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Commit | Line | Data |
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6de9cd9a | 1 | /* Declaration statement matcher |
835aac92 | 2 | Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 |
636dff67 | 3 | Free Software Foundation, Inc. |
6de9cd9a DN |
4 | Contributed by Andy Vaught |
5 | ||
9fc4d79b | 6 | This file is part of GCC. |
6de9cd9a | 7 | |
9fc4d79b TS |
8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
d234d788 | 10 | Software Foundation; either version 3, or (at your option) any later |
9fc4d79b | 11 | version. |
6de9cd9a | 12 | |
9fc4d79b TS |
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
6de9cd9a DN |
17 | |
18 | You should have received a copy of the GNU General Public License | |
d234d788 NC |
19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a | 21 | |
6de9cd9a | 22 | #include "config.h" |
d22e4895 | 23 | #include "system.h" |
6de9cd9a DN |
24 | #include "gfortran.h" |
25 | #include "match.h" | |
26 | #include "parse.h" | |
6de9cd9a | 27 | |
ca39e6f2 FXC |
28 | |
29 | /* Macros to access allocate memory for gfc_data_variable, | |
30 | gfc_data_value and gfc_data. */ | |
ece3f663 KG |
31 | #define gfc_get_data_variable() XCNEW (gfc_data_variable) |
32 | #define gfc_get_data_value() XCNEW (gfc_data_value) | |
33 | #define gfc_get_data() XCNEW (gfc_data) | |
ca39e6f2 FXC |
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 | ||
1c8bcdf7 | 89 | bool gfc_matching_function; |
e2d29968 | 90 | |
6de9cd9a | 91 | |
294fbfc8 TS |
92 | /********************* DATA statement subroutines *********************/ |
93 | ||
2220652d PT |
94 | static bool in_match_data = false; |
95 | ||
96 | bool | |
97 | gfc_in_match_data (void) | |
98 | { | |
99 | return in_match_data; | |
100 | } | |
101 | ||
ca39e6f2 FXC |
102 | static void |
103 | set_in_match_data (bool set_value) | |
2220652d PT |
104 | { |
105 | in_match_data = set_value; | |
106 | } | |
107 | ||
294fbfc8 TS |
108 | /* Free a gfc_data_variable structure and everything beneath it. */ |
109 | ||
110 | static void | |
636dff67 | 111 | free_variable (gfc_data_variable *p) |
294fbfc8 TS |
112 | { |
113 | gfc_data_variable *q; | |
114 | ||
115 | for (; p; p = q) | |
116 | { | |
117 | q = p->next; | |
118 | gfc_free_expr (p->expr); | |
119 | gfc_free_iterator (&p->iter, 0); | |
120 | free_variable (p->list); | |
294fbfc8 TS |
121 | gfc_free (p); |
122 | } | |
123 | } | |
124 | ||
125 | ||
126 | /* Free a gfc_data_value structure and everything beneath it. */ | |
127 | ||
128 | static void | |
636dff67 | 129 | free_value (gfc_data_value *p) |
294fbfc8 TS |
130 | { |
131 | gfc_data_value *q; | |
132 | ||
133 | for (; p; p = q) | |
134 | { | |
135 | q = p->next; | |
136 | gfc_free_expr (p->expr); | |
137 | gfc_free (p); | |
138 | } | |
139 | } | |
140 | ||
141 | ||
142 | /* Free a list of gfc_data structures. */ | |
143 | ||
144 | void | |
636dff67 | 145 | gfc_free_data (gfc_data *p) |
294fbfc8 TS |
146 | { |
147 | gfc_data *q; | |
148 | ||
149 | for (; p; p = q) | |
150 | { | |
151 | q = p->next; | |
294fbfc8 TS |
152 | free_variable (p->var); |
153 | free_value (p->value); | |
294fbfc8 TS |
154 | gfc_free (p); |
155 | } | |
156 | } | |
157 | ||
158 | ||
a9f6f1f2 | 159 | /* Free all data in a namespace. */ |
636dff67 | 160 | |
a9f6f1f2 | 161 | static void |
66e4ab31 | 162 | gfc_free_data_all (gfc_namespace *ns) |
a9f6f1f2 JD |
163 | { |
164 | gfc_data *d; | |
165 | ||
166 | for (;ns->data;) | |
167 | { | |
168 | d = ns->data->next; | |
169 | gfc_free (ns->data); | |
170 | ns->data = d; | |
171 | } | |
172 | } | |
173 | ||
174 | ||
294fbfc8 TS |
175 | static match var_element (gfc_data_variable *); |
176 | ||
177 | /* Match a list of variables terminated by an iterator and a right | |
178 | parenthesis. */ | |
179 | ||
180 | static match | |
636dff67 | 181 | var_list (gfc_data_variable *parent) |
294fbfc8 TS |
182 | { |
183 | gfc_data_variable *tail, var; | |
184 | match m; | |
185 | ||
186 | m = var_element (&var); | |
187 | if (m == MATCH_ERROR) | |
188 | return MATCH_ERROR; | |
189 | if (m == MATCH_NO) | |
190 | goto syntax; | |
191 | ||
192 | tail = gfc_get_data_variable (); | |
193 | *tail = var; | |
194 | ||
195 | parent->list = tail; | |
196 | ||
197 | for (;;) | |
198 | { | |
199 | if (gfc_match_char (',') != MATCH_YES) | |
200 | goto syntax; | |
201 | ||
202 | m = gfc_match_iterator (&parent->iter, 1); | |
203 | if (m == MATCH_YES) | |
204 | break; | |
205 | if (m == MATCH_ERROR) | |
206 | return MATCH_ERROR; | |
207 | ||
208 | m = var_element (&var); | |
209 | if (m == MATCH_ERROR) | |
210 | return MATCH_ERROR; | |
211 | if (m == MATCH_NO) | |
212 | goto syntax; | |
213 | ||
214 | tail->next = gfc_get_data_variable (); | |
215 | tail = tail->next; | |
216 | ||
217 | *tail = var; | |
218 | } | |
219 | ||
220 | if (gfc_match_char (')') != MATCH_YES) | |
221 | goto syntax; | |
222 | return MATCH_YES; | |
223 | ||
224 | syntax: | |
225 | gfc_syntax_error (ST_DATA); | |
226 | return MATCH_ERROR; | |
227 | } | |
228 | ||
229 | ||
230 | /* Match a single element in a data variable list, which can be a | |
231 | variable-iterator list. */ | |
232 | ||
233 | static match | |
7b901ac4 | 234 | var_element (gfc_data_variable *new_var) |
294fbfc8 TS |
235 | { |
236 | match m; | |
237 | gfc_symbol *sym; | |
238 | ||
7b901ac4 | 239 | memset (new_var, 0, sizeof (gfc_data_variable)); |
294fbfc8 TS |
240 | |
241 | if (gfc_match_char ('(') == MATCH_YES) | |
7b901ac4 | 242 | return var_list (new_var); |
294fbfc8 | 243 | |
7b901ac4 | 244 | m = gfc_match_variable (&new_var->expr, 0); |
294fbfc8 TS |
245 | if (m != MATCH_YES) |
246 | return m; | |
247 | ||
7b901ac4 | 248 | sym = new_var->expr->symtree->n.sym; |
294fbfc8 | 249 | |
636dff67 SK |
250 | if (!sym->attr.function && gfc_current_ns->parent |
251 | && gfc_current_ns->parent == sym->ns) | |
294fbfc8 | 252 | { |
4075a94e | 253 | gfc_error ("Host associated variable '%s' may not be in the DATA " |
e25a0da3 | 254 | "statement at %C", sym->name); |
294fbfc8 TS |
255 | return MATCH_ERROR; |
256 | } | |
257 | ||
4075a94e | 258 | if (gfc_current_state () != COMP_BLOCK_DATA |
636dff67 SK |
259 | && sym->attr.in_common |
260 | && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of " | |
261 | "common block variable '%s' in DATA statement at %C", | |
262 | sym->name) == FAILURE) | |
4075a94e | 263 | return MATCH_ERROR; |
294fbfc8 | 264 | |
7b901ac4 | 265 | if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE) |
294fbfc8 TS |
266 | return MATCH_ERROR; |
267 | ||
268 | return MATCH_YES; | |
269 | } | |
270 | ||
271 | ||
272 | /* Match the top-level list of data variables. */ | |
273 | ||
274 | static match | |
636dff67 | 275 | top_var_list (gfc_data *d) |
294fbfc8 | 276 | { |
7b901ac4 | 277 | gfc_data_variable var, *tail, *new_var; |
294fbfc8 TS |
278 | match m; |
279 | ||
280 | tail = NULL; | |
281 | ||
282 | for (;;) | |
283 | { | |
284 | m = var_element (&var); | |
285 | if (m == MATCH_NO) | |
286 | goto syntax; | |
287 | if (m == MATCH_ERROR) | |
288 | return MATCH_ERROR; | |
289 | ||
7b901ac4 KG |
290 | new_var = gfc_get_data_variable (); |
291 | *new_var = var; | |
294fbfc8 TS |
292 | |
293 | if (tail == NULL) | |
7b901ac4 | 294 | d->var = new_var; |
294fbfc8 | 295 | else |
7b901ac4 | 296 | tail->next = new_var; |
294fbfc8 | 297 | |
7b901ac4 | 298 | tail = new_var; |
294fbfc8 TS |
299 | |
300 | if (gfc_match_char ('/') == MATCH_YES) | |
301 | break; | |
302 | if (gfc_match_char (',') != MATCH_YES) | |
303 | goto syntax; | |
304 | } | |
305 | ||
306 | return MATCH_YES; | |
307 | ||
308 | syntax: | |
309 | gfc_syntax_error (ST_DATA); | |
a9f6f1f2 | 310 | gfc_free_data_all (gfc_current_ns); |
294fbfc8 TS |
311 | return MATCH_ERROR; |
312 | } | |
313 | ||
314 | ||
315 | static match | |
636dff67 | 316 | match_data_constant (gfc_expr **result) |
294fbfc8 TS |
317 | { |
318 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
319 | gfc_symbol *sym; | |
320 | gfc_expr *expr; | |
321 | match m; | |
36d3fb4c | 322 | locus old_loc; |
294fbfc8 TS |
323 | |
324 | m = gfc_match_literal_constant (&expr, 1); | |
325 | if (m == MATCH_YES) | |
326 | { | |
327 | *result = expr; | |
328 | return MATCH_YES; | |
329 | } | |
330 | ||
331 | if (m == MATCH_ERROR) | |
332 | return MATCH_ERROR; | |
333 | ||
334 | m = gfc_match_null (result); | |
335 | if (m != MATCH_NO) | |
336 | return m; | |
337 | ||
36d3fb4c PT |
338 | old_loc = gfc_current_locus; |
339 | ||
340 | /* Should this be a structure component, try to match it | |
341 | before matching a name. */ | |
342 | m = gfc_match_rvalue (result); | |
343 | if (m == MATCH_ERROR) | |
344 | return m; | |
345 | ||
346 | if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE) | |
347 | { | |
348 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
349 | m = MATCH_ERROR; | |
350 | return m; | |
351 | } | |
352 | ||
353 | gfc_current_locus = old_loc; | |
354 | ||
294fbfc8 TS |
355 | m = gfc_match_name (name); |
356 | if (m != MATCH_YES) | |
357 | return m; | |
358 | ||
359 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
360 | return MATCH_ERROR; | |
361 | ||
362 | if (sym == NULL | |
363 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
364 | { | |
365 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
366 | name); | |
367 | return MATCH_ERROR; | |
368 | } | |
369 | else if (sym->attr.flavor == FL_DERIVED) | |
7d1f1e61 | 370 | return gfc_match_structure_constructor (sym, result, false); |
294fbfc8 | 371 | |
d46e0870 JD |
372 | /* Check to see if the value is an initialization array expression. */ |
373 | if (sym->value->expr_type == EXPR_ARRAY) | |
374 | { | |
375 | gfc_current_locus = old_loc; | |
376 | ||
377 | m = gfc_match_init_expr (result); | |
378 | if (m == MATCH_ERROR) | |
379 | return m; | |
380 | ||
381 | if (m == MATCH_YES) | |
382 | { | |
383 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
384 | m = MATCH_ERROR; | |
385 | ||
386 | if ((*result)->expr_type == EXPR_CONSTANT) | |
387 | return m; | |
388 | else | |
389 | { | |
390 | gfc_error ("Invalid initializer %s in Data statement at %C", name); | |
391 | return MATCH_ERROR; | |
392 | } | |
393 | } | |
394 | } | |
395 | ||
294fbfc8 TS |
396 | *result = gfc_copy_expr (sym->value); |
397 | return MATCH_YES; | |
398 | } | |
399 | ||
400 | ||
401 | /* Match a list of values in a DATA statement. The leading '/' has | |
402 | already been seen at this point. */ | |
403 | ||
404 | static match | |
636dff67 | 405 | top_val_list (gfc_data *data) |
294fbfc8 | 406 | { |
7b901ac4 | 407 | gfc_data_value *new_val, *tail; |
294fbfc8 | 408 | gfc_expr *expr; |
294fbfc8 TS |
409 | match m; |
410 | ||
411 | tail = NULL; | |
412 | ||
413 | for (;;) | |
414 | { | |
415 | m = match_data_constant (&expr); | |
416 | if (m == MATCH_NO) | |
417 | goto syntax; | |
418 | if (m == MATCH_ERROR) | |
419 | return MATCH_ERROR; | |
420 | ||
7b901ac4 KG |
421 | new_val = gfc_get_data_value (); |
422 | mpz_init (new_val->repeat); | |
294fbfc8 TS |
423 | |
424 | if (tail == NULL) | |
7b901ac4 | 425 | data->value = new_val; |
294fbfc8 | 426 | else |
7b901ac4 | 427 | tail->next = new_val; |
294fbfc8 | 428 | |
7b901ac4 | 429 | tail = new_val; |
294fbfc8 TS |
430 | |
431 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
432 | { | |
433 | tail->expr = expr; | |
f2112868 | 434 | mpz_set_ui (tail->repeat, 1); |
294fbfc8 TS |
435 | } |
436 | else | |
437 | { | |
f2112868 SK |
438 | if (expr->ts.type == BT_INTEGER) |
439 | mpz_set (tail->repeat, expr->value.integer); | |
294fbfc8 | 440 | gfc_free_expr (expr); |
294fbfc8 TS |
441 | |
442 | m = match_data_constant (&tail->expr); | |
443 | if (m == MATCH_NO) | |
444 | goto syntax; | |
445 | if (m == MATCH_ERROR) | |
446 | return MATCH_ERROR; | |
447 | } | |
448 | ||
449 | if (gfc_match_char ('/') == MATCH_YES) | |
450 | break; | |
451 | if (gfc_match_char (',') == MATCH_NO) | |
452 | goto syntax; | |
453 | } | |
454 | ||
455 | return MATCH_YES; | |
456 | ||
457 | syntax: | |
458 | gfc_syntax_error (ST_DATA); | |
a9f6f1f2 | 459 | gfc_free_data_all (gfc_current_ns); |
294fbfc8 TS |
460 | return MATCH_ERROR; |
461 | } | |
462 | ||
463 | ||
464 | /* Matches an old style initialization. */ | |
465 | ||
466 | static match | |
467 | match_old_style_init (const char *name) | |
468 | { | |
469 | match m; | |
470 | gfc_symtree *st; | |
ed0e3607 | 471 | gfc_symbol *sym; |
294fbfc8 TS |
472 | gfc_data *newdata; |
473 | ||
474 | /* Set up data structure to hold initializers. */ | |
475 | gfc_find_sym_tree (name, NULL, 0, &st); | |
ed0e3607 AL |
476 | sym = st->n.sym; |
477 | ||
294fbfc8 TS |
478 | newdata = gfc_get_data (); |
479 | newdata->var = gfc_get_data_variable (); | |
480 | newdata->var->expr = gfc_get_variable_expr (st); | |
8c5c0b80 | 481 | newdata->where = gfc_current_locus; |
294fbfc8 | 482 | |
66e4ab31 | 483 | /* Match initial value list. This also eats the terminal '/'. */ |
294fbfc8 TS |
484 | m = top_val_list (newdata); |
485 | if (m != MATCH_YES) | |
486 | { | |
487 | gfc_free (newdata); | |
488 | return m; | |
489 | } | |
490 | ||
491 | if (gfc_pure (NULL)) | |
492 | { | |
493 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
494 | gfc_free (newdata); | |
495 | return MATCH_ERROR; | |
496 | } | |
497 | ||
ed0e3607 AL |
498 | /* Mark the variable as having appeared in a data statement. */ |
499 | if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) | |
500 | { | |
501 | gfc_free (newdata); | |
502 | return MATCH_ERROR; | |
503 | } | |
504 | ||
294fbfc8 TS |
505 | /* Chain in namespace list of DATA initializers. */ |
506 | newdata->next = gfc_current_ns->data; | |
507 | gfc_current_ns->data = newdata; | |
508 | ||
509 | return m; | |
510 | } | |
511 | ||
636dff67 | 512 | |
294fbfc8 | 513 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
13795658 | 514 | we are matching a DATA statement and are therefore issuing an error |
d51347f9 | 515 | if we encounter something unexpected, if not, we're trying to match |
69de3b83 | 516 | an old-style initialization expression of the form INTEGER I /2/. */ |
294fbfc8 TS |
517 | |
518 | match | |
519 | gfc_match_data (void) | |
520 | { | |
7b901ac4 | 521 | gfc_data *new_data; |
294fbfc8 TS |
522 | match m; |
523 | ||
ca39e6f2 | 524 | set_in_match_data (true); |
2220652d | 525 | |
294fbfc8 TS |
526 | for (;;) |
527 | { | |
7b901ac4 KG |
528 | new_data = gfc_get_data (); |
529 | new_data->where = gfc_current_locus; | |
294fbfc8 | 530 | |
7b901ac4 | 531 | m = top_var_list (new_data); |
294fbfc8 TS |
532 | if (m != MATCH_YES) |
533 | goto cleanup; | |
534 | ||
7b901ac4 | 535 | m = top_val_list (new_data); |
294fbfc8 TS |
536 | if (m != MATCH_YES) |
537 | goto cleanup; | |
538 | ||
7b901ac4 KG |
539 | new_data->next = gfc_current_ns->data; |
540 | gfc_current_ns->data = new_data; | |
294fbfc8 TS |
541 | |
542 | if (gfc_match_eos () == MATCH_YES) | |
543 | break; | |
544 | ||
545 | gfc_match_char (','); /* Optional comma */ | |
546 | } | |
547 | ||
ca39e6f2 | 548 | set_in_match_data (false); |
2220652d | 549 | |
294fbfc8 TS |
550 | if (gfc_pure (NULL)) |
551 | { | |
552 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
553 | return MATCH_ERROR; | |
554 | } | |
555 | ||
556 | return MATCH_YES; | |
557 | ||
558 | cleanup: | |
ca39e6f2 | 559 | set_in_match_data (false); |
7b901ac4 | 560 | gfc_free_data (new_data); |
294fbfc8 TS |
561 | return MATCH_ERROR; |
562 | } | |
563 | ||
564 | ||
565 | /************************ Declaration statements *********************/ | |
566 | ||
6de9cd9a DN |
567 | /* Match an intent specification. Since this can only happen after an |
568 | INTENT word, a legal intent-spec must follow. */ | |
569 | ||
570 | static sym_intent | |
571 | match_intent_spec (void) | |
572 | { | |
573 | ||
574 | if (gfc_match (" ( in out )") == MATCH_YES) | |
575 | return INTENT_INOUT; | |
576 | if (gfc_match (" ( in )") == MATCH_YES) | |
577 | return INTENT_IN; | |
578 | if (gfc_match (" ( out )") == MATCH_YES) | |
579 | return INTENT_OUT; | |
580 | ||
581 | gfc_error ("Bad INTENT specification at %C"); | |
582 | return INTENT_UNKNOWN; | |
583 | } | |
584 | ||
585 | ||
586 | /* Matches a character length specification, which is either a | |
587 | specification expression or a '*'. */ | |
588 | ||
589 | static match | |
636dff67 | 590 | char_len_param_value (gfc_expr **expr) |
6de9cd9a | 591 | { |
cba28dad JD |
592 | match m; |
593 | ||
6de9cd9a DN |
594 | if (gfc_match_char ('*') == MATCH_YES) |
595 | { | |
596 | *expr = NULL; | |
597 | return MATCH_YES; | |
598 | } | |
599 | ||
cba28dad JD |
600 | m = gfc_match_expr (expr); |
601 | if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION) | |
602 | { | |
603 | if ((*expr)->value.function.actual | |
604 | && (*expr)->value.function.actual->expr->symtree) | |
605 | { | |
606 | gfc_expr *e; | |
607 | e = (*expr)->value.function.actual->expr; | |
608 | if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE | |
609 | && e->expr_type == EXPR_VARIABLE) | |
610 | { | |
611 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) | |
612 | goto syntax; | |
613 | if (e->symtree->n.sym->ts.type == BT_CHARACTER | |
614 | && e->symtree->n.sym->ts.cl | |
615 | && e->symtree->n.sym->ts.cl->length->ts.type == BT_UNKNOWN) | |
616 | goto syntax; | |
617 | } | |
618 | } | |
619 | } | |
620 | return m; | |
621 | ||
622 | syntax: | |
623 | gfc_error ("Conflict in attributes of function argument at %C"); | |
624 | return MATCH_ERROR; | |
6de9cd9a DN |
625 | } |
626 | ||
627 | ||
628 | /* A character length is a '*' followed by a literal integer or a | |
629 | char_len_param_value in parenthesis. */ | |
630 | ||
631 | static match | |
636dff67 | 632 | match_char_length (gfc_expr **expr) |
6de9cd9a | 633 | { |
5cf54585 | 634 | int length; |
6de9cd9a DN |
635 | match m; |
636 | ||
637 | m = gfc_match_char ('*'); | |
638 | if (m != MATCH_YES) | |
639 | return m; | |
640 | ||
5cf54585 | 641 | m = gfc_match_small_literal_int (&length, NULL); |
6de9cd9a DN |
642 | if (m == MATCH_ERROR) |
643 | return m; | |
644 | ||
645 | if (m == MATCH_YES) | |
646 | { | |
647 | *expr = gfc_int_expr (length); | |
648 | return m; | |
649 | } | |
650 | ||
651 | if (gfc_match_char ('(') == MATCH_NO) | |
652 | goto syntax; | |
653 | ||
654 | m = char_len_param_value (expr); | |
1c8bcdf7 PT |
655 | if (m != MATCH_YES && gfc_matching_function) |
656 | { | |
657 | gfc_undo_symbols (); | |
658 | m = MATCH_YES; | |
659 | } | |
660 | ||
6de9cd9a DN |
661 | if (m == MATCH_ERROR) |
662 | return m; | |
663 | if (m == MATCH_NO) | |
664 | goto syntax; | |
665 | ||
666 | if (gfc_match_char (')') == MATCH_NO) | |
667 | { | |
668 | gfc_free_expr (*expr); | |
669 | *expr = NULL; | |
670 | goto syntax; | |
671 | } | |
672 | ||
673 | return MATCH_YES; | |
674 | ||
675 | syntax: | |
676 | gfc_error ("Syntax error in character length specification at %C"); | |
677 | return MATCH_ERROR; | |
678 | } | |
679 | ||
680 | ||
9e35b386 EE |
681 | /* Special subroutine for finding a symbol. Check if the name is found |
682 | in the current name space. If not, and we're compiling a function or | |
683 | subroutine and the parent compilation unit is an interface, then check | |
684 | to see if the name we've been given is the name of the interface | |
685 | (located in another namespace). */ | |
6de9cd9a DN |
686 | |
687 | static int | |
636dff67 | 688 | find_special (const char *name, gfc_symbol **result) |
6de9cd9a DN |
689 | { |
690 | gfc_state_data *s; | |
9e35b386 | 691 | int i; |
6de9cd9a | 692 | |
9e35b386 | 693 | i = gfc_get_symbol (name, NULL, result); |
d51347f9 | 694 | if (i == 0) |
9e35b386 | 695 | goto end; |
d51347f9 | 696 | |
6de9cd9a DN |
697 | if (gfc_current_state () != COMP_SUBROUTINE |
698 | && gfc_current_state () != COMP_FUNCTION) | |
9e35b386 | 699 | goto end; |
6de9cd9a DN |
700 | |
701 | s = gfc_state_stack->previous; | |
702 | if (s == NULL) | |
9e35b386 | 703 | goto end; |
6de9cd9a DN |
704 | |
705 | if (s->state != COMP_INTERFACE) | |
9e35b386 | 706 | goto end; |
6de9cd9a | 707 | if (s->sym == NULL) |
66e4ab31 | 708 | goto end; /* Nameless interface. */ |
6de9cd9a DN |
709 | |
710 | if (strcmp (name, s->sym->name) == 0) | |
711 | { | |
712 | *result = s->sym; | |
713 | return 0; | |
714 | } | |
715 | ||
9e35b386 EE |
716 | end: |
717 | return i; | |
6de9cd9a DN |
718 | } |
719 | ||
720 | ||
721 | /* Special subroutine for getting a symbol node associated with a | |
722 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
723 | symbol is created in the parent using with symtree node in the | |
724 | child unit pointing to the symbol. If the current namespace has no | |
725 | parent, then the symbol is just created in the current unit. */ | |
726 | ||
727 | static int | |
636dff67 | 728 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
6de9cd9a DN |
729 | { |
730 | gfc_symtree *st; | |
731 | gfc_symbol *sym; | |
a7ca4d8d | 732 | int rc = 0; |
6de9cd9a | 733 | |
1a492601 PT |
734 | /* Module functions have to be left in their own namespace because |
735 | they have potentially (almost certainly!) already been referenced. | |
736 | In this sense, they are rather like external functions. This is | |
737 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
738 | space is set to point to the master function, so that the fake | |
739 | result mechanism can work. */ | |
740 | if (module_fcn_entry) | |
6c12686b PT |
741 | { |
742 | /* Present if entry is declared to be a module procedure. */ | |
743 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); | |
aa84a9a5 | 744 | |
6c12686b PT |
745 | if (*result == NULL) |
746 | rc = gfc_get_symbol (name, NULL, result); | |
2e32a71e | 747 | else if (!gfc_get_symbol (name, NULL, &sym) && sym |
aa84a9a5 PT |
748 | && (*result)->ts.type == BT_UNKNOWN |
749 | && sym->attr.flavor == FL_UNKNOWN) | |
750 | /* Pick up the typespec for the entry, if declared in the function | |
751 | body. Note that this symbol is FL_UNKNOWN because it will | |
752 | only have appeared in a type declaration. The local symtree | |
753 | is set to point to the module symbol and a unique symtree | |
754 | to the local version. This latter ensures a correct clearing | |
755 | of the symbols. */ | |
2e32a71e PT |
756 | { |
757 | /* If the ENTRY proceeds its specification, we need to ensure | |
758 | that this does not raise a "has no IMPLICIT type" error. */ | |
759 | if (sym->ts.type == BT_UNKNOWN) | |
0e5a218b | 760 | sym->attr.untyped = 1; |
2e32a71e | 761 | |
0e5a218b | 762 | (*result)->ts = sym->ts; |
2e32a71e PT |
763 | |
764 | /* Put the symbol in the procedure namespace so that, should | |
df2fba9e | 765 | the ENTRY precede its specification, the specification |
2e32a71e PT |
766 | can be applied. */ |
767 | (*result)->ns = gfc_current_ns; | |
768 | ||
769 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); | |
770 | st->n.sym = *result; | |
771 | st = gfc_get_unique_symtree (gfc_current_ns); | |
772 | st->n.sym = sym; | |
773 | } | |
6c12686b | 774 | } |
68ea355b PT |
775 | else |
776 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
6de9cd9a | 777 | |
a7ca4d8d PT |
778 | if (rc) |
779 | return rc; | |
780 | ||
68ea355b | 781 | sym = *result; |
2c693a24 | 782 | gfc_current_ns->refs++; |
6de9cd9a | 783 | |
7b901ac4 | 784 | if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE) |
68ea355b | 785 | { |
cda7004b PT |
786 | /* Trap another encompassed procedure with the same name. All |
787 | these conditions are necessary to avoid picking up an entry | |
788 | whose name clashes with that of the encompassing procedure; | |
789 | this is handled using gsymbols to register unique,globally | |
790 | accessible names. */ | |
68ea355b | 791 | if (sym->attr.flavor != 0 |
636dff67 SK |
792 | && sym->attr.proc != 0 |
793 | && (sym->attr.subroutine || sym->attr.function) | |
794 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
68ea355b PT |
795 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
796 | name, &sym->declared_at); | |
797 | ||
fd3e70af JD |
798 | /* Trap a procedure with a name the same as interface in the |
799 | encompassing scope. */ | |
800 | if (sym->attr.generic != 0 | |
2305fa31 JD |
801 | && (sym->attr.subroutine || sym->attr.function) |
802 | && !sym->attr.mod_proc) | |
fd3e70af JD |
803 | gfc_error_now ("Name '%s' at %C is already defined" |
804 | " as a generic interface at %L", | |
805 | name, &sym->declared_at); | |
806 | ||
68ea355b PT |
807 | /* Trap declarations of attributes in encompassing scope. The |
808 | signature for this is that ts.kind is set. Legitimate | |
809 | references only set ts.type. */ | |
810 | if (sym->ts.kind != 0 | |
636dff67 SK |
811 | && !sym->attr.implicit_type |
812 | && sym->attr.proc == 0 | |
813 | && gfc_current_ns->parent != NULL | |
814 | && sym->attr.access == 0 | |
815 | && !module_fcn_entry) | |
816 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
817 | "and must not have attributes declared at %L", | |
68ea355b PT |
818 | name, &sym->declared_at); |
819 | } | |
820 | ||
821 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
822 | return rc; | |
6de9cd9a | 823 | |
1a492601 PT |
824 | /* Module function entries will already have a symtree in |
825 | the current namespace but will need one at module level. */ | |
826 | if (module_fcn_entry) | |
6c12686b PT |
827 | { |
828 | /* Present if entry is declared to be a module procedure. */ | |
829 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); | |
830 | if (st == NULL) | |
831 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
832 | } | |
1a492601 PT |
833 | else |
834 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
6de9cd9a | 835 | |
6de9cd9a DN |
836 | st->n.sym = sym; |
837 | sym->refs++; | |
838 | ||
66e4ab31 | 839 | /* See if the procedure should be a module procedure. */ |
6de9cd9a | 840 | |
1a492601 | 841 | if (((sym->ns->proc_name != NULL |
6c12686b PT |
842 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
843 | && sym->attr.proc != PROC_MODULE) | |
844 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) | |
845 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
846 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
847 | rc = 2; |
848 | ||
849 | return rc; | |
850 | } | |
851 | ||
852 | ||
a8b3b0b6 CR |
853 | /* Verify that the given symbol representing a parameter is C |
854 | interoperable, by checking to see if it was marked as such after | |
855 | its declaration. If the given symbol is not interoperable, a | |
856 | warning is reported, thus removing the need to return the status to | |
857 | the calling function. The standard does not require the user use | |
858 | one of the iso_c_binding named constants to declare an | |
859 | interoperable parameter, but we can't be sure if the param is C | |
860 | interop or not if the user doesn't. For example, integer(4) may be | |
861 | legal Fortran, but doesn't have meaning in C. It may interop with | |
862 | a number of the C types, which causes a problem because the | |
863 | compiler can't know which one. This code is almost certainly not | |
864 | portable, and the user will get what they deserve if the C type | |
865 | across platforms isn't always interoperable with integer(4). If | |
866 | the user had used something like integer(c_int) or integer(c_long), | |
867 | the compiler could have automatically handled the varying sizes | |
868 | across platforms. */ | |
869 | ||
17b1d2a0 | 870 | gfc_try |
a8b3b0b6 CR |
871 | verify_c_interop_param (gfc_symbol *sym) |
872 | { | |
873 | int is_c_interop = 0; | |
17b1d2a0 | 874 | gfc_try retval = SUCCESS; |
a8b3b0b6 CR |
875 | |
876 | /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). | |
877 | Don't repeat the checks here. */ | |
878 | if (sym->attr.implicit_type) | |
879 | return SUCCESS; | |
880 | ||
881 | /* For subroutines or functions that are passed to a BIND(C) procedure, | |
882 | they're interoperable if they're BIND(C) and their params are all | |
883 | interoperable. */ | |
884 | if (sym->attr.flavor == FL_PROCEDURE) | |
885 | { | |
886 | if (sym->attr.is_bind_c == 0) | |
887 | { | |
888 | gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " | |
889 | "attribute to be C interoperable", sym->name, | |
890 | &(sym->declared_at)); | |
891 | ||
892 | return FAILURE; | |
893 | } | |
894 | else | |
895 | { | |
896 | if (sym->attr.is_c_interop == 1) | |
897 | /* We've already checked this procedure; don't check it again. */ | |
898 | return SUCCESS; | |
899 | else | |
900 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, | |
901 | sym->common_block); | |
902 | } | |
903 | } | |
904 | ||
905 | /* See if we've stored a reference to a procedure that owns sym. */ | |
906 | if (sym->ns != NULL && sym->ns->proc_name != NULL) | |
907 | { | |
908 | if (sym->ns->proc_name->attr.is_bind_c == 1) | |
909 | { | |
910 | is_c_interop = | |
911 | (verify_c_interop (&(sym->ts), sym->name, &(sym->declared_at)) | |
912 | == SUCCESS ? 1 : 0); | |
913 | ||
914 | if (is_c_interop != 1) | |
915 | { | |
916 | /* Make personalized messages to give better feedback. */ | |
917 | if (sym->ts.type == BT_DERIVED) | |
918 | gfc_error ("Type '%s' at %L is a parameter to the BIND(C) " | |
919 | " procedure '%s' but is not C interoperable " | |
920 | "because derived type '%s' is not C interoperable", | |
921 | sym->name, &(sym->declared_at), | |
922 | sym->ns->proc_name->name, | |
923 | sym->ts.derived->name); | |
924 | else | |
925 | gfc_warning ("Variable '%s' at %L is a parameter to the " | |
926 | "BIND(C) procedure '%s' but may not be C " | |
927 | "interoperable", | |
928 | sym->name, &(sym->declared_at), | |
929 | sym->ns->proc_name->name); | |
930 | } | |
aa5e22f0 CR |
931 | |
932 | /* Character strings are only C interoperable if they have a | |
933 | length of 1. */ | |
934 | if (sym->ts.type == BT_CHARACTER) | |
935 | { | |
936 | gfc_charlen *cl = sym->ts.cl; | |
937 | if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT | |
938 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) | |
939 | { | |
940 | gfc_error ("Character argument '%s' at %L " | |
941 | "must be length 1 because " | |
942 | "procedure '%s' is BIND(C)", | |
943 | sym->name, &sym->declared_at, | |
944 | sym->ns->proc_name->name); | |
945 | retval = FAILURE; | |
946 | } | |
947 | } | |
948 | ||
a8b3b0b6 CR |
949 | /* We have to make sure that any param to a bind(c) routine does |
950 | not have the allocatable, pointer, or optional attributes, | |
951 | according to J3/04-007, section 5.1. */ | |
952 | if (sym->attr.allocatable == 1) | |
953 | { | |
954 | gfc_error ("Variable '%s' at %L cannot have the " | |
955 | "ALLOCATABLE attribute because procedure '%s'" | |
956 | " is BIND(C)", sym->name, &(sym->declared_at), | |
957 | sym->ns->proc_name->name); | |
958 | retval = FAILURE; | |
959 | } | |
960 | ||
961 | if (sym->attr.pointer == 1) | |
962 | { | |
963 | gfc_error ("Variable '%s' at %L cannot have the " | |
964 | "POINTER attribute because procedure '%s'" | |
965 | " is BIND(C)", sym->name, &(sym->declared_at), | |
966 | sym->ns->proc_name->name); | |
967 | retval = FAILURE; | |
968 | } | |
969 | ||
970 | if (sym->attr.optional == 1) | |
971 | { | |
972 | gfc_error ("Variable '%s' at %L cannot have the " | |
973 | "OPTIONAL attribute because procedure '%s'" | |
974 | " is BIND(C)", sym->name, &(sym->declared_at), | |
975 | sym->ns->proc_name->name); | |
976 | retval = FAILURE; | |
977 | } | |
978 | ||
979 | /* Make sure that if it has the dimension attribute, that it is | |
980 | either assumed size or explicit shape. */ | |
981 | if (sym->as != NULL) | |
982 | { | |
983 | if (sym->as->type == AS_ASSUMED_SHAPE) | |
984 | { | |
985 | gfc_error ("Assumed-shape array '%s' at %L cannot be an " | |
986 | "argument to the procedure '%s' at %L because " | |
987 | "the procedure is BIND(C)", sym->name, | |
988 | &(sym->declared_at), sym->ns->proc_name->name, | |
989 | &(sym->ns->proc_name->declared_at)); | |
990 | retval = FAILURE; | |
991 | } | |
992 | ||
993 | if (sym->as->type == AS_DEFERRED) | |
994 | { | |
995 | gfc_error ("Deferred-shape array '%s' at %L cannot be an " | |
996 | "argument to the procedure '%s' at %L because " | |
997 | "the procedure is BIND(C)", sym->name, | |
998 | &(sym->declared_at), sym->ns->proc_name->name, | |
999 | &(sym->ns->proc_name->declared_at)); | |
1000 | retval = FAILURE; | |
1001 | } | |
1002 | } | |
1003 | } | |
1004 | } | |
1005 | ||
1006 | return retval; | |
1007 | } | |
1008 | ||
1009 | ||
1010 | /* Function called by variable_decl() that adds a name to the symbol table. */ | |
6de9cd9a | 1011 | |
17b1d2a0 | 1012 | static gfc_try |
636dff67 SK |
1013 | build_sym (const char *name, gfc_charlen *cl, |
1014 | gfc_array_spec **as, locus *var_locus) | |
6de9cd9a DN |
1015 | { |
1016 | symbol_attribute attr; | |
1017 | gfc_symbol *sym; | |
1018 | ||
9e35b386 | 1019 | if (gfc_get_symbol (name, NULL, &sym)) |
6de9cd9a DN |
1020 | return FAILURE; |
1021 | ||
66e4ab31 | 1022 | /* Start updating the symbol table. Add basic type attribute if present. */ |
6de9cd9a | 1023 | if (current_ts.type != BT_UNKNOWN |
636dff67 SK |
1024 | && (sym->attr.implicit_type == 0 |
1025 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
6de9cd9a DN |
1026 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
1027 | return FAILURE; | |
1028 | ||
1029 | if (sym->ts.type == BT_CHARACTER) | |
1030 | sym->ts.cl = cl; | |
1031 | ||
1032 | /* Add dimension attribute if present. */ | |
1033 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
1034 | return FAILURE; | |
1035 | *as = NULL; | |
1036 | ||
1037 | /* Add attribute to symbol. The copy is so that we can reset the | |
1038 | dimension attribute. */ | |
1039 | attr = current_attr; | |
1040 | attr.dimension = 0; | |
1041 | ||
1042 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
1043 | return FAILURE; | |
1044 | ||
a8b3b0b6 CR |
1045 | /* Finish any work that may need to be done for the binding label, |
1046 | if it's a bind(c). The bind(c) attr is found before the symbol | |
1047 | is made, and before the symbol name (for data decls), so the | |
1048 | current_ts is holding the binding label, or nothing if the | |
1049 | name= attr wasn't given. Therefore, test here if we're dealing | |
1050 | with a bind(c) and make sure the binding label is set correctly. */ | |
1051 | if (sym->attr.is_bind_c == 1) | |
1052 | { | |
1053 | if (sym->binding_label[0] == '\0') | |
1054 | { | |
ad4a2f64 TB |
1055 | /* Set the binding label and verify that if a NAME= was specified |
1056 | then only one identifier was in the entity-decl-list. */ | |
1057 | if (set_binding_label (sym->binding_label, sym->name, | |
1058 | num_idents_on_line) == FAILURE) | |
a8b3b0b6 CR |
1059 | return FAILURE; |
1060 | } | |
1061 | } | |
1062 | ||
1063 | /* See if we know we're in a common block, and if it's a bind(c) | |
1064 | common then we need to make sure we're an interoperable type. */ | |
1065 | if (sym->attr.in_common == 1) | |
1066 | { | |
1067 | /* Test the common block object. */ | |
1068 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 | |
1069 | && sym->ts.is_c_interop != 1) | |
1070 | { | |
1071 | gfc_error_now ("Variable '%s' in common block '%s' at %C " | |
1072 | "must be declared with a C interoperable " | |
1073 | "kind since common block '%s' is BIND(C)", | |
1074 | sym->name, sym->common_block->name, | |
1075 | sym->common_block->name); | |
1076 | gfc_clear_error (); | |
1077 | } | |
1078 | } | |
1079 | ||
9a3db5a3 PT |
1080 | sym->attr.implied_index = 0; |
1081 | ||
6de9cd9a DN |
1082 | return SUCCESS; |
1083 | } | |
1084 | ||
636dff67 | 1085 | |
df7cc9b5 | 1086 | /* Set character constant to the given length. The constant will be padded or |
d2848082 DK |
1087 | truncated. If we're inside an array constructor without a typespec, we |
1088 | additionally check that all elements have the same length; check_len -1 | |
1089 | means no checking. */ | |
df7cc9b5 FW |
1090 | |
1091 | void | |
d2848082 | 1092 | gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len) |
df7cc9b5 | 1093 | { |
00660189 | 1094 | gfc_char_t *s; |
df7cc9b5 FW |
1095 | int slen; |
1096 | ||
1097 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
d393bbd7 | 1098 | gcc_assert (expr->ts.type == BT_CHARACTER); |
df7cc9b5 FW |
1099 | |
1100 | slen = expr->value.character.length; | |
1101 | if (len != slen) | |
1102 | { | |
00660189 FXC |
1103 | s = gfc_get_wide_string (len + 1); |
1104 | memcpy (s, expr->value.character.string, | |
1105 | MIN (len, slen) * sizeof (gfc_char_t)); | |
df7cc9b5 | 1106 | if (len > slen) |
00660189 | 1107 | gfc_wide_memset (&s[slen], ' ', len - slen); |
2220652d PT |
1108 | |
1109 | if (gfc_option.warn_character_truncation && slen > len) | |
1110 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
1111 | "(%d/%d)", &expr->where, slen, len); | |
1112 | ||
1113 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
1114 | initializers. */ | |
d2848082 DK |
1115 | if (check_len != -1 && slen != check_len |
1116 | && !(gfc_option.allow_std & GFC_STD_GNU)) | |
2220652d PT |
1117 | gfc_error_now ("The CHARACTER elements of the array constructor " |
1118 | "at %L must have the same length (%d/%d)", | |
d2848082 | 1119 | &expr->where, slen, check_len); |
2220652d | 1120 | |
150675a8 | 1121 | s[len] = '\0'; |
df7cc9b5 FW |
1122 | gfc_free (expr->value.character.string); |
1123 | expr->value.character.string = s; | |
1124 | expr->value.character.length = len; | |
1125 | } | |
1126 | } | |
6de9cd9a | 1127 | |
25d8f0a2 | 1128 | |
d51347f9 | 1129 | /* Function to create and update the enumerator history |
25d8f0a2 | 1130 | using the information passed as arguments. |
d51347f9 TB |
1131 | Pointer "max_enum" is also updated, to point to |
1132 | enum history node containing largest initializer. | |
25d8f0a2 TS |
1133 | |
1134 | SYM points to the symbol node of enumerator. | |
66e4ab31 | 1135 | INIT points to its enumerator value. */ |
25d8f0a2 | 1136 | |
d51347f9 | 1137 | static void |
636dff67 | 1138 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
25d8f0a2 TS |
1139 | { |
1140 | enumerator_history *new_enum_history; | |
1141 | gcc_assert (sym != NULL && init != NULL); | |
1142 | ||
ece3f663 | 1143 | new_enum_history = XCNEW (enumerator_history); |
25d8f0a2 TS |
1144 | |
1145 | new_enum_history->sym = sym; | |
1146 | new_enum_history->initializer = init; | |
1147 | new_enum_history->next = NULL; | |
1148 | ||
1149 | if (enum_history == NULL) | |
1150 | { | |
1151 | enum_history = new_enum_history; | |
1152 | max_enum = enum_history; | |
1153 | } | |
1154 | else | |
1155 | { | |
1156 | new_enum_history->next = enum_history; | |
1157 | enum_history = new_enum_history; | |
1158 | ||
d51347f9 | 1159 | if (mpz_cmp (max_enum->initializer->value.integer, |
25d8f0a2 | 1160 | new_enum_history->initializer->value.integer) < 0) |
636dff67 | 1161 | max_enum = new_enum_history; |
25d8f0a2 TS |
1162 | } |
1163 | } | |
1164 | ||
1165 | ||
d51347f9 | 1166 | /* Function to free enum kind history. */ |
25d8f0a2 | 1167 | |
d51347f9 | 1168 | void |
636dff67 | 1169 | gfc_free_enum_history (void) |
25d8f0a2 | 1170 | { |
d51347f9 TB |
1171 | enumerator_history *current = enum_history; |
1172 | enumerator_history *next; | |
25d8f0a2 TS |
1173 | |
1174 | while (current != NULL) | |
1175 | { | |
1176 | next = current->next; | |
1177 | gfc_free (current); | |
1178 | current = next; | |
1179 | } | |
1180 | max_enum = NULL; | |
1181 | enum_history = NULL; | |
1182 | } | |
1183 | ||
1184 | ||
6de9cd9a DN |
1185 | /* Function called by variable_decl() that adds an initialization |
1186 | expression to a symbol. */ | |
1187 | ||
17b1d2a0 | 1188 | static gfc_try |
66e4ab31 | 1189 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) |
6de9cd9a DN |
1190 | { |
1191 | symbol_attribute attr; | |
1192 | gfc_symbol *sym; | |
1193 | gfc_expr *init; | |
1194 | ||
1195 | init = *initp; | |
1196 | if (find_special (name, &sym)) | |
1197 | return FAILURE; | |
1198 | ||
1199 | attr = sym->attr; | |
1200 | ||
1201 | /* If this symbol is confirming an implicit parameter type, | |
1202 | then an initialization expression is not allowed. */ | |
1203 | if (attr.flavor == FL_PARAMETER | |
1204 | && sym->value != NULL | |
1205 | && *initp != NULL) | |
1206 | { | |
1207 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
1208 | sym->name); | |
1209 | return FAILURE; | |
1210 | } | |
1211 | ||
1212 | if (init == NULL) | |
1213 | { | |
1214 | /* An initializer is required for PARAMETER declarations. */ | |
1215 | if (attr.flavor == FL_PARAMETER) | |
1216 | { | |
1217 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
1218 | return FAILURE; | |
1219 | } | |
1220 | } | |
1221 | else | |
1222 | { | |
1223 | /* If a variable appears in a DATA block, it cannot have an | |
1de8a836 | 1224 | initializer. */ |
6de9cd9a DN |
1225 | if (sym->attr.data) |
1226 | { | |
636dff67 SK |
1227 | gfc_error ("Variable '%s' at %C with an initializer already " |
1228 | "appears in a DATA statement", sym->name); | |
6de9cd9a DN |
1229 | return FAILURE; |
1230 | } | |
1231 | ||
75d17889 TS |
1232 | /* Check if the assignment can happen. This has to be put off |
1233 | until later for a derived type variable. */ | |
6de9cd9a DN |
1234 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
1235 | && gfc_check_assign_symbol (sym, init) == FAILURE) | |
1236 | return FAILURE; | |
1237 | ||
df7cc9b5 FW |
1238 | if (sym->ts.type == BT_CHARACTER && sym->ts.cl) |
1239 | { | |
1240 | /* Update symbol character length according initializer. */ | |
1241 | if (sym->ts.cl->length == NULL) | |
1242 | { | |
a99288e5 | 1243 | int clen; |
66e4ab31 SK |
1244 | /* If there are multiple CHARACTER variables declared on the |
1245 | same line, we don't want them to share the same length. */ | |
4213f93b PT |
1246 | sym->ts.cl = gfc_get_charlen (); |
1247 | sym->ts.cl->next = gfc_current_ns->cl_list; | |
1248 | gfc_current_ns->cl_list = sym->ts.cl; | |
96f4873b | 1249 | |
a99288e5 PT |
1250 | if (sym->attr.flavor == FL_PARAMETER) |
1251 | { | |
1252 | if (init->expr_type == EXPR_CONSTANT) | |
1253 | { | |
1254 | clen = init->value.character.length; | |
1255 | sym->ts.cl->length = gfc_int_expr (clen); | |
1256 | } | |
1257 | else if (init->expr_type == EXPR_ARRAY) | |
1258 | { | |
1259 | gfc_expr *p = init->value.constructor->expr; | |
1260 | clen = p->value.character.length; | |
1261 | sym->ts.cl->length = gfc_int_expr (clen); | |
1262 | } | |
1263 | else if (init->ts.cl && init->ts.cl->length) | |
1264 | sym->ts.cl->length = | |
1265 | gfc_copy_expr (sym->value->ts.cl->length); | |
1266 | } | |
df7cc9b5 FW |
1267 | } |
1268 | /* Update initializer character length according symbol. */ | |
1269 | else if (sym->ts.cl->length->expr_type == EXPR_CONSTANT) | |
1270 | { | |
1271 | int len = mpz_get_si (sym->ts.cl->length->value.integer); | |
1272 | gfc_constructor * p; | |
1273 | ||
1274 | if (init->expr_type == EXPR_CONSTANT) | |
d2848082 | 1275 | gfc_set_constant_character_len (len, init, -1); |
df7cc9b5 FW |
1276 | else if (init->expr_type == EXPR_ARRAY) |
1277 | { | |
dcdc7b6c PT |
1278 | /* Build a new charlen to prevent simplification from |
1279 | deleting the length before it is resolved. */ | |
1280 | init->ts.cl = gfc_get_charlen (); | |
1281 | init->ts.cl->next = gfc_current_ns->cl_list; | |
1282 | gfc_current_ns->cl_list = sym->ts.cl; | |
df7cc9b5 | 1283 | init->ts.cl->length = gfc_copy_expr (sym->ts.cl->length); |
dcdc7b6c | 1284 | |
df7cc9b5 | 1285 | for (p = init->value.constructor; p; p = p->next) |
d2848082 | 1286 | gfc_set_constant_character_len (len, p->expr, -1); |
df7cc9b5 FW |
1287 | } |
1288 | } | |
1289 | } | |
1290 | ||
a8b3b0b6 CR |
1291 | /* Need to check if the expression we initialized this |
1292 | to was one of the iso_c_binding named constants. If so, | |
1293 | and we're a parameter (constant), let it be iso_c. | |
1294 | For example: | |
1295 | integer(c_int), parameter :: my_int = c_int | |
1296 | integer(my_int) :: my_int_2 | |
1297 | If we mark my_int as iso_c (since we can see it's value | |
1298 | is equal to one of the named constants), then my_int_2 | |
1299 | will be considered C interoperable. */ | |
1300 | if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) | |
1301 | { | |
1302 | sym->ts.is_iso_c |= init->ts.is_iso_c; | |
1303 | sym->ts.is_c_interop |= init->ts.is_c_interop; | |
1304 | /* attr bits needed for module files. */ | |
1305 | sym->attr.is_iso_c |= init->ts.is_iso_c; | |
1306 | sym->attr.is_c_interop |= init->ts.is_c_interop; | |
1307 | if (init->ts.is_iso_c) | |
1308 | sym->ts.f90_type = init->ts.f90_type; | |
1309 | } | |
1310 | ||
6de9cd9a DN |
1311 | /* Add initializer. Make sure we keep the ranks sane. */ |
1312 | if (sym->attr.dimension && init->rank == 0) | |
a9b43781 PT |
1313 | { |
1314 | mpz_t size; | |
1315 | gfc_expr *array; | |
1316 | gfc_constructor *c; | |
1317 | int n; | |
1318 | if (sym->attr.flavor == FL_PARAMETER | |
1319 | && init->expr_type == EXPR_CONSTANT | |
1320 | && spec_size (sym->as, &size) == SUCCESS | |
1321 | && mpz_cmp_si (size, 0) > 0) | |
1322 | { | |
1323 | array = gfc_start_constructor (init->ts.type, init->ts.kind, | |
1324 | &init->where); | |
1325 | ||
1326 | array->value.constructor = c = NULL; | |
1327 | for (n = 0; n < (int)mpz_get_si (size); n++) | |
1328 | { | |
1329 | if (array->value.constructor == NULL) | |
1330 | { | |
1331 | array->value.constructor = c = gfc_get_constructor (); | |
1332 | c->expr = init; | |
1333 | } | |
1334 | else | |
1335 | { | |
1336 | c->next = gfc_get_constructor (); | |
1337 | c = c->next; | |
1338 | c->expr = gfc_copy_expr (init); | |
1339 | } | |
1340 | } | |
1341 | ||
1342 | array->shape = gfc_get_shape (sym->as->rank); | |
1343 | for (n = 0; n < sym->as->rank; n++) | |
1344 | spec_dimen_size (sym->as, n, &array->shape[n]); | |
1345 | ||
1346 | init = array; | |
1347 | mpz_clear (size); | |
1348 | } | |
1349 | init->rank = sym->as->rank; | |
1350 | } | |
6de9cd9a DN |
1351 | |
1352 | sym->value = init; | |
ef7236d2 DF |
1353 | if (sym->attr.save == SAVE_NONE) |
1354 | sym->attr.save = SAVE_IMPLICIT; | |
6de9cd9a DN |
1355 | *initp = NULL; |
1356 | } | |
1357 | ||
1358 | return SUCCESS; | |
1359 | } | |
1360 | ||
1361 | ||
1362 | /* Function called by variable_decl() that adds a name to a structure | |
1363 | being built. */ | |
1364 | ||
17b1d2a0 | 1365 | static gfc_try |
636dff67 SK |
1366 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
1367 | gfc_array_spec **as) | |
6de9cd9a DN |
1368 | { |
1369 | gfc_component *c; | |
1370 | ||
1371 | /* If the current symbol is of the same derived type that we're | |
1372 | constructing, it must have the pointer attribute. */ | |
1373 | if (current_ts.type == BT_DERIVED | |
1374 | && current_ts.derived == gfc_current_block () | |
1375 | && current_attr.pointer == 0) | |
1376 | { | |
1377 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1378 | return FAILURE; | |
1379 | } | |
1380 | ||
636dff67 | 1381 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
6de9cd9a DN |
1382 | { |
1383 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1384 | { | |
1385 | gfc_error ("Array component of structure at %C must have explicit " | |
1386 | "or deferred shape"); | |
1387 | return FAILURE; | |
1388 | } | |
1389 | } | |
1390 | ||
1391 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1392 | return FAILURE; | |
1393 | ||
1394 | c->ts = current_ts; | |
1395 | c->ts.cl = cl; | |
1396 | gfc_set_component_attr (c, ¤t_attr); | |
1397 | ||
1398 | c->initializer = *init; | |
1399 | *init = NULL; | |
1400 | ||
1401 | c->as = *as; | |
1402 | if (c->as != NULL) | |
1403 | c->dimension = 1; | |
1404 | *as = NULL; | |
1405 | ||
28d08315 PT |
1406 | /* Should this ever get more complicated, combine with similar section |
1407 | in add_init_expr_to_sym into a separate function. */ | |
d2848082 DK |
1408 | if (c->ts.type == BT_CHARACTER && !c->pointer && c->initializer && c->ts.cl |
1409 | && c->ts.cl->length && c->ts.cl->length->expr_type == EXPR_CONSTANT) | |
28d08315 | 1410 | { |
d2848082 DK |
1411 | int len; |
1412 | ||
1413 | gcc_assert (c->ts.cl && c->ts.cl->length); | |
1414 | gcc_assert (c->ts.cl->length->expr_type == EXPR_CONSTANT); | |
1415 | gcc_assert (c->ts.cl->length->ts.type == BT_INTEGER); | |
1416 | ||
1417 | len = mpz_get_si (c->ts.cl->length->value.integer); | |
28d08315 PT |
1418 | |
1419 | if (c->initializer->expr_type == EXPR_CONSTANT) | |
d2848082 | 1420 | gfc_set_constant_character_len (len, c->initializer, -1); |
28d08315 PT |
1421 | else if (mpz_cmp (c->ts.cl->length->value.integer, |
1422 | c->initializer->ts.cl->length->value.integer)) | |
1423 | { | |
d2848082 | 1424 | bool has_ts; |
28d08315 | 1425 | gfc_constructor *ctor = c->initializer->value.constructor; |
d2848082 DK |
1426 | |
1427 | bool first = true; | |
1428 | int first_len; | |
1429 | ||
1430 | has_ts = (c->initializer->ts.cl | |
1431 | && c->initializer->ts.cl->length_from_typespec); | |
1432 | ||
1433 | for (; ctor; ctor = ctor->next) | |
1434 | { | |
1435 | /* Remember the length of the first element for checking that | |
1436 | all elements *in the constructor* have the same length. This | |
1437 | need not be the length of the LHS! */ | |
1438 | if (first) | |
1439 | { | |
1440 | gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT); | |
1441 | gcc_assert (ctor->expr->ts.type == BT_CHARACTER); | |
1442 | first_len = ctor->expr->value.character.length; | |
1443 | first = false; | |
1444 | } | |
1445 | ||
1446 | if (ctor->expr->expr_type == EXPR_CONSTANT) | |
1447 | gfc_set_constant_character_len (len, ctor->expr, | |
1448 | has_ts ? -1 : first_len); | |
1449 | } | |
28d08315 PT |
1450 | } |
1451 | } | |
1452 | ||
6de9cd9a DN |
1453 | /* Check array components. */ |
1454 | if (!c->dimension) | |
5046aff5 PT |
1455 | { |
1456 | if (c->allocatable) | |
1457 | { | |
1458 | gfc_error ("Allocatable component at %C must be an array"); | |
1459 | return FAILURE; | |
1460 | } | |
1461 | else | |
1462 | return SUCCESS; | |
1463 | } | |
6de9cd9a DN |
1464 | |
1465 | if (c->pointer) | |
1466 | { | |
1467 | if (c->as->type != AS_DEFERRED) | |
1468 | { | |
5046aff5 PT |
1469 | gfc_error ("Pointer array component of structure at %C must have a " |
1470 | "deferred shape"); | |
1471 | return FAILURE; | |
1472 | } | |
1473 | } | |
1474 | else if (c->allocatable) | |
1475 | { | |
1476 | if (c->as->type != AS_DEFERRED) | |
1477 | { | |
1478 | gfc_error ("Allocatable component of structure at %C must have a " | |
1479 | "deferred shape"); | |
6de9cd9a DN |
1480 | return FAILURE; |
1481 | } | |
1482 | } | |
1483 | else | |
1484 | { | |
1485 | if (c->as->type != AS_EXPLICIT) | |
1486 | { | |
636dff67 SK |
1487 | gfc_error ("Array component of structure at %C must have an " |
1488 | "explicit shape"); | |
6de9cd9a DN |
1489 | return FAILURE; |
1490 | } | |
1491 | } | |
1492 | ||
1493 | return SUCCESS; | |
1494 | } | |
1495 | ||
1496 | ||
1497 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1498 | ||
1499 | match | |
636dff67 | 1500 | gfc_match_null (gfc_expr **result) |
6de9cd9a DN |
1501 | { |
1502 | gfc_symbol *sym; | |
1503 | gfc_expr *e; | |
1504 | match m; | |
1505 | ||
1506 | m = gfc_match (" null ( )"); | |
1507 | if (m != MATCH_YES) | |
1508 | return m; | |
1509 | ||
1510 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1511 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1512 | { | |
1513 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1514 | return MATCH_ERROR; | |
1515 | } | |
1516 | ||
1517 | gfc_intrinsic_symbol (sym); | |
1518 | ||
1519 | if (sym->attr.proc != PROC_INTRINSIC | |
231b2fcc TS |
1520 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1521 | sym->name, NULL) == FAILURE | |
1522 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
6de9cd9a DN |
1523 | return MATCH_ERROR; |
1524 | ||
1525 | e = gfc_get_expr (); | |
63645982 | 1526 | e->where = gfc_current_locus; |
6de9cd9a DN |
1527 | e->expr_type = EXPR_NULL; |
1528 | e->ts.type = BT_UNKNOWN; | |
1529 | ||
1530 | *result = e; | |
1531 | ||
1532 | return MATCH_YES; | |
1533 | } | |
1534 | ||
1535 | ||
6de9cd9a DN |
1536 | /* Match a variable name with an optional initializer. When this |
1537 | subroutine is called, a variable is expected to be parsed next. | |
1538 | Depending on what is happening at the moment, updates either the | |
1539 | symbol table or the current interface. */ | |
1540 | ||
1541 | static match | |
949d5b72 | 1542 | variable_decl (int elem) |
6de9cd9a DN |
1543 | { |
1544 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1545 | gfc_expr *initializer, *char_len; | |
1546 | gfc_array_spec *as; | |
83d890b9 | 1547 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
6de9cd9a DN |
1548 | gfc_charlen *cl; |
1549 | locus var_locus; | |
1550 | match m; | |
17b1d2a0 | 1551 | gfc_try t; |
83d890b9 | 1552 | gfc_symbol *sym; |
25d8f0a2 | 1553 | locus old_locus; |
6de9cd9a DN |
1554 | |
1555 | initializer = NULL; | |
1556 | as = NULL; | |
83d890b9 | 1557 | cp_as = NULL; |
25d8f0a2 | 1558 | old_locus = gfc_current_locus; |
6de9cd9a DN |
1559 | |
1560 | /* When we get here, we've just matched a list of attributes and | |
1561 | maybe a type and a double colon. The next thing we expect to see | |
1562 | is the name of the symbol. */ | |
1563 | m = gfc_match_name (name); | |
1564 | if (m != MATCH_YES) | |
1565 | goto cleanup; | |
1566 | ||
63645982 | 1567 | var_locus = gfc_current_locus; |
6de9cd9a DN |
1568 | |
1569 | /* Now we could see the optional array spec. or character length. */ | |
1570 | m = gfc_match_array_spec (&as); | |
83d890b9 AL |
1571 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1572 | cp_as = gfc_copy_array_spec (as); | |
1573 | else if (m == MATCH_ERROR) | |
6de9cd9a | 1574 | goto cleanup; |
25d8f0a2 | 1575 | |
6de9cd9a DN |
1576 | if (m == MATCH_NO) |
1577 | as = gfc_copy_array_spec (current_as); | |
1578 | ||
1579 | char_len = NULL; | |
1580 | cl = NULL; | |
1581 | ||
1582 | if (current_ts.type == BT_CHARACTER) | |
1583 | { | |
1584 | switch (match_char_length (&char_len)) | |
1585 | { | |
1586 | case MATCH_YES: | |
1587 | cl = gfc_get_charlen (); | |
1588 | cl->next = gfc_current_ns->cl_list; | |
1589 | gfc_current_ns->cl_list = cl; | |
1590 | ||
1591 | cl->length = char_len; | |
1592 | break; | |
1593 | ||
949d5b72 | 1594 | /* Non-constant lengths need to be copied after the first |
9b21a380 | 1595 | element. Also copy assumed lengths. */ |
6de9cd9a | 1596 | case MATCH_NO: |
9b21a380 JJ |
1597 | if (elem > 1 |
1598 | && (current_ts.cl->length == NULL | |
1599 | || current_ts.cl->length->expr_type != EXPR_CONSTANT)) | |
949d5b72 PT |
1600 | { |
1601 | cl = gfc_get_charlen (); | |
1602 | cl->next = gfc_current_ns->cl_list; | |
1603 | gfc_current_ns->cl_list = cl; | |
1604 | cl->length = gfc_copy_expr (current_ts.cl->length); | |
1605 | } | |
1606 | else | |
1607 | cl = current_ts.cl; | |
1608 | ||
6de9cd9a DN |
1609 | break; |
1610 | ||
1611 | case MATCH_ERROR: | |
1612 | goto cleanup; | |
1613 | } | |
1614 | } | |
1615 | ||
83d890b9 | 1616 | /* If this symbol has already shown up in a Cray Pointer declaration, |
66e4ab31 | 1617 | then we want to set the type & bail out. */ |
83d890b9 AL |
1618 | if (gfc_option.flag_cray_pointer) |
1619 | { | |
1620 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1621 | if (sym != NULL && sym->attr.cray_pointee) | |
1622 | { | |
1623 | sym->ts.type = current_ts.type; | |
1624 | sym->ts.kind = current_ts.kind; | |
1625 | sym->ts.cl = cl; | |
1626 | sym->ts.derived = current_ts.derived; | |
a8b3b0b6 CR |
1627 | sym->ts.is_c_interop = current_ts.is_c_interop; |
1628 | sym->ts.is_iso_c = current_ts.is_iso_c; | |
83d890b9 AL |
1629 | m = MATCH_YES; |
1630 | ||
1631 | /* Check to see if we have an array specification. */ | |
1632 | if (cp_as != NULL) | |
1633 | { | |
1634 | if (sym->as != NULL) | |
1635 | { | |
e25a0da3 | 1636 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
83d890b9 AL |
1637 | gfc_free_array_spec (cp_as); |
1638 | m = MATCH_ERROR; | |
1639 | goto cleanup; | |
1640 | } | |
1641 | else | |
1642 | { | |
1643 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1644 | gfc_internal_error ("Couldn't set pointee array spec."); | |
d51347f9 | 1645 | |
83d890b9 | 1646 | /* Fix the array spec. */ |
d51347f9 | 1647 | m = gfc_mod_pointee_as (sym->as); |
83d890b9 AL |
1648 | if (m == MATCH_ERROR) |
1649 | goto cleanup; | |
1650 | } | |
d51347f9 | 1651 | } |
83d890b9 AL |
1652 | goto cleanup; |
1653 | } | |
1654 | else | |
1655 | { | |
1656 | gfc_free_array_spec (cp_as); | |
1657 | } | |
1658 | } | |
d51347f9 TB |
1659 | |
1660 | ||
6de9cd9a DN |
1661 | /* OK, we've successfully matched the declaration. Now put the |
1662 | symbol in the current namespace, because it might be used in the | |
69de3b83 | 1663 | optional initialization expression for this symbol, e.g. this is |
6de9cd9a DN |
1664 | perfectly legal: |
1665 | ||
1666 | integer, parameter :: i = huge(i) | |
1667 | ||
1668 | This is only true for parameters or variables of a basic type. | |
1669 | For components of derived types, it is not true, so we don't | |
1670 | create a symbol for those yet. If we fail to create the symbol, | |
1671 | bail out. */ | |
1672 | if (gfc_current_state () != COMP_DERIVED | |
1673 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1674 | { | |
72af9f0b PT |
1675 | m = MATCH_ERROR; |
1676 | goto cleanup; | |
1677 | } | |
1678 | ||
6133c68a TS |
1679 | /* An interface body specifies all of the procedure's |
1680 | characteristics and these shall be consistent with those | |
1681 | specified in the procedure definition, except that the interface | |
1682 | may specify a procedure that is not pure if the procedure is | |
1683 | defined to be pure(12.3.2). */ | |
72af9f0b | 1684 | if (current_ts.type == BT_DERIVED |
636dff67 SK |
1685 | && gfc_current_ns->proc_name |
1686 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
5a8af0b4 PT |
1687 | && current_ts.derived->ns != gfc_current_ns) |
1688 | { | |
1689 | gfc_symtree *st; | |
1690 | st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.derived->name); | |
1691 | if (!(current_ts.derived->attr.imported | |
1692 | && st != NULL | |
1693 | && st->n.sym == current_ts.derived) | |
1694 | && !gfc_current_ns->has_import_set) | |
1695 | { | |
1696 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1697 | "interface", name); | |
1698 | m = MATCH_ERROR; | |
1699 | goto cleanup; | |
1700 | } | |
6de9cd9a DN |
1701 | } |
1702 | ||
1703 | /* In functions that have a RESULT variable defined, the function | |
1704 | name always refers to function calls. Therefore, the name is | |
1705 | not allowed to appear in specification statements. */ | |
1706 | if (gfc_current_state () == COMP_FUNCTION | |
1707 | && gfc_current_block () != NULL | |
1708 | && gfc_current_block ()->result != NULL | |
1709 | && gfc_current_block ()->result != gfc_current_block () | |
1710 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1711 | { | |
1712 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1713 | m = MATCH_ERROR; | |
1714 | goto cleanup; | |
1715 | } | |
1716 | ||
294fbfc8 TS |
1717 | /* We allow old-style initializations of the form |
1718 | integer i /2/, j(4) /3*3, 1/ | |
1719 | (if no colon has been seen). These are different from data | |
1720 | statements in that initializers are only allowed to apply to the | |
1721 | variable immediately preceding, i.e. | |
1722 | integer i, j /1, 2/ | |
1723 | is not allowed. Therefore we have to do some work manually, that | |
75d17889 | 1724 | could otherwise be left to the matchers for DATA statements. */ |
294fbfc8 TS |
1725 | |
1726 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1727 | { | |
1728 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1729 | "initialization at %C") == FAILURE) | |
1730 | return MATCH_ERROR; | |
d51347f9 | 1731 | |
294fbfc8 TS |
1732 | return match_old_style_init (name); |
1733 | } | |
1734 | ||
6de9cd9a DN |
1735 | /* The double colon must be present in order to have initializers. |
1736 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1737 | if (colon_seen) | |
1738 | { | |
1739 | if (gfc_match (" =>") == MATCH_YES) | |
1740 | { | |
6de9cd9a DN |
1741 | if (!current_attr.pointer) |
1742 | { | |
1743 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1744 | m = MATCH_ERROR; | |
1745 | goto cleanup; | |
1746 | } | |
1747 | ||
1748 | m = gfc_match_null (&initializer); | |
1749 | if (m == MATCH_NO) | |
1750 | { | |
def66134 | 1751 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
6de9cd9a DN |
1752 | m = MATCH_ERROR; |
1753 | } | |
1754 | ||
1755 | if (gfc_pure (NULL)) | |
1756 | { | |
636dff67 SK |
1757 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1758 | "a PURE procedure"); | |
6de9cd9a DN |
1759 | m = MATCH_ERROR; |
1760 | } | |
1761 | ||
1762 | if (m != MATCH_YES) | |
1763 | goto cleanup; | |
1764 | ||
6de9cd9a DN |
1765 | } |
1766 | else if (gfc_match_char ('=') == MATCH_YES) | |
1767 | { | |
1768 | if (current_attr.pointer) | |
1769 | { | |
636dff67 SK |
1770 | gfc_error ("Pointer initialization at %C requires '=>', " |
1771 | "not '='"); | |
6de9cd9a DN |
1772 | m = MATCH_ERROR; |
1773 | goto cleanup; | |
1774 | } | |
1775 | ||
1776 | m = gfc_match_init_expr (&initializer); | |
1777 | if (m == MATCH_NO) | |
1778 | { | |
1779 | gfc_error ("Expected an initialization expression at %C"); | |
1780 | m = MATCH_ERROR; | |
1781 | } | |
1782 | ||
1783 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL)) | |
1784 | { | |
636dff67 SK |
1785 | gfc_error ("Initialization of variable at %C is not allowed in " |
1786 | "a PURE procedure"); | |
6de9cd9a DN |
1787 | m = MATCH_ERROR; |
1788 | } | |
1789 | ||
1790 | if (m != MATCH_YES) | |
1791 | goto cleanup; | |
1792 | } | |
cb44ab82 VL |
1793 | } |
1794 | ||
5046aff5 PT |
1795 | if (initializer != NULL && current_attr.allocatable |
1796 | && gfc_current_state () == COMP_DERIVED) | |
1797 | { | |
636dff67 SK |
1798 | gfc_error ("Initialization of allocatable component at %C is not " |
1799 | "allowed"); | |
5046aff5 PT |
1800 | m = MATCH_ERROR; |
1801 | goto cleanup; | |
1802 | } | |
1803 | ||
54b4ba60 | 1804 | /* Add the initializer. Note that it is fine if initializer is |
6de9cd9a DN |
1805 | NULL here, because we sometimes also need to check if a |
1806 | declaration *must* have an initialization expression. */ | |
1807 | if (gfc_current_state () != COMP_DERIVED) | |
1808 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1809 | else | |
54b4ba60 | 1810 | { |
5046aff5 | 1811 | if (current_ts.type == BT_DERIVED |
636dff67 | 1812 | && !current_attr.pointer && !initializer) |
54b4ba60 PB |
1813 | initializer = gfc_default_initializer (¤t_ts); |
1814 | t = build_struct (name, cl, &initializer, &as); | |
1815 | } | |
6de9cd9a DN |
1816 | |
1817 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1818 | ||
1819 | cleanup: | |
1820 | /* Free stuff up and return. */ | |
1821 | gfc_free_expr (initializer); | |
1822 | gfc_free_array_spec (as); | |
1823 | ||
1824 | return m; | |
1825 | } | |
1826 | ||
1827 | ||
b2b81a3f BM |
1828 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
1829 | This assumes that the byte size is equal to the kind number for | |
1830 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
6de9cd9a DN |
1831 | |
1832 | match | |
636dff67 | 1833 | gfc_match_old_kind_spec (gfc_typespec *ts) |
6de9cd9a DN |
1834 | { |
1835 | match m; | |
5cf54585 | 1836 | int original_kind; |
6de9cd9a DN |
1837 | |
1838 | if (gfc_match_char ('*') != MATCH_YES) | |
1839 | return MATCH_NO; | |
1840 | ||
5cf54585 | 1841 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
6de9cd9a DN |
1842 | if (m != MATCH_YES) |
1843 | return MATCH_ERROR; | |
1844 | ||
e45b3c75 ES |
1845 | original_kind = ts->kind; |
1846 | ||
6de9cd9a | 1847 | /* Massage the kind numbers for complex types. */ |
e45b3c75 ES |
1848 | if (ts->type == BT_COMPLEX) |
1849 | { | |
1850 | if (ts->kind % 2) | |
636dff67 SK |
1851 | { |
1852 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1853 | gfc_basic_typename (ts->type), original_kind); | |
1854 | return MATCH_ERROR; | |
1855 | } | |
e45b3c75 ES |
1856 | ts->kind /= 2; |
1857 | } | |
6de9cd9a | 1858 | |
e7a2d5fb | 1859 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a | 1860 | { |
e45b3c75 | 1861 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
636dff67 | 1862 | gfc_basic_typename (ts->type), original_kind); |
6de9cd9a DN |
1863 | return MATCH_ERROR; |
1864 | } | |
1865 | ||
df8652dc SK |
1866 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
1867 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1868 | return MATCH_ERROR; | |
1869 | ||
6de9cd9a DN |
1870 | return MATCH_YES; |
1871 | } | |
1872 | ||
1873 | ||
1874 | /* Match a kind specification. Since kinds are generally optional, we | |
1875 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1876 | string is found, then we know we have an error. */ | |
1877 | ||
1878 | match | |
e2d29968 | 1879 | gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only) |
6de9cd9a | 1880 | { |
e2d29968 | 1881 | locus where, loc; |
6de9cd9a DN |
1882 | gfc_expr *e; |
1883 | match m, n; | |
96ee3a4a | 1884 | char c; |
6de9cd9a DN |
1885 | const char *msg; |
1886 | ||
1887 | m = MATCH_NO; | |
e2d29968 | 1888 | n = MATCH_YES; |
6de9cd9a DN |
1889 | e = NULL; |
1890 | ||
e2d29968 PT |
1891 | where = loc = gfc_current_locus; |
1892 | ||
1893 | if (kind_expr_only) | |
1894 | goto kind_expr; | |
6de9cd9a DN |
1895 | |
1896 | if (gfc_match_char ('(') == MATCH_NO) | |
1897 | return MATCH_NO; | |
1898 | ||
1899 | /* Also gobbles optional text. */ | |
1900 | if (gfc_match (" kind = ") == MATCH_YES) | |
1901 | m = MATCH_ERROR; | |
1902 | ||
e2d29968 PT |
1903 | loc = gfc_current_locus; |
1904 | ||
1905 | kind_expr: | |
6de9cd9a | 1906 | n = gfc_match_init_expr (&e); |
e2d29968 | 1907 | |
6de9cd9a | 1908 | if (n != MATCH_YES) |
e2d29968 | 1909 | { |
1c8bcdf7 | 1910 | if (gfc_matching_function) |
e2d29968 | 1911 | { |
1c8bcdf7 PT |
1912 | /* The function kind expression might include use associated or |
1913 | imported parameters and try again after the specification | |
1914 | expressions..... */ | |
e2d29968 PT |
1915 | if (gfc_match_char (')') != MATCH_YES) |
1916 | { | |
1917 | gfc_error ("Missing right parenthesis at %C"); | |
1918 | m = MATCH_ERROR; | |
1919 | goto no_match; | |
1920 | } | |
1921 | ||
1922 | gfc_free_expr (e); | |
e2d29968 PT |
1923 | gfc_undo_symbols (); |
1924 | return MATCH_YES; | |
1925 | } | |
1926 | else | |
1927 | { | |
1928 | /* ....or else, the match is real. */ | |
1929 | if (n == MATCH_NO) | |
1930 | gfc_error ("Expected initialization expression at %C"); | |
1931 | if (n != MATCH_YES) | |
1932 | return MATCH_ERROR; | |
1933 | } | |
1934 | } | |
6de9cd9a DN |
1935 | |
1936 | if (e->rank != 0) | |
1937 | { | |
1938 | gfc_error ("Expected scalar initialization expression at %C"); | |
1939 | m = MATCH_ERROR; | |
1940 | goto no_match; | |
1941 | } | |
1942 | ||
1943 | msg = gfc_extract_int (e, &ts->kind); | |
1c8bcdf7 | 1944 | |
6de9cd9a DN |
1945 | if (msg != NULL) |
1946 | { | |
1947 | gfc_error (msg); | |
1948 | m = MATCH_ERROR; | |
1949 | goto no_match; | |
1950 | } | |
1951 | ||
a8b3b0b6 CR |
1952 | /* Before throwing away the expression, let's see if we had a |
1953 | C interoperable kind (and store the fact). */ | |
1954 | if (e->ts.is_c_interop == 1) | |
1955 | { | |
1956 | /* Mark this as c interoperable if being declared with one | |
1957 | of the named constants from iso_c_binding. */ | |
1958 | ts->is_c_interop = e->ts.is_iso_c; | |
1959 | ts->f90_type = e->ts.f90_type; | |
1960 | } | |
1961 | ||
6de9cd9a DN |
1962 | gfc_free_expr (e); |
1963 | e = NULL; | |
1964 | ||
a8b3b0b6 CR |
1965 | /* Ignore errors to this point, if we've gotten here. This means |
1966 | we ignore the m=MATCH_ERROR from above. */ | |
e7a2d5fb | 1967 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a DN |
1968 | { |
1969 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
1970 | gfc_basic_typename (ts->type)); | |
96ee3a4a TB |
1971 | gfc_current_locus = where; |
1972 | return MATCH_ERROR; | |
6de9cd9a | 1973 | } |
96ee3a4a TB |
1974 | |
1975 | gfc_gobble_whitespace (); | |
8fc541d3 FXC |
1976 | if ((c = gfc_next_ascii_char ()) != ')' |
1977 | && (ts->type != BT_CHARACTER || c != ',')) | |
6de9cd9a | 1978 | { |
96ee3a4a TB |
1979 | if (ts->type == BT_CHARACTER) |
1980 | gfc_error ("Missing right parenthesis or comma at %C"); | |
1981 | else | |
1982 | gfc_error ("Missing right parenthesis at %C"); | |
e2d29968 | 1983 | m = MATCH_ERROR; |
6de9cd9a | 1984 | } |
a8b3b0b6 CR |
1985 | else |
1986 | /* All tests passed. */ | |
1987 | m = MATCH_YES; | |
6de9cd9a | 1988 | |
a8b3b0b6 CR |
1989 | if(m == MATCH_ERROR) |
1990 | gfc_current_locus = where; | |
1991 | ||
1992 | /* Return what we know from the test(s). */ | |
1993 | return m; | |
6de9cd9a DN |
1994 | |
1995 | no_match: | |
1996 | gfc_free_expr (e); | |
63645982 | 1997 | gfc_current_locus = where; |
6de9cd9a DN |
1998 | return m; |
1999 | } | |
2000 | ||
2001 | ||
187de1ed FXC |
2002 | static match |
2003 | match_char_kind (int * kind, int * is_iso_c) | |
2004 | { | |
2005 | locus where; | |
2006 | gfc_expr *e; | |
2007 | match m, n; | |
2008 | const char *msg; | |
2009 | ||
2010 | m = MATCH_NO; | |
2011 | e = NULL; | |
2012 | where = gfc_current_locus; | |
2013 | ||
2014 | n = gfc_match_init_expr (&e); | |
96ee3a4a | 2015 | |
1c8bcdf7 | 2016 | if (n != MATCH_YES && gfc_matching_function) |
96ee3a4a | 2017 | { |
1c8bcdf7 PT |
2018 | /* The expression might include use-associated or imported |
2019 | parameters and try again after the specification | |
2020 | expressions. */ | |
96ee3a4a | 2021 | gfc_free_expr (e); |
96ee3a4a TB |
2022 | gfc_undo_symbols (); |
2023 | return MATCH_YES; | |
2024 | } | |
2025 | ||
187de1ed FXC |
2026 | if (n == MATCH_NO) |
2027 | gfc_error ("Expected initialization expression at %C"); | |
2028 | if (n != MATCH_YES) | |
2029 | return MATCH_ERROR; | |
2030 | ||
2031 | if (e->rank != 0) | |
2032 | { | |
2033 | gfc_error ("Expected scalar initialization expression at %C"); | |
2034 | m = MATCH_ERROR; | |
2035 | goto no_match; | |
2036 | } | |
2037 | ||
2038 | msg = gfc_extract_int (e, kind); | |
2039 | *is_iso_c = e->ts.is_iso_c; | |
2040 | if (msg != NULL) | |
2041 | { | |
2042 | gfc_error (msg); | |
2043 | m = MATCH_ERROR; | |
2044 | goto no_match; | |
2045 | } | |
2046 | ||
2047 | gfc_free_expr (e); | |
2048 | ||
2049 | /* Ignore errors to this point, if we've gotten here. This means | |
2050 | we ignore the m=MATCH_ERROR from above. */ | |
2051 | if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0) | |
2052 | { | |
2053 | gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind); | |
2054 | m = MATCH_ERROR; | |
2055 | } | |
2056 | else | |
2057 | /* All tests passed. */ | |
2058 | m = MATCH_YES; | |
2059 | ||
2060 | if (m == MATCH_ERROR) | |
2061 | gfc_current_locus = where; | |
2062 | ||
2063 | /* Return what we know from the test(s). */ | |
2064 | return m; | |
2065 | ||
2066 | no_match: | |
2067 | gfc_free_expr (e); | |
2068 | gfc_current_locus = where; | |
2069 | return m; | |
2070 | } | |
2071 | ||
6de9cd9a DN |
2072 | /* Match the various kind/length specifications in a CHARACTER |
2073 | declaration. We don't return MATCH_NO. */ | |
2074 | ||
2075 | static match | |
636dff67 | 2076 | match_char_spec (gfc_typespec *ts) |
6de9cd9a | 2077 | { |
187de1ed | 2078 | int kind, seen_length, is_iso_c; |
6de9cd9a DN |
2079 | gfc_charlen *cl; |
2080 | gfc_expr *len; | |
2081 | match m; | |
187de1ed | 2082 | |
6de9cd9a DN |
2083 | len = NULL; |
2084 | seen_length = 0; | |
187de1ed FXC |
2085 | kind = 0; |
2086 | is_iso_c = 0; | |
6de9cd9a DN |
2087 | |
2088 | /* Try the old-style specification first. */ | |
2089 | old_char_selector = 0; | |
2090 | ||
2091 | m = match_char_length (&len); | |
2092 | if (m != MATCH_NO) | |
2093 | { | |
2094 | if (m == MATCH_YES) | |
2095 | old_char_selector = 1; | |
2096 | seen_length = 1; | |
2097 | goto done; | |
2098 | } | |
2099 | ||
2100 | m = gfc_match_char ('('); | |
2101 | if (m != MATCH_YES) | |
2102 | { | |
a8b3b0b6 | 2103 | m = MATCH_YES; /* Character without length is a single char. */ |
6de9cd9a DN |
2104 | goto done; |
2105 | } | |
2106 | ||
a8b3b0b6 | 2107 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ |
6de9cd9a DN |
2108 | if (gfc_match (" kind =") == MATCH_YES) |
2109 | { | |
187de1ed | 2110 | m = match_char_kind (&kind, &is_iso_c); |
a8b3b0b6 | 2111 | |
6de9cd9a DN |
2112 | if (m == MATCH_ERROR) |
2113 | goto done; | |
2114 | if (m == MATCH_NO) | |
2115 | goto syntax; | |
2116 | ||
2117 | if (gfc_match (" , len =") == MATCH_NO) | |
2118 | goto rparen; | |
2119 | ||
2120 | m = char_len_param_value (&len); | |
2121 | if (m == MATCH_NO) | |
2122 | goto syntax; | |
2123 | if (m == MATCH_ERROR) | |
2124 | goto done; | |
2125 | seen_length = 1; | |
2126 | ||
2127 | goto rparen; | |
2128 | } | |
2129 | ||
66e4ab31 | 2130 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ |
6de9cd9a DN |
2131 | if (gfc_match (" len =") == MATCH_YES) |
2132 | { | |
2133 | m = char_len_param_value (&len); | |
2134 | if (m == MATCH_NO) | |
2135 | goto syntax; | |
2136 | if (m == MATCH_ERROR) | |
2137 | goto done; | |
2138 | seen_length = 1; | |
2139 | ||
2140 | if (gfc_match_char (')') == MATCH_YES) | |
2141 | goto done; | |
2142 | ||
2143 | if (gfc_match (" , kind =") != MATCH_YES) | |
2144 | goto syntax; | |
2145 | ||
187de1ed FXC |
2146 | if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR) |
2147 | goto done; | |
6de9cd9a DN |
2148 | |
2149 | goto rparen; | |
2150 | } | |
2151 | ||
66e4ab31 | 2152 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
6de9cd9a DN |
2153 | m = char_len_param_value (&len); |
2154 | if (m == MATCH_NO) | |
2155 | goto syntax; | |
2156 | if (m == MATCH_ERROR) | |
2157 | goto done; | |
2158 | seen_length = 1; | |
2159 | ||
2160 | m = gfc_match_char (')'); | |
2161 | if (m == MATCH_YES) | |
2162 | goto done; | |
2163 | ||
2164 | if (gfc_match_char (',') != MATCH_YES) | |
2165 | goto syntax; | |
2166 | ||
a8b3b0b6 | 2167 | gfc_match (" kind ="); /* Gobble optional text. */ |
6de9cd9a | 2168 | |
187de1ed | 2169 | m = match_char_kind (&kind, &is_iso_c); |
6de9cd9a DN |
2170 | if (m == MATCH_ERROR) |
2171 | goto done; | |
2172 | if (m == MATCH_NO) | |
2173 | goto syntax; | |
2174 | ||
2175 | rparen: | |
2176 | /* Require a right-paren at this point. */ | |
2177 | m = gfc_match_char (')'); | |
2178 | if (m == MATCH_YES) | |
2179 | goto done; | |
2180 | ||
2181 | syntax: | |
2182 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
2183 | m = MATCH_ERROR; | |
16f8ffc8 JD |
2184 | gfc_free_expr (len); |
2185 | return m; | |
6de9cd9a DN |
2186 | |
2187 | done: | |
a99d95a2 PT |
2188 | /* Deal with character functions after USE and IMPORT statements. */ |
2189 | if (gfc_matching_function) | |
1c8bcdf7 | 2190 | { |
a99d95a2 | 2191 | gfc_free_expr (len); |
1c8bcdf7 PT |
2192 | gfc_undo_symbols (); |
2193 | return MATCH_YES; | |
2194 | } | |
2195 | ||
6de9cd9a DN |
2196 | if (m != MATCH_YES) |
2197 | { | |
2198 | gfc_free_expr (len); | |
2199 | return m; | |
2200 | } | |
2201 | ||
2202 | /* Do some final massaging of the length values. */ | |
2203 | cl = gfc_get_charlen (); | |
2204 | cl->next = gfc_current_ns->cl_list; | |
2205 | gfc_current_ns->cl_list = cl; | |
2206 | ||
2207 | if (seen_length == 0) | |
2208 | cl->length = gfc_int_expr (1); | |
2209 | else | |
5cd09fac | 2210 | cl->length = len; |
6de9cd9a DN |
2211 | |
2212 | ts->cl = cl; | |
187de1ed | 2213 | ts->kind = kind == 0 ? gfc_default_character_kind : kind; |
6de9cd9a | 2214 | |
a8b3b0b6 CR |
2215 | /* We have to know if it was a c interoperable kind so we can |
2216 | do accurate type checking of bind(c) procs, etc. */ | |
187de1ed FXC |
2217 | if (kind != 0) |
2218 | /* Mark this as c interoperable if being declared with one | |
2219 | of the named constants from iso_c_binding. */ | |
2220 | ts->is_c_interop = is_iso_c; | |
a8b3b0b6 | 2221 | else if (len != NULL) |
187de1ed FXC |
2222 | /* Here, we might have parsed something such as: character(c_char) |
2223 | In this case, the parsing code above grabs the c_char when | |
2224 | looking for the length (line 1690, roughly). it's the last | |
2225 | testcase for parsing the kind params of a character variable. | |
2226 | However, it's not actually the length. this seems like it | |
2227 | could be an error. | |
2228 | To see if the user used a C interop kind, test the expr | |
2229 | of the so called length, and see if it's C interoperable. */ | |
2230 | ts->is_c_interop = len->ts.is_iso_c; | |
a8b3b0b6 | 2231 | |
6de9cd9a DN |
2232 | return MATCH_YES; |
2233 | } | |
2234 | ||
2235 | ||
2236 | /* Matches a type specification. If successful, sets the ts structure | |
2237 | to the matched specification. This is necessary for FUNCTION and | |
2238 | IMPLICIT statements. | |
2239 | ||
d51347f9 | 2240 | If implicit_flag is nonzero, then we don't check for the optional |
e5ddaa24 | 2241 | kind specification. Not doing so is needed for matching an IMPLICIT |
6de9cd9a DN |
2242 | statement correctly. */ |
2243 | ||
e2d29968 PT |
2244 | match |
2245 | gfc_match_type_spec (gfc_typespec *ts, int implicit_flag) | |
6de9cd9a DN |
2246 | { |
2247 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2248 | gfc_symbol *sym; | |
2249 | match m; | |
8fc541d3 | 2250 | char c; |
1c8bcdf7 | 2251 | bool seen_deferred_kind; |
6de9cd9a | 2252 | |
1c8bcdf7 PT |
2253 | /* A belt and braces check that the typespec is correctly being treated |
2254 | as a deferred characteristic association. */ | |
2255 | seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION) | |
a99d95a2 PT |
2256 | && (gfc_current_block ()->result->ts.kind == -1) |
2257 | && (ts->kind == -1); | |
6de9cd9a | 2258 | gfc_clear_ts (ts); |
1c8bcdf7 PT |
2259 | if (seen_deferred_kind) |
2260 | ts->kind = -1; | |
6de9cd9a | 2261 | |
a8b3b0b6 CR |
2262 | /* Clear the current binding label, in case one is given. */ |
2263 | curr_binding_label[0] = '\0'; | |
2264 | ||
5f700e6d AL |
2265 | if (gfc_match (" byte") == MATCH_YES) |
2266 | { | |
d51347f9 | 2267 | if (gfc_notify_std(GFC_STD_GNU, "Extension: BYTE type at %C") |
5f700e6d AL |
2268 | == FAILURE) |
2269 | return MATCH_ERROR; | |
2270 | ||
2271 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
2272 | { | |
2273 | gfc_error ("BYTE type used at %C " | |
2274 | "is not available on the target machine"); | |
2275 | return MATCH_ERROR; | |
2276 | } | |
d51347f9 | 2277 | |
5f700e6d AL |
2278 | ts->type = BT_INTEGER; |
2279 | ts->kind = 1; | |
2280 | return MATCH_YES; | |
2281 | } | |
2282 | ||
6de9cd9a DN |
2283 | if (gfc_match (" integer") == MATCH_YES) |
2284 | { | |
2285 | ts->type = BT_INTEGER; | |
9d64df18 | 2286 | ts->kind = gfc_default_integer_kind; |
6de9cd9a DN |
2287 | goto get_kind; |
2288 | } | |
2289 | ||
2290 | if (gfc_match (" character") == MATCH_YES) | |
2291 | { | |
2292 | ts->type = BT_CHARACTER; | |
e5ddaa24 TS |
2293 | if (implicit_flag == 0) |
2294 | return match_char_spec (ts); | |
2295 | else | |
2296 | return MATCH_YES; | |
6de9cd9a DN |
2297 | } |
2298 | ||
2299 | if (gfc_match (" real") == MATCH_YES) | |
2300 | { | |
2301 | ts->type = BT_REAL; | |
9d64df18 | 2302 | ts->kind = gfc_default_real_kind; |
6de9cd9a DN |
2303 | goto get_kind; |
2304 | } | |
2305 | ||
2306 | if (gfc_match (" double precision") == MATCH_YES) | |
2307 | { | |
2308 | ts->type = BT_REAL; | |
9d64df18 | 2309 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
2310 | return MATCH_YES; |
2311 | } | |
2312 | ||
2313 | if (gfc_match (" complex") == MATCH_YES) | |
2314 | { | |
2315 | ts->type = BT_COMPLEX; | |
9d64df18 | 2316 | ts->kind = gfc_default_complex_kind; |
6de9cd9a DN |
2317 | goto get_kind; |
2318 | } | |
2319 | ||
2320 | if (gfc_match (" double complex") == MATCH_YES) | |
2321 | { | |
df8652dc SK |
2322 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
2323 | "conform to the Fortran 95 standard") == FAILURE) | |
2324 | return MATCH_ERROR; | |
2325 | ||
6de9cd9a | 2326 | ts->type = BT_COMPLEX; |
9d64df18 | 2327 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
2328 | return MATCH_YES; |
2329 | } | |
2330 | ||
2331 | if (gfc_match (" logical") == MATCH_YES) | |
2332 | { | |
2333 | ts->type = BT_LOGICAL; | |
9d64df18 | 2334 | ts->kind = gfc_default_logical_kind; |
6de9cd9a DN |
2335 | goto get_kind; |
2336 | } | |
2337 | ||
2338 | m = gfc_match (" type ( %n )", name); | |
2339 | if (m != MATCH_YES) | |
2340 | return m; | |
2341 | ||
1c8bcdf7 PT |
2342 | ts->type = BT_DERIVED; |
2343 | ||
2344 | /* Defer association of the derived type until the end of the | |
2345 | specification block. However, if the derived type can be | |
2346 | found, add it to the typespec. */ | |
2347 | if (gfc_matching_function) | |
e2d29968 | 2348 | { |
1c8bcdf7 PT |
2349 | ts->derived = NULL; |
2350 | if (gfc_current_state () != COMP_INTERFACE | |
2351 | && !gfc_find_symbol (name, NULL, 1, &sym) && sym) | |
2352 | ts->derived = sym; | |
e2d29968 PT |
2353 | return MATCH_YES; |
2354 | } | |
2355 | ||
2356 | /* Search for the name but allow the components to be defined later. If | |
2357 | type = -1, this typespec has been seen in a function declaration but | |
1c8bcdf7 PT |
2358 | the type could not be accessed at that point. */ |
2359 | sym = NULL; | |
e2d29968 | 2360 | if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym)) |
6de9cd9a DN |
2361 | { |
2362 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2363 | return MATCH_ERROR; | |
2364 | } | |
e2d29968 PT |
2365 | else if (ts->kind == -1) |
2366 | { | |
1c8bcdf7 PT |
2367 | int iface = gfc_state_stack->previous->state != COMP_INTERFACE |
2368 | || gfc_current_ns->has_import_set; | |
2369 | if (gfc_find_symbol (name, NULL, iface, &sym)) | |
e2d29968 PT |
2370 | { |
2371 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2372 | return MATCH_ERROR; | |
2373 | } | |
2374 | ||
1c8bcdf7 | 2375 | ts->kind = 0; |
e2d29968 PT |
2376 | if (sym == NULL) |
2377 | return MATCH_NO; | |
2378 | } | |
6de9cd9a DN |
2379 | |
2380 | if (sym->attr.flavor != FL_DERIVED | |
231b2fcc | 2381 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
2382 | return MATCH_ERROR; |
2383 | ||
1c8bcdf7 | 2384 | gfc_set_sym_referenced (sym); |
6de9cd9a DN |
2385 | ts->derived = sym; |
2386 | ||
2387 | return MATCH_YES; | |
2388 | ||
2389 | get_kind: | |
2390 | /* For all types except double, derived and character, look for an | |
2391 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
e5ddaa24 | 2392 | if (implicit_flag == 1) |
6de9cd9a DN |
2393 | return MATCH_YES; |
2394 | ||
0ff0dfbf TS |
2395 | if (gfc_current_form == FORM_FREE) |
2396 | { | |
8fc541d3 | 2397 | c = gfc_peek_ascii_char(); |
0ff0dfbf | 2398 | if (!gfc_is_whitespace(c) && c != '*' && c != '(' |
636dff67 | 2399 | && c != ':' && c != ',') |
0ff0dfbf TS |
2400 | return MATCH_NO; |
2401 | } | |
2402 | ||
e2d29968 | 2403 | m = gfc_match_kind_spec (ts, false); |
6de9cd9a DN |
2404 | if (m == MATCH_NO && ts->type != BT_CHARACTER) |
2405 | m = gfc_match_old_kind_spec (ts); | |
2406 | ||
1c8bcdf7 PT |
2407 | /* Defer association of the KIND expression of function results |
2408 | until after USE and IMPORT statements. */ | |
2409 | if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ()) | |
2410 | || gfc_matching_function) | |
2411 | return MATCH_YES; | |
2412 | ||
6de9cd9a DN |
2413 | if (m == MATCH_NO) |
2414 | m = MATCH_YES; /* No kind specifier found. */ | |
2415 | ||
2416 | return m; | |
2417 | } | |
2418 | ||
2419 | ||
e5ddaa24 TS |
2420 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
2421 | already matched in parse.c, or we would not end up here in the | |
2422 | first place. So the only thing we need to check, is if there is | |
2423 | trailing garbage. If not, the match is successful. */ | |
2424 | ||
2425 | match | |
2426 | gfc_match_implicit_none (void) | |
2427 | { | |
e5ddaa24 TS |
2428 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
2429 | } | |
2430 | ||
2431 | ||
2432 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
2433 | ||
2434 | static match | |
1107b970 | 2435 | match_implicit_range (void) |
e5ddaa24 | 2436 | { |
8fc541d3 FXC |
2437 | char c, c1, c2; |
2438 | int inner; | |
e5ddaa24 TS |
2439 | locus cur_loc; |
2440 | ||
2441 | cur_loc = gfc_current_locus; | |
2442 | ||
2443 | gfc_gobble_whitespace (); | |
8fc541d3 | 2444 | c = gfc_next_ascii_char (); |
e5ddaa24 TS |
2445 | if (c != '(') |
2446 | { | |
2447 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
2448 | goto bad; | |
2449 | } | |
2450 | ||
2451 | inner = 1; | |
2452 | while (inner) | |
2453 | { | |
2454 | gfc_gobble_whitespace (); | |
8fc541d3 | 2455 | c1 = gfc_next_ascii_char (); |
e5ddaa24 TS |
2456 | if (!ISALPHA (c1)) |
2457 | goto bad; | |
2458 | ||
2459 | gfc_gobble_whitespace (); | |
8fc541d3 | 2460 | c = gfc_next_ascii_char (); |
e5ddaa24 TS |
2461 | |
2462 | switch (c) | |
2463 | { | |
2464 | case ')': | |
66e4ab31 | 2465 | inner = 0; /* Fall through. */ |
e5ddaa24 TS |
2466 | |
2467 | case ',': | |
2468 | c2 = c1; | |
2469 | break; | |
2470 | ||
2471 | case '-': | |
2472 | gfc_gobble_whitespace (); | |
8fc541d3 | 2473 | c2 = gfc_next_ascii_char (); |
e5ddaa24 TS |
2474 | if (!ISALPHA (c2)) |
2475 | goto bad; | |
2476 | ||
2477 | gfc_gobble_whitespace (); | |
8fc541d3 | 2478 | c = gfc_next_ascii_char (); |
e5ddaa24 TS |
2479 | |
2480 | if ((c != ',') && (c != ')')) | |
2481 | goto bad; | |
2482 | if (c == ')') | |
2483 | inner = 0; | |
2484 | ||
2485 | break; | |
2486 | ||
2487 | default: | |
2488 | goto bad; | |
2489 | } | |
2490 | ||
2491 | if (c1 > c2) | |
2492 | { | |
2493 | gfc_error ("Letters must be in alphabetic order in " | |
2494 | "IMPLICIT statement at %C"); | |
2495 | goto bad; | |
2496 | } | |
2497 | ||
2498 | /* See if we can add the newly matched range to the pending | |
636dff67 SK |
2499 | implicits from this IMPLICIT statement. We do not check for |
2500 | conflicts with whatever earlier IMPLICIT statements may have | |
2501 | set. This is done when we've successfully finished matching | |
2502 | the current one. */ | |
1107b970 | 2503 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
e5ddaa24 TS |
2504 | goto bad; |
2505 | } | |
2506 | ||
2507 | return MATCH_YES; | |
2508 | ||
2509 | bad: | |
2510 | gfc_syntax_error (ST_IMPLICIT); | |
2511 | ||
2512 | gfc_current_locus = cur_loc; | |
2513 | return MATCH_ERROR; | |
2514 | } | |
2515 | ||
2516 | ||
2517 | /* Match an IMPLICIT statement, storing the types for | |
2518 | gfc_set_implicit() if the statement is accepted by the parser. | |
2519 | There is a strange looking, but legal syntactic construction | |
2520 | possible. It looks like: | |
2521 | ||
2522 | IMPLICIT INTEGER (a-b) (c-d) | |
2523 | ||
2524 | This is legal if "a-b" is a constant expression that happens to | |
2525 | equal one of the legal kinds for integers. The real problem | |
2526 | happens with an implicit specification that looks like: | |
2527 | ||
2528 | IMPLICIT INTEGER (a-b) | |
2529 | ||
2530 | In this case, a typespec matcher that is "greedy" (as most of the | |
2531 | matchers are) gobbles the character range as a kindspec, leaving | |
2532 | nothing left. We therefore have to go a bit more slowly in the | |
2533 | matching process by inhibiting the kindspec checking during | |
2534 | typespec matching and checking for a kind later. */ | |
2535 | ||
2536 | match | |
2537 | gfc_match_implicit (void) | |
2538 | { | |
2539 | gfc_typespec ts; | |
2540 | locus cur_loc; | |
8fc541d3 | 2541 | char c; |
e5ddaa24 TS |
2542 | match m; |
2543 | ||
44000dbb JD |
2544 | gfc_clear_ts (&ts); |
2545 | ||
e5ddaa24 TS |
2546 | /* We don't allow empty implicit statements. */ |
2547 | if (gfc_match_eos () == MATCH_YES) | |
2548 | { | |
2549 | gfc_error ("Empty IMPLICIT statement at %C"); | |
2550 | return MATCH_ERROR; | |
2551 | } | |
2552 | ||
e5ddaa24 TS |
2553 | do |
2554 | { | |
1107b970 PB |
2555 | /* First cleanup. */ |
2556 | gfc_clear_new_implicit (); | |
2557 | ||
e5ddaa24 | 2558 | /* A basic type is mandatory here. */ |
e2d29968 | 2559 | m = gfc_match_type_spec (&ts, 1); |
e5ddaa24 TS |
2560 | if (m == MATCH_ERROR) |
2561 | goto error; | |
2562 | if (m == MATCH_NO) | |
2563 | goto syntax; | |
2564 | ||
2565 | cur_loc = gfc_current_locus; | |
1107b970 | 2566 | m = match_implicit_range (); |
e5ddaa24 TS |
2567 | |
2568 | if (m == MATCH_YES) | |
2569 | { | |
1107b970 | 2570 | /* We may have <TYPE> (<RANGE>). */ |
e5ddaa24 | 2571 | gfc_gobble_whitespace (); |
8fc541d3 | 2572 | c = gfc_next_ascii_char (); |
e5ddaa24 | 2573 | if ((c == '\n') || (c == ',')) |
1107b970 PB |
2574 | { |
2575 | /* Check for CHARACTER with no length parameter. */ | |
2576 | if (ts.type == BT_CHARACTER && !ts.cl) | |
2577 | { | |
9d64df18 | 2578 | ts.kind = gfc_default_character_kind; |
1107b970 PB |
2579 | ts.cl = gfc_get_charlen (); |
2580 | ts.cl->next = gfc_current_ns->cl_list; | |
2581 | gfc_current_ns->cl_list = ts.cl; | |
2582 | ts.cl->length = gfc_int_expr (1); | |
2583 | } | |
2584 | ||
2585 | /* Record the Successful match. */ | |
2586 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2587 | return MATCH_ERROR; | |
2588 | continue; | |
2589 | } | |
e5ddaa24 TS |
2590 | |
2591 | gfc_current_locus = cur_loc; | |
2592 | } | |
2593 | ||
1107b970 PB |
2594 | /* Discard the (incorrectly) matched range. */ |
2595 | gfc_clear_new_implicit (); | |
2596 | ||
2597 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
2598 | if (ts.type == BT_CHARACTER) | |
2599 | m = match_char_spec (&ts); | |
2600 | else | |
e5ddaa24 | 2601 | { |
e2d29968 | 2602 | m = gfc_match_kind_spec (&ts, false); |
e5ddaa24 | 2603 | if (m == MATCH_NO) |
1107b970 PB |
2604 | { |
2605 | m = gfc_match_old_kind_spec (&ts); | |
2606 | if (m == MATCH_ERROR) | |
2607 | goto error; | |
2608 | if (m == MATCH_NO) | |
2609 | goto syntax; | |
2610 | } | |
e5ddaa24 | 2611 | } |
1107b970 PB |
2612 | if (m == MATCH_ERROR) |
2613 | goto error; | |
e5ddaa24 | 2614 | |
1107b970 | 2615 | m = match_implicit_range (); |
e5ddaa24 TS |
2616 | if (m == MATCH_ERROR) |
2617 | goto error; | |
2618 | if (m == MATCH_NO) | |
2619 | goto syntax; | |
2620 | ||
2621 | gfc_gobble_whitespace (); | |
8fc541d3 | 2622 | c = gfc_next_ascii_char (); |
e5ddaa24 TS |
2623 | if ((c != '\n') && (c != ',')) |
2624 | goto syntax; | |
2625 | ||
1107b970 PB |
2626 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2627 | return MATCH_ERROR; | |
e5ddaa24 TS |
2628 | } |
2629 | while (c == ','); | |
2630 | ||
1107b970 | 2631 | return MATCH_YES; |
e5ddaa24 TS |
2632 | |
2633 | syntax: | |
2634 | gfc_syntax_error (ST_IMPLICIT); | |
2635 | ||
2636 | error: | |
2637 | return MATCH_ERROR; | |
2638 | } | |
2639 | ||
66e4ab31 | 2640 | |
8998be20 TB |
2641 | match |
2642 | gfc_match_import (void) | |
2643 | { | |
2644 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2645 | match m; | |
2646 | gfc_symbol *sym; | |
2647 | gfc_symtree *st; | |
2648 | ||
66e4ab31 SK |
2649 | if (gfc_current_ns->proc_name == NULL |
2650 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
8998be20 TB |
2651 | { |
2652 | gfc_error ("IMPORT statement at %C only permitted in " | |
2653 | "an INTERFACE body"); | |
2654 | return MATCH_ERROR; | |
2655 | } | |
2656 | ||
636dff67 | 2657 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
8998be20 TB |
2658 | == FAILURE) |
2659 | return MATCH_ERROR; | |
2660 | ||
2661 | if (gfc_match_eos () == MATCH_YES) | |
2662 | { | |
2663 | /* All host variables should be imported. */ | |
2664 | gfc_current_ns->has_import_set = 1; | |
2665 | return MATCH_YES; | |
2666 | } | |
2667 | ||
2668 | if (gfc_match (" ::") == MATCH_YES) | |
2669 | { | |
2670 | if (gfc_match_eos () == MATCH_YES) | |
636dff67 SK |
2671 | { |
2672 | gfc_error ("Expecting list of named entities at %C"); | |
2673 | return MATCH_ERROR; | |
2674 | } | |
8998be20 TB |
2675 | } |
2676 | ||
2677 | for(;;) | |
2678 | { | |
2679 | m = gfc_match (" %n", name); | |
2680 | switch (m) | |
2681 | { | |
2682 | case MATCH_YES: | |
36d3fb4c | 2683 | if (gfc_current_ns->parent != NULL |
66e4ab31 | 2684 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
36d3fb4c PT |
2685 | { |
2686 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2687 | return MATCH_ERROR; | |
2688 | } | |
2689 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
66e4ab31 SK |
2690 | && gfc_find_symbol (name, |
2691 | gfc_current_ns->proc_name->ns->parent, | |
2692 | 1, &sym)) | |
636dff67 SK |
2693 | { |
2694 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2695 | return MATCH_ERROR; | |
2696 | } | |
2697 | ||
2698 | if (sym == NULL) | |
2699 | { | |
2700 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2701 | "at %C - does not exist.", name); | |
2702 | return MATCH_ERROR; | |
2703 | } | |
2704 | ||
d51347f9 | 2705 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) |
636dff67 SK |
2706 | { |
2707 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2708 | "at %C.", name); | |
2709 | goto next_item; | |
2710 | } | |
2711 | ||
2712 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
2713 | st->n.sym = sym; | |
2714 | sym->refs++; | |
5a8af0b4 | 2715 | sym->attr.imported = 1; |
8998be20 TB |
2716 | |
2717 | goto next_item; | |
2718 | ||
2719 | case MATCH_NO: | |
2720 | break; | |
2721 | ||
2722 | case MATCH_ERROR: | |
2723 | return MATCH_ERROR; | |
2724 | } | |
2725 | ||
2726 | next_item: | |
2727 | if (gfc_match_eos () == MATCH_YES) | |
2728 | break; | |
2729 | if (gfc_match_char (',') != MATCH_YES) | |
2730 | goto syntax; | |
2731 | } | |
2732 | ||
2733 | return MATCH_YES; | |
2734 | ||
2735 | syntax: | |
2736 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2737 | return MATCH_ERROR; | |
2738 | } | |
e5ddaa24 | 2739 | |
66e4ab31 | 2740 | |
f2449db4 RS |
2741 | /* A minimal implementation of gfc_match without whitespace, escape |
2742 | characters or variable arguments. Returns true if the next | |
2743 | characters match the TARGET template exactly. */ | |
2744 | ||
2745 | static bool | |
2746 | match_string_p (const char *target) | |
2747 | { | |
2748 | const char *p; | |
2749 | ||
2750 | for (p = target; *p; p++) | |
8fc541d3 | 2751 | if ((char) gfc_next_ascii_char () != *p) |
f2449db4 RS |
2752 | return false; |
2753 | return true; | |
2754 | } | |
2755 | ||
6de9cd9a DN |
2756 | /* Matches an attribute specification including array specs. If |
2757 | successful, leaves the variables current_attr and current_as | |
2758 | holding the specification. Also sets the colon_seen variable for | |
2759 | later use by matchers associated with initializations. | |
2760 | ||
2761 | This subroutine is a little tricky in the sense that we don't know | |
2762 | if we really have an attr-spec until we hit the double colon. | |
2763 | Until that time, we can only return MATCH_NO. This forces us to | |
2764 | check for duplicate specification at this level. */ | |
2765 | ||
2766 | static match | |
2767 | match_attr_spec (void) | |
2768 | { | |
6de9cd9a DN |
2769 | /* Modifiers that can exist in a type statement. */ |
2770 | typedef enum | |
2771 | { GFC_DECL_BEGIN = 0, | |
2772 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
2773 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
ee7e677f TB |
2774 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
2775 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
f2449db4 | 2776 | DECL_IS_BIND_C, DECL_NONE, |
6de9cd9a DN |
2777 | GFC_DECL_END /* Sentinel */ |
2778 | } | |
2779 | decl_types; | |
2780 | ||
2781 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
2782 | #define NUM_DECL GFC_DECL_END | |
2783 | ||
6de9cd9a DN |
2784 | locus start, seen_at[NUM_DECL]; |
2785 | int seen[NUM_DECL]; | |
2786 | decl_types d; | |
2787 | const char *attr; | |
2788 | match m; | |
17b1d2a0 | 2789 | gfc_try t; |
6de9cd9a DN |
2790 | |
2791 | gfc_clear_attr (¤t_attr); | |
63645982 | 2792 | start = gfc_current_locus; |
6de9cd9a DN |
2793 | |
2794 | current_as = NULL; | |
2795 | colon_seen = 0; | |
2796 | ||
2797 | /* See if we get all of the keywords up to the final double colon. */ | |
2798 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2799 | seen[d] = 0; | |
2800 | ||
2801 | for (;;) | |
2802 | { | |
8fc541d3 | 2803 | char ch; |
a8b3b0b6 | 2804 | |
f2449db4 RS |
2805 | d = DECL_NONE; |
2806 | gfc_gobble_whitespace (); | |
2807 | ||
8fc541d3 | 2808 | ch = gfc_next_ascii_char (); |
f2449db4 RS |
2809 | if (ch == ':') |
2810 | { | |
2811 | /* This is the successful exit condition for the loop. */ | |
8fc541d3 | 2812 | if (gfc_next_ascii_char () == ':') |
f2449db4 RS |
2813 | break; |
2814 | } | |
2815 | else if (ch == ',') | |
a8b3b0b6 | 2816 | { |
a8b3b0b6 | 2817 | gfc_gobble_whitespace (); |
8fc541d3 | 2818 | switch (gfc_peek_ascii_char ()) |
a8b3b0b6 | 2819 | { |
f2449db4 RS |
2820 | case 'a': |
2821 | if (match_string_p ("allocatable")) | |
2822 | d = DECL_ALLOCATABLE; | |
2823 | break; | |
2824 | ||
2825 | case 'b': | |
a8b3b0b6 | 2826 | /* Try and match the bind(c). */ |
1eabf70a | 2827 | m = gfc_match_bind_c (NULL, true); |
129d15a3 | 2828 | if (m == MATCH_YES) |
a8b3b0b6 | 2829 | d = DECL_IS_BIND_C; |
129d15a3 JW |
2830 | else if (m == MATCH_ERROR) |
2831 | goto cleanup; | |
f2449db4 RS |
2832 | break; |
2833 | ||
2834 | case 'd': | |
2835 | if (match_string_p ("dimension")) | |
2836 | d = DECL_DIMENSION; | |
2837 | break; | |
2838 | ||
2839 | case 'e': | |
2840 | if (match_string_p ("external")) | |
2841 | d = DECL_EXTERNAL; | |
2842 | break; | |
2843 | ||
2844 | case 'i': | |
2845 | if (match_string_p ("int")) | |
2846 | { | |
8fc541d3 | 2847 | ch = gfc_next_ascii_char (); |
f2449db4 RS |
2848 | if (ch == 'e') |
2849 | { | |
2850 | if (match_string_p ("nt")) | |
2851 | { | |
2852 | /* Matched "intent". */ | |
2853 | /* TODO: Call match_intent_spec from here. */ | |
2854 | if (gfc_match (" ( in out )") == MATCH_YES) | |
2855 | d = DECL_INOUT; | |
2856 | else if (gfc_match (" ( in )") == MATCH_YES) | |
2857 | d = DECL_IN; | |
2858 | else if (gfc_match (" ( out )") == MATCH_YES) | |
2859 | d = DECL_OUT; | |
2860 | } | |
2861 | } | |
2862 | else if (ch == 'r') | |
2863 | { | |
2864 | if (match_string_p ("insic")) | |
2865 | { | |
2866 | /* Matched "intrinsic". */ | |
2867 | d = DECL_INTRINSIC; | |
2868 | } | |
2869 | } | |
2870 | } | |
2871 | break; | |
2872 | ||
2873 | case 'o': | |
2874 | if (match_string_p ("optional")) | |
2875 | d = DECL_OPTIONAL; | |
2876 | break; | |
2877 | ||
2878 | case 'p': | |
8fc541d3 FXC |
2879 | gfc_next_ascii_char (); |
2880 | switch (gfc_next_ascii_char ()) | |
f2449db4 RS |
2881 | { |
2882 | case 'a': | |
2883 | if (match_string_p ("rameter")) | |
2884 | { | |
2885 | /* Matched "parameter". */ | |
2886 | d = DECL_PARAMETER; | |
2887 | } | |
2888 | break; | |
2889 | ||
2890 | case 'o': | |
2891 | if (match_string_p ("inter")) | |
2892 | { | |
2893 | /* Matched "pointer". */ | |
2894 | d = DECL_POINTER; | |
2895 | } | |
2896 | break; | |
2897 | ||
2898 | case 'r': | |
8fc541d3 | 2899 | ch = gfc_next_ascii_char (); |
f2449db4 RS |
2900 | if (ch == 'i') |
2901 | { | |
2902 | if (match_string_p ("vate")) | |
2903 | { | |
2904 | /* Matched "private". */ | |
2905 | d = DECL_PRIVATE; | |
2906 | } | |
2907 | } | |
2908 | else if (ch == 'o') | |
2909 | { | |
2910 | if (match_string_p ("tected")) | |
2911 | { | |
2912 | /* Matched "protected". */ | |
2913 | d = DECL_PROTECTED; | |
2914 | } | |
2915 | } | |
2916 | break; | |
2917 | ||
2918 | case 'u': | |
2919 | if (match_string_p ("blic")) | |
2920 | { | |
2921 | /* Matched "public". */ | |
2922 | d = DECL_PUBLIC; | |
2923 | } | |
2924 | break; | |
2925 | } | |
2926 | break; | |
2927 | ||
2928 | case 's': | |
2929 | if (match_string_p ("save")) | |
2930 | d = DECL_SAVE; | |
2931 | break; | |
2932 | ||
2933 | case 't': | |
2934 | if (match_string_p ("target")) | |
2935 | d = DECL_TARGET; | |
2936 | break; | |
2937 | ||
2938 | case 'v': | |
8fc541d3 FXC |
2939 | gfc_next_ascii_char (); |
2940 | ch = gfc_next_ascii_char (); | |
f2449db4 RS |
2941 | if (ch == 'a') |
2942 | { | |
2943 | if (match_string_p ("lue")) | |
2944 | { | |
2945 | /* Matched "value". */ | |
2946 | d = DECL_VALUE; | |
2947 | } | |
2948 | } | |
2949 | else if (ch == 'o') | |
2950 | { | |
2951 | if (match_string_p ("latile")) | |
2952 | { | |
2953 | /* Matched "volatile". */ | |
2954 | d = DECL_VOLATILE; | |
2955 | } | |
2956 | } | |
2957 | break; | |
a8b3b0b6 CR |
2958 | } |
2959 | } | |
d468bcdb | 2960 | |
f2449db4 RS |
2961 | /* No double colon and no recognizable decl_type, so assume that |
2962 | we've been looking at something else the whole time. */ | |
2963 | if (d == DECL_NONE) | |
2964 | { | |
2965 | m = MATCH_NO; | |
2966 | goto cleanup; | |
2967 | } | |
d51347f9 | 2968 | |
acb388a0 JD |
2969 | /* Check to make sure any parens are paired up correctly. */ |
2970 | if (gfc_match_parens () == MATCH_ERROR) | |
2971 | { | |
2972 | m = MATCH_ERROR; | |
2973 | goto cleanup; | |
2974 | } | |
2975 | ||
6de9cd9a | 2976 | seen[d]++; |
63645982 | 2977 | seen_at[d] = gfc_current_locus; |
6de9cd9a DN |
2978 | |
2979 | if (d == DECL_DIMENSION) | |
2980 | { | |
2981 | m = gfc_match_array_spec (¤t_as); | |
2982 | ||
2983 | if (m == MATCH_NO) | |
2984 | { | |
2985 | gfc_error ("Missing dimension specification at %C"); | |
2986 | m = MATCH_ERROR; | |
2987 | } | |
2988 | ||
2989 | if (m == MATCH_ERROR) | |
2990 | goto cleanup; | |
2991 | } | |
2992 | } | |
2993 | ||
6de9cd9a DN |
2994 | /* Since we've seen a double colon, we have to be looking at an |
2995 | attr-spec. This means that we can now issue errors. */ | |
2996 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2997 | if (seen[d] > 1) | |
2998 | { | |
2999 | switch (d) | |
3000 | { | |
3001 | case DECL_ALLOCATABLE: | |
3002 | attr = "ALLOCATABLE"; | |
3003 | break; | |
3004 | case DECL_DIMENSION: | |
3005 | attr = "DIMENSION"; | |
3006 | break; | |
3007 | case DECL_EXTERNAL: | |
3008 | attr = "EXTERNAL"; | |
3009 | break; | |
3010 | case DECL_IN: | |
3011 | attr = "INTENT (IN)"; | |
3012 | break; | |
3013 | case DECL_OUT: | |
3014 | attr = "INTENT (OUT)"; | |
3015 | break; | |
3016 | case DECL_INOUT: | |
3017 | attr = "INTENT (IN OUT)"; | |
3018 | break; | |
3019 | case DECL_INTRINSIC: | |
3020 | attr = "INTRINSIC"; | |
3021 | break; | |
3022 | case DECL_OPTIONAL: | |
3023 | attr = "OPTIONAL"; | |
3024 | break; | |
3025 | case DECL_PARAMETER: | |
3026 | attr = "PARAMETER"; | |
3027 | break; | |
3028 | case DECL_POINTER: | |
3029 | attr = "POINTER"; | |
3030 | break; | |
ee7e677f TB |
3031 | case DECL_PROTECTED: |
3032 | attr = "PROTECTED"; | |
3033 | break; | |
6de9cd9a DN |
3034 | case DECL_PRIVATE: |
3035 | attr = "PRIVATE"; | |
3036 | break; | |
3037 | case DECL_PUBLIC: | |
3038 | attr = "PUBLIC"; | |
3039 | break; | |
3040 | case DECL_SAVE: | |
3041 | attr = "SAVE"; | |
3042 | break; | |
3043 | case DECL_TARGET: | |
3044 | attr = "TARGET"; | |
3045 | break; | |
a8b3b0b6 CR |
3046 | case DECL_IS_BIND_C: |
3047 | attr = "IS_BIND_C"; | |
3048 | break; | |
3049 | case DECL_VALUE: | |
3050 | attr = "VALUE"; | |
3051 | break; | |
775e6c3a TB |
3052 | case DECL_VOLATILE: |
3053 | attr = "VOLATILE"; | |
3054 | break; | |
6de9cd9a | 3055 | default: |
66e4ab31 | 3056 | attr = NULL; /* This shouldn't happen. */ |
6de9cd9a DN |
3057 | } |
3058 | ||
3059 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
3060 | m = MATCH_ERROR; | |
3061 | goto cleanup; | |
3062 | } | |
3063 | ||
3064 | /* Now that we've dealt with duplicate attributes, add the attributes | |
3065 | to the current attribute. */ | |
3066 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3067 | { | |
3068 | if (seen[d] == 0) | |
3069 | continue; | |
3070 | ||
3071 | if (gfc_current_state () == COMP_DERIVED | |
3072 | && d != DECL_DIMENSION && d != DECL_POINTER | |
f2449db4 RS |
3073 | && d != DECL_PRIVATE && d != DECL_PUBLIC |
3074 | && d != DECL_NONE) | |
6de9cd9a | 3075 | { |
5046aff5 PT |
3076 | if (d == DECL_ALLOCATABLE) |
3077 | { | |
636dff67 SK |
3078 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
3079 | "attribute at %C in a TYPE definition") | |
d51347f9 | 3080 | == FAILURE) |
5046aff5 PT |
3081 | { |
3082 | m = MATCH_ERROR; | |
3083 | goto cleanup; | |
3084 | } | |
636dff67 SK |
3085 | } |
3086 | else | |
5046aff5 PT |
3087 | { |
3088 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
d51347f9 | 3089 | &seen_at[d]); |
5046aff5 PT |
3090 | m = MATCH_ERROR; |
3091 | goto cleanup; | |
3092 | } | |
6de9cd9a DN |
3093 | } |
3094 | ||
4213f93b | 3095 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
636dff67 | 3096 | && gfc_current_state () != COMP_MODULE) |
4213f93b PT |
3097 | { |
3098 | if (d == DECL_PRIVATE) | |
3099 | attr = "PRIVATE"; | |
3100 | else | |
3101 | attr = "PUBLIC"; | |
d51347f9 TB |
3102 | if (gfc_current_state () == COMP_DERIVED |
3103 | && gfc_state_stack->previous | |
3104 | && gfc_state_stack->previous->state == COMP_MODULE) | |
3105 | { | |
3106 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s " | |
3107 | "at %L in a TYPE definition", attr, | |
3108 | &seen_at[d]) | |
3109 | == FAILURE) | |
3110 | { | |
3111 | m = MATCH_ERROR; | |
3112 | goto cleanup; | |
3113 | } | |
3114 | } | |
3115 | else | |
3116 | { | |
3117 | gfc_error ("%s attribute at %L is not allowed outside of the " | |
3118 | "specification part of a module", attr, &seen_at[d]); | |
3119 | m = MATCH_ERROR; | |
3120 | goto cleanup; | |
3121 | } | |
4213f93b PT |
3122 | } |
3123 | ||
6de9cd9a DN |
3124 | switch (d) |
3125 | { | |
3126 | case DECL_ALLOCATABLE: | |
3127 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
3128 | break; | |
3129 | ||
3130 | case DECL_DIMENSION: | |
231b2fcc | 3131 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
3132 | break; |
3133 | ||
3134 | case DECL_EXTERNAL: | |
3135 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
3136 | break; | |
3137 | ||
3138 | case DECL_IN: | |
3139 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
3140 | break; | |
3141 | ||
3142 | case DECL_OUT: | |
3143 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
3144 | break; | |
3145 | ||
3146 | case DECL_INOUT: | |
3147 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
3148 | break; | |
3149 | ||
3150 | case DECL_INTRINSIC: | |
3151 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
3152 | break; | |
3153 | ||
3154 | case DECL_OPTIONAL: | |
3155 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
3156 | break; | |
3157 | ||
3158 | case DECL_PARAMETER: | |
231b2fcc | 3159 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
6de9cd9a DN |
3160 | break; |
3161 | ||
3162 | case DECL_POINTER: | |
3163 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
3164 | break; | |
3165 | ||
ee7e677f TB |
3166 | case DECL_PROTECTED: |
3167 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
3168 | { | |
3169 | gfc_error ("PROTECTED at %C only allowed in specification " | |
3170 | "part of a module"); | |
3171 | t = FAILURE; | |
3172 | break; | |
3173 | } | |
3174 | ||
636dff67 SK |
3175 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
3176 | "attribute at %C") | |
ee7e677f TB |
3177 | == FAILURE) |
3178 | t = FAILURE; | |
3179 | else | |
3180 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
3181 | break; | |
3182 | ||
6de9cd9a | 3183 | case DECL_PRIVATE: |
231b2fcc TS |
3184 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
3185 | &seen_at[d]); | |
6de9cd9a DN |
3186 | break; |
3187 | ||
3188 | case DECL_PUBLIC: | |
231b2fcc TS |
3189 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
3190 | &seen_at[d]); | |
6de9cd9a DN |
3191 | break; |
3192 | ||
3193 | case DECL_SAVE: | |
231b2fcc | 3194 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
3195 | break; |
3196 | ||
3197 | case DECL_TARGET: | |
3198 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
3199 | break; | |
3200 | ||
a8b3b0b6 CR |
3201 | case DECL_IS_BIND_C: |
3202 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); | |
3203 | break; | |
3204 | ||
06469efd | 3205 | case DECL_VALUE: |
636dff67 SK |
3206 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
3207 | "at %C") | |
06469efd PT |
3208 | == FAILURE) |
3209 | t = FAILURE; | |
3210 | else | |
3211 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
3212 | break; | |
3213 | ||
775e6c3a TB |
3214 | case DECL_VOLATILE: |
3215 | if (gfc_notify_std (GFC_STD_F2003, | |
636dff67 | 3216 | "Fortran 2003: VOLATILE attribute at %C") |
775e6c3a TB |
3217 | == FAILURE) |
3218 | t = FAILURE; | |
3219 | else | |
3220 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
3221 | break; | |
3222 | ||
6de9cd9a DN |
3223 | default: |
3224 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
3225 | } | |
3226 | ||
3227 | if (t == FAILURE) | |
3228 | { | |
3229 | m = MATCH_ERROR; | |
3230 | goto cleanup; | |
3231 | } | |
3232 | } | |
3233 | ||
3234 | colon_seen = 1; | |
3235 | return MATCH_YES; | |
3236 | ||
3237 | cleanup: | |
63645982 | 3238 | gfc_current_locus = start; |
6de9cd9a DN |
3239 | gfc_free_array_spec (current_as); |
3240 | current_as = NULL; | |
3241 | return m; | |
3242 | } | |
3243 | ||
3244 | ||
a8b3b0b6 CR |
3245 | /* Set the binding label, dest_label, either with the binding label |
3246 | stored in the given gfc_typespec, ts, or if none was provided, it | |
3247 | will be the symbol name in all lower case, as required by the draft | |
3248 | (J3/04-007, section 15.4.1). If a binding label was given and | |
3249 | there is more than one argument (num_idents), it is an error. */ | |
3250 | ||
17b1d2a0 | 3251 | gfc_try |
a8b3b0b6 CR |
3252 | set_binding_label (char *dest_label, const char *sym_name, int num_idents) |
3253 | { | |
ad4a2f64 | 3254 | if (num_idents > 1 && has_name_equals) |
a8b3b0b6 | 3255 | { |
ad4a2f64 TB |
3256 | gfc_error ("Multiple identifiers provided with " |
3257 | "single NAME= specifier at %C"); | |
3258 | return FAILURE; | |
3259 | } | |
a8b3b0b6 | 3260 | |
ad4a2f64 TB |
3261 | if (curr_binding_label[0] != '\0') |
3262 | { | |
a8b3b0b6 | 3263 | /* Binding label given; store in temp holder til have sym. */ |
c5b5a17a | 3264 | strcpy (dest_label, curr_binding_label); |
a8b3b0b6 CR |
3265 | } |
3266 | else | |
3267 | { | |
3268 | /* No binding label given, and the NAME= specifier did not exist, | |
3269 | which means there was no NAME="". */ | |
3270 | if (sym_name != NULL && has_name_equals == 0) | |
c5b5a17a | 3271 | strcpy (dest_label, sym_name); |
a8b3b0b6 CR |
3272 | } |
3273 | ||
3274 | return SUCCESS; | |
3275 | } | |
3276 | ||
3277 | ||
3278 | /* Set the status of the given common block as being BIND(C) or not, | |
3279 | depending on the given parameter, is_bind_c. */ | |
3280 | ||
3281 | void | |
3282 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) | |
3283 | { | |
3284 | com_block->is_bind_c = is_bind_c; | |
3285 | return; | |
3286 | } | |
3287 | ||
3288 | ||
3289 | /* Verify that the given gfc_typespec is for a C interoperable type. */ | |
3290 | ||
17b1d2a0 | 3291 | gfc_try |
a8b3b0b6 CR |
3292 | verify_c_interop (gfc_typespec *ts, const char *name, locus *where) |
3293 | { | |
17b1d2a0 | 3294 | gfc_try t; |
a8b3b0b6 CR |
3295 | |
3296 | /* Make sure the kind used is appropriate for the type. | |
3297 | The f90_type is unknown if an integer constant was | |
3298 | used (e.g., real(4), bind(c) :: myFloat). */ | |
3299 | if (ts->f90_type != BT_UNKNOWN) | |
3300 | { | |
3301 | t = gfc_validate_c_kind (ts); | |
3302 | if (t != SUCCESS) | |
3303 | { | |
3304 | /* Print an error, but continue parsing line. */ | |
3305 | gfc_error_now ("C kind parameter is for type %s but " | |
3306 | "symbol '%s' at %L is of type %s", | |
3307 | gfc_basic_typename (ts->f90_type), | |
3308 | name, where, | |
3309 | gfc_basic_typename (ts->type)); | |
3310 | } | |
3311 | } | |
3312 | ||
3313 | /* Make sure the kind is C interoperable. This does not care about the | |
3314 | possible error above. */ | |
3315 | if (ts->type == BT_DERIVED && ts->derived != NULL) | |
3316 | return (ts->derived->ts.is_c_interop ? SUCCESS : FAILURE); | |
3317 | else if (ts->is_c_interop != 1) | |
3318 | return FAILURE; | |
3319 | ||
3320 | return SUCCESS; | |
3321 | } | |
3322 | ||
3323 | ||
3324 | /* Verify that the variables of a given common block, which has been | |
3325 | defined with the attribute specifier bind(c), to be of a C | |
3326 | interoperable type. Errors will be reported here, if | |
3327 | encountered. */ | |
3328 | ||
17b1d2a0 | 3329 | gfc_try |
a8b3b0b6 CR |
3330 | verify_com_block_vars_c_interop (gfc_common_head *com_block) |
3331 | { | |
3332 | gfc_symbol *curr_sym = NULL; | |
17b1d2a0 | 3333 | gfc_try retval = SUCCESS; |
a8b3b0b6 CR |
3334 | |
3335 | curr_sym = com_block->head; | |
3336 | ||
3337 | /* Make sure we have at least one symbol. */ | |
3338 | if (curr_sym == NULL) | |
3339 | return retval; | |
3340 | ||
3341 | /* Here we know we have a symbol, so we'll execute this loop | |
3342 | at least once. */ | |
3343 | do | |
3344 | { | |
3345 | /* The second to last param, 1, says this is in a common block. */ | |
3346 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); | |
3347 | curr_sym = curr_sym->common_next; | |
3348 | } while (curr_sym != NULL); | |
3349 | ||
3350 | return retval; | |
3351 | } | |
3352 | ||
3353 | ||
3354 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, | |
3355 | an appropriate error message is reported. */ | |
3356 | ||
17b1d2a0 | 3357 | gfc_try |
a8b3b0b6 CR |
3358 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, |
3359 | int is_in_common, gfc_common_head *com_block) | |
3360 | { | |
17b1d2a0 | 3361 | gfc_try retval = SUCCESS; |
d8fa96e0 CR |
3362 | |
3363 | if (tmp_sym->attr.function && tmp_sym->result != NULL) | |
3364 | { | |
3365 | tmp_sym = tmp_sym->result; | |
3366 | /* Make sure it wasn't an implicitly typed result. */ | |
3367 | if (tmp_sym->attr.implicit_type) | |
3368 | { | |
3369 | gfc_warning ("Implicitly declared BIND(C) function '%s' at " | |
3370 | "%L may not be C interoperable", tmp_sym->name, | |
3371 | &tmp_sym->declared_at); | |
3372 | tmp_sym->ts.f90_type = tmp_sym->ts.type; | |
3373 | /* Mark it as C interoperable to prevent duplicate warnings. */ | |
3374 | tmp_sym->ts.is_c_interop = 1; | |
3375 | tmp_sym->attr.is_c_interop = 1; | |
3376 | } | |
3377 | } | |
a8b3b0b6 CR |
3378 | |
3379 | /* Here, we know we have the bind(c) attribute, so if we have | |
3380 | enough type info, then verify that it's a C interop kind. | |
3381 | The info could be in the symbol already, or possibly still in | |
3382 | the given ts (current_ts), so look in both. */ | |
3383 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) | |
3384 | { | |
3385 | if (verify_c_interop (&(tmp_sym->ts), tmp_sym->name, | |
3386 | &(tmp_sym->declared_at)) != SUCCESS) | |
3387 | { | |
3388 | /* See if we're dealing with a sym in a common block or not. */ | |
3389 | if (is_in_common == 1) | |
3390 | { | |
3391 | gfc_warning ("Variable '%s' in common block '%s' at %L " | |
3392 | "may not be a C interoperable " | |
3393 | "kind though common block '%s' is BIND(C)", | |
3394 | tmp_sym->name, com_block->name, | |
3395 | &(tmp_sym->declared_at), com_block->name); | |
3396 | } | |
3397 | else | |
3398 | { | |
3399 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) | |
3400 | gfc_error ("Type declaration '%s' at %L is not C " | |
3401 | "interoperable but it is BIND(C)", | |
3402 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3403 | else | |
3404 | gfc_warning ("Variable '%s' at %L " | |
3405 | "may not be a C interoperable " | |
3406 | "kind but it is bind(c)", | |
3407 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3408 | } | |
3409 | } | |
3410 | ||
3411 | /* Variables declared w/in a common block can't be bind(c) | |
3412 | since there's no way for C to see these variables, so there's | |
3413 | semantically no reason for the attribute. */ | |
3414 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) | |
3415 | { | |
3416 | gfc_error ("Variable '%s' in common block '%s' at " | |
3417 | "%L cannot be declared with BIND(C) " | |
3418 | "since it is not a global", | |
3419 | tmp_sym->name, com_block->name, | |
3420 | &(tmp_sym->declared_at)); | |
3421 | retval = FAILURE; | |
3422 | } | |
3423 | ||
3424 | /* Scalar variables that are bind(c) can not have the pointer | |
3425 | or allocatable attributes. */ | |
3426 | if (tmp_sym->attr.is_bind_c == 1) | |
3427 | { | |
3428 | if (tmp_sym->attr.pointer == 1) | |
3429 | { | |
3430 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3431 | "POINTER and BIND(C) attributes", | |
3432 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3433 | retval = FAILURE; | |
3434 | } | |
3435 | ||
3436 | if (tmp_sym->attr.allocatable == 1) | |
3437 | { | |
3438 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3439 | "ALLOCATABLE and BIND(C) attributes", | |
3440 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3441 | retval = FAILURE; | |
3442 | } | |
3443 | ||
3444 | /* If it is a BIND(C) function, make sure the return value is a | |
3445 | scalar value. The previous tests in this function made sure | |
3446 | the type is interoperable. */ | |
3447 | if (tmp_sym->attr.function == 1 && tmp_sym->as != NULL) | |
3448 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3449 | "be an array", tmp_sym->name, &(tmp_sym->declared_at)); | |
3450 | ||
3451 | /* BIND(C) functions can not return a character string. */ | |
3452 | if (tmp_sym->attr.function == 1 && tmp_sym->ts.type == BT_CHARACTER) | |
3453 | if (tmp_sym->ts.cl == NULL || tmp_sym->ts.cl->length == NULL | |
3454 | || tmp_sym->ts.cl->length->expr_type != EXPR_CONSTANT | |
3455 | || mpz_cmp_si (tmp_sym->ts.cl->length->value.integer, 1) != 0) | |
3456 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3457 | "be a character string", tmp_sym->name, | |
3458 | &(tmp_sym->declared_at)); | |
3459 | } | |
3460 | } | |
3461 | ||
3462 | /* See if the symbol has been marked as private. If it has, make sure | |
3463 | there is no binding label and warn the user if there is one. */ | |
3464 | if (tmp_sym->attr.access == ACCESS_PRIVATE | |
3465 | && tmp_sym->binding_label[0] != '\0') | |
3466 | /* Use gfc_warning_now because we won't say that the symbol fails | |
3467 | just because of this. */ | |
3468 | gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " | |
3469 | "given the binding label '%s'", tmp_sym->name, | |
3470 | &(tmp_sym->declared_at), tmp_sym->binding_label); | |
3471 | ||
3472 | return retval; | |
3473 | } | |
3474 | ||
3475 | ||
3476 | /* Set the appropriate fields for a symbol that's been declared as | |
3477 | BIND(C) (the is_bind_c flag and the binding label), and verify that | |
3478 | the type is C interoperable. Errors are reported by the functions | |
3479 | used to set/test these fields. */ | |
3480 | ||
17b1d2a0 | 3481 | gfc_try |
a8b3b0b6 CR |
3482 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) |
3483 | { | |
17b1d2a0 | 3484 | gfc_try retval = SUCCESS; |
a8b3b0b6 CR |
3485 | |
3486 | /* TODO: Do we need to make sure the vars aren't marked private? */ | |
3487 | ||
3488 | /* Set the is_bind_c bit in symbol_attribute. */ | |
3489 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); | |
3490 | ||
3491 | if (set_binding_label (tmp_sym->binding_label, tmp_sym->name, | |
3492 | num_idents) != SUCCESS) | |
3493 | return FAILURE; | |
3494 | ||
3495 | return retval; | |
3496 | } | |
3497 | ||
3498 | ||
3499 | /* Set the fields marking the given common block as BIND(C), including | |
3500 | a binding label, and report any errors encountered. */ | |
3501 | ||
17b1d2a0 | 3502 | gfc_try |
a8b3b0b6 CR |
3503 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) |
3504 | { | |
17b1d2a0 | 3505 | gfc_try retval = SUCCESS; |
a8b3b0b6 CR |
3506 | |
3507 | /* destLabel, common name, typespec (which may have binding label). */ | |
3508 | if (set_binding_label (com_block->binding_label, com_block->name, num_idents) | |
3509 | != SUCCESS) | |
3510 | return FAILURE; | |
3511 | ||
3512 | /* Set the given common block (com_block) to being bind(c) (1). */ | |
3513 | set_com_block_bind_c (com_block, 1); | |
3514 | ||
3515 | return retval; | |
3516 | } | |
3517 | ||
3518 | ||
3519 | /* Retrieve the list of one or more identifiers that the given bind(c) | |
3520 | attribute applies to. */ | |
3521 | ||
17b1d2a0 | 3522 | gfc_try |
a8b3b0b6 CR |
3523 | get_bind_c_idents (void) |
3524 | { | |
3525 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3526 | int num_idents = 0; | |
3527 | gfc_symbol *tmp_sym = NULL; | |
3528 | match found_id; | |
3529 | gfc_common_head *com_block = NULL; | |
3530 | ||
3531 | if (gfc_match_name (name) == MATCH_YES) | |
3532 | { | |
3533 | found_id = MATCH_YES; | |
3534 | gfc_get_ha_symbol (name, &tmp_sym); | |
3535 | } | |
3536 | else if (match_common_name (name) == MATCH_YES) | |
3537 | { | |
3538 | found_id = MATCH_YES; | |
3539 | com_block = gfc_get_common (name, 0); | |
3540 | } | |
3541 | else | |
3542 | { | |
3543 | gfc_error ("Need either entity or common block name for " | |
3544 | "attribute specification statement at %C"); | |
3545 | return FAILURE; | |
3546 | } | |
3547 | ||
3548 | /* Save the current identifier and look for more. */ | |
3549 | do | |
3550 | { | |
3551 | /* Increment the number of identifiers found for this spec stmt. */ | |
3552 | num_idents++; | |
3553 | ||
3554 | /* Make sure we have a sym or com block, and verify that it can | |
3555 | be bind(c). Set the appropriate field(s) and look for more | |
3556 | identifiers. */ | |
3557 | if (tmp_sym != NULL || com_block != NULL) | |
3558 | { | |
3559 | if (tmp_sym != NULL) | |
3560 | { | |
3561 | if (set_verify_bind_c_sym (tmp_sym, num_idents) | |
3562 | != SUCCESS) | |
3563 | return FAILURE; | |
3564 | } | |
3565 | else | |
3566 | { | |
3567 | if (set_verify_bind_c_com_block(com_block, num_idents) | |
3568 | != SUCCESS) | |
3569 | return FAILURE; | |
3570 | } | |
3571 | ||
3572 | /* Look to see if we have another identifier. */ | |
3573 | tmp_sym = NULL; | |
3574 | if (gfc_match_eos () == MATCH_YES) | |
3575 | found_id = MATCH_NO; | |
3576 | else if (gfc_match_char (',') != MATCH_YES) | |
3577 | found_id = MATCH_NO; | |
3578 | else if (gfc_match_name (name) == MATCH_YES) | |
3579 | { | |
3580 | found_id = MATCH_YES; | |
3581 | gfc_get_ha_symbol (name, &tmp_sym); | |
3582 | } | |
3583 | else if (match_common_name (name) == MATCH_YES) | |
3584 | { | |
3585 | found_id = MATCH_YES; | |
3586 | com_block = gfc_get_common (name, 0); | |
3587 | } | |
3588 | else | |
3589 | { | |
3590 | gfc_error ("Missing entity or common block name for " | |
3591 | "attribute specification statement at %C"); | |
3592 | return FAILURE; | |
3593 | } | |
3594 | } | |
3595 | else | |
3596 | { | |
3597 | gfc_internal_error ("Missing symbol"); | |
3598 | } | |
3599 | } while (found_id == MATCH_YES); | |
3600 | ||
3601 | /* if we get here we were successful */ | |
3602 | return SUCCESS; | |
3603 | } | |
3604 | ||
3605 | ||
3606 | /* Try and match a BIND(C) attribute specification statement. */ | |
3607 | ||
3608 | match | |
3609 | gfc_match_bind_c_stmt (void) | |
3610 | { | |
3611 | match found_match = MATCH_NO; | |
3612 | gfc_typespec *ts; | |
3613 | ||
3614 | ts = ¤t_ts; | |
3615 | ||
3616 | /* This may not be necessary. */ | |
3617 | gfc_clear_ts (ts); | |
3618 | /* Clear the temporary binding label holder. */ | |
3619 | curr_binding_label[0] = '\0'; | |
3620 | ||
3621 | /* Look for the bind(c). */ | |
1eabf70a | 3622 | found_match = gfc_match_bind_c (NULL, true); |
a8b3b0b6 CR |
3623 | |
3624 | if (found_match == MATCH_YES) | |
3625 | { | |
3626 | /* Look for the :: now, but it is not required. */ | |
3627 | gfc_match (" :: "); | |
3628 | ||
3629 | /* Get the identifier(s) that needs to be updated. This may need to | |
3630 | change to hand the flag(s) for the attr specified so all identifiers | |
3631 | found can have all appropriate parts updated (assuming that the same | |
3632 | spec stmt can have multiple attrs, such as both bind(c) and | |
3633 | allocatable...). */ | |
3634 | if (get_bind_c_idents () != SUCCESS) | |
3635 | /* Error message should have printed already. */ | |
3636 | return MATCH_ERROR; | |
3637 | } | |
3638 | ||
3639 | return found_match; | |
3640 | } | |
3641 | ||
3642 | ||
6de9cd9a DN |
3643 | /* Match a data declaration statement. */ |
3644 | ||
3645 | match | |
3646 | gfc_match_data_decl (void) | |
3647 | { | |
3648 | gfc_symbol *sym; | |
3649 | match m; | |
949d5b72 | 3650 | int elem; |
6de9cd9a | 3651 | |
a8b3b0b6 CR |
3652 | num_idents_on_line = 0; |
3653 | ||
e2d29968 | 3654 | m = gfc_match_type_spec (¤t_ts, 0); |
6de9cd9a DN |
3655 | if (m != MATCH_YES) |
3656 | return m; | |
3657 | ||
3658 | if (current_ts.type == BT_DERIVED && gfc_current_state () != COMP_DERIVED) | |
3659 | { | |
3660 | sym = gfc_use_derived (current_ts.derived); | |
3661 | ||
3662 | if (sym == NULL) | |
3663 | { | |
3664 | m = MATCH_ERROR; | |
3665 | goto cleanup; | |
3666 | } | |
3667 | ||
3668 | current_ts.derived = sym; | |
3669 | } | |
3670 | ||
3671 | m = match_attr_spec (); | |
3672 | if (m == MATCH_ERROR) | |
3673 | { | |
3674 | m = MATCH_NO; | |
3675 | goto cleanup; | |
3676 | } | |
3677 | ||
9fa6b0af FXC |
3678 | if (current_ts.type == BT_DERIVED && current_ts.derived->components == NULL |
3679 | && !current_ts.derived->attr.zero_comp) | |
6de9cd9a DN |
3680 | { |
3681 | ||
3682 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
3683 | goto ok; | |
3684 | ||
976e21f6 | 3685 | gfc_find_symbol (current_ts.derived->name, |
636dff67 | 3686 | current_ts.derived->ns->parent, 1, &sym); |
6de9cd9a | 3687 | |
976e21f6 | 3688 | /* Any symbol that we find had better be a type definition |
636dff67 | 3689 | which has its components defined. */ |
976e21f6 | 3690 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
9fa6b0af FXC |
3691 | && (current_ts.derived->components != NULL |
3692 | || current_ts.derived->attr.zero_comp)) | |
6de9cd9a DN |
3693 | goto ok; |
3694 | ||
976e21f6 PT |
3695 | /* Now we have an error, which we signal, and then fix up |
3696 | because the knock-on is plain and simple confusing. */ | |
3697 | gfc_error_now ("Derived type at %C has not been previously defined " | |
636dff67 | 3698 | "and so cannot appear in a derived type definition"); |
976e21f6 PT |
3699 | current_attr.pointer = 1; |
3700 | goto ok; | |
6de9cd9a DN |
3701 | } |
3702 | ||
3703 | ok: | |
3704 | /* If we have an old-style character declaration, and no new-style | |
3705 | attribute specifications, then there a comma is optional between | |
3706 | the type specification and the variable list. */ | |
3707 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
3708 | gfc_match_char (','); | |
3709 | ||
949d5b72 PT |
3710 | /* Give the types/attributes to symbols that follow. Give the element |
3711 | a number so that repeat character length expressions can be copied. */ | |
3712 | elem = 1; | |
6de9cd9a DN |
3713 | for (;;) |
3714 | { | |
a8b3b0b6 | 3715 | num_idents_on_line++; |
949d5b72 | 3716 | m = variable_decl (elem++); |
6de9cd9a DN |
3717 | if (m == MATCH_ERROR) |
3718 | goto cleanup; | |
3719 | if (m == MATCH_NO) | |
3720 | break; | |
3721 | ||
3722 | if (gfc_match_eos () == MATCH_YES) | |
3723 | goto cleanup; | |
3724 | if (gfc_match_char (',') != MATCH_YES) | |
3725 | break; | |
3726 | } | |
3727 | ||
8f81c3c6 PT |
3728 | if (gfc_error_flag_test () == 0) |
3729 | gfc_error ("Syntax error in data declaration at %C"); | |
6de9cd9a DN |
3730 | m = MATCH_ERROR; |
3731 | ||
a9f6f1f2 JD |
3732 | gfc_free_data_all (gfc_current_ns); |
3733 | ||
6de9cd9a DN |
3734 | cleanup: |
3735 | gfc_free_array_spec (current_as); | |
3736 | current_as = NULL; | |
3737 | return m; | |
3738 | } | |
3739 | ||
3740 | ||
3741 | /* Match a prefix associated with a function or subroutine | |
3742 | declaration. If the typespec pointer is nonnull, then a typespec | |
3743 | can be matched. Note that if nothing matches, MATCH_YES is | |
3744 | returned (the null string was matched). */ | |
3745 | ||
1c8bcdf7 PT |
3746 | match |
3747 | gfc_match_prefix (gfc_typespec *ts) | |
6de9cd9a | 3748 | { |
7389bce6 | 3749 | bool seen_type; |
6de9cd9a DN |
3750 | |
3751 | gfc_clear_attr (¤t_attr); | |
3752 | seen_type = 0; | |
3753 | ||
3754 | loop: | |
3755 | if (!seen_type && ts != NULL | |
e2d29968 | 3756 | && gfc_match_type_spec (ts, 0) == MATCH_YES |
6de9cd9a DN |
3757 | && gfc_match_space () == MATCH_YES) |
3758 | { | |
3759 | ||
3760 | seen_type = 1; | |
3761 | goto loop; | |
3762 | } | |
3763 | ||
3764 | if (gfc_match ("elemental% ") == MATCH_YES) | |
3765 | { | |
3766 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
3767 | return MATCH_ERROR; | |
3768 | ||
3769 | goto loop; | |
3770 | } | |
3771 | ||
3772 | if (gfc_match ("pure% ") == MATCH_YES) | |
3773 | { | |
3774 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
3775 | return MATCH_ERROR; | |
3776 | ||
3777 | goto loop; | |
3778 | } | |
3779 | ||
3780 | if (gfc_match ("recursive% ") == MATCH_YES) | |
3781 | { | |
3782 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
3783 | return MATCH_ERROR; | |
3784 | ||
3785 | goto loop; | |
3786 | } | |
3787 | ||
3788 | /* At this point, the next item is not a prefix. */ | |
3789 | return MATCH_YES; | |
3790 | } | |
3791 | ||
3792 | ||
1c8bcdf7 | 3793 | /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */ |
6de9cd9a | 3794 | |
17b1d2a0 | 3795 | static gfc_try |
636dff67 | 3796 | copy_prefix (symbol_attribute *dest, locus *where) |
6de9cd9a | 3797 | { |
6de9cd9a DN |
3798 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
3799 | return FAILURE; | |
3800 | ||
3801 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
3802 | return FAILURE; | |
3803 | ||
3804 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
3805 | return FAILURE; | |
3806 | ||
3807 | return SUCCESS; | |
3808 | } | |
3809 | ||
3810 | ||
3811 | /* Match a formal argument list. */ | |
3812 | ||
3813 | match | |
636dff67 | 3814 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
6de9cd9a DN |
3815 | { |
3816 | gfc_formal_arglist *head, *tail, *p, *q; | |
3817 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3818 | gfc_symbol *sym; | |
3819 | match m; | |
3820 | ||
3821 | head = tail = NULL; | |
3822 | ||
3823 | if (gfc_match_char ('(') != MATCH_YES) | |
3824 | { | |
3825 | if (null_flag) | |
3826 | goto ok; | |
3827 | return MATCH_NO; | |
3828 | } | |
3829 | ||
3830 | if (gfc_match_char (')') == MATCH_YES) | |
3831 | goto ok; | |
3832 | ||
3833 | for (;;) | |
3834 | { | |
3835 | if (gfc_match_char ('*') == MATCH_YES) | |
3836 | sym = NULL; | |
3837 | else | |
3838 | { | |
3839 | m = gfc_match_name (name); | |
3840 | if (m != MATCH_YES) | |
3841 | goto cleanup; | |
3842 | ||
3843 | if (gfc_get_symbol (name, NULL, &sym)) | |
3844 | goto cleanup; | |
3845 | } | |
3846 | ||
3847 | p = gfc_get_formal_arglist (); | |
3848 | ||
3849 | if (head == NULL) | |
3850 | head = tail = p; | |
3851 | else | |
3852 | { | |
3853 | tail->next = p; | |
3854 | tail = p; | |
3855 | } | |
3856 | ||
3857 | tail->sym = sym; | |
3858 | ||
3859 | /* We don't add the VARIABLE flavor because the name could be a | |
636dff67 SK |
3860 | dummy procedure. We don't apply these attributes to formal |
3861 | arguments of statement functions. */ | |
6de9cd9a | 3862 | if (sym != NULL && !st_flag |
231b2fcc | 3863 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
6de9cd9a DN |
3864 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
3865 | { | |
3866 | m = MATCH_ERROR; | |
3867 | goto cleanup; | |
3868 | } | |
3869 | ||
3870 | /* The name of a program unit can be in a different namespace, | |
636dff67 SK |
3871 | so check for it explicitly. After the statement is accepted, |
3872 | the name is checked for especially in gfc_get_symbol(). */ | |
6de9cd9a DN |
3873 | if (gfc_new_block != NULL && sym != NULL |
3874 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
3875 | { | |
3876 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
3877 | sym->name); | |
3878 | m = MATCH_ERROR; | |
3879 | goto cleanup; | |
3880 | } | |
3881 | ||
3882 | if (gfc_match_char (')') == MATCH_YES) | |
3883 | goto ok; | |
3884 | ||
3885 | m = gfc_match_char (','); | |
3886 | if (m != MATCH_YES) | |
3887 | { | |
3888 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
3889 | goto cleanup; | |
3890 | } | |
3891 | } | |
3892 | ||
3893 | ok: | |
3894 | /* Check for duplicate symbols in the formal argument list. */ | |
3895 | if (head != NULL) | |
3896 | { | |
3897 | for (p = head; p->next; p = p->next) | |
3898 | { | |
3899 | if (p->sym == NULL) | |
3900 | continue; | |
3901 | ||
3902 | for (q = p->next; q; q = q->next) | |
3903 | if (p->sym == q->sym) | |
3904 | { | |
636dff67 SK |
3905 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
3906 | "at %C", p->sym->name); | |
6de9cd9a DN |
3907 | |
3908 | m = MATCH_ERROR; | |
3909 | goto cleanup; | |
3910 | } | |
3911 | } | |
3912 | } | |
3913 | ||
66e4ab31 SK |
3914 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) |
3915 | == FAILURE) | |
6de9cd9a DN |
3916 | { |
3917 | m = MATCH_ERROR; | |
3918 | goto cleanup; | |
3919 | } | |
3920 | ||
3921 | return MATCH_YES; | |
3922 | ||
3923 | cleanup: | |
3924 | gfc_free_formal_arglist (head); | |
3925 | return m; | |
3926 | } | |
3927 | ||
3928 | ||
3929 | /* Match a RESULT specification following a function declaration or | |
3930 | ENTRY statement. Also matches the end-of-statement. */ | |
3931 | ||
3932 | static match | |
66e4ab31 | 3933 | match_result (gfc_symbol *function, gfc_symbol **result) |
6de9cd9a DN |
3934 | { |
3935 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3936 | gfc_symbol *r; | |
3937 | match m; | |
3938 | ||
3939 | if (gfc_match (" result (") != MATCH_YES) | |
3940 | return MATCH_NO; | |
3941 | ||
3942 | m = gfc_match_name (name); | |
3943 | if (m != MATCH_YES) | |
3944 | return m; | |
3945 | ||
a8b3b0b6 CR |
3946 | /* Get the right paren, and that's it because there could be the |
3947 | bind(c) attribute after the result clause. */ | |
3948 | if (gfc_match_char(')') != MATCH_YES) | |
6de9cd9a | 3949 | { |
a8b3b0b6 | 3950 | /* TODO: should report the missing right paren here. */ |
6de9cd9a DN |
3951 | return MATCH_ERROR; |
3952 | } | |
3953 | ||
3954 | if (strcmp (function->name, name) == 0) | |
3955 | { | |
636dff67 | 3956 | gfc_error ("RESULT variable at %C must be different than function name"); |
6de9cd9a DN |
3957 | return MATCH_ERROR; |
3958 | } | |
3959 | ||
3960 | if (gfc_get_symbol (name, NULL, &r)) | |
3961 | return MATCH_ERROR; | |
3962 | ||
231b2fcc TS |
3963 | if (gfc_add_flavor (&r->attr, FL_VARIABLE, r->name, NULL) == FAILURE |
3964 | || gfc_add_result (&r->attr, r->name, NULL) == FAILURE) | |
6de9cd9a DN |
3965 | return MATCH_ERROR; |
3966 | ||
3967 | *result = r; | |
3968 | ||
3969 | return MATCH_YES; | |
3970 | } | |
3971 | ||
3972 | ||
a8b3b0b6 CR |
3973 | /* Match a function suffix, which could be a combination of a result |
3974 | clause and BIND(C), either one, or neither. The draft does not | |
3975 | require them to come in a specific order. */ | |
3976 | ||
3977 | match | |
3978 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) | |
3979 | { | |
3980 | match is_bind_c; /* Found bind(c). */ | |
3981 | match is_result; /* Found result clause. */ | |
3982 | match found_match; /* Status of whether we've found a good match. */ | |
8fc541d3 | 3983 | char peek_char; /* Character we're going to peek at. */ |
1eabf70a | 3984 | bool allow_binding_name; |
a8b3b0b6 CR |
3985 | |
3986 | /* Initialize to having found nothing. */ | |
3987 | found_match = MATCH_NO; | |
3988 | is_bind_c = MATCH_NO; | |
3989 | is_result = MATCH_NO; | |
3990 | ||
3991 | /* Get the next char to narrow between result and bind(c). */ | |
3992 | gfc_gobble_whitespace (); | |
8fc541d3 | 3993 | peek_char = gfc_peek_ascii_char (); |
a8b3b0b6 | 3994 | |
1eabf70a TB |
3995 | /* C binding names are not allowed for internal procedures. */ |
3996 | if (gfc_current_state () == COMP_CONTAINS | |
3997 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
3998 | allow_binding_name = false; | |
3999 | else | |
4000 | allow_binding_name = true; | |
4001 | ||
a8b3b0b6 CR |
4002 | switch (peek_char) |
4003 | { | |
4004 | case 'r': | |
4005 | /* Look for result clause. */ | |
4006 | is_result = match_result (sym, result); | |
4007 | if (is_result == MATCH_YES) | |
4008 | { | |
4009 | /* Now see if there is a bind(c) after it. */ | |
1eabf70a | 4010 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
a8b3b0b6 CR |
4011 | /* We've found the result clause and possibly bind(c). */ |
4012 | found_match = MATCH_YES; | |
4013 | } | |
4014 | else | |
4015 | /* This should only be MATCH_ERROR. */ | |
4016 | found_match = is_result; | |
4017 | break; | |
4018 | case 'b': | |
4019 | /* Look for bind(c) first. */ | |
1eabf70a | 4020 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
a8b3b0b6 CR |
4021 | if (is_bind_c == MATCH_YES) |
4022 | { | |
4023 | /* Now see if a result clause followed it. */ | |
4024 | is_result = match_result (sym, result); | |
4025 | found_match = MATCH_YES; | |
4026 | } | |
4027 | else | |
4028 | { | |
4029 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ | |
4030 | found_match = MATCH_ERROR; | |
4031 | } | |
4032 | break; | |
4033 | default: | |
4034 | gfc_error ("Unexpected junk after function declaration at %C"); | |
4035 | found_match = MATCH_ERROR; | |
4036 | break; | |
4037 | } | |
4038 | ||
a8b3b0b6 | 4039 | if (is_bind_c == MATCH_YES) |
01f4fff1 | 4040 | { |
1eabf70a | 4041 | /* Fortran 2008 draft allows BIND(C) for internal procedures. */ |
01f4fff1 | 4042 | if (gfc_current_state () == COMP_CONTAINS |
1eabf70a | 4043 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
fdc54e88 FXC |
4044 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
4045 | "at %L may not be specified for an internal " | |
4046 | "procedure", &gfc_current_locus) | |
1eabf70a TB |
4047 | == FAILURE) |
4048 | return MATCH_ERROR; | |
4049 | ||
01f4fff1 TB |
4050 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) |
4051 | == FAILURE) | |
4052 | return MATCH_ERROR; | |
4053 | } | |
a8b3b0b6 CR |
4054 | |
4055 | return found_match; | |
4056 | } | |
4057 | ||
4058 | ||
69773742 JW |
4059 | /* Match a PROCEDURE declaration (R1211). */ |
4060 | ||
4061 | static match | |
4062 | match_procedure_decl (void) | |
4063 | { | |
4064 | match m; | |
4065 | locus old_loc, entry_loc; | |
4066 | gfc_symbol *sym, *proc_if = NULL; | |
4067 | int num; | |
8fb74da4 | 4068 | gfc_expr *initializer = NULL; |
69773742 JW |
4069 | |
4070 | old_loc = entry_loc = gfc_current_locus; | |
4071 | ||
4072 | gfc_clear_ts (¤t_ts); | |
4073 | ||
4074 | if (gfc_match (" (") != MATCH_YES) | |
4075 | { | |
4076 | gfc_current_locus = entry_loc; | |
4077 | return MATCH_NO; | |
4078 | } | |
4079 | ||
4080 | /* Get the type spec. for the procedure interface. */ | |
4081 | old_loc = gfc_current_locus; | |
e2d29968 | 4082 | m = gfc_match_type_spec (¤t_ts, 0); |
8fc541d3 | 4083 | if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')')) |
69773742 JW |
4084 | goto got_ts; |
4085 | ||
4086 | if (m == MATCH_ERROR) | |
4087 | return m; | |
4088 | ||
4089 | gfc_current_locus = old_loc; | |
4090 | ||
4091 | /* Get the name of the procedure or abstract interface | |
4092 | to inherit the interface from. */ | |
4093 | m = gfc_match_symbol (&proc_if, 1); | |
4094 | ||
4095 | if (m == MATCH_NO) | |
4096 | goto syntax; | |
4097 | else if (m == MATCH_ERROR) | |
4098 | return m; | |
4099 | ||
4100 | /* Various interface checks. */ | |
4101 | if (proc_if) | |
4102 | { | |
bb343a6c TB |
4103 | /* Resolve interface if possible. That way, attr.procedure is only set |
4104 | if it is declared by a later procedure-declaration-stmt, which is | |
4105 | invalid per C1212. */ | |
32d99e68 JW |
4106 | while (proc_if->ts.interface) |
4107 | proc_if = proc_if->ts.interface; | |
bb343a6c | 4108 | |
69773742 JW |
4109 | if (proc_if->generic) |
4110 | { | |
4111 | gfc_error ("Interface '%s' at %C may not be generic", proc_if->name); | |
4112 | return MATCH_ERROR; | |
4113 | } | |
4114 | if (proc_if->attr.proc == PROC_ST_FUNCTION) | |
4115 | { | |
4116 | gfc_error ("Interface '%s' at %C may not be a statement function", | |
4117 | proc_if->name); | |
4118 | return MATCH_ERROR; | |
4119 | } | |
4120 | /* Handle intrinsic procedures. */ | |
c1db9545 JW |
4121 | if (!(proc_if->attr.external || proc_if->attr.use_assoc |
4122 | || proc_if->attr.if_source == IFSRC_IFBODY) | |
c3005b0f DK |
4123 | && (gfc_is_intrinsic (proc_if, 0, gfc_current_locus) |
4124 | || gfc_is_intrinsic (proc_if, 1, gfc_current_locus))) | |
69773742 JW |
4125 | proc_if->attr.intrinsic = 1; |
4126 | if (proc_if->attr.intrinsic | |
4127 | && !gfc_intrinsic_actual_ok (proc_if->name, 0)) | |
4128 | { | |
4129 | gfc_error ("Intrinsic procedure '%s' not allowed " | |
4130 | "in PROCEDURE statement at %C", proc_if->name); | |
4131 | return MATCH_ERROR; | |
4132 | } | |
69773742 JW |
4133 | } |
4134 | ||
4135 | got_ts: | |
69773742 JW |
4136 | if (gfc_match (" )") != MATCH_YES) |
4137 | { | |
4138 | gfc_current_locus = entry_loc; | |
4139 | return MATCH_NO; | |
4140 | } | |
4141 | ||
4142 | /* Parse attributes. */ | |
4143 | m = match_attr_spec(); | |
4144 | if (m == MATCH_ERROR) | |
4145 | return MATCH_ERROR; | |
4146 | ||
4147 | /* Get procedure symbols. */ | |
4148 | for(num=1;;num++) | |
4149 | { | |
69773742 JW |
4150 | m = gfc_match_symbol (&sym, 0); |
4151 | if (m == MATCH_NO) | |
4152 | goto syntax; | |
4153 | else if (m == MATCH_ERROR) | |
4154 | return m; | |
4155 | ||
4156 | /* Add current_attr to the symbol attributes. */ | |
4157 | if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
4158 | return MATCH_ERROR; | |
4159 | ||
4160 | if (sym->attr.is_bind_c) | |
4161 | { | |
4162 | /* Check for C1218. */ | |
4163 | if (!proc_if || !proc_if->attr.is_bind_c) | |
4164 | { | |
4165 | gfc_error ("BIND(C) attribute at %C requires " | |
4166 | "an interface with BIND(C)"); | |
4167 | return MATCH_ERROR; | |
4168 | } | |
4169 | /* Check for C1217. */ | |
4170 | if (has_name_equals && sym->attr.pointer) | |
4171 | { | |
4172 | gfc_error ("BIND(C) procedure with NAME may not have " | |
4173 | "POINTER attribute at %C"); | |
4174 | return MATCH_ERROR; | |
4175 | } | |
4176 | if (has_name_equals && sym->attr.dummy) | |
4177 | { | |
4178 | gfc_error ("Dummy procedure at %C may not have " | |
4179 | "BIND(C) attribute with NAME"); | |
4180 | return MATCH_ERROR; | |
4181 | } | |
4182 | /* Set binding label for BIND(C). */ | |
4183 | if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS) | |
4184 | return MATCH_ERROR; | |
4185 | } | |
4186 | ||
8fb74da4 | 4187 | if (gfc_add_external (&sym->attr, NULL) == FAILURE) |
69773742 JW |
4188 | return MATCH_ERROR; |
4189 | if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE) | |
4190 | return MATCH_ERROR; | |
4191 | ||
4192 | /* Set interface. */ | |
4193 | if (proc_if != NULL) | |
6cc309c9 | 4194 | { |
32d99e68 | 4195 | sym->ts.interface = proc_if; |
6cc309c9 JD |
4196 | sym->attr.untyped = 1; |
4197 | } | |
69773742 JW |
4198 | else if (current_ts.type != BT_UNKNOWN) |
4199 | { | |
32d99e68 JW |
4200 | sym->ts = current_ts; |
4201 | sym->ts.interface = gfc_new_symbol ("", gfc_current_ns); | |
4202 | sym->ts.interface->ts = current_ts; | |
4203 | sym->ts.interface->attr.function = 1; | |
4204 | sym->attr.function = sym->ts.interface->attr.function; | |
69773742 JW |
4205 | } |
4206 | ||
8fb74da4 JW |
4207 | if (gfc_match (" =>") == MATCH_YES) |
4208 | { | |
4209 | if (!current_attr.pointer) | |
4210 | { | |
4211 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
4212 | m = MATCH_ERROR; | |
4213 | goto cleanup; | |
4214 | } | |
4215 | ||
4216 | m = gfc_match_null (&initializer); | |
4217 | if (m == MATCH_NO) | |
4218 | { | |
4219 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4220 | m = MATCH_ERROR; | |
4221 | } | |
4222 | ||
4223 | if (gfc_pure (NULL)) | |
4224 | { | |
4225 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4226 | "a PURE procedure"); | |
4227 | m = MATCH_ERROR; | |
4228 | } | |
4229 | ||
4230 | if (m != MATCH_YES) | |
4231 | goto cleanup; | |
4232 | ||
4233 | if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus) | |
4234 | != SUCCESS) | |
4235 | goto cleanup; | |
4236 | ||
4237 | } | |
4238 | ||
4239 | gfc_set_sym_referenced (sym); | |
4240 | ||
69773742 JW |
4241 | if (gfc_match_eos () == MATCH_YES) |
4242 | return MATCH_YES; | |
4243 | if (gfc_match_char (',') != MATCH_YES) | |
4244 | goto syntax; | |
4245 | } | |
4246 | ||
4247 | syntax: | |
4248 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4249 | return MATCH_ERROR; | |
8fb74da4 JW |
4250 | |
4251 | cleanup: | |
4252 | /* Free stuff up and return. */ | |
4253 | gfc_free_expr (initializer); | |
4254 | return m; | |
69773742 JW |
4255 | } |
4256 | ||
4257 | ||
4258 | /* Match a PROCEDURE declaration inside an interface (R1206). */ | |
4259 | ||
4260 | static match | |
4261 | match_procedure_in_interface (void) | |
4262 | { | |
4263 | match m; | |
4264 | gfc_symbol *sym; | |
4265 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4266 | ||
4267 | if (current_interface.type == INTERFACE_NAMELESS | |
4268 | || current_interface.type == INTERFACE_ABSTRACT) | |
4269 | { | |
4270 | gfc_error ("PROCEDURE at %C must be in a generic interface"); | |
4271 | return MATCH_ERROR; | |
4272 | } | |
4273 | ||
4274 | for(;;) | |
4275 | { | |
4276 | m = gfc_match_name (name); | |
4277 | if (m == MATCH_NO) | |
4278 | goto syntax; | |
4279 | else if (m == MATCH_ERROR) | |
4280 | return m; | |
4281 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
4282 | return MATCH_ERROR; | |
4283 | ||
4284 | if (gfc_add_interface (sym) == FAILURE) | |
4285 | return MATCH_ERROR; | |
4286 | ||
69773742 JW |
4287 | if (gfc_match_eos () == MATCH_YES) |
4288 | break; | |
4289 | if (gfc_match_char (',') != MATCH_YES) | |
4290 | goto syntax; | |
4291 | } | |
4292 | ||
4293 | return MATCH_YES; | |
4294 | ||
4295 | syntax: | |
4296 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4297 | return MATCH_ERROR; | |
4298 | } | |
4299 | ||
4300 | ||
4301 | /* General matcher for PROCEDURE declarations. */ | |
4302 | ||
4303 | match | |
4304 | gfc_match_procedure (void) | |
4305 | { | |
4306 | match m; | |
4307 | ||
4308 | switch (gfc_current_state ()) | |
4309 | { | |
4310 | case COMP_NONE: | |
4311 | case COMP_PROGRAM: | |
4312 | case COMP_MODULE: | |
4313 | case COMP_SUBROUTINE: | |
4314 | case COMP_FUNCTION: | |
4315 | m = match_procedure_decl (); | |
4316 | break; | |
4317 | case COMP_INTERFACE: | |
4318 | m = match_procedure_in_interface (); | |
4319 | break; | |
4320 | case COMP_DERIVED: | |
4321 | gfc_error ("Fortran 2003: Procedure components at %C are " | |
4322 | "not yet implemented in gfortran"); | |
4323 | return MATCH_ERROR; | |
4324 | default: | |
4325 | return MATCH_NO; | |
4326 | } | |
4327 | ||
4328 | if (m != MATCH_YES) | |
4329 | return m; | |
4330 | ||
4331 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C") | |
4332 | == FAILURE) | |
4333 | return MATCH_ERROR; | |
4334 | ||
4335 | return m; | |
4336 | } | |
4337 | ||
4338 | ||
c3005b0f DK |
4339 | /* Warn if a matched procedure has the same name as an intrinsic; this is |
4340 | simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current | |
4341 | parser-state-stack to find out whether we're in a module. */ | |
4342 | ||
4343 | static void | |
4344 | warn_intrinsic_shadow (const gfc_symbol* sym, bool func) | |
4345 | { | |
4346 | bool in_module; | |
4347 | ||
4348 | in_module = (gfc_state_stack->previous | |
4349 | && gfc_state_stack->previous->state == COMP_MODULE); | |
4350 | ||
4351 | gfc_warn_intrinsic_shadow (sym, in_module, func); | |
4352 | } | |
4353 | ||
4354 | ||
6de9cd9a DN |
4355 | /* Match a function declaration. */ |
4356 | ||
4357 | match | |
4358 | gfc_match_function_decl (void) | |
4359 | { | |
4360 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4361 | gfc_symbol *sym, *result; | |
4362 | locus old_loc; | |
4363 | match m; | |
a8b3b0b6 CR |
4364 | match suffix_match; |
4365 | match found_match; /* Status returned by match func. */ | |
6de9cd9a DN |
4366 | |
4367 | if (gfc_current_state () != COMP_NONE | |
4368 | && gfc_current_state () != COMP_INTERFACE | |
4369 | && gfc_current_state () != COMP_CONTAINS) | |
4370 | return MATCH_NO; | |
4371 | ||
4372 | gfc_clear_ts (¤t_ts); | |
4373 | ||
63645982 | 4374 | old_loc = gfc_current_locus; |
6de9cd9a | 4375 | |
1c8bcdf7 | 4376 | m = gfc_match_prefix (¤t_ts); |
6de9cd9a DN |
4377 | if (m != MATCH_YES) |
4378 | { | |
63645982 | 4379 | gfc_current_locus = old_loc; |
6de9cd9a DN |
4380 | return m; |
4381 | } | |
4382 | ||
4383 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
4384 | { | |
63645982 | 4385 | gfc_current_locus = old_loc; |
6de9cd9a DN |
4386 | return MATCH_NO; |
4387 | } | |
1a492601 | 4388 | if (get_proc_name (name, &sym, false)) |
6de9cd9a DN |
4389 | return MATCH_ERROR; |
4390 | gfc_new_block = sym; | |
4391 | ||
4392 | m = gfc_match_formal_arglist (sym, 0, 0); | |
4393 | if (m == MATCH_NO) | |
2b9a33ae TS |
4394 | { |
4395 | gfc_error ("Expected formal argument list in function " | |
636dff67 | 4396 | "definition at %C"); |
2b9a33ae TS |
4397 | m = MATCH_ERROR; |
4398 | goto cleanup; | |
4399 | } | |
6de9cd9a DN |
4400 | else if (m == MATCH_ERROR) |
4401 | goto cleanup; | |
4402 | ||
4403 | result = NULL; | |
4404 | ||
a8b3b0b6 CR |
4405 | /* According to the draft, the bind(c) and result clause can |
4406 | come in either order after the formal_arg_list (i.e., either | |
4407 | can be first, both can exist together or by themselves or neither | |
4408 | one). Therefore, the match_result can't match the end of the | |
4409 | string, and check for the bind(c) or result clause in either order. */ | |
4410 | found_match = gfc_match_eos (); | |
4411 | ||
4412 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
4413 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4414 | not allowed for procedures. */ | |
4415 | if (sym->attr.is_bind_c == 1) | |
4416 | { | |
4417 | sym->attr.is_bind_c = 0; | |
4418 | if (sym->old_symbol != NULL) | |
4419 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4420 | "variables or common blocks", | |
4421 | &(sym->old_symbol->declared_at)); | |
4422 | else | |
4423 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4424 | "variables or common blocks", &gfc_current_locus); | |
6de9cd9a DN |
4425 | } |
4426 | ||
a8b3b0b6 | 4427 | if (found_match != MATCH_YES) |
6de9cd9a | 4428 | { |
a8b3b0b6 CR |
4429 | /* If we haven't found the end-of-statement, look for a suffix. */ |
4430 | suffix_match = gfc_match_suffix (sym, &result); | |
4431 | if (suffix_match == MATCH_YES) | |
4432 | /* Need to get the eos now. */ | |
4433 | found_match = gfc_match_eos (); | |
4434 | else | |
4435 | found_match = suffix_match; | |
6de9cd9a DN |
4436 | } |
4437 | ||
a8b3b0b6 CR |
4438 | if(found_match != MATCH_YES) |
4439 | m = MATCH_ERROR; | |
6de9cd9a DN |
4440 | else |
4441 | { | |
a8b3b0b6 CR |
4442 | /* Make changes to the symbol. */ |
4443 | m = MATCH_ERROR; | |
4444 | ||
4445 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) | |
4446 | goto cleanup; | |
4447 | ||
4448 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
4449 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4450 | goto cleanup; | |
6de9cd9a | 4451 | |
a8b3b0b6 CR |
4452 | if (current_ts.type != BT_UNKNOWN && sym->ts.type != BT_UNKNOWN |
4453 | && !sym->attr.implicit_type) | |
4454 | { | |
4455 | gfc_error ("Function '%s' at %C already has a type of %s", name, | |
4456 | gfc_basic_typename (sym->ts.type)); | |
4457 | goto cleanup; | |
4458 | } | |
4459 | ||
a99d95a2 | 4460 | /* Delay matching the function characteristics until after the |
1c8bcdf7 | 4461 | specification block by signalling kind=-1. */ |
a99d95a2 PT |
4462 | sym->declared_at = old_loc; |
4463 | if (current_ts.type != BT_UNKNOWN) | |
4464 | current_ts.kind = -1; | |
4465 | else | |
4466 | current_ts.kind = 0; | |
1c8bcdf7 | 4467 | |
a8b3b0b6 CR |
4468 | if (result == NULL) |
4469 | { | |
4470 | sym->ts = current_ts; | |
4471 | sym->result = sym; | |
4472 | } | |
4473 | else | |
4474 | { | |
4475 | result->ts = current_ts; | |
4476 | sym->result = result; | |
4477 | } | |
4478 | ||
c3005b0f DK |
4479 | /* Warn if this procedure has the same name as an intrinsic. */ |
4480 | warn_intrinsic_shadow (sym, true); | |
4481 | ||
a8b3b0b6 CR |
4482 | return MATCH_YES; |
4483 | } | |
6de9cd9a DN |
4484 | |
4485 | cleanup: | |
63645982 | 4486 | gfc_current_locus = old_loc; |
6de9cd9a DN |
4487 | return m; |
4488 | } | |
4489 | ||
636dff67 SK |
4490 | |
4491 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
4492 | pass the name of the entry, rather than the gfc_current_block name, and | |
4493 | to return false upon finding an existing global entry. */ | |
68ea355b PT |
4494 | |
4495 | static bool | |
636dff67 | 4496 | add_global_entry (const char *name, int sub) |
68ea355b PT |
4497 | { |
4498 | gfc_gsymbol *s; | |
fcd5a113 | 4499 | unsigned int type; |
68ea355b PT |
4500 | |
4501 | s = gfc_get_gsymbol(name); | |
7389bce6 | 4502 | type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; |
68ea355b PT |
4503 | |
4504 | if (s->defined | |
636dff67 | 4505 | || (s->type != GSYM_UNKNOWN |
7389bce6 | 4506 | && s->type != type)) |
ca39e6f2 | 4507 | gfc_global_used(s, NULL); |
68ea355b PT |
4508 | else |
4509 | { | |
7389bce6 | 4510 | s->type = type; |
68ea355b PT |
4511 | s->where = gfc_current_locus; |
4512 | s->defined = 1; | |
4513 | return true; | |
4514 | } | |
4515 | return false; | |
4516 | } | |
6de9cd9a | 4517 | |
636dff67 | 4518 | |
6de9cd9a DN |
4519 | /* Match an ENTRY statement. */ |
4520 | ||
4521 | match | |
4522 | gfc_match_entry (void) | |
4523 | { | |
3d79abbd PB |
4524 | gfc_symbol *proc; |
4525 | gfc_symbol *result; | |
4526 | gfc_symbol *entry; | |
6de9cd9a DN |
4527 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
4528 | gfc_compile_state state; | |
4529 | match m; | |
3d79abbd | 4530 | gfc_entry_list *el; |
c96cfa49 | 4531 | locus old_loc; |
1a492601 | 4532 | bool module_procedure; |
bc3e7a8c TB |
4533 | char peek_char; |
4534 | match is_bind_c; | |
6de9cd9a DN |
4535 | |
4536 | m = gfc_match_name (name); | |
4537 | if (m != MATCH_YES) | |
4538 | return m; | |
4539 | ||
3d79abbd | 4540 | state = gfc_current_state (); |
4c93c95a | 4541 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
3d79abbd | 4542 | { |
4c93c95a FXC |
4543 | switch (state) |
4544 | { | |
4545 | case COMP_PROGRAM: | |
4546 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
4547 | break; | |
4548 | case COMP_MODULE: | |
4549 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
4550 | break; | |
4551 | case COMP_BLOCK_DATA: | |
636dff67 SK |
4552 | gfc_error ("ENTRY statement at %C cannot appear within " |
4553 | "a BLOCK DATA"); | |
4c93c95a FXC |
4554 | break; |
4555 | case COMP_INTERFACE: | |
636dff67 SK |
4556 | gfc_error ("ENTRY statement at %C cannot appear within " |
4557 | "an INTERFACE"); | |
4c93c95a FXC |
4558 | break; |
4559 | case COMP_DERIVED: | |
636dff67 SK |
4560 | gfc_error ("ENTRY statement at %C cannot appear within " |
4561 | "a DERIVED TYPE block"); | |
4c93c95a FXC |
4562 | break; |
4563 | case COMP_IF: | |
636dff67 SK |
4564 | gfc_error ("ENTRY statement at %C cannot appear within " |
4565 | "an IF-THEN block"); | |
4c93c95a FXC |
4566 | break; |
4567 | case COMP_DO: | |
636dff67 SK |
4568 | gfc_error ("ENTRY statement at %C cannot appear within " |
4569 | "a DO block"); | |
4c93c95a FXC |
4570 | break; |
4571 | case COMP_SELECT: | |
636dff67 SK |
4572 | gfc_error ("ENTRY statement at %C cannot appear within " |
4573 | "a SELECT block"); | |
4c93c95a FXC |
4574 | break; |
4575 | case COMP_FORALL: | |
636dff67 SK |
4576 | gfc_error ("ENTRY statement at %C cannot appear within " |
4577 | "a FORALL block"); | |
4c93c95a FXC |
4578 | break; |
4579 | case COMP_WHERE: | |
636dff67 SK |
4580 | gfc_error ("ENTRY statement at %C cannot appear within " |
4581 | "a WHERE block"); | |
4c93c95a FXC |
4582 | break; |
4583 | case COMP_CONTAINS: | |
636dff67 SK |
4584 | gfc_error ("ENTRY statement at %C cannot appear within " |
4585 | "a contained subprogram"); | |
4c93c95a FXC |
4586 | break; |
4587 | default: | |
4588 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
4589 | } | |
3d79abbd PB |
4590 | return MATCH_ERROR; |
4591 | } | |
4592 | ||
1a492601 | 4593 | module_procedure = gfc_current_ns->parent != NULL |
636dff67 SK |
4594 | && gfc_current_ns->parent->proc_name |
4595 | && gfc_current_ns->parent->proc_name->attr.flavor | |
4596 | == FL_MODULE; | |
1a492601 | 4597 | |
3d79abbd PB |
4598 | if (gfc_current_ns->parent != NULL |
4599 | && gfc_current_ns->parent->proc_name | |
1a492601 | 4600 | && !module_procedure) |
3d79abbd PB |
4601 | { |
4602 | gfc_error("ENTRY statement at %C cannot appear in a " | |
4603 | "contained procedure"); | |
4604 | return MATCH_ERROR; | |
4605 | } | |
4606 | ||
1a492601 PT |
4607 | /* Module function entries need special care in get_proc_name |
4608 | because previous references within the function will have | |
4609 | created symbols attached to the current namespace. */ | |
4610 | if (get_proc_name (name, &entry, | |
4611 | gfc_current_ns->parent != NULL | |
4612 | && module_procedure | |
4613 | && gfc_current_ns->proc_name->attr.function)) | |
6de9cd9a DN |
4614 | return MATCH_ERROR; |
4615 | ||
3d79abbd PB |
4616 | proc = gfc_current_block (); |
4617 | ||
bc3e7a8c TB |
4618 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
4619 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4620 | not allowed for procedures. */ | |
4621 | if (entry->attr.is_bind_c == 1) | |
4622 | { | |
4623 | entry->attr.is_bind_c = 0; | |
4624 | if (entry->old_symbol != NULL) | |
4625 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4626 | "variables or common blocks", | |
4627 | &(entry->old_symbol->declared_at)); | |
4628 | else | |
4629 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4630 | "variables or common blocks", &gfc_current_locus); | |
4631 | } | |
4632 | ||
4633 | /* Check what next non-whitespace character is so we can tell if there | |
4634 | is the required parens if we have a BIND(C). */ | |
4635 | gfc_gobble_whitespace (); | |
8fc541d3 | 4636 | peek_char = gfc_peek_ascii_char (); |
bc3e7a8c | 4637 | |
3d79abbd | 4638 | if (state == COMP_SUBROUTINE) |
6de9cd9a | 4639 | { |
231b2fcc | 4640 | /* An entry in a subroutine. */ |
182393f4 | 4641 | if (!gfc_current_ns->parent && !add_global_entry (name, 1)) |
68ea355b PT |
4642 | return MATCH_ERROR; |
4643 | ||
6de9cd9a DN |
4644 | m = gfc_match_formal_arglist (entry, 0, 1); |
4645 | if (m != MATCH_YES) | |
4646 | return MATCH_ERROR; | |
4647 | ||
1eabf70a TB |
4648 | /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can |
4649 | never be an internal procedure. */ | |
4650 | is_bind_c = gfc_match_bind_c (entry, true); | |
bc3e7a8c TB |
4651 | if (is_bind_c == MATCH_ERROR) |
4652 | return MATCH_ERROR; | |
4653 | if (is_bind_c == MATCH_YES) | |
4654 | { | |
4655 | if (peek_char != '(') | |
4656 | { | |
4657 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
4658 | return MATCH_ERROR; | |
4659 | } | |
4660 | if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1) | |
4661 | == FAILURE) | |
4662 | return MATCH_ERROR; | |
4663 | } | |
4664 | ||
231b2fcc TS |
4665 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4666 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a | 4667 | return MATCH_ERROR; |
3d79abbd PB |
4668 | } |
4669 | else | |
4670 | { | |
c96cfa49 | 4671 | /* An entry in a function. |
636dff67 SK |
4672 | We need to take special care because writing |
4673 | ENTRY f() | |
4674 | as | |
4675 | ENTRY f | |
4676 | is allowed, whereas | |
4677 | ENTRY f() RESULT (r) | |
4678 | can't be written as | |
4679 | ENTRY f RESULT (r). */ | |
182393f4 | 4680 | if (!gfc_current_ns->parent && !add_global_entry (name, 0)) |
68ea355b PT |
4681 | return MATCH_ERROR; |
4682 | ||
c96cfa49 TS |
4683 | old_loc = gfc_current_locus; |
4684 | if (gfc_match_eos () == MATCH_YES) | |
4685 | { | |
4686 | gfc_current_locus = old_loc; | |
4687 | /* Match the empty argument list, and add the interface to | |
4688 | the symbol. */ | |
4689 | m = gfc_match_formal_arglist (entry, 0, 1); | |
4690 | } | |
4691 | else | |
4692 | m = gfc_match_formal_arglist (entry, 0, 0); | |
4693 | ||
6de9cd9a DN |
4694 | if (m != MATCH_YES) |
4695 | return MATCH_ERROR; | |
4696 | ||
6de9cd9a DN |
4697 | result = NULL; |
4698 | ||
4699 | if (gfc_match_eos () == MATCH_YES) | |
4700 | { | |
231b2fcc TS |
4701 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4702 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a DN |
4703 | return MATCH_ERROR; |
4704 | ||
d198b59a | 4705 | entry->result = entry; |
6de9cd9a DN |
4706 | } |
4707 | else | |
4708 | { | |
bc3e7a8c | 4709 | m = gfc_match_suffix (entry, &result); |
6de9cd9a DN |
4710 | if (m == MATCH_NO) |
4711 | gfc_syntax_error (ST_ENTRY); | |
4712 | if (m != MATCH_YES) | |
4713 | return MATCH_ERROR; | |
4714 | ||
bc3e7a8c TB |
4715 | if (result) |
4716 | { | |
4717 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE | |
4718 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
4719 | || gfc_add_function (&entry->attr, result->name, NULL) | |
4720 | == FAILURE) | |
4721 | return MATCH_ERROR; | |
4722 | entry->result = result; | |
4723 | } | |
4724 | else | |
4725 | { | |
4726 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE | |
4727 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
4728 | return MATCH_ERROR; | |
4729 | entry->result = entry; | |
4730 | } | |
6de9cd9a | 4731 | } |
6de9cd9a DN |
4732 | } |
4733 | ||
4734 | if (gfc_match_eos () != MATCH_YES) | |
4735 | { | |
4736 | gfc_syntax_error (ST_ENTRY); | |
4737 | return MATCH_ERROR; | |
4738 | } | |
4739 | ||
3d79abbd PB |
4740 | entry->attr.recursive = proc->attr.recursive; |
4741 | entry->attr.elemental = proc->attr.elemental; | |
4742 | entry->attr.pure = proc->attr.pure; | |
6de9cd9a | 4743 | |
3d79abbd PB |
4744 | el = gfc_get_entry_list (); |
4745 | el->sym = entry; | |
4746 | el->next = gfc_current_ns->entries; | |
4747 | gfc_current_ns->entries = el; | |
4748 | if (el->next) | |
4749 | el->id = el->next->id + 1; | |
4750 | else | |
4751 | el->id = 1; | |
6de9cd9a | 4752 | |
3d79abbd PB |
4753 | new_st.op = EXEC_ENTRY; |
4754 | new_st.ext.entry = el; | |
4755 | ||
4756 | return MATCH_YES; | |
6de9cd9a DN |
4757 | } |
4758 | ||
4759 | ||
4760 | /* Match a subroutine statement, including optional prefixes. */ | |
4761 | ||
4762 | match | |
4763 | gfc_match_subroutine (void) | |
4764 | { | |
4765 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4766 | gfc_symbol *sym; | |
4767 | match m; | |
a8b3b0b6 CR |
4768 | match is_bind_c; |
4769 | char peek_char; | |
1eabf70a | 4770 | bool allow_binding_name; |
6de9cd9a DN |
4771 | |
4772 | if (gfc_current_state () != COMP_NONE | |
4773 | && gfc_current_state () != COMP_INTERFACE | |
4774 | && gfc_current_state () != COMP_CONTAINS) | |
4775 | return MATCH_NO; | |
4776 | ||
1c8bcdf7 | 4777 | m = gfc_match_prefix (NULL); |
6de9cd9a DN |
4778 | if (m != MATCH_YES) |
4779 | return m; | |
4780 | ||
4781 | m = gfc_match ("subroutine% %n", name); | |
4782 | if (m != MATCH_YES) | |
4783 | return m; | |
4784 | ||
1a492601 | 4785 | if (get_proc_name (name, &sym, false)) |
6de9cd9a DN |
4786 | return MATCH_ERROR; |
4787 | gfc_new_block = sym; | |
4788 | ||
a8b3b0b6 | 4789 | /* Check what next non-whitespace character is so we can tell if there |
bc3e7a8c | 4790 | is the required parens if we have a BIND(C). */ |
a8b3b0b6 | 4791 | gfc_gobble_whitespace (); |
8fc541d3 | 4792 | peek_char = gfc_peek_ascii_char (); |
a8b3b0b6 | 4793 | |
231b2fcc | 4794 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
4795 | return MATCH_ERROR; |
4796 | ||
4797 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
4798 | return MATCH_ERROR; | |
4799 | ||
a8b3b0b6 CR |
4800 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
4801 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4802 | not allowed for procedures. */ | |
4803 | if (sym->attr.is_bind_c == 1) | |
4804 | { | |
4805 | sym->attr.is_bind_c = 0; | |
4806 | if (sym->old_symbol != NULL) | |
4807 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4808 | "variables or common blocks", | |
4809 | &(sym->old_symbol->declared_at)); | |
4810 | else | |
4811 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4812 | "variables or common blocks", &gfc_current_locus); | |
4813 | } | |
1eabf70a TB |
4814 | |
4815 | /* C binding names are not allowed for internal procedures. */ | |
4816 | if (gfc_current_state () == COMP_CONTAINS | |
4817 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
4818 | allow_binding_name = false; | |
4819 | else | |
4820 | allow_binding_name = true; | |
4821 | ||
a8b3b0b6 CR |
4822 | /* Here, we are just checking if it has the bind(c) attribute, and if |
4823 | so, then we need to make sure it's all correct. If it doesn't, | |
4824 | we still need to continue matching the rest of the subroutine line. */ | |
1eabf70a | 4825 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
a8b3b0b6 CR |
4826 | if (is_bind_c == MATCH_ERROR) |
4827 | { | |
4828 | /* There was an attempt at the bind(c), but it was wrong. An | |
4829 | error message should have been printed w/in the gfc_match_bind_c | |
4830 | so here we'll just return the MATCH_ERROR. */ | |
4831 | return MATCH_ERROR; | |
4832 | } | |
4833 | ||
4834 | if (is_bind_c == MATCH_YES) | |
4835 | { | |
1eabf70a | 4836 | /* The following is allowed in the Fortran 2008 draft. */ |
01f4fff1 | 4837 | if (gfc_current_state () == COMP_CONTAINS |
1eabf70a | 4838 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
fdc54e88 FXC |
4839 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
4840 | "at %L may not be specified for an internal " | |
4841 | "procedure", &gfc_current_locus) | |
1eabf70a TB |
4842 | == FAILURE) |
4843 | return MATCH_ERROR; | |
4844 | ||
a8b3b0b6 CR |
4845 | if (peek_char != '(') |
4846 | { | |
4847 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
4848 | return MATCH_ERROR; | |
4849 | } | |
4850 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) | |
4851 | == FAILURE) | |
4852 | return MATCH_ERROR; | |
4853 | } | |
4854 | ||
6de9cd9a DN |
4855 | if (gfc_match_eos () != MATCH_YES) |
4856 | { | |
4857 | gfc_syntax_error (ST_SUBROUTINE); | |
4858 | return MATCH_ERROR; | |
4859 | } | |
4860 | ||
4861 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4862 | return MATCH_ERROR; | |
4863 | ||
c3005b0f DK |
4864 | /* Warn if it has the same name as an intrinsic. */ |
4865 | warn_intrinsic_shadow (sym, false); | |
4866 | ||
6de9cd9a DN |
4867 | return MATCH_YES; |
4868 | } | |
4869 | ||
4870 | ||
a8b3b0b6 CR |
4871 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
4872 | given, and set the binding label in either the given symbol (if not | |
86bf520d | 4873 | NULL), or in the current_ts. The symbol may be NULL because we may |
a8b3b0b6 CR |
4874 | encounter the BIND(C) before the declaration itself. Return |
4875 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, | |
4876 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, | |
4877 | or MATCH_YES if the specifier was correct and the binding label and | |
4878 | bind(c) fields were set correctly for the given symbol or the | |
1eabf70a TB |
4879 | current_ts. If allow_binding_name is false, no binding name may be |
4880 | given. */ | |
a8b3b0b6 CR |
4881 | |
4882 | match | |
1eabf70a | 4883 | gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name) |
a8b3b0b6 CR |
4884 | { |
4885 | /* binding label, if exists */ | |
4886 | char binding_label[GFC_MAX_SYMBOL_LEN + 1]; | |
4887 | match double_quote; | |
4888 | match single_quote; | |
a8b3b0b6 CR |
4889 | |
4890 | /* Initialize the flag that specifies whether we encountered a NAME= | |
4891 | specifier or not. */ | |
4892 | has_name_equals = 0; | |
4893 | ||
4894 | /* Init the first char to nil so we can catch if we don't have | |
4895 | the label (name attr) or the symbol name yet. */ | |
4896 | binding_label[0] = '\0'; | |
4897 | ||
4898 | /* This much we have to be able to match, in this order, if | |
4899 | there is a bind(c) label. */ | |
4900 | if (gfc_match (" bind ( c ") != MATCH_YES) | |
4901 | return MATCH_NO; | |
4902 | ||
4903 | /* Now see if there is a binding label, or if we've reached the | |
4904 | end of the bind(c) attribute without one. */ | |
4905 | if (gfc_match_char (',') == MATCH_YES) | |
4906 | { | |
4907 | if (gfc_match (" name = ") != MATCH_YES) | |
4908 | { | |
4909 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
4910 | "at %C"); | |
4911 | /* should give an error message here */ | |
4912 | return MATCH_ERROR; | |
4913 | } | |
4914 | ||
4915 | has_name_equals = 1; | |
4916 | ||
4917 | /* Get the opening quote. */ | |
4918 | double_quote = MATCH_YES; | |
4919 | single_quote = MATCH_YES; | |
4920 | double_quote = gfc_match_char ('"'); | |
4921 | if (double_quote != MATCH_YES) | |
4922 | single_quote = gfc_match_char ('\''); | |
4923 | if (double_quote != MATCH_YES && single_quote != MATCH_YES) | |
4924 | { | |
4925 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
4926 | "at %C"); | |
4927 | return MATCH_ERROR; | |
4928 | } | |
4929 | ||
4930 | /* Grab the binding label, using functions that will not lower | |
4931 | case the names automatically. */ | |
4932 | if (gfc_match_name_C (binding_label) != MATCH_YES) | |
4933 | return MATCH_ERROR; | |
4934 | ||
4935 | /* Get the closing quotation. */ | |
4936 | if (double_quote == MATCH_YES) | |
4937 | { | |
4938 | if (gfc_match_char ('"') != MATCH_YES) | |
4939 | { | |
4940 | gfc_error ("Missing closing quote '\"' for binding label at %C"); | |
4941 | /* User started string with '"' so looked to match it. */ | |
4942 | return MATCH_ERROR; | |
4943 | } | |
4944 | } | |
4945 | else | |
4946 | { | |
4947 | if (gfc_match_char ('\'') != MATCH_YES) | |
4948 | { | |
4949 | gfc_error ("Missing closing quote '\'' for binding label at %C"); | |
4950 | /* User started string with "'" char. */ | |
4951 | return MATCH_ERROR; | |
4952 | } | |
4953 | } | |
4954 | } | |
4955 | ||
4956 | /* Get the required right paren. */ | |
4957 | if (gfc_match_char (')') != MATCH_YES) | |
4958 | { | |
4959 | gfc_error ("Missing closing paren for binding label at %C"); | |
4960 | return MATCH_ERROR; | |
4961 | } | |
4962 | ||
1eabf70a TB |
4963 | if (has_name_equals && !allow_binding_name) |
4964 | { | |
4965 | gfc_error ("No binding name is allowed in BIND(C) at %C"); | |
4966 | return MATCH_ERROR; | |
4967 | } | |
4968 | ||
4969 | if (has_name_equals && sym != NULL && sym->attr.dummy) | |
4970 | { | |
4971 | gfc_error ("For dummy procedure %s, no binding name is " | |
4972 | "allowed in BIND(C) at %C", sym->name); | |
4973 | return MATCH_ERROR; | |
4974 | } | |
4975 | ||
4976 | ||
a8b3b0b6 CR |
4977 | /* Save the binding label to the symbol. If sym is null, we're |
4978 | probably matching the typespec attributes of a declaration and | |
4979 | haven't gotten the name yet, and therefore, no symbol yet. */ | |
4980 | if (binding_label[0] != '\0') | |
4981 | { | |
4982 | if (sym != NULL) | |
4983 | { | |
c5b5a17a | 4984 | strcpy (sym->binding_label, binding_label); |
a8b3b0b6 CR |
4985 | } |
4986 | else | |
c5b5a17a | 4987 | strcpy (curr_binding_label, binding_label); |
a8b3b0b6 | 4988 | } |
1eabf70a | 4989 | else if (allow_binding_name) |
a8b3b0b6 CR |
4990 | { |
4991 | /* No binding label, but if symbol isn't null, we | |
1eabf70a TB |
4992 | can set the label for it here. |
4993 | If name="" or allow_binding_name is false, no C binding name is | |
4994 | created. */ | |
a8b3b0b6 CR |
4995 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) |
4996 | strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1); | |
4997 | } | |
9e1d712c | 4998 | |
129d15a3 JW |
4999 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
5000 | && current_interface.type == INTERFACE_ABSTRACT) | |
9e1d712c TB |
5001 | { |
5002 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); | |
5003 | return MATCH_ERROR; | |
5004 | } | |
5005 | ||
a8b3b0b6 CR |
5006 | return MATCH_YES; |
5007 | } | |
5008 | ||
5009 | ||
1f2959f0 | 5010 | /* Return nonzero if we're currently compiling a contained procedure. */ |
ddc9ce91 TS |
5011 | |
5012 | static int | |
5013 | contained_procedure (void) | |
5014 | { | |
083de129 | 5015 | gfc_state_data *s = gfc_state_stack; |
ddc9ce91 | 5016 | |
083de129 TB |
5017 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) |
5018 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) | |
5019 | return 1; | |
ddc9ce91 TS |
5020 | |
5021 | return 0; | |
5022 | } | |
5023 | ||
d51347f9 | 5024 | /* Set the kind of each enumerator. The kind is selected such that it is |
25d8f0a2 TS |
5025 | interoperable with the corresponding C enumeration type, making |
5026 | sure that -fshort-enums is honored. */ | |
5027 | ||
5028 | static void | |
5029 | set_enum_kind(void) | |
5030 | { | |
5031 | enumerator_history *current_history = NULL; | |
5032 | int kind; | |
5033 | int i; | |
5034 | ||
5035 | if (max_enum == NULL || enum_history == NULL) | |
5036 | return; | |
5037 | ||
5038 | if (!gfc_option.fshort_enums) | |
d51347f9 TB |
5039 | return; |
5040 | ||
25d8f0a2 TS |
5041 | i = 0; |
5042 | do | |
5043 | { | |
5044 | kind = gfc_integer_kinds[i++].kind; | |
5045 | } | |
d51347f9 | 5046 | while (kind < gfc_c_int_kind |
25d8f0a2 TS |
5047 | && gfc_check_integer_range (max_enum->initializer->value.integer, |
5048 | kind) != ARITH_OK); | |
5049 | ||
5050 | current_history = enum_history; | |
5051 | while (current_history != NULL) | |
5052 | { | |
5053 | current_history->sym->ts.kind = kind; | |
5054 | current_history = current_history->next; | |
5055 | } | |
5056 | } | |
5057 | ||
636dff67 | 5058 | |
6de9cd9a DN |
5059 | /* Match any of the various end-block statements. Returns the type of |
5060 | END to the caller. The END INTERFACE, END IF, END DO and END | |
5061 | SELECT statements cannot be replaced by a single END statement. */ | |
5062 | ||
5063 | match | |
636dff67 | 5064 | gfc_match_end (gfc_statement *st) |
6de9cd9a DN |
5065 | { |
5066 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5067 | gfc_compile_state state; | |
5068 | locus old_loc; | |
5069 | const char *block_name; | |
5070 | const char *target; | |
ddc9ce91 | 5071 | int eos_ok; |
6de9cd9a DN |
5072 | match m; |
5073 | ||
63645982 | 5074 | old_loc = gfc_current_locus; |
6de9cd9a DN |
5075 | if (gfc_match ("end") != MATCH_YES) |
5076 | return MATCH_NO; | |
5077 | ||
5078 | state = gfc_current_state (); | |
636dff67 SK |
5079 | block_name = gfc_current_block () == NULL |
5080 | ? NULL : gfc_current_block ()->name; | |
6de9cd9a DN |
5081 | |
5082 | if (state == COMP_CONTAINS) | |
5083 | { | |
5084 | state = gfc_state_stack->previous->state; | |
636dff67 SK |
5085 | block_name = gfc_state_stack->previous->sym == NULL |
5086 | ? NULL : gfc_state_stack->previous->sym->name; | |
6de9cd9a DN |
5087 | } |
5088 | ||
5089 | switch (state) | |
5090 | { | |
5091 | case COMP_NONE: | |
5092 | case COMP_PROGRAM: | |
5093 | *st = ST_END_PROGRAM; | |
5094 | target = " program"; | |
ddc9ce91 | 5095 | eos_ok = 1; |
6de9cd9a DN |
5096 | break; |
5097 | ||
5098 | case COMP_SUBROUTINE: | |
5099 | *st = ST_END_SUBROUTINE; | |
5100 | target = " subroutine"; | |
ddc9ce91 | 5101 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
5102 | break; |
5103 | ||
5104 | case COMP_FUNCTION: | |
5105 | *st = ST_END_FUNCTION; | |
5106 | target = " function"; | |
ddc9ce91 | 5107 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
5108 | break; |
5109 | ||
5110 | case COMP_BLOCK_DATA: | |
5111 | *st = ST_END_BLOCK_DATA; | |
5112 | target = " block data"; | |
ddc9ce91 | 5113 | eos_ok = 1; |
6de9cd9a DN |
5114 | break; |
5115 | ||
5116 | case COMP_MODULE: | |
5117 | *st = ST_END_MODULE; | |
5118 | target = " module"; | |
ddc9ce91 | 5119 | eos_ok = 1; |
6de9cd9a DN |
5120 | break; |
5121 | ||
5122 | case COMP_INTERFACE: | |
5123 | *st = ST_END_INTERFACE; | |
5124 | target = " interface"; | |
ddc9ce91 | 5125 | eos_ok = 0; |
6de9cd9a DN |
5126 | break; |
5127 | ||
5128 | case COMP_DERIVED: | |
5129 | *st = ST_END_TYPE; | |
5130 | target = " type"; | |
ddc9ce91 | 5131 | eos_ok = 0; |
6de9cd9a DN |
5132 | break; |
5133 | ||
5134 | case COMP_IF: | |
5135 | *st = ST_ENDIF; | |
5136 | target = " if"; | |
ddc9ce91 | 5137 | eos_ok = 0; |
6de9cd9a DN |
5138 | break; |
5139 | ||
5140 | case COMP_DO: | |
5141 | *st = ST_ENDDO; | |
5142 | target = " do"; | |
ddc9ce91 | 5143 | eos_ok = 0; |
6de9cd9a DN |
5144 | break; |
5145 | ||
5146 | case COMP_SELECT: | |
5147 | *st = ST_END_SELECT; | |
5148 | target = " select"; | |
ddc9ce91 | 5149 | eos_ok = 0; |
6de9cd9a DN |
5150 | break; |
5151 | ||
5152 | case COMP_FORALL: | |
5153 | *st = ST_END_FORALL; | |
5154 | target = " forall"; | |
ddc9ce91 | 5155 | eos_ok = 0; |
6de9cd9a DN |
5156 | break; |
5157 | ||
5158 | case COMP_WHERE: | |
5159 | *st = ST_END_WHERE; | |
5160 | target = " where"; | |
ddc9ce91 | 5161 | eos_ok = 0; |
6de9cd9a DN |
5162 | break; |
5163 | ||
25d8f0a2 TS |
5164 | case COMP_ENUM: |
5165 | *st = ST_END_ENUM; | |
5166 | target = " enum"; | |
5167 | eos_ok = 0; | |
5168 | last_initializer = NULL; | |
5169 | set_enum_kind (); | |
5170 | gfc_free_enum_history (); | |
5171 | break; | |
5172 | ||
6de9cd9a DN |
5173 | default: |
5174 | gfc_error ("Unexpected END statement at %C"); | |
5175 | goto cleanup; | |
5176 | } | |
5177 | ||
5178 | if (gfc_match_eos () == MATCH_YES) | |
5179 | { | |
ddc9ce91 | 5180 | if (!eos_ok) |
6de9cd9a | 5181 | { |
66e4ab31 | 5182 | /* We would have required END [something]. */ |
59ce85b5 TS |
5183 | gfc_error ("%s statement expected at %L", |
5184 | gfc_ascii_statement (*st), &old_loc); | |
6de9cd9a DN |
5185 | goto cleanup; |
5186 | } | |
5187 | ||
5188 | return MATCH_YES; | |
5189 | } | |
5190 | ||
5191 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
5192 | if (gfc_match (target) != MATCH_YES) | |
5193 | { | |
5194 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
5195 | goto cleanup; | |
5196 | } | |
5197 | ||
5198 | /* If we're at the end, make sure a block name wasn't required. */ | |
5199 | if (gfc_match_eos () == MATCH_YES) | |
5200 | { | |
5201 | ||
690af379 TS |
5202 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT |
5203 | && *st != ST_END_FORALL && *st != ST_END_WHERE) | |
6de9cd9a DN |
5204 | return MATCH_YES; |
5205 | ||
5206 | if (gfc_current_block () == NULL) | |
5207 | return MATCH_YES; | |
5208 | ||
5209 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
5210 | block_name, gfc_ascii_statement (*st)); | |
5211 | ||
5212 | return MATCH_ERROR; | |
5213 | } | |
5214 | ||
5215 | /* END INTERFACE has a special handler for its several possible endings. */ | |
5216 | if (*st == ST_END_INTERFACE) | |
5217 | return gfc_match_end_interface (); | |
5218 | ||
66e4ab31 SK |
5219 | /* We haven't hit the end of statement, so what is left must be an |
5220 | end-name. */ | |
6de9cd9a DN |
5221 | m = gfc_match_space (); |
5222 | if (m == MATCH_YES) | |
5223 | m = gfc_match_name (name); | |
5224 | ||
5225 | if (m == MATCH_NO) | |
5226 | gfc_error ("Expected terminating name at %C"); | |
5227 | if (m != MATCH_YES) | |
5228 | goto cleanup; | |
5229 | ||
5230 | if (block_name == NULL) | |
5231 | goto syntax; | |
5232 | ||
5233 | if (strcmp (name, block_name) != 0) | |
5234 | { | |
5235 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
5236 | gfc_ascii_statement (*st)); | |
5237 | goto cleanup; | |
5238 | } | |
5239 | ||
5240 | if (gfc_match_eos () == MATCH_YES) | |
5241 | return MATCH_YES; | |
5242 | ||
5243 | syntax: | |
5244 | gfc_syntax_error (*st); | |
5245 | ||
5246 | cleanup: | |
63645982 | 5247 | gfc_current_locus = old_loc; |
6de9cd9a DN |
5248 | return MATCH_ERROR; |
5249 | } | |
5250 | ||
5251 | ||
5252 | ||
5253 | /***************** Attribute declaration statements ****************/ | |
5254 | ||
5255 | /* Set the attribute of a single variable. */ | |
5256 | ||
5257 | static match | |
5258 | attr_decl1 (void) | |
5259 | { | |
5260 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5261 | gfc_array_spec *as; | |
5262 | gfc_symbol *sym; | |
5263 | locus var_locus; | |
5264 | match m; | |
5265 | ||
5266 | as = NULL; | |
5267 | ||
5268 | m = gfc_match_name (name); | |
5269 | if (m != MATCH_YES) | |
5270 | goto cleanup; | |
5271 | ||
5272 | if (find_special (name, &sym)) | |
5273 | return MATCH_ERROR; | |
5274 | ||
63645982 | 5275 | var_locus = gfc_current_locus; |
6de9cd9a DN |
5276 | |
5277 | /* Deal with possible array specification for certain attributes. */ | |
5278 | if (current_attr.dimension | |
5279 | || current_attr.allocatable | |
5280 | || current_attr.pointer | |
5281 | || current_attr.target) | |
5282 | { | |
5283 | m = gfc_match_array_spec (&as); | |
5284 | if (m == MATCH_ERROR) | |
5285 | goto cleanup; | |
5286 | ||
5287 | if (current_attr.dimension && m == MATCH_NO) | |
5288 | { | |
636dff67 SK |
5289 | gfc_error ("Missing array specification at %L in DIMENSION " |
5290 | "statement", &var_locus); | |
6de9cd9a DN |
5291 | m = MATCH_ERROR; |
5292 | goto cleanup; | |
5293 | } | |
5294 | ||
1283ab12 TB |
5295 | if (current_attr.dimension && sym->value) |
5296 | { | |
5297 | gfc_error ("Dimensions specified for %s at %L after its " | |
5298 | "initialisation", sym->name, &var_locus); | |
5299 | m = MATCH_ERROR; | |
5300 | goto cleanup; | |
5301 | } | |
5302 | ||
6de9cd9a DN |
5303 | if ((current_attr.allocatable || current_attr.pointer) |
5304 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
5305 | { | |
636dff67 | 5306 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
6de9cd9a DN |
5307 | m = MATCH_ERROR; |
5308 | goto cleanup; | |
5309 | } | |
5310 | } | |
5311 | ||
636dff67 SK |
5312 | /* Update symbol table. DIMENSION attribute is set |
5313 | in gfc_set_array_spec(). */ | |
6de9cd9a | 5314 | if (current_attr.dimension == 0 |
e62532af | 5315 | && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE) |
6de9cd9a DN |
5316 | { |
5317 | m = MATCH_ERROR; | |
5318 | goto cleanup; | |
5319 | } | |
5320 | ||
5321 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
5322 | { | |
5323 | m = MATCH_ERROR; | |
5324 | goto cleanup; | |
5325 | } | |
d51347f9 | 5326 | |
83d890b9 AL |
5327 | if (sym->attr.cray_pointee && sym->as != NULL) |
5328 | { | |
5329 | /* Fix the array spec. */ | |
5330 | m = gfc_mod_pointee_as (sym->as); | |
5331 | if (m == MATCH_ERROR) | |
5332 | goto cleanup; | |
5333 | } | |
6de9cd9a | 5334 | |
7114edca | 5335 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
1902704e PT |
5336 | { |
5337 | m = MATCH_ERROR; | |
5338 | goto cleanup; | |
5339 | } | |
5340 | ||
6de9cd9a DN |
5341 | if ((current_attr.external || current_attr.intrinsic) |
5342 | && sym->attr.flavor != FL_PROCEDURE | |
231b2fcc | 5343 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
5344 | { |
5345 | m = MATCH_ERROR; | |
5346 | goto cleanup; | |
5347 | } | |
5348 | ||
5349 | return MATCH_YES; | |
5350 | ||
5351 | cleanup: | |
5352 | gfc_free_array_spec (as); | |
5353 | return m; | |
5354 | } | |
5355 | ||
5356 | ||
5357 | /* Generic attribute declaration subroutine. Used for attributes that | |
5358 | just have a list of names. */ | |
5359 | ||
5360 | static match | |
5361 | attr_decl (void) | |
5362 | { | |
5363 | match m; | |
5364 | ||
5365 | /* Gobble the optional double colon, by simply ignoring the result | |
5366 | of gfc_match(). */ | |
5367 | gfc_match (" ::"); | |
5368 | ||
5369 | for (;;) | |
5370 | { | |
5371 | m = attr_decl1 (); | |
5372 | if (m != MATCH_YES) | |
5373 | break; | |
5374 | ||
5375 | if (gfc_match_eos () == MATCH_YES) | |
5376 | { | |
5377 | m = MATCH_YES; | |
5378 | break; | |
5379 | } | |
5380 | ||
5381 | if (gfc_match_char (',') != MATCH_YES) | |
5382 | { | |
5383 | gfc_error ("Unexpected character in variable list at %C"); | |
5384 | m = MATCH_ERROR; | |
5385 | break; | |
5386 | } | |
5387 | } | |
5388 | ||
5389 | return m; | |
5390 | } | |
5391 | ||
5392 | ||
83d890b9 AL |
5393 | /* This routine matches Cray Pointer declarations of the form: |
5394 | pointer ( <pointer>, <pointee> ) | |
5395 | or | |
d51347f9 TB |
5396 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
5397 | The pointer, if already declared, should be an integer. Otherwise, we | |
83d890b9 AL |
5398 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
5399 | be either a scalar, or an array declaration. No space is allocated for | |
d51347f9 | 5400 | the pointee. For the statement |
83d890b9 AL |
5401 | pointer (ipt, ar(10)) |
5402 | any subsequent uses of ar will be translated (in C-notation) as | |
d51347f9 | 5403 | ar(i) => ((<type> *) ipt)(i) |
b122dc6a | 5404 | After gimplification, pointee variable will disappear in the code. */ |
83d890b9 AL |
5405 | |
5406 | static match | |
5407 | cray_pointer_decl (void) | |
5408 | { | |
5409 | match m; | |
5410 | gfc_array_spec *as; | |
5411 | gfc_symbol *cptr; /* Pointer symbol. */ | |
5412 | gfc_symbol *cpte; /* Pointee symbol. */ | |
5413 | locus var_locus; | |
5414 | bool done = false; | |
5415 | ||
5416 | while (!done) | |
5417 | { | |
5418 | if (gfc_match_char ('(') != MATCH_YES) | |
5419 | { | |
5420 | gfc_error ("Expected '(' at %C"); | |
d51347f9 | 5421 | return MATCH_ERROR; |
83d890b9 | 5422 | } |
d51347f9 | 5423 | |
83d890b9 AL |
5424 | /* Match pointer. */ |
5425 | var_locus = gfc_current_locus; | |
5426 | gfc_clear_attr (¤t_attr); | |
5427 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
5428 | current_ts.type = BT_INTEGER; | |
5429 | current_ts.kind = gfc_index_integer_kind; | |
5430 | ||
d51347f9 | 5431 | m = gfc_match_symbol (&cptr, 0); |
83d890b9 AL |
5432 | if (m != MATCH_YES) |
5433 | { | |
5434 | gfc_error ("Expected variable name at %C"); | |
5435 | return m; | |
5436 | } | |
d51347f9 | 5437 | |
83d890b9 AL |
5438 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) |
5439 | return MATCH_ERROR; | |
5440 | ||
d51347f9 | 5441 | gfc_set_sym_referenced (cptr); |
83d890b9 AL |
5442 | |
5443 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
5444 | { | |
5445 | cptr->ts.type = BT_INTEGER; | |
d51347f9 | 5446 | cptr->ts.kind = gfc_index_integer_kind; |
83d890b9 AL |
5447 | } |
5448 | else if (cptr->ts.type != BT_INTEGER) | |
5449 | { | |
e25a0da3 | 5450 | gfc_error ("Cray pointer at %C must be an integer"); |
83d890b9 AL |
5451 | return MATCH_ERROR; |
5452 | } | |
5453 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
5454 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
e25a0da3 | 5455 | " memory addresses require %d bytes", |
636dff67 | 5456 | cptr->ts.kind, gfc_index_integer_kind); |
83d890b9 AL |
5457 | |
5458 | if (gfc_match_char (',') != MATCH_YES) | |
5459 | { | |
5460 | gfc_error ("Expected \",\" at %C"); | |
d51347f9 | 5461 | return MATCH_ERROR; |
83d890b9 AL |
5462 | } |
5463 | ||
d51347f9 | 5464 | /* Match Pointee. */ |
83d890b9 AL |
5465 | var_locus = gfc_current_locus; |
5466 | gfc_clear_attr (¤t_attr); | |
5467 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
5468 | current_ts.type = BT_UNKNOWN; | |
5469 | current_ts.kind = 0; | |
5470 | ||
5471 | m = gfc_match_symbol (&cpte, 0); | |
5472 | if (m != MATCH_YES) | |
5473 | { | |
5474 | gfc_error ("Expected variable name at %C"); | |
5475 | return m; | |
5476 | } | |
d51347f9 | 5477 | |
83d890b9 AL |
5478 | /* Check for an optional array spec. */ |
5479 | m = gfc_match_array_spec (&as); | |
5480 | if (m == MATCH_ERROR) | |
5481 | { | |
5482 | gfc_free_array_spec (as); | |
5483 | return m; | |
5484 | } | |
5485 | else if (m == MATCH_NO) | |
5486 | { | |
5487 | gfc_free_array_spec (as); | |
5488 | as = NULL; | |
5489 | } | |
5490 | ||
5491 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
5492 | return MATCH_ERROR; | |
5493 | ||
5494 | gfc_set_sym_referenced (cpte); | |
5495 | ||
5496 | if (cpte->as == NULL) | |
5497 | { | |
5498 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
5499 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
5500 | } | |
5501 | else if (as != NULL) | |
5502 | { | |
e25a0da3 | 5503 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
83d890b9 AL |
5504 | gfc_free_array_spec (as); |
5505 | return MATCH_ERROR; | |
5506 | } | |
5507 | ||
5508 | as = NULL; | |
5509 | ||
5510 | if (cpte->as != NULL) | |
5511 | { | |
5512 | /* Fix array spec. */ | |
5513 | m = gfc_mod_pointee_as (cpte->as); | |
5514 | if (m == MATCH_ERROR) | |
5515 | return m; | |
5516 | } | |
5517 | ||
5518 | /* Point the Pointee at the Pointer. */ | |
b122dc6a | 5519 | cpte->cp_pointer = cptr; |
83d890b9 AL |
5520 | |
5521 | if (gfc_match_char (')') != MATCH_YES) | |
5522 | { | |
5523 | gfc_error ("Expected \")\" at %C"); | |
5524 | return MATCH_ERROR; | |
5525 | } | |
5526 | m = gfc_match_char (','); | |
5527 | if (m != MATCH_YES) | |
5528 | done = true; /* Stop searching for more declarations. */ | |
5529 | ||
5530 | } | |
5531 | ||
5532 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
5533 | || gfc_match_eos () != MATCH_YES) | |
5534 | { | |
5535 | gfc_error ("Expected \",\" or end of statement at %C"); | |
5536 | return MATCH_ERROR; | |
5537 | } | |
5538 | return MATCH_YES; | |
5539 | } | |
5540 | ||
5541 | ||
6de9cd9a DN |
5542 | match |
5543 | gfc_match_external (void) | |
5544 | { | |
5545 | ||
5546 | gfc_clear_attr (¤t_attr); | |
1902704e | 5547 | current_attr.external = 1; |
6de9cd9a DN |
5548 | |
5549 | return attr_decl (); | |
5550 | } | |
5551 | ||
5552 | ||
6de9cd9a DN |
5553 | match |
5554 | gfc_match_intent (void) | |
5555 | { | |
5556 | sym_intent intent; | |
5557 | ||
5558 | intent = match_intent_spec (); | |
5559 | if (intent == INTENT_UNKNOWN) | |
5560 | return MATCH_ERROR; | |
5561 | ||
5562 | gfc_clear_attr (¤t_attr); | |
1902704e | 5563 | current_attr.intent = intent; |
6de9cd9a DN |
5564 | |
5565 | return attr_decl (); | |
5566 | } | |
5567 | ||
5568 | ||
5569 | match | |
5570 | gfc_match_intrinsic (void) | |
5571 | { | |
5572 | ||
5573 | gfc_clear_attr (¤t_attr); | |
1902704e | 5574 | current_attr.intrinsic = 1; |
6de9cd9a DN |
5575 | |
5576 | return attr_decl (); | |
5577 | } | |
5578 | ||
5579 | ||
5580 | match | |
5581 | gfc_match_optional (void) | |
5582 | { | |
5583 | ||
5584 | gfc_clear_attr (¤t_attr); | |
1902704e | 5585 | current_attr.optional = 1; |
6de9cd9a DN |
5586 | |
5587 | return attr_decl (); | |
5588 | } | |
5589 | ||
5590 | ||
5591 | match | |
5592 | gfc_match_pointer (void) | |
5593 | { | |
83d890b9 | 5594 | gfc_gobble_whitespace (); |
8fc541d3 | 5595 | if (gfc_peek_ascii_char () == '(') |
83d890b9 AL |
5596 | { |
5597 | if (!gfc_option.flag_cray_pointer) | |
5598 | { | |
636dff67 SK |
5599 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
5600 | "flag"); | |
83d890b9 AL |
5601 | return MATCH_ERROR; |
5602 | } | |
5603 | return cray_pointer_decl (); | |
5604 | } | |
5605 | else | |
5606 | { | |
5607 | gfc_clear_attr (¤t_attr); | |
1902704e | 5608 | current_attr.pointer = 1; |
83d890b9 AL |
5609 | |
5610 | return attr_decl (); | |
5611 | } | |
6de9cd9a DN |
5612 | } |
5613 | ||
5614 | ||
5615 | match | |
5616 | gfc_match_allocatable (void) | |
5617 | { | |
6de9cd9a | 5618 | gfc_clear_attr (¤t_attr); |
1902704e | 5619 | current_attr.allocatable = 1; |
6de9cd9a DN |
5620 | |
5621 | return attr_decl (); | |
5622 | } | |
5623 | ||
5624 | ||
5625 | match | |
5626 | gfc_match_dimension (void) | |
5627 | { | |
6de9cd9a | 5628 | gfc_clear_attr (¤t_attr); |
1902704e | 5629 | current_attr.dimension = 1; |
6de9cd9a DN |
5630 | |
5631 | return attr_decl (); | |
5632 | } | |
5633 | ||
5634 | ||
5635 | match | |
5636 | gfc_match_target (void) | |
5637 | { | |
6de9cd9a | 5638 | gfc_clear_attr (¤t_attr); |
1902704e | 5639 | current_attr.target = 1; |
6de9cd9a DN |
5640 | |
5641 | return attr_decl (); | |
5642 | } | |
5643 | ||
5644 | ||
5645 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
5646 | statement. */ | |
5647 | ||
5648 | static match | |
5649 | access_attr_decl (gfc_statement st) | |
5650 | { | |
5651 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5652 | interface_type type; | |
5653 | gfc_user_op *uop; | |
5654 | gfc_symbol *sym; | |
a1ee985f | 5655 | gfc_intrinsic_op op; |
6de9cd9a DN |
5656 | match m; |
5657 | ||
5658 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5659 | goto done; | |
5660 | ||
5661 | for (;;) | |
5662 | { | |
a1ee985f | 5663 | m = gfc_match_generic_spec (&type, name, &op); |
6de9cd9a DN |
5664 | if (m == MATCH_NO) |
5665 | goto syntax; | |
5666 | if (m == MATCH_ERROR) | |
5667 | return MATCH_ERROR; | |
5668 | ||
5669 | switch (type) | |
5670 | { | |
5671 | case INTERFACE_NAMELESS: | |
9e1d712c | 5672 | case INTERFACE_ABSTRACT: |
6de9cd9a DN |
5673 | goto syntax; |
5674 | ||
5675 | case INTERFACE_GENERIC: | |
5676 | if (gfc_get_symbol (name, NULL, &sym)) | |
5677 | goto done; | |
5678 | ||
636dff67 SK |
5679 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
5680 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
231b2fcc | 5681 | sym->name, NULL) == FAILURE) |
6de9cd9a DN |
5682 | return MATCH_ERROR; |
5683 | ||
5684 | break; | |
5685 | ||
5686 | case INTERFACE_INTRINSIC_OP: | |
a1ee985f | 5687 | if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN) |
6de9cd9a | 5688 | { |
a1ee985f | 5689 | gfc_current_ns->operator_access[op] = |
6de9cd9a DN |
5690 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; |
5691 | } | |
5692 | else | |
5693 | { | |
5694 | gfc_error ("Access specification of the %s operator at %C has " | |
a1ee985f | 5695 | "already been specified", gfc_op2string (op)); |
6de9cd9a DN |
5696 | goto done; |
5697 | } | |
5698 | ||
5699 | break; | |
5700 | ||
5701 | case INTERFACE_USER_OP: | |
5702 | uop = gfc_get_uop (name); | |
5703 | ||
5704 | if (uop->access == ACCESS_UNKNOWN) | |
5705 | { | |
636dff67 SK |
5706 | uop->access = (st == ST_PUBLIC) |
5707 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
6de9cd9a DN |
5708 | } |
5709 | else | |
5710 | { | |
636dff67 SK |
5711 | gfc_error ("Access specification of the .%s. operator at %C " |
5712 | "has already been specified", sym->name); | |
6de9cd9a DN |
5713 | goto done; |
5714 | } | |
5715 | ||
5716 | break; | |
5717 | } | |
5718 | ||
5719 | if (gfc_match_char (',') == MATCH_NO) | |
5720 | break; | |
5721 | } | |
5722 | ||
5723 | if (gfc_match_eos () != MATCH_YES) | |
5724 | goto syntax; | |
5725 | return MATCH_YES; | |
5726 | ||
5727 | syntax: | |
5728 | gfc_syntax_error (st); | |
5729 | ||
5730 | done: | |
5731 | return MATCH_ERROR; | |
5732 | } | |
5733 | ||
5734 | ||
ee7e677f TB |
5735 | match |
5736 | gfc_match_protected (void) | |
5737 | { | |
5738 | gfc_symbol *sym; | |
5739 | match m; | |
5740 | ||
5741 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
5742 | { | |
5743 | gfc_error ("PROTECTED at %C only allowed in specification " | |
5744 | "part of a module"); | |
5745 | return MATCH_ERROR; | |
5746 | ||
5747 | } | |
5748 | ||
636dff67 | 5749 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
ee7e677f TB |
5750 | == FAILURE) |
5751 | return MATCH_ERROR; | |
5752 | ||
5753 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
5754 | { | |
5755 | return MATCH_ERROR; | |
5756 | } | |
5757 | ||
5758 | if (gfc_match_eos () == MATCH_YES) | |
5759 | goto syntax; | |
5760 | ||
5761 | for(;;) | |
5762 | { | |
5763 | m = gfc_match_symbol (&sym, 0); | |
5764 | switch (m) | |
5765 | { | |
5766 | case MATCH_YES: | |
636dff67 SK |
5767 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
5768 | == FAILURE) | |
ee7e677f TB |
5769 | return MATCH_ERROR; |
5770 | goto next_item; | |
5771 | ||
5772 | case MATCH_NO: | |
5773 | break; | |
5774 | ||
5775 | case MATCH_ERROR: | |
5776 | return MATCH_ERROR; | |
5777 | } | |
5778 | ||
5779 | next_item: | |
5780 | if (gfc_match_eos () == MATCH_YES) | |
5781 | break; | |
5782 | if (gfc_match_char (',') != MATCH_YES) | |
5783 | goto syntax; | |
5784 | } | |
5785 | ||
5786 | return MATCH_YES; | |
5787 | ||
5788 | syntax: | |
5789 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
5790 | return MATCH_ERROR; | |
5791 | } | |
5792 | ||
5793 | ||
86bf520d | 5794 | /* The PRIVATE statement is a bit weird in that it can be an attribute |
df2fba9e | 5795 | declaration, but also works as a standalone statement inside of a |
6de9cd9a DN |
5796 | type declaration or a module. */ |
5797 | ||
5798 | match | |
636dff67 | 5799 | gfc_match_private (gfc_statement *st) |
6de9cd9a DN |
5800 | { |
5801 | ||
5802 | if (gfc_match ("private") != MATCH_YES) | |
5803 | return MATCH_NO; | |
5804 | ||
d51347f9 TB |
5805 | if (gfc_current_state () != COMP_MODULE |
5806 | && (gfc_current_state () != COMP_DERIVED | |
5807 | || !gfc_state_stack->previous | |
5808 | || gfc_state_stack->previous->state != COMP_MODULE)) | |
5809 | { | |
5810 | gfc_error ("PRIVATE statement at %C is only allowed in the " | |
5811 | "specification part of a module"); | |
5812 | return MATCH_ERROR; | |
5813 | } | |
5814 | ||
6de9cd9a DN |
5815 | if (gfc_current_state () == COMP_DERIVED) |
5816 | { | |
5817 | if (gfc_match_eos () == MATCH_YES) | |
5818 | { | |
5819 | *st = ST_PRIVATE; | |
5820 | return MATCH_YES; | |
5821 | } | |
5822 | ||
5823 | gfc_syntax_error (ST_PRIVATE); | |
5824 | return MATCH_ERROR; | |
5825 | } | |
5826 | ||
5827 | if (gfc_match_eos () == MATCH_YES) | |
5828 | { | |
5829 | *st = ST_PRIVATE; | |
5830 | return MATCH_YES; | |
5831 | } | |
5832 | ||
5833 | *st = ST_ATTR_DECL; | |
5834 | return access_attr_decl (ST_PRIVATE); | |
5835 | } | |
5836 | ||
5837 | ||
5838 | match | |
636dff67 | 5839 | gfc_match_public (gfc_statement *st) |
6de9cd9a DN |
5840 | { |
5841 | ||
5842 | if (gfc_match ("public") != MATCH_YES) | |
5843 | return MATCH_NO; | |
5844 | ||
d51347f9 TB |
5845 | if (gfc_current_state () != COMP_MODULE) |
5846 | { | |
5847 | gfc_error ("PUBLIC statement at %C is only allowed in the " | |
5848 | "specification part of a module"); | |
5849 | return MATCH_ERROR; | |
5850 | } | |
5851 | ||
6de9cd9a DN |
5852 | if (gfc_match_eos () == MATCH_YES) |
5853 | { | |
5854 | *st = ST_PUBLIC; | |
5855 | return MATCH_YES; | |
5856 | } | |
5857 | ||
5858 | *st = ST_ATTR_DECL; | |
5859 | return access_attr_decl (ST_PUBLIC); | |
5860 | } | |
5861 | ||
5862 | ||
5863 | /* Workhorse for gfc_match_parameter. */ | |
5864 | ||
5865 | static match | |
5866 | do_parm (void) | |
5867 | { | |
5868 | gfc_symbol *sym; | |
5869 | gfc_expr *init; | |
5870 | match m; | |
5871 | ||
5872 | m = gfc_match_symbol (&sym, 0); | |
5873 | if (m == MATCH_NO) | |
5874 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
5875 | ||
5876 | if (m != MATCH_YES) | |
5877 | return m; | |
5878 | ||
5879 | if (gfc_match_char ('=') == MATCH_NO) | |
5880 | { | |
5881 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
5882 | return MATCH_ERROR; | |
5883 | } | |
5884 | ||
5885 | m = gfc_match_init_expr (&init); | |
5886 | if (m == MATCH_NO) | |
5887 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
5888 | if (m != MATCH_YES) | |
5889 | return m; | |
5890 | ||
5891 | if (sym->ts.type == BT_UNKNOWN | |
5892 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
5893 | { | |
5894 | m = MATCH_ERROR; | |
5895 | goto cleanup; | |
5896 | } | |
5897 | ||
5898 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
231b2fcc | 5899 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
5900 | { |
5901 | m = MATCH_ERROR; | |
5902 | goto cleanup; | |
5903 | } | |
5904 | ||
1283ab12 TB |
5905 | if (sym->value) |
5906 | { | |
5907 | gfc_error ("Initializing already initialized variable at %C"); | |
5908 | m = MATCH_ERROR; | |
5909 | goto cleanup; | |
5910 | } | |
5911 | ||
7e2eba4b DE |
5912 | if (sym->ts.type == BT_CHARACTER |
5913 | && sym->ts.cl != NULL | |
5914 | && sym->ts.cl->length != NULL | |
5915 | && sym->ts.cl->length->expr_type == EXPR_CONSTANT | |
5916 | && init->expr_type == EXPR_CONSTANT | |
357ad64f | 5917 | && init->ts.type == BT_CHARACTER) |
7e2eba4b | 5918 | gfc_set_constant_character_len ( |
d2848082 | 5919 | mpz_get_si (sym->ts.cl->length->value.integer), init, -1); |
357ad64f TB |
5920 | else if (sym->ts.type == BT_CHARACTER && sym->ts.cl != NULL |
5921 | && sym->ts.cl->length == NULL) | |
5922 | { | |
5923 | int clen; | |
5924 | if (init->expr_type == EXPR_CONSTANT) | |
5925 | { | |
5926 | clen = init->value.character.length; | |
5927 | sym->ts.cl->length = gfc_int_expr (clen); | |
5928 | } | |
5929 | else if (init->expr_type == EXPR_ARRAY) | |
5930 | { | |
5931 | gfc_expr *p = init->value.constructor->expr; | |
5932 | clen = p->value.character.length; | |
5933 | sym->ts.cl->length = gfc_int_expr (clen); | |
5934 | } | |
5935 | else if (init->ts.cl && init->ts.cl->length) | |
5936 | sym->ts.cl->length = gfc_copy_expr (sym->value->ts.cl->length); | |
5937 | } | |
7e2eba4b | 5938 | |
6de9cd9a DN |
5939 | sym->value = init; |
5940 | return MATCH_YES; | |
5941 | ||
5942 | cleanup: | |
5943 | gfc_free_expr (init); | |
5944 | return m; | |
5945 | } | |
5946 | ||
5947 | ||
5948 | /* Match a parameter statement, with the weird syntax that these have. */ | |
5949 | ||
5950 | match | |
5951 | gfc_match_parameter (void) | |
5952 | { | |
5953 | match m; | |
5954 | ||
5955 | if (gfc_match_char ('(') == MATCH_NO) | |
5956 | return MATCH_NO; | |
5957 | ||
5958 | for (;;) | |
5959 | { | |
5960 | m = do_parm (); | |
5961 | if (m != MATCH_YES) | |
5962 | break; | |
5963 | ||
5964 | if (gfc_match (" )%t") == MATCH_YES) | |
5965 | break; | |
5966 | ||
5967 | if (gfc_match_char (',') != MATCH_YES) | |
5968 | { | |
5969 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
5970 | m = MATCH_ERROR; | |
5971 | break; | |
5972 | } | |
5973 | } | |
5974 | ||
5975 | return m; | |
5976 | } | |
5977 | ||
5978 | ||
5979 | /* Save statements have a special syntax. */ | |
5980 | ||
5981 | match | |
5982 | gfc_match_save (void) | |
5983 | { | |
9056bd70 TS |
5984 | char n[GFC_MAX_SYMBOL_LEN+1]; |
5985 | gfc_common_head *c; | |
6de9cd9a DN |
5986 | gfc_symbol *sym; |
5987 | match m; | |
5988 | ||
5989 | if (gfc_match_eos () == MATCH_YES) | |
5990 | { | |
5991 | if (gfc_current_ns->seen_save) | |
5992 | { | |
636dff67 SK |
5993 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
5994 | "follows previous SAVE statement") | |
09e87839 AL |
5995 | == FAILURE) |
5996 | return MATCH_ERROR; | |
6de9cd9a DN |
5997 | } |
5998 | ||
5999 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
6000 | return MATCH_YES; | |
6001 | } | |
6002 | ||
6003 | if (gfc_current_ns->save_all) | |
6004 | { | |
636dff67 SK |
6005 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
6006 | "blanket SAVE statement") | |
09e87839 AL |
6007 | == FAILURE) |
6008 | return MATCH_ERROR; | |
6de9cd9a DN |
6009 | } |
6010 | ||
6011 | gfc_match (" ::"); | |
6012 | ||
6013 | for (;;) | |
6014 | { | |
6015 | m = gfc_match_symbol (&sym, 0); | |
6016 | switch (m) | |
6017 | { | |
6018 | case MATCH_YES: | |
636dff67 SK |
6019 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
6020 | == FAILURE) | |
6de9cd9a DN |
6021 | return MATCH_ERROR; |
6022 | goto next_item; | |
6023 | ||
6024 | case MATCH_NO: | |
6025 | break; | |
6026 | ||
6027 | case MATCH_ERROR: | |
6028 | return MATCH_ERROR; | |
6029 | } | |
6030 | ||
9056bd70 | 6031 | m = gfc_match (" / %n /", &n); |
6de9cd9a DN |
6032 | if (m == MATCH_ERROR) |
6033 | return MATCH_ERROR; | |
6034 | if (m == MATCH_NO) | |
6035 | goto syntax; | |
6036 | ||
53814b8f | 6037 | c = gfc_get_common (n, 0); |
9056bd70 TS |
6038 | c->saved = 1; |
6039 | ||
6de9cd9a DN |
6040 | gfc_current_ns->seen_save = 1; |
6041 | ||
6042 | next_item: | |
6043 | if (gfc_match_eos () == MATCH_YES) | |
6044 | break; | |
6045 | if (gfc_match_char (',') != MATCH_YES) | |
6046 | goto syntax; | |
6047 | } | |
6048 | ||
6049 | return MATCH_YES; | |
6050 | ||
6051 | syntax: | |
6052 | gfc_error ("Syntax error in SAVE statement at %C"); | |
6053 | return MATCH_ERROR; | |
6054 | } | |
6055 | ||
6056 | ||
06469efd PT |
6057 | match |
6058 | gfc_match_value (void) | |
6059 | { | |
6060 | gfc_symbol *sym; | |
6061 | match m; | |
6062 | ||
636dff67 | 6063 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
06469efd PT |
6064 | == FAILURE) |
6065 | return MATCH_ERROR; | |
6066 | ||
6067 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6068 | { | |
6069 | return MATCH_ERROR; | |
6070 | } | |
6071 | ||
6072 | if (gfc_match_eos () == MATCH_YES) | |
6073 | goto syntax; | |
6074 | ||
6075 | for(;;) | |
6076 | { | |
6077 | m = gfc_match_symbol (&sym, 0); | |
6078 | switch (m) | |
6079 | { | |
6080 | case MATCH_YES: | |
636dff67 SK |
6081 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
6082 | == FAILURE) | |
06469efd PT |
6083 | return MATCH_ERROR; |
6084 | goto next_item; | |
6085 | ||
6086 | case MATCH_NO: | |
6087 | break; | |
6088 | ||
6089 | case MATCH_ERROR: | |
6090 | return MATCH_ERROR; | |
6091 | } | |
6092 | ||
6093 | next_item: | |
6094 | if (gfc_match_eos () == MATCH_YES) | |
6095 | break; | |
6096 | if (gfc_match_char (',') != MATCH_YES) | |
6097 | goto syntax; | |
6098 | } | |
6099 | ||
6100 | return MATCH_YES; | |
6101 | ||
6102 | syntax: | |
6103 | gfc_error ("Syntax error in VALUE statement at %C"); | |
6104 | return MATCH_ERROR; | |
6105 | } | |
6106 | ||
66e4ab31 | 6107 | |
775e6c3a TB |
6108 | match |
6109 | gfc_match_volatile (void) | |
6110 | { | |
6111 | gfc_symbol *sym; | |
6112 | match m; | |
6113 | ||
636dff67 | 6114 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
775e6c3a TB |
6115 | == FAILURE) |
6116 | return MATCH_ERROR; | |
6117 | ||
6118 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6119 | { | |
6120 | return MATCH_ERROR; | |
6121 | } | |
6122 | ||
6123 | if (gfc_match_eos () == MATCH_YES) | |
6124 | goto syntax; | |
6125 | ||
6126 | for(;;) | |
6127 | { | |
9bce3c1c TB |
6128 | /* VOLATILE is special because it can be added to host-associated |
6129 | symbols locally. */ | |
6130 | m = gfc_match_symbol (&sym, 1); | |
775e6c3a TB |
6131 | switch (m) |
6132 | { | |
6133 | case MATCH_YES: | |
636dff67 SK |
6134 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
6135 | == FAILURE) | |
775e6c3a TB |
6136 | return MATCH_ERROR; |
6137 | goto next_item; | |
6138 | ||
6139 | case MATCH_NO: | |
6140 | break; | |
6141 | ||
6142 | case MATCH_ERROR: | |
6143 | return MATCH_ERROR; | |
6144 | } | |
6145 | ||
6146 | next_item: | |
6147 | if (gfc_match_eos () == MATCH_YES) | |
6148 | break; | |
6149 | if (gfc_match_char (',') != MATCH_YES) | |
6150 | goto syntax; | |
6151 | } | |
6152 | ||
6153 | return MATCH_YES; | |
6154 | ||
6155 | syntax: | |
6156 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
6157 | return MATCH_ERROR; | |
6158 | } | |
6159 | ||
6160 | ||
6de9cd9a DN |
6161 | /* Match a module procedure statement. Note that we have to modify |
6162 | symbols in the parent's namespace because the current one was there | |
49de9e73 | 6163 | to receive symbols that are in an interface's formal argument list. */ |
6de9cd9a DN |
6164 | |
6165 | match | |
6166 | gfc_match_modproc (void) | |
6167 | { | |
6168 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6169 | gfc_symbol *sym; | |
6170 | match m; | |
060fca4a | 6171 | gfc_namespace *module_ns; |
2b77e908 | 6172 | gfc_interface *old_interface_head, *interface; |
6de9cd9a DN |
6173 | |
6174 | if (gfc_state_stack->state != COMP_INTERFACE | |
6175 | || gfc_state_stack->previous == NULL | |
129d15a3 JW |
6176 | || current_interface.type == INTERFACE_NAMELESS |
6177 | || current_interface.type == INTERFACE_ABSTRACT) | |
6de9cd9a | 6178 | { |
636dff67 SK |
6179 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
6180 | "interface"); | |
6de9cd9a DN |
6181 | return MATCH_ERROR; |
6182 | } | |
6183 | ||
060fca4a PT |
6184 | module_ns = gfc_current_ns->parent; |
6185 | for (; module_ns; module_ns = module_ns->parent) | |
6186 | if (module_ns->proc_name->attr.flavor == FL_MODULE) | |
6187 | break; | |
6188 | ||
6189 | if (module_ns == NULL) | |
6190 | return MATCH_ERROR; | |
6191 | ||
2b77e908 FXC |
6192 | /* Store the current state of the interface. We will need it if we |
6193 | end up with a syntax error and need to recover. */ | |
6194 | old_interface_head = gfc_current_interface_head (); | |
6195 | ||
6de9cd9a DN |
6196 | for (;;) |
6197 | { | |
2b77e908 FXC |
6198 | bool last = false; |
6199 | ||
6de9cd9a DN |
6200 | m = gfc_match_name (name); |
6201 | if (m == MATCH_NO) | |
6202 | goto syntax; | |
6203 | if (m != MATCH_YES) | |
6204 | return MATCH_ERROR; | |
6205 | ||
2b77e908 FXC |
6206 | /* Check for syntax error before starting to add symbols to the |
6207 | current namespace. */ | |
6208 | if (gfc_match_eos () == MATCH_YES) | |
6209 | last = true; | |
6210 | if (!last && gfc_match_char (',') != MATCH_YES) | |
6211 | goto syntax; | |
6212 | ||
6213 | /* Now we're sure the syntax is valid, we process this item | |
6214 | further. */ | |
060fca4a | 6215 | if (gfc_get_symbol (name, module_ns, &sym)) |
6de9cd9a DN |
6216 | return MATCH_ERROR; |
6217 | ||
6218 | if (sym->attr.proc != PROC_MODULE | |
231b2fcc TS |
6219 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
6220 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
6221 | return MATCH_ERROR; |
6222 | ||
6223 | if (gfc_add_interface (sym) == FAILURE) | |
6224 | return MATCH_ERROR; | |
6225 | ||
71f77fd7 PT |
6226 | sym->attr.mod_proc = 1; |
6227 | ||
2b77e908 | 6228 | if (last) |
6de9cd9a | 6229 | break; |
6de9cd9a DN |
6230 | } |
6231 | ||
6232 | return MATCH_YES; | |
6233 | ||
6234 | syntax: | |
2b77e908 FXC |
6235 | /* Restore the previous state of the interface. */ |
6236 | interface = gfc_current_interface_head (); | |
6237 | gfc_set_current_interface_head (old_interface_head); | |
6238 | ||
6239 | /* Free the new interfaces. */ | |
6240 | while (interface != old_interface_head) | |
6241 | { | |
6242 | gfc_interface *i = interface->next; | |
6243 | gfc_free (interface); | |
6244 | interface = i; | |
6245 | } | |
6246 | ||
6247 | /* And issue a syntax error. */ | |
6de9cd9a DN |
6248 | gfc_syntax_error (ST_MODULE_PROC); |
6249 | return MATCH_ERROR; | |
6250 | } | |
6251 | ||
6252 | ||
7d1f1e61 PT |
6253 | /* Check a derived type that is being extended. */ |
6254 | static gfc_symbol* | |
6255 | check_extended_derived_type (char *name) | |
6256 | { | |
6257 | gfc_symbol *extended; | |
6258 | ||
6259 | if (gfc_find_symbol (name, gfc_current_ns, 1, &extended)) | |
6260 | { | |
6261 | gfc_error ("Ambiguous symbol in TYPE definition at %C"); | |
6262 | return NULL; | |
6263 | } | |
6264 | ||
6265 | if (!extended) | |
6266 | { | |
6267 | gfc_error ("No such symbol in TYPE definition at %C"); | |
6268 | return NULL; | |
6269 | } | |
6270 | ||
6271 | if (extended->attr.flavor != FL_DERIVED) | |
6272 | { | |
6273 | gfc_error ("'%s' in EXTENDS expression at %C is not a " | |
6274 | "derived type", name); | |
6275 | return NULL; | |
6276 | } | |
6277 | ||
6278 | if (extended->attr.is_bind_c) | |
6279 | { | |
6280 | gfc_error ("'%s' cannot be extended at %C because it " | |
6281 | "is BIND(C)", extended->name); | |
6282 | return NULL; | |
6283 | } | |
6284 | ||
6285 | if (extended->attr.sequence) | |
6286 | { | |
6287 | gfc_error ("'%s' cannot be extended at %C because it " | |
6288 | "is a SEQUENCE type", extended->name); | |
6289 | return NULL; | |
6290 | } | |
6291 | ||
6292 | return extended; | |
6293 | } | |
6294 | ||
6295 | ||
a8b3b0b6 CR |
6296 | /* Match the optional attribute specifiers for a type declaration. |
6297 | Return MATCH_ERROR if an error is encountered in one of the handled | |
6298 | attributes (public, private, bind(c)), MATCH_NO if what's found is | |
6299 | not a handled attribute, and MATCH_YES otherwise. TODO: More error | |
6300 | checking on attribute conflicts needs to be done. */ | |
6de9cd9a DN |
6301 | |
6302 | match | |
7d1f1e61 | 6303 | gfc_get_type_attr_spec (symbol_attribute *attr, char *name) |
6de9cd9a | 6304 | { |
a8b3b0b6 | 6305 | /* See if the derived type is marked as private. */ |
6de9cd9a DN |
6306 | if (gfc_match (" , private") == MATCH_YES) |
6307 | { | |
d51347f9 | 6308 | if (gfc_current_state () != COMP_MODULE) |
6de9cd9a | 6309 | { |
d51347f9 TB |
6310 | gfc_error ("Derived type at %C can only be PRIVATE in the " |
6311 | "specification part of a module"); | |
6de9cd9a DN |
6312 | return MATCH_ERROR; |
6313 | } | |
6314 | ||
a8b3b0b6 | 6315 | if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
6de9cd9a | 6316 | return MATCH_ERROR; |
6de9cd9a | 6317 | } |
a8b3b0b6 | 6318 | else if (gfc_match (" , public") == MATCH_YES) |
6de9cd9a | 6319 | { |
d51347f9 | 6320 | if (gfc_current_state () != COMP_MODULE) |
6de9cd9a | 6321 | { |
d51347f9 TB |
6322 | gfc_error ("Derived type at %C can only be PUBLIC in the " |
6323 | "specification part of a module"); | |
6de9cd9a DN |
6324 | return MATCH_ERROR; |
6325 | } | |
6326 | ||
a8b3b0b6 | 6327 | if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
6de9cd9a | 6328 | return MATCH_ERROR; |
6de9cd9a | 6329 | } |
e7303e85 | 6330 | else if (gfc_match(" , bind ( c )") == MATCH_YES) |
a8b3b0b6 CR |
6331 | { |
6332 | /* If the type is defined to be bind(c) it then needs to make | |
6333 | sure that all fields are interoperable. This will | |
6334 | need to be a semantic check on the finished derived type. | |
6335 | See 15.2.3 (lines 9-12) of F2003 draft. */ | |
6336 | if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) | |
6337 | return MATCH_ERROR; | |
6338 | ||
6339 | /* TODO: attr conflicts need to be checked, probably in symbol.c. */ | |
6340 | } | |
7d1f1e61 PT |
6341 | else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES) |
6342 | { | |
6343 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: derived type " | |
6344 | "extended at %C") == FAILURE) | |
6345 | return MATCH_ERROR; | |
6346 | } | |
a8b3b0b6 CR |
6347 | else |
6348 | return MATCH_NO; | |
6349 | ||
6350 | /* If we get here, something matched. */ | |
6351 | return MATCH_YES; | |
6352 | } | |
6353 | ||
6354 | ||
6355 | /* Match the beginning of a derived type declaration. If a type name | |
6356 | was the result of a function, then it is possible to have a symbol | |
6357 | already to be known as a derived type yet have no components. */ | |
6358 | ||
6359 | match | |
6360 | gfc_match_derived_decl (void) | |
6361 | { | |
6362 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7d1f1e61 | 6363 | char parent[GFC_MAX_SYMBOL_LEN + 1]; |
a8b3b0b6 CR |
6364 | symbol_attribute attr; |
6365 | gfc_symbol *sym; | |
7d1f1e61 | 6366 | gfc_symbol *extended; |
a8b3b0b6 CR |
6367 | match m; |
6368 | match is_type_attr_spec = MATCH_NO; | |
e7303e85 | 6369 | bool seen_attr = false; |
a8b3b0b6 CR |
6370 | |
6371 | if (gfc_current_state () == COMP_DERIVED) | |
6372 | return MATCH_NO; | |
6373 | ||
7d1f1e61 PT |
6374 | name[0] = '\0'; |
6375 | parent[0] = '\0'; | |
a8b3b0b6 | 6376 | gfc_clear_attr (&attr); |
7d1f1e61 | 6377 | extended = NULL; |
a8b3b0b6 CR |
6378 | |
6379 | do | |
6380 | { | |
7d1f1e61 | 6381 | is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent); |
a8b3b0b6 CR |
6382 | if (is_type_attr_spec == MATCH_ERROR) |
6383 | return MATCH_ERROR; | |
e7303e85 FXC |
6384 | if (is_type_attr_spec == MATCH_YES) |
6385 | seen_attr = true; | |
a8b3b0b6 | 6386 | } while (is_type_attr_spec == MATCH_YES); |
6de9cd9a | 6387 | |
7d1f1e61 PT |
6388 | /* Deal with derived type extensions. */ |
6389 | if (parent[0]) | |
6390 | extended = check_extended_derived_type (parent); | |
6391 | ||
6392 | if (parent[0] && !extended) | |
6393 | return MATCH_ERROR; | |
6394 | ||
e7303e85 | 6395 | if (gfc_match (" ::") != MATCH_YES && seen_attr) |
6de9cd9a DN |
6396 | { |
6397 | gfc_error ("Expected :: in TYPE definition at %C"); | |
6398 | return MATCH_ERROR; | |
6399 | } | |
6400 | ||
6401 | m = gfc_match (" %n%t", name); | |
6402 | if (m != MATCH_YES) | |
6403 | return m; | |
6404 | ||
e9c06563 TB |
6405 | /* Make sure the name is not the name of an intrinsic type. */ |
6406 | if (gfc_is_intrinsic_typename (name)) | |
6de9cd9a | 6407 | { |
636dff67 SK |
6408 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
6409 | "type", name); | |
6de9cd9a DN |
6410 | return MATCH_ERROR; |
6411 | } | |
6412 | ||
6413 | if (gfc_get_symbol (name, NULL, &sym)) | |
6414 | return MATCH_ERROR; | |
6415 | ||
6416 | if (sym->ts.type != BT_UNKNOWN) | |
6417 | { | |
6418 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
6419 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
6420 | return MATCH_ERROR; | |
6421 | } | |
6422 | ||
6423 | /* The symbol may already have the derived attribute without the | |
6424 | components. The ways this can happen is via a function | |
6425 | definition, an INTRINSIC statement or a subtype in another | |
6426 | derived type that is a pointer. The first part of the AND clause | |
df2fba9e | 6427 | is true if the symbol is not the return value of a function. */ |
6de9cd9a | 6428 | if (sym->attr.flavor != FL_DERIVED |
231b2fcc | 6429 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
6430 | return MATCH_ERROR; |
6431 | ||
9fa6b0af | 6432 | if (sym->components != NULL || sym->attr.zero_comp) |
6de9cd9a | 6433 | { |
636dff67 SK |
6434 | gfc_error ("Derived type definition of '%s' at %C has already been " |
6435 | "defined", sym->name); | |
6de9cd9a DN |
6436 | return MATCH_ERROR; |
6437 | } | |
6438 | ||
6439 | if (attr.access != ACCESS_UNKNOWN | |
231b2fcc | 6440 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
6441 | return MATCH_ERROR; |
6442 | ||
a8b3b0b6 CR |
6443 | /* See if the derived type was labeled as bind(c). */ |
6444 | if (attr.is_bind_c != 0) | |
6445 | sym->attr.is_bind_c = attr.is_bind_c; | |
6446 | ||
7d1f1e61 | 6447 | |
34523524 DK |
6448 | /* Construct the f2k_derived namespace if it is not yet there. */ |
6449 | if (!sym->f2k_derived) | |
6450 | sym->f2k_derived = gfc_get_namespace (NULL, 0); | |
6451 | ||
7d1f1e61 PT |
6452 | |
6453 | if (extended && !sym->components) | |
6454 | { | |
6455 | gfc_component *p; | |
6456 | gfc_symtree *st; | |
6457 | ||
6458 | /* Add the extended derived type as the first component. */ | |
6459 | gfc_add_component (sym, parent, &p); | |
6460 | sym->attr.extension = 1; | |
6461 | extended->refs++; | |
6462 | gfc_set_sym_referenced (extended); | |
6463 | ||
6464 | p->ts.type = BT_DERIVED; | |
6465 | p->ts.derived = extended; | |
6466 | p->initializer = gfc_default_initializer (&p->ts); | |
6467 | ||
6468 | /* Provide the links between the extended type and its extension. */ | |
6469 | if (!extended->f2k_derived) | |
6470 | extended->f2k_derived = gfc_get_namespace (NULL, 0); | |
6471 | st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name); | |
6472 | st->n.sym = sym; | |
6473 | } | |
6474 | ||
6de9cd9a DN |
6475 | gfc_new_block = sym; |
6476 | ||
6477 | return MATCH_YES; | |
6478 | } | |
83d890b9 AL |
6479 | |
6480 | ||
6481 | /* Cray Pointees can be declared as: | |
6482 | pointer (ipt, a (n,m,...,*)) | |
6483 | By default, this is treated as an AS_ASSUMED_SIZE array. We'll | |
6484 | cheat and set a constant bound of 1 for the last dimension, if this | |
6485 | is the case. Since there is no bounds-checking for Cray Pointees, | |
6486 | this will be okay. */ | |
6487 | ||
17b1d2a0 | 6488 | gfc_try |
83d890b9 AL |
6489 | gfc_mod_pointee_as (gfc_array_spec *as) |
6490 | { | |
6491 | as->cray_pointee = true; /* This will be useful to know later. */ | |
6492 | if (as->type == AS_ASSUMED_SIZE) | |
6493 | { | |
6494 | as->type = AS_EXPLICIT; | |
6495 | as->upper[as->rank - 1] = gfc_int_expr (1); | |
6496 | as->cp_was_assumed = true; | |
6497 | } | |
6498 | else if (as->type == AS_ASSUMED_SHAPE) | |
6499 | { | |
6500 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
6501 | return MATCH_ERROR; | |
6502 | } | |
6503 | return MATCH_YES; | |
6504 | } | |
25d8f0a2 TS |
6505 | |
6506 | ||
6507 | /* Match the enum definition statement, here we are trying to match | |
6508 | the first line of enum definition statement. | |
6509 | Returns MATCH_YES if match is found. */ | |
6510 | ||
6511 | match | |
6512 | gfc_match_enum (void) | |
6513 | { | |
6514 | match m; | |
6515 | ||
6516 | m = gfc_match_eos (); | |
6517 | if (m != MATCH_YES) | |
6518 | return m; | |
6519 | ||
6133c68a | 6520 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") |
25d8f0a2 TS |
6521 | == FAILURE) |
6522 | return MATCH_ERROR; | |
6523 | ||
6524 | return MATCH_YES; | |
6525 | } | |
6526 | ||
6527 | ||
6133c68a TS |
6528 | /* Match a variable name with an optional initializer. When this |
6529 | subroutine is called, a variable is expected to be parsed next. | |
6530 | Depending on what is happening at the moment, updates either the | |
6531 | symbol table or the current interface. */ | |
6532 | ||
6533 | static match | |
6534 | enumerator_decl (void) | |
6535 | { | |
6536 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6537 | gfc_expr *initializer; | |
6538 | gfc_array_spec *as = NULL; | |
6539 | gfc_symbol *sym; | |
6540 | locus var_locus; | |
6541 | match m; | |
17b1d2a0 | 6542 | gfc_try t; |
6133c68a TS |
6543 | locus old_locus; |
6544 | ||
6545 | initializer = NULL; | |
6546 | old_locus = gfc_current_locus; | |
6547 | ||
6548 | /* When we get here, we've just matched a list of attributes and | |
6549 | maybe a type and a double colon. The next thing we expect to see | |
6550 | is the name of the symbol. */ | |
6551 | m = gfc_match_name (name); | |
6552 | if (m != MATCH_YES) | |
6553 | goto cleanup; | |
6554 | ||
6555 | var_locus = gfc_current_locus; | |
6556 | ||
6557 | /* OK, we've successfully matched the declaration. Now put the | |
6558 | symbol in the current namespace. If we fail to create the symbol, | |
6559 | bail out. */ | |
6560 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
6561 | { | |
6562 | m = MATCH_ERROR; | |
6563 | goto cleanup; | |
6564 | } | |
6565 | ||
6566 | /* The double colon must be present in order to have initializers. | |
6567 | Otherwise the statement is ambiguous with an assignment statement. */ | |
6568 | if (colon_seen) | |
6569 | { | |
6570 | if (gfc_match_char ('=') == MATCH_YES) | |
6571 | { | |
6572 | m = gfc_match_init_expr (&initializer); | |
6573 | if (m == MATCH_NO) | |
6574 | { | |
6575 | gfc_error ("Expected an initialization expression at %C"); | |
6576 | m = MATCH_ERROR; | |
6577 | } | |
6578 | ||
6579 | if (m != MATCH_YES) | |
6580 | goto cleanup; | |
6581 | } | |
6582 | } | |
6583 | ||
6584 | /* If we do not have an initializer, the initialization value of the | |
6585 | previous enumerator (stored in last_initializer) is incremented | |
6586 | by 1 and is used to initialize the current enumerator. */ | |
6587 | if (initializer == NULL) | |
6588 | initializer = gfc_enum_initializer (last_initializer, old_locus); | |
d51347f9 | 6589 | |
6133c68a TS |
6590 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
6591 | { | |
6592 | gfc_error("ENUMERATOR %L not initialized with integer expression", | |
6593 | &var_locus); | |
d51347f9 | 6594 | m = MATCH_ERROR; |
6133c68a TS |
6595 | gfc_free_enum_history (); |
6596 | goto cleanup; | |
6597 | } | |
6598 | ||
6599 | /* Store this current initializer, for the next enumerator variable | |
6600 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
6601 | use last_initializer below. */ | |
6602 | last_initializer = initializer; | |
6603 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
6604 | ||
6605 | /* Maintain enumerator history. */ | |
6606 | gfc_find_symbol (name, NULL, 0, &sym); | |
6607 | create_enum_history (sym, last_initializer); | |
6608 | ||
6609 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
6610 | ||
6611 | cleanup: | |
6612 | /* Free stuff up and return. */ | |
6613 | gfc_free_expr (initializer); | |
6614 | ||
6615 | return m; | |
6616 | } | |
6617 | ||
6618 | ||
66e4ab31 | 6619 | /* Match the enumerator definition statement. */ |
25d8f0a2 TS |
6620 | |
6621 | match | |
6622 | gfc_match_enumerator_def (void) | |
6623 | { | |
6624 | match m; | |
17b1d2a0 | 6625 | gfc_try t; |
d51347f9 | 6626 | |
25d8f0a2 | 6627 | gfc_clear_ts (¤t_ts); |
d51347f9 | 6628 | |
25d8f0a2 TS |
6629 | m = gfc_match (" enumerator"); |
6630 | if (m != MATCH_YES) | |
6631 | return m; | |
6133c68a TS |
6632 | |
6633 | m = gfc_match (" :: "); | |
6634 | if (m == MATCH_ERROR) | |
6635 | return m; | |
6636 | ||
6637 | colon_seen = (m == MATCH_YES); | |
d51347f9 | 6638 | |
25d8f0a2 TS |
6639 | if (gfc_current_state () != COMP_ENUM) |
6640 | { | |
6641 | gfc_error ("ENUM definition statement expected before %C"); | |
6642 | gfc_free_enum_history (); | |
6643 | return MATCH_ERROR; | |
6644 | } | |
6645 | ||
6646 | (¤t_ts)->type = BT_INTEGER; | |
6647 | (¤t_ts)->kind = gfc_c_int_kind; | |
d51347f9 | 6648 | |
6133c68a TS |
6649 | gfc_clear_attr (¤t_attr); |
6650 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
6651 | if (t == FAILURE) | |
25d8f0a2 | 6652 | { |
6133c68a | 6653 | m = MATCH_ERROR; |
25d8f0a2 TS |
6654 | goto cleanup; |
6655 | } | |
6656 | ||
25d8f0a2 TS |
6657 | for (;;) |
6658 | { | |
6133c68a | 6659 | m = enumerator_decl (); |
25d8f0a2 TS |
6660 | if (m == MATCH_ERROR) |
6661 | goto cleanup; | |
6662 | if (m == MATCH_NO) | |
6663 | break; | |
6664 | ||
6665 | if (gfc_match_eos () == MATCH_YES) | |
6666 | goto cleanup; | |
6667 | if (gfc_match_char (',') != MATCH_YES) | |
6668 | break; | |
6669 | } | |
6670 | ||
6671 | if (gfc_current_state () == COMP_ENUM) | |
6672 | { | |
6673 | gfc_free_enum_history (); | |
6674 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
6675 | m = MATCH_ERROR; | |
6676 | } | |
6677 | ||
6678 | cleanup: | |
6679 | gfc_free_array_spec (current_as); | |
6680 | current_as = NULL; | |
6681 | return m; | |
6682 | ||
6683 | } | |
6684 | ||
f6fad28e | 6685 | |
34523524 DK |
6686 | /* Match a FINAL declaration inside a derived type. */ |
6687 | ||
6688 | match | |
6689 | gfc_match_final_decl (void) | |
6690 | { | |
6691 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6692 | gfc_symbol* sym; | |
6693 | match m; | |
6694 | gfc_namespace* module_ns; | |
6695 | bool first, last; | |
6696 | ||
6697 | if (gfc_state_stack->state != COMP_DERIVED) | |
6698 | { | |
6699 | gfc_error ("FINAL declaration at %C must be inside a derived type " | |
6700 | "definition!"); | |
6701 | return MATCH_ERROR; | |
6702 | } | |
6703 | ||
6704 | gcc_assert (gfc_current_block ()); | |
6705 | ||
6706 | if (!gfc_state_stack->previous | |
6707 | || gfc_state_stack->previous->state != COMP_MODULE) | |
6708 | { | |
6709 | gfc_error ("Derived type declaration with FINAL at %C must be in the" | |
6710 | " specification part of a MODULE"); | |
6711 | return MATCH_ERROR; | |
6712 | } | |
6713 | ||
6714 | module_ns = gfc_current_ns; | |
6715 | gcc_assert (module_ns); | |
6716 | gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE); | |
6717 | ||
6718 | /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */ | |
6719 | if (gfc_match (" ::") == MATCH_ERROR) | |
6720 | return MATCH_ERROR; | |
6721 | ||
6722 | /* Match the sequence of procedure names. */ | |
6723 | first = true; | |
6724 | last = false; | |
6725 | do | |
6726 | { | |
6727 | gfc_finalizer* f; | |
6728 | ||
6729 | if (first && gfc_match_eos () == MATCH_YES) | |
6730 | { | |
6731 | gfc_error ("Empty FINAL at %C"); | |
6732 | return MATCH_ERROR; | |
6733 | } | |
6734 | ||
6735 | m = gfc_match_name (name); | |
6736 | if (m == MATCH_NO) | |
6737 | { | |
6738 | gfc_error ("Expected module procedure name at %C"); | |
6739 | return MATCH_ERROR; | |
6740 | } | |
6741 | else if (m != MATCH_YES) | |
6742 | return MATCH_ERROR; | |
6743 | ||
6744 | if (gfc_match_eos () == MATCH_YES) | |
6745 | last = true; | |
6746 | if (!last && gfc_match_char (',') != MATCH_YES) | |
6747 | { | |
6748 | gfc_error ("Expected ',' at %C"); | |
6749 | return MATCH_ERROR; | |
6750 | } | |
6751 | ||
6752 | if (gfc_get_symbol (name, module_ns, &sym)) | |
6753 | { | |
6754 | gfc_error ("Unknown procedure name \"%s\" at %C", name); | |
6755 | return MATCH_ERROR; | |
6756 | } | |
6757 | ||
6758 | /* Mark the symbol as module procedure. */ | |
6759 | if (sym->attr.proc != PROC_MODULE | |
6760 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
6761 | sym->name, NULL) == FAILURE) | |
6762 | return MATCH_ERROR; | |
6763 | ||
6764 | /* Check if we already have this symbol in the list, this is an error. */ | |
6765 | for (f = gfc_current_block ()->f2k_derived->finalizers; f; f = f->next) | |
f6fad28e | 6766 | if (f->proc_sym == sym) |
34523524 DK |
6767 | { |
6768 | gfc_error ("'%s' at %C is already defined as FINAL procedure!", | |
6769 | name); | |
6770 | return MATCH_ERROR; | |
6771 | } | |
6772 | ||
6773 | /* Add this symbol to the list of finalizers. */ | |
6774 | gcc_assert (gfc_current_block ()->f2k_derived); | |
6775 | ++sym->refs; | |
ece3f663 | 6776 | f = XCNEW (gfc_finalizer); |
f6fad28e DK |
6777 | f->proc_sym = sym; |
6778 | f->proc_tree = NULL; | |
34523524 DK |
6779 | f->where = gfc_current_locus; |
6780 | f->next = gfc_current_block ()->f2k_derived->finalizers; | |
6781 | gfc_current_block ()->f2k_derived->finalizers = f; | |
6782 | ||
6783 | first = false; | |
6784 | } | |
6785 | while (!last); | |
6786 | ||
6787 | return MATCH_YES; | |
6788 | } |