]>
Commit | Line | Data |
---|---|---|
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 | |
eeebe20b | 625 | && e->symtree->n.sym->ts.u.cl |
626 | && e->symtree->n.sym->ts.u.cl->length->ts.type == BT_UNKNOWN) | |
294d58d3 | 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 | { | |
8e9b41f0 | 658 | if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: " |
659 | "Old-style character length at %C") == FAILURE) | |
660 | return MATCH_ERROR; | |
4ee9c684 | 661 | *expr = gfc_int_expr (length); |
662 | return m; | |
663 | } | |
664 | ||
665 | if (gfc_match_char ('(') == MATCH_NO) | |
666 | goto syntax; | |
667 | ||
668 | m = char_len_param_value (expr); | |
077932f9 | 669 | if (m != MATCH_YES && gfc_matching_function) |
670 | { | |
671 | gfc_undo_symbols (); | |
672 | m = MATCH_YES; | |
673 | } | |
674 | ||
4ee9c684 | 675 | if (m == MATCH_ERROR) |
676 | return m; | |
677 | if (m == MATCH_NO) | |
678 | goto syntax; | |
679 | ||
680 | if (gfc_match_char (')') == MATCH_NO) | |
681 | { | |
682 | gfc_free_expr (*expr); | |
683 | *expr = NULL; | |
684 | goto syntax; | |
685 | } | |
686 | ||
687 | return MATCH_YES; | |
688 | ||
689 | syntax: | |
690 | gfc_error ("Syntax error in character length specification at %C"); | |
691 | return MATCH_ERROR; | |
692 | } | |
693 | ||
694 | ||
ee893be6 | 695 | /* Special subroutine for finding a symbol. Check if the name is found |
696 | in the current name space. If not, and we're compiling a function or | |
697 | subroutine and the parent compilation unit is an interface, then check | |
698 | to see if the name we've been given is the name of the interface | |
699 | (located in another namespace). */ | |
4ee9c684 | 700 | |
701 | static int | |
36b0a1b0 | 702 | find_special (const char *name, gfc_symbol **result, bool allow_subroutine) |
4ee9c684 | 703 | { |
704 | gfc_state_data *s; | |
36b0a1b0 | 705 | gfc_symtree *st; |
ee893be6 | 706 | int i; |
4ee9c684 | 707 | |
36b0a1b0 | 708 | i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine); |
e14bee04 | 709 | if (i == 0) |
36b0a1b0 | 710 | { |
711 | *result = st ? st->n.sym : NULL; | |
712 | goto end; | |
713 | } | |
e14bee04 | 714 | |
4ee9c684 | 715 | if (gfc_current_state () != COMP_SUBROUTINE |
716 | && gfc_current_state () != COMP_FUNCTION) | |
ee893be6 | 717 | goto end; |
4ee9c684 | 718 | |
719 | s = gfc_state_stack->previous; | |
720 | if (s == NULL) | |
ee893be6 | 721 | goto end; |
4ee9c684 | 722 | |
723 | if (s->state != COMP_INTERFACE) | |
ee893be6 | 724 | goto end; |
4ee9c684 | 725 | if (s->sym == NULL) |
f6d0e37a | 726 | goto end; /* Nameless interface. */ |
4ee9c684 | 727 | |
728 | if (strcmp (name, s->sym->name) == 0) | |
729 | { | |
730 | *result = s->sym; | |
731 | return 0; | |
732 | } | |
733 | ||
ee893be6 | 734 | end: |
735 | return i; | |
4ee9c684 | 736 | } |
737 | ||
738 | ||
739 | /* Special subroutine for getting a symbol node associated with a | |
740 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
741 | symbol is created in the parent using with symtree node in the | |
742 | child unit pointing to the symbol. If the current namespace has no | |
743 | parent, then the symbol is just created in the current unit. */ | |
744 | ||
745 | static int | |
1a9745d2 | 746 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
4ee9c684 | 747 | { |
748 | gfc_symtree *st; | |
749 | gfc_symbol *sym; | |
2ddb8ed9 | 750 | int rc = 0; |
4ee9c684 | 751 | |
d77f260f | 752 | /* Module functions have to be left in their own namespace because |
753 | they have potentially (almost certainly!) already been referenced. | |
754 | In this sense, they are rather like external functions. This is | |
755 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
756 | space is set to point to the master function, so that the fake | |
757 | result mechanism can work. */ | |
758 | if (module_fcn_entry) | |
861d824f | 759 | { |
760 | /* Present if entry is declared to be a module procedure. */ | |
761 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); | |
c6a05992 | 762 | |
861d824f | 763 | if (*result == NULL) |
764 | rc = gfc_get_symbol (name, NULL, result); | |
a78f714d | 765 | else if (!gfc_get_symbol (name, NULL, &sym) && sym |
c6a05992 | 766 | && (*result)->ts.type == BT_UNKNOWN |
767 | && sym->attr.flavor == FL_UNKNOWN) | |
768 | /* Pick up the typespec for the entry, if declared in the function | |
769 | body. Note that this symbol is FL_UNKNOWN because it will | |
770 | only have appeared in a type declaration. The local symtree | |
771 | is set to point to the module symbol and a unique symtree | |
772 | to the local version. This latter ensures a correct clearing | |
773 | of the symbols. */ | |
a78f714d | 774 | { |
775 | /* If the ENTRY proceeds its specification, we need to ensure | |
776 | that this does not raise a "has no IMPLICIT type" error. */ | |
777 | if (sym->ts.type == BT_UNKNOWN) | |
2168078b | 778 | sym->attr.untyped = 1; |
a78f714d | 779 | |
2168078b | 780 | (*result)->ts = sym->ts; |
a78f714d | 781 | |
782 | /* Put the symbol in the procedure namespace so that, should | |
69b1505f | 783 | the ENTRY precede its specification, the specification |
a78f714d | 784 | can be applied. */ |
785 | (*result)->ns = gfc_current_ns; | |
786 | ||
787 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); | |
788 | st->n.sym = *result; | |
789 | st = gfc_get_unique_symtree (gfc_current_ns); | |
790 | st->n.sym = sym; | |
791 | } | |
861d824f | 792 | } |
858f9894 | 793 | else |
794 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
4ee9c684 | 795 | |
2ddb8ed9 | 796 | if (rc) |
797 | return rc; | |
798 | ||
858f9894 | 799 | sym = *result; |
c717e399 | 800 | gfc_current_ns->refs++; |
4ee9c684 | 801 | |
c1977dbe | 802 | if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE) |
858f9894 | 803 | { |
16f49153 | 804 | /* Trap another encompassed procedure with the same name. All |
805 | these conditions are necessary to avoid picking up an entry | |
806 | whose name clashes with that of the encompassing procedure; | |
807 | this is handled using gsymbols to register unique,globally | |
808 | accessible names. */ | |
858f9894 | 809 | if (sym->attr.flavor != 0 |
1a9745d2 | 810 | && sym->attr.proc != 0 |
811 | && (sym->attr.subroutine || sym->attr.function) | |
812 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
858f9894 | 813 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
814 | name, &sym->declared_at); | |
815 | ||
5720fd2f | 816 | /* Trap a procedure with a name the same as interface in the |
817 | encompassing scope. */ | |
818 | if (sym->attr.generic != 0 | |
db697236 | 819 | && (sym->attr.subroutine || sym->attr.function) |
820 | && !sym->attr.mod_proc) | |
5720fd2f | 821 | gfc_error_now ("Name '%s' at %C is already defined" |
822 | " as a generic interface at %L", | |
823 | name, &sym->declared_at); | |
824 | ||
858f9894 | 825 | /* Trap declarations of attributes in encompassing scope. The |
826 | signature for this is that ts.kind is set. Legitimate | |
827 | references only set ts.type. */ | |
828 | if (sym->ts.kind != 0 | |
1a9745d2 | 829 | && !sym->attr.implicit_type |
830 | && sym->attr.proc == 0 | |
831 | && gfc_current_ns->parent != NULL | |
832 | && sym->attr.access == 0 | |
833 | && !module_fcn_entry) | |
834 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
835 | "and must not have attributes declared at %L", | |
858f9894 | 836 | name, &sym->declared_at); |
837 | } | |
838 | ||
839 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
840 | return rc; | |
4ee9c684 | 841 | |
d77f260f | 842 | /* Module function entries will already have a symtree in |
843 | the current namespace but will need one at module level. */ | |
844 | if (module_fcn_entry) | |
861d824f | 845 | { |
846 | /* Present if entry is declared to be a module procedure. */ | |
847 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); | |
848 | if (st == NULL) | |
849 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
850 | } | |
d77f260f | 851 | else |
852 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
4ee9c684 | 853 | |
4ee9c684 | 854 | st->n.sym = sym; |
855 | sym->refs++; | |
856 | ||
f6d0e37a | 857 | /* See if the procedure should be a module procedure. */ |
4ee9c684 | 858 | |
d77f260f | 859 | if (((sym->ns->proc_name != NULL |
861d824f | 860 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
861 | && sym->attr.proc != PROC_MODULE) | |
862 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) | |
863 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
864 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 865 | rc = 2; |
866 | ||
867 | return rc; | |
868 | } | |
869 | ||
870 | ||
c5d33754 | 871 | /* Verify that the given symbol representing a parameter is C |
872 | interoperable, by checking to see if it was marked as such after | |
873 | its declaration. If the given symbol is not interoperable, a | |
874 | warning is reported, thus removing the need to return the status to | |
875 | the calling function. The standard does not require the user use | |
876 | one of the iso_c_binding named constants to declare an | |
877 | interoperable parameter, but we can't be sure if the param is C | |
878 | interop or not if the user doesn't. For example, integer(4) may be | |
879 | legal Fortran, but doesn't have meaning in C. It may interop with | |
880 | a number of the C types, which causes a problem because the | |
881 | compiler can't know which one. This code is almost certainly not | |
882 | portable, and the user will get what they deserve if the C type | |
883 | across platforms isn't always interoperable with integer(4). If | |
884 | the user had used something like integer(c_int) or integer(c_long), | |
885 | the compiler could have automatically handled the varying sizes | |
886 | across platforms. */ | |
887 | ||
f6bb8f4b | 888 | gfc_try |
c5d33754 | 889 | verify_c_interop_param (gfc_symbol *sym) |
890 | { | |
891 | int is_c_interop = 0; | |
f6bb8f4b | 892 | gfc_try retval = SUCCESS; |
c5d33754 | 893 | |
894 | /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). | |
895 | Don't repeat the checks here. */ | |
896 | if (sym->attr.implicit_type) | |
897 | return SUCCESS; | |
898 | ||
899 | /* For subroutines or functions that are passed to a BIND(C) procedure, | |
900 | they're interoperable if they're BIND(C) and their params are all | |
901 | interoperable. */ | |
902 | if (sym->attr.flavor == FL_PROCEDURE) | |
903 | { | |
904 | if (sym->attr.is_bind_c == 0) | |
905 | { | |
906 | gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " | |
907 | "attribute to be C interoperable", sym->name, | |
908 | &(sym->declared_at)); | |
909 | ||
910 | return FAILURE; | |
911 | } | |
912 | else | |
913 | { | |
914 | if (sym->attr.is_c_interop == 1) | |
915 | /* We've already checked this procedure; don't check it again. */ | |
916 | return SUCCESS; | |
917 | else | |
918 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, | |
919 | sym->common_block); | |
920 | } | |
921 | } | |
922 | ||
923 | /* See if we've stored a reference to a procedure that owns sym. */ | |
924 | if (sym->ns != NULL && sym->ns->proc_name != NULL) | |
925 | { | |
926 | if (sym->ns->proc_name->attr.is_bind_c == 1) | |
927 | { | |
928 | is_c_interop = | |
209d3778 | 929 | (verify_c_interop (&(sym->ts)) |
c5d33754 | 930 | == SUCCESS ? 1 : 0); |
931 | ||
932 | if (is_c_interop != 1) | |
933 | { | |
934 | /* Make personalized messages to give better feedback. */ | |
935 | if (sym->ts.type == BT_DERIVED) | |
936 | gfc_error ("Type '%s' at %L is a parameter to the BIND(C) " | |
937 | " procedure '%s' but is not C interoperable " | |
938 | "because derived type '%s' is not C interoperable", | |
939 | sym->name, &(sym->declared_at), | |
940 | sym->ns->proc_name->name, | |
eeebe20b | 941 | sym->ts.u.derived->name); |
c5d33754 | 942 | else |
943 | gfc_warning ("Variable '%s' at %L is a parameter to the " | |
944 | "BIND(C) procedure '%s' but may not be C " | |
945 | "interoperable", | |
946 | sym->name, &(sym->declared_at), | |
947 | sym->ns->proc_name->name); | |
948 | } | |
e4eda3ec | 949 | |
950 | /* Character strings are only C interoperable if they have a | |
951 | length of 1. */ | |
952 | if (sym->ts.type == BT_CHARACTER) | |
953 | { | |
eeebe20b | 954 | gfc_charlen *cl = sym->ts.u.cl; |
e4eda3ec | 955 | if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT |
956 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) | |
957 | { | |
958 | gfc_error ("Character argument '%s' at %L " | |
959 | "must be length 1 because " | |
960 | "procedure '%s' is BIND(C)", | |
961 | sym->name, &sym->declared_at, | |
962 | sym->ns->proc_name->name); | |
963 | retval = FAILURE; | |
964 | } | |
965 | } | |
966 | ||
c5d33754 | 967 | /* We have to make sure that any param to a bind(c) routine does |
968 | not have the allocatable, pointer, or optional attributes, | |
969 | according to J3/04-007, section 5.1. */ | |
970 | if (sym->attr.allocatable == 1) | |
971 | { | |
972 | gfc_error ("Variable '%s' at %L cannot have the " | |
973 | "ALLOCATABLE attribute because procedure '%s'" | |
974 | " is BIND(C)", sym->name, &(sym->declared_at), | |
975 | sym->ns->proc_name->name); | |
976 | retval = FAILURE; | |
977 | } | |
978 | ||
979 | if (sym->attr.pointer == 1) | |
980 | { | |
981 | gfc_error ("Variable '%s' at %L cannot have the " | |
982 | "POINTER attribute because procedure '%s'" | |
983 | " is BIND(C)", sym->name, &(sym->declared_at), | |
984 | sym->ns->proc_name->name); | |
985 | retval = FAILURE; | |
986 | } | |
987 | ||
988 | if (sym->attr.optional == 1) | |
989 | { | |
990 | gfc_error ("Variable '%s' at %L cannot have the " | |
991 | "OPTIONAL attribute because procedure '%s'" | |
992 | " is BIND(C)", sym->name, &(sym->declared_at), | |
993 | sym->ns->proc_name->name); | |
994 | retval = FAILURE; | |
995 | } | |
996 | ||
997 | /* Make sure that if it has the dimension attribute, that it is | |
998 | either assumed size or explicit shape. */ | |
999 | if (sym->as != NULL) | |
1000 | { | |
1001 | if (sym->as->type == AS_ASSUMED_SHAPE) | |
1002 | { | |
1003 | gfc_error ("Assumed-shape array '%s' at %L cannot be an " | |
1004 | "argument to the procedure '%s' at %L because " | |
1005 | "the procedure is BIND(C)", sym->name, | |
1006 | &(sym->declared_at), sym->ns->proc_name->name, | |
1007 | &(sym->ns->proc_name->declared_at)); | |
1008 | retval = FAILURE; | |
1009 | } | |
1010 | ||
1011 | if (sym->as->type == AS_DEFERRED) | |
1012 | { | |
1013 | gfc_error ("Deferred-shape array '%s' at %L cannot be an " | |
1014 | "argument to the procedure '%s' at %L because " | |
1015 | "the procedure is BIND(C)", sym->name, | |
1016 | &(sym->declared_at), sym->ns->proc_name->name, | |
1017 | &(sym->ns->proc_name->declared_at)); | |
1018 | retval = FAILURE; | |
1019 | } | |
1020 | } | |
1021 | } | |
1022 | } | |
1023 | ||
1024 | return retval; | |
1025 | } | |
1026 | ||
1027 | ||
1de1b1a9 | 1028 | /* Build a polymorphic CLASS entity, using the symbol that comes from build_sym. |
1029 | A CLASS entity is represented by an encapsulating type, which contains the | |
1030 | declared type as '$data' component, plus an integer component '$vindex' | |
39f3dea0 | 1031 | which determines the dynamic type, and another integer '$size', which |
1032 | contains the size of the dynamic type structure. */ | |
1de1b1a9 | 1033 | |
1034 | static gfc_try | |
1035 | encapsulate_class_symbol (gfc_typespec *ts, symbol_attribute *attr, | |
1036 | gfc_array_spec **as) | |
1037 | { | |
1038 | char name[GFC_MAX_SYMBOL_LEN + 5]; | |
1039 | gfc_symbol *fclass; | |
1040 | gfc_component *c; | |
1041 | ||
1042 | /* Determine the name of the encapsulating type. */ | |
1043 | if ((*as) && (*as)->rank && attr->allocatable) | |
1044 | sprintf (name, ".class.%s.%d.a", ts->u.derived->name, (*as)->rank); | |
1045 | else if ((*as) && (*as)->rank) | |
1046 | sprintf (name, ".class.%s.%d", ts->u.derived->name, (*as)->rank); | |
1047 | else if (attr->allocatable) | |
1048 | sprintf (name, ".class.%s.a", ts->u.derived->name); | |
1049 | else | |
1050 | sprintf (name, ".class.%s", ts->u.derived->name); | |
1051 | ||
1052 | gfc_find_symbol (name, ts->u.derived->ns, 0, &fclass); | |
1053 | if (fclass == NULL) | |
1054 | { | |
1055 | gfc_symtree *st; | |
1056 | /* If not there, create a new symbol. */ | |
1057 | fclass = gfc_new_symbol (name, ts->u.derived->ns); | |
1058 | st = gfc_new_symtree (&ts->u.derived->ns->sym_root, name); | |
1059 | st->n.sym = fclass; | |
1060 | gfc_set_sym_referenced (fclass); | |
1061 | fclass->refs++; | |
1062 | fclass->ts.type = BT_UNKNOWN; | |
1063 | fclass->vindex = ts->u.derived->vindex; | |
1064 | fclass->attr.abstract = ts->u.derived->attr.abstract; | |
1065 | if (ts->u.derived->f2k_derived) | |
1066 | fclass->f2k_derived = gfc_get_namespace (NULL, 0); | |
1067 | if (gfc_add_flavor (&fclass->attr, FL_DERIVED, | |
1068 | NULL, &gfc_current_locus) == FAILURE) | |
1069 | return FAILURE; | |
1070 | ||
1071 | /* Add component '$data'. */ | |
1072 | if (gfc_add_component (fclass, "$data", &c) == FAILURE) | |
1073 | return FAILURE; | |
1074 | c->ts = *ts; | |
1075 | c->ts.type = BT_DERIVED; | |
1076 | c->attr.access = ACCESS_PRIVATE; | |
1077 | c->ts.u.derived = ts->u.derived; | |
1078 | c->attr.pointer = attr->pointer || attr->dummy; | |
1079 | c->attr.allocatable = attr->allocatable; | |
1080 | c->attr.dimension = attr->dimension; | |
bb1fa9b5 | 1081 | c->attr.abstract = ts->u.derived->attr.abstract; |
1de1b1a9 | 1082 | c->as = (*as); |
1083 | c->initializer = gfc_get_expr (); | |
1084 | c->initializer->expr_type = EXPR_NULL; | |
1085 | ||
1086 | /* Add component '$vindex'. */ | |
1087 | if (gfc_add_component (fclass, "$vindex", &c) == FAILURE) | |
1088 | return FAILURE; | |
1089 | c->ts.type = BT_INTEGER; | |
1090 | c->ts.kind = 4; | |
1091 | c->attr.access = ACCESS_PRIVATE; | |
1092 | c->initializer = gfc_int_expr (0); | |
39f3dea0 | 1093 | |
1094 | /* Add component '$size'. */ | |
1095 | if (gfc_add_component (fclass, "$size", &c) == FAILURE) | |
1096 | return FAILURE; | |
1097 | c->ts.type = BT_INTEGER; | |
1098 | c->ts.kind = 4; | |
1099 | c->attr.access = ACCESS_PRIVATE; | |
1100 | c->initializer = gfc_int_expr (0); | |
1de1b1a9 | 1101 | } |
1102 | ||
1103 | fclass->attr.extension = 1; | |
1104 | fclass->attr.is_class = 1; | |
1105 | ts->u.derived = fclass; | |
1106 | attr->allocatable = attr->pointer = attr->dimension = 0; | |
1107 | (*as) = NULL; /* XXX */ | |
1108 | return SUCCESS; | |
1109 | } | |
1110 | ||
c5d33754 | 1111 | /* Function called by variable_decl() that adds a name to the symbol table. */ |
4ee9c684 | 1112 | |
f6bb8f4b | 1113 | static gfc_try |
1a9745d2 | 1114 | build_sym (const char *name, gfc_charlen *cl, |
1115 | gfc_array_spec **as, locus *var_locus) | |
4ee9c684 | 1116 | { |
1117 | symbol_attribute attr; | |
1118 | gfc_symbol *sym; | |
1119 | ||
ee893be6 | 1120 | if (gfc_get_symbol (name, NULL, &sym)) |
4ee9c684 | 1121 | return FAILURE; |
1122 | ||
f6d0e37a | 1123 | /* Start updating the symbol table. Add basic type attribute if present. */ |
4ee9c684 | 1124 | if (current_ts.type != BT_UNKNOWN |
1a9745d2 | 1125 | && (sym->attr.implicit_type == 0 |
1126 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
4ee9c684 | 1127 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
1128 | return FAILURE; | |
1129 | ||
1130 | if (sym->ts.type == BT_CHARACTER) | |
eeebe20b | 1131 | sym->ts.u.cl = cl; |
4ee9c684 | 1132 | |
1133 | /* Add dimension attribute if present. */ | |
1134 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
1135 | return FAILURE; | |
1136 | *as = NULL; | |
1137 | ||
1138 | /* Add attribute to symbol. The copy is so that we can reset the | |
1139 | dimension attribute. */ | |
1140 | attr = current_attr; | |
1141 | attr.dimension = 0; | |
1142 | ||
1143 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
1144 | return FAILURE; | |
1145 | ||
c5d33754 | 1146 | /* Finish any work that may need to be done for the binding label, |
1147 | if it's a bind(c). The bind(c) attr is found before the symbol | |
1148 | is made, and before the symbol name (for data decls), so the | |
1149 | current_ts is holding the binding label, or nothing if the | |
1150 | name= attr wasn't given. Therefore, test here if we're dealing | |
1151 | with a bind(c) and make sure the binding label is set correctly. */ | |
1152 | if (sym->attr.is_bind_c == 1) | |
1153 | { | |
1154 | if (sym->binding_label[0] == '\0') | |
1155 | { | |
825718f9 | 1156 | /* Set the binding label and verify that if a NAME= was specified |
1157 | then only one identifier was in the entity-decl-list. */ | |
1158 | if (set_binding_label (sym->binding_label, sym->name, | |
1159 | num_idents_on_line) == FAILURE) | |
c5d33754 | 1160 | return FAILURE; |
1161 | } | |
1162 | } | |
1163 | ||
1164 | /* See if we know we're in a common block, and if it's a bind(c) | |
1165 | common then we need to make sure we're an interoperable type. */ | |
1166 | if (sym->attr.in_common == 1) | |
1167 | { | |
1168 | /* Test the common block object. */ | |
1169 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 | |
1170 | && sym->ts.is_c_interop != 1) | |
1171 | { | |
1172 | gfc_error_now ("Variable '%s' in common block '%s' at %C " | |
1173 | "must be declared with a C interoperable " | |
1174 | "kind since common block '%s' is BIND(C)", | |
1175 | sym->name, sym->common_block->name, | |
1176 | sym->common_block->name); | |
1177 | gfc_clear_error (); | |
1178 | } | |
1179 | } | |
1180 | ||
2457a77e | 1181 | sym->attr.implied_index = 0; |
1182 | ||
1de1b1a9 | 1183 | if (sym->ts.type == BT_CLASS) |
b3704193 | 1184 | { |
1185 | sym->attr.class_ok = (sym->attr.dummy | |
1186 | || sym->attr.pointer | |
1187 | || sym->attr.allocatable) ? 1 : 0; | |
1188 | encapsulate_class_symbol (&sym->ts, &sym->attr, &sym->as); | |
1189 | } | |
1de1b1a9 | 1190 | |
4ee9c684 | 1191 | return SUCCESS; |
1192 | } | |
1193 | ||
1a9745d2 | 1194 | |
a270dc8e | 1195 | /* Set character constant to the given length. The constant will be padded or |
d1a39099 | 1196 | truncated. If we're inside an array constructor without a typespec, we |
1197 | additionally check that all elements have the same length; check_len -1 | |
1198 | means no checking. */ | |
a270dc8e | 1199 | |
1200 | void | |
d1a39099 | 1201 | gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len) |
a270dc8e | 1202 | { |
c32f863c | 1203 | gfc_char_t *s; |
a270dc8e | 1204 | int slen; |
1205 | ||
1206 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
b44437b9 | 1207 | gcc_assert (expr->ts.type == BT_CHARACTER); |
a270dc8e | 1208 | |
1209 | slen = expr->value.character.length; | |
1210 | if (len != slen) | |
1211 | { | |
c32f863c | 1212 | s = gfc_get_wide_string (len + 1); |
1213 | memcpy (s, expr->value.character.string, | |
1214 | MIN (len, slen) * sizeof (gfc_char_t)); | |
a270dc8e | 1215 | if (len > slen) |
c32f863c | 1216 | gfc_wide_memset (&s[slen], ' ', len - slen); |
1bfea7e8 | 1217 | |
1218 | if (gfc_option.warn_character_truncation && slen > len) | |
1219 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
1220 | "(%d/%d)", &expr->where, slen, len); | |
1221 | ||
1222 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
1223 | initializers. */ | |
d1a39099 | 1224 | if (check_len != -1 && slen != check_len |
1225 | && !(gfc_option.allow_std & GFC_STD_GNU)) | |
1bfea7e8 | 1226 | gfc_error_now ("The CHARACTER elements of the array constructor " |
1227 | "at %L must have the same length (%d/%d)", | |
d1a39099 | 1228 | &expr->where, slen, check_len); |
1bfea7e8 | 1229 | |
89f528df | 1230 | s[len] = '\0'; |
a270dc8e | 1231 | gfc_free (expr->value.character.string); |
1232 | expr->value.character.string = s; | |
1233 | expr->value.character.length = len; | |
1234 | } | |
1235 | } | |
4ee9c684 | 1236 | |
3b6a4b41 | 1237 | |
e14bee04 | 1238 | /* Function to create and update the enumerator history |
3b6a4b41 | 1239 | using the information passed as arguments. |
e14bee04 | 1240 | Pointer "max_enum" is also updated, to point to |
1241 | enum history node containing largest initializer. | |
3b6a4b41 | 1242 | |
1243 | SYM points to the symbol node of enumerator. | |
f6d0e37a | 1244 | INIT points to its enumerator value. */ |
3b6a4b41 | 1245 | |
e14bee04 | 1246 | static void |
1a9745d2 | 1247 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
3b6a4b41 | 1248 | { |
1249 | enumerator_history *new_enum_history; | |
1250 | gcc_assert (sym != NULL && init != NULL); | |
1251 | ||
48d8ad5a | 1252 | new_enum_history = XCNEW (enumerator_history); |
3b6a4b41 | 1253 | |
1254 | new_enum_history->sym = sym; | |
1255 | new_enum_history->initializer = init; | |
1256 | new_enum_history->next = NULL; | |
1257 | ||
1258 | if (enum_history == NULL) | |
1259 | { | |
1260 | enum_history = new_enum_history; | |
1261 | max_enum = enum_history; | |
1262 | } | |
1263 | else | |
1264 | { | |
1265 | new_enum_history->next = enum_history; | |
1266 | enum_history = new_enum_history; | |
1267 | ||
e14bee04 | 1268 | if (mpz_cmp (max_enum->initializer->value.integer, |
3b6a4b41 | 1269 | new_enum_history->initializer->value.integer) < 0) |
1a9745d2 | 1270 | max_enum = new_enum_history; |
3b6a4b41 | 1271 | } |
1272 | } | |
1273 | ||
1274 | ||
e14bee04 | 1275 | /* Function to free enum kind history. */ |
3b6a4b41 | 1276 | |
e14bee04 | 1277 | void |
1a9745d2 | 1278 | gfc_free_enum_history (void) |
3b6a4b41 | 1279 | { |
e14bee04 | 1280 | enumerator_history *current = enum_history; |
1281 | enumerator_history *next; | |
3b6a4b41 | 1282 | |
1283 | while (current != NULL) | |
1284 | { | |
1285 | next = current->next; | |
1286 | gfc_free (current); | |
1287 | current = next; | |
1288 | } | |
1289 | max_enum = NULL; | |
1290 | enum_history = NULL; | |
1291 | } | |
1292 | ||
1293 | ||
4ee9c684 | 1294 | /* Function called by variable_decl() that adds an initialization |
1295 | expression to a symbol. */ | |
1296 | ||
f6bb8f4b | 1297 | static gfc_try |
f6d0e37a | 1298 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) |
4ee9c684 | 1299 | { |
1300 | symbol_attribute attr; | |
1301 | gfc_symbol *sym; | |
1302 | gfc_expr *init; | |
1303 | ||
1304 | init = *initp; | |
36b0a1b0 | 1305 | if (find_special (name, &sym, false)) |
4ee9c684 | 1306 | return FAILURE; |
1307 | ||
1308 | attr = sym->attr; | |
1309 | ||
1310 | /* If this symbol is confirming an implicit parameter type, | |
1311 | then an initialization expression is not allowed. */ | |
1312 | if (attr.flavor == FL_PARAMETER | |
1313 | && sym->value != NULL | |
1314 | && *initp != NULL) | |
1315 | { | |
1316 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
1317 | sym->name); | |
1318 | return FAILURE; | |
1319 | } | |
1320 | ||
1321 | if (init == NULL) | |
1322 | { | |
1323 | /* An initializer is required for PARAMETER declarations. */ | |
1324 | if (attr.flavor == FL_PARAMETER) | |
1325 | { | |
1326 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
1327 | return FAILURE; | |
1328 | } | |
1329 | } | |
1330 | else | |
1331 | { | |
1332 | /* If a variable appears in a DATA block, it cannot have an | |
b97f1a18 | 1333 | initializer. */ |
4ee9c684 | 1334 | if (sym->attr.data) |
1335 | { | |
1a9745d2 | 1336 | gfc_error ("Variable '%s' at %C with an initializer already " |
1337 | "appears in a DATA statement", sym->name); | |
4ee9c684 | 1338 | return FAILURE; |
1339 | } | |
1340 | ||
cca3db55 | 1341 | /* Check if the assignment can happen. This has to be put off |
1342 | until later for a derived type variable. */ | |
4ee9c684 | 1343 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
1de1b1a9 | 1344 | && sym->ts.type != BT_CLASS && init->ts.type != BT_CLASS |
4ee9c684 | 1345 | && gfc_check_assign_symbol (sym, init) == FAILURE) |
1346 | return FAILURE; | |
1347 | ||
eeebe20b | 1348 | if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl |
da540712 | 1349 | && init->ts.type == BT_CHARACTER) |
a270dc8e | 1350 | { |
1351 | /* Update symbol character length according initializer. */ | |
da540712 | 1352 | if (gfc_check_assign_symbol (sym, init) == FAILURE) |
1353 | return FAILURE; | |
1354 | ||
eeebe20b | 1355 | if (sym->ts.u.cl->length == NULL) |
a270dc8e | 1356 | { |
03c2a028 | 1357 | int clen; |
f6d0e37a | 1358 | /* If there are multiple CHARACTER variables declared on the |
1359 | same line, we don't want them to share the same length. */ | |
d270ce52 | 1360 | sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
e9c873a4 | 1361 | |
03c2a028 | 1362 | if (sym->attr.flavor == FL_PARAMETER) |
1363 | { | |
1364 | if (init->expr_type == EXPR_CONSTANT) | |
1365 | { | |
1366 | clen = init->value.character.length; | |
eeebe20b | 1367 | sym->ts.u.cl->length = gfc_int_expr (clen); |
03c2a028 | 1368 | } |
1369 | else if (init->expr_type == EXPR_ARRAY) | |
1370 | { | |
1371 | gfc_expr *p = init->value.constructor->expr; | |
1372 | clen = p->value.character.length; | |
eeebe20b | 1373 | sym->ts.u.cl->length = gfc_int_expr (clen); |
03c2a028 | 1374 | } |
eeebe20b | 1375 | else if (init->ts.u.cl && init->ts.u.cl->length) |
1376 | sym->ts.u.cl->length = | |
1377 | gfc_copy_expr (sym->value->ts.u.cl->length); | |
03c2a028 | 1378 | } |
a270dc8e | 1379 | } |
1380 | /* Update initializer character length according symbol. */ | |
eeebe20b | 1381 | else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT) |
a270dc8e | 1382 | { |
eeebe20b | 1383 | int len = mpz_get_si (sym->ts.u.cl->length->value.integer); |
a270dc8e | 1384 | gfc_constructor * p; |
1385 | ||
1386 | if (init->expr_type == EXPR_CONSTANT) | |
d1a39099 | 1387 | gfc_set_constant_character_len (len, init, -1); |
a270dc8e | 1388 | else if (init->expr_type == EXPR_ARRAY) |
1389 | { | |
39908fd9 | 1390 | /* Build a new charlen to prevent simplification from |
1391 | deleting the length before it is resolved. */ | |
d270ce52 | 1392 | init->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
eeebe20b | 1393 | init->ts.u.cl->length = gfc_copy_expr (sym->ts.u.cl->length); |
39908fd9 | 1394 | |
a270dc8e | 1395 | for (p = init->value.constructor; p; p = p->next) |
d1a39099 | 1396 | gfc_set_constant_character_len (len, p->expr, -1); |
a270dc8e | 1397 | } |
1398 | } | |
1399 | } | |
1400 | ||
c5d33754 | 1401 | /* Need to check if the expression we initialized this |
1402 | to was one of the iso_c_binding named constants. If so, | |
1403 | and we're a parameter (constant), let it be iso_c. | |
1404 | For example: | |
1405 | integer(c_int), parameter :: my_int = c_int | |
1406 | integer(my_int) :: my_int_2 | |
1407 | If we mark my_int as iso_c (since we can see it's value | |
1408 | is equal to one of the named constants), then my_int_2 | |
1409 | will be considered C interoperable. */ | |
1410 | if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) | |
1411 | { | |
1412 | sym->ts.is_iso_c |= init->ts.is_iso_c; | |
1413 | sym->ts.is_c_interop |= init->ts.is_c_interop; | |
1414 | /* attr bits needed for module files. */ | |
1415 | sym->attr.is_iso_c |= init->ts.is_iso_c; | |
1416 | sym->attr.is_c_interop |= init->ts.is_c_interop; | |
1417 | if (init->ts.is_iso_c) | |
1418 | sym->ts.f90_type = init->ts.f90_type; | |
1419 | } | |
1420 | ||
4ee9c684 | 1421 | /* Add initializer. Make sure we keep the ranks sane. */ |
1422 | if (sym->attr.dimension && init->rank == 0) | |
7baa3fb4 | 1423 | { |
1424 | mpz_t size; | |
1425 | gfc_expr *array; | |
1426 | gfc_constructor *c; | |
1427 | int n; | |
1428 | if (sym->attr.flavor == FL_PARAMETER | |
1429 | && init->expr_type == EXPR_CONSTANT | |
1430 | && spec_size (sym->as, &size) == SUCCESS | |
1431 | && mpz_cmp_si (size, 0) > 0) | |
1432 | { | |
1433 | array = gfc_start_constructor (init->ts.type, init->ts.kind, | |
1434 | &init->where); | |
1435 | ||
1436 | array->value.constructor = c = NULL; | |
1437 | for (n = 0; n < (int)mpz_get_si (size); n++) | |
1438 | { | |
1439 | if (array->value.constructor == NULL) | |
1440 | { | |
1441 | array->value.constructor = c = gfc_get_constructor (); | |
1442 | c->expr = init; | |
1443 | } | |
1444 | else | |
1445 | { | |
1446 | c->next = gfc_get_constructor (); | |
1447 | c = c->next; | |
1448 | c->expr = gfc_copy_expr (init); | |
1449 | } | |
1450 | } | |
1451 | ||
1452 | array->shape = gfc_get_shape (sym->as->rank); | |
1453 | for (n = 0; n < sym->as->rank; n++) | |
1454 | spec_dimen_size (sym->as, n, &array->shape[n]); | |
1455 | ||
1456 | init = array; | |
1457 | mpz_clear (size); | |
1458 | } | |
1459 | init->rank = sym->as->rank; | |
1460 | } | |
4ee9c684 | 1461 | |
1462 | sym->value = init; | |
3cd3c667 | 1463 | if (sym->attr.save == SAVE_NONE) |
1464 | sym->attr.save = SAVE_IMPLICIT; | |
4ee9c684 | 1465 | *initp = NULL; |
1466 | } | |
1467 | ||
1468 | return SUCCESS; | |
1469 | } | |
1470 | ||
1471 | ||
1472 | /* Function called by variable_decl() that adds a name to a structure | |
1473 | being built. */ | |
1474 | ||
f6bb8f4b | 1475 | static gfc_try |
1a9745d2 | 1476 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
1477 | gfc_array_spec **as) | |
4ee9c684 | 1478 | { |
1479 | gfc_component *c; | |
b3704193 | 1480 | gfc_try t = SUCCESS; |
4ee9c684 | 1481 | |
53d2e124 | 1482 | /* F03:C438/C439. If the current symbol is of the same derived type that we're |
4ee9c684 | 1483 | constructing, it must have the pointer attribute. */ |
53d2e124 | 1484 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
eeebe20b | 1485 | && current_ts.u.derived == gfc_current_block () |
4ee9c684 | 1486 | && current_attr.pointer == 0) |
1487 | { | |
1488 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1489 | return FAILURE; | |
1490 | } | |
1491 | ||
1a9745d2 | 1492 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
4ee9c684 | 1493 | { |
1494 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1495 | { | |
1496 | gfc_error ("Array component of structure at %C must have explicit " | |
1497 | "or deferred shape"); | |
1498 | return FAILURE; | |
1499 | } | |
1500 | } | |
1501 | ||
1502 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1503 | return FAILURE; | |
1504 | ||
1505 | c->ts = current_ts; | |
eeebe20b | 1506 | if (c->ts.type == BT_CHARACTER) |
1507 | c->ts.u.cl = cl; | |
3be2b8d5 | 1508 | c->attr = current_attr; |
4ee9c684 | 1509 | |
1510 | c->initializer = *init; | |
1511 | *init = NULL; | |
1512 | ||
1513 | c->as = *as; | |
1514 | if (c->as != NULL) | |
3be2b8d5 | 1515 | c->attr.dimension = 1; |
4ee9c684 | 1516 | *as = NULL; |
1517 | ||
a2f51d5f | 1518 | /* Should this ever get more complicated, combine with similar section |
1519 | in add_init_expr_to_sym into a separate function. */ | |
eeebe20b | 1520 | if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.u.cl |
1521 | && c->ts.u.cl->length && c->ts.u.cl->length->expr_type == EXPR_CONSTANT) | |
a2f51d5f | 1522 | { |
d1a39099 | 1523 | int len; |
1524 | ||
eeebe20b | 1525 | gcc_assert (c->ts.u.cl && c->ts.u.cl->length); |
1526 | gcc_assert (c->ts.u.cl->length->expr_type == EXPR_CONSTANT); | |
1527 | gcc_assert (c->ts.u.cl->length->ts.type == BT_INTEGER); | |
d1a39099 | 1528 | |
eeebe20b | 1529 | len = mpz_get_si (c->ts.u.cl->length->value.integer); |
a2f51d5f | 1530 | |
1531 | if (c->initializer->expr_type == EXPR_CONSTANT) | |
d1a39099 | 1532 | gfc_set_constant_character_len (len, c->initializer, -1); |
eeebe20b | 1533 | else if (mpz_cmp (c->ts.u.cl->length->value.integer, |
1534 | c->initializer->ts.u.cl->length->value.integer)) | |
a2f51d5f | 1535 | { |
d1a39099 | 1536 | bool has_ts; |
a2f51d5f | 1537 | gfc_constructor *ctor = c->initializer->value.constructor; |
d1a39099 | 1538 | |
eeebe20b | 1539 | has_ts = (c->initializer->ts.u.cl |
1540 | && c->initializer->ts.u.cl->length_from_typespec); | |
d1a39099 | 1541 | |
6e4faf80 | 1542 | if (ctor) |
d1a39099 | 1543 | { |
6e4faf80 | 1544 | int first_len; |
1545 | ||
1546 | /* Remember the length of the first element for checking | |
1547 | that all elements *in the constructor* have the same | |
1548 | length. This need not be the length of the LHS! */ | |
1549 | gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT); | |
1550 | gcc_assert (ctor->expr->ts.type == BT_CHARACTER); | |
1551 | first_len = ctor->expr->value.character.length; | |
1552 | ||
1553 | for (; ctor; ctor = ctor->next) | |
d1a39099 | 1554 | { |
6e4faf80 | 1555 | if (ctor->expr->expr_type == EXPR_CONSTANT) |
1556 | gfc_set_constant_character_len (len, ctor->expr, | |
1557 | has_ts ? -1 : first_len); | |
d1a39099 | 1558 | } |
d1a39099 | 1559 | } |
a2f51d5f | 1560 | } |
1561 | } | |
1562 | ||
4ee9c684 | 1563 | /* Check array components. */ |
3be2b8d5 | 1564 | if (!c->attr.dimension) |
b3704193 | 1565 | goto scalar; |
4ee9c684 | 1566 | |
3be2b8d5 | 1567 | if (c->attr.pointer) |
4ee9c684 | 1568 | { |
1569 | if (c->as->type != AS_DEFERRED) | |
1570 | { | |
2294b616 | 1571 | gfc_error ("Pointer array component of structure at %C must have a " |
1572 | "deferred shape"); | |
b3704193 | 1573 | t = FAILURE; |
2294b616 | 1574 | } |
1575 | } | |
3be2b8d5 | 1576 | else if (c->attr.allocatable) |
2294b616 | 1577 | { |
1578 | if (c->as->type != AS_DEFERRED) | |
1579 | { | |
1580 | gfc_error ("Allocatable component of structure at %C must have a " | |
1581 | "deferred shape"); | |
b3704193 | 1582 | t = FAILURE; |
4ee9c684 | 1583 | } |
1584 | } | |
1585 | else | |
1586 | { | |
1587 | if (c->as->type != AS_EXPLICIT) | |
1588 | { | |
1a9745d2 | 1589 | gfc_error ("Array component of structure at %C must have an " |
1590 | "explicit shape"); | |
b3704193 | 1591 | t = FAILURE; |
4ee9c684 | 1592 | } |
1593 | } | |
1594 | ||
b3704193 | 1595 | scalar: |
1596 | if (c->ts.type == BT_CLASS) | |
1597 | encapsulate_class_symbol (&c->ts, &c->attr, &c->as); | |
1598 | ||
1599 | return t; | |
4ee9c684 | 1600 | } |
1601 | ||
1602 | ||
1603 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1604 | ||
1605 | match | |
1a9745d2 | 1606 | gfc_match_null (gfc_expr **result) |
4ee9c684 | 1607 | { |
1608 | gfc_symbol *sym; | |
1609 | gfc_expr *e; | |
1610 | match m; | |
1611 | ||
1612 | m = gfc_match (" null ( )"); | |
1613 | if (m != MATCH_YES) | |
1614 | return m; | |
1615 | ||
1616 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1617 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1618 | { | |
1619 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1620 | return MATCH_ERROR; | |
1621 | } | |
1622 | ||
1623 | gfc_intrinsic_symbol (sym); | |
1624 | ||
1625 | if (sym->attr.proc != PROC_INTRINSIC | |
950683ed | 1626 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1627 | sym->name, NULL) == FAILURE | |
1628 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
4ee9c684 | 1629 | return MATCH_ERROR; |
1630 | ||
1631 | e = gfc_get_expr (); | |
cbb9e6aa | 1632 | e->where = gfc_current_locus; |
4ee9c684 | 1633 | e->expr_type = EXPR_NULL; |
1634 | e->ts.type = BT_UNKNOWN; | |
1635 | ||
1636 | *result = e; | |
1637 | ||
1638 | return MATCH_YES; | |
1639 | } | |
1640 | ||
1641 | ||
4ee9c684 | 1642 | /* Match a variable name with an optional initializer. When this |
1643 | subroutine is called, a variable is expected to be parsed next. | |
1644 | Depending on what is happening at the moment, updates either the | |
1645 | symbol table or the current interface. */ | |
1646 | ||
1647 | static match | |
3923b69f | 1648 | variable_decl (int elem) |
4ee9c684 | 1649 | { |
1650 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1651 | gfc_expr *initializer, *char_len; | |
1652 | gfc_array_spec *as; | |
b549d2a5 | 1653 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
4ee9c684 | 1654 | gfc_charlen *cl; |
1655 | locus var_locus; | |
1656 | match m; | |
f6bb8f4b | 1657 | gfc_try t; |
b549d2a5 | 1658 | gfc_symbol *sym; |
4ee9c684 | 1659 | |
1660 | initializer = NULL; | |
1661 | as = NULL; | |
b549d2a5 | 1662 | cp_as = NULL; |
4ee9c684 | 1663 | |
1664 | /* When we get here, we've just matched a list of attributes and | |
1665 | maybe a type and a double colon. The next thing we expect to see | |
1666 | is the name of the symbol. */ | |
1667 | m = gfc_match_name (name); | |
1668 | if (m != MATCH_YES) | |
1669 | goto cleanup; | |
1670 | ||
cbb9e6aa | 1671 | var_locus = gfc_current_locus; |
4ee9c684 | 1672 | |
1673 | /* Now we could see the optional array spec. or character length. */ | |
1674 | m = gfc_match_array_spec (&as); | |
b549d2a5 | 1675 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1676 | cp_as = gfc_copy_array_spec (as); | |
1677 | else if (m == MATCH_ERROR) | |
4ee9c684 | 1678 | goto cleanup; |
3b6a4b41 | 1679 | |
4ee9c684 | 1680 | if (m == MATCH_NO) |
1681 | as = gfc_copy_array_spec (current_as); | |
1682 | ||
1683 | char_len = NULL; | |
1684 | cl = NULL; | |
1685 | ||
1686 | if (current_ts.type == BT_CHARACTER) | |
1687 | { | |
1688 | switch (match_char_length (&char_len)) | |
1689 | { | |
1690 | case MATCH_YES: | |
d270ce52 | 1691 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
4ee9c684 | 1692 | |
1693 | cl->length = char_len; | |
1694 | break; | |
1695 | ||
3923b69f | 1696 | /* Non-constant lengths need to be copied after the first |
04b61f60 | 1697 | element. Also copy assumed lengths. */ |
4ee9c684 | 1698 | case MATCH_NO: |
04b61f60 | 1699 | if (elem > 1 |
eeebe20b | 1700 | && (current_ts.u.cl->length == NULL |
1701 | || current_ts.u.cl->length->expr_type != EXPR_CONSTANT)) | |
3923b69f | 1702 | { |
d270ce52 | 1703 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
eeebe20b | 1704 | cl->length = gfc_copy_expr (current_ts.u.cl->length); |
3923b69f | 1705 | } |
1706 | else | |
eeebe20b | 1707 | cl = current_ts.u.cl; |
3923b69f | 1708 | |
4ee9c684 | 1709 | break; |
1710 | ||
1711 | case MATCH_ERROR: | |
1712 | goto cleanup; | |
1713 | } | |
1714 | } | |
1715 | ||
b549d2a5 | 1716 | /* If this symbol has already shown up in a Cray Pointer declaration, |
f6d0e37a | 1717 | then we want to set the type & bail out. */ |
b549d2a5 | 1718 | if (gfc_option.flag_cray_pointer) |
1719 | { | |
1720 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1721 | if (sym != NULL && sym->attr.cray_pointee) | |
1722 | { | |
1723 | sym->ts.type = current_ts.type; | |
1724 | sym->ts.kind = current_ts.kind; | |
eeebe20b | 1725 | sym->ts.u.cl = cl; |
1726 | sym->ts.u.derived = current_ts.u.derived; | |
c5d33754 | 1727 | sym->ts.is_c_interop = current_ts.is_c_interop; |
1728 | sym->ts.is_iso_c = current_ts.is_iso_c; | |
b549d2a5 | 1729 | m = MATCH_YES; |
1730 | ||
1731 | /* Check to see if we have an array specification. */ | |
1732 | if (cp_as != NULL) | |
1733 | { | |
1734 | if (sym->as != NULL) | |
1735 | { | |
7698a624 | 1736 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 1737 | gfc_free_array_spec (cp_as); |
1738 | m = MATCH_ERROR; | |
1739 | goto cleanup; | |
1740 | } | |
1741 | else | |
1742 | { | |
1743 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1744 | gfc_internal_error ("Couldn't set pointee array spec."); | |
e14bee04 | 1745 | |
b549d2a5 | 1746 | /* Fix the array spec. */ |
e14bee04 | 1747 | m = gfc_mod_pointee_as (sym->as); |
b549d2a5 | 1748 | if (m == MATCH_ERROR) |
1749 | goto cleanup; | |
1750 | } | |
e14bee04 | 1751 | } |
b549d2a5 | 1752 | goto cleanup; |
1753 | } | |
1754 | else | |
1755 | { | |
1756 | gfc_free_array_spec (cp_as); | |
1757 | } | |
1758 | } | |
e14bee04 | 1759 | |
1e057e9b | 1760 | /* Procedure pointer as function result. */ |
1761 | if (gfc_current_state () == COMP_FUNCTION | |
1762 | && strcmp ("ppr@", gfc_current_block ()->name) == 0 | |
1763 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0) | |
1764 | strcpy (name, "ppr@"); | |
1765 | ||
1766 | if (gfc_current_state () == COMP_FUNCTION | |
1767 | && strcmp (name, gfc_current_block ()->name) == 0 | |
1768 | && gfc_current_block ()->result | |
1769 | && strcmp ("ppr@", gfc_current_block ()->result->name) == 0) | |
1770 | strcpy (name, "ppr@"); | |
e14bee04 | 1771 | |
4ee9c684 | 1772 | /* OK, we've successfully matched the declaration. Now put the |
1773 | symbol in the current namespace, because it might be used in the | |
fe06c0d5 | 1774 | optional initialization expression for this symbol, e.g. this is |
4ee9c684 | 1775 | perfectly legal: |
1776 | ||
1777 | integer, parameter :: i = huge(i) | |
1778 | ||
1779 | This is only true for parameters or variables of a basic type. | |
1780 | For components of derived types, it is not true, so we don't | |
1781 | create a symbol for those yet. If we fail to create the symbol, | |
1782 | bail out. */ | |
1783 | if (gfc_current_state () != COMP_DERIVED | |
1784 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1785 | { | |
b8a51d79 | 1786 | m = MATCH_ERROR; |
1787 | goto cleanup; | |
1788 | } | |
1789 | ||
60fbbf9e | 1790 | /* An interface body specifies all of the procedure's |
1791 | characteristics and these shall be consistent with those | |
1792 | specified in the procedure definition, except that the interface | |
1793 | may specify a procedure that is not pure if the procedure is | |
1794 | defined to be pure(12.3.2). */ | |
b8a51d79 | 1795 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1796 | && gfc_current_ns->proc_name |
1797 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
eeebe20b | 1798 | && current_ts.u.derived->ns != gfc_current_ns) |
c723595c | 1799 | { |
1800 | gfc_symtree *st; | |
eeebe20b | 1801 | st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.u.derived->name); |
1802 | if (!(current_ts.u.derived->attr.imported | |
c723595c | 1803 | && st != NULL |
eeebe20b | 1804 | && st->n.sym == current_ts.u.derived) |
c723595c | 1805 | && !gfc_current_ns->has_import_set) |
1806 | { | |
1807 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1808 | "interface", name); | |
1809 | m = MATCH_ERROR; | |
1810 | goto cleanup; | |
1811 | } | |
4ee9c684 | 1812 | } |
1813 | ||
1814 | /* In functions that have a RESULT variable defined, the function | |
1815 | name always refers to function calls. Therefore, the name is | |
1816 | not allowed to appear in specification statements. */ | |
1817 | if (gfc_current_state () == COMP_FUNCTION | |
1818 | && gfc_current_block () != NULL | |
1819 | && gfc_current_block ()->result != NULL | |
1820 | && gfc_current_block ()->result != gfc_current_block () | |
1821 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1822 | { | |
1823 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1824 | m = MATCH_ERROR; | |
1825 | goto cleanup; | |
1826 | } | |
1827 | ||
b4f45d02 | 1828 | /* We allow old-style initializations of the form |
1829 | integer i /2/, j(4) /3*3, 1/ | |
1830 | (if no colon has been seen). These are different from data | |
1831 | statements in that initializers are only allowed to apply to the | |
1832 | variable immediately preceding, i.e. | |
1833 | integer i, j /1, 2/ | |
1834 | is not allowed. Therefore we have to do some work manually, that | |
cca3db55 | 1835 | could otherwise be left to the matchers for DATA statements. */ |
b4f45d02 | 1836 | |
1837 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1838 | { | |
1839 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1840 | "initialization at %C") == FAILURE) | |
1841 | return MATCH_ERROR; | |
e14bee04 | 1842 | |
b4f45d02 | 1843 | return match_old_style_init (name); |
1844 | } | |
1845 | ||
4ee9c684 | 1846 | /* The double colon must be present in order to have initializers. |
1847 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1848 | if (colon_seen) | |
1849 | { | |
1850 | if (gfc_match (" =>") == MATCH_YES) | |
1851 | { | |
4ee9c684 | 1852 | if (!current_attr.pointer) |
1853 | { | |
1854 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1855 | m = MATCH_ERROR; | |
1856 | goto cleanup; | |
1857 | } | |
1858 | ||
1859 | m = gfc_match_null (&initializer); | |
1860 | if (m == MATCH_NO) | |
1861 | { | |
e4789c62 | 1862 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
4ee9c684 | 1863 | m = MATCH_ERROR; |
1864 | } | |
1865 | ||
0407b7df | 1866 | if (gfc_pure (NULL) && gfc_state_stack->state != COMP_DERIVED) |
4ee9c684 | 1867 | { |
1a9745d2 | 1868 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1869 | "a PURE procedure"); | |
4ee9c684 | 1870 | m = MATCH_ERROR; |
1871 | } | |
1872 | ||
1873 | if (m != MATCH_YES) | |
1874 | goto cleanup; | |
1875 | ||
4ee9c684 | 1876 | } |
1877 | else if (gfc_match_char ('=') == MATCH_YES) | |
1878 | { | |
1879 | if (current_attr.pointer) | |
1880 | { | |
1a9745d2 | 1881 | gfc_error ("Pointer initialization at %C requires '=>', " |
1882 | "not '='"); | |
4ee9c684 | 1883 | m = MATCH_ERROR; |
1884 | goto cleanup; | |
1885 | } | |
1886 | ||
1887 | m = gfc_match_init_expr (&initializer); | |
1888 | if (m == MATCH_NO) | |
1889 | { | |
1890 | gfc_error ("Expected an initialization expression at %C"); | |
1891 | m = MATCH_ERROR; | |
1892 | } | |
1893 | ||
1894 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1895 | { | |
1a9745d2 | 1896 | gfc_error ("Initialization of variable at %C is not allowed in " |
1897 | "a PURE procedure"); | |
4ee9c684 | 1898 | m = MATCH_ERROR; |
1899 | } | |
1900 | ||
1901 | if (m != MATCH_YES) | |
1902 | goto cleanup; | |
1903 | } | |
8ffad0f9 | 1904 | } |
1905 | ||
2294b616 | 1906 | if (initializer != NULL && current_attr.allocatable |
1907 | && gfc_current_state () == COMP_DERIVED) | |
1908 | { | |
1a9745d2 | 1909 | gfc_error ("Initialization of allocatable component at %C is not " |
1910 | "allowed"); | |
2294b616 | 1911 | m = MATCH_ERROR; |
1912 | goto cleanup; | |
1913 | } | |
1914 | ||
d9b3f26b | 1915 | /* Add the initializer. Note that it is fine if initializer is |
4ee9c684 | 1916 | NULL here, because we sometimes also need to check if a |
1917 | declaration *must* have an initialization expression. */ | |
1918 | if (gfc_current_state () != COMP_DERIVED) | |
1919 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1920 | else | |
d9b3f26b | 1921 | { |
2294b616 | 1922 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1923 | && !current_attr.pointer && !initializer) |
d9b3f26b | 1924 | initializer = gfc_default_initializer (¤t_ts); |
1925 | t = build_struct (name, cl, &initializer, &as); | |
1926 | } | |
4ee9c684 | 1927 | |
1928 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1929 | ||
1930 | cleanup: | |
1931 | /* Free stuff up and return. */ | |
1932 | gfc_free_expr (initializer); | |
1933 | gfc_free_array_spec (as); | |
1934 | ||
1935 | return m; | |
1936 | } | |
1937 | ||
1938 | ||
d10f89ee | 1939 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
1940 | This assumes that the byte size is equal to the kind number for | |
1941 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
4ee9c684 | 1942 | |
1943 | match | |
1a9745d2 | 1944 | gfc_match_old_kind_spec (gfc_typespec *ts) |
4ee9c684 | 1945 | { |
1946 | match m; | |
3bd3b616 | 1947 | int original_kind; |
4ee9c684 | 1948 | |
1949 | if (gfc_match_char ('*') != MATCH_YES) | |
1950 | return MATCH_NO; | |
1951 | ||
3bd3b616 | 1952 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
4ee9c684 | 1953 | if (m != MATCH_YES) |
1954 | return MATCH_ERROR; | |
1955 | ||
b118a35b | 1956 | original_kind = ts->kind; |
1957 | ||
4ee9c684 | 1958 | /* Massage the kind numbers for complex types. */ |
b118a35b | 1959 | if (ts->type == BT_COMPLEX) |
1960 | { | |
1961 | if (ts->kind % 2) | |
1a9745d2 | 1962 | { |
1963 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1964 | gfc_basic_typename (ts->type), original_kind); | |
1965 | return MATCH_ERROR; | |
1966 | } | |
b118a35b | 1967 | ts->kind /= 2; |
1968 | } | |
4ee9c684 | 1969 | |
f2d4ef3b | 1970 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1971 | { |
b118a35b | 1972 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
1a9745d2 | 1973 | gfc_basic_typename (ts->type), original_kind); |
4ee9c684 | 1974 | return MATCH_ERROR; |
1975 | } | |
1976 | ||
be7f01a1 | 1977 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
1978 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1979 | return MATCH_ERROR; | |
1980 | ||
4ee9c684 | 1981 | return MATCH_YES; |
1982 | } | |
1983 | ||
1984 | ||
1985 | /* Match a kind specification. Since kinds are generally optional, we | |
1986 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1987 | string is found, then we know we have an error. */ | |
1988 | ||
1989 | match | |
67a51c8e | 1990 | gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only) |
4ee9c684 | 1991 | { |
67a51c8e | 1992 | locus where, loc; |
4ee9c684 | 1993 | gfc_expr *e; |
1994 | match m, n; | |
c632ff3d | 1995 | char c; |
4ee9c684 | 1996 | const char *msg; |
1997 | ||
1998 | m = MATCH_NO; | |
67a51c8e | 1999 | n = MATCH_YES; |
4ee9c684 | 2000 | e = NULL; |
2001 | ||
67a51c8e | 2002 | where = loc = gfc_current_locus; |
2003 | ||
2004 | if (kind_expr_only) | |
2005 | goto kind_expr; | |
4ee9c684 | 2006 | |
2007 | if (gfc_match_char ('(') == MATCH_NO) | |
2008 | return MATCH_NO; | |
2009 | ||
2010 | /* Also gobbles optional text. */ | |
2011 | if (gfc_match (" kind = ") == MATCH_YES) | |
2012 | m = MATCH_ERROR; | |
2013 | ||
67a51c8e | 2014 | loc = gfc_current_locus; |
2015 | ||
2016 | kind_expr: | |
4ee9c684 | 2017 | n = gfc_match_init_expr (&e); |
67a51c8e | 2018 | |
4ee9c684 | 2019 | if (n != MATCH_YES) |
67a51c8e | 2020 | { |
077932f9 | 2021 | if (gfc_matching_function) |
67a51c8e | 2022 | { |
077932f9 | 2023 | /* The function kind expression might include use associated or |
2024 | imported parameters and try again after the specification | |
2025 | expressions..... */ | |
67a51c8e | 2026 | if (gfc_match_char (')') != MATCH_YES) |
2027 | { | |
2028 | gfc_error ("Missing right parenthesis at %C"); | |
2029 | m = MATCH_ERROR; | |
2030 | goto no_match; | |
2031 | } | |
2032 | ||
2033 | gfc_free_expr (e); | |
67a51c8e | 2034 | gfc_undo_symbols (); |
2035 | return MATCH_YES; | |
2036 | } | |
2037 | else | |
2038 | { | |
2039 | /* ....or else, the match is real. */ | |
2040 | if (n == MATCH_NO) | |
2041 | gfc_error ("Expected initialization expression at %C"); | |
2042 | if (n != MATCH_YES) | |
2043 | return MATCH_ERROR; | |
2044 | } | |
2045 | } | |
4ee9c684 | 2046 | |
2047 | if (e->rank != 0) | |
2048 | { | |
2049 | gfc_error ("Expected scalar initialization expression at %C"); | |
2050 | m = MATCH_ERROR; | |
2051 | goto no_match; | |
2052 | } | |
2053 | ||
2054 | msg = gfc_extract_int (e, &ts->kind); | |
077932f9 | 2055 | |
4ee9c684 | 2056 | if (msg != NULL) |
2057 | { | |
2058 | gfc_error (msg); | |
2059 | m = MATCH_ERROR; | |
2060 | goto no_match; | |
2061 | } | |
2062 | ||
c5d33754 | 2063 | /* Before throwing away the expression, let's see if we had a |
2064 | C interoperable kind (and store the fact). */ | |
2065 | if (e->ts.is_c_interop == 1) | |
2066 | { | |
2067 | /* Mark this as c interoperable if being declared with one | |
2068 | of the named constants from iso_c_binding. */ | |
2069 | ts->is_c_interop = e->ts.is_iso_c; | |
2070 | ts->f90_type = e->ts.f90_type; | |
2071 | } | |
2072 | ||
4ee9c684 | 2073 | gfc_free_expr (e); |
2074 | e = NULL; | |
2075 | ||
c5d33754 | 2076 | /* Ignore errors to this point, if we've gotten here. This means |
2077 | we ignore the m=MATCH_ERROR from above. */ | |
f2d4ef3b | 2078 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 2079 | { |
2080 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
2081 | gfc_basic_typename (ts->type)); | |
c632ff3d | 2082 | gfc_current_locus = where; |
2083 | return MATCH_ERROR; | |
4ee9c684 | 2084 | } |
c632ff3d | 2085 | |
209d3778 | 2086 | /* Warn if, e.g., c_int is used for a REAL variable, but not |
2087 | if, e.g., c_double is used for COMPLEX as the standard | |
2088 | explicitly says that the kind type parameter for complex and real | |
2089 | variable is the same, i.e. c_float == c_float_complex. */ | |
2090 | if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type | |
2091 | && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX) | |
2092 | || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL))) | |
ded233a6 | 2093 | gfc_warning_now ("C kind type parameter is for type %s but type at %L " |
2094 | "is %s", gfc_basic_typename (ts->f90_type), &where, | |
2095 | gfc_basic_typename (ts->type)); | |
209d3778 | 2096 | |
c632ff3d | 2097 | gfc_gobble_whitespace (); |
e0be6f02 | 2098 | if ((c = gfc_next_ascii_char ()) != ')' |
2099 | && (ts->type != BT_CHARACTER || c != ',')) | |
4ee9c684 | 2100 | { |
c632ff3d | 2101 | if (ts->type == BT_CHARACTER) |
2102 | gfc_error ("Missing right parenthesis or comma at %C"); | |
2103 | else | |
2104 | gfc_error ("Missing right parenthesis at %C"); | |
67a51c8e | 2105 | m = MATCH_ERROR; |
4ee9c684 | 2106 | } |
c5d33754 | 2107 | else |
2108 | /* All tests passed. */ | |
2109 | m = MATCH_YES; | |
4ee9c684 | 2110 | |
c5d33754 | 2111 | if(m == MATCH_ERROR) |
2112 | gfc_current_locus = where; | |
2113 | ||
2114 | /* Return what we know from the test(s). */ | |
2115 | return m; | |
4ee9c684 | 2116 | |
2117 | no_match: | |
2118 | gfc_free_expr (e); | |
cbb9e6aa | 2119 | gfc_current_locus = where; |
4ee9c684 | 2120 | return m; |
2121 | } | |
2122 | ||
2123 | ||
33399208 | 2124 | static match |
2125 | match_char_kind (int * kind, int * is_iso_c) | |
2126 | { | |
2127 | locus where; | |
2128 | gfc_expr *e; | |
2129 | match m, n; | |
2130 | const char *msg; | |
2131 | ||
2132 | m = MATCH_NO; | |
2133 | e = NULL; | |
2134 | where = gfc_current_locus; | |
2135 | ||
2136 | n = gfc_match_init_expr (&e); | |
c632ff3d | 2137 | |
077932f9 | 2138 | if (n != MATCH_YES && gfc_matching_function) |
c632ff3d | 2139 | { |
077932f9 | 2140 | /* The expression might include use-associated or imported |
2141 | parameters and try again after the specification | |
2142 | expressions. */ | |
c632ff3d | 2143 | gfc_free_expr (e); |
c632ff3d | 2144 | gfc_undo_symbols (); |
2145 | return MATCH_YES; | |
2146 | } | |
2147 | ||
33399208 | 2148 | if (n == MATCH_NO) |
2149 | gfc_error ("Expected initialization expression at %C"); | |
2150 | if (n != MATCH_YES) | |
2151 | return MATCH_ERROR; | |
2152 | ||
2153 | if (e->rank != 0) | |
2154 | { | |
2155 | gfc_error ("Expected scalar initialization expression at %C"); | |
2156 | m = MATCH_ERROR; | |
2157 | goto no_match; | |
2158 | } | |
2159 | ||
2160 | msg = gfc_extract_int (e, kind); | |
2161 | *is_iso_c = e->ts.is_iso_c; | |
2162 | if (msg != NULL) | |
2163 | { | |
2164 | gfc_error (msg); | |
2165 | m = MATCH_ERROR; | |
2166 | goto no_match; | |
2167 | } | |
2168 | ||
2169 | gfc_free_expr (e); | |
2170 | ||
2171 | /* Ignore errors to this point, if we've gotten here. This means | |
2172 | we ignore the m=MATCH_ERROR from above. */ | |
2173 | if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0) | |
2174 | { | |
2175 | gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind); | |
2176 | m = MATCH_ERROR; | |
2177 | } | |
2178 | else | |
2179 | /* All tests passed. */ | |
2180 | m = MATCH_YES; | |
2181 | ||
2182 | if (m == MATCH_ERROR) | |
2183 | gfc_current_locus = where; | |
2184 | ||
2185 | /* Return what we know from the test(s). */ | |
2186 | return m; | |
2187 | ||
2188 | no_match: | |
2189 | gfc_free_expr (e); | |
2190 | gfc_current_locus = where; | |
2191 | return m; | |
2192 | } | |
2193 | ||
10f5dcc0 | 2194 | |
4ee9c684 | 2195 | /* Match the various kind/length specifications in a CHARACTER |
2196 | declaration. We don't return MATCH_NO. */ | |
2197 | ||
10f5dcc0 | 2198 | match |
2199 | gfc_match_char_spec (gfc_typespec *ts) | |
4ee9c684 | 2200 | { |
33399208 | 2201 | int kind, seen_length, is_iso_c; |
4ee9c684 | 2202 | gfc_charlen *cl; |
2203 | gfc_expr *len; | |
2204 | match m; | |
33399208 | 2205 | |
4ee9c684 | 2206 | len = NULL; |
2207 | seen_length = 0; | |
33399208 | 2208 | kind = 0; |
2209 | is_iso_c = 0; | |
4ee9c684 | 2210 | |
2211 | /* Try the old-style specification first. */ | |
2212 | old_char_selector = 0; | |
2213 | ||
2214 | m = match_char_length (&len); | |
2215 | if (m != MATCH_NO) | |
2216 | { | |
2217 | if (m == MATCH_YES) | |
2218 | old_char_selector = 1; | |
2219 | seen_length = 1; | |
2220 | goto done; | |
2221 | } | |
2222 | ||
2223 | m = gfc_match_char ('('); | |
2224 | if (m != MATCH_YES) | |
2225 | { | |
c5d33754 | 2226 | m = MATCH_YES; /* Character without length is a single char. */ |
4ee9c684 | 2227 | goto done; |
2228 | } | |
2229 | ||
c5d33754 | 2230 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ |
4ee9c684 | 2231 | if (gfc_match (" kind =") == MATCH_YES) |
2232 | { | |
33399208 | 2233 | m = match_char_kind (&kind, &is_iso_c); |
c5d33754 | 2234 | |
4ee9c684 | 2235 | if (m == MATCH_ERROR) |
2236 | goto done; | |
2237 | if (m == MATCH_NO) | |
2238 | goto syntax; | |
2239 | ||
2240 | if (gfc_match (" , len =") == MATCH_NO) | |
2241 | goto rparen; | |
2242 | ||
2243 | m = char_len_param_value (&len); | |
2244 | if (m == MATCH_NO) | |
2245 | goto syntax; | |
2246 | if (m == MATCH_ERROR) | |
2247 | goto done; | |
2248 | seen_length = 1; | |
2249 | ||
2250 | goto rparen; | |
2251 | } | |
2252 | ||
f6d0e37a | 2253 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ |
4ee9c684 | 2254 | if (gfc_match (" len =") == MATCH_YES) |
2255 | { | |
2256 | m = char_len_param_value (&len); | |
2257 | if (m == MATCH_NO) | |
2258 | goto syntax; | |
2259 | if (m == MATCH_ERROR) | |
2260 | goto done; | |
2261 | seen_length = 1; | |
2262 | ||
2263 | if (gfc_match_char (')') == MATCH_YES) | |
2264 | goto done; | |
2265 | ||
2266 | if (gfc_match (" , kind =") != MATCH_YES) | |
2267 | goto syntax; | |
2268 | ||
33399208 | 2269 | if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR) |
2270 | goto done; | |
4ee9c684 | 2271 | |
2272 | goto rparen; | |
2273 | } | |
2274 | ||
f6d0e37a | 2275 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
4ee9c684 | 2276 | m = char_len_param_value (&len); |
2277 | if (m == MATCH_NO) | |
2278 | goto syntax; | |
2279 | if (m == MATCH_ERROR) | |
2280 | goto done; | |
2281 | seen_length = 1; | |
2282 | ||
2283 | m = gfc_match_char (')'); | |
2284 | if (m == MATCH_YES) | |
2285 | goto done; | |
2286 | ||
2287 | if (gfc_match_char (',') != MATCH_YES) | |
2288 | goto syntax; | |
2289 | ||
c5d33754 | 2290 | gfc_match (" kind ="); /* Gobble optional text. */ |
4ee9c684 | 2291 | |
33399208 | 2292 | m = match_char_kind (&kind, &is_iso_c); |
4ee9c684 | 2293 | if (m == MATCH_ERROR) |
2294 | goto done; | |
2295 | if (m == MATCH_NO) | |
2296 | goto syntax; | |
2297 | ||
2298 | rparen: | |
2299 | /* Require a right-paren at this point. */ | |
2300 | m = gfc_match_char (')'); | |
2301 | if (m == MATCH_YES) | |
2302 | goto done; | |
2303 | ||
2304 | syntax: | |
2305 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
2306 | m = MATCH_ERROR; | |
a3cbe8cc | 2307 | gfc_free_expr (len); |
2308 | return m; | |
4ee9c684 | 2309 | |
2310 | done: | |
8d39570e | 2311 | /* Deal with character functions after USE and IMPORT statements. */ |
2312 | if (gfc_matching_function) | |
077932f9 | 2313 | { |
8d39570e | 2314 | gfc_free_expr (len); |
077932f9 | 2315 | gfc_undo_symbols (); |
2316 | return MATCH_YES; | |
2317 | } | |
2318 | ||
4ee9c684 | 2319 | if (m != MATCH_YES) |
2320 | { | |
2321 | gfc_free_expr (len); | |
2322 | return m; | |
2323 | } | |
2324 | ||
2325 | /* Do some final massaging of the length values. */ | |
d270ce52 | 2326 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
4ee9c684 | 2327 | |
2328 | if (seen_length == 0) | |
2329 | cl->length = gfc_int_expr (1); | |
2330 | else | |
2fe2caa6 | 2331 | cl->length = len; |
4ee9c684 | 2332 | |
eeebe20b | 2333 | ts->u.cl = cl; |
33399208 | 2334 | ts->kind = kind == 0 ? gfc_default_character_kind : kind; |
4ee9c684 | 2335 | |
c5d33754 | 2336 | /* We have to know if it was a c interoperable kind so we can |
2337 | do accurate type checking of bind(c) procs, etc. */ | |
33399208 | 2338 | if (kind != 0) |
2339 | /* Mark this as c interoperable if being declared with one | |
2340 | of the named constants from iso_c_binding. */ | |
2341 | ts->is_c_interop = is_iso_c; | |
c5d33754 | 2342 | else if (len != NULL) |
33399208 | 2343 | /* Here, we might have parsed something such as: character(c_char) |
2344 | In this case, the parsing code above grabs the c_char when | |
2345 | looking for the length (line 1690, roughly). it's the last | |
2346 | testcase for parsing the kind params of a character variable. | |
2347 | However, it's not actually the length. this seems like it | |
2348 | could be an error. | |
2349 | To see if the user used a C interop kind, test the expr | |
2350 | of the so called length, and see if it's C interoperable. */ | |
2351 | ts->is_c_interop = len->ts.is_iso_c; | |
c5d33754 | 2352 | |
4ee9c684 | 2353 | return MATCH_YES; |
2354 | } | |
2355 | ||
2356 | ||
e8152f13 | 2357 | /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts |
2358 | structure to the matched specification. This is necessary for FUNCTION and | |
4ee9c684 | 2359 | IMPLICIT statements. |
2360 | ||
e14bee04 | 2361 | If implicit_flag is nonzero, then we don't check for the optional |
39351103 | 2362 | kind specification. Not doing so is needed for matching an IMPLICIT |
4ee9c684 | 2363 | statement correctly. */ |
2364 | ||
67a51c8e | 2365 | match |
e8152f13 | 2366 | gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag) |
4ee9c684 | 2367 | { |
2368 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2369 | gfc_symbol *sym; | |
2370 | match m; | |
e0be6f02 | 2371 | char c; |
077932f9 | 2372 | bool seen_deferred_kind; |
4ee9c684 | 2373 | |
077932f9 | 2374 | /* A belt and braces check that the typespec is correctly being treated |
2375 | as a deferred characteristic association. */ | |
2376 | seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION) | |
8d39570e | 2377 | && (gfc_current_block ()->result->ts.kind == -1) |
2378 | && (ts->kind == -1); | |
4ee9c684 | 2379 | gfc_clear_ts (ts); |
077932f9 | 2380 | if (seen_deferred_kind) |
2381 | ts->kind = -1; | |
4ee9c684 | 2382 | |
c5d33754 | 2383 | /* Clear the current binding label, in case one is given. */ |
2384 | curr_binding_label[0] = '\0'; | |
2385 | ||
25b29122 | 2386 | if (gfc_match (" byte") == MATCH_YES) |
2387 | { | |
2c89e2a0 | 2388 | if (gfc_notify_std (GFC_STD_GNU, "Extension: BYTE type at %C") |
25b29122 | 2389 | == FAILURE) |
2390 | return MATCH_ERROR; | |
2391 | ||
2392 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
2393 | { | |
2394 | gfc_error ("BYTE type used at %C " | |
2395 | "is not available on the target machine"); | |
2396 | return MATCH_ERROR; | |
2397 | } | |
e14bee04 | 2398 | |
25b29122 | 2399 | ts->type = BT_INTEGER; |
2400 | ts->kind = 1; | |
2401 | return MATCH_YES; | |
2402 | } | |
2403 | ||
4ee9c684 | 2404 | if (gfc_match (" integer") == MATCH_YES) |
2405 | { | |
2406 | ts->type = BT_INTEGER; | |
b8a891cb | 2407 | ts->kind = gfc_default_integer_kind; |
4ee9c684 | 2408 | goto get_kind; |
2409 | } | |
2410 | ||
2411 | if (gfc_match (" character") == MATCH_YES) | |
2412 | { | |
2413 | ts->type = BT_CHARACTER; | |
39351103 | 2414 | if (implicit_flag == 0) |
10f5dcc0 | 2415 | return gfc_match_char_spec (ts); |
39351103 | 2416 | else |
2417 | return MATCH_YES; | |
4ee9c684 | 2418 | } |
2419 | ||
2420 | if (gfc_match (" real") == MATCH_YES) | |
2421 | { | |
2422 | ts->type = BT_REAL; | |
b8a891cb | 2423 | ts->kind = gfc_default_real_kind; |
4ee9c684 | 2424 | goto get_kind; |
2425 | } | |
2426 | ||
2427 | if (gfc_match (" double precision") == MATCH_YES) | |
2428 | { | |
2429 | ts->type = BT_REAL; | |
b8a891cb | 2430 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2431 | return MATCH_YES; |
2432 | } | |
2433 | ||
2434 | if (gfc_match (" complex") == MATCH_YES) | |
2435 | { | |
2436 | ts->type = BT_COMPLEX; | |
b8a891cb | 2437 | ts->kind = gfc_default_complex_kind; |
4ee9c684 | 2438 | goto get_kind; |
2439 | } | |
2440 | ||
2441 | if (gfc_match (" double complex") == MATCH_YES) | |
2442 | { | |
be7f01a1 | 2443 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
2444 | "conform to the Fortran 95 standard") == FAILURE) | |
2445 | return MATCH_ERROR; | |
2446 | ||
4ee9c684 | 2447 | ts->type = BT_COMPLEX; |
b8a891cb | 2448 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2449 | return MATCH_YES; |
2450 | } | |
2451 | ||
2452 | if (gfc_match (" logical") == MATCH_YES) | |
2453 | { | |
2454 | ts->type = BT_LOGICAL; | |
b8a891cb | 2455 | ts->kind = gfc_default_logical_kind; |
4ee9c684 | 2456 | goto get_kind; |
2457 | } | |
2458 | ||
2459 | m = gfc_match (" type ( %n )", name); | |
1de1b1a9 | 2460 | if (m == MATCH_YES) |
2461 | ts->type = BT_DERIVED; | |
2462 | else | |
8ca7f89c | 2463 | { |
2464 | m = gfc_match (" class ( %n )", name); | |
2465 | if (m != MATCH_YES) | |
2466 | return m; | |
1de1b1a9 | 2467 | ts->type = BT_CLASS; |
8ca7f89c | 2468 | |
e8152f13 | 2469 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: CLASS statement at %C") |
2470 | == FAILURE) | |
2471 | return MATCH_ERROR; | |
8ca7f89c | 2472 | } |
4ee9c684 | 2473 | |
077932f9 | 2474 | /* Defer association of the derived type until the end of the |
2475 | specification block. However, if the derived type can be | |
2476 | found, add it to the typespec. */ | |
2477 | if (gfc_matching_function) | |
67a51c8e | 2478 | { |
eeebe20b | 2479 | ts->u.derived = NULL; |
077932f9 | 2480 | if (gfc_current_state () != COMP_INTERFACE |
2481 | && !gfc_find_symbol (name, NULL, 1, &sym) && sym) | |
eeebe20b | 2482 | ts->u.derived = sym; |
67a51c8e | 2483 | return MATCH_YES; |
2484 | } | |
2485 | ||
2486 | /* Search for the name but allow the components to be defined later. If | |
2487 | type = -1, this typespec has been seen in a function declaration but | |
077932f9 | 2488 | the type could not be accessed at that point. */ |
2489 | sym = NULL; | |
67a51c8e | 2490 | if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym)) |
4ee9c684 | 2491 | { |
2492 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2493 | return MATCH_ERROR; | |
2494 | } | |
67a51c8e | 2495 | else if (ts->kind == -1) |
2496 | { | |
077932f9 | 2497 | int iface = gfc_state_stack->previous->state != COMP_INTERFACE |
2498 | || gfc_current_ns->has_import_set; | |
2499 | if (gfc_find_symbol (name, NULL, iface, &sym)) | |
67a51c8e | 2500 | { |
2501 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2502 | return MATCH_ERROR; | |
2503 | } | |
2504 | ||
077932f9 | 2505 | ts->kind = 0; |
67a51c8e | 2506 | if (sym == NULL) |
2507 | return MATCH_NO; | |
2508 | } | |
4ee9c684 | 2509 | |
2510 | if (sym->attr.flavor != FL_DERIVED | |
950683ed | 2511 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 2512 | return MATCH_ERROR; |
2513 | ||
077932f9 | 2514 | gfc_set_sym_referenced (sym); |
eeebe20b | 2515 | ts->u.derived = sym; |
4ee9c684 | 2516 | |
2517 | return MATCH_YES; | |
2518 | ||
2519 | get_kind: | |
2520 | /* For all types except double, derived and character, look for an | |
2521 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
39351103 | 2522 | if (implicit_flag == 1) |
4ee9c684 | 2523 | return MATCH_YES; |
2524 | ||
18f3698a | 2525 | if (gfc_current_form == FORM_FREE) |
2526 | { | |
2c89e2a0 | 2527 | c = gfc_peek_ascii_char (); |
2528 | if (!gfc_is_whitespace (c) && c != '*' && c != '(' | |
1a9745d2 | 2529 | && c != ':' && c != ',') |
18f3698a | 2530 | return MATCH_NO; |
2531 | } | |
2532 | ||
67a51c8e | 2533 | m = gfc_match_kind_spec (ts, false); |
4ee9c684 | 2534 | if (m == MATCH_NO && ts->type != BT_CHARACTER) |
2535 | m = gfc_match_old_kind_spec (ts); | |
2536 | ||
077932f9 | 2537 | /* Defer association of the KIND expression of function results |
2538 | until after USE and IMPORT statements. */ | |
2539 | if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ()) | |
2540 | || gfc_matching_function) | |
2541 | return MATCH_YES; | |
2542 | ||
4ee9c684 | 2543 | if (m == MATCH_NO) |
2544 | m = MATCH_YES; /* No kind specifier found. */ | |
2545 | ||
2546 | return m; | |
2547 | } | |
2548 | ||
2549 | ||
39351103 | 2550 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
2551 | already matched in parse.c, or we would not end up here in the | |
2552 | first place. So the only thing we need to check, is if there is | |
2553 | trailing garbage. If not, the match is successful. */ | |
2554 | ||
2555 | match | |
2556 | gfc_match_implicit_none (void) | |
2557 | { | |
39351103 | 2558 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
2559 | } | |
2560 | ||
2561 | ||
2562 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
2563 | ||
2564 | static match | |
b70528c7 | 2565 | match_implicit_range (void) |
39351103 | 2566 | { |
e0be6f02 | 2567 | char c, c1, c2; |
2568 | int inner; | |
39351103 | 2569 | locus cur_loc; |
2570 | ||
2571 | cur_loc = gfc_current_locus; | |
2572 | ||
2573 | gfc_gobble_whitespace (); | |
e0be6f02 | 2574 | c = gfc_next_ascii_char (); |
39351103 | 2575 | if (c != '(') |
2576 | { | |
2577 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
2578 | goto bad; | |
2579 | } | |
2580 | ||
2581 | inner = 1; | |
2582 | while (inner) | |
2583 | { | |
2584 | gfc_gobble_whitespace (); | |
e0be6f02 | 2585 | c1 = gfc_next_ascii_char (); |
39351103 | 2586 | if (!ISALPHA (c1)) |
2587 | goto bad; | |
2588 | ||
2589 | gfc_gobble_whitespace (); | |
e0be6f02 | 2590 | c = gfc_next_ascii_char (); |
39351103 | 2591 | |
2592 | switch (c) | |
2593 | { | |
2594 | case ')': | |
f6d0e37a | 2595 | inner = 0; /* Fall through. */ |
39351103 | 2596 | |
2597 | case ',': | |
2598 | c2 = c1; | |
2599 | break; | |
2600 | ||
2601 | case '-': | |
2602 | gfc_gobble_whitespace (); | |
e0be6f02 | 2603 | c2 = gfc_next_ascii_char (); |
39351103 | 2604 | if (!ISALPHA (c2)) |
2605 | goto bad; | |
2606 | ||
2607 | gfc_gobble_whitespace (); | |
e0be6f02 | 2608 | c = gfc_next_ascii_char (); |
39351103 | 2609 | |
2610 | if ((c != ',') && (c != ')')) | |
2611 | goto bad; | |
2612 | if (c == ')') | |
2613 | inner = 0; | |
2614 | ||
2615 | break; | |
2616 | ||
2617 | default: | |
2618 | goto bad; | |
2619 | } | |
2620 | ||
2621 | if (c1 > c2) | |
2622 | { | |
2623 | gfc_error ("Letters must be in alphabetic order in " | |
2624 | "IMPLICIT statement at %C"); | |
2625 | goto bad; | |
2626 | } | |
2627 | ||
2628 | /* See if we can add the newly matched range to the pending | |
1a9745d2 | 2629 | implicits from this IMPLICIT statement. We do not check for |
2630 | conflicts with whatever earlier IMPLICIT statements may have | |
2631 | set. This is done when we've successfully finished matching | |
2632 | the current one. */ | |
b70528c7 | 2633 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
39351103 | 2634 | goto bad; |
2635 | } | |
2636 | ||
2637 | return MATCH_YES; | |
2638 | ||
2639 | bad: | |
2640 | gfc_syntax_error (ST_IMPLICIT); | |
2641 | ||
2642 | gfc_current_locus = cur_loc; | |
2643 | return MATCH_ERROR; | |
2644 | } | |
2645 | ||
2646 | ||
2647 | /* Match an IMPLICIT statement, storing the types for | |
2648 | gfc_set_implicit() if the statement is accepted by the parser. | |
2649 | There is a strange looking, but legal syntactic construction | |
2650 | possible. It looks like: | |
2651 | ||
2652 | IMPLICIT INTEGER (a-b) (c-d) | |
2653 | ||
2654 | This is legal if "a-b" is a constant expression that happens to | |
2655 | equal one of the legal kinds for integers. The real problem | |
2656 | happens with an implicit specification that looks like: | |
2657 | ||
2658 | IMPLICIT INTEGER (a-b) | |
2659 | ||
2660 | In this case, a typespec matcher that is "greedy" (as most of the | |
2661 | matchers are) gobbles the character range as a kindspec, leaving | |
2662 | nothing left. We therefore have to go a bit more slowly in the | |
2663 | matching process by inhibiting the kindspec checking during | |
2664 | typespec matching and checking for a kind later. */ | |
2665 | ||
2666 | match | |
2667 | gfc_match_implicit (void) | |
2668 | { | |
2669 | gfc_typespec ts; | |
2670 | locus cur_loc; | |
e0be6f02 | 2671 | char c; |
39351103 | 2672 | match m; |
2673 | ||
52179f31 | 2674 | gfc_clear_ts (&ts); |
2675 | ||
39351103 | 2676 | /* We don't allow empty implicit statements. */ |
2677 | if (gfc_match_eos () == MATCH_YES) | |
2678 | { | |
2679 | gfc_error ("Empty IMPLICIT statement at %C"); | |
2680 | return MATCH_ERROR; | |
2681 | } | |
2682 | ||
39351103 | 2683 | do |
2684 | { | |
b70528c7 | 2685 | /* First cleanup. */ |
2686 | gfc_clear_new_implicit (); | |
2687 | ||
39351103 | 2688 | /* A basic type is mandatory here. */ |
e8152f13 | 2689 | m = gfc_match_decl_type_spec (&ts, 1); |
39351103 | 2690 | if (m == MATCH_ERROR) |
2691 | goto error; | |
2692 | if (m == MATCH_NO) | |
2693 | goto syntax; | |
2694 | ||
2695 | cur_loc = gfc_current_locus; | |
b70528c7 | 2696 | m = match_implicit_range (); |
39351103 | 2697 | |
2698 | if (m == MATCH_YES) | |
2699 | { | |
b70528c7 | 2700 | /* We may have <TYPE> (<RANGE>). */ |
39351103 | 2701 | gfc_gobble_whitespace (); |
e0be6f02 | 2702 | c = gfc_next_ascii_char (); |
39351103 | 2703 | if ((c == '\n') || (c == ',')) |
b70528c7 | 2704 | { |
2705 | /* Check for CHARACTER with no length parameter. */ | |
eeebe20b | 2706 | if (ts.type == BT_CHARACTER && !ts.u.cl) |
b70528c7 | 2707 | { |
b8a891cb | 2708 | ts.kind = gfc_default_character_kind; |
d270ce52 | 2709 | ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
eeebe20b | 2710 | ts.u.cl->length = gfc_int_expr (1); |
b70528c7 | 2711 | } |
2712 | ||
2713 | /* Record the Successful match. */ | |
2714 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2715 | return MATCH_ERROR; | |
2716 | continue; | |
2717 | } | |
39351103 | 2718 | |
2719 | gfc_current_locus = cur_loc; | |
2720 | } | |
2721 | ||
b70528c7 | 2722 | /* Discard the (incorrectly) matched range. */ |
2723 | gfc_clear_new_implicit (); | |
2724 | ||
2725 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
2726 | if (ts.type == BT_CHARACTER) | |
10f5dcc0 | 2727 | m = gfc_match_char_spec (&ts); |
b70528c7 | 2728 | else |
39351103 | 2729 | { |
67a51c8e | 2730 | m = gfc_match_kind_spec (&ts, false); |
39351103 | 2731 | if (m == MATCH_NO) |
b70528c7 | 2732 | { |
2733 | m = gfc_match_old_kind_spec (&ts); | |
2734 | if (m == MATCH_ERROR) | |
2735 | goto error; | |
2736 | if (m == MATCH_NO) | |
2737 | goto syntax; | |
2738 | } | |
39351103 | 2739 | } |
b70528c7 | 2740 | if (m == MATCH_ERROR) |
2741 | goto error; | |
39351103 | 2742 | |
b70528c7 | 2743 | m = match_implicit_range (); |
39351103 | 2744 | if (m == MATCH_ERROR) |
2745 | goto error; | |
2746 | if (m == MATCH_NO) | |
2747 | goto syntax; | |
2748 | ||
2749 | gfc_gobble_whitespace (); | |
e0be6f02 | 2750 | c = gfc_next_ascii_char (); |
39351103 | 2751 | if ((c != '\n') && (c != ',')) |
2752 | goto syntax; | |
2753 | ||
b70528c7 | 2754 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2755 | return MATCH_ERROR; | |
39351103 | 2756 | } |
2757 | while (c == ','); | |
2758 | ||
b70528c7 | 2759 | return MATCH_YES; |
39351103 | 2760 | |
2761 | syntax: | |
2762 | gfc_syntax_error (ST_IMPLICIT); | |
2763 | ||
2764 | error: | |
2765 | return MATCH_ERROR; | |
2766 | } | |
2767 | ||
f6d0e37a | 2768 | |
d67fc9ae | 2769 | match |
2770 | gfc_match_import (void) | |
2771 | { | |
2772 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2773 | match m; | |
2774 | gfc_symbol *sym; | |
2775 | gfc_symtree *st; | |
2776 | ||
f6d0e37a | 2777 | if (gfc_current_ns->proc_name == NULL |
2778 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
d67fc9ae | 2779 | { |
2780 | gfc_error ("IMPORT statement at %C only permitted in " | |
2781 | "an INTERFACE body"); | |
2782 | return MATCH_ERROR; | |
2783 | } | |
2784 | ||
1a9745d2 | 2785 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
d67fc9ae | 2786 | == FAILURE) |
2787 | return MATCH_ERROR; | |
2788 | ||
2789 | if (gfc_match_eos () == MATCH_YES) | |
2790 | { | |
2791 | /* All host variables should be imported. */ | |
2792 | gfc_current_ns->has_import_set = 1; | |
2793 | return MATCH_YES; | |
2794 | } | |
2795 | ||
2796 | if (gfc_match (" ::") == MATCH_YES) | |
2797 | { | |
2798 | if (gfc_match_eos () == MATCH_YES) | |
1a9745d2 | 2799 | { |
2800 | gfc_error ("Expecting list of named entities at %C"); | |
2801 | return MATCH_ERROR; | |
2802 | } | |
d67fc9ae | 2803 | } |
2804 | ||
2805 | for(;;) | |
2806 | { | |
2807 | m = gfc_match (" %n", name); | |
2808 | switch (m) | |
2809 | { | |
2810 | case MATCH_YES: | |
096d4ad9 | 2811 | if (gfc_current_ns->parent != NULL |
f6d0e37a | 2812 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
096d4ad9 | 2813 | { |
2814 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2815 | return MATCH_ERROR; | |
2816 | } | |
2817 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
f6d0e37a | 2818 | && gfc_find_symbol (name, |
2819 | gfc_current_ns->proc_name->ns->parent, | |
2820 | 1, &sym)) | |
1a9745d2 | 2821 | { |
2822 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2823 | return MATCH_ERROR; | |
2824 | } | |
2825 | ||
2826 | if (sym == NULL) | |
2827 | { | |
2828 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2829 | "at %C - does not exist.", name); | |
2830 | return MATCH_ERROR; | |
2831 | } | |
2832 | ||
e14bee04 | 2833 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) |
1a9745d2 | 2834 | { |
2835 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2836 | "at %C.", name); | |
2837 | goto next_item; | |
2838 | } | |
2839 | ||
a15d1caf | 2840 | st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name); |
1a9745d2 | 2841 | st->n.sym = sym; |
2842 | sym->refs++; | |
c723595c | 2843 | sym->attr.imported = 1; |
d67fc9ae | 2844 | |
2845 | goto next_item; | |
2846 | ||
2847 | case MATCH_NO: | |
2848 | break; | |
2849 | ||
2850 | case MATCH_ERROR: | |
2851 | return MATCH_ERROR; | |
2852 | } | |
2853 | ||
2854 | next_item: | |
2855 | if (gfc_match_eos () == MATCH_YES) | |
2856 | break; | |
2857 | if (gfc_match_char (',') != MATCH_YES) | |
2858 | goto syntax; | |
2859 | } | |
2860 | ||
2861 | return MATCH_YES; | |
2862 | ||
2863 | syntax: | |
2864 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2865 | return MATCH_ERROR; | |
2866 | } | |
39351103 | 2867 | |
f6d0e37a | 2868 | |
c72e5f7e | 2869 | /* A minimal implementation of gfc_match without whitespace, escape |
2870 | characters or variable arguments. Returns true if the next | |
2871 | characters match the TARGET template exactly. */ | |
2872 | ||
2873 | static bool | |
2874 | match_string_p (const char *target) | |
2875 | { | |
2876 | const char *p; | |
2877 | ||
2878 | for (p = target; *p; p++) | |
e0be6f02 | 2879 | if ((char) gfc_next_ascii_char () != *p) |
c72e5f7e | 2880 | return false; |
2881 | return true; | |
2882 | } | |
2883 | ||
4ee9c684 | 2884 | /* Matches an attribute specification including array specs. If |
2885 | successful, leaves the variables current_attr and current_as | |
2886 | holding the specification. Also sets the colon_seen variable for | |
2887 | later use by matchers associated with initializations. | |
2888 | ||
2889 | This subroutine is a little tricky in the sense that we don't know | |
2890 | if we really have an attr-spec until we hit the double colon. | |
2891 | Until that time, we can only return MATCH_NO. This forces us to | |
2892 | check for duplicate specification at this level. */ | |
2893 | ||
2894 | static match | |
2895 | match_attr_spec (void) | |
2896 | { | |
4ee9c684 | 2897 | /* Modifiers that can exist in a type statement. */ |
2898 | typedef enum | |
2899 | { GFC_DECL_BEGIN = 0, | |
2900 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
2901 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
3ea52af3 | 2902 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
2903 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
c72e5f7e | 2904 | DECL_IS_BIND_C, DECL_NONE, |
4ee9c684 | 2905 | GFC_DECL_END /* Sentinel */ |
2906 | } | |
2907 | decl_types; | |
2908 | ||
2909 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
2910 | #define NUM_DECL GFC_DECL_END | |
2911 | ||
4ee9c684 | 2912 | locus start, seen_at[NUM_DECL]; |
2913 | int seen[NUM_DECL]; | |
9f1b7d17 | 2914 | unsigned int d; |
4ee9c684 | 2915 | const char *attr; |
2916 | match m; | |
f6bb8f4b | 2917 | gfc_try t; |
4ee9c684 | 2918 | |
2919 | gfc_clear_attr (¤t_attr); | |
cbb9e6aa | 2920 | start = gfc_current_locus; |
4ee9c684 | 2921 | |
2922 | current_as = NULL; | |
2923 | colon_seen = 0; | |
2924 | ||
2925 | /* See if we get all of the keywords up to the final double colon. */ | |
2926 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2927 | seen[d] = 0; | |
2928 | ||
2929 | for (;;) | |
2930 | { | |
e0be6f02 | 2931 | char ch; |
c5d33754 | 2932 | |
c72e5f7e | 2933 | d = DECL_NONE; |
2934 | gfc_gobble_whitespace (); | |
2935 | ||
e0be6f02 | 2936 | ch = gfc_next_ascii_char (); |
c72e5f7e | 2937 | if (ch == ':') |
2938 | { | |
2939 | /* This is the successful exit condition for the loop. */ | |
e0be6f02 | 2940 | if (gfc_next_ascii_char () == ':') |
c72e5f7e | 2941 | break; |
2942 | } | |
2943 | else if (ch == ',') | |
c5d33754 | 2944 | { |
c5d33754 | 2945 | gfc_gobble_whitespace (); |
e0be6f02 | 2946 | switch (gfc_peek_ascii_char ()) |
c5d33754 | 2947 | { |
c72e5f7e | 2948 | case 'a': |
2949 | if (match_string_p ("allocatable")) | |
2950 | d = DECL_ALLOCATABLE; | |
2951 | break; | |
2952 | ||
2953 | case 'b': | |
c5d33754 | 2954 | /* Try and match the bind(c). */ |
75ae7f6c | 2955 | m = gfc_match_bind_c (NULL, true); |
5cf92482 | 2956 | if (m == MATCH_YES) |
c5d33754 | 2957 | d = DECL_IS_BIND_C; |
5cf92482 | 2958 | else if (m == MATCH_ERROR) |
2959 | goto cleanup; | |
c72e5f7e | 2960 | break; |
2961 | ||
2962 | case 'd': | |
2963 | if (match_string_p ("dimension")) | |
2964 | d = DECL_DIMENSION; | |
2965 | break; | |
2966 | ||
2967 | case 'e': | |
2968 | if (match_string_p ("external")) | |
2969 | d = DECL_EXTERNAL; | |
2970 | break; | |
2971 | ||
2972 | case 'i': | |
2973 | if (match_string_p ("int")) | |
2974 | { | |
e0be6f02 | 2975 | ch = gfc_next_ascii_char (); |
c72e5f7e | 2976 | if (ch == 'e') |
2977 | { | |
2978 | if (match_string_p ("nt")) | |
2979 | { | |
2980 | /* Matched "intent". */ | |
2981 | /* TODO: Call match_intent_spec from here. */ | |
2982 | if (gfc_match (" ( in out )") == MATCH_YES) | |
2983 | d = DECL_INOUT; | |
2984 | else if (gfc_match (" ( in )") == MATCH_YES) | |
2985 | d = DECL_IN; | |
2986 | else if (gfc_match (" ( out )") == MATCH_YES) | |
2987 | d = DECL_OUT; | |
2988 | } | |
2989 | } | |
2990 | else if (ch == 'r') | |
2991 | { | |
2992 | if (match_string_p ("insic")) | |
2993 | { | |
2994 | /* Matched "intrinsic". */ | |
2995 | d = DECL_INTRINSIC; | |
2996 | } | |
2997 | } | |
2998 | } | |
2999 | break; | |
3000 | ||
3001 | case 'o': | |
3002 | if (match_string_p ("optional")) | |
3003 | d = DECL_OPTIONAL; | |
3004 | break; | |
3005 | ||
3006 | case 'p': | |
e0be6f02 | 3007 | gfc_next_ascii_char (); |
3008 | switch (gfc_next_ascii_char ()) | |
c72e5f7e | 3009 | { |
3010 | case 'a': | |
3011 | if (match_string_p ("rameter")) | |
3012 | { | |
3013 | /* Matched "parameter". */ | |
3014 | d = DECL_PARAMETER; | |
3015 | } | |
3016 | break; | |
3017 | ||
3018 | case 'o': | |
3019 | if (match_string_p ("inter")) | |
3020 | { | |
3021 | /* Matched "pointer". */ | |
3022 | d = DECL_POINTER; | |
3023 | } | |
3024 | break; | |
3025 | ||
3026 | case 'r': | |
e0be6f02 | 3027 | ch = gfc_next_ascii_char (); |
c72e5f7e | 3028 | if (ch == 'i') |
3029 | { | |
3030 | if (match_string_p ("vate")) | |
3031 | { | |
3032 | /* Matched "private". */ | |
3033 | d = DECL_PRIVATE; | |
3034 | } | |
3035 | } | |
3036 | else if (ch == 'o') | |
3037 | { | |
3038 | if (match_string_p ("tected")) | |
3039 | { | |
3040 | /* Matched "protected". */ | |
3041 | d = DECL_PROTECTED; | |
3042 | } | |
3043 | } | |
3044 | break; | |
3045 | ||
3046 | case 'u': | |
3047 | if (match_string_p ("blic")) | |
3048 | { | |
3049 | /* Matched "public". */ | |
3050 | d = DECL_PUBLIC; | |
3051 | } | |
3052 | break; | |
3053 | } | |
3054 | break; | |
3055 | ||
3056 | case 's': | |
3057 | if (match_string_p ("save")) | |
3058 | d = DECL_SAVE; | |
3059 | break; | |
3060 | ||
3061 | case 't': | |
3062 | if (match_string_p ("target")) | |
3063 | d = DECL_TARGET; | |
3064 | break; | |
3065 | ||
3066 | case 'v': | |
e0be6f02 | 3067 | gfc_next_ascii_char (); |
3068 | ch = gfc_next_ascii_char (); | |
c72e5f7e | 3069 | if (ch == 'a') |
3070 | { | |
3071 | if (match_string_p ("lue")) | |
3072 | { | |
3073 | /* Matched "value". */ | |
3074 | d = DECL_VALUE; | |
3075 | } | |
3076 | } | |
3077 | else if (ch == 'o') | |
3078 | { | |
3079 | if (match_string_p ("latile")) | |
3080 | { | |
3081 | /* Matched "volatile". */ | |
3082 | d = DECL_VOLATILE; | |
3083 | } | |
3084 | } | |
3085 | break; | |
c5d33754 | 3086 | } |
3087 | } | |
f3f9b222 | 3088 | |
c72e5f7e | 3089 | /* No double colon and no recognizable decl_type, so assume that |
3090 | we've been looking at something else the whole time. */ | |
3091 | if (d == DECL_NONE) | |
3092 | { | |
3093 | m = MATCH_NO; | |
3094 | goto cleanup; | |
3095 | } | |
e14bee04 | 3096 | |
7e221851 | 3097 | /* Check to make sure any parens are paired up correctly. */ |
3098 | if (gfc_match_parens () == MATCH_ERROR) | |
3099 | { | |
3100 | m = MATCH_ERROR; | |
3101 | goto cleanup; | |
3102 | } | |
3103 | ||
4ee9c684 | 3104 | seen[d]++; |
cbb9e6aa | 3105 | seen_at[d] = gfc_current_locus; |
4ee9c684 | 3106 | |
3107 | if (d == DECL_DIMENSION) | |
3108 | { | |
3109 | m = gfc_match_array_spec (¤t_as); | |
3110 | ||
3111 | if (m == MATCH_NO) | |
3112 | { | |
3113 | gfc_error ("Missing dimension specification at %C"); | |
3114 | m = MATCH_ERROR; | |
3115 | } | |
3116 | ||
3117 | if (m == MATCH_ERROR) | |
3118 | goto cleanup; | |
3119 | } | |
3120 | } | |
3121 | ||
4ee9c684 | 3122 | /* Since we've seen a double colon, we have to be looking at an |
3123 | attr-spec. This means that we can now issue errors. */ | |
3124 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3125 | if (seen[d] > 1) | |
3126 | { | |
3127 | switch (d) | |
3128 | { | |
3129 | case DECL_ALLOCATABLE: | |
3130 | attr = "ALLOCATABLE"; | |
3131 | break; | |
3132 | case DECL_DIMENSION: | |
3133 | attr = "DIMENSION"; | |
3134 | break; | |
3135 | case DECL_EXTERNAL: | |
3136 | attr = "EXTERNAL"; | |
3137 | break; | |
3138 | case DECL_IN: | |
3139 | attr = "INTENT (IN)"; | |
3140 | break; | |
3141 | case DECL_OUT: | |
3142 | attr = "INTENT (OUT)"; | |
3143 | break; | |
3144 | case DECL_INOUT: | |
3145 | attr = "INTENT (IN OUT)"; | |
3146 | break; | |
3147 | case DECL_INTRINSIC: | |
3148 | attr = "INTRINSIC"; | |
3149 | break; | |
3150 | case DECL_OPTIONAL: | |
3151 | attr = "OPTIONAL"; | |
3152 | break; | |
3153 | case DECL_PARAMETER: | |
3154 | attr = "PARAMETER"; | |
3155 | break; | |
3156 | case DECL_POINTER: | |
3157 | attr = "POINTER"; | |
3158 | break; | |
3ea52af3 | 3159 | case DECL_PROTECTED: |
3160 | attr = "PROTECTED"; | |
3161 | break; | |
4ee9c684 | 3162 | case DECL_PRIVATE: |
3163 | attr = "PRIVATE"; | |
3164 | break; | |
3165 | case DECL_PUBLIC: | |
3166 | attr = "PUBLIC"; | |
3167 | break; | |
3168 | case DECL_SAVE: | |
3169 | attr = "SAVE"; | |
3170 | break; | |
3171 | case DECL_TARGET: | |
3172 | attr = "TARGET"; | |
3173 | break; | |
c5d33754 | 3174 | case DECL_IS_BIND_C: |
3175 | attr = "IS_BIND_C"; | |
3176 | break; | |
3177 | case DECL_VALUE: | |
3178 | attr = "VALUE"; | |
3179 | break; | |
ef814c81 | 3180 | case DECL_VOLATILE: |
3181 | attr = "VOLATILE"; | |
3182 | break; | |
4ee9c684 | 3183 | default: |
f6d0e37a | 3184 | attr = NULL; /* This shouldn't happen. */ |
4ee9c684 | 3185 | } |
3186 | ||
3187 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
3188 | m = MATCH_ERROR; | |
3189 | goto cleanup; | |
3190 | } | |
3191 | ||
3192 | /* Now that we've dealt with duplicate attributes, add the attributes | |
3193 | to the current attribute. */ | |
3194 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3195 | { | |
3196 | if (seen[d] == 0) | |
3197 | continue; | |
3198 | ||
3199 | if (gfc_current_state () == COMP_DERIVED | |
3200 | && d != DECL_DIMENSION && d != DECL_POINTER | |
c72e5f7e | 3201 | && d != DECL_PRIVATE && d != DECL_PUBLIC |
3202 | && d != DECL_NONE) | |
4ee9c684 | 3203 | { |
2294b616 | 3204 | if (d == DECL_ALLOCATABLE) |
3205 | { | |
1a9745d2 | 3206 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
3207 | "attribute at %C in a TYPE definition") | |
e14bee04 | 3208 | == FAILURE) |
2294b616 | 3209 | { |
3210 | m = MATCH_ERROR; | |
3211 | goto cleanup; | |
3212 | } | |
1a9745d2 | 3213 | } |
3214 | else | |
2294b616 | 3215 | { |
3216 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
e14bee04 | 3217 | &seen_at[d]); |
2294b616 | 3218 | m = MATCH_ERROR; |
3219 | goto cleanup; | |
3220 | } | |
4ee9c684 | 3221 | } |
3222 | ||
ea13b9b7 | 3223 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
1a9745d2 | 3224 | && gfc_current_state () != COMP_MODULE) |
ea13b9b7 | 3225 | { |
3226 | if (d == DECL_PRIVATE) | |
3227 | attr = "PRIVATE"; | |
3228 | else | |
3229 | attr = "PUBLIC"; | |
e14bee04 | 3230 | if (gfc_current_state () == COMP_DERIVED |
3231 | && gfc_state_stack->previous | |
3232 | && gfc_state_stack->previous->state == COMP_MODULE) | |
3233 | { | |
3234 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s " | |
3235 | "at %L in a TYPE definition", attr, | |
3236 | &seen_at[d]) | |
3237 | == FAILURE) | |
3238 | { | |
3239 | m = MATCH_ERROR; | |
3240 | goto cleanup; | |
3241 | } | |
3242 | } | |
3243 | else | |
3244 | { | |
3245 | gfc_error ("%s attribute at %L is not allowed outside of the " | |
3246 | "specification part of a module", attr, &seen_at[d]); | |
3247 | m = MATCH_ERROR; | |
3248 | goto cleanup; | |
3249 | } | |
ea13b9b7 | 3250 | } |
3251 | ||
4ee9c684 | 3252 | switch (d) |
3253 | { | |
3254 | case DECL_ALLOCATABLE: | |
3255 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
3256 | break; | |
3257 | ||
3258 | case DECL_DIMENSION: | |
950683ed | 3259 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 3260 | break; |
3261 | ||
3262 | case DECL_EXTERNAL: | |
3263 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
3264 | break; | |
3265 | ||
3266 | case DECL_IN: | |
3267 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
3268 | break; | |
3269 | ||
3270 | case DECL_OUT: | |
3271 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
3272 | break; | |
3273 | ||
3274 | case DECL_INOUT: | |
3275 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
3276 | break; | |
3277 | ||
3278 | case DECL_INTRINSIC: | |
3279 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
3280 | break; | |
3281 | ||
3282 | case DECL_OPTIONAL: | |
3283 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
3284 | break; | |
3285 | ||
3286 | case DECL_PARAMETER: | |
950683ed | 3287 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
4ee9c684 | 3288 | break; |
3289 | ||
3290 | case DECL_POINTER: | |
3291 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
3292 | break; | |
3293 | ||
3ea52af3 | 3294 | case DECL_PROTECTED: |
3295 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
3296 | { | |
3297 | gfc_error ("PROTECTED at %C only allowed in specification " | |
3298 | "part of a module"); | |
3299 | t = FAILURE; | |
3300 | break; | |
3301 | } | |
3302 | ||
1a9745d2 | 3303 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
3304 | "attribute at %C") | |
3ea52af3 | 3305 | == FAILURE) |
3306 | t = FAILURE; | |
3307 | else | |
3308 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
3309 | break; | |
3310 | ||
4ee9c684 | 3311 | case DECL_PRIVATE: |
950683ed | 3312 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
3313 | &seen_at[d]); | |
4ee9c684 | 3314 | break; |
3315 | ||
3316 | case DECL_PUBLIC: | |
950683ed | 3317 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
3318 | &seen_at[d]); | |
4ee9c684 | 3319 | break; |
3320 | ||
3321 | case DECL_SAVE: | |
950683ed | 3322 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 3323 | break; |
3324 | ||
3325 | case DECL_TARGET: | |
3326 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
3327 | break; | |
3328 | ||
c5d33754 | 3329 | case DECL_IS_BIND_C: |
3330 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); | |
3331 | break; | |
3332 | ||
8f6339b6 | 3333 | case DECL_VALUE: |
1a9745d2 | 3334 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
3335 | "at %C") | |
8f6339b6 | 3336 | == FAILURE) |
3337 | t = FAILURE; | |
3338 | else | |
3339 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
3340 | break; | |
3341 | ||
ef814c81 | 3342 | case DECL_VOLATILE: |
3343 | if (gfc_notify_std (GFC_STD_F2003, | |
1a9745d2 | 3344 | "Fortran 2003: VOLATILE attribute at %C") |
ef814c81 | 3345 | == FAILURE) |
3346 | t = FAILURE; | |
3347 | else | |
3348 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
3349 | break; | |
3350 | ||
4ee9c684 | 3351 | default: |
3352 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
3353 | } | |
3354 | ||
3355 | if (t == FAILURE) | |
3356 | { | |
3357 | m = MATCH_ERROR; | |
3358 | goto cleanup; | |
3359 | } | |
3360 | } | |
3361 | ||
3362 | colon_seen = 1; | |
3363 | return MATCH_YES; | |
3364 | ||
3365 | cleanup: | |
cbb9e6aa | 3366 | gfc_current_locus = start; |
4ee9c684 | 3367 | gfc_free_array_spec (current_as); |
3368 | current_as = NULL; | |
3369 | return m; | |
3370 | } | |
3371 | ||
3372 | ||
c5d33754 | 3373 | /* Set the binding label, dest_label, either with the binding label |
3374 | stored in the given gfc_typespec, ts, or if none was provided, it | |
3375 | will be the symbol name in all lower case, as required by the draft | |
3376 | (J3/04-007, section 15.4.1). If a binding label was given and | |
3377 | there is more than one argument (num_idents), it is an error. */ | |
3378 | ||
f6bb8f4b | 3379 | gfc_try |
c5d33754 | 3380 | set_binding_label (char *dest_label, const char *sym_name, int num_idents) |
3381 | { | |
825718f9 | 3382 | if (num_idents > 1 && has_name_equals) |
c5d33754 | 3383 | { |
825718f9 | 3384 | gfc_error ("Multiple identifiers provided with " |
3385 | "single NAME= specifier at %C"); | |
3386 | return FAILURE; | |
3387 | } | |
c5d33754 | 3388 | |
825718f9 | 3389 | if (curr_binding_label[0] != '\0') |
3390 | { | |
c5d33754 | 3391 | /* Binding label given; store in temp holder til have sym. */ |
b1223b39 | 3392 | strcpy (dest_label, curr_binding_label); |
c5d33754 | 3393 | } |
3394 | else | |
3395 | { | |
3396 | /* No binding label given, and the NAME= specifier did not exist, | |
3397 | which means there was no NAME="". */ | |
3398 | if (sym_name != NULL && has_name_equals == 0) | |
b1223b39 | 3399 | strcpy (dest_label, sym_name); |
c5d33754 | 3400 | } |
3401 | ||
3402 | return SUCCESS; | |
3403 | } | |
3404 | ||
3405 | ||
3406 | /* Set the status of the given common block as being BIND(C) or not, | |
3407 | depending on the given parameter, is_bind_c. */ | |
3408 | ||
3409 | void | |
3410 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) | |
3411 | { | |
3412 | com_block->is_bind_c = is_bind_c; | |
3413 | return; | |
3414 | } | |
3415 | ||
3416 | ||
3417 | /* Verify that the given gfc_typespec is for a C interoperable type. */ | |
3418 | ||
f6bb8f4b | 3419 | gfc_try |
209d3778 | 3420 | verify_c_interop (gfc_typespec *ts) |
c5d33754 | 3421 | { |
eeebe20b | 3422 | if (ts->type == BT_DERIVED && ts->u.derived != NULL) |
3423 | return (ts->u.derived->ts.is_c_interop ? SUCCESS : FAILURE); | |
c5d33754 | 3424 | else if (ts->is_c_interop != 1) |
3425 | return FAILURE; | |
3426 | ||
3427 | return SUCCESS; | |
3428 | } | |
3429 | ||
3430 | ||
3431 | /* Verify that the variables of a given common block, which has been | |
3432 | defined with the attribute specifier bind(c), to be of a C | |
3433 | interoperable type. Errors will be reported here, if | |
3434 | encountered. */ | |
3435 | ||
f6bb8f4b | 3436 | gfc_try |
c5d33754 | 3437 | verify_com_block_vars_c_interop (gfc_common_head *com_block) |
3438 | { | |
3439 | gfc_symbol *curr_sym = NULL; | |
f6bb8f4b | 3440 | gfc_try retval = SUCCESS; |
c5d33754 | 3441 | |
3442 | curr_sym = com_block->head; | |
3443 | ||
3444 | /* Make sure we have at least one symbol. */ | |
3445 | if (curr_sym == NULL) | |
3446 | return retval; | |
3447 | ||
3448 | /* Here we know we have a symbol, so we'll execute this loop | |
3449 | at least once. */ | |
3450 | do | |
3451 | { | |
3452 | /* The second to last param, 1, says this is in a common block. */ | |
3453 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); | |
3454 | curr_sym = curr_sym->common_next; | |
3455 | } while (curr_sym != NULL); | |
3456 | ||
3457 | return retval; | |
3458 | } | |
3459 | ||
3460 | ||
3461 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, | |
3462 | an appropriate error message is reported. */ | |
3463 | ||
f6bb8f4b | 3464 | gfc_try |
c5d33754 | 3465 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, |
3466 | int is_in_common, gfc_common_head *com_block) | |
3467 | { | |
1f2ab120 | 3468 | bool bind_c_function = false; |
f6bb8f4b | 3469 | gfc_try retval = SUCCESS; |
4f7bb9ec | 3470 | |
1f2ab120 | 3471 | if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c) |
3472 | bind_c_function = true; | |
3473 | ||
4f7bb9ec | 3474 | if (tmp_sym->attr.function && tmp_sym->result != NULL) |
3475 | { | |
3476 | tmp_sym = tmp_sym->result; | |
3477 | /* Make sure it wasn't an implicitly typed result. */ | |
3478 | if (tmp_sym->attr.implicit_type) | |
3479 | { | |
3480 | gfc_warning ("Implicitly declared BIND(C) function '%s' at " | |
3481 | "%L may not be C interoperable", tmp_sym->name, | |
3482 | &tmp_sym->declared_at); | |
3483 | tmp_sym->ts.f90_type = tmp_sym->ts.type; | |
3484 | /* Mark it as C interoperable to prevent duplicate warnings. */ | |
3485 | tmp_sym->ts.is_c_interop = 1; | |
3486 | tmp_sym->attr.is_c_interop = 1; | |
3487 | } | |
3488 | } | |
1f2ab120 | 3489 | |
c5d33754 | 3490 | /* Here, we know we have the bind(c) attribute, so if we have |
3491 | enough type info, then verify that it's a C interop kind. | |
3492 | The info could be in the symbol already, or possibly still in | |
3493 | the given ts (current_ts), so look in both. */ | |
3494 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) | |
3495 | { | |
209d3778 | 3496 | if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS) |
c5d33754 | 3497 | { |
3498 | /* See if we're dealing with a sym in a common block or not. */ | |
3499 | if (is_in_common == 1) | |
3500 | { | |
3501 | gfc_warning ("Variable '%s' in common block '%s' at %L " | |
3502 | "may not be a C interoperable " | |
3503 | "kind though common block '%s' is BIND(C)", | |
3504 | tmp_sym->name, com_block->name, | |
3505 | &(tmp_sym->declared_at), com_block->name); | |
3506 | } | |
3507 | else | |
3508 | { | |
3509 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) | |
3510 | gfc_error ("Type declaration '%s' at %L is not C " | |
3511 | "interoperable but it is BIND(C)", | |
3512 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3513 | else | |
3514 | gfc_warning ("Variable '%s' at %L " | |
3515 | "may not be a C interoperable " | |
3516 | "kind but it is bind(c)", | |
3517 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3518 | } | |
3519 | } | |
3520 | ||
3521 | /* Variables declared w/in a common block can't be bind(c) | |
3522 | since there's no way for C to see these variables, so there's | |
3523 | semantically no reason for the attribute. */ | |
3524 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) | |
3525 | { | |
3526 | gfc_error ("Variable '%s' in common block '%s' at " | |
3527 | "%L cannot be declared with BIND(C) " | |
3528 | "since it is not a global", | |
3529 | tmp_sym->name, com_block->name, | |
3530 | &(tmp_sym->declared_at)); | |
3531 | retval = FAILURE; | |
3532 | } | |
3533 | ||
3534 | /* Scalar variables that are bind(c) can not have the pointer | |
3535 | or allocatable attributes. */ | |
3536 | if (tmp_sym->attr.is_bind_c == 1) | |
3537 | { | |
3538 | if (tmp_sym->attr.pointer == 1) | |
3539 | { | |
3540 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3541 | "POINTER and BIND(C) attributes", | |
3542 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3543 | retval = FAILURE; | |
3544 | } | |
3545 | ||
3546 | if (tmp_sym->attr.allocatable == 1) | |
3547 | { | |
3548 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3549 | "ALLOCATABLE and BIND(C) attributes", | |
3550 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3551 | retval = FAILURE; | |
3552 | } | |
3553 | ||
1f2ab120 | 3554 | } |
3555 | ||
3556 | /* If it is a BIND(C) function, make sure the return value is a | |
3557 | scalar value. The previous tests in this function made sure | |
3558 | the type is interoperable. */ | |
3559 | if (bind_c_function && tmp_sym->as != NULL) | |
3560 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3561 | "be an array", tmp_sym->name, &(tmp_sym->declared_at)); | |
3562 | ||
3563 | /* BIND(C) functions can not return a character string. */ | |
3564 | if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER) | |
eeebe20b | 3565 | if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL |
3566 | || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT | |
3567 | || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0) | |
1f2ab120 | 3568 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " |
c5d33754 | 3569 | "be a character string", tmp_sym->name, |
3570 | &(tmp_sym->declared_at)); | |
c5d33754 | 3571 | } |
3572 | ||
3573 | /* See if the symbol has been marked as private. If it has, make sure | |
3574 | there is no binding label and warn the user if there is one. */ | |
3575 | if (tmp_sym->attr.access == ACCESS_PRIVATE | |
3576 | && tmp_sym->binding_label[0] != '\0') | |
3577 | /* Use gfc_warning_now because we won't say that the symbol fails | |
3578 | just because of this. */ | |
3579 | gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " | |
3580 | "given the binding label '%s'", tmp_sym->name, | |
3581 | &(tmp_sym->declared_at), tmp_sym->binding_label); | |
3582 | ||
3583 | return retval; | |
3584 | } | |
3585 | ||
3586 | ||
3587 | /* Set the appropriate fields for a symbol that's been declared as | |
3588 | BIND(C) (the is_bind_c flag and the binding label), and verify that | |
3589 | the type is C interoperable. Errors are reported by the functions | |
3590 | used to set/test these fields. */ | |
3591 | ||
f6bb8f4b | 3592 | gfc_try |
c5d33754 | 3593 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) |
3594 | { | |
f6bb8f4b | 3595 | gfc_try retval = SUCCESS; |
c5d33754 | 3596 | |
3597 | /* TODO: Do we need to make sure the vars aren't marked private? */ | |
3598 | ||
3599 | /* Set the is_bind_c bit in symbol_attribute. */ | |
3600 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); | |
3601 | ||
3602 | if (set_binding_label (tmp_sym->binding_label, tmp_sym->name, | |
3603 | num_idents) != SUCCESS) | |
3604 | return FAILURE; | |
3605 | ||
3606 | return retval; | |
3607 | } | |
3608 | ||
3609 | ||
3610 | /* Set the fields marking the given common block as BIND(C), including | |
3611 | a binding label, and report any errors encountered. */ | |
3612 | ||
f6bb8f4b | 3613 | gfc_try |
c5d33754 | 3614 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) |
3615 | { | |
f6bb8f4b | 3616 | gfc_try retval = SUCCESS; |
c5d33754 | 3617 | |
3618 | /* destLabel, common name, typespec (which may have binding label). */ | |
3619 | if (set_binding_label (com_block->binding_label, com_block->name, num_idents) | |
3620 | != SUCCESS) | |
3621 | return FAILURE; | |
3622 | ||
3623 | /* Set the given common block (com_block) to being bind(c) (1). */ | |
3624 | set_com_block_bind_c (com_block, 1); | |
3625 | ||
3626 | return retval; | |
3627 | } | |
3628 | ||
3629 | ||
3630 | /* Retrieve the list of one or more identifiers that the given bind(c) | |
3631 | attribute applies to. */ | |
3632 | ||
f6bb8f4b | 3633 | gfc_try |
c5d33754 | 3634 | get_bind_c_idents (void) |
3635 | { | |
3636 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3637 | int num_idents = 0; | |
3638 | gfc_symbol *tmp_sym = NULL; | |
3639 | match found_id; | |
3640 | gfc_common_head *com_block = NULL; | |
3641 | ||
3642 | if (gfc_match_name (name) == MATCH_YES) | |
3643 | { | |
3644 | found_id = MATCH_YES; | |
3645 | gfc_get_ha_symbol (name, &tmp_sym); | |
3646 | } | |
3647 | else if (match_common_name (name) == MATCH_YES) | |
3648 | { | |
3649 | found_id = MATCH_YES; | |
3650 | com_block = gfc_get_common (name, 0); | |
3651 | } | |
3652 | else | |
3653 | { | |
3654 | gfc_error ("Need either entity or common block name for " | |
3655 | "attribute specification statement at %C"); | |
3656 | return FAILURE; | |
3657 | } | |
3658 | ||
3659 | /* Save the current identifier and look for more. */ | |
3660 | do | |
3661 | { | |
3662 | /* Increment the number of identifiers found for this spec stmt. */ | |
3663 | num_idents++; | |
3664 | ||
3665 | /* Make sure we have a sym or com block, and verify that it can | |
3666 | be bind(c). Set the appropriate field(s) and look for more | |
3667 | identifiers. */ | |
3668 | if (tmp_sym != NULL || com_block != NULL) | |
3669 | { | |
3670 | if (tmp_sym != NULL) | |
3671 | { | |
3672 | if (set_verify_bind_c_sym (tmp_sym, num_idents) | |
3673 | != SUCCESS) | |
3674 | return FAILURE; | |
3675 | } | |
3676 | else | |
3677 | { | |
3678 | if (set_verify_bind_c_com_block(com_block, num_idents) | |
3679 | != SUCCESS) | |
3680 | return FAILURE; | |
3681 | } | |
3682 | ||
3683 | /* Look to see if we have another identifier. */ | |
3684 | tmp_sym = NULL; | |
3685 | if (gfc_match_eos () == MATCH_YES) | |
3686 | found_id = MATCH_NO; | |
3687 | else if (gfc_match_char (',') != MATCH_YES) | |
3688 | found_id = MATCH_NO; | |
3689 | else if (gfc_match_name (name) == MATCH_YES) | |
3690 | { | |
3691 | found_id = MATCH_YES; | |
3692 | gfc_get_ha_symbol (name, &tmp_sym); | |
3693 | } | |
3694 | else if (match_common_name (name) == MATCH_YES) | |
3695 | { | |
3696 | found_id = MATCH_YES; | |
3697 | com_block = gfc_get_common (name, 0); | |
3698 | } | |
3699 | else | |
3700 | { | |
3701 | gfc_error ("Missing entity or common block name for " | |
3702 | "attribute specification statement at %C"); | |
3703 | return FAILURE; | |
3704 | } | |
3705 | } | |
3706 | else | |
3707 | { | |
3708 | gfc_internal_error ("Missing symbol"); | |
3709 | } | |
3710 | } while (found_id == MATCH_YES); | |
3711 | ||
3712 | /* if we get here we were successful */ | |
3713 | return SUCCESS; | |
3714 | } | |
3715 | ||
3716 | ||
3717 | /* Try and match a BIND(C) attribute specification statement. */ | |
3718 | ||
3719 | match | |
3720 | gfc_match_bind_c_stmt (void) | |
3721 | { | |
3722 | match found_match = MATCH_NO; | |
3723 | gfc_typespec *ts; | |
3724 | ||
3725 | ts = ¤t_ts; | |
3726 | ||
3727 | /* This may not be necessary. */ | |
3728 | gfc_clear_ts (ts); | |
3729 | /* Clear the temporary binding label holder. */ | |
3730 | curr_binding_label[0] = '\0'; | |
3731 | ||
3732 | /* Look for the bind(c). */ | |
75ae7f6c | 3733 | found_match = gfc_match_bind_c (NULL, true); |
c5d33754 | 3734 | |
3735 | if (found_match == MATCH_YES) | |
3736 | { | |
3737 | /* Look for the :: now, but it is not required. */ | |
3738 | gfc_match (" :: "); | |
3739 | ||
3740 | /* Get the identifier(s) that needs to be updated. This may need to | |
3741 | change to hand the flag(s) for the attr specified so all identifiers | |
3742 | found can have all appropriate parts updated (assuming that the same | |
3743 | spec stmt can have multiple attrs, such as both bind(c) and | |
3744 | allocatable...). */ | |
3745 | if (get_bind_c_idents () != SUCCESS) | |
3746 | /* Error message should have printed already. */ | |
3747 | return MATCH_ERROR; | |
3748 | } | |
3749 | ||
3750 | return found_match; | |
3751 | } | |
3752 | ||
3753 | ||
4ee9c684 | 3754 | /* Match a data declaration statement. */ |
3755 | ||
3756 | match | |
3757 | gfc_match_data_decl (void) | |
3758 | { | |
3759 | gfc_symbol *sym; | |
3760 | match m; | |
3923b69f | 3761 | int elem; |
4ee9c684 | 3762 | |
c5d33754 | 3763 | num_idents_on_line = 0; |
3764 | ||
e8152f13 | 3765 | m = gfc_match_decl_type_spec (¤t_ts, 0); |
4ee9c684 | 3766 | if (m != MATCH_YES) |
3767 | return m; | |
3768 | ||
b3704193 | 3769 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
3770 | && gfc_current_state () != COMP_DERIVED) | |
4ee9c684 | 3771 | { |
eeebe20b | 3772 | sym = gfc_use_derived (current_ts.u.derived); |
4ee9c684 | 3773 | |
3774 | if (sym == NULL) | |
3775 | { | |
3776 | m = MATCH_ERROR; | |
3777 | goto cleanup; | |
3778 | } | |
3779 | ||
eeebe20b | 3780 | current_ts.u.derived = sym; |
4ee9c684 | 3781 | } |
3782 | ||
3783 | m = match_attr_spec (); | |
3784 | if (m == MATCH_ERROR) | |
3785 | { | |
3786 | m = MATCH_NO; | |
3787 | goto cleanup; | |
3788 | } | |
3789 | ||
b3704193 | 3790 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
3791 | && current_ts.u.derived->components == NULL | |
eeebe20b | 3792 | && !current_ts.u.derived->attr.zero_comp) |
4ee9c684 | 3793 | { |
3794 | ||
3795 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
3796 | goto ok; | |
3797 | ||
eeebe20b | 3798 | gfc_find_symbol (current_ts.u.derived->name, |
3799 | current_ts.u.derived->ns->parent, 1, &sym); | |
4ee9c684 | 3800 | |
40cf8078 | 3801 | /* Any symbol that we find had better be a type definition |
1a9745d2 | 3802 | which has its components defined. */ |
40cf8078 | 3803 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
eeebe20b | 3804 | && (current_ts.u.derived->components != NULL |
3805 | || current_ts.u.derived->attr.zero_comp)) | |
4ee9c684 | 3806 | goto ok; |
3807 | ||
40cf8078 | 3808 | /* Now we have an error, which we signal, and then fix up |
3809 | because the knock-on is plain and simple confusing. */ | |
3810 | gfc_error_now ("Derived type at %C has not been previously defined " | |
1a9745d2 | 3811 | "and so cannot appear in a derived type definition"); |
40cf8078 | 3812 | current_attr.pointer = 1; |
3813 | goto ok; | |
4ee9c684 | 3814 | } |
3815 | ||
3816 | ok: | |
3817 | /* If we have an old-style character declaration, and no new-style | |
3818 | attribute specifications, then there a comma is optional between | |
3819 | the type specification and the variable list. */ | |
3820 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
3821 | gfc_match_char (','); | |
3822 | ||
3923b69f | 3823 | /* Give the types/attributes to symbols that follow. Give the element |
3824 | a number so that repeat character length expressions can be copied. */ | |
3825 | elem = 1; | |
4ee9c684 | 3826 | for (;;) |
3827 | { | |
c5d33754 | 3828 | num_idents_on_line++; |
3923b69f | 3829 | m = variable_decl (elem++); |
4ee9c684 | 3830 | if (m == MATCH_ERROR) |
3831 | goto cleanup; | |
3832 | if (m == MATCH_NO) | |
3833 | break; | |
3834 | ||
3835 | if (gfc_match_eos () == MATCH_YES) | |
3836 | goto cleanup; | |
3837 | if (gfc_match_char (',') != MATCH_YES) | |
3838 | break; | |
3839 | } | |
3840 | ||
8f0bdb23 | 3841 | if (gfc_error_flag_test () == 0) |
3842 | gfc_error ("Syntax error in data declaration at %C"); | |
4ee9c684 | 3843 | m = MATCH_ERROR; |
3844 | ||
af29c1f0 | 3845 | gfc_free_data_all (gfc_current_ns); |
3846 | ||
4ee9c684 | 3847 | cleanup: |
3848 | gfc_free_array_spec (current_as); | |
3849 | current_as = NULL; | |
3850 | return m; | |
3851 | } | |
3852 | ||
3853 | ||
3854 | /* Match a prefix associated with a function or subroutine | |
3855 | declaration. If the typespec pointer is nonnull, then a typespec | |
3856 | can be matched. Note that if nothing matches, MATCH_YES is | |
3857 | returned (the null string was matched). */ | |
3858 | ||
077932f9 | 3859 | match |
3860 | gfc_match_prefix (gfc_typespec *ts) | |
4ee9c684 | 3861 | { |
5b11d932 | 3862 | bool seen_type; |
4ee9c684 | 3863 | |
3864 | gfc_clear_attr (¤t_attr); | |
3865 | seen_type = 0; | |
3866 | ||
d1645c7b | 3867 | gcc_assert (!gfc_matching_prefix); |
3868 | gfc_matching_prefix = true; | |
40de255b | 3869 | |
4ee9c684 | 3870 | loop: |
3871 | if (!seen_type && ts != NULL | |
e8152f13 | 3872 | && gfc_match_decl_type_spec (ts, 0) == MATCH_YES |
4ee9c684 | 3873 | && gfc_match_space () == MATCH_YES) |
3874 | { | |
3875 | ||
3876 | seen_type = 1; | |
3877 | goto loop; | |
3878 | } | |
3879 | ||
3880 | if (gfc_match ("elemental% ") == MATCH_YES) | |
3881 | { | |
3882 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
40de255b | 3883 | goto error; |
4ee9c684 | 3884 | |
3885 | goto loop; | |
3886 | } | |
3887 | ||
3888 | if (gfc_match ("pure% ") == MATCH_YES) | |
3889 | { | |
3890 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
40de255b | 3891 | goto error; |
4ee9c684 | 3892 | |
3893 | goto loop; | |
3894 | } | |
3895 | ||
3896 | if (gfc_match ("recursive% ") == MATCH_YES) | |
3897 | { | |
3898 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
40de255b | 3899 | goto error; |
4ee9c684 | 3900 | |
3901 | goto loop; | |
3902 | } | |
3903 | ||
3904 | /* At this point, the next item is not a prefix. */ | |
d1645c7b | 3905 | gcc_assert (gfc_matching_prefix); |
3906 | gfc_matching_prefix = false; | |
4ee9c684 | 3907 | return MATCH_YES; |
40de255b | 3908 | |
3909 | error: | |
d1645c7b | 3910 | gcc_assert (gfc_matching_prefix); |
3911 | gfc_matching_prefix = false; | |
40de255b | 3912 | return MATCH_ERROR; |
4ee9c684 | 3913 | } |
3914 | ||
3915 | ||
077932f9 | 3916 | /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */ |
4ee9c684 | 3917 | |
f6bb8f4b | 3918 | static gfc_try |
1a9745d2 | 3919 | copy_prefix (symbol_attribute *dest, locus *where) |
4ee9c684 | 3920 | { |
4ee9c684 | 3921 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
3922 | return FAILURE; | |
3923 | ||
3924 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
3925 | return FAILURE; | |
3926 | ||
3927 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
3928 | return FAILURE; | |
3929 | ||
3930 | return SUCCESS; | |
3931 | } | |
3932 | ||
3933 | ||
3934 | /* Match a formal argument list. */ | |
3935 | ||
3936 | match | |
1a9745d2 | 3937 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
4ee9c684 | 3938 | { |
3939 | gfc_formal_arglist *head, *tail, *p, *q; | |
3940 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3941 | gfc_symbol *sym; | |
3942 | match m; | |
3943 | ||
3944 | head = tail = NULL; | |
3945 | ||
3946 | if (gfc_match_char ('(') != MATCH_YES) | |
3947 | { | |
3948 | if (null_flag) | |
3949 | goto ok; | |
3950 | return MATCH_NO; | |
3951 | } | |
3952 | ||
3953 | if (gfc_match_char (')') == MATCH_YES) | |
3954 | goto ok; | |
3955 | ||
3956 | for (;;) | |
3957 | { | |
3958 | if (gfc_match_char ('*') == MATCH_YES) | |
3959 | sym = NULL; | |
3960 | else | |
3961 | { | |
3962 | m = gfc_match_name (name); | |
3963 | if (m != MATCH_YES) | |
3964 | goto cleanup; | |
3965 | ||
3966 | if (gfc_get_symbol (name, NULL, &sym)) | |
3967 | goto cleanup; | |
3968 | } | |
3969 | ||
3970 | p = gfc_get_formal_arglist (); | |
3971 | ||
3972 | if (head == NULL) | |
3973 | head = tail = p; | |
3974 | else | |
3975 | { | |
3976 | tail->next = p; | |
3977 | tail = p; | |
3978 | } | |
3979 | ||
3980 | tail->sym = sym; | |
3981 | ||
3982 | /* We don't add the VARIABLE flavor because the name could be a | |
1a9745d2 | 3983 | dummy procedure. We don't apply these attributes to formal |
3984 | arguments of statement functions. */ | |
4ee9c684 | 3985 | if (sym != NULL && !st_flag |
950683ed | 3986 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
4ee9c684 | 3987 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
3988 | { | |
3989 | m = MATCH_ERROR; | |
3990 | goto cleanup; | |
3991 | } | |
3992 | ||
3993 | /* The name of a program unit can be in a different namespace, | |
1a9745d2 | 3994 | so check for it explicitly. After the statement is accepted, |
3995 | the name is checked for especially in gfc_get_symbol(). */ | |
4ee9c684 | 3996 | if (gfc_new_block != NULL && sym != NULL |
3997 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
3998 | { | |
3999 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
4000 | sym->name); | |
4001 | m = MATCH_ERROR; | |
4002 | goto cleanup; | |
4003 | } | |
4004 | ||
4005 | if (gfc_match_char (')') == MATCH_YES) | |
4006 | goto ok; | |
4007 | ||
4008 | m = gfc_match_char (','); | |
4009 | if (m != MATCH_YES) | |
4010 | { | |
4011 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
4012 | goto cleanup; | |
4013 | } | |
4014 | } | |
4015 | ||
4016 | ok: | |
4017 | /* Check for duplicate symbols in the formal argument list. */ | |
4018 | if (head != NULL) | |
4019 | { | |
4020 | for (p = head; p->next; p = p->next) | |
4021 | { | |
4022 | if (p->sym == NULL) | |
4023 | continue; | |
4024 | ||
4025 | for (q = p->next; q; q = q->next) | |
4026 | if (p->sym == q->sym) | |
4027 | { | |
1a9745d2 | 4028 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
4029 | "at %C", p->sym->name); | |
4ee9c684 | 4030 | |
4031 | m = MATCH_ERROR; | |
4032 | goto cleanup; | |
4033 | } | |
4034 | } | |
4035 | } | |
4036 | ||
f6d0e37a | 4037 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) |
4038 | == FAILURE) | |
4ee9c684 | 4039 | { |
4040 | m = MATCH_ERROR; | |
4041 | goto cleanup; | |
4042 | } | |
4043 | ||
4044 | return MATCH_YES; | |
4045 | ||
4046 | cleanup: | |
4047 | gfc_free_formal_arglist (head); | |
4048 | return m; | |
4049 | } | |
4050 | ||
4051 | ||
4052 | /* Match a RESULT specification following a function declaration or | |
4053 | ENTRY statement. Also matches the end-of-statement. */ | |
4054 | ||
4055 | static match | |
f6d0e37a | 4056 | match_result (gfc_symbol *function, gfc_symbol **result) |
4ee9c684 | 4057 | { |
4058 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4059 | gfc_symbol *r; | |
4060 | match m; | |
4061 | ||
4062 | if (gfc_match (" result (") != MATCH_YES) | |
4063 | return MATCH_NO; | |
4064 | ||
4065 | m = gfc_match_name (name); | |
4066 | if (m != MATCH_YES) | |
4067 | return m; | |
4068 | ||
c5d33754 | 4069 | /* Get the right paren, and that's it because there could be the |
4070 | bind(c) attribute after the result clause. */ | |
4071 | if (gfc_match_char(')') != MATCH_YES) | |
4ee9c684 | 4072 | { |
c5d33754 | 4073 | /* TODO: should report the missing right paren here. */ |
4ee9c684 | 4074 | return MATCH_ERROR; |
4075 | } | |
4076 | ||
4077 | if (strcmp (function->name, name) == 0) | |
4078 | { | |
1a9745d2 | 4079 | gfc_error ("RESULT variable at %C must be different than function name"); |
4ee9c684 | 4080 | return MATCH_ERROR; |
4081 | } | |
4082 | ||
4083 | if (gfc_get_symbol (name, NULL, &r)) | |
4084 | return MATCH_ERROR; | |
4085 | ||
f6d3042b | 4086 | if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE) |
4ee9c684 | 4087 | return MATCH_ERROR; |
4088 | ||
4089 | *result = r; | |
4090 | ||
4091 | return MATCH_YES; | |
4092 | } | |
4093 | ||
4094 | ||
c5d33754 | 4095 | /* Match a function suffix, which could be a combination of a result |
4096 | clause and BIND(C), either one, or neither. The draft does not | |
4097 | require them to come in a specific order. */ | |
4098 | ||
4099 | match | |
4100 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) | |
4101 | { | |
4102 | match is_bind_c; /* Found bind(c). */ | |
4103 | match is_result; /* Found result clause. */ | |
4104 | match found_match; /* Status of whether we've found a good match. */ | |
e0be6f02 | 4105 | char peek_char; /* Character we're going to peek at. */ |
75ae7f6c | 4106 | bool allow_binding_name; |
c5d33754 | 4107 | |
4108 | /* Initialize to having found nothing. */ | |
4109 | found_match = MATCH_NO; | |
4110 | is_bind_c = MATCH_NO; | |
4111 | is_result = MATCH_NO; | |
4112 | ||
4113 | /* Get the next char to narrow between result and bind(c). */ | |
4114 | gfc_gobble_whitespace (); | |
e0be6f02 | 4115 | peek_char = gfc_peek_ascii_char (); |
c5d33754 | 4116 | |
75ae7f6c | 4117 | /* C binding names are not allowed for internal procedures. */ |
4118 | if (gfc_current_state () == COMP_CONTAINS | |
4119 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
4120 | allow_binding_name = false; | |
4121 | else | |
4122 | allow_binding_name = true; | |
4123 | ||
c5d33754 | 4124 | switch (peek_char) |
4125 | { | |
4126 | case 'r': | |
4127 | /* Look for result clause. */ | |
4128 | is_result = match_result (sym, result); | |
4129 | if (is_result == MATCH_YES) | |
4130 | { | |
4131 | /* Now see if there is a bind(c) after it. */ | |
75ae7f6c | 4132 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 4133 | /* We've found the result clause and possibly bind(c). */ |
4134 | found_match = MATCH_YES; | |
4135 | } | |
4136 | else | |
4137 | /* This should only be MATCH_ERROR. */ | |
4138 | found_match = is_result; | |
4139 | break; | |
4140 | case 'b': | |
4141 | /* Look for bind(c) first. */ | |
75ae7f6c | 4142 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 4143 | if (is_bind_c == MATCH_YES) |
4144 | { | |
4145 | /* Now see if a result clause followed it. */ | |
4146 | is_result = match_result (sym, result); | |
4147 | found_match = MATCH_YES; | |
4148 | } | |
4149 | else | |
4150 | { | |
4151 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ | |
4152 | found_match = MATCH_ERROR; | |
4153 | } | |
4154 | break; | |
4155 | default: | |
4156 | gfc_error ("Unexpected junk after function declaration at %C"); | |
4157 | found_match = MATCH_ERROR; | |
4158 | break; | |
4159 | } | |
4160 | ||
c5d33754 | 4161 | if (is_bind_c == MATCH_YES) |
4518e961 | 4162 | { |
75ae7f6c | 4163 | /* Fortran 2008 draft allows BIND(C) for internal procedures. */ |
4518e961 | 4164 | if (gfc_current_state () == COMP_CONTAINS |
75ae7f6c | 4165 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
2dcae6c7 | 4166 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
4167 | "at %L may not be specified for an internal " | |
4168 | "procedure", &gfc_current_locus) | |
75ae7f6c | 4169 | == FAILURE) |
4170 | return MATCH_ERROR; | |
4171 | ||
4518e961 | 4172 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) |
4173 | == FAILURE) | |
4174 | return MATCH_ERROR; | |
4175 | } | |
c5d33754 | 4176 | |
4177 | return found_match; | |
4178 | } | |
4179 | ||
4180 | ||
1e057e9b | 4181 | /* Procedure pointer return value without RESULT statement: |
4182 | Add "hidden" result variable named "ppr@". */ | |
4183 | ||
4184 | static gfc_try | |
4185 | add_hidden_procptr_result (gfc_symbol *sym) | |
4186 | { | |
4187 | bool case1,case2; | |
4188 | ||
4189 | if (gfc_notification_std (GFC_STD_F2003) == ERROR) | |
4190 | return FAILURE; | |
4191 | ||
4192 | /* First usage case: PROCEDURE and EXTERNAL statements. */ | |
4193 | case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block () | |
4194 | && strcmp (gfc_current_block ()->name, sym->name) == 0 | |
4195 | && sym->attr.external; | |
4196 | /* Second usage case: INTERFACE statements. */ | |
4197 | case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous | |
4198 | && gfc_state_stack->previous->state == COMP_FUNCTION | |
4199 | && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0; | |
4200 | ||
4201 | if (case1 || case2) | |
4202 | { | |
4203 | gfc_symtree *stree; | |
4204 | if (case1) | |
36b0a1b0 | 4205 | gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false); |
1e057e9b | 4206 | else if (case2) |
180a5dc0 | 4207 | { |
4208 | gfc_symtree *st2; | |
36b0a1b0 | 4209 | gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false); |
180a5dc0 | 4210 | st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@"); |
4211 | st2->n.sym = stree->n.sym; | |
4212 | } | |
1e057e9b | 4213 | sym->result = stree->n.sym; |
4214 | ||
4215 | sym->result->attr.proc_pointer = sym->attr.proc_pointer; | |
4216 | sym->result->attr.pointer = sym->attr.pointer; | |
4217 | sym->result->attr.external = sym->attr.external; | |
4218 | sym->result->attr.referenced = sym->attr.referenced; | |
e40ac2fe | 4219 | sym->result->ts = sym->ts; |
1e057e9b | 4220 | sym->attr.proc_pointer = 0; |
4221 | sym->attr.pointer = 0; | |
4222 | sym->attr.external = 0; | |
4223 | if (sym->result->attr.external && sym->result->attr.pointer) | |
4224 | { | |
4225 | sym->result->attr.pointer = 0; | |
4226 | sym->result->attr.proc_pointer = 1; | |
4227 | } | |
4228 | ||
4229 | return gfc_add_result (&sym->result->attr, sym->result->name, NULL); | |
4230 | } | |
4231 | /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */ | |
4232 | else if (sym->attr.function && !sym->attr.external && sym->attr.pointer | |
4233 | && sym->result && sym->result != sym && sym->result->attr.external | |
4234 | && sym == gfc_current_ns->proc_name | |
4235 | && sym == sym->result->ns->proc_name | |
4236 | && strcmp ("ppr@", sym->result->name) == 0) | |
4237 | { | |
4238 | sym->result->attr.proc_pointer = 1; | |
4239 | sym->attr.pointer = 0; | |
4240 | return SUCCESS; | |
4241 | } | |
4242 | else | |
4243 | return FAILURE; | |
4244 | } | |
4245 | ||
4246 | ||
64e93293 | 4247 | /* Match the interface for a PROCEDURE declaration, |
4248 | including brackets (R1212). */ | |
af1a34ee | 4249 | |
4250 | static match | |
64e93293 | 4251 | match_procedure_interface (gfc_symbol **proc_if) |
af1a34ee | 4252 | { |
4253 | match m; | |
1eb2b542 | 4254 | gfc_symtree *st; |
af1a34ee | 4255 | locus old_loc, entry_loc; |
1eb2b542 | 4256 | gfc_namespace *old_ns = gfc_current_ns; |
4257 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
af1a34ee | 4258 | |
1eb2b542 | 4259 | old_loc = entry_loc = gfc_current_locus; |
af1a34ee | 4260 | gfc_clear_ts (¤t_ts); |
4261 | ||
4262 | if (gfc_match (" (") != MATCH_YES) | |
4263 | { | |
4264 | gfc_current_locus = entry_loc; | |
4265 | return MATCH_NO; | |
4266 | } | |
4267 | ||
4268 | /* Get the type spec. for the procedure interface. */ | |
4269 | old_loc = gfc_current_locus; | |
e8152f13 | 4270 | m = gfc_match_decl_type_spec (¤t_ts, 0); |
fd1277c3 | 4271 | gfc_gobble_whitespace (); |
e0be6f02 | 4272 | if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')')) |
af1a34ee | 4273 | goto got_ts; |
4274 | ||
4275 | if (m == MATCH_ERROR) | |
4276 | return m; | |
4277 | ||
1eb2b542 | 4278 | /* Procedure interface is itself a procedure. */ |
af1a34ee | 4279 | gfc_current_locus = old_loc; |
1eb2b542 | 4280 | m = gfc_match_name (name); |
af1a34ee | 4281 | |
1eb2b542 | 4282 | /* First look to see if it is already accessible in the current |
4283 | namespace because it is use associated or contained. */ | |
4284 | st = NULL; | |
4285 | if (gfc_find_sym_tree (name, NULL, 0, &st)) | |
4286 | return MATCH_ERROR; | |
4287 | ||
4288 | /* If it is still not found, then try the parent namespace, if it | |
4289 | exists and create the symbol there if it is still not found. */ | |
4290 | if (gfc_current_ns->parent) | |
4291 | gfc_current_ns = gfc_current_ns->parent; | |
4292 | if (st == NULL && gfc_get_ha_sym_tree (name, &st)) | |
4293 | return MATCH_ERROR; | |
4294 | ||
4295 | gfc_current_ns = old_ns; | |
4296 | *proc_if = st->n.sym; | |
af1a34ee | 4297 | |
4298 | /* Various interface checks. */ | |
64e93293 | 4299 | if (*proc_if) |
af1a34ee | 4300 | { |
64e93293 | 4301 | (*proc_if)->refs++; |
74113644 | 4302 | /* Resolve interface if possible. That way, attr.procedure is only set |
4303 | if it is declared by a later procedure-declaration-stmt, which is | |
4304 | invalid per C1212. */ | |
64e93293 | 4305 | while ((*proc_if)->ts.interface) |
4306 | *proc_if = (*proc_if)->ts.interface; | |
74113644 | 4307 | |
64e93293 | 4308 | if ((*proc_if)->generic) |
af1a34ee | 4309 | { |
64e93293 | 4310 | gfc_error ("Interface '%s' at %C may not be generic", |
4311 | (*proc_if)->name); | |
af1a34ee | 4312 | return MATCH_ERROR; |
4313 | } | |
64e93293 | 4314 | if ((*proc_if)->attr.proc == PROC_ST_FUNCTION) |
af1a34ee | 4315 | { |
4316 | gfc_error ("Interface '%s' at %C may not be a statement function", | |
64e93293 | 4317 | (*proc_if)->name); |
af1a34ee | 4318 | return MATCH_ERROR; |
4319 | } | |
4320 | /* Handle intrinsic procedures. */ | |
64e93293 | 4321 | if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc |
4322 | || (*proc_if)->attr.if_source == IFSRC_IFBODY) | |
4323 | && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus) | |
4324 | || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus))) | |
4325 | (*proc_if)->attr.intrinsic = 1; | |
4326 | if ((*proc_if)->attr.intrinsic | |
4327 | && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0)) | |
af1a34ee | 4328 | { |
4329 | gfc_error ("Intrinsic procedure '%s' not allowed " | |
64e93293 | 4330 | "in PROCEDURE statement at %C", (*proc_if)->name); |
af1a34ee | 4331 | return MATCH_ERROR; |
4332 | } | |
af1a34ee | 4333 | } |
4334 | ||
4335 | got_ts: | |
af1a34ee | 4336 | if (gfc_match (" )") != MATCH_YES) |
4337 | { | |
4338 | gfc_current_locus = entry_loc; | |
4339 | return MATCH_NO; | |
4340 | } | |
4341 | ||
64e93293 | 4342 | return MATCH_YES; |
4343 | } | |
4344 | ||
4345 | ||
4346 | /* Match a PROCEDURE declaration (R1211). */ | |
4347 | ||
4348 | static match | |
4349 | match_procedure_decl (void) | |
4350 | { | |
4351 | match m; | |
4352 | gfc_symbol *sym, *proc_if = NULL; | |
4353 | int num; | |
4354 | gfc_expr *initializer = NULL; | |
4355 | ||
4356 | /* Parse interface (with brackets). */ | |
4357 | m = match_procedure_interface (&proc_if); | |
4358 | if (m != MATCH_YES) | |
4359 | return m; | |
4360 | ||
4361 | /* Parse attributes (with colons). */ | |
af1a34ee | 4362 | m = match_attr_spec(); |
4363 | if (m == MATCH_ERROR) | |
4364 | return MATCH_ERROR; | |
4365 | ||
4366 | /* Get procedure symbols. */ | |
4367 | for(num=1;;num++) | |
4368 | { | |
af1a34ee | 4369 | m = gfc_match_symbol (&sym, 0); |
4370 | if (m == MATCH_NO) | |
4371 | goto syntax; | |
4372 | else if (m == MATCH_ERROR) | |
4373 | return m; | |
4374 | ||
4375 | /* Add current_attr to the symbol attributes. */ | |
4376 | if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
4377 | return MATCH_ERROR; | |
4378 | ||
4379 | if (sym->attr.is_bind_c) | |
4380 | { | |
4381 | /* Check for C1218. */ | |
4382 | if (!proc_if || !proc_if->attr.is_bind_c) | |
4383 | { | |
4384 | gfc_error ("BIND(C) attribute at %C requires " | |
4385 | "an interface with BIND(C)"); | |
4386 | return MATCH_ERROR; | |
4387 | } | |
4388 | /* Check for C1217. */ | |
4389 | if (has_name_equals && sym->attr.pointer) | |
4390 | { | |
4391 | gfc_error ("BIND(C) procedure with NAME may not have " | |
4392 | "POINTER attribute at %C"); | |
4393 | return MATCH_ERROR; | |
4394 | } | |
4395 | if (has_name_equals && sym->attr.dummy) | |
4396 | { | |
4397 | gfc_error ("Dummy procedure at %C may not have " | |
4398 | "BIND(C) attribute with NAME"); | |
4399 | return MATCH_ERROR; | |
4400 | } | |
4401 | /* Set binding label for BIND(C). */ | |
4402 | if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS) | |
4403 | return MATCH_ERROR; | |
4404 | } | |
4405 | ||
cad0ddcf | 4406 | if (gfc_add_external (&sym->attr, NULL) == FAILURE) |
af1a34ee | 4407 | return MATCH_ERROR; |
1e057e9b | 4408 | |
4409 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4410 | sym = sym->result; | |
4411 | ||
af1a34ee | 4412 | if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE) |
4413 | return MATCH_ERROR; | |
4414 | ||
4415 | /* Set interface. */ | |
4416 | if (proc_if != NULL) | |
f7d7a083 | 4417 | { |
13a834aa | 4418 | if (sym->ts.type != BT_UNKNOWN) |
4419 | { | |
4420 | gfc_error ("Procedure '%s' at %L already has basic type of %s", | |
4421 | sym->name, &gfc_current_locus, | |
4422 | gfc_basic_typename (sym->ts.type)); | |
4423 | return MATCH_ERROR; | |
4424 | } | |
2cd2bb5c | 4425 | sym->ts.interface = proc_if; |
f7d7a083 | 4426 | sym->attr.untyped = 1; |
180a5dc0 | 4427 | sym->attr.if_source = IFSRC_IFBODY; |
f7d7a083 | 4428 | } |
af1a34ee | 4429 | else if (current_ts.type != BT_UNKNOWN) |
4430 | { | |
13a834aa | 4431 | if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) |
4432 | return MATCH_ERROR; | |
2cd2bb5c | 4433 | sym->ts.interface = gfc_new_symbol ("", gfc_current_ns); |
4434 | sym->ts.interface->ts = current_ts; | |
4435 | sym->ts.interface->attr.function = 1; | |
4436 | sym->attr.function = sym->ts.interface->attr.function; | |
180a5dc0 | 4437 | sym->attr.if_source = IFSRC_UNKNOWN; |
af1a34ee | 4438 | } |
4439 | ||
cad0ddcf | 4440 | if (gfc_match (" =>") == MATCH_YES) |
4441 | { | |
4442 | if (!current_attr.pointer) | |
4443 | { | |
4444 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
4445 | m = MATCH_ERROR; | |
4446 | goto cleanup; | |
4447 | } | |
4448 | ||
4449 | m = gfc_match_null (&initializer); | |
4450 | if (m == MATCH_NO) | |
4451 | { | |
4452 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4453 | m = MATCH_ERROR; | |
4454 | } | |
4455 | ||
4456 | if (gfc_pure (NULL)) | |
4457 | { | |
4458 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4459 | "a PURE procedure"); | |
4460 | m = MATCH_ERROR; | |
4461 | } | |
4462 | ||
4463 | if (m != MATCH_YES) | |
4464 | goto cleanup; | |
4465 | ||
4466 | if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus) | |
4467 | != SUCCESS) | |
4468 | goto cleanup; | |
4469 | ||
4470 | } | |
4471 | ||
4472 | gfc_set_sym_referenced (sym); | |
4473 | ||
af1a34ee | 4474 | if (gfc_match_eos () == MATCH_YES) |
4475 | return MATCH_YES; | |
4476 | if (gfc_match_char (',') != MATCH_YES) | |
4477 | goto syntax; | |
4478 | } | |
4479 | ||
4480 | syntax: | |
4481 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4482 | return MATCH_ERROR; | |
cad0ddcf | 4483 | |
4484 | cleanup: | |
4485 | /* Free stuff up and return. */ | |
4486 | gfc_free_expr (initializer); | |
4487 | return m; | |
af1a34ee | 4488 | } |
4489 | ||
4490 | ||
64e93293 | 4491 | static match |
4492 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc); | |
4493 | ||
4494 | ||
4495 | /* Match a procedure pointer component declaration (R445). */ | |
4496 | ||
4497 | static match | |
4498 | match_ppc_decl (void) | |
4499 | { | |
4500 | match m; | |
4501 | gfc_symbol *proc_if = NULL; | |
4502 | gfc_typespec ts; | |
4503 | int num; | |
4504 | gfc_component *c; | |
4505 | gfc_expr *initializer = NULL; | |
4506 | gfc_typebound_proc* tb; | |
4507 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4508 | ||
4509 | /* Parse interface (with brackets). */ | |
4510 | m = match_procedure_interface (&proc_if); | |
4511 | if (m != MATCH_YES) | |
4512 | goto syntax; | |
4513 | ||
4514 | /* Parse attributes. */ | |
4515 | tb = XCNEW (gfc_typebound_proc); | |
4516 | tb->where = gfc_current_locus; | |
4517 | m = match_binding_attributes (tb, false, true); | |
4518 | if (m == MATCH_ERROR) | |
4519 | return m; | |
4520 | ||
64e93293 | 4521 | gfc_clear_attr (¤t_attr); |
4522 | current_attr.procedure = 1; | |
4523 | current_attr.proc_pointer = 1; | |
4524 | current_attr.access = tb->access; | |
4525 | current_attr.flavor = FL_PROCEDURE; | |
4526 | ||
4527 | /* Match the colons (required). */ | |
4528 | if (gfc_match (" ::") != MATCH_YES) | |
4529 | { | |
4530 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
4531 | return MATCH_ERROR; | |
4532 | } | |
4533 | ||
4534 | /* Check for C450. */ | |
4535 | if (!tb->nopass && proc_if == NULL) | |
4536 | { | |
4537 | gfc_error("NOPASS or explicit interface required at %C"); | |
4538 | return MATCH_ERROR; | |
4539 | } | |
4540 | ||
8a026279 | 4541 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Procedure pointer " |
4542 | "component at %C") == FAILURE) | |
4543 | return MATCH_ERROR; | |
4544 | ||
64e93293 | 4545 | /* Match PPC names. */ |
4546 | ts = current_ts; | |
4547 | for(num=1;;num++) | |
4548 | { | |
4549 | m = gfc_match_name (name); | |
4550 | if (m == MATCH_NO) | |
4551 | goto syntax; | |
4552 | else if (m == MATCH_ERROR) | |
4553 | return m; | |
4554 | ||
4555 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
4556 | return MATCH_ERROR; | |
4557 | ||
4558 | /* Add current_attr to the symbol attributes. */ | |
4559 | if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE) | |
4560 | return MATCH_ERROR; | |
4561 | ||
4562 | if (gfc_add_external (&c->attr, NULL) == FAILURE) | |
4563 | return MATCH_ERROR; | |
4564 | ||
4565 | if (gfc_add_proc (&c->attr, name, NULL) == FAILURE) | |
4566 | return MATCH_ERROR; | |
4567 | ||
fe9b08a2 | 4568 | c->tb = tb; |
4569 | ||
64e93293 | 4570 | /* Set interface. */ |
4571 | if (proc_if != NULL) | |
4572 | { | |
4573 | c->ts.interface = proc_if; | |
4574 | c->attr.untyped = 1; | |
4575 | c->attr.if_source = IFSRC_IFBODY; | |
4576 | } | |
4577 | else if (ts.type != BT_UNKNOWN) | |
4578 | { | |
4579 | c->ts = ts; | |
4580 | c->ts.interface = gfc_new_symbol ("", gfc_current_ns); | |
4581 | c->ts.interface->ts = ts; | |
4582 | c->ts.interface->attr.function = 1; | |
4583 | c->attr.function = c->ts.interface->attr.function; | |
4584 | c->attr.if_source = IFSRC_UNKNOWN; | |
4585 | } | |
4586 | ||
4587 | if (gfc_match (" =>") == MATCH_YES) | |
4588 | { | |
4589 | m = gfc_match_null (&initializer); | |
4590 | if (m == MATCH_NO) | |
4591 | { | |
4592 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4593 | m = MATCH_ERROR; | |
4594 | } | |
4595 | if (gfc_pure (NULL)) | |
4596 | { | |
4597 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4598 | "a PURE procedure"); | |
4599 | m = MATCH_ERROR; | |
4600 | } | |
4601 | if (m != MATCH_YES) | |
4602 | { | |
4603 | gfc_free_expr (initializer); | |
4604 | return m; | |
4605 | } | |
4606 | c->initializer = initializer; | |
4607 | } | |
4608 | ||
4609 | if (gfc_match_eos () == MATCH_YES) | |
4610 | return MATCH_YES; | |
4611 | if (gfc_match_char (',') != MATCH_YES) | |
4612 | goto syntax; | |
4613 | } | |
4614 | ||
4615 | syntax: | |
4616 | gfc_error ("Syntax error in procedure pointer component at %C"); | |
4617 | return MATCH_ERROR; | |
4618 | } | |
4619 | ||
4620 | ||
af1a34ee | 4621 | /* Match a PROCEDURE declaration inside an interface (R1206). */ |
4622 | ||
4623 | static match | |
4624 | match_procedure_in_interface (void) | |
4625 | { | |
4626 | match m; | |
4627 | gfc_symbol *sym; | |
4628 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4629 | ||
4630 | if (current_interface.type == INTERFACE_NAMELESS | |
4631 | || current_interface.type == INTERFACE_ABSTRACT) | |
4632 | { | |
4633 | gfc_error ("PROCEDURE at %C must be in a generic interface"); | |
4634 | return MATCH_ERROR; | |
4635 | } | |
4636 | ||
4637 | for(;;) | |
4638 | { | |
4639 | m = gfc_match_name (name); | |
4640 | if (m == MATCH_NO) | |
4641 | goto syntax; | |
4642 | else if (m == MATCH_ERROR) | |
4643 | return m; | |
4644 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
4645 | return MATCH_ERROR; | |
4646 | ||
4647 | if (gfc_add_interface (sym) == FAILURE) | |
4648 | return MATCH_ERROR; | |
4649 | ||
af1a34ee | 4650 | if (gfc_match_eos () == MATCH_YES) |
4651 | break; | |
4652 | if (gfc_match_char (',') != MATCH_YES) | |
4653 | goto syntax; | |
4654 | } | |
4655 | ||
4656 | return MATCH_YES; | |
4657 | ||
4658 | syntax: | |
4659 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4660 | return MATCH_ERROR; | |
4661 | } | |
4662 | ||
4663 | ||
4664 | /* General matcher for PROCEDURE declarations. */ | |
4665 | ||
7fd88f6e | 4666 | static match match_procedure_in_type (void); |
4667 | ||
af1a34ee | 4668 | match |
4669 | gfc_match_procedure (void) | |
4670 | { | |
4671 | match m; | |
4672 | ||
4673 | switch (gfc_current_state ()) | |
4674 | { | |
4675 | case COMP_NONE: | |
4676 | case COMP_PROGRAM: | |
4677 | case COMP_MODULE: | |
4678 | case COMP_SUBROUTINE: | |
4679 | case COMP_FUNCTION: | |
4680 | m = match_procedure_decl (); | |
4681 | break; | |
4682 | case COMP_INTERFACE: | |
4683 | m = match_procedure_in_interface (); | |
4684 | break; | |
4685 | case COMP_DERIVED: | |
64e93293 | 4686 | m = match_ppc_decl (); |
4687 | break; | |
7fd88f6e | 4688 | case COMP_DERIVED_CONTAINS: |
4689 | m = match_procedure_in_type (); | |
4690 | break; | |
af1a34ee | 4691 | default: |
4692 | return MATCH_NO; | |
4693 | } | |
4694 | ||
4695 | if (m != MATCH_YES) | |
4696 | return m; | |
4697 | ||
4698 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C") | |
4699 | == FAILURE) | |
4700 | return MATCH_ERROR; | |
4701 | ||
4702 | return m; | |
4703 | } | |
4704 | ||
4705 | ||
a34926ba | 4706 | /* Warn if a matched procedure has the same name as an intrinsic; this is |
4707 | simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current | |
4708 | parser-state-stack to find out whether we're in a module. */ | |
4709 | ||
4710 | static void | |
4711 | warn_intrinsic_shadow (const gfc_symbol* sym, bool func) | |
4712 | { | |
4713 | bool in_module; | |
4714 | ||
4715 | in_module = (gfc_state_stack->previous | |
4716 | && gfc_state_stack->previous->state == COMP_MODULE); | |
4717 | ||
4718 | gfc_warn_intrinsic_shadow (sym, in_module, func); | |
4719 | } | |
4720 | ||
4721 | ||
4ee9c684 | 4722 | /* Match a function declaration. */ |
4723 | ||
4724 | match | |
4725 | gfc_match_function_decl (void) | |
4726 | { | |
4727 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4728 | gfc_symbol *sym, *result; | |
4729 | locus old_loc; | |
4730 | match m; | |
c5d33754 | 4731 | match suffix_match; |
4732 | match found_match; /* Status returned by match func. */ | |
4ee9c684 | 4733 | |
4734 | if (gfc_current_state () != COMP_NONE | |
4735 | && gfc_current_state () != COMP_INTERFACE | |
4736 | && gfc_current_state () != COMP_CONTAINS) | |
4737 | return MATCH_NO; | |
4738 | ||
4739 | gfc_clear_ts (¤t_ts); | |
4740 | ||
cbb9e6aa | 4741 | old_loc = gfc_current_locus; |
4ee9c684 | 4742 | |
077932f9 | 4743 | m = gfc_match_prefix (¤t_ts); |
4ee9c684 | 4744 | if (m != MATCH_YES) |
4745 | { | |
cbb9e6aa | 4746 | gfc_current_locus = old_loc; |
4ee9c684 | 4747 | return m; |
4748 | } | |
4749 | ||
4750 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
4751 | { | |
cbb9e6aa | 4752 | gfc_current_locus = old_loc; |
4ee9c684 | 4753 | return MATCH_NO; |
4754 | } | |
d77f260f | 4755 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 4756 | return MATCH_ERROR; |
1e057e9b | 4757 | |
4758 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4759 | sym = sym->result; | |
4760 | ||
4ee9c684 | 4761 | gfc_new_block = sym; |
4762 | ||
4763 | m = gfc_match_formal_arglist (sym, 0, 0); | |
4764 | if (m == MATCH_NO) | |
9b435b6d | 4765 | { |
4766 | gfc_error ("Expected formal argument list in function " | |
1a9745d2 | 4767 | "definition at %C"); |
9b435b6d | 4768 | m = MATCH_ERROR; |
4769 | goto cleanup; | |
4770 | } | |
4ee9c684 | 4771 | else if (m == MATCH_ERROR) |
4772 | goto cleanup; | |
4773 | ||
4774 | result = NULL; | |
4775 | ||
c5d33754 | 4776 | /* According to the draft, the bind(c) and result clause can |
4777 | come in either order after the formal_arg_list (i.e., either | |
4778 | can be first, both can exist together or by themselves or neither | |
4779 | one). Therefore, the match_result can't match the end of the | |
4780 | string, and check for the bind(c) or result clause in either order. */ | |
4781 | found_match = gfc_match_eos (); | |
4782 | ||
4783 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
4784 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4785 | not allowed for procedures. */ | |
4786 | if (sym->attr.is_bind_c == 1) | |
4787 | { | |
4788 | sym->attr.is_bind_c = 0; | |
4789 | if (sym->old_symbol != NULL) | |
4790 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4791 | "variables or common blocks", | |
4792 | &(sym->old_symbol->declared_at)); | |
4793 | else | |
4794 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4795 | "variables or common blocks", &gfc_current_locus); | |
4ee9c684 | 4796 | } |
4797 | ||
c5d33754 | 4798 | if (found_match != MATCH_YES) |
4ee9c684 | 4799 | { |
c5d33754 | 4800 | /* If we haven't found the end-of-statement, look for a suffix. */ |
4801 | suffix_match = gfc_match_suffix (sym, &result); | |
4802 | if (suffix_match == MATCH_YES) | |
4803 | /* Need to get the eos now. */ | |
4804 | found_match = gfc_match_eos (); | |
4805 | else | |
4806 | found_match = suffix_match; | |
4ee9c684 | 4807 | } |
4808 | ||
c5d33754 | 4809 | if(found_match != MATCH_YES) |
4810 | m = MATCH_ERROR; | |
4ee9c684 | 4811 | else |
4812 | { | |
c5d33754 | 4813 | /* Make changes to the symbol. */ |
4814 | m = MATCH_ERROR; | |
4815 | ||
4816 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) | |
4817 | goto cleanup; | |
4818 | ||
4819 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
4820 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4821 | goto cleanup; | |
4ee9c684 | 4822 | |
8d39570e | 4823 | /* Delay matching the function characteristics until after the |
077932f9 | 4824 | specification block by signalling kind=-1. */ |
8d39570e | 4825 | sym->declared_at = old_loc; |
4826 | if (current_ts.type != BT_UNKNOWN) | |
4827 | current_ts.kind = -1; | |
4828 | else | |
4829 | current_ts.kind = 0; | |
077932f9 | 4830 | |
c5d33754 | 4831 | if (result == NULL) |
4832 | { | |
0477d42d | 4833 | if (current_ts.type != BT_UNKNOWN |
4834 | && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) | |
4835 | goto cleanup; | |
c5d33754 | 4836 | sym->result = sym; |
4837 | } | |
4838 | else | |
4839 | { | |
0477d42d | 4840 | if (current_ts.type != BT_UNKNOWN |
4841 | && gfc_add_type (result, ¤t_ts, &gfc_current_locus) | |
4842 | == FAILURE) | |
4843 | goto cleanup; | |
c5d33754 | 4844 | sym->result = result; |
4845 | } | |
4846 | ||
a34926ba | 4847 | /* Warn if this procedure has the same name as an intrinsic. */ |
4848 | warn_intrinsic_shadow (sym, true); | |
4849 | ||
c5d33754 | 4850 | return MATCH_YES; |
4851 | } | |
4ee9c684 | 4852 | |
4853 | cleanup: | |
cbb9e6aa | 4854 | gfc_current_locus = old_loc; |
4ee9c684 | 4855 | return m; |
4856 | } | |
4857 | ||
1a9745d2 | 4858 | |
4859 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
4860 | pass the name of the entry, rather than the gfc_current_block name, and | |
4861 | to return false upon finding an existing global entry. */ | |
858f9894 | 4862 | |
4863 | static bool | |
1a9745d2 | 4864 | add_global_entry (const char *name, int sub) |
858f9894 | 4865 | { |
4866 | gfc_gsymbol *s; | |
8458f4ca | 4867 | enum gfc_symbol_type type; |
858f9894 | 4868 | |
4869 | s = gfc_get_gsymbol(name); | |
5b11d932 | 4870 | type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; |
858f9894 | 4871 | |
4872 | if (s->defined | |
1a9745d2 | 4873 | || (s->type != GSYM_UNKNOWN |
5b11d932 | 4874 | && s->type != type)) |
cbbac028 | 4875 | gfc_global_used(s, NULL); |
858f9894 | 4876 | else |
4877 | { | |
5b11d932 | 4878 | s->type = type; |
858f9894 | 4879 | s->where = gfc_current_locus; |
4880 | s->defined = 1; | |
83aeedb9 | 4881 | s->ns = gfc_current_ns; |
858f9894 | 4882 | return true; |
4883 | } | |
4884 | return false; | |
4885 | } | |
4ee9c684 | 4886 | |
1a9745d2 | 4887 | |
4ee9c684 | 4888 | /* Match an ENTRY statement. */ |
4889 | ||
4890 | match | |
4891 | gfc_match_entry (void) | |
4892 | { | |
1b716045 | 4893 | gfc_symbol *proc; |
4894 | gfc_symbol *result; | |
4895 | gfc_symbol *entry; | |
4ee9c684 | 4896 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
4897 | gfc_compile_state state; | |
4898 | match m; | |
1b716045 | 4899 | gfc_entry_list *el; |
7b5e1acc | 4900 | locus old_loc; |
d77f260f | 4901 | bool module_procedure; |
86f0974b | 4902 | char peek_char; |
4903 | match is_bind_c; | |
4ee9c684 | 4904 | |
4905 | m = gfc_match_name (name); | |
4906 | if (m != MATCH_YES) | |
4907 | return m; | |
4908 | ||
1b716045 | 4909 | state = gfc_current_state (); |
ea37f786 | 4910 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
1b716045 | 4911 | { |
ea37f786 | 4912 | switch (state) |
4913 | { | |
4914 | case COMP_PROGRAM: | |
4915 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
4916 | break; | |
4917 | case COMP_MODULE: | |
4918 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
4919 | break; | |
4920 | case COMP_BLOCK_DATA: | |
1a9745d2 | 4921 | gfc_error ("ENTRY statement at %C cannot appear within " |
4922 | "a BLOCK DATA"); | |
ea37f786 | 4923 | break; |
4924 | case COMP_INTERFACE: | |
1a9745d2 | 4925 | gfc_error ("ENTRY statement at %C cannot appear within " |
4926 | "an INTERFACE"); | |
ea37f786 | 4927 | break; |
4928 | case COMP_DERIVED: | |
1a9745d2 | 4929 | gfc_error ("ENTRY statement at %C cannot appear within " |
4930 | "a DERIVED TYPE block"); | |
ea37f786 | 4931 | break; |
4932 | case COMP_IF: | |
1a9745d2 | 4933 | gfc_error ("ENTRY statement at %C cannot appear within " |
4934 | "an IF-THEN block"); | |
ea37f786 | 4935 | break; |
4936 | case COMP_DO: | |
1a9745d2 | 4937 | gfc_error ("ENTRY statement at %C cannot appear within " |
4938 | "a DO block"); | |
ea37f786 | 4939 | break; |
4940 | case COMP_SELECT: | |
1a9745d2 | 4941 | gfc_error ("ENTRY statement at %C cannot appear within " |
4942 | "a SELECT block"); | |
ea37f786 | 4943 | break; |
4944 | case COMP_FORALL: | |
1a9745d2 | 4945 | gfc_error ("ENTRY statement at %C cannot appear within " |
4946 | "a FORALL block"); | |
ea37f786 | 4947 | break; |
4948 | case COMP_WHERE: | |
1a9745d2 | 4949 | gfc_error ("ENTRY statement at %C cannot appear within " |
4950 | "a WHERE block"); | |
ea37f786 | 4951 | break; |
4952 | case COMP_CONTAINS: | |
1a9745d2 | 4953 | gfc_error ("ENTRY statement at %C cannot appear within " |
4954 | "a contained subprogram"); | |
ea37f786 | 4955 | break; |
4956 | default: | |
4957 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
4958 | } | |
1b716045 | 4959 | return MATCH_ERROR; |
4960 | } | |
4961 | ||
d77f260f | 4962 | module_procedure = gfc_current_ns->parent != NULL |
1a9745d2 | 4963 | && gfc_current_ns->parent->proc_name |
4964 | && gfc_current_ns->parent->proc_name->attr.flavor | |
4965 | == FL_MODULE; | |
d77f260f | 4966 | |
1b716045 | 4967 | if (gfc_current_ns->parent != NULL |
4968 | && gfc_current_ns->parent->proc_name | |
d77f260f | 4969 | && !module_procedure) |
1b716045 | 4970 | { |
4971 | gfc_error("ENTRY statement at %C cannot appear in a " | |
4972 | "contained procedure"); | |
4973 | return MATCH_ERROR; | |
4974 | } | |
4975 | ||
d77f260f | 4976 | /* Module function entries need special care in get_proc_name |
4977 | because previous references within the function will have | |
4978 | created symbols attached to the current namespace. */ | |
4979 | if (get_proc_name (name, &entry, | |
4980 | gfc_current_ns->parent != NULL | |
c1e4695a | 4981 | && module_procedure)) |
4ee9c684 | 4982 | return MATCH_ERROR; |
4983 | ||
1b716045 | 4984 | proc = gfc_current_block (); |
4985 | ||
86f0974b | 4986 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
4987 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4988 | not allowed for procedures. */ | |
4989 | if (entry->attr.is_bind_c == 1) | |
4990 | { | |
4991 | entry->attr.is_bind_c = 0; | |
4992 | if (entry->old_symbol != NULL) | |
4993 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4994 | "variables or common blocks", | |
4995 | &(entry->old_symbol->declared_at)); | |
4996 | else | |
4997 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4998 | "variables or common blocks", &gfc_current_locus); | |
4999 | } | |
5000 | ||
5001 | /* Check what next non-whitespace character is so we can tell if there | |
5002 | is the required parens if we have a BIND(C). */ | |
5003 | gfc_gobble_whitespace (); | |
e0be6f02 | 5004 | peek_char = gfc_peek_ascii_char (); |
86f0974b | 5005 | |
1b716045 | 5006 | if (state == COMP_SUBROUTINE) |
4ee9c684 | 5007 | { |
950683ed | 5008 | /* An entry in a subroutine. */ |
8cafc742 | 5009 | if (!gfc_current_ns->parent && !add_global_entry (name, 1)) |
858f9894 | 5010 | return MATCH_ERROR; |
5011 | ||
4ee9c684 | 5012 | m = gfc_match_formal_arglist (entry, 0, 1); |
5013 | if (m != MATCH_YES) | |
5014 | return MATCH_ERROR; | |
5015 | ||
75ae7f6c | 5016 | /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can |
5017 | never be an internal procedure. */ | |
5018 | is_bind_c = gfc_match_bind_c (entry, true); | |
86f0974b | 5019 | if (is_bind_c == MATCH_ERROR) |
5020 | return MATCH_ERROR; | |
5021 | if (is_bind_c == MATCH_YES) | |
5022 | { | |
5023 | if (peek_char != '(') | |
5024 | { | |
5025 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
5026 | return MATCH_ERROR; | |
5027 | } | |
5028 | if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1) | |
5029 | == FAILURE) | |
5030 | return MATCH_ERROR; | |
5031 | } | |
5032 | ||
950683ed | 5033 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
5034 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 5035 | return MATCH_ERROR; |
1b716045 | 5036 | } |
5037 | else | |
5038 | { | |
7b5e1acc | 5039 | /* An entry in a function. |
1a9745d2 | 5040 | We need to take special care because writing |
5041 | ENTRY f() | |
5042 | as | |
5043 | ENTRY f | |
5044 | is allowed, whereas | |
5045 | ENTRY f() RESULT (r) | |
5046 | can't be written as | |
5047 | ENTRY f RESULT (r). */ | |
8cafc742 | 5048 | if (!gfc_current_ns->parent && !add_global_entry (name, 0)) |
858f9894 | 5049 | return MATCH_ERROR; |
5050 | ||
7b5e1acc | 5051 | old_loc = gfc_current_locus; |
5052 | if (gfc_match_eos () == MATCH_YES) | |
5053 | { | |
5054 | gfc_current_locus = old_loc; | |
5055 | /* Match the empty argument list, and add the interface to | |
5056 | the symbol. */ | |
5057 | m = gfc_match_formal_arglist (entry, 0, 1); | |
5058 | } | |
5059 | else | |
5060 | m = gfc_match_formal_arglist (entry, 0, 0); | |
5061 | ||
4ee9c684 | 5062 | if (m != MATCH_YES) |
5063 | return MATCH_ERROR; | |
5064 | ||
4ee9c684 | 5065 | result = NULL; |
5066 | ||
5067 | if (gfc_match_eos () == MATCH_YES) | |
5068 | { | |
950683ed | 5069 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
5070 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 5071 | return MATCH_ERROR; |
5072 | ||
c6871095 | 5073 | entry->result = entry; |
4ee9c684 | 5074 | } |
5075 | else | |
5076 | { | |
86f0974b | 5077 | m = gfc_match_suffix (entry, &result); |
4ee9c684 | 5078 | if (m == MATCH_NO) |
5079 | gfc_syntax_error (ST_ENTRY); | |
5080 | if (m != MATCH_YES) | |
5081 | return MATCH_ERROR; | |
5082 | ||
86f0974b | 5083 | if (result) |
5084 | { | |
5085 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE | |
5086 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
5087 | || gfc_add_function (&entry->attr, result->name, NULL) | |
5088 | == FAILURE) | |
5089 | return MATCH_ERROR; | |
5090 | entry->result = result; | |
5091 | } | |
5092 | else | |
5093 | { | |
5094 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE | |
5095 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
5096 | return MATCH_ERROR; | |
5097 | entry->result = entry; | |
5098 | } | |
4ee9c684 | 5099 | } |
4ee9c684 | 5100 | } |
5101 | ||
5102 | if (gfc_match_eos () != MATCH_YES) | |
5103 | { | |
5104 | gfc_syntax_error (ST_ENTRY); | |
5105 | return MATCH_ERROR; | |
5106 | } | |
5107 | ||
1b716045 | 5108 | entry->attr.recursive = proc->attr.recursive; |
5109 | entry->attr.elemental = proc->attr.elemental; | |
5110 | entry->attr.pure = proc->attr.pure; | |
4ee9c684 | 5111 | |
1b716045 | 5112 | el = gfc_get_entry_list (); |
5113 | el->sym = entry; | |
5114 | el->next = gfc_current_ns->entries; | |
5115 | gfc_current_ns->entries = el; | |
5116 | if (el->next) | |
5117 | el->id = el->next->id + 1; | |
5118 | else | |
5119 | el->id = 1; | |
4ee9c684 | 5120 | |
1b716045 | 5121 | new_st.op = EXEC_ENTRY; |
5122 | new_st.ext.entry = el; | |
5123 | ||
5124 | return MATCH_YES; | |
4ee9c684 | 5125 | } |
5126 | ||
5127 | ||
5128 | /* Match a subroutine statement, including optional prefixes. */ | |
5129 | ||
5130 | match | |
5131 | gfc_match_subroutine (void) | |
5132 | { | |
5133 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5134 | gfc_symbol *sym; | |
5135 | match m; | |
c5d33754 | 5136 | match is_bind_c; |
5137 | char peek_char; | |
75ae7f6c | 5138 | bool allow_binding_name; |
4ee9c684 | 5139 | |
5140 | if (gfc_current_state () != COMP_NONE | |
5141 | && gfc_current_state () != COMP_INTERFACE | |
5142 | && gfc_current_state () != COMP_CONTAINS) | |
5143 | return MATCH_NO; | |
5144 | ||
077932f9 | 5145 | m = gfc_match_prefix (NULL); |
4ee9c684 | 5146 | if (m != MATCH_YES) |
5147 | return m; | |
5148 | ||
5149 | m = gfc_match ("subroutine% %n", name); | |
5150 | if (m != MATCH_YES) | |
5151 | return m; | |
5152 | ||
d77f260f | 5153 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 5154 | return MATCH_ERROR; |
1e057e9b | 5155 | |
5156 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
5157 | sym = sym->result; | |
5158 | ||
4ee9c684 | 5159 | gfc_new_block = sym; |
5160 | ||
c5d33754 | 5161 | /* Check what next non-whitespace character is so we can tell if there |
86f0974b | 5162 | is the required parens if we have a BIND(C). */ |
c5d33754 | 5163 | gfc_gobble_whitespace (); |
e0be6f02 | 5164 | peek_char = gfc_peek_ascii_char (); |
c5d33754 | 5165 | |
950683ed | 5166 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
4ee9c684 | 5167 | return MATCH_ERROR; |
5168 | ||
5169 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
5170 | return MATCH_ERROR; | |
5171 | ||
c5d33754 | 5172 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
5173 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
5174 | not allowed for procedures. */ | |
5175 | if (sym->attr.is_bind_c == 1) | |
5176 | { | |
5177 | sym->attr.is_bind_c = 0; | |
5178 | if (sym->old_symbol != NULL) | |
5179 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5180 | "variables or common blocks", | |
5181 | &(sym->old_symbol->declared_at)); | |
5182 | else | |
5183 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5184 | "variables or common blocks", &gfc_current_locus); | |
5185 | } | |
75ae7f6c | 5186 | |
5187 | /* C binding names are not allowed for internal procedures. */ | |
5188 | if (gfc_current_state () == COMP_CONTAINS | |
5189 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
5190 | allow_binding_name = false; | |
5191 | else | |
5192 | allow_binding_name = true; | |
5193 | ||
c5d33754 | 5194 | /* Here, we are just checking if it has the bind(c) attribute, and if |
5195 | so, then we need to make sure it's all correct. If it doesn't, | |
5196 | we still need to continue matching the rest of the subroutine line. */ | |
75ae7f6c | 5197 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 5198 | if (is_bind_c == MATCH_ERROR) |
5199 | { | |
5200 | /* There was an attempt at the bind(c), but it was wrong. An | |
5201 | error message should have been printed w/in the gfc_match_bind_c | |
5202 | so here we'll just return the MATCH_ERROR. */ | |
5203 | return MATCH_ERROR; | |
5204 | } | |
5205 | ||
5206 | if (is_bind_c == MATCH_YES) | |
5207 | { | |
75ae7f6c | 5208 | /* The following is allowed in the Fortran 2008 draft. */ |
4518e961 | 5209 | if (gfc_current_state () == COMP_CONTAINS |
75ae7f6c | 5210 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
2dcae6c7 | 5211 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
5212 | "at %L may not be specified for an internal " | |
5213 | "procedure", &gfc_current_locus) | |
75ae7f6c | 5214 | == FAILURE) |
5215 | return MATCH_ERROR; | |
5216 | ||
c5d33754 | 5217 | if (peek_char != '(') |
5218 | { | |
5219 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
5220 | return MATCH_ERROR; | |
5221 | } | |
5222 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) | |
5223 | == FAILURE) | |
5224 | return MATCH_ERROR; | |
5225 | } | |
5226 | ||
4ee9c684 | 5227 | if (gfc_match_eos () != MATCH_YES) |
5228 | { | |
5229 | gfc_syntax_error (ST_SUBROUTINE); | |
5230 | return MATCH_ERROR; | |
5231 | } | |
5232 | ||
5233 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
5234 | return MATCH_ERROR; | |
5235 | ||
a34926ba | 5236 | /* Warn if it has the same name as an intrinsic. */ |
5237 | warn_intrinsic_shadow (sym, false); | |
5238 | ||
4ee9c684 | 5239 | return MATCH_YES; |
5240 | } | |
5241 | ||
5242 | ||
c5d33754 | 5243 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
5244 | given, and set the binding label in either the given symbol (if not | |
a0527218 | 5245 | NULL), or in the current_ts. The symbol may be NULL because we may |
c5d33754 | 5246 | encounter the BIND(C) before the declaration itself. Return |
5247 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, | |
5248 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, | |
5249 | or MATCH_YES if the specifier was correct and the binding label and | |
5250 | bind(c) fields were set correctly for the given symbol or the | |
75ae7f6c | 5251 | current_ts. If allow_binding_name is false, no binding name may be |
5252 | given. */ | |
c5d33754 | 5253 | |
5254 | match | |
75ae7f6c | 5255 | gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name) |
c5d33754 | 5256 | { |
5257 | /* binding label, if exists */ | |
5258 | char binding_label[GFC_MAX_SYMBOL_LEN + 1]; | |
5259 | match double_quote; | |
5260 | match single_quote; | |
c5d33754 | 5261 | |
5262 | /* Initialize the flag that specifies whether we encountered a NAME= | |
5263 | specifier or not. */ | |
5264 | has_name_equals = 0; | |
5265 | ||
5266 | /* Init the first char to nil so we can catch if we don't have | |
5267 | the label (name attr) or the symbol name yet. */ | |
5268 | binding_label[0] = '\0'; | |
5269 | ||
5270 | /* This much we have to be able to match, in this order, if | |
5271 | there is a bind(c) label. */ | |
5272 | if (gfc_match (" bind ( c ") != MATCH_YES) | |
5273 | return MATCH_NO; | |
5274 | ||
5275 | /* Now see if there is a binding label, or if we've reached the | |
5276 | end of the bind(c) attribute without one. */ | |
5277 | if (gfc_match_char (',') == MATCH_YES) | |
5278 | { | |
5279 | if (gfc_match (" name = ") != MATCH_YES) | |
5280 | { | |
5281 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5282 | "at %C"); | |
5283 | /* should give an error message here */ | |
5284 | return MATCH_ERROR; | |
5285 | } | |
5286 | ||
5287 | has_name_equals = 1; | |
5288 | ||
5289 | /* Get the opening quote. */ | |
5290 | double_quote = MATCH_YES; | |
5291 | single_quote = MATCH_YES; | |
5292 | double_quote = gfc_match_char ('"'); | |
5293 | if (double_quote != MATCH_YES) | |
5294 | single_quote = gfc_match_char ('\''); | |
5295 | if (double_quote != MATCH_YES && single_quote != MATCH_YES) | |
5296 | { | |
5297 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5298 | "at %C"); | |
5299 | return MATCH_ERROR; | |
5300 | } | |
5301 | ||
5302 | /* Grab the binding label, using functions that will not lower | |
5303 | case the names automatically. */ | |
5304 | if (gfc_match_name_C (binding_label) != MATCH_YES) | |
5305 | return MATCH_ERROR; | |
5306 | ||
5307 | /* Get the closing quotation. */ | |
5308 | if (double_quote == MATCH_YES) | |
5309 | { | |
5310 | if (gfc_match_char ('"') != MATCH_YES) | |
5311 | { | |
5312 | gfc_error ("Missing closing quote '\"' for binding label at %C"); | |
5313 | /* User started string with '"' so looked to match it. */ | |
5314 | return MATCH_ERROR; | |
5315 | } | |
5316 | } | |
5317 | else | |
5318 | { | |
5319 | if (gfc_match_char ('\'') != MATCH_YES) | |
5320 | { | |
5321 | gfc_error ("Missing closing quote '\'' for binding label at %C"); | |
5322 | /* User started string with "'" char. */ | |
5323 | return MATCH_ERROR; | |
5324 | } | |
5325 | } | |
5326 | } | |
5327 | ||
5328 | /* Get the required right paren. */ | |
5329 | if (gfc_match_char (')') != MATCH_YES) | |
5330 | { | |
5331 | gfc_error ("Missing closing paren for binding label at %C"); | |
5332 | return MATCH_ERROR; | |
5333 | } | |
5334 | ||
75ae7f6c | 5335 | if (has_name_equals && !allow_binding_name) |
5336 | { | |
5337 | gfc_error ("No binding name is allowed in BIND(C) at %C"); | |
5338 | return MATCH_ERROR; | |
5339 | } | |
5340 | ||
5341 | if (has_name_equals && sym != NULL && sym->attr.dummy) | |
5342 | { | |
5343 | gfc_error ("For dummy procedure %s, no binding name is " | |
5344 | "allowed in BIND(C) at %C", sym->name); | |
5345 | return MATCH_ERROR; | |
5346 | } | |
5347 | ||
5348 | ||
c5d33754 | 5349 | /* Save the binding label to the symbol. If sym is null, we're |
5350 | probably matching the typespec attributes of a declaration and | |
5351 | haven't gotten the name yet, and therefore, no symbol yet. */ | |
5352 | if (binding_label[0] != '\0') | |
5353 | { | |
5354 | if (sym != NULL) | |
5355 | { | |
b1223b39 | 5356 | strcpy (sym->binding_label, binding_label); |
c5d33754 | 5357 | } |
5358 | else | |
b1223b39 | 5359 | strcpy (curr_binding_label, binding_label); |
c5d33754 | 5360 | } |
75ae7f6c | 5361 | else if (allow_binding_name) |
c5d33754 | 5362 | { |
5363 | /* No binding label, but if symbol isn't null, we | |
75ae7f6c | 5364 | can set the label for it here. |
5365 | If name="" or allow_binding_name is false, no C binding name is | |
5366 | created. */ | |
c5d33754 | 5367 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) |
5368 | strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1); | |
5369 | } | |
94fa7146 | 5370 | |
5cf92482 | 5371 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
5372 | && current_interface.type == INTERFACE_ABSTRACT) | |
94fa7146 | 5373 | { |
5374 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); | |
5375 | return MATCH_ERROR; | |
5376 | } | |
5377 | ||
c5d33754 | 5378 | return MATCH_YES; |
5379 | } | |
5380 | ||
5381 | ||
231e961a | 5382 | /* Return nonzero if we're currently compiling a contained procedure. */ |
c0985832 | 5383 | |
5384 | static int | |
5385 | contained_procedure (void) | |
5386 | { | |
1c343287 | 5387 | gfc_state_data *s = gfc_state_stack; |
c0985832 | 5388 | |
1c343287 | 5389 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) |
5390 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) | |
5391 | return 1; | |
c0985832 | 5392 | |
5393 | return 0; | |
5394 | } | |
5395 | ||
e14bee04 | 5396 | /* Set the kind of each enumerator. The kind is selected such that it is |
3b6a4b41 | 5397 | interoperable with the corresponding C enumeration type, making |
5398 | sure that -fshort-enums is honored. */ | |
5399 | ||
5400 | static void | |
5401 | set_enum_kind(void) | |
5402 | { | |
5403 | enumerator_history *current_history = NULL; | |
5404 | int kind; | |
5405 | int i; | |
5406 | ||
5407 | if (max_enum == NULL || enum_history == NULL) | |
5408 | return; | |
5409 | ||
6f092e31 | 5410 | if (!flag_short_enums) |
e14bee04 | 5411 | return; |
5412 | ||
3b6a4b41 | 5413 | i = 0; |
5414 | do | |
5415 | { | |
5416 | kind = gfc_integer_kinds[i++].kind; | |
5417 | } | |
e14bee04 | 5418 | while (kind < gfc_c_int_kind |
3b6a4b41 | 5419 | && gfc_check_integer_range (max_enum->initializer->value.integer, |
5420 | kind) != ARITH_OK); | |
5421 | ||
5422 | current_history = enum_history; | |
5423 | while (current_history != NULL) | |
5424 | { | |
5425 | current_history->sym->ts.kind = kind; | |
5426 | current_history = current_history->next; | |
5427 | } | |
5428 | } | |
5429 | ||
1a9745d2 | 5430 | |
4ee9c684 | 5431 | /* Match any of the various end-block statements. Returns the type of |
6a7084d7 | 5432 | END to the caller. The END INTERFACE, END IF, END DO, END SELECT |
5433 | and END BLOCK statements cannot be replaced by a single END statement. */ | |
4ee9c684 | 5434 | |
5435 | match | |
1a9745d2 | 5436 | gfc_match_end (gfc_statement *st) |
4ee9c684 | 5437 | { |
5438 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5439 | gfc_compile_state state; | |
5440 | locus old_loc; | |
5441 | const char *block_name; | |
5442 | const char *target; | |
c0985832 | 5443 | int eos_ok; |
4ee9c684 | 5444 | match m; |
5445 | ||
cbb9e6aa | 5446 | old_loc = gfc_current_locus; |
4ee9c684 | 5447 | if (gfc_match ("end") != MATCH_YES) |
5448 | return MATCH_NO; | |
5449 | ||
5450 | state = gfc_current_state (); | |
1a9745d2 | 5451 | block_name = gfc_current_block () == NULL |
5452 | ? NULL : gfc_current_block ()->name; | |
4ee9c684 | 5453 | |
6a7084d7 | 5454 | if (state == COMP_BLOCK && !strcmp (block_name, "block@")) |
5455 | block_name = NULL; | |
5456 | ||
7fd88f6e | 5457 | if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS) |
4ee9c684 | 5458 | { |
5459 | state = gfc_state_stack->previous->state; | |
1a9745d2 | 5460 | block_name = gfc_state_stack->previous->sym == NULL |
5461 | ? NULL : gfc_state_stack->previous->sym->name; | |
4ee9c684 | 5462 | } |
5463 | ||
5464 | switch (state) | |
5465 | { | |
5466 | case COMP_NONE: | |
5467 | case COMP_PROGRAM: | |
5468 | *st = ST_END_PROGRAM; | |
5469 | target = " program"; | |
c0985832 | 5470 | eos_ok = 1; |
4ee9c684 | 5471 | break; |
5472 | ||
5473 | case COMP_SUBROUTINE: | |
5474 | *st = ST_END_SUBROUTINE; | |
5475 | target = " subroutine"; | |
c0985832 | 5476 | eos_ok = !contained_procedure (); |
4ee9c684 | 5477 | break; |
5478 | ||
5479 | case COMP_FUNCTION: | |
5480 | *st = ST_END_FUNCTION; | |
5481 | target = " function"; | |
c0985832 | 5482 | eos_ok = !contained_procedure (); |
4ee9c684 | 5483 | break; |
5484 | ||
5485 | case COMP_BLOCK_DATA: | |
5486 | *st = ST_END_BLOCK_DATA; | |
5487 | target = " block data"; | |
c0985832 | 5488 | eos_ok = 1; |
4ee9c684 | 5489 | break; |
5490 | ||
5491 | case COMP_MODULE: | |
5492 | *st = ST_END_MODULE; | |
5493 | target = " module"; | |
c0985832 | 5494 | eos_ok = 1; |
4ee9c684 | 5495 | break; |
5496 | ||
5497 | case COMP_INTERFACE: | |
5498 | *st = ST_END_INTERFACE; | |
5499 | target = " interface"; | |
c0985832 | 5500 | eos_ok = 0; |
4ee9c684 | 5501 | break; |
5502 | ||
5503 | case COMP_DERIVED: | |
7fd88f6e | 5504 | case COMP_DERIVED_CONTAINS: |
4ee9c684 | 5505 | *st = ST_END_TYPE; |
5506 | target = " type"; | |
c0985832 | 5507 | eos_ok = 0; |
4ee9c684 | 5508 | break; |
5509 | ||
6a7084d7 | 5510 | case COMP_BLOCK: |
5511 | *st = ST_END_BLOCK; | |
5512 | target = " block"; | |
5513 | eos_ok = 0; | |
5514 | break; | |
5515 | ||
4ee9c684 | 5516 | case COMP_IF: |
5517 | *st = ST_ENDIF; | |
5518 | target = " if"; | |
c0985832 | 5519 | eos_ok = 0; |
4ee9c684 | 5520 | break; |
5521 | ||
5522 | case COMP_DO: | |
5523 | *st = ST_ENDDO; | |
5524 | target = " do"; | |
c0985832 | 5525 | eos_ok = 0; |
4ee9c684 | 5526 | break; |
5527 | ||
5528 | case COMP_SELECT: | |
1de1b1a9 | 5529 | case COMP_SELECT_TYPE: |
4ee9c684 | 5530 | *st = ST_END_SELECT; |
5531 | target = " select"; | |
c0985832 | 5532 | eos_ok = 0; |
4ee9c684 | 5533 | break; |
5534 | ||
5535 | case COMP_FORALL: | |
5536 | *st = ST_END_FORALL; | |
5537 | target = " forall"; | |
c0985832 | 5538 | eos_ok = 0; |
4ee9c684 | 5539 | break; |
5540 | ||
5541 | case COMP_WHERE: | |
5542 | *st = ST_END_WHERE; | |
5543 | target = " where"; | |
c0985832 | 5544 | eos_ok = 0; |
4ee9c684 | 5545 | break; |
5546 | ||
3b6a4b41 | 5547 | case COMP_ENUM: |
5548 | *st = ST_END_ENUM; | |
5549 | target = " enum"; | |
5550 | eos_ok = 0; | |
5551 | last_initializer = NULL; | |
5552 | set_enum_kind (); | |
5553 | gfc_free_enum_history (); | |
5554 | break; | |
5555 | ||
4ee9c684 | 5556 | default: |
5557 | gfc_error ("Unexpected END statement at %C"); | |
5558 | goto cleanup; | |
5559 | } | |
5560 | ||
5561 | if (gfc_match_eos () == MATCH_YES) | |
5562 | { | |
c0985832 | 5563 | if (!eos_ok) |
4ee9c684 | 5564 | { |
f6d0e37a | 5565 | /* We would have required END [something]. */ |
d197c9ee | 5566 | gfc_error ("%s statement expected at %L", |
5567 | gfc_ascii_statement (*st), &old_loc); | |
4ee9c684 | 5568 | goto cleanup; |
5569 | } | |
5570 | ||
5571 | return MATCH_YES; | |
5572 | } | |
5573 | ||
5574 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
5575 | if (gfc_match (target) != MATCH_YES) | |
5576 | { | |
5577 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
5578 | goto cleanup; | |
5579 | } | |
5580 | ||
5581 | /* If we're at the end, make sure a block name wasn't required. */ | |
5582 | if (gfc_match_eos () == MATCH_YES) | |
5583 | { | |
5584 | ||
0d0ce415 | 5585 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT |
6a7084d7 | 5586 | && *st != ST_END_FORALL && *st != ST_END_WHERE && *st != ST_END_BLOCK) |
4ee9c684 | 5587 | return MATCH_YES; |
5588 | ||
6a7084d7 | 5589 | if (!block_name) |
4ee9c684 | 5590 | return MATCH_YES; |
5591 | ||
5592 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
5593 | block_name, gfc_ascii_statement (*st)); | |
5594 | ||
5595 | return MATCH_ERROR; | |
5596 | } | |
5597 | ||
5598 | /* END INTERFACE has a special handler for its several possible endings. */ | |
5599 | if (*st == ST_END_INTERFACE) | |
5600 | return gfc_match_end_interface (); | |
5601 | ||
f6d0e37a | 5602 | /* We haven't hit the end of statement, so what is left must be an |
5603 | end-name. */ | |
4ee9c684 | 5604 | m = gfc_match_space (); |
5605 | if (m == MATCH_YES) | |
5606 | m = gfc_match_name (name); | |
5607 | ||
5608 | if (m == MATCH_NO) | |
5609 | gfc_error ("Expected terminating name at %C"); | |
5610 | if (m != MATCH_YES) | |
5611 | goto cleanup; | |
5612 | ||
5613 | if (block_name == NULL) | |
5614 | goto syntax; | |
5615 | ||
1e057e9b | 5616 | if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0) |
4ee9c684 | 5617 | { |
5618 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
5619 | gfc_ascii_statement (*st)); | |
5620 | goto cleanup; | |
5621 | } | |
1e057e9b | 5622 | /* Procedure pointer as function result. */ |
5623 | else if (strcmp (block_name, "ppr@") == 0 | |
5624 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0) | |
5625 | { | |
5626 | gfc_error ("Expected label '%s' for %s statement at %C", | |
5627 | gfc_current_block ()->ns->proc_name->name, | |
5628 | gfc_ascii_statement (*st)); | |
5629 | goto cleanup; | |
5630 | } | |
4ee9c684 | 5631 | |
5632 | if (gfc_match_eos () == MATCH_YES) | |
5633 | return MATCH_YES; | |
5634 | ||
5635 | syntax: | |
5636 | gfc_syntax_error (*st); | |
5637 | ||
5638 | cleanup: | |
cbb9e6aa | 5639 | gfc_current_locus = old_loc; |
4ee9c684 | 5640 | return MATCH_ERROR; |
5641 | } | |
5642 | ||
5643 | ||
5644 | ||
5645 | /***************** Attribute declaration statements ****************/ | |
5646 | ||
5647 | /* Set the attribute of a single variable. */ | |
5648 | ||
5649 | static match | |
5650 | attr_decl1 (void) | |
5651 | { | |
5652 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5653 | gfc_array_spec *as; | |
5654 | gfc_symbol *sym; | |
5655 | locus var_locus; | |
5656 | match m; | |
5657 | ||
5658 | as = NULL; | |
5659 | ||
5660 | m = gfc_match_name (name); | |
5661 | if (m != MATCH_YES) | |
5662 | goto cleanup; | |
5663 | ||
36b0a1b0 | 5664 | if (find_special (name, &sym, false)) |
4ee9c684 | 5665 | return MATCH_ERROR; |
5666 | ||
cbb9e6aa | 5667 | var_locus = gfc_current_locus; |
4ee9c684 | 5668 | |
5669 | /* Deal with possible array specification for certain attributes. */ | |
5670 | if (current_attr.dimension | |
5671 | || current_attr.allocatable | |
5672 | || current_attr.pointer | |
5673 | || current_attr.target) | |
5674 | { | |
5675 | m = gfc_match_array_spec (&as); | |
5676 | if (m == MATCH_ERROR) | |
5677 | goto cleanup; | |
5678 | ||
5679 | if (current_attr.dimension && m == MATCH_NO) | |
5680 | { | |
1a9745d2 | 5681 | gfc_error ("Missing array specification at %L in DIMENSION " |
5682 | "statement", &var_locus); | |
4ee9c684 | 5683 | m = MATCH_ERROR; |
5684 | goto cleanup; | |
5685 | } | |
5686 | ||
13aebeb0 | 5687 | if (current_attr.dimension && sym->value) |
5688 | { | |
5689 | gfc_error ("Dimensions specified for %s at %L after its " | |
5690 | "initialisation", sym->name, &var_locus); | |
5691 | m = MATCH_ERROR; | |
5692 | goto cleanup; | |
5693 | } | |
5694 | ||
4ee9c684 | 5695 | if ((current_attr.allocatable || current_attr.pointer) |
5696 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
5697 | { | |
1a9745d2 | 5698 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
4ee9c684 | 5699 | m = MATCH_ERROR; |
5700 | goto cleanup; | |
5701 | } | |
5702 | } | |
5703 | ||
b3704193 | 5704 | /* Update symbol table. DIMENSION attribute is set in |
5705 | gfc_set_array_spec(). For CLASS variables, this must be applied | |
5706 | to the first component, or '$data' field. */ | |
5707 | if (sym->ts.type == BT_CLASS && sym->ts.u.derived) | |
4ee9c684 | 5708 | { |
b3704193 | 5709 | gfc_component *comp; |
5710 | comp = gfc_find_component (sym->ts.u.derived, "$data", true, true); | |
5711 | if (comp == NULL || gfc_copy_attr (&comp->attr, ¤t_attr, | |
5712 | &var_locus) == FAILURE) | |
5713 | { | |
5714 | m = MATCH_ERROR; | |
5715 | goto cleanup; | |
5716 | } | |
5717 | sym->attr.class_ok = (sym->attr.class_ok | |
5718 | || current_attr.allocatable | |
5719 | || current_attr.pointer); | |
5720 | } | |
5721 | else | |
5722 | { | |
5723 | if (current_attr.dimension == 0 | |
5724 | && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE) | |
5725 | { | |
5726 | m = MATCH_ERROR; | |
5727 | goto cleanup; | |
5728 | } | |
4ee9c684 | 5729 | } |
5730 | ||
5731 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
5732 | { | |
5733 | m = MATCH_ERROR; | |
5734 | goto cleanup; | |
5735 | } | |
e14bee04 | 5736 | |
b549d2a5 | 5737 | if (sym->attr.cray_pointee && sym->as != NULL) |
5738 | { | |
5739 | /* Fix the array spec. */ | |
5740 | m = gfc_mod_pointee_as (sym->as); | |
5741 | if (m == MATCH_ERROR) | |
5742 | goto cleanup; | |
5743 | } | |
4ee9c684 | 5744 | |
25dd7350 | 5745 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
14efb9b7 | 5746 | { |
5747 | m = MATCH_ERROR; | |
5748 | goto cleanup; | |
5749 | } | |
5750 | ||
4ee9c684 | 5751 | if ((current_attr.external || current_attr.intrinsic) |
5752 | && sym->attr.flavor != FL_PROCEDURE | |
950683ed | 5753 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
4ee9c684 | 5754 | { |
5755 | m = MATCH_ERROR; | |
5756 | goto cleanup; | |
5757 | } | |
5758 | ||
1e057e9b | 5759 | add_hidden_procptr_result (sym); |
5760 | ||
4ee9c684 | 5761 | return MATCH_YES; |
5762 | ||
5763 | cleanup: | |
5764 | gfc_free_array_spec (as); | |
5765 | return m; | |
5766 | } | |
5767 | ||
5768 | ||
5769 | /* Generic attribute declaration subroutine. Used for attributes that | |
5770 | just have a list of names. */ | |
5771 | ||
5772 | static match | |
5773 | attr_decl (void) | |
5774 | { | |
5775 | match m; | |
5776 | ||
5777 | /* Gobble the optional double colon, by simply ignoring the result | |
5778 | of gfc_match(). */ | |
5779 | gfc_match (" ::"); | |
5780 | ||
5781 | for (;;) | |
5782 | { | |
5783 | m = attr_decl1 (); | |
5784 | if (m != MATCH_YES) | |
5785 | break; | |
5786 | ||
5787 | if (gfc_match_eos () == MATCH_YES) | |
5788 | { | |
5789 | m = MATCH_YES; | |
5790 | break; | |
5791 | } | |
5792 | ||
5793 | if (gfc_match_char (',') != MATCH_YES) | |
5794 | { | |
5795 | gfc_error ("Unexpected character in variable list at %C"); | |
5796 | m = MATCH_ERROR; | |
5797 | break; | |
5798 | } | |
5799 | } | |
5800 | ||
5801 | return m; | |
5802 | } | |
5803 | ||
5804 | ||
b549d2a5 | 5805 | /* This routine matches Cray Pointer declarations of the form: |
5806 | pointer ( <pointer>, <pointee> ) | |
5807 | or | |
e14bee04 | 5808 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
5809 | The pointer, if already declared, should be an integer. Otherwise, we | |
b549d2a5 | 5810 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
5811 | be either a scalar, or an array declaration. No space is allocated for | |
e14bee04 | 5812 | the pointee. For the statement |
b549d2a5 | 5813 | pointer (ipt, ar(10)) |
5814 | any subsequent uses of ar will be translated (in C-notation) as | |
e14bee04 | 5815 | ar(i) => ((<type> *) ipt)(i) |
b7bf3f81 | 5816 | After gimplification, pointee variable will disappear in the code. */ |
b549d2a5 | 5817 | |
5818 | static match | |
5819 | cray_pointer_decl (void) | |
5820 | { | |
5821 | match m; | |
5822 | gfc_array_spec *as; | |
5823 | gfc_symbol *cptr; /* Pointer symbol. */ | |
5824 | gfc_symbol *cpte; /* Pointee symbol. */ | |
5825 | locus var_locus; | |
5826 | bool done = false; | |
5827 | ||
5828 | while (!done) | |
5829 | { | |
5830 | if (gfc_match_char ('(') != MATCH_YES) | |
5831 | { | |
5832 | gfc_error ("Expected '(' at %C"); | |
e14bee04 | 5833 | return MATCH_ERROR; |
b549d2a5 | 5834 | } |
e14bee04 | 5835 | |
b549d2a5 | 5836 | /* Match pointer. */ |
5837 | var_locus = gfc_current_locus; | |
5838 | gfc_clear_attr (¤t_attr); | |
5839 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
5840 | current_ts.type = BT_INTEGER; | |
5841 | current_ts.kind = gfc_index_integer_kind; | |
5842 | ||
e14bee04 | 5843 | m = gfc_match_symbol (&cptr, 0); |
b549d2a5 | 5844 | if (m != MATCH_YES) |
5845 | { | |
5846 | gfc_error ("Expected variable name at %C"); | |
5847 | return m; | |
5848 | } | |
e14bee04 | 5849 | |
b549d2a5 | 5850 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) |
5851 | return MATCH_ERROR; | |
5852 | ||
e14bee04 | 5853 | gfc_set_sym_referenced (cptr); |
b549d2a5 | 5854 | |
5855 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
5856 | { | |
5857 | cptr->ts.type = BT_INTEGER; | |
e14bee04 | 5858 | cptr->ts.kind = gfc_index_integer_kind; |
b549d2a5 | 5859 | } |
5860 | else if (cptr->ts.type != BT_INTEGER) | |
5861 | { | |
7698a624 | 5862 | gfc_error ("Cray pointer at %C must be an integer"); |
b549d2a5 | 5863 | return MATCH_ERROR; |
5864 | } | |
5865 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
5866 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
7698a624 | 5867 | " memory addresses require %d bytes", |
1a9745d2 | 5868 | cptr->ts.kind, gfc_index_integer_kind); |
b549d2a5 | 5869 | |
5870 | if (gfc_match_char (',') != MATCH_YES) | |
5871 | { | |
5872 | gfc_error ("Expected \",\" at %C"); | |
e14bee04 | 5873 | return MATCH_ERROR; |
b549d2a5 | 5874 | } |
5875 | ||
e14bee04 | 5876 | /* Match Pointee. */ |
b549d2a5 | 5877 | var_locus = gfc_current_locus; |
5878 | gfc_clear_attr (¤t_attr); | |
5879 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
5880 | current_ts.type = BT_UNKNOWN; | |
5881 | current_ts.kind = 0; | |
5882 | ||
5883 | m = gfc_match_symbol (&cpte, 0); | |
5884 | if (m != MATCH_YES) | |
5885 | { | |
5886 | gfc_error ("Expected variable name at %C"); | |
5887 | return m; | |
5888 | } | |
e14bee04 | 5889 | |
b549d2a5 | 5890 | /* Check for an optional array spec. */ |
5891 | m = gfc_match_array_spec (&as); | |
5892 | if (m == MATCH_ERROR) | |
5893 | { | |
5894 | gfc_free_array_spec (as); | |
5895 | return m; | |
5896 | } | |
5897 | else if (m == MATCH_NO) | |
5898 | { | |
5899 | gfc_free_array_spec (as); | |
5900 | as = NULL; | |
5901 | } | |
5902 | ||
5903 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
5904 | return MATCH_ERROR; | |
5905 | ||
5906 | gfc_set_sym_referenced (cpte); | |
5907 | ||
5908 | if (cpte->as == NULL) | |
5909 | { | |
5910 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
5911 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
5912 | } | |
5913 | else if (as != NULL) | |
5914 | { | |
7698a624 | 5915 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 5916 | gfc_free_array_spec (as); |
5917 | return MATCH_ERROR; | |
5918 | } | |
5919 | ||
5920 | as = NULL; | |
5921 | ||
5922 | if (cpte->as != NULL) | |
5923 | { | |
5924 | /* Fix array spec. */ | |
5925 | m = gfc_mod_pointee_as (cpte->as); | |
5926 | if (m == MATCH_ERROR) | |
5927 | return m; | |
5928 | } | |
5929 | ||
5930 | /* Point the Pointee at the Pointer. */ | |
b7bf3f81 | 5931 | cpte->cp_pointer = cptr; |
b549d2a5 | 5932 | |
5933 | if (gfc_match_char (')') != MATCH_YES) | |
5934 | { | |
5935 | gfc_error ("Expected \")\" at %C"); | |
5936 | return MATCH_ERROR; | |
5937 | } | |
5938 | m = gfc_match_char (','); | |
5939 | if (m != MATCH_YES) | |
5940 | done = true; /* Stop searching for more declarations. */ | |
5941 | ||
5942 | } | |
5943 | ||
5944 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
5945 | || gfc_match_eos () != MATCH_YES) | |
5946 | { | |
5947 | gfc_error ("Expected \",\" or end of statement at %C"); | |
5948 | return MATCH_ERROR; | |
5949 | } | |
5950 | return MATCH_YES; | |
5951 | } | |
5952 | ||
5953 | ||
4ee9c684 | 5954 | match |
5955 | gfc_match_external (void) | |
5956 | { | |
5957 | ||
5958 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5959 | current_attr.external = 1; |
4ee9c684 | 5960 | |
5961 | return attr_decl (); | |
5962 | } | |
5963 | ||
5964 | ||
4ee9c684 | 5965 | match |
5966 | gfc_match_intent (void) | |
5967 | { | |
5968 | sym_intent intent; | |
5969 | ||
6a7084d7 | 5970 | /* This is not allowed within a BLOCK construct! */ |
5971 | if (gfc_current_state () == COMP_BLOCK) | |
5972 | { | |
5973 | gfc_error ("INTENT is not allowed inside of BLOCK at %C"); | |
5974 | return MATCH_ERROR; | |
5975 | } | |
5976 | ||
4ee9c684 | 5977 | intent = match_intent_spec (); |
5978 | if (intent == INTENT_UNKNOWN) | |
5979 | return MATCH_ERROR; | |
5980 | ||
5981 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5982 | current_attr.intent = intent; |
4ee9c684 | 5983 | |
5984 | return attr_decl (); | |
5985 | } | |
5986 | ||
5987 | ||
5988 | match | |
5989 | gfc_match_intrinsic (void) | |
5990 | { | |
5991 | ||
5992 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 5993 | current_attr.intrinsic = 1; |
4ee9c684 | 5994 | |
5995 | return attr_decl (); | |
5996 | } | |
5997 | ||
5998 | ||
5999 | match | |
6000 | gfc_match_optional (void) | |
6001 | { | |
6a7084d7 | 6002 | /* This is not allowed within a BLOCK construct! */ |
6003 | if (gfc_current_state () == COMP_BLOCK) | |
6004 | { | |
6005 | gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C"); | |
6006 | return MATCH_ERROR; | |
6007 | } | |
4ee9c684 | 6008 | |
6009 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 6010 | current_attr.optional = 1; |
4ee9c684 | 6011 | |
6012 | return attr_decl (); | |
6013 | } | |
6014 | ||
6015 | ||
6016 | match | |
6017 | gfc_match_pointer (void) | |
6018 | { | |
b549d2a5 | 6019 | gfc_gobble_whitespace (); |
e0be6f02 | 6020 | if (gfc_peek_ascii_char () == '(') |
b549d2a5 | 6021 | { |
6022 | if (!gfc_option.flag_cray_pointer) | |
6023 | { | |
1a9745d2 | 6024 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
6025 | "flag"); | |
b549d2a5 | 6026 | return MATCH_ERROR; |
6027 | } | |
6028 | return cray_pointer_decl (); | |
6029 | } | |
6030 | else | |
6031 | { | |
6032 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 6033 | current_attr.pointer = 1; |
b549d2a5 | 6034 | |
6035 | return attr_decl (); | |
6036 | } | |
4ee9c684 | 6037 | } |
6038 | ||
6039 | ||
6040 | match | |
6041 | gfc_match_allocatable (void) | |
6042 | { | |
4ee9c684 | 6043 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 6044 | current_attr.allocatable = 1; |
4ee9c684 | 6045 | |
6046 | return attr_decl (); | |
6047 | } | |
6048 | ||
6049 | ||
6050 | match | |
6051 | gfc_match_dimension (void) | |
6052 | { | |
4ee9c684 | 6053 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 6054 | current_attr.dimension = 1; |
4ee9c684 | 6055 | |
6056 | return attr_decl (); | |
6057 | } | |
6058 | ||
6059 | ||
6060 | match | |
6061 | gfc_match_target (void) | |
6062 | { | |
4ee9c684 | 6063 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 6064 | current_attr.target = 1; |
4ee9c684 | 6065 | |
6066 | return attr_decl (); | |
6067 | } | |
6068 | ||
6069 | ||
6070 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
6071 | statement. */ | |
6072 | ||
6073 | static match | |
6074 | access_attr_decl (gfc_statement st) | |
6075 | { | |
6076 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6077 | interface_type type; | |
6078 | gfc_user_op *uop; | |
6079 | gfc_symbol *sym; | |
dcb1b019 | 6080 | gfc_intrinsic_op op; |
4ee9c684 | 6081 | match m; |
6082 | ||
6083 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6084 | goto done; | |
6085 | ||
6086 | for (;;) | |
6087 | { | |
dcb1b019 | 6088 | m = gfc_match_generic_spec (&type, name, &op); |
4ee9c684 | 6089 | if (m == MATCH_NO) |
6090 | goto syntax; | |
6091 | if (m == MATCH_ERROR) | |
6092 | return MATCH_ERROR; | |
6093 | ||
6094 | switch (type) | |
6095 | { | |
6096 | case INTERFACE_NAMELESS: | |
94fa7146 | 6097 | case INTERFACE_ABSTRACT: |
4ee9c684 | 6098 | goto syntax; |
6099 | ||
6100 | case INTERFACE_GENERIC: | |
6101 | if (gfc_get_symbol (name, NULL, &sym)) | |
6102 | goto done; | |
6103 | ||
1a9745d2 | 6104 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
6105 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
950683ed | 6106 | sym->name, NULL) == FAILURE) |
4ee9c684 | 6107 | return MATCH_ERROR; |
6108 | ||
6109 | break; | |
6110 | ||
6111 | case INTERFACE_INTRINSIC_OP: | |
dcb1b019 | 6112 | if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN) |
4ee9c684 | 6113 | { |
dcb1b019 | 6114 | gfc_current_ns->operator_access[op] = |
4ee9c684 | 6115 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; |
6116 | } | |
6117 | else | |
6118 | { | |
6119 | gfc_error ("Access specification of the %s operator at %C has " | |
dcb1b019 | 6120 | "already been specified", gfc_op2string (op)); |
4ee9c684 | 6121 | goto done; |
6122 | } | |
6123 | ||
6124 | break; | |
6125 | ||
6126 | case INTERFACE_USER_OP: | |
6127 | uop = gfc_get_uop (name); | |
6128 | ||
6129 | if (uop->access == ACCESS_UNKNOWN) | |
6130 | { | |
1a9745d2 | 6131 | uop->access = (st == ST_PUBLIC) |
6132 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
4ee9c684 | 6133 | } |
6134 | else | |
6135 | { | |
1a9745d2 | 6136 | gfc_error ("Access specification of the .%s. operator at %C " |
6137 | "has already been specified", sym->name); | |
4ee9c684 | 6138 | goto done; |
6139 | } | |
6140 | ||
6141 | break; | |
6142 | } | |
6143 | ||
6144 | if (gfc_match_char (',') == MATCH_NO) | |
6145 | break; | |
6146 | } | |
6147 | ||
6148 | if (gfc_match_eos () != MATCH_YES) | |
6149 | goto syntax; | |
6150 | return MATCH_YES; | |
6151 | ||
6152 | syntax: | |
6153 | gfc_syntax_error (st); | |
6154 | ||
6155 | done: | |
6156 | return MATCH_ERROR; | |
6157 | } | |
6158 | ||
6159 | ||
3ea52af3 | 6160 | match |
6161 | gfc_match_protected (void) | |
6162 | { | |
6163 | gfc_symbol *sym; | |
6164 | match m; | |
6165 | ||
6166 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
6167 | { | |
6168 | gfc_error ("PROTECTED at %C only allowed in specification " | |
6169 | "part of a module"); | |
6170 | return MATCH_ERROR; | |
6171 | ||
6172 | } | |
6173 | ||
1a9745d2 | 6174 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
3ea52af3 | 6175 | == FAILURE) |
6176 | return MATCH_ERROR; | |
6177 | ||
6178 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6179 | { | |
6180 | return MATCH_ERROR; | |
6181 | } | |
6182 | ||
6183 | if (gfc_match_eos () == MATCH_YES) | |
6184 | goto syntax; | |
6185 | ||
6186 | for(;;) | |
6187 | { | |
6188 | m = gfc_match_symbol (&sym, 0); | |
6189 | switch (m) | |
6190 | { | |
6191 | case MATCH_YES: | |
1a9745d2 | 6192 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
6193 | == FAILURE) | |
3ea52af3 | 6194 | return MATCH_ERROR; |
6195 | goto next_item; | |
6196 | ||
6197 | case MATCH_NO: | |
6198 | break; | |
6199 | ||
6200 | case MATCH_ERROR: | |
6201 | return MATCH_ERROR; | |
6202 | } | |
6203 | ||
6204 | next_item: | |
6205 | if (gfc_match_eos () == MATCH_YES) | |
6206 | break; | |
6207 | if (gfc_match_char (',') != MATCH_YES) | |
6208 | goto syntax; | |
6209 | } | |
6210 | ||
6211 | return MATCH_YES; | |
6212 | ||
6213 | syntax: | |
6214 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
6215 | return MATCH_ERROR; | |
6216 | } | |
6217 | ||
6218 | ||
a0527218 | 6219 | /* The PRIVATE statement is a bit weird in that it can be an attribute |
69b1505f | 6220 | declaration, but also works as a standalone statement inside of a |
4ee9c684 | 6221 | type declaration or a module. */ |
6222 | ||
6223 | match | |
1a9745d2 | 6224 | gfc_match_private (gfc_statement *st) |
4ee9c684 | 6225 | { |
6226 | ||
6227 | if (gfc_match ("private") != MATCH_YES) | |
6228 | return MATCH_NO; | |
6229 | ||
e14bee04 | 6230 | if (gfc_current_state () != COMP_MODULE |
7fd88f6e | 6231 | && !(gfc_current_state () == COMP_DERIVED |
6232 | && gfc_state_stack->previous | |
6233 | && gfc_state_stack->previous->state == COMP_MODULE) | |
6234 | && !(gfc_current_state () == COMP_DERIVED_CONTAINS | |
6235 | && gfc_state_stack->previous && gfc_state_stack->previous->previous | |
6236 | && gfc_state_stack->previous->previous->state == COMP_MODULE)) | |
e14bee04 | 6237 | { |
6238 | gfc_error ("PRIVATE statement at %C is only allowed in the " | |
6239 | "specification part of a module"); | |
6240 | return MATCH_ERROR; | |
6241 | } | |
6242 | ||
4ee9c684 | 6243 | if (gfc_current_state () == COMP_DERIVED) |
6244 | { | |
6245 | if (gfc_match_eos () == MATCH_YES) | |
6246 | { | |
6247 | *st = ST_PRIVATE; | |
6248 | return MATCH_YES; | |
6249 | } | |
6250 | ||
6251 | gfc_syntax_error (ST_PRIVATE); | |
6252 | return MATCH_ERROR; | |
6253 | } | |
6254 | ||
6255 | if (gfc_match_eos () == MATCH_YES) | |
6256 | { | |
6257 | *st = ST_PRIVATE; | |
6258 | return MATCH_YES; | |
6259 | } | |
6260 | ||
6261 | *st = ST_ATTR_DECL; | |
6262 | return access_attr_decl (ST_PRIVATE); | |
6263 | } | |
6264 | ||
6265 | ||
6266 | match | |
1a9745d2 | 6267 | gfc_match_public (gfc_statement *st) |
4ee9c684 | 6268 | { |
6269 | ||
6270 | if (gfc_match ("public") != MATCH_YES) | |
6271 | return MATCH_NO; | |
6272 | ||
e14bee04 | 6273 | if (gfc_current_state () != COMP_MODULE) |
6274 | { | |
6275 | gfc_error ("PUBLIC statement at %C is only allowed in the " | |
6276 | "specification part of a module"); | |
6277 | return MATCH_ERROR; | |
6278 | } | |
6279 | ||
4ee9c684 | 6280 | if (gfc_match_eos () == MATCH_YES) |
6281 | { | |
6282 | *st = ST_PUBLIC; | |
6283 | return MATCH_YES; | |
6284 | } | |
6285 | ||
6286 | *st = ST_ATTR_DECL; | |
6287 | return access_attr_decl (ST_PUBLIC); | |
6288 | } | |
6289 | ||
6290 | ||
6291 | /* Workhorse for gfc_match_parameter. */ | |
6292 | ||
6293 | static match | |
6294 | do_parm (void) | |
6295 | { | |
6296 | gfc_symbol *sym; | |
6297 | gfc_expr *init; | |
6298 | match m; | |
f16404e3 | 6299 | gfc_try t; |
4ee9c684 | 6300 | |
6301 | m = gfc_match_symbol (&sym, 0); | |
6302 | if (m == MATCH_NO) | |
6303 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
6304 | ||
6305 | if (m != MATCH_YES) | |
6306 | return m; | |
6307 | ||
6308 | if (gfc_match_char ('=') == MATCH_NO) | |
6309 | { | |
6310 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
6311 | return MATCH_ERROR; | |
6312 | } | |
6313 | ||
6314 | m = gfc_match_init_expr (&init); | |
6315 | if (m == MATCH_NO) | |
6316 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
6317 | if (m != MATCH_YES) | |
6318 | return m; | |
6319 | ||
6320 | if (sym->ts.type == BT_UNKNOWN | |
6321 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
6322 | { | |
6323 | m = MATCH_ERROR; | |
6324 | goto cleanup; | |
6325 | } | |
6326 | ||
6327 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
950683ed | 6328 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
4ee9c684 | 6329 | { |
6330 | m = MATCH_ERROR; | |
6331 | goto cleanup; | |
6332 | } | |
6333 | ||
13aebeb0 | 6334 | if (sym->value) |
6335 | { | |
6336 | gfc_error ("Initializing already initialized variable at %C"); | |
6337 | m = MATCH_ERROR; | |
6338 | goto cleanup; | |
6339 | } | |
6340 | ||
f16404e3 | 6341 | t = add_init_expr_to_sym (sym->name, &init, &gfc_current_locus); |
6342 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
4ee9c684 | 6343 | |
6344 | cleanup: | |
6345 | gfc_free_expr (init); | |
6346 | return m; | |
6347 | } | |
6348 | ||
6349 | ||
6350 | /* Match a parameter statement, with the weird syntax that these have. */ | |
6351 | ||
6352 | match | |
6353 | gfc_match_parameter (void) | |
6354 | { | |
6355 | match m; | |
6356 | ||
6357 | if (gfc_match_char ('(') == MATCH_NO) | |
6358 | return MATCH_NO; | |
6359 | ||
6360 | for (;;) | |
6361 | { | |
6362 | m = do_parm (); | |
6363 | if (m != MATCH_YES) | |
6364 | break; | |
6365 | ||
6366 | if (gfc_match (" )%t") == MATCH_YES) | |
6367 | break; | |
6368 | ||
6369 | if (gfc_match_char (',') != MATCH_YES) | |
6370 | { | |
6371 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
6372 | m = MATCH_ERROR; | |
6373 | break; | |
6374 | } | |
6375 | } | |
6376 | ||
6377 | return m; | |
6378 | } | |
6379 | ||
6380 | ||
6381 | /* Save statements have a special syntax. */ | |
6382 | ||
6383 | match | |
6384 | gfc_match_save (void) | |
6385 | { | |
82f5ee13 | 6386 | char n[GFC_MAX_SYMBOL_LEN+1]; |
6387 | gfc_common_head *c; | |
4ee9c684 | 6388 | gfc_symbol *sym; |
6389 | match m; | |
6390 | ||
6391 | if (gfc_match_eos () == MATCH_YES) | |
6392 | { | |
6393 | if (gfc_current_ns->seen_save) | |
6394 | { | |
1a9745d2 | 6395 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
6396 | "follows previous SAVE statement") | |
76e82f95 | 6397 | == FAILURE) |
6398 | return MATCH_ERROR; | |
4ee9c684 | 6399 | } |
6400 | ||
6401 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
6402 | return MATCH_YES; | |
6403 | } | |
6404 | ||
6405 | if (gfc_current_ns->save_all) | |
6406 | { | |
1a9745d2 | 6407 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
6408 | "blanket SAVE statement") | |
76e82f95 | 6409 | == FAILURE) |
6410 | return MATCH_ERROR; | |
4ee9c684 | 6411 | } |
6412 | ||
6413 | gfc_match (" ::"); | |
6414 | ||
6415 | for (;;) | |
6416 | { | |
6417 | m = gfc_match_symbol (&sym, 0); | |
6418 | switch (m) | |
6419 | { | |
6420 | case MATCH_YES: | |
1a9745d2 | 6421 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
6422 | == FAILURE) | |
4ee9c684 | 6423 | return MATCH_ERROR; |
6424 | goto next_item; | |
6425 | ||
6426 | case MATCH_NO: | |
6427 | break; | |
6428 | ||
6429 | case MATCH_ERROR: | |
6430 | return MATCH_ERROR; | |
6431 | } | |
6432 | ||
82f5ee13 | 6433 | m = gfc_match (" / %n /", &n); |
4ee9c684 | 6434 | if (m == MATCH_ERROR) |
6435 | return MATCH_ERROR; | |
6436 | if (m == MATCH_NO) | |
6437 | goto syntax; | |
6438 | ||
403ddc45 | 6439 | c = gfc_get_common (n, 0); |
82f5ee13 | 6440 | c->saved = 1; |
6441 | ||
4ee9c684 | 6442 | gfc_current_ns->seen_save = 1; |
6443 | ||
6444 | next_item: | |
6445 | if (gfc_match_eos () == MATCH_YES) | |
6446 | break; | |
6447 | if (gfc_match_char (',') != MATCH_YES) | |
6448 | goto syntax; | |
6449 | } | |
6450 | ||
6451 | return MATCH_YES; | |
6452 | ||
6453 | syntax: | |
6454 | gfc_error ("Syntax error in SAVE statement at %C"); | |
6455 | return MATCH_ERROR; | |
6456 | } | |
6457 | ||
6458 | ||
8f6339b6 | 6459 | match |
6460 | gfc_match_value (void) | |
6461 | { | |
6462 | gfc_symbol *sym; | |
6463 | match m; | |
6464 | ||
6a7084d7 | 6465 | /* This is not allowed within a BLOCK construct! */ |
6466 | if (gfc_current_state () == COMP_BLOCK) | |
6467 | { | |
6468 | gfc_error ("VALUE is not allowed inside of BLOCK at %C"); | |
6469 | return MATCH_ERROR; | |
6470 | } | |
6471 | ||
1a9745d2 | 6472 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
8f6339b6 | 6473 | == FAILURE) |
6474 | return MATCH_ERROR; | |
6475 | ||
6476 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6477 | { | |
6478 | return MATCH_ERROR; | |
6479 | } | |
6480 | ||
6481 | if (gfc_match_eos () == MATCH_YES) | |
6482 | goto syntax; | |
6483 | ||
6484 | for(;;) | |
6485 | { | |
6486 | m = gfc_match_symbol (&sym, 0); | |
6487 | switch (m) | |
6488 | { | |
6489 | case MATCH_YES: | |
1a9745d2 | 6490 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
6491 | == FAILURE) | |
8f6339b6 | 6492 | return MATCH_ERROR; |
6493 | goto next_item; | |
6494 | ||
6495 | case MATCH_NO: | |
6496 | break; | |
6497 | ||
6498 | case MATCH_ERROR: | |
6499 | return MATCH_ERROR; | |
6500 | } | |
6501 | ||
6502 | next_item: | |
6503 | if (gfc_match_eos () == MATCH_YES) | |
6504 | break; | |
6505 | if (gfc_match_char (',') != MATCH_YES) | |
6506 | goto syntax; | |
6507 | } | |
6508 | ||
6509 | return MATCH_YES; | |
6510 | ||
6511 | syntax: | |
6512 | gfc_error ("Syntax error in VALUE statement at %C"); | |
6513 | return MATCH_ERROR; | |
6514 | } | |
6515 | ||
f6d0e37a | 6516 | |
ef814c81 | 6517 | match |
6518 | gfc_match_volatile (void) | |
6519 | { | |
6520 | gfc_symbol *sym; | |
6521 | match m; | |
6522 | ||
1a9745d2 | 6523 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
ef814c81 | 6524 | == FAILURE) |
6525 | return MATCH_ERROR; | |
6526 | ||
6527 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6528 | { | |
6529 | return MATCH_ERROR; | |
6530 | } | |
6531 | ||
6532 | if (gfc_match_eos () == MATCH_YES) | |
6533 | goto syntax; | |
6534 | ||
6535 | for(;;) | |
6536 | { | |
2f241857 | 6537 | /* VOLATILE is special because it can be added to host-associated |
6538 | symbols locally. */ | |
6539 | m = gfc_match_symbol (&sym, 1); | |
ef814c81 | 6540 | switch (m) |
6541 | { | |
6542 | case MATCH_YES: | |
1a9745d2 | 6543 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
6544 | == FAILURE) | |
ef814c81 | 6545 | return MATCH_ERROR; |
6546 | goto next_item; | |
6547 | ||
6548 | case MATCH_NO: | |
6549 | break; | |
6550 | ||
6551 | case MATCH_ERROR: | |
6552 | return MATCH_ERROR; | |
6553 | } | |
6554 | ||
6555 | next_item: | |
6556 | if (gfc_match_eos () == MATCH_YES) | |
6557 | break; | |
6558 | if (gfc_match_char (',') != MATCH_YES) | |
6559 | goto syntax; | |
6560 | } | |
6561 | ||
6562 | return MATCH_YES; | |
6563 | ||
6564 | syntax: | |
6565 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
6566 | return MATCH_ERROR; | |
6567 | } | |
6568 | ||
6569 | ||
4ee9c684 | 6570 | /* Match a module procedure statement. Note that we have to modify |
6571 | symbols in the parent's namespace because the current one was there | |
89d91d02 | 6572 | to receive symbols that are in an interface's formal argument list. */ |
4ee9c684 | 6573 | |
6574 | match | |
6575 | gfc_match_modproc (void) | |
6576 | { | |
6577 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6578 | gfc_symbol *sym; | |
6579 | match m; | |
63d42079 | 6580 | gfc_namespace *module_ns; |
94ce9f74 | 6581 | gfc_interface *old_interface_head, *interface; |
4ee9c684 | 6582 | |
6583 | if (gfc_state_stack->state != COMP_INTERFACE | |
6584 | || gfc_state_stack->previous == NULL | |
5cf92482 | 6585 | || current_interface.type == INTERFACE_NAMELESS |
6586 | || current_interface.type == INTERFACE_ABSTRACT) | |
4ee9c684 | 6587 | { |
1a9745d2 | 6588 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
6589 | "interface"); | |
4ee9c684 | 6590 | return MATCH_ERROR; |
6591 | } | |
6592 | ||
63d42079 | 6593 | module_ns = gfc_current_ns->parent; |
6594 | for (; module_ns; module_ns = module_ns->parent) | |
15ca3865 | 6595 | if (module_ns->proc_name->attr.flavor == FL_MODULE |
6596 | || module_ns->proc_name->attr.flavor == FL_PROGRAM | |
6597 | || (module_ns->proc_name->attr.flavor == FL_PROCEDURE | |
6598 | && !module_ns->proc_name->attr.contained)) | |
63d42079 | 6599 | break; |
6600 | ||
6601 | if (module_ns == NULL) | |
6602 | return MATCH_ERROR; | |
6603 | ||
94ce9f74 | 6604 | /* Store the current state of the interface. We will need it if we |
6605 | end up with a syntax error and need to recover. */ | |
6606 | old_interface_head = gfc_current_interface_head (); | |
6607 | ||
4ee9c684 | 6608 | for (;;) |
6609 | { | |
15ca3865 | 6610 | locus old_locus = gfc_current_locus; |
94ce9f74 | 6611 | bool last = false; |
6612 | ||
4ee9c684 | 6613 | m = gfc_match_name (name); |
6614 | if (m == MATCH_NO) | |
6615 | goto syntax; | |
6616 | if (m != MATCH_YES) | |
6617 | return MATCH_ERROR; | |
6618 | ||
94ce9f74 | 6619 | /* Check for syntax error before starting to add symbols to the |
6620 | current namespace. */ | |
6621 | if (gfc_match_eos () == MATCH_YES) | |
6622 | last = true; | |
6623 | if (!last && gfc_match_char (',') != MATCH_YES) | |
6624 | goto syntax; | |
6625 | ||
6626 | /* Now we're sure the syntax is valid, we process this item | |
6627 | further. */ | |
63d42079 | 6628 | if (gfc_get_symbol (name, module_ns, &sym)) |
4ee9c684 | 6629 | return MATCH_ERROR; |
6630 | ||
15ca3865 | 6631 | if (sym->attr.intrinsic) |
6632 | { | |
6633 | gfc_error ("Intrinsic procedure at %L cannot be a MODULE " | |
6634 | "PROCEDURE", &old_locus); | |
6635 | return MATCH_ERROR; | |
6636 | } | |
6637 | ||
4ee9c684 | 6638 | if (sym->attr.proc != PROC_MODULE |
950683ed | 6639 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
6640 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 6641 | return MATCH_ERROR; |
6642 | ||
6643 | if (gfc_add_interface (sym) == FAILURE) | |
6644 | return MATCH_ERROR; | |
6645 | ||
3186f695 | 6646 | sym->attr.mod_proc = 1; |
15ca3865 | 6647 | sym->declared_at = old_locus; |
3186f695 | 6648 | |
94ce9f74 | 6649 | if (last) |
4ee9c684 | 6650 | break; |
4ee9c684 | 6651 | } |
6652 | ||
6653 | return MATCH_YES; | |
6654 | ||
6655 | syntax: | |
94ce9f74 | 6656 | /* Restore the previous state of the interface. */ |
6657 | interface = gfc_current_interface_head (); | |
6658 | gfc_set_current_interface_head (old_interface_head); | |
6659 | ||
6660 | /* Free the new interfaces. */ | |
6661 | while (interface != old_interface_head) | |
6662 | { | |
6663 | gfc_interface *i = interface->next; | |
6664 | gfc_free (interface); | |
6665 | interface = i; | |
6666 | } | |
6667 | ||
6668 | /* And issue a syntax error. */ | |
4ee9c684 | 6669 | gfc_syntax_error (ST_MODULE_PROC); |
6670 | return MATCH_ERROR; | |
6671 | } | |
6672 | ||
6673 | ||
ea94d76d | 6674 | /* Check a derived type that is being extended. */ |
6675 | static gfc_symbol* | |
6676 | check_extended_derived_type (char *name) | |
6677 | { | |
6678 | gfc_symbol *extended; | |
6679 | ||
6680 | if (gfc_find_symbol (name, gfc_current_ns, 1, &extended)) | |
6681 | { | |
6682 | gfc_error ("Ambiguous symbol in TYPE definition at %C"); | |
6683 | return NULL; | |
6684 | } | |
6685 | ||
6686 | if (!extended) | |
6687 | { | |
6688 | gfc_error ("No such symbol in TYPE definition at %C"); | |
6689 | return NULL; | |
6690 | } | |
6691 | ||
6692 | if (extended->attr.flavor != FL_DERIVED) | |
6693 | { | |
6694 | gfc_error ("'%s' in EXTENDS expression at %C is not a " | |
6695 | "derived type", name); | |
6696 | return NULL; | |
6697 | } | |
6698 | ||
6699 | if (extended->attr.is_bind_c) | |
6700 | { | |
6701 | gfc_error ("'%s' cannot be extended at %C because it " | |
6702 | "is BIND(C)", extended->name); | |
6703 | return NULL; | |
6704 | } | |
6705 | ||
6706 | if (extended->attr.sequence) | |
6707 | { | |
6708 | gfc_error ("'%s' cannot be extended at %C because it " | |
6709 | "is a SEQUENCE type", extended->name); | |
6710 | return NULL; | |
6711 | } | |
6712 | ||
6713 | return extended; | |
6714 | } | |
6715 | ||
6716 | ||
c5d33754 | 6717 | /* Match the optional attribute specifiers for a type declaration. |
6718 | Return MATCH_ERROR if an error is encountered in one of the handled | |
6719 | attributes (public, private, bind(c)), MATCH_NO if what's found is | |
6720 | not a handled attribute, and MATCH_YES otherwise. TODO: More error | |
6721 | checking on attribute conflicts needs to be done. */ | |
4ee9c684 | 6722 | |
6723 | match | |
ea94d76d | 6724 | gfc_get_type_attr_spec (symbol_attribute *attr, char *name) |
4ee9c684 | 6725 | { |
c5d33754 | 6726 | /* See if the derived type is marked as private. */ |
4ee9c684 | 6727 | if (gfc_match (" , private") == MATCH_YES) |
6728 | { | |
e14bee04 | 6729 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 6730 | { |
e14bee04 | 6731 | gfc_error ("Derived type at %C can only be PRIVATE in the " |
6732 | "specification part of a module"); | |
4ee9c684 | 6733 | return MATCH_ERROR; |
6734 | } | |
6735 | ||
c5d33754 | 6736 | if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
4ee9c684 | 6737 | return MATCH_ERROR; |
4ee9c684 | 6738 | } |
c5d33754 | 6739 | else if (gfc_match (" , public") == MATCH_YES) |
4ee9c684 | 6740 | { |
e14bee04 | 6741 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 6742 | { |
e14bee04 | 6743 | gfc_error ("Derived type at %C can only be PUBLIC in the " |
6744 | "specification part of a module"); | |
4ee9c684 | 6745 | return MATCH_ERROR; |
6746 | } | |
6747 | ||
c5d33754 | 6748 | if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
4ee9c684 | 6749 | return MATCH_ERROR; |
4ee9c684 | 6750 | } |
ac5f2650 | 6751 | else if (gfc_match (" , bind ( c )") == MATCH_YES) |
c5d33754 | 6752 | { |
6753 | /* If the type is defined to be bind(c) it then needs to make | |
6754 | sure that all fields are interoperable. This will | |
6755 | need to be a semantic check on the finished derived type. | |
6756 | See 15.2.3 (lines 9-12) of F2003 draft. */ | |
6757 | if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) | |
6758 | return MATCH_ERROR; | |
6759 | ||
6760 | /* TODO: attr conflicts need to be checked, probably in symbol.c. */ | |
6761 | } | |
ac5f2650 | 6762 | else if (gfc_match (" , abstract") == MATCH_YES) |
6763 | { | |
6764 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C") | |
6765 | == FAILURE) | |
6766 | return MATCH_ERROR; | |
6767 | ||
6768 | if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE) | |
6769 | return MATCH_ERROR; | |
6770 | } | |
ea94d76d | 6771 | else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES) |
6772 | { | |
e485ad6b | 6773 | if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE) |
ea94d76d | 6774 | return MATCH_ERROR; |
6775 | } | |
c5d33754 | 6776 | else |
6777 | return MATCH_NO; | |
6778 | ||
6779 | /* If we get here, something matched. */ | |
6780 | return MATCH_YES; | |
6781 | } | |
6782 | ||
6783 | ||
5855d191 | 6784 | /* Assign a hash value for a derived type. The algorithm is that of |
6785 | SDBM. The hashed string is '[module_name #] derived_name'. */ | |
6786 | static unsigned int | |
6787 | hash_value (gfc_symbol *sym) | |
6788 | { | |
6789 | unsigned int hash = 0; | |
6790 | const char *c; | |
6791 | int i, len; | |
6792 | ||
6793 | /* Hash of the module or procedure name. */ | |
6794 | if (sym->module != NULL) | |
6795 | c = sym->module; | |
6796 | else if (sym->ns && sym->ns->proc_name | |
6797 | && sym->ns->proc_name->attr.flavor == FL_MODULE) | |
6798 | c = sym->ns->proc_name->name; | |
6799 | else | |
6800 | c = NULL; | |
6801 | ||
6802 | if (c) | |
6803 | { | |
6804 | len = strlen (c); | |
6805 | for (i = 0; i < len; i++, c++) | |
6806 | hash = (hash << 6) + (hash << 16) - hash + (*c); | |
6807 | ||
6808 | /* Disambiguate between 'a' in 'aa' and 'aa' in 'a'. */ | |
6809 | hash = (hash << 6) + (hash << 16) - hash + '#'; | |
6810 | } | |
6811 | ||
6812 | /* Hash of the derived type name. */ | |
6813 | len = strlen (sym->name); | |
6814 | c = sym->name; | |
6815 | for (i = 0; i < len; i++, c++) | |
6816 | hash = (hash << 6) + (hash << 16) - hash + (*c); | |
6817 | ||
6818 | /* Return the hash but take the modulus for the sake of module read, | |
6819 | even though this slightly increases the chance of collision. */ | |
6820 | return (hash % 100000000); | |
6821 | } | |
1de1b1a9 | 6822 | |
6823 | ||
c5d33754 | 6824 | /* Match the beginning of a derived type declaration. If a type name |
6825 | was the result of a function, then it is possible to have a symbol | |
6826 | already to be known as a derived type yet have no components. */ | |
6827 | ||
6828 | match | |
6829 | gfc_match_derived_decl (void) | |
6830 | { | |
6831 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
ea94d76d | 6832 | char parent[GFC_MAX_SYMBOL_LEN + 1]; |
c5d33754 | 6833 | symbol_attribute attr; |
6834 | gfc_symbol *sym; | |
ea94d76d | 6835 | gfc_symbol *extended; |
c5d33754 | 6836 | match m; |
6837 | match is_type_attr_spec = MATCH_NO; | |
33e86520 | 6838 | bool seen_attr = false; |
c5d33754 | 6839 | |
6840 | if (gfc_current_state () == COMP_DERIVED) | |
6841 | return MATCH_NO; | |
6842 | ||
ea94d76d | 6843 | name[0] = '\0'; |
6844 | parent[0] = '\0'; | |
c5d33754 | 6845 | gfc_clear_attr (&attr); |
ea94d76d | 6846 | extended = NULL; |
c5d33754 | 6847 | |
6848 | do | |
6849 | { | |
ea94d76d | 6850 | is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent); |
c5d33754 | 6851 | if (is_type_attr_spec == MATCH_ERROR) |
6852 | return MATCH_ERROR; | |
33e86520 | 6853 | if (is_type_attr_spec == MATCH_YES) |
6854 | seen_attr = true; | |
c5d33754 | 6855 | } while (is_type_attr_spec == MATCH_YES); |
4ee9c684 | 6856 | |
e485ad6b | 6857 | /* Deal with derived type extensions. The extension attribute has |
6858 | been added to 'attr' but now the parent type must be found and | |
6859 | checked. */ | |
ea94d76d | 6860 | if (parent[0]) |
6861 | extended = check_extended_derived_type (parent); | |
6862 | ||
6863 | if (parent[0] && !extended) | |
6864 | return MATCH_ERROR; | |
6865 | ||
33e86520 | 6866 | if (gfc_match (" ::") != MATCH_YES && seen_attr) |
4ee9c684 | 6867 | { |
6868 | gfc_error ("Expected :: in TYPE definition at %C"); | |
6869 | return MATCH_ERROR; | |
6870 | } | |
6871 | ||
6872 | m = gfc_match (" %n%t", name); | |
6873 | if (m != MATCH_YES) | |
6874 | return m; | |
6875 | ||
a3055431 | 6876 | /* Make sure the name is not the name of an intrinsic type. */ |
6877 | if (gfc_is_intrinsic_typename (name)) | |
4ee9c684 | 6878 | { |
1a9745d2 | 6879 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
6880 | "type", name); | |
4ee9c684 | 6881 | return MATCH_ERROR; |
6882 | } | |
6883 | ||
6884 | if (gfc_get_symbol (name, NULL, &sym)) | |
6885 | return MATCH_ERROR; | |
6886 | ||
6887 | if (sym->ts.type != BT_UNKNOWN) | |
6888 | { | |
6889 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
6890 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
6891 | return MATCH_ERROR; | |
6892 | } | |
6893 | ||
6894 | /* The symbol may already have the derived attribute without the | |
6895 | components. The ways this can happen is via a function | |
6896 | definition, an INTRINSIC statement or a subtype in another | |
6897 | derived type that is a pointer. The first part of the AND clause | |
69b1505f | 6898 | is true if the symbol is not the return value of a function. */ |
4ee9c684 | 6899 | if (sym->attr.flavor != FL_DERIVED |
950683ed | 6900 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 6901 | return MATCH_ERROR; |
6902 | ||
e6b82afc | 6903 | if (sym->components != NULL || sym->attr.zero_comp) |
4ee9c684 | 6904 | { |
1a9745d2 | 6905 | gfc_error ("Derived type definition of '%s' at %C has already been " |
6906 | "defined", sym->name); | |
4ee9c684 | 6907 | return MATCH_ERROR; |
6908 | } | |
6909 | ||
6910 | if (attr.access != ACCESS_UNKNOWN | |
950683ed | 6911 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
4ee9c684 | 6912 | return MATCH_ERROR; |
6913 | ||
c5d33754 | 6914 | /* See if the derived type was labeled as bind(c). */ |
6915 | if (attr.is_bind_c != 0) | |
6916 | sym->attr.is_bind_c = attr.is_bind_c; | |
6917 | ||
223f0f57 | 6918 | /* Construct the f2k_derived namespace if it is not yet there. */ |
6919 | if (!sym->f2k_derived) | |
6920 | sym->f2k_derived = gfc_get_namespace (NULL, 0); | |
ea94d76d | 6921 | |
6922 | if (extended && !sym->components) | |
6923 | { | |
6924 | gfc_component *p; | |
6925 | gfc_symtree *st; | |
6926 | ||
6927 | /* Add the extended derived type as the first component. */ | |
6928 | gfc_add_component (sym, parent, &p); | |
e485ad6b | 6929 | sym->attr.extension = attr.extension; |
ea94d76d | 6930 | extended->refs++; |
6931 | gfc_set_sym_referenced (extended); | |
6932 | ||
6933 | p->ts.type = BT_DERIVED; | |
eeebe20b | 6934 | p->ts.u.derived = extended; |
ea94d76d | 6935 | p->initializer = gfc_default_initializer (&p->ts); |
6936 | ||
6937 | /* Provide the links between the extended type and its extension. */ | |
6938 | if (!extended->f2k_derived) | |
6939 | extended->f2k_derived = gfc_get_namespace (NULL, 0); | |
6940 | st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name); | |
6941 | st->n.sym = sym; | |
6942 | } | |
6943 | ||
1de1b1a9 | 6944 | if (!sym->vindex) |
5855d191 | 6945 | /* Set the vindex for this type. */ |
6946 | sym->vindex = hash_value (sym); | |
1de1b1a9 | 6947 | |
ac5f2650 | 6948 | /* Take over the ABSTRACT attribute. */ |
6949 | sym->attr.abstract = attr.abstract; | |
6950 | ||
4ee9c684 | 6951 | gfc_new_block = sym; |
6952 | ||
6953 | return MATCH_YES; | |
6954 | } | |
b549d2a5 | 6955 | |
6956 | ||
6957 | /* Cray Pointees can be declared as: | |
6958 | pointer (ipt, a (n,m,...,*)) | |
6959 | By default, this is treated as an AS_ASSUMED_SIZE array. We'll | |
6960 | cheat and set a constant bound of 1 for the last dimension, if this | |
6961 | is the case. Since there is no bounds-checking for Cray Pointees, | |
6962 | this will be okay. */ | |
6963 | ||
8458f4ca | 6964 | match |
b549d2a5 | 6965 | gfc_mod_pointee_as (gfc_array_spec *as) |
6966 | { | |
6967 | as->cray_pointee = true; /* This will be useful to know later. */ | |
6968 | if (as->type == AS_ASSUMED_SIZE) | |
6969 | { | |
6970 | as->type = AS_EXPLICIT; | |
6971 | as->upper[as->rank - 1] = gfc_int_expr (1); | |
6972 | as->cp_was_assumed = true; | |
6973 | } | |
6974 | else if (as->type == AS_ASSUMED_SHAPE) | |
6975 | { | |
6976 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
6977 | return MATCH_ERROR; | |
6978 | } | |
6979 | return MATCH_YES; | |
6980 | } | |
3b6a4b41 | 6981 | |
6982 | ||
6983 | /* Match the enum definition statement, here we are trying to match | |
6984 | the first line of enum definition statement. | |
6985 | Returns MATCH_YES if match is found. */ | |
6986 | ||
6987 | match | |
6988 | gfc_match_enum (void) | |
6989 | { | |
6990 | match m; | |
6991 | ||
6992 | m = gfc_match_eos (); | |
6993 | if (m != MATCH_YES) | |
6994 | return m; | |
6995 | ||
60fbbf9e | 6996 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") |
3b6a4b41 | 6997 | == FAILURE) |
6998 | return MATCH_ERROR; | |
6999 | ||
7000 | return MATCH_YES; | |
7001 | } | |
7002 | ||
7003 | ||
fe1328da | 7004 | /* Returns an initializer whose value is one higher than the value of the |
7005 | LAST_INITIALIZER argument. If the argument is NULL, the | |
7006 | initializers value will be set to zero. The initializer's kind | |
7007 | will be set to gfc_c_int_kind. | |
7008 | ||
7009 | If -fshort-enums is given, the appropriate kind will be selected | |
7010 | later after all enumerators have been parsed. A warning is issued | |
7011 | here if an initializer exceeds gfc_c_int_kind. */ | |
7012 | ||
7013 | static gfc_expr * | |
7014 | enum_initializer (gfc_expr *last_initializer, locus where) | |
7015 | { | |
7016 | gfc_expr *result; | |
7017 | ||
7018 | result = gfc_get_expr (); | |
7019 | result->expr_type = EXPR_CONSTANT; | |
7020 | result->ts.type = BT_INTEGER; | |
7021 | result->ts.kind = gfc_c_int_kind; | |
7022 | result->where = where; | |
7023 | ||
7024 | mpz_init (result->value.integer); | |
7025 | ||
7026 | if (last_initializer != NULL) | |
7027 | { | |
7028 | mpz_add_ui (result->value.integer, last_initializer->value.integer, 1); | |
7029 | result->where = last_initializer->where; | |
7030 | ||
7031 | if (gfc_check_integer_range (result->value.integer, | |
7032 | gfc_c_int_kind) != ARITH_OK) | |
7033 | { | |
7034 | gfc_error ("Enumerator exceeds the C integer type at %C"); | |
7035 | return NULL; | |
7036 | } | |
7037 | } | |
7038 | else | |
7039 | { | |
7040 | /* Control comes here, if it's the very first enumerator and no | |
7041 | initializer has been given. It will be initialized to zero. */ | |
7042 | mpz_set_si (result->value.integer, 0); | |
7043 | } | |
7044 | ||
7045 | return result; | |
7046 | } | |
7047 | ||
7048 | ||
60fbbf9e | 7049 | /* Match a variable name with an optional initializer. When this |
7050 | subroutine is called, a variable is expected to be parsed next. | |
7051 | Depending on what is happening at the moment, updates either the | |
7052 | symbol table or the current interface. */ | |
7053 | ||
7054 | static match | |
7055 | enumerator_decl (void) | |
7056 | { | |
7057 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7058 | gfc_expr *initializer; | |
7059 | gfc_array_spec *as = NULL; | |
7060 | gfc_symbol *sym; | |
7061 | locus var_locus; | |
7062 | match m; | |
f6bb8f4b | 7063 | gfc_try t; |
60fbbf9e | 7064 | locus old_locus; |
7065 | ||
7066 | initializer = NULL; | |
7067 | old_locus = gfc_current_locus; | |
7068 | ||
7069 | /* When we get here, we've just matched a list of attributes and | |
7070 | maybe a type and a double colon. The next thing we expect to see | |
7071 | is the name of the symbol. */ | |
7072 | m = gfc_match_name (name); | |
7073 | if (m != MATCH_YES) | |
7074 | goto cleanup; | |
7075 | ||
7076 | var_locus = gfc_current_locus; | |
7077 | ||
7078 | /* OK, we've successfully matched the declaration. Now put the | |
7079 | symbol in the current namespace. If we fail to create the symbol, | |
7080 | bail out. */ | |
7081 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
7082 | { | |
7083 | m = MATCH_ERROR; | |
7084 | goto cleanup; | |
7085 | } | |
7086 | ||
7087 | /* The double colon must be present in order to have initializers. | |
7088 | Otherwise the statement is ambiguous with an assignment statement. */ | |
7089 | if (colon_seen) | |
7090 | { | |
7091 | if (gfc_match_char ('=') == MATCH_YES) | |
7092 | { | |
7093 | m = gfc_match_init_expr (&initializer); | |
7094 | if (m == MATCH_NO) | |
7095 | { | |
7096 | gfc_error ("Expected an initialization expression at %C"); | |
7097 | m = MATCH_ERROR; | |
7098 | } | |
7099 | ||
7100 | if (m != MATCH_YES) | |
7101 | goto cleanup; | |
7102 | } | |
7103 | } | |
7104 | ||
7105 | /* If we do not have an initializer, the initialization value of the | |
7106 | previous enumerator (stored in last_initializer) is incremented | |
7107 | by 1 and is used to initialize the current enumerator. */ | |
7108 | if (initializer == NULL) | |
fe1328da | 7109 | initializer = enum_initializer (last_initializer, old_locus); |
e14bee04 | 7110 | |
60fbbf9e | 7111 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
7112 | { | |
7113 | gfc_error("ENUMERATOR %L not initialized with integer expression", | |
7114 | &var_locus); | |
e14bee04 | 7115 | m = MATCH_ERROR; |
60fbbf9e | 7116 | gfc_free_enum_history (); |
7117 | goto cleanup; | |
7118 | } | |
7119 | ||
7120 | /* Store this current initializer, for the next enumerator variable | |
7121 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
7122 | use last_initializer below. */ | |
7123 | last_initializer = initializer; | |
7124 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
7125 | ||
7126 | /* Maintain enumerator history. */ | |
7127 | gfc_find_symbol (name, NULL, 0, &sym); | |
7128 | create_enum_history (sym, last_initializer); | |
7129 | ||
7130 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
7131 | ||
7132 | cleanup: | |
7133 | /* Free stuff up and return. */ | |
7134 | gfc_free_expr (initializer); | |
7135 | ||
7136 | return m; | |
7137 | } | |
7138 | ||
7139 | ||
f6d0e37a | 7140 | /* Match the enumerator definition statement. */ |
3b6a4b41 | 7141 | |
7142 | match | |
7143 | gfc_match_enumerator_def (void) | |
7144 | { | |
7145 | match m; | |
f6bb8f4b | 7146 | gfc_try t; |
e14bee04 | 7147 | |
3b6a4b41 | 7148 | gfc_clear_ts (¤t_ts); |
e14bee04 | 7149 | |
3b6a4b41 | 7150 | m = gfc_match (" enumerator"); |
7151 | if (m != MATCH_YES) | |
7152 | return m; | |
60fbbf9e | 7153 | |
7154 | m = gfc_match (" :: "); | |
7155 | if (m == MATCH_ERROR) | |
7156 | return m; | |
7157 | ||
7158 | colon_seen = (m == MATCH_YES); | |
e14bee04 | 7159 | |
3b6a4b41 | 7160 | if (gfc_current_state () != COMP_ENUM) |
7161 | { | |
7162 | gfc_error ("ENUM definition statement expected before %C"); | |
7163 | gfc_free_enum_history (); | |
7164 | return MATCH_ERROR; | |
7165 | } | |
7166 | ||
7167 | (¤t_ts)->type = BT_INTEGER; | |
7168 | (¤t_ts)->kind = gfc_c_int_kind; | |
e14bee04 | 7169 | |
60fbbf9e | 7170 | gfc_clear_attr (¤t_attr); |
7171 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
7172 | if (t == FAILURE) | |
3b6a4b41 | 7173 | { |
60fbbf9e | 7174 | m = MATCH_ERROR; |
3b6a4b41 | 7175 | goto cleanup; |
7176 | } | |
7177 | ||
3b6a4b41 | 7178 | for (;;) |
7179 | { | |
60fbbf9e | 7180 | m = enumerator_decl (); |
3b6a4b41 | 7181 | if (m == MATCH_ERROR) |
7182 | goto cleanup; | |
7183 | if (m == MATCH_NO) | |
7184 | break; | |
7185 | ||
7186 | if (gfc_match_eos () == MATCH_YES) | |
7187 | goto cleanup; | |
7188 | if (gfc_match_char (',') != MATCH_YES) | |
7189 | break; | |
7190 | } | |
7191 | ||
7192 | if (gfc_current_state () == COMP_ENUM) | |
7193 | { | |
7194 | gfc_free_enum_history (); | |
7195 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
7196 | m = MATCH_ERROR; | |
7197 | } | |
7198 | ||
7199 | cleanup: | |
7200 | gfc_free_array_spec (current_as); | |
7201 | current_as = NULL; | |
7202 | return m; | |
7203 | ||
7204 | } | |
7205 | ||
e449e4dd | 7206 | |
7fd88f6e | 7207 | /* Match binding attributes. */ |
7208 | ||
7209 | static match | |
64e93293 | 7210 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc) |
7fd88f6e | 7211 | { |
7212 | bool found_passing = false; | |
64e93293 | 7213 | bool seen_ptr = false; |
fe9b08a2 | 7214 | match m = MATCH_YES; |
7fd88f6e | 7215 | |
7216 | /* Intialize to defaults. Do so even before the MATCH_NO check so that in | |
7217 | this case the defaults are in there. */ | |
7218 | ba->access = ACCESS_UNKNOWN; | |
7219 | ba->pass_arg = NULL; | |
7220 | ba->pass_arg_num = 0; | |
7221 | ba->nopass = 0; | |
7222 | ba->non_overridable = 0; | |
61c3b81d | 7223 | ba->deferred = 0; |
fe9b08a2 | 7224 | ba->ppc = ppc; |
7fd88f6e | 7225 | |
7226 | /* If we find a comma, we believe there are binding attributes. */ | |
fe9b08a2 | 7227 | m = gfc_match_char (','); |
7228 | if (m == MATCH_NO) | |
7229 | goto done; | |
7fd88f6e | 7230 | |
7231 | do | |
7232 | { | |
e2f06a48 | 7233 | /* Access specifier. */ |
7234 | ||
7235 | m = gfc_match (" public"); | |
7fd88f6e | 7236 | if (m == MATCH_ERROR) |
7237 | goto error; | |
7238 | if (m == MATCH_YES) | |
7239 | { | |
e2f06a48 | 7240 | if (ba->access != ACCESS_UNKNOWN) |
7fd88f6e | 7241 | { |
e2f06a48 | 7242 | gfc_error ("Duplicate access-specifier at %C"); |
7fd88f6e | 7243 | goto error; |
7244 | } | |
7245 | ||
e2f06a48 | 7246 | ba->access = ACCESS_PUBLIC; |
7fd88f6e | 7247 | continue; |
7248 | } | |
7249 | ||
e2f06a48 | 7250 | m = gfc_match (" private"); |
7fd88f6e | 7251 | if (m == MATCH_ERROR) |
7252 | goto error; | |
7253 | if (m == MATCH_YES) | |
7254 | { | |
e2f06a48 | 7255 | if (ba->access != ACCESS_UNKNOWN) |
7fd88f6e | 7256 | { |
e2f06a48 | 7257 | gfc_error ("Duplicate access-specifier at %C"); |
7fd88f6e | 7258 | goto error; |
7259 | } | |
7260 | ||
e2f06a48 | 7261 | ba->access = ACCESS_PRIVATE; |
7fd88f6e | 7262 | continue; |
7263 | } | |
7264 | ||
e2f06a48 | 7265 | /* If inside GENERIC, the following is not allowed. */ |
7266 | if (!generic) | |
7fd88f6e | 7267 | { |
7fd88f6e | 7268 | |
e2f06a48 | 7269 | /* NOPASS flag. */ |
7270 | m = gfc_match (" nopass"); | |
7271 | if (m == MATCH_ERROR) | |
7272 | goto error; | |
7273 | if (m == MATCH_YES) | |
7fd88f6e | 7274 | { |
e2f06a48 | 7275 | if (found_passing) |
7276 | { | |
7277 | gfc_error ("Binding attributes already specify passing," | |
7278 | " illegal NOPASS at %C"); | |
7279 | goto error; | |
7280 | } | |
7281 | ||
7282 | found_passing = true; | |
7283 | ba->nopass = 1; | |
7284 | continue; | |
7fd88f6e | 7285 | } |
7286 | ||
e2f06a48 | 7287 | /* PASS possibly including argument. */ |
7288 | m = gfc_match (" pass"); | |
7289 | if (m == MATCH_ERROR) | |
7290 | goto error; | |
7291 | if (m == MATCH_YES) | |
7fd88f6e | 7292 | { |
e2f06a48 | 7293 | char arg[GFC_MAX_SYMBOL_LEN + 1]; |
7294 | ||
7295 | if (found_passing) | |
7296 | { | |
7297 | gfc_error ("Binding attributes already specify passing," | |
7298 | " illegal PASS at %C"); | |
7299 | goto error; | |
7300 | } | |
7301 | ||
7302 | m = gfc_match (" ( %n )", arg); | |
7303 | if (m == MATCH_ERROR) | |
7304 | goto error; | |
7305 | if (m == MATCH_YES) | |
fe9b08a2 | 7306 | ba->pass_arg = gfc_get_string (arg); |
e2f06a48 | 7307 | gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL)); |
7308 | ||
7309 | found_passing = true; | |
7310 | ba->nopass = 0; | |
7311 | continue; | |
7fd88f6e | 7312 | } |
7313 | ||
64e93293 | 7314 | if (ppc) |
7315 | { | |
7316 | /* POINTER flag. */ | |
7317 | m = gfc_match (" pointer"); | |
7318 | if (m == MATCH_ERROR) | |
7319 | goto error; | |
7320 | if (m == MATCH_YES) | |
7321 | { | |
7322 | if (seen_ptr) | |
7323 | { | |
7324 | gfc_error ("Duplicate POINTER attribute at %C"); | |
7325 | goto error; | |
7326 | } | |
7327 | ||
7328 | seen_ptr = true; | |
64e93293 | 7329 | continue; |
7330 | } | |
7331 | } | |
7332 | else | |
7333 | { | |
7334 | /* NON_OVERRIDABLE flag. */ | |
7335 | m = gfc_match (" non_overridable"); | |
7336 | if (m == MATCH_ERROR) | |
7337 | goto error; | |
7338 | if (m == MATCH_YES) | |
7339 | { | |
7340 | if (ba->non_overridable) | |
7341 | { | |
7342 | gfc_error ("Duplicate NON_OVERRIDABLE at %C"); | |
7343 | goto error; | |
7344 | } | |
7345 | ||
7346 | ba->non_overridable = 1; | |
7347 | continue; | |
7348 | } | |
7349 | ||
7350 | /* DEFERRED flag. */ | |
7351 | m = gfc_match (" deferred"); | |
7352 | if (m == MATCH_ERROR) | |
7353 | goto error; | |
7354 | if (m == MATCH_YES) | |
7355 | { | |
7356 | if (ba->deferred) | |
7357 | { | |
7358 | gfc_error ("Duplicate DEFERRED at %C"); | |
7359 | goto error; | |
7360 | } | |
7361 | ||
7362 | ba->deferred = 1; | |
7363 | continue; | |
7364 | } | |
7365 | } | |
7366 | ||
7fd88f6e | 7367 | } |
7368 | ||
7369 | /* Nothing matching found. */ | |
e2f06a48 | 7370 | if (generic) |
7371 | gfc_error ("Expected access-specifier at %C"); | |
7372 | else | |
7373 | gfc_error ("Expected binding attribute at %C"); | |
7fd88f6e | 7374 | goto error; |
7375 | } | |
7376 | while (gfc_match_char (',') == MATCH_YES); | |
7377 | ||
61c3b81d | 7378 | /* NON_OVERRIDABLE and DEFERRED exclude themselves. */ |
7379 | if (ba->non_overridable && ba->deferred) | |
7380 | { | |
7381 | gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C"); | |
7382 | goto error; | |
7383 | } | |
7384 | ||
fe9b08a2 | 7385 | m = MATCH_YES; |
7386 | ||
7387 | done: | |
e2f06a48 | 7388 | if (ba->access == ACCESS_UNKNOWN) |
7389 | ba->access = gfc_typebound_default_access; | |
7390 | ||
64e93293 | 7391 | if (ppc && !seen_ptr) |
7392 | { | |
7393 | gfc_error ("POINTER attribute is required for procedure pointer component" | |
7394 | " at %C"); | |
7395 | goto error; | |
7396 | } | |
7397 | ||
fe9b08a2 | 7398 | return m; |
7fd88f6e | 7399 | |
7400 | error: | |
7fd88f6e | 7401 | return MATCH_ERROR; |
7402 | } | |
7403 | ||
7404 | ||
7405 | /* Match a PROCEDURE specific binding inside a derived type. */ | |
7406 | ||
7407 | static match | |
7408 | match_procedure_in_type (void) | |
7409 | { | |
7410 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7411 | char target_buf[GFC_MAX_SYMBOL_LEN + 1]; | |
61c3b81d | 7412 | char* target = NULL; |
7fd88f6e | 7413 | gfc_typebound_proc* tb; |
7414 | bool seen_colons; | |
7415 | bool seen_attrs; | |
7416 | match m; | |
7417 | gfc_symtree* stree; | |
7418 | gfc_namespace* ns; | |
7419 | gfc_symbol* block; | |
7420 | ||
7421 | /* Check current state. */ | |
7422 | gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS); | |
7423 | block = gfc_state_stack->previous->sym; | |
7424 | gcc_assert (block); | |
7425 | ||
61c3b81d | 7426 | /* Try to match PROCEDURE(interface). */ |
7fd88f6e | 7427 | if (gfc_match (" (") == MATCH_YES) |
7428 | { | |
61c3b81d | 7429 | m = gfc_match_name (target_buf); |
7430 | if (m == MATCH_ERROR) | |
7431 | return m; | |
7432 | if (m != MATCH_YES) | |
7433 | { | |
7434 | gfc_error ("Interface-name expected after '(' at %C"); | |
7435 | return MATCH_ERROR; | |
7436 | } | |
7437 | ||
7438 | if (gfc_match (" )") != MATCH_YES) | |
7439 | { | |
7440 | gfc_error ("')' expected at %C"); | |
7441 | return MATCH_ERROR; | |
7442 | } | |
7443 | ||
7444 | target = target_buf; | |
7fd88f6e | 7445 | } |
7446 | ||
7447 | /* Construct the data structure. */ | |
930fe1de | 7448 | tb = gfc_get_typebound_proc (); |
7fd88f6e | 7449 | tb->where = gfc_current_locus; |
e2f06a48 | 7450 | tb->is_generic = 0; |
7fd88f6e | 7451 | |
7452 | /* Match binding attributes. */ | |
64e93293 | 7453 | m = match_binding_attributes (tb, false, false); |
7fd88f6e | 7454 | if (m == MATCH_ERROR) |
7455 | return m; | |
7456 | seen_attrs = (m == MATCH_YES); | |
7457 | ||
61c3b81d | 7458 | /* Check that attribute DEFERRED is given iff an interface is specified, which |
7459 | means target != NULL. */ | |
7460 | if (tb->deferred && !target) | |
7461 | { | |
7462 | gfc_error ("Interface must be specified for DEFERRED binding at %C"); | |
7463 | return MATCH_ERROR; | |
7464 | } | |
7465 | if (target && !tb->deferred) | |
7466 | { | |
7467 | gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED"); | |
7468 | return MATCH_ERROR; | |
7469 | } | |
7470 | ||
7fd88f6e | 7471 | /* Match the colons. */ |
7472 | m = gfc_match (" ::"); | |
7473 | if (m == MATCH_ERROR) | |
7474 | return m; | |
7475 | seen_colons = (m == MATCH_YES); | |
7476 | if (seen_attrs && !seen_colons) | |
7477 | { | |
7478 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
7479 | return MATCH_ERROR; | |
7480 | } | |
7481 | ||
7482 | /* Match the binding name. */ | |
7483 | m = gfc_match_name (name); | |
7484 | if (m == MATCH_ERROR) | |
7485 | return m; | |
7486 | if (m == MATCH_NO) | |
7487 | { | |
7488 | gfc_error ("Expected binding name at %C"); | |
7489 | return MATCH_ERROR; | |
7490 | } | |
7491 | ||
7492 | /* Try to match the '=> target', if it's there. */ | |
7fd88f6e | 7493 | m = gfc_match (" =>"); |
7494 | if (m == MATCH_ERROR) | |
7495 | return m; | |
7496 | if (m == MATCH_YES) | |
7497 | { | |
61c3b81d | 7498 | if (tb->deferred) |
7499 | { | |
7500 | gfc_error ("'=> target' is invalid for DEFERRED binding at %C"); | |
7501 | return MATCH_ERROR; | |
7502 | } | |
7503 | ||
7fd88f6e | 7504 | if (!seen_colons) |
7505 | { | |
7506 | gfc_error ("'::' needed in PROCEDURE binding with explicit target" | |
7507 | " at %C"); | |
7508 | return MATCH_ERROR; | |
7509 | } | |
7510 | ||
7511 | m = gfc_match_name (target_buf); | |
7512 | if (m == MATCH_ERROR) | |
7513 | return m; | |
7514 | if (m == MATCH_NO) | |
7515 | { | |
7516 | gfc_error ("Expected binding target after '=>' at %C"); | |
7517 | return MATCH_ERROR; | |
7518 | } | |
7519 | target = target_buf; | |
7520 | } | |
7521 | ||
7522 | /* Now we should have the end. */ | |
7523 | m = gfc_match_eos (); | |
7524 | if (m == MATCH_ERROR) | |
7525 | return m; | |
7526 | if (m == MATCH_NO) | |
7527 | { | |
7528 | gfc_error ("Junk after PROCEDURE declaration at %C"); | |
7529 | return MATCH_ERROR; | |
7530 | } | |
7531 | ||
7532 | /* If no target was found, it has the same name as the binding. */ | |
7533 | if (!target) | |
7534 | target = name; | |
7535 | ||
7536 | /* Get the namespace to insert the symbols into. */ | |
7537 | ns = block->f2k_derived; | |
7538 | gcc_assert (ns); | |
7539 | ||
61c3b81d | 7540 | /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */ |
7541 | if (tb->deferred && !block->attr.abstract) | |
7542 | { | |
7543 | gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT", | |
7544 | block->name); | |
7545 | return MATCH_ERROR; | |
7546 | } | |
7547 | ||
7fd88f6e | 7548 | /* See if we already have a binding with this name in the symtree which would |
e2f06a48 | 7549 | be an error. If a GENERIC already targetted this binding, it may be |
7550 | already there but then typebound is still NULL. */ | |
3323e9b1 | 7551 | stree = gfc_find_symtree (ns->tb_sym_root, name); |
7552 | if (stree && stree->n.tb) | |
7fd88f6e | 7553 | { |
7554 | gfc_error ("There's already a procedure with binding name '%s' for the" | |
7555 | " derived type '%s' at %C", name, block->name); | |
7556 | return MATCH_ERROR; | |
7557 | } | |
7558 | ||
7559 | /* Insert it and set attributes. */ | |
3323e9b1 | 7560 | |
7561 | if (!stree) | |
7562 | { | |
7563 | stree = gfc_new_symtree (&ns->tb_sym_root, name); | |
7564 | gcc_assert (stree); | |
7565 | } | |
7566 | stree->n.tb = tb; | |
7567 | ||
36b0a1b0 | 7568 | if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific, false)) |
7fd88f6e | 7569 | return MATCH_ERROR; |
e2f06a48 | 7570 | gfc_set_sym_referenced (tb->u.specific->n.sym); |
7fd88f6e | 7571 | |
7572 | return MATCH_YES; | |
7573 | } | |
7574 | ||
7575 | ||
e2f06a48 | 7576 | /* Match a GENERIC procedure binding inside a derived type. */ |
7577 | ||
7578 | match | |
7579 | gfc_match_generic (void) | |
7580 | { | |
7581 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
a36eb9ee | 7582 | char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */ |
e2f06a48 | 7583 | gfc_symbol* block; |
7584 | gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */ | |
7585 | gfc_typebound_proc* tb; | |
e2f06a48 | 7586 | gfc_namespace* ns; |
a36eb9ee | 7587 | interface_type op_type; |
7588 | gfc_intrinsic_op op; | |
e2f06a48 | 7589 | match m; |
7590 | ||
7591 | /* Check current state. */ | |
7592 | if (gfc_current_state () == COMP_DERIVED) | |
7593 | { | |
7594 | gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS"); | |
7595 | return MATCH_ERROR; | |
7596 | } | |
7597 | if (gfc_current_state () != COMP_DERIVED_CONTAINS) | |
7598 | return MATCH_NO; | |
7599 | block = gfc_state_stack->previous->sym; | |
7600 | ns = block->f2k_derived; | |
7601 | gcc_assert (block && ns); | |
7602 | ||
7603 | /* See if we get an access-specifier. */ | |
64e93293 | 7604 | m = match_binding_attributes (&tbattr, true, false); |
e2f06a48 | 7605 | if (m == MATCH_ERROR) |
7606 | goto error; | |
7607 | ||
7608 | /* Now the colons, those are required. */ | |
7609 | if (gfc_match (" ::") != MATCH_YES) | |
7610 | { | |
7611 | gfc_error ("Expected '::' at %C"); | |
7612 | goto error; | |
7613 | } | |
7614 | ||
a36eb9ee | 7615 | /* Match the binding name; depending on type (operator / generic) format |
7616 | it for future error messages into bind_name. */ | |
7617 | ||
7618 | m = gfc_match_generic_spec (&op_type, name, &op); | |
e2f06a48 | 7619 | if (m == MATCH_ERROR) |
7620 | return MATCH_ERROR; | |
7621 | if (m == MATCH_NO) | |
7622 | { | |
a36eb9ee | 7623 | gfc_error ("Expected generic name or operator descriptor at %C"); |
e2f06a48 | 7624 | goto error; |
7625 | } | |
7626 | ||
a36eb9ee | 7627 | switch (op_type) |
e2f06a48 | 7628 | { |
a36eb9ee | 7629 | case INTERFACE_GENERIC: |
7630 | snprintf (bind_name, sizeof (bind_name), "%s", name); | |
7631 | break; | |
7632 | ||
7633 | case INTERFACE_USER_OP: | |
7634 | snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name); | |
7635 | break; | |
7636 | ||
7637 | case INTERFACE_INTRINSIC_OP: | |
7638 | snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)", | |
7639 | gfc_op2string (op)); | |
7640 | break; | |
7641 | ||
7642 | default: | |
7643 | gcc_unreachable (); | |
7644 | } | |
3323e9b1 | 7645 | |
a36eb9ee | 7646 | /* Match the required =>. */ |
7647 | if (gfc_match (" =>") != MATCH_YES) | |
7648 | { | |
7649 | gfc_error ("Expected '=>' at %C"); | |
7650 | goto error; | |
7651 | } | |
7652 | ||
7653 | /* Try to find existing GENERIC binding with this name / for this operator; | |
7654 | if there is something, check that it is another GENERIC and then extend | |
7655 | it rather than building a new node. Otherwise, create it and put it | |
7656 | at the right position. */ | |
7657 | ||
7658 | switch (op_type) | |
7659 | { | |
7660 | case INTERFACE_USER_OP: | |
7661 | case INTERFACE_GENERIC: | |
7662 | { | |
7663 | const bool is_op = (op_type == INTERFACE_USER_OP); | |
7664 | gfc_symtree* st; | |
7665 | ||
7666 | st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name); | |
7667 | if (st) | |
7668 | { | |
7669 | tb = st->n.tb; | |
7670 | gcc_assert (tb); | |
7671 | } | |
7672 | else | |
7673 | tb = NULL; | |
7674 | ||
7675 | break; | |
7676 | } | |
7677 | ||
7678 | case INTERFACE_INTRINSIC_OP: | |
7679 | tb = ns->tb_op[op]; | |
7680 | break; | |
7681 | ||
7682 | default: | |
7683 | gcc_unreachable (); | |
7684 | } | |
7685 | ||
7686 | if (tb) | |
7687 | { | |
3323e9b1 | 7688 | if (!tb->is_generic) |
e2f06a48 | 7689 | { |
a36eb9ee | 7690 | gcc_assert (op_type == INTERFACE_GENERIC); |
e2f06a48 | 7691 | gfc_error ("There's already a non-generic procedure with binding name" |
7692 | " '%s' for the derived type '%s' at %C", | |
a36eb9ee | 7693 | bind_name, block->name); |
e2f06a48 | 7694 | goto error; |
7695 | } | |
7696 | ||
e2f06a48 | 7697 | if (tb->access != tbattr.access) |
7698 | { | |
7699 | gfc_error ("Binding at %C must have the same access as already" | |
a36eb9ee | 7700 | " defined binding '%s'", bind_name); |
e2f06a48 | 7701 | goto error; |
7702 | } | |
7703 | } | |
7704 | else | |
7705 | { | |
a36eb9ee | 7706 | tb = gfc_get_typebound_proc (); |
e2f06a48 | 7707 | tb->where = gfc_current_locus; |
7708 | tb->access = tbattr.access; | |
7709 | tb->is_generic = 1; | |
7710 | tb->u.generic = NULL; | |
a36eb9ee | 7711 | |
7712 | switch (op_type) | |
7713 | { | |
7714 | case INTERFACE_GENERIC: | |
7715 | case INTERFACE_USER_OP: | |
7716 | { | |
7717 | const bool is_op = (op_type == INTERFACE_USER_OP); | |
7718 | gfc_symtree* st; | |
7719 | ||
7720 | st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root, | |
7721 | name); | |
7722 | gcc_assert (st); | |
7723 | st->n.tb = tb; | |
7724 | ||
7725 | break; | |
7726 | } | |
7727 | ||
7728 | case INTERFACE_INTRINSIC_OP: | |
7729 | ns->tb_op[op] = tb; | |
7730 | break; | |
7731 | ||
7732 | default: | |
7733 | gcc_unreachable (); | |
7734 | } | |
e2f06a48 | 7735 | } |
7736 | ||
7737 | /* Now, match all following names as specific targets. */ | |
7738 | do | |
7739 | { | |
7740 | gfc_symtree* target_st; | |
7741 | gfc_tbp_generic* target; | |
7742 | ||
7743 | m = gfc_match_name (name); | |
7744 | if (m == MATCH_ERROR) | |
7745 | goto error; | |
7746 | if (m == MATCH_NO) | |
7747 | { | |
7748 | gfc_error ("Expected specific binding name at %C"); | |
7749 | goto error; | |
7750 | } | |
7751 | ||
3323e9b1 | 7752 | target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name); |
e2f06a48 | 7753 | |
7754 | /* See if this is a duplicate specification. */ | |
7755 | for (target = tb->u.generic; target; target = target->next) | |
7756 | if (target_st == target->specific_st) | |
7757 | { | |
7758 | gfc_error ("'%s' already defined as specific binding for the" | |
a36eb9ee | 7759 | " generic '%s' at %C", name, bind_name); |
e2f06a48 | 7760 | goto error; |
7761 | } | |
7762 | ||
e2f06a48 | 7763 | target = gfc_get_tbp_generic (); |
7764 | target->specific_st = target_st; | |
7765 | target->specific = NULL; | |
7766 | target->next = tb->u.generic; | |
7767 | tb->u.generic = target; | |
7768 | } | |
7769 | while (gfc_match (" ,") == MATCH_YES); | |
7770 | ||
7771 | /* Here should be the end. */ | |
7772 | if (gfc_match_eos () != MATCH_YES) | |
7773 | { | |
7774 | gfc_error ("Junk after GENERIC binding at %C"); | |
7775 | goto error; | |
7776 | } | |
7777 | ||
7778 | return MATCH_YES; | |
7779 | ||
7780 | error: | |
7781 | return MATCH_ERROR; | |
7782 | } | |
7783 | ||
7784 | ||
223f0f57 | 7785 | /* Match a FINAL declaration inside a derived type. */ |
7786 | ||
7787 | match | |
7788 | gfc_match_final_decl (void) | |
7789 | { | |
7790 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7791 | gfc_symbol* sym; | |
7792 | match m; | |
7793 | gfc_namespace* module_ns; | |
7794 | bool first, last; | |
7fd88f6e | 7795 | gfc_symbol* block; |
223f0f57 | 7796 | |
7fd88f6e | 7797 | if (gfc_state_stack->state != COMP_DERIVED_CONTAINS) |
223f0f57 | 7798 | { |
7799 | gfc_error ("FINAL declaration at %C must be inside a derived type " | |
7fd88f6e | 7800 | "CONTAINS section"); |
223f0f57 | 7801 | return MATCH_ERROR; |
7802 | } | |
7803 | ||
7fd88f6e | 7804 | block = gfc_state_stack->previous->sym; |
7805 | gcc_assert (block); | |
223f0f57 | 7806 | |
7fd88f6e | 7807 | if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous |
7808 | || gfc_state_stack->previous->previous->state != COMP_MODULE) | |
223f0f57 | 7809 | { |
7810 | gfc_error ("Derived type declaration with FINAL at %C must be in the" | |
7811 | " specification part of a MODULE"); | |
7812 | return MATCH_ERROR; | |
7813 | } | |
7814 | ||
7815 | module_ns = gfc_current_ns; | |
7816 | gcc_assert (module_ns); | |
7817 | gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE); | |
7818 | ||
7819 | /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */ | |
7820 | if (gfc_match (" ::") == MATCH_ERROR) | |
7821 | return MATCH_ERROR; | |
7822 | ||
7823 | /* Match the sequence of procedure names. */ | |
7824 | first = true; | |
7825 | last = false; | |
7826 | do | |
7827 | { | |
7828 | gfc_finalizer* f; | |
7829 | ||
7830 | if (first && gfc_match_eos () == MATCH_YES) | |
7831 | { | |
7832 | gfc_error ("Empty FINAL at %C"); | |
7833 | return MATCH_ERROR; | |
7834 | } | |
7835 | ||
7836 | m = gfc_match_name (name); | |
7837 | if (m == MATCH_NO) | |
7838 | { | |
7839 | gfc_error ("Expected module procedure name at %C"); | |
7840 | return MATCH_ERROR; | |
7841 | } | |
7842 | else if (m != MATCH_YES) | |
7843 | return MATCH_ERROR; | |
7844 | ||
7845 | if (gfc_match_eos () == MATCH_YES) | |
7846 | last = true; | |
7847 | if (!last && gfc_match_char (',') != MATCH_YES) | |
7848 | { | |
7849 | gfc_error ("Expected ',' at %C"); | |
7850 | return MATCH_ERROR; | |
7851 | } | |
7852 | ||
7853 | if (gfc_get_symbol (name, module_ns, &sym)) | |
7854 | { | |
7855 | gfc_error ("Unknown procedure name \"%s\" at %C", name); | |
7856 | return MATCH_ERROR; | |
7857 | } | |
7858 | ||
7859 | /* Mark the symbol as module procedure. */ | |
7860 | if (sym->attr.proc != PROC_MODULE | |
7861 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
7862 | sym->name, NULL) == FAILURE) | |
7863 | return MATCH_ERROR; | |
7864 | ||
7865 | /* Check if we already have this symbol in the list, this is an error. */ | |
7fd88f6e | 7866 | for (f = block->f2k_derived->finalizers; f; f = f->next) |
e449e4dd | 7867 | if (f->proc_sym == sym) |
223f0f57 | 7868 | { |
7869 | gfc_error ("'%s' at %C is already defined as FINAL procedure!", | |
7870 | name); | |
7871 | return MATCH_ERROR; | |
7872 | } | |
7873 | ||
7874 | /* Add this symbol to the list of finalizers. */ | |
7fd88f6e | 7875 | gcc_assert (block->f2k_derived); |
223f0f57 | 7876 | ++sym->refs; |
48d8ad5a | 7877 | f = XCNEW (gfc_finalizer); |
e449e4dd | 7878 | f->proc_sym = sym; |
7879 | f->proc_tree = NULL; | |
223f0f57 | 7880 | f->where = gfc_current_locus; |
7fd88f6e | 7881 | f->next = block->f2k_derived->finalizers; |
7882 | block->f2k_derived->finalizers = f; | |
223f0f57 | 7883 | |
7884 | first = false; | |
7885 | } | |
7886 | while (!last); | |
7887 | ||
7888 | return MATCH_YES; | |
7889 | } | |
36b0a1b0 | 7890 | |
7891 | ||
7892 | const ext_attr_t ext_attr_list[] = { | |
7893 | { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" }, | |
7894 | { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" }, | |
7895 | { "cdecl", EXT_ATTR_CDECL, "cdecl" }, | |
7896 | { "stdcall", EXT_ATTR_STDCALL, "stdcall" }, | |
7897 | { "fastcall", EXT_ATTR_FASTCALL, "fastcall" }, | |
7898 | { NULL, EXT_ATTR_LAST, NULL } | |
7899 | }; | |
7900 | ||
7901 | /* Match a !GCC$ ATTRIBUTES statement of the form: | |
7902 | !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ... | |
7903 | When we come here, we have already matched the !GCC$ ATTRIBUTES string. | |
7904 | ||
7905 | TODO: We should support all GCC attributes using the same syntax for | |
7906 | the attribute list, i.e. the list in C | |
7907 | __attributes(( attribute-list )) | |
7908 | matches then | |
7909 | !GCC$ ATTRIBUTES attribute-list :: | |
7910 | Cf. c-parser.c's c_parser_attributes; the data can then directly be | |
7911 | saved into a TREE. | |
7912 | ||
7913 | As there is absolutely no risk of confusion, we should never return | |
7914 | MATCH_NO. */ | |
7915 | match | |
7916 | gfc_match_gcc_attributes (void) | |
7917 | { | |
7918 | symbol_attribute attr; | |
7919 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7920 | unsigned id; | |
7921 | gfc_symbol *sym; | |
7922 | match m; | |
7923 | ||
7924 | gfc_clear_attr (&attr); | |
7925 | for(;;) | |
7926 | { | |
7927 | char ch; | |
7928 | ||
7929 | if (gfc_match_name (name) != MATCH_YES) | |
7930 | return MATCH_ERROR; | |
7931 | ||
7932 | for (id = 0; id < EXT_ATTR_LAST; id++) | |
7933 | if (strcmp (name, ext_attr_list[id].name) == 0) | |
7934 | break; | |
7935 | ||
7936 | if (id == EXT_ATTR_LAST) | |
7937 | { | |
7938 | gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C"); | |
7939 | return MATCH_ERROR; | |
7940 | } | |
7941 | ||
de0c4488 | 7942 | if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus) |
36b0a1b0 | 7943 | == FAILURE) |
7944 | return MATCH_ERROR; | |
7945 | ||
7946 | gfc_gobble_whitespace (); | |
7947 | ch = gfc_next_ascii_char (); | |
7948 | if (ch == ':') | |
7949 | { | |
7950 | /* This is the successful exit condition for the loop. */ | |
7951 | if (gfc_next_ascii_char () == ':') | |
7952 | break; | |
7953 | } | |
7954 | ||
7955 | if (ch == ',') | |
7956 | continue; | |
7957 | ||
7958 | goto syntax; | |
7959 | } | |
7960 | ||
7961 | if (gfc_match_eos () == MATCH_YES) | |
7962 | goto syntax; | |
7963 | ||
7964 | for(;;) | |
7965 | { | |
7966 | m = gfc_match_name (name); | |
7967 | if (m != MATCH_YES) | |
7968 | return m; | |
7969 | ||
7970 | if (find_special (name, &sym, true)) | |
7971 | return MATCH_ERROR; | |
7972 | ||
7973 | sym->attr.ext_attr |= attr.ext_attr; | |
7974 | ||
7975 | if (gfc_match_eos () == MATCH_YES) | |
7976 | break; | |
7977 | ||
7978 | if (gfc_match_char (',') != MATCH_YES) | |
7979 | goto syntax; | |
7980 | } | |
7981 | ||
7982 | return MATCH_YES; | |
7983 | ||
7984 | syntax: | |
7985 | gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C"); | |
7986 | return MATCH_ERROR; | |
7987 | } |