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6de9cd9a | 1 | /* Matching subroutines in all sizes, shapes and colors. |
23a5b65a | 2 | Copyright (C) 2000-2014 Free Software Foundation, Inc. |
6de9cd9a DN |
3 | Contributed by Andy Vaught |
4 | ||
9fc4d79b | 5 | This file is part of GCC. |
6de9cd9a | 6 | |
9fc4d79b TS |
7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free | |
d234d788 | 9 | Software Foundation; either version 3, or (at your option) any later |
9fc4d79b | 10 | version. |
6de9cd9a | 11 | |
9fc4d79b TS |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
6de9cd9a DN |
16 | |
17 | You should have received a copy of the GNU General Public License | |
d234d788 NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a | 20 | |
6de9cd9a DN |
21 | #include "config.h" |
22 | #include "system.h" | |
953bee7c | 23 | #include "coretypes.h" |
6de9cd9a | 24 | #include "flags.h" |
6de9cd9a DN |
25 | #include "gfortran.h" |
26 | #include "match.h" | |
27 | #include "parse.h" | |
62603fae | 28 | #include "tree.h" |
d8a2d370 | 29 | #include "stringpool.h" |
6de9cd9a | 30 | |
837c4b78 | 31 | int gfc_matching_ptr_assignment = 0; |
8fb74da4 | 32 | int gfc_matching_procptr_assignment = 0; |
3df684e2 | 33 | bool gfc_matching_prefix = false; |
6de9cd9a | 34 | |
7431bf06 JW |
35 | /* Stack of SELECT TYPE statements. */ |
36 | gfc_select_type_stack *select_type_stack = NULL; | |
cf2b3c22 | 37 | |
ba3ba492 RS |
38 | /* For debugging and diagnostic purposes. Return the textual representation |
39 | of the intrinsic operator OP. */ | |
40 | const char * | |
41 | gfc_op2string (gfc_intrinsic_op op) | |
42 | { | |
43 | switch (op) | |
44 | { | |
45 | case INTRINSIC_UPLUS: | |
46 | case INTRINSIC_PLUS: | |
47 | return "+"; | |
48 | ||
49 | case INTRINSIC_UMINUS: | |
50 | case INTRINSIC_MINUS: | |
51 | return "-"; | |
52 | ||
53 | case INTRINSIC_POWER: | |
54 | return "**"; | |
55 | case INTRINSIC_CONCAT: | |
56 | return "//"; | |
57 | case INTRINSIC_TIMES: | |
58 | return "*"; | |
59 | case INTRINSIC_DIVIDE: | |
60 | return "/"; | |
61 | ||
62 | case INTRINSIC_AND: | |
63 | return ".and."; | |
64 | case INTRINSIC_OR: | |
65 | return ".or."; | |
66 | case INTRINSIC_EQV: | |
67 | return ".eqv."; | |
68 | case INTRINSIC_NEQV: | |
69 | return ".neqv."; | |
70 | ||
71 | case INTRINSIC_EQ_OS: | |
72 | return ".eq."; | |
73 | case INTRINSIC_EQ: | |
74 | return "=="; | |
75 | case INTRINSIC_NE_OS: | |
76 | return ".ne."; | |
77 | case INTRINSIC_NE: | |
78 | return "/="; | |
79 | case INTRINSIC_GE_OS: | |
80 | return ".ge."; | |
81 | case INTRINSIC_GE: | |
82 | return ">="; | |
83 | case INTRINSIC_LE_OS: | |
84 | return ".le."; | |
85 | case INTRINSIC_LE: | |
86 | return "<="; | |
87 | case INTRINSIC_LT_OS: | |
88 | return ".lt."; | |
89 | case INTRINSIC_LT: | |
90 | return "<"; | |
91 | case INTRINSIC_GT_OS: | |
92 | return ".gt."; | |
93 | case INTRINSIC_GT: | |
94 | return ">"; | |
95 | case INTRINSIC_NOT: | |
96 | return ".not."; | |
97 | ||
98 | case INTRINSIC_ASSIGN: | |
99 | return "="; | |
100 | ||
101 | case INTRINSIC_PARENTHESES: | |
102 | return "parens"; | |
103 | ||
104 | default: | |
105 | break; | |
106 | } | |
107 | ||
108 | gfc_internal_error ("gfc_op2string(): Bad code"); | |
109 | /* Not reached. */ | |
110 | } | |
111 | ||
6de9cd9a DN |
112 | |
113 | /******************** Generic matching subroutines ************************/ | |
114 | ||
f9b9fb82 JD |
115 | /* This function scans the current statement counting the opened and closed |
116 | parenthesis to make sure they are balanced. */ | |
117 | ||
118 | match | |
119 | gfc_match_parens (void) | |
120 | { | |
121 | locus old_loc, where; | |
696abb30 JD |
122 | int count; |
123 | gfc_instring instring; | |
8fc541d3 | 124 | gfc_char_t c, quote; |
f9b9fb82 JD |
125 | |
126 | old_loc = gfc_current_locus; | |
127 | count = 0; | |
696abb30 | 128 | instring = NONSTRING; |
f9b9fb82 JD |
129 | quote = ' '; |
130 | ||
131 | for (;;) | |
132 | { | |
133 | c = gfc_next_char_literal (instring); | |
134 | if (c == '\n') | |
135 | break; | |
136 | if (quote == ' ' && ((c == '\'') || (c == '"'))) | |
137 | { | |
8fc541d3 | 138 | quote = c; |
696abb30 | 139 | instring = INSTRING_WARN; |
f9b9fb82 JD |
140 | continue; |
141 | } | |
142 | if (quote != ' ' && c == quote) | |
143 | { | |
144 | quote = ' '; | |
696abb30 | 145 | instring = NONSTRING; |
f9b9fb82 JD |
146 | continue; |
147 | } | |
148 | ||
149 | if (c == '(' && quote == ' ') | |
150 | { | |
151 | count++; | |
152 | where = gfc_current_locus; | |
153 | } | |
154 | if (c == ')' && quote == ' ') | |
155 | { | |
156 | count--; | |
157 | where = gfc_current_locus; | |
158 | } | |
159 | } | |
160 | ||
161 | gfc_current_locus = old_loc; | |
162 | ||
163 | if (count > 0) | |
164 | { | |
acb388a0 | 165 | gfc_error ("Missing ')' in statement at or before %L", &where); |
f9b9fb82 JD |
166 | return MATCH_ERROR; |
167 | } | |
168 | if (count < 0) | |
169 | { | |
acb388a0 | 170 | gfc_error ("Missing '(' in statement at or before %L", &where); |
f9b9fb82 JD |
171 | return MATCH_ERROR; |
172 | } | |
173 | ||
174 | return MATCH_YES; | |
175 | } | |
176 | ||
177 | ||
a88a266c SK |
178 | /* See if the next character is a special character that has |
179 | escaped by a \ via the -fbackslash option. */ | |
180 | ||
181 | match | |
8fc541d3 | 182 | gfc_match_special_char (gfc_char_t *res) |
a88a266c | 183 | { |
8fc541d3 FXC |
184 | int len, i; |
185 | gfc_char_t c, n; | |
a88a266c SK |
186 | match m; |
187 | ||
188 | m = MATCH_YES; | |
189 | ||
696abb30 | 190 | switch ((c = gfc_next_char_literal (INSTRING_WARN))) |
a88a266c SK |
191 | { |
192 | case 'a': | |
8fc541d3 | 193 | *res = '\a'; |
a88a266c SK |
194 | break; |
195 | case 'b': | |
8fc541d3 | 196 | *res = '\b'; |
a88a266c SK |
197 | break; |
198 | case 't': | |
8fc541d3 | 199 | *res = '\t'; |
a88a266c SK |
200 | break; |
201 | case 'f': | |
8fc541d3 | 202 | *res = '\f'; |
a88a266c SK |
203 | break; |
204 | case 'n': | |
8fc541d3 | 205 | *res = '\n'; |
a88a266c SK |
206 | break; |
207 | case 'r': | |
8fc541d3 | 208 | *res = '\r'; |
a88a266c SK |
209 | break; |
210 | case 'v': | |
8fc541d3 | 211 | *res = '\v'; |
a88a266c SK |
212 | break; |
213 | case '\\': | |
8fc541d3 | 214 | *res = '\\'; |
a88a266c SK |
215 | break; |
216 | case '0': | |
8fc541d3 FXC |
217 | *res = '\0'; |
218 | break; | |
219 | ||
220 | case 'x': | |
221 | case 'u': | |
222 | case 'U': | |
223 | /* Hexadecimal form of wide characters. */ | |
224 | len = (c == 'x' ? 2 : (c == 'u' ? 4 : 8)); | |
225 | n = 0; | |
226 | for (i = 0; i < len; i++) | |
227 | { | |
228 | char buf[2] = { '\0', '\0' }; | |
229 | ||
696abb30 | 230 | c = gfc_next_char_literal (INSTRING_WARN); |
8fc541d3 FXC |
231 | if (!gfc_wide_fits_in_byte (c) |
232 | || !gfc_check_digit ((unsigned char) c, 16)) | |
233 | return MATCH_NO; | |
234 | ||
235 | buf[0] = (unsigned char) c; | |
236 | n = n << 4; | |
237 | n += strtol (buf, NULL, 16); | |
238 | } | |
239 | *res = n; | |
a88a266c | 240 | break; |
8fc541d3 | 241 | |
a88a266c SK |
242 | default: |
243 | /* Unknown backslash codes are simply not expanded. */ | |
244 | m = MATCH_NO; | |
245 | break; | |
246 | } | |
247 | ||
248 | return m; | |
249 | } | |
250 | ||
251 | ||
6de9cd9a DN |
252 | /* In free form, match at least one space. Always matches in fixed |
253 | form. */ | |
254 | ||
255 | match | |
256 | gfc_match_space (void) | |
257 | { | |
258 | locus old_loc; | |
8fc541d3 | 259 | char c; |
6de9cd9a | 260 | |
d4fa05b9 | 261 | if (gfc_current_form == FORM_FIXED) |
6de9cd9a DN |
262 | return MATCH_YES; |
263 | ||
63645982 | 264 | old_loc = gfc_current_locus; |
6de9cd9a | 265 | |
8fc541d3 | 266 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
267 | if (!gfc_is_whitespace (c)) |
268 | { | |
63645982 | 269 | gfc_current_locus = old_loc; |
6de9cd9a DN |
270 | return MATCH_NO; |
271 | } | |
272 | ||
273 | gfc_gobble_whitespace (); | |
274 | ||
275 | return MATCH_YES; | |
276 | } | |
277 | ||
278 | ||
279 | /* Match an end of statement. End of statement is optional | |
280 | whitespace, followed by a ';' or '\n' or comment '!'. If a | |
281 | semicolon is found, we continue to eat whitespace and semicolons. */ | |
282 | ||
283 | match | |
284 | gfc_match_eos (void) | |
285 | { | |
286 | locus old_loc; | |
8fc541d3 FXC |
287 | int flag; |
288 | char c; | |
6de9cd9a DN |
289 | |
290 | flag = 0; | |
291 | ||
292 | for (;;) | |
293 | { | |
63645982 | 294 | old_loc = gfc_current_locus; |
6de9cd9a DN |
295 | gfc_gobble_whitespace (); |
296 | ||
8fc541d3 | 297 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
298 | switch (c) |
299 | { | |
300 | case '!': | |
301 | do | |
302 | { | |
8fc541d3 | 303 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
304 | } |
305 | while (c != '\n'); | |
306 | ||
66e4ab31 | 307 | /* Fall through. */ |
6de9cd9a DN |
308 | |
309 | case '\n': | |
310 | return MATCH_YES; | |
311 | ||
312 | case ';': | |
313 | flag = 1; | |
314 | continue; | |
315 | } | |
316 | ||
317 | break; | |
318 | } | |
319 | ||
63645982 | 320 | gfc_current_locus = old_loc; |
6de9cd9a DN |
321 | return (flag) ? MATCH_YES : MATCH_NO; |
322 | } | |
323 | ||
324 | ||
325 | /* Match a literal integer on the input, setting the value on | |
326 | MATCH_YES. Literal ints occur in kind-parameters as well as | |
5cf54585 TS |
327 | old-style character length specifications. If cnt is non-NULL it |
328 | will be set to the number of digits. */ | |
6de9cd9a DN |
329 | |
330 | match | |
8a8f7eca | 331 | gfc_match_small_literal_int (int *value, int *cnt) |
6de9cd9a DN |
332 | { |
333 | locus old_loc; | |
334 | char c; | |
8a8f7eca | 335 | int i, j; |
6de9cd9a | 336 | |
63645982 | 337 | old_loc = gfc_current_locus; |
6de9cd9a | 338 | |
8fc541d3 | 339 | *value = -1; |
6de9cd9a | 340 | gfc_gobble_whitespace (); |
8fc541d3 | 341 | c = gfc_next_ascii_char (); |
5cf54585 TS |
342 | if (cnt) |
343 | *cnt = 0; | |
6de9cd9a DN |
344 | |
345 | if (!ISDIGIT (c)) | |
346 | { | |
63645982 | 347 | gfc_current_locus = old_loc; |
6de9cd9a DN |
348 | return MATCH_NO; |
349 | } | |
350 | ||
351 | i = c - '0'; | |
8a8f7eca | 352 | j = 1; |
6de9cd9a DN |
353 | |
354 | for (;;) | |
355 | { | |
63645982 | 356 | old_loc = gfc_current_locus; |
8fc541d3 | 357 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
358 | |
359 | if (!ISDIGIT (c)) | |
360 | break; | |
361 | ||
362 | i = 10 * i + c - '0'; | |
8a8f7eca | 363 | j++; |
6de9cd9a DN |
364 | |
365 | if (i > 99999999) | |
366 | { | |
367 | gfc_error ("Integer too large at %C"); | |
368 | return MATCH_ERROR; | |
369 | } | |
370 | } | |
371 | ||
63645982 | 372 | gfc_current_locus = old_loc; |
6de9cd9a DN |
373 | |
374 | *value = i; | |
5cf54585 TS |
375 | if (cnt) |
376 | *cnt = j; | |
6de9cd9a DN |
377 | return MATCH_YES; |
378 | } | |
379 | ||
380 | ||
381 | /* Match a small, constant integer expression, like in a kind | |
382 | statement. On MATCH_YES, 'value' is set. */ | |
383 | ||
384 | match | |
385 | gfc_match_small_int (int *value) | |
386 | { | |
387 | gfc_expr *expr; | |
388 | const char *p; | |
389 | match m; | |
390 | int i; | |
391 | ||
392 | m = gfc_match_expr (&expr); | |
393 | if (m != MATCH_YES) | |
394 | return m; | |
395 | ||
396 | p = gfc_extract_int (expr, &i); | |
397 | gfc_free_expr (expr); | |
398 | ||
399 | if (p != NULL) | |
400 | { | |
401 | gfc_error (p); | |
402 | m = MATCH_ERROR; | |
403 | } | |
404 | ||
405 | *value = i; | |
406 | return m; | |
407 | } | |
408 | ||
409 | ||
a8b3b0b6 CR |
410 | /* This function is the same as the gfc_match_small_int, except that |
411 | we're keeping the pointer to the expr. This function could just be | |
412 | removed and the previously mentioned one modified, though all calls | |
413 | to it would have to be modified then (and there were a number of | |
414 | them). Return MATCH_ERROR if fail to extract the int; otherwise, | |
415 | return the result of gfc_match_expr(). The expr (if any) that was | |
416 | matched is returned in the parameter expr. */ | |
417 | ||
418 | match | |
419 | gfc_match_small_int_expr (int *value, gfc_expr **expr) | |
420 | { | |
421 | const char *p; | |
422 | match m; | |
423 | int i; | |
424 | ||
425 | m = gfc_match_expr (expr); | |
426 | if (m != MATCH_YES) | |
427 | return m; | |
428 | ||
429 | p = gfc_extract_int (*expr, &i); | |
430 | ||
431 | if (p != NULL) | |
432 | { | |
433 | gfc_error (p); | |
434 | m = MATCH_ERROR; | |
435 | } | |
436 | ||
437 | *value = i; | |
438 | return m; | |
439 | } | |
440 | ||
441 | ||
6de9cd9a DN |
442 | /* Matches a statement label. Uses gfc_match_small_literal_int() to |
443 | do most of the work. */ | |
444 | ||
445 | match | |
b251af97 | 446 | gfc_match_st_label (gfc_st_label **label) |
6de9cd9a DN |
447 | { |
448 | locus old_loc; | |
449 | match m; | |
8a8f7eca | 450 | int i, cnt; |
6de9cd9a | 451 | |
63645982 | 452 | old_loc = gfc_current_locus; |
6de9cd9a | 453 | |
8a8f7eca | 454 | m = gfc_match_small_literal_int (&i, &cnt); |
6de9cd9a DN |
455 | if (m != MATCH_YES) |
456 | return m; | |
457 | ||
8a8f7eca | 458 | if (cnt > 5) |
6de9cd9a | 459 | { |
8a8f7eca SK |
460 | gfc_error ("Too many digits in statement label at %C"); |
461 | goto cleanup; | |
6de9cd9a DN |
462 | } |
463 | ||
a34a91f0 | 464 | if (i == 0) |
8a8f7eca SK |
465 | { |
466 | gfc_error ("Statement label at %C is zero"); | |
467 | goto cleanup; | |
468 | } | |
469 | ||
470 | *label = gfc_get_st_label (i); | |
471 | return MATCH_YES; | |
472 | ||
473 | cleanup: | |
474 | ||
63645982 | 475 | gfc_current_locus = old_loc; |
6de9cd9a DN |
476 | return MATCH_ERROR; |
477 | } | |
478 | ||
479 | ||
480 | /* Match and validate a label associated with a named IF, DO or SELECT | |
481 | statement. If the symbol does not have the label attribute, we add | |
482 | it. We also make sure the symbol does not refer to another | |
483 | (active) block. A matched label is pointed to by gfc_new_block. */ | |
484 | ||
485 | match | |
486 | gfc_match_label (void) | |
487 | { | |
488 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6de9cd9a DN |
489 | match m; |
490 | ||
491 | gfc_new_block = NULL; | |
492 | ||
493 | m = gfc_match (" %n :", name); | |
494 | if (m != MATCH_YES) | |
495 | return m; | |
496 | ||
497 | if (gfc_get_symbol (name, NULL, &gfc_new_block)) | |
498 | { | |
499 | gfc_error ("Label name '%s' at %C is ambiguous", name); | |
500 | return MATCH_ERROR; | |
501 | } | |
502 | ||
cb1d4dce SK |
503 | if (gfc_new_block->attr.flavor == FL_LABEL) |
504 | { | |
505 | gfc_error ("Duplicate construct label '%s' at %C", name); | |
506 | return MATCH_ERROR; | |
507 | } | |
6de9cd9a | 508 | |
524af0d6 JB |
509 | if (!gfc_add_flavor (&gfc_new_block->attr, FL_LABEL, |
510 | gfc_new_block->name, NULL)) | |
cb1d4dce | 511 | return MATCH_ERROR; |
6de9cd9a DN |
512 | |
513 | return MATCH_YES; | |
514 | } | |
515 | ||
516 | ||
6de9cd9a | 517 | /* See if the current input looks like a name of some sort. Modifies |
090021e9 BM |
518 | the passed buffer which must be GFC_MAX_SYMBOL_LEN+1 bytes long. |
519 | Note that options.c restricts max_identifier_length to not more | |
520 | than GFC_MAX_SYMBOL_LEN. */ | |
6de9cd9a DN |
521 | |
522 | match | |
523 | gfc_match_name (char *buffer) | |
524 | { | |
525 | locus old_loc; | |
8fc541d3 FXC |
526 | int i; |
527 | char c; | |
6de9cd9a | 528 | |
63645982 | 529 | old_loc = gfc_current_locus; |
6de9cd9a DN |
530 | gfc_gobble_whitespace (); |
531 | ||
8fc541d3 | 532 | c = gfc_next_ascii_char (); |
e6472bce | 533 | if (!(ISALPHA (c) || (c == '_' && gfc_option.flag_allow_leading_underscore))) |
6de9cd9a | 534 | { |
0f447a6e | 535 | if (!gfc_error_flag_test () && c != '(') |
b251af97 | 536 | gfc_error ("Invalid character in name at %C"); |
63645982 | 537 | gfc_current_locus = old_loc; |
6de9cd9a DN |
538 | return MATCH_NO; |
539 | } | |
540 | ||
541 | i = 0; | |
542 | ||
543 | do | |
544 | { | |
545 | buffer[i++] = c; | |
546 | ||
547 | if (i > gfc_option.max_identifier_length) | |
548 | { | |
549 | gfc_error ("Name at %C is too long"); | |
550 | return MATCH_ERROR; | |
551 | } | |
552 | ||
63645982 | 553 | old_loc = gfc_current_locus; |
8fc541d3 | 554 | c = gfc_next_ascii_char (); |
6de9cd9a | 555 | } |
b251af97 | 556 | while (ISALNUM (c) || c == '_' || (gfc_option.flag_dollar_ok && c == '$')); |
6de9cd9a | 557 | |
89a5afda TB |
558 | if (c == '$' && !gfc_option.flag_dollar_ok) |
559 | { | |
29e0597e TB |
560 | gfc_fatal_error ("Invalid character %<$%> at %L. Use %<-fdollar-ok%> to " |
561 | "allow it as an extension", &old_loc); | |
89a5afda TB |
562 | return MATCH_ERROR; |
563 | } | |
564 | ||
6de9cd9a | 565 | buffer[i] = '\0'; |
63645982 | 566 | gfc_current_locus = old_loc; |
6de9cd9a DN |
567 | |
568 | return MATCH_YES; | |
569 | } | |
570 | ||
571 | ||
572 | /* Match a symbol on the input. Modifies the pointer to the symbol | |
573 | pointer if successful. */ | |
574 | ||
575 | match | |
b251af97 | 576 | gfc_match_sym_tree (gfc_symtree **matched_symbol, int host_assoc) |
6de9cd9a DN |
577 | { |
578 | char buffer[GFC_MAX_SYMBOL_LEN + 1]; | |
579 | match m; | |
580 | ||
581 | m = gfc_match_name (buffer); | |
582 | if (m != MATCH_YES) | |
583 | return m; | |
584 | ||
585 | if (host_assoc) | |
586 | return (gfc_get_ha_sym_tree (buffer, matched_symbol)) | |
66e4ab31 | 587 | ? MATCH_ERROR : MATCH_YES; |
6de9cd9a | 588 | |
08a6b8e0 | 589 | if (gfc_get_sym_tree (buffer, NULL, matched_symbol, false)) |
6de9cd9a DN |
590 | return MATCH_ERROR; |
591 | ||
592 | return MATCH_YES; | |
593 | } | |
594 | ||
595 | ||
596 | match | |
b251af97 | 597 | gfc_match_symbol (gfc_symbol **matched_symbol, int host_assoc) |
6de9cd9a DN |
598 | { |
599 | gfc_symtree *st; | |
600 | match m; | |
601 | ||
602 | m = gfc_match_sym_tree (&st, host_assoc); | |
603 | ||
604 | if (m == MATCH_YES) | |
605 | { | |
606 | if (st) | |
b251af97 | 607 | *matched_symbol = st->n.sym; |
6de9cd9a | 608 | else |
b251af97 | 609 | *matched_symbol = NULL; |
6de9cd9a | 610 | } |
32cafd73 MH |
611 | else |
612 | *matched_symbol = NULL; | |
6de9cd9a DN |
613 | return m; |
614 | } | |
615 | ||
b251af97 | 616 | |
8b704316 PT |
617 | /* Match an intrinsic operator. Returns an INTRINSIC enum. While matching, |
618 | we always find INTRINSIC_PLUS before INTRINSIC_UPLUS. We work around this | |
6de9cd9a DN |
619 | in matchexp.c. */ |
620 | ||
621 | match | |
b251af97 | 622 | gfc_match_intrinsic_op (gfc_intrinsic_op *result) |
6de9cd9a | 623 | { |
f4d8e0d1 | 624 | locus orig_loc = gfc_current_locus; |
8fc541d3 | 625 | char ch; |
6de9cd9a | 626 | |
f4d8e0d1 | 627 | gfc_gobble_whitespace (); |
8fc541d3 | 628 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
629 | switch (ch) |
630 | { | |
631 | case '+': | |
632 | /* Matched "+". */ | |
633 | *result = INTRINSIC_PLUS; | |
634 | return MATCH_YES; | |
6de9cd9a | 635 | |
f4d8e0d1 RS |
636 | case '-': |
637 | /* Matched "-". */ | |
638 | *result = INTRINSIC_MINUS; | |
639 | return MATCH_YES; | |
6de9cd9a | 640 | |
f4d8e0d1 | 641 | case '=': |
8fc541d3 | 642 | if (gfc_next_ascii_char () == '=') |
f4d8e0d1 RS |
643 | { |
644 | /* Matched "==". */ | |
645 | *result = INTRINSIC_EQ; | |
646 | return MATCH_YES; | |
647 | } | |
648 | break; | |
649 | ||
650 | case '<': | |
8fc541d3 | 651 | if (gfc_peek_ascii_char () == '=') |
f4d8e0d1 RS |
652 | { |
653 | /* Matched "<=". */ | |
8fc541d3 | 654 | gfc_next_ascii_char (); |
f4d8e0d1 RS |
655 | *result = INTRINSIC_LE; |
656 | return MATCH_YES; | |
657 | } | |
658 | /* Matched "<". */ | |
659 | *result = INTRINSIC_LT; | |
660 | return MATCH_YES; | |
661 | ||
662 | case '>': | |
8fc541d3 | 663 | if (gfc_peek_ascii_char () == '=') |
f4d8e0d1 RS |
664 | { |
665 | /* Matched ">=". */ | |
8fc541d3 | 666 | gfc_next_ascii_char (); |
f4d8e0d1 RS |
667 | *result = INTRINSIC_GE; |
668 | return MATCH_YES; | |
669 | } | |
670 | /* Matched ">". */ | |
671 | *result = INTRINSIC_GT; | |
672 | return MATCH_YES; | |
673 | ||
674 | case '*': | |
8fc541d3 | 675 | if (gfc_peek_ascii_char () == '*') |
f4d8e0d1 RS |
676 | { |
677 | /* Matched "**". */ | |
8fc541d3 | 678 | gfc_next_ascii_char (); |
f4d8e0d1 RS |
679 | *result = INTRINSIC_POWER; |
680 | return MATCH_YES; | |
681 | } | |
682 | /* Matched "*". */ | |
683 | *result = INTRINSIC_TIMES; | |
684 | return MATCH_YES; | |
685 | ||
686 | case '/': | |
8fc541d3 | 687 | ch = gfc_peek_ascii_char (); |
f4d8e0d1 RS |
688 | if (ch == '=') |
689 | { | |
690 | /* Matched "/=". */ | |
8fc541d3 | 691 | gfc_next_ascii_char (); |
f4d8e0d1 RS |
692 | *result = INTRINSIC_NE; |
693 | return MATCH_YES; | |
694 | } | |
695 | else if (ch == '/') | |
696 | { | |
697 | /* Matched "//". */ | |
8fc541d3 | 698 | gfc_next_ascii_char (); |
f4d8e0d1 RS |
699 | *result = INTRINSIC_CONCAT; |
700 | return MATCH_YES; | |
701 | } | |
702 | /* Matched "/". */ | |
703 | *result = INTRINSIC_DIVIDE; | |
704 | return MATCH_YES; | |
705 | ||
706 | case '.': | |
8fc541d3 | 707 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
708 | switch (ch) |
709 | { | |
710 | case 'a': | |
8fc541d3 FXC |
711 | if (gfc_next_ascii_char () == 'n' |
712 | && gfc_next_ascii_char () == 'd' | |
713 | && gfc_next_ascii_char () == '.') | |
f4d8e0d1 RS |
714 | { |
715 | /* Matched ".and.". */ | |
716 | *result = INTRINSIC_AND; | |
717 | return MATCH_YES; | |
718 | } | |
719 | break; | |
720 | ||
721 | case 'e': | |
8fc541d3 | 722 | if (gfc_next_ascii_char () == 'q') |
f4d8e0d1 | 723 | { |
8fc541d3 | 724 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
725 | if (ch == '.') |
726 | { | |
727 | /* Matched ".eq.". */ | |
728 | *result = INTRINSIC_EQ_OS; | |
729 | return MATCH_YES; | |
730 | } | |
731 | else if (ch == 'v') | |
732 | { | |
8fc541d3 | 733 | if (gfc_next_ascii_char () == '.') |
f4d8e0d1 RS |
734 | { |
735 | /* Matched ".eqv.". */ | |
736 | *result = INTRINSIC_EQV; | |
737 | return MATCH_YES; | |
738 | } | |
739 | } | |
740 | } | |
741 | break; | |
742 | ||
743 | case 'g': | |
8fc541d3 | 744 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
745 | if (ch == 'e') |
746 | { | |
8fc541d3 | 747 | if (gfc_next_ascii_char () == '.') |
f4d8e0d1 RS |
748 | { |
749 | /* Matched ".ge.". */ | |
750 | *result = INTRINSIC_GE_OS; | |
751 | return MATCH_YES; | |
752 | } | |
753 | } | |
754 | else if (ch == 't') | |
755 | { | |
8fc541d3 | 756 | if (gfc_next_ascii_char () == '.') |
f4d8e0d1 RS |
757 | { |
758 | /* Matched ".gt.". */ | |
759 | *result = INTRINSIC_GT_OS; | |
760 | return MATCH_YES; | |
761 | } | |
762 | } | |
763 | break; | |
764 | ||
765 | case 'l': | |
8fc541d3 | 766 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
767 | if (ch == 'e') |
768 | { | |
8fc541d3 | 769 | if (gfc_next_ascii_char () == '.') |
f4d8e0d1 RS |
770 | { |
771 | /* Matched ".le.". */ | |
772 | *result = INTRINSIC_LE_OS; | |
773 | return MATCH_YES; | |
774 | } | |
775 | } | |
776 | else if (ch == 't') | |
777 | { | |
8fc541d3 | 778 | if (gfc_next_ascii_char () == '.') |
f4d8e0d1 RS |
779 | { |
780 | /* Matched ".lt.". */ | |
781 | *result = INTRINSIC_LT_OS; | |
782 | return MATCH_YES; | |
783 | } | |
784 | } | |
785 | break; | |
786 | ||
787 | case 'n': | |
8fc541d3 | 788 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
789 | if (ch == 'e') |
790 | { | |
8fc541d3 | 791 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
792 | if (ch == '.') |
793 | { | |
794 | /* Matched ".ne.". */ | |
795 | *result = INTRINSIC_NE_OS; | |
796 | return MATCH_YES; | |
797 | } | |
798 | else if (ch == 'q') | |
799 | { | |
8fc541d3 FXC |
800 | if (gfc_next_ascii_char () == 'v' |
801 | && gfc_next_ascii_char () == '.') | |
f4d8e0d1 RS |
802 | { |
803 | /* Matched ".neqv.". */ | |
804 | *result = INTRINSIC_NEQV; | |
805 | return MATCH_YES; | |
806 | } | |
807 | } | |
808 | } | |
809 | else if (ch == 'o') | |
810 | { | |
8fc541d3 FXC |
811 | if (gfc_next_ascii_char () == 't' |
812 | && gfc_next_ascii_char () == '.') | |
f4d8e0d1 RS |
813 | { |
814 | /* Matched ".not.". */ | |
815 | *result = INTRINSIC_NOT; | |
816 | return MATCH_YES; | |
817 | } | |
818 | } | |
819 | break; | |
820 | ||
821 | case 'o': | |
8fc541d3 FXC |
822 | if (gfc_next_ascii_char () == 'r' |
823 | && gfc_next_ascii_char () == '.') | |
f4d8e0d1 RS |
824 | { |
825 | /* Matched ".or.". */ | |
826 | *result = INTRINSIC_OR; | |
827 | return MATCH_YES; | |
828 | } | |
829 | break; | |
830 | ||
831 | default: | |
832 | break; | |
833 | } | |
834 | break; | |
835 | ||
836 | default: | |
837 | break; | |
838 | } | |
839 | ||
840 | gfc_current_locus = orig_loc; | |
841 | return MATCH_NO; | |
6de9cd9a DN |
842 | } |
843 | ||
844 | ||
845 | /* Match a loop control phrase: | |
846 | ||
847 | <LVALUE> = <EXPR>, <EXPR> [, <EXPR> ] | |
848 | ||
849 | If the final integer expression is not present, a constant unity | |
850 | expression is returned. We don't return MATCH_ERROR until after | |
851 | the equals sign is seen. */ | |
852 | ||
853 | match | |
b251af97 | 854 | gfc_match_iterator (gfc_iterator *iter, int init_flag) |
6de9cd9a DN |
855 | { |
856 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
857 | gfc_expr *var, *e1, *e2, *e3; | |
858 | locus start; | |
859 | match m; | |
860 | ||
d3a9eea2 TB |
861 | e1 = e2 = e3 = NULL; |
862 | ||
b251af97 | 863 | /* Match the start of an iterator without affecting the symbol table. */ |
6de9cd9a | 864 | |
63645982 | 865 | start = gfc_current_locus; |
6de9cd9a | 866 | m = gfc_match (" %n =", name); |
63645982 | 867 | gfc_current_locus = start; |
6de9cd9a DN |
868 | |
869 | if (m != MATCH_YES) | |
870 | return MATCH_NO; | |
871 | ||
872 | m = gfc_match_variable (&var, 0); | |
873 | if (m != MATCH_YES) | |
874 | return MATCH_NO; | |
875 | ||
d3a9eea2 TB |
876 | /* F2008, C617 & C565. */ |
877 | if (var->symtree->n.sym->attr.codimension) | |
878 | { | |
879 | gfc_error ("Loop variable at %C cannot be a coarray"); | |
880 | goto cleanup; | |
881 | } | |
6de9cd9a DN |
882 | |
883 | if (var->ref != NULL) | |
884 | { | |
885 | gfc_error ("Loop variable at %C cannot be a sub-component"); | |
886 | goto cleanup; | |
887 | } | |
888 | ||
d3a9eea2 TB |
889 | gfc_match_char ('='); |
890 | ||
9a3db5a3 PT |
891 | var->symtree->n.sym->attr.implied_index = 1; |
892 | ||
6de9cd9a DN |
893 | m = init_flag ? gfc_match_init_expr (&e1) : gfc_match_expr (&e1); |
894 | if (m == MATCH_NO) | |
895 | goto syntax; | |
896 | if (m == MATCH_ERROR) | |
897 | goto cleanup; | |
898 | ||
899 | if (gfc_match_char (',') != MATCH_YES) | |
900 | goto syntax; | |
901 | ||
902 | m = init_flag ? gfc_match_init_expr (&e2) : gfc_match_expr (&e2); | |
903 | if (m == MATCH_NO) | |
904 | goto syntax; | |
905 | if (m == MATCH_ERROR) | |
906 | goto cleanup; | |
907 | ||
908 | if (gfc_match_char (',') != MATCH_YES) | |
909 | { | |
b7e75771 | 910 | e3 = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1); |
6de9cd9a DN |
911 | goto done; |
912 | } | |
913 | ||
914 | m = init_flag ? gfc_match_init_expr (&e3) : gfc_match_expr (&e3); | |
915 | if (m == MATCH_ERROR) | |
916 | goto cleanup; | |
917 | if (m == MATCH_NO) | |
918 | { | |
919 | gfc_error ("Expected a step value in iterator at %C"); | |
920 | goto cleanup; | |
921 | } | |
922 | ||
923 | done: | |
924 | iter->var = var; | |
925 | iter->start = e1; | |
926 | iter->end = e2; | |
927 | iter->step = e3; | |
928 | return MATCH_YES; | |
929 | ||
930 | syntax: | |
931 | gfc_error ("Syntax error in iterator at %C"); | |
932 | ||
933 | cleanup: | |
934 | gfc_free_expr (e1); | |
935 | gfc_free_expr (e2); | |
936 | gfc_free_expr (e3); | |
937 | ||
938 | return MATCH_ERROR; | |
939 | } | |
940 | ||
941 | ||
942 | /* Tries to match the next non-whitespace character on the input. | |
943 | This subroutine does not return MATCH_ERROR. */ | |
944 | ||
945 | match | |
946 | gfc_match_char (char c) | |
947 | { | |
948 | locus where; | |
949 | ||
63645982 | 950 | where = gfc_current_locus; |
6de9cd9a DN |
951 | gfc_gobble_whitespace (); |
952 | ||
8fc541d3 | 953 | if (gfc_next_ascii_char () == c) |
6de9cd9a DN |
954 | return MATCH_YES; |
955 | ||
63645982 | 956 | gfc_current_locus = where; |
6de9cd9a DN |
957 | return MATCH_NO; |
958 | } | |
959 | ||
960 | ||
961 | /* General purpose matching subroutine. The target string is a | |
962 | scanf-like format string in which spaces correspond to arbitrary | |
963 | whitespace (including no whitespace), characters correspond to | |
964 | themselves. The %-codes are: | |
965 | ||
966 | %% Literal percent sign | |
967 | %e Expression, pointer to a pointer is set | |
968 | %s Symbol, pointer to the symbol is set | |
969 | %n Name, character buffer is set to name | |
970 | %t Matches end of statement. | |
971 | %o Matches an intrinsic operator, returned as an INTRINSIC enum. | |
972 | %l Matches a statement label | |
973 | %v Matches a variable expression (an lvalue) | |
974 | % Matches a required space (in free form) and optional spaces. */ | |
975 | ||
976 | match | |
977 | gfc_match (const char *target, ...) | |
978 | { | |
979 | gfc_st_label **label; | |
980 | int matches, *ip; | |
981 | locus old_loc; | |
982 | va_list argp; | |
983 | char c, *np; | |
984 | match m, n; | |
985 | void **vp; | |
986 | const char *p; | |
987 | ||
63645982 | 988 | old_loc = gfc_current_locus; |
6de9cd9a DN |
989 | va_start (argp, target); |
990 | m = MATCH_NO; | |
991 | matches = 0; | |
992 | p = target; | |
993 | ||
994 | loop: | |
995 | c = *p++; | |
996 | switch (c) | |
997 | { | |
998 | case ' ': | |
999 | gfc_gobble_whitespace (); | |
1000 | goto loop; | |
1001 | case '\0': | |
1002 | m = MATCH_YES; | |
1003 | break; | |
1004 | ||
1005 | case '%': | |
1006 | c = *p++; | |
1007 | switch (c) | |
1008 | { | |
1009 | case 'e': | |
1010 | vp = va_arg (argp, void **); | |
1011 | n = gfc_match_expr ((gfc_expr **) vp); | |
1012 | if (n != MATCH_YES) | |
1013 | { | |
1014 | m = n; | |
1015 | goto not_yes; | |
1016 | } | |
1017 | ||
1018 | matches++; | |
1019 | goto loop; | |
1020 | ||
1021 | case 'v': | |
1022 | vp = va_arg (argp, void **); | |
1023 | n = gfc_match_variable ((gfc_expr **) vp, 0); | |
1024 | if (n != MATCH_YES) | |
1025 | { | |
1026 | m = n; | |
1027 | goto not_yes; | |
1028 | } | |
1029 | ||
1030 | matches++; | |
1031 | goto loop; | |
1032 | ||
1033 | case 's': | |
1034 | vp = va_arg (argp, void **); | |
1035 | n = gfc_match_symbol ((gfc_symbol **) vp, 0); | |
1036 | if (n != MATCH_YES) | |
1037 | { | |
1038 | m = n; | |
1039 | goto not_yes; | |
1040 | } | |
1041 | ||
1042 | matches++; | |
1043 | goto loop; | |
1044 | ||
1045 | case 'n': | |
1046 | np = va_arg (argp, char *); | |
1047 | n = gfc_match_name (np); | |
1048 | if (n != MATCH_YES) | |
1049 | { | |
1050 | m = n; | |
1051 | goto not_yes; | |
1052 | } | |
1053 | ||
1054 | matches++; | |
1055 | goto loop; | |
1056 | ||
1057 | case 'l': | |
1058 | label = va_arg (argp, gfc_st_label **); | |
a34a91f0 | 1059 | n = gfc_match_st_label (label); |
6de9cd9a DN |
1060 | if (n != MATCH_YES) |
1061 | { | |
1062 | m = n; | |
1063 | goto not_yes; | |
1064 | } | |
1065 | ||
1066 | matches++; | |
1067 | goto loop; | |
1068 | ||
1069 | case 'o': | |
1070 | ip = va_arg (argp, int *); | |
1071 | n = gfc_match_intrinsic_op ((gfc_intrinsic_op *) ip); | |
1072 | if (n != MATCH_YES) | |
1073 | { | |
1074 | m = n; | |
1075 | goto not_yes; | |
1076 | } | |
1077 | ||
1078 | matches++; | |
1079 | goto loop; | |
1080 | ||
1081 | case 't': | |
1082 | if (gfc_match_eos () != MATCH_YES) | |
1083 | { | |
1084 | m = MATCH_NO; | |
1085 | goto not_yes; | |
1086 | } | |
1087 | goto loop; | |
1088 | ||
1089 | case ' ': | |
1090 | if (gfc_match_space () == MATCH_YES) | |
1091 | goto loop; | |
1092 | m = MATCH_NO; | |
1093 | goto not_yes; | |
1094 | ||
1095 | case '%': | |
66e4ab31 | 1096 | break; /* Fall through to character matcher. */ |
6de9cd9a DN |
1097 | |
1098 | default: | |
1099 | gfc_internal_error ("gfc_match(): Bad match code %c", c); | |
1100 | } | |
1101 | ||
1102 | default: | |
befdf741 DK |
1103 | |
1104 | /* gfc_next_ascii_char converts characters to lower-case, so we shouldn't | |
1105 | expect an upper case character here! */ | |
1106 | gcc_assert (TOLOWER (c) == c); | |
1107 | ||
8fc541d3 | 1108 | if (c == gfc_next_ascii_char ()) |
6de9cd9a DN |
1109 | goto loop; |
1110 | break; | |
1111 | } | |
1112 | ||
1113 | not_yes: | |
1114 | va_end (argp); | |
1115 | ||
1116 | if (m != MATCH_YES) | |
1117 | { | |
1118 | /* Clean up after a failed match. */ | |
63645982 | 1119 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1120 | va_start (argp, target); |
1121 | ||
1122 | p = target; | |
1123 | for (; matches > 0; matches--) | |
1124 | { | |
1125 | while (*p++ != '%'); | |
1126 | ||
1127 | switch (*p++) | |
1128 | { | |
1129 | case '%': | |
1130 | matches++; | |
66e4ab31 | 1131 | break; /* Skip. */ |
6de9cd9a | 1132 | |
6de9cd9a DN |
1133 | /* Matches that don't have to be undone */ |
1134 | case 'o': | |
1135 | case 'l': | |
1136 | case 'n': | |
1137 | case 's': | |
b251af97 | 1138 | (void) va_arg (argp, void **); |
6de9cd9a DN |
1139 | break; |
1140 | ||
1141 | case 'e': | |
6de9cd9a | 1142 | case 'v': |
6de9cd9a | 1143 | vp = va_arg (argp, void **); |
ece3f663 | 1144 | gfc_free_expr ((struct gfc_expr *)*vp); |
6de9cd9a DN |
1145 | *vp = NULL; |
1146 | break; | |
1147 | } | |
1148 | } | |
1149 | ||
1150 | va_end (argp); | |
1151 | } | |
1152 | ||
1153 | return m; | |
1154 | } | |
1155 | ||
1156 | ||
1157 | /*********************** Statement level matching **********************/ | |
1158 | ||
1159 | /* Matches the start of a program unit, which is the program keyword | |
e08b5a75 | 1160 | followed by an obligatory symbol. */ |
6de9cd9a DN |
1161 | |
1162 | match | |
1163 | gfc_match_program (void) | |
1164 | { | |
1165 | gfc_symbol *sym; | |
1166 | match m; | |
1167 | ||
6de9cd9a DN |
1168 | m = gfc_match ("% %s%t", &sym); |
1169 | ||
1170 | if (m == MATCH_NO) | |
1171 | { | |
1172 | gfc_error ("Invalid form of PROGRAM statement at %C"); | |
1173 | m = MATCH_ERROR; | |
1174 | } | |
1175 | ||
1176 | if (m == MATCH_ERROR) | |
1177 | return m; | |
1178 | ||
524af0d6 | 1179 | if (!gfc_add_flavor (&sym->attr, FL_PROGRAM, sym->name, NULL)) |
6de9cd9a DN |
1180 | return MATCH_ERROR; |
1181 | ||
1182 | gfc_new_block = sym; | |
1183 | ||
1184 | return MATCH_YES; | |
1185 | } | |
1186 | ||
1187 | ||
1188 | /* Match a simple assignment statement. */ | |
1189 | ||
1190 | match | |
1191 | gfc_match_assignment (void) | |
1192 | { | |
1193 | gfc_expr *lvalue, *rvalue; | |
1194 | locus old_loc; | |
1195 | match m; | |
1196 | ||
63645982 | 1197 | old_loc = gfc_current_locus; |
6de9cd9a | 1198 | |
5056a350 | 1199 | lvalue = NULL; |
6de9cd9a DN |
1200 | m = gfc_match (" %v =", &lvalue); |
1201 | if (m != MATCH_YES) | |
c9583ed2 | 1202 | { |
5056a350 SK |
1203 | gfc_current_locus = old_loc; |
1204 | gfc_free_expr (lvalue); | |
1205 | return MATCH_NO; | |
c9583ed2 TS |
1206 | } |
1207 | ||
5056a350 | 1208 | rvalue = NULL; |
6de9cd9a DN |
1209 | m = gfc_match (" %e%t", &rvalue); |
1210 | if (m != MATCH_YES) | |
5056a350 SK |
1211 | { |
1212 | gfc_current_locus = old_loc; | |
1213 | gfc_free_expr (lvalue); | |
1214 | gfc_free_expr (rvalue); | |
1215 | return m; | |
1216 | } | |
6de9cd9a DN |
1217 | |
1218 | gfc_set_sym_referenced (lvalue->symtree->n.sym); | |
1219 | ||
1220 | new_st.op = EXEC_ASSIGN; | |
a513927a | 1221 | new_st.expr1 = lvalue; |
6de9cd9a DN |
1222 | new_st.expr2 = rvalue; |
1223 | ||
c9583ed2 TS |
1224 | gfc_check_do_variable (lvalue->symtree); |
1225 | ||
6de9cd9a | 1226 | return MATCH_YES; |
6de9cd9a DN |
1227 | } |
1228 | ||
1229 | ||
1230 | /* Match a pointer assignment statement. */ | |
1231 | ||
1232 | match | |
1233 | gfc_match_pointer_assignment (void) | |
1234 | { | |
1235 | gfc_expr *lvalue, *rvalue; | |
1236 | locus old_loc; | |
1237 | match m; | |
1238 | ||
63645982 | 1239 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1240 | |
1241 | lvalue = rvalue = NULL; | |
837c4b78 | 1242 | gfc_matching_ptr_assignment = 0; |
8fb74da4 | 1243 | gfc_matching_procptr_assignment = 0; |
6de9cd9a DN |
1244 | |
1245 | m = gfc_match (" %v =>", &lvalue); | |
1246 | if (m != MATCH_YES) | |
1247 | { | |
1248 | m = MATCH_NO; | |
1249 | goto cleanup; | |
1250 | } | |
1251 | ||
713485cc | 1252 | if (lvalue->symtree->n.sym->attr.proc_pointer |
2a573572 | 1253 | || gfc_is_proc_ptr_comp (lvalue)) |
8fb74da4 | 1254 | gfc_matching_procptr_assignment = 1; |
837c4b78 JW |
1255 | else |
1256 | gfc_matching_ptr_assignment = 1; | |
8fb74da4 | 1257 | |
6de9cd9a | 1258 | m = gfc_match (" %e%t", &rvalue); |
837c4b78 | 1259 | gfc_matching_ptr_assignment = 0; |
8fb74da4 | 1260 | gfc_matching_procptr_assignment = 0; |
6de9cd9a DN |
1261 | if (m != MATCH_YES) |
1262 | goto cleanup; | |
1263 | ||
1264 | new_st.op = EXEC_POINTER_ASSIGN; | |
a513927a | 1265 | new_st.expr1 = lvalue; |
6de9cd9a DN |
1266 | new_st.expr2 = rvalue; |
1267 | ||
1268 | return MATCH_YES; | |
1269 | ||
1270 | cleanup: | |
63645982 | 1271 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1272 | gfc_free_expr (lvalue); |
1273 | gfc_free_expr (rvalue); | |
1274 | return m; | |
1275 | } | |
1276 | ||
1277 | ||
43e1c5f7 | 1278 | /* We try to match an easy arithmetic IF statement. This only happens |
835d64ab FXC |
1279 | when just after having encountered a simple IF statement. This code |
1280 | is really duplicate with parts of the gfc_match_if code, but this is | |
1281 | *much* easier. */ | |
b251af97 | 1282 | |
f55e72ce | 1283 | static match |
835d64ab | 1284 | match_arithmetic_if (void) |
43e1c5f7 FXC |
1285 | { |
1286 | gfc_st_label *l1, *l2, *l3; | |
1287 | gfc_expr *expr; | |
1288 | match m; | |
1289 | ||
1290 | m = gfc_match (" ( %e ) %l , %l , %l%t", &expr, &l1, &l2, &l3); | |
1291 | if (m != MATCH_YES) | |
1292 | return m; | |
1293 | ||
524af0d6 JB |
1294 | if (!gfc_reference_st_label (l1, ST_LABEL_TARGET) |
1295 | || !gfc_reference_st_label (l2, ST_LABEL_TARGET) | |
1296 | || !gfc_reference_st_label (l3, ST_LABEL_TARGET)) | |
43e1c5f7 FXC |
1297 | { |
1298 | gfc_free_expr (expr); | |
1299 | return MATCH_ERROR; | |
1300 | } | |
1301 | ||
524af0d6 | 1302 | if (!gfc_notify_std (GFC_STD_F95_OBS, "Arithmetic IF statement at %C")) |
51c3f0f6 FXC |
1303 | return MATCH_ERROR; |
1304 | ||
43e1c5f7 | 1305 | new_st.op = EXEC_ARITHMETIC_IF; |
a513927a | 1306 | new_st.expr1 = expr; |
79bd1948 | 1307 | new_st.label1 = l1; |
43e1c5f7 FXC |
1308 | new_st.label2 = l2; |
1309 | new_st.label3 = l3; | |
1310 | ||
1311 | return MATCH_YES; | |
1312 | } | |
1313 | ||
1314 | ||
6de9cd9a DN |
1315 | /* The IF statement is a bit of a pain. First of all, there are three |
1316 | forms of it, the simple IF, the IF that starts a block and the | |
1317 | arithmetic IF. | |
1318 | ||
1319 | There is a problem with the simple IF and that is the fact that we | |
1320 | only have a single level of undo information on symbols. What this | |
1321 | means is for a simple IF, we must re-match the whole IF statement | |
1322 | multiple times in order to guarantee that the symbol table ends up | |
1323 | in the proper state. */ | |
1324 | ||
c874ae73 TS |
1325 | static match match_simple_forall (void); |
1326 | static match match_simple_where (void); | |
1327 | ||
6de9cd9a | 1328 | match |
b251af97 | 1329 | gfc_match_if (gfc_statement *if_type) |
6de9cd9a DN |
1330 | { |
1331 | gfc_expr *expr; | |
1332 | gfc_st_label *l1, *l2, *l3; | |
f9b9fb82 | 1333 | locus old_loc, old_loc2; |
6de9cd9a DN |
1334 | gfc_code *p; |
1335 | match m, n; | |
1336 | ||
1337 | n = gfc_match_label (); | |
1338 | if (n == MATCH_ERROR) | |
1339 | return n; | |
1340 | ||
63645982 | 1341 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1342 | |
1343 | m = gfc_match (" if ( %e", &expr); | |
1344 | if (m != MATCH_YES) | |
1345 | return m; | |
1346 | ||
f9b9fb82 JD |
1347 | old_loc2 = gfc_current_locus; |
1348 | gfc_current_locus = old_loc; | |
8b704316 | 1349 | |
f9b9fb82 JD |
1350 | if (gfc_match_parens () == MATCH_ERROR) |
1351 | return MATCH_ERROR; | |
1352 | ||
1353 | gfc_current_locus = old_loc2; | |
1354 | ||
6de9cd9a DN |
1355 | if (gfc_match_char (')') != MATCH_YES) |
1356 | { | |
1357 | gfc_error ("Syntax error in IF-expression at %C"); | |
1358 | gfc_free_expr (expr); | |
1359 | return MATCH_ERROR; | |
1360 | } | |
1361 | ||
1362 | m = gfc_match (" %l , %l , %l%t", &l1, &l2, &l3); | |
1363 | ||
1364 | if (m == MATCH_YES) | |
1365 | { | |
1366 | if (n == MATCH_YES) | |
1367 | { | |
b251af97 SK |
1368 | gfc_error ("Block label not appropriate for arithmetic IF " |
1369 | "statement at %C"); | |
6de9cd9a DN |
1370 | gfc_free_expr (expr); |
1371 | return MATCH_ERROR; | |
1372 | } | |
1373 | ||
524af0d6 JB |
1374 | if (!gfc_reference_st_label (l1, ST_LABEL_TARGET) |
1375 | || !gfc_reference_st_label (l2, ST_LABEL_TARGET) | |
1376 | || !gfc_reference_st_label (l3, ST_LABEL_TARGET)) | |
6de9cd9a | 1377 | { |
6de9cd9a DN |
1378 | gfc_free_expr (expr); |
1379 | return MATCH_ERROR; | |
1380 | } | |
8b704316 | 1381 | |
524af0d6 | 1382 | if (!gfc_notify_std (GFC_STD_F95_OBS, "Arithmetic IF statement at %C")) |
b251af97 | 1383 | return MATCH_ERROR; |
6de9cd9a DN |
1384 | |
1385 | new_st.op = EXEC_ARITHMETIC_IF; | |
a513927a | 1386 | new_st.expr1 = expr; |
79bd1948 | 1387 | new_st.label1 = l1; |
6de9cd9a DN |
1388 | new_st.label2 = l2; |
1389 | new_st.label3 = l3; | |
1390 | ||
1391 | *if_type = ST_ARITHMETIC_IF; | |
1392 | return MATCH_YES; | |
1393 | } | |
1394 | ||
172b8799 | 1395 | if (gfc_match (" then%t") == MATCH_YES) |
6de9cd9a DN |
1396 | { |
1397 | new_st.op = EXEC_IF; | |
a513927a | 1398 | new_st.expr1 = expr; |
6de9cd9a DN |
1399 | *if_type = ST_IF_BLOCK; |
1400 | return MATCH_YES; | |
1401 | } | |
1402 | ||
1403 | if (n == MATCH_YES) | |
1404 | { | |
f9b9fb82 | 1405 | gfc_error ("Block label is not appropriate for IF statement at %C"); |
6de9cd9a DN |
1406 | gfc_free_expr (expr); |
1407 | return MATCH_ERROR; | |
1408 | } | |
1409 | ||
1410 | /* At this point the only thing left is a simple IF statement. At | |
1411 | this point, n has to be MATCH_NO, so we don't have to worry about | |
1412 | re-matching a block label. From what we've got so far, try | |
1413 | matching an assignment. */ | |
1414 | ||
1415 | *if_type = ST_SIMPLE_IF; | |
1416 | ||
1417 | m = gfc_match_assignment (); | |
1418 | if (m == MATCH_YES) | |
1419 | goto got_match; | |
1420 | ||
1421 | gfc_free_expr (expr); | |
1422 | gfc_undo_symbols (); | |
63645982 | 1423 | gfc_current_locus = old_loc; |
6de9cd9a | 1424 | |
5056a350 SK |
1425 | /* m can be MATCH_NO or MATCH_ERROR, here. For MATCH_ERROR, a mangled |
1426 | assignment was found. For MATCH_NO, continue to call the various | |
1427 | matchers. */ | |
17bbca74 SK |
1428 | if (m == MATCH_ERROR) |
1429 | return MATCH_ERROR; | |
1430 | ||
66e4ab31 | 1431 | gfc_match (" if ( %e ) ", &expr); /* Guaranteed to match. */ |
6de9cd9a DN |
1432 | |
1433 | m = gfc_match_pointer_assignment (); | |
1434 | if (m == MATCH_YES) | |
1435 | goto got_match; | |
1436 | ||
1437 | gfc_free_expr (expr); | |
1438 | gfc_undo_symbols (); | |
63645982 | 1439 | gfc_current_locus = old_loc; |
6de9cd9a | 1440 | |
66e4ab31 | 1441 | gfc_match (" if ( %e ) ", &expr); /* Guaranteed to match. */ |
6de9cd9a DN |
1442 | |
1443 | /* Look at the next keyword to see which matcher to call. Matching | |
1444 | the keyword doesn't affect the symbol table, so we don't have to | |
1445 | restore between tries. */ | |
1446 | ||
1447 | #define match(string, subr, statement) \ | |
524af0d6 | 1448 | if (gfc_match (string) == MATCH_YES) { m = subr(); goto got_match; } |
6de9cd9a DN |
1449 | |
1450 | gfc_clear_error (); | |
1451 | ||
1452 | match ("allocate", gfc_match_allocate, ST_ALLOCATE) | |
5056a350 SK |
1453 | match ("assign", gfc_match_assign, ST_LABEL_ASSIGNMENT) |
1454 | match ("backspace", gfc_match_backspace, ST_BACKSPACE) | |
1455 | match ("call", gfc_match_call, ST_CALL) | |
1456 | match ("close", gfc_match_close, ST_CLOSE) | |
1457 | match ("continue", gfc_match_continue, ST_CONTINUE) | |
1458 | match ("cycle", gfc_match_cycle, ST_CYCLE) | |
1459 | match ("deallocate", gfc_match_deallocate, ST_DEALLOCATE) | |
1460 | match ("end file", gfc_match_endfile, ST_END_FILE) | |
d0a4a61c | 1461 | match ("error stop", gfc_match_error_stop, ST_ERROR_STOP) |
5056a350 SK |
1462 | match ("exit", gfc_match_exit, ST_EXIT) |
1463 | match ("flush", gfc_match_flush, ST_FLUSH) | |
1464 | match ("forall", match_simple_forall, ST_FORALL) | |
1465 | match ("go to", gfc_match_goto, ST_GOTO) | |
1466 | match ("if", match_arithmetic_if, ST_ARITHMETIC_IF) | |
1467 | match ("inquire", gfc_match_inquire, ST_INQUIRE) | |
5493aa17 | 1468 | match ("lock", gfc_match_lock, ST_LOCK) |
5056a350 SK |
1469 | match ("nullify", gfc_match_nullify, ST_NULLIFY) |
1470 | match ("open", gfc_match_open, ST_OPEN) | |
1471 | match ("pause", gfc_match_pause, ST_NONE) | |
1472 | match ("print", gfc_match_print, ST_WRITE) | |
1473 | match ("read", gfc_match_read, ST_READ) | |
1474 | match ("return", gfc_match_return, ST_RETURN) | |
1475 | match ("rewind", gfc_match_rewind, ST_REWIND) | |
1476 | match ("stop", gfc_match_stop, ST_STOP) | |
6f0f0b2e | 1477 | match ("wait", gfc_match_wait, ST_WAIT) |
d0a4a61c TB |
1478 | match ("sync all", gfc_match_sync_all, ST_SYNC_CALL); |
1479 | match ("sync images", gfc_match_sync_images, ST_SYNC_IMAGES); | |
1480 | match ("sync memory", gfc_match_sync_memory, ST_SYNC_MEMORY); | |
5493aa17 | 1481 | match ("unlock", gfc_match_unlock, ST_UNLOCK) |
5056a350 SK |
1482 | match ("where", match_simple_where, ST_WHERE) |
1483 | match ("write", gfc_match_write, ST_WRITE) | |
1484 | ||
1485 | /* The gfc_match_assignment() above may have returned a MATCH_NO | |
8b704316 | 1486 | where the assignment was to a named constant. Check that |
5056a350 SK |
1487 | special case here. */ |
1488 | m = gfc_match_assignment (); | |
1489 | if (m == MATCH_NO) | |
1490 | { | |
1491 | gfc_error ("Cannot assign to a named constant at %C"); | |
1492 | gfc_free_expr (expr); | |
1493 | gfc_undo_symbols (); | |
1494 | gfc_current_locus = old_loc; | |
1495 | return MATCH_ERROR; | |
1496 | } | |
6de9cd9a DN |
1497 | |
1498 | /* All else has failed, so give up. See if any of the matchers has | |
1499 | stored an error message of some sort. */ | |
b5a9fd3e | 1500 | if (!gfc_error_check ()) |
6de9cd9a DN |
1501 | gfc_error ("Unclassifiable statement in IF-clause at %C"); |
1502 | ||
1503 | gfc_free_expr (expr); | |
1504 | return MATCH_ERROR; | |
1505 | ||
1506 | got_match: | |
1507 | if (m == MATCH_NO) | |
1508 | gfc_error ("Syntax error in IF-clause at %C"); | |
1509 | if (m != MATCH_YES) | |
1510 | { | |
1511 | gfc_free_expr (expr); | |
1512 | return MATCH_ERROR; | |
1513 | } | |
1514 | ||
1515 | /* At this point, we've matched the single IF and the action clause | |
1516 | is in new_st. Rearrange things so that the IF statement appears | |
1517 | in new_st. */ | |
1518 | ||
11e5274a JW |
1519 | p = gfc_get_code (EXEC_IF); |
1520 | p->next = XCNEW (gfc_code); | |
6de9cd9a | 1521 | *p->next = new_st; |
63645982 | 1522 | p->next->loc = gfc_current_locus; |
6de9cd9a | 1523 | |
a513927a | 1524 | p->expr1 = expr; |
6de9cd9a DN |
1525 | |
1526 | gfc_clear_new_st (); | |
1527 | ||
1528 | new_st.op = EXEC_IF; | |
1529 | new_st.block = p; | |
1530 | ||
1531 | return MATCH_YES; | |
1532 | } | |
1533 | ||
1534 | #undef match | |
1535 | ||
1536 | ||
1537 | /* Match an ELSE statement. */ | |
1538 | ||
1539 | match | |
1540 | gfc_match_else (void) | |
1541 | { | |
1542 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1543 | ||
1544 | if (gfc_match_eos () == MATCH_YES) | |
1545 | return MATCH_YES; | |
1546 | ||
1547 | if (gfc_match_name (name) != MATCH_YES | |
1548 | || gfc_current_block () == NULL | |
1549 | || gfc_match_eos () != MATCH_YES) | |
1550 | { | |
1551 | gfc_error ("Unexpected junk after ELSE statement at %C"); | |
1552 | return MATCH_ERROR; | |
1553 | } | |
1554 | ||
1555 | if (strcmp (name, gfc_current_block ()->name) != 0) | |
1556 | { | |
1557 | gfc_error ("Label '%s' at %C doesn't match IF label '%s'", | |
1558 | name, gfc_current_block ()->name); | |
1559 | return MATCH_ERROR; | |
1560 | } | |
1561 | ||
1562 | return MATCH_YES; | |
1563 | } | |
1564 | ||
1565 | ||
1566 | /* Match an ELSE IF statement. */ | |
1567 | ||
1568 | match | |
1569 | gfc_match_elseif (void) | |
1570 | { | |
1571 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1572 | gfc_expr *expr; | |
1573 | match m; | |
1574 | ||
1575 | m = gfc_match (" ( %e ) then", &expr); | |
1576 | if (m != MATCH_YES) | |
1577 | return m; | |
1578 | ||
1579 | if (gfc_match_eos () == MATCH_YES) | |
1580 | goto done; | |
1581 | ||
1582 | if (gfc_match_name (name) != MATCH_YES | |
1583 | || gfc_current_block () == NULL | |
1584 | || gfc_match_eos () != MATCH_YES) | |
1585 | { | |
1586 | gfc_error ("Unexpected junk after ELSE IF statement at %C"); | |
1587 | goto cleanup; | |
1588 | } | |
1589 | ||
1590 | if (strcmp (name, gfc_current_block ()->name) != 0) | |
1591 | { | |
1592 | gfc_error ("Label '%s' at %C doesn't match IF label '%s'", | |
1593 | name, gfc_current_block ()->name); | |
1594 | goto cleanup; | |
1595 | } | |
1596 | ||
1597 | done: | |
1598 | new_st.op = EXEC_IF; | |
a513927a | 1599 | new_st.expr1 = expr; |
6de9cd9a DN |
1600 | return MATCH_YES; |
1601 | ||
1602 | cleanup: | |
1603 | gfc_free_expr (expr); | |
1604 | return MATCH_ERROR; | |
1605 | } | |
1606 | ||
1607 | ||
1608 | /* Free a gfc_iterator structure. */ | |
1609 | ||
1610 | void | |
b251af97 | 1611 | gfc_free_iterator (gfc_iterator *iter, int flag) |
6de9cd9a | 1612 | { |
66e4ab31 | 1613 | |
6de9cd9a DN |
1614 | if (iter == NULL) |
1615 | return; | |
1616 | ||
1617 | gfc_free_expr (iter->var); | |
1618 | gfc_free_expr (iter->start); | |
1619 | gfc_free_expr (iter->end); | |
1620 | gfc_free_expr (iter->step); | |
1621 | ||
1622 | if (flag) | |
cede9502 | 1623 | free (iter); |
6de9cd9a DN |
1624 | } |
1625 | ||
1626 | ||
d0a4a61c TB |
1627 | /* Match a CRITICAL statement. */ |
1628 | match | |
1629 | gfc_match_critical (void) | |
1630 | { | |
1631 | gfc_st_label *label = NULL; | |
1632 | ||
1633 | if (gfc_match_label () == MATCH_ERROR) | |
1634 | return MATCH_ERROR; | |
1635 | ||
1636 | if (gfc_match (" critical") != MATCH_YES) | |
1637 | return MATCH_NO; | |
1638 | ||
1639 | if (gfc_match_st_label (&label) == MATCH_ERROR) | |
1640 | return MATCH_ERROR; | |
1641 | ||
1642 | if (gfc_match_eos () != MATCH_YES) | |
1643 | { | |
1644 | gfc_syntax_error (ST_CRITICAL); | |
1645 | return MATCH_ERROR; | |
1646 | } | |
1647 | ||
1648 | if (gfc_pure (NULL)) | |
1649 | { | |
1650 | gfc_error ("Image control statement CRITICAL at %C in PURE procedure"); | |
1651 | return MATCH_ERROR; | |
1652 | } | |
1653 | ||
524af0d6 | 1654 | if (gfc_find_state (COMP_DO_CONCURRENT)) |
8c6a85e3 TB |
1655 | { |
1656 | gfc_error ("Image control statement CRITICAL at %C in DO CONCURRENT " | |
1657 | "block"); | |
1658 | return MATCH_ERROR; | |
1659 | } | |
1660 | ||
ccd7751b | 1661 | gfc_unset_implicit_pure (NULL); |
f1f39033 | 1662 | |
524af0d6 | 1663 | if (!gfc_notify_std (GFC_STD_F2008, "CRITICAL statement at %C")) |
d0a4a61c TB |
1664 | return MATCH_ERROR; |
1665 | ||
f4d1d50a TB |
1666 | if (gfc_option.coarray == GFC_FCOARRAY_NONE) |
1667 | { | |
ddc05d11 TB |
1668 | gfc_fatal_error ("Coarrays disabled at %C, use %<-fcoarray=%> to " |
1669 | "enable"); | |
f4d1d50a TB |
1670 | return MATCH_ERROR; |
1671 | } | |
1672 | ||
524af0d6 | 1673 | if (gfc_find_state (COMP_CRITICAL)) |
d0a4a61c TB |
1674 | { |
1675 | gfc_error ("Nested CRITICAL block at %C"); | |
1676 | return MATCH_ERROR; | |
1677 | } | |
1678 | ||
1679 | new_st.op = EXEC_CRITICAL; | |
1680 | ||
1681 | if (label != NULL | |
524af0d6 | 1682 | && !gfc_reference_st_label (label, ST_LABEL_TARGET)) |
d0a4a61c TB |
1683 | return MATCH_ERROR; |
1684 | ||
1685 | return MATCH_YES; | |
1686 | } | |
1687 | ||
1688 | ||
9abe5e56 DK |
1689 | /* Match a BLOCK statement. */ |
1690 | ||
1691 | match | |
1692 | gfc_match_block (void) | |
1693 | { | |
1694 | match m; | |
1695 | ||
1696 | if (gfc_match_label () == MATCH_ERROR) | |
1697 | return MATCH_ERROR; | |
1698 | ||
1699 | if (gfc_match (" block") != MATCH_YES) | |
1700 | return MATCH_NO; | |
1701 | ||
1702 | /* For this to be a correct BLOCK statement, the line must end now. */ | |
1703 | m = gfc_match_eos (); | |
1704 | if (m == MATCH_ERROR) | |
1705 | return MATCH_ERROR; | |
1706 | if (m == MATCH_NO) | |
1707 | return MATCH_NO; | |
1708 | ||
1709 | return MATCH_YES; | |
1710 | } | |
1711 | ||
1712 | ||
03af1e4c DK |
1713 | /* Match an ASSOCIATE statement. */ |
1714 | ||
1715 | match | |
1716 | gfc_match_associate (void) | |
1717 | { | |
1718 | if (gfc_match_label () == MATCH_ERROR) | |
1719 | return MATCH_ERROR; | |
1720 | ||
1721 | if (gfc_match (" associate") != MATCH_YES) | |
1722 | return MATCH_NO; | |
1723 | ||
1724 | /* Match the association list. */ | |
1725 | if (gfc_match_char ('(') != MATCH_YES) | |
1726 | { | |
1727 | gfc_error ("Expected association list at %C"); | |
1728 | return MATCH_ERROR; | |
1729 | } | |
1730 | new_st.ext.block.assoc = NULL; | |
1731 | while (true) | |
1732 | { | |
1733 | gfc_association_list* newAssoc = gfc_get_association_list (); | |
1734 | gfc_association_list* a; | |
1735 | ||
1736 | /* Match the next association. */ | |
1737 | if (gfc_match (" %n => %e", newAssoc->name, &newAssoc->target) | |
1738 | != MATCH_YES) | |
1739 | { | |
1740 | gfc_error ("Expected association at %C"); | |
1741 | goto assocListError; | |
1742 | } | |
571d54de | 1743 | newAssoc->where = gfc_current_locus; |
03af1e4c DK |
1744 | |
1745 | /* Check that the current name is not yet in the list. */ | |
1746 | for (a = new_st.ext.block.assoc; a; a = a->next) | |
1747 | if (!strcmp (a->name, newAssoc->name)) | |
1748 | { | |
1749 | gfc_error ("Duplicate name '%s' in association at %C", | |
1750 | newAssoc->name); | |
1751 | goto assocListError; | |
1752 | } | |
1753 | ||
1754 | /* The target expression must not be coindexed. */ | |
1755 | if (gfc_is_coindexed (newAssoc->target)) | |
1756 | { | |
1757 | gfc_error ("Association target at %C must not be coindexed"); | |
1758 | goto assocListError; | |
1759 | } | |
1760 | ||
571d54de DK |
1761 | /* The `variable' field is left blank for now; because the target is not |
1762 | yet resolved, we can't use gfc_has_vector_subscript to determine it | |
8c91ab34 | 1763 | for now. This is set during resolution. */ |
03af1e4c DK |
1764 | |
1765 | /* Put it into the list. */ | |
1766 | newAssoc->next = new_st.ext.block.assoc; | |
1767 | new_st.ext.block.assoc = newAssoc; | |
1768 | ||
1769 | /* Try next one or end if closing parenthesis is found. */ | |
1770 | gfc_gobble_whitespace (); | |
1771 | if (gfc_peek_char () == ')') | |
1772 | break; | |
1773 | if (gfc_match_char (',') != MATCH_YES) | |
1774 | { | |
1775 | gfc_error ("Expected ')' or ',' at %C"); | |
1776 | return MATCH_ERROR; | |
1777 | } | |
1778 | ||
1779 | continue; | |
1780 | ||
1781 | assocListError: | |
cede9502 | 1782 | free (newAssoc); |
03af1e4c DK |
1783 | goto error; |
1784 | } | |
1785 | if (gfc_match_char (')') != MATCH_YES) | |
1786 | { | |
1787 | /* This should never happen as we peek above. */ | |
1788 | gcc_unreachable (); | |
1789 | } | |
1790 | ||
1791 | if (gfc_match_eos () != MATCH_YES) | |
1792 | { | |
1793 | gfc_error ("Junk after ASSOCIATE statement at %C"); | |
1794 | goto error; | |
1795 | } | |
1796 | ||
1797 | return MATCH_YES; | |
1798 | ||
1799 | error: | |
1800 | gfc_free_association_list (new_st.ext.block.assoc); | |
1801 | return MATCH_ERROR; | |
1802 | } | |
1803 | ||
1804 | ||
8c6a85e3 TB |
1805 | /* Match a Fortran 2003 derived-type-spec (F03:R455), which is just the name of |
1806 | an accessible derived type. */ | |
6de9cd9a | 1807 | |
8c6a85e3 TB |
1808 | static match |
1809 | match_derived_type_spec (gfc_typespec *ts) | |
6de9cd9a | 1810 | { |
8c6a85e3 | 1811 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
8b704316 | 1812 | locus old_locus; |
8c6a85e3 | 1813 | gfc_symbol *derived; |
6de9cd9a | 1814 | |
8c6a85e3 | 1815 | old_locus = gfc_current_locus; |
6de9cd9a | 1816 | |
8c6a85e3 TB |
1817 | if (gfc_match ("%n", name) != MATCH_YES) |
1818 | { | |
1819 | gfc_current_locus = old_locus; | |
1820 | return MATCH_NO; | |
1821 | } | |
6de9cd9a | 1822 | |
8c6a85e3 | 1823 | gfc_find_symbol (name, NULL, 1, &derived); |
6de9cd9a | 1824 | |
c3f34952 TB |
1825 | if (derived && derived->attr.flavor == FL_PROCEDURE && derived->attr.generic) |
1826 | derived = gfc_find_dt_in_generic (derived); | |
1827 | ||
8c6a85e3 TB |
1828 | if (derived && derived->attr.flavor == FL_DERIVED) |
1829 | { | |
1830 | ts->type = BT_DERIVED; | |
1831 | ts->u.derived = derived; | |
1832 | return MATCH_YES; | |
1833 | } | |
6de9cd9a | 1834 | |
8b704316 | 1835 | gfc_current_locus = old_locus; |
8c6a85e3 TB |
1836 | return MATCH_NO; |
1837 | } | |
9b089e05 | 1838 | |
6de9cd9a | 1839 | |
8c6a85e3 TB |
1840 | /* Match a Fortran 2003 type-spec (F03:R401). This is similar to |
1841 | gfc_match_decl_type_spec() from decl.c, with the following exceptions: | |
1842 | It only includes the intrinsic types from the Fortran 2003 standard | |
1843 | (thus, neither BYTE nor forms like REAL*4 are allowed). Additionally, | |
1844 | the implicit_flag is not needed, so it was removed. Derived types are | |
1845 | identified by their name alone. */ | |
1846 | ||
894460a7 TB |
1847 | match |
1848 | gfc_match_type_spec (gfc_typespec *ts) | |
8c6a85e3 TB |
1849 | { |
1850 | match m; | |
1851 | locus old_locus; | |
1852 | ||
1853 | gfc_clear_ts (ts); | |
1854 | gfc_gobble_whitespace (); | |
1855 | old_locus = gfc_current_locus; | |
1856 | ||
1857 | if (match_derived_type_spec (ts) == MATCH_YES) | |
6de9cd9a | 1858 | { |
8c6a85e3 TB |
1859 | /* Enforce F03:C401. */ |
1860 | if (ts->u.derived->attr.abstract) | |
1861 | { | |
1862 | gfc_error ("Derived type '%s' at %L may not be ABSTRACT", | |
1863 | ts->u.derived->name, &old_locus); | |
1864 | return MATCH_ERROR; | |
1865 | } | |
1866 | return MATCH_YES; | |
6de9cd9a DN |
1867 | } |
1868 | ||
8c6a85e3 TB |
1869 | if (gfc_match ("integer") == MATCH_YES) |
1870 | { | |
1871 | ts->type = BT_INTEGER; | |
1872 | ts->kind = gfc_default_integer_kind; | |
1873 | goto kind_selector; | |
1874 | } | |
6de9cd9a | 1875 | |
8c6a85e3 TB |
1876 | if (gfc_match ("real") == MATCH_YES) |
1877 | { | |
1878 | ts->type = BT_REAL; | |
1879 | ts->kind = gfc_default_real_kind; | |
1880 | goto kind_selector; | |
1881 | } | |
acb388a0 | 1882 | |
8c6a85e3 | 1883 | if (gfc_match ("double precision") == MATCH_YES) |
6de9cd9a | 1884 | { |
8c6a85e3 TB |
1885 | ts->type = BT_REAL; |
1886 | ts->kind = gfc_default_double_kind; | |
1887 | return MATCH_YES; | |
6de9cd9a DN |
1888 | } |
1889 | ||
8c6a85e3 TB |
1890 | if (gfc_match ("complex") == MATCH_YES) |
1891 | { | |
1892 | ts->type = BT_COMPLEX; | |
1893 | ts->kind = gfc_default_complex_kind; | |
1894 | goto kind_selector; | |
1895 | } | |
6de9cd9a | 1896 | |
8c6a85e3 TB |
1897 | if (gfc_match ("character") == MATCH_YES) |
1898 | { | |
1899 | ts->type = BT_CHARACTER; | |
6de9cd9a | 1900 | |
8c6a85e3 | 1901 | m = gfc_match_char_spec (ts); |
6de9cd9a | 1902 | |
8c6a85e3 TB |
1903 | if (m == MATCH_NO) |
1904 | m = MATCH_YES; | |
6de9cd9a | 1905 | |
8c6a85e3 TB |
1906 | return m; |
1907 | } | |
c9583ed2 | 1908 | |
8c6a85e3 | 1909 | if (gfc_match ("logical") == MATCH_YES) |
6de9cd9a | 1910 | { |
8c6a85e3 TB |
1911 | ts->type = BT_LOGICAL; |
1912 | ts->kind = gfc_default_logical_kind; | |
1913 | goto kind_selector; | |
6de9cd9a DN |
1914 | } |
1915 | ||
8c6a85e3 TB |
1916 | /* If a type is not matched, simply return MATCH_NO. */ |
1917 | gfc_current_locus = old_locus; | |
1918 | return MATCH_NO; | |
6de9cd9a | 1919 | |
8c6a85e3 | 1920 | kind_selector: |
6de9cd9a | 1921 | |
8c6a85e3 TB |
1922 | gfc_gobble_whitespace (); |
1923 | if (gfc_peek_ascii_char () == '*') | |
6de9cd9a | 1924 | { |
8c6a85e3 TB |
1925 | gfc_error ("Invalid type-spec at %C"); |
1926 | return MATCH_ERROR; | |
6de9cd9a DN |
1927 | } |
1928 | ||
8c6a85e3 | 1929 | m = gfc_match_kind_spec (ts, false); |
6de9cd9a | 1930 | |
8c6a85e3 TB |
1931 | if (m == MATCH_NO) |
1932 | m = MATCH_YES; /* No kind specifier found. */ | |
6de9cd9a | 1933 | |
8c6a85e3 | 1934 | return m; |
6de9cd9a DN |
1935 | } |
1936 | ||
1937 | ||
8c6a85e3 | 1938 | /******************** FORALL subroutines ********************/ |
6de9cd9a | 1939 | |
8c6a85e3 TB |
1940 | /* Free a list of FORALL iterators. */ |
1941 | ||
1942 | void | |
1943 | gfc_free_forall_iterator (gfc_forall_iterator *iter) | |
6de9cd9a | 1944 | { |
8c6a85e3 | 1945 | gfc_forall_iterator *next; |
6de9cd9a | 1946 | |
8c6a85e3 | 1947 | while (iter) |
6de9cd9a | 1948 | { |
8c6a85e3 TB |
1949 | next = iter->next; |
1950 | gfc_free_expr (iter->var); | |
1951 | gfc_free_expr (iter->start); | |
1952 | gfc_free_expr (iter->end); | |
1953 | gfc_free_expr (iter->stride); | |
1954 | free (iter); | |
1955 | iter = next; | |
1956 | } | |
1957 | } | |
61b644c2 | 1958 | |
6de9cd9a | 1959 | |
8c6a85e3 | 1960 | /* Match an iterator as part of a FORALL statement. The format is: |
61b644c2 | 1961 | |
8c6a85e3 | 1962 | <var> = <start>:<end>[:<stride>] |
6de9cd9a | 1963 | |
8c6a85e3 TB |
1964 | On MATCH_NO, the caller tests for the possibility that there is a |
1965 | scalar mask expression. */ | |
6de9cd9a | 1966 | |
8c6a85e3 TB |
1967 | static match |
1968 | match_forall_iterator (gfc_forall_iterator **result) | |
1969 | { | |
1970 | gfc_forall_iterator *iter; | |
1971 | locus where; | |
1972 | match m; | |
6de9cd9a | 1973 | |
8c6a85e3 TB |
1974 | where = gfc_current_locus; |
1975 | iter = XCNEW (gfc_forall_iterator); | |
6de9cd9a | 1976 | |
8c6a85e3 TB |
1977 | m = gfc_match_expr (&iter->var); |
1978 | if (m != MATCH_YES) | |
1979 | goto cleanup; | |
1980 | ||
1981 | if (gfc_match_char ('=') != MATCH_YES | |
1982 | || iter->var->expr_type != EXPR_VARIABLE) | |
e5ca9693 | 1983 | { |
8c6a85e3 TB |
1984 | m = MATCH_NO; |
1985 | goto cleanup; | |
1986 | } | |
e5ca9693 | 1987 | |
8c6a85e3 TB |
1988 | m = gfc_match_expr (&iter->start); |
1989 | if (m != MATCH_YES) | |
1990 | goto cleanup; | |
e5ca9693 | 1991 | |
8c6a85e3 TB |
1992 | if (gfc_match_char (':') != MATCH_YES) |
1993 | goto syntax; | |
e5ca9693 | 1994 | |
8c6a85e3 TB |
1995 | m = gfc_match_expr (&iter->end); |
1996 | if (m == MATCH_NO) | |
1997 | goto syntax; | |
1998 | if (m == MATCH_ERROR) | |
1999 | goto cleanup; | |
84fa59a7 | 2000 | |
8c6a85e3 TB |
2001 | if (gfc_match_char (':') == MATCH_NO) |
2002 | iter->stride = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1); | |
2003 | else | |
6c7a4dfd | 2004 | { |
8c6a85e3 TB |
2005 | m = gfc_match_expr (&iter->stride); |
2006 | if (m == MATCH_NO) | |
2007 | goto syntax; | |
2008 | if (m == MATCH_ERROR) | |
2009 | goto cleanup; | |
6c7a4dfd JJ |
2010 | } |
2011 | ||
8c6a85e3 TB |
2012 | /* Mark the iteration variable's symbol as used as a FORALL index. */ |
2013 | iter->var->symtree->n.sym->forall_index = true; | |
6de9cd9a | 2014 | |
8c6a85e3 | 2015 | *result = iter; |
6de9cd9a | 2016 | return MATCH_YES; |
6de9cd9a | 2017 | |
8c6a85e3 TB |
2018 | syntax: |
2019 | gfc_error ("Syntax error in FORALL iterator at %C"); | |
2020 | m = MATCH_ERROR; | |
6de9cd9a | 2021 | |
8c6a85e3 | 2022 | cleanup: |
6de9cd9a | 2023 | |
8c6a85e3 TB |
2024 | gfc_current_locus = where; |
2025 | gfc_free_forall_iterator (iter); | |
2026 | return m; | |
6de9cd9a DN |
2027 | } |
2028 | ||
2029 | ||
8c6a85e3 | 2030 | /* Match the header of a FORALL statement. */ |
6de9cd9a DN |
2031 | |
2032 | static match | |
8c6a85e3 | 2033 | match_forall_header (gfc_forall_iterator **phead, gfc_expr **mask) |
6de9cd9a | 2034 | { |
8c6a85e3 TB |
2035 | gfc_forall_iterator *head, *tail, *new_iter; |
2036 | gfc_expr *msk; | |
6de9cd9a DN |
2037 | match m; |
2038 | ||
8c6a85e3 | 2039 | gfc_gobble_whitespace (); |
6de9cd9a | 2040 | |
8c6a85e3 TB |
2041 | head = tail = NULL; |
2042 | msk = NULL; | |
6de9cd9a | 2043 | |
8c6a85e3 TB |
2044 | if (gfc_match_char ('(') != MATCH_YES) |
2045 | return MATCH_NO; | |
6d1b0f92 | 2046 | |
8c6a85e3 TB |
2047 | m = match_forall_iterator (&new_iter); |
2048 | if (m == MATCH_ERROR) | |
2049 | goto cleanup; | |
2050 | if (m == MATCH_NO) | |
2051 | goto syntax; | |
6de9cd9a | 2052 | |
8c6a85e3 | 2053 | head = tail = new_iter; |
f1f39033 | 2054 | |
8c6a85e3 | 2055 | for (;;) |
d0a4a61c | 2056 | { |
8c6a85e3 TB |
2057 | if (gfc_match_char (',') != MATCH_YES) |
2058 | break; | |
d0a4a61c | 2059 | |
8c6a85e3 TB |
2060 | m = match_forall_iterator (&new_iter); |
2061 | if (m == MATCH_ERROR) | |
2062 | goto cleanup; | |
5d2d72cb | 2063 | |
8c6a85e3 | 2064 | if (m == MATCH_YES) |
5d2d72cb | 2065 | { |
8c6a85e3 TB |
2066 | tail->next = new_iter; |
2067 | tail = new_iter; | |
2068 | continue; | |
6d1b0f92 JD |
2069 | } |
2070 | ||
8c6a85e3 | 2071 | /* Have to have a mask expression. */ |
6d1b0f92 | 2072 | |
8c6a85e3 TB |
2073 | m = gfc_match_expr (&msk); |
2074 | if (m == MATCH_NO) | |
2075 | goto syntax; | |
2076 | if (m == MATCH_ERROR) | |
2077 | goto cleanup; | |
6d1b0f92 | 2078 | |
d0a4a61c | 2079 | break; |
d0a4a61c TB |
2080 | } |
2081 | ||
8c6a85e3 TB |
2082 | if (gfc_match_char (')') == MATCH_NO) |
2083 | goto syntax; | |
6de9cd9a | 2084 | |
8c6a85e3 TB |
2085 | *phead = head; |
2086 | *mask = msk; | |
6de9cd9a DN |
2087 | return MATCH_YES; |
2088 | ||
2089 | syntax: | |
8c6a85e3 | 2090 | gfc_syntax_error (ST_FORALL); |
6de9cd9a DN |
2091 | |
2092 | cleanup: | |
8c6a85e3 TB |
2093 | gfc_free_expr (msk); |
2094 | gfc_free_forall_iterator (head); | |
6de9cd9a | 2095 | |
6de9cd9a DN |
2096 | return MATCH_ERROR; |
2097 | } | |
2098 | ||
8b704316 | 2099 | /* Match the rest of a simple FORALL statement that follows an |
8c6a85e3 | 2100 | IF statement. */ |
66e4ab31 | 2101 | |
8c6a85e3 TB |
2102 | static match |
2103 | match_simple_forall (void) | |
6de9cd9a | 2104 | { |
8c6a85e3 TB |
2105 | gfc_forall_iterator *head; |
2106 | gfc_expr *mask; | |
2107 | gfc_code *c; | |
6de9cd9a DN |
2108 | match m; |
2109 | ||
8c6a85e3 TB |
2110 | mask = NULL; |
2111 | head = NULL; | |
2112 | c = NULL; | |
6de9cd9a | 2113 | |
8c6a85e3 | 2114 | m = match_forall_header (&head, &mask); |
6de9cd9a | 2115 | |
8c6a85e3 TB |
2116 | if (m == MATCH_NO) |
2117 | goto syntax; | |
2118 | if (m != MATCH_YES) | |
2119 | goto cleanup; | |
6de9cd9a | 2120 | |
8c6a85e3 | 2121 | m = gfc_match_assignment (); |
6de9cd9a | 2122 | |
8c6a85e3 TB |
2123 | if (m == MATCH_ERROR) |
2124 | goto cleanup; | |
2125 | if (m == MATCH_NO) | |
2126 | { | |
2127 | m = gfc_match_pointer_assignment (); | |
2128 | if (m == MATCH_ERROR) | |
2129 | goto cleanup; | |
2130 | if (m == MATCH_NO) | |
2131 | goto syntax; | |
2132 | } | |
6de9cd9a | 2133 | |
11e5274a | 2134 | c = XCNEW (gfc_code); |
8c6a85e3 TB |
2135 | *c = new_st; |
2136 | c->loc = gfc_current_locus; | |
d0a4a61c | 2137 | |
8c6a85e3 TB |
2138 | if (gfc_match_eos () != MATCH_YES) |
2139 | goto syntax; | |
d0a4a61c | 2140 | |
8c6a85e3 TB |
2141 | gfc_clear_new_st (); |
2142 | new_st.op = EXEC_FORALL; | |
2143 | new_st.expr1 = mask; | |
2144 | new_st.ext.forall_iterator = head; | |
11e5274a | 2145 | new_st.block = gfc_get_code (EXEC_FORALL); |
8c6a85e3 | 2146 | new_st.block->next = c; |
d0a4a61c | 2147 | |
8c6a85e3 | 2148 | return MATCH_YES; |
5493aa17 | 2149 | |
8c6a85e3 TB |
2150 | syntax: |
2151 | gfc_syntax_error (ST_FORALL); | |
5493aa17 | 2152 | |
8c6a85e3 TB |
2153 | cleanup: |
2154 | gfc_free_forall_iterator (head); | |
2155 | gfc_free_expr (mask); | |
5493aa17 | 2156 | |
8c6a85e3 TB |
2157 | return MATCH_ERROR; |
2158 | } | |
5493aa17 | 2159 | |
5493aa17 | 2160 | |
8c6a85e3 | 2161 | /* Match a FORALL statement. */ |
5493aa17 | 2162 | |
8c6a85e3 TB |
2163 | match |
2164 | gfc_match_forall (gfc_statement *st) | |
2165 | { | |
2166 | gfc_forall_iterator *head; | |
2167 | gfc_expr *mask; | |
2168 | gfc_code *c; | |
2169 | match m0, m; | |
5493aa17 | 2170 | |
8c6a85e3 TB |
2171 | head = NULL; |
2172 | mask = NULL; | |
2173 | c = NULL; | |
5493aa17 | 2174 | |
8c6a85e3 TB |
2175 | m0 = gfc_match_label (); |
2176 | if (m0 == MATCH_ERROR) | |
2177 | return MATCH_ERROR; | |
2178 | ||
2179 | m = gfc_match (" forall"); | |
2180 | if (m != MATCH_YES) | |
2181 | return m; | |
2182 | ||
2183 | m = match_forall_header (&head, &mask); | |
5493aa17 | 2184 | if (m == MATCH_ERROR) |
8c6a85e3 | 2185 | goto cleanup; |
5493aa17 | 2186 | if (m == MATCH_NO) |
8c6a85e3 TB |
2187 | goto syntax; |
2188 | ||
2189 | if (gfc_match_eos () == MATCH_YES) | |
5493aa17 | 2190 | { |
8c6a85e3 TB |
2191 | *st = ST_FORALL_BLOCK; |
2192 | new_st.op = EXEC_FORALL; | |
2193 | new_st.expr1 = mask; | |
2194 | new_st.ext.forall_iterator = head; | |
2195 | return MATCH_YES; | |
5493aa17 TB |
2196 | } |
2197 | ||
8c6a85e3 TB |
2198 | m = gfc_match_assignment (); |
2199 | if (m == MATCH_ERROR) | |
2200 | goto cleanup; | |
2201 | if (m == MATCH_NO) | |
5493aa17 | 2202 | { |
8c6a85e3 | 2203 | m = gfc_match_pointer_assignment (); |
5493aa17 | 2204 | if (m == MATCH_ERROR) |
8c6a85e3 TB |
2205 | goto cleanup; |
2206 | if (m == MATCH_NO) | |
5493aa17 | 2207 | goto syntax; |
8c6a85e3 | 2208 | } |
5493aa17 | 2209 | |
11e5274a | 2210 | c = XCNEW (gfc_code); |
8c6a85e3 TB |
2211 | *c = new_st; |
2212 | c->loc = gfc_current_locus; | |
5493aa17 | 2213 | |
8c6a85e3 TB |
2214 | gfc_clear_new_st (); |
2215 | new_st.op = EXEC_FORALL; | |
2216 | new_st.expr1 = mask; | |
2217 | new_st.ext.forall_iterator = head; | |
11e5274a | 2218 | new_st.block = gfc_get_code (EXEC_FORALL); |
8c6a85e3 | 2219 | new_st.block->next = c; |
5493aa17 | 2220 | |
8c6a85e3 TB |
2221 | *st = ST_FORALL; |
2222 | return MATCH_YES; | |
5493aa17 | 2223 | |
8c6a85e3 TB |
2224 | syntax: |
2225 | gfc_syntax_error (ST_FORALL); | |
5493aa17 | 2226 | |
8c6a85e3 TB |
2227 | cleanup: |
2228 | gfc_free_forall_iterator (head); | |
2229 | gfc_free_expr (mask); | |
2230 | gfc_free_statements (c); | |
2231 | return MATCH_NO; | |
2232 | } | |
5493aa17 | 2233 | |
5493aa17 | 2234 | |
8c6a85e3 | 2235 | /* Match a DO statement. */ |
5493aa17 | 2236 | |
8c6a85e3 TB |
2237 | match |
2238 | gfc_match_do (void) | |
2239 | { | |
2240 | gfc_iterator iter, *ip; | |
2241 | locus old_loc; | |
2242 | gfc_st_label *label; | |
2243 | match m; | |
5493aa17 | 2244 | |
8c6a85e3 TB |
2245 | old_loc = gfc_current_locus; |
2246 | ||
2247 | label = NULL; | |
2248 | iter.var = iter.start = iter.end = iter.step = NULL; | |
5493aa17 | 2249 | |
8c6a85e3 | 2250 | m = gfc_match_label (); |
5493aa17 | 2251 | if (m == MATCH_ERROR) |
8c6a85e3 | 2252 | return m; |
5493aa17 | 2253 | |
8c6a85e3 TB |
2254 | if (gfc_match (" do") != MATCH_YES) |
2255 | return MATCH_NO; | |
5493aa17 | 2256 | |
8c6a85e3 TB |
2257 | m = gfc_match_st_label (&label); |
2258 | if (m == MATCH_ERROR) | |
2259 | goto cleanup; | |
2260 | ||
2261 | /* Match an infinite DO, make it like a DO WHILE(.TRUE.). */ | |
2262 | ||
2263 | if (gfc_match_eos () == MATCH_YES) | |
5493aa17 | 2264 | { |
8c6a85e3 TB |
2265 | iter.end = gfc_get_logical_expr (gfc_default_logical_kind, NULL, true); |
2266 | new_st.op = EXEC_DO_WHILE; | |
2267 | goto done; | |
5493aa17 TB |
2268 | } |
2269 | ||
8c6a85e3 TB |
2270 | /* Match an optional comma, if no comma is found, a space is obligatory. */ |
2271 | if (gfc_match_char (',') != MATCH_YES && gfc_match ("% ") != MATCH_YES) | |
2272 | return MATCH_NO; | |
5493aa17 | 2273 | |
8c6a85e3 | 2274 | /* Check for balanced parens. */ |
8b704316 | 2275 | |
8c6a85e3 TB |
2276 | if (gfc_match_parens () == MATCH_ERROR) |
2277 | return MATCH_ERROR; | |
5493aa17 | 2278 | |
8c6a85e3 TB |
2279 | if (gfc_match (" concurrent") == MATCH_YES) |
2280 | { | |
2281 | gfc_forall_iterator *head; | |
2282 | gfc_expr *mask; | |
5493aa17 | 2283 | |
524af0d6 | 2284 | if (!gfc_notify_std (GFC_STD_F2008, "DO CONCURRENT construct at %C")) |
8c6a85e3 | 2285 | return MATCH_ERROR; |
5493aa17 | 2286 | |
d0a4a61c | 2287 | |
8c6a85e3 TB |
2288 | mask = NULL; |
2289 | head = NULL; | |
2290 | m = match_forall_header (&head, &mask); | |
d0a4a61c | 2291 | |
8c6a85e3 TB |
2292 | if (m == MATCH_NO) |
2293 | return m; | |
2294 | if (m == MATCH_ERROR) | |
2295 | goto concurr_cleanup; | |
d0a4a61c | 2296 | |
8c6a85e3 TB |
2297 | if (gfc_match_eos () != MATCH_YES) |
2298 | goto concurr_cleanup; | |
d0a4a61c | 2299 | |
8c6a85e3 | 2300 | if (label != NULL |
524af0d6 | 2301 | && !gfc_reference_st_label (label, ST_LABEL_DO_TARGET)) |
8c6a85e3 | 2302 | goto concurr_cleanup; |
f1f39033 | 2303 | |
8c6a85e3 TB |
2304 | new_st.label1 = label; |
2305 | new_st.op = EXEC_DO_CONCURRENT; | |
2306 | new_st.expr1 = mask; | |
2307 | new_st.ext.forall_iterator = head; | |
d0a4a61c | 2308 | |
8c6a85e3 | 2309 | return MATCH_YES; |
f4d1d50a | 2310 | |
8c6a85e3 TB |
2311 | concurr_cleanup: |
2312 | gfc_syntax_error (ST_DO); | |
2313 | gfc_free_expr (mask); | |
2314 | gfc_free_forall_iterator (head); | |
d0a4a61c TB |
2315 | return MATCH_ERROR; |
2316 | } | |
5493aa17 | 2317 | |
8c6a85e3 TB |
2318 | /* See if we have a DO WHILE. */ |
2319 | if (gfc_match (" while ( %e )%t", &iter.end) == MATCH_YES) | |
d0a4a61c | 2320 | { |
8c6a85e3 | 2321 | new_st.op = EXEC_DO_WHILE; |
d0a4a61c TB |
2322 | goto done; |
2323 | } | |
2324 | ||
8c6a85e3 TB |
2325 | /* The abortive DO WHILE may have done something to the symbol |
2326 | table, so we start over. */ | |
2327 | gfc_undo_symbols (); | |
2328 | gfc_current_locus = old_loc; | |
5493aa17 | 2329 | |
8c6a85e3 TB |
2330 | gfc_match_label (); /* This won't error. */ |
2331 | gfc_match (" do "); /* This will work. */ | |
d0a4a61c | 2332 | |
8c6a85e3 TB |
2333 | gfc_match_st_label (&label); /* Can't error out. */ |
2334 | gfc_match_char (','); /* Optional comma. */ | |
d0a4a61c | 2335 | |
8c6a85e3 TB |
2336 | m = gfc_match_iterator (&iter, 0); |
2337 | if (m == MATCH_NO) | |
2338 | return MATCH_NO; | |
2339 | if (m == MATCH_ERROR) | |
2340 | goto cleanup; | |
d0a4a61c | 2341 | |
8c6a85e3 TB |
2342 | iter.var->symtree->n.sym->attr.implied_index = 0; |
2343 | gfc_check_do_variable (iter.var->symtree); | |
d0a4a61c | 2344 | |
8c6a85e3 TB |
2345 | if (gfc_match_eos () != MATCH_YES) |
2346 | { | |
2347 | gfc_syntax_error (ST_DO); | |
2348 | goto cleanup; | |
d0a4a61c TB |
2349 | } |
2350 | ||
8c6a85e3 | 2351 | new_st.op = EXEC_DO; |
d0a4a61c TB |
2352 | |
2353 | done: | |
8c6a85e3 | 2354 | if (label != NULL |
524af0d6 | 2355 | && !gfc_reference_st_label (label, ST_LABEL_DO_TARGET)) |
8c6a85e3 TB |
2356 | goto cleanup; |
2357 | ||
2358 | new_st.label1 = label; | |
2359 | ||
2360 | if (new_st.op == EXEC_DO_WHILE) | |
2361 | new_st.expr1 = iter.end; | |
2362 | else | |
d0a4a61c | 2363 | { |
8c6a85e3 TB |
2364 | new_st.ext.iterator = ip = gfc_get_iterator (); |
2365 | *ip = iter; | |
d0a4a61c TB |
2366 | } |
2367 | ||
d0a4a61c TB |
2368 | return MATCH_YES; |
2369 | ||
d0a4a61c | 2370 | cleanup: |
8c6a85e3 | 2371 | gfc_free_iterator (&iter, 0); |
d0a4a61c TB |
2372 | |
2373 | return MATCH_ERROR; | |
2374 | } | |
2375 | ||
2376 | ||
8c6a85e3 | 2377 | /* Match an EXIT or CYCLE statement. */ |
d0a4a61c | 2378 | |
8c6a85e3 TB |
2379 | static match |
2380 | match_exit_cycle (gfc_statement st, gfc_exec_op op) | |
d0a4a61c | 2381 | { |
8c6a85e3 TB |
2382 | gfc_state_data *p, *o; |
2383 | gfc_symbol *sym; | |
2384 | match m; | |
2385 | int cnt; | |
d0a4a61c | 2386 | |
8c6a85e3 TB |
2387 | if (gfc_match_eos () == MATCH_YES) |
2388 | sym = NULL; | |
2389 | else | |
2390 | { | |
2391 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2392 | gfc_symtree* stree; | |
d0a4a61c | 2393 | |
8c6a85e3 TB |
2394 | m = gfc_match ("% %n%t", name); |
2395 | if (m == MATCH_ERROR) | |
2396 | return MATCH_ERROR; | |
2397 | if (m == MATCH_NO) | |
2398 | { | |
2399 | gfc_syntax_error (st); | |
2400 | return MATCH_ERROR; | |
2401 | } | |
d0a4a61c | 2402 | |
8c6a85e3 TB |
2403 | /* Find the corresponding symbol. If there's a BLOCK statement |
2404 | between here and the label, it is not in gfc_current_ns but a parent | |
2405 | namespace! */ | |
2406 | stree = gfc_find_symtree_in_proc (name, gfc_current_ns); | |
2407 | if (!stree) | |
2408 | { | |
2409 | gfc_error ("Name '%s' in %s statement at %C is unknown", | |
2410 | name, gfc_ascii_statement (st)); | |
2411 | return MATCH_ERROR; | |
2412 | } | |
d0a4a61c | 2413 | |
8c6a85e3 TB |
2414 | sym = stree->n.sym; |
2415 | if (sym->attr.flavor != FL_LABEL) | |
2416 | { | |
2417 | gfc_error ("Name '%s' in %s statement at %C is not a construct name", | |
2418 | name, gfc_ascii_statement (st)); | |
2419 | return MATCH_ERROR; | |
2420 | } | |
2421 | } | |
d0a4a61c | 2422 | |
8c6a85e3 TB |
2423 | /* Find the loop specified by the label (or lack of a label). */ |
2424 | for (o = NULL, p = gfc_state_stack; p; p = p->previous) | |
2425 | if (o == NULL && p->state == COMP_OMP_STRUCTURED_BLOCK) | |
2426 | o = p; | |
2427 | else if (p->state == COMP_CRITICAL) | |
2428 | { | |
2429 | gfc_error("%s statement at %C leaves CRITICAL construct", | |
2430 | gfc_ascii_statement (st)); | |
2431 | return MATCH_ERROR; | |
2432 | } | |
2433 | else if (p->state == COMP_DO_CONCURRENT | |
2434 | && (op == EXEC_EXIT || (sym && sym != p->sym))) | |
2435 | { | |
2436 | /* F2008, C821 & C845. */ | |
2437 | gfc_error("%s statement at %C leaves DO CONCURRENT construct", | |
2438 | gfc_ascii_statement (st)); | |
2439 | return MATCH_ERROR; | |
2440 | } | |
2441 | else if ((sym && sym == p->sym) | |
2442 | || (!sym && (p->state == COMP_DO | |
2443 | || p->state == COMP_DO_CONCURRENT))) | |
2444 | break; | |
6de9cd9a | 2445 | |
8c6a85e3 | 2446 | if (p == NULL) |
6de9cd9a | 2447 | { |
8c6a85e3 TB |
2448 | if (sym == NULL) |
2449 | gfc_error ("%s statement at %C is not within a construct", | |
2450 | gfc_ascii_statement (st)); | |
2451 | else | |
2452 | gfc_error ("%s statement at %C is not within construct '%s'", | |
2453 | gfc_ascii_statement (st), sym->name); | |
2454 | ||
6de9cd9a DN |
2455 | return MATCH_ERROR; |
2456 | } | |
2457 | ||
8c6a85e3 TB |
2458 | /* Special checks for EXIT from non-loop constructs. */ |
2459 | switch (p->state) | |
2460 | { | |
2461 | case COMP_DO: | |
2462 | case COMP_DO_CONCURRENT: | |
2463 | break; | |
2464 | ||
2465 | case COMP_CRITICAL: | |
2466 | /* This is already handled above. */ | |
2467 | gcc_unreachable (); | |
2468 | ||
2469 | case COMP_ASSOCIATE: | |
2470 | case COMP_BLOCK: | |
2471 | case COMP_IF: | |
2472 | case COMP_SELECT: | |
2473 | case COMP_SELECT_TYPE: | |
2474 | gcc_assert (sym); | |
2475 | if (op == EXEC_CYCLE) | |
2476 | { | |
2477 | gfc_error ("CYCLE statement at %C is not applicable to non-loop" | |
2478 | " construct '%s'", sym->name); | |
2479 | return MATCH_ERROR; | |
2480 | } | |
2481 | gcc_assert (op == EXEC_EXIT); | |
524af0d6 JB |
2482 | if (!gfc_notify_std (GFC_STD_F2008, "EXIT statement with no" |
2483 | " do-construct-name at %C")) | |
8c6a85e3 TB |
2484 | return MATCH_ERROR; |
2485 | break; | |
8b704316 | 2486 | |
8c6a85e3 TB |
2487 | default: |
2488 | gfc_error ("%s statement at %C is not applicable to construct '%s'", | |
2489 | gfc_ascii_statement (st), sym->name); | |
2490 | return MATCH_ERROR; | |
2491 | } | |
2492 | ||
2493 | if (o != NULL) | |
2494 | { | |
2495 | gfc_error ("%s statement at %C leaving OpenMP structured block", | |
2496 | gfc_ascii_statement (st)); | |
2497 | return MATCH_ERROR; | |
2498 | } | |
2499 | ||
2500 | for (o = p, cnt = 0; o->state == COMP_DO && o->previous != NULL; cnt++) | |
2501 | o = o->previous; | |
2502 | if (cnt > 0 | |
2503 | && o != NULL | |
2504 | && o->state == COMP_OMP_STRUCTURED_BLOCK | |
2505 | && (o->head->op == EXEC_OMP_DO | |
dd2fc525 JJ |
2506 | || o->head->op == EXEC_OMP_PARALLEL_DO |
2507 | || o->head->op == EXEC_OMP_SIMD | |
2508 | || o->head->op == EXEC_OMP_DO_SIMD | |
2509 | || o->head->op == EXEC_OMP_PARALLEL_DO_SIMD)) | |
8c6a85e3 TB |
2510 | { |
2511 | int collapse = 1; | |
2512 | gcc_assert (o->head->next != NULL | |
2513 | && (o->head->next->op == EXEC_DO | |
2514 | || o->head->next->op == EXEC_DO_WHILE) | |
2515 | && o->previous != NULL | |
2516 | && o->previous->tail->op == o->head->op); | |
2517 | if (o->previous->tail->ext.omp_clauses != NULL | |
2518 | && o->previous->tail->ext.omp_clauses->collapse > 1) | |
2519 | collapse = o->previous->tail->ext.omp_clauses->collapse; | |
2520 | if (st == ST_EXIT && cnt <= collapse) | |
2521 | { | |
2522 | gfc_error ("EXIT statement at %C terminating !$OMP DO loop"); | |
2523 | return MATCH_ERROR; | |
2524 | } | |
2525 | if (st == ST_CYCLE && cnt < collapse) | |
2526 | { | |
2527 | gfc_error ("CYCLE statement at %C to non-innermost collapsed" | |
2528 | " !$OMP DO loop"); | |
2529 | return MATCH_ERROR; | |
2530 | } | |
2531 | } | |
2532 | ||
2533 | /* Save the first statement in the construct - needed by the backend. */ | |
2534 | new_st.ext.which_construct = p->construct; | |
2535 | ||
2536 | new_st.op = op; | |
2537 | ||
6de9cd9a DN |
2538 | return MATCH_YES; |
2539 | } | |
2540 | ||
2541 | ||
8c6a85e3 | 2542 | /* Match the EXIT statement. */ |
6de9cd9a DN |
2543 | |
2544 | match | |
8c6a85e3 | 2545 | gfc_match_exit (void) |
6de9cd9a | 2546 | { |
8c6a85e3 TB |
2547 | return match_exit_cycle (ST_EXIT, EXEC_EXIT); |
2548 | } | |
6de9cd9a | 2549 | |
6de9cd9a | 2550 | |
8c6a85e3 | 2551 | /* Match the CYCLE statement. */ |
6de9cd9a | 2552 | |
8c6a85e3 TB |
2553 | match |
2554 | gfc_match_cycle (void) | |
2555 | { | |
2556 | return match_exit_cycle (ST_CYCLE, EXEC_CYCLE); | |
6de9cd9a DN |
2557 | } |
2558 | ||
2559 | ||
8c6a85e3 | 2560 | /* Match a number or character constant after an (ALL) STOP or PAUSE statement. */ |
6de9cd9a | 2561 | |
8c6a85e3 TB |
2562 | static match |
2563 | gfc_match_stopcode (gfc_statement st) | |
6de9cd9a | 2564 | { |
8c6a85e3 | 2565 | gfc_expr *e; |
6de9cd9a DN |
2566 | match m; |
2567 | ||
8c6a85e3 TB |
2568 | e = NULL; |
2569 | ||
2570 | if (gfc_match_eos () != MATCH_YES) | |
6de9cd9a | 2571 | { |
8c6a85e3 TB |
2572 | m = gfc_match_init_expr (&e); |
2573 | if (m == MATCH_ERROR) | |
2574 | goto cleanup; | |
2575 | if (m == MATCH_NO) | |
2576 | goto syntax; | |
6de9cd9a | 2577 | |
8c6a85e3 TB |
2578 | if (gfc_match_eos () != MATCH_YES) |
2579 | goto syntax; | |
6de9cd9a DN |
2580 | } |
2581 | ||
8c6a85e3 | 2582 | if (gfc_pure (NULL)) |
6de9cd9a | 2583 | { |
8c6a85e3 TB |
2584 | gfc_error ("%s statement not allowed in PURE procedure at %C", |
2585 | gfc_ascii_statement (st)); | |
2586 | goto cleanup; | |
2587 | } | |
6de9cd9a | 2588 | |
ccd7751b | 2589 | gfc_unset_implicit_pure (NULL); |
6de9cd9a | 2590 | |
524af0d6 | 2591 | if (st == ST_STOP && gfc_find_state (COMP_CRITICAL)) |
8c6a85e3 TB |
2592 | { |
2593 | gfc_error ("Image control statement STOP at %C in CRITICAL block"); | |
2594 | goto cleanup; | |
2595 | } | |
524af0d6 | 2596 | if (st == ST_STOP && gfc_find_state (COMP_DO_CONCURRENT)) |
8c6a85e3 TB |
2597 | { |
2598 | gfc_error ("Image control statement STOP at %C in DO CONCURRENT block"); | |
2599 | goto cleanup; | |
2600 | } | |
6de9cd9a | 2601 | |
8c6a85e3 TB |
2602 | if (e != NULL) |
2603 | { | |
2604 | if (!(e->ts.type == BT_CHARACTER || e->ts.type == BT_INTEGER)) | |
6de9cd9a | 2605 | { |
8c6a85e3 TB |
2606 | gfc_error ("STOP code at %L must be either INTEGER or CHARACTER type", |
2607 | &e->where); | |
2608 | goto cleanup; | |
6de9cd9a | 2609 | } |
6de9cd9a | 2610 | |
8c6a85e3 | 2611 | if (e->rank != 0) |
6de9cd9a | 2612 | { |
8c6a85e3 TB |
2613 | gfc_error ("STOP code at %L must be scalar", |
2614 | &e->where); | |
2615 | goto cleanup; | |
6de9cd9a | 2616 | } |
6de9cd9a | 2617 | |
8c6a85e3 TB |
2618 | if (e->ts.type == BT_CHARACTER |
2619 | && e->ts.kind != gfc_default_character_kind) | |
6de9cd9a | 2620 | { |
8c6a85e3 TB |
2621 | gfc_error ("STOP code at %L must be default character KIND=%d", |
2622 | &e->where, (int) gfc_default_character_kind); | |
2623 | goto cleanup; | |
6de9cd9a | 2624 | } |
6de9cd9a | 2625 | |
8c6a85e3 TB |
2626 | if (e->ts.type == BT_INTEGER |
2627 | && e->ts.kind != gfc_default_integer_kind) | |
2628 | { | |
2629 | gfc_error ("STOP code at %L must be default integer KIND=%d", | |
2630 | &e->where, (int) gfc_default_integer_kind); | |
2631 | goto cleanup; | |
2632 | } | |
6de9cd9a DN |
2633 | } |
2634 | ||
8c6a85e3 | 2635 | switch (st) |
6de9cd9a | 2636 | { |
8c6a85e3 TB |
2637 | case ST_STOP: |
2638 | new_st.op = EXEC_STOP; | |
2639 | break; | |
2640 | case ST_ERROR_STOP: | |
2641 | new_st.op = EXEC_ERROR_STOP; | |
2642 | break; | |
2643 | case ST_PAUSE: | |
2644 | new_st.op = EXEC_PAUSE; | |
2645 | break; | |
2646 | default: | |
2647 | gcc_unreachable (); | |
6de9cd9a DN |
2648 | } |
2649 | ||
8c6a85e3 TB |
2650 | new_st.expr1 = e; |
2651 | new_st.ext.stop_code = -1; | |
6de9cd9a | 2652 | |
6de9cd9a DN |
2653 | return MATCH_YES; |
2654 | ||
2655 | syntax: | |
8c6a85e3 TB |
2656 | gfc_syntax_error (st); |
2657 | ||
6de9cd9a | 2658 | cleanup: |
8c6a85e3 TB |
2659 | |
2660 | gfc_free_expr (e); | |
6de9cd9a DN |
2661 | return MATCH_ERROR; |
2662 | } | |
2663 | ||
2664 | ||
8c6a85e3 | 2665 | /* Match the (deprecated) PAUSE statement. */ |
6de9cd9a | 2666 | |
8c6a85e3 TB |
2667 | match |
2668 | gfc_match_pause (void) | |
6de9cd9a | 2669 | { |
8c6a85e3 | 2670 | match m; |
6de9cd9a | 2671 | |
8c6a85e3 TB |
2672 | m = gfc_match_stopcode (ST_PAUSE); |
2673 | if (m == MATCH_YES) | |
6de9cd9a | 2674 | { |
524af0d6 | 2675 | if (!gfc_notify_std (GFC_STD_F95_DEL, "PAUSE statement at %C")) |
8c6a85e3 | 2676 | m = MATCH_ERROR; |
6de9cd9a | 2677 | } |
8c6a85e3 | 2678 | return m; |
6de9cd9a DN |
2679 | } |
2680 | ||
2681 | ||
8c6a85e3 | 2682 | /* Match the STOP statement. */ |
cf2b3c22 | 2683 | |
8c6a85e3 TB |
2684 | match |
2685 | gfc_match_stop (void) | |
cf2b3c22 | 2686 | { |
8c6a85e3 TB |
2687 | return gfc_match_stopcode (ST_STOP); |
2688 | } | |
cf2b3c22 | 2689 | |
1fccc6c3 | 2690 | |
8c6a85e3 | 2691 | /* Match the ERROR STOP statement. */ |
1fccc6c3 | 2692 | |
8c6a85e3 TB |
2693 | match |
2694 | gfc_match_error_stop (void) | |
2695 | { | |
524af0d6 | 2696 | if (!gfc_notify_std (GFC_STD_F2008, "ERROR STOP statement at %C")) |
8c6a85e3 | 2697 | return MATCH_ERROR; |
cf2b3c22 | 2698 | |
8c6a85e3 | 2699 | return gfc_match_stopcode (ST_ERROR_STOP); |
cf2b3c22 TB |
2700 | } |
2701 | ||
2702 | ||
8c6a85e3 TB |
2703 | /* Match LOCK/UNLOCK statement. Syntax: |
2704 | LOCK ( lock-variable [ , lock-stat-list ] ) | |
2705 | UNLOCK ( lock-variable [ , sync-stat-list ] ) | |
2706 | where lock-stat is ACQUIRED_LOCK or sync-stat | |
2707 | and sync-stat is STAT= or ERRMSG=. */ | |
8234e5e0 SK |
2708 | |
2709 | static match | |
8c6a85e3 | 2710 | lock_unlock_statement (gfc_statement st) |
8234e5e0 SK |
2711 | { |
2712 | match m; | |
8c6a85e3 TB |
2713 | gfc_expr *tmp, *lockvar, *acq_lock, *stat, *errmsg; |
2714 | bool saw_acq_lock, saw_stat, saw_errmsg; | |
8234e5e0 | 2715 | |
8c6a85e3 TB |
2716 | tmp = lockvar = acq_lock = stat = errmsg = NULL; |
2717 | saw_acq_lock = saw_stat = saw_errmsg = false; | |
8234e5e0 | 2718 | |
8c6a85e3 | 2719 | if (gfc_pure (NULL)) |
1107bd38 | 2720 | { |
8c6a85e3 TB |
2721 | gfc_error ("Image control statement %s at %C in PURE procedure", |
2722 | st == ST_LOCK ? "LOCK" : "UNLOCK"); | |
2723 | return MATCH_ERROR; | |
1107bd38 | 2724 | } |
1107bd38 | 2725 | |
ccd7751b | 2726 | gfc_unset_implicit_pure (NULL); |
8c6a85e3 TB |
2727 | |
2728 | if (gfc_option.coarray == GFC_FCOARRAY_NONE) | |
8234e5e0 | 2729 | { |
ddc05d11 | 2730 | gfc_fatal_error ("Coarrays disabled at %C, use %<-fcoarray=%> to enable"); |
8c6a85e3 | 2731 | return MATCH_ERROR; |
8234e5e0 SK |
2732 | } |
2733 | ||
524af0d6 | 2734 | if (gfc_find_state (COMP_CRITICAL)) |
8234e5e0 | 2735 | { |
8c6a85e3 TB |
2736 | gfc_error ("Image control statement %s at %C in CRITICAL block", |
2737 | st == ST_LOCK ? "LOCK" : "UNLOCK"); | |
2738 | return MATCH_ERROR; | |
8234e5e0 SK |
2739 | } |
2740 | ||
524af0d6 | 2741 | if (gfc_find_state (COMP_DO_CONCURRENT)) |
8234e5e0 | 2742 | { |
8c6a85e3 TB |
2743 | gfc_error ("Image control statement %s at %C in DO CONCURRENT block", |
2744 | st == ST_LOCK ? "LOCK" : "UNLOCK"); | |
2745 | return MATCH_ERROR; | |
8234e5e0 SK |
2746 | } |
2747 | ||
8c6a85e3 TB |
2748 | if (gfc_match_char ('(') != MATCH_YES) |
2749 | goto syntax; | |
2750 | ||
2751 | if (gfc_match ("%e", &lockvar) != MATCH_YES) | |
2752 | goto syntax; | |
2753 | m = gfc_match_char (','); | |
2754 | if (m == MATCH_ERROR) | |
2755 | goto syntax; | |
2756 | if (m == MATCH_NO) | |
8234e5e0 | 2757 | { |
8c6a85e3 TB |
2758 | m = gfc_match_char (')'); |
2759 | if (m == MATCH_YES) | |
2760 | goto done; | |
2761 | goto syntax; | |
8234e5e0 SK |
2762 | } |
2763 | ||
8c6a85e3 | 2764 | for (;;) |
8234e5e0 | 2765 | { |
8c6a85e3 TB |
2766 | m = gfc_match (" stat = %v", &tmp); |
2767 | if (m == MATCH_ERROR) | |
2768 | goto syntax; | |
2769 | if (m == MATCH_YES) | |
2770 | { | |
2771 | if (saw_stat) | |
2772 | { | |
2773 | gfc_error ("Redundant STAT tag found at %L ", &tmp->where); | |
2774 | goto cleanup; | |
2775 | } | |
2776 | stat = tmp; | |
2777 | saw_stat = true; | |
1fccc6c3 | 2778 | |
8c6a85e3 TB |
2779 | m = gfc_match_char (','); |
2780 | if (m == MATCH_YES) | |
2781 | continue; | |
1fccc6c3 | 2782 | |
8c6a85e3 TB |
2783 | tmp = NULL; |
2784 | break; | |
2785 | } | |
1fccc6c3 | 2786 | |
8c6a85e3 TB |
2787 | m = gfc_match (" errmsg = %v", &tmp); |
2788 | if (m == MATCH_ERROR) | |
2789 | goto syntax; | |
2790 | if (m == MATCH_YES) | |
2791 | { | |
2792 | if (saw_errmsg) | |
2793 | { | |
2794 | gfc_error ("Redundant ERRMSG tag found at %L ", &tmp->where); | |
2795 | goto cleanup; | |
2796 | } | |
2797 | errmsg = tmp; | |
2798 | saw_errmsg = true; | |
8234e5e0 | 2799 | |
8c6a85e3 TB |
2800 | m = gfc_match_char (','); |
2801 | if (m == MATCH_YES) | |
2802 | continue; | |
8234e5e0 | 2803 | |
8c6a85e3 TB |
2804 | tmp = NULL; |
2805 | break; | |
2806 | } | |
8234e5e0 | 2807 | |
8c6a85e3 TB |
2808 | m = gfc_match (" acquired_lock = %v", &tmp); |
2809 | if (m == MATCH_ERROR || st == ST_UNLOCK) | |
2810 | goto syntax; | |
2811 | if (m == MATCH_YES) | |
2812 | { | |
2813 | if (saw_acq_lock) | |
2814 | { | |
2815 | gfc_error ("Redundant ACQUIRED_LOCK tag found at %L ", | |
2816 | &tmp->where); | |
2817 | goto cleanup; | |
2818 | } | |
2819 | acq_lock = tmp; | |
2820 | saw_acq_lock = true; | |
8234e5e0 | 2821 | |
8c6a85e3 TB |
2822 | m = gfc_match_char (','); |
2823 | if (m == MATCH_YES) | |
2824 | continue; | |
2825 | ||
2826 | tmp = NULL; | |
2827 | break; | |
2828 | } | |
2829 | ||
2830 | break; | |
2831 | } | |
2832 | ||
2833 | if (m == MATCH_ERROR) | |
2834 | goto syntax; | |
2835 | ||
2836 | if (gfc_match (" )%t") != MATCH_YES) | |
2837 | goto syntax; | |
2838 | ||
2839 | done: | |
2840 | switch (st) | |
8234e5e0 | 2841 | { |
8c6a85e3 TB |
2842 | case ST_LOCK: |
2843 | new_st.op = EXEC_LOCK; | |
2844 | break; | |
2845 | case ST_UNLOCK: | |
2846 | new_st.op = EXEC_UNLOCK; | |
2847 | break; | |
2848 | default: | |
2849 | gcc_unreachable (); | |
8234e5e0 SK |
2850 | } |
2851 | ||
8c6a85e3 TB |
2852 | new_st.expr1 = lockvar; |
2853 | new_st.expr2 = stat; | |
2854 | new_st.expr3 = errmsg; | |
2855 | new_st.expr4 = acq_lock; | |
8234e5e0 | 2856 | |
8c6a85e3 | 2857 | return MATCH_YES; |
8234e5e0 | 2858 | |
8c6a85e3 TB |
2859 | syntax: |
2860 | gfc_syntax_error (st); | |
2861 | ||
2862 | cleanup: | |
fd2805e1 TB |
2863 | if (acq_lock != tmp) |
2864 | gfc_free_expr (acq_lock); | |
2865 | if (errmsg != tmp) | |
2866 | gfc_free_expr (errmsg); | |
2867 | if (stat != tmp) | |
2868 | gfc_free_expr (stat); | |
2869 | ||
8c6a85e3 TB |
2870 | gfc_free_expr (tmp); |
2871 | gfc_free_expr (lockvar); | |
8c6a85e3 TB |
2872 | |
2873 | return MATCH_ERROR; | |
8234e5e0 SK |
2874 | } |
2875 | ||
2876 | ||
8c6a85e3 TB |
2877 | match |
2878 | gfc_match_lock (void) | |
2879 | { | |
524af0d6 | 2880 | if (!gfc_notify_std (GFC_STD_F2008, "LOCK statement at %C")) |
8c6a85e3 TB |
2881 | return MATCH_ERROR; |
2882 | ||
2883 | return lock_unlock_statement (ST_LOCK); | |
2884 | } | |
2885 | ||
6de9cd9a DN |
2886 | |
2887 | match | |
8c6a85e3 | 2888 | gfc_match_unlock (void) |
6de9cd9a | 2889 | { |
524af0d6 | 2890 | if (!gfc_notify_std (GFC_STD_F2008, "UNLOCK statement at %C")) |
8c6a85e3 | 2891 | return MATCH_ERROR; |
6de9cd9a | 2892 | |
8c6a85e3 TB |
2893 | return lock_unlock_statement (ST_UNLOCK); |
2894 | } | |
6de9cd9a | 2895 | |
6de9cd9a | 2896 | |
8c6a85e3 TB |
2897 | /* Match SYNC ALL/IMAGES/MEMORY statement. Syntax: |
2898 | SYNC ALL [(sync-stat-list)] | |
2899 | SYNC MEMORY [(sync-stat-list)] | |
2900 | SYNC IMAGES (image-set [, sync-stat-list] ) | |
2901 | with sync-stat is int-expr or *. */ | |
1fccc6c3 | 2902 | |
8c6a85e3 TB |
2903 | static match |
2904 | sync_statement (gfc_statement st) | |
2905 | { | |
2906 | match m; | |
2907 | gfc_expr *tmp, *imageset, *stat, *errmsg; | |
2908 | bool saw_stat, saw_errmsg; | |
1fccc6c3 | 2909 | |
8c6a85e3 TB |
2910 | tmp = imageset = stat = errmsg = NULL; |
2911 | saw_stat = saw_errmsg = false; | |
2912 | ||
2913 | if (gfc_pure (NULL)) | |
2914 | { | |
2915 | gfc_error ("Image control statement SYNC at %C in PURE procedure"); | |
2916 | return MATCH_ERROR; | |
1fccc6c3 | 2917 | } |
8c6a85e3 | 2918 | |
ccd7751b | 2919 | gfc_unset_implicit_pure (NULL); |
8c6a85e3 | 2920 | |
524af0d6 | 2921 | if (!gfc_notify_std (GFC_STD_F2008, "SYNC statement at %C")) |
8c6a85e3 TB |
2922 | return MATCH_ERROR; |
2923 | ||
2924 | if (gfc_option.coarray == GFC_FCOARRAY_NONE) | |
8234e5e0 | 2925 | { |
ddc05d11 TB |
2926 | gfc_fatal_error ("Coarrays disabled at %C, use %<-fcoarray=%> to " |
2927 | "enable"); | |
8c6a85e3 TB |
2928 | return MATCH_ERROR; |
2929 | } | |
e69afb29 | 2930 | |
524af0d6 | 2931 | if (gfc_find_state (COMP_CRITICAL)) |
8c6a85e3 TB |
2932 | { |
2933 | gfc_error ("Image control statement SYNC at %C in CRITICAL block"); | |
2934 | return MATCH_ERROR; | |
8234e5e0 SK |
2935 | } |
2936 | ||
524af0d6 | 2937 | if (gfc_find_state (COMP_DO_CONCURRENT)) |
6de9cd9a | 2938 | { |
8c6a85e3 TB |
2939 | gfc_error ("Image control statement SYNC at %C in DO CONCURRENT block"); |
2940 | return MATCH_ERROR; | |
2941 | } | |
6de9cd9a | 2942 | |
8c6a85e3 TB |
2943 | if (gfc_match_eos () == MATCH_YES) |
2944 | { | |
2945 | if (st == ST_SYNC_IMAGES) | |
6de9cd9a | 2946 | goto syntax; |
8c6a85e3 TB |
2947 | goto done; |
2948 | } | |
6de9cd9a | 2949 | |
8c6a85e3 TB |
2950 | if (gfc_match_char ('(') != MATCH_YES) |
2951 | goto syntax; | |
c9583ed2 | 2952 | |
8c6a85e3 TB |
2953 | if (st == ST_SYNC_IMAGES) |
2954 | { | |
2955 | /* Denote '*' as imageset == NULL. */ | |
2956 | m = gfc_match_char ('*'); | |
2957 | if (m == MATCH_ERROR) | |
2958 | goto syntax; | |
2959 | if (m == MATCH_NO) | |
6de9cd9a | 2960 | { |
8c6a85e3 TB |
2961 | if (gfc_match ("%e", &imageset) != MATCH_YES) |
2962 | goto syntax; | |
6de9cd9a | 2963 | } |
8c6a85e3 TB |
2964 | m = gfc_match_char (','); |
2965 | if (m == MATCH_ERROR) | |
2966 | goto syntax; | |
2967 | if (m == MATCH_NO) | |
e69afb29 | 2968 | { |
8c6a85e3 TB |
2969 | m = gfc_match_char (')'); |
2970 | if (m == MATCH_YES) | |
2971 | goto done; | |
2972 | goto syntax; | |
e69afb29 | 2973 | } |
8c6a85e3 | 2974 | } |
e69afb29 | 2975 | |
8c6a85e3 TB |
2976 | for (;;) |
2977 | { | |
2978 | m = gfc_match (" stat = %v", &tmp); | |
2979 | if (m == MATCH_ERROR) | |
2980 | goto syntax; | |
2981 | if (m == MATCH_YES) | |
8234e5e0 | 2982 | { |
8c6a85e3 | 2983 | if (saw_stat) |
8234e5e0 | 2984 | { |
8c6a85e3 | 2985 | gfc_error ("Redundant STAT tag found at %L ", &tmp->where); |
8234e5e0 SK |
2986 | goto cleanup; |
2987 | } | |
8c6a85e3 TB |
2988 | stat = tmp; |
2989 | saw_stat = true; | |
8234e5e0 | 2990 | |
8c6a85e3 TB |
2991 | if (gfc_match_char (',') == MATCH_YES) |
2992 | continue; | |
2993 | ||
2994 | tmp = NULL; | |
2995 | break; | |
2996 | } | |
2997 | ||
2998 | m = gfc_match (" errmsg = %v", &tmp); | |
2999 | if (m == MATCH_ERROR) | |
3000 | goto syntax; | |
3001 | if (m == MATCH_YES) | |
3002 | { | |
3003 | if (saw_errmsg) | |
8234e5e0 | 3004 | { |
8c6a85e3 | 3005 | gfc_error ("Redundant ERRMSG tag found at %L ", &tmp->where); |
8234e5e0 SK |
3006 | goto cleanup; |
3007 | } | |
8c6a85e3 TB |
3008 | errmsg = tmp; |
3009 | saw_errmsg = true; | |
8234e5e0 | 3010 | |
8c6a85e3 TB |
3011 | if (gfc_match_char (',') == MATCH_YES) |
3012 | continue; | |
3e978d30 | 3013 | |
8c6a85e3 TB |
3014 | tmp = NULL; |
3015 | break; | |
d59b1dcb DF |
3016 | } |
3017 | ||
6de9cd9a | 3018 | break; |
8c6a85e3 | 3019 | } |
6de9cd9a | 3020 | |
8c6a85e3 TB |
3021 | if (gfc_match (" )%t") != MATCH_YES) |
3022 | goto syntax; | |
3759634f | 3023 | |
8c6a85e3 TB |
3024 | done: |
3025 | switch (st) | |
3026 | { | |
3027 | case ST_SYNC_ALL: | |
3028 | new_st.op = EXEC_SYNC_ALL; | |
3029 | break; | |
3030 | case ST_SYNC_IMAGES: | |
3031 | new_st.op = EXEC_SYNC_IMAGES; | |
3032 | break; | |
3033 | case ST_SYNC_MEMORY: | |
3034 | new_st.op = EXEC_SYNC_MEMORY; | |
3035 | break; | |
3036 | default: | |
3037 | gcc_unreachable (); | |
3038 | } | |
3759634f | 3039 | |
8c6a85e3 TB |
3040 | new_st.expr1 = imageset; |
3041 | new_st.expr2 = stat; | |
3042 | new_st.expr3 = errmsg; | |
3759634f | 3043 | |
8c6a85e3 | 3044 | return MATCH_YES; |
3759634f | 3045 | |
8c6a85e3 TB |
3046 | syntax: |
3047 | gfc_syntax_error (st); | |
8234e5e0 | 3048 | |
8c6a85e3 | 3049 | cleanup: |
fd2805e1 TB |
3050 | if (stat != tmp) |
3051 | gfc_free_expr (stat); | |
3052 | if (errmsg != tmp) | |
3053 | gfc_free_expr (errmsg); | |
3054 | ||
8c6a85e3 TB |
3055 | gfc_free_expr (tmp); |
3056 | gfc_free_expr (imageset); | |
8234e5e0 | 3057 | |
8c6a85e3 TB |
3058 | return MATCH_ERROR; |
3059 | } | |
8234e5e0 | 3060 | |
8234e5e0 | 3061 | |
8c6a85e3 | 3062 | /* Match SYNC ALL statement. */ |
8234e5e0 | 3063 | |
8c6a85e3 TB |
3064 | match |
3065 | gfc_match_sync_all (void) | |
3066 | { | |
3067 | return sync_statement (ST_SYNC_ALL); | |
3068 | } | |
8234e5e0 | 3069 | |
94bff632 | 3070 | |
8c6a85e3 | 3071 | /* Match SYNC IMAGES statement. */ |
94bff632 | 3072 | |
8c6a85e3 TB |
3073 | match |
3074 | gfc_match_sync_images (void) | |
3075 | { | |
3076 | return sync_statement (ST_SYNC_IMAGES); | |
3077 | } | |
94bff632 | 3078 | |
94bff632 | 3079 | |
8c6a85e3 | 3080 | /* Match SYNC MEMORY statement. */ |
3759634f | 3081 | |
8c6a85e3 TB |
3082 | match |
3083 | gfc_match_sync_memory (void) | |
3084 | { | |
3085 | return sync_statement (ST_SYNC_MEMORY); | |
3086 | } | |
6de9cd9a | 3087 | |
6de9cd9a | 3088 | |
8c6a85e3 | 3089 | /* Match a CONTINUE statement. */ |
e69afb29 | 3090 | |
8c6a85e3 TB |
3091 | match |
3092 | gfc_match_continue (void) | |
3093 | { | |
3094 | if (gfc_match_eos () != MATCH_YES) | |
e69afb29 | 3095 | { |
8c6a85e3 TB |
3096 | gfc_syntax_error (ST_CONTINUE); |
3097 | return MATCH_ERROR; | |
e69afb29 | 3098 | } |
6de9cd9a | 3099 | |
8c6a85e3 | 3100 | new_st.op = EXEC_CONTINUE; |
6de9cd9a | 3101 | return MATCH_YES; |
6de9cd9a DN |
3102 | } |
3103 | ||
3104 | ||
8c6a85e3 | 3105 | /* Match the (deprecated) ASSIGN statement. */ |
6de9cd9a DN |
3106 | |
3107 | match | |
8c6a85e3 | 3108 | gfc_match_assign (void) |
6de9cd9a | 3109 | { |
8c6a85e3 TB |
3110 | gfc_expr *expr; |
3111 | gfc_st_label *label; | |
6de9cd9a | 3112 | |
8c6a85e3 | 3113 | if (gfc_match (" %l", &label) == MATCH_YES) |
6de9cd9a | 3114 | { |
524af0d6 | 3115 | if (!gfc_reference_st_label (label, ST_LABEL_UNKNOWN)) |
8c6a85e3 TB |
3116 | return MATCH_ERROR; |
3117 | if (gfc_match (" to %v%t", &expr) == MATCH_YES) | |
5aacb11e | 3118 | { |
524af0d6 | 3119 | if (!gfc_notify_std (GFC_STD_F95_DEL, "ASSIGN statement at %C")) |
8c6a85e3 | 3120 | return MATCH_ERROR; |
5aacb11e | 3121 | |
8c6a85e3 | 3122 | expr->symtree->n.sym->attr.assign = 1; |
6de9cd9a | 3123 | |
8c6a85e3 TB |
3124 | new_st.op = EXEC_LABEL_ASSIGN; |
3125 | new_st.label1 = label; | |
3126 | new_st.expr1 = expr; | |
3127 | return MATCH_YES; | |
6de9cd9a | 3128 | } |
6de9cd9a | 3129 | } |
8c6a85e3 | 3130 | return MATCH_NO; |
6de9cd9a DN |
3131 | } |
3132 | ||
3133 | ||
8c6a85e3 TB |
3134 | /* Match the GO TO statement. As a computed GOTO statement is |
3135 | matched, it is transformed into an equivalent SELECT block. No | |
3136 | tree is necessary, and the resulting jumps-to-jumps are | |
3137 | specifically optimized away by the back end. */ | |
6de9cd9a DN |
3138 | |
3139 | match | |
8c6a85e3 | 3140 | gfc_match_goto (void) |
6de9cd9a | 3141 | { |
8c6a85e3 TB |
3142 | gfc_code *head, *tail; |
3143 | gfc_expr *expr; | |
3144 | gfc_case *cp; | |
3145 | gfc_st_label *label; | |
3146 | int i; | |
6de9cd9a | 3147 | match m; |
6de9cd9a | 3148 | |
8c6a85e3 | 3149 | if (gfc_match (" %l%t", &label) == MATCH_YES) |
6de9cd9a | 3150 | { |
524af0d6 | 3151 | if (!gfc_reference_st_label (label, ST_LABEL_TARGET)) |
8c6a85e3 | 3152 | return MATCH_ERROR; |
6de9cd9a | 3153 | |
8c6a85e3 TB |
3154 | new_st.op = EXEC_GOTO; |
3155 | new_st.label1 = label; | |
3156 | return MATCH_YES; | |
3157 | } | |
6de9cd9a | 3158 | |
8b704316 | 3159 | /* The assigned GO TO statement. */ |
c9583ed2 | 3160 | |
8c6a85e3 TB |
3161 | if (gfc_match_variable (&expr, 0) == MATCH_YES) |
3162 | { | |
524af0d6 | 3163 | if (!gfc_notify_std (GFC_STD_F95_DEL, "Assigned GOTO statement at %C")) |
8c6a85e3 | 3164 | return MATCH_ERROR; |
cf2b3c22 | 3165 | |
8c6a85e3 TB |
3166 | new_st.op = EXEC_GOTO; |
3167 | new_st.expr1 = expr; | |
3759634f | 3168 | |
8c6a85e3 TB |
3169 | if (gfc_match_eos () == MATCH_YES) |
3170 | return MATCH_YES; | |
f1f39033 | 3171 | |
8c6a85e3 TB |
3172 | /* Match label list. */ |
3173 | gfc_match_char (','); | |
3174 | if (gfc_match_char ('(') != MATCH_YES) | |
3759634f | 3175 | { |
8c6a85e3 TB |
3176 | gfc_syntax_error (ST_GOTO); |
3177 | return MATCH_ERROR; | |
6de9cd9a | 3178 | } |
8c6a85e3 | 3179 | head = tail = NULL; |
6de9cd9a | 3180 | |
8c6a85e3 TB |
3181 | do |
3182 | { | |
3183 | m = gfc_match_st_label (&label); | |
3184 | if (m != MATCH_YES) | |
3185 | goto syntax; | |
6de9cd9a | 3186 | |
524af0d6 | 3187 | if (!gfc_reference_st_label (label, ST_LABEL_TARGET)) |
8c6a85e3 | 3188 | goto cleanup; |
3759634f | 3189 | |
8c6a85e3 | 3190 | if (head == NULL) |
11e5274a | 3191 | head = tail = gfc_get_code (EXEC_GOTO); |
8c6a85e3 | 3192 | else |
3759634f | 3193 | { |
11e5274a | 3194 | tail->block = gfc_get_code (EXEC_GOTO); |
8c6a85e3 | 3195 | tail = tail->block; |
3759634f SK |
3196 | } |
3197 | ||
8c6a85e3 | 3198 | tail->label1 = label; |
8c6a85e3 TB |
3199 | } |
3200 | while (gfc_match_char (',') == MATCH_YES); | |
3759634f | 3201 | |
8c6a85e3 TB |
3202 | if (gfc_match (")%t") != MATCH_YES) |
3203 | goto syntax; | |
6de9cd9a | 3204 | |
8c6a85e3 TB |
3205 | if (head == NULL) |
3206 | { | |
3207 | gfc_error ("Statement label list in GOTO at %C cannot be empty"); | |
3208 | goto syntax; | |
3759634f | 3209 | } |
8c6a85e3 | 3210 | new_st.block = head; |
3759634f | 3211 | |
8c6a85e3 TB |
3212 | return MATCH_YES; |
3213 | } | |
3759634f | 3214 | |
8c6a85e3 TB |
3215 | /* Last chance is a computed GO TO statement. */ |
3216 | if (gfc_match_char ('(') != MATCH_YES) | |
3217 | { | |
3218 | gfc_syntax_error (ST_GOTO); | |
3219 | return MATCH_ERROR; | |
3220 | } | |
3759634f | 3221 | |
8c6a85e3 TB |
3222 | head = tail = NULL; |
3223 | i = 1; | |
3759634f | 3224 | |
8c6a85e3 TB |
3225 | do |
3226 | { | |
3227 | m = gfc_match_st_label (&label); | |
3228 | if (m != MATCH_YES) | |
3229 | goto syntax; | |
3230 | ||
524af0d6 | 3231 | if (!gfc_reference_st_label (label, ST_LABEL_TARGET)) |
8c6a85e3 TB |
3232 | goto cleanup; |
3233 | ||
3234 | if (head == NULL) | |
11e5274a | 3235 | head = tail = gfc_get_code (EXEC_SELECT); |
8c6a85e3 TB |
3236 | else |
3237 | { | |
11e5274a | 3238 | tail->block = gfc_get_code (EXEC_SELECT); |
8c6a85e3 | 3239 | tail = tail->block; |
3759634f SK |
3240 | } |
3241 | ||
8c6a85e3 TB |
3242 | cp = gfc_get_case (); |
3243 | cp->low = cp->high = gfc_get_int_expr (gfc_default_integer_kind, | |
3244 | NULL, i++); | |
3759634f | 3245 | |
8c6a85e3 TB |
3246 | tail->ext.block.case_list = cp; |
3247 | ||
11e5274a | 3248 | tail->next = gfc_get_code (EXEC_GOTO); |
8c6a85e3 | 3249 | tail->next->label1 = label; |
3759634f | 3250 | } |
8c6a85e3 | 3251 | while (gfc_match_char (',') == MATCH_YES); |
6de9cd9a | 3252 | |
8c6a85e3 | 3253 | if (gfc_match_char (')') != MATCH_YES) |
6de9cd9a DN |
3254 | goto syntax; |
3255 | ||
8c6a85e3 TB |
3256 | if (head == NULL) |
3257 | { | |
3258 | gfc_error ("Statement label list in GOTO at %C cannot be empty"); | |
3259 | goto syntax; | |
3260 | } | |
6de9cd9a | 3261 | |
8c6a85e3 TB |
3262 | /* Get the rest of the statement. */ |
3263 | gfc_match_char (','); | |
6de9cd9a | 3264 | |
8c6a85e3 TB |
3265 | if (gfc_match (" %e%t", &expr) != MATCH_YES) |
3266 | goto syntax; | |
6de9cd9a | 3267 | |
524af0d6 | 3268 | if (!gfc_notify_std (GFC_STD_F95_OBS, "Computed GOTO at %C")) |
e2ab8b09 JW |
3269 | return MATCH_ERROR; |
3270 | ||
8c6a85e3 TB |
3271 | /* At this point, a computed GOTO has been fully matched and an |
3272 | equivalent SELECT statement constructed. */ | |
7f42f27f | 3273 | |
8c6a85e3 TB |
3274 | new_st.op = EXEC_SELECT; |
3275 | new_st.expr1 = NULL; | |
6de9cd9a | 3276 | |
8c6a85e3 TB |
3277 | /* Hack: For a "real" SELECT, the expression is in expr. We put |
3278 | it in expr2 so we can distinguish then and produce the correct | |
3279 | diagnostics. */ | |
3280 | new_st.expr2 = expr; | |
3281 | new_st.block = head; | |
3282 | return MATCH_YES; | |
6de9cd9a | 3283 | |
8c6a85e3 TB |
3284 | syntax: |
3285 | gfc_syntax_error (ST_GOTO); | |
6de9cd9a | 3286 | cleanup: |
8c6a85e3 | 3287 | gfc_free_statements (head); |
6de9cd9a | 3288 | return MATCH_ERROR; |
6de9cd9a DN |
3289 | } |
3290 | ||
3291 | ||
8c6a85e3 | 3292 | /* Frees a list of gfc_alloc structures. */ |
8e1f752a | 3293 | |
8c6a85e3 TB |
3294 | void |
3295 | gfc_free_alloc_list (gfc_alloc *p) | |
8e1f752a | 3296 | { |
8c6a85e3 | 3297 | gfc_alloc *q; |
8e1f752a | 3298 | |
8c6a85e3 | 3299 | for (; p; p = q) |
8e1f752a | 3300 | { |
8c6a85e3 TB |
3301 | q = p->next; |
3302 | gfc_free_expr (p->expr); | |
3303 | free (p); | |
8e1f752a | 3304 | } |
8e1f752a DK |
3305 | } |
3306 | ||
3307 | ||
8c6a85e3 | 3308 | /* Match an ALLOCATE statement. */ |
6de9cd9a DN |
3309 | |
3310 | match | |
8c6a85e3 | 3311 | gfc_match_allocate (void) |
6de9cd9a | 3312 | { |
8c6a85e3 TB |
3313 | gfc_alloc *head, *tail; |
3314 | gfc_expr *stat, *errmsg, *tmp, *source, *mold; | |
3315 | gfc_typespec ts; | |
6de9cd9a | 3316 | gfc_symbol *sym; |
6de9cd9a | 3317 | match m; |
8c6a85e3 TB |
3318 | locus old_locus, deferred_locus; |
3319 | bool saw_stat, saw_errmsg, saw_source, saw_mold, saw_deferred, b1, b2, b3; | |
8b704316 | 3320 | bool saw_unlimited = false; |
6de9cd9a | 3321 | |
8c6a85e3 TB |
3322 | head = tail = NULL; |
3323 | stat = errmsg = source = mold = tmp = NULL; | |
3324 | saw_stat = saw_errmsg = saw_source = saw_mold = saw_deferred = false; | |
6de9cd9a | 3325 | |
8c6a85e3 | 3326 | if (gfc_match_char ('(') != MATCH_YES) |
6de9cd9a | 3327 | goto syntax; |
6de9cd9a | 3328 | |
8c6a85e3 TB |
3329 | /* Match an optional type-spec. */ |
3330 | old_locus = gfc_current_locus; | |
894460a7 | 3331 | m = gfc_match_type_spec (&ts); |
8c6a85e3 TB |
3332 | if (m == MATCH_ERROR) |
3333 | goto cleanup; | |
3334 | else if (m == MATCH_NO) | |
3335 | { | |
3336 | char name[GFC_MAX_SYMBOL_LEN + 3]; | |
6de9cd9a | 3337 | |
8c6a85e3 TB |
3338 | if (gfc_match ("%n :: ", name) == MATCH_YES) |
3339 | { | |
3340 | gfc_error ("Error in type-spec at %L", &old_locus); | |
3341 | goto cleanup; | |
3342 | } | |
8e1f752a | 3343 | |
8c6a85e3 TB |
3344 | ts.type = BT_UNKNOWN; |
3345 | } | |
3346 | else | |
6291f3ba | 3347 | { |
8c6a85e3 | 3348 | if (gfc_match (" :: ") == MATCH_YES) |
eda0ed25 | 3349 | { |
524af0d6 JB |
3350 | if (!gfc_notify_std (GFC_STD_F2003, "typespec in ALLOCATE at %L", |
3351 | &old_locus)) | |
8c6a85e3 | 3352 | goto cleanup; |
6de9cd9a | 3353 | |
8c6a85e3 TB |
3354 | if (ts.deferred) |
3355 | { | |
3356 | gfc_error ("Type-spec at %L cannot contain a deferred " | |
3357 | "type parameter", &old_locus); | |
3358 | goto cleanup; | |
3359 | } | |
239b48db TB |
3360 | |
3361 | if (ts.type == BT_CHARACTER) | |
3362 | ts.u.cl->length_from_typespec = true; | |
8c6a85e3 TB |
3363 | } |
3364 | else | |
3365 | { | |
3366 | ts.type = BT_UNKNOWN; | |
3367 | gfc_current_locus = old_locus; | |
eda0ed25 | 3368 | } |
6291f3ba | 3369 | } |
8de10a62 | 3370 | |
8c6a85e3 | 3371 | for (;;) |
6de9cd9a | 3372 | { |
8c6a85e3 TB |
3373 | if (head == NULL) |
3374 | head = tail = gfc_get_alloc (); | |
3375 | else | |
3376 | { | |
3377 | tail->next = gfc_get_alloc (); | |
3378 | tail = tail->next; | |
3379 | } | |
3380 | ||
3381 | m = gfc_match_variable (&tail->expr, 0); | |
6de9cd9a DN |
3382 | if (m == MATCH_NO) |
3383 | goto syntax; | |
3384 | if (m == MATCH_ERROR) | |
3385 | goto cleanup; | |
3386 | ||
8c6a85e3 TB |
3387 | if (gfc_check_do_variable (tail->expr->symtree)) |
3388 | goto cleanup; | |
6de9cd9a | 3389 | |
ccd7751b TB |
3390 | bool impure = gfc_impure_variable (tail->expr->symtree->n.sym); |
3391 | if (impure && gfc_pure (NULL)) | |
8c6a85e3 TB |
3392 | { |
3393 | gfc_error ("Bad allocate-object at %C for a PURE procedure"); | |
3394 | goto cleanup; | |
3395 | } | |
6de9cd9a | 3396 | |
ccd7751b TB |
3397 | if (impure) |
3398 | gfc_unset_implicit_pure (NULL); | |
6de9cd9a | 3399 | |
8c6a85e3 TB |
3400 | if (tail->expr->ts.deferred) |
3401 | { | |
3402 | saw_deferred = true; | |
3403 | deferred_locus = tail->expr->where; | |
3404 | } | |
6de9cd9a | 3405 | |
524af0d6 JB |
3406 | if (gfc_find_state (COMP_DO_CONCURRENT) |
3407 | || gfc_find_state (COMP_CRITICAL)) | |
8c6a85e3 TB |
3408 | { |
3409 | gfc_ref *ref; | |
3410 | bool coarray = tail->expr->symtree->n.sym->attr.codimension; | |
3411 | for (ref = tail->expr->ref; ref; ref = ref->next) | |
3412 | if (ref->type == REF_COMPONENT) | |
3413 | coarray = ref->u.c.component->attr.codimension; | |
6de9cd9a | 3414 | |
524af0d6 | 3415 | if (coarray && gfc_find_state (COMP_DO_CONCURRENT)) |
8c6a85e3 TB |
3416 | { |
3417 | gfc_error ("ALLOCATE of coarray at %C in DO CONCURRENT block"); | |
3418 | goto cleanup; | |
3419 | } | |
524af0d6 | 3420 | if (coarray && gfc_find_state (COMP_CRITICAL)) |
8c6a85e3 TB |
3421 | { |
3422 | gfc_error ("ALLOCATE of coarray at %C in CRITICAL block"); | |
3423 | goto cleanup; | |
3424 | } | |
3425 | } | |
6de9cd9a | 3426 | |
98cf47d1 JW |
3427 | /* Check for F08:C628. */ |
3428 | sym = tail->expr->symtree->n.sym; | |
3429 | b1 = !(tail->expr->ref | |
3430 | && (tail->expr->ref->type == REF_COMPONENT | |
3431 | || tail->expr->ref->type == REF_ARRAY)); | |
3432 | if (sym && sym->ts.type == BT_CLASS && sym->attr.class_ok) | |
3433 | b2 = !(CLASS_DATA (sym)->attr.allocatable | |
3434 | || CLASS_DATA (sym)->attr.class_pointer); | |
3435 | else | |
3436 | b2 = sym && !(sym->attr.allocatable || sym->attr.pointer | |
3437 | || sym->attr.proc_pointer); | |
3438 | b3 = sym && sym->ns && sym->ns->proc_name | |
3439 | && (sym->ns->proc_name->attr.allocatable | |
3440 | || sym->ns->proc_name->attr.pointer | |
3441 | || sym->ns->proc_name->attr.proc_pointer); | |
3442 | if (b1 && b2 && !b3) | |
3443 | { | |
3444 | gfc_error ("Allocate-object at %L is neither a data pointer " | |
3445 | "nor an allocatable variable", &tail->expr->where); | |
3446 | goto cleanup; | |
3447 | } | |
3448 | ||
8c6a85e3 TB |
3449 | /* The ALLOCATE statement had an optional typespec. Check the |
3450 | constraints. */ | |
3451 | if (ts.type != BT_UNKNOWN) | |
6de9cd9a | 3452 | { |
8c6a85e3 TB |
3453 | /* Enforce F03:C624. */ |
3454 | if (!gfc_type_compatible (&tail->expr->ts, &ts)) | |
3455 | { | |
3456 | gfc_error ("Type of entity at %L is type incompatible with " | |
3457 | "typespec", &tail->expr->where); | |
3458 | goto cleanup; | |
3459 | } | |
6de9cd9a | 3460 | |
8c6a85e3 | 3461 | /* Enforce F03:C627. */ |
8b704316 | 3462 | if (ts.kind != tail->expr->ts.kind && !UNLIMITED_POLY (tail->expr)) |
8c6a85e3 TB |
3463 | { |
3464 | gfc_error ("Kind type parameter for entity at %L differs from " | |
3465 | "the kind type parameter of the typespec", | |
3466 | &tail->expr->where); | |
3467 | goto cleanup; | |
3468 | } | |
3469 | } | |
6de9cd9a | 3470 | |
8c6a85e3 TB |
3471 | if (tail->expr->ts.type == BT_DERIVED) |
3472 | tail->expr->ts.u.derived = gfc_use_derived (tail->expr->ts.u.derived); | |
6de9cd9a | 3473 | |
8b704316 PT |
3474 | saw_unlimited = saw_unlimited | UNLIMITED_POLY (tail->expr); |
3475 | ||
8c6a85e3 TB |
3476 | if (gfc_peek_ascii_char () == '(' && !sym->attr.dimension) |
3477 | { | |
3478 | gfc_error ("Shape specification for allocatable scalar at %C"); | |
3479 | goto cleanup; | |
3480 | } | |
6de9cd9a | 3481 | |
8c6a85e3 TB |
3482 | if (gfc_match_char (',') != MATCH_YES) |
3483 | break; | |
3484 | ||
3485 | alloc_opt_list: | |
3486 | ||
3487 | m = gfc_match (" stat = %v", &tmp); | |
3488 | if (m == MATCH_ERROR) | |
3489 | goto cleanup; | |
3490 | if (m == MATCH_YES) | |
3491 | { | |
3492 | /* Enforce C630. */ | |
3493 | if (saw_stat) | |
3494 | { | |
3495 | gfc_error ("Redundant STAT tag found at %L ", &tmp->where); | |
3496 | goto cleanup; | |
3497 | } | |
3498 | ||
3499 | stat = tmp; | |
3500 | tmp = NULL; | |
3501 | saw_stat = true; | |
3502 | ||
3503 | if (gfc_check_do_variable (stat->symtree)) | |
3504 | goto cleanup; | |
3505 | ||
3506 | if (gfc_match_char (',') == MATCH_YES) | |
3507 | goto alloc_opt_list; | |
3508 | } | |
3509 | ||
3510 | m = gfc_match (" errmsg = %v", &tmp); | |
3511 | if (m == MATCH_ERROR) | |
3512 | goto cleanup; | |
3513 | if (m == MATCH_YES) | |
3514 | { | |
524af0d6 | 3515 | if (!gfc_notify_std (GFC_STD_F2003, "ERRMSG tag at %L", &tmp->where)) |
8c6a85e3 TB |
3516 | goto cleanup; |
3517 | ||
3518 | /* Enforce C630. */ | |
3519 | if (saw_errmsg) | |
3520 | { | |
3521 | gfc_error ("Redundant ERRMSG tag found at %L ", &tmp->where); | |
3522 | goto cleanup; | |
3523 | } | |
3524 | ||
3525 | errmsg = tmp; | |
3526 | tmp = NULL; | |
3527 | saw_errmsg = true; | |
3528 | ||
3529 | if (gfc_match_char (',') == MATCH_YES) | |
3530 | goto alloc_opt_list; | |
3531 | } | |
3532 | ||
3533 | m = gfc_match (" source = %e", &tmp); | |
3534 | if (m == MATCH_ERROR) | |
3535 | goto cleanup; | |
3536 | if (m == MATCH_YES) | |
3537 | { | |
524af0d6 | 3538 | if (!gfc_notify_std (GFC_STD_F2003, "SOURCE tag at %L", &tmp->where)) |
8c6a85e3 TB |
3539 | goto cleanup; |
3540 | ||
3541 | /* Enforce C630. */ | |
3542 | if (saw_source) | |
3543 | { | |
3544 | gfc_error ("Redundant SOURCE tag found at %L ", &tmp->where); | |
3545 | goto cleanup; | |
3546 | } | |
3547 | ||
3548 | /* The next 2 conditionals check C631. */ | |
3549 | if (ts.type != BT_UNKNOWN) | |
3550 | { | |
c4100eae | 3551 | gfc_error_1 ("SOURCE tag at %L conflicts with the typespec at %L", |
8c6a85e3 TB |
3552 | &tmp->where, &old_locus); |
3553 | goto cleanup; | |
3554 | } | |
3555 | ||
4cb2a867 | 3556 | if (head->next |
524af0d6 JB |
3557 | && !gfc_notify_std (GFC_STD_F2008, "SOURCE tag at %L" |
3558 | " with more than a single allocate object", | |
3559 | &tmp->where)) | |
4cb2a867 | 3560 | goto cleanup; |
8c6a85e3 TB |
3561 | |
3562 | source = tmp; | |
3563 | tmp = NULL; | |
3564 | saw_source = true; | |
3565 | ||
3566 | if (gfc_match_char (',') == MATCH_YES) | |
3567 | goto alloc_opt_list; | |
6de9cd9a | 3568 | } |
8c6a85e3 TB |
3569 | |
3570 | m = gfc_match (" mold = %e", &tmp); | |
3571 | if (m == MATCH_ERROR) | |
3572 | goto cleanup; | |
3573 | if (m == MATCH_YES) | |
3574 | { | |
524af0d6 | 3575 | if (!gfc_notify_std (GFC_STD_F2008, "MOLD tag at %L", &tmp->where)) |
8c6a85e3 TB |
3576 | goto cleanup; |
3577 | ||
3578 | /* Check F08:C636. */ | |
3579 | if (saw_mold) | |
3580 | { | |
3581 | gfc_error ("Redundant MOLD tag found at %L ", &tmp->where); | |
3582 | goto cleanup; | |
3583 | } | |
8b704316 | 3584 | |
8c6a85e3 TB |
3585 | /* Check F08:C637. */ |
3586 | if (ts.type != BT_UNKNOWN) | |
3587 | { | |
c4100eae | 3588 | gfc_error_1 ("MOLD tag at %L conflicts with the typespec at %L", |
8c6a85e3 TB |
3589 | &tmp->where, &old_locus); |
3590 | goto cleanup; | |
3591 | } | |
3592 | ||
3593 | mold = tmp; | |
3594 | tmp = NULL; | |
3595 | saw_mold = true; | |
3596 | mold->mold = 1; | |
3597 | ||
3598 | if (gfc_match_char (',') == MATCH_YES) | |
3599 | goto alloc_opt_list; | |
3600 | } | |
3601 | ||
3602 | gfc_gobble_whitespace (); | |
3603 | ||
3604 | if (gfc_peek_char () == ')') | |
3605 | break; | |
6de9cd9a DN |
3606 | } |
3607 | ||
8c6a85e3 TB |
3608 | if (gfc_match (" )%t") != MATCH_YES) |
3609 | goto syntax; | |
3610 | ||
3611 | /* Check F08:C637. */ | |
3612 | if (source && mold) | |
3613 | { | |
c4100eae | 3614 | gfc_error_1 ("MOLD tag at %L conflicts with SOURCE tag at %L", |
8c6a85e3 TB |
3615 | &mold->where, &source->where); |
3616 | goto cleanup; | |
3617 | } | |
3618 | ||
3619 | /* Check F03:C623, */ | |
3620 | if (saw_deferred && ts.type == BT_UNKNOWN && !source && !mold) | |
3621 | { | |
3622 | gfc_error ("Allocate-object at %L with a deferred type parameter " | |
3623 | "requires either a type-spec or SOURCE tag or a MOLD tag", | |
3624 | &deferred_locus); | |
3625 | goto cleanup; | |
3626 | } | |
8b704316 PT |
3627 | |
3628 | /* Check F03:C625, */ | |
3629 | if (saw_unlimited && ts.type == BT_UNKNOWN && !source && !mold) | |
3630 | { | |
3631 | for (tail = head; tail; tail = tail->next) | |
3632 | { | |
3633 | if (UNLIMITED_POLY (tail->expr)) | |
3634 | gfc_error ("Unlimited polymorphic allocate-object at %L " | |
3635 | "requires either a type-spec or SOURCE tag " | |
3636 | "or a MOLD tag", &tail->expr->where); | |
3637 | } | |
3638 | goto cleanup; | |
3639 | } | |
3640 | ||
8c6a85e3 TB |
3641 | new_st.op = EXEC_ALLOCATE; |
3642 | new_st.expr1 = stat; | |
3643 | new_st.expr2 = errmsg; | |
3644 | if (source) | |
3645 | new_st.expr3 = source; | |
3646 | else | |
3647 | new_st.expr3 = mold; | |
3648 | new_st.ext.alloc.list = head; | |
3649 | new_st.ext.alloc.ts = ts; | |
6de9cd9a DN |
3650 | |
3651 | return MATCH_YES; | |
3652 | ||
3653 | syntax: | |
8c6a85e3 | 3654 | gfc_syntax_error (ST_ALLOCATE); |
6de9cd9a DN |
3655 | |
3656 | cleanup: | |
8c6a85e3 TB |
3657 | gfc_free_expr (errmsg); |
3658 | gfc_free_expr (source); | |
3659 | gfc_free_expr (stat); | |
3660 | gfc_free_expr (mold); | |
3661 | if (tmp && tmp->expr_type) gfc_free_expr (tmp); | |
3662 | gfc_free_alloc_list (head); | |
6de9cd9a DN |
3663 | return MATCH_ERROR; |
3664 | } | |
3665 | ||
3666 | ||
8c6a85e3 TB |
3667 | /* Match a NULLIFY statement. A NULLIFY statement is transformed into |
3668 | a set of pointer assignments to intrinsic NULL(). */ | |
9056bd70 | 3669 | |
8c6a85e3 TB |
3670 | match |
3671 | gfc_match_nullify (void) | |
9056bd70 | 3672 | { |
8c6a85e3 TB |
3673 | gfc_code *tail; |
3674 | gfc_expr *e, *p; | |
3675 | match m; | |
9056bd70 | 3676 | |
8c6a85e3 | 3677 | tail = NULL; |
53814b8f | 3678 | |
8c6a85e3 TB |
3679 | if (gfc_match_char ('(') != MATCH_YES) |
3680 | goto syntax; | |
9056bd70 | 3681 | |
8c6a85e3 | 3682 | for (;;) |
9056bd70 | 3683 | { |
8c6a85e3 TB |
3684 | m = gfc_match_variable (&p, 0); |
3685 | if (m == MATCH_ERROR) | |
3686 | goto cleanup; | |
3687 | if (m == MATCH_NO) | |
3688 | goto syntax; | |
3689 | ||
3690 | if (gfc_check_do_variable (p->symtree)) | |
3691 | goto cleanup; | |
3692 | ||
3693 | /* F2008, C1242. */ | |
3694 | if (gfc_is_coindexed (p)) | |
3695 | { | |
0c133211 | 3696 | gfc_error ("Pointer object at %C shall not be coindexed"); |
8c6a85e3 TB |
3697 | goto cleanup; |
3698 | } | |
3699 | ||
3700 | /* build ' => NULL() '. */ | |
3701 | e = gfc_get_null_expr (&gfc_current_locus); | |
3702 | ||
3703 | /* Chain to list. */ | |
3704 | if (tail == NULL) | |
11e5274a JW |
3705 | { |
3706 | tail = &new_st; | |
3707 | tail->op = EXEC_POINTER_ASSIGN; | |
3708 | } | |
8c6a85e3 TB |
3709 | else |
3710 | { | |
11e5274a | 3711 | tail->next = gfc_get_code (EXEC_POINTER_ASSIGN); |
8c6a85e3 TB |
3712 | tail = tail->next; |
3713 | } | |
3714 | ||
8c6a85e3 TB |
3715 | tail->expr1 = p; |
3716 | tail->expr2 = e; | |
3717 | ||
3718 | if (gfc_match (" )%t") == MATCH_YES) | |
3719 | break; | |
3720 | if (gfc_match_char (',') != MATCH_YES) | |
3721 | goto syntax; | |
9056bd70 TS |
3722 | } |
3723 | ||
8c6a85e3 TB |
3724 | return MATCH_YES; |
3725 | ||
3726 | syntax: | |
3727 | gfc_syntax_error (ST_NULLIFY); | |
3728 | ||
3729 | cleanup: | |
3730 | gfc_free_statements (new_st.next); | |
3731 | new_st.next = NULL; | |
3732 | gfc_free_expr (new_st.expr1); | |
3733 | new_st.expr1 = NULL; | |
3734 | gfc_free_expr (new_st.expr2); | |
3735 | new_st.expr2 = NULL; | |
3736 | return MATCH_ERROR; | |
9056bd70 TS |
3737 | } |
3738 | ||
3739 | ||
8c6a85e3 | 3740 | /* Match a DEALLOCATE statement. */ |
6de9cd9a | 3741 | |
8c6a85e3 TB |
3742 | match |
3743 | gfc_match_deallocate (void) | |
6de9cd9a | 3744 | { |
8c6a85e3 TB |
3745 | gfc_alloc *head, *tail; |
3746 | gfc_expr *stat, *errmsg, *tmp; | |
3747 | gfc_symbol *sym; | |
6de9cd9a | 3748 | match m; |
8c6a85e3 | 3749 | bool saw_stat, saw_errmsg, b1, b2; |
6de9cd9a | 3750 | |
8c6a85e3 TB |
3751 | head = tail = NULL; |
3752 | stat = errmsg = tmp = NULL; | |
3753 | saw_stat = saw_errmsg = false; | |
6de9cd9a | 3754 | |
8c6a85e3 TB |
3755 | if (gfc_match_char ('(') != MATCH_YES) |
3756 | goto syntax; | |
3757 | ||
3758 | for (;;) | |
6de9cd9a | 3759 | { |
8c6a85e3 TB |
3760 | if (head == NULL) |
3761 | head = tail = gfc_get_alloc (); | |
3762 | else | |
3763 | { | |
3764 | tail->next = gfc_get_alloc (); | |
3765 | tail = tail->next; | |
3766 | } | |
3767 | ||
3768 | m = gfc_match_variable (&tail->expr, 0); | |
3769 | if (m == MATCH_ERROR) | |
3770 | goto cleanup; | |
3771 | if (m == MATCH_NO) | |
3772 | goto syntax; | |
3773 | ||
3774 | if (gfc_check_do_variable (tail->expr->symtree)) | |
3775 | goto cleanup; | |
3776 | ||
3777 | sym = tail->expr->symtree->n.sym; | |
3778 | ||
ccd7751b TB |
3779 | bool impure = gfc_impure_variable (sym); |
3780 | if (impure && gfc_pure (NULL)) | |
8c6a85e3 TB |
3781 | { |
3782 | gfc_error ("Illegal allocate-object at %C for a PURE procedure"); | |
3783 | goto cleanup; | |
3784 | } | |
3785 | ||
ccd7751b TB |
3786 | if (impure) |
3787 | gfc_unset_implicit_pure (NULL); | |
8c6a85e3 TB |
3788 | |
3789 | if (gfc_is_coarray (tail->expr) | |
524af0d6 | 3790 | && gfc_find_state (COMP_DO_CONCURRENT)) |
8c6a85e3 TB |
3791 | { |
3792 | gfc_error ("DEALLOCATE of coarray at %C in DO CONCURRENT block"); | |
3793 | goto cleanup; | |
3794 | } | |
3795 | ||
3796 | if (gfc_is_coarray (tail->expr) | |
524af0d6 | 3797 | && gfc_find_state (COMP_CRITICAL)) |
8c6a85e3 TB |
3798 | { |
3799 | gfc_error ("DEALLOCATE of coarray at %C in CRITICAL block"); | |
3800 | goto cleanup; | |
3801 | } | |
3802 | ||
3803 | /* FIXME: disable the checking on derived types. */ | |
3804 | b1 = !(tail->expr->ref | |
3805 | && (tail->expr->ref->type == REF_COMPONENT | |
3806 | || tail->expr->ref->type == REF_ARRAY)); | |
3807 | if (sym && sym->ts.type == BT_CLASS) | |
3808 | b2 = !(CLASS_DATA (sym)->attr.allocatable | |
3809 | || CLASS_DATA (sym)->attr.class_pointer); | |
3810 | else | |
3811 | b2 = sym && !(sym->attr.allocatable || sym->attr.pointer | |
3812 | || sym->attr.proc_pointer); | |
3813 | if (b1 && b2) | |
3814 | { | |
3815 | gfc_error ("Allocate-object at %C is not a nonprocedure pointer " | |
b59e9071 | 3816 | "nor an allocatable variable"); |
8c6a85e3 TB |
3817 | goto cleanup; |
3818 | } | |
3819 | ||
3820 | if (gfc_match_char (',') != MATCH_YES) | |
3821 | break; | |
3822 | ||
3823 | dealloc_opt_list: | |
3824 | ||
3825 | m = gfc_match (" stat = %v", &tmp); | |
3826 | if (m == MATCH_ERROR) | |
3827 | goto cleanup; | |
3828 | if (m == MATCH_YES) | |
3829 | { | |
3830 | if (saw_stat) | |
3831 | { | |
3832 | gfc_error ("Redundant STAT tag found at %L ", &tmp->where); | |
3833 | gfc_free_expr (tmp); | |
3834 | goto cleanup; | |
3835 | } | |
3836 | ||
3837 | stat = tmp; | |
3838 | saw_stat = true; | |
3839 | ||
3840 | if (gfc_check_do_variable (stat->symtree)) | |
3841 | goto cleanup; | |
3842 | ||
3843 | if (gfc_match_char (',') == MATCH_YES) | |
3844 | goto dealloc_opt_list; | |
3845 | } | |
3846 | ||
3847 | m = gfc_match (" errmsg = %v", &tmp); | |
3848 | if (m == MATCH_ERROR) | |
3849 | goto cleanup; | |
3850 | if (m == MATCH_YES) | |
3851 | { | |
524af0d6 | 3852 | if (!gfc_notify_std (GFC_STD_F2003, "ERRMSG at %L", &tmp->where)) |
8c6a85e3 TB |
3853 | goto cleanup; |
3854 | ||
3855 | if (saw_errmsg) | |
3856 | { | |
3857 | gfc_error ("Redundant ERRMSG tag found at %L ", &tmp->where); | |
3858 | gfc_free_expr (tmp); | |
3859 | goto cleanup; | |
3860 | } | |
3861 | ||
3862 | errmsg = tmp; | |
3863 | saw_errmsg = true; | |
3864 | ||
3865 | if (gfc_match_char (',') == MATCH_YES) | |
3866 | goto dealloc_opt_list; | |
3867 | } | |
3868 | ||
3869 | gfc_gobble_whitespace (); | |
3870 | ||
3871 | if (gfc_peek_char () == ')') | |
3872 | break; | |
6de9cd9a DN |
3873 | } |
3874 | ||
8c6a85e3 TB |
3875 | if (gfc_match (" )%t") != MATCH_YES) |
3876 | goto syntax; | |
3877 | ||
3878 | new_st.op = EXEC_DEALLOCATE; | |
3879 | new_st.expr1 = stat; | |
3880 | new_st.expr2 = errmsg; | |
3881 | new_st.ext.alloc.list = head; | |
3882 | ||
3883 | return MATCH_YES; | |
6de9cd9a | 3884 | |
8c6a85e3 TB |
3885 | syntax: |
3886 | gfc_syntax_error (ST_DEALLOCATE); | |
6de9cd9a | 3887 | |
8c6a85e3 TB |
3888 | cleanup: |
3889 | gfc_free_expr (errmsg); | |
3890 | gfc_free_expr (stat); | |
3891 | gfc_free_alloc_list (head); | |
6de9cd9a DN |
3892 | return MATCH_ERROR; |
3893 | } | |
3894 | ||
3895 | ||
8c6a85e3 | 3896 | /* Match a RETURN statement. */ |
6de9cd9a DN |
3897 | |
3898 | match | |
8c6a85e3 | 3899 | gfc_match_return (void) |
6de9cd9a | 3900 | { |
8c6a85e3 | 3901 | gfc_expr *e; |
6de9cd9a | 3902 | match m; |
8c6a85e3 | 3903 | gfc_compile_state s; |
6de9cd9a | 3904 | |
8c6a85e3 TB |
3905 | e = NULL; |
3906 | ||
524af0d6 | 3907 | if (gfc_find_state (COMP_CRITICAL)) |
6de9cd9a | 3908 | { |
8c6a85e3 TB |
3909 | gfc_error ("Image control statement RETURN at %C in CRITICAL block"); |
3910 | return MATCH_ERROR; | |
6de9cd9a DN |
3911 | } |
3912 | ||
524af0d6 | 3913 | if (gfc_find_state (COMP_DO_CONCURRENT)) |
6de9cd9a | 3914 | { |
8c6a85e3 TB |
3915 | gfc_error ("Image control statement RETURN at %C in DO CONCURRENT block"); |
3916 | return MATCH_ERROR; | |
3917 | } | |
f69ab0e0 | 3918 | |
8c6a85e3 TB |
3919 | if (gfc_match_eos () == MATCH_YES) |
3920 | goto done; | |
6de9cd9a | 3921 | |
524af0d6 | 3922 | if (!gfc_find_state (COMP_SUBROUTINE)) |
8c6a85e3 TB |
3923 | { |
3924 | gfc_error ("Alternate RETURN statement at %C is only allowed within " | |
3925 | "a SUBROUTINE"); | |
3926 | goto cleanup; | |
3927 | } | |
6de9cd9a | 3928 | |
8c6a85e3 TB |
3929 | if (gfc_current_form == FORM_FREE) |
3930 | { | |
3931 | /* The following are valid, so we can't require a blank after the | |
3932 | RETURN keyword: | |
3933 | return+1 | |
3934 | return(1) */ | |
3935 | char c = gfc_peek_ascii_char (); | |
3936 | if (ISALPHA (c) || ISDIGIT (c)) | |
3937 | return MATCH_NO; | |
3938 | } | |
6de9cd9a | 3939 | |
8c6a85e3 TB |
3940 | m = gfc_match (" %e%t", &e); |
3941 | if (m == MATCH_YES) | |
3942 | goto done; | |
3943 | if (m == MATCH_ERROR) | |
3944 | goto cleanup; | |
6de9cd9a | 3945 | |
8c6a85e3 | 3946 | gfc_syntax_error (ST_RETURN); |
6de9cd9a | 3947 | |
8c6a85e3 TB |
3948 | cleanup: |
3949 | gfc_free_expr (e); | |
3950 | return MATCH_ERROR; | |
6de9cd9a | 3951 | |
8c6a85e3 TB |
3952 | done: |
3953 | gfc_enclosing_unit (&s); | |
3954 | if (s == COMP_PROGRAM | |
524af0d6 JB |
3955 | && !gfc_notify_std (GFC_STD_GNU, "RETURN statement in " |
3956 | "main program at %C")) | |
8c6a85e3 | 3957 | return MATCH_ERROR; |
30aabb86 | 3958 | |
8c6a85e3 TB |
3959 | new_st.op = EXEC_RETURN; |
3960 | new_st.expr1 = e; | |
30aabb86 | 3961 | |
8c6a85e3 TB |
3962 | return MATCH_YES; |
3963 | } | |
30aabb86 | 3964 | |
30aabb86 | 3965 | |
8b704316 | 3966 | /* Match the call of a type-bound procedure, if CALL%var has already been |
8c6a85e3 | 3967 | matched and var found to be a derived-type variable. */ |
30aabb86 | 3968 | |
8c6a85e3 TB |
3969 | static match |
3970 | match_typebound_call (gfc_symtree* varst) | |
3971 | { | |
3972 | gfc_expr* base; | |
3973 | match m; | |
30aabb86 | 3974 | |
8c6a85e3 TB |
3975 | base = gfc_get_expr (); |
3976 | base->expr_type = EXPR_VARIABLE; | |
3977 | base->symtree = varst; | |
3978 | base->where = gfc_current_locus; | |
3979 | gfc_set_sym_referenced (varst->n.sym); | |
8b704316 | 3980 | |
8c6a85e3 TB |
3981 | m = gfc_match_varspec (base, 0, true, true); |
3982 | if (m == MATCH_NO) | |
3983 | gfc_error ("Expected component reference at %C"); | |
3984 | if (m != MATCH_YES) | |
36abe895 TB |
3985 | { |
3986 | gfc_free_expr (base); | |
3987 | return MATCH_ERROR; | |
3988 | } | |
6de9cd9a | 3989 | |
8c6a85e3 TB |
3990 | if (gfc_match_eos () != MATCH_YES) |
3991 | { | |
3992 | gfc_error ("Junk after CALL at %C"); | |
36abe895 | 3993 | gfc_free_expr (base); |
8c6a85e3 TB |
3994 | return MATCH_ERROR; |
3995 | } | |
30aabb86 | 3996 | |
8c6a85e3 TB |
3997 | if (base->expr_type == EXPR_COMPCALL) |
3998 | new_st.op = EXEC_COMPCALL; | |
3999 | else if (base->expr_type == EXPR_PPC) | |
4000 | new_st.op = EXEC_CALL_PPC; | |
4001 | else | |
4002 | { | |
4003 | gfc_error ("Expected type-bound procedure or procedure pointer component " | |
4004 | "at %C"); | |
36abe895 | 4005 | gfc_free_expr (base); |
8c6a85e3 | 4006 | return MATCH_ERROR; |
6de9cd9a | 4007 | } |
8c6a85e3 | 4008 | new_st.expr1 = base; |
6de9cd9a | 4009 | |
6de9cd9a | 4010 | return MATCH_YES; |
6de9cd9a DN |
4011 | } |
4012 | ||
4013 | ||
8c6a85e3 TB |
4014 | /* Match a CALL statement. The tricky part here are possible |
4015 | alternate return specifiers. We handle these by having all | |
4016 | "subroutines" actually return an integer via a register that gives | |
4017 | the return number. If the call specifies alternate returns, we | |
4018 | generate code for a SELECT statement whose case clauses contain | |
4019 | GOTOs to the various labels. */ | |
6de9cd9a DN |
4020 | |
4021 | match | |
8c6a85e3 | 4022 | gfc_match_call (void) |
6de9cd9a DN |
4023 | { |
4024 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
8c6a85e3 TB |
4025 | gfc_actual_arglist *a, *arglist; |
4026 | gfc_case *new_case; | |
6de9cd9a | 4027 | gfc_symbol *sym; |
8c6a85e3 TB |
4028 | gfc_symtree *st; |
4029 | gfc_code *c; | |
6de9cd9a | 4030 | match m; |
8c6a85e3 | 4031 | int i; |
6de9cd9a | 4032 | |
8c6a85e3 | 4033 | arglist = NULL; |
6de9cd9a | 4034 | |
8c6a85e3 TB |
4035 | m = gfc_match ("% %n", name); |
4036 | if (m == MATCH_NO) | |
4037 | goto syntax; | |
6de9cd9a | 4038 | if (m != MATCH_YES) |
8c6a85e3 | 4039 | return m; |
6de9cd9a | 4040 | |
8c6a85e3 | 4041 | if (gfc_get_ha_sym_tree (name, &st)) |
6de9cd9a DN |
4042 | return MATCH_ERROR; |
4043 | ||
8c6a85e3 | 4044 | sym = st->n.sym; |
6de9cd9a | 4045 | |
8c6a85e3 TB |
4046 | /* If this is a variable of derived-type, it probably starts a type-bound |
4047 | procedure call. */ | |
4048 | if ((sym->attr.flavor != FL_PROCEDURE | |
4049 | || gfc_is_function_return_value (sym, gfc_current_ns)) | |
4050 | && (sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS)) | |
4051 | return match_typebound_call (st); | |
6de9cd9a | 4052 | |
8c6a85e3 TB |
4053 | /* If it does not seem to be callable (include functions so that the |
4054 | right association is made. They are thrown out in resolution.) | |
4055 | ... */ | |
4056 | if (!sym->attr.generic | |
4057 | && !sym->attr.subroutine | |
4058 | && !sym->attr.function) | |
4059 | { | |
4060 | if (!(sym->attr.external && !sym->attr.referenced)) | |
4061 | { | |
4062 | /* ...create a symbol in this scope... */ | |
4063 | if (sym->ns != gfc_current_ns | |
4064 | && gfc_get_sym_tree (name, NULL, &st, false) == 1) | |
4065 | return MATCH_ERROR; | |
6de9cd9a | 4066 | |
8c6a85e3 TB |
4067 | if (sym != st->n.sym) |
4068 | sym = st->n.sym; | |
4069 | } | |
6de9cd9a | 4070 | |
8c6a85e3 | 4071 | /* ...and then to try to make the symbol into a subroutine. */ |
524af0d6 | 4072 | if (!gfc_add_subroutine (&sym->attr, sym->name, NULL)) |
8c6a85e3 TB |
4073 | return MATCH_ERROR; |
4074 | } | |
6de9cd9a | 4075 | |
8c6a85e3 | 4076 | gfc_set_sym_referenced (sym); |
6de9cd9a | 4077 | |
8c6a85e3 | 4078 | if (gfc_match_eos () != MATCH_YES) |
6de9cd9a | 4079 | { |
8c6a85e3 TB |
4080 | m = gfc_match_actual_arglist (1, &arglist); |
4081 | if (m == MATCH_NO) | |
4082 | goto syntax; | |
4083 | if (m == MATCH_ERROR) | |
4084 | goto cleanup; | |
4085 | ||
4086 | if (gfc_match_eos () != MATCH_YES) | |
4087 | goto syntax; | |
6de9cd9a | 4088 | } |
6de9cd9a | 4089 | |
8c6a85e3 TB |
4090 | /* If any alternate return labels were found, construct a SELECT |
4091 | statement that will jump to the right place. */ | |
6de9cd9a | 4092 | |
8c6a85e3 TB |
4093 | i = 0; |
4094 | for (a = arglist; a; a = a->next) | |
4095 | if (a->expr == NULL) | |
502af491 PCC |
4096 | { |
4097 | i = 1; | |
4098 | break; | |
4099 | } | |
6de9cd9a | 4100 | |
8c6a85e3 TB |
4101 | if (i) |
4102 | { | |
4103 | gfc_symtree *select_st; | |
4104 | gfc_symbol *select_sym; | |
4105 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6de9cd9a | 4106 | |
11e5274a | 4107 | new_st.next = c = gfc_get_code (EXEC_SELECT); |
8c6a85e3 TB |
4108 | sprintf (name, "_result_%s", sym->name); |
4109 | gfc_get_ha_sym_tree (name, &select_st); /* Can't fail. */ | |
6de9cd9a | 4110 | |
8c6a85e3 TB |
4111 | select_sym = select_st->n.sym; |
4112 | select_sym->ts.type = BT_INTEGER; | |
4113 | select_sym->ts.kind = gfc_default_integer_kind; | |
4114 | gfc_set_sym_referenced (select_sym); | |
4115 | c->expr1 = gfc_get_expr (); | |
4116 | c->expr1->expr_type = EXPR_VARIABLE; | |
4117 | c->expr1->symtree = select_st; | |
4118 | c->expr1->ts = select_sym->ts; | |
4119 | c->expr1->where = gfc_current_locus; | |
4120 | ||
4121 | i = 0; | |
4122 | for (a = arglist; a; a = a->next) | |
6de9cd9a | 4123 | { |
8c6a85e3 TB |
4124 | if (a->expr != NULL) |
4125 | continue; | |
6de9cd9a | 4126 | |
524af0d6 | 4127 | if (!gfc_reference_st_label (a->label, ST_LABEL_TARGET)) |
8c6a85e3 | 4128 | continue; |
e0e85e06 | 4129 | |
8c6a85e3 | 4130 | i++; |
6de9cd9a | 4131 | |
11e5274a | 4132 | c->block = gfc_get_code (EXEC_SELECT); |
8c6a85e3 | 4133 | c = c->block; |
6de9cd9a | 4134 | |
8c6a85e3 TB |
4135 | new_case = gfc_get_case (); |
4136 | new_case->high = gfc_get_int_expr (gfc_default_integer_kind, NULL, i); | |
4137 | new_case->low = new_case->high; | |
4138 | c->ext.block.case_list = new_case; | |
6de9cd9a | 4139 | |
11e5274a | 4140 | c->next = gfc_get_code (EXEC_GOTO); |
8c6a85e3 TB |
4141 | c->next->label1 = a->label; |
4142 | } | |
4143 | } | |
e0e85e06 | 4144 | |
8c6a85e3 TB |
4145 | new_st.op = EXEC_CALL; |
4146 | new_st.symtree = st; | |
4147 | new_st.ext.actual = arglist; | |
6de9cd9a | 4148 | |
8c6a85e3 | 4149 | return MATCH_YES; |
6de9cd9a | 4150 | |
8c6a85e3 TB |
4151 | syntax: |
4152 | gfc_syntax_error (ST_CALL); | |
6de9cd9a | 4153 | |
8c6a85e3 TB |
4154 | cleanup: |
4155 | gfc_free_actual_arglist (arglist); | |
4156 | return MATCH_ERROR; | |
4157 | } | |
6de9cd9a | 4158 | |
6de9cd9a | 4159 | |
8c6a85e3 TB |
4160 | /* Given a name, return a pointer to the common head structure, |
4161 | creating it if it does not exist. If FROM_MODULE is nonzero, we | |
8b704316 | 4162 | mangle the name so that it doesn't interfere with commons defined |
8c6a85e3 TB |
4163 | in the using namespace. |
4164 | TODO: Add to global symbol tree. */ | |
4165 | ||
4166 | gfc_common_head * | |
4167 | gfc_get_common (const char *name, int from_module) | |
4168 | { | |
4169 | gfc_symtree *st; | |
4170 | static int serial = 0; | |
4171 | char mangled_name[GFC_MAX_SYMBOL_LEN + 1]; | |
4172 | ||
4173 | if (from_module) | |
4174 | { | |
4175 | /* A use associated common block is only needed to correctly layout | |
4176 | the variables it contains. */ | |
4177 | snprintf (mangled_name, GFC_MAX_SYMBOL_LEN, "_%d_%s", serial++, name); | |
4178 | st = gfc_new_symtree (&gfc_current_ns->common_root, mangled_name); | |
6de9cd9a | 4179 | } |
8c6a85e3 TB |
4180 | else |
4181 | { | |
4182 | st = gfc_find_symtree (gfc_current_ns->common_root, name); | |
6de9cd9a | 4183 | |
8c6a85e3 TB |
4184 | if (st == NULL) |
4185 | st = gfc_new_symtree (&gfc_current_ns->common_root, name); | |
4186 | } | |
6de9cd9a | 4187 | |
8c6a85e3 TB |
4188 | if (st->n.common == NULL) |
4189 | { | |
4190 | st->n.common = gfc_get_common_head (); | |
4191 | st->n.common->where = gfc_current_locus; | |
4192 | strcpy (st->n.common->name, name); | |
4193 | } | |
6de9cd9a | 4194 | |
8c6a85e3 | 4195 | return st->n.common; |
6de9cd9a DN |
4196 | } |
4197 | ||
4198 | ||
8c6a85e3 | 4199 | /* Match a common block name. */ |
6de9cd9a | 4200 | |
8c6a85e3 | 4201 | match match_common_name (char *name) |
6de9cd9a DN |
4202 | { |
4203 | match m; | |
4204 | ||
8c6a85e3 TB |
4205 | if (gfc_match_char ('/') == MATCH_NO) |
4206 | { | |
4207 | name[0] = '\0'; | |
4208 | return MATCH_YES; | |
4209 | } | |
6de9cd9a | 4210 | |
8c6a85e3 TB |
4211 | if (gfc_match_char ('/') == MATCH_YES) |
4212 | { | |
4213 | name[0] = '\0'; | |
4214 | return MATCH_YES; | |
4215 | } | |
6de9cd9a | 4216 | |
8c6a85e3 | 4217 | m = gfc_match_name (name); |
6de9cd9a | 4218 | |
8c6a85e3 TB |
4219 | if (m == MATCH_ERROR) |
4220 | return MATCH_ERROR; | |
4221 | if (m == MATCH_YES && gfc_match_char ('/') == MATCH_YES) | |
4222 | return MATCH_YES; | |
6de9cd9a | 4223 | |
8c6a85e3 TB |
4224 | gfc_error ("Syntax error in common block name at %C"); |
4225 | return MATCH_ERROR; | |
31fee91e MM |
4226 | } |
4227 | ||
4228 | ||
8c6a85e3 | 4229 | /* Match a COMMON statement. */ |
6de9cd9a DN |
4230 | |
4231 | match | |
8c6a85e3 | 4232 | gfc_match_common (void) |
6de9cd9a | 4233 | { |
8c6a85e3 TB |
4234 | gfc_symbol *sym, **head, *tail, *other, *old_blank_common; |
4235 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4236 | gfc_common_head *t; | |
4237 | gfc_array_spec *as; | |
4238 | gfc_equiv *e1, *e2; | |
6de9cd9a DN |
4239 | match m; |
4240 | ||
8c6a85e3 TB |
4241 | old_blank_common = gfc_current_ns->blank_common.head; |
4242 | if (old_blank_common) | |
4243 | { | |
4244 | while (old_blank_common->common_next) | |
4245 | old_blank_common = old_blank_common->common_next; | |
4246 | } | |
4247 | ||
4248 | as = NULL; | |
6de9cd9a DN |
4249 | |
4250 | for (;;) | |
4251 | { | |
8c6a85e3 TB |
4252 | m = match_common_name (name); |
4253 | if (m == MATCH_ERROR) | |
4254 | goto cleanup; | |
6de9cd9a | 4255 | |
8c6a85e3 TB |
4256 | if (name[0] == '\0') |
4257 | { | |
4258 | t = &gfc_current_ns->blank_common; | |
4259 | if (t->head == NULL) | |
4260 | t->where = gfc_current_locus; | |
4261 | } | |
4262 | else | |
4263 | { | |
4264 | t = gfc_get_common (name, 0); | |
4265 | } | |
4266 | head = &t->head; | |
4267 | ||
4268 | if (*head == NULL) | |
4269 | tail = NULL; | |
4270 | else | |
4271 | { | |
4272 | tail = *head; | |
4273 | while (tail->common_next) | |
4274 | tail = tail->common_next; | |
4275 | } | |
6de9cd9a | 4276 | |
8c6a85e3 | 4277 | /* Grab the list of symbols. */ |
6de9cd9a DN |
4278 | for (;;) |
4279 | { | |
8c6a85e3 | 4280 | m = gfc_match_symbol (&sym, 0); |
6de9cd9a DN |
4281 | if (m == MATCH_ERROR) |
4282 | goto cleanup; | |
4283 | if (m == MATCH_NO) | |
4284 | goto syntax; | |
4285 | ||
8c6a85e3 TB |
4286 | /* Store a ref to the common block for error checking. */ |
4287 | sym->common_block = t; | |
6f79f4d1 | 4288 | sym->common_block->refs++; |
8b704316 | 4289 | |
8c6a85e3 TB |
4290 | /* See if we know the current common block is bind(c), and if |
4291 | so, then see if we can check if the symbol is (which it'll | |
4292 | need to be). This can happen if the bind(c) attr stmt was | |
4293 | applied to the common block, and the variable(s) already | |
4294 | defined, before declaring the common block. */ | |
4295 | if (t->is_bind_c == 1) | |
4296 | { | |
4297 | if (sym->ts.type != BT_UNKNOWN && sym->ts.is_c_interop != 1) | |
4298 | { | |
4299 | /* If we find an error, just print it and continue, | |
4300 | cause it's just semantic, and we can see if there | |
4301 | are more errors. */ | |
4daa149b TB |
4302 | gfc_error_now_1 ("Variable '%s' at %L in common block '%s' " |
4303 | "at %C must be declared with a C " | |
4304 | "interoperable kind since common block " | |
4305 | "'%s' is bind(c)", | |
4306 | sym->name, &(sym->declared_at), t->name, | |
4307 | t->name); | |
8c6a85e3 | 4308 | } |
8b704316 | 4309 | |
8c6a85e3 | 4310 | if (sym->attr.is_bind_c == 1) |
4daa149b TB |
4311 | gfc_error_now ("Variable %qs in common block %qs at %C can not " |
4312 | "be bind(c) since it is not global", sym->name, | |
4313 | t->name); | |
8c6a85e3 | 4314 | } |
8b704316 | 4315 | |
8c6a85e3 | 4316 | if (sym->attr.in_common) |
e8ec07e1 | 4317 | { |
c4100eae | 4318 | gfc_error ("Symbol %qs at %C is already in a COMMON block", |
8c6a85e3 | 4319 | sym->name); |
e8ec07e1 PT |
4320 | goto cleanup; |
4321 | } | |
4322 | ||
8c6a85e3 TB |
4323 | if (((sym->value != NULL && sym->value->expr_type != EXPR_NULL) |
4324 | || sym->attr.data) && gfc_current_state () != COMP_BLOCK_DATA) | |
30aabb86 | 4325 | { |
524af0d6 JB |
4326 | if (!gfc_notify_std (GFC_STD_GNU, "Initialized symbol '%s' at " |
4327 | "%C can only be COMMON in BLOCK DATA", | |
4328 | sym->name)) | |
30aabb86 | 4329 | goto cleanup; |
8c6a85e3 | 4330 | } |
6de9cd9a | 4331 | |
524af0d6 | 4332 | if (!gfc_add_in_common (&sym->attr, sym->name, NULL)) |
8c6a85e3 | 4333 | goto cleanup; |
6de9cd9a | 4334 | |
8c6a85e3 TB |
4335 | if (tail != NULL) |
4336 | tail->common_next = sym; | |
4337 | else | |
4338 | *head = sym; | |
6de9cd9a | 4339 | |
8c6a85e3 | 4340 | tail = sym; |
6de9cd9a | 4341 | |
8c6a85e3 TB |
4342 | /* Deal with an optional array specification after the |
4343 | symbol name. */ | |
4344 | m = gfc_match_array_spec (&as, true, true); | |
4345 | if (m == MATCH_ERROR) | |
4346 | goto cleanup; | |
6de9cd9a | 4347 | |
8c6a85e3 TB |
4348 | if (m == MATCH_YES) |
4349 | { | |
4350 | if (as->type != AS_EXPLICIT) | |
4351 | { | |
4352 | gfc_error ("Array specification for symbol '%s' in COMMON " | |
4353 | "at %C must be explicit", sym->name); | |
4354 | goto cleanup; | |
4355 | } | |
b251af97 | 4356 | |
524af0d6 | 4357 | if (!gfc_add_dimension (&sym->attr, sym->name, NULL)) |
8c6a85e3 | 4358 | goto cleanup; |
d68bd5a8 | 4359 | |
8c6a85e3 TB |
4360 | if (sym->attr.pointer) |
4361 | { | |
4362 | gfc_error ("Symbol '%s' in COMMON at %C cannot be a " | |
4363 | "POINTER array", sym->name); | |
4364 | goto cleanup; | |
4365 | } | |
4213f93b | 4366 | |
8c6a85e3 TB |
4367 | sym->as = as; |
4368 | as = NULL; | |
4213f93b | 4369 | |
8c6a85e3 | 4370 | } |
9081e356 | 4371 | |
8c6a85e3 | 4372 | sym->common_head = t; |
4213f93b | 4373 | |
8c6a85e3 TB |
4374 | /* Check to see if the symbol is already in an equivalence group. |
4375 | If it is, set the other members as being in common. */ | |
4376 | if (sym->attr.in_equivalence) | |
4377 | { | |
4378 | for (e1 = gfc_current_ns->equiv; e1; e1 = e1->next) | |
4379 | { | |
4380 | for (e2 = e1; e2; e2 = e2->eq) | |
4381 | if (e2->expr->symtree->n.sym == sym) | |
4382 | goto equiv_found; | |
4213f93b | 4383 | |
8c6a85e3 | 4384 | continue; |
d68bd5a8 | 4385 | |
8c6a85e3 | 4386 | equiv_found: |
4213f93b | 4387 | |
8c6a85e3 TB |
4388 | for (e2 = e1; e2; e2 = e2->eq) |
4389 | { | |
4390 | other = e2->expr->symtree->n.sym; | |
4391 | if (other->common_head | |
4392 | && other->common_head != sym->common_head) | |
4393 | { | |
4394 | gfc_error ("Symbol '%s', in COMMON block '%s' at " | |
4395 | "%C is being indirectly equivalenced to " | |
4396 | "another COMMON block '%s'", | |
4397 | sym->name, sym->common_head->name, | |
4398 | other->common_head->name); | |
4399 | goto cleanup; | |
4400 | } | |
4401 | other->attr.in_common = 1; | |
4402 | other->common_head = t; | |
4403 | } | |
4404 | } | |
4405 | } | |
d68bd5a8 | 4406 | |
4213f93b | 4407 | |
8c6a85e3 TB |
4408 | gfc_gobble_whitespace (); |
4409 | if (gfc_match_eos () == MATCH_YES) | |
4410 | goto done; | |
4411 | if (gfc_peek_ascii_char () == '/') | |
4412 | break; | |
4413 | if (gfc_match_char (',') != MATCH_YES) | |
4414 | goto syntax; | |
4415 | gfc_gobble_whitespace (); | |
4416 | if (gfc_peek_ascii_char () == '/') | |
4417 | break; | |
4418 | } | |
4213f93b PT |
4419 | } |
4420 | ||
8c6a85e3 TB |
4421 | done: |
4422 | return MATCH_YES; | |
4213f93b | 4423 | |
8c6a85e3 TB |
4424 | syntax: |
4425 | gfc_syntax_error (ST_COMMON); | |
4213f93b | 4426 | |
8c6a85e3 | 4427 | cleanup: |
8c6a85e3 TB |
4428 | gfc_free_array_spec (as); |
4429 | return MATCH_ERROR; | |
4213f93b PT |
4430 | } |
4431 | ||
6de9cd9a | 4432 | |
8c6a85e3 | 4433 | /* Match a BLOCK DATA program unit. */ |
6de9cd9a DN |
4434 | |
4435 | match | |
8c6a85e3 | 4436 | gfc_match_block_data (void) |
6de9cd9a | 4437 | { |
8c6a85e3 | 4438 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
6de9cd9a | 4439 | gfc_symbol *sym; |
6de9cd9a DN |
4440 | match m; |
4441 | ||
8c6a85e3 TB |
4442 | if (gfc_match_eos () == MATCH_YES) |
4443 | { | |
4444 | gfc_new_block = NULL; | |
4445 | return MATCH_YES; | |
4446 | } | |
4447 | ||
4448 | m = gfc_match ("% %n%t", name); | |
6de9cd9a | 4449 | if (m != MATCH_YES) |
8c6a85e3 | 4450 | return MATCH_ERROR; |
6de9cd9a | 4451 | |
8c6a85e3 TB |
4452 | if (gfc_get_symbol (name, NULL, &sym)) |
4453 | return MATCH_ERROR; | |
6de9cd9a | 4454 | |
524af0d6 | 4455 | if (!gfc_add_flavor (&sym->attr, FL_BLOCK_DATA, sym->name, NULL)) |
8c6a85e3 | 4456 | return MATCH_ERROR; |
6de9cd9a | 4457 | |
8c6a85e3 | 4458 | gfc_new_block = sym; |
6de9cd9a | 4459 | |
8c6a85e3 TB |
4460 | return MATCH_YES; |
4461 | } | |
d71b89ca | 4462 | |
6de9cd9a | 4463 | |
8c6a85e3 | 4464 | /* Free a namelist structure. */ |
4213f93b | 4465 | |
8c6a85e3 TB |
4466 | void |
4467 | gfc_free_namelist (gfc_namelist *name) | |
4468 | { | |
4469 | gfc_namelist *n; | |
6de9cd9a | 4470 | |
8c6a85e3 TB |
4471 | for (; name; name = n) |
4472 | { | |
4473 | n = name->next; | |
4474 | free (name); | |
4475 | } | |
4476 | } | |
e2ab8b09 | 4477 | |
6de9cd9a | 4478 | |
dd2fc525 JJ |
4479 | /* Free an OpenMP namelist structure. */ |
4480 | ||
4481 | void | |
4482 | gfc_free_omp_namelist (gfc_omp_namelist *name) | |
4483 | { | |
4484 | gfc_omp_namelist *n; | |
4485 | ||
4486 | for (; name; name = n) | |
4487 | { | |
4488 | gfc_free_expr (name->expr); | |
b46ebd6c JJ |
4489 | if (name->udr) |
4490 | { | |
4491 | if (name->udr->combiner) | |
4492 | gfc_free_statement (name->udr->combiner); | |
4493 | if (name->udr->initializer) | |
4494 | gfc_free_statement (name->udr->initializer); | |
4495 | free (name->udr); | |
4496 | } | |
dd2fc525 JJ |
4497 | n = name->next; |
4498 | free (name); | |
4499 | } | |
4500 | } | |
4501 | ||
4502 | ||
8c6a85e3 | 4503 | /* Match a NAMELIST statement. */ |
6de9cd9a | 4504 | |
8c6a85e3 TB |
4505 | match |
4506 | gfc_match_namelist (void) | |
4507 | { | |
4508 | gfc_symbol *group_name, *sym; | |
4509 | gfc_namelist *nl; | |
4510 | match m, m2; | |
6de9cd9a | 4511 | |
8c6a85e3 TB |
4512 | m = gfc_match (" / %s /", &group_name); |
4513 | if (m == MATCH_NO) | |
4514 | goto syntax; | |
4515 | if (m == MATCH_ERROR) | |
4516 | goto error; | |
6de9cd9a | 4517 | |
8c6a85e3 TB |
4518 | for (;;) |
4519 | { | |
4520 | if (group_name->ts.type != BT_UNKNOWN) | |
4521 | { | |
4522 | gfc_error ("Namelist group name '%s' at %C already has a basic " | |
4523 | "type of %s", group_name->name, | |
4524 | gfc_typename (&group_name->ts)); | |
4525 | return MATCH_ERROR; | |
4526 | } | |
6de9cd9a | 4527 | |
8c6a85e3 TB |
4528 | if (group_name->attr.flavor == FL_NAMELIST |
4529 | && group_name->attr.use_assoc | |
524af0d6 JB |
4530 | && !gfc_notify_std (GFC_STD_GNU, "Namelist group name '%s' " |
4531 | "at %C already is USE associated and can" | |
4532 | "not be respecified.", group_name->name)) | |
8c6a85e3 | 4533 | return MATCH_ERROR; |
6de9cd9a | 4534 | |
8c6a85e3 | 4535 | if (group_name->attr.flavor != FL_NAMELIST |
524af0d6 JB |
4536 | && !gfc_add_flavor (&group_name->attr, FL_NAMELIST, |
4537 | group_name->name, NULL)) | |
8c6a85e3 | 4538 | return MATCH_ERROR; |
6de9cd9a | 4539 | |
8c6a85e3 TB |
4540 | for (;;) |
4541 | { | |
4542 | m = gfc_match_symbol (&sym, 1); | |
4543 | if (m == MATCH_NO) | |
4544 | goto syntax; | |
4545 | if (m == MATCH_ERROR) | |
4546 | goto error; | |
6de9cd9a | 4547 | |
8c6a85e3 | 4548 | if (sym->attr.in_namelist == 0 |
524af0d6 | 4549 | && !gfc_add_in_namelist (&sym->attr, sym->name, NULL)) |
8c6a85e3 | 4550 | goto error; |
6de9cd9a | 4551 | |
8c6a85e3 TB |
4552 | /* Use gfc_error_check here, rather than goto error, so that |
4553 | these are the only errors for the next two lines. */ | |
4554 | if (sym->as && sym->as->type == AS_ASSUMED_SIZE) | |
4555 | { | |
4556 | gfc_error ("Assumed size array '%s' in namelist '%s' at " | |
4557 | "%C is not allowed", sym->name, group_name->name); | |
4558 | gfc_error_check (); | |
4559 | } | |
6de9cd9a | 4560 | |
8c6a85e3 TB |
4561 | nl = gfc_get_namelist (); |
4562 | nl->sym = sym; | |
4563 | sym->refs++; | |
6de9cd9a | 4564 | |
8c6a85e3 TB |
4565 | if (group_name->namelist == NULL) |
4566 | group_name->namelist = group_name->namelist_tail = nl; | |
4567 | else | |
4568 | { | |
4569 | group_name->namelist_tail->next = nl; | |
4570 | group_name->namelist_tail = nl; | |
4571 | } | |
6de9cd9a | 4572 | |
8c6a85e3 TB |
4573 | if (gfc_match_eos () == MATCH_YES) |
4574 | goto done; | |
6de9cd9a | 4575 | |
8c6a85e3 | 4576 | m = gfc_match_char (','); |
6de9cd9a | 4577 | |
8c6a85e3 TB |
4578 | if (gfc_match_char ('/') == MATCH_YES) |
4579 | { | |
4580 | m2 = gfc_match (" %s /", &group_name); | |
4581 | if (m2 == MATCH_YES) | |
4582 | break; | |
4583 | if (m2 == MATCH_ERROR) | |
4584 | goto error; | |
4585 | goto syntax; | |
4586 | } | |
6de9cd9a | 4587 | |
8c6a85e3 TB |
4588 | if (m != MATCH_YES) |
4589 | goto syntax; | |
6de9cd9a DN |
4590 | } |
4591 | } | |
4592 | ||
8c6a85e3 | 4593 | done: |
6de9cd9a DN |
4594 | return MATCH_YES; |
4595 | ||
8c6a85e3 TB |
4596 | syntax: |
4597 | gfc_syntax_error (ST_NAMELIST); | |
6de9cd9a | 4598 | |
8c6a85e3 | 4599 | error: |
6de9cd9a DN |
4600 | return MATCH_ERROR; |
4601 | } | |
4602 | ||
4603 | ||
8c6a85e3 | 4604 | /* Match a MODULE statement. */ |
6de9cd9a | 4605 | |
8c6a85e3 TB |
4606 | match |
4607 | gfc_match_module (void) | |
6de9cd9a | 4608 | { |
6de9cd9a DN |
4609 | match m; |
4610 | ||
8c6a85e3 | 4611 | m = gfc_match (" %s%t", &gfc_new_block); |
6de9cd9a DN |
4612 | if (m != MATCH_YES) |
4613 | return m; | |
4614 | ||
524af0d6 JB |
4615 | if (!gfc_add_flavor (&gfc_new_block->attr, FL_MODULE, |
4616 | gfc_new_block->name, NULL)) | |
8c6a85e3 | 4617 | return MATCH_ERROR; |
6de9cd9a | 4618 | |
8c6a85e3 | 4619 | return MATCH_YES; |
6de9cd9a DN |
4620 | } |
4621 | ||
4622 | ||
8c6a85e3 TB |
4623 | /* Free equivalence sets and lists. Recursively is the easiest way to |
4624 | do this. */ | |
6de9cd9a | 4625 | |
8c6a85e3 TB |
4626 | void |
4627 | gfc_free_equiv_until (gfc_equiv *eq, gfc_equiv *stop) | |
6de9cd9a | 4628 | { |
8c6a85e3 TB |
4629 | if (eq == stop) |
4630 | return; | |
6de9cd9a | 4631 | |
8c6a85e3 TB |
4632 | gfc_free_equiv (eq->eq); |
4633 | gfc_free_equiv_until (eq->next, stop); | |
4634 | gfc_free_expr (eq->expr); | |
4635 | free (eq); | |
4636 | } | |
6de9cd9a | 4637 | |
6de9cd9a | 4638 | |
8c6a85e3 TB |
4639 | void |
4640 | gfc_free_equiv (gfc_equiv *eq) | |
4641 | { | |
4642 | gfc_free_equiv_until (eq, NULL); | |
6de9cd9a DN |
4643 | } |
4644 | ||
4645 | ||
8c6a85e3 | 4646 | /* Match an EQUIVALENCE statement. */ |
7431bf06 | 4647 | |
8c6a85e3 TB |
4648 | match |
4649 | gfc_match_equivalence (void) | |
7431bf06 | 4650 | { |
8c6a85e3 TB |
4651 | gfc_equiv *eq, *set, *tail; |
4652 | gfc_ref *ref; | |
4653 | gfc_symbol *sym; | |
4654 | match m; | |
4655 | gfc_common_head *common_head = NULL; | |
4656 | bool common_flag; | |
4657 | int cnt; | |
7431bf06 | 4658 | |
8c6a85e3 | 4659 | tail = NULL; |
7431bf06 | 4660 | |
8c6a85e3 TB |
4661 | for (;;) |
4662 | { | |
4663 | eq = gfc_get_equiv (); | |
4664 | if (tail == NULL) | |
4665 | tail = eq; | |
7431bf06 | 4666 | |
8c6a85e3 TB |
4667 | eq->next = gfc_current_ns->equiv; |
4668 | gfc_current_ns->equiv = eq; | |
7431bf06 | 4669 | |
8c6a85e3 TB |
4670 | if (gfc_match_char ('(') != MATCH_YES) |
4671 | goto syntax; | |
7431bf06 | 4672 | |
8c6a85e3 TB |
4673 | set = eq; |
4674 | common_flag = FALSE; | |
4675 | cnt = 0; | |
7431bf06 | 4676 | |
8c6a85e3 TB |
4677 | for (;;) |
4678 | { | |
4679 | m = gfc_match_equiv_variable (&set->expr); | |
4680 | if (m == MATCH_ERROR) | |
4681 | goto cleanup; | |
4682 | if (m == MATCH_NO) | |
4683 | goto syntax; | |
3e78238a | 4684 | |
8c6a85e3 TB |
4685 | /* count the number of objects. */ |
4686 | cnt++; | |
4687 | ||
4688 | if (gfc_match_char ('%') == MATCH_YES) | |
4689 | { | |
4690 | gfc_error ("Derived type component %C is not a " | |
4691 | "permitted EQUIVALENCE member"); | |
4692 | goto cleanup; | |
4693 | } | |
7431bf06 | 4694 | |
8c6a85e3 TB |
4695 | for (ref = set->expr->ref; ref; ref = ref->next) |
4696 | if (ref->type == REF_ARRAY && ref->u.ar.type == AR_SECTION) | |
4697 | { | |
4698 | gfc_error ("Array reference in EQUIVALENCE at %C cannot " | |
4699 | "be an array section"); | |
4700 | goto cleanup; | |
4701 | } | |
7431bf06 | 4702 | |
8c6a85e3 | 4703 | sym = set->expr->symtree->n.sym; |
cf2b3c22 | 4704 | |
524af0d6 | 4705 | if (!gfc_add_in_equivalence (&sym->attr, sym->name, NULL)) |
8c6a85e3 | 4706 | goto cleanup; |
cf2b3c22 | 4707 | |
8c6a85e3 TB |
4708 | if (sym->attr.in_common) |
4709 | { | |
4710 | common_flag = TRUE; | |
4711 | common_head = sym->common_head; | |
4712 | } | |
4713 | ||
4714 | if (gfc_match_char (')') == MATCH_YES) | |
4715 | break; | |
cf2b3c22 | 4716 | |
8c6a85e3 TB |
4717 | if (gfc_match_char (',') != MATCH_YES) |
4718 | goto syntax; | |
cf2b3c22 | 4719 | |
8c6a85e3 TB |
4720 | set->eq = gfc_get_equiv (); |
4721 | set = set->eq; | |
4722 | } | |
93d76687 | 4723 | |
8c6a85e3 | 4724 | if (cnt < 2) |
bc382218 | 4725 | { |
8c6a85e3 | 4726 | gfc_error ("EQUIVALENCE at %C requires two or more objects"); |
bc382218 JW |
4727 | goto cleanup; |
4728 | } | |
cf2b3c22 | 4729 | |
8c6a85e3 TB |
4730 | /* If one of the members of an equivalence is in common, then |
4731 | mark them all as being in common. Before doing this, check | |
4732 | that members of the equivalence group are not in different | |
4733 | common blocks. */ | |
4734 | if (common_flag) | |
4735 | for (set = eq; set; set = set->eq) | |
4736 | { | |
4737 | sym = set->expr->symtree->n.sym; | |
4738 | if (sym->common_head && sym->common_head != common_head) | |
4739 | { | |
4740 | gfc_error ("Attempt to indirectly overlap COMMON " | |
4741 | "blocks %s and %s by EQUIVALENCE at %C", | |
4742 | sym->common_head->name, common_head->name); | |
4743 | goto cleanup; | |
4744 | } | |
4745 | sym->attr.in_common = 1; | |
4746 | sym->common_head = common_head; | |
4747 | } | |
cf2b3c22 | 4748 | |
8c6a85e3 TB |
4749 | if (gfc_match_eos () == MATCH_YES) |
4750 | break; | |
4751 | if (gfc_match_char (',') != MATCH_YES) | |
4752 | { | |
4753 | gfc_error ("Expecting a comma in EQUIVALENCE at %C"); | |
4754 | goto cleanup; | |
4755 | } | |
cf2b3c22 TB |
4756 | } |
4757 | ||
8c6a85e3 | 4758 | return MATCH_YES; |
cf2b3c22 | 4759 | |
8c6a85e3 TB |
4760 | syntax: |
4761 | gfc_syntax_error (ST_EQUIVALENCE); | |
cf2b3c22 | 4762 | |
bc382218 | 4763 | cleanup: |
8c6a85e3 TB |
4764 | eq = tail->next; |
4765 | tail->next = NULL; | |
4766 | ||
4767 | gfc_free_equiv (gfc_current_ns->equiv); | |
4768 | gfc_current_ns->equiv = eq; | |
4769 | ||
4770 | return MATCH_ERROR; | |
cf2b3c22 TB |
4771 | } |
4772 | ||
4773 | ||
8c6a85e3 TB |
4774 | /* Check that a statement function is not recursive. This is done by looking |
4775 | for the statement function symbol(sym) by looking recursively through its | |
8b704316 | 4776 | expression(e). If a reference to sym is found, true is returned. |
8c6a85e3 TB |
4777 | 12.5.4 requires that any variable of function that is implicitly typed |
4778 | shall have that type confirmed by any subsequent type declaration. The | |
4779 | implicit typing is conveniently done here. */ | |
4780 | static bool | |
4781 | recursive_stmt_fcn (gfc_expr *, gfc_symbol *); | |
6de9cd9a | 4782 | |
8c6a85e3 TB |
4783 | static bool |
4784 | check_stmt_fcn (gfc_expr *e, gfc_symbol *sym, int *f ATTRIBUTE_UNUSED) | |
6de9cd9a | 4785 | { |
6de9cd9a | 4786 | |
8c6a85e3 TB |
4787 | if (e == NULL) |
4788 | return false; | |
6de9cd9a | 4789 | |
8c6a85e3 | 4790 | switch (e->expr_type) |
6de9cd9a | 4791 | { |
8c6a85e3 TB |
4792 | case EXPR_FUNCTION: |
4793 | if (e->symtree == NULL) | |
4794 | return false; | |
6de9cd9a | 4795 | |
8c6a85e3 TB |
4796 | /* Check the name before testing for nested recursion! */ |
4797 | if (sym->name == e->symtree->n.sym->name) | |
4798 | return true; | |
6de9cd9a | 4799 | |
8c6a85e3 TB |
4800 | /* Catch recursion via other statement functions. */ |
4801 | if (e->symtree->n.sym->attr.proc == PROC_ST_FUNCTION | |
4802 | && e->symtree->n.sym->value | |
4803 | && recursive_stmt_fcn (e->symtree->n.sym->value, sym)) | |
4804 | return true; | |
6de9cd9a | 4805 | |
8c6a85e3 TB |
4806 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) |
4807 | gfc_set_default_type (e->symtree->n.sym, 0, NULL); | |
6de9cd9a | 4808 | |
8c6a85e3 | 4809 | break; |
6de9cd9a | 4810 | |
8c6a85e3 TB |
4811 | case EXPR_VARIABLE: |
4812 | if (e->symtree && sym->name == e->symtree->n.sym->name) | |
4813 | return true; | |
6de9cd9a | 4814 | |
8c6a85e3 TB |
4815 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) |
4816 | gfc_set_default_type (e->symtree->n.sym, 0, NULL); | |
4817 | break; | |
6de9cd9a | 4818 | |
8c6a85e3 TB |
4819 | default: |
4820 | break; | |
6de9cd9a DN |
4821 | } |
4822 | ||
8c6a85e3 TB |
4823 | return false; |
4824 | } | |
6de9cd9a | 4825 | |
6de9cd9a | 4826 | |
8c6a85e3 TB |
4827 | static bool |
4828 | recursive_stmt_fcn (gfc_expr *e, gfc_symbol *sym) | |
4829 | { | |
4830 | return gfc_traverse_expr (e, sym, check_stmt_fcn, 0); | |
6de9cd9a DN |
4831 | } |
4832 | ||
cf2b3c22 | 4833 | |
8c6a85e3 TB |
4834 | /* Match a statement function declaration. It is so easy to match |
4835 | non-statement function statements with a MATCH_ERROR as opposed to | |
4836 | MATCH_NO that we suppress error message in most cases. */ | |
cf2b3c22 TB |
4837 | |
4838 | match | |
8c6a85e3 | 4839 | gfc_match_st_function (void) |
cf2b3c22 | 4840 | { |
c4100eae MLI |
4841 | gfc_error_buf old_error_1; |
4842 | output_buffer old_error; | |
4843 | ||
8c6a85e3 TB |
4844 | gfc_symbol *sym; |
4845 | gfc_expr *expr; | |
cf2b3c22 | 4846 | match m; |
cf2b3c22 | 4847 | |
8c6a85e3 TB |
4848 | m = gfc_match_symbol (&sym, 0); |
4849 | if (m != MATCH_YES) | |
4850 | return m; | |
4851 | ||
c4100eae | 4852 | gfc_push_error (&old_error, &old_error_1); |
8c6a85e3 | 4853 | |
524af0d6 | 4854 | if (!gfc_add_procedure (&sym->attr, PROC_ST_FUNCTION, sym->name, NULL)) |
8c6a85e3 TB |
4855 | goto undo_error; |
4856 | ||
4857 | if (gfc_match_formal_arglist (sym, 1, 0) != MATCH_YES) | |
4858 | goto undo_error; | |
4859 | ||
4860 | m = gfc_match (" = %e%t", &expr); | |
4861 | if (m == MATCH_NO) | |
4862 | goto undo_error; | |
4863 | ||
c4100eae MLI |
4864 | gfc_free_error (&old_error, &old_error_1); |
4865 | ||
8c6a85e3 TB |
4866 | if (m == MATCH_ERROR) |
4867 | return m; | |
4868 | ||
4869 | if (recursive_stmt_fcn (expr, sym)) | |
cf2b3c22 | 4870 | { |
8c6a85e3 | 4871 | gfc_error ("Statement function at %L is recursive", &expr->where); |
cf2b3c22 TB |
4872 | return MATCH_ERROR; |
4873 | } | |
4874 | ||
8c6a85e3 | 4875 | sym->value = expr; |
cf2b3c22 | 4876 | |
524af0d6 | 4877 | if (!gfc_notify_std (GFC_STD_F95_OBS, "Statement function at %C")) |
8c6a85e3 | 4878 | return MATCH_ERROR; |
cf2b3c22 | 4879 | |
8c6a85e3 | 4880 | return MATCH_YES; |
cf2b3c22 | 4881 | |
8c6a85e3 | 4882 | undo_error: |
c4100eae | 4883 | gfc_pop_error (&old_error, &old_error_1); |
8c6a85e3 TB |
4884 | return MATCH_NO; |
4885 | } | |
cf2b3c22 | 4886 | |
cf2b3c22 | 4887 | |
8c6a85e3 TB |
4888 | /***************** SELECT CASE subroutines ******************/ |
4889 | ||
4890 | /* Free a single case structure. */ | |
4891 | ||
4892 | static void | |
4893 | free_case (gfc_case *p) | |
4894 | { | |
4895 | if (p->low == p->high) | |
4896 | p->high = NULL; | |
4897 | gfc_free_expr (p->low); | |
4898 | gfc_free_expr (p->high); | |
4899 | free (p); | |
4900 | } | |
cf2b3c22 | 4901 | |
cf2b3c22 | 4902 | |
8c6a85e3 | 4903 | /* Free a list of case structures. */ |
cf2b3c22 | 4904 | |
8c6a85e3 TB |
4905 | void |
4906 | gfc_free_case_list (gfc_case *p) | |
4907 | { | |
4908 | gfc_case *q; | |
cf2b3c22 | 4909 | |
8c6a85e3 TB |
4910 | for (; p; p = q) |
4911 | { | |
4912 | q = p->next; | |
4913 | free_case (p); | |
4914 | } | |
cf2b3c22 TB |
4915 | } |
4916 | ||
4917 | ||
8c6a85e3 | 4918 | /* Match a single case selector. */ |
cf2b3c22 | 4919 | |
8c6a85e3 TB |
4920 | static match |
4921 | match_case_selector (gfc_case **cp) | |
cf2b3c22 | 4922 | { |
8c6a85e3 | 4923 | gfc_case *c; |
cf2b3c22 TB |
4924 | match m; |
4925 | ||
8c6a85e3 TB |
4926 | c = gfc_get_case (); |
4927 | c->where = gfc_current_locus; | |
cf2b3c22 | 4928 | |
8c6a85e3 | 4929 | if (gfc_match_char (':') == MATCH_YES) |
cf2b3c22 | 4930 | { |
8c6a85e3 | 4931 | m = gfc_match_init_expr (&c->high); |
cf2b3c22 | 4932 | if (m == MATCH_NO) |
8c6a85e3 TB |
4933 | goto need_expr; |
4934 | if (m == MATCH_ERROR) | |
4935 | goto cleanup; | |
4936 | } | |
4937 | else | |
4938 | { | |
4939 | m = gfc_match_init_expr (&c->low); | |
cf2b3c22 TB |
4940 | if (m == MATCH_ERROR) |
4941 | goto cleanup; | |
8c6a85e3 TB |
4942 | if (m == MATCH_NO) |
4943 | goto need_expr; | |
cf2b3c22 | 4944 | |
8c6a85e3 TB |
4945 | /* If we're not looking at a ':' now, make a range out of a single |
4946 | target. Else get the upper bound for the case range. */ | |
4947 | if (gfc_match_char (':') != MATCH_YES) | |
4948 | c->high = c->low; | |
4949 | else | |
4950 | { | |
4951 | m = gfc_match_init_expr (&c->high); | |
4952 | if (m == MATCH_ERROR) | |
4953 | goto cleanup; | |
4954 | /* MATCH_NO is fine. It's OK if nothing is there! */ | |
4955 | } | |
cf2b3c22 TB |
4956 | } |
4957 | ||
8c6a85e3 TB |
4958 | *cp = c; |
4959 | return MATCH_YES; | |
cf2b3c22 | 4960 | |
8c6a85e3 TB |
4961 | need_expr: |
4962 | gfc_error ("Expected initialization expression in CASE at %C"); | |
cf2b3c22 | 4963 | |
8c6a85e3 TB |
4964 | cleanup: |
4965 | free_case (c); | |
4966 | return MATCH_ERROR; | |
4967 | } | |
cf2b3c22 | 4968 | |
cf2b3c22 | 4969 | |
8c6a85e3 | 4970 | /* Match the end of a case statement. */ |
cf2b3c22 | 4971 | |
8c6a85e3 TB |
4972 | static match |
4973 | match_case_eos (void) | |
4974 | { | |
4975 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4976 | match m; | |
cf2b3c22 | 4977 | |
8c6a85e3 TB |
4978 | if (gfc_match_eos () == MATCH_YES) |
4979 | return MATCH_YES; | |
cf2b3c22 | 4980 | |
8c6a85e3 TB |
4981 | /* If the case construct doesn't have a case-construct-name, we |
4982 | should have matched the EOS. */ | |
4983 | if (!gfc_current_block ()) | |
4984 | return MATCH_NO; | |
cf2b3c22 | 4985 | |
8c6a85e3 | 4986 | gfc_gobble_whitespace (); |
cf2b3c22 | 4987 | |
8c6a85e3 TB |
4988 | m = gfc_match_name (name); |
4989 | if (m != MATCH_YES) | |
4990 | return m; | |
cf2b3c22 | 4991 | |
8c6a85e3 TB |
4992 | if (strcmp (name, gfc_current_block ()->name) != 0) |
4993 | { | |
4994 | gfc_error ("Expected block name '%s' of SELECT construct at %C", | |
4995 | gfc_current_block ()->name); | |
4996 | return MATCH_ERROR; | |
4997 | } | |
cf2b3c22 | 4998 | |
8c6a85e3 TB |
4999 | return gfc_match_eos (); |
5000 | } | |
cf2b3c22 | 5001 | |
6de9cd9a | 5002 | |
8c6a85e3 | 5003 | /* Match a SELECT statement. */ |
c874ae73 | 5004 | |
8c6a85e3 TB |
5005 | match |
5006 | gfc_match_select (void) | |
c874ae73 TS |
5007 | { |
5008 | gfc_expr *expr; | |
c874ae73 TS |
5009 | match m; |
5010 | ||
8c6a85e3 TB |
5011 | m = gfc_match_label (); |
5012 | if (m == MATCH_ERROR) | |
5013 | return m; | |
5014 | ||
5015 | m = gfc_match (" select case ( %e )%t", &expr); | |
c874ae73 TS |
5016 | if (m != MATCH_YES) |
5017 | return m; | |
5018 | ||
8c6a85e3 TB |
5019 | new_st.op = EXEC_SELECT; |
5020 | new_st.expr1 = expr; | |
c874ae73 | 5021 | |
8c6a85e3 TB |
5022 | return MATCH_YES; |
5023 | } | |
c874ae73 | 5024 | |
c874ae73 | 5025 | |
8f75db9f PT |
5026 | /* Transfer the selector typespec to the associate name. */ |
5027 | ||
5028 | static void | |
5029 | copy_ts_from_selector_to_associate (gfc_expr *associate, gfc_expr *selector) | |
5030 | { | |
5031 | gfc_ref *ref; | |
5032 | gfc_symbol *assoc_sym; | |
5033 | ||
5034 | assoc_sym = associate->symtree->n.sym; | |
5035 | ||
8f75db9f PT |
5036 | /* At this stage the expression rank and arrayspec dimensions have |
5037 | not been completely sorted out. We must get the expr2->rank | |
5038 | right here, so that the correct class container is obtained. */ | |
5039 | ref = selector->ref; | |
5040 | while (ref && ref->next) | |
5041 | ref = ref->next; | |
5042 | ||
a7a6a027 JW |
5043 | if (selector->ts.type == BT_CLASS && CLASS_DATA (selector)->as |
5044 | && ref && ref->type == REF_ARRAY) | |
8f75db9f | 5045 | { |
e4821cd8 PT |
5046 | /* Ensure that the array reference type is set. We cannot use |
5047 | gfc_resolve_expr at this point, so the usable parts of | |
5048 | resolve.c(resolve_array_ref) are employed to do it. */ | |
5049 | if (ref->u.ar.type == AR_UNKNOWN) | |
5050 | { | |
5051 | ref->u.ar.type = AR_ELEMENT; | |
a7a6a027 | 5052 | for (int i = 0; i < ref->u.ar.dimen + ref->u.ar.codimen; i++) |
e4821cd8 PT |
5053 | if (ref->u.ar.dimen_type[i] == DIMEN_RANGE |
5054 | || ref->u.ar.dimen_type[i] == DIMEN_VECTOR | |
5055 | || (ref->u.ar.dimen_type[i] == DIMEN_UNKNOWN | |
5056 | && ref->u.ar.start[i] && ref->u.ar.start[i]->rank)) | |
5057 | { | |
5058 | ref->u.ar.type = AR_SECTION; | |
5059 | break; | |
5060 | } | |
5061 | } | |
5062 | ||
8f75db9f PT |
5063 | if (ref->u.ar.type == AR_FULL) |
5064 | selector->rank = CLASS_DATA (selector)->as->rank; | |
5065 | else if (ref->u.ar.type == AR_SECTION) | |
5066 | selector->rank = ref->u.ar.dimen; | |
5067 | else | |
5068 | selector->rank = 0; | |
5069 | } | |
5070 | ||
a7a6a027 | 5071 | if (selector->rank) |
8f75db9f | 5072 | { |
a7a6a027 JW |
5073 | assoc_sym->attr.dimension = 1; |
5074 | assoc_sym->as = gfc_get_array_spec (); | |
5075 | assoc_sym->as->rank = selector->rank; | |
5076 | assoc_sym->as->type = AS_DEFERRED; | |
8f75db9f PT |
5077 | } |
5078 | else | |
a7a6a027 JW |
5079 | assoc_sym->as = NULL; |
5080 | ||
5081 | if (selector->ts.type == BT_CLASS) | |
8f75db9f PT |
5082 | { |
5083 | /* The correct class container has to be available. */ | |
8f75db9f PT |
5084 | assoc_sym->ts.type = BT_CLASS; |
5085 | assoc_sym->ts.u.derived = CLASS_DATA (selector)->ts.u.derived; | |
5086 | assoc_sym->attr.pointer = 1; | |
9b6da3c7 | 5087 | gfc_build_class_symbol (&assoc_sym->ts, &assoc_sym->attr, &assoc_sym->as); |
8f75db9f PT |
5088 | } |
5089 | } | |
5090 | ||
5091 | ||
8c6a85e3 | 5092 | /* Push the current selector onto the SELECT TYPE stack. */ |
c874ae73 | 5093 | |
8c6a85e3 TB |
5094 | static void |
5095 | select_type_push (gfc_symbol *sel) | |
5096 | { | |
5097 | gfc_select_type_stack *top = gfc_get_select_type_stack (); | |
5098 | top->selector = sel; | |
5099 | top->tmp = NULL; | |
5100 | top->prev = select_type_stack; | |
c874ae73 | 5101 | |
8c6a85e3 TB |
5102 | select_type_stack = top; |
5103 | } | |
c874ae73 | 5104 | |
c874ae73 | 5105 | |
8b704316 PT |
5106 | /* Set the temporary for the current intrinsic SELECT TYPE selector. */ |
5107 | ||
5108 | static gfc_symtree * | |
5109 | select_intrinsic_set_tmp (gfc_typespec *ts) | |
5110 | { | |
5111 | char name[GFC_MAX_SYMBOL_LEN]; | |
5112 | gfc_symtree *tmp; | |
5113 | int charlen = 0; | |
5114 | ||
5115 | if (ts->type == BT_CLASS || ts->type == BT_DERIVED) | |
5116 | return NULL; | |
5117 | ||
5118 | if (select_type_stack->selector->ts.type == BT_CLASS | |
5119 | && !select_type_stack->selector->attr.class_ok) | |
5120 | return NULL; | |
5121 | ||
5122 | if (ts->type == BT_CHARACTER && ts->u.cl && ts->u.cl->length | |
5123 | && ts->u.cl->length->expr_type == EXPR_CONSTANT) | |
5124 | charlen = mpz_get_si (ts->u.cl->length->value.integer); | |
5125 | ||
5126 | if (ts->type != BT_CHARACTER) | |
5127 | sprintf (name, "__tmp_%s_%d", gfc_basic_typename (ts->type), | |
5128 | ts->kind); | |
5129 | else | |
5130 | sprintf (name, "__tmp_%s_%d_%d", gfc_basic_typename (ts->type), | |
5131 | charlen, ts->kind); | |
5132 | ||
5133 | gfc_get_sym_tree (name, gfc_current_ns, &tmp, false); | |
5134 | gfc_add_type (tmp->n.sym, ts, NULL); | |
5135 | ||
5136 | /* Copy across the array spec to the selector. */ | |
5137 | if (select_type_stack->selector->ts.type == BT_CLASS | |
5138 | && (CLASS_DATA (select_type_stack->selector)->attr.dimension | |
5139 | || CLASS_DATA (select_type_stack->selector)->attr.codimension)) | |
5140 | { | |
5141 | tmp->n.sym->attr.pointer = 1; | |
5142 | tmp->n.sym->attr.dimension | |
5143 | = CLASS_DATA (select_type_stack->selector)->attr.dimension; | |
5144 | tmp->n.sym->attr.codimension | |
5145 | = CLASS_DATA (select_type_stack->selector)->attr.codimension; | |
5146 | tmp->n.sym->as | |
5147 | = gfc_copy_array_spec (CLASS_DATA (select_type_stack->selector)->as); | |
5148 | } | |
5149 | ||
5150 | gfc_set_sym_referenced (tmp->n.sym); | |
5151 | gfc_add_flavor (&tmp->n.sym->attr, FL_VARIABLE, name, NULL); | |
5152 | tmp->n.sym->attr.select_type_temporary = 1; | |
5153 | ||
5154 | return tmp; | |
5155 | } | |
5156 | ||
5157 | ||
fca04db3 | 5158 | /* Set up a temporary for the current TYPE IS / CLASS IS branch . */ |
c874ae73 | 5159 | |
fca04db3 JW |
5160 | static void |
5161 | select_type_set_tmp (gfc_typespec *ts) | |
8c6a85e3 TB |
5162 | { |
5163 | char name[GFC_MAX_SYMBOL_LEN]; | |
8b704316 | 5164 | gfc_symtree *tmp = NULL; |
8f75db9f | 5165 | |
fca04db3 | 5166 | if (!ts) |
8c6a85e3 | 5167 | { |
fca04db3 JW |
5168 | select_type_stack->tmp = NULL; |
5169 | return; | |
8c6a85e3 | 5170 | } |
8c6a85e3 | 5171 | |
8b704316 | 5172 | tmp = select_intrinsic_set_tmp (ts); |
c49ea23d | 5173 | |
8b704316 | 5174 | if (tmp == NULL) |
c49ea23d | 5175 | { |
4cc70466 PT |
5176 | if (!ts->u.derived) |
5177 | return; | |
5178 | ||
8b704316 PT |
5179 | if (ts->type == BT_CLASS) |
5180 | sprintf (name, "__tmp_class_%s", ts->u.derived->name); | |
5181 | else | |
5182 | sprintf (name, "__tmp_type_%s", ts->u.derived->name); | |
5183 | gfc_get_sym_tree (name, gfc_current_ns, &tmp, false); | |
5184 | gfc_add_type (tmp->n.sym, ts, NULL); | |
fca04db3 | 5185 | |
8b704316 PT |
5186 | if (select_type_stack->selector->ts.type == BT_CLASS |
5187 | && select_type_stack->selector->attr.class_ok) | |
fca04db3 | 5188 | { |
8b704316 PT |
5189 | tmp->n.sym->attr.pointer |
5190 | = CLASS_DATA (select_type_stack->selector)->attr.class_pointer; | |
5191 | ||
5192 | /* Copy across the array spec to the selector. */ | |
5193 | if (CLASS_DATA (select_type_stack->selector)->attr.dimension | |
5194 | || CLASS_DATA (select_type_stack->selector)->attr.codimension) | |
5195 | { | |
5196 | tmp->n.sym->attr.dimension | |
fca04db3 | 5197 | = CLASS_DATA (select_type_stack->selector)->attr.dimension; |
8b704316 | 5198 | tmp->n.sym->attr.codimension |
fca04db3 | 5199 | = CLASS_DATA (select_type_stack->selector)->attr.codimension; |
8b704316 | 5200 | tmp->n.sym->as |
fca04db3 | 5201 | = gfc_copy_array_spec (CLASS_DATA (select_type_stack->selector)->as); |
8b704316 | 5202 | } |
c49ea23d PT |
5203 | } |
5204 | ||
8c6a85e3 | 5205 | gfc_set_sym_referenced (tmp->n.sym); |
8c6a85e3 | 5206 | gfc_add_flavor (&tmp->n.sym->attr, FL_VARIABLE, name, NULL); |
7d40e49f | 5207 | tmp->n.sym->attr.select_type_temporary = 1; |
8f75db9f | 5208 | |
8c6a85e3 | 5209 | if (ts->type == BT_CLASS) |
fca04db3 | 5210 | gfc_build_class_symbol (&tmp->n.sym->ts, &tmp->n.sym->attr, |
9b6da3c7 | 5211 | &tmp->n.sym->as); |
8b704316 | 5212 | } |
8c6a85e3 TB |
5213 | |
5214 | /* Add an association for it, so the rest of the parser knows it is | |
5215 | an associate-name. The target will be set during resolution. */ | |
5216 | tmp->n.sym->assoc = gfc_get_association_list (); | |
5217 | tmp->n.sym->assoc->dangling = 1; | |
5218 | tmp->n.sym->assoc->st = tmp; | |
5219 | ||
5220 | select_type_stack->tmp = tmp; | |
c874ae73 TS |
5221 | } |
5222 | ||
8b704316 | 5223 | |
8c6a85e3 | 5224 | /* Match a SELECT TYPE statement. */ |
6de9cd9a DN |
5225 | |
5226 | match | |
8c6a85e3 | 5227 | gfc_match_select_type (void) |
6de9cd9a | 5228 | { |
8c6a85e3 TB |
5229 | gfc_expr *expr1, *expr2 = NULL; |
5230 | match m; | |
5231 | char name[GFC_MAX_SYMBOL_LEN]; | |
c49ea23d | 5232 | bool class_array; |
8f75db9f | 5233 | gfc_symbol *sym; |
6de9cd9a | 5234 | |
8c6a85e3 TB |
5235 | m = gfc_match_label (); |
5236 | if (m == MATCH_ERROR) | |
5237 | return m; | |
6de9cd9a | 5238 | |
8c6a85e3 | 5239 | m = gfc_match (" select type ( "); |
6de9cd9a DN |
5240 | if (m != MATCH_YES) |
5241 | return m; | |
5242 | ||
8c6a85e3 TB |
5243 | m = gfc_match (" %n => %e", name, &expr2); |
5244 | if (m == MATCH_YES) | |
5245 | { | |
5246 | expr1 = gfc_get_expr(); | |
5247 | expr1->expr_type = EXPR_VARIABLE; | |
5248 | if (gfc_get_sym_tree (name, NULL, &expr1->symtree, false)) | |
5249 | { | |
5250 | m = MATCH_ERROR; | |
5251 | goto cleanup; | |
5252 | } | |
8f75db9f PT |
5253 | |
5254 | sym = expr1->symtree->n.sym; | |
8c6a85e3 | 5255 | if (expr2->ts.type == BT_UNKNOWN) |
8f75db9f | 5256 | sym->attr.untyped = 1; |
8c6a85e3 | 5257 | else |
8f75db9f PT |
5258 | copy_ts_from_selector_to_associate (expr1, expr2); |
5259 | ||
5260 | sym->attr.flavor = FL_VARIABLE; | |
5261 | sym->attr.referenced = 1; | |
5262 | sym->attr.class_ok = 1; | |
8c6a85e3 TB |
5263 | } |
5264 | else | |
6de9cd9a | 5265 | { |
8c6a85e3 TB |
5266 | m = gfc_match (" %e ", &expr1); |
5267 | if (m != MATCH_YES) | |
36abe895 | 5268 | return m; |
6de9cd9a DN |
5269 | } |
5270 | ||
8c6a85e3 | 5271 | m = gfc_match (" )%t"); |
6de9cd9a | 5272 | if (m != MATCH_YES) |
a5e52264 MM |
5273 | { |
5274 | gfc_error ("parse error in SELECT TYPE statement at %C"); | |
5275 | goto cleanup; | |
5276 | } | |
8c6a85e3 | 5277 | |
c49ea23d PT |
5278 | /* This ghastly expression seems to be needed to distinguish a CLASS |
5279 | array, which can have a reference, from other expressions that | |
5280 | have references, such as derived type components, and are not | |
5281 | allowed by the standard. | |
ee3bea0b | 5282 | TODO: see if it is sufficient to exclude component and substring |
c49ea23d PT |
5283 | references. */ |
5284 | class_array = expr1->expr_type == EXPR_VARIABLE | |
ee3bea0b | 5285 | && expr1->ts.type == BT_CLASS |
c49ea23d PT |
5286 | && CLASS_DATA (expr1) |
5287 | && (strcmp (CLASS_DATA (expr1)->name, "_data") == 0) | |
cd99c23c TB |
5288 | && (CLASS_DATA (expr1)->attr.dimension |
5289 | || CLASS_DATA (expr1)->attr.codimension) | |
c49ea23d PT |
5290 | && expr1->ref |
5291 | && expr1->ref->type == REF_ARRAY | |
5292 | && expr1->ref->next == NULL; | |
5293 | ||
8c6a85e3 | 5294 | /* Check for F03:C811. */ |
c49ea23d PT |
5295 | if (!expr2 && (expr1->expr_type != EXPR_VARIABLE |
5296 | || (!class_array && expr1->ref != NULL))) | |
6de9cd9a | 5297 | { |
8c6a85e3 TB |
5298 | gfc_error ("Selector in SELECT TYPE at %C is not a named variable; " |
5299 | "use associate-name=>"); | |
5300 | m = MATCH_ERROR; | |
5301 | goto cleanup; | |
6de9cd9a DN |
5302 | } |
5303 | ||
8c6a85e3 TB |
5304 | new_st.op = EXEC_SELECT_TYPE; |
5305 | new_st.expr1 = expr1; | |
5306 | new_st.expr2 = expr2; | |
5307 | new_st.ext.block.ns = gfc_current_ns; | |
6de9cd9a | 5308 | |
8c6a85e3 | 5309 | select_type_push (expr1->symtree->n.sym); |
6de9cd9a DN |
5310 | |
5311 | return MATCH_YES; | |
8b704316 | 5312 | |
8c6a85e3 | 5313 | cleanup: |
36abe895 TB |
5314 | gfc_free_expr (expr1); |
5315 | gfc_free_expr (expr2); | |
8c6a85e3 | 5316 | return m; |
6de9cd9a DN |
5317 | } |
5318 | ||
5319 | ||
8c6a85e3 | 5320 | /* Match a CASE statement. */ |
6de9cd9a DN |
5321 | |
5322 | match | |
8c6a85e3 | 5323 | gfc_match_case (void) |
6de9cd9a | 5324 | { |
8c6a85e3 | 5325 | gfc_case *c, *head, *tail; |
6de9cd9a DN |
5326 | match m; |
5327 | ||
8c6a85e3 TB |
5328 | head = tail = NULL; |
5329 | ||
5330 | if (gfc_current_state () != COMP_SELECT) | |
6de9cd9a | 5331 | { |
8c6a85e3 | 5332 | gfc_error ("Unexpected CASE statement at %C"); |
6de9cd9a DN |
5333 | return MATCH_ERROR; |
5334 | } | |
5335 | ||
8c6a85e3 | 5336 | if (gfc_match ("% default") == MATCH_YES) |
6de9cd9a | 5337 | { |
8c6a85e3 | 5338 | m = match_case_eos (); |
6de9cd9a DN |
5339 | if (m == MATCH_NO) |
5340 | goto syntax; | |
5341 | if (m == MATCH_ERROR) | |
8c6a85e3 | 5342 | goto cleanup; |
6de9cd9a | 5343 | |
8c6a85e3 TB |
5344 | new_st.op = EXEC_SELECT; |
5345 | c = gfc_get_case (); | |
5346 | c->where = gfc_current_locus; | |
5347 | new_st.ext.block.case_list = c; | |
5348 | return MATCH_YES; | |
6de9cd9a DN |
5349 | } |
5350 | ||
8c6a85e3 TB |
5351 | if (gfc_match_char ('(') != MATCH_YES) |
5352 | goto syntax; | |
5353 | ||
5354 | for (;;) | |
690af379 | 5355 | { |
8c6a85e3 | 5356 | if (match_case_selector (&c) == MATCH_ERROR) |
6de9cd9a DN |
5357 | goto cleanup; |
5358 | ||
8c6a85e3 TB |
5359 | if (head == NULL) |
5360 | head = c; | |
5361 | else | |
5362 | tail->next = c; | |
6de9cd9a | 5363 | |
8c6a85e3 TB |
5364 | tail = c; |
5365 | ||
5366 | if (gfc_match_char (')') == MATCH_YES) | |
5367 | break; | |
5368 | if (gfc_match_char (',') != MATCH_YES) | |
5369 | goto syntax; | |
6de9cd9a DN |
5370 | } |
5371 | ||
8c6a85e3 TB |
5372 | m = match_case_eos (); |
5373 | if (m == MATCH_NO) | |
5374 | goto syntax; | |
5375 | if (m == MATCH_ERROR) | |
5376 | goto cleanup; | |
5377 | ||
5378 | new_st.op = EXEC_SELECT; | |
5379 | new_st.ext.block.case_list = head; | |
5380 | ||
6de9cd9a DN |
5381 | return MATCH_YES; |
5382 | ||
5383 | syntax: | |
8c6a85e3 | 5384 | gfc_error ("Syntax error in CASE specification at %C"); |
6de9cd9a DN |
5385 | |
5386 | cleanup: | |
8c6a85e3 | 5387 | gfc_free_case_list (head); /* new_st is cleaned up in parse.c. */ |
6de9cd9a DN |
5388 | return MATCH_ERROR; |
5389 | } | |
5390 | ||
5391 | ||
8c6a85e3 | 5392 | /* Match a TYPE IS statement. */ |
6de9cd9a | 5393 | |
8c6a85e3 TB |
5394 | match |
5395 | gfc_match_type_is (void) | |
6de9cd9a | 5396 | { |
8c6a85e3 TB |
5397 | gfc_case *c = NULL; |
5398 | match m; | |
6de9cd9a | 5399 | |
8c6a85e3 | 5400 | if (gfc_current_state () != COMP_SELECT_TYPE) |
6de9cd9a | 5401 | { |
8c6a85e3 TB |
5402 | gfc_error ("Unexpected TYPE IS statement at %C"); |
5403 | return MATCH_ERROR; | |
6de9cd9a | 5404 | } |
6de9cd9a | 5405 | |
8c6a85e3 TB |
5406 | if (gfc_match_char ('(') != MATCH_YES) |
5407 | goto syntax; | |
6de9cd9a | 5408 | |
8c6a85e3 TB |
5409 | c = gfc_get_case (); |
5410 | c->where = gfc_current_locus; | |
6de9cd9a | 5411 | |
894460a7 | 5412 | if (gfc_match_type_spec (&c->ts) == MATCH_ERROR) |
6de9cd9a DN |
5413 | goto cleanup; |
5414 | ||
8c6a85e3 | 5415 | if (gfc_match_char (')') != MATCH_YES) |
6de9cd9a DN |
5416 | goto syntax; |
5417 | ||
8c6a85e3 | 5418 | m = match_case_eos (); |
6de9cd9a DN |
5419 | if (m == MATCH_NO) |
5420 | goto syntax; | |
5421 | if (m == MATCH_ERROR) | |
5422 | goto cleanup; | |
5423 | ||
8c6a85e3 TB |
5424 | new_st.op = EXEC_SELECT_TYPE; |
5425 | new_st.ext.block.case_list = c; | |
6de9cd9a | 5426 | |
8b704316 PT |
5427 | if (c->ts.type == BT_DERIVED && c->ts.u.derived |
5428 | && (c->ts.u.derived->attr.sequence | |
5429 | || c->ts.u.derived->attr.is_bind_c)) | |
5430 | { | |
5431 | gfc_error ("The type-spec shall not specify a sequence derived " | |
5432 | "type or a type with the BIND attribute in SELECT " | |
5433 | "TYPE at %C [F2003:C815]"); | |
5434 | return MATCH_ERROR; | |
5435 | } | |
5436 | ||
8c6a85e3 TB |
5437 | /* Create temporary variable. */ |
5438 | select_type_set_tmp (&c->ts); | |
31708dc6 | 5439 | |
6de9cd9a DN |
5440 | return MATCH_YES; |
5441 | ||
5442 | syntax: | |
8c6a85e3 | 5443 | gfc_error ("Syntax error in TYPE IS specification at %C"); |
6de9cd9a DN |
5444 | |
5445 | cleanup: | |
8c6a85e3 TB |
5446 | if (c != NULL) |
5447 | gfc_free_case_list (c); /* new_st is cleaned up in parse.c. */ | |
5448 | return MATCH_ERROR; | |
5449 | } | |
d68bd5a8 | 5450 | |
c874ae73 | 5451 | |
8c6a85e3 TB |
5452 | /* Match a CLASS IS or CLASS DEFAULT statement. */ |
5453 | ||
5454 | match | |
5455 | gfc_match_class_is (void) | |
5456 | { | |
5457 | gfc_case *c = NULL; | |
5458 | match m; | |
5459 | ||
5460 | if (gfc_current_state () != COMP_SELECT_TYPE) | |
5461 | return MATCH_NO; | |
5462 | ||
5463 | if (gfc_match ("% default") == MATCH_YES) | |
5464 | { | |
5465 | m = match_case_eos (); | |
6de9cd9a DN |
5466 | if (m == MATCH_NO) |
5467 | goto syntax; | |
5468 | if (m == MATCH_ERROR) | |
5469 | goto cleanup; | |
5470 | ||
8c6a85e3 TB |
5471 | new_st.op = EXEC_SELECT_TYPE; |
5472 | c = gfc_get_case (); | |
5473 | c->where = gfc_current_locus; | |
5474 | c->ts.type = BT_UNKNOWN; | |
5475 | new_st.ext.block.case_list = c; | |
5476 | select_type_set_tmp (NULL); | |
5477 | return MATCH_YES; | |
6de9cd9a DN |
5478 | } |
5479 | ||
8c6a85e3 TB |
5480 | m = gfc_match ("% is"); |
5481 | if (m == MATCH_NO) | |
6de9cd9a | 5482 | goto syntax; |
8c6a85e3 TB |
5483 | if (m == MATCH_ERROR) |
5484 | goto cleanup; | |
5485 | ||
5486 | if (gfc_match_char ('(') != MATCH_YES) | |
5487 | goto syntax; | |
5488 | ||
5489 | c = gfc_get_case (); | |
5490 | c->where = gfc_current_locus; | |
5491 | ||
5492 | if (match_derived_type_spec (&c->ts) == MATCH_ERROR) | |
5493 | goto cleanup; | |
5494 | ||
5495 | if (c->ts.type == BT_DERIVED) | |
5496 | c->ts.type = BT_CLASS; | |
5497 | ||
5498 | if (gfc_match_char (')') != MATCH_YES) | |
5499 | goto syntax; | |
5500 | ||
5501 | m = match_case_eos (); | |
5502 | if (m == MATCH_NO) | |
5503 | goto syntax; | |
5504 | if (m == MATCH_ERROR) | |
5505 | goto cleanup; | |
5506 | ||
5507 | new_st.op = EXEC_SELECT_TYPE; | |
5508 | new_st.ext.block.case_list = c; | |
8b704316 | 5509 | |
8c6a85e3 TB |
5510 | /* Create temporary variable. */ |
5511 | select_type_set_tmp (&c->ts); | |
6de9cd9a | 5512 | |
c874ae73 TS |
5513 | return MATCH_YES; |
5514 | ||
5515 | syntax: | |
8c6a85e3 | 5516 | gfc_error ("Syntax error in CLASS IS specification at %C"); |
c874ae73 TS |
5517 | |
5518 | cleanup: | |
8c6a85e3 TB |
5519 | if (c != NULL) |
5520 | gfc_free_case_list (c); /* new_st is cleaned up in parse.c. */ | |
c874ae73 TS |
5521 | return MATCH_ERROR; |
5522 | } | |
5523 | ||
8c6a85e3 TB |
5524 | |
5525 | /********************* WHERE subroutines ********************/ | |
5526 | ||
8b704316 | 5527 | /* Match the rest of a simple WHERE statement that follows an IF statement. |
8c6a85e3 | 5528 | */ |
c874ae73 TS |
5529 | |
5530 | static match | |
8c6a85e3 | 5531 | match_simple_where (void) |
c874ae73 | 5532 | { |
8c6a85e3 | 5533 | gfc_expr *expr; |
c874ae73 TS |
5534 | gfc_code *c; |
5535 | match m; | |
5536 | ||
8c6a85e3 | 5537 | m = gfc_match (" ( %e )", &expr); |
c874ae73 | 5538 | if (m != MATCH_YES) |
8c6a85e3 | 5539 | return m; |
c874ae73 TS |
5540 | |
5541 | m = gfc_match_assignment (); | |
8c6a85e3 TB |
5542 | if (m == MATCH_NO) |
5543 | goto syntax; | |
c874ae73 TS |
5544 | if (m == MATCH_ERROR) |
5545 | goto cleanup; | |
c874ae73 TS |
5546 | |
5547 | if (gfc_match_eos () != MATCH_YES) | |
5548 | goto syntax; | |
5549 | ||
11e5274a | 5550 | c = gfc_get_code (EXEC_WHERE); |
8c6a85e3 | 5551 | c->expr1 = expr; |
8c6a85e3 | 5552 | |
11e5274a | 5553 | c->next = XCNEW (gfc_code); |
8c6a85e3 | 5554 | *c->next = new_st; |
c874ae73 | 5555 | gfc_clear_new_st (); |
c874ae73 | 5556 | |
8c6a85e3 TB |
5557 | new_st.op = EXEC_WHERE; |
5558 | new_st.block = c; | |
c874ae73 TS |
5559 | |
5560 | return MATCH_YES; | |
5561 | ||
5562 | syntax: | |
8c6a85e3 | 5563 | gfc_syntax_error (ST_WHERE); |
c874ae73 TS |
5564 | |
5565 | cleanup: | |
8c6a85e3 | 5566 | gfc_free_expr (expr); |
c874ae73 TS |
5567 | return MATCH_ERROR; |
5568 | } | |
5569 | ||
5570 | ||
8c6a85e3 | 5571 | /* Match a WHERE statement. */ |
c874ae73 TS |
5572 | |
5573 | match | |
8c6a85e3 | 5574 | gfc_match_where (gfc_statement *st) |
c874ae73 | 5575 | { |
8c6a85e3 | 5576 | gfc_expr *expr; |
c874ae73 | 5577 | match m0, m; |
8c6a85e3 | 5578 | gfc_code *c; |
c874ae73 TS |
5579 | |
5580 | m0 = gfc_match_label (); | |
5581 | if (m0 == MATCH_ERROR) | |
8c6a85e3 | 5582 | return m0; |
c874ae73 | 5583 | |
8c6a85e3 | 5584 | m = gfc_match (" where ( %e )", &expr); |
c874ae73 TS |
5585 | if (m != MATCH_YES) |
5586 | return m; | |
5587 | ||
6de9cd9a DN |
5588 | if (gfc_match_eos () == MATCH_YES) |
5589 | { | |
8c6a85e3 TB |
5590 | *st = ST_WHERE_BLOCK; |
5591 | new_st.op = EXEC_WHERE; | |
5592 | new_st.expr1 = expr; | |
6de9cd9a DN |
5593 | return MATCH_YES; |
5594 | } | |
5595 | ||
5596 | m = gfc_match_assignment (); | |
6de9cd9a | 5597 | if (m == MATCH_NO) |
8c6a85e3 TB |
5598 | gfc_syntax_error (ST_WHERE); |
5599 | ||
5600 | if (m != MATCH_YES) | |
6de9cd9a | 5601 | { |
8c6a85e3 TB |
5602 | gfc_free_expr (expr); |
5603 | return MATCH_ERROR; | |
6de9cd9a DN |
5604 | } |
5605 | ||
8c6a85e3 TB |
5606 | /* We've got a simple WHERE statement. */ |
5607 | *st = ST_WHERE; | |
11e5274a | 5608 | c = gfc_get_code (EXEC_WHERE); |
8c6a85e3 | 5609 | c->expr1 = expr; |
8c6a85e3 | 5610 | |
11e5274a | 5611 | c->next = XCNEW (gfc_code); |
8c6a85e3 | 5612 | *c->next = new_st; |
6de9cd9a | 5613 | gfc_clear_new_st (); |
6de9cd9a | 5614 | |
8c6a85e3 TB |
5615 | new_st.op = EXEC_WHERE; |
5616 | new_st.block = c; | |
5617 | ||
5618 | return MATCH_YES; | |
5619 | } | |
5620 | ||
5621 | ||
5622 | /* Match an ELSEWHERE statement. We leave behind a WHERE node in | |
5623 | new_st if successful. */ | |
5624 | ||
5625 | match | |
5626 | gfc_match_elsewhere (void) | |
5627 | { | |
5628 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5629 | gfc_expr *expr; | |
5630 | match m; | |
5631 | ||
5632 | if (gfc_current_state () != COMP_WHERE) | |
5633 | { | |
5634 | gfc_error ("ELSEWHERE statement at %C not enclosed in WHERE block"); | |
5635 | return MATCH_ERROR; | |
5636 | } | |
5637 | ||
5638 | expr = NULL; | |
5639 | ||
5640 | if (gfc_match_char ('(') == MATCH_YES) | |
5641 | { | |
5642 | m = gfc_match_expr (&expr); | |
5643 | if (m == MATCH_NO) | |
5644 | goto syntax; | |
5645 | if (m == MATCH_ERROR) | |
5646 | return MATCH_ERROR; | |
5647 | ||
5648 | if (gfc_match_char (')') != MATCH_YES) | |
5649 | goto syntax; | |
5650 | } | |
5651 | ||
5652 | if (gfc_match_eos () != MATCH_YES) | |
5653 | { | |
5654 | /* Only makes sense if we have a where-construct-name. */ | |
5655 | if (!gfc_current_block ()) | |
5656 | { | |
5657 | m = MATCH_ERROR; | |
5658 | goto cleanup; | |
5659 | } | |
5660 | /* Better be a name at this point. */ | |
5661 | m = gfc_match_name (name); | |
5662 | if (m == MATCH_NO) | |
5663 | goto syntax; | |
5664 | if (m == MATCH_ERROR) | |
5665 | goto cleanup; | |
5666 | ||
5667 | if (gfc_match_eos () != MATCH_YES) | |
5668 | goto syntax; | |
5669 | ||
5670 | if (strcmp (name, gfc_current_block ()->name) != 0) | |
5671 | { | |
5672 | gfc_error ("Label '%s' at %C doesn't match WHERE label '%s'", | |
5673 | name, gfc_current_block ()->name); | |
5674 | goto cleanup; | |
5675 | } | |
5676 | } | |
5677 | ||
5678 | new_st.op = EXEC_WHERE; | |
5679 | new_st.expr1 = expr; | |
6de9cd9a DN |
5680 | return MATCH_YES; |
5681 | ||
5682 | syntax: | |
8c6a85e3 | 5683 | gfc_syntax_error (ST_ELSEWHERE); |
6de9cd9a DN |
5684 | |
5685 | cleanup: | |
8c6a85e3 TB |
5686 | gfc_free_expr (expr); |
5687 | return MATCH_ERROR; | |
6de9cd9a | 5688 | } |