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6de9cd9a | 1 | /* Declaration statement matcher |
32e8bb8e | 2 | Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009 |
636dff67 | 3 | Free Software Foundation, Inc. |
6de9cd9a DN |
4 | Contributed by Andy Vaught |
5 | ||
9fc4d79b | 6 | This file is part of GCC. |
6de9cd9a | 7 | |
9fc4d79b TS |
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 | |
d234d788 | 10 | Software Foundation; either version 3, or (at your option) any later |
9fc4d79b | 11 | version. |
6de9cd9a | 12 | |
9fc4d79b TS |
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. | |
6de9cd9a DN |
17 | |
18 | You should have received a copy of the GNU General Public License | |
d234d788 NC |
19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a | 21 | |
6de9cd9a | 22 | #include "config.h" |
d22e4895 | 23 | #include "system.h" |
6de9cd9a DN |
24 | #include "gfortran.h" |
25 | #include "match.h" | |
26 | #include "parse.h" | |
cab129d1 | 27 | #include "flags.h" |
6de9cd9a | 28 | |
ca39e6f2 FXC |
29 | |
30 | /* Macros to access allocate memory for gfc_data_variable, | |
31 | gfc_data_value and gfc_data. */ | |
ece3f663 KG |
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) | |
ca39e6f2 FXC |
35 | |
36 | ||
2054fc29 | 37 | /* This flag is set if an old-style length selector is matched |
6de9cd9a DN |
38 | during a type-declaration statement. */ |
39 | ||
40 | static int old_char_selector; | |
41 | ||
46fa431d | 42 | /* When variables acquire types and attributes from a declaration |
6de9cd9a DN |
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 | ||
a8b3b0b6 CR |
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 | ||
25d8f0a2 TS |
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 | ||
6de9cd9a DN |
86 | /* gfc_new_block points to the symbol of a newly matched block. */ |
87 | ||
88 | gfc_symbol *gfc_new_block; | |
89 | ||
1c8bcdf7 | 90 | bool gfc_matching_function; |
e2d29968 | 91 | |
6de9cd9a | 92 | |
294fbfc8 TS |
93 | /********************* DATA statement subroutines *********************/ |
94 | ||
2220652d PT |
95 | static bool in_match_data = false; |
96 | ||
97 | bool | |
98 | gfc_in_match_data (void) | |
99 | { | |
100 | return in_match_data; | |
101 | } | |
102 | ||
ca39e6f2 FXC |
103 | static void |
104 | set_in_match_data (bool set_value) | |
2220652d PT |
105 | { |
106 | in_match_data = set_value; | |
107 | } | |
108 | ||
294fbfc8 TS |
109 | /* Free a gfc_data_variable structure and everything beneath it. */ |
110 | ||
111 | static void | |
636dff67 | 112 | free_variable (gfc_data_variable *p) |
294fbfc8 TS |
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); | |
294fbfc8 TS |
122 | gfc_free (p); |
123 | } | |
124 | } | |
125 | ||
126 | ||
127 | /* Free a gfc_data_value structure and everything beneath it. */ | |
128 | ||
129 | static void | |
636dff67 | 130 | free_value (gfc_data_value *p) |
294fbfc8 TS |
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 | |
636dff67 | 146 | gfc_free_data (gfc_data *p) |
294fbfc8 TS |
147 | { |
148 | gfc_data *q; | |
149 | ||
150 | for (; p; p = q) | |
151 | { | |
152 | q = p->next; | |
294fbfc8 TS |
153 | free_variable (p->var); |
154 | free_value (p->value); | |
294fbfc8 TS |
155 | gfc_free (p); |
156 | } | |
157 | } | |
158 | ||
159 | ||
a9f6f1f2 | 160 | /* Free all data in a namespace. */ |
636dff67 | 161 | |
a9f6f1f2 | 162 | static void |
66e4ab31 | 163 | gfc_free_data_all (gfc_namespace *ns) |
a9f6f1f2 JD |
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 | ||
294fbfc8 TS |
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 | |
636dff67 | 182 | var_list (gfc_data_variable *parent) |
294fbfc8 TS |
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 | |
7b901ac4 | 235 | var_element (gfc_data_variable *new_var) |
294fbfc8 TS |
236 | { |
237 | match m; | |
238 | gfc_symbol *sym; | |
239 | ||
7b901ac4 | 240 | memset (new_var, 0, sizeof (gfc_data_variable)); |
294fbfc8 TS |
241 | |
242 | if (gfc_match_char ('(') == MATCH_YES) | |
7b901ac4 | 243 | return var_list (new_var); |
294fbfc8 | 244 | |
7b901ac4 | 245 | m = gfc_match_variable (&new_var->expr, 0); |
294fbfc8 TS |
246 | if (m != MATCH_YES) |
247 | return m; | |
248 | ||
7b901ac4 | 249 | sym = new_var->expr->symtree->n.sym; |
294fbfc8 | 250 | |
f37e928c DK |
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 | ||
636dff67 SK |
256 | if (!sym->attr.function && gfc_current_ns->parent |
257 | && gfc_current_ns->parent == sym->ns) | |
294fbfc8 | 258 | { |
4075a94e | 259 | gfc_error ("Host associated variable '%s' may not be in the DATA " |
e25a0da3 | 260 | "statement at %C", sym->name); |
294fbfc8 TS |
261 | return MATCH_ERROR; |
262 | } | |
263 | ||
4075a94e | 264 | if (gfc_current_state () != COMP_BLOCK_DATA |
636dff67 SK |
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) | |
4075a94e | 269 | return MATCH_ERROR; |
294fbfc8 | 270 | |
7b901ac4 | 271 | if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE) |
294fbfc8 TS |
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 | |
636dff67 | 281 | top_var_list (gfc_data *d) |
294fbfc8 | 282 | { |
7b901ac4 | 283 | gfc_data_variable var, *tail, *new_var; |
294fbfc8 TS |
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 | ||
7b901ac4 KG |
296 | new_var = gfc_get_data_variable (); |
297 | *new_var = var; | |
294fbfc8 TS |
298 | |
299 | if (tail == NULL) | |
7b901ac4 | 300 | d->var = new_var; |
294fbfc8 | 301 | else |
7b901ac4 | 302 | tail->next = new_var; |
294fbfc8 | 303 | |
7b901ac4 | 304 | tail = new_var; |
294fbfc8 TS |
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); | |
a9f6f1f2 | 316 | gfc_free_data_all (gfc_current_ns); |
294fbfc8 TS |
317 | return MATCH_ERROR; |
318 | } | |
319 | ||
320 | ||
321 | static match | |
636dff67 | 322 | match_data_constant (gfc_expr **result) |
294fbfc8 TS |
323 | { |
324 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
325 | gfc_symbol *sym; | |
326 | gfc_expr *expr; | |
327 | match m; | |
36d3fb4c | 328 | locus old_loc; |
294fbfc8 TS |
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 | ||
36d3fb4c PT |
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 | ||
294fbfc8 TS |
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) | |
7d1f1e61 | 376 | return gfc_match_structure_constructor (sym, result, false); |
294fbfc8 | 377 | |
d46e0870 JD |
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 | ||
294fbfc8 TS |
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 | |
636dff67 | 411 | top_val_list (gfc_data *data) |
294fbfc8 | 412 | { |
7b901ac4 | 413 | gfc_data_value *new_val, *tail; |
294fbfc8 | 414 | gfc_expr *expr; |
294fbfc8 TS |
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 | ||
7b901ac4 KG |
427 | new_val = gfc_get_data_value (); |
428 | mpz_init (new_val->repeat); | |
294fbfc8 TS |
429 | |
430 | if (tail == NULL) | |
7b901ac4 | 431 | data->value = new_val; |
294fbfc8 | 432 | else |
7b901ac4 | 433 | tail->next = new_val; |
294fbfc8 | 434 | |
7b901ac4 | 435 | tail = new_val; |
294fbfc8 TS |
436 | |
437 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
438 | { | |
439 | tail->expr = expr; | |
f2112868 | 440 | mpz_set_ui (tail->repeat, 1); |
294fbfc8 TS |
441 | } |
442 | else | |
443 | { | |
f2112868 SK |
444 | if (expr->ts.type == BT_INTEGER) |
445 | mpz_set (tail->repeat, expr->value.integer); | |
294fbfc8 | 446 | gfc_free_expr (expr); |
294fbfc8 TS |
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); | |
a9f6f1f2 | 465 | gfc_free_data_all (gfc_current_ns); |
294fbfc8 TS |
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; | |
ed0e3607 | 477 | gfc_symbol *sym; |
294fbfc8 TS |
478 | gfc_data *newdata; |
479 | ||
480 | /* Set up data structure to hold initializers. */ | |
481 | gfc_find_sym_tree (name, NULL, 0, &st); | |
ed0e3607 AL |
482 | sym = st->n.sym; |
483 | ||
294fbfc8 TS |
484 | newdata = gfc_get_data (); |
485 | newdata->var = gfc_get_data_variable (); | |
486 | newdata->var->expr = gfc_get_variable_expr (st); | |
8c5c0b80 | 487 | newdata->where = gfc_current_locus; |
294fbfc8 | 488 | |
66e4ab31 | 489 | /* Match initial value list. This also eats the terminal '/'. */ |
294fbfc8 TS |
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 | ||
ed0e3607 AL |
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 | ||
294fbfc8 TS |
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 | ||
636dff67 | 518 | |
294fbfc8 | 519 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
13795658 | 520 | we are matching a DATA statement and are therefore issuing an error |
d51347f9 | 521 | if we encounter something unexpected, if not, we're trying to match |
69de3b83 | 522 | an old-style initialization expression of the form INTEGER I /2/. */ |
294fbfc8 TS |
523 | |
524 | match | |
525 | gfc_match_data (void) | |
526 | { | |
7b901ac4 | 527 | gfc_data *new_data; |
294fbfc8 TS |
528 | match m; |
529 | ||
ca39e6f2 | 530 | set_in_match_data (true); |
2220652d | 531 | |
294fbfc8 TS |
532 | for (;;) |
533 | { | |
7b901ac4 KG |
534 | new_data = gfc_get_data (); |
535 | new_data->where = gfc_current_locus; | |
294fbfc8 | 536 | |
7b901ac4 | 537 | m = top_var_list (new_data); |
294fbfc8 TS |
538 | if (m != MATCH_YES) |
539 | goto cleanup; | |
540 | ||
7b901ac4 | 541 | m = top_val_list (new_data); |
294fbfc8 TS |
542 | if (m != MATCH_YES) |
543 | goto cleanup; | |
544 | ||
7b901ac4 KG |
545 | new_data->next = gfc_current_ns->data; |
546 | gfc_current_ns->data = new_data; | |
294fbfc8 TS |
547 | |
548 | if (gfc_match_eos () == MATCH_YES) | |
549 | break; | |
550 | ||
551 | gfc_match_char (','); /* Optional comma */ | |
552 | } | |
553 | ||
ca39e6f2 | 554 | set_in_match_data (false); |
2220652d | 555 | |
294fbfc8 TS |
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: | |
ca39e6f2 | 565 | set_in_match_data (false); |
7b901ac4 | 566 | gfc_free_data (new_data); |
294fbfc8 TS |
567 | return MATCH_ERROR; |
568 | } | |
569 | ||
570 | ||
571 | /************************ Declaration statements *********************/ | |
572 | ||
6de9cd9a DN |
573 | /* Match an intent specification. Since this can only happen after an |
574 | INTENT word, a legal intent-spec must follow. */ | |
575 | ||
576 | static sym_intent | |
577 | match_intent_spec (void) | |
578 | { | |
579 | ||
580 | if (gfc_match (" ( in out )") == MATCH_YES) | |
581 | return INTENT_INOUT; | |
582 | if (gfc_match (" ( in )") == MATCH_YES) | |
583 | return INTENT_IN; | |
584 | if (gfc_match (" ( out )") == MATCH_YES) | |
585 | return INTENT_OUT; | |
586 | ||
587 | gfc_error ("Bad INTENT specification at %C"); | |
588 | return INTENT_UNKNOWN; | |
589 | } | |
590 | ||
591 | ||
592 | /* Matches a character length specification, which is either a | |
593 | specification expression or a '*'. */ | |
594 | ||
595 | static match | |
636dff67 | 596 | char_len_param_value (gfc_expr **expr) |
6de9cd9a | 597 | { |
cba28dad JD |
598 | match m; |
599 | ||
6de9cd9a DN |
600 | if (gfc_match_char ('*') == MATCH_YES) |
601 | { | |
602 | *expr = NULL; | |
603 | return MATCH_YES; | |
604 | } | |
605 | ||
cba28dad | 606 | m = gfc_match_expr (expr); |
f37e928c DK |
607 | |
608 | if (m == MATCH_YES | |
609 | && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE) | |
610 | return MATCH_ERROR; | |
611 | ||
cba28dad JD |
612 | if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION) |
613 | { | |
614 | if ((*expr)->value.function.actual | |
615 | && (*expr)->value.function.actual->expr->symtree) | |
616 | { | |
617 | gfc_expr *e; | |
618 | e = (*expr)->value.function.actual->expr; | |
619 | if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE | |
620 | && e->expr_type == EXPR_VARIABLE) | |
621 | { | |
622 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) | |
623 | goto syntax; | |
624 | if (e->symtree->n.sym->ts.type == BT_CHARACTER | |
625 | && e->symtree->n.sym->ts.cl | |
626 | && e->symtree->n.sym->ts.cl->length->ts.type == BT_UNKNOWN) | |
627 | goto syntax; | |
628 | } | |
629 | } | |
630 | } | |
631 | return m; | |
632 | ||
633 | syntax: | |
634 | gfc_error ("Conflict in attributes of function argument at %C"); | |
635 | return MATCH_ERROR; | |
6de9cd9a DN |
636 | } |
637 | ||
638 | ||
639 | /* A character length is a '*' followed by a literal integer or a | |
640 | char_len_param_value in parenthesis. */ | |
641 | ||
642 | static match | |
636dff67 | 643 | match_char_length (gfc_expr **expr) |
6de9cd9a | 644 | { |
5cf54585 | 645 | int length; |
6de9cd9a DN |
646 | match m; |
647 | ||
648 | m = gfc_match_char ('*'); | |
649 | if (m != MATCH_YES) | |
650 | return m; | |
651 | ||
5cf54585 | 652 | m = gfc_match_small_literal_int (&length, NULL); |
6de9cd9a DN |
653 | if (m == MATCH_ERROR) |
654 | return m; | |
655 | ||
656 | if (m == MATCH_YES) | |
657 | { | |
e2ab8b09 JW |
658 | if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: " |
659 | "Old-style character length at %C") == FAILURE) | |
660 | return MATCH_ERROR; | |
6de9cd9a DN |
661 | *expr = gfc_int_expr (length); |
662 | return m; | |
663 | } | |
664 | ||
665 | if (gfc_match_char ('(') == MATCH_NO) | |
666 | goto syntax; | |
667 | ||
668 | m = char_len_param_value (expr); | |
1c8bcdf7 PT |
669 | if (m != MATCH_YES && gfc_matching_function) |
670 | { | |
671 | gfc_undo_symbols (); | |
672 | m = MATCH_YES; | |
673 | } | |
674 | ||
6de9cd9a DN |
675 | if (m == MATCH_ERROR) |
676 | return m; | |
677 | if (m == MATCH_NO) | |
678 | goto syntax; | |
679 | ||
680 | if (gfc_match_char (')') == MATCH_NO) | |
681 | { | |
682 | gfc_free_expr (*expr); | |
683 | *expr = NULL; | |
684 | goto syntax; | |
685 | } | |
686 | ||
687 | return MATCH_YES; | |
688 | ||
689 | syntax: | |
690 | gfc_error ("Syntax error in character length specification at %C"); | |
691 | return MATCH_ERROR; | |
692 | } | |
693 | ||
694 | ||
9e35b386 EE |
695 | /* Special subroutine for finding a symbol. Check if the name is found |
696 | in the current name space. If not, and we're compiling a function or | |
697 | subroutine and the parent compilation unit is an interface, then check | |
698 | to see if the name we've been given is the name of the interface | |
699 | (located in another namespace). */ | |
6de9cd9a DN |
700 | |
701 | static int | |
08a6b8e0 | 702 | find_special (const char *name, gfc_symbol **result, bool allow_subroutine) |
6de9cd9a DN |
703 | { |
704 | gfc_state_data *s; | |
08a6b8e0 | 705 | gfc_symtree *st; |
9e35b386 | 706 | int i; |
6de9cd9a | 707 | |
08a6b8e0 | 708 | i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine); |
d51347f9 | 709 | if (i == 0) |
08a6b8e0 TB |
710 | { |
711 | *result = st ? st->n.sym : NULL; | |
712 | goto end; | |
713 | } | |
d51347f9 | 714 | |
6de9cd9a DN |
715 | if (gfc_current_state () != COMP_SUBROUTINE |
716 | && gfc_current_state () != COMP_FUNCTION) | |
9e35b386 | 717 | goto end; |
6de9cd9a DN |
718 | |
719 | s = gfc_state_stack->previous; | |
720 | if (s == NULL) | |
9e35b386 | 721 | goto end; |
6de9cd9a DN |
722 | |
723 | if (s->state != COMP_INTERFACE) | |
9e35b386 | 724 | goto end; |
6de9cd9a | 725 | if (s->sym == NULL) |
66e4ab31 | 726 | goto end; /* Nameless interface. */ |
6de9cd9a DN |
727 | |
728 | if (strcmp (name, s->sym->name) == 0) | |
729 | { | |
730 | *result = s->sym; | |
731 | return 0; | |
732 | } | |
733 | ||
9e35b386 EE |
734 | end: |
735 | return i; | |
6de9cd9a DN |
736 | } |
737 | ||
738 | ||
739 | /* Special subroutine for getting a symbol node associated with a | |
740 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
741 | symbol is created in the parent using with symtree node in the | |
742 | child unit pointing to the symbol. If the current namespace has no | |
743 | parent, then the symbol is just created in the current unit. */ | |
744 | ||
745 | static int | |
636dff67 | 746 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
6de9cd9a DN |
747 | { |
748 | gfc_symtree *st; | |
749 | gfc_symbol *sym; | |
a7ca4d8d | 750 | int rc = 0; |
6de9cd9a | 751 | |
1a492601 PT |
752 | /* Module functions have to be left in their own namespace because |
753 | they have potentially (almost certainly!) already been referenced. | |
754 | In this sense, they are rather like external functions. This is | |
755 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
756 | space is set to point to the master function, so that the fake | |
757 | result mechanism can work. */ | |
758 | if (module_fcn_entry) | |
6c12686b PT |
759 | { |
760 | /* Present if entry is declared to be a module procedure. */ | |
761 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); | |
aa84a9a5 | 762 | |
6c12686b PT |
763 | if (*result == NULL) |
764 | rc = gfc_get_symbol (name, NULL, result); | |
2e32a71e | 765 | else if (!gfc_get_symbol (name, NULL, &sym) && sym |
aa84a9a5 PT |
766 | && (*result)->ts.type == BT_UNKNOWN |
767 | && sym->attr.flavor == FL_UNKNOWN) | |
768 | /* Pick up the typespec for the entry, if declared in the function | |
769 | body. Note that this symbol is FL_UNKNOWN because it will | |
770 | only have appeared in a type declaration. The local symtree | |
771 | is set to point to the module symbol and a unique symtree | |
772 | to the local version. This latter ensures a correct clearing | |
773 | of the symbols. */ | |
2e32a71e PT |
774 | { |
775 | /* If the ENTRY proceeds its specification, we need to ensure | |
776 | that this does not raise a "has no IMPLICIT type" error. */ | |
777 | if (sym->ts.type == BT_UNKNOWN) | |
0e5a218b | 778 | sym->attr.untyped = 1; |
2e32a71e | 779 | |
0e5a218b | 780 | (*result)->ts = sym->ts; |
2e32a71e PT |
781 | |
782 | /* Put the symbol in the procedure namespace so that, should | |
df2fba9e | 783 | the ENTRY precede its specification, the specification |
2e32a71e PT |
784 | can be applied. */ |
785 | (*result)->ns = gfc_current_ns; | |
786 | ||
787 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); | |
788 | st->n.sym = *result; | |
789 | st = gfc_get_unique_symtree (gfc_current_ns); | |
790 | st->n.sym = sym; | |
791 | } | |
6c12686b | 792 | } |
68ea355b PT |
793 | else |
794 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
6de9cd9a | 795 | |
a7ca4d8d PT |
796 | if (rc) |
797 | return rc; | |
798 | ||
68ea355b | 799 | sym = *result; |
2c693a24 | 800 | gfc_current_ns->refs++; |
6de9cd9a | 801 | |
7b901ac4 | 802 | if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE) |
68ea355b | 803 | { |
cda7004b PT |
804 | /* Trap another encompassed procedure with the same name. All |
805 | these conditions are necessary to avoid picking up an entry | |
806 | whose name clashes with that of the encompassing procedure; | |
807 | this is handled using gsymbols to register unique,globally | |
808 | accessible names. */ | |
68ea355b | 809 | if (sym->attr.flavor != 0 |
636dff67 SK |
810 | && sym->attr.proc != 0 |
811 | && (sym->attr.subroutine || sym->attr.function) | |
812 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
68ea355b PT |
813 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
814 | name, &sym->declared_at); | |
815 | ||
fd3e70af JD |
816 | /* Trap a procedure with a name the same as interface in the |
817 | encompassing scope. */ | |
818 | if (sym->attr.generic != 0 | |
2305fa31 JD |
819 | && (sym->attr.subroutine || sym->attr.function) |
820 | && !sym->attr.mod_proc) | |
fd3e70af JD |
821 | gfc_error_now ("Name '%s' at %C is already defined" |
822 | " as a generic interface at %L", | |
823 | name, &sym->declared_at); | |
824 | ||
68ea355b PT |
825 | /* Trap declarations of attributes in encompassing scope. The |
826 | signature for this is that ts.kind is set. Legitimate | |
827 | references only set ts.type. */ | |
828 | if (sym->ts.kind != 0 | |
636dff67 SK |
829 | && !sym->attr.implicit_type |
830 | && sym->attr.proc == 0 | |
831 | && gfc_current_ns->parent != NULL | |
832 | && sym->attr.access == 0 | |
833 | && !module_fcn_entry) | |
834 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
835 | "and must not have attributes declared at %L", | |
68ea355b PT |
836 | name, &sym->declared_at); |
837 | } | |
838 | ||
839 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
840 | return rc; | |
6de9cd9a | 841 | |
1a492601 PT |
842 | /* Module function entries will already have a symtree in |
843 | the current namespace but will need one at module level. */ | |
844 | if (module_fcn_entry) | |
6c12686b PT |
845 | { |
846 | /* Present if entry is declared to be a module procedure. */ | |
847 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); | |
848 | if (st == NULL) | |
849 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
850 | } | |
1a492601 PT |
851 | else |
852 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
6de9cd9a | 853 | |
6de9cd9a DN |
854 | st->n.sym = sym; |
855 | sym->refs++; | |
856 | ||
66e4ab31 | 857 | /* See if the procedure should be a module procedure. */ |
6de9cd9a | 858 | |
1a492601 | 859 | if (((sym->ns->proc_name != NULL |
6c12686b PT |
860 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
861 | && sym->attr.proc != PROC_MODULE) | |
862 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) | |
863 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
864 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
865 | rc = 2; |
866 | ||
867 | return rc; | |
868 | } | |
869 | ||
870 | ||
a8b3b0b6 CR |
871 | /* Verify that the given symbol representing a parameter is C |
872 | interoperable, by checking to see if it was marked as such after | |
873 | its declaration. If the given symbol is not interoperable, a | |
874 | warning is reported, thus removing the need to return the status to | |
875 | the calling function. The standard does not require the user use | |
876 | one of the iso_c_binding named constants to declare an | |
877 | interoperable parameter, but we can't be sure if the param is C | |
878 | interop or not if the user doesn't. For example, integer(4) may be | |
879 | legal Fortran, but doesn't have meaning in C. It may interop with | |
880 | a number of the C types, which causes a problem because the | |
881 | compiler can't know which one. This code is almost certainly not | |
882 | portable, and the user will get what they deserve if the C type | |
883 | across platforms isn't always interoperable with integer(4). If | |
884 | the user had used something like integer(c_int) or integer(c_long), | |
885 | the compiler could have automatically handled the varying sizes | |
886 | across platforms. */ | |
887 | ||
17b1d2a0 | 888 | gfc_try |
a8b3b0b6 CR |
889 | verify_c_interop_param (gfc_symbol *sym) |
890 | { | |
891 | int is_c_interop = 0; | |
17b1d2a0 | 892 | gfc_try retval = SUCCESS; |
a8b3b0b6 CR |
893 | |
894 | /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). | |
895 | Don't repeat the checks here. */ | |
896 | if (sym->attr.implicit_type) | |
897 | return SUCCESS; | |
898 | ||
899 | /* For subroutines or functions that are passed to a BIND(C) procedure, | |
900 | they're interoperable if they're BIND(C) and their params are all | |
901 | interoperable. */ | |
902 | if (sym->attr.flavor == FL_PROCEDURE) | |
903 | { | |
904 | if (sym->attr.is_bind_c == 0) | |
905 | { | |
906 | gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " | |
907 | "attribute to be C interoperable", sym->name, | |
908 | &(sym->declared_at)); | |
909 | ||
910 | return FAILURE; | |
911 | } | |
912 | else | |
913 | { | |
914 | if (sym->attr.is_c_interop == 1) | |
915 | /* We've already checked this procedure; don't check it again. */ | |
916 | return SUCCESS; | |
917 | else | |
918 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, | |
919 | sym->common_block); | |
920 | } | |
921 | } | |
922 | ||
923 | /* See if we've stored a reference to a procedure that owns sym. */ | |
924 | if (sym->ns != NULL && sym->ns->proc_name != NULL) | |
925 | { | |
926 | if (sym->ns->proc_name->attr.is_bind_c == 1) | |
927 | { | |
928 | is_c_interop = | |
2ec855f1 | 929 | (verify_c_interop (&(sym->ts)) |
a8b3b0b6 CR |
930 | == SUCCESS ? 1 : 0); |
931 | ||
932 | if (is_c_interop != 1) | |
933 | { | |
934 | /* Make personalized messages to give better feedback. */ | |
935 | if (sym->ts.type == BT_DERIVED) | |
936 | gfc_error ("Type '%s' at %L is a parameter to the BIND(C) " | |
937 | " procedure '%s' but is not C interoperable " | |
938 | "because derived type '%s' is not C interoperable", | |
939 | sym->name, &(sym->declared_at), | |
940 | sym->ns->proc_name->name, | |
941 | sym->ts.derived->name); | |
942 | else | |
943 | gfc_warning ("Variable '%s' at %L is a parameter to the " | |
944 | "BIND(C) procedure '%s' but may not be C " | |
945 | "interoperable", | |
946 | sym->name, &(sym->declared_at), | |
947 | sym->ns->proc_name->name); | |
948 | } | |
aa5e22f0 CR |
949 | |
950 | /* Character strings are only C interoperable if they have a | |
951 | length of 1. */ | |
952 | if (sym->ts.type == BT_CHARACTER) | |
953 | { | |
954 | gfc_charlen *cl = sym->ts.cl; | |
955 | if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT | |
956 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) | |
957 | { | |
958 | gfc_error ("Character argument '%s' at %L " | |
959 | "must be length 1 because " | |
960 | "procedure '%s' is BIND(C)", | |
961 | sym->name, &sym->declared_at, | |
962 | sym->ns->proc_name->name); | |
963 | retval = FAILURE; | |
964 | } | |
965 | } | |
966 | ||
a8b3b0b6 CR |
967 | /* We have to make sure that any param to a bind(c) routine does |
968 | not have the allocatable, pointer, or optional attributes, | |
969 | according to J3/04-007, section 5.1. */ | |
970 | if (sym->attr.allocatable == 1) | |
971 | { | |
972 | gfc_error ("Variable '%s' at %L cannot have the " | |
973 | "ALLOCATABLE attribute because procedure '%s'" | |
974 | " is BIND(C)", sym->name, &(sym->declared_at), | |
975 | sym->ns->proc_name->name); | |
976 | retval = FAILURE; | |
977 | } | |
978 | ||
979 | if (sym->attr.pointer == 1) | |
980 | { | |
981 | gfc_error ("Variable '%s' at %L cannot have the " | |
982 | "POINTER attribute because procedure '%s'" | |
983 | " is BIND(C)", sym->name, &(sym->declared_at), | |
984 | sym->ns->proc_name->name); | |
985 | retval = FAILURE; | |
986 | } | |
987 | ||
988 | if (sym->attr.optional == 1) | |
989 | { | |
990 | gfc_error ("Variable '%s' at %L cannot have the " | |
991 | "OPTIONAL attribute because procedure '%s'" | |
992 | " is BIND(C)", sym->name, &(sym->declared_at), | |
993 | sym->ns->proc_name->name); | |
994 | retval = FAILURE; | |
995 | } | |
996 | ||
997 | /* Make sure that if it has the dimension attribute, that it is | |
998 | either assumed size or explicit shape. */ | |
999 | if (sym->as != NULL) | |
1000 | { | |
1001 | if (sym->as->type == AS_ASSUMED_SHAPE) | |
1002 | { | |
1003 | gfc_error ("Assumed-shape array '%s' at %L cannot be an " | |
1004 | "argument to the procedure '%s' at %L because " | |
1005 | "the procedure is BIND(C)", sym->name, | |
1006 | &(sym->declared_at), sym->ns->proc_name->name, | |
1007 | &(sym->ns->proc_name->declared_at)); | |
1008 | retval = FAILURE; | |
1009 | } | |
1010 | ||
1011 | if (sym->as->type == AS_DEFERRED) | |
1012 | { | |
1013 | gfc_error ("Deferred-shape array '%s' at %L cannot be an " | |
1014 | "argument to the procedure '%s' at %L because " | |
1015 | "the procedure is BIND(C)", sym->name, | |
1016 | &(sym->declared_at), sym->ns->proc_name->name, | |
1017 | &(sym->ns->proc_name->declared_at)); | |
1018 | retval = FAILURE; | |
1019 | } | |
1020 | } | |
1021 | } | |
1022 | } | |
1023 | ||
1024 | return retval; | |
1025 | } | |
1026 | ||
1027 | ||
1028 | /* Function called by variable_decl() that adds a name to the symbol table. */ | |
6de9cd9a | 1029 | |
17b1d2a0 | 1030 | static gfc_try |
636dff67 SK |
1031 | build_sym (const char *name, gfc_charlen *cl, |
1032 | gfc_array_spec **as, locus *var_locus) | |
6de9cd9a DN |
1033 | { |
1034 | symbol_attribute attr; | |
1035 | gfc_symbol *sym; | |
1036 | ||
9e35b386 | 1037 | if (gfc_get_symbol (name, NULL, &sym)) |
6de9cd9a DN |
1038 | return FAILURE; |
1039 | ||
66e4ab31 | 1040 | /* Start updating the symbol table. Add basic type attribute if present. */ |
6de9cd9a | 1041 | if (current_ts.type != BT_UNKNOWN |
636dff67 SK |
1042 | && (sym->attr.implicit_type == 0 |
1043 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
6de9cd9a DN |
1044 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
1045 | return FAILURE; | |
1046 | ||
1047 | if (sym->ts.type == BT_CHARACTER) | |
1048 | sym->ts.cl = cl; | |
1049 | ||
1050 | /* Add dimension attribute if present. */ | |
1051 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
1052 | return FAILURE; | |
1053 | *as = NULL; | |
1054 | ||
1055 | /* Add attribute to symbol. The copy is so that we can reset the | |
1056 | dimension attribute. */ | |
1057 | attr = current_attr; | |
1058 | attr.dimension = 0; | |
1059 | ||
1060 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
1061 | return FAILURE; | |
1062 | ||
a8b3b0b6 CR |
1063 | /* Finish any work that may need to be done for the binding label, |
1064 | if it's a bind(c). The bind(c) attr is found before the symbol | |
1065 | is made, and before the symbol name (for data decls), so the | |
1066 | current_ts is holding the binding label, or nothing if the | |
1067 | name= attr wasn't given. Therefore, test here if we're dealing | |
1068 | with a bind(c) and make sure the binding label is set correctly. */ | |
1069 | if (sym->attr.is_bind_c == 1) | |
1070 | { | |
1071 | if (sym->binding_label[0] == '\0') | |
1072 | { | |
ad4a2f64 TB |
1073 | /* Set the binding label and verify that if a NAME= was specified |
1074 | then only one identifier was in the entity-decl-list. */ | |
1075 | if (set_binding_label (sym->binding_label, sym->name, | |
1076 | num_idents_on_line) == FAILURE) | |
a8b3b0b6 CR |
1077 | return FAILURE; |
1078 | } | |
1079 | } | |
1080 | ||
1081 | /* See if we know we're in a common block, and if it's a bind(c) | |
1082 | common then we need to make sure we're an interoperable type. */ | |
1083 | if (sym->attr.in_common == 1) | |
1084 | { | |
1085 | /* Test the common block object. */ | |
1086 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 | |
1087 | && sym->ts.is_c_interop != 1) | |
1088 | { | |
1089 | gfc_error_now ("Variable '%s' in common block '%s' at %C " | |
1090 | "must be declared with a C interoperable " | |
1091 | "kind since common block '%s' is BIND(C)", | |
1092 | sym->name, sym->common_block->name, | |
1093 | sym->common_block->name); | |
1094 | gfc_clear_error (); | |
1095 | } | |
1096 | } | |
1097 | ||
9a3db5a3 PT |
1098 | sym->attr.implied_index = 0; |
1099 | ||
6de9cd9a DN |
1100 | return SUCCESS; |
1101 | } | |
1102 | ||
636dff67 | 1103 | |
df7cc9b5 | 1104 | /* Set character constant to the given length. The constant will be padded or |
d2848082 DK |
1105 | truncated. If we're inside an array constructor without a typespec, we |
1106 | additionally check that all elements have the same length; check_len -1 | |
1107 | means no checking. */ | |
df7cc9b5 FW |
1108 | |
1109 | void | |
d2848082 | 1110 | gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len) |
df7cc9b5 | 1111 | { |
00660189 | 1112 | gfc_char_t *s; |
df7cc9b5 FW |
1113 | int slen; |
1114 | ||
1115 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
d393bbd7 | 1116 | gcc_assert (expr->ts.type == BT_CHARACTER); |
df7cc9b5 FW |
1117 | |
1118 | slen = expr->value.character.length; | |
1119 | if (len != slen) | |
1120 | { | |
00660189 FXC |
1121 | s = gfc_get_wide_string (len + 1); |
1122 | memcpy (s, expr->value.character.string, | |
1123 | MIN (len, slen) * sizeof (gfc_char_t)); | |
df7cc9b5 | 1124 | if (len > slen) |
00660189 | 1125 | gfc_wide_memset (&s[slen], ' ', len - slen); |
2220652d PT |
1126 | |
1127 | if (gfc_option.warn_character_truncation && slen > len) | |
1128 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
1129 | "(%d/%d)", &expr->where, slen, len); | |
1130 | ||
1131 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
1132 | initializers. */ | |
d2848082 DK |
1133 | if (check_len != -1 && slen != check_len |
1134 | && !(gfc_option.allow_std & GFC_STD_GNU)) | |
2220652d PT |
1135 | gfc_error_now ("The CHARACTER elements of the array constructor " |
1136 | "at %L must have the same length (%d/%d)", | |
d2848082 | 1137 | &expr->where, slen, check_len); |
2220652d | 1138 | |
150675a8 | 1139 | s[len] = '\0'; |
df7cc9b5 FW |
1140 | gfc_free (expr->value.character.string); |
1141 | expr->value.character.string = s; | |
1142 | expr->value.character.length = len; | |
1143 | } | |
1144 | } | |
6de9cd9a | 1145 | |
25d8f0a2 | 1146 | |
d51347f9 | 1147 | /* Function to create and update the enumerator history |
25d8f0a2 | 1148 | using the information passed as arguments. |
d51347f9 TB |
1149 | Pointer "max_enum" is also updated, to point to |
1150 | enum history node containing largest initializer. | |
25d8f0a2 TS |
1151 | |
1152 | SYM points to the symbol node of enumerator. | |
66e4ab31 | 1153 | INIT points to its enumerator value. */ |
25d8f0a2 | 1154 | |
d51347f9 | 1155 | static void |
636dff67 | 1156 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
25d8f0a2 TS |
1157 | { |
1158 | enumerator_history *new_enum_history; | |
1159 | gcc_assert (sym != NULL && init != NULL); | |
1160 | ||
ece3f663 | 1161 | new_enum_history = XCNEW (enumerator_history); |
25d8f0a2 TS |
1162 | |
1163 | new_enum_history->sym = sym; | |
1164 | new_enum_history->initializer = init; | |
1165 | new_enum_history->next = NULL; | |
1166 | ||
1167 | if (enum_history == NULL) | |
1168 | { | |
1169 | enum_history = new_enum_history; | |
1170 | max_enum = enum_history; | |
1171 | } | |
1172 | else | |
1173 | { | |
1174 | new_enum_history->next = enum_history; | |
1175 | enum_history = new_enum_history; | |
1176 | ||
d51347f9 | 1177 | if (mpz_cmp (max_enum->initializer->value.integer, |
25d8f0a2 | 1178 | new_enum_history->initializer->value.integer) < 0) |
636dff67 | 1179 | max_enum = new_enum_history; |
25d8f0a2 TS |
1180 | } |
1181 | } | |
1182 | ||
1183 | ||
d51347f9 | 1184 | /* Function to free enum kind history. */ |
25d8f0a2 | 1185 | |
d51347f9 | 1186 | void |
636dff67 | 1187 | gfc_free_enum_history (void) |
25d8f0a2 | 1188 | { |
d51347f9 TB |
1189 | enumerator_history *current = enum_history; |
1190 | enumerator_history *next; | |
25d8f0a2 TS |
1191 | |
1192 | while (current != NULL) | |
1193 | { | |
1194 | next = current->next; | |
1195 | gfc_free (current); | |
1196 | current = next; | |
1197 | } | |
1198 | max_enum = NULL; | |
1199 | enum_history = NULL; | |
1200 | } | |
1201 | ||
1202 | ||
6de9cd9a DN |
1203 | /* Function called by variable_decl() that adds an initialization |
1204 | expression to a symbol. */ | |
1205 | ||
17b1d2a0 | 1206 | static gfc_try |
66e4ab31 | 1207 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) |
6de9cd9a DN |
1208 | { |
1209 | symbol_attribute attr; | |
1210 | gfc_symbol *sym; | |
1211 | gfc_expr *init; | |
1212 | ||
1213 | init = *initp; | |
08a6b8e0 | 1214 | if (find_special (name, &sym, false)) |
6de9cd9a DN |
1215 | return FAILURE; |
1216 | ||
1217 | attr = sym->attr; | |
1218 | ||
1219 | /* If this symbol is confirming an implicit parameter type, | |
1220 | then an initialization expression is not allowed. */ | |
1221 | if (attr.flavor == FL_PARAMETER | |
1222 | && sym->value != NULL | |
1223 | && *initp != NULL) | |
1224 | { | |
1225 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
1226 | sym->name); | |
1227 | return FAILURE; | |
1228 | } | |
1229 | ||
1230 | if (init == NULL) | |
1231 | { | |
1232 | /* An initializer is required for PARAMETER declarations. */ | |
1233 | if (attr.flavor == FL_PARAMETER) | |
1234 | { | |
1235 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
1236 | return FAILURE; | |
1237 | } | |
1238 | } | |
1239 | else | |
1240 | { | |
1241 | /* If a variable appears in a DATA block, it cannot have an | |
1de8a836 | 1242 | initializer. */ |
6de9cd9a DN |
1243 | if (sym->attr.data) |
1244 | { | |
636dff67 SK |
1245 | gfc_error ("Variable '%s' at %C with an initializer already " |
1246 | "appears in a DATA statement", sym->name); | |
6de9cd9a DN |
1247 | return FAILURE; |
1248 | } | |
1249 | ||
75d17889 TS |
1250 | /* Check if the assignment can happen. This has to be put off |
1251 | until later for a derived type variable. */ | |
6de9cd9a DN |
1252 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
1253 | && gfc_check_assign_symbol (sym, init) == FAILURE) | |
1254 | return FAILURE; | |
1255 | ||
51b128a0 PT |
1256 | if (sym->ts.type == BT_CHARACTER && sym->ts.cl |
1257 | && init->ts.type == BT_CHARACTER) | |
df7cc9b5 FW |
1258 | { |
1259 | /* Update symbol character length according initializer. */ | |
51b128a0 PT |
1260 | if (gfc_check_assign_symbol (sym, init) == FAILURE) |
1261 | return FAILURE; | |
1262 | ||
df7cc9b5 FW |
1263 | if (sym->ts.cl->length == NULL) |
1264 | { | |
a99288e5 | 1265 | int clen; |
66e4ab31 SK |
1266 | /* If there are multiple CHARACTER variables declared on the |
1267 | same line, we don't want them to share the same length. */ | |
bfce226c | 1268 | sym->ts.cl = gfc_new_charlen (gfc_current_ns); |
96f4873b | 1269 | |
a99288e5 PT |
1270 | if (sym->attr.flavor == FL_PARAMETER) |
1271 | { | |
1272 | if (init->expr_type == EXPR_CONSTANT) | |
1273 | { | |
1274 | clen = init->value.character.length; | |
1275 | sym->ts.cl->length = gfc_int_expr (clen); | |
1276 | } | |
1277 | else if (init->expr_type == EXPR_ARRAY) | |
1278 | { | |
1279 | gfc_expr *p = init->value.constructor->expr; | |
1280 | clen = p->value.character.length; | |
1281 | sym->ts.cl->length = gfc_int_expr (clen); | |
1282 | } | |
1283 | else if (init->ts.cl && init->ts.cl->length) | |
1284 | sym->ts.cl->length = | |
1285 | gfc_copy_expr (sym->value->ts.cl->length); | |
1286 | } | |
df7cc9b5 FW |
1287 | } |
1288 | /* Update initializer character length according symbol. */ | |
1289 | else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT) | |
1290 | { | |
1291 | int len = mpz_get_si (sym->ts.cl->length->value.integer); | |
1292 | gfc_constructor * p; | |
1293 | ||
1294 | if (init->expr_type == EXPR_CONSTANT) | |
d2848082 | 1295 | gfc_set_constant_character_len (len, init, -1); |
df7cc9b5 FW |
1296 | else if (init->expr_type == EXPR_ARRAY) |
1297 | { | |
dcdc7b6c PT |
1298 | /* Build a new charlen to prevent simplification from |
1299 | deleting the length before it is resolved. */ | |
bfce226c | 1300 | init->ts.cl = gfc_new_charlen (gfc_current_ns); |
df7cc9b5 | 1301 | init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length); |
dcdc7b6c | 1302 | |
df7cc9b5 | 1303 | for (p = init->value.constructor; p; p = p->next) |
d2848082 | 1304 | gfc_set_constant_character_len (len, p->expr, -1); |
df7cc9b5 FW |
1305 | } |
1306 | } | |
1307 | } | |
1308 | ||
a8b3b0b6 CR |
1309 | /* Need to check if the expression we initialized this |
1310 | to was one of the iso_c_binding named constants. If so, | |
1311 | and we're a parameter (constant), let it be iso_c. | |
1312 | For example: | |
1313 | integer(c_int), parameter :: my_int = c_int | |
1314 | integer(my_int) :: my_int_2 | |
1315 | If we mark my_int as iso_c (since we can see it's value | |
1316 | is equal to one of the named constants), then my_int_2 | |
1317 | will be considered C interoperable. */ | |
1318 | if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) | |
1319 | { | |
1320 | sym->ts.is_iso_c |= init->ts.is_iso_c; | |
1321 | sym->ts.is_c_interop |= init->ts.is_c_interop; | |
1322 | /* attr bits needed for module files. */ | |
1323 | sym->attr.is_iso_c |= init->ts.is_iso_c; | |
1324 | sym->attr.is_c_interop |= init->ts.is_c_interop; | |
1325 | if (init->ts.is_iso_c) | |
1326 | sym->ts.f90_type = init->ts.f90_type; | |
1327 | } | |
1328 | ||
6de9cd9a DN |
1329 | /* Add initializer. Make sure we keep the ranks sane. */ |
1330 | if (sym->attr.dimension && init->rank == 0) | |
a9b43781 PT |
1331 | { |
1332 | mpz_t size; | |
1333 | gfc_expr *array; | |
1334 | gfc_constructor *c; | |
1335 | int n; | |
1336 | if (sym->attr.flavor == FL_PARAMETER | |
1337 | && init->expr_type == EXPR_CONSTANT | |
1338 | && spec_size (sym->as, &size) == SUCCESS | |
1339 | && mpz_cmp_si (size, 0) > 0) | |
1340 | { | |
1341 | array = gfc_start_constructor (init->ts.type, init->ts.kind, | |
1342 | &init->where); | |
1343 | ||
1344 | array->value.constructor = c = NULL; | |
1345 | for (n = 0; n < (int)mpz_get_si (size); n++) | |
1346 | { | |
1347 | if (array->value.constructor == NULL) | |
1348 | { | |
1349 | array->value.constructor = c = gfc_get_constructor (); | |
1350 | c->expr = init; | |
1351 | } | |
1352 | else | |
1353 | { | |
1354 | c->next = gfc_get_constructor (); | |
1355 | c = c->next; | |
1356 | c->expr = gfc_copy_expr (init); | |
1357 | } | |
1358 | } | |
1359 | ||
1360 | array->shape = gfc_get_shape (sym->as->rank); | |
1361 | for (n = 0; n < sym->as->rank; n++) | |
1362 | spec_dimen_size (sym->as, n, &array->shape[n]); | |
1363 | ||
1364 | init = array; | |
1365 | mpz_clear (size); | |
1366 | } | |
1367 | init->rank = sym->as->rank; | |
1368 | } | |
6de9cd9a DN |
1369 | |
1370 | sym->value = init; | |
ef7236d2 DF |
1371 | if (sym->attr.save == SAVE_NONE) |
1372 | sym->attr.save = SAVE_IMPLICIT; | |
6de9cd9a DN |
1373 | *initp = NULL; |
1374 | } | |
1375 | ||
1376 | return SUCCESS; | |
1377 | } | |
1378 | ||
1379 | ||
1380 | /* Function called by variable_decl() that adds a name to a structure | |
1381 | being built. */ | |
1382 | ||
17b1d2a0 | 1383 | static gfc_try |
636dff67 SK |
1384 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
1385 | gfc_array_spec **as) | |
6de9cd9a DN |
1386 | { |
1387 | gfc_component *c; | |
1388 | ||
1389 | /* If the current symbol is of the same derived type that we're | |
1390 | constructing, it must have the pointer attribute. */ | |
1391 | if (current_ts.type == BT_DERIVED | |
1392 | && current_ts.derived == gfc_current_block () | |
1393 | && current_attr.pointer == 0) | |
1394 | { | |
1395 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1396 | return FAILURE; | |
1397 | } | |
1398 | ||
636dff67 | 1399 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
6de9cd9a DN |
1400 | { |
1401 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1402 | { | |
1403 | gfc_error ("Array component of structure at %C must have explicit " | |
1404 | "or deferred shape"); | |
1405 | return FAILURE; | |
1406 | } | |
1407 | } | |
1408 | ||
1409 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1410 | return FAILURE; | |
1411 | ||
1412 | c->ts = current_ts; | |
1413 | c->ts.cl = cl; | |
d4b7d0f0 | 1414 | c->attr = current_attr; |
6de9cd9a DN |
1415 | |
1416 | c->initializer = *init; | |
1417 | *init = NULL; | |
1418 | ||
1419 | c->as = *as; | |
1420 | if (c->as != NULL) | |
d4b7d0f0 | 1421 | c->attr.dimension = 1; |
6de9cd9a DN |
1422 | *as = NULL; |
1423 | ||
28d08315 PT |
1424 | /* Should this ever get more complicated, combine with similar section |
1425 | in add_init_expr_to_sym into a separate function. */ | |
d4b7d0f0 | 1426 | if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.cl |
d2848082 | 1427 | && c->ts.cl->length && c->ts.cl->length->expr_type == EXPR_CONSTANT) |
28d08315 | 1428 | { |
d2848082 DK |
1429 | int len; |
1430 | ||
1431 | gcc_assert (c->ts.cl && c->ts.cl->length); | |
1432 | gcc_assert (c->ts.cl->length->expr_type == EXPR_CONSTANT); | |
1433 | gcc_assert (c->ts.cl->length->ts.type == BT_INTEGER); | |
1434 | ||
1435 | len = mpz_get_si (c->ts.cl->length->value.integer); | |
28d08315 PT |
1436 | |
1437 | if (c->initializer->expr_type == EXPR_CONSTANT) | |
d2848082 | 1438 | gfc_set_constant_character_len (len, c->initializer, -1); |
28d08315 PT |
1439 | else if (mpz_cmp (c->ts.cl->length->value.integer, |
1440 | c->initializer->ts.cl->length->value.integer)) | |
1441 | { | |
d2848082 | 1442 | bool has_ts; |
28d08315 | 1443 | gfc_constructor *ctor = c->initializer->value.constructor; |
d2848082 | 1444 | |
d2848082 DK |
1445 | has_ts = (c->initializer->ts.cl |
1446 | && c->initializer->ts.cl->length_from_typespec); | |
1447 | ||
2f4d1994 | 1448 | if (ctor) |
d2848082 | 1449 | { |
2f4d1994 ILT |
1450 | int first_len; |
1451 | ||
1452 | /* Remember the length of the first element for checking | |
1453 | that all elements *in the constructor* have the same | |
1454 | length. This need not be the length of the LHS! */ | |
1455 | gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT); | |
1456 | gcc_assert (ctor->expr->ts.type == BT_CHARACTER); | |
1457 | first_len = ctor->expr->value.character.length; | |
1458 | ||
1459 | for (; ctor; ctor = ctor->next) | |
d2848082 | 1460 | { |
2f4d1994 ILT |
1461 | if (ctor->expr->expr_type == EXPR_CONSTANT) |
1462 | gfc_set_constant_character_len (len, ctor->expr, | |
1463 | has_ts ? -1 : first_len); | |
d2848082 | 1464 | } |
d2848082 | 1465 | } |
28d08315 PT |
1466 | } |
1467 | } | |
1468 | ||
6de9cd9a | 1469 | /* Check array components. */ |
d4b7d0f0 | 1470 | if (!c->attr.dimension) |
5046aff5 | 1471 | { |
d4b7d0f0 | 1472 | if (c->attr.allocatable) |
5046aff5 PT |
1473 | { |
1474 | gfc_error ("Allocatable component at %C must be an array"); | |
1475 | return FAILURE; | |
1476 | } | |
1477 | else | |
1478 | return SUCCESS; | |
1479 | } | |
6de9cd9a | 1480 | |
d4b7d0f0 | 1481 | if (c->attr.pointer) |
6de9cd9a DN |
1482 | { |
1483 | if (c->as->type != AS_DEFERRED) | |
1484 | { | |
5046aff5 PT |
1485 | gfc_error ("Pointer array component of structure at %C must have a " |
1486 | "deferred shape"); | |
1487 | return FAILURE; | |
1488 | } | |
1489 | } | |
d4b7d0f0 | 1490 | else if (c->attr.allocatable) |
5046aff5 PT |
1491 | { |
1492 | if (c->as->type != AS_DEFERRED) | |
1493 | { | |
1494 | gfc_error ("Allocatable component of structure at %C must have a " | |
1495 | "deferred shape"); | |
6de9cd9a DN |
1496 | return FAILURE; |
1497 | } | |
1498 | } | |
1499 | else | |
1500 | { | |
1501 | if (c->as->type != AS_EXPLICIT) | |
1502 | { | |
636dff67 SK |
1503 | gfc_error ("Array component of structure at %C must have an " |
1504 | "explicit shape"); | |
6de9cd9a DN |
1505 | return FAILURE; |
1506 | } | |
1507 | } | |
1508 | ||
1509 | return SUCCESS; | |
1510 | } | |
1511 | ||
1512 | ||
1513 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1514 | ||
1515 | match | |
636dff67 | 1516 | gfc_match_null (gfc_expr **result) |
6de9cd9a DN |
1517 | { |
1518 | gfc_symbol *sym; | |
1519 | gfc_expr *e; | |
1520 | match m; | |
1521 | ||
1522 | m = gfc_match (" null ( )"); | |
1523 | if (m != MATCH_YES) | |
1524 | return m; | |
1525 | ||
1526 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1527 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1528 | { | |
1529 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1530 | return MATCH_ERROR; | |
1531 | } | |
1532 | ||
1533 | gfc_intrinsic_symbol (sym); | |
1534 | ||
1535 | if (sym->attr.proc != PROC_INTRINSIC | |
231b2fcc TS |
1536 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1537 | sym->name, NULL) == FAILURE | |
1538 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
6de9cd9a DN |
1539 | return MATCH_ERROR; |
1540 | ||
1541 | e = gfc_get_expr (); | |
63645982 | 1542 | e->where = gfc_current_locus; |
6de9cd9a DN |
1543 | e->expr_type = EXPR_NULL; |
1544 | e->ts.type = BT_UNKNOWN; | |
1545 | ||
1546 | *result = e; | |
1547 | ||
1548 | return MATCH_YES; | |
1549 | } | |
1550 | ||
1551 | ||
6de9cd9a DN |
1552 | /* Match a variable name with an optional initializer. When this |
1553 | subroutine is called, a variable is expected to be parsed next. | |
1554 | Depending on what is happening at the moment, updates either the | |
1555 | symbol table or the current interface. */ | |
1556 | ||
1557 | static match | |
949d5b72 | 1558 | variable_decl (int elem) |
6de9cd9a DN |
1559 | { |
1560 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1561 | gfc_expr *initializer, *char_len; | |
1562 | gfc_array_spec *as; | |
83d890b9 | 1563 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
6de9cd9a DN |
1564 | gfc_charlen *cl; |
1565 | locus var_locus; | |
1566 | match m; | |
17b1d2a0 | 1567 | gfc_try t; |
83d890b9 | 1568 | gfc_symbol *sym; |
25d8f0a2 | 1569 | locus old_locus; |
6de9cd9a DN |
1570 | |
1571 | initializer = NULL; | |
1572 | as = NULL; | |
83d890b9 | 1573 | cp_as = NULL; |
25d8f0a2 | 1574 | old_locus = gfc_current_locus; |
6de9cd9a DN |
1575 | |
1576 | /* When we get here, we've just matched a list of attributes and | |
1577 | maybe a type and a double colon. The next thing we expect to see | |
1578 | is the name of the symbol. */ | |
1579 | m = gfc_match_name (name); | |
1580 | if (m != MATCH_YES) | |
1581 | goto cleanup; | |
1582 | ||
63645982 | 1583 | var_locus = gfc_current_locus; |
6de9cd9a DN |
1584 | |
1585 | /* Now we could see the optional array spec. or character length. */ | |
1586 | m = gfc_match_array_spec (&as); | |
83d890b9 AL |
1587 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1588 | cp_as = gfc_copy_array_spec (as); | |
1589 | else if (m == MATCH_ERROR) | |
6de9cd9a | 1590 | goto cleanup; |
25d8f0a2 | 1591 | |
6de9cd9a DN |
1592 | if (m == MATCH_NO) |
1593 | as = gfc_copy_array_spec (current_as); | |
1594 | ||
1595 | char_len = NULL; | |
1596 | cl = NULL; | |
1597 | ||
1598 | if (current_ts.type == BT_CHARACTER) | |
1599 | { | |
1600 | switch (match_char_length (&char_len)) | |
1601 | { | |
1602 | case MATCH_YES: | |
bfce226c | 1603 | cl = gfc_new_charlen (gfc_current_ns); |
6de9cd9a DN |
1604 | |
1605 | cl->length = char_len; | |
1606 | break; | |
1607 | ||
949d5b72 | 1608 | /* Non-constant lengths need to be copied after the first |
9b21a380 | 1609 | element. Also copy assumed lengths. */ |
6de9cd9a | 1610 | case MATCH_NO: |
9b21a380 JJ |
1611 | if (elem > 1 |
1612 | && (current_ts.cl->length == NULL | |
1613 | || current_ts.cl->length->expr_type != EXPR_CONSTANT)) | |
949d5b72 | 1614 | { |
bfce226c | 1615 | cl = gfc_new_charlen (gfc_current_ns); |
949d5b72 PT |
1616 | cl->length = gfc_copy_expr (current_ts.cl->length); |
1617 | } | |
1618 | else | |
1619 | cl = current_ts.cl; | |
1620 | ||
6de9cd9a DN |
1621 | break; |
1622 | ||
1623 | case MATCH_ERROR: | |
1624 | goto cleanup; | |
1625 | } | |
1626 | } | |
1627 | ||
83d890b9 | 1628 | /* If this symbol has already shown up in a Cray Pointer declaration, |
66e4ab31 | 1629 | then we want to set the type & bail out. */ |
83d890b9 AL |
1630 | if (gfc_option.flag_cray_pointer) |
1631 | { | |
1632 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1633 | if (sym != NULL && sym->attr.cray_pointee) | |
1634 | { | |
1635 | sym->ts.type = current_ts.type; | |
1636 | sym->ts.kind = current_ts.kind; | |
1637 | sym->ts.cl = cl; | |
1638 | sym->ts.derived = current_ts.derived; | |
a8b3b0b6 CR |
1639 | sym->ts.is_c_interop = current_ts.is_c_interop; |
1640 | sym->ts.is_iso_c = current_ts.is_iso_c; | |
83d890b9 AL |
1641 | m = MATCH_YES; |
1642 | ||
1643 | /* Check to see if we have an array specification. */ | |
1644 | if (cp_as != NULL) | |
1645 | { | |
1646 | if (sym->as != NULL) | |
1647 | { | |
e25a0da3 | 1648 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
83d890b9 AL |
1649 | gfc_free_array_spec (cp_as); |
1650 | m = MATCH_ERROR; | |
1651 | goto cleanup; | |
1652 | } | |
1653 | else | |
1654 | { | |
1655 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1656 | gfc_internal_error ("Couldn't set pointee array spec."); | |
d51347f9 | 1657 | |
83d890b9 | 1658 | /* Fix the array spec. */ |
d51347f9 | 1659 | m = gfc_mod_pointee_as (sym->as); |
83d890b9 AL |
1660 | if (m == MATCH_ERROR) |
1661 | goto cleanup; | |
1662 | } | |
d51347f9 | 1663 | } |
83d890b9 AL |
1664 | goto cleanup; |
1665 | } | |
1666 | else | |
1667 | { | |
1668 | gfc_free_array_spec (cp_as); | |
1669 | } | |
1670 | } | |
d51347f9 | 1671 | |
3070bab4 JW |
1672 | /* Procedure pointer as function result. */ |
1673 | if (gfc_current_state () == COMP_FUNCTION | |
1674 | && strcmp ("ppr@", gfc_current_block ()->name) == 0 | |
1675 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0) | |
1676 | strcpy (name, "ppr@"); | |
1677 | ||
1678 | if (gfc_current_state () == COMP_FUNCTION | |
1679 | && strcmp (name, gfc_current_block ()->name) == 0 | |
1680 | && gfc_current_block ()->result | |
1681 | && strcmp ("ppr@", gfc_current_block ()->result->name) == 0) | |
1682 | strcpy (name, "ppr@"); | |
d51347f9 | 1683 | |
6de9cd9a DN |
1684 | /* OK, we've successfully matched the declaration. Now put the |
1685 | symbol in the current namespace, because it might be used in the | |
69de3b83 | 1686 | optional initialization expression for this symbol, e.g. this is |
6de9cd9a DN |
1687 | perfectly legal: |
1688 | ||
1689 | integer, parameter :: i = huge(i) | |
1690 | ||
1691 | This is only true for parameters or variables of a basic type. | |
1692 | For components of derived types, it is not true, so we don't | |
1693 | create a symbol for those yet. If we fail to create the symbol, | |
1694 | bail out. */ | |
1695 | if (gfc_current_state () != COMP_DERIVED | |
1696 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1697 | { | |
72af9f0b PT |
1698 | m = MATCH_ERROR; |
1699 | goto cleanup; | |
1700 | } | |
1701 | ||
6133c68a TS |
1702 | /* An interface body specifies all of the procedure's |
1703 | characteristics and these shall be consistent with those | |
1704 | specified in the procedure definition, except that the interface | |
1705 | may specify a procedure that is not pure if the procedure is | |
1706 | defined to be pure(12.3.2). */ | |
72af9f0b | 1707 | if (current_ts.type == BT_DERIVED |
636dff67 SK |
1708 | && gfc_current_ns->proc_name |
1709 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
5a8af0b4 PT |
1710 | && current_ts.derived->ns != gfc_current_ns) |
1711 | { | |
1712 | gfc_symtree *st; | |
1713 | st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.derived->name); | |
1714 | if (!(current_ts.derived->attr.imported | |
1715 | && st != NULL | |
1716 | && st->n.sym == current_ts.derived) | |
1717 | && !gfc_current_ns->has_import_set) | |
1718 | { | |
1719 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1720 | "interface", name); | |
1721 | m = MATCH_ERROR; | |
1722 | goto cleanup; | |
1723 | } | |
6de9cd9a DN |
1724 | } |
1725 | ||
1726 | /* In functions that have a RESULT variable defined, the function | |
1727 | name always refers to function calls. Therefore, the name is | |
1728 | not allowed to appear in specification statements. */ | |
1729 | if (gfc_current_state () == COMP_FUNCTION | |
1730 | && gfc_current_block () != NULL | |
1731 | && gfc_current_block ()->result != NULL | |
1732 | && gfc_current_block ()->result != gfc_current_block () | |
1733 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1734 | { | |
1735 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1736 | m = MATCH_ERROR; | |
1737 | goto cleanup; | |
1738 | } | |
1739 | ||
294fbfc8 TS |
1740 | /* We allow old-style initializations of the form |
1741 | integer i /2/, j(4) /3*3, 1/ | |
1742 | (if no colon has been seen). These are different from data | |
1743 | statements in that initializers are only allowed to apply to the | |
1744 | variable immediately preceding, i.e. | |
1745 | integer i, j /1, 2/ | |
1746 | is not allowed. Therefore we have to do some work manually, that | |
75d17889 | 1747 | could otherwise be left to the matchers for DATA statements. */ |
294fbfc8 TS |
1748 | |
1749 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1750 | { | |
1751 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1752 | "initialization at %C") == FAILURE) | |
1753 | return MATCH_ERROR; | |
d51347f9 | 1754 | |
294fbfc8 TS |
1755 | return match_old_style_init (name); |
1756 | } | |
1757 | ||
6de9cd9a DN |
1758 | /* The double colon must be present in order to have initializers. |
1759 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1760 | if (colon_seen) | |
1761 | { | |
1762 | if (gfc_match (" =>") == MATCH_YES) | |
1763 | { | |
6de9cd9a DN |
1764 | if (!current_attr.pointer) |
1765 | { | |
1766 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1767 | m = MATCH_ERROR; | |
1768 | goto cleanup; | |
1769 | } | |
1770 | ||
1771 | m = gfc_match_null (&initializer); | |
1772 | if (m == MATCH_NO) | |
1773 | { | |
def66134 | 1774 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
6de9cd9a DN |
1775 | m = MATCH_ERROR; |
1776 | } | |
1777 | ||
1778 | if (gfc_pure (NULL)) | |
1779 | { | |
636dff67 SK |
1780 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1781 | "a PURE procedure"); | |
6de9cd9a DN |
1782 | m = MATCH_ERROR; |
1783 | } | |
1784 | ||
1785 | if (m != MATCH_YES) | |
1786 | goto cleanup; | |
1787 | ||
6de9cd9a DN |
1788 | } |
1789 | else if (gfc_match_char ('=') == MATCH_YES) | |
1790 | { | |
1791 | if (current_attr.pointer) | |
1792 | { | |
636dff67 SK |
1793 | gfc_error ("Pointer initialization at %C requires '=>', " |
1794 | "not '='"); | |
6de9cd9a DN |
1795 | m = MATCH_ERROR; |
1796 | goto cleanup; | |
1797 | } | |
1798 | ||
1799 | m = gfc_match_init_expr (&initializer); | |
1800 | if (m == MATCH_NO) | |
1801 | { | |
1802 | gfc_error ("Expected an initialization expression at %C"); | |
1803 | m = MATCH_ERROR; | |
1804 | } | |
1805 | ||
1806 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1807 | { | |
636dff67 SK |
1808 | gfc_error ("Initialization of variable at %C is not allowed in " |
1809 | "a PURE procedure"); | |
6de9cd9a DN |
1810 | m = MATCH_ERROR; |
1811 | } | |
1812 | ||
1813 | if (m != MATCH_YES) | |
1814 | goto cleanup; | |
1815 | } | |
cb44ab82 VL |
1816 | } |
1817 | ||
5046aff5 PT |
1818 | if (initializer != NULL && current_attr.allocatable |
1819 | && gfc_current_state () == COMP_DERIVED) | |
1820 | { | |
636dff67 SK |
1821 | gfc_error ("Initialization of allocatable component at %C is not " |
1822 | "allowed"); | |
5046aff5 PT |
1823 | m = MATCH_ERROR; |
1824 | goto cleanup; | |
1825 | } | |
1826 | ||
54b4ba60 | 1827 | /* Add the initializer. Note that it is fine if initializer is |
6de9cd9a DN |
1828 | NULL here, because we sometimes also need to check if a |
1829 | declaration *must* have an initialization expression. */ | |
1830 | if (gfc_current_state () != COMP_DERIVED) | |
1831 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1832 | else | |
54b4ba60 | 1833 | { |
5046aff5 | 1834 | if (current_ts.type == BT_DERIVED |
636dff67 | 1835 | && !current_attr.pointer && !initializer) |
54b4ba60 PB |
1836 | initializer = gfc_default_initializer (¤t_ts); |
1837 | t = build_struct (name, cl, &initializer, &as); | |
1838 | } | |
6de9cd9a DN |
1839 | |
1840 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1841 | ||
1842 | cleanup: | |
1843 | /* Free stuff up and return. */ | |
1844 | gfc_free_expr (initializer); | |
1845 | gfc_free_array_spec (as); | |
1846 | ||
1847 | return m; | |
1848 | } | |
1849 | ||
1850 | ||
b2b81a3f BM |
1851 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
1852 | This assumes that the byte size is equal to the kind number for | |
1853 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
6de9cd9a DN |
1854 | |
1855 | match | |
636dff67 | 1856 | gfc_match_old_kind_spec (gfc_typespec *ts) |
6de9cd9a DN |
1857 | { |
1858 | match m; | |
5cf54585 | 1859 | int original_kind; |
6de9cd9a DN |
1860 | |
1861 | if (gfc_match_char ('*') != MATCH_YES) | |
1862 | return MATCH_NO; | |
1863 | ||
5cf54585 | 1864 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
6de9cd9a DN |
1865 | if (m != MATCH_YES) |
1866 | return MATCH_ERROR; | |
1867 | ||
e45b3c75 ES |
1868 | original_kind = ts->kind; |
1869 | ||
6de9cd9a | 1870 | /* Massage the kind numbers for complex types. */ |
e45b3c75 ES |
1871 | if (ts->type == BT_COMPLEX) |
1872 | { | |
1873 | if (ts->kind % 2) | |
636dff67 SK |
1874 | { |
1875 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1876 | gfc_basic_typename (ts->type), original_kind); | |
1877 | return MATCH_ERROR; | |
1878 | } | |
e45b3c75 ES |
1879 | ts->kind /= 2; |
1880 | } | |
6de9cd9a | 1881 | |
e7a2d5fb | 1882 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a | 1883 | { |
e45b3c75 | 1884 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
636dff67 | 1885 | gfc_basic_typename (ts->type), original_kind); |
6de9cd9a DN |
1886 | return MATCH_ERROR; |
1887 | } | |
1888 | ||
df8652dc SK |
1889 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
1890 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1891 | return MATCH_ERROR; | |
1892 | ||
6de9cd9a DN |
1893 | return MATCH_YES; |
1894 | } | |
1895 | ||
1896 | ||
1897 | /* Match a kind specification. Since kinds are generally optional, we | |
1898 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1899 | string is found, then we know we have an error. */ | |
1900 | ||
1901 | match | |
e2d29968 | 1902 | gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only) |
6de9cd9a | 1903 | { |
e2d29968 | 1904 | locus where, loc; |
6de9cd9a DN |
1905 | gfc_expr *e; |
1906 | match m, n; | |
96ee3a4a | 1907 | char c; |
6de9cd9a DN |
1908 | const char *msg; |
1909 | ||
1910 | m = MATCH_NO; | |
e2d29968 | 1911 | n = MATCH_YES; |
6de9cd9a DN |
1912 | e = NULL; |
1913 | ||
e2d29968 PT |
1914 | where = loc = gfc_current_locus; |
1915 | ||
1916 | if (kind_expr_only) | |
1917 | goto kind_expr; | |
6de9cd9a DN |
1918 | |
1919 | if (gfc_match_char ('(') == MATCH_NO) | |
1920 | return MATCH_NO; | |
1921 | ||
1922 | /* Also gobbles optional text. */ | |
1923 | if (gfc_match (" kind = ") == MATCH_YES) | |
1924 | m = MATCH_ERROR; | |
1925 | ||
e2d29968 PT |
1926 | loc = gfc_current_locus; |
1927 | ||
1928 | kind_expr: | |
6de9cd9a | 1929 | n = gfc_match_init_expr (&e); |
e2d29968 | 1930 | |
6de9cd9a | 1931 | if (n != MATCH_YES) |
e2d29968 | 1932 | { |
1c8bcdf7 | 1933 | if (gfc_matching_function) |
e2d29968 | 1934 | { |
1c8bcdf7 PT |
1935 | /* The function kind expression might include use associated or |
1936 | imported parameters and try again after the specification | |
1937 | expressions..... */ | |
e2d29968 PT |
1938 | if (gfc_match_char (')') != MATCH_YES) |
1939 | { | |
1940 | gfc_error ("Missing right parenthesis at %C"); | |
1941 | m = MATCH_ERROR; | |
1942 | goto no_match; | |
1943 | } | |
1944 | ||
1945 | gfc_free_expr (e); | |
e2d29968 PT |
1946 | gfc_undo_symbols (); |
1947 | return MATCH_YES; | |
1948 | } | |
1949 | else | |
1950 | { | |
1951 | /* ....or else, the match is real. */ | |
1952 | if (n == MATCH_NO) | |
1953 | gfc_error ("Expected initialization expression at %C"); | |
1954 | if (n != MATCH_YES) | |
1955 | return MATCH_ERROR; | |
1956 | } | |
1957 | } | |
6de9cd9a DN |
1958 | |
1959 | if (e->rank != 0) | |
1960 | { | |
1961 | gfc_error ("Expected scalar initialization expression at %C"); | |
1962 | m = MATCH_ERROR; | |
1963 | goto no_match; | |
1964 | } | |
1965 | ||
1966 | msg = gfc_extract_int (e, &ts->kind); | |
1c8bcdf7 | 1967 | |
6de9cd9a DN |
1968 | if (msg != NULL) |
1969 | { | |
1970 | gfc_error (msg); | |
1971 | m = MATCH_ERROR; | |
1972 | goto no_match; | |
1973 | } | |
1974 | ||
a8b3b0b6 CR |
1975 | /* Before throwing away the expression, let's see if we had a |
1976 | C interoperable kind (and store the fact). */ | |
1977 | if (e->ts.is_c_interop == 1) | |
1978 | { | |
1979 | /* Mark this as c interoperable if being declared with one | |
1980 | of the named constants from iso_c_binding. */ | |
1981 | ts->is_c_interop = e->ts.is_iso_c; | |
1982 | ts->f90_type = e->ts.f90_type; | |
1983 | } | |
1984 | ||
6de9cd9a DN |
1985 | gfc_free_expr (e); |
1986 | e = NULL; | |
1987 | ||
a8b3b0b6 CR |
1988 | /* Ignore errors to this point, if we've gotten here. This means |
1989 | we ignore the m=MATCH_ERROR from above. */ | |
e7a2d5fb | 1990 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a DN |
1991 | { |
1992 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
1993 | gfc_basic_typename (ts->type)); | |
96ee3a4a TB |
1994 | gfc_current_locus = where; |
1995 | return MATCH_ERROR; | |
6de9cd9a | 1996 | } |
96ee3a4a | 1997 | |
2ec855f1 TB |
1998 | /* Warn if, e.g., c_int is used for a REAL variable, but not |
1999 | if, e.g., c_double is used for COMPLEX as the standard | |
2000 | explicitly says that the kind type parameter for complex and real | |
2001 | variable is the same, i.e. c_float == c_float_complex. */ | |
2002 | if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type | |
2003 | && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX) | |
2004 | || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL))) | |
2be51762 TB |
2005 | gfc_warning_now ("C kind type parameter is for type %s but type at %L " |
2006 | "is %s", gfc_basic_typename (ts->f90_type), &where, | |
2007 | gfc_basic_typename (ts->type)); | |
2ec855f1 | 2008 | |
96ee3a4a | 2009 | gfc_gobble_whitespace (); |
8fc541d3 FXC |
2010 | if ((c = gfc_next_ascii_char ()) != ')' |
2011 | && (ts->type != BT_CHARACTER || c != ',')) | |
6de9cd9a | 2012 | { |
96ee3a4a TB |
2013 | if (ts->type == BT_CHARACTER) |
2014 | gfc_error ("Missing right parenthesis or comma at %C"); | |
2015 | else | |
2016 | gfc_error ("Missing right parenthesis at %C"); | |
e2d29968 | 2017 | m = MATCH_ERROR; |
6de9cd9a | 2018 | } |
a8b3b0b6 CR |
2019 | else |
2020 | /* All tests passed. */ | |
2021 | m = MATCH_YES; | |
6de9cd9a | 2022 | |
a8b3b0b6 CR |
2023 | if(m == MATCH_ERROR) |
2024 | gfc_current_locus = where; | |
2025 | ||
2026 | /* Return what we know from the test(s). */ | |
2027 | return m; | |
6de9cd9a DN |
2028 | |
2029 | no_match: | |
2030 | gfc_free_expr (e); | |
63645982 | 2031 | gfc_current_locus = where; |
6de9cd9a DN |
2032 | return m; |
2033 | } | |
2034 | ||
2035 | ||
187de1ed FXC |
2036 | static match |
2037 | match_char_kind (int * kind, int * is_iso_c) | |
2038 | { | |
2039 | locus where; | |
2040 | gfc_expr *e; | |
2041 | match m, n; | |
2042 | const char *msg; | |
2043 | ||
2044 | m = MATCH_NO; | |
2045 | e = NULL; | |
2046 | where = gfc_current_locus; | |
2047 | ||
2048 | n = gfc_match_init_expr (&e); | |
96ee3a4a | 2049 | |
1c8bcdf7 | 2050 | if (n != MATCH_YES && gfc_matching_function) |
96ee3a4a | 2051 | { |
1c8bcdf7 PT |
2052 | /* The expression might include use-associated or imported |
2053 | parameters and try again after the specification | |
2054 | expressions. */ | |
96ee3a4a | 2055 | gfc_free_expr (e); |
96ee3a4a TB |
2056 | gfc_undo_symbols (); |
2057 | return MATCH_YES; | |
2058 | } | |
2059 | ||
187de1ed FXC |
2060 | if (n == MATCH_NO) |
2061 | gfc_error ("Expected initialization expression at %C"); | |
2062 | if (n != MATCH_YES) | |
2063 | return MATCH_ERROR; | |
2064 | ||
2065 | if (e->rank != 0) | |
2066 | { | |
2067 | gfc_error ("Expected scalar initialization expression at %C"); | |
2068 | m = MATCH_ERROR; | |
2069 | goto no_match; | |
2070 | } | |
2071 | ||
2072 | msg = gfc_extract_int (e, kind); | |
2073 | *is_iso_c = e->ts.is_iso_c; | |
2074 | if (msg != NULL) | |
2075 | { | |
2076 | gfc_error (msg); | |
2077 | m = MATCH_ERROR; | |
2078 | goto no_match; | |
2079 | } | |
2080 | ||
2081 | gfc_free_expr (e); | |
2082 | ||
2083 | /* Ignore errors to this point, if we've gotten here. This means | |
2084 | we ignore the m=MATCH_ERROR from above. */ | |
2085 | if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0) | |
2086 | { | |
2087 | gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind); | |
2088 | m = MATCH_ERROR; | |
2089 | } | |
2090 | else | |
2091 | /* All tests passed. */ | |
2092 | m = MATCH_YES; | |
2093 | ||
2094 | if (m == MATCH_ERROR) | |
2095 | gfc_current_locus = where; | |
2096 | ||
2097 | /* Return what we know from the test(s). */ | |
2098 | return m; | |
2099 | ||
2100 | no_match: | |
2101 | gfc_free_expr (e); | |
2102 | gfc_current_locus = where; | |
2103 | return m; | |
2104 | } | |
2105 | ||
6de9cd9a DN |
2106 | /* Match the various kind/length specifications in a CHARACTER |
2107 | declaration. We don't return MATCH_NO. */ | |
2108 | ||
2109 | static match | |
636dff67 | 2110 | match_char_spec (gfc_typespec *ts) |
6de9cd9a | 2111 | { |
187de1ed | 2112 | int kind, seen_length, is_iso_c; |
6de9cd9a DN |
2113 | gfc_charlen *cl; |
2114 | gfc_expr *len; | |
2115 | match m; | |
187de1ed | 2116 | |
6de9cd9a DN |
2117 | len = NULL; |
2118 | seen_length = 0; | |
187de1ed FXC |
2119 | kind = 0; |
2120 | is_iso_c = 0; | |
6de9cd9a DN |
2121 | |
2122 | /* Try the old-style specification first. */ | |
2123 | old_char_selector = 0; | |
2124 | ||
2125 | m = match_char_length (&len); | |
2126 | if (m != MATCH_NO) | |
2127 | { | |
2128 | if (m == MATCH_YES) | |
2129 | old_char_selector = 1; | |
2130 | seen_length = 1; | |
2131 | goto done; | |
2132 | } | |
2133 | ||
2134 | m = gfc_match_char ('('); | |
2135 | if (m != MATCH_YES) | |
2136 | { | |
a8b3b0b6 | 2137 | m = MATCH_YES; /* Character without length is a single char. */ |
6de9cd9a DN |
2138 | goto done; |
2139 | } | |
2140 | ||
a8b3b0b6 | 2141 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ |
6de9cd9a DN |
2142 | if (gfc_match (" kind =") == MATCH_YES) |
2143 | { | |
187de1ed | 2144 | m = match_char_kind (&kind, &is_iso_c); |
a8b3b0b6 | 2145 | |
6de9cd9a DN |
2146 | if (m == MATCH_ERROR) |
2147 | goto done; | |
2148 | if (m == MATCH_NO) | |
2149 | goto syntax; | |
2150 | ||
2151 | if (gfc_match (" , len =") == MATCH_NO) | |
2152 | goto rparen; | |
2153 | ||
2154 | m = char_len_param_value (&len); | |
2155 | if (m == MATCH_NO) | |
2156 | goto syntax; | |
2157 | if (m == MATCH_ERROR) | |
2158 | goto done; | |
2159 | seen_length = 1; | |
2160 | ||
2161 | goto rparen; | |
2162 | } | |
2163 | ||
66e4ab31 | 2164 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ |
6de9cd9a DN |
2165 | if (gfc_match (" len =") == MATCH_YES) |
2166 | { | |
2167 | m = char_len_param_value (&len); | |
2168 | if (m == MATCH_NO) | |
2169 | goto syntax; | |
2170 | if (m == MATCH_ERROR) | |
2171 | goto done; | |
2172 | seen_length = 1; | |
2173 | ||
2174 | if (gfc_match_char (')') == MATCH_YES) | |
2175 | goto done; | |
2176 | ||
2177 | if (gfc_match (" , kind =") != MATCH_YES) | |
2178 | goto syntax; | |
2179 | ||
187de1ed FXC |
2180 | if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR) |
2181 | goto done; | |
6de9cd9a DN |
2182 | |
2183 | goto rparen; | |
2184 | } | |
2185 | ||
66e4ab31 | 2186 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
6de9cd9a DN |
2187 | m = char_len_param_value (&len); |
2188 | if (m == MATCH_NO) | |
2189 | goto syntax; | |
2190 | if (m == MATCH_ERROR) | |
2191 | goto done; | |
2192 | seen_length = 1; | |
2193 | ||
2194 | m = gfc_match_char (')'); | |
2195 | if (m == MATCH_YES) | |
2196 | goto done; | |
2197 | ||
2198 | if (gfc_match_char (',') != MATCH_YES) | |
2199 | goto syntax; | |
2200 | ||
a8b3b0b6 | 2201 | gfc_match (" kind ="); /* Gobble optional text. */ |
6de9cd9a | 2202 | |
187de1ed | 2203 | m = match_char_kind (&kind, &is_iso_c); |
6de9cd9a DN |
2204 | if (m == MATCH_ERROR) |
2205 | goto done; | |
2206 | if (m == MATCH_NO) | |
2207 | goto syntax; | |
2208 | ||
2209 | rparen: | |
2210 | /* Require a right-paren at this point. */ | |
2211 | m = gfc_match_char (')'); | |
2212 | if (m == MATCH_YES) | |
2213 | goto done; | |
2214 | ||
2215 | syntax: | |
2216 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
2217 | m = MATCH_ERROR; | |
16f8ffc8 JD |
2218 | gfc_free_expr (len); |
2219 | return m; | |
6de9cd9a DN |
2220 | |
2221 | done: | |
a99d95a2 PT |
2222 | /* Deal with character functions after USE and IMPORT statements. */ |
2223 | if (gfc_matching_function) | |
1c8bcdf7 | 2224 | { |
a99d95a2 | 2225 | gfc_free_expr (len); |
1c8bcdf7 PT |
2226 | gfc_undo_symbols (); |
2227 | return MATCH_YES; | |
2228 | } | |
2229 | ||
6de9cd9a DN |
2230 | if (m != MATCH_YES) |
2231 | { | |
2232 | gfc_free_expr (len); | |
2233 | return m; | |
2234 | } | |
2235 | ||
2236 | /* Do some final massaging of the length values. */ | |
bfce226c | 2237 | cl = gfc_new_charlen (gfc_current_ns); |
6de9cd9a DN |
2238 | |
2239 | if (seen_length == 0) | |
2240 | cl->length = gfc_int_expr (1); | |
2241 | else | |
5cd09fac | 2242 | cl->length = len; |
6de9cd9a DN |
2243 | |
2244 | ts->cl = cl; | |
187de1ed | 2245 | ts->kind = kind == 0 ? gfc_default_character_kind : kind; |
6de9cd9a | 2246 | |
a8b3b0b6 CR |
2247 | /* We have to know if it was a c interoperable kind so we can |
2248 | do accurate type checking of bind(c) procs, etc. */ | |
187de1ed FXC |
2249 | if (kind != 0) |
2250 | /* Mark this as c interoperable if being declared with one | |
2251 | of the named constants from iso_c_binding. */ | |
2252 | ts->is_c_interop = is_iso_c; | |
a8b3b0b6 | 2253 | else if (len != NULL) |
187de1ed FXC |
2254 | /* Here, we might have parsed something such as: character(c_char) |
2255 | In this case, the parsing code above grabs the c_char when | |
2256 | looking for the length (line 1690, roughly). it's the last | |
2257 | testcase for parsing the kind params of a character variable. | |
2258 | However, it's not actually the length. this seems like it | |
2259 | could be an error. | |
2260 | To see if the user used a C interop kind, test the expr | |
2261 | of the so called length, and see if it's C interoperable. */ | |
2262 | ts->is_c_interop = len->ts.is_iso_c; | |
a8b3b0b6 | 2263 | |
6de9cd9a DN |
2264 | return MATCH_YES; |
2265 | } | |
2266 | ||
2267 | ||
2268 | /* Matches a type specification. If successful, sets the ts structure | |
2269 | to the matched specification. This is necessary for FUNCTION and | |
2270 | IMPLICIT statements. | |
2271 | ||
d51347f9 | 2272 | If implicit_flag is nonzero, then we don't check for the optional |
e5ddaa24 | 2273 | kind specification. Not doing so is needed for matching an IMPLICIT |
6de9cd9a DN |
2274 | statement correctly. */ |
2275 | ||
e2d29968 PT |
2276 | match |
2277 | gfc_match_type_spec (gfc_typespec *ts, int implicit_flag) | |
6de9cd9a DN |
2278 | { |
2279 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2280 | gfc_symbol *sym; | |
2281 | match m; | |
8fc541d3 | 2282 | char c; |
1c8bcdf7 | 2283 | bool seen_deferred_kind; |
6de9cd9a | 2284 | |
1c8bcdf7 PT |
2285 | /* A belt and braces check that the typespec is correctly being treated |
2286 | as a deferred characteristic association. */ | |
2287 | seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION) | |
a99d95a2 PT |
2288 | && (gfc_current_block ()->result->ts.kind == -1) |
2289 | && (ts->kind == -1); | |
6de9cd9a | 2290 | gfc_clear_ts (ts); |
1c8bcdf7 PT |
2291 | if (seen_deferred_kind) |
2292 | ts->kind = -1; | |
6de9cd9a | 2293 | |
a8b3b0b6 CR |
2294 | /* Clear the current binding label, in case one is given. */ |
2295 | curr_binding_label[0] = '\0'; | |
2296 | ||
5f700e6d AL |
2297 | if (gfc_match (" byte") == MATCH_YES) |
2298 | { | |
d51347f9 | 2299 | if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C") |
5f700e6d AL |
2300 | == FAILURE) |
2301 | return MATCH_ERROR; | |
2302 | ||
2303 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
2304 | { | |
2305 | gfc_error ("BYTE type used at %C " | |
2306 | "is not available on the target machine"); | |
2307 | return MATCH_ERROR; | |
2308 | } | |
d51347f9 | 2309 | |
5f700e6d AL |
2310 | ts->type = BT_INTEGER; |
2311 | ts->kind = 1; | |
2312 | return MATCH_YES; | |
2313 | } | |
2314 | ||
6de9cd9a DN |
2315 | if (gfc_match (" integer") == MATCH_YES) |
2316 | { | |
2317 | ts->type = BT_INTEGER; | |
9d64df18 | 2318 | ts->kind = gfc_default_integer_kind; |
6de9cd9a DN |
2319 | goto get_kind; |
2320 | } | |
2321 | ||
2322 | if (gfc_match (" character") == MATCH_YES) | |
2323 | { | |
2324 | ts->type = BT_CHARACTER; | |
e5ddaa24 TS |
2325 | if (implicit_flag == 0) |
2326 | return match_char_spec (ts); | |
2327 | else | |
2328 | return MATCH_YES; | |
6de9cd9a DN |
2329 | } |
2330 | ||
2331 | if (gfc_match (" real") == MATCH_YES) | |
2332 | { | |
2333 | ts->type = BT_REAL; | |
9d64df18 | 2334 | ts->kind = gfc_default_real_kind; |
6de9cd9a DN |
2335 | goto get_kind; |
2336 | } | |
2337 | ||
2338 | if (gfc_match (" double precision") == MATCH_YES) | |
2339 | { | |
2340 | ts->type = BT_REAL; | |
9d64df18 | 2341 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
2342 | return MATCH_YES; |
2343 | } | |
2344 | ||
2345 | if (gfc_match (" complex") == MATCH_YES) | |
2346 | { | |
2347 | ts->type = BT_COMPLEX; | |
9d64df18 | 2348 | ts->kind = gfc_default_complex_kind; |
6de9cd9a DN |
2349 | goto get_kind; |
2350 | } | |
2351 | ||
2352 | if (gfc_match (" double complex") == MATCH_YES) | |
2353 | { | |
df8652dc SK |
2354 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
2355 | "conform to the Fortran 95 standard") == FAILURE) | |
2356 | return MATCH_ERROR; | |
2357 | ||
6de9cd9a | 2358 | ts->type = BT_COMPLEX; |
9d64df18 | 2359 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
2360 | return MATCH_YES; |
2361 | } | |
2362 | ||
2363 | if (gfc_match (" logical") == MATCH_YES) | |
2364 | { | |
2365 | ts->type = BT_LOGICAL; | |
9d64df18 | 2366 | ts->kind = gfc_default_logical_kind; |
6de9cd9a DN |
2367 | goto get_kind; |
2368 | } | |
2369 | ||
2370 | m = gfc_match (" type ( %n )", name); | |
2371 | if (m != MATCH_YES) | |
727e8544 JW |
2372 | { |
2373 | m = gfc_match (" class ( %n )", name); | |
2374 | if (m != MATCH_YES) | |
2375 | return m; | |
2376 | ts->is_class = 1; | |
2377 | ||
2378 | /* TODO: Implement Polymorphism. */ | |
2379 | gfc_warning ("Polymorphic entities are not yet implemented. " | |
2380 | "CLASS will be treated like TYPE at %C"); | |
2381 | } | |
6de9cd9a | 2382 | |
1c8bcdf7 PT |
2383 | ts->type = BT_DERIVED; |
2384 | ||
2385 | /* Defer association of the derived type until the end of the | |
2386 | specification block. However, if the derived type can be | |
2387 | found, add it to the typespec. */ | |
2388 | if (gfc_matching_function) | |
e2d29968 | 2389 | { |
1c8bcdf7 PT |
2390 | ts->derived = NULL; |
2391 | if (gfc_current_state () != COMP_INTERFACE | |
2392 | && !gfc_find_symbol (name, NULL, 1, &sym) && sym) | |
2393 | ts->derived = sym; | |
e2d29968 PT |
2394 | return MATCH_YES; |
2395 | } | |
2396 | ||
2397 | /* Search for the name but allow the components to be defined later. If | |
2398 | type = -1, this typespec has been seen in a function declaration but | |
1c8bcdf7 PT |
2399 | the type could not be accessed at that point. */ |
2400 | sym = NULL; | |
e2d29968 | 2401 | if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym)) |
6de9cd9a DN |
2402 | { |
2403 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2404 | return MATCH_ERROR; | |
2405 | } | |
e2d29968 PT |
2406 | else if (ts->kind == -1) |
2407 | { | |
1c8bcdf7 PT |
2408 | int iface = gfc_state_stack->previous->state != COMP_INTERFACE |
2409 | || gfc_current_ns->has_import_set; | |
2410 | if (gfc_find_symbol (name, NULL, iface, &sym)) | |
e2d29968 PT |
2411 | { |
2412 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2413 | return MATCH_ERROR; | |
2414 | } | |
2415 | ||
1c8bcdf7 | 2416 | ts->kind = 0; |
e2d29968 PT |
2417 | if (sym == NULL) |
2418 | return MATCH_NO; | |
2419 | } | |
6de9cd9a DN |
2420 | |
2421 | if (sym->attr.flavor != FL_DERIVED | |
231b2fcc | 2422 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
2423 | return MATCH_ERROR; |
2424 | ||
1c8bcdf7 | 2425 | gfc_set_sym_referenced (sym); |
6de9cd9a DN |
2426 | ts->derived = sym; |
2427 | ||
2428 | return MATCH_YES; | |
2429 | ||
2430 | get_kind: | |
2431 | /* For all types except double, derived and character, look for an | |
2432 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
e5ddaa24 | 2433 | if (implicit_flag == 1) |
6de9cd9a DN |
2434 | return MATCH_YES; |
2435 | ||
0ff0dfbf TS |
2436 | if (gfc_current_form == FORM_FREE) |
2437 | { | |
8fc541d3 | 2438 | c = gfc_peek_ascii_char(); |
0ff0dfbf | 2439 | if (!gfc_is_whitespace(c) && c != '*' && c != '(' |
636dff67 | 2440 | && c != ':' && c != ',') |
0ff0dfbf TS |
2441 | return MATCH_NO; |
2442 | } | |
2443 | ||
e2d29968 | 2444 | m = gfc_match_kind_spec (ts, false); |
6de9cd9a DN |
2445 | if (m == MATCH_NO && ts->type != BT_CHARACTER) |
2446 | m = gfc_match_old_kind_spec (ts); | |
2447 | ||
1c8bcdf7 PT |
2448 | /* Defer association of the KIND expression of function results |
2449 | until after USE and IMPORT statements. */ | |
2450 | if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ()) | |
2451 | || gfc_matching_function) | |
2452 | return MATCH_YES; | |
2453 | ||
6de9cd9a DN |
2454 | if (m == MATCH_NO) |
2455 | m = MATCH_YES; /* No kind specifier found. */ | |
2456 | ||
2457 | return m; | |
2458 | } | |
2459 | ||
2460 | ||
e5ddaa24 TS |
2461 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
2462 | already matched in parse.c, or we would not end up here in the | |
2463 | first place. So the only thing we need to check, is if there is | |
2464 | trailing garbage. If not, the match is successful. */ | |
2465 | ||
2466 | match | |
2467 | gfc_match_implicit_none (void) | |
2468 | { | |
e5ddaa24 TS |
2469 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
2470 | } | |
2471 | ||
2472 | ||
2473 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
2474 | ||
2475 | static match | |
1107b970 | 2476 | match_implicit_range (void) |
e5ddaa24 | 2477 | { |
8fc541d3 FXC |
2478 | char c, c1, c2; |
2479 | int inner; | |
e5ddaa24 TS |
2480 | locus cur_loc; |
2481 | ||
2482 | cur_loc = gfc_current_locus; | |
2483 | ||
2484 | gfc_gobble_whitespace (); | |
8fc541d3 | 2485 | c = gfc_next_ascii_char (); |
e5ddaa24 TS |
2486 | if (c != '(') |
2487 | { | |
2488 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
2489 | goto bad; | |
2490 | } | |
2491 | ||
2492 | inner = 1; | |
2493 | while (inner) | |
2494 | { | |
2495 | gfc_gobble_whitespace (); | |
8fc541d3 | 2496 | c1 = gfc_next_ascii_char (); |
e5ddaa24 TS |
2497 | if (!ISALPHA (c1)) |
2498 | goto bad; | |
2499 | ||
2500 | gfc_gobble_whitespace (); | |
8fc541d3 | 2501 | c = gfc_next_ascii_char (); |
e5ddaa24 TS |
2502 | |
2503 | switch (c) | |
2504 | { | |
2505 | case ')': | |
66e4ab31 | 2506 | inner = 0; /* Fall through. */ |
e5ddaa24 TS |
2507 | |
2508 | case ',': | |
2509 | c2 = c1; | |
2510 | break; | |
2511 | ||
2512 | case '-': | |
2513 | gfc_gobble_whitespace (); | |
8fc541d3 | 2514 | c2 = gfc_next_ascii_char (); |
e5ddaa24 TS |
2515 | if (!ISALPHA (c2)) |
2516 | goto bad; | |
2517 | ||
2518 | gfc_gobble_whitespace (); | |
8fc541d3 | 2519 | c = gfc_next_ascii_char (); |
e5ddaa24 TS |
2520 | |
2521 | if ((c != ',') && (c != ')')) | |
2522 | goto bad; | |
2523 | if (c == ')') | |
2524 | inner = 0; | |
2525 | ||
2526 | break; | |
2527 | ||
2528 | default: | |
2529 | goto bad; | |
2530 | } | |
2531 | ||
2532 | if (c1 > c2) | |
2533 | { | |
2534 | gfc_error ("Letters must be in alphabetic order in " | |
2535 | "IMPLICIT statement at %C"); | |
2536 | goto bad; | |
2537 | } | |
2538 | ||
2539 | /* See if we can add the newly matched range to the pending | |
636dff67 SK |
2540 | implicits from this IMPLICIT statement. We do not check for |
2541 | conflicts with whatever earlier IMPLICIT statements may have | |
2542 | set. This is done when we've successfully finished matching | |
2543 | the current one. */ | |
1107b970 | 2544 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
e5ddaa24 TS |
2545 | goto bad; |
2546 | } | |
2547 | ||
2548 | return MATCH_YES; | |
2549 | ||
2550 | bad: | |
2551 | gfc_syntax_error (ST_IMPLICIT); | |
2552 | ||
2553 | gfc_current_locus = cur_loc; | |
2554 | return MATCH_ERROR; | |
2555 | } | |
2556 | ||
2557 | ||
2558 | /* Match an IMPLICIT statement, storing the types for | |
2559 | gfc_set_implicit() if the statement is accepted by the parser. | |
2560 | There is a strange looking, but legal syntactic construction | |
2561 | possible. It looks like: | |
2562 | ||
2563 | IMPLICIT INTEGER (a-b) (c-d) | |
2564 | ||
2565 | This is legal if "a-b" is a constant expression that happens to | |
2566 | equal one of the legal kinds for integers. The real problem | |
2567 | happens with an implicit specification that looks like: | |
2568 | ||
2569 | IMPLICIT INTEGER (a-b) | |
2570 | ||
2571 | In this case, a typespec matcher that is "greedy" (as most of the | |
2572 | matchers are) gobbles the character range as a kindspec, leaving | |
2573 | nothing left. We therefore have to go a bit more slowly in the | |
2574 | matching process by inhibiting the kindspec checking during | |
2575 | typespec matching and checking for a kind later. */ | |
2576 | ||
2577 | match | |
2578 | gfc_match_implicit (void) | |
2579 | { | |
2580 | gfc_typespec ts; | |
2581 | locus cur_loc; | |
8fc541d3 | 2582 | char c; |
e5ddaa24 TS |
2583 | match m; |
2584 | ||
44000dbb JD |
2585 | gfc_clear_ts (&ts); |
2586 | ||
e5ddaa24 TS |
2587 | /* We don't allow empty implicit statements. */ |
2588 | if (gfc_match_eos () == MATCH_YES) | |
2589 | { | |
2590 | gfc_error ("Empty IMPLICIT statement at %C"); | |
2591 | return MATCH_ERROR; | |
2592 | } | |
2593 | ||
e5ddaa24 TS |
2594 | do |
2595 | { | |
1107b970 PB |
2596 | /* First cleanup. */ |
2597 | gfc_clear_new_implicit (); | |
2598 | ||
e5ddaa24 | 2599 | /* A basic type is mandatory here. */ |
e2d29968 | 2600 | m = gfc_match_type_spec (&ts, 1); |
e5ddaa24 TS |
2601 | if (m == MATCH_ERROR) |
2602 | goto error; | |
2603 | if (m == MATCH_NO) | |
2604 | goto syntax; | |
2605 | ||
2606 | cur_loc = gfc_current_locus; | |
1107b970 | 2607 | m = match_implicit_range (); |
e5ddaa24 TS |
2608 | |
2609 | if (m == MATCH_YES) | |
2610 | { | |
1107b970 | 2611 | /* We may have <TYPE> (<RANGE>). */ |
e5ddaa24 | 2612 | gfc_gobble_whitespace (); |
8fc541d3 | 2613 | c = gfc_next_ascii_char (); |
e5ddaa24 | 2614 | if ((c == '\n') || (c == ',')) |
1107b970 PB |
2615 | { |
2616 | /* Check for CHARACTER with no length parameter. */ | |
2617 | if (ts.type == BT_CHARACTER && !ts.cl) | |
2618 | { | |
9d64df18 | 2619 | ts.kind = gfc_default_character_kind; |
bfce226c | 2620 | ts.cl = gfc_new_charlen (gfc_current_ns); |
1107b970 PB |
2621 | ts.cl->length = gfc_int_expr (1); |
2622 | } | |
2623 | ||
2624 | /* Record the Successful match. */ | |
2625 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2626 | return MATCH_ERROR; | |
2627 | continue; | |
2628 | } | |
e5ddaa24 TS |
2629 | |
2630 | gfc_current_locus = cur_loc; | |
2631 | } | |
2632 | ||
1107b970 PB |
2633 | /* Discard the (incorrectly) matched range. */ |
2634 | gfc_clear_new_implicit (); | |
2635 | ||
2636 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
2637 | if (ts.type == BT_CHARACTER) | |
2638 | m = match_char_spec (&ts); | |
2639 | else | |
e5ddaa24 | 2640 | { |
e2d29968 | 2641 | m = gfc_match_kind_spec (&ts, false); |
e5ddaa24 | 2642 | if (m == MATCH_NO) |
1107b970 PB |
2643 | { |
2644 | m = gfc_match_old_kind_spec (&ts); | |
2645 | if (m == MATCH_ERROR) | |
2646 | goto error; | |
2647 | if (m == MATCH_NO) | |
2648 | goto syntax; | |
2649 | } | |
e5ddaa24 | 2650 | } |
1107b970 PB |
2651 | if (m == MATCH_ERROR) |
2652 | goto error; | |
e5ddaa24 | 2653 | |
1107b970 | 2654 | m = match_implicit_range (); |
e5ddaa24 TS |
2655 | if (m == MATCH_ERROR) |
2656 | goto error; | |
2657 | if (m == MATCH_NO) | |
2658 | goto syntax; | |
2659 | ||
2660 | gfc_gobble_whitespace (); | |
8fc541d3 | 2661 | c = gfc_next_ascii_char (); |
e5ddaa24 TS |
2662 | if ((c != '\n') && (c != ',')) |
2663 | goto syntax; | |
2664 | ||
1107b970 PB |
2665 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2666 | return MATCH_ERROR; | |
e5ddaa24 TS |
2667 | } |
2668 | while (c == ','); | |
2669 | ||
1107b970 | 2670 | return MATCH_YES; |
e5ddaa24 TS |
2671 | |
2672 | syntax: | |
2673 | gfc_syntax_error (ST_IMPLICIT); | |
2674 | ||
2675 | error: | |
2676 | return MATCH_ERROR; | |
2677 | } | |
2678 | ||
66e4ab31 | 2679 | |
8998be20 TB |
2680 | match |
2681 | gfc_match_import (void) | |
2682 | { | |
2683 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2684 | match m; | |
2685 | gfc_symbol *sym; | |
2686 | gfc_symtree *st; | |
2687 | ||
66e4ab31 SK |
2688 | if (gfc_current_ns->proc_name == NULL |
2689 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
8998be20 TB |
2690 | { |
2691 | gfc_error ("IMPORT statement at %C only permitted in " | |
2692 | "an INTERFACE body"); | |
2693 | return MATCH_ERROR; | |
2694 | } | |
2695 | ||
636dff67 | 2696 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
8998be20 TB |
2697 | == FAILURE) |
2698 | return MATCH_ERROR; | |
2699 | ||
2700 | if (gfc_match_eos () == MATCH_YES) | |
2701 | { | |
2702 | /* All host variables should be imported. */ | |
2703 | gfc_current_ns->has_import_set = 1; | |
2704 | return MATCH_YES; | |
2705 | } | |
2706 | ||
2707 | if (gfc_match (" ::") == MATCH_YES) | |
2708 | { | |
2709 | if (gfc_match_eos () == MATCH_YES) | |
636dff67 SK |
2710 | { |
2711 | gfc_error ("Expecting list of named entities at %C"); | |
2712 | return MATCH_ERROR; | |
2713 | } | |
8998be20 TB |
2714 | } |
2715 | ||
2716 | for(;;) | |
2717 | { | |
2718 | m = gfc_match (" %n", name); | |
2719 | switch (m) | |
2720 | { | |
2721 | case MATCH_YES: | |
36d3fb4c | 2722 | if (gfc_current_ns->parent != NULL |
66e4ab31 | 2723 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
36d3fb4c PT |
2724 | { |
2725 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2726 | return MATCH_ERROR; | |
2727 | } | |
2728 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
66e4ab31 SK |
2729 | && gfc_find_symbol (name, |
2730 | gfc_current_ns->proc_name->ns->parent, | |
2731 | 1, &sym)) | |
636dff67 SK |
2732 | { |
2733 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2734 | return MATCH_ERROR; | |
2735 | } | |
2736 | ||
2737 | if (sym == NULL) | |
2738 | { | |
2739 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2740 | "at %C - does not exist.", name); | |
2741 | return MATCH_ERROR; | |
2742 | } | |
2743 | ||
d51347f9 | 2744 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) |
636dff67 SK |
2745 | { |
2746 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2747 | "at %C.", name); | |
2748 | goto next_item; | |
2749 | } | |
2750 | ||
bc2a4733 | 2751 | st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name); |
636dff67 SK |
2752 | st->n.sym = sym; |
2753 | sym->refs++; | |
5a8af0b4 | 2754 | sym->attr.imported = 1; |
8998be20 TB |
2755 | |
2756 | goto next_item; | |
2757 | ||
2758 | case MATCH_NO: | |
2759 | break; | |
2760 | ||
2761 | case MATCH_ERROR: | |
2762 | return MATCH_ERROR; | |
2763 | } | |
2764 | ||
2765 | next_item: | |
2766 | if (gfc_match_eos () == MATCH_YES) | |
2767 | break; | |
2768 | if (gfc_match_char (',') != MATCH_YES) | |
2769 | goto syntax; | |
2770 | } | |
2771 | ||
2772 | return MATCH_YES; | |
2773 | ||
2774 | syntax: | |
2775 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2776 | return MATCH_ERROR; | |
2777 | } | |
e5ddaa24 | 2778 | |
66e4ab31 | 2779 | |
f2449db4 RS |
2780 | /* A minimal implementation of gfc_match without whitespace, escape |
2781 | characters or variable arguments. Returns true if the next | |
2782 | characters match the TARGET template exactly. */ | |
2783 | ||
2784 | static bool | |
2785 | match_string_p (const char *target) | |
2786 | { | |
2787 | const char *p; | |
2788 | ||
2789 | for (p = target; *p; p++) | |
8fc541d3 | 2790 | if ((char) gfc_next_ascii_char () != *p) |
f2449db4 RS |
2791 | return false; |
2792 | return true; | |
2793 | } | |
2794 | ||
6de9cd9a DN |
2795 | /* Matches an attribute specification including array specs. If |
2796 | successful, leaves the variables current_attr and current_as | |
2797 | holding the specification. Also sets the colon_seen variable for | |
2798 | later use by matchers associated with initializations. | |
2799 | ||
2800 | This subroutine is a little tricky in the sense that we don't know | |
2801 | if we really have an attr-spec until we hit the double colon. | |
2802 | Until that time, we can only return MATCH_NO. This forces us to | |
2803 | check for duplicate specification at this level. */ | |
2804 | ||
2805 | static match | |
2806 | match_attr_spec (void) | |
2807 | { | |
6de9cd9a DN |
2808 | /* Modifiers that can exist in a type statement. */ |
2809 | typedef enum | |
2810 | { GFC_DECL_BEGIN = 0, | |
2811 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
2812 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
ee7e677f TB |
2813 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
2814 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
f2449db4 | 2815 | DECL_IS_BIND_C, DECL_NONE, |
6de9cd9a DN |
2816 | GFC_DECL_END /* Sentinel */ |
2817 | } | |
2818 | decl_types; | |
2819 | ||
2820 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
2821 | #define NUM_DECL GFC_DECL_END | |
2822 | ||
6de9cd9a DN |
2823 | locus start, seen_at[NUM_DECL]; |
2824 | int seen[NUM_DECL]; | |
09639a83 | 2825 | unsigned int d; |
6de9cd9a DN |
2826 | const char *attr; |
2827 | match m; | |
17b1d2a0 | 2828 | gfc_try t; |
6de9cd9a DN |
2829 | |
2830 | gfc_clear_attr (¤t_attr); | |
63645982 | 2831 | start = gfc_current_locus; |
6de9cd9a DN |
2832 | |
2833 | current_as = NULL; | |
2834 | colon_seen = 0; | |
2835 | ||
2836 | /* See if we get all of the keywords up to the final double colon. */ | |
2837 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2838 | seen[d] = 0; | |
2839 | ||
2840 | for (;;) | |
2841 | { | |
8fc541d3 | 2842 | char ch; |
a8b3b0b6 | 2843 | |
f2449db4 RS |
2844 | d = DECL_NONE; |
2845 | gfc_gobble_whitespace (); | |
2846 | ||
8fc541d3 | 2847 | ch = gfc_next_ascii_char (); |
f2449db4 RS |
2848 | if (ch == ':') |
2849 | { | |
2850 | /* This is the successful exit condition for the loop. */ | |
8fc541d3 | 2851 | if (gfc_next_ascii_char () == ':') |
f2449db4 RS |
2852 | break; |
2853 | } | |
2854 | else if (ch == ',') | |
a8b3b0b6 | 2855 | { |
a8b3b0b6 | 2856 | gfc_gobble_whitespace (); |
8fc541d3 | 2857 | switch (gfc_peek_ascii_char ()) |
a8b3b0b6 | 2858 | { |
f2449db4 RS |
2859 | case 'a': |
2860 | if (match_string_p ("allocatable")) | |
2861 | d = DECL_ALLOCATABLE; | |
2862 | break; | |
2863 | ||
2864 | case 'b': | |
a8b3b0b6 | 2865 | /* Try and match the bind(c). */ |
1eabf70a | 2866 | m = gfc_match_bind_c (NULL, true); |
129d15a3 | 2867 | if (m == MATCH_YES) |
a8b3b0b6 | 2868 | d = DECL_IS_BIND_C; |
129d15a3 JW |
2869 | else if (m == MATCH_ERROR) |
2870 | goto cleanup; | |
f2449db4 RS |
2871 | break; |
2872 | ||
2873 | case 'd': | |
2874 | if (match_string_p ("dimension")) | |
2875 | d = DECL_DIMENSION; | |
2876 | break; | |
2877 | ||
2878 | case 'e': | |
2879 | if (match_string_p ("external")) | |
2880 | d = DECL_EXTERNAL; | |
2881 | break; | |
2882 | ||
2883 | case 'i': | |
2884 | if (match_string_p ("int")) | |
2885 | { | |
8fc541d3 | 2886 | ch = gfc_next_ascii_char (); |
f2449db4 RS |
2887 | if (ch == 'e') |
2888 | { | |
2889 | if (match_string_p ("nt")) | |
2890 | { | |
2891 | /* Matched "intent". */ | |
2892 | /* TODO: Call match_intent_spec from here. */ | |
2893 | if (gfc_match (" ( in out )") == MATCH_YES) | |
2894 | d = DECL_INOUT; | |
2895 | else if (gfc_match (" ( in )") == MATCH_YES) | |
2896 | d = DECL_IN; | |
2897 | else if (gfc_match (" ( out )") == MATCH_YES) | |
2898 | d = DECL_OUT; | |
2899 | } | |
2900 | } | |
2901 | else if (ch == 'r') | |
2902 | { | |
2903 | if (match_string_p ("insic")) | |
2904 | { | |
2905 | /* Matched "intrinsic". */ | |
2906 | d = DECL_INTRINSIC; | |
2907 | } | |
2908 | } | |
2909 | } | |
2910 | break; | |
2911 | ||
2912 | case 'o': | |
2913 | if (match_string_p ("optional")) | |
2914 | d = DECL_OPTIONAL; | |
2915 | break; | |
2916 | ||
2917 | case 'p': | |
8fc541d3 FXC |
2918 | gfc_next_ascii_char (); |
2919 | switch (gfc_next_ascii_char ()) | |
f2449db4 RS |
2920 | { |
2921 | case 'a': | |
2922 | if (match_string_p ("rameter")) | |
2923 | { | |
2924 | /* Matched "parameter". */ | |
2925 | d = DECL_PARAMETER; | |
2926 | } | |
2927 | break; | |
2928 | ||
2929 | case 'o': | |
2930 | if (match_string_p ("inter")) | |
2931 | { | |
2932 | /* Matched "pointer". */ | |
2933 | d = DECL_POINTER; | |
2934 | } | |
2935 | break; | |
2936 | ||
2937 | case 'r': | |
8fc541d3 | 2938 | ch = gfc_next_ascii_char (); |
f2449db4 RS |
2939 | if (ch == 'i') |
2940 | { | |
2941 | if (match_string_p ("vate")) | |
2942 | { | |
2943 | /* Matched "private". */ | |
2944 | d = DECL_PRIVATE; | |
2945 | } | |
2946 | } | |
2947 | else if (ch == 'o') | |
2948 | { | |
2949 | if (match_string_p ("tected")) | |
2950 | { | |
2951 | /* Matched "protected". */ | |
2952 | d = DECL_PROTECTED; | |
2953 | } | |
2954 | } | |
2955 | break; | |
2956 | ||
2957 | case 'u': | |
2958 | if (match_string_p ("blic")) | |
2959 | { | |
2960 | /* Matched "public". */ | |
2961 | d = DECL_PUBLIC; | |
2962 | } | |
2963 | break; | |
2964 | } | |
2965 | break; | |
2966 | ||
2967 | case 's': | |
2968 | if (match_string_p ("save")) | |
2969 | d = DECL_SAVE; | |
2970 | break; | |
2971 | ||
2972 | case 't': | |
2973 | if (match_string_p ("target")) | |
2974 | d = DECL_TARGET; | |
2975 | break; | |
2976 | ||
2977 | case 'v': | |
8fc541d3 FXC |
2978 | gfc_next_ascii_char (); |
2979 | ch = gfc_next_ascii_char (); | |
f2449db4 RS |
2980 | if (ch == 'a') |
2981 | { | |
2982 | if (match_string_p ("lue")) | |
2983 | { | |
2984 | /* Matched "value". */ | |
2985 | d = DECL_VALUE; | |
2986 | } | |
2987 | } | |
2988 | else if (ch == 'o') | |
2989 | { | |
2990 | if (match_string_p ("latile")) | |
2991 | { | |
2992 | /* Matched "volatile". */ | |
2993 | d = DECL_VOLATILE; | |
2994 | } | |
2995 | } | |
2996 | break; | |
a8b3b0b6 CR |
2997 | } |
2998 | } | |
d468bcdb | 2999 | |
f2449db4 RS |
3000 | /* No double colon and no recognizable decl_type, so assume that |
3001 | we've been looking at something else the whole time. */ | |
3002 | if (d == DECL_NONE) | |
3003 | { | |
3004 | m = MATCH_NO; | |
3005 | goto cleanup; | |
3006 | } | |
d51347f9 | 3007 | |
acb388a0 JD |
3008 | /* Check to make sure any parens are paired up correctly. */ |
3009 | if (gfc_match_parens () == MATCH_ERROR) | |
3010 | { | |
3011 | m = MATCH_ERROR; | |
3012 | goto cleanup; | |
3013 | } | |
3014 | ||
6de9cd9a | 3015 | seen[d]++; |
63645982 | 3016 | seen_at[d] = gfc_current_locus; |
6de9cd9a DN |
3017 | |
3018 | if (d == DECL_DIMENSION) | |
3019 | { | |
3020 | m = gfc_match_array_spec (¤t_as); | |
3021 | ||
3022 | if (m == MATCH_NO) | |
3023 | { | |
3024 | gfc_error ("Missing dimension specification at %C"); | |
3025 | m = MATCH_ERROR; | |
3026 | } | |
3027 | ||
3028 | if (m == MATCH_ERROR) | |
3029 | goto cleanup; | |
3030 | } | |
3031 | } | |
3032 | ||
6de9cd9a DN |
3033 | /* Since we've seen a double colon, we have to be looking at an |
3034 | attr-spec. This means that we can now issue errors. */ | |
3035 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3036 | if (seen[d] > 1) | |
3037 | { | |
3038 | switch (d) | |
3039 | { | |
3040 | case DECL_ALLOCATABLE: | |
3041 | attr = "ALLOCATABLE"; | |
3042 | break; | |
3043 | case DECL_DIMENSION: | |
3044 | attr = "DIMENSION"; | |
3045 | break; | |
3046 | case DECL_EXTERNAL: | |
3047 | attr = "EXTERNAL"; | |
3048 | break; | |
3049 | case DECL_IN: | |
3050 | attr = "INTENT (IN)"; | |
3051 | break; | |
3052 | case DECL_OUT: | |
3053 | attr = "INTENT (OUT)"; | |
3054 | break; | |
3055 | case DECL_INOUT: | |
3056 | attr = "INTENT (IN OUT)"; | |
3057 | break; | |
3058 | case DECL_INTRINSIC: | |
3059 | attr = "INTRINSIC"; | |
3060 | break; | |
3061 | case DECL_OPTIONAL: | |
3062 | attr = "OPTIONAL"; | |
3063 | break; | |
3064 | case DECL_PARAMETER: | |
3065 | attr = "PARAMETER"; | |
3066 | break; | |
3067 | case DECL_POINTER: | |
3068 | attr = "POINTER"; | |
3069 | break; | |
ee7e677f TB |
3070 | case DECL_PROTECTED: |
3071 | attr = "PROTECTED"; | |
3072 | break; | |
6de9cd9a DN |
3073 | case DECL_PRIVATE: |
3074 | attr = "PRIVATE"; | |
3075 | break; | |
3076 | case DECL_PUBLIC: | |
3077 | attr = "PUBLIC"; | |
3078 | break; | |
3079 | case DECL_SAVE: | |
3080 | attr = "SAVE"; | |
3081 | break; | |
3082 | case DECL_TARGET: | |
3083 | attr = "TARGET"; | |
3084 | break; | |
a8b3b0b6 CR |
3085 | case DECL_IS_BIND_C: |
3086 | attr = "IS_BIND_C"; | |
3087 | break; | |
3088 | case DECL_VALUE: | |
3089 | attr = "VALUE"; | |
3090 | break; | |
775e6c3a TB |
3091 | case DECL_VOLATILE: |
3092 | attr = "VOLATILE"; | |
3093 | break; | |
6de9cd9a | 3094 | default: |
66e4ab31 | 3095 | attr = NULL; /* This shouldn't happen. */ |
6de9cd9a DN |
3096 | } |
3097 | ||
3098 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
3099 | m = MATCH_ERROR; | |
3100 | goto cleanup; | |
3101 | } | |
3102 | ||
3103 | /* Now that we've dealt with duplicate attributes, add the attributes | |
3104 | to the current attribute. */ | |
3105 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3106 | { | |
3107 | if (seen[d] == 0) | |
3108 | continue; | |
3109 | ||
3110 | if (gfc_current_state () == COMP_DERIVED | |
3111 | && d != DECL_DIMENSION && d != DECL_POINTER | |
f2449db4 RS |
3112 | && d != DECL_PRIVATE && d != DECL_PUBLIC |
3113 | && d != DECL_NONE) | |
6de9cd9a | 3114 | { |
5046aff5 PT |
3115 | if (d == DECL_ALLOCATABLE) |
3116 | { | |
636dff67 SK |
3117 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
3118 | "attribute at %C in a TYPE definition") | |
d51347f9 | 3119 | == FAILURE) |
5046aff5 PT |
3120 | { |
3121 | m = MATCH_ERROR; | |
3122 | goto cleanup; | |
3123 | } | |
636dff67 SK |
3124 | } |
3125 | else | |
5046aff5 PT |
3126 | { |
3127 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
d51347f9 | 3128 | &seen_at[d]); |
5046aff5 PT |
3129 | m = MATCH_ERROR; |
3130 | goto cleanup; | |
3131 | } | |
6de9cd9a DN |
3132 | } |
3133 | ||
4213f93b | 3134 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
636dff67 | 3135 | && gfc_current_state () != COMP_MODULE) |
4213f93b PT |
3136 | { |
3137 | if (d == DECL_PRIVATE) | |
3138 | attr = "PRIVATE"; | |
3139 | else | |
3140 | attr = "PUBLIC"; | |
d51347f9 TB |
3141 | if (gfc_current_state () == COMP_DERIVED |
3142 | && gfc_state_stack->previous | |
3143 | && gfc_state_stack->previous->state == COMP_MODULE) | |
3144 | { | |
3145 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s " | |
3146 | "at %L in a TYPE definition", attr, | |
3147 | &seen_at[d]) | |
3148 | == FAILURE) | |
3149 | { | |
3150 | m = MATCH_ERROR; | |
3151 | goto cleanup; | |
3152 | } | |
3153 | } | |
3154 | else | |
3155 | { | |
3156 | gfc_error ("%s attribute at %L is not allowed outside of the " | |
3157 | "specification part of a module", attr, &seen_at[d]); | |
3158 | m = MATCH_ERROR; | |
3159 | goto cleanup; | |
3160 | } | |
4213f93b PT |
3161 | } |
3162 | ||
6de9cd9a DN |
3163 | switch (d) |
3164 | { | |
3165 | case DECL_ALLOCATABLE: | |
3166 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
3167 | break; | |
3168 | ||
3169 | case DECL_DIMENSION: | |
231b2fcc | 3170 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
3171 | break; |
3172 | ||
3173 | case DECL_EXTERNAL: | |
3174 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
3175 | break; | |
3176 | ||
3177 | case DECL_IN: | |
3178 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
3179 | break; | |
3180 | ||
3181 | case DECL_OUT: | |
3182 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
3183 | break; | |
3184 | ||
3185 | case DECL_INOUT: | |
3186 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
3187 | break; | |
3188 | ||
3189 | case DECL_INTRINSIC: | |
3190 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
3191 | break; | |
3192 | ||
3193 | case DECL_OPTIONAL: | |
3194 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
3195 | break; | |
3196 | ||
3197 | case DECL_PARAMETER: | |
231b2fcc | 3198 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
6de9cd9a DN |
3199 | break; |
3200 | ||
3201 | case DECL_POINTER: | |
3202 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
3203 | break; | |
3204 | ||
ee7e677f TB |
3205 | case DECL_PROTECTED: |
3206 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
3207 | { | |
3208 | gfc_error ("PROTECTED at %C only allowed in specification " | |
3209 | "part of a module"); | |
3210 | t = FAILURE; | |
3211 | break; | |
3212 | } | |
3213 | ||
636dff67 SK |
3214 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
3215 | "attribute at %C") | |
ee7e677f TB |
3216 | == FAILURE) |
3217 | t = FAILURE; | |
3218 | else | |
3219 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
3220 | break; | |
3221 | ||
6de9cd9a | 3222 | case DECL_PRIVATE: |
231b2fcc TS |
3223 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
3224 | &seen_at[d]); | |
6de9cd9a DN |
3225 | break; |
3226 | ||
3227 | case DECL_PUBLIC: | |
231b2fcc TS |
3228 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
3229 | &seen_at[d]); | |
6de9cd9a DN |
3230 | break; |
3231 | ||
3232 | case DECL_SAVE: | |
231b2fcc | 3233 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
3234 | break; |
3235 | ||
3236 | case DECL_TARGET: | |
3237 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
3238 | break; | |
3239 | ||
a8b3b0b6 CR |
3240 | case DECL_IS_BIND_C: |
3241 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); | |
3242 | break; | |
3243 | ||
06469efd | 3244 | case DECL_VALUE: |
636dff67 SK |
3245 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
3246 | "at %C") | |
06469efd PT |
3247 | == FAILURE) |
3248 | t = FAILURE; | |
3249 | else | |
3250 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
3251 | break; | |
3252 | ||
775e6c3a TB |
3253 | case DECL_VOLATILE: |
3254 | if (gfc_notify_std (GFC_STD_F2003, | |
636dff67 | 3255 | "Fortran 2003: VOLATILE attribute at %C") |
775e6c3a TB |
3256 | == FAILURE) |
3257 | t = FAILURE; | |
3258 | else | |
3259 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
3260 | break; | |
3261 | ||
6de9cd9a DN |
3262 | default: |
3263 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
3264 | } | |
3265 | ||
3266 | if (t == FAILURE) | |
3267 | { | |
3268 | m = MATCH_ERROR; | |
3269 | goto cleanup; | |
3270 | } | |
3271 | } | |
3272 | ||
3273 | colon_seen = 1; | |
3274 | return MATCH_YES; | |
3275 | ||
3276 | cleanup: | |
63645982 | 3277 | gfc_current_locus = start; |
6de9cd9a DN |
3278 | gfc_free_array_spec (current_as); |
3279 | current_as = NULL; | |
3280 | return m; | |
3281 | } | |
3282 | ||
3283 | ||
a8b3b0b6 CR |
3284 | /* Set the binding label, dest_label, either with the binding label |
3285 | stored in the given gfc_typespec, ts, or if none was provided, it | |
3286 | will be the symbol name in all lower case, as required by the draft | |
3287 | (J3/04-007, section 15.4.1). If a binding label was given and | |
3288 | there is more than one argument (num_idents), it is an error. */ | |
3289 | ||
17b1d2a0 | 3290 | gfc_try |
a8b3b0b6 CR |
3291 | set_binding_label (char *dest_label, const char *sym_name, int num_idents) |
3292 | { | |
ad4a2f64 | 3293 | if (num_idents > 1 && has_name_equals) |
a8b3b0b6 | 3294 | { |
ad4a2f64 TB |
3295 | gfc_error ("Multiple identifiers provided with " |
3296 | "single NAME= specifier at %C"); | |
3297 | return FAILURE; | |
3298 | } | |
a8b3b0b6 | 3299 | |
ad4a2f64 TB |
3300 | if (curr_binding_label[0] != '\0') |
3301 | { | |
a8b3b0b6 | 3302 | /* Binding label given; store in temp holder til have sym. */ |
c5b5a17a | 3303 | strcpy (dest_label, curr_binding_label); |
a8b3b0b6 CR |
3304 | } |
3305 | else | |
3306 | { | |
3307 | /* No binding label given, and the NAME= specifier did not exist, | |
3308 | which means there was no NAME="". */ | |
3309 | if (sym_name != NULL && has_name_equals == 0) | |
c5b5a17a | 3310 | strcpy (dest_label, sym_name); |
a8b3b0b6 CR |
3311 | } |
3312 | ||
3313 | return SUCCESS; | |
3314 | } | |
3315 | ||
3316 | ||
3317 | /* Set the status of the given common block as being BIND(C) or not, | |
3318 | depending on the given parameter, is_bind_c. */ | |
3319 | ||
3320 | void | |
3321 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) | |
3322 | { | |
3323 | com_block->is_bind_c = is_bind_c; | |
3324 | return; | |
3325 | } | |
3326 | ||
3327 | ||
3328 | /* Verify that the given gfc_typespec is for a C interoperable type. */ | |
3329 | ||
17b1d2a0 | 3330 | gfc_try |
2ec855f1 | 3331 | verify_c_interop (gfc_typespec *ts) |
a8b3b0b6 | 3332 | { |
a8b3b0b6 CR |
3333 | if (ts->type == BT_DERIVED && ts->derived != NULL) |
3334 | return (ts->derived->ts.is_c_interop ? SUCCESS : FAILURE); | |
3335 | else if (ts->is_c_interop != 1) | |
3336 | return FAILURE; | |
3337 | ||
3338 | return SUCCESS; | |
3339 | } | |
3340 | ||
3341 | ||
3342 | /* Verify that the variables of a given common block, which has been | |
3343 | defined with the attribute specifier bind(c), to be of a C | |
3344 | interoperable type. Errors will be reported here, if | |
3345 | encountered. */ | |
3346 | ||
17b1d2a0 | 3347 | gfc_try |
a8b3b0b6 CR |
3348 | verify_com_block_vars_c_interop (gfc_common_head *com_block) |
3349 | { | |
3350 | gfc_symbol *curr_sym = NULL; | |
17b1d2a0 | 3351 | gfc_try retval = SUCCESS; |
a8b3b0b6 CR |
3352 | |
3353 | curr_sym = com_block->head; | |
3354 | ||
3355 | /* Make sure we have at least one symbol. */ | |
3356 | if (curr_sym == NULL) | |
3357 | return retval; | |
3358 | ||
3359 | /* Here we know we have a symbol, so we'll execute this loop | |
3360 | at least once. */ | |
3361 | do | |
3362 | { | |
3363 | /* The second to last param, 1, says this is in a common block. */ | |
3364 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); | |
3365 | curr_sym = curr_sym->common_next; | |
3366 | } while (curr_sym != NULL); | |
3367 | ||
3368 | return retval; | |
3369 | } | |
3370 | ||
3371 | ||
3372 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, | |
3373 | an appropriate error message is reported. */ | |
3374 | ||
17b1d2a0 | 3375 | gfc_try |
a8b3b0b6 CR |
3376 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, |
3377 | int is_in_common, gfc_common_head *com_block) | |
3378 | { | |
8327f9c2 | 3379 | bool bind_c_function = false; |
17b1d2a0 | 3380 | gfc_try retval = SUCCESS; |
d8fa96e0 | 3381 | |
8327f9c2 TB |
3382 | if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c) |
3383 | bind_c_function = true; | |
3384 | ||
d8fa96e0 CR |
3385 | if (tmp_sym->attr.function && tmp_sym->result != NULL) |
3386 | { | |
3387 | tmp_sym = tmp_sym->result; | |
3388 | /* Make sure it wasn't an implicitly typed result. */ | |
3389 | if (tmp_sym->attr.implicit_type) | |
3390 | { | |
3391 | gfc_warning ("Implicitly declared BIND(C) function '%s' at " | |
3392 | "%L may not be C interoperable", tmp_sym->name, | |
3393 | &tmp_sym->declared_at); | |
3394 | tmp_sym->ts.f90_type = tmp_sym->ts.type; | |
3395 | /* Mark it as C interoperable to prevent duplicate warnings. */ | |
3396 | tmp_sym->ts.is_c_interop = 1; | |
3397 | tmp_sym->attr.is_c_interop = 1; | |
3398 | } | |
3399 | } | |
8327f9c2 | 3400 | |
a8b3b0b6 CR |
3401 | /* Here, we know we have the bind(c) attribute, so if we have |
3402 | enough type info, then verify that it's a C interop kind. | |
3403 | The info could be in the symbol already, or possibly still in | |
3404 | the given ts (current_ts), so look in both. */ | |
3405 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) | |
3406 | { | |
2ec855f1 | 3407 | if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS) |
a8b3b0b6 CR |
3408 | { |
3409 | /* See if we're dealing with a sym in a common block or not. */ | |
3410 | if (is_in_common == 1) | |
3411 | { | |
3412 | gfc_warning ("Variable '%s' in common block '%s' at %L " | |
3413 | "may not be a C interoperable " | |
3414 | "kind though common block '%s' is BIND(C)", | |
3415 | tmp_sym->name, com_block->name, | |
3416 | &(tmp_sym->declared_at), com_block->name); | |
3417 | } | |
3418 | else | |
3419 | { | |
3420 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) | |
3421 | gfc_error ("Type declaration '%s' at %L is not C " | |
3422 | "interoperable but it is BIND(C)", | |
3423 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3424 | else | |
3425 | gfc_warning ("Variable '%s' at %L " | |
3426 | "may not be a C interoperable " | |
3427 | "kind but it is bind(c)", | |
3428 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3429 | } | |
3430 | } | |
3431 | ||
3432 | /* Variables declared w/in a common block can't be bind(c) | |
3433 | since there's no way for C to see these variables, so there's | |
3434 | semantically no reason for the attribute. */ | |
3435 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) | |
3436 | { | |
3437 | gfc_error ("Variable '%s' in common block '%s' at " | |
3438 | "%L cannot be declared with BIND(C) " | |
3439 | "since it is not a global", | |
3440 | tmp_sym->name, com_block->name, | |
3441 | &(tmp_sym->declared_at)); | |
3442 | retval = FAILURE; | |
3443 | } | |
3444 | ||
3445 | /* Scalar variables that are bind(c) can not have the pointer | |
3446 | or allocatable attributes. */ | |
3447 | if (tmp_sym->attr.is_bind_c == 1) | |
3448 | { | |
3449 | if (tmp_sym->attr.pointer == 1) | |
3450 | { | |
3451 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3452 | "POINTER and BIND(C) attributes", | |
3453 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3454 | retval = FAILURE; | |
3455 | } | |
3456 | ||
3457 | if (tmp_sym->attr.allocatable == 1) | |
3458 | { | |
3459 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3460 | "ALLOCATABLE and BIND(C) attributes", | |
3461 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3462 | retval = FAILURE; | |
3463 | } | |
3464 | ||
8327f9c2 TB |
3465 | } |
3466 | ||
3467 | /* If it is a BIND(C) function, make sure the return value is a | |
3468 | scalar value. The previous tests in this function made sure | |
3469 | the type is interoperable. */ | |
3470 | if (bind_c_function && tmp_sym->as != NULL) | |
3471 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3472 | "be an array", tmp_sym->name, &(tmp_sym->declared_at)); | |
3473 | ||
3474 | /* BIND(C) functions can not return a character string. */ | |
3475 | if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER) | |
3476 | if (tmp_sym->ts.cl == NULL || tmp_sym->ts.cl->length == NULL | |
3477 | || tmp_sym->ts.cl->length->expr_type != EXPR_CONSTANT | |
3478 | || mpz_cmp_si (tmp_sym->ts.cl->length->value.integer, 1) != 0) | |
3479 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
a8b3b0b6 CR |
3480 | "be a character string", tmp_sym->name, |
3481 | &(tmp_sym->declared_at)); | |
a8b3b0b6 CR |
3482 | } |
3483 | ||
3484 | /* See if the symbol has been marked as private. If it has, make sure | |
3485 | there is no binding label and warn the user if there is one. */ | |
3486 | if (tmp_sym->attr.access == ACCESS_PRIVATE | |
3487 | && tmp_sym->binding_label[0] != '\0') | |
3488 | /* Use gfc_warning_now because we won't say that the symbol fails | |
3489 | just because of this. */ | |
3490 | gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " | |
3491 | "given the binding label '%s'", tmp_sym->name, | |
3492 | &(tmp_sym->declared_at), tmp_sym->binding_label); | |
3493 | ||
3494 | return retval; | |
3495 | } | |
3496 | ||
3497 | ||
3498 | /* Set the appropriate fields for a symbol that's been declared as | |
3499 | BIND(C) (the is_bind_c flag and the binding label), and verify that | |
3500 | the type is C interoperable. Errors are reported by the functions | |
3501 | used to set/test these fields. */ | |
3502 | ||
17b1d2a0 | 3503 | gfc_try |
a8b3b0b6 CR |
3504 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) |
3505 | { | |
17b1d2a0 | 3506 | gfc_try retval = SUCCESS; |
a8b3b0b6 CR |
3507 | |
3508 | /* TODO: Do we need to make sure the vars aren't marked private? */ | |
3509 | ||
3510 | /* Set the is_bind_c bit in symbol_attribute. */ | |
3511 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); | |
3512 | ||
3513 | if (set_binding_label (tmp_sym->binding_label, tmp_sym->name, | |
3514 | num_idents) != SUCCESS) | |
3515 | return FAILURE; | |
3516 | ||
3517 | return retval; | |
3518 | } | |
3519 | ||
3520 | ||
3521 | /* Set the fields marking the given common block as BIND(C), including | |
3522 | a binding label, and report any errors encountered. */ | |
3523 | ||
17b1d2a0 | 3524 | gfc_try |
a8b3b0b6 CR |
3525 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) |
3526 | { | |
17b1d2a0 | 3527 | gfc_try retval = SUCCESS; |
a8b3b0b6 CR |
3528 | |
3529 | /* destLabel, common name, typespec (which may have binding label). */ | |
3530 | if (set_binding_label (com_block->binding_label, com_block->name, num_idents) | |
3531 | != SUCCESS) | |
3532 | return FAILURE; | |
3533 | ||
3534 | /* Set the given common block (com_block) to being bind(c) (1). */ | |
3535 | set_com_block_bind_c (com_block, 1); | |
3536 | ||
3537 | return retval; | |
3538 | } | |
3539 | ||
3540 | ||
3541 | /* Retrieve the list of one or more identifiers that the given bind(c) | |
3542 | attribute applies to. */ | |
3543 | ||
17b1d2a0 | 3544 | gfc_try |
a8b3b0b6 CR |
3545 | get_bind_c_idents (void) |
3546 | { | |
3547 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3548 | int num_idents = 0; | |
3549 | gfc_symbol *tmp_sym = NULL; | |
3550 | match found_id; | |
3551 | gfc_common_head *com_block = NULL; | |
3552 | ||
3553 | if (gfc_match_name (name) == MATCH_YES) | |
3554 | { | |
3555 | found_id = MATCH_YES; | |
3556 | gfc_get_ha_symbol (name, &tmp_sym); | |
3557 | } | |
3558 | else if (match_common_name (name) == MATCH_YES) | |
3559 | { | |
3560 | found_id = MATCH_YES; | |
3561 | com_block = gfc_get_common (name, 0); | |
3562 | } | |
3563 | else | |
3564 | { | |
3565 | gfc_error ("Need either entity or common block name for " | |
3566 | "attribute specification statement at %C"); | |
3567 | return FAILURE; | |
3568 | } | |
3569 | ||
3570 | /* Save the current identifier and look for more. */ | |
3571 | do | |
3572 | { | |
3573 | /* Increment the number of identifiers found for this spec stmt. */ | |
3574 | num_idents++; | |
3575 | ||
3576 | /* Make sure we have a sym or com block, and verify that it can | |
3577 | be bind(c). Set the appropriate field(s) and look for more | |
3578 | identifiers. */ | |
3579 | if (tmp_sym != NULL || com_block != NULL) | |
3580 | { | |
3581 | if (tmp_sym != NULL) | |
3582 | { | |
3583 | if (set_verify_bind_c_sym (tmp_sym, num_idents) | |
3584 | != SUCCESS) | |
3585 | return FAILURE; | |
3586 | } | |
3587 | else | |
3588 | { | |
3589 | if (set_verify_bind_c_com_block(com_block, num_idents) | |
3590 | != SUCCESS) | |
3591 | return FAILURE; | |
3592 | } | |
3593 | ||
3594 | /* Look to see if we have another identifier. */ | |
3595 | tmp_sym = NULL; | |
3596 | if (gfc_match_eos () == MATCH_YES) | |
3597 | found_id = MATCH_NO; | |
3598 | else if (gfc_match_char (',') != MATCH_YES) | |
3599 | found_id = MATCH_NO; | |
3600 | else if (gfc_match_name (name) == MATCH_YES) | |
3601 | { | |
3602 | found_id = MATCH_YES; | |
3603 | gfc_get_ha_symbol (name, &tmp_sym); | |
3604 | } | |
3605 | else if (match_common_name (name) == MATCH_YES) | |
3606 | { | |
3607 | found_id = MATCH_YES; | |
3608 | com_block = gfc_get_common (name, 0); | |
3609 | } | |
3610 | else | |
3611 | { | |
3612 | gfc_error ("Missing entity or common block name for " | |
3613 | "attribute specification statement at %C"); | |
3614 | return FAILURE; | |
3615 | } | |
3616 | } | |
3617 | else | |
3618 | { | |
3619 | gfc_internal_error ("Missing symbol"); | |
3620 | } | |
3621 | } while (found_id == MATCH_YES); | |
3622 | ||
3623 | /* if we get here we were successful */ | |
3624 | return SUCCESS; | |
3625 | } | |
3626 | ||
3627 | ||
3628 | /* Try and match a BIND(C) attribute specification statement. */ | |
3629 | ||
3630 | match | |
3631 | gfc_match_bind_c_stmt (void) | |
3632 | { | |
3633 | match found_match = MATCH_NO; | |
3634 | gfc_typespec *ts; | |
3635 | ||
3636 | ts = ¤t_ts; | |
3637 | ||
3638 | /* This may not be necessary. */ | |
3639 | gfc_clear_ts (ts); | |
3640 | /* Clear the temporary binding label holder. */ | |
3641 | curr_binding_label[0] = '\0'; | |
3642 | ||
3643 | /* Look for the bind(c). */ | |
1eabf70a | 3644 | found_match = gfc_match_bind_c (NULL, true); |
a8b3b0b6 CR |
3645 | |
3646 | if (found_match == MATCH_YES) | |
3647 | { | |
3648 | /* Look for the :: now, but it is not required. */ | |
3649 | gfc_match (" :: "); | |
3650 | ||
3651 | /* Get the identifier(s) that needs to be updated. This may need to | |
3652 | change to hand the flag(s) for the attr specified so all identifiers | |
3653 | found can have all appropriate parts updated (assuming that the same | |
3654 | spec stmt can have multiple attrs, such as both bind(c) and | |
3655 | allocatable...). */ | |
3656 | if (get_bind_c_idents () != SUCCESS) | |
3657 | /* Error message should have printed already. */ | |
3658 | return MATCH_ERROR; | |
3659 | } | |
3660 | ||
3661 | return found_match; | |
3662 | } | |
3663 | ||
3664 | ||
6de9cd9a DN |
3665 | /* Match a data declaration statement. */ |
3666 | ||
3667 | match | |
3668 | gfc_match_data_decl (void) | |
3669 | { | |
3670 | gfc_symbol *sym; | |
3671 | match m; | |
949d5b72 | 3672 | int elem; |
6de9cd9a | 3673 | |
a8b3b0b6 CR |
3674 | num_idents_on_line = 0; |
3675 | ||
e2d29968 | 3676 | m = gfc_match_type_spec (¤t_ts, 0); |
6de9cd9a DN |
3677 | if (m != MATCH_YES) |
3678 | return m; | |
3679 | ||
3680 | if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) | |
3681 | { | |
3682 | sym = gfc_use_derived (current_ts.derived); | |
3683 | ||
3684 | if (sym == NULL) | |
3685 | { | |
3686 | m = MATCH_ERROR; | |
3687 | goto cleanup; | |
3688 | } | |
3689 | ||
3690 | current_ts.derived = sym; | |
3691 | } | |
3692 | ||
3693 | m = match_attr_spec (); | |
3694 | if (m == MATCH_ERROR) | |
3695 | { | |
3696 | m = MATCH_NO; | |
3697 | goto cleanup; | |
3698 | } | |
3699 | ||
9fa6b0af FXC |
3700 | if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL |
3701 | && !current_ts.derived->attr.zero_comp) | |
6de9cd9a DN |
3702 | { |
3703 | ||
3704 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
3705 | goto ok; | |
3706 | ||
976e21f6 | 3707 | gfc_find_symbol (current_ts.derived->name, |
636dff67 | 3708 | current_ts.derived->ns->parent, 1, &sym); |
6de9cd9a | 3709 | |
976e21f6 | 3710 | /* Any symbol that we find had better be a type definition |
636dff67 | 3711 | which has its components defined. */ |
976e21f6 | 3712 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
9fa6b0af FXC |
3713 | && (current_ts.derived->components != NULL |
3714 | || current_ts.derived->attr.zero_comp)) | |
6de9cd9a DN |
3715 | goto ok; |
3716 | ||
976e21f6 PT |
3717 | /* Now we have an error, which we signal, and then fix up |
3718 | because the knock-on is plain and simple confusing. */ | |
3719 | gfc_error_now ("Derived type at %C has not been previously defined " | |
636dff67 | 3720 | "and so cannot appear in a derived type definition"); |
976e21f6 PT |
3721 | current_attr.pointer = 1; |
3722 | goto ok; | |
6de9cd9a DN |
3723 | } |
3724 | ||
3725 | ok: | |
3726 | /* If we have an old-style character declaration, and no new-style | |
3727 | attribute specifications, then there a comma is optional between | |
3728 | the type specification and the variable list. */ | |
3729 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
3730 | gfc_match_char (','); | |
3731 | ||
949d5b72 PT |
3732 | /* Give the types/attributes to symbols that follow. Give the element |
3733 | a number so that repeat character length expressions can be copied. */ | |
3734 | elem = 1; | |
6de9cd9a DN |
3735 | for (;;) |
3736 | { | |
a8b3b0b6 | 3737 | num_idents_on_line++; |
949d5b72 | 3738 | m = variable_decl (elem++); |
6de9cd9a DN |
3739 | if (m == MATCH_ERROR) |
3740 | goto cleanup; | |
3741 | if (m == MATCH_NO) | |
3742 | break; | |
3743 | ||
3744 | if (gfc_match_eos () == MATCH_YES) | |
3745 | goto cleanup; | |
3746 | if (gfc_match_char (',') != MATCH_YES) | |
3747 | break; | |
3748 | } | |
3749 | ||
8f81c3c6 PT |
3750 | if (gfc_error_flag_test () == 0) |
3751 | gfc_error ("Syntax error in data declaration at %C"); | |
6de9cd9a DN |
3752 | m = MATCH_ERROR; |
3753 | ||
a9f6f1f2 JD |
3754 | gfc_free_data_all (gfc_current_ns); |
3755 | ||
6de9cd9a DN |
3756 | cleanup: |
3757 | gfc_free_array_spec (current_as); | |
3758 | current_as = NULL; | |
3759 | return m; | |
3760 | } | |
3761 | ||
3762 | ||
3763 | /* Match a prefix associated with a function or subroutine | |
3764 | declaration. If the typespec pointer is nonnull, then a typespec | |
3765 | can be matched. Note that if nothing matches, MATCH_YES is | |
3766 | returned (the null string was matched). */ | |
3767 | ||
1c8bcdf7 PT |
3768 | match |
3769 | gfc_match_prefix (gfc_typespec *ts) | |
6de9cd9a | 3770 | { |
7389bce6 | 3771 | bool seen_type; |
6de9cd9a DN |
3772 | |
3773 | gfc_clear_attr (¤t_attr); | |
3774 | seen_type = 0; | |
3775 | ||
3df684e2 DK |
3776 | gcc_assert (!gfc_matching_prefix); |
3777 | gfc_matching_prefix = true; | |
f37e928c | 3778 | |
6de9cd9a DN |
3779 | loop: |
3780 | if (!seen_type && ts != NULL | |
e2d29968 | 3781 | && gfc_match_type_spec (ts, 0) == MATCH_YES |
6de9cd9a DN |
3782 | && gfc_match_space () == MATCH_YES) |
3783 | { | |
3784 | ||
3785 | seen_type = 1; | |
3786 | goto loop; | |
3787 | } | |
3788 | ||
3789 | if (gfc_match ("elemental% ") == MATCH_YES) | |
3790 | { | |
3791 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
f37e928c | 3792 | goto error; |
6de9cd9a DN |
3793 | |
3794 | goto loop; | |
3795 | } | |
3796 | ||
3797 | if (gfc_match ("pure% ") == MATCH_YES) | |
3798 | { | |
3799 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
f37e928c | 3800 | goto error; |
6de9cd9a DN |
3801 | |
3802 | goto loop; | |
3803 | } | |
3804 | ||
3805 | if (gfc_match ("recursive% ") == MATCH_YES) | |
3806 | { | |
3807 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
f37e928c | 3808 | goto error; |
6de9cd9a DN |
3809 | |
3810 | goto loop; | |
3811 | } | |
3812 | ||
3813 | /* At this point, the next item is not a prefix. */ | |
3df684e2 DK |
3814 | gcc_assert (gfc_matching_prefix); |
3815 | gfc_matching_prefix = false; | |
6de9cd9a | 3816 | return MATCH_YES; |
f37e928c DK |
3817 | |
3818 | error: | |
3df684e2 DK |
3819 | gcc_assert (gfc_matching_prefix); |
3820 | gfc_matching_prefix = false; | |
f37e928c | 3821 | return MATCH_ERROR; |
6de9cd9a DN |
3822 | } |
3823 | ||
3824 | ||
1c8bcdf7 | 3825 | /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */ |
6de9cd9a | 3826 | |
17b1d2a0 | 3827 | static gfc_try |
636dff67 | 3828 | copy_prefix (symbol_attribute *dest, locus *where) |
6de9cd9a | 3829 | { |
6de9cd9a DN |
3830 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
3831 | return FAILURE; | |
3832 | ||
3833 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
3834 | return FAILURE; | |
3835 | ||
3836 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
3837 | return FAILURE; | |
3838 | ||
3839 | return SUCCESS; | |
3840 | } | |
3841 | ||
3842 | ||
3843 | /* Match a formal argument list. */ | |
3844 | ||
3845 | match | |
636dff67 | 3846 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
6de9cd9a DN |
3847 | { |
3848 | gfc_formal_arglist *head, *tail, *p, *q; | |
3849 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3850 | gfc_symbol *sym; | |
3851 | match m; | |
3852 | ||
3853 | head = tail = NULL; | |
3854 | ||
3855 | if (gfc_match_char ('(') != MATCH_YES) | |
3856 | { | |
3857 | if (null_flag) | |
3858 | goto ok; | |
3859 | return MATCH_NO; | |
3860 | } | |
3861 | ||
3862 | if (gfc_match_char (')') == MATCH_YES) | |
3863 | goto ok; | |
3864 | ||
3865 | for (;;) | |
3866 | { | |
3867 | if (gfc_match_char ('*') == MATCH_YES) | |
3868 | sym = NULL; | |
3869 | else | |
3870 | { | |
3871 | m = gfc_match_name (name); | |
3872 | if (m != MATCH_YES) | |
3873 | goto cleanup; | |
3874 | ||
3875 | if (gfc_get_symbol (name, NULL, &sym)) | |
3876 | goto cleanup; | |
3877 | } | |
3878 | ||
3879 | p = gfc_get_formal_arglist (); | |
3880 | ||
3881 | if (head == NULL) | |
3882 | head = tail = p; | |
3883 | else | |
3884 | { | |
3885 | tail->next = p; | |
3886 | tail = p; | |
3887 | } | |
3888 | ||
3889 | tail->sym = sym; | |
3890 | ||
3891 | /* We don't add the VARIABLE flavor because the name could be a | |
636dff67 SK |
3892 | dummy procedure. We don't apply these attributes to formal |
3893 | arguments of statement functions. */ | |
6de9cd9a | 3894 | if (sym != NULL && !st_flag |
231b2fcc | 3895 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
6de9cd9a DN |
3896 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
3897 | { | |
3898 | m = MATCH_ERROR; | |
3899 | goto cleanup; | |
3900 | } | |
3901 | ||
3902 | /* The name of a program unit can be in a different namespace, | |
636dff67 SK |
3903 | so check for it explicitly. After the statement is accepted, |
3904 | the name is checked for especially in gfc_get_symbol(). */ | |
6de9cd9a DN |
3905 | if (gfc_new_block != NULL && sym != NULL |
3906 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
3907 | { | |
3908 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
3909 | sym->name); | |
3910 | m = MATCH_ERROR; | |
3911 | goto cleanup; | |
3912 | } | |
3913 | ||
3914 | if (gfc_match_char (')') == MATCH_YES) | |
3915 | goto ok; | |
3916 | ||
3917 | m = gfc_match_char (','); | |
3918 | if (m != MATCH_YES) | |
3919 | { | |
3920 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
3921 | goto cleanup; | |
3922 | } | |
3923 | } | |
3924 | ||
3925 | ok: | |
3926 | /* Check for duplicate symbols in the formal argument list. */ | |
3927 | if (head != NULL) | |
3928 | { | |
3929 | for (p = head; p->next; p = p->next) | |
3930 | { | |
3931 | if (p->sym == NULL) | |
3932 | continue; | |
3933 | ||
3934 | for (q = p->next; q; q = q->next) | |
3935 | if (p->sym == q->sym) | |
3936 | { | |
636dff67 SK |
3937 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
3938 | "at %C", p->sym->name); | |
6de9cd9a DN |
3939 | |
3940 | m = MATCH_ERROR; | |
3941 | goto cleanup; | |
3942 | } | |
3943 | } | |
3944 | } | |
3945 | ||
66e4ab31 SK |
3946 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) |
3947 | == FAILURE) | |
6de9cd9a DN |
3948 | { |
3949 | m = MATCH_ERROR; | |
3950 | goto cleanup; | |
3951 | } | |
3952 | ||
3953 | return MATCH_YES; | |
3954 | ||
3955 | cleanup: | |
3956 | gfc_free_formal_arglist (head); | |
3957 | return m; | |
3958 | } | |
3959 | ||
3960 | ||
3961 | /* Match a RESULT specification following a function declaration or | |
3962 | ENTRY statement. Also matches the end-of-statement. */ | |
3963 | ||
3964 | static match | |
66e4ab31 | 3965 | match_result (gfc_symbol *function, gfc_symbol **result) |
6de9cd9a DN |
3966 | { |
3967 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3968 | gfc_symbol *r; | |
3969 | match m; | |
3970 | ||
3971 | if (gfc_match (" result (") != MATCH_YES) | |
3972 | return MATCH_NO; | |
3973 | ||
3974 | m = gfc_match_name (name); | |
3975 | if (m != MATCH_YES) | |
3976 | return m; | |
3977 | ||
a8b3b0b6 CR |
3978 | /* Get the right paren, and that's it because there could be the |
3979 | bind(c) attribute after the result clause. */ | |
3980 | if (gfc_match_char(')') != MATCH_YES) | |
6de9cd9a | 3981 | { |
a8b3b0b6 | 3982 | /* TODO: should report the missing right paren here. */ |
6de9cd9a DN |
3983 | return MATCH_ERROR; |
3984 | } | |
3985 | ||
3986 | if (strcmp (function->name, name) == 0) | |
3987 | { | |
636dff67 | 3988 | gfc_error ("RESULT variable at %C must be different than function name"); |
6de9cd9a DN |
3989 | return MATCH_ERROR; |
3990 | } | |
3991 | ||
3992 | if (gfc_get_symbol (name, NULL, &r)) | |
3993 | return MATCH_ERROR; | |
3994 | ||
726d8566 | 3995 | if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE) |
6de9cd9a DN |
3996 | return MATCH_ERROR; |
3997 | ||
3998 | *result = r; | |
3999 | ||
4000 | return MATCH_YES; | |
4001 | } | |
4002 | ||
4003 | ||
a8b3b0b6 CR |
4004 | /* Match a function suffix, which could be a combination of a result |
4005 | clause and BIND(C), either one, or neither. The draft does not | |
4006 | require them to come in a specific order. */ | |
4007 | ||
4008 | match | |
4009 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) | |
4010 | { | |
4011 | match is_bind_c; /* Found bind(c). */ | |
4012 | match is_result; /* Found result clause. */ | |
4013 | match found_match; /* Status of whether we've found a good match. */ | |
8fc541d3 | 4014 | char peek_char; /* Character we're going to peek at. */ |
1eabf70a | 4015 | bool allow_binding_name; |
a8b3b0b6 CR |
4016 | |
4017 | /* Initialize to having found nothing. */ | |
4018 | found_match = MATCH_NO; | |
4019 | is_bind_c = MATCH_NO; | |
4020 | is_result = MATCH_NO; | |
4021 | ||
4022 | /* Get the next char to narrow between result and bind(c). */ | |
4023 | gfc_gobble_whitespace (); | |
8fc541d3 | 4024 | peek_char = gfc_peek_ascii_char (); |
a8b3b0b6 | 4025 | |
1eabf70a TB |
4026 | /* C binding names are not allowed for internal procedures. */ |
4027 | if (gfc_current_state () == COMP_CONTAINS | |
4028 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
4029 | allow_binding_name = false; | |
4030 | else | |
4031 | allow_binding_name = true; | |
4032 | ||
a8b3b0b6 CR |
4033 | switch (peek_char) |
4034 | { | |
4035 | case 'r': | |
4036 | /* Look for result clause. */ | |
4037 | is_result = match_result (sym, result); | |
4038 | if (is_result == MATCH_YES) | |
4039 | { | |
4040 | /* Now see if there is a bind(c) after it. */ | |
1eabf70a | 4041 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
a8b3b0b6 CR |
4042 | /* We've found the result clause and possibly bind(c). */ |
4043 | found_match = MATCH_YES; | |
4044 | } | |
4045 | else | |
4046 | /* This should only be MATCH_ERROR. */ | |
4047 | found_match = is_result; | |
4048 | break; | |
4049 | case 'b': | |
4050 | /* Look for bind(c) first. */ | |
1eabf70a | 4051 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
a8b3b0b6 CR |
4052 | if (is_bind_c == MATCH_YES) |
4053 | { | |
4054 | /* Now see if a result clause followed it. */ | |
4055 | is_result = match_result (sym, result); | |
4056 | found_match = MATCH_YES; | |
4057 | } | |
4058 | else | |
4059 | { | |
4060 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ | |
4061 | found_match = MATCH_ERROR; | |
4062 | } | |
4063 | break; | |
4064 | default: | |
4065 | gfc_error ("Unexpected junk after function declaration at %C"); | |
4066 | found_match = MATCH_ERROR; | |
4067 | break; | |
4068 | } | |
4069 | ||
a8b3b0b6 | 4070 | if (is_bind_c == MATCH_YES) |
01f4fff1 | 4071 | { |
1eabf70a | 4072 | /* Fortran 2008 draft allows BIND(C) for internal procedures. */ |
01f4fff1 | 4073 | if (gfc_current_state () == COMP_CONTAINS |
1eabf70a | 4074 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
fdc54e88 FXC |
4075 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
4076 | "at %L may not be specified for an internal " | |
4077 | "procedure", &gfc_current_locus) | |
1eabf70a TB |
4078 | == FAILURE) |
4079 | return MATCH_ERROR; | |
4080 | ||
01f4fff1 TB |
4081 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) |
4082 | == FAILURE) | |
4083 | return MATCH_ERROR; | |
4084 | } | |
a8b3b0b6 CR |
4085 | |
4086 | return found_match; | |
4087 | } | |
4088 | ||
4089 | ||
3070bab4 JW |
4090 | /* Procedure pointer return value without RESULT statement: |
4091 | Add "hidden" result variable named "ppr@". */ | |
4092 | ||
4093 | static gfc_try | |
4094 | add_hidden_procptr_result (gfc_symbol *sym) | |
4095 | { | |
4096 | bool case1,case2; | |
4097 | ||
4098 | if (gfc_notification_std (GFC_STD_F2003) == ERROR) | |
4099 | return FAILURE; | |
4100 | ||
4101 | /* First usage case: PROCEDURE and EXTERNAL statements. */ | |
4102 | case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block () | |
4103 | && strcmp (gfc_current_block ()->name, sym->name) == 0 | |
4104 | && sym->attr.external; | |
4105 | /* Second usage case: INTERFACE statements. */ | |
4106 | case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous | |
4107 | && gfc_state_stack->previous->state == COMP_FUNCTION | |
4108 | && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0; | |
4109 | ||
4110 | if (case1 || case2) | |
4111 | { | |
4112 | gfc_symtree *stree; | |
4113 | if (case1) | |
08a6b8e0 | 4114 | gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false); |
3070bab4 | 4115 | else if (case2) |
c73b6478 JW |
4116 | { |
4117 | gfc_symtree *st2; | |
08a6b8e0 | 4118 | gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false); |
c73b6478 JW |
4119 | st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@"); |
4120 | st2->n.sym = stree->n.sym; | |
4121 | } | |
3070bab4 JW |
4122 | sym->result = stree->n.sym; |
4123 | ||
4124 | sym->result->attr.proc_pointer = sym->attr.proc_pointer; | |
4125 | sym->result->attr.pointer = sym->attr.pointer; | |
4126 | sym->result->attr.external = sym->attr.external; | |
4127 | sym->result->attr.referenced = sym->attr.referenced; | |
fc9c6e5d | 4128 | sym->result->ts = sym->ts; |
3070bab4 JW |
4129 | sym->attr.proc_pointer = 0; |
4130 | sym->attr.pointer = 0; | |
4131 | sym->attr.external = 0; | |
4132 | if (sym->result->attr.external && sym->result->attr.pointer) | |
4133 | { | |
4134 | sym->result->attr.pointer = 0; | |
4135 | sym->result->attr.proc_pointer = 1; | |
4136 | } | |
4137 | ||
4138 | return gfc_add_result (&sym->result->attr, sym->result->name, NULL); | |
4139 | } | |
4140 | /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */ | |
4141 | else if (sym->attr.function && !sym->attr.external && sym->attr.pointer | |
4142 | && sym->result && sym->result != sym && sym->result->attr.external | |
4143 | && sym == gfc_current_ns->proc_name | |
4144 | && sym == sym->result->ns->proc_name | |
4145 | && strcmp ("ppr@", sym->result->name) == 0) | |
4146 | { | |
4147 | sym->result->attr.proc_pointer = 1; | |
4148 | sym->attr.pointer = 0; | |
4149 | return SUCCESS; | |
4150 | } | |
4151 | else | |
4152 | return FAILURE; | |
4153 | } | |
4154 | ||
4155 | ||
713485cc JW |
4156 | /* Match the interface for a PROCEDURE declaration, |
4157 | including brackets (R1212). */ | |
69773742 JW |
4158 | |
4159 | static match | |
713485cc | 4160 | match_procedure_interface (gfc_symbol **proc_if) |
69773742 JW |
4161 | { |
4162 | match m; | |
3276e0b3 | 4163 | gfc_symtree *st; |
69773742 | 4164 | locus old_loc, entry_loc; |
3276e0b3 PT |
4165 | gfc_namespace *old_ns = gfc_current_ns; |
4166 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
69773742 | 4167 | |
3276e0b3 | 4168 | old_loc = entry_loc = gfc_current_locus; |
69773742 JW |
4169 | gfc_clear_ts (¤t_ts); |
4170 | ||
4171 | if (gfc_match (" (") != MATCH_YES) | |
4172 | { | |
4173 | gfc_current_locus = entry_loc; | |
4174 | return MATCH_NO; | |
4175 | } | |
4176 | ||
4177 | /* Get the type spec. for the procedure interface. */ | |
4178 | old_loc = gfc_current_locus; | |
e2d29968 | 4179 | m = gfc_match_type_spec (¤t_ts, 0); |
f4256439 | 4180 | gfc_gobble_whitespace (); |
8fc541d3 | 4181 | if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')')) |
69773742 JW |
4182 | goto got_ts; |
4183 | ||
4184 | if (m == MATCH_ERROR) | |
4185 | return m; | |
4186 | ||
3276e0b3 | 4187 | /* Procedure interface is itself a procedure. */ |
69773742 | 4188 | gfc_current_locus = old_loc; |
3276e0b3 | 4189 | m = gfc_match_name (name); |
69773742 | 4190 | |
3276e0b3 PT |
4191 | /* First look to see if it is already accessible in the current |
4192 | namespace because it is use associated or contained. */ | |
4193 | st = NULL; | |
4194 | if (gfc_find_sym_tree (name, NULL, 0, &st)) | |
4195 | return MATCH_ERROR; | |
4196 | ||
4197 | /* If it is still not found, then try the parent namespace, if it | |
4198 | exists and create the symbol there if it is still not found. */ | |
4199 | if (gfc_current_ns->parent) | |
4200 | gfc_current_ns = gfc_current_ns->parent; | |
4201 | if (st == NULL && gfc_get_ha_sym_tree (name, &st)) | |
4202 | return MATCH_ERROR; | |
4203 | ||
4204 | gfc_current_ns = old_ns; | |
4205 | *proc_if = st->n.sym; | |
69773742 JW |
4206 | |
4207 | /* Various interface checks. */ | |
713485cc | 4208 | if (*proc_if) |
69773742 | 4209 | { |
713485cc | 4210 | (*proc_if)->refs++; |
bb343a6c TB |
4211 | /* Resolve interface if possible. That way, attr.procedure is only set |
4212 | if it is declared by a later procedure-declaration-stmt, which is | |
4213 | invalid per C1212. */ | |
713485cc JW |
4214 | while ((*proc_if)->ts.interface) |
4215 | *proc_if = (*proc_if)->ts.interface; | |
bb343a6c | 4216 | |
713485cc | 4217 | if ((*proc_if)->generic) |
69773742 | 4218 | { |
713485cc JW |
4219 | gfc_error ("Interface '%s' at %C may not be generic", |
4220 | (*proc_if)->name); | |
69773742 JW |
4221 | return MATCH_ERROR; |
4222 | } | |
713485cc | 4223 | if ((*proc_if)->attr.proc == PROC_ST_FUNCTION) |
69773742 JW |
4224 | { |
4225 | gfc_error ("Interface '%s' at %C may not be a statement function", | |
713485cc | 4226 | (*proc_if)->name); |
69773742 JW |
4227 | return MATCH_ERROR; |
4228 | } | |
4229 | /* Handle intrinsic procedures. */ | |
713485cc JW |
4230 | if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc |
4231 | || (*proc_if)->attr.if_source == IFSRC_IFBODY) | |
4232 | && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus) | |
4233 | || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus))) | |
4234 | (*proc_if)->attr.intrinsic = 1; | |
4235 | if ((*proc_if)->attr.intrinsic | |
4236 | && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0)) | |
69773742 JW |
4237 | { |
4238 | gfc_error ("Intrinsic procedure '%s' not allowed " | |
713485cc | 4239 | "in PROCEDURE statement at %C", (*proc_if)->name); |
69773742 JW |
4240 | return MATCH_ERROR; |
4241 | } | |
69773742 JW |
4242 | } |
4243 | ||
4244 | got_ts: | |
69773742 JW |
4245 | if (gfc_match (" )") != MATCH_YES) |
4246 | { | |
4247 | gfc_current_locus = entry_loc; | |
4248 | return MATCH_NO; | |
4249 | } | |
4250 | ||
713485cc JW |
4251 | return MATCH_YES; |
4252 | } | |
4253 | ||
4254 | ||
4255 | /* Match a PROCEDURE declaration (R1211). */ | |
4256 | ||
4257 | static match | |
4258 | match_procedure_decl (void) | |
4259 | { | |
4260 | match m; | |
4261 | gfc_symbol *sym, *proc_if = NULL; | |
4262 | int num; | |
4263 | gfc_expr *initializer = NULL; | |
4264 | ||
4265 | /* Parse interface (with brackets). */ | |
4266 | m = match_procedure_interface (&proc_if); | |
4267 | if (m != MATCH_YES) | |
4268 | return m; | |
4269 | ||
4270 | /* Parse attributes (with colons). */ | |
69773742 JW |
4271 | m = match_attr_spec(); |
4272 | if (m == MATCH_ERROR) | |
4273 | return MATCH_ERROR; | |
4274 | ||
4275 | /* Get procedure symbols. */ | |
4276 | for(num=1;;num++) | |
4277 | { | |
69773742 JW |
4278 | m = gfc_match_symbol (&sym, 0); |
4279 | if (m == MATCH_NO) | |
4280 | goto syntax; | |
4281 | else if (m == MATCH_ERROR) | |
4282 | return m; | |
4283 | ||
4284 | /* Add current_attr to the symbol attributes. */ | |
4285 | if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
4286 | return MATCH_ERROR; | |
4287 | ||
4288 | if (sym->attr.is_bind_c) | |
4289 | { | |
4290 | /* Check for C1218. */ | |
4291 | if (!proc_if || !proc_if->attr.is_bind_c) | |
4292 | { | |
4293 | gfc_error ("BIND(C) attribute at %C requires " | |
4294 | "an interface with BIND(C)"); | |
4295 | return MATCH_ERROR; | |
4296 | } | |
4297 | /* Check for C1217. */ | |
4298 | if (has_name_equals && sym->attr.pointer) | |
4299 | { | |
4300 | gfc_error ("BIND(C) procedure with NAME may not have " | |
4301 | "POINTER attribute at %C"); | |
4302 | return MATCH_ERROR; | |
4303 | } | |
4304 | if (has_name_equals && sym->attr.dummy) | |
4305 | { | |
4306 | gfc_error ("Dummy procedure at %C may not have " | |
4307 | "BIND(C) attribute with NAME"); | |
4308 | return MATCH_ERROR; | |
4309 | } | |
4310 | /* Set binding label for BIND(C). */ | |
4311 | if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS) | |
4312 | return MATCH_ERROR; | |
4313 | } | |
4314 | ||
8fb74da4 | 4315 | if (gfc_add_external (&sym->attr, NULL) == FAILURE) |
69773742 | 4316 | return MATCH_ERROR; |
3070bab4 JW |
4317 | |
4318 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4319 | sym = sym->result; | |
4320 | ||
69773742 JW |
4321 | if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE) |
4322 | return MATCH_ERROR; | |
4323 | ||
4324 | /* Set interface. */ | |
4325 | if (proc_if != NULL) | |
6cc309c9 | 4326 | { |
1d146030 JW |
4327 | if (sym->ts.type != BT_UNKNOWN) |
4328 | { | |
4329 | gfc_error ("Procedure '%s' at %L already has basic type of %s", | |
4330 | sym->name, &gfc_current_locus, | |
4331 | gfc_basic_typename (sym->ts.type)); | |
4332 | return MATCH_ERROR; | |
4333 | } | |
32d99e68 | 4334 | sym->ts.interface = proc_if; |
6cc309c9 | 4335 | sym->attr.untyped = 1; |
c73b6478 | 4336 | sym->attr.if_source = IFSRC_IFBODY; |
6cc309c9 | 4337 | } |
69773742 JW |
4338 | else if (current_ts.type != BT_UNKNOWN) |
4339 | { | |
1d146030 JW |
4340 | if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) |
4341 | return MATCH_ERROR; | |
32d99e68 JW |
4342 | sym->ts.interface = gfc_new_symbol ("", gfc_current_ns); |
4343 | sym->ts.interface->ts = current_ts; | |
4344 | sym->ts.interface->attr.function = 1; | |
4345 | sym->attr.function = sym->ts.interface->attr.function; | |
c73b6478 | 4346 | sym->attr.if_source = IFSRC_UNKNOWN; |
69773742 JW |
4347 | } |
4348 | ||
8fb74da4 JW |
4349 | if (gfc_match (" =>") == MATCH_YES) |
4350 | { | |
4351 | if (!current_attr.pointer) | |
4352 | { | |
4353 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
4354 | m = MATCH_ERROR; | |
4355 | goto cleanup; | |
4356 | } | |
4357 | ||
4358 | m = gfc_match_null (&initializer); | |
4359 | if (m == MATCH_NO) | |
4360 | { | |
4361 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4362 | m = MATCH_ERROR; | |
4363 | } | |
4364 | ||
4365 | if (gfc_pure (NULL)) | |
4366 | { | |
4367 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4368 | "a PURE procedure"); | |
4369 | m = MATCH_ERROR; | |
4370 | } | |
4371 | ||
4372 | if (m != MATCH_YES) | |
4373 | goto cleanup; | |
4374 | ||
4375 | if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus) | |
4376 | != SUCCESS) | |
4377 | goto cleanup; | |
4378 | ||
4379 | } | |
4380 | ||
4381 | gfc_set_sym_referenced (sym); | |
4382 | ||
69773742 JW |
4383 | if (gfc_match_eos () == MATCH_YES) |
4384 | return MATCH_YES; | |
4385 | if (gfc_match_char (',') != MATCH_YES) | |
4386 | goto syntax; | |
4387 | } | |
4388 | ||
4389 | syntax: | |
4390 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4391 | return MATCH_ERROR; | |
8fb74da4 JW |
4392 | |
4393 | cleanup: | |
4394 | /* Free stuff up and return. */ | |
4395 | gfc_free_expr (initializer); | |
4396 | return m; | |
69773742 JW |
4397 | } |
4398 | ||
4399 | ||
713485cc JW |
4400 | static match |
4401 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc); | |
4402 | ||
4403 | ||
4404 | /* Match a procedure pointer component declaration (R445). */ | |
4405 | ||
4406 | static match | |
4407 | match_ppc_decl (void) | |
4408 | { | |
4409 | match m; | |
4410 | gfc_symbol *proc_if = NULL; | |
4411 | gfc_typespec ts; | |
4412 | int num; | |
4413 | gfc_component *c; | |
4414 | gfc_expr *initializer = NULL; | |
4415 | gfc_typebound_proc* tb; | |
4416 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4417 | ||
4418 | /* Parse interface (with brackets). */ | |
4419 | m = match_procedure_interface (&proc_if); | |
4420 | if (m != MATCH_YES) | |
4421 | goto syntax; | |
4422 | ||
4423 | /* Parse attributes. */ | |
4424 | tb = XCNEW (gfc_typebound_proc); | |
4425 | tb->where = gfc_current_locus; | |
4426 | m = match_binding_attributes (tb, false, true); | |
4427 | if (m == MATCH_ERROR) | |
4428 | return m; | |
4429 | ||
713485cc JW |
4430 | gfc_clear_attr (¤t_attr); |
4431 | current_attr.procedure = 1; | |
4432 | current_attr.proc_pointer = 1; | |
4433 | current_attr.access = tb->access; | |
4434 | current_attr.flavor = FL_PROCEDURE; | |
4435 | ||
4436 | /* Match the colons (required). */ | |
4437 | if (gfc_match (" ::") != MATCH_YES) | |
4438 | { | |
4439 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
4440 | return MATCH_ERROR; | |
4441 | } | |
4442 | ||
4443 | /* Check for C450. */ | |
4444 | if (!tb->nopass && proc_if == NULL) | |
4445 | { | |
4446 | gfc_error("NOPASS or explicit interface required at %C"); | |
4447 | return MATCH_ERROR; | |
4448 | } | |
4449 | ||
4450 | /* Match PPC names. */ | |
4451 | ts = current_ts; | |
4452 | for(num=1;;num++) | |
4453 | { | |
4454 | m = gfc_match_name (name); | |
4455 | if (m == MATCH_NO) | |
4456 | goto syntax; | |
4457 | else if (m == MATCH_ERROR) | |
4458 | return m; | |
4459 | ||
4460 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
4461 | return MATCH_ERROR; | |
4462 | ||
4463 | /* Add current_attr to the symbol attributes. */ | |
4464 | if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE) | |
4465 | return MATCH_ERROR; | |
4466 | ||
4467 | if (gfc_add_external (&c->attr, NULL) == FAILURE) | |
4468 | return MATCH_ERROR; | |
4469 | ||
4470 | if (gfc_add_proc (&c->attr, name, NULL) == FAILURE) | |
4471 | return MATCH_ERROR; | |
4472 | ||
90661f26 JW |
4473 | c->tb = tb; |
4474 | ||
713485cc JW |
4475 | /* Set interface. */ |
4476 | if (proc_if != NULL) | |
4477 | { | |
4478 | c->ts.interface = proc_if; | |
4479 | c->attr.untyped = 1; | |
4480 | c->attr.if_source = IFSRC_IFBODY; | |
4481 | } | |
4482 | else if (ts.type != BT_UNKNOWN) | |
4483 | { | |
4484 | c->ts = ts; | |
4485 | c->ts.interface = gfc_new_symbol ("", gfc_current_ns); | |
4486 | c->ts.interface->ts = ts; | |
4487 | c->ts.interface->attr.function = 1; | |
4488 | c->attr.function = c->ts.interface->attr.function; | |
4489 | c->attr.if_source = IFSRC_UNKNOWN; | |
4490 | } | |
4491 | ||
4492 | if (gfc_match (" =>") == MATCH_YES) | |
4493 | { | |
4494 | m = gfc_match_null (&initializer); | |
4495 | if (m == MATCH_NO) | |
4496 | { | |
4497 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4498 | m = MATCH_ERROR; | |
4499 | } | |
4500 | if (gfc_pure (NULL)) | |
4501 | { | |
4502 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4503 | "a PURE procedure"); | |
4504 | m = MATCH_ERROR; | |
4505 | } | |
4506 | if (m != MATCH_YES) | |
4507 | { | |
4508 | gfc_free_expr (initializer); | |
4509 | return m; | |
4510 | } | |
4511 | c->initializer = initializer; | |
4512 | } | |
4513 | ||
4514 | if (gfc_match_eos () == MATCH_YES) | |
4515 | return MATCH_YES; | |
4516 | if (gfc_match_char (',') != MATCH_YES) | |
4517 | goto syntax; | |
4518 | } | |
4519 | ||
4520 | syntax: | |
4521 | gfc_error ("Syntax error in procedure pointer component at %C"); | |
4522 | return MATCH_ERROR; | |
4523 | } | |
4524 | ||
4525 | ||
69773742 JW |
4526 | /* Match a PROCEDURE declaration inside an interface (R1206). */ |
4527 | ||
4528 | static match | |
4529 | match_procedure_in_interface (void) | |
4530 | { | |
4531 | match m; | |
4532 | gfc_symbol *sym; | |
4533 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4534 | ||
4535 | if (current_interface.type == INTERFACE_NAMELESS | |
4536 | || current_interface.type == INTERFACE_ABSTRACT) | |
4537 | { | |
4538 | gfc_error ("PROCEDURE at %C must be in a generic interface"); | |
4539 | return MATCH_ERROR; | |
4540 | } | |
4541 | ||
4542 | for(;;) | |
4543 | { | |
4544 | m = gfc_match_name (name); | |
4545 | if (m == MATCH_NO) | |
4546 | goto syntax; | |
4547 | else if (m == MATCH_ERROR) | |
4548 | return m; | |
4549 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
4550 | return MATCH_ERROR; | |
4551 | ||
4552 | if (gfc_add_interface (sym) == FAILURE) | |
4553 | return MATCH_ERROR; | |
4554 | ||
69773742 JW |
4555 | if (gfc_match_eos () == MATCH_YES) |
4556 | break; | |
4557 | if (gfc_match_char (',') != MATCH_YES) | |
4558 | goto syntax; | |
4559 | } | |
4560 | ||
4561 | return MATCH_YES; | |
4562 | ||
4563 | syntax: | |
4564 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4565 | return MATCH_ERROR; | |
4566 | } | |
4567 | ||
4568 | ||
4569 | /* General matcher for PROCEDURE declarations. */ | |
4570 | ||
30b608eb DK |
4571 | static match match_procedure_in_type (void); |
4572 | ||
69773742 JW |
4573 | match |
4574 | gfc_match_procedure (void) | |
4575 | { | |
4576 | match m; | |
4577 | ||
4578 | switch (gfc_current_state ()) | |
4579 | { | |
4580 | case COMP_NONE: | |
4581 | case COMP_PROGRAM: | |
4582 | case COMP_MODULE: | |
4583 | case COMP_SUBROUTINE: | |
4584 | case COMP_FUNCTION: | |
4585 | m = match_procedure_decl (); | |
4586 | break; | |
4587 | case COMP_INTERFACE: | |
4588 | m = match_procedure_in_interface (); | |
4589 | break; | |
4590 | case COMP_DERIVED: | |
713485cc JW |
4591 | m = match_ppc_decl (); |
4592 | break; | |
30b608eb DK |
4593 | case COMP_DERIVED_CONTAINS: |
4594 | m = match_procedure_in_type (); | |
4595 | break; | |
69773742 JW |
4596 | default: |
4597 | return MATCH_NO; | |
4598 | } | |
4599 | ||
4600 | if (m != MATCH_YES) | |
4601 | return m; | |
4602 | ||
4603 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C") | |
4604 | == FAILURE) | |
4605 | return MATCH_ERROR; | |
4606 | ||
4607 | return m; | |
4608 | } | |
4609 | ||
4610 | ||
c3005b0f DK |
4611 | /* Warn if a matched procedure has the same name as an intrinsic; this is |
4612 | simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current | |
4613 | parser-state-stack to find out whether we're in a module. */ | |
4614 | ||
4615 | static void | |
4616 | warn_intrinsic_shadow (const gfc_symbol* sym, bool func) | |
4617 | { | |
4618 | bool in_module; | |
4619 | ||
4620 | in_module = (gfc_state_stack->previous | |
4621 | && gfc_state_stack->previous->state == COMP_MODULE); | |
4622 | ||
4623 | gfc_warn_intrinsic_shadow (sym, in_module, func); | |
4624 | } | |
4625 | ||
4626 | ||
6de9cd9a DN |
4627 | /* Match a function declaration. */ |
4628 | ||
4629 | match | |
4630 | gfc_match_function_decl (void) | |
4631 | { | |
4632 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4633 | gfc_symbol *sym, *result; | |
4634 | locus old_loc; | |
4635 | match m; | |
a8b3b0b6 CR |
4636 | match suffix_match; |
4637 | match found_match; /* Status returned by match func. */ | |
6de9cd9a DN |
4638 | |
4639 | if (gfc_current_state () != COMP_NONE | |
4640 | && gfc_current_state () != COMP_INTERFACE | |
4641 | && gfc_current_state () != COMP_CONTAINS) | |
4642 | return MATCH_NO; | |
4643 | ||
4644 | gfc_clear_ts (¤t_ts); | |
4645 | ||
63645982 | 4646 | old_loc = gfc_current_locus; |
6de9cd9a | 4647 | |
1c8bcdf7 | 4648 | m = gfc_match_prefix (¤t_ts); |
6de9cd9a DN |
4649 | if (m != MATCH_YES) |
4650 | { | |
63645982 | 4651 | gfc_current_locus = old_loc; |
6de9cd9a DN |
4652 | return m; |
4653 | } | |
4654 | ||
4655 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
4656 | { | |
63645982 | 4657 | gfc_current_locus = old_loc; |
6de9cd9a DN |
4658 | return MATCH_NO; |
4659 | } | |
1a492601 | 4660 | if (get_proc_name (name, &sym, false)) |
6de9cd9a | 4661 | return MATCH_ERROR; |
3070bab4 JW |
4662 | |
4663 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4664 | sym = sym->result; | |
4665 | ||
6de9cd9a DN |
4666 | gfc_new_block = sym; |
4667 | ||
4668 | m = gfc_match_formal_arglist (sym, 0, 0); | |
4669 | if (m == MATCH_NO) | |
2b9a33ae TS |
4670 | { |
4671 | gfc_error ("Expected formal argument list in function " | |
636dff67 | 4672 | "definition at %C"); |
2b9a33ae TS |
4673 | m = MATCH_ERROR; |
4674 | goto cleanup; | |
4675 | } | |
6de9cd9a DN |
4676 | else if (m == MATCH_ERROR) |
4677 | goto cleanup; | |
4678 | ||
4679 | result = NULL; | |
4680 | ||
a8b3b0b6 CR |
4681 | /* According to the draft, the bind(c) and result clause can |
4682 | come in either order after the formal_arg_list (i.e., either | |
4683 | can be first, both can exist together or by themselves or neither | |
4684 | one). Therefore, the match_result can't match the end of the | |
4685 | string, and check for the bind(c) or result clause in either order. */ | |
4686 | found_match = gfc_match_eos (); | |
4687 | ||
4688 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
4689 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4690 | not allowed for procedures. */ | |
4691 | if (sym->attr.is_bind_c == 1) | |
4692 | { | |
4693 | sym->attr.is_bind_c = 0; | |
4694 | if (sym->old_symbol != NULL) | |
4695 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4696 | "variables or common blocks", | |
4697 | &(sym->old_symbol->declared_at)); | |
4698 | else | |
4699 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4700 | "variables or common blocks", &gfc_current_locus); | |
6de9cd9a DN |
4701 | } |
4702 | ||
a8b3b0b6 | 4703 | if (found_match != MATCH_YES) |
6de9cd9a | 4704 | { |
a8b3b0b6 CR |
4705 | /* If we haven't found the end-of-statement, look for a suffix. */ |
4706 | suffix_match = gfc_match_suffix (sym, &result); | |
4707 | if (suffix_match == MATCH_YES) | |
4708 | /* Need to get the eos now. */ | |
4709 | found_match = gfc_match_eos (); | |
4710 | else | |
4711 | found_match = suffix_match; | |
6de9cd9a DN |
4712 | } |
4713 | ||
a8b3b0b6 CR |
4714 | if(found_match != MATCH_YES) |
4715 | m = MATCH_ERROR; | |
6de9cd9a DN |
4716 | else |
4717 | { | |
a8b3b0b6 CR |
4718 | /* Make changes to the symbol. */ |
4719 | m = MATCH_ERROR; | |
4720 | ||
4721 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) | |
4722 | goto cleanup; | |
4723 | ||
4724 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
4725 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4726 | goto cleanup; | |
6de9cd9a | 4727 | |
a99d95a2 | 4728 | /* Delay matching the function characteristics until after the |
1c8bcdf7 | 4729 | specification block by signalling kind=-1. */ |
a99d95a2 PT |
4730 | sym->declared_at = old_loc; |
4731 | if (current_ts.type != BT_UNKNOWN) | |
4732 | current_ts.kind = -1; | |
4733 | else | |
4734 | current_ts.kind = 0; | |
1c8bcdf7 | 4735 | |
a8b3b0b6 CR |
4736 | if (result == NULL) |
4737 | { | |
6de7294f JW |
4738 | if (current_ts.type != BT_UNKNOWN |
4739 | && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) | |
4740 | goto cleanup; | |
a8b3b0b6 CR |
4741 | sym->result = sym; |
4742 | } | |
4743 | else | |
4744 | { | |
6de7294f JW |
4745 | if (current_ts.type != BT_UNKNOWN |
4746 | && gfc_add_type (result, ¤t_ts, &gfc_current_locus) | |
4747 | == FAILURE) | |
4748 | goto cleanup; | |
a8b3b0b6 CR |
4749 | sym->result = result; |
4750 | } | |
4751 | ||
c3005b0f DK |
4752 | /* Warn if this procedure has the same name as an intrinsic. */ |
4753 | warn_intrinsic_shadow (sym, true); | |
4754 | ||
a8b3b0b6 CR |
4755 | return MATCH_YES; |
4756 | } | |
6de9cd9a DN |
4757 | |
4758 | cleanup: | |
63645982 | 4759 | gfc_current_locus = old_loc; |
6de9cd9a DN |
4760 | return m; |
4761 | } | |
4762 | ||
636dff67 SK |
4763 | |
4764 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
4765 | pass the name of the entry, rather than the gfc_current_block name, and | |
4766 | to return false upon finding an existing global entry. */ | |
68ea355b PT |
4767 | |
4768 | static bool | |
636dff67 | 4769 | add_global_entry (const char *name, int sub) |
68ea355b PT |
4770 | { |
4771 | gfc_gsymbol *s; | |
32e8bb8e | 4772 | enum gfc_symbol_type type; |
68ea355b PT |
4773 | |
4774 | s = gfc_get_gsymbol(name); | |
7389bce6 | 4775 | type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; |
68ea355b PT |
4776 | |
4777 | if (s->defined | |
636dff67 | 4778 | || (s->type != GSYM_UNKNOWN |
7389bce6 | 4779 | && s->type != type)) |
ca39e6f2 | 4780 | gfc_global_used(s, NULL); |
68ea355b PT |
4781 | else |
4782 | { | |
7389bce6 | 4783 | s->type = type; |
68ea355b PT |
4784 | s->where = gfc_current_locus; |
4785 | s->defined = 1; | |
71a7778c | 4786 | s->ns = gfc_current_ns; |
68ea355b PT |
4787 | return true; |
4788 | } | |
4789 | return false; | |
4790 | } | |
6de9cd9a | 4791 | |
636dff67 | 4792 | |
6de9cd9a DN |
4793 | /* Match an ENTRY statement. */ |
4794 | ||
4795 | match | |
4796 | gfc_match_entry (void) | |
4797 | { | |
3d79abbd PB |
4798 | gfc_symbol *proc; |
4799 | gfc_symbol *result; | |
4800 | gfc_symbol *entry; | |
6de9cd9a DN |
4801 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
4802 | gfc_compile_state state; | |
4803 | match m; | |
3d79abbd | 4804 | gfc_entry_list *el; |
c96cfa49 | 4805 | locus old_loc; |
1a492601 | 4806 | bool module_procedure; |
bc3e7a8c TB |
4807 | char peek_char; |
4808 | match is_bind_c; | |
6de9cd9a DN |
4809 | |
4810 | m = gfc_match_name (name); | |
4811 | if (m != MATCH_YES) | |
4812 | return m; | |
4813 | ||
3d79abbd | 4814 | state = gfc_current_state (); |
4c93c95a | 4815 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
3d79abbd | 4816 | { |
4c93c95a FXC |
4817 | switch (state) |
4818 | { | |
4819 | case COMP_PROGRAM: | |
4820 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
4821 | break; | |
4822 | case COMP_MODULE: | |
4823 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
4824 | break; | |
4825 | case COMP_BLOCK_DATA: | |
636dff67 SK |
4826 | gfc_error ("ENTRY statement at %C cannot appear within " |
4827 | "a BLOCK DATA"); | |
4c93c95a FXC |
4828 | break; |
4829 | case COMP_INTERFACE: | |
636dff67 SK |
4830 | gfc_error ("ENTRY statement at %C cannot appear within " |
4831 | "an INTERFACE"); | |
4c93c95a FXC |
4832 | break; |
4833 | case COMP_DERIVED: | |
636dff67 SK |
4834 | gfc_error ("ENTRY statement at %C cannot appear within " |
4835 | "a DERIVED TYPE block"); | |
4c93c95a FXC |
4836 | break; |
4837 | case COMP_IF: | |
636dff67 SK |
4838 | gfc_error ("ENTRY statement at %C cannot appear within " |
4839 | "an IF-THEN block"); | |
4c93c95a FXC |
4840 | break; |
4841 | case COMP_DO: | |
636dff67 SK |
4842 | gfc_error ("ENTRY statement at %C cannot appear within " |
4843 | "a DO block"); | |
4c93c95a FXC |
4844 | break; |
4845 | case COMP_SELECT: | |
636dff67 SK |
4846 | gfc_error ("ENTRY statement at %C cannot appear within " |
4847 | "a SELECT block"); | |
4c93c95a FXC |
4848 | break; |
4849 | case COMP_FORALL: | |
636dff67 SK |
4850 | gfc_error ("ENTRY statement at %C cannot appear within " |
4851 | "a FORALL block"); | |
4c93c95a FXC |
4852 | break; |
4853 | case COMP_WHERE: | |
636dff67 SK |
4854 | gfc_error ("ENTRY statement at %C cannot appear within " |
4855 | "a WHERE block"); | |
4c93c95a FXC |
4856 | break; |
4857 | case COMP_CONTAINS: | |
636dff67 SK |
4858 | gfc_error ("ENTRY statement at %C cannot appear within " |
4859 | "a contained subprogram"); | |
4c93c95a FXC |
4860 | break; |
4861 | default: | |
4862 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
4863 | } | |
3d79abbd PB |
4864 | return MATCH_ERROR; |
4865 | } | |
4866 | ||
1a492601 | 4867 | module_procedure = gfc_current_ns->parent != NULL |
636dff67 SK |
4868 | && gfc_current_ns->parent->proc_name |
4869 | && gfc_current_ns->parent->proc_name->attr.flavor | |
4870 | == FL_MODULE; | |
1a492601 | 4871 | |
3d79abbd PB |
4872 | if (gfc_current_ns->parent != NULL |
4873 | && gfc_current_ns->parent->proc_name | |
1a492601 | 4874 | && !module_procedure) |
3d79abbd PB |
4875 | { |
4876 | gfc_error("ENTRY statement at %C cannot appear in a " | |
4877 | "contained procedure"); | |
4878 | return MATCH_ERROR; | |
4879 | } | |
4880 | ||
1a492601 PT |
4881 | /* Module function entries need special care in get_proc_name |
4882 | because previous references within the function will have | |
4883 | created symbols attached to the current namespace. */ | |
4884 | if (get_proc_name (name, &entry, | |
4885 | gfc_current_ns->parent != NULL | |
ecd3b73c | 4886 | && module_procedure)) |
6de9cd9a DN |
4887 | return MATCH_ERROR; |
4888 | ||
3d79abbd PB |
4889 | proc = gfc_current_block (); |
4890 | ||
bc3e7a8c TB |
4891 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
4892 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4893 | not allowed for procedures. */ | |
4894 | if (entry->attr.is_bind_c == 1) | |
4895 | { | |
4896 | entry->attr.is_bind_c = 0; | |
4897 | if (entry->old_symbol != NULL) | |
4898 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4899 | "variables or common blocks", | |
4900 | &(entry->old_symbol->declared_at)); | |
4901 | else | |
4902 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4903 | "variables or common blocks", &gfc_current_locus); | |
4904 | } | |
4905 | ||
4906 | /* Check what next non-whitespace character is so we can tell if there | |
4907 | is the required parens if we have a BIND(C). */ | |
4908 | gfc_gobble_whitespace (); | |
8fc541d3 | 4909 | peek_char = gfc_peek_ascii_char (); |
bc3e7a8c | 4910 | |
3d79abbd | 4911 | if (state == COMP_SUBROUTINE) |
6de9cd9a | 4912 | { |
231b2fcc | 4913 | /* An entry in a subroutine. */ |
182393f4 | 4914 | if (!gfc_current_ns->parent && !add_global_entry (name, 1)) |
68ea355b PT |
4915 | return MATCH_ERROR; |
4916 | ||
6de9cd9a DN |
4917 | m = gfc_match_formal_arglist (entry, 0, 1); |
4918 | if (m != MATCH_YES) | |
4919 | return MATCH_ERROR; | |
4920 | ||
1eabf70a TB |
4921 | /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can |
4922 | never be an internal procedure. */ | |
4923 | is_bind_c = gfc_match_bind_c (entry, true); | |
bc3e7a8c TB |
4924 | if (is_bind_c == MATCH_ERROR) |
4925 | return MATCH_ERROR; | |
4926 | if (is_bind_c == MATCH_YES) | |
4927 | { | |
4928 | if (peek_char != '(') | |
4929 | { | |
4930 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
4931 | return MATCH_ERROR; | |
4932 | } | |
4933 | if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1) | |
4934 | == FAILURE) | |
4935 | return MATCH_ERROR; | |
4936 | } | |
4937 | ||
231b2fcc TS |
4938 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4939 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a | 4940 | return MATCH_ERROR; |
3d79abbd PB |
4941 | } |
4942 | else | |
4943 | { | |
c96cfa49 | 4944 | /* An entry in a function. |
636dff67 SK |
4945 | We need to take special care because writing |
4946 | ENTRY f() | |
4947 | as | |
4948 | ENTRY f | |
4949 | is allowed, whereas | |
4950 | ENTRY f() RESULT (r) | |
4951 | can't be written as | |
4952 | ENTRY f RESULT (r). */ | |
182393f4 | 4953 | if (!gfc_current_ns->parent && !add_global_entry (name, 0)) |
68ea355b PT |
4954 | return MATCH_ERROR; |
4955 | ||
c96cfa49 TS |
4956 | old_loc = gfc_current_locus; |
4957 | if (gfc_match_eos () == MATCH_YES) | |
4958 | { | |
4959 | gfc_current_locus = old_loc; | |
4960 | /* Match the empty argument list, and add the interface to | |
4961 | the symbol. */ | |
4962 | m = gfc_match_formal_arglist (entry, 0, 1); | |
4963 | } | |
4964 | else | |
4965 | m = gfc_match_formal_arglist (entry, 0, 0); | |
4966 | ||
6de9cd9a DN |
4967 | if (m != MATCH_YES) |
4968 | return MATCH_ERROR; | |
4969 | ||
6de9cd9a DN |
4970 | result = NULL; |
4971 | ||
4972 | if (gfc_match_eos () == MATCH_YES) | |
4973 | { | |
231b2fcc TS |
4974 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4975 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a DN |
4976 | return MATCH_ERROR; |
4977 | ||
d198b59a | 4978 | entry->result = entry; |
6de9cd9a DN |
4979 | } |
4980 | else | |
4981 | { | |
bc3e7a8c | 4982 | m = gfc_match_suffix (entry, &result); |
6de9cd9a DN |
4983 | if (m == MATCH_NO) |
4984 | gfc_syntax_error (ST_ENTRY); | |
4985 | if (m != MATCH_YES) | |
4986 | return MATCH_ERROR; | |
4987 | ||
bc3e7a8c TB |
4988 | if (result) |
4989 | { | |
4990 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE | |
4991 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
4992 | || gfc_add_function (&entry->attr, result->name, NULL) | |
4993 | == FAILURE) | |
4994 | return MATCH_ERROR; | |
4995 | entry->result = result; | |
4996 | } | |
4997 | else | |
4998 | { | |
4999 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE | |
5000 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
5001 | return MATCH_ERROR; | |
5002 | entry->result = entry; | |
5003 | } | |
6de9cd9a | 5004 | } |
6de9cd9a DN |
5005 | } |
5006 | ||
5007 | if (gfc_match_eos () != MATCH_YES) | |
5008 | { | |
5009 | gfc_syntax_error (ST_ENTRY); | |
5010 | return MATCH_ERROR; | |
5011 | } | |
5012 | ||
3d79abbd PB |
5013 | entry->attr.recursive = proc->attr.recursive; |
5014 | entry->attr.elemental = proc->attr.elemental; | |
5015 | entry->attr.pure = proc->attr.pure; | |
6de9cd9a | 5016 | |
3d79abbd PB |
5017 | el = gfc_get_entry_list (); |
5018 | el->sym = entry; | |
5019 | el->next = gfc_current_ns->entries; | |
5020 | gfc_current_ns->entries = el; | |
5021 | if (el->next) | |
5022 | el->id = el->next->id + 1; | |
5023 | else | |
5024 | el->id = 1; | |
6de9cd9a | 5025 | |
3d79abbd PB |
5026 | new_st.op = EXEC_ENTRY; |
5027 | new_st.ext.entry = el; | |
5028 | ||
5029 | return MATCH_YES; | |
6de9cd9a DN |
5030 | } |
5031 | ||
5032 | ||
5033 | /* Match a subroutine statement, including optional prefixes. */ | |
5034 | ||
5035 | match | |
5036 | gfc_match_subroutine (void) | |
5037 | { | |
5038 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5039 | gfc_symbol *sym; | |
5040 | match m; | |
a8b3b0b6 CR |
5041 | match is_bind_c; |
5042 | char peek_char; | |
1eabf70a | 5043 | bool allow_binding_name; |
6de9cd9a DN |
5044 | |
5045 | if (gfc_current_state () != COMP_NONE | |
5046 | && gfc_current_state () != COMP_INTERFACE | |
5047 | && gfc_current_state () != COMP_CONTAINS) | |
5048 | return MATCH_NO; | |
5049 | ||
1c8bcdf7 | 5050 | m = gfc_match_prefix (NULL); |
6de9cd9a DN |
5051 | if (m != MATCH_YES) |
5052 | return m; | |
5053 | ||
5054 | m = gfc_match ("subroutine% %n", name); | |
5055 | if (m != MATCH_YES) | |
5056 | return m; | |
5057 | ||
1a492601 | 5058 | if (get_proc_name (name, &sym, false)) |
6de9cd9a | 5059 | return MATCH_ERROR; |
3070bab4 JW |
5060 | |
5061 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
5062 | sym = sym->result; | |
5063 | ||
6de9cd9a DN |
5064 | gfc_new_block = sym; |
5065 | ||
a8b3b0b6 | 5066 | /* Check what next non-whitespace character is so we can tell if there |
bc3e7a8c | 5067 | is the required parens if we have a BIND(C). */ |
a8b3b0b6 | 5068 | gfc_gobble_whitespace (); |
8fc541d3 | 5069 | peek_char = gfc_peek_ascii_char (); |
a8b3b0b6 | 5070 | |
231b2fcc | 5071 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
5072 | return MATCH_ERROR; |
5073 | ||
5074 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
5075 | return MATCH_ERROR; | |
5076 | ||
a8b3b0b6 CR |
5077 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
5078 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
5079 | not allowed for procedures. */ | |
5080 | if (sym->attr.is_bind_c == 1) | |
5081 | { | |
5082 | sym->attr.is_bind_c = 0; | |
5083 | if (sym->old_symbol != NULL) | |
5084 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5085 | "variables or common blocks", | |
5086 | &(sym->old_symbol->declared_at)); | |
5087 | else | |
5088 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5089 | "variables or common blocks", &gfc_current_locus); | |
5090 | } | |
1eabf70a TB |
5091 | |
5092 | /* C binding names are not allowed for internal procedures. */ | |
5093 | if (gfc_current_state () == COMP_CONTAINS | |
5094 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
5095 | allow_binding_name = false; | |
5096 | else | |
5097 | allow_binding_name = true; | |
5098 | ||
a8b3b0b6 CR |
5099 | /* Here, we are just checking if it has the bind(c) attribute, and if |
5100 | so, then we need to make sure it's all correct. If it doesn't, | |
5101 | we still need to continue matching the rest of the subroutine line. */ | |
1eabf70a | 5102 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
a8b3b0b6 CR |
5103 | if (is_bind_c == MATCH_ERROR) |
5104 | { | |
5105 | /* There was an attempt at the bind(c), but it was wrong. An | |
5106 | error message should have been printed w/in the gfc_match_bind_c | |
5107 | so here we'll just return the MATCH_ERROR. */ | |
5108 | return MATCH_ERROR; | |
5109 | } | |
5110 | ||
5111 | if (is_bind_c == MATCH_YES) | |
5112 | { | |
1eabf70a | 5113 | /* The following is allowed in the Fortran 2008 draft. */ |
01f4fff1 | 5114 | if (gfc_current_state () == COMP_CONTAINS |
1eabf70a | 5115 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
fdc54e88 FXC |
5116 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
5117 | "at %L may not be specified for an internal " | |
5118 | "procedure", &gfc_current_locus) | |
1eabf70a TB |
5119 | == FAILURE) |
5120 | return MATCH_ERROR; | |
5121 | ||
a8b3b0b6 CR |
5122 | if (peek_char != '(') |
5123 | { | |
5124 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
5125 | return MATCH_ERROR; | |
5126 | } | |
5127 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) | |
5128 | == FAILURE) | |
5129 | return MATCH_ERROR; | |
5130 | } | |
5131 | ||
6de9cd9a DN |
5132 | if (gfc_match_eos () != MATCH_YES) |
5133 | { | |
5134 | gfc_syntax_error (ST_SUBROUTINE); | |
5135 | return MATCH_ERROR; | |
5136 | } | |
5137 | ||
5138 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
5139 | return MATCH_ERROR; | |
5140 | ||
c3005b0f DK |
5141 | /* Warn if it has the same name as an intrinsic. */ |
5142 | warn_intrinsic_shadow (sym, false); | |
5143 | ||
6de9cd9a DN |
5144 | return MATCH_YES; |
5145 | } | |
5146 | ||
5147 | ||
a8b3b0b6 CR |
5148 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
5149 | given, and set the binding label in either the given symbol (if not | |
86bf520d | 5150 | NULL), or in the current_ts. The symbol may be NULL because we may |
a8b3b0b6 CR |
5151 | encounter the BIND(C) before the declaration itself. Return |
5152 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, | |
5153 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, | |
5154 | or MATCH_YES if the specifier was correct and the binding label and | |
5155 | bind(c) fields were set correctly for the given symbol or the | |
1eabf70a TB |
5156 | current_ts. If allow_binding_name is false, no binding name may be |
5157 | given. */ | |
a8b3b0b6 CR |
5158 | |
5159 | match | |
1eabf70a | 5160 | gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name) |
a8b3b0b6 CR |
5161 | { |
5162 | /* binding label, if exists */ | |
5163 | char binding_label[GFC_MAX_SYMBOL_LEN + 1]; | |
5164 | match double_quote; | |
5165 | match single_quote; | |
a8b3b0b6 CR |
5166 | |
5167 | /* Initialize the flag that specifies whether we encountered a NAME= | |
5168 | specifier or not. */ | |
5169 | has_name_equals = 0; | |
5170 | ||
5171 | /* Init the first char to nil so we can catch if we don't have | |
5172 | the label (name attr) or the symbol name yet. */ | |
5173 | binding_label[0] = '\0'; | |
5174 | ||
5175 | /* This much we have to be able to match, in this order, if | |
5176 | there is a bind(c) label. */ | |
5177 | if (gfc_match (" bind ( c ") != MATCH_YES) | |
5178 | return MATCH_NO; | |
5179 | ||
5180 | /* Now see if there is a binding label, or if we've reached the | |
5181 | end of the bind(c) attribute without one. */ | |
5182 | if (gfc_match_char (',') == MATCH_YES) | |
5183 | { | |
5184 | if (gfc_match (" name = ") != MATCH_YES) | |
5185 | { | |
5186 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5187 | "at %C"); | |
5188 | /* should give an error message here */ | |
5189 | return MATCH_ERROR; | |
5190 | } | |
5191 | ||
5192 | has_name_equals = 1; | |
5193 | ||
5194 | /* Get the opening quote. */ | |
5195 | double_quote = MATCH_YES; | |
5196 | single_quote = MATCH_YES; | |
5197 | double_quote = gfc_match_char ('"'); | |
5198 | if (double_quote != MATCH_YES) | |
5199 | single_quote = gfc_match_char ('\''); | |
5200 | if (double_quote != MATCH_YES && single_quote != MATCH_YES) | |
5201 | { | |
5202 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5203 | "at %C"); | |
5204 | return MATCH_ERROR; | |
5205 | } | |
5206 | ||
5207 | /* Grab the binding label, using functions that will not lower | |
5208 | case the names automatically. */ | |
5209 | if (gfc_match_name_C (binding_label) != MATCH_YES) | |
5210 | return MATCH_ERROR; | |
5211 | ||
5212 | /* Get the closing quotation. */ | |
5213 | if (double_quote == MATCH_YES) | |
5214 | { | |
5215 | if (gfc_match_char ('"') != MATCH_YES) | |
5216 | { | |
5217 | gfc_error ("Missing closing quote '\"' for binding label at %C"); | |
5218 | /* User started string with '"' so looked to match it. */ | |
5219 | return MATCH_ERROR; | |
5220 | } | |
5221 | } | |
5222 | else | |
5223 | { | |
5224 | if (gfc_match_char ('\'') != MATCH_YES) | |
5225 | { | |
5226 | gfc_error ("Missing closing quote '\'' for binding label at %C"); | |
5227 | /* User started string with "'" char. */ | |
5228 | return MATCH_ERROR; | |
5229 | } | |
5230 | } | |
5231 | } | |
5232 | ||
5233 | /* Get the required right paren. */ | |
5234 | if (gfc_match_char (')') != MATCH_YES) | |
5235 | { | |
5236 | gfc_error ("Missing closing paren for binding label at %C"); | |
5237 | return MATCH_ERROR; | |
5238 | } | |
5239 | ||
1eabf70a TB |
5240 | if (has_name_equals && !allow_binding_name) |
5241 | { | |
5242 | gfc_error ("No binding name is allowed in BIND(C) at %C"); | |
5243 | return MATCH_ERROR; | |
5244 | } | |
5245 | ||
5246 | if (has_name_equals && sym != NULL && sym->attr.dummy) | |
5247 | { | |
5248 | gfc_error ("For dummy procedure %s, no binding name is " | |
5249 | "allowed in BIND(C) at %C", sym->name); | |
5250 | return MATCH_ERROR; | |
5251 | } | |
5252 | ||
5253 | ||
a8b3b0b6 CR |
5254 | /* Save the binding label to the symbol. If sym is null, we're |
5255 | probably matching the typespec attributes of a declaration and | |
5256 | haven't gotten the name yet, and therefore, no symbol yet. */ | |
5257 | if (binding_label[0] != '\0') | |
5258 | { | |
5259 | if (sym != NULL) | |
5260 | { | |
c5b5a17a | 5261 | strcpy (sym->binding_label, binding_label); |
a8b3b0b6 CR |
5262 | } |
5263 | else | |
c5b5a17a | 5264 | strcpy (curr_binding_label, binding_label); |
a8b3b0b6 | 5265 | } |
1eabf70a | 5266 | else if (allow_binding_name) |
a8b3b0b6 CR |
5267 | { |
5268 | /* No binding label, but if symbol isn't null, we | |
1eabf70a TB |
5269 | can set the label for it here. |
5270 | If name="" or allow_binding_name is false, no C binding name is | |
5271 | created. */ | |
a8b3b0b6 CR |
5272 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) |
5273 | strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1); | |
5274 | } | |
9e1d712c | 5275 | |
129d15a3 JW |
5276 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
5277 | && current_interface.type == INTERFACE_ABSTRACT) | |
9e1d712c TB |
5278 | { |
5279 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); | |
5280 | return MATCH_ERROR; | |
5281 | } | |
5282 | ||
a8b3b0b6 CR |
5283 | return MATCH_YES; |
5284 | } | |
5285 | ||
5286 | ||
1f2959f0 | 5287 | /* Return nonzero if we're currently compiling a contained procedure. */ |
ddc9ce91 TS |
5288 | |
5289 | static int | |
5290 | contained_procedure (void) | |
5291 | { | |
083de129 | 5292 | gfc_state_data *s = gfc_state_stack; |
ddc9ce91 | 5293 | |
083de129 TB |
5294 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) |
5295 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) | |
5296 | return 1; | |
ddc9ce91 TS |
5297 | |
5298 | return 0; | |
5299 | } | |
5300 | ||
d51347f9 | 5301 | /* Set the kind of each enumerator. The kind is selected such that it is |
25d8f0a2 TS |
5302 | interoperable with the corresponding C enumeration type, making |
5303 | sure that -fshort-enums is honored. */ | |
5304 | ||
5305 | static void | |
5306 | set_enum_kind(void) | |
5307 | { | |
5308 | enumerator_history *current_history = NULL; | |
5309 | int kind; | |
5310 | int i; | |
5311 | ||
5312 | if (max_enum == NULL || enum_history == NULL) | |
5313 | return; | |
5314 | ||
cab129d1 | 5315 | if (!flag_short_enums) |
d51347f9 TB |
5316 | return; |
5317 | ||
25d8f0a2 TS |
5318 | i = 0; |
5319 | do | |
5320 | { | |
5321 | kind = gfc_integer_kinds[i++].kind; | |
5322 | } | |
d51347f9 | 5323 | while (kind < gfc_c_int_kind |
25d8f0a2 TS |
5324 | && gfc_check_integer_range (max_enum->initializer->value.integer, |
5325 | kind) != ARITH_OK); | |
5326 | ||
5327 | current_history = enum_history; | |
5328 | while (current_history != NULL) | |
5329 | { | |
5330 | current_history->sym->ts.kind = kind; | |
5331 | current_history = current_history->next; | |
5332 | } | |
5333 | } | |
5334 | ||
636dff67 | 5335 | |
6de9cd9a DN |
5336 | /* Match any of the various end-block statements. Returns the type of |
5337 | END to the caller. The END INTERFACE, END IF, END DO and END | |
5338 | SELECT statements cannot be replaced by a single END statement. */ | |
5339 | ||
5340 | match | |
636dff67 | 5341 | gfc_match_end (gfc_statement *st) |
6de9cd9a DN |
5342 | { |
5343 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5344 | gfc_compile_state state; | |
5345 | locus old_loc; | |
5346 | const char *block_name; | |
5347 | const char *target; | |
ddc9ce91 | 5348 | int eos_ok; |
6de9cd9a DN |
5349 | match m; |
5350 | ||
63645982 | 5351 | old_loc = gfc_current_locus; |
6de9cd9a DN |
5352 | if (gfc_match ("end") != MATCH_YES) |
5353 | return MATCH_NO; | |
5354 | ||
5355 | state = gfc_current_state (); | |
636dff67 SK |
5356 | block_name = gfc_current_block () == NULL |
5357 | ? NULL : gfc_current_block ()->name; | |
6de9cd9a | 5358 | |
30b608eb | 5359 | if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS) |
6de9cd9a DN |
5360 | { |
5361 | state = gfc_state_stack->previous->state; | |
636dff67 SK |
5362 | block_name = gfc_state_stack->previous->sym == NULL |
5363 | ? NULL : gfc_state_stack->previous->sym->name; | |
6de9cd9a DN |
5364 | } |
5365 | ||
5366 | switch (state) | |
5367 | { | |
5368 | case COMP_NONE: | |
5369 | case COMP_PROGRAM: | |
5370 | *st = ST_END_PROGRAM; | |
5371 | target = " program"; | |
ddc9ce91 | 5372 | eos_ok = 1; |
6de9cd9a DN |
5373 | break; |
5374 | ||
5375 | case COMP_SUBROUTINE: | |
5376 | *st = ST_END_SUBROUTINE; | |
5377 | target = " subroutine"; | |
ddc9ce91 | 5378 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
5379 | break; |
5380 | ||
5381 | case COMP_FUNCTION: | |
5382 | *st = ST_END_FUNCTION; | |
5383 | target = " function"; | |
ddc9ce91 | 5384 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
5385 | break; |
5386 | ||
5387 | case COMP_BLOCK_DATA: | |
5388 | *st = ST_END_BLOCK_DATA; | |
5389 | target = " block data"; | |
ddc9ce91 | 5390 | eos_ok = 1; |
6de9cd9a DN |
5391 | break; |
5392 | ||
5393 | case COMP_MODULE: | |
5394 | *st = ST_END_MODULE; | |
5395 | target = " module"; | |
ddc9ce91 | 5396 | eos_ok = 1; |
6de9cd9a DN |
5397 | break; |
5398 | ||
5399 | case COMP_INTERFACE: | |
5400 | *st = ST_END_INTERFACE; | |
5401 | target = " interface"; | |
ddc9ce91 | 5402 | eos_ok = 0; |
6de9cd9a DN |
5403 | break; |
5404 | ||
5405 | case COMP_DERIVED: | |
30b608eb | 5406 | case COMP_DERIVED_CONTAINS: |
6de9cd9a DN |
5407 | *st = ST_END_TYPE; |
5408 | target = " type"; | |
ddc9ce91 | 5409 | eos_ok = 0; |
6de9cd9a DN |
5410 | break; |
5411 | ||
5412 | case COMP_IF: | |
5413 | *st = ST_ENDIF; | |
5414 | target = " if"; | |
ddc9ce91 | 5415 | eos_ok = 0; |
6de9cd9a DN |
5416 | break; |
5417 | ||
5418 | case COMP_DO: | |
5419 | *st = ST_ENDDO; | |
5420 | target = " do"; | |
ddc9ce91 | 5421 | eos_ok = 0; |
6de9cd9a DN |
5422 | break; |
5423 | ||
5424 | case COMP_SELECT: | |
5425 | *st = ST_END_SELECT; | |
5426 | target = " select"; | |
ddc9ce91 | 5427 | eos_ok = 0; |
6de9cd9a DN |
5428 | break; |
5429 | ||
5430 | case COMP_FORALL: | |
5431 | *st = ST_END_FORALL; | |
5432 | target = " forall"; | |
ddc9ce91 | 5433 | eos_ok = 0; |
6de9cd9a DN |
5434 | break; |
5435 | ||
5436 | case COMP_WHERE: | |
5437 | *st = ST_END_WHERE; | |
5438 | target = " where"; | |
ddc9ce91 | 5439 | eos_ok = 0; |
6de9cd9a DN |
5440 | break; |
5441 | ||
25d8f0a2 TS |
5442 | case COMP_ENUM: |
5443 | *st = ST_END_ENUM; | |
5444 | target = " enum"; | |
5445 | eos_ok = 0; | |
5446 | last_initializer = NULL; | |
5447 | set_enum_kind (); | |
5448 | gfc_free_enum_history (); | |
5449 | break; | |
5450 | ||
6de9cd9a DN |
5451 | default: |
5452 | gfc_error ("Unexpected END statement at %C"); | |
5453 | goto cleanup; | |
5454 | } | |
5455 | ||
5456 | if (gfc_match_eos () == MATCH_YES) | |
5457 | { | |
ddc9ce91 | 5458 | if (!eos_ok) |
6de9cd9a | 5459 | { |
66e4ab31 | 5460 | /* We would have required END [something]. */ |
59ce85b5 TS |
5461 | gfc_error ("%s statement expected at %L", |
5462 | gfc_ascii_statement (*st), &old_loc); | |
6de9cd9a DN |
5463 | goto cleanup; |
5464 | } | |
5465 | ||
5466 | return MATCH_YES; | |
5467 | } | |
5468 | ||
5469 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
5470 | if (gfc_match (target) != MATCH_YES) | |
5471 | { | |
5472 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
5473 | goto cleanup; | |
5474 | } | |
5475 | ||
5476 | /* If we're at the end, make sure a block name wasn't required. */ | |
5477 | if (gfc_match_eos () == MATCH_YES) | |
5478 | { | |
5479 | ||
690af379 TS |
5480 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT |
5481 | && *st != ST_END_FORALL && *st != ST_END_WHERE) | |
6de9cd9a DN |
5482 | return MATCH_YES; |
5483 | ||
5484 | if (gfc_current_block () == NULL) | |
5485 | return MATCH_YES; | |
5486 | ||
5487 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
5488 | block_name, gfc_ascii_statement (*st)); | |
5489 | ||
5490 | return MATCH_ERROR; | |
5491 | } | |
5492 | ||
5493 | /* END INTERFACE has a special handler for its several possible endings. */ | |
5494 | if (*st == ST_END_INTERFACE) | |
5495 | return gfc_match_end_interface (); | |
5496 | ||
66e4ab31 SK |
5497 | /* We haven't hit the end of statement, so what is left must be an |
5498 | end-name. */ | |
6de9cd9a DN |
5499 | m = gfc_match_space (); |
5500 | if (m == MATCH_YES) | |
5501 | m = gfc_match_name (name); | |
5502 | ||
5503 | if (m == MATCH_NO) | |
5504 | gfc_error ("Expected terminating name at %C"); | |
5505 | if (m != MATCH_YES) | |
5506 | goto cleanup; | |
5507 | ||
5508 | if (block_name == NULL) | |
5509 | goto syntax; | |
5510 | ||
3070bab4 | 5511 | if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0) |
6de9cd9a DN |
5512 | { |
5513 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
5514 | gfc_ascii_statement (*st)); | |
5515 | goto cleanup; | |
5516 | } | |
3070bab4 JW |
5517 | /* Procedure pointer as function result. */ |
5518 | else if (strcmp (block_name, "ppr@") == 0 | |
5519 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0) | |
5520 | { | |
5521 | gfc_error ("Expected label '%s' for %s statement at %C", | |
5522 | gfc_current_block ()->ns->proc_name->name, | |
5523 | gfc_ascii_statement (*st)); | |
5524 | goto cleanup; | |
5525 | } | |
6de9cd9a DN |
5526 | |
5527 | if (gfc_match_eos () == MATCH_YES) | |
5528 | return MATCH_YES; | |
5529 | ||
5530 | syntax: | |
5531 | gfc_syntax_error (*st); | |
5532 | ||
5533 | cleanup: | |
63645982 | 5534 | gfc_current_locus = old_loc; |
6de9cd9a DN |
5535 | return MATCH_ERROR; |
5536 | } | |
5537 | ||
5538 | ||
5539 | ||
5540 | /***************** Attribute declaration statements ****************/ | |
5541 | ||
5542 | /* Set the attribute of a single variable. */ | |
5543 | ||
5544 | static match | |
5545 | attr_decl1 (void) | |
5546 | { | |
5547 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5548 | gfc_array_spec *as; | |
5549 | gfc_symbol *sym; | |
5550 | locus var_locus; | |
5551 | match m; | |
5552 | ||
5553 | as = NULL; | |
5554 | ||
5555 | m = gfc_match_name (name); | |
5556 | if (m != MATCH_YES) | |
5557 | goto cleanup; | |
5558 | ||
08a6b8e0 | 5559 | if (find_special (name, &sym, false)) |
6de9cd9a DN |
5560 | return MATCH_ERROR; |
5561 | ||
63645982 | 5562 | var_locus = gfc_current_locus; |
6de9cd9a DN |
5563 | |
5564 | /* Deal with possible array specification for certain attributes. */ | |
5565 | if (current_attr.dimension | |
5566 | || current_attr.allocatable | |
5567 | || current_attr.pointer | |
5568 | || current_attr.target) | |
5569 | { | |
5570 | m = gfc_match_array_spec (&as); | |
5571 | if (m == MATCH_ERROR) | |
5572 | goto cleanup; | |
5573 | ||
5574 | if (current_attr.dimension && m == MATCH_NO) | |
5575 | { | |
636dff67 SK |
5576 | gfc_error ("Missing array specification at %L in DIMENSION " |
5577 | "statement", &var_locus); | |
6de9cd9a DN |
5578 | m = MATCH_ERROR; |
5579 | goto cleanup; | |
5580 | } | |
5581 | ||
1283ab12 TB |
5582 | if (current_attr.dimension && sym->value) |
5583 | { | |
5584 | gfc_error ("Dimensions specified for %s at %L after its " | |
5585 | "initialisation", sym->name, &var_locus); | |
5586 | m = MATCH_ERROR; | |
5587 | goto cleanup; | |
5588 | } | |
5589 | ||
6de9cd9a DN |
5590 | if ((current_attr.allocatable || current_attr.pointer) |
5591 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
5592 | { | |
636dff67 | 5593 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
6de9cd9a DN |
5594 | m = MATCH_ERROR; |
5595 | goto cleanup; | |
5596 | } | |
5597 | } | |
5598 | ||
636dff67 SK |
5599 | /* Update symbol table. DIMENSION attribute is set |
5600 | in gfc_set_array_spec(). */ | |
6de9cd9a | 5601 | if (current_attr.dimension == 0 |
e62532af | 5602 | && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE) |
6de9cd9a DN |
5603 | { |
5604 | m = MATCH_ERROR; | |
5605 | goto cleanup; | |
5606 | } | |
5607 | ||
5608 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
5609 | { | |
5610 | m = MATCH_ERROR; | |
5611 | goto cleanup; | |
5612 | } | |
d51347f9 | 5613 | |
83d890b9 AL |
5614 | if (sym->attr.cray_pointee && sym->as != NULL) |
5615 | { | |
5616 | /* Fix the array spec. */ | |
5617 | m = gfc_mod_pointee_as (sym->as); | |
5618 | if (m == MATCH_ERROR) | |
5619 | goto cleanup; | |
5620 | } | |
6de9cd9a | 5621 | |
7114edca | 5622 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
1902704e PT |
5623 | { |
5624 | m = MATCH_ERROR; | |
5625 | goto cleanup; | |
5626 | } | |
5627 | ||
6de9cd9a DN |
5628 | if ((current_attr.external || current_attr.intrinsic) |
5629 | && sym->attr.flavor != FL_PROCEDURE | |
231b2fcc | 5630 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
5631 | { |
5632 | m = MATCH_ERROR; | |
5633 | goto cleanup; | |
5634 | } | |
5635 | ||
3070bab4 JW |
5636 | add_hidden_procptr_result (sym); |
5637 | ||
6de9cd9a DN |
5638 | return MATCH_YES; |
5639 | ||
5640 | cleanup: | |
5641 | gfc_free_array_spec (as); | |
5642 | return m; | |
5643 | } | |
5644 | ||
5645 | ||
5646 | /* Generic attribute declaration subroutine. Used for attributes that | |
5647 | just have a list of names. */ | |
5648 | ||
5649 | static match | |
5650 | attr_decl (void) | |
5651 | { | |
5652 | match m; | |
5653 | ||
5654 | /* Gobble the optional double colon, by simply ignoring the result | |
5655 | of gfc_match(). */ | |
5656 | gfc_match (" ::"); | |
5657 | ||
5658 | for (;;) | |
5659 | { | |
5660 | m = attr_decl1 (); | |
5661 | if (m != MATCH_YES) | |
5662 | break; | |
5663 | ||
5664 | if (gfc_match_eos () == MATCH_YES) | |
5665 | { | |
5666 | m = MATCH_YES; | |
5667 | break; | |
5668 | } | |
5669 | ||
5670 | if (gfc_match_char (',') != MATCH_YES) | |
5671 | { | |
5672 | gfc_error ("Unexpected character in variable list at %C"); | |
5673 | m = MATCH_ERROR; | |
5674 | break; | |
5675 | } | |
5676 | } | |
5677 | ||
5678 | return m; | |
5679 | } | |
5680 | ||
5681 | ||
83d890b9 AL |
5682 | /* This routine matches Cray Pointer declarations of the form: |
5683 | pointer ( <pointer>, <pointee> ) | |
5684 | or | |
d51347f9 TB |
5685 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
5686 | The pointer, if already declared, should be an integer. Otherwise, we | |
83d890b9 AL |
5687 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
5688 | be either a scalar, or an array declaration. No space is allocated for | |
d51347f9 | 5689 | the pointee. For the statement |
83d890b9 AL |
5690 | pointer (ipt, ar(10)) |
5691 | any subsequent uses of ar will be translated (in C-notation) as | |
d51347f9 | 5692 | ar(i) => ((<type> *) ipt)(i) |
b122dc6a | 5693 | After gimplification, pointee variable will disappear in the code. */ |
83d890b9 AL |
5694 | |
5695 | static match | |
5696 | cray_pointer_decl (void) | |
5697 | { | |
5698 | match m; | |
5699 | gfc_array_spec *as; | |
5700 | gfc_symbol *cptr; /* Pointer symbol. */ | |
5701 | gfc_symbol *cpte; /* Pointee symbol. */ | |
5702 | locus var_locus; | |
5703 | bool done = false; | |
5704 | ||
5705 | while (!done) | |
5706 | { | |
5707 | if (gfc_match_char ('(') != MATCH_YES) | |
5708 | { | |
5709 | gfc_error ("Expected '(' at %C"); | |
d51347f9 | 5710 | return MATCH_ERROR; |
83d890b9 | 5711 | } |
d51347f9 | 5712 | |
83d890b9 AL |
5713 | /* Match pointer. */ |
5714 | var_locus = gfc_current_locus; | |
5715 | gfc_clear_attr (¤t_attr); | |
5716 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
5717 | current_ts.type = BT_INTEGER; | |
5718 | current_ts.kind = gfc_index_integer_kind; | |
5719 | ||
d51347f9 | 5720 | m = gfc_match_symbol (&cptr, 0); |
83d890b9 AL |
5721 | if (m != MATCH_YES) |
5722 | { | |
5723 | gfc_error ("Expected variable name at %C"); | |
5724 | return m; | |
5725 | } | |
d51347f9 | 5726 | |
83d890b9 AL |
5727 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) |
5728 | return MATCH_ERROR; | |
5729 | ||
d51347f9 | 5730 | gfc_set_sym_referenced (cptr); |
83d890b9 AL |
5731 | |
5732 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
5733 | { | |
5734 | cptr->ts.type = BT_INTEGER; | |
d51347f9 | 5735 | cptr->ts.kind = gfc_index_integer_kind; |
83d890b9 AL |
5736 | } |
5737 | else if (cptr->ts.type != BT_INTEGER) | |
5738 | { | |
e25a0da3 | 5739 | gfc_error ("Cray pointer at %C must be an integer"); |
83d890b9 AL |
5740 | return MATCH_ERROR; |
5741 | } | |
5742 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
5743 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
e25a0da3 | 5744 | " memory addresses require %d bytes", |
636dff67 | 5745 | cptr->ts.kind, gfc_index_integer_kind); |
83d890b9 AL |
5746 | |
5747 | if (gfc_match_char (',') != MATCH_YES) | |
5748 | { | |
5749 | gfc_error ("Expected \",\" at %C"); | |
d51347f9 | 5750 | return MATCH_ERROR; |
83d890b9 AL |
5751 | } |
5752 | ||
d51347f9 | 5753 | /* Match Pointee. */ |
83d890b9 AL |
5754 | var_locus = gfc_current_locus; |
5755 | gfc_clear_attr (¤t_attr); | |
5756 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
5757 | current_ts.type = BT_UNKNOWN; | |
5758 | current_ts.kind = 0; | |
5759 | ||
5760 | m = gfc_match_symbol (&cpte, 0); | |
5761 | if (m != MATCH_YES) | |
5762 | { | |
5763 | gfc_error ("Expected variable name at %C"); | |
5764 | return m; | |
5765 | } | |
d51347f9 | 5766 | |
83d890b9 AL |
5767 | /* Check for an optional array spec. */ |
5768 | m = gfc_match_array_spec (&as); | |
5769 | if (m == MATCH_ERROR) | |
5770 | { | |
5771 | gfc_free_array_spec (as); | |
5772 | return m; | |
5773 | } | |
5774 | else if (m == MATCH_NO) | |
5775 | { | |
5776 | gfc_free_array_spec (as); | |
5777 | as = NULL; | |
5778 | } | |
5779 | ||
5780 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
5781 | return MATCH_ERROR; | |
5782 | ||
5783 | gfc_set_sym_referenced (cpte); | |
5784 | ||
5785 | if (cpte->as == NULL) | |
5786 | { | |
5787 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
5788 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
5789 | } | |
5790 | else if (as != NULL) | |
5791 | { | |
e25a0da3 | 5792 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
83d890b9 AL |
5793 | gfc_free_array_spec (as); |
5794 | return MATCH_ERROR; | |
5795 | } | |
5796 | ||
5797 | as = NULL; | |
5798 | ||
5799 | if (cpte->as != NULL) | |
5800 | { | |
5801 | /* Fix array spec. */ | |
5802 | m = gfc_mod_pointee_as (cpte->as); | |
5803 | if (m == MATCH_ERROR) | |
5804 | return m; | |
5805 | } | |
5806 | ||
5807 | /* Point the Pointee at the Pointer. */ | |
b122dc6a | 5808 | cpte->cp_pointer = cptr; |
83d890b9 AL |
5809 | |
5810 | if (gfc_match_char (')') != MATCH_YES) | |
5811 | { | |
5812 | gfc_error ("Expected \")\" at %C"); | |
5813 | return MATCH_ERROR; | |
5814 | } | |
5815 | m = gfc_match_char (','); | |
5816 | if (m != MATCH_YES) | |
5817 | done = true; /* Stop searching for more declarations. */ | |
5818 | ||
5819 | } | |
5820 | ||
5821 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
5822 | || gfc_match_eos () != MATCH_YES) | |
5823 | { | |
5824 | gfc_error ("Expected \",\" or end of statement at %C"); | |
5825 | return MATCH_ERROR; | |
5826 | } | |
5827 | return MATCH_YES; | |
5828 | } | |
5829 | ||
5830 | ||
6de9cd9a DN |
5831 | match |
5832 | gfc_match_external (void) | |
5833 | { | |
5834 | ||
5835 | gfc_clear_attr (¤t_attr); | |
1902704e | 5836 | current_attr.external = 1; |
6de9cd9a DN |
5837 | |
5838 | return attr_decl (); | |
5839 | } | |
5840 | ||
5841 | ||
6de9cd9a DN |
5842 | match |
5843 | gfc_match_intent (void) | |
5844 | { | |
5845 | sym_intent intent; | |
5846 | ||
5847 | intent = match_intent_spec (); | |
5848 | if (intent == INTENT_UNKNOWN) | |
5849 | return MATCH_ERROR; | |
5850 | ||
5851 | gfc_clear_attr (¤t_attr); | |
1902704e | 5852 | current_attr.intent = intent; |
6de9cd9a DN |
5853 | |
5854 | return attr_decl (); | |
5855 | } | |
5856 | ||
5857 | ||
5858 | match | |
5859 | gfc_match_intrinsic (void) | |
5860 | { | |
5861 | ||
5862 | gfc_clear_attr (¤t_attr); | |
1902704e | 5863 | current_attr.intrinsic = 1; |
6de9cd9a DN |
5864 | |
5865 | return attr_decl (); | |
5866 | } | |
5867 | ||
5868 | ||
5869 | match | |
5870 | gfc_match_optional (void) | |
5871 | { | |
5872 | ||
5873 | gfc_clear_attr (¤t_attr); | |
1902704e | 5874 | current_attr.optional = 1; |
6de9cd9a DN |
5875 | |
5876 | return attr_decl (); | |
5877 | } | |
5878 | ||
5879 | ||
5880 | match | |
5881 | gfc_match_pointer (void) | |
5882 | { | |
83d890b9 | 5883 | gfc_gobble_whitespace (); |
8fc541d3 | 5884 | if (gfc_peek_ascii_char () == '(') |
83d890b9 AL |
5885 | { |
5886 | if (!gfc_option.flag_cray_pointer) | |
5887 | { | |
636dff67 SK |
5888 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
5889 | "flag"); | |
83d890b9 AL |
5890 | return MATCH_ERROR; |
5891 | } | |
5892 | return cray_pointer_decl (); | |
5893 | } | |
5894 | else | |
5895 | { | |
5896 | gfc_clear_attr (¤t_attr); | |
1902704e | 5897 | current_attr.pointer = 1; |
83d890b9 AL |
5898 | |
5899 | return attr_decl (); | |
5900 | } | |
6de9cd9a DN |
5901 | } |
5902 | ||
5903 | ||
5904 | match | |
5905 | gfc_match_allocatable (void) | |
5906 | { | |
6de9cd9a | 5907 | gfc_clear_attr (¤t_attr); |
1902704e | 5908 | current_attr.allocatable = 1; |
6de9cd9a DN |
5909 | |
5910 | return attr_decl (); | |
5911 | } | |
5912 | ||
5913 | ||
5914 | match | |
5915 | gfc_match_dimension (void) | |
5916 | { | |
6de9cd9a | 5917 | gfc_clear_attr (¤t_attr); |
1902704e | 5918 | current_attr.dimension = 1; |
6de9cd9a DN |
5919 | |
5920 | return attr_decl (); | |
5921 | } | |
5922 | ||
5923 | ||
5924 | match | |
5925 | gfc_match_target (void) | |
5926 | { | |
6de9cd9a | 5927 | gfc_clear_attr (¤t_attr); |
1902704e | 5928 | current_attr.target = 1; |
6de9cd9a DN |
5929 | |
5930 | return attr_decl (); | |
5931 | } | |
5932 | ||
5933 | ||
5934 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
5935 | statement. */ | |
5936 | ||
5937 | static match | |
5938 | access_attr_decl (gfc_statement st) | |
5939 | { | |
5940 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5941 | interface_type type; | |
5942 | gfc_user_op *uop; | |
5943 | gfc_symbol *sym; | |
a1ee985f | 5944 | gfc_intrinsic_op op; |
6de9cd9a DN |
5945 | match m; |
5946 | ||
5947 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5948 | goto done; | |
5949 | ||
5950 | for (;;) | |
5951 | { | |
a1ee985f | 5952 | m = gfc_match_generic_spec (&type, name, &op); |
6de9cd9a DN |
5953 | if (m == MATCH_NO) |
5954 | goto syntax; | |
5955 | if (m == MATCH_ERROR) | |
5956 | return MATCH_ERROR; | |
5957 | ||
5958 | switch (type) | |
5959 | { | |
5960 | case INTERFACE_NAMELESS: | |
9e1d712c | 5961 | case INTERFACE_ABSTRACT: |
6de9cd9a DN |
5962 | goto syntax; |
5963 | ||
5964 | case INTERFACE_GENERIC: | |
5965 | if (gfc_get_symbol (name, NULL, &sym)) | |
5966 | goto done; | |
5967 | ||
636dff67 SK |
5968 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
5969 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
231b2fcc | 5970 | sym->name, NULL) == FAILURE) |
6de9cd9a DN |
5971 | return MATCH_ERROR; |
5972 | ||
5973 | break; | |
5974 | ||
5975 | case INTERFACE_INTRINSIC_OP: | |
a1ee985f | 5976 | if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN) |
6de9cd9a | 5977 | { |
a1ee985f | 5978 | gfc_current_ns->operator_access[op] = |
6de9cd9a DN |
5979 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; |
5980 | } | |
5981 | else | |
5982 | { | |
5983 | gfc_error ("Access specification of the %s operator at %C has " | |
a1ee985f | 5984 | "already been specified", gfc_op2string (op)); |
6de9cd9a DN |
5985 | goto done; |
5986 | } | |
5987 | ||
5988 | break; | |
5989 | ||
5990 | case INTERFACE_USER_OP: | |
5991 | uop = gfc_get_uop (name); | |
5992 | ||
5993 | if (uop->access == ACCESS_UNKNOWN) | |
5994 | { | |
636dff67 SK |
5995 | uop->access = (st == ST_PUBLIC) |
5996 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
6de9cd9a DN |
5997 | } |
5998 | else | |
5999 | { | |
636dff67 SK |
6000 | gfc_error ("Access specification of the .%s. operator at %C " |
6001 | "has already been specified", sym->name); | |
6de9cd9a DN |
6002 | goto done; |
6003 | } | |
6004 | ||
6005 | break; | |
6006 | } | |
6007 | ||
6008 | if (gfc_match_char (',') == MATCH_NO) | |
6009 | break; | |
6010 | } | |
6011 | ||
6012 | if (gfc_match_eos () != MATCH_YES) | |
6013 | goto syntax; | |
6014 | return MATCH_YES; | |
6015 | ||
6016 | syntax: | |
6017 | gfc_syntax_error (st); | |
6018 | ||
6019 | done: | |
6020 | return MATCH_ERROR; | |
6021 | } | |
6022 | ||
6023 | ||
ee7e677f TB |
6024 | match |
6025 | gfc_match_protected (void) | |
6026 | { | |
6027 | gfc_symbol *sym; | |
6028 | match m; | |
6029 | ||
6030 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
6031 | { | |
6032 | gfc_error ("PROTECTED at %C only allowed in specification " | |
6033 | "part of a module"); | |
6034 | return MATCH_ERROR; | |
6035 | ||
6036 | } | |
6037 | ||
636dff67 | 6038 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
ee7e677f TB |
6039 | == FAILURE) |
6040 | return MATCH_ERROR; | |
6041 | ||
6042 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6043 | { | |
6044 | return MATCH_ERROR; | |
6045 | } | |
6046 | ||
6047 | if (gfc_match_eos () == MATCH_YES) | |
6048 | goto syntax; | |
6049 | ||
6050 | for(;;) | |
6051 | { | |
6052 | m = gfc_match_symbol (&sym, 0); | |
6053 | switch (m) | |
6054 | { | |
6055 | case MATCH_YES: | |
636dff67 SK |
6056 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
6057 | == FAILURE) | |
ee7e677f TB |
6058 | return MATCH_ERROR; |
6059 | goto next_item; | |
6060 | ||
6061 | case MATCH_NO: | |
6062 | break; | |
6063 | ||
6064 | case MATCH_ERROR: | |
6065 | return MATCH_ERROR; | |
6066 | } | |
6067 | ||
6068 | next_item: | |
6069 | if (gfc_match_eos () == MATCH_YES) | |
6070 | break; | |
6071 | if (gfc_match_char (',') != MATCH_YES) | |
6072 | goto syntax; | |
6073 | } | |
6074 | ||
6075 | return MATCH_YES; | |
6076 | ||
6077 | syntax: | |
6078 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
6079 | return MATCH_ERROR; | |
6080 | } | |
6081 | ||
6082 | ||
86bf520d | 6083 | /* The PRIVATE statement is a bit weird in that it can be an attribute |
df2fba9e | 6084 | declaration, but also works as a standalone statement inside of a |
6de9cd9a DN |
6085 | type declaration or a module. */ |
6086 | ||
6087 | match | |
636dff67 | 6088 | gfc_match_private (gfc_statement *st) |
6de9cd9a DN |
6089 | { |
6090 | ||
6091 | if (gfc_match ("private") != MATCH_YES) | |
6092 | return MATCH_NO; | |
6093 | ||
d51347f9 | 6094 | if (gfc_current_state () != COMP_MODULE |
30b608eb DK |
6095 | && !(gfc_current_state () == COMP_DERIVED |
6096 | && gfc_state_stack->previous | |
6097 | && gfc_state_stack->previous->state == COMP_MODULE) | |
6098 | && !(gfc_current_state () == COMP_DERIVED_CONTAINS | |
6099 | && gfc_state_stack->previous && gfc_state_stack->previous->previous | |
6100 | && gfc_state_stack->previous->previous->state == COMP_MODULE)) | |
d51347f9 TB |
6101 | { |
6102 | gfc_error ("PRIVATE statement at %C is only allowed in the " | |
6103 | "specification part of a module"); | |
6104 | return MATCH_ERROR; | |
6105 | } | |
6106 | ||
6de9cd9a DN |
6107 | if (gfc_current_state () == COMP_DERIVED) |
6108 | { | |
6109 | if (gfc_match_eos () == MATCH_YES) | |
6110 | { | |
6111 | *st = ST_PRIVATE; | |
6112 | return MATCH_YES; | |
6113 | } | |
6114 | ||
6115 | gfc_syntax_error (ST_PRIVATE); | |
6116 | return MATCH_ERROR; | |
6117 | } | |
6118 | ||
6119 | if (gfc_match_eos () == MATCH_YES) | |
6120 | { | |
6121 | *st = ST_PRIVATE; | |
6122 | return MATCH_YES; | |
6123 | } | |
6124 | ||
6125 | *st = ST_ATTR_DECL; | |
6126 | return access_attr_decl (ST_PRIVATE); | |
6127 | } | |
6128 | ||
6129 | ||
6130 | match | |
636dff67 | 6131 | gfc_match_public (gfc_statement *st) |
6de9cd9a DN |
6132 | { |
6133 | ||
6134 | if (gfc_match ("public") != MATCH_YES) | |
6135 | return MATCH_NO; | |
6136 | ||
d51347f9 TB |
6137 | if (gfc_current_state () != COMP_MODULE) |
6138 | { | |
6139 | gfc_error ("PUBLIC statement at %C is only allowed in the " | |
6140 | "specification part of a module"); | |
6141 | return MATCH_ERROR; | |
6142 | } | |
6143 | ||
6de9cd9a DN |
6144 | if (gfc_match_eos () == MATCH_YES) |
6145 | { | |
6146 | *st = ST_PUBLIC; | |
6147 | return MATCH_YES; | |
6148 | } | |
6149 | ||
6150 | *st = ST_ATTR_DECL; | |
6151 | return access_attr_decl (ST_PUBLIC); | |
6152 | } | |
6153 | ||
6154 | ||
6155 | /* Workhorse for gfc_match_parameter. */ | |
6156 | ||
6157 | static match | |
6158 | do_parm (void) | |
6159 | { | |
6160 | gfc_symbol *sym; | |
6161 | gfc_expr *init; | |
6162 | match m; | |
6163 | ||
6164 | m = gfc_match_symbol (&sym, 0); | |
6165 | if (m == MATCH_NO) | |
6166 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
6167 | ||
6168 | if (m != MATCH_YES) | |
6169 | return m; | |
6170 | ||
6171 | if (gfc_match_char ('=') == MATCH_NO) | |
6172 | { | |
6173 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
6174 | return MATCH_ERROR; | |
6175 | } | |
6176 | ||
6177 | m = gfc_match_init_expr (&init); | |
6178 | if (m == MATCH_NO) | |
6179 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
6180 | if (m != MATCH_YES) | |
6181 | return m; | |
6182 | ||
6183 | if (sym->ts.type == BT_UNKNOWN | |
6184 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
6185 | { | |
6186 | m = MATCH_ERROR; | |
6187 | goto cleanup; | |
6188 | } | |
6189 | ||
6190 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
231b2fcc | 6191 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
6192 | { |
6193 | m = MATCH_ERROR; | |
6194 | goto cleanup; | |
6195 | } | |
6196 | ||
1283ab12 TB |
6197 | if (sym->value) |
6198 | { | |
6199 | gfc_error ("Initializing already initialized variable at %C"); | |
6200 | m = MATCH_ERROR; | |
6201 | goto cleanup; | |
6202 | } | |
6203 | ||
7e2eba4b DE |
6204 | if (sym->ts.type == BT_CHARACTER |
6205 | && sym->ts.cl != NULL | |
6206 | && sym->ts.cl->length != NULL | |
6207 | && sym->ts.cl->length->expr_type == EXPR_CONSTANT | |
6208 | && init->expr_type == EXPR_CONSTANT | |
357ad64f | 6209 | && init->ts.type == BT_CHARACTER) |
7e2eba4b | 6210 | gfc_set_constant_character_len ( |
d2848082 | 6211 | mpz_get_si (sym->ts.cl->length->value.integer), init, -1); |
357ad64f TB |
6212 | else if (sym->ts.type == BT_CHARACTER && sym->ts.cl != NULL |
6213 | && sym->ts.cl->length == NULL) | |
6214 | { | |
6215 | int clen; | |
6216 | if (init->expr_type == EXPR_CONSTANT) | |
6217 | { | |
6218 | clen = init->value.character.length; | |
6219 | sym->ts.cl->length = gfc_int_expr (clen); | |
6220 | } | |
6221 | else if (init->expr_type == EXPR_ARRAY) | |
6222 | { | |
6223 | gfc_expr *p = init->value.constructor->expr; | |
6224 | clen = p->value.character.length; | |
6225 | sym->ts.cl->length = gfc_int_expr (clen); | |
6226 | } | |
6227 | else if (init->ts.cl && init->ts.cl->length) | |
6228 | sym->ts.cl->length = gfc_copy_expr (sym->value->ts.cl->length); | |
6229 | } | |
7e2eba4b | 6230 | |
6de9cd9a DN |
6231 | sym->value = init; |
6232 | return MATCH_YES; | |
6233 | ||
6234 | cleanup: | |
6235 | gfc_free_expr (init); | |
6236 | return m; | |
6237 | } | |
6238 | ||
6239 | ||
6240 | /* Match a parameter statement, with the weird syntax that these have. */ | |
6241 | ||
6242 | match | |
6243 | gfc_match_parameter (void) | |
6244 | { | |
6245 | match m; | |
6246 | ||
6247 | if (gfc_match_char ('(') == MATCH_NO) | |
6248 | return MATCH_NO; | |
6249 | ||
6250 | for (;;) | |
6251 | { | |
6252 | m = do_parm (); | |
6253 | if (m != MATCH_YES) | |
6254 | break; | |
6255 | ||
6256 | if (gfc_match (" )%t") == MATCH_YES) | |
6257 | break; | |
6258 | ||
6259 | if (gfc_match_char (',') != MATCH_YES) | |
6260 | { | |
6261 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
6262 | m = MATCH_ERROR; | |
6263 | break; | |
6264 | } | |
6265 | } | |
6266 | ||
6267 | return m; | |
6268 | } | |
6269 | ||
6270 | ||
6271 | /* Save statements have a special syntax. */ | |
6272 | ||
6273 | match | |
6274 | gfc_match_save (void) | |
6275 | { | |
9056bd70 TS |
6276 | char n[GFC_MAX_SYMBOL_LEN+1]; |
6277 | gfc_common_head *c; | |
6de9cd9a DN |
6278 | gfc_symbol *sym; |
6279 | match m; | |
6280 | ||
6281 | if (gfc_match_eos () == MATCH_YES) | |
6282 | { | |
6283 | if (gfc_current_ns->seen_save) | |
6284 | { | |
636dff67 SK |
6285 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
6286 | "follows previous SAVE statement") | |
09e87839 AL |
6287 | == FAILURE) |
6288 | return MATCH_ERROR; | |
6de9cd9a DN |
6289 | } |
6290 | ||
6291 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
6292 | return MATCH_YES; | |
6293 | } | |
6294 | ||
6295 | if (gfc_current_ns->save_all) | |
6296 | { | |
636dff67 SK |
6297 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
6298 | "blanket SAVE statement") | |
09e87839 AL |
6299 | == FAILURE) |
6300 | return MATCH_ERROR; | |
6de9cd9a DN |
6301 | } |
6302 | ||
6303 | gfc_match (" ::"); | |
6304 | ||
6305 | for (;;) | |
6306 | { | |
6307 | m = gfc_match_symbol (&sym, 0); | |
6308 | switch (m) | |
6309 | { | |
6310 | case MATCH_YES: | |
636dff67 SK |
6311 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
6312 | == FAILURE) | |
6de9cd9a DN |
6313 | return MATCH_ERROR; |
6314 | goto next_item; | |
6315 | ||
6316 | case MATCH_NO: | |
6317 | break; | |
6318 | ||
6319 | case MATCH_ERROR: | |
6320 | return MATCH_ERROR; | |
6321 | } | |
6322 | ||
9056bd70 | 6323 | m = gfc_match (" / %n /", &n); |
6de9cd9a DN |
6324 | if (m == MATCH_ERROR) |
6325 | return MATCH_ERROR; | |
6326 | if (m == MATCH_NO) | |
6327 | goto syntax; | |
6328 | ||
53814b8f | 6329 | c = gfc_get_common (n, 0); |
9056bd70 TS |
6330 | c->saved = 1; |
6331 | ||
6de9cd9a DN |
6332 | gfc_current_ns->seen_save = 1; |
6333 | ||
6334 | next_item: | |
6335 | if (gfc_match_eos () == MATCH_YES) | |
6336 | break; | |
6337 | if (gfc_match_char (',') != MATCH_YES) | |
6338 | goto syntax; | |
6339 | } | |
6340 | ||
6341 | return MATCH_YES; | |
6342 | ||
6343 | syntax: | |
6344 | gfc_error ("Syntax error in SAVE statement at %C"); | |
6345 | return MATCH_ERROR; | |
6346 | } | |
6347 | ||
6348 | ||
06469efd PT |
6349 | match |
6350 | gfc_match_value (void) | |
6351 | { | |
6352 | gfc_symbol *sym; | |
6353 | match m; | |
6354 | ||
636dff67 | 6355 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
06469efd PT |
6356 | == FAILURE) |
6357 | return MATCH_ERROR; | |
6358 | ||
6359 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6360 | { | |
6361 | return MATCH_ERROR; | |
6362 | } | |
6363 | ||
6364 | if (gfc_match_eos () == MATCH_YES) | |
6365 | goto syntax; | |
6366 | ||
6367 | for(;;) | |
6368 | { | |
6369 | m = gfc_match_symbol (&sym, 0); | |
6370 | switch (m) | |
6371 | { | |
6372 | case MATCH_YES: | |
636dff67 SK |
6373 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
6374 | == FAILURE) | |
06469efd PT |
6375 | return MATCH_ERROR; |
6376 | goto next_item; | |
6377 | ||
6378 | case MATCH_NO: | |
6379 | break; | |
6380 | ||
6381 | case MATCH_ERROR: | |
6382 | return MATCH_ERROR; | |
6383 | } | |
6384 | ||
6385 | next_item: | |
6386 | if (gfc_match_eos () == MATCH_YES) | |
6387 | break; | |
6388 | if (gfc_match_char (',') != MATCH_YES) | |
6389 | goto syntax; | |
6390 | } | |
6391 | ||
6392 | return MATCH_YES; | |
6393 | ||
6394 | syntax: | |
6395 | gfc_error ("Syntax error in VALUE statement at %C"); | |
6396 | return MATCH_ERROR; | |
6397 | } | |
6398 | ||
66e4ab31 | 6399 | |
775e6c3a TB |
6400 | match |
6401 | gfc_match_volatile (void) | |
6402 | { | |
6403 | gfc_symbol *sym; | |
6404 | match m; | |
6405 | ||
636dff67 | 6406 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
775e6c3a TB |
6407 | == FAILURE) |
6408 | return MATCH_ERROR; | |
6409 | ||
6410 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6411 | { | |
6412 | return MATCH_ERROR; | |
6413 | } | |
6414 | ||
6415 | if (gfc_match_eos () == MATCH_YES) | |
6416 | goto syntax; | |
6417 | ||
6418 | for(;;) | |
6419 | { | |
9bce3c1c TB |
6420 | /* VOLATILE is special because it can be added to host-associated |
6421 | symbols locally. */ | |
6422 | m = gfc_match_symbol (&sym, 1); | |
775e6c3a TB |
6423 | switch (m) |
6424 | { | |
6425 | case MATCH_YES: | |
636dff67 SK |
6426 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
6427 | == FAILURE) | |
775e6c3a TB |
6428 | return MATCH_ERROR; |
6429 | goto next_item; | |
6430 | ||
6431 | case MATCH_NO: | |
6432 | break; | |
6433 | ||
6434 | case MATCH_ERROR: | |
6435 | return MATCH_ERROR; | |
6436 | } | |
6437 | ||
6438 | next_item: | |
6439 | if (gfc_match_eos () == MATCH_YES) | |
6440 | break; | |
6441 | if (gfc_match_char (',') != MATCH_YES) | |
6442 | goto syntax; | |
6443 | } | |
6444 | ||
6445 | return MATCH_YES; | |
6446 | ||
6447 | syntax: | |
6448 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
6449 | return MATCH_ERROR; | |
6450 | } | |
6451 | ||
6452 | ||
6de9cd9a DN |
6453 | /* Match a module procedure statement. Note that we have to modify |
6454 | symbols in the parent's namespace because the current one was there | |
49de9e73 | 6455 | to receive symbols that are in an interface's formal argument list. */ |
6de9cd9a DN |
6456 | |
6457 | match | |
6458 | gfc_match_modproc (void) | |
6459 | { | |
6460 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6461 | gfc_symbol *sym; | |
6462 | match m; | |
060fca4a | 6463 | gfc_namespace *module_ns; |
2b77e908 | 6464 | gfc_interface *old_interface_head, *interface; |
6de9cd9a DN |
6465 | |
6466 | if (gfc_state_stack->state != COMP_INTERFACE | |
6467 | || gfc_state_stack->previous == NULL | |
129d15a3 JW |
6468 | || current_interface.type == INTERFACE_NAMELESS |
6469 | || current_interface.type == INTERFACE_ABSTRACT) | |
6de9cd9a | 6470 | { |
636dff67 SK |
6471 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
6472 | "interface"); | |
6de9cd9a DN |
6473 | return MATCH_ERROR; |
6474 | } | |
6475 | ||
060fca4a PT |
6476 | module_ns = gfc_current_ns->parent; |
6477 | for (; module_ns; module_ns = module_ns->parent) | |
6478 | if (module_ns->proc_name->attr.flavor == FL_MODULE) | |
6479 | break; | |
6480 | ||
6481 | if (module_ns == NULL) | |
6482 | return MATCH_ERROR; | |
6483 | ||
2b77e908 FXC |
6484 | /* Store the current state of the interface. We will need it if we |
6485 | end up with a syntax error and need to recover. */ | |
6486 | old_interface_head = gfc_current_interface_head (); | |
6487 | ||
6de9cd9a DN |
6488 | for (;;) |
6489 | { | |
2b77e908 FXC |
6490 | bool last = false; |
6491 | ||
6de9cd9a DN |
6492 | m = gfc_match_name (name); |
6493 | if (m == MATCH_NO) | |
6494 | goto syntax; | |
6495 | if (m != MATCH_YES) | |
6496 | return MATCH_ERROR; | |
6497 | ||
2b77e908 FXC |
6498 | /* Check for syntax error before starting to add symbols to the |
6499 | current namespace. */ | |
6500 | if (gfc_match_eos () == MATCH_YES) | |
6501 | last = true; | |
6502 | if (!last && gfc_match_char (',') != MATCH_YES) | |
6503 | goto syntax; | |
6504 | ||
6505 | /* Now we're sure the syntax is valid, we process this item | |
6506 | further. */ | |
060fca4a | 6507 | if (gfc_get_symbol (name, module_ns, &sym)) |
6de9cd9a DN |
6508 | return MATCH_ERROR; |
6509 | ||
6510 | if (sym->attr.proc != PROC_MODULE | |
231b2fcc TS |
6511 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
6512 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
6513 | return MATCH_ERROR; |
6514 | ||
6515 | if (gfc_add_interface (sym) == FAILURE) | |
6516 | return MATCH_ERROR; | |
6517 | ||
71f77fd7 PT |
6518 | sym->attr.mod_proc = 1; |
6519 | ||
2b77e908 | 6520 | if (last) |
6de9cd9a | 6521 | break; |
6de9cd9a DN |
6522 | } |
6523 | ||
6524 | return MATCH_YES; | |
6525 | ||
6526 | syntax: | |
2b77e908 FXC |
6527 | /* Restore the previous state of the interface. */ |
6528 | interface = gfc_current_interface_head (); | |
6529 | gfc_set_current_interface_head (old_interface_head); | |
6530 | ||
6531 | /* Free the new interfaces. */ | |
6532 | while (interface != old_interface_head) | |
6533 | { | |
6534 | gfc_interface *i = interface->next; | |
6535 | gfc_free (interface); | |
6536 | interface = i; | |
6537 | } | |
6538 | ||
6539 | /* And issue a syntax error. */ | |
6de9cd9a DN |
6540 | gfc_syntax_error (ST_MODULE_PROC); |
6541 | return MATCH_ERROR; | |
6542 | } | |
6543 | ||
6544 | ||
7d1f1e61 PT |
6545 | /* Check a derived type that is being extended. */ |
6546 | static gfc_symbol* | |
6547 | check_extended_derived_type (char *name) | |
6548 | { | |
6549 | gfc_symbol *extended; | |
6550 | ||
6551 | if (gfc_find_symbol (name, gfc_current_ns, 1, &extended)) | |
6552 | { | |
6553 | gfc_error ("Ambiguous symbol in TYPE definition at %C"); | |
6554 | return NULL; | |
6555 | } | |
6556 | ||
6557 | if (!extended) | |
6558 | { | |
6559 | gfc_error ("No such symbol in TYPE definition at %C"); | |
6560 | return NULL; | |
6561 | } | |
6562 | ||
6563 | if (extended->attr.flavor != FL_DERIVED) | |
6564 | { | |
6565 | gfc_error ("'%s' in EXTENDS expression at %C is not a " | |
6566 | "derived type", name); | |
6567 | return NULL; | |
6568 | } | |
6569 | ||
6570 | if (extended->attr.is_bind_c) | |
6571 | { | |
6572 | gfc_error ("'%s' cannot be extended at %C because it " | |
6573 | "is BIND(C)", extended->name); | |
6574 | return NULL; | |
6575 | } | |
6576 | ||
6577 | if (extended->attr.sequence) | |
6578 | { | |
6579 | gfc_error ("'%s' cannot be extended at %C because it " | |
6580 | "is a SEQUENCE type", extended->name); | |
6581 | return NULL; | |
6582 | } | |
6583 | ||
6584 | return extended; | |
6585 | } | |
6586 | ||
6587 | ||
a8b3b0b6 CR |
6588 | /* Match the optional attribute specifiers for a type declaration. |
6589 | Return MATCH_ERROR if an error is encountered in one of the handled | |
6590 | attributes (public, private, bind(c)), MATCH_NO if what's found is | |
6591 | not a handled attribute, and MATCH_YES otherwise. TODO: More error | |
6592 | checking on attribute conflicts needs to be done. */ | |
6de9cd9a DN |
6593 | |
6594 | match | |
7d1f1e61 | 6595 | gfc_get_type_attr_spec (symbol_attribute *attr, char *name) |
6de9cd9a | 6596 | { |
a8b3b0b6 | 6597 | /* See if the derived type is marked as private. */ |
6de9cd9a DN |
6598 | if (gfc_match (" , private") == MATCH_YES) |
6599 | { | |
d51347f9 | 6600 | if (gfc_current_state () != COMP_MODULE) |
6de9cd9a | 6601 | { |
d51347f9 TB |
6602 | gfc_error ("Derived type at %C can only be PRIVATE in the " |
6603 | "specification part of a module"); | |
6de9cd9a DN |
6604 | return MATCH_ERROR; |
6605 | } | |
6606 | ||
a8b3b0b6 | 6607 | if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
6de9cd9a | 6608 | return MATCH_ERROR; |
6de9cd9a | 6609 | } |
a8b3b0b6 | 6610 | else if (gfc_match (" , public") == MATCH_YES) |
6de9cd9a | 6611 | { |
d51347f9 | 6612 | if (gfc_current_state () != COMP_MODULE) |
6de9cd9a | 6613 | { |
d51347f9 TB |
6614 | gfc_error ("Derived type at %C can only be PUBLIC in the " |
6615 | "specification part of a module"); | |
6de9cd9a DN |
6616 | return MATCH_ERROR; |
6617 | } | |
6618 | ||
a8b3b0b6 | 6619 | if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
6de9cd9a | 6620 | return MATCH_ERROR; |
6de9cd9a | 6621 | } |
52f49934 | 6622 | else if (gfc_match (" , bind ( c )") == MATCH_YES) |
a8b3b0b6 CR |
6623 | { |
6624 | /* If the type is defined to be bind(c) it then needs to make | |
6625 | sure that all fields are interoperable. This will | |
6626 | need to be a semantic check on the finished derived type. | |
6627 | See 15.2.3 (lines 9-12) of F2003 draft. */ | |
6628 | if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) | |
6629 | return MATCH_ERROR; | |
6630 | ||
6631 | /* TODO: attr conflicts need to be checked, probably in symbol.c. */ | |
6632 | } | |
52f49934 DK |
6633 | else if (gfc_match (" , abstract") == MATCH_YES) |
6634 | { | |
6635 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C") | |
6636 | == FAILURE) | |
6637 | return MATCH_ERROR; | |
6638 | ||
6639 | if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE) | |
6640 | return MATCH_ERROR; | |
6641 | } | |
7d1f1e61 PT |
6642 | else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES) |
6643 | { | |
63a3341a | 6644 | if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE) |
7d1f1e61 PT |
6645 | return MATCH_ERROR; |
6646 | } | |
a8b3b0b6 CR |
6647 | else |
6648 | return MATCH_NO; | |
6649 | ||
6650 | /* If we get here, something matched. */ | |
6651 | return MATCH_YES; | |
6652 | } | |
6653 | ||
6654 | ||
6655 | /* Match the beginning of a derived type declaration. If a type name | |
6656 | was the result of a function, then it is possible to have a symbol | |
6657 | already to be known as a derived type yet have no components. */ | |
6658 | ||
6659 | match | |
6660 | gfc_match_derived_decl (void) | |
6661 | { | |
6662 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7d1f1e61 | 6663 | char parent[GFC_MAX_SYMBOL_LEN + 1]; |
a8b3b0b6 CR |
6664 | symbol_attribute attr; |
6665 | gfc_symbol *sym; | |
7d1f1e61 | 6666 | gfc_symbol *extended; |
a8b3b0b6 CR |
6667 | match m; |
6668 | match is_type_attr_spec = MATCH_NO; | |
e7303e85 | 6669 | bool seen_attr = false; |
a8b3b0b6 CR |
6670 | |
6671 | if (gfc_current_state () == COMP_DERIVED) | |
6672 | return MATCH_NO; | |
6673 | ||
7d1f1e61 PT |
6674 | name[0] = '\0'; |
6675 | parent[0] = '\0'; | |
a8b3b0b6 | 6676 | gfc_clear_attr (&attr); |
7d1f1e61 | 6677 | extended = NULL; |
a8b3b0b6 CR |
6678 | |
6679 | do | |
6680 | { | |
7d1f1e61 | 6681 | is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent); |
a8b3b0b6 CR |
6682 | if (is_type_attr_spec == MATCH_ERROR) |
6683 | return MATCH_ERROR; | |
e7303e85 FXC |
6684 | if (is_type_attr_spec == MATCH_YES) |
6685 | seen_attr = true; | |
a8b3b0b6 | 6686 | } while (is_type_attr_spec == MATCH_YES); |
6de9cd9a | 6687 | |
63a3341a PT |
6688 | /* Deal with derived type extensions. The extension attribute has |
6689 | been added to 'attr' but now the parent type must be found and | |
6690 | checked. */ | |
7d1f1e61 PT |
6691 | if (parent[0]) |
6692 | extended = check_extended_derived_type (parent); | |
6693 | ||
6694 | if (parent[0] && !extended) | |
6695 | return MATCH_ERROR; | |
6696 | ||
e7303e85 | 6697 | if (gfc_match (" ::") != MATCH_YES && seen_attr) |
6de9cd9a DN |
6698 | { |
6699 | gfc_error ("Expected :: in TYPE definition at %C"); | |
6700 | return MATCH_ERROR; | |
6701 | } | |
6702 | ||
6703 | m = gfc_match (" %n%t", name); | |
6704 | if (m != MATCH_YES) | |
6705 | return m; | |
6706 | ||
e9c06563 TB |
6707 | /* Make sure the name is not the name of an intrinsic type. */ |
6708 | if (gfc_is_intrinsic_typename (name)) | |
6de9cd9a | 6709 | { |
636dff67 SK |
6710 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
6711 | "type", name); | |
6de9cd9a DN |
6712 | return MATCH_ERROR; |
6713 | } | |
6714 | ||
6715 | if (gfc_get_symbol (name, NULL, &sym)) | |
6716 | return MATCH_ERROR; | |
6717 | ||
6718 | if (sym->ts.type != BT_UNKNOWN) | |
6719 | { | |
6720 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
6721 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
6722 | return MATCH_ERROR; | |
6723 | } | |
6724 | ||
6725 | /* The symbol may already have the derived attribute without the | |
6726 | components. The ways this can happen is via a function | |
6727 | definition, an INTRINSIC statement or a subtype in another | |
6728 | derived type that is a pointer. The first part of the AND clause | |
df2fba9e | 6729 | is true if the symbol is not the return value of a function. */ |
6de9cd9a | 6730 | if (sym->attr.flavor != FL_DERIVED |
231b2fcc | 6731 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
6732 | return MATCH_ERROR; |
6733 | ||
9fa6b0af | 6734 | if (sym->components != NULL || sym->attr.zero_comp) |
6de9cd9a | 6735 | { |
636dff67 SK |
6736 | gfc_error ("Derived type definition of '%s' at %C has already been " |
6737 | "defined", sym->name); | |
6de9cd9a DN |
6738 | return MATCH_ERROR; |
6739 | } | |
6740 | ||
6741 | if (attr.access != ACCESS_UNKNOWN | |
231b2fcc | 6742 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
6743 | return MATCH_ERROR; |
6744 | ||
a8b3b0b6 CR |
6745 | /* See if the derived type was labeled as bind(c). */ |
6746 | if (attr.is_bind_c != 0) | |
6747 | sym->attr.is_bind_c = attr.is_bind_c; | |
6748 | ||
34523524 DK |
6749 | /* Construct the f2k_derived namespace if it is not yet there. */ |
6750 | if (!sym->f2k_derived) | |
6751 | sym->f2k_derived = gfc_get_namespace (NULL, 0); | |
7d1f1e61 PT |
6752 | |
6753 | if (extended && !sym->components) | |
6754 | { | |
6755 | gfc_component *p; | |
6756 | gfc_symtree *st; | |
6757 | ||
6758 | /* Add the extended derived type as the first component. */ | |
6759 | gfc_add_component (sym, parent, &p); | |
63a3341a | 6760 | sym->attr.extension = attr.extension; |
7d1f1e61 PT |
6761 | extended->refs++; |
6762 | gfc_set_sym_referenced (extended); | |
6763 | ||
6764 | p->ts.type = BT_DERIVED; | |
6765 | p->ts.derived = extended; | |
6766 | p->initializer = gfc_default_initializer (&p->ts); | |
6767 | ||
6768 | /* Provide the links between the extended type and its extension. */ | |
6769 | if (!extended->f2k_derived) | |
6770 | extended->f2k_derived = gfc_get_namespace (NULL, 0); | |
6771 | st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name); | |
6772 | st->n.sym = sym; | |
6773 | } | |
6774 | ||
52f49934 DK |
6775 | /* Take over the ABSTRACT attribute. */ |
6776 | sym->attr.abstract = attr.abstract; | |
6777 | ||
6de9cd9a DN |
6778 | gfc_new_block = sym; |
6779 | ||
6780 | return MATCH_YES; | |
6781 | } | |
83d890b9 AL |
6782 | |
6783 | ||
6784 | /* Cray Pointees can be declared as: | |
6785 | pointer (ipt, a (n,m,...,*)) | |
6786 | By default, this is treated as an AS_ASSUMED_SIZE array. We'll | |
6787 | cheat and set a constant bound of 1 for the last dimension, if this | |
6788 | is the case. Since there is no bounds-checking for Cray Pointees, | |
6789 | this will be okay. */ | |
6790 | ||
32e8bb8e | 6791 | match |
83d890b9 AL |
6792 | gfc_mod_pointee_as (gfc_array_spec *as) |
6793 | { | |
6794 | as->cray_pointee = true; /* This will be useful to know later. */ | |
6795 | if (as->type == AS_ASSUMED_SIZE) | |
6796 | { | |
6797 | as->type = AS_EXPLICIT; | |
6798 | as->upper[as->rank - 1] = gfc_int_expr (1); | |
6799 | as->cp_was_assumed = true; | |
6800 | } | |
6801 | else if (as->type == AS_ASSUMED_SHAPE) | |
6802 | { | |
6803 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
6804 | return MATCH_ERROR; | |
6805 | } | |
6806 | return MATCH_YES; | |
6807 | } | |
25d8f0a2 TS |
6808 | |
6809 | ||
6810 | /* Match the enum definition statement, here we are trying to match | |
6811 | the first line of enum definition statement. | |
6812 | Returns MATCH_YES if match is found. */ | |
6813 | ||
6814 | match | |
6815 | gfc_match_enum (void) | |
6816 | { | |
6817 | match m; | |
6818 | ||
6819 | m = gfc_match_eos (); | |
6820 | if (m != MATCH_YES) | |
6821 | return m; | |
6822 | ||
6133c68a | 6823 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") |
25d8f0a2 TS |
6824 | == FAILURE) |
6825 | return MATCH_ERROR; | |
6826 | ||
6827 | return MATCH_YES; | |
6828 | } | |
6829 | ||
6830 | ||
31224396 SK |
6831 | /* Returns an initializer whose value is one higher than the value of the |
6832 | LAST_INITIALIZER argument. If the argument is NULL, the | |
6833 | initializers value will be set to zero. The initializer's kind | |
6834 | will be set to gfc_c_int_kind. | |
6835 | ||
6836 | If -fshort-enums is given, the appropriate kind will be selected | |
6837 | later after all enumerators have been parsed. A warning is issued | |
6838 | here if an initializer exceeds gfc_c_int_kind. */ | |
6839 | ||
6840 | static gfc_expr * | |
6841 | enum_initializer (gfc_expr *last_initializer, locus where) | |
6842 | { | |
6843 | gfc_expr *result; | |
6844 | ||
6845 | result = gfc_get_expr (); | |
6846 | result->expr_type = EXPR_CONSTANT; | |
6847 | result->ts.type = BT_INTEGER; | |
6848 | result->ts.kind = gfc_c_int_kind; | |
6849 | result->where = where; | |
6850 | ||
6851 | mpz_init (result->value.integer); | |
6852 | ||
6853 | if (last_initializer != NULL) | |
6854 | { | |
6855 | mpz_add_ui (result->value.integer, last_initializer->value.integer, 1); | |
6856 | result->where = last_initializer->where; | |
6857 | ||
6858 | if (gfc_check_integer_range (result->value.integer, | |
6859 | gfc_c_int_kind) != ARITH_OK) | |
6860 | { | |
6861 | gfc_error ("Enumerator exceeds the C integer type at %C"); | |
6862 | return NULL; | |
6863 | } | |
6864 | } | |
6865 | else | |
6866 | { | |
6867 | /* Control comes here, if it's the very first enumerator and no | |
6868 | initializer has been given. It will be initialized to zero. */ | |
6869 | mpz_set_si (result->value.integer, 0); | |
6870 | } | |
6871 | ||
6872 | return result; | |
6873 | } | |
6874 | ||
6875 | ||
6133c68a TS |
6876 | /* Match a variable name with an optional initializer. When this |
6877 | subroutine is called, a variable is expected to be parsed next. | |
6878 | Depending on what is happening at the moment, updates either the | |
6879 | symbol table or the current interface. */ | |
6880 | ||
6881 | static match | |
6882 | enumerator_decl (void) | |
6883 | { | |
6884 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6885 | gfc_expr *initializer; | |
6886 | gfc_array_spec *as = NULL; | |
6887 | gfc_symbol *sym; | |
6888 | locus var_locus; | |
6889 | match m; | |
17b1d2a0 | 6890 | gfc_try t; |
6133c68a TS |
6891 | locus old_locus; |
6892 | ||
6893 | initializer = NULL; | |
6894 | old_locus = gfc_current_locus; | |
6895 | ||
6896 | /* When we get here, we've just matched a list of attributes and | |
6897 | maybe a type and a double colon. The next thing we expect to see | |
6898 | is the name of the symbol. */ | |
6899 | m = gfc_match_name (name); | |
6900 | if (m != MATCH_YES) | |
6901 | goto cleanup; | |
6902 | ||
6903 | var_locus = gfc_current_locus; | |
6904 | ||
6905 | /* OK, we've successfully matched the declaration. Now put the | |
6906 | symbol in the current namespace. If we fail to create the symbol, | |
6907 | bail out. */ | |
6908 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
6909 | { | |
6910 | m = MATCH_ERROR; | |
6911 | goto cleanup; | |
6912 | } | |
6913 | ||
6914 | /* The double colon must be present in order to have initializers. | |
6915 | Otherwise the statement is ambiguous with an assignment statement. */ | |
6916 | if (colon_seen) | |
6917 | { | |
6918 | if (gfc_match_char ('=') == MATCH_YES) | |
6919 | { | |
6920 | m = gfc_match_init_expr (&initializer); | |
6921 | if (m == MATCH_NO) | |
6922 | { | |
6923 | gfc_error ("Expected an initialization expression at %C"); | |
6924 | m = MATCH_ERROR; | |
6925 | } | |
6926 | ||
6927 | if (m != MATCH_YES) | |
6928 | goto cleanup; | |
6929 | } | |
6930 | } | |
6931 | ||
6932 | /* If we do not have an initializer, the initialization value of the | |
6933 | previous enumerator (stored in last_initializer) is incremented | |
6934 | by 1 and is used to initialize the current enumerator. */ | |
6935 | if (initializer == NULL) | |
31224396 | 6936 | initializer = enum_initializer (last_initializer, old_locus); |
d51347f9 | 6937 | |
6133c68a TS |
6938 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
6939 | { | |
6940 | gfc_error("ENUMERATOR %L not initialized with integer expression", | |
6941 | &var_locus); | |
d51347f9 | 6942 | m = MATCH_ERROR; |
6133c68a TS |
6943 | gfc_free_enum_history (); |
6944 | goto cleanup; | |
6945 | } | |
6946 | ||
6947 | /* Store this current initializer, for the next enumerator variable | |
6948 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
6949 | use last_initializer below. */ | |
6950 | last_initializer = initializer; | |
6951 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
6952 | ||
6953 | /* Maintain enumerator history. */ | |
6954 | gfc_find_symbol (name, NULL, 0, &sym); | |
6955 | create_enum_history (sym, last_initializer); | |
6956 | ||
6957 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
6958 | ||
6959 | cleanup: | |
6960 | /* Free stuff up and return. */ | |
6961 | gfc_free_expr (initializer); | |
6962 | ||
6963 | return m; | |
6964 | } | |
6965 | ||
6966 | ||
66e4ab31 | 6967 | /* Match the enumerator definition statement. */ |
25d8f0a2 TS |
6968 | |
6969 | match | |
6970 | gfc_match_enumerator_def (void) | |
6971 | { | |
6972 | match m; | |
17b1d2a0 | 6973 | gfc_try t; |
d51347f9 | 6974 | |
25d8f0a2 | 6975 | gfc_clear_ts (¤t_ts); |
d51347f9 | 6976 | |
25d8f0a2 TS |
6977 | m = gfc_match (" enumerator"); |
6978 | if (m != MATCH_YES) | |
6979 | return m; | |
6133c68a TS |
6980 | |
6981 | m = gfc_match (" :: "); | |
6982 | if (m == MATCH_ERROR) | |
6983 | return m; | |
6984 | ||
6985 | colon_seen = (m == MATCH_YES); | |
d51347f9 | 6986 | |
25d8f0a2 TS |
6987 | if (gfc_current_state () != COMP_ENUM) |
6988 | { | |
6989 | gfc_error ("ENUM definition statement expected before %C"); | |
6990 | gfc_free_enum_history (); | |
6991 | return MATCH_ERROR; | |
6992 | } | |
6993 | ||
6994 | (¤t_ts)->type = BT_INTEGER; | |
6995 | (¤t_ts)->kind = gfc_c_int_kind; | |
d51347f9 | 6996 | |
6133c68a TS |
6997 | gfc_clear_attr (¤t_attr); |
6998 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
6999 | if (t == FAILURE) | |
25d8f0a2 | 7000 | { |
6133c68a | 7001 | m = MATCH_ERROR; |
25d8f0a2 TS |
7002 | goto cleanup; |
7003 | } | |
7004 | ||
25d8f0a2 TS |
7005 | for (;;) |
7006 | { | |
6133c68a | 7007 | m = enumerator_decl (); |
25d8f0a2 TS |
7008 | if (m == MATCH_ERROR) |
7009 | goto cleanup; | |
7010 | if (m == MATCH_NO) | |
7011 | break; | |
7012 | ||
7013 | if (gfc_match_eos () == MATCH_YES) | |
7014 | goto cleanup; | |
7015 | if (gfc_match_char (',') != MATCH_YES) | |
7016 | break; | |
7017 | } | |
7018 | ||
7019 | if (gfc_current_state () == COMP_ENUM) | |
7020 | { | |
7021 | gfc_free_enum_history (); | |
7022 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
7023 | m = MATCH_ERROR; | |
7024 | } | |
7025 | ||
7026 | cleanup: | |
7027 | gfc_free_array_spec (current_as); | |
7028 | current_as = NULL; | |
7029 | return m; | |
7030 | ||
7031 | } | |
7032 | ||
f6fad28e | 7033 | |
30b608eb DK |
7034 | /* Match binding attributes. */ |
7035 | ||
7036 | static match | |
713485cc | 7037 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc) |
30b608eb DK |
7038 | { |
7039 | bool found_passing = false; | |
713485cc | 7040 | bool seen_ptr = false; |
90661f26 | 7041 | match m = MATCH_YES; |
30b608eb DK |
7042 | |
7043 | /* Intialize to defaults. Do so even before the MATCH_NO check so that in | |
7044 | this case the defaults are in there. */ | |
7045 | ba->access = ACCESS_UNKNOWN; | |
7046 | ba->pass_arg = NULL; | |
7047 | ba->pass_arg_num = 0; | |
7048 | ba->nopass = 0; | |
7049 | ba->non_overridable = 0; | |
b0e5fa94 | 7050 | ba->deferred = 0; |
90661f26 | 7051 | ba->ppc = ppc; |
30b608eb DK |
7052 | |
7053 | /* If we find a comma, we believe there are binding attributes. */ | |
90661f26 JW |
7054 | m = gfc_match_char (','); |
7055 | if (m == MATCH_NO) | |
7056 | goto done; | |
30b608eb DK |
7057 | |
7058 | do | |
7059 | { | |
e157f736 DK |
7060 | /* Access specifier. */ |
7061 | ||
7062 | m = gfc_match (" public"); | |
30b608eb DK |
7063 | if (m == MATCH_ERROR) |
7064 | goto error; | |
7065 | if (m == MATCH_YES) | |
7066 | { | |
e157f736 | 7067 | if (ba->access != ACCESS_UNKNOWN) |
30b608eb | 7068 | { |
e157f736 | 7069 | gfc_error ("Duplicate access-specifier at %C"); |
30b608eb DK |
7070 | goto error; |
7071 | } | |
7072 | ||
e157f736 | 7073 | ba->access = ACCESS_PUBLIC; |
30b608eb DK |
7074 | continue; |
7075 | } | |
7076 | ||
e157f736 | 7077 | m = gfc_match (" private"); |
30b608eb DK |
7078 | if (m == MATCH_ERROR) |
7079 | goto error; | |
7080 | if (m == MATCH_YES) | |
7081 | { | |
e157f736 | 7082 | if (ba->access != ACCESS_UNKNOWN) |
30b608eb | 7083 | { |
e157f736 | 7084 | gfc_error ("Duplicate access-specifier at %C"); |
30b608eb DK |
7085 | goto error; |
7086 | } | |
7087 | ||
e157f736 | 7088 | ba->access = ACCESS_PRIVATE; |
30b608eb DK |
7089 | continue; |
7090 | } | |
7091 | ||
e157f736 DK |
7092 | /* If inside GENERIC, the following is not allowed. */ |
7093 | if (!generic) | |
30b608eb | 7094 | { |
30b608eb | 7095 | |
e157f736 DK |
7096 | /* NOPASS flag. */ |
7097 | m = gfc_match (" nopass"); | |
7098 | if (m == MATCH_ERROR) | |
7099 | goto error; | |
7100 | if (m == MATCH_YES) | |
30b608eb | 7101 | { |
e157f736 DK |
7102 | if (found_passing) |
7103 | { | |
7104 | gfc_error ("Binding attributes already specify passing," | |
7105 | " illegal NOPASS at %C"); | |
7106 | goto error; | |
7107 | } | |
7108 | ||
7109 | found_passing = true; | |
7110 | ba->nopass = 1; | |
7111 | continue; | |
30b608eb DK |
7112 | } |
7113 | ||
e157f736 DK |
7114 | /* PASS possibly including argument. */ |
7115 | m = gfc_match (" pass"); | |
7116 | if (m == MATCH_ERROR) | |
7117 | goto error; | |
7118 | if (m == MATCH_YES) | |
30b608eb | 7119 | { |
e157f736 DK |
7120 | char arg[GFC_MAX_SYMBOL_LEN + 1]; |
7121 | ||
7122 | if (found_passing) | |
7123 | { | |
7124 | gfc_error ("Binding attributes already specify passing," | |
7125 | " illegal PASS at %C"); | |
7126 | goto error; | |
7127 | } | |
7128 | ||
7129 | m = gfc_match (" ( %n )", arg); | |
7130 | if (m == MATCH_ERROR) | |
7131 | goto error; | |
7132 | if (m == MATCH_YES) | |
90661f26 | 7133 | ba->pass_arg = gfc_get_string (arg); |
e157f736 DK |
7134 | gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL)); |
7135 | ||
7136 | found_passing = true; | |
7137 | ba->nopass = 0; | |
7138 | continue; | |
30b608eb DK |
7139 | } |
7140 | ||
713485cc JW |
7141 | if (ppc) |
7142 | { | |
7143 | /* POINTER flag. */ | |
7144 | m = gfc_match (" pointer"); | |
7145 | if (m == MATCH_ERROR) | |
7146 | goto error; | |
7147 | if (m == MATCH_YES) | |
7148 | { | |
7149 | if (seen_ptr) | |
7150 | { | |
7151 | gfc_error ("Duplicate POINTER attribute at %C"); | |
7152 | goto error; | |
7153 | } | |
7154 | ||
7155 | seen_ptr = true; | |
713485cc JW |
7156 | continue; |
7157 | } | |
7158 | } | |
7159 | else | |
7160 | { | |
7161 | /* NON_OVERRIDABLE flag. */ | |
7162 | m = gfc_match (" non_overridable"); | |
7163 | if (m == MATCH_ERROR) | |
7164 | goto error; | |
7165 | if (m == MATCH_YES) | |
7166 | { | |
7167 | if (ba->non_overridable) | |
7168 | { | |
7169 | gfc_error ("Duplicate NON_OVERRIDABLE at %C"); | |
7170 | goto error; | |
7171 | } | |
7172 | ||
7173 | ba->non_overridable = 1; | |
7174 | continue; | |
7175 | } | |
7176 | ||
7177 | /* DEFERRED flag. */ | |
7178 | m = gfc_match (" deferred"); | |
7179 | if (m == MATCH_ERROR) | |
7180 | goto error; | |
7181 | if (m == MATCH_YES) | |
7182 | { | |
7183 | if (ba->deferred) | |
7184 | { | |
7185 | gfc_error ("Duplicate DEFERRED at %C"); | |
7186 | goto error; | |
7187 | } | |
7188 | ||
7189 | ba->deferred = 1; | |
7190 | continue; | |
7191 | } | |
7192 | } | |
7193 | ||
30b608eb DK |
7194 | } |
7195 | ||
7196 | /* Nothing matching found. */ | |
e157f736 DK |
7197 | if (generic) |
7198 | gfc_error ("Expected access-specifier at %C"); | |
7199 | else | |
7200 | gfc_error ("Expected binding attribute at %C"); | |
30b608eb DK |
7201 | goto error; |
7202 | } | |
7203 | while (gfc_match_char (',') == MATCH_YES); | |
7204 | ||
b0e5fa94 DK |
7205 | /* NON_OVERRIDABLE and DEFERRED exclude themselves. */ |
7206 | if (ba->non_overridable && ba->deferred) | |
7207 | { | |
7208 | gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C"); | |
7209 | goto error; | |
7210 | } | |
7211 | ||
90661f26 JW |
7212 | m = MATCH_YES; |
7213 | ||
7214 | done: | |
e157f736 DK |
7215 | if (ba->access == ACCESS_UNKNOWN) |
7216 | ba->access = gfc_typebound_default_access; | |
7217 | ||
713485cc JW |
7218 | if (ppc && !seen_ptr) |
7219 | { | |
7220 | gfc_error ("POINTER attribute is required for procedure pointer component" | |
7221 | " at %C"); | |
7222 | goto error; | |
7223 | } | |
7224 | ||
90661f26 | 7225 | return m; |
30b608eb DK |
7226 | |
7227 | error: | |
30b608eb DK |
7228 | return MATCH_ERROR; |
7229 | } | |
7230 | ||
7231 | ||
7232 | /* Match a PROCEDURE specific binding inside a derived type. */ | |
7233 | ||
7234 | static match | |
7235 | match_procedure_in_type (void) | |
7236 | { | |
7237 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7238 | char target_buf[GFC_MAX_SYMBOL_LEN + 1]; | |
b0e5fa94 | 7239 | char* target = NULL; |
30b608eb DK |
7240 | gfc_typebound_proc* tb; |
7241 | bool seen_colons; | |
7242 | bool seen_attrs; | |
7243 | match m; | |
7244 | gfc_symtree* stree; | |
7245 | gfc_namespace* ns; | |
7246 | gfc_symbol* block; | |
7247 | ||
7248 | /* Check current state. */ | |
7249 | gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS); | |
7250 | block = gfc_state_stack->previous->sym; | |
7251 | gcc_assert (block); | |
7252 | ||
b0e5fa94 | 7253 | /* Try to match PROCEDURE(interface). */ |
30b608eb DK |
7254 | if (gfc_match (" (") == MATCH_YES) |
7255 | { | |
b0e5fa94 DK |
7256 | m = gfc_match_name (target_buf); |
7257 | if (m == MATCH_ERROR) | |
7258 | return m; | |
7259 | if (m != MATCH_YES) | |
7260 | { | |
7261 | gfc_error ("Interface-name expected after '(' at %C"); | |
7262 | return MATCH_ERROR; | |
7263 | } | |
7264 | ||
7265 | if (gfc_match (" )") != MATCH_YES) | |
7266 | { | |
7267 | gfc_error ("')' expected at %C"); | |
7268 | return MATCH_ERROR; | |
7269 | } | |
7270 | ||
7271 | target = target_buf; | |
30b608eb DK |
7272 | } |
7273 | ||
7274 | /* Construct the data structure. */ | |
8e1f752a | 7275 | tb = gfc_get_typebound_proc (); |
30b608eb | 7276 | tb->where = gfc_current_locus; |
e157f736 | 7277 | tb->is_generic = 0; |
30b608eb DK |
7278 | |
7279 | /* Match binding attributes. */ | |
713485cc | 7280 | m = match_binding_attributes (tb, false, false); |
30b608eb DK |
7281 | if (m == MATCH_ERROR) |
7282 | return m; | |
7283 | seen_attrs = (m == MATCH_YES); | |
7284 | ||
b0e5fa94 DK |
7285 | /* Check that attribute DEFERRED is given iff an interface is specified, which |
7286 | means target != NULL. */ | |
7287 | if (tb->deferred && !target) | |
7288 | { | |
7289 | gfc_error ("Interface must be specified for DEFERRED binding at %C"); | |
7290 | return MATCH_ERROR; | |
7291 | } | |
7292 | if (target && !tb->deferred) | |
7293 | { | |
7294 | gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED"); | |
7295 | return MATCH_ERROR; | |
7296 | } | |
7297 | ||
30b608eb DK |
7298 | /* Match the colons. */ |
7299 | m = gfc_match (" ::"); | |
7300 | if (m == MATCH_ERROR) | |
7301 | return m; | |
7302 | seen_colons = (m == MATCH_YES); | |
7303 | if (seen_attrs && !seen_colons) | |
7304 | { | |
7305 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
7306 | return MATCH_ERROR; | |
7307 | } | |
7308 | ||
7309 | /* Match the binding name. */ | |
7310 | m = gfc_match_name (name); | |
7311 | if (m == MATCH_ERROR) | |
7312 | return m; | |
7313 | if (m == MATCH_NO) | |
7314 | { | |
7315 | gfc_error ("Expected binding name at %C"); | |
7316 | return MATCH_ERROR; | |
7317 | } | |
7318 | ||
7319 | /* Try to match the '=> target', if it's there. */ | |
30b608eb DK |
7320 | m = gfc_match (" =>"); |
7321 | if (m == MATCH_ERROR) | |
7322 | return m; | |
7323 | if (m == MATCH_YES) | |
7324 | { | |
b0e5fa94 DK |
7325 | if (tb->deferred) |
7326 | { | |
7327 | gfc_error ("'=> target' is invalid for DEFERRED binding at %C"); | |
7328 | return MATCH_ERROR; | |
7329 | } | |
7330 | ||
30b608eb DK |
7331 | if (!seen_colons) |
7332 | { | |
7333 | gfc_error ("'::' needed in PROCEDURE binding with explicit target" | |
7334 | " at %C"); | |
7335 | return MATCH_ERROR; | |
7336 | } | |
7337 | ||
7338 | m = gfc_match_name (target_buf); | |
7339 | if (m == MATCH_ERROR) | |
7340 | return m; | |
7341 | if (m == MATCH_NO) | |
7342 | { | |
7343 | gfc_error ("Expected binding target after '=>' at %C"); | |
7344 | return MATCH_ERROR; | |
7345 | } | |
7346 | target = target_buf; | |
7347 | } | |
7348 | ||
7349 | /* Now we should have the end. */ | |
7350 | m = gfc_match_eos (); | |
7351 | if (m == MATCH_ERROR) | |
7352 | return m; | |
7353 | if (m == MATCH_NO) | |
7354 | { | |
7355 | gfc_error ("Junk after PROCEDURE declaration at %C"); | |
7356 | return MATCH_ERROR; | |
7357 | } | |
7358 | ||
7359 | /* If no target was found, it has the same name as the binding. */ | |
7360 | if (!target) | |
7361 | target = name; | |
7362 | ||
7363 | /* Get the namespace to insert the symbols into. */ | |
7364 | ns = block->f2k_derived; | |
7365 | gcc_assert (ns); | |
7366 | ||
b0e5fa94 DK |
7367 | /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */ |
7368 | if (tb->deferred && !block->attr.abstract) | |
7369 | { | |
7370 | gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT", | |
7371 | block->name); | |
7372 | return MATCH_ERROR; | |
7373 | } | |
7374 | ||
30b608eb | 7375 | /* See if we already have a binding with this name in the symtree which would |
e157f736 DK |
7376 | be an error. If a GENERIC already targetted this binding, it may be |
7377 | already there but then typebound is still NULL. */ | |
e34ccb4c DK |
7378 | stree = gfc_find_symtree (ns->tb_sym_root, name); |
7379 | if (stree && stree->n.tb) | |
30b608eb DK |
7380 | { |
7381 | gfc_error ("There's already a procedure with binding name '%s' for the" | |
7382 | " derived type '%s' at %C", name, block->name); | |
7383 | return MATCH_ERROR; | |
7384 | } | |
7385 | ||
7386 | /* Insert it and set attributes. */ | |
e34ccb4c DK |
7387 | |
7388 | if (!stree) | |
7389 | { | |
7390 | stree = gfc_new_symtree (&ns->tb_sym_root, name); | |
7391 | gcc_assert (stree); | |
7392 | } | |
7393 | stree->n.tb = tb; | |
7394 | ||
08a6b8e0 | 7395 | if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific, false)) |
30b608eb | 7396 | return MATCH_ERROR; |
e157f736 | 7397 | gfc_set_sym_referenced (tb->u.specific->n.sym); |
30b608eb DK |
7398 | |
7399 | return MATCH_YES; | |
7400 | } | |
7401 | ||
7402 | ||
e157f736 DK |
7403 | /* Match a GENERIC procedure binding inside a derived type. */ |
7404 | ||
7405 | match | |
7406 | gfc_match_generic (void) | |
7407 | { | |
7408 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7409 | gfc_symbol* block; | |
7410 | gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */ | |
7411 | gfc_typebound_proc* tb; | |
7412 | gfc_symtree* st; | |
7413 | gfc_namespace* ns; | |
7414 | match m; | |
7415 | ||
7416 | /* Check current state. */ | |
7417 | if (gfc_current_state () == COMP_DERIVED) | |
7418 | { | |
7419 | gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS"); | |
7420 | return MATCH_ERROR; | |
7421 | } | |
7422 | if (gfc_current_state () != COMP_DERIVED_CONTAINS) | |
7423 | return MATCH_NO; | |
7424 | block = gfc_state_stack->previous->sym; | |
7425 | ns = block->f2k_derived; | |
7426 | gcc_assert (block && ns); | |
7427 | ||
7428 | /* See if we get an access-specifier. */ | |
713485cc | 7429 | m = match_binding_attributes (&tbattr, true, false); |
e157f736 DK |
7430 | if (m == MATCH_ERROR) |
7431 | goto error; | |
7432 | ||
7433 | /* Now the colons, those are required. */ | |
7434 | if (gfc_match (" ::") != MATCH_YES) | |
7435 | { | |
7436 | gfc_error ("Expected '::' at %C"); | |
7437 | goto error; | |
7438 | } | |
7439 | ||
7440 | /* The binding name and =>. */ | |
7441 | m = gfc_match (" %n =>", name); | |
7442 | if (m == MATCH_ERROR) | |
7443 | return MATCH_ERROR; | |
7444 | if (m == MATCH_NO) | |
7445 | { | |
7446 | gfc_error ("Expected generic name at %C"); | |
7447 | goto error; | |
7448 | } | |
7449 | ||
7450 | /* If there's already something with this name, check that it is another | |
7451 | GENERIC and then extend that rather than build a new node. */ | |
e34ccb4c | 7452 | st = gfc_find_symtree (ns->tb_sym_root, name); |
e157f736 DK |
7453 | if (st) |
7454 | { | |
e34ccb4c DK |
7455 | gcc_assert (st->n.tb); |
7456 | tb = st->n.tb; | |
7457 | ||
7458 | if (!tb->is_generic) | |
e157f736 DK |
7459 | { |
7460 | gfc_error ("There's already a non-generic procedure with binding name" | |
7461 | " '%s' for the derived type '%s' at %C", | |
7462 | name, block->name); | |
7463 | goto error; | |
7464 | } | |
7465 | ||
e157f736 DK |
7466 | if (tb->access != tbattr.access) |
7467 | { | |
7468 | gfc_error ("Binding at %C must have the same access as already" | |
7469 | " defined binding '%s'", name); | |
7470 | goto error; | |
7471 | } | |
7472 | } | |
7473 | else | |
7474 | { | |
e34ccb4c DK |
7475 | st = gfc_new_symtree (&ns->tb_sym_root, name); |
7476 | gcc_assert (st); | |
e157f736 | 7477 | |
e34ccb4c | 7478 | st->n.tb = tb = gfc_get_typebound_proc (); |
e157f736 DK |
7479 | tb->where = gfc_current_locus; |
7480 | tb->access = tbattr.access; | |
7481 | tb->is_generic = 1; | |
7482 | tb->u.generic = NULL; | |
7483 | } | |
7484 | ||
7485 | /* Now, match all following names as specific targets. */ | |
7486 | do | |
7487 | { | |
7488 | gfc_symtree* target_st; | |
7489 | gfc_tbp_generic* target; | |
7490 | ||
7491 | m = gfc_match_name (name); | |
7492 | if (m == MATCH_ERROR) | |
7493 | goto error; | |
7494 | if (m == MATCH_NO) | |
7495 | { | |
7496 | gfc_error ("Expected specific binding name at %C"); | |
7497 | goto error; | |
7498 | } | |
7499 | ||
e34ccb4c | 7500 | target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name); |
e157f736 DK |
7501 | |
7502 | /* See if this is a duplicate specification. */ | |
7503 | for (target = tb->u.generic; target; target = target->next) | |
7504 | if (target_st == target->specific_st) | |
7505 | { | |
7506 | gfc_error ("'%s' already defined as specific binding for the" | |
e34ccb4c | 7507 | " generic '%s' at %C", name, st->name); |
e157f736 DK |
7508 | goto error; |
7509 | } | |
7510 | ||
e157f736 DK |
7511 | target = gfc_get_tbp_generic (); |
7512 | target->specific_st = target_st; | |
7513 | target->specific = NULL; | |
7514 | target->next = tb->u.generic; | |
7515 | tb->u.generic = target; | |
7516 | } | |
7517 | while (gfc_match (" ,") == MATCH_YES); | |
7518 | ||
7519 | /* Here should be the end. */ | |
7520 | if (gfc_match_eos () != MATCH_YES) | |
7521 | { | |
7522 | gfc_error ("Junk after GENERIC binding at %C"); | |
7523 | goto error; | |
7524 | } | |
7525 | ||
7526 | return MATCH_YES; | |
7527 | ||
7528 | error: | |
7529 | return MATCH_ERROR; | |
7530 | } | |
7531 | ||
7532 | ||
34523524 DK |
7533 | /* Match a FINAL declaration inside a derived type. */ |
7534 | ||
7535 | match | |
7536 | gfc_match_final_decl (void) | |
7537 | { | |
7538 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7539 | gfc_symbol* sym; | |
7540 | match m; | |
7541 | gfc_namespace* module_ns; | |
7542 | bool first, last; | |
30b608eb | 7543 | gfc_symbol* block; |
34523524 | 7544 | |
30b608eb | 7545 | if (gfc_state_stack->state != COMP_DERIVED_CONTAINS) |
34523524 DK |
7546 | { |
7547 | gfc_error ("FINAL declaration at %C must be inside a derived type " | |
30b608eb | 7548 | "CONTAINS section"); |
34523524 DK |
7549 | return MATCH_ERROR; |
7550 | } | |
7551 | ||
30b608eb DK |
7552 | block = gfc_state_stack->previous->sym; |
7553 | gcc_assert (block); | |
34523524 | 7554 | |
30b608eb DK |
7555 | if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous |
7556 | || gfc_state_stack->previous->previous->state != COMP_MODULE) | |
34523524 DK |
7557 | { |
7558 | gfc_error ("Derived type declaration with FINAL at %C must be in the" | |
7559 | " specification part of a MODULE"); | |
7560 | return MATCH_ERROR; | |
7561 | } | |
7562 | ||
7563 | module_ns = gfc_current_ns; | |
7564 | gcc_assert (module_ns); | |
7565 | gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE); | |
7566 | ||
7567 | /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */ | |
7568 | if (gfc_match (" ::") == MATCH_ERROR) | |
7569 | return MATCH_ERROR; | |
7570 | ||
7571 | /* Match the sequence of procedure names. */ | |
7572 | first = true; | |
7573 | last = false; | |
7574 | do | |
7575 | { | |
7576 | gfc_finalizer* f; | |
7577 | ||
7578 | if (first && gfc_match_eos () == MATCH_YES) | |
7579 | { | |
7580 | gfc_error ("Empty FINAL at %C"); | |
7581 | return MATCH_ERROR; | |
7582 | } | |
7583 | ||
7584 | m = gfc_match_name (name); | |
7585 | if (m == MATCH_NO) | |
7586 | { | |
7587 | gfc_error ("Expected module procedure name at %C"); | |
7588 | return MATCH_ERROR; | |
7589 | } | |
7590 | else if (m != MATCH_YES) | |
7591 | return MATCH_ERROR; | |
7592 | ||
7593 | if (gfc_match_eos () == MATCH_YES) | |
7594 | last = true; | |
7595 | if (!last && gfc_match_char (',') != MATCH_YES) | |
7596 | { | |
7597 | gfc_error ("Expected ',' at %C"); | |
7598 | return MATCH_ERROR; | |
7599 | } | |
7600 | ||
7601 | if (gfc_get_symbol (name, module_ns, &sym)) | |
7602 | { | |
7603 | gfc_error ("Unknown procedure name \"%s\" at %C", name); | |
7604 | return MATCH_ERROR; | |
7605 | } | |
7606 | ||
7607 | /* Mark the symbol as module procedure. */ | |
7608 | if (sym->attr.proc != PROC_MODULE | |
7609 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
7610 | sym->name, NULL) == FAILURE) | |
7611 | return MATCH_ERROR; | |
7612 | ||
7613 | /* Check if we already have this symbol in the list, this is an error. */ | |
30b608eb | 7614 | for (f = block->f2k_derived->finalizers; f; f = f->next) |
f6fad28e | 7615 | if (f->proc_sym == sym) |
34523524 DK |
7616 | { |
7617 | gfc_error ("'%s' at %C is already defined as FINAL procedure!", | |
7618 | name); | |
7619 | return MATCH_ERROR; | |
7620 | } | |
7621 | ||
7622 | /* Add this symbol to the list of finalizers. */ | |
30b608eb | 7623 | gcc_assert (block->f2k_derived); |
34523524 | 7624 | ++sym->refs; |
ece3f663 | 7625 | f = XCNEW (gfc_finalizer); |
f6fad28e DK |
7626 | f->proc_sym = sym; |
7627 | f->proc_tree = NULL; | |
34523524 | 7628 | f->where = gfc_current_locus; |
30b608eb DK |
7629 | f->next = block->f2k_derived->finalizers; |
7630 | block->f2k_derived->finalizers = f; | |
34523524 DK |
7631 | |
7632 | first = false; | |
7633 | } | |
7634 | while (!last); | |
7635 | ||
7636 | return MATCH_YES; | |
7637 | } | |
08a6b8e0 TB |
7638 | |
7639 | ||
7640 | const ext_attr_t ext_attr_list[] = { | |
7641 | { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" }, | |
7642 | { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" }, | |
7643 | { "cdecl", EXT_ATTR_CDECL, "cdecl" }, | |
7644 | { "stdcall", EXT_ATTR_STDCALL, "stdcall" }, | |
7645 | { "fastcall", EXT_ATTR_FASTCALL, "fastcall" }, | |
7646 | { NULL, EXT_ATTR_LAST, NULL } | |
7647 | }; | |
7648 | ||
7649 | /* Match a !GCC$ ATTRIBUTES statement of the form: | |
7650 | !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ... | |
7651 | When we come here, we have already matched the !GCC$ ATTRIBUTES string. | |
7652 | ||
7653 | TODO: We should support all GCC attributes using the same syntax for | |
7654 | the attribute list, i.e. the list in C | |
7655 | __attributes(( attribute-list )) | |
7656 | matches then | |
7657 | !GCC$ ATTRIBUTES attribute-list :: | |
7658 | Cf. c-parser.c's c_parser_attributes; the data can then directly be | |
7659 | saved into a TREE. | |
7660 | ||
7661 | As there is absolutely no risk of confusion, we should never return | |
7662 | MATCH_NO. */ | |
7663 | match | |
7664 | gfc_match_gcc_attributes (void) | |
7665 | { | |
7666 | symbol_attribute attr; | |
7667 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7668 | unsigned id; | |
7669 | gfc_symbol *sym; | |
7670 | match m; | |
7671 | ||
7672 | gfc_clear_attr (&attr); | |
7673 | for(;;) | |
7674 | { | |
7675 | char ch; | |
7676 | ||
7677 | if (gfc_match_name (name) != MATCH_YES) | |
7678 | return MATCH_ERROR; | |
7679 | ||
7680 | for (id = 0; id < EXT_ATTR_LAST; id++) | |
7681 | if (strcmp (name, ext_attr_list[id].name) == 0) | |
7682 | break; | |
7683 | ||
7684 | if (id == EXT_ATTR_LAST) | |
7685 | { | |
7686 | gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C"); | |
7687 | return MATCH_ERROR; | |
7688 | } | |
7689 | ||
2b374f55 | 7690 | if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus) |
08a6b8e0 TB |
7691 | == FAILURE) |
7692 | return MATCH_ERROR; | |
7693 | ||
7694 | gfc_gobble_whitespace (); | |
7695 | ch = gfc_next_ascii_char (); | |
7696 | if (ch == ':') | |
7697 | { | |
7698 | /* This is the successful exit condition for the loop. */ | |
7699 | if (gfc_next_ascii_char () == ':') | |
7700 | break; | |
7701 | } | |
7702 | ||
7703 | if (ch == ',') | |
7704 | continue; | |
7705 | ||
7706 | goto syntax; | |
7707 | } | |
7708 | ||
7709 | if (gfc_match_eos () == MATCH_YES) | |
7710 | goto syntax; | |
7711 | ||
7712 | for(;;) | |
7713 | { | |
7714 | m = gfc_match_name (name); | |
7715 | if (m != MATCH_YES) | |
7716 | return m; | |
7717 | ||
7718 | if (find_special (name, &sym, true)) | |
7719 | return MATCH_ERROR; | |
7720 | ||
7721 | sym->attr.ext_attr |= attr.ext_attr; | |
7722 | ||
7723 | if (gfc_match_eos () == MATCH_YES) | |
7724 | break; | |
7725 | ||
7726 | if (gfc_match_char (',') != MATCH_YES) | |
7727 | goto syntax; | |
7728 | } | |
7729 | ||
7730 | return MATCH_YES; | |
7731 | ||
7732 | syntax: | |
7733 | gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C"); | |
7734 | return MATCH_ERROR; | |
7735 | } |