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Commit | Line | Data |
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6de9cd9a | 1 | /* Declaration statement matcher |
636dff67 SK |
2 | Copyright (C) 2002, 2004, 2005, 2006, 2007 |
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" | |
6de9cd9a | 27 | |
ca39e6f2 FXC |
28 | |
29 | /* Macros to access allocate memory for gfc_data_variable, | |
30 | gfc_data_value and gfc_data. */ | |
31 | #define gfc_get_data_variable() gfc_getmem (sizeof (gfc_data_variable)) | |
32 | #define gfc_get_data_value() gfc_getmem (sizeof (gfc_data_value)) | |
33 | #define gfc_get_data() gfc_getmem( sizeof (gfc_data)) | |
34 | ||
35 | ||
2054fc29 | 36 | /* This flag is set if an old-style length selector is matched |
6de9cd9a DN |
37 | during a type-declaration statement. */ |
38 | ||
39 | static int old_char_selector; | |
40 | ||
46fa431d | 41 | /* When variables acquire types and attributes from a declaration |
6de9cd9a DN |
42 | statement, they get them from the following static variables. The |
43 | first part of a declaration sets these variables and the second | |
44 | part copies these into symbol structures. */ | |
45 | ||
46 | static gfc_typespec current_ts; | |
47 | ||
48 | static symbol_attribute current_attr; | |
49 | static gfc_array_spec *current_as; | |
50 | static int colon_seen; | |
51 | ||
a8b3b0b6 CR |
52 | /* The current binding label (if any). */ |
53 | static char curr_binding_label[GFC_MAX_BINDING_LABEL_LEN + 1]; | |
54 | /* Need to know how many identifiers are on the current data declaration | |
55 | line in case we're given the BIND(C) attribute with a NAME= specifier. */ | |
56 | static int num_idents_on_line; | |
57 | /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we | |
58 | can supply a name if the curr_binding_label is nil and NAME= was not. */ | |
59 | static int has_name_equals = 0; | |
60 | ||
25d8f0a2 TS |
61 | /* Initializer of the previous enumerator. */ |
62 | ||
63 | static gfc_expr *last_initializer; | |
64 | ||
65 | /* History of all the enumerators is maintained, so that | |
66 | kind values of all the enumerators could be updated depending | |
67 | upon the maximum initialized value. */ | |
68 | ||
69 | typedef struct enumerator_history | |
70 | { | |
71 | gfc_symbol *sym; | |
72 | gfc_expr *initializer; | |
73 | struct enumerator_history *next; | |
74 | } | |
75 | enumerator_history; | |
76 | ||
77 | /* Header of enum history chain. */ | |
78 | ||
79 | static enumerator_history *enum_history = NULL; | |
80 | ||
81 | /* Pointer of enum history node containing largest initializer. */ | |
82 | ||
83 | static enumerator_history *max_enum = NULL; | |
84 | ||
6de9cd9a DN |
85 | /* gfc_new_block points to the symbol of a newly matched block. */ |
86 | ||
87 | gfc_symbol *gfc_new_block; | |
88 | ||
e2d29968 PT |
89 | locus gfc_function_kind_locus; |
90 | locus gfc_function_type_locus; | |
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 | |
636dff67 | 235 | var_element (gfc_data_variable *new) |
294fbfc8 TS |
236 | { |
237 | match m; | |
238 | gfc_symbol *sym; | |
239 | ||
240 | memset (new, 0, sizeof (gfc_data_variable)); | |
241 | ||
242 | if (gfc_match_char ('(') == MATCH_YES) | |
243 | return var_list (new); | |
244 | ||
245 | m = gfc_match_variable (&new->expr, 0); | |
246 | if (m != MATCH_YES) | |
247 | return m; | |
248 | ||
249 | sym = new->expr->symtree->n.sym; | |
250 | ||
636dff67 SK |
251 | if (!sym->attr.function && gfc_current_ns->parent |
252 | && gfc_current_ns->parent == sym->ns) | |
294fbfc8 | 253 | { |
4075a94e | 254 | gfc_error ("Host associated variable '%s' may not be in the DATA " |
e25a0da3 | 255 | "statement at %C", sym->name); |
294fbfc8 TS |
256 | return MATCH_ERROR; |
257 | } | |
258 | ||
4075a94e | 259 | if (gfc_current_state () != COMP_BLOCK_DATA |
636dff67 SK |
260 | && sym->attr.in_common |
261 | && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of " | |
262 | "common block variable '%s' in DATA statement at %C", | |
263 | sym->name) == FAILURE) | |
4075a94e | 264 | return MATCH_ERROR; |
294fbfc8 | 265 | |
231b2fcc | 266 | if (gfc_add_data (&sym->attr, sym->name, &new->expr->where) == FAILURE) |
294fbfc8 TS |
267 | return MATCH_ERROR; |
268 | ||
269 | return MATCH_YES; | |
270 | } | |
271 | ||
272 | ||
273 | /* Match the top-level list of data variables. */ | |
274 | ||
275 | static match | |
636dff67 | 276 | top_var_list (gfc_data *d) |
294fbfc8 TS |
277 | { |
278 | gfc_data_variable var, *tail, *new; | |
279 | match m; | |
280 | ||
281 | tail = NULL; | |
282 | ||
283 | for (;;) | |
284 | { | |
285 | m = var_element (&var); | |
286 | if (m == MATCH_NO) | |
287 | goto syntax; | |
288 | if (m == MATCH_ERROR) | |
289 | return MATCH_ERROR; | |
290 | ||
291 | new = gfc_get_data_variable (); | |
292 | *new = var; | |
293 | ||
294 | if (tail == NULL) | |
295 | d->var = new; | |
296 | else | |
297 | tail->next = new; | |
298 | ||
299 | tail = new; | |
300 | ||
301 | if (gfc_match_char ('/') == MATCH_YES) | |
302 | break; | |
303 | if (gfc_match_char (',') != MATCH_YES) | |
304 | goto syntax; | |
305 | } | |
306 | ||
307 | return MATCH_YES; | |
308 | ||
309 | syntax: | |
310 | gfc_syntax_error (ST_DATA); | |
a9f6f1f2 | 311 | gfc_free_data_all (gfc_current_ns); |
294fbfc8 TS |
312 | return MATCH_ERROR; |
313 | } | |
314 | ||
315 | ||
316 | static match | |
636dff67 | 317 | match_data_constant (gfc_expr **result) |
294fbfc8 TS |
318 | { |
319 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
320 | gfc_symbol *sym; | |
321 | gfc_expr *expr; | |
322 | match m; | |
36d3fb4c | 323 | locus old_loc; |
294fbfc8 TS |
324 | |
325 | m = gfc_match_literal_constant (&expr, 1); | |
326 | if (m == MATCH_YES) | |
327 | { | |
328 | *result = expr; | |
329 | return MATCH_YES; | |
330 | } | |
331 | ||
332 | if (m == MATCH_ERROR) | |
333 | return MATCH_ERROR; | |
334 | ||
335 | m = gfc_match_null (result); | |
336 | if (m != MATCH_NO) | |
337 | return m; | |
338 | ||
36d3fb4c PT |
339 | old_loc = gfc_current_locus; |
340 | ||
341 | /* Should this be a structure component, try to match it | |
342 | before matching a name. */ | |
343 | m = gfc_match_rvalue (result); | |
344 | if (m == MATCH_ERROR) | |
345 | return m; | |
346 | ||
347 | if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE) | |
348 | { | |
349 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
350 | m = MATCH_ERROR; | |
351 | return m; | |
352 | } | |
353 | ||
354 | gfc_current_locus = old_loc; | |
355 | ||
294fbfc8 TS |
356 | m = gfc_match_name (name); |
357 | if (m != MATCH_YES) | |
358 | return m; | |
359 | ||
360 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
361 | return MATCH_ERROR; | |
362 | ||
363 | if (sym == NULL | |
364 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
365 | { | |
366 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
367 | name); | |
368 | return MATCH_ERROR; | |
369 | } | |
370 | else if (sym->attr.flavor == FL_DERIVED) | |
371 | return gfc_match_structure_constructor (sym, result); | |
372 | ||
d46e0870 JD |
373 | /* Check to see if the value is an initialization array expression. */ |
374 | if (sym->value->expr_type == EXPR_ARRAY) | |
375 | { | |
376 | gfc_current_locus = old_loc; | |
377 | ||
378 | m = gfc_match_init_expr (result); | |
379 | if (m == MATCH_ERROR) | |
380 | return m; | |
381 | ||
382 | if (m == MATCH_YES) | |
383 | { | |
384 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
385 | m = MATCH_ERROR; | |
386 | ||
387 | if ((*result)->expr_type == EXPR_CONSTANT) | |
388 | return m; | |
389 | else | |
390 | { | |
391 | gfc_error ("Invalid initializer %s in Data statement at %C", name); | |
392 | return MATCH_ERROR; | |
393 | } | |
394 | } | |
395 | } | |
396 | ||
294fbfc8 TS |
397 | *result = gfc_copy_expr (sym->value); |
398 | return MATCH_YES; | |
399 | } | |
400 | ||
401 | ||
402 | /* Match a list of values in a DATA statement. The leading '/' has | |
403 | already been seen at this point. */ | |
404 | ||
405 | static match | |
636dff67 | 406 | top_val_list (gfc_data *data) |
294fbfc8 TS |
407 | { |
408 | gfc_data_value *new, *tail; | |
409 | gfc_expr *expr; | |
294fbfc8 TS |
410 | match m; |
411 | ||
412 | tail = NULL; | |
413 | ||
414 | for (;;) | |
415 | { | |
416 | m = match_data_constant (&expr); | |
417 | if (m == MATCH_NO) | |
418 | goto syntax; | |
419 | if (m == MATCH_ERROR) | |
420 | return MATCH_ERROR; | |
421 | ||
422 | new = gfc_get_data_value (); | |
f2112868 | 423 | mpz_init (new->repeat); |
294fbfc8 TS |
424 | |
425 | if (tail == NULL) | |
426 | data->value = new; | |
427 | else | |
428 | tail->next = new; | |
429 | ||
430 | tail = new; | |
431 | ||
432 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
433 | { | |
434 | tail->expr = expr; | |
f2112868 | 435 | mpz_set_ui (tail->repeat, 1); |
294fbfc8 TS |
436 | } |
437 | else | |
438 | { | |
f2112868 SK |
439 | if (expr->ts.type == BT_INTEGER) |
440 | mpz_set (tail->repeat, expr->value.integer); | |
294fbfc8 | 441 | gfc_free_expr (expr); |
294fbfc8 TS |
442 | |
443 | m = match_data_constant (&tail->expr); | |
444 | if (m == MATCH_NO) | |
445 | goto syntax; | |
446 | if (m == MATCH_ERROR) | |
447 | return MATCH_ERROR; | |
448 | } | |
449 | ||
450 | if (gfc_match_char ('/') == MATCH_YES) | |
451 | break; | |
452 | if (gfc_match_char (',') == MATCH_NO) | |
453 | goto syntax; | |
454 | } | |
455 | ||
456 | return MATCH_YES; | |
457 | ||
458 | syntax: | |
459 | gfc_syntax_error (ST_DATA); | |
a9f6f1f2 | 460 | gfc_free_data_all (gfc_current_ns); |
294fbfc8 TS |
461 | return MATCH_ERROR; |
462 | } | |
463 | ||
464 | ||
465 | /* Matches an old style initialization. */ | |
466 | ||
467 | static match | |
468 | match_old_style_init (const char *name) | |
469 | { | |
470 | match m; | |
471 | gfc_symtree *st; | |
ed0e3607 | 472 | gfc_symbol *sym; |
294fbfc8 TS |
473 | gfc_data *newdata; |
474 | ||
475 | /* Set up data structure to hold initializers. */ | |
476 | gfc_find_sym_tree (name, NULL, 0, &st); | |
ed0e3607 AL |
477 | sym = st->n.sym; |
478 | ||
294fbfc8 TS |
479 | newdata = gfc_get_data (); |
480 | newdata->var = gfc_get_data_variable (); | |
481 | newdata->var->expr = gfc_get_variable_expr (st); | |
8c5c0b80 | 482 | newdata->where = gfc_current_locus; |
294fbfc8 | 483 | |
66e4ab31 | 484 | /* Match initial value list. This also eats the terminal '/'. */ |
294fbfc8 TS |
485 | m = top_val_list (newdata); |
486 | if (m != MATCH_YES) | |
487 | { | |
488 | gfc_free (newdata); | |
489 | return m; | |
490 | } | |
491 | ||
492 | if (gfc_pure (NULL)) | |
493 | { | |
494 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
495 | gfc_free (newdata); | |
496 | return MATCH_ERROR; | |
497 | } | |
498 | ||
ed0e3607 AL |
499 | /* Mark the variable as having appeared in a data statement. */ |
500 | if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) | |
501 | { | |
502 | gfc_free (newdata); | |
503 | return MATCH_ERROR; | |
504 | } | |
505 | ||
294fbfc8 TS |
506 | /* Chain in namespace list of DATA initializers. */ |
507 | newdata->next = gfc_current_ns->data; | |
508 | gfc_current_ns->data = newdata; | |
509 | ||
510 | return m; | |
511 | } | |
512 | ||
636dff67 | 513 | |
294fbfc8 | 514 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
13795658 | 515 | we are matching a DATA statement and are therefore issuing an error |
d51347f9 | 516 | if we encounter something unexpected, if not, we're trying to match |
69de3b83 | 517 | an old-style initialization expression of the form INTEGER I /2/. */ |
294fbfc8 TS |
518 | |
519 | match | |
520 | gfc_match_data (void) | |
521 | { | |
522 | gfc_data *new; | |
523 | match m; | |
524 | ||
ca39e6f2 | 525 | set_in_match_data (true); |
2220652d | 526 | |
294fbfc8 TS |
527 | for (;;) |
528 | { | |
529 | new = gfc_get_data (); | |
530 | new->where = gfc_current_locus; | |
531 | ||
532 | m = top_var_list (new); | |
533 | if (m != MATCH_YES) | |
534 | goto cleanup; | |
535 | ||
536 | m = top_val_list (new); | |
537 | if (m != MATCH_YES) | |
538 | goto cleanup; | |
539 | ||
540 | new->next = gfc_current_ns->data; | |
541 | gfc_current_ns->data = new; | |
542 | ||
543 | if (gfc_match_eos () == MATCH_YES) | |
544 | break; | |
545 | ||
546 | gfc_match_char (','); /* Optional comma */ | |
547 | } | |
548 | ||
ca39e6f2 | 549 | set_in_match_data (false); |
2220652d | 550 | |
294fbfc8 TS |
551 | if (gfc_pure (NULL)) |
552 | { | |
553 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
554 | return MATCH_ERROR; | |
555 | } | |
556 | ||
557 | return MATCH_YES; | |
558 | ||
559 | cleanup: | |
ca39e6f2 | 560 | set_in_match_data (false); |
294fbfc8 TS |
561 | gfc_free_data (new); |
562 | return MATCH_ERROR; | |
563 | } | |
564 | ||
565 | ||
566 | /************************ Declaration statements *********************/ | |
567 | ||
6de9cd9a DN |
568 | /* Match an intent specification. Since this can only happen after an |
569 | INTENT word, a legal intent-spec must follow. */ | |
570 | ||
571 | static sym_intent | |
572 | match_intent_spec (void) | |
573 | { | |
574 | ||
575 | if (gfc_match (" ( in out )") == MATCH_YES) | |
576 | return INTENT_INOUT; | |
577 | if (gfc_match (" ( in )") == MATCH_YES) | |
578 | return INTENT_IN; | |
579 | if (gfc_match (" ( out )") == MATCH_YES) | |
580 | return INTENT_OUT; | |
581 | ||
582 | gfc_error ("Bad INTENT specification at %C"); | |
583 | return INTENT_UNKNOWN; | |
584 | } | |
585 | ||
586 | ||
587 | /* Matches a character length specification, which is either a | |
588 | specification expression or a '*'. */ | |
589 | ||
590 | static match | |
636dff67 | 591 | char_len_param_value (gfc_expr **expr) |
6de9cd9a | 592 | { |
cba28dad JD |
593 | match m; |
594 | ||
6de9cd9a DN |
595 | if (gfc_match_char ('*') == MATCH_YES) |
596 | { | |
597 | *expr = NULL; | |
598 | return MATCH_YES; | |
599 | } | |
600 | ||
cba28dad JD |
601 | m = gfc_match_expr (expr); |
602 | if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION) | |
603 | { | |
604 | if ((*expr)->value.function.actual | |
605 | && (*expr)->value.function.actual->expr->symtree) | |
606 | { | |
607 | gfc_expr *e; | |
608 | e = (*expr)->value.function.actual->expr; | |
609 | if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE | |
610 | && e->expr_type == EXPR_VARIABLE) | |
611 | { | |
612 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) | |
613 | goto syntax; | |
614 | if (e->symtree->n.sym->ts.type == BT_CHARACTER | |
615 | && e->symtree->n.sym->ts.cl | |
616 | && e->symtree->n.sym->ts.cl->length->ts.type == BT_UNKNOWN) | |
617 | goto syntax; | |
618 | } | |
619 | } | |
620 | } | |
621 | return m; | |
622 | ||
623 | syntax: | |
624 | gfc_error ("Conflict in attributes of function argument at %C"); | |
625 | return MATCH_ERROR; | |
6de9cd9a DN |
626 | } |
627 | ||
628 | ||
629 | /* A character length is a '*' followed by a literal integer or a | |
630 | char_len_param_value in parenthesis. */ | |
631 | ||
632 | static match | |
636dff67 | 633 | match_char_length (gfc_expr **expr) |
6de9cd9a | 634 | { |
5cf54585 | 635 | int length; |
6de9cd9a DN |
636 | match m; |
637 | ||
638 | m = gfc_match_char ('*'); | |
639 | if (m != MATCH_YES) | |
640 | return m; | |
641 | ||
5cf54585 | 642 | m = gfc_match_small_literal_int (&length, NULL); |
6de9cd9a DN |
643 | if (m == MATCH_ERROR) |
644 | return m; | |
645 | ||
646 | if (m == MATCH_YES) | |
647 | { | |
648 | *expr = gfc_int_expr (length); | |
649 | return m; | |
650 | } | |
651 | ||
652 | if (gfc_match_char ('(') == MATCH_NO) | |
653 | goto syntax; | |
654 | ||
655 | m = char_len_param_value (expr); | |
656 | if (m == MATCH_ERROR) | |
657 | return m; | |
658 | if (m == MATCH_NO) | |
659 | goto syntax; | |
660 | ||
661 | if (gfc_match_char (')') == MATCH_NO) | |
662 | { | |
663 | gfc_free_expr (*expr); | |
664 | *expr = NULL; | |
665 | goto syntax; | |
666 | } | |
667 | ||
668 | return MATCH_YES; | |
669 | ||
670 | syntax: | |
671 | gfc_error ("Syntax error in character length specification at %C"); | |
672 | return MATCH_ERROR; | |
673 | } | |
674 | ||
675 | ||
9e35b386 EE |
676 | /* Special subroutine for finding a symbol. Check if the name is found |
677 | in the current name space. If not, and we're compiling a function or | |
678 | subroutine and the parent compilation unit is an interface, then check | |
679 | to see if the name we've been given is the name of the interface | |
680 | (located in another namespace). */ | |
6de9cd9a DN |
681 | |
682 | static int | |
636dff67 | 683 | find_special (const char *name, gfc_symbol **result) |
6de9cd9a DN |
684 | { |
685 | gfc_state_data *s; | |
9e35b386 | 686 | int i; |
6de9cd9a | 687 | |
9e35b386 | 688 | i = gfc_get_symbol (name, NULL, result); |
d51347f9 | 689 | if (i == 0) |
9e35b386 | 690 | goto end; |
d51347f9 | 691 | |
6de9cd9a DN |
692 | if (gfc_current_state () != COMP_SUBROUTINE |
693 | && gfc_current_state () != COMP_FUNCTION) | |
9e35b386 | 694 | goto end; |
6de9cd9a DN |
695 | |
696 | s = gfc_state_stack->previous; | |
697 | if (s == NULL) | |
9e35b386 | 698 | goto end; |
6de9cd9a DN |
699 | |
700 | if (s->state != COMP_INTERFACE) | |
9e35b386 | 701 | goto end; |
6de9cd9a | 702 | if (s->sym == NULL) |
66e4ab31 | 703 | goto end; /* Nameless interface. */ |
6de9cd9a DN |
704 | |
705 | if (strcmp (name, s->sym->name) == 0) | |
706 | { | |
707 | *result = s->sym; | |
708 | return 0; | |
709 | } | |
710 | ||
9e35b386 EE |
711 | end: |
712 | return i; | |
6de9cd9a DN |
713 | } |
714 | ||
715 | ||
716 | /* Special subroutine for getting a symbol node associated with a | |
717 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
718 | symbol is created in the parent using with symtree node in the | |
719 | child unit pointing to the symbol. If the current namespace has no | |
720 | parent, then the symbol is just created in the current unit. */ | |
721 | ||
722 | static int | |
636dff67 | 723 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
6de9cd9a DN |
724 | { |
725 | gfc_symtree *st; | |
726 | gfc_symbol *sym; | |
a7ca4d8d | 727 | int rc = 0; |
6de9cd9a | 728 | |
1a492601 PT |
729 | /* Module functions have to be left in their own namespace because |
730 | they have potentially (almost certainly!) already been referenced. | |
731 | In this sense, they are rather like external functions. This is | |
732 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
733 | space is set to point to the master function, so that the fake | |
734 | result mechanism can work. */ | |
735 | if (module_fcn_entry) | |
6c12686b PT |
736 | { |
737 | /* Present if entry is declared to be a module procedure. */ | |
738 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); | |
aa84a9a5 | 739 | |
6c12686b PT |
740 | if (*result == NULL) |
741 | rc = gfc_get_symbol (name, NULL, result); | |
2e32a71e | 742 | else if (!gfc_get_symbol (name, NULL, &sym) && sym |
aa84a9a5 PT |
743 | && (*result)->ts.type == BT_UNKNOWN |
744 | && sym->attr.flavor == FL_UNKNOWN) | |
745 | /* Pick up the typespec for the entry, if declared in the function | |
746 | body. Note that this symbol is FL_UNKNOWN because it will | |
747 | only have appeared in a type declaration. The local symtree | |
748 | is set to point to the module symbol and a unique symtree | |
749 | to the local version. This latter ensures a correct clearing | |
750 | of the symbols. */ | |
2e32a71e PT |
751 | { |
752 | /* If the ENTRY proceeds its specification, we need to ensure | |
753 | that this does not raise a "has no IMPLICIT type" error. */ | |
754 | if (sym->ts.type == BT_UNKNOWN) | |
0e5a218b | 755 | sym->attr.untyped = 1; |
2e32a71e | 756 | |
0e5a218b | 757 | (*result)->ts = sym->ts; |
2e32a71e PT |
758 | |
759 | /* Put the symbol in the procedure namespace so that, should | |
760 | the ENTRY preceed its specification, the specification | |
761 | can be applied. */ | |
762 | (*result)->ns = gfc_current_ns; | |
763 | ||
764 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); | |
765 | st->n.sym = *result; | |
766 | st = gfc_get_unique_symtree (gfc_current_ns); | |
767 | st->n.sym = sym; | |
768 | } | |
6c12686b | 769 | } |
68ea355b PT |
770 | else |
771 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
6de9cd9a | 772 | |
a7ca4d8d PT |
773 | if (rc) |
774 | return rc; | |
775 | ||
68ea355b | 776 | sym = *result; |
2c693a24 | 777 | gfc_current_ns->refs++; |
6de9cd9a | 778 | |
68ea355b PT |
779 | if (sym && !sym->new && gfc_current_state () != COMP_INTERFACE) |
780 | { | |
cda7004b PT |
781 | /* Trap another encompassed procedure with the same name. All |
782 | these conditions are necessary to avoid picking up an entry | |
783 | whose name clashes with that of the encompassing procedure; | |
784 | this is handled using gsymbols to register unique,globally | |
785 | accessible names. */ | |
68ea355b | 786 | if (sym->attr.flavor != 0 |
636dff67 SK |
787 | && sym->attr.proc != 0 |
788 | && (sym->attr.subroutine || sym->attr.function) | |
789 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
68ea355b PT |
790 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
791 | name, &sym->declared_at); | |
792 | ||
fd3e70af JD |
793 | /* Trap a procedure with a name the same as interface in the |
794 | encompassing scope. */ | |
795 | if (sym->attr.generic != 0 | |
2305fa31 JD |
796 | && (sym->attr.subroutine || sym->attr.function) |
797 | && !sym->attr.mod_proc) | |
fd3e70af JD |
798 | gfc_error_now ("Name '%s' at %C is already defined" |
799 | " as a generic interface at %L", | |
800 | name, &sym->declared_at); | |
801 | ||
68ea355b PT |
802 | /* Trap declarations of attributes in encompassing scope. The |
803 | signature for this is that ts.kind is set. Legitimate | |
804 | references only set ts.type. */ | |
805 | if (sym->ts.kind != 0 | |
636dff67 SK |
806 | && !sym->attr.implicit_type |
807 | && sym->attr.proc == 0 | |
808 | && gfc_current_ns->parent != NULL | |
809 | && sym->attr.access == 0 | |
810 | && !module_fcn_entry) | |
811 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
812 | "and must not have attributes declared at %L", | |
68ea355b PT |
813 | name, &sym->declared_at); |
814 | } | |
815 | ||
816 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
817 | return rc; | |
6de9cd9a | 818 | |
1a492601 PT |
819 | /* Module function entries will already have a symtree in |
820 | the current namespace but will need one at module level. */ | |
821 | if (module_fcn_entry) | |
6c12686b PT |
822 | { |
823 | /* Present if entry is declared to be a module procedure. */ | |
824 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); | |
825 | if (st == NULL) | |
826 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
827 | } | |
1a492601 PT |
828 | else |
829 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
6de9cd9a | 830 | |
6de9cd9a DN |
831 | st->n.sym = sym; |
832 | sym->refs++; | |
833 | ||
66e4ab31 | 834 | /* See if the procedure should be a module procedure. */ |
6de9cd9a | 835 | |
1a492601 | 836 | if (((sym->ns->proc_name != NULL |
6c12686b PT |
837 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
838 | && sym->attr.proc != PROC_MODULE) | |
839 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) | |
840 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
841 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
842 | rc = 2; |
843 | ||
844 | return rc; | |
845 | } | |
846 | ||
847 | ||
a8b3b0b6 CR |
848 | /* Verify that the given symbol representing a parameter is C |
849 | interoperable, by checking to see if it was marked as such after | |
850 | its declaration. If the given symbol is not interoperable, a | |
851 | warning is reported, thus removing the need to return the status to | |
852 | the calling function. The standard does not require the user use | |
853 | one of the iso_c_binding named constants to declare an | |
854 | interoperable parameter, but we can't be sure if the param is C | |
855 | interop or not if the user doesn't. For example, integer(4) may be | |
856 | legal Fortran, but doesn't have meaning in C. It may interop with | |
857 | a number of the C types, which causes a problem because the | |
858 | compiler can't know which one. This code is almost certainly not | |
859 | portable, and the user will get what they deserve if the C type | |
860 | across platforms isn't always interoperable with integer(4). If | |
861 | the user had used something like integer(c_int) or integer(c_long), | |
862 | the compiler could have automatically handled the varying sizes | |
863 | across platforms. */ | |
864 | ||
865 | try | |
866 | verify_c_interop_param (gfc_symbol *sym) | |
867 | { | |
868 | int is_c_interop = 0; | |
869 | try retval = SUCCESS; | |
870 | ||
871 | /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). | |
872 | Don't repeat the checks here. */ | |
873 | if (sym->attr.implicit_type) | |
874 | return SUCCESS; | |
875 | ||
876 | /* For subroutines or functions that are passed to a BIND(C) procedure, | |
877 | they're interoperable if they're BIND(C) and their params are all | |
878 | interoperable. */ | |
879 | if (sym->attr.flavor == FL_PROCEDURE) | |
880 | { | |
881 | if (sym->attr.is_bind_c == 0) | |
882 | { | |
883 | gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " | |
884 | "attribute to be C interoperable", sym->name, | |
885 | &(sym->declared_at)); | |
886 | ||
887 | return FAILURE; | |
888 | } | |
889 | else | |
890 | { | |
891 | if (sym->attr.is_c_interop == 1) | |
892 | /* We've already checked this procedure; don't check it again. */ | |
893 | return SUCCESS; | |
894 | else | |
895 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, | |
896 | sym->common_block); | |
897 | } | |
898 | } | |
899 | ||
900 | /* See if we've stored a reference to a procedure that owns sym. */ | |
901 | if (sym->ns != NULL && sym->ns->proc_name != NULL) | |
902 | { | |
903 | if (sym->ns->proc_name->attr.is_bind_c == 1) | |
904 | { | |
905 | is_c_interop = | |
906 | (verify_c_interop (&(sym->ts), sym->name, &(sym->declared_at)) | |
907 | == SUCCESS ? 1 : 0); | |
908 | ||
909 | if (is_c_interop != 1) | |
910 | { | |
911 | /* Make personalized messages to give better feedback. */ | |
912 | if (sym->ts.type == BT_DERIVED) | |
913 | gfc_error ("Type '%s' at %L is a parameter to the BIND(C) " | |
914 | " procedure '%s' but is not C interoperable " | |
915 | "because derived type '%s' is not C interoperable", | |
916 | sym->name, &(sym->declared_at), | |
917 | sym->ns->proc_name->name, | |
918 | sym->ts.derived->name); | |
919 | else | |
920 | gfc_warning ("Variable '%s' at %L is a parameter to the " | |
921 | "BIND(C) procedure '%s' but may not be C " | |
922 | "interoperable", | |
923 | sym->name, &(sym->declared_at), | |
924 | sym->ns->proc_name->name); | |
925 | } | |
aa5e22f0 CR |
926 | |
927 | /* Character strings are only C interoperable if they have a | |
928 | length of 1. */ | |
929 | if (sym->ts.type == BT_CHARACTER) | |
930 | { | |
931 | gfc_charlen *cl = sym->ts.cl; | |
932 | if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT | |
933 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) | |
934 | { | |
935 | gfc_error ("Character argument '%s' at %L " | |
936 | "must be length 1 because " | |
937 | "procedure '%s' is BIND(C)", | |
938 | sym->name, &sym->declared_at, | |
939 | sym->ns->proc_name->name); | |
940 | retval = FAILURE; | |
941 | } | |
942 | } | |
943 | ||
a8b3b0b6 CR |
944 | /* We have to make sure that any param to a bind(c) routine does |
945 | not have the allocatable, pointer, or optional attributes, | |
946 | according to J3/04-007, section 5.1. */ | |
947 | if (sym->attr.allocatable == 1) | |
948 | { | |
949 | gfc_error ("Variable '%s' at %L cannot have the " | |
950 | "ALLOCATABLE attribute because procedure '%s'" | |
951 | " is BIND(C)", sym->name, &(sym->declared_at), | |
952 | sym->ns->proc_name->name); | |
953 | retval = FAILURE; | |
954 | } | |
955 | ||
956 | if (sym->attr.pointer == 1) | |
957 | { | |
958 | gfc_error ("Variable '%s' at %L cannot have the " | |
959 | "POINTER attribute because procedure '%s'" | |
960 | " is BIND(C)", sym->name, &(sym->declared_at), | |
961 | sym->ns->proc_name->name); | |
962 | retval = FAILURE; | |
963 | } | |
964 | ||
965 | if (sym->attr.optional == 1) | |
966 | { | |
967 | gfc_error ("Variable '%s' at %L cannot have the " | |
968 | "OPTIONAL attribute because procedure '%s'" | |
969 | " is BIND(C)", sym->name, &(sym->declared_at), | |
970 | sym->ns->proc_name->name); | |
971 | retval = FAILURE; | |
972 | } | |
973 | ||
974 | /* Make sure that if it has the dimension attribute, that it is | |
975 | either assumed size or explicit shape. */ | |
976 | if (sym->as != NULL) | |
977 | { | |
978 | if (sym->as->type == AS_ASSUMED_SHAPE) | |
979 | { | |
980 | gfc_error ("Assumed-shape array '%s' at %L cannot be an " | |
981 | "argument to the procedure '%s' at %L because " | |
982 | "the procedure is BIND(C)", sym->name, | |
983 | &(sym->declared_at), sym->ns->proc_name->name, | |
984 | &(sym->ns->proc_name->declared_at)); | |
985 | retval = FAILURE; | |
986 | } | |
987 | ||
988 | if (sym->as->type == AS_DEFERRED) | |
989 | { | |
990 | gfc_error ("Deferred-shape array '%s' at %L cannot be an " | |
991 | "argument to the procedure '%s' at %L because " | |
992 | "the procedure is BIND(C)", sym->name, | |
993 | &(sym->declared_at), sym->ns->proc_name->name, | |
994 | &(sym->ns->proc_name->declared_at)); | |
995 | retval = FAILURE; | |
996 | } | |
997 | } | |
998 | } | |
999 | } | |
1000 | ||
1001 | return retval; | |
1002 | } | |
1003 | ||
1004 | ||
1005 | /* Function called by variable_decl() that adds a name to the symbol table. */ | |
6de9cd9a DN |
1006 | |
1007 | static try | |
636dff67 SK |
1008 | build_sym (const char *name, gfc_charlen *cl, |
1009 | gfc_array_spec **as, locus *var_locus) | |
6de9cd9a DN |
1010 | { |
1011 | symbol_attribute attr; | |
1012 | gfc_symbol *sym; | |
1013 | ||
9e35b386 | 1014 | if (gfc_get_symbol (name, NULL, &sym)) |
6de9cd9a DN |
1015 | return FAILURE; |
1016 | ||
66e4ab31 | 1017 | /* Start updating the symbol table. Add basic type attribute if present. */ |
6de9cd9a | 1018 | if (current_ts.type != BT_UNKNOWN |
636dff67 SK |
1019 | && (sym->attr.implicit_type == 0 |
1020 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
6de9cd9a DN |
1021 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
1022 | return FAILURE; | |
1023 | ||
1024 | if (sym->ts.type == BT_CHARACTER) | |
1025 | sym->ts.cl = cl; | |
1026 | ||
1027 | /* Add dimension attribute if present. */ | |
1028 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
1029 | return FAILURE; | |
1030 | *as = NULL; | |
1031 | ||
1032 | /* Add attribute to symbol. The copy is so that we can reset the | |
1033 | dimension attribute. */ | |
1034 | attr = current_attr; | |
1035 | attr.dimension = 0; | |
1036 | ||
1037 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
1038 | return FAILURE; | |
1039 | ||
a8b3b0b6 CR |
1040 | /* Finish any work that may need to be done for the binding label, |
1041 | if it's a bind(c). The bind(c) attr is found before the symbol | |
1042 | is made, and before the symbol name (for data decls), so the | |
1043 | current_ts is holding the binding label, or nothing if the | |
1044 | name= attr wasn't given. Therefore, test here if we're dealing | |
1045 | with a bind(c) and make sure the binding label is set correctly. */ | |
1046 | if (sym->attr.is_bind_c == 1) | |
1047 | { | |
1048 | if (sym->binding_label[0] == '\0') | |
1049 | { | |
ad4a2f64 TB |
1050 | /* Set the binding label and verify that if a NAME= was specified |
1051 | then only one identifier was in the entity-decl-list. */ | |
1052 | if (set_binding_label (sym->binding_label, sym->name, | |
1053 | num_idents_on_line) == FAILURE) | |
a8b3b0b6 CR |
1054 | return FAILURE; |
1055 | } | |
1056 | } | |
1057 | ||
1058 | /* See if we know we're in a common block, and if it's a bind(c) | |
1059 | common then we need to make sure we're an interoperable type. */ | |
1060 | if (sym->attr.in_common == 1) | |
1061 | { | |
1062 | /* Test the common block object. */ | |
1063 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 | |
1064 | && sym->ts.is_c_interop != 1) | |
1065 | { | |
1066 | gfc_error_now ("Variable '%s' in common block '%s' at %C " | |
1067 | "must be declared with a C interoperable " | |
1068 | "kind since common block '%s' is BIND(C)", | |
1069 | sym->name, sym->common_block->name, | |
1070 | sym->common_block->name); | |
1071 | gfc_clear_error (); | |
1072 | } | |
1073 | } | |
1074 | ||
9a3db5a3 PT |
1075 | sym->attr.implied_index = 0; |
1076 | ||
6de9cd9a DN |
1077 | return SUCCESS; |
1078 | } | |
1079 | ||
636dff67 | 1080 | |
df7cc9b5 FW |
1081 | /* Set character constant to the given length. The constant will be padded or |
1082 | truncated. */ | |
1083 | ||
1084 | void | |
636dff67 | 1085 | gfc_set_constant_character_len (int len, gfc_expr *expr, bool array) |
df7cc9b5 | 1086 | { |
636dff67 | 1087 | char *s; |
df7cc9b5 FW |
1088 | int slen; |
1089 | ||
1090 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
1091 | gcc_assert (expr->ts.type == BT_CHARACTER && expr->ts.kind == 1); | |
1092 | ||
1093 | slen = expr->value.character.length; | |
1094 | if (len != slen) | |
1095 | { | |
150675a8 | 1096 | s = gfc_getmem (len + 1); |
df7cc9b5 FW |
1097 | memcpy (s, expr->value.character.string, MIN (len, slen)); |
1098 | if (len > slen) | |
1099 | memset (&s[slen], ' ', len - slen); | |
2220652d PT |
1100 | |
1101 | if (gfc_option.warn_character_truncation && slen > len) | |
1102 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
1103 | "(%d/%d)", &expr->where, slen, len); | |
1104 | ||
1105 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
1106 | initializers. */ | |
1107 | if (array && slen < len && !(gfc_option.allow_std & GFC_STD_GNU)) | |
1108 | gfc_error_now ("The CHARACTER elements of the array constructor " | |
1109 | "at %L must have the same length (%d/%d)", | |
636dff67 | 1110 | &expr->where, slen, len); |
2220652d | 1111 | |
150675a8 | 1112 | s[len] = '\0'; |
df7cc9b5 FW |
1113 | gfc_free (expr->value.character.string); |
1114 | expr->value.character.string = s; | |
1115 | expr->value.character.length = len; | |
1116 | } | |
1117 | } | |
6de9cd9a | 1118 | |
25d8f0a2 | 1119 | |
d51347f9 | 1120 | /* Function to create and update the enumerator history |
25d8f0a2 | 1121 | using the information passed as arguments. |
d51347f9 TB |
1122 | Pointer "max_enum" is also updated, to point to |
1123 | enum history node containing largest initializer. | |
25d8f0a2 TS |
1124 | |
1125 | SYM points to the symbol node of enumerator. | |
66e4ab31 | 1126 | INIT points to its enumerator value. */ |
25d8f0a2 | 1127 | |
d51347f9 | 1128 | static void |
636dff67 | 1129 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
25d8f0a2 TS |
1130 | { |
1131 | enumerator_history *new_enum_history; | |
1132 | gcc_assert (sym != NULL && init != NULL); | |
1133 | ||
1134 | new_enum_history = gfc_getmem (sizeof (enumerator_history)); | |
1135 | ||
1136 | new_enum_history->sym = sym; | |
1137 | new_enum_history->initializer = init; | |
1138 | new_enum_history->next = NULL; | |
1139 | ||
1140 | if (enum_history == NULL) | |
1141 | { | |
1142 | enum_history = new_enum_history; | |
1143 | max_enum = enum_history; | |
1144 | } | |
1145 | else | |
1146 | { | |
1147 | new_enum_history->next = enum_history; | |
1148 | enum_history = new_enum_history; | |
1149 | ||
d51347f9 | 1150 | if (mpz_cmp (max_enum->initializer->value.integer, |
25d8f0a2 | 1151 | new_enum_history->initializer->value.integer) < 0) |
636dff67 | 1152 | max_enum = new_enum_history; |
25d8f0a2 TS |
1153 | } |
1154 | } | |
1155 | ||
1156 | ||
d51347f9 | 1157 | /* Function to free enum kind history. */ |
25d8f0a2 | 1158 | |
d51347f9 | 1159 | void |
636dff67 | 1160 | gfc_free_enum_history (void) |
25d8f0a2 | 1161 | { |
d51347f9 TB |
1162 | enumerator_history *current = enum_history; |
1163 | enumerator_history *next; | |
25d8f0a2 TS |
1164 | |
1165 | while (current != NULL) | |
1166 | { | |
1167 | next = current->next; | |
1168 | gfc_free (current); | |
1169 | current = next; | |
1170 | } | |
1171 | max_enum = NULL; | |
1172 | enum_history = NULL; | |
1173 | } | |
1174 | ||
1175 | ||
6de9cd9a DN |
1176 | /* Function called by variable_decl() that adds an initialization |
1177 | expression to a symbol. */ | |
1178 | ||
1179 | static try | |
66e4ab31 | 1180 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) |
6de9cd9a DN |
1181 | { |
1182 | symbol_attribute attr; | |
1183 | gfc_symbol *sym; | |
1184 | gfc_expr *init; | |
1185 | ||
1186 | init = *initp; | |
1187 | if (find_special (name, &sym)) | |
1188 | return FAILURE; | |
1189 | ||
1190 | attr = sym->attr; | |
1191 | ||
1192 | /* If this symbol is confirming an implicit parameter type, | |
1193 | then an initialization expression is not allowed. */ | |
1194 | if (attr.flavor == FL_PARAMETER | |
1195 | && sym->value != NULL | |
1196 | && *initp != NULL) | |
1197 | { | |
1198 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
1199 | sym->name); | |
1200 | return FAILURE; | |
1201 | } | |
1202 | ||
1203 | if (init == NULL) | |
1204 | { | |
1205 | /* An initializer is required for PARAMETER declarations. */ | |
1206 | if (attr.flavor == FL_PARAMETER) | |
1207 | { | |
1208 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
1209 | return FAILURE; | |
1210 | } | |
1211 | } | |
1212 | else | |
1213 | { | |
1214 | /* If a variable appears in a DATA block, it cannot have an | |
1de8a836 | 1215 | initializer. */ |
6de9cd9a DN |
1216 | if (sym->attr.data) |
1217 | { | |
636dff67 SK |
1218 | gfc_error ("Variable '%s' at %C with an initializer already " |
1219 | "appears in a DATA statement", sym->name); | |
6de9cd9a DN |
1220 | return FAILURE; |
1221 | } | |
1222 | ||
75d17889 TS |
1223 | /* Check if the assignment can happen. This has to be put off |
1224 | until later for a derived type variable. */ | |
6de9cd9a DN |
1225 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
1226 | && gfc_check_assign_symbol (sym, init) == FAILURE) | |
1227 | return FAILURE; | |
1228 | ||
df7cc9b5 FW |
1229 | if (sym->ts.type == BT_CHARACTER && sym->ts.cl) |
1230 | { | |
1231 | /* Update symbol character length according initializer. */ | |
1232 | if (sym->ts.cl->length == NULL) | |
1233 | { | |
a99288e5 | 1234 | int clen; |
66e4ab31 SK |
1235 | /* If there are multiple CHARACTER variables declared on the |
1236 | same line, we don't want them to share the same length. */ | |
4213f93b PT |
1237 | sym->ts.cl = gfc_get_charlen (); |
1238 | sym->ts.cl->next = gfc_current_ns->cl_list; | |
1239 | gfc_current_ns->cl_list = sym->ts.cl; | |
96f4873b | 1240 | |
a99288e5 PT |
1241 | if (sym->attr.flavor == FL_PARAMETER) |
1242 | { | |
1243 | if (init->expr_type == EXPR_CONSTANT) | |
1244 | { | |
1245 | clen = init->value.character.length; | |
1246 | sym->ts.cl->length = gfc_int_expr (clen); | |
1247 | } | |
1248 | else if (init->expr_type == EXPR_ARRAY) | |
1249 | { | |
1250 | gfc_expr *p = init->value.constructor->expr; | |
1251 | clen = p->value.character.length; | |
1252 | sym->ts.cl->length = gfc_int_expr (clen); | |
1253 | } | |
1254 | else if (init->ts.cl && init->ts.cl->length) | |
1255 | sym->ts.cl->length = | |
1256 | gfc_copy_expr (sym->value->ts.cl->length); | |
1257 | } | |
df7cc9b5 FW |
1258 | } |
1259 | /* Update initializer character length according symbol. */ | |
1260 | else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT) | |
1261 | { | |
1262 | int len = mpz_get_si (sym->ts.cl->length->value.integer); | |
1263 | gfc_constructor * p; | |
1264 | ||
1265 | if (init->expr_type == EXPR_CONSTANT) | |
2220652d | 1266 | gfc_set_constant_character_len (len, init, false); |
df7cc9b5 FW |
1267 | else if (init->expr_type == EXPR_ARRAY) |
1268 | { | |
dcdc7b6c PT |
1269 | /* Build a new charlen to prevent simplification from |
1270 | deleting the length before it is resolved. */ | |
1271 | init->ts.cl = gfc_get_charlen (); | |
1272 | init->ts.cl->next = gfc_current_ns->cl_list; | |
1273 | gfc_current_ns->cl_list = sym->ts.cl; | |
df7cc9b5 | 1274 | init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length); |
dcdc7b6c | 1275 | |
df7cc9b5 | 1276 | for (p = init->value.constructor; p; p = p->next) |
2220652d | 1277 | gfc_set_constant_character_len (len, p->expr, false); |
df7cc9b5 FW |
1278 | } |
1279 | } | |
1280 | } | |
1281 | ||
a8b3b0b6 CR |
1282 | /* Need to check if the expression we initialized this |
1283 | to was one of the iso_c_binding named constants. If so, | |
1284 | and we're a parameter (constant), let it be iso_c. | |
1285 | For example: | |
1286 | integer(c_int), parameter :: my_int = c_int | |
1287 | integer(my_int) :: my_int_2 | |
1288 | If we mark my_int as iso_c (since we can see it's value | |
1289 | is equal to one of the named constants), then my_int_2 | |
1290 | will be considered C interoperable. */ | |
1291 | if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) | |
1292 | { | |
1293 | sym->ts.is_iso_c |= init->ts.is_iso_c; | |
1294 | sym->ts.is_c_interop |= init->ts.is_c_interop; | |
1295 | /* attr bits needed for module files. */ | |
1296 | sym->attr.is_iso_c |= init->ts.is_iso_c; | |
1297 | sym->attr.is_c_interop |= init->ts.is_c_interop; | |
1298 | if (init->ts.is_iso_c) | |
1299 | sym->ts.f90_type = init->ts.f90_type; | |
1300 | } | |
1301 | ||
6de9cd9a DN |
1302 | /* Add initializer. Make sure we keep the ranks sane. */ |
1303 | if (sym->attr.dimension && init->rank == 0) | |
a9b43781 PT |
1304 | { |
1305 | mpz_t size; | |
1306 | gfc_expr *array; | |
1307 | gfc_constructor *c; | |
1308 | int n; | |
1309 | if (sym->attr.flavor == FL_PARAMETER | |
1310 | && init->expr_type == EXPR_CONSTANT | |
1311 | && spec_size (sym->as, &size) == SUCCESS | |
1312 | && mpz_cmp_si (size, 0) > 0) | |
1313 | { | |
1314 | array = gfc_start_constructor (init->ts.type, init->ts.kind, | |
1315 | &init->where); | |
1316 | ||
1317 | array->value.constructor = c = NULL; | |
1318 | for (n = 0; n < (int)mpz_get_si (size); n++) | |
1319 | { | |
1320 | if (array->value.constructor == NULL) | |
1321 | { | |
1322 | array->value.constructor = c = gfc_get_constructor (); | |
1323 | c->expr = init; | |
1324 | } | |
1325 | else | |
1326 | { | |
1327 | c->next = gfc_get_constructor (); | |
1328 | c = c->next; | |
1329 | c->expr = gfc_copy_expr (init); | |
1330 | } | |
1331 | } | |
1332 | ||
1333 | array->shape = gfc_get_shape (sym->as->rank); | |
1334 | for (n = 0; n < sym->as->rank; n++) | |
1335 | spec_dimen_size (sym->as, n, &array->shape[n]); | |
1336 | ||
1337 | init = array; | |
1338 | mpz_clear (size); | |
1339 | } | |
1340 | init->rank = sym->as->rank; | |
1341 | } | |
6de9cd9a DN |
1342 | |
1343 | sym->value = init; | |
ef7236d2 DF |
1344 | if (sym->attr.save == SAVE_NONE) |
1345 | sym->attr.save = SAVE_IMPLICIT; | |
6de9cd9a DN |
1346 | *initp = NULL; |
1347 | } | |
1348 | ||
1349 | return SUCCESS; | |
1350 | } | |
1351 | ||
1352 | ||
1353 | /* Function called by variable_decl() that adds a name to a structure | |
1354 | being built. */ | |
1355 | ||
1356 | static try | |
636dff67 SK |
1357 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
1358 | gfc_array_spec **as) | |
6de9cd9a DN |
1359 | { |
1360 | gfc_component *c; | |
1361 | ||
1362 | /* If the current symbol is of the same derived type that we're | |
1363 | constructing, it must have the pointer attribute. */ | |
1364 | if (current_ts.type == BT_DERIVED | |
1365 | && current_ts.derived == gfc_current_block () | |
1366 | && current_attr.pointer == 0) | |
1367 | { | |
1368 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1369 | return FAILURE; | |
1370 | } | |
1371 | ||
636dff67 | 1372 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
6de9cd9a DN |
1373 | { |
1374 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1375 | { | |
1376 | gfc_error ("Array component of structure at %C must have explicit " | |
1377 | "or deferred shape"); | |
1378 | return FAILURE; | |
1379 | } | |
1380 | } | |
1381 | ||
1382 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1383 | return FAILURE; | |
1384 | ||
1385 | c->ts = current_ts; | |
1386 | c->ts.cl = cl; | |
1387 | gfc_set_component_attr (c, ¤t_attr); | |
1388 | ||
1389 | c->initializer = *init; | |
1390 | *init = NULL; | |
1391 | ||
1392 | c->as = *as; | |
1393 | if (c->as != NULL) | |
1394 | c->dimension = 1; | |
1395 | *as = NULL; | |
1396 | ||
28d08315 PT |
1397 | /* Should this ever get more complicated, combine with similar section |
1398 | in add_init_expr_to_sym into a separate function. */ | |
1399 | if (c->ts.type == BT_CHARACTER && !c->pointer && c->initializer) | |
1400 | { | |
1401 | int len = mpz_get_si (c->ts.cl->length->value.integer); | |
1402 | ||
1403 | if (c->initializer->expr_type == EXPR_CONSTANT) | |
1404 | gfc_set_constant_character_len (len, c->initializer, false); | |
1405 | else if (mpz_cmp (c->ts.cl->length->value.integer, | |
1406 | c->initializer->ts.cl->length->value.integer)) | |
1407 | { | |
1408 | gfc_constructor *ctor = c->initializer->value.constructor; | |
1409 | for (;ctor ; ctor = ctor->next) | |
1410 | if (ctor->expr->expr_type == EXPR_CONSTANT) | |
1411 | gfc_set_constant_character_len (len, ctor->expr, true); | |
1412 | } | |
1413 | } | |
1414 | ||
6de9cd9a DN |
1415 | /* Check array components. */ |
1416 | if (!c->dimension) | |
5046aff5 PT |
1417 | { |
1418 | if (c->allocatable) | |
1419 | { | |
1420 | gfc_error ("Allocatable component at %C must be an array"); | |
1421 | return FAILURE; | |
1422 | } | |
1423 | else | |
1424 | return SUCCESS; | |
1425 | } | |
6de9cd9a DN |
1426 | |
1427 | if (c->pointer) | |
1428 | { | |
1429 | if (c->as->type != AS_DEFERRED) | |
1430 | { | |
5046aff5 PT |
1431 | gfc_error ("Pointer array component of structure at %C must have a " |
1432 | "deferred shape"); | |
1433 | return FAILURE; | |
1434 | } | |
1435 | } | |
1436 | else if (c->allocatable) | |
1437 | { | |
1438 | if (c->as->type != AS_DEFERRED) | |
1439 | { | |
1440 | gfc_error ("Allocatable component of structure at %C must have a " | |
1441 | "deferred shape"); | |
6de9cd9a DN |
1442 | return FAILURE; |
1443 | } | |
1444 | } | |
1445 | else | |
1446 | { | |
1447 | if (c->as->type != AS_EXPLICIT) | |
1448 | { | |
636dff67 SK |
1449 | gfc_error ("Array component of structure at %C must have an " |
1450 | "explicit shape"); | |
6de9cd9a DN |
1451 | return FAILURE; |
1452 | } | |
1453 | } | |
1454 | ||
1455 | return SUCCESS; | |
1456 | } | |
1457 | ||
1458 | ||
1459 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1460 | ||
1461 | match | |
636dff67 | 1462 | gfc_match_null (gfc_expr **result) |
6de9cd9a DN |
1463 | { |
1464 | gfc_symbol *sym; | |
1465 | gfc_expr *e; | |
1466 | match m; | |
1467 | ||
1468 | m = gfc_match (" null ( )"); | |
1469 | if (m != MATCH_YES) | |
1470 | return m; | |
1471 | ||
1472 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1473 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1474 | { | |
1475 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1476 | return MATCH_ERROR; | |
1477 | } | |
1478 | ||
1479 | gfc_intrinsic_symbol (sym); | |
1480 | ||
1481 | if (sym->attr.proc != PROC_INTRINSIC | |
231b2fcc TS |
1482 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1483 | sym->name, NULL) == FAILURE | |
1484 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
6de9cd9a DN |
1485 | return MATCH_ERROR; |
1486 | ||
1487 | e = gfc_get_expr (); | |
63645982 | 1488 | e->where = gfc_current_locus; |
6de9cd9a DN |
1489 | e->expr_type = EXPR_NULL; |
1490 | e->ts.type = BT_UNKNOWN; | |
1491 | ||
1492 | *result = e; | |
1493 | ||
1494 | return MATCH_YES; | |
1495 | } | |
1496 | ||
1497 | ||
6de9cd9a DN |
1498 | /* Match a variable name with an optional initializer. When this |
1499 | subroutine is called, a variable is expected to be parsed next. | |
1500 | Depending on what is happening at the moment, updates either the | |
1501 | symbol table or the current interface. */ | |
1502 | ||
1503 | static match | |
949d5b72 | 1504 | variable_decl (int elem) |
6de9cd9a DN |
1505 | { |
1506 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1507 | gfc_expr *initializer, *char_len; | |
1508 | gfc_array_spec *as; | |
83d890b9 | 1509 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
6de9cd9a DN |
1510 | gfc_charlen *cl; |
1511 | locus var_locus; | |
1512 | match m; | |
1513 | try t; | |
83d890b9 | 1514 | gfc_symbol *sym; |
25d8f0a2 | 1515 | locus old_locus; |
6de9cd9a DN |
1516 | |
1517 | initializer = NULL; | |
1518 | as = NULL; | |
83d890b9 | 1519 | cp_as = NULL; |
25d8f0a2 | 1520 | old_locus = gfc_current_locus; |
6de9cd9a DN |
1521 | |
1522 | /* When we get here, we've just matched a list of attributes and | |
1523 | maybe a type and a double colon. The next thing we expect to see | |
1524 | is the name of the symbol. */ | |
1525 | m = gfc_match_name (name); | |
1526 | if (m != MATCH_YES) | |
1527 | goto cleanup; | |
1528 | ||
63645982 | 1529 | var_locus = gfc_current_locus; |
6de9cd9a DN |
1530 | |
1531 | /* Now we could see the optional array spec. or character length. */ | |
1532 | m = gfc_match_array_spec (&as); | |
83d890b9 AL |
1533 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1534 | cp_as = gfc_copy_array_spec (as); | |
1535 | else if (m == MATCH_ERROR) | |
6de9cd9a | 1536 | goto cleanup; |
25d8f0a2 | 1537 | |
6de9cd9a DN |
1538 | if (m == MATCH_NO) |
1539 | as = gfc_copy_array_spec (current_as); | |
1540 | ||
1541 | char_len = NULL; | |
1542 | cl = NULL; | |
1543 | ||
1544 | if (current_ts.type == BT_CHARACTER) | |
1545 | { | |
1546 | switch (match_char_length (&char_len)) | |
1547 | { | |
1548 | case MATCH_YES: | |
1549 | cl = gfc_get_charlen (); | |
1550 | cl->next = gfc_current_ns->cl_list; | |
1551 | gfc_current_ns->cl_list = cl; | |
1552 | ||
1553 | cl->length = char_len; | |
1554 | break; | |
1555 | ||
949d5b72 | 1556 | /* Non-constant lengths need to be copied after the first |
9b21a380 | 1557 | element. Also copy assumed lengths. */ |
6de9cd9a | 1558 | case MATCH_NO: |
9b21a380 JJ |
1559 | if (elem > 1 |
1560 | && (current_ts.cl->length == NULL | |
1561 | || current_ts.cl->length->expr_type != EXPR_CONSTANT)) | |
949d5b72 PT |
1562 | { |
1563 | cl = gfc_get_charlen (); | |
1564 | cl->next = gfc_current_ns->cl_list; | |
1565 | gfc_current_ns->cl_list = cl; | |
1566 | cl->length = gfc_copy_expr (current_ts.cl->length); | |
1567 | } | |
1568 | else | |
1569 | cl = current_ts.cl; | |
1570 | ||
6de9cd9a DN |
1571 | break; |
1572 | ||
1573 | case MATCH_ERROR: | |
1574 | goto cleanup; | |
1575 | } | |
1576 | } | |
1577 | ||
83d890b9 | 1578 | /* If this symbol has already shown up in a Cray Pointer declaration, |
66e4ab31 | 1579 | then we want to set the type & bail out. */ |
83d890b9 AL |
1580 | if (gfc_option.flag_cray_pointer) |
1581 | { | |
1582 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1583 | if (sym != NULL && sym->attr.cray_pointee) | |
1584 | { | |
1585 | sym->ts.type = current_ts.type; | |
1586 | sym->ts.kind = current_ts.kind; | |
1587 | sym->ts.cl = cl; | |
1588 | sym->ts.derived = current_ts.derived; | |
a8b3b0b6 CR |
1589 | sym->ts.is_c_interop = current_ts.is_c_interop; |
1590 | sym->ts.is_iso_c = current_ts.is_iso_c; | |
83d890b9 AL |
1591 | m = MATCH_YES; |
1592 | ||
1593 | /* Check to see if we have an array specification. */ | |
1594 | if (cp_as != NULL) | |
1595 | { | |
1596 | if (sym->as != NULL) | |
1597 | { | |
e25a0da3 | 1598 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
83d890b9 AL |
1599 | gfc_free_array_spec (cp_as); |
1600 | m = MATCH_ERROR; | |
1601 | goto cleanup; | |
1602 | } | |
1603 | else | |
1604 | { | |
1605 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1606 | gfc_internal_error ("Couldn't set pointee array spec."); | |
d51347f9 | 1607 | |
83d890b9 | 1608 | /* Fix the array spec. */ |
d51347f9 | 1609 | m = gfc_mod_pointee_as (sym->as); |
83d890b9 AL |
1610 | if (m == MATCH_ERROR) |
1611 | goto cleanup; | |
1612 | } | |
d51347f9 | 1613 | } |
83d890b9 AL |
1614 | goto cleanup; |
1615 | } | |
1616 | else | |
1617 | { | |
1618 | gfc_free_array_spec (cp_as); | |
1619 | } | |
1620 | } | |
d51347f9 TB |
1621 | |
1622 | ||
6de9cd9a DN |
1623 | /* OK, we've successfully matched the declaration. Now put the |
1624 | symbol in the current namespace, because it might be used in the | |
69de3b83 | 1625 | optional initialization expression for this symbol, e.g. this is |
6de9cd9a DN |
1626 | perfectly legal: |
1627 | ||
1628 | integer, parameter :: i = huge(i) | |
1629 | ||
1630 | This is only true for parameters or variables of a basic type. | |
1631 | For components of derived types, it is not true, so we don't | |
1632 | create a symbol for those yet. If we fail to create the symbol, | |
1633 | bail out. */ | |
1634 | if (gfc_current_state () != COMP_DERIVED | |
1635 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1636 | { | |
72af9f0b PT |
1637 | m = MATCH_ERROR; |
1638 | goto cleanup; | |
1639 | } | |
1640 | ||
6133c68a TS |
1641 | /* An interface body specifies all of the procedure's |
1642 | characteristics and these shall be consistent with those | |
1643 | specified in the procedure definition, except that the interface | |
1644 | may specify a procedure that is not pure if the procedure is | |
1645 | defined to be pure(12.3.2). */ | |
72af9f0b | 1646 | if (current_ts.type == BT_DERIVED |
636dff67 SK |
1647 | && gfc_current_ns->proc_name |
1648 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
5a8af0b4 PT |
1649 | && current_ts.derived->ns != gfc_current_ns) |
1650 | { | |
1651 | gfc_symtree *st; | |
1652 | st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.derived->name); | |
1653 | if (!(current_ts.derived->attr.imported | |
1654 | && st != NULL | |
1655 | && st->n.sym == current_ts.derived) | |
1656 | && !gfc_current_ns->has_import_set) | |
1657 | { | |
1658 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1659 | "interface", name); | |
1660 | m = MATCH_ERROR; | |
1661 | goto cleanup; | |
1662 | } | |
6de9cd9a DN |
1663 | } |
1664 | ||
1665 | /* In functions that have a RESULT variable defined, the function | |
1666 | name always refers to function calls. Therefore, the name is | |
1667 | not allowed to appear in specification statements. */ | |
1668 | if (gfc_current_state () == COMP_FUNCTION | |
1669 | && gfc_current_block () != NULL | |
1670 | && gfc_current_block ()->result != NULL | |
1671 | && gfc_current_block ()->result != gfc_current_block () | |
1672 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1673 | { | |
1674 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1675 | m = MATCH_ERROR; | |
1676 | goto cleanup; | |
1677 | } | |
1678 | ||
294fbfc8 TS |
1679 | /* We allow old-style initializations of the form |
1680 | integer i /2/, j(4) /3*3, 1/ | |
1681 | (if no colon has been seen). These are different from data | |
1682 | statements in that initializers are only allowed to apply to the | |
1683 | variable immediately preceding, i.e. | |
1684 | integer i, j /1, 2/ | |
1685 | is not allowed. Therefore we have to do some work manually, that | |
75d17889 | 1686 | could otherwise be left to the matchers for DATA statements. */ |
294fbfc8 TS |
1687 | |
1688 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1689 | { | |
1690 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1691 | "initialization at %C") == FAILURE) | |
1692 | return MATCH_ERROR; | |
d51347f9 | 1693 | |
294fbfc8 TS |
1694 | return match_old_style_init (name); |
1695 | } | |
1696 | ||
6de9cd9a DN |
1697 | /* The double colon must be present in order to have initializers. |
1698 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1699 | if (colon_seen) | |
1700 | { | |
1701 | if (gfc_match (" =>") == MATCH_YES) | |
1702 | { | |
6de9cd9a DN |
1703 | if (!current_attr.pointer) |
1704 | { | |
1705 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1706 | m = MATCH_ERROR; | |
1707 | goto cleanup; | |
1708 | } | |
1709 | ||
1710 | m = gfc_match_null (&initializer); | |
1711 | if (m == MATCH_NO) | |
1712 | { | |
def66134 | 1713 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
6de9cd9a DN |
1714 | m = MATCH_ERROR; |
1715 | } | |
1716 | ||
1717 | if (gfc_pure (NULL)) | |
1718 | { | |
636dff67 SK |
1719 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1720 | "a PURE procedure"); | |
6de9cd9a DN |
1721 | m = MATCH_ERROR; |
1722 | } | |
1723 | ||
1724 | if (m != MATCH_YES) | |
1725 | goto cleanup; | |
1726 | ||
6de9cd9a DN |
1727 | } |
1728 | else if (gfc_match_char ('=') == MATCH_YES) | |
1729 | { | |
1730 | if (current_attr.pointer) | |
1731 | { | |
636dff67 SK |
1732 | gfc_error ("Pointer initialization at %C requires '=>', " |
1733 | "not '='"); | |
6de9cd9a DN |
1734 | m = MATCH_ERROR; |
1735 | goto cleanup; | |
1736 | } | |
1737 | ||
1738 | m = gfc_match_init_expr (&initializer); | |
1739 | if (m == MATCH_NO) | |
1740 | { | |
1741 | gfc_error ("Expected an initialization expression at %C"); | |
1742 | m = MATCH_ERROR; | |
1743 | } | |
1744 | ||
1745 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1746 | { | |
636dff67 SK |
1747 | gfc_error ("Initialization of variable at %C is not allowed in " |
1748 | "a PURE procedure"); | |
6de9cd9a DN |
1749 | m = MATCH_ERROR; |
1750 | } | |
1751 | ||
1752 | if (m != MATCH_YES) | |
1753 | goto cleanup; | |
1754 | } | |
cb44ab82 VL |
1755 | } |
1756 | ||
5046aff5 PT |
1757 | if (initializer != NULL && current_attr.allocatable |
1758 | && gfc_current_state () == COMP_DERIVED) | |
1759 | { | |
636dff67 SK |
1760 | gfc_error ("Initialization of allocatable component at %C is not " |
1761 | "allowed"); | |
5046aff5 PT |
1762 | m = MATCH_ERROR; |
1763 | goto cleanup; | |
1764 | } | |
1765 | ||
54b4ba60 | 1766 | /* Add the initializer. Note that it is fine if initializer is |
6de9cd9a DN |
1767 | NULL here, because we sometimes also need to check if a |
1768 | declaration *must* have an initialization expression. */ | |
1769 | if (gfc_current_state () != COMP_DERIVED) | |
1770 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1771 | else | |
54b4ba60 | 1772 | { |
5046aff5 | 1773 | if (current_ts.type == BT_DERIVED |
636dff67 | 1774 | && !current_attr.pointer && !initializer) |
54b4ba60 PB |
1775 | initializer = gfc_default_initializer (¤t_ts); |
1776 | t = build_struct (name, cl, &initializer, &as); | |
1777 | } | |
6de9cd9a DN |
1778 | |
1779 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1780 | ||
1781 | cleanup: | |
1782 | /* Free stuff up and return. */ | |
1783 | gfc_free_expr (initializer); | |
1784 | gfc_free_array_spec (as); | |
1785 | ||
1786 | return m; | |
1787 | } | |
1788 | ||
1789 | ||
b2b81a3f BM |
1790 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
1791 | This assumes that the byte size is equal to the kind number for | |
1792 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
6de9cd9a DN |
1793 | |
1794 | match | |
636dff67 | 1795 | gfc_match_old_kind_spec (gfc_typespec *ts) |
6de9cd9a DN |
1796 | { |
1797 | match m; | |
5cf54585 | 1798 | int original_kind; |
6de9cd9a DN |
1799 | |
1800 | if (gfc_match_char ('*') != MATCH_YES) | |
1801 | return MATCH_NO; | |
1802 | ||
5cf54585 | 1803 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
6de9cd9a DN |
1804 | if (m != MATCH_YES) |
1805 | return MATCH_ERROR; | |
1806 | ||
e45b3c75 ES |
1807 | original_kind = ts->kind; |
1808 | ||
6de9cd9a | 1809 | /* Massage the kind numbers for complex types. */ |
e45b3c75 ES |
1810 | if (ts->type == BT_COMPLEX) |
1811 | { | |
1812 | if (ts->kind % 2) | |
636dff67 SK |
1813 | { |
1814 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1815 | gfc_basic_typename (ts->type), original_kind); | |
1816 | return MATCH_ERROR; | |
1817 | } | |
e45b3c75 ES |
1818 | ts->kind /= 2; |
1819 | } | |
6de9cd9a | 1820 | |
e7a2d5fb | 1821 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a | 1822 | { |
e45b3c75 | 1823 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
636dff67 | 1824 | gfc_basic_typename (ts->type), original_kind); |
6de9cd9a DN |
1825 | return MATCH_ERROR; |
1826 | } | |
1827 | ||
df8652dc SK |
1828 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
1829 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1830 | return MATCH_ERROR; | |
1831 | ||
6de9cd9a DN |
1832 | return MATCH_YES; |
1833 | } | |
1834 | ||
1835 | ||
1836 | /* Match a kind specification. Since kinds are generally optional, we | |
1837 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1838 | string is found, then we know we have an error. */ | |
1839 | ||
1840 | match | |
e2d29968 | 1841 | gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only) |
6de9cd9a | 1842 | { |
e2d29968 | 1843 | locus where, loc; |
6de9cd9a DN |
1844 | gfc_expr *e; |
1845 | match m, n; | |
1846 | const char *msg; | |
1847 | ||
1848 | m = MATCH_NO; | |
e2d29968 | 1849 | n = MATCH_YES; |
6de9cd9a DN |
1850 | e = NULL; |
1851 | ||
e2d29968 PT |
1852 | where = loc = gfc_current_locus; |
1853 | ||
1854 | if (kind_expr_only) | |
1855 | goto kind_expr; | |
6de9cd9a DN |
1856 | |
1857 | if (gfc_match_char ('(') == MATCH_NO) | |
1858 | return MATCH_NO; | |
1859 | ||
1860 | /* Also gobbles optional text. */ | |
1861 | if (gfc_match (" kind = ") == MATCH_YES) | |
1862 | m = MATCH_ERROR; | |
1863 | ||
e2d29968 PT |
1864 | loc = gfc_current_locus; |
1865 | ||
1866 | kind_expr: | |
6de9cd9a | 1867 | n = gfc_match_init_expr (&e); |
e2d29968 | 1868 | |
6de9cd9a | 1869 | if (n != MATCH_YES) |
e2d29968 PT |
1870 | { |
1871 | if (gfc_current_state () == COMP_INTERFACE | |
1872 | || gfc_current_state () == COMP_NONE | |
1873 | || gfc_current_state () == COMP_CONTAINS) | |
1874 | { | |
1875 | /* Signal using kind = -1 that the expression might include | |
1876 | use associated or imported parameters and try again after | |
1877 | the specification expressions..... */ | |
1878 | if (gfc_match_char (')') != MATCH_YES) | |
1879 | { | |
1880 | gfc_error ("Missing right parenthesis at %C"); | |
1881 | m = MATCH_ERROR; | |
1882 | goto no_match; | |
1883 | } | |
1884 | ||
1885 | gfc_free_expr (e); | |
1886 | ts->kind = -1; | |
1887 | gfc_function_kind_locus = loc; | |
1888 | gfc_undo_symbols (); | |
1889 | return MATCH_YES; | |
1890 | } | |
1891 | else | |
1892 | { | |
1893 | /* ....or else, the match is real. */ | |
1894 | if (n == MATCH_NO) | |
1895 | gfc_error ("Expected initialization expression at %C"); | |
1896 | if (n != MATCH_YES) | |
1897 | return MATCH_ERROR; | |
1898 | } | |
1899 | } | |
6de9cd9a DN |
1900 | |
1901 | if (e->rank != 0) | |
1902 | { | |
1903 | gfc_error ("Expected scalar initialization expression at %C"); | |
1904 | m = MATCH_ERROR; | |
1905 | goto no_match; | |
1906 | } | |
1907 | ||
1908 | msg = gfc_extract_int (e, &ts->kind); | |
1909 | if (msg != NULL) | |
1910 | { | |
1911 | gfc_error (msg); | |
1912 | m = MATCH_ERROR; | |
1913 | goto no_match; | |
1914 | } | |
1915 | ||
a8b3b0b6 CR |
1916 | /* Before throwing away the expression, let's see if we had a |
1917 | C interoperable kind (and store the fact). */ | |
1918 | if (e->ts.is_c_interop == 1) | |
1919 | { | |
1920 | /* Mark this as c interoperable if being declared with one | |
1921 | of the named constants from iso_c_binding. */ | |
1922 | ts->is_c_interop = e->ts.is_iso_c; | |
1923 | ts->f90_type = e->ts.f90_type; | |
1924 | } | |
1925 | ||
6de9cd9a DN |
1926 | gfc_free_expr (e); |
1927 | e = NULL; | |
1928 | ||
a8b3b0b6 CR |
1929 | /* Ignore errors to this point, if we've gotten here. This means |
1930 | we ignore the m=MATCH_ERROR from above. */ | |
e7a2d5fb | 1931 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a DN |
1932 | { |
1933 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
1934 | gfc_basic_typename (ts->type)); | |
6de9cd9a | 1935 | m = MATCH_ERROR; |
6de9cd9a | 1936 | } |
a8b3b0b6 | 1937 | else if (gfc_match_char (')') != MATCH_YES) |
6de9cd9a | 1938 | { |
8998be20 | 1939 | gfc_error ("Missing right parenthesis at %C"); |
e2d29968 | 1940 | m = MATCH_ERROR; |
6de9cd9a | 1941 | } |
a8b3b0b6 CR |
1942 | else |
1943 | /* All tests passed. */ | |
1944 | m = MATCH_YES; | |
6de9cd9a | 1945 | |
a8b3b0b6 CR |
1946 | if(m == MATCH_ERROR) |
1947 | gfc_current_locus = where; | |
1948 | ||
1949 | /* Return what we know from the test(s). */ | |
1950 | return m; | |
6de9cd9a DN |
1951 | |
1952 | no_match: | |
1953 | gfc_free_expr (e); | |
63645982 | 1954 | gfc_current_locus = where; |
6de9cd9a DN |
1955 | return m; |
1956 | } | |
1957 | ||
1958 | ||
187de1ed FXC |
1959 | static match |
1960 | match_char_kind (int * kind, int * is_iso_c) | |
1961 | { | |
1962 | locus where; | |
1963 | gfc_expr *e; | |
1964 | match m, n; | |
1965 | const char *msg; | |
1966 | ||
1967 | m = MATCH_NO; | |
1968 | e = NULL; | |
1969 | where = gfc_current_locus; | |
1970 | ||
1971 | n = gfc_match_init_expr (&e); | |
1972 | if (n == MATCH_NO) | |
1973 | gfc_error ("Expected initialization expression at %C"); | |
1974 | if (n != MATCH_YES) | |
1975 | return MATCH_ERROR; | |
1976 | ||
1977 | if (e->rank != 0) | |
1978 | { | |
1979 | gfc_error ("Expected scalar initialization expression at %C"); | |
1980 | m = MATCH_ERROR; | |
1981 | goto no_match; | |
1982 | } | |
1983 | ||
1984 | msg = gfc_extract_int (e, kind); | |
1985 | *is_iso_c = e->ts.is_iso_c; | |
1986 | if (msg != NULL) | |
1987 | { | |
1988 | gfc_error (msg); | |
1989 | m = MATCH_ERROR; | |
1990 | goto no_match; | |
1991 | } | |
1992 | ||
1993 | gfc_free_expr (e); | |
1994 | ||
1995 | /* Ignore errors to this point, if we've gotten here. This means | |
1996 | we ignore the m=MATCH_ERROR from above. */ | |
1997 | if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0) | |
1998 | { | |
1999 | gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind); | |
2000 | m = MATCH_ERROR; | |
2001 | } | |
2002 | else | |
2003 | /* All tests passed. */ | |
2004 | m = MATCH_YES; | |
2005 | ||
2006 | if (m == MATCH_ERROR) | |
2007 | gfc_current_locus = where; | |
2008 | ||
2009 | /* Return what we know from the test(s). */ | |
2010 | return m; | |
2011 | ||
2012 | no_match: | |
2013 | gfc_free_expr (e); | |
2014 | gfc_current_locus = where; | |
2015 | return m; | |
2016 | } | |
2017 | ||
6de9cd9a DN |
2018 | /* Match the various kind/length specifications in a CHARACTER |
2019 | declaration. We don't return MATCH_NO. */ | |
2020 | ||
2021 | static match | |
636dff67 | 2022 | match_char_spec (gfc_typespec *ts) |
6de9cd9a | 2023 | { |
187de1ed | 2024 | int kind, seen_length, is_iso_c; |
6de9cd9a DN |
2025 | gfc_charlen *cl; |
2026 | gfc_expr *len; | |
2027 | match m; | |
187de1ed | 2028 | |
6de9cd9a DN |
2029 | len = NULL; |
2030 | seen_length = 0; | |
187de1ed FXC |
2031 | kind = 0; |
2032 | is_iso_c = 0; | |
6de9cd9a DN |
2033 | |
2034 | /* Try the old-style specification first. */ | |
2035 | old_char_selector = 0; | |
2036 | ||
2037 | m = match_char_length (&len); | |
2038 | if (m != MATCH_NO) | |
2039 | { | |
2040 | if (m == MATCH_YES) | |
2041 | old_char_selector = 1; | |
2042 | seen_length = 1; | |
2043 | goto done; | |
2044 | } | |
2045 | ||
2046 | m = gfc_match_char ('('); | |
2047 | if (m != MATCH_YES) | |
2048 | { | |
a8b3b0b6 | 2049 | m = MATCH_YES; /* Character without length is a single char. */ |
6de9cd9a DN |
2050 | goto done; |
2051 | } | |
2052 | ||
a8b3b0b6 | 2053 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ |
6de9cd9a DN |
2054 | if (gfc_match (" kind =") == MATCH_YES) |
2055 | { | |
187de1ed | 2056 | m = match_char_kind (&kind, &is_iso_c); |
a8b3b0b6 | 2057 | |
6de9cd9a DN |
2058 | if (m == MATCH_ERROR) |
2059 | goto done; | |
2060 | if (m == MATCH_NO) | |
2061 | goto syntax; | |
2062 | ||
2063 | if (gfc_match (" , len =") == MATCH_NO) | |
2064 | goto rparen; | |
2065 | ||
2066 | m = char_len_param_value (&len); | |
2067 | if (m == MATCH_NO) | |
2068 | goto syntax; | |
2069 | if (m == MATCH_ERROR) | |
2070 | goto done; | |
2071 | seen_length = 1; | |
2072 | ||
2073 | goto rparen; | |
2074 | } | |
2075 | ||
66e4ab31 | 2076 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ |
6de9cd9a DN |
2077 | if (gfc_match (" len =") == MATCH_YES) |
2078 | { | |
2079 | m = char_len_param_value (&len); | |
2080 | if (m == MATCH_NO) | |
2081 | goto syntax; | |
2082 | if (m == MATCH_ERROR) | |
2083 | goto done; | |
2084 | seen_length = 1; | |
2085 | ||
2086 | if (gfc_match_char (')') == MATCH_YES) | |
2087 | goto done; | |
2088 | ||
2089 | if (gfc_match (" , kind =") != MATCH_YES) | |
2090 | goto syntax; | |
2091 | ||
187de1ed FXC |
2092 | if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR) |
2093 | goto done; | |
6de9cd9a DN |
2094 | |
2095 | goto rparen; | |
2096 | } | |
2097 | ||
66e4ab31 | 2098 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
6de9cd9a DN |
2099 | m = char_len_param_value (&len); |
2100 | if (m == MATCH_NO) | |
2101 | goto syntax; | |
2102 | if (m == MATCH_ERROR) | |
2103 | goto done; | |
2104 | seen_length = 1; | |
2105 | ||
2106 | m = gfc_match_char (')'); | |
2107 | if (m == MATCH_YES) | |
2108 | goto done; | |
2109 | ||
2110 | if (gfc_match_char (',') != MATCH_YES) | |
2111 | goto syntax; | |
2112 | ||
a8b3b0b6 | 2113 | gfc_match (" kind ="); /* Gobble optional text. */ |
6de9cd9a | 2114 | |
187de1ed | 2115 | m = match_char_kind (&kind, &is_iso_c); |
6de9cd9a DN |
2116 | if (m == MATCH_ERROR) |
2117 | goto done; | |
2118 | if (m == MATCH_NO) | |
2119 | goto syntax; | |
2120 | ||
2121 | rparen: | |
2122 | /* Require a right-paren at this point. */ | |
2123 | m = gfc_match_char (')'); | |
2124 | if (m == MATCH_YES) | |
2125 | goto done; | |
2126 | ||
2127 | syntax: | |
2128 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
2129 | m = MATCH_ERROR; | |
16f8ffc8 JD |
2130 | gfc_free_expr (len); |
2131 | return m; | |
6de9cd9a DN |
2132 | |
2133 | done: | |
6de9cd9a DN |
2134 | if (m != MATCH_YES) |
2135 | { | |
2136 | gfc_free_expr (len); | |
2137 | return m; | |
2138 | } | |
2139 | ||
2140 | /* Do some final massaging of the length values. */ | |
2141 | cl = gfc_get_charlen (); | |
2142 | cl->next = gfc_current_ns->cl_list; | |
2143 | gfc_current_ns->cl_list = cl; | |
2144 | ||
2145 | if (seen_length == 0) | |
2146 | cl->length = gfc_int_expr (1); | |
2147 | else | |
5cd09fac | 2148 | cl->length = len; |
6de9cd9a DN |
2149 | |
2150 | ts->cl = cl; | |
187de1ed | 2151 | ts->kind = kind == 0 ? gfc_default_character_kind : kind; |
6de9cd9a | 2152 | |
a8b3b0b6 CR |
2153 | /* We have to know if it was a c interoperable kind so we can |
2154 | do accurate type checking of bind(c) procs, etc. */ | |
187de1ed FXC |
2155 | if (kind != 0) |
2156 | /* Mark this as c interoperable if being declared with one | |
2157 | of the named constants from iso_c_binding. */ | |
2158 | ts->is_c_interop = is_iso_c; | |
a8b3b0b6 | 2159 | else if (len != NULL) |
187de1ed FXC |
2160 | /* Here, we might have parsed something such as: character(c_char) |
2161 | In this case, the parsing code above grabs the c_char when | |
2162 | looking for the length (line 1690, roughly). it's the last | |
2163 | testcase for parsing the kind params of a character variable. | |
2164 | However, it's not actually the length. this seems like it | |
2165 | could be an error. | |
2166 | To see if the user used a C interop kind, test the expr | |
2167 | of the so called length, and see if it's C interoperable. */ | |
2168 | ts->is_c_interop = len->ts.is_iso_c; | |
a8b3b0b6 | 2169 | |
6de9cd9a DN |
2170 | return MATCH_YES; |
2171 | } | |
2172 | ||
2173 | ||
2174 | /* Matches a type specification. If successful, sets the ts structure | |
2175 | to the matched specification. This is necessary for FUNCTION and | |
2176 | IMPLICIT statements. | |
2177 | ||
d51347f9 | 2178 | If implicit_flag is nonzero, then we don't check for the optional |
e5ddaa24 | 2179 | kind specification. Not doing so is needed for matching an IMPLICIT |
6de9cd9a DN |
2180 | statement correctly. */ |
2181 | ||
e2d29968 PT |
2182 | match |
2183 | gfc_match_type_spec (gfc_typespec *ts, int implicit_flag) | |
6de9cd9a DN |
2184 | { |
2185 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2186 | gfc_symbol *sym; | |
2187 | match m; | |
0ff0dfbf | 2188 | int c; |
e2d29968 | 2189 | locus loc = gfc_current_locus; |
6de9cd9a DN |
2190 | |
2191 | gfc_clear_ts (ts); | |
2192 | ||
a8b3b0b6 CR |
2193 | /* Clear the current binding label, in case one is given. */ |
2194 | curr_binding_label[0] = '\0'; | |
2195 | ||
5f700e6d AL |
2196 | if (gfc_match (" byte") == MATCH_YES) |
2197 | { | |
d51347f9 | 2198 | if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C") |
5f700e6d AL |
2199 | == FAILURE) |
2200 | return MATCH_ERROR; | |
2201 | ||
2202 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
2203 | { | |
2204 | gfc_error ("BYTE type used at %C " | |
2205 | "is not available on the target machine"); | |
2206 | return MATCH_ERROR; | |
2207 | } | |
d51347f9 | 2208 | |
5f700e6d AL |
2209 | ts->type = BT_INTEGER; |
2210 | ts->kind = 1; | |
2211 | return MATCH_YES; | |
2212 | } | |
2213 | ||
6de9cd9a DN |
2214 | if (gfc_match (" integer") == MATCH_YES) |
2215 | { | |
2216 | ts->type = BT_INTEGER; | |
9d64df18 | 2217 | ts->kind = gfc_default_integer_kind; |
6de9cd9a DN |
2218 | goto get_kind; |
2219 | } | |
2220 | ||
2221 | if (gfc_match (" character") == MATCH_YES) | |
2222 | { | |
2223 | ts->type = BT_CHARACTER; | |
e5ddaa24 TS |
2224 | if (implicit_flag == 0) |
2225 | return match_char_spec (ts); | |
2226 | else | |
2227 | return MATCH_YES; | |
6de9cd9a DN |
2228 | } |
2229 | ||
2230 | if (gfc_match (" real") == MATCH_YES) | |
2231 | { | |
2232 | ts->type = BT_REAL; | |
9d64df18 | 2233 | ts->kind = gfc_default_real_kind; |
6de9cd9a DN |
2234 | goto get_kind; |
2235 | } | |
2236 | ||
2237 | if (gfc_match (" double precision") == MATCH_YES) | |
2238 | { | |
2239 | ts->type = BT_REAL; | |
9d64df18 | 2240 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
2241 | return MATCH_YES; |
2242 | } | |
2243 | ||
2244 | if (gfc_match (" complex") == MATCH_YES) | |
2245 | { | |
2246 | ts->type = BT_COMPLEX; | |
9d64df18 | 2247 | ts->kind = gfc_default_complex_kind; |
6de9cd9a DN |
2248 | goto get_kind; |
2249 | } | |
2250 | ||
2251 | if (gfc_match (" double complex") == MATCH_YES) | |
2252 | { | |
df8652dc SK |
2253 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
2254 | "conform to the Fortran 95 standard") == FAILURE) | |
2255 | return MATCH_ERROR; | |
2256 | ||
6de9cd9a | 2257 | ts->type = BT_COMPLEX; |
9d64df18 | 2258 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
2259 | return MATCH_YES; |
2260 | } | |
2261 | ||
2262 | if (gfc_match (" logical") == MATCH_YES) | |
2263 | { | |
2264 | ts->type = BT_LOGICAL; | |
9d64df18 | 2265 | ts->kind = gfc_default_logical_kind; |
6de9cd9a DN |
2266 | goto get_kind; |
2267 | } | |
2268 | ||
2269 | m = gfc_match (" type ( %n )", name); | |
2270 | if (m != MATCH_YES) | |
2271 | return m; | |
2272 | ||
e2d29968 PT |
2273 | if (gfc_current_state () == COMP_INTERFACE |
2274 | || gfc_current_state () == COMP_NONE) | |
2275 | { | |
2276 | gfc_function_type_locus = loc; | |
2277 | ts->type = BT_UNKNOWN; | |
2278 | ts->kind = -1; | |
2279 | return MATCH_YES; | |
2280 | } | |
2281 | ||
2282 | /* Search for the name but allow the components to be defined later. If | |
2283 | type = -1, this typespec has been seen in a function declaration but | |
2284 | the type could not legally be accessed at that point. */ | |
2285 | if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym)) | |
6de9cd9a DN |
2286 | { |
2287 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2288 | return MATCH_ERROR; | |
2289 | } | |
e2d29968 PT |
2290 | else if (ts->kind == -1) |
2291 | { | |
2292 | if (gfc_find_symbol (name, NULL, 0, &sym)) | |
2293 | { | |
2294 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2295 | return MATCH_ERROR; | |
2296 | } | |
2297 | ||
2298 | if (sym == NULL) | |
2299 | return MATCH_NO; | |
2300 | } | |
6de9cd9a DN |
2301 | |
2302 | if (sym->attr.flavor != FL_DERIVED | |
231b2fcc | 2303 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
2304 | return MATCH_ERROR; |
2305 | ||
2306 | ts->type = BT_DERIVED; | |
2307 | ts->kind = 0; | |
2308 | ts->derived = sym; | |
2309 | ||
2310 | return MATCH_YES; | |
2311 | ||
2312 | get_kind: | |
2313 | /* For all types except double, derived and character, look for an | |
2314 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
e5ddaa24 | 2315 | if (implicit_flag == 1) |
6de9cd9a DN |
2316 | return MATCH_YES; |
2317 | ||
0ff0dfbf TS |
2318 | if (gfc_current_form == FORM_FREE) |
2319 | { | |
2320 | c = gfc_peek_char(); | |
2321 | if (!gfc_is_whitespace(c) && c != '*' && c != '(' | |
636dff67 | 2322 | && c != ':' && c != ',') |
0ff0dfbf TS |
2323 | return MATCH_NO; |
2324 | } | |
2325 | ||
e2d29968 | 2326 | m = gfc_match_kind_spec (ts, false); |
6de9cd9a DN |
2327 | if (m == MATCH_NO && ts->type != BT_CHARACTER) |
2328 | m = gfc_match_old_kind_spec (ts); | |
2329 | ||
2330 | if (m == MATCH_NO) | |
2331 | m = MATCH_YES; /* No kind specifier found. */ | |
2332 | ||
2333 | return m; | |
2334 | } | |
2335 | ||
2336 | ||
e5ddaa24 TS |
2337 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
2338 | already matched in parse.c, or we would not end up here in the | |
2339 | first place. So the only thing we need to check, is if there is | |
2340 | trailing garbage. If not, the match is successful. */ | |
2341 | ||
2342 | match | |
2343 | gfc_match_implicit_none (void) | |
2344 | { | |
e5ddaa24 TS |
2345 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
2346 | } | |
2347 | ||
2348 | ||
2349 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
2350 | ||
2351 | static match | |
1107b970 | 2352 | match_implicit_range (void) |
e5ddaa24 TS |
2353 | { |
2354 | int c, c1, c2, inner; | |
2355 | locus cur_loc; | |
2356 | ||
2357 | cur_loc = gfc_current_locus; | |
2358 | ||
2359 | gfc_gobble_whitespace (); | |
2360 | c = gfc_next_char (); | |
2361 | if (c != '(') | |
2362 | { | |
2363 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
2364 | goto bad; | |
2365 | } | |
2366 | ||
2367 | inner = 1; | |
2368 | while (inner) | |
2369 | { | |
2370 | gfc_gobble_whitespace (); | |
2371 | c1 = gfc_next_char (); | |
2372 | if (!ISALPHA (c1)) | |
2373 | goto bad; | |
2374 | ||
2375 | gfc_gobble_whitespace (); | |
2376 | c = gfc_next_char (); | |
2377 | ||
2378 | switch (c) | |
2379 | { | |
2380 | case ')': | |
66e4ab31 | 2381 | inner = 0; /* Fall through. */ |
e5ddaa24 TS |
2382 | |
2383 | case ',': | |
2384 | c2 = c1; | |
2385 | break; | |
2386 | ||
2387 | case '-': | |
2388 | gfc_gobble_whitespace (); | |
2389 | c2 = gfc_next_char (); | |
2390 | if (!ISALPHA (c2)) | |
2391 | goto bad; | |
2392 | ||
2393 | gfc_gobble_whitespace (); | |
2394 | c = gfc_next_char (); | |
2395 | ||
2396 | if ((c != ',') && (c != ')')) | |
2397 | goto bad; | |
2398 | if (c == ')') | |
2399 | inner = 0; | |
2400 | ||
2401 | break; | |
2402 | ||
2403 | default: | |
2404 | goto bad; | |
2405 | } | |
2406 | ||
2407 | if (c1 > c2) | |
2408 | { | |
2409 | gfc_error ("Letters must be in alphabetic order in " | |
2410 | "IMPLICIT statement at %C"); | |
2411 | goto bad; | |
2412 | } | |
2413 | ||
2414 | /* See if we can add the newly matched range to the pending | |
636dff67 SK |
2415 | implicits from this IMPLICIT statement. We do not check for |
2416 | conflicts with whatever earlier IMPLICIT statements may have | |
2417 | set. This is done when we've successfully finished matching | |
2418 | the current one. */ | |
1107b970 | 2419 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
e5ddaa24 TS |
2420 | goto bad; |
2421 | } | |
2422 | ||
2423 | return MATCH_YES; | |
2424 | ||
2425 | bad: | |
2426 | gfc_syntax_error (ST_IMPLICIT); | |
2427 | ||
2428 | gfc_current_locus = cur_loc; | |
2429 | return MATCH_ERROR; | |
2430 | } | |
2431 | ||
2432 | ||
2433 | /* Match an IMPLICIT statement, storing the types for | |
2434 | gfc_set_implicit() if the statement is accepted by the parser. | |
2435 | There is a strange looking, but legal syntactic construction | |
2436 | possible. It looks like: | |
2437 | ||
2438 | IMPLICIT INTEGER (a-b) (c-d) | |
2439 | ||
2440 | This is legal if "a-b" is a constant expression that happens to | |
2441 | equal one of the legal kinds for integers. The real problem | |
2442 | happens with an implicit specification that looks like: | |
2443 | ||
2444 | IMPLICIT INTEGER (a-b) | |
2445 | ||
2446 | In this case, a typespec matcher that is "greedy" (as most of the | |
2447 | matchers are) gobbles the character range as a kindspec, leaving | |
2448 | nothing left. We therefore have to go a bit more slowly in the | |
2449 | matching process by inhibiting the kindspec checking during | |
2450 | typespec matching and checking for a kind later. */ | |
2451 | ||
2452 | match | |
2453 | gfc_match_implicit (void) | |
2454 | { | |
2455 | gfc_typespec ts; | |
2456 | locus cur_loc; | |
2457 | int c; | |
2458 | match m; | |
2459 | ||
2460 | /* We don't allow empty implicit statements. */ | |
2461 | if (gfc_match_eos () == MATCH_YES) | |
2462 | { | |
2463 | gfc_error ("Empty IMPLICIT statement at %C"); | |
2464 | return MATCH_ERROR; | |
2465 | } | |
2466 | ||
e5ddaa24 TS |
2467 | do |
2468 | { | |
1107b970 PB |
2469 | /* First cleanup. */ |
2470 | gfc_clear_new_implicit (); | |
2471 | ||
e5ddaa24 | 2472 | /* A basic type is mandatory here. */ |
e2d29968 | 2473 | m = gfc_match_type_spec (&ts, 1); |
e5ddaa24 TS |
2474 | if (m == MATCH_ERROR) |
2475 | goto error; | |
2476 | if (m == MATCH_NO) | |
2477 | goto syntax; | |
2478 | ||
2479 | cur_loc = gfc_current_locus; | |
1107b970 | 2480 | m = match_implicit_range (); |
e5ddaa24 TS |
2481 | |
2482 | if (m == MATCH_YES) | |
2483 | { | |
1107b970 | 2484 | /* We may have <TYPE> (<RANGE>). */ |
e5ddaa24 TS |
2485 | gfc_gobble_whitespace (); |
2486 | c = gfc_next_char (); | |
2487 | if ((c == '\n') || (c == ',')) | |
1107b970 PB |
2488 | { |
2489 | /* Check for CHARACTER with no length parameter. */ | |
2490 | if (ts.type == BT_CHARACTER && !ts.cl) | |
2491 | { | |
9d64df18 | 2492 | ts.kind = gfc_default_character_kind; |
1107b970 PB |
2493 | ts.cl = gfc_get_charlen (); |
2494 | ts.cl->next = gfc_current_ns->cl_list; | |
2495 | gfc_current_ns->cl_list = ts.cl; | |
2496 | ts.cl->length = gfc_int_expr (1); | |
2497 | } | |
2498 | ||
2499 | /* Record the Successful match. */ | |
2500 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2501 | return MATCH_ERROR; | |
2502 | continue; | |
2503 | } | |
e5ddaa24 TS |
2504 | |
2505 | gfc_current_locus = cur_loc; | |
2506 | } | |
2507 | ||
1107b970 PB |
2508 | /* Discard the (incorrectly) matched range. */ |
2509 | gfc_clear_new_implicit (); | |
2510 | ||
2511 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
2512 | if (ts.type == BT_CHARACTER) | |
2513 | m = match_char_spec (&ts); | |
2514 | else | |
e5ddaa24 | 2515 | { |
e2d29968 | 2516 | m = gfc_match_kind_spec (&ts, false); |
e5ddaa24 | 2517 | if (m == MATCH_NO) |
1107b970 PB |
2518 | { |
2519 | m = gfc_match_old_kind_spec (&ts); | |
2520 | if (m == MATCH_ERROR) | |
2521 | goto error; | |
2522 | if (m == MATCH_NO) | |
2523 | goto syntax; | |
2524 | } | |
e5ddaa24 | 2525 | } |
1107b970 PB |
2526 | if (m == MATCH_ERROR) |
2527 | goto error; | |
e5ddaa24 | 2528 | |
1107b970 | 2529 | m = match_implicit_range (); |
e5ddaa24 TS |
2530 | if (m == MATCH_ERROR) |
2531 | goto error; | |
2532 | if (m == MATCH_NO) | |
2533 | goto syntax; | |
2534 | ||
2535 | gfc_gobble_whitespace (); | |
2536 | c = gfc_next_char (); | |
2537 | if ((c != '\n') && (c != ',')) | |
2538 | goto syntax; | |
2539 | ||
1107b970 PB |
2540 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2541 | return MATCH_ERROR; | |
e5ddaa24 TS |
2542 | } |
2543 | while (c == ','); | |
2544 | ||
1107b970 | 2545 | return MATCH_YES; |
e5ddaa24 TS |
2546 | |
2547 | syntax: | |
2548 | gfc_syntax_error (ST_IMPLICIT); | |
2549 | ||
2550 | error: | |
2551 | return MATCH_ERROR; | |
2552 | } | |
2553 | ||
66e4ab31 | 2554 | |
8998be20 TB |
2555 | match |
2556 | gfc_match_import (void) | |
2557 | { | |
2558 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2559 | match m; | |
2560 | gfc_symbol *sym; | |
2561 | gfc_symtree *st; | |
2562 | ||
66e4ab31 SK |
2563 | if (gfc_current_ns->proc_name == NULL |
2564 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
8998be20 TB |
2565 | { |
2566 | gfc_error ("IMPORT statement at %C only permitted in " | |
2567 | "an INTERFACE body"); | |
2568 | return MATCH_ERROR; | |
2569 | } | |
2570 | ||
636dff67 | 2571 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
8998be20 TB |
2572 | == FAILURE) |
2573 | return MATCH_ERROR; | |
2574 | ||
2575 | if (gfc_match_eos () == MATCH_YES) | |
2576 | { | |
2577 | /* All host variables should be imported. */ | |
2578 | gfc_current_ns->has_import_set = 1; | |
2579 | return MATCH_YES; | |
2580 | } | |
2581 | ||
2582 | if (gfc_match (" ::") == MATCH_YES) | |
2583 | { | |
2584 | if (gfc_match_eos () == MATCH_YES) | |
636dff67 SK |
2585 | { |
2586 | gfc_error ("Expecting list of named entities at %C"); | |
2587 | return MATCH_ERROR; | |
2588 | } | |
8998be20 TB |
2589 | } |
2590 | ||
2591 | for(;;) | |
2592 | { | |
2593 | m = gfc_match (" %n", name); | |
2594 | switch (m) | |
2595 | { | |
2596 | case MATCH_YES: | |
36d3fb4c | 2597 | if (gfc_current_ns->parent != NULL |
66e4ab31 | 2598 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
36d3fb4c PT |
2599 | { |
2600 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2601 | return MATCH_ERROR; | |
2602 | } | |
2603 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
66e4ab31 SK |
2604 | && gfc_find_symbol (name, |
2605 | gfc_current_ns->proc_name->ns->parent, | |
2606 | 1, &sym)) | |
636dff67 SK |
2607 | { |
2608 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2609 | return MATCH_ERROR; | |
2610 | } | |
2611 | ||
2612 | if (sym == NULL) | |
2613 | { | |
2614 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2615 | "at %C - does not exist.", name); | |
2616 | return MATCH_ERROR; | |
2617 | } | |
2618 | ||
d51347f9 | 2619 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) |
636dff67 SK |
2620 | { |
2621 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2622 | "at %C.", name); | |
2623 | goto next_item; | |
2624 | } | |
2625 | ||
2626 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
2627 | st->n.sym = sym; | |
2628 | sym->refs++; | |
5a8af0b4 | 2629 | sym->attr.imported = 1; |
8998be20 TB |
2630 | |
2631 | goto next_item; | |
2632 | ||
2633 | case MATCH_NO: | |
2634 | break; | |
2635 | ||
2636 | case MATCH_ERROR: | |
2637 | return MATCH_ERROR; | |
2638 | } | |
2639 | ||
2640 | next_item: | |
2641 | if (gfc_match_eos () == MATCH_YES) | |
2642 | break; | |
2643 | if (gfc_match_char (',') != MATCH_YES) | |
2644 | goto syntax; | |
2645 | } | |
2646 | ||
2647 | return MATCH_YES; | |
2648 | ||
2649 | syntax: | |
2650 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2651 | return MATCH_ERROR; | |
2652 | } | |
e5ddaa24 | 2653 | |
66e4ab31 | 2654 | |
f2449db4 RS |
2655 | /* A minimal implementation of gfc_match without whitespace, escape |
2656 | characters or variable arguments. Returns true if the next | |
2657 | characters match the TARGET template exactly. */ | |
2658 | ||
2659 | static bool | |
2660 | match_string_p (const char *target) | |
2661 | { | |
2662 | const char *p; | |
2663 | ||
2664 | for (p = target; *p; p++) | |
2665 | if (gfc_next_char () != *p) | |
2666 | return false; | |
2667 | return true; | |
2668 | } | |
2669 | ||
6de9cd9a DN |
2670 | /* Matches an attribute specification including array specs. If |
2671 | successful, leaves the variables current_attr and current_as | |
2672 | holding the specification. Also sets the colon_seen variable for | |
2673 | later use by matchers associated with initializations. | |
2674 | ||
2675 | This subroutine is a little tricky in the sense that we don't know | |
2676 | if we really have an attr-spec until we hit the double colon. | |
2677 | Until that time, we can only return MATCH_NO. This forces us to | |
2678 | check for duplicate specification at this level. */ | |
2679 | ||
2680 | static match | |
2681 | match_attr_spec (void) | |
2682 | { | |
6de9cd9a DN |
2683 | /* Modifiers that can exist in a type statement. */ |
2684 | typedef enum | |
2685 | { GFC_DECL_BEGIN = 0, | |
2686 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
2687 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
ee7e677f TB |
2688 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
2689 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
f2449db4 | 2690 | DECL_IS_BIND_C, DECL_NONE, |
6de9cd9a DN |
2691 | GFC_DECL_END /* Sentinel */ |
2692 | } | |
2693 | decl_types; | |
2694 | ||
2695 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
2696 | #define NUM_DECL GFC_DECL_END | |
2697 | ||
6de9cd9a DN |
2698 | locus start, seen_at[NUM_DECL]; |
2699 | int seen[NUM_DECL]; | |
2700 | decl_types d; | |
2701 | const char *attr; | |
2702 | match m; | |
2703 | try t; | |
2704 | ||
2705 | gfc_clear_attr (¤t_attr); | |
63645982 | 2706 | start = gfc_current_locus; |
6de9cd9a DN |
2707 | |
2708 | current_as = NULL; | |
2709 | colon_seen = 0; | |
2710 | ||
2711 | /* See if we get all of the keywords up to the final double colon. */ | |
2712 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2713 | seen[d] = 0; | |
2714 | ||
2715 | for (;;) | |
2716 | { | |
f2449db4 | 2717 | int ch; |
a8b3b0b6 | 2718 | |
f2449db4 RS |
2719 | d = DECL_NONE; |
2720 | gfc_gobble_whitespace (); | |
2721 | ||
2722 | ch = gfc_next_char (); | |
2723 | if (ch == ':') | |
2724 | { | |
2725 | /* This is the successful exit condition for the loop. */ | |
2726 | if (gfc_next_char () == ':') | |
2727 | break; | |
2728 | } | |
2729 | else if (ch == ',') | |
a8b3b0b6 | 2730 | { |
a8b3b0b6 | 2731 | gfc_gobble_whitespace (); |
f2449db4 | 2732 | switch (gfc_peek_char ()) |
a8b3b0b6 | 2733 | { |
f2449db4 RS |
2734 | case 'a': |
2735 | if (match_string_p ("allocatable")) | |
2736 | d = DECL_ALLOCATABLE; | |
2737 | break; | |
2738 | ||
2739 | case 'b': | |
a8b3b0b6 | 2740 | /* Try and match the bind(c). */ |
1eabf70a | 2741 | m = gfc_match_bind_c (NULL, true); |
129d15a3 | 2742 | if (m == MATCH_YES) |
a8b3b0b6 | 2743 | d = DECL_IS_BIND_C; |
129d15a3 JW |
2744 | else if (m == MATCH_ERROR) |
2745 | goto cleanup; | |
f2449db4 RS |
2746 | break; |
2747 | ||
2748 | case 'd': | |
2749 | if (match_string_p ("dimension")) | |
2750 | d = DECL_DIMENSION; | |
2751 | break; | |
2752 | ||
2753 | case 'e': | |
2754 | if (match_string_p ("external")) | |
2755 | d = DECL_EXTERNAL; | |
2756 | break; | |
2757 | ||
2758 | case 'i': | |
2759 | if (match_string_p ("int")) | |
2760 | { | |
2761 | ch = gfc_next_char (); | |
2762 | if (ch == 'e') | |
2763 | { | |
2764 | if (match_string_p ("nt")) | |
2765 | { | |
2766 | /* Matched "intent". */ | |
2767 | /* TODO: Call match_intent_spec from here. */ | |
2768 | if (gfc_match (" ( in out )") == MATCH_YES) | |
2769 | d = DECL_INOUT; | |
2770 | else if (gfc_match (" ( in )") == MATCH_YES) | |
2771 | d = DECL_IN; | |
2772 | else if (gfc_match (" ( out )") == MATCH_YES) | |
2773 | d = DECL_OUT; | |
2774 | } | |
2775 | } | |
2776 | else if (ch == 'r') | |
2777 | { | |
2778 | if (match_string_p ("insic")) | |
2779 | { | |
2780 | /* Matched "intrinsic". */ | |
2781 | d = DECL_INTRINSIC; | |
2782 | } | |
2783 | } | |
2784 | } | |
2785 | break; | |
2786 | ||
2787 | case 'o': | |
2788 | if (match_string_p ("optional")) | |
2789 | d = DECL_OPTIONAL; | |
2790 | break; | |
2791 | ||
2792 | case 'p': | |
2793 | gfc_next_char (); | |
2794 | switch (gfc_next_char ()) | |
2795 | { | |
2796 | case 'a': | |
2797 | if (match_string_p ("rameter")) | |
2798 | { | |
2799 | /* Matched "parameter". */ | |
2800 | d = DECL_PARAMETER; | |
2801 | } | |
2802 | break; | |
2803 | ||
2804 | case 'o': | |
2805 | if (match_string_p ("inter")) | |
2806 | { | |
2807 | /* Matched "pointer". */ | |
2808 | d = DECL_POINTER; | |
2809 | } | |
2810 | break; | |
2811 | ||
2812 | case 'r': | |
2813 | ch = gfc_next_char (); | |
2814 | if (ch == 'i') | |
2815 | { | |
2816 | if (match_string_p ("vate")) | |
2817 | { | |
2818 | /* Matched "private". */ | |
2819 | d = DECL_PRIVATE; | |
2820 | } | |
2821 | } | |
2822 | else if (ch == 'o') | |
2823 | { | |
2824 | if (match_string_p ("tected")) | |
2825 | { | |
2826 | /* Matched "protected". */ | |
2827 | d = DECL_PROTECTED; | |
2828 | } | |
2829 | } | |
2830 | break; | |
2831 | ||
2832 | case 'u': | |
2833 | if (match_string_p ("blic")) | |
2834 | { | |
2835 | /* Matched "public". */ | |
2836 | d = DECL_PUBLIC; | |
2837 | } | |
2838 | break; | |
2839 | } | |
2840 | break; | |
2841 | ||
2842 | case 's': | |
2843 | if (match_string_p ("save")) | |
2844 | d = DECL_SAVE; | |
2845 | break; | |
2846 | ||
2847 | case 't': | |
2848 | if (match_string_p ("target")) | |
2849 | d = DECL_TARGET; | |
2850 | break; | |
2851 | ||
2852 | case 'v': | |
2853 | gfc_next_char (); | |
2854 | ch = gfc_next_char (); | |
2855 | if (ch == 'a') | |
2856 | { | |
2857 | if (match_string_p ("lue")) | |
2858 | { | |
2859 | /* Matched "value". */ | |
2860 | d = DECL_VALUE; | |
2861 | } | |
2862 | } | |
2863 | else if (ch == 'o') | |
2864 | { | |
2865 | if (match_string_p ("latile")) | |
2866 | { | |
2867 | /* Matched "volatile". */ | |
2868 | d = DECL_VOLATILE; | |
2869 | } | |
2870 | } | |
2871 | break; | |
a8b3b0b6 CR |
2872 | } |
2873 | } | |
d468bcdb | 2874 | |
f2449db4 RS |
2875 | /* No double colon and no recognizable decl_type, so assume that |
2876 | we've been looking at something else the whole time. */ | |
2877 | if (d == DECL_NONE) | |
2878 | { | |
2879 | m = MATCH_NO; | |
2880 | goto cleanup; | |
2881 | } | |
d51347f9 | 2882 | |
6de9cd9a | 2883 | seen[d]++; |
63645982 | 2884 | seen_at[d] = gfc_current_locus; |
6de9cd9a DN |
2885 | |
2886 | if (d == DECL_DIMENSION) | |
2887 | { | |
2888 | m = gfc_match_array_spec (¤t_as); | |
2889 | ||
2890 | if (m == MATCH_NO) | |
2891 | { | |
2892 | gfc_error ("Missing dimension specification at %C"); | |
2893 | m = MATCH_ERROR; | |
2894 | } | |
2895 | ||
2896 | if (m == MATCH_ERROR) | |
2897 | goto cleanup; | |
2898 | } | |
2899 | } | |
2900 | ||
6de9cd9a DN |
2901 | /* Since we've seen a double colon, we have to be looking at an |
2902 | attr-spec. This means that we can now issue errors. */ | |
2903 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2904 | if (seen[d] > 1) | |
2905 | { | |
2906 | switch (d) | |
2907 | { | |
2908 | case DECL_ALLOCATABLE: | |
2909 | attr = "ALLOCATABLE"; | |
2910 | break; | |
2911 | case DECL_DIMENSION: | |
2912 | attr = "DIMENSION"; | |
2913 | break; | |
2914 | case DECL_EXTERNAL: | |
2915 | attr = "EXTERNAL"; | |
2916 | break; | |
2917 | case DECL_IN: | |
2918 | attr = "INTENT (IN)"; | |
2919 | break; | |
2920 | case DECL_OUT: | |
2921 | attr = "INTENT (OUT)"; | |
2922 | break; | |
2923 | case DECL_INOUT: | |
2924 | attr = "INTENT (IN OUT)"; | |
2925 | break; | |
2926 | case DECL_INTRINSIC: | |
2927 | attr = "INTRINSIC"; | |
2928 | break; | |
2929 | case DECL_OPTIONAL: | |
2930 | attr = "OPTIONAL"; | |
2931 | break; | |
2932 | case DECL_PARAMETER: | |
2933 | attr = "PARAMETER"; | |
2934 | break; | |
2935 | case DECL_POINTER: | |
2936 | attr = "POINTER"; | |
2937 | break; | |
ee7e677f TB |
2938 | case DECL_PROTECTED: |
2939 | attr = "PROTECTED"; | |
2940 | break; | |
6de9cd9a DN |
2941 | case DECL_PRIVATE: |
2942 | attr = "PRIVATE"; | |
2943 | break; | |
2944 | case DECL_PUBLIC: | |
2945 | attr = "PUBLIC"; | |
2946 | break; | |
2947 | case DECL_SAVE: | |
2948 | attr = "SAVE"; | |
2949 | break; | |
2950 | case DECL_TARGET: | |
2951 | attr = "TARGET"; | |
2952 | break; | |
a8b3b0b6 CR |
2953 | case DECL_IS_BIND_C: |
2954 | attr = "IS_BIND_C"; | |
2955 | break; | |
2956 | case DECL_VALUE: | |
2957 | attr = "VALUE"; | |
2958 | break; | |
775e6c3a TB |
2959 | case DECL_VOLATILE: |
2960 | attr = "VOLATILE"; | |
2961 | break; | |
6de9cd9a | 2962 | default: |
66e4ab31 | 2963 | attr = NULL; /* This shouldn't happen. */ |
6de9cd9a DN |
2964 | } |
2965 | ||
2966 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
2967 | m = MATCH_ERROR; | |
2968 | goto cleanup; | |
2969 | } | |
2970 | ||
2971 | /* Now that we've dealt with duplicate attributes, add the attributes | |
2972 | to the current attribute. */ | |
2973 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2974 | { | |
2975 | if (seen[d] == 0) | |
2976 | continue; | |
2977 | ||
2978 | if (gfc_current_state () == COMP_DERIVED | |
2979 | && d != DECL_DIMENSION && d != DECL_POINTER | |
f2449db4 RS |
2980 | && d != DECL_PRIVATE && d != DECL_PUBLIC |
2981 | && d != DECL_NONE) | |
6de9cd9a | 2982 | { |
5046aff5 PT |
2983 | if (d == DECL_ALLOCATABLE) |
2984 | { | |
636dff67 SK |
2985 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
2986 | "attribute at %C in a TYPE definition") | |
d51347f9 | 2987 | == FAILURE) |
5046aff5 PT |
2988 | { |
2989 | m = MATCH_ERROR; | |
2990 | goto cleanup; | |
2991 | } | |
636dff67 SK |
2992 | } |
2993 | else | |
5046aff5 PT |
2994 | { |
2995 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
d51347f9 | 2996 | &seen_at[d]); |
5046aff5 PT |
2997 | m = MATCH_ERROR; |
2998 | goto cleanup; | |
2999 | } | |
6de9cd9a DN |
3000 | } |
3001 | ||
4213f93b | 3002 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
636dff67 | 3003 | && gfc_current_state () != COMP_MODULE) |
4213f93b PT |
3004 | { |
3005 | if (d == DECL_PRIVATE) | |
3006 | attr = "PRIVATE"; | |
3007 | else | |
3008 | attr = "PUBLIC"; | |
d51347f9 TB |
3009 | if (gfc_current_state () == COMP_DERIVED |
3010 | && gfc_state_stack->previous | |
3011 | && gfc_state_stack->previous->state == COMP_MODULE) | |
3012 | { | |
3013 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s " | |
3014 | "at %L in a TYPE definition", attr, | |
3015 | &seen_at[d]) | |
3016 | == FAILURE) | |
3017 | { | |
3018 | m = MATCH_ERROR; | |
3019 | goto cleanup; | |
3020 | } | |
3021 | } | |
3022 | else | |
3023 | { | |
3024 | gfc_error ("%s attribute at %L is not allowed outside of the " | |
3025 | "specification part of a module", attr, &seen_at[d]); | |
3026 | m = MATCH_ERROR; | |
3027 | goto cleanup; | |
3028 | } | |
4213f93b PT |
3029 | } |
3030 | ||
6de9cd9a DN |
3031 | switch (d) |
3032 | { | |
3033 | case DECL_ALLOCATABLE: | |
3034 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
3035 | break; | |
3036 | ||
3037 | case DECL_DIMENSION: | |
231b2fcc | 3038 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
3039 | break; |
3040 | ||
3041 | case DECL_EXTERNAL: | |
3042 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
3043 | break; | |
3044 | ||
3045 | case DECL_IN: | |
3046 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
3047 | break; | |
3048 | ||
3049 | case DECL_OUT: | |
3050 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
3051 | break; | |
3052 | ||
3053 | case DECL_INOUT: | |
3054 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
3055 | break; | |
3056 | ||
3057 | case DECL_INTRINSIC: | |
3058 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
3059 | break; | |
3060 | ||
3061 | case DECL_OPTIONAL: | |
3062 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
3063 | break; | |
3064 | ||
3065 | case DECL_PARAMETER: | |
231b2fcc | 3066 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
6de9cd9a DN |
3067 | break; |
3068 | ||
3069 | case DECL_POINTER: | |
3070 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
3071 | break; | |
3072 | ||
ee7e677f TB |
3073 | case DECL_PROTECTED: |
3074 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
3075 | { | |
3076 | gfc_error ("PROTECTED at %C only allowed in specification " | |
3077 | "part of a module"); | |
3078 | t = FAILURE; | |
3079 | break; | |
3080 | } | |
3081 | ||
636dff67 SK |
3082 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
3083 | "attribute at %C") | |
ee7e677f TB |
3084 | == FAILURE) |
3085 | t = FAILURE; | |
3086 | else | |
3087 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
3088 | break; | |
3089 | ||
6de9cd9a | 3090 | case DECL_PRIVATE: |
231b2fcc TS |
3091 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
3092 | &seen_at[d]); | |
6de9cd9a DN |
3093 | break; |
3094 | ||
3095 | case DECL_PUBLIC: | |
231b2fcc TS |
3096 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
3097 | &seen_at[d]); | |
6de9cd9a DN |
3098 | break; |
3099 | ||
3100 | case DECL_SAVE: | |
231b2fcc | 3101 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
3102 | break; |
3103 | ||
3104 | case DECL_TARGET: | |
3105 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
3106 | break; | |
3107 | ||
a8b3b0b6 CR |
3108 | case DECL_IS_BIND_C: |
3109 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); | |
3110 | break; | |
3111 | ||
06469efd | 3112 | case DECL_VALUE: |
636dff67 SK |
3113 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
3114 | "at %C") | |
06469efd PT |
3115 | == FAILURE) |
3116 | t = FAILURE; | |
3117 | else | |
3118 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
3119 | break; | |
3120 | ||
775e6c3a TB |
3121 | case DECL_VOLATILE: |
3122 | if (gfc_notify_std (GFC_STD_F2003, | |
636dff67 | 3123 | "Fortran 2003: VOLATILE attribute at %C") |
775e6c3a TB |
3124 | == FAILURE) |
3125 | t = FAILURE; | |
3126 | else | |
3127 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
3128 | break; | |
3129 | ||
6de9cd9a DN |
3130 | default: |
3131 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
3132 | } | |
3133 | ||
3134 | if (t == FAILURE) | |
3135 | { | |
3136 | m = MATCH_ERROR; | |
3137 | goto cleanup; | |
3138 | } | |
3139 | } | |
3140 | ||
3141 | colon_seen = 1; | |
3142 | return MATCH_YES; | |
3143 | ||
3144 | cleanup: | |
63645982 | 3145 | gfc_current_locus = start; |
6de9cd9a DN |
3146 | gfc_free_array_spec (current_as); |
3147 | current_as = NULL; | |
3148 | return m; | |
3149 | } | |
3150 | ||
3151 | ||
a8b3b0b6 CR |
3152 | /* Set the binding label, dest_label, either with the binding label |
3153 | stored in the given gfc_typespec, ts, or if none was provided, it | |
3154 | will be the symbol name in all lower case, as required by the draft | |
3155 | (J3/04-007, section 15.4.1). If a binding label was given and | |
3156 | there is more than one argument (num_idents), it is an error. */ | |
3157 | ||
3158 | try | |
3159 | set_binding_label (char *dest_label, const char *sym_name, int num_idents) | |
3160 | { | |
ad4a2f64 | 3161 | if (num_idents > 1 && has_name_equals) |
a8b3b0b6 | 3162 | { |
ad4a2f64 TB |
3163 | gfc_error ("Multiple identifiers provided with " |
3164 | "single NAME= specifier at %C"); | |
3165 | return FAILURE; | |
3166 | } | |
a8b3b0b6 | 3167 | |
ad4a2f64 TB |
3168 | if (curr_binding_label[0] != '\0') |
3169 | { | |
a8b3b0b6 | 3170 | /* Binding label given; store in temp holder til have sym. */ |
c5b5a17a | 3171 | strcpy (dest_label, curr_binding_label); |
a8b3b0b6 CR |
3172 | } |
3173 | else | |
3174 | { | |
3175 | /* No binding label given, and the NAME= specifier did not exist, | |
3176 | which means there was no NAME="". */ | |
3177 | if (sym_name != NULL && has_name_equals == 0) | |
c5b5a17a | 3178 | strcpy (dest_label, sym_name); |
a8b3b0b6 CR |
3179 | } |
3180 | ||
3181 | return SUCCESS; | |
3182 | } | |
3183 | ||
3184 | ||
3185 | /* Set the status of the given common block as being BIND(C) or not, | |
3186 | depending on the given parameter, is_bind_c. */ | |
3187 | ||
3188 | void | |
3189 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) | |
3190 | { | |
3191 | com_block->is_bind_c = is_bind_c; | |
3192 | return; | |
3193 | } | |
3194 | ||
3195 | ||
3196 | /* Verify that the given gfc_typespec is for a C interoperable type. */ | |
3197 | ||
3198 | try | |
3199 | verify_c_interop (gfc_typespec *ts, const char *name, locus *where) | |
3200 | { | |
3201 | try t; | |
3202 | ||
3203 | /* Make sure the kind used is appropriate for the type. | |
3204 | The f90_type is unknown if an integer constant was | |
3205 | used (e.g., real(4), bind(c) :: myFloat). */ | |
3206 | if (ts->f90_type != BT_UNKNOWN) | |
3207 | { | |
3208 | t = gfc_validate_c_kind (ts); | |
3209 | if (t != SUCCESS) | |
3210 | { | |
3211 | /* Print an error, but continue parsing line. */ | |
3212 | gfc_error_now ("C kind parameter is for type %s but " | |
3213 | "symbol '%s' at %L is of type %s", | |
3214 | gfc_basic_typename (ts->f90_type), | |
3215 | name, where, | |
3216 | gfc_basic_typename (ts->type)); | |
3217 | } | |
3218 | } | |
3219 | ||
3220 | /* Make sure the kind is C interoperable. This does not care about the | |
3221 | possible error above. */ | |
3222 | if (ts->type == BT_DERIVED && ts->derived != NULL) | |
3223 | return (ts->derived->ts.is_c_interop ? SUCCESS : FAILURE); | |
3224 | else if (ts->is_c_interop != 1) | |
3225 | return FAILURE; | |
3226 | ||
3227 | return SUCCESS; | |
3228 | } | |
3229 | ||
3230 | ||
3231 | /* Verify that the variables of a given common block, which has been | |
3232 | defined with the attribute specifier bind(c), to be of a C | |
3233 | interoperable type. Errors will be reported here, if | |
3234 | encountered. */ | |
3235 | ||
3236 | try | |
3237 | verify_com_block_vars_c_interop (gfc_common_head *com_block) | |
3238 | { | |
3239 | gfc_symbol *curr_sym = NULL; | |
3240 | try retval = SUCCESS; | |
3241 | ||
3242 | curr_sym = com_block->head; | |
3243 | ||
3244 | /* Make sure we have at least one symbol. */ | |
3245 | if (curr_sym == NULL) | |
3246 | return retval; | |
3247 | ||
3248 | /* Here we know we have a symbol, so we'll execute this loop | |
3249 | at least once. */ | |
3250 | do | |
3251 | { | |
3252 | /* The second to last param, 1, says this is in a common block. */ | |
3253 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); | |
3254 | curr_sym = curr_sym->common_next; | |
3255 | } while (curr_sym != NULL); | |
3256 | ||
3257 | return retval; | |
3258 | } | |
3259 | ||
3260 | ||
3261 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, | |
3262 | an appropriate error message is reported. */ | |
3263 | ||
3264 | try | |
3265 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, | |
3266 | int is_in_common, gfc_common_head *com_block) | |
3267 | { | |
3268 | try retval = SUCCESS; | |
d8fa96e0 CR |
3269 | |
3270 | if (tmp_sym->attr.function && tmp_sym->result != NULL) | |
3271 | { | |
3272 | tmp_sym = tmp_sym->result; | |
3273 | /* Make sure it wasn't an implicitly typed result. */ | |
3274 | if (tmp_sym->attr.implicit_type) | |
3275 | { | |
3276 | gfc_warning ("Implicitly declared BIND(C) function '%s' at " | |
3277 | "%L may not be C interoperable", tmp_sym->name, | |
3278 | &tmp_sym->declared_at); | |
3279 | tmp_sym->ts.f90_type = tmp_sym->ts.type; | |
3280 | /* Mark it as C interoperable to prevent duplicate warnings. */ | |
3281 | tmp_sym->ts.is_c_interop = 1; | |
3282 | tmp_sym->attr.is_c_interop = 1; | |
3283 | } | |
3284 | } | |
a8b3b0b6 CR |
3285 | |
3286 | /* Here, we know we have the bind(c) attribute, so if we have | |
3287 | enough type info, then verify that it's a C interop kind. | |
3288 | The info could be in the symbol already, or possibly still in | |
3289 | the given ts (current_ts), so look in both. */ | |
3290 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) | |
3291 | { | |
3292 | if (verify_c_interop (&(tmp_sym->ts), tmp_sym->name, | |
3293 | &(tmp_sym->declared_at)) != SUCCESS) | |
3294 | { | |
3295 | /* See if we're dealing with a sym in a common block or not. */ | |
3296 | if (is_in_common == 1) | |
3297 | { | |
3298 | gfc_warning ("Variable '%s' in common block '%s' at %L " | |
3299 | "may not be a C interoperable " | |
3300 | "kind though common block '%s' is BIND(C)", | |
3301 | tmp_sym->name, com_block->name, | |
3302 | &(tmp_sym->declared_at), com_block->name); | |
3303 | } | |
3304 | else | |
3305 | { | |
3306 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) | |
3307 | gfc_error ("Type declaration '%s' at %L is not C " | |
3308 | "interoperable but it is BIND(C)", | |
3309 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3310 | else | |
3311 | gfc_warning ("Variable '%s' at %L " | |
3312 | "may not be a C interoperable " | |
3313 | "kind but it is bind(c)", | |
3314 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3315 | } | |
3316 | } | |
3317 | ||
3318 | /* Variables declared w/in a common block can't be bind(c) | |
3319 | since there's no way for C to see these variables, so there's | |
3320 | semantically no reason for the attribute. */ | |
3321 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) | |
3322 | { | |
3323 | gfc_error ("Variable '%s' in common block '%s' at " | |
3324 | "%L cannot be declared with BIND(C) " | |
3325 | "since it is not a global", | |
3326 | tmp_sym->name, com_block->name, | |
3327 | &(tmp_sym->declared_at)); | |
3328 | retval = FAILURE; | |
3329 | } | |
3330 | ||
3331 | /* Scalar variables that are bind(c) can not have the pointer | |
3332 | or allocatable attributes. */ | |
3333 | if (tmp_sym->attr.is_bind_c == 1) | |
3334 | { | |
3335 | if (tmp_sym->attr.pointer == 1) | |
3336 | { | |
3337 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3338 | "POINTER and BIND(C) attributes", | |
3339 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3340 | retval = FAILURE; | |
3341 | } | |
3342 | ||
3343 | if (tmp_sym->attr.allocatable == 1) | |
3344 | { | |
3345 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3346 | "ALLOCATABLE and BIND(C) attributes", | |
3347 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3348 | retval = FAILURE; | |
3349 | } | |
3350 | ||
3351 | /* If it is a BIND(C) function, make sure the return value is a | |
3352 | scalar value. The previous tests in this function made sure | |
3353 | the type is interoperable. */ | |
3354 | if (tmp_sym->attr.function == 1 && tmp_sym->as != NULL) | |
3355 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3356 | "be an array", tmp_sym->name, &(tmp_sym->declared_at)); | |
3357 | ||
3358 | /* BIND(C) functions can not return a character string. */ | |
3359 | if (tmp_sym->attr.function == 1 && tmp_sym->ts.type == BT_CHARACTER) | |
3360 | if (tmp_sym->ts.cl == NULL || tmp_sym->ts.cl->length == NULL | |
3361 | || tmp_sym->ts.cl->length->expr_type != EXPR_CONSTANT | |
3362 | || mpz_cmp_si (tmp_sym->ts.cl->length->value.integer, 1) != 0) | |
3363 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3364 | "be a character string", tmp_sym->name, | |
3365 | &(tmp_sym->declared_at)); | |
3366 | } | |
3367 | } | |
3368 | ||
3369 | /* See if the symbol has been marked as private. If it has, make sure | |
3370 | there is no binding label and warn the user if there is one. */ | |
3371 | if (tmp_sym->attr.access == ACCESS_PRIVATE | |
3372 | && tmp_sym->binding_label[0] != '\0') | |
3373 | /* Use gfc_warning_now because we won't say that the symbol fails | |
3374 | just because of this. */ | |
3375 | gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " | |
3376 | "given the binding label '%s'", tmp_sym->name, | |
3377 | &(tmp_sym->declared_at), tmp_sym->binding_label); | |
3378 | ||
3379 | return retval; | |
3380 | } | |
3381 | ||
3382 | ||
3383 | /* Set the appropriate fields for a symbol that's been declared as | |
3384 | BIND(C) (the is_bind_c flag and the binding label), and verify that | |
3385 | the type is C interoperable. Errors are reported by the functions | |
3386 | used to set/test these fields. */ | |
3387 | ||
3388 | try | |
3389 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) | |
3390 | { | |
3391 | try retval = SUCCESS; | |
3392 | ||
3393 | /* TODO: Do we need to make sure the vars aren't marked private? */ | |
3394 | ||
3395 | /* Set the is_bind_c bit in symbol_attribute. */ | |
3396 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); | |
3397 | ||
3398 | if (set_binding_label (tmp_sym->binding_label, tmp_sym->name, | |
3399 | num_idents) != SUCCESS) | |
3400 | return FAILURE; | |
3401 | ||
3402 | return retval; | |
3403 | } | |
3404 | ||
3405 | ||
3406 | /* Set the fields marking the given common block as BIND(C), including | |
3407 | a binding label, and report any errors encountered. */ | |
3408 | ||
3409 | try | |
3410 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) | |
3411 | { | |
3412 | try retval = SUCCESS; | |
3413 | ||
3414 | /* destLabel, common name, typespec (which may have binding label). */ | |
3415 | if (set_binding_label (com_block->binding_label, com_block->name, num_idents) | |
3416 | != SUCCESS) | |
3417 | return FAILURE; | |
3418 | ||
3419 | /* Set the given common block (com_block) to being bind(c) (1). */ | |
3420 | set_com_block_bind_c (com_block, 1); | |
3421 | ||
3422 | return retval; | |
3423 | } | |
3424 | ||
3425 | ||
3426 | /* Retrieve the list of one or more identifiers that the given bind(c) | |
3427 | attribute applies to. */ | |
3428 | ||
3429 | try | |
3430 | get_bind_c_idents (void) | |
3431 | { | |
3432 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3433 | int num_idents = 0; | |
3434 | gfc_symbol *tmp_sym = NULL; | |
3435 | match found_id; | |
3436 | gfc_common_head *com_block = NULL; | |
3437 | ||
3438 | if (gfc_match_name (name) == MATCH_YES) | |
3439 | { | |
3440 | found_id = MATCH_YES; | |
3441 | gfc_get_ha_symbol (name, &tmp_sym); | |
3442 | } | |
3443 | else if (match_common_name (name) == MATCH_YES) | |
3444 | { | |
3445 | found_id = MATCH_YES; | |
3446 | com_block = gfc_get_common (name, 0); | |
3447 | } | |
3448 | else | |
3449 | { | |
3450 | gfc_error ("Need either entity or common block name for " | |
3451 | "attribute specification statement at %C"); | |
3452 | return FAILURE; | |
3453 | } | |
3454 | ||
3455 | /* Save the current identifier and look for more. */ | |
3456 | do | |
3457 | { | |
3458 | /* Increment the number of identifiers found for this spec stmt. */ | |
3459 | num_idents++; | |
3460 | ||
3461 | /* Make sure we have a sym or com block, and verify that it can | |
3462 | be bind(c). Set the appropriate field(s) and look for more | |
3463 | identifiers. */ | |
3464 | if (tmp_sym != NULL || com_block != NULL) | |
3465 | { | |
3466 | if (tmp_sym != NULL) | |
3467 | { | |
3468 | if (set_verify_bind_c_sym (tmp_sym, num_idents) | |
3469 | != SUCCESS) | |
3470 | return FAILURE; | |
3471 | } | |
3472 | else | |
3473 | { | |
3474 | if (set_verify_bind_c_com_block(com_block, num_idents) | |
3475 | != SUCCESS) | |
3476 | return FAILURE; | |
3477 | } | |
3478 | ||
3479 | /* Look to see if we have another identifier. */ | |
3480 | tmp_sym = NULL; | |
3481 | if (gfc_match_eos () == MATCH_YES) | |
3482 | found_id = MATCH_NO; | |
3483 | else if (gfc_match_char (',') != MATCH_YES) | |
3484 | found_id = MATCH_NO; | |
3485 | else if (gfc_match_name (name) == MATCH_YES) | |
3486 | { | |
3487 | found_id = MATCH_YES; | |
3488 | gfc_get_ha_symbol (name, &tmp_sym); | |
3489 | } | |
3490 | else if (match_common_name (name) == MATCH_YES) | |
3491 | { | |
3492 | found_id = MATCH_YES; | |
3493 | com_block = gfc_get_common (name, 0); | |
3494 | } | |
3495 | else | |
3496 | { | |
3497 | gfc_error ("Missing entity or common block name for " | |
3498 | "attribute specification statement at %C"); | |
3499 | return FAILURE; | |
3500 | } | |
3501 | } | |
3502 | else | |
3503 | { | |
3504 | gfc_internal_error ("Missing symbol"); | |
3505 | } | |
3506 | } while (found_id == MATCH_YES); | |
3507 | ||
3508 | /* if we get here we were successful */ | |
3509 | return SUCCESS; | |
3510 | } | |
3511 | ||
3512 | ||
3513 | /* Try and match a BIND(C) attribute specification statement. */ | |
3514 | ||
3515 | match | |
3516 | gfc_match_bind_c_stmt (void) | |
3517 | { | |
3518 | match found_match = MATCH_NO; | |
3519 | gfc_typespec *ts; | |
3520 | ||
3521 | ts = ¤t_ts; | |
3522 | ||
3523 | /* This may not be necessary. */ | |
3524 | gfc_clear_ts (ts); | |
3525 | /* Clear the temporary binding label holder. */ | |
3526 | curr_binding_label[0] = '\0'; | |
3527 | ||
3528 | /* Look for the bind(c). */ | |
1eabf70a | 3529 | found_match = gfc_match_bind_c (NULL, true); |
a8b3b0b6 CR |
3530 | |
3531 | if (found_match == MATCH_YES) | |
3532 | { | |
3533 | /* Look for the :: now, but it is not required. */ | |
3534 | gfc_match (" :: "); | |
3535 | ||
3536 | /* Get the identifier(s) that needs to be updated. This may need to | |
3537 | change to hand the flag(s) for the attr specified so all identifiers | |
3538 | found can have all appropriate parts updated (assuming that the same | |
3539 | spec stmt can have multiple attrs, such as both bind(c) and | |
3540 | allocatable...). */ | |
3541 | if (get_bind_c_idents () != SUCCESS) | |
3542 | /* Error message should have printed already. */ | |
3543 | return MATCH_ERROR; | |
3544 | } | |
3545 | ||
3546 | return found_match; | |
3547 | } | |
3548 | ||
3549 | ||
6de9cd9a DN |
3550 | /* Match a data declaration statement. */ |
3551 | ||
3552 | match | |
3553 | gfc_match_data_decl (void) | |
3554 | { | |
3555 | gfc_symbol *sym; | |
3556 | match m; | |
949d5b72 | 3557 | int elem; |
6de9cd9a | 3558 | |
a8b3b0b6 CR |
3559 | num_idents_on_line = 0; |
3560 | ||
e2d29968 | 3561 | m = gfc_match_type_spec (¤t_ts, 0); |
6de9cd9a DN |
3562 | if (m != MATCH_YES) |
3563 | return m; | |
3564 | ||
3565 | if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) | |
3566 | { | |
3567 | sym = gfc_use_derived (current_ts.derived); | |
3568 | ||
3569 | if (sym == NULL) | |
3570 | { | |
3571 | m = MATCH_ERROR; | |
3572 | goto cleanup; | |
3573 | } | |
3574 | ||
3575 | current_ts.derived = sym; | |
3576 | } | |
3577 | ||
3578 | m = match_attr_spec (); | |
3579 | if (m == MATCH_ERROR) | |
3580 | { | |
3581 | m = MATCH_NO; | |
3582 | goto cleanup; | |
3583 | } | |
3584 | ||
9fa6b0af FXC |
3585 | if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL |
3586 | && !current_ts.derived->attr.zero_comp) | |
6de9cd9a DN |
3587 | { |
3588 | ||
3589 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
3590 | goto ok; | |
3591 | ||
976e21f6 | 3592 | gfc_find_symbol (current_ts.derived->name, |
636dff67 | 3593 | current_ts.derived->ns->parent, 1, &sym); |
6de9cd9a | 3594 | |
976e21f6 | 3595 | /* Any symbol that we find had better be a type definition |
636dff67 | 3596 | which has its components defined. */ |
976e21f6 | 3597 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
9fa6b0af FXC |
3598 | && (current_ts.derived->components != NULL |
3599 | || current_ts.derived->attr.zero_comp)) | |
6de9cd9a DN |
3600 | goto ok; |
3601 | ||
976e21f6 PT |
3602 | /* Now we have an error, which we signal, and then fix up |
3603 | because the knock-on is plain and simple confusing. */ | |
3604 | gfc_error_now ("Derived type at %C has not been previously defined " | |
636dff67 | 3605 | "and so cannot appear in a derived type definition"); |
976e21f6 PT |
3606 | current_attr.pointer = 1; |
3607 | goto ok; | |
6de9cd9a DN |
3608 | } |
3609 | ||
3610 | ok: | |
3611 | /* If we have an old-style character declaration, and no new-style | |
3612 | attribute specifications, then there a comma is optional between | |
3613 | the type specification and the variable list. */ | |
3614 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
3615 | gfc_match_char (','); | |
3616 | ||
949d5b72 PT |
3617 | /* Give the types/attributes to symbols that follow. Give the element |
3618 | a number so that repeat character length expressions can be copied. */ | |
3619 | elem = 1; | |
6de9cd9a DN |
3620 | for (;;) |
3621 | { | |
a8b3b0b6 | 3622 | num_idents_on_line++; |
949d5b72 | 3623 | m = variable_decl (elem++); |
6de9cd9a DN |
3624 | if (m == MATCH_ERROR) |
3625 | goto cleanup; | |
3626 | if (m == MATCH_NO) | |
3627 | break; | |
3628 | ||
3629 | if (gfc_match_eos () == MATCH_YES) | |
3630 | goto cleanup; | |
3631 | if (gfc_match_char (',') != MATCH_YES) | |
3632 | break; | |
3633 | } | |
3634 | ||
8f81c3c6 PT |
3635 | if (gfc_error_flag_test () == 0) |
3636 | gfc_error ("Syntax error in data declaration at %C"); | |
6de9cd9a DN |
3637 | m = MATCH_ERROR; |
3638 | ||
a9f6f1f2 JD |
3639 | gfc_free_data_all (gfc_current_ns); |
3640 | ||
6de9cd9a DN |
3641 | cleanup: |
3642 | gfc_free_array_spec (current_as); | |
3643 | current_as = NULL; | |
3644 | return m; | |
3645 | } | |
3646 | ||
3647 | ||
3648 | /* Match a prefix associated with a function or subroutine | |
3649 | declaration. If the typespec pointer is nonnull, then a typespec | |
3650 | can be matched. Note that if nothing matches, MATCH_YES is | |
3651 | returned (the null string was matched). */ | |
3652 | ||
3653 | static match | |
636dff67 | 3654 | match_prefix (gfc_typespec *ts) |
6de9cd9a DN |
3655 | { |
3656 | int seen_type; | |
3657 | ||
3658 | gfc_clear_attr (¤t_attr); | |
3659 | seen_type = 0; | |
3660 | ||
3661 | loop: | |
3662 | if (!seen_type && ts != NULL | |
e2d29968 | 3663 | && gfc_match_type_spec (ts, 0) == MATCH_YES |
6de9cd9a DN |
3664 | && gfc_match_space () == MATCH_YES) |
3665 | { | |
3666 | ||
3667 | seen_type = 1; | |
3668 | goto loop; | |
3669 | } | |
3670 | ||
3671 | if (gfc_match ("elemental% ") == MATCH_YES) | |
3672 | { | |
3673 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
3674 | return MATCH_ERROR; | |
3675 | ||
3676 | goto loop; | |
3677 | } | |
3678 | ||
3679 | if (gfc_match ("pure% ") == MATCH_YES) | |
3680 | { | |
3681 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
3682 | return MATCH_ERROR; | |
3683 | ||
3684 | goto loop; | |
3685 | } | |
3686 | ||
3687 | if (gfc_match ("recursive% ") == MATCH_YES) | |
3688 | { | |
3689 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
3690 | return MATCH_ERROR; | |
3691 | ||
3692 | goto loop; | |
3693 | } | |
3694 | ||
3695 | /* At this point, the next item is not a prefix. */ | |
3696 | return MATCH_YES; | |
3697 | } | |
3698 | ||
3699 | ||
3700 | /* Copy attributes matched by match_prefix() to attributes on a symbol. */ | |
3701 | ||
3702 | static try | |
636dff67 | 3703 | copy_prefix (symbol_attribute *dest, locus *where) |
6de9cd9a | 3704 | { |
6de9cd9a DN |
3705 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
3706 | return FAILURE; | |
3707 | ||
3708 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
3709 | return FAILURE; | |
3710 | ||
3711 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
3712 | return FAILURE; | |
3713 | ||
3714 | return SUCCESS; | |
3715 | } | |
3716 | ||
3717 | ||
3718 | /* Match a formal argument list. */ | |
3719 | ||
3720 | match | |
636dff67 | 3721 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
6de9cd9a DN |
3722 | { |
3723 | gfc_formal_arglist *head, *tail, *p, *q; | |
3724 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3725 | gfc_symbol *sym; | |
3726 | match m; | |
3727 | ||
3728 | head = tail = NULL; | |
3729 | ||
3730 | if (gfc_match_char ('(') != MATCH_YES) | |
3731 | { | |
3732 | if (null_flag) | |
3733 | goto ok; | |
3734 | return MATCH_NO; | |
3735 | } | |
3736 | ||
3737 | if (gfc_match_char (')') == MATCH_YES) | |
3738 | goto ok; | |
3739 | ||
3740 | for (;;) | |
3741 | { | |
3742 | if (gfc_match_char ('*') == MATCH_YES) | |
3743 | sym = NULL; | |
3744 | else | |
3745 | { | |
3746 | m = gfc_match_name (name); | |
3747 | if (m != MATCH_YES) | |
3748 | goto cleanup; | |
3749 | ||
3750 | if (gfc_get_symbol (name, NULL, &sym)) | |
3751 | goto cleanup; | |
3752 | } | |
3753 | ||
3754 | p = gfc_get_formal_arglist (); | |
3755 | ||
3756 | if (head == NULL) | |
3757 | head = tail = p; | |
3758 | else | |
3759 | { | |
3760 | tail->next = p; | |
3761 | tail = p; | |
3762 | } | |
3763 | ||
3764 | tail->sym = sym; | |
3765 | ||
3766 | /* We don't add the VARIABLE flavor because the name could be a | |
636dff67 SK |
3767 | dummy procedure. We don't apply these attributes to formal |
3768 | arguments of statement functions. */ | |
6de9cd9a | 3769 | if (sym != NULL && !st_flag |
231b2fcc | 3770 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
6de9cd9a DN |
3771 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
3772 | { | |
3773 | m = MATCH_ERROR; | |
3774 | goto cleanup; | |
3775 | } | |
3776 | ||
3777 | /* The name of a program unit can be in a different namespace, | |
636dff67 SK |
3778 | so check for it explicitly. After the statement is accepted, |
3779 | the name is checked for especially in gfc_get_symbol(). */ | |
6de9cd9a DN |
3780 | if (gfc_new_block != NULL && sym != NULL |
3781 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
3782 | { | |
3783 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
3784 | sym->name); | |
3785 | m = MATCH_ERROR; | |
3786 | goto cleanup; | |
3787 | } | |
3788 | ||
3789 | if (gfc_match_char (')') == MATCH_YES) | |
3790 | goto ok; | |
3791 | ||
3792 | m = gfc_match_char (','); | |
3793 | if (m != MATCH_YES) | |
3794 | { | |
3795 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
3796 | goto cleanup; | |
3797 | } | |
3798 | } | |
3799 | ||
3800 | ok: | |
3801 | /* Check for duplicate symbols in the formal argument list. */ | |
3802 | if (head != NULL) | |
3803 | { | |
3804 | for (p = head; p->next; p = p->next) | |
3805 | { | |
3806 | if (p->sym == NULL) | |
3807 | continue; | |
3808 | ||
3809 | for (q = p->next; q; q = q->next) | |
3810 | if (p->sym == q->sym) | |
3811 | { | |
636dff67 SK |
3812 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
3813 | "at %C", p->sym->name); | |
6de9cd9a DN |
3814 | |
3815 | m = MATCH_ERROR; | |
3816 | goto cleanup; | |
3817 | } | |
3818 | } | |
3819 | } | |
3820 | ||
66e4ab31 SK |
3821 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) |
3822 | == FAILURE) | |
6de9cd9a DN |
3823 | { |
3824 | m = MATCH_ERROR; | |
3825 | goto cleanup; | |
3826 | } | |
3827 | ||
3828 | return MATCH_YES; | |
3829 | ||
3830 | cleanup: | |
3831 | gfc_free_formal_arglist (head); | |
3832 | return m; | |
3833 | } | |
3834 | ||
3835 | ||
3836 | /* Match a RESULT specification following a function declaration or | |
3837 | ENTRY statement. Also matches the end-of-statement. */ | |
3838 | ||
3839 | static match | |
66e4ab31 | 3840 | match_result (gfc_symbol *function, gfc_symbol **result) |
6de9cd9a DN |
3841 | { |
3842 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3843 | gfc_symbol *r; | |
3844 | match m; | |
3845 | ||
3846 | if (gfc_match (" result (") != MATCH_YES) | |
3847 | return MATCH_NO; | |
3848 | ||
3849 | m = gfc_match_name (name); | |
3850 | if (m != MATCH_YES) | |
3851 | return m; | |
3852 | ||
a8b3b0b6 CR |
3853 | /* Get the right paren, and that's it because there could be the |
3854 | bind(c) attribute after the result clause. */ | |
3855 | if (gfc_match_char(')') != MATCH_YES) | |
6de9cd9a | 3856 | { |
a8b3b0b6 | 3857 | /* TODO: should report the missing right paren here. */ |
6de9cd9a DN |
3858 | return MATCH_ERROR; |
3859 | } | |
3860 | ||
3861 | if (strcmp (function->name, name) == 0) | |
3862 | { | |
636dff67 | 3863 | gfc_error ("RESULT variable at %C must be different than function name"); |
6de9cd9a DN |
3864 | return MATCH_ERROR; |
3865 | } | |
3866 | ||
3867 | if (gfc_get_symbol (name, NULL, &r)) | |
3868 | return MATCH_ERROR; | |
3869 | ||
231b2fcc TS |
3870 | if (gfc_add_flavor (&r->attr, FL_VARIABLE, r->name, NULL) == FAILURE |
3871 | || gfc_add_result (&r->attr, r->name, NULL) == FAILURE) | |
6de9cd9a DN |
3872 | return MATCH_ERROR; |
3873 | ||
3874 | *result = r; | |
3875 | ||
3876 | return MATCH_YES; | |
3877 | } | |
3878 | ||
3879 | ||
a8b3b0b6 CR |
3880 | /* Match a function suffix, which could be a combination of a result |
3881 | clause and BIND(C), either one, or neither. The draft does not | |
3882 | require them to come in a specific order. */ | |
3883 | ||
3884 | match | |
3885 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) | |
3886 | { | |
3887 | match is_bind_c; /* Found bind(c). */ | |
3888 | match is_result; /* Found result clause. */ | |
3889 | match found_match; /* Status of whether we've found a good match. */ | |
3890 | int peek_char; /* Character we're going to peek at. */ | |
1eabf70a | 3891 | bool allow_binding_name; |
a8b3b0b6 CR |
3892 | |
3893 | /* Initialize to having found nothing. */ | |
3894 | found_match = MATCH_NO; | |
3895 | is_bind_c = MATCH_NO; | |
3896 | is_result = MATCH_NO; | |
3897 | ||
3898 | /* Get the next char to narrow between result and bind(c). */ | |
3899 | gfc_gobble_whitespace (); | |
3900 | peek_char = gfc_peek_char (); | |
3901 | ||
1eabf70a TB |
3902 | /* C binding names are not allowed for internal procedures. */ |
3903 | if (gfc_current_state () == COMP_CONTAINS | |
3904 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
3905 | allow_binding_name = false; | |
3906 | else | |
3907 | allow_binding_name = true; | |
3908 | ||
a8b3b0b6 CR |
3909 | switch (peek_char) |
3910 | { | |
3911 | case 'r': | |
3912 | /* Look for result clause. */ | |
3913 | is_result = match_result (sym, result); | |
3914 | if (is_result == MATCH_YES) | |
3915 | { | |
3916 | /* Now see if there is a bind(c) after it. */ | |
1eabf70a | 3917 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
a8b3b0b6 CR |
3918 | /* We've found the result clause and possibly bind(c). */ |
3919 | found_match = MATCH_YES; | |
3920 | } | |
3921 | else | |
3922 | /* This should only be MATCH_ERROR. */ | |
3923 | found_match = is_result; | |
3924 | break; | |
3925 | case 'b': | |
3926 | /* Look for bind(c) first. */ | |
1eabf70a | 3927 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
a8b3b0b6 CR |
3928 | if (is_bind_c == MATCH_YES) |
3929 | { | |
3930 | /* Now see if a result clause followed it. */ | |
3931 | is_result = match_result (sym, result); | |
3932 | found_match = MATCH_YES; | |
3933 | } | |
3934 | else | |
3935 | { | |
3936 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ | |
3937 | found_match = MATCH_ERROR; | |
3938 | } | |
3939 | break; | |
3940 | default: | |
3941 | gfc_error ("Unexpected junk after function declaration at %C"); | |
3942 | found_match = MATCH_ERROR; | |
3943 | break; | |
3944 | } | |
3945 | ||
a8b3b0b6 | 3946 | if (is_bind_c == MATCH_YES) |
01f4fff1 | 3947 | { |
1eabf70a | 3948 | /* Fortran 2008 draft allows BIND(C) for internal procedures. */ |
01f4fff1 | 3949 | if (gfc_current_state () == COMP_CONTAINS |
1eabf70a TB |
3950 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
3951 | && gfc_notify_std (GFC_STD_GNU, "Extension: BIND(C) attribute at %L " | |
3952 | "may not be specified for an internal procedure", | |
3953 | &gfc_current_locus) | |
3954 | == FAILURE) | |
3955 | return MATCH_ERROR; | |
3956 | ||
01f4fff1 TB |
3957 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) |
3958 | == FAILURE) | |
3959 | return MATCH_ERROR; | |
3960 | } | |
a8b3b0b6 CR |
3961 | |
3962 | return found_match; | |
3963 | } | |
3964 | ||
3965 | ||
69773742 JW |
3966 | /* Match a PROCEDURE declaration (R1211). */ |
3967 | ||
3968 | static match | |
3969 | match_procedure_decl (void) | |
3970 | { | |
3971 | match m; | |
3972 | locus old_loc, entry_loc; | |
3973 | gfc_symbol *sym, *proc_if = NULL; | |
3974 | int num; | |
3975 | ||
3976 | old_loc = entry_loc = gfc_current_locus; | |
3977 | ||
3978 | gfc_clear_ts (¤t_ts); | |
3979 | ||
3980 | if (gfc_match (" (") != MATCH_YES) | |
3981 | { | |
3982 | gfc_current_locus = entry_loc; | |
3983 | return MATCH_NO; | |
3984 | } | |
3985 | ||
3986 | /* Get the type spec. for the procedure interface. */ | |
3987 | old_loc = gfc_current_locus; | |
e2d29968 | 3988 | m = gfc_match_type_spec (¤t_ts, 0); |
69773742 JW |
3989 | if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_char () == ')')) |
3990 | goto got_ts; | |
3991 | ||
3992 | if (m == MATCH_ERROR) | |
3993 | return m; | |
3994 | ||
3995 | gfc_current_locus = old_loc; | |
3996 | ||
3997 | /* Get the name of the procedure or abstract interface | |
3998 | to inherit the interface from. */ | |
3999 | m = gfc_match_symbol (&proc_if, 1); | |
4000 | ||
4001 | if (m == MATCH_NO) | |
4002 | goto syntax; | |
4003 | else if (m == MATCH_ERROR) | |
4004 | return m; | |
4005 | ||
4006 | /* Various interface checks. */ | |
4007 | if (proc_if) | |
4008 | { | |
bb343a6c TB |
4009 | /* Resolve interface if possible. That way, attr.procedure is only set |
4010 | if it is declared by a later procedure-declaration-stmt, which is | |
4011 | invalid per C1212. */ | |
4012 | while (proc_if->interface) | |
4013 | proc_if = proc_if->interface; | |
4014 | ||
69773742 JW |
4015 | if (proc_if->generic) |
4016 | { | |
4017 | gfc_error ("Interface '%s' at %C may not be generic", proc_if->name); | |
4018 | return MATCH_ERROR; | |
4019 | } | |
4020 | if (proc_if->attr.proc == PROC_ST_FUNCTION) | |
4021 | { | |
4022 | gfc_error ("Interface '%s' at %C may not be a statement function", | |
4023 | proc_if->name); | |
4024 | return MATCH_ERROR; | |
4025 | } | |
4026 | /* Handle intrinsic procedures. */ | |
4027 | if (gfc_intrinsic_name (proc_if->name, 0) | |
4028 | || gfc_intrinsic_name (proc_if->name, 1)) | |
4029 | proc_if->attr.intrinsic = 1; | |
4030 | if (proc_if->attr.intrinsic | |
4031 | && !gfc_intrinsic_actual_ok (proc_if->name, 0)) | |
4032 | { | |
4033 | gfc_error ("Intrinsic procedure '%s' not allowed " | |
4034 | "in PROCEDURE statement at %C", proc_if->name); | |
4035 | return MATCH_ERROR; | |
4036 | } | |
69773742 JW |
4037 | } |
4038 | ||
4039 | got_ts: | |
69773742 JW |
4040 | if (gfc_match (" )") != MATCH_YES) |
4041 | { | |
4042 | gfc_current_locus = entry_loc; | |
4043 | return MATCH_NO; | |
4044 | } | |
4045 | ||
4046 | /* Parse attributes. */ | |
4047 | m = match_attr_spec(); | |
4048 | if (m == MATCH_ERROR) | |
4049 | return MATCH_ERROR; | |
4050 | ||
4051 | /* Get procedure symbols. */ | |
4052 | for(num=1;;num++) | |
4053 | { | |
69773742 JW |
4054 | m = gfc_match_symbol (&sym, 0); |
4055 | if (m == MATCH_NO) | |
4056 | goto syntax; | |
4057 | else if (m == MATCH_ERROR) | |
4058 | return m; | |
4059 | ||
4060 | /* Add current_attr to the symbol attributes. */ | |
4061 | if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
4062 | return MATCH_ERROR; | |
4063 | ||
4064 | if (sym->attr.is_bind_c) | |
4065 | { | |
4066 | /* Check for C1218. */ | |
4067 | if (!proc_if || !proc_if->attr.is_bind_c) | |
4068 | { | |
4069 | gfc_error ("BIND(C) attribute at %C requires " | |
4070 | "an interface with BIND(C)"); | |
4071 | return MATCH_ERROR; | |
4072 | } | |
4073 | /* Check for C1217. */ | |
4074 | if (has_name_equals && sym->attr.pointer) | |
4075 | { | |
4076 | gfc_error ("BIND(C) procedure with NAME may not have " | |
4077 | "POINTER attribute at %C"); | |
4078 | return MATCH_ERROR; | |
4079 | } | |
4080 | if (has_name_equals && sym->attr.dummy) | |
4081 | { | |
4082 | gfc_error ("Dummy procedure at %C may not have " | |
4083 | "BIND(C) attribute with NAME"); | |
4084 | return MATCH_ERROR; | |
4085 | } | |
4086 | /* Set binding label for BIND(C). */ | |
4087 | if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS) | |
4088 | return MATCH_ERROR; | |
4089 | } | |
4090 | ||
4091 | if (!sym->attr.pointer && gfc_add_external (&sym->attr, NULL) == FAILURE) | |
4092 | return MATCH_ERROR; | |
4093 | if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE) | |
4094 | return MATCH_ERROR; | |
4095 | ||
4096 | /* Set interface. */ | |
4097 | if (proc_if != NULL) | |
6cc309c9 JD |
4098 | { |
4099 | sym->interface = proc_if; | |
4100 | sym->attr.untyped = 1; | |
4101 | } | |
69773742 JW |
4102 | else if (current_ts.type != BT_UNKNOWN) |
4103 | { | |
4104 | sym->interface = gfc_new_symbol ("", gfc_current_ns); | |
4105 | sym->interface->ts = current_ts; | |
4106 | sym->interface->attr.function = 1; | |
4107 | sym->ts = sym->interface->ts; | |
4108 | sym->attr.function = sym->interface->attr.function; | |
4109 | } | |
4110 | ||
4111 | if (gfc_match_eos () == MATCH_YES) | |
4112 | return MATCH_YES; | |
4113 | if (gfc_match_char (',') != MATCH_YES) | |
4114 | goto syntax; | |
4115 | } | |
4116 | ||
4117 | syntax: | |
4118 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4119 | return MATCH_ERROR; | |
4120 | } | |
4121 | ||
4122 | ||
4123 | /* Match a PROCEDURE declaration inside an interface (R1206). */ | |
4124 | ||
4125 | static match | |
4126 | match_procedure_in_interface (void) | |
4127 | { | |
4128 | match m; | |
4129 | gfc_symbol *sym; | |
4130 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4131 | ||
4132 | if (current_interface.type == INTERFACE_NAMELESS | |
4133 | || current_interface.type == INTERFACE_ABSTRACT) | |
4134 | { | |
4135 | gfc_error ("PROCEDURE at %C must be in a generic interface"); | |
4136 | return MATCH_ERROR; | |
4137 | } | |
4138 | ||
4139 | for(;;) | |
4140 | { | |
4141 | m = gfc_match_name (name); | |
4142 | if (m == MATCH_NO) | |
4143 | goto syntax; | |
4144 | else if (m == MATCH_ERROR) | |
4145 | return m; | |
4146 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
4147 | return MATCH_ERROR; | |
4148 | ||
4149 | if (gfc_add_interface (sym) == FAILURE) | |
4150 | return MATCH_ERROR; | |
4151 | ||
69773742 JW |
4152 | if (gfc_match_eos () == MATCH_YES) |
4153 | break; | |
4154 | if (gfc_match_char (',') != MATCH_YES) | |
4155 | goto syntax; | |
4156 | } | |
4157 | ||
4158 | return MATCH_YES; | |
4159 | ||
4160 | syntax: | |
4161 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4162 | return MATCH_ERROR; | |
4163 | } | |
4164 | ||
4165 | ||
4166 | /* General matcher for PROCEDURE declarations. */ | |
4167 | ||
4168 | match | |
4169 | gfc_match_procedure (void) | |
4170 | { | |
4171 | match m; | |
4172 | ||
4173 | switch (gfc_current_state ()) | |
4174 | { | |
4175 | case COMP_NONE: | |
4176 | case COMP_PROGRAM: | |
4177 | case COMP_MODULE: | |
4178 | case COMP_SUBROUTINE: | |
4179 | case COMP_FUNCTION: | |
4180 | m = match_procedure_decl (); | |
4181 | break; | |
4182 | case COMP_INTERFACE: | |
4183 | m = match_procedure_in_interface (); | |
4184 | break; | |
4185 | case COMP_DERIVED: | |
4186 | gfc_error ("Fortran 2003: Procedure components at %C are " | |
4187 | "not yet implemented in gfortran"); | |
4188 | return MATCH_ERROR; | |
4189 | default: | |
4190 | return MATCH_NO; | |
4191 | } | |
4192 | ||
4193 | if (m != MATCH_YES) | |
4194 | return m; | |
4195 | ||
4196 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C") | |
4197 | == FAILURE) | |
4198 | return MATCH_ERROR; | |
4199 | ||
4200 | return m; | |
4201 | } | |
4202 | ||
4203 | ||
6de9cd9a DN |
4204 | /* Match a function declaration. */ |
4205 | ||
4206 | match | |
4207 | gfc_match_function_decl (void) | |
4208 | { | |
4209 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4210 | gfc_symbol *sym, *result; | |
4211 | locus old_loc; | |
4212 | match m; | |
a8b3b0b6 CR |
4213 | match suffix_match; |
4214 | match found_match; /* Status returned by match func. */ | |
6de9cd9a DN |
4215 | |
4216 | if (gfc_current_state () != COMP_NONE | |
4217 | && gfc_current_state () != COMP_INTERFACE | |
4218 | && gfc_current_state () != COMP_CONTAINS) | |
4219 | return MATCH_NO; | |
4220 | ||
4221 | gfc_clear_ts (¤t_ts); | |
4222 | ||
63645982 | 4223 | old_loc = gfc_current_locus; |
6de9cd9a DN |
4224 | |
4225 | m = match_prefix (¤t_ts); | |
4226 | if (m != MATCH_YES) | |
4227 | { | |
63645982 | 4228 | gfc_current_locus = old_loc; |
6de9cd9a DN |
4229 | return m; |
4230 | } | |
4231 | ||
4232 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
4233 | { | |
63645982 | 4234 | gfc_current_locus = old_loc; |
6de9cd9a DN |
4235 | return MATCH_NO; |
4236 | } | |
1a492601 | 4237 | if (get_proc_name (name, &sym, false)) |
6de9cd9a DN |
4238 | return MATCH_ERROR; |
4239 | gfc_new_block = sym; | |
4240 | ||
4241 | m = gfc_match_formal_arglist (sym, 0, 0); | |
4242 | if (m == MATCH_NO) | |
2b9a33ae TS |
4243 | { |
4244 | gfc_error ("Expected formal argument list in function " | |
636dff67 | 4245 | "definition at %C"); |
2b9a33ae TS |
4246 | m = MATCH_ERROR; |
4247 | goto cleanup; | |
4248 | } | |
6de9cd9a DN |
4249 | else if (m == MATCH_ERROR) |
4250 | goto cleanup; | |
4251 | ||
4252 | result = NULL; | |
4253 | ||
a8b3b0b6 CR |
4254 | /* According to the draft, the bind(c) and result clause can |
4255 | come in either order after the formal_arg_list (i.e., either | |
4256 | can be first, both can exist together or by themselves or neither | |
4257 | one). Therefore, the match_result can't match the end of the | |
4258 | string, and check for the bind(c) or result clause in either order. */ | |
4259 | found_match = gfc_match_eos (); | |
4260 | ||
4261 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
4262 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4263 | not allowed for procedures. */ | |
4264 | if (sym->attr.is_bind_c == 1) | |
4265 | { | |
4266 | sym->attr.is_bind_c = 0; | |
4267 | if (sym->old_symbol != NULL) | |
4268 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4269 | "variables or common blocks", | |
4270 | &(sym->old_symbol->declared_at)); | |
4271 | else | |
4272 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4273 | "variables or common blocks", &gfc_current_locus); | |
6de9cd9a DN |
4274 | } |
4275 | ||
a8b3b0b6 | 4276 | if (found_match != MATCH_YES) |
6de9cd9a | 4277 | { |
a8b3b0b6 CR |
4278 | /* If we haven't found the end-of-statement, look for a suffix. */ |
4279 | suffix_match = gfc_match_suffix (sym, &result); | |
4280 | if (suffix_match == MATCH_YES) | |
4281 | /* Need to get the eos now. */ | |
4282 | found_match = gfc_match_eos (); | |
4283 | else | |
4284 | found_match = suffix_match; | |
6de9cd9a DN |
4285 | } |
4286 | ||
a8b3b0b6 CR |
4287 | if(found_match != MATCH_YES) |
4288 | m = MATCH_ERROR; | |
6de9cd9a DN |
4289 | else |
4290 | { | |
a8b3b0b6 CR |
4291 | /* Make changes to the symbol. */ |
4292 | m = MATCH_ERROR; | |
4293 | ||
4294 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) | |
4295 | goto cleanup; | |
4296 | ||
4297 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
4298 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4299 | goto cleanup; | |
6de9cd9a | 4300 | |
a8b3b0b6 CR |
4301 | if (current_ts.type != BT_UNKNOWN && sym->ts.type != BT_UNKNOWN |
4302 | && !sym->attr.implicit_type) | |
4303 | { | |
4304 | gfc_error ("Function '%s' at %C already has a type of %s", name, | |
4305 | gfc_basic_typename (sym->ts.type)); | |
4306 | goto cleanup; | |
4307 | } | |
4308 | ||
4309 | if (result == NULL) | |
4310 | { | |
4311 | sym->ts = current_ts; | |
4312 | sym->result = sym; | |
4313 | } | |
4314 | else | |
4315 | { | |
4316 | result->ts = current_ts; | |
4317 | sym->result = result; | |
4318 | } | |
4319 | ||
4320 | return MATCH_YES; | |
4321 | } | |
6de9cd9a DN |
4322 | |
4323 | cleanup: | |
63645982 | 4324 | gfc_current_locus = old_loc; |
6de9cd9a DN |
4325 | return m; |
4326 | } | |
4327 | ||
636dff67 SK |
4328 | |
4329 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
4330 | pass the name of the entry, rather than the gfc_current_block name, and | |
4331 | to return false upon finding an existing global entry. */ | |
68ea355b PT |
4332 | |
4333 | static bool | |
636dff67 | 4334 | add_global_entry (const char *name, int sub) |
68ea355b PT |
4335 | { |
4336 | gfc_gsymbol *s; | |
4337 | ||
4338 | s = gfc_get_gsymbol(name); | |
4339 | ||
4340 | if (s->defined | |
636dff67 SK |
4341 | || (s->type != GSYM_UNKNOWN |
4342 | && s->type != (sub ? GSYM_SUBROUTINE : GSYM_FUNCTION))) | |
ca39e6f2 | 4343 | gfc_global_used(s, NULL); |
68ea355b PT |
4344 | else |
4345 | { | |
4346 | s->type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; | |
4347 | s->where = gfc_current_locus; | |
4348 | s->defined = 1; | |
4349 | return true; | |
4350 | } | |
4351 | return false; | |
4352 | } | |
6de9cd9a | 4353 | |
636dff67 | 4354 | |
6de9cd9a DN |
4355 | /* Match an ENTRY statement. */ |
4356 | ||
4357 | match | |
4358 | gfc_match_entry (void) | |
4359 | { | |
3d79abbd PB |
4360 | gfc_symbol *proc; |
4361 | gfc_symbol *result; | |
4362 | gfc_symbol *entry; | |
6de9cd9a DN |
4363 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
4364 | gfc_compile_state state; | |
4365 | match m; | |
3d79abbd | 4366 | gfc_entry_list *el; |
c96cfa49 | 4367 | locus old_loc; |
1a492601 | 4368 | bool module_procedure; |
bc3e7a8c TB |
4369 | char peek_char; |
4370 | match is_bind_c; | |
6de9cd9a DN |
4371 | |
4372 | m = gfc_match_name (name); | |
4373 | if (m != MATCH_YES) | |
4374 | return m; | |
4375 | ||
3d79abbd | 4376 | state = gfc_current_state (); |
4c93c95a | 4377 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
3d79abbd | 4378 | { |
4c93c95a FXC |
4379 | switch (state) |
4380 | { | |
4381 | case COMP_PROGRAM: | |
4382 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
4383 | break; | |
4384 | case COMP_MODULE: | |
4385 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
4386 | break; | |
4387 | case COMP_BLOCK_DATA: | |
636dff67 SK |
4388 | gfc_error ("ENTRY statement at %C cannot appear within " |
4389 | "a BLOCK DATA"); | |
4c93c95a FXC |
4390 | break; |
4391 | case COMP_INTERFACE: | |
636dff67 SK |
4392 | gfc_error ("ENTRY statement at %C cannot appear within " |
4393 | "an INTERFACE"); | |
4c93c95a FXC |
4394 | break; |
4395 | case COMP_DERIVED: | |
636dff67 SK |
4396 | gfc_error ("ENTRY statement at %C cannot appear within " |
4397 | "a DERIVED TYPE block"); | |
4c93c95a FXC |
4398 | break; |
4399 | case COMP_IF: | |
636dff67 SK |
4400 | gfc_error ("ENTRY statement at %C cannot appear within " |
4401 | "an IF-THEN block"); | |
4c93c95a FXC |
4402 | break; |
4403 | case COMP_DO: | |
636dff67 SK |
4404 | gfc_error ("ENTRY statement at %C cannot appear within " |
4405 | "a DO block"); | |
4c93c95a FXC |
4406 | break; |
4407 | case COMP_SELECT: | |
636dff67 SK |
4408 | gfc_error ("ENTRY statement at %C cannot appear within " |
4409 | "a SELECT block"); | |
4c93c95a FXC |
4410 | break; |
4411 | case COMP_FORALL: | |
636dff67 SK |
4412 | gfc_error ("ENTRY statement at %C cannot appear within " |
4413 | "a FORALL block"); | |
4c93c95a FXC |
4414 | break; |
4415 | case COMP_WHERE: | |
636dff67 SK |
4416 | gfc_error ("ENTRY statement at %C cannot appear within " |
4417 | "a WHERE block"); | |
4c93c95a FXC |
4418 | break; |
4419 | case COMP_CONTAINS: | |
636dff67 SK |
4420 | gfc_error ("ENTRY statement at %C cannot appear within " |
4421 | "a contained subprogram"); | |
4c93c95a FXC |
4422 | break; |
4423 | default: | |
4424 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
4425 | } | |
3d79abbd PB |
4426 | return MATCH_ERROR; |
4427 | } | |
4428 | ||
1a492601 | 4429 | module_procedure = gfc_current_ns->parent != NULL |
636dff67 SK |
4430 | && gfc_current_ns->parent->proc_name |
4431 | && gfc_current_ns->parent->proc_name->attr.flavor | |
4432 | == FL_MODULE; | |
1a492601 | 4433 | |
3d79abbd PB |
4434 | if (gfc_current_ns->parent != NULL |
4435 | && gfc_current_ns->parent->proc_name | |
1a492601 | 4436 | && !module_procedure) |
3d79abbd PB |
4437 | { |
4438 | gfc_error("ENTRY statement at %C cannot appear in a " | |
4439 | "contained procedure"); | |
4440 | return MATCH_ERROR; | |
4441 | } | |
4442 | ||
1a492601 PT |
4443 | /* Module function entries need special care in get_proc_name |
4444 | because previous references within the function will have | |
4445 | created symbols attached to the current namespace. */ | |
4446 | if (get_proc_name (name, &entry, | |
4447 | gfc_current_ns->parent != NULL | |
4448 | && module_procedure | |
4449 | && gfc_current_ns->proc_name->attr.function)) | |
6de9cd9a DN |
4450 | return MATCH_ERROR; |
4451 | ||
3d79abbd PB |
4452 | proc = gfc_current_block (); |
4453 | ||
bc3e7a8c TB |
4454 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
4455 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4456 | not allowed for procedures. */ | |
4457 | if (entry->attr.is_bind_c == 1) | |
4458 | { | |
4459 | entry->attr.is_bind_c = 0; | |
4460 | if (entry->old_symbol != NULL) | |
4461 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4462 | "variables or common blocks", | |
4463 | &(entry->old_symbol->declared_at)); | |
4464 | else | |
4465 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4466 | "variables or common blocks", &gfc_current_locus); | |
4467 | } | |
4468 | ||
4469 | /* Check what next non-whitespace character is so we can tell if there | |
4470 | is the required parens if we have a BIND(C). */ | |
4471 | gfc_gobble_whitespace (); | |
4472 | peek_char = gfc_peek_char (); | |
4473 | ||
3d79abbd | 4474 | if (state == COMP_SUBROUTINE) |
6de9cd9a | 4475 | { |
231b2fcc | 4476 | /* An entry in a subroutine. */ |
182393f4 | 4477 | if (!gfc_current_ns->parent && !add_global_entry (name, 1)) |
68ea355b PT |
4478 | return MATCH_ERROR; |
4479 | ||
6de9cd9a DN |
4480 | m = gfc_match_formal_arglist (entry, 0, 1); |
4481 | if (m != MATCH_YES) | |
4482 | return MATCH_ERROR; | |
4483 | ||
1eabf70a TB |
4484 | /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can |
4485 | never be an internal procedure. */ | |
4486 | is_bind_c = gfc_match_bind_c (entry, true); | |
bc3e7a8c TB |
4487 | if (is_bind_c == MATCH_ERROR) |
4488 | return MATCH_ERROR; | |
4489 | if (is_bind_c == MATCH_YES) | |
4490 | { | |
4491 | if (peek_char != '(') | |
4492 | { | |
4493 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
4494 | return MATCH_ERROR; | |
4495 | } | |
4496 | if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1) | |
4497 | == FAILURE) | |
4498 | return MATCH_ERROR; | |
4499 | } | |
4500 | ||
231b2fcc TS |
4501 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4502 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a | 4503 | return MATCH_ERROR; |
3d79abbd PB |
4504 | } |
4505 | else | |
4506 | { | |
c96cfa49 | 4507 | /* An entry in a function. |
636dff67 SK |
4508 | We need to take special care because writing |
4509 | ENTRY f() | |
4510 | as | |
4511 | ENTRY f | |
4512 | is allowed, whereas | |
4513 | ENTRY f() RESULT (r) | |
4514 | can't be written as | |
4515 | ENTRY f RESULT (r). */ | |
182393f4 | 4516 | if (!gfc_current_ns->parent && !add_global_entry (name, 0)) |
68ea355b PT |
4517 | return MATCH_ERROR; |
4518 | ||
c96cfa49 TS |
4519 | old_loc = gfc_current_locus; |
4520 | if (gfc_match_eos () == MATCH_YES) | |
4521 | { | |
4522 | gfc_current_locus = old_loc; | |
4523 | /* Match the empty argument list, and add the interface to | |
4524 | the symbol. */ | |
4525 | m = gfc_match_formal_arglist (entry, 0, 1); | |
4526 | } | |
4527 | else | |
4528 | m = gfc_match_formal_arglist (entry, 0, 0); | |
4529 | ||
6de9cd9a DN |
4530 | if (m != MATCH_YES) |
4531 | return MATCH_ERROR; | |
4532 | ||
6de9cd9a DN |
4533 | result = NULL; |
4534 | ||
4535 | if (gfc_match_eos () == MATCH_YES) | |
4536 | { | |
231b2fcc TS |
4537 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4538 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a DN |
4539 | return MATCH_ERROR; |
4540 | ||
d198b59a | 4541 | entry->result = entry; |
6de9cd9a DN |
4542 | } |
4543 | else | |
4544 | { | |
bc3e7a8c | 4545 | m = gfc_match_suffix (entry, &result); |
6de9cd9a DN |
4546 | if (m == MATCH_NO) |
4547 | gfc_syntax_error (ST_ENTRY); | |
4548 | if (m != MATCH_YES) | |
4549 | return MATCH_ERROR; | |
4550 | ||
bc3e7a8c TB |
4551 | if (result) |
4552 | { | |
4553 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE | |
4554 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
4555 | || gfc_add_function (&entry->attr, result->name, NULL) | |
4556 | == FAILURE) | |
4557 | return MATCH_ERROR; | |
4558 | entry->result = result; | |
4559 | } | |
4560 | else | |
4561 | { | |
4562 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE | |
4563 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
4564 | return MATCH_ERROR; | |
4565 | entry->result = entry; | |
4566 | } | |
6de9cd9a | 4567 | } |
6de9cd9a DN |
4568 | } |
4569 | ||
4570 | if (gfc_match_eos () != MATCH_YES) | |
4571 | { | |
4572 | gfc_syntax_error (ST_ENTRY); | |
4573 | return MATCH_ERROR; | |
4574 | } | |
4575 | ||
3d79abbd PB |
4576 | entry->attr.recursive = proc->attr.recursive; |
4577 | entry->attr.elemental = proc->attr.elemental; | |
4578 | entry->attr.pure = proc->attr.pure; | |
6de9cd9a | 4579 | |
3d79abbd PB |
4580 | el = gfc_get_entry_list (); |
4581 | el->sym = entry; | |
4582 | el->next = gfc_current_ns->entries; | |
4583 | gfc_current_ns->entries = el; | |
4584 | if (el->next) | |
4585 | el->id = el->next->id + 1; | |
4586 | else | |
4587 | el->id = 1; | |
6de9cd9a | 4588 | |
3d79abbd PB |
4589 | new_st.op = EXEC_ENTRY; |
4590 | new_st.ext.entry = el; | |
4591 | ||
4592 | return MATCH_YES; | |
6de9cd9a DN |
4593 | } |
4594 | ||
4595 | ||
4596 | /* Match a subroutine statement, including optional prefixes. */ | |
4597 | ||
4598 | match | |
4599 | gfc_match_subroutine (void) | |
4600 | { | |
4601 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4602 | gfc_symbol *sym; | |
4603 | match m; | |
a8b3b0b6 CR |
4604 | match is_bind_c; |
4605 | char peek_char; | |
1eabf70a | 4606 | bool allow_binding_name; |
6de9cd9a DN |
4607 | |
4608 | if (gfc_current_state () != COMP_NONE | |
4609 | && gfc_current_state () != COMP_INTERFACE | |
4610 | && gfc_current_state () != COMP_CONTAINS) | |
4611 | return MATCH_NO; | |
4612 | ||
4613 | m = match_prefix (NULL); | |
4614 | if (m != MATCH_YES) | |
4615 | return m; | |
4616 | ||
4617 | m = gfc_match ("subroutine% %n", name); | |
4618 | if (m != MATCH_YES) | |
4619 | return m; | |
4620 | ||
1a492601 | 4621 | if (get_proc_name (name, &sym, false)) |
6de9cd9a DN |
4622 | return MATCH_ERROR; |
4623 | gfc_new_block = sym; | |
4624 | ||
a8b3b0b6 | 4625 | /* Check what next non-whitespace character is so we can tell if there |
bc3e7a8c | 4626 | is the required parens if we have a BIND(C). */ |
a8b3b0b6 CR |
4627 | gfc_gobble_whitespace (); |
4628 | peek_char = gfc_peek_char (); | |
4629 | ||
231b2fcc | 4630 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
4631 | return MATCH_ERROR; |
4632 | ||
4633 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
4634 | return MATCH_ERROR; | |
4635 | ||
a8b3b0b6 CR |
4636 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
4637 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4638 | not allowed for procedures. */ | |
4639 | if (sym->attr.is_bind_c == 1) | |
4640 | { | |
4641 | sym->attr.is_bind_c = 0; | |
4642 | if (sym->old_symbol != NULL) | |
4643 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4644 | "variables or common blocks", | |
4645 | &(sym->old_symbol->declared_at)); | |
4646 | else | |
4647 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4648 | "variables or common blocks", &gfc_current_locus); | |
4649 | } | |
1eabf70a TB |
4650 | |
4651 | /* C binding names are not allowed for internal procedures. */ | |
4652 | if (gfc_current_state () == COMP_CONTAINS | |
4653 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
4654 | allow_binding_name = false; | |
4655 | else | |
4656 | allow_binding_name = true; | |
4657 | ||
a8b3b0b6 CR |
4658 | /* Here, we are just checking if it has the bind(c) attribute, and if |
4659 | so, then we need to make sure it's all correct. If it doesn't, | |
4660 | we still need to continue matching the rest of the subroutine line. */ | |
1eabf70a | 4661 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
a8b3b0b6 CR |
4662 | if (is_bind_c == MATCH_ERROR) |
4663 | { | |
4664 | /* There was an attempt at the bind(c), but it was wrong. An | |
4665 | error message should have been printed w/in the gfc_match_bind_c | |
4666 | so here we'll just return the MATCH_ERROR. */ | |
4667 | return MATCH_ERROR; | |
4668 | } | |
4669 | ||
4670 | if (is_bind_c == MATCH_YES) | |
4671 | { | |
1eabf70a | 4672 | /* The following is allowed in the Fortran 2008 draft. */ |
01f4fff1 | 4673 | if (gfc_current_state () == COMP_CONTAINS |
1eabf70a TB |
4674 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
4675 | && gfc_notify_std (GFC_STD_GNU, "Extension: BIND(C) attribute at " | |
4676 | "%L may not be specified for an internal procedure", | |
4677 | &gfc_current_locus) | |
4678 | == FAILURE) | |
4679 | return MATCH_ERROR; | |
4680 | ||
a8b3b0b6 CR |
4681 | if (peek_char != '(') |
4682 | { | |
4683 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
4684 | return MATCH_ERROR; | |
4685 | } | |
4686 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) | |
4687 | == FAILURE) | |
4688 | return MATCH_ERROR; | |
4689 | } | |
4690 | ||
6de9cd9a DN |
4691 | if (gfc_match_eos () != MATCH_YES) |
4692 | { | |
4693 | gfc_syntax_error (ST_SUBROUTINE); | |
4694 | return MATCH_ERROR; | |
4695 | } | |
4696 | ||
4697 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4698 | return MATCH_ERROR; | |
4699 | ||
4700 | return MATCH_YES; | |
4701 | } | |
4702 | ||
4703 | ||
a8b3b0b6 CR |
4704 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
4705 | given, and set the binding label in either the given symbol (if not | |
86bf520d | 4706 | NULL), or in the current_ts. The symbol may be NULL because we may |
a8b3b0b6 CR |
4707 | encounter the BIND(C) before the declaration itself. Return |
4708 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, | |
4709 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, | |
4710 | or MATCH_YES if the specifier was correct and the binding label and | |
4711 | bind(c) fields were set correctly for the given symbol or the | |
1eabf70a TB |
4712 | current_ts. If allow_binding_name is false, no binding name may be |
4713 | given. */ | |
a8b3b0b6 CR |
4714 | |
4715 | match | |
1eabf70a | 4716 | gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name) |
a8b3b0b6 CR |
4717 | { |
4718 | /* binding label, if exists */ | |
4719 | char binding_label[GFC_MAX_SYMBOL_LEN + 1]; | |
4720 | match double_quote; | |
4721 | match single_quote; | |
a8b3b0b6 CR |
4722 | |
4723 | /* Initialize the flag that specifies whether we encountered a NAME= | |
4724 | specifier or not. */ | |
4725 | has_name_equals = 0; | |
4726 | ||
4727 | /* Init the first char to nil so we can catch if we don't have | |
4728 | the label (name attr) or the symbol name yet. */ | |
4729 | binding_label[0] = '\0'; | |
4730 | ||
4731 | /* This much we have to be able to match, in this order, if | |
4732 | there is a bind(c) label. */ | |
4733 | if (gfc_match (" bind ( c ") != MATCH_YES) | |
4734 | return MATCH_NO; | |
4735 | ||
4736 | /* Now see if there is a binding label, or if we've reached the | |
4737 | end of the bind(c) attribute without one. */ | |
4738 | if (gfc_match_char (',') == MATCH_YES) | |
4739 | { | |
4740 | if (gfc_match (" name = ") != MATCH_YES) | |
4741 | { | |
4742 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
4743 | "at %C"); | |
4744 | /* should give an error message here */ | |
4745 | return MATCH_ERROR; | |
4746 | } | |
4747 | ||
4748 | has_name_equals = 1; | |
4749 | ||
4750 | /* Get the opening quote. */ | |
4751 | double_quote = MATCH_YES; | |
4752 | single_quote = MATCH_YES; | |
4753 | double_quote = gfc_match_char ('"'); | |
4754 | if (double_quote != MATCH_YES) | |
4755 | single_quote = gfc_match_char ('\''); | |
4756 | if (double_quote != MATCH_YES && single_quote != MATCH_YES) | |
4757 | { | |
4758 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
4759 | "at %C"); | |
4760 | return MATCH_ERROR; | |
4761 | } | |
4762 | ||
4763 | /* Grab the binding label, using functions that will not lower | |
4764 | case the names automatically. */ | |
4765 | if (gfc_match_name_C (binding_label) != MATCH_YES) | |
4766 | return MATCH_ERROR; | |
4767 | ||
4768 | /* Get the closing quotation. */ | |
4769 | if (double_quote == MATCH_YES) | |
4770 | { | |
4771 | if (gfc_match_char ('"') != MATCH_YES) | |
4772 | { | |
4773 | gfc_error ("Missing closing quote '\"' for binding label at %C"); | |
4774 | /* User started string with '"' so looked to match it. */ | |
4775 | return MATCH_ERROR; | |
4776 | } | |
4777 | } | |
4778 | else | |
4779 | { | |
4780 | if (gfc_match_char ('\'') != MATCH_YES) | |
4781 | { | |
4782 | gfc_error ("Missing closing quote '\'' for binding label at %C"); | |
4783 | /* User started string with "'" char. */ | |
4784 | return MATCH_ERROR; | |
4785 | } | |
4786 | } | |
4787 | } | |
4788 | ||
4789 | /* Get the required right paren. */ | |
4790 | if (gfc_match_char (')') != MATCH_YES) | |
4791 | { | |
4792 | gfc_error ("Missing closing paren for binding label at %C"); | |
4793 | return MATCH_ERROR; | |
4794 | } | |
4795 | ||
1eabf70a TB |
4796 | if (has_name_equals && !allow_binding_name) |
4797 | { | |
4798 | gfc_error ("No binding name is allowed in BIND(C) at %C"); | |
4799 | return MATCH_ERROR; | |
4800 | } | |
4801 | ||
4802 | if (has_name_equals && sym != NULL && sym->attr.dummy) | |
4803 | { | |
4804 | gfc_error ("For dummy procedure %s, no binding name is " | |
4805 | "allowed in BIND(C) at %C", sym->name); | |
4806 | return MATCH_ERROR; | |
4807 | } | |
4808 | ||
4809 | ||
a8b3b0b6 CR |
4810 | /* Save the binding label to the symbol. If sym is null, we're |
4811 | probably matching the typespec attributes of a declaration and | |
4812 | haven't gotten the name yet, and therefore, no symbol yet. */ | |
4813 | if (binding_label[0] != '\0') | |
4814 | { | |
4815 | if (sym != NULL) | |
4816 | { | |
c5b5a17a | 4817 | strcpy (sym->binding_label, binding_label); |
a8b3b0b6 CR |
4818 | } |
4819 | else | |
c5b5a17a | 4820 | strcpy (curr_binding_label, binding_label); |
a8b3b0b6 | 4821 | } |
1eabf70a | 4822 | else if (allow_binding_name) |
a8b3b0b6 CR |
4823 | { |
4824 | /* No binding label, but if symbol isn't null, we | |
1eabf70a TB |
4825 | can set the label for it here. |
4826 | If name="" or allow_binding_name is false, no C binding name is | |
4827 | created. */ | |
a8b3b0b6 CR |
4828 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) |
4829 | strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1); | |
4830 | } | |
9e1d712c | 4831 | |
129d15a3 JW |
4832 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
4833 | && current_interface.type == INTERFACE_ABSTRACT) | |
9e1d712c TB |
4834 | { |
4835 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); | |
4836 | return MATCH_ERROR; | |
4837 | } | |
4838 | ||
a8b3b0b6 CR |
4839 | return MATCH_YES; |
4840 | } | |
4841 | ||
4842 | ||
1f2959f0 | 4843 | /* Return nonzero if we're currently compiling a contained procedure. */ |
ddc9ce91 TS |
4844 | |
4845 | static int | |
4846 | contained_procedure (void) | |
4847 | { | |
4848 | gfc_state_data *s; | |
4849 | ||
4850 | for (s=gfc_state_stack; s; s=s->previous) | |
4851 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) | |
636dff67 | 4852 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) |
ddc9ce91 TS |
4853 | return 1; |
4854 | ||
4855 | return 0; | |
4856 | } | |
4857 | ||
d51347f9 | 4858 | /* Set the kind of each enumerator. The kind is selected such that it is |
25d8f0a2 TS |
4859 | interoperable with the corresponding C enumeration type, making |
4860 | sure that -fshort-enums is honored. */ | |
4861 | ||
4862 | static void | |
4863 | set_enum_kind(void) | |
4864 | { | |
4865 | enumerator_history *current_history = NULL; | |
4866 | int kind; | |
4867 | int i; | |
4868 | ||
4869 | if (max_enum == NULL || enum_history == NULL) | |
4870 | return; | |
4871 | ||
4872 | if (!gfc_option.fshort_enums) | |
d51347f9 TB |
4873 | return; |
4874 | ||
25d8f0a2 TS |
4875 | i = 0; |
4876 | do | |
4877 | { | |
4878 | kind = gfc_integer_kinds[i++].kind; | |
4879 | } | |
d51347f9 | 4880 | while (kind < gfc_c_int_kind |
25d8f0a2 TS |
4881 | && gfc_check_integer_range (max_enum->initializer->value.integer, |
4882 | kind) != ARITH_OK); | |
4883 | ||
4884 | current_history = enum_history; | |
4885 | while (current_history != NULL) | |
4886 | { | |
4887 | current_history->sym->ts.kind = kind; | |
4888 | current_history = current_history->next; | |
4889 | } | |
4890 | } | |
4891 | ||
636dff67 | 4892 | |
6de9cd9a DN |
4893 | /* Match any of the various end-block statements. Returns the type of |
4894 | END to the caller. The END INTERFACE, END IF, END DO and END | |
4895 | SELECT statements cannot be replaced by a single END statement. */ | |
4896 | ||
4897 | match | |
636dff67 | 4898 | gfc_match_end (gfc_statement *st) |
6de9cd9a DN |
4899 | { |
4900 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4901 | gfc_compile_state state; | |
4902 | locus old_loc; | |
4903 | const char *block_name; | |
4904 | const char *target; | |
ddc9ce91 | 4905 | int eos_ok; |
6de9cd9a DN |
4906 | match m; |
4907 | ||
63645982 | 4908 | old_loc = gfc_current_locus; |
6de9cd9a DN |
4909 | if (gfc_match ("end") != MATCH_YES) |
4910 | return MATCH_NO; | |
4911 | ||
4912 | state = gfc_current_state (); | |
636dff67 SK |
4913 | block_name = gfc_current_block () == NULL |
4914 | ? NULL : gfc_current_block ()->name; | |
6de9cd9a DN |
4915 | |
4916 | if (state == COMP_CONTAINS) | |
4917 | { | |
4918 | state = gfc_state_stack->previous->state; | |
636dff67 SK |
4919 | block_name = gfc_state_stack->previous->sym == NULL |
4920 | ? NULL : gfc_state_stack->previous->sym->name; | |
6de9cd9a DN |
4921 | } |
4922 | ||
4923 | switch (state) | |
4924 | { | |
4925 | case COMP_NONE: | |
4926 | case COMP_PROGRAM: | |
4927 | *st = ST_END_PROGRAM; | |
4928 | target = " program"; | |
ddc9ce91 | 4929 | eos_ok = 1; |
6de9cd9a DN |
4930 | break; |
4931 | ||
4932 | case COMP_SUBROUTINE: | |
4933 | *st = ST_END_SUBROUTINE; | |
4934 | target = " subroutine"; | |
ddc9ce91 | 4935 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
4936 | break; |
4937 | ||
4938 | case COMP_FUNCTION: | |
4939 | *st = ST_END_FUNCTION; | |
4940 | target = " function"; | |
ddc9ce91 | 4941 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
4942 | break; |
4943 | ||
4944 | case COMP_BLOCK_DATA: | |
4945 | *st = ST_END_BLOCK_DATA; | |
4946 | target = " block data"; | |
ddc9ce91 | 4947 | eos_ok = 1; |
6de9cd9a DN |
4948 | break; |
4949 | ||
4950 | case COMP_MODULE: | |
4951 | *st = ST_END_MODULE; | |
4952 | target = " module"; | |
ddc9ce91 | 4953 | eos_ok = 1; |
6de9cd9a DN |
4954 | break; |
4955 | ||
4956 | case COMP_INTERFACE: | |
4957 | *st = ST_END_INTERFACE; | |
4958 | target = " interface"; | |
ddc9ce91 | 4959 | eos_ok = 0; |
6de9cd9a DN |
4960 | break; |
4961 | ||
4962 | case COMP_DERIVED: | |
4963 | *st = ST_END_TYPE; | |
4964 | target = " type"; | |
ddc9ce91 | 4965 | eos_ok = 0; |
6de9cd9a DN |
4966 | break; |
4967 | ||
4968 | case COMP_IF: | |
4969 | *st = ST_ENDIF; | |
4970 | target = " if"; | |
ddc9ce91 | 4971 | eos_ok = 0; |
6de9cd9a DN |
4972 | break; |
4973 | ||
4974 | case COMP_DO: | |
4975 | *st = ST_ENDDO; | |
4976 | target = " do"; | |
ddc9ce91 | 4977 | eos_ok = 0; |
6de9cd9a DN |
4978 | break; |
4979 | ||
4980 | case COMP_SELECT: | |
4981 | *st = ST_END_SELECT; | |
4982 | target = " select"; | |
ddc9ce91 | 4983 | eos_ok = 0; |
6de9cd9a DN |
4984 | break; |
4985 | ||
4986 | case COMP_FORALL: | |
4987 | *st = ST_END_FORALL; | |
4988 | target = " forall"; | |
ddc9ce91 | 4989 | eos_ok = 0; |
6de9cd9a DN |
4990 | break; |
4991 | ||
4992 | case COMP_WHERE: | |
4993 | *st = ST_END_WHERE; | |
4994 | target = " where"; | |
ddc9ce91 | 4995 | eos_ok = 0; |
6de9cd9a DN |
4996 | break; |
4997 | ||
25d8f0a2 TS |
4998 | case COMP_ENUM: |
4999 | *st = ST_END_ENUM; | |
5000 | target = " enum"; | |
5001 | eos_ok = 0; | |
5002 | last_initializer = NULL; | |
5003 | set_enum_kind (); | |
5004 | gfc_free_enum_history (); | |
5005 | break; | |
5006 | ||
6de9cd9a DN |
5007 | default: |
5008 | gfc_error ("Unexpected END statement at %C"); | |
5009 | goto cleanup; | |
5010 | } | |
5011 | ||
5012 | if (gfc_match_eos () == MATCH_YES) | |
5013 | { | |
ddc9ce91 | 5014 | if (!eos_ok) |
6de9cd9a | 5015 | { |
66e4ab31 | 5016 | /* We would have required END [something]. */ |
59ce85b5 TS |
5017 | gfc_error ("%s statement expected at %L", |
5018 | gfc_ascii_statement (*st), &old_loc); | |
6de9cd9a DN |
5019 | goto cleanup; |
5020 | } | |
5021 | ||
5022 | return MATCH_YES; | |
5023 | } | |
5024 | ||
5025 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
5026 | if (gfc_match (target) != MATCH_YES) | |
5027 | { | |
5028 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
5029 | goto cleanup; | |
5030 | } | |
5031 | ||
5032 | /* If we're at the end, make sure a block name wasn't required. */ | |
5033 | if (gfc_match_eos () == MATCH_YES) | |
5034 | { | |
5035 | ||
690af379 TS |
5036 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT |
5037 | && *st != ST_END_FORALL && *st != ST_END_WHERE) | |
6de9cd9a DN |
5038 | return MATCH_YES; |
5039 | ||
5040 | if (gfc_current_block () == NULL) | |
5041 | return MATCH_YES; | |
5042 | ||
5043 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
5044 | block_name, gfc_ascii_statement (*st)); | |
5045 | ||
5046 | return MATCH_ERROR; | |
5047 | } | |
5048 | ||
5049 | /* END INTERFACE has a special handler for its several possible endings. */ | |
5050 | if (*st == ST_END_INTERFACE) | |
5051 | return gfc_match_end_interface (); | |
5052 | ||
66e4ab31 SK |
5053 | /* We haven't hit the end of statement, so what is left must be an |
5054 | end-name. */ | |
6de9cd9a DN |
5055 | m = gfc_match_space (); |
5056 | if (m == MATCH_YES) | |
5057 | m = gfc_match_name (name); | |
5058 | ||
5059 | if (m == MATCH_NO) | |
5060 | gfc_error ("Expected terminating name at %C"); | |
5061 | if (m != MATCH_YES) | |
5062 | goto cleanup; | |
5063 | ||
5064 | if (block_name == NULL) | |
5065 | goto syntax; | |
5066 | ||
5067 | if (strcmp (name, block_name) != 0) | |
5068 | { | |
5069 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
5070 | gfc_ascii_statement (*st)); | |
5071 | goto cleanup; | |
5072 | } | |
5073 | ||
5074 | if (gfc_match_eos () == MATCH_YES) | |
5075 | return MATCH_YES; | |
5076 | ||
5077 | syntax: | |
5078 | gfc_syntax_error (*st); | |
5079 | ||
5080 | cleanup: | |
63645982 | 5081 | gfc_current_locus = old_loc; |
6de9cd9a DN |
5082 | return MATCH_ERROR; |
5083 | } | |
5084 | ||
5085 | ||
5086 | ||
5087 | /***************** Attribute declaration statements ****************/ | |
5088 | ||
5089 | /* Set the attribute of a single variable. */ | |
5090 | ||
5091 | static match | |
5092 | attr_decl1 (void) | |
5093 | { | |
5094 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5095 | gfc_array_spec *as; | |
5096 | gfc_symbol *sym; | |
5097 | locus var_locus; | |
5098 | match m; | |
5099 | ||
5100 | as = NULL; | |
5101 | ||
5102 | m = gfc_match_name (name); | |
5103 | if (m != MATCH_YES) | |
5104 | goto cleanup; | |
5105 | ||
5106 | if (find_special (name, &sym)) | |
5107 | return MATCH_ERROR; | |
5108 | ||
63645982 | 5109 | var_locus = gfc_current_locus; |
6de9cd9a DN |
5110 | |
5111 | /* Deal with possible array specification for certain attributes. */ | |
5112 | if (current_attr.dimension | |
5113 | || current_attr.allocatable | |
5114 | || current_attr.pointer | |
5115 | || current_attr.target) | |
5116 | { | |
5117 | m = gfc_match_array_spec (&as); | |
5118 | if (m == MATCH_ERROR) | |
5119 | goto cleanup; | |
5120 | ||
5121 | if (current_attr.dimension && m == MATCH_NO) | |
5122 | { | |
636dff67 SK |
5123 | gfc_error ("Missing array specification at %L in DIMENSION " |
5124 | "statement", &var_locus); | |
6de9cd9a DN |
5125 | m = MATCH_ERROR; |
5126 | goto cleanup; | |
5127 | } | |
5128 | ||
5129 | if ((current_attr.allocatable || current_attr.pointer) | |
5130 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
5131 | { | |
636dff67 | 5132 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
6de9cd9a DN |
5133 | m = MATCH_ERROR; |
5134 | goto cleanup; | |
5135 | } | |
5136 | } | |
5137 | ||
636dff67 SK |
5138 | /* Update symbol table. DIMENSION attribute is set |
5139 | in gfc_set_array_spec(). */ | |
6de9cd9a DN |
5140 | if (current_attr.dimension == 0 |
5141 | && gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
5142 | { | |
5143 | m = MATCH_ERROR; | |
5144 | goto cleanup; | |
5145 | } | |
5146 | ||
5147 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
5148 | { | |
5149 | m = MATCH_ERROR; | |
5150 | goto cleanup; | |
5151 | } | |
d51347f9 | 5152 | |
83d890b9 AL |
5153 | if (sym->attr.cray_pointee && sym->as != NULL) |
5154 | { | |
5155 | /* Fix the array spec. */ | |
5156 | m = gfc_mod_pointee_as (sym->as); | |
5157 | if (m == MATCH_ERROR) | |
5158 | goto cleanup; | |
5159 | } | |
6de9cd9a | 5160 | |
7114edca | 5161 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
1902704e PT |
5162 | { |
5163 | m = MATCH_ERROR; | |
5164 | goto cleanup; | |
5165 | } | |
5166 | ||
6de9cd9a DN |
5167 | if ((current_attr.external || current_attr.intrinsic) |
5168 | && sym->attr.flavor != FL_PROCEDURE | |
231b2fcc | 5169 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
5170 | { |
5171 | m = MATCH_ERROR; | |
5172 | goto cleanup; | |
5173 | } | |
5174 | ||
5175 | return MATCH_YES; | |
5176 | ||
5177 | cleanup: | |
5178 | gfc_free_array_spec (as); | |
5179 | return m; | |
5180 | } | |
5181 | ||
5182 | ||
5183 | /* Generic attribute declaration subroutine. Used for attributes that | |
5184 | just have a list of names. */ | |
5185 | ||
5186 | static match | |
5187 | attr_decl (void) | |
5188 | { | |
5189 | match m; | |
5190 | ||
5191 | /* Gobble the optional double colon, by simply ignoring the result | |
5192 | of gfc_match(). */ | |
5193 | gfc_match (" ::"); | |
5194 | ||
5195 | for (;;) | |
5196 | { | |
5197 | m = attr_decl1 (); | |
5198 | if (m != MATCH_YES) | |
5199 | break; | |
5200 | ||
5201 | if (gfc_match_eos () == MATCH_YES) | |
5202 | { | |
5203 | m = MATCH_YES; | |
5204 | break; | |
5205 | } | |
5206 | ||
5207 | if (gfc_match_char (',') != MATCH_YES) | |
5208 | { | |
5209 | gfc_error ("Unexpected character in variable list at %C"); | |
5210 | m = MATCH_ERROR; | |
5211 | break; | |
5212 | } | |
5213 | } | |
5214 | ||
5215 | return m; | |
5216 | } | |
5217 | ||
5218 | ||
83d890b9 AL |
5219 | /* This routine matches Cray Pointer declarations of the form: |
5220 | pointer ( <pointer>, <pointee> ) | |
5221 | or | |
d51347f9 TB |
5222 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
5223 | The pointer, if already declared, should be an integer. Otherwise, we | |
83d890b9 AL |
5224 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
5225 | be either a scalar, or an array declaration. No space is allocated for | |
d51347f9 | 5226 | the pointee. For the statement |
83d890b9 AL |
5227 | pointer (ipt, ar(10)) |
5228 | any subsequent uses of ar will be translated (in C-notation) as | |
d51347f9 | 5229 | ar(i) => ((<type> *) ipt)(i) |
b122dc6a | 5230 | After gimplification, pointee variable will disappear in the code. */ |
83d890b9 AL |
5231 | |
5232 | static match | |
5233 | cray_pointer_decl (void) | |
5234 | { | |
5235 | match m; | |
5236 | gfc_array_spec *as; | |
5237 | gfc_symbol *cptr; /* Pointer symbol. */ | |
5238 | gfc_symbol *cpte; /* Pointee symbol. */ | |
5239 | locus var_locus; | |
5240 | bool done = false; | |
5241 | ||
5242 | while (!done) | |
5243 | { | |
5244 | if (gfc_match_char ('(') != MATCH_YES) | |
5245 | { | |
5246 | gfc_error ("Expected '(' at %C"); | |
d51347f9 | 5247 | return MATCH_ERROR; |
83d890b9 | 5248 | } |
d51347f9 | 5249 | |
83d890b9 AL |
5250 | /* Match pointer. */ |
5251 | var_locus = gfc_current_locus; | |
5252 | gfc_clear_attr (¤t_attr); | |
5253 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
5254 | current_ts.type = BT_INTEGER; | |
5255 | current_ts.kind = gfc_index_integer_kind; | |
5256 | ||
d51347f9 | 5257 | m = gfc_match_symbol (&cptr, 0); |
83d890b9 AL |
5258 | if (m != MATCH_YES) |
5259 | { | |
5260 | gfc_error ("Expected variable name at %C"); | |
5261 | return m; | |
5262 | } | |
d51347f9 | 5263 | |
83d890b9 AL |
5264 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) |
5265 | return MATCH_ERROR; | |
5266 | ||
d51347f9 | 5267 | gfc_set_sym_referenced (cptr); |
83d890b9 AL |
5268 | |
5269 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
5270 | { | |
5271 | cptr->ts.type = BT_INTEGER; | |
d51347f9 | 5272 | cptr->ts.kind = gfc_index_integer_kind; |
83d890b9 AL |
5273 | } |
5274 | else if (cptr->ts.type != BT_INTEGER) | |
5275 | { | |
e25a0da3 | 5276 | gfc_error ("Cray pointer at %C must be an integer"); |
83d890b9 AL |
5277 | return MATCH_ERROR; |
5278 | } | |
5279 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
5280 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
e25a0da3 | 5281 | " memory addresses require %d bytes", |
636dff67 | 5282 | cptr->ts.kind, gfc_index_integer_kind); |
83d890b9 AL |
5283 | |
5284 | if (gfc_match_char (',') != MATCH_YES) | |
5285 | { | |
5286 | gfc_error ("Expected \",\" at %C"); | |
d51347f9 | 5287 | return MATCH_ERROR; |
83d890b9 AL |
5288 | } |
5289 | ||
d51347f9 | 5290 | /* Match Pointee. */ |
83d890b9 AL |
5291 | var_locus = gfc_current_locus; |
5292 | gfc_clear_attr (¤t_attr); | |
5293 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
5294 | current_ts.type = BT_UNKNOWN; | |
5295 | current_ts.kind = 0; | |
5296 | ||
5297 | m = gfc_match_symbol (&cpte, 0); | |
5298 | if (m != MATCH_YES) | |
5299 | { | |
5300 | gfc_error ("Expected variable name at %C"); | |
5301 | return m; | |
5302 | } | |
d51347f9 | 5303 | |
83d890b9 AL |
5304 | /* Check for an optional array spec. */ |
5305 | m = gfc_match_array_spec (&as); | |
5306 | if (m == MATCH_ERROR) | |
5307 | { | |
5308 | gfc_free_array_spec (as); | |
5309 | return m; | |
5310 | } | |
5311 | else if (m == MATCH_NO) | |
5312 | { | |
5313 | gfc_free_array_spec (as); | |
5314 | as = NULL; | |
5315 | } | |
5316 | ||
5317 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
5318 | return MATCH_ERROR; | |
5319 | ||
5320 | gfc_set_sym_referenced (cpte); | |
5321 | ||
5322 | if (cpte->as == NULL) | |
5323 | { | |
5324 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
5325 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
5326 | } | |
5327 | else if (as != NULL) | |
5328 | { | |
e25a0da3 | 5329 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
83d890b9 AL |
5330 | gfc_free_array_spec (as); |
5331 | return MATCH_ERROR; | |
5332 | } | |
5333 | ||
5334 | as = NULL; | |
5335 | ||
5336 | if (cpte->as != NULL) | |
5337 | { | |
5338 | /* Fix array spec. */ | |
5339 | m = gfc_mod_pointee_as (cpte->as); | |
5340 | if (m == MATCH_ERROR) | |
5341 | return m; | |
5342 | } | |
5343 | ||
5344 | /* Point the Pointee at the Pointer. */ | |
b122dc6a | 5345 | cpte->cp_pointer = cptr; |
83d890b9 AL |
5346 | |
5347 | if (gfc_match_char (')') != MATCH_YES) | |
5348 | { | |
5349 | gfc_error ("Expected \")\" at %C"); | |
5350 | return MATCH_ERROR; | |
5351 | } | |
5352 | m = gfc_match_char (','); | |
5353 | if (m != MATCH_YES) | |
5354 | done = true; /* Stop searching for more declarations. */ | |
5355 | ||
5356 | } | |
5357 | ||
5358 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
5359 | || gfc_match_eos () != MATCH_YES) | |
5360 | { | |
5361 | gfc_error ("Expected \",\" or end of statement at %C"); | |
5362 | return MATCH_ERROR; | |
5363 | } | |
5364 | return MATCH_YES; | |
5365 | } | |
5366 | ||
5367 | ||
6de9cd9a DN |
5368 | match |
5369 | gfc_match_external (void) | |
5370 | { | |
5371 | ||
5372 | gfc_clear_attr (¤t_attr); | |
1902704e | 5373 | current_attr.external = 1; |
6de9cd9a DN |
5374 | |
5375 | return attr_decl (); | |
5376 | } | |
5377 | ||
5378 | ||
6de9cd9a DN |
5379 | match |
5380 | gfc_match_intent (void) | |
5381 | { | |
5382 | sym_intent intent; | |
5383 | ||
5384 | intent = match_intent_spec (); | |
5385 | if (intent == INTENT_UNKNOWN) | |
5386 | return MATCH_ERROR; | |
5387 | ||
5388 | gfc_clear_attr (¤t_attr); | |
1902704e | 5389 | current_attr.intent = intent; |
6de9cd9a DN |
5390 | |
5391 | return attr_decl (); | |
5392 | } | |
5393 | ||
5394 | ||
5395 | match | |
5396 | gfc_match_intrinsic (void) | |
5397 | { | |
5398 | ||
5399 | gfc_clear_attr (¤t_attr); | |
1902704e | 5400 | current_attr.intrinsic = 1; |
6de9cd9a DN |
5401 | |
5402 | return attr_decl (); | |
5403 | } | |
5404 | ||
5405 | ||
5406 | match | |
5407 | gfc_match_optional (void) | |
5408 | { | |
5409 | ||
5410 | gfc_clear_attr (¤t_attr); | |
1902704e | 5411 | current_attr.optional = 1; |
6de9cd9a DN |
5412 | |
5413 | return attr_decl (); | |
5414 | } | |
5415 | ||
5416 | ||
5417 | match | |
5418 | gfc_match_pointer (void) | |
5419 | { | |
83d890b9 AL |
5420 | gfc_gobble_whitespace (); |
5421 | if (gfc_peek_char () == '(') | |
5422 | { | |
5423 | if (!gfc_option.flag_cray_pointer) | |
5424 | { | |
636dff67 SK |
5425 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
5426 | "flag"); | |
83d890b9 AL |
5427 | return MATCH_ERROR; |
5428 | } | |
5429 | return cray_pointer_decl (); | |
5430 | } | |
5431 | else | |
5432 | { | |
5433 | gfc_clear_attr (¤t_attr); | |
1902704e | 5434 | current_attr.pointer = 1; |
83d890b9 AL |
5435 | |
5436 | return attr_decl (); | |
5437 | } | |
6de9cd9a DN |
5438 | } |
5439 | ||
5440 | ||
5441 | match | |
5442 | gfc_match_allocatable (void) | |
5443 | { | |
6de9cd9a | 5444 | gfc_clear_attr (¤t_attr); |
1902704e | 5445 | current_attr.allocatable = 1; |
6de9cd9a DN |
5446 | |
5447 | return attr_decl (); | |
5448 | } | |
5449 | ||
5450 | ||
5451 | match | |
5452 | gfc_match_dimension (void) | |
5453 | { | |
6de9cd9a | 5454 | gfc_clear_attr (¤t_attr); |
1902704e | 5455 | current_attr.dimension = 1; |
6de9cd9a DN |
5456 | |
5457 | return attr_decl (); | |
5458 | } | |
5459 | ||
5460 | ||
5461 | match | |
5462 | gfc_match_target (void) | |
5463 | { | |
6de9cd9a | 5464 | gfc_clear_attr (¤t_attr); |
1902704e | 5465 | current_attr.target = 1; |
6de9cd9a DN |
5466 | |
5467 | return attr_decl (); | |
5468 | } | |
5469 | ||
5470 | ||
5471 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
5472 | statement. */ | |
5473 | ||
5474 | static match | |
5475 | access_attr_decl (gfc_statement st) | |
5476 | { | |
5477 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5478 | interface_type type; | |
5479 | gfc_user_op *uop; | |
5480 | gfc_symbol *sym; | |
5481 | gfc_intrinsic_op operator; | |
5482 | match m; | |
5483 | ||
5484 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5485 | goto done; | |
5486 | ||
5487 | for (;;) | |
5488 | { | |
5489 | m = gfc_match_generic_spec (&type, name, &operator); | |
5490 | if (m == MATCH_NO) | |
5491 | goto syntax; | |
5492 | if (m == MATCH_ERROR) | |
5493 | return MATCH_ERROR; | |
5494 | ||
5495 | switch (type) | |
5496 | { | |
5497 | case INTERFACE_NAMELESS: | |
9e1d712c | 5498 | case INTERFACE_ABSTRACT: |
6de9cd9a DN |
5499 | goto syntax; |
5500 | ||
5501 | case INTERFACE_GENERIC: | |
5502 | if (gfc_get_symbol (name, NULL, &sym)) | |
5503 | goto done; | |
5504 | ||
636dff67 SK |
5505 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
5506 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
231b2fcc | 5507 | sym->name, NULL) == FAILURE) |
6de9cd9a DN |
5508 | return MATCH_ERROR; |
5509 | ||
5510 | break; | |
5511 | ||
5512 | case INTERFACE_INTRINSIC_OP: | |
5513 | if (gfc_current_ns->operator_access[operator] == ACCESS_UNKNOWN) | |
5514 | { | |
5515 | gfc_current_ns->operator_access[operator] = | |
5516 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
5517 | } | |
5518 | else | |
5519 | { | |
5520 | gfc_error ("Access specification of the %s operator at %C has " | |
5521 | "already been specified", gfc_op2string (operator)); | |
5522 | goto done; | |
5523 | } | |
5524 | ||
5525 | break; | |
5526 | ||
5527 | case INTERFACE_USER_OP: | |
5528 | uop = gfc_get_uop (name); | |
5529 | ||
5530 | if (uop->access == ACCESS_UNKNOWN) | |
5531 | { | |
636dff67 SK |
5532 | uop->access = (st == ST_PUBLIC) |
5533 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
6de9cd9a DN |
5534 | } |
5535 | else | |
5536 | { | |
636dff67 SK |
5537 | gfc_error ("Access specification of the .%s. operator at %C " |
5538 | "has already been specified", sym->name); | |
6de9cd9a DN |
5539 | goto done; |
5540 | } | |
5541 | ||
5542 | break; | |
5543 | } | |
5544 | ||
5545 | if (gfc_match_char (',') == MATCH_NO) | |
5546 | break; | |
5547 | } | |
5548 | ||
5549 | if (gfc_match_eos () != MATCH_YES) | |
5550 | goto syntax; | |
5551 | return MATCH_YES; | |
5552 | ||
5553 | syntax: | |
5554 | gfc_syntax_error (st); | |
5555 | ||
5556 | done: | |
5557 | return MATCH_ERROR; | |
5558 | } | |
5559 | ||
5560 | ||
ee7e677f TB |
5561 | match |
5562 | gfc_match_protected (void) | |
5563 | { | |
5564 | gfc_symbol *sym; | |
5565 | match m; | |
5566 | ||
5567 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
5568 | { | |
5569 | gfc_error ("PROTECTED at %C only allowed in specification " | |
5570 | "part of a module"); | |
5571 | return MATCH_ERROR; | |
5572 | ||
5573 | } | |
5574 | ||
636dff67 | 5575 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
ee7e677f TB |
5576 | == FAILURE) |
5577 | return MATCH_ERROR; | |
5578 | ||
5579 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5580 | { | |
5581 | return MATCH_ERROR; | |
5582 | } | |
5583 | ||
5584 | if (gfc_match_eos () == MATCH_YES) | |
5585 | goto syntax; | |
5586 | ||
5587 | for(;;) | |
5588 | { | |
5589 | m = gfc_match_symbol (&sym, 0); | |
5590 | switch (m) | |
5591 | { | |
5592 | case MATCH_YES: | |
636dff67 SK |
5593 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
5594 | == FAILURE) | |
ee7e677f TB |
5595 | return MATCH_ERROR; |
5596 | goto next_item; | |
5597 | ||
5598 | case MATCH_NO: | |
5599 | break; | |
5600 | ||
5601 | case MATCH_ERROR: | |
5602 | return MATCH_ERROR; | |
5603 | } | |
5604 | ||
5605 | next_item: | |
5606 | if (gfc_match_eos () == MATCH_YES) | |
5607 | break; | |
5608 | if (gfc_match_char (',') != MATCH_YES) | |
5609 | goto syntax; | |
5610 | } | |
5611 | ||
5612 | return MATCH_YES; | |
5613 | ||
5614 | syntax: | |
5615 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
5616 | return MATCH_ERROR; | |
5617 | } | |
5618 | ||
5619 | ||
86bf520d | 5620 | /* The PRIVATE statement is a bit weird in that it can be an attribute |
6de9cd9a DN |
5621 | declaration, but also works as a standlone statement inside of a |
5622 | type declaration or a module. */ | |
5623 | ||
5624 | match | |
636dff67 | 5625 | gfc_match_private (gfc_statement *st) |
6de9cd9a DN |
5626 | { |
5627 | ||
5628 | if (gfc_match ("private") != MATCH_YES) | |
5629 | return MATCH_NO; | |
5630 | ||
d51347f9 TB |
5631 | if (gfc_current_state () != COMP_MODULE |
5632 | && (gfc_current_state () != COMP_DERIVED | |
5633 | || !gfc_state_stack->previous | |
5634 | || gfc_state_stack->previous->state != COMP_MODULE)) | |
5635 | { | |
5636 | gfc_error ("PRIVATE statement at %C is only allowed in the " | |
5637 | "specification part of a module"); | |
5638 | return MATCH_ERROR; | |
5639 | } | |
5640 | ||
6de9cd9a DN |
5641 | if (gfc_current_state () == COMP_DERIVED) |
5642 | { | |
5643 | if (gfc_match_eos () == MATCH_YES) | |
5644 | { | |
5645 | *st = ST_PRIVATE; | |
5646 | return MATCH_YES; | |
5647 | } | |
5648 | ||
5649 | gfc_syntax_error (ST_PRIVATE); | |
5650 | return MATCH_ERROR; | |
5651 | } | |
5652 | ||
5653 | if (gfc_match_eos () == MATCH_YES) | |
5654 | { | |
5655 | *st = ST_PRIVATE; | |
5656 | return MATCH_YES; | |
5657 | } | |
5658 | ||
5659 | *st = ST_ATTR_DECL; | |
5660 | return access_attr_decl (ST_PRIVATE); | |
5661 | } | |
5662 | ||
5663 | ||
5664 | match | |
636dff67 | 5665 | gfc_match_public (gfc_statement *st) |
6de9cd9a DN |
5666 | { |
5667 | ||
5668 | if (gfc_match ("public") != MATCH_YES) | |
5669 | return MATCH_NO; | |
5670 | ||
d51347f9 TB |
5671 | if (gfc_current_state () != COMP_MODULE) |
5672 | { | |
5673 | gfc_error ("PUBLIC statement at %C is only allowed in the " | |
5674 | "specification part of a module"); | |
5675 | return MATCH_ERROR; | |
5676 | } | |
5677 | ||
6de9cd9a DN |
5678 | if (gfc_match_eos () == MATCH_YES) |
5679 | { | |
5680 | *st = ST_PUBLIC; | |
5681 | return MATCH_YES; | |
5682 | } | |
5683 | ||
5684 | *st = ST_ATTR_DECL; | |
5685 | return access_attr_decl (ST_PUBLIC); | |
5686 | } | |
5687 | ||
5688 | ||
5689 | /* Workhorse for gfc_match_parameter. */ | |
5690 | ||
5691 | static match | |
5692 | do_parm (void) | |
5693 | { | |
5694 | gfc_symbol *sym; | |
5695 | gfc_expr *init; | |
5696 | match m; | |
5697 | ||
5698 | m = gfc_match_symbol (&sym, 0); | |
5699 | if (m == MATCH_NO) | |
5700 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
5701 | ||
5702 | if (m != MATCH_YES) | |
5703 | return m; | |
5704 | ||
5705 | if (gfc_match_char ('=') == MATCH_NO) | |
5706 | { | |
5707 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
5708 | return MATCH_ERROR; | |
5709 | } | |
5710 | ||
5711 | m = gfc_match_init_expr (&init); | |
5712 | if (m == MATCH_NO) | |
5713 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
5714 | if (m != MATCH_YES) | |
5715 | return m; | |
5716 | ||
5717 | if (sym->ts.type == BT_UNKNOWN | |
5718 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
5719 | { | |
5720 | m = MATCH_ERROR; | |
5721 | goto cleanup; | |
5722 | } | |
5723 | ||
5724 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
231b2fcc | 5725 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
5726 | { |
5727 | m = MATCH_ERROR; | |
5728 | goto cleanup; | |
5729 | } | |
5730 | ||
7e2eba4b DE |
5731 | if (sym->ts.type == BT_CHARACTER |
5732 | && sym->ts.cl != NULL | |
5733 | && sym->ts.cl->length != NULL | |
5734 | && sym->ts.cl->length->expr_type == EXPR_CONSTANT | |
5735 | && init->expr_type == EXPR_CONSTANT | |
5736 | && init->ts.type == BT_CHARACTER | |
5737 | && init->ts.kind == 1) | |
5738 | gfc_set_constant_character_len ( | |
2220652d | 5739 | mpz_get_si (sym->ts.cl->length->value.integer), init, false); |
7e2eba4b | 5740 | |
6de9cd9a DN |
5741 | sym->value = init; |
5742 | return MATCH_YES; | |
5743 | ||
5744 | cleanup: | |
5745 | gfc_free_expr (init); | |
5746 | return m; | |
5747 | } | |
5748 | ||
5749 | ||
5750 | /* Match a parameter statement, with the weird syntax that these have. */ | |
5751 | ||
5752 | match | |
5753 | gfc_match_parameter (void) | |
5754 | { | |
5755 | match m; | |
5756 | ||
5757 | if (gfc_match_char ('(') == MATCH_NO) | |
5758 | return MATCH_NO; | |
5759 | ||
5760 | for (;;) | |
5761 | { | |
5762 | m = do_parm (); | |
5763 | if (m != MATCH_YES) | |
5764 | break; | |
5765 | ||
5766 | if (gfc_match (" )%t") == MATCH_YES) | |
5767 | break; | |
5768 | ||
5769 | if (gfc_match_char (',') != MATCH_YES) | |
5770 | { | |
5771 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
5772 | m = MATCH_ERROR; | |
5773 | break; | |
5774 | } | |
5775 | } | |
5776 | ||
5777 | return m; | |
5778 | } | |
5779 | ||
5780 | ||
5781 | /* Save statements have a special syntax. */ | |
5782 | ||
5783 | match | |
5784 | gfc_match_save (void) | |
5785 | { | |
9056bd70 TS |
5786 | char n[GFC_MAX_SYMBOL_LEN+1]; |
5787 | gfc_common_head *c; | |
6de9cd9a DN |
5788 | gfc_symbol *sym; |
5789 | match m; | |
5790 | ||
5791 | if (gfc_match_eos () == MATCH_YES) | |
5792 | { | |
5793 | if (gfc_current_ns->seen_save) | |
5794 | { | |
636dff67 SK |
5795 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
5796 | "follows previous SAVE statement") | |
09e87839 AL |
5797 | == FAILURE) |
5798 | return MATCH_ERROR; | |
6de9cd9a DN |
5799 | } |
5800 | ||
5801 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
5802 | return MATCH_YES; | |
5803 | } | |
5804 | ||
5805 | if (gfc_current_ns->save_all) | |
5806 | { | |
636dff67 SK |
5807 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
5808 | "blanket SAVE statement") | |
09e87839 AL |
5809 | == FAILURE) |
5810 | return MATCH_ERROR; | |
6de9cd9a DN |
5811 | } |
5812 | ||
5813 | gfc_match (" ::"); | |
5814 | ||
5815 | for (;;) | |
5816 | { | |
5817 | m = gfc_match_symbol (&sym, 0); | |
5818 | switch (m) | |
5819 | { | |
5820 | case MATCH_YES: | |
636dff67 SK |
5821 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
5822 | == FAILURE) | |
6de9cd9a DN |
5823 | return MATCH_ERROR; |
5824 | goto next_item; | |
5825 | ||
5826 | case MATCH_NO: | |
5827 | break; | |
5828 | ||
5829 | case MATCH_ERROR: | |
5830 | return MATCH_ERROR; | |
5831 | } | |
5832 | ||
9056bd70 | 5833 | m = gfc_match (" / %n /", &n); |
6de9cd9a DN |
5834 | if (m == MATCH_ERROR) |
5835 | return MATCH_ERROR; | |
5836 | if (m == MATCH_NO) | |
5837 | goto syntax; | |
5838 | ||
53814b8f | 5839 | c = gfc_get_common (n, 0); |
9056bd70 TS |
5840 | c->saved = 1; |
5841 | ||
6de9cd9a DN |
5842 | gfc_current_ns->seen_save = 1; |
5843 | ||
5844 | next_item: | |
5845 | if (gfc_match_eos () == MATCH_YES) | |
5846 | break; | |
5847 | if (gfc_match_char (',') != MATCH_YES) | |
5848 | goto syntax; | |
5849 | } | |
5850 | ||
5851 | return MATCH_YES; | |
5852 | ||
5853 | syntax: | |
5854 | gfc_error ("Syntax error in SAVE statement at %C"); | |
5855 | return MATCH_ERROR; | |
5856 | } | |
5857 | ||
5858 | ||
06469efd PT |
5859 | match |
5860 | gfc_match_value (void) | |
5861 | { | |
5862 | gfc_symbol *sym; | |
5863 | match m; | |
5864 | ||
636dff67 | 5865 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
06469efd PT |
5866 | == FAILURE) |
5867 | return MATCH_ERROR; | |
5868 | ||
5869 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5870 | { | |
5871 | return MATCH_ERROR; | |
5872 | } | |
5873 | ||
5874 | if (gfc_match_eos () == MATCH_YES) | |
5875 | goto syntax; | |
5876 | ||
5877 | for(;;) | |
5878 | { | |
5879 | m = gfc_match_symbol (&sym, 0); | |
5880 | switch (m) | |
5881 | { | |
5882 | case MATCH_YES: | |
636dff67 SK |
5883 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
5884 | == FAILURE) | |
06469efd PT |
5885 | return MATCH_ERROR; |
5886 | goto next_item; | |
5887 | ||
5888 | case MATCH_NO: | |
5889 | break; | |
5890 | ||
5891 | case MATCH_ERROR: | |
5892 | return MATCH_ERROR; | |
5893 | } | |
5894 | ||
5895 | next_item: | |
5896 | if (gfc_match_eos () == MATCH_YES) | |
5897 | break; | |
5898 | if (gfc_match_char (',') != MATCH_YES) | |
5899 | goto syntax; | |
5900 | } | |
5901 | ||
5902 | return MATCH_YES; | |
5903 | ||
5904 | syntax: | |
5905 | gfc_error ("Syntax error in VALUE statement at %C"); | |
5906 | return MATCH_ERROR; | |
5907 | } | |
5908 | ||
66e4ab31 | 5909 | |
775e6c3a TB |
5910 | match |
5911 | gfc_match_volatile (void) | |
5912 | { | |
5913 | gfc_symbol *sym; | |
5914 | match m; | |
5915 | ||
636dff67 | 5916 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
775e6c3a TB |
5917 | == FAILURE) |
5918 | return MATCH_ERROR; | |
5919 | ||
5920 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5921 | { | |
5922 | return MATCH_ERROR; | |
5923 | } | |
5924 | ||
5925 | if (gfc_match_eos () == MATCH_YES) | |
5926 | goto syntax; | |
5927 | ||
5928 | for(;;) | |
5929 | { | |
9bce3c1c TB |
5930 | /* VOLATILE is special because it can be added to host-associated |
5931 | symbols locally. */ | |
5932 | m = gfc_match_symbol (&sym, 1); | |
775e6c3a TB |
5933 | switch (m) |
5934 | { | |
5935 | case MATCH_YES: | |
636dff67 SK |
5936 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
5937 | == FAILURE) | |
775e6c3a TB |
5938 | return MATCH_ERROR; |
5939 | goto next_item; | |
5940 | ||
5941 | case MATCH_NO: | |
5942 | break; | |
5943 | ||
5944 | case MATCH_ERROR: | |
5945 | return MATCH_ERROR; | |
5946 | } | |
5947 | ||
5948 | next_item: | |
5949 | if (gfc_match_eos () == MATCH_YES) | |
5950 | break; | |
5951 | if (gfc_match_char (',') != MATCH_YES) | |
5952 | goto syntax; | |
5953 | } | |
5954 | ||
5955 | return MATCH_YES; | |
5956 | ||
5957 | syntax: | |
5958 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
5959 | return MATCH_ERROR; | |
5960 | } | |
5961 | ||
5962 | ||
6de9cd9a DN |
5963 | /* Match a module procedure statement. Note that we have to modify |
5964 | symbols in the parent's namespace because the current one was there | |
49de9e73 | 5965 | to receive symbols that are in an interface's formal argument list. */ |
6de9cd9a DN |
5966 | |
5967 | match | |
5968 | gfc_match_modproc (void) | |
5969 | { | |
5970 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5971 | gfc_symbol *sym; | |
5972 | match m; | |
060fca4a | 5973 | gfc_namespace *module_ns; |
2b77e908 | 5974 | gfc_interface *old_interface_head, *interface; |
6de9cd9a DN |
5975 | |
5976 | if (gfc_state_stack->state != COMP_INTERFACE | |
5977 | || gfc_state_stack->previous == NULL | |
129d15a3 JW |
5978 | || current_interface.type == INTERFACE_NAMELESS |
5979 | || current_interface.type == INTERFACE_ABSTRACT) | |
6de9cd9a | 5980 | { |
636dff67 SK |
5981 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
5982 | "interface"); | |
6de9cd9a DN |
5983 | return MATCH_ERROR; |
5984 | } | |
5985 | ||
060fca4a PT |
5986 | module_ns = gfc_current_ns->parent; |
5987 | for (; module_ns; module_ns = module_ns->parent) | |
5988 | if (module_ns->proc_name->attr.flavor == FL_MODULE) | |
5989 | break; | |
5990 | ||
5991 | if (module_ns == NULL) | |
5992 | return MATCH_ERROR; | |
5993 | ||
2b77e908 FXC |
5994 | /* Store the current state of the interface. We will need it if we |
5995 | end up with a syntax error and need to recover. */ | |
5996 | old_interface_head = gfc_current_interface_head (); | |
5997 | ||
6de9cd9a DN |
5998 | for (;;) |
5999 | { | |
2b77e908 FXC |
6000 | bool last = false; |
6001 | ||
6de9cd9a DN |
6002 | m = gfc_match_name (name); |
6003 | if (m == MATCH_NO) | |
6004 | goto syntax; | |
6005 | if (m != MATCH_YES) | |
6006 | return MATCH_ERROR; | |
6007 | ||
2b77e908 FXC |
6008 | /* Check for syntax error before starting to add symbols to the |
6009 | current namespace. */ | |
6010 | if (gfc_match_eos () == MATCH_YES) | |
6011 | last = true; | |
6012 | if (!last && gfc_match_char (',') != MATCH_YES) | |
6013 | goto syntax; | |
6014 | ||
6015 | /* Now we're sure the syntax is valid, we process this item | |
6016 | further. */ | |
060fca4a | 6017 | if (gfc_get_symbol (name, module_ns, &sym)) |
6de9cd9a DN |
6018 | return MATCH_ERROR; |
6019 | ||
6020 | if (sym->attr.proc != PROC_MODULE | |
231b2fcc TS |
6021 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
6022 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
6023 | return MATCH_ERROR; |
6024 | ||
6025 | if (gfc_add_interface (sym) == FAILURE) | |
6026 | return MATCH_ERROR; | |
6027 | ||
71f77fd7 PT |
6028 | sym->attr.mod_proc = 1; |
6029 | ||
2b77e908 | 6030 | if (last) |
6de9cd9a | 6031 | break; |
6de9cd9a DN |
6032 | } |
6033 | ||
6034 | return MATCH_YES; | |
6035 | ||
6036 | syntax: | |
2b77e908 FXC |
6037 | /* Restore the previous state of the interface. */ |
6038 | interface = gfc_current_interface_head (); | |
6039 | gfc_set_current_interface_head (old_interface_head); | |
6040 | ||
6041 | /* Free the new interfaces. */ | |
6042 | while (interface != old_interface_head) | |
6043 | { | |
6044 | gfc_interface *i = interface->next; | |
6045 | gfc_free (interface); | |
6046 | interface = i; | |
6047 | } | |
6048 | ||
6049 | /* And issue a syntax error. */ | |
6de9cd9a DN |
6050 | gfc_syntax_error (ST_MODULE_PROC); |
6051 | return MATCH_ERROR; | |
6052 | } | |
6053 | ||
6054 | ||
a8b3b0b6 CR |
6055 | /* Match the optional attribute specifiers for a type declaration. |
6056 | Return MATCH_ERROR if an error is encountered in one of the handled | |
6057 | attributes (public, private, bind(c)), MATCH_NO if what's found is | |
6058 | not a handled attribute, and MATCH_YES otherwise. TODO: More error | |
6059 | checking on attribute conflicts needs to be done. */ | |
6de9cd9a DN |
6060 | |
6061 | match | |
a8b3b0b6 | 6062 | gfc_get_type_attr_spec (symbol_attribute *attr) |
6de9cd9a | 6063 | { |
a8b3b0b6 | 6064 | /* See if the derived type is marked as private. */ |
6de9cd9a DN |
6065 | if (gfc_match (" , private") == MATCH_YES) |
6066 | { | |
d51347f9 | 6067 | if (gfc_current_state () != COMP_MODULE) |
6de9cd9a | 6068 | { |
d51347f9 TB |
6069 | gfc_error ("Derived type at %C can only be PRIVATE in the " |
6070 | "specification part of a module"); | |
6de9cd9a DN |
6071 | return MATCH_ERROR; |
6072 | } | |
6073 | ||
a8b3b0b6 | 6074 | if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
6de9cd9a | 6075 | return MATCH_ERROR; |
6de9cd9a | 6076 | } |
a8b3b0b6 | 6077 | else if (gfc_match (" , public") == MATCH_YES) |
6de9cd9a | 6078 | { |
d51347f9 | 6079 | if (gfc_current_state () != COMP_MODULE) |
6de9cd9a | 6080 | { |
d51347f9 TB |
6081 | gfc_error ("Derived type at %C can only be PUBLIC in the " |
6082 | "specification part of a module"); | |
6de9cd9a DN |
6083 | return MATCH_ERROR; |
6084 | } | |
6085 | ||
a8b3b0b6 | 6086 | if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
6de9cd9a | 6087 | return MATCH_ERROR; |
6de9cd9a | 6088 | } |
e7303e85 | 6089 | else if (gfc_match(" , bind ( c )") == MATCH_YES) |
a8b3b0b6 CR |
6090 | { |
6091 | /* If the type is defined to be bind(c) it then needs to make | |
6092 | sure that all fields are interoperable. This will | |
6093 | need to be a semantic check on the finished derived type. | |
6094 | See 15.2.3 (lines 9-12) of F2003 draft. */ | |
6095 | if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) | |
6096 | return MATCH_ERROR; | |
6097 | ||
6098 | /* TODO: attr conflicts need to be checked, probably in symbol.c. */ | |
6099 | } | |
6100 | else | |
6101 | return MATCH_NO; | |
6102 | ||
6103 | /* If we get here, something matched. */ | |
6104 | return MATCH_YES; | |
6105 | } | |
6106 | ||
6107 | ||
6108 | /* Match the beginning of a derived type declaration. If a type name | |
6109 | was the result of a function, then it is possible to have a symbol | |
6110 | already to be known as a derived type yet have no components. */ | |
6111 | ||
6112 | match | |
6113 | gfc_match_derived_decl (void) | |
6114 | { | |
6115 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6116 | symbol_attribute attr; | |
6117 | gfc_symbol *sym; | |
6118 | match m; | |
6119 | match is_type_attr_spec = MATCH_NO; | |
e7303e85 | 6120 | bool seen_attr = false; |
a8b3b0b6 CR |
6121 | |
6122 | if (gfc_current_state () == COMP_DERIVED) | |
6123 | return MATCH_NO; | |
6124 | ||
6125 | gfc_clear_attr (&attr); | |
6126 | ||
6127 | do | |
6128 | { | |
6129 | is_type_attr_spec = gfc_get_type_attr_spec (&attr); | |
6130 | if (is_type_attr_spec == MATCH_ERROR) | |
6131 | return MATCH_ERROR; | |
e7303e85 FXC |
6132 | if (is_type_attr_spec == MATCH_YES) |
6133 | seen_attr = true; | |
a8b3b0b6 | 6134 | } while (is_type_attr_spec == MATCH_YES); |
6de9cd9a | 6135 | |
e7303e85 | 6136 | if (gfc_match (" ::") != MATCH_YES && seen_attr) |
6de9cd9a DN |
6137 | { |
6138 | gfc_error ("Expected :: in TYPE definition at %C"); | |
6139 | return MATCH_ERROR; | |
6140 | } | |
6141 | ||
6142 | m = gfc_match (" %n%t", name); | |
6143 | if (m != MATCH_YES) | |
6144 | return m; | |
6145 | ||
e9c06563 TB |
6146 | /* Make sure the name is not the name of an intrinsic type. */ |
6147 | if (gfc_is_intrinsic_typename (name)) | |
6de9cd9a | 6148 | { |
636dff67 SK |
6149 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
6150 | "type", name); | |
6de9cd9a DN |
6151 | return MATCH_ERROR; |
6152 | } | |
6153 | ||
6154 | if (gfc_get_symbol (name, NULL, &sym)) | |
6155 | return MATCH_ERROR; | |
6156 | ||
6157 | if (sym->ts.type != BT_UNKNOWN) | |
6158 | { | |
6159 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
6160 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
6161 | return MATCH_ERROR; | |
6162 | } | |
6163 | ||
6164 | /* The symbol may already have the derived attribute without the | |
6165 | components. The ways this can happen is via a function | |
6166 | definition, an INTRINSIC statement or a subtype in another | |
6167 | derived type that is a pointer. The first part of the AND clause | |
f7b529fa | 6168 | is true if a the symbol is not the return value of a function. */ |
6de9cd9a | 6169 | if (sym->attr.flavor != FL_DERIVED |
231b2fcc | 6170 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
6171 | return MATCH_ERROR; |
6172 | ||
9fa6b0af | 6173 | if (sym->components != NULL || sym->attr.zero_comp) |
6de9cd9a | 6174 | { |
636dff67 SK |
6175 | gfc_error ("Derived type definition of '%s' at %C has already been " |
6176 | "defined", sym->name); | |
6de9cd9a DN |
6177 | return MATCH_ERROR; |
6178 | } | |
6179 | ||
6180 | if (attr.access != ACCESS_UNKNOWN | |
231b2fcc | 6181 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
6182 | return MATCH_ERROR; |
6183 | ||
a8b3b0b6 CR |
6184 | /* See if the derived type was labeled as bind(c). */ |
6185 | if (attr.is_bind_c != 0) | |
6186 | sym->attr.is_bind_c = attr.is_bind_c; | |
6187 | ||
6de9cd9a DN |
6188 | gfc_new_block = sym; |
6189 | ||
6190 | return MATCH_YES; | |
6191 | } | |
83d890b9 AL |
6192 | |
6193 | ||
6194 | /* Cray Pointees can be declared as: | |
6195 | pointer (ipt, a (n,m,...,*)) | |
6196 | By default, this is treated as an AS_ASSUMED_SIZE array. We'll | |
6197 | cheat and set a constant bound of 1 for the last dimension, if this | |
6198 | is the case. Since there is no bounds-checking for Cray Pointees, | |
6199 | this will be okay. */ | |
6200 | ||
6201 | try | |
6202 | gfc_mod_pointee_as (gfc_array_spec *as) | |
6203 | { | |
6204 | as->cray_pointee = true; /* This will be useful to know later. */ | |
6205 | if (as->type == AS_ASSUMED_SIZE) | |
6206 | { | |
6207 | as->type = AS_EXPLICIT; | |
6208 | as->upper[as->rank - 1] = gfc_int_expr (1); | |
6209 | as->cp_was_assumed = true; | |
6210 | } | |
6211 | else if (as->type == AS_ASSUMED_SHAPE) | |
6212 | { | |
6213 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
6214 | return MATCH_ERROR; | |
6215 | } | |
6216 | return MATCH_YES; | |
6217 | } | |
25d8f0a2 TS |
6218 | |
6219 | ||
6220 | /* Match the enum definition statement, here we are trying to match | |
6221 | the first line of enum definition statement. | |
6222 | Returns MATCH_YES if match is found. */ | |
6223 | ||
6224 | match | |
6225 | gfc_match_enum (void) | |
6226 | { | |
6227 | match m; | |
6228 | ||
6229 | m = gfc_match_eos (); | |
6230 | if (m != MATCH_YES) | |
6231 | return m; | |
6232 | ||
6133c68a | 6233 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") |
25d8f0a2 TS |
6234 | == FAILURE) |
6235 | return MATCH_ERROR; | |
6236 | ||
6237 | return MATCH_YES; | |
6238 | } | |
6239 | ||
6240 | ||
6133c68a TS |
6241 | /* Match a variable name with an optional initializer. When this |
6242 | subroutine is called, a variable is expected to be parsed next. | |
6243 | Depending on what is happening at the moment, updates either the | |
6244 | symbol table or the current interface. */ | |
6245 | ||
6246 | static match | |
6247 | enumerator_decl (void) | |
6248 | { | |
6249 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6250 | gfc_expr *initializer; | |
6251 | gfc_array_spec *as = NULL; | |
6252 | gfc_symbol *sym; | |
6253 | locus var_locus; | |
6254 | match m; | |
6255 | try t; | |
6256 | locus old_locus; | |
6257 | ||
6258 | initializer = NULL; | |
6259 | old_locus = gfc_current_locus; | |
6260 | ||
6261 | /* When we get here, we've just matched a list of attributes and | |
6262 | maybe a type and a double colon. The next thing we expect to see | |
6263 | is the name of the symbol. */ | |
6264 | m = gfc_match_name (name); | |
6265 | if (m != MATCH_YES) | |
6266 | goto cleanup; | |
6267 | ||
6268 | var_locus = gfc_current_locus; | |
6269 | ||
6270 | /* OK, we've successfully matched the declaration. Now put the | |
6271 | symbol in the current namespace. If we fail to create the symbol, | |
6272 | bail out. */ | |
6273 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
6274 | { | |
6275 | m = MATCH_ERROR; | |
6276 | goto cleanup; | |
6277 | } | |
6278 | ||
6279 | /* The double colon must be present in order to have initializers. | |
6280 | Otherwise the statement is ambiguous with an assignment statement. */ | |
6281 | if (colon_seen) | |
6282 | { | |
6283 | if (gfc_match_char ('=') == MATCH_YES) | |
6284 | { | |
6285 | m = gfc_match_init_expr (&initializer); | |
6286 | if (m == MATCH_NO) | |
6287 | { | |
6288 | gfc_error ("Expected an initialization expression at %C"); | |
6289 | m = MATCH_ERROR; | |
6290 | } | |
6291 | ||
6292 | if (m != MATCH_YES) | |
6293 | goto cleanup; | |
6294 | } | |
6295 | } | |
6296 | ||
6297 | /* If we do not have an initializer, the initialization value of the | |
6298 | previous enumerator (stored in last_initializer) is incremented | |
6299 | by 1 and is used to initialize the current enumerator. */ | |
6300 | if (initializer == NULL) | |
6301 | initializer = gfc_enum_initializer (last_initializer, old_locus); | |
d51347f9 | 6302 | |
6133c68a TS |
6303 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
6304 | { | |
6305 | gfc_error("ENUMERATOR %L not initialized with integer expression", | |
6306 | &var_locus); | |
d51347f9 | 6307 | m = MATCH_ERROR; |
6133c68a TS |
6308 | gfc_free_enum_history (); |
6309 | goto cleanup; | |
6310 | } | |
6311 | ||
6312 | /* Store this current initializer, for the next enumerator variable | |
6313 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
6314 | use last_initializer below. */ | |
6315 | last_initializer = initializer; | |
6316 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
6317 | ||
6318 | /* Maintain enumerator history. */ | |
6319 | gfc_find_symbol (name, NULL, 0, &sym); | |
6320 | create_enum_history (sym, last_initializer); | |
6321 | ||
6322 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
6323 | ||
6324 | cleanup: | |
6325 | /* Free stuff up and return. */ | |
6326 | gfc_free_expr (initializer); | |
6327 | ||
6328 | return m; | |
6329 | } | |
6330 | ||
6331 | ||
66e4ab31 | 6332 | /* Match the enumerator definition statement. */ |
25d8f0a2 TS |
6333 | |
6334 | match | |
6335 | gfc_match_enumerator_def (void) | |
6336 | { | |
6337 | match m; | |
6133c68a | 6338 | try t; |
d51347f9 | 6339 | |
25d8f0a2 | 6340 | gfc_clear_ts (¤t_ts); |
d51347f9 | 6341 | |
25d8f0a2 TS |
6342 | m = gfc_match (" enumerator"); |
6343 | if (m != MATCH_YES) | |
6344 | return m; | |
6133c68a TS |
6345 | |
6346 | m = gfc_match (" :: "); | |
6347 | if (m == MATCH_ERROR) | |
6348 | return m; | |
6349 | ||
6350 | colon_seen = (m == MATCH_YES); | |
d51347f9 | 6351 | |
25d8f0a2 TS |
6352 | if (gfc_current_state () != COMP_ENUM) |
6353 | { | |
6354 | gfc_error ("ENUM definition statement expected before %C"); | |
6355 | gfc_free_enum_history (); | |
6356 | return MATCH_ERROR; | |
6357 | } | |
6358 | ||
6359 | (¤t_ts)->type = BT_INTEGER; | |
6360 | (¤t_ts)->kind = gfc_c_int_kind; | |
d51347f9 | 6361 | |
6133c68a TS |
6362 | gfc_clear_attr (¤t_attr); |
6363 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
6364 | if (t == FAILURE) | |
25d8f0a2 | 6365 | { |
6133c68a | 6366 | m = MATCH_ERROR; |
25d8f0a2 TS |
6367 | goto cleanup; |
6368 | } | |
6369 | ||
25d8f0a2 TS |
6370 | for (;;) |
6371 | { | |
6133c68a | 6372 | m = enumerator_decl (); |
25d8f0a2 TS |
6373 | if (m == MATCH_ERROR) |
6374 | goto cleanup; | |
6375 | if (m == MATCH_NO) | |
6376 | break; | |
6377 | ||
6378 | if (gfc_match_eos () == MATCH_YES) | |
6379 | goto cleanup; | |
6380 | if (gfc_match_char (',') != MATCH_YES) | |
6381 | break; | |
6382 | } | |
6383 | ||
6384 | if (gfc_current_state () == COMP_ENUM) | |
6385 | { | |
6386 | gfc_free_enum_history (); | |
6387 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
6388 | m = MATCH_ERROR; | |
6389 | } | |
6390 | ||
6391 | cleanup: | |
6392 | gfc_free_array_spec (current_as); | |
6393 | current_as = NULL; | |
6394 | return m; | |
6395 | ||
6396 | } | |
6397 |