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6de9cd9a | 1 | /* Declaration statement matcher |
7fcd5ad5 | 2 | Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
636dff67 | 3 | Free Software Foundation, Inc. |
6de9cd9a DN |
4 | Contributed by Andy Vaught |
5 | ||
9fc4d79b | 6 | This file is part of GCC. |
6de9cd9a | 7 | |
9fc4d79b TS |
8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
d234d788 | 10 | Software Foundation; either version 3, or (at your option) any later |
9fc4d79b | 11 | version. |
6de9cd9a | 12 | |
9fc4d79b TS |
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
6de9cd9a DN |
17 | |
18 | You should have received a copy of the GNU General Public License | |
d234d788 NC |
19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a | 21 | |
6de9cd9a | 22 | #include "config.h" |
d22e4895 | 23 | #include "system.h" |
6de9cd9a DN |
24 | #include "gfortran.h" |
25 | #include "match.h" | |
26 | #include "parse.h" | |
cab129d1 | 27 | #include "flags.h" |
6de9cd9a | 28 | |
ca39e6f2 FXC |
29 | |
30 | /* Macros to access allocate memory for gfc_data_variable, | |
31 | gfc_data_value and gfc_data. */ | |
ece3f663 KG |
32 | #define gfc_get_data_variable() XCNEW (gfc_data_variable) |
33 | #define gfc_get_data_value() XCNEW (gfc_data_value) | |
34 | #define gfc_get_data() XCNEW (gfc_data) | |
ca39e6f2 FXC |
35 | |
36 | ||
2054fc29 | 37 | /* This flag is set if an old-style length selector is matched |
6de9cd9a DN |
38 | during a type-declaration statement. */ |
39 | ||
40 | static int old_char_selector; | |
41 | ||
46fa431d | 42 | /* When variables acquire types and attributes from a declaration |
6de9cd9a DN |
43 | statement, they get them from the following static variables. The |
44 | first part of a declaration sets these variables and the second | |
45 | part copies these into symbol structures. */ | |
46 | ||
47 | static gfc_typespec current_ts; | |
48 | ||
49 | static symbol_attribute current_attr; | |
50 | static gfc_array_spec *current_as; | |
51 | static int colon_seen; | |
52 | ||
a8b3b0b6 CR |
53 | /* The current binding label (if any). */ |
54 | static char curr_binding_label[GFC_MAX_BINDING_LABEL_LEN + 1]; | |
55 | /* Need to know how many identifiers are on the current data declaration | |
56 | line in case we're given the BIND(C) attribute with a NAME= specifier. */ | |
57 | static int num_idents_on_line; | |
58 | /* Need to know if a NAME= specifier was found during gfc_match_bind_c so we | |
59 | can supply a name if the curr_binding_label is nil and NAME= was not. */ | |
60 | static int has_name_equals = 0; | |
61 | ||
25d8f0a2 TS |
62 | /* Initializer of the previous enumerator. */ |
63 | ||
64 | static gfc_expr *last_initializer; | |
65 | ||
66 | /* History of all the enumerators is maintained, so that | |
67 | kind values of all the enumerators could be updated depending | |
68 | upon the maximum initialized value. */ | |
69 | ||
70 | typedef struct enumerator_history | |
71 | { | |
72 | gfc_symbol *sym; | |
73 | gfc_expr *initializer; | |
74 | struct enumerator_history *next; | |
75 | } | |
76 | enumerator_history; | |
77 | ||
78 | /* Header of enum history chain. */ | |
79 | ||
80 | static enumerator_history *enum_history = NULL; | |
81 | ||
82 | /* Pointer of enum history node containing largest initializer. */ | |
83 | ||
84 | static enumerator_history *max_enum = NULL; | |
85 | ||
6de9cd9a DN |
86 | /* gfc_new_block points to the symbol of a newly matched block. */ |
87 | ||
88 | gfc_symbol *gfc_new_block; | |
89 | ||
1c8bcdf7 | 90 | bool gfc_matching_function; |
e2d29968 | 91 | |
6de9cd9a | 92 | |
294fbfc8 TS |
93 | /********************* DATA statement subroutines *********************/ |
94 | ||
2220652d PT |
95 | static bool in_match_data = false; |
96 | ||
97 | bool | |
98 | gfc_in_match_data (void) | |
99 | { | |
100 | return in_match_data; | |
101 | } | |
102 | ||
ca39e6f2 FXC |
103 | static void |
104 | set_in_match_data (bool set_value) | |
2220652d PT |
105 | { |
106 | in_match_data = set_value; | |
107 | } | |
108 | ||
294fbfc8 TS |
109 | /* Free a gfc_data_variable structure and everything beneath it. */ |
110 | ||
111 | static void | |
636dff67 | 112 | free_variable (gfc_data_variable *p) |
294fbfc8 TS |
113 | { |
114 | gfc_data_variable *q; | |
115 | ||
116 | for (; p; p = q) | |
117 | { | |
118 | q = p->next; | |
119 | gfc_free_expr (p->expr); | |
120 | gfc_free_iterator (&p->iter, 0); | |
121 | free_variable (p->list); | |
294fbfc8 TS |
122 | gfc_free (p); |
123 | } | |
124 | } | |
125 | ||
126 | ||
127 | /* Free a gfc_data_value structure and everything beneath it. */ | |
128 | ||
129 | static void | |
636dff67 | 130 | free_value (gfc_data_value *p) |
294fbfc8 TS |
131 | { |
132 | gfc_data_value *q; | |
133 | ||
134 | for (; p; p = q) | |
135 | { | |
136 | q = p->next; | |
137 | gfc_free_expr (p->expr); | |
138 | gfc_free (p); | |
139 | } | |
140 | } | |
141 | ||
142 | ||
143 | /* Free a list of gfc_data structures. */ | |
144 | ||
145 | void | |
636dff67 | 146 | gfc_free_data (gfc_data *p) |
294fbfc8 TS |
147 | { |
148 | gfc_data *q; | |
149 | ||
150 | for (; p; p = q) | |
151 | { | |
152 | q = p->next; | |
294fbfc8 TS |
153 | free_variable (p->var); |
154 | free_value (p->value); | |
294fbfc8 TS |
155 | gfc_free (p); |
156 | } | |
157 | } | |
158 | ||
159 | ||
a9f6f1f2 | 160 | /* Free all data in a namespace. */ |
636dff67 | 161 | |
a9f6f1f2 | 162 | static void |
66e4ab31 | 163 | gfc_free_data_all (gfc_namespace *ns) |
a9f6f1f2 JD |
164 | { |
165 | gfc_data *d; | |
166 | ||
167 | for (;ns->data;) | |
168 | { | |
169 | d = ns->data->next; | |
170 | gfc_free (ns->data); | |
171 | ns->data = d; | |
172 | } | |
173 | } | |
174 | ||
175 | ||
294fbfc8 TS |
176 | static match var_element (gfc_data_variable *); |
177 | ||
178 | /* Match a list of variables terminated by an iterator and a right | |
179 | parenthesis. */ | |
180 | ||
181 | static match | |
636dff67 | 182 | var_list (gfc_data_variable *parent) |
294fbfc8 TS |
183 | { |
184 | gfc_data_variable *tail, var; | |
185 | match m; | |
186 | ||
187 | m = var_element (&var); | |
188 | if (m == MATCH_ERROR) | |
189 | return MATCH_ERROR; | |
190 | if (m == MATCH_NO) | |
191 | goto syntax; | |
192 | ||
193 | tail = gfc_get_data_variable (); | |
194 | *tail = var; | |
195 | ||
196 | parent->list = tail; | |
197 | ||
198 | for (;;) | |
199 | { | |
200 | if (gfc_match_char (',') != MATCH_YES) | |
201 | goto syntax; | |
202 | ||
203 | m = gfc_match_iterator (&parent->iter, 1); | |
204 | if (m == MATCH_YES) | |
205 | break; | |
206 | if (m == MATCH_ERROR) | |
207 | return MATCH_ERROR; | |
208 | ||
209 | m = var_element (&var); | |
210 | if (m == MATCH_ERROR) | |
211 | return MATCH_ERROR; | |
212 | if (m == MATCH_NO) | |
213 | goto syntax; | |
214 | ||
215 | tail->next = gfc_get_data_variable (); | |
216 | tail = tail->next; | |
217 | ||
218 | *tail = var; | |
219 | } | |
220 | ||
221 | if (gfc_match_char (')') != MATCH_YES) | |
222 | goto syntax; | |
223 | return MATCH_YES; | |
224 | ||
225 | syntax: | |
226 | gfc_syntax_error (ST_DATA); | |
227 | return MATCH_ERROR; | |
228 | } | |
229 | ||
230 | ||
231 | /* Match a single element in a data variable list, which can be a | |
232 | variable-iterator list. */ | |
233 | ||
234 | static match | |
7b901ac4 | 235 | var_element (gfc_data_variable *new_var) |
294fbfc8 TS |
236 | { |
237 | match m; | |
238 | gfc_symbol *sym; | |
239 | ||
7b901ac4 | 240 | memset (new_var, 0, sizeof (gfc_data_variable)); |
294fbfc8 TS |
241 | |
242 | if (gfc_match_char ('(') == MATCH_YES) | |
7b901ac4 | 243 | return var_list (new_var); |
294fbfc8 | 244 | |
7b901ac4 | 245 | m = gfc_match_variable (&new_var->expr, 0); |
294fbfc8 TS |
246 | if (m != MATCH_YES) |
247 | return m; | |
248 | ||
7b901ac4 | 249 | sym = new_var->expr->symtree->n.sym; |
294fbfc8 | 250 | |
f37e928c DK |
251 | /* Symbol should already have an associated type. */ |
252 | if (gfc_check_symbol_typed (sym, gfc_current_ns, | |
253 | false, gfc_current_locus) == FAILURE) | |
254 | return MATCH_ERROR; | |
255 | ||
636dff67 SK |
256 | if (!sym->attr.function && gfc_current_ns->parent |
257 | && gfc_current_ns->parent == sym->ns) | |
294fbfc8 | 258 | { |
4075a94e | 259 | gfc_error ("Host associated variable '%s' may not be in the DATA " |
e25a0da3 | 260 | "statement at %C", sym->name); |
294fbfc8 TS |
261 | return MATCH_ERROR; |
262 | } | |
263 | ||
4075a94e | 264 | if (gfc_current_state () != COMP_BLOCK_DATA |
636dff67 SK |
265 | && sym->attr.in_common |
266 | && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of " | |
267 | "common block variable '%s' in DATA statement at %C", | |
268 | sym->name) == FAILURE) | |
4075a94e | 269 | return MATCH_ERROR; |
294fbfc8 | 270 | |
7b901ac4 | 271 | if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE) |
294fbfc8 TS |
272 | return MATCH_ERROR; |
273 | ||
274 | return MATCH_YES; | |
275 | } | |
276 | ||
277 | ||
278 | /* Match the top-level list of data variables. */ | |
279 | ||
280 | static match | |
636dff67 | 281 | top_var_list (gfc_data *d) |
294fbfc8 | 282 | { |
7b901ac4 | 283 | gfc_data_variable var, *tail, *new_var; |
294fbfc8 TS |
284 | match m; |
285 | ||
286 | tail = NULL; | |
287 | ||
288 | for (;;) | |
289 | { | |
290 | m = var_element (&var); | |
291 | if (m == MATCH_NO) | |
292 | goto syntax; | |
293 | if (m == MATCH_ERROR) | |
294 | return MATCH_ERROR; | |
295 | ||
7b901ac4 KG |
296 | new_var = gfc_get_data_variable (); |
297 | *new_var = var; | |
294fbfc8 TS |
298 | |
299 | if (tail == NULL) | |
7b901ac4 | 300 | d->var = new_var; |
294fbfc8 | 301 | else |
7b901ac4 | 302 | tail->next = new_var; |
294fbfc8 | 303 | |
7b901ac4 | 304 | tail = new_var; |
294fbfc8 TS |
305 | |
306 | if (gfc_match_char ('/') == MATCH_YES) | |
307 | break; | |
308 | if (gfc_match_char (',') != MATCH_YES) | |
309 | goto syntax; | |
310 | } | |
311 | ||
312 | return MATCH_YES; | |
313 | ||
314 | syntax: | |
315 | gfc_syntax_error (ST_DATA); | |
a9f6f1f2 | 316 | gfc_free_data_all (gfc_current_ns); |
294fbfc8 TS |
317 | return MATCH_ERROR; |
318 | } | |
319 | ||
320 | ||
321 | static match | |
636dff67 | 322 | match_data_constant (gfc_expr **result) |
294fbfc8 TS |
323 | { |
324 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
325 | gfc_symbol *sym; | |
326 | gfc_expr *expr; | |
327 | match m; | |
36d3fb4c | 328 | locus old_loc; |
294fbfc8 TS |
329 | |
330 | m = gfc_match_literal_constant (&expr, 1); | |
331 | if (m == MATCH_YES) | |
332 | { | |
333 | *result = expr; | |
334 | return MATCH_YES; | |
335 | } | |
336 | ||
337 | if (m == MATCH_ERROR) | |
338 | return MATCH_ERROR; | |
339 | ||
340 | m = gfc_match_null (result); | |
341 | if (m != MATCH_NO) | |
342 | return m; | |
343 | ||
36d3fb4c PT |
344 | old_loc = gfc_current_locus; |
345 | ||
346 | /* Should this be a structure component, try to match it | |
347 | before matching a name. */ | |
348 | m = gfc_match_rvalue (result); | |
349 | if (m == MATCH_ERROR) | |
350 | return m; | |
351 | ||
352 | if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE) | |
353 | { | |
354 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
355 | m = MATCH_ERROR; | |
356 | return m; | |
357 | } | |
358 | ||
359 | gfc_current_locus = old_loc; | |
360 | ||
294fbfc8 TS |
361 | m = gfc_match_name (name); |
362 | if (m != MATCH_YES) | |
363 | return m; | |
364 | ||
365 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
366 | return MATCH_ERROR; | |
367 | ||
368 | if (sym == NULL | |
369 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
370 | { | |
371 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
372 | name); | |
373 | return MATCH_ERROR; | |
374 | } | |
375 | else if (sym->attr.flavor == FL_DERIVED) | |
7d1f1e61 | 376 | return gfc_match_structure_constructor (sym, result, false); |
294fbfc8 | 377 | |
d46e0870 JD |
378 | /* Check to see if the value is an initialization array expression. */ |
379 | if (sym->value->expr_type == EXPR_ARRAY) | |
380 | { | |
381 | gfc_current_locus = old_loc; | |
382 | ||
383 | m = gfc_match_init_expr (result); | |
384 | if (m == MATCH_ERROR) | |
385 | return m; | |
386 | ||
387 | if (m == MATCH_YES) | |
388 | { | |
389 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
390 | m = MATCH_ERROR; | |
391 | ||
392 | if ((*result)->expr_type == EXPR_CONSTANT) | |
393 | return m; | |
394 | else | |
395 | { | |
396 | gfc_error ("Invalid initializer %s in Data statement at %C", name); | |
397 | return MATCH_ERROR; | |
398 | } | |
399 | } | |
400 | } | |
401 | ||
294fbfc8 TS |
402 | *result = gfc_copy_expr (sym->value); |
403 | return MATCH_YES; | |
404 | } | |
405 | ||
406 | ||
407 | /* Match a list of values in a DATA statement. The leading '/' has | |
408 | already been seen at this point. */ | |
409 | ||
410 | static match | |
636dff67 | 411 | top_val_list (gfc_data *data) |
294fbfc8 | 412 | { |
7b901ac4 | 413 | gfc_data_value *new_val, *tail; |
294fbfc8 | 414 | gfc_expr *expr; |
294fbfc8 TS |
415 | match m; |
416 | ||
417 | tail = NULL; | |
418 | ||
419 | for (;;) | |
420 | { | |
421 | m = match_data_constant (&expr); | |
422 | if (m == MATCH_NO) | |
423 | goto syntax; | |
424 | if (m == MATCH_ERROR) | |
425 | return MATCH_ERROR; | |
426 | ||
7b901ac4 KG |
427 | new_val = gfc_get_data_value (); |
428 | mpz_init (new_val->repeat); | |
294fbfc8 TS |
429 | |
430 | if (tail == NULL) | |
7b901ac4 | 431 | data->value = new_val; |
294fbfc8 | 432 | else |
7b901ac4 | 433 | tail->next = new_val; |
294fbfc8 | 434 | |
7b901ac4 | 435 | tail = new_val; |
294fbfc8 TS |
436 | |
437 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
438 | { | |
439 | tail->expr = expr; | |
f2112868 | 440 | mpz_set_ui (tail->repeat, 1); |
294fbfc8 TS |
441 | } |
442 | else | |
443 | { | |
f2112868 SK |
444 | if (expr->ts.type == BT_INTEGER) |
445 | mpz_set (tail->repeat, expr->value.integer); | |
294fbfc8 | 446 | gfc_free_expr (expr); |
294fbfc8 TS |
447 | |
448 | m = match_data_constant (&tail->expr); | |
449 | if (m == MATCH_NO) | |
450 | goto syntax; | |
451 | if (m == MATCH_ERROR) | |
452 | return MATCH_ERROR; | |
453 | } | |
454 | ||
455 | if (gfc_match_char ('/') == MATCH_YES) | |
456 | break; | |
457 | if (gfc_match_char (',') == MATCH_NO) | |
458 | goto syntax; | |
459 | } | |
460 | ||
461 | return MATCH_YES; | |
462 | ||
463 | syntax: | |
464 | gfc_syntax_error (ST_DATA); | |
a9f6f1f2 | 465 | gfc_free_data_all (gfc_current_ns); |
294fbfc8 TS |
466 | return MATCH_ERROR; |
467 | } | |
468 | ||
469 | ||
470 | /* Matches an old style initialization. */ | |
471 | ||
472 | static match | |
473 | match_old_style_init (const char *name) | |
474 | { | |
475 | match m; | |
476 | gfc_symtree *st; | |
ed0e3607 | 477 | gfc_symbol *sym; |
294fbfc8 TS |
478 | gfc_data *newdata; |
479 | ||
480 | /* Set up data structure to hold initializers. */ | |
481 | gfc_find_sym_tree (name, NULL, 0, &st); | |
ed0e3607 AL |
482 | sym = st->n.sym; |
483 | ||
294fbfc8 TS |
484 | newdata = gfc_get_data (); |
485 | newdata->var = gfc_get_data_variable (); | |
486 | newdata->var->expr = gfc_get_variable_expr (st); | |
8c5c0b80 | 487 | newdata->where = gfc_current_locus; |
294fbfc8 | 488 | |
66e4ab31 | 489 | /* Match initial value list. This also eats the terminal '/'. */ |
294fbfc8 TS |
490 | m = top_val_list (newdata); |
491 | if (m != MATCH_YES) | |
492 | { | |
493 | gfc_free (newdata); | |
494 | return m; | |
495 | } | |
496 | ||
497 | if (gfc_pure (NULL)) | |
498 | { | |
499 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
500 | gfc_free (newdata); | |
501 | return MATCH_ERROR; | |
502 | } | |
503 | ||
ed0e3607 AL |
504 | /* Mark the variable as having appeared in a data statement. */ |
505 | if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) | |
506 | { | |
507 | gfc_free (newdata); | |
508 | return MATCH_ERROR; | |
509 | } | |
510 | ||
294fbfc8 TS |
511 | /* Chain in namespace list of DATA initializers. */ |
512 | newdata->next = gfc_current_ns->data; | |
513 | gfc_current_ns->data = newdata; | |
514 | ||
515 | return m; | |
516 | } | |
517 | ||
636dff67 | 518 | |
294fbfc8 | 519 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
13795658 | 520 | we are matching a DATA statement and are therefore issuing an error |
d51347f9 | 521 | if we encounter something unexpected, if not, we're trying to match |
69de3b83 | 522 | an old-style initialization expression of the form INTEGER I /2/. */ |
294fbfc8 TS |
523 | |
524 | match | |
525 | gfc_match_data (void) | |
526 | { | |
7b901ac4 | 527 | gfc_data *new_data; |
294fbfc8 TS |
528 | match m; |
529 | ||
ca39e6f2 | 530 | set_in_match_data (true); |
2220652d | 531 | |
294fbfc8 TS |
532 | for (;;) |
533 | { | |
7b901ac4 KG |
534 | new_data = gfc_get_data (); |
535 | new_data->where = gfc_current_locus; | |
294fbfc8 | 536 | |
7b901ac4 | 537 | m = top_var_list (new_data); |
294fbfc8 TS |
538 | if (m != MATCH_YES) |
539 | goto cleanup; | |
540 | ||
7b901ac4 | 541 | m = top_val_list (new_data); |
294fbfc8 TS |
542 | if (m != MATCH_YES) |
543 | goto cleanup; | |
544 | ||
7b901ac4 KG |
545 | new_data->next = gfc_current_ns->data; |
546 | gfc_current_ns->data = new_data; | |
294fbfc8 TS |
547 | |
548 | if (gfc_match_eos () == MATCH_YES) | |
549 | break; | |
550 | ||
551 | gfc_match_char (','); /* Optional comma */ | |
552 | } | |
553 | ||
ca39e6f2 | 554 | set_in_match_data (false); |
2220652d | 555 | |
294fbfc8 TS |
556 | if (gfc_pure (NULL)) |
557 | { | |
558 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
559 | return MATCH_ERROR; | |
560 | } | |
561 | ||
562 | return MATCH_YES; | |
563 | ||
564 | cleanup: | |
ca39e6f2 | 565 | set_in_match_data (false); |
7b901ac4 | 566 | gfc_free_data (new_data); |
294fbfc8 TS |
567 | return MATCH_ERROR; |
568 | } | |
569 | ||
570 | ||
571 | /************************ Declaration statements *********************/ | |
572 | ||
6de9cd9a DN |
573 | /* Match an intent specification. Since this can only happen after an |
574 | INTENT word, a legal intent-spec must follow. */ | |
575 | ||
576 | static sym_intent | |
577 | match_intent_spec (void) | |
578 | { | |
579 | ||
580 | if (gfc_match (" ( in out )") == MATCH_YES) | |
581 | return INTENT_INOUT; | |
582 | if (gfc_match (" ( in )") == MATCH_YES) | |
583 | return INTENT_IN; | |
584 | if (gfc_match (" ( out )") == MATCH_YES) | |
585 | return INTENT_OUT; | |
586 | ||
587 | gfc_error ("Bad INTENT specification at %C"); | |
588 | return INTENT_UNKNOWN; | |
589 | } | |
590 | ||
591 | ||
592 | /* Matches a character length specification, which is either a | |
593 | specification expression or a '*'. */ | |
594 | ||
595 | static match | |
636dff67 | 596 | char_len_param_value (gfc_expr **expr) |
6de9cd9a | 597 | { |
cba28dad JD |
598 | match m; |
599 | ||
6de9cd9a DN |
600 | if (gfc_match_char ('*') == MATCH_YES) |
601 | { | |
602 | *expr = NULL; | |
603 | return MATCH_YES; | |
604 | } | |
605 | ||
cba28dad | 606 | m = gfc_match_expr (expr); |
f37e928c DK |
607 | |
608 | if (m == MATCH_YES | |
609 | && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE) | |
610 | return MATCH_ERROR; | |
611 | ||
cba28dad JD |
612 | if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION) |
613 | { | |
614 | if ((*expr)->value.function.actual | |
615 | && (*expr)->value.function.actual->expr->symtree) | |
616 | { | |
617 | gfc_expr *e; | |
618 | e = (*expr)->value.function.actual->expr; | |
619 | if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE | |
620 | && e->expr_type == EXPR_VARIABLE) | |
621 | { | |
622 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) | |
623 | goto syntax; | |
624 | if (e->symtree->n.sym->ts.type == BT_CHARACTER | |
bc21d315 JW |
625 | && e->symtree->n.sym->ts.u.cl |
626 | && e->symtree->n.sym->ts.u.cl->length->ts.type == BT_UNKNOWN) | |
cba28dad JD |
627 | goto syntax; |
628 | } | |
629 | } | |
630 | } | |
631 | return m; | |
632 | ||
633 | syntax: | |
634 | gfc_error ("Conflict in attributes of function argument at %C"); | |
635 | return MATCH_ERROR; | |
6de9cd9a DN |
636 | } |
637 | ||
638 | ||
639 | /* A character length is a '*' followed by a literal integer or a | |
640 | char_len_param_value in parenthesis. */ | |
641 | ||
642 | static match | |
636dff67 | 643 | match_char_length (gfc_expr **expr) |
6de9cd9a | 644 | { |
5cf54585 | 645 | int length; |
6de9cd9a DN |
646 | match m; |
647 | ||
648 | m = gfc_match_char ('*'); | |
649 | if (m != MATCH_YES) | |
650 | return m; | |
651 | ||
5cf54585 | 652 | m = gfc_match_small_literal_int (&length, NULL); |
6de9cd9a DN |
653 | if (m == MATCH_ERROR) |
654 | return m; | |
655 | ||
656 | if (m == MATCH_YES) | |
657 | { | |
e2ab8b09 JW |
658 | if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: " |
659 | "Old-style character length at %C") == FAILURE) | |
660 | return MATCH_ERROR; | |
6de9cd9a DN |
661 | *expr = gfc_int_expr (length); |
662 | return m; | |
663 | } | |
664 | ||
665 | if (gfc_match_char ('(') == MATCH_NO) | |
666 | goto syntax; | |
667 | ||
668 | m = char_len_param_value (expr); | |
1c8bcdf7 PT |
669 | if (m != MATCH_YES && gfc_matching_function) |
670 | { | |
671 | gfc_undo_symbols (); | |
672 | m = MATCH_YES; | |
673 | } | |
674 | ||
6de9cd9a DN |
675 | if (m == MATCH_ERROR) |
676 | return m; | |
677 | if (m == MATCH_NO) | |
678 | goto syntax; | |
679 | ||
680 | if (gfc_match_char (')') == MATCH_NO) | |
681 | { | |
682 | gfc_free_expr (*expr); | |
683 | *expr = NULL; | |
684 | goto syntax; | |
685 | } | |
686 | ||
687 | return MATCH_YES; | |
688 | ||
689 | syntax: | |
690 | gfc_error ("Syntax error in character length specification at %C"); | |
691 | return MATCH_ERROR; | |
692 | } | |
693 | ||
694 | ||
9e35b386 EE |
695 | /* Special subroutine for finding a symbol. Check if the name is found |
696 | in the current name space. If not, and we're compiling a function or | |
697 | subroutine and the parent compilation unit is an interface, then check | |
698 | to see if the name we've been given is the name of the interface | |
699 | (located in another namespace). */ | |
6de9cd9a DN |
700 | |
701 | static int | |
08a6b8e0 | 702 | find_special (const char *name, gfc_symbol **result, bool allow_subroutine) |
6de9cd9a DN |
703 | { |
704 | gfc_state_data *s; | |
08a6b8e0 | 705 | gfc_symtree *st; |
9e35b386 | 706 | int i; |
6de9cd9a | 707 | |
08a6b8e0 | 708 | i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine); |
d51347f9 | 709 | if (i == 0) |
08a6b8e0 TB |
710 | { |
711 | *result = st ? st->n.sym : NULL; | |
712 | goto end; | |
713 | } | |
d51347f9 | 714 | |
6de9cd9a DN |
715 | if (gfc_current_state () != COMP_SUBROUTINE |
716 | && gfc_current_state () != COMP_FUNCTION) | |
9e35b386 | 717 | goto end; |
6de9cd9a DN |
718 | |
719 | s = gfc_state_stack->previous; | |
720 | if (s == NULL) | |
9e35b386 | 721 | goto end; |
6de9cd9a DN |
722 | |
723 | if (s->state != COMP_INTERFACE) | |
9e35b386 | 724 | goto end; |
6de9cd9a | 725 | if (s->sym == NULL) |
66e4ab31 | 726 | goto end; /* Nameless interface. */ |
6de9cd9a DN |
727 | |
728 | if (strcmp (name, s->sym->name) == 0) | |
729 | { | |
730 | *result = s->sym; | |
731 | return 0; | |
732 | } | |
733 | ||
9e35b386 EE |
734 | end: |
735 | return i; | |
6de9cd9a DN |
736 | } |
737 | ||
738 | ||
739 | /* Special subroutine for getting a symbol node associated with a | |
740 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
741 | symbol is created in the parent using with symtree node in the | |
742 | child unit pointing to the symbol. If the current namespace has no | |
743 | parent, then the symbol is just created in the current unit. */ | |
744 | ||
745 | static int | |
636dff67 | 746 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
6de9cd9a DN |
747 | { |
748 | gfc_symtree *st; | |
749 | gfc_symbol *sym; | |
a7ca4d8d | 750 | int rc = 0; |
6de9cd9a | 751 | |
1a492601 PT |
752 | /* Module functions have to be left in their own namespace because |
753 | they have potentially (almost certainly!) already been referenced. | |
754 | In this sense, they are rather like external functions. This is | |
755 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
756 | space is set to point to the master function, so that the fake | |
757 | result mechanism can work. */ | |
758 | if (module_fcn_entry) | |
6c12686b PT |
759 | { |
760 | /* Present if entry is declared to be a module procedure. */ | |
761 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); | |
aa84a9a5 | 762 | |
6c12686b PT |
763 | if (*result == NULL) |
764 | rc = gfc_get_symbol (name, NULL, result); | |
2e32a71e | 765 | else if (!gfc_get_symbol (name, NULL, &sym) && sym |
aa84a9a5 PT |
766 | && (*result)->ts.type == BT_UNKNOWN |
767 | && sym->attr.flavor == FL_UNKNOWN) | |
768 | /* Pick up the typespec for the entry, if declared in the function | |
769 | body. Note that this symbol is FL_UNKNOWN because it will | |
770 | only have appeared in a type declaration. The local symtree | |
771 | is set to point to the module symbol and a unique symtree | |
772 | to the local version. This latter ensures a correct clearing | |
773 | of the symbols. */ | |
2e32a71e PT |
774 | { |
775 | /* If the ENTRY proceeds its specification, we need to ensure | |
776 | that this does not raise a "has no IMPLICIT type" error. */ | |
777 | if (sym->ts.type == BT_UNKNOWN) | |
0e5a218b | 778 | sym->attr.untyped = 1; |
2e32a71e | 779 | |
0e5a218b | 780 | (*result)->ts = sym->ts; |
2e32a71e PT |
781 | |
782 | /* Put the symbol in the procedure namespace so that, should | |
df2fba9e | 783 | the ENTRY precede its specification, the specification |
2e32a71e PT |
784 | can be applied. */ |
785 | (*result)->ns = gfc_current_ns; | |
786 | ||
787 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); | |
788 | st->n.sym = *result; | |
789 | st = gfc_get_unique_symtree (gfc_current_ns); | |
790 | st->n.sym = sym; | |
791 | } | |
6c12686b | 792 | } |
68ea355b PT |
793 | else |
794 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
6de9cd9a | 795 | |
a7ca4d8d PT |
796 | if (rc) |
797 | return rc; | |
798 | ||
68ea355b | 799 | sym = *result; |
2c693a24 | 800 | gfc_current_ns->refs++; |
6de9cd9a | 801 | |
7b901ac4 | 802 | if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE) |
68ea355b | 803 | { |
cda7004b PT |
804 | /* Trap another encompassed procedure with the same name. All |
805 | these conditions are necessary to avoid picking up an entry | |
806 | whose name clashes with that of the encompassing procedure; | |
807 | this is handled using gsymbols to register unique,globally | |
808 | accessible names. */ | |
68ea355b | 809 | if (sym->attr.flavor != 0 |
636dff67 SK |
810 | && sym->attr.proc != 0 |
811 | && (sym->attr.subroutine || sym->attr.function) | |
812 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
68ea355b PT |
813 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
814 | name, &sym->declared_at); | |
815 | ||
fd3e70af JD |
816 | /* Trap a procedure with a name the same as interface in the |
817 | encompassing scope. */ | |
818 | if (sym->attr.generic != 0 | |
2305fa31 JD |
819 | && (sym->attr.subroutine || sym->attr.function) |
820 | && !sym->attr.mod_proc) | |
fd3e70af JD |
821 | gfc_error_now ("Name '%s' at %C is already defined" |
822 | " as a generic interface at %L", | |
823 | name, &sym->declared_at); | |
824 | ||
68ea355b PT |
825 | /* Trap declarations of attributes in encompassing scope. The |
826 | signature for this is that ts.kind is set. Legitimate | |
827 | references only set ts.type. */ | |
828 | if (sym->ts.kind != 0 | |
636dff67 SK |
829 | && !sym->attr.implicit_type |
830 | && sym->attr.proc == 0 | |
831 | && gfc_current_ns->parent != NULL | |
832 | && sym->attr.access == 0 | |
833 | && !module_fcn_entry) | |
834 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
835 | "and must not have attributes declared at %L", | |
68ea355b PT |
836 | name, &sym->declared_at); |
837 | } | |
838 | ||
839 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
840 | return rc; | |
6de9cd9a | 841 | |
1a492601 PT |
842 | /* Module function entries will already have a symtree in |
843 | the current namespace but will need one at module level. */ | |
844 | if (module_fcn_entry) | |
6c12686b PT |
845 | { |
846 | /* Present if entry is declared to be a module procedure. */ | |
847 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); | |
848 | if (st == NULL) | |
849 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
850 | } | |
1a492601 PT |
851 | else |
852 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
6de9cd9a | 853 | |
6de9cd9a DN |
854 | st->n.sym = sym; |
855 | sym->refs++; | |
856 | ||
66e4ab31 | 857 | /* See if the procedure should be a module procedure. */ |
6de9cd9a | 858 | |
1a492601 | 859 | if (((sym->ns->proc_name != NULL |
6c12686b PT |
860 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
861 | && sym->attr.proc != PROC_MODULE) | |
862 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) | |
863 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
864 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
865 | rc = 2; |
866 | ||
867 | return rc; | |
868 | } | |
869 | ||
870 | ||
a8b3b0b6 CR |
871 | /* Verify that the given symbol representing a parameter is C |
872 | interoperable, by checking to see if it was marked as such after | |
873 | its declaration. If the given symbol is not interoperable, a | |
874 | warning is reported, thus removing the need to return the status to | |
875 | the calling function. The standard does not require the user use | |
876 | one of the iso_c_binding named constants to declare an | |
877 | interoperable parameter, but we can't be sure if the param is C | |
878 | interop or not if the user doesn't. For example, integer(4) may be | |
879 | legal Fortran, but doesn't have meaning in C. It may interop with | |
880 | a number of the C types, which causes a problem because the | |
881 | compiler can't know which one. This code is almost certainly not | |
882 | portable, and the user will get what they deserve if the C type | |
883 | across platforms isn't always interoperable with integer(4). If | |
884 | the user had used something like integer(c_int) or integer(c_long), | |
885 | the compiler could have automatically handled the varying sizes | |
886 | across platforms. */ | |
887 | ||
17b1d2a0 | 888 | gfc_try |
a8b3b0b6 CR |
889 | verify_c_interop_param (gfc_symbol *sym) |
890 | { | |
891 | int is_c_interop = 0; | |
17b1d2a0 | 892 | gfc_try retval = SUCCESS; |
a8b3b0b6 CR |
893 | |
894 | /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). | |
895 | Don't repeat the checks here. */ | |
896 | if (sym->attr.implicit_type) | |
897 | return SUCCESS; | |
898 | ||
899 | /* For subroutines or functions that are passed to a BIND(C) procedure, | |
900 | they're interoperable if they're BIND(C) and their params are all | |
901 | interoperable. */ | |
902 | if (sym->attr.flavor == FL_PROCEDURE) | |
903 | { | |
904 | if (sym->attr.is_bind_c == 0) | |
905 | { | |
906 | gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " | |
907 | "attribute to be C interoperable", sym->name, | |
908 | &(sym->declared_at)); | |
909 | ||
910 | return FAILURE; | |
911 | } | |
912 | else | |
913 | { | |
914 | if (sym->attr.is_c_interop == 1) | |
915 | /* We've already checked this procedure; don't check it again. */ | |
916 | return SUCCESS; | |
917 | else | |
918 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, | |
919 | sym->common_block); | |
920 | } | |
921 | } | |
922 | ||
923 | /* See if we've stored a reference to a procedure that owns sym. */ | |
924 | if (sym->ns != NULL && sym->ns->proc_name != NULL) | |
925 | { | |
926 | if (sym->ns->proc_name->attr.is_bind_c == 1) | |
927 | { | |
928 | is_c_interop = | |
2ec855f1 | 929 | (verify_c_interop (&(sym->ts)) |
a8b3b0b6 CR |
930 | == SUCCESS ? 1 : 0); |
931 | ||
932 | if (is_c_interop != 1) | |
933 | { | |
934 | /* Make personalized messages to give better feedback. */ | |
935 | if (sym->ts.type == BT_DERIVED) | |
936 | gfc_error ("Type '%s' at %L is a parameter to the BIND(C) " | |
937 | " procedure '%s' but is not C interoperable " | |
938 | "because derived type '%s' is not C interoperable", | |
939 | sym->name, &(sym->declared_at), | |
940 | sym->ns->proc_name->name, | |
bc21d315 | 941 | sym->ts.u.derived->name); |
a8b3b0b6 CR |
942 | else |
943 | gfc_warning ("Variable '%s' at %L is a parameter to the " | |
944 | "BIND(C) procedure '%s' but may not be C " | |
945 | "interoperable", | |
946 | sym->name, &(sym->declared_at), | |
947 | sym->ns->proc_name->name); | |
948 | } | |
aa5e22f0 CR |
949 | |
950 | /* Character strings are only C interoperable if they have a | |
951 | length of 1. */ | |
952 | if (sym->ts.type == BT_CHARACTER) | |
953 | { | |
bc21d315 | 954 | gfc_charlen *cl = sym->ts.u.cl; |
aa5e22f0 CR |
955 | if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT |
956 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) | |
957 | { | |
958 | gfc_error ("Character argument '%s' at %L " | |
959 | "must be length 1 because " | |
960 | "procedure '%s' is BIND(C)", | |
961 | sym->name, &sym->declared_at, | |
962 | sym->ns->proc_name->name); | |
963 | retval = FAILURE; | |
964 | } | |
965 | } | |
966 | ||
a8b3b0b6 CR |
967 | /* We have to make sure that any param to a bind(c) routine does |
968 | not have the allocatable, pointer, or optional attributes, | |
969 | according to J3/04-007, section 5.1. */ | |
970 | if (sym->attr.allocatable == 1) | |
971 | { | |
972 | gfc_error ("Variable '%s' at %L cannot have the " | |
973 | "ALLOCATABLE attribute because procedure '%s'" | |
974 | " is BIND(C)", sym->name, &(sym->declared_at), | |
975 | sym->ns->proc_name->name); | |
976 | retval = FAILURE; | |
977 | } | |
978 | ||
979 | if (sym->attr.pointer == 1) | |
980 | { | |
981 | gfc_error ("Variable '%s' at %L cannot have the " | |
982 | "POINTER attribute because procedure '%s'" | |
983 | " is BIND(C)", sym->name, &(sym->declared_at), | |
984 | sym->ns->proc_name->name); | |
985 | retval = FAILURE; | |
986 | } | |
987 | ||
988 | if (sym->attr.optional == 1) | |
989 | { | |
990 | gfc_error ("Variable '%s' at %L cannot have the " | |
991 | "OPTIONAL attribute because procedure '%s'" | |
992 | " is BIND(C)", sym->name, &(sym->declared_at), | |
993 | sym->ns->proc_name->name); | |
994 | retval = FAILURE; | |
995 | } | |
996 | ||
997 | /* Make sure that if it has the dimension attribute, that it is | |
998 | either assumed size or explicit shape. */ | |
999 | if (sym->as != NULL) | |
1000 | { | |
1001 | if (sym->as->type == AS_ASSUMED_SHAPE) | |
1002 | { | |
1003 | gfc_error ("Assumed-shape array '%s' at %L cannot be an " | |
1004 | "argument to the procedure '%s' at %L because " | |
1005 | "the procedure is BIND(C)", sym->name, | |
1006 | &(sym->declared_at), sym->ns->proc_name->name, | |
1007 | &(sym->ns->proc_name->declared_at)); | |
1008 | retval = FAILURE; | |
1009 | } | |
1010 | ||
1011 | if (sym->as->type == AS_DEFERRED) | |
1012 | { | |
1013 | gfc_error ("Deferred-shape array '%s' at %L cannot be an " | |
1014 | "argument to the procedure '%s' at %L because " | |
1015 | "the procedure is BIND(C)", sym->name, | |
1016 | &(sym->declared_at), sym->ns->proc_name->name, | |
1017 | &(sym->ns->proc_name->declared_at)); | |
1018 | retval = FAILURE; | |
1019 | } | |
1020 | } | |
1021 | } | |
1022 | } | |
1023 | ||
1024 | return retval; | |
1025 | } | |
1026 | ||
1027 | ||
cf2b3c22 | 1028 | |
a8b3b0b6 | 1029 | /* Function called by variable_decl() that adds a name to the symbol table. */ |
6de9cd9a | 1030 | |
17b1d2a0 | 1031 | static gfc_try |
636dff67 SK |
1032 | build_sym (const char *name, gfc_charlen *cl, |
1033 | gfc_array_spec **as, locus *var_locus) | |
6de9cd9a DN |
1034 | { |
1035 | symbol_attribute attr; | |
1036 | gfc_symbol *sym; | |
1037 | ||
9e35b386 | 1038 | if (gfc_get_symbol (name, NULL, &sym)) |
6de9cd9a DN |
1039 | return FAILURE; |
1040 | ||
66e4ab31 | 1041 | /* Start updating the symbol table. Add basic type attribute if present. */ |
6de9cd9a | 1042 | if (current_ts.type != BT_UNKNOWN |
636dff67 SK |
1043 | && (sym->attr.implicit_type == 0 |
1044 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
6de9cd9a DN |
1045 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
1046 | return FAILURE; | |
1047 | ||
1048 | if (sym->ts.type == BT_CHARACTER) | |
bc21d315 | 1049 | sym->ts.u.cl = cl; |
6de9cd9a DN |
1050 | |
1051 | /* Add dimension attribute if present. */ | |
1052 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
1053 | return FAILURE; | |
1054 | *as = NULL; | |
1055 | ||
1056 | /* Add attribute to symbol. The copy is so that we can reset the | |
1057 | dimension attribute. */ | |
1058 | attr = current_attr; | |
1059 | attr.dimension = 0; | |
1060 | ||
1061 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
1062 | return FAILURE; | |
1063 | ||
a8b3b0b6 CR |
1064 | /* Finish any work that may need to be done for the binding label, |
1065 | if it's a bind(c). The bind(c) attr is found before the symbol | |
1066 | is made, and before the symbol name (for data decls), so the | |
1067 | current_ts is holding the binding label, or nothing if the | |
1068 | name= attr wasn't given. Therefore, test here if we're dealing | |
1069 | with a bind(c) and make sure the binding label is set correctly. */ | |
1070 | if (sym->attr.is_bind_c == 1) | |
1071 | { | |
1072 | if (sym->binding_label[0] == '\0') | |
1073 | { | |
ad4a2f64 TB |
1074 | /* Set the binding label and verify that if a NAME= was specified |
1075 | then only one identifier was in the entity-decl-list. */ | |
1076 | if (set_binding_label (sym->binding_label, sym->name, | |
1077 | num_idents_on_line) == FAILURE) | |
a8b3b0b6 CR |
1078 | return FAILURE; |
1079 | } | |
1080 | } | |
1081 | ||
1082 | /* See if we know we're in a common block, and if it's a bind(c) | |
1083 | common then we need to make sure we're an interoperable type. */ | |
1084 | if (sym->attr.in_common == 1) | |
1085 | { | |
1086 | /* Test the common block object. */ | |
1087 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 | |
1088 | && sym->ts.is_c_interop != 1) | |
1089 | { | |
1090 | gfc_error_now ("Variable '%s' in common block '%s' at %C " | |
1091 | "must be declared with a C interoperable " | |
1092 | "kind since common block '%s' is BIND(C)", | |
1093 | sym->name, sym->common_block->name, | |
1094 | sym->common_block->name); | |
1095 | gfc_clear_error (); | |
1096 | } | |
1097 | } | |
1098 | ||
9a3db5a3 PT |
1099 | sym->attr.implied_index = 0; |
1100 | ||
cf2b3c22 | 1101 | if (sym->ts.type == BT_CLASS) |
2e23972e JW |
1102 | { |
1103 | sym->attr.class_ok = (sym->attr.dummy | |
1104 | || sym->attr.pointer | |
1105 | || sym->attr.allocatable) ? 1 : 0; | |
7c1dab0d | 1106 | gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as); |
2e23972e | 1107 | } |
cf2b3c22 | 1108 | |
6de9cd9a DN |
1109 | return SUCCESS; |
1110 | } | |
1111 | ||
636dff67 | 1112 | |
df7cc9b5 | 1113 | /* Set character constant to the given length. The constant will be padded or |
d2848082 DK |
1114 | truncated. If we're inside an array constructor without a typespec, we |
1115 | additionally check that all elements have the same length; check_len -1 | |
1116 | means no checking. */ | |
df7cc9b5 FW |
1117 | |
1118 | void | |
d2848082 | 1119 | gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len) |
df7cc9b5 | 1120 | { |
00660189 | 1121 | gfc_char_t *s; |
df7cc9b5 FW |
1122 | int slen; |
1123 | ||
1124 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
d393bbd7 | 1125 | gcc_assert (expr->ts.type == BT_CHARACTER); |
df7cc9b5 FW |
1126 | |
1127 | slen = expr->value.character.length; | |
1128 | if (len != slen) | |
1129 | { | |
00660189 FXC |
1130 | s = gfc_get_wide_string (len + 1); |
1131 | memcpy (s, expr->value.character.string, | |
1132 | MIN (len, slen) * sizeof (gfc_char_t)); | |
df7cc9b5 | 1133 | if (len > slen) |
00660189 | 1134 | gfc_wide_memset (&s[slen], ' ', len - slen); |
2220652d PT |
1135 | |
1136 | if (gfc_option.warn_character_truncation && slen > len) | |
1137 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
1138 | "(%d/%d)", &expr->where, slen, len); | |
1139 | ||
1140 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
1141 | initializers. */ | |
d2848082 DK |
1142 | if (check_len != -1 && slen != check_len |
1143 | && !(gfc_option.allow_std & GFC_STD_GNU)) | |
2220652d PT |
1144 | gfc_error_now ("The CHARACTER elements of the array constructor " |
1145 | "at %L must have the same length (%d/%d)", | |
d2848082 | 1146 | &expr->where, slen, check_len); |
2220652d | 1147 | |
150675a8 | 1148 | s[len] = '\0'; |
df7cc9b5 FW |
1149 | gfc_free (expr->value.character.string); |
1150 | expr->value.character.string = s; | |
1151 | expr->value.character.length = len; | |
1152 | } | |
1153 | } | |
6de9cd9a | 1154 | |
25d8f0a2 | 1155 | |
d51347f9 | 1156 | /* Function to create and update the enumerator history |
25d8f0a2 | 1157 | using the information passed as arguments. |
d51347f9 TB |
1158 | Pointer "max_enum" is also updated, to point to |
1159 | enum history node containing largest initializer. | |
25d8f0a2 TS |
1160 | |
1161 | SYM points to the symbol node of enumerator. | |
66e4ab31 | 1162 | INIT points to its enumerator value. */ |
25d8f0a2 | 1163 | |
d51347f9 | 1164 | static void |
636dff67 | 1165 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
25d8f0a2 TS |
1166 | { |
1167 | enumerator_history *new_enum_history; | |
1168 | gcc_assert (sym != NULL && init != NULL); | |
1169 | ||
ece3f663 | 1170 | new_enum_history = XCNEW (enumerator_history); |
25d8f0a2 TS |
1171 | |
1172 | new_enum_history->sym = sym; | |
1173 | new_enum_history->initializer = init; | |
1174 | new_enum_history->next = NULL; | |
1175 | ||
1176 | if (enum_history == NULL) | |
1177 | { | |
1178 | enum_history = new_enum_history; | |
1179 | max_enum = enum_history; | |
1180 | } | |
1181 | else | |
1182 | { | |
1183 | new_enum_history->next = enum_history; | |
1184 | enum_history = new_enum_history; | |
1185 | ||
d51347f9 | 1186 | if (mpz_cmp (max_enum->initializer->value.integer, |
25d8f0a2 | 1187 | new_enum_history->initializer->value.integer) < 0) |
636dff67 | 1188 | max_enum = new_enum_history; |
25d8f0a2 TS |
1189 | } |
1190 | } | |
1191 | ||
1192 | ||
d51347f9 | 1193 | /* Function to free enum kind history. */ |
25d8f0a2 | 1194 | |
d51347f9 | 1195 | void |
636dff67 | 1196 | gfc_free_enum_history (void) |
25d8f0a2 | 1197 | { |
d51347f9 TB |
1198 | enumerator_history *current = enum_history; |
1199 | enumerator_history *next; | |
25d8f0a2 TS |
1200 | |
1201 | while (current != NULL) | |
1202 | { | |
1203 | next = current->next; | |
1204 | gfc_free (current); | |
1205 | current = next; | |
1206 | } | |
1207 | max_enum = NULL; | |
1208 | enum_history = NULL; | |
1209 | } | |
1210 | ||
1211 | ||
6de9cd9a DN |
1212 | /* Function called by variable_decl() that adds an initialization |
1213 | expression to a symbol. */ | |
1214 | ||
17b1d2a0 | 1215 | static gfc_try |
66e4ab31 | 1216 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) |
6de9cd9a DN |
1217 | { |
1218 | symbol_attribute attr; | |
1219 | gfc_symbol *sym; | |
1220 | gfc_expr *init; | |
1221 | ||
1222 | init = *initp; | |
08a6b8e0 | 1223 | if (find_special (name, &sym, false)) |
6de9cd9a DN |
1224 | return FAILURE; |
1225 | ||
1226 | attr = sym->attr; | |
1227 | ||
1228 | /* If this symbol is confirming an implicit parameter type, | |
1229 | then an initialization expression is not allowed. */ | |
1230 | if (attr.flavor == FL_PARAMETER | |
1231 | && sym->value != NULL | |
1232 | && *initp != NULL) | |
1233 | { | |
1234 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
1235 | sym->name); | |
1236 | return FAILURE; | |
1237 | } | |
1238 | ||
1239 | if (init == NULL) | |
1240 | { | |
1241 | /* An initializer is required for PARAMETER declarations. */ | |
1242 | if (attr.flavor == FL_PARAMETER) | |
1243 | { | |
1244 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
1245 | return FAILURE; | |
1246 | } | |
1247 | } | |
1248 | else | |
1249 | { | |
1250 | /* If a variable appears in a DATA block, it cannot have an | |
1de8a836 | 1251 | initializer. */ |
6de9cd9a DN |
1252 | if (sym->attr.data) |
1253 | { | |
636dff67 SK |
1254 | gfc_error ("Variable '%s' at %C with an initializer already " |
1255 | "appears in a DATA statement", sym->name); | |
6de9cd9a DN |
1256 | return FAILURE; |
1257 | } | |
1258 | ||
75d17889 TS |
1259 | /* Check if the assignment can happen. This has to be put off |
1260 | until later for a derived type variable. */ | |
6de9cd9a | 1261 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
cf2b3c22 | 1262 | && sym->ts.type != BT_CLASS && init->ts.type != BT_CLASS |
6de9cd9a DN |
1263 | && gfc_check_assign_symbol (sym, init) == FAILURE) |
1264 | return FAILURE; | |
1265 | ||
bc21d315 | 1266 | if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl |
51b128a0 | 1267 | && init->ts.type == BT_CHARACTER) |
df7cc9b5 FW |
1268 | { |
1269 | /* Update symbol character length according initializer. */ | |
51b128a0 PT |
1270 | if (gfc_check_assign_symbol (sym, init) == FAILURE) |
1271 | return FAILURE; | |
1272 | ||
bc21d315 | 1273 | if (sym->ts.u.cl->length == NULL) |
df7cc9b5 | 1274 | { |
a99288e5 | 1275 | int clen; |
66e4ab31 SK |
1276 | /* If there are multiple CHARACTER variables declared on the |
1277 | same line, we don't want them to share the same length. */ | |
b76e28c6 | 1278 | sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
96f4873b | 1279 | |
a99288e5 PT |
1280 | if (sym->attr.flavor == FL_PARAMETER) |
1281 | { | |
1282 | if (init->expr_type == EXPR_CONSTANT) | |
1283 | { | |
1284 | clen = init->value.character.length; | |
bc21d315 | 1285 | sym->ts.u.cl->length = gfc_int_expr (clen); |
a99288e5 PT |
1286 | } |
1287 | else if (init->expr_type == EXPR_ARRAY) | |
1288 | { | |
1289 | gfc_expr *p = init->value.constructor->expr; | |
1290 | clen = p->value.character.length; | |
bc21d315 | 1291 | sym->ts.u.cl->length = gfc_int_expr (clen); |
a99288e5 | 1292 | } |
bc21d315 JW |
1293 | else if (init->ts.u.cl && init->ts.u.cl->length) |
1294 | sym->ts.u.cl->length = | |
1295 | gfc_copy_expr (sym->value->ts.u.cl->length); | |
a99288e5 | 1296 | } |
df7cc9b5 FW |
1297 | } |
1298 | /* Update initializer character length according symbol. */ | |
bc21d315 | 1299 | else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT) |
df7cc9b5 | 1300 | { |
bc21d315 | 1301 | int len = mpz_get_si (sym->ts.u.cl->length->value.integer); |
df7cc9b5 FW |
1302 | gfc_constructor * p; |
1303 | ||
1304 | if (init->expr_type == EXPR_CONSTANT) | |
d2848082 | 1305 | gfc_set_constant_character_len (len, init, -1); |
df7cc9b5 FW |
1306 | else if (init->expr_type == EXPR_ARRAY) |
1307 | { | |
dcdc7b6c PT |
1308 | /* Build a new charlen to prevent simplification from |
1309 | deleting the length before it is resolved. */ | |
b76e28c6 | 1310 | init->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
bc21d315 | 1311 | init->ts.u.cl->length = gfc_copy_expr (sym->ts.u.cl->length); |
dcdc7b6c | 1312 | |
df7cc9b5 | 1313 | for (p = init->value.constructor; p; p = p->next) |
d2848082 | 1314 | gfc_set_constant_character_len (len, p->expr, -1); |
df7cc9b5 FW |
1315 | } |
1316 | } | |
1317 | } | |
1318 | ||
a8b3b0b6 CR |
1319 | /* Need to check if the expression we initialized this |
1320 | to was one of the iso_c_binding named constants. If so, | |
1321 | and we're a parameter (constant), let it be iso_c. | |
1322 | For example: | |
1323 | integer(c_int), parameter :: my_int = c_int | |
1324 | integer(my_int) :: my_int_2 | |
1325 | If we mark my_int as iso_c (since we can see it's value | |
1326 | is equal to one of the named constants), then my_int_2 | |
1327 | will be considered C interoperable. */ | |
1328 | if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) | |
1329 | { | |
1330 | sym->ts.is_iso_c |= init->ts.is_iso_c; | |
1331 | sym->ts.is_c_interop |= init->ts.is_c_interop; | |
1332 | /* attr bits needed for module files. */ | |
1333 | sym->attr.is_iso_c |= init->ts.is_iso_c; | |
1334 | sym->attr.is_c_interop |= init->ts.is_c_interop; | |
1335 | if (init->ts.is_iso_c) | |
1336 | sym->ts.f90_type = init->ts.f90_type; | |
1337 | } | |
1338 | ||
6de9cd9a DN |
1339 | /* Add initializer. Make sure we keep the ranks sane. */ |
1340 | if (sym->attr.dimension && init->rank == 0) | |
a9b43781 PT |
1341 | { |
1342 | mpz_t size; | |
1343 | gfc_expr *array; | |
1344 | gfc_constructor *c; | |
1345 | int n; | |
1346 | if (sym->attr.flavor == FL_PARAMETER | |
1347 | && init->expr_type == EXPR_CONSTANT | |
1348 | && spec_size (sym->as, &size) == SUCCESS | |
1349 | && mpz_cmp_si (size, 0) > 0) | |
1350 | { | |
1351 | array = gfc_start_constructor (init->ts.type, init->ts.kind, | |
1352 | &init->where); | |
1353 | ||
1354 | array->value.constructor = c = NULL; | |
1355 | for (n = 0; n < (int)mpz_get_si (size); n++) | |
1356 | { | |
1357 | if (array->value.constructor == NULL) | |
1358 | { | |
1359 | array->value.constructor = c = gfc_get_constructor (); | |
1360 | c->expr = init; | |
1361 | } | |
1362 | else | |
1363 | { | |
1364 | c->next = gfc_get_constructor (); | |
1365 | c = c->next; | |
1366 | c->expr = gfc_copy_expr (init); | |
1367 | } | |
1368 | } | |
1369 | ||
1370 | array->shape = gfc_get_shape (sym->as->rank); | |
1371 | for (n = 0; n < sym->as->rank; n++) | |
1372 | spec_dimen_size (sym->as, n, &array->shape[n]); | |
1373 | ||
1374 | init = array; | |
1375 | mpz_clear (size); | |
1376 | } | |
1377 | init->rank = sym->as->rank; | |
1378 | } | |
6de9cd9a DN |
1379 | |
1380 | sym->value = init; | |
ef7236d2 DF |
1381 | if (sym->attr.save == SAVE_NONE) |
1382 | sym->attr.save = SAVE_IMPLICIT; | |
6de9cd9a DN |
1383 | *initp = NULL; |
1384 | } | |
1385 | ||
1386 | return SUCCESS; | |
1387 | } | |
1388 | ||
1389 | ||
1390 | /* Function called by variable_decl() that adds a name to a structure | |
1391 | being built. */ | |
1392 | ||
17b1d2a0 | 1393 | static gfc_try |
636dff67 SK |
1394 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
1395 | gfc_array_spec **as) | |
6de9cd9a DN |
1396 | { |
1397 | gfc_component *c; | |
2e23972e | 1398 | gfc_try t = SUCCESS; |
6de9cd9a | 1399 | |
619dd721 | 1400 | /* F03:C438/C439. If the current symbol is of the same derived type that we're |
6de9cd9a | 1401 | constructing, it must have the pointer attribute. */ |
619dd721 | 1402 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
bc21d315 | 1403 | && current_ts.u.derived == gfc_current_block () |
6de9cd9a DN |
1404 | && current_attr.pointer == 0) |
1405 | { | |
1406 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1407 | return FAILURE; | |
1408 | } | |
1409 | ||
636dff67 | 1410 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
6de9cd9a DN |
1411 | { |
1412 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1413 | { | |
1414 | gfc_error ("Array component of structure at %C must have explicit " | |
1415 | "or deferred shape"); | |
1416 | return FAILURE; | |
1417 | } | |
1418 | } | |
1419 | ||
1420 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1421 | return FAILURE; | |
1422 | ||
1423 | c->ts = current_ts; | |
bc21d315 JW |
1424 | if (c->ts.type == BT_CHARACTER) |
1425 | c->ts.u.cl = cl; | |
d4b7d0f0 | 1426 | c->attr = current_attr; |
6de9cd9a DN |
1427 | |
1428 | c->initializer = *init; | |
1429 | *init = NULL; | |
1430 | ||
1431 | c->as = *as; | |
1432 | if (c->as != NULL) | |
d4b7d0f0 | 1433 | c->attr.dimension = 1; |
6de9cd9a DN |
1434 | *as = NULL; |
1435 | ||
28d08315 PT |
1436 | /* Should this ever get more complicated, combine with similar section |
1437 | in add_init_expr_to_sym into a separate function. */ | |
bc21d315 JW |
1438 | if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.u.cl |
1439 | && c->ts.u.cl->length && c->ts.u.cl->length->expr_type == EXPR_CONSTANT) | |
28d08315 | 1440 | { |
d2848082 DK |
1441 | int len; |
1442 | ||
bc21d315 JW |
1443 | gcc_assert (c->ts.u.cl && c->ts.u.cl->length); |
1444 | gcc_assert (c->ts.u.cl->length->expr_type == EXPR_CONSTANT); | |
1445 | gcc_assert (c->ts.u.cl->length->ts.type == BT_INTEGER); | |
d2848082 | 1446 | |
bc21d315 | 1447 | len = mpz_get_si (c->ts.u.cl->length->value.integer); |
28d08315 PT |
1448 | |
1449 | if (c->initializer->expr_type == EXPR_CONSTANT) | |
d2848082 | 1450 | gfc_set_constant_character_len (len, c->initializer, -1); |
bc21d315 JW |
1451 | else if (mpz_cmp (c->ts.u.cl->length->value.integer, |
1452 | c->initializer->ts.u.cl->length->value.integer)) | |
28d08315 | 1453 | { |
d2848082 | 1454 | bool has_ts; |
28d08315 | 1455 | gfc_constructor *ctor = c->initializer->value.constructor; |
d2848082 | 1456 | |
bc21d315 JW |
1457 | has_ts = (c->initializer->ts.u.cl |
1458 | && c->initializer->ts.u.cl->length_from_typespec); | |
d2848082 | 1459 | |
2f4d1994 | 1460 | if (ctor) |
d2848082 | 1461 | { |
2f4d1994 ILT |
1462 | int first_len; |
1463 | ||
1464 | /* Remember the length of the first element for checking | |
1465 | that all elements *in the constructor* have the same | |
1466 | length. This need not be the length of the LHS! */ | |
1467 | gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT); | |
1468 | gcc_assert (ctor->expr->ts.type == BT_CHARACTER); | |
1469 | first_len = ctor->expr->value.character.length; | |
1470 | ||
1471 | for (; ctor; ctor = ctor->next) | |
d2848082 | 1472 | { |
2f4d1994 ILT |
1473 | if (ctor->expr->expr_type == EXPR_CONSTANT) |
1474 | gfc_set_constant_character_len (len, ctor->expr, | |
1475 | has_ts ? -1 : first_len); | |
d2848082 | 1476 | } |
d2848082 | 1477 | } |
28d08315 PT |
1478 | } |
1479 | } | |
1480 | ||
6de9cd9a | 1481 | /* Check array components. */ |
d4b7d0f0 | 1482 | if (!c->attr.dimension) |
2e23972e | 1483 | goto scalar; |
6de9cd9a | 1484 | |
d4b7d0f0 | 1485 | if (c->attr.pointer) |
6de9cd9a DN |
1486 | { |
1487 | if (c->as->type != AS_DEFERRED) | |
1488 | { | |
5046aff5 PT |
1489 | gfc_error ("Pointer array component of structure at %C must have a " |
1490 | "deferred shape"); | |
2e23972e | 1491 | t = FAILURE; |
5046aff5 PT |
1492 | } |
1493 | } | |
d4b7d0f0 | 1494 | else if (c->attr.allocatable) |
5046aff5 PT |
1495 | { |
1496 | if (c->as->type != AS_DEFERRED) | |
1497 | { | |
1498 | gfc_error ("Allocatable component of structure at %C must have a " | |
1499 | "deferred shape"); | |
2e23972e | 1500 | t = FAILURE; |
6de9cd9a DN |
1501 | } |
1502 | } | |
1503 | else | |
1504 | { | |
1505 | if (c->as->type != AS_EXPLICIT) | |
1506 | { | |
636dff67 SK |
1507 | gfc_error ("Array component of structure at %C must have an " |
1508 | "explicit shape"); | |
2e23972e | 1509 | t = FAILURE; |
6de9cd9a DN |
1510 | } |
1511 | } | |
1512 | ||
2e23972e JW |
1513 | scalar: |
1514 | if (c->ts.type == BT_CLASS) | |
7c1dab0d | 1515 | gfc_build_class_symbol (&c->ts, &c->attr, &c->as); |
2e23972e JW |
1516 | |
1517 | return t; | |
6de9cd9a DN |
1518 | } |
1519 | ||
1520 | ||
1521 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1522 | ||
1523 | match | |
636dff67 | 1524 | gfc_match_null (gfc_expr **result) |
6de9cd9a DN |
1525 | { |
1526 | gfc_symbol *sym; | |
1527 | gfc_expr *e; | |
1528 | match m; | |
1529 | ||
1530 | m = gfc_match (" null ( )"); | |
1531 | if (m != MATCH_YES) | |
1532 | return m; | |
1533 | ||
1534 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1535 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1536 | { | |
1537 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1538 | return MATCH_ERROR; | |
1539 | } | |
1540 | ||
1541 | gfc_intrinsic_symbol (sym); | |
1542 | ||
1543 | if (sym->attr.proc != PROC_INTRINSIC | |
231b2fcc TS |
1544 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1545 | sym->name, NULL) == FAILURE | |
1546 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
6de9cd9a DN |
1547 | return MATCH_ERROR; |
1548 | ||
1549 | e = gfc_get_expr (); | |
63645982 | 1550 | e->where = gfc_current_locus; |
6de9cd9a DN |
1551 | e->expr_type = EXPR_NULL; |
1552 | e->ts.type = BT_UNKNOWN; | |
1553 | ||
1554 | *result = e; | |
1555 | ||
1556 | return MATCH_YES; | |
1557 | } | |
1558 | ||
1559 | ||
6de9cd9a DN |
1560 | /* Match a variable name with an optional initializer. When this |
1561 | subroutine is called, a variable is expected to be parsed next. | |
1562 | Depending on what is happening at the moment, updates either the | |
1563 | symbol table or the current interface. */ | |
1564 | ||
1565 | static match | |
949d5b72 | 1566 | variable_decl (int elem) |
6de9cd9a DN |
1567 | { |
1568 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1569 | gfc_expr *initializer, *char_len; | |
1570 | gfc_array_spec *as; | |
83d890b9 | 1571 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
6de9cd9a DN |
1572 | gfc_charlen *cl; |
1573 | locus var_locus; | |
1574 | match m; | |
17b1d2a0 | 1575 | gfc_try t; |
83d890b9 | 1576 | gfc_symbol *sym; |
6de9cd9a DN |
1577 | |
1578 | initializer = NULL; | |
1579 | as = NULL; | |
83d890b9 | 1580 | cp_as = NULL; |
6de9cd9a DN |
1581 | |
1582 | /* When we get here, we've just matched a list of attributes and | |
1583 | maybe a type and a double colon. The next thing we expect to see | |
1584 | is the name of the symbol. */ | |
1585 | m = gfc_match_name (name); | |
1586 | if (m != MATCH_YES) | |
1587 | goto cleanup; | |
1588 | ||
63645982 | 1589 | var_locus = gfc_current_locus; |
6de9cd9a DN |
1590 | |
1591 | /* Now we could see the optional array spec. or character length. */ | |
1592 | m = gfc_match_array_spec (&as); | |
83d890b9 AL |
1593 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1594 | cp_as = gfc_copy_array_spec (as); | |
1595 | else if (m == MATCH_ERROR) | |
6de9cd9a | 1596 | goto cleanup; |
25d8f0a2 | 1597 | |
6de9cd9a DN |
1598 | if (m == MATCH_NO) |
1599 | as = gfc_copy_array_spec (current_as); | |
1600 | ||
1601 | char_len = NULL; | |
1602 | cl = NULL; | |
1603 | ||
1604 | if (current_ts.type == BT_CHARACTER) | |
1605 | { | |
1606 | switch (match_char_length (&char_len)) | |
1607 | { | |
1608 | case MATCH_YES: | |
b76e28c6 | 1609 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
6de9cd9a DN |
1610 | |
1611 | cl->length = char_len; | |
1612 | break; | |
1613 | ||
949d5b72 | 1614 | /* Non-constant lengths need to be copied after the first |
9b21a380 | 1615 | element. Also copy assumed lengths. */ |
6de9cd9a | 1616 | case MATCH_NO: |
9b21a380 | 1617 | if (elem > 1 |
bc21d315 JW |
1618 | && (current_ts.u.cl->length == NULL |
1619 | || current_ts.u.cl->length->expr_type != EXPR_CONSTANT)) | |
949d5b72 | 1620 | { |
b76e28c6 | 1621 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
bc21d315 | 1622 | cl->length = gfc_copy_expr (current_ts.u.cl->length); |
949d5b72 PT |
1623 | } |
1624 | else | |
bc21d315 | 1625 | cl = current_ts.u.cl; |
949d5b72 | 1626 | |
6de9cd9a DN |
1627 | break; |
1628 | ||
1629 | case MATCH_ERROR: | |
1630 | goto cleanup; | |
1631 | } | |
1632 | } | |
1633 | ||
83d890b9 | 1634 | /* If this symbol has already shown up in a Cray Pointer declaration, |
66e4ab31 | 1635 | then we want to set the type & bail out. */ |
83d890b9 AL |
1636 | if (gfc_option.flag_cray_pointer) |
1637 | { | |
1638 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1639 | if (sym != NULL && sym->attr.cray_pointee) | |
1640 | { | |
1641 | sym->ts.type = current_ts.type; | |
1642 | sym->ts.kind = current_ts.kind; | |
bc21d315 JW |
1643 | sym->ts.u.cl = cl; |
1644 | sym->ts.u.derived = current_ts.u.derived; | |
a8b3b0b6 CR |
1645 | sym->ts.is_c_interop = current_ts.is_c_interop; |
1646 | sym->ts.is_iso_c = current_ts.is_iso_c; | |
83d890b9 AL |
1647 | m = MATCH_YES; |
1648 | ||
1649 | /* Check to see if we have an array specification. */ | |
1650 | if (cp_as != NULL) | |
1651 | { | |
1652 | if (sym->as != NULL) | |
1653 | { | |
e25a0da3 | 1654 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
83d890b9 AL |
1655 | gfc_free_array_spec (cp_as); |
1656 | m = MATCH_ERROR; | |
1657 | goto cleanup; | |
1658 | } | |
1659 | else | |
1660 | { | |
1661 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1662 | gfc_internal_error ("Couldn't set pointee array spec."); | |
d51347f9 | 1663 | |
83d890b9 | 1664 | /* Fix the array spec. */ |
d51347f9 | 1665 | m = gfc_mod_pointee_as (sym->as); |
83d890b9 AL |
1666 | if (m == MATCH_ERROR) |
1667 | goto cleanup; | |
1668 | } | |
d51347f9 | 1669 | } |
83d890b9 AL |
1670 | goto cleanup; |
1671 | } | |
1672 | else | |
1673 | { | |
1674 | gfc_free_array_spec (cp_as); | |
1675 | } | |
1676 | } | |
d51347f9 | 1677 | |
3070bab4 JW |
1678 | /* Procedure pointer as function result. */ |
1679 | if (gfc_current_state () == COMP_FUNCTION | |
1680 | && strcmp ("ppr@", gfc_current_block ()->name) == 0 | |
1681 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0) | |
1682 | strcpy (name, "ppr@"); | |
1683 | ||
1684 | if (gfc_current_state () == COMP_FUNCTION | |
1685 | && strcmp (name, gfc_current_block ()->name) == 0 | |
1686 | && gfc_current_block ()->result | |
1687 | && strcmp ("ppr@", gfc_current_block ()->result->name) == 0) | |
1688 | strcpy (name, "ppr@"); | |
d51347f9 | 1689 | |
6de9cd9a DN |
1690 | /* OK, we've successfully matched the declaration. Now put the |
1691 | symbol in the current namespace, because it might be used in the | |
69de3b83 | 1692 | optional initialization expression for this symbol, e.g. this is |
6de9cd9a DN |
1693 | perfectly legal: |
1694 | ||
1695 | integer, parameter :: i = huge(i) | |
1696 | ||
1697 | This is only true for parameters or variables of a basic type. | |
1698 | For components of derived types, it is not true, so we don't | |
1699 | create a symbol for those yet. If we fail to create the symbol, | |
1700 | bail out. */ | |
1701 | if (gfc_current_state () != COMP_DERIVED | |
1702 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1703 | { | |
72af9f0b PT |
1704 | m = MATCH_ERROR; |
1705 | goto cleanup; | |
1706 | } | |
1707 | ||
6133c68a TS |
1708 | /* An interface body specifies all of the procedure's |
1709 | characteristics and these shall be consistent with those | |
1710 | specified in the procedure definition, except that the interface | |
1711 | may specify a procedure that is not pure if the procedure is | |
1712 | defined to be pure(12.3.2). */ | |
72af9f0b | 1713 | if (current_ts.type == BT_DERIVED |
636dff67 SK |
1714 | && gfc_current_ns->proc_name |
1715 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
bc21d315 | 1716 | && current_ts.u.derived->ns != gfc_current_ns) |
5a8af0b4 PT |
1717 | { |
1718 | gfc_symtree *st; | |
bc21d315 JW |
1719 | st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.u.derived->name); |
1720 | if (!(current_ts.u.derived->attr.imported | |
5a8af0b4 | 1721 | && st != NULL |
bc21d315 | 1722 | && st->n.sym == current_ts.u.derived) |
5a8af0b4 PT |
1723 | && !gfc_current_ns->has_import_set) |
1724 | { | |
1725 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1726 | "interface", name); | |
1727 | m = MATCH_ERROR; | |
1728 | goto cleanup; | |
1729 | } | |
6de9cd9a DN |
1730 | } |
1731 | ||
1732 | /* In functions that have a RESULT variable defined, the function | |
1733 | name always refers to function calls. Therefore, the name is | |
1734 | not allowed to appear in specification statements. */ | |
1735 | if (gfc_current_state () == COMP_FUNCTION | |
1736 | && gfc_current_block () != NULL | |
1737 | && gfc_current_block ()->result != NULL | |
1738 | && gfc_current_block ()->result != gfc_current_block () | |
1739 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1740 | { | |
1741 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1742 | m = MATCH_ERROR; | |
1743 | goto cleanup; | |
1744 | } | |
1745 | ||
294fbfc8 TS |
1746 | /* We allow old-style initializations of the form |
1747 | integer i /2/, j(4) /3*3, 1/ | |
1748 | (if no colon has been seen). These are different from data | |
1749 | statements in that initializers are only allowed to apply to the | |
1750 | variable immediately preceding, i.e. | |
1751 | integer i, j /1, 2/ | |
1752 | is not allowed. Therefore we have to do some work manually, that | |
75d17889 | 1753 | could otherwise be left to the matchers for DATA statements. */ |
294fbfc8 TS |
1754 | |
1755 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1756 | { | |
1757 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1758 | "initialization at %C") == FAILURE) | |
1759 | return MATCH_ERROR; | |
d51347f9 | 1760 | |
294fbfc8 TS |
1761 | return match_old_style_init (name); |
1762 | } | |
1763 | ||
6de9cd9a DN |
1764 | /* The double colon must be present in order to have initializers. |
1765 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1766 | if (colon_seen) | |
1767 | { | |
1768 | if (gfc_match (" =>") == MATCH_YES) | |
1769 | { | |
6de9cd9a DN |
1770 | if (!current_attr.pointer) |
1771 | { | |
1772 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1773 | m = MATCH_ERROR; | |
1774 | goto cleanup; | |
1775 | } | |
1776 | ||
1777 | m = gfc_match_null (&initializer); | |
1778 | if (m == MATCH_NO) | |
1779 | { | |
def66134 | 1780 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
6de9cd9a DN |
1781 | m = MATCH_ERROR; |
1782 | } | |
1783 | ||
26d3d4f4 | 1784 | if (gfc_pure (NULL) && gfc_state_stack->state != COMP_DERIVED) |
6de9cd9a | 1785 | { |
636dff67 SK |
1786 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1787 | "a PURE procedure"); | |
6de9cd9a DN |
1788 | m = MATCH_ERROR; |
1789 | } | |
1790 | ||
1791 | if (m != MATCH_YES) | |
1792 | goto cleanup; | |
1793 | ||
6de9cd9a DN |
1794 | } |
1795 | else if (gfc_match_char ('=') == MATCH_YES) | |
1796 | { | |
1797 | if (current_attr.pointer) | |
1798 | { | |
636dff67 SK |
1799 | gfc_error ("Pointer initialization at %C requires '=>', " |
1800 | "not '='"); | |
6de9cd9a DN |
1801 | m = MATCH_ERROR; |
1802 | goto cleanup; | |
1803 | } | |
1804 | ||
1805 | m = gfc_match_init_expr (&initializer); | |
1806 | if (m == MATCH_NO) | |
1807 | { | |
1808 | gfc_error ("Expected an initialization expression at %C"); | |
1809 | m = MATCH_ERROR; | |
1810 | } | |
1811 | ||
ade20620 TB |
1812 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL) |
1813 | && gfc_state_stack->state != COMP_DERIVED) | |
6de9cd9a | 1814 | { |
636dff67 SK |
1815 | gfc_error ("Initialization of variable at %C is not allowed in " |
1816 | "a PURE procedure"); | |
6de9cd9a DN |
1817 | m = MATCH_ERROR; |
1818 | } | |
1819 | ||
1820 | if (m != MATCH_YES) | |
1821 | goto cleanup; | |
1822 | } | |
cb44ab82 VL |
1823 | } |
1824 | ||
5046aff5 PT |
1825 | if (initializer != NULL && current_attr.allocatable |
1826 | && gfc_current_state () == COMP_DERIVED) | |
1827 | { | |
636dff67 SK |
1828 | gfc_error ("Initialization of allocatable component at %C is not " |
1829 | "allowed"); | |
5046aff5 PT |
1830 | m = MATCH_ERROR; |
1831 | goto cleanup; | |
1832 | } | |
1833 | ||
54b4ba60 | 1834 | /* Add the initializer. Note that it is fine if initializer is |
6de9cd9a DN |
1835 | NULL here, because we sometimes also need to check if a |
1836 | declaration *must* have an initialization expression. */ | |
1837 | if (gfc_current_state () != COMP_DERIVED) | |
1838 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1839 | else | |
54b4ba60 | 1840 | { |
5046aff5 | 1841 | if (current_ts.type == BT_DERIVED |
636dff67 | 1842 | && !current_attr.pointer && !initializer) |
54b4ba60 PB |
1843 | initializer = gfc_default_initializer (¤t_ts); |
1844 | t = build_struct (name, cl, &initializer, &as); | |
1845 | } | |
6de9cd9a DN |
1846 | |
1847 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1848 | ||
1849 | cleanup: | |
1850 | /* Free stuff up and return. */ | |
1851 | gfc_free_expr (initializer); | |
1852 | gfc_free_array_spec (as); | |
1853 | ||
1854 | return m; | |
1855 | } | |
1856 | ||
1857 | ||
b2b81a3f BM |
1858 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
1859 | This assumes that the byte size is equal to the kind number for | |
1860 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
6de9cd9a DN |
1861 | |
1862 | match | |
636dff67 | 1863 | gfc_match_old_kind_spec (gfc_typespec *ts) |
6de9cd9a DN |
1864 | { |
1865 | match m; | |
5cf54585 | 1866 | int original_kind; |
6de9cd9a DN |
1867 | |
1868 | if (gfc_match_char ('*') != MATCH_YES) | |
1869 | return MATCH_NO; | |
1870 | ||
5cf54585 | 1871 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
6de9cd9a DN |
1872 | if (m != MATCH_YES) |
1873 | return MATCH_ERROR; | |
1874 | ||
e45b3c75 ES |
1875 | original_kind = ts->kind; |
1876 | ||
6de9cd9a | 1877 | /* Massage the kind numbers for complex types. */ |
e45b3c75 ES |
1878 | if (ts->type == BT_COMPLEX) |
1879 | { | |
1880 | if (ts->kind % 2) | |
636dff67 SK |
1881 | { |
1882 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
1883 | gfc_basic_typename (ts->type), original_kind); | |
1884 | return MATCH_ERROR; | |
1885 | } | |
e45b3c75 ES |
1886 | ts->kind /= 2; |
1887 | } | |
6de9cd9a | 1888 | |
e7a2d5fb | 1889 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a | 1890 | { |
e45b3c75 | 1891 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
636dff67 | 1892 | gfc_basic_typename (ts->type), original_kind); |
6de9cd9a DN |
1893 | return MATCH_ERROR; |
1894 | } | |
1895 | ||
df8652dc SK |
1896 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
1897 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
1898 | return MATCH_ERROR; | |
1899 | ||
6de9cd9a DN |
1900 | return MATCH_YES; |
1901 | } | |
1902 | ||
1903 | ||
1904 | /* Match a kind specification. Since kinds are generally optional, we | |
1905 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
1906 | string is found, then we know we have an error. */ | |
1907 | ||
1908 | match | |
e2d29968 | 1909 | gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only) |
6de9cd9a | 1910 | { |
e2d29968 | 1911 | locus where, loc; |
6de9cd9a DN |
1912 | gfc_expr *e; |
1913 | match m, n; | |
96ee3a4a | 1914 | char c; |
6de9cd9a DN |
1915 | const char *msg; |
1916 | ||
1917 | m = MATCH_NO; | |
e2d29968 | 1918 | n = MATCH_YES; |
6de9cd9a DN |
1919 | e = NULL; |
1920 | ||
e2d29968 PT |
1921 | where = loc = gfc_current_locus; |
1922 | ||
1923 | if (kind_expr_only) | |
1924 | goto kind_expr; | |
6de9cd9a DN |
1925 | |
1926 | if (gfc_match_char ('(') == MATCH_NO) | |
1927 | return MATCH_NO; | |
1928 | ||
1929 | /* Also gobbles optional text. */ | |
1930 | if (gfc_match (" kind = ") == MATCH_YES) | |
1931 | m = MATCH_ERROR; | |
1932 | ||
e2d29968 PT |
1933 | loc = gfc_current_locus; |
1934 | ||
1935 | kind_expr: | |
6de9cd9a | 1936 | n = gfc_match_init_expr (&e); |
e2d29968 | 1937 | |
6de9cd9a | 1938 | if (n != MATCH_YES) |
e2d29968 | 1939 | { |
1c8bcdf7 | 1940 | if (gfc_matching_function) |
e2d29968 | 1941 | { |
1c8bcdf7 PT |
1942 | /* The function kind expression might include use associated or |
1943 | imported parameters and try again after the specification | |
1944 | expressions..... */ | |
e2d29968 PT |
1945 | if (gfc_match_char (')') != MATCH_YES) |
1946 | { | |
1947 | gfc_error ("Missing right parenthesis at %C"); | |
1948 | m = MATCH_ERROR; | |
1949 | goto no_match; | |
1950 | } | |
1951 | ||
1952 | gfc_free_expr (e); | |
e2d29968 PT |
1953 | gfc_undo_symbols (); |
1954 | return MATCH_YES; | |
1955 | } | |
1956 | else | |
1957 | { | |
1958 | /* ....or else, the match is real. */ | |
1959 | if (n == MATCH_NO) | |
1960 | gfc_error ("Expected initialization expression at %C"); | |
1961 | if (n != MATCH_YES) | |
1962 | return MATCH_ERROR; | |
1963 | } | |
1964 | } | |
6de9cd9a DN |
1965 | |
1966 | if (e->rank != 0) | |
1967 | { | |
1968 | gfc_error ("Expected scalar initialization expression at %C"); | |
1969 | m = MATCH_ERROR; | |
1970 | goto no_match; | |
1971 | } | |
1972 | ||
1973 | msg = gfc_extract_int (e, &ts->kind); | |
1c8bcdf7 | 1974 | |
6de9cd9a DN |
1975 | if (msg != NULL) |
1976 | { | |
1977 | gfc_error (msg); | |
1978 | m = MATCH_ERROR; | |
1979 | goto no_match; | |
1980 | } | |
1981 | ||
a8b3b0b6 CR |
1982 | /* Before throwing away the expression, let's see if we had a |
1983 | C interoperable kind (and store the fact). */ | |
1984 | if (e->ts.is_c_interop == 1) | |
1985 | { | |
1986 | /* Mark this as c interoperable if being declared with one | |
1987 | of the named constants from iso_c_binding. */ | |
1988 | ts->is_c_interop = e->ts.is_iso_c; | |
1989 | ts->f90_type = e->ts.f90_type; | |
1990 | } | |
1991 | ||
6de9cd9a DN |
1992 | gfc_free_expr (e); |
1993 | e = NULL; | |
1994 | ||
a8b3b0b6 CR |
1995 | /* Ignore errors to this point, if we've gotten here. This means |
1996 | we ignore the m=MATCH_ERROR from above. */ | |
e7a2d5fb | 1997 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a DN |
1998 | { |
1999 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
2000 | gfc_basic_typename (ts->type)); | |
96ee3a4a TB |
2001 | gfc_current_locus = where; |
2002 | return MATCH_ERROR; | |
6de9cd9a | 2003 | } |
96ee3a4a | 2004 | |
2ec855f1 TB |
2005 | /* Warn if, e.g., c_int is used for a REAL variable, but not |
2006 | if, e.g., c_double is used for COMPLEX as the standard | |
2007 | explicitly says that the kind type parameter for complex and real | |
2008 | variable is the same, i.e. c_float == c_float_complex. */ | |
2009 | if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type | |
2010 | && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX) | |
2011 | || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL))) | |
2be51762 TB |
2012 | gfc_warning_now ("C kind type parameter is for type %s but type at %L " |
2013 | "is %s", gfc_basic_typename (ts->f90_type), &where, | |
2014 | gfc_basic_typename (ts->type)); | |
2ec855f1 | 2015 | |
96ee3a4a | 2016 | gfc_gobble_whitespace (); |
8fc541d3 FXC |
2017 | if ((c = gfc_next_ascii_char ()) != ')' |
2018 | && (ts->type != BT_CHARACTER || c != ',')) | |
6de9cd9a | 2019 | { |
96ee3a4a TB |
2020 | if (ts->type == BT_CHARACTER) |
2021 | gfc_error ("Missing right parenthesis or comma at %C"); | |
2022 | else | |
2023 | gfc_error ("Missing right parenthesis at %C"); | |
e2d29968 | 2024 | m = MATCH_ERROR; |
6de9cd9a | 2025 | } |
a8b3b0b6 CR |
2026 | else |
2027 | /* All tests passed. */ | |
2028 | m = MATCH_YES; | |
6de9cd9a | 2029 | |
a8b3b0b6 CR |
2030 | if(m == MATCH_ERROR) |
2031 | gfc_current_locus = where; | |
2032 | ||
2033 | /* Return what we know from the test(s). */ | |
2034 | return m; | |
6de9cd9a DN |
2035 | |
2036 | no_match: | |
2037 | gfc_free_expr (e); | |
63645982 | 2038 | gfc_current_locus = where; |
6de9cd9a DN |
2039 | return m; |
2040 | } | |
2041 | ||
2042 | ||
187de1ed FXC |
2043 | static match |
2044 | match_char_kind (int * kind, int * is_iso_c) | |
2045 | { | |
2046 | locus where; | |
2047 | gfc_expr *e; | |
2048 | match m, n; | |
2049 | const char *msg; | |
2050 | ||
2051 | m = MATCH_NO; | |
2052 | e = NULL; | |
2053 | where = gfc_current_locus; | |
2054 | ||
2055 | n = gfc_match_init_expr (&e); | |
96ee3a4a | 2056 | |
1c8bcdf7 | 2057 | if (n != MATCH_YES && gfc_matching_function) |
96ee3a4a | 2058 | { |
1c8bcdf7 PT |
2059 | /* The expression might include use-associated or imported |
2060 | parameters and try again after the specification | |
2061 | expressions. */ | |
96ee3a4a | 2062 | gfc_free_expr (e); |
96ee3a4a TB |
2063 | gfc_undo_symbols (); |
2064 | return MATCH_YES; | |
2065 | } | |
2066 | ||
187de1ed FXC |
2067 | if (n == MATCH_NO) |
2068 | gfc_error ("Expected initialization expression at %C"); | |
2069 | if (n != MATCH_YES) | |
2070 | return MATCH_ERROR; | |
2071 | ||
2072 | if (e->rank != 0) | |
2073 | { | |
2074 | gfc_error ("Expected scalar initialization expression at %C"); | |
2075 | m = MATCH_ERROR; | |
2076 | goto no_match; | |
2077 | } | |
2078 | ||
2079 | msg = gfc_extract_int (e, kind); | |
2080 | *is_iso_c = e->ts.is_iso_c; | |
2081 | if (msg != NULL) | |
2082 | { | |
2083 | gfc_error (msg); | |
2084 | m = MATCH_ERROR; | |
2085 | goto no_match; | |
2086 | } | |
2087 | ||
2088 | gfc_free_expr (e); | |
2089 | ||
2090 | /* Ignore errors to this point, if we've gotten here. This means | |
2091 | we ignore the m=MATCH_ERROR from above. */ | |
2092 | if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0) | |
2093 | { | |
2094 | gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind); | |
2095 | m = MATCH_ERROR; | |
2096 | } | |
2097 | else | |
2098 | /* All tests passed. */ | |
2099 | m = MATCH_YES; | |
2100 | ||
2101 | if (m == MATCH_ERROR) | |
2102 | gfc_current_locus = where; | |
2103 | ||
2104 | /* Return what we know from the test(s). */ | |
2105 | return m; | |
2106 | ||
2107 | no_match: | |
2108 | gfc_free_expr (e); | |
2109 | gfc_current_locus = where; | |
2110 | return m; | |
2111 | } | |
2112 | ||
8234e5e0 | 2113 | |
6de9cd9a DN |
2114 | /* Match the various kind/length specifications in a CHARACTER |
2115 | declaration. We don't return MATCH_NO. */ | |
2116 | ||
8234e5e0 SK |
2117 | match |
2118 | gfc_match_char_spec (gfc_typespec *ts) | |
6de9cd9a | 2119 | { |
187de1ed | 2120 | int kind, seen_length, is_iso_c; |
6de9cd9a DN |
2121 | gfc_charlen *cl; |
2122 | gfc_expr *len; | |
2123 | match m; | |
187de1ed | 2124 | |
6de9cd9a DN |
2125 | len = NULL; |
2126 | seen_length = 0; | |
187de1ed FXC |
2127 | kind = 0; |
2128 | is_iso_c = 0; | |
6de9cd9a DN |
2129 | |
2130 | /* Try the old-style specification first. */ | |
2131 | old_char_selector = 0; | |
2132 | ||
2133 | m = match_char_length (&len); | |
2134 | if (m != MATCH_NO) | |
2135 | { | |
2136 | if (m == MATCH_YES) | |
2137 | old_char_selector = 1; | |
2138 | seen_length = 1; | |
2139 | goto done; | |
2140 | } | |
2141 | ||
2142 | m = gfc_match_char ('('); | |
2143 | if (m != MATCH_YES) | |
2144 | { | |
a8b3b0b6 | 2145 | m = MATCH_YES; /* Character without length is a single char. */ |
6de9cd9a DN |
2146 | goto done; |
2147 | } | |
2148 | ||
a8b3b0b6 | 2149 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ |
6de9cd9a DN |
2150 | if (gfc_match (" kind =") == MATCH_YES) |
2151 | { | |
187de1ed | 2152 | m = match_char_kind (&kind, &is_iso_c); |
a8b3b0b6 | 2153 | |
6de9cd9a DN |
2154 | if (m == MATCH_ERROR) |
2155 | goto done; | |
2156 | if (m == MATCH_NO) | |
2157 | goto syntax; | |
2158 | ||
2159 | if (gfc_match (" , len =") == MATCH_NO) | |
2160 | goto rparen; | |
2161 | ||
2162 | m = char_len_param_value (&len); | |
2163 | if (m == MATCH_NO) | |
2164 | goto syntax; | |
2165 | if (m == MATCH_ERROR) | |
2166 | goto done; | |
2167 | seen_length = 1; | |
2168 | ||
2169 | goto rparen; | |
2170 | } | |
2171 | ||
66e4ab31 | 2172 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ |
6de9cd9a DN |
2173 | if (gfc_match (" len =") == MATCH_YES) |
2174 | { | |
2175 | m = char_len_param_value (&len); | |
2176 | if (m == MATCH_NO) | |
2177 | goto syntax; | |
2178 | if (m == MATCH_ERROR) | |
2179 | goto done; | |
2180 | seen_length = 1; | |
2181 | ||
2182 | if (gfc_match_char (')') == MATCH_YES) | |
2183 | goto done; | |
2184 | ||
2185 | if (gfc_match (" , kind =") != MATCH_YES) | |
2186 | goto syntax; | |
2187 | ||
187de1ed FXC |
2188 | if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR) |
2189 | goto done; | |
6de9cd9a DN |
2190 | |
2191 | goto rparen; | |
2192 | } | |
2193 | ||
66e4ab31 | 2194 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
6de9cd9a DN |
2195 | m = char_len_param_value (&len); |
2196 | if (m == MATCH_NO) | |
2197 | goto syntax; | |
2198 | if (m == MATCH_ERROR) | |
2199 | goto done; | |
2200 | seen_length = 1; | |
2201 | ||
2202 | m = gfc_match_char (')'); | |
2203 | if (m == MATCH_YES) | |
2204 | goto done; | |
2205 | ||
2206 | if (gfc_match_char (',') != MATCH_YES) | |
2207 | goto syntax; | |
2208 | ||
a8b3b0b6 | 2209 | gfc_match (" kind ="); /* Gobble optional text. */ |
6de9cd9a | 2210 | |
187de1ed | 2211 | m = match_char_kind (&kind, &is_iso_c); |
6de9cd9a DN |
2212 | if (m == MATCH_ERROR) |
2213 | goto done; | |
2214 | if (m == MATCH_NO) | |
2215 | goto syntax; | |
2216 | ||
2217 | rparen: | |
2218 | /* Require a right-paren at this point. */ | |
2219 | m = gfc_match_char (')'); | |
2220 | if (m == MATCH_YES) | |
2221 | goto done; | |
2222 | ||
2223 | syntax: | |
2224 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
2225 | m = MATCH_ERROR; | |
16f8ffc8 JD |
2226 | gfc_free_expr (len); |
2227 | return m; | |
6de9cd9a DN |
2228 | |
2229 | done: | |
a99d95a2 PT |
2230 | /* Deal with character functions after USE and IMPORT statements. */ |
2231 | if (gfc_matching_function) | |
1c8bcdf7 | 2232 | { |
a99d95a2 | 2233 | gfc_free_expr (len); |
1c8bcdf7 PT |
2234 | gfc_undo_symbols (); |
2235 | return MATCH_YES; | |
2236 | } | |
2237 | ||
6de9cd9a DN |
2238 | if (m != MATCH_YES) |
2239 | { | |
2240 | gfc_free_expr (len); | |
2241 | return m; | |
2242 | } | |
2243 | ||
2244 | /* Do some final massaging of the length values. */ | |
b76e28c6 | 2245 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
6de9cd9a DN |
2246 | |
2247 | if (seen_length == 0) | |
2248 | cl->length = gfc_int_expr (1); | |
2249 | else | |
5cd09fac | 2250 | cl->length = len; |
6de9cd9a | 2251 | |
bc21d315 | 2252 | ts->u.cl = cl; |
187de1ed | 2253 | ts->kind = kind == 0 ? gfc_default_character_kind : kind; |
6de9cd9a | 2254 | |
a8b3b0b6 CR |
2255 | /* We have to know if it was a c interoperable kind so we can |
2256 | do accurate type checking of bind(c) procs, etc. */ | |
187de1ed FXC |
2257 | if (kind != 0) |
2258 | /* Mark this as c interoperable if being declared with one | |
2259 | of the named constants from iso_c_binding. */ | |
2260 | ts->is_c_interop = is_iso_c; | |
a8b3b0b6 | 2261 | else if (len != NULL) |
187de1ed FXC |
2262 | /* Here, we might have parsed something such as: character(c_char) |
2263 | In this case, the parsing code above grabs the c_char when | |
2264 | looking for the length (line 1690, roughly). it's the last | |
2265 | testcase for parsing the kind params of a character variable. | |
2266 | However, it's not actually the length. this seems like it | |
2267 | could be an error. | |
2268 | To see if the user used a C interop kind, test the expr | |
2269 | of the so called length, and see if it's C interoperable. */ | |
2270 | ts->is_c_interop = len->ts.is_iso_c; | |
a8b3b0b6 | 2271 | |
6de9cd9a DN |
2272 | return MATCH_YES; |
2273 | } | |
2274 | ||
2275 | ||
e74f1cc8 JW |
2276 | /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts |
2277 | structure to the matched specification. This is necessary for FUNCTION and | |
6de9cd9a DN |
2278 | IMPLICIT statements. |
2279 | ||
d51347f9 | 2280 | If implicit_flag is nonzero, then we don't check for the optional |
e5ddaa24 | 2281 | kind specification. Not doing so is needed for matching an IMPLICIT |
6de9cd9a DN |
2282 | statement correctly. */ |
2283 | ||
e2d29968 | 2284 | match |
e74f1cc8 | 2285 | gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag) |
6de9cd9a DN |
2286 | { |
2287 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2288 | gfc_symbol *sym; | |
2289 | match m; | |
8fc541d3 | 2290 | char c; |
1c8bcdf7 | 2291 | bool seen_deferred_kind; |
6de9cd9a | 2292 | |
1c8bcdf7 PT |
2293 | /* A belt and braces check that the typespec is correctly being treated |
2294 | as a deferred characteristic association. */ | |
2295 | seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION) | |
a99d95a2 PT |
2296 | && (gfc_current_block ()->result->ts.kind == -1) |
2297 | && (ts->kind == -1); | |
6de9cd9a | 2298 | gfc_clear_ts (ts); |
1c8bcdf7 PT |
2299 | if (seen_deferred_kind) |
2300 | ts->kind = -1; | |
6de9cd9a | 2301 | |
a8b3b0b6 CR |
2302 | /* Clear the current binding label, in case one is given. */ |
2303 | curr_binding_label[0] = '\0'; | |
2304 | ||
5f700e6d AL |
2305 | if (gfc_match (" byte") == MATCH_YES) |
2306 | { | |
0b3624f6 | 2307 | if (gfc_notify_std (GFC_STD_GNU, "Extension: BYTE type at %C") |
5f700e6d AL |
2308 | == FAILURE) |
2309 | return MATCH_ERROR; | |
2310 | ||
2311 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
2312 | { | |
2313 | gfc_error ("BYTE type used at %C " | |
2314 | "is not available on the target machine"); | |
2315 | return MATCH_ERROR; | |
2316 | } | |
d51347f9 | 2317 | |
5f700e6d AL |
2318 | ts->type = BT_INTEGER; |
2319 | ts->kind = 1; | |
2320 | return MATCH_YES; | |
2321 | } | |
2322 | ||
6de9cd9a DN |
2323 | if (gfc_match (" integer") == MATCH_YES) |
2324 | { | |
2325 | ts->type = BT_INTEGER; | |
9d64df18 | 2326 | ts->kind = gfc_default_integer_kind; |
6de9cd9a DN |
2327 | goto get_kind; |
2328 | } | |
2329 | ||
2330 | if (gfc_match (" character") == MATCH_YES) | |
2331 | { | |
2332 | ts->type = BT_CHARACTER; | |
e5ddaa24 | 2333 | if (implicit_flag == 0) |
8234e5e0 | 2334 | return gfc_match_char_spec (ts); |
e5ddaa24 TS |
2335 | else |
2336 | return MATCH_YES; | |
6de9cd9a DN |
2337 | } |
2338 | ||
2339 | if (gfc_match (" real") == MATCH_YES) | |
2340 | { | |
2341 | ts->type = BT_REAL; | |
9d64df18 | 2342 | ts->kind = gfc_default_real_kind; |
6de9cd9a DN |
2343 | goto get_kind; |
2344 | } | |
2345 | ||
2346 | if (gfc_match (" double precision") == MATCH_YES) | |
2347 | { | |
2348 | ts->type = BT_REAL; | |
9d64df18 | 2349 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
2350 | return MATCH_YES; |
2351 | } | |
2352 | ||
2353 | if (gfc_match (" complex") == MATCH_YES) | |
2354 | { | |
2355 | ts->type = BT_COMPLEX; | |
9d64df18 | 2356 | ts->kind = gfc_default_complex_kind; |
6de9cd9a DN |
2357 | goto get_kind; |
2358 | } | |
2359 | ||
2360 | if (gfc_match (" double complex") == MATCH_YES) | |
2361 | { | |
df8652dc SK |
2362 | if (gfc_notify_std (GFC_STD_GNU, "DOUBLE COMPLEX at %C does not " |
2363 | "conform to the Fortran 95 standard") == FAILURE) | |
2364 | return MATCH_ERROR; | |
2365 | ||
6de9cd9a | 2366 | ts->type = BT_COMPLEX; |
9d64df18 | 2367 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
2368 | return MATCH_YES; |
2369 | } | |
2370 | ||
2371 | if (gfc_match (" logical") == MATCH_YES) | |
2372 | { | |
2373 | ts->type = BT_LOGICAL; | |
9d64df18 | 2374 | ts->kind = gfc_default_logical_kind; |
6de9cd9a DN |
2375 | goto get_kind; |
2376 | } | |
2377 | ||
2378 | m = gfc_match (" type ( %n )", name); | |
cf2b3c22 TB |
2379 | if (m == MATCH_YES) |
2380 | ts->type = BT_DERIVED; | |
2381 | else | |
727e8544 JW |
2382 | { |
2383 | m = gfc_match (" class ( %n )", name); | |
2384 | if (m != MATCH_YES) | |
2385 | return m; | |
cf2b3c22 | 2386 | ts->type = BT_CLASS; |
727e8544 | 2387 | |
e74f1cc8 JW |
2388 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: CLASS statement at %C") |
2389 | == FAILURE) | |
2390 | return MATCH_ERROR; | |
727e8544 | 2391 | } |
6de9cd9a | 2392 | |
1c8bcdf7 PT |
2393 | /* Defer association of the derived type until the end of the |
2394 | specification block. However, if the derived type can be | |
2395 | found, add it to the typespec. */ | |
2396 | if (gfc_matching_function) | |
e2d29968 | 2397 | { |
bc21d315 | 2398 | ts->u.derived = NULL; |
1c8bcdf7 PT |
2399 | if (gfc_current_state () != COMP_INTERFACE |
2400 | && !gfc_find_symbol (name, NULL, 1, &sym) && sym) | |
bc21d315 | 2401 | ts->u.derived = sym; |
e2d29968 PT |
2402 | return MATCH_YES; |
2403 | } | |
2404 | ||
2405 | /* Search for the name but allow the components to be defined later. If | |
2406 | type = -1, this typespec has been seen in a function declaration but | |
1c8bcdf7 PT |
2407 | the type could not be accessed at that point. */ |
2408 | sym = NULL; | |
e2d29968 | 2409 | if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym)) |
6de9cd9a DN |
2410 | { |
2411 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2412 | return MATCH_ERROR; | |
2413 | } | |
e2d29968 PT |
2414 | else if (ts->kind == -1) |
2415 | { | |
1c8bcdf7 PT |
2416 | int iface = gfc_state_stack->previous->state != COMP_INTERFACE |
2417 | || gfc_current_ns->has_import_set; | |
2418 | if (gfc_find_symbol (name, NULL, iface, &sym)) | |
e2d29968 PT |
2419 | { |
2420 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2421 | return MATCH_ERROR; | |
2422 | } | |
2423 | ||
1c8bcdf7 | 2424 | ts->kind = 0; |
e2d29968 PT |
2425 | if (sym == NULL) |
2426 | return MATCH_NO; | |
2427 | } | |
6de9cd9a DN |
2428 | |
2429 | if (sym->attr.flavor != FL_DERIVED | |
231b2fcc | 2430 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
2431 | return MATCH_ERROR; |
2432 | ||
1c8bcdf7 | 2433 | gfc_set_sym_referenced (sym); |
bc21d315 | 2434 | ts->u.derived = sym; |
6de9cd9a DN |
2435 | |
2436 | return MATCH_YES; | |
2437 | ||
2438 | get_kind: | |
2439 | /* For all types except double, derived and character, look for an | |
2440 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
e5ddaa24 | 2441 | if (implicit_flag == 1) |
6de9cd9a DN |
2442 | return MATCH_YES; |
2443 | ||
0ff0dfbf TS |
2444 | if (gfc_current_form == FORM_FREE) |
2445 | { | |
0b3624f6 SK |
2446 | c = gfc_peek_ascii_char (); |
2447 | if (!gfc_is_whitespace (c) && c != '*' && c != '(' | |
636dff67 | 2448 | && c != ':' && c != ',') |
0ff0dfbf TS |
2449 | return MATCH_NO; |
2450 | } | |
2451 | ||
e2d29968 | 2452 | m = gfc_match_kind_spec (ts, false); |
6de9cd9a DN |
2453 | if (m == MATCH_NO && ts->type != BT_CHARACTER) |
2454 | m = gfc_match_old_kind_spec (ts); | |
2455 | ||
1c8bcdf7 PT |
2456 | /* Defer association of the KIND expression of function results |
2457 | until after USE and IMPORT statements. */ | |
2458 | if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ()) | |
2459 | || gfc_matching_function) | |
2460 | return MATCH_YES; | |
2461 | ||
6de9cd9a DN |
2462 | if (m == MATCH_NO) |
2463 | m = MATCH_YES; /* No kind specifier found. */ | |
2464 | ||
2465 | return m; | |
2466 | } | |
2467 | ||
2468 | ||
e5ddaa24 TS |
2469 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
2470 | already matched in parse.c, or we would not end up here in the | |
2471 | first place. So the only thing we need to check, is if there is | |
2472 | trailing garbage. If not, the match is successful. */ | |
2473 | ||
2474 | match | |
2475 | gfc_match_implicit_none (void) | |
2476 | { | |
e5ddaa24 TS |
2477 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
2478 | } | |
2479 | ||
2480 | ||
2481 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
2482 | ||
2483 | static match | |
1107b970 | 2484 | match_implicit_range (void) |
e5ddaa24 | 2485 | { |
8fc541d3 FXC |
2486 | char c, c1, c2; |
2487 | int inner; | |
e5ddaa24 TS |
2488 | locus cur_loc; |
2489 | ||
2490 | cur_loc = gfc_current_locus; | |
2491 | ||
2492 | gfc_gobble_whitespace (); | |
8fc541d3 | 2493 | c = gfc_next_ascii_char (); |
e5ddaa24 TS |
2494 | if (c != '(') |
2495 | { | |
2496 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
2497 | goto bad; | |
2498 | } | |
2499 | ||
2500 | inner = 1; | |
2501 | while (inner) | |
2502 | { | |
2503 | gfc_gobble_whitespace (); | |
8fc541d3 | 2504 | c1 = gfc_next_ascii_char (); |
e5ddaa24 TS |
2505 | if (!ISALPHA (c1)) |
2506 | goto bad; | |
2507 | ||
2508 | gfc_gobble_whitespace (); | |
8fc541d3 | 2509 | c = gfc_next_ascii_char (); |
e5ddaa24 TS |
2510 | |
2511 | switch (c) | |
2512 | { | |
2513 | case ')': | |
66e4ab31 | 2514 | inner = 0; /* Fall through. */ |
e5ddaa24 TS |
2515 | |
2516 | case ',': | |
2517 | c2 = c1; | |
2518 | break; | |
2519 | ||
2520 | case '-': | |
2521 | gfc_gobble_whitespace (); | |
8fc541d3 | 2522 | c2 = gfc_next_ascii_char (); |
e5ddaa24 TS |
2523 | if (!ISALPHA (c2)) |
2524 | goto bad; | |
2525 | ||
2526 | gfc_gobble_whitespace (); | |
8fc541d3 | 2527 | c = gfc_next_ascii_char (); |
e5ddaa24 TS |
2528 | |
2529 | if ((c != ',') && (c != ')')) | |
2530 | goto bad; | |
2531 | if (c == ')') | |
2532 | inner = 0; | |
2533 | ||
2534 | break; | |
2535 | ||
2536 | default: | |
2537 | goto bad; | |
2538 | } | |
2539 | ||
2540 | if (c1 > c2) | |
2541 | { | |
2542 | gfc_error ("Letters must be in alphabetic order in " | |
2543 | "IMPLICIT statement at %C"); | |
2544 | goto bad; | |
2545 | } | |
2546 | ||
2547 | /* See if we can add the newly matched range to the pending | |
636dff67 SK |
2548 | implicits from this IMPLICIT statement. We do not check for |
2549 | conflicts with whatever earlier IMPLICIT statements may have | |
2550 | set. This is done when we've successfully finished matching | |
2551 | the current one. */ | |
1107b970 | 2552 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
e5ddaa24 TS |
2553 | goto bad; |
2554 | } | |
2555 | ||
2556 | return MATCH_YES; | |
2557 | ||
2558 | bad: | |
2559 | gfc_syntax_error (ST_IMPLICIT); | |
2560 | ||
2561 | gfc_current_locus = cur_loc; | |
2562 | return MATCH_ERROR; | |
2563 | } | |
2564 | ||
2565 | ||
2566 | /* Match an IMPLICIT statement, storing the types for | |
2567 | gfc_set_implicit() if the statement is accepted by the parser. | |
2568 | There is a strange looking, but legal syntactic construction | |
2569 | possible. It looks like: | |
2570 | ||
2571 | IMPLICIT INTEGER (a-b) (c-d) | |
2572 | ||
2573 | This is legal if "a-b" is a constant expression that happens to | |
2574 | equal one of the legal kinds for integers. The real problem | |
2575 | happens with an implicit specification that looks like: | |
2576 | ||
2577 | IMPLICIT INTEGER (a-b) | |
2578 | ||
2579 | In this case, a typespec matcher that is "greedy" (as most of the | |
2580 | matchers are) gobbles the character range as a kindspec, leaving | |
2581 | nothing left. We therefore have to go a bit more slowly in the | |
2582 | matching process by inhibiting the kindspec checking during | |
2583 | typespec matching and checking for a kind later. */ | |
2584 | ||
2585 | match | |
2586 | gfc_match_implicit (void) | |
2587 | { | |
2588 | gfc_typespec ts; | |
2589 | locus cur_loc; | |
8fc541d3 | 2590 | char c; |
e5ddaa24 TS |
2591 | match m; |
2592 | ||
44000dbb JD |
2593 | gfc_clear_ts (&ts); |
2594 | ||
e5ddaa24 TS |
2595 | /* We don't allow empty implicit statements. */ |
2596 | if (gfc_match_eos () == MATCH_YES) | |
2597 | { | |
2598 | gfc_error ("Empty IMPLICIT statement at %C"); | |
2599 | return MATCH_ERROR; | |
2600 | } | |
2601 | ||
e5ddaa24 TS |
2602 | do |
2603 | { | |
1107b970 PB |
2604 | /* First cleanup. */ |
2605 | gfc_clear_new_implicit (); | |
2606 | ||
e5ddaa24 | 2607 | /* A basic type is mandatory here. */ |
e74f1cc8 | 2608 | m = gfc_match_decl_type_spec (&ts, 1); |
e5ddaa24 TS |
2609 | if (m == MATCH_ERROR) |
2610 | goto error; | |
2611 | if (m == MATCH_NO) | |
2612 | goto syntax; | |
2613 | ||
2614 | cur_loc = gfc_current_locus; | |
1107b970 | 2615 | m = match_implicit_range (); |
e5ddaa24 TS |
2616 | |
2617 | if (m == MATCH_YES) | |
2618 | { | |
1107b970 | 2619 | /* We may have <TYPE> (<RANGE>). */ |
e5ddaa24 | 2620 | gfc_gobble_whitespace (); |
8fc541d3 | 2621 | c = gfc_next_ascii_char (); |
e5ddaa24 | 2622 | if ((c == '\n') || (c == ',')) |
1107b970 PB |
2623 | { |
2624 | /* Check for CHARACTER with no length parameter. */ | |
bc21d315 | 2625 | if (ts.type == BT_CHARACTER && !ts.u.cl) |
1107b970 | 2626 | { |
9d64df18 | 2627 | ts.kind = gfc_default_character_kind; |
b76e28c6 | 2628 | ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
bc21d315 | 2629 | ts.u.cl->length = gfc_int_expr (1); |
1107b970 PB |
2630 | } |
2631 | ||
2632 | /* Record the Successful match. */ | |
2633 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2634 | return MATCH_ERROR; | |
2635 | continue; | |
2636 | } | |
e5ddaa24 TS |
2637 | |
2638 | gfc_current_locus = cur_loc; | |
2639 | } | |
2640 | ||
1107b970 PB |
2641 | /* Discard the (incorrectly) matched range. */ |
2642 | gfc_clear_new_implicit (); | |
2643 | ||
2644 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
2645 | if (ts.type == BT_CHARACTER) | |
8234e5e0 | 2646 | m = gfc_match_char_spec (&ts); |
1107b970 | 2647 | else |
e5ddaa24 | 2648 | { |
e2d29968 | 2649 | m = gfc_match_kind_spec (&ts, false); |
e5ddaa24 | 2650 | if (m == MATCH_NO) |
1107b970 PB |
2651 | { |
2652 | m = gfc_match_old_kind_spec (&ts); | |
2653 | if (m == MATCH_ERROR) | |
2654 | goto error; | |
2655 | if (m == MATCH_NO) | |
2656 | goto syntax; | |
2657 | } | |
e5ddaa24 | 2658 | } |
1107b970 PB |
2659 | if (m == MATCH_ERROR) |
2660 | goto error; | |
e5ddaa24 | 2661 | |
1107b970 | 2662 | m = match_implicit_range (); |
e5ddaa24 TS |
2663 | if (m == MATCH_ERROR) |
2664 | goto error; | |
2665 | if (m == MATCH_NO) | |
2666 | goto syntax; | |
2667 | ||
2668 | gfc_gobble_whitespace (); | |
8fc541d3 | 2669 | c = gfc_next_ascii_char (); |
e5ddaa24 TS |
2670 | if ((c != '\n') && (c != ',')) |
2671 | goto syntax; | |
2672 | ||
1107b970 PB |
2673 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2674 | return MATCH_ERROR; | |
e5ddaa24 TS |
2675 | } |
2676 | while (c == ','); | |
2677 | ||
1107b970 | 2678 | return MATCH_YES; |
e5ddaa24 TS |
2679 | |
2680 | syntax: | |
2681 | gfc_syntax_error (ST_IMPLICIT); | |
2682 | ||
2683 | error: | |
2684 | return MATCH_ERROR; | |
2685 | } | |
2686 | ||
66e4ab31 | 2687 | |
8998be20 TB |
2688 | match |
2689 | gfc_match_import (void) | |
2690 | { | |
2691 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2692 | match m; | |
2693 | gfc_symbol *sym; | |
2694 | gfc_symtree *st; | |
2695 | ||
66e4ab31 SK |
2696 | if (gfc_current_ns->proc_name == NULL |
2697 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
8998be20 TB |
2698 | { |
2699 | gfc_error ("IMPORT statement at %C only permitted in " | |
2700 | "an INTERFACE body"); | |
2701 | return MATCH_ERROR; | |
2702 | } | |
2703 | ||
636dff67 | 2704 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
8998be20 TB |
2705 | == FAILURE) |
2706 | return MATCH_ERROR; | |
2707 | ||
2708 | if (gfc_match_eos () == MATCH_YES) | |
2709 | { | |
2710 | /* All host variables should be imported. */ | |
2711 | gfc_current_ns->has_import_set = 1; | |
2712 | return MATCH_YES; | |
2713 | } | |
2714 | ||
2715 | if (gfc_match (" ::") == MATCH_YES) | |
2716 | { | |
2717 | if (gfc_match_eos () == MATCH_YES) | |
636dff67 SK |
2718 | { |
2719 | gfc_error ("Expecting list of named entities at %C"); | |
2720 | return MATCH_ERROR; | |
2721 | } | |
8998be20 TB |
2722 | } |
2723 | ||
2724 | for(;;) | |
2725 | { | |
2726 | m = gfc_match (" %n", name); | |
2727 | switch (m) | |
2728 | { | |
2729 | case MATCH_YES: | |
36d3fb4c | 2730 | if (gfc_current_ns->parent != NULL |
66e4ab31 | 2731 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
36d3fb4c PT |
2732 | { |
2733 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2734 | return MATCH_ERROR; | |
2735 | } | |
2736 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
66e4ab31 SK |
2737 | && gfc_find_symbol (name, |
2738 | gfc_current_ns->proc_name->ns->parent, | |
2739 | 1, &sym)) | |
636dff67 SK |
2740 | { |
2741 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2742 | return MATCH_ERROR; | |
2743 | } | |
2744 | ||
2745 | if (sym == NULL) | |
2746 | { | |
2747 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2748 | "at %C - does not exist.", name); | |
2749 | return MATCH_ERROR; | |
2750 | } | |
2751 | ||
d51347f9 | 2752 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) |
636dff67 SK |
2753 | { |
2754 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2755 | "at %C.", name); | |
2756 | goto next_item; | |
2757 | } | |
2758 | ||
bc2a4733 | 2759 | st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name); |
636dff67 SK |
2760 | st->n.sym = sym; |
2761 | sym->refs++; | |
5a8af0b4 | 2762 | sym->attr.imported = 1; |
8998be20 TB |
2763 | |
2764 | goto next_item; | |
2765 | ||
2766 | case MATCH_NO: | |
2767 | break; | |
2768 | ||
2769 | case MATCH_ERROR: | |
2770 | return MATCH_ERROR; | |
2771 | } | |
2772 | ||
2773 | next_item: | |
2774 | if (gfc_match_eos () == MATCH_YES) | |
2775 | break; | |
2776 | if (gfc_match_char (',') != MATCH_YES) | |
2777 | goto syntax; | |
2778 | } | |
2779 | ||
2780 | return MATCH_YES; | |
2781 | ||
2782 | syntax: | |
2783 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2784 | return MATCH_ERROR; | |
2785 | } | |
e5ddaa24 | 2786 | |
66e4ab31 | 2787 | |
f2449db4 RS |
2788 | /* A minimal implementation of gfc_match without whitespace, escape |
2789 | characters or variable arguments. Returns true if the next | |
2790 | characters match the TARGET template exactly. */ | |
2791 | ||
2792 | static bool | |
2793 | match_string_p (const char *target) | |
2794 | { | |
2795 | const char *p; | |
2796 | ||
2797 | for (p = target; *p; p++) | |
8fc541d3 | 2798 | if ((char) gfc_next_ascii_char () != *p) |
f2449db4 RS |
2799 | return false; |
2800 | return true; | |
2801 | } | |
2802 | ||
6de9cd9a DN |
2803 | /* Matches an attribute specification including array specs. If |
2804 | successful, leaves the variables current_attr and current_as | |
2805 | holding the specification. Also sets the colon_seen variable for | |
2806 | later use by matchers associated with initializations. | |
2807 | ||
2808 | This subroutine is a little tricky in the sense that we don't know | |
2809 | if we really have an attr-spec until we hit the double colon. | |
2810 | Until that time, we can only return MATCH_NO. This forces us to | |
2811 | check for duplicate specification at this level. */ | |
2812 | ||
2813 | static match | |
2814 | match_attr_spec (void) | |
2815 | { | |
6de9cd9a DN |
2816 | /* Modifiers that can exist in a type statement. */ |
2817 | typedef enum | |
2818 | { GFC_DECL_BEGIN = 0, | |
2819 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
2820 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
ee7e677f TB |
2821 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
2822 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
1eee5628 | 2823 | DECL_IS_BIND_C, DECL_ASYNCHRONOUS, DECL_NONE, |
6de9cd9a DN |
2824 | GFC_DECL_END /* Sentinel */ |
2825 | } | |
2826 | decl_types; | |
2827 | ||
2828 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
2829 | #define NUM_DECL GFC_DECL_END | |
2830 | ||
6de9cd9a DN |
2831 | locus start, seen_at[NUM_DECL]; |
2832 | int seen[NUM_DECL]; | |
09639a83 | 2833 | unsigned int d; |
6de9cd9a DN |
2834 | const char *attr; |
2835 | match m; | |
17b1d2a0 | 2836 | gfc_try t; |
6de9cd9a DN |
2837 | |
2838 | gfc_clear_attr (¤t_attr); | |
63645982 | 2839 | start = gfc_current_locus; |
6de9cd9a DN |
2840 | |
2841 | current_as = NULL; | |
2842 | colon_seen = 0; | |
2843 | ||
2844 | /* See if we get all of the keywords up to the final double colon. */ | |
2845 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
2846 | seen[d] = 0; | |
2847 | ||
2848 | for (;;) | |
2849 | { | |
8fc541d3 | 2850 | char ch; |
a8b3b0b6 | 2851 | |
f2449db4 RS |
2852 | d = DECL_NONE; |
2853 | gfc_gobble_whitespace (); | |
2854 | ||
8fc541d3 | 2855 | ch = gfc_next_ascii_char (); |
f2449db4 RS |
2856 | if (ch == ':') |
2857 | { | |
2858 | /* This is the successful exit condition for the loop. */ | |
8fc541d3 | 2859 | if (gfc_next_ascii_char () == ':') |
f2449db4 RS |
2860 | break; |
2861 | } | |
2862 | else if (ch == ',') | |
a8b3b0b6 | 2863 | { |
a8b3b0b6 | 2864 | gfc_gobble_whitespace (); |
8fc541d3 | 2865 | switch (gfc_peek_ascii_char ()) |
a8b3b0b6 | 2866 | { |
f2449db4 | 2867 | case 'a': |
1eee5628 TB |
2868 | gfc_next_ascii_char (); |
2869 | switch (gfc_next_ascii_char ()) | |
2870 | { | |
2871 | case 'l': | |
2872 | if (match_string_p ("locatable")) | |
2873 | { | |
2874 | /* Matched "allocatable". */ | |
2875 | d = DECL_ALLOCATABLE; | |
2876 | } | |
2877 | break; | |
2878 | ||
2879 | case 's': | |
2880 | if (match_string_p ("ynchronous")) | |
2881 | { | |
2882 | /* Matched "asynchronous". */ | |
2883 | d = DECL_ASYNCHRONOUS; | |
2884 | } | |
2885 | break; | |
2886 | } | |
f2449db4 RS |
2887 | |
2888 | case 'b': | |
a8b3b0b6 | 2889 | /* Try and match the bind(c). */ |
1eabf70a | 2890 | m = gfc_match_bind_c (NULL, true); |
129d15a3 | 2891 | if (m == MATCH_YES) |
a8b3b0b6 | 2892 | d = DECL_IS_BIND_C; |
129d15a3 JW |
2893 | else if (m == MATCH_ERROR) |
2894 | goto cleanup; | |
f2449db4 RS |
2895 | break; |
2896 | ||
2897 | case 'd': | |
2898 | if (match_string_p ("dimension")) | |
2899 | d = DECL_DIMENSION; | |
2900 | break; | |
2901 | ||
2902 | case 'e': | |
2903 | if (match_string_p ("external")) | |
2904 | d = DECL_EXTERNAL; | |
2905 | break; | |
2906 | ||
2907 | case 'i': | |
2908 | if (match_string_p ("int")) | |
2909 | { | |
8fc541d3 | 2910 | ch = gfc_next_ascii_char (); |
f2449db4 RS |
2911 | if (ch == 'e') |
2912 | { | |
2913 | if (match_string_p ("nt")) | |
2914 | { | |
2915 | /* Matched "intent". */ | |
2916 | /* TODO: Call match_intent_spec from here. */ | |
2917 | if (gfc_match (" ( in out )") == MATCH_YES) | |
2918 | d = DECL_INOUT; | |
2919 | else if (gfc_match (" ( in )") == MATCH_YES) | |
2920 | d = DECL_IN; | |
2921 | else if (gfc_match (" ( out )") == MATCH_YES) | |
2922 | d = DECL_OUT; | |
2923 | } | |
2924 | } | |
2925 | else if (ch == 'r') | |
2926 | { | |
2927 | if (match_string_p ("insic")) | |
2928 | { | |
2929 | /* Matched "intrinsic". */ | |
2930 | d = DECL_INTRINSIC; | |
2931 | } | |
2932 | } | |
2933 | } | |
2934 | break; | |
2935 | ||
2936 | case 'o': | |
2937 | if (match_string_p ("optional")) | |
2938 | d = DECL_OPTIONAL; | |
2939 | break; | |
2940 | ||
2941 | case 'p': | |
8fc541d3 FXC |
2942 | gfc_next_ascii_char (); |
2943 | switch (gfc_next_ascii_char ()) | |
f2449db4 RS |
2944 | { |
2945 | case 'a': | |
2946 | if (match_string_p ("rameter")) | |
2947 | { | |
2948 | /* Matched "parameter". */ | |
2949 | d = DECL_PARAMETER; | |
2950 | } | |
2951 | break; | |
2952 | ||
2953 | case 'o': | |
2954 | if (match_string_p ("inter")) | |
2955 | { | |
2956 | /* Matched "pointer". */ | |
2957 | d = DECL_POINTER; | |
2958 | } | |
2959 | break; | |
2960 | ||
2961 | case 'r': | |
8fc541d3 | 2962 | ch = gfc_next_ascii_char (); |
f2449db4 RS |
2963 | if (ch == 'i') |
2964 | { | |
2965 | if (match_string_p ("vate")) | |
2966 | { | |
2967 | /* Matched "private". */ | |
2968 | d = DECL_PRIVATE; | |
2969 | } | |
2970 | } | |
2971 | else if (ch == 'o') | |
2972 | { | |
2973 | if (match_string_p ("tected")) | |
2974 | { | |
2975 | /* Matched "protected". */ | |
2976 | d = DECL_PROTECTED; | |
2977 | } | |
2978 | } | |
2979 | break; | |
2980 | ||
2981 | case 'u': | |
2982 | if (match_string_p ("blic")) | |
2983 | { | |
2984 | /* Matched "public". */ | |
2985 | d = DECL_PUBLIC; | |
2986 | } | |
2987 | break; | |
2988 | } | |
2989 | break; | |
2990 | ||
2991 | case 's': | |
2992 | if (match_string_p ("save")) | |
2993 | d = DECL_SAVE; | |
2994 | break; | |
2995 | ||
2996 | case 't': | |
2997 | if (match_string_p ("target")) | |
2998 | d = DECL_TARGET; | |
2999 | break; | |
3000 | ||
3001 | case 'v': | |
8fc541d3 FXC |
3002 | gfc_next_ascii_char (); |
3003 | ch = gfc_next_ascii_char (); | |
f2449db4 RS |
3004 | if (ch == 'a') |
3005 | { | |
3006 | if (match_string_p ("lue")) | |
3007 | { | |
3008 | /* Matched "value". */ | |
3009 | d = DECL_VALUE; | |
3010 | } | |
3011 | } | |
3012 | else if (ch == 'o') | |
3013 | { | |
3014 | if (match_string_p ("latile")) | |
3015 | { | |
3016 | /* Matched "volatile". */ | |
3017 | d = DECL_VOLATILE; | |
3018 | } | |
3019 | } | |
3020 | break; | |
a8b3b0b6 CR |
3021 | } |
3022 | } | |
d468bcdb | 3023 | |
f2449db4 RS |
3024 | /* No double colon and no recognizable decl_type, so assume that |
3025 | we've been looking at something else the whole time. */ | |
3026 | if (d == DECL_NONE) | |
3027 | { | |
3028 | m = MATCH_NO; | |
3029 | goto cleanup; | |
3030 | } | |
d51347f9 | 3031 | |
acb388a0 JD |
3032 | /* Check to make sure any parens are paired up correctly. */ |
3033 | if (gfc_match_parens () == MATCH_ERROR) | |
3034 | { | |
3035 | m = MATCH_ERROR; | |
3036 | goto cleanup; | |
3037 | } | |
3038 | ||
6de9cd9a | 3039 | seen[d]++; |
63645982 | 3040 | seen_at[d] = gfc_current_locus; |
6de9cd9a DN |
3041 | |
3042 | if (d == DECL_DIMENSION) | |
3043 | { | |
3044 | m = gfc_match_array_spec (¤t_as); | |
3045 | ||
3046 | if (m == MATCH_NO) | |
3047 | { | |
3048 | gfc_error ("Missing dimension specification at %C"); | |
3049 | m = MATCH_ERROR; | |
3050 | } | |
3051 | ||
3052 | if (m == MATCH_ERROR) | |
3053 | goto cleanup; | |
3054 | } | |
3055 | } | |
3056 | ||
6de9cd9a DN |
3057 | /* Since we've seen a double colon, we have to be looking at an |
3058 | attr-spec. This means that we can now issue errors. */ | |
3059 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3060 | if (seen[d] > 1) | |
3061 | { | |
3062 | switch (d) | |
3063 | { | |
3064 | case DECL_ALLOCATABLE: | |
3065 | attr = "ALLOCATABLE"; | |
3066 | break; | |
1eee5628 TB |
3067 | case DECL_ASYNCHRONOUS: |
3068 | attr = "ASYNCHRONOUS"; | |
3069 | break; | |
6de9cd9a DN |
3070 | case DECL_DIMENSION: |
3071 | attr = "DIMENSION"; | |
3072 | break; | |
3073 | case DECL_EXTERNAL: | |
3074 | attr = "EXTERNAL"; | |
3075 | break; | |
3076 | case DECL_IN: | |
3077 | attr = "INTENT (IN)"; | |
3078 | break; | |
3079 | case DECL_OUT: | |
3080 | attr = "INTENT (OUT)"; | |
3081 | break; | |
3082 | case DECL_INOUT: | |
3083 | attr = "INTENT (IN OUT)"; | |
3084 | break; | |
3085 | case DECL_INTRINSIC: | |
3086 | attr = "INTRINSIC"; | |
3087 | break; | |
3088 | case DECL_OPTIONAL: | |
3089 | attr = "OPTIONAL"; | |
3090 | break; | |
3091 | case DECL_PARAMETER: | |
3092 | attr = "PARAMETER"; | |
3093 | break; | |
3094 | case DECL_POINTER: | |
3095 | attr = "POINTER"; | |
3096 | break; | |
ee7e677f TB |
3097 | case DECL_PROTECTED: |
3098 | attr = "PROTECTED"; | |
3099 | break; | |
6de9cd9a DN |
3100 | case DECL_PRIVATE: |
3101 | attr = "PRIVATE"; | |
3102 | break; | |
3103 | case DECL_PUBLIC: | |
3104 | attr = "PUBLIC"; | |
3105 | break; | |
3106 | case DECL_SAVE: | |
3107 | attr = "SAVE"; | |
3108 | break; | |
3109 | case DECL_TARGET: | |
3110 | attr = "TARGET"; | |
3111 | break; | |
a8b3b0b6 CR |
3112 | case DECL_IS_BIND_C: |
3113 | attr = "IS_BIND_C"; | |
3114 | break; | |
3115 | case DECL_VALUE: | |
3116 | attr = "VALUE"; | |
3117 | break; | |
775e6c3a TB |
3118 | case DECL_VOLATILE: |
3119 | attr = "VOLATILE"; | |
3120 | break; | |
6de9cd9a | 3121 | default: |
66e4ab31 | 3122 | attr = NULL; /* This shouldn't happen. */ |
6de9cd9a DN |
3123 | } |
3124 | ||
3125 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
3126 | m = MATCH_ERROR; | |
3127 | goto cleanup; | |
3128 | } | |
3129 | ||
3130 | /* Now that we've dealt with duplicate attributes, add the attributes | |
3131 | to the current attribute. */ | |
3132 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3133 | { | |
3134 | if (seen[d] == 0) | |
3135 | continue; | |
3136 | ||
3137 | if (gfc_current_state () == COMP_DERIVED | |
3138 | && d != DECL_DIMENSION && d != DECL_POINTER | |
f2449db4 RS |
3139 | && d != DECL_PRIVATE && d != DECL_PUBLIC |
3140 | && d != DECL_NONE) | |
6de9cd9a | 3141 | { |
5046aff5 PT |
3142 | if (d == DECL_ALLOCATABLE) |
3143 | { | |
636dff67 SK |
3144 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
3145 | "attribute at %C in a TYPE definition") | |
d51347f9 | 3146 | == FAILURE) |
5046aff5 PT |
3147 | { |
3148 | m = MATCH_ERROR; | |
3149 | goto cleanup; | |
3150 | } | |
636dff67 SK |
3151 | } |
3152 | else | |
5046aff5 PT |
3153 | { |
3154 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
d51347f9 | 3155 | &seen_at[d]); |
5046aff5 PT |
3156 | m = MATCH_ERROR; |
3157 | goto cleanup; | |
3158 | } | |
6de9cd9a DN |
3159 | } |
3160 | ||
4213f93b | 3161 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
636dff67 | 3162 | && gfc_current_state () != COMP_MODULE) |
4213f93b PT |
3163 | { |
3164 | if (d == DECL_PRIVATE) | |
3165 | attr = "PRIVATE"; | |
3166 | else | |
3167 | attr = "PUBLIC"; | |
d51347f9 TB |
3168 | if (gfc_current_state () == COMP_DERIVED |
3169 | && gfc_state_stack->previous | |
3170 | && gfc_state_stack->previous->state == COMP_MODULE) | |
3171 | { | |
3172 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s " | |
3173 | "at %L in a TYPE definition", attr, | |
3174 | &seen_at[d]) | |
3175 | == FAILURE) | |
3176 | { | |
3177 | m = MATCH_ERROR; | |
3178 | goto cleanup; | |
3179 | } | |
3180 | } | |
3181 | else | |
3182 | { | |
3183 | gfc_error ("%s attribute at %L is not allowed outside of the " | |
3184 | "specification part of a module", attr, &seen_at[d]); | |
3185 | m = MATCH_ERROR; | |
3186 | goto cleanup; | |
3187 | } | |
4213f93b PT |
3188 | } |
3189 | ||
6de9cd9a DN |
3190 | switch (d) |
3191 | { | |
3192 | case DECL_ALLOCATABLE: | |
3193 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
3194 | break; | |
3195 | ||
1eee5628 TB |
3196 | case DECL_ASYNCHRONOUS: |
3197 | if (gfc_notify_std (GFC_STD_F2003, | |
3198 | "Fortran 2003: ASYNCHRONOUS attribute at %C") | |
3199 | == FAILURE) | |
3200 | t = FAILURE; | |
3201 | else | |
3202 | t = gfc_add_asynchronous (¤t_attr, NULL, &seen_at[d]); | |
3203 | break; | |
3204 | ||
6de9cd9a | 3205 | case DECL_DIMENSION: |
231b2fcc | 3206 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
3207 | break; |
3208 | ||
3209 | case DECL_EXTERNAL: | |
3210 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
3211 | break; | |
3212 | ||
3213 | case DECL_IN: | |
3214 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
3215 | break; | |
3216 | ||
3217 | case DECL_OUT: | |
3218 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
3219 | break; | |
3220 | ||
3221 | case DECL_INOUT: | |
3222 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
3223 | break; | |
3224 | ||
3225 | case DECL_INTRINSIC: | |
3226 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
3227 | break; | |
3228 | ||
3229 | case DECL_OPTIONAL: | |
3230 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
3231 | break; | |
3232 | ||
3233 | case DECL_PARAMETER: | |
231b2fcc | 3234 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
6de9cd9a DN |
3235 | break; |
3236 | ||
3237 | case DECL_POINTER: | |
3238 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
3239 | break; | |
3240 | ||
ee7e677f TB |
3241 | case DECL_PROTECTED: |
3242 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
3243 | { | |
3244 | gfc_error ("PROTECTED at %C only allowed in specification " | |
3245 | "part of a module"); | |
3246 | t = FAILURE; | |
3247 | break; | |
3248 | } | |
3249 | ||
636dff67 SK |
3250 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
3251 | "attribute at %C") | |
ee7e677f TB |
3252 | == FAILURE) |
3253 | t = FAILURE; | |
3254 | else | |
3255 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
3256 | break; | |
3257 | ||
6de9cd9a | 3258 | case DECL_PRIVATE: |
231b2fcc TS |
3259 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
3260 | &seen_at[d]); | |
6de9cd9a DN |
3261 | break; |
3262 | ||
3263 | case DECL_PUBLIC: | |
231b2fcc TS |
3264 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
3265 | &seen_at[d]); | |
6de9cd9a DN |
3266 | break; |
3267 | ||
3268 | case DECL_SAVE: | |
231b2fcc | 3269 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
3270 | break; |
3271 | ||
3272 | case DECL_TARGET: | |
3273 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
3274 | break; | |
3275 | ||
a8b3b0b6 CR |
3276 | case DECL_IS_BIND_C: |
3277 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); | |
3278 | break; | |
3279 | ||
06469efd | 3280 | case DECL_VALUE: |
636dff67 SK |
3281 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
3282 | "at %C") | |
06469efd PT |
3283 | == FAILURE) |
3284 | t = FAILURE; | |
3285 | else | |
3286 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
3287 | break; | |
3288 | ||
775e6c3a TB |
3289 | case DECL_VOLATILE: |
3290 | if (gfc_notify_std (GFC_STD_F2003, | |
636dff67 | 3291 | "Fortran 2003: VOLATILE attribute at %C") |
775e6c3a TB |
3292 | == FAILURE) |
3293 | t = FAILURE; | |
3294 | else | |
3295 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
3296 | break; | |
3297 | ||
6de9cd9a DN |
3298 | default: |
3299 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
3300 | } | |
3301 | ||
3302 | if (t == FAILURE) | |
3303 | { | |
3304 | m = MATCH_ERROR; | |
3305 | goto cleanup; | |
3306 | } | |
3307 | } | |
3308 | ||
3309 | colon_seen = 1; | |
3310 | return MATCH_YES; | |
3311 | ||
3312 | cleanup: | |
63645982 | 3313 | gfc_current_locus = start; |
6de9cd9a DN |
3314 | gfc_free_array_spec (current_as); |
3315 | current_as = NULL; | |
3316 | return m; | |
3317 | } | |
3318 | ||
3319 | ||
a8b3b0b6 CR |
3320 | /* Set the binding label, dest_label, either with the binding label |
3321 | stored in the given gfc_typespec, ts, or if none was provided, it | |
3322 | will be the symbol name in all lower case, as required by the draft | |
3323 | (J3/04-007, section 15.4.1). If a binding label was given and | |
3324 | there is more than one argument (num_idents), it is an error. */ | |
3325 | ||
17b1d2a0 | 3326 | gfc_try |
a8b3b0b6 CR |
3327 | set_binding_label (char *dest_label, const char *sym_name, int num_idents) |
3328 | { | |
ad4a2f64 | 3329 | if (num_idents > 1 && has_name_equals) |
a8b3b0b6 | 3330 | { |
ad4a2f64 TB |
3331 | gfc_error ("Multiple identifiers provided with " |
3332 | "single NAME= specifier at %C"); | |
3333 | return FAILURE; | |
3334 | } | |
a8b3b0b6 | 3335 | |
ad4a2f64 TB |
3336 | if (curr_binding_label[0] != '\0') |
3337 | { | |
a8b3b0b6 | 3338 | /* Binding label given; store in temp holder til have sym. */ |
c5b5a17a | 3339 | strcpy (dest_label, curr_binding_label); |
a8b3b0b6 CR |
3340 | } |
3341 | else | |
3342 | { | |
3343 | /* No binding label given, and the NAME= specifier did not exist, | |
3344 | which means there was no NAME="". */ | |
3345 | if (sym_name != NULL && has_name_equals == 0) | |
c5b5a17a | 3346 | strcpy (dest_label, sym_name); |
a8b3b0b6 CR |
3347 | } |
3348 | ||
3349 | return SUCCESS; | |
3350 | } | |
3351 | ||
3352 | ||
3353 | /* Set the status of the given common block as being BIND(C) or not, | |
3354 | depending on the given parameter, is_bind_c. */ | |
3355 | ||
3356 | void | |
3357 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) | |
3358 | { | |
3359 | com_block->is_bind_c = is_bind_c; | |
3360 | return; | |
3361 | } | |
3362 | ||
3363 | ||
3364 | /* Verify that the given gfc_typespec is for a C interoperable type. */ | |
3365 | ||
17b1d2a0 | 3366 | gfc_try |
2ec855f1 | 3367 | verify_c_interop (gfc_typespec *ts) |
a8b3b0b6 | 3368 | { |
bc21d315 JW |
3369 | if (ts->type == BT_DERIVED && ts->u.derived != NULL) |
3370 | return (ts->u.derived->ts.is_c_interop ? SUCCESS : FAILURE); | |
a8b3b0b6 CR |
3371 | else if (ts->is_c_interop != 1) |
3372 | return FAILURE; | |
3373 | ||
3374 | return SUCCESS; | |
3375 | } | |
3376 | ||
3377 | ||
3378 | /* Verify that the variables of a given common block, which has been | |
3379 | defined with the attribute specifier bind(c), to be of a C | |
3380 | interoperable type. Errors will be reported here, if | |
3381 | encountered. */ | |
3382 | ||
17b1d2a0 | 3383 | gfc_try |
a8b3b0b6 CR |
3384 | verify_com_block_vars_c_interop (gfc_common_head *com_block) |
3385 | { | |
3386 | gfc_symbol *curr_sym = NULL; | |
17b1d2a0 | 3387 | gfc_try retval = SUCCESS; |
a8b3b0b6 CR |
3388 | |
3389 | curr_sym = com_block->head; | |
3390 | ||
3391 | /* Make sure we have at least one symbol. */ | |
3392 | if (curr_sym == NULL) | |
3393 | return retval; | |
3394 | ||
3395 | /* Here we know we have a symbol, so we'll execute this loop | |
3396 | at least once. */ | |
3397 | do | |
3398 | { | |
3399 | /* The second to last param, 1, says this is in a common block. */ | |
3400 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); | |
3401 | curr_sym = curr_sym->common_next; | |
3402 | } while (curr_sym != NULL); | |
3403 | ||
3404 | return retval; | |
3405 | } | |
3406 | ||
3407 | ||
3408 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, | |
3409 | an appropriate error message is reported. */ | |
3410 | ||
17b1d2a0 | 3411 | gfc_try |
a8b3b0b6 CR |
3412 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, |
3413 | int is_in_common, gfc_common_head *com_block) | |
3414 | { | |
8327f9c2 | 3415 | bool bind_c_function = false; |
17b1d2a0 | 3416 | gfc_try retval = SUCCESS; |
d8fa96e0 | 3417 | |
8327f9c2 TB |
3418 | if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c) |
3419 | bind_c_function = true; | |
3420 | ||
d8fa96e0 CR |
3421 | if (tmp_sym->attr.function && tmp_sym->result != NULL) |
3422 | { | |
3423 | tmp_sym = tmp_sym->result; | |
3424 | /* Make sure it wasn't an implicitly typed result. */ | |
3425 | if (tmp_sym->attr.implicit_type) | |
3426 | { | |
3427 | gfc_warning ("Implicitly declared BIND(C) function '%s' at " | |
3428 | "%L may not be C interoperable", tmp_sym->name, | |
3429 | &tmp_sym->declared_at); | |
3430 | tmp_sym->ts.f90_type = tmp_sym->ts.type; | |
3431 | /* Mark it as C interoperable to prevent duplicate warnings. */ | |
3432 | tmp_sym->ts.is_c_interop = 1; | |
3433 | tmp_sym->attr.is_c_interop = 1; | |
3434 | } | |
3435 | } | |
8327f9c2 | 3436 | |
a8b3b0b6 CR |
3437 | /* Here, we know we have the bind(c) attribute, so if we have |
3438 | enough type info, then verify that it's a C interop kind. | |
3439 | The info could be in the symbol already, or possibly still in | |
3440 | the given ts (current_ts), so look in both. */ | |
3441 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) | |
3442 | { | |
2ec855f1 | 3443 | if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS) |
a8b3b0b6 CR |
3444 | { |
3445 | /* See if we're dealing with a sym in a common block or not. */ | |
3446 | if (is_in_common == 1) | |
3447 | { | |
3448 | gfc_warning ("Variable '%s' in common block '%s' at %L " | |
3449 | "may not be a C interoperable " | |
3450 | "kind though common block '%s' is BIND(C)", | |
3451 | tmp_sym->name, com_block->name, | |
3452 | &(tmp_sym->declared_at), com_block->name); | |
3453 | } | |
3454 | else | |
3455 | { | |
3456 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) | |
3457 | gfc_error ("Type declaration '%s' at %L is not C " | |
3458 | "interoperable but it is BIND(C)", | |
3459 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3460 | else | |
3461 | gfc_warning ("Variable '%s' at %L " | |
3462 | "may not be a C interoperable " | |
3463 | "kind but it is bind(c)", | |
3464 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3465 | } | |
3466 | } | |
3467 | ||
3468 | /* Variables declared w/in a common block can't be bind(c) | |
3469 | since there's no way for C to see these variables, so there's | |
3470 | semantically no reason for the attribute. */ | |
3471 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) | |
3472 | { | |
3473 | gfc_error ("Variable '%s' in common block '%s' at " | |
3474 | "%L cannot be declared with BIND(C) " | |
3475 | "since it is not a global", | |
3476 | tmp_sym->name, com_block->name, | |
3477 | &(tmp_sym->declared_at)); | |
3478 | retval = FAILURE; | |
3479 | } | |
3480 | ||
3481 | /* Scalar variables that are bind(c) can not have the pointer | |
3482 | or allocatable attributes. */ | |
3483 | if (tmp_sym->attr.is_bind_c == 1) | |
3484 | { | |
3485 | if (tmp_sym->attr.pointer == 1) | |
3486 | { | |
3487 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3488 | "POINTER and BIND(C) attributes", | |
3489 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3490 | retval = FAILURE; | |
3491 | } | |
3492 | ||
3493 | if (tmp_sym->attr.allocatable == 1) | |
3494 | { | |
3495 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3496 | "ALLOCATABLE and BIND(C) attributes", | |
3497 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3498 | retval = FAILURE; | |
3499 | } | |
3500 | ||
8327f9c2 TB |
3501 | } |
3502 | ||
3503 | /* If it is a BIND(C) function, make sure the return value is a | |
3504 | scalar value. The previous tests in this function made sure | |
3505 | the type is interoperable. */ | |
3506 | if (bind_c_function && tmp_sym->as != NULL) | |
3507 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3508 | "be an array", tmp_sym->name, &(tmp_sym->declared_at)); | |
3509 | ||
3510 | /* BIND(C) functions can not return a character string. */ | |
3511 | if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER) | |
bc21d315 JW |
3512 | if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL |
3513 | || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT | |
3514 | || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0) | |
8327f9c2 | 3515 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " |
a8b3b0b6 CR |
3516 | "be a character string", tmp_sym->name, |
3517 | &(tmp_sym->declared_at)); | |
a8b3b0b6 CR |
3518 | } |
3519 | ||
3520 | /* See if the symbol has been marked as private. If it has, make sure | |
3521 | there is no binding label and warn the user if there is one. */ | |
3522 | if (tmp_sym->attr.access == ACCESS_PRIVATE | |
3523 | && tmp_sym->binding_label[0] != '\0') | |
3524 | /* Use gfc_warning_now because we won't say that the symbol fails | |
3525 | just because of this. */ | |
3526 | gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " | |
3527 | "given the binding label '%s'", tmp_sym->name, | |
3528 | &(tmp_sym->declared_at), tmp_sym->binding_label); | |
3529 | ||
3530 | return retval; | |
3531 | } | |
3532 | ||
3533 | ||
3534 | /* Set the appropriate fields for a symbol that's been declared as | |
3535 | BIND(C) (the is_bind_c flag and the binding label), and verify that | |
3536 | the type is C interoperable. Errors are reported by the functions | |
3537 | used to set/test these fields. */ | |
3538 | ||
17b1d2a0 | 3539 | gfc_try |
a8b3b0b6 CR |
3540 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) |
3541 | { | |
17b1d2a0 | 3542 | gfc_try retval = SUCCESS; |
a8b3b0b6 CR |
3543 | |
3544 | /* TODO: Do we need to make sure the vars aren't marked private? */ | |
3545 | ||
3546 | /* Set the is_bind_c bit in symbol_attribute. */ | |
3547 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); | |
3548 | ||
3549 | if (set_binding_label (tmp_sym->binding_label, tmp_sym->name, | |
3550 | num_idents) != SUCCESS) | |
3551 | return FAILURE; | |
3552 | ||
3553 | return retval; | |
3554 | } | |
3555 | ||
3556 | ||
3557 | /* Set the fields marking the given common block as BIND(C), including | |
3558 | a binding label, and report any errors encountered. */ | |
3559 | ||
17b1d2a0 | 3560 | gfc_try |
a8b3b0b6 CR |
3561 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) |
3562 | { | |
17b1d2a0 | 3563 | gfc_try retval = SUCCESS; |
a8b3b0b6 CR |
3564 | |
3565 | /* destLabel, common name, typespec (which may have binding label). */ | |
3566 | if (set_binding_label (com_block->binding_label, com_block->name, num_idents) | |
3567 | != SUCCESS) | |
3568 | return FAILURE; | |
3569 | ||
3570 | /* Set the given common block (com_block) to being bind(c) (1). */ | |
3571 | set_com_block_bind_c (com_block, 1); | |
3572 | ||
3573 | return retval; | |
3574 | } | |
3575 | ||
3576 | ||
3577 | /* Retrieve the list of one or more identifiers that the given bind(c) | |
3578 | attribute applies to. */ | |
3579 | ||
17b1d2a0 | 3580 | gfc_try |
a8b3b0b6 CR |
3581 | get_bind_c_idents (void) |
3582 | { | |
3583 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3584 | int num_idents = 0; | |
3585 | gfc_symbol *tmp_sym = NULL; | |
3586 | match found_id; | |
3587 | gfc_common_head *com_block = NULL; | |
3588 | ||
3589 | if (gfc_match_name (name) == MATCH_YES) | |
3590 | { | |
3591 | found_id = MATCH_YES; | |
3592 | gfc_get_ha_symbol (name, &tmp_sym); | |
3593 | } | |
3594 | else if (match_common_name (name) == MATCH_YES) | |
3595 | { | |
3596 | found_id = MATCH_YES; | |
3597 | com_block = gfc_get_common (name, 0); | |
3598 | } | |
3599 | else | |
3600 | { | |
3601 | gfc_error ("Need either entity or common block name for " | |
3602 | "attribute specification statement at %C"); | |
3603 | return FAILURE; | |
3604 | } | |
3605 | ||
3606 | /* Save the current identifier and look for more. */ | |
3607 | do | |
3608 | { | |
3609 | /* Increment the number of identifiers found for this spec stmt. */ | |
3610 | num_idents++; | |
3611 | ||
3612 | /* Make sure we have a sym or com block, and verify that it can | |
3613 | be bind(c). Set the appropriate field(s) and look for more | |
3614 | identifiers. */ | |
3615 | if (tmp_sym != NULL || com_block != NULL) | |
3616 | { | |
3617 | if (tmp_sym != NULL) | |
3618 | { | |
3619 | if (set_verify_bind_c_sym (tmp_sym, num_idents) | |
3620 | != SUCCESS) | |
3621 | return FAILURE; | |
3622 | } | |
3623 | else | |
3624 | { | |
3625 | if (set_verify_bind_c_com_block(com_block, num_idents) | |
3626 | != SUCCESS) | |
3627 | return FAILURE; | |
3628 | } | |
3629 | ||
3630 | /* Look to see if we have another identifier. */ | |
3631 | tmp_sym = NULL; | |
3632 | if (gfc_match_eos () == MATCH_YES) | |
3633 | found_id = MATCH_NO; | |
3634 | else if (gfc_match_char (',') != MATCH_YES) | |
3635 | found_id = MATCH_NO; | |
3636 | else if (gfc_match_name (name) == MATCH_YES) | |
3637 | { | |
3638 | found_id = MATCH_YES; | |
3639 | gfc_get_ha_symbol (name, &tmp_sym); | |
3640 | } | |
3641 | else if (match_common_name (name) == MATCH_YES) | |
3642 | { | |
3643 | found_id = MATCH_YES; | |
3644 | com_block = gfc_get_common (name, 0); | |
3645 | } | |
3646 | else | |
3647 | { | |
3648 | gfc_error ("Missing entity or common block name for " | |
3649 | "attribute specification statement at %C"); | |
3650 | return FAILURE; | |
3651 | } | |
3652 | } | |
3653 | else | |
3654 | { | |
3655 | gfc_internal_error ("Missing symbol"); | |
3656 | } | |
3657 | } while (found_id == MATCH_YES); | |
3658 | ||
3659 | /* if we get here we were successful */ | |
3660 | return SUCCESS; | |
3661 | } | |
3662 | ||
3663 | ||
3664 | /* Try and match a BIND(C) attribute specification statement. */ | |
3665 | ||
3666 | match | |
3667 | gfc_match_bind_c_stmt (void) | |
3668 | { | |
3669 | match found_match = MATCH_NO; | |
3670 | gfc_typespec *ts; | |
3671 | ||
3672 | ts = ¤t_ts; | |
3673 | ||
3674 | /* This may not be necessary. */ | |
3675 | gfc_clear_ts (ts); | |
3676 | /* Clear the temporary binding label holder. */ | |
3677 | curr_binding_label[0] = '\0'; | |
3678 | ||
3679 | /* Look for the bind(c). */ | |
1eabf70a | 3680 | found_match = gfc_match_bind_c (NULL, true); |
a8b3b0b6 CR |
3681 | |
3682 | if (found_match == MATCH_YES) | |
3683 | { | |
3684 | /* Look for the :: now, but it is not required. */ | |
3685 | gfc_match (" :: "); | |
3686 | ||
3687 | /* Get the identifier(s) that needs to be updated. This may need to | |
3688 | change to hand the flag(s) for the attr specified so all identifiers | |
3689 | found can have all appropriate parts updated (assuming that the same | |
3690 | spec stmt can have multiple attrs, such as both bind(c) and | |
3691 | allocatable...). */ | |
3692 | if (get_bind_c_idents () != SUCCESS) | |
3693 | /* Error message should have printed already. */ | |
3694 | return MATCH_ERROR; | |
3695 | } | |
3696 | ||
3697 | return found_match; | |
3698 | } | |
3699 | ||
3700 | ||
6de9cd9a DN |
3701 | /* Match a data declaration statement. */ |
3702 | ||
3703 | match | |
3704 | gfc_match_data_decl (void) | |
3705 | { | |
3706 | gfc_symbol *sym; | |
3707 | match m; | |
949d5b72 | 3708 | int elem; |
6de9cd9a | 3709 | |
a8b3b0b6 CR |
3710 | num_idents_on_line = 0; |
3711 | ||
e74f1cc8 | 3712 | m = gfc_match_decl_type_spec (¤t_ts, 0); |
6de9cd9a DN |
3713 | if (m != MATCH_YES) |
3714 | return m; | |
3715 | ||
2e23972e JW |
3716 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
3717 | && gfc_current_state () != COMP_DERIVED) | |
6de9cd9a | 3718 | { |
bc21d315 | 3719 | sym = gfc_use_derived (current_ts.u.derived); |
6de9cd9a DN |
3720 | |
3721 | if (sym == NULL) | |
3722 | { | |
3723 | m = MATCH_ERROR; | |
3724 | goto cleanup; | |
3725 | } | |
3726 | ||
bc21d315 | 3727 | current_ts.u.derived = sym; |
6de9cd9a DN |
3728 | } |
3729 | ||
3730 | m = match_attr_spec (); | |
3731 | if (m == MATCH_ERROR) | |
3732 | { | |
3733 | m = MATCH_NO; | |
3734 | goto cleanup; | |
3735 | } | |
3736 | ||
2e23972e JW |
3737 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
3738 | && current_ts.u.derived->components == NULL | |
bc21d315 | 3739 | && !current_ts.u.derived->attr.zero_comp) |
6de9cd9a DN |
3740 | { |
3741 | ||
3742 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
3743 | goto ok; | |
3744 | ||
bc21d315 JW |
3745 | gfc_find_symbol (current_ts.u.derived->name, |
3746 | current_ts.u.derived->ns->parent, 1, &sym); | |
6de9cd9a | 3747 | |
976e21f6 | 3748 | /* Any symbol that we find had better be a type definition |
636dff67 | 3749 | which has its components defined. */ |
976e21f6 | 3750 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
bc21d315 JW |
3751 | && (current_ts.u.derived->components != NULL |
3752 | || current_ts.u.derived->attr.zero_comp)) | |
6de9cd9a DN |
3753 | goto ok; |
3754 | ||
976e21f6 PT |
3755 | /* Now we have an error, which we signal, and then fix up |
3756 | because the knock-on is plain and simple confusing. */ | |
3757 | gfc_error_now ("Derived type at %C has not been previously defined " | |
636dff67 | 3758 | "and so cannot appear in a derived type definition"); |
976e21f6 PT |
3759 | current_attr.pointer = 1; |
3760 | goto ok; | |
6de9cd9a DN |
3761 | } |
3762 | ||
3763 | ok: | |
3764 | /* If we have an old-style character declaration, and no new-style | |
3765 | attribute specifications, then there a comma is optional between | |
3766 | the type specification and the variable list. */ | |
3767 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
3768 | gfc_match_char (','); | |
3769 | ||
949d5b72 PT |
3770 | /* Give the types/attributes to symbols that follow. Give the element |
3771 | a number so that repeat character length expressions can be copied. */ | |
3772 | elem = 1; | |
6de9cd9a DN |
3773 | for (;;) |
3774 | { | |
a8b3b0b6 | 3775 | num_idents_on_line++; |
949d5b72 | 3776 | m = variable_decl (elem++); |
6de9cd9a DN |
3777 | if (m == MATCH_ERROR) |
3778 | goto cleanup; | |
3779 | if (m == MATCH_NO) | |
3780 | break; | |
3781 | ||
3782 | if (gfc_match_eos () == MATCH_YES) | |
3783 | goto cleanup; | |
3784 | if (gfc_match_char (',') != MATCH_YES) | |
3785 | break; | |
3786 | } | |
3787 | ||
8f81c3c6 PT |
3788 | if (gfc_error_flag_test () == 0) |
3789 | gfc_error ("Syntax error in data declaration at %C"); | |
6de9cd9a DN |
3790 | m = MATCH_ERROR; |
3791 | ||
a9f6f1f2 JD |
3792 | gfc_free_data_all (gfc_current_ns); |
3793 | ||
6de9cd9a DN |
3794 | cleanup: |
3795 | gfc_free_array_spec (current_as); | |
3796 | current_as = NULL; | |
3797 | return m; | |
3798 | } | |
3799 | ||
3800 | ||
3801 | /* Match a prefix associated with a function or subroutine | |
3802 | declaration. If the typespec pointer is nonnull, then a typespec | |
3803 | can be matched. Note that if nothing matches, MATCH_YES is | |
3804 | returned (the null string was matched). */ | |
3805 | ||
1c8bcdf7 PT |
3806 | match |
3807 | gfc_match_prefix (gfc_typespec *ts) | |
6de9cd9a | 3808 | { |
7389bce6 | 3809 | bool seen_type; |
6de9cd9a DN |
3810 | |
3811 | gfc_clear_attr (¤t_attr); | |
3812 | seen_type = 0; | |
3813 | ||
3df684e2 DK |
3814 | gcc_assert (!gfc_matching_prefix); |
3815 | gfc_matching_prefix = true; | |
f37e928c | 3816 | |
6de9cd9a DN |
3817 | loop: |
3818 | if (!seen_type && ts != NULL | |
e74f1cc8 | 3819 | && gfc_match_decl_type_spec (ts, 0) == MATCH_YES |
6de9cd9a DN |
3820 | && gfc_match_space () == MATCH_YES) |
3821 | { | |
3822 | ||
3823 | seen_type = 1; | |
3824 | goto loop; | |
3825 | } | |
3826 | ||
3827 | if (gfc_match ("elemental% ") == MATCH_YES) | |
3828 | { | |
3829 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
f37e928c | 3830 | goto error; |
6de9cd9a DN |
3831 | |
3832 | goto loop; | |
3833 | } | |
3834 | ||
3835 | if (gfc_match ("pure% ") == MATCH_YES) | |
3836 | { | |
3837 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
f37e928c | 3838 | goto error; |
6de9cd9a DN |
3839 | |
3840 | goto loop; | |
3841 | } | |
3842 | ||
3843 | if (gfc_match ("recursive% ") == MATCH_YES) | |
3844 | { | |
3845 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
f37e928c | 3846 | goto error; |
6de9cd9a DN |
3847 | |
3848 | goto loop; | |
3849 | } | |
3850 | ||
3851 | /* At this point, the next item is not a prefix. */ | |
3df684e2 DK |
3852 | gcc_assert (gfc_matching_prefix); |
3853 | gfc_matching_prefix = false; | |
6de9cd9a | 3854 | return MATCH_YES; |
f37e928c DK |
3855 | |
3856 | error: | |
3df684e2 DK |
3857 | gcc_assert (gfc_matching_prefix); |
3858 | gfc_matching_prefix = false; | |
f37e928c | 3859 | return MATCH_ERROR; |
6de9cd9a DN |
3860 | } |
3861 | ||
3862 | ||
1c8bcdf7 | 3863 | /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */ |
6de9cd9a | 3864 | |
17b1d2a0 | 3865 | static gfc_try |
636dff67 | 3866 | copy_prefix (symbol_attribute *dest, locus *where) |
6de9cd9a | 3867 | { |
6de9cd9a DN |
3868 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
3869 | return FAILURE; | |
3870 | ||
3871 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
3872 | return FAILURE; | |
3873 | ||
3874 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
3875 | return FAILURE; | |
3876 | ||
3877 | return SUCCESS; | |
3878 | } | |
3879 | ||
3880 | ||
3881 | /* Match a formal argument list. */ | |
3882 | ||
3883 | match | |
636dff67 | 3884 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
6de9cd9a DN |
3885 | { |
3886 | gfc_formal_arglist *head, *tail, *p, *q; | |
3887 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3888 | gfc_symbol *sym; | |
3889 | match m; | |
3890 | ||
3891 | head = tail = NULL; | |
3892 | ||
3893 | if (gfc_match_char ('(') != MATCH_YES) | |
3894 | { | |
3895 | if (null_flag) | |
3896 | goto ok; | |
3897 | return MATCH_NO; | |
3898 | } | |
3899 | ||
3900 | if (gfc_match_char (')') == MATCH_YES) | |
3901 | goto ok; | |
3902 | ||
3903 | for (;;) | |
3904 | { | |
3905 | if (gfc_match_char ('*') == MATCH_YES) | |
3906 | sym = NULL; | |
3907 | else | |
3908 | { | |
3909 | m = gfc_match_name (name); | |
3910 | if (m != MATCH_YES) | |
3911 | goto cleanup; | |
3912 | ||
3913 | if (gfc_get_symbol (name, NULL, &sym)) | |
3914 | goto cleanup; | |
3915 | } | |
3916 | ||
3917 | p = gfc_get_formal_arglist (); | |
3918 | ||
3919 | if (head == NULL) | |
3920 | head = tail = p; | |
3921 | else | |
3922 | { | |
3923 | tail->next = p; | |
3924 | tail = p; | |
3925 | } | |
3926 | ||
3927 | tail->sym = sym; | |
3928 | ||
3929 | /* We don't add the VARIABLE flavor because the name could be a | |
636dff67 SK |
3930 | dummy procedure. We don't apply these attributes to formal |
3931 | arguments of statement functions. */ | |
6de9cd9a | 3932 | if (sym != NULL && !st_flag |
231b2fcc | 3933 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
6de9cd9a DN |
3934 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
3935 | { | |
3936 | m = MATCH_ERROR; | |
3937 | goto cleanup; | |
3938 | } | |
3939 | ||
3940 | /* The name of a program unit can be in a different namespace, | |
636dff67 SK |
3941 | so check for it explicitly. After the statement is accepted, |
3942 | the name is checked for especially in gfc_get_symbol(). */ | |
6de9cd9a DN |
3943 | if (gfc_new_block != NULL && sym != NULL |
3944 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
3945 | { | |
3946 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
3947 | sym->name); | |
3948 | m = MATCH_ERROR; | |
3949 | goto cleanup; | |
3950 | } | |
3951 | ||
3952 | if (gfc_match_char (')') == MATCH_YES) | |
3953 | goto ok; | |
3954 | ||
3955 | m = gfc_match_char (','); | |
3956 | if (m != MATCH_YES) | |
3957 | { | |
3958 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
3959 | goto cleanup; | |
3960 | } | |
3961 | } | |
3962 | ||
3963 | ok: | |
3964 | /* Check for duplicate symbols in the formal argument list. */ | |
3965 | if (head != NULL) | |
3966 | { | |
3967 | for (p = head; p->next; p = p->next) | |
3968 | { | |
3969 | if (p->sym == NULL) | |
3970 | continue; | |
3971 | ||
3972 | for (q = p->next; q; q = q->next) | |
3973 | if (p->sym == q->sym) | |
3974 | { | |
636dff67 SK |
3975 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
3976 | "at %C", p->sym->name); | |
6de9cd9a DN |
3977 | |
3978 | m = MATCH_ERROR; | |
3979 | goto cleanup; | |
3980 | } | |
3981 | } | |
3982 | } | |
3983 | ||
66e4ab31 SK |
3984 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) |
3985 | == FAILURE) | |
6de9cd9a DN |
3986 | { |
3987 | m = MATCH_ERROR; | |
3988 | goto cleanup; | |
3989 | } | |
3990 | ||
3991 | return MATCH_YES; | |
3992 | ||
3993 | cleanup: | |
3994 | gfc_free_formal_arglist (head); | |
3995 | return m; | |
3996 | } | |
3997 | ||
3998 | ||
3999 | /* Match a RESULT specification following a function declaration or | |
4000 | ENTRY statement. Also matches the end-of-statement. */ | |
4001 | ||
4002 | static match | |
66e4ab31 | 4003 | match_result (gfc_symbol *function, gfc_symbol **result) |
6de9cd9a DN |
4004 | { |
4005 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4006 | gfc_symbol *r; | |
4007 | match m; | |
4008 | ||
4009 | if (gfc_match (" result (") != MATCH_YES) | |
4010 | return MATCH_NO; | |
4011 | ||
4012 | m = gfc_match_name (name); | |
4013 | if (m != MATCH_YES) | |
4014 | return m; | |
4015 | ||
a8b3b0b6 CR |
4016 | /* Get the right paren, and that's it because there could be the |
4017 | bind(c) attribute after the result clause. */ | |
4018 | if (gfc_match_char(')') != MATCH_YES) | |
6de9cd9a | 4019 | { |
a8b3b0b6 | 4020 | /* TODO: should report the missing right paren here. */ |
6de9cd9a DN |
4021 | return MATCH_ERROR; |
4022 | } | |
4023 | ||
4024 | if (strcmp (function->name, name) == 0) | |
4025 | { | |
636dff67 | 4026 | gfc_error ("RESULT variable at %C must be different than function name"); |
6de9cd9a DN |
4027 | return MATCH_ERROR; |
4028 | } | |
4029 | ||
4030 | if (gfc_get_symbol (name, NULL, &r)) | |
4031 | return MATCH_ERROR; | |
4032 | ||
726d8566 | 4033 | if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE) |
6de9cd9a DN |
4034 | return MATCH_ERROR; |
4035 | ||
4036 | *result = r; | |
4037 | ||
4038 | return MATCH_YES; | |
4039 | } | |
4040 | ||
4041 | ||
a8b3b0b6 CR |
4042 | /* Match a function suffix, which could be a combination of a result |
4043 | clause and BIND(C), either one, or neither. The draft does not | |
4044 | require them to come in a specific order. */ | |
4045 | ||
4046 | match | |
4047 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) | |
4048 | { | |
4049 | match is_bind_c; /* Found bind(c). */ | |
4050 | match is_result; /* Found result clause. */ | |
4051 | match found_match; /* Status of whether we've found a good match. */ | |
8fc541d3 | 4052 | char peek_char; /* Character we're going to peek at. */ |
1eabf70a | 4053 | bool allow_binding_name; |
a8b3b0b6 CR |
4054 | |
4055 | /* Initialize to having found nothing. */ | |
4056 | found_match = MATCH_NO; | |
4057 | is_bind_c = MATCH_NO; | |
4058 | is_result = MATCH_NO; | |
4059 | ||
4060 | /* Get the next char to narrow between result and bind(c). */ | |
4061 | gfc_gobble_whitespace (); | |
8fc541d3 | 4062 | peek_char = gfc_peek_ascii_char (); |
a8b3b0b6 | 4063 | |
1eabf70a TB |
4064 | /* C binding names are not allowed for internal procedures. */ |
4065 | if (gfc_current_state () == COMP_CONTAINS | |
4066 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
4067 | allow_binding_name = false; | |
4068 | else | |
4069 | allow_binding_name = true; | |
4070 | ||
a8b3b0b6 CR |
4071 | switch (peek_char) |
4072 | { | |
4073 | case 'r': | |
4074 | /* Look for result clause. */ | |
4075 | is_result = match_result (sym, result); | |
4076 | if (is_result == MATCH_YES) | |
4077 | { | |
4078 | /* Now see if there is a bind(c) after it. */ | |
1eabf70a | 4079 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
a8b3b0b6 CR |
4080 | /* We've found the result clause and possibly bind(c). */ |
4081 | found_match = MATCH_YES; | |
4082 | } | |
4083 | else | |
4084 | /* This should only be MATCH_ERROR. */ | |
4085 | found_match = is_result; | |
4086 | break; | |
4087 | case 'b': | |
4088 | /* Look for bind(c) first. */ | |
1eabf70a | 4089 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
a8b3b0b6 CR |
4090 | if (is_bind_c == MATCH_YES) |
4091 | { | |
4092 | /* Now see if a result clause followed it. */ | |
4093 | is_result = match_result (sym, result); | |
4094 | found_match = MATCH_YES; | |
4095 | } | |
4096 | else | |
4097 | { | |
4098 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ | |
4099 | found_match = MATCH_ERROR; | |
4100 | } | |
4101 | break; | |
4102 | default: | |
4103 | gfc_error ("Unexpected junk after function declaration at %C"); | |
4104 | found_match = MATCH_ERROR; | |
4105 | break; | |
4106 | } | |
4107 | ||
a8b3b0b6 | 4108 | if (is_bind_c == MATCH_YES) |
01f4fff1 | 4109 | { |
1eabf70a | 4110 | /* Fortran 2008 draft allows BIND(C) for internal procedures. */ |
01f4fff1 | 4111 | if (gfc_current_state () == COMP_CONTAINS |
1eabf70a | 4112 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
fdc54e88 FXC |
4113 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
4114 | "at %L may not be specified for an internal " | |
4115 | "procedure", &gfc_current_locus) | |
1eabf70a TB |
4116 | == FAILURE) |
4117 | return MATCH_ERROR; | |
4118 | ||
01f4fff1 TB |
4119 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) |
4120 | == FAILURE) | |
4121 | return MATCH_ERROR; | |
4122 | } | |
a8b3b0b6 CR |
4123 | |
4124 | return found_match; | |
4125 | } | |
4126 | ||
4127 | ||
3070bab4 JW |
4128 | /* Procedure pointer return value without RESULT statement: |
4129 | Add "hidden" result variable named "ppr@". */ | |
4130 | ||
4131 | static gfc_try | |
4132 | add_hidden_procptr_result (gfc_symbol *sym) | |
4133 | { | |
4134 | bool case1,case2; | |
4135 | ||
4136 | if (gfc_notification_std (GFC_STD_F2003) == ERROR) | |
4137 | return FAILURE; | |
4138 | ||
4139 | /* First usage case: PROCEDURE and EXTERNAL statements. */ | |
4140 | case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block () | |
4141 | && strcmp (gfc_current_block ()->name, sym->name) == 0 | |
4142 | && sym->attr.external; | |
4143 | /* Second usage case: INTERFACE statements. */ | |
4144 | case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous | |
4145 | && gfc_state_stack->previous->state == COMP_FUNCTION | |
4146 | && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0; | |
4147 | ||
4148 | if (case1 || case2) | |
4149 | { | |
4150 | gfc_symtree *stree; | |
4151 | if (case1) | |
08a6b8e0 | 4152 | gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false); |
3070bab4 | 4153 | else if (case2) |
c73b6478 JW |
4154 | { |
4155 | gfc_symtree *st2; | |
08a6b8e0 | 4156 | gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false); |
c73b6478 JW |
4157 | st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@"); |
4158 | st2->n.sym = stree->n.sym; | |
4159 | } | |
3070bab4 JW |
4160 | sym->result = stree->n.sym; |
4161 | ||
4162 | sym->result->attr.proc_pointer = sym->attr.proc_pointer; | |
4163 | sym->result->attr.pointer = sym->attr.pointer; | |
4164 | sym->result->attr.external = sym->attr.external; | |
4165 | sym->result->attr.referenced = sym->attr.referenced; | |
fc9c6e5d | 4166 | sym->result->ts = sym->ts; |
3070bab4 JW |
4167 | sym->attr.proc_pointer = 0; |
4168 | sym->attr.pointer = 0; | |
4169 | sym->attr.external = 0; | |
4170 | if (sym->result->attr.external && sym->result->attr.pointer) | |
4171 | { | |
4172 | sym->result->attr.pointer = 0; | |
4173 | sym->result->attr.proc_pointer = 1; | |
4174 | } | |
4175 | ||
4176 | return gfc_add_result (&sym->result->attr, sym->result->name, NULL); | |
4177 | } | |
4178 | /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */ | |
4179 | else if (sym->attr.function && !sym->attr.external && sym->attr.pointer | |
4180 | && sym->result && sym->result != sym && sym->result->attr.external | |
4181 | && sym == gfc_current_ns->proc_name | |
4182 | && sym == sym->result->ns->proc_name | |
4183 | && strcmp ("ppr@", sym->result->name) == 0) | |
4184 | { | |
4185 | sym->result->attr.proc_pointer = 1; | |
4186 | sym->attr.pointer = 0; | |
4187 | return SUCCESS; | |
4188 | } | |
4189 | else | |
4190 | return FAILURE; | |
4191 | } | |
4192 | ||
4193 | ||
713485cc JW |
4194 | /* Match the interface for a PROCEDURE declaration, |
4195 | including brackets (R1212). */ | |
69773742 JW |
4196 | |
4197 | static match | |
713485cc | 4198 | match_procedure_interface (gfc_symbol **proc_if) |
69773742 JW |
4199 | { |
4200 | match m; | |
3276e0b3 | 4201 | gfc_symtree *st; |
69773742 | 4202 | locus old_loc, entry_loc; |
3276e0b3 PT |
4203 | gfc_namespace *old_ns = gfc_current_ns; |
4204 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
69773742 | 4205 | |
3276e0b3 | 4206 | old_loc = entry_loc = gfc_current_locus; |
69773742 JW |
4207 | gfc_clear_ts (¤t_ts); |
4208 | ||
4209 | if (gfc_match (" (") != MATCH_YES) | |
4210 | { | |
4211 | gfc_current_locus = entry_loc; | |
4212 | return MATCH_NO; | |
4213 | } | |
4214 | ||
4215 | /* Get the type spec. for the procedure interface. */ | |
4216 | old_loc = gfc_current_locus; | |
e74f1cc8 | 4217 | m = gfc_match_decl_type_spec (¤t_ts, 0); |
f4256439 | 4218 | gfc_gobble_whitespace (); |
8fc541d3 | 4219 | if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')')) |
69773742 JW |
4220 | goto got_ts; |
4221 | ||
4222 | if (m == MATCH_ERROR) | |
4223 | return m; | |
4224 | ||
3276e0b3 | 4225 | /* Procedure interface is itself a procedure. */ |
69773742 | 4226 | gfc_current_locus = old_loc; |
3276e0b3 | 4227 | m = gfc_match_name (name); |
69773742 | 4228 | |
3276e0b3 PT |
4229 | /* First look to see if it is already accessible in the current |
4230 | namespace because it is use associated or contained. */ | |
4231 | st = NULL; | |
4232 | if (gfc_find_sym_tree (name, NULL, 0, &st)) | |
4233 | return MATCH_ERROR; | |
4234 | ||
4235 | /* If it is still not found, then try the parent namespace, if it | |
4236 | exists and create the symbol there if it is still not found. */ | |
4237 | if (gfc_current_ns->parent) | |
4238 | gfc_current_ns = gfc_current_ns->parent; | |
4239 | if (st == NULL && gfc_get_ha_sym_tree (name, &st)) | |
4240 | return MATCH_ERROR; | |
4241 | ||
4242 | gfc_current_ns = old_ns; | |
4243 | *proc_if = st->n.sym; | |
69773742 JW |
4244 | |
4245 | /* Various interface checks. */ | |
713485cc | 4246 | if (*proc_if) |
69773742 | 4247 | { |
713485cc | 4248 | (*proc_if)->refs++; |
bb343a6c TB |
4249 | /* Resolve interface if possible. That way, attr.procedure is only set |
4250 | if it is declared by a later procedure-declaration-stmt, which is | |
4251 | invalid per C1212. */ | |
713485cc JW |
4252 | while ((*proc_if)->ts.interface) |
4253 | *proc_if = (*proc_if)->ts.interface; | |
bb343a6c | 4254 | |
713485cc | 4255 | if ((*proc_if)->generic) |
69773742 | 4256 | { |
713485cc JW |
4257 | gfc_error ("Interface '%s' at %C may not be generic", |
4258 | (*proc_if)->name); | |
69773742 JW |
4259 | return MATCH_ERROR; |
4260 | } | |
713485cc | 4261 | if ((*proc_if)->attr.proc == PROC_ST_FUNCTION) |
69773742 JW |
4262 | { |
4263 | gfc_error ("Interface '%s' at %C may not be a statement function", | |
713485cc | 4264 | (*proc_if)->name); |
69773742 JW |
4265 | return MATCH_ERROR; |
4266 | } | |
4267 | /* Handle intrinsic procedures. */ | |
713485cc JW |
4268 | if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc |
4269 | || (*proc_if)->attr.if_source == IFSRC_IFBODY) | |
4270 | && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus) | |
4271 | || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus))) | |
4272 | (*proc_if)->attr.intrinsic = 1; | |
4273 | if ((*proc_if)->attr.intrinsic | |
4274 | && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0)) | |
69773742 JW |
4275 | { |
4276 | gfc_error ("Intrinsic procedure '%s' not allowed " | |
713485cc | 4277 | "in PROCEDURE statement at %C", (*proc_if)->name); |
69773742 JW |
4278 | return MATCH_ERROR; |
4279 | } | |
69773742 JW |
4280 | } |
4281 | ||
4282 | got_ts: | |
69773742 JW |
4283 | if (gfc_match (" )") != MATCH_YES) |
4284 | { | |
4285 | gfc_current_locus = entry_loc; | |
4286 | return MATCH_NO; | |
4287 | } | |
4288 | ||
713485cc JW |
4289 | return MATCH_YES; |
4290 | } | |
4291 | ||
4292 | ||
4293 | /* Match a PROCEDURE declaration (R1211). */ | |
4294 | ||
4295 | static match | |
4296 | match_procedure_decl (void) | |
4297 | { | |
4298 | match m; | |
4299 | gfc_symbol *sym, *proc_if = NULL; | |
4300 | int num; | |
4301 | gfc_expr *initializer = NULL; | |
4302 | ||
4303 | /* Parse interface (with brackets). */ | |
4304 | m = match_procedure_interface (&proc_if); | |
4305 | if (m != MATCH_YES) | |
4306 | return m; | |
4307 | ||
4308 | /* Parse attributes (with colons). */ | |
69773742 JW |
4309 | m = match_attr_spec(); |
4310 | if (m == MATCH_ERROR) | |
4311 | return MATCH_ERROR; | |
4312 | ||
4313 | /* Get procedure symbols. */ | |
4314 | for(num=1;;num++) | |
4315 | { | |
69773742 JW |
4316 | m = gfc_match_symbol (&sym, 0); |
4317 | if (m == MATCH_NO) | |
4318 | goto syntax; | |
4319 | else if (m == MATCH_ERROR) | |
4320 | return m; | |
4321 | ||
4322 | /* Add current_attr to the symbol attributes. */ | |
4323 | if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
4324 | return MATCH_ERROR; | |
4325 | ||
4326 | if (sym->attr.is_bind_c) | |
4327 | { | |
4328 | /* Check for C1218. */ | |
4329 | if (!proc_if || !proc_if->attr.is_bind_c) | |
4330 | { | |
4331 | gfc_error ("BIND(C) attribute at %C requires " | |
4332 | "an interface with BIND(C)"); | |
4333 | return MATCH_ERROR; | |
4334 | } | |
4335 | /* Check for C1217. */ | |
4336 | if (has_name_equals && sym->attr.pointer) | |
4337 | { | |
4338 | gfc_error ("BIND(C) procedure with NAME may not have " | |
4339 | "POINTER attribute at %C"); | |
4340 | return MATCH_ERROR; | |
4341 | } | |
4342 | if (has_name_equals && sym->attr.dummy) | |
4343 | { | |
4344 | gfc_error ("Dummy procedure at %C may not have " | |
4345 | "BIND(C) attribute with NAME"); | |
4346 | return MATCH_ERROR; | |
4347 | } | |
4348 | /* Set binding label for BIND(C). */ | |
4349 | if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS) | |
4350 | return MATCH_ERROR; | |
4351 | } | |
4352 | ||
8fb74da4 | 4353 | if (gfc_add_external (&sym->attr, NULL) == FAILURE) |
69773742 | 4354 | return MATCH_ERROR; |
3070bab4 JW |
4355 | |
4356 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4357 | sym = sym->result; | |
4358 | ||
69773742 JW |
4359 | if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE) |
4360 | return MATCH_ERROR; | |
4361 | ||
4362 | /* Set interface. */ | |
4363 | if (proc_if != NULL) | |
6cc309c9 | 4364 | { |
1d146030 JW |
4365 | if (sym->ts.type != BT_UNKNOWN) |
4366 | { | |
4367 | gfc_error ("Procedure '%s' at %L already has basic type of %s", | |
4368 | sym->name, &gfc_current_locus, | |
4369 | gfc_basic_typename (sym->ts.type)); | |
4370 | return MATCH_ERROR; | |
4371 | } | |
32d99e68 | 4372 | sym->ts.interface = proc_if; |
6cc309c9 | 4373 | sym->attr.untyped = 1; |
c73b6478 | 4374 | sym->attr.if_source = IFSRC_IFBODY; |
6cc309c9 | 4375 | } |
69773742 JW |
4376 | else if (current_ts.type != BT_UNKNOWN) |
4377 | { | |
1d146030 JW |
4378 | if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) |
4379 | return MATCH_ERROR; | |
32d99e68 JW |
4380 | sym->ts.interface = gfc_new_symbol ("", gfc_current_ns); |
4381 | sym->ts.interface->ts = current_ts; | |
4382 | sym->ts.interface->attr.function = 1; | |
4383 | sym->attr.function = sym->ts.interface->attr.function; | |
c73b6478 | 4384 | sym->attr.if_source = IFSRC_UNKNOWN; |
69773742 JW |
4385 | } |
4386 | ||
8fb74da4 JW |
4387 | if (gfc_match (" =>") == MATCH_YES) |
4388 | { | |
4389 | if (!current_attr.pointer) | |
4390 | { | |
4391 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
4392 | m = MATCH_ERROR; | |
4393 | goto cleanup; | |
4394 | } | |
4395 | ||
4396 | m = gfc_match_null (&initializer); | |
4397 | if (m == MATCH_NO) | |
4398 | { | |
4399 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4400 | m = MATCH_ERROR; | |
4401 | } | |
4402 | ||
4403 | if (gfc_pure (NULL)) | |
4404 | { | |
4405 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4406 | "a PURE procedure"); | |
4407 | m = MATCH_ERROR; | |
4408 | } | |
4409 | ||
4410 | if (m != MATCH_YES) | |
4411 | goto cleanup; | |
4412 | ||
4413 | if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus) | |
4414 | != SUCCESS) | |
4415 | goto cleanup; | |
4416 | ||
4417 | } | |
4418 | ||
4419 | gfc_set_sym_referenced (sym); | |
4420 | ||
69773742 JW |
4421 | if (gfc_match_eos () == MATCH_YES) |
4422 | return MATCH_YES; | |
4423 | if (gfc_match_char (',') != MATCH_YES) | |
4424 | goto syntax; | |
4425 | } | |
4426 | ||
4427 | syntax: | |
4428 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4429 | return MATCH_ERROR; | |
8fb74da4 JW |
4430 | |
4431 | cleanup: | |
4432 | /* Free stuff up and return. */ | |
4433 | gfc_free_expr (initializer); | |
4434 | return m; | |
69773742 JW |
4435 | } |
4436 | ||
4437 | ||
713485cc JW |
4438 | static match |
4439 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc); | |
4440 | ||
4441 | ||
4442 | /* Match a procedure pointer component declaration (R445). */ | |
4443 | ||
4444 | static match | |
4445 | match_ppc_decl (void) | |
4446 | { | |
4447 | match m; | |
4448 | gfc_symbol *proc_if = NULL; | |
4449 | gfc_typespec ts; | |
4450 | int num; | |
4451 | gfc_component *c; | |
4452 | gfc_expr *initializer = NULL; | |
4453 | gfc_typebound_proc* tb; | |
4454 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4455 | ||
4456 | /* Parse interface (with brackets). */ | |
4457 | m = match_procedure_interface (&proc_if); | |
4458 | if (m != MATCH_YES) | |
4459 | goto syntax; | |
4460 | ||
4461 | /* Parse attributes. */ | |
4462 | tb = XCNEW (gfc_typebound_proc); | |
4463 | tb->where = gfc_current_locus; | |
4464 | m = match_binding_attributes (tb, false, true); | |
4465 | if (m == MATCH_ERROR) | |
4466 | return m; | |
4467 | ||
713485cc JW |
4468 | gfc_clear_attr (¤t_attr); |
4469 | current_attr.procedure = 1; | |
4470 | current_attr.proc_pointer = 1; | |
4471 | current_attr.access = tb->access; | |
4472 | current_attr.flavor = FL_PROCEDURE; | |
4473 | ||
4474 | /* Match the colons (required). */ | |
4475 | if (gfc_match (" ::") != MATCH_YES) | |
4476 | { | |
4477 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
4478 | return MATCH_ERROR; | |
4479 | } | |
4480 | ||
4481 | /* Check for C450. */ | |
4482 | if (!tb->nopass && proc_if == NULL) | |
4483 | { | |
4484 | gfc_error("NOPASS or explicit interface required at %C"); | |
4485 | return MATCH_ERROR; | |
4486 | } | |
4487 | ||
3212c187 SK |
4488 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Procedure pointer " |
4489 | "component at %C") == FAILURE) | |
4490 | return MATCH_ERROR; | |
4491 | ||
713485cc JW |
4492 | /* Match PPC names. */ |
4493 | ts = current_ts; | |
4494 | for(num=1;;num++) | |
4495 | { | |
4496 | m = gfc_match_name (name); | |
4497 | if (m == MATCH_NO) | |
4498 | goto syntax; | |
4499 | else if (m == MATCH_ERROR) | |
4500 | return m; | |
4501 | ||
4502 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
4503 | return MATCH_ERROR; | |
4504 | ||
4505 | /* Add current_attr to the symbol attributes. */ | |
4506 | if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE) | |
4507 | return MATCH_ERROR; | |
4508 | ||
4509 | if (gfc_add_external (&c->attr, NULL) == FAILURE) | |
4510 | return MATCH_ERROR; | |
4511 | ||
4512 | if (gfc_add_proc (&c->attr, name, NULL) == FAILURE) | |
4513 | return MATCH_ERROR; | |
4514 | ||
90661f26 JW |
4515 | c->tb = tb; |
4516 | ||
713485cc JW |
4517 | /* Set interface. */ |
4518 | if (proc_if != NULL) | |
4519 | { | |
4520 | c->ts.interface = proc_if; | |
4521 | c->attr.untyped = 1; | |
4522 | c->attr.if_source = IFSRC_IFBODY; | |
4523 | } | |
4524 | else if (ts.type != BT_UNKNOWN) | |
4525 | { | |
4526 | c->ts = ts; | |
4527 | c->ts.interface = gfc_new_symbol ("", gfc_current_ns); | |
4528 | c->ts.interface->ts = ts; | |
4529 | c->ts.interface->attr.function = 1; | |
4530 | c->attr.function = c->ts.interface->attr.function; | |
4531 | c->attr.if_source = IFSRC_UNKNOWN; | |
4532 | } | |
4533 | ||
4534 | if (gfc_match (" =>") == MATCH_YES) | |
4535 | { | |
4536 | m = gfc_match_null (&initializer); | |
4537 | if (m == MATCH_NO) | |
4538 | { | |
4539 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4540 | m = MATCH_ERROR; | |
4541 | } | |
4542 | if (gfc_pure (NULL)) | |
4543 | { | |
4544 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4545 | "a PURE procedure"); | |
4546 | m = MATCH_ERROR; | |
4547 | } | |
4548 | if (m != MATCH_YES) | |
4549 | { | |
4550 | gfc_free_expr (initializer); | |
4551 | return m; | |
4552 | } | |
4553 | c->initializer = initializer; | |
4554 | } | |
4555 | ||
4556 | if (gfc_match_eos () == MATCH_YES) | |
4557 | return MATCH_YES; | |
4558 | if (gfc_match_char (',') != MATCH_YES) | |
4559 | goto syntax; | |
4560 | } | |
4561 | ||
4562 | syntax: | |
4563 | gfc_error ("Syntax error in procedure pointer component at %C"); | |
4564 | return MATCH_ERROR; | |
4565 | } | |
4566 | ||
4567 | ||
69773742 JW |
4568 | /* Match a PROCEDURE declaration inside an interface (R1206). */ |
4569 | ||
4570 | static match | |
4571 | match_procedure_in_interface (void) | |
4572 | { | |
4573 | match m; | |
4574 | gfc_symbol *sym; | |
4575 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4576 | ||
4577 | if (current_interface.type == INTERFACE_NAMELESS | |
4578 | || current_interface.type == INTERFACE_ABSTRACT) | |
4579 | { | |
4580 | gfc_error ("PROCEDURE at %C must be in a generic interface"); | |
4581 | return MATCH_ERROR; | |
4582 | } | |
4583 | ||
4584 | for(;;) | |
4585 | { | |
4586 | m = gfc_match_name (name); | |
4587 | if (m == MATCH_NO) | |
4588 | goto syntax; | |
4589 | else if (m == MATCH_ERROR) | |
4590 | return m; | |
4591 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
4592 | return MATCH_ERROR; | |
4593 | ||
4594 | if (gfc_add_interface (sym) == FAILURE) | |
4595 | return MATCH_ERROR; | |
4596 | ||
69773742 JW |
4597 | if (gfc_match_eos () == MATCH_YES) |
4598 | break; | |
4599 | if (gfc_match_char (',') != MATCH_YES) | |
4600 | goto syntax; | |
4601 | } | |
4602 | ||
4603 | return MATCH_YES; | |
4604 | ||
4605 | syntax: | |
4606 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4607 | return MATCH_ERROR; | |
4608 | } | |
4609 | ||
4610 | ||
4611 | /* General matcher for PROCEDURE declarations. */ | |
4612 | ||
30b608eb DK |
4613 | static match match_procedure_in_type (void); |
4614 | ||
69773742 JW |
4615 | match |
4616 | gfc_match_procedure (void) | |
4617 | { | |
4618 | match m; | |
4619 | ||
4620 | switch (gfc_current_state ()) | |
4621 | { | |
4622 | case COMP_NONE: | |
4623 | case COMP_PROGRAM: | |
4624 | case COMP_MODULE: | |
4625 | case COMP_SUBROUTINE: | |
4626 | case COMP_FUNCTION: | |
4627 | m = match_procedure_decl (); | |
4628 | break; | |
4629 | case COMP_INTERFACE: | |
4630 | m = match_procedure_in_interface (); | |
4631 | break; | |
4632 | case COMP_DERIVED: | |
713485cc JW |
4633 | m = match_ppc_decl (); |
4634 | break; | |
30b608eb DK |
4635 | case COMP_DERIVED_CONTAINS: |
4636 | m = match_procedure_in_type (); | |
4637 | break; | |
69773742 JW |
4638 | default: |
4639 | return MATCH_NO; | |
4640 | } | |
4641 | ||
4642 | if (m != MATCH_YES) | |
4643 | return m; | |
4644 | ||
4645 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C") | |
4646 | == FAILURE) | |
4647 | return MATCH_ERROR; | |
4648 | ||
4649 | return m; | |
4650 | } | |
4651 | ||
4652 | ||
c3005b0f DK |
4653 | /* Warn if a matched procedure has the same name as an intrinsic; this is |
4654 | simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current | |
4655 | parser-state-stack to find out whether we're in a module. */ | |
4656 | ||
4657 | static void | |
4658 | warn_intrinsic_shadow (const gfc_symbol* sym, bool func) | |
4659 | { | |
4660 | bool in_module; | |
4661 | ||
4662 | in_module = (gfc_state_stack->previous | |
4663 | && gfc_state_stack->previous->state == COMP_MODULE); | |
4664 | ||
4665 | gfc_warn_intrinsic_shadow (sym, in_module, func); | |
4666 | } | |
4667 | ||
4668 | ||
6de9cd9a DN |
4669 | /* Match a function declaration. */ |
4670 | ||
4671 | match | |
4672 | gfc_match_function_decl (void) | |
4673 | { | |
4674 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4675 | gfc_symbol *sym, *result; | |
4676 | locus old_loc; | |
4677 | match m; | |
a8b3b0b6 CR |
4678 | match suffix_match; |
4679 | match found_match; /* Status returned by match func. */ | |
6de9cd9a DN |
4680 | |
4681 | if (gfc_current_state () != COMP_NONE | |
4682 | && gfc_current_state () != COMP_INTERFACE | |
4683 | && gfc_current_state () != COMP_CONTAINS) | |
4684 | return MATCH_NO; | |
4685 | ||
4686 | gfc_clear_ts (¤t_ts); | |
4687 | ||
63645982 | 4688 | old_loc = gfc_current_locus; |
6de9cd9a | 4689 | |
1c8bcdf7 | 4690 | m = gfc_match_prefix (¤t_ts); |
6de9cd9a DN |
4691 | if (m != MATCH_YES) |
4692 | { | |
63645982 | 4693 | gfc_current_locus = old_loc; |
6de9cd9a DN |
4694 | return m; |
4695 | } | |
4696 | ||
4697 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
4698 | { | |
63645982 | 4699 | gfc_current_locus = old_loc; |
6de9cd9a DN |
4700 | return MATCH_NO; |
4701 | } | |
1a492601 | 4702 | if (get_proc_name (name, &sym, false)) |
6de9cd9a | 4703 | return MATCH_ERROR; |
3070bab4 JW |
4704 | |
4705 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4706 | sym = sym->result; | |
4707 | ||
6de9cd9a DN |
4708 | gfc_new_block = sym; |
4709 | ||
4710 | m = gfc_match_formal_arglist (sym, 0, 0); | |
4711 | if (m == MATCH_NO) | |
2b9a33ae TS |
4712 | { |
4713 | gfc_error ("Expected formal argument list in function " | |
636dff67 | 4714 | "definition at %C"); |
2b9a33ae TS |
4715 | m = MATCH_ERROR; |
4716 | goto cleanup; | |
4717 | } | |
6de9cd9a DN |
4718 | else if (m == MATCH_ERROR) |
4719 | goto cleanup; | |
4720 | ||
4721 | result = NULL; | |
4722 | ||
a8b3b0b6 CR |
4723 | /* According to the draft, the bind(c) and result clause can |
4724 | come in either order after the formal_arg_list (i.e., either | |
4725 | can be first, both can exist together or by themselves or neither | |
4726 | one). Therefore, the match_result can't match the end of the | |
4727 | string, and check for the bind(c) or result clause in either order. */ | |
4728 | found_match = gfc_match_eos (); | |
4729 | ||
4730 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
4731 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4732 | not allowed for procedures. */ | |
4733 | if (sym->attr.is_bind_c == 1) | |
4734 | { | |
4735 | sym->attr.is_bind_c = 0; | |
4736 | if (sym->old_symbol != NULL) | |
4737 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4738 | "variables or common blocks", | |
4739 | &(sym->old_symbol->declared_at)); | |
4740 | else | |
4741 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4742 | "variables or common blocks", &gfc_current_locus); | |
6de9cd9a DN |
4743 | } |
4744 | ||
a8b3b0b6 | 4745 | if (found_match != MATCH_YES) |
6de9cd9a | 4746 | { |
a8b3b0b6 CR |
4747 | /* If we haven't found the end-of-statement, look for a suffix. */ |
4748 | suffix_match = gfc_match_suffix (sym, &result); | |
4749 | if (suffix_match == MATCH_YES) | |
4750 | /* Need to get the eos now. */ | |
4751 | found_match = gfc_match_eos (); | |
4752 | else | |
4753 | found_match = suffix_match; | |
6de9cd9a DN |
4754 | } |
4755 | ||
a8b3b0b6 CR |
4756 | if(found_match != MATCH_YES) |
4757 | m = MATCH_ERROR; | |
6de9cd9a DN |
4758 | else |
4759 | { | |
a8b3b0b6 CR |
4760 | /* Make changes to the symbol. */ |
4761 | m = MATCH_ERROR; | |
4762 | ||
4763 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) | |
4764 | goto cleanup; | |
4765 | ||
4766 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
4767 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
4768 | goto cleanup; | |
6de9cd9a | 4769 | |
a99d95a2 | 4770 | /* Delay matching the function characteristics until after the |
1c8bcdf7 | 4771 | specification block by signalling kind=-1. */ |
a99d95a2 PT |
4772 | sym->declared_at = old_loc; |
4773 | if (current_ts.type != BT_UNKNOWN) | |
4774 | current_ts.kind = -1; | |
4775 | else | |
4776 | current_ts.kind = 0; | |
1c8bcdf7 | 4777 | |
a8b3b0b6 CR |
4778 | if (result == NULL) |
4779 | { | |
6de7294f JW |
4780 | if (current_ts.type != BT_UNKNOWN |
4781 | && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) | |
4782 | goto cleanup; | |
a8b3b0b6 CR |
4783 | sym->result = sym; |
4784 | } | |
4785 | else | |
4786 | { | |
6de7294f JW |
4787 | if (current_ts.type != BT_UNKNOWN |
4788 | && gfc_add_type (result, ¤t_ts, &gfc_current_locus) | |
4789 | == FAILURE) | |
4790 | goto cleanup; | |
a8b3b0b6 CR |
4791 | sym->result = result; |
4792 | } | |
4793 | ||
c3005b0f DK |
4794 | /* Warn if this procedure has the same name as an intrinsic. */ |
4795 | warn_intrinsic_shadow (sym, true); | |
4796 | ||
a8b3b0b6 CR |
4797 | return MATCH_YES; |
4798 | } | |
6de9cd9a DN |
4799 | |
4800 | cleanup: | |
63645982 | 4801 | gfc_current_locus = old_loc; |
6de9cd9a DN |
4802 | return m; |
4803 | } | |
4804 | ||
636dff67 SK |
4805 | |
4806 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
4807 | pass the name of the entry, rather than the gfc_current_block name, and | |
4808 | to return false upon finding an existing global entry. */ | |
68ea355b PT |
4809 | |
4810 | static bool | |
636dff67 | 4811 | add_global_entry (const char *name, int sub) |
68ea355b PT |
4812 | { |
4813 | gfc_gsymbol *s; | |
32e8bb8e | 4814 | enum gfc_symbol_type type; |
68ea355b PT |
4815 | |
4816 | s = gfc_get_gsymbol(name); | |
7389bce6 | 4817 | type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; |
68ea355b PT |
4818 | |
4819 | if (s->defined | |
636dff67 | 4820 | || (s->type != GSYM_UNKNOWN |
7389bce6 | 4821 | && s->type != type)) |
ca39e6f2 | 4822 | gfc_global_used(s, NULL); |
68ea355b PT |
4823 | else |
4824 | { | |
7389bce6 | 4825 | s->type = type; |
68ea355b PT |
4826 | s->where = gfc_current_locus; |
4827 | s->defined = 1; | |
71a7778c | 4828 | s->ns = gfc_current_ns; |
68ea355b PT |
4829 | return true; |
4830 | } | |
4831 | return false; | |
4832 | } | |
6de9cd9a | 4833 | |
636dff67 | 4834 | |
6de9cd9a DN |
4835 | /* Match an ENTRY statement. */ |
4836 | ||
4837 | match | |
4838 | gfc_match_entry (void) | |
4839 | { | |
3d79abbd PB |
4840 | gfc_symbol *proc; |
4841 | gfc_symbol *result; | |
4842 | gfc_symbol *entry; | |
6de9cd9a DN |
4843 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
4844 | gfc_compile_state state; | |
4845 | match m; | |
3d79abbd | 4846 | gfc_entry_list *el; |
c96cfa49 | 4847 | locus old_loc; |
1a492601 | 4848 | bool module_procedure; |
bc3e7a8c TB |
4849 | char peek_char; |
4850 | match is_bind_c; | |
6de9cd9a DN |
4851 | |
4852 | m = gfc_match_name (name); | |
4853 | if (m != MATCH_YES) | |
4854 | return m; | |
4855 | ||
3d79abbd | 4856 | state = gfc_current_state (); |
4c93c95a | 4857 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
3d79abbd | 4858 | { |
4c93c95a FXC |
4859 | switch (state) |
4860 | { | |
4861 | case COMP_PROGRAM: | |
4862 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
4863 | break; | |
4864 | case COMP_MODULE: | |
4865 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
4866 | break; | |
4867 | case COMP_BLOCK_DATA: | |
636dff67 SK |
4868 | gfc_error ("ENTRY statement at %C cannot appear within " |
4869 | "a BLOCK DATA"); | |
4c93c95a FXC |
4870 | break; |
4871 | case COMP_INTERFACE: | |
636dff67 SK |
4872 | gfc_error ("ENTRY statement at %C cannot appear within " |
4873 | "an INTERFACE"); | |
4c93c95a FXC |
4874 | break; |
4875 | case COMP_DERIVED: | |
636dff67 SK |
4876 | gfc_error ("ENTRY statement at %C cannot appear within " |
4877 | "a DERIVED TYPE block"); | |
4c93c95a FXC |
4878 | break; |
4879 | case COMP_IF: | |
636dff67 SK |
4880 | gfc_error ("ENTRY statement at %C cannot appear within " |
4881 | "an IF-THEN block"); | |
4c93c95a FXC |
4882 | break; |
4883 | case COMP_DO: | |
636dff67 SK |
4884 | gfc_error ("ENTRY statement at %C cannot appear within " |
4885 | "a DO block"); | |
4c93c95a FXC |
4886 | break; |
4887 | case COMP_SELECT: | |
636dff67 SK |
4888 | gfc_error ("ENTRY statement at %C cannot appear within " |
4889 | "a SELECT block"); | |
4c93c95a FXC |
4890 | break; |
4891 | case COMP_FORALL: | |
636dff67 SK |
4892 | gfc_error ("ENTRY statement at %C cannot appear within " |
4893 | "a FORALL block"); | |
4c93c95a FXC |
4894 | break; |
4895 | case COMP_WHERE: | |
636dff67 SK |
4896 | gfc_error ("ENTRY statement at %C cannot appear within " |
4897 | "a WHERE block"); | |
4c93c95a FXC |
4898 | break; |
4899 | case COMP_CONTAINS: | |
636dff67 SK |
4900 | gfc_error ("ENTRY statement at %C cannot appear within " |
4901 | "a contained subprogram"); | |
4c93c95a FXC |
4902 | break; |
4903 | default: | |
4904 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
4905 | } | |
3d79abbd PB |
4906 | return MATCH_ERROR; |
4907 | } | |
4908 | ||
1a492601 | 4909 | module_procedure = gfc_current_ns->parent != NULL |
636dff67 SK |
4910 | && gfc_current_ns->parent->proc_name |
4911 | && gfc_current_ns->parent->proc_name->attr.flavor | |
4912 | == FL_MODULE; | |
1a492601 | 4913 | |
3d79abbd PB |
4914 | if (gfc_current_ns->parent != NULL |
4915 | && gfc_current_ns->parent->proc_name | |
1a492601 | 4916 | && !module_procedure) |
3d79abbd PB |
4917 | { |
4918 | gfc_error("ENTRY statement at %C cannot appear in a " | |
4919 | "contained procedure"); | |
4920 | return MATCH_ERROR; | |
4921 | } | |
4922 | ||
1a492601 PT |
4923 | /* Module function entries need special care in get_proc_name |
4924 | because previous references within the function will have | |
4925 | created symbols attached to the current namespace. */ | |
4926 | if (get_proc_name (name, &entry, | |
4927 | gfc_current_ns->parent != NULL | |
ecd3b73c | 4928 | && module_procedure)) |
6de9cd9a DN |
4929 | return MATCH_ERROR; |
4930 | ||
3d79abbd PB |
4931 | proc = gfc_current_block (); |
4932 | ||
bc3e7a8c TB |
4933 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
4934 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4935 | not allowed for procedures. */ | |
4936 | if (entry->attr.is_bind_c == 1) | |
4937 | { | |
4938 | entry->attr.is_bind_c = 0; | |
4939 | if (entry->old_symbol != NULL) | |
4940 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4941 | "variables or common blocks", | |
4942 | &(entry->old_symbol->declared_at)); | |
4943 | else | |
4944 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4945 | "variables or common blocks", &gfc_current_locus); | |
4946 | } | |
4947 | ||
4948 | /* Check what next non-whitespace character is so we can tell if there | |
4949 | is the required parens if we have a BIND(C). */ | |
4950 | gfc_gobble_whitespace (); | |
8fc541d3 | 4951 | peek_char = gfc_peek_ascii_char (); |
bc3e7a8c | 4952 | |
3d79abbd | 4953 | if (state == COMP_SUBROUTINE) |
6de9cd9a | 4954 | { |
231b2fcc | 4955 | /* An entry in a subroutine. */ |
182393f4 | 4956 | if (!gfc_current_ns->parent && !add_global_entry (name, 1)) |
68ea355b PT |
4957 | return MATCH_ERROR; |
4958 | ||
6de9cd9a DN |
4959 | m = gfc_match_formal_arglist (entry, 0, 1); |
4960 | if (m != MATCH_YES) | |
4961 | return MATCH_ERROR; | |
4962 | ||
1eabf70a TB |
4963 | /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can |
4964 | never be an internal procedure. */ | |
4965 | is_bind_c = gfc_match_bind_c (entry, true); | |
bc3e7a8c TB |
4966 | if (is_bind_c == MATCH_ERROR) |
4967 | return MATCH_ERROR; | |
4968 | if (is_bind_c == MATCH_YES) | |
4969 | { | |
4970 | if (peek_char != '(') | |
4971 | { | |
4972 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
4973 | return MATCH_ERROR; | |
4974 | } | |
4975 | if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1) | |
4976 | == FAILURE) | |
4977 | return MATCH_ERROR; | |
4978 | } | |
4979 | ||
231b2fcc TS |
4980 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
4981 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a | 4982 | return MATCH_ERROR; |
3d79abbd PB |
4983 | } |
4984 | else | |
4985 | { | |
c96cfa49 | 4986 | /* An entry in a function. |
636dff67 SK |
4987 | We need to take special care because writing |
4988 | ENTRY f() | |
4989 | as | |
4990 | ENTRY f | |
4991 | is allowed, whereas | |
4992 | ENTRY f() RESULT (r) | |
4993 | can't be written as | |
4994 | ENTRY f RESULT (r). */ | |
182393f4 | 4995 | if (!gfc_current_ns->parent && !add_global_entry (name, 0)) |
68ea355b PT |
4996 | return MATCH_ERROR; |
4997 | ||
c96cfa49 TS |
4998 | old_loc = gfc_current_locus; |
4999 | if (gfc_match_eos () == MATCH_YES) | |
5000 | { | |
5001 | gfc_current_locus = old_loc; | |
5002 | /* Match the empty argument list, and add the interface to | |
5003 | the symbol. */ | |
5004 | m = gfc_match_formal_arglist (entry, 0, 1); | |
5005 | } | |
5006 | else | |
5007 | m = gfc_match_formal_arglist (entry, 0, 0); | |
5008 | ||
6de9cd9a DN |
5009 | if (m != MATCH_YES) |
5010 | return MATCH_ERROR; | |
5011 | ||
6de9cd9a DN |
5012 | result = NULL; |
5013 | ||
5014 | if (gfc_match_eos () == MATCH_YES) | |
5015 | { | |
231b2fcc TS |
5016 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
5017 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a DN |
5018 | return MATCH_ERROR; |
5019 | ||
d198b59a | 5020 | entry->result = entry; |
6de9cd9a DN |
5021 | } |
5022 | else | |
5023 | { | |
bc3e7a8c | 5024 | m = gfc_match_suffix (entry, &result); |
6de9cd9a DN |
5025 | if (m == MATCH_NO) |
5026 | gfc_syntax_error (ST_ENTRY); | |
5027 | if (m != MATCH_YES) | |
5028 | return MATCH_ERROR; | |
5029 | ||
bc3e7a8c TB |
5030 | if (result) |
5031 | { | |
5032 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE | |
5033 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
5034 | || gfc_add_function (&entry->attr, result->name, NULL) | |
5035 | == FAILURE) | |
5036 | return MATCH_ERROR; | |
5037 | entry->result = result; | |
5038 | } | |
5039 | else | |
5040 | { | |
5041 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE | |
5042 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
5043 | return MATCH_ERROR; | |
5044 | entry->result = entry; | |
5045 | } | |
6de9cd9a | 5046 | } |
6de9cd9a DN |
5047 | } |
5048 | ||
5049 | if (gfc_match_eos () != MATCH_YES) | |
5050 | { | |
5051 | gfc_syntax_error (ST_ENTRY); | |
5052 | return MATCH_ERROR; | |
5053 | } | |
5054 | ||
3d79abbd PB |
5055 | entry->attr.recursive = proc->attr.recursive; |
5056 | entry->attr.elemental = proc->attr.elemental; | |
5057 | entry->attr.pure = proc->attr.pure; | |
6de9cd9a | 5058 | |
3d79abbd PB |
5059 | el = gfc_get_entry_list (); |
5060 | el->sym = entry; | |
5061 | el->next = gfc_current_ns->entries; | |
5062 | gfc_current_ns->entries = el; | |
5063 | if (el->next) | |
5064 | el->id = el->next->id + 1; | |
5065 | else | |
5066 | el->id = 1; | |
6de9cd9a | 5067 | |
3d79abbd PB |
5068 | new_st.op = EXEC_ENTRY; |
5069 | new_st.ext.entry = el; | |
5070 | ||
5071 | return MATCH_YES; | |
6de9cd9a DN |
5072 | } |
5073 | ||
5074 | ||
5075 | /* Match a subroutine statement, including optional prefixes. */ | |
5076 | ||
5077 | match | |
5078 | gfc_match_subroutine (void) | |
5079 | { | |
5080 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5081 | gfc_symbol *sym; | |
5082 | match m; | |
a8b3b0b6 CR |
5083 | match is_bind_c; |
5084 | char peek_char; | |
1eabf70a | 5085 | bool allow_binding_name; |
6de9cd9a DN |
5086 | |
5087 | if (gfc_current_state () != COMP_NONE | |
5088 | && gfc_current_state () != COMP_INTERFACE | |
5089 | && gfc_current_state () != COMP_CONTAINS) | |
5090 | return MATCH_NO; | |
5091 | ||
1c8bcdf7 | 5092 | m = gfc_match_prefix (NULL); |
6de9cd9a DN |
5093 | if (m != MATCH_YES) |
5094 | return m; | |
5095 | ||
5096 | m = gfc_match ("subroutine% %n", name); | |
5097 | if (m != MATCH_YES) | |
5098 | return m; | |
5099 | ||
1a492601 | 5100 | if (get_proc_name (name, &sym, false)) |
6de9cd9a | 5101 | return MATCH_ERROR; |
3070bab4 | 5102 | |
7fcd5ad5 TB |
5103 | /* Set declared_at as it might point to, e.g., a PUBLIC statement, if |
5104 | the symbol existed before. */ | |
5105 | sym->declared_at = gfc_current_locus; | |
5106 | ||
3070bab4 JW |
5107 | if (add_hidden_procptr_result (sym) == SUCCESS) |
5108 | sym = sym->result; | |
5109 | ||
6de9cd9a DN |
5110 | gfc_new_block = sym; |
5111 | ||
a8b3b0b6 | 5112 | /* Check what next non-whitespace character is so we can tell if there |
bc3e7a8c | 5113 | is the required parens if we have a BIND(C). */ |
a8b3b0b6 | 5114 | gfc_gobble_whitespace (); |
8fc541d3 | 5115 | peek_char = gfc_peek_ascii_char (); |
a8b3b0b6 | 5116 | |
231b2fcc | 5117 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
5118 | return MATCH_ERROR; |
5119 | ||
5120 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
5121 | return MATCH_ERROR; | |
5122 | ||
a8b3b0b6 CR |
5123 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
5124 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
5125 | not allowed for procedures. */ | |
5126 | if (sym->attr.is_bind_c == 1) | |
5127 | { | |
5128 | sym->attr.is_bind_c = 0; | |
5129 | if (sym->old_symbol != NULL) | |
5130 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5131 | "variables or common blocks", | |
5132 | &(sym->old_symbol->declared_at)); | |
5133 | else | |
5134 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5135 | "variables or common blocks", &gfc_current_locus); | |
5136 | } | |
1eabf70a TB |
5137 | |
5138 | /* C binding names are not allowed for internal procedures. */ | |
5139 | if (gfc_current_state () == COMP_CONTAINS | |
5140 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
5141 | allow_binding_name = false; | |
5142 | else | |
5143 | allow_binding_name = true; | |
5144 | ||
a8b3b0b6 CR |
5145 | /* Here, we are just checking if it has the bind(c) attribute, and if |
5146 | so, then we need to make sure it's all correct. If it doesn't, | |
5147 | we still need to continue matching the rest of the subroutine line. */ | |
1eabf70a | 5148 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
a8b3b0b6 CR |
5149 | if (is_bind_c == MATCH_ERROR) |
5150 | { | |
5151 | /* There was an attempt at the bind(c), but it was wrong. An | |
5152 | error message should have been printed w/in the gfc_match_bind_c | |
5153 | so here we'll just return the MATCH_ERROR. */ | |
5154 | return MATCH_ERROR; | |
5155 | } | |
5156 | ||
5157 | if (is_bind_c == MATCH_YES) | |
5158 | { | |
1eabf70a | 5159 | /* The following is allowed in the Fortran 2008 draft. */ |
01f4fff1 | 5160 | if (gfc_current_state () == COMP_CONTAINS |
1eabf70a | 5161 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
fdc54e88 FXC |
5162 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
5163 | "at %L may not be specified for an internal " | |
5164 | "procedure", &gfc_current_locus) | |
1eabf70a TB |
5165 | == FAILURE) |
5166 | return MATCH_ERROR; | |
5167 | ||
a8b3b0b6 CR |
5168 | if (peek_char != '(') |
5169 | { | |
5170 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
5171 | return MATCH_ERROR; | |
5172 | } | |
5173 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) | |
5174 | == FAILURE) | |
5175 | return MATCH_ERROR; | |
5176 | } | |
5177 | ||
6de9cd9a DN |
5178 | if (gfc_match_eos () != MATCH_YES) |
5179 | { | |
5180 | gfc_syntax_error (ST_SUBROUTINE); | |
5181 | return MATCH_ERROR; | |
5182 | } | |
5183 | ||
5184 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
5185 | return MATCH_ERROR; | |
5186 | ||
c3005b0f DK |
5187 | /* Warn if it has the same name as an intrinsic. */ |
5188 | warn_intrinsic_shadow (sym, false); | |
5189 | ||
6de9cd9a DN |
5190 | return MATCH_YES; |
5191 | } | |
5192 | ||
5193 | ||
a8b3b0b6 CR |
5194 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
5195 | given, and set the binding label in either the given symbol (if not | |
86bf520d | 5196 | NULL), or in the current_ts. The symbol may be NULL because we may |
a8b3b0b6 CR |
5197 | encounter the BIND(C) before the declaration itself. Return |
5198 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, | |
5199 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, | |
5200 | or MATCH_YES if the specifier was correct and the binding label and | |
5201 | bind(c) fields were set correctly for the given symbol or the | |
1eabf70a TB |
5202 | current_ts. If allow_binding_name is false, no binding name may be |
5203 | given. */ | |
a8b3b0b6 CR |
5204 | |
5205 | match | |
1eabf70a | 5206 | gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name) |
a8b3b0b6 CR |
5207 | { |
5208 | /* binding label, if exists */ | |
5209 | char binding_label[GFC_MAX_SYMBOL_LEN + 1]; | |
5210 | match double_quote; | |
5211 | match single_quote; | |
a8b3b0b6 CR |
5212 | |
5213 | /* Initialize the flag that specifies whether we encountered a NAME= | |
5214 | specifier or not. */ | |
5215 | has_name_equals = 0; | |
5216 | ||
5217 | /* Init the first char to nil so we can catch if we don't have | |
5218 | the label (name attr) or the symbol name yet. */ | |
5219 | binding_label[0] = '\0'; | |
5220 | ||
5221 | /* This much we have to be able to match, in this order, if | |
5222 | there is a bind(c) label. */ | |
5223 | if (gfc_match (" bind ( c ") != MATCH_YES) | |
5224 | return MATCH_NO; | |
5225 | ||
5226 | /* Now see if there is a binding label, or if we've reached the | |
5227 | end of the bind(c) attribute without one. */ | |
5228 | if (gfc_match_char (',') == MATCH_YES) | |
5229 | { | |
5230 | if (gfc_match (" name = ") != MATCH_YES) | |
5231 | { | |
5232 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5233 | "at %C"); | |
5234 | /* should give an error message here */ | |
5235 | return MATCH_ERROR; | |
5236 | } | |
5237 | ||
5238 | has_name_equals = 1; | |
5239 | ||
5240 | /* Get the opening quote. */ | |
5241 | double_quote = MATCH_YES; | |
5242 | single_quote = MATCH_YES; | |
5243 | double_quote = gfc_match_char ('"'); | |
5244 | if (double_quote != MATCH_YES) | |
5245 | single_quote = gfc_match_char ('\''); | |
5246 | if (double_quote != MATCH_YES && single_quote != MATCH_YES) | |
5247 | { | |
5248 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5249 | "at %C"); | |
5250 | return MATCH_ERROR; | |
5251 | } | |
5252 | ||
5253 | /* Grab the binding label, using functions that will not lower | |
5254 | case the names automatically. */ | |
5255 | if (gfc_match_name_C (binding_label) != MATCH_YES) | |
5256 | return MATCH_ERROR; | |
5257 | ||
5258 | /* Get the closing quotation. */ | |
5259 | if (double_quote == MATCH_YES) | |
5260 | { | |
5261 | if (gfc_match_char ('"') != MATCH_YES) | |
5262 | { | |
5263 | gfc_error ("Missing closing quote '\"' for binding label at %C"); | |
5264 | /* User started string with '"' so looked to match it. */ | |
5265 | return MATCH_ERROR; | |
5266 | } | |
5267 | } | |
5268 | else | |
5269 | { | |
5270 | if (gfc_match_char ('\'') != MATCH_YES) | |
5271 | { | |
5272 | gfc_error ("Missing closing quote '\'' for binding label at %C"); | |
5273 | /* User started string with "'" char. */ | |
5274 | return MATCH_ERROR; | |
5275 | } | |
5276 | } | |
5277 | } | |
5278 | ||
5279 | /* Get the required right paren. */ | |
5280 | if (gfc_match_char (')') != MATCH_YES) | |
5281 | { | |
5282 | gfc_error ("Missing closing paren for binding label at %C"); | |
5283 | return MATCH_ERROR; | |
5284 | } | |
5285 | ||
1eabf70a TB |
5286 | if (has_name_equals && !allow_binding_name) |
5287 | { | |
5288 | gfc_error ("No binding name is allowed in BIND(C) at %C"); | |
5289 | return MATCH_ERROR; | |
5290 | } | |
5291 | ||
5292 | if (has_name_equals && sym != NULL && sym->attr.dummy) | |
5293 | { | |
5294 | gfc_error ("For dummy procedure %s, no binding name is " | |
5295 | "allowed in BIND(C) at %C", sym->name); | |
5296 | return MATCH_ERROR; | |
5297 | } | |
5298 | ||
5299 | ||
a8b3b0b6 CR |
5300 | /* Save the binding label to the symbol. If sym is null, we're |
5301 | probably matching the typespec attributes of a declaration and | |
5302 | haven't gotten the name yet, and therefore, no symbol yet. */ | |
5303 | if (binding_label[0] != '\0') | |
5304 | { | |
5305 | if (sym != NULL) | |
5306 | { | |
c5b5a17a | 5307 | strcpy (sym->binding_label, binding_label); |
a8b3b0b6 CR |
5308 | } |
5309 | else | |
c5b5a17a | 5310 | strcpy (curr_binding_label, binding_label); |
a8b3b0b6 | 5311 | } |
1eabf70a | 5312 | else if (allow_binding_name) |
a8b3b0b6 CR |
5313 | { |
5314 | /* No binding label, but if symbol isn't null, we | |
1eabf70a TB |
5315 | can set the label for it here. |
5316 | If name="" or allow_binding_name is false, no C binding name is | |
5317 | created. */ | |
a8b3b0b6 CR |
5318 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) |
5319 | strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1); | |
5320 | } | |
9e1d712c | 5321 | |
129d15a3 JW |
5322 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
5323 | && current_interface.type == INTERFACE_ABSTRACT) | |
9e1d712c TB |
5324 | { |
5325 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); | |
5326 | return MATCH_ERROR; | |
5327 | } | |
5328 | ||
a8b3b0b6 CR |
5329 | return MATCH_YES; |
5330 | } | |
5331 | ||
5332 | ||
1f2959f0 | 5333 | /* Return nonzero if we're currently compiling a contained procedure. */ |
ddc9ce91 TS |
5334 | |
5335 | static int | |
5336 | contained_procedure (void) | |
5337 | { | |
083de129 | 5338 | gfc_state_data *s = gfc_state_stack; |
ddc9ce91 | 5339 | |
083de129 TB |
5340 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) |
5341 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) | |
5342 | return 1; | |
ddc9ce91 TS |
5343 | |
5344 | return 0; | |
5345 | } | |
5346 | ||
d51347f9 | 5347 | /* Set the kind of each enumerator. The kind is selected such that it is |
25d8f0a2 TS |
5348 | interoperable with the corresponding C enumeration type, making |
5349 | sure that -fshort-enums is honored. */ | |
5350 | ||
5351 | static void | |
5352 | set_enum_kind(void) | |
5353 | { | |
5354 | enumerator_history *current_history = NULL; | |
5355 | int kind; | |
5356 | int i; | |
5357 | ||
5358 | if (max_enum == NULL || enum_history == NULL) | |
5359 | return; | |
5360 | ||
cab129d1 | 5361 | if (!flag_short_enums) |
d51347f9 TB |
5362 | return; |
5363 | ||
25d8f0a2 TS |
5364 | i = 0; |
5365 | do | |
5366 | { | |
5367 | kind = gfc_integer_kinds[i++].kind; | |
5368 | } | |
d51347f9 | 5369 | while (kind < gfc_c_int_kind |
25d8f0a2 TS |
5370 | && gfc_check_integer_range (max_enum->initializer->value.integer, |
5371 | kind) != ARITH_OK); | |
5372 | ||
5373 | current_history = enum_history; | |
5374 | while (current_history != NULL) | |
5375 | { | |
5376 | current_history->sym->ts.kind = kind; | |
5377 | current_history = current_history->next; | |
5378 | } | |
5379 | } | |
5380 | ||
636dff67 | 5381 | |
6de9cd9a | 5382 | /* Match any of the various end-block statements. Returns the type of |
9abe5e56 DK |
5383 | END to the caller. The END INTERFACE, END IF, END DO, END SELECT |
5384 | and END BLOCK statements cannot be replaced by a single END statement. */ | |
6de9cd9a DN |
5385 | |
5386 | match | |
636dff67 | 5387 | gfc_match_end (gfc_statement *st) |
6de9cd9a DN |
5388 | { |
5389 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5390 | gfc_compile_state state; | |
5391 | locus old_loc; | |
5392 | const char *block_name; | |
5393 | const char *target; | |
ddc9ce91 | 5394 | int eos_ok; |
6de9cd9a DN |
5395 | match m; |
5396 | ||
63645982 | 5397 | old_loc = gfc_current_locus; |
6de9cd9a DN |
5398 | if (gfc_match ("end") != MATCH_YES) |
5399 | return MATCH_NO; | |
5400 | ||
5401 | state = gfc_current_state (); | |
636dff67 SK |
5402 | block_name = gfc_current_block () == NULL |
5403 | ? NULL : gfc_current_block ()->name; | |
6de9cd9a | 5404 | |
9abe5e56 DK |
5405 | if (state == COMP_BLOCK && !strcmp (block_name, "block@")) |
5406 | block_name = NULL; | |
5407 | ||
30b608eb | 5408 | if (state == COMP_CONTAINS || state == COMP_DERIVED_CONTAINS) |
6de9cd9a DN |
5409 | { |
5410 | state = gfc_state_stack->previous->state; | |
636dff67 SK |
5411 | block_name = gfc_state_stack->previous->sym == NULL |
5412 | ? NULL : gfc_state_stack->previous->sym->name; | |
6de9cd9a DN |
5413 | } |
5414 | ||
5415 | switch (state) | |
5416 | { | |
5417 | case COMP_NONE: | |
5418 | case COMP_PROGRAM: | |
5419 | *st = ST_END_PROGRAM; | |
5420 | target = " program"; | |
ddc9ce91 | 5421 | eos_ok = 1; |
6de9cd9a DN |
5422 | break; |
5423 | ||
5424 | case COMP_SUBROUTINE: | |
5425 | *st = ST_END_SUBROUTINE; | |
5426 | target = " subroutine"; | |
ddc9ce91 | 5427 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
5428 | break; |
5429 | ||
5430 | case COMP_FUNCTION: | |
5431 | *st = ST_END_FUNCTION; | |
5432 | target = " function"; | |
ddc9ce91 | 5433 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
5434 | break; |
5435 | ||
5436 | case COMP_BLOCK_DATA: | |
5437 | *st = ST_END_BLOCK_DATA; | |
5438 | target = " block data"; | |
ddc9ce91 | 5439 | eos_ok = 1; |
6de9cd9a DN |
5440 | break; |
5441 | ||
5442 | case COMP_MODULE: | |
5443 | *st = ST_END_MODULE; | |
5444 | target = " module"; | |
ddc9ce91 | 5445 | eos_ok = 1; |
6de9cd9a DN |
5446 | break; |
5447 | ||
5448 | case COMP_INTERFACE: | |
5449 | *st = ST_END_INTERFACE; | |
5450 | target = " interface"; | |
ddc9ce91 | 5451 | eos_ok = 0; |
6de9cd9a DN |
5452 | break; |
5453 | ||
5454 | case COMP_DERIVED: | |
30b608eb | 5455 | case COMP_DERIVED_CONTAINS: |
6de9cd9a DN |
5456 | *st = ST_END_TYPE; |
5457 | target = " type"; | |
ddc9ce91 | 5458 | eos_ok = 0; |
6de9cd9a DN |
5459 | break; |
5460 | ||
9abe5e56 DK |
5461 | case COMP_BLOCK: |
5462 | *st = ST_END_BLOCK; | |
5463 | target = " block"; | |
5464 | eos_ok = 0; | |
5465 | break; | |
5466 | ||
6de9cd9a DN |
5467 | case COMP_IF: |
5468 | *st = ST_ENDIF; | |
5469 | target = " if"; | |
ddc9ce91 | 5470 | eos_ok = 0; |
6de9cd9a DN |
5471 | break; |
5472 | ||
5473 | case COMP_DO: | |
5474 | *st = ST_ENDDO; | |
5475 | target = " do"; | |
ddc9ce91 | 5476 | eos_ok = 0; |
6de9cd9a DN |
5477 | break; |
5478 | ||
5479 | case COMP_SELECT: | |
cf2b3c22 | 5480 | case COMP_SELECT_TYPE: |
6de9cd9a DN |
5481 | *st = ST_END_SELECT; |
5482 | target = " select"; | |
ddc9ce91 | 5483 | eos_ok = 0; |
6de9cd9a DN |
5484 | break; |
5485 | ||
5486 | case COMP_FORALL: | |
5487 | *st = ST_END_FORALL; | |
5488 | target = " forall"; | |
ddc9ce91 | 5489 | eos_ok = 0; |
6de9cd9a DN |
5490 | break; |
5491 | ||
5492 | case COMP_WHERE: | |
5493 | *st = ST_END_WHERE; | |
5494 | target = " where"; | |
ddc9ce91 | 5495 | eos_ok = 0; |
6de9cd9a DN |
5496 | break; |
5497 | ||
25d8f0a2 TS |
5498 | case COMP_ENUM: |
5499 | *st = ST_END_ENUM; | |
5500 | target = " enum"; | |
5501 | eos_ok = 0; | |
5502 | last_initializer = NULL; | |
5503 | set_enum_kind (); | |
5504 | gfc_free_enum_history (); | |
5505 | break; | |
5506 | ||
6de9cd9a DN |
5507 | default: |
5508 | gfc_error ("Unexpected END statement at %C"); | |
5509 | goto cleanup; | |
5510 | } | |
5511 | ||
5512 | if (gfc_match_eos () == MATCH_YES) | |
5513 | { | |
ddc9ce91 | 5514 | if (!eos_ok) |
6de9cd9a | 5515 | { |
66e4ab31 | 5516 | /* We would have required END [something]. */ |
59ce85b5 TS |
5517 | gfc_error ("%s statement expected at %L", |
5518 | gfc_ascii_statement (*st), &old_loc); | |
6de9cd9a DN |
5519 | goto cleanup; |
5520 | } | |
5521 | ||
5522 | return MATCH_YES; | |
5523 | } | |
5524 | ||
5525 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
5526 | if (gfc_match (target) != MATCH_YES) | |
5527 | { | |
5528 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
5529 | goto cleanup; | |
5530 | } | |
5531 | ||
5532 | /* If we're at the end, make sure a block name wasn't required. */ | |
5533 | if (gfc_match_eos () == MATCH_YES) | |
5534 | { | |
5535 | ||
690af379 | 5536 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT |
9abe5e56 | 5537 | && *st != ST_END_FORALL && *st != ST_END_WHERE && *st != ST_END_BLOCK) |
6de9cd9a DN |
5538 | return MATCH_YES; |
5539 | ||
9abe5e56 | 5540 | if (!block_name) |
6de9cd9a DN |
5541 | return MATCH_YES; |
5542 | ||
5543 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
5544 | block_name, gfc_ascii_statement (*st)); | |
5545 | ||
5546 | return MATCH_ERROR; | |
5547 | } | |
5548 | ||
5549 | /* END INTERFACE has a special handler for its several possible endings. */ | |
5550 | if (*st == ST_END_INTERFACE) | |
5551 | return gfc_match_end_interface (); | |
5552 | ||
66e4ab31 SK |
5553 | /* We haven't hit the end of statement, so what is left must be an |
5554 | end-name. */ | |
6de9cd9a DN |
5555 | m = gfc_match_space (); |
5556 | if (m == MATCH_YES) | |
5557 | m = gfc_match_name (name); | |
5558 | ||
5559 | if (m == MATCH_NO) | |
5560 | gfc_error ("Expected terminating name at %C"); | |
5561 | if (m != MATCH_YES) | |
5562 | goto cleanup; | |
5563 | ||
5564 | if (block_name == NULL) | |
5565 | goto syntax; | |
5566 | ||
3070bab4 | 5567 | if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0) |
6de9cd9a DN |
5568 | { |
5569 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
5570 | gfc_ascii_statement (*st)); | |
5571 | goto cleanup; | |
5572 | } | |
3070bab4 JW |
5573 | /* Procedure pointer as function result. */ |
5574 | else if (strcmp (block_name, "ppr@") == 0 | |
5575 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0) | |
5576 | { | |
5577 | gfc_error ("Expected label '%s' for %s statement at %C", | |
5578 | gfc_current_block ()->ns->proc_name->name, | |
5579 | gfc_ascii_statement (*st)); | |
5580 | goto cleanup; | |
5581 | } | |
6de9cd9a DN |
5582 | |
5583 | if (gfc_match_eos () == MATCH_YES) | |
5584 | return MATCH_YES; | |
5585 | ||
5586 | syntax: | |
5587 | gfc_syntax_error (*st); | |
5588 | ||
5589 | cleanup: | |
63645982 | 5590 | gfc_current_locus = old_loc; |
6de9cd9a DN |
5591 | return MATCH_ERROR; |
5592 | } | |
5593 | ||
5594 | ||
5595 | ||
5596 | /***************** Attribute declaration statements ****************/ | |
5597 | ||
5598 | /* Set the attribute of a single variable. */ | |
5599 | ||
5600 | static match | |
5601 | attr_decl1 (void) | |
5602 | { | |
5603 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5604 | gfc_array_spec *as; | |
5605 | gfc_symbol *sym; | |
5606 | locus var_locus; | |
5607 | match m; | |
5608 | ||
5609 | as = NULL; | |
5610 | ||
5611 | m = gfc_match_name (name); | |
5612 | if (m != MATCH_YES) | |
5613 | goto cleanup; | |
5614 | ||
08a6b8e0 | 5615 | if (find_special (name, &sym, false)) |
6de9cd9a DN |
5616 | return MATCH_ERROR; |
5617 | ||
63645982 | 5618 | var_locus = gfc_current_locus; |
6de9cd9a DN |
5619 | |
5620 | /* Deal with possible array specification for certain attributes. */ | |
5621 | if (current_attr.dimension | |
5622 | || current_attr.allocatable | |
5623 | || current_attr.pointer | |
5624 | || current_attr.target) | |
5625 | { | |
5626 | m = gfc_match_array_spec (&as); | |
5627 | if (m == MATCH_ERROR) | |
5628 | goto cleanup; | |
5629 | ||
5630 | if (current_attr.dimension && m == MATCH_NO) | |
5631 | { | |
636dff67 SK |
5632 | gfc_error ("Missing array specification at %L in DIMENSION " |
5633 | "statement", &var_locus); | |
6de9cd9a DN |
5634 | m = MATCH_ERROR; |
5635 | goto cleanup; | |
5636 | } | |
5637 | ||
1283ab12 TB |
5638 | if (current_attr.dimension && sym->value) |
5639 | { | |
5640 | gfc_error ("Dimensions specified for %s at %L after its " | |
5641 | "initialisation", sym->name, &var_locus); | |
5642 | m = MATCH_ERROR; | |
5643 | goto cleanup; | |
5644 | } | |
5645 | ||
6de9cd9a DN |
5646 | if ((current_attr.allocatable || current_attr.pointer) |
5647 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
5648 | { | |
636dff67 | 5649 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
6de9cd9a DN |
5650 | m = MATCH_ERROR; |
5651 | goto cleanup; | |
5652 | } | |
5653 | } | |
5654 | ||
2e23972e JW |
5655 | /* Update symbol table. DIMENSION attribute is set in |
5656 | gfc_set_array_spec(). For CLASS variables, this must be applied | |
5657 | to the first component, or '$data' field. */ | |
5658 | if (sym->ts.type == BT_CLASS && sym->ts.u.derived) | |
6de9cd9a | 5659 | { |
2e23972e JW |
5660 | gfc_component *comp; |
5661 | comp = gfc_find_component (sym->ts.u.derived, "$data", true, true); | |
5662 | if (comp == NULL || gfc_copy_attr (&comp->attr, ¤t_attr, | |
5663 | &var_locus) == FAILURE) | |
5664 | { | |
5665 | m = MATCH_ERROR; | |
5666 | goto cleanup; | |
5667 | } | |
5668 | sym->attr.class_ok = (sym->attr.class_ok | |
5669 | || current_attr.allocatable | |
5670 | || current_attr.pointer); | |
5671 | } | |
5672 | else | |
5673 | { | |
5674 | if (current_attr.dimension == 0 | |
5675 | && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE) | |
5676 | { | |
5677 | m = MATCH_ERROR; | |
5678 | goto cleanup; | |
5679 | } | |
6de9cd9a DN |
5680 | } |
5681 | ||
5682 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
5683 | { | |
5684 | m = MATCH_ERROR; | |
5685 | goto cleanup; | |
5686 | } | |
d51347f9 | 5687 | |
83d890b9 AL |
5688 | if (sym->attr.cray_pointee && sym->as != NULL) |
5689 | { | |
5690 | /* Fix the array spec. */ | |
5691 | m = gfc_mod_pointee_as (sym->as); | |
5692 | if (m == MATCH_ERROR) | |
5693 | goto cleanup; | |
5694 | } | |
6de9cd9a | 5695 | |
7114edca | 5696 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
1902704e PT |
5697 | { |
5698 | m = MATCH_ERROR; | |
5699 | goto cleanup; | |
5700 | } | |
5701 | ||
6de9cd9a DN |
5702 | if ((current_attr.external || current_attr.intrinsic) |
5703 | && sym->attr.flavor != FL_PROCEDURE | |
231b2fcc | 5704 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
5705 | { |
5706 | m = MATCH_ERROR; | |
5707 | goto cleanup; | |
5708 | } | |
5709 | ||
3070bab4 JW |
5710 | add_hidden_procptr_result (sym); |
5711 | ||
6de9cd9a DN |
5712 | return MATCH_YES; |
5713 | ||
5714 | cleanup: | |
5715 | gfc_free_array_spec (as); | |
5716 | return m; | |
5717 | } | |
5718 | ||
5719 | ||
5720 | /* Generic attribute declaration subroutine. Used for attributes that | |
5721 | just have a list of names. */ | |
5722 | ||
5723 | static match | |
5724 | attr_decl (void) | |
5725 | { | |
5726 | match m; | |
5727 | ||
5728 | /* Gobble the optional double colon, by simply ignoring the result | |
5729 | of gfc_match(). */ | |
5730 | gfc_match (" ::"); | |
5731 | ||
5732 | for (;;) | |
5733 | { | |
5734 | m = attr_decl1 (); | |
5735 | if (m != MATCH_YES) | |
5736 | break; | |
5737 | ||
5738 | if (gfc_match_eos () == MATCH_YES) | |
5739 | { | |
5740 | m = MATCH_YES; | |
5741 | break; | |
5742 | } | |
5743 | ||
5744 | if (gfc_match_char (',') != MATCH_YES) | |
5745 | { | |
5746 | gfc_error ("Unexpected character in variable list at %C"); | |
5747 | m = MATCH_ERROR; | |
5748 | break; | |
5749 | } | |
5750 | } | |
5751 | ||
5752 | return m; | |
5753 | } | |
5754 | ||
5755 | ||
83d890b9 AL |
5756 | /* This routine matches Cray Pointer declarations of the form: |
5757 | pointer ( <pointer>, <pointee> ) | |
5758 | or | |
d51347f9 TB |
5759 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
5760 | The pointer, if already declared, should be an integer. Otherwise, we | |
83d890b9 AL |
5761 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
5762 | be either a scalar, or an array declaration. No space is allocated for | |
d51347f9 | 5763 | the pointee. For the statement |
83d890b9 AL |
5764 | pointer (ipt, ar(10)) |
5765 | any subsequent uses of ar will be translated (in C-notation) as | |
d51347f9 | 5766 | ar(i) => ((<type> *) ipt)(i) |
b122dc6a | 5767 | After gimplification, pointee variable will disappear in the code. */ |
83d890b9 AL |
5768 | |
5769 | static match | |
5770 | cray_pointer_decl (void) | |
5771 | { | |
5772 | match m; | |
5773 | gfc_array_spec *as; | |
5774 | gfc_symbol *cptr; /* Pointer symbol. */ | |
5775 | gfc_symbol *cpte; /* Pointee symbol. */ | |
5776 | locus var_locus; | |
5777 | bool done = false; | |
5778 | ||
5779 | while (!done) | |
5780 | { | |
5781 | if (gfc_match_char ('(') != MATCH_YES) | |
5782 | { | |
5783 | gfc_error ("Expected '(' at %C"); | |
d51347f9 | 5784 | return MATCH_ERROR; |
83d890b9 | 5785 | } |
d51347f9 | 5786 | |
83d890b9 AL |
5787 | /* Match pointer. */ |
5788 | var_locus = gfc_current_locus; | |
5789 | gfc_clear_attr (¤t_attr); | |
5790 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
5791 | current_ts.type = BT_INTEGER; | |
5792 | current_ts.kind = gfc_index_integer_kind; | |
5793 | ||
d51347f9 | 5794 | m = gfc_match_symbol (&cptr, 0); |
83d890b9 AL |
5795 | if (m != MATCH_YES) |
5796 | { | |
5797 | gfc_error ("Expected variable name at %C"); | |
5798 | return m; | |
5799 | } | |
d51347f9 | 5800 | |
83d890b9 AL |
5801 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) |
5802 | return MATCH_ERROR; | |
5803 | ||
d51347f9 | 5804 | gfc_set_sym_referenced (cptr); |
83d890b9 AL |
5805 | |
5806 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
5807 | { | |
5808 | cptr->ts.type = BT_INTEGER; | |
d51347f9 | 5809 | cptr->ts.kind = gfc_index_integer_kind; |
83d890b9 AL |
5810 | } |
5811 | else if (cptr->ts.type != BT_INTEGER) | |
5812 | { | |
e25a0da3 | 5813 | gfc_error ("Cray pointer at %C must be an integer"); |
83d890b9 AL |
5814 | return MATCH_ERROR; |
5815 | } | |
5816 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
5817 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
e25a0da3 | 5818 | " memory addresses require %d bytes", |
636dff67 | 5819 | cptr->ts.kind, gfc_index_integer_kind); |
83d890b9 AL |
5820 | |
5821 | if (gfc_match_char (',') != MATCH_YES) | |
5822 | { | |
5823 | gfc_error ("Expected \",\" at %C"); | |
d51347f9 | 5824 | return MATCH_ERROR; |
83d890b9 AL |
5825 | } |
5826 | ||
d51347f9 | 5827 | /* Match Pointee. */ |
83d890b9 AL |
5828 | var_locus = gfc_current_locus; |
5829 | gfc_clear_attr (¤t_attr); | |
5830 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
5831 | current_ts.type = BT_UNKNOWN; | |
5832 | current_ts.kind = 0; | |
5833 | ||
5834 | m = gfc_match_symbol (&cpte, 0); | |
5835 | if (m != MATCH_YES) | |
5836 | { | |
5837 | gfc_error ("Expected variable name at %C"); | |
5838 | return m; | |
5839 | } | |
d51347f9 | 5840 | |
83d890b9 AL |
5841 | /* Check for an optional array spec. */ |
5842 | m = gfc_match_array_spec (&as); | |
5843 | if (m == MATCH_ERROR) | |
5844 | { | |
5845 | gfc_free_array_spec (as); | |
5846 | return m; | |
5847 | } | |
5848 | else if (m == MATCH_NO) | |
5849 | { | |
5850 | gfc_free_array_spec (as); | |
5851 | as = NULL; | |
5852 | } | |
5853 | ||
5854 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
5855 | return MATCH_ERROR; | |
5856 | ||
5857 | gfc_set_sym_referenced (cpte); | |
5858 | ||
5859 | if (cpte->as == NULL) | |
5860 | { | |
5861 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
5862 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
5863 | } | |
5864 | else if (as != NULL) | |
5865 | { | |
e25a0da3 | 5866 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
83d890b9 AL |
5867 | gfc_free_array_spec (as); |
5868 | return MATCH_ERROR; | |
5869 | } | |
5870 | ||
5871 | as = NULL; | |
5872 | ||
5873 | if (cpte->as != NULL) | |
5874 | { | |
5875 | /* Fix array spec. */ | |
5876 | m = gfc_mod_pointee_as (cpte->as); | |
5877 | if (m == MATCH_ERROR) | |
5878 | return m; | |
5879 | } | |
5880 | ||
5881 | /* Point the Pointee at the Pointer. */ | |
b122dc6a | 5882 | cpte->cp_pointer = cptr; |
83d890b9 AL |
5883 | |
5884 | if (gfc_match_char (')') != MATCH_YES) | |
5885 | { | |
5886 | gfc_error ("Expected \")\" at %C"); | |
5887 | return MATCH_ERROR; | |
5888 | } | |
5889 | m = gfc_match_char (','); | |
5890 | if (m != MATCH_YES) | |
5891 | done = true; /* Stop searching for more declarations. */ | |
5892 | ||
5893 | } | |
5894 | ||
5895 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
5896 | || gfc_match_eos () != MATCH_YES) | |
5897 | { | |
5898 | gfc_error ("Expected \",\" or end of statement at %C"); | |
5899 | return MATCH_ERROR; | |
5900 | } | |
5901 | return MATCH_YES; | |
5902 | } | |
5903 | ||
5904 | ||
6de9cd9a DN |
5905 | match |
5906 | gfc_match_external (void) | |
5907 | { | |
5908 | ||
5909 | gfc_clear_attr (¤t_attr); | |
1902704e | 5910 | current_attr.external = 1; |
6de9cd9a DN |
5911 | |
5912 | return attr_decl (); | |
5913 | } | |
5914 | ||
5915 | ||
6de9cd9a DN |
5916 | match |
5917 | gfc_match_intent (void) | |
5918 | { | |
5919 | sym_intent intent; | |
5920 | ||
9abe5e56 DK |
5921 | /* This is not allowed within a BLOCK construct! */ |
5922 | if (gfc_current_state () == COMP_BLOCK) | |
5923 | { | |
5924 | gfc_error ("INTENT is not allowed inside of BLOCK at %C"); | |
5925 | return MATCH_ERROR; | |
5926 | } | |
5927 | ||
6de9cd9a DN |
5928 | intent = match_intent_spec (); |
5929 | if (intent == INTENT_UNKNOWN) | |
5930 | return MATCH_ERROR; | |
5931 | ||
5932 | gfc_clear_attr (¤t_attr); | |
1902704e | 5933 | current_attr.intent = intent; |
6de9cd9a DN |
5934 | |
5935 | return attr_decl (); | |
5936 | } | |
5937 | ||
5938 | ||
5939 | match | |
5940 | gfc_match_intrinsic (void) | |
5941 | { | |
5942 | ||
5943 | gfc_clear_attr (¤t_attr); | |
1902704e | 5944 | current_attr.intrinsic = 1; |
6de9cd9a DN |
5945 | |
5946 | return attr_decl (); | |
5947 | } | |
5948 | ||
5949 | ||
5950 | match | |
5951 | gfc_match_optional (void) | |
5952 | { | |
9abe5e56 DK |
5953 | /* This is not allowed within a BLOCK construct! */ |
5954 | if (gfc_current_state () == COMP_BLOCK) | |
5955 | { | |
5956 | gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C"); | |
5957 | return MATCH_ERROR; | |
5958 | } | |
6de9cd9a DN |
5959 | |
5960 | gfc_clear_attr (¤t_attr); | |
1902704e | 5961 | current_attr.optional = 1; |
6de9cd9a DN |
5962 | |
5963 | return attr_decl (); | |
5964 | } | |
5965 | ||
5966 | ||
5967 | match | |
5968 | gfc_match_pointer (void) | |
5969 | { | |
83d890b9 | 5970 | gfc_gobble_whitespace (); |
8fc541d3 | 5971 | if (gfc_peek_ascii_char () == '(') |
83d890b9 AL |
5972 | { |
5973 | if (!gfc_option.flag_cray_pointer) | |
5974 | { | |
636dff67 SK |
5975 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
5976 | "flag"); | |
83d890b9 AL |
5977 | return MATCH_ERROR; |
5978 | } | |
5979 | return cray_pointer_decl (); | |
5980 | } | |
5981 | else | |
5982 | { | |
5983 | gfc_clear_attr (¤t_attr); | |
1902704e | 5984 | current_attr.pointer = 1; |
83d890b9 AL |
5985 | |
5986 | return attr_decl (); | |
5987 | } | |
6de9cd9a DN |
5988 | } |
5989 | ||
5990 | ||
5991 | match | |
5992 | gfc_match_allocatable (void) | |
5993 | { | |
6de9cd9a | 5994 | gfc_clear_attr (¤t_attr); |
1902704e | 5995 | current_attr.allocatable = 1; |
6de9cd9a DN |
5996 | |
5997 | return attr_decl (); | |
5998 | } | |
5999 | ||
6000 | ||
6001 | match | |
6002 | gfc_match_dimension (void) | |
6003 | { | |
6de9cd9a | 6004 | gfc_clear_attr (¤t_attr); |
1902704e | 6005 | current_attr.dimension = 1; |
6de9cd9a DN |
6006 | |
6007 | return attr_decl (); | |
6008 | } | |
6009 | ||
6010 | ||
6011 | match | |
6012 | gfc_match_target (void) | |
6013 | { | |
6de9cd9a | 6014 | gfc_clear_attr (¤t_attr); |
1902704e | 6015 | current_attr.target = 1; |
6de9cd9a DN |
6016 | |
6017 | return attr_decl (); | |
6018 | } | |
6019 | ||
6020 | ||
6021 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
6022 | statement. */ | |
6023 | ||
6024 | static match | |
6025 | access_attr_decl (gfc_statement st) | |
6026 | { | |
6027 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6028 | interface_type type; | |
6029 | gfc_user_op *uop; | |
6030 | gfc_symbol *sym; | |
a1ee985f | 6031 | gfc_intrinsic_op op; |
6de9cd9a DN |
6032 | match m; |
6033 | ||
6034 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6035 | goto done; | |
6036 | ||
6037 | for (;;) | |
6038 | { | |
a1ee985f | 6039 | m = gfc_match_generic_spec (&type, name, &op); |
6de9cd9a DN |
6040 | if (m == MATCH_NO) |
6041 | goto syntax; | |
6042 | if (m == MATCH_ERROR) | |
6043 | return MATCH_ERROR; | |
6044 | ||
6045 | switch (type) | |
6046 | { | |
6047 | case INTERFACE_NAMELESS: | |
9e1d712c | 6048 | case INTERFACE_ABSTRACT: |
6de9cd9a DN |
6049 | goto syntax; |
6050 | ||
6051 | case INTERFACE_GENERIC: | |
6052 | if (gfc_get_symbol (name, NULL, &sym)) | |
6053 | goto done; | |
6054 | ||
636dff67 SK |
6055 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
6056 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
231b2fcc | 6057 | sym->name, NULL) == FAILURE) |
6de9cd9a DN |
6058 | return MATCH_ERROR; |
6059 | ||
6060 | break; | |
6061 | ||
6062 | case INTERFACE_INTRINSIC_OP: | |
a1ee985f | 6063 | if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN) |
6de9cd9a | 6064 | { |
a1ee985f | 6065 | gfc_current_ns->operator_access[op] = |
6de9cd9a DN |
6066 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; |
6067 | } | |
6068 | else | |
6069 | { | |
6070 | gfc_error ("Access specification of the %s operator at %C has " | |
a1ee985f | 6071 | "already been specified", gfc_op2string (op)); |
6de9cd9a DN |
6072 | goto done; |
6073 | } | |
6074 | ||
6075 | break; | |
6076 | ||
6077 | case INTERFACE_USER_OP: | |
6078 | uop = gfc_get_uop (name); | |
6079 | ||
6080 | if (uop->access == ACCESS_UNKNOWN) | |
6081 | { | |
636dff67 SK |
6082 | uop->access = (st == ST_PUBLIC) |
6083 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
6de9cd9a DN |
6084 | } |
6085 | else | |
6086 | { | |
636dff67 SK |
6087 | gfc_error ("Access specification of the .%s. operator at %C " |
6088 | "has already been specified", sym->name); | |
6de9cd9a DN |
6089 | goto done; |
6090 | } | |
6091 | ||
6092 | break; | |
6093 | } | |
6094 | ||
6095 | if (gfc_match_char (',') == MATCH_NO) | |
6096 | break; | |
6097 | } | |
6098 | ||
6099 | if (gfc_match_eos () != MATCH_YES) | |
6100 | goto syntax; | |
6101 | return MATCH_YES; | |
6102 | ||
6103 | syntax: | |
6104 | gfc_syntax_error (st); | |
6105 | ||
6106 | done: | |
6107 | return MATCH_ERROR; | |
6108 | } | |
6109 | ||
6110 | ||
ee7e677f TB |
6111 | match |
6112 | gfc_match_protected (void) | |
6113 | { | |
6114 | gfc_symbol *sym; | |
6115 | match m; | |
6116 | ||
6117 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
6118 | { | |
6119 | gfc_error ("PROTECTED at %C only allowed in specification " | |
6120 | "part of a module"); | |
6121 | return MATCH_ERROR; | |
6122 | ||
6123 | } | |
6124 | ||
636dff67 | 6125 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
ee7e677f TB |
6126 | == FAILURE) |
6127 | return MATCH_ERROR; | |
6128 | ||
6129 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6130 | { | |
6131 | return MATCH_ERROR; | |
6132 | } | |
6133 | ||
6134 | if (gfc_match_eos () == MATCH_YES) | |
6135 | goto syntax; | |
6136 | ||
6137 | for(;;) | |
6138 | { | |
6139 | m = gfc_match_symbol (&sym, 0); | |
6140 | switch (m) | |
6141 | { | |
6142 | case MATCH_YES: | |
636dff67 SK |
6143 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
6144 | == FAILURE) | |
ee7e677f TB |
6145 | return MATCH_ERROR; |
6146 | goto next_item; | |
6147 | ||
6148 | case MATCH_NO: | |
6149 | break; | |
6150 | ||
6151 | case MATCH_ERROR: | |
6152 | return MATCH_ERROR; | |
6153 | } | |
6154 | ||
6155 | next_item: | |
6156 | if (gfc_match_eos () == MATCH_YES) | |
6157 | break; | |
6158 | if (gfc_match_char (',') != MATCH_YES) | |
6159 | goto syntax; | |
6160 | } | |
6161 | ||
6162 | return MATCH_YES; | |
6163 | ||
6164 | syntax: | |
6165 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
6166 | return MATCH_ERROR; | |
6167 | } | |
6168 | ||
6169 | ||
86bf520d | 6170 | /* The PRIVATE statement is a bit weird in that it can be an attribute |
df2fba9e | 6171 | declaration, but also works as a standalone statement inside of a |
6de9cd9a DN |
6172 | type declaration or a module. */ |
6173 | ||
6174 | match | |
636dff67 | 6175 | gfc_match_private (gfc_statement *st) |
6de9cd9a DN |
6176 | { |
6177 | ||
6178 | if (gfc_match ("private") != MATCH_YES) | |
6179 | return MATCH_NO; | |
6180 | ||
d51347f9 | 6181 | if (gfc_current_state () != COMP_MODULE |
30b608eb DK |
6182 | && !(gfc_current_state () == COMP_DERIVED |
6183 | && gfc_state_stack->previous | |
6184 | && gfc_state_stack->previous->state == COMP_MODULE) | |
6185 | && !(gfc_current_state () == COMP_DERIVED_CONTAINS | |
6186 | && gfc_state_stack->previous && gfc_state_stack->previous->previous | |
6187 | && gfc_state_stack->previous->previous->state == COMP_MODULE)) | |
d51347f9 TB |
6188 | { |
6189 | gfc_error ("PRIVATE statement at %C is only allowed in the " | |
6190 | "specification part of a module"); | |
6191 | return MATCH_ERROR; | |
6192 | } | |
6193 | ||
6de9cd9a DN |
6194 | if (gfc_current_state () == COMP_DERIVED) |
6195 | { | |
6196 | if (gfc_match_eos () == MATCH_YES) | |
6197 | { | |
6198 | *st = ST_PRIVATE; | |
6199 | return MATCH_YES; | |
6200 | } | |
6201 | ||
6202 | gfc_syntax_error (ST_PRIVATE); | |
6203 | return MATCH_ERROR; | |
6204 | } | |
6205 | ||
6206 | if (gfc_match_eos () == MATCH_YES) | |
6207 | { | |
6208 | *st = ST_PRIVATE; | |
6209 | return MATCH_YES; | |
6210 | } | |
6211 | ||
6212 | *st = ST_ATTR_DECL; | |
6213 | return access_attr_decl (ST_PRIVATE); | |
6214 | } | |
6215 | ||
6216 | ||
6217 | match | |
636dff67 | 6218 | gfc_match_public (gfc_statement *st) |
6de9cd9a DN |
6219 | { |
6220 | ||
6221 | if (gfc_match ("public") != MATCH_YES) | |
6222 | return MATCH_NO; | |
6223 | ||
d51347f9 TB |
6224 | if (gfc_current_state () != COMP_MODULE) |
6225 | { | |
6226 | gfc_error ("PUBLIC statement at %C is only allowed in the " | |
6227 | "specification part of a module"); | |
6228 | return MATCH_ERROR; | |
6229 | } | |
6230 | ||
6de9cd9a DN |
6231 | if (gfc_match_eos () == MATCH_YES) |
6232 | { | |
6233 | *st = ST_PUBLIC; | |
6234 | return MATCH_YES; | |
6235 | } | |
6236 | ||
6237 | *st = ST_ATTR_DECL; | |
6238 | return access_attr_decl (ST_PUBLIC); | |
6239 | } | |
6240 | ||
6241 | ||
6242 | /* Workhorse for gfc_match_parameter. */ | |
6243 | ||
6244 | static match | |
6245 | do_parm (void) | |
6246 | { | |
6247 | gfc_symbol *sym; | |
6248 | gfc_expr *init; | |
6249 | match m; | |
7919373d | 6250 | gfc_try t; |
6de9cd9a DN |
6251 | |
6252 | m = gfc_match_symbol (&sym, 0); | |
6253 | if (m == MATCH_NO) | |
6254 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
6255 | ||
6256 | if (m != MATCH_YES) | |
6257 | return m; | |
6258 | ||
6259 | if (gfc_match_char ('=') == MATCH_NO) | |
6260 | { | |
6261 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
6262 | return MATCH_ERROR; | |
6263 | } | |
6264 | ||
6265 | m = gfc_match_init_expr (&init); | |
6266 | if (m == MATCH_NO) | |
6267 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
6268 | if (m != MATCH_YES) | |
6269 | return m; | |
6270 | ||
6271 | if (sym->ts.type == BT_UNKNOWN | |
6272 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
6273 | { | |
6274 | m = MATCH_ERROR; | |
6275 | goto cleanup; | |
6276 | } | |
6277 | ||
6278 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
231b2fcc | 6279 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
6280 | { |
6281 | m = MATCH_ERROR; | |
6282 | goto cleanup; | |
6283 | } | |
6284 | ||
1283ab12 TB |
6285 | if (sym->value) |
6286 | { | |
6287 | gfc_error ("Initializing already initialized variable at %C"); | |
6288 | m = MATCH_ERROR; | |
6289 | goto cleanup; | |
6290 | } | |
6291 | ||
7919373d TB |
6292 | t = add_init_expr_to_sym (sym->name, &init, &gfc_current_locus); |
6293 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
6de9cd9a DN |
6294 | |
6295 | cleanup: | |
6296 | gfc_free_expr (init); | |
6297 | return m; | |
6298 | } | |
6299 | ||
6300 | ||
6301 | /* Match a parameter statement, with the weird syntax that these have. */ | |
6302 | ||
6303 | match | |
6304 | gfc_match_parameter (void) | |
6305 | { | |
6306 | match m; | |
6307 | ||
6308 | if (gfc_match_char ('(') == MATCH_NO) | |
6309 | return MATCH_NO; | |
6310 | ||
6311 | for (;;) | |
6312 | { | |
6313 | m = do_parm (); | |
6314 | if (m != MATCH_YES) | |
6315 | break; | |
6316 | ||
6317 | if (gfc_match (" )%t") == MATCH_YES) | |
6318 | break; | |
6319 | ||
6320 | if (gfc_match_char (',') != MATCH_YES) | |
6321 | { | |
6322 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
6323 | m = MATCH_ERROR; | |
6324 | break; | |
6325 | } | |
6326 | } | |
6327 | ||
6328 | return m; | |
6329 | } | |
6330 | ||
6331 | ||
6332 | /* Save statements have a special syntax. */ | |
6333 | ||
6334 | match | |
6335 | gfc_match_save (void) | |
6336 | { | |
9056bd70 TS |
6337 | char n[GFC_MAX_SYMBOL_LEN+1]; |
6338 | gfc_common_head *c; | |
6de9cd9a DN |
6339 | gfc_symbol *sym; |
6340 | match m; | |
6341 | ||
6342 | if (gfc_match_eos () == MATCH_YES) | |
6343 | { | |
6344 | if (gfc_current_ns->seen_save) | |
6345 | { | |
636dff67 SK |
6346 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
6347 | "follows previous SAVE statement") | |
09e87839 AL |
6348 | == FAILURE) |
6349 | return MATCH_ERROR; | |
6de9cd9a DN |
6350 | } |
6351 | ||
6352 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
6353 | return MATCH_YES; | |
6354 | } | |
6355 | ||
6356 | if (gfc_current_ns->save_all) | |
6357 | { | |
636dff67 SK |
6358 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
6359 | "blanket SAVE statement") | |
09e87839 AL |
6360 | == FAILURE) |
6361 | return MATCH_ERROR; | |
6de9cd9a DN |
6362 | } |
6363 | ||
6364 | gfc_match (" ::"); | |
6365 | ||
6366 | for (;;) | |
6367 | { | |
6368 | m = gfc_match_symbol (&sym, 0); | |
6369 | switch (m) | |
6370 | { | |
6371 | case MATCH_YES: | |
636dff67 SK |
6372 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
6373 | == FAILURE) | |
6de9cd9a DN |
6374 | return MATCH_ERROR; |
6375 | goto next_item; | |
6376 | ||
6377 | case MATCH_NO: | |
6378 | break; | |
6379 | ||
6380 | case MATCH_ERROR: | |
6381 | return MATCH_ERROR; | |
6382 | } | |
6383 | ||
9056bd70 | 6384 | m = gfc_match (" / %n /", &n); |
6de9cd9a DN |
6385 | if (m == MATCH_ERROR) |
6386 | return MATCH_ERROR; | |
6387 | if (m == MATCH_NO) | |
6388 | goto syntax; | |
6389 | ||
53814b8f | 6390 | c = gfc_get_common (n, 0); |
9056bd70 TS |
6391 | c->saved = 1; |
6392 | ||
6de9cd9a DN |
6393 | gfc_current_ns->seen_save = 1; |
6394 | ||
6395 | next_item: | |
6396 | if (gfc_match_eos () == MATCH_YES) | |
6397 | break; | |
6398 | if (gfc_match_char (',') != MATCH_YES) | |
6399 | goto syntax; | |
6400 | } | |
6401 | ||
6402 | return MATCH_YES; | |
6403 | ||
6404 | syntax: | |
6405 | gfc_error ("Syntax error in SAVE statement at %C"); | |
6406 | return MATCH_ERROR; | |
6407 | } | |
6408 | ||
6409 | ||
06469efd PT |
6410 | match |
6411 | gfc_match_value (void) | |
6412 | { | |
6413 | gfc_symbol *sym; | |
6414 | match m; | |
6415 | ||
9abe5e56 DK |
6416 | /* This is not allowed within a BLOCK construct! */ |
6417 | if (gfc_current_state () == COMP_BLOCK) | |
6418 | { | |
6419 | gfc_error ("VALUE is not allowed inside of BLOCK at %C"); | |
6420 | return MATCH_ERROR; | |
6421 | } | |
6422 | ||
636dff67 | 6423 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
06469efd PT |
6424 | == FAILURE) |
6425 | return MATCH_ERROR; | |
6426 | ||
6427 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6428 | { | |
6429 | return MATCH_ERROR; | |
6430 | } | |
6431 | ||
6432 | if (gfc_match_eos () == MATCH_YES) | |
6433 | goto syntax; | |
6434 | ||
6435 | for(;;) | |
6436 | { | |
6437 | m = gfc_match_symbol (&sym, 0); | |
6438 | switch (m) | |
6439 | { | |
6440 | case MATCH_YES: | |
636dff67 SK |
6441 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
6442 | == FAILURE) | |
06469efd PT |
6443 | return MATCH_ERROR; |
6444 | goto next_item; | |
6445 | ||
6446 | case MATCH_NO: | |
6447 | break; | |
6448 | ||
6449 | case MATCH_ERROR: | |
6450 | return MATCH_ERROR; | |
6451 | } | |
6452 | ||
6453 | next_item: | |
6454 | if (gfc_match_eos () == MATCH_YES) | |
6455 | break; | |
6456 | if (gfc_match_char (',') != MATCH_YES) | |
6457 | goto syntax; | |
6458 | } | |
6459 | ||
6460 | return MATCH_YES; | |
6461 | ||
6462 | syntax: | |
6463 | gfc_error ("Syntax error in VALUE statement at %C"); | |
6464 | return MATCH_ERROR; | |
6465 | } | |
6466 | ||
66e4ab31 | 6467 | |
775e6c3a TB |
6468 | match |
6469 | gfc_match_volatile (void) | |
6470 | { | |
6471 | gfc_symbol *sym; | |
6472 | match m; | |
6473 | ||
636dff67 | 6474 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
775e6c3a TB |
6475 | == FAILURE) |
6476 | return MATCH_ERROR; | |
6477 | ||
6478 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6479 | { | |
6480 | return MATCH_ERROR; | |
6481 | } | |
6482 | ||
6483 | if (gfc_match_eos () == MATCH_YES) | |
6484 | goto syntax; | |
6485 | ||
6486 | for(;;) | |
6487 | { | |
9bce3c1c TB |
6488 | /* VOLATILE is special because it can be added to host-associated |
6489 | symbols locally. */ | |
6490 | m = gfc_match_symbol (&sym, 1); | |
775e6c3a TB |
6491 | switch (m) |
6492 | { | |
6493 | case MATCH_YES: | |
636dff67 SK |
6494 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
6495 | == FAILURE) | |
775e6c3a TB |
6496 | return MATCH_ERROR; |
6497 | goto next_item; | |
6498 | ||
6499 | case MATCH_NO: | |
6500 | break; | |
6501 | ||
6502 | case MATCH_ERROR: | |
6503 | return MATCH_ERROR; | |
6504 | } | |
6505 | ||
6506 | next_item: | |
6507 | if (gfc_match_eos () == MATCH_YES) | |
6508 | break; | |
6509 | if (gfc_match_char (',') != MATCH_YES) | |
6510 | goto syntax; | |
6511 | } | |
6512 | ||
6513 | return MATCH_YES; | |
6514 | ||
6515 | syntax: | |
6516 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
6517 | return MATCH_ERROR; | |
6518 | } | |
6519 | ||
6520 | ||
1eee5628 TB |
6521 | match |
6522 | gfc_match_asynchronous (void) | |
6523 | { | |
6524 | gfc_symbol *sym; | |
6525 | match m; | |
6526 | ||
6527 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS statement at %C") | |
6528 | == FAILURE) | |
6529 | return MATCH_ERROR; | |
6530 | ||
6531 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6532 | { | |
6533 | return MATCH_ERROR; | |
6534 | } | |
6535 | ||
6536 | if (gfc_match_eos () == MATCH_YES) | |
6537 | goto syntax; | |
6538 | ||
6539 | for(;;) | |
6540 | { | |
6541 | /* ASYNCHRONOUS is special because it can be added to host-associated | |
6542 | symbols locally. */ | |
6543 | m = gfc_match_symbol (&sym, 1); | |
6544 | switch (m) | |
6545 | { | |
6546 | case MATCH_YES: | |
6547 | if (gfc_add_asynchronous (&sym->attr, sym->name, &gfc_current_locus) | |
6548 | == FAILURE) | |
6549 | return MATCH_ERROR; | |
6550 | goto next_item; | |
6551 | ||
6552 | case MATCH_NO: | |
6553 | break; | |
6554 | ||
6555 | case MATCH_ERROR: | |
6556 | return MATCH_ERROR; | |
6557 | } | |
6558 | ||
6559 | next_item: | |
6560 | if (gfc_match_eos () == MATCH_YES) | |
6561 | break; | |
6562 | if (gfc_match_char (',') != MATCH_YES) | |
6563 | goto syntax; | |
6564 | } | |
6565 | ||
6566 | return MATCH_YES; | |
6567 | ||
6568 | syntax: | |
6569 | gfc_error ("Syntax error in ASYNCHRONOUS statement at %C"); | |
6570 | return MATCH_ERROR; | |
6571 | } | |
6572 | ||
6573 | ||
6de9cd9a DN |
6574 | /* Match a module procedure statement. Note that we have to modify |
6575 | symbols in the parent's namespace because the current one was there | |
49de9e73 | 6576 | to receive symbols that are in an interface's formal argument list. */ |
6de9cd9a DN |
6577 | |
6578 | match | |
6579 | gfc_match_modproc (void) | |
6580 | { | |
6581 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6582 | gfc_symbol *sym; | |
6583 | match m; | |
060fca4a | 6584 | gfc_namespace *module_ns; |
2b77e908 | 6585 | gfc_interface *old_interface_head, *interface; |
6de9cd9a DN |
6586 | |
6587 | if (gfc_state_stack->state != COMP_INTERFACE | |
6588 | || gfc_state_stack->previous == NULL | |
129d15a3 JW |
6589 | || current_interface.type == INTERFACE_NAMELESS |
6590 | || current_interface.type == INTERFACE_ABSTRACT) | |
6de9cd9a | 6591 | { |
636dff67 SK |
6592 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
6593 | "interface"); | |
6de9cd9a DN |
6594 | return MATCH_ERROR; |
6595 | } | |
6596 | ||
060fca4a PT |
6597 | module_ns = gfc_current_ns->parent; |
6598 | for (; module_ns; module_ns = module_ns->parent) | |
43dfd40c SK |
6599 | if (module_ns->proc_name->attr.flavor == FL_MODULE |
6600 | || module_ns->proc_name->attr.flavor == FL_PROGRAM | |
6601 | || (module_ns->proc_name->attr.flavor == FL_PROCEDURE | |
6602 | && !module_ns->proc_name->attr.contained)) | |
060fca4a PT |
6603 | break; |
6604 | ||
6605 | if (module_ns == NULL) | |
6606 | return MATCH_ERROR; | |
6607 | ||
2b77e908 FXC |
6608 | /* Store the current state of the interface. We will need it if we |
6609 | end up with a syntax error and need to recover. */ | |
6610 | old_interface_head = gfc_current_interface_head (); | |
6611 | ||
6de9cd9a DN |
6612 | for (;;) |
6613 | { | |
43dfd40c | 6614 | locus old_locus = gfc_current_locus; |
2b77e908 FXC |
6615 | bool last = false; |
6616 | ||
6de9cd9a DN |
6617 | m = gfc_match_name (name); |
6618 | if (m == MATCH_NO) | |
6619 | goto syntax; | |
6620 | if (m != MATCH_YES) | |
6621 | return MATCH_ERROR; | |
6622 | ||
2b77e908 FXC |
6623 | /* Check for syntax error before starting to add symbols to the |
6624 | current namespace. */ | |
6625 | if (gfc_match_eos () == MATCH_YES) | |
6626 | last = true; | |
6627 | if (!last && gfc_match_char (',') != MATCH_YES) | |
6628 | goto syntax; | |
6629 | ||
6630 | /* Now we're sure the syntax is valid, we process this item | |
6631 | further. */ | |
060fca4a | 6632 | if (gfc_get_symbol (name, module_ns, &sym)) |
6de9cd9a DN |
6633 | return MATCH_ERROR; |
6634 | ||
43dfd40c SK |
6635 | if (sym->attr.intrinsic) |
6636 | { | |
6637 | gfc_error ("Intrinsic procedure at %L cannot be a MODULE " | |
6638 | "PROCEDURE", &old_locus); | |
6639 | return MATCH_ERROR; | |
6640 | } | |
6641 | ||
6de9cd9a | 6642 | if (sym->attr.proc != PROC_MODULE |
231b2fcc TS |
6643 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
6644 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
6645 | return MATCH_ERROR; |
6646 | ||
6647 | if (gfc_add_interface (sym) == FAILURE) | |
6648 | return MATCH_ERROR; | |
6649 | ||
71f77fd7 | 6650 | sym->attr.mod_proc = 1; |
43dfd40c | 6651 | sym->declared_at = old_locus; |
71f77fd7 | 6652 | |
2b77e908 | 6653 | if (last) |
6de9cd9a | 6654 | break; |
6de9cd9a DN |
6655 | } |
6656 | ||
6657 | return MATCH_YES; | |
6658 | ||
6659 | syntax: | |
2b77e908 FXC |
6660 | /* Restore the previous state of the interface. */ |
6661 | interface = gfc_current_interface_head (); | |
6662 | gfc_set_current_interface_head (old_interface_head); | |
6663 | ||
6664 | /* Free the new interfaces. */ | |
6665 | while (interface != old_interface_head) | |
6666 | { | |
6667 | gfc_interface *i = interface->next; | |
6668 | gfc_free (interface); | |
6669 | interface = i; | |
6670 | } | |
6671 | ||
6672 | /* And issue a syntax error. */ | |
6de9cd9a DN |
6673 | gfc_syntax_error (ST_MODULE_PROC); |
6674 | return MATCH_ERROR; | |
6675 | } | |
6676 | ||
6677 | ||
7d1f1e61 PT |
6678 | /* Check a derived type that is being extended. */ |
6679 | static gfc_symbol* | |
6680 | check_extended_derived_type (char *name) | |
6681 | { | |
6682 | gfc_symbol *extended; | |
6683 | ||
6684 | if (gfc_find_symbol (name, gfc_current_ns, 1, &extended)) | |
6685 | { | |
6686 | gfc_error ("Ambiguous symbol in TYPE definition at %C"); | |
6687 | return NULL; | |
6688 | } | |
6689 | ||
6690 | if (!extended) | |
6691 | { | |
6692 | gfc_error ("No such symbol in TYPE definition at %C"); | |
6693 | return NULL; | |
6694 | } | |
6695 | ||
6696 | if (extended->attr.flavor != FL_DERIVED) | |
6697 | { | |
6698 | gfc_error ("'%s' in EXTENDS expression at %C is not a " | |
6699 | "derived type", name); | |
6700 | return NULL; | |
6701 | } | |
6702 | ||
6703 | if (extended->attr.is_bind_c) | |
6704 | { | |
6705 | gfc_error ("'%s' cannot be extended at %C because it " | |
6706 | "is BIND(C)", extended->name); | |
6707 | return NULL; | |
6708 | } | |
6709 | ||
6710 | if (extended->attr.sequence) | |
6711 | { | |
6712 | gfc_error ("'%s' cannot be extended at %C because it " | |
6713 | "is a SEQUENCE type", extended->name); | |
6714 | return NULL; | |
6715 | } | |
6716 | ||
6717 | return extended; | |
6718 | } | |
6719 | ||
6720 | ||
a8b3b0b6 CR |
6721 | /* Match the optional attribute specifiers for a type declaration. |
6722 | Return MATCH_ERROR if an error is encountered in one of the handled | |
6723 | attributes (public, private, bind(c)), MATCH_NO if what's found is | |
6724 | not a handled attribute, and MATCH_YES otherwise. TODO: More error | |
6725 | checking on attribute conflicts needs to be done. */ | |
6de9cd9a DN |
6726 | |
6727 | match | |
7d1f1e61 | 6728 | gfc_get_type_attr_spec (symbol_attribute *attr, char *name) |
6de9cd9a | 6729 | { |
a8b3b0b6 | 6730 | /* See if the derived type is marked as private. */ |
6de9cd9a DN |
6731 | if (gfc_match (" , private") == MATCH_YES) |
6732 | { | |
d51347f9 | 6733 | if (gfc_current_state () != COMP_MODULE) |
6de9cd9a | 6734 | { |
d51347f9 TB |
6735 | gfc_error ("Derived type at %C can only be PRIVATE in the " |
6736 | "specification part of a module"); | |
6de9cd9a DN |
6737 | return MATCH_ERROR; |
6738 | } | |
6739 | ||
a8b3b0b6 | 6740 | if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
6de9cd9a | 6741 | return MATCH_ERROR; |
6de9cd9a | 6742 | } |
a8b3b0b6 | 6743 | else if (gfc_match (" , public") == MATCH_YES) |
6de9cd9a | 6744 | { |
d51347f9 | 6745 | if (gfc_current_state () != COMP_MODULE) |
6de9cd9a | 6746 | { |
d51347f9 TB |
6747 | gfc_error ("Derived type at %C can only be PUBLIC in the " |
6748 | "specification part of a module"); | |
6de9cd9a DN |
6749 | return MATCH_ERROR; |
6750 | } | |
6751 | ||
a8b3b0b6 | 6752 | if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
6de9cd9a | 6753 | return MATCH_ERROR; |
6de9cd9a | 6754 | } |
52f49934 | 6755 | else if (gfc_match (" , bind ( c )") == MATCH_YES) |
a8b3b0b6 CR |
6756 | { |
6757 | /* If the type is defined to be bind(c) it then needs to make | |
6758 | sure that all fields are interoperable. This will | |
6759 | need to be a semantic check on the finished derived type. | |
6760 | See 15.2.3 (lines 9-12) of F2003 draft. */ | |
6761 | if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) | |
6762 | return MATCH_ERROR; | |
6763 | ||
6764 | /* TODO: attr conflicts need to be checked, probably in symbol.c. */ | |
6765 | } | |
52f49934 DK |
6766 | else if (gfc_match (" , abstract") == MATCH_YES) |
6767 | { | |
6768 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C") | |
6769 | == FAILURE) | |
6770 | return MATCH_ERROR; | |
6771 | ||
6772 | if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE) | |
6773 | return MATCH_ERROR; | |
6774 | } | |
7d1f1e61 PT |
6775 | else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES) |
6776 | { | |
63a3341a | 6777 | if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE) |
7d1f1e61 PT |
6778 | return MATCH_ERROR; |
6779 | } | |
a8b3b0b6 CR |
6780 | else |
6781 | return MATCH_NO; | |
6782 | ||
6783 | /* If we get here, something matched. */ | |
6784 | return MATCH_YES; | |
6785 | } | |
6786 | ||
6787 | ||
a14ce128 PT |
6788 | /* Assign a hash value for a derived type. The algorithm is that of |
6789 | SDBM. The hashed string is '[module_name #] derived_name'. */ | |
6790 | static unsigned int | |
6791 | hash_value (gfc_symbol *sym) | |
6792 | { | |
6793 | unsigned int hash = 0; | |
6794 | const char *c; | |
6795 | int i, len; | |
6796 | ||
6797 | /* Hash of the module or procedure name. */ | |
6798 | if (sym->module != NULL) | |
6799 | c = sym->module; | |
6800 | else if (sym->ns && sym->ns->proc_name | |
6801 | && sym->ns->proc_name->attr.flavor == FL_MODULE) | |
6802 | c = sym->ns->proc_name->name; | |
6803 | else | |
6804 | c = NULL; | |
6805 | ||
6806 | if (c) | |
6807 | { | |
6808 | len = strlen (c); | |
6809 | for (i = 0; i < len; i++, c++) | |
6810 | hash = (hash << 6) + (hash << 16) - hash + (*c); | |
6811 | ||
6812 | /* Disambiguate between 'a' in 'aa' and 'aa' in 'a'. */ | |
6813 | hash = (hash << 6) + (hash << 16) - hash + '#'; | |
6814 | } | |
6815 | ||
6816 | /* Hash of the derived type name. */ | |
6817 | len = strlen (sym->name); | |
6818 | c = sym->name; | |
6819 | for (i = 0; i < len; i++, c++) | |
6820 | hash = (hash << 6) + (hash << 16) - hash + (*c); | |
6821 | ||
6822 | /* Return the hash but take the modulus for the sake of module read, | |
6823 | even though this slightly increases the chance of collision. */ | |
6824 | return (hash % 100000000); | |
6825 | } | |
cf2b3c22 TB |
6826 | |
6827 | ||
a8b3b0b6 CR |
6828 | /* Match the beginning of a derived type declaration. If a type name |
6829 | was the result of a function, then it is possible to have a symbol | |
6830 | already to be known as a derived type yet have no components. */ | |
6831 | ||
6832 | match | |
6833 | gfc_match_derived_decl (void) | |
6834 | { | |
6835 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7d1f1e61 | 6836 | char parent[GFC_MAX_SYMBOL_LEN + 1]; |
a8b3b0b6 CR |
6837 | symbol_attribute attr; |
6838 | gfc_symbol *sym; | |
7d1f1e61 | 6839 | gfc_symbol *extended; |
a8b3b0b6 CR |
6840 | match m; |
6841 | match is_type_attr_spec = MATCH_NO; | |
e7303e85 | 6842 | bool seen_attr = false; |
a8b3b0b6 CR |
6843 | |
6844 | if (gfc_current_state () == COMP_DERIVED) | |
6845 | return MATCH_NO; | |
6846 | ||
7d1f1e61 PT |
6847 | name[0] = '\0'; |
6848 | parent[0] = '\0'; | |
a8b3b0b6 | 6849 | gfc_clear_attr (&attr); |
7d1f1e61 | 6850 | extended = NULL; |
a8b3b0b6 CR |
6851 | |
6852 | do | |
6853 | { | |
7d1f1e61 | 6854 | is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent); |
a8b3b0b6 CR |
6855 | if (is_type_attr_spec == MATCH_ERROR) |
6856 | return MATCH_ERROR; | |
e7303e85 FXC |
6857 | if (is_type_attr_spec == MATCH_YES) |
6858 | seen_attr = true; | |
a8b3b0b6 | 6859 | } while (is_type_attr_spec == MATCH_YES); |
6de9cd9a | 6860 | |
63a3341a PT |
6861 | /* Deal with derived type extensions. The extension attribute has |
6862 | been added to 'attr' but now the parent type must be found and | |
6863 | checked. */ | |
7d1f1e61 PT |
6864 | if (parent[0]) |
6865 | extended = check_extended_derived_type (parent); | |
6866 | ||
6867 | if (parent[0] && !extended) | |
6868 | return MATCH_ERROR; | |
6869 | ||
e7303e85 | 6870 | if (gfc_match (" ::") != MATCH_YES && seen_attr) |
6de9cd9a DN |
6871 | { |
6872 | gfc_error ("Expected :: in TYPE definition at %C"); | |
6873 | return MATCH_ERROR; | |
6874 | } | |
6875 | ||
6876 | m = gfc_match (" %n%t", name); | |
6877 | if (m != MATCH_YES) | |
6878 | return m; | |
6879 | ||
e9c06563 TB |
6880 | /* Make sure the name is not the name of an intrinsic type. */ |
6881 | if (gfc_is_intrinsic_typename (name)) | |
6de9cd9a | 6882 | { |
636dff67 SK |
6883 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
6884 | "type", name); | |
6de9cd9a DN |
6885 | return MATCH_ERROR; |
6886 | } | |
6887 | ||
6888 | if (gfc_get_symbol (name, NULL, &sym)) | |
6889 | return MATCH_ERROR; | |
6890 | ||
6891 | if (sym->ts.type != BT_UNKNOWN) | |
6892 | { | |
6893 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
6894 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
6895 | return MATCH_ERROR; | |
6896 | } | |
6897 | ||
6898 | /* The symbol may already have the derived attribute without the | |
6899 | components. The ways this can happen is via a function | |
6900 | definition, an INTRINSIC statement or a subtype in another | |
6901 | derived type that is a pointer. The first part of the AND clause | |
df2fba9e | 6902 | is true if the symbol is not the return value of a function. */ |
6de9cd9a | 6903 | if (sym->attr.flavor != FL_DERIVED |
231b2fcc | 6904 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
6905 | return MATCH_ERROR; |
6906 | ||
9fa6b0af | 6907 | if (sym->components != NULL || sym->attr.zero_comp) |
6de9cd9a | 6908 | { |
636dff67 SK |
6909 | gfc_error ("Derived type definition of '%s' at %C has already been " |
6910 | "defined", sym->name); | |
6de9cd9a DN |
6911 | return MATCH_ERROR; |
6912 | } | |
6913 | ||
6914 | if (attr.access != ACCESS_UNKNOWN | |
231b2fcc | 6915 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
6916 | return MATCH_ERROR; |
6917 | ||
a8b3b0b6 CR |
6918 | /* See if the derived type was labeled as bind(c). */ |
6919 | if (attr.is_bind_c != 0) | |
6920 | sym->attr.is_bind_c = attr.is_bind_c; | |
6921 | ||
34523524 DK |
6922 | /* Construct the f2k_derived namespace if it is not yet there. */ |
6923 | if (!sym->f2k_derived) | |
6924 | sym->f2k_derived = gfc_get_namespace (NULL, 0); | |
7d1f1e61 PT |
6925 | |
6926 | if (extended && !sym->components) | |
6927 | { | |
6928 | gfc_component *p; | |
6929 | gfc_symtree *st; | |
6930 | ||
6931 | /* Add the extended derived type as the first component. */ | |
6932 | gfc_add_component (sym, parent, &p); | |
7d1f1e61 PT |
6933 | extended->refs++; |
6934 | gfc_set_sym_referenced (extended); | |
6935 | ||
6936 | p->ts.type = BT_DERIVED; | |
bc21d315 | 6937 | p->ts.u.derived = extended; |
7d1f1e61 | 6938 | p->initializer = gfc_default_initializer (&p->ts); |
7c1dab0d JW |
6939 | |
6940 | /* Set extension level. */ | |
6941 | if (extended->attr.extension == 255) | |
6942 | { | |
6943 | /* Since the extension field is 8 bit wide, we can only have | |
6944 | up to 255 extension levels. */ | |
6945 | gfc_error ("Maximum extension level reached with type '%s' at %L", | |
6946 | extended->name, &extended->declared_at); | |
6947 | return MATCH_ERROR; | |
6948 | } | |
6949 | sym->attr.extension = extended->attr.extension + 1; | |
7d1f1e61 PT |
6950 | |
6951 | /* Provide the links between the extended type and its extension. */ | |
6952 | if (!extended->f2k_derived) | |
6953 | extended->f2k_derived = gfc_get_namespace (NULL, 0); | |
6954 | st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name); | |
6955 | st->n.sym = sym; | |
6956 | } | |
6957 | ||
7c1dab0d JW |
6958 | if (!sym->hash_value) |
6959 | /* Set the hash for the compound name for this type. */ | |
6960 | sym->hash_value = hash_value (sym); | |
cf2b3c22 | 6961 | |
52f49934 DK |
6962 | /* Take over the ABSTRACT attribute. */ |
6963 | sym->attr.abstract = attr.abstract; | |
6964 | ||
6de9cd9a DN |
6965 | gfc_new_block = sym; |
6966 | ||
6967 | return MATCH_YES; | |
6968 | } | |
83d890b9 AL |
6969 | |
6970 | ||
6971 | /* Cray Pointees can be declared as: | |
6972 | pointer (ipt, a (n,m,...,*)) | |
6973 | By default, this is treated as an AS_ASSUMED_SIZE array. We'll | |
6974 | cheat and set a constant bound of 1 for the last dimension, if this | |
6975 | is the case. Since there is no bounds-checking for Cray Pointees, | |
6976 | this will be okay. */ | |
6977 | ||
32e8bb8e | 6978 | match |
83d890b9 AL |
6979 | gfc_mod_pointee_as (gfc_array_spec *as) |
6980 | { | |
6981 | as->cray_pointee = true; /* This will be useful to know later. */ | |
6982 | if (as->type == AS_ASSUMED_SIZE) | |
6983 | { | |
6984 | as->type = AS_EXPLICIT; | |
6985 | as->upper[as->rank - 1] = gfc_int_expr (1); | |
6986 | as->cp_was_assumed = true; | |
6987 | } | |
6988 | else if (as->type == AS_ASSUMED_SHAPE) | |
6989 | { | |
6990 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
6991 | return MATCH_ERROR; | |
6992 | } | |
6993 | return MATCH_YES; | |
6994 | } | |
25d8f0a2 TS |
6995 | |
6996 | ||
6997 | /* Match the enum definition statement, here we are trying to match | |
6998 | the first line of enum definition statement. | |
6999 | Returns MATCH_YES if match is found. */ | |
7000 | ||
7001 | match | |
7002 | gfc_match_enum (void) | |
7003 | { | |
7004 | match m; | |
7005 | ||
7006 | m = gfc_match_eos (); | |
7007 | if (m != MATCH_YES) | |
7008 | return m; | |
7009 | ||
6133c68a | 7010 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") |
25d8f0a2 TS |
7011 | == FAILURE) |
7012 | return MATCH_ERROR; | |
7013 | ||
7014 | return MATCH_YES; | |
7015 | } | |
7016 | ||
7017 | ||
31224396 SK |
7018 | /* Returns an initializer whose value is one higher than the value of the |
7019 | LAST_INITIALIZER argument. If the argument is NULL, the | |
7020 | initializers value will be set to zero. The initializer's kind | |
7021 | will be set to gfc_c_int_kind. | |
7022 | ||
7023 | If -fshort-enums is given, the appropriate kind will be selected | |
7024 | later after all enumerators have been parsed. A warning is issued | |
7025 | here if an initializer exceeds gfc_c_int_kind. */ | |
7026 | ||
7027 | static gfc_expr * | |
7028 | enum_initializer (gfc_expr *last_initializer, locus where) | |
7029 | { | |
7030 | gfc_expr *result; | |
7031 | ||
7032 | result = gfc_get_expr (); | |
7033 | result->expr_type = EXPR_CONSTANT; | |
7034 | result->ts.type = BT_INTEGER; | |
7035 | result->ts.kind = gfc_c_int_kind; | |
7036 | result->where = where; | |
7037 | ||
7038 | mpz_init (result->value.integer); | |
7039 | ||
7040 | if (last_initializer != NULL) | |
7041 | { | |
7042 | mpz_add_ui (result->value.integer, last_initializer->value.integer, 1); | |
7043 | result->where = last_initializer->where; | |
7044 | ||
7045 | if (gfc_check_integer_range (result->value.integer, | |
7046 | gfc_c_int_kind) != ARITH_OK) | |
7047 | { | |
7048 | gfc_error ("Enumerator exceeds the C integer type at %C"); | |
7049 | return NULL; | |
7050 | } | |
7051 | } | |
7052 | else | |
7053 | { | |
7054 | /* Control comes here, if it's the very first enumerator and no | |
7055 | initializer has been given. It will be initialized to zero. */ | |
7056 | mpz_set_si (result->value.integer, 0); | |
7057 | } | |
7058 | ||
7059 | return result; | |
7060 | } | |
7061 | ||
7062 | ||
6133c68a TS |
7063 | /* Match a variable name with an optional initializer. When this |
7064 | subroutine is called, a variable is expected to be parsed next. | |
7065 | Depending on what is happening at the moment, updates either the | |
7066 | symbol table or the current interface. */ | |
7067 | ||
7068 | static match | |
7069 | enumerator_decl (void) | |
7070 | { | |
7071 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7072 | gfc_expr *initializer; | |
7073 | gfc_array_spec *as = NULL; | |
7074 | gfc_symbol *sym; | |
7075 | locus var_locus; | |
7076 | match m; | |
17b1d2a0 | 7077 | gfc_try t; |
6133c68a TS |
7078 | locus old_locus; |
7079 | ||
7080 | initializer = NULL; | |
7081 | old_locus = gfc_current_locus; | |
7082 | ||
7083 | /* When we get here, we've just matched a list of attributes and | |
7084 | maybe a type and a double colon. The next thing we expect to see | |
7085 | is the name of the symbol. */ | |
7086 | m = gfc_match_name (name); | |
7087 | if (m != MATCH_YES) | |
7088 | goto cleanup; | |
7089 | ||
7090 | var_locus = gfc_current_locus; | |
7091 | ||
7092 | /* OK, we've successfully matched the declaration. Now put the | |
7093 | symbol in the current namespace. If we fail to create the symbol, | |
7094 | bail out. */ | |
7095 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
7096 | { | |
7097 | m = MATCH_ERROR; | |
7098 | goto cleanup; | |
7099 | } | |
7100 | ||
7101 | /* The double colon must be present in order to have initializers. | |
7102 | Otherwise the statement is ambiguous with an assignment statement. */ | |
7103 | if (colon_seen) | |
7104 | { | |
7105 | if (gfc_match_char ('=') == MATCH_YES) | |
7106 | { | |
7107 | m = gfc_match_init_expr (&initializer); | |
7108 | if (m == MATCH_NO) | |
7109 | { | |
7110 | gfc_error ("Expected an initialization expression at %C"); | |
7111 | m = MATCH_ERROR; | |
7112 | } | |
7113 | ||
7114 | if (m != MATCH_YES) | |
7115 | goto cleanup; | |
7116 | } | |
7117 | } | |
7118 | ||
7119 | /* If we do not have an initializer, the initialization value of the | |
7120 | previous enumerator (stored in last_initializer) is incremented | |
7121 | by 1 and is used to initialize the current enumerator. */ | |
7122 | if (initializer == NULL) | |
31224396 | 7123 | initializer = enum_initializer (last_initializer, old_locus); |
d51347f9 | 7124 | |
6133c68a TS |
7125 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
7126 | { | |
01e64c3d JJ |
7127 | gfc_error ("ENUMERATOR %L not initialized with integer expression", |
7128 | &var_locus); | |
d51347f9 | 7129 | m = MATCH_ERROR; |
6133c68a TS |
7130 | goto cleanup; |
7131 | } | |
7132 | ||
7133 | /* Store this current initializer, for the next enumerator variable | |
7134 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
7135 | use last_initializer below. */ | |
7136 | last_initializer = initializer; | |
7137 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
7138 | ||
7139 | /* Maintain enumerator history. */ | |
7140 | gfc_find_symbol (name, NULL, 0, &sym); | |
7141 | create_enum_history (sym, last_initializer); | |
7142 | ||
7143 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
7144 | ||
7145 | cleanup: | |
7146 | /* Free stuff up and return. */ | |
7147 | gfc_free_expr (initializer); | |
7148 | ||
7149 | return m; | |
7150 | } | |
7151 | ||
7152 | ||
66e4ab31 | 7153 | /* Match the enumerator definition statement. */ |
25d8f0a2 TS |
7154 | |
7155 | match | |
7156 | gfc_match_enumerator_def (void) | |
7157 | { | |
7158 | match m; | |
17b1d2a0 | 7159 | gfc_try t; |
d51347f9 | 7160 | |
25d8f0a2 | 7161 | gfc_clear_ts (¤t_ts); |
d51347f9 | 7162 | |
25d8f0a2 TS |
7163 | m = gfc_match (" enumerator"); |
7164 | if (m != MATCH_YES) | |
7165 | return m; | |
6133c68a TS |
7166 | |
7167 | m = gfc_match (" :: "); | |
7168 | if (m == MATCH_ERROR) | |
7169 | return m; | |
7170 | ||
7171 | colon_seen = (m == MATCH_YES); | |
d51347f9 | 7172 | |
25d8f0a2 TS |
7173 | if (gfc_current_state () != COMP_ENUM) |
7174 | { | |
7175 | gfc_error ("ENUM definition statement expected before %C"); | |
7176 | gfc_free_enum_history (); | |
7177 | return MATCH_ERROR; | |
7178 | } | |
7179 | ||
7180 | (¤t_ts)->type = BT_INTEGER; | |
7181 | (¤t_ts)->kind = gfc_c_int_kind; | |
d51347f9 | 7182 | |
6133c68a TS |
7183 | gfc_clear_attr (¤t_attr); |
7184 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
7185 | if (t == FAILURE) | |
25d8f0a2 | 7186 | { |
6133c68a | 7187 | m = MATCH_ERROR; |
25d8f0a2 TS |
7188 | goto cleanup; |
7189 | } | |
7190 | ||
25d8f0a2 TS |
7191 | for (;;) |
7192 | { | |
6133c68a | 7193 | m = enumerator_decl (); |
25d8f0a2 | 7194 | if (m == MATCH_ERROR) |
01e64c3d JJ |
7195 | { |
7196 | gfc_free_enum_history (); | |
7197 | goto cleanup; | |
7198 | } | |
25d8f0a2 TS |
7199 | if (m == MATCH_NO) |
7200 | break; | |
7201 | ||
7202 | if (gfc_match_eos () == MATCH_YES) | |
7203 | goto cleanup; | |
7204 | if (gfc_match_char (',') != MATCH_YES) | |
7205 | break; | |
7206 | } | |
7207 | ||
7208 | if (gfc_current_state () == COMP_ENUM) | |
7209 | { | |
7210 | gfc_free_enum_history (); | |
7211 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
7212 | m = MATCH_ERROR; | |
7213 | } | |
7214 | ||
7215 | cleanup: | |
7216 | gfc_free_array_spec (current_as); | |
7217 | current_as = NULL; | |
7218 | return m; | |
7219 | ||
7220 | } | |
7221 | ||
f6fad28e | 7222 | |
30b608eb DK |
7223 | /* Match binding attributes. */ |
7224 | ||
7225 | static match | |
713485cc | 7226 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc) |
30b608eb DK |
7227 | { |
7228 | bool found_passing = false; | |
713485cc | 7229 | bool seen_ptr = false; |
90661f26 | 7230 | match m = MATCH_YES; |
30b608eb DK |
7231 | |
7232 | /* Intialize to defaults. Do so even before the MATCH_NO check so that in | |
7233 | this case the defaults are in there. */ | |
7234 | ba->access = ACCESS_UNKNOWN; | |
7235 | ba->pass_arg = NULL; | |
7236 | ba->pass_arg_num = 0; | |
7237 | ba->nopass = 0; | |
7238 | ba->non_overridable = 0; | |
b0e5fa94 | 7239 | ba->deferred = 0; |
90661f26 | 7240 | ba->ppc = ppc; |
30b608eb DK |
7241 | |
7242 | /* If we find a comma, we believe there are binding attributes. */ | |
90661f26 JW |
7243 | m = gfc_match_char (','); |
7244 | if (m == MATCH_NO) | |
7245 | goto done; | |
30b608eb DK |
7246 | |
7247 | do | |
7248 | { | |
e157f736 DK |
7249 | /* Access specifier. */ |
7250 | ||
7251 | m = gfc_match (" public"); | |
30b608eb DK |
7252 | if (m == MATCH_ERROR) |
7253 | goto error; | |
7254 | if (m == MATCH_YES) | |
7255 | { | |
e157f736 | 7256 | if (ba->access != ACCESS_UNKNOWN) |
30b608eb | 7257 | { |
e157f736 | 7258 | gfc_error ("Duplicate access-specifier at %C"); |
30b608eb DK |
7259 | goto error; |
7260 | } | |
7261 | ||
e157f736 | 7262 | ba->access = ACCESS_PUBLIC; |
30b608eb DK |
7263 | continue; |
7264 | } | |
7265 | ||
e157f736 | 7266 | m = gfc_match (" private"); |
30b608eb DK |
7267 | if (m == MATCH_ERROR) |
7268 | goto error; | |
7269 | if (m == MATCH_YES) | |
7270 | { | |
e157f736 | 7271 | if (ba->access != ACCESS_UNKNOWN) |
30b608eb | 7272 | { |
e157f736 | 7273 | gfc_error ("Duplicate access-specifier at %C"); |
30b608eb DK |
7274 | goto error; |
7275 | } | |
7276 | ||
e157f736 | 7277 | ba->access = ACCESS_PRIVATE; |
30b608eb DK |
7278 | continue; |
7279 | } | |
7280 | ||
e157f736 DK |
7281 | /* If inside GENERIC, the following is not allowed. */ |
7282 | if (!generic) | |
30b608eb | 7283 | { |
30b608eb | 7284 | |
e157f736 DK |
7285 | /* NOPASS flag. */ |
7286 | m = gfc_match (" nopass"); | |
7287 | if (m == MATCH_ERROR) | |
7288 | goto error; | |
7289 | if (m == MATCH_YES) | |
30b608eb | 7290 | { |
e157f736 DK |
7291 | if (found_passing) |
7292 | { | |
7293 | gfc_error ("Binding attributes already specify passing," | |
7294 | " illegal NOPASS at %C"); | |
7295 | goto error; | |
7296 | } | |
7297 | ||
7298 | found_passing = true; | |
7299 | ba->nopass = 1; | |
7300 | continue; | |
30b608eb DK |
7301 | } |
7302 | ||
e157f736 DK |
7303 | /* PASS possibly including argument. */ |
7304 | m = gfc_match (" pass"); | |
7305 | if (m == MATCH_ERROR) | |
7306 | goto error; | |
7307 | if (m == MATCH_YES) | |
30b608eb | 7308 | { |
e157f736 DK |
7309 | char arg[GFC_MAX_SYMBOL_LEN + 1]; |
7310 | ||
7311 | if (found_passing) | |
7312 | { | |
7313 | gfc_error ("Binding attributes already specify passing," | |
7314 | " illegal PASS at %C"); | |
7315 | goto error; | |
7316 | } | |
7317 | ||
7318 | m = gfc_match (" ( %n )", arg); | |
7319 | if (m == MATCH_ERROR) | |
7320 | goto error; | |
7321 | if (m == MATCH_YES) | |
90661f26 | 7322 | ba->pass_arg = gfc_get_string (arg); |
e157f736 DK |
7323 | gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL)); |
7324 | ||
7325 | found_passing = true; | |
7326 | ba->nopass = 0; | |
7327 | continue; | |
30b608eb DK |
7328 | } |
7329 | ||
713485cc JW |
7330 | if (ppc) |
7331 | { | |
7332 | /* POINTER flag. */ | |
7333 | m = gfc_match (" pointer"); | |
7334 | if (m == MATCH_ERROR) | |
7335 | goto error; | |
7336 | if (m == MATCH_YES) | |
7337 | { | |
7338 | if (seen_ptr) | |
7339 | { | |
7340 | gfc_error ("Duplicate POINTER attribute at %C"); | |
7341 | goto error; | |
7342 | } | |
7343 | ||
7344 | seen_ptr = true; | |
713485cc JW |
7345 | continue; |
7346 | } | |
7347 | } | |
7348 | else | |
7349 | { | |
7350 | /* NON_OVERRIDABLE flag. */ | |
7351 | m = gfc_match (" non_overridable"); | |
7352 | if (m == MATCH_ERROR) | |
7353 | goto error; | |
7354 | if (m == MATCH_YES) | |
7355 | { | |
7356 | if (ba->non_overridable) | |
7357 | { | |
7358 | gfc_error ("Duplicate NON_OVERRIDABLE at %C"); | |
7359 | goto error; | |
7360 | } | |
7361 | ||
7362 | ba->non_overridable = 1; | |
7363 | continue; | |
7364 | } | |
7365 | ||
7366 | /* DEFERRED flag. */ | |
7367 | m = gfc_match (" deferred"); | |
7368 | if (m == MATCH_ERROR) | |
7369 | goto error; | |
7370 | if (m == MATCH_YES) | |
7371 | { | |
7372 | if (ba->deferred) | |
7373 | { | |
7374 | gfc_error ("Duplicate DEFERRED at %C"); | |
7375 | goto error; | |
7376 | } | |
7377 | ||
7378 | ba->deferred = 1; | |
7379 | continue; | |
7380 | } | |
7381 | } | |
7382 | ||
30b608eb DK |
7383 | } |
7384 | ||
7385 | /* Nothing matching found. */ | |
e157f736 DK |
7386 | if (generic) |
7387 | gfc_error ("Expected access-specifier at %C"); | |
7388 | else | |
7389 | gfc_error ("Expected binding attribute at %C"); | |
30b608eb DK |
7390 | goto error; |
7391 | } | |
7392 | while (gfc_match_char (',') == MATCH_YES); | |
7393 | ||
b0e5fa94 DK |
7394 | /* NON_OVERRIDABLE and DEFERRED exclude themselves. */ |
7395 | if (ba->non_overridable && ba->deferred) | |
7396 | { | |
7397 | gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C"); | |
7398 | goto error; | |
7399 | } | |
7400 | ||
90661f26 JW |
7401 | m = MATCH_YES; |
7402 | ||
7403 | done: | |
e157f736 DK |
7404 | if (ba->access == ACCESS_UNKNOWN) |
7405 | ba->access = gfc_typebound_default_access; | |
7406 | ||
713485cc JW |
7407 | if (ppc && !seen_ptr) |
7408 | { | |
7409 | gfc_error ("POINTER attribute is required for procedure pointer component" | |
7410 | " at %C"); | |
7411 | goto error; | |
7412 | } | |
7413 | ||
90661f26 | 7414 | return m; |
30b608eb DK |
7415 | |
7416 | error: | |
30b608eb DK |
7417 | return MATCH_ERROR; |
7418 | } | |
7419 | ||
7420 | ||
7421 | /* Match a PROCEDURE specific binding inside a derived type. */ | |
7422 | ||
7423 | static match | |
7424 | match_procedure_in_type (void) | |
7425 | { | |
7426 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7427 | char target_buf[GFC_MAX_SYMBOL_LEN + 1]; | |
b0e5fa94 | 7428 | char* target = NULL; |
30b608eb DK |
7429 | gfc_typebound_proc* tb; |
7430 | bool seen_colons; | |
7431 | bool seen_attrs; | |
7432 | match m; | |
7433 | gfc_symtree* stree; | |
7434 | gfc_namespace* ns; | |
7435 | gfc_symbol* block; | |
7436 | ||
7437 | /* Check current state. */ | |
7438 | gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS); | |
7439 | block = gfc_state_stack->previous->sym; | |
7440 | gcc_assert (block); | |
7441 | ||
b0e5fa94 | 7442 | /* Try to match PROCEDURE(interface). */ |
30b608eb DK |
7443 | if (gfc_match (" (") == MATCH_YES) |
7444 | { | |
b0e5fa94 DK |
7445 | m = gfc_match_name (target_buf); |
7446 | if (m == MATCH_ERROR) | |
7447 | return m; | |
7448 | if (m != MATCH_YES) | |
7449 | { | |
7450 | gfc_error ("Interface-name expected after '(' at %C"); | |
7451 | return MATCH_ERROR; | |
7452 | } | |
7453 | ||
7454 | if (gfc_match (" )") != MATCH_YES) | |
7455 | { | |
7456 | gfc_error ("')' expected at %C"); | |
7457 | return MATCH_ERROR; | |
7458 | } | |
7459 | ||
7460 | target = target_buf; | |
30b608eb DK |
7461 | } |
7462 | ||
7463 | /* Construct the data structure. */ | |
8e1f752a | 7464 | tb = gfc_get_typebound_proc (); |
30b608eb | 7465 | tb->where = gfc_current_locus; |
e157f736 | 7466 | tb->is_generic = 0; |
30b608eb DK |
7467 | |
7468 | /* Match binding attributes. */ | |
713485cc | 7469 | m = match_binding_attributes (tb, false, false); |
30b608eb DK |
7470 | if (m == MATCH_ERROR) |
7471 | return m; | |
7472 | seen_attrs = (m == MATCH_YES); | |
7473 | ||
b0e5fa94 DK |
7474 | /* Check that attribute DEFERRED is given iff an interface is specified, which |
7475 | means target != NULL. */ | |
7476 | if (tb->deferred && !target) | |
7477 | { | |
7478 | gfc_error ("Interface must be specified for DEFERRED binding at %C"); | |
7479 | return MATCH_ERROR; | |
7480 | } | |
7481 | if (target && !tb->deferred) | |
7482 | { | |
7483 | gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED"); | |
7484 | return MATCH_ERROR; | |
7485 | } | |
7486 | ||
30b608eb DK |
7487 | /* Match the colons. */ |
7488 | m = gfc_match (" ::"); | |
7489 | if (m == MATCH_ERROR) | |
7490 | return m; | |
7491 | seen_colons = (m == MATCH_YES); | |
7492 | if (seen_attrs && !seen_colons) | |
7493 | { | |
7494 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
7495 | return MATCH_ERROR; | |
7496 | } | |
7497 | ||
7498 | /* Match the binding name. */ | |
7499 | m = gfc_match_name (name); | |
7500 | if (m == MATCH_ERROR) | |
7501 | return m; | |
7502 | if (m == MATCH_NO) | |
7503 | { | |
7504 | gfc_error ("Expected binding name at %C"); | |
7505 | return MATCH_ERROR; | |
7506 | } | |
7507 | ||
7508 | /* Try to match the '=> target', if it's there. */ | |
30b608eb DK |
7509 | m = gfc_match (" =>"); |
7510 | if (m == MATCH_ERROR) | |
7511 | return m; | |
7512 | if (m == MATCH_YES) | |
7513 | { | |
b0e5fa94 DK |
7514 | if (tb->deferred) |
7515 | { | |
7516 | gfc_error ("'=> target' is invalid for DEFERRED binding at %C"); | |
7517 | return MATCH_ERROR; | |
7518 | } | |
7519 | ||
30b608eb DK |
7520 | if (!seen_colons) |
7521 | { | |
7522 | gfc_error ("'::' needed in PROCEDURE binding with explicit target" | |
7523 | " at %C"); | |
7524 | return MATCH_ERROR; | |
7525 | } | |
7526 | ||
7527 | m = gfc_match_name (target_buf); | |
7528 | if (m == MATCH_ERROR) | |
7529 | return m; | |
7530 | if (m == MATCH_NO) | |
7531 | { | |
7532 | gfc_error ("Expected binding target after '=>' at %C"); | |
7533 | return MATCH_ERROR; | |
7534 | } | |
7535 | target = target_buf; | |
7536 | } | |
7537 | ||
7538 | /* Now we should have the end. */ | |
7539 | m = gfc_match_eos (); | |
7540 | if (m == MATCH_ERROR) | |
7541 | return m; | |
7542 | if (m == MATCH_NO) | |
7543 | { | |
7544 | gfc_error ("Junk after PROCEDURE declaration at %C"); | |
7545 | return MATCH_ERROR; | |
7546 | } | |
7547 | ||
7548 | /* If no target was found, it has the same name as the binding. */ | |
7549 | if (!target) | |
7550 | target = name; | |
7551 | ||
7552 | /* Get the namespace to insert the symbols into. */ | |
7553 | ns = block->f2k_derived; | |
7554 | gcc_assert (ns); | |
7555 | ||
b0e5fa94 DK |
7556 | /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */ |
7557 | if (tb->deferred && !block->attr.abstract) | |
7558 | { | |
7559 | gfc_error ("Type '%s' containing DEFERRED binding at %C is not ABSTRACT", | |
7560 | block->name); | |
7561 | return MATCH_ERROR; | |
7562 | } | |
7563 | ||
30b608eb | 7564 | /* See if we already have a binding with this name in the symtree which would |
e157f736 DK |
7565 | be an error. If a GENERIC already targetted this binding, it may be |
7566 | already there but then typebound is still NULL. */ | |
e34ccb4c DK |
7567 | stree = gfc_find_symtree (ns->tb_sym_root, name); |
7568 | if (stree && stree->n.tb) | |
30b608eb DK |
7569 | { |
7570 | gfc_error ("There's already a procedure with binding name '%s' for the" | |
7571 | " derived type '%s' at %C", name, block->name); | |
7572 | return MATCH_ERROR; | |
7573 | } | |
7574 | ||
7575 | /* Insert it and set attributes. */ | |
e34ccb4c DK |
7576 | |
7577 | if (!stree) | |
7578 | { | |
7579 | stree = gfc_new_symtree (&ns->tb_sym_root, name); | |
7580 | gcc_assert (stree); | |
7581 | } | |
7582 | stree->n.tb = tb; | |
7583 | ||
08a6b8e0 | 7584 | if (gfc_get_sym_tree (target, gfc_current_ns, &tb->u.specific, false)) |
30b608eb | 7585 | return MATCH_ERROR; |
e157f736 | 7586 | gfc_set_sym_referenced (tb->u.specific->n.sym); |
30b608eb DK |
7587 | |
7588 | return MATCH_YES; | |
7589 | } | |
7590 | ||
7591 | ||
e157f736 DK |
7592 | /* Match a GENERIC procedure binding inside a derived type. */ |
7593 | ||
7594 | match | |
7595 | gfc_match_generic (void) | |
7596 | { | |
7597 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
94747289 | 7598 | char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */ |
e157f736 DK |
7599 | gfc_symbol* block; |
7600 | gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */ | |
7601 | gfc_typebound_proc* tb; | |
e157f736 | 7602 | gfc_namespace* ns; |
94747289 DK |
7603 | interface_type op_type; |
7604 | gfc_intrinsic_op op; | |
e157f736 DK |
7605 | match m; |
7606 | ||
7607 | /* Check current state. */ | |
7608 | if (gfc_current_state () == COMP_DERIVED) | |
7609 | { | |
7610 | gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS"); | |
7611 | return MATCH_ERROR; | |
7612 | } | |
7613 | if (gfc_current_state () != COMP_DERIVED_CONTAINS) | |
7614 | return MATCH_NO; | |
7615 | block = gfc_state_stack->previous->sym; | |
7616 | ns = block->f2k_derived; | |
7617 | gcc_assert (block && ns); | |
7618 | ||
7619 | /* See if we get an access-specifier. */ | |
713485cc | 7620 | m = match_binding_attributes (&tbattr, true, false); |
e157f736 DK |
7621 | if (m == MATCH_ERROR) |
7622 | goto error; | |
7623 | ||
7624 | /* Now the colons, those are required. */ | |
7625 | if (gfc_match (" ::") != MATCH_YES) | |
7626 | { | |
7627 | gfc_error ("Expected '::' at %C"); | |
7628 | goto error; | |
7629 | } | |
7630 | ||
94747289 DK |
7631 | /* Match the binding name; depending on type (operator / generic) format |
7632 | it for future error messages into bind_name. */ | |
7633 | ||
7634 | m = gfc_match_generic_spec (&op_type, name, &op); | |
e157f736 DK |
7635 | if (m == MATCH_ERROR) |
7636 | return MATCH_ERROR; | |
7637 | if (m == MATCH_NO) | |
7638 | { | |
94747289 | 7639 | gfc_error ("Expected generic name or operator descriptor at %C"); |
e157f736 DK |
7640 | goto error; |
7641 | } | |
7642 | ||
94747289 | 7643 | switch (op_type) |
e157f736 | 7644 | { |
94747289 DK |
7645 | case INTERFACE_GENERIC: |
7646 | snprintf (bind_name, sizeof (bind_name), "%s", name); | |
7647 | break; | |
7648 | ||
7649 | case INTERFACE_USER_OP: | |
7650 | snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name); | |
7651 | break; | |
7652 | ||
7653 | case INTERFACE_INTRINSIC_OP: | |
7654 | snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)", | |
7655 | gfc_op2string (op)); | |
7656 | break; | |
7657 | ||
7658 | default: | |
7659 | gcc_unreachable (); | |
7660 | } | |
e34ccb4c | 7661 | |
94747289 DK |
7662 | /* Match the required =>. */ |
7663 | if (gfc_match (" =>") != MATCH_YES) | |
7664 | { | |
7665 | gfc_error ("Expected '=>' at %C"); | |
7666 | goto error; | |
7667 | } | |
7668 | ||
7669 | /* Try to find existing GENERIC binding with this name / for this operator; | |
7670 | if there is something, check that it is another GENERIC and then extend | |
7671 | it rather than building a new node. Otherwise, create it and put it | |
7672 | at the right position. */ | |
7673 | ||
7674 | switch (op_type) | |
7675 | { | |
7676 | case INTERFACE_USER_OP: | |
7677 | case INTERFACE_GENERIC: | |
7678 | { | |
7679 | const bool is_op = (op_type == INTERFACE_USER_OP); | |
7680 | gfc_symtree* st; | |
7681 | ||
7682 | st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name); | |
7683 | if (st) | |
7684 | { | |
7685 | tb = st->n.tb; | |
7686 | gcc_assert (tb); | |
7687 | } | |
7688 | else | |
7689 | tb = NULL; | |
7690 | ||
7691 | break; | |
7692 | } | |
7693 | ||
7694 | case INTERFACE_INTRINSIC_OP: | |
7695 | tb = ns->tb_op[op]; | |
7696 | break; | |
7697 | ||
7698 | default: | |
7699 | gcc_unreachable (); | |
7700 | } | |
7701 | ||
7702 | if (tb) | |
7703 | { | |
e34ccb4c | 7704 | if (!tb->is_generic) |
e157f736 | 7705 | { |
94747289 | 7706 | gcc_assert (op_type == INTERFACE_GENERIC); |
e157f736 DK |
7707 | gfc_error ("There's already a non-generic procedure with binding name" |
7708 | " '%s' for the derived type '%s' at %C", | |
94747289 | 7709 | bind_name, block->name); |
e157f736 DK |
7710 | goto error; |
7711 | } | |
7712 | ||
e157f736 DK |
7713 | if (tb->access != tbattr.access) |
7714 | { | |
7715 | gfc_error ("Binding at %C must have the same access as already" | |
94747289 | 7716 | " defined binding '%s'", bind_name); |
e157f736 DK |
7717 | goto error; |
7718 | } | |
7719 | } | |
7720 | else | |
7721 | { | |
94747289 | 7722 | tb = gfc_get_typebound_proc (); |
e157f736 DK |
7723 | tb->where = gfc_current_locus; |
7724 | tb->access = tbattr.access; | |
7725 | tb->is_generic = 1; | |
7726 | tb->u.generic = NULL; | |
94747289 DK |
7727 | |
7728 | switch (op_type) | |
7729 | { | |
7730 | case INTERFACE_GENERIC: | |
7731 | case INTERFACE_USER_OP: | |
7732 | { | |
7733 | const bool is_op = (op_type == INTERFACE_USER_OP); | |
7734 | gfc_symtree* st; | |
7735 | ||
7736 | st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root, | |
7737 | name); | |
7738 | gcc_assert (st); | |
7739 | st->n.tb = tb; | |
7740 | ||
7741 | break; | |
7742 | } | |
7743 | ||
7744 | case INTERFACE_INTRINSIC_OP: | |
7745 | ns->tb_op[op] = tb; | |
7746 | break; | |
7747 | ||
7748 | default: | |
7749 | gcc_unreachable (); | |
7750 | } | |
e157f736 DK |
7751 | } |
7752 | ||
7753 | /* Now, match all following names as specific targets. */ | |
7754 | do | |
7755 | { | |
7756 | gfc_symtree* target_st; | |
7757 | gfc_tbp_generic* target; | |
7758 | ||
7759 | m = gfc_match_name (name); | |
7760 | if (m == MATCH_ERROR) | |
7761 | goto error; | |
7762 | if (m == MATCH_NO) | |
7763 | { | |
7764 | gfc_error ("Expected specific binding name at %C"); | |
7765 | goto error; | |
7766 | } | |
7767 | ||
e34ccb4c | 7768 | target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name); |
e157f736 DK |
7769 | |
7770 | /* See if this is a duplicate specification. */ | |
7771 | for (target = tb->u.generic; target; target = target->next) | |
7772 | if (target_st == target->specific_st) | |
7773 | { | |
7774 | gfc_error ("'%s' already defined as specific binding for the" | |
94747289 | 7775 | " generic '%s' at %C", name, bind_name); |
e157f736 DK |
7776 | goto error; |
7777 | } | |
7778 | ||
e157f736 DK |
7779 | target = gfc_get_tbp_generic (); |
7780 | target->specific_st = target_st; | |
7781 | target->specific = NULL; | |
7782 | target->next = tb->u.generic; | |
7783 | tb->u.generic = target; | |
7784 | } | |
7785 | while (gfc_match (" ,") == MATCH_YES); | |
7786 | ||
7787 | /* Here should be the end. */ | |
7788 | if (gfc_match_eos () != MATCH_YES) | |
7789 | { | |
7790 | gfc_error ("Junk after GENERIC binding at %C"); | |
7791 | goto error; | |
7792 | } | |
7793 | ||
7794 | return MATCH_YES; | |
7795 | ||
7796 | error: | |
7797 | return MATCH_ERROR; | |
7798 | } | |
7799 | ||
7800 | ||
34523524 DK |
7801 | /* Match a FINAL declaration inside a derived type. */ |
7802 | ||
7803 | match | |
7804 | gfc_match_final_decl (void) | |
7805 | { | |
7806 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7807 | gfc_symbol* sym; | |
7808 | match m; | |
7809 | gfc_namespace* module_ns; | |
7810 | bool first, last; | |
30b608eb | 7811 | gfc_symbol* block; |
34523524 | 7812 | |
30b608eb | 7813 | if (gfc_state_stack->state != COMP_DERIVED_CONTAINS) |
34523524 DK |
7814 | { |
7815 | gfc_error ("FINAL declaration at %C must be inside a derived type " | |
30b608eb | 7816 | "CONTAINS section"); |
34523524 DK |
7817 | return MATCH_ERROR; |
7818 | } | |
7819 | ||
30b608eb DK |
7820 | block = gfc_state_stack->previous->sym; |
7821 | gcc_assert (block); | |
34523524 | 7822 | |
30b608eb DK |
7823 | if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous |
7824 | || gfc_state_stack->previous->previous->state != COMP_MODULE) | |
34523524 DK |
7825 | { |
7826 | gfc_error ("Derived type declaration with FINAL at %C must be in the" | |
7827 | " specification part of a MODULE"); | |
7828 | return MATCH_ERROR; | |
7829 | } | |
7830 | ||
7831 | module_ns = gfc_current_ns; | |
7832 | gcc_assert (module_ns); | |
7833 | gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE); | |
7834 | ||
7835 | /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */ | |
7836 | if (gfc_match (" ::") == MATCH_ERROR) | |
7837 | return MATCH_ERROR; | |
7838 | ||
7839 | /* Match the sequence of procedure names. */ | |
7840 | first = true; | |
7841 | last = false; | |
7842 | do | |
7843 | { | |
7844 | gfc_finalizer* f; | |
7845 | ||
7846 | if (first && gfc_match_eos () == MATCH_YES) | |
7847 | { | |
7848 | gfc_error ("Empty FINAL at %C"); | |
7849 | return MATCH_ERROR; | |
7850 | } | |
7851 | ||
7852 | m = gfc_match_name (name); | |
7853 | if (m == MATCH_NO) | |
7854 | { | |
7855 | gfc_error ("Expected module procedure name at %C"); | |
7856 | return MATCH_ERROR; | |
7857 | } | |
7858 | else if (m != MATCH_YES) | |
7859 | return MATCH_ERROR; | |
7860 | ||
7861 | if (gfc_match_eos () == MATCH_YES) | |
7862 | last = true; | |
7863 | if (!last && gfc_match_char (',') != MATCH_YES) | |
7864 | { | |
7865 | gfc_error ("Expected ',' at %C"); | |
7866 | return MATCH_ERROR; | |
7867 | } | |
7868 | ||
7869 | if (gfc_get_symbol (name, module_ns, &sym)) | |
7870 | { | |
7871 | gfc_error ("Unknown procedure name \"%s\" at %C", name); | |
7872 | return MATCH_ERROR; | |
7873 | } | |
7874 | ||
7875 | /* Mark the symbol as module procedure. */ | |
7876 | if (sym->attr.proc != PROC_MODULE | |
7877 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
7878 | sym->name, NULL) == FAILURE) | |
7879 | return MATCH_ERROR; | |
7880 | ||
7881 | /* Check if we already have this symbol in the list, this is an error. */ | |
30b608eb | 7882 | for (f = block->f2k_derived->finalizers; f; f = f->next) |
f6fad28e | 7883 | if (f->proc_sym == sym) |
34523524 DK |
7884 | { |
7885 | gfc_error ("'%s' at %C is already defined as FINAL procedure!", | |
7886 | name); | |
7887 | return MATCH_ERROR; | |
7888 | } | |
7889 | ||
7890 | /* Add this symbol to the list of finalizers. */ | |
30b608eb | 7891 | gcc_assert (block->f2k_derived); |
34523524 | 7892 | ++sym->refs; |
ece3f663 | 7893 | f = XCNEW (gfc_finalizer); |
f6fad28e DK |
7894 | f->proc_sym = sym; |
7895 | f->proc_tree = NULL; | |
34523524 | 7896 | f->where = gfc_current_locus; |
30b608eb DK |
7897 | f->next = block->f2k_derived->finalizers; |
7898 | block->f2k_derived->finalizers = f; | |
34523524 DK |
7899 | |
7900 | first = false; | |
7901 | } | |
7902 | while (!last); | |
7903 | ||
7904 | return MATCH_YES; | |
7905 | } | |
08a6b8e0 TB |
7906 | |
7907 | ||
7908 | const ext_attr_t ext_attr_list[] = { | |
7909 | { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" }, | |
7910 | { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" }, | |
7911 | { "cdecl", EXT_ATTR_CDECL, "cdecl" }, | |
7912 | { "stdcall", EXT_ATTR_STDCALL, "stdcall" }, | |
7913 | { "fastcall", EXT_ATTR_FASTCALL, "fastcall" }, | |
7914 | { NULL, EXT_ATTR_LAST, NULL } | |
7915 | }; | |
7916 | ||
7917 | /* Match a !GCC$ ATTRIBUTES statement of the form: | |
7918 | !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ... | |
7919 | When we come here, we have already matched the !GCC$ ATTRIBUTES string. | |
7920 | ||
7921 | TODO: We should support all GCC attributes using the same syntax for | |
7922 | the attribute list, i.e. the list in C | |
7923 | __attributes(( attribute-list )) | |
7924 | matches then | |
7925 | !GCC$ ATTRIBUTES attribute-list :: | |
7926 | Cf. c-parser.c's c_parser_attributes; the data can then directly be | |
7927 | saved into a TREE. | |
7928 | ||
7929 | As there is absolutely no risk of confusion, we should never return | |
7930 | MATCH_NO. */ | |
7931 | match | |
7932 | gfc_match_gcc_attributes (void) | |
7933 | { | |
7934 | symbol_attribute attr; | |
7935 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7936 | unsigned id; | |
7937 | gfc_symbol *sym; | |
7938 | match m; | |
7939 | ||
7940 | gfc_clear_attr (&attr); | |
7941 | for(;;) | |
7942 | { | |
7943 | char ch; | |
7944 | ||
7945 | if (gfc_match_name (name) != MATCH_YES) | |
7946 | return MATCH_ERROR; | |
7947 | ||
7948 | for (id = 0; id < EXT_ATTR_LAST; id++) | |
7949 | if (strcmp (name, ext_attr_list[id].name) == 0) | |
7950 | break; | |
7951 | ||
7952 | if (id == EXT_ATTR_LAST) | |
7953 | { | |
7954 | gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C"); | |
7955 | return MATCH_ERROR; | |
7956 | } | |
7957 | ||
2b374f55 | 7958 | if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus) |
08a6b8e0 TB |
7959 | == FAILURE) |
7960 | return MATCH_ERROR; | |
7961 | ||
7962 | gfc_gobble_whitespace (); | |
7963 | ch = gfc_next_ascii_char (); | |
7964 | if (ch == ':') | |
7965 | { | |
7966 | /* This is the successful exit condition for the loop. */ | |
7967 | if (gfc_next_ascii_char () == ':') | |
7968 | break; | |
7969 | } | |
7970 | ||
7971 | if (ch == ',') | |
7972 | continue; | |
7973 | ||
7974 | goto syntax; | |
7975 | } | |
7976 | ||
7977 | if (gfc_match_eos () == MATCH_YES) | |
7978 | goto syntax; | |
7979 | ||
7980 | for(;;) | |
7981 | { | |
7982 | m = gfc_match_name (name); | |
7983 | if (m != MATCH_YES) | |
7984 | return m; | |
7985 | ||
7986 | if (find_special (name, &sym, true)) | |
7987 | return MATCH_ERROR; | |
7988 | ||
7989 | sym->attr.ext_attr |= attr.ext_attr; | |
7990 | ||
7991 | if (gfc_match_eos () == MATCH_YES) | |
7992 | break; | |
7993 | ||
7994 | if (gfc_match_char (',') != MATCH_YES) | |
7995 | goto syntax; | |
7996 | } | |
7997 | ||
7998 | return MATCH_YES; | |
7999 | ||
8000 | syntax: | |
8001 | gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C"); | |
8002 | return MATCH_ERROR; | |
8003 | } |