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6de9cd9a | 1 | /* Declaration statement matcher |
7fcd5ad5 | 2 | Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
636dff67 | 3 | Free Software Foundation, Inc. |
6de9cd9a DN |
4 | Contributed by Andy Vaught |
5 | ||
9fc4d79b | 6 | This file is part of GCC. |
6de9cd9a | 7 | |
9fc4d79b TS |
8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
d234d788 | 10 | Software Foundation; either version 3, or (at your option) any later |
9fc4d79b | 11 | version. |
6de9cd9a | 12 | |
9fc4d79b TS |
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
6de9cd9a DN |
17 | |
18 | You should have received a copy of the GNU General Public License | |
d234d788 NC |
19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a | 21 | |
6de9cd9a | 22 | #include "config.h" |
d22e4895 | 23 | #include "system.h" |
6de9cd9a DN |
24 | #include "gfortran.h" |
25 | #include "match.h" | |
26 | #include "parse.h" | |
cab129d1 | 27 | #include "flags.h" |
b7e75771 | 28 | #include "constructor.h" |
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; | |
c9d75a48 | 137 | mpz_clear (p->repeat); |
294fbfc8 TS |
138 | gfc_free_expr (p->expr); |
139 | gfc_free (p); | |
140 | } | |
141 | } | |
142 | ||
143 | ||
144 | /* Free a list of gfc_data structures. */ | |
145 | ||
146 | void | |
636dff67 | 147 | gfc_free_data (gfc_data *p) |
294fbfc8 TS |
148 | { |
149 | gfc_data *q; | |
150 | ||
151 | for (; p; p = q) | |
152 | { | |
153 | q = p->next; | |
294fbfc8 TS |
154 | free_variable (p->var); |
155 | free_value (p->value); | |
294fbfc8 TS |
156 | gfc_free (p); |
157 | } | |
158 | } | |
159 | ||
160 | ||
a9f6f1f2 | 161 | /* Free all data in a namespace. */ |
636dff67 | 162 | |
a9f6f1f2 | 163 | static void |
66e4ab31 | 164 | gfc_free_data_all (gfc_namespace *ns) |
a9f6f1f2 JD |
165 | { |
166 | gfc_data *d; | |
167 | ||
168 | for (;ns->data;) | |
169 | { | |
170 | d = ns->data->next; | |
171 | gfc_free (ns->data); | |
172 | ns->data = d; | |
173 | } | |
174 | } | |
175 | ||
176 | ||
294fbfc8 TS |
177 | static match var_element (gfc_data_variable *); |
178 | ||
179 | /* Match a list of variables terminated by an iterator and a right | |
180 | parenthesis. */ | |
181 | ||
182 | static match | |
636dff67 | 183 | var_list (gfc_data_variable *parent) |
294fbfc8 TS |
184 | { |
185 | gfc_data_variable *tail, var; | |
186 | match m; | |
187 | ||
188 | m = var_element (&var); | |
189 | if (m == MATCH_ERROR) | |
190 | return MATCH_ERROR; | |
191 | if (m == MATCH_NO) | |
192 | goto syntax; | |
193 | ||
194 | tail = gfc_get_data_variable (); | |
195 | *tail = var; | |
196 | ||
197 | parent->list = tail; | |
198 | ||
199 | for (;;) | |
200 | { | |
201 | if (gfc_match_char (',') != MATCH_YES) | |
202 | goto syntax; | |
203 | ||
204 | m = gfc_match_iterator (&parent->iter, 1); | |
205 | if (m == MATCH_YES) | |
206 | break; | |
207 | if (m == MATCH_ERROR) | |
208 | return MATCH_ERROR; | |
209 | ||
210 | m = var_element (&var); | |
211 | if (m == MATCH_ERROR) | |
212 | return MATCH_ERROR; | |
213 | if (m == MATCH_NO) | |
214 | goto syntax; | |
215 | ||
216 | tail->next = gfc_get_data_variable (); | |
217 | tail = tail->next; | |
218 | ||
219 | *tail = var; | |
220 | } | |
221 | ||
222 | if (gfc_match_char (')') != MATCH_YES) | |
223 | goto syntax; | |
224 | return MATCH_YES; | |
225 | ||
226 | syntax: | |
227 | gfc_syntax_error (ST_DATA); | |
228 | return MATCH_ERROR; | |
229 | } | |
230 | ||
231 | ||
232 | /* Match a single element in a data variable list, which can be a | |
233 | variable-iterator list. */ | |
234 | ||
235 | static match | |
7b901ac4 | 236 | var_element (gfc_data_variable *new_var) |
294fbfc8 TS |
237 | { |
238 | match m; | |
239 | gfc_symbol *sym; | |
240 | ||
7b901ac4 | 241 | memset (new_var, 0, sizeof (gfc_data_variable)); |
294fbfc8 TS |
242 | |
243 | if (gfc_match_char ('(') == MATCH_YES) | |
7b901ac4 | 244 | return var_list (new_var); |
294fbfc8 | 245 | |
7b901ac4 | 246 | m = gfc_match_variable (&new_var->expr, 0); |
294fbfc8 TS |
247 | if (m != MATCH_YES) |
248 | return m; | |
249 | ||
7b901ac4 | 250 | sym = new_var->expr->symtree->n.sym; |
294fbfc8 | 251 | |
f37e928c DK |
252 | /* Symbol should already have an associated type. */ |
253 | if (gfc_check_symbol_typed (sym, gfc_current_ns, | |
254 | false, gfc_current_locus) == FAILURE) | |
255 | return MATCH_ERROR; | |
256 | ||
636dff67 SK |
257 | if (!sym->attr.function && gfc_current_ns->parent |
258 | && gfc_current_ns->parent == sym->ns) | |
294fbfc8 | 259 | { |
4075a94e | 260 | gfc_error ("Host associated variable '%s' may not be in the DATA " |
e25a0da3 | 261 | "statement at %C", sym->name); |
294fbfc8 TS |
262 | return MATCH_ERROR; |
263 | } | |
264 | ||
4075a94e | 265 | if (gfc_current_state () != COMP_BLOCK_DATA |
636dff67 SK |
266 | && sym->attr.in_common |
267 | && gfc_notify_std (GFC_STD_GNU, "Extension: initialization of " | |
268 | "common block variable '%s' in DATA statement at %C", | |
269 | sym->name) == FAILURE) | |
4075a94e | 270 | return MATCH_ERROR; |
294fbfc8 | 271 | |
7b901ac4 | 272 | if (gfc_add_data (&sym->attr, sym->name, &new_var->expr->where) == FAILURE) |
294fbfc8 TS |
273 | return MATCH_ERROR; |
274 | ||
275 | return MATCH_YES; | |
276 | } | |
277 | ||
278 | ||
279 | /* Match the top-level list of data variables. */ | |
280 | ||
281 | static match | |
636dff67 | 282 | top_var_list (gfc_data *d) |
294fbfc8 | 283 | { |
7b901ac4 | 284 | gfc_data_variable var, *tail, *new_var; |
294fbfc8 TS |
285 | match m; |
286 | ||
287 | tail = NULL; | |
288 | ||
289 | for (;;) | |
290 | { | |
291 | m = var_element (&var); | |
292 | if (m == MATCH_NO) | |
293 | goto syntax; | |
294 | if (m == MATCH_ERROR) | |
295 | return MATCH_ERROR; | |
296 | ||
7b901ac4 KG |
297 | new_var = gfc_get_data_variable (); |
298 | *new_var = var; | |
294fbfc8 TS |
299 | |
300 | if (tail == NULL) | |
7b901ac4 | 301 | d->var = new_var; |
294fbfc8 | 302 | else |
7b901ac4 | 303 | tail->next = new_var; |
294fbfc8 | 304 | |
7b901ac4 | 305 | tail = new_var; |
294fbfc8 TS |
306 | |
307 | if (gfc_match_char ('/') == MATCH_YES) | |
308 | break; | |
309 | if (gfc_match_char (',') != MATCH_YES) | |
310 | goto syntax; | |
311 | } | |
312 | ||
313 | return MATCH_YES; | |
314 | ||
315 | syntax: | |
316 | gfc_syntax_error (ST_DATA); | |
a9f6f1f2 | 317 | gfc_free_data_all (gfc_current_ns); |
294fbfc8 TS |
318 | return MATCH_ERROR; |
319 | } | |
320 | ||
321 | ||
322 | static match | |
636dff67 | 323 | match_data_constant (gfc_expr **result) |
294fbfc8 TS |
324 | { |
325 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
326 | gfc_symbol *sym; | |
327 | gfc_expr *expr; | |
328 | match m; | |
36d3fb4c | 329 | locus old_loc; |
294fbfc8 TS |
330 | |
331 | m = gfc_match_literal_constant (&expr, 1); | |
332 | if (m == MATCH_YES) | |
333 | { | |
334 | *result = expr; | |
335 | return MATCH_YES; | |
336 | } | |
337 | ||
338 | if (m == MATCH_ERROR) | |
339 | return MATCH_ERROR; | |
340 | ||
341 | m = gfc_match_null (result); | |
342 | if (m != MATCH_NO) | |
343 | return m; | |
344 | ||
36d3fb4c PT |
345 | old_loc = gfc_current_locus; |
346 | ||
347 | /* Should this be a structure component, try to match it | |
348 | before matching a name. */ | |
349 | m = gfc_match_rvalue (result); | |
350 | if (m == MATCH_ERROR) | |
351 | return m; | |
352 | ||
353 | if (m == MATCH_YES && (*result)->expr_type == EXPR_STRUCTURE) | |
354 | { | |
355 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
356 | m = MATCH_ERROR; | |
357 | return m; | |
358 | } | |
359 | ||
360 | gfc_current_locus = old_loc; | |
361 | ||
294fbfc8 TS |
362 | m = gfc_match_name (name); |
363 | if (m != MATCH_YES) | |
364 | return m; | |
365 | ||
366 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
367 | return MATCH_ERROR; | |
368 | ||
369 | if (sym == NULL | |
370 | || (sym->attr.flavor != FL_PARAMETER && sym->attr.flavor != FL_DERIVED)) | |
371 | { | |
372 | gfc_error ("Symbol '%s' must be a PARAMETER in DATA statement at %C", | |
373 | name); | |
374 | return MATCH_ERROR; | |
375 | } | |
376 | else if (sym->attr.flavor == FL_DERIVED) | |
7d1f1e61 | 377 | return gfc_match_structure_constructor (sym, result, false); |
294fbfc8 | 378 | |
d46e0870 JD |
379 | /* Check to see if the value is an initialization array expression. */ |
380 | if (sym->value->expr_type == EXPR_ARRAY) | |
381 | { | |
382 | gfc_current_locus = old_loc; | |
383 | ||
384 | m = gfc_match_init_expr (result); | |
385 | if (m == MATCH_ERROR) | |
386 | return m; | |
387 | ||
388 | if (m == MATCH_YES) | |
389 | { | |
390 | if (gfc_simplify_expr (*result, 0) == FAILURE) | |
391 | m = MATCH_ERROR; | |
392 | ||
393 | if ((*result)->expr_type == EXPR_CONSTANT) | |
394 | return m; | |
395 | else | |
396 | { | |
397 | gfc_error ("Invalid initializer %s in Data statement at %C", name); | |
398 | return MATCH_ERROR; | |
399 | } | |
400 | } | |
401 | } | |
402 | ||
294fbfc8 TS |
403 | *result = gfc_copy_expr (sym->value); |
404 | return MATCH_YES; | |
405 | } | |
406 | ||
407 | ||
408 | /* Match a list of values in a DATA statement. The leading '/' has | |
409 | already been seen at this point. */ | |
410 | ||
411 | static match | |
636dff67 | 412 | top_val_list (gfc_data *data) |
294fbfc8 | 413 | { |
7b901ac4 | 414 | gfc_data_value *new_val, *tail; |
294fbfc8 | 415 | gfc_expr *expr; |
294fbfc8 TS |
416 | match m; |
417 | ||
418 | tail = NULL; | |
419 | ||
420 | for (;;) | |
421 | { | |
422 | m = match_data_constant (&expr); | |
423 | if (m == MATCH_NO) | |
424 | goto syntax; | |
425 | if (m == MATCH_ERROR) | |
426 | return MATCH_ERROR; | |
427 | ||
7b901ac4 KG |
428 | new_val = gfc_get_data_value (); |
429 | mpz_init (new_val->repeat); | |
294fbfc8 TS |
430 | |
431 | if (tail == NULL) | |
7b901ac4 | 432 | data->value = new_val; |
294fbfc8 | 433 | else |
7b901ac4 | 434 | tail->next = new_val; |
294fbfc8 | 435 | |
7b901ac4 | 436 | tail = new_val; |
294fbfc8 TS |
437 | |
438 | if (expr->ts.type != BT_INTEGER || gfc_match_char ('*') != MATCH_YES) | |
439 | { | |
440 | tail->expr = expr; | |
f2112868 | 441 | mpz_set_ui (tail->repeat, 1); |
294fbfc8 TS |
442 | } |
443 | else | |
444 | { | |
f2112868 SK |
445 | if (expr->ts.type == BT_INTEGER) |
446 | mpz_set (tail->repeat, expr->value.integer); | |
294fbfc8 | 447 | gfc_free_expr (expr); |
294fbfc8 TS |
448 | |
449 | m = match_data_constant (&tail->expr); | |
450 | if (m == MATCH_NO) | |
451 | goto syntax; | |
452 | if (m == MATCH_ERROR) | |
453 | return MATCH_ERROR; | |
454 | } | |
455 | ||
456 | if (gfc_match_char ('/') == MATCH_YES) | |
457 | break; | |
458 | if (gfc_match_char (',') == MATCH_NO) | |
459 | goto syntax; | |
460 | } | |
461 | ||
462 | return MATCH_YES; | |
463 | ||
464 | syntax: | |
465 | gfc_syntax_error (ST_DATA); | |
a9f6f1f2 | 466 | gfc_free_data_all (gfc_current_ns); |
294fbfc8 TS |
467 | return MATCH_ERROR; |
468 | } | |
469 | ||
470 | ||
471 | /* Matches an old style initialization. */ | |
472 | ||
473 | static match | |
474 | match_old_style_init (const char *name) | |
475 | { | |
476 | match m; | |
477 | gfc_symtree *st; | |
ed0e3607 | 478 | gfc_symbol *sym; |
294fbfc8 TS |
479 | gfc_data *newdata; |
480 | ||
481 | /* Set up data structure to hold initializers. */ | |
482 | gfc_find_sym_tree (name, NULL, 0, &st); | |
ed0e3607 AL |
483 | sym = st->n.sym; |
484 | ||
294fbfc8 TS |
485 | newdata = gfc_get_data (); |
486 | newdata->var = gfc_get_data_variable (); | |
487 | newdata->var->expr = gfc_get_variable_expr (st); | |
8c5c0b80 | 488 | newdata->where = gfc_current_locus; |
294fbfc8 | 489 | |
66e4ab31 | 490 | /* Match initial value list. This also eats the terminal '/'. */ |
294fbfc8 TS |
491 | m = top_val_list (newdata); |
492 | if (m != MATCH_YES) | |
493 | { | |
494 | gfc_free (newdata); | |
495 | return m; | |
496 | } | |
497 | ||
498 | if (gfc_pure (NULL)) | |
499 | { | |
500 | gfc_error ("Initialization at %C is not allowed in a PURE procedure"); | |
501 | gfc_free (newdata); | |
502 | return MATCH_ERROR; | |
503 | } | |
504 | ||
ed0e3607 AL |
505 | /* Mark the variable as having appeared in a data statement. */ |
506 | if (gfc_add_data (&sym->attr, sym->name, &sym->declared_at) == FAILURE) | |
507 | { | |
508 | gfc_free (newdata); | |
509 | return MATCH_ERROR; | |
510 | } | |
511 | ||
294fbfc8 TS |
512 | /* Chain in namespace list of DATA initializers. */ |
513 | newdata->next = gfc_current_ns->data; | |
514 | gfc_current_ns->data = newdata; | |
515 | ||
516 | return m; | |
517 | } | |
518 | ||
636dff67 | 519 | |
294fbfc8 | 520 | /* Match the stuff following a DATA statement. If ERROR_FLAG is set, |
13795658 | 521 | we are matching a DATA statement and are therefore issuing an error |
d51347f9 | 522 | if we encounter something unexpected, if not, we're trying to match |
69de3b83 | 523 | an old-style initialization expression of the form INTEGER I /2/. */ |
294fbfc8 TS |
524 | |
525 | match | |
526 | gfc_match_data (void) | |
527 | { | |
7b901ac4 | 528 | gfc_data *new_data; |
294fbfc8 TS |
529 | match m; |
530 | ||
ca39e6f2 | 531 | set_in_match_data (true); |
2220652d | 532 | |
294fbfc8 TS |
533 | for (;;) |
534 | { | |
7b901ac4 KG |
535 | new_data = gfc_get_data (); |
536 | new_data->where = gfc_current_locus; | |
294fbfc8 | 537 | |
7b901ac4 | 538 | m = top_var_list (new_data); |
294fbfc8 TS |
539 | if (m != MATCH_YES) |
540 | goto cleanup; | |
541 | ||
7b901ac4 | 542 | m = top_val_list (new_data); |
294fbfc8 TS |
543 | if (m != MATCH_YES) |
544 | goto cleanup; | |
545 | ||
7b901ac4 KG |
546 | new_data->next = gfc_current_ns->data; |
547 | gfc_current_ns->data = new_data; | |
294fbfc8 TS |
548 | |
549 | if (gfc_match_eos () == MATCH_YES) | |
550 | break; | |
551 | ||
552 | gfc_match_char (','); /* Optional comma */ | |
553 | } | |
554 | ||
ca39e6f2 | 555 | set_in_match_data (false); |
2220652d | 556 | |
294fbfc8 TS |
557 | if (gfc_pure (NULL)) |
558 | { | |
559 | gfc_error ("DATA statement at %C is not allowed in a PURE procedure"); | |
560 | return MATCH_ERROR; | |
561 | } | |
562 | ||
563 | return MATCH_YES; | |
564 | ||
565 | cleanup: | |
ca39e6f2 | 566 | set_in_match_data (false); |
7b901ac4 | 567 | gfc_free_data (new_data); |
294fbfc8 TS |
568 | return MATCH_ERROR; |
569 | } | |
570 | ||
571 | ||
572 | /************************ Declaration statements *********************/ | |
573 | ||
d3a9eea2 TB |
574 | |
575 | /* Auxilliary function to merge DIMENSION and CODIMENSION array specs. */ | |
576 | ||
577 | static void | |
578 | merge_array_spec (gfc_array_spec *from, gfc_array_spec *to, bool copy) | |
579 | { | |
580 | int i; | |
581 | ||
582 | if (to->rank == 0 && from->rank > 0) | |
583 | { | |
584 | to->rank = from->rank; | |
585 | to->type = from->type; | |
586 | to->cray_pointee = from->cray_pointee; | |
587 | to->cp_was_assumed = from->cp_was_assumed; | |
588 | ||
589 | for (i = 0; i < to->corank; i++) | |
590 | { | |
591 | to->lower[from->rank + i] = to->lower[i]; | |
592 | to->upper[from->rank + i] = to->upper[i]; | |
593 | } | |
594 | for (i = 0; i < from->rank; i++) | |
595 | { | |
596 | if (copy) | |
597 | { | |
598 | to->lower[i] = gfc_copy_expr (from->lower[i]); | |
599 | to->upper[i] = gfc_copy_expr (from->upper[i]); | |
600 | } | |
601 | else | |
602 | { | |
603 | to->lower[i] = from->lower[i]; | |
604 | to->upper[i] = from->upper[i]; | |
605 | } | |
606 | } | |
607 | } | |
608 | else if (to->corank == 0 && from->corank > 0) | |
609 | { | |
610 | to->corank = from->corank; | |
611 | to->cotype = from->cotype; | |
612 | ||
613 | for (i = 0; i < from->corank; i++) | |
614 | { | |
615 | if (copy) | |
616 | { | |
617 | to->lower[to->rank + i] = gfc_copy_expr (from->lower[i]); | |
618 | to->upper[to->rank + i] = gfc_copy_expr (from->upper[i]); | |
619 | } | |
620 | else | |
621 | { | |
622 | to->lower[to->rank + i] = from->lower[i]; | |
623 | to->upper[to->rank + i] = from->upper[i]; | |
624 | } | |
625 | } | |
626 | } | |
627 | } | |
628 | ||
629 | ||
6de9cd9a DN |
630 | /* Match an intent specification. Since this can only happen after an |
631 | INTENT word, a legal intent-spec must follow. */ | |
632 | ||
633 | static sym_intent | |
634 | match_intent_spec (void) | |
635 | { | |
636 | ||
637 | if (gfc_match (" ( in out )") == MATCH_YES) | |
638 | return INTENT_INOUT; | |
639 | if (gfc_match (" ( in )") == MATCH_YES) | |
640 | return INTENT_IN; | |
641 | if (gfc_match (" ( out )") == MATCH_YES) | |
642 | return INTENT_OUT; | |
643 | ||
644 | gfc_error ("Bad INTENT specification at %C"); | |
645 | return INTENT_UNKNOWN; | |
646 | } | |
647 | ||
648 | ||
649 | /* Matches a character length specification, which is either a | |
650 | specification expression or a '*'. */ | |
651 | ||
652 | static match | |
636dff67 | 653 | char_len_param_value (gfc_expr **expr) |
6de9cd9a | 654 | { |
cba28dad JD |
655 | match m; |
656 | ||
6de9cd9a DN |
657 | if (gfc_match_char ('*') == MATCH_YES) |
658 | { | |
659 | *expr = NULL; | |
660 | return MATCH_YES; | |
661 | } | |
662 | ||
cba28dad | 663 | m = gfc_match_expr (expr); |
f37e928c DK |
664 | |
665 | if (m == MATCH_YES | |
666 | && gfc_expr_check_typed (*expr, gfc_current_ns, false) == FAILURE) | |
667 | return MATCH_ERROR; | |
668 | ||
cba28dad JD |
669 | if (m == MATCH_YES && (*expr)->expr_type == EXPR_FUNCTION) |
670 | { | |
671 | if ((*expr)->value.function.actual | |
672 | && (*expr)->value.function.actual->expr->symtree) | |
673 | { | |
674 | gfc_expr *e; | |
675 | e = (*expr)->value.function.actual->expr; | |
676 | if (e->symtree->n.sym->attr.flavor == FL_PROCEDURE | |
677 | && e->expr_type == EXPR_VARIABLE) | |
678 | { | |
679 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) | |
680 | goto syntax; | |
681 | if (e->symtree->n.sym->ts.type == BT_CHARACTER | |
bc21d315 JW |
682 | && e->symtree->n.sym->ts.u.cl |
683 | && e->symtree->n.sym->ts.u.cl->length->ts.type == BT_UNKNOWN) | |
cba28dad JD |
684 | goto syntax; |
685 | } | |
686 | } | |
687 | } | |
688 | return m; | |
689 | ||
690 | syntax: | |
691 | gfc_error ("Conflict in attributes of function argument at %C"); | |
692 | return MATCH_ERROR; | |
6de9cd9a DN |
693 | } |
694 | ||
695 | ||
696 | /* A character length is a '*' followed by a literal integer or a | |
697 | char_len_param_value in parenthesis. */ | |
698 | ||
699 | static match | |
636dff67 | 700 | match_char_length (gfc_expr **expr) |
6de9cd9a | 701 | { |
5cf54585 | 702 | int length; |
6de9cd9a DN |
703 | match m; |
704 | ||
705 | m = gfc_match_char ('*'); | |
706 | if (m != MATCH_YES) | |
707 | return m; | |
708 | ||
5cf54585 | 709 | m = gfc_match_small_literal_int (&length, NULL); |
6de9cd9a DN |
710 | if (m == MATCH_ERROR) |
711 | return m; | |
712 | ||
713 | if (m == MATCH_YES) | |
714 | { | |
e2ab8b09 JW |
715 | if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: " |
716 | "Old-style character length at %C") == FAILURE) | |
717 | return MATCH_ERROR; | |
b7e75771 | 718 | *expr = gfc_get_int_expr (gfc_default_integer_kind, NULL, length); |
6de9cd9a DN |
719 | return m; |
720 | } | |
721 | ||
722 | if (gfc_match_char ('(') == MATCH_NO) | |
723 | goto syntax; | |
724 | ||
725 | m = char_len_param_value (expr); | |
1c8bcdf7 PT |
726 | if (m != MATCH_YES && gfc_matching_function) |
727 | { | |
728 | gfc_undo_symbols (); | |
729 | m = MATCH_YES; | |
730 | } | |
731 | ||
6de9cd9a DN |
732 | if (m == MATCH_ERROR) |
733 | return m; | |
734 | if (m == MATCH_NO) | |
735 | goto syntax; | |
736 | ||
737 | if (gfc_match_char (')') == MATCH_NO) | |
738 | { | |
739 | gfc_free_expr (*expr); | |
740 | *expr = NULL; | |
741 | goto syntax; | |
742 | } | |
743 | ||
744 | return MATCH_YES; | |
745 | ||
746 | syntax: | |
747 | gfc_error ("Syntax error in character length specification at %C"); | |
748 | return MATCH_ERROR; | |
749 | } | |
750 | ||
751 | ||
9e35b386 EE |
752 | /* Special subroutine for finding a symbol. Check if the name is found |
753 | in the current name space. If not, and we're compiling a function or | |
754 | subroutine and the parent compilation unit is an interface, then check | |
755 | to see if the name we've been given is the name of the interface | |
756 | (located in another namespace). */ | |
6de9cd9a DN |
757 | |
758 | static int | |
08a6b8e0 | 759 | find_special (const char *name, gfc_symbol **result, bool allow_subroutine) |
6de9cd9a DN |
760 | { |
761 | gfc_state_data *s; | |
08a6b8e0 | 762 | gfc_symtree *st; |
9e35b386 | 763 | int i; |
6de9cd9a | 764 | |
08a6b8e0 | 765 | i = gfc_get_sym_tree (name, NULL, &st, allow_subroutine); |
d51347f9 | 766 | if (i == 0) |
08a6b8e0 TB |
767 | { |
768 | *result = st ? st->n.sym : NULL; | |
769 | goto end; | |
770 | } | |
d51347f9 | 771 | |
6de9cd9a DN |
772 | if (gfc_current_state () != COMP_SUBROUTINE |
773 | && gfc_current_state () != COMP_FUNCTION) | |
9e35b386 | 774 | goto end; |
6de9cd9a DN |
775 | |
776 | s = gfc_state_stack->previous; | |
777 | if (s == NULL) | |
9e35b386 | 778 | goto end; |
6de9cd9a DN |
779 | |
780 | if (s->state != COMP_INTERFACE) | |
9e35b386 | 781 | goto end; |
6de9cd9a | 782 | if (s->sym == NULL) |
66e4ab31 | 783 | goto end; /* Nameless interface. */ |
6de9cd9a DN |
784 | |
785 | if (strcmp (name, s->sym->name) == 0) | |
786 | { | |
787 | *result = s->sym; | |
788 | return 0; | |
789 | } | |
790 | ||
9e35b386 EE |
791 | end: |
792 | return i; | |
6de9cd9a DN |
793 | } |
794 | ||
795 | ||
796 | /* Special subroutine for getting a symbol node associated with a | |
797 | procedure name, used in SUBROUTINE and FUNCTION statements. The | |
798 | symbol is created in the parent using with symtree node in the | |
799 | child unit pointing to the symbol. If the current namespace has no | |
800 | parent, then the symbol is just created in the current unit. */ | |
801 | ||
802 | static int | |
636dff67 | 803 | get_proc_name (const char *name, gfc_symbol **result, bool module_fcn_entry) |
6de9cd9a DN |
804 | { |
805 | gfc_symtree *st; | |
806 | gfc_symbol *sym; | |
a7ca4d8d | 807 | int rc = 0; |
6de9cd9a | 808 | |
1a492601 PT |
809 | /* Module functions have to be left in their own namespace because |
810 | they have potentially (almost certainly!) already been referenced. | |
811 | In this sense, they are rather like external functions. This is | |
812 | fixed up in resolve.c(resolve_entries), where the symbol name- | |
813 | space is set to point to the master function, so that the fake | |
814 | result mechanism can work. */ | |
815 | if (module_fcn_entry) | |
6c12686b PT |
816 | { |
817 | /* Present if entry is declared to be a module procedure. */ | |
818 | rc = gfc_find_symbol (name, gfc_current_ns->parent, 0, result); | |
aa84a9a5 | 819 | |
6c12686b PT |
820 | if (*result == NULL) |
821 | rc = gfc_get_symbol (name, NULL, result); | |
2e32a71e | 822 | else if (!gfc_get_symbol (name, NULL, &sym) && sym |
aa84a9a5 PT |
823 | && (*result)->ts.type == BT_UNKNOWN |
824 | && sym->attr.flavor == FL_UNKNOWN) | |
825 | /* Pick up the typespec for the entry, if declared in the function | |
826 | body. Note that this symbol is FL_UNKNOWN because it will | |
827 | only have appeared in a type declaration. The local symtree | |
828 | is set to point to the module symbol and a unique symtree | |
829 | to the local version. This latter ensures a correct clearing | |
830 | of the symbols. */ | |
2e32a71e PT |
831 | { |
832 | /* If the ENTRY proceeds its specification, we need to ensure | |
833 | that this does not raise a "has no IMPLICIT type" error. */ | |
834 | if (sym->ts.type == BT_UNKNOWN) | |
0e5a218b | 835 | sym->attr.untyped = 1; |
2e32a71e | 836 | |
0e5a218b | 837 | (*result)->ts = sym->ts; |
2e32a71e PT |
838 | |
839 | /* Put the symbol in the procedure namespace so that, should | |
df2fba9e | 840 | the ENTRY precede its specification, the specification |
2e32a71e PT |
841 | can be applied. */ |
842 | (*result)->ns = gfc_current_ns; | |
843 | ||
844 | gfc_find_sym_tree (name, gfc_current_ns, 0, &st); | |
845 | st->n.sym = *result; | |
846 | st = gfc_get_unique_symtree (gfc_current_ns); | |
847 | st->n.sym = sym; | |
848 | } | |
6c12686b | 849 | } |
68ea355b PT |
850 | else |
851 | rc = gfc_get_symbol (name, gfc_current_ns->parent, result); | |
6de9cd9a | 852 | |
a7ca4d8d PT |
853 | if (rc) |
854 | return rc; | |
855 | ||
68ea355b | 856 | sym = *result; |
2c693a24 | 857 | gfc_current_ns->refs++; |
6de9cd9a | 858 | |
7b901ac4 | 859 | if (sym && !sym->gfc_new && gfc_current_state () != COMP_INTERFACE) |
68ea355b | 860 | { |
cda7004b PT |
861 | /* Trap another encompassed procedure with the same name. All |
862 | these conditions are necessary to avoid picking up an entry | |
863 | whose name clashes with that of the encompassing procedure; | |
864 | this is handled using gsymbols to register unique,globally | |
865 | accessible names. */ | |
68ea355b | 866 | if (sym->attr.flavor != 0 |
636dff67 SK |
867 | && sym->attr.proc != 0 |
868 | && (sym->attr.subroutine || sym->attr.function) | |
869 | && sym->attr.if_source != IFSRC_UNKNOWN) | |
68ea355b PT |
870 | gfc_error_now ("Procedure '%s' at %C is already defined at %L", |
871 | name, &sym->declared_at); | |
872 | ||
fd3e70af JD |
873 | /* Trap a procedure with a name the same as interface in the |
874 | encompassing scope. */ | |
875 | if (sym->attr.generic != 0 | |
2305fa31 JD |
876 | && (sym->attr.subroutine || sym->attr.function) |
877 | && !sym->attr.mod_proc) | |
fd3e70af JD |
878 | gfc_error_now ("Name '%s' at %C is already defined" |
879 | " as a generic interface at %L", | |
880 | name, &sym->declared_at); | |
881 | ||
68ea355b PT |
882 | /* Trap declarations of attributes in encompassing scope. The |
883 | signature for this is that ts.kind is set. Legitimate | |
884 | references only set ts.type. */ | |
885 | if (sym->ts.kind != 0 | |
636dff67 SK |
886 | && !sym->attr.implicit_type |
887 | && sym->attr.proc == 0 | |
888 | && gfc_current_ns->parent != NULL | |
889 | && sym->attr.access == 0 | |
890 | && !module_fcn_entry) | |
891 | gfc_error_now ("Procedure '%s' at %C has an explicit interface " | |
892 | "and must not have attributes declared at %L", | |
68ea355b PT |
893 | name, &sym->declared_at); |
894 | } | |
895 | ||
896 | if (gfc_current_ns->parent == NULL || *result == NULL) | |
897 | return rc; | |
6de9cd9a | 898 | |
1a492601 PT |
899 | /* Module function entries will already have a symtree in |
900 | the current namespace but will need one at module level. */ | |
901 | if (module_fcn_entry) | |
6c12686b PT |
902 | { |
903 | /* Present if entry is declared to be a module procedure. */ | |
904 | rc = gfc_find_sym_tree (name, gfc_current_ns->parent, 0, &st); | |
905 | if (st == NULL) | |
906 | st = gfc_new_symtree (&gfc_current_ns->parent->sym_root, name); | |
907 | } | |
1a492601 PT |
908 | else |
909 | st = gfc_new_symtree (&gfc_current_ns->sym_root, name); | |
6de9cd9a | 910 | |
6de9cd9a DN |
911 | st->n.sym = sym; |
912 | sym->refs++; | |
913 | ||
66e4ab31 | 914 | /* See if the procedure should be a module procedure. */ |
6de9cd9a | 915 | |
1a492601 | 916 | if (((sym->ns->proc_name != NULL |
6c12686b PT |
917 | && sym->ns->proc_name->attr.flavor == FL_MODULE |
918 | && sym->attr.proc != PROC_MODULE) | |
919 | || (module_fcn_entry && sym->attr.proc != PROC_MODULE)) | |
920 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
921 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
922 | rc = 2; |
923 | ||
924 | return rc; | |
925 | } | |
926 | ||
927 | ||
a8b3b0b6 CR |
928 | /* Verify that the given symbol representing a parameter is C |
929 | interoperable, by checking to see if it was marked as such after | |
930 | its declaration. If the given symbol is not interoperable, a | |
931 | warning is reported, thus removing the need to return the status to | |
932 | the calling function. The standard does not require the user use | |
933 | one of the iso_c_binding named constants to declare an | |
934 | interoperable parameter, but we can't be sure if the param is C | |
935 | interop or not if the user doesn't. For example, integer(4) may be | |
936 | legal Fortran, but doesn't have meaning in C. It may interop with | |
937 | a number of the C types, which causes a problem because the | |
938 | compiler can't know which one. This code is almost certainly not | |
939 | portable, and the user will get what they deserve if the C type | |
940 | across platforms isn't always interoperable with integer(4). If | |
941 | the user had used something like integer(c_int) or integer(c_long), | |
942 | the compiler could have automatically handled the varying sizes | |
943 | across platforms. */ | |
944 | ||
17b1d2a0 | 945 | gfc_try |
a8b3b0b6 CR |
946 | verify_c_interop_param (gfc_symbol *sym) |
947 | { | |
948 | int is_c_interop = 0; | |
17b1d2a0 | 949 | gfc_try retval = SUCCESS; |
a8b3b0b6 CR |
950 | |
951 | /* We check implicitly typed variables in symbol.c:gfc_set_default_type(). | |
952 | Don't repeat the checks here. */ | |
953 | if (sym->attr.implicit_type) | |
954 | return SUCCESS; | |
955 | ||
956 | /* For subroutines or functions that are passed to a BIND(C) procedure, | |
957 | they're interoperable if they're BIND(C) and their params are all | |
958 | interoperable. */ | |
959 | if (sym->attr.flavor == FL_PROCEDURE) | |
960 | { | |
961 | if (sym->attr.is_bind_c == 0) | |
962 | { | |
963 | gfc_error_now ("Procedure '%s' at %L must have the BIND(C) " | |
964 | "attribute to be C interoperable", sym->name, | |
965 | &(sym->declared_at)); | |
966 | ||
967 | return FAILURE; | |
968 | } | |
969 | else | |
970 | { | |
971 | if (sym->attr.is_c_interop == 1) | |
972 | /* We've already checked this procedure; don't check it again. */ | |
973 | return SUCCESS; | |
974 | else | |
975 | return verify_bind_c_sym (sym, &(sym->ts), sym->attr.in_common, | |
976 | sym->common_block); | |
977 | } | |
978 | } | |
979 | ||
980 | /* See if we've stored a reference to a procedure that owns sym. */ | |
981 | if (sym->ns != NULL && sym->ns->proc_name != NULL) | |
982 | { | |
983 | if (sym->ns->proc_name->attr.is_bind_c == 1) | |
984 | { | |
985 | is_c_interop = | |
2ec855f1 | 986 | (verify_c_interop (&(sym->ts)) |
a8b3b0b6 CR |
987 | == SUCCESS ? 1 : 0); |
988 | ||
989 | if (is_c_interop != 1) | |
990 | { | |
991 | /* Make personalized messages to give better feedback. */ | |
992 | if (sym->ts.type == BT_DERIVED) | |
993 | gfc_error ("Type '%s' at %L is a parameter to the BIND(C) " | |
994 | " procedure '%s' but is not C interoperable " | |
995 | "because derived type '%s' is not C interoperable", | |
996 | sym->name, &(sym->declared_at), | |
997 | sym->ns->proc_name->name, | |
bc21d315 | 998 | sym->ts.u.derived->name); |
a8b3b0b6 CR |
999 | else |
1000 | gfc_warning ("Variable '%s' at %L is a parameter to the " | |
1001 | "BIND(C) procedure '%s' but may not be C " | |
1002 | "interoperable", | |
1003 | sym->name, &(sym->declared_at), | |
1004 | sym->ns->proc_name->name); | |
1005 | } | |
aa5e22f0 CR |
1006 | |
1007 | /* Character strings are only C interoperable if they have a | |
1008 | length of 1. */ | |
1009 | if (sym->ts.type == BT_CHARACTER) | |
1010 | { | |
bc21d315 | 1011 | gfc_charlen *cl = sym->ts.u.cl; |
aa5e22f0 CR |
1012 | if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT |
1013 | || mpz_cmp_si (cl->length->value.integer, 1) != 0) | |
1014 | { | |
1015 | gfc_error ("Character argument '%s' at %L " | |
1016 | "must be length 1 because " | |
1017 | "procedure '%s' is BIND(C)", | |
1018 | sym->name, &sym->declared_at, | |
1019 | sym->ns->proc_name->name); | |
1020 | retval = FAILURE; | |
1021 | } | |
1022 | } | |
1023 | ||
a8b3b0b6 CR |
1024 | /* We have to make sure that any param to a bind(c) routine does |
1025 | not have the allocatable, pointer, or optional attributes, | |
1026 | according to J3/04-007, section 5.1. */ | |
1027 | if (sym->attr.allocatable == 1) | |
1028 | { | |
1029 | gfc_error ("Variable '%s' at %L cannot have the " | |
1030 | "ALLOCATABLE attribute because procedure '%s'" | |
1031 | " is BIND(C)", sym->name, &(sym->declared_at), | |
1032 | sym->ns->proc_name->name); | |
1033 | retval = FAILURE; | |
1034 | } | |
1035 | ||
1036 | if (sym->attr.pointer == 1) | |
1037 | { | |
1038 | gfc_error ("Variable '%s' at %L cannot have the " | |
1039 | "POINTER attribute because procedure '%s'" | |
1040 | " is BIND(C)", sym->name, &(sym->declared_at), | |
1041 | sym->ns->proc_name->name); | |
1042 | retval = FAILURE; | |
1043 | } | |
1044 | ||
1045 | if (sym->attr.optional == 1) | |
1046 | { | |
1047 | gfc_error ("Variable '%s' at %L cannot have the " | |
1048 | "OPTIONAL attribute because procedure '%s'" | |
1049 | " is BIND(C)", sym->name, &(sym->declared_at), | |
1050 | sym->ns->proc_name->name); | |
1051 | retval = FAILURE; | |
1052 | } | |
1053 | ||
1054 | /* Make sure that if it has the dimension attribute, that it is | |
1055 | either assumed size or explicit shape. */ | |
1056 | if (sym->as != NULL) | |
1057 | { | |
1058 | if (sym->as->type == AS_ASSUMED_SHAPE) | |
1059 | { | |
1060 | gfc_error ("Assumed-shape array '%s' at %L cannot be an " | |
1061 | "argument to the procedure '%s' at %L because " | |
1062 | "the procedure is BIND(C)", sym->name, | |
1063 | &(sym->declared_at), sym->ns->proc_name->name, | |
1064 | &(sym->ns->proc_name->declared_at)); | |
1065 | retval = FAILURE; | |
1066 | } | |
1067 | ||
1068 | if (sym->as->type == AS_DEFERRED) | |
1069 | { | |
1070 | gfc_error ("Deferred-shape array '%s' at %L cannot be an " | |
1071 | "argument to the procedure '%s' at %L because " | |
1072 | "the procedure is BIND(C)", sym->name, | |
1073 | &(sym->declared_at), sym->ns->proc_name->name, | |
1074 | &(sym->ns->proc_name->declared_at)); | |
1075 | retval = FAILURE; | |
1076 | } | |
1077 | } | |
1078 | } | |
1079 | } | |
1080 | ||
1081 | return retval; | |
1082 | } | |
1083 | ||
1084 | ||
cf2b3c22 | 1085 | |
a8b3b0b6 | 1086 | /* Function called by variable_decl() that adds a name to the symbol table. */ |
6de9cd9a | 1087 | |
17b1d2a0 | 1088 | static gfc_try |
636dff67 SK |
1089 | build_sym (const char *name, gfc_charlen *cl, |
1090 | gfc_array_spec **as, locus *var_locus) | |
6de9cd9a DN |
1091 | { |
1092 | symbol_attribute attr; | |
1093 | gfc_symbol *sym; | |
1094 | ||
9e35b386 | 1095 | if (gfc_get_symbol (name, NULL, &sym)) |
6de9cd9a DN |
1096 | return FAILURE; |
1097 | ||
66e4ab31 | 1098 | /* Start updating the symbol table. Add basic type attribute if present. */ |
6de9cd9a | 1099 | if (current_ts.type != BT_UNKNOWN |
636dff67 SK |
1100 | && (sym->attr.implicit_type == 0 |
1101 | || !gfc_compare_types (&sym->ts, ¤t_ts)) | |
6de9cd9a DN |
1102 | && gfc_add_type (sym, ¤t_ts, var_locus) == FAILURE) |
1103 | return FAILURE; | |
1104 | ||
1105 | if (sym->ts.type == BT_CHARACTER) | |
bc21d315 | 1106 | sym->ts.u.cl = cl; |
6de9cd9a DN |
1107 | |
1108 | /* Add dimension attribute if present. */ | |
1109 | if (gfc_set_array_spec (sym, *as, var_locus) == FAILURE) | |
1110 | return FAILURE; | |
1111 | *as = NULL; | |
1112 | ||
1113 | /* Add attribute to symbol. The copy is so that we can reset the | |
1114 | dimension attribute. */ | |
1115 | attr = current_attr; | |
1116 | attr.dimension = 0; | |
be59db2d | 1117 | attr.codimension = 0; |
6de9cd9a DN |
1118 | |
1119 | if (gfc_copy_attr (&sym->attr, &attr, var_locus) == FAILURE) | |
1120 | return FAILURE; | |
1121 | ||
a8b3b0b6 CR |
1122 | /* Finish any work that may need to be done for the binding label, |
1123 | if it's a bind(c). The bind(c) attr is found before the symbol | |
1124 | is made, and before the symbol name (for data decls), so the | |
1125 | current_ts is holding the binding label, or nothing if the | |
1126 | name= attr wasn't given. Therefore, test here if we're dealing | |
1127 | with a bind(c) and make sure the binding label is set correctly. */ | |
1128 | if (sym->attr.is_bind_c == 1) | |
1129 | { | |
1130 | if (sym->binding_label[0] == '\0') | |
1131 | { | |
ad4a2f64 TB |
1132 | /* Set the binding label and verify that if a NAME= was specified |
1133 | then only one identifier was in the entity-decl-list. */ | |
1134 | if (set_binding_label (sym->binding_label, sym->name, | |
1135 | num_idents_on_line) == FAILURE) | |
a8b3b0b6 CR |
1136 | return FAILURE; |
1137 | } | |
1138 | } | |
1139 | ||
1140 | /* See if we know we're in a common block, and if it's a bind(c) | |
1141 | common then we need to make sure we're an interoperable type. */ | |
1142 | if (sym->attr.in_common == 1) | |
1143 | { | |
1144 | /* Test the common block object. */ | |
1145 | if (sym->common_block != NULL && sym->common_block->is_bind_c == 1 | |
1146 | && sym->ts.is_c_interop != 1) | |
1147 | { | |
1148 | gfc_error_now ("Variable '%s' in common block '%s' at %C " | |
1149 | "must be declared with a C interoperable " | |
1150 | "kind since common block '%s' is BIND(C)", | |
1151 | sym->name, sym->common_block->name, | |
1152 | sym->common_block->name); | |
1153 | gfc_clear_error (); | |
1154 | } | |
1155 | } | |
1156 | ||
9a3db5a3 PT |
1157 | sym->attr.implied_index = 0; |
1158 | ||
d40477b4 JW |
1159 | if (sym->ts.type == BT_CLASS |
1160 | && (sym->attr.class_ok = sym->attr.dummy || sym->attr.pointer | |
1161 | || sym->attr.allocatable)) | |
1162 | gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as, false); | |
cf2b3c22 | 1163 | |
6de9cd9a DN |
1164 | return SUCCESS; |
1165 | } | |
1166 | ||
636dff67 | 1167 | |
df7cc9b5 | 1168 | /* Set character constant to the given length. The constant will be padded or |
d2848082 DK |
1169 | truncated. If we're inside an array constructor without a typespec, we |
1170 | additionally check that all elements have the same length; check_len -1 | |
1171 | means no checking. */ | |
df7cc9b5 FW |
1172 | |
1173 | void | |
d2848082 | 1174 | gfc_set_constant_character_len (int len, gfc_expr *expr, int check_len) |
df7cc9b5 | 1175 | { |
00660189 | 1176 | gfc_char_t *s; |
df7cc9b5 FW |
1177 | int slen; |
1178 | ||
1179 | gcc_assert (expr->expr_type == EXPR_CONSTANT); | |
d393bbd7 | 1180 | gcc_assert (expr->ts.type == BT_CHARACTER); |
df7cc9b5 FW |
1181 | |
1182 | slen = expr->value.character.length; | |
1183 | if (len != slen) | |
1184 | { | |
00660189 FXC |
1185 | s = gfc_get_wide_string (len + 1); |
1186 | memcpy (s, expr->value.character.string, | |
1187 | MIN (len, slen) * sizeof (gfc_char_t)); | |
df7cc9b5 | 1188 | if (len > slen) |
00660189 | 1189 | gfc_wide_memset (&s[slen], ' ', len - slen); |
2220652d PT |
1190 | |
1191 | if (gfc_option.warn_character_truncation && slen > len) | |
1192 | gfc_warning_now ("CHARACTER expression at %L is being truncated " | |
1193 | "(%d/%d)", &expr->where, slen, len); | |
1194 | ||
1195 | /* Apply the standard by 'hand' otherwise it gets cleared for | |
1196 | initializers. */ | |
d2848082 DK |
1197 | if (check_len != -1 && slen != check_len |
1198 | && !(gfc_option.allow_std & GFC_STD_GNU)) | |
2220652d PT |
1199 | gfc_error_now ("The CHARACTER elements of the array constructor " |
1200 | "at %L must have the same length (%d/%d)", | |
d2848082 | 1201 | &expr->where, slen, check_len); |
2220652d | 1202 | |
150675a8 | 1203 | s[len] = '\0'; |
df7cc9b5 FW |
1204 | gfc_free (expr->value.character.string); |
1205 | expr->value.character.string = s; | |
1206 | expr->value.character.length = len; | |
1207 | } | |
1208 | } | |
6de9cd9a | 1209 | |
25d8f0a2 | 1210 | |
d51347f9 | 1211 | /* Function to create and update the enumerator history |
25d8f0a2 | 1212 | using the information passed as arguments. |
d51347f9 TB |
1213 | Pointer "max_enum" is also updated, to point to |
1214 | enum history node containing largest initializer. | |
25d8f0a2 TS |
1215 | |
1216 | SYM points to the symbol node of enumerator. | |
66e4ab31 | 1217 | INIT points to its enumerator value. */ |
25d8f0a2 | 1218 | |
d51347f9 | 1219 | static void |
636dff67 | 1220 | create_enum_history (gfc_symbol *sym, gfc_expr *init) |
25d8f0a2 TS |
1221 | { |
1222 | enumerator_history *new_enum_history; | |
1223 | gcc_assert (sym != NULL && init != NULL); | |
1224 | ||
ece3f663 | 1225 | new_enum_history = XCNEW (enumerator_history); |
25d8f0a2 TS |
1226 | |
1227 | new_enum_history->sym = sym; | |
1228 | new_enum_history->initializer = init; | |
1229 | new_enum_history->next = NULL; | |
1230 | ||
1231 | if (enum_history == NULL) | |
1232 | { | |
1233 | enum_history = new_enum_history; | |
1234 | max_enum = enum_history; | |
1235 | } | |
1236 | else | |
1237 | { | |
1238 | new_enum_history->next = enum_history; | |
1239 | enum_history = new_enum_history; | |
1240 | ||
d51347f9 | 1241 | if (mpz_cmp (max_enum->initializer->value.integer, |
25d8f0a2 | 1242 | new_enum_history->initializer->value.integer) < 0) |
636dff67 | 1243 | max_enum = new_enum_history; |
25d8f0a2 TS |
1244 | } |
1245 | } | |
1246 | ||
1247 | ||
d51347f9 | 1248 | /* Function to free enum kind history. */ |
25d8f0a2 | 1249 | |
d51347f9 | 1250 | void |
636dff67 | 1251 | gfc_free_enum_history (void) |
25d8f0a2 | 1252 | { |
d51347f9 TB |
1253 | enumerator_history *current = enum_history; |
1254 | enumerator_history *next; | |
25d8f0a2 TS |
1255 | |
1256 | while (current != NULL) | |
1257 | { | |
1258 | next = current->next; | |
1259 | gfc_free (current); | |
1260 | current = next; | |
1261 | } | |
1262 | max_enum = NULL; | |
1263 | enum_history = NULL; | |
1264 | } | |
1265 | ||
1266 | ||
6de9cd9a DN |
1267 | /* Function called by variable_decl() that adds an initialization |
1268 | expression to a symbol. */ | |
1269 | ||
17b1d2a0 | 1270 | static gfc_try |
66e4ab31 | 1271 | add_init_expr_to_sym (const char *name, gfc_expr **initp, locus *var_locus) |
6de9cd9a DN |
1272 | { |
1273 | symbol_attribute attr; | |
1274 | gfc_symbol *sym; | |
1275 | gfc_expr *init; | |
1276 | ||
1277 | init = *initp; | |
08a6b8e0 | 1278 | if (find_special (name, &sym, false)) |
6de9cd9a DN |
1279 | return FAILURE; |
1280 | ||
1281 | attr = sym->attr; | |
1282 | ||
1283 | /* If this symbol is confirming an implicit parameter type, | |
1284 | then an initialization expression is not allowed. */ | |
1285 | if (attr.flavor == FL_PARAMETER | |
1286 | && sym->value != NULL | |
1287 | && *initp != NULL) | |
1288 | { | |
1289 | gfc_error ("Initializer not allowed for PARAMETER '%s' at %C", | |
1290 | sym->name); | |
1291 | return FAILURE; | |
1292 | } | |
1293 | ||
1294 | if (init == NULL) | |
1295 | { | |
1296 | /* An initializer is required for PARAMETER declarations. */ | |
1297 | if (attr.flavor == FL_PARAMETER) | |
1298 | { | |
1299 | gfc_error ("PARAMETER at %L is missing an initializer", var_locus); | |
1300 | return FAILURE; | |
1301 | } | |
1302 | } | |
1303 | else | |
1304 | { | |
1305 | /* If a variable appears in a DATA block, it cannot have an | |
1de8a836 | 1306 | initializer. */ |
6de9cd9a DN |
1307 | if (sym->attr.data) |
1308 | { | |
636dff67 SK |
1309 | gfc_error ("Variable '%s' at %C with an initializer already " |
1310 | "appears in a DATA statement", sym->name); | |
6de9cd9a DN |
1311 | return FAILURE; |
1312 | } | |
1313 | ||
75d17889 TS |
1314 | /* Check if the assignment can happen. This has to be put off |
1315 | until later for a derived type variable. */ | |
6de9cd9a | 1316 | if (sym->ts.type != BT_DERIVED && init->ts.type != BT_DERIVED |
cf2b3c22 | 1317 | && sym->ts.type != BT_CLASS && init->ts.type != BT_CLASS |
6de9cd9a DN |
1318 | && gfc_check_assign_symbol (sym, init) == FAILURE) |
1319 | return FAILURE; | |
1320 | ||
bc21d315 | 1321 | if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl |
51b128a0 | 1322 | && init->ts.type == BT_CHARACTER) |
df7cc9b5 FW |
1323 | { |
1324 | /* Update symbol character length according initializer. */ | |
51b128a0 PT |
1325 | if (gfc_check_assign_symbol (sym, init) == FAILURE) |
1326 | return FAILURE; | |
1327 | ||
bc21d315 | 1328 | if (sym->ts.u.cl->length == NULL) |
df7cc9b5 | 1329 | { |
a99288e5 | 1330 | int clen; |
66e4ab31 SK |
1331 | /* If there are multiple CHARACTER variables declared on the |
1332 | same line, we don't want them to share the same length. */ | |
b76e28c6 | 1333 | sym->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
96f4873b | 1334 | |
a99288e5 PT |
1335 | if (sym->attr.flavor == FL_PARAMETER) |
1336 | { | |
1337 | if (init->expr_type == EXPR_CONSTANT) | |
1338 | { | |
1339 | clen = init->value.character.length; | |
b7e75771 JD |
1340 | sym->ts.u.cl->length |
1341 | = gfc_get_int_expr (gfc_default_integer_kind, | |
1342 | NULL, clen); | |
a99288e5 PT |
1343 | } |
1344 | else if (init->expr_type == EXPR_ARRAY) | |
1345 | { | |
b7e75771 JD |
1346 | gfc_constructor *c; |
1347 | c = gfc_constructor_first (init->value.constructor); | |
1348 | clen = c->expr->value.character.length; | |
1349 | sym->ts.u.cl->length | |
1350 | = gfc_get_int_expr (gfc_default_integer_kind, | |
1351 | NULL, clen); | |
a99288e5 | 1352 | } |
bc21d315 JW |
1353 | else if (init->ts.u.cl && init->ts.u.cl->length) |
1354 | sym->ts.u.cl->length = | |
1355 | gfc_copy_expr (sym->value->ts.u.cl->length); | |
a99288e5 | 1356 | } |
df7cc9b5 FW |
1357 | } |
1358 | /* Update initializer character length according symbol. */ | |
bc21d315 | 1359 | else if (sym->ts.u.cl->length->expr_type == EXPR_CONSTANT) |
df7cc9b5 | 1360 | { |
bc21d315 | 1361 | int len = mpz_get_si (sym->ts.u.cl->length->value.integer); |
df7cc9b5 FW |
1362 | |
1363 | if (init->expr_type == EXPR_CONSTANT) | |
d2848082 | 1364 | gfc_set_constant_character_len (len, init, -1); |
df7cc9b5 FW |
1365 | else if (init->expr_type == EXPR_ARRAY) |
1366 | { | |
b7e75771 JD |
1367 | gfc_constructor *c; |
1368 | ||
dcdc7b6c PT |
1369 | /* Build a new charlen to prevent simplification from |
1370 | deleting the length before it is resolved. */ | |
b76e28c6 | 1371 | init->ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
bc21d315 | 1372 | init->ts.u.cl->length = gfc_copy_expr (sym->ts.u.cl->length); |
dcdc7b6c | 1373 | |
b7e75771 JD |
1374 | for (c = gfc_constructor_first (init->value.constructor); |
1375 | c; c = gfc_constructor_next (c)) | |
1376 | gfc_set_constant_character_len (len, c->expr, -1); | |
df7cc9b5 FW |
1377 | } |
1378 | } | |
1379 | } | |
1380 | ||
f5ca06e6 DK |
1381 | /* If sym is implied-shape, set its upper bounds from init. */ |
1382 | if (sym->attr.flavor == FL_PARAMETER && sym->attr.dimension | |
1383 | && sym->as->type == AS_IMPLIED_SHAPE) | |
1384 | { | |
1385 | int dim; | |
1386 | ||
1387 | if (init->rank == 0) | |
1388 | { | |
1389 | gfc_error ("Can't initialize implied-shape array at %L" | |
1390 | " with scalar", &sym->declared_at); | |
1391 | return FAILURE; | |
1392 | } | |
1393 | gcc_assert (sym->as->rank == init->rank); | |
1394 | ||
1395 | /* Shape should be present, we get an initialization expression. */ | |
1396 | gcc_assert (init->shape); | |
1397 | ||
1398 | for (dim = 0; dim < sym->as->rank; ++dim) | |
1399 | { | |
1400 | int k; | |
1401 | gfc_expr* lower; | |
1402 | gfc_expr* e; | |
1403 | ||
1404 | lower = sym->as->lower[dim]; | |
1405 | if (lower->expr_type != EXPR_CONSTANT) | |
1406 | { | |
1407 | gfc_error ("Non-constant lower bound in implied-shape" | |
1408 | " declaration at %L", &lower->where); | |
1409 | return FAILURE; | |
1410 | } | |
1411 | ||
1412 | /* All dimensions must be without upper bound. */ | |
1413 | gcc_assert (!sym->as->upper[dim]); | |
1414 | ||
1415 | k = lower->ts.kind; | |
1416 | e = gfc_get_constant_expr (BT_INTEGER, k, &sym->declared_at); | |
1417 | mpz_add (e->value.integer, | |
1418 | lower->value.integer, init->shape[dim]); | |
1419 | mpz_sub_ui (e->value.integer, e->value.integer, 1); | |
1420 | sym->as->upper[dim] = e; | |
1421 | } | |
1422 | ||
1423 | sym->as->type = AS_EXPLICIT; | |
1424 | } | |
1425 | ||
a8b3b0b6 CR |
1426 | /* Need to check if the expression we initialized this |
1427 | to was one of the iso_c_binding named constants. If so, | |
1428 | and we're a parameter (constant), let it be iso_c. | |
1429 | For example: | |
1430 | integer(c_int), parameter :: my_int = c_int | |
1431 | integer(my_int) :: my_int_2 | |
1432 | If we mark my_int as iso_c (since we can see it's value | |
1433 | is equal to one of the named constants), then my_int_2 | |
1434 | will be considered C interoperable. */ | |
1435 | if (sym->ts.type != BT_CHARACTER && sym->ts.type != BT_DERIVED) | |
1436 | { | |
1437 | sym->ts.is_iso_c |= init->ts.is_iso_c; | |
1438 | sym->ts.is_c_interop |= init->ts.is_c_interop; | |
1439 | /* attr bits needed for module files. */ | |
1440 | sym->attr.is_iso_c |= init->ts.is_iso_c; | |
1441 | sym->attr.is_c_interop |= init->ts.is_c_interop; | |
1442 | if (init->ts.is_iso_c) | |
1443 | sym->ts.f90_type = init->ts.f90_type; | |
1444 | } | |
b7e75771 | 1445 | |
6de9cd9a DN |
1446 | /* Add initializer. Make sure we keep the ranks sane. */ |
1447 | if (sym->attr.dimension && init->rank == 0) | |
a9b43781 PT |
1448 | { |
1449 | mpz_t size; | |
1450 | gfc_expr *array; | |
a9b43781 PT |
1451 | int n; |
1452 | if (sym->attr.flavor == FL_PARAMETER | |
1453 | && init->expr_type == EXPR_CONSTANT | |
1454 | && spec_size (sym->as, &size) == SUCCESS | |
1455 | && mpz_cmp_si (size, 0) > 0) | |
1456 | { | |
b7e75771 JD |
1457 | array = gfc_get_array_expr (init->ts.type, init->ts.kind, |
1458 | &init->where); | |
a9b43781 | 1459 | for (n = 0; n < (int)mpz_get_si (size); n++) |
b7e75771 JD |
1460 | gfc_constructor_append_expr (&array->value.constructor, |
1461 | n == 0 | |
1462 | ? init | |
1463 | : gfc_copy_expr (init), | |
1464 | &init->where); | |
1465 | ||
a9b43781 PT |
1466 | array->shape = gfc_get_shape (sym->as->rank); |
1467 | for (n = 0; n < sym->as->rank; n++) | |
1468 | spec_dimen_size (sym->as, n, &array->shape[n]); | |
1469 | ||
1470 | init = array; | |
1471 | mpz_clear (size); | |
1472 | } | |
1473 | init->rank = sym->as->rank; | |
1474 | } | |
6de9cd9a DN |
1475 | |
1476 | sym->value = init; | |
ef7236d2 DF |
1477 | if (sym->attr.save == SAVE_NONE) |
1478 | sym->attr.save = SAVE_IMPLICIT; | |
6de9cd9a DN |
1479 | *initp = NULL; |
1480 | } | |
1481 | ||
1482 | return SUCCESS; | |
1483 | } | |
1484 | ||
1485 | ||
1486 | /* Function called by variable_decl() that adds a name to a structure | |
1487 | being built. */ | |
1488 | ||
17b1d2a0 | 1489 | static gfc_try |
636dff67 SK |
1490 | build_struct (const char *name, gfc_charlen *cl, gfc_expr **init, |
1491 | gfc_array_spec **as) | |
6de9cd9a DN |
1492 | { |
1493 | gfc_component *c; | |
2e23972e | 1494 | gfc_try t = SUCCESS; |
6de9cd9a | 1495 | |
619dd721 | 1496 | /* F03:C438/C439. If the current symbol is of the same derived type that we're |
6de9cd9a | 1497 | constructing, it must have the pointer attribute. */ |
619dd721 | 1498 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
bc21d315 | 1499 | && current_ts.u.derived == gfc_current_block () |
6de9cd9a DN |
1500 | && current_attr.pointer == 0) |
1501 | { | |
1502 | gfc_error ("Component at %C must have the POINTER attribute"); | |
1503 | return FAILURE; | |
1504 | } | |
1505 | ||
636dff67 | 1506 | if (gfc_current_block ()->attr.pointer && (*as)->rank != 0) |
6de9cd9a DN |
1507 | { |
1508 | if ((*as)->type != AS_DEFERRED && (*as)->type != AS_EXPLICIT) | |
1509 | { | |
1510 | gfc_error ("Array component of structure at %C must have explicit " | |
1511 | "or deferred shape"); | |
1512 | return FAILURE; | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
1517 | return FAILURE; | |
1518 | ||
1519 | c->ts = current_ts; | |
bc21d315 JW |
1520 | if (c->ts.type == BT_CHARACTER) |
1521 | c->ts.u.cl = cl; | |
d4b7d0f0 | 1522 | c->attr = current_attr; |
6de9cd9a DN |
1523 | |
1524 | c->initializer = *init; | |
1525 | *init = NULL; | |
1526 | ||
1527 | c->as = *as; | |
1528 | if (c->as != NULL) | |
be59db2d TB |
1529 | { |
1530 | if (c->as->corank) | |
1531 | c->attr.codimension = 1; | |
1532 | if (c->as->rank) | |
1533 | c->attr.dimension = 1; | |
1534 | } | |
6de9cd9a DN |
1535 | *as = NULL; |
1536 | ||
28d08315 PT |
1537 | /* Should this ever get more complicated, combine with similar section |
1538 | in add_init_expr_to_sym into a separate function. */ | |
bc21d315 JW |
1539 | if (c->ts.type == BT_CHARACTER && !c->attr.pointer && c->initializer && c->ts.u.cl |
1540 | && c->ts.u.cl->length && c->ts.u.cl->length->expr_type == EXPR_CONSTANT) | |
28d08315 | 1541 | { |
d2848082 DK |
1542 | int len; |
1543 | ||
bc21d315 JW |
1544 | gcc_assert (c->ts.u.cl && c->ts.u.cl->length); |
1545 | gcc_assert (c->ts.u.cl->length->expr_type == EXPR_CONSTANT); | |
1546 | gcc_assert (c->ts.u.cl->length->ts.type == BT_INTEGER); | |
d2848082 | 1547 | |
bc21d315 | 1548 | len = mpz_get_si (c->ts.u.cl->length->value.integer); |
28d08315 PT |
1549 | |
1550 | if (c->initializer->expr_type == EXPR_CONSTANT) | |
d2848082 | 1551 | gfc_set_constant_character_len (len, c->initializer, -1); |
bc21d315 JW |
1552 | else if (mpz_cmp (c->ts.u.cl->length->value.integer, |
1553 | c->initializer->ts.u.cl->length->value.integer)) | |
28d08315 | 1554 | { |
b7e75771 JD |
1555 | gfc_constructor *ctor; |
1556 | ctor = gfc_constructor_first (c->initializer->value.constructor); | |
d2848082 | 1557 | |
2f4d1994 | 1558 | if (ctor) |
d2848082 | 1559 | { |
2f4d1994 | 1560 | int first_len; |
b7e75771 JD |
1561 | bool has_ts = (c->initializer->ts.u.cl |
1562 | && c->initializer->ts.u.cl->length_from_typespec); | |
2f4d1994 ILT |
1563 | |
1564 | /* Remember the length of the first element for checking | |
1565 | that all elements *in the constructor* have the same | |
1566 | length. This need not be the length of the LHS! */ | |
1567 | gcc_assert (ctor->expr->expr_type == EXPR_CONSTANT); | |
1568 | gcc_assert (ctor->expr->ts.type == BT_CHARACTER); | |
1569 | first_len = ctor->expr->value.character.length; | |
1570 | ||
b7e75771 JD |
1571 | for ( ; ctor; ctor = gfc_constructor_next (ctor)) |
1572 | if (ctor->expr->expr_type == EXPR_CONSTANT) | |
d2848082 | 1573 | { |
b7e75771 JD |
1574 | gfc_set_constant_character_len (len, ctor->expr, |
1575 | has_ts ? -1 : first_len); | |
1576 | ctor->expr->ts.u.cl->length = gfc_copy_expr (c->ts.u.cl->length); | |
d2848082 | 1577 | } |
d2848082 | 1578 | } |
28d08315 PT |
1579 | } |
1580 | } | |
1581 | ||
6de9cd9a | 1582 | /* Check array components. */ |
d4b7d0f0 | 1583 | if (!c->attr.dimension) |
2e23972e | 1584 | goto scalar; |
6de9cd9a | 1585 | |
d4b7d0f0 | 1586 | if (c->attr.pointer) |
6de9cd9a DN |
1587 | { |
1588 | if (c->as->type != AS_DEFERRED) | |
1589 | { | |
5046aff5 PT |
1590 | gfc_error ("Pointer array component of structure at %C must have a " |
1591 | "deferred shape"); | |
2e23972e | 1592 | t = FAILURE; |
5046aff5 PT |
1593 | } |
1594 | } | |
d4b7d0f0 | 1595 | else if (c->attr.allocatable) |
5046aff5 PT |
1596 | { |
1597 | if (c->as->type != AS_DEFERRED) | |
1598 | { | |
1599 | gfc_error ("Allocatable component of structure at %C must have a " | |
1600 | "deferred shape"); | |
2e23972e | 1601 | t = FAILURE; |
6de9cd9a DN |
1602 | } |
1603 | } | |
1604 | else | |
1605 | { | |
1606 | if (c->as->type != AS_EXPLICIT) | |
1607 | { | |
636dff67 SK |
1608 | gfc_error ("Array component of structure at %C must have an " |
1609 | "explicit shape"); | |
2e23972e | 1610 | t = FAILURE; |
6de9cd9a DN |
1611 | } |
1612 | } | |
1613 | ||
2e23972e JW |
1614 | scalar: |
1615 | if (c->ts.type == BT_CLASS) | |
eece1eb9 | 1616 | gfc_build_class_symbol (&c->ts, &c->attr, &c->as, true); |
2e23972e JW |
1617 | |
1618 | return t; | |
6de9cd9a DN |
1619 | } |
1620 | ||
1621 | ||
1622 | /* Match a 'NULL()', and possibly take care of some side effects. */ | |
1623 | ||
1624 | match | |
636dff67 | 1625 | gfc_match_null (gfc_expr **result) |
6de9cd9a DN |
1626 | { |
1627 | gfc_symbol *sym; | |
6de9cd9a DN |
1628 | match m; |
1629 | ||
1630 | m = gfc_match (" null ( )"); | |
1631 | if (m != MATCH_YES) | |
1632 | return m; | |
1633 | ||
1634 | /* The NULL symbol now has to be/become an intrinsic function. */ | |
1635 | if (gfc_get_symbol ("null", NULL, &sym)) | |
1636 | { | |
1637 | gfc_error ("NULL() initialization at %C is ambiguous"); | |
1638 | return MATCH_ERROR; | |
1639 | } | |
1640 | ||
1641 | gfc_intrinsic_symbol (sym); | |
1642 | ||
1643 | if (sym->attr.proc != PROC_INTRINSIC | |
231b2fcc TS |
1644 | && (gfc_add_procedure (&sym->attr, PROC_INTRINSIC, |
1645 | sym->name, NULL) == FAILURE | |
1646 | || gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE)) | |
6de9cd9a DN |
1647 | return MATCH_ERROR; |
1648 | ||
b7e75771 | 1649 | *result = gfc_get_null_expr (&gfc_current_locus); |
6de9cd9a DN |
1650 | |
1651 | return MATCH_YES; | |
1652 | } | |
1653 | ||
1654 | ||
6de9cd9a DN |
1655 | /* Match a variable name with an optional initializer. When this |
1656 | subroutine is called, a variable is expected to be parsed next. | |
1657 | Depending on what is happening at the moment, updates either the | |
1658 | symbol table or the current interface. */ | |
1659 | ||
1660 | static match | |
949d5b72 | 1661 | variable_decl (int elem) |
6de9cd9a DN |
1662 | { |
1663 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1664 | gfc_expr *initializer, *char_len; | |
1665 | gfc_array_spec *as; | |
83d890b9 | 1666 | gfc_array_spec *cp_as; /* Extra copy for Cray Pointees. */ |
6de9cd9a DN |
1667 | gfc_charlen *cl; |
1668 | locus var_locus; | |
1669 | match m; | |
17b1d2a0 | 1670 | gfc_try t; |
83d890b9 | 1671 | gfc_symbol *sym; |
6de9cd9a DN |
1672 | |
1673 | initializer = NULL; | |
1674 | as = NULL; | |
83d890b9 | 1675 | cp_as = NULL; |
6de9cd9a DN |
1676 | |
1677 | /* When we get here, we've just matched a list of attributes and | |
1678 | maybe a type and a double colon. The next thing we expect to see | |
1679 | is the name of the symbol. */ | |
1680 | m = gfc_match_name (name); | |
1681 | if (m != MATCH_YES) | |
1682 | goto cleanup; | |
1683 | ||
63645982 | 1684 | var_locus = gfc_current_locus; |
6de9cd9a DN |
1685 | |
1686 | /* Now we could see the optional array spec. or character length. */ | |
be59db2d | 1687 | m = gfc_match_array_spec (&as, true, true); |
83d890b9 AL |
1688 | if (gfc_option.flag_cray_pointer && m == MATCH_YES) |
1689 | cp_as = gfc_copy_array_spec (as); | |
1690 | else if (m == MATCH_ERROR) | |
6de9cd9a | 1691 | goto cleanup; |
25d8f0a2 | 1692 | |
6de9cd9a DN |
1693 | if (m == MATCH_NO) |
1694 | as = gfc_copy_array_spec (current_as); | |
d3a9eea2 TB |
1695 | else if (current_as) |
1696 | merge_array_spec (current_as, as, true); | |
6de9cd9a | 1697 | |
f5ca06e6 DK |
1698 | /* At this point, we know for sure if the symbol is PARAMETER and can thus |
1699 | determine (and check) whether it can be implied-shape. If it | |
1700 | was parsed as assumed-size, change it because PARAMETERs can not | |
1701 | be assumed-size. */ | |
1702 | if (as) | |
1703 | { | |
1704 | if (as->type == AS_IMPLIED_SHAPE && current_attr.flavor != FL_PARAMETER) | |
1705 | { | |
1706 | m = MATCH_ERROR; | |
1707 | gfc_error ("Non-PARAMETER symbol '%s' at %L can't be implied-shape", | |
1708 | name, &var_locus); | |
1709 | goto cleanup; | |
1710 | } | |
1711 | ||
1712 | if (as->type == AS_ASSUMED_SIZE && as->rank == 1 | |
1713 | && current_attr.flavor == FL_PARAMETER) | |
1714 | as->type = AS_IMPLIED_SHAPE; | |
1715 | ||
1716 | if (as->type == AS_IMPLIED_SHAPE | |
1717 | && gfc_notify_std (GFC_STD_F2008, | |
1718 | "Fortran 2008: Implied-shape array at %L", | |
1719 | &var_locus) == FAILURE) | |
1720 | { | |
1721 | m = MATCH_ERROR; | |
1722 | goto cleanup; | |
1723 | } | |
1724 | } | |
1725 | ||
6de9cd9a DN |
1726 | char_len = NULL; |
1727 | cl = NULL; | |
1728 | ||
1729 | if (current_ts.type == BT_CHARACTER) | |
1730 | { | |
1731 | switch (match_char_length (&char_len)) | |
1732 | { | |
1733 | case MATCH_YES: | |
b76e28c6 | 1734 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
6de9cd9a DN |
1735 | |
1736 | cl->length = char_len; | |
1737 | break; | |
1738 | ||
949d5b72 | 1739 | /* Non-constant lengths need to be copied after the first |
9b21a380 | 1740 | element. Also copy assumed lengths. */ |
6de9cd9a | 1741 | case MATCH_NO: |
9b21a380 | 1742 | if (elem > 1 |
bc21d315 JW |
1743 | && (current_ts.u.cl->length == NULL |
1744 | || current_ts.u.cl->length->expr_type != EXPR_CONSTANT)) | |
949d5b72 | 1745 | { |
b76e28c6 | 1746 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
bc21d315 | 1747 | cl->length = gfc_copy_expr (current_ts.u.cl->length); |
949d5b72 PT |
1748 | } |
1749 | else | |
bc21d315 | 1750 | cl = current_ts.u.cl; |
949d5b72 | 1751 | |
6de9cd9a DN |
1752 | break; |
1753 | ||
1754 | case MATCH_ERROR: | |
1755 | goto cleanup; | |
1756 | } | |
1757 | } | |
1758 | ||
83d890b9 | 1759 | /* If this symbol has already shown up in a Cray Pointer declaration, |
66e4ab31 | 1760 | then we want to set the type & bail out. */ |
83d890b9 AL |
1761 | if (gfc_option.flag_cray_pointer) |
1762 | { | |
1763 | gfc_find_symbol (name, gfc_current_ns, 1, &sym); | |
1764 | if (sym != NULL && sym->attr.cray_pointee) | |
1765 | { | |
1766 | sym->ts.type = current_ts.type; | |
1767 | sym->ts.kind = current_ts.kind; | |
bc21d315 JW |
1768 | sym->ts.u.cl = cl; |
1769 | sym->ts.u.derived = current_ts.u.derived; | |
a8b3b0b6 CR |
1770 | sym->ts.is_c_interop = current_ts.is_c_interop; |
1771 | sym->ts.is_iso_c = current_ts.is_iso_c; | |
83d890b9 AL |
1772 | m = MATCH_YES; |
1773 | ||
1774 | /* Check to see if we have an array specification. */ | |
1775 | if (cp_as != NULL) | |
1776 | { | |
1777 | if (sym->as != NULL) | |
1778 | { | |
e25a0da3 | 1779 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
83d890b9 AL |
1780 | gfc_free_array_spec (cp_as); |
1781 | m = MATCH_ERROR; | |
1782 | goto cleanup; | |
1783 | } | |
1784 | else | |
1785 | { | |
1786 | if (gfc_set_array_spec (sym, cp_as, &var_locus) == FAILURE) | |
1787 | gfc_internal_error ("Couldn't set pointee array spec."); | |
d51347f9 | 1788 | |
83d890b9 | 1789 | /* Fix the array spec. */ |
d51347f9 | 1790 | m = gfc_mod_pointee_as (sym->as); |
83d890b9 AL |
1791 | if (m == MATCH_ERROR) |
1792 | goto cleanup; | |
1793 | } | |
d51347f9 | 1794 | } |
83d890b9 AL |
1795 | goto cleanup; |
1796 | } | |
1797 | else | |
1798 | { | |
1799 | gfc_free_array_spec (cp_as); | |
1800 | } | |
1801 | } | |
d51347f9 | 1802 | |
3070bab4 JW |
1803 | /* Procedure pointer as function result. */ |
1804 | if (gfc_current_state () == COMP_FUNCTION | |
1805 | && strcmp ("ppr@", gfc_current_block ()->name) == 0 | |
1806 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) == 0) | |
1807 | strcpy (name, "ppr@"); | |
1808 | ||
1809 | if (gfc_current_state () == COMP_FUNCTION | |
1810 | && strcmp (name, gfc_current_block ()->name) == 0 | |
1811 | && gfc_current_block ()->result | |
1812 | && strcmp ("ppr@", gfc_current_block ()->result->name) == 0) | |
1813 | strcpy (name, "ppr@"); | |
d51347f9 | 1814 | |
6de9cd9a DN |
1815 | /* OK, we've successfully matched the declaration. Now put the |
1816 | symbol in the current namespace, because it might be used in the | |
69de3b83 | 1817 | optional initialization expression for this symbol, e.g. this is |
6de9cd9a DN |
1818 | perfectly legal: |
1819 | ||
1820 | integer, parameter :: i = huge(i) | |
1821 | ||
1822 | This is only true for parameters or variables of a basic type. | |
1823 | For components of derived types, it is not true, so we don't | |
1824 | create a symbol for those yet. If we fail to create the symbol, | |
1825 | bail out. */ | |
1826 | if (gfc_current_state () != COMP_DERIVED | |
1827 | && build_sym (name, cl, &as, &var_locus) == FAILURE) | |
1828 | { | |
72af9f0b PT |
1829 | m = MATCH_ERROR; |
1830 | goto cleanup; | |
1831 | } | |
1832 | ||
6133c68a TS |
1833 | /* An interface body specifies all of the procedure's |
1834 | characteristics and these shall be consistent with those | |
1835 | specified in the procedure definition, except that the interface | |
1836 | may specify a procedure that is not pure if the procedure is | |
1837 | defined to be pure(12.3.2). */ | |
d646bbce | 1838 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
636dff67 SK |
1839 | && gfc_current_ns->proc_name |
1840 | && gfc_current_ns->proc_name->attr.if_source == IFSRC_IFBODY | |
bc21d315 | 1841 | && current_ts.u.derived->ns != gfc_current_ns) |
5a8af0b4 PT |
1842 | { |
1843 | gfc_symtree *st; | |
bc21d315 JW |
1844 | st = gfc_find_symtree (gfc_current_ns->sym_root, current_ts.u.derived->name); |
1845 | if (!(current_ts.u.derived->attr.imported | |
5a8af0b4 | 1846 | && st != NULL |
bc21d315 | 1847 | && st->n.sym == current_ts.u.derived) |
5a8af0b4 PT |
1848 | && !gfc_current_ns->has_import_set) |
1849 | { | |
1850 | gfc_error ("the type of '%s' at %C has not been declared within the " | |
1851 | "interface", name); | |
1852 | m = MATCH_ERROR; | |
1853 | goto cleanup; | |
1854 | } | |
6de9cd9a DN |
1855 | } |
1856 | ||
1857 | /* In functions that have a RESULT variable defined, the function | |
1858 | name always refers to function calls. Therefore, the name is | |
1859 | not allowed to appear in specification statements. */ | |
1860 | if (gfc_current_state () == COMP_FUNCTION | |
1861 | && gfc_current_block () != NULL | |
1862 | && gfc_current_block ()->result != NULL | |
1863 | && gfc_current_block ()->result != gfc_current_block () | |
1864 | && strcmp (gfc_current_block ()->name, name) == 0) | |
1865 | { | |
1866 | gfc_error ("Function name '%s' not allowed at %C", name); | |
1867 | m = MATCH_ERROR; | |
1868 | goto cleanup; | |
1869 | } | |
1870 | ||
294fbfc8 TS |
1871 | /* We allow old-style initializations of the form |
1872 | integer i /2/, j(4) /3*3, 1/ | |
1873 | (if no colon has been seen). These are different from data | |
1874 | statements in that initializers are only allowed to apply to the | |
1875 | variable immediately preceding, i.e. | |
1876 | integer i, j /1, 2/ | |
1877 | is not allowed. Therefore we have to do some work manually, that | |
75d17889 | 1878 | could otherwise be left to the matchers for DATA statements. */ |
294fbfc8 TS |
1879 | |
1880 | if (!colon_seen && gfc_match (" /") == MATCH_YES) | |
1881 | { | |
1882 | if (gfc_notify_std (GFC_STD_GNU, "Extension: Old-style " | |
1883 | "initialization at %C") == FAILURE) | |
1884 | return MATCH_ERROR; | |
d51347f9 | 1885 | |
294fbfc8 TS |
1886 | return match_old_style_init (name); |
1887 | } | |
1888 | ||
6de9cd9a DN |
1889 | /* The double colon must be present in order to have initializers. |
1890 | Otherwise the statement is ambiguous with an assignment statement. */ | |
1891 | if (colon_seen) | |
1892 | { | |
1893 | if (gfc_match (" =>") == MATCH_YES) | |
1894 | { | |
6de9cd9a DN |
1895 | if (!current_attr.pointer) |
1896 | { | |
1897 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
1898 | m = MATCH_ERROR; | |
1899 | goto cleanup; | |
1900 | } | |
1901 | ||
1902 | m = gfc_match_null (&initializer); | |
1903 | if (m == MATCH_NO) | |
1904 | { | |
def66134 | 1905 | gfc_error ("Pointer initialization requires a NULL() at %C"); |
6de9cd9a DN |
1906 | m = MATCH_ERROR; |
1907 | } | |
1908 | ||
26d3d4f4 | 1909 | if (gfc_pure (NULL) && gfc_state_stack->state != COMP_DERIVED) |
6de9cd9a | 1910 | { |
636dff67 SK |
1911 | gfc_error ("Initialization of pointer at %C is not allowed in " |
1912 | "a PURE procedure"); | |
6de9cd9a DN |
1913 | m = MATCH_ERROR; |
1914 | } | |
1915 | ||
1916 | if (m != MATCH_YES) | |
1917 | goto cleanup; | |
1918 | ||
6de9cd9a DN |
1919 | } |
1920 | else if (gfc_match_char ('=') == MATCH_YES) | |
1921 | { | |
1922 | if (current_attr.pointer) | |
1923 | { | |
636dff67 SK |
1924 | gfc_error ("Pointer initialization at %C requires '=>', " |
1925 | "not '='"); | |
6de9cd9a DN |
1926 | m = MATCH_ERROR; |
1927 | goto cleanup; | |
1928 | } | |
1929 | ||
1930 | m = gfc_match_init_expr (&initializer); | |
1931 | if (m == MATCH_NO) | |
1932 | { | |
1933 | gfc_error ("Expected an initialization expression at %C"); | |
1934 | m = MATCH_ERROR; | |
1935 | } | |
1936 | ||
ade20620 TB |
1937 | if (current_attr.flavor != FL_PARAMETER && gfc_pure (NULL) |
1938 | && gfc_state_stack->state != COMP_DERIVED) | |
6de9cd9a | 1939 | { |
636dff67 SK |
1940 | gfc_error ("Initialization of variable at %C is not allowed in " |
1941 | "a PURE procedure"); | |
6de9cd9a DN |
1942 | m = MATCH_ERROR; |
1943 | } | |
1944 | ||
1945 | if (m != MATCH_YES) | |
1946 | goto cleanup; | |
1947 | } | |
cb44ab82 VL |
1948 | } |
1949 | ||
5046aff5 PT |
1950 | if (initializer != NULL && current_attr.allocatable |
1951 | && gfc_current_state () == COMP_DERIVED) | |
1952 | { | |
636dff67 SK |
1953 | gfc_error ("Initialization of allocatable component at %C is not " |
1954 | "allowed"); | |
5046aff5 PT |
1955 | m = MATCH_ERROR; |
1956 | goto cleanup; | |
1957 | } | |
1958 | ||
54b4ba60 | 1959 | /* Add the initializer. Note that it is fine if initializer is |
6de9cd9a DN |
1960 | NULL here, because we sometimes also need to check if a |
1961 | declaration *must* have an initialization expression. */ | |
1962 | if (gfc_current_state () != COMP_DERIVED) | |
1963 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
1964 | else | |
54b4ba60 | 1965 | { |
5046aff5 | 1966 | if (current_ts.type == BT_DERIVED |
636dff67 | 1967 | && !current_attr.pointer && !initializer) |
54b4ba60 PB |
1968 | initializer = gfc_default_initializer (¤t_ts); |
1969 | t = build_struct (name, cl, &initializer, &as); | |
1970 | } | |
6de9cd9a DN |
1971 | |
1972 | m = (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
1973 | ||
1974 | cleanup: | |
1975 | /* Free stuff up and return. */ | |
1976 | gfc_free_expr (initializer); | |
1977 | gfc_free_array_spec (as); | |
1978 | ||
1979 | return m; | |
1980 | } | |
1981 | ||
1982 | ||
b2b81a3f BM |
1983 | /* Match an extended-f77 "TYPESPEC*bytesize"-style kind specification. |
1984 | This assumes that the byte size is equal to the kind number for | |
1985 | non-COMPLEX types, and equal to twice the kind number for COMPLEX. */ | |
6de9cd9a DN |
1986 | |
1987 | match | |
636dff67 | 1988 | gfc_match_old_kind_spec (gfc_typespec *ts) |
6de9cd9a DN |
1989 | { |
1990 | match m; | |
5cf54585 | 1991 | int original_kind; |
6de9cd9a DN |
1992 | |
1993 | if (gfc_match_char ('*') != MATCH_YES) | |
1994 | return MATCH_NO; | |
1995 | ||
5cf54585 | 1996 | m = gfc_match_small_literal_int (&ts->kind, NULL); |
6de9cd9a DN |
1997 | if (m != MATCH_YES) |
1998 | return MATCH_ERROR; | |
1999 | ||
e45b3c75 ES |
2000 | original_kind = ts->kind; |
2001 | ||
6de9cd9a | 2002 | /* Massage the kind numbers for complex types. */ |
e45b3c75 ES |
2003 | if (ts->type == BT_COMPLEX) |
2004 | { | |
2005 | if (ts->kind % 2) | |
636dff67 SK |
2006 | { |
2007 | gfc_error ("Old-style type declaration %s*%d not supported at %C", | |
2008 | gfc_basic_typename (ts->type), original_kind); | |
2009 | return MATCH_ERROR; | |
2010 | } | |
e45b3c75 ES |
2011 | ts->kind /= 2; |
2012 | } | |
6de9cd9a | 2013 | |
e7a2d5fb | 2014 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a | 2015 | { |
e45b3c75 | 2016 | gfc_error ("Old-style type declaration %s*%d not supported at %C", |
636dff67 | 2017 | gfc_basic_typename (ts->type), original_kind); |
6de9cd9a DN |
2018 | return MATCH_ERROR; |
2019 | } | |
2020 | ||
df8652dc SK |
2021 | if (gfc_notify_std (GFC_STD_GNU, "Nonstandard type declaration %s*%d at %C", |
2022 | gfc_basic_typename (ts->type), original_kind) == FAILURE) | |
2023 | return MATCH_ERROR; | |
2024 | ||
6de9cd9a DN |
2025 | return MATCH_YES; |
2026 | } | |
2027 | ||
2028 | ||
2029 | /* Match a kind specification. Since kinds are generally optional, we | |
2030 | usually return MATCH_NO if something goes wrong. If a "kind=" | |
2031 | string is found, then we know we have an error. */ | |
2032 | ||
2033 | match | |
e2d29968 | 2034 | gfc_match_kind_spec (gfc_typespec *ts, bool kind_expr_only) |
6de9cd9a | 2035 | { |
e2d29968 | 2036 | locus where, loc; |
6de9cd9a DN |
2037 | gfc_expr *e; |
2038 | match m, n; | |
96ee3a4a | 2039 | char c; |
6de9cd9a DN |
2040 | const char *msg; |
2041 | ||
2042 | m = MATCH_NO; | |
e2d29968 | 2043 | n = MATCH_YES; |
6de9cd9a DN |
2044 | e = NULL; |
2045 | ||
e2d29968 PT |
2046 | where = loc = gfc_current_locus; |
2047 | ||
2048 | if (kind_expr_only) | |
2049 | goto kind_expr; | |
6de9cd9a DN |
2050 | |
2051 | if (gfc_match_char ('(') == MATCH_NO) | |
2052 | return MATCH_NO; | |
2053 | ||
2054 | /* Also gobbles optional text. */ | |
2055 | if (gfc_match (" kind = ") == MATCH_YES) | |
2056 | m = MATCH_ERROR; | |
2057 | ||
e2d29968 PT |
2058 | loc = gfc_current_locus; |
2059 | ||
2060 | kind_expr: | |
6de9cd9a | 2061 | n = gfc_match_init_expr (&e); |
e2d29968 | 2062 | |
6de9cd9a | 2063 | if (n != MATCH_YES) |
e2d29968 | 2064 | { |
1c8bcdf7 | 2065 | if (gfc_matching_function) |
e2d29968 | 2066 | { |
1c8bcdf7 PT |
2067 | /* The function kind expression might include use associated or |
2068 | imported parameters and try again after the specification | |
2069 | expressions..... */ | |
e2d29968 PT |
2070 | if (gfc_match_char (')') != MATCH_YES) |
2071 | { | |
2072 | gfc_error ("Missing right parenthesis at %C"); | |
2073 | m = MATCH_ERROR; | |
2074 | goto no_match; | |
2075 | } | |
2076 | ||
2077 | gfc_free_expr (e); | |
e2d29968 PT |
2078 | gfc_undo_symbols (); |
2079 | return MATCH_YES; | |
2080 | } | |
2081 | else | |
2082 | { | |
2083 | /* ....or else, the match is real. */ | |
2084 | if (n == MATCH_NO) | |
2085 | gfc_error ("Expected initialization expression at %C"); | |
2086 | if (n != MATCH_YES) | |
2087 | return MATCH_ERROR; | |
2088 | } | |
2089 | } | |
6de9cd9a DN |
2090 | |
2091 | if (e->rank != 0) | |
2092 | { | |
2093 | gfc_error ("Expected scalar initialization expression at %C"); | |
2094 | m = MATCH_ERROR; | |
2095 | goto no_match; | |
2096 | } | |
2097 | ||
2098 | msg = gfc_extract_int (e, &ts->kind); | |
1c8bcdf7 | 2099 | |
6de9cd9a DN |
2100 | if (msg != NULL) |
2101 | { | |
2102 | gfc_error (msg); | |
2103 | m = MATCH_ERROR; | |
2104 | goto no_match; | |
2105 | } | |
2106 | ||
a8b3b0b6 CR |
2107 | /* Before throwing away the expression, let's see if we had a |
2108 | C interoperable kind (and store the fact). */ | |
2109 | if (e->ts.is_c_interop == 1) | |
2110 | { | |
2111 | /* Mark this as c interoperable if being declared with one | |
2112 | of the named constants from iso_c_binding. */ | |
2113 | ts->is_c_interop = e->ts.is_iso_c; | |
2114 | ts->f90_type = e->ts.f90_type; | |
2115 | } | |
2116 | ||
6de9cd9a DN |
2117 | gfc_free_expr (e); |
2118 | e = NULL; | |
2119 | ||
a8b3b0b6 CR |
2120 | /* Ignore errors to this point, if we've gotten here. This means |
2121 | we ignore the m=MATCH_ERROR from above. */ | |
e7a2d5fb | 2122 | if (gfc_validate_kind (ts->type, ts->kind, true) < 0) |
6de9cd9a DN |
2123 | { |
2124 | gfc_error ("Kind %d not supported for type %s at %C", ts->kind, | |
2125 | gfc_basic_typename (ts->type)); | |
96ee3a4a TB |
2126 | gfc_current_locus = where; |
2127 | return MATCH_ERROR; | |
6de9cd9a | 2128 | } |
96ee3a4a | 2129 | |
2ec855f1 TB |
2130 | /* Warn if, e.g., c_int is used for a REAL variable, but not |
2131 | if, e.g., c_double is used for COMPLEX as the standard | |
2132 | explicitly says that the kind type parameter for complex and real | |
2133 | variable is the same, i.e. c_float == c_float_complex. */ | |
2134 | if (ts->f90_type != BT_UNKNOWN && ts->f90_type != ts->type | |
2135 | && !((ts->f90_type == BT_REAL && ts->type == BT_COMPLEX) | |
2136 | || (ts->f90_type == BT_COMPLEX && ts->type == BT_REAL))) | |
2be51762 TB |
2137 | gfc_warning_now ("C kind type parameter is for type %s but type at %L " |
2138 | "is %s", gfc_basic_typename (ts->f90_type), &where, | |
2139 | gfc_basic_typename (ts->type)); | |
2ec855f1 | 2140 | |
96ee3a4a | 2141 | gfc_gobble_whitespace (); |
8fc541d3 FXC |
2142 | if ((c = gfc_next_ascii_char ()) != ')' |
2143 | && (ts->type != BT_CHARACTER || c != ',')) | |
6de9cd9a | 2144 | { |
96ee3a4a TB |
2145 | if (ts->type == BT_CHARACTER) |
2146 | gfc_error ("Missing right parenthesis or comma at %C"); | |
2147 | else | |
2148 | gfc_error ("Missing right parenthesis at %C"); | |
e2d29968 | 2149 | m = MATCH_ERROR; |
6de9cd9a | 2150 | } |
a8b3b0b6 CR |
2151 | else |
2152 | /* All tests passed. */ | |
2153 | m = MATCH_YES; | |
6de9cd9a | 2154 | |
a8b3b0b6 CR |
2155 | if(m == MATCH_ERROR) |
2156 | gfc_current_locus = where; | |
2157 | ||
2158 | /* Return what we know from the test(s). */ | |
2159 | return m; | |
6de9cd9a DN |
2160 | |
2161 | no_match: | |
2162 | gfc_free_expr (e); | |
63645982 | 2163 | gfc_current_locus = where; |
6de9cd9a DN |
2164 | return m; |
2165 | } | |
2166 | ||
2167 | ||
187de1ed FXC |
2168 | static match |
2169 | match_char_kind (int * kind, int * is_iso_c) | |
2170 | { | |
2171 | locus where; | |
2172 | gfc_expr *e; | |
2173 | match m, n; | |
2174 | const char *msg; | |
2175 | ||
2176 | m = MATCH_NO; | |
2177 | e = NULL; | |
2178 | where = gfc_current_locus; | |
2179 | ||
2180 | n = gfc_match_init_expr (&e); | |
96ee3a4a | 2181 | |
1c8bcdf7 | 2182 | if (n != MATCH_YES && gfc_matching_function) |
96ee3a4a | 2183 | { |
1c8bcdf7 PT |
2184 | /* The expression might include use-associated or imported |
2185 | parameters and try again after the specification | |
2186 | expressions. */ | |
96ee3a4a | 2187 | gfc_free_expr (e); |
96ee3a4a TB |
2188 | gfc_undo_symbols (); |
2189 | return MATCH_YES; | |
2190 | } | |
2191 | ||
187de1ed FXC |
2192 | if (n == MATCH_NO) |
2193 | gfc_error ("Expected initialization expression at %C"); | |
2194 | if (n != MATCH_YES) | |
2195 | return MATCH_ERROR; | |
2196 | ||
2197 | if (e->rank != 0) | |
2198 | { | |
2199 | gfc_error ("Expected scalar initialization expression at %C"); | |
2200 | m = MATCH_ERROR; | |
2201 | goto no_match; | |
2202 | } | |
2203 | ||
2204 | msg = gfc_extract_int (e, kind); | |
2205 | *is_iso_c = e->ts.is_iso_c; | |
2206 | if (msg != NULL) | |
2207 | { | |
2208 | gfc_error (msg); | |
2209 | m = MATCH_ERROR; | |
2210 | goto no_match; | |
2211 | } | |
2212 | ||
2213 | gfc_free_expr (e); | |
2214 | ||
2215 | /* Ignore errors to this point, if we've gotten here. This means | |
2216 | we ignore the m=MATCH_ERROR from above. */ | |
2217 | if (gfc_validate_kind (BT_CHARACTER, *kind, true) < 0) | |
2218 | { | |
2219 | gfc_error ("Kind %d is not supported for CHARACTER at %C", *kind); | |
2220 | m = MATCH_ERROR; | |
2221 | } | |
2222 | else | |
2223 | /* All tests passed. */ | |
2224 | m = MATCH_YES; | |
2225 | ||
2226 | if (m == MATCH_ERROR) | |
2227 | gfc_current_locus = where; | |
2228 | ||
2229 | /* Return what we know from the test(s). */ | |
2230 | return m; | |
2231 | ||
2232 | no_match: | |
2233 | gfc_free_expr (e); | |
2234 | gfc_current_locus = where; | |
2235 | return m; | |
2236 | } | |
2237 | ||
8234e5e0 | 2238 | |
6de9cd9a DN |
2239 | /* Match the various kind/length specifications in a CHARACTER |
2240 | declaration. We don't return MATCH_NO. */ | |
2241 | ||
8234e5e0 SK |
2242 | match |
2243 | gfc_match_char_spec (gfc_typespec *ts) | |
6de9cd9a | 2244 | { |
187de1ed | 2245 | int kind, seen_length, is_iso_c; |
6de9cd9a DN |
2246 | gfc_charlen *cl; |
2247 | gfc_expr *len; | |
2248 | match m; | |
187de1ed | 2249 | |
6de9cd9a DN |
2250 | len = NULL; |
2251 | seen_length = 0; | |
187de1ed FXC |
2252 | kind = 0; |
2253 | is_iso_c = 0; | |
6de9cd9a DN |
2254 | |
2255 | /* Try the old-style specification first. */ | |
2256 | old_char_selector = 0; | |
2257 | ||
2258 | m = match_char_length (&len); | |
2259 | if (m != MATCH_NO) | |
2260 | { | |
2261 | if (m == MATCH_YES) | |
2262 | old_char_selector = 1; | |
2263 | seen_length = 1; | |
2264 | goto done; | |
2265 | } | |
2266 | ||
2267 | m = gfc_match_char ('('); | |
2268 | if (m != MATCH_YES) | |
2269 | { | |
a8b3b0b6 | 2270 | m = MATCH_YES; /* Character without length is a single char. */ |
6de9cd9a DN |
2271 | goto done; |
2272 | } | |
2273 | ||
a8b3b0b6 | 2274 | /* Try the weird case: ( KIND = <int> [ , LEN = <len-param> ] ). */ |
6de9cd9a DN |
2275 | if (gfc_match (" kind =") == MATCH_YES) |
2276 | { | |
187de1ed | 2277 | m = match_char_kind (&kind, &is_iso_c); |
a8b3b0b6 | 2278 | |
6de9cd9a DN |
2279 | if (m == MATCH_ERROR) |
2280 | goto done; | |
2281 | if (m == MATCH_NO) | |
2282 | goto syntax; | |
2283 | ||
2284 | if (gfc_match (" , len =") == MATCH_NO) | |
2285 | goto rparen; | |
2286 | ||
2287 | m = char_len_param_value (&len); | |
2288 | if (m == MATCH_NO) | |
2289 | goto syntax; | |
2290 | if (m == MATCH_ERROR) | |
2291 | goto done; | |
2292 | seen_length = 1; | |
2293 | ||
2294 | goto rparen; | |
2295 | } | |
2296 | ||
66e4ab31 | 2297 | /* Try to match "LEN = <len-param>" or "LEN = <len-param>, KIND = <int>". */ |
6de9cd9a DN |
2298 | if (gfc_match (" len =") == MATCH_YES) |
2299 | { | |
2300 | m = char_len_param_value (&len); | |
2301 | if (m == MATCH_NO) | |
2302 | goto syntax; | |
2303 | if (m == MATCH_ERROR) | |
2304 | goto done; | |
2305 | seen_length = 1; | |
2306 | ||
2307 | if (gfc_match_char (')') == MATCH_YES) | |
2308 | goto done; | |
2309 | ||
2310 | if (gfc_match (" , kind =") != MATCH_YES) | |
2311 | goto syntax; | |
2312 | ||
187de1ed FXC |
2313 | if (match_char_kind (&kind, &is_iso_c) == MATCH_ERROR) |
2314 | goto done; | |
6de9cd9a DN |
2315 | |
2316 | goto rparen; | |
2317 | } | |
2318 | ||
66e4ab31 | 2319 | /* Try to match ( <len-param> ) or ( <len-param> , [ KIND = ] <int> ). */ |
6de9cd9a DN |
2320 | m = char_len_param_value (&len); |
2321 | if (m == MATCH_NO) | |
2322 | goto syntax; | |
2323 | if (m == MATCH_ERROR) | |
2324 | goto done; | |
2325 | seen_length = 1; | |
2326 | ||
2327 | m = gfc_match_char (')'); | |
2328 | if (m == MATCH_YES) | |
2329 | goto done; | |
2330 | ||
2331 | if (gfc_match_char (',') != MATCH_YES) | |
2332 | goto syntax; | |
2333 | ||
a8b3b0b6 | 2334 | gfc_match (" kind ="); /* Gobble optional text. */ |
6de9cd9a | 2335 | |
187de1ed | 2336 | m = match_char_kind (&kind, &is_iso_c); |
6de9cd9a DN |
2337 | if (m == MATCH_ERROR) |
2338 | goto done; | |
2339 | if (m == MATCH_NO) | |
2340 | goto syntax; | |
2341 | ||
2342 | rparen: | |
2343 | /* Require a right-paren at this point. */ | |
2344 | m = gfc_match_char (')'); | |
2345 | if (m == MATCH_YES) | |
2346 | goto done; | |
2347 | ||
2348 | syntax: | |
2349 | gfc_error ("Syntax error in CHARACTER declaration at %C"); | |
2350 | m = MATCH_ERROR; | |
16f8ffc8 JD |
2351 | gfc_free_expr (len); |
2352 | return m; | |
6de9cd9a DN |
2353 | |
2354 | done: | |
a99d95a2 PT |
2355 | /* Deal with character functions after USE and IMPORT statements. */ |
2356 | if (gfc_matching_function) | |
1c8bcdf7 | 2357 | { |
a99d95a2 | 2358 | gfc_free_expr (len); |
1c8bcdf7 PT |
2359 | gfc_undo_symbols (); |
2360 | return MATCH_YES; | |
2361 | } | |
2362 | ||
6de9cd9a DN |
2363 | if (m != MATCH_YES) |
2364 | { | |
2365 | gfc_free_expr (len); | |
2366 | return m; | |
2367 | } | |
2368 | ||
2369 | /* Do some final massaging of the length values. */ | |
b76e28c6 | 2370 | cl = gfc_new_charlen (gfc_current_ns, NULL); |
6de9cd9a DN |
2371 | |
2372 | if (seen_length == 0) | |
b7e75771 | 2373 | cl->length = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1); |
6de9cd9a | 2374 | else |
5cd09fac | 2375 | cl->length = len; |
6de9cd9a | 2376 | |
bc21d315 | 2377 | ts->u.cl = cl; |
187de1ed | 2378 | ts->kind = kind == 0 ? gfc_default_character_kind : kind; |
6de9cd9a | 2379 | |
a8b3b0b6 CR |
2380 | /* We have to know if it was a c interoperable kind so we can |
2381 | do accurate type checking of bind(c) procs, etc. */ | |
187de1ed FXC |
2382 | if (kind != 0) |
2383 | /* Mark this as c interoperable if being declared with one | |
2384 | of the named constants from iso_c_binding. */ | |
2385 | ts->is_c_interop = is_iso_c; | |
a8b3b0b6 | 2386 | else if (len != NULL) |
187de1ed FXC |
2387 | /* Here, we might have parsed something such as: character(c_char) |
2388 | In this case, the parsing code above grabs the c_char when | |
2389 | looking for the length (line 1690, roughly). it's the last | |
2390 | testcase for parsing the kind params of a character variable. | |
2391 | However, it's not actually the length. this seems like it | |
2392 | could be an error. | |
2393 | To see if the user used a C interop kind, test the expr | |
2394 | of the so called length, and see if it's C interoperable. */ | |
2395 | ts->is_c_interop = len->ts.is_iso_c; | |
a8b3b0b6 | 2396 | |
6de9cd9a DN |
2397 | return MATCH_YES; |
2398 | } | |
2399 | ||
2400 | ||
e74f1cc8 JW |
2401 | /* Matches a declaration-type-spec (F03:R502). If successful, sets the ts |
2402 | structure to the matched specification. This is necessary for FUNCTION and | |
6de9cd9a DN |
2403 | IMPLICIT statements. |
2404 | ||
d51347f9 | 2405 | If implicit_flag is nonzero, then we don't check for the optional |
e5ddaa24 | 2406 | kind specification. Not doing so is needed for matching an IMPLICIT |
6de9cd9a DN |
2407 | statement correctly. */ |
2408 | ||
e2d29968 | 2409 | match |
e74f1cc8 | 2410 | gfc_match_decl_type_spec (gfc_typespec *ts, int implicit_flag) |
6de9cd9a DN |
2411 | { |
2412 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2413 | gfc_symbol *sym; | |
2414 | match m; | |
8fc541d3 | 2415 | char c; |
0fb56814 | 2416 | bool seen_deferred_kind, matched_type; |
6de9cd9a | 2417 | |
1c8bcdf7 PT |
2418 | /* A belt and braces check that the typespec is correctly being treated |
2419 | as a deferred characteristic association. */ | |
2420 | seen_deferred_kind = (gfc_current_state () == COMP_FUNCTION) | |
a99d95a2 PT |
2421 | && (gfc_current_block ()->result->ts.kind == -1) |
2422 | && (ts->kind == -1); | |
6de9cd9a | 2423 | gfc_clear_ts (ts); |
1c8bcdf7 PT |
2424 | if (seen_deferred_kind) |
2425 | ts->kind = -1; | |
6de9cd9a | 2426 | |
a8b3b0b6 CR |
2427 | /* Clear the current binding label, in case one is given. */ |
2428 | curr_binding_label[0] = '\0'; | |
2429 | ||
5f700e6d AL |
2430 | if (gfc_match (" byte") == MATCH_YES) |
2431 | { | |
0b3624f6 | 2432 | if (gfc_notify_std (GFC_STD_GNU, "Extension: BYTE type at %C") |
5f700e6d AL |
2433 | == FAILURE) |
2434 | return MATCH_ERROR; | |
2435 | ||
2436 | if (gfc_validate_kind (BT_INTEGER, 1, true) < 0) | |
2437 | { | |
2438 | gfc_error ("BYTE type used at %C " | |
2439 | "is not available on the target machine"); | |
2440 | return MATCH_ERROR; | |
2441 | } | |
d51347f9 | 2442 | |
5f700e6d AL |
2443 | ts->type = BT_INTEGER; |
2444 | ts->kind = 1; | |
2445 | return MATCH_YES; | |
2446 | } | |
2447 | ||
0fb56814 TB |
2448 | |
2449 | m = gfc_match (" type ( %n", name); | |
2450 | matched_type = (m == MATCH_YES); | |
2451 | ||
2452 | if ((matched_type && strcmp ("integer", name) == 0) | |
2453 | || (!matched_type && gfc_match (" integer") == MATCH_YES)) | |
6de9cd9a DN |
2454 | { |
2455 | ts->type = BT_INTEGER; | |
9d64df18 | 2456 | ts->kind = gfc_default_integer_kind; |
6de9cd9a DN |
2457 | goto get_kind; |
2458 | } | |
2459 | ||
0fb56814 TB |
2460 | if ((matched_type && strcmp ("character", name) == 0) |
2461 | || (!matched_type && gfc_match (" character") == MATCH_YES)) | |
6de9cd9a | 2462 | { |
0fb56814 TB |
2463 | if (matched_type |
2464 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: TYPE with " | |
2465 | "intrinsic-type-spec at %C") == FAILURE) | |
2466 | return MATCH_ERROR; | |
2467 | ||
6de9cd9a | 2468 | ts->type = BT_CHARACTER; |
e5ddaa24 | 2469 | if (implicit_flag == 0) |
0fb56814 | 2470 | m = gfc_match_char_spec (ts); |
e5ddaa24 | 2471 | else |
0fb56814 TB |
2472 | m = MATCH_YES; |
2473 | ||
2474 | if (matched_type && m == MATCH_YES && gfc_match_char (')') != MATCH_YES) | |
2475 | m = MATCH_ERROR; | |
2476 | ||
2477 | return m; | |
6de9cd9a DN |
2478 | } |
2479 | ||
0fb56814 TB |
2480 | if ((matched_type && strcmp ("real", name) == 0) |
2481 | || (!matched_type && gfc_match (" real") == MATCH_YES)) | |
6de9cd9a DN |
2482 | { |
2483 | ts->type = BT_REAL; | |
9d64df18 | 2484 | ts->kind = gfc_default_real_kind; |
6de9cd9a DN |
2485 | goto get_kind; |
2486 | } | |
2487 | ||
0fb56814 TB |
2488 | if ((matched_type |
2489 | && (strcmp ("doubleprecision", name) == 0 | |
2490 | || (strcmp ("double", name) == 0 | |
2491 | && gfc_match (" precision") == MATCH_YES))) | |
2492 | || (!matched_type && gfc_match (" double precision") == MATCH_YES)) | |
6de9cd9a | 2493 | { |
0fb56814 TB |
2494 | if (matched_type |
2495 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: TYPE with " | |
2496 | "intrinsic-type-spec at %C") == FAILURE) | |
2497 | return MATCH_ERROR; | |
2498 | if (matched_type && gfc_match_char (')') != MATCH_YES) | |
2499 | return MATCH_ERROR; | |
2500 | ||
6de9cd9a | 2501 | ts->type = BT_REAL; |
9d64df18 | 2502 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
2503 | return MATCH_YES; |
2504 | } | |
2505 | ||
0fb56814 TB |
2506 | if ((matched_type && strcmp ("complex", name) == 0) |
2507 | || (!matched_type && gfc_match (" complex") == MATCH_YES)) | |
6de9cd9a DN |
2508 | { |
2509 | ts->type = BT_COMPLEX; | |
9d64df18 | 2510 | ts->kind = gfc_default_complex_kind; |
6de9cd9a DN |
2511 | goto get_kind; |
2512 | } | |
2513 | ||
0fb56814 TB |
2514 | if ((matched_type |
2515 | && (strcmp ("doublecomplex", name) == 0 | |
2516 | || (strcmp ("double", name) == 0 | |
2517 | && gfc_match (" complex") == MATCH_YES))) | |
2518 | || (!matched_type && gfc_match (" double complex") == MATCH_YES)) | |
6de9cd9a | 2519 | { |
0fb56814 TB |
2520 | if (gfc_notify_std (GFC_STD_GNU, "Extension: DOUBLE COMPLEX at %C") |
2521 | == FAILURE) | |
2522 | return MATCH_ERROR; | |
2523 | ||
2524 | if (matched_type | |
2525 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: TYPE with " | |
2526 | "intrinsic-type-spec at %C") == FAILURE) | |
2527 | return MATCH_ERROR; | |
2528 | ||
2529 | if (matched_type && gfc_match_char (')') != MATCH_YES) | |
df8652dc SK |
2530 | return MATCH_ERROR; |
2531 | ||
6de9cd9a | 2532 | ts->type = BT_COMPLEX; |
9d64df18 | 2533 | ts->kind = gfc_default_double_kind; |
6de9cd9a DN |
2534 | return MATCH_YES; |
2535 | } | |
2536 | ||
0fb56814 TB |
2537 | if ((matched_type && strcmp ("logical", name) == 0) |
2538 | || (!matched_type && gfc_match (" logical") == MATCH_YES)) | |
6de9cd9a DN |
2539 | { |
2540 | ts->type = BT_LOGICAL; | |
9d64df18 | 2541 | ts->kind = gfc_default_logical_kind; |
6de9cd9a DN |
2542 | goto get_kind; |
2543 | } | |
2544 | ||
0fb56814 TB |
2545 | if (matched_type) |
2546 | m = gfc_match_char (')'); | |
2547 | ||
cf2b3c22 TB |
2548 | if (m == MATCH_YES) |
2549 | ts->type = BT_DERIVED; | |
2550 | else | |
727e8544 JW |
2551 | { |
2552 | m = gfc_match (" class ( %n )", name); | |
2553 | if (m != MATCH_YES) | |
2554 | return m; | |
cf2b3c22 | 2555 | ts->type = BT_CLASS; |
727e8544 | 2556 | |
e74f1cc8 JW |
2557 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: CLASS statement at %C") |
2558 | == FAILURE) | |
2559 | return MATCH_ERROR; | |
727e8544 | 2560 | } |
6de9cd9a | 2561 | |
1c8bcdf7 PT |
2562 | /* Defer association of the derived type until the end of the |
2563 | specification block. However, if the derived type can be | |
2564 | found, add it to the typespec. */ | |
2565 | if (gfc_matching_function) | |
e2d29968 | 2566 | { |
bc21d315 | 2567 | ts->u.derived = NULL; |
1c8bcdf7 PT |
2568 | if (gfc_current_state () != COMP_INTERFACE |
2569 | && !gfc_find_symbol (name, NULL, 1, &sym) && sym) | |
bc21d315 | 2570 | ts->u.derived = sym; |
e2d29968 PT |
2571 | return MATCH_YES; |
2572 | } | |
2573 | ||
2574 | /* Search for the name but allow the components to be defined later. If | |
2575 | type = -1, this typespec has been seen in a function declaration but | |
1c8bcdf7 PT |
2576 | the type could not be accessed at that point. */ |
2577 | sym = NULL; | |
e2d29968 | 2578 | if (ts->kind != -1 && gfc_get_ha_symbol (name, &sym)) |
6de9cd9a DN |
2579 | { |
2580 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2581 | return MATCH_ERROR; | |
2582 | } | |
e2d29968 PT |
2583 | else if (ts->kind == -1) |
2584 | { | |
1c8bcdf7 PT |
2585 | int iface = gfc_state_stack->previous->state != COMP_INTERFACE |
2586 | || gfc_current_ns->has_import_set; | |
2587 | if (gfc_find_symbol (name, NULL, iface, &sym)) | |
e2d29968 PT |
2588 | { |
2589 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2590 | return MATCH_ERROR; | |
2591 | } | |
2592 | ||
1c8bcdf7 | 2593 | ts->kind = 0; |
e2d29968 PT |
2594 | if (sym == NULL) |
2595 | return MATCH_NO; | |
2596 | } | |
6de9cd9a DN |
2597 | |
2598 | if (sym->attr.flavor != FL_DERIVED | |
231b2fcc | 2599 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
2600 | return MATCH_ERROR; |
2601 | ||
1c8bcdf7 | 2602 | gfc_set_sym_referenced (sym); |
bc21d315 | 2603 | ts->u.derived = sym; |
6de9cd9a DN |
2604 | |
2605 | return MATCH_YES; | |
2606 | ||
2607 | get_kind: | |
0fb56814 TB |
2608 | if (matched_type |
2609 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: TYPE with " | |
2610 | "intrinsic-type-spec at %C") == FAILURE) | |
2611 | return MATCH_ERROR; | |
2612 | ||
6de9cd9a DN |
2613 | /* For all types except double, derived and character, look for an |
2614 | optional kind specifier. MATCH_NO is actually OK at this point. */ | |
e5ddaa24 | 2615 | if (implicit_flag == 1) |
0fb56814 TB |
2616 | { |
2617 | if (matched_type && gfc_match_char (')') != MATCH_YES) | |
2618 | return MATCH_ERROR; | |
2619 | ||
2620 | return MATCH_YES; | |
2621 | } | |
6de9cd9a | 2622 | |
0ff0dfbf TS |
2623 | if (gfc_current_form == FORM_FREE) |
2624 | { | |
0b3624f6 SK |
2625 | c = gfc_peek_ascii_char (); |
2626 | if (!gfc_is_whitespace (c) && c != '*' && c != '(' | |
636dff67 | 2627 | && c != ':' && c != ',') |
0fb56814 TB |
2628 | { |
2629 | if (matched_type && c == ')') | |
2630 | { | |
2631 | gfc_next_ascii_char (); | |
2632 | return MATCH_YES; | |
2633 | } | |
2634 | return MATCH_NO; | |
2635 | } | |
0ff0dfbf TS |
2636 | } |
2637 | ||
e2d29968 | 2638 | m = gfc_match_kind_spec (ts, false); |
6de9cd9a DN |
2639 | if (m == MATCH_NO && ts->type != BT_CHARACTER) |
2640 | m = gfc_match_old_kind_spec (ts); | |
2641 | ||
0fb56814 TB |
2642 | if (matched_type && gfc_match_char (')') != MATCH_YES) |
2643 | return MATCH_ERROR; | |
2644 | ||
1c8bcdf7 PT |
2645 | /* Defer association of the KIND expression of function results |
2646 | until after USE and IMPORT statements. */ | |
2647 | if ((gfc_current_state () == COMP_NONE && gfc_error_flag_test ()) | |
2648 | || gfc_matching_function) | |
2649 | return MATCH_YES; | |
2650 | ||
6de9cd9a DN |
2651 | if (m == MATCH_NO) |
2652 | m = MATCH_YES; /* No kind specifier found. */ | |
2653 | ||
2654 | return m; | |
2655 | } | |
2656 | ||
2657 | ||
e5ddaa24 TS |
2658 | /* Match an IMPLICIT NONE statement. Actually, this statement is |
2659 | already matched in parse.c, or we would not end up here in the | |
2660 | first place. So the only thing we need to check, is if there is | |
2661 | trailing garbage. If not, the match is successful. */ | |
2662 | ||
2663 | match | |
2664 | gfc_match_implicit_none (void) | |
2665 | { | |
e5ddaa24 TS |
2666 | return (gfc_match_eos () == MATCH_YES) ? MATCH_YES : MATCH_NO; |
2667 | } | |
2668 | ||
2669 | ||
2670 | /* Match the letter range(s) of an IMPLICIT statement. */ | |
2671 | ||
2672 | static match | |
1107b970 | 2673 | match_implicit_range (void) |
e5ddaa24 | 2674 | { |
8fc541d3 FXC |
2675 | char c, c1, c2; |
2676 | int inner; | |
e5ddaa24 TS |
2677 | locus cur_loc; |
2678 | ||
2679 | cur_loc = gfc_current_locus; | |
2680 | ||
2681 | gfc_gobble_whitespace (); | |
8fc541d3 | 2682 | c = gfc_next_ascii_char (); |
e5ddaa24 TS |
2683 | if (c != '(') |
2684 | { | |
2685 | gfc_error ("Missing character range in IMPLICIT at %C"); | |
2686 | goto bad; | |
2687 | } | |
2688 | ||
2689 | inner = 1; | |
2690 | while (inner) | |
2691 | { | |
2692 | gfc_gobble_whitespace (); | |
8fc541d3 | 2693 | c1 = gfc_next_ascii_char (); |
e5ddaa24 TS |
2694 | if (!ISALPHA (c1)) |
2695 | goto bad; | |
2696 | ||
2697 | gfc_gobble_whitespace (); | |
8fc541d3 | 2698 | c = gfc_next_ascii_char (); |
e5ddaa24 TS |
2699 | |
2700 | switch (c) | |
2701 | { | |
2702 | case ')': | |
66e4ab31 | 2703 | inner = 0; /* Fall through. */ |
e5ddaa24 TS |
2704 | |
2705 | case ',': | |
2706 | c2 = c1; | |
2707 | break; | |
2708 | ||
2709 | case '-': | |
2710 | gfc_gobble_whitespace (); | |
8fc541d3 | 2711 | c2 = gfc_next_ascii_char (); |
e5ddaa24 TS |
2712 | if (!ISALPHA (c2)) |
2713 | goto bad; | |
2714 | ||
2715 | gfc_gobble_whitespace (); | |
8fc541d3 | 2716 | c = gfc_next_ascii_char (); |
e5ddaa24 TS |
2717 | |
2718 | if ((c != ',') && (c != ')')) | |
2719 | goto bad; | |
2720 | if (c == ')') | |
2721 | inner = 0; | |
2722 | ||
2723 | break; | |
2724 | ||
2725 | default: | |
2726 | goto bad; | |
2727 | } | |
2728 | ||
2729 | if (c1 > c2) | |
2730 | { | |
2731 | gfc_error ("Letters must be in alphabetic order in " | |
2732 | "IMPLICIT statement at %C"); | |
2733 | goto bad; | |
2734 | } | |
2735 | ||
2736 | /* See if we can add the newly matched range to the pending | |
636dff67 SK |
2737 | implicits from this IMPLICIT statement. We do not check for |
2738 | conflicts with whatever earlier IMPLICIT statements may have | |
2739 | set. This is done when we've successfully finished matching | |
2740 | the current one. */ | |
1107b970 | 2741 | if (gfc_add_new_implicit_range (c1, c2) != SUCCESS) |
e5ddaa24 TS |
2742 | goto bad; |
2743 | } | |
2744 | ||
2745 | return MATCH_YES; | |
2746 | ||
2747 | bad: | |
2748 | gfc_syntax_error (ST_IMPLICIT); | |
2749 | ||
2750 | gfc_current_locus = cur_loc; | |
2751 | return MATCH_ERROR; | |
2752 | } | |
2753 | ||
2754 | ||
2755 | /* Match an IMPLICIT statement, storing the types for | |
2756 | gfc_set_implicit() if the statement is accepted by the parser. | |
2757 | There is a strange looking, but legal syntactic construction | |
2758 | possible. It looks like: | |
2759 | ||
2760 | IMPLICIT INTEGER (a-b) (c-d) | |
2761 | ||
2762 | This is legal if "a-b" is a constant expression that happens to | |
2763 | equal one of the legal kinds for integers. The real problem | |
2764 | happens with an implicit specification that looks like: | |
2765 | ||
2766 | IMPLICIT INTEGER (a-b) | |
2767 | ||
2768 | In this case, a typespec matcher that is "greedy" (as most of the | |
2769 | matchers are) gobbles the character range as a kindspec, leaving | |
2770 | nothing left. We therefore have to go a bit more slowly in the | |
2771 | matching process by inhibiting the kindspec checking during | |
2772 | typespec matching and checking for a kind later. */ | |
2773 | ||
2774 | match | |
2775 | gfc_match_implicit (void) | |
2776 | { | |
2777 | gfc_typespec ts; | |
2778 | locus cur_loc; | |
8fc541d3 | 2779 | char c; |
e5ddaa24 TS |
2780 | match m; |
2781 | ||
44000dbb JD |
2782 | gfc_clear_ts (&ts); |
2783 | ||
e5ddaa24 TS |
2784 | /* We don't allow empty implicit statements. */ |
2785 | if (gfc_match_eos () == MATCH_YES) | |
2786 | { | |
2787 | gfc_error ("Empty IMPLICIT statement at %C"); | |
2788 | return MATCH_ERROR; | |
2789 | } | |
2790 | ||
e5ddaa24 TS |
2791 | do |
2792 | { | |
1107b970 PB |
2793 | /* First cleanup. */ |
2794 | gfc_clear_new_implicit (); | |
2795 | ||
e5ddaa24 | 2796 | /* A basic type is mandatory here. */ |
e74f1cc8 | 2797 | m = gfc_match_decl_type_spec (&ts, 1); |
e5ddaa24 TS |
2798 | if (m == MATCH_ERROR) |
2799 | goto error; | |
2800 | if (m == MATCH_NO) | |
2801 | goto syntax; | |
2802 | ||
2803 | cur_loc = gfc_current_locus; | |
1107b970 | 2804 | m = match_implicit_range (); |
e5ddaa24 TS |
2805 | |
2806 | if (m == MATCH_YES) | |
2807 | { | |
1107b970 | 2808 | /* We may have <TYPE> (<RANGE>). */ |
e5ddaa24 | 2809 | gfc_gobble_whitespace (); |
8fc541d3 | 2810 | c = gfc_next_ascii_char (); |
e5ddaa24 | 2811 | if ((c == '\n') || (c == ',')) |
1107b970 PB |
2812 | { |
2813 | /* Check for CHARACTER with no length parameter. */ | |
bc21d315 | 2814 | if (ts.type == BT_CHARACTER && !ts.u.cl) |
1107b970 | 2815 | { |
9d64df18 | 2816 | ts.kind = gfc_default_character_kind; |
b76e28c6 | 2817 | ts.u.cl = gfc_new_charlen (gfc_current_ns, NULL); |
b7e75771 JD |
2818 | ts.u.cl->length = gfc_get_int_expr (gfc_default_integer_kind, |
2819 | NULL, 1); | |
1107b970 PB |
2820 | } |
2821 | ||
2822 | /* Record the Successful match. */ | |
2823 | if (gfc_merge_new_implicit (&ts) != SUCCESS) | |
2824 | return MATCH_ERROR; | |
2825 | continue; | |
2826 | } | |
e5ddaa24 TS |
2827 | |
2828 | gfc_current_locus = cur_loc; | |
2829 | } | |
2830 | ||
1107b970 PB |
2831 | /* Discard the (incorrectly) matched range. */ |
2832 | gfc_clear_new_implicit (); | |
2833 | ||
2834 | /* Last chance -- check <TYPE> <SELECTOR> (<RANGE>). */ | |
2835 | if (ts.type == BT_CHARACTER) | |
8234e5e0 | 2836 | m = gfc_match_char_spec (&ts); |
1107b970 | 2837 | else |
e5ddaa24 | 2838 | { |
e2d29968 | 2839 | m = gfc_match_kind_spec (&ts, false); |
e5ddaa24 | 2840 | if (m == MATCH_NO) |
1107b970 PB |
2841 | { |
2842 | m = gfc_match_old_kind_spec (&ts); | |
2843 | if (m == MATCH_ERROR) | |
2844 | goto error; | |
2845 | if (m == MATCH_NO) | |
2846 | goto syntax; | |
2847 | } | |
e5ddaa24 | 2848 | } |
1107b970 PB |
2849 | if (m == MATCH_ERROR) |
2850 | goto error; | |
e5ddaa24 | 2851 | |
1107b970 | 2852 | m = match_implicit_range (); |
e5ddaa24 TS |
2853 | if (m == MATCH_ERROR) |
2854 | goto error; | |
2855 | if (m == MATCH_NO) | |
2856 | goto syntax; | |
2857 | ||
2858 | gfc_gobble_whitespace (); | |
8fc541d3 | 2859 | c = gfc_next_ascii_char (); |
e5ddaa24 TS |
2860 | if ((c != '\n') && (c != ',')) |
2861 | goto syntax; | |
2862 | ||
1107b970 PB |
2863 | if (gfc_merge_new_implicit (&ts) != SUCCESS) |
2864 | return MATCH_ERROR; | |
e5ddaa24 TS |
2865 | } |
2866 | while (c == ','); | |
2867 | ||
1107b970 | 2868 | return MATCH_YES; |
e5ddaa24 TS |
2869 | |
2870 | syntax: | |
2871 | gfc_syntax_error (ST_IMPLICIT); | |
2872 | ||
2873 | error: | |
2874 | return MATCH_ERROR; | |
2875 | } | |
2876 | ||
66e4ab31 | 2877 | |
8998be20 TB |
2878 | match |
2879 | gfc_match_import (void) | |
2880 | { | |
2881 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2882 | match m; | |
2883 | gfc_symbol *sym; | |
2884 | gfc_symtree *st; | |
2885 | ||
66e4ab31 SK |
2886 | if (gfc_current_ns->proc_name == NULL |
2887 | || gfc_current_ns->proc_name->attr.if_source != IFSRC_IFBODY) | |
8998be20 TB |
2888 | { |
2889 | gfc_error ("IMPORT statement at %C only permitted in " | |
2890 | "an INTERFACE body"); | |
2891 | return MATCH_ERROR; | |
2892 | } | |
2893 | ||
636dff67 | 2894 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: IMPORT statement at %C") |
8998be20 TB |
2895 | == FAILURE) |
2896 | return MATCH_ERROR; | |
2897 | ||
2898 | if (gfc_match_eos () == MATCH_YES) | |
2899 | { | |
2900 | /* All host variables should be imported. */ | |
2901 | gfc_current_ns->has_import_set = 1; | |
2902 | return MATCH_YES; | |
2903 | } | |
2904 | ||
2905 | if (gfc_match (" ::") == MATCH_YES) | |
2906 | { | |
2907 | if (gfc_match_eos () == MATCH_YES) | |
636dff67 SK |
2908 | { |
2909 | gfc_error ("Expecting list of named entities at %C"); | |
2910 | return MATCH_ERROR; | |
2911 | } | |
8998be20 TB |
2912 | } |
2913 | ||
2914 | for(;;) | |
2915 | { | |
2916 | m = gfc_match (" %n", name); | |
2917 | switch (m) | |
2918 | { | |
2919 | case MATCH_YES: | |
36d3fb4c | 2920 | if (gfc_current_ns->parent != NULL |
66e4ab31 | 2921 | && gfc_find_symbol (name, gfc_current_ns->parent, 1, &sym)) |
36d3fb4c PT |
2922 | { |
2923 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2924 | return MATCH_ERROR; | |
2925 | } | |
2926 | else if (gfc_current_ns->proc_name->ns->parent != NULL | |
66e4ab31 SK |
2927 | && gfc_find_symbol (name, |
2928 | gfc_current_ns->proc_name->ns->parent, | |
2929 | 1, &sym)) | |
636dff67 SK |
2930 | { |
2931 | gfc_error ("Type name '%s' at %C is ambiguous", name); | |
2932 | return MATCH_ERROR; | |
2933 | } | |
2934 | ||
2935 | if (sym == NULL) | |
2936 | { | |
2937 | gfc_error ("Cannot IMPORT '%s' from host scoping unit " | |
2938 | "at %C - does not exist.", name); | |
2939 | return MATCH_ERROR; | |
2940 | } | |
2941 | ||
d51347f9 | 2942 | if (gfc_find_symtree (gfc_current_ns->sym_root,name)) |
636dff67 SK |
2943 | { |
2944 | gfc_warning ("'%s' is already IMPORTed from host scoping unit " | |
2945 | "at %C.", name); | |
2946 | goto next_item; | |
2947 | } | |
2948 | ||
bc2a4733 | 2949 | st = gfc_new_symtree (&gfc_current_ns->sym_root, sym->name); |
636dff67 SK |
2950 | st->n.sym = sym; |
2951 | sym->refs++; | |
5a8af0b4 | 2952 | sym->attr.imported = 1; |
8998be20 TB |
2953 | |
2954 | goto next_item; | |
2955 | ||
2956 | case MATCH_NO: | |
2957 | break; | |
2958 | ||
2959 | case MATCH_ERROR: | |
2960 | return MATCH_ERROR; | |
2961 | } | |
2962 | ||
2963 | next_item: | |
2964 | if (gfc_match_eos () == MATCH_YES) | |
2965 | break; | |
2966 | if (gfc_match_char (',') != MATCH_YES) | |
2967 | goto syntax; | |
2968 | } | |
2969 | ||
2970 | return MATCH_YES; | |
2971 | ||
2972 | syntax: | |
2973 | gfc_error ("Syntax error in IMPORT statement at %C"); | |
2974 | return MATCH_ERROR; | |
2975 | } | |
e5ddaa24 | 2976 | |
66e4ab31 | 2977 | |
f2449db4 RS |
2978 | /* A minimal implementation of gfc_match without whitespace, escape |
2979 | characters or variable arguments. Returns true if the next | |
2980 | characters match the TARGET template exactly. */ | |
2981 | ||
2982 | static bool | |
2983 | match_string_p (const char *target) | |
2984 | { | |
2985 | const char *p; | |
2986 | ||
2987 | for (p = target; *p; p++) | |
8fc541d3 | 2988 | if ((char) gfc_next_ascii_char () != *p) |
f2449db4 RS |
2989 | return false; |
2990 | return true; | |
2991 | } | |
2992 | ||
6de9cd9a DN |
2993 | /* Matches an attribute specification including array specs. If |
2994 | successful, leaves the variables current_attr and current_as | |
2995 | holding the specification. Also sets the colon_seen variable for | |
2996 | later use by matchers associated with initializations. | |
2997 | ||
2998 | This subroutine is a little tricky in the sense that we don't know | |
2999 | if we really have an attr-spec until we hit the double colon. | |
3000 | Until that time, we can only return MATCH_NO. This forces us to | |
3001 | check for duplicate specification at this level. */ | |
3002 | ||
3003 | static match | |
3004 | match_attr_spec (void) | |
3005 | { | |
6de9cd9a DN |
3006 | /* Modifiers that can exist in a type statement. */ |
3007 | typedef enum | |
3008 | { GFC_DECL_BEGIN = 0, | |
3009 | DECL_ALLOCATABLE = GFC_DECL_BEGIN, DECL_DIMENSION, DECL_EXTERNAL, | |
3010 | DECL_IN, DECL_OUT, DECL_INOUT, DECL_INTRINSIC, DECL_OPTIONAL, | |
ee7e677f TB |
3011 | DECL_PARAMETER, DECL_POINTER, DECL_PROTECTED, DECL_PRIVATE, |
3012 | DECL_PUBLIC, DECL_SAVE, DECL_TARGET, DECL_VALUE, DECL_VOLATILE, | |
fe4e525c TB |
3013 | DECL_IS_BIND_C, DECL_CODIMENSION, DECL_ASYNCHRONOUS, DECL_CONTIGUOUS, |
3014 | DECL_NONE, GFC_DECL_END /* Sentinel */ | |
6de9cd9a DN |
3015 | } |
3016 | decl_types; | |
3017 | ||
3018 | /* GFC_DECL_END is the sentinel, index starts at 0. */ | |
3019 | #define NUM_DECL GFC_DECL_END | |
3020 | ||
6de9cd9a DN |
3021 | locus start, seen_at[NUM_DECL]; |
3022 | int seen[NUM_DECL]; | |
09639a83 | 3023 | unsigned int d; |
6de9cd9a DN |
3024 | const char *attr; |
3025 | match m; | |
17b1d2a0 | 3026 | gfc_try t; |
6de9cd9a DN |
3027 | |
3028 | gfc_clear_attr (¤t_attr); | |
63645982 | 3029 | start = gfc_current_locus; |
6de9cd9a DN |
3030 | |
3031 | current_as = NULL; | |
3032 | colon_seen = 0; | |
3033 | ||
3034 | /* See if we get all of the keywords up to the final double colon. */ | |
3035 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3036 | seen[d] = 0; | |
3037 | ||
3038 | for (;;) | |
3039 | { | |
8fc541d3 | 3040 | char ch; |
a8b3b0b6 | 3041 | |
f2449db4 RS |
3042 | d = DECL_NONE; |
3043 | gfc_gobble_whitespace (); | |
3044 | ||
8fc541d3 | 3045 | ch = gfc_next_ascii_char (); |
f2449db4 RS |
3046 | if (ch == ':') |
3047 | { | |
3048 | /* This is the successful exit condition for the loop. */ | |
8fc541d3 | 3049 | if (gfc_next_ascii_char () == ':') |
f2449db4 RS |
3050 | break; |
3051 | } | |
3052 | else if (ch == ',') | |
a8b3b0b6 | 3053 | { |
a8b3b0b6 | 3054 | gfc_gobble_whitespace (); |
8fc541d3 | 3055 | switch (gfc_peek_ascii_char ()) |
a8b3b0b6 | 3056 | { |
f2449db4 | 3057 | case 'a': |
1eee5628 TB |
3058 | gfc_next_ascii_char (); |
3059 | switch (gfc_next_ascii_char ()) | |
3060 | { | |
3061 | case 'l': | |
3062 | if (match_string_p ("locatable")) | |
3063 | { | |
3064 | /* Matched "allocatable". */ | |
3065 | d = DECL_ALLOCATABLE; | |
3066 | } | |
3067 | break; | |
3068 | ||
3069 | case 's': | |
3070 | if (match_string_p ("ynchronous")) | |
3071 | { | |
3072 | /* Matched "asynchronous". */ | |
3073 | d = DECL_ASYNCHRONOUS; | |
3074 | } | |
3075 | break; | |
3076 | } | |
fe4e525c | 3077 | break; |
f2449db4 RS |
3078 | |
3079 | case 'b': | |
a8b3b0b6 | 3080 | /* Try and match the bind(c). */ |
1eabf70a | 3081 | m = gfc_match_bind_c (NULL, true); |
129d15a3 | 3082 | if (m == MATCH_YES) |
a8b3b0b6 | 3083 | d = DECL_IS_BIND_C; |
129d15a3 JW |
3084 | else if (m == MATCH_ERROR) |
3085 | goto cleanup; | |
f2449db4 RS |
3086 | break; |
3087 | ||
be59db2d | 3088 | case 'c': |
fe4e525c TB |
3089 | gfc_next_ascii_char (); |
3090 | if ('o' != gfc_next_ascii_char ()) | |
3091 | break; | |
3092 | switch (gfc_next_ascii_char ()) | |
3093 | { | |
3094 | case 'd': | |
3095 | if (match_string_p ("imension")) | |
3096 | { | |
3097 | d = DECL_CODIMENSION; | |
3098 | break; | |
3099 | } | |
3100 | case 'n': | |
3101 | if (match_string_p ("tiguous")) | |
3102 | { | |
3103 | d = DECL_CONTIGUOUS; | |
3104 | break; | |
3105 | } | |
3106 | } | |
be59db2d TB |
3107 | break; |
3108 | ||
f2449db4 RS |
3109 | case 'd': |
3110 | if (match_string_p ("dimension")) | |
3111 | d = DECL_DIMENSION; | |
3112 | break; | |
3113 | ||
3114 | case 'e': | |
3115 | if (match_string_p ("external")) | |
3116 | d = DECL_EXTERNAL; | |
3117 | break; | |
3118 | ||
3119 | case 'i': | |
3120 | if (match_string_p ("int")) | |
3121 | { | |
8fc541d3 | 3122 | ch = gfc_next_ascii_char (); |
f2449db4 RS |
3123 | if (ch == 'e') |
3124 | { | |
3125 | if (match_string_p ("nt")) | |
3126 | { | |
3127 | /* Matched "intent". */ | |
3128 | /* TODO: Call match_intent_spec from here. */ | |
3129 | if (gfc_match (" ( in out )") == MATCH_YES) | |
3130 | d = DECL_INOUT; | |
3131 | else if (gfc_match (" ( in )") == MATCH_YES) | |
3132 | d = DECL_IN; | |
3133 | else if (gfc_match (" ( out )") == MATCH_YES) | |
3134 | d = DECL_OUT; | |
3135 | } | |
3136 | } | |
3137 | else if (ch == 'r') | |
3138 | { | |
3139 | if (match_string_p ("insic")) | |
3140 | { | |
3141 | /* Matched "intrinsic". */ | |
3142 | d = DECL_INTRINSIC; | |
3143 | } | |
3144 | } | |
3145 | } | |
3146 | break; | |
3147 | ||
3148 | case 'o': | |
3149 | if (match_string_p ("optional")) | |
3150 | d = DECL_OPTIONAL; | |
3151 | break; | |
3152 | ||
3153 | case 'p': | |
8fc541d3 FXC |
3154 | gfc_next_ascii_char (); |
3155 | switch (gfc_next_ascii_char ()) | |
f2449db4 RS |
3156 | { |
3157 | case 'a': | |
3158 | if (match_string_p ("rameter")) | |
3159 | { | |
3160 | /* Matched "parameter". */ | |
3161 | d = DECL_PARAMETER; | |
3162 | } | |
3163 | break; | |
3164 | ||
3165 | case 'o': | |
3166 | if (match_string_p ("inter")) | |
3167 | { | |
3168 | /* Matched "pointer". */ | |
3169 | d = DECL_POINTER; | |
3170 | } | |
3171 | break; | |
3172 | ||
3173 | case 'r': | |
8fc541d3 | 3174 | ch = gfc_next_ascii_char (); |
f2449db4 RS |
3175 | if (ch == 'i') |
3176 | { | |
3177 | if (match_string_p ("vate")) | |
3178 | { | |
3179 | /* Matched "private". */ | |
3180 | d = DECL_PRIVATE; | |
3181 | } | |
3182 | } | |
3183 | else if (ch == 'o') | |
3184 | { | |
3185 | if (match_string_p ("tected")) | |
3186 | { | |
3187 | /* Matched "protected". */ | |
3188 | d = DECL_PROTECTED; | |
3189 | } | |
3190 | } | |
3191 | break; | |
3192 | ||
3193 | case 'u': | |
3194 | if (match_string_p ("blic")) | |
3195 | { | |
3196 | /* Matched "public". */ | |
3197 | d = DECL_PUBLIC; | |
3198 | } | |
3199 | break; | |
3200 | } | |
3201 | break; | |
3202 | ||
3203 | case 's': | |
3204 | if (match_string_p ("save")) | |
3205 | d = DECL_SAVE; | |
3206 | break; | |
3207 | ||
3208 | case 't': | |
3209 | if (match_string_p ("target")) | |
3210 | d = DECL_TARGET; | |
3211 | break; | |
3212 | ||
3213 | case 'v': | |
8fc541d3 FXC |
3214 | gfc_next_ascii_char (); |
3215 | ch = gfc_next_ascii_char (); | |
f2449db4 RS |
3216 | if (ch == 'a') |
3217 | { | |
3218 | if (match_string_p ("lue")) | |
3219 | { | |
3220 | /* Matched "value". */ | |
3221 | d = DECL_VALUE; | |
3222 | } | |
3223 | } | |
3224 | else if (ch == 'o') | |
3225 | { | |
3226 | if (match_string_p ("latile")) | |
3227 | { | |
3228 | /* Matched "volatile". */ | |
3229 | d = DECL_VOLATILE; | |
3230 | } | |
3231 | } | |
3232 | break; | |
a8b3b0b6 CR |
3233 | } |
3234 | } | |
d468bcdb | 3235 | |
f2449db4 RS |
3236 | /* No double colon and no recognizable decl_type, so assume that |
3237 | we've been looking at something else the whole time. */ | |
3238 | if (d == DECL_NONE) | |
3239 | { | |
3240 | m = MATCH_NO; | |
3241 | goto cleanup; | |
3242 | } | |
d51347f9 | 3243 | |
acb388a0 JD |
3244 | /* Check to make sure any parens are paired up correctly. */ |
3245 | if (gfc_match_parens () == MATCH_ERROR) | |
3246 | { | |
3247 | m = MATCH_ERROR; | |
3248 | goto cleanup; | |
3249 | } | |
3250 | ||
6de9cd9a | 3251 | seen[d]++; |
63645982 | 3252 | seen_at[d] = gfc_current_locus; |
6de9cd9a | 3253 | |
d3a9eea2 | 3254 | if (d == DECL_DIMENSION || d == DECL_CODIMENSION) |
6de9cd9a | 3255 | { |
d3a9eea2 | 3256 | gfc_array_spec *as = NULL; |
6de9cd9a | 3257 | |
d3a9eea2 TB |
3258 | m = gfc_match_array_spec (&as, d == DECL_DIMENSION, |
3259 | d == DECL_CODIMENSION); | |
3260 | ||
3261 | if (current_as == NULL) | |
3262 | current_as = as; | |
3263 | else if (m == MATCH_YES) | |
6de9cd9a | 3264 | { |
d3a9eea2 TB |
3265 | merge_array_spec (as, current_as, false); |
3266 | gfc_free (as); | |
6de9cd9a DN |
3267 | } |
3268 | ||
be59db2d TB |
3269 | if (m == MATCH_NO) |
3270 | { | |
d3a9eea2 TB |
3271 | if (d == DECL_CODIMENSION) |
3272 | gfc_error ("Missing codimension specification at %C"); | |
3273 | else | |
3274 | gfc_error ("Missing dimension specification at %C"); | |
be59db2d TB |
3275 | m = MATCH_ERROR; |
3276 | } | |
3277 | ||
3278 | if (m == MATCH_ERROR) | |
3279 | goto cleanup; | |
3280 | } | |
6de9cd9a DN |
3281 | } |
3282 | ||
6de9cd9a DN |
3283 | /* Since we've seen a double colon, we have to be looking at an |
3284 | attr-spec. This means that we can now issue errors. */ | |
3285 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3286 | if (seen[d] > 1) | |
3287 | { | |
3288 | switch (d) | |
3289 | { | |
3290 | case DECL_ALLOCATABLE: | |
3291 | attr = "ALLOCATABLE"; | |
3292 | break; | |
1eee5628 TB |
3293 | case DECL_ASYNCHRONOUS: |
3294 | attr = "ASYNCHRONOUS"; | |
3295 | break; | |
be59db2d TB |
3296 | case DECL_CODIMENSION: |
3297 | attr = "CODIMENSION"; | |
3298 | break; | |
fe4e525c TB |
3299 | case DECL_CONTIGUOUS: |
3300 | attr = "CONTIGUOUS"; | |
3301 | break; | |
6de9cd9a DN |
3302 | case DECL_DIMENSION: |
3303 | attr = "DIMENSION"; | |
3304 | break; | |
3305 | case DECL_EXTERNAL: | |
3306 | attr = "EXTERNAL"; | |
3307 | break; | |
3308 | case DECL_IN: | |
3309 | attr = "INTENT (IN)"; | |
3310 | break; | |
3311 | case DECL_OUT: | |
3312 | attr = "INTENT (OUT)"; | |
3313 | break; | |
3314 | case DECL_INOUT: | |
3315 | attr = "INTENT (IN OUT)"; | |
3316 | break; | |
3317 | case DECL_INTRINSIC: | |
3318 | attr = "INTRINSIC"; | |
3319 | break; | |
3320 | case DECL_OPTIONAL: | |
3321 | attr = "OPTIONAL"; | |
3322 | break; | |
3323 | case DECL_PARAMETER: | |
3324 | attr = "PARAMETER"; | |
3325 | break; | |
3326 | case DECL_POINTER: | |
3327 | attr = "POINTER"; | |
3328 | break; | |
ee7e677f TB |
3329 | case DECL_PROTECTED: |
3330 | attr = "PROTECTED"; | |
3331 | break; | |
6de9cd9a DN |
3332 | case DECL_PRIVATE: |
3333 | attr = "PRIVATE"; | |
3334 | break; | |
3335 | case DECL_PUBLIC: | |
3336 | attr = "PUBLIC"; | |
3337 | break; | |
3338 | case DECL_SAVE: | |
3339 | attr = "SAVE"; | |
3340 | break; | |
3341 | case DECL_TARGET: | |
3342 | attr = "TARGET"; | |
3343 | break; | |
a8b3b0b6 CR |
3344 | case DECL_IS_BIND_C: |
3345 | attr = "IS_BIND_C"; | |
3346 | break; | |
3347 | case DECL_VALUE: | |
3348 | attr = "VALUE"; | |
3349 | break; | |
775e6c3a TB |
3350 | case DECL_VOLATILE: |
3351 | attr = "VOLATILE"; | |
3352 | break; | |
6de9cd9a | 3353 | default: |
66e4ab31 | 3354 | attr = NULL; /* This shouldn't happen. */ |
6de9cd9a DN |
3355 | } |
3356 | ||
3357 | gfc_error ("Duplicate %s attribute at %L", attr, &seen_at[d]); | |
3358 | m = MATCH_ERROR; | |
3359 | goto cleanup; | |
3360 | } | |
3361 | ||
3362 | /* Now that we've dealt with duplicate attributes, add the attributes | |
3363 | to the current attribute. */ | |
3364 | for (d = GFC_DECL_BEGIN; d != GFC_DECL_END; d++) | |
3365 | { | |
3366 | if (seen[d] == 0) | |
3367 | continue; | |
3368 | ||
3369 | if (gfc_current_state () == COMP_DERIVED | |
be59db2d TB |
3370 | && d != DECL_DIMENSION && d != DECL_CODIMENSION |
3371 | && d != DECL_POINTER && d != DECL_PRIVATE | |
fe4e525c | 3372 | && d != DECL_PUBLIC && d != DECL_CONTIGUOUS && d != DECL_NONE) |
6de9cd9a | 3373 | { |
5046aff5 PT |
3374 | if (d == DECL_ALLOCATABLE) |
3375 | { | |
636dff67 SK |
3376 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ALLOCATABLE " |
3377 | "attribute at %C in a TYPE definition") | |
d51347f9 | 3378 | == FAILURE) |
5046aff5 PT |
3379 | { |
3380 | m = MATCH_ERROR; | |
3381 | goto cleanup; | |
3382 | } | |
636dff67 SK |
3383 | } |
3384 | else | |
5046aff5 PT |
3385 | { |
3386 | gfc_error ("Attribute at %L is not allowed in a TYPE definition", | |
d51347f9 | 3387 | &seen_at[d]); |
5046aff5 PT |
3388 | m = MATCH_ERROR; |
3389 | goto cleanup; | |
3390 | } | |
6de9cd9a DN |
3391 | } |
3392 | ||
4213f93b | 3393 | if ((d == DECL_PRIVATE || d == DECL_PUBLIC) |
636dff67 | 3394 | && gfc_current_state () != COMP_MODULE) |
4213f93b PT |
3395 | { |
3396 | if (d == DECL_PRIVATE) | |
3397 | attr = "PRIVATE"; | |
3398 | else | |
3399 | attr = "PUBLIC"; | |
d51347f9 TB |
3400 | if (gfc_current_state () == COMP_DERIVED |
3401 | && gfc_state_stack->previous | |
3402 | && gfc_state_stack->previous->state == COMP_MODULE) | |
3403 | { | |
3404 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Attribute %s " | |
3405 | "at %L in a TYPE definition", attr, | |
3406 | &seen_at[d]) | |
3407 | == FAILURE) | |
3408 | { | |
3409 | m = MATCH_ERROR; | |
3410 | goto cleanup; | |
3411 | } | |
3412 | } | |
3413 | else | |
3414 | { | |
3415 | gfc_error ("%s attribute at %L is not allowed outside of the " | |
3416 | "specification part of a module", attr, &seen_at[d]); | |
3417 | m = MATCH_ERROR; | |
3418 | goto cleanup; | |
3419 | } | |
4213f93b PT |
3420 | } |
3421 | ||
6de9cd9a DN |
3422 | switch (d) |
3423 | { | |
3424 | case DECL_ALLOCATABLE: | |
3425 | t = gfc_add_allocatable (¤t_attr, &seen_at[d]); | |
3426 | break; | |
3427 | ||
1eee5628 TB |
3428 | case DECL_ASYNCHRONOUS: |
3429 | if (gfc_notify_std (GFC_STD_F2003, | |
3430 | "Fortran 2003: ASYNCHRONOUS attribute at %C") | |
3431 | == FAILURE) | |
3432 | t = FAILURE; | |
3433 | else | |
3434 | t = gfc_add_asynchronous (¤t_attr, NULL, &seen_at[d]); | |
3435 | break; | |
3436 | ||
be59db2d TB |
3437 | case DECL_CODIMENSION: |
3438 | t = gfc_add_codimension (¤t_attr, NULL, &seen_at[d]); | |
3439 | break; | |
3440 | ||
fe4e525c TB |
3441 | case DECL_CONTIGUOUS: |
3442 | if (gfc_notify_std (GFC_STD_F2008, | |
3443 | "Fortran 2008: CONTIGUOUS attribute at %C") | |
3444 | == FAILURE) | |
3445 | t = FAILURE; | |
3446 | else | |
3447 | t = gfc_add_contiguous (¤t_attr, NULL, &seen_at[d]); | |
3448 | break; | |
3449 | ||
6de9cd9a | 3450 | case DECL_DIMENSION: |
231b2fcc | 3451 | t = gfc_add_dimension (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
3452 | break; |
3453 | ||
3454 | case DECL_EXTERNAL: | |
3455 | t = gfc_add_external (¤t_attr, &seen_at[d]); | |
3456 | break; | |
3457 | ||
3458 | case DECL_IN: | |
3459 | t = gfc_add_intent (¤t_attr, INTENT_IN, &seen_at[d]); | |
3460 | break; | |
3461 | ||
3462 | case DECL_OUT: | |
3463 | t = gfc_add_intent (¤t_attr, INTENT_OUT, &seen_at[d]); | |
3464 | break; | |
3465 | ||
3466 | case DECL_INOUT: | |
3467 | t = gfc_add_intent (¤t_attr, INTENT_INOUT, &seen_at[d]); | |
3468 | break; | |
3469 | ||
3470 | case DECL_INTRINSIC: | |
3471 | t = gfc_add_intrinsic (¤t_attr, &seen_at[d]); | |
3472 | break; | |
3473 | ||
3474 | case DECL_OPTIONAL: | |
3475 | t = gfc_add_optional (¤t_attr, &seen_at[d]); | |
3476 | break; | |
3477 | ||
3478 | case DECL_PARAMETER: | |
231b2fcc | 3479 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, &seen_at[d]); |
6de9cd9a DN |
3480 | break; |
3481 | ||
3482 | case DECL_POINTER: | |
3483 | t = gfc_add_pointer (¤t_attr, &seen_at[d]); | |
3484 | break; | |
3485 | ||
ee7e677f TB |
3486 | case DECL_PROTECTED: |
3487 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
3488 | { | |
3489 | gfc_error ("PROTECTED at %C only allowed in specification " | |
3490 | "part of a module"); | |
3491 | t = FAILURE; | |
3492 | break; | |
3493 | } | |
3494 | ||
636dff67 SK |
3495 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED " |
3496 | "attribute at %C") | |
ee7e677f TB |
3497 | == FAILURE) |
3498 | t = FAILURE; | |
3499 | else | |
3500 | t = gfc_add_protected (¤t_attr, NULL, &seen_at[d]); | |
3501 | break; | |
3502 | ||
6de9cd9a | 3503 | case DECL_PRIVATE: |
231b2fcc TS |
3504 | t = gfc_add_access (¤t_attr, ACCESS_PRIVATE, NULL, |
3505 | &seen_at[d]); | |
6de9cd9a DN |
3506 | break; |
3507 | ||
3508 | case DECL_PUBLIC: | |
231b2fcc TS |
3509 | t = gfc_add_access (¤t_attr, ACCESS_PUBLIC, NULL, |
3510 | &seen_at[d]); | |
6de9cd9a DN |
3511 | break; |
3512 | ||
3513 | case DECL_SAVE: | |
231b2fcc | 3514 | t = gfc_add_save (¤t_attr, NULL, &seen_at[d]); |
6de9cd9a DN |
3515 | break; |
3516 | ||
3517 | case DECL_TARGET: | |
3518 | t = gfc_add_target (¤t_attr, &seen_at[d]); | |
3519 | break; | |
3520 | ||
a8b3b0b6 CR |
3521 | case DECL_IS_BIND_C: |
3522 | t = gfc_add_is_bind_c(¤t_attr, NULL, &seen_at[d], 0); | |
3523 | break; | |
3524 | ||
06469efd | 3525 | case DECL_VALUE: |
636dff67 SK |
3526 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE attribute " |
3527 | "at %C") | |
06469efd PT |
3528 | == FAILURE) |
3529 | t = FAILURE; | |
3530 | else | |
3531 | t = gfc_add_value (¤t_attr, NULL, &seen_at[d]); | |
3532 | break; | |
3533 | ||
775e6c3a TB |
3534 | case DECL_VOLATILE: |
3535 | if (gfc_notify_std (GFC_STD_F2003, | |
636dff67 | 3536 | "Fortran 2003: VOLATILE attribute at %C") |
775e6c3a TB |
3537 | == FAILURE) |
3538 | t = FAILURE; | |
3539 | else | |
3540 | t = gfc_add_volatile (¤t_attr, NULL, &seen_at[d]); | |
3541 | break; | |
3542 | ||
6de9cd9a DN |
3543 | default: |
3544 | gfc_internal_error ("match_attr_spec(): Bad attribute"); | |
3545 | } | |
3546 | ||
3547 | if (t == FAILURE) | |
3548 | { | |
3549 | m = MATCH_ERROR; | |
3550 | goto cleanup; | |
3551 | } | |
3552 | } | |
3553 | ||
3554 | colon_seen = 1; | |
3555 | return MATCH_YES; | |
3556 | ||
3557 | cleanup: | |
63645982 | 3558 | gfc_current_locus = start; |
6de9cd9a DN |
3559 | gfc_free_array_spec (current_as); |
3560 | current_as = NULL; | |
3561 | return m; | |
3562 | } | |
3563 | ||
3564 | ||
a8b3b0b6 CR |
3565 | /* Set the binding label, dest_label, either with the binding label |
3566 | stored in the given gfc_typespec, ts, or if none was provided, it | |
3567 | will be the symbol name in all lower case, as required by the draft | |
3568 | (J3/04-007, section 15.4.1). If a binding label was given and | |
3569 | there is more than one argument (num_idents), it is an error. */ | |
3570 | ||
17b1d2a0 | 3571 | gfc_try |
a8b3b0b6 CR |
3572 | set_binding_label (char *dest_label, const char *sym_name, int num_idents) |
3573 | { | |
ad4a2f64 | 3574 | if (num_idents > 1 && has_name_equals) |
a8b3b0b6 | 3575 | { |
ad4a2f64 TB |
3576 | gfc_error ("Multiple identifiers provided with " |
3577 | "single NAME= specifier at %C"); | |
3578 | return FAILURE; | |
3579 | } | |
a8b3b0b6 | 3580 | |
ad4a2f64 TB |
3581 | if (curr_binding_label[0] != '\0') |
3582 | { | |
a8b3b0b6 | 3583 | /* Binding label given; store in temp holder til have sym. */ |
c5b5a17a | 3584 | strcpy (dest_label, curr_binding_label); |
a8b3b0b6 CR |
3585 | } |
3586 | else | |
3587 | { | |
3588 | /* No binding label given, and the NAME= specifier did not exist, | |
3589 | which means there was no NAME="". */ | |
3590 | if (sym_name != NULL && has_name_equals == 0) | |
c5b5a17a | 3591 | strcpy (dest_label, sym_name); |
a8b3b0b6 CR |
3592 | } |
3593 | ||
3594 | return SUCCESS; | |
3595 | } | |
3596 | ||
3597 | ||
3598 | /* Set the status of the given common block as being BIND(C) or not, | |
3599 | depending on the given parameter, is_bind_c. */ | |
3600 | ||
3601 | void | |
3602 | set_com_block_bind_c (gfc_common_head *com_block, int is_bind_c) | |
3603 | { | |
3604 | com_block->is_bind_c = is_bind_c; | |
3605 | return; | |
3606 | } | |
3607 | ||
3608 | ||
3609 | /* Verify that the given gfc_typespec is for a C interoperable type. */ | |
3610 | ||
17b1d2a0 | 3611 | gfc_try |
2ec855f1 | 3612 | verify_c_interop (gfc_typespec *ts) |
a8b3b0b6 | 3613 | { |
bc21d315 JW |
3614 | if (ts->type == BT_DERIVED && ts->u.derived != NULL) |
3615 | return (ts->u.derived->ts.is_c_interop ? SUCCESS : FAILURE); | |
a8b3b0b6 CR |
3616 | else if (ts->is_c_interop != 1) |
3617 | return FAILURE; | |
3618 | ||
3619 | return SUCCESS; | |
3620 | } | |
3621 | ||
3622 | ||
3623 | /* Verify that the variables of a given common block, which has been | |
3624 | defined with the attribute specifier bind(c), to be of a C | |
3625 | interoperable type. Errors will be reported here, if | |
3626 | encountered. */ | |
3627 | ||
17b1d2a0 | 3628 | gfc_try |
a8b3b0b6 CR |
3629 | verify_com_block_vars_c_interop (gfc_common_head *com_block) |
3630 | { | |
3631 | gfc_symbol *curr_sym = NULL; | |
17b1d2a0 | 3632 | gfc_try retval = SUCCESS; |
a8b3b0b6 CR |
3633 | |
3634 | curr_sym = com_block->head; | |
3635 | ||
3636 | /* Make sure we have at least one symbol. */ | |
3637 | if (curr_sym == NULL) | |
3638 | return retval; | |
3639 | ||
3640 | /* Here we know we have a symbol, so we'll execute this loop | |
3641 | at least once. */ | |
3642 | do | |
3643 | { | |
3644 | /* The second to last param, 1, says this is in a common block. */ | |
3645 | retval = verify_bind_c_sym (curr_sym, &(curr_sym->ts), 1, com_block); | |
3646 | curr_sym = curr_sym->common_next; | |
3647 | } while (curr_sym != NULL); | |
3648 | ||
3649 | return retval; | |
3650 | } | |
3651 | ||
3652 | ||
3653 | /* Verify that a given BIND(C) symbol is C interoperable. If it is not, | |
3654 | an appropriate error message is reported. */ | |
3655 | ||
17b1d2a0 | 3656 | gfc_try |
a8b3b0b6 CR |
3657 | verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts, |
3658 | int is_in_common, gfc_common_head *com_block) | |
3659 | { | |
8327f9c2 | 3660 | bool bind_c_function = false; |
17b1d2a0 | 3661 | gfc_try retval = SUCCESS; |
d8fa96e0 | 3662 | |
8327f9c2 TB |
3663 | if (tmp_sym->attr.function && tmp_sym->attr.is_bind_c) |
3664 | bind_c_function = true; | |
3665 | ||
d8fa96e0 CR |
3666 | if (tmp_sym->attr.function && tmp_sym->result != NULL) |
3667 | { | |
3668 | tmp_sym = tmp_sym->result; | |
3669 | /* Make sure it wasn't an implicitly typed result. */ | |
3670 | if (tmp_sym->attr.implicit_type) | |
3671 | { | |
3672 | gfc_warning ("Implicitly declared BIND(C) function '%s' at " | |
3673 | "%L may not be C interoperable", tmp_sym->name, | |
3674 | &tmp_sym->declared_at); | |
3675 | tmp_sym->ts.f90_type = tmp_sym->ts.type; | |
3676 | /* Mark it as C interoperable to prevent duplicate warnings. */ | |
3677 | tmp_sym->ts.is_c_interop = 1; | |
3678 | tmp_sym->attr.is_c_interop = 1; | |
3679 | } | |
3680 | } | |
8327f9c2 | 3681 | |
a8b3b0b6 CR |
3682 | /* Here, we know we have the bind(c) attribute, so if we have |
3683 | enough type info, then verify that it's a C interop kind. | |
3684 | The info could be in the symbol already, or possibly still in | |
3685 | the given ts (current_ts), so look in both. */ | |
3686 | if (tmp_sym->ts.type != BT_UNKNOWN || ts->type != BT_UNKNOWN) | |
3687 | { | |
2ec855f1 | 3688 | if (verify_c_interop (&(tmp_sym->ts)) != SUCCESS) |
a8b3b0b6 CR |
3689 | { |
3690 | /* See if we're dealing with a sym in a common block or not. */ | |
3691 | if (is_in_common == 1) | |
3692 | { | |
3693 | gfc_warning ("Variable '%s' in common block '%s' at %L " | |
3694 | "may not be a C interoperable " | |
3695 | "kind though common block '%s' is BIND(C)", | |
3696 | tmp_sym->name, com_block->name, | |
3697 | &(tmp_sym->declared_at), com_block->name); | |
3698 | } | |
3699 | else | |
3700 | { | |
3701 | if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED) | |
3702 | gfc_error ("Type declaration '%s' at %L is not C " | |
3703 | "interoperable but it is BIND(C)", | |
3704 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3705 | else | |
3706 | gfc_warning ("Variable '%s' at %L " | |
3707 | "may not be a C interoperable " | |
3708 | "kind but it is bind(c)", | |
3709 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3710 | } | |
3711 | } | |
3712 | ||
3713 | /* Variables declared w/in a common block can't be bind(c) | |
3714 | since there's no way for C to see these variables, so there's | |
3715 | semantically no reason for the attribute. */ | |
3716 | if (is_in_common == 1 && tmp_sym->attr.is_bind_c == 1) | |
3717 | { | |
3718 | gfc_error ("Variable '%s' in common block '%s' at " | |
3719 | "%L cannot be declared with BIND(C) " | |
3720 | "since it is not a global", | |
3721 | tmp_sym->name, com_block->name, | |
3722 | &(tmp_sym->declared_at)); | |
3723 | retval = FAILURE; | |
3724 | } | |
3725 | ||
3726 | /* Scalar variables that are bind(c) can not have the pointer | |
3727 | or allocatable attributes. */ | |
3728 | if (tmp_sym->attr.is_bind_c == 1) | |
3729 | { | |
3730 | if (tmp_sym->attr.pointer == 1) | |
3731 | { | |
3732 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3733 | "POINTER and BIND(C) attributes", | |
3734 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3735 | retval = FAILURE; | |
3736 | } | |
3737 | ||
3738 | if (tmp_sym->attr.allocatable == 1) | |
3739 | { | |
3740 | gfc_error ("Variable '%s' at %L cannot have both the " | |
3741 | "ALLOCATABLE and BIND(C) attributes", | |
3742 | tmp_sym->name, &(tmp_sym->declared_at)); | |
3743 | retval = FAILURE; | |
3744 | } | |
3745 | ||
8327f9c2 TB |
3746 | } |
3747 | ||
3748 | /* If it is a BIND(C) function, make sure the return value is a | |
3749 | scalar value. The previous tests in this function made sure | |
3750 | the type is interoperable. */ | |
3751 | if (bind_c_function && tmp_sym->as != NULL) | |
3752 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " | |
3753 | "be an array", tmp_sym->name, &(tmp_sym->declared_at)); | |
3754 | ||
3755 | /* BIND(C) functions can not return a character string. */ | |
3756 | if (bind_c_function && tmp_sym->ts.type == BT_CHARACTER) | |
bc21d315 JW |
3757 | if (tmp_sym->ts.u.cl == NULL || tmp_sym->ts.u.cl->length == NULL |
3758 | || tmp_sym->ts.u.cl->length->expr_type != EXPR_CONSTANT | |
3759 | || mpz_cmp_si (tmp_sym->ts.u.cl->length->value.integer, 1) != 0) | |
8327f9c2 | 3760 | gfc_error ("Return type of BIND(C) function '%s' at %L cannot " |
a8b3b0b6 CR |
3761 | "be a character string", tmp_sym->name, |
3762 | &(tmp_sym->declared_at)); | |
a8b3b0b6 CR |
3763 | } |
3764 | ||
3765 | /* See if the symbol has been marked as private. If it has, make sure | |
3766 | there is no binding label and warn the user if there is one. */ | |
3767 | if (tmp_sym->attr.access == ACCESS_PRIVATE | |
3768 | && tmp_sym->binding_label[0] != '\0') | |
3769 | /* Use gfc_warning_now because we won't say that the symbol fails | |
3770 | just because of this. */ | |
3771 | gfc_warning_now ("Symbol '%s' at %L is marked PRIVATE but has been " | |
3772 | "given the binding label '%s'", tmp_sym->name, | |
3773 | &(tmp_sym->declared_at), tmp_sym->binding_label); | |
3774 | ||
3775 | return retval; | |
3776 | } | |
3777 | ||
3778 | ||
3779 | /* Set the appropriate fields for a symbol that's been declared as | |
3780 | BIND(C) (the is_bind_c flag and the binding label), and verify that | |
3781 | the type is C interoperable. Errors are reported by the functions | |
3782 | used to set/test these fields. */ | |
3783 | ||
17b1d2a0 | 3784 | gfc_try |
a8b3b0b6 CR |
3785 | set_verify_bind_c_sym (gfc_symbol *tmp_sym, int num_idents) |
3786 | { | |
17b1d2a0 | 3787 | gfc_try retval = SUCCESS; |
a8b3b0b6 CR |
3788 | |
3789 | /* TODO: Do we need to make sure the vars aren't marked private? */ | |
3790 | ||
3791 | /* Set the is_bind_c bit in symbol_attribute. */ | |
3792 | gfc_add_is_bind_c (&(tmp_sym->attr), tmp_sym->name, &gfc_current_locus, 0); | |
3793 | ||
3794 | if (set_binding_label (tmp_sym->binding_label, tmp_sym->name, | |
3795 | num_idents) != SUCCESS) | |
3796 | return FAILURE; | |
3797 | ||
3798 | return retval; | |
3799 | } | |
3800 | ||
3801 | ||
3802 | /* Set the fields marking the given common block as BIND(C), including | |
3803 | a binding label, and report any errors encountered. */ | |
3804 | ||
17b1d2a0 | 3805 | gfc_try |
a8b3b0b6 CR |
3806 | set_verify_bind_c_com_block (gfc_common_head *com_block, int num_idents) |
3807 | { | |
17b1d2a0 | 3808 | gfc_try retval = SUCCESS; |
a8b3b0b6 CR |
3809 | |
3810 | /* destLabel, common name, typespec (which may have binding label). */ | |
3811 | if (set_binding_label (com_block->binding_label, com_block->name, num_idents) | |
3812 | != SUCCESS) | |
3813 | return FAILURE; | |
3814 | ||
3815 | /* Set the given common block (com_block) to being bind(c) (1). */ | |
3816 | set_com_block_bind_c (com_block, 1); | |
3817 | ||
3818 | return retval; | |
3819 | } | |
3820 | ||
3821 | ||
3822 | /* Retrieve the list of one or more identifiers that the given bind(c) | |
3823 | attribute applies to. */ | |
3824 | ||
17b1d2a0 | 3825 | gfc_try |
a8b3b0b6 CR |
3826 | get_bind_c_idents (void) |
3827 | { | |
3828 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
3829 | int num_idents = 0; | |
3830 | gfc_symbol *tmp_sym = NULL; | |
3831 | match found_id; | |
3832 | gfc_common_head *com_block = NULL; | |
3833 | ||
3834 | if (gfc_match_name (name) == MATCH_YES) | |
3835 | { | |
3836 | found_id = MATCH_YES; | |
3837 | gfc_get_ha_symbol (name, &tmp_sym); | |
3838 | } | |
3839 | else if (match_common_name (name) == MATCH_YES) | |
3840 | { | |
3841 | found_id = MATCH_YES; | |
3842 | com_block = gfc_get_common (name, 0); | |
3843 | } | |
3844 | else | |
3845 | { | |
3846 | gfc_error ("Need either entity or common block name for " | |
3847 | "attribute specification statement at %C"); | |
3848 | return FAILURE; | |
3849 | } | |
3850 | ||
3851 | /* Save the current identifier and look for more. */ | |
3852 | do | |
3853 | { | |
3854 | /* Increment the number of identifiers found for this spec stmt. */ | |
3855 | num_idents++; | |
3856 | ||
3857 | /* Make sure we have a sym or com block, and verify that it can | |
3858 | be bind(c). Set the appropriate field(s) and look for more | |
3859 | identifiers. */ | |
3860 | if (tmp_sym != NULL || com_block != NULL) | |
3861 | { | |
3862 | if (tmp_sym != NULL) | |
3863 | { | |
3864 | if (set_verify_bind_c_sym (tmp_sym, num_idents) | |
3865 | != SUCCESS) | |
3866 | return FAILURE; | |
3867 | } | |
3868 | else | |
3869 | { | |
3870 | if (set_verify_bind_c_com_block(com_block, num_idents) | |
3871 | != SUCCESS) | |
3872 | return FAILURE; | |
3873 | } | |
3874 | ||
3875 | /* Look to see if we have another identifier. */ | |
3876 | tmp_sym = NULL; | |
3877 | if (gfc_match_eos () == MATCH_YES) | |
3878 | found_id = MATCH_NO; | |
3879 | else if (gfc_match_char (',') != MATCH_YES) | |
3880 | found_id = MATCH_NO; | |
3881 | else if (gfc_match_name (name) == MATCH_YES) | |
3882 | { | |
3883 | found_id = MATCH_YES; | |
3884 | gfc_get_ha_symbol (name, &tmp_sym); | |
3885 | } | |
3886 | else if (match_common_name (name) == MATCH_YES) | |
3887 | { | |
3888 | found_id = MATCH_YES; | |
3889 | com_block = gfc_get_common (name, 0); | |
3890 | } | |
3891 | else | |
3892 | { | |
3893 | gfc_error ("Missing entity or common block name for " | |
3894 | "attribute specification statement at %C"); | |
3895 | return FAILURE; | |
3896 | } | |
3897 | } | |
3898 | else | |
3899 | { | |
3900 | gfc_internal_error ("Missing symbol"); | |
3901 | } | |
3902 | } while (found_id == MATCH_YES); | |
3903 | ||
3904 | /* if we get here we were successful */ | |
3905 | return SUCCESS; | |
3906 | } | |
3907 | ||
3908 | ||
3909 | /* Try and match a BIND(C) attribute specification statement. */ | |
3910 | ||
3911 | match | |
3912 | gfc_match_bind_c_stmt (void) | |
3913 | { | |
3914 | match found_match = MATCH_NO; | |
3915 | gfc_typespec *ts; | |
3916 | ||
3917 | ts = ¤t_ts; | |
3918 | ||
3919 | /* This may not be necessary. */ | |
3920 | gfc_clear_ts (ts); | |
3921 | /* Clear the temporary binding label holder. */ | |
3922 | curr_binding_label[0] = '\0'; | |
3923 | ||
3924 | /* Look for the bind(c). */ | |
1eabf70a | 3925 | found_match = gfc_match_bind_c (NULL, true); |
a8b3b0b6 CR |
3926 | |
3927 | if (found_match == MATCH_YES) | |
3928 | { | |
3929 | /* Look for the :: now, but it is not required. */ | |
3930 | gfc_match (" :: "); | |
3931 | ||
3932 | /* Get the identifier(s) that needs to be updated. This may need to | |
3933 | change to hand the flag(s) for the attr specified so all identifiers | |
3934 | found can have all appropriate parts updated (assuming that the same | |
3935 | spec stmt can have multiple attrs, such as both bind(c) and | |
3936 | allocatable...). */ | |
3937 | if (get_bind_c_idents () != SUCCESS) | |
3938 | /* Error message should have printed already. */ | |
3939 | return MATCH_ERROR; | |
3940 | } | |
3941 | ||
3942 | return found_match; | |
3943 | } | |
3944 | ||
3945 | ||
6de9cd9a DN |
3946 | /* Match a data declaration statement. */ |
3947 | ||
3948 | match | |
3949 | gfc_match_data_decl (void) | |
3950 | { | |
3951 | gfc_symbol *sym; | |
3952 | match m; | |
949d5b72 | 3953 | int elem; |
6de9cd9a | 3954 | |
a8b3b0b6 CR |
3955 | num_idents_on_line = 0; |
3956 | ||
e74f1cc8 | 3957 | m = gfc_match_decl_type_spec (¤t_ts, 0); |
6de9cd9a DN |
3958 | if (m != MATCH_YES) |
3959 | return m; | |
3960 | ||
2e23972e JW |
3961 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
3962 | && gfc_current_state () != COMP_DERIVED) | |
6de9cd9a | 3963 | { |
bc21d315 | 3964 | sym = gfc_use_derived (current_ts.u.derived); |
6de9cd9a DN |
3965 | |
3966 | if (sym == NULL) | |
3967 | { | |
3968 | m = MATCH_ERROR; | |
3969 | goto cleanup; | |
3970 | } | |
3971 | ||
bc21d315 | 3972 | current_ts.u.derived = sym; |
6de9cd9a DN |
3973 | } |
3974 | ||
3975 | m = match_attr_spec (); | |
3976 | if (m == MATCH_ERROR) | |
3977 | { | |
3978 | m = MATCH_NO; | |
3979 | goto cleanup; | |
3980 | } | |
3981 | ||
2e23972e JW |
3982 | if ((current_ts.type == BT_DERIVED || current_ts.type == BT_CLASS) |
3983 | && current_ts.u.derived->components == NULL | |
bc21d315 | 3984 | && !current_ts.u.derived->attr.zero_comp) |
6de9cd9a DN |
3985 | { |
3986 | ||
3987 | if (current_attr.pointer && gfc_current_state () == COMP_DERIVED) | |
3988 | goto ok; | |
3989 | ||
bc21d315 JW |
3990 | gfc_find_symbol (current_ts.u.derived->name, |
3991 | current_ts.u.derived->ns->parent, 1, &sym); | |
6de9cd9a | 3992 | |
976e21f6 | 3993 | /* Any symbol that we find had better be a type definition |
636dff67 | 3994 | which has its components defined. */ |
976e21f6 | 3995 | if (sym != NULL && sym->attr.flavor == FL_DERIVED |
bc21d315 JW |
3996 | && (current_ts.u.derived->components != NULL |
3997 | || current_ts.u.derived->attr.zero_comp)) | |
6de9cd9a DN |
3998 | goto ok; |
3999 | ||
976e21f6 PT |
4000 | /* Now we have an error, which we signal, and then fix up |
4001 | because the knock-on is plain and simple confusing. */ | |
4002 | gfc_error_now ("Derived type at %C has not been previously defined " | |
636dff67 | 4003 | "and so cannot appear in a derived type definition"); |
976e21f6 PT |
4004 | current_attr.pointer = 1; |
4005 | goto ok; | |
6de9cd9a DN |
4006 | } |
4007 | ||
4008 | ok: | |
4009 | /* If we have an old-style character declaration, and no new-style | |
4010 | attribute specifications, then there a comma is optional between | |
4011 | the type specification and the variable list. */ | |
4012 | if (m == MATCH_NO && current_ts.type == BT_CHARACTER && old_char_selector) | |
4013 | gfc_match_char (','); | |
4014 | ||
949d5b72 PT |
4015 | /* Give the types/attributes to symbols that follow. Give the element |
4016 | a number so that repeat character length expressions can be copied. */ | |
4017 | elem = 1; | |
6de9cd9a DN |
4018 | for (;;) |
4019 | { | |
a8b3b0b6 | 4020 | num_idents_on_line++; |
949d5b72 | 4021 | m = variable_decl (elem++); |
6de9cd9a DN |
4022 | if (m == MATCH_ERROR) |
4023 | goto cleanup; | |
4024 | if (m == MATCH_NO) | |
4025 | break; | |
4026 | ||
4027 | if (gfc_match_eos () == MATCH_YES) | |
4028 | goto cleanup; | |
4029 | if (gfc_match_char (',') != MATCH_YES) | |
4030 | break; | |
4031 | } | |
4032 | ||
8f81c3c6 PT |
4033 | if (gfc_error_flag_test () == 0) |
4034 | gfc_error ("Syntax error in data declaration at %C"); | |
6de9cd9a DN |
4035 | m = MATCH_ERROR; |
4036 | ||
a9f6f1f2 JD |
4037 | gfc_free_data_all (gfc_current_ns); |
4038 | ||
6de9cd9a DN |
4039 | cleanup: |
4040 | gfc_free_array_spec (current_as); | |
4041 | current_as = NULL; | |
4042 | return m; | |
4043 | } | |
4044 | ||
4045 | ||
4046 | /* Match a prefix associated with a function or subroutine | |
4047 | declaration. If the typespec pointer is nonnull, then a typespec | |
4048 | can be matched. Note that if nothing matches, MATCH_YES is | |
4049 | returned (the null string was matched). */ | |
4050 | ||
1c8bcdf7 PT |
4051 | match |
4052 | gfc_match_prefix (gfc_typespec *ts) | |
6de9cd9a | 4053 | { |
7389bce6 | 4054 | bool seen_type; |
6de9cd9a DN |
4055 | |
4056 | gfc_clear_attr (¤t_attr); | |
4057 | seen_type = 0; | |
4058 | ||
3df684e2 DK |
4059 | gcc_assert (!gfc_matching_prefix); |
4060 | gfc_matching_prefix = true; | |
f37e928c | 4061 | |
6de9cd9a DN |
4062 | loop: |
4063 | if (!seen_type && ts != NULL | |
e74f1cc8 | 4064 | && gfc_match_decl_type_spec (ts, 0) == MATCH_YES |
6de9cd9a DN |
4065 | && gfc_match_space () == MATCH_YES) |
4066 | { | |
4067 | ||
4068 | seen_type = 1; | |
4069 | goto loop; | |
4070 | } | |
4071 | ||
4072 | if (gfc_match ("elemental% ") == MATCH_YES) | |
4073 | { | |
4074 | if (gfc_add_elemental (¤t_attr, NULL) == FAILURE) | |
f37e928c | 4075 | goto error; |
6de9cd9a DN |
4076 | |
4077 | goto loop; | |
4078 | } | |
4079 | ||
4080 | if (gfc_match ("pure% ") == MATCH_YES) | |
4081 | { | |
4082 | if (gfc_add_pure (¤t_attr, NULL) == FAILURE) | |
f37e928c | 4083 | goto error; |
6de9cd9a DN |
4084 | |
4085 | goto loop; | |
4086 | } | |
4087 | ||
4088 | if (gfc_match ("recursive% ") == MATCH_YES) | |
4089 | { | |
4090 | if (gfc_add_recursive (¤t_attr, NULL) == FAILURE) | |
f37e928c | 4091 | goto error; |
6de9cd9a DN |
4092 | |
4093 | goto loop; | |
4094 | } | |
4095 | ||
4096 | /* At this point, the next item is not a prefix. */ | |
3df684e2 DK |
4097 | gcc_assert (gfc_matching_prefix); |
4098 | gfc_matching_prefix = false; | |
6de9cd9a | 4099 | return MATCH_YES; |
f37e928c DK |
4100 | |
4101 | error: | |
3df684e2 DK |
4102 | gcc_assert (gfc_matching_prefix); |
4103 | gfc_matching_prefix = false; | |
f37e928c | 4104 | return MATCH_ERROR; |
6de9cd9a DN |
4105 | } |
4106 | ||
4107 | ||
1c8bcdf7 | 4108 | /* Copy attributes matched by gfc_match_prefix() to attributes on a symbol. */ |
6de9cd9a | 4109 | |
17b1d2a0 | 4110 | static gfc_try |
636dff67 | 4111 | copy_prefix (symbol_attribute *dest, locus *where) |
6de9cd9a | 4112 | { |
6de9cd9a DN |
4113 | if (current_attr.pure && gfc_add_pure (dest, where) == FAILURE) |
4114 | return FAILURE; | |
4115 | ||
4116 | if (current_attr.elemental && gfc_add_elemental (dest, where) == FAILURE) | |
4117 | return FAILURE; | |
4118 | ||
4119 | if (current_attr.recursive && gfc_add_recursive (dest, where) == FAILURE) | |
4120 | return FAILURE; | |
4121 | ||
4122 | return SUCCESS; | |
4123 | } | |
4124 | ||
4125 | ||
4126 | /* Match a formal argument list. */ | |
4127 | ||
4128 | match | |
636dff67 | 4129 | gfc_match_formal_arglist (gfc_symbol *progname, int st_flag, int null_flag) |
6de9cd9a DN |
4130 | { |
4131 | gfc_formal_arglist *head, *tail, *p, *q; | |
4132 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4133 | gfc_symbol *sym; | |
4134 | match m; | |
4135 | ||
4136 | head = tail = NULL; | |
4137 | ||
4138 | if (gfc_match_char ('(') != MATCH_YES) | |
4139 | { | |
4140 | if (null_flag) | |
4141 | goto ok; | |
4142 | return MATCH_NO; | |
4143 | } | |
4144 | ||
4145 | if (gfc_match_char (')') == MATCH_YES) | |
4146 | goto ok; | |
4147 | ||
4148 | for (;;) | |
4149 | { | |
4150 | if (gfc_match_char ('*') == MATCH_YES) | |
4151 | sym = NULL; | |
4152 | else | |
4153 | { | |
4154 | m = gfc_match_name (name); | |
4155 | if (m != MATCH_YES) | |
4156 | goto cleanup; | |
4157 | ||
4158 | if (gfc_get_symbol (name, NULL, &sym)) | |
4159 | goto cleanup; | |
4160 | } | |
4161 | ||
4162 | p = gfc_get_formal_arglist (); | |
4163 | ||
4164 | if (head == NULL) | |
4165 | head = tail = p; | |
4166 | else | |
4167 | { | |
4168 | tail->next = p; | |
4169 | tail = p; | |
4170 | } | |
4171 | ||
4172 | tail->sym = sym; | |
4173 | ||
4174 | /* We don't add the VARIABLE flavor because the name could be a | |
636dff67 SK |
4175 | dummy procedure. We don't apply these attributes to formal |
4176 | arguments of statement functions. */ | |
6de9cd9a | 4177 | if (sym != NULL && !st_flag |
231b2fcc | 4178 | && (gfc_add_dummy (&sym->attr, sym->name, NULL) == FAILURE |
6de9cd9a DN |
4179 | || gfc_missing_attr (&sym->attr, NULL) == FAILURE)) |
4180 | { | |
4181 | m = MATCH_ERROR; | |
4182 | goto cleanup; | |
4183 | } | |
4184 | ||
4185 | /* The name of a program unit can be in a different namespace, | |
636dff67 SK |
4186 | so check for it explicitly. After the statement is accepted, |
4187 | the name is checked for especially in gfc_get_symbol(). */ | |
6de9cd9a DN |
4188 | if (gfc_new_block != NULL && sym != NULL |
4189 | && strcmp (sym->name, gfc_new_block->name) == 0) | |
4190 | { | |
4191 | gfc_error ("Name '%s' at %C is the name of the procedure", | |
4192 | sym->name); | |
4193 | m = MATCH_ERROR; | |
4194 | goto cleanup; | |
4195 | } | |
4196 | ||
4197 | if (gfc_match_char (')') == MATCH_YES) | |
4198 | goto ok; | |
4199 | ||
4200 | m = gfc_match_char (','); | |
4201 | if (m != MATCH_YES) | |
4202 | { | |
4203 | gfc_error ("Unexpected junk in formal argument list at %C"); | |
4204 | goto cleanup; | |
4205 | } | |
4206 | } | |
4207 | ||
4208 | ok: | |
4209 | /* Check for duplicate symbols in the formal argument list. */ | |
4210 | if (head != NULL) | |
4211 | { | |
4212 | for (p = head; p->next; p = p->next) | |
4213 | { | |
4214 | if (p->sym == NULL) | |
4215 | continue; | |
4216 | ||
4217 | for (q = p->next; q; q = q->next) | |
4218 | if (p->sym == q->sym) | |
4219 | { | |
636dff67 SK |
4220 | gfc_error ("Duplicate symbol '%s' in formal argument list " |
4221 | "at %C", p->sym->name); | |
6de9cd9a DN |
4222 | |
4223 | m = MATCH_ERROR; | |
4224 | goto cleanup; | |
4225 | } | |
4226 | } | |
4227 | } | |
4228 | ||
66e4ab31 SK |
4229 | if (gfc_add_explicit_interface (progname, IFSRC_DECL, head, NULL) |
4230 | == FAILURE) | |
6de9cd9a DN |
4231 | { |
4232 | m = MATCH_ERROR; | |
4233 | goto cleanup; | |
4234 | } | |
4235 | ||
4236 | return MATCH_YES; | |
4237 | ||
4238 | cleanup: | |
4239 | gfc_free_formal_arglist (head); | |
4240 | return m; | |
4241 | } | |
4242 | ||
4243 | ||
4244 | /* Match a RESULT specification following a function declaration or | |
4245 | ENTRY statement. Also matches the end-of-statement. */ | |
4246 | ||
4247 | static match | |
66e4ab31 | 4248 | match_result (gfc_symbol *function, gfc_symbol **result) |
6de9cd9a DN |
4249 | { |
4250 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4251 | gfc_symbol *r; | |
4252 | match m; | |
4253 | ||
4254 | if (gfc_match (" result (") != MATCH_YES) | |
4255 | return MATCH_NO; | |
4256 | ||
4257 | m = gfc_match_name (name); | |
4258 | if (m != MATCH_YES) | |
4259 | return m; | |
4260 | ||
a8b3b0b6 CR |
4261 | /* Get the right paren, and that's it because there could be the |
4262 | bind(c) attribute after the result clause. */ | |
4263 | if (gfc_match_char(')') != MATCH_YES) | |
6de9cd9a | 4264 | { |
a8b3b0b6 | 4265 | /* TODO: should report the missing right paren here. */ |
6de9cd9a DN |
4266 | return MATCH_ERROR; |
4267 | } | |
4268 | ||
4269 | if (strcmp (function->name, name) == 0) | |
4270 | { | |
636dff67 | 4271 | gfc_error ("RESULT variable at %C must be different than function name"); |
6de9cd9a DN |
4272 | return MATCH_ERROR; |
4273 | } | |
4274 | ||
4275 | if (gfc_get_symbol (name, NULL, &r)) | |
4276 | return MATCH_ERROR; | |
4277 | ||
726d8566 | 4278 | if (gfc_add_result (&r->attr, r->name, NULL) == FAILURE) |
6de9cd9a DN |
4279 | return MATCH_ERROR; |
4280 | ||
4281 | *result = r; | |
4282 | ||
4283 | return MATCH_YES; | |
4284 | } | |
4285 | ||
4286 | ||
a8b3b0b6 CR |
4287 | /* Match a function suffix, which could be a combination of a result |
4288 | clause and BIND(C), either one, or neither. The draft does not | |
4289 | require them to come in a specific order. */ | |
4290 | ||
4291 | match | |
4292 | gfc_match_suffix (gfc_symbol *sym, gfc_symbol **result) | |
4293 | { | |
4294 | match is_bind_c; /* Found bind(c). */ | |
4295 | match is_result; /* Found result clause. */ | |
4296 | match found_match; /* Status of whether we've found a good match. */ | |
8fc541d3 | 4297 | char peek_char; /* Character we're going to peek at. */ |
1eabf70a | 4298 | bool allow_binding_name; |
a8b3b0b6 CR |
4299 | |
4300 | /* Initialize to having found nothing. */ | |
4301 | found_match = MATCH_NO; | |
4302 | is_bind_c = MATCH_NO; | |
4303 | is_result = MATCH_NO; | |
4304 | ||
4305 | /* Get the next char to narrow between result and bind(c). */ | |
4306 | gfc_gobble_whitespace (); | |
8fc541d3 | 4307 | peek_char = gfc_peek_ascii_char (); |
a8b3b0b6 | 4308 | |
1eabf70a TB |
4309 | /* C binding names are not allowed for internal procedures. */ |
4310 | if (gfc_current_state () == COMP_CONTAINS | |
4311 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
4312 | allow_binding_name = false; | |
4313 | else | |
4314 | allow_binding_name = true; | |
4315 | ||
a8b3b0b6 CR |
4316 | switch (peek_char) |
4317 | { | |
4318 | case 'r': | |
4319 | /* Look for result clause. */ | |
4320 | is_result = match_result (sym, result); | |
4321 | if (is_result == MATCH_YES) | |
4322 | { | |
4323 | /* Now see if there is a bind(c) after it. */ | |
1eabf70a | 4324 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
a8b3b0b6 CR |
4325 | /* We've found the result clause and possibly bind(c). */ |
4326 | found_match = MATCH_YES; | |
4327 | } | |
4328 | else | |
4329 | /* This should only be MATCH_ERROR. */ | |
4330 | found_match = is_result; | |
4331 | break; | |
4332 | case 'b': | |
4333 | /* Look for bind(c) first. */ | |
1eabf70a | 4334 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
a8b3b0b6 CR |
4335 | if (is_bind_c == MATCH_YES) |
4336 | { | |
4337 | /* Now see if a result clause followed it. */ | |
4338 | is_result = match_result (sym, result); | |
4339 | found_match = MATCH_YES; | |
4340 | } | |
4341 | else | |
4342 | { | |
4343 | /* Should only be a MATCH_ERROR if we get here after seeing 'b'. */ | |
4344 | found_match = MATCH_ERROR; | |
4345 | } | |
4346 | break; | |
4347 | default: | |
4348 | gfc_error ("Unexpected junk after function declaration at %C"); | |
4349 | found_match = MATCH_ERROR; | |
4350 | break; | |
4351 | } | |
4352 | ||
a8b3b0b6 | 4353 | if (is_bind_c == MATCH_YES) |
01f4fff1 | 4354 | { |
1eabf70a | 4355 | /* Fortran 2008 draft allows BIND(C) for internal procedures. */ |
01f4fff1 | 4356 | if (gfc_current_state () == COMP_CONTAINS |
1eabf70a | 4357 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
fdc54e88 FXC |
4358 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
4359 | "at %L may not be specified for an internal " | |
4360 | "procedure", &gfc_current_locus) | |
1eabf70a TB |
4361 | == FAILURE) |
4362 | return MATCH_ERROR; | |
4363 | ||
01f4fff1 TB |
4364 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &gfc_current_locus, 1) |
4365 | == FAILURE) | |
4366 | return MATCH_ERROR; | |
4367 | } | |
a8b3b0b6 CR |
4368 | |
4369 | return found_match; | |
4370 | } | |
4371 | ||
4372 | ||
3070bab4 JW |
4373 | /* Procedure pointer return value without RESULT statement: |
4374 | Add "hidden" result variable named "ppr@". */ | |
4375 | ||
4376 | static gfc_try | |
4377 | add_hidden_procptr_result (gfc_symbol *sym) | |
4378 | { | |
4379 | bool case1,case2; | |
4380 | ||
4381 | if (gfc_notification_std (GFC_STD_F2003) == ERROR) | |
4382 | return FAILURE; | |
4383 | ||
4384 | /* First usage case: PROCEDURE and EXTERNAL statements. */ | |
4385 | case1 = gfc_current_state () == COMP_FUNCTION && gfc_current_block () | |
4386 | && strcmp (gfc_current_block ()->name, sym->name) == 0 | |
4387 | && sym->attr.external; | |
4388 | /* Second usage case: INTERFACE statements. */ | |
4389 | case2 = gfc_current_state () == COMP_INTERFACE && gfc_state_stack->previous | |
4390 | && gfc_state_stack->previous->state == COMP_FUNCTION | |
4391 | && strcmp (gfc_state_stack->previous->sym->name, sym->name) == 0; | |
4392 | ||
4393 | if (case1 || case2) | |
4394 | { | |
4395 | gfc_symtree *stree; | |
4396 | if (case1) | |
08a6b8e0 | 4397 | gfc_get_sym_tree ("ppr@", gfc_current_ns, &stree, false); |
3070bab4 | 4398 | else if (case2) |
c73b6478 JW |
4399 | { |
4400 | gfc_symtree *st2; | |
08a6b8e0 | 4401 | gfc_get_sym_tree ("ppr@", gfc_current_ns->parent, &stree, false); |
c73b6478 JW |
4402 | st2 = gfc_new_symtree (&gfc_current_ns->sym_root, "ppr@"); |
4403 | st2->n.sym = stree->n.sym; | |
4404 | } | |
3070bab4 JW |
4405 | sym->result = stree->n.sym; |
4406 | ||
4407 | sym->result->attr.proc_pointer = sym->attr.proc_pointer; | |
4408 | sym->result->attr.pointer = sym->attr.pointer; | |
4409 | sym->result->attr.external = sym->attr.external; | |
4410 | sym->result->attr.referenced = sym->attr.referenced; | |
fc9c6e5d | 4411 | sym->result->ts = sym->ts; |
3070bab4 JW |
4412 | sym->attr.proc_pointer = 0; |
4413 | sym->attr.pointer = 0; | |
4414 | sym->attr.external = 0; | |
4415 | if (sym->result->attr.external && sym->result->attr.pointer) | |
4416 | { | |
4417 | sym->result->attr.pointer = 0; | |
4418 | sym->result->attr.proc_pointer = 1; | |
4419 | } | |
4420 | ||
4421 | return gfc_add_result (&sym->result->attr, sym->result->name, NULL); | |
4422 | } | |
4423 | /* POINTER after PROCEDURE/EXTERNAL/INTERFACE statement. */ | |
4424 | else if (sym->attr.function && !sym->attr.external && sym->attr.pointer | |
4425 | && sym->result && sym->result != sym && sym->result->attr.external | |
4426 | && sym == gfc_current_ns->proc_name | |
4427 | && sym == sym->result->ns->proc_name | |
4428 | && strcmp ("ppr@", sym->result->name) == 0) | |
4429 | { | |
4430 | sym->result->attr.proc_pointer = 1; | |
4431 | sym->attr.pointer = 0; | |
4432 | return SUCCESS; | |
4433 | } | |
4434 | else | |
4435 | return FAILURE; | |
4436 | } | |
4437 | ||
4438 | ||
713485cc JW |
4439 | /* Match the interface for a PROCEDURE declaration, |
4440 | including brackets (R1212). */ | |
69773742 JW |
4441 | |
4442 | static match | |
713485cc | 4443 | match_procedure_interface (gfc_symbol **proc_if) |
69773742 JW |
4444 | { |
4445 | match m; | |
3276e0b3 | 4446 | gfc_symtree *st; |
69773742 | 4447 | locus old_loc, entry_loc; |
3276e0b3 PT |
4448 | gfc_namespace *old_ns = gfc_current_ns; |
4449 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
69773742 | 4450 | |
3276e0b3 | 4451 | old_loc = entry_loc = gfc_current_locus; |
69773742 JW |
4452 | gfc_clear_ts (¤t_ts); |
4453 | ||
4454 | if (gfc_match (" (") != MATCH_YES) | |
4455 | { | |
4456 | gfc_current_locus = entry_loc; | |
4457 | return MATCH_NO; | |
4458 | } | |
4459 | ||
4460 | /* Get the type spec. for the procedure interface. */ | |
4461 | old_loc = gfc_current_locus; | |
e74f1cc8 | 4462 | m = gfc_match_decl_type_spec (¤t_ts, 0); |
f4256439 | 4463 | gfc_gobble_whitespace (); |
8fc541d3 | 4464 | if (m == MATCH_YES || (m == MATCH_NO && gfc_peek_ascii_char () == ')')) |
69773742 JW |
4465 | goto got_ts; |
4466 | ||
4467 | if (m == MATCH_ERROR) | |
4468 | return m; | |
4469 | ||
3276e0b3 | 4470 | /* Procedure interface is itself a procedure. */ |
69773742 | 4471 | gfc_current_locus = old_loc; |
3276e0b3 | 4472 | m = gfc_match_name (name); |
69773742 | 4473 | |
3276e0b3 PT |
4474 | /* First look to see if it is already accessible in the current |
4475 | namespace because it is use associated or contained. */ | |
4476 | st = NULL; | |
4477 | if (gfc_find_sym_tree (name, NULL, 0, &st)) | |
4478 | return MATCH_ERROR; | |
4479 | ||
4480 | /* If it is still not found, then try the parent namespace, if it | |
4481 | exists and create the symbol there if it is still not found. */ | |
4482 | if (gfc_current_ns->parent) | |
4483 | gfc_current_ns = gfc_current_ns->parent; | |
4484 | if (st == NULL && gfc_get_ha_sym_tree (name, &st)) | |
4485 | return MATCH_ERROR; | |
4486 | ||
4487 | gfc_current_ns = old_ns; | |
4488 | *proc_if = st->n.sym; | |
69773742 JW |
4489 | |
4490 | /* Various interface checks. */ | |
713485cc | 4491 | if (*proc_if) |
69773742 | 4492 | { |
713485cc | 4493 | (*proc_if)->refs++; |
bb343a6c TB |
4494 | /* Resolve interface if possible. That way, attr.procedure is only set |
4495 | if it is declared by a later procedure-declaration-stmt, which is | |
4496 | invalid per C1212. */ | |
713485cc JW |
4497 | while ((*proc_if)->ts.interface) |
4498 | *proc_if = (*proc_if)->ts.interface; | |
bb343a6c | 4499 | |
713485cc | 4500 | if ((*proc_if)->generic) |
69773742 | 4501 | { |
713485cc JW |
4502 | gfc_error ("Interface '%s' at %C may not be generic", |
4503 | (*proc_if)->name); | |
69773742 JW |
4504 | return MATCH_ERROR; |
4505 | } | |
713485cc | 4506 | if ((*proc_if)->attr.proc == PROC_ST_FUNCTION) |
69773742 JW |
4507 | { |
4508 | gfc_error ("Interface '%s' at %C may not be a statement function", | |
713485cc | 4509 | (*proc_if)->name); |
69773742 JW |
4510 | return MATCH_ERROR; |
4511 | } | |
4512 | /* Handle intrinsic procedures. */ | |
713485cc JW |
4513 | if (!((*proc_if)->attr.external || (*proc_if)->attr.use_assoc |
4514 | || (*proc_if)->attr.if_source == IFSRC_IFBODY) | |
4515 | && (gfc_is_intrinsic ((*proc_if), 0, gfc_current_locus) | |
4516 | || gfc_is_intrinsic ((*proc_if), 1, gfc_current_locus))) | |
4517 | (*proc_if)->attr.intrinsic = 1; | |
4518 | if ((*proc_if)->attr.intrinsic | |
4519 | && !gfc_intrinsic_actual_ok ((*proc_if)->name, 0)) | |
69773742 JW |
4520 | { |
4521 | gfc_error ("Intrinsic procedure '%s' not allowed " | |
713485cc | 4522 | "in PROCEDURE statement at %C", (*proc_if)->name); |
69773742 JW |
4523 | return MATCH_ERROR; |
4524 | } | |
69773742 JW |
4525 | } |
4526 | ||
4527 | got_ts: | |
69773742 JW |
4528 | if (gfc_match (" )") != MATCH_YES) |
4529 | { | |
4530 | gfc_current_locus = entry_loc; | |
4531 | return MATCH_NO; | |
4532 | } | |
4533 | ||
713485cc JW |
4534 | return MATCH_YES; |
4535 | } | |
4536 | ||
4537 | ||
4538 | /* Match a PROCEDURE declaration (R1211). */ | |
4539 | ||
4540 | static match | |
4541 | match_procedure_decl (void) | |
4542 | { | |
4543 | match m; | |
4544 | gfc_symbol *sym, *proc_if = NULL; | |
4545 | int num; | |
4546 | gfc_expr *initializer = NULL; | |
4547 | ||
4548 | /* Parse interface (with brackets). */ | |
4549 | m = match_procedure_interface (&proc_if); | |
4550 | if (m != MATCH_YES) | |
4551 | return m; | |
4552 | ||
4553 | /* Parse attributes (with colons). */ | |
69773742 JW |
4554 | m = match_attr_spec(); |
4555 | if (m == MATCH_ERROR) | |
4556 | return MATCH_ERROR; | |
4557 | ||
4558 | /* Get procedure symbols. */ | |
4559 | for(num=1;;num++) | |
4560 | { | |
69773742 JW |
4561 | m = gfc_match_symbol (&sym, 0); |
4562 | if (m == MATCH_NO) | |
4563 | goto syntax; | |
4564 | else if (m == MATCH_ERROR) | |
4565 | return m; | |
4566 | ||
4567 | /* Add current_attr to the symbol attributes. */ | |
4568 | if (gfc_copy_attr (&sym->attr, ¤t_attr, NULL) == FAILURE) | |
4569 | return MATCH_ERROR; | |
4570 | ||
4571 | if (sym->attr.is_bind_c) | |
4572 | { | |
4573 | /* Check for C1218. */ | |
4574 | if (!proc_if || !proc_if->attr.is_bind_c) | |
4575 | { | |
4576 | gfc_error ("BIND(C) attribute at %C requires " | |
4577 | "an interface with BIND(C)"); | |
4578 | return MATCH_ERROR; | |
4579 | } | |
4580 | /* Check for C1217. */ | |
4581 | if (has_name_equals && sym->attr.pointer) | |
4582 | { | |
4583 | gfc_error ("BIND(C) procedure with NAME may not have " | |
4584 | "POINTER attribute at %C"); | |
4585 | return MATCH_ERROR; | |
4586 | } | |
4587 | if (has_name_equals && sym->attr.dummy) | |
4588 | { | |
4589 | gfc_error ("Dummy procedure at %C may not have " | |
4590 | "BIND(C) attribute with NAME"); | |
4591 | return MATCH_ERROR; | |
4592 | } | |
4593 | /* Set binding label for BIND(C). */ | |
4594 | if (set_binding_label (sym->binding_label, sym->name, num) != SUCCESS) | |
4595 | return MATCH_ERROR; | |
4596 | } | |
4597 | ||
8fb74da4 | 4598 | if (gfc_add_external (&sym->attr, NULL) == FAILURE) |
69773742 | 4599 | return MATCH_ERROR; |
3070bab4 JW |
4600 | |
4601 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4602 | sym = sym->result; | |
4603 | ||
69773742 JW |
4604 | if (gfc_add_proc (&sym->attr, sym->name, NULL) == FAILURE) |
4605 | return MATCH_ERROR; | |
4606 | ||
4607 | /* Set interface. */ | |
4608 | if (proc_if != NULL) | |
6cc309c9 | 4609 | { |
1d146030 JW |
4610 | if (sym->ts.type != BT_UNKNOWN) |
4611 | { | |
4612 | gfc_error ("Procedure '%s' at %L already has basic type of %s", | |
4613 | sym->name, &gfc_current_locus, | |
4614 | gfc_basic_typename (sym->ts.type)); | |
4615 | return MATCH_ERROR; | |
4616 | } | |
32d99e68 | 4617 | sym->ts.interface = proc_if; |
6cc309c9 | 4618 | sym->attr.untyped = 1; |
c73b6478 | 4619 | sym->attr.if_source = IFSRC_IFBODY; |
6cc309c9 | 4620 | } |
69773742 JW |
4621 | else if (current_ts.type != BT_UNKNOWN) |
4622 | { | |
1d146030 JW |
4623 | if (gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) |
4624 | return MATCH_ERROR; | |
32d99e68 JW |
4625 | sym->ts.interface = gfc_new_symbol ("", gfc_current_ns); |
4626 | sym->ts.interface->ts = current_ts; | |
4627 | sym->ts.interface->attr.function = 1; | |
4628 | sym->attr.function = sym->ts.interface->attr.function; | |
c73b6478 | 4629 | sym->attr.if_source = IFSRC_UNKNOWN; |
69773742 JW |
4630 | } |
4631 | ||
8fb74da4 JW |
4632 | if (gfc_match (" =>") == MATCH_YES) |
4633 | { | |
4634 | if (!current_attr.pointer) | |
4635 | { | |
4636 | gfc_error ("Initialization at %C isn't for a pointer variable"); | |
4637 | m = MATCH_ERROR; | |
4638 | goto cleanup; | |
4639 | } | |
4640 | ||
4641 | m = gfc_match_null (&initializer); | |
4642 | if (m == MATCH_NO) | |
4643 | { | |
4644 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4645 | m = MATCH_ERROR; | |
4646 | } | |
4647 | ||
4648 | if (gfc_pure (NULL)) | |
4649 | { | |
4650 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4651 | "a PURE procedure"); | |
4652 | m = MATCH_ERROR; | |
4653 | } | |
4654 | ||
4655 | if (m != MATCH_YES) | |
4656 | goto cleanup; | |
4657 | ||
4658 | if (add_init_expr_to_sym (sym->name, &initializer, &gfc_current_locus) | |
4659 | != SUCCESS) | |
4660 | goto cleanup; | |
4661 | ||
4662 | } | |
4663 | ||
4664 | gfc_set_sym_referenced (sym); | |
4665 | ||
69773742 JW |
4666 | if (gfc_match_eos () == MATCH_YES) |
4667 | return MATCH_YES; | |
4668 | if (gfc_match_char (',') != MATCH_YES) | |
4669 | goto syntax; | |
4670 | } | |
4671 | ||
4672 | syntax: | |
4673 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4674 | return MATCH_ERROR; | |
8fb74da4 JW |
4675 | |
4676 | cleanup: | |
4677 | /* Free stuff up and return. */ | |
4678 | gfc_free_expr (initializer); | |
4679 | return m; | |
69773742 JW |
4680 | } |
4681 | ||
4682 | ||
713485cc JW |
4683 | static match |
4684 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc); | |
4685 | ||
4686 | ||
4687 | /* Match a procedure pointer component declaration (R445). */ | |
4688 | ||
4689 | static match | |
4690 | match_ppc_decl (void) | |
4691 | { | |
4692 | match m; | |
4693 | gfc_symbol *proc_if = NULL; | |
4694 | gfc_typespec ts; | |
4695 | int num; | |
4696 | gfc_component *c; | |
4697 | gfc_expr *initializer = NULL; | |
4698 | gfc_typebound_proc* tb; | |
4699 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4700 | ||
4701 | /* Parse interface (with brackets). */ | |
4702 | m = match_procedure_interface (&proc_if); | |
4703 | if (m != MATCH_YES) | |
4704 | goto syntax; | |
4705 | ||
4706 | /* Parse attributes. */ | |
4707 | tb = XCNEW (gfc_typebound_proc); | |
4708 | tb->where = gfc_current_locus; | |
4709 | m = match_binding_attributes (tb, false, true); | |
4710 | if (m == MATCH_ERROR) | |
4711 | return m; | |
4712 | ||
713485cc JW |
4713 | gfc_clear_attr (¤t_attr); |
4714 | current_attr.procedure = 1; | |
4715 | current_attr.proc_pointer = 1; | |
4716 | current_attr.access = tb->access; | |
4717 | current_attr.flavor = FL_PROCEDURE; | |
4718 | ||
4719 | /* Match the colons (required). */ | |
4720 | if (gfc_match (" ::") != MATCH_YES) | |
4721 | { | |
4722 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
4723 | return MATCH_ERROR; | |
4724 | } | |
4725 | ||
4726 | /* Check for C450. */ | |
4727 | if (!tb->nopass && proc_if == NULL) | |
4728 | { | |
4729 | gfc_error("NOPASS or explicit interface required at %C"); | |
4730 | return MATCH_ERROR; | |
4731 | } | |
4732 | ||
3212c187 SK |
4733 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Procedure pointer " |
4734 | "component at %C") == FAILURE) | |
4735 | return MATCH_ERROR; | |
4736 | ||
713485cc JW |
4737 | /* Match PPC names. */ |
4738 | ts = current_ts; | |
4739 | for(num=1;;num++) | |
4740 | { | |
4741 | m = gfc_match_name (name); | |
4742 | if (m == MATCH_NO) | |
4743 | goto syntax; | |
4744 | else if (m == MATCH_ERROR) | |
4745 | return m; | |
4746 | ||
4747 | if (gfc_add_component (gfc_current_block (), name, &c) == FAILURE) | |
4748 | return MATCH_ERROR; | |
4749 | ||
4750 | /* Add current_attr to the symbol attributes. */ | |
4751 | if (gfc_copy_attr (&c->attr, ¤t_attr, NULL) == FAILURE) | |
4752 | return MATCH_ERROR; | |
4753 | ||
4754 | if (gfc_add_external (&c->attr, NULL) == FAILURE) | |
4755 | return MATCH_ERROR; | |
4756 | ||
4757 | if (gfc_add_proc (&c->attr, name, NULL) == FAILURE) | |
4758 | return MATCH_ERROR; | |
4759 | ||
90661f26 JW |
4760 | c->tb = tb; |
4761 | ||
713485cc JW |
4762 | /* Set interface. */ |
4763 | if (proc_if != NULL) | |
4764 | { | |
4765 | c->ts.interface = proc_if; | |
4766 | c->attr.untyped = 1; | |
4767 | c->attr.if_source = IFSRC_IFBODY; | |
4768 | } | |
4769 | else if (ts.type != BT_UNKNOWN) | |
4770 | { | |
4771 | c->ts = ts; | |
4772 | c->ts.interface = gfc_new_symbol ("", gfc_current_ns); | |
4773 | c->ts.interface->ts = ts; | |
4774 | c->ts.interface->attr.function = 1; | |
4775 | c->attr.function = c->ts.interface->attr.function; | |
4776 | c->attr.if_source = IFSRC_UNKNOWN; | |
4777 | } | |
4778 | ||
4779 | if (gfc_match (" =>") == MATCH_YES) | |
4780 | { | |
4781 | m = gfc_match_null (&initializer); | |
4782 | if (m == MATCH_NO) | |
4783 | { | |
4784 | gfc_error ("Pointer initialization requires a NULL() at %C"); | |
4785 | m = MATCH_ERROR; | |
4786 | } | |
4787 | if (gfc_pure (NULL)) | |
4788 | { | |
4789 | gfc_error ("Initialization of pointer at %C is not allowed in " | |
4790 | "a PURE procedure"); | |
4791 | m = MATCH_ERROR; | |
4792 | } | |
4793 | if (m != MATCH_YES) | |
4794 | { | |
4795 | gfc_free_expr (initializer); | |
4796 | return m; | |
4797 | } | |
4798 | c->initializer = initializer; | |
4799 | } | |
4800 | ||
4801 | if (gfc_match_eos () == MATCH_YES) | |
4802 | return MATCH_YES; | |
4803 | if (gfc_match_char (',') != MATCH_YES) | |
4804 | goto syntax; | |
4805 | } | |
4806 | ||
4807 | syntax: | |
4808 | gfc_error ("Syntax error in procedure pointer component at %C"); | |
4809 | return MATCH_ERROR; | |
4810 | } | |
4811 | ||
4812 | ||
69773742 JW |
4813 | /* Match a PROCEDURE declaration inside an interface (R1206). */ |
4814 | ||
4815 | static match | |
4816 | match_procedure_in_interface (void) | |
4817 | { | |
4818 | match m; | |
4819 | gfc_symbol *sym; | |
4820 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4821 | ||
4822 | if (current_interface.type == INTERFACE_NAMELESS | |
4823 | || current_interface.type == INTERFACE_ABSTRACT) | |
4824 | { | |
4825 | gfc_error ("PROCEDURE at %C must be in a generic interface"); | |
4826 | return MATCH_ERROR; | |
4827 | } | |
4828 | ||
4829 | for(;;) | |
4830 | { | |
4831 | m = gfc_match_name (name); | |
4832 | if (m == MATCH_NO) | |
4833 | goto syntax; | |
4834 | else if (m == MATCH_ERROR) | |
4835 | return m; | |
4836 | if (gfc_get_symbol (name, gfc_current_ns->parent, &sym)) | |
4837 | return MATCH_ERROR; | |
4838 | ||
4839 | if (gfc_add_interface (sym) == FAILURE) | |
4840 | return MATCH_ERROR; | |
4841 | ||
69773742 JW |
4842 | if (gfc_match_eos () == MATCH_YES) |
4843 | break; | |
4844 | if (gfc_match_char (',') != MATCH_YES) | |
4845 | goto syntax; | |
4846 | } | |
4847 | ||
4848 | return MATCH_YES; | |
4849 | ||
4850 | syntax: | |
4851 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
4852 | return MATCH_ERROR; | |
4853 | } | |
4854 | ||
4855 | ||
4856 | /* General matcher for PROCEDURE declarations. */ | |
4857 | ||
30b608eb DK |
4858 | static match match_procedure_in_type (void); |
4859 | ||
69773742 JW |
4860 | match |
4861 | gfc_match_procedure (void) | |
4862 | { | |
4863 | match m; | |
4864 | ||
4865 | switch (gfc_current_state ()) | |
4866 | { | |
4867 | case COMP_NONE: | |
4868 | case COMP_PROGRAM: | |
4869 | case COMP_MODULE: | |
4870 | case COMP_SUBROUTINE: | |
4871 | case COMP_FUNCTION: | |
4872 | m = match_procedure_decl (); | |
4873 | break; | |
4874 | case COMP_INTERFACE: | |
4875 | m = match_procedure_in_interface (); | |
4876 | break; | |
4877 | case COMP_DERIVED: | |
713485cc JW |
4878 | m = match_ppc_decl (); |
4879 | break; | |
30b608eb DK |
4880 | case COMP_DERIVED_CONTAINS: |
4881 | m = match_procedure_in_type (); | |
4882 | break; | |
69773742 JW |
4883 | default: |
4884 | return MATCH_NO; | |
4885 | } | |
4886 | ||
4887 | if (m != MATCH_YES) | |
4888 | return m; | |
4889 | ||
4890 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROCEDURE statement at %C") | |
4891 | == FAILURE) | |
4892 | return MATCH_ERROR; | |
4893 | ||
4894 | return m; | |
4895 | } | |
4896 | ||
4897 | ||
c3005b0f DK |
4898 | /* Warn if a matched procedure has the same name as an intrinsic; this is |
4899 | simply a wrapper around gfc_warn_intrinsic_shadow that interprets the current | |
4900 | parser-state-stack to find out whether we're in a module. */ | |
4901 | ||
4902 | static void | |
4903 | warn_intrinsic_shadow (const gfc_symbol* sym, bool func) | |
4904 | { | |
4905 | bool in_module; | |
4906 | ||
4907 | in_module = (gfc_state_stack->previous | |
4908 | && gfc_state_stack->previous->state == COMP_MODULE); | |
4909 | ||
4910 | gfc_warn_intrinsic_shadow (sym, in_module, func); | |
4911 | } | |
4912 | ||
4913 | ||
6de9cd9a DN |
4914 | /* Match a function declaration. */ |
4915 | ||
4916 | match | |
4917 | gfc_match_function_decl (void) | |
4918 | { | |
4919 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4920 | gfc_symbol *sym, *result; | |
4921 | locus old_loc; | |
4922 | match m; | |
a8b3b0b6 CR |
4923 | match suffix_match; |
4924 | match found_match; /* Status returned by match func. */ | |
6de9cd9a DN |
4925 | |
4926 | if (gfc_current_state () != COMP_NONE | |
4927 | && gfc_current_state () != COMP_INTERFACE | |
4928 | && gfc_current_state () != COMP_CONTAINS) | |
4929 | return MATCH_NO; | |
4930 | ||
4931 | gfc_clear_ts (¤t_ts); | |
4932 | ||
63645982 | 4933 | old_loc = gfc_current_locus; |
6de9cd9a | 4934 | |
1c8bcdf7 | 4935 | m = gfc_match_prefix (¤t_ts); |
6de9cd9a DN |
4936 | if (m != MATCH_YES) |
4937 | { | |
63645982 | 4938 | gfc_current_locus = old_loc; |
6de9cd9a DN |
4939 | return m; |
4940 | } | |
4941 | ||
4942 | if (gfc_match ("function% %n", name) != MATCH_YES) | |
4943 | { | |
63645982 | 4944 | gfc_current_locus = old_loc; |
6de9cd9a DN |
4945 | return MATCH_NO; |
4946 | } | |
1a492601 | 4947 | if (get_proc_name (name, &sym, false)) |
6de9cd9a | 4948 | return MATCH_ERROR; |
3070bab4 JW |
4949 | |
4950 | if (add_hidden_procptr_result (sym) == SUCCESS) | |
4951 | sym = sym->result; | |
4952 | ||
6de9cd9a DN |
4953 | gfc_new_block = sym; |
4954 | ||
4955 | m = gfc_match_formal_arglist (sym, 0, 0); | |
4956 | if (m == MATCH_NO) | |
2b9a33ae TS |
4957 | { |
4958 | gfc_error ("Expected formal argument list in function " | |
636dff67 | 4959 | "definition at %C"); |
2b9a33ae TS |
4960 | m = MATCH_ERROR; |
4961 | goto cleanup; | |
4962 | } | |
6de9cd9a DN |
4963 | else if (m == MATCH_ERROR) |
4964 | goto cleanup; | |
4965 | ||
4966 | result = NULL; | |
4967 | ||
a8b3b0b6 CR |
4968 | /* According to the draft, the bind(c) and result clause can |
4969 | come in either order after the formal_arg_list (i.e., either | |
4970 | can be first, both can exist together or by themselves or neither | |
4971 | one). Therefore, the match_result can't match the end of the | |
4972 | string, and check for the bind(c) or result clause in either order. */ | |
4973 | found_match = gfc_match_eos (); | |
4974 | ||
4975 | /* Make sure that it isn't already declared as BIND(C). If it is, it | |
4976 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
4977 | not allowed for procedures. */ | |
4978 | if (sym->attr.is_bind_c == 1) | |
4979 | { | |
4980 | sym->attr.is_bind_c = 0; | |
4981 | if (sym->old_symbol != NULL) | |
4982 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4983 | "variables or common blocks", | |
4984 | &(sym->old_symbol->declared_at)); | |
4985 | else | |
4986 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
4987 | "variables or common blocks", &gfc_current_locus); | |
6de9cd9a DN |
4988 | } |
4989 | ||
a8b3b0b6 | 4990 | if (found_match != MATCH_YES) |
6de9cd9a | 4991 | { |
a8b3b0b6 CR |
4992 | /* If we haven't found the end-of-statement, look for a suffix. */ |
4993 | suffix_match = gfc_match_suffix (sym, &result); | |
4994 | if (suffix_match == MATCH_YES) | |
4995 | /* Need to get the eos now. */ | |
4996 | found_match = gfc_match_eos (); | |
4997 | else | |
4998 | found_match = suffix_match; | |
6de9cd9a DN |
4999 | } |
5000 | ||
a8b3b0b6 CR |
5001 | if(found_match != MATCH_YES) |
5002 | m = MATCH_ERROR; | |
6de9cd9a DN |
5003 | else |
5004 | { | |
a8b3b0b6 CR |
5005 | /* Make changes to the symbol. */ |
5006 | m = MATCH_ERROR; | |
5007 | ||
5008 | if (gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) | |
5009 | goto cleanup; | |
5010 | ||
5011 | if (gfc_missing_attr (&sym->attr, NULL) == FAILURE | |
5012 | || copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
5013 | goto cleanup; | |
6de9cd9a | 5014 | |
a99d95a2 | 5015 | /* Delay matching the function characteristics until after the |
1c8bcdf7 | 5016 | specification block by signalling kind=-1. */ |
a99d95a2 PT |
5017 | sym->declared_at = old_loc; |
5018 | if (current_ts.type != BT_UNKNOWN) | |
5019 | current_ts.kind = -1; | |
5020 | else | |
5021 | current_ts.kind = 0; | |
1c8bcdf7 | 5022 | |
a8b3b0b6 CR |
5023 | if (result == NULL) |
5024 | { | |
6de7294f JW |
5025 | if (current_ts.type != BT_UNKNOWN |
5026 | && gfc_add_type (sym, ¤t_ts, &gfc_current_locus) == FAILURE) | |
5027 | goto cleanup; | |
a8b3b0b6 CR |
5028 | sym->result = sym; |
5029 | } | |
5030 | else | |
5031 | { | |
6de7294f JW |
5032 | if (current_ts.type != BT_UNKNOWN |
5033 | && gfc_add_type (result, ¤t_ts, &gfc_current_locus) | |
5034 | == FAILURE) | |
5035 | goto cleanup; | |
a8b3b0b6 CR |
5036 | sym->result = result; |
5037 | } | |
5038 | ||
c3005b0f DK |
5039 | /* Warn if this procedure has the same name as an intrinsic. */ |
5040 | warn_intrinsic_shadow (sym, true); | |
5041 | ||
a8b3b0b6 CR |
5042 | return MATCH_YES; |
5043 | } | |
6de9cd9a DN |
5044 | |
5045 | cleanup: | |
63645982 | 5046 | gfc_current_locus = old_loc; |
6de9cd9a DN |
5047 | return m; |
5048 | } | |
5049 | ||
636dff67 SK |
5050 | |
5051 | /* This is mostly a copy of parse.c(add_global_procedure) but modified to | |
5052 | pass the name of the entry, rather than the gfc_current_block name, and | |
5053 | to return false upon finding an existing global entry. */ | |
68ea355b PT |
5054 | |
5055 | static bool | |
636dff67 | 5056 | add_global_entry (const char *name, int sub) |
68ea355b PT |
5057 | { |
5058 | gfc_gsymbol *s; | |
32e8bb8e | 5059 | enum gfc_symbol_type type; |
68ea355b PT |
5060 | |
5061 | s = gfc_get_gsymbol(name); | |
7389bce6 | 5062 | type = sub ? GSYM_SUBROUTINE : GSYM_FUNCTION; |
68ea355b PT |
5063 | |
5064 | if (s->defined | |
636dff67 | 5065 | || (s->type != GSYM_UNKNOWN |
7389bce6 | 5066 | && s->type != type)) |
ca39e6f2 | 5067 | gfc_global_used(s, NULL); |
68ea355b PT |
5068 | else |
5069 | { | |
7389bce6 | 5070 | s->type = type; |
68ea355b PT |
5071 | s->where = gfc_current_locus; |
5072 | s->defined = 1; | |
71a7778c | 5073 | s->ns = gfc_current_ns; |
68ea355b PT |
5074 | return true; |
5075 | } | |
5076 | return false; | |
5077 | } | |
6de9cd9a | 5078 | |
636dff67 | 5079 | |
6de9cd9a DN |
5080 | /* Match an ENTRY statement. */ |
5081 | ||
5082 | match | |
5083 | gfc_match_entry (void) | |
5084 | { | |
3d79abbd PB |
5085 | gfc_symbol *proc; |
5086 | gfc_symbol *result; | |
5087 | gfc_symbol *entry; | |
6de9cd9a DN |
5088 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
5089 | gfc_compile_state state; | |
5090 | match m; | |
3d79abbd | 5091 | gfc_entry_list *el; |
c96cfa49 | 5092 | locus old_loc; |
1a492601 | 5093 | bool module_procedure; |
bc3e7a8c TB |
5094 | char peek_char; |
5095 | match is_bind_c; | |
6de9cd9a DN |
5096 | |
5097 | m = gfc_match_name (name); | |
5098 | if (m != MATCH_YES) | |
5099 | return m; | |
5100 | ||
58fc89f6 TB |
5101 | if (gfc_notify_std (GFC_STD_F2008_OBS, "Fortran 2008 obsolescent feature: " |
5102 | "ENTRY statement at %C") == FAILURE) | |
5103 | return MATCH_ERROR; | |
5104 | ||
3d79abbd | 5105 | state = gfc_current_state (); |
4c93c95a | 5106 | if (state != COMP_SUBROUTINE && state != COMP_FUNCTION) |
3d79abbd | 5107 | { |
4c93c95a FXC |
5108 | switch (state) |
5109 | { | |
5110 | case COMP_PROGRAM: | |
5111 | gfc_error ("ENTRY statement at %C cannot appear within a PROGRAM"); | |
5112 | break; | |
5113 | case COMP_MODULE: | |
5114 | gfc_error ("ENTRY statement at %C cannot appear within a MODULE"); | |
5115 | break; | |
5116 | case COMP_BLOCK_DATA: | |
636dff67 SK |
5117 | gfc_error ("ENTRY statement at %C cannot appear within " |
5118 | "a BLOCK DATA"); | |
4c93c95a FXC |
5119 | break; |
5120 | case COMP_INTERFACE: | |
636dff67 SK |
5121 | gfc_error ("ENTRY statement at %C cannot appear within " |
5122 | "an INTERFACE"); | |
4c93c95a FXC |
5123 | break; |
5124 | case COMP_DERIVED: | |
636dff67 SK |
5125 | gfc_error ("ENTRY statement at %C cannot appear within " |
5126 | "a DERIVED TYPE block"); | |
4c93c95a FXC |
5127 | break; |
5128 | case COMP_IF: | |
636dff67 SK |
5129 | gfc_error ("ENTRY statement at %C cannot appear within " |
5130 | "an IF-THEN block"); | |
4c93c95a FXC |
5131 | break; |
5132 | case COMP_DO: | |
636dff67 SK |
5133 | gfc_error ("ENTRY statement at %C cannot appear within " |
5134 | "a DO block"); | |
4c93c95a FXC |
5135 | break; |
5136 | case COMP_SELECT: | |
636dff67 SK |
5137 | gfc_error ("ENTRY statement at %C cannot appear within " |
5138 | "a SELECT block"); | |
4c93c95a FXC |
5139 | break; |
5140 | case COMP_FORALL: | |
636dff67 SK |
5141 | gfc_error ("ENTRY statement at %C cannot appear within " |
5142 | "a FORALL block"); | |
4c93c95a FXC |
5143 | break; |
5144 | case COMP_WHERE: | |
636dff67 SK |
5145 | gfc_error ("ENTRY statement at %C cannot appear within " |
5146 | "a WHERE block"); | |
4c93c95a FXC |
5147 | break; |
5148 | case COMP_CONTAINS: | |
636dff67 SK |
5149 | gfc_error ("ENTRY statement at %C cannot appear within " |
5150 | "a contained subprogram"); | |
4c93c95a FXC |
5151 | break; |
5152 | default: | |
5153 | gfc_internal_error ("gfc_match_entry(): Bad state"); | |
5154 | } | |
3d79abbd PB |
5155 | return MATCH_ERROR; |
5156 | } | |
5157 | ||
1a492601 | 5158 | module_procedure = gfc_current_ns->parent != NULL |
636dff67 SK |
5159 | && gfc_current_ns->parent->proc_name |
5160 | && gfc_current_ns->parent->proc_name->attr.flavor | |
5161 | == FL_MODULE; | |
1a492601 | 5162 | |
3d79abbd PB |
5163 | if (gfc_current_ns->parent != NULL |
5164 | && gfc_current_ns->parent->proc_name | |
1a492601 | 5165 | && !module_procedure) |
3d79abbd PB |
5166 | { |
5167 | gfc_error("ENTRY statement at %C cannot appear in a " | |
5168 | "contained procedure"); | |
5169 | return MATCH_ERROR; | |
5170 | } | |
5171 | ||
1a492601 PT |
5172 | /* Module function entries need special care in get_proc_name |
5173 | because previous references within the function will have | |
5174 | created symbols attached to the current namespace. */ | |
5175 | if (get_proc_name (name, &entry, | |
5176 | gfc_current_ns->parent != NULL | |
ecd3b73c | 5177 | && module_procedure)) |
6de9cd9a DN |
5178 | return MATCH_ERROR; |
5179 | ||
3d79abbd PB |
5180 | proc = gfc_current_block (); |
5181 | ||
bc3e7a8c TB |
5182 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
5183 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
5184 | not allowed for procedures. */ | |
5185 | if (entry->attr.is_bind_c == 1) | |
5186 | { | |
5187 | entry->attr.is_bind_c = 0; | |
5188 | if (entry->old_symbol != NULL) | |
5189 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5190 | "variables or common blocks", | |
5191 | &(entry->old_symbol->declared_at)); | |
5192 | else | |
5193 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5194 | "variables or common blocks", &gfc_current_locus); | |
5195 | } | |
5196 | ||
5197 | /* Check what next non-whitespace character is so we can tell if there | |
5198 | is the required parens if we have a BIND(C). */ | |
5199 | gfc_gobble_whitespace (); | |
8fc541d3 | 5200 | peek_char = gfc_peek_ascii_char (); |
bc3e7a8c | 5201 | |
3d79abbd | 5202 | if (state == COMP_SUBROUTINE) |
6de9cd9a | 5203 | { |
231b2fcc | 5204 | /* An entry in a subroutine. */ |
182393f4 | 5205 | if (!gfc_current_ns->parent && !add_global_entry (name, 1)) |
68ea355b PT |
5206 | return MATCH_ERROR; |
5207 | ||
6de9cd9a DN |
5208 | m = gfc_match_formal_arglist (entry, 0, 1); |
5209 | if (m != MATCH_YES) | |
5210 | return MATCH_ERROR; | |
5211 | ||
1eabf70a TB |
5212 | /* Call gfc_match_bind_c with allow_binding_name = true as ENTRY can |
5213 | never be an internal procedure. */ | |
5214 | is_bind_c = gfc_match_bind_c (entry, true); | |
bc3e7a8c TB |
5215 | if (is_bind_c == MATCH_ERROR) |
5216 | return MATCH_ERROR; | |
5217 | if (is_bind_c == MATCH_YES) | |
5218 | { | |
5219 | if (peek_char != '(') | |
5220 | { | |
5221 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
5222 | return MATCH_ERROR; | |
5223 | } | |
5224 | if (gfc_add_is_bind_c (&(entry->attr), entry->name, &(entry->declared_at), 1) | |
5225 | == FAILURE) | |
5226 | return MATCH_ERROR; | |
5227 | } | |
5228 | ||
231b2fcc TS |
5229 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
5230 | || gfc_add_subroutine (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a | 5231 | return MATCH_ERROR; |
3d79abbd PB |
5232 | } |
5233 | else | |
5234 | { | |
c96cfa49 | 5235 | /* An entry in a function. |
636dff67 SK |
5236 | We need to take special care because writing |
5237 | ENTRY f() | |
5238 | as | |
5239 | ENTRY f | |
5240 | is allowed, whereas | |
5241 | ENTRY f() RESULT (r) | |
5242 | can't be written as | |
5243 | ENTRY f RESULT (r). */ | |
182393f4 | 5244 | if (!gfc_current_ns->parent && !add_global_entry (name, 0)) |
68ea355b PT |
5245 | return MATCH_ERROR; |
5246 | ||
c96cfa49 TS |
5247 | old_loc = gfc_current_locus; |
5248 | if (gfc_match_eos () == MATCH_YES) | |
5249 | { | |
5250 | gfc_current_locus = old_loc; | |
5251 | /* Match the empty argument list, and add the interface to | |
5252 | the symbol. */ | |
5253 | m = gfc_match_formal_arglist (entry, 0, 1); | |
5254 | } | |
5255 | else | |
5256 | m = gfc_match_formal_arglist (entry, 0, 0); | |
5257 | ||
6de9cd9a DN |
5258 | if (m != MATCH_YES) |
5259 | return MATCH_ERROR; | |
5260 | ||
6de9cd9a DN |
5261 | result = NULL; |
5262 | ||
5263 | if (gfc_match_eos () == MATCH_YES) | |
5264 | { | |
231b2fcc TS |
5265 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE |
5266 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
6de9cd9a DN |
5267 | return MATCH_ERROR; |
5268 | ||
d198b59a | 5269 | entry->result = entry; |
6de9cd9a DN |
5270 | } |
5271 | else | |
5272 | { | |
bc3e7a8c | 5273 | m = gfc_match_suffix (entry, &result); |
6de9cd9a DN |
5274 | if (m == MATCH_NO) |
5275 | gfc_syntax_error (ST_ENTRY); | |
5276 | if (m != MATCH_YES) | |
5277 | return MATCH_ERROR; | |
5278 | ||
bc3e7a8c TB |
5279 | if (result) |
5280 | { | |
5281 | if (gfc_add_result (&result->attr, result->name, NULL) == FAILURE | |
5282 | || gfc_add_entry (&entry->attr, result->name, NULL) == FAILURE | |
5283 | || gfc_add_function (&entry->attr, result->name, NULL) | |
5284 | == FAILURE) | |
5285 | return MATCH_ERROR; | |
5286 | entry->result = result; | |
5287 | } | |
5288 | else | |
5289 | { | |
5290 | if (gfc_add_entry (&entry->attr, entry->name, NULL) == FAILURE | |
5291 | || gfc_add_function (&entry->attr, entry->name, NULL) == FAILURE) | |
5292 | return MATCH_ERROR; | |
5293 | entry->result = entry; | |
5294 | } | |
6de9cd9a | 5295 | } |
6de9cd9a DN |
5296 | } |
5297 | ||
5298 | if (gfc_match_eos () != MATCH_YES) | |
5299 | { | |
5300 | gfc_syntax_error (ST_ENTRY); | |
5301 | return MATCH_ERROR; | |
5302 | } | |
5303 | ||
3d79abbd PB |
5304 | entry->attr.recursive = proc->attr.recursive; |
5305 | entry->attr.elemental = proc->attr.elemental; | |
5306 | entry->attr.pure = proc->attr.pure; | |
6de9cd9a | 5307 | |
3d79abbd PB |
5308 | el = gfc_get_entry_list (); |
5309 | el->sym = entry; | |
5310 | el->next = gfc_current_ns->entries; | |
5311 | gfc_current_ns->entries = el; | |
5312 | if (el->next) | |
5313 | el->id = el->next->id + 1; | |
5314 | else | |
5315 | el->id = 1; | |
6de9cd9a | 5316 | |
3d79abbd PB |
5317 | new_st.op = EXEC_ENTRY; |
5318 | new_st.ext.entry = el; | |
5319 | ||
5320 | return MATCH_YES; | |
6de9cd9a DN |
5321 | } |
5322 | ||
5323 | ||
5324 | /* Match a subroutine statement, including optional prefixes. */ | |
5325 | ||
5326 | match | |
5327 | gfc_match_subroutine (void) | |
5328 | { | |
5329 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5330 | gfc_symbol *sym; | |
5331 | match m; | |
a8b3b0b6 CR |
5332 | match is_bind_c; |
5333 | char peek_char; | |
1eabf70a | 5334 | bool allow_binding_name; |
6de9cd9a DN |
5335 | |
5336 | if (gfc_current_state () != COMP_NONE | |
5337 | && gfc_current_state () != COMP_INTERFACE | |
5338 | && gfc_current_state () != COMP_CONTAINS) | |
5339 | return MATCH_NO; | |
5340 | ||
1c8bcdf7 | 5341 | m = gfc_match_prefix (NULL); |
6de9cd9a DN |
5342 | if (m != MATCH_YES) |
5343 | return m; | |
5344 | ||
5345 | m = gfc_match ("subroutine% %n", name); | |
5346 | if (m != MATCH_YES) | |
5347 | return m; | |
5348 | ||
1a492601 | 5349 | if (get_proc_name (name, &sym, false)) |
6de9cd9a | 5350 | return MATCH_ERROR; |
3070bab4 | 5351 | |
7fcd5ad5 TB |
5352 | /* Set declared_at as it might point to, e.g., a PUBLIC statement, if |
5353 | the symbol existed before. */ | |
5354 | sym->declared_at = gfc_current_locus; | |
5355 | ||
3070bab4 JW |
5356 | if (add_hidden_procptr_result (sym) == SUCCESS) |
5357 | sym = sym->result; | |
5358 | ||
6de9cd9a DN |
5359 | gfc_new_block = sym; |
5360 | ||
a8b3b0b6 | 5361 | /* Check what next non-whitespace character is so we can tell if there |
bc3e7a8c | 5362 | is the required parens if we have a BIND(C). */ |
a8b3b0b6 | 5363 | gfc_gobble_whitespace (); |
8fc541d3 | 5364 | peek_char = gfc_peek_ascii_char (); |
a8b3b0b6 | 5365 | |
231b2fcc | 5366 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
5367 | return MATCH_ERROR; |
5368 | ||
5369 | if (gfc_match_formal_arglist (sym, 0, 1) != MATCH_YES) | |
5370 | return MATCH_ERROR; | |
5371 | ||
a8b3b0b6 CR |
5372 | /* Make sure that it isn't already declared as BIND(C). If it is, it |
5373 | must have been marked BIND(C) with a BIND(C) attribute and that is | |
5374 | not allowed for procedures. */ | |
5375 | if (sym->attr.is_bind_c == 1) | |
5376 | { | |
5377 | sym->attr.is_bind_c = 0; | |
5378 | if (sym->old_symbol != NULL) | |
5379 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5380 | "variables or common blocks", | |
5381 | &(sym->old_symbol->declared_at)); | |
5382 | else | |
5383 | gfc_error_now ("BIND(C) attribute at %L can only be used for " | |
5384 | "variables or common blocks", &gfc_current_locus); | |
5385 | } | |
1eabf70a TB |
5386 | |
5387 | /* C binding names are not allowed for internal procedures. */ | |
5388 | if (gfc_current_state () == COMP_CONTAINS | |
5389 | && sym->ns->proc_name->attr.flavor != FL_MODULE) | |
5390 | allow_binding_name = false; | |
5391 | else | |
5392 | allow_binding_name = true; | |
5393 | ||
a8b3b0b6 CR |
5394 | /* Here, we are just checking if it has the bind(c) attribute, and if |
5395 | so, then we need to make sure it's all correct. If it doesn't, | |
5396 | we still need to continue matching the rest of the subroutine line. */ | |
1eabf70a | 5397 | is_bind_c = gfc_match_bind_c (sym, allow_binding_name); |
a8b3b0b6 CR |
5398 | if (is_bind_c == MATCH_ERROR) |
5399 | { | |
5400 | /* There was an attempt at the bind(c), but it was wrong. An | |
5401 | error message should have been printed w/in the gfc_match_bind_c | |
5402 | so here we'll just return the MATCH_ERROR. */ | |
5403 | return MATCH_ERROR; | |
5404 | } | |
5405 | ||
5406 | if (is_bind_c == MATCH_YES) | |
5407 | { | |
1eabf70a | 5408 | /* The following is allowed in the Fortran 2008 draft. */ |
01f4fff1 | 5409 | if (gfc_current_state () == COMP_CONTAINS |
1eabf70a | 5410 | && sym->ns->proc_name->attr.flavor != FL_MODULE |
fdc54e88 FXC |
5411 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: BIND(C) attribute " |
5412 | "at %L may not be specified for an internal " | |
5413 | "procedure", &gfc_current_locus) | |
1eabf70a TB |
5414 | == FAILURE) |
5415 | return MATCH_ERROR; | |
5416 | ||
a8b3b0b6 CR |
5417 | if (peek_char != '(') |
5418 | { | |
5419 | gfc_error ("Missing required parentheses before BIND(C) at %C"); | |
5420 | return MATCH_ERROR; | |
5421 | } | |
5422 | if (gfc_add_is_bind_c (&(sym->attr), sym->name, &(sym->declared_at), 1) | |
5423 | == FAILURE) | |
5424 | return MATCH_ERROR; | |
5425 | } | |
5426 | ||
6de9cd9a DN |
5427 | if (gfc_match_eos () != MATCH_YES) |
5428 | { | |
5429 | gfc_syntax_error (ST_SUBROUTINE); | |
5430 | return MATCH_ERROR; | |
5431 | } | |
5432 | ||
5433 | if (copy_prefix (&sym->attr, &sym->declared_at) == FAILURE) | |
5434 | return MATCH_ERROR; | |
5435 | ||
c3005b0f DK |
5436 | /* Warn if it has the same name as an intrinsic. */ |
5437 | warn_intrinsic_shadow (sym, false); | |
5438 | ||
6de9cd9a DN |
5439 | return MATCH_YES; |
5440 | } | |
5441 | ||
5442 | ||
a8b3b0b6 CR |
5443 | /* Match a BIND(C) specifier, with the optional 'name=' specifier if |
5444 | given, and set the binding label in either the given symbol (if not | |
86bf520d | 5445 | NULL), or in the current_ts. The symbol may be NULL because we may |
a8b3b0b6 CR |
5446 | encounter the BIND(C) before the declaration itself. Return |
5447 | MATCH_NO if what we're looking at isn't a BIND(C) specifier, | |
5448 | MATCH_ERROR if it is a BIND(C) clause but an error was encountered, | |
5449 | or MATCH_YES if the specifier was correct and the binding label and | |
5450 | bind(c) fields were set correctly for the given symbol or the | |
1eabf70a TB |
5451 | current_ts. If allow_binding_name is false, no binding name may be |
5452 | given. */ | |
a8b3b0b6 CR |
5453 | |
5454 | match | |
1eabf70a | 5455 | gfc_match_bind_c (gfc_symbol *sym, bool allow_binding_name) |
a8b3b0b6 CR |
5456 | { |
5457 | /* binding label, if exists */ | |
5458 | char binding_label[GFC_MAX_SYMBOL_LEN + 1]; | |
5459 | match double_quote; | |
5460 | match single_quote; | |
a8b3b0b6 CR |
5461 | |
5462 | /* Initialize the flag that specifies whether we encountered a NAME= | |
5463 | specifier or not. */ | |
5464 | has_name_equals = 0; | |
5465 | ||
5466 | /* Init the first char to nil so we can catch if we don't have | |
5467 | the label (name attr) or the symbol name yet. */ | |
5468 | binding_label[0] = '\0'; | |
5469 | ||
5470 | /* This much we have to be able to match, in this order, if | |
5471 | there is a bind(c) label. */ | |
5472 | if (gfc_match (" bind ( c ") != MATCH_YES) | |
5473 | return MATCH_NO; | |
5474 | ||
5475 | /* Now see if there is a binding label, or if we've reached the | |
5476 | end of the bind(c) attribute without one. */ | |
5477 | if (gfc_match_char (',') == MATCH_YES) | |
5478 | { | |
5479 | if (gfc_match (" name = ") != MATCH_YES) | |
5480 | { | |
5481 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5482 | "at %C"); | |
5483 | /* should give an error message here */ | |
5484 | return MATCH_ERROR; | |
5485 | } | |
5486 | ||
5487 | has_name_equals = 1; | |
5488 | ||
5489 | /* Get the opening quote. */ | |
5490 | double_quote = MATCH_YES; | |
5491 | single_quote = MATCH_YES; | |
5492 | double_quote = gfc_match_char ('"'); | |
5493 | if (double_quote != MATCH_YES) | |
5494 | single_quote = gfc_match_char ('\''); | |
5495 | if (double_quote != MATCH_YES && single_quote != MATCH_YES) | |
5496 | { | |
5497 | gfc_error ("Syntax error in NAME= specifier for binding label " | |
5498 | "at %C"); | |
5499 | return MATCH_ERROR; | |
5500 | } | |
5501 | ||
5502 | /* Grab the binding label, using functions that will not lower | |
5503 | case the names automatically. */ | |
5504 | if (gfc_match_name_C (binding_label) != MATCH_YES) | |
5505 | return MATCH_ERROR; | |
5506 | ||
5507 | /* Get the closing quotation. */ | |
5508 | if (double_quote == MATCH_YES) | |
5509 | { | |
5510 | if (gfc_match_char ('"') != MATCH_YES) | |
5511 | { | |
5512 | gfc_error ("Missing closing quote '\"' for binding label at %C"); | |
5513 | /* User started string with '"' so looked to match it. */ | |
5514 | return MATCH_ERROR; | |
5515 | } | |
5516 | } | |
5517 | else | |
5518 | { | |
5519 | if (gfc_match_char ('\'') != MATCH_YES) | |
5520 | { | |
5521 | gfc_error ("Missing closing quote '\'' for binding label at %C"); | |
5522 | /* User started string with "'" char. */ | |
5523 | return MATCH_ERROR; | |
5524 | } | |
5525 | } | |
5526 | } | |
5527 | ||
5528 | /* Get the required right paren. */ | |
5529 | if (gfc_match_char (')') != MATCH_YES) | |
5530 | { | |
5531 | gfc_error ("Missing closing paren for binding label at %C"); | |
5532 | return MATCH_ERROR; | |
5533 | } | |
5534 | ||
1eabf70a TB |
5535 | if (has_name_equals && !allow_binding_name) |
5536 | { | |
5537 | gfc_error ("No binding name is allowed in BIND(C) at %C"); | |
5538 | return MATCH_ERROR; | |
5539 | } | |
5540 | ||
5541 | if (has_name_equals && sym != NULL && sym->attr.dummy) | |
5542 | { | |
5543 | gfc_error ("For dummy procedure %s, no binding name is " | |
5544 | "allowed in BIND(C) at %C", sym->name); | |
5545 | return MATCH_ERROR; | |
5546 | } | |
5547 | ||
5548 | ||
a8b3b0b6 CR |
5549 | /* Save the binding label to the symbol. If sym is null, we're |
5550 | probably matching the typespec attributes of a declaration and | |
5551 | haven't gotten the name yet, and therefore, no symbol yet. */ | |
5552 | if (binding_label[0] != '\0') | |
5553 | { | |
5554 | if (sym != NULL) | |
5555 | { | |
c5b5a17a | 5556 | strcpy (sym->binding_label, binding_label); |
a8b3b0b6 CR |
5557 | } |
5558 | else | |
c5b5a17a | 5559 | strcpy (curr_binding_label, binding_label); |
a8b3b0b6 | 5560 | } |
1eabf70a | 5561 | else if (allow_binding_name) |
a8b3b0b6 CR |
5562 | { |
5563 | /* No binding label, but if symbol isn't null, we | |
1eabf70a TB |
5564 | can set the label for it here. |
5565 | If name="" or allow_binding_name is false, no C binding name is | |
5566 | created. */ | |
a8b3b0b6 CR |
5567 | if (sym != NULL && sym->name != NULL && has_name_equals == 0) |
5568 | strncpy (sym->binding_label, sym->name, strlen (sym->name) + 1); | |
5569 | } | |
9e1d712c | 5570 | |
129d15a3 JW |
5571 | if (has_name_equals && gfc_current_state () == COMP_INTERFACE |
5572 | && current_interface.type == INTERFACE_ABSTRACT) | |
9e1d712c TB |
5573 | { |
5574 | gfc_error ("NAME not allowed on BIND(C) for ABSTRACT INTERFACE at %C"); | |
5575 | return MATCH_ERROR; | |
5576 | } | |
5577 | ||
a8b3b0b6 CR |
5578 | return MATCH_YES; |
5579 | } | |
5580 | ||
5581 | ||
1f2959f0 | 5582 | /* Return nonzero if we're currently compiling a contained procedure. */ |
ddc9ce91 TS |
5583 | |
5584 | static int | |
5585 | contained_procedure (void) | |
5586 | { | |
083de129 | 5587 | gfc_state_data *s = gfc_state_stack; |
ddc9ce91 | 5588 | |
083de129 TB |
5589 | if ((s->state == COMP_SUBROUTINE || s->state == COMP_FUNCTION) |
5590 | && s->previous != NULL && s->previous->state == COMP_CONTAINS) | |
5591 | return 1; | |
ddc9ce91 TS |
5592 | |
5593 | return 0; | |
5594 | } | |
5595 | ||
d51347f9 | 5596 | /* Set the kind of each enumerator. The kind is selected such that it is |
25d8f0a2 TS |
5597 | interoperable with the corresponding C enumeration type, making |
5598 | sure that -fshort-enums is honored. */ | |
5599 | ||
5600 | static void | |
5601 | set_enum_kind(void) | |
5602 | { | |
5603 | enumerator_history *current_history = NULL; | |
5604 | int kind; | |
5605 | int i; | |
5606 | ||
5607 | if (max_enum == NULL || enum_history == NULL) | |
5608 | return; | |
5609 | ||
cab129d1 | 5610 | if (!flag_short_enums) |
d51347f9 TB |
5611 | return; |
5612 | ||
25d8f0a2 TS |
5613 | i = 0; |
5614 | do | |
5615 | { | |
5616 | kind = gfc_integer_kinds[i++].kind; | |
5617 | } | |
d51347f9 | 5618 | while (kind < gfc_c_int_kind |
25d8f0a2 TS |
5619 | && gfc_check_integer_range (max_enum->initializer->value.integer, |
5620 | kind) != ARITH_OK); | |
5621 | ||
5622 | current_history = enum_history; | |
5623 | while (current_history != NULL) | |
5624 | { | |
5625 | current_history->sym->ts.kind = kind; | |
5626 | current_history = current_history->next; | |
5627 | } | |
5628 | } | |
5629 | ||
636dff67 | 5630 | |
6de9cd9a | 5631 | /* Match any of the various end-block statements. Returns the type of |
9abe5e56 DK |
5632 | END to the caller. The END INTERFACE, END IF, END DO, END SELECT |
5633 | and END BLOCK statements cannot be replaced by a single END statement. */ | |
6de9cd9a DN |
5634 | |
5635 | match | |
636dff67 | 5636 | gfc_match_end (gfc_statement *st) |
6de9cd9a DN |
5637 | { |
5638 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5639 | gfc_compile_state state; | |
5640 | locus old_loc; | |
5641 | const char *block_name; | |
5642 | const char *target; | |
ddc9ce91 | 5643 | int eos_ok; |
6de9cd9a DN |
5644 | match m; |
5645 | ||
63645982 | 5646 | old_loc = gfc_current_locus; |
6de9cd9a DN |
5647 | if (gfc_match ("end") != MATCH_YES) |
5648 | return MATCH_NO; | |
5649 | ||
5650 | state = gfc_current_state (); | |
636dff67 SK |
5651 | block_name = gfc_current_block () == NULL |
5652 | ? NULL : gfc_current_block ()->name; | |
6de9cd9a | 5653 | |
03af1e4c | 5654 | switch (state) |
6de9cd9a | 5655 | { |
03af1e4c DK |
5656 | case COMP_ASSOCIATE: |
5657 | case COMP_BLOCK: | |
5658 | if (!strcmp (block_name, "block@")) | |
5659 | block_name = NULL; | |
5660 | break; | |
5661 | ||
5662 | case COMP_CONTAINS: | |
5663 | case COMP_DERIVED_CONTAINS: | |
6de9cd9a | 5664 | state = gfc_state_stack->previous->state; |
636dff67 SK |
5665 | block_name = gfc_state_stack->previous->sym == NULL |
5666 | ? NULL : gfc_state_stack->previous->sym->name; | |
03af1e4c DK |
5667 | break; |
5668 | ||
5669 | default: | |
5670 | break; | |
6de9cd9a DN |
5671 | } |
5672 | ||
5673 | switch (state) | |
5674 | { | |
5675 | case COMP_NONE: | |
5676 | case COMP_PROGRAM: | |
5677 | *st = ST_END_PROGRAM; | |
5678 | target = " program"; | |
ddc9ce91 | 5679 | eos_ok = 1; |
6de9cd9a DN |
5680 | break; |
5681 | ||
5682 | case COMP_SUBROUTINE: | |
5683 | *st = ST_END_SUBROUTINE; | |
5684 | target = " subroutine"; | |
ddc9ce91 | 5685 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
5686 | break; |
5687 | ||
5688 | case COMP_FUNCTION: | |
5689 | *st = ST_END_FUNCTION; | |
5690 | target = " function"; | |
ddc9ce91 | 5691 | eos_ok = !contained_procedure (); |
6de9cd9a DN |
5692 | break; |
5693 | ||
5694 | case COMP_BLOCK_DATA: | |
5695 | *st = ST_END_BLOCK_DATA; | |
5696 | target = " block data"; | |
ddc9ce91 | 5697 | eos_ok = 1; |
6de9cd9a DN |
5698 | break; |
5699 | ||
5700 | case COMP_MODULE: | |
5701 | *st = ST_END_MODULE; | |
5702 | target = " module"; | |
ddc9ce91 | 5703 | eos_ok = 1; |
6de9cd9a DN |
5704 | break; |
5705 | ||
5706 | case COMP_INTERFACE: | |
5707 | *st = ST_END_INTERFACE; | |
5708 | target = " interface"; | |
ddc9ce91 | 5709 | eos_ok = 0; |
6de9cd9a DN |
5710 | break; |
5711 | ||
5712 | case COMP_DERIVED: | |
30b608eb | 5713 | case COMP_DERIVED_CONTAINS: |
6de9cd9a DN |
5714 | *st = ST_END_TYPE; |
5715 | target = " type"; | |
ddc9ce91 | 5716 | eos_ok = 0; |
6de9cd9a DN |
5717 | break; |
5718 | ||
03af1e4c DK |
5719 | case COMP_ASSOCIATE: |
5720 | *st = ST_END_ASSOCIATE; | |
5721 | target = " associate"; | |
5722 | eos_ok = 0; | |
5723 | break; | |
5724 | ||
9abe5e56 DK |
5725 | case COMP_BLOCK: |
5726 | *st = ST_END_BLOCK; | |
5727 | target = " block"; | |
5728 | eos_ok = 0; | |
5729 | break; | |
5730 | ||
6de9cd9a DN |
5731 | case COMP_IF: |
5732 | *st = ST_ENDIF; | |
5733 | target = " if"; | |
ddc9ce91 | 5734 | eos_ok = 0; |
6de9cd9a DN |
5735 | break; |
5736 | ||
5737 | case COMP_DO: | |
5738 | *st = ST_ENDDO; | |
5739 | target = " do"; | |
ddc9ce91 | 5740 | eos_ok = 0; |
6de9cd9a DN |
5741 | break; |
5742 | ||
d0a4a61c TB |
5743 | case COMP_CRITICAL: |
5744 | *st = ST_END_CRITICAL; | |
5745 | target = " critical"; | |
5746 | eos_ok = 0; | |
5747 | break; | |
5748 | ||
6de9cd9a | 5749 | case COMP_SELECT: |
cf2b3c22 | 5750 | case COMP_SELECT_TYPE: |
6de9cd9a DN |
5751 | *st = ST_END_SELECT; |
5752 | target = " select"; | |
ddc9ce91 | 5753 | eos_ok = 0; |
6de9cd9a DN |
5754 | break; |
5755 | ||
5756 | case COMP_FORALL: | |
5757 | *st = ST_END_FORALL; | |
5758 | target = " forall"; | |
ddc9ce91 | 5759 | eos_ok = 0; |
6de9cd9a DN |
5760 | break; |
5761 | ||
5762 | case COMP_WHERE: | |
5763 | *st = ST_END_WHERE; | |
5764 | target = " where"; | |
ddc9ce91 | 5765 | eos_ok = 0; |
6de9cd9a DN |
5766 | break; |
5767 | ||
25d8f0a2 TS |
5768 | case COMP_ENUM: |
5769 | *st = ST_END_ENUM; | |
5770 | target = " enum"; | |
5771 | eos_ok = 0; | |
5772 | last_initializer = NULL; | |
5773 | set_enum_kind (); | |
5774 | gfc_free_enum_history (); | |
5775 | break; | |
5776 | ||
6de9cd9a DN |
5777 | default: |
5778 | gfc_error ("Unexpected END statement at %C"); | |
5779 | goto cleanup; | |
5780 | } | |
5781 | ||
5782 | if (gfc_match_eos () == MATCH_YES) | |
5783 | { | |
272001a2 TB |
5784 | if (!eos_ok && (*st == ST_END_SUBROUTINE || *st == ST_END_FUNCTION)) |
5785 | { | |
5786 | if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: END statement " | |
5787 | "instead of %s statement at %L", | |
5788 | gfc_ascii_statement (*st), &old_loc) == FAILURE) | |
5789 | goto cleanup; | |
5790 | } | |
5791 | else if (!eos_ok) | |
6de9cd9a | 5792 | { |
66e4ab31 | 5793 | /* We would have required END [something]. */ |
59ce85b5 TS |
5794 | gfc_error ("%s statement expected at %L", |
5795 | gfc_ascii_statement (*st), &old_loc); | |
6de9cd9a DN |
5796 | goto cleanup; |
5797 | } | |
5798 | ||
5799 | return MATCH_YES; | |
5800 | } | |
5801 | ||
5802 | /* Verify that we've got the sort of end-block that we're expecting. */ | |
5803 | if (gfc_match (target) != MATCH_YES) | |
5804 | { | |
5805 | gfc_error ("Expecting %s statement at %C", gfc_ascii_statement (*st)); | |
5806 | goto cleanup; | |
5807 | } | |
5808 | ||
5809 | /* If we're at the end, make sure a block name wasn't required. */ | |
5810 | if (gfc_match_eos () == MATCH_YES) | |
5811 | { | |
5812 | ||
690af379 | 5813 | if (*st != ST_ENDDO && *st != ST_ENDIF && *st != ST_END_SELECT |
d0a4a61c | 5814 | && *st != ST_END_FORALL && *st != ST_END_WHERE && *st != ST_END_BLOCK |
03af1e4c | 5815 | && *st != ST_END_ASSOCIATE && *st != ST_END_CRITICAL) |
6de9cd9a DN |
5816 | return MATCH_YES; |
5817 | ||
9abe5e56 | 5818 | if (!block_name) |
6de9cd9a DN |
5819 | return MATCH_YES; |
5820 | ||
5821 | gfc_error ("Expected block name of '%s' in %s statement at %C", | |
5822 | block_name, gfc_ascii_statement (*st)); | |
5823 | ||
5824 | return MATCH_ERROR; | |
5825 | } | |
5826 | ||
5827 | /* END INTERFACE has a special handler for its several possible endings. */ | |
5828 | if (*st == ST_END_INTERFACE) | |
5829 | return gfc_match_end_interface (); | |
5830 | ||
66e4ab31 SK |
5831 | /* We haven't hit the end of statement, so what is left must be an |
5832 | end-name. */ | |
6de9cd9a DN |
5833 | m = gfc_match_space (); |
5834 | if (m == MATCH_YES) | |
5835 | m = gfc_match_name (name); | |
5836 | ||
5837 | if (m == MATCH_NO) | |
5838 | gfc_error ("Expected terminating name at %C"); | |
5839 | if (m != MATCH_YES) | |
5840 | goto cleanup; | |
5841 | ||
5842 | if (block_name == NULL) | |
5843 | goto syntax; | |
5844 | ||
3070bab4 | 5845 | if (strcmp (name, block_name) != 0 && strcmp (block_name, "ppr@") != 0) |
6de9cd9a DN |
5846 | { |
5847 | gfc_error ("Expected label '%s' for %s statement at %C", block_name, | |
5848 | gfc_ascii_statement (*st)); | |
5849 | goto cleanup; | |
5850 | } | |
3070bab4 JW |
5851 | /* Procedure pointer as function result. */ |
5852 | else if (strcmp (block_name, "ppr@") == 0 | |
5853 | && strcmp (name, gfc_current_block ()->ns->proc_name->name) != 0) | |
5854 | { | |
5855 | gfc_error ("Expected label '%s' for %s statement at %C", | |
5856 | gfc_current_block ()->ns->proc_name->name, | |
5857 | gfc_ascii_statement (*st)); | |
5858 | goto cleanup; | |
5859 | } | |
6de9cd9a DN |
5860 | |
5861 | if (gfc_match_eos () == MATCH_YES) | |
5862 | return MATCH_YES; | |
5863 | ||
5864 | syntax: | |
5865 | gfc_syntax_error (*st); | |
5866 | ||
5867 | cleanup: | |
63645982 | 5868 | gfc_current_locus = old_loc; |
6de9cd9a DN |
5869 | return MATCH_ERROR; |
5870 | } | |
5871 | ||
5872 | ||
5873 | ||
5874 | /***************** Attribute declaration statements ****************/ | |
5875 | ||
5876 | /* Set the attribute of a single variable. */ | |
5877 | ||
5878 | static match | |
5879 | attr_decl1 (void) | |
5880 | { | |
5881 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5882 | gfc_array_spec *as; | |
5883 | gfc_symbol *sym; | |
5884 | locus var_locus; | |
5885 | match m; | |
5886 | ||
5887 | as = NULL; | |
5888 | ||
5889 | m = gfc_match_name (name); | |
5890 | if (m != MATCH_YES) | |
5891 | goto cleanup; | |
5892 | ||
08a6b8e0 | 5893 | if (find_special (name, &sym, false)) |
6de9cd9a DN |
5894 | return MATCH_ERROR; |
5895 | ||
63645982 | 5896 | var_locus = gfc_current_locus; |
6de9cd9a DN |
5897 | |
5898 | /* Deal with possible array specification for certain attributes. */ | |
5899 | if (current_attr.dimension | |
be59db2d | 5900 | || current_attr.codimension |
6de9cd9a DN |
5901 | || current_attr.allocatable |
5902 | || current_attr.pointer | |
5903 | || current_attr.target) | |
5904 | { | |
be59db2d TB |
5905 | m = gfc_match_array_spec (&as, !current_attr.codimension, |
5906 | !current_attr.dimension | |
5907 | && !current_attr.pointer | |
5908 | && !current_attr.target); | |
6de9cd9a DN |
5909 | if (m == MATCH_ERROR) |
5910 | goto cleanup; | |
5911 | ||
5912 | if (current_attr.dimension && m == MATCH_NO) | |
5913 | { | |
636dff67 SK |
5914 | gfc_error ("Missing array specification at %L in DIMENSION " |
5915 | "statement", &var_locus); | |
6de9cd9a DN |
5916 | m = MATCH_ERROR; |
5917 | goto cleanup; | |
5918 | } | |
5919 | ||
1283ab12 TB |
5920 | if (current_attr.dimension && sym->value) |
5921 | { | |
5922 | gfc_error ("Dimensions specified for %s at %L after its " | |
5923 | "initialisation", sym->name, &var_locus); | |
5924 | m = MATCH_ERROR; | |
5925 | goto cleanup; | |
5926 | } | |
5927 | ||
be59db2d TB |
5928 | if (current_attr.codimension && m == MATCH_NO) |
5929 | { | |
5930 | gfc_error ("Missing array specification at %L in CODIMENSION " | |
5931 | "statement", &var_locus); | |
5932 | m = MATCH_ERROR; | |
5933 | goto cleanup; | |
5934 | } | |
5935 | ||
6de9cd9a DN |
5936 | if ((current_attr.allocatable || current_attr.pointer) |
5937 | && (m == MATCH_YES) && (as->type != AS_DEFERRED)) | |
5938 | { | |
636dff67 | 5939 | gfc_error ("Array specification must be deferred at %L", &var_locus); |
6de9cd9a DN |
5940 | m = MATCH_ERROR; |
5941 | goto cleanup; | |
5942 | } | |
5943 | } | |
5944 | ||
2e23972e JW |
5945 | /* Update symbol table. DIMENSION attribute is set in |
5946 | gfc_set_array_spec(). For CLASS variables, this must be applied | |
5947 | to the first component, or '$data' field. */ | |
d40477b4 | 5948 | if (sym->ts.type == BT_CLASS && sym->ts.u.derived->attr.is_class) |
6de9cd9a | 5949 | { |
7a08eda1 JW |
5950 | if (gfc_copy_attr (&CLASS_DATA (sym)->attr, ¤t_attr,&var_locus) |
5951 | == FAILURE) | |
2e23972e JW |
5952 | { |
5953 | m = MATCH_ERROR; | |
5954 | goto cleanup; | |
5955 | } | |
2e23972e JW |
5956 | } |
5957 | else | |
5958 | { | |
be59db2d TB |
5959 | if (current_attr.dimension == 0 && current_attr.codimension == 0 |
5960 | && gfc_copy_attr (&sym->attr, ¤t_attr, &var_locus) == FAILURE) | |
2e23972e JW |
5961 | { |
5962 | m = MATCH_ERROR; | |
5963 | goto cleanup; | |
5964 | } | |
6de9cd9a | 5965 | } |
d40477b4 JW |
5966 | |
5967 | if (sym->ts.type == BT_CLASS && !sym->attr.class_ok | |
5968 | && (sym->attr.class_ok = sym->attr.class_ok || current_attr.allocatable | |
5969 | || current_attr.pointer)) | |
5970 | gfc_build_class_symbol (&sym->ts, &sym->attr, &sym->as, false); | |
6de9cd9a DN |
5971 | |
5972 | if (gfc_set_array_spec (sym, as, &var_locus) == FAILURE) | |
5973 | { | |
5974 | m = MATCH_ERROR; | |
5975 | goto cleanup; | |
5976 | } | |
d51347f9 | 5977 | |
83d890b9 AL |
5978 | if (sym->attr.cray_pointee && sym->as != NULL) |
5979 | { | |
5980 | /* Fix the array spec. */ | |
5981 | m = gfc_mod_pointee_as (sym->as); | |
5982 | if (m == MATCH_ERROR) | |
5983 | goto cleanup; | |
5984 | } | |
6de9cd9a | 5985 | |
7114edca | 5986 | if (gfc_add_attribute (&sym->attr, &var_locus) == FAILURE) |
1902704e PT |
5987 | { |
5988 | m = MATCH_ERROR; | |
5989 | goto cleanup; | |
5990 | } | |
5991 | ||
6de9cd9a DN |
5992 | if ((current_attr.external || current_attr.intrinsic) |
5993 | && sym->attr.flavor != FL_PROCEDURE | |
231b2fcc | 5994 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
5995 | { |
5996 | m = MATCH_ERROR; | |
5997 | goto cleanup; | |
5998 | } | |
5999 | ||
3070bab4 JW |
6000 | add_hidden_procptr_result (sym); |
6001 | ||
6de9cd9a DN |
6002 | return MATCH_YES; |
6003 | ||
6004 | cleanup: | |
6005 | gfc_free_array_spec (as); | |
6006 | return m; | |
6007 | } | |
6008 | ||
6009 | ||
6010 | /* Generic attribute declaration subroutine. Used for attributes that | |
6011 | just have a list of names. */ | |
6012 | ||
6013 | static match | |
6014 | attr_decl (void) | |
6015 | { | |
6016 | match m; | |
6017 | ||
6018 | /* Gobble the optional double colon, by simply ignoring the result | |
6019 | of gfc_match(). */ | |
6020 | gfc_match (" ::"); | |
6021 | ||
6022 | for (;;) | |
6023 | { | |
6024 | m = attr_decl1 (); | |
6025 | if (m != MATCH_YES) | |
6026 | break; | |
6027 | ||
6028 | if (gfc_match_eos () == MATCH_YES) | |
6029 | { | |
6030 | m = MATCH_YES; | |
6031 | break; | |
6032 | } | |
6033 | ||
6034 | if (gfc_match_char (',') != MATCH_YES) | |
6035 | { | |
6036 | gfc_error ("Unexpected character in variable list at %C"); | |
6037 | m = MATCH_ERROR; | |
6038 | break; | |
6039 | } | |
6040 | } | |
6041 | ||
6042 | return m; | |
6043 | } | |
6044 | ||
6045 | ||
83d890b9 AL |
6046 | /* This routine matches Cray Pointer declarations of the form: |
6047 | pointer ( <pointer>, <pointee> ) | |
6048 | or | |
d51347f9 TB |
6049 | pointer ( <pointer1>, <pointee1> ), ( <pointer2>, <pointee2> ), ... |
6050 | The pointer, if already declared, should be an integer. Otherwise, we | |
83d890b9 AL |
6051 | set it as BT_INTEGER with kind gfc_index_integer_kind. The pointee may |
6052 | be either a scalar, or an array declaration. No space is allocated for | |
d51347f9 | 6053 | the pointee. For the statement |
83d890b9 AL |
6054 | pointer (ipt, ar(10)) |
6055 | any subsequent uses of ar will be translated (in C-notation) as | |
d51347f9 | 6056 | ar(i) => ((<type> *) ipt)(i) |
b122dc6a | 6057 | After gimplification, pointee variable will disappear in the code. */ |
83d890b9 AL |
6058 | |
6059 | static match | |
6060 | cray_pointer_decl (void) | |
6061 | { | |
6062 | match m; | |
be59db2d | 6063 | gfc_array_spec *as = NULL; |
83d890b9 AL |
6064 | gfc_symbol *cptr; /* Pointer symbol. */ |
6065 | gfc_symbol *cpte; /* Pointee symbol. */ | |
6066 | locus var_locus; | |
6067 | bool done = false; | |
6068 | ||
6069 | while (!done) | |
6070 | { | |
6071 | if (gfc_match_char ('(') != MATCH_YES) | |
6072 | { | |
6073 | gfc_error ("Expected '(' at %C"); | |
d51347f9 | 6074 | return MATCH_ERROR; |
83d890b9 | 6075 | } |
d51347f9 | 6076 | |
83d890b9 AL |
6077 | /* Match pointer. */ |
6078 | var_locus = gfc_current_locus; | |
6079 | gfc_clear_attr (¤t_attr); | |
6080 | gfc_add_cray_pointer (¤t_attr, &var_locus); | |
6081 | current_ts.type = BT_INTEGER; | |
6082 | current_ts.kind = gfc_index_integer_kind; | |
6083 | ||
d51347f9 | 6084 | m = gfc_match_symbol (&cptr, 0); |
83d890b9 AL |
6085 | if (m != MATCH_YES) |
6086 | { | |
6087 | gfc_error ("Expected variable name at %C"); | |
6088 | return m; | |
6089 | } | |
d51347f9 | 6090 | |
83d890b9 AL |
6091 | if (gfc_add_cray_pointer (&cptr->attr, &var_locus) == FAILURE) |
6092 | return MATCH_ERROR; | |
6093 | ||
d51347f9 | 6094 | gfc_set_sym_referenced (cptr); |
83d890b9 AL |
6095 | |
6096 | if (cptr->ts.type == BT_UNKNOWN) /* Override the type, if necessary. */ | |
6097 | { | |
6098 | cptr->ts.type = BT_INTEGER; | |
d51347f9 | 6099 | cptr->ts.kind = gfc_index_integer_kind; |
83d890b9 AL |
6100 | } |
6101 | else if (cptr->ts.type != BT_INTEGER) | |
6102 | { | |
e25a0da3 | 6103 | gfc_error ("Cray pointer at %C must be an integer"); |
83d890b9 AL |
6104 | return MATCH_ERROR; |
6105 | } | |
6106 | else if (cptr->ts.kind < gfc_index_integer_kind) | |
6107 | gfc_warning ("Cray pointer at %C has %d bytes of precision;" | |
e25a0da3 | 6108 | " memory addresses require %d bytes", |
636dff67 | 6109 | cptr->ts.kind, gfc_index_integer_kind); |
83d890b9 AL |
6110 | |
6111 | if (gfc_match_char (',') != MATCH_YES) | |
6112 | { | |
6113 | gfc_error ("Expected \",\" at %C"); | |
d51347f9 | 6114 | return MATCH_ERROR; |
83d890b9 AL |
6115 | } |
6116 | ||
d51347f9 | 6117 | /* Match Pointee. */ |
83d890b9 AL |
6118 | var_locus = gfc_current_locus; |
6119 | gfc_clear_attr (¤t_attr); | |
6120 | gfc_add_cray_pointee (¤t_attr, &var_locus); | |
6121 | current_ts.type = BT_UNKNOWN; | |
6122 | current_ts.kind = 0; | |
6123 | ||
6124 | m = gfc_match_symbol (&cpte, 0); | |
6125 | if (m != MATCH_YES) | |
6126 | { | |
6127 | gfc_error ("Expected variable name at %C"); | |
6128 | return m; | |
6129 | } | |
d51347f9 | 6130 | |
83d890b9 | 6131 | /* Check for an optional array spec. */ |
be59db2d | 6132 | m = gfc_match_array_spec (&as, true, false); |
83d890b9 AL |
6133 | if (m == MATCH_ERROR) |
6134 | { | |
6135 | gfc_free_array_spec (as); | |
6136 | return m; | |
6137 | } | |
6138 | else if (m == MATCH_NO) | |
6139 | { | |
6140 | gfc_free_array_spec (as); | |
6141 | as = NULL; | |
6142 | } | |
6143 | ||
6144 | if (gfc_add_cray_pointee (&cpte->attr, &var_locus) == FAILURE) | |
6145 | return MATCH_ERROR; | |
6146 | ||
6147 | gfc_set_sym_referenced (cpte); | |
6148 | ||
6149 | if (cpte->as == NULL) | |
6150 | { | |
6151 | if (gfc_set_array_spec (cpte, as, &var_locus) == FAILURE) | |
6152 | gfc_internal_error ("Couldn't set Cray pointee array spec."); | |
6153 | } | |
6154 | else if (as != NULL) | |
6155 | { | |
e25a0da3 | 6156 | gfc_error ("Duplicate array spec for Cray pointee at %C"); |
83d890b9 AL |
6157 | gfc_free_array_spec (as); |
6158 | return MATCH_ERROR; | |
6159 | } | |
6160 | ||
6161 | as = NULL; | |
6162 | ||
6163 | if (cpte->as != NULL) | |
6164 | { | |
6165 | /* Fix array spec. */ | |
6166 | m = gfc_mod_pointee_as (cpte->as); | |
6167 | if (m == MATCH_ERROR) | |
6168 | return m; | |
6169 | } | |
6170 | ||
6171 | /* Point the Pointee at the Pointer. */ | |
b122dc6a | 6172 | cpte->cp_pointer = cptr; |
83d890b9 AL |
6173 | |
6174 | if (gfc_match_char (')') != MATCH_YES) | |
6175 | { | |
6176 | gfc_error ("Expected \")\" at %C"); | |
6177 | return MATCH_ERROR; | |
6178 | } | |
6179 | m = gfc_match_char (','); | |
6180 | if (m != MATCH_YES) | |
6181 | done = true; /* Stop searching for more declarations. */ | |
6182 | ||
6183 | } | |
6184 | ||
6185 | if (m == MATCH_ERROR /* Failed when trying to find ',' above. */ | |
6186 | || gfc_match_eos () != MATCH_YES) | |
6187 | { | |
6188 | gfc_error ("Expected \",\" or end of statement at %C"); | |
6189 | return MATCH_ERROR; | |
6190 | } | |
6191 | return MATCH_YES; | |
6192 | } | |
6193 | ||
6194 | ||
6de9cd9a DN |
6195 | match |
6196 | gfc_match_external (void) | |
6197 | { | |
6198 | ||
6199 | gfc_clear_attr (¤t_attr); | |
1902704e | 6200 | current_attr.external = 1; |
6de9cd9a DN |
6201 | |
6202 | return attr_decl (); | |
6203 | } | |
6204 | ||
6205 | ||
6de9cd9a DN |
6206 | match |
6207 | gfc_match_intent (void) | |
6208 | { | |
6209 | sym_intent intent; | |
6210 | ||
9abe5e56 DK |
6211 | /* This is not allowed within a BLOCK construct! */ |
6212 | if (gfc_current_state () == COMP_BLOCK) | |
6213 | { | |
6214 | gfc_error ("INTENT is not allowed inside of BLOCK at %C"); | |
6215 | return MATCH_ERROR; | |
6216 | } | |
6217 | ||
6de9cd9a DN |
6218 | intent = match_intent_spec (); |
6219 | if (intent == INTENT_UNKNOWN) | |
6220 | return MATCH_ERROR; | |
6221 | ||
6222 | gfc_clear_attr (¤t_attr); | |
1902704e | 6223 | current_attr.intent = intent; |
6de9cd9a DN |
6224 | |
6225 | return attr_decl (); | |
6226 | } | |
6227 | ||
6228 | ||
6229 | match | |
6230 | gfc_match_intrinsic (void) | |
6231 | { | |
6232 | ||
6233 | gfc_clear_attr (¤t_attr); | |
1902704e | 6234 | current_attr.intrinsic = 1; |
6de9cd9a DN |
6235 | |
6236 | return attr_decl (); | |
6237 | } | |
6238 | ||
6239 | ||
6240 | match | |
6241 | gfc_match_optional (void) | |
6242 | { | |
9abe5e56 DK |
6243 | /* This is not allowed within a BLOCK construct! */ |
6244 | if (gfc_current_state () == COMP_BLOCK) | |
6245 | { | |
6246 | gfc_error ("OPTIONAL is not allowed inside of BLOCK at %C"); | |
6247 | return MATCH_ERROR; | |
6248 | } | |
6de9cd9a DN |
6249 | |
6250 | gfc_clear_attr (¤t_attr); | |
1902704e | 6251 | current_attr.optional = 1; |
6de9cd9a DN |
6252 | |
6253 | return attr_decl (); | |
6254 | } | |
6255 | ||
6256 | ||
6257 | match | |
6258 | gfc_match_pointer (void) | |
6259 | { | |
83d890b9 | 6260 | gfc_gobble_whitespace (); |
8fc541d3 | 6261 | if (gfc_peek_ascii_char () == '(') |
83d890b9 AL |
6262 | { |
6263 | if (!gfc_option.flag_cray_pointer) | |
6264 | { | |
636dff67 SK |
6265 | gfc_error ("Cray pointer declaration at %C requires -fcray-pointer " |
6266 | "flag"); | |
83d890b9 AL |
6267 | return MATCH_ERROR; |
6268 | } | |
6269 | return cray_pointer_decl (); | |
6270 | } | |
6271 | else | |
6272 | { | |
6273 | gfc_clear_attr (¤t_attr); | |
1902704e | 6274 | current_attr.pointer = 1; |
83d890b9 AL |
6275 | |
6276 | return attr_decl (); | |
6277 | } | |
6de9cd9a DN |
6278 | } |
6279 | ||
6280 | ||
6281 | match | |
6282 | gfc_match_allocatable (void) | |
6283 | { | |
6de9cd9a | 6284 | gfc_clear_attr (¤t_attr); |
1902704e | 6285 | current_attr.allocatable = 1; |
6de9cd9a DN |
6286 | |
6287 | return attr_decl (); | |
6288 | } | |
6289 | ||
6290 | ||
be59db2d TB |
6291 | match |
6292 | gfc_match_codimension (void) | |
6293 | { | |
6294 | gfc_clear_attr (¤t_attr); | |
6295 | current_attr.codimension = 1; | |
6296 | ||
6297 | return attr_decl (); | |
6298 | } | |
6299 | ||
6300 | ||
fe4e525c TB |
6301 | match |
6302 | gfc_match_contiguous (void) | |
6303 | { | |
6304 | if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: CONTIGUOUS statement at %C") | |
6305 | == FAILURE) | |
6306 | return MATCH_ERROR; | |
6307 | ||
6308 | gfc_clear_attr (¤t_attr); | |
6309 | current_attr.contiguous = 1; | |
6310 | ||
6311 | return attr_decl (); | |
6312 | } | |
6313 | ||
6314 | ||
6de9cd9a DN |
6315 | match |
6316 | gfc_match_dimension (void) | |
6317 | { | |
6de9cd9a | 6318 | gfc_clear_attr (¤t_attr); |
1902704e | 6319 | current_attr.dimension = 1; |
6de9cd9a DN |
6320 | |
6321 | return attr_decl (); | |
6322 | } | |
6323 | ||
6324 | ||
6325 | match | |
6326 | gfc_match_target (void) | |
6327 | { | |
6de9cd9a | 6328 | gfc_clear_attr (¤t_attr); |
1902704e | 6329 | current_attr.target = 1; |
6de9cd9a DN |
6330 | |
6331 | return attr_decl (); | |
6332 | } | |
6333 | ||
6334 | ||
6335 | /* Match the list of entities being specified in a PUBLIC or PRIVATE | |
6336 | statement. */ | |
6337 | ||
6338 | static match | |
6339 | access_attr_decl (gfc_statement st) | |
6340 | { | |
6341 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6342 | interface_type type; | |
6343 | gfc_user_op *uop; | |
6344 | gfc_symbol *sym; | |
a1ee985f | 6345 | gfc_intrinsic_op op; |
6de9cd9a DN |
6346 | match m; |
6347 | ||
6348 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6349 | goto done; | |
6350 | ||
6351 | for (;;) | |
6352 | { | |
a1ee985f | 6353 | m = gfc_match_generic_spec (&type, name, &op); |
6de9cd9a DN |
6354 | if (m == MATCH_NO) |
6355 | goto syntax; | |
6356 | if (m == MATCH_ERROR) | |
6357 | return MATCH_ERROR; | |
6358 | ||
6359 | switch (type) | |
6360 | { | |
6361 | case INTERFACE_NAMELESS: | |
9e1d712c | 6362 | case INTERFACE_ABSTRACT: |
6de9cd9a DN |
6363 | goto syntax; |
6364 | ||
6365 | case INTERFACE_GENERIC: | |
6366 | if (gfc_get_symbol (name, NULL, &sym)) | |
6367 | goto done; | |
6368 | ||
636dff67 SK |
6369 | if (gfc_add_access (&sym->attr, (st == ST_PUBLIC) |
6370 | ? ACCESS_PUBLIC : ACCESS_PRIVATE, | |
231b2fcc | 6371 | sym->name, NULL) == FAILURE) |
6de9cd9a DN |
6372 | return MATCH_ERROR; |
6373 | ||
6374 | break; | |
6375 | ||
6376 | case INTERFACE_INTRINSIC_OP: | |
a1ee985f | 6377 | if (gfc_current_ns->operator_access[op] == ACCESS_UNKNOWN) |
6de9cd9a | 6378 | { |
a1ee985f | 6379 | gfc_current_ns->operator_access[op] = |
6de9cd9a DN |
6380 | (st == ST_PUBLIC) ? ACCESS_PUBLIC : ACCESS_PRIVATE; |
6381 | } | |
6382 | else | |
6383 | { | |
6384 | gfc_error ("Access specification of the %s operator at %C has " | |
a1ee985f | 6385 | "already been specified", gfc_op2string (op)); |
6de9cd9a DN |
6386 | goto done; |
6387 | } | |
6388 | ||
6389 | break; | |
6390 | ||
6391 | case INTERFACE_USER_OP: | |
6392 | uop = gfc_get_uop (name); | |
6393 | ||
6394 | if (uop->access == ACCESS_UNKNOWN) | |
6395 | { | |
636dff67 SK |
6396 | uop->access = (st == ST_PUBLIC) |
6397 | ? ACCESS_PUBLIC : ACCESS_PRIVATE; | |
6de9cd9a DN |
6398 | } |
6399 | else | |
6400 | { | |
636dff67 SK |
6401 | gfc_error ("Access specification of the .%s. operator at %C " |
6402 | "has already been specified", sym->name); | |
6de9cd9a DN |
6403 | goto done; |
6404 | } | |
6405 | ||
6406 | break; | |
6407 | } | |
6408 | ||
6409 | if (gfc_match_char (',') == MATCH_NO) | |
6410 | break; | |
6411 | } | |
6412 | ||
6413 | if (gfc_match_eos () != MATCH_YES) | |
6414 | goto syntax; | |
6415 | return MATCH_YES; | |
6416 | ||
6417 | syntax: | |
6418 | gfc_syntax_error (st); | |
6419 | ||
6420 | done: | |
6421 | return MATCH_ERROR; | |
6422 | } | |
6423 | ||
6424 | ||
ee7e677f TB |
6425 | match |
6426 | gfc_match_protected (void) | |
6427 | { | |
6428 | gfc_symbol *sym; | |
6429 | match m; | |
6430 | ||
6431 | if (gfc_current_ns->proc_name->attr.flavor != FL_MODULE) | |
6432 | { | |
6433 | gfc_error ("PROTECTED at %C only allowed in specification " | |
6434 | "part of a module"); | |
6435 | return MATCH_ERROR; | |
6436 | ||
6437 | } | |
6438 | ||
636dff67 | 6439 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PROTECTED statement at %C") |
ee7e677f TB |
6440 | == FAILURE) |
6441 | return MATCH_ERROR; | |
6442 | ||
6443 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6444 | { | |
6445 | return MATCH_ERROR; | |
6446 | } | |
6447 | ||
6448 | if (gfc_match_eos () == MATCH_YES) | |
6449 | goto syntax; | |
6450 | ||
6451 | for(;;) | |
6452 | { | |
6453 | m = gfc_match_symbol (&sym, 0); | |
6454 | switch (m) | |
6455 | { | |
6456 | case MATCH_YES: | |
636dff67 SK |
6457 | if (gfc_add_protected (&sym->attr, sym->name, &gfc_current_locus) |
6458 | == FAILURE) | |
ee7e677f TB |
6459 | return MATCH_ERROR; |
6460 | goto next_item; | |
6461 | ||
6462 | case MATCH_NO: | |
6463 | break; | |
6464 | ||
6465 | case MATCH_ERROR: | |
6466 | return MATCH_ERROR; | |
6467 | } | |
6468 | ||
6469 | next_item: | |
6470 | if (gfc_match_eos () == MATCH_YES) | |
6471 | break; | |
6472 | if (gfc_match_char (',') != MATCH_YES) | |
6473 | goto syntax; | |
6474 | } | |
6475 | ||
6476 | return MATCH_YES; | |
6477 | ||
6478 | syntax: | |
6479 | gfc_error ("Syntax error in PROTECTED statement at %C"); | |
6480 | return MATCH_ERROR; | |
6481 | } | |
6482 | ||
6483 | ||
86bf520d | 6484 | /* The PRIVATE statement is a bit weird in that it can be an attribute |
df2fba9e | 6485 | declaration, but also works as a standalone statement inside of a |
6de9cd9a DN |
6486 | type declaration or a module. */ |
6487 | ||
6488 | match | |
636dff67 | 6489 | gfc_match_private (gfc_statement *st) |
6de9cd9a DN |
6490 | { |
6491 | ||
6492 | if (gfc_match ("private") != MATCH_YES) | |
6493 | return MATCH_NO; | |
6494 | ||
d51347f9 | 6495 | if (gfc_current_state () != COMP_MODULE |
30b608eb DK |
6496 | && !(gfc_current_state () == COMP_DERIVED |
6497 | && gfc_state_stack->previous | |
6498 | && gfc_state_stack->previous->state == COMP_MODULE) | |
6499 | && !(gfc_current_state () == COMP_DERIVED_CONTAINS | |
6500 | && gfc_state_stack->previous && gfc_state_stack->previous->previous | |
6501 | && gfc_state_stack->previous->previous->state == COMP_MODULE)) | |
d51347f9 TB |
6502 | { |
6503 | gfc_error ("PRIVATE statement at %C is only allowed in the " | |
6504 | "specification part of a module"); | |
6505 | return MATCH_ERROR; | |
6506 | } | |
6507 | ||
6de9cd9a DN |
6508 | if (gfc_current_state () == COMP_DERIVED) |
6509 | { | |
6510 | if (gfc_match_eos () == MATCH_YES) | |
6511 | { | |
6512 | *st = ST_PRIVATE; | |
6513 | return MATCH_YES; | |
6514 | } | |
6515 | ||
6516 | gfc_syntax_error (ST_PRIVATE); | |
6517 | return MATCH_ERROR; | |
6518 | } | |
6519 | ||
6520 | if (gfc_match_eos () == MATCH_YES) | |
6521 | { | |
6522 | *st = ST_PRIVATE; | |
6523 | return MATCH_YES; | |
6524 | } | |
6525 | ||
6526 | *st = ST_ATTR_DECL; | |
6527 | return access_attr_decl (ST_PRIVATE); | |
6528 | } | |
6529 | ||
6530 | ||
6531 | match | |
636dff67 | 6532 | gfc_match_public (gfc_statement *st) |
6de9cd9a DN |
6533 | { |
6534 | ||
6535 | if (gfc_match ("public") != MATCH_YES) | |
6536 | return MATCH_NO; | |
6537 | ||
d51347f9 TB |
6538 | if (gfc_current_state () != COMP_MODULE) |
6539 | { | |
6540 | gfc_error ("PUBLIC statement at %C is only allowed in the " | |
6541 | "specification part of a module"); | |
6542 | return MATCH_ERROR; | |
6543 | } | |
6544 | ||
6de9cd9a DN |
6545 | if (gfc_match_eos () == MATCH_YES) |
6546 | { | |
6547 | *st = ST_PUBLIC; | |
6548 | return MATCH_YES; | |
6549 | } | |
6550 | ||
6551 | *st = ST_ATTR_DECL; | |
6552 | return access_attr_decl (ST_PUBLIC); | |
6553 | } | |
6554 | ||
6555 | ||
6556 | /* Workhorse for gfc_match_parameter. */ | |
6557 | ||
6558 | static match | |
6559 | do_parm (void) | |
6560 | { | |
6561 | gfc_symbol *sym; | |
6562 | gfc_expr *init; | |
6563 | match m; | |
7919373d | 6564 | gfc_try t; |
6de9cd9a DN |
6565 | |
6566 | m = gfc_match_symbol (&sym, 0); | |
6567 | if (m == MATCH_NO) | |
6568 | gfc_error ("Expected variable name at %C in PARAMETER statement"); | |
6569 | ||
6570 | if (m != MATCH_YES) | |
6571 | return m; | |
6572 | ||
6573 | if (gfc_match_char ('=') == MATCH_NO) | |
6574 | { | |
6575 | gfc_error ("Expected = sign in PARAMETER statement at %C"); | |
6576 | return MATCH_ERROR; | |
6577 | } | |
6578 | ||
6579 | m = gfc_match_init_expr (&init); | |
6580 | if (m == MATCH_NO) | |
6581 | gfc_error ("Expected expression at %C in PARAMETER statement"); | |
6582 | if (m != MATCH_YES) | |
6583 | return m; | |
6584 | ||
6585 | if (sym->ts.type == BT_UNKNOWN | |
6586 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
6587 | { | |
6588 | m = MATCH_ERROR; | |
6589 | goto cleanup; | |
6590 | } | |
6591 | ||
6592 | if (gfc_check_assign_symbol (sym, init) == FAILURE | |
231b2fcc | 6593 | || gfc_add_flavor (&sym->attr, FL_PARAMETER, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
6594 | { |
6595 | m = MATCH_ERROR; | |
6596 | goto cleanup; | |
6597 | } | |
6598 | ||
1283ab12 TB |
6599 | if (sym->value) |
6600 | { | |
6601 | gfc_error ("Initializing already initialized variable at %C"); | |
6602 | m = MATCH_ERROR; | |
6603 | goto cleanup; | |
6604 | } | |
6605 | ||
7919373d TB |
6606 | t = add_init_expr_to_sym (sym->name, &init, &gfc_current_locus); |
6607 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
6de9cd9a DN |
6608 | |
6609 | cleanup: | |
6610 | gfc_free_expr (init); | |
6611 | return m; | |
6612 | } | |
6613 | ||
6614 | ||
6615 | /* Match a parameter statement, with the weird syntax that these have. */ | |
6616 | ||
6617 | match | |
6618 | gfc_match_parameter (void) | |
6619 | { | |
6620 | match m; | |
6621 | ||
6622 | if (gfc_match_char ('(') == MATCH_NO) | |
6623 | return MATCH_NO; | |
6624 | ||
6625 | for (;;) | |
6626 | { | |
6627 | m = do_parm (); | |
6628 | if (m != MATCH_YES) | |
6629 | break; | |
6630 | ||
6631 | if (gfc_match (" )%t") == MATCH_YES) | |
6632 | break; | |
6633 | ||
6634 | if (gfc_match_char (',') != MATCH_YES) | |
6635 | { | |
6636 | gfc_error ("Unexpected characters in PARAMETER statement at %C"); | |
6637 | m = MATCH_ERROR; | |
6638 | break; | |
6639 | } | |
6640 | } | |
6641 | ||
6642 | return m; | |
6643 | } | |
6644 | ||
6645 | ||
6646 | /* Save statements have a special syntax. */ | |
6647 | ||
6648 | match | |
6649 | gfc_match_save (void) | |
6650 | { | |
9056bd70 TS |
6651 | char n[GFC_MAX_SYMBOL_LEN+1]; |
6652 | gfc_common_head *c; | |
6de9cd9a DN |
6653 | gfc_symbol *sym; |
6654 | match m; | |
6655 | ||
6656 | if (gfc_match_eos () == MATCH_YES) | |
6657 | { | |
6658 | if (gfc_current_ns->seen_save) | |
6659 | { | |
636dff67 SK |
6660 | if (gfc_notify_std (GFC_STD_LEGACY, "Blanket SAVE statement at %C " |
6661 | "follows previous SAVE statement") | |
09e87839 AL |
6662 | == FAILURE) |
6663 | return MATCH_ERROR; | |
6de9cd9a DN |
6664 | } |
6665 | ||
6666 | gfc_current_ns->save_all = gfc_current_ns->seen_save = 1; | |
6667 | return MATCH_YES; | |
6668 | } | |
6669 | ||
6670 | if (gfc_current_ns->save_all) | |
6671 | { | |
636dff67 SK |
6672 | if (gfc_notify_std (GFC_STD_LEGACY, "SAVE statement at %C follows " |
6673 | "blanket SAVE statement") | |
09e87839 AL |
6674 | == FAILURE) |
6675 | return MATCH_ERROR; | |
6de9cd9a DN |
6676 | } |
6677 | ||
6678 | gfc_match (" ::"); | |
6679 | ||
6680 | for (;;) | |
6681 | { | |
6682 | m = gfc_match_symbol (&sym, 0); | |
6683 | switch (m) | |
6684 | { | |
6685 | case MATCH_YES: | |
636dff67 SK |
6686 | if (gfc_add_save (&sym->attr, sym->name, &gfc_current_locus) |
6687 | == FAILURE) | |
6de9cd9a DN |
6688 | return MATCH_ERROR; |
6689 | goto next_item; | |
6690 | ||
6691 | case MATCH_NO: | |
6692 | break; | |
6693 | ||
6694 | case MATCH_ERROR: | |
6695 | return MATCH_ERROR; | |
6696 | } | |
6697 | ||
9056bd70 | 6698 | m = gfc_match (" / %n /", &n); |
6de9cd9a DN |
6699 | if (m == MATCH_ERROR) |
6700 | return MATCH_ERROR; | |
6701 | if (m == MATCH_NO) | |
6702 | goto syntax; | |
6703 | ||
53814b8f | 6704 | c = gfc_get_common (n, 0); |
9056bd70 TS |
6705 | c->saved = 1; |
6706 | ||
6de9cd9a DN |
6707 | gfc_current_ns->seen_save = 1; |
6708 | ||
6709 | next_item: | |
6710 | if (gfc_match_eos () == MATCH_YES) | |
6711 | break; | |
6712 | if (gfc_match_char (',') != MATCH_YES) | |
6713 | goto syntax; | |
6714 | } | |
6715 | ||
6716 | return MATCH_YES; | |
6717 | ||
6718 | syntax: | |
6719 | gfc_error ("Syntax error in SAVE statement at %C"); | |
6720 | return MATCH_ERROR; | |
6721 | } | |
6722 | ||
6723 | ||
06469efd PT |
6724 | match |
6725 | gfc_match_value (void) | |
6726 | { | |
6727 | gfc_symbol *sym; | |
6728 | match m; | |
6729 | ||
9abe5e56 DK |
6730 | /* This is not allowed within a BLOCK construct! */ |
6731 | if (gfc_current_state () == COMP_BLOCK) | |
6732 | { | |
6733 | gfc_error ("VALUE is not allowed inside of BLOCK at %C"); | |
6734 | return MATCH_ERROR; | |
6735 | } | |
6736 | ||
636dff67 | 6737 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VALUE statement at %C") |
06469efd PT |
6738 | == FAILURE) |
6739 | return MATCH_ERROR; | |
6740 | ||
6741 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6742 | { | |
6743 | return MATCH_ERROR; | |
6744 | } | |
6745 | ||
6746 | if (gfc_match_eos () == MATCH_YES) | |
6747 | goto syntax; | |
6748 | ||
6749 | for(;;) | |
6750 | { | |
6751 | m = gfc_match_symbol (&sym, 0); | |
6752 | switch (m) | |
6753 | { | |
6754 | case MATCH_YES: | |
636dff67 SK |
6755 | if (gfc_add_value (&sym->attr, sym->name, &gfc_current_locus) |
6756 | == FAILURE) | |
06469efd PT |
6757 | return MATCH_ERROR; |
6758 | goto next_item; | |
6759 | ||
6760 | case MATCH_NO: | |
6761 | break; | |
6762 | ||
6763 | case MATCH_ERROR: | |
6764 | return MATCH_ERROR; | |
6765 | } | |
6766 | ||
6767 | next_item: | |
6768 | if (gfc_match_eos () == MATCH_YES) | |
6769 | break; | |
6770 | if (gfc_match_char (',') != MATCH_YES) | |
6771 | goto syntax; | |
6772 | } | |
6773 | ||
6774 | return MATCH_YES; | |
6775 | ||
6776 | syntax: | |
6777 | gfc_error ("Syntax error in VALUE statement at %C"); | |
6778 | return MATCH_ERROR; | |
6779 | } | |
6780 | ||
66e4ab31 | 6781 | |
775e6c3a TB |
6782 | match |
6783 | gfc_match_volatile (void) | |
6784 | { | |
6785 | gfc_symbol *sym; | |
6786 | match m; | |
6787 | ||
636dff67 | 6788 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: VOLATILE statement at %C") |
775e6c3a TB |
6789 | == FAILURE) |
6790 | return MATCH_ERROR; | |
6791 | ||
6792 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6793 | { | |
6794 | return MATCH_ERROR; | |
6795 | } | |
6796 | ||
6797 | if (gfc_match_eos () == MATCH_YES) | |
6798 | goto syntax; | |
6799 | ||
6800 | for(;;) | |
6801 | { | |
9bce3c1c | 6802 | /* VOLATILE is special because it can be added to host-associated |
be59db2d | 6803 | symbols locally. Except for coarrays. */ |
9bce3c1c | 6804 | m = gfc_match_symbol (&sym, 1); |
775e6c3a TB |
6805 | switch (m) |
6806 | { | |
6807 | case MATCH_YES: | |
be59db2d TB |
6808 | /* F2008, C560+C561. VOLATILE for host-/use-associated variable or |
6809 | for variable in a BLOCK which is defined outside of the BLOCK. */ | |
6810 | if (sym->ns != gfc_current_ns && sym->attr.codimension) | |
6811 | { | |
6812 | gfc_error ("Specifying VOLATILE for coarray variable '%s' at " | |
6813 | "%C, which is use-/host-associated", sym->name); | |
6814 | return MATCH_ERROR; | |
6815 | } | |
636dff67 SK |
6816 | if (gfc_add_volatile (&sym->attr, sym->name, &gfc_current_locus) |
6817 | == FAILURE) | |
775e6c3a TB |
6818 | return MATCH_ERROR; |
6819 | goto next_item; | |
6820 | ||
6821 | case MATCH_NO: | |
6822 | break; | |
6823 | ||
6824 | case MATCH_ERROR: | |
6825 | return MATCH_ERROR; | |
6826 | } | |
6827 | ||
6828 | next_item: | |
6829 | if (gfc_match_eos () == MATCH_YES) | |
6830 | break; | |
6831 | if (gfc_match_char (',') != MATCH_YES) | |
6832 | goto syntax; | |
6833 | } | |
6834 | ||
6835 | return MATCH_YES; | |
6836 | ||
6837 | syntax: | |
6838 | gfc_error ("Syntax error in VOLATILE statement at %C"); | |
6839 | return MATCH_ERROR; | |
6840 | } | |
6841 | ||
6842 | ||
1eee5628 TB |
6843 | match |
6844 | gfc_match_asynchronous (void) | |
6845 | { | |
6846 | gfc_symbol *sym; | |
6847 | match m; | |
6848 | ||
6849 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ASYNCHRONOUS statement at %C") | |
6850 | == FAILURE) | |
6851 | return MATCH_ERROR; | |
6852 | ||
6853 | if (gfc_match (" ::") == MATCH_NO && gfc_match_space () == MATCH_NO) | |
6854 | { | |
6855 | return MATCH_ERROR; | |
6856 | } | |
6857 | ||
6858 | if (gfc_match_eos () == MATCH_YES) | |
6859 | goto syntax; | |
6860 | ||
6861 | for(;;) | |
6862 | { | |
6863 | /* ASYNCHRONOUS is special because it can be added to host-associated | |
6864 | symbols locally. */ | |
6865 | m = gfc_match_symbol (&sym, 1); | |
6866 | switch (m) | |
6867 | { | |
6868 | case MATCH_YES: | |
6869 | if (gfc_add_asynchronous (&sym->attr, sym->name, &gfc_current_locus) | |
6870 | == FAILURE) | |
6871 | return MATCH_ERROR; | |
6872 | goto next_item; | |
6873 | ||
6874 | case MATCH_NO: | |
6875 | break; | |
6876 | ||
6877 | case MATCH_ERROR: | |
6878 | return MATCH_ERROR; | |
6879 | } | |
6880 | ||
6881 | next_item: | |
6882 | if (gfc_match_eos () == MATCH_YES) | |
6883 | break; | |
6884 | if (gfc_match_char (',') != MATCH_YES) | |
6885 | goto syntax; | |
6886 | } | |
6887 | ||
6888 | return MATCH_YES; | |
6889 | ||
6890 | syntax: | |
6891 | gfc_error ("Syntax error in ASYNCHRONOUS statement at %C"); | |
6892 | return MATCH_ERROR; | |
6893 | } | |
6894 | ||
6895 | ||
6de9cd9a DN |
6896 | /* Match a module procedure statement. Note that we have to modify |
6897 | symbols in the parent's namespace because the current one was there | |
49de9e73 | 6898 | to receive symbols that are in an interface's formal argument list. */ |
6de9cd9a DN |
6899 | |
6900 | match | |
6901 | gfc_match_modproc (void) | |
6902 | { | |
6903 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6904 | gfc_symbol *sym; | |
6905 | match m; | |
060fca4a | 6906 | gfc_namespace *module_ns; |
2b77e908 | 6907 | gfc_interface *old_interface_head, *interface; |
6de9cd9a DN |
6908 | |
6909 | if (gfc_state_stack->state != COMP_INTERFACE | |
6910 | || gfc_state_stack->previous == NULL | |
129d15a3 JW |
6911 | || current_interface.type == INTERFACE_NAMELESS |
6912 | || current_interface.type == INTERFACE_ABSTRACT) | |
6de9cd9a | 6913 | { |
636dff67 SK |
6914 | gfc_error ("MODULE PROCEDURE at %C must be in a generic module " |
6915 | "interface"); | |
6de9cd9a DN |
6916 | return MATCH_ERROR; |
6917 | } | |
6918 | ||
060fca4a PT |
6919 | module_ns = gfc_current_ns->parent; |
6920 | for (; module_ns; module_ns = module_ns->parent) | |
43dfd40c SK |
6921 | if (module_ns->proc_name->attr.flavor == FL_MODULE |
6922 | || module_ns->proc_name->attr.flavor == FL_PROGRAM | |
6923 | || (module_ns->proc_name->attr.flavor == FL_PROCEDURE | |
6924 | && !module_ns->proc_name->attr.contained)) | |
060fca4a PT |
6925 | break; |
6926 | ||
6927 | if (module_ns == NULL) | |
6928 | return MATCH_ERROR; | |
6929 | ||
2b77e908 FXC |
6930 | /* Store the current state of the interface. We will need it if we |
6931 | end up with a syntax error and need to recover. */ | |
6932 | old_interface_head = gfc_current_interface_head (); | |
6933 | ||
6de9cd9a DN |
6934 | for (;;) |
6935 | { | |
43dfd40c | 6936 | locus old_locus = gfc_current_locus; |
2b77e908 FXC |
6937 | bool last = false; |
6938 | ||
6de9cd9a DN |
6939 | m = gfc_match_name (name); |
6940 | if (m == MATCH_NO) | |
6941 | goto syntax; | |
6942 | if (m != MATCH_YES) | |
6943 | return MATCH_ERROR; | |
6944 | ||
2b77e908 FXC |
6945 | /* Check for syntax error before starting to add symbols to the |
6946 | current namespace. */ | |
6947 | if (gfc_match_eos () == MATCH_YES) | |
6948 | last = true; | |
6949 | if (!last && gfc_match_char (',') != MATCH_YES) | |
6950 | goto syntax; | |
6951 | ||
6952 | /* Now we're sure the syntax is valid, we process this item | |
6953 | further. */ | |
060fca4a | 6954 | if (gfc_get_symbol (name, module_ns, &sym)) |
6de9cd9a DN |
6955 | return MATCH_ERROR; |
6956 | ||
43dfd40c SK |
6957 | if (sym->attr.intrinsic) |
6958 | { | |
6959 | gfc_error ("Intrinsic procedure at %L cannot be a MODULE " | |
6960 | "PROCEDURE", &old_locus); | |
6961 | return MATCH_ERROR; | |
6962 | } | |
6963 | ||
6de9cd9a | 6964 | if (sym->attr.proc != PROC_MODULE |
231b2fcc TS |
6965 | && gfc_add_procedure (&sym->attr, PROC_MODULE, |
6966 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
6967 | return MATCH_ERROR; |
6968 | ||
6969 | if (gfc_add_interface (sym) == FAILURE) | |
6970 | return MATCH_ERROR; | |
6971 | ||
71f77fd7 | 6972 | sym->attr.mod_proc = 1; |
43dfd40c | 6973 | sym->declared_at = old_locus; |
71f77fd7 | 6974 | |
2b77e908 | 6975 | if (last) |
6de9cd9a | 6976 | break; |
6de9cd9a DN |
6977 | } |
6978 | ||
6979 | return MATCH_YES; | |
6980 | ||
6981 | syntax: | |
2b77e908 FXC |
6982 | /* Restore the previous state of the interface. */ |
6983 | interface = gfc_current_interface_head (); | |
6984 | gfc_set_current_interface_head (old_interface_head); | |
6985 | ||
6986 | /* Free the new interfaces. */ | |
6987 | while (interface != old_interface_head) | |
6988 | { | |
6989 | gfc_interface *i = interface->next; | |
6990 | gfc_free (interface); | |
6991 | interface = i; | |
6992 | } | |
6993 | ||
6994 | /* And issue a syntax error. */ | |
6de9cd9a DN |
6995 | gfc_syntax_error (ST_MODULE_PROC); |
6996 | return MATCH_ERROR; | |
6997 | } | |
6998 | ||
6999 | ||
7d1f1e61 PT |
7000 | /* Check a derived type that is being extended. */ |
7001 | static gfc_symbol* | |
7002 | check_extended_derived_type (char *name) | |
7003 | { | |
7004 | gfc_symbol *extended; | |
7005 | ||
7006 | if (gfc_find_symbol (name, gfc_current_ns, 1, &extended)) | |
7007 | { | |
7008 | gfc_error ("Ambiguous symbol in TYPE definition at %C"); | |
7009 | return NULL; | |
7010 | } | |
7011 | ||
7012 | if (!extended) | |
7013 | { | |
7014 | gfc_error ("No such symbol in TYPE definition at %C"); | |
7015 | return NULL; | |
7016 | } | |
7017 | ||
7018 | if (extended->attr.flavor != FL_DERIVED) | |
7019 | { | |
7020 | gfc_error ("'%s' in EXTENDS expression at %C is not a " | |
7021 | "derived type", name); | |
7022 | return NULL; | |
7023 | } | |
7024 | ||
7025 | if (extended->attr.is_bind_c) | |
7026 | { | |
7027 | gfc_error ("'%s' cannot be extended at %C because it " | |
7028 | "is BIND(C)", extended->name); | |
7029 | return NULL; | |
7030 | } | |
7031 | ||
7032 | if (extended->attr.sequence) | |
7033 | { | |
7034 | gfc_error ("'%s' cannot be extended at %C because it " | |
7035 | "is a SEQUENCE type", extended->name); | |
7036 | return NULL; | |
7037 | } | |
7038 | ||
7039 | return extended; | |
7040 | } | |
7041 | ||
7042 | ||
a8b3b0b6 CR |
7043 | /* Match the optional attribute specifiers for a type declaration. |
7044 | Return MATCH_ERROR if an error is encountered in one of the handled | |
7045 | attributes (public, private, bind(c)), MATCH_NO if what's found is | |
7046 | not a handled attribute, and MATCH_YES otherwise. TODO: More error | |
7047 | checking on attribute conflicts needs to be done. */ | |
6de9cd9a DN |
7048 | |
7049 | match | |
7d1f1e61 | 7050 | gfc_get_type_attr_spec (symbol_attribute *attr, char *name) |
6de9cd9a | 7051 | { |
a8b3b0b6 | 7052 | /* See if the derived type is marked as private. */ |
6de9cd9a DN |
7053 | if (gfc_match (" , private") == MATCH_YES) |
7054 | { | |
d51347f9 | 7055 | if (gfc_current_state () != COMP_MODULE) |
6de9cd9a | 7056 | { |
d51347f9 TB |
7057 | gfc_error ("Derived type at %C can only be PRIVATE in the " |
7058 | "specification part of a module"); | |
6de9cd9a DN |
7059 | return MATCH_ERROR; |
7060 | } | |
7061 | ||
a8b3b0b6 | 7062 | if (gfc_add_access (attr, ACCESS_PRIVATE, NULL, NULL) == FAILURE) |
6de9cd9a | 7063 | return MATCH_ERROR; |
6de9cd9a | 7064 | } |
a8b3b0b6 | 7065 | else if (gfc_match (" , public") == MATCH_YES) |
6de9cd9a | 7066 | { |
d51347f9 | 7067 | if (gfc_current_state () != COMP_MODULE) |
6de9cd9a | 7068 | { |
d51347f9 TB |
7069 | gfc_error ("Derived type at %C can only be PUBLIC in the " |
7070 | "specification part of a module"); | |
6de9cd9a DN |
7071 | return MATCH_ERROR; |
7072 | } | |
7073 | ||
a8b3b0b6 | 7074 | if (gfc_add_access (attr, ACCESS_PUBLIC, NULL, NULL) == FAILURE) |
6de9cd9a | 7075 | return MATCH_ERROR; |
6de9cd9a | 7076 | } |
52f49934 | 7077 | else if (gfc_match (" , bind ( c )") == MATCH_YES) |
a8b3b0b6 CR |
7078 | { |
7079 | /* If the type is defined to be bind(c) it then needs to make | |
7080 | sure that all fields are interoperable. This will | |
7081 | need to be a semantic check on the finished derived type. | |
7082 | See 15.2.3 (lines 9-12) of F2003 draft. */ | |
7083 | if (gfc_add_is_bind_c (attr, NULL, &gfc_current_locus, 0) != SUCCESS) | |
7084 | return MATCH_ERROR; | |
7085 | ||
7086 | /* TODO: attr conflicts need to be checked, probably in symbol.c. */ | |
7087 | } | |
52f49934 DK |
7088 | else if (gfc_match (" , abstract") == MATCH_YES) |
7089 | { | |
7090 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ABSTRACT type at %C") | |
7091 | == FAILURE) | |
7092 | return MATCH_ERROR; | |
7093 | ||
7094 | if (gfc_add_abstract (attr, &gfc_current_locus) == FAILURE) | |
7095 | return MATCH_ERROR; | |
7096 | } | |
7d1f1e61 PT |
7097 | else if (name && gfc_match(" , extends ( %n )", name) == MATCH_YES) |
7098 | { | |
63a3341a | 7099 | if (gfc_add_extension (attr, &gfc_current_locus) == FAILURE) |
7d1f1e61 PT |
7100 | return MATCH_ERROR; |
7101 | } | |
a8b3b0b6 CR |
7102 | else |
7103 | return MATCH_NO; | |
7104 | ||
7105 | /* If we get here, something matched. */ | |
7106 | return MATCH_YES; | |
7107 | } | |
7108 | ||
7109 | ||
a14ce128 PT |
7110 | /* Assign a hash value for a derived type. The algorithm is that of |
7111 | SDBM. The hashed string is '[module_name #] derived_name'. */ | |
7112 | static unsigned int | |
7113 | hash_value (gfc_symbol *sym) | |
7114 | { | |
7115 | unsigned int hash = 0; | |
7116 | const char *c; | |
7117 | int i, len; | |
7118 | ||
7119 | /* Hash of the module or procedure name. */ | |
7120 | if (sym->module != NULL) | |
7121 | c = sym->module; | |
7122 | else if (sym->ns && sym->ns->proc_name | |
7123 | && sym->ns->proc_name->attr.flavor == FL_MODULE) | |
7124 | c = sym->ns->proc_name->name; | |
7125 | else | |
7126 | c = NULL; | |
7127 | ||
7128 | if (c) | |
7129 | { | |
7130 | len = strlen (c); | |
7131 | for (i = 0; i < len; i++, c++) | |
7132 | hash = (hash << 6) + (hash << 16) - hash + (*c); | |
7133 | ||
7134 | /* Disambiguate between 'a' in 'aa' and 'aa' in 'a'. */ | |
7135 | hash = (hash << 6) + (hash << 16) - hash + '#'; | |
7136 | } | |
7137 | ||
7138 | /* Hash of the derived type name. */ | |
7139 | len = strlen (sym->name); | |
7140 | c = sym->name; | |
7141 | for (i = 0; i < len; i++, c++) | |
7142 | hash = (hash << 6) + (hash << 16) - hash + (*c); | |
7143 | ||
7144 | /* Return the hash but take the modulus for the sake of module read, | |
7145 | even though this slightly increases the chance of collision. */ | |
7146 | return (hash % 100000000); | |
7147 | } | |
cf2b3c22 TB |
7148 | |
7149 | ||
a8b3b0b6 CR |
7150 | /* Match the beginning of a derived type declaration. If a type name |
7151 | was the result of a function, then it is possible to have a symbol | |
7152 | already to be known as a derived type yet have no components. */ | |
7153 | ||
7154 | match | |
7155 | gfc_match_derived_decl (void) | |
7156 | { | |
7157 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7d1f1e61 | 7158 | char parent[GFC_MAX_SYMBOL_LEN + 1]; |
a8b3b0b6 CR |
7159 | symbol_attribute attr; |
7160 | gfc_symbol *sym; | |
7d1f1e61 | 7161 | gfc_symbol *extended; |
a8b3b0b6 CR |
7162 | match m; |
7163 | match is_type_attr_spec = MATCH_NO; | |
e7303e85 | 7164 | bool seen_attr = false; |
a8b3b0b6 CR |
7165 | |
7166 | if (gfc_current_state () == COMP_DERIVED) | |
7167 | return MATCH_NO; | |
7168 | ||
7d1f1e61 PT |
7169 | name[0] = '\0'; |
7170 | parent[0] = '\0'; | |
a8b3b0b6 | 7171 | gfc_clear_attr (&attr); |
7d1f1e61 | 7172 | extended = NULL; |
a8b3b0b6 CR |
7173 | |
7174 | do | |
7175 | { | |
7d1f1e61 | 7176 | is_type_attr_spec = gfc_get_type_attr_spec (&attr, parent); |
a8b3b0b6 CR |
7177 | if (is_type_attr_spec == MATCH_ERROR) |
7178 | return MATCH_ERROR; | |
e7303e85 FXC |
7179 | if (is_type_attr_spec == MATCH_YES) |
7180 | seen_attr = true; | |
a8b3b0b6 | 7181 | } while (is_type_attr_spec == MATCH_YES); |
6de9cd9a | 7182 | |
63a3341a PT |
7183 | /* Deal with derived type extensions. The extension attribute has |
7184 | been added to 'attr' but now the parent type must be found and | |
7185 | checked. */ | |
7d1f1e61 PT |
7186 | if (parent[0]) |
7187 | extended = check_extended_derived_type (parent); | |
7188 | ||
7189 | if (parent[0] && !extended) | |
7190 | return MATCH_ERROR; | |
7191 | ||
e7303e85 | 7192 | if (gfc_match (" ::") != MATCH_YES && seen_attr) |
6de9cd9a DN |
7193 | { |
7194 | gfc_error ("Expected :: in TYPE definition at %C"); | |
7195 | return MATCH_ERROR; | |
7196 | } | |
7197 | ||
7198 | m = gfc_match (" %n%t", name); | |
7199 | if (m != MATCH_YES) | |
7200 | return m; | |
7201 | ||
e9c06563 TB |
7202 | /* Make sure the name is not the name of an intrinsic type. */ |
7203 | if (gfc_is_intrinsic_typename (name)) | |
6de9cd9a | 7204 | { |
636dff67 SK |
7205 | gfc_error ("Type name '%s' at %C cannot be the same as an intrinsic " |
7206 | "type", name); | |
6de9cd9a DN |
7207 | return MATCH_ERROR; |
7208 | } | |
7209 | ||
7210 | if (gfc_get_symbol (name, NULL, &sym)) | |
7211 | return MATCH_ERROR; | |
7212 | ||
7213 | if (sym->ts.type != BT_UNKNOWN) | |
7214 | { | |
7215 | gfc_error ("Derived type name '%s' at %C already has a basic type " | |
7216 | "of %s", sym->name, gfc_typename (&sym->ts)); | |
7217 | return MATCH_ERROR; | |
7218 | } | |
7219 | ||
7220 | /* The symbol may already have the derived attribute without the | |
7221 | components. The ways this can happen is via a function | |
7222 | definition, an INTRINSIC statement or a subtype in another | |
7223 | derived type that is a pointer. The first part of the AND clause | |
df2fba9e | 7224 | is true if the symbol is not the return value of a function. */ |
6de9cd9a | 7225 | if (sym->attr.flavor != FL_DERIVED |
231b2fcc | 7226 | && gfc_add_flavor (&sym->attr, FL_DERIVED, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
7227 | return MATCH_ERROR; |
7228 | ||
9fa6b0af | 7229 | if (sym->components != NULL || sym->attr.zero_comp) |
6de9cd9a | 7230 | { |
636dff67 SK |
7231 | gfc_error ("Derived type definition of '%s' at %C has already been " |
7232 | "defined", sym->name); | |
6de9cd9a DN |
7233 | return MATCH_ERROR; |
7234 | } | |
7235 | ||
7236 | if (attr.access != ACCESS_UNKNOWN | |
231b2fcc | 7237 | && gfc_add_access (&sym->attr, attr.access, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
7238 | return MATCH_ERROR; |
7239 | ||
a8b3b0b6 CR |
7240 | /* See if the derived type was labeled as bind(c). */ |
7241 | if (attr.is_bind_c != 0) | |
7242 | sym->attr.is_bind_c = attr.is_bind_c; | |
7243 | ||
34523524 DK |
7244 | /* Construct the f2k_derived namespace if it is not yet there. */ |
7245 | if (!sym->f2k_derived) | |
7246 | sym->f2k_derived = gfc_get_namespace (NULL, 0); | |
7d1f1e61 PT |
7247 | |
7248 | if (extended && !sym->components) | |
7249 | { | |
7250 | gfc_component *p; | |
7251 | gfc_symtree *st; | |
7252 | ||
7253 | /* Add the extended derived type as the first component. */ | |
7254 | gfc_add_component (sym, parent, &p); | |
7d1f1e61 PT |
7255 | extended->refs++; |
7256 | gfc_set_sym_referenced (extended); | |
7257 | ||
7258 | p->ts.type = BT_DERIVED; | |
bc21d315 | 7259 | p->ts.u.derived = extended; |
7d1f1e61 | 7260 | p->initializer = gfc_default_initializer (&p->ts); |
7c1dab0d JW |
7261 | |
7262 | /* Set extension level. */ | |
7263 | if (extended->attr.extension == 255) | |
7264 | { | |
7265 | /* Since the extension field is 8 bit wide, we can only have | |
7266 | up to 255 extension levels. */ | |
7267 | gfc_error ("Maximum extension level reached with type '%s' at %L", | |
7268 | extended->name, &extended->declared_at); | |
7269 | return MATCH_ERROR; | |
7270 | } | |
7271 | sym->attr.extension = extended->attr.extension + 1; | |
7d1f1e61 PT |
7272 | |
7273 | /* Provide the links between the extended type and its extension. */ | |
7274 | if (!extended->f2k_derived) | |
7275 | extended->f2k_derived = gfc_get_namespace (NULL, 0); | |
7276 | st = gfc_new_symtree (&extended->f2k_derived->sym_root, sym->name); | |
7277 | st->n.sym = sym; | |
7278 | } | |
7279 | ||
7c1dab0d JW |
7280 | if (!sym->hash_value) |
7281 | /* Set the hash for the compound name for this type. */ | |
7282 | sym->hash_value = hash_value (sym); | |
cf2b3c22 | 7283 | |
52f49934 DK |
7284 | /* Take over the ABSTRACT attribute. */ |
7285 | sym->attr.abstract = attr.abstract; | |
7286 | ||
6de9cd9a DN |
7287 | gfc_new_block = sym; |
7288 | ||
7289 | return MATCH_YES; | |
7290 | } | |
83d890b9 AL |
7291 | |
7292 | ||
7293 | /* Cray Pointees can be declared as: | |
b3aefde2 | 7294 | pointer (ipt, a (n,m,...,*)) */ |
83d890b9 | 7295 | |
32e8bb8e | 7296 | match |
83d890b9 AL |
7297 | gfc_mod_pointee_as (gfc_array_spec *as) |
7298 | { | |
7299 | as->cray_pointee = true; /* This will be useful to know later. */ | |
7300 | if (as->type == AS_ASSUMED_SIZE) | |
b3aefde2 | 7301 | as->cp_was_assumed = true; |
83d890b9 AL |
7302 | else if (as->type == AS_ASSUMED_SHAPE) |
7303 | { | |
7304 | gfc_error ("Cray Pointee at %C cannot be assumed shape array"); | |
7305 | return MATCH_ERROR; | |
7306 | } | |
7307 | return MATCH_YES; | |
7308 | } | |
25d8f0a2 TS |
7309 | |
7310 | ||
7311 | /* Match the enum definition statement, here we are trying to match | |
7312 | the first line of enum definition statement. | |
7313 | Returns MATCH_YES if match is found. */ | |
7314 | ||
7315 | match | |
7316 | gfc_match_enum (void) | |
7317 | { | |
7318 | match m; | |
7319 | ||
7320 | m = gfc_match_eos (); | |
7321 | if (m != MATCH_YES) | |
7322 | return m; | |
7323 | ||
6133c68a | 7324 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ENUM and ENUMERATOR at %C") |
25d8f0a2 TS |
7325 | == FAILURE) |
7326 | return MATCH_ERROR; | |
7327 | ||
7328 | return MATCH_YES; | |
7329 | } | |
7330 | ||
7331 | ||
31224396 SK |
7332 | /* Returns an initializer whose value is one higher than the value of the |
7333 | LAST_INITIALIZER argument. If the argument is NULL, the | |
7334 | initializers value will be set to zero. The initializer's kind | |
7335 | will be set to gfc_c_int_kind. | |
7336 | ||
7337 | If -fshort-enums is given, the appropriate kind will be selected | |
7338 | later after all enumerators have been parsed. A warning is issued | |
7339 | here if an initializer exceeds gfc_c_int_kind. */ | |
7340 | ||
7341 | static gfc_expr * | |
7342 | enum_initializer (gfc_expr *last_initializer, locus where) | |
7343 | { | |
7344 | gfc_expr *result; | |
b7e75771 | 7345 | result = gfc_get_constant_expr (BT_INTEGER, gfc_c_int_kind, &where); |
31224396 SK |
7346 | |
7347 | mpz_init (result->value.integer); | |
7348 | ||
7349 | if (last_initializer != NULL) | |
7350 | { | |
7351 | mpz_add_ui (result->value.integer, last_initializer->value.integer, 1); | |
7352 | result->where = last_initializer->where; | |
7353 | ||
7354 | if (gfc_check_integer_range (result->value.integer, | |
7355 | gfc_c_int_kind) != ARITH_OK) | |
7356 | { | |
7357 | gfc_error ("Enumerator exceeds the C integer type at %C"); | |
7358 | return NULL; | |
7359 | } | |
7360 | } | |
7361 | else | |
7362 | { | |
7363 | /* Control comes here, if it's the very first enumerator and no | |
7364 | initializer has been given. It will be initialized to zero. */ | |
7365 | mpz_set_si (result->value.integer, 0); | |
7366 | } | |
7367 | ||
7368 | return result; | |
7369 | } | |
7370 | ||
7371 | ||
6133c68a TS |
7372 | /* Match a variable name with an optional initializer. When this |
7373 | subroutine is called, a variable is expected to be parsed next. | |
7374 | Depending on what is happening at the moment, updates either the | |
7375 | symbol table or the current interface. */ | |
7376 | ||
7377 | static match | |
7378 | enumerator_decl (void) | |
7379 | { | |
7380 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7381 | gfc_expr *initializer; | |
7382 | gfc_array_spec *as = NULL; | |
7383 | gfc_symbol *sym; | |
7384 | locus var_locus; | |
7385 | match m; | |
17b1d2a0 | 7386 | gfc_try t; |
6133c68a TS |
7387 | locus old_locus; |
7388 | ||
7389 | initializer = NULL; | |
7390 | old_locus = gfc_current_locus; | |
7391 | ||
7392 | /* When we get here, we've just matched a list of attributes and | |
7393 | maybe a type and a double colon. The next thing we expect to see | |
7394 | is the name of the symbol. */ | |
7395 | m = gfc_match_name (name); | |
7396 | if (m != MATCH_YES) | |
7397 | goto cleanup; | |
7398 | ||
7399 | var_locus = gfc_current_locus; | |
7400 | ||
7401 | /* OK, we've successfully matched the declaration. Now put the | |
7402 | symbol in the current namespace. If we fail to create the symbol, | |
7403 | bail out. */ | |
7404 | if (build_sym (name, NULL, &as, &var_locus) == FAILURE) | |
7405 | { | |
7406 | m = MATCH_ERROR; | |
7407 | goto cleanup; | |
7408 | } | |
7409 | ||
7410 | /* The double colon must be present in order to have initializers. | |
7411 | Otherwise the statement is ambiguous with an assignment statement. */ | |
7412 | if (colon_seen) | |
7413 | { | |
7414 | if (gfc_match_char ('=') == MATCH_YES) | |
7415 | { | |
7416 | m = gfc_match_init_expr (&initializer); | |
7417 | if (m == MATCH_NO) | |
7418 | { | |
7419 | gfc_error ("Expected an initialization expression at %C"); | |
7420 | m = MATCH_ERROR; | |
7421 | } | |
7422 | ||
7423 | if (m != MATCH_YES) | |
7424 | goto cleanup; | |
7425 | } | |
7426 | } | |
7427 | ||
7428 | /* If we do not have an initializer, the initialization value of the | |
7429 | previous enumerator (stored in last_initializer) is incremented | |
7430 | by 1 and is used to initialize the current enumerator. */ | |
7431 | if (initializer == NULL) | |
31224396 | 7432 | initializer = enum_initializer (last_initializer, old_locus); |
d51347f9 | 7433 | |
6133c68a TS |
7434 | if (initializer == NULL || initializer->ts.type != BT_INTEGER) |
7435 | { | |
01e64c3d JJ |
7436 | gfc_error ("ENUMERATOR %L not initialized with integer expression", |
7437 | &var_locus); | |
d51347f9 | 7438 | m = MATCH_ERROR; |
6133c68a TS |
7439 | goto cleanup; |
7440 | } | |
7441 | ||
7442 | /* Store this current initializer, for the next enumerator variable | |
7443 | to be parsed. add_init_expr_to_sym() zeros initializer, so we | |
7444 | use last_initializer below. */ | |
7445 | last_initializer = initializer; | |
7446 | t = add_init_expr_to_sym (name, &initializer, &var_locus); | |
7447 | ||
7448 | /* Maintain enumerator history. */ | |
7449 | gfc_find_symbol (name, NULL, 0, &sym); | |
7450 | create_enum_history (sym, last_initializer); | |
7451 | ||
7452 | return (t == SUCCESS) ? MATCH_YES : MATCH_ERROR; | |
7453 | ||
7454 | cleanup: | |
7455 | /* Free stuff up and return. */ | |
7456 | gfc_free_expr (initializer); | |
7457 | ||
7458 | return m; | |
7459 | } | |
7460 | ||
7461 | ||
66e4ab31 | 7462 | /* Match the enumerator definition statement. */ |
25d8f0a2 TS |
7463 | |
7464 | match | |
7465 | gfc_match_enumerator_def (void) | |
7466 | { | |
7467 | match m; | |
17b1d2a0 | 7468 | gfc_try t; |
d51347f9 | 7469 | |
25d8f0a2 | 7470 | gfc_clear_ts (¤t_ts); |
d51347f9 | 7471 | |
25d8f0a2 TS |
7472 | m = gfc_match (" enumerator"); |
7473 | if (m != MATCH_YES) | |
7474 | return m; | |
6133c68a TS |
7475 | |
7476 | m = gfc_match (" :: "); | |
7477 | if (m == MATCH_ERROR) | |
7478 | return m; | |
7479 | ||
7480 | colon_seen = (m == MATCH_YES); | |
d51347f9 | 7481 | |
25d8f0a2 TS |
7482 | if (gfc_current_state () != COMP_ENUM) |
7483 | { | |
7484 | gfc_error ("ENUM definition statement expected before %C"); | |
7485 | gfc_free_enum_history (); | |
7486 | return MATCH_ERROR; | |
7487 | } | |
7488 | ||
7489 | (¤t_ts)->type = BT_INTEGER; | |
7490 | (¤t_ts)->kind = gfc_c_int_kind; | |
d51347f9 | 7491 | |
6133c68a TS |
7492 | gfc_clear_attr (¤t_attr); |
7493 | t = gfc_add_flavor (¤t_attr, FL_PARAMETER, NULL, NULL); | |
7494 | if (t == FAILURE) | |
25d8f0a2 | 7495 | { |
6133c68a | 7496 | m = MATCH_ERROR; |
25d8f0a2 TS |
7497 | goto cleanup; |
7498 | } | |
7499 | ||
25d8f0a2 TS |
7500 | for (;;) |
7501 | { | |
6133c68a | 7502 | m = enumerator_decl (); |
25d8f0a2 | 7503 | if (m == MATCH_ERROR) |
01e64c3d JJ |
7504 | { |
7505 | gfc_free_enum_history (); | |
7506 | goto cleanup; | |
7507 | } | |
25d8f0a2 TS |
7508 | if (m == MATCH_NO) |
7509 | break; | |
7510 | ||
7511 | if (gfc_match_eos () == MATCH_YES) | |
7512 | goto cleanup; | |
7513 | if (gfc_match_char (',') != MATCH_YES) | |
7514 | break; | |
7515 | } | |
7516 | ||
7517 | if (gfc_current_state () == COMP_ENUM) | |
7518 | { | |
7519 | gfc_free_enum_history (); | |
7520 | gfc_error ("Syntax error in ENUMERATOR definition at %C"); | |
7521 | m = MATCH_ERROR; | |
7522 | } | |
7523 | ||
7524 | cleanup: | |
7525 | gfc_free_array_spec (current_as); | |
7526 | current_as = NULL; | |
7527 | return m; | |
7528 | ||
7529 | } | |
7530 | ||
f6fad28e | 7531 | |
30b608eb DK |
7532 | /* Match binding attributes. */ |
7533 | ||
7534 | static match | |
713485cc | 7535 | match_binding_attributes (gfc_typebound_proc* ba, bool generic, bool ppc) |
30b608eb DK |
7536 | { |
7537 | bool found_passing = false; | |
713485cc | 7538 | bool seen_ptr = false; |
90661f26 | 7539 | match m = MATCH_YES; |
30b608eb DK |
7540 | |
7541 | /* Intialize to defaults. Do so even before the MATCH_NO check so that in | |
7542 | this case the defaults are in there. */ | |
7543 | ba->access = ACCESS_UNKNOWN; | |
7544 | ba->pass_arg = NULL; | |
7545 | ba->pass_arg_num = 0; | |
7546 | ba->nopass = 0; | |
7547 | ba->non_overridable = 0; | |
b0e5fa94 | 7548 | ba->deferred = 0; |
90661f26 | 7549 | ba->ppc = ppc; |
30b608eb DK |
7550 | |
7551 | /* If we find a comma, we believe there are binding attributes. */ | |
90661f26 JW |
7552 | m = gfc_match_char (','); |
7553 | if (m == MATCH_NO) | |
7554 | goto done; | |
30b608eb DK |
7555 | |
7556 | do | |
7557 | { | |
e157f736 DK |
7558 | /* Access specifier. */ |
7559 | ||
7560 | m = gfc_match (" public"); | |
30b608eb DK |
7561 | if (m == MATCH_ERROR) |
7562 | goto error; | |
7563 | if (m == MATCH_YES) | |
7564 | { | |
e157f736 | 7565 | if (ba->access != ACCESS_UNKNOWN) |
30b608eb | 7566 | { |
e157f736 | 7567 | gfc_error ("Duplicate access-specifier at %C"); |
30b608eb DK |
7568 | goto error; |
7569 | } | |
7570 | ||
e157f736 | 7571 | ba->access = ACCESS_PUBLIC; |
30b608eb DK |
7572 | continue; |
7573 | } | |
7574 | ||
e157f736 | 7575 | m = gfc_match (" private"); |
30b608eb DK |
7576 | if (m == MATCH_ERROR) |
7577 | goto error; | |
7578 | if (m == MATCH_YES) | |
7579 | { | |
e157f736 | 7580 | if (ba->access != ACCESS_UNKNOWN) |
30b608eb | 7581 | { |
e157f736 | 7582 | gfc_error ("Duplicate access-specifier at %C"); |
30b608eb DK |
7583 | goto error; |
7584 | } | |
7585 | ||
e157f736 | 7586 | ba->access = ACCESS_PRIVATE; |
30b608eb DK |
7587 | continue; |
7588 | } | |
7589 | ||
e157f736 DK |
7590 | /* If inside GENERIC, the following is not allowed. */ |
7591 | if (!generic) | |
30b608eb | 7592 | { |
30b608eb | 7593 | |
e157f736 DK |
7594 | /* NOPASS flag. */ |
7595 | m = gfc_match (" nopass"); | |
7596 | if (m == MATCH_ERROR) | |
7597 | goto error; | |
7598 | if (m == MATCH_YES) | |
30b608eb | 7599 | { |
e157f736 DK |
7600 | if (found_passing) |
7601 | { | |
7602 | gfc_error ("Binding attributes already specify passing," | |
7603 | " illegal NOPASS at %C"); | |
7604 | goto error; | |
7605 | } | |
7606 | ||
7607 | found_passing = true; | |
7608 | ba->nopass = 1; | |
7609 | continue; | |
30b608eb DK |
7610 | } |
7611 | ||
e157f736 DK |
7612 | /* PASS possibly including argument. */ |
7613 | m = gfc_match (" pass"); | |
7614 | if (m == MATCH_ERROR) | |
7615 | goto error; | |
7616 | if (m == MATCH_YES) | |
30b608eb | 7617 | { |
e157f736 DK |
7618 | char arg[GFC_MAX_SYMBOL_LEN + 1]; |
7619 | ||
7620 | if (found_passing) | |
7621 | { | |
7622 | gfc_error ("Binding attributes already specify passing," | |
7623 | " illegal PASS at %C"); | |
7624 | goto error; | |
7625 | } | |
7626 | ||
7627 | m = gfc_match (" ( %n )", arg); | |
7628 | if (m == MATCH_ERROR) | |
7629 | goto error; | |
7630 | if (m == MATCH_YES) | |
90661f26 | 7631 | ba->pass_arg = gfc_get_string (arg); |
e157f736 DK |
7632 | gcc_assert ((m == MATCH_YES) == (ba->pass_arg != NULL)); |
7633 | ||
7634 | found_passing = true; | |
7635 | ba->nopass = 0; | |
7636 | continue; | |
30b608eb DK |
7637 | } |
7638 | ||
713485cc JW |
7639 | if (ppc) |
7640 | { | |
7641 | /* POINTER flag. */ | |
7642 | m = gfc_match (" pointer"); | |
7643 | if (m == MATCH_ERROR) | |
7644 | goto error; | |
7645 | if (m == MATCH_YES) | |
7646 | { | |
7647 | if (seen_ptr) | |
7648 | { | |
7649 | gfc_error ("Duplicate POINTER attribute at %C"); | |
7650 | goto error; | |
7651 | } | |
7652 | ||
7653 | seen_ptr = true; | |
713485cc JW |
7654 | continue; |
7655 | } | |
7656 | } | |
7657 | else | |
7658 | { | |
7659 | /* NON_OVERRIDABLE flag. */ | |
7660 | m = gfc_match (" non_overridable"); | |
7661 | if (m == MATCH_ERROR) | |
7662 | goto error; | |
7663 | if (m == MATCH_YES) | |
7664 | { | |
7665 | if (ba->non_overridable) | |
7666 | { | |
7667 | gfc_error ("Duplicate NON_OVERRIDABLE at %C"); | |
7668 | goto error; | |
7669 | } | |
7670 | ||
7671 | ba->non_overridable = 1; | |
7672 | continue; | |
7673 | } | |
7674 | ||
7675 | /* DEFERRED flag. */ | |
7676 | m = gfc_match (" deferred"); | |
7677 | if (m == MATCH_ERROR) | |
7678 | goto error; | |
7679 | if (m == MATCH_YES) | |
7680 | { | |
7681 | if (ba->deferred) | |
7682 | { | |
7683 | gfc_error ("Duplicate DEFERRED at %C"); | |
7684 | goto error; | |
7685 | } | |
7686 | ||
7687 | ba->deferred = 1; | |
7688 | continue; | |
7689 | } | |
7690 | } | |
7691 | ||
30b608eb DK |
7692 | } |
7693 | ||
7694 | /* Nothing matching found. */ | |
e157f736 DK |
7695 | if (generic) |
7696 | gfc_error ("Expected access-specifier at %C"); | |
7697 | else | |
7698 | gfc_error ("Expected binding attribute at %C"); | |
30b608eb DK |
7699 | goto error; |
7700 | } | |
7701 | while (gfc_match_char (',') == MATCH_YES); | |
7702 | ||
b0e5fa94 DK |
7703 | /* NON_OVERRIDABLE and DEFERRED exclude themselves. */ |
7704 | if (ba->non_overridable && ba->deferred) | |
7705 | { | |
7706 | gfc_error ("NON_OVERRIDABLE and DEFERRED can't both appear at %C"); | |
7707 | goto error; | |
7708 | } | |
7709 | ||
90661f26 JW |
7710 | m = MATCH_YES; |
7711 | ||
7712 | done: | |
e157f736 DK |
7713 | if (ba->access == ACCESS_UNKNOWN) |
7714 | ba->access = gfc_typebound_default_access; | |
7715 | ||
713485cc JW |
7716 | if (ppc && !seen_ptr) |
7717 | { | |
7718 | gfc_error ("POINTER attribute is required for procedure pointer component" | |
7719 | " at %C"); | |
7720 | goto error; | |
7721 | } | |
7722 | ||
90661f26 | 7723 | return m; |
30b608eb DK |
7724 | |
7725 | error: | |
30b608eb DK |
7726 | return MATCH_ERROR; |
7727 | } | |
7728 | ||
7729 | ||
7730 | /* Match a PROCEDURE specific binding inside a derived type. */ | |
7731 | ||
7732 | static match | |
7733 | match_procedure_in_type (void) | |
7734 | { | |
7735 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
7736 | char target_buf[GFC_MAX_SYMBOL_LEN + 1]; | |
1be17993 | 7737 | char* target = NULL, *ifc = NULL; |
3e15518b | 7738 | gfc_typebound_proc tb; |
30b608eb DK |
7739 | bool seen_colons; |
7740 | bool seen_attrs; | |
7741 | match m; | |
7742 | gfc_symtree* stree; | |
7743 | gfc_namespace* ns; | |
7744 | gfc_symbol* block; | |
1be17993 | 7745 | int num; |
30b608eb DK |
7746 | |
7747 | /* Check current state. */ | |
7748 | gcc_assert (gfc_state_stack->state == COMP_DERIVED_CONTAINS); | |
7749 | block = gfc_state_stack->previous->sym; | |
7750 | gcc_assert (block); | |
7751 | ||
b0e5fa94 | 7752 | /* Try to match PROCEDURE(interface). */ |
30b608eb DK |
7753 | if (gfc_match (" (") == MATCH_YES) |
7754 | { | |
b0e5fa94 DK |
7755 | m = gfc_match_name (target_buf); |
7756 | if (m == MATCH_ERROR) | |
7757 | return m; | |
7758 | if (m != MATCH_YES) | |
7759 | { | |
7760 | gfc_error ("Interface-name expected after '(' at %C"); | |
7761 | return MATCH_ERROR; | |
7762 | } | |
7763 | ||
7764 | if (gfc_match (" )") != MATCH_YES) | |
7765 | { | |
7766 | gfc_error ("')' expected at %C"); | |
7767 | return MATCH_ERROR; | |
7768 | } | |
7769 | ||
1be17993 | 7770 | ifc = target_buf; |
30b608eb DK |
7771 | } |
7772 | ||
7773 | /* Construct the data structure. */ | |
ff5b6492 | 7774 | memset (&tb, 0, sizeof (tb)); |
3e15518b | 7775 | tb.where = gfc_current_locus; |
30b608eb DK |
7776 | |
7777 | /* Match binding attributes. */ | |
3e15518b | 7778 | m = match_binding_attributes (&tb, false, false); |
30b608eb DK |
7779 | if (m == MATCH_ERROR) |
7780 | return m; | |
7781 | seen_attrs = (m == MATCH_YES); | |
7782 | ||
1be17993 | 7783 | /* Check that attribute DEFERRED is given if an interface is specified. */ |
3e15518b | 7784 | if (tb.deferred && !ifc) |
b0e5fa94 DK |
7785 | { |
7786 | gfc_error ("Interface must be specified for DEFERRED binding at %C"); | |
7787 | return MATCH_ERROR; | |
7788 | } | |
3e15518b | 7789 | if (ifc && !tb.deferred) |
b0e5fa94 DK |
7790 | { |
7791 | gfc_error ("PROCEDURE(interface) at %C should be declared DEFERRED"); | |
7792 | return MATCH_ERROR; | |
7793 | } | |
7794 | ||
30b608eb DK |
7795 | /* Match the colons. */ |
7796 | m = gfc_match (" ::"); | |
7797 | if (m == MATCH_ERROR) | |
7798 | return m; | |
7799 | seen_colons = (m == MATCH_YES); | |
7800 | if (seen_attrs && !seen_colons) | |
7801 | { | |
7802 | gfc_error ("Expected '::' after binding-attributes at %C"); | |
7803 | return MATCH_ERROR; | |
7804 | } | |
7805 | ||
1be17993 JW |
7806 | /* Match the binding names. */ |
7807 | for(num=1;;num++) | |
30b608eb | 7808 | { |
1be17993 JW |
7809 | m = gfc_match_name (name); |
7810 | if (m == MATCH_ERROR) | |
7811 | return m; | |
7812 | if (m == MATCH_NO) | |
b0e5fa94 | 7813 | { |
1be17993 | 7814 | gfc_error ("Expected binding name at %C"); |
b0e5fa94 DK |
7815 | return MATCH_ERROR; |
7816 | } | |
7817 | ||
1be17993 JW |
7818 | if (num>1 && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: PROCEDURE list" |
7819 | " at %C") == FAILURE) | |
7820 | return MATCH_ERROR; | |
30b608eb | 7821 | |
1be17993 JW |
7822 | /* Try to match the '=> target', if it's there. */ |
7823 | target = ifc; | |
7824 | m = gfc_match (" =>"); | |
30b608eb DK |
7825 | if (m == MATCH_ERROR) |
7826 | return m; | |
1be17993 | 7827 | if (m == MATCH_YES) |
30b608eb | 7828 | { |
3e15518b | 7829 | if (tb.deferred) |
1be17993 JW |
7830 | { |
7831 | gfc_error ("'=> target' is invalid for DEFERRED binding at %C"); | |
7832 | return MATCH_ERROR; | |
7833 | } | |
7834 | ||
7835 | if (!seen_colons) | |
7836 | { | |
7837 | gfc_error ("'::' needed in PROCEDURE binding with explicit target" | |
7838 | " at %C"); | |
7839 | return MATCH_ERROR; | |
7840 | } | |
7841 | ||
7842 | m = gfc_match_name (target_buf); | |
7843 | if (m == MATCH_ERROR) | |
7844 | return m; | |
7845 | if (m == MATCH_NO) | |
7846 | { | |
7847 | gfc_error ("Expected binding target after '=>' at %C"); | |
7848 | return MATCH_ERROR; | |
7849 | } | |
7850 | target = target_buf; | |
30b608eb | 7851 | } |
30b608eb | 7852 | |
1be17993 JW |
7853 | /* If no target was found, it has the same name as the binding. */ |
7854 | if (!target) | |
7855 | target = name; | |
30b608eb | 7856 | |
1be17993 JW |
7857 | /* Get the namespace to insert the symbols into. */ |
7858 | ns = block->f2k_derived; | |
7859 | gcc_assert (ns); | |
30b608eb | 7860 | |
1be17993 | 7861 | /* If the binding is DEFERRED, check that the containing type is ABSTRACT. */ |
3e15518b | 7862 | if (tb.deferred && !block->attr.abstract) |
1be17993 JW |
7863 | { |
7864 | gfc_error ("Type '%s' containing DEFERRED binding at %C " | |
7865 | "is not ABSTRACT", block->name); | |
7866 | return MATCH_ERROR; | |
7867 | } | |
30b608eb | 7868 | |
1be17993 JW |
7869 | /* See if we already have a binding with this name in the symtree which |
7870 | would be an error. If a GENERIC already targetted this binding, it may | |
7871 | be already there but then typebound is still NULL. */ | |
7872 | stree = gfc_find_symtree (ns->tb_sym_root, name); | |
7873 | if (stree && stree->n.tb) | |
7874 | { | |
7875 | gfc_error ("There is already a procedure with binding name '%s' for " | |
7876 | "the derived type '%s' at %C", name, block->name); | |
7877 | return MATCH_ERROR; | |
7878 | } | |
b0e5fa94 | 7879 | |
1be17993 | 7880 | /* Insert it and set attributes. */ |
30b608eb | 7881 | |
1be17993 JW |
7882 | if (!stree) |
7883 | { | |
7884 | stree = gfc_new_symtree (&ns->tb_sym_root, name); | |
7885 | gcc_assert (stree); | |
7886 | } | |
3e15518b | 7887 | stree->n.tb = gfc_get_typebound_proc (&tb); |
e34ccb4c | 7888 | |
3e15518b JW |
7889 | if (gfc_get_sym_tree (target, gfc_current_ns, &stree->n.tb->u.specific, |
7890 | false)) | |
1be17993 | 7891 | return MATCH_ERROR; |
3e15518b | 7892 | gfc_set_sym_referenced (stree->n.tb->u.specific->n.sym); |
1be17993 JW |
7893 | |
7894 | if (gfc_match_eos () == MATCH_YES) | |
7895 | return MATCH_YES; | |
7896 | if (gfc_match_char (',') != MATCH_YES) | |
7897 | goto syntax; | |
e34ccb4c | 7898 | } |
30b608eb | 7899 | |
1be17993 JW |
7900 | syntax: |
7901 | gfc_error ("Syntax error in PROCEDURE statement at %C"); | |
7902 | return MATCH_ERROR; | |
30b608eb DK |
7903 | } |
7904 | ||
7905 | ||
e157f736 DK |
7906 | /* Match a GENERIC procedure binding inside a derived type. */ |
7907 | ||
7908 | match | |
7909 | gfc_match_generic (void) | |
7910 | { | |
7911 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
94747289 | 7912 | char bind_name[GFC_MAX_SYMBOL_LEN + 16]; /* Allow space for OPERATOR(...). */ |
e157f736 DK |
7913 | gfc_symbol* block; |
7914 | gfc_typebound_proc tbattr; /* Used for match_binding_attributes. */ | |
7915 | gfc_typebound_proc* tb; | |
e157f736 | 7916 | gfc_namespace* ns; |
94747289 DK |
7917 | interface_type op_type; |
7918 | gfc_intrinsic_op op; | |
e157f736 DK |
7919 | match m; |
7920 | ||
7921 | /* Check current state. */ | |
7922 | if (gfc_current_state () == COMP_DERIVED) | |
7923 | { | |
7924 | gfc_error ("GENERIC at %C must be inside a derived-type CONTAINS"); | |
7925 | return MATCH_ERROR; | |
7926 | } | |
7927 | if (gfc_current_state () != COMP_DERIVED_CONTAINS) | |
7928 | return MATCH_NO; | |
7929 | block = gfc_state_stack->previous->sym; | |
7930 | ns = block->f2k_derived; | |
7931 | gcc_assert (block && ns); | |
7932 | ||
ff5b6492 MM |
7933 | memset (&tbattr, 0, sizeof (tbattr)); |
7934 | tbattr.where = gfc_current_locus; | |
7935 | ||
e157f736 | 7936 | /* See if we get an access-specifier. */ |
713485cc | 7937 | m = match_binding_attributes (&tbattr, true, false); |
e157f736 DK |
7938 | if (m == MATCH_ERROR) |
7939 | goto error; | |
7940 | ||
7941 | /* Now the colons, those are required. */ | |
7942 | if (gfc_match (" ::") != MATCH_YES) | |
7943 | { | |
7944 | gfc_error ("Expected '::' at %C"); | |
7945 | goto error; | |
7946 | } | |
7947 | ||
94747289 DK |
7948 | /* Match the binding name; depending on type (operator / generic) format |
7949 | it for future error messages into bind_name. */ | |
7950 | ||
7951 | m = gfc_match_generic_spec (&op_type, name, &op); | |
e157f736 DK |
7952 | if (m == MATCH_ERROR) |
7953 | return MATCH_ERROR; | |
7954 | if (m == MATCH_NO) | |
7955 | { | |
94747289 | 7956 | gfc_error ("Expected generic name or operator descriptor at %C"); |
e157f736 DK |
7957 | goto error; |
7958 | } | |
7959 | ||
94747289 | 7960 | switch (op_type) |
e157f736 | 7961 | { |
94747289 DK |
7962 | case INTERFACE_GENERIC: |
7963 | snprintf (bind_name, sizeof (bind_name), "%s", name); | |
7964 | break; | |
7965 | ||
7966 | case INTERFACE_USER_OP: | |
7967 | snprintf (bind_name, sizeof (bind_name), "OPERATOR(.%s.)", name); | |
7968 | break; | |
7969 | ||
7970 | case INTERFACE_INTRINSIC_OP: | |
7971 | snprintf (bind_name, sizeof (bind_name), "OPERATOR(%s)", | |
7972 | gfc_op2string (op)); | |
7973 | break; | |
7974 | ||
7975 | default: | |
7976 | gcc_unreachable (); | |
7977 | } | |
e34ccb4c | 7978 | |
94747289 DK |
7979 | /* Match the required =>. */ |
7980 | if (gfc_match (" =>") != MATCH_YES) | |
7981 | { | |
7982 | gfc_error ("Expected '=>' at %C"); | |
7983 | goto error; | |
7984 | } | |
7985 | ||
7986 | /* Try to find existing GENERIC binding with this name / for this operator; | |
7987 | if there is something, check that it is another GENERIC and then extend | |
7988 | it rather than building a new node. Otherwise, create it and put it | |
7989 | at the right position. */ | |
7990 | ||
7991 | switch (op_type) | |
7992 | { | |
7993 | case INTERFACE_USER_OP: | |
7994 | case INTERFACE_GENERIC: | |
7995 | { | |
7996 | const bool is_op = (op_type == INTERFACE_USER_OP); | |
7997 | gfc_symtree* st; | |
7998 | ||
7999 | st = gfc_find_symtree (is_op ? ns->tb_uop_root : ns->tb_sym_root, name); | |
8000 | if (st) | |
8001 | { | |
8002 | tb = st->n.tb; | |
8003 | gcc_assert (tb); | |
8004 | } | |
8005 | else | |
8006 | tb = NULL; | |
8007 | ||
8008 | break; | |
8009 | } | |
8010 | ||
8011 | case INTERFACE_INTRINSIC_OP: | |
8012 | tb = ns->tb_op[op]; | |
8013 | break; | |
8014 | ||
8015 | default: | |
8016 | gcc_unreachable (); | |
8017 | } | |
8018 | ||
8019 | if (tb) | |
8020 | { | |
e34ccb4c | 8021 | if (!tb->is_generic) |
e157f736 | 8022 | { |
94747289 | 8023 | gcc_assert (op_type == INTERFACE_GENERIC); |
e157f736 DK |
8024 | gfc_error ("There's already a non-generic procedure with binding name" |
8025 | " '%s' for the derived type '%s' at %C", | |
94747289 | 8026 | bind_name, block->name); |
e157f736 DK |
8027 | goto error; |
8028 | } | |
8029 | ||
e157f736 DK |
8030 | if (tb->access != tbattr.access) |
8031 | { | |
8032 | gfc_error ("Binding at %C must have the same access as already" | |
94747289 | 8033 | " defined binding '%s'", bind_name); |
e157f736 DK |
8034 | goto error; |
8035 | } | |
8036 | } | |
8037 | else | |
8038 | { | |
3e15518b | 8039 | tb = gfc_get_typebound_proc (NULL); |
e157f736 DK |
8040 | tb->where = gfc_current_locus; |
8041 | tb->access = tbattr.access; | |
8042 | tb->is_generic = 1; | |
8043 | tb->u.generic = NULL; | |
94747289 DK |
8044 | |
8045 | switch (op_type) | |
8046 | { | |
8047 | case INTERFACE_GENERIC: | |
8048 | case INTERFACE_USER_OP: | |
8049 | { | |
8050 | const bool is_op = (op_type == INTERFACE_USER_OP); | |
8051 | gfc_symtree* st; | |
8052 | ||
8053 | st = gfc_new_symtree (is_op ? &ns->tb_uop_root : &ns->tb_sym_root, | |
8054 | name); | |
8055 | gcc_assert (st); | |
8056 | st->n.tb = tb; | |
8057 | ||
8058 | break; | |
8059 | } | |
8060 | ||
8061 | case INTERFACE_INTRINSIC_OP: | |
8062 | ns->tb_op[op] = tb; | |
8063 | break; | |
8064 | ||
8065 | default: | |
8066 | gcc_unreachable (); | |
8067 | } | |
e157f736 DK |
8068 | } |
8069 | ||
8070 | /* Now, match all following names as specific targets. */ | |
8071 | do | |
8072 | { | |
8073 | gfc_symtree* target_st; | |
8074 | gfc_tbp_generic* target; | |
8075 | ||
8076 | m = gfc_match_name (name); | |
8077 | if (m == MATCH_ERROR) | |
8078 | goto error; | |
8079 | if (m == MATCH_NO) | |
8080 | { | |
8081 | gfc_error ("Expected specific binding name at %C"); | |
8082 | goto error; | |
8083 | } | |
8084 | ||
e34ccb4c | 8085 | target_st = gfc_get_tbp_symtree (&ns->tb_sym_root, name); |
e157f736 DK |
8086 | |
8087 | /* See if this is a duplicate specification. */ | |
8088 | for (target = tb->u.generic; target; target = target->next) | |
8089 | if (target_st == target->specific_st) | |
8090 | { | |
8091 | gfc_error ("'%s' already defined as specific binding for the" | |
94747289 | 8092 | " generic '%s' at %C", name, bind_name); |
e157f736 DK |
8093 | goto error; |
8094 | } | |
8095 | ||
e157f736 DK |
8096 | target = gfc_get_tbp_generic (); |
8097 | target->specific_st = target_st; | |
8098 | target->specific = NULL; | |
8099 | target->next = tb->u.generic; | |
8100 | tb->u.generic = target; | |
8101 | } | |
8102 | while (gfc_match (" ,") == MATCH_YES); | |
8103 | ||
8104 | /* Here should be the end. */ | |
8105 | if (gfc_match_eos () != MATCH_YES) | |
8106 | { | |
8107 | gfc_error ("Junk after GENERIC binding at %C"); | |
8108 | goto error; | |
8109 | } | |
8110 | ||
8111 | return MATCH_YES; | |
8112 | ||
8113 | error: | |
8114 | return MATCH_ERROR; | |
8115 | } | |
8116 | ||
8117 | ||
34523524 DK |
8118 | /* Match a FINAL declaration inside a derived type. */ |
8119 | ||
8120 | match | |
8121 | gfc_match_final_decl (void) | |
8122 | { | |
8123 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
8124 | gfc_symbol* sym; | |
8125 | match m; | |
8126 | gfc_namespace* module_ns; | |
8127 | bool first, last; | |
30b608eb | 8128 | gfc_symbol* block; |
34523524 | 8129 | |
33344e0f JW |
8130 | if (gfc_current_form == FORM_FREE) |
8131 | { | |
8132 | char c = gfc_peek_ascii_char (); | |
8133 | if (!gfc_is_whitespace (c) && c != ':') | |
8134 | return MATCH_NO; | |
8135 | } | |
8136 | ||
30b608eb | 8137 | if (gfc_state_stack->state != COMP_DERIVED_CONTAINS) |
34523524 | 8138 | { |
33344e0f JW |
8139 | if (gfc_current_form == FORM_FIXED) |
8140 | return MATCH_NO; | |
8141 | ||
34523524 | 8142 | gfc_error ("FINAL declaration at %C must be inside a derived type " |
30b608eb | 8143 | "CONTAINS section"); |
34523524 DK |
8144 | return MATCH_ERROR; |
8145 | } | |
8146 | ||
30b608eb DK |
8147 | block = gfc_state_stack->previous->sym; |
8148 | gcc_assert (block); | |
34523524 | 8149 | |
30b608eb DK |
8150 | if (!gfc_state_stack->previous || !gfc_state_stack->previous->previous |
8151 | || gfc_state_stack->previous->previous->state != COMP_MODULE) | |
34523524 DK |
8152 | { |
8153 | gfc_error ("Derived type declaration with FINAL at %C must be in the" | |
8154 | " specification part of a MODULE"); | |
8155 | return MATCH_ERROR; | |
8156 | } | |
8157 | ||
8158 | module_ns = gfc_current_ns; | |
8159 | gcc_assert (module_ns); | |
8160 | gcc_assert (module_ns->proc_name->attr.flavor == FL_MODULE); | |
8161 | ||
8162 | /* Match optional ::, don't care about MATCH_YES or MATCH_NO. */ | |
8163 | if (gfc_match (" ::") == MATCH_ERROR) | |
8164 | return MATCH_ERROR; | |
8165 | ||
8166 | /* Match the sequence of procedure names. */ | |
8167 | first = true; | |
8168 | last = false; | |
8169 | do | |
8170 | { | |
8171 | gfc_finalizer* f; | |
8172 | ||
8173 | if (first && gfc_match_eos () == MATCH_YES) | |
8174 | { | |
8175 | gfc_error ("Empty FINAL at %C"); | |
8176 | return MATCH_ERROR; | |
8177 | } | |
8178 | ||
8179 | m = gfc_match_name (name); | |
8180 | if (m == MATCH_NO) | |
8181 | { | |
8182 | gfc_error ("Expected module procedure name at %C"); | |
8183 | return MATCH_ERROR; | |
8184 | } | |
8185 | else if (m != MATCH_YES) | |
8186 | return MATCH_ERROR; | |
8187 | ||
8188 | if (gfc_match_eos () == MATCH_YES) | |
8189 | last = true; | |
8190 | if (!last && gfc_match_char (',') != MATCH_YES) | |
8191 | { | |
8192 | gfc_error ("Expected ',' at %C"); | |
8193 | return MATCH_ERROR; | |
8194 | } | |
8195 | ||
8196 | if (gfc_get_symbol (name, module_ns, &sym)) | |
8197 | { | |
8198 | gfc_error ("Unknown procedure name \"%s\" at %C", name); | |
8199 | return MATCH_ERROR; | |
8200 | } | |
8201 | ||
8202 | /* Mark the symbol as module procedure. */ | |
8203 | if (sym->attr.proc != PROC_MODULE | |
8204 | && gfc_add_procedure (&sym->attr, PROC_MODULE, | |
8205 | sym->name, NULL) == FAILURE) | |
8206 | return MATCH_ERROR; | |
8207 | ||
8208 | /* Check if we already have this symbol in the list, this is an error. */ | |
30b608eb | 8209 | for (f = block->f2k_derived->finalizers; f; f = f->next) |
f6fad28e | 8210 | if (f->proc_sym == sym) |
34523524 DK |
8211 | { |
8212 | gfc_error ("'%s' at %C is already defined as FINAL procedure!", | |
8213 | name); | |
8214 | return MATCH_ERROR; | |
8215 | } | |
8216 | ||
8217 | /* Add this symbol to the list of finalizers. */ | |
30b608eb | 8218 | gcc_assert (block->f2k_derived); |
34523524 | 8219 | ++sym->refs; |
ece3f663 | 8220 | f = XCNEW (gfc_finalizer); |
f6fad28e DK |
8221 | f->proc_sym = sym; |
8222 | f->proc_tree = NULL; | |
34523524 | 8223 | f->where = gfc_current_locus; |
30b608eb DK |
8224 | f->next = block->f2k_derived->finalizers; |
8225 | block->f2k_derived->finalizers = f; | |
34523524 DK |
8226 | |
8227 | first = false; | |
8228 | } | |
8229 | while (!last); | |
8230 | ||
8231 | return MATCH_YES; | |
8232 | } | |
08a6b8e0 TB |
8233 | |
8234 | ||
8235 | const ext_attr_t ext_attr_list[] = { | |
8236 | { "dllimport", EXT_ATTR_DLLIMPORT, "dllimport" }, | |
8237 | { "dllexport", EXT_ATTR_DLLEXPORT, "dllexport" }, | |
8238 | { "cdecl", EXT_ATTR_CDECL, "cdecl" }, | |
8239 | { "stdcall", EXT_ATTR_STDCALL, "stdcall" }, | |
8240 | { "fastcall", EXT_ATTR_FASTCALL, "fastcall" }, | |
8241 | { NULL, EXT_ATTR_LAST, NULL } | |
8242 | }; | |
8243 | ||
8244 | /* Match a !GCC$ ATTRIBUTES statement of the form: | |
8245 | !GCC$ ATTRIBUTES attribute-list :: var-name [, var-name] ... | |
8246 | When we come here, we have already matched the !GCC$ ATTRIBUTES string. | |
8247 | ||
8248 | TODO: We should support all GCC attributes using the same syntax for | |
8249 | the attribute list, i.e. the list in C | |
8250 | __attributes(( attribute-list )) | |
8251 | matches then | |
8252 | !GCC$ ATTRIBUTES attribute-list :: | |
8253 | Cf. c-parser.c's c_parser_attributes; the data can then directly be | |
8254 | saved into a TREE. | |
8255 | ||
8256 | As there is absolutely no risk of confusion, we should never return | |
8257 | MATCH_NO. */ | |
8258 | match | |
8259 | gfc_match_gcc_attributes (void) | |
8260 | { | |
8261 | symbol_attribute attr; | |
8262 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
8263 | unsigned id; | |
8264 | gfc_symbol *sym; | |
8265 | match m; | |
8266 | ||
8267 | gfc_clear_attr (&attr); | |
8268 | for(;;) | |
8269 | { | |
8270 | char ch; | |
8271 | ||
8272 | if (gfc_match_name (name) != MATCH_YES) | |
8273 | return MATCH_ERROR; | |
8274 | ||
8275 | for (id = 0; id < EXT_ATTR_LAST; id++) | |
8276 | if (strcmp (name, ext_attr_list[id].name) == 0) | |
8277 | break; | |
8278 | ||
8279 | if (id == EXT_ATTR_LAST) | |
8280 | { | |
8281 | gfc_error ("Unknown attribute in !GCC$ ATTRIBUTES statement at %C"); | |
8282 | return MATCH_ERROR; | |
8283 | } | |
8284 | ||
2b374f55 | 8285 | if (gfc_add_ext_attribute (&attr, (ext_attr_id_t) id, &gfc_current_locus) |
08a6b8e0 TB |
8286 | == FAILURE) |
8287 | return MATCH_ERROR; | |
8288 | ||
8289 | gfc_gobble_whitespace (); | |
8290 | ch = gfc_next_ascii_char (); | |
8291 | if (ch == ':') | |
8292 | { | |
8293 | /* This is the successful exit condition for the loop. */ | |
8294 | if (gfc_next_ascii_char () == ':') | |
8295 | break; | |
8296 | } | |
8297 | ||
8298 | if (ch == ',') | |
8299 | continue; | |
8300 | ||
8301 | goto syntax; | |
8302 | } | |
8303 | ||
8304 | if (gfc_match_eos () == MATCH_YES) | |
8305 | goto syntax; | |
8306 | ||
8307 | for(;;) | |
8308 | { | |
8309 | m = gfc_match_name (name); | |
8310 | if (m != MATCH_YES) | |
8311 | return m; | |
8312 | ||
8313 | if (find_special (name, &sym, true)) | |
8314 | return MATCH_ERROR; | |
8315 | ||
8316 | sym->attr.ext_attr |= attr.ext_attr; | |
8317 | ||
8318 | if (gfc_match_eos () == MATCH_YES) | |
8319 | break; | |
8320 | ||
8321 | if (gfc_match_char (',') != MATCH_YES) | |
8322 | goto syntax; | |
8323 | } | |
8324 | ||
8325 | return MATCH_YES; | |
8326 | ||
8327 | syntax: | |
8328 | gfc_error ("Syntax error in !GCC$ ATTRIBUTES statement at %C"); | |
8329 | return MATCH_ERROR; | |
8330 | } |