3533 | gfc_symbol *tmp_sym = NULL; | |
3534 | match found_id; | |
3535 | gfc_common_head *com_block = NULL; | |
3536 | ||
3537 | if (gfc_match_name (name) == MATCH_YES) | |
3538 | { | |
3539 | found_id = MATCH_YES; | |
3540 | gfc_get_ha_symbol (name, &tmp_sym); | |
3541 | } | |
3542 | else if (match_common_name (name) == MATCH_YES) | |
3543 | { | |
3544 | found_id = MATCH_YES; | |
3545 | com_block = gfc_get_common (name, 0); | |
3546 | } | |
3547 | else | |
3548 | { | |
3549 | gfc_error ("Need either entity or common block name for " | |
3550 | "attribute specification statement at %C"); | |
3551 | return FAILURE; | |
3552 | } | |
3553 | ||
3554 | /* Save the current identifier and look for more. */ | |
3555 | do | |
3556 | { | |
3557 | /* Increment the number of identifiers found for this spec stmt. */ | |
3558 | num_idents++; | |
3559 | ||
3560 | /* Make sure we have a sym or com block, and verify that it can | |
3561 | be bind(c). Set the appropriate field(s) and look for more | |
3562 | identifiers. */ | |
3563 | if (tmp_sym != NULL || com_block != NULL) | |
3564 | { | |
3565 | if (tmp_sym != NULL) | |
3566 | { | |
3567 | if (set_verify_bind_c_sym (tmp_sym, num_idents) | |
3568 | != SUCCESS) | |
3569 | return FAILURE; | |
3570 | } | |
3571 | else | |
3572 | { | |
3573 | if (set_verify_bind_c_com_block(com_block, num_idents) | |
3574 | != SUCCESS) | |
3575 | return FAILURE; | |
3576 | } | |
3577 | ||
3578 | /* Look to see if we have another identifier. */ | |
3579 | tmp_sym = NULL; | |
3580 | if (gfc_match_eos () == MATCH_YES) | |
3581 | found_id = MATCH_NO; | |
3582 | else if (gfc_match_char (',') != MATCH_YES) | |
3583 | found_id = MATCH_NO; | |
3584 | else if (gfc_match_name (name) == MATCH_YES) | |
3585 | { | |
3586 | found_id = MATCH_YES; | |
3587 | gfc_get_ha_symbol (name, &tmp_sym); | |
3588 | } | |
3589 | else if (match_common_name (name) == MATCH_YES) | |
3590 | { | |
3591 | found_id = MATCH_YES; | |
3592 | com_block = gfc_get_common (name, 0); | |
3593 | } | |
3594 | else | |
3595 | { | |
3596 | gfc_error ("Missing entity or common block name for " | |
3597 | "attribute specification statement at %C"); | |
3598 | return FAILURE; | |
3599 | } | |
3600 | } | |
3601 | else | |
3602 | { | |
3603 | gfc_internal_error ("Missing symbol"); | |
3604 | } | |
3605 | } while (found_id == MATCH_YES); | |
3606 | ||
3607 | /* if we get here we were successful */ | |
3608 | return SUCCESS; | |
3609 | } | |
3610 | ||
3611 | ||
3612 | /* Try and match a BIND(C) attribute specification statement. */ | |
3613 | ||
3614 | match | |
3615 | gfc_match_bind_c_stmt (void) | |
3616 | { | |
3617 | match found_match = MATCH_NO; | |
3618 | gfc_typespec *ts; | |
3619 | ||
3620 | ts = ¤t_ts; | |
3621 | ||
3622 | /* This may not be necessary. */ | |
3623 | gfc_clear_ts (ts); | |
3624 | /* Clear the temporary binding label holder. */ | |
3625 | curr_binding_label[0] = '\0'; | |
3626 | ||
3627 | /* Look for the bind(c). */ | |
75ae7f6c | 3628 | found_match = gfc_match_bind_c (NULL, true); |
c5d33754 | 3629 | |
3630 | if (found_match == MATCH_YES) | |
3631 | { | |
3632 | /* Look for the :: now, but it is not required. */ | |
3633 | gfc_match (" :: "); | |
3634 | ||
3635 | /* Get the identifier(s) that needs to be updated. This may need to | |
3636 | change to hand the flag(s) for the attr specified so all identifiers | |
3637 | found can have all appropriate parts updated (assuming that the same | |
3638 | spec stmt can have multiple attrs, such as both bind(c) and | |
3639 | allocatable...). */ | |
3640 | if (get_bind_c_idents () != SUCCESS) | |
3641 | /* Error message should have printed already. */ | |
3642 | return MATCH_ERROR; | |
3643 | } | |
3644 | ||
3645 | return found_match; | |
3646 | } | |
3647 | ||
3648 | ||
4ee9c684 | 3649 | /* Match a data declaration statement. */ |
3650 | ||
3651 | match | |
3652 | gfc_match_data_decl (void) | |
3653 | { | |
3654 | gfc_symbol *sym; | |
3655 | match m; | |
3923b69f | 3656 | int elem; |
4ee9c684 | 3657 | |
c5d33754 | 3658 | num_idents_on_line = 0; |
3659 | ||
67a51c8e | 3660 | m = gfc_match_type_spec (¤t_ts, 0); |
4ee9c684 | 3661 | if (m != MATCH_YES) |
3662 | return m; | |
3663 | ||
3664 | if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) | |
3665 | { | |
3666 | sym = gfc_use_derived (current_ts.derived); | |
3667 | ||
3668 | if (sym == NULL) | |
3669 | { | |
3670 | m = MATCH_ERROR; | |
3671 | goto cleanup; | |
3672 | } | |
3673 | ||
3674 | current_ts.derived = sym; | |
3675 | } | |
3676 | ||
3677 | m = match_attr_spec (); | |
3678 | if (m == MATCH_ERROR) | |
3679 | { | |
3680 | m = MATCH_NO; | |
3681 | goto cleanup; | |
3682 | } | |
3683 | ||
e6b82afc | 3684 | if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL |
3685 | && !current_ts.derived->attr.zero_comp) | |
4ee9c684 | 3686 | { |
3687 | ||
3688 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
3689 | goto ok; | |
3690 | ||
40cf8078 | 3691 | gfc_find_symbol (current_ts.derived->name, |
1a9745d2 | 3692 | current_ts.derived->ns->parent, 1, &sym); |
4ee9c684 | 3693 | |
40cf8078 | 3694 | /* Any symbol that we find had better be a type definition |
1a9745d2 | 3695 | which has its components defined. */ |
40cf8078 | 3696 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
e6b82afc | 3697 | && (current_ts.derived->components != NULL |
3698 | || current_ts.derived->attr.zero_comp)) | |
4ee9c684 | 3699 | goto ok; |
3700 | ||
40cf8078 | 3701 | /* Now we have an error, which we signal, and then fix up |
3702 | because the knock-on is plain and simple confusing. */ | |
3703 | gfc_error_now ("Derived type at %C has not been previously defined " | |
1a9745d2 | 3704 | "and so cannot appear in a derived type definition"); |
40cf8078 | 3705 | current_attr.pointer = 1; |
3706 | goto ok; | |
4ee9c684 | 3707 | } |
3708 | ||
3709 | ok: | |
3710 | /* If we have an old-style character declaration, and no new-style | |
3711 | attribute specifications, then there a comma is optional between | |
3712 | the type specification and the variable list. */ | |
3713 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
3714 | gfc_match_char (','); | |
3715 | ||
3923b69f | 3716 | /* Give the types/attributes to symbols that follow. Give the element |
3717 | a number so that repeat character length expressions can be copied. */ | |
3718 | elem = 1; | |
4ee9c684 | 3719 | for (;;) |
3720 | { | |
c5d33754 | 3721 | num_idents_on_line++; |
3923b69f | 3722 | m = variable_decl (elem++); |
4ee9c684 | 3723 | if (m == MATCH_ERROR) |
3724 | goto cleanup; | |
3725 | if (m == MATCH_NO) | |
3726 | break; | |
3727 | ||
3728 | if (gfc_match_eos () == MATCH_YES) | |
3729 | goto cleanup; | |
3730 | if (gfc_match_char (',') != MATCH_YES) | |
3731 | break; | |
3732 | } | |
3733 | ||
8f0bdb23 | 3734 | if (gfc_error_flag_test () == 0) |
3735 | gfc_error ("Syntax error in data declaration at %C"); | |
4ee9c684 | 3736 | m = MATCH_ERROR; |
3737 | ||
af29c1f0 | 3738 | gfc_free_data_all (gfc_current_ns); |
3739 | ||
4ee9c684 | 3740 | cleanup: |
3741 | gfc_free_array_spec (current_as); | |
3742 | current_as = NULL; | |
3743 | return m; | |
3744 | } | |
3745 | ||
3746 | ||
3747 | /* Match a prefix associated with a function or subroutine | |
3748 | declaration. If the typespec pointer is nonnull, then a typespec | |
3749 | can be matched. Note that if nothing matches, MATCH_YES is | |
3750 | returned (the null string was matched). */ | |
3751 | ||
077932f9 | 3752 | match |
3753 | gfc_match_prefix (gfc_typespec *ts) | |
4ee9c684 | 3754 | { |
5b11d932 | 3755 | bool seen_type; |
4ee9c684 | 3756 | |
3757 | gfc_clear_attr (¤t_attr); | |
3758 | seen_type = 0; | |
3759 | ||
d1645c7b | 3760 | gcc_assert (!gfc_matching_prefix); |
3761 | gfc_matching_prefix = true; | |
40de255b | 3762 | |
4ee9c684 | 3763 | loop: |
3764 | if (!seen_type && ts != NULL | |
67a51c8e | 3765 | && gfc_match_type_spec (ts, 0) == MATCH_YES |
4ee9c684 | 3766 | && gfc_match_space () == MATCH_YES) |
3767 | { | |
3768 | ||
3769 | seen_type = 1; | |
3770 | goto loop; | |
3771 | } | |
3772 | ||
3773 | if (gfc_match ("elemental% ") == MATCH_YES) | |
3774 | { | |
3775 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
40de255b | 3776 | goto error; |
4ee9c684 | 3777 | |
3778 | goto loop; | |
3779 | } | |
3780 | ||
3781 | if (gfc_match ("pure% ") == MATCH_YES) | |
3782 | { | |
3783 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
40de255b | 3784 | goto error; |
4ee9c684 | 3785 | |
3786 | goto loop; | |
3787 | } | |
3788 | ||
3789 | if (gfc_match ("recursive% ") == MATCH_YES) | |
3790 | { | |
3791 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
40de255b | 3792 | goto error; |
4ee9c684 | 3793 | |
3794 | goto loop; | |
3795 | } | |
3796 | ||
3797 | /* At this point, the next item is not a prefix. */ | |
d1645c7b | 3798 | gcc_assert (gfc_matching_prefix); |
3799 | gfc_matching_prefix = false; | |
4ee9c684 | 3800 | return MATCH_YES; |
40de255b | 3801 | |
3802 | error: | |
d1645c7b | 3803 | gcc_assert (gfc_matching_prefix); |
3804 | gfc_matching_prefix = false; | |
40de255b | 3805 | return MATCH_ERROR; |
4ee9c684 | 3806 | } |
3807 | ||
3808 | ||
077932f9 | 3809 | /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */ |
4ee9c684 | 3810 | |
f6bb8f4b | 3811 | static gfc_try |
1a9745d2 | 3812 | copy_prefix (symbol_attribute *dest, locus *where) |
4ee9c684 | 3813 | { |
4ee9c684 | 3814 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
3815 | return FAILURE; | |
3816 | ||
3817 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
3818 | return FAILURE; | |
3819 | ||
3820 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
3821 | return FAILURE; | |
3822 | ||
3823 | return SUCCESS; | |
3824 | } | |
3825 | ||
3826 | ||
3827 | /* Match a formal argument list. */ | |
3828 | ||
3829 | match | |
1a9745d2 | 3830 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
4ee9c684 | 3831 | { |
3832 | gfc_formal_arglist *head, *tail, *p, *q; | |
3833 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3834 | gfc_symbol *sym; | |
3835 | match m; | |
3836 | ||
3837 | head = tail = NULL; | |
3838 | ||
3839 | if (gfc_match_char ('(') != MATCH_YES) | |
3840 | { | |
3841 | if (null_flag) | |
3842 | goto ok; | |
3843 | return MATCH_NO; | |
3844 | } | |
3845 | ||
3846 | if (gfc_match_char (')') == MATCH_YES) | |
3847 | goto ok; | |
3848 | ||
3849 | for (;;) | |
3850 | { | |
3851 | if (gfc_match_char ('*') == MATCH_YES) | |
3852 | sym = NULL; | |
3853 | else | |
3854 | { | |
3855 | m = gfc_match_name (name); | |
3856 | if (m != MATCH_YES) | |
3857 | goto cleanup; | |
3858 | ||
3859 | if (gfc_get_symbol (name, NULL, &sym)) | |
3860 | goto cleanup; | |
3861 | } | |
3862 | ||
3863 | p = gfc_get_formal_arglist (); | |
3864 | ||
3865 | if (head == NULL) | |
3866 | head = tail = p; | |
3867 | else | |
3868 | { | |
3869 | tail->next = p; | |
3870 | tail = p; | |
3871 | } | |
3872 | ||
3873 | tail->sym = sym; | |
3874 | ||
3875 | /* We don't add the VARIABLE flavor because the name could be a | |
1a9745d2 | 3876 | dummy procedure. We don't apply these attributes to formal |
3877 | arguments of statement functions. */ | |
4ee9c684 | 3878 | if (sym != NULL && !st_flag |
950683ed | 3879 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
4ee9c684 | 3880 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
3881 | { | |
3882 | m = MATCH_ERROR; | |
3883 | goto cleanup; | |
3884 | } | |
3885 | ||
3886 | /* The name of a program unit can be in a different namespace, | |
1a9745d2 | 3887 | so check for it explicitly. After the statement is accepted, |
3888 | the name is checked for especially in gfc_get_symbol(). */ | |
4ee9c684 | 3889 | if (gfc_new_block != NULL && sym != NULL |
3890 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
3891 | { | |
3892 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
3893 | sym->name); | |
3894 | m = MATCH_ERROR; | |
3895 | goto cleanup; | |
3896 | } | |
3897 | ||
3898 | if (gfc_match_char (')') == MATCH_YES) | |
3899 | goto ok; | |
3900 | ||
3901 | m = gfc_match_char (','); | |
3902 | if (m != MATCH_YES) | |
3903 | { | |
3904 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
3905 | goto cleanup; | |
3906 | } | |
3907 | } | |
3908 | ||
3909 | ok: | |
3910 | /* Check for duplicate symbols in the formal argument list. */ | |
3911 | if (head != NULL) | |
3912 | { | |
3913 | for (p = head; p->next; p = p->next) | |
3914 | { | |
3915 | if (p->sym == NULL) | |
3916 | continue; | |
3917 | ||
3918 | for (q = p->next; q; q = q->next) | |
3919 | if (p->sym == q->sym) | |
3920 | { | |
1a9745d2 | 3921 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
3922 | "at %C", p->sym->name); | |
4ee9c684 | 3923 | |
3924 | m = MATCH_ERROR; | |
3925 | goto cleanup; | |
3926 | } | |
3927 | } | |
3928 | } | |
3929 | ||
f6d0e37a | 3930 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) |
3931 | == FAILURE) | |
4ee9c684 | 3932 | { |
3933 | m = MATCH_ERROR; | |
3934 | goto cleanup; | |
3935 | } | |
3936 | ||
3937 | return MATCH_YES; | |
3938 | ||
3939 | cleanup: | |
3940 | gfc_free_formal_arglist (head); | |
3941 | return m; | |
3942 | } | |
3943 | ||
3944 | ||
3945 | /* Match a RESULT specification following a function declaration or | |
3946 | ENTRY statement. Also matches the end-of-statement. */ | |
3947 | ||
3948 | static match | |
f6d0e37a | 3949 | match_result (gfc_symbol *function, gfc_symbol **result) |
4ee9c684 | 3950 | { |
3951 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3952 | gfc_symbol *r; | |
3953 | match m; | |
3954 | ||
3955 | if (gfc_match (" result (") != MATCH_YES) | |
3956 | return MATCH_NO; | |
3957 | ||
3958 | m = gfc_match_name (name); | |
3959 | if (m != MATCH_YES) | |
3960 | return m; | |
3961 | ||
c5d33754 | 3962 | /* Get the right paren, and that's it because there could be the |
3963 | bind(c) attribute after the result clause. */ | |
3964 | if (gfc_match_char(')') != MATCH_YES) | |
4ee9c684 | 3965 | { |
c5d33754 | 3966 | /* TODO: should report the missing right paren here. */ |
4ee9c684 | 3967 | return MATCH_ERROR; |
3968 | } | |
3969 | ||
3970 | if (strcmp (function->name, name) == 0) | |
3971 | { | |
1a9745d2 | 3972 | gfc_error ("RESULT variable at %C must be different than function name"); |
4ee9c684 | 3973 | return MATCH_ERROR; |
3974 | } | |
3975 | ||
3976 | if (gfc_get_symbol (name, NULL, &r)) | |
3977 | return MATCH_ERROR; | |
3978 | ||
f6d3042b | 3979 | if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE) |
4ee9c684 | 3980 | return MATCH_ERROR; |
3981 | ||
3982 | *result = r; | |
3983 | ||
3984 | return MATCH_YES; | |
3985 | } | |
3986 | ||
3987 | ||
c5d33754 | 3988 | /* Match a function suffix, which could be a combination of a result |
3989 | clause and BIND(C), either one, or neither. The draft does not | |
3990 | require them to come in a specific order. */ | |
3991 | ||
3992 | match | |
3993 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) | |
3994 | { | |
3995 | match is_bind_c; /* Found bind(c). */ | |
3996 | match is_result; /* Found result clause. */ | |
3997 | match found_match; /* Status of whether we've found a good match. */ | |
e0be6f02 | 3998 | char peek_char; /* Character we're going to peek at. */ |
75ae7f6c | 3999 | bool allow_binding_name; |
c5d33754 | 4000 | |
4001 | /* Initialize to having found nothing. */ | |
4002 | found_match = MATCH_NO; | |
4003 | is_bind_c = MATCH_NO; | |
4004 | is_result = MATCH_NO; | |
4005 | ||
4006 | /* Get the next char to narrow between result and bind(c). */ | |
4007 | gfc_gobble_whitespace (); | |
e0be6f02 | 4008 | peek_char = gfc_peek_ascii_char (); |
c5d33754 | 4009 | |
75ae7f6c | 4010 | /* C binding names are not allowed for internal procedures. */ |
4011 | if (gfc_current_state () == COMP_CONTAINS | |
4012 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
4013 | allow_binding_name = false; | |
4014 | else | |
4015 | allow_binding_name = true; | |
4016 | ||
c5d33754 | 4017 | switch (peek_char) |
4018 | { | |
4019 | case 'r': | |
4020 | /* Look for result clause. */ | |
4021 | is_result = match_result (sym, result); | |
4022 | if (is_result == MATCH_YES) | |
4023 | { | |
4024 | /* Now see if there is a bind(c) after it. */ | |
75ae7f6c | 4025 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 4026 | /* We've found the result clause and possibly bind(c). */ |
4027 | found_match = MATCH_YES; | |
4028 | } | |
4029 | else | |
4030 | /* This should only be MATCH_ERROR. */ | |
4031 | found_match = is_result; | |
4032 | break; | |
4033 | case 'b': | |
4034 | /* Look for bind(c) first. */ | |
75ae7f6c | 4035 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 4036 | if (is_bind_c == MATCH_YES) |
4037 | { | |
4038 | /* Now see if a result clause followed it. */ | |
4039 | is_result = match_result (sym, result); | |
4040 | found_match = MATCH_YES; | |
4041 | } | |
4042 | else | |
4043 | { | |
4044 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ | |
4045 | found_match = MATCH_ERROR; | |
4046 | } | |
4047 | break; | |
4048 | default: | |
4049 | gfc_error ("Unexpected junk after function declaration at %C"); | |
4050 | found_match = MATCH_ERROR; | |
4051 | break; | |
4052 | } | |
4053 | ||
c5d33754 | 4054 | if (is_bind_c == MATCH_YES) |
4518e961 | 4055 | { |
75ae7f6c | 4056 | /* Fortran 2008 draft allows BIND(C) for internal procedures. */ |
4518e961 | 4057 | if (gfc_current_state () == COMP_CONTAINS |
75ae7f6c | 4058 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
2dcae6c7 | 4059 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
4060 | "at %L may not be specified for an internal " | |
4061 | "procedure", &gfc_current_locus) | |
75ae7f6c | 4062 | == FAILURE) |
4063 | return MATCH_ERROR; | |
4064 | ||
4518e961 | 4065 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) |
4066 | == FAILURE) | |
4067 | return MATCH_ERROR; | |
4068 | } | |
c5d33754 | 4069 | |
4070 | return found_match; | |
4071 | } | |
4072 | ||
4073 | ||
1e057e9b | 4074 | /* Procedure pointer return value without RESULT statement: |
4075 | Add "hidden" result variable named "ppr@". */ | |
4076 | ||
4077 | static gfc_try | |
4078 | add_hidden_procptr_result (gfc_symbol *sym) | |
4079 | { | |
4080 | bool case1,case2; | |
4081 | ||
4082 | if (gfc_notification_std (GFC_STD_F2003) == ERROR) | |
4083 | return FAILURE; | |
4084 | ||
4085 | /* First usage case: PROCEDURE and EXTERNAL statements. */ | |
4086 | case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block () | |
4087 | && strcmp (gfc_current_block ()->name, sym->name) == 0 | |
4088 | && sym->attr.external; | |
4089 | /* Second usage case: INTERFACE statements. */ | |
4090 | case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous | |
4091 | && gfc_state_stack->previous->state == COMP_FUNCTION | |
4092 | && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0; | |
4093 | ||
4094 | if (case1 || case2) | |
4095 | { | |
4096 | gfc_symtree *stree; | |
4097 | if (case1) | |
36b0a1b0 | 4098 | gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false); |
1e057e9b | 4099 | else if (case2) |
180a5dc0 | 4100 | { |
4101 | gfc_symtree *st2; | |
36b0a1b0 | 4102 | gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false); |
180a5dc0 | 4103 | st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@"); |
4104 | st2->n.sym = stree->n.sym; | |
4105 | } | |
1e057e9b | 4106 | sym->result = stree->n.sym; |
4107 | ||
4108 | sym->result->attr.proc_pointer = sym->attr.proc_pointer; | |
4109 | sym->result->attr.pointer = sym->attr.pointer; | |
4110 | sym->result->attr.external = sym->attr.external; | |
4111 | sym->result->attr.referenced = sym->attr.referenced; | |
e40ac2fe | 4112 | sym->result->ts = sym->ts; |
1e057e9b | 4113 | sym->attr.proc_pointer = 0; |
4114 | sym->attr.pointer = 0; | |
4115 | sym->attr.external = 0; | |
4116 | if (sym->result->attr.external && sym->result->attr.pointer) | |
4117 | { | |
4118 | sym->result->attr.pointer = 0; | |
4119 | sym->result->attr.proc_pointer = 1; | |
4120 | } | |
4121 | ||
4122 | return gfc_add_result (&sym->result->attr, sym->result->name, NULL); | |
4123 | } | |
4124 | /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */ | |
4125 | else if (sym->attr.function && !sym->attr.external && sym->attr.pointer | |
4126 | && sym->result && sym->result != sym && sym->result->attr.external | |
4127 | && sym == gfc_current_ns->proc_name | |
4128 | && sym == sym->result->ns->proc_name | |
4129 | && strcmp ("ppr@", sym->result->name) == 0) | |
4130 | { | |
4131 | sym->result->attr.proc_pointer = 1; | |
4132 | sym->attr.pointer = 0; | |
4133 | return SUCCESS; | |
4134 | } | |
4135 | else | |
4136 | return FAILURE; | |
4137 | } | |
4138 | ||
4139 | ||
64e93293 | 4140 | /* Match the interface for a PROCEDURE declaration, |
4141 | including brackets (R1212). */ | |
af1a34ee | 4142 | |
4143 | static match | |
64e93293 | 4144 | match_procedure_interface (gfc_symbol **proc_if) |
af1a34ee | 4145 | { |
4146 | match m; | |
1eb2b542 | 4147 | gfc_symtree *st; |
af1a34ee | 4148 | locus old_loc, entry_loc; |
1eb2b542 | 4149 | gfc_namespace *old_ns = gfc_current_ns; |
4150 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
af1a34ee | 4151 | |
1eb2b542 | 4152 | old_loc = entry_loc = gfc_current_locus; |
af1a34ee | 4153 | gfc_clear_ts (¤t_ts); |
4154 | ||
4155 | if (gfc_match (" (") != MATCH_YES) | |
4156 | { | |
4157 | gfc_current_locus = entry_loc; | |
4158 | return MATCH_NO; | |
4159 | } | |
4160 | ||
4161 | /* Get the type spec. for the procedure interface. */ | |
4162 | old_loc = gfc_current_locus; | |
67a51c8e | 4163 | m = gfc_match_type_spec (¤t_ts, 0); |
fd1277c3 | 4164 | gfc_gobble_whitespace (); |
e0be6f02 | 4165 | if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')')) |
af1a34ee | 4166 | goto got_ts; |
4167 | ||
4168 | if (m == MATCH_ERROR) | |
4169 | return m; | |
4170 | ||
1eb2b542 | 4171 | /* Procedure interface is itself a procedure. */ |
af1a34ee | 4172 | gfc_current_locus = old_loc; |
1eb2b542 | 4173 | m = gfc_match_name (name); |
af1a34ee | 4174 | |
1eb2b542 | 4175 | /* First look to see if it is already accessible in the current |
4176 | namespace because it is use associated or contained. */ | |
4177 | st = NULL; | |
4178 | if (gfc_find_sym_tree (name, NULL, 0, &st)) | |
4179 | return MATCH_ERROR; | |
4180 | ||
4181 | /* If it is still not found, then try the parent namespace, if it | |
4182 | exists and create the symbol there if it is still not found. */ | |
4183 | if (gfc_current_ns->parent) | |
4184 | gfc_current_ns = gfc_current_ns->parent; | |
4185 | if (st == NULL && gfc_get_ha_sym_tree (name, &st)) | |
4186 | return MATCH_ERROR; | |
4187 | ||
4188 | gfc_current_ns = old_ns; | |
4189 | *proc_if = st->n.sym; | |
af1a34ee | 4190 | |
4191 | /* Various interface checks. */ | |
64e93293 | 4192 | if (*proc_if) |
af1a34ee | 4193 | { |
64e93293 | 4194 | (*proc_if)->refs++; |
74113644 | 4195 | /* Resolve interface if possible. That way, attr.procedure is only set |
4196 | if it is declared by a later procedure-declaration-stmt, which is | |
4197 | invalid per C1212. */ | |
64e93293 | 4198 | while ((*proc_if)->ts.interface) |
4199 | *proc_if = (*proc_if)->ts.interface; | |
74113644 | 4200 | |
64e93293 | 4201 | if ((*proc_if)->generic) |
af1a34ee | 4202 | { |
64e93293 | 4203 | gfc_error ("Interface '%s' at %C may not be generic", |
4204 | (*proc_if)->name); | |
af1a34ee | 4205 | return MATCH_ERROR; |
4206 | } | |
64e93293 | 4207 | if ((*proc_if)->attr.proc == PROC_ST_FUNCTION) |
af1a34ee | 4208 | { |
4209 | gfc_error ("Interface '%s' at %C may not be a statement function", | |
64e93293 | 4210 | (*proc_if)->name); |
af1a34ee | 4211 | return MATCH_ERROR; |
4212 | } | |
4213 | /* Handle intrinsic procedures. */ | |
64e93293 | 4214 | if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc |
4215 | || (*proc_if)->attr.if_source == IFSRC_IFBODY) | |
4216 | && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus) | |
4217 | || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus))) | |
4218 | (*proc_if)->attr.intrinsic = 1; | |
4219 | if ((*proc_if)->attr.intrinsic | |
4220 | && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0)) | |
af1a34ee | 4221 | { |
4222 | gfc_error ("Intrinsic procedure '%s' not allowed " | |
64e93293 | 4223 | "in PROCEDURE statement at %C", (*proc_if)->name); |
af1a34ee | 4224 | return MATCH_ERROR; |
4225 | } | |
af1a34ee | 4226 | } |
4227 | ||
4228 | got_ts: | |
af1a34ee | 4229 | if (gfc_match (" )") != MATCH_YES) |
4230 | { | |
4231 | gfc_current_locus = entry_loc; | |
4232 | return MATCH_NO; | |
4233 | } | |
4234 | ||
64e93293 | 4235 | return MATCH_YES; |
4236 | } | |
4237 | ||
4238 | ||
4239 | /* Match a PROCEDURE declaration (R1211). */ | |
4240 | ||
4241 | static match | |
4242 | match_procedure_decl (void) | |
4243 | { | |
4244 | match m; | |
4245 | gfc_symbol *sym, *proc_if = NULL; | |
4246 | int num; | |
4247 | gfc_expr *initializer = NULL; | |
4248 | ||
4249 | /* Parse interface (with brackets). */ | |
4250 | m = match_procedure_interface (&proc_if); | |
4251 | if (m != MATCH_YES) | |
4252 | return m; | |
4253 | ||
4254 | /* Parse attributes (with colons). */ | |
af1a34ee | 4255 | m = match_attr_spec(); |
4256 | if (m == MATCH_ERROR) | |
4257 | return MATCH_ERROR; | |
4258 | ||
4259 | /* Get procedure symbols. */ | |
4260 | for(num=1;;num++) | |
4261 | { | |
af1a34ee | 4262 | m = gfc_match_symbol (&sym, 0); |
4263 | if (m == MATCH_NO) | |
4264 | goto syntax; | |
4265 | else if (m == MATCH_ERROR) | |
4266 | return m; | |
4267 | ||
4268 | /* Add current_attr to the symbol attributes. */ | |
4269 | if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
4270 | return MATCH_ERROR; | |
4271 | ||
4272 | if (sym->attr.is_bind_c) | |
4273 | { | |
4274 | /* Check for C1218. */ | |
4275 | if (!proc_if || !proc_if->attr.is_bind_c) | |
4276 | { | |
4277 | gfc_error ("BIND(C) attribute at %C requires " | |
4278 | "an interface with BIND(C)"); | |
4279 | return MATCH_ERROR; | |
4280 | } | |
4281 | /* Check for C1217. */ | |
4282 | if (has_name_equals && sym->attr.pointer) | |
4283 | { | |
4284 | gfc_error ("BIND(C) procedure with NAME may not have " | |
4285 | "POINTER attribute at %C"); | |
4286 | return MATCH_ERROR; | |
4287 | } | |
4288 | if (has_name_equals && sym->attr.dummy) | |
4289 | { | |
4290 | gfc_error ("Dummy procedure at %C may not have " | |
4291 | "BIND(C) attribute with NAME"); | |
4292 | return MATCH_ERROR; | |
4293 | } | |
4294 | /* Set binding label for BIND(C). */ | |
4295 | if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS) | |
4296 | return MATCH_ERROR; | |
4297 | } | |
4298 | ||
cad0ddcf | 4299 | if (gfc_add_external (&sym->attr, NULL) == FAILURE) |
af1a34ee | 4300 | return MATCH_ERROR; |
1e057e9b | 4301 | |
4302 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4303 | sym = sym->result; | |
4304 | ||
af1a34ee | 4305 | if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE) |
4306 | return MATCH_ERROR; | |
4307 | ||
4308 | /* Set interface. */ | |
4309 | if (proc_if != NULL) | |
f7d7a083 | 4310 | { |
13a834aa | 4311 | if (sym->ts.type != BT_UNKNOWN) |
4312 | { | |
4313 | gfc_error ("Procedure '%s' at %L already has basic type of %s", | |
4314 | sym->name, &gfc_current_locus, | |
4315 | gfc_basic_typename (sym->ts.type)); | |
4316 | return MATCH_ERROR; | |
4317 | } | |
2cd2bb5c | 4318 | sym->ts.interface = proc_if; |
f7d7a083 | 4319 | sym->attr.untyped = 1; |
180a5dc0 | 4320 | sym->attr.if_source = IFSRC_IFBODY; |
f7d7a083 | 4321 | } |
af1a34ee | 4322 | else if (current_ts.type != BT_UNKNOWN) |
4323 | { | |
13a834aa | 4324 | if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) |
4325 | return MATCH_ERROR; | |
2cd2bb5c | 4326 | sym->ts.interface = gfc_new_symbol ("", gfc_current_ns); |
4327 | sym->ts.interface->ts = current_ts; | |
4328 | sym->ts.interface->attr.function = 1; | |
4329 | sym->attr.function = sym->ts.interface->attr.function; | |
180a5dc0 | 4330 | sym->attr.if_source = IFSRC_UNKNOWN; |
af1a34ee | 4331 | } |
4332 | ||
cad0ddcf | 4333 | if (gfc_match (" =>") == MATCH_YES) |
4334 | { | |
4335 | if (!current_attr.pointer) | |
4336 | { | |
4337 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
4338 | m = MATCH_ERROR; | |
4339 | goto cleanup; | |
4340 | } | |
4341 | ||
4342 | m = gfc_match_null (&initializer); | |
4343 | if (m == MATCH_NO) | |
4344 | { | |
4345 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4346 | m = MATCH_ERROR; | |
4347 | } | |
4348 | ||
4349 | if (gfc_pure (NULL)) | |
4350 | { | |
4351 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4352 | "a PURE procedure"); | |
4353 | m = MATCH_ERROR; | |
4354 | } | |
4355 | ||
4356 | if (m != MATCH_YES) | |
4357 | goto cleanup; | |
4358 | ||
4359 | if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus) | |
4360 | != SUCCESS) | |
4361 | goto cleanup; | |
4362 | ||
4363 | } | |
4364 | ||
4365 | gfc_set_sym_referenced (sym); | |
4366 | ||
af1a34ee | 4367 | if (gfc_match_eos () == MATCH_YES) |
4368 | return MATCH_YES; | |
4369 | if (gfc_match_char (',') != MATCH_YES) | |
4370 | goto syntax; | |
4371 | } | |
4372 | ||
4373 | syntax: | |
4374 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4375 | return MATCH_ERROR; | |
cad0ddcf | 4376 | |
4377 | cleanup: | |
4378 | /* Free stuff up and return. */ | |
4379 | gfc_free_expr (initializer); | |
4380 | return m; | |
af1a34ee | 4381 | } |
4382 | ||
4383 | ||
64e93293 | 4384 | static match |
4385 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc); | |
4386 | ||
4387 | ||
4388 | /* Match a procedure pointer component declaration (R445). */ | |
4389 | ||
4390 | static match | |
4391 | match_ppc_decl (void) | |
4392 | { | |
4393 | match m; | |
4394 | gfc_symbol *proc_if = NULL; | |
4395 | gfc_typespec ts; | |
4396 | int num; | |
4397 | gfc_component *c; | |
4398 | gfc_expr *initializer = NULL; | |
4399 | gfc_typebound_proc* tb; | |
4400 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4401 | ||
4402 | /* Parse interface (with brackets). */ | |
4403 | m = match_procedure_interface (&proc_if); | |
4404 | if (m != MATCH_YES) | |
4405 | goto syntax; | |
4406 | ||
4407 | /* Parse attributes. */ | |
4408 | tb = XCNEW (gfc_typebound_proc); | |
4409 | tb->where = gfc_current_locus; | |
4410 | m = match_binding_attributes (tb, false, true); | |
4411 | if (m == MATCH_ERROR) | |
4412 | return m; | |
4413 | ||
64e93293 | 4414 | gfc_clear_attr (¤t_attr); |
4415 | current_attr.procedure = 1; | |
4416 | current_attr.proc_pointer = 1; | |
4417 | current_attr.access = tb->access; | |
4418 | current_attr.flavor = FL_PROCEDURE; | |
4419 | ||
4420 | /* Match the colons (required). */ | |
4421 | if (gfc_match (" ::") != MATCH_YES) | |
4422 | { | |
4423 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
4424 | return MATCH_ERROR; | |
4425 | } | |
4426 | ||
4427 | /* Check for C450. */ | |
4428 | if (!tb->nopass && proc_if == NULL) | |
4429 | { | |
4430 | gfc_error("NOPASS or explicit interface required at %C"); | |
4431 | return MATCH_ERROR; | |
4432 | } | |
4433 | ||
4434 | /* Match PPC names. */ | |
4435 | ts = current_ts; | |
4436 | for(num=1;;num++) | |
4437 | { | |
4438 | m = gfc_match_name (name); | |
4439 | if (m == MATCH_NO) | |
4440 | goto syntax; | |
4441 | else if (m == MATCH_ERROR) | |
4442 | return m; | |
4443 | ||
4444 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
4445 | return MATCH_ERROR; | |
4446 | ||
4447 | /* Add current_attr to the symbol attributes. */ | |
4448 | if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE) | |
4449 | return MATCH_ERROR; | |
4450 | ||
4451 | if (gfc_add_external (&c->attr, NULL) == FAILURE) | |
4452 | return MATCH_ERROR; | |
4453 | ||
4454 | if (gfc_add_proc (&c->attr, name, NULL) == FAILURE) | |
4455 | return MATCH_ERROR; | |
4456 | ||
fe9b08a2 | 4457 | c->tb = tb; |
4458 | ||
64e93293 | 4459 | /* Set interface. */ |
4460 | if (proc_if != NULL) | |
4461 | { | |
4462 | c->ts.interface = proc_if; | |
4463 | c->attr.untyped = 1; | |
4464 | c->attr.if_source = IFSRC_IFBODY; | |
4465 | } | |
4466 | else if (ts.type != BT_UNKNOWN) | |
4467 | { | |
4468 | c->ts = ts; | |
4469 | c->ts.interface = gfc_new_symbol ("", gfc_current_ns); | |
4470 | c->ts.interface->ts = ts; | |
4471 | c->ts.interface->attr.function = 1; | |
4472 | c->attr.function = c->ts.interface->attr.function; | |
4473 | c->attr.if_source = IFSRC_UNKNOWN; | |
4474 | } | |
4475 | ||
4476 | if (gfc_match (" =>") == MATCH_YES) | |
4477 | { | |
4478 | m = gfc_match_null (&initializer); | |
4479 | if (m == MATCH_NO) | |
4480 | { | |
4481 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4482 | m = MATCH_ERROR; | |
4483 | } | |
4484 | if (gfc_pure (NULL)) | |
4485 | { | |
4486 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4487 | "a PURE procedure"); | |
4488 | m = MATCH_ERROR; | |
4489 | } | |
4490 | if (m != MATCH_YES) | |
4491 | { | |
4492 | gfc_free_expr (initializer); | |
4493 | return m; | |
4494 | } | |
4495 | c->initializer = initializer; | |
4496 | } | |
4497 | ||
4498 | if (gfc_match_eos () == MATCH_YES) | |
4499 | return MATCH_YES; | |
4500 | if (gfc_match_char (',') != MATCH_YES) | |
4501 | goto syntax; | |
4502 | } | |
4503 | ||
4504 | syntax: | |
4505 | gfc_error ("Syntax error in procedure pointer component at %C"); | |
4506 | return MATCH_ERROR; | |
4507 | } | |
4508 | ||
4509 | ||
af1a34ee | 4510 | /* Match a PROCEDURE declaration inside an interface (R1206). */ |
4511 | ||
4512 | static match | |
4513 | match_procedure_in_interface (void) | |
4514 | { | |
4515 | match m; | |
4516 | gfc_symbol *sym; | |
4517 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4518 | ||
4519 | if (current_interface.type == INTERFACE_NAMELESS | |
4520 | || current_interface.type == INTERFACE_ABSTRACT) | |
4521 | { | |
4522 | gfc_error ("PROCEDURE at %C must be in a generic interface"); | |
4523 | return MATCH_ERROR; | |
4524 | } | |
4525 | ||
4526 | for(;;) | |
4527 | { | |
4528 | m = gfc_match_name (name); | |
4529 | if (m == MATCH_NO) | |
4530 | goto syntax; | |
4531 | else if (m == MATCH_ERROR) | |
4532 | return m; | |
4533 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
4534 | return MATCH_ERROR; | |
4535 | ||
4536 | if (gfc_add_interface (sym) == FAILURE) | |
4537 | return MATCH_ERROR; | |
4538 | ||
af1a34ee | 4539 | if (gfc_match_eos () == MATCH_YES) |
4540 | break; | |
4541 | if (gfc_match_char (',') != MATCH_YES) | |
4542 | goto syntax; | |
4543 | } | |
4544 | ||
4545 | return MATCH_YES; | |
4546 | ||
4547 | syntax: | |
4548 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4549 | return MATCH_ERROR; | |
4550 | } | |
4551 | ||
4552 | ||
4553 | /* General matcher for PROCEDURE declarations. */ | |
4554 | ||
7fd88f6e | 4555 | static match match_procedure_in_type (void); |
4556 | ||
af1a34ee | 4557 | match |
4558 | gfc_match_procedure (void) | |
4559 | { | |
4560 | match m; | |
4561 | ||
4562 | switch (gfc_current_state ()) | |
4563 | { | |
4564 | case COMP_NONE: | |
4565 | case COMP_PROGRAM: | |
4566 | case COMP_MODULE: | |
4567 | case COMP_SUBROUTINE: | |
4568 | case COMP_FUNCTION: | |
4569 | m = match_procedure_decl (); | |
4570 | break; | |
4571 | case COMP_INTERFACE: | |
4572 | m = match_procedure_in_interface (); | |
4573 | break; | |
4574 | case COMP_DERIVED: | |
64e93293 | 4575 | m = match_ppc_decl (); |
4576 | break; | |
7fd88f6e | 4577 | case COMP_DERIVED_CONTAINS: |
4578 | m = match_procedure_in_type (); | |
4579 | break; | |
af1a34ee | 4580 | default: |
4581 | return MATCH_NO; | |
4582 | } | |
4583 | ||
4584 | if (m != MATCH_YES) | |
4585 | return m; | |
4586 | ||
4587 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C") | |
4588 | == FAILURE) | |
4589 | return MATCH_ERROR; | |
4590 | ||
4591 | return m; | |
4592 | } | |
4593 | ||
4594 | ||
a34926ba | 4595 | /* Warn if a matched procedure has the same name as an intrinsic; this is |
4596 | simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current | |
4597 | parser-state-stack to find out whether we're in a module. */ | |
4598 | ||
4599 | static void | |
4600 | warn_intrinsic_shadow (const gfc_symbol* sym, bool func) | |
4601 | { | |
4602 | bool in_module; | |
4603 | ||
4604 | in_module = (gfc_state_stack->previous | |
4605 | && gfc_state_stack->previous->state == COMP_MODULE); | |
4606 | ||
4607 | gfc_warn_intrinsic_shadow (sym, in_module, func); | |
4608 | } | |
4609 | ||
4610 | ||
4ee9c684 | 4611 | /* Match a function declaration. */ |
4612 | ||
4613 | match | |
4614 | gfc_match_function_decl (void) | |
4615 | { | |
4616 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4617 | gfc_symbol *sym, *result; | |
4618 | locus old_loc; | |
4619 | match m; | |
c5d33754 | 4620 | match suffix_match; |
4621 | match found_match; /* Status returned by match func. */ | |
4ee9c684 | 4622 | |
4623 | if (gfc_current_state () != COMP_NONE | |
4624 | && gfc_current_state () != COMP_INTERFACE | |
4625 | && gfc_current_state () != COMP_CONTAINS) | |
4626 | return MATCH_NO; | |
4627 | ||
4628 | gfc_clear_ts (¤t_ts); | |
4629 | ||
cbb9e6aa | 4630 | old_loc = gfc_current_locus; |
4ee9c684 | 4631 | |
077932f9 | 4632 | m = gfc_match_prefix (¤t_ts); |
4ee9c684 | 4633 | if (m != MATCH_YES) |
4634 | { | |
cbb9e6aa | 4635 | gfc_current_locus = old_loc; |
4ee9c684 | 4636 | return m; |
4637 | } | |
4638 | ||
4639 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
4640 | { | |
cbb9e6aa | 4641 | gfc_current_locus = old_loc; |
4ee9c684 | 4642 | return MATCH_NO; |
4643 | } | |
d77f260f | 4644 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 4645 | return MATCH_ERROR; |
1e057e9b | 4646 | |
4647 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4648 | sym = sym->result; | |
4649 | ||
4ee9c684 | 4650 | gfc_new_block = sym; |
4651 | ||
4652 | m = gfc_match_formal_arglist (sym, 0, 0); | |
4653 | if (m == MATCH_NO) | |
9b435b6d | 4654 | { |
4655 | gfc_error ("Expected formal argument list in function " | |
1a9745d2 | 4656 | "definition at %C"); |
9b435b6d | 4657 | m = MATCH_ERROR; |
4658 | goto cleanup; | |
4659 | } | |
4ee9c684 | 4660 | else if (m == MATCH_ERROR) |
4661 | goto cleanup; | |
4662 | ||
4663 | result = NULL; | |
4664 | ||
c5d33754 | 4665 | /* According to the draft, the bind(c) and result clause can |
4666 | come in either order after the formal_arg_list (i.e., either | |
4667 | can be first, both can exist together or by themselves or neither | |
4668 | one). Therefore, the match_result can't match the end of the | |
4669 | string, and check for the bind(c) or result clause in either order. */ | |
4670 | found_match = gfc_match_eos (); | |
4671 | ||
4672 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
4673 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4674 | not allowed for procedures. */ | |
4675 | if (sym->attr.is_bind_c == 1) | |
4676 | { | |
4677 | sym->attr.is_bind_c = 0; | |
4678 | if (sym->old_symbol != NULL) | |
4679 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4680 | "variables or common blocks", | |
4681 | &(sym->old_symbol->declared_at)); | |
4682 | else | |
4683 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4684 | "variables or common blocks", &gfc_current_locus); | |
4ee9c684 | 4685 | } |
4686 | ||
c5d33754 | 4687 | if (found_match != MATCH_YES) |
4ee9c684 | 4688 | { |
c5d33754 | 4689 | /* If we haven't found the end-of-statement, look for a suffix. */ |
4690 | suffix_match = gfc_match_suffix (sym, &result); | |
4691 | if (suffix_match == MATCH_YES) | |
4692 | /* Need to get the eos now. */ | |
4693 | found_match = gfc_match_eos (); | |
4694 | else | |
4695 | found_match = suffix_match; | |
4ee9c684 | 4696 | } |
4697 | ||
c5d33754 | 4698 | if(found_match != MATCH_YES) |
4699 | m = MATCH_ERROR; | |
4ee9c684 | 4700 | else |
4701 | { | |
c5d33754 | 4702 | /* Make changes to the symbol. */ |
4703 | m = MATCH_ERROR; | |
4704 | ||
4705 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) | |
4706 | goto cleanup; | |
4707 | ||
4708 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
4709 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4710 | goto cleanup; | |
4ee9c684 | 4711 | |
8d39570e | 4712 | /* Delay matching the function characteristics until after the |
077932f9 | 4713 | specification block by signalling kind=-1. */ |
8d39570e | 4714 | sym->declared_at = old_loc; |
4715 | if (current_ts.type != BT_UNKNOWN) | |
4716 | current_ts.kind = -1; | |
4717 | else | |
4718 | current_ts.kind = 0; | |
077932f9 | 4719 | |
c5d33754 | 4720 | if (result == NULL) |
4721 | { | |
0477d42d | 4722 | if (current_ts.type != BT_UNKNOWN |
4723 | && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) | |
4724 | goto cleanup; | |
c5d33754 | 4725 | sym->result = sym; |
4726 | } | |
4727 | else | |
4728 | { | |
0477d42d | 4729 | if (current_ts.type != BT_UNKNOWN |
4730 | && gfc_add_type (result, ¤t_ts, &gfc_current_locus) | |
4731 | == FAILURE) | |
4732 | goto cleanup; | |
c5d33754 | 4733 | sym->result = result; |
4734 | } | |
4735 | ||
a34926ba | 4736 | /* Warn if this procedure has the same name as an intrinsic. */ |
4737 | warn_intrinsic_shadow (sym, true); | |
4738 | ||
c5d33754 | 4739 | return MATCH_YES; |
4740 | } | |
4ee9c684 | 4741 | |
4742 | cleanup: | |
cbb9e6aa | 4743 | gfc_current_locus = old_loc; |
4ee9c684 | 4744 | return m; |
4745 | } | |
4746 | ||
1a9745d2 | 4747 | |
4748 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
4749 | pass the name of the entry, rather than the gfc_current_block name, and | |
4750 | to return false upon finding an existing global entry. */ | |
858f9894 | 4751 | |
4752 | static bool | |
1a9745d2 | 4753 | add_global_entry (const char *name, int sub) |
858f9894 | 4754 | { |
4755 | gfc_gsymbol *s; | |
8458f4ca | 4756 | enum gfc_symbol_type type; |
858f9894 | 4757 | |
4758 | s = gfc_get_gsymbol(name); | |
5b11d932 | 4759 | type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; |
858f9894 | 4760 | |
4761 | if (s->defined | |
1a9745d2 | 4762 | || (s->type != GSYM_UNKNOWN |
5b11d932 | 4763 | && s->type != type)) |
cbbac028 | 4764 | gfc_global_used(s, NULL); |
858f9894 | 4765 | else |
4766 | { | |
5b11d932 | 4767 | s->type = type; |
858f9894 | 4768 | s->where = gfc_current_locus; |
4769 | s->defined = 1; | |
83aeedb9 | 4770 | s->ns = gfc_current_ns; |
858f9894 | 4771 | return true; |
4772 | } | |
4773 | return false; | |
4774 | } | |
4ee9c684 | 4775 | |
1a9745d2 | 4776 | |
4ee9c684 | 4777 | /* Match an ENTRY statement. */ |
4778 | ||
4779 | match | |
4780 | gfc_match_entry (void) | |
4781 | { | |
1b716045 | 4782 | gfc_symbol *proc; |
4783 | gfc_symbol *result; | |
4784 | gfc_symbol *entry; | |
4ee9c684 | 4785 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
4786 | gfc_compile_state state; | |
4787 | match m; | |
1b716045 | 4788 | gfc_entry_list *el; |
7b5e1acc | 4789 | locus old_loc; |
d77f260f | 4790 | bool module_procedure; |
86f0974b | 4791 | char peek_char; |
4792 | match is_bind_c; | |
4ee9c684 | 4793 | |
4794 | m = gfc_match_name (name); | |
4795 | if (m != MATCH_YES) | |
4796 | return m; | |
4797 | ||
1b716045 | 4798 | state = gfc_current_state (); |
ea37f786 | 4799 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
1b716045 | 4800 | { |
ea37f786 | 4801 | switch (state) |
4802 | { | |
4803 | case COMP_PROGRAM: | |
4804 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
4805 | break; | |
4806 | case COMP_MODULE: | |
4807 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
4808 | break; | |
4809 | case COMP_BLOCK_DATA: | |
1a9745d2 | 4810 | gfc_error ("ENTRY statement at %C cannot appear within " |
4811 | "a BLOCK DATA"); | |
ea37f786 | 4812 | break; |
4813 | case COMP_INTERFACE: | |
1a9745d2 | 4814 | gfc_error ("ENTRY statement at %C cannot appear within " |
4815 | "an INTERFACE"); | |
ea37f786 | 4816 | break; |
4817 | case COMP_DERIVED: | |
1a9745d2 | 4818 | gfc_error ("ENTRY statement at %C cannot appear within " |
4819 | "a DERIVED TYPE block"); | |
ea37f786 | 4820 | break; |
4821 | case COMP_IF: | |
1a9745d2 | 4822 | gfc_error ("ENTRY statement at %C cannot appear within " |
4823 | "an IF-THEN block"); | |
ea37f786 | 4824 | break; |
4825 | case COMP_DO: | |
1a9745d2 | 4826 | gfc_error ("ENTRY statement at %C cannot appear within " |
4827 | "a DO block"); | |
ea37f786 | 4828 | break; |
4829 | case COMP_SELECT: | |
1a9745d2 | 4830 | gfc_error ("ENTRY statement at %C cannot appear within " |
4831 | "a SELECT block"); | |
ea37f786 | 4832 | break; |
4833 | case COMP_FORALL: | |
1a9745d2 | 4834 | gfc_error ("ENTRY statement at %C cannot appear within " |
4835 | "a FORALL block"); | |
ea37f786 | 4836 | break; |
4837 | case COMP_WHERE: | |
1a9745d2 | 4838 | gfc_error ("ENTRY statement at %C cannot appear within " |
4839 | "a WHERE block"); | |
ea37f786 | 4840 | break; |
4841 | case COMP_CONTAINS: | |
1a9745d2 | 4842 | gfc_error ("ENTRY statement at %C cannot appear within " |
4843 | "a contained subprogram"); | |
ea37f786 | 4844 | break; |
4845 | default: | |
4846 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
4847 | } | |
1b716045 | 4848 | return MATCH_ERROR; |
4849 | } | |
4850 | ||
d77f260f | 4851 | module_procedure = gfc_current_ns->parent != NULL |
1a9745d2 | 4852 | && gfc_current_ns->parent->proc_name |
4853 | && gfc_current_ns->parent->proc_name->attr.flavor | |
4854 | == FL_MODULE; | |
d77f260f | 4855 | |
1b716045 | 4856 | if (gfc_current_ns->parent != NULL |
4857 | && gfc_current_ns->parent->proc_name | |
d77f260f | 4858 | && !module_procedure) |
1b716045 | 4859 | { |
4860 | gfc_error("ENTRY statement at %C cannot appear in a " | |
4861 | "contained procedure"); | |
4862 | return MATCH_ERROR; | |
4863 | } | |
4864 | ||
d77f260f | 4865 | /* Module function entries need special care in get_proc_name |
4866 | because previous references within the function will have | |
4867 | created symbols attached to the current namespace. */ | |
4868 | if (get_proc_name (name, &entry, | |
4869 | gfc_current_ns->parent != NULL | |
c1e4695a | 4870 | && module_procedure)) |
4ee9c684 | 4871 | return MATCH_ERROR; |
4872 | ||
1b716045 | 4873 | proc = gfc_current_block (); |
4874 | ||
86f0974b | 4875 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
4876 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4877 | not allowed for procedures. */ | |
4878 | if (entry->attr.is_bind_c == 1) | |
4879 | { | |
4880 | entry->attr.is_bind_c = 0; | |
4881 | if (entry->old_symbol != NULL) | |
4882 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4883 | "variables or common blocks", | |
4884 | &(entry->old_symbol->declared_at)); | |
4885 | else | |
4886 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4887 | "variables or common blocks", &gfc_current_locus); | |
4888 | } | |
4889 | ||
4890 | /* Check what next non-whitespace character is so we can tell if there | |
4891 | is the required parens if we have a BIND(C). */ | |
4892 | gfc_gobble_whitespace (); | |
e0be6f02 | 4893 | peek_char = gfc_peek_ascii_char (); |
86f0974b | 4894 | |
1b716045 | 4895 | if (state == COMP_SUBROUTINE) |
4ee9c684 | 4896 | { |
950683ed | 4897 | /* An entry in a subroutine. */ |
8cafc742 | 4898 | if (!gfc_current_ns->parent && !add_global_entry (name, 1)) |
858f9894 | 4899 | return MATCH_ERROR; |
4900 | ||
4ee9c684 | 4901 | m = gfc_match_formal_arglist (entry, 0, 1); |
4902 | if (m != MATCH_YES) | |
4903 | return MATCH_ERROR; | |
4904 | ||
75ae7f6c | 4905 | /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can |
4906 | never be an internal procedure. */ | |
4907 | is_bind_c = gfc_match_bind_c (entry, true); | |
86f0974b | 4908 | if (is_bind_c == MATCH_ERROR) |
4909 | return MATCH_ERROR; | |
4910 | if (is_bind_c == MATCH_YES) | |
4911 | { | |
4912 | if (peek_char != '(') | |
4913 | { | |
4914 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
4915 | return MATCH_ERROR; | |
4916 | } | |
4917 | if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1) | |
4918 | == FAILURE) | |
4919 | return MATCH_ERROR; | |
4920 | } | |
4921 | ||
950683ed | 4922 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4923 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 4924 | return MATCH_ERROR; |
1b716045 | 4925 | } |
4926 | else | |
4927 | { | |
7b5e1acc | 4928 | /* An entry in a function. |
1a9745d2 | 4929 | We need to take special care because writing |
4930 | ENTRY f() | |
4931 | as | |
4932 | ENTRY f | |
4933 | is allowed, whereas | |
4934 | ENTRY f() RESULT (r) | |
4935 | can't be written as | |
4936 | ENTRY f RESULT (r). */ | |
8cafc742 | 4937 | if (!gfc_current_ns->parent && !add_global_entry (name, 0)) |
858f9894 | 4938 | return MATCH_ERROR; |
4939 | ||
7b5e1acc | 4940 | old_loc = gfc_current_locus; |
4941 | if (gfc_match_eos () == MATCH_YES) | |
4942 | { | |
4943 | gfc_current_locus = old_loc; | |
4944 | /* Match the empty argument list, and add the interface to | |
4945 | the symbol. */ | |
4946 | m = gfc_match_formal_arglist (entry, 0, 1); | |
4947 | } | |
4948 | else | |
4949 | m = gfc_match_formal_arglist (entry, 0, 0); | |
4950 | ||
4ee9c684 | 4951 | if (m != MATCH_YES) |
4952 | return MATCH_ERROR; | |
4953 | ||
4ee9c684 | 4954 | result = NULL; |
4955 | ||
4956 | if (gfc_match_eos () == MATCH_YES) | |
4957 | { | |
950683ed | 4958 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4959 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 4960 | return MATCH_ERROR; |
4961 | ||
c6871095 | 4962 | entry->result = entry; |
4ee9c684 | 4963 | } |
4964 | else | |
4965 | { | |
86f0974b | 4966 | m = gfc_match_suffix (entry, &result); |
4ee9c684 | 4967 | if (m == MATCH_NO) |
4968 | gfc_syntax_error (ST_ENTRY); | |
4969 | if (m != MATCH_YES) | |
4970 | return MATCH_ERROR; | |
4971 | ||
86f0974b | 4972 | if (result) |
4973 | { | |
4974 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE | |
4975 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
4976 | || gfc_add_function (&entry->attr, result->name, NULL) | |
4977 | == FAILURE) | |
4978 | return MATCH_ERROR; | |
4979 | entry->result = result; | |
4980 | } | |
4981 | else | |
4982 | { | |
4983 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE | |
4984 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
4985 | return MATCH_ERROR; | |
4986 | entry->result = entry; | |
4987 | } | |
4ee9c684 | 4988 | } |
4ee9c684 | 4989 | } |
4990 | ||
4991 | if (gfc_match_eos () != MATCH_YES) | |
4992 | { | |
4993 | gfc_syntax_error (ST_ENTRY); | |
4994 | return MATCH_ERROR; | |
4995 | } | |
4996 | ||
1b716045 | 4997 | entry->attr.recursive = proc->attr.recursive; |
4998 | entry->attr.elemental = proc->attr.elemental; | |
4999 | entry->attr.pure = proc->attr.pure; | |
4ee9c684 | 5000 | |
1b716045 | 5001 | el = gfc_get_entry_list (); |
5002 | el->sym = entry; | |
5003 | el->next = gfc_current_ns->entries; | |
5004 | gfc_current_ns->entries = el; | |
5005 | if (el->next) | |
5006 | el->id = el->next->id + 1; | |
5007 | else | |
5008 | el->id = 1; | |
4ee9c684 | 5009 | |
1b716045 | 5010 | new_st.op = EXEC_ENTRY; |
5011 | new_st.ext.entry = el; | |
5012 | ||
5013 | return MATCH_YES; | |
4ee9c684 | 5014 | } |
5015 | ||
5016 | ||
5017 | /* Match a subroutine statement, including optional prefixes. */ | |
5018 | ||
5019 | match | |
5020 | gfc_match_subroutine (void) | |
5021 | { | |
5022 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5023 | gfc_symbol *sym; | |
5024 | match m; | |
c5d33754 | 5025 | match is_bind_c; |
5026 | char peek_char; | |
75ae7f6c | 5027 | bool allow_binding_name; |
4ee9c684 | 5028 | |
5029 | if (gfc_current_state () != COMP_NONE | |
5030 | && gfc_current_state () != COMP_INTERFACE | |
5031 | && gfc_current_state () != COMP_CONTAINS) | |
5032 | return MATCH_NO; | |
5033 | ||
077932f9 | 5034 | m = gfc_match_prefix (NULL); |
4ee9c684 | 5035 | if (m != MATCH_YES) |
5036 | return m; | |
5037 | ||
5038 | m = gfc_match ("subroutine% %n", name); | |
5039 | if (m != MATCH_YES) | |
5040 | return m; | |
5041 | ||
d77f260f | 5042 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 5043 | return MATCH_ERROR; |
1e057e9b | 5044 | |
5045 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
5046 | sym = sym->result; | |
5047 | ||
4ee9c684 | 5048 | gfc_new_block = sym; |
5049 | ||
c5d33754 | 5050 | /* Check what next non-whitespace character is so we can tell if there |
86f0974b | 5051 | is the required parens if we have a BIND(C). */ |
c5d33754 | 5052 | gfc_gobble_whitespace (); |
e0be6f02 | 5053 | peek_char = gfc_peek_ascii_char (); |
c5d33754 | 5054 | |
950683ed | 5055 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
4ee9c684 | 5056 | return MATCH_ERROR; |
5057 | ||
5058 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
5059 | return MATCH_ERROR; | |
5060 | ||
c5d33754 | 5061 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
5062 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
5063 | not allowed for procedures. */ | |
5064 | if (sym->attr.is_bind_c == 1) | |
5065 | { | |
5066 | sym->attr.is_bind_c = 0; | |
5067 | if (sym->old_symbol != NULL) | |
5068 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5069 | "variables or common blocks", | |
5070 | &(sym->old_symbol->declared_at)); | |
5071 | else | |
5072 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5073 | "variables or common blocks", &gfc_current_locus); | |
5074 | } | |
75ae7f6c | 5075 | |
5076 | /* C binding names are not allowed for internal procedures. */ | |
5077 | if (gfc_current_state () == COMP_CONTAINS | |
5078 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
5079 | allow_binding_name = false; | |
5080 | else | |
5081 | allow_binding_name = true; | |
5082 | ||
c5d33754 | 5083 | /* Here, we are just checking if it has the bind(c) attribute, and if |
5084 | so, then we need to make sure it's all correct. If it doesn't, | |
5085 | we still need to continue matching the rest of the subroutine line. */ | |
75ae7f6c | 5086 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 5087 | if (is_bind_c == MATCH_ERROR) |
5088 | { | |
5089 | /* There was an attempt at the bind(c), but it was wrong. An | |
5090 | error message should have been printed w/in the gfc_match_bind_c | |
5091 | so here we'll just return the MATCH_ERROR. */ | |
5092 | return MATCH_ERROR; | |
5093 | } | |
5094 | ||
5095 | if (is_bind_c == MATCH_YES) | |
5096 | { | |
75ae7f6c | 5097 | /* The following is allowed in the Fortran 2008 draft. */ |
4518e961 | 5098 | if (gfc_current_state () == COMP_CONTAINS |
75ae7f6c | 5099 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
2dcae6c7 | 5100 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
5101 | "at %L may not be specified for an internal " | |
5102 | "procedure", &gfc_current_locus) | |
75ae7f6c | 5103 | == FAILURE) |
5104 | return MATCH_ERROR; | |
5105 | ||
c5d33754 | 5106 | if (peek_char != '(') |
5107 | { | |
5108 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
5109 | return MATCH_ERROR; | |
5110 | } | |
5111 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) | |
5112 | == FAILURE) | |
5113 | return MATCH_ERROR; | |
5114 | } | |
5115 | ||
4ee9c684 | 5116 | if (gfc_match_eos () != MATCH_YES) |
5117 | { | |
5118 | gfc_syntax_error (ST_SUBROUTINE); | |
5119 | return MATCH_ERROR; | |
5120 | } | |
5121 | ||
5122 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
5123 | return MATCH_ERROR; | |
5124 | ||
a34926ba | 5125 | /* Warn if it has the same name as an intrinsic. */ |
5126 | warn_intrinsic_shadow (sym, false); | |
5127 | ||
4ee9c684 | 5128 | return MATCH_YES; |
5129 | } | |
5130 | ||
5131 | ||
c5d33754 | 5132 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
5133 | given, and set the binding label in either the given symbol (if not | |
a0527218 | 5134 | NULL), or in the current_ts. The symbol may be NULL because we may |
c5d33754 | 5135 | encounter the BIND(C) before the declaration itself. Return |
5136 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, | |
5137 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, | |
5138 | or MATCH_YES if the specifier was correct and the binding label and | |
5139 | bind(c) fields were set correctly for the given symbol or the | |
75ae7f6c | 5140 | current_ts. If allow_binding_name is false, no binding name may be |
5141 | given. */ | |
c5d33754 | 5142 | |
5143 | match | |
75ae7f6c | 5144 | gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name) |
c5d33754 | 5145 | { |
5146 | /* binding label, if exists */ | |
5147 | char binding_label[GFC_MAX_SYMBOL_LEN + 1]; | |
5148 | match double_quote; | |
5149 | match single_quote; | |
c5d33754 | 5150 | |
5151 | /* Initialize the flag that specifies whether we encountered a NAME= | |
5152 | specifier or not. */ | |
5153 | has_name_equals = 0; | |
5154 | ||
5155 | /* Init the first char to nil so we can catch if we don't have | |
5156 | the label (name attr) or the symbol name yet. */ | |
5157 | binding_label[0] = '\0'; | |
5158 | ||
5159 | /* This much we have to be able to match, in this order, if | |
5160 | there is a bind(c) label. */ | |
5161 | if (gfc_match (" bind ( c ") != MATCH_YES) | |
5162 | return MATCH_NO; | |
5163 | ||
5164 | /* Now see if there is a binding label, or if we've reached the | |
5165 | end of the bind(c) attribute without one. */ | |
5166 | if (gfc_match_char (',') == MATCH_YES) | |
5167 | { | |
5168 | if (gfc_match (" name = ") != MATCH_YES) | |
5169 | { | |
5170 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5171 | "at %C"); | |
5172 | /* should give an error message here */ | |
5173 | return MATCH_ERROR; | |
5174 | } | |
5175 | ||
5176 | has_name_equals = 1; | |
5177 | ||
5178 | /* Get the opening quote. */ | |
5179 | double_quote = MATCH_YES; | |
5180 | single_quote = MATCH_YES; | |
5181 | double_quote = gfc_match_char ('"'); | |
5182 | if (double_quote != MATCH_YES) | |
5183 | single_quote = gfc_match_char ('\''); | |
5184 | if (double_quote != MATCH_YES && single_quote != MATCH_YES) | |
5185 | { | |
5186 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5187 | "at %C"); | |
5188 | return MATCH_ERROR; | |
5189 | } | |
5190 | ||
5191 | /* Grab the binding label, using functions that will not lower | |
5192 | case the names automatically. */ | |
5193 | if (gfc_match_name_C (binding_label) != MATCH_YES) | |
5194 | return MATCH_ERROR; | |
5195 | ||
5196 | /* Get the closing quotation. */ | |
5197 | if (double_quote == MATCH_YES) | |
5198 | { | |
5199 | if (gfc_match_char ('"') != MATCH_YES) | |
5200 | { | |
5201 | gfc_error ("Missing closing quote '\"' for binding label at %C"); | |
5202 | /* User started string with '"' so looked to match it. */ | |
5203 | return MATCH_ERROR; | |
5204 | } | |
5205 | } | |
5206 | else | |
5207 | { | |
5208 | if (gfc_match_char ('\'') != MATCH_YES) | |
5209 | { | |
5210 | gfc_error ("Missing closing quote '\'' for binding label at %C"); | |
5211 | /* User started string with "'" char. */ | |
5212 | return MATCH_ERROR; | |
5213 | } | |
5214 | } | |
5215 | } | |
5216 | ||
5217 | /* Get the required right paren. */ | |
5218 | if (gfc_match_char (')') != MATCH_YES) | |
5219 | { | |
5220 | gfc_error ("Missing closing paren for binding label at %C"); | |
5221 | return MATCH_ERROR; | |
5222 | } | |
5223 | ||
75ae7f6c | 5224 | if (has_name_equals && !allow_binding_name) |
5225 | { | |
5226 | gfc_error ("No binding name is allowed in BIND(C) at %C"); | |
5227 | return MATCH_ERROR; | |
5228 | } | |
5229 | ||
5230 | if (has_name_equals && sym != NULL && sym->attr.dummy) | |
5231 | { | |
5232 | gfc_error ("For dummy procedure %s, no binding name is " | |
5233 | "allowed in BIND(C) at %C", sym->name); | |
5234 | return MATCH_ERROR; | |
5235 | } | |
5236 | ||
5237 | ||
c5d33754 | 5238 | /* Save the binding label to the symbol. If sym is null, we're |
5239 | probably matching the typespec attributes of a declaration and | |
5240 | haven't gotten the name yet, and therefore, no symbol yet. */ | |
5241 | if (binding_label[0] != '\0') | |
5242 | { | |
5243 | if (sym != NULL) | |
5244 | { | |
b1223b39 | 5245 | strcpy (sym->binding_label, binding_label); |
c5d33754 | 5246 | } |
5247 | else | |
b1223b39 | 5248 | strcpy (curr_binding_label, binding_label); |
c5d33754 | 5249 | } |
75ae7f6c | 5250 | else if (allow_binding_name) |
c5d33754 | 5251 | { |
5252 | /* No binding label, but if symbol isn't null, we | |
75ae7f6c | 5253 | can set the label for it here. |
5254 | If name="" or allow_binding_name is false, no C binding name is | |
5255 | created. */ | |
c5d33754 | 5256 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) |
5257 | strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1); | |
5258 | } | |
94fa7146 | 5259 | |
5cf92482 | 5260 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
5261 | && current_interface.type == INTERFACE_ABSTRACT) | |
94fa7146 | 5262 | { |
5263 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); | |
5264 | return MATCH_ERROR; | |
5265 | } | |
5266 | ||
c5d33754 | 5267 | return MATCH_YES; |
5268 | } | |
5269 | ||
5270 | ||
231e961a | 5271 | /* Return nonzero if we're currently compiling a contained procedure. */ |
c0985832 | 5272 | |
5273 | static int | |
5274 | contained_procedure (void) | |
5275 | { | |
1c343287 | 5276 | gfc_state_data *s = gfc_state_stack; |
c0985832 | 5277 | |
1c343287 | 5278 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) |
5279 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) | |
5280 | return 1; | |
c0985832 | 5281 | |
5282 | return 0; | |
5283 | } | |
5284 | ||
e14bee04 | 5285 | /* Set the kind of each enumerator. The kind is selected such that it is |
3b6a4b41 | 5286 | interoperable with the corresponding C enumeration type, making |
5287 | sure that -fshort-enums is honored. */ | |
5288 | ||
5289 | static void | |
5290 | set_enum_kind(void) | |
5291 | { | |
5292 | enumerator_history *current_history = NULL; | |
5293 | int kind; | |
5294 | int i; | |
5295 | ||
5296 | if (max_enum == NULL || enum_history == NULL) | |
5297 | return; | |
5298 | ||
6f092e31 | 5299 | if (!flag_short_enums) |
e14bee04 | 5300 | return; |
5301 | ||
3b6a4b41 | 5302 | i = 0; |
5303 | do | |
5304 | { | |
5305 | kind = gfc_integer_kinds[i++].kind; | |
5306 | } | |
e14bee04 | 5307 | while (kind < gfc_c_int_kind |
3b6a4b41 | 5308 | && gfc_check_integer_range (max_enum->initializer->value.integer, |
5309 | kind) != ARITH_OK); | |
5310 | ||
5311 | current_history = enum_history; | |
5312 | while (current_history != NULL) | |
5313 | { | |
5314 | current_history->sym->ts.kind = kind; | |
5315 | current_history = current_history->next; | |
5316 | } | |
5317 | } | |
5318 | ||
1a9745d2 | 5319 | |
4ee9c684 | 5320 | /* Match any of the various end-block statements. Returns the type of |
5321 | END to the caller. The END INTERFACE, END IF, END DO and END | |
5322 | SELECT statements cannot be replaced by a single END statement. */ | |
5323 | ||
5324 | match | |
1a9745d2 | 5325 | gfc_match_end (gfc_statement *st) |
4ee9c684 | 5326 | { |
5327 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5328 | gfc_compile_state state; | |
5329 | locus old_loc; | |
5330 | const char *block_name; | |
5331 | const char *target; | |
c0985832 | 5332 | int eos_ok; |
4ee9c684 | 5333 | match m; |
5334 | ||
cbb9e6aa | 5335 | old_loc = gfc_current_locus; |
4ee9c684 | 5336 | if (gfc_match ("end") != MATCH_YES) |
5337 | return MATCH_NO; | |
5338 | ||
5339 | state = gfc_current_state (); | |
1a9745d2 | 5340 | block_name = gfc_current_block () == NULL |
5341 | ? NULL : gfc_current_block ()->name; | |
4ee9c684 | 5342 | |
7fd88f6e | 5343 | if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS) |
4ee9c684 | 5344 | { |
5345 | state = gfc_state_stack->previous->state; | |
1a9745d2 | 5346 | block_name = gfc_state_stack->previous->sym == NULL |
5347 | ? NULL : gfc_state_stack->previous->sym->name; | |
4ee9c684 | 5348 | } |
5349 | ||
5350 | switch (state) | |
5351 | { | |
5352 | case COMP_NONE: | |
5353 | case COMP_PROGRAM: | |
5354 | *st = ST_END_PROGRAM; | |
5355 | target = " program"; | |
c0985832 | 5356 | eos_ok = 1; |
4ee9c684 | 5357 | break; |
5358 | ||
5359 | case COMP_SUBROUTINE: | |
5360 | *st = ST_END_SUBROUTINE; | |
5361 | target = " subroutine"; | |
c0985832 | 5362 | eos_ok = !contained_procedure (); |
4ee9c684 | 5363 | break; |
5364 | ||
5365 | case COMP_FUNCTION: | |
5366 | *st = ST_END_FUNCTION; | |
5367 | target = " function"; | |
c0985832 | 5368 | eos_ok = !contained_procedure (); |
4ee9c684 | 5369 | break; |
5370 | ||
5371 | case COMP_BLOCK_DATA: | |
5372 | *st = ST_END_BLOCK_DATA; | |
5373 | target = " block data"; | |
c0985832 | 5374 | eos_ok = 1; |
4ee9c684 | 5375 | break; |
5376 | ||
5377 | case COMP_MODULE: | |
5378 | *st = ST_END_MODULE; | |
5379 | target = " module"; | |
c0985832 | 5380 | eos_ok = 1; |
4ee9c684 | 5381 | break; |
5382 | ||
5383 | case COMP_INTERFACE: | |
5384 | *st = ST_END_INTERFACE; | |
5385 | target = " interface"; | |
c0985832 | 5386 | eos_ok = 0; |
4ee9c684 | 5387 | break; |
5388 | ||
5389 | case COMP_DERIVED: | |
7fd88f6e | 5390 | case COMP_DERIVED_CONTAINS: |
4ee9c684 | 5391 | *st = ST_END_TYPE; |
5392 | target = " type"; | |
c0985832 | 5393 | eos_ok = 0; |
4ee9c684 | 5394 | break; |
5395 | ||
5396 | case COMP_IF: | |
5397 | *st = ST_ENDIF; | |
5398 | target = " if"; | |
c0985832 | 5399 | eos_ok = 0; |
4ee9c684 | 5400 | break; |
5401 | ||
5402 | case COMP_DO: | |
5403 | *st = ST_ENDDO; | |
5404 | target = " do"; | |
c0985832 | 5405 | eos_ok = 0; |
4ee9c684 | 5406 | break; |
5407 | ||
5408 | case COMP_SELECT: | |
5409 | *st = ST_END_SELECT; | |
5410 | target = " select"; | |
c0985832 | 5411 | eos_ok = 0; |
4ee9c684 | 5412 | break; |
5413 | ||
5414 | case COMP_FORALL: | |
5415 | *st = ST_END_FORALL; | |
5416 | target = " forall"; | |
c0985832 | 5417 | eos_ok = 0; |
4ee9c684 | 5418 | break; |
5419 | ||
5420 | case COMP_WHERE: | |
5421 | *st = ST_END_WHERE; | |
5422 | target = " where"; | |
c0985832 | 5423 | eos_ok = 0; |
4ee9c684 | 5424 | break; |
5425 | ||
3b6a4b41 | 5426 | case COMP_ENUM: |
5427 | *st = ST_END_ENUM; | |
5428 | target = " enum"; | |
5429 | eos_ok = 0; | |
5430 | last_initializer = NULL; | |
5431 | set_enum_kind (); | |
5432 | gfc_free_enum_history (); | |
5433 | break; | |
5434 | ||
4ee9c684 | 5435 | default: |
5436 | gfc_error ("Unexpected END statement at %C"); | |
5437 | goto cleanup; | |
5438 | } | |
5439 | ||
5440 | if (gfc_match_eos () == MATCH_YES) | |
5441 | { | |
c0985832 | 5442 | if (!eos_ok) |
4ee9c684 | 5443 | { |
f6d0e37a | 5444 | /* We would have required END [something]. */ |
d197c9ee | 5445 | gfc_error ("%s statement expected at %L", |
5446 | gfc_ascii_statement (*st), &old_loc); | |
4ee9c684 | 5447 | goto cleanup; |
5448 | } | |
5449 | ||
5450 | return MATCH_YES; | |
5451 | } | |
5452 | ||
5453 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
5454 | if (gfc_match (target) != MATCH_YES) | |
5455 | { | |
5456 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
5457 | goto cleanup; | |
5458 | } | |
5459 | ||
5460 | /* If we're at the end, make sure a block name wasn't required. */ | |
5461 | if (gfc_match_eos () == MATCH_YES) | |
5462 | { | |
5463 | ||
0d0ce415 | 5464 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT |
5465 | && *st != ST_END_FORALL && *st != ST_END_WHERE) | |
4ee9c684 | 5466 | return MATCH_YES; |
5467 | ||
5468 | if (gfc_current_block () == NULL) | |
5469 | return MATCH_YES; | |
5470 | ||
5471 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
5472 | block_name, gfc_ascii_statement (*st)); | |
5473 | ||
5474 | return MATCH_ERROR; | |
5475 | } | |
5476 | ||
5477 | /* END INTERFACE has a special handler for its several possible endings. */ | |
5478 | if (*st == ST_END_INTERFACE) | |
5479 | return gfc_match_end_interface (); | |
5480 | ||
f6d0e37a | 5481 | /* We haven't hit the end of statement, so what is left must be an |
5482 | end-name. */ | |
4ee9c684 | 5483 | m = gfc_match_space (); |
5484 | if (m == MATCH_YES) | |
5485 | m = gfc_match_name (name); | |
5486 | ||
5487 | if (m == MATCH_NO) | |
5488 | gfc_error ("Expected terminating name at %C"); | |
5489 | if (m != MATCH_YES) | |
5490 | goto cleanup; | |
5491 | ||
5492 | if (block_name == NULL) | |
5493 | goto syntax; | |
5494 | ||
1e057e9b | 5495 | if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0) |
4ee9c684 | 5496 | { |
5497 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
5498 | gfc_ascii_statement (*st)); | |
5499 | goto cleanup; | |
5500 | } | |
1e057e9b | 5501 | /* Procedure pointer as function result. */ |
5502 | else if (strcmp (block_name, "ppr@") == 0 | |
5503 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0) | |
5504 | { | |
5505 | gfc_error ("Expected label '%s' for %s statement at %C", | |
5506 | gfc_current_block ()->ns->proc_name->name, | |
5507 | gfc_ascii_statement (*st)); | |
5508 | goto cleanup; | |
5509 | } | |
4ee9c684 | 5510 | |
5511 | if (gfc_match_eos () == MATCH_YES) | |
5512 | return MATCH_YES; | |
5513 | ||
5514 | syntax: | |
5515 | gfc_syntax_error (*st); | |
5516 | ||
5517 | cleanup: | |
cbb9e6aa | 5518 | gfc_current_locus = old_loc; |
4ee9c684 | 5519 | return MATCH_ERROR; |
5520 | } | |
5521 | ||
5522 | ||
5523 | ||
5524 | /***************** Attribute declaration statements ****************/ | |
5525 | ||
5526 | /* Set the attribute of a single variable. */ | |
5527 | ||
5528 | static match | |
5529 | attr_decl1 (void) | |
5530 | { | |
5531 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5532 | gfc_array_spec *as; | |
5533 | gfc_symbol *sym; | |
5534 | locus var_locus; | |
5535 | match m; | |
5536 | ||
5537 | as = NULL; | |
5538 | ||
5539 | m = gfc_match_name (name); | |
5540 | if (m != MATCH_YES) | |
5541 | goto cleanup; | |
5542 | ||
36b0a1b0 | 5543 | if (find_special (name, &sym, false)) |
4ee9c684 | 5544 | return MATCH_ERROR; |
5545 | ||
cbb9e6aa | 5546 | var_locus = gfc_current_locus; |
4ee9c684 | 5547 | |
5548 | /* Deal with possible array specification for certain attributes. */ | |
5549 | if (current_attr.dimension | |
5550 | || current_attr.allocatable | |
5551 | || current_attr.pointer | |
5552 | || current_attr.target) | |
5553 | { | |
5554 | m = gfc_match_array_spec (&as); | |
5555 | if (m == MATCH_ERROR) | |
5556 | goto cleanup; | |
5557 | ||
5558 | if (current_attr.dimension && m == MATCH_NO) | |
5559 | { | |
1a9745d2 | 5560 | gfc_error ("Missing array specification at %L in DIMENSION " |
5561 | "statement", &var_locus); | |
4ee9c684 | 5562 | m = MATCH_ERROR; |
5563 | goto cleanup; | |
5564 | } | |
5565 | ||
13aebeb0 | 5566 | if (current_attr.dimension && sym->value) |
5567 | { | |
5568 | gfc_error ("Dimensions specified for %s at %L after its " | |
5569 | "initialisation", sym->name, &var_locus); | |
5570 | m = MATCH_ERROR; | |
5571 | goto cleanup; | |
5572 | } | |
5573 | ||
4ee9c684 | 5574 | if ((current_attr.allocatable || current_attr.pointer) |
5575 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
5576 | { | |
1a9745d2 | 5577 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
4ee9c684 | 5578 | m = MATCH_ERROR; |
5579 | goto cleanup; | |
5580 | } | |
5581 | } | |
5582 | ||
1a9745d2 | 5583 | /* Update symbol table. DIMENSION attribute is set |
5584 | in gfc_set_array_spec(). */ | |
4ee9c684 | 5585 | if (current_attr.dimension == 0 |
63986dfb | 5586 | && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE) |
4ee9c684 | 5587 | { |
5588 | m = MATCH_ERROR; | |
5589 | goto cleanup; | |
5590 | } | |
5591 | ||
5592 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
5593 | { | |
5594 | m = MATCH_ERROR; | |
5595 | goto cleanup; | |
5596 | } | |
e14bee04 | 5597 | |
b549d2a5 | 5598 | if (sym->attr.cray_pointee && sym->as != NULL) |
5599 | { | |
5600 | /* Fix the array spec. */ | |
5601 | m = gfc_mod_pointee_as (sym->as); | |
5602 | if (m == MATCH_ERROR) | |
5603 | goto cleanup; | |
5604 | } | |
4ee9c684 | 5605 | |
25dd7350 | 5606 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
14efb9b7 | 5607 | { |
5608 | m = MATCH_ERROR; | |
5609 | goto cleanup; | |
5610 | } | |
5611 | ||
4ee9c684 | 5612 | if ((current_attr.external || current_attr.intrinsic) |
5613 | && sym->attr.flavor != FL_PROCEDURE | |
950683ed | 5614 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
4ee9c684 | 5615 | { |
5616 | m = MATCH_ERROR; | |
5617 | goto cleanup; | |
5618 | } | |
5619 | ||
1e057e9b | 5620 | add_hidden_procptr_result (sym); |
5621 | ||
4ee9c684 | 5622 | return MATCH_YES; |
5623 | ||
5624 | cleanup: | |
5625 | gfc_free_array_spec (as); | |
5626 | return m; | |
5627 | } | |
5628 | ||
5629 | ||
5630 | /* Generic attribute declaration subroutine. Used for attributes that | |
5631 | just have a list of names. */ | |
5632 | ||
5633 | static match | |
5634 | attr_decl (void) | |
5635 | { | |
5636 | match m; | |
5637 | ||
5638 | /* Gobble the optional double colon, by simply ignoring the result | |
5639 | of gfc_match(). */ | |
5640 | gfc_match (" ::"); | |
5641 | ||
5642 | for (;;) | |
5643 | { | |
5644 | m = attr_decl1 (); | |
5645 | if (m != MATCH_YES) | |
5646 | break; | |
5647 | ||
5648 | if (gfc_match_eos () == MATCH_YES) | |
5649 | { | |
5650 | m = MATCH_YES; | |
5651 | break; | |
5652 | } | |
5653 | ||
5654 | if (gfc_match_char (',') != MATCH_YES) | |
5655 | { | |
5656 | gfc_error ("Unexpected character in variable list at %C"); | |
5657 | m = MATCH_ERROR; | |
5658 | break; | |
5659 | } | |
5660 | } | |
5661 | ||
5662 | return m; | |
5663 | } | |
5664 | ||
5665 | ||
b549d2a5 | 5666 | /* This routine matches Cray Pointer declarations of the form: |
5667 | pointer ( <pointer>, <pointee> ) | |
5668 | or | |
e14bee04 | 5669 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
5670 | The pointer, if already declared, should be an integer. Otherwise, we | |
b549d2a5 | 5671 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
5672 | be either a scalar, or an array declaration. No space is allocated for | |
e14bee04 | 5673 | the pointee. For the statement |
b549d2a5 | 5674 | pointer (ipt, ar(10)) |
5675 | any subsequent uses of ar will be translated (in C-notation) as | |
e14bee04 | 5676 | ar(i) => ((<type> *) ipt)(i) |
b7bf3f81 | 5677 | After gimplification, pointee variable will disappear in the code. */ |
b549d2a5 | 5678 | |
5679 | static match | |
5680 | cray_pointer_decl (void) | |
5681 | { | |
5682 | match m; | |
5683 | gfc_array_spec *as; | |
5684 | gfc_symbol *cptr; /* Pointer symbol. */ | |
5685 | gfc_symbol *cpte; /* Pointee symbol. */ | |
5686 | locus var_locus; | |
5687 | bool done = false; | |
5688 | ||
5689 | while (!done) | |
5690 | { | |
5691 | if (gfc_match_char ('(') != MATCH_YES) | |
5692 | { | |
5693 | gfc_error ("Expected '(' at %C"); | |
e14bee04 | 5694 | return MATCH_ERROR; |
b549d2a5 | 5695 | } |
e14bee04 | 5696 | |
b549d2a5 | 5697 | /* Match pointer. */ |
5698 | var_locus = gfc_current_locus; | |
5699 | gfc_clear_attr (¤t_attr); | |
5700 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
5701 | current_ts.type = BT_INTEGER; | |
5702 | current_ts.kind = gfc_index_integer_kind; | |
5703 | ||
e14bee04 | 5704 | m = gfc_match_symbol (&cptr, 0); |
b549d2a5 | 5705 | if (m != MATCH_YES) |
5706 | { | |
5707 | gfc_error ("Expected variable name at %C"); | |
5708 | return m; | |
5709 | } | |
e14bee04 | 5710 | |
b549d2a5 | 5711 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) |
5712 | return MATCH_ERROR; | |
5713 | ||
e14bee04 | 5714 | gfc_set_sym_referenced (cptr); |
b549d2a5 | 5715 | |
5716 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
5717 | { | |
5718 | cptr->ts.type = BT_INTEGER; | |
e14bee04 | 5719 | cptr->ts.kind = gfc_index_integer_kind; |
b549d2a5 | 5720 | } |
5721 | else if (cptr->ts.type != BT_INTEGER) | |
5722 | { | |
7698a624 | 5723 | gfc_error ("Cray pointer at %C must be an integer"); |
b549d2a5 | 5724 | return MATCH_ERROR; |
5725 | } | |
5726 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
5727 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
7698a624 | 5728 | " memory addresses require %d bytes", |
1a9745d2 | 5729 | cptr->ts.kind, gfc_index_integer_kind); |
b549d2a5 | 5730 | |
5731 | if (gfc_match_char (',') != MATCH_YES) | |
5732 | { | |
5733 | gfc_error ("Expected \",\" at %C"); | |
e14bee04 | 5734 | return MATCH_ERROR; |
b549d2a5 | 5735 | } |
5736 | ||
e14bee04 | 5737 | /* Match Pointee. */ |
b549d2a5 | 5738 | var_locus = gfc_current_locus; |
5739 | gfc_clear_attr (¤t_attr); | |
5740 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
5741 | current_ts.type = BT_UNKNOWN; | |
5742 | current_ts.kind = 0; | |
5743 | ||
5744 | m = gfc_match_symbol (&cpte, 0); | |
5745 | if (m != MATCH_YES) | |
5746 | { | |
5747 | gfc_error ("Expected variable name at %C"); | |
5748 | return m; | |
5749 | } | |
e14bee04 | 5750 | |
b549d2a5 | 5751 | /* Check for an optional array spec. */ |
5752 | m = gfc_match_array_spec (&as); | |
5753 | if (m == MATCH_ERROR) | |
5754 | { | |
5755 | gfc_free_array_spec (as); | |
5756 | return m; | |
5757 | } | |
5758 | else if (m == MATCH_NO) | |
5759 | { | |
5760 | gfc_free_array_spec (as); | |
5761 | as = NULL; | |
5762 | } | |
5763 | ||
5764 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
5765 | return MATCH_ERROR; | |
5766 | ||
5767 | gfc_set_sym_referenced (cpte); | |
5768 | ||
5769 | if (cpte->as == NULL) | |
5770 | { | |
5771 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
5772 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
5773 | } | |
5774 | else if (as != NULL) | |
5775 | { | |
7698a624 | 5776 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 5777 | gfc_free_array_spec (as); |
5778 | return MATCH_ERROR; | |
5779 | } | |
5780 | ||
5781 | as = NULL; | |
5782 | ||
5783 | if (cpte->as != NULL) | |
5784 | { | |
5785 | /* Fix array spec. */ | |
5786 | m = gfc_mod_pointee_as (cpte->as); | |
5787 | if (m == MATCH_ERROR) | |
5788 | return m; | |
5789 | } | |
5790 | ||
5791 | /* Point the Pointee at the Pointer. */ | |
b7bf3f81 | 5792 | cpte->cp_pointer = cptr; |
b549d2a5 | 5793 | |
5794 | if (gfc_match_char (')') != MATCH_YES) | |
5795 | { | |
5796 | gfc_error ("Expected \")\" at %C"); | |
5797 | return MATCH_ERROR; | |
5798 | } | |
5799 | m = gfc_match_char (','); | |
5800 | if (m != MATCH_YES) | |
5801 | done = true; /* Stop searching for more declarations. */ | |
5802 | ||
5803 | } | |
5804 | ||
5805 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
5806 | || gfc_match_eos () != MATCH_YES) | |
5807 | { | |
5808 | gfc_error ("Expected \",\" or end of statement at %C"); | |
5809 | return MATCH_ERROR; | |
5810 | } | |
5811 | return MATCH_YES; | |
5812 | } | |
5813 | ||
5814 | ||
4ee9c684 | 5815 | match |
5816 | gfc_match_external (void) | |
5817 | { | |
5818 | ||
5819 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5820 | current_attr.external = 1; |
4ee9c684 | 5821 | |
5822 | return attr_decl (); | |
5823 | } | |
5824 | ||
5825 | ||
4ee9c684 | 5826 | match |
5827 | gfc_match_intent (void) | |
5828 | { | |
5829 | sym_intent intent; | |
5830 | ||
5831 | intent = match_intent_spec (); | |
5832 | if (intent == INTENT_UNKNOWN) | |
5833 | return MATCH_ERROR; | |
5834 | ||
5835 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5836 | current_attr.intent = intent; |
4ee9c684 | 5837 | |
5838 | return attr_decl (); | |
5839 | } | |
5840 | ||
5841 | ||
5842 | match | |
5843 | gfc_match_intrinsic (void) | |
5844 | { | |
5845 | ||
5846 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5847 | current_attr.intrinsic = 1; |
4ee9c684 | 5848 | |
5849 | return attr_decl (); | |
5850 | } | |
5851 | ||
5852 | ||
5853 | match | |
5854 | gfc_match_optional (void) | |
5855 | { | |
5856 | ||
5857 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5858 | current_attr.optional = 1; |
4ee9c684 | 5859 | |
5860 | return attr_decl (); | |
5861 | } | |
5862 | ||
5863 | ||
5864 | match | |
5865 | gfc_match_pointer (void) | |
5866 | { | |
b549d2a5 | 5867 | gfc_gobble_whitespace (); |
e0be6f02 | 5868 | if (gfc_peek_ascii_char () == '(') |
b549d2a5 | 5869 | { |
5870 | if (!gfc_option.flag_cray_pointer) | |
5871 | { | |
1a9745d2 | 5872 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
5873 | "flag"); | |
b549d2a5 | 5874 | return MATCH_ERROR; |
5875 | } | |
5876 | return cray_pointer_decl (); | |
5877 | } | |
5878 | else | |
5879 | { | |
5880 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5881 | current_attr.pointer = 1; |
b549d2a5 | 5882 | |
5883 | return attr_decl (); | |
5884 | } | |
4ee9c684 | 5885 | } |
5886 | ||
5887 | ||
5888 | match | |
5889 | gfc_match_allocatable (void) | |
5890 | { | |
4ee9c684 | 5891 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5892 | current_attr.allocatable = 1; |
4ee9c684 | 5893 | |
5894 | return attr_decl (); | |
5895 | } | |
5896 | ||
5897 | ||
5898 | match | |
5899 | gfc_match_dimension (void) | |
5900 | { | |
4ee9c684 | 5901 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5902 | current_attr.dimension = 1; |
4ee9c684 | 5903 | |
5904 | return attr_decl (); | |
5905 | } | |
5906 | ||
5907 | ||
5908 | match | |
5909 | gfc_match_target (void) | |
5910 | { | |
4ee9c684 | 5911 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 5912 | current_attr.target = 1; |
4ee9c684 | 5913 | |
5914 | return attr_decl (); | |
5915 | } | |
5916 | ||
5917 | ||
5918 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
5919 | statement. */ | |
5920 | ||
5921 | static match | |
5922 | access_attr_decl (gfc_statement st) | |
5923 | { | |
5924 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5925 | interface_type type; | |
5926 | gfc_user_op *uop; | |
5927 | gfc_symbol *sym; | |
dcb1b019 | 5928 | gfc_intrinsic_op op; |
4ee9c684 | 5929 | match m; |
5930 | ||
5931 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5932 | goto done; | |
5933 | ||
5934 | for (;;) | |
5935 | { | |
dcb1b019 | 5936 | m = gfc_match_generic_spec (&type, name, &op); |
4ee9c684 | 5937 | if (m == MATCH_NO) |
5938 | goto syntax; | |
5939 | if (m == MATCH_ERROR) | |
5940 | return MATCH_ERROR; | |
5941 | ||
5942 | switch (type) | |
5943 | { | |
5944 | case INTERFACE_NAMELESS: | |
94fa7146 | 5945 | case INTERFACE_ABSTRACT: |
4ee9c684 | 5946 | goto syntax; |
5947 | ||
5948 | case INTERFACE_GENERIC: | |
5949 | if (gfc_get_symbol (name, NULL, &sym)) | |
5950 | goto done; | |
5951 | ||
1a9745d2 | 5952 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
5953 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
950683ed | 5954 | sym->name, NULL) == FAILURE) |
4ee9c684 | 5955 | return MATCH_ERROR; |
5956 | ||
5957 | break; | |
5958 | ||
5959 | case INTERFACE_INTRINSIC_OP: | |
dcb1b019 | 5960 | if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN) |
4ee9c684 | 5961 | { |
dcb1b019 | 5962 | gfc_current_ns->operator_access[op] = |
4ee9c684 | 5963 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; |
5964 | } | |
5965 | else | |
5966 | { | |
5967 | gfc_error ("Access specification of the %s operator at %C has " | |
dcb1b019 | 5968 | "already been specified", gfc_op2string (op)); |
4ee9c684 | 5969 | goto done; |
5970 | } | |
5971 | ||
5972 | break; | |
5973 | ||
5974 | case INTERFACE_USER_OP: | |
5975 | uop = gfc_get_uop (name); | |
5976 | ||
5977 | if (uop->access == ACCESS_UNKNOWN) | |
5978 | { | |
1a9745d2 | 5979 | uop->access = (st == ST_PUBLIC) |
5980 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
4ee9c684 | 5981 | } |
5982 | else | |
5983 | { | |
1a9745d2 | 5984 | gfc_error ("Access specification of the .%s. operator at %C " |
5985 | "has already been specified", sym->name); | |
4ee9c684 | 5986 | goto done; |
5987 | } | |
5988 | ||
5989 | break; | |
5990 | } | |
5991 | ||
5992 | if (gfc_match_char (',') == MATCH_NO) | |
5993 | break; | |
5994 | } | |
5995 | ||
5996 | if (gfc_match_eos () != MATCH_YES) | |
5997 | goto syntax; | |
5998 | return MATCH_YES; | |
5999 | ||
6000 | syntax: | |
6001 | gfc_syntax_error (st); | |
6002 | ||
6003 | done: | |
6004 | return MATCH_ERROR; | |
6005 | } | |
6006 | ||
6007 | ||
3ea52af3 | 6008 | match |
6009 | gfc_match_protected (void) | |
6010 | { | |
6011 | gfc_symbol *sym; | |
6012 | match m; | |
6013 | ||
6014 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
6015 | { | |
6016 | gfc_error ("PROTECTED at %C only allowed in specification " | |
6017 | "part of a module"); | |
6018 | return MATCH_ERROR; | |
6019 | ||
6020 | } | |
6021 | ||
1a9745d2 | 6022 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
3ea52af3 | 6023 | == FAILURE) |
6024 | return MATCH_ERROR; | |
6025 | ||
6026 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6027 | { | |
6028 | return MATCH_ERROR; | |
6029 | } | |
6030 | ||
6031 | if (gfc_match_eos () == MATCH_YES) | |
6032 | goto syntax; | |
6033 | ||
6034 | for(;;) | |
6035 | { | |
6036 | m = gfc_match_symbol (&sym, 0); | |
6037 | switch (m) | |
6038 | { | |
6039 | case MATCH_YES: | |
1a9745d2 | 6040 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
6041 | == FAILURE) | |
3ea52af3 | 6042 | return MATCH_ERROR; |
6043 | goto next_item; | |
6044 | ||
6045 | case MATCH_NO: | |
6046 | break; | |
6047 | ||
6048 | case MATCH_ERROR: | |
6049 | return MATCH_ERROR; | |
6050 | } | |
6051 | ||
6052 | next_item: | |
6053 | if (gfc_match_eos () == MATCH_YES) | |
6054 | break; | |
6055 | if (gfc_match_char (',') != MATCH_YES) | |
6056 | goto syntax; | |
6057 | } | |
6058 | ||
6059 | return MATCH_YES; | |
6060 | ||
6061 | syntax: | |
6062 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
6063 | return MATCH_ERROR; | |
6064 | } | |
6065 | ||
6066 | ||
a0527218 | 6067 | /* The PRIVATE statement is a bit weird in that it can be an attribute |
69b1505f | 6068 | declaration, but also works as a standalone statement inside of a |
4ee9c684 | 6069 | type declaration or a module. */ |
6070 | ||
6071 | match | |
1a9745d2 | 6072 | gfc_match_private (gfc_statement *st) |
4ee9c684 | 6073 | { |
6074 | ||
6075 | if (gfc_match ("private") != MATCH_YES) | |
6076 | return MATCH_NO; | |
6077 | ||
e14bee04 | 6078 | if (gfc_current_state () != COMP_MODULE |
7fd88f6e | 6079 | && !(gfc_current_state () == COMP_DERIVED |
6080 | && gfc_state_stack->previous | |
6081 | && gfc_state_stack->previous->state == COMP_MODULE) | |
6082 | && !(gfc_current_state () == COMP_DERIVED_CONTAINS | |
6083 | && gfc_state_stack->previous && gfc_state_stack->previous->previous | |
6084 | && gfc_state_stack->previous->previous->state == COMP_MODULE)) | |
e14bee04 | 6085 | { |
6086 | gfc_error ("PRIVATE statement at %C is only allowed in the " | |
6087 | "specification part of a module"); | |
6088 | return MATCH_ERROR; | |
6089 | } | |
6090 | ||
4ee9c684 | 6091 | if (gfc_current_state () == COMP_DERIVED) |
6092 | { | |
6093 | if (gfc_match_eos () == MATCH_YES) | |
6094 | { | |
6095 | *st = ST_PRIVATE; | |
6096 | return MATCH_YES; | |
6097 | } | |
6098 | ||
6099 | gfc_syntax_error (ST_PRIVATE); | |
6100 | return MATCH_ERROR; | |
6101 | } | |
6102 | ||
6103 | if (gfc_match_eos () == MATCH_YES) | |
6104 | { | |
6105 | *st = ST_PRIVATE; | |
6106 | return MATCH_YES; | |
6107 | } | |
6108 | ||
6109 | *st = ST_ATTR_DECL; | |
6110 | return access_attr_decl (ST_PRIVATE); | |
6111 | } | |
6112 | ||
6113 | ||
6114 | match | |
1a9745d2 | 6115 | gfc_match_public (gfc_statement *st) |
4ee9c684 | 6116 | { |
6117 | ||
6118 | if (gfc_match ("public") != MATCH_YES) | |
6119 | return MATCH_NO; | |
6120 | ||
e14bee04 | 6121 | if (gfc_current_state () != COMP_MODULE) |
6122 | { | |
6123 | gfc_error ("PUBLIC statement at %C is only allowed in the " | |
6124 | "specification part of a module"); | |
6125 | return MATCH_ERROR; | |
6126 | } | |
6127 | ||
4ee9c684 | 6128 | if (gfc_match_eos () == MATCH_YES) |
6129 | { | |
6130 | *st = ST_PUBLIC; | |
6131 | return MATCH_YES; | |
6132 | } | |
6133 | ||
6134 | *st = ST_ATTR_DECL; | |
6135 | return access_attr_decl (ST_PUBLIC); | |
6136 | } | |
6137 | ||
6138 | ||
6139 | /* Workhorse for gfc_match_parameter. */ | |
6140 | ||
6141 | static match | |
6142 | do_parm (void) | |
6143 | { | |
6144 | gfc_symbol *sym; | |
6145 | gfc_expr *init; | |
6146 | match m; | |
6147 | ||
6148 | m = gfc_match_symbol (&sym, 0); | |
6149 | if (m == MATCH_NO) | |
6150 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
6151 | ||
6152 | if (m != MATCH_YES) | |
6153 | return m; | |
6154 | ||
6155 | if (gfc_match_char ('=') == MATCH_NO) | |
6156 | { | |
6157 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
6158 | return MATCH_ERROR; | |
6159 | } | |
6160 | ||
6161 | m = gfc_match_init_expr (&init); | |
6162 | if (m == MATCH_NO) | |
6163 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
6164 | if (m != MATCH_YES) | |
6165 | return m; | |
6166 | ||
6167 | if (sym->ts.type == BT_UNKNOWN | |
6168 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
6169 | { | |
6170 | m = MATCH_ERROR; | |
6171 | goto cleanup; | |
6172 | } | |
6173 | ||
6174 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
950683ed | 6175 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
4ee9c684 | 6176 | { |
6177 | m = MATCH_ERROR; | |
6178 | goto cleanup; | |
6179 | } | |
6180 | ||
13aebeb0 | 6181 | if (sym->value) |
6182 | { | |
6183 | gfc_error ("Initializing already initialized variable at %C"); | |
6184 | m = MATCH_ERROR; | |
6185 | goto cleanup; | |
6186 | } | |
6187 | ||
c1b6da4a | 6188 | if (sym->ts.type == BT_CHARACTER |
6189 | && sym->ts.cl != NULL | |
6190 | && sym->ts.cl->length != NULL | |
6191 | && sym->ts.cl->length->expr_type == EXPR_CONSTANT | |
6192 | && init->expr_type == EXPR_CONSTANT | |
f97d54ed | 6193 | && init->ts.type == BT_CHARACTER) |
c1b6da4a | 6194 | gfc_set_constant_character_len ( |
d1a39099 | 6195 | mpz_get_si (sym->ts.cl->length->value.integer), init, -1); |
f97d54ed | 6196 | else if (sym->ts.type == BT_CHARACTER && sym->ts.cl != NULL |
6197 | && sym->ts.cl->length == NULL) | |
6198 | { | |
6199 | int clen; | |
6200 | if (init->expr_type == EXPR_CONSTANT) | |
6201 | { | |
6202 | clen = init->value.character.length; | |
6203 | sym->ts.cl->length = gfc_int_expr (clen); | |
6204 | } | |
6205 | else if (init->expr_type == EXPR_ARRAY) | |
6206 | { | |
6207 | gfc_expr *p = init->value.constructor->expr; | |
6208 | clen = p->value.character.length; | |
6209 | sym->ts.cl->length = gfc_int_expr (clen); | |
6210 | } | |
6211 | else if (init->ts.cl && init->ts.cl->length) | |
6212 | sym->ts.cl->length = gfc_copy_expr (sym->value->ts.cl->length); | |
6213 | } | |
c1b6da4a | 6214 | |
4ee9c684 | 6215 | sym->value = init; |
6216 | return MATCH_YES; | |
6217 | ||
6218 | cleanup: | |
6219 | gfc_free_expr (init); | |
6220 | return m; | |
6221 | } | |
6222 | ||
6223 | ||
6224 | /* Match a parameter statement, with the weird syntax that these have. */ | |
6225 | ||
6226 | match | |
6227 | gfc_match_parameter (void) | |
6228 | { | |
6229 | match m; | |
6230 | ||
6231 | if (gfc_match_char ('(') == MATCH_NO) | |
6232 | return MATCH_NO; | |
6233 | ||
6234 | for (;;) | |
6235 | { | |
6236 | m = do_parm (); | |
6237 | if (m != MATCH_YES) | |
6238 | break; | |
6239 | ||
6240 | if (gfc_match (" )%t") == MATCH_YES) | |
6241 | break; | |
6242 | ||
6243 | if (gfc_match_char (',') != MATCH_YES) | |
6244 | { | |
6245 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
6246 | m = MATCH_ERROR; | |
6247 | break; | |
6248 | } | |
6249 | } | |
6250 | ||
6251 | return m; | |
6252 | } | |
6253 | ||
6254 | ||
6255 | /* Save statements have a special syntax. */ | |
6256 | ||
6257 | match | |
6258 | gfc_match_save (void) | |
6259 | { | |
82f5ee13 | 6260 | char n[GFC_MAX_SYMBOL_LEN+1]; |
6261 | gfc_common_head *c; | |
4ee9c684 | 6262 | gfc_symbol *sym; |
6263 | match m; | |
6264 | ||
6265 | if (gfc_match_eos () == MATCH_YES) | |
6266 | { | |
6267 | if (gfc_current_ns->seen_save) | |
6268 | { | |
1a9745d2 | 6269 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
6270 | "follows previous SAVE statement") | |
76e82f95 | 6271 | == FAILURE) |
6272 | return MATCH_ERROR; | |
4ee9c684 | 6273 | } |
6274 | ||
6275 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
6276 | return MATCH_YES; | |
6277 | } | |
6278 | ||
6279 | if (gfc_current_ns->save_all) | |
6280 | { | |
1a9745d2 | 6281 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
6282 | "blanket SAVE statement") | |
76e82f95 | 6283 | == FAILURE) |
6284 | return MATCH_ERROR; | |
4ee9c684 | 6285 | } |
6286 | ||
6287 | gfc_match (" ::"); | |
6288 | ||
6289 | for (;;) | |
6290 | { | |
6291 | m = gfc_match_symbol (&sym, 0); | |
6292 | switch (m) | |
6293 | { | |
6294 | case MATCH_YES: | |
1a9745d2 | 6295 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
6296 | == FAILURE) | |
4ee9c684 | 6297 | return MATCH_ERROR; |
6298 | goto next_item; | |
6299 | ||
6300 | case MATCH_NO: | |
6301 | break; | |
6302 | ||
6303 | case MATCH_ERROR: | |
6304 | return MATCH_ERROR; | |
6305 | } | |
6306 | ||
82f5ee13 | 6307 | m = gfc_match (" / %n /", &n); |
4ee9c684 | 6308 | if (m == MATCH_ERROR) |
6309 | return MATCH_ERROR; | |
6310 | if (m == MATCH_NO) | |
6311 | goto syntax; | |
6312 | ||
403ddc45 | 6313 | c = gfc_get_common (n, 0); |
82f5ee13 | 6314 | c->saved = 1; |
6315 | ||
4ee9c684 | 6316 | gfc_current_ns->seen_save = 1; |
6317 | ||
6318 | next_item: | |
6319 | if (gfc_match_eos () == MATCH_YES) | |
6320 | break; | |
6321 | if (gfc_match_char (',') != MATCH_YES) | |
6322 | goto syntax; | |
6323 | } | |
6324 | ||
6325 | return MATCH_YES; | |
6326 | ||
6327 | syntax: | |
6328 | gfc_error ("Syntax error in SAVE statement at %C"); | |
6329 | return MATCH_ERROR; | |
6330 | } | |
6331 | ||
6332 | ||
8f6339b6 | 6333 | match |
6334 | gfc_match_value (void) | |
6335 | { | |
6336 | gfc_symbol *sym; | |
6337 | match m; | |
6338 | ||
1a9745d2 | 6339 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
8f6339b6 | 6340 | == FAILURE) |
6341 | return MATCH_ERROR; | |
6342 | ||
6343 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6344 | { | |
6345 | return MATCH_ERROR; | |
6346 | } | |
6347 | ||
6348 | if (gfc_match_eos () == MATCH_YES) | |
6349 | goto syntax; | |
6350 | ||
6351 | for(;;) | |
6352 | { | |
6353 | m = gfc_match_symbol (&sym, 0); | |
6354 | switch (m) | |
6355 | { | |
6356 | case MATCH_YES: | |
1a9745d2 | 6357 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
6358 | == FAILURE) | |
8f6339b6 | 6359 | return MATCH_ERROR; |
6360 | goto next_item; | |
6361 | ||
6362 | case MATCH_NO: | |
6363 | break; | |
6364 | ||
6365 | case MATCH_ERROR: | |
6366 | return MATCH_ERROR; | |
6367 | } | |
6368 | ||
6369 | next_item: | |
6370 | if (gfc_match_eos () == MATCH_YES) | |
6371 | break; | |
6372 | if (gfc_match_char (',') != MATCH_YES) | |
6373 | goto syntax; | |
6374 | } | |
6375 | ||
6376 | return MATCH_YES; | |
6377 | ||
6378 | syntax: | |
6379 | gfc_error ("Syntax error in VALUE statement at %C"); | |
6380 | return MATCH_ERROR; | |
6381 | } | |
6382 | ||
f6d0e37a | 6383 | |
ef814c81 | 6384 | match |
6385 | gfc_match_volatile (void) | |
6386 | { | |
6387 | gfc_symbol *sym; | |
6388 | match m; | |
6389 | ||
1a9745d2 | 6390 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
ef814c81 | 6391 | == FAILURE) |
6392 | return MATCH_ERROR; | |
6393 | ||
6394 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6395 | { | |
6396 | return MATCH_ERROR; | |
6397 | } | |
6398 | ||
6399 | if (gfc_match_eos () == MATCH_YES) | |
6400 | goto syntax; | |
6401 | ||
6402 | for(;;) | |
6403 | { | |
2f241857 | 6404 | /* VOLATILE is special because it can be added to host-associated |
6405 | symbols locally. */ | |
6406 | m = gfc_match_symbol (&sym, 1); | |
ef814c81 | 6407 | switch (m) |
6408 | { | |
6409 | case MATCH_YES: | |
1a9745d2 | 6410 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
6411 | == FAILURE) | |
ef814c81 | 6412 | return MATCH_ERROR; |
6413 | goto next_item; | |
6414 | ||
6415 | case MATCH_NO: | |
6416 | break; | |
6417 | ||
6418 | case MATCH_ERROR: | |
6419 | return MATCH_ERROR; | |
6420 | } | |
6421 | ||
6422 | next_item: | |
6423 | if (gfc_match_eos () == MATCH_YES) | |
6424 | break; | |
6425 | if (gfc_match_char (',') != MATCH_YES) | |
6426 | goto syntax; | |
6427 | } | |
6428 | ||
6429 | return MATCH_YES; | |
6430 | ||
6431 | syntax: | |
6432 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
6433 | return MATCH_ERROR; | |
6434 | } | |
6435 | ||
6436 | ||
4ee9c684 | 6437 | /* Match a module procedure statement. Note that we have to modify |
6438 | symbols in the parent's namespace because the current one was there | |
89d91d02 | 6439 | to receive symbols that are in an interface's formal argument list. */ |
4ee9c684 | 6440 | |
6441 | match | |
6442 | gfc_match_modproc (void) | |
6443 | { | |
6444 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6445 | gfc_symbol *sym; | |
6446 | match m; | |
63d42079 | 6447 | gfc_namespace *module_ns; |
94ce9f74 | 6448 | gfc_interface *old_interface_head, *interface; |
4ee9c684 | 6449 | |
6450 | if (gfc_state_stack->state != COMP_INTERFACE | |
6451 | || gfc_state_stack->previous == NULL | |
5cf92482 | 6452 | || current_interface.type == INTERFACE_NAMELESS |
6453 | || current_interface.type == INTERFACE_ABSTRACT) | |
4ee9c684 | 6454 | { |
1a9745d2 | 6455 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
6456 | "interface"); | |
4ee9c684 | 6457 | return MATCH_ERROR; |
6458 | } | |
6459 | ||
63d42079 | 6460 | module_ns = gfc_current_ns->parent; |
6461 | for (; module_ns; module_ns = module_ns->parent) | |
6462 | if (module_ns->proc_name->attr.flavor == FL_MODULE) | |
6463 | break; | |
6464 | ||
6465 | if (module_ns == NULL) | |
6466 | return MATCH_ERROR; | |
6467 | ||
94ce9f74 | 6468 | /* Store the current state of the interface. We will need it if we |
6469 | end up with a syntax error and need to recover. */ | |
6470 | old_interface_head = gfc_current_interface_head (); | |
6471 | ||
4ee9c684 | 6472 | for (;;) |
6473 | { | |
94ce9f74 | 6474 | bool last = false; |
6475 | ||
4ee9c684 | 6476 | m = gfc_match_name (name); |
6477 | if (m == MATCH_NO) | |
6478 | goto syntax; | |
6479 | if (m != MATCH_YES) | |
6480 | return MATCH_ERROR; | |
6481 | ||
94ce9f74 | 6482 | /* Check for syntax error before starting to add symbols to the |
6483 | current namespace. */ | |
6484 | if (gfc_match_eos () == MATCH_YES) | |
6485 | last = true; | |
6486 | if (!last && gfc_match_char (',') != MATCH_YES) | |
6487 | goto syntax; | |
6488 | ||
6489 | /* Now we're sure the syntax is valid, we process this item | |
6490 | further. */ | |
63d42079 | 6491 | if (gfc_get_symbol (name, module_ns, &sym)) |
4ee9c684 | 6492 | return MATCH_ERROR; |
6493 | ||
6494 | if (sym->attr.proc != PROC_MODULE | |
950683ed | 6495 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
6496 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 6497 | return MATCH_ERROR; |
6498 | ||
6499 | if (gfc_add_interface (sym) == FAILURE) | |
6500 | return MATCH_ERROR; | |
6501 | ||
3186f695 | 6502 | sym->attr.mod_proc = 1; |
6503 | ||
94ce9f74 | 6504 | if (last) |
4ee9c684 | 6505 | break; |
4ee9c684 | 6506 | } |
6507 | ||
6508 | return MATCH_YES; | |
6509 | ||
6510 | syntax: | |
94ce9f74 | 6511 | /* Restore the previous state of the interface. */ |
6512 | interface = gfc_current_interface_head (); | |
6513 | gfc_set_current_interface_head (old_interface_head); | |
6514 | ||
6515 | /* Free the new interfaces. */ | |
6516 | while (interface != old_interface_head) | |
6517 | { | |
6518 | gfc_interface *i = interface->next; | |
6519 | gfc_free (interface); | |
6520 | interface = i; | |
6521 | } | |
6522 | ||
6523 | /* And issue a syntax error. */ | |
4ee9c684 | 6524 | gfc_syntax_error (ST_MODULE_PROC); |
6525 | return MATCH_ERROR; | |
6526 | } | |
6527 | ||
6528 | ||
ea94d76d | 6529 | /* Check a derived type that is being extended. */ |
6530 | static gfc_symbol* | |
6531 | check_extended_derived_type (char *name) | |
6532 | { | |
6533 | gfc_symbol *extended; | |
6534 | ||
6535 | if (gfc_find_symbol (name, gfc_current_ns, 1, &extended)) | |
6536 | { | |
6537 | gfc_error ("Ambiguous symbol in TYPE definition at %C"); | |
6538 | return NULL; | |
6539 | } | |
6540 | ||
6541 | if (!extended) | |
6542 | { | |
6543 | gfc_error ("No such symbol in TYPE definition at %C"); | |
6544 | return NULL; | |
6545 | } | |
6546 | ||
6547 | if (extended->attr.flavor != FL_DERIVED) | |
6548 | { | |
6549 | gfc_error ("'%s' in EXTENDS expression at %C is not a " | |
6550 | "derived type", name); | |
6551 | return NULL; | |
6552 | } | |
6553 | ||
6554 | if (extended->attr.is_bind_c) | |
6555 | { | |
6556 | gfc_error ("'%s' cannot be extended at %C because it " | |
6557 | "is BIND(C)", extended->name); | |
6558 | return NULL; | |
6559 | } | |
6560 | ||
6561 | if (extended->attr.sequence) | |
6562 | { | |
6563 | gfc_error ("'%s' cannot be extended at %C because it " | |
6564 | "is a SEQUENCE type", extended->name); | |
6565 | return NULL; | |
6566 | } | |
6567 | ||
6568 | return extended; | |
6569 | } | |
6570 | ||
6571 | ||
c5d33754 | 6572 | /* Match the optional attribute specifiers for a type declaration. |
6573 | Return MATCH_ERROR if an error is encountered in one of the handled | |
6574 | attributes (public, private, bind(c)), MATCH_NO if what's found is | |
6575 | not a handled attribute, and MATCH_YES otherwise. TODO: More error | |
6576 | checking on attribute conflicts needs to be done. */ | |
4ee9c684 | 6577 | |
6578 | match | |
ea94d76d | 6579 | gfc_get_type_attr_spec (symbol_attribute *attr, char *name) |
4ee9c684 | 6580 | { |
c5d33754 | 6581 | /* See if the derived type is marked as private. */ |
4ee9c684 | 6582 | if (gfc_match (" , private") == MATCH_YES) |
6583 | { | |
e14bee04 | 6584 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 6585 | { |
e14bee04 | 6586 | gfc_error ("Derived type at %C can only be PRIVATE in the " |
6587 | "specification part of a module"); | |
4ee9c684 | 6588 | return MATCH_ERROR; |
6589 | } | |
6590 | ||
c5d33754 | 6591 | if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
4ee9c684 | 6592 | return MATCH_ERROR; |
4ee9c684 | 6593 | } |
c5d33754 | 6594 | else if (gfc_match (" , public") == MATCH_YES) |
4ee9c684 | 6595 | { |
e14bee04 | 6596 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 6597 | { |
e14bee04 | 6598 | gfc_error ("Derived type at %C can only be PUBLIC in the " |
6599 | "specification part of a module"); | |
4ee9c684 | 6600 | return MATCH_ERROR; |
6601 | } | |
6602 | ||
c5d33754 | 6603 | if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
4ee9c684 | 6604 | return MATCH_ERROR; |
4ee9c684 | 6605 | } |
ac5f2650 | 6606 | else if (gfc_match (" , bind ( c )") == MATCH_YES) |
c5d33754 | 6607 | { |
6608 | /* If the type is defined to be bind(c) it then needs to make | |
6609 | sure that all fields are interoperable. This will | |
6610 | need to be a semantic check on the finished derived type. | |
6611 | See 15.2.3 (lines 9-12) of F2003 draft. */ | |
6612 | if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) | |
6613 | return MATCH_ERROR; | |
6614 | ||
6615 | /* TODO: attr conflicts need to be checked, probably in symbol.c. */ | |
6616 | } | |
ac5f2650 | 6617 | else if (gfc_match (" , abstract") == MATCH_YES) |
6618 | { | |
6619 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C") | |
6620 | == FAILURE) | |
6621 | return MATCH_ERROR; | |
6622 | ||
6623 | if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE) | |
6624 | return MATCH_ERROR; | |
6625 | } | |
ea94d76d | 6626 | else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES) |
6627 | { | |
e485ad6b | 6628 | if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE) |
ea94d76d | 6629 | return MATCH_ERROR; |
6630 | } | |
c5d33754 | 6631 | else |
6632 | return MATCH_NO; | |
6633 | ||
6634 | /* If we get here, something matched. */ | |
6635 | return MATCH_YES; | |
6636 | } | |
6637 | ||
6638 | ||
6639 | /* Match the beginning of a derived type declaration. If a type name | |
6640 | was the result of a function, then it is possible to have a symbol | |
6641 | already to be known as a derived type yet have no components. */ | |
6642 | ||
6643 | match | |
6644 | gfc_match_derived_decl (void) | |
6645 | { | |
6646 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
ea94d76d | 6647 | char parent[GFC_MAX_SYMBOL_LEN + 1]; |
c5d33754 | 6648 | symbol_attribute attr; |
6649 | gfc_symbol *sym; | |
ea94d76d | 6650 | gfc_symbol *extended; |
c5d33754 | 6651 | match m; |
6652 | match is_type_attr_spec = MATCH_NO; | |
33e86520 | 6653 | bool seen_attr = false; |
c5d33754 | 6654 | |
6655 | if (gfc_current_state () == COMP_DERIVED) | |
6656 | return MATCH_NO; | |
6657 | ||
ea94d76d | 6658 | name[0] = '\0'; |
6659 | parent[0] = '\0'; | |
c5d33754 | 6660 | gfc_clear_attr (&attr); |
ea94d76d | 6661 | extended = NULL; |
c5d33754 | 6662 | |
6663 | do | |
6664 | { | |
ea94d76d | 6665 | is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent); |
c5d33754 | 6666 | if (is_type_attr_spec == MATCH_ERROR) |
6667 | return MATCH_ERROR; | |
33e86520 | 6668 | if (is_type_attr_spec == MATCH_YES) |
6669 | seen_attr = true; | |
c5d33754 | 6670 | } while (is_type_attr_spec == MATCH_YES); |
4ee9c684 | 6671 | |
e485ad6b | 6672 | /* Deal with derived type extensions. The extension attribute has |
6673 | been added to 'attr' but now the parent type must be found and | |
6674 | checked. */ | |
ea94d76d | 6675 | if (parent[0]) |
6676 | extended = check_extended_derived_type (parent); | |
6677 | ||
6678 | if (parent[0] && !extended) | |
6679 | return MATCH_ERROR; | |
6680 | ||
33e86520 | 6681 | if (gfc_match (" ::") != MATCH_YES && seen_attr) |
4ee9c684 | 6682 | { |
6683 | gfc_error ("Expected :: in TYPE definition at %C"); | |
6684 | return MATCH_ERROR; | |
6685 | } | |
6686 | ||
6687 | m = gfc_match (" %n%t", name); | |
6688 | if (m != MATCH_YES) | |
6689 | return m; | |
6690 | ||
a3055431 | 6691 | /* Make sure the name is not the name of an intrinsic type. */ |
6692 | if (gfc_is_intrinsic_typename (name)) | |
4ee9c684 | 6693 | { |
1a9745d2 | 6694 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
6695 | "type", name); | |
4ee9c684 | 6696 | return MATCH_ERROR; |
6697 | } | |
6698 | ||
6699 | if (gfc_get_symbol (name, NULL, &sym)) | |
6700 | return MATCH_ERROR; | |
6701 | ||
6702 | if (sym->ts.type != BT_UNKNOWN) | |
6703 | { | |
6704 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
6705 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
6706 | return MATCH_ERROR; | |
6707 | } | |
6708 | ||
6709 | /* The symbol may already have the derived attribute without the | |
6710 | components. The ways this can happen is via a function | |
6711 | definition, an INTRINSIC statement or a subtype in another | |
6712 | derived type that is a pointer. The first part of the AND clause | |
69b1505f | 6713 | is true if the symbol is not the return value of a function. */ |
4ee9c684 | 6714 | if (sym->attr.flavor != FL_DERIVED |
950683ed | 6715 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 6716 | return MATCH_ERROR; |
6717 | ||
e6b82afc | 6718 | if (sym->components != NULL || sym->attr.zero_comp) |
4ee9c684 | 6719 | { |
1a9745d2 | 6720 | gfc_error ("Derived type definition of '%s' at %C has already been " |
6721 | "defined", sym->name); | |
4ee9c684 | 6722 | return MATCH_ERROR; |
6723 | } | |
6724 | ||
6725 | if (attr.access != ACCESS_UNKNOWN | |
950683ed | 6726 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
4ee9c684 | 6727 | return MATCH_ERROR; |
6728 | ||
c5d33754 | 6729 | /* See if the derived type was labeled as bind(c). */ |
6730 | if (attr.is_bind_c != 0) | |
6731 | sym->attr.is_bind_c = attr.is_bind_c; | |
6732 | ||
223f0f57 | 6733 | /* Construct the f2k_derived namespace if it is not yet there. */ |
6734 | if (!sym->f2k_derived) | |
6735 | sym->f2k_derived = gfc_get_namespace (NULL, 0); | |
ea94d76d | 6736 | |
6737 | if (extended && !sym->components) | |
6738 | { | |
6739 | gfc_component *p; | |
6740 | gfc_symtree *st; | |
6741 | ||
6742 | /* Add the extended derived type as the first component. */ | |
6743 | gfc_add_component (sym, parent, &p); | |
e485ad6b | 6744 | sym->attr.extension = attr.extension; |
ea94d76d | 6745 | extended->refs++; |
6746 | gfc_set_sym_referenced (extended); | |
6747 | ||
6748 | p->ts.type = BT_DERIVED; | |
6749 | p->ts.derived = extended; | |
6750 | p->initializer = gfc_default_initializer (&p->ts); | |
6751 | ||
6752 | /* Provide the links between the extended type and its extension. */ | |
6753 | if (!extended->f2k_derived) | |
6754 | extended->f2k_derived = gfc_get_namespace (NULL, 0); | |
6755 | st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name); | |
6756 | st->n.sym = sym; | |
6757 | } | |
6758 | ||
ac5f2650 | 6759 | /* Take over the ABSTRACT attribute. */ |
6760 | sym->attr.abstract = attr.abstract; | |
6761 | ||
4ee9c684 | 6762 | gfc_new_block = sym; |
6763 | ||
6764 | return MATCH_YES; | |
6765 | } | |
b549d2a5 | 6766 | |
6767 | ||
6768 | /* Cray Pointees can be declared as: | |
6769 | pointer (ipt, a (n,m,...,*)) | |
6770 | By default, this is treated as an AS_ASSUMED_SIZE array. We'll | |
6771 | cheat and set a constant bound of 1 for the last dimension, if this | |
6772 | is the case. Since there is no bounds-checking for Cray Pointees, | |
6773 | this will be okay. */ | |
6774 | ||
8458f4ca | 6775 | match |
b549d2a5 | 6776 | gfc_mod_pointee_as (gfc_array_spec *as) |
6777 | { | |
6778 | as->cray_pointee = true; /* This will be useful to know later. */ | |
6779 | if (as->type == AS_ASSUMED_SIZE) | |
6780 | { | |
6781 | as->type = AS_EXPLICIT; | |
6782 | as->upper[as->rank - 1] = gfc_int_expr (1); | |
6783 | as->cp_was_assumed = true; | |
6784 | } | |
6785 | else if (as->type == AS_ASSUMED_SHAPE) | |
6786 | { | |
6787 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
6788 | return MATCH_ERROR; | |
6789 | } | |
6790 | return MATCH_YES; | |
6791 | } | |
3b6a4b41 | 6792 | |
6793 | ||
6794 | /* Match the enum definition statement, here we are trying to match | |
6795 | the first line of enum definition statement. | |
6796 | Returns MATCH_YES if match is found. */ | |
6797 | ||
6798 | match | |
6799 | gfc_match_enum (void) | |
6800 | { | |
6801 | match m; | |
6802 | ||
6803 | m = gfc_match_eos (); | |
6804 | if (m != MATCH_YES) | |
6805 | return m; | |
6806 | ||
60fbbf9e | 6807 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") |
3b6a4b41 | 6808 | == FAILURE) |
6809 | return MATCH_ERROR; | |
6810 | ||
6811 | return MATCH_YES; | |
6812 | } | |
6813 | ||
6814 | ||
fe1328da | 6815 | /* Returns an initializer whose value is one higher than the value of the |
6816 | LAST_INITIALIZER argument. If the argument is NULL, the | |
6817 | initializers value will be set to zero. The initializer's kind | |
6818 | will be set to gfc_c_int_kind. | |
6819 | ||
6820 | If -fshort-enums is given, the appropriate kind will be selected | |
6821 | later after all enumerators have been parsed. A warning is issued | |
6822 | here if an initializer exceeds gfc_c_int_kind. */ | |
6823 | ||
6824 | static gfc_expr * | |
6825 | enum_initializer (gfc_expr *last_initializer, locus where) | |
6826 | { | |
6827 | gfc_expr *result; | |
6828 | ||
6829 | result = gfc_get_expr (); | |
6830 | result->expr_type = EXPR_CONSTANT; | |
6831 | result->ts.type = BT_INTEGER; | |
6832 | result->ts.kind = gfc_c_int_kind; | |
6833 | result->where = where; | |
6834 | ||
6835 | mpz_init (result->value.integer); | |
6836 | ||
6837 | if (last_initializer != NULL) | |
6838 | { | |
6839 | mpz_add_ui (result->value.integer, last_initializer->value.integer, 1); | |
6840 | result->where = last_initializer->where; | |
6841 | ||
6842 | if (gfc_check_integer_range (result->value.integer, | |
6843 | gfc_c_int_kind) != ARITH_OK) | |
6844 | { | |
6845 | gfc_error ("Enumerator exceeds the C integer type at %C"); | |
6846 | return NULL; | |
6847 | } | |
6848 | } | |
6849 | else | |
6850 | { | |
6851 | /* Control comes here, if it's the very first enumerator and no | |
6852 | initializer has been given. It will be initialized to zero. */ | |
6853 | mpz_set_si (result->value.integer, 0); | |
6854 | } | |
6855 | ||
6856 | return result; | |
6857 | } | |
6858 | ||
6859 | ||
60fbbf9e | 6860 | /* Match a variable name with an optional initializer. When this |
6861 | subroutine is called, a variable is expected to be parsed next. | |
6862 | Depending on what is happening at the moment, updates either the | |
6863 | symbol table or the current interface. */ | |
6864 | ||
6865 | static match | |
6866 | enumerator_decl (void) | |
6867 | { | |
6868 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6869 | gfc_expr *initializer; | |
6870 | gfc_array_spec *as = NULL; | |
6871 | gfc_symbol *sym; | |
6872 | locus var_locus; | |
6873 | match m; | |
f6bb8f4b | 6874 | gfc_try t; |
60fbbf9e | 6875 | locus old_locus; |
6876 | ||
6877 | initializer = NULL; | |
6878 | old_locus = gfc_current_locus; | |
6879 | ||
6880 | /* When we get here, we've just matched a list of attributes and | |
6881 | maybe a type and a double colon. The next thing we expect to see | |
6882 | is the name of the symbol. */ | |
6883 | m = gfc_match_name (name); | |
6884 | if (m != MATCH_YES) | |
6885 | goto cleanup; | |
6886 | ||
6887 | var_locus = gfc_current_locus; | |
6888 | ||
6889 | /* OK, we've successfully matched the declaration. Now put the | |
6890 | symbol in the current namespace. If we fail to create the symbol, | |
6891 | bail out. */ | |
6892 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
6893 | { | |
6894 | m = MATCH_ERROR; | |
6895 | goto cleanup; | |
6896 | } | |
6897 | ||
6898 | /* The double colon must be present in order to have initializers. | |
6899 | Otherwise the statement is ambiguous with an assignment statement. */ | |
6900 | if (colon_seen) | |
6901 | { | |
6902 | if (gfc_match_char ('=') == MATCH_YES) | |
6903 | { | |
6904 | m = gfc_match_init_expr (&initializer); | |
6905 | if (m == MATCH_NO) | |
6906 | { | |
6907 | gfc_error ("Expected an initialization expression at %C"); | |
6908 | m = MATCH_ERROR; | |
6909 | } | |
6910 | ||
6911 | if (m != MATCH_YES) | |
6912 | goto cleanup; | |
6913 | } | |
6914 | } | |
6915 | ||
6916 | /* If we do not have an initializer, the initialization value of the | |
6917 | previous enumerator (stored in last_initializer) is incremented | |
6918 | by 1 and is used to initialize the current enumerator. */ | |
6919 | if (initializer == NULL) | |
fe1328da | 6920 | initializer = enum_initializer (last_initializer, old_locus); |
e14bee04 | 6921 | |
60fbbf9e | 6922 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
6923 | { | |
6924 | gfc_error("ENUMERATOR %L not initialized with integer expression", | |
6925 | &var_locus); | |
e14bee04 | 6926 | m = MATCH_ERROR; |
60fbbf9e | 6927 | gfc_free_enum_history (); |
6928 | goto cleanup; | |
6929 | } | |
6930 | ||
6931 | /* Store this current initializer, for the next enumerator variable | |
6932 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
6933 | use last_initializer below. */ | |
6934 | last_initializer = initializer; | |
6935 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
6936 | ||
6937 | /* Maintain enumerator history. */ | |
6938 | gfc_find_symbol (name, NULL, 0, &sym); | |
6939 | create_enum_history (sym, last_initializer); | |
6940 | ||
6941 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
6942 | ||
6943 | cleanup: | |
6944 | /* Free stuff up and return. */ | |
6945 | gfc_free_expr (initializer); | |
6946 | ||
6947 | return m; | |
6948 | } | |
6949 | ||
6950 | ||
f6d0e37a | 6951 | /* Match the enumerator definition statement. */ |
3b6a4b41 | 6952 | |
6953 | match | |
6954 | gfc_match_enumerator_def (void) | |
6955 | { | |
6956 | match m; | |
f6bb8f4b | 6957 | gfc_try t; |
e14bee04 | 6958 | |
3b6a4b41 | 6959 | gfc_clear_ts (¤t_ts); |
e14bee04 | 6960 | |
3b6a4b41 | 6961 | m = gfc_match (" enumerator"); |
6962 | if (m != MATCH_YES) | |
6963 | return m; | |
60fbbf9e | 6964 | |
6965 | m = gfc_match (" :: "); | |
6966 | if (m == MATCH_ERROR) | |
6967 | return m; | |
6968 | ||
6969 | colon_seen = (m == MATCH_YES); | |
e14bee04 | 6970 | |
3b6a4b41 | 6971 | if (gfc_current_state () != COMP_ENUM) |
6972 | { | |
6973 | gfc_error ("ENUM definition statement expected before %C"); | |
6974 | gfc_free_enum_history (); | |
6975 | return MATCH_ERROR; | |
6976 | } | |
6977 | ||
6978 | (¤t_ts)->type = BT_INTEGER; | |
6979 | (¤t_ts)->kind = gfc_c_int_kind; | |
e14bee04 | 6980 | |
60fbbf9e | 6981 | gfc_clear_attr (¤t_attr); |
6982 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
6983 | if (t == FAILURE) | |
3b6a4b41 | 6984 | { |
60fbbf9e | 6985 | m = MATCH_ERROR; |
3b6a4b41 | 6986 | goto cleanup; |
6987 | } | |
6988 | ||
3b6a4b41 | 6989 | for (;;) |
6990 | { | |
60fbbf9e | 6991 | m = enumerator_decl (); |
3b6a4b41 | 6992 | if (m == MATCH_ERROR) |
6993 | goto cleanup; | |
6994 | if (m == MATCH_NO) | |
6995 | break; | |
6996 | ||
6997 | if (gfc_match_eos () == MATCH_YES) | |
6998 | goto cleanup; | |
6999 | if (gfc_match_char (',') != MATCH_YES) | |
7000 | break; | |
7001 | } | |
7002 | ||
7003 | if (gfc_current_state () == COMP_ENUM) | |
7004 | { | |
7005 | gfc_free_enum_history (); | |
7006 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
7007 | m = MATCH_ERROR; | |
7008 | } | |
7009 | ||
7010 | cleanup: | |
7011 | gfc_free_array_spec (current_as); | |
7012 | current_as = NULL; | |
7013 | return m; | |
7014 | ||
7015 | } | |
7016 | ||
e449e4dd | 7017 | |
7fd88f6e | 7018 | /* Match binding attributes. */ |
7019 | ||
7020 | static match | |
64e93293 | 7021 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc) |
7fd88f6e | 7022 | { |
7023 | bool found_passing = false; | |
64e93293 | 7024 | bool seen_ptr = false; |
fe9b08a2 | 7025 | match m = MATCH_YES; |
7fd88f6e | 7026 | |
7027 | /* Intialize to defaults. Do so even before the MATCH_NO check so that in | |
7028 | this case the defaults are in there. */ | |
7029 | ba->access = ACCESS_UNKNOWN; | |
7030 | ba->pass_arg = NULL; | |
7031 | ba->pass_arg_num = 0; | |
7032 | ba->nopass = 0; | |
7033 | ba->non_overridable = 0; | |
61c3b81d | 7034 | ba->deferred = 0; |
fe9b08a2 | 7035 | ba->ppc = ppc; |
7fd88f6e | 7036 | |
7037 | /* If we find a comma, we believe there are binding attributes. */ | |
fe9b08a2 | 7038 | m = gfc_match_char (','); |
7039 | if (m == MATCH_NO) | |
7040 | goto done; | |
7fd88f6e | 7041 | |
7042 | do | |
7043 | { | |
e2f06a48 | 7044 | /* Access specifier. */ |
7045 | ||
7046 | m = gfc_match (" public"); | |
7fd88f6e | 7047 | if (m == MATCH_ERROR) |
7048 | goto error; | |
7049 | if (m == MATCH_YES) | |
7050 | { | |
e2f06a48 | 7051 | if (ba->access != ACCESS_UNKNOWN) |
7fd88f6e | 7052 | { |
e2f06a48 | 7053 | gfc_error ("Duplicate access-specifier at %C"); |
7fd88f6e | 7054 | goto error; |
7055 | } | |
7056 | ||
e2f06a48 | 7057 | ba->access = ACCESS_PUBLIC; |
7fd88f6e | 7058 | continue; |
7059 | } | |
7060 | ||
e2f06a48 | 7061 | m = gfc_match (" private"); |
7fd88f6e | 7062 | if (m == MATCH_ERROR) |
7063 | goto error; | |
7064 | if (m == MATCH_YES) | |
7065 | { | |
e2f06a48 | 7066 | if (ba->access != ACCESS_UNKNOWN) |
7fd88f6e | 7067 | { |
e2f06a48 | 7068 | gfc_error ("Duplicate access-specifier at %C"); |
7fd88f6e | 7069 | goto error; |
7070 | } | |
7071 | ||
e2f06a48 | 7072 | ba->access = ACCESS_PRIVATE; |
7fd88f6e | 7073 | continue; |
7074 | } | |
7075 | ||
e2f06a48 | 7076 | /* If inside GENERIC, the following is not allowed. */ |
7077 | if (!generic) | |
7fd88f6e | 7078 | { |
7fd88f6e | 7079 | |
e2f06a48 | 7080 | /* NOPASS flag. */ |
7081 | m = gfc_match (" nopass"); | |
7082 | if (m == MATCH_ERROR) | |
7083 | goto error; | |
7084 | if (m == MATCH_YES) | |
7fd88f6e | 7085 | { |
e2f06a48 | 7086 | if (found_passing) |
7087 | { | |
7088 | gfc_error ("Binding attributes already specify passing," | |
7089 | " illegal NOPASS at %C"); | |
7090 | goto error; | |
7091 | } | |
7092 | ||
7093 | found_passing = true; | |
7094 | ba->nopass = 1; | |
7095 | continue; | |
7fd88f6e | 7096 | } |
7097 | ||
e2f06a48 | 7098 | /* PASS possibly including argument. */ |
7099 | m = gfc_match (" pass"); | |
7100 | if (m == MATCH_ERROR) | |
7101 | goto error; | |
7102 | if (m == MATCH_YES) | |
7fd88f6e | 7103 | { |
e2f06a48 | 7104 | char arg[GFC_MAX_SYMBOL_LEN + 1]; |
7105 | ||
7106 | if (found_passing) | |
7107 | { | |
7108 | gfc_error ("Binding attributes already specify passing," | |
7109 | " illegal PASS at %C"); | |
7110 | goto error; | |
7111 | } | |
7112 | ||
7113 | m = gfc_match (" ( %n )", arg); | |
7114 | if (m == MATCH_ERROR) | |
7115 | goto error; | |
7116 | if (m == MATCH_YES) | |
fe9b08a2 | 7117 | ba->pass_arg = gfc_get_string (arg); |
e2f06a48 | 7118 | gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL)); |
7119 | ||
7120 | found_passing = true; | |
7121 | ba->nopass = 0; | |
7122 | continue; | |
7fd88f6e | 7123 | } |
7124 | ||
64e93293 | 7125 | if (ppc) |
7126 | { | |
7127 | /* POINTER flag. */ | |
7128 | m = gfc_match (" pointer"); | |
7129 | if (m == MATCH_ERROR) | |
7130 | goto error; | |
7131 | if (m == MATCH_YES) | |
7132 | { | |
7133 | if (seen_ptr) | |
7134 | { | |
7135 | gfc_error ("Duplicate POINTER attribute at %C"); | |
7136 | goto error; | |
7137 | } | |
7138 | ||
7139 | seen_ptr = true; | |
64e93293 | 7140 | continue; |
7141 | } | |
7142 | } | |
7143 | else | |
7144 | { | |
7145 | /* NON_OVERRIDABLE flag. */ | |
7146 | m = gfc_match (" non_overridable"); | |
7147 | if (m == MATCH_ERROR) | |
7148 | goto error; | |
7149 | if (m == MATCH_YES) | |
7150 | { | |
7151 | if (ba->non_overridable) | |
7152 | { | |
7153 | gfc_error ("Duplicate NON_OVERRIDABLE at %C"); | |
7154 | goto error; | |
7155 | } | |
7156 | ||
7157 | ba->non_overridable = 1; | |
7158 | continue; | |
7159 | } | |
7160 | ||
7161 | /* DEFERRED flag. */ | |
7162 | m = gfc_match (" deferred"); | |
7163 | if (m == MATCH_ERROR) | |
7164 | goto error; | |
7165 | if (m == MATCH_YES) | |
7166 | { | |
7167 | if (ba->deferred) | |
7168 | { | |
7169 | gfc_error ("Duplicate DEFERRED at %C"); | |
7170 | goto error; | |
7171 | } | |
7172 | ||
7173 | ba->deferred = 1; | |
7174 | continue; | |
7175 | } | |
7176 | } | |
7177 | ||
7fd88f6e | 7178 | } |
7179 | ||
7180 | /* Nothing matching found. */ | |
e2f06a48 | 7181 | if (generic) |
7182 | gfc_error ("Expected access-specifier at %C"); | |
7183 | else | |
7184 | gfc_error ("Expected binding attribute at %C"); | |
7fd88f6e | 7185 | goto error; |
7186 | } | |
7187 | while (gfc_match_char (',') == MATCH_YES); | |
7188 | ||
61c3b81d | 7189 | /* NON_OVERRIDABLE and DEFERRED exclude themselves. */ |
7190 | if (ba->non_overridable && ba->deferred) | |
7191 | { | |
7192 | gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C"); | |
7193 | goto error; | |
7194 | } | |
7195 | ||
fe9b08a2 | 7196 | m = MATCH_YES; |
7197 | ||
7198 | done: | |
e2f06a48 | 7199 | if (ba->access == ACCESS_UNKNOWN) |
7200 | ba->access = gfc_typebound_default_access; | |
7201 | ||
64e93293 | 7202 | if (ppc && !seen_ptr) |
7203 | { | |
7204 | gfc_error ("POINTER attribute is required for procedure pointer component" | |
7205 | " at %C"); | |
7206 | goto error; | |
7207 | } | |
7208 | ||
fe9b08a2 | 7209 | return m; |
7fd88f6e | 7210 | |
7211 | error: | |
7fd88f6e | 7212 | return MATCH_ERROR; |
7213 | } | |
7214 | ||
7215 | ||
7216 | /* Match a PROCEDURE specific binding inside a derived type. */ | |
7217 | ||
7218 | static match | |
7219 | match_procedure_in_type (void) | |
7220 | { | |
7221 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7222 | char target_buf[GFC_MAX_SYMBOL_LEN + 1]; | |
61c3b81d | 7223 | char* target = NULL; |
7fd88f6e | 7224 | gfc_typebound_proc* tb; |
7225 | bool seen_colons; | |
7226 | bool seen_attrs; | |
7227 | match m; | |
7228 | gfc_symtree* stree; | |
7229 | gfc_namespace* ns; | |
7230 | gfc_symbol* block; | |
7231 | ||
7232 | /* Check current state. */ | |
7233 | gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS); | |
7234 | block = gfc_state_stack->previous->sym; | |
7235 | gcc_assert (block); | |
7236 | ||
61c3b81d | 7237 | /* Try to match PROCEDURE(interface). */ |
7fd88f6e | 7238 | if (gfc_match (" (") == MATCH_YES) |
7239 | { | |
61c3b81d | 7240 | m = gfc_match_name (target_buf); |
7241 | if (m == MATCH_ERROR) | |
7242 | return m; | |
7243 | if (m != MATCH_YES) | |
7244 | { | |
7245 | gfc_error ("Interface-name expected after '(' at %C"); | |
7246 | return MATCH_ERROR; | |
7247 | } | |
7248 | ||
7249 | if (gfc_match (" )") != MATCH_YES) | |
7250 | { | |
7251 | gfc_error ("')' expected at %C"); | |
7252 | return MATCH_ERROR; | |
7253 | } | |
7254 | ||
7255 | target = target_buf; | |
7fd88f6e | 7256 | } |
7257 | ||
7258 | /* Construct the data structure. */ | |
930fe1de | 7259 | tb = gfc_get_typebound_proc (); |
7fd88f6e | 7260 | tb->where = gfc_current_locus; |
e2f06a48 | 7261 | tb->is_generic = 0; |
7fd88f6e | 7262 | |
7263 | /* Match binding attributes. */ | |
64e93293 | 7264 | m = match_binding_attributes (tb, false, false); |
7fd88f6e | 7265 | if (m == MATCH_ERROR) |
7266 | return m; | |
7267 | seen_attrs = (m == MATCH_YES); | |
7268 | ||
61c3b81d | 7269 | /* Check that attribute DEFERRED is given iff an interface is specified, which |
7270 | means target != NULL. */ | |
7271 | if (tb->deferred && !target) | |
7272 | { | |
7273 | gfc_error ("Interface must be specified for DEFERRED binding at %C"); | |
7274 | return MATCH_ERROR; | |
7275 | } | |
7276 | if (target && !tb->deferred) | |
7277 | { | |
7278 | gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED"); | |
7279 | return MATCH_ERROR; | |
7280 | } | |
7281 | ||
7fd88f6e | 7282 | /* Match the colons. */ |
7283 | m = gfc_match (" ::"); | |
7284 | if (m == MATCH_ERROR) | |
7285 | return m; | |
7286 | seen_colons = (m == MATCH_YES); | |
7287 | if (seen_attrs && !seen_colons) | |
7288 | { | |
7289 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
7290 | return MATCH_ERROR; | |
7291 | } | |
7292 | ||
7293 | /* Match the binding name. */ | |
7294 | m = gfc_match_name (name); | |
7295 | if (m == MATCH_ERROR) | |
7296 | return m; | |
7297 | if (m == MATCH_NO) | |
7298 | { | |
7299 | gfc_error ("Expected binding name at %C"); | |
7300 | return MATCH_ERROR; | |
7301 | } | |
7302 | ||
7303 | /* Try to match the '=> target', if it's there. */ | |
7fd88f6e | 7304 | m = gfc_match (" =>"); |
7305 | if (m == MATCH_ERROR) | |
7306 | return m; | |
7307 | if (m == MATCH_YES) | |
7308 | { | |
61c3b81d | 7309 | if (tb->deferred) |
7310 | { | |
7311 | gfc_error ("'=> target' is invalid for DEFERRED binding at %C"); | |
7312 | return MATCH_ERROR; | |
7313 | } | |
7314 | ||
7fd88f6e | 7315 | if (!seen_colons) |
7316 | { | |
7317 | gfc_error ("'::' needed in PROCEDURE binding with explicit target" | |
7318 | " at %C"); | |
7319 | return MATCH_ERROR; | |
7320 | } | |
7321 | ||
7322 | m = gfc_match_name (target_buf); | |
7323 | if (m == MATCH_ERROR) | |
7324 | return m; | |
7325 | if (m == MATCH_NO) | |
7326 | { | |
7327 | gfc_error ("Expected binding target after '=>' at %C"); | |
7328 | return MATCH_ERROR; | |
7329 | } | |
7330 | target = target_buf; | |
7331 | } | |
7332 | ||
7333 | /* Now we should have the end. */ | |
7334 | m = gfc_match_eos (); | |
7335 | if (m == MATCH_ERROR) | |
7336 | return m; | |
7337 | if (m == MATCH_NO) | |
7338 | { | |
7339 | gfc_error ("Junk after PROCEDURE declaration at %C"); | |
7340 | return MATCH_ERROR; | |
7341 | } | |
7342 | ||
7343 | /* If no target was found, it has the same name as the binding. */ | |
7344 | if (!target) | |
7345 | target = name; | |
7346 | ||
7347 | /* Get the namespace to insert the symbols into. */ | |
7348 | ns = block->f2k_derived; | |
7349 | gcc_assert (ns); | |
7350 | ||
61c3b81d | 7351 | /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */ |
7352 | if (tb->deferred && !block->attr.abstract) | |
7353 | { | |
7354 | gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT", | |
7355 | block->name); | |
7356 | return MATCH_ERROR; | |
7357 | } | |
7358 | ||
7fd88f6e | 7359 | /* See if we already have a binding with this name in the symtree which would |
e2f06a48 | 7360 | be an error. If a GENERIC already targetted this binding, it may be |
7361 | already there but then typebound is still NULL. */ | |
3323e9b1 | 7362 | stree = gfc_find_symtree (ns->tb_sym_root, name); |
7363 | if (stree && stree->n.tb) | |
7fd88f6e | 7364 | { |
7365 | gfc_error ("There's already a procedure with binding name '%s' for the" | |
7366 | " derived type '%s' at %C", name, block->name); | |
7367 | return MATCH_ERROR; | |
7368 | } | |
7369 | ||
7370 | /* Insert it and set attributes. */ | |
3323e9b1 | 7371 | |
7372 | if (!stree) | |
7373 | { | |
7374 | stree = gfc_new_symtree (&ns->tb_sym_root, name); | |
7375 | gcc_assert (stree); | |
7376 | } | |
7377 | stree->n.tb = tb; | |
7378 | ||
36b0a1b0 | 7379 | if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific, false)) |
7fd88f6e | 7380 | return MATCH_ERROR; |
e2f06a48 | 7381 | gfc_set_sym_referenced (tb->u.specific->n.sym); |
7fd88f6e | 7382 | |
7383 | return MATCH_YES; | |
7384 | } | |
7385 | ||
7386 | ||
e2f06a48 | 7387 | /* Match a GENERIC procedure binding inside a derived type. */ |
7388 | ||
7389 | match | |
7390 | gfc_match_generic (void) | |
7391 | { | |
7392 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7393 | gfc_symbol* block; | |
7394 | gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */ | |
7395 | gfc_typebound_proc* tb; | |
7396 | gfc_symtree* st; | |
7397 | gfc_namespace* ns; | |
7398 | match m; | |
7399 | ||
7400 | /* Check current state. */ | |
7401 | if (gfc_current_state () == COMP_DERIVED) | |
7402 | { | |
7403 | gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS"); | |
7404 | return MATCH_ERROR; | |
7405 | } | |
7406 | if (gfc_current_state () != COMP_DERIVED_CONTAINS) | |
7407 | return MATCH_NO; | |
7408 | block = gfc_state_stack->previous->sym; | |
7409 | ns = block->f2k_derived; | |
7410 | gcc_assert (block && ns); | |
7411 | ||
7412 | /* See if we get an access-specifier. */ | |
64e93293 | 7413 | m = match_binding_attributes (&tbattr, true, false); |
e2f06a48 | 7414 | if (m == MATCH_ERROR) |
7415 | goto error; | |
7416 | ||
7417 | /* Now the colons, those are required. */ | |
7418 | if (gfc_match (" ::") != MATCH_YES) | |
7419 | { | |
7420 | gfc_error ("Expected '::' at %C"); | |
7421 | goto error; | |
7422 | } | |
7423 | ||
7424 | /* The binding name and =>. */ | |
7425 | m = gfc_match (" %n =>", name); | |
7426 | if (m == MATCH_ERROR) | |
7427 | return MATCH_ERROR; | |
7428 | if (m == MATCH_NO) | |
7429 | { | |
7430 | gfc_error ("Expected generic name at %C"); | |
7431 | goto error; | |
7432 | } | |
7433 | ||
7434 | /* If there's already something with this name, check that it is another | |
7435 | GENERIC and then extend that rather than build a new node. */ | |
3323e9b1 | 7436 | st = gfc_find_symtree (ns->tb_sym_root, name); |
e2f06a48 | 7437 | if (st) |
7438 | { | |
3323e9b1 | 7439 | gcc_assert (st->n.tb); |
7440 | tb = st->n.tb; | |
7441 | ||
7442 | if (!tb->is_generic) | |
e2f06a48 | 7443 | { |
7444 | gfc_error ("There's already a non-generic procedure with binding name" | |
7445 | " '%s' for the derived type '%s' at %C", | |
7446 | name, block->name); | |
7447 | goto error; | |
7448 | } | |
7449 | ||
e2f06a48 | 7450 | if (tb->access != tbattr.access) |
7451 | { | |
7452 | gfc_error ("Binding at %C must have the same access as already" | |
7453 | " defined binding '%s'", name); | |
7454 | goto error; | |
7455 | } | |
7456 | } | |
7457 | else | |
7458 | { | |
3323e9b1 | 7459 | st = gfc_new_symtree (&ns->tb_sym_root, name); |
7460 | gcc_assert (st); | |
e2f06a48 | 7461 | |
3323e9b1 | 7462 | st->n.tb = tb = gfc_get_typebound_proc (); |
e2f06a48 | 7463 | tb->where = gfc_current_locus; |
7464 | tb->access = tbattr.access; | |
7465 | tb->is_generic = 1; | |
7466 | tb->u.generic = NULL; | |
7467 | } | |
7468 | ||
7469 | /* Now, match all following names as specific targets. */ | |
7470 | do | |
7471 | { | |
7472 | gfc_symtree* target_st; | |
7473 | gfc_tbp_generic* target; | |
7474 | ||
7475 | m = gfc_match_name (name); | |
7476 | if (m == MATCH_ERROR) | |
7477 | goto error; | |
7478 | if (m == MATCH_NO) | |
7479 | { | |
7480 | gfc_error ("Expected specific binding name at %C"); | |
7481 | goto error; | |
7482 | } | |
7483 | ||
3323e9b1 | 7484 | target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name); |
e2f06a48 | 7485 | |
7486 | /* See if this is a duplicate specification. */ | |
7487 | for (target = tb->u.generic; target; target = target->next) | |
7488 | if (target_st == target->specific_st) | |
7489 | { | |
7490 | gfc_error ("'%s' already defined as specific binding for the" | |
3323e9b1 | 7491 | " generic '%s' at %C", name, st->name); |
e2f06a48 | 7492 | goto error; |
7493 | } | |
7494 | ||
e2f06a48 | 7495 | target = gfc_get_tbp_generic (); |
7496 | target->specific_st = target_st; | |
7497 | target->specific = NULL; | |
7498 | target->next = tb->u.generic; | |
7499 | tb->u.generic = target; | |
7500 | } | |
7501 | while (gfc_match (" ,") == MATCH_YES); | |
7502 | ||
7503 | /* Here should be the end. */ | |
7504 | if (gfc_match_eos () != MATCH_YES) | |
7505 | { | |
7506 | gfc_error ("Junk after GENERIC binding at %C"); | |
7507 | goto error; | |
7508 | } | |
7509 | ||
7510 | return MATCH_YES; | |
7511 | ||
7512 | error: | |
7513 | return MATCH_ERROR; | |
7514 | } | |
7515 | ||
7516 | ||
223f0f57 | 7517 | /* Match a FINAL declaration inside a derived type. */ |
7518 | ||
7519 | match | |
7520 | gfc_match_final_decl (void) | |
7521 | { | |
7522 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7523 | gfc_symbol* sym; | |
7524 | match m; | |
7525 | gfc_namespace* module_ns; | |
7526 | bool first, last; | |
7fd88f6e | 7527 | gfc_symbol* block; |
223f0f57 | 7528 | |
7fd88f6e | 7529 | if (gfc_state_stack->state != COMP_DERIVED_CONTAINS) |
223f0f57 | 7530 | { |
7531 | gfc_error ("FINAL declaration at %C must be inside a derived type " | |
7fd88f6e | 7532 | "CONTAINS section"); |
223f0f57 | 7533 | return MATCH_ERROR; |
7534 | } | |
7535 | ||
7fd88f6e | 7536 | block = gfc_state_stack->previous->sym; |
7537 | gcc_assert (block); | |
223f0f57 | 7538 | |
7fd88f6e | 7539 | if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous |
7540 | || gfc_state_stack->previous->previous->state != COMP_MODULE) | |
223f0f57 | 7541 | { |
7542 | gfc_error ("Derived type declaration with FINAL at %C must be in the" | |
7543 | " specification part of a MODULE"); | |
7544 | return MATCH_ERROR; | |
7545 | } | |
7546 | ||
7547 | module_ns = gfc_current_ns; | |
7548 | gcc_assert (module_ns); | |
7549 | gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE); | |
7550 | ||
7551 | /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */ | |
7552 | if (gfc_match (" ::") == MATCH_ERROR) | |
7553 | return MATCH_ERROR; | |
7554 | ||
7555 | /* Match the sequence of procedure names. */ | |
7556 | first = true; | |
7557 | last = false; | |
7558 | do | |
7559 | { | |
7560 | gfc_finalizer* f; | |
7561 | ||
7562 | if (first && gfc_match_eos () == MATCH_YES) | |
7563 | { | |
7564 | gfc_error ("Empty FINAL at %C"); | |
7565 | return MATCH_ERROR; | |
7566 | } | |
7567 | ||
7568 | m = gfc_match_name (name); | |
7569 | if (m == MATCH_NO) | |
7570 | { | |
7571 | gfc_error ("Expected module procedure name at %C"); | |
7572 | return MATCH_ERROR; | |
7573 | } | |
7574 | else if (m != MATCH_YES) | |
7575 | return MATCH_ERROR; | |
7576 | ||
7577 | if (gfc_match_eos () == MATCH_YES) | |
7578 | last = true; | |
7579 | if (!last && gfc_match_char (',') != MATCH_YES) | |
7580 | { | |
7581 | gfc_error ("Expected ',' at %C"); | |
7582 | return MATCH_ERROR; | |
7583 | } | |
7584 | ||
7585 | if (gfc_get_symbol (name, module_ns, &sym)) | |
7586 | { | |
7587 | gfc_error ("Unknown procedure name \"%s\" at %C", name); | |
7588 | return MATCH_ERROR; | |
7589 | } | |
7590 | ||
7591 | /* Mark the symbol as module procedure. */ | |
7592 | if (sym->attr.proc != PROC_MODULE | |
7593 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
7594 | sym->name, NULL) == FAILURE) | |
7595 | return MATCH_ERROR; | |
7596 | ||
7597 | /* Check if we already have this symbol in the list, this is an error. */ | |
7fd88f6e | 7598 | for (f = block->f2k_derived->finalizers; f; f = f->next) |
e449e4dd | 7599 | if (f->proc_sym == sym) |
223f0f57 | 7600 | { |
7601 | gfc_error ("'%s' at %C is already defined as FINAL procedure!", | |
7602 | name); | |
7603 | return MATCH_ERROR; | |
7604 | } | |
7605 | ||
7606 | /* Add this symbol to the list of finalizers. */ | |
7fd88f6e | 7607 | gcc_assert (block->f2k_derived); |
223f0f57 | 7608 | ++sym->refs; |
48d8ad5a | 7609 | f = XCNEW (gfc_finalizer); |
e449e4dd | 7610 | f->proc_sym = sym; |
7611 | f->proc_tree = NULL; | |
223f0f57 | 7612 | f->where = gfc_current_locus; |
7fd88f6e | 7613 | f->next = block->f2k_derived->finalizers; |
7614 | block->f2k_derived->finalizers = f; | |
223f0f57 | 7615 | |
7616 | first = false; | |
7617 | } | |
7618 | while (!last); | |
7619 | ||
7620 | return MATCH_YES; | |
7621 | } | |
36b0a1b0 | 7622 | |
7623 | ||
7624 | const ext_attr_t ext_attr_list[] = { | |
7625 | { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" }, | |
7626 | { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" }, | |
7627 | { "cdecl", EXT_ATTR_CDECL, "cdecl" }, | |
7628 | { "stdcall", EXT_ATTR_STDCALL, "stdcall" }, | |
7629 | { "fastcall", EXT_ATTR_FASTCALL, "fastcall" }, | |
7630 | { NULL, EXT_ATTR_LAST, NULL } | |
7631 | }; | |
7632 | ||
7633 | /* Match a !GCC$ ATTRIBUTES statement of the form: | |
7634 | !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ... | |
7635 | When we come here, we have already matched the !GCC$ ATTRIBUTES string. | |
7636 | ||
7637 | TODO: We should support all GCC attributes using the same syntax for | |
7638 | the attribute list, i.e. the list in C | |
7639 | __attributes(( attribute-list )) | |
7640 | matches then | |
7641 | !GCC$ ATTRIBUTES attribute-list :: | |
7642 | Cf. c-parser.c's c_parser_attributes; the data can then directly be | |
7643 | saved into a TREE. | |
7644 | ||
7645 | As there is absolutely no risk of confusion, we should never return | |
7646 | MATCH_NO. */ | |
7647 | match | |
7648 | gfc_match_gcc_attributes (void) | |
7649 | { | |
7650 | symbol_attribute attr; | |
7651 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7652 | unsigned id; | |
7653 | gfc_symbol *sym; | |
7654 | match m; | |
7655 | ||
7656 | gfc_clear_attr (&attr); | |
7657 | for(;;) | |
7658 | { | |
7659 | char ch; | |
7660 | ||
7661 | if (gfc_match_name (name) != MATCH_YES) | |
7662 | return MATCH_ERROR; | |
7663 | ||
7664 | for (id = 0; id < EXT_ATTR_LAST; id++) | |
7665 | if (strcmp (name, ext_attr_list[id].name) == 0) | |
7666 | break; | |
7667 | ||
7668 | if (id == EXT_ATTR_LAST) | |
7669 | { | |
7670 | gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C"); | |
7671 | return MATCH_ERROR; | |
7672 | } | |
7673 | ||
7674 | if (gfc_add_ext_attribute (&attr, id, &gfc_current_locus) | |
7675 | == FAILURE) | |
7676 | return MATCH_ERROR; | |
7677 | ||
7678 | gfc_gobble_whitespace (); | |
7679 | ch = gfc_next_ascii_char (); | |
7680 | if (ch == ':') | |
7681 | { | |
7682 | /* This is the successful exit condition for the loop. */ | |
7683 | if (gfc_next_ascii_char () == ':') | |
7684 | break; | |
7685 | } | |
7686 | ||
7687 | if (ch == ',') | |
7688 | continue; | |
7689 | ||
7690 | goto syntax; | |
7691 | } | |
7692 | ||
7693 | if (gfc_match_eos () == MATCH_YES) | |
7694 | goto syntax; | |
7695 | ||
7696 | for(;;) | |
7697 | { | |
7698 | m = gfc_match_name (name); | |
7699 | if (m != MATCH_YES) | |
7700 | return m; | |
7701 | ||
7702 | if (find_special (name, &sym, true)) | |
7703 | return MATCH_ERROR; | |
7704 | ||
7705 | sym->attr.ext_attr |= attr.ext_attr; | |
7706 | ||
7707 | if (gfc_match_eos () == MATCH_YES) | |
7708 | break; | |
7709 | ||
7710 | if (gfc_match_char (',') != MATCH_YES) | |
7711 | goto syntax; | |
7712 | } | |
7713 | ||
7714 | return MATCH_YES; | |
7715 | ||
7716 | syntax: | |
7717 | gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C"); | |
7718 | return MATCH_ERROR; | |
7719 | } |