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