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4ee9c684 | 1 | /* Declaration statement matcher |
22c1d301 | 2 | Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
1a9745d2 | 3 | Free Software Foundation, Inc. |
4ee9c684 | 4 | Contributed by Andy Vaught |
5 | ||
c84b470d | 6 | This file is part of GCC. |
4ee9c684 | 7 | |
c84b470d | 8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
bdabe786 | 10 | Software Foundation; either version 3, or (at your option) any later |
c84b470d | 11 | version. |
4ee9c684 | 12 | |
c84b470d | 13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
4ee9c684 | 17 | |
18 | You should have received a copy of the GNU General Public License | |
bdabe786 | 19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
4ee9c684 | 21 | |
4ee9c684 | 22 | #include "config.h" |
7436502b | 23 | #include "system.h" |
4ee9c684 | 24 | #include "gfortran.h" |
25 | #include "match.h" | |
26 | #include "parse.h" | |
6f092e31 | 27 | #include "flags.h" |
126387b5 | 28 | #include "constructor.h" |
cbbac028 | 29 | |
30 | /* Macros to access allocate memory for gfc_data_variable, | |
31 | gfc_data_value and gfc_data. */ | |
48d8ad5a | 32 | #define gfc_get_data_variable() XCNEW (gfc_data_variable) |
33 | #define gfc_get_data_value() XCNEW (gfc_data_value) | |
34 | #define gfc_get_data() XCNEW (gfc_data) | |
cbbac028 | 35 | |
36 | ||
36ae04f2 | 37 | /* This flag is set if an old-style length selector is matched |
4ee9c684 | 38 | during a type-declaration statement. */ |
39 | ||
40 | static int old_char_selector; | |
41 | ||
5739e54e | 42 | /* When variables acquire types and attributes from a declaration |
4ee9c684 | 43 | statement, they get them from the following static variables. The |
44 | first part of a declaration sets these variables and the second | |
45 | part copies these into symbol structures. */ | |
46 | ||
47 | static gfc_typespec current_ts; | |
48 | ||
49 | static symbol_attribute current_attr; | |
50 | static gfc_array_spec *current_as; | |
51 | static int colon_seen; | |
52 | ||
c5d33754 | 53 | /* The current binding label (if any). */ |
54 | static char curr_binding_label[GFC_MAX_BINDING_LABEL_LEN + 1]; | |
55 | /* Need to know how many identifiers are on the current data declaration | |
56 | line in case we're given the BIND(C) attribute with a NAME= specifier. */ | |
57 | static int num_idents_on_line; | |
58 | /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we | |
59 | can supply a name if the curr_binding_label is nil and NAME= was not. */ | |
60 | static int has_name_equals = 0; | |
61 | ||
3b6a4b41 | 62 | /* Initializer of the previous enumerator. */ |
63 | ||
64 | static gfc_expr *last_initializer; | |
65 | ||
66 | /* History of all the enumerators is maintained, so that | |
67 | kind values of all the enumerators could be updated depending | |
68 | upon the maximum initialized value. */ | |
69 | ||
70 | typedef struct enumerator_history | |
71 | { | |
72 | gfc_symbol *sym; | |
73 | gfc_expr *initializer; | |
74 | struct enumerator_history *next; | |
75 | } | |
76 | enumerator_history; | |
77 | ||
78 | /* Header of enum history chain. */ | |
79 | ||
80 | static enumerator_history *enum_history = NULL; | |
81 | ||
82 | /* Pointer of enum history node containing largest initializer. */ | |
83 | ||
84 | static enumerator_history *max_enum = NULL; | |
85 | ||
4ee9c684 | 86 | /* gfc_new_block points to the symbol of a newly matched block. */ |
87 | ||
88 | gfc_symbol *gfc_new_block; | |
89 | ||
077932f9 | 90 | bool gfc_matching_function; |
67a51c8e | 91 | |
4ee9c684 | 92 | |
b4f45d02 | 93 | /********************* DATA statement subroutines *********************/ |
94 | ||
1bfea7e8 | 95 | static bool in_match_data = false; |
96 | ||
97 | bool | |
98 | gfc_in_match_data (void) | |
99 | { | |
100 | return in_match_data; | |
101 | } | |
102 | ||
cbbac028 | 103 | static void |
104 | set_in_match_data (bool set_value) | |
1bfea7e8 | 105 | { |
106 | in_match_data = set_value; | |
107 | } | |
108 | ||
b4f45d02 | 109 | /* Free a gfc_data_variable structure and everything beneath it. */ |
110 | ||
111 | static void | |
1a9745d2 | 112 | free_variable (gfc_data_variable *p) |
b4f45d02 | 113 | { |
114 | gfc_data_variable *q; | |
115 | ||
116 | for (; p; p = q) | |
117 | { | |
118 | q = p->next; | |
119 | gfc_free_expr (p->expr); | |
120 | gfc_free_iterator (&p->iter, 0); | |
121 | free_variable (p->list); | |
b4f45d02 | 122 | gfc_free (p); |
123 | } | |
124 | } | |
125 | ||
126 | ||
127 | /* Free a gfc_data_value structure and everything beneath it. */ | |
128 | ||
129 | static void | |
1a9745d2 | 130 | free_value (gfc_data_value *p) |
b4f45d02 | 131 | { |
132 | gfc_data_value *q; | |
133 | ||
134 | for (; p; p = q) | |
135 | { | |
136 | q = p->next; | |
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 | ||
e97ac7c0 | 573 | |
574 | /* Auxilliary function to merge DIMENSION and CODIMENSION array specs. */ | |
575 | ||
576 | static void | |
577 | merge_array_spec (gfc_array_spec *from, gfc_array_spec *to, bool copy) | |
578 | { | |
579 | int i; | |
580 | ||
581 | if (to->rank == 0 && from->rank > 0) | |
582 | { | |
583 | to->rank = from->rank; | |
584 | to->type = from->type; | |
585 | to->cray_pointee = from->cray_pointee; | |
586 | to->cp_was_assumed = from->cp_was_assumed; | |
587 | ||
588 | for (i = 0; i < to->corank; i++) | |
589 | { | |
590 | to->lower[from->rank + i] = to->lower[i]; | |
591 | to->upper[from->rank + i] = to->upper[i]; | |
592 | } | |
593 | for (i = 0; i < from->rank; i++) | |
594 | { | |
595 | if (copy) | |
596 | { | |
597 | to->lower[i] = gfc_copy_expr (from->lower[i]); | |
598 | to->upper[i] = gfc_copy_expr (from->upper[i]); | |
599 | } | |
600 | else | |
601 | { | |
602 | to->lower[i] = from->lower[i]; | |
603 | to->upper[i] = from->upper[i]; | |
604 | } | |
605 | } | |
606 | } | |
607 | else if (to->corank == 0 && from->corank > 0) | |
608 | { | |
609 | to->corank = from->corank; | |
610 | to->cotype = from->cotype; | |
611 | ||
612 | for (i = 0; i < from->corank; i++) | |
613 | { | |
614 | if (copy) | |
615 | { | |
616 | to->lower[to->rank + i] = gfc_copy_expr (from->lower[i]); | |
617 | to->upper[to->rank + i] = gfc_copy_expr (from->upper[i]); | |
618 | } | |
619 | else | |
620 | { | |
621 | to->lower[to->rank + i] = from->lower[i]; | |
622 | to->upper[to->rank + i] = from->upper[i]; | |
623 | } | |
624 | } | |
625 | } | |
626 | } | |
627 | ||
628 | ||
4ee9c684 | 629 | /* Match an intent specification. Since this can only happen after an |
630 | INTENT word, a legal intent-spec must follow. */ | |
631 | ||
632 | static sym_intent | |
633 | match_intent_spec (void) | |
634 | { | |
635 | ||
636 | if (gfc_match (" ( in out )") == MATCH_YES) | |
637 | return INTENT_INOUT; | |
638 | if (gfc_match (" ( in )") == MATCH_YES) | |
639 | return INTENT_IN; | |
640 | if (gfc_match (" ( out )") == MATCH_YES) | |
641 | return INTENT_OUT; | |
642 | ||
643 | gfc_error ("Bad INTENT specification at %C"); | |
644 | return INTENT_UNKNOWN; | |
645 | } | |
646 | ||
647 | ||
648 | /* Matches a character length specification, which is either a | |
649 | specification expression or a '*'. */ | |
650 | ||
651 | static match | |
1a9745d2 | 652 | char_len_param_value (gfc_expr **expr) |
4ee9c684 | 653 | { |
294d58d3 | 654 | match m; |
655 | ||
4ee9c684 | 656 | if (gfc_match_char ('*') == MATCH_YES) |
657 | { | |
658 | *expr = NULL; | |
659 | return MATCH_YES; | |
660 | } | |
661 | ||
294d58d3 | 662 | m = gfc_match_expr (expr); |
40de255b | 663 | |
664 | if (m == MATCH_YES | |
665 | && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE) | |
666 | return MATCH_ERROR; | |
667 | ||
294d58d3 | 668 | if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION) |
669 | { | |
670 | if ((*expr)->value.function.actual | |
671 | && (*expr)->value.function.actual->expr->symtree) | |
672 | { | |
673 | gfc_expr *e; | |
674 | e = (*expr)->value.function.actual->expr; | |
675 | if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE | |
676 | && e->expr_type == EXPR_VARIABLE) | |
677 | { | |
678 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) | |
679 | goto syntax; | |
680 | if (e->symtree->n.sym->ts.type == BT_CHARACTER | |
eeebe20b | 681 | && e->symtree->n.sym->ts.u.cl |
682 | && e->symtree->n.sym->ts.u.cl->length->ts.type == BT_UNKNOWN) | |
294d58d3 | 683 | goto syntax; |
684 | } | |
685 | } | |
686 | } | |
687 | return m; | |
688 | ||
689 | syntax: | |
690 | gfc_error ("Conflict in attributes of function argument at %C"); | |
691 | return MATCH_ERROR; | |
4ee9c684 | 692 | } |
693 | ||
694 | ||
695 | /* A character length is a '*' followed by a literal integer or a | |
696 | char_len_param_value in parenthesis. */ | |
697 | ||
698 | static match | |
1a9745d2 | 699 | match_char_length (gfc_expr **expr) |
4ee9c684 | 700 | { |
3bd3b616 | 701 | int length; |
4ee9c684 | 702 | match m; |
703 | ||
704 | m = gfc_match_char ('*'); | |
705 | if (m != MATCH_YES) | |
706 | return m; | |
707 | ||
3bd3b616 | 708 | m = gfc_match_small_literal_int (&length, NULL); |
4ee9c684 | 709 | if (m == MATCH_ERROR) |
710 | return m; | |
711 | ||
712 | if (m == MATCH_YES) | |
713 | { | |
8e9b41f0 | 714 | if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: " |
715 | "Old-style character length at %C") == FAILURE) | |
716 | return MATCH_ERROR; | |
126387b5 | 717 | *expr = gfc_get_int_expr (gfc_default_integer_kind, NULL, length); |
4ee9c684 | 718 | return m; |
719 | } | |
720 | ||
721 | if (gfc_match_char ('(') == MATCH_NO) | |
722 | goto syntax; | |
723 | ||
724 | m = char_len_param_value (expr); | |
077932f9 | 725 | if (m != MATCH_YES && gfc_matching_function) |
726 | { | |
727 | gfc_undo_symbols (); | |
728 | m = MATCH_YES; | |
729 | } | |
730 | ||
4ee9c684 | 731 | if (m == MATCH_ERROR) |
732 | return m; | |
733 | if (m == MATCH_NO) | |
734 | goto syntax; | |
735 | ||
736 | if (gfc_match_char (')') == MATCH_NO) | |
737 | { | |
738 | gfc_free_expr (*expr); | |
739 | *expr = NULL; | |
740 | goto syntax; | |
741 | } | |
742 | ||
743 | return MATCH_YES; | |
744 | ||
745 | syntax: | |
746 | gfc_error ("Syntax error in character length specification at %C"); | |
747 | return MATCH_ERROR; | |
748 | } | |
749 | ||
750 | ||
ee893be6 | 751 | /* Special subroutine for finding a symbol. Check if the name is found |
752 | in the current name space. If not, and we're compiling a function or | |
753 | subroutine and the parent compilation unit is an interface, then check | |
754 | to see if the name we've been given is the name of the interface | |
755 | (located in another namespace). */ | |
4ee9c684 | 756 | |
757 | static int | |
36b0a1b0 | 758 | find_special (const char *name, gfc_symbol **result, bool allow_subroutine) |
4ee9c684 | 759 | { |
760 | gfc_state_data *s; | |
36b0a1b0 | 761 | gfc_symtree *st; |
ee893be6 | 762 | int i; |
4ee9c684 | 763 | |
36b0a1b0 | 764 | i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine); |
e14bee04 | 765 | if (i == 0) |
36b0a1b0 | 766 | { |
767 | *result = st ? st->n.sym : NULL; | |
768 | goto end; | |
769 | } | |
e14bee04 | 770 | |
4ee9c684 | 771 | if (gfc_current_state () != COMP_SUBROUTINE |
772 | && gfc_current_state () != COMP_FUNCTION) | |
ee893be6 | 773 | goto end; |
4ee9c684 | 774 | |
775 | s = gfc_state_stack->previous; | |
776 | if (s == NULL) | |
ee893be6 | 777 | goto end; |
4ee9c684 | 778 | |
779 | if (s->state != COMP_INTERFACE) | |
ee893be6 | 780 | goto end; |
4ee9c684 | 781 | if (s->sym == NULL) |
f6d0e37a | 782 | goto end; /* Nameless interface. */ |
4ee9c684 | 783 | |
784 | if (strcmp (name, s->sym->name) == 0) | |
785 | { | |
786 | *result = s->sym; | |
787 | return 0; | |
788 | } | |
789 | ||
ee893be6 | 790 | end: |
791 | return i; | |
4ee9c684 | 792 | } |
793 | ||
794 | ||
795 | /* Special subroutine for getting a symbol node associated with a | |
796 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
797 | symbol is created in the parent using with symtree node in the | |
798 | child unit pointing to the symbol. If the current namespace has no | |
799 | parent, then the symbol is just created in the current unit. */ | |
800 | ||
801 | static int | |
1a9745d2 | 802 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
4ee9c684 | 803 | { |
804 | gfc_symtree *st; | |
805 | gfc_symbol *sym; | |
2ddb8ed9 | 806 | int rc = 0; |
4ee9c684 | 807 | |
d77f260f | 808 | /* Module functions have to be left in their own namespace because |
809 | they have potentially (almost certainly!) already been referenced. | |
810 | In this sense, they are rather like external functions. This is | |
811 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
812 | space is set to point to the master function, so that the fake | |
813 | result mechanism can work. */ | |
814 | if (module_fcn_entry) | |
861d824f | 815 | { |
816 | /* Present if entry is declared to be a module procedure. */ | |
817 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); | |
c6a05992 | 818 | |
861d824f | 819 | if (*result == NULL) |
820 | rc = gfc_get_symbol (name, NULL, result); | |
a78f714d | 821 | else if (!gfc_get_symbol (name, NULL, &sym) && sym |
c6a05992 | 822 | && (*result)->ts.type == BT_UNKNOWN |
823 | && sym->attr.flavor == FL_UNKNOWN) | |
824 | /* Pick up the typespec for the entry, if declared in the function | |
825 | body. Note that this symbol is FL_UNKNOWN because it will | |
826 | only have appeared in a type declaration. The local symtree | |
827 | is set to point to the module symbol and a unique symtree | |
828 | to the local version. This latter ensures a correct clearing | |
829 | of the symbols. */ | |
a78f714d | 830 | { |
831 | /* If the ENTRY proceeds its specification, we need to ensure | |
832 | that this does not raise a "has no IMPLICIT type" error. */ | |
833 | if (sym->ts.type == BT_UNKNOWN) | |
2168078b | 834 | sym->attr.untyped = 1; |
a78f714d | 835 | |
2168078b | 836 | (*result)->ts = sym->ts; |
a78f714d | 837 | |
838 | /* Put the symbol in the procedure namespace so that, should | |
69b1505f | 839 | the ENTRY precede its specification, the specification |
a78f714d | 840 | can be applied. */ |
841 | (*result)->ns = gfc_current_ns; | |
842 | ||
843 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); | |
844 | st->n.sym = *result; | |
845 | st = gfc_get_unique_symtree (gfc_current_ns); | |
846 | st->n.sym = sym; | |
847 | } | |
861d824f | 848 | } |
858f9894 | 849 | else |
850 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
4ee9c684 | 851 | |
2ddb8ed9 | 852 | if (rc) |
853 | return rc; | |
854 | ||
858f9894 | 855 | sym = *result; |
c717e399 | 856 | gfc_current_ns->refs++; |
4ee9c684 | 857 | |
c1977dbe | 858 | if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE) |
858f9894 | 859 | { |
16f49153 | 860 | /* Trap another encompassed procedure with the same name. All |
861 | these conditions are necessary to avoid picking up an entry | |
862 | whose name clashes with that of the encompassing procedure; | |
863 | this is handled using gsymbols to register unique,globally | |
864 | accessible names. */ | |
858f9894 | 865 | if (sym->attr.flavor != 0 |
1a9745d2 | 866 | && sym->attr.proc != 0 |
867 | && (sym->attr.subroutine || sym->attr.function) | |
868 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
858f9894 | 869 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
870 | name, &sym->declared_at); | |
871 | ||
5720fd2f | 872 | /* Trap a procedure with a name the same as interface in the |
873 | encompassing scope. */ | |
874 | if (sym->attr.generic != 0 | |
db697236 | 875 | && (sym->attr.subroutine || sym->attr.function) |
876 | && !sym->attr.mod_proc) | |
5720fd2f | 877 | gfc_error_now ("Name '%s' at %C is already defined" |
878 | " as a generic interface at %L", | |
879 | name, &sym->declared_at); | |
880 | ||
858f9894 | 881 | /* Trap declarations of attributes in encompassing scope. The |
882 | signature for this is that ts.kind is set. Legitimate | |
883 | references only set ts.type. */ | |
884 | if (sym->ts.kind != 0 | |
1a9745d2 | 885 | && !sym->attr.implicit_type |
886 | && sym->attr.proc == 0 | |
887 | && gfc_current_ns->parent != NULL | |
888 | && sym->attr.access == 0 | |
889 | && !module_fcn_entry) | |
890 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
891 | "and must not have attributes declared at %L", | |
858f9894 | 892 | name, &sym->declared_at); |
893 | } | |
894 | ||
895 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
896 | return rc; | |
4ee9c684 | 897 | |
d77f260f | 898 | /* Module function entries will already have a symtree in |
899 | the current namespace but will need one at module level. */ | |
900 | if (module_fcn_entry) | |
861d824f | 901 | { |
902 | /* Present if entry is declared to be a module procedure. */ | |
903 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); | |
904 | if (st == NULL) | |
905 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
906 | } | |
d77f260f | 907 | else |
908 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
4ee9c684 | 909 | |
4ee9c684 | 910 | st->n.sym = sym; |
911 | sym->refs++; | |
912 | ||
f6d0e37a | 913 | /* See if the procedure should be a module procedure. */ |
4ee9c684 | 914 | |
d77f260f | 915 | if (((sym->ns->proc_name != NULL |
861d824f | 916 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
917 | && sym->attr.proc != PROC_MODULE) | |
918 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) | |
919 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
920 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 921 | rc = 2; |
922 | ||
923 | return rc; | |
924 | } | |
925 | ||
926 | ||
c5d33754 | 927 | /* Verify that the given symbol representing a parameter is C |
928 | interoperable, by checking to see if it was marked as such after | |
929 | its declaration. If the given symbol is not interoperable, a | |
930 | warning is reported, thus removing the need to return the status to | |
931 | the calling function. The standard does not require the user use | |
932 | one of the iso_c_binding named constants to declare an | |
933 | interoperable parameter, but we can't be sure if the param is C | |
934 | interop or not if the user doesn't. For example, integer(4) may be | |
935 | legal Fortran, but doesn't have meaning in C. It may interop with | |
936 | a number of the C types, which causes a problem because the | |
937 | compiler can't know which one. This code is almost certainly not | |
938 | portable, and the user will get what they deserve if the C type | |
939 | across platforms isn't always interoperable with integer(4). If | |
940 | the user had used something like integer(c_int) or integer(c_long), | |
941 | the compiler could have automatically handled the varying sizes | |
942 | across platforms. */ | |
943 | ||
f6bb8f4b | 944 | gfc_try |
c5d33754 | 945 | verify_c_interop_param (gfc_symbol *sym) |
946 | { | |
947 | int is_c_interop = 0; | |
f6bb8f4b | 948 | gfc_try retval = SUCCESS; |
c5d33754 | 949 | |
950 | /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). | |
951 | Don't repeat the checks here. */ | |
952 | if (sym->attr.implicit_type) | |
953 | return SUCCESS; | |
954 | ||
955 | /* For subroutines or functions that are passed to a BIND(C) procedure, | |
956 | they're interoperable if they're BIND(C) and their params are all | |
957 | interoperable. */ | |
958 | if (sym->attr.flavor == FL_PROCEDURE) | |
959 | { | |
960 | if (sym->attr.is_bind_c == 0) | |
961 | { | |
962 | gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " | |
963 | "attribute to be C interoperable", sym->name, | |
964 | &(sym->declared_at)); | |
965 | ||
966 | return FAILURE; | |
967 | } | |
968 | else | |
969 | { | |
970 | if (sym->attr.is_c_interop == 1) | |
971 | /* We've already checked this procedure; don't check it again. */ | |
972 | return SUCCESS; | |
973 | else | |
974 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, | |
975 | sym->common_block); | |
976 | } | |
977 | } | |
978 | ||
979 | /* See if we've stored a reference to a procedure that owns sym. */ | |
980 | if (sym->ns != NULL && sym->ns->proc_name != NULL) | |
981 | { | |
982 | if (sym->ns->proc_name->attr.is_bind_c == 1) | |
983 | { | |
984 | is_c_interop = | |
209d3778 | 985 | (verify_c_interop (&(sym->ts)) |
c5d33754 | 986 | == SUCCESS ? 1 : 0); |
987 | ||
988 | if (is_c_interop != 1) | |
989 | { | |
990 | /* Make personalized messages to give better feedback. */ | |
991 | if (sym->ts.type == BT_DERIVED) | |
992 | gfc_error ("Type '%s' at %L is a parameter to the BIND(C) " | |
993 | " procedure '%s' but is not C interoperable " | |
994 | "because derived type '%s' is not C interoperable", | |
995 | sym->name, &(sym->declared_at), | |
996 | sym->ns->proc_name->name, | |
eeebe20b | 997 | sym->ts.u.derived->name); |
c5d33754 | 998 | else |
999 | gfc_warning ("Variable '%s' at %L is a parameter to the " | |
1000 | "BIND(C) procedure '%s' but may not be C " | |
1001 | "interoperable", | |
1002 | sym->name, &(sym->declared_at), | |
1003 | sym->ns->proc_name->name); | |
1004 | } | |
e4eda3ec | 1005 | |
1006 | /* Character strings are only C interoperable if they have a | |
1007 | length of 1. */ | |
1008 | if (sym->ts.type == BT_CHARACTER) | |
1009 | { | |
eeebe20b | 1010 | gfc_charlen *cl = sym->ts.u.cl; |
e4eda3ec | 1011 | if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT |
1012 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) | |
1013 | { | |
1014 | gfc_error ("Character argument '%s' at %L " | |
1015 | "must be length 1 because " | |
1016 | "procedure '%s' is BIND(C)", | |
1017 | sym->name, &sym->declared_at, | |
1018 | sym->ns->proc_name->name); | |
1019 | retval = FAILURE; | |
1020 | } | |
1021 | } | |
1022 | ||
c5d33754 | 1023 | /* We have to make sure that any param to a bind(c) routine does |
1024 | not have the allocatable, pointer, or optional attributes, | |
1025 | according to J3/04-007, section 5.1. */ | |
1026 | if (sym->attr.allocatable == 1) | |
1027 | { | |
1028 | gfc_error ("Variable '%s' at %L cannot have the " | |
1029 | "ALLOCATABLE attribute because procedure '%s'" | |
1030 | " is BIND(C)", sym->name, &(sym->declared_at), | |
1031 | sym->ns->proc_name->name); | |
1032 | retval = FAILURE; | |
1033 | } | |
1034 | ||
1035 | if (sym->attr.pointer == 1) | |
1036 | { | |
1037 | gfc_error ("Variable '%s' at %L cannot have the " | |
1038 | "POINTER attribute because procedure '%s'" | |
1039 | " is BIND(C)", sym->name, &(sym->declared_at), | |
1040 | sym->ns->proc_name->name); | |
1041 | retval = FAILURE; | |
1042 | } | |
1043 | ||
1044 | if (sym->attr.optional == 1) | |
1045 | { | |
1046 | gfc_error ("Variable '%s' at %L cannot have the " | |
1047 | "OPTIONAL attribute because procedure '%s'" | |
1048 | " is BIND(C)", sym->name, &(sym->declared_at), | |
1049 | sym->ns->proc_name->name); | |
1050 | retval = FAILURE; | |
1051 | } | |
1052 | ||
1053 | /* Make sure that if it has the dimension attribute, that it is | |
1054 | either assumed size or explicit shape. */ | |
1055 | if (sym->as != NULL) | |
1056 | { | |
1057 | if (sym->as->type == AS_ASSUMED_SHAPE) | |
1058 | { | |
1059 | gfc_error ("Assumed-shape array '%s' at %L cannot be an " | |
1060 | "argument to the procedure '%s' at %L because " | |
1061 | "the procedure is BIND(C)", sym->name, | |
1062 | &(sym->declared_at), sym->ns->proc_name->name, | |
1063 | &(sym->ns->proc_name->declared_at)); | |
1064 | retval = FAILURE; | |
1065 | } | |
1066 | ||
1067 | if (sym->as->type == AS_DEFERRED) | |
1068 | { | |
1069 | gfc_error ("Deferred-shape array '%s' at %L cannot be an " | |
1070 | "argument to the procedure '%s' at %L because " | |
1071 | "the procedure is BIND(C)", sym->name, | |
1072 | &(sym->declared_at), sym->ns->proc_name->name, | |
1073 | &(sym->ns->proc_name->declared_at)); | |
1074 | retval = FAILURE; | |
1075 | } | |
1076 | } | |
1077 | } | |
1078 | } | |
1079 | ||
1080 | return retval; | |
1081 | } | |
1082 | ||
1083 | ||
1de1b1a9 | 1084 | |
c5d33754 | 1085 | /* Function called by variable_decl() that adds a name to the symbol table. */ |
4ee9c684 | 1086 | |
f6bb8f4b | 1087 | static gfc_try |
1a9745d2 | 1088 | build_sym (const char *name, gfc_charlen *cl, |
1089 | gfc_array_spec **as, locus *var_locus) | |
4ee9c684 | 1090 | { |
1091 | symbol_attribute attr; | |
1092 | gfc_symbol *sym; | |
1093 | ||
ee893be6 | 1094 | if (gfc_get_symbol (name, NULL, &sym)) |
4ee9c684 | 1095 | return FAILURE; |
1096 | ||
f6d0e37a | 1097 | /* Start updating the symbol table. Add basic type attribute if present. */ |
4ee9c684 | 1098 | if (current_ts.type != BT_UNKNOWN |
1a9745d2 | 1099 | && (sym->attr.implicit_type == 0 |
1100 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
4ee9c684 | 1101 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
1102 | return FAILURE; | |
1103 | ||
1104 | if (sym->ts.type == BT_CHARACTER) | |
eeebe20b | 1105 | sym->ts.u.cl = cl; |
4ee9c684 | 1106 | |
1107 | /* Add dimension attribute if present. */ | |
1108 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
1109 | return FAILURE; | |
1110 | *as = NULL; | |
1111 | ||
1112 | /* Add attribute to symbol. The copy is so that we can reset the | |
1113 | dimension attribute. */ | |
1114 | attr = current_attr; | |
1115 | attr.dimension = 0; | |
aff518b0 | 1116 | attr.codimension = 0; |
4ee9c684 | 1117 | |
1118 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
1119 | return FAILURE; | |
1120 | ||
c5d33754 | 1121 | /* Finish any work that may need to be done for the binding label, |
1122 | if it's a bind(c). The bind(c) attr is found before the symbol | |
1123 | is made, and before the symbol name (for data decls), so the | |
1124 | current_ts is holding the binding label, or nothing if the | |
1125 | name= attr wasn't given. Therefore, test here if we're dealing | |
1126 | with a bind(c) and make sure the binding label is set correctly. */ | |
1127 | if (sym->attr.is_bind_c == 1) | |
1128 | { | |
1129 | if (sym->binding_label[0] == '\0') | |
1130 | { | |
825718f9 | 1131 | /* Set the binding label and verify that if a NAME= was specified |
1132 | then only one identifier was in the entity-decl-list. */ | |
1133 | if (set_binding_label (sym->binding_label, sym->name, | |
1134 | num_idents_on_line) == FAILURE) | |
c5d33754 | 1135 | return FAILURE; |
1136 | } | |
1137 | } | |
1138 | ||
1139 | /* See if we know we're in a common block, and if it's a bind(c) | |
1140 | common then we need to make sure we're an interoperable type. */ | |
1141 | if (sym->attr.in_common == 1) | |
1142 | { | |
1143 | /* Test the common block object. */ | |
1144 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 | |
1145 | && sym->ts.is_c_interop != 1) | |
1146 | { | |
1147 | gfc_error_now ("Variable '%s' in common block '%s' at %C " | |
1148 | "must be declared with a C interoperable " | |
1149 | "kind since common block '%s' is BIND(C)", | |
1150 | sym->name, sym->common_block->name, | |
1151 | sym->common_block->name); | |
1152 | gfc_clear_error (); | |
1153 | } | |
1154 | } | |
1155 | ||
2457a77e | 1156 | sym->attr.implied_index = 0; |
1157 | ||
1de1b1a9 | 1158 | if (sym->ts.type == BT_CLASS) |
b3704193 | 1159 | { |
1160 | sym->attr.class_ok = (sym->attr.dummy | |
1161 | || sym->attr.pointer | |
1162 | || sym->attr.allocatable) ? 1 : 0; | |
09c509ed | 1163 | gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as, false); |
b3704193 | 1164 | } |
1de1b1a9 | 1165 | |
4ee9c684 | 1166 | return SUCCESS; |
1167 | } | |
1168 | ||
1a9745d2 | 1169 | |
a270dc8e | 1170 | /* Set character constant to the given length. The constant will be padded or |
d1a39099 | 1171 | truncated. If we're inside an array constructor without a typespec, we |
1172 | additionally check that all elements have the same length; check_len -1 | |
1173 | means no checking. */ | |
a270dc8e | 1174 | |
1175 | void | |
d1a39099 | 1176 | gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len) |
a270dc8e | 1177 | { |
c32f863c | 1178 | gfc_char_t *s; |
a270dc8e | 1179 | int slen; |
1180 | ||
1181 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
b44437b9 | 1182 | gcc_assert (expr->ts.type == BT_CHARACTER); |
a270dc8e | 1183 | |
1184 | slen = expr->value.character.length; | |
1185 | if (len != slen) | |
1186 | { | |
c32f863c | 1187 | s = gfc_get_wide_string (len + 1); |
1188 | memcpy (s, expr->value.character.string, | |
1189 | MIN (len, slen) * sizeof (gfc_char_t)); | |
a270dc8e | 1190 | if (len > slen) |
c32f863c | 1191 | gfc_wide_memset (&s[slen], ' ', len - slen); |
1bfea7e8 | 1192 | |
1193 | if (gfc_option.warn_character_truncation && slen > len) | |
1194 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
1195 | "(%d/%d)", &expr->where, slen, len); | |
1196 | ||
1197 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
1198 | initializers. */ | |
d1a39099 | 1199 | if (check_len != -1 && slen != check_len |
1200 | && !(gfc_option.allow_std & GFC_STD_GNU)) | |
1bfea7e8 | 1201 | gfc_error_now ("The CHARACTER elements of the array constructor " |
1202 | "at %L must have the same length (%d/%d)", | |
d1a39099 | 1203 | &expr->where, slen, check_len); |
1bfea7e8 | 1204 | |
89f528df | 1205 | s[len] = '\0'; |
a270dc8e | 1206 | gfc_free (expr->value.character.string); |
1207 | expr->value.character.string = s; | |
1208 | expr->value.character.length = len; | |
1209 | } | |
1210 | } | |
4ee9c684 | 1211 | |
3b6a4b41 | 1212 | |
e14bee04 | 1213 | /* Function to create and update the enumerator history |
3b6a4b41 | 1214 | using the information passed as arguments. |
e14bee04 | 1215 | Pointer "max_enum" is also updated, to point to |
1216 | enum history node containing largest initializer. | |
3b6a4b41 | 1217 | |
1218 | SYM points to the symbol node of enumerator. | |
f6d0e37a | 1219 | INIT points to its enumerator value. */ |
3b6a4b41 | 1220 | |
e14bee04 | 1221 | static void |
1a9745d2 | 1222 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
3b6a4b41 | 1223 | { |
1224 | enumerator_history *new_enum_history; | |
1225 | gcc_assert (sym != NULL && init != NULL); | |
1226 | ||
48d8ad5a | 1227 | new_enum_history = XCNEW (enumerator_history); |
3b6a4b41 | 1228 | |
1229 | new_enum_history->sym = sym; | |
1230 | new_enum_history->initializer = init; | |
1231 | new_enum_history->next = NULL; | |
1232 | ||
1233 | if (enum_history == NULL) | |
1234 | { | |
1235 | enum_history = new_enum_history; | |
1236 | max_enum = enum_history; | |
1237 | } | |
1238 | else | |
1239 | { | |
1240 | new_enum_history->next = enum_history; | |
1241 | enum_history = new_enum_history; | |
1242 | ||
e14bee04 | 1243 | if (mpz_cmp (max_enum->initializer->value.integer, |
3b6a4b41 | 1244 | new_enum_history->initializer->value.integer) < 0) |
1a9745d2 | 1245 | max_enum = new_enum_history; |
3b6a4b41 | 1246 | } |
1247 | } | |
1248 | ||
1249 | ||
e14bee04 | 1250 | /* Function to free enum kind history. */ |
3b6a4b41 | 1251 | |
e14bee04 | 1252 | void |
1a9745d2 | 1253 | gfc_free_enum_history (void) |
3b6a4b41 | 1254 | { |
e14bee04 | 1255 | enumerator_history *current = enum_history; |
1256 | enumerator_history *next; | |
3b6a4b41 | 1257 | |
1258 | while (current != NULL) | |
1259 | { | |
1260 | next = current->next; | |
1261 | gfc_free (current); | |
1262 | current = next; | |
1263 | } | |
1264 | max_enum = NULL; | |
1265 | enum_history = NULL; | |
1266 | } | |
1267 | ||
1268 | ||
4ee9c684 | 1269 | /* Function called by variable_decl() that adds an initialization |
1270 | expression to a symbol. */ | |
1271 | ||
f6bb8f4b | 1272 | static gfc_try |
f6d0e37a | 1273 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) |
4ee9c684 | 1274 | { |
1275 | symbol_attribute attr; | |
1276 | gfc_symbol *sym; | |
1277 | gfc_expr *init; | |
1278 | ||
1279 | init = *initp; | |
36b0a1b0 | 1280 | if (find_special (name, &sym, false)) |
4ee9c684 | 1281 | return FAILURE; |
1282 | ||
1283 | attr = sym->attr; | |
1284 | ||
1285 | /* If this symbol is confirming an implicit parameter type, | |
1286 | then an initialization expression is not allowed. */ | |
1287 | if (attr.flavor == FL_PARAMETER | |
1288 | && sym->value != NULL | |
1289 | && *initp != NULL) | |
1290 | { | |
1291 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
1292 | sym->name); | |
1293 | return FAILURE; | |
1294 | } | |
1295 | ||
1296 | if (init == NULL) | |
1297 | { | |
1298 | /* An initializer is required for PARAMETER declarations. */ | |
1299 | if (attr.flavor == FL_PARAMETER) | |
1300 | { | |
1301 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
1302 | return FAILURE; | |
1303 | } | |
1304 | } | |
1305 | else | |
1306 | { | |
1307 | /* If a variable appears in a DATA block, it cannot have an | |
b97f1a18 | 1308 | initializer. */ |
4ee9c684 | 1309 | if (sym->attr.data) |
1310 | { | |
1a9745d2 | 1311 | gfc_error ("Variable '%s' at %C with an initializer already " |
1312 | "appears in a DATA statement", sym->name); | |
4ee9c684 | 1313 | return FAILURE; |
1314 | } | |
1315 | ||
cca3db55 | 1316 | /* Check if the assignment can happen. This has to be put off |
1317 | until later for a derived type variable. */ | |
4ee9c684 | 1318 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
1de1b1a9 | 1319 | && sym->ts.type != BT_CLASS && init->ts.type != BT_CLASS |
4ee9c684 | 1320 | && gfc_check_assign_symbol (sym, init) == FAILURE) |
1321 | return FAILURE; | |
1322 | ||
eeebe20b | 1323 | if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl |
da540712 | 1324 | && init->ts.type == BT_CHARACTER) |
a270dc8e | 1325 | { |
1326 | /* Update symbol character length according initializer. */ | |
da540712 | 1327 | if (gfc_check_assign_symbol (sym, init) == FAILURE) |
1328 | return FAILURE; | |
1329 | ||
eeebe20b | 1330 | if (sym->ts.u.cl->length == NULL) |
a270dc8e | 1331 | { |
03c2a028 | 1332 | int clen; |
f6d0e37a | 1333 | /* If there are multiple CHARACTER variables declared on the |
1334 | same line, we don't want them to share the same length. */ | |
d270ce52 | 1335 | sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
e9c873a4 | 1336 | |
03c2a028 | 1337 | if (sym->attr.flavor == FL_PARAMETER) |
1338 | { | |
1339 | if (init->expr_type == EXPR_CONSTANT) | |
1340 | { | |
1341 | clen = init->value.character.length; | |
126387b5 | 1342 | sym->ts.u.cl->length |
1343 | = gfc_get_int_expr (gfc_default_integer_kind, | |
1344 | NULL, clen); | |
03c2a028 | 1345 | } |
1346 | else if (init->expr_type == EXPR_ARRAY) | |
1347 | { | |
126387b5 | 1348 | gfc_constructor *c; |
1349 | c = gfc_constructor_first (init->value.constructor); | |
1350 | clen = c->expr->value.character.length; | |
1351 | sym->ts.u.cl->length | |
1352 | = gfc_get_int_expr (gfc_default_integer_kind, | |
1353 | NULL, clen); | |
03c2a028 | 1354 | } |
eeebe20b | 1355 | else if (init->ts.u.cl && init->ts.u.cl->length) |
1356 | sym->ts.u.cl->length = | |
1357 | gfc_copy_expr (sym->value->ts.u.cl->length); | |
03c2a028 | 1358 | } |
a270dc8e | 1359 | } |
1360 | /* Update initializer character length according symbol. */ | |
eeebe20b | 1361 | else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT) |
a270dc8e | 1362 | { |
eeebe20b | 1363 | int len = mpz_get_si (sym->ts.u.cl->length->value.integer); |
a270dc8e | 1364 | |
1365 | if (init->expr_type == EXPR_CONSTANT) | |
d1a39099 | 1366 | gfc_set_constant_character_len (len, init, -1); |
a270dc8e | 1367 | else if (init->expr_type == EXPR_ARRAY) |
1368 | { | |
126387b5 | 1369 | gfc_constructor *c; |
1370 | ||
39908fd9 | 1371 | /* Build a new charlen to prevent simplification from |
1372 | deleting the length before it is resolved. */ | |
d270ce52 | 1373 | init->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
eeebe20b | 1374 | init->ts.u.cl->length = gfc_copy_expr (sym->ts.u.cl->length); |
39908fd9 | 1375 | |
126387b5 | 1376 | for (c = gfc_constructor_first (init->value.constructor); |
1377 | c; c = gfc_constructor_next (c)) | |
1378 | gfc_set_constant_character_len (len, c->expr, -1); | |
a270dc8e | 1379 | } |
1380 | } | |
1381 | } | |
1382 | ||
c5d33754 | 1383 | /* Need to check if the expression we initialized this |
1384 | to was one of the iso_c_binding named constants. If so, | |
1385 | and we're a parameter (constant), let it be iso_c. | |
1386 | For example: | |
1387 | integer(c_int), parameter :: my_int = c_int | |
1388 | integer(my_int) :: my_int_2 | |
1389 | If we mark my_int as iso_c (since we can see it's value | |
1390 | is equal to one of the named constants), then my_int_2 | |
1391 | will be considered C interoperable. */ | |
1392 | if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) | |
1393 | { | |
1394 | sym->ts.is_iso_c |= init->ts.is_iso_c; | |
1395 | sym->ts.is_c_interop |= init->ts.is_c_interop; | |
1396 | /* attr bits needed for module files. */ | |
1397 | sym->attr.is_iso_c |= init->ts.is_iso_c; | |
1398 | sym->attr.is_c_interop |= init->ts.is_c_interop; | |
1399 | if (init->ts.is_iso_c) | |
1400 | sym->ts.f90_type = init->ts.f90_type; | |
1401 | } | |
126387b5 | 1402 | |
4ee9c684 | 1403 | /* Add initializer. Make sure we keep the ranks sane. */ |
1404 | if (sym->attr.dimension && init->rank == 0) | |
7baa3fb4 | 1405 | { |
1406 | mpz_t size; | |
1407 | gfc_expr *array; | |
7baa3fb4 | 1408 | int n; |
1409 | if (sym->attr.flavor == FL_PARAMETER | |
1410 | && init->expr_type == EXPR_CONSTANT | |
1411 | && spec_size (sym->as, &size) == SUCCESS | |
1412 | && mpz_cmp_si (size, 0) > 0) | |
1413 | { | |
126387b5 | 1414 | array = gfc_get_array_expr (init->ts.type, init->ts.kind, |
1415 | &init->where); | |
7baa3fb4 | 1416 | for (n = 0; n < (int)mpz_get_si (size); n++) |
126387b5 | 1417 | gfc_constructor_append_expr (&array->value.constructor, |
1418 | n == 0 | |
1419 | ? init | |
1420 | : gfc_copy_expr (init), | |
1421 | &init->where); | |
1422 | ||
7baa3fb4 | 1423 | array->shape = gfc_get_shape (sym->as->rank); |
1424 | for (n = 0; n < sym->as->rank; n++) | |
1425 | spec_dimen_size (sym->as, n, &array->shape[n]); | |
1426 | ||
1427 | init = array; | |
1428 | mpz_clear (size); | |
1429 | } | |
1430 | init->rank = sym->as->rank; | |
1431 | } | |
4ee9c684 | 1432 | |
1433 | sym->value = init; | |
3cd3c667 | 1434 | if (sym->attr.save == SAVE_NONE) |
1435 | sym->attr.save = SAVE_IMPLICIT; | |
4ee9c684 | 1436 | *initp = NULL; |
1437 | } | |
1438 | ||
1439 | return SUCCESS; | |
1440 | } | |
1441 | ||
1442 | ||
1443 | /* Function called by variable_decl() that adds a name to a structure | |
1444 | being built. */ | |
1445 | ||
f6bb8f4b | 1446 | static gfc_try |
1a9745d2 | 1447 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
1448 | gfc_array_spec **as) | |
4ee9c684 | 1449 | { |
1450 | gfc_component *c; | |
b3704193 | 1451 | gfc_try t = SUCCESS; |
4ee9c684 | 1452 | |
53d2e124 | 1453 | /* F03:C438/C439. If the current symbol is of the same derived type that we're |
4ee9c684 | 1454 | constructing, it must have the pointer attribute. */ |
53d2e124 | 1455 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
eeebe20b | 1456 | && current_ts.u.derived == gfc_current_block () |
4ee9c684 | 1457 | && current_attr.pointer == 0) |
1458 | { | |
1459 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1460 | return FAILURE; | |
1461 | } | |
1462 | ||
1a9745d2 | 1463 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
4ee9c684 | 1464 | { |
1465 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1466 | { | |
1467 | gfc_error ("Array component of structure at %C must have explicit " | |
1468 | "or deferred shape"); | |
1469 | return FAILURE; | |
1470 | } | |
1471 | } | |
1472 | ||
1473 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1474 | return FAILURE; | |
1475 | ||
1476 | c->ts = current_ts; | |
eeebe20b | 1477 | if (c->ts.type == BT_CHARACTER) |
1478 | c->ts.u.cl = cl; | |
3be2b8d5 | 1479 | c->attr = current_attr; |
4ee9c684 | 1480 | |
1481 | c->initializer = *init; | |
1482 | *init = NULL; | |
1483 | ||
1484 | c->as = *as; | |
1485 | if (c->as != NULL) | |
aff518b0 | 1486 | { |
1487 | if (c->as->corank) | |
1488 | c->attr.codimension = 1; | |
1489 | if (c->as->rank) | |
1490 | c->attr.dimension = 1; | |
1491 | } | |
4ee9c684 | 1492 | *as = NULL; |
1493 | ||
a2f51d5f | 1494 | /* Should this ever get more complicated, combine with similar section |
1495 | in add_init_expr_to_sym into a separate function. */ | |
eeebe20b | 1496 | if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.u.cl |
1497 | && c->ts.u.cl->length && c->ts.u.cl->length->expr_type == EXPR_CONSTANT) | |
a2f51d5f | 1498 | { |
d1a39099 | 1499 | int len; |
1500 | ||
eeebe20b | 1501 | gcc_assert (c->ts.u.cl && c->ts.u.cl->length); |
1502 | gcc_assert (c->ts.u.cl->length->expr_type == EXPR_CONSTANT); | |
1503 | gcc_assert (c->ts.u.cl->length->ts.type == BT_INTEGER); | |
d1a39099 | 1504 | |
eeebe20b | 1505 | len = mpz_get_si (c->ts.u.cl->length->value.integer); |
a2f51d5f | 1506 | |
1507 | if (c->initializer->expr_type == EXPR_CONSTANT) | |
d1a39099 | 1508 | gfc_set_constant_character_len (len, c->initializer, -1); |
eeebe20b | 1509 | else if (mpz_cmp (c->ts.u.cl->length->value.integer, |
1510 | c->initializer->ts.u.cl->length->value.integer)) | |
a2f51d5f | 1511 | { |
126387b5 | 1512 | gfc_constructor *ctor; |
1513 | ctor = gfc_constructor_first (c->initializer->value.constructor); | |
d1a39099 | 1514 | |
6e4faf80 | 1515 | if (ctor) |
d1a39099 | 1516 | { |
6e4faf80 | 1517 | int first_len; |
126387b5 | 1518 | bool has_ts = (c->initializer->ts.u.cl |
1519 | && c->initializer->ts.u.cl->length_from_typespec); | |
6e4faf80 | 1520 | |
1521 | /* Remember the length of the first element for checking | |
1522 | that all elements *in the constructor* have the same | |
1523 | length. This need not be the length of the LHS! */ | |
1524 | gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT); | |
1525 | gcc_assert (ctor->expr->ts.type == BT_CHARACTER); | |
1526 | first_len = ctor->expr->value.character.length; | |
1527 | ||
126387b5 | 1528 | for ( ; ctor; ctor = gfc_constructor_next (ctor)) |
1529 | if (ctor->expr->expr_type == EXPR_CONSTANT) | |
d1a39099 | 1530 | { |
126387b5 | 1531 | gfc_set_constant_character_len (len, ctor->expr, |
1532 | has_ts ? -1 : first_len); | |
1533 | ctor->expr->ts.u.cl->length = gfc_copy_expr (c->ts.u.cl->length); | |
d1a39099 | 1534 | } |
d1a39099 | 1535 | } |
a2f51d5f | 1536 | } |
1537 | } | |
1538 | ||
4ee9c684 | 1539 | /* Check array components. */ |
3be2b8d5 | 1540 | if (!c->attr.dimension) |
b3704193 | 1541 | goto scalar; |
4ee9c684 | 1542 | |
3be2b8d5 | 1543 | if (c->attr.pointer) |
4ee9c684 | 1544 | { |
1545 | if (c->as->type != AS_DEFERRED) | |
1546 | { | |
2294b616 | 1547 | gfc_error ("Pointer array component of structure at %C must have a " |
1548 | "deferred shape"); | |
b3704193 | 1549 | t = FAILURE; |
2294b616 | 1550 | } |
1551 | } | |
3be2b8d5 | 1552 | else if (c->attr.allocatable) |
2294b616 | 1553 | { |
1554 | if (c->as->type != AS_DEFERRED) | |
1555 | { | |
1556 | gfc_error ("Allocatable component of structure at %C must have a " | |
1557 | "deferred shape"); | |
b3704193 | 1558 | t = FAILURE; |
4ee9c684 | 1559 | } |
1560 | } | |
1561 | else | |
1562 | { | |
1563 | if (c->as->type != AS_EXPLICIT) | |
1564 | { | |
1a9745d2 | 1565 | gfc_error ("Array component of structure at %C must have an " |
1566 | "explicit shape"); | |
b3704193 | 1567 | t = FAILURE; |
4ee9c684 | 1568 | } |
1569 | } | |
1570 | ||
b3704193 | 1571 | scalar: |
1572 | if (c->ts.type == BT_CLASS) | |
09c509ed | 1573 | gfc_build_class_symbol (&c->ts, &c->attr, &c->as, true); |
b3704193 | 1574 | |
1575 | return t; | |
4ee9c684 | 1576 | } |
1577 | ||
1578 | ||
1579 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1580 | ||
1581 | match | |
1a9745d2 | 1582 | gfc_match_null (gfc_expr **result) |
4ee9c684 | 1583 | { |
1584 | gfc_symbol *sym; | |
4ee9c684 | 1585 | match m; |
1586 | ||
1587 | m = gfc_match (" null ( )"); | |
1588 | if (m != MATCH_YES) | |
1589 | return m; | |
1590 | ||
1591 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1592 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1593 | { | |
1594 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1595 | return MATCH_ERROR; | |
1596 | } | |
1597 | ||
1598 | gfc_intrinsic_symbol (sym); | |
1599 | ||
1600 | if (sym->attr.proc != PROC_INTRINSIC | |
950683ed | 1601 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1602 | sym->name, NULL) == FAILURE | |
1603 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
4ee9c684 | 1604 | return MATCH_ERROR; |
1605 | ||
126387b5 | 1606 | *result = gfc_get_null_expr (&gfc_current_locus); |
4ee9c684 | 1607 | |
1608 | return MATCH_YES; | |
1609 | } | |
1610 | ||
1611 | ||
4ee9c684 | 1612 | /* Match a variable name with an optional initializer. When this |
1613 | subroutine is called, a variable is expected to be parsed next. | |
1614 | Depending on what is happening at the moment, updates either the | |
1615 | symbol table or the current interface. */ | |
1616 | ||
1617 | static match | |
3923b69f | 1618 | variable_decl (int elem) |
4ee9c684 | 1619 | { |
1620 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1621 | gfc_expr *initializer, *char_len; | |
1622 | gfc_array_spec *as; | |
b549d2a5 | 1623 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
4ee9c684 | 1624 | gfc_charlen *cl; |
1625 | locus var_locus; | |
1626 | match m; | |
f6bb8f4b | 1627 | gfc_try t; |
b549d2a5 | 1628 | gfc_symbol *sym; |
4ee9c684 | 1629 | |
1630 | initializer = NULL; | |
1631 | as = NULL; | |
b549d2a5 | 1632 | cp_as = NULL; |
4ee9c684 | 1633 | |
1634 | /* When we get here, we've just matched a list of attributes and | |
1635 | maybe a type and a double colon. The next thing we expect to see | |
1636 | is the name of the symbol. */ | |
1637 | m = gfc_match_name (name); | |
1638 | if (m != MATCH_YES) | |
1639 | goto cleanup; | |
1640 | ||
cbb9e6aa | 1641 | var_locus = gfc_current_locus; |
4ee9c684 | 1642 | |
1643 | /* Now we could see the optional array spec. or character length. */ | |
aff518b0 | 1644 | m = gfc_match_array_spec (&as, true, true); |
b549d2a5 | 1645 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1646 | cp_as = gfc_copy_array_spec (as); | |
1647 | else if (m == MATCH_ERROR) | |
4ee9c684 | 1648 | goto cleanup; |
3b6a4b41 | 1649 | |
4ee9c684 | 1650 | if (m == MATCH_NO) |
1651 | as = gfc_copy_array_spec (current_as); | |
e97ac7c0 | 1652 | else if (current_as) |
1653 | merge_array_spec (current_as, as, true); | |
4ee9c684 | 1654 | |
1655 | char_len = NULL; | |
1656 | cl = NULL; | |
1657 | ||
1658 | if (current_ts.type == BT_CHARACTER) | |
1659 | { | |
1660 | switch (match_char_length (&char_len)) | |
1661 | { | |
1662 | case MATCH_YES: | |
d270ce52 | 1663 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
4ee9c684 | 1664 | |
1665 | cl->length = char_len; | |
1666 | break; | |
1667 | ||
3923b69f | 1668 | /* Non-constant lengths need to be copied after the first |
04b61f60 | 1669 | element. Also copy assumed lengths. */ |
4ee9c684 | 1670 | case MATCH_NO: |
04b61f60 | 1671 | if (elem > 1 |
eeebe20b | 1672 | && (current_ts.u.cl->length == NULL |
1673 | || current_ts.u.cl->length->expr_type != EXPR_CONSTANT)) | |
3923b69f | 1674 | { |
d270ce52 | 1675 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
eeebe20b | 1676 | cl->length = gfc_copy_expr (current_ts.u.cl->length); |
3923b69f | 1677 | } |
1678 | else | |
eeebe20b | 1679 | cl = current_ts.u.cl; |
3923b69f | 1680 | |
4ee9c684 | 1681 | break; |
1682 | ||
1683 | case MATCH_ERROR: | |
1684 | goto cleanup; | |
1685 | } | |
1686 | } | |
1687 | ||
b549d2a5 | 1688 | /* If this symbol has already shown up in a Cray Pointer declaration, |
f6d0e37a | 1689 | then we want to set the type & bail out. */ |
b549d2a5 | 1690 | if (gfc_option.flag_cray_pointer) |
1691 | { | |
1692 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1693 | if (sym != NULL && sym->attr.cray_pointee) | |
1694 | { | |
1695 | sym->ts.type = current_ts.type; | |
1696 | sym->ts.kind = current_ts.kind; | |
eeebe20b | 1697 | sym->ts.u.cl = cl; |
1698 | sym->ts.u.derived = current_ts.u.derived; | |
c5d33754 | 1699 | sym->ts.is_c_interop = current_ts.is_c_interop; |
1700 | sym->ts.is_iso_c = current_ts.is_iso_c; | |
b549d2a5 | 1701 | m = MATCH_YES; |
1702 | ||
1703 | /* Check to see if we have an array specification. */ | |
1704 | if (cp_as != NULL) | |
1705 | { | |
1706 | if (sym->as != NULL) | |
1707 | { | |
7698a624 | 1708 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 1709 | gfc_free_array_spec (cp_as); |
1710 | m = MATCH_ERROR; | |
1711 | goto cleanup; | |
1712 | } | |
1713 | else | |
1714 | { | |
1715 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1716 | gfc_internal_error ("Couldn't set pointee array spec."); | |
e14bee04 | 1717 | |
b549d2a5 | 1718 | /* Fix the array spec. */ |
e14bee04 | 1719 | m = gfc_mod_pointee_as (sym->as); |
b549d2a5 | 1720 | if (m == MATCH_ERROR) |
1721 | goto cleanup; | |
1722 | } | |
e14bee04 | 1723 | } |
b549d2a5 | 1724 | goto cleanup; |
1725 | } | |
1726 | else | |
1727 | { | |
1728 | gfc_free_array_spec (cp_as); | |
1729 | } | |
1730 | } | |
e14bee04 | 1731 | |
1e057e9b | 1732 | /* Procedure pointer as function result. */ |
1733 | if (gfc_current_state () == COMP_FUNCTION | |
1734 | && strcmp ("ppr@", gfc_current_block ()->name) == 0 | |
1735 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0) | |
1736 | strcpy (name, "ppr@"); | |
1737 | ||
1738 | if (gfc_current_state () == COMP_FUNCTION | |
1739 | && strcmp (name, gfc_current_block ()->name) == 0 | |
1740 | && gfc_current_block ()->result | |
1741 | && strcmp ("ppr@", gfc_current_block ()->result->name) == 0) | |
1742 | strcpy (name, "ppr@"); | |
e14bee04 | 1743 | |
4ee9c684 | 1744 | /* OK, we've successfully matched the declaration. Now put the |
1745 | symbol in the current namespace, because it might be used in the | |
fe06c0d5 | 1746 | optional initialization expression for this symbol, e.g. this is |
4ee9c684 | 1747 | perfectly legal: |
1748 | ||
1749 | integer, parameter :: i = huge(i) | |
1750 | ||
1751 | This is only true for parameters or variables of a basic type. | |
1752 | For components of derived types, it is not true, so we don't | |
1753 | create a symbol for those yet. If we fail to create the symbol, | |
1754 | bail out. */ | |
1755 | if (gfc_current_state () != COMP_DERIVED | |
1756 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1757 | { | |
b8a51d79 | 1758 | m = MATCH_ERROR; |
1759 | goto cleanup; | |
1760 | } | |
1761 | ||
60fbbf9e | 1762 | /* An interface body specifies all of the procedure's |
1763 | characteristics and these shall be consistent with those | |
1764 | specified in the procedure definition, except that the interface | |
1765 | may specify a procedure that is not pure if the procedure is | |
1766 | defined to be pure(12.3.2). */ | |
b8a51d79 | 1767 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1768 | && gfc_current_ns->proc_name |
1769 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
eeebe20b | 1770 | && current_ts.u.derived->ns != gfc_current_ns) |
c723595c | 1771 | { |
1772 | gfc_symtree *st; | |
eeebe20b | 1773 | st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.u.derived->name); |
1774 | if (!(current_ts.u.derived->attr.imported | |
c723595c | 1775 | && st != NULL |
eeebe20b | 1776 | && st->n.sym == current_ts.u.derived) |
c723595c | 1777 | && !gfc_current_ns->has_import_set) |
1778 | { | |
1779 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1780 | "interface", name); | |
1781 | m = MATCH_ERROR; | |
1782 | goto cleanup; | |
1783 | } | |
4ee9c684 | 1784 | } |
1785 | ||
1786 | /* In functions that have a RESULT variable defined, the function | |
1787 | name always refers to function calls. Therefore, the name is | |
1788 | not allowed to appear in specification statements. */ | |
1789 | if (gfc_current_state () == COMP_FUNCTION | |
1790 | && gfc_current_block () != NULL | |
1791 | && gfc_current_block ()->result != NULL | |
1792 | && gfc_current_block ()->result != gfc_current_block () | |
1793 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1794 | { | |
1795 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1796 | m = MATCH_ERROR; | |
1797 | goto cleanup; | |
1798 | } | |
1799 | ||
b4f45d02 | 1800 | /* We allow old-style initializations of the form |
1801 | integer i /2/, j(4) /3*3, 1/ | |
1802 | (if no colon has been seen). These are different from data | |
1803 | statements in that initializers are only allowed to apply to the | |
1804 | variable immediately preceding, i.e. | |
1805 | integer i, j /1, 2/ | |
1806 | is not allowed. Therefore we have to do some work manually, that | |
cca3db55 | 1807 | could otherwise be left to the matchers for DATA statements. */ |
b4f45d02 | 1808 | |
1809 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1810 | { | |
1811 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1812 | "initialization at %C") == FAILURE) | |
1813 | return MATCH_ERROR; | |
e14bee04 | 1814 | |
b4f45d02 | 1815 | return match_old_style_init (name); |
1816 | } | |
1817 | ||
4ee9c684 | 1818 | /* The double colon must be present in order to have initializers. |
1819 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1820 | if (colon_seen) | |
1821 | { | |
1822 | if (gfc_match (" =>") == MATCH_YES) | |
1823 | { | |
4ee9c684 | 1824 | if (!current_attr.pointer) |
1825 | { | |
1826 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1827 | m = MATCH_ERROR; | |
1828 | goto cleanup; | |
1829 | } | |
1830 | ||
1831 | m = gfc_match_null (&initializer); | |
1832 | if (m == MATCH_NO) | |
1833 | { | |
e4789c62 | 1834 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
4ee9c684 | 1835 | m = MATCH_ERROR; |
1836 | } | |
1837 | ||
0407b7df | 1838 | if (gfc_pure (NULL) && gfc_state_stack->state != COMP_DERIVED) |
4ee9c684 | 1839 | { |
1a9745d2 | 1840 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1841 | "a PURE procedure"); | |
4ee9c684 | 1842 | m = MATCH_ERROR; |
1843 | } | |
1844 | ||
1845 | if (m != MATCH_YES) | |
1846 | goto cleanup; | |
1847 | ||
4ee9c684 | 1848 | } |
1849 | else if (gfc_match_char ('=') == MATCH_YES) | |
1850 | { | |
1851 | if (current_attr.pointer) | |
1852 | { | |
1a9745d2 | 1853 | gfc_error ("Pointer initialization at %C requires '=>', " |
1854 | "not '='"); | |
4ee9c684 | 1855 | m = MATCH_ERROR; |
1856 | goto cleanup; | |
1857 | } | |
1858 | ||
1859 | m = gfc_match_init_expr (&initializer); | |
1860 | if (m == MATCH_NO) | |
1861 | { | |
1862 | gfc_error ("Expected an initialization expression at %C"); | |
1863 | m = MATCH_ERROR; | |
1864 | } | |
1865 | ||
b3a420c5 | 1866 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL) |
1867 | && gfc_state_stack->state != COMP_DERIVED) | |
4ee9c684 | 1868 | { |
1a9745d2 | 1869 | gfc_error ("Initialization of variable at %C is not allowed in " |
1870 | "a PURE procedure"); | |
4ee9c684 | 1871 | m = MATCH_ERROR; |
1872 | } | |
1873 | ||
1874 | if (m != MATCH_YES) | |
1875 | goto cleanup; | |
1876 | } | |
8ffad0f9 | 1877 | } |
1878 | ||
2294b616 | 1879 | if (initializer != NULL && current_attr.allocatable |
1880 | && gfc_current_state () == COMP_DERIVED) | |
1881 | { | |
1a9745d2 | 1882 | gfc_error ("Initialization of allocatable component at %C is not " |
1883 | "allowed"); | |
2294b616 | 1884 | m = MATCH_ERROR; |
1885 | goto cleanup; | |
1886 | } | |
1887 | ||
d9b3f26b | 1888 | /* Add the initializer. Note that it is fine if initializer is |
4ee9c684 | 1889 | NULL here, because we sometimes also need to check if a |
1890 | declaration *must* have an initialization expression. */ | |
1891 | if (gfc_current_state () != COMP_DERIVED) | |
1892 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1893 | else | |
d9b3f26b | 1894 | { |
2294b616 | 1895 | if (current_ts.type == BT_DERIVED |
1a9745d2 | 1896 | && !current_attr.pointer && !initializer) |
d9b3f26b | 1897 | initializer = gfc_default_initializer (¤t_ts); |
1898 | t = build_struct (name, cl, &initializer, &as); | |
1899 | } | |
4ee9c684 | 1900 | |
1901 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1902 | ||
1903 | cleanup: | |
1904 | /* Free stuff up and return. */ | |
1905 | gfc_free_expr (initializer); | |
1906 | gfc_free_array_spec (as); | |
1907 | ||
1908 | return m; | |
1909 | } | |
1910 | ||
1911 | ||
d10f89ee | 1912 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
1913 | This assumes that the byte size is equal to the kind number for | |
1914 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
4ee9c684 | 1915 | |
1916 | match | |
1a9745d2 | 1917 | gfc_match_old_kind_spec (gfc_typespec *ts) |
4ee9c684 | 1918 | { |
1919 | match m; | |
3bd3b616 | 1920 | int original_kind; |
4ee9c684 | 1921 | |
1922 | if (gfc_match_char ('*') != MATCH_YES) | |
1923 | return MATCH_NO; | |
1924 | ||
3bd3b616 | 1925 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
4ee9c684 | 1926 | if (m != MATCH_YES) |
1927 | return MATCH_ERROR; | |
1928 | ||
b118a35b | 1929 | original_kind = ts->kind; |
1930 | ||
4ee9c684 | 1931 | /* Massage the kind numbers for complex types. */ |
b118a35b | 1932 | if (ts->type == BT_COMPLEX) |
1933 | { | |
1934 | if (ts->kind % 2) | |
1a9745d2 | 1935 | { |
1936 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1937 | gfc_basic_typename (ts->type), original_kind); | |
1938 | return MATCH_ERROR; | |
1939 | } | |
b118a35b | 1940 | ts->kind /= 2; |
1941 | } | |
4ee9c684 | 1942 | |
f2d4ef3b | 1943 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 1944 | { |
b118a35b | 1945 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
1a9745d2 | 1946 | gfc_basic_typename (ts->type), original_kind); |
4ee9c684 | 1947 | return MATCH_ERROR; |
1948 | } | |
1949 | ||
be7f01a1 | 1950 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
1951 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1952 | return MATCH_ERROR; | |
1953 | ||
4ee9c684 | 1954 | return MATCH_YES; |
1955 | } | |
1956 | ||
1957 | ||
1958 | /* Match a kind specification. Since kinds are generally optional, we | |
1959 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1960 | string is found, then we know we have an error. */ | |
1961 | ||
1962 | match | |
67a51c8e | 1963 | gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only) |
4ee9c684 | 1964 | { |
67a51c8e | 1965 | locus where, loc; |
4ee9c684 | 1966 | gfc_expr *e; |
1967 | match m, n; | |
c632ff3d | 1968 | char c; |
4ee9c684 | 1969 | const char *msg; |
1970 | ||
1971 | m = MATCH_NO; | |
67a51c8e | 1972 | n = MATCH_YES; |
4ee9c684 | 1973 | e = NULL; |
1974 | ||
67a51c8e | 1975 | where = loc = gfc_current_locus; |
1976 | ||
1977 | if (kind_expr_only) | |
1978 | goto kind_expr; | |
4ee9c684 | 1979 | |
1980 | if (gfc_match_char ('(') == MATCH_NO) | |
1981 | return MATCH_NO; | |
1982 | ||
1983 | /* Also gobbles optional text. */ | |
1984 | if (gfc_match (" kind = ") == MATCH_YES) | |
1985 | m = MATCH_ERROR; | |
1986 | ||
67a51c8e | 1987 | loc = gfc_current_locus; |
1988 | ||
1989 | kind_expr: | |
4ee9c684 | 1990 | n = gfc_match_init_expr (&e); |
67a51c8e | 1991 | |
4ee9c684 | 1992 | if (n != MATCH_YES) |
67a51c8e | 1993 | { |
077932f9 | 1994 | if (gfc_matching_function) |
67a51c8e | 1995 | { |
077932f9 | 1996 | /* The function kind expression might include use associated or |
1997 | imported parameters and try again after the specification | |
1998 | expressions..... */ | |
67a51c8e | 1999 | if (gfc_match_char (')') != MATCH_YES) |
2000 | { | |
2001 | gfc_error ("Missing right parenthesis at %C"); | |
2002 | m = MATCH_ERROR; | |
2003 | goto no_match; | |
2004 | } | |
2005 | ||
2006 | gfc_free_expr (e); | |
67a51c8e | 2007 | gfc_undo_symbols (); |
2008 | return MATCH_YES; | |
2009 | } | |
2010 | else | |
2011 | { | |
2012 | /* ....or else, the match is real. */ | |
2013 | if (n == MATCH_NO) | |
2014 | gfc_error ("Expected initialization expression at %C"); | |
2015 | if (n != MATCH_YES) | |
2016 | return MATCH_ERROR; | |
2017 | } | |
2018 | } | |
4ee9c684 | 2019 | |
2020 | if (e->rank != 0) | |
2021 | { | |
2022 | gfc_error ("Expected scalar initialization expression at %C"); | |
2023 | m = MATCH_ERROR; | |
2024 | goto no_match; | |
2025 | } | |
2026 | ||
2027 | msg = gfc_extract_int (e, &ts->kind); | |
077932f9 | 2028 | |
4ee9c684 | 2029 | if (msg != NULL) |
2030 | { | |
2031 | gfc_error (msg); | |
2032 | m = MATCH_ERROR; | |
2033 | goto no_match; | |
2034 | } | |
2035 | ||
c5d33754 | 2036 | /* Before throwing away the expression, let's see if we had a |
2037 | C interoperable kind (and store the fact). */ | |
2038 | if (e->ts.is_c_interop == 1) | |
2039 | { | |
2040 | /* Mark this as c interoperable if being declared with one | |
2041 | of the named constants from iso_c_binding. */ | |
2042 | ts->is_c_interop = e->ts.is_iso_c; | |
2043 | ts->f90_type = e->ts.f90_type; | |
2044 | } | |
2045 | ||
4ee9c684 | 2046 | gfc_free_expr (e); |
2047 | e = NULL; | |
2048 | ||
c5d33754 | 2049 | /* Ignore errors to this point, if we've gotten here. This means |
2050 | we ignore the m=MATCH_ERROR from above. */ | |
f2d4ef3b | 2051 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
4ee9c684 | 2052 | { |
2053 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
2054 | gfc_basic_typename (ts->type)); | |
c632ff3d | 2055 | gfc_current_locus = where; |
2056 | return MATCH_ERROR; | |
4ee9c684 | 2057 | } |
c632ff3d | 2058 | |
209d3778 | 2059 | /* Warn if, e.g., c_int is used for a REAL variable, but not |
2060 | if, e.g., c_double is used for COMPLEX as the standard | |
2061 | explicitly says that the kind type parameter for complex and real | |
2062 | variable is the same, i.e. c_float == c_float_complex. */ | |
2063 | if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type | |
2064 | && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX) | |
2065 | || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL))) | |
ded233a6 | 2066 | gfc_warning_now ("C kind type parameter is for type %s but type at %L " |
2067 | "is %s", gfc_basic_typename (ts->f90_type), &where, | |
2068 | gfc_basic_typename (ts->type)); | |
209d3778 | 2069 | |
c632ff3d | 2070 | gfc_gobble_whitespace (); |
e0be6f02 | 2071 | if ((c = gfc_next_ascii_char ()) != ')' |
2072 | && (ts->type != BT_CHARACTER || c != ',')) | |
4ee9c684 | 2073 | { |
c632ff3d | 2074 | if (ts->type == BT_CHARACTER) |
2075 | gfc_error ("Missing right parenthesis or comma at %C"); | |
2076 | else | |
2077 | gfc_error ("Missing right parenthesis at %C"); | |
67a51c8e | 2078 | m = MATCH_ERROR; |
4ee9c684 | 2079 | } |
c5d33754 | 2080 | else |
2081 | /* All tests passed. */ | |
2082 | m = MATCH_YES; | |
4ee9c684 | 2083 | |
c5d33754 | 2084 | if(m == MATCH_ERROR) |
2085 | gfc_current_locus = where; | |
2086 | ||
2087 | /* Return what we know from the test(s). */ | |
2088 | return m; | |
4ee9c684 | 2089 | |
2090 | no_match: | |
2091 | gfc_free_expr (e); | |
cbb9e6aa | 2092 | gfc_current_locus = where; |
4ee9c684 | 2093 | return m; |
2094 | } | |
2095 | ||
2096 | ||
33399208 | 2097 | static match |
2098 | match_char_kind (int * kind, int * is_iso_c) | |
2099 | { | |
2100 | locus where; | |
2101 | gfc_expr *e; | |
2102 | match m, n; | |
2103 | const char *msg; | |
2104 | ||
2105 | m = MATCH_NO; | |
2106 | e = NULL; | |
2107 | where = gfc_current_locus; | |
2108 | ||
2109 | n = gfc_match_init_expr (&e); | |
c632ff3d | 2110 | |
077932f9 | 2111 | if (n != MATCH_YES && gfc_matching_function) |
c632ff3d | 2112 | { |
077932f9 | 2113 | /* The expression might include use-associated or imported |
2114 | parameters and try again after the specification | |
2115 | expressions. */ | |
c632ff3d | 2116 | gfc_free_expr (e); |
c632ff3d | 2117 | gfc_undo_symbols (); |
2118 | return MATCH_YES; | |
2119 | } | |
2120 | ||
33399208 | 2121 | if (n == MATCH_NO) |
2122 | gfc_error ("Expected initialization expression at %C"); | |
2123 | if (n != MATCH_YES) | |
2124 | return MATCH_ERROR; | |
2125 | ||
2126 | if (e->rank != 0) | |
2127 | { | |
2128 | gfc_error ("Expected scalar initialization expression at %C"); | |
2129 | m = MATCH_ERROR; | |
2130 | goto no_match; | |
2131 | } | |
2132 | ||
2133 | msg = gfc_extract_int (e, kind); | |
2134 | *is_iso_c = e->ts.is_iso_c; | |
2135 | if (msg != NULL) | |
2136 | { | |
2137 | gfc_error (msg); | |
2138 | m = MATCH_ERROR; | |
2139 | goto no_match; | |
2140 | } | |
2141 | ||
2142 | gfc_free_expr (e); | |
2143 | ||
2144 | /* Ignore errors to this point, if we've gotten here. This means | |
2145 | we ignore the m=MATCH_ERROR from above. */ | |
2146 | if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0) | |
2147 | { | |
2148 | gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind); | |
2149 | m = MATCH_ERROR; | |
2150 | } | |
2151 | else | |
2152 | /* All tests passed. */ | |
2153 | m = MATCH_YES; | |
2154 | ||
2155 | if (m == MATCH_ERROR) | |
2156 | gfc_current_locus = where; | |
2157 | ||
2158 | /* Return what we know from the test(s). */ | |
2159 | return m; | |
2160 | ||
2161 | no_match: | |
2162 | gfc_free_expr (e); | |
2163 | gfc_current_locus = where; | |
2164 | return m; | |
2165 | } | |
2166 | ||
10f5dcc0 | 2167 | |
4ee9c684 | 2168 | /* Match the various kind/length specifications in a CHARACTER |
2169 | declaration. We don't return MATCH_NO. */ | |
2170 | ||
10f5dcc0 | 2171 | match |
2172 | gfc_match_char_spec (gfc_typespec *ts) | |
4ee9c684 | 2173 | { |
33399208 | 2174 | int kind, seen_length, is_iso_c; |
4ee9c684 | 2175 | gfc_charlen *cl; |
2176 | gfc_expr *len; | |
2177 | match m; | |
33399208 | 2178 | |
4ee9c684 | 2179 | len = NULL; |
2180 | seen_length = 0; | |
33399208 | 2181 | kind = 0; |
2182 | is_iso_c = 0; | |
4ee9c684 | 2183 | |
2184 | /* Try the old-style specification first. */ | |
2185 | old_char_selector = 0; | |
2186 | ||
2187 | m = match_char_length (&len); | |
2188 | if (m != MATCH_NO) | |
2189 | { | |
2190 | if (m == MATCH_YES) | |
2191 | old_char_selector = 1; | |
2192 | seen_length = 1; | |
2193 | goto done; | |
2194 | } | |
2195 | ||
2196 | m = gfc_match_char ('('); | |
2197 | if (m != MATCH_YES) | |
2198 | { | |
c5d33754 | 2199 | m = MATCH_YES; /* Character without length is a single char. */ |
4ee9c684 | 2200 | goto done; |
2201 | } | |
2202 | ||
c5d33754 | 2203 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ |
4ee9c684 | 2204 | if (gfc_match (" kind =") == MATCH_YES) |
2205 | { | |
33399208 | 2206 | m = match_char_kind (&kind, &is_iso_c); |
c5d33754 | 2207 | |
4ee9c684 | 2208 | if (m == MATCH_ERROR) |
2209 | goto done; | |
2210 | if (m == MATCH_NO) | |
2211 | goto syntax; | |
2212 | ||
2213 | if (gfc_match (" , len =") == MATCH_NO) | |
2214 | goto rparen; | |
2215 | ||
2216 | m = char_len_param_value (&len); | |
2217 | if (m == MATCH_NO) | |
2218 | goto syntax; | |
2219 | if (m == MATCH_ERROR) | |
2220 | goto done; | |
2221 | seen_length = 1; | |
2222 | ||
2223 | goto rparen; | |
2224 | } | |
2225 | ||
f6d0e37a | 2226 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ |
4ee9c684 | 2227 | if (gfc_match (" len =") == MATCH_YES) |
2228 | { | |
2229 | m = char_len_param_value (&len); | |
2230 | if (m == MATCH_NO) | |
2231 | goto syntax; | |
2232 | if (m == MATCH_ERROR) | |
2233 | goto done; | |
2234 | seen_length = 1; | |
2235 | ||
2236 | if (gfc_match_char (')') == MATCH_YES) | |
2237 | goto done; | |
2238 | ||
2239 | if (gfc_match (" , kind =") != MATCH_YES) | |
2240 | goto syntax; | |
2241 | ||
33399208 | 2242 | if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR) |
2243 | goto done; | |
4ee9c684 | 2244 | |
2245 | goto rparen; | |
2246 | } | |
2247 | ||
f6d0e37a | 2248 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
4ee9c684 | 2249 | m = char_len_param_value (&len); |
2250 | if (m == MATCH_NO) | |
2251 | goto syntax; | |
2252 | if (m == MATCH_ERROR) | |
2253 | goto done; | |
2254 | seen_length = 1; | |
2255 | ||
2256 | m = gfc_match_char (')'); | |
2257 | if (m == MATCH_YES) | |
2258 | goto done; | |
2259 | ||
2260 | if (gfc_match_char (',') != MATCH_YES) | |
2261 | goto syntax; | |
2262 | ||
c5d33754 | 2263 | gfc_match (" kind ="); /* Gobble optional text. */ |
4ee9c684 | 2264 | |
33399208 | 2265 | m = match_char_kind (&kind, &is_iso_c); |
4ee9c684 | 2266 | if (m == MATCH_ERROR) |
2267 | goto done; | |
2268 | if (m == MATCH_NO) | |
2269 | goto syntax; | |
2270 | ||
2271 | rparen: | |
2272 | /* Require a right-paren at this point. */ | |
2273 | m = gfc_match_char (')'); | |
2274 | if (m == MATCH_YES) | |
2275 | goto done; | |
2276 | ||
2277 | syntax: | |
2278 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
2279 | m = MATCH_ERROR; | |
a3cbe8cc | 2280 | gfc_free_expr (len); |
2281 | return m; | |
4ee9c684 | 2282 | |
2283 | done: | |
8d39570e | 2284 | /* Deal with character functions after USE and IMPORT statements. */ |
2285 | if (gfc_matching_function) | |
077932f9 | 2286 | { |
8d39570e | 2287 | gfc_free_expr (len); |
077932f9 | 2288 | gfc_undo_symbols (); |
2289 | return MATCH_YES; | |
2290 | } | |
2291 | ||
4ee9c684 | 2292 | if (m != MATCH_YES) |
2293 | { | |
2294 | gfc_free_expr (len); | |
2295 | return m; | |
2296 | } | |
2297 | ||
2298 | /* Do some final massaging of the length values. */ | |
d270ce52 | 2299 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
4ee9c684 | 2300 | |
2301 | if (seen_length == 0) | |
126387b5 | 2302 | cl->length = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1); |
4ee9c684 | 2303 | else |
2fe2caa6 | 2304 | cl->length = len; |
4ee9c684 | 2305 | |
eeebe20b | 2306 | ts->u.cl = cl; |
33399208 | 2307 | ts->kind = kind == 0 ? gfc_default_character_kind : kind; |
4ee9c684 | 2308 | |
c5d33754 | 2309 | /* We have to know if it was a c interoperable kind so we can |
2310 | do accurate type checking of bind(c) procs, etc. */ | |
33399208 | 2311 | if (kind != 0) |
2312 | /* Mark this as c interoperable if being declared with one | |
2313 | of the named constants from iso_c_binding. */ | |
2314 | ts->is_c_interop = is_iso_c; | |
c5d33754 | 2315 | else if (len != NULL) |
33399208 | 2316 | /* Here, we might have parsed something such as: character(c_char) |
2317 | In this case, the parsing code above grabs the c_char when | |
2318 | looking for the length (line 1690, roughly). it's the last | |
2319 | testcase for parsing the kind params of a character variable. | |
2320 | However, it's not actually the length. this seems like it | |
2321 | could be an error. | |
2322 | To see if the user used a C interop kind, test the expr | |
2323 | of the so called length, and see if it's C interoperable. */ | |
2324 | ts->is_c_interop = len->ts.is_iso_c; | |
c5d33754 | 2325 | |
4ee9c684 | 2326 | return MATCH_YES; |
2327 | } | |
2328 | ||
2329 | ||
e8152f13 | 2330 | /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts |
2331 | structure to the matched specification. This is necessary for FUNCTION and | |
4ee9c684 | 2332 | IMPLICIT statements. |
2333 | ||
e14bee04 | 2334 | If implicit_flag is nonzero, then we don't check for the optional |
39351103 | 2335 | kind specification. Not doing so is needed for matching an IMPLICIT |
4ee9c684 | 2336 | statement correctly. */ |
2337 | ||
67a51c8e | 2338 | match |
e8152f13 | 2339 | gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag) |
4ee9c684 | 2340 | { |
2341 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2342 | gfc_symbol *sym; | |
2343 | match m; | |
e0be6f02 | 2344 | char c; |
077932f9 | 2345 | bool seen_deferred_kind; |
4ee9c684 | 2346 | |
077932f9 | 2347 | /* A belt and braces check that the typespec is correctly being treated |
2348 | as a deferred characteristic association. */ | |
2349 | seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION) | |
8d39570e | 2350 | && (gfc_current_block ()->result->ts.kind == -1) |
2351 | && (ts->kind == -1); | |
4ee9c684 | 2352 | gfc_clear_ts (ts); |
077932f9 | 2353 | if (seen_deferred_kind) |
2354 | ts->kind = -1; | |
4ee9c684 | 2355 | |
c5d33754 | 2356 | /* Clear the current binding label, in case one is given. */ |
2357 | curr_binding_label[0] = '\0'; | |
2358 | ||
25b29122 | 2359 | if (gfc_match (" byte") == MATCH_YES) |
2360 | { | |
2c89e2a0 | 2361 | if (gfc_notify_std (GFC_STD_GNU, "Extension: BYTE type at %C") |
25b29122 | 2362 | == FAILURE) |
2363 | return MATCH_ERROR; | |
2364 | ||
2365 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
2366 | { | |
2367 | gfc_error ("BYTE type used at %C " | |
2368 | "is not available on the target machine"); | |
2369 | return MATCH_ERROR; | |
2370 | } | |
e14bee04 | 2371 | |
25b29122 | 2372 | ts->type = BT_INTEGER; |
2373 | ts->kind = 1; | |
2374 | return MATCH_YES; | |
2375 | } | |
2376 | ||
4ee9c684 | 2377 | if (gfc_match (" integer") == MATCH_YES) |
2378 | { | |
2379 | ts->type = BT_INTEGER; | |
b8a891cb | 2380 | ts->kind = gfc_default_integer_kind; |
4ee9c684 | 2381 | goto get_kind; |
2382 | } | |
2383 | ||
2384 | if (gfc_match (" character") == MATCH_YES) | |
2385 | { | |
2386 | ts->type = BT_CHARACTER; | |
39351103 | 2387 | if (implicit_flag == 0) |
10f5dcc0 | 2388 | return gfc_match_char_spec (ts); |
39351103 | 2389 | else |
2390 | return MATCH_YES; | |
4ee9c684 | 2391 | } |
2392 | ||
2393 | if (gfc_match (" real") == MATCH_YES) | |
2394 | { | |
2395 | ts->type = BT_REAL; | |
b8a891cb | 2396 | ts->kind = gfc_default_real_kind; |
4ee9c684 | 2397 | goto get_kind; |
2398 | } | |
2399 | ||
2400 | if (gfc_match (" double precision") == MATCH_YES) | |
2401 | { | |
2402 | ts->type = BT_REAL; | |
b8a891cb | 2403 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2404 | return MATCH_YES; |
2405 | } | |
2406 | ||
2407 | if (gfc_match (" complex") == MATCH_YES) | |
2408 | { | |
2409 | ts->type = BT_COMPLEX; | |
b8a891cb | 2410 | ts->kind = gfc_default_complex_kind; |
4ee9c684 | 2411 | goto get_kind; |
2412 | } | |
2413 | ||
2414 | if (gfc_match (" double complex") == MATCH_YES) | |
2415 | { | |
be7f01a1 | 2416 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
2417 | "conform to the Fortran 95 standard") == FAILURE) | |
2418 | return MATCH_ERROR; | |
2419 | ||
4ee9c684 | 2420 | ts->type = BT_COMPLEX; |
b8a891cb | 2421 | ts->kind = gfc_default_double_kind; |
4ee9c684 | 2422 | return MATCH_YES; |
2423 | } | |
2424 | ||
2425 | if (gfc_match (" logical") == MATCH_YES) | |
2426 | { | |
2427 | ts->type = BT_LOGICAL; | |
b8a891cb | 2428 | ts->kind = gfc_default_logical_kind; |
4ee9c684 | 2429 | goto get_kind; |
2430 | } | |
2431 | ||
2432 | m = gfc_match (" type ( %n )", name); | |
1de1b1a9 | 2433 | if (m == MATCH_YES) |
2434 | ts->type = BT_DERIVED; | |
2435 | else | |
8ca7f89c | 2436 | { |
2437 | m = gfc_match (" class ( %n )", name); | |
2438 | if (m != MATCH_YES) | |
2439 | return m; | |
1de1b1a9 | 2440 | ts->type = BT_CLASS; |
8ca7f89c | 2441 | |
e8152f13 | 2442 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: CLASS statement at %C") |
2443 | == FAILURE) | |
2444 | return MATCH_ERROR; | |
8ca7f89c | 2445 | } |
4ee9c684 | 2446 | |
077932f9 | 2447 | /* Defer association of the derived type until the end of the |
2448 | specification block. However, if the derived type can be | |
2449 | found, add it to the typespec. */ | |
2450 | if (gfc_matching_function) | |
67a51c8e | 2451 | { |
eeebe20b | 2452 | ts->u.derived = NULL; |
077932f9 | 2453 | if (gfc_current_state () != COMP_INTERFACE |
2454 | && !gfc_find_symbol (name, NULL, 1, &sym) && sym) | |
eeebe20b | 2455 | ts->u.derived = sym; |
67a51c8e | 2456 | return MATCH_YES; |
2457 | } | |
2458 | ||
2459 | /* Search for the name but allow the components to be defined later. If | |
2460 | type = -1, this typespec has been seen in a function declaration but | |
077932f9 | 2461 | the type could not be accessed at that point. */ |
2462 | sym = NULL; | |
67a51c8e | 2463 | if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym)) |
4ee9c684 | 2464 | { |
2465 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2466 | return MATCH_ERROR; | |
2467 | } | |
67a51c8e | 2468 | else if (ts->kind == -1) |
2469 | { | |
077932f9 | 2470 | int iface = gfc_state_stack->previous->state != COMP_INTERFACE |
2471 | || gfc_current_ns->has_import_set; | |
2472 | if (gfc_find_symbol (name, NULL, iface, &sym)) | |
67a51c8e | 2473 | { |
2474 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2475 | return MATCH_ERROR; | |
2476 | } | |
2477 | ||
077932f9 | 2478 | ts->kind = 0; |
67a51c8e | 2479 | if (sym == NULL) |
2480 | return MATCH_NO; | |
2481 | } | |
4ee9c684 | 2482 | |
2483 | if (sym->attr.flavor != FL_DERIVED | |
950683ed | 2484 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 2485 | return MATCH_ERROR; |
2486 | ||
077932f9 | 2487 | gfc_set_sym_referenced (sym); |
eeebe20b | 2488 | ts->u.derived = sym; |
4ee9c684 | 2489 | |
2490 | return MATCH_YES; | |
2491 | ||
2492 | get_kind: | |
2493 | /* For all types except double, derived and character, look for an | |
2494 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
39351103 | 2495 | if (implicit_flag == 1) |
4ee9c684 | 2496 | return MATCH_YES; |
2497 | ||
18f3698a | 2498 | if (gfc_current_form == FORM_FREE) |
2499 | { | |
2c89e2a0 | 2500 | c = gfc_peek_ascii_char (); |
2501 | if (!gfc_is_whitespace (c) && c != '*' && c != '(' | |
1a9745d2 | 2502 | && c != ':' && c != ',') |
18f3698a | 2503 | return MATCH_NO; |
2504 | } | |
2505 | ||
67a51c8e | 2506 | m = gfc_match_kind_spec (ts, false); |
4ee9c684 | 2507 | if (m == MATCH_NO && ts->type != BT_CHARACTER) |
2508 | m = gfc_match_old_kind_spec (ts); | |
2509 | ||
077932f9 | 2510 | /* Defer association of the KIND expression of function results |
2511 | until after USE and IMPORT statements. */ | |
2512 | if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ()) | |
2513 | || gfc_matching_function) | |
2514 | return MATCH_YES; | |
2515 | ||
4ee9c684 | 2516 | if (m == MATCH_NO) |
2517 | m = MATCH_YES; /* No kind specifier found. */ | |
2518 | ||
2519 | return m; | |
2520 | } | |
2521 | ||
2522 | ||
39351103 | 2523 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
2524 | already matched in parse.c, or we would not end up here in the | |
2525 | first place. So the only thing we need to check, is if there is | |
2526 | trailing garbage. If not, the match is successful. */ | |
2527 | ||
2528 | match | |
2529 | gfc_match_implicit_none (void) | |
2530 | { | |
39351103 | 2531 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
2532 | } | |
2533 | ||
2534 | ||
2535 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
2536 | ||
2537 | static match | |
b70528c7 | 2538 | match_implicit_range (void) |
39351103 | 2539 | { |
e0be6f02 | 2540 | char c, c1, c2; |
2541 | int inner; | |
39351103 | 2542 | locus cur_loc; |
2543 | ||
2544 | cur_loc = gfc_current_locus; | |
2545 | ||
2546 | gfc_gobble_whitespace (); | |
e0be6f02 | 2547 | c = gfc_next_ascii_char (); |
39351103 | 2548 | if (c != '(') |
2549 | { | |
2550 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
2551 | goto bad; | |
2552 | } | |
2553 | ||
2554 | inner = 1; | |
2555 | while (inner) | |
2556 | { | |
2557 | gfc_gobble_whitespace (); | |
e0be6f02 | 2558 | c1 = gfc_next_ascii_char (); |
39351103 | 2559 | if (!ISALPHA (c1)) |
2560 | goto bad; | |
2561 | ||
2562 | gfc_gobble_whitespace (); | |
e0be6f02 | 2563 | c = gfc_next_ascii_char (); |
39351103 | 2564 | |
2565 | switch (c) | |
2566 | { | |
2567 | case ')': | |
f6d0e37a | 2568 | inner = 0; /* Fall through. */ |
39351103 | 2569 | |
2570 | case ',': | |
2571 | c2 = c1; | |
2572 | break; | |
2573 | ||
2574 | case '-': | |
2575 | gfc_gobble_whitespace (); | |
e0be6f02 | 2576 | c2 = gfc_next_ascii_char (); |
39351103 | 2577 | if (!ISALPHA (c2)) |
2578 | goto bad; | |
2579 | ||
2580 | gfc_gobble_whitespace (); | |
e0be6f02 | 2581 | c = gfc_next_ascii_char (); |
39351103 | 2582 | |
2583 | if ((c != ',') && (c != ')')) | |
2584 | goto bad; | |
2585 | if (c == ')') | |
2586 | inner = 0; | |
2587 | ||
2588 | break; | |
2589 | ||
2590 | default: | |
2591 | goto bad; | |
2592 | } | |
2593 | ||
2594 | if (c1 > c2) | |
2595 | { | |
2596 | gfc_error ("Letters must be in alphabetic order in " | |
2597 | "IMPLICIT statement at %C"); | |
2598 | goto bad; | |
2599 | } | |
2600 | ||
2601 | /* See if we can add the newly matched range to the pending | |
1a9745d2 | 2602 | implicits from this IMPLICIT statement. We do not check for |
2603 | conflicts with whatever earlier IMPLICIT statements may have | |
2604 | set. This is done when we've successfully finished matching | |
2605 | the current one. */ | |
b70528c7 | 2606 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
39351103 | 2607 | goto bad; |
2608 | } | |
2609 | ||
2610 | return MATCH_YES; | |
2611 | ||
2612 | bad: | |
2613 | gfc_syntax_error (ST_IMPLICIT); | |
2614 | ||
2615 | gfc_current_locus = cur_loc; | |
2616 | return MATCH_ERROR; | |
2617 | } | |
2618 | ||
2619 | ||
2620 | /* Match an IMPLICIT statement, storing the types for | |
2621 | gfc_set_implicit() if the statement is accepted by the parser. | |
2622 | There is a strange looking, but legal syntactic construction | |
2623 | possible. It looks like: | |
2624 | ||
2625 | IMPLICIT INTEGER (a-b) (c-d) | |
2626 | ||
2627 | This is legal if "a-b" is a constant expression that happens to | |
2628 | equal one of the legal kinds for integers. The real problem | |
2629 | happens with an implicit specification that looks like: | |
2630 | ||
2631 | IMPLICIT INTEGER (a-b) | |
2632 | ||
2633 | In this case, a typespec matcher that is "greedy" (as most of the | |
2634 | matchers are) gobbles the character range as a kindspec, leaving | |
2635 | nothing left. We therefore have to go a bit more slowly in the | |
2636 | matching process by inhibiting the kindspec checking during | |
2637 | typespec matching and checking for a kind later. */ | |
2638 | ||
2639 | match | |
2640 | gfc_match_implicit (void) | |
2641 | { | |
2642 | gfc_typespec ts; | |
2643 | locus cur_loc; | |
e0be6f02 | 2644 | char c; |
39351103 | 2645 | match m; |
2646 | ||
52179f31 | 2647 | gfc_clear_ts (&ts); |
2648 | ||
39351103 | 2649 | /* We don't allow empty implicit statements. */ |
2650 | if (gfc_match_eos () == MATCH_YES) | |
2651 | { | |
2652 | gfc_error ("Empty IMPLICIT statement at %C"); | |
2653 | return MATCH_ERROR; | |
2654 | } | |
2655 | ||
39351103 | 2656 | do |
2657 | { | |
b70528c7 | 2658 | /* First cleanup. */ |
2659 | gfc_clear_new_implicit (); | |
2660 | ||
39351103 | 2661 | /* A basic type is mandatory here. */ |
e8152f13 | 2662 | m = gfc_match_decl_type_spec (&ts, 1); |
39351103 | 2663 | if (m == MATCH_ERROR) |
2664 | goto error; | |
2665 | if (m == MATCH_NO) | |
2666 | goto syntax; | |
2667 | ||
2668 | cur_loc = gfc_current_locus; | |
b70528c7 | 2669 | m = match_implicit_range (); |
39351103 | 2670 | |
2671 | if (m == MATCH_YES) | |
2672 | { | |
b70528c7 | 2673 | /* We may have <TYPE> (<RANGE>). */ |
39351103 | 2674 | gfc_gobble_whitespace (); |
e0be6f02 | 2675 | c = gfc_next_ascii_char (); |
39351103 | 2676 | if ((c == '\n') || (c == ',')) |
b70528c7 | 2677 | { |
2678 | /* Check for CHARACTER with no length parameter. */ | |
eeebe20b | 2679 | if (ts.type == BT_CHARACTER && !ts.u.cl) |
b70528c7 | 2680 | { |
b8a891cb | 2681 | ts.kind = gfc_default_character_kind; |
d270ce52 | 2682 | ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
126387b5 | 2683 | ts.u.cl->length = gfc_get_int_expr (gfc_default_integer_kind, |
2684 | NULL, 1); | |
b70528c7 | 2685 | } |
2686 | ||
2687 | /* Record the Successful match. */ | |
2688 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2689 | return MATCH_ERROR; | |
2690 | continue; | |
2691 | } | |
39351103 | 2692 | |
2693 | gfc_current_locus = cur_loc; | |
2694 | } | |
2695 | ||
b70528c7 | 2696 | /* Discard the (incorrectly) matched range. */ |
2697 | gfc_clear_new_implicit (); | |
2698 | ||
2699 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
2700 | if (ts.type == BT_CHARACTER) | |
10f5dcc0 | 2701 | m = gfc_match_char_spec (&ts); |
b70528c7 | 2702 | else |
39351103 | 2703 | { |
67a51c8e | 2704 | m = gfc_match_kind_spec (&ts, false); |
39351103 | 2705 | if (m == MATCH_NO) |
b70528c7 | 2706 | { |
2707 | m = gfc_match_old_kind_spec (&ts); | |
2708 | if (m == MATCH_ERROR) | |
2709 | goto error; | |
2710 | if (m == MATCH_NO) | |
2711 | goto syntax; | |
2712 | } | |
39351103 | 2713 | } |
b70528c7 | 2714 | if (m == MATCH_ERROR) |
2715 | goto error; | |
39351103 | 2716 | |
b70528c7 | 2717 | m = match_implicit_range (); |
39351103 | 2718 | if (m == MATCH_ERROR) |
2719 | goto error; | |
2720 | if (m == MATCH_NO) | |
2721 | goto syntax; | |
2722 | ||
2723 | gfc_gobble_whitespace (); | |
e0be6f02 | 2724 | c = gfc_next_ascii_char (); |
39351103 | 2725 | if ((c != '\n') && (c != ',')) |
2726 | goto syntax; | |
2727 | ||
b70528c7 | 2728 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2729 | return MATCH_ERROR; | |
39351103 | 2730 | } |
2731 | while (c == ','); | |
2732 | ||
b70528c7 | 2733 | return MATCH_YES; |
39351103 | 2734 | |
2735 | syntax: | |
2736 | gfc_syntax_error (ST_IMPLICIT); | |
2737 | ||
2738 | error: | |
2739 | return MATCH_ERROR; | |
2740 | } | |
2741 | ||
f6d0e37a | 2742 | |
d67fc9ae | 2743 | match |
2744 | gfc_match_import (void) | |
2745 | { | |
2746 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2747 | match m; | |
2748 | gfc_symbol *sym; | |
2749 | gfc_symtree *st; | |
2750 | ||
f6d0e37a | 2751 | if (gfc_current_ns->proc_name == NULL |
2752 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
d67fc9ae | 2753 | { |
2754 | gfc_error ("IMPORT statement at %C only permitted in " | |
2755 | "an INTERFACE body"); | |
2756 | return MATCH_ERROR; | |
2757 | } | |
2758 | ||
1a9745d2 | 2759 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
d67fc9ae | 2760 | == FAILURE) |
2761 | return MATCH_ERROR; | |
2762 | ||
2763 | if (gfc_match_eos () == MATCH_YES) | |
2764 | { | |
2765 | /* All host variables should be imported. */ | |
2766 | gfc_current_ns->has_import_set = 1; | |
2767 | return MATCH_YES; | |
2768 | } | |
2769 | ||
2770 | if (gfc_match (" ::") == MATCH_YES) | |
2771 | { | |
2772 | if (gfc_match_eos () == MATCH_YES) | |
1a9745d2 | 2773 | { |
2774 | gfc_error ("Expecting list of named entities at %C"); | |
2775 | return MATCH_ERROR; | |
2776 | } | |
d67fc9ae | 2777 | } |
2778 | ||
2779 | for(;;) | |
2780 | { | |
2781 | m = gfc_match (" %n", name); | |
2782 | switch (m) | |
2783 | { | |
2784 | case MATCH_YES: | |
096d4ad9 | 2785 | if (gfc_current_ns->parent != NULL |
f6d0e37a | 2786 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
096d4ad9 | 2787 | { |
2788 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2789 | return MATCH_ERROR; | |
2790 | } | |
2791 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
f6d0e37a | 2792 | && gfc_find_symbol (name, |
2793 | gfc_current_ns->proc_name->ns->parent, | |
2794 | 1, &sym)) | |
1a9745d2 | 2795 | { |
2796 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2797 | return MATCH_ERROR; | |
2798 | } | |
2799 | ||
2800 | if (sym == NULL) | |
2801 | { | |
2802 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2803 | "at %C - does not exist.", name); | |
2804 | return MATCH_ERROR; | |
2805 | } | |
2806 | ||
e14bee04 | 2807 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) |
1a9745d2 | 2808 | { |
2809 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2810 | "at %C.", name); | |
2811 | goto next_item; | |
2812 | } | |
2813 | ||
a15d1caf | 2814 | st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name); |
1a9745d2 | 2815 | st->n.sym = sym; |
2816 | sym->refs++; | |
c723595c | 2817 | sym->attr.imported = 1; |
d67fc9ae | 2818 | |
2819 | goto next_item; | |
2820 | ||
2821 | case MATCH_NO: | |
2822 | break; | |
2823 | ||
2824 | case MATCH_ERROR: | |
2825 | return MATCH_ERROR; | |
2826 | } | |
2827 | ||
2828 | next_item: | |
2829 | if (gfc_match_eos () == MATCH_YES) | |
2830 | break; | |
2831 | if (gfc_match_char (',') != MATCH_YES) | |
2832 | goto syntax; | |
2833 | } | |
2834 | ||
2835 | return MATCH_YES; | |
2836 | ||
2837 | syntax: | |
2838 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2839 | return MATCH_ERROR; | |
2840 | } | |
39351103 | 2841 | |
f6d0e37a | 2842 | |
c72e5f7e | 2843 | /* A minimal implementation of gfc_match without whitespace, escape |
2844 | characters or variable arguments. Returns true if the next | |
2845 | characters match the TARGET template exactly. */ | |
2846 | ||
2847 | static bool | |
2848 | match_string_p (const char *target) | |
2849 | { | |
2850 | const char *p; | |
2851 | ||
2852 | for (p = target; *p; p++) | |
e0be6f02 | 2853 | if ((char) gfc_next_ascii_char () != *p) |
c72e5f7e | 2854 | return false; |
2855 | return true; | |
2856 | } | |
2857 | ||
4ee9c684 | 2858 | /* Matches an attribute specification including array specs. If |
2859 | successful, leaves the variables current_attr and current_as | |
2860 | holding the specification. Also sets the colon_seen variable for | |
2861 | later use by matchers associated with initializations. | |
2862 | ||
2863 | This subroutine is a little tricky in the sense that we don't know | |
2864 | if we really have an attr-spec until we hit the double colon. | |
2865 | Until that time, we can only return MATCH_NO. This forces us to | |
2866 | check for duplicate specification at this level. */ | |
2867 | ||
2868 | static match | |
2869 | match_attr_spec (void) | |
2870 | { | |
4ee9c684 | 2871 | /* Modifiers that can exist in a type statement. */ |
2872 | typedef enum | |
2873 | { GFC_DECL_BEGIN = 0, | |
2874 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
2875 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
3ea52af3 | 2876 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
2877 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
aff518b0 | 2878 | DECL_IS_BIND_C, DECL_CODIMENSION, DECL_ASYNCHRONOUS, DECL_NONE, |
4ee9c684 | 2879 | GFC_DECL_END /* Sentinel */ |
2880 | } | |
2881 | decl_types; | |
2882 | ||
2883 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
2884 | #define NUM_DECL GFC_DECL_END | |
2885 | ||
4ee9c684 | 2886 | locus start, seen_at[NUM_DECL]; |
2887 | int seen[NUM_DECL]; | |
9f1b7d17 | 2888 | unsigned int d; |
4ee9c684 | 2889 | const char *attr; |
2890 | match m; | |
f6bb8f4b | 2891 | gfc_try t; |
4ee9c684 | 2892 | |
2893 | gfc_clear_attr (¤t_attr); | |
cbb9e6aa | 2894 | start = gfc_current_locus; |
4ee9c684 | 2895 | |
2896 | current_as = NULL; | |
2897 | colon_seen = 0; | |
2898 | ||
2899 | /* See if we get all of the keywords up to the final double colon. */ | |
2900 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2901 | seen[d] = 0; | |
2902 | ||
2903 | for (;;) | |
2904 | { | |
e0be6f02 | 2905 | char ch; |
c5d33754 | 2906 | |
c72e5f7e | 2907 | d = DECL_NONE; |
2908 | gfc_gobble_whitespace (); | |
2909 | ||
e0be6f02 | 2910 | ch = gfc_next_ascii_char (); |
c72e5f7e | 2911 | if (ch == ':') |
2912 | { | |
2913 | /* This is the successful exit condition for the loop. */ | |
e0be6f02 | 2914 | if (gfc_next_ascii_char () == ':') |
c72e5f7e | 2915 | break; |
2916 | } | |
2917 | else if (ch == ',') | |
c5d33754 | 2918 | { |
c5d33754 | 2919 | gfc_gobble_whitespace (); |
e0be6f02 | 2920 | switch (gfc_peek_ascii_char ()) |
c5d33754 | 2921 | { |
c72e5f7e | 2922 | case 'a': |
738928be | 2923 | gfc_next_ascii_char (); |
2924 | switch (gfc_next_ascii_char ()) | |
2925 | { | |
2926 | case 'l': | |
2927 | if (match_string_p ("locatable")) | |
2928 | { | |
2929 | /* Matched "allocatable". */ | |
2930 | d = DECL_ALLOCATABLE; | |
2931 | } | |
2932 | break; | |
2933 | ||
2934 | case 's': | |
2935 | if (match_string_p ("ynchronous")) | |
2936 | { | |
2937 | /* Matched "asynchronous". */ | |
2938 | d = DECL_ASYNCHRONOUS; | |
2939 | } | |
2940 | break; | |
2941 | } | |
c72e5f7e | 2942 | |
2943 | case 'b': | |
c5d33754 | 2944 | /* Try and match the bind(c). */ |
75ae7f6c | 2945 | m = gfc_match_bind_c (NULL, true); |
5cf92482 | 2946 | if (m == MATCH_YES) |
c5d33754 | 2947 | d = DECL_IS_BIND_C; |
5cf92482 | 2948 | else if (m == MATCH_ERROR) |
2949 | goto cleanup; | |
c72e5f7e | 2950 | break; |
2951 | ||
aff518b0 | 2952 | case 'c': |
2953 | if (match_string_p ("codimension")) | |
2954 | d = DECL_CODIMENSION; | |
2955 | break; | |
2956 | ||
c72e5f7e | 2957 | case 'd': |
2958 | if (match_string_p ("dimension")) | |
2959 | d = DECL_DIMENSION; | |
2960 | break; | |
2961 | ||
2962 | case 'e': | |
2963 | if (match_string_p ("external")) | |
2964 | d = DECL_EXTERNAL; | |
2965 | break; | |
2966 | ||
2967 | case 'i': | |
2968 | if (match_string_p ("int")) | |
2969 | { | |
e0be6f02 | 2970 | ch = gfc_next_ascii_char (); |
c72e5f7e | 2971 | if (ch == 'e') |
2972 | { | |
2973 | if (match_string_p ("nt")) | |
2974 | { | |
2975 | /* Matched "intent". */ | |
2976 | /* TODO: Call match_intent_spec from here. */ | |
2977 | if (gfc_match (" ( in out )") == MATCH_YES) | |
2978 | d = DECL_INOUT; | |
2979 | else if (gfc_match (" ( in )") == MATCH_YES) | |
2980 | d = DECL_IN; | |
2981 | else if (gfc_match (" ( out )") == MATCH_YES) | |
2982 | d = DECL_OUT; | |
2983 | } | |
2984 | } | |
2985 | else if (ch == 'r') | |
2986 | { | |
2987 | if (match_string_p ("insic")) | |
2988 | { | |
2989 | /* Matched "intrinsic". */ | |
2990 | d = DECL_INTRINSIC; | |
2991 | } | |
2992 | } | |
2993 | } | |
2994 | break; | |
2995 | ||
2996 | case 'o': | |
2997 | if (match_string_p ("optional")) | |
2998 | d = DECL_OPTIONAL; | |
2999 | break; | |
3000 | ||
3001 | case 'p': | |
e0be6f02 | 3002 | gfc_next_ascii_char (); |
3003 | switch (gfc_next_ascii_char ()) | |
c72e5f7e | 3004 | { |
3005 | case 'a': | |
3006 | if (match_string_p ("rameter")) | |
3007 | { | |
3008 | /* Matched "parameter". */ | |
3009 | d = DECL_PARAMETER; | |
3010 | } | |
3011 | break; | |
3012 | ||
3013 | case 'o': | |
3014 | if (match_string_p ("inter")) | |
3015 | { | |
3016 | /* Matched "pointer". */ | |
3017 | d = DECL_POINTER; | |
3018 | } | |
3019 | break; | |
3020 | ||
3021 | case 'r': | |
e0be6f02 | 3022 | ch = gfc_next_ascii_char (); |
c72e5f7e | 3023 | if (ch == 'i') |
3024 | { | |
3025 | if (match_string_p ("vate")) | |
3026 | { | |
3027 | /* Matched "private". */ | |
3028 | d = DECL_PRIVATE; | |
3029 | } | |
3030 | } | |
3031 | else if (ch == 'o') | |
3032 | { | |
3033 | if (match_string_p ("tected")) | |
3034 | { | |
3035 | /* Matched "protected". */ | |
3036 | d = DECL_PROTECTED; | |
3037 | } | |
3038 | } | |
3039 | break; | |
3040 | ||
3041 | case 'u': | |
3042 | if (match_string_p ("blic")) | |
3043 | { | |
3044 | /* Matched "public". */ | |
3045 | d = DECL_PUBLIC; | |
3046 | } | |
3047 | break; | |
3048 | } | |
3049 | break; | |
3050 | ||
3051 | case 's': | |
3052 | if (match_string_p ("save")) | |
3053 | d = DECL_SAVE; | |
3054 | break; | |
3055 | ||
3056 | case 't': | |
3057 | if (match_string_p ("target")) | |
3058 | d = DECL_TARGET; | |
3059 | break; | |
3060 | ||
3061 | case 'v': | |
e0be6f02 | 3062 | gfc_next_ascii_char (); |
3063 | ch = gfc_next_ascii_char (); | |
c72e5f7e | 3064 | if (ch == 'a') |
3065 | { | |
3066 | if (match_string_p ("lue")) | |
3067 | { | |
3068 | /* Matched "value". */ | |
3069 | d = DECL_VALUE; | |
3070 | } | |
3071 | } | |
3072 | else if (ch == 'o') | |
3073 | { | |
3074 | if (match_string_p ("latile")) | |
3075 | { | |
3076 | /* Matched "volatile". */ | |
3077 | d = DECL_VOLATILE; | |
3078 | } | |
3079 | } | |
3080 | break; | |
c5d33754 | 3081 | } |
3082 | } | |
f3f9b222 | 3083 | |
c72e5f7e | 3084 | /* No double colon and no recognizable decl_type, so assume that |
3085 | we've been looking at something else the whole time. */ | |
3086 | if (d == DECL_NONE) | |
3087 | { | |
3088 | m = MATCH_NO; | |
3089 | goto cleanup; | |
3090 | } | |
e14bee04 | 3091 | |
7e221851 | 3092 | /* Check to make sure any parens are paired up correctly. */ |
3093 | if (gfc_match_parens () == MATCH_ERROR) | |
3094 | { | |
3095 | m = MATCH_ERROR; | |
3096 | goto cleanup; | |
3097 | } | |
3098 | ||
4ee9c684 | 3099 | seen[d]++; |
cbb9e6aa | 3100 | seen_at[d] = gfc_current_locus; |
4ee9c684 | 3101 | |
e97ac7c0 | 3102 | if (d == DECL_DIMENSION || d == DECL_CODIMENSION) |
4ee9c684 | 3103 | { |
e97ac7c0 | 3104 | gfc_array_spec *as = NULL; |
4ee9c684 | 3105 | |
e97ac7c0 | 3106 | m = gfc_match_array_spec (&as, d == DECL_DIMENSION, |
3107 | d == DECL_CODIMENSION); | |
3108 | ||
3109 | if (current_as == NULL) | |
3110 | current_as = as; | |
3111 | else if (m == MATCH_YES) | |
4ee9c684 | 3112 | { |
e97ac7c0 | 3113 | merge_array_spec (as, current_as, false); |
3114 | gfc_free (as); | |
4ee9c684 | 3115 | } |
3116 | ||
aff518b0 | 3117 | if (m == MATCH_NO) |
3118 | { | |
e97ac7c0 | 3119 | if (d == DECL_CODIMENSION) |
3120 | gfc_error ("Missing codimension specification at %C"); | |
3121 | else | |
3122 | gfc_error ("Missing dimension specification at %C"); | |
aff518b0 | 3123 | m = MATCH_ERROR; |
3124 | } | |
3125 | ||
3126 | if (m == MATCH_ERROR) | |
3127 | goto cleanup; | |
3128 | } | |
4ee9c684 | 3129 | } |
3130 | ||
4ee9c684 | 3131 | /* Since we've seen a double colon, we have to be looking at an |
3132 | attr-spec. This means that we can now issue errors. */ | |
3133 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3134 | if (seen[d] > 1) | |
3135 | { | |
3136 | switch (d) | |
3137 | { | |
3138 | case DECL_ALLOCATABLE: | |
3139 | attr = "ALLOCATABLE"; | |
3140 | break; | |
738928be | 3141 | case DECL_ASYNCHRONOUS: |
3142 | attr = "ASYNCHRONOUS"; | |
3143 | break; | |
aff518b0 | 3144 | case DECL_CODIMENSION: |
3145 | attr = "CODIMENSION"; | |
3146 | break; | |
4ee9c684 | 3147 | case DECL_DIMENSION: |
3148 | attr = "DIMENSION"; | |
3149 | break; | |
3150 | case DECL_EXTERNAL: | |
3151 | attr = "EXTERNAL"; | |
3152 | break; | |
3153 | case DECL_IN: | |
3154 | attr = "INTENT (IN)"; | |
3155 | break; | |
3156 | case DECL_OUT: | |
3157 | attr = "INTENT (OUT)"; | |
3158 | break; | |
3159 | case DECL_INOUT: | |
3160 | attr = "INTENT (IN OUT)"; | |
3161 | break; | |
3162 | case DECL_INTRINSIC: | |
3163 | attr = "INTRINSIC"; | |
3164 | break; | |
3165 | case DECL_OPTIONAL: | |
3166 | attr = "OPTIONAL"; | |
3167 | break; | |
3168 | case DECL_PARAMETER: | |
3169 | attr = "PARAMETER"; | |
3170 | break; | |
3171 | case DECL_POINTER: | |
3172 | attr = "POINTER"; | |
3173 | break; | |
3ea52af3 | 3174 | case DECL_PROTECTED: |
3175 | attr = "PROTECTED"; | |
3176 | break; | |
4ee9c684 | 3177 | case DECL_PRIVATE: |
3178 | attr = "PRIVATE"; | |
3179 | break; | |
3180 | case DECL_PUBLIC: | |
3181 | attr = "PUBLIC"; | |
3182 | break; | |
3183 | case DECL_SAVE: | |
3184 | attr = "SAVE"; | |
3185 | break; | |
3186 | case DECL_TARGET: | |
3187 | attr = "TARGET"; | |
3188 | break; | |
c5d33754 | 3189 | case DECL_IS_BIND_C: |
3190 | attr = "IS_BIND_C"; | |
3191 | break; | |
3192 | case DECL_VALUE: | |
3193 | attr = "VALUE"; | |
3194 | break; | |
ef814c81 | 3195 | case DECL_VOLATILE: |
3196 | attr = "VOLATILE"; | |
3197 | break; | |
4ee9c684 | 3198 | default: |
f6d0e37a | 3199 | attr = NULL; /* This shouldn't happen. */ |
4ee9c684 | 3200 | } |
3201 | ||
3202 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
3203 | m = MATCH_ERROR; | |
3204 | goto cleanup; | |
3205 | } | |
3206 | ||
3207 | /* Now that we've dealt with duplicate attributes, add the attributes | |
3208 | to the current attribute. */ | |
3209 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3210 | { | |
3211 | if (seen[d] == 0) | |
3212 | continue; | |
3213 | ||
3214 | if (gfc_current_state () == COMP_DERIVED | |
aff518b0 | 3215 | && d != DECL_DIMENSION && d != DECL_CODIMENSION |
3216 | && d != DECL_POINTER && d != DECL_PRIVATE | |
3217 | && d != DECL_PUBLIC && d != DECL_NONE) | |
4ee9c684 | 3218 | { |
2294b616 | 3219 | if (d == DECL_ALLOCATABLE) |
3220 | { | |
1a9745d2 | 3221 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
3222 | "attribute at %C in a TYPE definition") | |
e14bee04 | 3223 | == FAILURE) |
2294b616 | 3224 | { |
3225 | m = MATCH_ERROR; | |
3226 | goto cleanup; | |
3227 | } | |
1a9745d2 | 3228 | } |
3229 | else | |
2294b616 | 3230 | { |
3231 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
e14bee04 | 3232 | &seen_at[d]); |
2294b616 | 3233 | m = MATCH_ERROR; |
3234 | goto cleanup; | |
3235 | } | |
4ee9c684 | 3236 | } |
3237 | ||
ea13b9b7 | 3238 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
1a9745d2 | 3239 | && gfc_current_state () != COMP_MODULE) |
ea13b9b7 | 3240 | { |
3241 | if (d == DECL_PRIVATE) | |
3242 | attr = "PRIVATE"; | |
3243 | else | |
3244 | attr = "PUBLIC"; | |
e14bee04 | 3245 | if (gfc_current_state () == COMP_DERIVED |
3246 | && gfc_state_stack->previous | |
3247 | && gfc_state_stack->previous->state == COMP_MODULE) | |
3248 | { | |
3249 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s " | |
3250 | "at %L in a TYPE definition", attr, | |
3251 | &seen_at[d]) | |
3252 | == FAILURE) | |
3253 | { | |
3254 | m = MATCH_ERROR; | |
3255 | goto cleanup; | |
3256 | } | |
3257 | } | |
3258 | else | |
3259 | { | |
3260 | gfc_error ("%s attribute at %L is not allowed outside of the " | |
3261 | "specification part of a module", attr, &seen_at[d]); | |
3262 | m = MATCH_ERROR; | |
3263 | goto cleanup; | |
3264 | } | |
ea13b9b7 | 3265 | } |
3266 | ||
4ee9c684 | 3267 | switch (d) |
3268 | { | |
3269 | case DECL_ALLOCATABLE: | |
3270 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
3271 | break; | |
3272 | ||
738928be | 3273 | case DECL_ASYNCHRONOUS: |
3274 | if (gfc_notify_std (GFC_STD_F2003, | |
3275 | "Fortran 2003: ASYNCHRONOUS attribute at %C") | |
3276 | == FAILURE) | |
3277 | t = FAILURE; | |
3278 | else | |
3279 | t = gfc_add_asynchronous (¤t_attr, NULL, &seen_at[d]); | |
3280 | break; | |
3281 | ||
aff518b0 | 3282 | case DECL_CODIMENSION: |
3283 | t = gfc_add_codimension (¤t_attr, NULL, &seen_at[d]); | |
3284 | break; | |
3285 | ||
4ee9c684 | 3286 | case DECL_DIMENSION: |
950683ed | 3287 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 3288 | break; |
3289 | ||
3290 | case DECL_EXTERNAL: | |
3291 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
3292 | break; | |
3293 | ||
3294 | case DECL_IN: | |
3295 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
3296 | break; | |
3297 | ||
3298 | case DECL_OUT: | |
3299 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
3300 | break; | |
3301 | ||
3302 | case DECL_INOUT: | |
3303 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
3304 | break; | |
3305 | ||
3306 | case DECL_INTRINSIC: | |
3307 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
3308 | break; | |
3309 | ||
3310 | case DECL_OPTIONAL: | |
3311 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
3312 | break; | |
3313 | ||
3314 | case DECL_PARAMETER: | |
950683ed | 3315 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
4ee9c684 | 3316 | break; |
3317 | ||
3318 | case DECL_POINTER: | |
3319 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
3320 | break; | |
3321 | ||
3ea52af3 | 3322 | case DECL_PROTECTED: |
3323 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
3324 | { | |
3325 | gfc_error ("PROTECTED at %C only allowed in specification " | |
3326 | "part of a module"); | |
3327 | t = FAILURE; | |
3328 | break; | |
3329 | } | |
3330 | ||
1a9745d2 | 3331 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
3332 | "attribute at %C") | |
3ea52af3 | 3333 | == FAILURE) |
3334 | t = FAILURE; | |
3335 | else | |
3336 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
3337 | break; | |
3338 | ||
4ee9c684 | 3339 | case DECL_PRIVATE: |
950683ed | 3340 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
3341 | &seen_at[d]); | |
4ee9c684 | 3342 | break; |
3343 | ||
3344 | case DECL_PUBLIC: | |
950683ed | 3345 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
3346 | &seen_at[d]); | |
4ee9c684 | 3347 | break; |
3348 | ||
3349 | case DECL_SAVE: | |
950683ed | 3350 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
4ee9c684 | 3351 | break; |
3352 | ||
3353 | case DECL_TARGET: | |
3354 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
3355 | break; | |
3356 | ||
c5d33754 | 3357 | case DECL_IS_BIND_C: |
3358 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); | |
3359 | break; | |
3360 | ||
8f6339b6 | 3361 | case DECL_VALUE: |
1a9745d2 | 3362 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
3363 | "at %C") | |
8f6339b6 | 3364 | == FAILURE) |
3365 | t = FAILURE; | |
3366 | else | |
3367 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
3368 | break; | |
3369 | ||
ef814c81 | 3370 | case DECL_VOLATILE: |
3371 | if (gfc_notify_std (GFC_STD_F2003, | |
1a9745d2 | 3372 | "Fortran 2003: VOLATILE attribute at %C") |
ef814c81 | 3373 | == FAILURE) |
3374 | t = FAILURE; | |
3375 | else | |
3376 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
3377 | break; | |
3378 | ||
4ee9c684 | 3379 | default: |
3380 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
3381 | } | |
3382 | ||
3383 | if (t == FAILURE) | |
3384 | { | |
3385 | m = MATCH_ERROR; | |
3386 | goto cleanup; | |
3387 | } | |
3388 | } | |
3389 | ||
3390 | colon_seen = 1; | |
3391 | return MATCH_YES; | |
3392 | ||
3393 | cleanup: | |
cbb9e6aa | 3394 | gfc_current_locus = start; |
4ee9c684 | 3395 | gfc_free_array_spec (current_as); |
3396 | current_as = NULL; | |
3397 | return m; | |
3398 | } | |
3399 | ||
3400 | ||
c5d33754 | 3401 | /* Set the binding label, dest_label, either with the binding label |
3402 | stored in the given gfc_typespec, ts, or if none was provided, it | |
3403 | will be the symbol name in all lower case, as required by the draft | |
3404 | (J3/04-007, section 15.4.1). If a binding label was given and | |
3405 | there is more than one argument (num_idents), it is an error. */ | |
3406 | ||
f6bb8f4b | 3407 | gfc_try |
c5d33754 | 3408 | set_binding_label (char *dest_label, const char *sym_name, int num_idents) |
3409 | { | |
825718f9 | 3410 | if (num_idents > 1 && has_name_equals) |
c5d33754 | 3411 | { |
825718f9 | 3412 | gfc_error ("Multiple identifiers provided with " |
3413 | "single NAME= specifier at %C"); | |
3414 | return FAILURE; | |
3415 | } | |
c5d33754 | 3416 | |
825718f9 | 3417 | if (curr_binding_label[0] != '\0') |
3418 | { | |
c5d33754 | 3419 | /* Binding label given; store in temp holder til have sym. */ |
b1223b39 | 3420 | strcpy (dest_label, curr_binding_label); |
c5d33754 | 3421 | } |
3422 | else | |
3423 | { | |
3424 | /* No binding label given, and the NAME= specifier did not exist, | |
3425 | which means there was no NAME="". */ | |
3426 | if (sym_name != NULL && has_name_equals == 0) | |
b1223b39 | 3427 | strcpy (dest_label, sym_name); |
c5d33754 | 3428 | } |
3429 | ||
3430 | return SUCCESS; | |
3431 | } | |
3432 | ||
3433 | ||
3434 | /* Set the status of the given common block as being BIND(C) or not, | |
3435 | depending on the given parameter, is_bind_c. */ | |
3436 | ||
3437 | void | |
3438 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) | |
3439 | { | |
3440 | com_block->is_bind_c = is_bind_c; | |
3441 | return; | |
3442 | } | |
3443 | ||
3444 | ||
3445 | /* Verify that the given gfc_typespec is for a C interoperable type. */ | |
3446 | ||
f6bb8f4b | 3447 | gfc_try |
209d3778 | 3448 | verify_c_interop (gfc_typespec *ts) |
c5d33754 | 3449 | { |
eeebe20b | 3450 | if (ts->type == BT_DERIVED && ts->u.derived != NULL) |
3451 | return (ts->u.derived->ts.is_c_interop ? SUCCESS : FAILURE); | |
c5d33754 | 3452 | else if (ts->is_c_interop != 1) |
3453 | return FAILURE; | |
3454 | ||
3455 | return SUCCESS; | |
3456 | } | |
3457 | ||
3458 | ||
3459 | /* Verify that the variables of a given common block, which has been | |
3460 | defined with the attribute specifier bind(c), to be of a C | |
3461 | interoperable type. Errors will be reported here, if | |
3462 | encountered. */ | |
3463 | ||
f6bb8f4b | 3464 | gfc_try |
c5d33754 | 3465 | verify_com_block_vars_c_interop (gfc_common_head *com_block) |
3466 | { | |
3467 | gfc_symbol *curr_sym = NULL; | |
f6bb8f4b | 3468 | gfc_try retval = SUCCESS; |
c5d33754 | 3469 | |
3470 | curr_sym = com_block->head; | |
3471 | ||
3472 | /* Make sure we have at least one symbol. */ | |
3473 | if (curr_sym == NULL) | |
3474 | return retval; | |
3475 | ||
3476 | /* Here we know we have a symbol, so we'll execute this loop | |
3477 | at least once. */ | |
3478 | do | |
3479 | { | |
3480 | /* The second to last param, 1, says this is in a common block. */ | |
3481 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); | |
3482 | curr_sym = curr_sym->common_next; | |
3483 | } while (curr_sym != NULL); | |
3484 | ||
3485 | return retval; | |
3486 | } | |
3487 | ||
3488 | ||
3489 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, | |
3490 | an appropriate error message is reported. */ | |
3491 | ||
f6bb8f4b | 3492 | gfc_try |
c5d33754 | 3493 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, |
3494 | int is_in_common, gfc_common_head *com_block) | |
3495 | { | |
1f2ab120 | 3496 | bool bind_c_function = false; |
f6bb8f4b | 3497 | gfc_try retval = SUCCESS; |
4f7bb9ec | 3498 | |
1f2ab120 | 3499 | if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c) |
3500 | bind_c_function = true; | |
3501 | ||
4f7bb9ec | 3502 | if (tmp_sym->attr.function && tmp_sym->result != NULL) |
3503 | { | |
3504 | tmp_sym = tmp_sym->result; | |
3505 | /* Make sure it wasn't an implicitly typed result. */ | |
3506 | if (tmp_sym->attr.implicit_type) | |
3507 | { | |
3508 | gfc_warning ("Implicitly declared BIND(C) function '%s' at " | |
3509 | "%L may not be C interoperable", tmp_sym->name, | |
3510 | &tmp_sym->declared_at); | |
3511 | tmp_sym->ts.f90_type = tmp_sym->ts.type; | |
3512 | /* Mark it as C interoperable to prevent duplicate warnings. */ | |
3513 | tmp_sym->ts.is_c_interop = 1; | |
3514 | tmp_sym->attr.is_c_interop = 1; | |
3515 | } | |
3516 | } | |
1f2ab120 | 3517 | |
c5d33754 | 3518 | /* Here, we know we have the bind(c) attribute, so if we have |
3519 | enough type info, then verify that it's a C interop kind. | |
3520 | The info could be in the symbol already, or possibly still in | |
3521 | the given ts (current_ts), so look in both. */ | |
3522 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) | |
3523 | { | |
209d3778 | 3524 | if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS) |
c5d33754 | 3525 | { |
3526 | /* See if we're dealing with a sym in a common block or not. */ | |
3527 | if (is_in_common == 1) | |
3528 | { | |
3529 | gfc_warning ("Variable '%s' in common block '%s' at %L " | |
3530 | "may not be a C interoperable " | |
3531 | "kind though common block '%s' is BIND(C)", | |
3532 | tmp_sym->name, com_block->name, | |
3533 | &(tmp_sym->declared_at), com_block->name); | |
3534 | } | |
3535 | else | |
3536 | { | |
3537 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) | |
3538 | gfc_error ("Type declaration '%s' at %L is not C " | |
3539 | "interoperable but it is BIND(C)", | |
3540 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3541 | else | |
3542 | gfc_warning ("Variable '%s' at %L " | |
3543 | "may not be a C interoperable " | |
3544 | "kind but it is bind(c)", | |
3545 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3546 | } | |
3547 | } | |
3548 | ||
3549 | /* Variables declared w/in a common block can't be bind(c) | |
3550 | since there's no way for C to see these variables, so there's | |
3551 | semantically no reason for the attribute. */ | |
3552 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) | |
3553 | { | |
3554 | gfc_error ("Variable '%s' in common block '%s' at " | |
3555 | "%L cannot be declared with BIND(C) " | |
3556 | "since it is not a global", | |
3557 | tmp_sym->name, com_block->name, | |
3558 | &(tmp_sym->declared_at)); | |
3559 | retval = FAILURE; | |
3560 | } | |
3561 | ||
3562 | /* Scalar variables that are bind(c) can not have the pointer | |
3563 | or allocatable attributes. */ | |
3564 | if (tmp_sym->attr.is_bind_c == 1) | |
3565 | { | |
3566 | if (tmp_sym->attr.pointer == 1) | |
3567 | { | |
3568 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3569 | "POINTER and BIND(C) attributes", | |
3570 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3571 | retval = FAILURE; | |
3572 | } | |
3573 | ||
3574 | if (tmp_sym->attr.allocatable == 1) | |
3575 | { | |
3576 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3577 | "ALLOCATABLE and BIND(C) attributes", | |
3578 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3579 | retval = FAILURE; | |
3580 | } | |
3581 | ||
1f2ab120 | 3582 | } |
3583 | ||
3584 | /* If it is a BIND(C) function, make sure the return value is a | |
3585 | scalar value. The previous tests in this function made sure | |
3586 | the type is interoperable. */ | |
3587 | if (bind_c_function && tmp_sym->as != NULL) | |
3588 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3589 | "be an array", tmp_sym->name, &(tmp_sym->declared_at)); | |
3590 | ||
3591 | /* BIND(C) functions can not return a character string. */ | |
3592 | if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER) | |
eeebe20b | 3593 | if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL |
3594 | || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT | |
3595 | || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0) | |
1f2ab120 | 3596 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " |
c5d33754 | 3597 | "be a character string", tmp_sym->name, |
3598 | &(tmp_sym->declared_at)); | |
c5d33754 | 3599 | } |
3600 | ||
3601 | /* See if the symbol has been marked as private. If it has, make sure | |
3602 | there is no binding label and warn the user if there is one. */ | |
3603 | if (tmp_sym->attr.access == ACCESS_PRIVATE | |
3604 | && tmp_sym->binding_label[0] != '\0') | |
3605 | /* Use gfc_warning_now because we won't say that the symbol fails | |
3606 | just because of this. */ | |
3607 | gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " | |
3608 | "given the binding label '%s'", tmp_sym->name, | |
3609 | &(tmp_sym->declared_at), tmp_sym->binding_label); | |
3610 | ||
3611 | return retval; | |
3612 | } | |
3613 | ||
3614 | ||
3615 | /* Set the appropriate fields for a symbol that's been declared as | |
3616 | BIND(C) (the is_bind_c flag and the binding label), and verify that | |
3617 | the type is C interoperable. Errors are reported by the functions | |
3618 | used to set/test these fields. */ | |
3619 | ||
f6bb8f4b | 3620 | gfc_try |
c5d33754 | 3621 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) |
3622 | { | |
f6bb8f4b | 3623 | gfc_try retval = SUCCESS; |
c5d33754 | 3624 | |
3625 | /* TODO: Do we need to make sure the vars aren't marked private? */ | |
3626 | ||
3627 | /* Set the is_bind_c bit in symbol_attribute. */ | |
3628 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); | |
3629 | ||
3630 | if (set_binding_label (tmp_sym->binding_label, tmp_sym->name, | |
3631 | num_idents) != SUCCESS) | |
3632 | return FAILURE; | |
3633 | ||
3634 | return retval; | |
3635 | } | |
3636 | ||
3637 | ||
3638 | /* Set the fields marking the given common block as BIND(C), including | |
3639 | a binding label, and report any errors encountered. */ | |
3640 | ||
f6bb8f4b | 3641 | gfc_try |
c5d33754 | 3642 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) |
3643 | { | |
f6bb8f4b | 3644 | gfc_try retval = SUCCESS; |
c5d33754 | 3645 | |
3646 | /* destLabel, common name, typespec (which may have binding label). */ | |
3647 | if (set_binding_label (com_block->binding_label, com_block->name, num_idents) | |
3648 | != SUCCESS) | |
3649 | return FAILURE; | |
3650 | ||
3651 | /* Set the given common block (com_block) to being bind(c) (1). */ | |
3652 | set_com_block_bind_c (com_block, 1); | |
3653 | ||
3654 | return retval; | |
3655 | } | |
3656 | ||
3657 | ||
3658 | /* Retrieve the list of one or more identifiers that the given bind(c) | |
3659 | attribute applies to. */ | |
3660 | ||
f6bb8f4b | 3661 | gfc_try |
c5d33754 | 3662 | get_bind_c_idents (void) |
3663 | { | |
3664 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3665 | int num_idents = 0; | |
3666 | gfc_symbol *tmp_sym = NULL; | |
3667 | match found_id; | |
3668 | gfc_common_head *com_block = NULL; | |
3669 | ||
3670 | if (gfc_match_name (name) == MATCH_YES) | |
3671 | { | |
3672 | found_id = MATCH_YES; | |
3673 | gfc_get_ha_symbol (name, &tmp_sym); | |
3674 | } | |
3675 | else if (match_common_name (name) == MATCH_YES) | |
3676 | { | |
3677 | found_id = MATCH_YES; | |
3678 | com_block = gfc_get_common (name, 0); | |
3679 | } | |
3680 | else | |
3681 | { | |
3682 | gfc_error ("Need either entity or common block name for " | |
3683 | "attribute specification statement at %C"); | |
3684 | return FAILURE; | |
3685 | } | |
3686 | ||
3687 | /* Save the current identifier and look for more. */ | |
3688 | do | |
3689 | { | |
3690 | /* Increment the number of identifiers found for this spec stmt. */ | |
3691 | num_idents++; | |
3692 | ||
3693 | /* Make sure we have a sym or com block, and verify that it can | |
3694 | be bind(c). Set the appropriate field(s) and look for more | |
3695 | identifiers. */ | |
3696 | if (tmp_sym != NULL || com_block != NULL) | |
3697 | { | |
3698 | if (tmp_sym != NULL) | |
3699 | { | |
3700 | if (set_verify_bind_c_sym (tmp_sym, num_idents) | |
3701 | != SUCCESS) | |
3702 | return FAILURE; | |
3703 | } | |
3704 | else | |
3705 | { | |
3706 | if (set_verify_bind_c_com_block(com_block, num_idents) | |
3707 | != SUCCESS) | |
3708 | return FAILURE; | |
3709 | } | |
3710 | ||
3711 | /* Look to see if we have another identifier. */ | |
3712 | tmp_sym = NULL; | |
3713 | if (gfc_match_eos () == MATCH_YES) | |
3714 | found_id = MATCH_NO; | |
3715 | else if (gfc_match_char (',') != MATCH_YES) | |
3716 | found_id = MATCH_NO; | |
3717 | else if (gfc_match_name (name) == MATCH_YES) | |
3718 | { | |
3719 | found_id = MATCH_YES; | |
3720 | gfc_get_ha_symbol (name, &tmp_sym); | |
3721 | } | |
3722 | else if (match_common_name (name) == MATCH_YES) | |
3723 | { | |
3724 | found_id = MATCH_YES; | |
3725 | com_block = gfc_get_common (name, 0); | |
3726 | } | |
3727 | else | |
3728 | { | |
3729 | gfc_error ("Missing entity or common block name for " | |
3730 | "attribute specification statement at %C"); | |
3731 | return FAILURE; | |
3732 | } | |
3733 | } | |
3734 | else | |
3735 | { | |
3736 | gfc_internal_error ("Missing symbol"); | |
3737 | } | |
3738 | } while (found_id == MATCH_YES); | |
3739 | ||
3740 | /* if we get here we were successful */ | |
3741 | return SUCCESS; | |
3742 | } | |
3743 | ||
3744 | ||
3745 | /* Try and match a BIND(C) attribute specification statement. */ | |
3746 | ||
3747 | match | |
3748 | gfc_match_bind_c_stmt (void) | |
3749 | { | |
3750 | match found_match = MATCH_NO; | |
3751 | gfc_typespec *ts; | |
3752 | ||
3753 | ts = ¤t_ts; | |
3754 | ||
3755 | /* This may not be necessary. */ | |
3756 | gfc_clear_ts (ts); | |
3757 | /* Clear the temporary binding label holder. */ | |
3758 | curr_binding_label[0] = '\0'; | |
3759 | ||
3760 | /* Look for the bind(c). */ | |
75ae7f6c | 3761 | found_match = gfc_match_bind_c (NULL, true); |
c5d33754 | 3762 | |
3763 | if (found_match == MATCH_YES) | |
3764 | { | |
3765 | /* Look for the :: now, but it is not required. */ | |
3766 | gfc_match (" :: "); | |
3767 | ||
3768 | /* Get the identifier(s) that needs to be updated. This may need to | |
3769 | change to hand the flag(s) for the attr specified so all identifiers | |
3770 | found can have all appropriate parts updated (assuming that the same | |
3771 | spec stmt can have multiple attrs, such as both bind(c) and | |
3772 | allocatable...). */ | |
3773 | if (get_bind_c_idents () != SUCCESS) | |
3774 | /* Error message should have printed already. */ | |
3775 | return MATCH_ERROR; | |
3776 | } | |
3777 | ||
3778 | return found_match; | |
3779 | } | |
3780 | ||
3781 | ||
4ee9c684 | 3782 | /* Match a data declaration statement. */ |
3783 | ||
3784 | match | |
3785 | gfc_match_data_decl (void) | |
3786 | { | |
3787 | gfc_symbol *sym; | |
3788 | match m; | |
3923b69f | 3789 | int elem; |
4ee9c684 | 3790 | |
c5d33754 | 3791 | num_idents_on_line = 0; |
3792 | ||
e8152f13 | 3793 | m = gfc_match_decl_type_spec (¤t_ts, 0); |
4ee9c684 | 3794 | if (m != MATCH_YES) |
3795 | return m; | |
3796 | ||
b3704193 | 3797 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
3798 | && gfc_current_state () != COMP_DERIVED) | |
4ee9c684 | 3799 | { |
eeebe20b | 3800 | sym = gfc_use_derived (current_ts.u.derived); |
4ee9c684 | 3801 | |
3802 | if (sym == NULL) | |
3803 | { | |
3804 | m = MATCH_ERROR; | |
3805 | goto cleanup; | |
3806 | } | |
3807 | ||
eeebe20b | 3808 | current_ts.u.derived = sym; |
4ee9c684 | 3809 | } |
3810 | ||
3811 | m = match_attr_spec (); | |
3812 | if (m == MATCH_ERROR) | |
3813 | { | |
3814 | m = MATCH_NO; | |
3815 | goto cleanup; | |
3816 | } | |
3817 | ||
b3704193 | 3818 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
3819 | && current_ts.u.derived->components == NULL | |
eeebe20b | 3820 | && !current_ts.u.derived->attr.zero_comp) |
4ee9c684 | 3821 | { |
3822 | ||
3823 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
3824 | goto ok; | |
3825 | ||
eeebe20b | 3826 | gfc_find_symbol (current_ts.u.derived->name, |
3827 | current_ts.u.derived->ns->parent, 1, &sym); | |
4ee9c684 | 3828 | |
40cf8078 | 3829 | /* Any symbol that we find had better be a type definition |
1a9745d2 | 3830 | which has its components defined. */ |
40cf8078 | 3831 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
eeebe20b | 3832 | && (current_ts.u.derived->components != NULL |
3833 | || current_ts.u.derived->attr.zero_comp)) | |
4ee9c684 | 3834 | goto ok; |
3835 | ||
40cf8078 | 3836 | /* Now we have an error, which we signal, and then fix up |
3837 | because the knock-on is plain and simple confusing. */ | |
3838 | gfc_error_now ("Derived type at %C has not been previously defined " | |
1a9745d2 | 3839 | "and so cannot appear in a derived type definition"); |
40cf8078 | 3840 | current_attr.pointer = 1; |
3841 | goto ok; | |
4ee9c684 | 3842 | } |
3843 | ||
3844 | ok: | |
3845 | /* If we have an old-style character declaration, and no new-style | |
3846 | attribute specifications, then there a comma is optional between | |
3847 | the type specification and the variable list. */ | |
3848 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
3849 | gfc_match_char (','); | |
3850 | ||
3923b69f | 3851 | /* Give the types/attributes to symbols that follow. Give the element |
3852 | a number so that repeat character length expressions can be copied. */ | |
3853 | elem = 1; | |
4ee9c684 | 3854 | for (;;) |
3855 | { | |
c5d33754 | 3856 | num_idents_on_line++; |
3923b69f | 3857 | m = variable_decl (elem++); |
4ee9c684 | 3858 | if (m == MATCH_ERROR) |
3859 | goto cleanup; | |
3860 | if (m == MATCH_NO) | |
3861 | break; | |
3862 | ||
3863 | if (gfc_match_eos () == MATCH_YES) | |
3864 | goto cleanup; | |
3865 | if (gfc_match_char (',') != MATCH_YES) | |
3866 | break; | |
3867 | } | |
3868 | ||
8f0bdb23 | 3869 | if (gfc_error_flag_test () == 0) |
3870 | gfc_error ("Syntax error in data declaration at %C"); | |
4ee9c684 | 3871 | m = MATCH_ERROR; |
3872 | ||
af29c1f0 | 3873 | gfc_free_data_all (gfc_current_ns); |
3874 | ||
4ee9c684 | 3875 | cleanup: |
3876 | gfc_free_array_spec (current_as); | |
3877 | current_as = NULL; | |
3878 | return m; | |
3879 | } | |
3880 | ||
3881 | ||
3882 | /* Match a prefix associated with a function or subroutine | |
3883 | declaration. If the typespec pointer is nonnull, then a typespec | |
3884 | can be matched. Note that if nothing matches, MATCH_YES is | |
3885 | returned (the null string was matched). */ | |
3886 | ||
077932f9 | 3887 | match |
3888 | gfc_match_prefix (gfc_typespec *ts) | |
4ee9c684 | 3889 | { |
5b11d932 | 3890 | bool seen_type; |
4ee9c684 | 3891 | |
3892 | gfc_clear_attr (¤t_attr); | |
3893 | seen_type = 0; | |
3894 | ||
d1645c7b | 3895 | gcc_assert (!gfc_matching_prefix); |
3896 | gfc_matching_prefix = true; | |
40de255b | 3897 | |
4ee9c684 | 3898 | loop: |
3899 | if (!seen_type && ts != NULL | |
e8152f13 | 3900 | && gfc_match_decl_type_spec (ts, 0) == MATCH_YES |
4ee9c684 | 3901 | && gfc_match_space () == MATCH_YES) |
3902 | { | |
3903 | ||
3904 | seen_type = 1; | |
3905 | goto loop; | |
3906 | } | |
3907 | ||
3908 | if (gfc_match ("elemental% ") == MATCH_YES) | |
3909 | { | |
3910 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
40de255b | 3911 | goto error; |
4ee9c684 | 3912 | |
3913 | goto loop; | |
3914 | } | |
3915 | ||
3916 | if (gfc_match ("pure% ") == MATCH_YES) | |
3917 | { | |
3918 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
40de255b | 3919 | goto error; |
4ee9c684 | 3920 | |
3921 | goto loop; | |
3922 | } | |
3923 | ||
3924 | if (gfc_match ("recursive% ") == MATCH_YES) | |
3925 | { | |
3926 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
40de255b | 3927 | goto error; |
4ee9c684 | 3928 | |
3929 | goto loop; | |
3930 | } | |
3931 | ||
3932 | /* At this point, the next item is not a prefix. */ | |
d1645c7b | 3933 | gcc_assert (gfc_matching_prefix); |
3934 | gfc_matching_prefix = false; | |
4ee9c684 | 3935 | return MATCH_YES; |
40de255b | 3936 | |
3937 | error: | |
d1645c7b | 3938 | gcc_assert (gfc_matching_prefix); |
3939 | gfc_matching_prefix = false; | |
40de255b | 3940 | return MATCH_ERROR; |
4ee9c684 | 3941 | } |
3942 | ||
3943 | ||
077932f9 | 3944 | /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */ |
4ee9c684 | 3945 | |
f6bb8f4b | 3946 | static gfc_try |
1a9745d2 | 3947 | copy_prefix (symbol_attribute *dest, locus *where) |
4ee9c684 | 3948 | { |
4ee9c684 | 3949 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
3950 | return FAILURE; | |
3951 | ||
3952 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
3953 | return FAILURE; | |
3954 | ||
3955 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
3956 | return FAILURE; | |
3957 | ||
3958 | return SUCCESS; | |
3959 | } | |
3960 | ||
3961 | ||
3962 | /* Match a formal argument list. */ | |
3963 | ||
3964 | match | |
1a9745d2 | 3965 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
4ee9c684 | 3966 | { |
3967 | gfc_formal_arglist *head, *tail, *p, *q; | |
3968 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3969 | gfc_symbol *sym; | |
3970 | match m; | |
3971 | ||
3972 | head = tail = NULL; | |
3973 | ||
3974 | if (gfc_match_char ('(') != MATCH_YES) | |
3975 | { | |
3976 | if (null_flag) | |
3977 | goto ok; | |
3978 | return MATCH_NO; | |
3979 | } | |
3980 | ||
3981 | if (gfc_match_char (')') == MATCH_YES) | |
3982 | goto ok; | |
3983 | ||
3984 | for (;;) | |
3985 | { | |
3986 | if (gfc_match_char ('*') == MATCH_YES) | |
3987 | sym = NULL; | |
3988 | else | |
3989 | { | |
3990 | m = gfc_match_name (name); | |
3991 | if (m != MATCH_YES) | |
3992 | goto cleanup; | |
3993 | ||
3994 | if (gfc_get_symbol (name, NULL, &sym)) | |
3995 | goto cleanup; | |
3996 | } | |
3997 | ||
3998 | p = gfc_get_formal_arglist (); | |
3999 | ||
4000 | if (head == NULL) | |
4001 | head = tail = p; | |
4002 | else | |
4003 | { | |
4004 | tail->next = p; | |
4005 | tail = p; | |
4006 | } | |
4007 | ||
4008 | tail->sym = sym; | |
4009 | ||
4010 | /* We don't add the VARIABLE flavor because the name could be a | |
1a9745d2 | 4011 | dummy procedure. We don't apply these attributes to formal |
4012 | arguments of statement functions. */ | |
4ee9c684 | 4013 | if (sym != NULL && !st_flag |
950683ed | 4014 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
4ee9c684 | 4015 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
4016 | { | |
4017 | m = MATCH_ERROR; | |
4018 | goto cleanup; | |
4019 | } | |
4020 | ||
4021 | /* The name of a program unit can be in a different namespace, | |
1a9745d2 | 4022 | so check for it explicitly. After the statement is accepted, |
4023 | the name is checked for especially in gfc_get_symbol(). */ | |
4ee9c684 | 4024 | if (gfc_new_block != NULL && sym != NULL |
4025 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
4026 | { | |
4027 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
4028 | sym->name); | |
4029 | m = MATCH_ERROR; | |
4030 | goto cleanup; | |
4031 | } | |
4032 | ||
4033 | if (gfc_match_char (')') == MATCH_YES) | |
4034 | goto ok; | |
4035 | ||
4036 | m = gfc_match_char (','); | |
4037 | if (m != MATCH_YES) | |
4038 | { | |
4039 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
4040 | goto cleanup; | |
4041 | } | |
4042 | } | |
4043 | ||
4044 | ok: | |
4045 | /* Check for duplicate symbols in the formal argument list. */ | |
4046 | if (head != NULL) | |
4047 | { | |
4048 | for (p = head; p->next; p = p->next) | |
4049 | { | |
4050 | if (p->sym == NULL) | |
4051 | continue; | |
4052 | ||
4053 | for (q = p->next; q; q = q->next) | |
4054 | if (p->sym == q->sym) | |
4055 | { | |
1a9745d2 | 4056 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
4057 | "at %C", p->sym->name); | |
4ee9c684 | 4058 | |
4059 | m = MATCH_ERROR; | |
4060 | goto cleanup; | |
4061 | } | |
4062 | } | |
4063 | } | |
4064 | ||
f6d0e37a | 4065 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) |
4066 | == FAILURE) | |
4ee9c684 | 4067 | { |
4068 | m = MATCH_ERROR; | |
4069 | goto cleanup; | |
4070 | } | |
4071 | ||
4072 | return MATCH_YES; | |
4073 | ||
4074 | cleanup: | |
4075 | gfc_free_formal_arglist (head); | |
4076 | return m; | |
4077 | } | |
4078 | ||
4079 | ||
4080 | /* Match a RESULT specification following a function declaration or | |
4081 | ENTRY statement. Also matches the end-of-statement. */ | |
4082 | ||
4083 | static match | |
f6d0e37a | 4084 | match_result (gfc_symbol *function, gfc_symbol **result) |
4ee9c684 | 4085 | { |
4086 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4087 | gfc_symbol *r; | |
4088 | match m; | |
4089 | ||
4090 | if (gfc_match (" result (") != MATCH_YES) | |
4091 | return MATCH_NO; | |
4092 | ||
4093 | m = gfc_match_name (name); | |
4094 | if (m != MATCH_YES) | |
4095 | return m; | |
4096 | ||
c5d33754 | 4097 | /* Get the right paren, and that's it because there could be the |
4098 | bind(c) attribute after the result clause. */ | |
4099 | if (gfc_match_char(')') != MATCH_YES) | |
4ee9c684 | 4100 | { |
c5d33754 | 4101 | /* TODO: should report the missing right paren here. */ |
4ee9c684 | 4102 | return MATCH_ERROR; |
4103 | } | |
4104 | ||
4105 | if (strcmp (function->name, name) == 0) | |
4106 | { | |
1a9745d2 | 4107 | gfc_error ("RESULT variable at %C must be different than function name"); |
4ee9c684 | 4108 | return MATCH_ERROR; |
4109 | } | |
4110 | ||
4111 | if (gfc_get_symbol (name, NULL, &r)) | |
4112 | return MATCH_ERROR; | |
4113 | ||
f6d3042b | 4114 | if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE) |
4ee9c684 | 4115 | return MATCH_ERROR; |
4116 | ||
4117 | *result = r; | |
4118 | ||
4119 | return MATCH_YES; | |
4120 | } | |
4121 | ||
4122 | ||
c5d33754 | 4123 | /* Match a function suffix, which could be a combination of a result |
4124 | clause and BIND(C), either one, or neither. The draft does not | |
4125 | require them to come in a specific order. */ | |
4126 | ||
4127 | match | |
4128 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) | |
4129 | { | |
4130 | match is_bind_c; /* Found bind(c). */ | |
4131 | match is_result; /* Found result clause. */ | |
4132 | match found_match; /* Status of whether we've found a good match. */ | |
e0be6f02 | 4133 | char peek_char; /* Character we're going to peek at. */ |
75ae7f6c | 4134 | bool allow_binding_name; |
c5d33754 | 4135 | |
4136 | /* Initialize to having found nothing. */ | |
4137 | found_match = MATCH_NO; | |
4138 | is_bind_c = MATCH_NO; | |
4139 | is_result = MATCH_NO; | |
4140 | ||
4141 | /* Get the next char to narrow between result and bind(c). */ | |
4142 | gfc_gobble_whitespace (); | |
e0be6f02 | 4143 | peek_char = gfc_peek_ascii_char (); |
c5d33754 | 4144 | |
75ae7f6c | 4145 | /* C binding names are not allowed for internal procedures. */ |
4146 | if (gfc_current_state () == COMP_CONTAINS | |
4147 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
4148 | allow_binding_name = false; | |
4149 | else | |
4150 | allow_binding_name = true; | |
4151 | ||
c5d33754 | 4152 | switch (peek_char) |
4153 | { | |
4154 | case 'r': | |
4155 | /* Look for result clause. */ | |
4156 | is_result = match_result (sym, result); | |
4157 | if (is_result == MATCH_YES) | |
4158 | { | |
4159 | /* Now see if there is a bind(c) after it. */ | |
75ae7f6c | 4160 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 4161 | /* We've found the result clause and possibly bind(c). */ |
4162 | found_match = MATCH_YES; | |
4163 | } | |
4164 | else | |
4165 | /* This should only be MATCH_ERROR. */ | |
4166 | found_match = is_result; | |
4167 | break; | |
4168 | case 'b': | |
4169 | /* Look for bind(c) first. */ | |
75ae7f6c | 4170 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 4171 | if (is_bind_c == MATCH_YES) |
4172 | { | |
4173 | /* Now see if a result clause followed it. */ | |
4174 | is_result = match_result (sym, result); | |
4175 | found_match = MATCH_YES; | |
4176 | } | |
4177 | else | |
4178 | { | |
4179 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ | |
4180 | found_match = MATCH_ERROR; | |
4181 | } | |
4182 | break; | |
4183 | default: | |
4184 | gfc_error ("Unexpected junk after function declaration at %C"); | |
4185 | found_match = MATCH_ERROR; | |
4186 | break; | |
4187 | } | |
4188 | ||
c5d33754 | 4189 | if (is_bind_c == MATCH_YES) |
4518e961 | 4190 | { |
75ae7f6c | 4191 | /* Fortran 2008 draft allows BIND(C) for internal procedures. */ |
4518e961 | 4192 | if (gfc_current_state () == COMP_CONTAINS |
75ae7f6c | 4193 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
2dcae6c7 | 4194 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
4195 | "at %L may not be specified for an internal " | |
4196 | "procedure", &gfc_current_locus) | |
75ae7f6c | 4197 | == FAILURE) |
4198 | return MATCH_ERROR; | |
4199 | ||
4518e961 | 4200 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) |
4201 | == FAILURE) | |
4202 | return MATCH_ERROR; | |
4203 | } | |
c5d33754 | 4204 | |
4205 | return found_match; | |
4206 | } | |
4207 | ||
4208 | ||
1e057e9b | 4209 | /* Procedure pointer return value without RESULT statement: |
4210 | Add "hidden" result variable named "ppr@". */ | |
4211 | ||
4212 | static gfc_try | |
4213 | add_hidden_procptr_result (gfc_symbol *sym) | |
4214 | { | |
4215 | bool case1,case2; | |
4216 | ||
4217 | if (gfc_notification_std (GFC_STD_F2003) == ERROR) | |
4218 | return FAILURE; | |
4219 | ||
4220 | /* First usage case: PROCEDURE and EXTERNAL statements. */ | |
4221 | case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block () | |
4222 | && strcmp (gfc_current_block ()->name, sym->name) == 0 | |
4223 | && sym->attr.external; | |
4224 | /* Second usage case: INTERFACE statements. */ | |
4225 | case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous | |
4226 | && gfc_state_stack->previous->state == COMP_FUNCTION | |
4227 | && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0; | |
4228 | ||
4229 | if (case1 || case2) | |
4230 | { | |
4231 | gfc_symtree *stree; | |
4232 | if (case1) | |
36b0a1b0 | 4233 | gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false); |
1e057e9b | 4234 | else if (case2) |
180a5dc0 | 4235 | { |
4236 | gfc_symtree *st2; | |
36b0a1b0 | 4237 | gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false); |
180a5dc0 | 4238 | st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@"); |
4239 | st2->n.sym = stree->n.sym; | |
4240 | } | |
1e057e9b | 4241 | sym->result = stree->n.sym; |
4242 | ||
4243 | sym->result->attr.proc_pointer = sym->attr.proc_pointer; | |
4244 | sym->result->attr.pointer = sym->attr.pointer; | |
4245 | sym->result->attr.external = sym->attr.external; | |
4246 | sym->result->attr.referenced = sym->attr.referenced; | |
e40ac2fe | 4247 | sym->result->ts = sym->ts; |
1e057e9b | 4248 | sym->attr.proc_pointer = 0; |
4249 | sym->attr.pointer = 0; | |
4250 | sym->attr.external = 0; | |
4251 | if (sym->result->attr.external && sym->result->attr.pointer) | |
4252 | { | |
4253 | sym->result->attr.pointer = 0; | |
4254 | sym->result->attr.proc_pointer = 1; | |
4255 | } | |
4256 | ||
4257 | return gfc_add_result (&sym->result->attr, sym->result->name, NULL); | |
4258 | } | |
4259 | /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */ | |
4260 | else if (sym->attr.function && !sym->attr.external && sym->attr.pointer | |
4261 | && sym->result && sym->result != sym && sym->result->attr.external | |
4262 | && sym == gfc_current_ns->proc_name | |
4263 | && sym == sym->result->ns->proc_name | |
4264 | && strcmp ("ppr@", sym->result->name) == 0) | |
4265 | { | |
4266 | sym->result->attr.proc_pointer = 1; | |
4267 | sym->attr.pointer = 0; | |
4268 | return SUCCESS; | |
4269 | } | |
4270 | else | |
4271 | return FAILURE; | |
4272 | } | |
4273 | ||
4274 | ||
64e93293 | 4275 | /* Match the interface for a PROCEDURE declaration, |
4276 | including brackets (R1212). */ | |
af1a34ee | 4277 | |
4278 | static match | |
64e93293 | 4279 | match_procedure_interface (gfc_symbol **proc_if) |
af1a34ee | 4280 | { |
4281 | match m; | |
1eb2b542 | 4282 | gfc_symtree *st; |
af1a34ee | 4283 | locus old_loc, entry_loc; |
1eb2b542 | 4284 | gfc_namespace *old_ns = gfc_current_ns; |
4285 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
af1a34ee | 4286 | |
1eb2b542 | 4287 | old_loc = entry_loc = gfc_current_locus; |
af1a34ee | 4288 | gfc_clear_ts (¤t_ts); |
4289 | ||
4290 | if (gfc_match (" (") != MATCH_YES) | |
4291 | { | |
4292 | gfc_current_locus = entry_loc; | |
4293 | return MATCH_NO; | |
4294 | } | |
4295 | ||
4296 | /* Get the type spec. for the procedure interface. */ | |
4297 | old_loc = gfc_current_locus; | |
e8152f13 | 4298 | m = gfc_match_decl_type_spec (¤t_ts, 0); |
fd1277c3 | 4299 | gfc_gobble_whitespace (); |
e0be6f02 | 4300 | if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')')) |
af1a34ee | 4301 | goto got_ts; |
4302 | ||
4303 | if (m == MATCH_ERROR) | |
4304 | return m; | |
4305 | ||
1eb2b542 | 4306 | /* Procedure interface is itself a procedure. */ |
af1a34ee | 4307 | gfc_current_locus = old_loc; |
1eb2b542 | 4308 | m = gfc_match_name (name); |
af1a34ee | 4309 | |
1eb2b542 | 4310 | /* First look to see if it is already accessible in the current |
4311 | namespace because it is use associated or contained. */ | |
4312 | st = NULL; | |
4313 | if (gfc_find_sym_tree (name, NULL, 0, &st)) | |
4314 | return MATCH_ERROR; | |
4315 | ||
4316 | /* If it is still not found, then try the parent namespace, if it | |
4317 | exists and create the symbol there if it is still not found. */ | |
4318 | if (gfc_current_ns->parent) | |
4319 | gfc_current_ns = gfc_current_ns->parent; | |
4320 | if (st == NULL && gfc_get_ha_sym_tree (name, &st)) | |
4321 | return MATCH_ERROR; | |
4322 | ||
4323 | gfc_current_ns = old_ns; | |
4324 | *proc_if = st->n.sym; | |
af1a34ee | 4325 | |
4326 | /* Various interface checks. */ | |
64e93293 | 4327 | if (*proc_if) |
af1a34ee | 4328 | { |
64e93293 | 4329 | (*proc_if)->refs++; |
74113644 | 4330 | /* Resolve interface if possible. That way, attr.procedure is only set |
4331 | if it is declared by a later procedure-declaration-stmt, which is | |
4332 | invalid per C1212. */ | |
64e93293 | 4333 | while ((*proc_if)->ts.interface) |
4334 | *proc_if = (*proc_if)->ts.interface; | |
74113644 | 4335 | |
64e93293 | 4336 | if ((*proc_if)->generic) |
af1a34ee | 4337 | { |
64e93293 | 4338 | gfc_error ("Interface '%s' at %C may not be generic", |
4339 | (*proc_if)->name); | |
af1a34ee | 4340 | return MATCH_ERROR; |
4341 | } | |
64e93293 | 4342 | if ((*proc_if)->attr.proc == PROC_ST_FUNCTION) |
af1a34ee | 4343 | { |
4344 | gfc_error ("Interface '%s' at %C may not be a statement function", | |
64e93293 | 4345 | (*proc_if)->name); |
af1a34ee | 4346 | return MATCH_ERROR; |
4347 | } | |
4348 | /* Handle intrinsic procedures. */ | |
64e93293 | 4349 | if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc |
4350 | || (*proc_if)->attr.if_source == IFSRC_IFBODY) | |
4351 | && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus) | |
4352 | || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus))) | |
4353 | (*proc_if)->attr.intrinsic = 1; | |
4354 | if ((*proc_if)->attr.intrinsic | |
4355 | && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0)) | |
af1a34ee | 4356 | { |
4357 | gfc_error ("Intrinsic procedure '%s' not allowed " | |
64e93293 | 4358 | "in PROCEDURE statement at %C", (*proc_if)->name); |
af1a34ee | 4359 | return MATCH_ERROR; |
4360 | } | |
af1a34ee | 4361 | } |
4362 | ||
4363 | got_ts: | |
af1a34ee | 4364 | if (gfc_match (" )") != MATCH_YES) |
4365 | { | |
4366 | gfc_current_locus = entry_loc; | |
4367 | return MATCH_NO; | |
4368 | } | |
4369 | ||
64e93293 | 4370 | return MATCH_YES; |
4371 | } | |
4372 | ||
4373 | ||
4374 | /* Match a PROCEDURE declaration (R1211). */ | |
4375 | ||
4376 | static match | |
4377 | match_procedure_decl (void) | |
4378 | { | |
4379 | match m; | |
4380 | gfc_symbol *sym, *proc_if = NULL; | |
4381 | int num; | |
4382 | gfc_expr *initializer = NULL; | |
4383 | ||
4384 | /* Parse interface (with brackets). */ | |
4385 | m = match_procedure_interface (&proc_if); | |
4386 | if (m != MATCH_YES) | |
4387 | return m; | |
4388 | ||
4389 | /* Parse attributes (with colons). */ | |
af1a34ee | 4390 | m = match_attr_spec(); |
4391 | if (m == MATCH_ERROR) | |
4392 | return MATCH_ERROR; | |
4393 | ||
4394 | /* Get procedure symbols. */ | |
4395 | for(num=1;;num++) | |
4396 | { | |
af1a34ee | 4397 | m = gfc_match_symbol (&sym, 0); |
4398 | if (m == MATCH_NO) | |
4399 | goto syntax; | |
4400 | else if (m == MATCH_ERROR) | |
4401 | return m; | |
4402 | ||
4403 | /* Add current_attr to the symbol attributes. */ | |
4404 | if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
4405 | return MATCH_ERROR; | |
4406 | ||
4407 | if (sym->attr.is_bind_c) | |
4408 | { | |
4409 | /* Check for C1218. */ | |
4410 | if (!proc_if || !proc_if->attr.is_bind_c) | |
4411 | { | |
4412 | gfc_error ("BIND(C) attribute at %C requires " | |
4413 | "an interface with BIND(C)"); | |
4414 | return MATCH_ERROR; | |
4415 | } | |
4416 | /* Check for C1217. */ | |
4417 | if (has_name_equals && sym->attr.pointer) | |
4418 | { | |
4419 | gfc_error ("BIND(C) procedure with NAME may not have " | |
4420 | "POINTER attribute at %C"); | |
4421 | return MATCH_ERROR; | |
4422 | } | |
4423 | if (has_name_equals && sym->attr.dummy) | |
4424 | { | |
4425 | gfc_error ("Dummy procedure at %C may not have " | |
4426 | "BIND(C) attribute with NAME"); | |
4427 | return MATCH_ERROR; | |
4428 | } | |
4429 | /* Set binding label for BIND(C). */ | |
4430 | if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS) | |
4431 | return MATCH_ERROR; | |
4432 | } | |
4433 | ||
cad0ddcf | 4434 | if (gfc_add_external (&sym->attr, NULL) == FAILURE) |
af1a34ee | 4435 | return MATCH_ERROR; |
1e057e9b | 4436 | |
4437 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4438 | sym = sym->result; | |
4439 | ||
af1a34ee | 4440 | if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE) |
4441 | return MATCH_ERROR; | |
4442 | ||
4443 | /* Set interface. */ | |
4444 | if (proc_if != NULL) | |
f7d7a083 | 4445 | { |
13a834aa | 4446 | if (sym->ts.type != BT_UNKNOWN) |
4447 | { | |
4448 | gfc_error ("Procedure '%s' at %L already has basic type of %s", | |
4449 | sym->name, &gfc_current_locus, | |
4450 | gfc_basic_typename (sym->ts.type)); | |
4451 | return MATCH_ERROR; | |
4452 | } | |
2cd2bb5c | 4453 | sym->ts.interface = proc_if; |
f7d7a083 | 4454 | sym->attr.untyped = 1; |
180a5dc0 | 4455 | sym->attr.if_source = IFSRC_IFBODY; |
f7d7a083 | 4456 | } |
af1a34ee | 4457 | else if (current_ts.type != BT_UNKNOWN) |
4458 | { | |
13a834aa | 4459 | if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) |
4460 | return MATCH_ERROR; | |
2cd2bb5c | 4461 | sym->ts.interface = gfc_new_symbol ("", gfc_current_ns); |
4462 | sym->ts.interface->ts = current_ts; | |
4463 | sym->ts.interface->attr.function = 1; | |
4464 | sym->attr.function = sym->ts.interface->attr.function; | |
180a5dc0 | 4465 | sym->attr.if_source = IFSRC_UNKNOWN; |
af1a34ee | 4466 | } |
4467 | ||
cad0ddcf | 4468 | if (gfc_match (" =>") == MATCH_YES) |
4469 | { | |
4470 | if (!current_attr.pointer) | |
4471 | { | |
4472 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
4473 | m = MATCH_ERROR; | |
4474 | goto cleanup; | |
4475 | } | |
4476 | ||
4477 | m = gfc_match_null (&initializer); | |
4478 | if (m == MATCH_NO) | |
4479 | { | |
4480 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4481 | m = MATCH_ERROR; | |
4482 | } | |
4483 | ||
4484 | if (gfc_pure (NULL)) | |
4485 | { | |
4486 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4487 | "a PURE procedure"); | |
4488 | m = MATCH_ERROR; | |
4489 | } | |
4490 | ||
4491 | if (m != MATCH_YES) | |
4492 | goto cleanup; | |
4493 | ||
4494 | if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus) | |
4495 | != SUCCESS) | |
4496 | goto cleanup; | |
4497 | ||
4498 | } | |
4499 | ||
4500 | gfc_set_sym_referenced (sym); | |
4501 | ||
af1a34ee | 4502 | if (gfc_match_eos () == MATCH_YES) |
4503 | return MATCH_YES; | |
4504 | if (gfc_match_char (',') != MATCH_YES) | |
4505 | goto syntax; | |
4506 | } | |
4507 | ||
4508 | syntax: | |
4509 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4510 | return MATCH_ERROR; | |
cad0ddcf | 4511 | |
4512 | cleanup: | |
4513 | /* Free stuff up and return. */ | |
4514 | gfc_free_expr (initializer); | |
4515 | return m; | |
af1a34ee | 4516 | } |
4517 | ||
4518 | ||
64e93293 | 4519 | static match |
4520 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc); | |
4521 | ||
4522 | ||
4523 | /* Match a procedure pointer component declaration (R445). */ | |
4524 | ||
4525 | static match | |
4526 | match_ppc_decl (void) | |
4527 | { | |
4528 | match m; | |
4529 | gfc_symbol *proc_if = NULL; | |
4530 | gfc_typespec ts; | |
4531 | int num; | |
4532 | gfc_component *c; | |
4533 | gfc_expr *initializer = NULL; | |
4534 | gfc_typebound_proc* tb; | |
4535 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4536 | ||
4537 | /* Parse interface (with brackets). */ | |
4538 | m = match_procedure_interface (&proc_if); | |
4539 | if (m != MATCH_YES) | |
4540 | goto syntax; | |
4541 | ||
4542 | /* Parse attributes. */ | |
4543 | tb = XCNEW (gfc_typebound_proc); | |
4544 | tb->where = gfc_current_locus; | |
4545 | m = match_binding_attributes (tb, false, true); | |
4546 | if (m == MATCH_ERROR) | |
4547 | return m; | |
4548 | ||
64e93293 | 4549 | gfc_clear_attr (¤t_attr); |
4550 | current_attr.procedure = 1; | |
4551 | current_attr.proc_pointer = 1; | |
4552 | current_attr.access = tb->access; | |
4553 | current_attr.flavor = FL_PROCEDURE; | |
4554 | ||
4555 | /* Match the colons (required). */ | |
4556 | if (gfc_match (" ::") != MATCH_YES) | |
4557 | { | |
4558 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
4559 | return MATCH_ERROR; | |
4560 | } | |
4561 | ||
4562 | /* Check for C450. */ | |
4563 | if (!tb->nopass && proc_if == NULL) | |
4564 | { | |
4565 | gfc_error("NOPASS or explicit interface required at %C"); | |
4566 | return MATCH_ERROR; | |
4567 | } | |
4568 | ||
8a026279 | 4569 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Procedure pointer " |
4570 | "component at %C") == FAILURE) | |
4571 | return MATCH_ERROR; | |
4572 | ||
64e93293 | 4573 | /* Match PPC names. */ |
4574 | ts = current_ts; | |
4575 | for(num=1;;num++) | |
4576 | { | |
4577 | m = gfc_match_name (name); | |
4578 | if (m == MATCH_NO) | |
4579 | goto syntax; | |
4580 | else if (m == MATCH_ERROR) | |
4581 | return m; | |
4582 | ||
4583 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
4584 | return MATCH_ERROR; | |
4585 | ||
4586 | /* Add current_attr to the symbol attributes. */ | |
4587 | if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE) | |
4588 | return MATCH_ERROR; | |
4589 | ||
4590 | if (gfc_add_external (&c->attr, NULL) == FAILURE) | |
4591 | return MATCH_ERROR; | |
4592 | ||
4593 | if (gfc_add_proc (&c->attr, name, NULL) == FAILURE) | |
4594 | return MATCH_ERROR; | |
4595 | ||
fe9b08a2 | 4596 | c->tb = tb; |
4597 | ||
64e93293 | 4598 | /* Set interface. */ |
4599 | if (proc_if != NULL) | |
4600 | { | |
4601 | c->ts.interface = proc_if; | |
4602 | c->attr.untyped = 1; | |
4603 | c->attr.if_source = IFSRC_IFBODY; | |
4604 | } | |
4605 | else if (ts.type != BT_UNKNOWN) | |
4606 | { | |
4607 | c->ts = ts; | |
4608 | c->ts.interface = gfc_new_symbol ("", gfc_current_ns); | |
4609 | c->ts.interface->ts = ts; | |
4610 | c->ts.interface->attr.function = 1; | |
4611 | c->attr.function = c->ts.interface->attr.function; | |
4612 | c->attr.if_source = IFSRC_UNKNOWN; | |
4613 | } | |
4614 | ||
4615 | if (gfc_match (" =>") == MATCH_YES) | |
4616 | { | |
4617 | m = gfc_match_null (&initializer); | |
4618 | if (m == MATCH_NO) | |
4619 | { | |
4620 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4621 | m = MATCH_ERROR; | |
4622 | } | |
4623 | if (gfc_pure (NULL)) | |
4624 | { | |
4625 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4626 | "a PURE procedure"); | |
4627 | m = MATCH_ERROR; | |
4628 | } | |
4629 | if (m != MATCH_YES) | |
4630 | { | |
4631 | gfc_free_expr (initializer); | |
4632 | return m; | |
4633 | } | |
4634 | c->initializer = initializer; | |
4635 | } | |
4636 | ||
4637 | if (gfc_match_eos () == MATCH_YES) | |
4638 | return MATCH_YES; | |
4639 | if (gfc_match_char (',') != MATCH_YES) | |
4640 | goto syntax; | |
4641 | } | |
4642 | ||
4643 | syntax: | |
4644 | gfc_error ("Syntax error in procedure pointer component at %C"); | |
4645 | return MATCH_ERROR; | |
4646 | } | |
4647 | ||
4648 | ||
af1a34ee | 4649 | /* Match a PROCEDURE declaration inside an interface (R1206). */ |
4650 | ||
4651 | static match | |
4652 | match_procedure_in_interface (void) | |
4653 | { | |
4654 | match m; | |
4655 | gfc_symbol *sym; | |
4656 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4657 | ||
4658 | if (current_interface.type == INTERFACE_NAMELESS | |
4659 | || current_interface.type == INTERFACE_ABSTRACT) | |
4660 | { | |
4661 | gfc_error ("PROCEDURE at %C must be in a generic interface"); | |
4662 | return MATCH_ERROR; | |
4663 | } | |
4664 | ||
4665 | for(;;) | |
4666 | { | |
4667 | m = gfc_match_name (name); | |
4668 | if (m == MATCH_NO) | |
4669 | goto syntax; | |
4670 | else if (m == MATCH_ERROR) | |
4671 | return m; | |
4672 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
4673 | return MATCH_ERROR; | |
4674 | ||
4675 | if (gfc_add_interface (sym) == FAILURE) | |
4676 | return MATCH_ERROR; | |
4677 | ||
af1a34ee | 4678 | if (gfc_match_eos () == MATCH_YES) |
4679 | break; | |
4680 | if (gfc_match_char (',') != MATCH_YES) | |
4681 | goto syntax; | |
4682 | } | |
4683 | ||
4684 | return MATCH_YES; | |
4685 | ||
4686 | syntax: | |
4687 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4688 | return MATCH_ERROR; | |
4689 | } | |
4690 | ||
4691 | ||
4692 | /* General matcher for PROCEDURE declarations. */ | |
4693 | ||
7fd88f6e | 4694 | static match match_procedure_in_type (void); |
4695 | ||
af1a34ee | 4696 | match |
4697 | gfc_match_procedure (void) | |
4698 | { | |
4699 | match m; | |
4700 | ||
4701 | switch (gfc_current_state ()) | |
4702 | { | |
4703 | case COMP_NONE: | |
4704 | case COMP_PROGRAM: | |
4705 | case COMP_MODULE: | |
4706 | case COMP_SUBROUTINE: | |
4707 | case COMP_FUNCTION: | |
4708 | m = match_procedure_decl (); | |
4709 | break; | |
4710 | case COMP_INTERFACE: | |
4711 | m = match_procedure_in_interface (); | |
4712 | break; | |
4713 | case COMP_DERIVED: | |
64e93293 | 4714 | m = match_ppc_decl (); |
4715 | break; | |
7fd88f6e | 4716 | case COMP_DERIVED_CONTAINS: |
4717 | m = match_procedure_in_type (); | |
4718 | break; | |
af1a34ee | 4719 | default: |
4720 | return MATCH_NO; | |
4721 | } | |
4722 | ||
4723 | if (m != MATCH_YES) | |
4724 | return m; | |
4725 | ||
4726 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C") | |
4727 | == FAILURE) | |
4728 | return MATCH_ERROR; | |
4729 | ||
4730 | return m; | |
4731 | } | |
4732 | ||
4733 | ||
a34926ba | 4734 | /* Warn if a matched procedure has the same name as an intrinsic; this is |
4735 | simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current | |
4736 | parser-state-stack to find out whether we're in a module. */ | |
4737 | ||
4738 | static void | |
4739 | warn_intrinsic_shadow (const gfc_symbol* sym, bool func) | |
4740 | { | |
4741 | bool in_module; | |
4742 | ||
4743 | in_module = (gfc_state_stack->previous | |
4744 | && gfc_state_stack->previous->state == COMP_MODULE); | |
4745 | ||
4746 | gfc_warn_intrinsic_shadow (sym, in_module, func); | |
4747 | } | |
4748 | ||
4749 | ||
4ee9c684 | 4750 | /* Match a function declaration. */ |
4751 | ||
4752 | match | |
4753 | gfc_match_function_decl (void) | |
4754 | { | |
4755 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4756 | gfc_symbol *sym, *result; | |
4757 | locus old_loc; | |
4758 | match m; | |
c5d33754 | 4759 | match suffix_match; |
4760 | match found_match; /* Status returned by match func. */ | |
4ee9c684 | 4761 | |
4762 | if (gfc_current_state () != COMP_NONE | |
4763 | && gfc_current_state () != COMP_INTERFACE | |
4764 | && gfc_current_state () != COMP_CONTAINS) | |
4765 | return MATCH_NO; | |
4766 | ||
4767 | gfc_clear_ts (¤t_ts); | |
4768 | ||
cbb9e6aa | 4769 | old_loc = gfc_current_locus; |
4ee9c684 | 4770 | |
077932f9 | 4771 | m = gfc_match_prefix (¤t_ts); |
4ee9c684 | 4772 | if (m != MATCH_YES) |
4773 | { | |
cbb9e6aa | 4774 | gfc_current_locus = old_loc; |
4ee9c684 | 4775 | return m; |
4776 | } | |
4777 | ||
4778 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
4779 | { | |
cbb9e6aa | 4780 | gfc_current_locus = old_loc; |
4ee9c684 | 4781 | return MATCH_NO; |
4782 | } | |
d77f260f | 4783 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 4784 | return MATCH_ERROR; |
1e057e9b | 4785 | |
4786 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4787 | sym = sym->result; | |
4788 | ||
4ee9c684 | 4789 | gfc_new_block = sym; |
4790 | ||
4791 | m = gfc_match_formal_arglist (sym, 0, 0); | |
4792 | if (m == MATCH_NO) | |
9b435b6d | 4793 | { |
4794 | gfc_error ("Expected formal argument list in function " | |
1a9745d2 | 4795 | "definition at %C"); |
9b435b6d | 4796 | m = MATCH_ERROR; |
4797 | goto cleanup; | |
4798 | } | |
4ee9c684 | 4799 | else if (m == MATCH_ERROR) |
4800 | goto cleanup; | |
4801 | ||
4802 | result = NULL; | |
4803 | ||
c5d33754 | 4804 | /* According to the draft, the bind(c) and result clause can |
4805 | come in either order after the formal_arg_list (i.e., either | |
4806 | can be first, both can exist together or by themselves or neither | |
4807 | one). Therefore, the match_result can't match the end of the | |
4808 | string, and check for the bind(c) or result clause in either order. */ | |
4809 | found_match = gfc_match_eos (); | |
4810 | ||
4811 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
4812 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4813 | not allowed for procedures. */ | |
4814 | if (sym->attr.is_bind_c == 1) | |
4815 | { | |
4816 | sym->attr.is_bind_c = 0; | |
4817 | if (sym->old_symbol != NULL) | |
4818 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4819 | "variables or common blocks", | |
4820 | &(sym->old_symbol->declared_at)); | |
4821 | else | |
4822 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4823 | "variables or common blocks", &gfc_current_locus); | |
4ee9c684 | 4824 | } |
4825 | ||
c5d33754 | 4826 | if (found_match != MATCH_YES) |
4ee9c684 | 4827 | { |
c5d33754 | 4828 | /* If we haven't found the end-of-statement, look for a suffix. */ |
4829 | suffix_match = gfc_match_suffix (sym, &result); | |
4830 | if (suffix_match == MATCH_YES) | |
4831 | /* Need to get the eos now. */ | |
4832 | found_match = gfc_match_eos (); | |
4833 | else | |
4834 | found_match = suffix_match; | |
4ee9c684 | 4835 | } |
4836 | ||
c5d33754 | 4837 | if(found_match != MATCH_YES) |
4838 | m = MATCH_ERROR; | |
4ee9c684 | 4839 | else |
4840 | { | |
c5d33754 | 4841 | /* Make changes to the symbol. */ |
4842 | m = MATCH_ERROR; | |
4843 | ||
4844 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) | |
4845 | goto cleanup; | |
4846 | ||
4847 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
4848 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4849 | goto cleanup; | |
4ee9c684 | 4850 | |
8d39570e | 4851 | /* Delay matching the function characteristics until after the |
077932f9 | 4852 | specification block by signalling kind=-1. */ |
8d39570e | 4853 | sym->declared_at = old_loc; |
4854 | if (current_ts.type != BT_UNKNOWN) | |
4855 | current_ts.kind = -1; | |
4856 | else | |
4857 | current_ts.kind = 0; | |
077932f9 | 4858 | |
c5d33754 | 4859 | if (result == NULL) |
4860 | { | |
0477d42d | 4861 | if (current_ts.type != BT_UNKNOWN |
4862 | && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) | |
4863 | goto cleanup; | |
c5d33754 | 4864 | sym->result = sym; |
4865 | } | |
4866 | else | |
4867 | { | |
0477d42d | 4868 | if (current_ts.type != BT_UNKNOWN |
4869 | && gfc_add_type (result, ¤t_ts, &gfc_current_locus) | |
4870 | == FAILURE) | |
4871 | goto cleanup; | |
c5d33754 | 4872 | sym->result = result; |
4873 | } | |
4874 | ||
a34926ba | 4875 | /* Warn if this procedure has the same name as an intrinsic. */ |
4876 | warn_intrinsic_shadow (sym, true); | |
4877 | ||
c5d33754 | 4878 | return MATCH_YES; |
4879 | } | |
4ee9c684 | 4880 | |
4881 | cleanup: | |
cbb9e6aa | 4882 | gfc_current_locus = old_loc; |
4ee9c684 | 4883 | return m; |
4884 | } | |
4885 | ||
1a9745d2 | 4886 | |
4887 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
4888 | pass the name of the entry, rather than the gfc_current_block name, and | |
4889 | to return false upon finding an existing global entry. */ | |
858f9894 | 4890 | |
4891 | static bool | |
1a9745d2 | 4892 | add_global_entry (const char *name, int sub) |
858f9894 | 4893 | { |
4894 | gfc_gsymbol *s; | |
8458f4ca | 4895 | enum gfc_symbol_type type; |
858f9894 | 4896 | |
4897 | s = gfc_get_gsymbol(name); | |
5b11d932 | 4898 | type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; |
858f9894 | 4899 | |
4900 | if (s->defined | |
1a9745d2 | 4901 | || (s->type != GSYM_UNKNOWN |
5b11d932 | 4902 | && s->type != type)) |
cbbac028 | 4903 | gfc_global_used(s, NULL); |
858f9894 | 4904 | else |
4905 | { | |
5b11d932 | 4906 | s->type = type; |
858f9894 | 4907 | s->where = gfc_current_locus; |
4908 | s->defined = 1; | |
83aeedb9 | 4909 | s->ns = gfc_current_ns; |
858f9894 | 4910 | return true; |
4911 | } | |
4912 | return false; | |
4913 | } | |
4ee9c684 | 4914 | |
1a9745d2 | 4915 | |
4ee9c684 | 4916 | /* Match an ENTRY statement. */ |
4917 | ||
4918 | match | |
4919 | gfc_match_entry (void) | |
4920 | { | |
1b716045 | 4921 | gfc_symbol *proc; |
4922 | gfc_symbol *result; | |
4923 | gfc_symbol *entry; | |
4ee9c684 | 4924 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
4925 | gfc_compile_state state; | |
4926 | match m; | |
1b716045 | 4927 | gfc_entry_list *el; |
7b5e1acc | 4928 | locus old_loc; |
d77f260f | 4929 | bool module_procedure; |
86f0974b | 4930 | char peek_char; |
4931 | match is_bind_c; | |
4ee9c684 | 4932 | |
4933 | m = gfc_match_name (name); | |
4934 | if (m != MATCH_YES) | |
4935 | return m; | |
4936 | ||
1b716045 | 4937 | state = gfc_current_state (); |
ea37f786 | 4938 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
1b716045 | 4939 | { |
ea37f786 | 4940 | switch (state) |
4941 | { | |
4942 | case COMP_PROGRAM: | |
4943 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
4944 | break; | |
4945 | case COMP_MODULE: | |
4946 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
4947 | break; | |
4948 | case COMP_BLOCK_DATA: | |
1a9745d2 | 4949 | gfc_error ("ENTRY statement at %C cannot appear within " |
4950 | "a BLOCK DATA"); | |
ea37f786 | 4951 | break; |
4952 | case COMP_INTERFACE: | |
1a9745d2 | 4953 | gfc_error ("ENTRY statement at %C cannot appear within " |
4954 | "an INTERFACE"); | |
ea37f786 | 4955 | break; |
4956 | case COMP_DERIVED: | |
1a9745d2 | 4957 | gfc_error ("ENTRY statement at %C cannot appear within " |
4958 | "a DERIVED TYPE block"); | |
ea37f786 | 4959 | break; |
4960 | case COMP_IF: | |
1a9745d2 | 4961 | gfc_error ("ENTRY statement at %C cannot appear within " |
4962 | "an IF-THEN block"); | |
ea37f786 | 4963 | break; |
4964 | case COMP_DO: | |
1a9745d2 | 4965 | gfc_error ("ENTRY statement at %C cannot appear within " |
4966 | "a DO block"); | |
ea37f786 | 4967 | break; |
4968 | case COMP_SELECT: | |
1a9745d2 | 4969 | gfc_error ("ENTRY statement at %C cannot appear within " |
4970 | "a SELECT block"); | |
ea37f786 | 4971 | break; |
4972 | case COMP_FORALL: | |
1a9745d2 | 4973 | gfc_error ("ENTRY statement at %C cannot appear within " |
4974 | "a FORALL block"); | |
ea37f786 | 4975 | break; |
4976 | case COMP_WHERE: | |
1a9745d2 | 4977 | gfc_error ("ENTRY statement at %C cannot appear within " |
4978 | "a WHERE block"); | |
ea37f786 | 4979 | break; |
4980 | case COMP_CONTAINS: | |
1a9745d2 | 4981 | gfc_error ("ENTRY statement at %C cannot appear within " |
4982 | "a contained subprogram"); | |
ea37f786 | 4983 | break; |
4984 | default: | |
4985 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
4986 | } | |
1b716045 | 4987 | return MATCH_ERROR; |
4988 | } | |
4989 | ||
d77f260f | 4990 | module_procedure = gfc_current_ns->parent != NULL |
1a9745d2 | 4991 | && gfc_current_ns->parent->proc_name |
4992 | && gfc_current_ns->parent->proc_name->attr.flavor | |
4993 | == FL_MODULE; | |
d77f260f | 4994 | |
1b716045 | 4995 | if (gfc_current_ns->parent != NULL |
4996 | && gfc_current_ns->parent->proc_name | |
d77f260f | 4997 | && !module_procedure) |
1b716045 | 4998 | { |
4999 | gfc_error("ENTRY statement at %C cannot appear in a " | |
5000 | "contained procedure"); | |
5001 | return MATCH_ERROR; | |
5002 | } | |
5003 | ||
d77f260f | 5004 | /* Module function entries need special care in get_proc_name |
5005 | because previous references within the function will have | |
5006 | created symbols attached to the current namespace. */ | |
5007 | if (get_proc_name (name, &entry, | |
5008 | gfc_current_ns->parent != NULL | |
c1e4695a | 5009 | && module_procedure)) |
4ee9c684 | 5010 | return MATCH_ERROR; |
5011 | ||
1b716045 | 5012 | proc = gfc_current_block (); |
5013 | ||
86f0974b | 5014 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
5015 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
5016 | not allowed for procedures. */ | |
5017 | if (entry->attr.is_bind_c == 1) | |
5018 | { | |
5019 | entry->attr.is_bind_c = 0; | |
5020 | if (entry->old_symbol != NULL) | |
5021 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5022 | "variables or common blocks", | |
5023 | &(entry->old_symbol->declared_at)); | |
5024 | else | |
5025 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5026 | "variables or common blocks", &gfc_current_locus); | |
5027 | } | |
5028 | ||
5029 | /* Check what next non-whitespace character is so we can tell if there | |
5030 | is the required parens if we have a BIND(C). */ | |
5031 | gfc_gobble_whitespace (); | |
e0be6f02 | 5032 | peek_char = gfc_peek_ascii_char (); |
86f0974b | 5033 | |
1b716045 | 5034 | if (state == COMP_SUBROUTINE) |
4ee9c684 | 5035 | { |
950683ed | 5036 | /* An entry in a subroutine. */ |
8cafc742 | 5037 | if (!gfc_current_ns->parent && !add_global_entry (name, 1)) |
858f9894 | 5038 | return MATCH_ERROR; |
5039 | ||
4ee9c684 | 5040 | m = gfc_match_formal_arglist (entry, 0, 1); |
5041 | if (m != MATCH_YES) | |
5042 | return MATCH_ERROR; | |
5043 | ||
75ae7f6c | 5044 | /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can |
5045 | never be an internal procedure. */ | |
5046 | is_bind_c = gfc_match_bind_c (entry, true); | |
86f0974b | 5047 | if (is_bind_c == MATCH_ERROR) |
5048 | return MATCH_ERROR; | |
5049 | if (is_bind_c == MATCH_YES) | |
5050 | { | |
5051 | if (peek_char != '(') | |
5052 | { | |
5053 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
5054 | return MATCH_ERROR; | |
5055 | } | |
5056 | if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1) | |
5057 | == FAILURE) | |
5058 | return MATCH_ERROR; | |
5059 | } | |
5060 | ||
950683ed | 5061 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
5062 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 5063 | return MATCH_ERROR; |
1b716045 | 5064 | } |
5065 | else | |
5066 | { | |
7b5e1acc | 5067 | /* An entry in a function. |
1a9745d2 | 5068 | We need to take special care because writing |
5069 | ENTRY f() | |
5070 | as | |
5071 | ENTRY f | |
5072 | is allowed, whereas | |
5073 | ENTRY f() RESULT (r) | |
5074 | can't be written as | |
5075 | ENTRY f RESULT (r). */ | |
8cafc742 | 5076 | if (!gfc_current_ns->parent && !add_global_entry (name, 0)) |
858f9894 | 5077 | return MATCH_ERROR; |
5078 | ||
7b5e1acc | 5079 | old_loc = gfc_current_locus; |
5080 | if (gfc_match_eos () == MATCH_YES) | |
5081 | { | |
5082 | gfc_current_locus = old_loc; | |
5083 | /* Match the empty argument list, and add the interface to | |
5084 | the symbol. */ | |
5085 | m = gfc_match_formal_arglist (entry, 0, 1); | |
5086 | } | |
5087 | else | |
5088 | m = gfc_match_formal_arglist (entry, 0, 0); | |
5089 | ||
4ee9c684 | 5090 | if (m != MATCH_YES) |
5091 | return MATCH_ERROR; | |
5092 | ||
4ee9c684 | 5093 | result = NULL; |
5094 | ||
5095 | if (gfc_match_eos () == MATCH_YES) | |
5096 | { | |
950683ed | 5097 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
5098 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
4ee9c684 | 5099 | return MATCH_ERROR; |
5100 | ||
c6871095 | 5101 | entry->result = entry; |
4ee9c684 | 5102 | } |
5103 | else | |
5104 | { | |
86f0974b | 5105 | m = gfc_match_suffix (entry, &result); |
4ee9c684 | 5106 | if (m == MATCH_NO) |
5107 | gfc_syntax_error (ST_ENTRY); | |
5108 | if (m != MATCH_YES) | |
5109 | return MATCH_ERROR; | |
5110 | ||
86f0974b | 5111 | if (result) |
5112 | { | |
5113 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE | |
5114 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
5115 | || gfc_add_function (&entry->attr, result->name, NULL) | |
5116 | == FAILURE) | |
5117 | return MATCH_ERROR; | |
5118 | entry->result = result; | |
5119 | } | |
5120 | else | |
5121 | { | |
5122 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE | |
5123 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
5124 | return MATCH_ERROR; | |
5125 | entry->result = entry; | |
5126 | } | |
4ee9c684 | 5127 | } |
4ee9c684 | 5128 | } |
5129 | ||
5130 | if (gfc_match_eos () != MATCH_YES) | |
5131 | { | |
5132 | gfc_syntax_error (ST_ENTRY); | |
5133 | return MATCH_ERROR; | |
5134 | } | |
5135 | ||
1b716045 | 5136 | entry->attr.recursive = proc->attr.recursive; |
5137 | entry->attr.elemental = proc->attr.elemental; | |
5138 | entry->attr.pure = proc->attr.pure; | |
4ee9c684 | 5139 | |
1b716045 | 5140 | el = gfc_get_entry_list (); |
5141 | el->sym = entry; | |
5142 | el->next = gfc_current_ns->entries; | |
5143 | gfc_current_ns->entries = el; | |
5144 | if (el->next) | |
5145 | el->id = el->next->id + 1; | |
5146 | else | |
5147 | el->id = 1; | |
4ee9c684 | 5148 | |
1b716045 | 5149 | new_st.op = EXEC_ENTRY; |
5150 | new_st.ext.entry = el; | |
5151 | ||
5152 | return MATCH_YES; | |
4ee9c684 | 5153 | } |
5154 | ||
5155 | ||
5156 | /* Match a subroutine statement, including optional prefixes. */ | |
5157 | ||
5158 | match | |
5159 | gfc_match_subroutine (void) | |
5160 | { | |
5161 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5162 | gfc_symbol *sym; | |
5163 | match m; | |
c5d33754 | 5164 | match is_bind_c; |
5165 | char peek_char; | |
75ae7f6c | 5166 | bool allow_binding_name; |
4ee9c684 | 5167 | |
5168 | if (gfc_current_state () != COMP_NONE | |
5169 | && gfc_current_state () != COMP_INTERFACE | |
5170 | && gfc_current_state () != COMP_CONTAINS) | |
5171 | return MATCH_NO; | |
5172 | ||
077932f9 | 5173 | m = gfc_match_prefix (NULL); |
4ee9c684 | 5174 | if (m != MATCH_YES) |
5175 | return m; | |
5176 | ||
5177 | m = gfc_match ("subroutine% %n", name); | |
5178 | if (m != MATCH_YES) | |
5179 | return m; | |
5180 | ||
d77f260f | 5181 | if (get_proc_name (name, &sym, false)) |
4ee9c684 | 5182 | return MATCH_ERROR; |
1e057e9b | 5183 | |
22c1d301 | 5184 | /* Set declared_at as it might point to, e.g., a PUBLIC statement, if |
5185 | the symbol existed before. */ | |
5186 | sym->declared_at = gfc_current_locus; | |
5187 | ||
1e057e9b | 5188 | if (add_hidden_procptr_result (sym) == SUCCESS) |
5189 | sym = sym->result; | |
5190 | ||
4ee9c684 | 5191 | gfc_new_block = sym; |
5192 | ||
c5d33754 | 5193 | /* Check what next non-whitespace character is so we can tell if there |
86f0974b | 5194 | is the required parens if we have a BIND(C). */ |
c5d33754 | 5195 | gfc_gobble_whitespace (); |
e0be6f02 | 5196 | peek_char = gfc_peek_ascii_char (); |
c5d33754 | 5197 | |
950683ed | 5198 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
4ee9c684 | 5199 | return MATCH_ERROR; |
5200 | ||
5201 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
5202 | return MATCH_ERROR; | |
5203 | ||
c5d33754 | 5204 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
5205 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
5206 | not allowed for procedures. */ | |
5207 | if (sym->attr.is_bind_c == 1) | |
5208 | { | |
5209 | sym->attr.is_bind_c = 0; | |
5210 | if (sym->old_symbol != NULL) | |
5211 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5212 | "variables or common blocks", | |
5213 | &(sym->old_symbol->declared_at)); | |
5214 | else | |
5215 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5216 | "variables or common blocks", &gfc_current_locus); | |
5217 | } | |
75ae7f6c | 5218 | |
5219 | /* C binding names are not allowed for internal procedures. */ | |
5220 | if (gfc_current_state () == COMP_CONTAINS | |
5221 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
5222 | allow_binding_name = false; | |
5223 | else | |
5224 | allow_binding_name = true; | |
5225 | ||
c5d33754 | 5226 | /* Here, we are just checking if it has the bind(c) attribute, and if |
5227 | so, then we need to make sure it's all correct. If it doesn't, | |
5228 | we still need to continue matching the rest of the subroutine line. */ | |
75ae7f6c | 5229 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
c5d33754 | 5230 | if (is_bind_c == MATCH_ERROR) |
5231 | { | |
5232 | /* There was an attempt at the bind(c), but it was wrong. An | |
5233 | error message should have been printed w/in the gfc_match_bind_c | |
5234 | so here we'll just return the MATCH_ERROR. */ | |
5235 | return MATCH_ERROR; | |
5236 | } | |
5237 | ||
5238 | if (is_bind_c == MATCH_YES) | |
5239 | { | |
75ae7f6c | 5240 | /* The following is allowed in the Fortran 2008 draft. */ |
4518e961 | 5241 | if (gfc_current_state () == COMP_CONTAINS |
75ae7f6c | 5242 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
2dcae6c7 | 5243 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
5244 | "at %L may not be specified for an internal " | |
5245 | "procedure", &gfc_current_locus) | |
75ae7f6c | 5246 | == FAILURE) |
5247 | return MATCH_ERROR; | |
5248 | ||
c5d33754 | 5249 | if (peek_char != '(') |
5250 | { | |
5251 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
5252 | return MATCH_ERROR; | |
5253 | } | |
5254 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) | |
5255 | == FAILURE) | |
5256 | return MATCH_ERROR; | |
5257 | } | |
5258 | ||
4ee9c684 | 5259 | if (gfc_match_eos () != MATCH_YES) |
5260 | { | |
5261 | gfc_syntax_error (ST_SUBROUTINE); | |
5262 | return MATCH_ERROR; | |
5263 | } | |
5264 | ||
5265 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
5266 | return MATCH_ERROR; | |
5267 | ||
a34926ba | 5268 | /* Warn if it has the same name as an intrinsic. */ |
5269 | warn_intrinsic_shadow (sym, false); | |
5270 | ||
4ee9c684 | 5271 | return MATCH_YES; |
5272 | } | |
5273 | ||
5274 | ||
c5d33754 | 5275 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
5276 | given, and set the binding label in either the given symbol (if not | |
a0527218 | 5277 | NULL), or in the current_ts. The symbol may be NULL because we may |
c5d33754 | 5278 | encounter the BIND(C) before the declaration itself. Return |
5279 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, | |
5280 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, | |
5281 | or MATCH_YES if the specifier was correct and the binding label and | |
5282 | bind(c) fields were set correctly for the given symbol or the | |
75ae7f6c | 5283 | current_ts. If allow_binding_name is false, no binding name may be |
5284 | given. */ | |
c5d33754 | 5285 | |
5286 | match | |
75ae7f6c | 5287 | gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name) |
c5d33754 | 5288 | { |
5289 | /* binding label, if exists */ | |
5290 | char binding_label[GFC_MAX_SYMBOL_LEN + 1]; | |
5291 | match double_quote; | |
5292 | match single_quote; | |
c5d33754 | 5293 | |
5294 | /* Initialize the flag that specifies whether we encountered a NAME= | |
5295 | specifier or not. */ | |
5296 | has_name_equals = 0; | |
5297 | ||
5298 | /* Init the first char to nil so we can catch if we don't have | |
5299 | the label (name attr) or the symbol name yet. */ | |
5300 | binding_label[0] = '\0'; | |
5301 | ||
5302 | /* This much we have to be able to match, in this order, if | |
5303 | there is a bind(c) label. */ | |
5304 | if (gfc_match (" bind ( c ") != MATCH_YES) | |
5305 | return MATCH_NO; | |
5306 | ||
5307 | /* Now see if there is a binding label, or if we've reached the | |
5308 | end of the bind(c) attribute without one. */ | |
5309 | if (gfc_match_char (',') == MATCH_YES) | |
5310 | { | |
5311 | if (gfc_match (" name = ") != MATCH_YES) | |
5312 | { | |
5313 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5314 | "at %C"); | |
5315 | /* should give an error message here */ | |
5316 | return MATCH_ERROR; | |
5317 | } | |
5318 | ||
5319 | has_name_equals = 1; | |
5320 | ||
5321 | /* Get the opening quote. */ | |
5322 | double_quote = MATCH_YES; | |
5323 | single_quote = MATCH_YES; | |
5324 | double_quote = gfc_match_char ('"'); | |
5325 | if (double_quote != MATCH_YES) | |
5326 | single_quote = gfc_match_char ('\''); | |
5327 | if (double_quote != MATCH_YES && single_quote != MATCH_YES) | |
5328 | { | |
5329 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5330 | "at %C"); | |
5331 | return MATCH_ERROR; | |
5332 | } | |
5333 | ||
5334 | /* Grab the binding label, using functions that will not lower | |
5335 | case the names automatically. */ | |
5336 | if (gfc_match_name_C (binding_label) != MATCH_YES) | |
5337 | return MATCH_ERROR; | |
5338 | ||
5339 | /* Get the closing quotation. */ | |
5340 | if (double_quote == MATCH_YES) | |
5341 | { | |
5342 | if (gfc_match_char ('"') != MATCH_YES) | |
5343 | { | |
5344 | gfc_error ("Missing closing quote '\"' for binding label at %C"); | |
5345 | /* User started string with '"' so looked to match it. */ | |
5346 | return MATCH_ERROR; | |
5347 | } | |
5348 | } | |
5349 | else | |
5350 | { | |
5351 | if (gfc_match_char ('\'') != MATCH_YES) | |
5352 | { | |
5353 | gfc_error ("Missing closing quote '\'' for binding label at %C"); | |
5354 | /* User started string with "'" char. */ | |
5355 | return MATCH_ERROR; | |
5356 | } | |
5357 | } | |
5358 | } | |
5359 | ||
5360 | /* Get the required right paren. */ | |
5361 | if (gfc_match_char (')') != MATCH_YES) | |
5362 | { | |
5363 | gfc_error ("Missing closing paren for binding label at %C"); | |
5364 | return MATCH_ERROR; | |
5365 | } | |
5366 | ||
75ae7f6c | 5367 | if (has_name_equals && !allow_binding_name) |
5368 | { | |
5369 | gfc_error ("No binding name is allowed in BIND(C) at %C"); | |
5370 | return MATCH_ERROR; | |
5371 | } | |
5372 | ||
5373 | if (has_name_equals && sym != NULL && sym->attr.dummy) | |
5374 | { | |
5375 | gfc_error ("For dummy procedure %s, no binding name is " | |
5376 | "allowed in BIND(C) at %C", sym->name); | |
5377 | return MATCH_ERROR; | |
5378 | } | |
5379 | ||
5380 | ||
c5d33754 | 5381 | /* Save the binding label to the symbol. If sym is null, we're |
5382 | probably matching the typespec attributes of a declaration and | |
5383 | haven't gotten the name yet, and therefore, no symbol yet. */ | |
5384 | if (binding_label[0] != '\0') | |
5385 | { | |
5386 | if (sym != NULL) | |
5387 | { | |
b1223b39 | 5388 | strcpy (sym->binding_label, binding_label); |
c5d33754 | 5389 | } |
5390 | else | |
b1223b39 | 5391 | strcpy (curr_binding_label, binding_label); |
c5d33754 | 5392 | } |
75ae7f6c | 5393 | else if (allow_binding_name) |
c5d33754 | 5394 | { |
5395 | /* No binding label, but if symbol isn't null, we | |
75ae7f6c | 5396 | can set the label for it here. |
5397 | If name="" or allow_binding_name is false, no C binding name is | |
5398 | created. */ | |
c5d33754 | 5399 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) |
5400 | strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1); | |
5401 | } | |
94fa7146 | 5402 | |
5cf92482 | 5403 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
5404 | && current_interface.type == INTERFACE_ABSTRACT) | |
94fa7146 | 5405 | { |
5406 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); | |
5407 | return MATCH_ERROR; | |
5408 | } | |
5409 | ||
c5d33754 | 5410 | return MATCH_YES; |
5411 | } | |
5412 | ||
5413 | ||
231e961a | 5414 | /* Return nonzero if we're currently compiling a contained procedure. */ |
c0985832 | 5415 | |
5416 | static int | |
5417 | contained_procedure (void) | |
5418 | { | |
1c343287 | 5419 | gfc_state_data *s = gfc_state_stack; |
c0985832 | 5420 | |
1c343287 | 5421 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) |
5422 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) | |
5423 | return 1; | |
c0985832 | 5424 | |
5425 | return 0; | |
5426 | } | |
5427 | ||
e14bee04 | 5428 | /* Set the kind of each enumerator. The kind is selected such that it is |
3b6a4b41 | 5429 | interoperable with the corresponding C enumeration type, making |
5430 | sure that -fshort-enums is honored. */ | |
5431 | ||
5432 | static void | |
5433 | set_enum_kind(void) | |
5434 | { | |
5435 | enumerator_history *current_history = NULL; | |
5436 | int kind; | |
5437 | int i; | |
5438 | ||
5439 | if (max_enum == NULL || enum_history == NULL) | |
5440 | return; | |
5441 | ||
6f092e31 | 5442 | if (!flag_short_enums) |
e14bee04 | 5443 | return; |
5444 | ||
3b6a4b41 | 5445 | i = 0; |
5446 | do | |
5447 | { | |
5448 | kind = gfc_integer_kinds[i++].kind; | |
5449 | } | |
e14bee04 | 5450 | while (kind < gfc_c_int_kind |
3b6a4b41 | 5451 | && gfc_check_integer_range (max_enum->initializer->value.integer, |
5452 | kind) != ARITH_OK); | |
5453 | ||
5454 | current_history = enum_history; | |
5455 | while (current_history != NULL) | |
5456 | { | |
5457 | current_history->sym->ts.kind = kind; | |
5458 | current_history = current_history->next; | |
5459 | } | |
5460 | } | |
5461 | ||
1a9745d2 | 5462 | |
4ee9c684 | 5463 | /* Match any of the various end-block statements. Returns the type of |
6a7084d7 | 5464 | END to the caller. The END INTERFACE, END IF, END DO, END SELECT |
5465 | and END BLOCK statements cannot be replaced by a single END statement. */ | |
4ee9c684 | 5466 | |
5467 | match | |
1a9745d2 | 5468 | gfc_match_end (gfc_statement *st) |
4ee9c684 | 5469 | { |
5470 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5471 | gfc_compile_state state; | |
5472 | locus old_loc; | |
5473 | const char *block_name; | |
5474 | const char *target; | |
c0985832 | 5475 | int eos_ok; |
4ee9c684 | 5476 | match m; |
5477 | ||
cbb9e6aa | 5478 | old_loc = gfc_current_locus; |
4ee9c684 | 5479 | if (gfc_match ("end") != MATCH_YES) |
5480 | return MATCH_NO; | |
5481 | ||
5482 | state = gfc_current_state (); | |
1a9745d2 | 5483 | block_name = gfc_current_block () == NULL |
5484 | ? NULL : gfc_current_block ()->name; | |
4ee9c684 | 5485 | |
d18a512a | 5486 | switch (state) |
4ee9c684 | 5487 | { |
d18a512a | 5488 | case COMP_ASSOCIATE: |
5489 | case COMP_BLOCK: | |
5490 | if (!strcmp (block_name, "block@")) | |
5491 | block_name = NULL; | |
5492 | break; | |
5493 | ||
5494 | case COMP_CONTAINS: | |
5495 | case COMP_DERIVED_CONTAINS: | |
4ee9c684 | 5496 | state = gfc_state_stack->previous->state; |
1a9745d2 | 5497 | block_name = gfc_state_stack->previous->sym == NULL |
5498 | ? NULL : gfc_state_stack->previous->sym->name; | |
d18a512a | 5499 | break; |
5500 | ||
5501 | default: | |
5502 | break; | |
4ee9c684 | 5503 | } |
5504 | ||
5505 | switch (state) | |
5506 | { | |
5507 | case COMP_NONE: | |
5508 | case COMP_PROGRAM: | |
5509 | *st = ST_END_PROGRAM; | |
5510 | target = " program"; | |
c0985832 | 5511 | eos_ok = 1; |
4ee9c684 | 5512 | break; |
5513 | ||
5514 | case COMP_SUBROUTINE: | |
5515 | *st = ST_END_SUBROUTINE; | |
5516 | target = " subroutine"; | |
c0985832 | 5517 | eos_ok = !contained_procedure (); |
4ee9c684 | 5518 | break; |
5519 | ||
5520 | case COMP_FUNCTION: | |
5521 | *st = ST_END_FUNCTION; | |
5522 | target = " function"; | |
c0985832 | 5523 | eos_ok = !contained_procedure (); |
4ee9c684 | 5524 | break; |
5525 | ||
5526 | case COMP_BLOCK_DATA: | |
5527 | *st = ST_END_BLOCK_DATA; | |
5528 | target = " block data"; | |
c0985832 | 5529 | eos_ok = 1; |
4ee9c684 | 5530 | break; |
5531 | ||
5532 | case COMP_MODULE: | |
5533 | *st = ST_END_MODULE; | |
5534 | target = " module"; | |
c0985832 | 5535 | eos_ok = 1; |
4ee9c684 | 5536 | break; |
5537 | ||
5538 | case COMP_INTERFACE: | |
5539 | *st = ST_END_INTERFACE; | |
5540 | target = " interface"; | |
c0985832 | 5541 | eos_ok = 0; |
4ee9c684 | 5542 | break; |
5543 | ||
5544 | case COMP_DERIVED: | |
7fd88f6e | 5545 | case COMP_DERIVED_CONTAINS: |
4ee9c684 | 5546 | *st = ST_END_TYPE; |
5547 | target = " type"; | |
c0985832 | 5548 | eos_ok = 0; |
4ee9c684 | 5549 | break; |
5550 | ||
d18a512a | 5551 | case COMP_ASSOCIATE: |
5552 | *st = ST_END_ASSOCIATE; | |
5553 | target = " associate"; | |
5554 | eos_ok = 0; | |
5555 | break; | |
5556 | ||
6a7084d7 | 5557 | case COMP_BLOCK: |
5558 | *st = ST_END_BLOCK; | |
5559 | target = " block"; | |
5560 | eos_ok = 0; | |
5561 | break; | |
5562 | ||
4ee9c684 | 5563 | case COMP_IF: |
5564 | *st = ST_ENDIF; | |
5565 | target = " if"; | |
c0985832 | 5566 | eos_ok = 0; |
4ee9c684 | 5567 | break; |
5568 | ||
5569 | case COMP_DO: | |
5570 | *st = ST_ENDDO; | |
5571 | target = " do"; | |
c0985832 | 5572 | eos_ok = 0; |
4ee9c684 | 5573 | break; |
5574 | ||
c6cd3066 | 5575 | case COMP_CRITICAL: |
5576 | *st = ST_END_CRITICAL; | |
5577 | target = " critical"; | |
5578 | eos_ok = 0; | |
5579 | break; | |
5580 | ||
4ee9c684 | 5581 | case COMP_SELECT: |
1de1b1a9 | 5582 | case COMP_SELECT_TYPE: |
4ee9c684 | 5583 | *st = ST_END_SELECT; |
5584 | target = " select"; | |
c0985832 | 5585 | eos_ok = 0; |
4ee9c684 | 5586 | break; |
5587 | ||
5588 | case COMP_FORALL: | |
5589 | *st = ST_END_FORALL; | |
5590 | target = " forall"; | |
c0985832 | 5591 | eos_ok = 0; |
4ee9c684 | 5592 | break; |
5593 | ||
5594 | case COMP_WHERE: | |
5595 | *st = ST_END_WHERE; | |
5596 | target = " where"; | |
c0985832 | 5597 | eos_ok = 0; |
4ee9c684 | 5598 | break; |
5599 | ||
3b6a4b41 | 5600 | case COMP_ENUM: |
5601 | *st = ST_END_ENUM; | |
5602 | target = " enum"; | |
5603 | eos_ok = 0; | |
5604 | last_initializer = NULL; | |
5605 | set_enum_kind (); | |
5606 | gfc_free_enum_history (); | |
5607 | break; | |
5608 | ||
4ee9c684 | 5609 | default: |
5610 | gfc_error ("Unexpected END statement at %C"); | |
5611 | goto cleanup; | |
5612 | } | |
5613 | ||
5614 | if (gfc_match_eos () == MATCH_YES) | |
5615 | { | |
c0985832 | 5616 | if (!eos_ok) |
4ee9c684 | 5617 | { |
f6d0e37a | 5618 | /* We would have required END [something]. */ |
d197c9ee | 5619 | gfc_error ("%s statement expected at %L", |
5620 | gfc_ascii_statement (*st), &old_loc); | |
4ee9c684 | 5621 | goto cleanup; |
5622 | } | |
5623 | ||
5624 | return MATCH_YES; | |
5625 | } | |
5626 | ||
5627 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
5628 | if (gfc_match (target) != MATCH_YES) | |
5629 | { | |
5630 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
5631 | goto cleanup; | |
5632 | } | |
5633 | ||
5634 | /* If we're at the end, make sure a block name wasn't required. */ | |
5635 | if (gfc_match_eos () == MATCH_YES) | |
5636 | { | |
5637 | ||
0d0ce415 | 5638 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT |
c6cd3066 | 5639 | && *st != ST_END_FORALL && *st != ST_END_WHERE && *st != ST_END_BLOCK |
d18a512a | 5640 | && *st != ST_END_ASSOCIATE && *st != ST_END_CRITICAL) |
4ee9c684 | 5641 | return MATCH_YES; |
5642 | ||
6a7084d7 | 5643 | if (!block_name) |
4ee9c684 | 5644 | return MATCH_YES; |
5645 | ||
5646 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
5647 | block_name, gfc_ascii_statement (*st)); | |
5648 | ||
5649 | return MATCH_ERROR; | |
5650 | } | |
5651 | ||
5652 | /* END INTERFACE has a special handler for its several possible endings. */ | |
5653 | if (*st == ST_END_INTERFACE) | |
5654 | return gfc_match_end_interface (); | |
5655 | ||
f6d0e37a | 5656 | /* We haven't hit the end of statement, so what is left must be an |
5657 | end-name. */ | |
4ee9c684 | 5658 | m = gfc_match_space (); |
5659 | if (m == MATCH_YES) | |
5660 | m = gfc_match_name (name); | |
5661 | ||
5662 | if (m == MATCH_NO) | |
5663 | gfc_error ("Expected terminating name at %C"); | |
5664 | if (m != MATCH_YES) | |
5665 | goto cleanup; | |
5666 | ||
5667 | if (block_name == NULL) | |
5668 | goto syntax; | |
5669 | ||
1e057e9b | 5670 | if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0) |
4ee9c684 | 5671 | { |
5672 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
5673 | gfc_ascii_statement (*st)); | |
5674 | goto cleanup; | |
5675 | } | |
1e057e9b | 5676 | /* Procedure pointer as function result. */ |
5677 | else if (strcmp (block_name, "ppr@") == 0 | |
5678 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0) | |
5679 | { | |
5680 | gfc_error ("Expected label '%s' for %s statement at %C", | |
5681 | gfc_current_block ()->ns->proc_name->name, | |
5682 | gfc_ascii_statement (*st)); | |
5683 | goto cleanup; | |
5684 | } | |
4ee9c684 | 5685 | |
5686 | if (gfc_match_eos () == MATCH_YES) | |
5687 | return MATCH_YES; | |
5688 | ||
5689 | syntax: | |
5690 | gfc_syntax_error (*st); | |
5691 | ||
5692 | cleanup: | |
cbb9e6aa | 5693 | gfc_current_locus = old_loc; |
4ee9c684 | 5694 | return MATCH_ERROR; |
5695 | } | |
5696 | ||
5697 | ||
5698 | ||
5699 | /***************** Attribute declaration statements ****************/ | |
5700 | ||
5701 | /* Set the attribute of a single variable. */ | |
5702 | ||
5703 | static match | |
5704 | attr_decl1 (void) | |
5705 | { | |
5706 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5707 | gfc_array_spec *as; | |
5708 | gfc_symbol *sym; | |
5709 | locus var_locus; | |
5710 | match m; | |
5711 | ||
5712 | as = NULL; | |
5713 | ||
5714 | m = gfc_match_name (name); | |
5715 | if (m != MATCH_YES) | |
5716 | goto cleanup; | |
5717 | ||
36b0a1b0 | 5718 | if (find_special (name, &sym, false)) |
4ee9c684 | 5719 | return MATCH_ERROR; |
5720 | ||
cbb9e6aa | 5721 | var_locus = gfc_current_locus; |
4ee9c684 | 5722 | |
5723 | /* Deal with possible array specification for certain attributes. */ | |
5724 | if (current_attr.dimension | |
aff518b0 | 5725 | || current_attr.codimension |
4ee9c684 | 5726 | || current_attr.allocatable |
5727 | || current_attr.pointer | |
5728 | || current_attr.target) | |
5729 | { | |
aff518b0 | 5730 | m = gfc_match_array_spec (&as, !current_attr.codimension, |
5731 | !current_attr.dimension | |
5732 | && !current_attr.pointer | |
5733 | && !current_attr.target); | |
4ee9c684 | 5734 | if (m == MATCH_ERROR) |
5735 | goto cleanup; | |
5736 | ||
5737 | if (current_attr.dimension && m == MATCH_NO) | |
5738 | { | |
1a9745d2 | 5739 | gfc_error ("Missing array specification at %L in DIMENSION " |
5740 | "statement", &var_locus); | |
4ee9c684 | 5741 | m = MATCH_ERROR; |
5742 | goto cleanup; | |
5743 | } | |
5744 | ||
13aebeb0 | 5745 | if (current_attr.dimension && sym->value) |
5746 | { | |
5747 | gfc_error ("Dimensions specified for %s at %L after its " | |
5748 | "initialisation", sym->name, &var_locus); | |
5749 | m = MATCH_ERROR; | |
5750 | goto cleanup; | |
5751 | } | |
5752 | ||
aff518b0 | 5753 | if (current_attr.codimension && m == MATCH_NO) |
5754 | { | |
5755 | gfc_error ("Missing array specification at %L in CODIMENSION " | |
5756 | "statement", &var_locus); | |
5757 | m = MATCH_ERROR; | |
5758 | goto cleanup; | |
5759 | } | |
5760 | ||
4ee9c684 | 5761 | if ((current_attr.allocatable || current_attr.pointer) |
5762 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
5763 | { | |
1a9745d2 | 5764 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
4ee9c684 | 5765 | m = MATCH_ERROR; |
5766 | goto cleanup; | |
5767 | } | |
5768 | } | |
5769 | ||
b3704193 | 5770 | /* Update symbol table. DIMENSION attribute is set in |
5771 | gfc_set_array_spec(). For CLASS variables, this must be applied | |
5772 | to the first component, or '$data' field. */ | |
50b4b37b | 5773 | if (sym->ts.type == BT_CLASS) |
4ee9c684 | 5774 | { |
50b4b37b | 5775 | if (gfc_copy_attr (&CLASS_DATA (sym)->attr, ¤t_attr,&var_locus) |
5776 | == FAILURE) | |
b3704193 | 5777 | { |
5778 | m = MATCH_ERROR; | |
5779 | goto cleanup; | |
5780 | } | |
50b4b37b | 5781 | sym->attr.class_ok = (sym->attr.class_ok || current_attr.allocatable |
5782 | || current_attr.pointer); | |
b3704193 | 5783 | } |
5784 | else | |
5785 | { | |
aff518b0 | 5786 | if (current_attr.dimension == 0 && current_attr.codimension == 0 |
5787 | && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE) | |
b3704193 | 5788 | { |
5789 | m = MATCH_ERROR; | |
5790 | goto cleanup; | |
5791 | } | |
4ee9c684 | 5792 | } |
5793 | ||
5794 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
5795 | { | |
5796 | m = MATCH_ERROR; | |
5797 | goto cleanup; | |
5798 | } | |
e14bee04 | 5799 | |
b549d2a5 | 5800 | if (sym->attr.cray_pointee && sym->as != NULL) |
5801 | { | |
5802 | /* Fix the array spec. */ | |
5803 | m = gfc_mod_pointee_as (sym->as); | |
5804 | if (m == MATCH_ERROR) | |
5805 | goto cleanup; | |
5806 | } | |
4ee9c684 | 5807 | |
25dd7350 | 5808 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
14efb9b7 | 5809 | { |
5810 | m = MATCH_ERROR; | |
5811 | goto cleanup; | |
5812 | } | |
5813 | ||
4ee9c684 | 5814 | if ((current_attr.external || current_attr.intrinsic) |
5815 | && sym->attr.flavor != FL_PROCEDURE | |
950683ed | 5816 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
4ee9c684 | 5817 | { |
5818 | m = MATCH_ERROR; | |
5819 | goto cleanup; | |
5820 | } | |
5821 | ||
1e057e9b | 5822 | add_hidden_procptr_result (sym); |
5823 | ||
4ee9c684 | 5824 | return MATCH_YES; |
5825 | ||
5826 | cleanup: | |
5827 | gfc_free_array_spec (as); | |
5828 | return m; | |
5829 | } | |
5830 | ||
5831 | ||
5832 | /* Generic attribute declaration subroutine. Used for attributes that | |
5833 | just have a list of names. */ | |
5834 | ||
5835 | static match | |
5836 | attr_decl (void) | |
5837 | { | |
5838 | match m; | |
5839 | ||
5840 | /* Gobble the optional double colon, by simply ignoring the result | |
5841 | of gfc_match(). */ | |
5842 | gfc_match (" ::"); | |
5843 | ||
5844 | for (;;) | |
5845 | { | |
5846 | m = attr_decl1 (); | |
5847 | if (m != MATCH_YES) | |
5848 | break; | |
5849 | ||
5850 | if (gfc_match_eos () == MATCH_YES) | |
5851 | { | |
5852 | m = MATCH_YES; | |
5853 | break; | |
5854 | } | |
5855 | ||
5856 | if (gfc_match_char (',') != MATCH_YES) | |
5857 | { | |
5858 | gfc_error ("Unexpected character in variable list at %C"); | |
5859 | m = MATCH_ERROR; | |
5860 | break; | |
5861 | } | |
5862 | } | |
5863 | ||
5864 | return m; | |
5865 | } | |
5866 | ||
5867 | ||
b549d2a5 | 5868 | /* This routine matches Cray Pointer declarations of the form: |
5869 | pointer ( <pointer>, <pointee> ) | |
5870 | or | |
e14bee04 | 5871 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
5872 | The pointer, if already declared, should be an integer. Otherwise, we | |
b549d2a5 | 5873 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
5874 | be either a scalar, or an array declaration. No space is allocated for | |
e14bee04 | 5875 | the pointee. For the statement |
b549d2a5 | 5876 | pointer (ipt, ar(10)) |
5877 | any subsequent uses of ar will be translated (in C-notation) as | |
e14bee04 | 5878 | ar(i) => ((<type> *) ipt)(i) |
b7bf3f81 | 5879 | After gimplification, pointee variable will disappear in the code. */ |
b549d2a5 | 5880 | |
5881 | static match | |
5882 | cray_pointer_decl (void) | |
5883 | { | |
5884 | match m; | |
aff518b0 | 5885 | gfc_array_spec *as = NULL; |
b549d2a5 | 5886 | gfc_symbol *cptr; /* Pointer symbol. */ |
5887 | gfc_symbol *cpte; /* Pointee symbol. */ | |
5888 | locus var_locus; | |
5889 | bool done = false; | |
5890 | ||
5891 | while (!done) | |
5892 | { | |
5893 | if (gfc_match_char ('(') != MATCH_YES) | |
5894 | { | |
5895 | gfc_error ("Expected '(' at %C"); | |
e14bee04 | 5896 | return MATCH_ERROR; |
b549d2a5 | 5897 | } |
e14bee04 | 5898 | |
b549d2a5 | 5899 | /* Match pointer. */ |
5900 | var_locus = gfc_current_locus; | |
5901 | gfc_clear_attr (¤t_attr); | |
5902 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
5903 | current_ts.type = BT_INTEGER; | |
5904 | current_ts.kind = gfc_index_integer_kind; | |
5905 | ||
e14bee04 | 5906 | m = gfc_match_symbol (&cptr, 0); |
b549d2a5 | 5907 | if (m != MATCH_YES) |
5908 | { | |
5909 | gfc_error ("Expected variable name at %C"); | |
5910 | return m; | |
5911 | } | |
e14bee04 | 5912 | |
b549d2a5 | 5913 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) |
5914 | return MATCH_ERROR; | |
5915 | ||
e14bee04 | 5916 | gfc_set_sym_referenced (cptr); |
b549d2a5 | 5917 | |
5918 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
5919 | { | |
5920 | cptr->ts.type = BT_INTEGER; | |
e14bee04 | 5921 | cptr->ts.kind = gfc_index_integer_kind; |
b549d2a5 | 5922 | } |
5923 | else if (cptr->ts.type != BT_INTEGER) | |
5924 | { | |
7698a624 | 5925 | gfc_error ("Cray pointer at %C must be an integer"); |
b549d2a5 | 5926 | return MATCH_ERROR; |
5927 | } | |
5928 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
5929 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
7698a624 | 5930 | " memory addresses require %d bytes", |
1a9745d2 | 5931 | cptr->ts.kind, gfc_index_integer_kind); |
b549d2a5 | 5932 | |
5933 | if (gfc_match_char (',') != MATCH_YES) | |
5934 | { | |
5935 | gfc_error ("Expected \",\" at %C"); | |
e14bee04 | 5936 | return MATCH_ERROR; |
b549d2a5 | 5937 | } |
5938 | ||
e14bee04 | 5939 | /* Match Pointee. */ |
b549d2a5 | 5940 | var_locus = gfc_current_locus; |
5941 | gfc_clear_attr (¤t_attr); | |
5942 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
5943 | current_ts.type = BT_UNKNOWN; | |
5944 | current_ts.kind = 0; | |
5945 | ||
5946 | m = gfc_match_symbol (&cpte, 0); | |
5947 | if (m != MATCH_YES) | |
5948 | { | |
5949 | gfc_error ("Expected variable name at %C"); | |
5950 | return m; | |
5951 | } | |
e14bee04 | 5952 | |
b549d2a5 | 5953 | /* Check for an optional array spec. */ |
aff518b0 | 5954 | m = gfc_match_array_spec (&as, true, false); |
b549d2a5 | 5955 | if (m == MATCH_ERROR) |
5956 | { | |
5957 | gfc_free_array_spec (as); | |
5958 | return m; | |
5959 | } | |
5960 | else if (m == MATCH_NO) | |
5961 | { | |
5962 | gfc_free_array_spec (as); | |
5963 | as = NULL; | |
5964 | } | |
5965 | ||
5966 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
5967 | return MATCH_ERROR; | |
5968 | ||
5969 | gfc_set_sym_referenced (cpte); | |
5970 | ||
5971 | if (cpte->as == NULL) | |
5972 | { | |
5973 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
5974 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
5975 | } | |
5976 | else if (as != NULL) | |
5977 | { | |
7698a624 | 5978 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
b549d2a5 | 5979 | gfc_free_array_spec (as); |
5980 | return MATCH_ERROR; | |
5981 | } | |
5982 | ||
5983 | as = NULL; | |
5984 | ||
5985 | if (cpte->as != NULL) | |
5986 | { | |
5987 | /* Fix array spec. */ | |
5988 | m = gfc_mod_pointee_as (cpte->as); | |
5989 | if (m == MATCH_ERROR) | |
5990 | return m; | |
5991 | } | |
5992 | ||
5993 | /* Point the Pointee at the Pointer. */ | |
b7bf3f81 | 5994 | cpte->cp_pointer = cptr; |
b549d2a5 | 5995 | |
5996 | if (gfc_match_char (')') != MATCH_YES) | |
5997 | { | |
5998 | gfc_error ("Expected \")\" at %C"); | |
5999 | return MATCH_ERROR; | |
6000 | } | |
6001 | m = gfc_match_char (','); | |
6002 | if (m != MATCH_YES) | |
6003 | done = true; /* Stop searching for more declarations. */ | |
6004 | ||
6005 | } | |
6006 | ||
6007 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
6008 | || gfc_match_eos () != MATCH_YES) | |
6009 | { | |
6010 | gfc_error ("Expected \",\" or end of statement at %C"); | |
6011 | return MATCH_ERROR; | |
6012 | } | |
6013 | return MATCH_YES; | |
6014 | } | |
6015 | ||
6016 | ||
4ee9c684 | 6017 | match |
6018 | gfc_match_external (void) | |
6019 | { | |
6020 | ||
6021 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 6022 | current_attr.external = 1; |
4ee9c684 | 6023 | |
6024 | return attr_decl (); | |
6025 | } | |
6026 | ||
6027 | ||
4ee9c684 | 6028 | match |
6029 | gfc_match_intent (void) | |
6030 | { | |
6031 | sym_intent intent; | |
6032 | ||
6a7084d7 | 6033 | /* This is not allowed within a BLOCK construct! */ |
6034 | if (gfc_current_state () == COMP_BLOCK) | |
6035 | { | |
6036 | gfc_error ("INTENT is not allowed inside of BLOCK at %C"); | |
6037 | return MATCH_ERROR; | |
6038 | } | |
6039 | ||
4ee9c684 | 6040 | intent = match_intent_spec (); |
6041 | if (intent == INTENT_UNKNOWN) | |
6042 | return MATCH_ERROR; | |
6043 | ||
6044 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 6045 | current_attr.intent = intent; |
4ee9c684 | 6046 | |
6047 | return attr_decl (); | |
6048 | } | |
6049 | ||
6050 | ||
6051 | match | |
6052 | gfc_match_intrinsic (void) | |
6053 | { | |
6054 | ||
6055 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 6056 | current_attr.intrinsic = 1; |
4ee9c684 | 6057 | |
6058 | return attr_decl (); | |
6059 | } | |
6060 | ||
6061 | ||
6062 | match | |
6063 | gfc_match_optional (void) | |
6064 | { | |
6a7084d7 | 6065 | /* This is not allowed within a BLOCK construct! */ |
6066 | if (gfc_current_state () == COMP_BLOCK) | |
6067 | { | |
6068 | gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C"); | |
6069 | return MATCH_ERROR; | |
6070 | } | |
4ee9c684 | 6071 | |
6072 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 6073 | current_attr.optional = 1; |
4ee9c684 | 6074 | |
6075 | return attr_decl (); | |
6076 | } | |
6077 | ||
6078 | ||
6079 | match | |
6080 | gfc_match_pointer (void) | |
6081 | { | |
b549d2a5 | 6082 | gfc_gobble_whitespace (); |
e0be6f02 | 6083 | if (gfc_peek_ascii_char () == '(') |
b549d2a5 | 6084 | { |
6085 | if (!gfc_option.flag_cray_pointer) | |
6086 | { | |
1a9745d2 | 6087 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
6088 | "flag"); | |
b549d2a5 | 6089 | return MATCH_ERROR; |
6090 | } | |
6091 | return cray_pointer_decl (); | |
6092 | } | |
6093 | else | |
6094 | { | |
6095 | gfc_clear_attr (¤t_attr); | |
14efb9b7 | 6096 | current_attr.pointer = 1; |
b549d2a5 | 6097 | |
6098 | return attr_decl (); | |
6099 | } | |
4ee9c684 | 6100 | } |
6101 | ||
6102 | ||
6103 | match | |
6104 | gfc_match_allocatable (void) | |
6105 | { | |
4ee9c684 | 6106 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 6107 | current_attr.allocatable = 1; |
4ee9c684 | 6108 | |
6109 | return attr_decl (); | |
6110 | } | |
6111 | ||
6112 | ||
aff518b0 | 6113 | match |
6114 | gfc_match_codimension (void) | |
6115 | { | |
6116 | gfc_clear_attr (¤t_attr); | |
6117 | current_attr.codimension = 1; | |
6118 | ||
6119 | return attr_decl (); | |
6120 | } | |
6121 | ||
6122 | ||
4ee9c684 | 6123 | match |
6124 | gfc_match_dimension (void) | |
6125 | { | |
4ee9c684 | 6126 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 6127 | current_attr.dimension = 1; |
4ee9c684 | 6128 | |
6129 | return attr_decl (); | |
6130 | } | |
6131 | ||
6132 | ||
6133 | match | |
6134 | gfc_match_target (void) | |
6135 | { | |
4ee9c684 | 6136 | gfc_clear_attr (¤t_attr); |
14efb9b7 | 6137 | current_attr.target = 1; |
4ee9c684 | 6138 | |
6139 | return attr_decl (); | |
6140 | } | |
6141 | ||
6142 | ||
6143 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
6144 | statement. */ | |
6145 | ||
6146 | static match | |
6147 | access_attr_decl (gfc_statement st) | |
6148 | { | |
6149 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6150 | interface_type type; | |
6151 | gfc_user_op *uop; | |
6152 | gfc_symbol *sym; | |
dcb1b019 | 6153 | gfc_intrinsic_op op; |
4ee9c684 | 6154 | match m; |
6155 | ||
6156 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6157 | goto done; | |
6158 | ||
6159 | for (;;) | |
6160 | { | |
dcb1b019 | 6161 | m = gfc_match_generic_spec (&type, name, &op); |
4ee9c684 | 6162 | if (m == MATCH_NO) |
6163 | goto syntax; | |
6164 | if (m == MATCH_ERROR) | |
6165 | return MATCH_ERROR; | |
6166 | ||
6167 | switch (type) | |
6168 | { | |
6169 | case INTERFACE_NAMELESS: | |
94fa7146 | 6170 | case INTERFACE_ABSTRACT: |
4ee9c684 | 6171 | goto syntax; |
6172 | ||
6173 | case INTERFACE_GENERIC: | |
6174 | if (gfc_get_symbol (name, NULL, &sym)) | |
6175 | goto done; | |
6176 | ||
1a9745d2 | 6177 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
6178 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
950683ed | 6179 | sym->name, NULL) == FAILURE) |
4ee9c684 | 6180 | return MATCH_ERROR; |
6181 | ||
6182 | break; | |
6183 | ||
6184 | case INTERFACE_INTRINSIC_OP: | |
dcb1b019 | 6185 | if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN) |
4ee9c684 | 6186 | { |
dcb1b019 | 6187 | gfc_current_ns->operator_access[op] = |
4ee9c684 | 6188 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; |
6189 | } | |
6190 | else | |
6191 | { | |
6192 | gfc_error ("Access specification of the %s operator at %C has " | |
dcb1b019 | 6193 | "already been specified", gfc_op2string (op)); |
4ee9c684 | 6194 | goto done; |
6195 | } | |
6196 | ||
6197 | break; | |
6198 | ||
6199 | case INTERFACE_USER_OP: | |
6200 | uop = gfc_get_uop (name); | |
6201 | ||
6202 | if (uop->access == ACCESS_UNKNOWN) | |
6203 | { | |
1a9745d2 | 6204 | uop->access = (st == ST_PUBLIC) |
6205 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
4ee9c684 | 6206 | } |
6207 | else | |
6208 | { | |
1a9745d2 | 6209 | gfc_error ("Access specification of the .%s. operator at %C " |
6210 | "has already been specified", sym->name); | |
4ee9c684 | 6211 | goto done; |
6212 | } | |
6213 | ||
6214 | break; | |
6215 | } | |
6216 | ||
6217 | if (gfc_match_char (',') == MATCH_NO) | |
6218 | break; | |
6219 | } | |
6220 | ||
6221 | if (gfc_match_eos () != MATCH_YES) | |
6222 | goto syntax; | |
6223 | return MATCH_YES; | |
6224 | ||
6225 | syntax: | |
6226 | gfc_syntax_error (st); | |
6227 | ||
6228 | done: | |
6229 | return MATCH_ERROR; | |
6230 | } | |
6231 | ||
6232 | ||
3ea52af3 | 6233 | match |
6234 | gfc_match_protected (void) | |
6235 | { | |
6236 | gfc_symbol *sym; | |
6237 | match m; | |
6238 | ||
6239 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
6240 | { | |
6241 | gfc_error ("PROTECTED at %C only allowed in specification " | |
6242 | "part of a module"); | |
6243 | return MATCH_ERROR; | |
6244 | ||
6245 | } | |
6246 | ||
1a9745d2 | 6247 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
3ea52af3 | 6248 | == FAILURE) |
6249 | return MATCH_ERROR; | |
6250 | ||
6251 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6252 | { | |
6253 | return MATCH_ERROR; | |
6254 | } | |
6255 | ||
6256 | if (gfc_match_eos () == MATCH_YES) | |
6257 | goto syntax; | |
6258 | ||
6259 | for(;;) | |
6260 | { | |
6261 | m = gfc_match_symbol (&sym, 0); | |
6262 | switch (m) | |
6263 | { | |
6264 | case MATCH_YES: | |
1a9745d2 | 6265 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
6266 | == FAILURE) | |
3ea52af3 | 6267 | return MATCH_ERROR; |
6268 | goto next_item; | |
6269 | ||
6270 | case MATCH_NO: | |
6271 | break; | |
6272 | ||
6273 | case MATCH_ERROR: | |
6274 | return MATCH_ERROR; | |
6275 | } | |
6276 | ||
6277 | next_item: | |
6278 | if (gfc_match_eos () == MATCH_YES) | |
6279 | break; | |
6280 | if (gfc_match_char (',') != MATCH_YES) | |
6281 | goto syntax; | |
6282 | } | |
6283 | ||
6284 | return MATCH_YES; | |
6285 | ||
6286 | syntax: | |
6287 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
6288 | return MATCH_ERROR; | |
6289 | } | |
6290 | ||
6291 | ||
a0527218 | 6292 | /* The PRIVATE statement is a bit weird in that it can be an attribute |
69b1505f | 6293 | declaration, but also works as a standalone statement inside of a |
4ee9c684 | 6294 | type declaration or a module. */ |
6295 | ||
6296 | match | |
1a9745d2 | 6297 | gfc_match_private (gfc_statement *st) |
4ee9c684 | 6298 | { |
6299 | ||
6300 | if (gfc_match ("private") != MATCH_YES) | |
6301 | return MATCH_NO; | |
6302 | ||
e14bee04 | 6303 | if (gfc_current_state () != COMP_MODULE |
7fd88f6e | 6304 | && !(gfc_current_state () == COMP_DERIVED |
6305 | && gfc_state_stack->previous | |
6306 | && gfc_state_stack->previous->state == COMP_MODULE) | |
6307 | && !(gfc_current_state () == COMP_DERIVED_CONTAINS | |
6308 | && gfc_state_stack->previous && gfc_state_stack->previous->previous | |
6309 | && gfc_state_stack->previous->previous->state == COMP_MODULE)) | |
e14bee04 | 6310 | { |
6311 | gfc_error ("PRIVATE statement at %C is only allowed in the " | |
6312 | "specification part of a module"); | |
6313 | return MATCH_ERROR; | |
6314 | } | |
6315 | ||
4ee9c684 | 6316 | if (gfc_current_state () == COMP_DERIVED) |
6317 | { | |
6318 | if (gfc_match_eos () == MATCH_YES) | |
6319 | { | |
6320 | *st = ST_PRIVATE; | |
6321 | return MATCH_YES; | |
6322 | } | |
6323 | ||
6324 | gfc_syntax_error (ST_PRIVATE); | |
6325 | return MATCH_ERROR; | |
6326 | } | |
6327 | ||
6328 | if (gfc_match_eos () == MATCH_YES) | |
6329 | { | |
6330 | *st = ST_PRIVATE; | |
6331 | return MATCH_YES; | |
6332 | } | |
6333 | ||
6334 | *st = ST_ATTR_DECL; | |
6335 | return access_attr_decl (ST_PRIVATE); | |
6336 | } | |
6337 | ||
6338 | ||
6339 | match | |
1a9745d2 | 6340 | gfc_match_public (gfc_statement *st) |
4ee9c684 | 6341 | { |
6342 | ||
6343 | if (gfc_match ("public") != MATCH_YES) | |
6344 | return MATCH_NO; | |
6345 | ||
e14bee04 | 6346 | if (gfc_current_state () != COMP_MODULE) |
6347 | { | |
6348 | gfc_error ("PUBLIC statement at %C is only allowed in the " | |
6349 | "specification part of a module"); | |
6350 | return MATCH_ERROR; | |
6351 | } | |
6352 | ||
4ee9c684 | 6353 | if (gfc_match_eos () == MATCH_YES) |
6354 | { | |
6355 | *st = ST_PUBLIC; | |
6356 | return MATCH_YES; | |
6357 | } | |
6358 | ||
6359 | *st = ST_ATTR_DECL; | |
6360 | return access_attr_decl (ST_PUBLIC); | |
6361 | } | |
6362 | ||
6363 | ||
6364 | /* Workhorse for gfc_match_parameter. */ | |
6365 | ||
6366 | static match | |
6367 | do_parm (void) | |
6368 | { | |
6369 | gfc_symbol *sym; | |
6370 | gfc_expr *init; | |
6371 | match m; | |
f16404e3 | 6372 | gfc_try t; |
4ee9c684 | 6373 | |
6374 | m = gfc_match_symbol (&sym, 0); | |
6375 | if (m == MATCH_NO) | |
6376 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
6377 | ||
6378 | if (m != MATCH_YES) | |
6379 | return m; | |
6380 | ||
6381 | if (gfc_match_char ('=') == MATCH_NO) | |
6382 | { | |
6383 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
6384 | return MATCH_ERROR; | |
6385 | } | |
6386 | ||
6387 | m = gfc_match_init_expr (&init); | |
6388 | if (m == MATCH_NO) | |
6389 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
6390 | if (m != MATCH_YES) | |
6391 | return m; | |
6392 | ||
6393 | if (sym->ts.type == BT_UNKNOWN | |
6394 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
6395 | { | |
6396 | m = MATCH_ERROR; | |
6397 | goto cleanup; | |
6398 | } | |
6399 | ||
6400 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
950683ed | 6401 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
4ee9c684 | 6402 | { |
6403 | m = MATCH_ERROR; | |
6404 | goto cleanup; | |
6405 | } | |
6406 | ||
13aebeb0 | 6407 | if (sym->value) |
6408 | { | |
6409 | gfc_error ("Initializing already initialized variable at %C"); | |
6410 | m = MATCH_ERROR; | |
6411 | goto cleanup; | |
6412 | } | |
6413 | ||
f16404e3 | 6414 | t = add_init_expr_to_sym (sym->name, &init, &gfc_current_locus); |
6415 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
4ee9c684 | 6416 | |
6417 | cleanup: | |
6418 | gfc_free_expr (init); | |
6419 | return m; | |
6420 | } | |
6421 | ||
6422 | ||
6423 | /* Match a parameter statement, with the weird syntax that these have. */ | |
6424 | ||
6425 | match | |
6426 | gfc_match_parameter (void) | |
6427 | { | |
6428 | match m; | |
6429 | ||
6430 | if (gfc_match_char ('(') == MATCH_NO) | |
6431 | return MATCH_NO; | |
6432 | ||
6433 | for (;;) | |
6434 | { | |
6435 | m = do_parm (); | |
6436 | if (m != MATCH_YES) | |
6437 | break; | |
6438 | ||
6439 | if (gfc_match (" )%t") == MATCH_YES) | |
6440 | break; | |
6441 | ||
6442 | if (gfc_match_char (',') != MATCH_YES) | |
6443 | { | |
6444 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
6445 | m = MATCH_ERROR; | |
6446 | break; | |
6447 | } | |
6448 | } | |
6449 | ||
6450 | return m; | |
6451 | } | |
6452 | ||
6453 | ||
6454 | /* Save statements have a special syntax. */ | |
6455 | ||
6456 | match | |
6457 | gfc_match_save (void) | |
6458 | { | |
82f5ee13 | 6459 | char n[GFC_MAX_SYMBOL_LEN+1]; |
6460 | gfc_common_head *c; | |
4ee9c684 | 6461 | gfc_symbol *sym; |
6462 | match m; | |
6463 | ||
6464 | if (gfc_match_eos () == MATCH_YES) | |
6465 | { | |
6466 | if (gfc_current_ns->seen_save) | |
6467 | { | |
1a9745d2 | 6468 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
6469 | "follows previous SAVE statement") | |
76e82f95 | 6470 | == FAILURE) |
6471 | return MATCH_ERROR; | |
4ee9c684 | 6472 | } |
6473 | ||
6474 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
6475 | return MATCH_YES; | |
6476 | } | |
6477 | ||
6478 | if (gfc_current_ns->save_all) | |
6479 | { | |
1a9745d2 | 6480 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
6481 | "blanket SAVE statement") | |
76e82f95 | 6482 | == FAILURE) |
6483 | return MATCH_ERROR; | |
4ee9c684 | 6484 | } |
6485 | ||
6486 | gfc_match (" ::"); | |
6487 | ||
6488 | for (;;) | |
6489 | { | |
6490 | m = gfc_match_symbol (&sym, 0); | |
6491 | switch (m) | |
6492 | { | |
6493 | case MATCH_YES: | |
1a9745d2 | 6494 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
6495 | == FAILURE) | |
4ee9c684 | 6496 | return MATCH_ERROR; |
6497 | goto next_item; | |
6498 | ||
6499 | case MATCH_NO: | |
6500 | break; | |
6501 | ||
6502 | case MATCH_ERROR: | |
6503 | return MATCH_ERROR; | |
6504 | } | |
6505 | ||
82f5ee13 | 6506 | m = gfc_match (" / %n /", &n); |
4ee9c684 | 6507 | if (m == MATCH_ERROR) |
6508 | return MATCH_ERROR; | |
6509 | if (m == MATCH_NO) | |
6510 | goto syntax; | |
6511 | ||
403ddc45 | 6512 | c = gfc_get_common (n, 0); |
82f5ee13 | 6513 | c->saved = 1; |
6514 | ||
4ee9c684 | 6515 | gfc_current_ns->seen_save = 1; |
6516 | ||
6517 | next_item: | |
6518 | if (gfc_match_eos () == MATCH_YES) | |
6519 | break; | |
6520 | if (gfc_match_char (',') != MATCH_YES) | |
6521 | goto syntax; | |
6522 | } | |
6523 | ||
6524 | return MATCH_YES; | |
6525 | ||
6526 | syntax: | |
6527 | gfc_error ("Syntax error in SAVE statement at %C"); | |
6528 | return MATCH_ERROR; | |
6529 | } | |
6530 | ||
6531 | ||
8f6339b6 | 6532 | match |
6533 | gfc_match_value (void) | |
6534 | { | |
6535 | gfc_symbol *sym; | |
6536 | match m; | |
6537 | ||
6a7084d7 | 6538 | /* This is not allowed within a BLOCK construct! */ |
6539 | if (gfc_current_state () == COMP_BLOCK) | |
6540 | { | |
6541 | gfc_error ("VALUE is not allowed inside of BLOCK at %C"); | |
6542 | return MATCH_ERROR; | |
6543 | } | |
6544 | ||
1a9745d2 | 6545 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
8f6339b6 | 6546 | == FAILURE) |
6547 | return MATCH_ERROR; | |
6548 | ||
6549 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6550 | { | |
6551 | return MATCH_ERROR; | |
6552 | } | |
6553 | ||
6554 | if (gfc_match_eos () == MATCH_YES) | |
6555 | goto syntax; | |
6556 | ||
6557 | for(;;) | |
6558 | { | |
6559 | m = gfc_match_symbol (&sym, 0); | |
6560 | switch (m) | |
6561 | { | |
6562 | case MATCH_YES: | |
1a9745d2 | 6563 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
6564 | == FAILURE) | |
8f6339b6 | 6565 | return MATCH_ERROR; |
6566 | goto next_item; | |
6567 | ||
6568 | case MATCH_NO: | |
6569 | break; | |
6570 | ||
6571 | case MATCH_ERROR: | |
6572 | return MATCH_ERROR; | |
6573 | } | |
6574 | ||
6575 | next_item: | |
6576 | if (gfc_match_eos () == MATCH_YES) | |
6577 | break; | |
6578 | if (gfc_match_char (',') != MATCH_YES) | |
6579 | goto syntax; | |
6580 | } | |
6581 | ||
6582 | return MATCH_YES; | |
6583 | ||
6584 | syntax: | |
6585 | gfc_error ("Syntax error in VALUE statement at %C"); | |
6586 | return MATCH_ERROR; | |
6587 | } | |
6588 | ||
f6d0e37a | 6589 | |
ef814c81 | 6590 | match |
6591 | gfc_match_volatile (void) | |
6592 | { | |
6593 | gfc_symbol *sym; | |
6594 | match m; | |
6595 | ||
1a9745d2 | 6596 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
ef814c81 | 6597 | == FAILURE) |
6598 | return MATCH_ERROR; | |
6599 | ||
6600 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6601 | { | |
6602 | return MATCH_ERROR; | |
6603 | } | |
6604 | ||
6605 | if (gfc_match_eos () == MATCH_YES) | |
6606 | goto syntax; | |
6607 | ||
6608 | for(;;) | |
6609 | { | |
2f241857 | 6610 | /* VOLATILE is special because it can be added to host-associated |
aff518b0 | 6611 | symbols locally. Except for coarrays. */ |
2f241857 | 6612 | m = gfc_match_symbol (&sym, 1); |
ef814c81 | 6613 | switch (m) |
6614 | { | |
6615 | case MATCH_YES: | |
aff518b0 | 6616 | /* F2008, C560+C561. VOLATILE for host-/use-associated variable or |
6617 | for variable in a BLOCK which is defined outside of the BLOCK. */ | |
6618 | if (sym->ns != gfc_current_ns && sym->attr.codimension) | |
6619 | { | |
6620 | gfc_error ("Specifying VOLATILE for coarray variable '%s' at " | |
6621 | "%C, which is use-/host-associated", sym->name); | |
6622 | return MATCH_ERROR; | |
6623 | } | |
1a9745d2 | 6624 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
6625 | == FAILURE) | |
ef814c81 | 6626 | return MATCH_ERROR; |
6627 | goto next_item; | |
6628 | ||
6629 | case MATCH_NO: | |
6630 | break; | |
6631 | ||
6632 | case MATCH_ERROR: | |
6633 | return MATCH_ERROR; | |
6634 | } | |
6635 | ||
6636 | next_item: | |
6637 | if (gfc_match_eos () == MATCH_YES) | |
6638 | break; | |
6639 | if (gfc_match_char (',') != MATCH_YES) | |
6640 | goto syntax; | |
6641 | } | |
6642 | ||
6643 | return MATCH_YES; | |
6644 | ||
6645 | syntax: | |
6646 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
6647 | return MATCH_ERROR; | |
6648 | } | |
6649 | ||
6650 | ||
738928be | 6651 | match |
6652 | gfc_match_asynchronous (void) | |
6653 | { | |
6654 | gfc_symbol *sym; | |
6655 | match m; | |
6656 | ||
6657 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS statement at %C") | |
6658 | == FAILURE) | |
6659 | return MATCH_ERROR; | |
6660 | ||
6661 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6662 | { | |
6663 | return MATCH_ERROR; | |
6664 | } | |
6665 | ||
6666 | if (gfc_match_eos () == MATCH_YES) | |
6667 | goto syntax; | |
6668 | ||
6669 | for(;;) | |
6670 | { | |
6671 | /* ASYNCHRONOUS is special because it can be added to host-associated | |
6672 | symbols locally. */ | |
6673 | m = gfc_match_symbol (&sym, 1); | |
6674 | switch (m) | |
6675 | { | |
6676 | case MATCH_YES: | |
6677 | if (gfc_add_asynchronous (&sym->attr, sym->name, &gfc_current_locus) | |
6678 | == FAILURE) | |
6679 | return MATCH_ERROR; | |
6680 | goto next_item; | |
6681 | ||
6682 | case MATCH_NO: | |
6683 | break; | |
6684 | ||
6685 | case MATCH_ERROR: | |
6686 | return MATCH_ERROR; | |
6687 | } | |
6688 | ||
6689 | next_item: | |
6690 | if (gfc_match_eos () == MATCH_YES) | |
6691 | break; | |
6692 | if (gfc_match_char (',') != MATCH_YES) | |
6693 | goto syntax; | |
6694 | } | |
6695 | ||
6696 | return MATCH_YES; | |
6697 | ||
6698 | syntax: | |
6699 | gfc_error ("Syntax error in ASYNCHRONOUS statement at %C"); | |
6700 | return MATCH_ERROR; | |
6701 | } | |
6702 | ||
6703 | ||
4ee9c684 | 6704 | /* Match a module procedure statement. Note that we have to modify |
6705 | symbols in the parent's namespace because the current one was there | |
89d91d02 | 6706 | to receive symbols that are in an interface's formal argument list. */ |
4ee9c684 | 6707 | |
6708 | match | |
6709 | gfc_match_modproc (void) | |
6710 | { | |
6711 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6712 | gfc_symbol *sym; | |
6713 | match m; | |
63d42079 | 6714 | gfc_namespace *module_ns; |
94ce9f74 | 6715 | gfc_interface *old_interface_head, *interface; |
4ee9c684 | 6716 | |
6717 | if (gfc_state_stack->state != COMP_INTERFACE | |
6718 | || gfc_state_stack->previous == NULL | |
5cf92482 | 6719 | || current_interface.type == INTERFACE_NAMELESS |
6720 | || current_interface.type == INTERFACE_ABSTRACT) | |
4ee9c684 | 6721 | { |
1a9745d2 | 6722 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
6723 | "interface"); | |
4ee9c684 | 6724 | return MATCH_ERROR; |
6725 | } | |
6726 | ||
63d42079 | 6727 | module_ns = gfc_current_ns->parent; |
6728 | for (; module_ns; module_ns = module_ns->parent) | |
15ca3865 | 6729 | if (module_ns->proc_name->attr.flavor == FL_MODULE |
6730 | || module_ns->proc_name->attr.flavor == FL_PROGRAM | |
6731 | || (module_ns->proc_name->attr.flavor == FL_PROCEDURE | |
6732 | && !module_ns->proc_name->attr.contained)) | |
63d42079 | 6733 | break; |
6734 | ||
6735 | if (module_ns == NULL) | |
6736 | return MATCH_ERROR; | |
6737 | ||
94ce9f74 | 6738 | /* Store the current state of the interface. We will need it if we |
6739 | end up with a syntax error and need to recover. */ | |
6740 | old_interface_head = gfc_current_interface_head (); | |
6741 | ||
4ee9c684 | 6742 | for (;;) |
6743 | { | |
15ca3865 | 6744 | locus old_locus = gfc_current_locus; |
94ce9f74 | 6745 | bool last = false; |
6746 | ||
4ee9c684 | 6747 | m = gfc_match_name (name); |
6748 | if (m == MATCH_NO) | |
6749 | goto syntax; | |
6750 | if (m != MATCH_YES) | |
6751 | return MATCH_ERROR; | |
6752 | ||
94ce9f74 | 6753 | /* Check for syntax error before starting to add symbols to the |
6754 | current namespace. */ | |
6755 | if (gfc_match_eos () == MATCH_YES) | |
6756 | last = true; | |
6757 | if (!last && gfc_match_char (',') != MATCH_YES) | |
6758 | goto syntax; | |
6759 | ||
6760 | /* Now we're sure the syntax is valid, we process this item | |
6761 | further. */ | |
63d42079 | 6762 | if (gfc_get_symbol (name, module_ns, &sym)) |
4ee9c684 | 6763 | return MATCH_ERROR; |
6764 | ||
15ca3865 | 6765 | if (sym->attr.intrinsic) |
6766 | { | |
6767 | gfc_error ("Intrinsic procedure at %L cannot be a MODULE " | |
6768 | "PROCEDURE", &old_locus); | |
6769 | return MATCH_ERROR; | |
6770 | } | |
6771 | ||
4ee9c684 | 6772 | if (sym->attr.proc != PROC_MODULE |
950683ed | 6773 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
6774 | sym->name, NULL) == FAILURE) | |
4ee9c684 | 6775 | return MATCH_ERROR; |
6776 | ||
6777 | if (gfc_add_interface (sym) == FAILURE) | |
6778 | return MATCH_ERROR; | |
6779 | ||
3186f695 | 6780 | sym->attr.mod_proc = 1; |
15ca3865 | 6781 | sym->declared_at = old_locus; |
3186f695 | 6782 | |
94ce9f74 | 6783 | if (last) |
4ee9c684 | 6784 | break; |
4ee9c684 | 6785 | } |
6786 | ||
6787 | return MATCH_YES; | |
6788 | ||
6789 | syntax: | |
94ce9f74 | 6790 | /* Restore the previous state of the interface. */ |
6791 | interface = gfc_current_interface_head (); | |
6792 | gfc_set_current_interface_head (old_interface_head); | |
6793 | ||
6794 | /* Free the new interfaces. */ | |
6795 | while (interface != old_interface_head) | |
6796 | { | |
6797 | gfc_interface *i = interface->next; | |
6798 | gfc_free (interface); | |
6799 | interface = i; | |
6800 | } | |
6801 | ||
6802 | /* And issue a syntax error. */ | |
4ee9c684 | 6803 | gfc_syntax_error (ST_MODULE_PROC); |
6804 | return MATCH_ERROR; | |
6805 | } | |
6806 | ||
6807 | ||
ea94d76d | 6808 | /* Check a derived type that is being extended. */ |
6809 | static gfc_symbol* | |
6810 | check_extended_derived_type (char *name) | |
6811 | { | |
6812 | gfc_symbol *extended; | |
6813 | ||
6814 | if (gfc_find_symbol (name, gfc_current_ns, 1, &extended)) | |
6815 | { | |
6816 | gfc_error ("Ambiguous symbol in TYPE definition at %C"); | |
6817 | return NULL; | |
6818 | } | |
6819 | ||
6820 | if (!extended) | |
6821 | { | |
6822 | gfc_error ("No such symbol in TYPE definition at %C"); | |
6823 | return NULL; | |
6824 | } | |
6825 | ||
6826 | if (extended->attr.flavor != FL_DERIVED) | |
6827 | { | |
6828 | gfc_error ("'%s' in EXTENDS expression at %C is not a " | |
6829 | "derived type", name); | |
6830 | return NULL; | |
6831 | } | |
6832 | ||
6833 | if (extended->attr.is_bind_c) | |
6834 | { | |
6835 | gfc_error ("'%s' cannot be extended at %C because it " | |
6836 | "is BIND(C)", extended->name); | |
6837 | return NULL; | |
6838 | } | |
6839 | ||
6840 | if (extended->attr.sequence) | |
6841 | { | |
6842 | gfc_error ("'%s' cannot be extended at %C because it " | |
6843 | "is a SEQUENCE type", extended->name); | |
6844 | return NULL; | |
6845 | } | |
6846 | ||
6847 | return extended; | |
6848 | } | |
6849 | ||
6850 | ||
c5d33754 | 6851 | /* Match the optional attribute specifiers for a type declaration. |
6852 | Return MATCH_ERROR if an error is encountered in one of the handled | |
6853 | attributes (public, private, bind(c)), MATCH_NO if what's found is | |
6854 | not a handled attribute, and MATCH_YES otherwise. TODO: More error | |
6855 | checking on attribute conflicts needs to be done. */ | |
4ee9c684 | 6856 | |
6857 | match | |
ea94d76d | 6858 | gfc_get_type_attr_spec (symbol_attribute *attr, char *name) |
4ee9c684 | 6859 | { |
c5d33754 | 6860 | /* See if the derived type is marked as private. */ |
4ee9c684 | 6861 | if (gfc_match (" , private") == MATCH_YES) |
6862 | { | |
e14bee04 | 6863 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 6864 | { |
e14bee04 | 6865 | gfc_error ("Derived type at %C can only be PRIVATE in the " |
6866 | "specification part of a module"); | |
4ee9c684 | 6867 | return MATCH_ERROR; |
6868 | } | |
6869 | ||
c5d33754 | 6870 | if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
4ee9c684 | 6871 | return MATCH_ERROR; |
4ee9c684 | 6872 | } |
c5d33754 | 6873 | else if (gfc_match (" , public") == MATCH_YES) |
4ee9c684 | 6874 | { |
e14bee04 | 6875 | if (gfc_current_state () != COMP_MODULE) |
4ee9c684 | 6876 | { |
e14bee04 | 6877 | gfc_error ("Derived type at %C can only be PUBLIC in the " |
6878 | "specification part of a module"); | |
4ee9c684 | 6879 | return MATCH_ERROR; |
6880 | } | |
6881 | ||
c5d33754 | 6882 | if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
4ee9c684 | 6883 | return MATCH_ERROR; |
4ee9c684 | 6884 | } |
ac5f2650 | 6885 | else if (gfc_match (" , bind ( c )") == MATCH_YES) |
c5d33754 | 6886 | { |
6887 | /* If the type is defined to be bind(c) it then needs to make | |
6888 | sure that all fields are interoperable. This will | |
6889 | need to be a semantic check on the finished derived type. | |
6890 | See 15.2.3 (lines 9-12) of F2003 draft. */ | |
6891 | if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) | |
6892 | return MATCH_ERROR; | |
6893 | ||
6894 | /* TODO: attr conflicts need to be checked, probably in symbol.c. */ | |
6895 | } | |
ac5f2650 | 6896 | else if (gfc_match (" , abstract") == MATCH_YES) |
6897 | { | |
6898 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C") | |
6899 | == FAILURE) | |
6900 | return MATCH_ERROR; | |
6901 | ||
6902 | if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE) | |
6903 | return MATCH_ERROR; | |
6904 | } | |
ea94d76d | 6905 | else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES) |
6906 | { | |
e485ad6b | 6907 | if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE) |
ea94d76d | 6908 | return MATCH_ERROR; |
6909 | } | |
c5d33754 | 6910 | else |
6911 | return MATCH_NO; | |
6912 | ||
6913 | /* If we get here, something matched. */ | |
6914 | return MATCH_YES; | |
6915 | } | |
6916 | ||
6917 | ||
5855d191 | 6918 | /* Assign a hash value for a derived type. The algorithm is that of |
6919 | SDBM. The hashed string is '[module_name #] derived_name'. */ | |
6920 | static unsigned int | |
6921 | hash_value (gfc_symbol *sym) | |
6922 | { | |
6923 | unsigned int hash = 0; | |
6924 | const char *c; | |
6925 | int i, len; | |
6926 | ||
6927 | /* Hash of the module or procedure name. */ | |
6928 | if (sym->module != NULL) | |
6929 | c = sym->module; | |
6930 | else if (sym->ns && sym->ns->proc_name | |
6931 | && sym->ns->proc_name->attr.flavor == FL_MODULE) | |
6932 | c = sym->ns->proc_name->name; | |
6933 | else | |
6934 | c = NULL; | |
6935 | ||
6936 | if (c) | |
6937 | { | |
6938 | len = strlen (c); | |
6939 | for (i = 0; i < len; i++, c++) | |
6940 | hash = (hash << 6) + (hash << 16) - hash + (*c); | |
6941 | ||
6942 | /* Disambiguate between 'a' in 'aa' and 'aa' in 'a'. */ | |
6943 | hash = (hash << 6) + (hash << 16) - hash + '#'; | |
6944 | } | |
6945 | ||
6946 | /* Hash of the derived type name. */ | |
6947 | len = strlen (sym->name); | |
6948 | c = sym->name; | |
6949 | for (i = 0; i < len; i++, c++) | |
6950 | hash = (hash << 6) + (hash << 16) - hash + (*c); | |
6951 | ||
6952 | /* Return the hash but take the modulus for the sake of module read, | |
6953 | even though this slightly increases the chance of collision. */ | |
6954 | return (hash % 100000000); | |
6955 | } | |
1de1b1a9 | 6956 | |
6957 | ||
c5d33754 | 6958 | /* Match the beginning of a derived type declaration. If a type name |
6959 | was the result of a function, then it is possible to have a symbol | |
6960 | already to be known as a derived type yet have no components. */ | |
6961 | ||
6962 | match | |
6963 | gfc_match_derived_decl (void) | |
6964 | { | |
6965 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
ea94d76d | 6966 | char parent[GFC_MAX_SYMBOL_LEN + 1]; |
c5d33754 | 6967 | symbol_attribute attr; |
6968 | gfc_symbol *sym; | |
ea94d76d | 6969 | gfc_symbol *extended; |
c5d33754 | 6970 | match m; |
6971 | match is_type_attr_spec = MATCH_NO; | |
33e86520 | 6972 | bool seen_attr = false; |
c5d33754 | 6973 | |
6974 | if (gfc_current_state () == COMP_DERIVED) | |
6975 | return MATCH_NO; | |
6976 | ||
ea94d76d | 6977 | name[0] = '\0'; |
6978 | parent[0] = '\0'; | |
c5d33754 | 6979 | gfc_clear_attr (&attr); |
ea94d76d | 6980 | extended = NULL; |
c5d33754 | 6981 | |
6982 | do | |
6983 | { | |
ea94d76d | 6984 | is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent); |
c5d33754 | 6985 | if (is_type_attr_spec == MATCH_ERROR) |
6986 | return MATCH_ERROR; | |
33e86520 | 6987 | if (is_type_attr_spec == MATCH_YES) |
6988 | seen_attr = true; | |
c5d33754 | 6989 | } while (is_type_attr_spec == MATCH_YES); |
4ee9c684 | 6990 | |
e485ad6b | 6991 | /* Deal with derived type extensions. The extension attribute has |
6992 | been added to 'attr' but now the parent type must be found and | |
6993 | checked. */ | |
ea94d76d | 6994 | if (parent[0]) |
6995 | extended = check_extended_derived_type (parent); | |
6996 | ||
6997 | if (parent[0] && !extended) | |
6998 | return MATCH_ERROR; | |
6999 | ||
33e86520 | 7000 | if (gfc_match (" ::") != MATCH_YES && seen_attr) |
4ee9c684 | 7001 | { |
7002 | gfc_error ("Expected :: in TYPE definition at %C"); | |
7003 | return MATCH_ERROR; | |
7004 | } | |
7005 | ||
7006 | m = gfc_match (" %n%t", name); | |
7007 | if (m != MATCH_YES) | |
7008 | return m; | |
7009 | ||
a3055431 | 7010 | /* Make sure the name is not the name of an intrinsic type. */ |
7011 | if (gfc_is_intrinsic_typename (name)) | |
4ee9c684 | 7012 | { |
1a9745d2 | 7013 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
7014 | "type", name); | |
4ee9c684 | 7015 | return MATCH_ERROR; |
7016 | } | |
7017 | ||
7018 | if (gfc_get_symbol (name, NULL, &sym)) | |
7019 | return MATCH_ERROR; | |
7020 | ||
7021 | if (sym->ts.type != BT_UNKNOWN) | |
7022 | { | |
7023 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
7024 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
7025 | return MATCH_ERROR; | |
7026 | } | |
7027 | ||
7028 | /* The symbol may already have the derived attribute without the | |
7029 | components. The ways this can happen is via a function | |
7030 | definition, an INTRINSIC statement or a subtype in another | |
7031 | derived type that is a pointer. The first part of the AND clause | |
69b1505f | 7032 | is true if the symbol is not the return value of a function. */ |
4ee9c684 | 7033 | if (sym->attr.flavor != FL_DERIVED |
950683ed | 7034 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
4ee9c684 | 7035 | return MATCH_ERROR; |
7036 | ||
e6b82afc | 7037 | if (sym->components != NULL || sym->attr.zero_comp) |
4ee9c684 | 7038 | { |
1a9745d2 | 7039 | gfc_error ("Derived type definition of '%s' at %C has already been " |
7040 | "defined", sym->name); | |
4ee9c684 | 7041 | return MATCH_ERROR; |
7042 | } | |
7043 | ||
7044 | if (attr.access != ACCESS_UNKNOWN | |
950683ed | 7045 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
4ee9c684 | 7046 | return MATCH_ERROR; |
7047 | ||
c5d33754 | 7048 | /* See if the derived type was labeled as bind(c). */ |
7049 | if (attr.is_bind_c != 0) | |
7050 | sym->attr.is_bind_c = attr.is_bind_c; | |
7051 | ||
223f0f57 | 7052 | /* Construct the f2k_derived namespace if it is not yet there. */ |
7053 | if (!sym->f2k_derived) | |
7054 | sym->f2k_derived = gfc_get_namespace (NULL, 0); | |
ea94d76d | 7055 | |
7056 | if (extended && !sym->components) | |
7057 | { | |
7058 | gfc_component *p; | |
7059 | gfc_symtree *st; | |
7060 | ||
7061 | /* Add the extended derived type as the first component. */ | |
7062 | gfc_add_component (sym, parent, &p); | |
ea94d76d | 7063 | extended->refs++; |
7064 | gfc_set_sym_referenced (extended); | |
7065 | ||
7066 | p->ts.type = BT_DERIVED; | |
eeebe20b | 7067 | p->ts.u.derived = extended; |
ea94d76d | 7068 | p->initializer = gfc_default_initializer (&p->ts); |
bdfbc762 | 7069 | |
7070 | /* Set extension level. */ | |
7071 | if (extended->attr.extension == 255) | |
7072 | { | |
7073 | /* Since the extension field is 8 bit wide, we can only have | |
7074 | up to 255 extension levels. */ | |
7075 | gfc_error ("Maximum extension level reached with type '%s' at %L", | |
7076 | extended->name, &extended->declared_at); | |
7077 | return MATCH_ERROR; | |
7078 | } | |
7079 | sym->attr.extension = extended->attr.extension + 1; | |
ea94d76d | 7080 | |
7081 | /* Provide the links between the extended type and its extension. */ | |
7082 | if (!extended->f2k_derived) | |
7083 | extended->f2k_derived = gfc_get_namespace (NULL, 0); | |
7084 | st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name); | |
7085 | st->n.sym = sym; | |
7086 | } | |
7087 | ||
bdfbc762 | 7088 | if (!sym->hash_value) |
7089 | /* Set the hash for the compound name for this type. */ | |
7090 | sym->hash_value = hash_value (sym); | |
1de1b1a9 | 7091 | |
ac5f2650 | 7092 | /* Take over the ABSTRACT attribute. */ |
7093 | sym->attr.abstract = attr.abstract; | |
7094 | ||
4ee9c684 | 7095 | gfc_new_block = sym; |
7096 | ||
7097 | return MATCH_YES; | |
7098 | } | |
b549d2a5 | 7099 | |
7100 | ||
7101 | /* Cray Pointees can be declared as: | |
452695a8 | 7102 | pointer (ipt, a (n,m,...,*)) */ |
b549d2a5 | 7103 | |
8458f4ca | 7104 | match |
b549d2a5 | 7105 | gfc_mod_pointee_as (gfc_array_spec *as) |
7106 | { | |
7107 | as->cray_pointee = true; /* This will be useful to know later. */ | |
7108 | if (as->type == AS_ASSUMED_SIZE) | |
452695a8 | 7109 | as->cp_was_assumed = true; |
b549d2a5 | 7110 | else if (as->type == AS_ASSUMED_SHAPE) |
7111 | { | |
7112 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
7113 | return MATCH_ERROR; | |
7114 | } | |
7115 | return MATCH_YES; | |
7116 | } | |
3b6a4b41 | 7117 | |
7118 | ||
7119 | /* Match the enum definition statement, here we are trying to match | |
7120 | the first line of enum definition statement. | |
7121 | Returns MATCH_YES if match is found. */ | |
7122 | ||
7123 | match | |
7124 | gfc_match_enum (void) | |
7125 | { | |
7126 | match m; | |
7127 | ||
7128 | m = gfc_match_eos (); | |
7129 | if (m != MATCH_YES) | |
7130 | return m; | |
7131 | ||
60fbbf9e | 7132 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") |
3b6a4b41 | 7133 | == FAILURE) |
7134 | return MATCH_ERROR; | |
7135 | ||
7136 | return MATCH_YES; | |
7137 | } | |
7138 | ||
7139 | ||
fe1328da | 7140 | /* Returns an initializer whose value is one higher than the value of the |
7141 | LAST_INITIALIZER argument. If the argument is NULL, the | |
7142 | initializers value will be set to zero. The initializer's kind | |
7143 | will be set to gfc_c_int_kind. | |
7144 | ||
7145 | If -fshort-enums is given, the appropriate kind will be selected | |
7146 | later after all enumerators have been parsed. A warning is issued | |
7147 | here if an initializer exceeds gfc_c_int_kind. */ | |
7148 | ||
7149 | static gfc_expr * | |
7150 | enum_initializer (gfc_expr *last_initializer, locus where) | |
7151 | { | |
7152 | gfc_expr *result; | |
126387b5 | 7153 | result = gfc_get_constant_expr (BT_INTEGER, gfc_c_int_kind, &where); |
fe1328da | 7154 | |
7155 | mpz_init (result->value.integer); | |
7156 | ||
7157 | if (last_initializer != NULL) | |
7158 | { | |
7159 | mpz_add_ui (result->value.integer, last_initializer->value.integer, 1); | |
7160 | result->where = last_initializer->where; | |
7161 | ||
7162 | if (gfc_check_integer_range (result->value.integer, | |
7163 | gfc_c_int_kind) != ARITH_OK) | |
7164 | { | |
7165 | gfc_error ("Enumerator exceeds the C integer type at %C"); | |
7166 | return NULL; | |
7167 | } | |
7168 | } | |
7169 | else | |
7170 | { | |
7171 | /* Control comes here, if it's the very first enumerator and no | |
7172 | initializer has been given. It will be initialized to zero. */ | |
7173 | mpz_set_si (result->value.integer, 0); | |
7174 | } | |
7175 | ||
7176 | return result; | |
7177 | } | |
7178 | ||
7179 | ||
60fbbf9e | 7180 | /* Match a variable name with an optional initializer. When this |
7181 | subroutine is called, a variable is expected to be parsed next. | |
7182 | Depending on what is happening at the moment, updates either the | |
7183 | symbol table or the current interface. */ | |
7184 | ||
7185 | static match | |
7186 | enumerator_decl (void) | |
7187 | { | |
7188 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7189 | gfc_expr *initializer; | |
7190 | gfc_array_spec *as = NULL; | |
7191 | gfc_symbol *sym; | |
7192 | locus var_locus; | |
7193 | match m; | |
f6bb8f4b | 7194 | gfc_try t; |
60fbbf9e | 7195 | locus old_locus; |
7196 | ||
7197 | initializer = NULL; | |
7198 | old_locus = gfc_current_locus; | |
7199 | ||
7200 | /* When we get here, we've just matched a list of attributes and | |
7201 | maybe a type and a double colon. The next thing we expect to see | |
7202 | is the name of the symbol. */ | |
7203 | m = gfc_match_name (name); | |
7204 | if (m != MATCH_YES) | |
7205 | goto cleanup; | |
7206 | ||
7207 | var_locus = gfc_current_locus; | |
7208 | ||
7209 | /* OK, we've successfully matched the declaration. Now put the | |
7210 | symbol in the current namespace. If we fail to create the symbol, | |
7211 | bail out. */ | |
7212 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
7213 | { | |
7214 | m = MATCH_ERROR; | |
7215 | goto cleanup; | |
7216 | } | |
7217 | ||
7218 | /* The double colon must be present in order to have initializers. | |
7219 | Otherwise the statement is ambiguous with an assignment statement. */ | |
7220 | if (colon_seen) | |
7221 | { | |
7222 | if (gfc_match_char ('=') == MATCH_YES) | |
7223 | { | |
7224 | m = gfc_match_init_expr (&initializer); | |
7225 | if (m == MATCH_NO) | |
7226 | { | |
7227 | gfc_error ("Expected an initialization expression at %C"); | |
7228 | m = MATCH_ERROR; | |
7229 | } | |
7230 | ||
7231 | if (m != MATCH_YES) | |
7232 | goto cleanup; | |
7233 | } | |
7234 | } | |
7235 | ||
7236 | /* If we do not have an initializer, the initialization value of the | |
7237 | previous enumerator (stored in last_initializer) is incremented | |
7238 | by 1 and is used to initialize the current enumerator. */ | |
7239 | if (initializer == NULL) | |
fe1328da | 7240 | initializer = enum_initializer (last_initializer, old_locus); |
e14bee04 | 7241 | |
60fbbf9e | 7242 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
7243 | { | |
a8beb4f8 | 7244 | gfc_error ("ENUMERATOR %L not initialized with integer expression", |
7245 | &var_locus); | |
e14bee04 | 7246 | m = MATCH_ERROR; |
60fbbf9e | 7247 | goto cleanup; |
7248 | } | |
7249 | ||
7250 | /* Store this current initializer, for the next enumerator variable | |
7251 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
7252 | use last_initializer below. */ | |
7253 | last_initializer = initializer; | |
7254 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
7255 | ||
7256 | /* Maintain enumerator history. */ | |
7257 | gfc_find_symbol (name, NULL, 0, &sym); | |
7258 | create_enum_history (sym, last_initializer); | |
7259 | ||
7260 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
7261 | ||
7262 | cleanup: | |
7263 | /* Free stuff up and return. */ | |
7264 | gfc_free_expr (initializer); | |
7265 | ||
7266 | return m; | |
7267 | } | |
7268 | ||
7269 | ||
f6d0e37a | 7270 | /* Match the enumerator definition statement. */ |
3b6a4b41 | 7271 | |
7272 | match | |
7273 | gfc_match_enumerator_def (void) | |
7274 | { | |
7275 | match m; | |
f6bb8f4b | 7276 | gfc_try t; |
e14bee04 | 7277 | |
3b6a4b41 | 7278 | gfc_clear_ts (¤t_ts); |
e14bee04 | 7279 | |
3b6a4b41 | 7280 | m = gfc_match (" enumerator"); |
7281 | if (m != MATCH_YES) | |
7282 | return m; | |
60fbbf9e | 7283 | |
7284 | m = gfc_match (" :: "); | |
7285 | if (m == MATCH_ERROR) | |
7286 | return m; | |
7287 | ||
7288 | colon_seen = (m == MATCH_YES); | |
e14bee04 | 7289 | |
3b6a4b41 | 7290 | if (gfc_current_state () != COMP_ENUM) |
7291 | { | |
7292 | gfc_error ("ENUM definition statement expected before %C"); | |
7293 | gfc_free_enum_history (); | |
7294 | return MATCH_ERROR; | |
7295 | } | |
7296 | ||
7297 | (¤t_ts)->type = BT_INTEGER; | |
7298 | (¤t_ts)->kind = gfc_c_int_kind; | |
e14bee04 | 7299 | |
60fbbf9e | 7300 | gfc_clear_attr (¤t_attr); |
7301 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
7302 | if (t == FAILURE) | |
3b6a4b41 | 7303 | { |
60fbbf9e | 7304 | m = MATCH_ERROR; |
3b6a4b41 | 7305 | goto cleanup; |
7306 | } | |
7307 | ||
3b6a4b41 | 7308 | for (;;) |
7309 | { | |
60fbbf9e | 7310 | m = enumerator_decl (); |
3b6a4b41 | 7311 | if (m == MATCH_ERROR) |
a8beb4f8 | 7312 | { |
7313 | gfc_free_enum_history (); | |
7314 | goto cleanup; | |
7315 | } | |
3b6a4b41 | 7316 | if (m == MATCH_NO) |
7317 | break; | |
7318 | ||
7319 | if (gfc_match_eos () == MATCH_YES) | |
7320 | goto cleanup; | |
7321 | if (gfc_match_char (',') != MATCH_YES) | |
7322 | break; | |
7323 | } | |
7324 | ||
7325 | if (gfc_current_state () == COMP_ENUM) | |
7326 | { | |
7327 | gfc_free_enum_history (); | |
7328 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
7329 | m = MATCH_ERROR; | |
7330 | } | |
7331 | ||
7332 | cleanup: | |
7333 | gfc_free_array_spec (current_as); | |
7334 | current_as = NULL; | |
7335 | return m; | |
7336 | ||
7337 | } | |
7338 | ||
e449e4dd | 7339 | |
7fd88f6e | 7340 | /* Match binding attributes. */ |
7341 | ||
7342 | static match | |
64e93293 | 7343 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc) |
7fd88f6e | 7344 | { |
7345 | bool found_passing = false; | |
64e93293 | 7346 | bool seen_ptr = false; |
fe9b08a2 | 7347 | match m = MATCH_YES; |
7fd88f6e | 7348 | |
7349 | /* Intialize to defaults. Do so even before the MATCH_NO check so that in | |
7350 | this case the defaults are in there. */ | |
7351 | ba->access = ACCESS_UNKNOWN; | |
7352 | ba->pass_arg = NULL; | |
7353 | ba->pass_arg_num = 0; | |
7354 | ba->nopass = 0; | |
7355 | ba->non_overridable = 0; | |
61c3b81d | 7356 | ba->deferred = 0; |
fe9b08a2 | 7357 | ba->ppc = ppc; |
7fd88f6e | 7358 | |
7359 | /* If we find a comma, we believe there are binding attributes. */ | |
fe9b08a2 | 7360 | m = gfc_match_char (','); |
7361 | if (m == MATCH_NO) | |
7362 | goto done; | |
7fd88f6e | 7363 | |
7364 | do | |
7365 | { | |
e2f06a48 | 7366 | /* Access specifier. */ |
7367 | ||
7368 | m = gfc_match (" public"); | |
7fd88f6e | 7369 | if (m == MATCH_ERROR) |
7370 | goto error; | |
7371 | if (m == MATCH_YES) | |
7372 | { | |
e2f06a48 | 7373 | if (ba->access != ACCESS_UNKNOWN) |
7fd88f6e | 7374 | { |
e2f06a48 | 7375 | gfc_error ("Duplicate access-specifier at %C"); |
7fd88f6e | 7376 | goto error; |
7377 | } | |
7378 | ||
e2f06a48 | 7379 | ba->access = ACCESS_PUBLIC; |
7fd88f6e | 7380 | continue; |
7381 | } | |
7382 | ||
e2f06a48 | 7383 | m = gfc_match (" private"); |
7fd88f6e | 7384 | if (m == MATCH_ERROR) |
7385 | goto error; | |
7386 | if (m == MATCH_YES) | |
7387 | { | |
e2f06a48 | 7388 | if (ba->access != ACCESS_UNKNOWN) |
7fd88f6e | 7389 | { |
e2f06a48 | 7390 | gfc_error ("Duplicate access-specifier at %C"); |
7fd88f6e | 7391 | goto error; |
7392 | } | |
7393 | ||
e2f06a48 | 7394 | ba->access = ACCESS_PRIVATE; |
7fd88f6e | 7395 | continue; |
7396 | } | |
7397 | ||
e2f06a48 | 7398 | /* If inside GENERIC, the following is not allowed. */ |
7399 | if (!generic) | |
7fd88f6e | 7400 | { |
7fd88f6e | 7401 | |
e2f06a48 | 7402 | /* NOPASS flag. */ |
7403 | m = gfc_match (" nopass"); | |
7404 | if (m == MATCH_ERROR) | |
7405 | goto error; | |
7406 | if (m == MATCH_YES) | |
7fd88f6e | 7407 | { |
e2f06a48 | 7408 | if (found_passing) |
7409 | { | |
7410 | gfc_error ("Binding attributes already specify passing," | |
7411 | " illegal NOPASS at %C"); | |
7412 | goto error; | |
7413 | } | |
7414 | ||
7415 | found_passing = true; | |
7416 | ba->nopass = 1; | |
7417 | continue; | |
7fd88f6e | 7418 | } |
7419 | ||
e2f06a48 | 7420 | /* PASS possibly including argument. */ |
7421 | m = gfc_match (" pass"); | |
7422 | if (m == MATCH_ERROR) | |
7423 | goto error; | |
7424 | if (m == MATCH_YES) | |
7fd88f6e | 7425 | { |
e2f06a48 | 7426 | char arg[GFC_MAX_SYMBOL_LEN + 1]; |
7427 | ||
7428 | if (found_passing) | |
7429 | { | |
7430 | gfc_error ("Binding attributes already specify passing," | |
7431 | " illegal PASS at %C"); | |
7432 | goto error; | |
7433 | } | |
7434 | ||
7435 | m = gfc_match (" ( %n )", arg); | |
7436 | if (m == MATCH_ERROR) | |
7437 | goto error; | |
7438 | if (m == MATCH_YES) | |
fe9b08a2 | 7439 | ba->pass_arg = gfc_get_string (arg); |
e2f06a48 | 7440 | gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL)); |
7441 | ||
7442 | found_passing = true; | |
7443 | ba->nopass = 0; | |
7444 | continue; | |
7fd88f6e | 7445 | } |
7446 | ||
64e93293 | 7447 | if (ppc) |
7448 | { | |
7449 | /* POINTER flag. */ | |
7450 | m = gfc_match (" pointer"); | |
7451 | if (m == MATCH_ERROR) | |
7452 | goto error; | |
7453 | if (m == MATCH_YES) | |
7454 | { | |
7455 | if (seen_ptr) | |
7456 | { | |
7457 | gfc_error ("Duplicate POINTER attribute at %C"); | |
7458 | goto error; | |
7459 | } | |
7460 | ||
7461 | seen_ptr = true; | |
64e93293 | 7462 | continue; |
7463 | } | |
7464 | } | |
7465 | else | |
7466 | { | |
7467 | /* NON_OVERRIDABLE flag. */ | |
7468 | m = gfc_match (" non_overridable"); | |
7469 | if (m == MATCH_ERROR) | |
7470 | goto error; | |
7471 | if (m == MATCH_YES) | |
7472 | { | |
7473 | if (ba->non_overridable) | |
7474 | { | |
7475 | gfc_error ("Duplicate NON_OVERRIDABLE at %C"); | |
7476 | goto error; | |
7477 | } | |
7478 | ||
7479 | ba->non_overridable = 1; | |
7480 | continue; | |
7481 | } | |
7482 | ||
7483 | /* DEFERRED flag. */ | |
7484 | m = gfc_match (" deferred"); | |
7485 | if (m == MATCH_ERROR) | |
7486 | goto error; | |
7487 | if (m == MATCH_YES) | |
7488 | { | |
7489 | if (ba->deferred) | |
7490 | { | |
7491 | gfc_error ("Duplicate DEFERRED at %C"); | |
7492 | goto error; | |
7493 | } | |
7494 | ||
7495 | ba->deferred = 1; | |
7496 | continue; | |
7497 | } | |
7498 | } | |
7499 | ||
7fd88f6e | 7500 | } |
7501 | ||
7502 | /* Nothing matching found. */ | |
e2f06a48 | 7503 | if (generic) |
7504 | gfc_error ("Expected access-specifier at %C"); | |
7505 | else | |
7506 | gfc_error ("Expected binding attribute at %C"); | |
7fd88f6e | 7507 | goto error; |
7508 | } | |
7509 | while (gfc_match_char (',') == MATCH_YES); | |
7510 | ||
61c3b81d | 7511 | /* NON_OVERRIDABLE and DEFERRED exclude themselves. */ |
7512 | if (ba->non_overridable && ba->deferred) | |
7513 | { | |
7514 | gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C"); | |
7515 | goto error; | |
7516 | } | |
7517 | ||
fe9b08a2 | 7518 | m = MATCH_YES; |
7519 | ||
7520 | done: | |
e2f06a48 | 7521 | if (ba->access == ACCESS_UNKNOWN) |
7522 | ba->access = gfc_typebound_default_access; | |
7523 | ||
64e93293 | 7524 | if (ppc && !seen_ptr) |
7525 | { | |
7526 | gfc_error ("POINTER attribute is required for procedure pointer component" | |
7527 | " at %C"); | |
7528 | goto error; | |
7529 | } | |
7530 | ||
fe9b08a2 | 7531 | return m; |
7fd88f6e | 7532 | |
7533 | error: | |
7fd88f6e | 7534 | return MATCH_ERROR; |
7535 | } | |
7536 | ||
7537 | ||
7538 | /* Match a PROCEDURE specific binding inside a derived type. */ | |
7539 | ||
7540 | static match | |
7541 | match_procedure_in_type (void) | |
7542 | { | |
7543 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7544 | char target_buf[GFC_MAX_SYMBOL_LEN + 1]; | |
7a3aaef8 | 7545 | char* target = NULL, *ifc = NULL; |
4a12b9ba | 7546 | gfc_typebound_proc tb; |
7fd88f6e | 7547 | bool seen_colons; |
7548 | bool seen_attrs; | |
7549 | match m; | |
7550 | gfc_symtree* stree; | |
7551 | gfc_namespace* ns; | |
7552 | gfc_symbol* block; | |
7a3aaef8 | 7553 | int num; |
7fd88f6e | 7554 | |
7555 | /* Check current state. */ | |
7556 | gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS); | |
7557 | block = gfc_state_stack->previous->sym; | |
7558 | gcc_assert (block); | |
7559 | ||
61c3b81d | 7560 | /* Try to match PROCEDURE(interface). */ |
7fd88f6e | 7561 | if (gfc_match (" (") == MATCH_YES) |
7562 | { | |
61c3b81d | 7563 | m = gfc_match_name (target_buf); |
7564 | if (m == MATCH_ERROR) | |
7565 | return m; | |
7566 | if (m != MATCH_YES) | |
7567 | { | |
7568 | gfc_error ("Interface-name expected after '(' at %C"); | |
7569 | return MATCH_ERROR; | |
7570 | } | |
7571 | ||
7572 | if (gfc_match (" )") != MATCH_YES) | |
7573 | { | |
7574 | gfc_error ("')' expected at %C"); | |
7575 | return MATCH_ERROR; | |
7576 | } | |
7577 | ||
7a3aaef8 | 7578 | ifc = target_buf; |
7fd88f6e | 7579 | } |
7580 | ||
7581 | /* Construct the data structure. */ | |
4a12b9ba | 7582 | tb.where = gfc_current_locus; |
7583 | tb.is_generic = 0; | |
7fd88f6e | 7584 | |
7585 | /* Match binding attributes. */ | |
4a12b9ba | 7586 | m = match_binding_attributes (&tb, false, false); |
7fd88f6e | 7587 | if (m == MATCH_ERROR) |
7588 | return m; | |
7589 | seen_attrs = (m == MATCH_YES); | |
7590 | ||
7a3aaef8 | 7591 | /* Check that attribute DEFERRED is given if an interface is specified. */ |
4a12b9ba | 7592 | if (tb.deferred && !ifc) |
61c3b81d | 7593 | { |
7594 | gfc_error ("Interface must be specified for DEFERRED binding at %C"); | |
7595 | return MATCH_ERROR; | |
7596 | } | |
4a12b9ba | 7597 | if (ifc && !tb.deferred) |
61c3b81d | 7598 | { |
7599 | gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED"); | |
7600 | return MATCH_ERROR; | |
7601 | } | |
7602 | ||
7fd88f6e | 7603 | /* Match the colons. */ |
7604 | m = gfc_match (" ::"); | |
7605 | if (m == MATCH_ERROR) | |
7606 | return m; | |
7607 | seen_colons = (m == MATCH_YES); | |
7608 | if (seen_attrs && !seen_colons) | |
7609 | { | |
7610 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
7611 | return MATCH_ERROR; | |
7612 | } | |
7613 | ||
7a3aaef8 | 7614 | /* Match the binding names. */ |
7615 | for(num=1;;num++) | |
7fd88f6e | 7616 | { |
7a3aaef8 | 7617 | m = gfc_match_name (name); |
7618 | if (m == MATCH_ERROR) | |
7619 | return m; | |
7620 | if (m == MATCH_NO) | |
61c3b81d | 7621 | { |
7a3aaef8 | 7622 | gfc_error ("Expected binding name at %C"); |
61c3b81d | 7623 | return MATCH_ERROR; |
7624 | } | |
7625 | ||
7a3aaef8 | 7626 | if (num>1 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: PROCEDURE list" |
7627 | " at %C") == FAILURE) | |
7628 | return MATCH_ERROR; | |
7fd88f6e | 7629 | |
7a3aaef8 | 7630 | /* Try to match the '=> target', if it's there. */ |
7631 | target = ifc; | |
7632 | m = gfc_match (" =>"); | |
7fd88f6e | 7633 | if (m == MATCH_ERROR) |
7634 | return m; | |
7a3aaef8 | 7635 | if (m == MATCH_YES) |
7fd88f6e | 7636 | { |
4a12b9ba | 7637 | if (tb.deferred) |
7a3aaef8 | 7638 | { |
7639 | gfc_error ("'=> target' is invalid for DEFERRED binding at %C"); | |
7640 | return MATCH_ERROR; | |
7641 | } | |
7642 | ||
7643 | if (!seen_colons) | |
7644 | { | |
7645 | gfc_error ("'::' needed in PROCEDURE binding with explicit target" | |
7646 | " at %C"); | |
7647 | return MATCH_ERROR; | |
7648 | } | |
7649 | ||
7650 | m = gfc_match_name (target_buf); | |
7651 | if (m == MATCH_ERROR) | |
7652 | return m; | |
7653 | if (m == MATCH_NO) | |
7654 | { | |
7655 | gfc_error ("Expected binding target after '=>' at %C"); | |
7656 | return MATCH_ERROR; | |
7657 | } | |
7658 | target = target_buf; | |
7fd88f6e | 7659 | } |
7fd88f6e | 7660 | |
7a3aaef8 | 7661 | /* If no target was found, it has the same name as the binding. */ |
7662 | if (!target) | |
7663 | target = name; | |
7fd88f6e | 7664 | |
7a3aaef8 | 7665 | /* Get the namespace to insert the symbols into. */ |
7666 | ns = block->f2k_derived; | |
7667 | gcc_assert (ns); | |
7fd88f6e | 7668 | |
7a3aaef8 | 7669 | /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */ |
4a12b9ba | 7670 | if (tb.deferred && !block->attr.abstract) |
7a3aaef8 | 7671 | { |
7672 | gfc_error ("Type '%s' containing DEFERRED binding at %C " | |
7673 | "is not ABSTRACT", block->name); | |
7674 | return MATCH_ERROR; | |
7675 | } | |
7fd88f6e | 7676 | |
7a3aaef8 | 7677 | /* See if we already have a binding with this name in the symtree which |
7678 | would be an error. If a GENERIC already targetted this binding, it may | |
7679 | be already there but then typebound is still NULL. */ | |
7680 | stree = gfc_find_symtree (ns->tb_sym_root, name); | |
7681 | if (stree && stree->n.tb) | |
7682 | { | |
7683 | gfc_error ("There is already a procedure with binding name '%s' for " | |
7684 | "the derived type '%s' at %C", name, block->name); | |
7685 | return MATCH_ERROR; | |
7686 | } | |
61c3b81d | 7687 | |
7a3aaef8 | 7688 | /* Insert it and set attributes. */ |
7fd88f6e | 7689 | |
7a3aaef8 | 7690 | if (!stree) |
7691 | { | |
7692 | stree = gfc_new_symtree (&ns->tb_sym_root, name); | |
7693 | gcc_assert (stree); | |
7694 | } | |
4a12b9ba | 7695 | stree->n.tb = gfc_get_typebound_proc (&tb); |
3323e9b1 | 7696 | |
4a12b9ba | 7697 | if (gfc_get_sym_tree (target, gfc_current_ns, &stree->n.tb->u.specific, |
7698 | false)) | |
7a3aaef8 | 7699 | return MATCH_ERROR; |
4a12b9ba | 7700 | gfc_set_sym_referenced (stree->n.tb->u.specific->n.sym); |
7a3aaef8 | 7701 | |
7702 | if (gfc_match_eos () == MATCH_YES) | |
7703 | return MATCH_YES; | |
7704 | if (gfc_match_char (',') != MATCH_YES) | |
7705 | goto syntax; | |
3323e9b1 | 7706 | } |
7fd88f6e | 7707 | |
7a3aaef8 | 7708 | syntax: |
7709 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
7710 | return MATCH_ERROR; | |
7fd88f6e | 7711 | } |
7712 | ||
7713 | ||
e2f06a48 | 7714 | /* Match a GENERIC procedure binding inside a derived type. */ |
7715 | ||
7716 | match | |
7717 | gfc_match_generic (void) | |
7718 | { | |
7719 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
a36eb9ee | 7720 | char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */ |
e2f06a48 | 7721 | gfc_symbol* block; |
7722 | gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */ | |
7723 | gfc_typebound_proc* tb; | |
e2f06a48 | 7724 | gfc_namespace* ns; |
a36eb9ee | 7725 | interface_type op_type; |
7726 | gfc_intrinsic_op op; | |
e2f06a48 | 7727 | match m; |
7728 | ||
7729 | /* Check current state. */ | |
7730 | if (gfc_current_state () == COMP_DERIVED) | |
7731 | { | |
7732 | gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS"); | |
7733 | return MATCH_ERROR; | |
7734 | } | |
7735 | if (gfc_current_state () != COMP_DERIVED_CONTAINS) | |
7736 | return MATCH_NO; | |
7737 | block = gfc_state_stack->previous->sym; | |
7738 | ns = block->f2k_derived; | |
7739 | gcc_assert (block && ns); | |
7740 | ||
7741 | /* See if we get an access-specifier. */ | |
64e93293 | 7742 | m = match_binding_attributes (&tbattr, true, false); |
e2f06a48 | 7743 | if (m == MATCH_ERROR) |
7744 | goto error; | |
7745 | ||
7746 | /* Now the colons, those are required. */ | |
7747 | if (gfc_match (" ::") != MATCH_YES) | |
7748 | { | |
7749 | gfc_error ("Expected '::' at %C"); | |
7750 | goto error; | |
7751 | } | |
7752 | ||
a36eb9ee | 7753 | /* Match the binding name; depending on type (operator / generic) format |
7754 | it for future error messages into bind_name. */ | |
7755 | ||
7756 | m = gfc_match_generic_spec (&op_type, name, &op); | |
e2f06a48 | 7757 | if (m == MATCH_ERROR) |
7758 | return MATCH_ERROR; | |
7759 | if (m == MATCH_NO) | |
7760 | { | |
a36eb9ee | 7761 | gfc_error ("Expected generic name or operator descriptor at %C"); |
e2f06a48 | 7762 | goto error; |
7763 | } | |
7764 | ||
a36eb9ee | 7765 | switch (op_type) |
e2f06a48 | 7766 | { |
a36eb9ee | 7767 | case INTERFACE_GENERIC: |
7768 | snprintf (bind_name, sizeof (bind_name), "%s", name); | |
7769 | break; | |
7770 | ||
7771 | case INTERFACE_USER_OP: | |
7772 | snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name); | |
7773 | break; | |
7774 | ||
7775 | case INTERFACE_INTRINSIC_OP: | |
7776 | snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)", | |
7777 | gfc_op2string (op)); | |
7778 | break; | |
7779 | ||
7780 | default: | |
7781 | gcc_unreachable (); | |
7782 | } | |
3323e9b1 | 7783 | |
a36eb9ee | 7784 | /* Match the required =>. */ |
7785 | if (gfc_match (" =>") != MATCH_YES) | |
7786 | { | |
7787 | gfc_error ("Expected '=>' at %C"); | |
7788 | goto error; | |
7789 | } | |
7790 | ||
7791 | /* Try to find existing GENERIC binding with this name / for this operator; | |
7792 | if there is something, check that it is another GENERIC and then extend | |
7793 | it rather than building a new node. Otherwise, create it and put it | |
7794 | at the right position. */ | |
7795 | ||
7796 | switch (op_type) | |
7797 | { | |
7798 | case INTERFACE_USER_OP: | |
7799 | case INTERFACE_GENERIC: | |
7800 | { | |
7801 | const bool is_op = (op_type == INTERFACE_USER_OP); | |
7802 | gfc_symtree* st; | |
7803 | ||
7804 | st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name); | |
7805 | if (st) | |
7806 | { | |
7807 | tb = st->n.tb; | |
7808 | gcc_assert (tb); | |
7809 | } | |
7810 | else | |
7811 | tb = NULL; | |
7812 | ||
7813 | break; | |
7814 | } | |
7815 | ||
7816 | case INTERFACE_INTRINSIC_OP: | |
7817 | tb = ns->tb_op[op]; | |
7818 | break; | |
7819 | ||
7820 | default: | |
7821 | gcc_unreachable (); | |
7822 | } | |
7823 | ||
7824 | if (tb) | |
7825 | { | |
3323e9b1 | 7826 | if (!tb->is_generic) |
e2f06a48 | 7827 | { |
a36eb9ee | 7828 | gcc_assert (op_type == INTERFACE_GENERIC); |
e2f06a48 | 7829 | gfc_error ("There's already a non-generic procedure with binding name" |
7830 | " '%s' for the derived type '%s' at %C", | |
a36eb9ee | 7831 | bind_name, block->name); |
e2f06a48 | 7832 | goto error; |
7833 | } | |
7834 | ||
e2f06a48 | 7835 | if (tb->access != tbattr.access) |
7836 | { | |
7837 | gfc_error ("Binding at %C must have the same access as already" | |
a36eb9ee | 7838 | " defined binding '%s'", bind_name); |
e2f06a48 | 7839 | goto error; |
7840 | } | |
7841 | } | |
7842 | else | |
7843 | { | |
4a12b9ba | 7844 | tb = gfc_get_typebound_proc (NULL); |
e2f06a48 | 7845 | tb->where = gfc_current_locus; |
7846 | tb->access = tbattr.access; | |
7847 | tb->is_generic = 1; | |
7848 | tb->u.generic = NULL; | |
a36eb9ee | 7849 | |
7850 | switch (op_type) | |
7851 | { | |
7852 | case INTERFACE_GENERIC: | |
7853 | case INTERFACE_USER_OP: | |
7854 | { | |
7855 | const bool is_op = (op_type == INTERFACE_USER_OP); | |
7856 | gfc_symtree* st; | |
7857 | ||
7858 | st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root, | |
7859 | name); | |
7860 | gcc_assert (st); | |
7861 | st->n.tb = tb; | |
7862 | ||
7863 | break; | |
7864 | } | |
7865 | ||
7866 | case INTERFACE_INTRINSIC_OP: | |
7867 | ns->tb_op[op] = tb; | |
7868 | break; | |
7869 | ||
7870 | default: | |
7871 | gcc_unreachable (); | |
7872 | } | |
e2f06a48 | 7873 | } |
7874 | ||
7875 | /* Now, match all following names as specific targets. */ | |
7876 | do | |
7877 | { | |
7878 | gfc_symtree* target_st; | |
7879 | gfc_tbp_generic* target; | |
7880 | ||
7881 | m = gfc_match_name (name); | |
7882 | if (m == MATCH_ERROR) | |
7883 | goto error; | |
7884 | if (m == MATCH_NO) | |
7885 | { | |
7886 | gfc_error ("Expected specific binding name at %C"); | |
7887 | goto error; | |
7888 | } | |
7889 | ||
3323e9b1 | 7890 | target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name); |
e2f06a48 | 7891 | |
7892 | /* See if this is a duplicate specification. */ | |
7893 | for (target = tb->u.generic; target; target = target->next) | |
7894 | if (target_st == target->specific_st) | |
7895 | { | |
7896 | gfc_error ("'%s' already defined as specific binding for the" | |
a36eb9ee | 7897 | " generic '%s' at %C", name, bind_name); |
e2f06a48 | 7898 | goto error; |
7899 | } | |
7900 | ||
e2f06a48 | 7901 | target = gfc_get_tbp_generic (); |
7902 | target->specific_st = target_st; | |
7903 | target->specific = NULL; | |
7904 | target->next = tb->u.generic; | |
7905 | tb->u.generic = target; | |
7906 | } | |
7907 | while (gfc_match (" ,") == MATCH_YES); | |
7908 | ||
7909 | /* Here should be the end. */ | |
7910 | if (gfc_match_eos () != MATCH_YES) | |
7911 | { | |
7912 | gfc_error ("Junk after GENERIC binding at %C"); | |
7913 | goto error; | |
7914 | } | |
7915 | ||
7916 | return MATCH_YES; | |
7917 | ||
7918 | error: | |
7919 | return MATCH_ERROR; | |
7920 | } | |
7921 | ||
7922 | ||
223f0f57 | 7923 | /* Match a FINAL declaration inside a derived type. */ |
7924 | ||
7925 | match | |
7926 | gfc_match_final_decl (void) | |
7927 | { | |
7928 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7929 | gfc_symbol* sym; | |
7930 | match m; | |
7931 | gfc_namespace* module_ns; | |
7932 | bool first, last; | |
7fd88f6e | 7933 | gfc_symbol* block; |
223f0f57 | 7934 | |
519651c1 | 7935 | if (gfc_current_form == FORM_FREE) |
7936 | { | |
7937 | char c = gfc_peek_ascii_char (); | |
7938 | if (!gfc_is_whitespace (c) && c != ':') | |
7939 | return MATCH_NO; | |
7940 | } | |
7941 | ||
7fd88f6e | 7942 | if (gfc_state_stack->state != COMP_DERIVED_CONTAINS) |
223f0f57 | 7943 | { |
519651c1 | 7944 | if (gfc_current_form == FORM_FIXED) |
7945 | return MATCH_NO; | |
7946 | ||
223f0f57 | 7947 | gfc_error ("FINAL declaration at %C must be inside a derived type " |
7fd88f6e | 7948 | "CONTAINS section"); |
223f0f57 | 7949 | return MATCH_ERROR; |
7950 | } | |
7951 | ||
7fd88f6e | 7952 | block = gfc_state_stack->previous->sym; |
7953 | gcc_assert (block); | |
223f0f57 | 7954 | |
7fd88f6e | 7955 | if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous |
7956 | || gfc_state_stack->previous->previous->state != COMP_MODULE) | |
223f0f57 | 7957 | { |
7958 | gfc_error ("Derived type declaration with FINAL at %C must be in the" | |
7959 | " specification part of a MODULE"); | |
7960 | return MATCH_ERROR; | |
7961 | } | |
7962 | ||
7963 | module_ns = gfc_current_ns; | |
7964 | gcc_assert (module_ns); | |
7965 | gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE); | |
7966 | ||
7967 | /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */ | |
7968 | if (gfc_match (" ::") == MATCH_ERROR) | |
7969 | return MATCH_ERROR; | |
7970 | ||
7971 | /* Match the sequence of procedure names. */ | |
7972 | first = true; | |
7973 | last = false; | |
7974 | do | |
7975 | { | |
7976 | gfc_finalizer* f; | |
7977 | ||
7978 | if (first && gfc_match_eos () == MATCH_YES) | |
7979 | { | |
7980 | gfc_error ("Empty FINAL at %C"); | |
7981 | return MATCH_ERROR; | |
7982 | } | |
7983 | ||
7984 | m = gfc_match_name (name); | |
7985 | if (m == MATCH_NO) | |
7986 | { | |
7987 | gfc_error ("Expected module procedure name at %C"); | |
7988 | return MATCH_ERROR; | |
7989 | } | |
7990 | else if (m != MATCH_YES) | |
7991 | return MATCH_ERROR; | |
7992 | ||
7993 | if (gfc_match_eos () == MATCH_YES) | |
7994 | last = true; | |
7995 | if (!last && gfc_match_char (',') != MATCH_YES) | |
7996 | { | |
7997 | gfc_error ("Expected ',' at %C"); | |
7998 | return MATCH_ERROR; | |
7999 | } | |
8000 | ||
8001 | if (gfc_get_symbol (name, module_ns, &sym)) | |
8002 | { | |
8003 | gfc_error ("Unknown procedure name \"%s\" at %C", name); | |
8004 | return MATCH_ERROR; | |
8005 | } | |
8006 | ||
8007 | /* Mark the symbol as module procedure. */ | |
8008 | if (sym->attr.proc != PROC_MODULE | |
8009 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
8010 | sym->name, NULL) == FAILURE) | |
8011 | return MATCH_ERROR; | |
8012 | ||
8013 | /* Check if we already have this symbol in the list, this is an error. */ | |
7fd88f6e | 8014 | for (f = block->f2k_derived->finalizers; f; f = f->next) |
e449e4dd | 8015 | if (f->proc_sym == sym) |
223f0f57 | 8016 | { |
8017 | gfc_error ("'%s' at %C is already defined as FINAL procedure!", | |
8018 | name); | |
8019 | return MATCH_ERROR; | |
8020 | } | |
8021 | ||
8022 | /* Add this symbol to the list of finalizers. */ | |
7fd88f6e | 8023 | gcc_assert (block->f2k_derived); |
223f0f57 | 8024 | ++sym->refs; |
48d8ad5a | 8025 | f = XCNEW (gfc_finalizer); |
e449e4dd | 8026 | f->proc_sym = sym; |
8027 | f->proc_tree = NULL; | |
223f0f57 | 8028 | f->where = gfc_current_locus; |
7fd88f6e | 8029 | f->next = block->f2k_derived->finalizers; |
8030 | block->f2k_derived->finalizers = f; | |
223f0f57 | 8031 | |
8032 | first = false; | |
8033 | } | |
8034 | while (!last); | |
8035 | ||
8036 | return MATCH_YES; | |
8037 | } | |
36b0a1b0 | 8038 | |
8039 | ||
8040 | const ext_attr_t ext_attr_list[] = { | |
8041 | { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" }, | |
8042 | { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" }, | |
8043 | { "cdecl", EXT_ATTR_CDECL, "cdecl" }, | |
8044 | { "stdcall", EXT_ATTR_STDCALL, "stdcall" }, | |
8045 | { "fastcall", EXT_ATTR_FASTCALL, "fastcall" }, | |
8046 | { NULL, EXT_ATTR_LAST, NULL } | |
8047 | }; | |
8048 | ||
8049 | /* Match a !GCC$ ATTRIBUTES statement of the form: | |
8050 | !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ... | |
8051 | When we come here, we have already matched the !GCC$ ATTRIBUTES string. | |
8052 | ||
8053 | TODO: We should support all GCC attributes using the same syntax for | |
8054 | the attribute list, i.e. the list in C | |
8055 | __attributes(( attribute-list )) | |
8056 | matches then | |
8057 | !GCC$ ATTRIBUTES attribute-list :: | |
8058 | Cf. c-parser.c's c_parser_attributes; the data can then directly be | |
8059 | saved into a TREE. | |
8060 | ||
8061 | As there is absolutely no risk of confusion, we should never return | |
8062 | MATCH_NO. */ | |
8063 | match | |
8064 | gfc_match_gcc_attributes (void) | |
8065 | { | |
8066 | symbol_attribute attr; | |
8067 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
8068 | unsigned id; | |
8069 | gfc_symbol *sym; | |
8070 | match m; | |
8071 | ||
8072 | gfc_clear_attr (&attr); | |
8073 | for(;;) | |
8074 | { | |
8075 | char ch; | |
8076 | ||
8077 | if (gfc_match_name (name) != MATCH_YES) | |
8078 | return MATCH_ERROR; | |
8079 | ||
8080 | for (id = 0; id < EXT_ATTR_LAST; id++) | |
8081 | if (strcmp (name, ext_attr_list[id].name) == 0) | |
8082 | break; | |
8083 | ||
8084 | if (id == EXT_ATTR_LAST) | |
8085 | { | |
8086 | gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C"); | |
8087 | return MATCH_ERROR; | |
8088 | } | |
8089 | ||
de0c4488 | 8090 | if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus) |
36b0a1b0 | 8091 | == FAILURE) |
8092 | return MATCH_ERROR; | |
8093 | ||
8094 | gfc_gobble_whitespace (); | |
8095 | ch = gfc_next_ascii_char (); | |
8096 | if (ch == ':') | |
8097 | { | |
8098 | /* This is the successful exit condition for the loop. */ | |
8099 | if (gfc_next_ascii_char () == ':') | |
8100 | break; | |
8101 | } | |
8102 | ||
8103 | if (ch == ',') | |
8104 | continue; | |
8105 | ||
8106 | goto syntax; | |
8107 | } | |
8108 | ||
8109 | if (gfc_match_eos () == MATCH_YES) | |
8110 | goto syntax; | |
8111 | ||
8112 | for(;;) | |
8113 | { | |
8114 | m = gfc_match_name (name); | |
8115 | if (m != MATCH_YES) | |
8116 | return m; | |
8117 | ||
8118 | if (find_special (name, &sym, true)) | |
8119 | return MATCH_ERROR; | |
8120 | ||
8121 | sym->attr.ext_attr |= attr.ext_attr; | |
8122 | ||
8123 | if (gfc_match_eos () == MATCH_YES) | |
8124 | break; | |
8125 | ||
8126 | if (gfc_match_char (',') != MATCH_YES) | |
8127 | goto syntax; | |
8128 | } | |
8129 | ||
8130 | return MATCH_YES; | |
8131 | ||
8132 | syntax: | |
8133 | gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C"); | |
8134 | return MATCH_ERROR; | |
8135 | } |