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6de9cd9a | 1 | /* Matching subroutines in all sizes, shapes and colors. |
5624e564 | 2 | Copyright (C) 2000-2015 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" | |
40e23961 | 28 | #include "alias.h" |
62603fae | 29 | #include "tree.h" |
d8a2d370 | 30 | #include "stringpool.h" |
6de9cd9a | 31 | |
837c4b78 | 32 | int gfc_matching_ptr_assignment = 0; |
8fb74da4 | 33 | int gfc_matching_procptr_assignment = 0; |
3df684e2 | 34 | bool gfc_matching_prefix = false; |
6de9cd9a | 35 | |
7431bf06 JW |
36 | /* Stack of SELECT TYPE statements. */ |
37 | gfc_select_type_stack *select_type_stack = NULL; | |
cf2b3c22 | 38 | |
ba3ba492 RS |
39 | /* For debugging and diagnostic purposes. Return the textual representation |
40 | of the intrinsic operator OP. */ | |
41 | const char * | |
42 | gfc_op2string (gfc_intrinsic_op op) | |
43 | { | |
44 | switch (op) | |
45 | { | |
46 | case INTRINSIC_UPLUS: | |
47 | case INTRINSIC_PLUS: | |
48 | return "+"; | |
49 | ||
50 | case INTRINSIC_UMINUS: | |
51 | case INTRINSIC_MINUS: | |
52 | return "-"; | |
53 | ||
54 | case INTRINSIC_POWER: | |
55 | return "**"; | |
56 | case INTRINSIC_CONCAT: | |
57 | return "//"; | |
58 | case INTRINSIC_TIMES: | |
59 | return "*"; | |
60 | case INTRINSIC_DIVIDE: | |
61 | return "/"; | |
62 | ||
63 | case INTRINSIC_AND: | |
64 | return ".and."; | |
65 | case INTRINSIC_OR: | |
66 | return ".or."; | |
67 | case INTRINSIC_EQV: | |
68 | return ".eqv."; | |
69 | case INTRINSIC_NEQV: | |
70 | return ".neqv."; | |
71 | ||
72 | case INTRINSIC_EQ_OS: | |
73 | return ".eq."; | |
74 | case INTRINSIC_EQ: | |
75 | return "=="; | |
76 | case INTRINSIC_NE_OS: | |
77 | return ".ne."; | |
78 | case INTRINSIC_NE: | |
79 | return "/="; | |
80 | case INTRINSIC_GE_OS: | |
81 | return ".ge."; | |
82 | case INTRINSIC_GE: | |
83 | return ">="; | |
84 | case INTRINSIC_LE_OS: | |
85 | return ".le."; | |
86 | case INTRINSIC_LE: | |
87 | return "<="; | |
88 | case INTRINSIC_LT_OS: | |
89 | return ".lt."; | |
90 | case INTRINSIC_LT: | |
91 | return "<"; | |
92 | case INTRINSIC_GT_OS: | |
93 | return ".gt."; | |
94 | case INTRINSIC_GT: | |
95 | return ">"; | |
96 | case INTRINSIC_NOT: | |
97 | return ".not."; | |
98 | ||
99 | case INTRINSIC_ASSIGN: | |
100 | return "="; | |
101 | ||
102 | case INTRINSIC_PARENTHESES: | |
103 | return "parens"; | |
104 | ||
898344a9 SK |
105 | case INTRINSIC_NONE: |
106 | return "none"; | |
107 | ||
ba3ba492 RS |
108 | default: |
109 | break; | |
110 | } | |
111 | ||
112 | gfc_internal_error ("gfc_op2string(): Bad code"); | |
113 | /* Not reached. */ | |
114 | } | |
115 | ||
6de9cd9a DN |
116 | |
117 | /******************** Generic matching subroutines ************************/ | |
118 | ||
f9b9fb82 JD |
119 | /* This function scans the current statement counting the opened and closed |
120 | parenthesis to make sure they are balanced. */ | |
121 | ||
122 | match | |
123 | gfc_match_parens (void) | |
124 | { | |
125 | locus old_loc, where; | |
696abb30 JD |
126 | int count; |
127 | gfc_instring instring; | |
8fc541d3 | 128 | gfc_char_t c, quote; |
f9b9fb82 JD |
129 | |
130 | old_loc = gfc_current_locus; | |
131 | count = 0; | |
696abb30 | 132 | instring = NONSTRING; |
f9b9fb82 JD |
133 | quote = ' '; |
134 | ||
135 | for (;;) | |
136 | { | |
137 | c = gfc_next_char_literal (instring); | |
138 | if (c == '\n') | |
139 | break; | |
140 | if (quote == ' ' && ((c == '\'') || (c == '"'))) | |
141 | { | |
8fc541d3 | 142 | quote = c; |
696abb30 | 143 | instring = INSTRING_WARN; |
f9b9fb82 JD |
144 | continue; |
145 | } | |
146 | if (quote != ' ' && c == quote) | |
147 | { | |
148 | quote = ' '; | |
696abb30 | 149 | instring = NONSTRING; |
f9b9fb82 JD |
150 | continue; |
151 | } | |
152 | ||
153 | if (c == '(' && quote == ' ') | |
154 | { | |
155 | count++; | |
156 | where = gfc_current_locus; | |
157 | } | |
158 | if (c == ')' && quote == ' ') | |
159 | { | |
160 | count--; | |
161 | where = gfc_current_locus; | |
162 | } | |
163 | } | |
164 | ||
165 | gfc_current_locus = old_loc; | |
166 | ||
167 | if (count > 0) | |
168 | { | |
a4d9b221 | 169 | gfc_error ("Missing %<)%> in statement at or before %L", &where); |
f9b9fb82 JD |
170 | return MATCH_ERROR; |
171 | } | |
172 | if (count < 0) | |
173 | { | |
a4d9b221 | 174 | gfc_error ("Missing %<(%> in statement at or before %L", &where); |
f9b9fb82 JD |
175 | return MATCH_ERROR; |
176 | } | |
177 | ||
178 | return MATCH_YES; | |
179 | } | |
180 | ||
181 | ||
a88a266c SK |
182 | /* See if the next character is a special character that has |
183 | escaped by a \ via the -fbackslash option. */ | |
184 | ||
185 | match | |
8fc541d3 | 186 | gfc_match_special_char (gfc_char_t *res) |
a88a266c | 187 | { |
8fc541d3 FXC |
188 | int len, i; |
189 | gfc_char_t c, n; | |
a88a266c SK |
190 | match m; |
191 | ||
192 | m = MATCH_YES; | |
193 | ||
696abb30 | 194 | switch ((c = gfc_next_char_literal (INSTRING_WARN))) |
a88a266c SK |
195 | { |
196 | case 'a': | |
8fc541d3 | 197 | *res = '\a'; |
a88a266c SK |
198 | break; |
199 | case 'b': | |
8fc541d3 | 200 | *res = '\b'; |
a88a266c SK |
201 | break; |
202 | case 't': | |
8fc541d3 | 203 | *res = '\t'; |
a88a266c SK |
204 | break; |
205 | case 'f': | |
8fc541d3 | 206 | *res = '\f'; |
a88a266c SK |
207 | break; |
208 | case 'n': | |
8fc541d3 | 209 | *res = '\n'; |
a88a266c SK |
210 | break; |
211 | case 'r': | |
8fc541d3 | 212 | *res = '\r'; |
a88a266c SK |
213 | break; |
214 | case 'v': | |
8fc541d3 | 215 | *res = '\v'; |
a88a266c SK |
216 | break; |
217 | case '\\': | |
8fc541d3 | 218 | *res = '\\'; |
a88a266c SK |
219 | break; |
220 | case '0': | |
8fc541d3 FXC |
221 | *res = '\0'; |
222 | break; | |
223 | ||
224 | case 'x': | |
225 | case 'u': | |
226 | case 'U': | |
227 | /* Hexadecimal form of wide characters. */ | |
228 | len = (c == 'x' ? 2 : (c == 'u' ? 4 : 8)); | |
229 | n = 0; | |
230 | for (i = 0; i < len; i++) | |
231 | { | |
232 | char buf[2] = { '\0', '\0' }; | |
233 | ||
696abb30 | 234 | c = gfc_next_char_literal (INSTRING_WARN); |
8fc541d3 FXC |
235 | if (!gfc_wide_fits_in_byte (c) |
236 | || !gfc_check_digit ((unsigned char) c, 16)) | |
237 | return MATCH_NO; | |
238 | ||
239 | buf[0] = (unsigned char) c; | |
240 | n = n << 4; | |
241 | n += strtol (buf, NULL, 16); | |
242 | } | |
243 | *res = n; | |
a88a266c | 244 | break; |
8fc541d3 | 245 | |
a88a266c SK |
246 | default: |
247 | /* Unknown backslash codes are simply not expanded. */ | |
248 | m = MATCH_NO; | |
249 | break; | |
250 | } | |
251 | ||
252 | return m; | |
253 | } | |
254 | ||
255 | ||
6de9cd9a DN |
256 | /* In free form, match at least one space. Always matches in fixed |
257 | form. */ | |
258 | ||
259 | match | |
260 | gfc_match_space (void) | |
261 | { | |
262 | locus old_loc; | |
8fc541d3 | 263 | char c; |
6de9cd9a | 264 | |
d4fa05b9 | 265 | if (gfc_current_form == FORM_FIXED) |
6de9cd9a DN |
266 | return MATCH_YES; |
267 | ||
63645982 | 268 | old_loc = gfc_current_locus; |
6de9cd9a | 269 | |
8fc541d3 | 270 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
271 | if (!gfc_is_whitespace (c)) |
272 | { | |
63645982 | 273 | gfc_current_locus = old_loc; |
6de9cd9a DN |
274 | return MATCH_NO; |
275 | } | |
276 | ||
277 | gfc_gobble_whitespace (); | |
278 | ||
279 | return MATCH_YES; | |
280 | } | |
281 | ||
282 | ||
283 | /* Match an end of statement. End of statement is optional | |
284 | whitespace, followed by a ';' or '\n' or comment '!'. If a | |
285 | semicolon is found, we continue to eat whitespace and semicolons. */ | |
286 | ||
287 | match | |
288 | gfc_match_eos (void) | |
289 | { | |
290 | locus old_loc; | |
8fc541d3 FXC |
291 | int flag; |
292 | char c; | |
6de9cd9a DN |
293 | |
294 | flag = 0; | |
295 | ||
296 | for (;;) | |
297 | { | |
63645982 | 298 | old_loc = gfc_current_locus; |
6de9cd9a DN |
299 | gfc_gobble_whitespace (); |
300 | ||
8fc541d3 | 301 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
302 | switch (c) |
303 | { | |
304 | case '!': | |
305 | do | |
306 | { | |
8fc541d3 | 307 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
308 | } |
309 | while (c != '\n'); | |
310 | ||
66e4ab31 | 311 | /* Fall through. */ |
6de9cd9a DN |
312 | |
313 | case '\n': | |
314 | return MATCH_YES; | |
315 | ||
316 | case ';': | |
317 | flag = 1; | |
318 | continue; | |
319 | } | |
320 | ||
321 | break; | |
322 | } | |
323 | ||
63645982 | 324 | gfc_current_locus = old_loc; |
6de9cd9a DN |
325 | return (flag) ? MATCH_YES : MATCH_NO; |
326 | } | |
327 | ||
328 | ||
329 | /* Match a literal integer on the input, setting the value on | |
330 | MATCH_YES. Literal ints occur in kind-parameters as well as | |
5cf54585 TS |
331 | old-style character length specifications. If cnt is non-NULL it |
332 | will be set to the number of digits. */ | |
6de9cd9a DN |
333 | |
334 | match | |
8a8f7eca | 335 | gfc_match_small_literal_int (int *value, int *cnt) |
6de9cd9a DN |
336 | { |
337 | locus old_loc; | |
338 | char c; | |
8a8f7eca | 339 | int i, j; |
6de9cd9a | 340 | |
63645982 | 341 | old_loc = gfc_current_locus; |
6de9cd9a | 342 | |
8fc541d3 | 343 | *value = -1; |
6de9cd9a | 344 | gfc_gobble_whitespace (); |
8fc541d3 | 345 | c = gfc_next_ascii_char (); |
5cf54585 TS |
346 | if (cnt) |
347 | *cnt = 0; | |
6de9cd9a DN |
348 | |
349 | if (!ISDIGIT (c)) | |
350 | { | |
63645982 | 351 | gfc_current_locus = old_loc; |
6de9cd9a DN |
352 | return MATCH_NO; |
353 | } | |
354 | ||
355 | i = c - '0'; | |
8a8f7eca | 356 | j = 1; |
6de9cd9a DN |
357 | |
358 | for (;;) | |
359 | { | |
63645982 | 360 | old_loc = gfc_current_locus; |
8fc541d3 | 361 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
362 | |
363 | if (!ISDIGIT (c)) | |
364 | break; | |
365 | ||
366 | i = 10 * i + c - '0'; | |
8a8f7eca | 367 | j++; |
6de9cd9a DN |
368 | |
369 | if (i > 99999999) | |
370 | { | |
371 | gfc_error ("Integer too large at %C"); | |
372 | return MATCH_ERROR; | |
373 | } | |
374 | } | |
375 | ||
63645982 | 376 | gfc_current_locus = old_loc; |
6de9cd9a DN |
377 | |
378 | *value = i; | |
5cf54585 TS |
379 | if (cnt) |
380 | *cnt = j; | |
6de9cd9a DN |
381 | return MATCH_YES; |
382 | } | |
383 | ||
384 | ||
385 | /* Match a small, constant integer expression, like in a kind | |
386 | statement. On MATCH_YES, 'value' is set. */ | |
387 | ||
388 | match | |
389 | gfc_match_small_int (int *value) | |
390 | { | |
391 | gfc_expr *expr; | |
392 | const char *p; | |
393 | match m; | |
394 | int i; | |
395 | ||
396 | m = gfc_match_expr (&expr); | |
397 | if (m != MATCH_YES) | |
398 | return m; | |
399 | ||
400 | p = gfc_extract_int (expr, &i); | |
401 | gfc_free_expr (expr); | |
402 | ||
403 | if (p != NULL) | |
404 | { | |
405 | gfc_error (p); | |
406 | m = MATCH_ERROR; | |
407 | } | |
408 | ||
409 | *value = i; | |
410 | return m; | |
411 | } | |
412 | ||
413 | ||
a8b3b0b6 CR |
414 | /* This function is the same as the gfc_match_small_int, except that |
415 | we're keeping the pointer to the expr. This function could just be | |
416 | removed and the previously mentioned one modified, though all calls | |
417 | to it would have to be modified then (and there were a number of | |
418 | them). Return MATCH_ERROR if fail to extract the int; otherwise, | |
419 | return the result of gfc_match_expr(). The expr (if any) that was | |
420 | matched is returned in the parameter expr. */ | |
421 | ||
422 | match | |
423 | gfc_match_small_int_expr (int *value, gfc_expr **expr) | |
424 | { | |
425 | const char *p; | |
426 | match m; | |
427 | int i; | |
428 | ||
429 | m = gfc_match_expr (expr); | |
430 | if (m != MATCH_YES) | |
431 | return m; | |
432 | ||
433 | p = gfc_extract_int (*expr, &i); | |
434 | ||
435 | if (p != NULL) | |
436 | { | |
437 | gfc_error (p); | |
438 | m = MATCH_ERROR; | |
439 | } | |
440 | ||
441 | *value = i; | |
442 | return m; | |
443 | } | |
444 | ||
445 | ||
6de9cd9a DN |
446 | /* Matches a statement label. Uses gfc_match_small_literal_int() to |
447 | do most of the work. */ | |
448 | ||
449 | match | |
b251af97 | 450 | gfc_match_st_label (gfc_st_label **label) |
6de9cd9a DN |
451 | { |
452 | locus old_loc; | |
453 | match m; | |
8a8f7eca | 454 | int i, cnt; |
6de9cd9a | 455 | |
63645982 | 456 | old_loc = gfc_current_locus; |
6de9cd9a | 457 | |
8a8f7eca | 458 | m = gfc_match_small_literal_int (&i, &cnt); |
6de9cd9a DN |
459 | if (m != MATCH_YES) |
460 | return m; | |
461 | ||
8a8f7eca | 462 | if (cnt > 5) |
6de9cd9a | 463 | { |
8a8f7eca SK |
464 | gfc_error ("Too many digits in statement label at %C"); |
465 | goto cleanup; | |
6de9cd9a DN |
466 | } |
467 | ||
a34a91f0 | 468 | if (i == 0) |
8a8f7eca SK |
469 | { |
470 | gfc_error ("Statement label at %C is zero"); | |
471 | goto cleanup; | |
472 | } | |
473 | ||
474 | *label = gfc_get_st_label (i); | |
475 | return MATCH_YES; | |
476 | ||
477 | cleanup: | |
478 | ||
63645982 | 479 | gfc_current_locus = old_loc; |
6de9cd9a DN |
480 | return MATCH_ERROR; |
481 | } | |
482 | ||
483 | ||
484 | /* Match and validate a label associated with a named IF, DO or SELECT | |
485 | statement. If the symbol does not have the label attribute, we add | |
486 | it. We also make sure the symbol does not refer to another | |
487 | (active) block. A matched label is pointed to by gfc_new_block. */ | |
488 | ||
489 | match | |
490 | gfc_match_label (void) | |
491 | { | |
492 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6de9cd9a DN |
493 | match m; |
494 | ||
495 | gfc_new_block = NULL; | |
496 | ||
497 | m = gfc_match (" %n :", name); | |
498 | if (m != MATCH_YES) | |
499 | return m; | |
500 | ||
501 | if (gfc_get_symbol (name, NULL, &gfc_new_block)) | |
502 | { | |
a4d9b221 | 503 | gfc_error ("Label name %qs at %C is ambiguous", name); |
6de9cd9a DN |
504 | return MATCH_ERROR; |
505 | } | |
506 | ||
cb1d4dce SK |
507 | if (gfc_new_block->attr.flavor == FL_LABEL) |
508 | { | |
a4d9b221 | 509 | gfc_error ("Duplicate construct label %qs at %C", name); |
cb1d4dce SK |
510 | return MATCH_ERROR; |
511 | } | |
6de9cd9a | 512 | |
524af0d6 JB |
513 | if (!gfc_add_flavor (&gfc_new_block->attr, FL_LABEL, |
514 | gfc_new_block->name, NULL)) | |
cb1d4dce | 515 | return MATCH_ERROR; |
6de9cd9a DN |
516 | |
517 | return MATCH_YES; | |
518 | } | |
519 | ||
520 | ||
6de9cd9a | 521 | /* See if the current input looks like a name of some sort. Modifies |
090021e9 BM |
522 | the passed buffer which must be GFC_MAX_SYMBOL_LEN+1 bytes long. |
523 | Note that options.c restricts max_identifier_length to not more | |
524 | than GFC_MAX_SYMBOL_LEN. */ | |
6de9cd9a DN |
525 | |
526 | match | |
527 | gfc_match_name (char *buffer) | |
528 | { | |
529 | locus old_loc; | |
8fc541d3 FXC |
530 | int i; |
531 | char c; | |
6de9cd9a | 532 | |
63645982 | 533 | old_loc = gfc_current_locus; |
6de9cd9a DN |
534 | gfc_gobble_whitespace (); |
535 | ||
8fc541d3 | 536 | c = gfc_next_ascii_char (); |
c61819ff | 537 | if (!(ISALPHA (c) || (c == '_' && flag_allow_leading_underscore))) |
6de9cd9a | 538 | { |
83eb71f4 SK |
539 | /* Special cases for unary minus and plus, which allows for a sensible |
540 | error message for code of the form 'c = exp(-a*b) )' where an | |
541 | extra ')' appears at the end of statement. */ | |
542 | if (!gfc_error_flag_test () && c != '(' && c != '-' && c != '+') | |
b251af97 | 543 | gfc_error ("Invalid character in name at %C"); |
63645982 | 544 | gfc_current_locus = old_loc; |
6de9cd9a DN |
545 | return MATCH_NO; |
546 | } | |
547 | ||
548 | i = 0; | |
549 | ||
550 | do | |
551 | { | |
552 | buffer[i++] = c; | |
553 | ||
554 | if (i > gfc_option.max_identifier_length) | |
555 | { | |
556 | gfc_error ("Name at %C is too long"); | |
557 | return MATCH_ERROR; | |
558 | } | |
559 | ||
63645982 | 560 | old_loc = gfc_current_locus; |
8fc541d3 | 561 | c = gfc_next_ascii_char (); |
6de9cd9a | 562 | } |
c61819ff | 563 | while (ISALNUM (c) || c == '_' || (flag_dollar_ok && c == '$')); |
6de9cd9a | 564 | |
c61819ff | 565 | if (c == '$' && !flag_dollar_ok) |
89a5afda | 566 | { |
29e0597e TB |
567 | gfc_fatal_error ("Invalid character %<$%> at %L. Use %<-fdollar-ok%> to " |
568 | "allow it as an extension", &old_loc); | |
89a5afda TB |
569 | return MATCH_ERROR; |
570 | } | |
571 | ||
6de9cd9a | 572 | buffer[i] = '\0'; |
63645982 | 573 | gfc_current_locus = old_loc; |
6de9cd9a DN |
574 | |
575 | return MATCH_YES; | |
576 | } | |
577 | ||
578 | ||
579 | /* Match a symbol on the input. Modifies the pointer to the symbol | |
580 | pointer if successful. */ | |
581 | ||
582 | match | |
b251af97 | 583 | gfc_match_sym_tree (gfc_symtree **matched_symbol, int host_assoc) |
6de9cd9a DN |
584 | { |
585 | char buffer[GFC_MAX_SYMBOL_LEN + 1]; | |
586 | match m; | |
587 | ||
588 | m = gfc_match_name (buffer); | |
589 | if (m != MATCH_YES) | |
590 | return m; | |
591 | ||
592 | if (host_assoc) | |
593 | return (gfc_get_ha_sym_tree (buffer, matched_symbol)) | |
66e4ab31 | 594 | ? MATCH_ERROR : MATCH_YES; |
6de9cd9a | 595 | |
08a6b8e0 | 596 | if (gfc_get_sym_tree (buffer, NULL, matched_symbol, false)) |
6de9cd9a DN |
597 | return MATCH_ERROR; |
598 | ||
599 | return MATCH_YES; | |
600 | } | |
601 | ||
602 | ||
603 | match | |
b251af97 | 604 | gfc_match_symbol (gfc_symbol **matched_symbol, int host_assoc) |
6de9cd9a DN |
605 | { |
606 | gfc_symtree *st; | |
607 | match m; | |
608 | ||
609 | m = gfc_match_sym_tree (&st, host_assoc); | |
610 | ||
611 | if (m == MATCH_YES) | |
612 | { | |
613 | if (st) | |
b251af97 | 614 | *matched_symbol = st->n.sym; |
6de9cd9a | 615 | else |
b251af97 | 616 | *matched_symbol = NULL; |
6de9cd9a | 617 | } |
32cafd73 MH |
618 | else |
619 | *matched_symbol = NULL; | |
6de9cd9a DN |
620 | return m; |
621 | } | |
622 | ||
b251af97 | 623 | |
8b704316 PT |
624 | /* Match an intrinsic operator. Returns an INTRINSIC enum. While matching, |
625 | we always find INTRINSIC_PLUS before INTRINSIC_UPLUS. We work around this | |
6de9cd9a DN |
626 | in matchexp.c. */ |
627 | ||
628 | match | |
b251af97 | 629 | gfc_match_intrinsic_op (gfc_intrinsic_op *result) |
6de9cd9a | 630 | { |
f4d8e0d1 | 631 | locus orig_loc = gfc_current_locus; |
8fc541d3 | 632 | char ch; |
6de9cd9a | 633 | |
f4d8e0d1 | 634 | gfc_gobble_whitespace (); |
8fc541d3 | 635 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
636 | switch (ch) |
637 | { | |
638 | case '+': | |
639 | /* Matched "+". */ | |
640 | *result = INTRINSIC_PLUS; | |
641 | return MATCH_YES; | |
6de9cd9a | 642 | |
f4d8e0d1 RS |
643 | case '-': |
644 | /* Matched "-". */ | |
645 | *result = INTRINSIC_MINUS; | |
646 | return MATCH_YES; | |
6de9cd9a | 647 | |
f4d8e0d1 | 648 | case '=': |
8fc541d3 | 649 | if (gfc_next_ascii_char () == '=') |
f4d8e0d1 RS |
650 | { |
651 | /* Matched "==". */ | |
652 | *result = INTRINSIC_EQ; | |
653 | return MATCH_YES; | |
654 | } | |
655 | break; | |
656 | ||
657 | case '<': | |
8fc541d3 | 658 | if (gfc_peek_ascii_char () == '=') |
f4d8e0d1 RS |
659 | { |
660 | /* Matched "<=". */ | |
8fc541d3 | 661 | gfc_next_ascii_char (); |
f4d8e0d1 RS |
662 | *result = INTRINSIC_LE; |
663 | return MATCH_YES; | |
664 | } | |
665 | /* Matched "<". */ | |
666 | *result = INTRINSIC_LT; | |
667 | return MATCH_YES; | |
668 | ||
669 | case '>': | |
8fc541d3 | 670 | if (gfc_peek_ascii_char () == '=') |
f4d8e0d1 RS |
671 | { |
672 | /* Matched ">=". */ | |
8fc541d3 | 673 | gfc_next_ascii_char (); |
f4d8e0d1 RS |
674 | *result = INTRINSIC_GE; |
675 | return MATCH_YES; | |
676 | } | |
677 | /* Matched ">". */ | |
678 | *result = INTRINSIC_GT; | |
679 | return MATCH_YES; | |
680 | ||
681 | case '*': | |
8fc541d3 | 682 | if (gfc_peek_ascii_char () == '*') |
f4d8e0d1 RS |
683 | { |
684 | /* Matched "**". */ | |
8fc541d3 | 685 | gfc_next_ascii_char (); |
f4d8e0d1 RS |
686 | *result = INTRINSIC_POWER; |
687 | return MATCH_YES; | |
688 | } | |
689 | /* Matched "*". */ | |
690 | *result = INTRINSIC_TIMES; | |
691 | return MATCH_YES; | |
692 | ||
693 | case '/': | |
8fc541d3 | 694 | ch = gfc_peek_ascii_char (); |
f4d8e0d1 RS |
695 | if (ch == '=') |
696 | { | |
697 | /* Matched "/=". */ | |
8fc541d3 | 698 | gfc_next_ascii_char (); |
f4d8e0d1 RS |
699 | *result = INTRINSIC_NE; |
700 | return MATCH_YES; | |
701 | } | |
702 | else if (ch == '/') | |
703 | { | |
704 | /* Matched "//". */ | |
8fc541d3 | 705 | gfc_next_ascii_char (); |
f4d8e0d1 RS |
706 | *result = INTRINSIC_CONCAT; |
707 | return MATCH_YES; | |
708 | } | |
709 | /* Matched "/". */ | |
710 | *result = INTRINSIC_DIVIDE; | |
711 | return MATCH_YES; | |
712 | ||
713 | case '.': | |
8fc541d3 | 714 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
715 | switch (ch) |
716 | { | |
717 | case 'a': | |
8fc541d3 FXC |
718 | if (gfc_next_ascii_char () == 'n' |
719 | && gfc_next_ascii_char () == 'd' | |
720 | && gfc_next_ascii_char () == '.') | |
f4d8e0d1 RS |
721 | { |
722 | /* Matched ".and.". */ | |
723 | *result = INTRINSIC_AND; | |
724 | return MATCH_YES; | |
725 | } | |
726 | break; | |
727 | ||
728 | case 'e': | |
8fc541d3 | 729 | if (gfc_next_ascii_char () == 'q') |
f4d8e0d1 | 730 | { |
8fc541d3 | 731 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
732 | if (ch == '.') |
733 | { | |
734 | /* Matched ".eq.". */ | |
735 | *result = INTRINSIC_EQ_OS; | |
736 | return MATCH_YES; | |
737 | } | |
738 | else if (ch == 'v') | |
739 | { | |
8fc541d3 | 740 | if (gfc_next_ascii_char () == '.') |
f4d8e0d1 RS |
741 | { |
742 | /* Matched ".eqv.". */ | |
743 | *result = INTRINSIC_EQV; | |
744 | return MATCH_YES; | |
745 | } | |
746 | } | |
747 | } | |
748 | break; | |
749 | ||
750 | case 'g': | |
8fc541d3 | 751 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
752 | if (ch == 'e') |
753 | { | |
8fc541d3 | 754 | if (gfc_next_ascii_char () == '.') |
f4d8e0d1 RS |
755 | { |
756 | /* Matched ".ge.". */ | |
757 | *result = INTRINSIC_GE_OS; | |
758 | return MATCH_YES; | |
759 | } | |
760 | } | |
761 | else if (ch == 't') | |
762 | { | |
8fc541d3 | 763 | if (gfc_next_ascii_char () == '.') |
f4d8e0d1 RS |
764 | { |
765 | /* Matched ".gt.". */ | |
766 | *result = INTRINSIC_GT_OS; | |
767 | return MATCH_YES; | |
768 | } | |
769 | } | |
770 | break; | |
771 | ||
772 | case 'l': | |
8fc541d3 | 773 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
774 | if (ch == 'e') |
775 | { | |
8fc541d3 | 776 | if (gfc_next_ascii_char () == '.') |
f4d8e0d1 RS |
777 | { |
778 | /* Matched ".le.". */ | |
779 | *result = INTRINSIC_LE_OS; | |
780 | return MATCH_YES; | |
781 | } | |
782 | } | |
783 | else if (ch == 't') | |
784 | { | |
8fc541d3 | 785 | if (gfc_next_ascii_char () == '.') |
f4d8e0d1 RS |
786 | { |
787 | /* Matched ".lt.". */ | |
788 | *result = INTRINSIC_LT_OS; | |
789 | return MATCH_YES; | |
790 | } | |
791 | } | |
792 | break; | |
793 | ||
794 | case 'n': | |
8fc541d3 | 795 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
796 | if (ch == 'e') |
797 | { | |
8fc541d3 | 798 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
799 | if (ch == '.') |
800 | { | |
801 | /* Matched ".ne.". */ | |
802 | *result = INTRINSIC_NE_OS; | |
803 | return MATCH_YES; | |
804 | } | |
805 | else if (ch == 'q') | |
806 | { | |
8fc541d3 FXC |
807 | if (gfc_next_ascii_char () == 'v' |
808 | && gfc_next_ascii_char () == '.') | |
f4d8e0d1 RS |
809 | { |
810 | /* Matched ".neqv.". */ | |
811 | *result = INTRINSIC_NEQV; | |
812 | return MATCH_YES; | |
813 | } | |
814 | } | |
815 | } | |
816 | else if (ch == 'o') | |
817 | { | |
8fc541d3 FXC |
818 | if (gfc_next_ascii_char () == 't' |
819 | && gfc_next_ascii_char () == '.') | |
f4d8e0d1 RS |
820 | { |
821 | /* Matched ".not.". */ | |
822 | *result = INTRINSIC_NOT; | |
823 | return MATCH_YES; | |
824 | } | |
825 | } | |
826 | break; | |
827 | ||
828 | case 'o': | |
8fc541d3 FXC |
829 | if (gfc_next_ascii_char () == 'r' |
830 | && gfc_next_ascii_char () == '.') | |
f4d8e0d1 RS |
831 | { |
832 | /* Matched ".or.". */ | |
833 | *result = INTRINSIC_OR; | |
834 | return MATCH_YES; | |
835 | } | |
836 | break; | |
837 | ||
838 | default: | |
839 | break; | |
840 | } | |
841 | break; | |
842 | ||
843 | default: | |
844 | break; | |
845 | } | |
846 | ||
847 | gfc_current_locus = orig_loc; | |
848 | return MATCH_NO; | |
6de9cd9a DN |
849 | } |
850 | ||
851 | ||
852 | /* Match a loop control phrase: | |
853 | ||
854 | <LVALUE> = <EXPR>, <EXPR> [, <EXPR> ] | |
855 | ||
856 | If the final integer expression is not present, a constant unity | |
857 | expression is returned. We don't return MATCH_ERROR until after | |
858 | the equals sign is seen. */ | |
859 | ||
860 | match | |
b251af97 | 861 | gfc_match_iterator (gfc_iterator *iter, int init_flag) |
6de9cd9a DN |
862 | { |
863 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
864 | gfc_expr *var, *e1, *e2, *e3; | |
865 | locus start; | |
866 | match m; | |
867 | ||
d3a9eea2 TB |
868 | e1 = e2 = e3 = NULL; |
869 | ||
b251af97 | 870 | /* Match the start of an iterator without affecting the symbol table. */ |
6de9cd9a | 871 | |
63645982 | 872 | start = gfc_current_locus; |
6de9cd9a | 873 | m = gfc_match (" %n =", name); |
63645982 | 874 | gfc_current_locus = start; |
6de9cd9a DN |
875 | |
876 | if (m != MATCH_YES) | |
877 | return MATCH_NO; | |
878 | ||
879 | m = gfc_match_variable (&var, 0); | |
880 | if (m != MATCH_YES) | |
881 | return MATCH_NO; | |
882 | ||
d3a9eea2 TB |
883 | /* F2008, C617 & C565. */ |
884 | if (var->symtree->n.sym->attr.codimension) | |
885 | { | |
886 | gfc_error ("Loop variable at %C cannot be a coarray"); | |
887 | goto cleanup; | |
888 | } | |
6de9cd9a DN |
889 | |
890 | if (var->ref != NULL) | |
891 | { | |
892 | gfc_error ("Loop variable at %C cannot be a sub-component"); | |
893 | goto cleanup; | |
894 | } | |
895 | ||
d3a9eea2 TB |
896 | gfc_match_char ('='); |
897 | ||
9a3db5a3 PT |
898 | var->symtree->n.sym->attr.implied_index = 1; |
899 | ||
6de9cd9a DN |
900 | m = init_flag ? gfc_match_init_expr (&e1) : gfc_match_expr (&e1); |
901 | if (m == MATCH_NO) | |
902 | goto syntax; | |
903 | if (m == MATCH_ERROR) | |
904 | goto cleanup; | |
905 | ||
906 | if (gfc_match_char (',') != MATCH_YES) | |
907 | goto syntax; | |
908 | ||
909 | m = init_flag ? gfc_match_init_expr (&e2) : gfc_match_expr (&e2); | |
910 | if (m == MATCH_NO) | |
911 | goto syntax; | |
912 | if (m == MATCH_ERROR) | |
913 | goto cleanup; | |
914 | ||
915 | if (gfc_match_char (',') != MATCH_YES) | |
916 | { | |
b7e75771 | 917 | e3 = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1); |
6de9cd9a DN |
918 | goto done; |
919 | } | |
920 | ||
921 | m = init_flag ? gfc_match_init_expr (&e3) : gfc_match_expr (&e3); | |
922 | if (m == MATCH_ERROR) | |
923 | goto cleanup; | |
924 | if (m == MATCH_NO) | |
925 | { | |
926 | gfc_error ("Expected a step value in iterator at %C"); | |
927 | goto cleanup; | |
928 | } | |
929 | ||
930 | done: | |
931 | iter->var = var; | |
932 | iter->start = e1; | |
933 | iter->end = e2; | |
934 | iter->step = e3; | |
935 | return MATCH_YES; | |
936 | ||
937 | syntax: | |
938 | gfc_error ("Syntax error in iterator at %C"); | |
939 | ||
940 | cleanup: | |
941 | gfc_free_expr (e1); | |
942 | gfc_free_expr (e2); | |
943 | gfc_free_expr (e3); | |
944 | ||
945 | return MATCH_ERROR; | |
946 | } | |
947 | ||
948 | ||
949 | /* Tries to match the next non-whitespace character on the input. | |
950 | This subroutine does not return MATCH_ERROR. */ | |
951 | ||
952 | match | |
953 | gfc_match_char (char c) | |
954 | { | |
955 | locus where; | |
956 | ||
63645982 | 957 | where = gfc_current_locus; |
6de9cd9a DN |
958 | gfc_gobble_whitespace (); |
959 | ||
8fc541d3 | 960 | if (gfc_next_ascii_char () == c) |
6de9cd9a DN |
961 | return MATCH_YES; |
962 | ||
63645982 | 963 | gfc_current_locus = where; |
6de9cd9a DN |
964 | return MATCH_NO; |
965 | } | |
966 | ||
967 | ||
968 | /* General purpose matching subroutine. The target string is a | |
969 | scanf-like format string in which spaces correspond to arbitrary | |
970 | whitespace (including no whitespace), characters correspond to | |
971 | themselves. The %-codes are: | |
972 | ||
973 | %% Literal percent sign | |
974 | %e Expression, pointer to a pointer is set | |
975 | %s Symbol, pointer to the symbol is set | |
976 | %n Name, character buffer is set to name | |
977 | %t Matches end of statement. | |
978 | %o Matches an intrinsic operator, returned as an INTRINSIC enum. | |
979 | %l Matches a statement label | |
980 | %v Matches a variable expression (an lvalue) | |
981 | % Matches a required space (in free form) and optional spaces. */ | |
982 | ||
983 | match | |
984 | gfc_match (const char *target, ...) | |
985 | { | |
986 | gfc_st_label **label; | |
987 | int matches, *ip; | |
988 | locus old_loc; | |
989 | va_list argp; | |
990 | char c, *np; | |
991 | match m, n; | |
992 | void **vp; | |
993 | const char *p; | |
994 | ||
63645982 | 995 | old_loc = gfc_current_locus; |
6de9cd9a DN |
996 | va_start (argp, target); |
997 | m = MATCH_NO; | |
998 | matches = 0; | |
999 | p = target; | |
1000 | ||
1001 | loop: | |
1002 | c = *p++; | |
1003 | switch (c) | |
1004 | { | |
1005 | case ' ': | |
1006 | gfc_gobble_whitespace (); | |
1007 | goto loop; | |
1008 | case '\0': | |
1009 | m = MATCH_YES; | |
1010 | break; | |
1011 | ||
1012 | case '%': | |
1013 | c = *p++; | |
1014 | switch (c) | |
1015 | { | |
1016 | case 'e': | |
1017 | vp = va_arg (argp, void **); | |
1018 | n = gfc_match_expr ((gfc_expr **) vp); | |
1019 | if (n != MATCH_YES) | |
1020 | { | |
1021 | m = n; | |
1022 | goto not_yes; | |
1023 | } | |
1024 | ||
1025 | matches++; | |
1026 | goto loop; | |
1027 | ||
1028 | case 'v': | |
1029 | vp = va_arg (argp, void **); | |
1030 | n = gfc_match_variable ((gfc_expr **) vp, 0); | |
1031 | if (n != MATCH_YES) | |
1032 | { | |
1033 | m = n; | |
1034 | goto not_yes; | |
1035 | } | |
1036 | ||
1037 | matches++; | |
1038 | goto loop; | |
1039 | ||
1040 | case 's': | |
1041 | vp = va_arg (argp, void **); | |
1042 | n = gfc_match_symbol ((gfc_symbol **) vp, 0); | |
1043 | if (n != MATCH_YES) | |
1044 | { | |
1045 | m = n; | |
1046 | goto not_yes; | |
1047 | } | |
1048 | ||
1049 | matches++; | |
1050 | goto loop; | |
1051 | ||
1052 | case 'n': | |
1053 | np = va_arg (argp, char *); | |
1054 | n = gfc_match_name (np); | |
1055 | if (n != MATCH_YES) | |
1056 | { | |
1057 | m = n; | |
1058 | goto not_yes; | |
1059 | } | |
1060 | ||
1061 | matches++; | |
1062 | goto loop; | |
1063 | ||
1064 | case 'l': | |
1065 | label = va_arg (argp, gfc_st_label **); | |
a34a91f0 | 1066 | n = gfc_match_st_label (label); |
6de9cd9a DN |
1067 | if (n != MATCH_YES) |
1068 | { | |
1069 | m = n; | |
1070 | goto not_yes; | |
1071 | } | |
1072 | ||
1073 | matches++; | |
1074 | goto loop; | |
1075 | ||
1076 | case 'o': | |
1077 | ip = va_arg (argp, int *); | |
1078 | n = gfc_match_intrinsic_op ((gfc_intrinsic_op *) ip); | |
1079 | if (n != MATCH_YES) | |
1080 | { | |
1081 | m = n; | |
1082 | goto not_yes; | |
1083 | } | |
1084 | ||
1085 | matches++; | |
1086 | goto loop; | |
1087 | ||
1088 | case 't': | |
1089 | if (gfc_match_eos () != MATCH_YES) | |
1090 | { | |
1091 | m = MATCH_NO; | |
1092 | goto not_yes; | |
1093 | } | |
1094 | goto loop; | |
1095 | ||
1096 | case ' ': | |
1097 | if (gfc_match_space () == MATCH_YES) | |
1098 | goto loop; | |
1099 | m = MATCH_NO; | |
1100 | goto not_yes; | |
1101 | ||
1102 | case '%': | |
66e4ab31 | 1103 | break; /* Fall through to character matcher. */ |
6de9cd9a DN |
1104 | |
1105 | default: | |
1106 | gfc_internal_error ("gfc_match(): Bad match code %c", c); | |
1107 | } | |
1108 | ||
1109 | default: | |
befdf741 DK |
1110 | |
1111 | /* gfc_next_ascii_char converts characters to lower-case, so we shouldn't | |
1112 | expect an upper case character here! */ | |
1113 | gcc_assert (TOLOWER (c) == c); | |
1114 | ||
8fc541d3 | 1115 | if (c == gfc_next_ascii_char ()) |
6de9cd9a DN |
1116 | goto loop; |
1117 | break; | |
1118 | } | |
1119 | ||
1120 | not_yes: | |
1121 | va_end (argp); | |
1122 | ||
1123 | if (m != MATCH_YES) | |
1124 | { | |
1125 | /* Clean up after a failed match. */ | |
63645982 | 1126 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1127 | va_start (argp, target); |
1128 | ||
1129 | p = target; | |
1130 | for (; matches > 0; matches--) | |
1131 | { | |
1132 | while (*p++ != '%'); | |
1133 | ||
1134 | switch (*p++) | |
1135 | { | |
1136 | case '%': | |
1137 | matches++; | |
66e4ab31 | 1138 | break; /* Skip. */ |
6de9cd9a | 1139 | |
6de9cd9a DN |
1140 | /* Matches that don't have to be undone */ |
1141 | case 'o': | |
1142 | case 'l': | |
1143 | case 'n': | |
1144 | case 's': | |
b251af97 | 1145 | (void) va_arg (argp, void **); |
6de9cd9a DN |
1146 | break; |
1147 | ||
1148 | case 'e': | |
6de9cd9a | 1149 | case 'v': |
6de9cd9a | 1150 | vp = va_arg (argp, void **); |
ece3f663 | 1151 | gfc_free_expr ((struct gfc_expr *)*vp); |
6de9cd9a DN |
1152 | *vp = NULL; |
1153 | break; | |
1154 | } | |
1155 | } | |
1156 | ||
1157 | va_end (argp); | |
1158 | } | |
1159 | ||
1160 | return m; | |
1161 | } | |
1162 | ||
1163 | ||
1164 | /*********************** Statement level matching **********************/ | |
1165 | ||
1166 | /* Matches the start of a program unit, which is the program keyword | |
e08b5a75 | 1167 | followed by an obligatory symbol. */ |
6de9cd9a DN |
1168 | |
1169 | match | |
1170 | gfc_match_program (void) | |
1171 | { | |
1172 | gfc_symbol *sym; | |
1173 | match m; | |
1174 | ||
6de9cd9a DN |
1175 | m = gfc_match ("% %s%t", &sym); |
1176 | ||
1177 | if (m == MATCH_NO) | |
1178 | { | |
1179 | gfc_error ("Invalid form of PROGRAM statement at %C"); | |
1180 | m = MATCH_ERROR; | |
1181 | } | |
1182 | ||
1183 | if (m == MATCH_ERROR) | |
1184 | return m; | |
1185 | ||
524af0d6 | 1186 | if (!gfc_add_flavor (&sym->attr, FL_PROGRAM, sym->name, NULL)) |
6de9cd9a DN |
1187 | return MATCH_ERROR; |
1188 | ||
1189 | gfc_new_block = sym; | |
1190 | ||
1191 | return MATCH_YES; | |
1192 | } | |
1193 | ||
1194 | ||
1195 | /* Match a simple assignment statement. */ | |
1196 | ||
1197 | match | |
1198 | gfc_match_assignment (void) | |
1199 | { | |
1200 | gfc_expr *lvalue, *rvalue; | |
1201 | locus old_loc; | |
1202 | match m; | |
1203 | ||
63645982 | 1204 | old_loc = gfc_current_locus; |
6de9cd9a | 1205 | |
5056a350 | 1206 | lvalue = NULL; |
6de9cd9a DN |
1207 | m = gfc_match (" %v =", &lvalue); |
1208 | if (m != MATCH_YES) | |
c9583ed2 | 1209 | { |
5056a350 SK |
1210 | gfc_current_locus = old_loc; |
1211 | gfc_free_expr (lvalue); | |
1212 | return MATCH_NO; | |
c9583ed2 TS |
1213 | } |
1214 | ||
5056a350 | 1215 | rvalue = NULL; |
6de9cd9a DN |
1216 | m = gfc_match (" %e%t", &rvalue); |
1217 | if (m != MATCH_YES) | |
5056a350 SK |
1218 | { |
1219 | gfc_current_locus = old_loc; | |
1220 | gfc_free_expr (lvalue); | |
1221 | gfc_free_expr (rvalue); | |
1222 | return m; | |
1223 | } | |
6de9cd9a DN |
1224 | |
1225 | gfc_set_sym_referenced (lvalue->symtree->n.sym); | |
1226 | ||
1227 | new_st.op = EXEC_ASSIGN; | |
a513927a | 1228 | new_st.expr1 = lvalue; |
6de9cd9a DN |
1229 | new_st.expr2 = rvalue; |
1230 | ||
c9583ed2 TS |
1231 | gfc_check_do_variable (lvalue->symtree); |
1232 | ||
6de9cd9a | 1233 | return MATCH_YES; |
6de9cd9a DN |
1234 | } |
1235 | ||
1236 | ||
1237 | /* Match a pointer assignment statement. */ | |
1238 | ||
1239 | match | |
1240 | gfc_match_pointer_assignment (void) | |
1241 | { | |
1242 | gfc_expr *lvalue, *rvalue; | |
1243 | locus old_loc; | |
1244 | match m; | |
1245 | ||
63645982 | 1246 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1247 | |
1248 | lvalue = rvalue = NULL; | |
837c4b78 | 1249 | gfc_matching_ptr_assignment = 0; |
8fb74da4 | 1250 | gfc_matching_procptr_assignment = 0; |
6de9cd9a DN |
1251 | |
1252 | m = gfc_match (" %v =>", &lvalue); | |
1253 | if (m != MATCH_YES) | |
1254 | { | |
1255 | m = MATCH_NO; | |
1256 | goto cleanup; | |
1257 | } | |
1258 | ||
713485cc | 1259 | if (lvalue->symtree->n.sym->attr.proc_pointer |
2a573572 | 1260 | || gfc_is_proc_ptr_comp (lvalue)) |
8fb74da4 | 1261 | gfc_matching_procptr_assignment = 1; |
837c4b78 JW |
1262 | else |
1263 | gfc_matching_ptr_assignment = 1; | |
8fb74da4 | 1264 | |
6de9cd9a | 1265 | m = gfc_match (" %e%t", &rvalue); |
837c4b78 | 1266 | gfc_matching_ptr_assignment = 0; |
8fb74da4 | 1267 | gfc_matching_procptr_assignment = 0; |
6de9cd9a DN |
1268 | if (m != MATCH_YES) |
1269 | goto cleanup; | |
1270 | ||
1271 | new_st.op = EXEC_POINTER_ASSIGN; | |
a513927a | 1272 | new_st.expr1 = lvalue; |
6de9cd9a DN |
1273 | new_st.expr2 = rvalue; |
1274 | ||
1275 | return MATCH_YES; | |
1276 | ||
1277 | cleanup: | |
63645982 | 1278 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1279 | gfc_free_expr (lvalue); |
1280 | gfc_free_expr (rvalue); | |
1281 | return m; | |
1282 | } | |
1283 | ||
1284 | ||
43e1c5f7 | 1285 | /* We try to match an easy arithmetic IF statement. This only happens |
835d64ab FXC |
1286 | when just after having encountered a simple IF statement. This code |
1287 | is really duplicate with parts of the gfc_match_if code, but this is | |
1288 | *much* easier. */ | |
b251af97 | 1289 | |
f55e72ce | 1290 | static match |
835d64ab | 1291 | match_arithmetic_if (void) |
43e1c5f7 FXC |
1292 | { |
1293 | gfc_st_label *l1, *l2, *l3; | |
1294 | gfc_expr *expr; | |
1295 | match m; | |
1296 | ||
1297 | m = gfc_match (" ( %e ) %l , %l , %l%t", &expr, &l1, &l2, &l3); | |
1298 | if (m != MATCH_YES) | |
1299 | return m; | |
1300 | ||
524af0d6 JB |
1301 | if (!gfc_reference_st_label (l1, ST_LABEL_TARGET) |
1302 | || !gfc_reference_st_label (l2, ST_LABEL_TARGET) | |
1303 | || !gfc_reference_st_label (l3, ST_LABEL_TARGET)) | |
43e1c5f7 FXC |
1304 | { |
1305 | gfc_free_expr (expr); | |
1306 | return MATCH_ERROR; | |
1307 | } | |
1308 | ||
524af0d6 | 1309 | if (!gfc_notify_std (GFC_STD_F95_OBS, "Arithmetic IF statement at %C")) |
51c3f0f6 FXC |
1310 | return MATCH_ERROR; |
1311 | ||
43e1c5f7 | 1312 | new_st.op = EXEC_ARITHMETIC_IF; |
a513927a | 1313 | new_st.expr1 = expr; |
79bd1948 | 1314 | new_st.label1 = l1; |
43e1c5f7 FXC |
1315 | new_st.label2 = l2; |
1316 | new_st.label3 = l3; | |
1317 | ||
1318 | return MATCH_YES; | |
1319 | } | |
1320 | ||
1321 | ||
6de9cd9a DN |
1322 | /* The IF statement is a bit of a pain. First of all, there are three |
1323 | forms of it, the simple IF, the IF that starts a block and the | |
1324 | arithmetic IF. | |
1325 | ||
1326 | There is a problem with the simple IF and that is the fact that we | |
1327 | only have a single level of undo information on symbols. What this | |
1328 | means is for a simple IF, we must re-match the whole IF statement | |
1329 | multiple times in order to guarantee that the symbol table ends up | |
1330 | in the proper state. */ | |
1331 | ||
c874ae73 TS |
1332 | static match match_simple_forall (void); |
1333 | static match match_simple_where (void); | |
1334 | ||
6de9cd9a | 1335 | match |
b251af97 | 1336 | gfc_match_if (gfc_statement *if_type) |
6de9cd9a DN |
1337 | { |
1338 | gfc_expr *expr; | |
1339 | gfc_st_label *l1, *l2, *l3; | |
f9b9fb82 | 1340 | locus old_loc, old_loc2; |
6de9cd9a DN |
1341 | gfc_code *p; |
1342 | match m, n; | |
1343 | ||
1344 | n = gfc_match_label (); | |
1345 | if (n == MATCH_ERROR) | |
1346 | return n; | |
1347 | ||
63645982 | 1348 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1349 | |
1350 | m = gfc_match (" if ( %e", &expr); | |
1351 | if (m != MATCH_YES) | |
1352 | return m; | |
1353 | ||
f9b9fb82 JD |
1354 | old_loc2 = gfc_current_locus; |
1355 | gfc_current_locus = old_loc; | |
8b704316 | 1356 | |
f9b9fb82 JD |
1357 | if (gfc_match_parens () == MATCH_ERROR) |
1358 | return MATCH_ERROR; | |
1359 | ||
1360 | gfc_current_locus = old_loc2; | |
1361 | ||
6de9cd9a DN |
1362 | if (gfc_match_char (')') != MATCH_YES) |
1363 | { | |
1364 | gfc_error ("Syntax error in IF-expression at %C"); | |
1365 | gfc_free_expr (expr); | |
1366 | return MATCH_ERROR; | |
1367 | } | |
1368 | ||
1369 | m = gfc_match (" %l , %l , %l%t", &l1, &l2, &l3); | |
1370 | ||
1371 | if (m == MATCH_YES) | |
1372 | { | |
1373 | if (n == MATCH_YES) | |
1374 | { | |
b251af97 SK |
1375 | gfc_error ("Block label not appropriate for arithmetic IF " |
1376 | "statement at %C"); | |
6de9cd9a DN |
1377 | gfc_free_expr (expr); |
1378 | return MATCH_ERROR; | |
1379 | } | |
1380 | ||
524af0d6 JB |
1381 | if (!gfc_reference_st_label (l1, ST_LABEL_TARGET) |
1382 | || !gfc_reference_st_label (l2, ST_LABEL_TARGET) | |
1383 | || !gfc_reference_st_label (l3, ST_LABEL_TARGET)) | |
6de9cd9a | 1384 | { |
6de9cd9a DN |
1385 | gfc_free_expr (expr); |
1386 | return MATCH_ERROR; | |
1387 | } | |
8b704316 | 1388 | |
524af0d6 | 1389 | if (!gfc_notify_std (GFC_STD_F95_OBS, "Arithmetic IF statement at %C")) |
b251af97 | 1390 | return MATCH_ERROR; |
6de9cd9a DN |
1391 | |
1392 | new_st.op = EXEC_ARITHMETIC_IF; | |
a513927a | 1393 | new_st.expr1 = expr; |
79bd1948 | 1394 | new_st.label1 = l1; |
6de9cd9a DN |
1395 | new_st.label2 = l2; |
1396 | new_st.label3 = l3; | |
1397 | ||
1398 | *if_type = ST_ARITHMETIC_IF; | |
1399 | return MATCH_YES; | |
1400 | } | |
1401 | ||
172b8799 | 1402 | if (gfc_match (" then%t") == MATCH_YES) |
6de9cd9a DN |
1403 | { |
1404 | new_st.op = EXEC_IF; | |
a513927a | 1405 | new_st.expr1 = expr; |
6de9cd9a DN |
1406 | *if_type = ST_IF_BLOCK; |
1407 | return MATCH_YES; | |
1408 | } | |
1409 | ||
1410 | if (n == MATCH_YES) | |
1411 | { | |
f9b9fb82 | 1412 | gfc_error ("Block label is not appropriate for IF statement at %C"); |
6de9cd9a DN |
1413 | gfc_free_expr (expr); |
1414 | return MATCH_ERROR; | |
1415 | } | |
1416 | ||
1417 | /* At this point the only thing left is a simple IF statement. At | |
1418 | this point, n has to be MATCH_NO, so we don't have to worry about | |
1419 | re-matching a block label. From what we've got so far, try | |
1420 | matching an assignment. */ | |
1421 | ||
1422 | *if_type = ST_SIMPLE_IF; | |
1423 | ||
1424 | m = gfc_match_assignment (); | |
1425 | if (m == MATCH_YES) | |
1426 | goto got_match; | |
1427 | ||
1428 | gfc_free_expr (expr); | |
1429 | gfc_undo_symbols (); | |
63645982 | 1430 | gfc_current_locus = old_loc; |
6de9cd9a | 1431 | |
5056a350 SK |
1432 | /* m can be MATCH_NO or MATCH_ERROR, here. For MATCH_ERROR, a mangled |
1433 | assignment was found. For MATCH_NO, continue to call the various | |
1434 | matchers. */ | |
17bbca74 SK |
1435 | if (m == MATCH_ERROR) |
1436 | return MATCH_ERROR; | |
1437 | ||
66e4ab31 | 1438 | gfc_match (" if ( %e ) ", &expr); /* Guaranteed to match. */ |
6de9cd9a DN |
1439 | |
1440 | m = gfc_match_pointer_assignment (); | |
1441 | if (m == MATCH_YES) | |
1442 | goto got_match; | |
1443 | ||
1444 | gfc_free_expr (expr); | |
1445 | gfc_undo_symbols (); | |
63645982 | 1446 | gfc_current_locus = old_loc; |
6de9cd9a | 1447 | |
66e4ab31 | 1448 | gfc_match (" if ( %e ) ", &expr); /* Guaranteed to match. */ |
6de9cd9a DN |
1449 | |
1450 | /* Look at the next keyword to see which matcher to call. Matching | |
1451 | the keyword doesn't affect the symbol table, so we don't have to | |
1452 | restore between tries. */ | |
1453 | ||
1454 | #define match(string, subr, statement) \ | |
524af0d6 | 1455 | if (gfc_match (string) == MATCH_YES) { m = subr(); goto got_match; } |
6de9cd9a DN |
1456 | |
1457 | gfc_clear_error (); | |
1458 | ||
1459 | match ("allocate", gfc_match_allocate, ST_ALLOCATE) | |
5056a350 SK |
1460 | match ("assign", gfc_match_assign, ST_LABEL_ASSIGNMENT) |
1461 | match ("backspace", gfc_match_backspace, ST_BACKSPACE) | |
1462 | match ("call", gfc_match_call, ST_CALL) | |
1463 | match ("close", gfc_match_close, ST_CLOSE) | |
1464 | match ("continue", gfc_match_continue, ST_CONTINUE) | |
1465 | match ("cycle", gfc_match_cycle, ST_CYCLE) | |
1466 | match ("deallocate", gfc_match_deallocate, ST_DEALLOCATE) | |
1467 | match ("end file", gfc_match_endfile, ST_END_FILE) | |
d0a4a61c | 1468 | match ("error stop", gfc_match_error_stop, ST_ERROR_STOP) |
5056a350 SK |
1469 | match ("exit", gfc_match_exit, ST_EXIT) |
1470 | match ("flush", gfc_match_flush, ST_FLUSH) | |
1471 | match ("forall", match_simple_forall, ST_FORALL) | |
1472 | match ("go to", gfc_match_goto, ST_GOTO) | |
1473 | match ("if", match_arithmetic_if, ST_ARITHMETIC_IF) | |
1474 | match ("inquire", gfc_match_inquire, ST_INQUIRE) | |
5493aa17 | 1475 | match ("lock", gfc_match_lock, ST_LOCK) |
5056a350 SK |
1476 | match ("nullify", gfc_match_nullify, ST_NULLIFY) |
1477 | match ("open", gfc_match_open, ST_OPEN) | |
1478 | match ("pause", gfc_match_pause, ST_NONE) | |
1479 | match ("print", gfc_match_print, ST_WRITE) | |
1480 | match ("read", gfc_match_read, ST_READ) | |
1481 | match ("return", gfc_match_return, ST_RETURN) | |
1482 | match ("rewind", gfc_match_rewind, ST_REWIND) | |
1483 | match ("stop", gfc_match_stop, ST_STOP) | |
6f0f0b2e | 1484 | match ("wait", gfc_match_wait, ST_WAIT) |
d0a4a61c TB |
1485 | match ("sync all", gfc_match_sync_all, ST_SYNC_CALL); |
1486 | match ("sync images", gfc_match_sync_images, ST_SYNC_IMAGES); | |
1487 | match ("sync memory", gfc_match_sync_memory, ST_SYNC_MEMORY); | |
5493aa17 | 1488 | match ("unlock", gfc_match_unlock, ST_UNLOCK) |
5056a350 SK |
1489 | match ("where", match_simple_where, ST_WHERE) |
1490 | match ("write", gfc_match_write, ST_WRITE) | |
1491 | ||
1492 | /* The gfc_match_assignment() above may have returned a MATCH_NO | |
8b704316 | 1493 | where the assignment was to a named constant. Check that |
5056a350 SK |
1494 | special case here. */ |
1495 | m = gfc_match_assignment (); | |
1496 | if (m == MATCH_NO) | |
1497 | { | |
1498 | gfc_error ("Cannot assign to a named constant at %C"); | |
1499 | gfc_free_expr (expr); | |
1500 | gfc_undo_symbols (); | |
1501 | gfc_current_locus = old_loc; | |
1502 | return MATCH_ERROR; | |
1503 | } | |
6de9cd9a DN |
1504 | |
1505 | /* All else has failed, so give up. See if any of the matchers has | |
1506 | stored an error message of some sort. */ | |
b5a9fd3e | 1507 | if (!gfc_error_check ()) |
6de9cd9a DN |
1508 | gfc_error ("Unclassifiable statement in IF-clause at %C"); |
1509 | ||
1510 | gfc_free_expr (expr); | |
1511 | return MATCH_ERROR; | |
1512 | ||
1513 | got_match: | |
1514 | if (m == MATCH_NO) | |
1515 | gfc_error ("Syntax error in IF-clause at %C"); | |
1516 | if (m != MATCH_YES) | |
1517 | { | |
1518 | gfc_free_expr (expr); | |
1519 | return MATCH_ERROR; | |
1520 | } | |
1521 | ||
1522 | /* At this point, we've matched the single IF and the action clause | |
1523 | is in new_st. Rearrange things so that the IF statement appears | |
1524 | in new_st. */ | |
1525 | ||
11e5274a JW |
1526 | p = gfc_get_code (EXEC_IF); |
1527 | p->next = XCNEW (gfc_code); | |
6de9cd9a | 1528 | *p->next = new_st; |
63645982 | 1529 | p->next->loc = gfc_current_locus; |
6de9cd9a | 1530 | |
a513927a | 1531 | p->expr1 = expr; |
6de9cd9a DN |
1532 | |
1533 | gfc_clear_new_st (); | |
1534 | ||
1535 | new_st.op = EXEC_IF; | |
1536 | new_st.block = p; | |
1537 | ||
1538 | return MATCH_YES; | |
1539 | } | |
1540 | ||
1541 | #undef match | |
1542 | ||
1543 | ||
1544 | /* Match an ELSE statement. */ | |
1545 | ||
1546 | match | |
1547 | gfc_match_else (void) | |
1548 | { | |
1549 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1550 | ||
1551 | if (gfc_match_eos () == MATCH_YES) | |
1552 | return MATCH_YES; | |
1553 | ||
1554 | if (gfc_match_name (name) != MATCH_YES | |
1555 | || gfc_current_block () == NULL | |
1556 | || gfc_match_eos () != MATCH_YES) | |
1557 | { | |
1558 | gfc_error ("Unexpected junk after ELSE statement at %C"); | |
1559 | return MATCH_ERROR; | |
1560 | } | |
1561 | ||
1562 | if (strcmp (name, gfc_current_block ()->name) != 0) | |
1563 | { | |
a4d9b221 | 1564 | gfc_error ("Label %qs at %C doesn't match IF label %qs", |
6de9cd9a DN |
1565 | name, gfc_current_block ()->name); |
1566 | return MATCH_ERROR; | |
1567 | } | |
1568 | ||
1569 | return MATCH_YES; | |
1570 | } | |
1571 | ||
1572 | ||
1573 | /* Match an ELSE IF statement. */ | |
1574 | ||
1575 | match | |
1576 | gfc_match_elseif (void) | |
1577 | { | |
1578 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1579 | gfc_expr *expr; | |
1580 | match m; | |
1581 | ||
1582 | m = gfc_match (" ( %e ) then", &expr); | |
1583 | if (m != MATCH_YES) | |
1584 | return m; | |
1585 | ||
1586 | if (gfc_match_eos () == MATCH_YES) | |
1587 | goto done; | |
1588 | ||
1589 | if (gfc_match_name (name) != MATCH_YES | |
1590 | || gfc_current_block () == NULL | |
1591 | || gfc_match_eos () != MATCH_YES) | |
1592 | { | |
1593 | gfc_error ("Unexpected junk after ELSE IF statement at %C"); | |
1594 | goto cleanup; | |
1595 | } | |
1596 | ||
1597 | if (strcmp (name, gfc_current_block ()->name) != 0) | |
1598 | { | |
a4d9b221 | 1599 | gfc_error ("Label %qs at %C doesn't match IF label %qs", |
6de9cd9a DN |
1600 | name, gfc_current_block ()->name); |
1601 | goto cleanup; | |
1602 | } | |
1603 | ||
1604 | done: | |
1605 | new_st.op = EXEC_IF; | |
a513927a | 1606 | new_st.expr1 = expr; |
6de9cd9a DN |
1607 | return MATCH_YES; |
1608 | ||
1609 | cleanup: | |
1610 | gfc_free_expr (expr); | |
1611 | return MATCH_ERROR; | |
1612 | } | |
1613 | ||
1614 | ||
1615 | /* Free a gfc_iterator structure. */ | |
1616 | ||
1617 | void | |
b251af97 | 1618 | gfc_free_iterator (gfc_iterator *iter, int flag) |
6de9cd9a | 1619 | { |
66e4ab31 | 1620 | |
6de9cd9a DN |
1621 | if (iter == NULL) |
1622 | return; | |
1623 | ||
1624 | gfc_free_expr (iter->var); | |
1625 | gfc_free_expr (iter->start); | |
1626 | gfc_free_expr (iter->end); | |
1627 | gfc_free_expr (iter->step); | |
1628 | ||
1629 | if (flag) | |
cede9502 | 1630 | free (iter); |
6de9cd9a DN |
1631 | } |
1632 | ||
1633 | ||
d0a4a61c TB |
1634 | /* Match a CRITICAL statement. */ |
1635 | match | |
1636 | gfc_match_critical (void) | |
1637 | { | |
1638 | gfc_st_label *label = NULL; | |
1639 | ||
1640 | if (gfc_match_label () == MATCH_ERROR) | |
1641 | return MATCH_ERROR; | |
1642 | ||
1643 | if (gfc_match (" critical") != MATCH_YES) | |
1644 | return MATCH_NO; | |
1645 | ||
1646 | if (gfc_match_st_label (&label) == MATCH_ERROR) | |
1647 | return MATCH_ERROR; | |
1648 | ||
1649 | if (gfc_match_eos () != MATCH_YES) | |
1650 | { | |
1651 | gfc_syntax_error (ST_CRITICAL); | |
1652 | return MATCH_ERROR; | |
1653 | } | |
1654 | ||
1655 | if (gfc_pure (NULL)) | |
1656 | { | |
1657 | gfc_error ("Image control statement CRITICAL at %C in PURE procedure"); | |
1658 | return MATCH_ERROR; | |
1659 | } | |
1660 | ||
524af0d6 | 1661 | if (gfc_find_state (COMP_DO_CONCURRENT)) |
8c6a85e3 TB |
1662 | { |
1663 | gfc_error ("Image control statement CRITICAL at %C in DO CONCURRENT " | |
1664 | "block"); | |
1665 | return MATCH_ERROR; | |
1666 | } | |
1667 | ||
ccd7751b | 1668 | gfc_unset_implicit_pure (NULL); |
f1f39033 | 1669 | |
524af0d6 | 1670 | if (!gfc_notify_std (GFC_STD_F2008, "CRITICAL statement at %C")) |
d0a4a61c TB |
1671 | return MATCH_ERROR; |
1672 | ||
f19626cf | 1673 | if (flag_coarray == GFC_FCOARRAY_NONE) |
f4d1d50a | 1674 | { |
ddc05d11 TB |
1675 | gfc_fatal_error ("Coarrays disabled at %C, use %<-fcoarray=%> to " |
1676 | "enable"); | |
f4d1d50a TB |
1677 | return MATCH_ERROR; |
1678 | } | |
1679 | ||
524af0d6 | 1680 | if (gfc_find_state (COMP_CRITICAL)) |
d0a4a61c TB |
1681 | { |
1682 | gfc_error ("Nested CRITICAL block at %C"); | |
1683 | return MATCH_ERROR; | |
1684 | } | |
1685 | ||
1686 | new_st.op = EXEC_CRITICAL; | |
1687 | ||
1688 | if (label != NULL | |
524af0d6 | 1689 | && !gfc_reference_st_label (label, ST_LABEL_TARGET)) |
d0a4a61c TB |
1690 | return MATCH_ERROR; |
1691 | ||
1692 | return MATCH_YES; | |
1693 | } | |
1694 | ||
1695 | ||
9abe5e56 DK |
1696 | /* Match a BLOCK statement. */ |
1697 | ||
1698 | match | |
1699 | gfc_match_block (void) | |
1700 | { | |
1701 | match m; | |
1702 | ||
1703 | if (gfc_match_label () == MATCH_ERROR) | |
1704 | return MATCH_ERROR; | |
1705 | ||
1706 | if (gfc_match (" block") != MATCH_YES) | |
1707 | return MATCH_NO; | |
1708 | ||
1709 | /* For this to be a correct BLOCK statement, the line must end now. */ | |
1710 | m = gfc_match_eos (); | |
1711 | if (m == MATCH_ERROR) | |
1712 | return MATCH_ERROR; | |
1713 | if (m == MATCH_NO) | |
1714 | return MATCH_NO; | |
1715 | ||
1716 | return MATCH_YES; | |
1717 | } | |
1718 | ||
1719 | ||
03af1e4c DK |
1720 | /* Match an ASSOCIATE statement. */ |
1721 | ||
1722 | match | |
1723 | gfc_match_associate (void) | |
1724 | { | |
1725 | if (gfc_match_label () == MATCH_ERROR) | |
1726 | return MATCH_ERROR; | |
1727 | ||
1728 | if (gfc_match (" associate") != MATCH_YES) | |
1729 | return MATCH_NO; | |
1730 | ||
1731 | /* Match the association list. */ | |
1732 | if (gfc_match_char ('(') != MATCH_YES) | |
1733 | { | |
1734 | gfc_error ("Expected association list at %C"); | |
1735 | return MATCH_ERROR; | |
1736 | } | |
1737 | new_st.ext.block.assoc = NULL; | |
1738 | while (true) | |
1739 | { | |
1740 | gfc_association_list* newAssoc = gfc_get_association_list (); | |
1741 | gfc_association_list* a; | |
1742 | ||
1743 | /* Match the next association. */ | |
1744 | if (gfc_match (" %n => %e", newAssoc->name, &newAssoc->target) | |
1745 | != MATCH_YES) | |
1746 | { | |
1747 | gfc_error ("Expected association at %C"); | |
1748 | goto assocListError; | |
1749 | } | |
571d54de | 1750 | newAssoc->where = gfc_current_locus; |
03af1e4c DK |
1751 | |
1752 | /* Check that the current name is not yet in the list. */ | |
1753 | for (a = new_st.ext.block.assoc; a; a = a->next) | |
1754 | if (!strcmp (a->name, newAssoc->name)) | |
1755 | { | |
a4d9b221 | 1756 | gfc_error ("Duplicate name %qs in association at %C", |
03af1e4c DK |
1757 | newAssoc->name); |
1758 | goto assocListError; | |
1759 | } | |
1760 | ||
1761 | /* The target expression must not be coindexed. */ | |
1762 | if (gfc_is_coindexed (newAssoc->target)) | |
1763 | { | |
1764 | gfc_error ("Association target at %C must not be coindexed"); | |
1765 | goto assocListError; | |
1766 | } | |
1767 | ||
571d54de DK |
1768 | /* The `variable' field is left blank for now; because the target is not |
1769 | yet resolved, we can't use gfc_has_vector_subscript to determine it | |
8c91ab34 | 1770 | for now. This is set during resolution. */ |
03af1e4c DK |
1771 | |
1772 | /* Put it into the list. */ | |
1773 | newAssoc->next = new_st.ext.block.assoc; | |
1774 | new_st.ext.block.assoc = newAssoc; | |
1775 | ||
1776 | /* Try next one or end if closing parenthesis is found. */ | |
1777 | gfc_gobble_whitespace (); | |
1778 | if (gfc_peek_char () == ')') | |
1779 | break; | |
1780 | if (gfc_match_char (',') != MATCH_YES) | |
1781 | { | |
a4d9b221 | 1782 | gfc_error ("Expected %<)%> or %<,%> at %C"); |
03af1e4c DK |
1783 | return MATCH_ERROR; |
1784 | } | |
1785 | ||
1786 | continue; | |
1787 | ||
1788 | assocListError: | |
cede9502 | 1789 | free (newAssoc); |
03af1e4c DK |
1790 | goto error; |
1791 | } | |
1792 | if (gfc_match_char (')') != MATCH_YES) | |
1793 | { | |
1794 | /* This should never happen as we peek above. */ | |
1795 | gcc_unreachable (); | |
1796 | } | |
1797 | ||
1798 | if (gfc_match_eos () != MATCH_YES) | |
1799 | { | |
1800 | gfc_error ("Junk after ASSOCIATE statement at %C"); | |
1801 | goto error; | |
1802 | } | |
1803 | ||
1804 | return MATCH_YES; | |
1805 | ||
1806 | error: | |
1807 | gfc_free_association_list (new_st.ext.block.assoc); | |
1808 | return MATCH_ERROR; | |
1809 | } | |
1810 | ||
1811 | ||
8c6a85e3 TB |
1812 | /* Match a Fortran 2003 derived-type-spec (F03:R455), which is just the name of |
1813 | an accessible derived type. */ | |
6de9cd9a | 1814 | |
8c6a85e3 TB |
1815 | static match |
1816 | match_derived_type_spec (gfc_typespec *ts) | |
6de9cd9a | 1817 | { |
8c6a85e3 | 1818 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
8b704316 | 1819 | locus old_locus; |
8c6a85e3 | 1820 | gfc_symbol *derived; |
6de9cd9a | 1821 | |
8c6a85e3 | 1822 | old_locus = gfc_current_locus; |
6de9cd9a | 1823 | |
8c6a85e3 TB |
1824 | if (gfc_match ("%n", name) != MATCH_YES) |
1825 | { | |
1826 | gfc_current_locus = old_locus; | |
1827 | return MATCH_NO; | |
1828 | } | |
6de9cd9a | 1829 | |
8c6a85e3 | 1830 | gfc_find_symbol (name, NULL, 1, &derived); |
6de9cd9a | 1831 | |
c3f34952 TB |
1832 | if (derived && derived->attr.flavor == FL_PROCEDURE && derived->attr.generic) |
1833 | derived = gfc_find_dt_in_generic (derived); | |
1834 | ||
8c6a85e3 TB |
1835 | if (derived && derived->attr.flavor == FL_DERIVED) |
1836 | { | |
1837 | ts->type = BT_DERIVED; | |
1838 | ts->u.derived = derived; | |
1839 | return MATCH_YES; | |
1840 | } | |
6de9cd9a | 1841 | |
8b704316 | 1842 | gfc_current_locus = old_locus; |
8c6a85e3 TB |
1843 | return MATCH_NO; |
1844 | } | |
9b089e05 | 1845 | |
6de9cd9a | 1846 | |
8c6a85e3 TB |
1847 | /* Match a Fortran 2003 type-spec (F03:R401). This is similar to |
1848 | gfc_match_decl_type_spec() from decl.c, with the following exceptions: | |
1849 | It only includes the intrinsic types from the Fortran 2003 standard | |
1850 | (thus, neither BYTE nor forms like REAL*4 are allowed). Additionally, | |
1851 | the implicit_flag is not needed, so it was removed. Derived types are | |
1852 | identified by their name alone. */ | |
1853 | ||
894460a7 TB |
1854 | match |
1855 | gfc_match_type_spec (gfc_typespec *ts) | |
8c6a85e3 TB |
1856 | { |
1857 | match m; | |
1858 | locus old_locus; | |
1859 | ||
1860 | gfc_clear_ts (ts); | |
1861 | gfc_gobble_whitespace (); | |
1862 | old_locus = gfc_current_locus; | |
1863 | ||
1864 | if (match_derived_type_spec (ts) == MATCH_YES) | |
6de9cd9a | 1865 | { |
8c6a85e3 TB |
1866 | /* Enforce F03:C401. */ |
1867 | if (ts->u.derived->attr.abstract) | |
1868 | { | |
a4d9b221 | 1869 | gfc_error ("Derived type %qs at %L may not be ABSTRACT", |
8c6a85e3 TB |
1870 | ts->u.derived->name, &old_locus); |
1871 | return MATCH_ERROR; | |
1872 | } | |
1873 | return MATCH_YES; | |
6de9cd9a DN |
1874 | } |
1875 | ||
8c6a85e3 TB |
1876 | if (gfc_match ("integer") == MATCH_YES) |
1877 | { | |
1878 | ts->type = BT_INTEGER; | |
1879 | ts->kind = gfc_default_integer_kind; | |
1880 | goto kind_selector; | |
1881 | } | |
6de9cd9a | 1882 | |
8c6a85e3 TB |
1883 | if (gfc_match ("real") == MATCH_YES) |
1884 | { | |
1885 | ts->type = BT_REAL; | |
1886 | ts->kind = gfc_default_real_kind; | |
1887 | goto kind_selector; | |
1888 | } | |
acb388a0 | 1889 | |
8c6a85e3 | 1890 | if (gfc_match ("double precision") == MATCH_YES) |
6de9cd9a | 1891 | { |
8c6a85e3 TB |
1892 | ts->type = BT_REAL; |
1893 | ts->kind = gfc_default_double_kind; | |
1894 | return MATCH_YES; | |
6de9cd9a DN |
1895 | } |
1896 | ||
8c6a85e3 TB |
1897 | if (gfc_match ("complex") == MATCH_YES) |
1898 | { | |
1899 | ts->type = BT_COMPLEX; | |
1900 | ts->kind = gfc_default_complex_kind; | |
1901 | goto kind_selector; | |
1902 | } | |
6de9cd9a | 1903 | |
8c6a85e3 TB |
1904 | if (gfc_match ("character") == MATCH_YES) |
1905 | { | |
1906 | ts->type = BT_CHARACTER; | |
6de9cd9a | 1907 | |
8c6a85e3 | 1908 | m = gfc_match_char_spec (ts); |
6de9cd9a | 1909 | |
8c6a85e3 TB |
1910 | if (m == MATCH_NO) |
1911 | m = MATCH_YES; | |
6de9cd9a | 1912 | |
8c6a85e3 TB |
1913 | return m; |
1914 | } | |
c9583ed2 | 1915 | |
8c6a85e3 | 1916 | if (gfc_match ("logical") == MATCH_YES) |
6de9cd9a | 1917 | { |
8c6a85e3 TB |
1918 | ts->type = BT_LOGICAL; |
1919 | ts->kind = gfc_default_logical_kind; | |
1920 | goto kind_selector; | |
6de9cd9a DN |
1921 | } |
1922 | ||
8c6a85e3 TB |
1923 | /* If a type is not matched, simply return MATCH_NO. */ |
1924 | gfc_current_locus = old_locus; | |
1925 | return MATCH_NO; | |
6de9cd9a | 1926 | |
8c6a85e3 | 1927 | kind_selector: |
6de9cd9a | 1928 | |
8c6a85e3 TB |
1929 | gfc_gobble_whitespace (); |
1930 | if (gfc_peek_ascii_char () == '*') | |
6de9cd9a | 1931 | { |
8c6a85e3 TB |
1932 | gfc_error ("Invalid type-spec at %C"); |
1933 | return MATCH_ERROR; | |
6de9cd9a DN |
1934 | } |
1935 | ||
8c6a85e3 | 1936 | m = gfc_match_kind_spec (ts, false); |
6de9cd9a | 1937 | |
8c6a85e3 TB |
1938 | if (m == MATCH_NO) |
1939 | m = MATCH_YES; /* No kind specifier found. */ | |
6de9cd9a | 1940 | |
8c6a85e3 | 1941 | return m; |
6de9cd9a DN |
1942 | } |
1943 | ||
1944 | ||
8c6a85e3 | 1945 | /******************** FORALL subroutines ********************/ |
6de9cd9a | 1946 | |
8c6a85e3 TB |
1947 | /* Free a list of FORALL iterators. */ |
1948 | ||
1949 | void | |
1950 | gfc_free_forall_iterator (gfc_forall_iterator *iter) | |
6de9cd9a | 1951 | { |
8c6a85e3 | 1952 | gfc_forall_iterator *next; |
6de9cd9a | 1953 | |
8c6a85e3 | 1954 | while (iter) |
6de9cd9a | 1955 | { |
8c6a85e3 TB |
1956 | next = iter->next; |
1957 | gfc_free_expr (iter->var); | |
1958 | gfc_free_expr (iter->start); | |
1959 | gfc_free_expr (iter->end); | |
1960 | gfc_free_expr (iter->stride); | |
1961 | free (iter); | |
1962 | iter = next; | |
1963 | } | |
1964 | } | |
61b644c2 | 1965 | |
6de9cd9a | 1966 | |
8c6a85e3 | 1967 | /* Match an iterator as part of a FORALL statement. The format is: |
61b644c2 | 1968 | |
8c6a85e3 | 1969 | <var> = <start>:<end>[:<stride>] |
6de9cd9a | 1970 | |
8c6a85e3 TB |
1971 | On MATCH_NO, the caller tests for the possibility that there is a |
1972 | scalar mask expression. */ | |
6de9cd9a | 1973 | |
8c6a85e3 TB |
1974 | static match |
1975 | match_forall_iterator (gfc_forall_iterator **result) | |
1976 | { | |
1977 | gfc_forall_iterator *iter; | |
1978 | locus where; | |
1979 | match m; | |
6de9cd9a | 1980 | |
8c6a85e3 TB |
1981 | where = gfc_current_locus; |
1982 | iter = XCNEW (gfc_forall_iterator); | |
6de9cd9a | 1983 | |
8c6a85e3 TB |
1984 | m = gfc_match_expr (&iter->var); |
1985 | if (m != MATCH_YES) | |
1986 | goto cleanup; | |
1987 | ||
1988 | if (gfc_match_char ('=') != MATCH_YES | |
1989 | || iter->var->expr_type != EXPR_VARIABLE) | |
e5ca9693 | 1990 | { |
8c6a85e3 TB |
1991 | m = MATCH_NO; |
1992 | goto cleanup; | |
1993 | } | |
e5ca9693 | 1994 | |
8c6a85e3 TB |
1995 | m = gfc_match_expr (&iter->start); |
1996 | if (m != MATCH_YES) | |
1997 | goto cleanup; | |
e5ca9693 | 1998 | |
8c6a85e3 TB |
1999 | if (gfc_match_char (':') != MATCH_YES) |
2000 | goto syntax; | |
e5ca9693 | 2001 | |
8c6a85e3 TB |
2002 | m = gfc_match_expr (&iter->end); |
2003 | if (m == MATCH_NO) | |
2004 | goto syntax; | |
2005 | if (m == MATCH_ERROR) | |
2006 | goto cleanup; | |
84fa59a7 | 2007 | |
8c6a85e3 TB |
2008 | if (gfc_match_char (':') == MATCH_NO) |
2009 | iter->stride = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1); | |
2010 | else | |
6c7a4dfd | 2011 | { |
8c6a85e3 TB |
2012 | m = gfc_match_expr (&iter->stride); |
2013 | if (m == MATCH_NO) | |
2014 | goto syntax; | |
2015 | if (m == MATCH_ERROR) | |
2016 | goto cleanup; | |
6c7a4dfd JJ |
2017 | } |
2018 | ||
8c6a85e3 TB |
2019 | /* Mark the iteration variable's symbol as used as a FORALL index. */ |
2020 | iter->var->symtree->n.sym->forall_index = true; | |
6de9cd9a | 2021 | |
8c6a85e3 | 2022 | *result = iter; |
6de9cd9a | 2023 | return MATCH_YES; |
6de9cd9a | 2024 | |
8c6a85e3 TB |
2025 | syntax: |
2026 | gfc_error ("Syntax error in FORALL iterator at %C"); | |
2027 | m = MATCH_ERROR; | |
6de9cd9a | 2028 | |
8c6a85e3 | 2029 | cleanup: |
6de9cd9a | 2030 | |
8c6a85e3 TB |
2031 | gfc_current_locus = where; |
2032 | gfc_free_forall_iterator (iter); | |
2033 | return m; | |
6de9cd9a DN |
2034 | } |
2035 | ||
2036 | ||
8c6a85e3 | 2037 | /* Match the header of a FORALL statement. */ |
6de9cd9a DN |
2038 | |
2039 | static match | |
8c6a85e3 | 2040 | match_forall_header (gfc_forall_iterator **phead, gfc_expr **mask) |
6de9cd9a | 2041 | { |
8c6a85e3 TB |
2042 | gfc_forall_iterator *head, *tail, *new_iter; |
2043 | gfc_expr *msk; | |
6de9cd9a DN |
2044 | match m; |
2045 | ||
8c6a85e3 | 2046 | gfc_gobble_whitespace (); |
6de9cd9a | 2047 | |
8c6a85e3 TB |
2048 | head = tail = NULL; |
2049 | msk = NULL; | |
6de9cd9a | 2050 | |
8c6a85e3 TB |
2051 | if (gfc_match_char ('(') != MATCH_YES) |
2052 | return MATCH_NO; | |
6d1b0f92 | 2053 | |
8c6a85e3 TB |
2054 | m = match_forall_iterator (&new_iter); |
2055 | if (m == MATCH_ERROR) | |
2056 | goto cleanup; | |
2057 | if (m == MATCH_NO) | |
2058 | goto syntax; | |
6de9cd9a | 2059 | |
8c6a85e3 | 2060 | head = tail = new_iter; |
f1f39033 | 2061 | |
8c6a85e3 | 2062 | for (;;) |
d0a4a61c | 2063 | { |
8c6a85e3 TB |
2064 | if (gfc_match_char (',') != MATCH_YES) |
2065 | break; | |
d0a4a61c | 2066 | |
8c6a85e3 TB |
2067 | m = match_forall_iterator (&new_iter); |
2068 | if (m == MATCH_ERROR) | |
2069 | goto cleanup; | |
5d2d72cb | 2070 | |
8c6a85e3 | 2071 | if (m == MATCH_YES) |
5d2d72cb | 2072 | { |
8c6a85e3 TB |
2073 | tail->next = new_iter; |
2074 | tail = new_iter; | |
2075 | continue; | |
6d1b0f92 JD |
2076 | } |
2077 | ||
8c6a85e3 | 2078 | /* Have to have a mask expression. */ |
6d1b0f92 | 2079 | |
8c6a85e3 TB |
2080 | m = gfc_match_expr (&msk); |
2081 | if (m == MATCH_NO) | |
2082 | goto syntax; | |
2083 | if (m == MATCH_ERROR) | |
2084 | goto cleanup; | |
6d1b0f92 | 2085 | |
d0a4a61c | 2086 | break; |
d0a4a61c TB |
2087 | } |
2088 | ||
8c6a85e3 TB |
2089 | if (gfc_match_char (')') == MATCH_NO) |
2090 | goto syntax; | |
6de9cd9a | 2091 | |
8c6a85e3 TB |
2092 | *phead = head; |
2093 | *mask = msk; | |
6de9cd9a DN |
2094 | return MATCH_YES; |
2095 | ||
2096 | syntax: | |
8c6a85e3 | 2097 | gfc_syntax_error (ST_FORALL); |
6de9cd9a DN |
2098 | |
2099 | cleanup: | |
8c6a85e3 TB |
2100 | gfc_free_expr (msk); |
2101 | gfc_free_forall_iterator (head); | |
6de9cd9a | 2102 | |
6de9cd9a DN |
2103 | return MATCH_ERROR; |
2104 | } | |
2105 | ||
8b704316 | 2106 | /* Match the rest of a simple FORALL statement that follows an |
8c6a85e3 | 2107 | IF statement. */ |
66e4ab31 | 2108 | |
8c6a85e3 TB |
2109 | static match |
2110 | match_simple_forall (void) | |
6de9cd9a | 2111 | { |
8c6a85e3 TB |
2112 | gfc_forall_iterator *head; |
2113 | gfc_expr *mask; | |
2114 | gfc_code *c; | |
6de9cd9a DN |
2115 | match m; |
2116 | ||
8c6a85e3 TB |
2117 | mask = NULL; |
2118 | head = NULL; | |
2119 | c = NULL; | |
6de9cd9a | 2120 | |
8c6a85e3 | 2121 | m = match_forall_header (&head, &mask); |
6de9cd9a | 2122 | |
8c6a85e3 TB |
2123 | if (m == MATCH_NO) |
2124 | goto syntax; | |
2125 | if (m != MATCH_YES) | |
2126 | goto cleanup; | |
6de9cd9a | 2127 | |
8c6a85e3 | 2128 | m = gfc_match_assignment (); |
6de9cd9a | 2129 | |
8c6a85e3 TB |
2130 | if (m == MATCH_ERROR) |
2131 | goto cleanup; | |
2132 | if (m == MATCH_NO) | |
2133 | { | |
2134 | m = gfc_match_pointer_assignment (); | |
2135 | if (m == MATCH_ERROR) | |
2136 | goto cleanup; | |
2137 | if (m == MATCH_NO) | |
2138 | goto syntax; | |
2139 | } | |
6de9cd9a | 2140 | |
11e5274a | 2141 | c = XCNEW (gfc_code); |
8c6a85e3 TB |
2142 | *c = new_st; |
2143 | c->loc = gfc_current_locus; | |
d0a4a61c | 2144 | |
8c6a85e3 TB |
2145 | if (gfc_match_eos () != MATCH_YES) |
2146 | goto syntax; | |
d0a4a61c | 2147 | |
8c6a85e3 TB |
2148 | gfc_clear_new_st (); |
2149 | new_st.op = EXEC_FORALL; | |
2150 | new_st.expr1 = mask; | |
2151 | new_st.ext.forall_iterator = head; | |
11e5274a | 2152 | new_st.block = gfc_get_code (EXEC_FORALL); |
8c6a85e3 | 2153 | new_st.block->next = c; |
d0a4a61c | 2154 | |
8c6a85e3 | 2155 | return MATCH_YES; |
5493aa17 | 2156 | |
8c6a85e3 TB |
2157 | syntax: |
2158 | gfc_syntax_error (ST_FORALL); | |
5493aa17 | 2159 | |
8c6a85e3 TB |
2160 | cleanup: |
2161 | gfc_free_forall_iterator (head); | |
2162 | gfc_free_expr (mask); | |
5493aa17 | 2163 | |
8c6a85e3 TB |
2164 | return MATCH_ERROR; |
2165 | } | |
5493aa17 | 2166 | |
5493aa17 | 2167 | |
8c6a85e3 | 2168 | /* Match a FORALL statement. */ |
5493aa17 | 2169 | |
8c6a85e3 TB |
2170 | match |
2171 | gfc_match_forall (gfc_statement *st) | |
2172 | { | |
2173 | gfc_forall_iterator *head; | |
2174 | gfc_expr *mask; | |
2175 | gfc_code *c; | |
2176 | match m0, m; | |
5493aa17 | 2177 | |
8c6a85e3 TB |
2178 | head = NULL; |
2179 | mask = NULL; | |
2180 | c = NULL; | |
5493aa17 | 2181 | |
8c6a85e3 TB |
2182 | m0 = gfc_match_label (); |
2183 | if (m0 == MATCH_ERROR) | |
2184 | return MATCH_ERROR; | |
2185 | ||
2186 | m = gfc_match (" forall"); | |
2187 | if (m != MATCH_YES) | |
2188 | return m; | |
2189 | ||
2190 | m = match_forall_header (&head, &mask); | |
5493aa17 | 2191 | if (m == MATCH_ERROR) |
8c6a85e3 | 2192 | goto cleanup; |
5493aa17 | 2193 | if (m == MATCH_NO) |
8c6a85e3 TB |
2194 | goto syntax; |
2195 | ||
2196 | if (gfc_match_eos () == MATCH_YES) | |
5493aa17 | 2197 | { |
8c6a85e3 TB |
2198 | *st = ST_FORALL_BLOCK; |
2199 | new_st.op = EXEC_FORALL; | |
2200 | new_st.expr1 = mask; | |
2201 | new_st.ext.forall_iterator = head; | |
2202 | return MATCH_YES; | |
5493aa17 TB |
2203 | } |
2204 | ||
8c6a85e3 TB |
2205 | m = gfc_match_assignment (); |
2206 | if (m == MATCH_ERROR) | |
2207 | goto cleanup; | |
2208 | if (m == MATCH_NO) | |
5493aa17 | 2209 | { |
8c6a85e3 | 2210 | m = gfc_match_pointer_assignment (); |
5493aa17 | 2211 | if (m == MATCH_ERROR) |
8c6a85e3 TB |
2212 | goto cleanup; |
2213 | if (m == MATCH_NO) | |
5493aa17 | 2214 | goto syntax; |
8c6a85e3 | 2215 | } |
5493aa17 | 2216 | |
11e5274a | 2217 | c = XCNEW (gfc_code); |
8c6a85e3 TB |
2218 | *c = new_st; |
2219 | c->loc = gfc_current_locus; | |
5493aa17 | 2220 | |
8c6a85e3 TB |
2221 | gfc_clear_new_st (); |
2222 | new_st.op = EXEC_FORALL; | |
2223 | new_st.expr1 = mask; | |
2224 | new_st.ext.forall_iterator = head; | |
11e5274a | 2225 | new_st.block = gfc_get_code (EXEC_FORALL); |
8c6a85e3 | 2226 | new_st.block->next = c; |
5493aa17 | 2227 | |
8c6a85e3 TB |
2228 | *st = ST_FORALL; |
2229 | return MATCH_YES; | |
5493aa17 | 2230 | |
8c6a85e3 TB |
2231 | syntax: |
2232 | gfc_syntax_error (ST_FORALL); | |
5493aa17 | 2233 | |
8c6a85e3 TB |
2234 | cleanup: |
2235 | gfc_free_forall_iterator (head); | |
2236 | gfc_free_expr (mask); | |
2237 | gfc_free_statements (c); | |
2238 | return MATCH_NO; | |
2239 | } | |
5493aa17 | 2240 | |
5493aa17 | 2241 | |
8c6a85e3 | 2242 | /* Match a DO statement. */ |
5493aa17 | 2243 | |
8c6a85e3 TB |
2244 | match |
2245 | gfc_match_do (void) | |
2246 | { | |
2247 | gfc_iterator iter, *ip; | |
2248 | locus old_loc; | |
2249 | gfc_st_label *label; | |
2250 | match m; | |
5493aa17 | 2251 | |
8c6a85e3 TB |
2252 | old_loc = gfc_current_locus; |
2253 | ||
2254 | label = NULL; | |
2255 | iter.var = iter.start = iter.end = iter.step = NULL; | |
5493aa17 | 2256 | |
8c6a85e3 | 2257 | m = gfc_match_label (); |
5493aa17 | 2258 | if (m == MATCH_ERROR) |
8c6a85e3 | 2259 | return m; |
5493aa17 | 2260 | |
8c6a85e3 TB |
2261 | if (gfc_match (" do") != MATCH_YES) |
2262 | return MATCH_NO; | |
5493aa17 | 2263 | |
8c6a85e3 TB |
2264 | m = gfc_match_st_label (&label); |
2265 | if (m == MATCH_ERROR) | |
2266 | goto cleanup; | |
2267 | ||
2268 | /* Match an infinite DO, make it like a DO WHILE(.TRUE.). */ | |
2269 | ||
2270 | if (gfc_match_eos () == MATCH_YES) | |
5493aa17 | 2271 | { |
8c6a85e3 TB |
2272 | iter.end = gfc_get_logical_expr (gfc_default_logical_kind, NULL, true); |
2273 | new_st.op = EXEC_DO_WHILE; | |
2274 | goto done; | |
5493aa17 TB |
2275 | } |
2276 | ||
8c6a85e3 TB |
2277 | /* Match an optional comma, if no comma is found, a space is obligatory. */ |
2278 | if (gfc_match_char (',') != MATCH_YES && gfc_match ("% ") != MATCH_YES) | |
2279 | return MATCH_NO; | |
5493aa17 | 2280 | |
8c6a85e3 | 2281 | /* Check for balanced parens. */ |
8b704316 | 2282 | |
8c6a85e3 TB |
2283 | if (gfc_match_parens () == MATCH_ERROR) |
2284 | return MATCH_ERROR; | |
5493aa17 | 2285 | |
8c6a85e3 TB |
2286 | if (gfc_match (" concurrent") == MATCH_YES) |
2287 | { | |
2288 | gfc_forall_iterator *head; | |
2289 | gfc_expr *mask; | |
5493aa17 | 2290 | |
524af0d6 | 2291 | if (!gfc_notify_std (GFC_STD_F2008, "DO CONCURRENT construct at %C")) |
8c6a85e3 | 2292 | return MATCH_ERROR; |
5493aa17 | 2293 | |
d0a4a61c | 2294 | |
8c6a85e3 TB |
2295 | mask = NULL; |
2296 | head = NULL; | |
2297 | m = match_forall_header (&head, &mask); | |
d0a4a61c | 2298 | |
8c6a85e3 TB |
2299 | if (m == MATCH_NO) |
2300 | return m; | |
2301 | if (m == MATCH_ERROR) | |
2302 | goto concurr_cleanup; | |
d0a4a61c | 2303 | |
8c6a85e3 TB |
2304 | if (gfc_match_eos () != MATCH_YES) |
2305 | goto concurr_cleanup; | |
d0a4a61c | 2306 | |
8c6a85e3 | 2307 | if (label != NULL |
524af0d6 | 2308 | && !gfc_reference_st_label (label, ST_LABEL_DO_TARGET)) |
8c6a85e3 | 2309 | goto concurr_cleanup; |
f1f39033 | 2310 | |
8c6a85e3 TB |
2311 | new_st.label1 = label; |
2312 | new_st.op = EXEC_DO_CONCURRENT; | |
2313 | new_st.expr1 = mask; | |
2314 | new_st.ext.forall_iterator = head; | |
d0a4a61c | 2315 | |
8c6a85e3 | 2316 | return MATCH_YES; |
f4d1d50a | 2317 | |
8c6a85e3 TB |
2318 | concurr_cleanup: |
2319 | gfc_syntax_error (ST_DO); | |
2320 | gfc_free_expr (mask); | |
2321 | gfc_free_forall_iterator (head); | |
d0a4a61c TB |
2322 | return MATCH_ERROR; |
2323 | } | |
5493aa17 | 2324 | |
8c6a85e3 TB |
2325 | /* See if we have a DO WHILE. */ |
2326 | if (gfc_match (" while ( %e )%t", &iter.end) == MATCH_YES) | |
d0a4a61c | 2327 | { |
8c6a85e3 | 2328 | new_st.op = EXEC_DO_WHILE; |
d0a4a61c TB |
2329 | goto done; |
2330 | } | |
2331 | ||
8c6a85e3 TB |
2332 | /* The abortive DO WHILE may have done something to the symbol |
2333 | table, so we start over. */ | |
2334 | gfc_undo_symbols (); | |
2335 | gfc_current_locus = old_loc; | |
5493aa17 | 2336 | |
8c6a85e3 TB |
2337 | gfc_match_label (); /* This won't error. */ |
2338 | gfc_match (" do "); /* This will work. */ | |
d0a4a61c | 2339 | |
8c6a85e3 TB |
2340 | gfc_match_st_label (&label); /* Can't error out. */ |
2341 | gfc_match_char (','); /* Optional comma. */ | |
d0a4a61c | 2342 | |
8c6a85e3 TB |
2343 | m = gfc_match_iterator (&iter, 0); |
2344 | if (m == MATCH_NO) | |
2345 | return MATCH_NO; | |
2346 | if (m == MATCH_ERROR) | |
2347 | goto cleanup; | |
d0a4a61c | 2348 | |
8c6a85e3 TB |
2349 | iter.var->symtree->n.sym->attr.implied_index = 0; |
2350 | gfc_check_do_variable (iter.var->symtree); | |
d0a4a61c | 2351 | |
8c6a85e3 TB |
2352 | if (gfc_match_eos () != MATCH_YES) |
2353 | { | |
2354 | gfc_syntax_error (ST_DO); | |
2355 | goto cleanup; | |
d0a4a61c TB |
2356 | } |
2357 | ||
8c6a85e3 | 2358 | new_st.op = EXEC_DO; |
d0a4a61c TB |
2359 | |
2360 | done: | |
8c6a85e3 | 2361 | if (label != NULL |
524af0d6 | 2362 | && !gfc_reference_st_label (label, ST_LABEL_DO_TARGET)) |
8c6a85e3 TB |
2363 | goto cleanup; |
2364 | ||
2365 | new_st.label1 = label; | |
2366 | ||
2367 | if (new_st.op == EXEC_DO_WHILE) | |
2368 | new_st.expr1 = iter.end; | |
2369 | else | |
d0a4a61c | 2370 | { |
8c6a85e3 TB |
2371 | new_st.ext.iterator = ip = gfc_get_iterator (); |
2372 | *ip = iter; | |
d0a4a61c TB |
2373 | } |
2374 | ||
d0a4a61c TB |
2375 | return MATCH_YES; |
2376 | ||
d0a4a61c | 2377 | cleanup: |
8c6a85e3 | 2378 | gfc_free_iterator (&iter, 0); |
d0a4a61c TB |
2379 | |
2380 | return MATCH_ERROR; | |
2381 | } | |
2382 | ||
2383 | ||
8c6a85e3 | 2384 | /* Match an EXIT or CYCLE statement. */ |
d0a4a61c | 2385 | |
8c6a85e3 TB |
2386 | static match |
2387 | match_exit_cycle (gfc_statement st, gfc_exec_op op) | |
d0a4a61c | 2388 | { |
8c6a85e3 TB |
2389 | gfc_state_data *p, *o; |
2390 | gfc_symbol *sym; | |
2391 | match m; | |
2392 | int cnt; | |
d0a4a61c | 2393 | |
8c6a85e3 TB |
2394 | if (gfc_match_eos () == MATCH_YES) |
2395 | sym = NULL; | |
2396 | else | |
2397 | { | |
2398 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2399 | gfc_symtree* stree; | |
d0a4a61c | 2400 | |
8c6a85e3 TB |
2401 | m = gfc_match ("% %n%t", name); |
2402 | if (m == MATCH_ERROR) | |
2403 | return MATCH_ERROR; | |
2404 | if (m == MATCH_NO) | |
2405 | { | |
2406 | gfc_syntax_error (st); | |
2407 | return MATCH_ERROR; | |
2408 | } | |
d0a4a61c | 2409 | |
8c6a85e3 TB |
2410 | /* Find the corresponding symbol. If there's a BLOCK statement |
2411 | between here and the label, it is not in gfc_current_ns but a parent | |
2412 | namespace! */ | |
2413 | stree = gfc_find_symtree_in_proc (name, gfc_current_ns); | |
2414 | if (!stree) | |
2415 | { | |
a4d9b221 | 2416 | gfc_error ("Name %qs in %s statement at %C is unknown", |
8c6a85e3 TB |
2417 | name, gfc_ascii_statement (st)); |
2418 | return MATCH_ERROR; | |
2419 | } | |
d0a4a61c | 2420 | |
8c6a85e3 TB |
2421 | sym = stree->n.sym; |
2422 | if (sym->attr.flavor != FL_LABEL) | |
2423 | { | |
a4d9b221 | 2424 | gfc_error ("Name %qs in %s statement at %C is not a construct name", |
8c6a85e3 TB |
2425 | name, gfc_ascii_statement (st)); |
2426 | return MATCH_ERROR; | |
2427 | } | |
2428 | } | |
d0a4a61c | 2429 | |
8c6a85e3 TB |
2430 | /* Find the loop specified by the label (or lack of a label). */ |
2431 | for (o = NULL, p = gfc_state_stack; p; p = p->previous) | |
2432 | if (o == NULL && p->state == COMP_OMP_STRUCTURED_BLOCK) | |
2433 | o = p; | |
2434 | else if (p->state == COMP_CRITICAL) | |
2435 | { | |
2436 | gfc_error("%s statement at %C leaves CRITICAL construct", | |
2437 | gfc_ascii_statement (st)); | |
2438 | return MATCH_ERROR; | |
2439 | } | |
2440 | else if (p->state == COMP_DO_CONCURRENT | |
2441 | && (op == EXEC_EXIT || (sym && sym != p->sym))) | |
2442 | { | |
2443 | /* F2008, C821 & C845. */ | |
2444 | gfc_error("%s statement at %C leaves DO CONCURRENT construct", | |
2445 | gfc_ascii_statement (st)); | |
2446 | return MATCH_ERROR; | |
2447 | } | |
2448 | else if ((sym && sym == p->sym) | |
2449 | || (!sym && (p->state == COMP_DO | |
2450 | || p->state == COMP_DO_CONCURRENT))) | |
2451 | break; | |
6de9cd9a | 2452 | |
8c6a85e3 | 2453 | if (p == NULL) |
6de9cd9a | 2454 | { |
8c6a85e3 TB |
2455 | if (sym == NULL) |
2456 | gfc_error ("%s statement at %C is not within a construct", | |
2457 | gfc_ascii_statement (st)); | |
2458 | else | |
a4d9b221 | 2459 | gfc_error ("%s statement at %C is not within construct %qs", |
8c6a85e3 TB |
2460 | gfc_ascii_statement (st), sym->name); |
2461 | ||
6de9cd9a DN |
2462 | return MATCH_ERROR; |
2463 | } | |
2464 | ||
8c6a85e3 TB |
2465 | /* Special checks for EXIT from non-loop constructs. */ |
2466 | switch (p->state) | |
2467 | { | |
2468 | case COMP_DO: | |
2469 | case COMP_DO_CONCURRENT: | |
2470 | break; | |
2471 | ||
2472 | case COMP_CRITICAL: | |
2473 | /* This is already handled above. */ | |
2474 | gcc_unreachable (); | |
2475 | ||
2476 | case COMP_ASSOCIATE: | |
2477 | case COMP_BLOCK: | |
2478 | case COMP_IF: | |
2479 | case COMP_SELECT: | |
2480 | case COMP_SELECT_TYPE: | |
2481 | gcc_assert (sym); | |
2482 | if (op == EXEC_CYCLE) | |
2483 | { | |
2484 | gfc_error ("CYCLE statement at %C is not applicable to non-loop" | |
a4d9b221 | 2485 | " construct %qs", sym->name); |
8c6a85e3 TB |
2486 | return MATCH_ERROR; |
2487 | } | |
2488 | gcc_assert (op == EXEC_EXIT); | |
524af0d6 JB |
2489 | if (!gfc_notify_std (GFC_STD_F2008, "EXIT statement with no" |
2490 | " do-construct-name at %C")) | |
8c6a85e3 TB |
2491 | return MATCH_ERROR; |
2492 | break; | |
8b704316 | 2493 | |
8c6a85e3 | 2494 | default: |
a4d9b221 | 2495 | gfc_error ("%s statement at %C is not applicable to construct %qs", |
8c6a85e3 TB |
2496 | gfc_ascii_statement (st), sym->name); |
2497 | return MATCH_ERROR; | |
2498 | } | |
2499 | ||
2500 | if (o != NULL) | |
2501 | { | |
41dbbb37 TS |
2502 | gfc_error (is_oacc (p) |
2503 | ? "%s statement at %C leaving OpenACC structured block" | |
2504 | : "%s statement at %C leaving OpenMP structured block", | |
8c6a85e3 TB |
2505 | gfc_ascii_statement (st)); |
2506 | return MATCH_ERROR; | |
2507 | } | |
2508 | ||
2509 | for (o = p, cnt = 0; o->state == COMP_DO && o->previous != NULL; cnt++) | |
2510 | o = o->previous; | |
2511 | if (cnt > 0 | |
2512 | && o != NULL | |
2513 | && o->state == COMP_OMP_STRUCTURED_BLOCK | |
41dbbb37 TS |
2514 | && (o->head->op == EXEC_OACC_LOOP |
2515 | || o->head->op == EXEC_OACC_PARALLEL_LOOP)) | |
2516 | { | |
2517 | int collapse = 1; | |
2518 | gcc_assert (o->head->next != NULL | |
2519 | && (o->head->next->op == EXEC_DO | |
2520 | || o->head->next->op == EXEC_DO_WHILE) | |
2521 | && o->previous != NULL | |
2522 | && o->previous->tail->op == o->head->op); | |
2523 | if (o->previous->tail->ext.omp_clauses != NULL | |
2524 | && o->previous->tail->ext.omp_clauses->collapse > 1) | |
2525 | collapse = o->previous->tail->ext.omp_clauses->collapse; | |
2526 | if (st == ST_EXIT && cnt <= collapse) | |
2527 | { | |
2528 | gfc_error ("EXIT statement at %C terminating !$ACC LOOP loop"); | |
2529 | return MATCH_ERROR; | |
2530 | } | |
2531 | if (st == ST_CYCLE && cnt < collapse) | |
2532 | { | |
2533 | gfc_error ("CYCLE statement at %C to non-innermost collapsed" | |
2534 | " !$ACC LOOP loop"); | |
2535 | return MATCH_ERROR; | |
2536 | } | |
2537 | } | |
2538 | if (cnt > 0 | |
2539 | && o != NULL | |
2540 | && (o->state == COMP_OMP_STRUCTURED_BLOCK) | |
8c6a85e3 | 2541 | && (o->head->op == EXEC_OMP_DO |
dd2fc525 JJ |
2542 | || o->head->op == EXEC_OMP_PARALLEL_DO |
2543 | || o->head->op == EXEC_OMP_SIMD | |
2544 | || o->head->op == EXEC_OMP_DO_SIMD | |
2545 | || o->head->op == EXEC_OMP_PARALLEL_DO_SIMD)) | |
8c6a85e3 TB |
2546 | { |
2547 | int collapse = 1; | |
2548 | gcc_assert (o->head->next != NULL | |
2549 | && (o->head->next->op == EXEC_DO | |
2550 | || o->head->next->op == EXEC_DO_WHILE) | |
2551 | && o->previous != NULL | |
2552 | && o->previous->tail->op == o->head->op); | |
2553 | if (o->previous->tail->ext.omp_clauses != NULL | |
2554 | && o->previous->tail->ext.omp_clauses->collapse > 1) | |
2555 | collapse = o->previous->tail->ext.omp_clauses->collapse; | |
2556 | if (st == ST_EXIT && cnt <= collapse) | |
2557 | { | |
2558 | gfc_error ("EXIT statement at %C terminating !$OMP DO loop"); | |
2559 | return MATCH_ERROR; | |
2560 | } | |
2561 | if (st == ST_CYCLE && cnt < collapse) | |
2562 | { | |
2563 | gfc_error ("CYCLE statement at %C to non-innermost collapsed" | |
2564 | " !$OMP DO loop"); | |
2565 | return MATCH_ERROR; | |
2566 | } | |
2567 | } | |
2568 | ||
2569 | /* Save the first statement in the construct - needed by the backend. */ | |
2570 | new_st.ext.which_construct = p->construct; | |
2571 | ||
2572 | new_st.op = op; | |
2573 | ||
6de9cd9a DN |
2574 | return MATCH_YES; |
2575 | } | |
2576 | ||
2577 | ||
8c6a85e3 | 2578 | /* Match the EXIT statement. */ |
6de9cd9a DN |
2579 | |
2580 | match | |
8c6a85e3 | 2581 | gfc_match_exit (void) |
6de9cd9a | 2582 | { |
8c6a85e3 TB |
2583 | return match_exit_cycle (ST_EXIT, EXEC_EXIT); |
2584 | } | |
6de9cd9a | 2585 | |
6de9cd9a | 2586 | |
8c6a85e3 | 2587 | /* Match the CYCLE statement. */ |
6de9cd9a | 2588 | |
8c6a85e3 TB |
2589 | match |
2590 | gfc_match_cycle (void) | |
2591 | { | |
2592 | return match_exit_cycle (ST_CYCLE, EXEC_CYCLE); | |
6de9cd9a DN |
2593 | } |
2594 | ||
2595 | ||
2e9cc48c TB |
2596 | /* Match a number or character constant after an (ERROR) STOP or PAUSE |
2597 | statement. */ | |
6de9cd9a | 2598 | |
8c6a85e3 TB |
2599 | static match |
2600 | gfc_match_stopcode (gfc_statement st) | |
6de9cd9a | 2601 | { |
8c6a85e3 | 2602 | gfc_expr *e; |
6de9cd9a DN |
2603 | match m; |
2604 | ||
8c6a85e3 TB |
2605 | e = NULL; |
2606 | ||
2607 | if (gfc_match_eos () != MATCH_YES) | |
6de9cd9a | 2608 | { |
8c6a85e3 TB |
2609 | m = gfc_match_init_expr (&e); |
2610 | if (m == MATCH_ERROR) | |
2611 | goto cleanup; | |
2612 | if (m == MATCH_NO) | |
2613 | goto syntax; | |
6de9cd9a | 2614 | |
8c6a85e3 TB |
2615 | if (gfc_match_eos () != MATCH_YES) |
2616 | goto syntax; | |
6de9cd9a DN |
2617 | } |
2618 | ||
8c6a85e3 | 2619 | if (gfc_pure (NULL)) |
6de9cd9a | 2620 | { |
2e9cc48c TB |
2621 | if (st == ST_ERROR_STOP) |
2622 | { | |
2623 | if (!gfc_notify_std (GFC_STD_F2015, "%s statement at %C in PURE " | |
2624 | "procedure", gfc_ascii_statement (st))) | |
2625 | goto cleanup; | |
2626 | } | |
2627 | else | |
2628 | { | |
2629 | gfc_error ("%s statement not allowed in PURE procedure at %C", | |
2630 | gfc_ascii_statement (st)); | |
2631 | goto cleanup; | |
2632 | } | |
8c6a85e3 | 2633 | } |
6de9cd9a | 2634 | |
ccd7751b | 2635 | gfc_unset_implicit_pure (NULL); |
6de9cd9a | 2636 | |
524af0d6 | 2637 | if (st == ST_STOP && gfc_find_state (COMP_CRITICAL)) |
8c6a85e3 TB |
2638 | { |
2639 | gfc_error ("Image control statement STOP at %C in CRITICAL block"); | |
2640 | goto cleanup; | |
2641 | } | |
524af0d6 | 2642 | if (st == ST_STOP && gfc_find_state (COMP_DO_CONCURRENT)) |
8c6a85e3 TB |
2643 | { |
2644 | gfc_error ("Image control statement STOP at %C in DO CONCURRENT block"); | |
2645 | goto cleanup; | |
2646 | } | |
6de9cd9a | 2647 | |
8c6a85e3 TB |
2648 | if (e != NULL) |
2649 | { | |
2650 | if (!(e->ts.type == BT_CHARACTER || e->ts.type == BT_INTEGER)) | |
6de9cd9a | 2651 | { |
8c6a85e3 TB |
2652 | gfc_error ("STOP code at %L must be either INTEGER or CHARACTER type", |
2653 | &e->where); | |
2654 | goto cleanup; | |
6de9cd9a | 2655 | } |
6de9cd9a | 2656 | |
8c6a85e3 | 2657 | if (e->rank != 0) |
6de9cd9a | 2658 | { |
8c6a85e3 TB |
2659 | gfc_error ("STOP code at %L must be scalar", |
2660 | &e->where); | |
2661 | goto cleanup; | |
6de9cd9a | 2662 | } |
6de9cd9a | 2663 | |
8c6a85e3 TB |
2664 | if (e->ts.type == BT_CHARACTER |
2665 | && e->ts.kind != gfc_default_character_kind) | |
6de9cd9a | 2666 | { |
8c6a85e3 TB |
2667 | gfc_error ("STOP code at %L must be default character KIND=%d", |
2668 | &e->where, (int) gfc_default_character_kind); | |
2669 | goto cleanup; | |
6de9cd9a | 2670 | } |
6de9cd9a | 2671 | |
8c6a85e3 TB |
2672 | if (e->ts.type == BT_INTEGER |
2673 | && e->ts.kind != gfc_default_integer_kind) | |
2674 | { | |
2675 | gfc_error ("STOP code at %L must be default integer KIND=%d", | |
2676 | &e->where, (int) gfc_default_integer_kind); | |
2677 | goto cleanup; | |
2678 | } | |
6de9cd9a DN |
2679 | } |
2680 | ||
8c6a85e3 | 2681 | switch (st) |
6de9cd9a | 2682 | { |
8c6a85e3 TB |
2683 | case ST_STOP: |
2684 | new_st.op = EXEC_STOP; | |
2685 | break; | |
2686 | case ST_ERROR_STOP: | |
2687 | new_st.op = EXEC_ERROR_STOP; | |
2688 | break; | |
2689 | case ST_PAUSE: | |
2690 | new_st.op = EXEC_PAUSE; | |
2691 | break; | |
2692 | default: | |
2693 | gcc_unreachable (); | |
6de9cd9a DN |
2694 | } |
2695 | ||
8c6a85e3 TB |
2696 | new_st.expr1 = e; |
2697 | new_st.ext.stop_code = -1; | |
6de9cd9a | 2698 | |
6de9cd9a DN |
2699 | return MATCH_YES; |
2700 | ||
2701 | syntax: | |
8c6a85e3 TB |
2702 | gfc_syntax_error (st); |
2703 | ||
6de9cd9a | 2704 | cleanup: |
8c6a85e3 TB |
2705 | |
2706 | gfc_free_expr (e); | |
6de9cd9a DN |
2707 | return MATCH_ERROR; |
2708 | } | |
2709 | ||
2710 | ||
8c6a85e3 | 2711 | /* Match the (deprecated) PAUSE statement. */ |
6de9cd9a | 2712 | |
8c6a85e3 TB |
2713 | match |
2714 | gfc_match_pause (void) | |
6de9cd9a | 2715 | { |
8c6a85e3 | 2716 | match m; |
6de9cd9a | 2717 | |
8c6a85e3 TB |
2718 | m = gfc_match_stopcode (ST_PAUSE); |
2719 | if (m == MATCH_YES) | |
6de9cd9a | 2720 | { |
524af0d6 | 2721 | if (!gfc_notify_std (GFC_STD_F95_DEL, "PAUSE statement at %C")) |
8c6a85e3 | 2722 | m = MATCH_ERROR; |
6de9cd9a | 2723 | } |
8c6a85e3 | 2724 | return m; |
6de9cd9a DN |
2725 | } |
2726 | ||
2727 | ||
8c6a85e3 | 2728 | /* Match the STOP statement. */ |
cf2b3c22 | 2729 | |
8c6a85e3 TB |
2730 | match |
2731 | gfc_match_stop (void) | |
cf2b3c22 | 2732 | { |
8c6a85e3 TB |
2733 | return gfc_match_stopcode (ST_STOP); |
2734 | } | |
cf2b3c22 | 2735 | |
1fccc6c3 | 2736 | |
8c6a85e3 | 2737 | /* Match the ERROR STOP statement. */ |
1fccc6c3 | 2738 | |
8c6a85e3 TB |
2739 | match |
2740 | gfc_match_error_stop (void) | |
2741 | { | |
524af0d6 | 2742 | if (!gfc_notify_std (GFC_STD_F2008, "ERROR STOP statement at %C")) |
8c6a85e3 | 2743 | return MATCH_ERROR; |
cf2b3c22 | 2744 | |
8c6a85e3 | 2745 | return gfc_match_stopcode (ST_ERROR_STOP); |
cf2b3c22 TB |
2746 | } |
2747 | ||
2748 | ||
8c6a85e3 TB |
2749 | /* Match LOCK/UNLOCK statement. Syntax: |
2750 | LOCK ( lock-variable [ , lock-stat-list ] ) | |
2751 | UNLOCK ( lock-variable [ , sync-stat-list ] ) | |
2752 | where lock-stat is ACQUIRED_LOCK or sync-stat | |
2753 | and sync-stat is STAT= or ERRMSG=. */ | |
8234e5e0 SK |
2754 | |
2755 | static match | |
8c6a85e3 | 2756 | lock_unlock_statement (gfc_statement st) |
8234e5e0 SK |
2757 | { |
2758 | match m; | |
8c6a85e3 TB |
2759 | gfc_expr *tmp, *lockvar, *acq_lock, *stat, *errmsg; |
2760 | bool saw_acq_lock, saw_stat, saw_errmsg; | |
8234e5e0 | 2761 | |
8c6a85e3 TB |
2762 | tmp = lockvar = acq_lock = stat = errmsg = NULL; |
2763 | saw_acq_lock = saw_stat = saw_errmsg = false; | |
8234e5e0 | 2764 | |
8c6a85e3 | 2765 | if (gfc_pure (NULL)) |
1107bd38 | 2766 | { |
8c6a85e3 TB |
2767 | gfc_error ("Image control statement %s at %C in PURE procedure", |
2768 | st == ST_LOCK ? "LOCK" : "UNLOCK"); | |
2769 | return MATCH_ERROR; | |
1107bd38 | 2770 | } |
1107bd38 | 2771 | |
ccd7751b | 2772 | gfc_unset_implicit_pure (NULL); |
8c6a85e3 | 2773 | |
f19626cf | 2774 | if (flag_coarray == GFC_FCOARRAY_NONE) |
8234e5e0 | 2775 | { |
ddc05d11 | 2776 | gfc_fatal_error ("Coarrays disabled at %C, use %<-fcoarray=%> to enable"); |
8c6a85e3 | 2777 | return MATCH_ERROR; |
8234e5e0 SK |
2778 | } |
2779 | ||
524af0d6 | 2780 | if (gfc_find_state (COMP_CRITICAL)) |
8234e5e0 | 2781 | { |
8c6a85e3 TB |
2782 | gfc_error ("Image control statement %s at %C in CRITICAL block", |
2783 | st == ST_LOCK ? "LOCK" : "UNLOCK"); | |
2784 | return MATCH_ERROR; | |
8234e5e0 SK |
2785 | } |
2786 | ||
524af0d6 | 2787 | if (gfc_find_state (COMP_DO_CONCURRENT)) |
8234e5e0 | 2788 | { |
8c6a85e3 TB |
2789 | gfc_error ("Image control statement %s at %C in DO CONCURRENT block", |
2790 | st == ST_LOCK ? "LOCK" : "UNLOCK"); | |
2791 | return MATCH_ERROR; | |
8234e5e0 SK |
2792 | } |
2793 | ||
8c6a85e3 TB |
2794 | if (gfc_match_char ('(') != MATCH_YES) |
2795 | goto syntax; | |
2796 | ||
2797 | if (gfc_match ("%e", &lockvar) != MATCH_YES) | |
2798 | goto syntax; | |
2799 | m = gfc_match_char (','); | |
2800 | if (m == MATCH_ERROR) | |
2801 | goto syntax; | |
2802 | if (m == MATCH_NO) | |
8234e5e0 | 2803 | { |
8c6a85e3 TB |
2804 | m = gfc_match_char (')'); |
2805 | if (m == MATCH_YES) | |
2806 | goto done; | |
2807 | goto syntax; | |
8234e5e0 SK |
2808 | } |
2809 | ||
8c6a85e3 | 2810 | for (;;) |
8234e5e0 | 2811 | { |
8c6a85e3 TB |
2812 | m = gfc_match (" stat = %v", &tmp); |
2813 | if (m == MATCH_ERROR) | |
2814 | goto syntax; | |
2815 | if (m == MATCH_YES) | |
2816 | { | |
2817 | if (saw_stat) | |
2818 | { | |
2819 | gfc_error ("Redundant STAT tag found at %L ", &tmp->where); | |
2820 | goto cleanup; | |
2821 | } | |
2822 | stat = tmp; | |
2823 | saw_stat = true; | |
1fccc6c3 | 2824 | |
8c6a85e3 TB |
2825 | m = gfc_match_char (','); |
2826 | if (m == MATCH_YES) | |
2827 | continue; | |
1fccc6c3 | 2828 | |
8c6a85e3 TB |
2829 | tmp = NULL; |
2830 | break; | |
2831 | } | |
1fccc6c3 | 2832 | |
8c6a85e3 TB |
2833 | m = gfc_match (" errmsg = %v", &tmp); |
2834 | if (m == MATCH_ERROR) | |
2835 | goto syntax; | |
2836 | if (m == MATCH_YES) | |
2837 | { | |
2838 | if (saw_errmsg) | |
2839 | { | |
2840 | gfc_error ("Redundant ERRMSG tag found at %L ", &tmp->where); | |
2841 | goto cleanup; | |
2842 | } | |
2843 | errmsg = tmp; | |
2844 | saw_errmsg = true; | |
8234e5e0 | 2845 | |
8c6a85e3 TB |
2846 | m = gfc_match_char (','); |
2847 | if (m == MATCH_YES) | |
2848 | continue; | |
8234e5e0 | 2849 | |
8c6a85e3 TB |
2850 | tmp = NULL; |
2851 | break; | |
2852 | } | |
8234e5e0 | 2853 | |
8c6a85e3 TB |
2854 | m = gfc_match (" acquired_lock = %v", &tmp); |
2855 | if (m == MATCH_ERROR || st == ST_UNLOCK) | |
2856 | goto syntax; | |
2857 | if (m == MATCH_YES) | |
2858 | { | |
2859 | if (saw_acq_lock) | |
2860 | { | |
2861 | gfc_error ("Redundant ACQUIRED_LOCK tag found at %L ", | |
2862 | &tmp->where); | |
2863 | goto cleanup; | |
2864 | } | |
2865 | acq_lock = tmp; | |
2866 | saw_acq_lock = true; | |
8234e5e0 | 2867 | |
8c6a85e3 TB |
2868 | m = gfc_match_char (','); |
2869 | if (m == MATCH_YES) | |
2870 | continue; | |
2871 | ||
2872 | tmp = NULL; | |
2873 | break; | |
2874 | } | |
2875 | ||
2876 | break; | |
2877 | } | |
2878 | ||
2879 | if (m == MATCH_ERROR) | |
2880 | goto syntax; | |
2881 | ||
2882 | if (gfc_match (" )%t") != MATCH_YES) | |
2883 | goto syntax; | |
2884 | ||
2885 | done: | |
2886 | switch (st) | |
8234e5e0 | 2887 | { |
8c6a85e3 TB |
2888 | case ST_LOCK: |
2889 | new_st.op = EXEC_LOCK; | |
2890 | break; | |
2891 | case ST_UNLOCK: | |
2892 | new_st.op = EXEC_UNLOCK; | |
2893 | break; | |
2894 | default: | |
2895 | gcc_unreachable (); | |
8234e5e0 SK |
2896 | } |
2897 | ||
8c6a85e3 TB |
2898 | new_st.expr1 = lockvar; |
2899 | new_st.expr2 = stat; | |
2900 | new_st.expr3 = errmsg; | |
2901 | new_st.expr4 = acq_lock; | |
8234e5e0 | 2902 | |
8c6a85e3 | 2903 | return MATCH_YES; |
8234e5e0 | 2904 | |
8c6a85e3 TB |
2905 | syntax: |
2906 | gfc_syntax_error (st); | |
2907 | ||
2908 | cleanup: | |
fd2805e1 TB |
2909 | if (acq_lock != tmp) |
2910 | gfc_free_expr (acq_lock); | |
2911 | if (errmsg != tmp) | |
2912 | gfc_free_expr (errmsg); | |
2913 | if (stat != tmp) | |
2914 | gfc_free_expr (stat); | |
2915 | ||
8c6a85e3 TB |
2916 | gfc_free_expr (tmp); |
2917 | gfc_free_expr (lockvar); | |
8c6a85e3 TB |
2918 | |
2919 | return MATCH_ERROR; | |
8234e5e0 SK |
2920 | } |
2921 | ||
2922 | ||
8c6a85e3 TB |
2923 | match |
2924 | gfc_match_lock (void) | |
2925 | { | |
524af0d6 | 2926 | if (!gfc_notify_std (GFC_STD_F2008, "LOCK statement at %C")) |
8c6a85e3 TB |
2927 | return MATCH_ERROR; |
2928 | ||
2929 | return lock_unlock_statement (ST_LOCK); | |
2930 | } | |
2931 | ||
6de9cd9a DN |
2932 | |
2933 | match | |
8c6a85e3 | 2934 | gfc_match_unlock (void) |
6de9cd9a | 2935 | { |
524af0d6 | 2936 | if (!gfc_notify_std (GFC_STD_F2008, "UNLOCK statement at %C")) |
8c6a85e3 | 2937 | return MATCH_ERROR; |
6de9cd9a | 2938 | |
8c6a85e3 TB |
2939 | return lock_unlock_statement (ST_UNLOCK); |
2940 | } | |
6de9cd9a | 2941 | |
6de9cd9a | 2942 | |
8c6a85e3 TB |
2943 | /* Match SYNC ALL/IMAGES/MEMORY statement. Syntax: |
2944 | SYNC ALL [(sync-stat-list)] | |
2945 | SYNC MEMORY [(sync-stat-list)] | |
2946 | SYNC IMAGES (image-set [, sync-stat-list] ) | |
2947 | with sync-stat is int-expr or *. */ | |
1fccc6c3 | 2948 | |
8c6a85e3 TB |
2949 | static match |
2950 | sync_statement (gfc_statement st) | |
2951 | { | |
2952 | match m; | |
2953 | gfc_expr *tmp, *imageset, *stat, *errmsg; | |
2954 | bool saw_stat, saw_errmsg; | |
1fccc6c3 | 2955 | |
8c6a85e3 TB |
2956 | tmp = imageset = stat = errmsg = NULL; |
2957 | saw_stat = saw_errmsg = false; | |
2958 | ||
2959 | if (gfc_pure (NULL)) | |
2960 | { | |
2961 | gfc_error ("Image control statement SYNC at %C in PURE procedure"); | |
2962 | return MATCH_ERROR; | |
1fccc6c3 | 2963 | } |
8c6a85e3 | 2964 | |
ccd7751b | 2965 | gfc_unset_implicit_pure (NULL); |
8c6a85e3 | 2966 | |
524af0d6 | 2967 | if (!gfc_notify_std (GFC_STD_F2008, "SYNC statement at %C")) |
8c6a85e3 TB |
2968 | return MATCH_ERROR; |
2969 | ||
f19626cf | 2970 | if (flag_coarray == GFC_FCOARRAY_NONE) |
8234e5e0 | 2971 | { |
ddc05d11 TB |
2972 | gfc_fatal_error ("Coarrays disabled at %C, use %<-fcoarray=%> to " |
2973 | "enable"); | |
8c6a85e3 TB |
2974 | return MATCH_ERROR; |
2975 | } | |
e69afb29 | 2976 | |
524af0d6 | 2977 | if (gfc_find_state (COMP_CRITICAL)) |
8c6a85e3 TB |
2978 | { |
2979 | gfc_error ("Image control statement SYNC at %C in CRITICAL block"); | |
2980 | return MATCH_ERROR; | |
8234e5e0 SK |
2981 | } |
2982 | ||
524af0d6 | 2983 | if (gfc_find_state (COMP_DO_CONCURRENT)) |
6de9cd9a | 2984 | { |
8c6a85e3 TB |
2985 | gfc_error ("Image control statement SYNC at %C in DO CONCURRENT block"); |
2986 | return MATCH_ERROR; | |
2987 | } | |
6de9cd9a | 2988 | |
8c6a85e3 TB |
2989 | if (gfc_match_eos () == MATCH_YES) |
2990 | { | |
2991 | if (st == ST_SYNC_IMAGES) | |
6de9cd9a | 2992 | goto syntax; |
8c6a85e3 TB |
2993 | goto done; |
2994 | } | |
6de9cd9a | 2995 | |
8c6a85e3 TB |
2996 | if (gfc_match_char ('(') != MATCH_YES) |
2997 | goto syntax; | |
c9583ed2 | 2998 | |
8c6a85e3 TB |
2999 | if (st == ST_SYNC_IMAGES) |
3000 | { | |
3001 | /* Denote '*' as imageset == NULL. */ | |
3002 | m = gfc_match_char ('*'); | |
3003 | if (m == MATCH_ERROR) | |
3004 | goto syntax; | |
3005 | if (m == MATCH_NO) | |
6de9cd9a | 3006 | { |
8c6a85e3 TB |
3007 | if (gfc_match ("%e", &imageset) != MATCH_YES) |
3008 | goto syntax; | |
6de9cd9a | 3009 | } |
8c6a85e3 TB |
3010 | m = gfc_match_char (','); |
3011 | if (m == MATCH_ERROR) | |
3012 | goto syntax; | |
3013 | if (m == MATCH_NO) | |
e69afb29 | 3014 | { |
8c6a85e3 TB |
3015 | m = gfc_match_char (')'); |
3016 | if (m == MATCH_YES) | |
3017 | goto done; | |
3018 | goto syntax; | |
e69afb29 | 3019 | } |
8c6a85e3 | 3020 | } |
e69afb29 | 3021 | |
8c6a85e3 TB |
3022 | for (;;) |
3023 | { | |
3024 | m = gfc_match (" stat = %v", &tmp); | |
3025 | if (m == MATCH_ERROR) | |
3026 | goto syntax; | |
3027 | if (m == MATCH_YES) | |
8234e5e0 | 3028 | { |
8c6a85e3 | 3029 | if (saw_stat) |
8234e5e0 | 3030 | { |
8c6a85e3 | 3031 | gfc_error ("Redundant STAT tag found at %L ", &tmp->where); |
8234e5e0 SK |
3032 | goto cleanup; |
3033 | } | |
8c6a85e3 TB |
3034 | stat = tmp; |
3035 | saw_stat = true; | |
8234e5e0 | 3036 | |
8c6a85e3 TB |
3037 | if (gfc_match_char (',') == MATCH_YES) |
3038 | continue; | |
3039 | ||
3040 | tmp = NULL; | |
3041 | break; | |
3042 | } | |
3043 | ||
3044 | m = gfc_match (" errmsg = %v", &tmp); | |
3045 | if (m == MATCH_ERROR) | |
3046 | goto syntax; | |
3047 | if (m == MATCH_YES) | |
3048 | { | |
3049 | if (saw_errmsg) | |
8234e5e0 | 3050 | { |
8c6a85e3 | 3051 | gfc_error ("Redundant ERRMSG tag found at %L ", &tmp->where); |
8234e5e0 SK |
3052 | goto cleanup; |
3053 | } | |
8c6a85e3 TB |
3054 | errmsg = tmp; |
3055 | saw_errmsg = true; | |
8234e5e0 | 3056 | |
8c6a85e3 TB |
3057 | if (gfc_match_char (',') == MATCH_YES) |
3058 | continue; | |
3e978d30 | 3059 | |
8c6a85e3 TB |
3060 | tmp = NULL; |
3061 | break; | |
d59b1dcb DF |
3062 | } |
3063 | ||
6de9cd9a | 3064 | break; |
8c6a85e3 | 3065 | } |
6de9cd9a | 3066 | |
8c6a85e3 TB |
3067 | if (gfc_match (" )%t") != MATCH_YES) |
3068 | goto syntax; | |
3759634f | 3069 | |
8c6a85e3 TB |
3070 | done: |
3071 | switch (st) | |
3072 | { | |
3073 | case ST_SYNC_ALL: | |
3074 | new_st.op = EXEC_SYNC_ALL; | |
3075 | break; | |
3076 | case ST_SYNC_IMAGES: | |
3077 | new_st.op = EXEC_SYNC_IMAGES; | |
3078 | break; | |
3079 | case ST_SYNC_MEMORY: | |
3080 | new_st.op = EXEC_SYNC_MEMORY; | |
3081 | break; | |
3082 | default: | |
3083 | gcc_unreachable (); | |
3084 | } | |
3759634f | 3085 | |
8c6a85e3 TB |
3086 | new_st.expr1 = imageset; |
3087 | new_st.expr2 = stat; | |
3088 | new_st.expr3 = errmsg; | |
3759634f | 3089 | |
8c6a85e3 | 3090 | return MATCH_YES; |
3759634f | 3091 | |
8c6a85e3 TB |
3092 | syntax: |
3093 | gfc_syntax_error (st); | |
8234e5e0 | 3094 | |
8c6a85e3 | 3095 | cleanup: |
fd2805e1 TB |
3096 | if (stat != tmp) |
3097 | gfc_free_expr (stat); | |
3098 | if (errmsg != tmp) | |
3099 | gfc_free_expr (errmsg); | |
3100 | ||
8c6a85e3 TB |
3101 | gfc_free_expr (tmp); |
3102 | gfc_free_expr (imageset); | |
8234e5e0 | 3103 | |
8c6a85e3 TB |
3104 | return MATCH_ERROR; |
3105 | } | |
8234e5e0 | 3106 | |
8234e5e0 | 3107 | |
8c6a85e3 | 3108 | /* Match SYNC ALL statement. */ |
8234e5e0 | 3109 | |
8c6a85e3 TB |
3110 | match |
3111 | gfc_match_sync_all (void) | |
3112 | { | |
3113 | return sync_statement (ST_SYNC_ALL); | |
3114 | } | |
8234e5e0 | 3115 | |
94bff632 | 3116 | |
8c6a85e3 | 3117 | /* Match SYNC IMAGES statement. */ |
94bff632 | 3118 | |
8c6a85e3 TB |
3119 | match |
3120 | gfc_match_sync_images (void) | |
3121 | { | |
3122 | return sync_statement (ST_SYNC_IMAGES); | |
3123 | } | |
94bff632 | 3124 | |
94bff632 | 3125 | |
8c6a85e3 | 3126 | /* Match SYNC MEMORY statement. */ |
3759634f | 3127 | |
8c6a85e3 TB |
3128 | match |
3129 | gfc_match_sync_memory (void) | |
3130 | { | |
3131 | return sync_statement (ST_SYNC_MEMORY); | |
3132 | } | |
6de9cd9a | 3133 | |
6de9cd9a | 3134 | |
8c6a85e3 | 3135 | /* Match a CONTINUE statement. */ |
e69afb29 | 3136 | |
8c6a85e3 TB |
3137 | match |
3138 | gfc_match_continue (void) | |
3139 | { | |
3140 | if (gfc_match_eos () != MATCH_YES) | |
e69afb29 | 3141 | { |
8c6a85e3 TB |
3142 | gfc_syntax_error (ST_CONTINUE); |
3143 | return MATCH_ERROR; | |
e69afb29 | 3144 | } |
6de9cd9a | 3145 | |
8c6a85e3 | 3146 | new_st.op = EXEC_CONTINUE; |
6de9cd9a | 3147 | return MATCH_YES; |
6de9cd9a DN |
3148 | } |
3149 | ||
3150 | ||
8c6a85e3 | 3151 | /* Match the (deprecated) ASSIGN statement. */ |
6de9cd9a DN |
3152 | |
3153 | match | |
8c6a85e3 | 3154 | gfc_match_assign (void) |
6de9cd9a | 3155 | { |
8c6a85e3 TB |
3156 | gfc_expr *expr; |
3157 | gfc_st_label *label; | |
6de9cd9a | 3158 | |
8c6a85e3 | 3159 | if (gfc_match (" %l", &label) == MATCH_YES) |
6de9cd9a | 3160 | { |
524af0d6 | 3161 | if (!gfc_reference_st_label (label, ST_LABEL_UNKNOWN)) |
8c6a85e3 TB |
3162 | return MATCH_ERROR; |
3163 | if (gfc_match (" to %v%t", &expr) == MATCH_YES) | |
5aacb11e | 3164 | { |
524af0d6 | 3165 | if (!gfc_notify_std (GFC_STD_F95_DEL, "ASSIGN statement at %C")) |
8c6a85e3 | 3166 | return MATCH_ERROR; |
5aacb11e | 3167 | |
8c6a85e3 | 3168 | expr->symtree->n.sym->attr.assign = 1; |
6de9cd9a | 3169 | |
8c6a85e3 TB |
3170 | new_st.op = EXEC_LABEL_ASSIGN; |
3171 | new_st.label1 = label; | |
3172 | new_st.expr1 = expr; | |
3173 | return MATCH_YES; | |
6de9cd9a | 3174 | } |
6de9cd9a | 3175 | } |
8c6a85e3 | 3176 | return MATCH_NO; |
6de9cd9a DN |
3177 | } |
3178 | ||
3179 | ||
8c6a85e3 TB |
3180 | /* Match the GO TO statement. As a computed GOTO statement is |
3181 | matched, it is transformed into an equivalent SELECT block. No | |
3182 | tree is necessary, and the resulting jumps-to-jumps are | |
3183 | specifically optimized away by the back end. */ | |
6de9cd9a DN |
3184 | |
3185 | match | |
8c6a85e3 | 3186 | gfc_match_goto (void) |
6de9cd9a | 3187 | { |
8c6a85e3 TB |
3188 | gfc_code *head, *tail; |
3189 | gfc_expr *expr; | |
3190 | gfc_case *cp; | |
3191 | gfc_st_label *label; | |
3192 | int i; | |
6de9cd9a | 3193 | match m; |
6de9cd9a | 3194 | |
8c6a85e3 | 3195 | if (gfc_match (" %l%t", &label) == MATCH_YES) |
6de9cd9a | 3196 | { |
524af0d6 | 3197 | if (!gfc_reference_st_label (label, ST_LABEL_TARGET)) |
8c6a85e3 | 3198 | return MATCH_ERROR; |
6de9cd9a | 3199 | |
8c6a85e3 TB |
3200 | new_st.op = EXEC_GOTO; |
3201 | new_st.label1 = label; | |
3202 | return MATCH_YES; | |
3203 | } | |
6de9cd9a | 3204 | |
8b704316 | 3205 | /* The assigned GO TO statement. */ |
c9583ed2 | 3206 | |
8c6a85e3 TB |
3207 | if (gfc_match_variable (&expr, 0) == MATCH_YES) |
3208 | { | |
524af0d6 | 3209 | if (!gfc_notify_std (GFC_STD_F95_DEL, "Assigned GOTO statement at %C")) |
8c6a85e3 | 3210 | return MATCH_ERROR; |
cf2b3c22 | 3211 | |
8c6a85e3 TB |
3212 | new_st.op = EXEC_GOTO; |
3213 | new_st.expr1 = expr; | |
3759634f | 3214 | |
8c6a85e3 TB |
3215 | if (gfc_match_eos () == MATCH_YES) |
3216 | return MATCH_YES; | |
f1f39033 | 3217 | |
8c6a85e3 TB |
3218 | /* Match label list. */ |
3219 | gfc_match_char (','); | |
3220 | if (gfc_match_char ('(') != MATCH_YES) | |
3759634f | 3221 | { |
8c6a85e3 TB |
3222 | gfc_syntax_error (ST_GOTO); |
3223 | return MATCH_ERROR; | |
6de9cd9a | 3224 | } |
8c6a85e3 | 3225 | head = tail = NULL; |
6de9cd9a | 3226 | |
8c6a85e3 TB |
3227 | do |
3228 | { | |
3229 | m = gfc_match_st_label (&label); | |
3230 | if (m != MATCH_YES) | |
3231 | goto syntax; | |
6de9cd9a | 3232 | |
524af0d6 | 3233 | if (!gfc_reference_st_label (label, ST_LABEL_TARGET)) |
8c6a85e3 | 3234 | goto cleanup; |
3759634f | 3235 | |
8c6a85e3 | 3236 | if (head == NULL) |
11e5274a | 3237 | head = tail = gfc_get_code (EXEC_GOTO); |
8c6a85e3 | 3238 | else |
3759634f | 3239 | { |
11e5274a | 3240 | tail->block = gfc_get_code (EXEC_GOTO); |
8c6a85e3 | 3241 | tail = tail->block; |
3759634f SK |
3242 | } |
3243 | ||
8c6a85e3 | 3244 | tail->label1 = label; |
8c6a85e3 TB |
3245 | } |
3246 | while (gfc_match_char (',') == MATCH_YES); | |
3759634f | 3247 | |
8c6a85e3 TB |
3248 | if (gfc_match (")%t") != MATCH_YES) |
3249 | goto syntax; | |
6de9cd9a | 3250 | |
8c6a85e3 TB |
3251 | if (head == NULL) |
3252 | { | |
3253 | gfc_error ("Statement label list in GOTO at %C cannot be empty"); | |
3254 | goto syntax; | |
3759634f | 3255 | } |
8c6a85e3 | 3256 | new_st.block = head; |
3759634f | 3257 | |
8c6a85e3 TB |
3258 | return MATCH_YES; |
3259 | } | |
3759634f | 3260 | |
8c6a85e3 TB |
3261 | /* Last chance is a computed GO TO statement. */ |
3262 | if (gfc_match_char ('(') != MATCH_YES) | |
3263 | { | |
3264 | gfc_syntax_error (ST_GOTO); | |
3265 | return MATCH_ERROR; | |
3266 | } | |
3759634f | 3267 | |
8c6a85e3 TB |
3268 | head = tail = NULL; |
3269 | i = 1; | |
3759634f | 3270 | |
8c6a85e3 TB |
3271 | do |
3272 | { | |
3273 | m = gfc_match_st_label (&label); | |
3274 | if (m != MATCH_YES) | |
3275 | goto syntax; | |
3276 | ||
524af0d6 | 3277 | if (!gfc_reference_st_label (label, ST_LABEL_TARGET)) |
8c6a85e3 TB |
3278 | goto cleanup; |
3279 | ||
3280 | if (head == NULL) | |
11e5274a | 3281 | head = tail = gfc_get_code (EXEC_SELECT); |
8c6a85e3 TB |
3282 | else |
3283 | { | |
11e5274a | 3284 | tail->block = gfc_get_code (EXEC_SELECT); |
8c6a85e3 | 3285 | tail = tail->block; |
3759634f SK |
3286 | } |
3287 | ||
8c6a85e3 TB |
3288 | cp = gfc_get_case (); |
3289 | cp->low = cp->high = gfc_get_int_expr (gfc_default_integer_kind, | |
3290 | NULL, i++); | |
3759634f | 3291 | |
8c6a85e3 TB |
3292 | tail->ext.block.case_list = cp; |
3293 | ||
11e5274a | 3294 | tail->next = gfc_get_code (EXEC_GOTO); |
8c6a85e3 | 3295 | tail->next->label1 = label; |
3759634f | 3296 | } |
8c6a85e3 | 3297 | while (gfc_match_char (',') == MATCH_YES); |
6de9cd9a | 3298 | |
8c6a85e3 | 3299 | if (gfc_match_char (')') != MATCH_YES) |
6de9cd9a DN |
3300 | goto syntax; |
3301 | ||
8c6a85e3 TB |
3302 | if (head == NULL) |
3303 | { | |
3304 | gfc_error ("Statement label list in GOTO at %C cannot be empty"); | |
3305 | goto syntax; | |
3306 | } | |
6de9cd9a | 3307 | |
8c6a85e3 TB |
3308 | /* Get the rest of the statement. */ |
3309 | gfc_match_char (','); | |
6de9cd9a | 3310 | |
8c6a85e3 TB |
3311 | if (gfc_match (" %e%t", &expr) != MATCH_YES) |
3312 | goto syntax; | |
6de9cd9a | 3313 | |
524af0d6 | 3314 | if (!gfc_notify_std (GFC_STD_F95_OBS, "Computed GOTO at %C")) |
e2ab8b09 JW |
3315 | return MATCH_ERROR; |
3316 | ||
8c6a85e3 TB |
3317 | /* At this point, a computed GOTO has been fully matched and an |
3318 | equivalent SELECT statement constructed. */ | |
7f42f27f | 3319 | |
8c6a85e3 TB |
3320 | new_st.op = EXEC_SELECT; |
3321 | new_st.expr1 = NULL; | |
6de9cd9a | 3322 | |
8c6a85e3 TB |
3323 | /* Hack: For a "real" SELECT, the expression is in expr. We put |
3324 | it in expr2 so we can distinguish then and produce the correct | |
3325 | diagnostics. */ | |
3326 | new_st.expr2 = expr; | |
3327 | new_st.block = head; | |
3328 | return MATCH_YES; | |
6de9cd9a | 3329 | |
8c6a85e3 TB |
3330 | syntax: |
3331 | gfc_syntax_error (ST_GOTO); | |
6de9cd9a | 3332 | cleanup: |
8c6a85e3 | 3333 | gfc_free_statements (head); |
6de9cd9a | 3334 | return MATCH_ERROR; |
6de9cd9a DN |
3335 | } |
3336 | ||
3337 | ||
8c6a85e3 | 3338 | /* Frees a list of gfc_alloc structures. */ |
8e1f752a | 3339 | |
8c6a85e3 TB |
3340 | void |
3341 | gfc_free_alloc_list (gfc_alloc *p) | |
8e1f752a | 3342 | { |
8c6a85e3 | 3343 | gfc_alloc *q; |
8e1f752a | 3344 | |
8c6a85e3 | 3345 | for (; p; p = q) |
8e1f752a | 3346 | { |
8c6a85e3 TB |
3347 | q = p->next; |
3348 | gfc_free_expr (p->expr); | |
3349 | free (p); | |
8e1f752a | 3350 | } |
8e1f752a DK |
3351 | } |
3352 | ||
3353 | ||
8c6a85e3 | 3354 | /* Match an ALLOCATE statement. */ |
6de9cd9a DN |
3355 | |
3356 | match | |
8c6a85e3 | 3357 | gfc_match_allocate (void) |
6de9cd9a | 3358 | { |
8c6a85e3 TB |
3359 | gfc_alloc *head, *tail; |
3360 | gfc_expr *stat, *errmsg, *tmp, *source, *mold; | |
3361 | gfc_typespec ts; | |
6de9cd9a | 3362 | gfc_symbol *sym; |
6de9cd9a | 3363 | match m; |
8c6a85e3 TB |
3364 | locus old_locus, deferred_locus; |
3365 | bool saw_stat, saw_errmsg, saw_source, saw_mold, saw_deferred, b1, b2, b3; | |
8b704316 | 3366 | bool saw_unlimited = false; |
6de9cd9a | 3367 | |
8c6a85e3 TB |
3368 | head = tail = NULL; |
3369 | stat = errmsg = source = mold = tmp = NULL; | |
3370 | saw_stat = saw_errmsg = saw_source = saw_mold = saw_deferred = false; | |
6de9cd9a | 3371 | |
8c6a85e3 | 3372 | if (gfc_match_char ('(') != MATCH_YES) |
6de9cd9a | 3373 | goto syntax; |
6de9cd9a | 3374 | |
8c6a85e3 TB |
3375 | /* Match an optional type-spec. */ |
3376 | old_locus = gfc_current_locus; | |
894460a7 | 3377 | m = gfc_match_type_spec (&ts); |
8c6a85e3 TB |
3378 | if (m == MATCH_ERROR) |
3379 | goto cleanup; | |
3380 | else if (m == MATCH_NO) | |
3381 | { | |
3382 | char name[GFC_MAX_SYMBOL_LEN + 3]; | |
6de9cd9a | 3383 | |
8c6a85e3 TB |
3384 | if (gfc_match ("%n :: ", name) == MATCH_YES) |
3385 | { | |
3386 | gfc_error ("Error in type-spec at %L", &old_locus); | |
3387 | goto cleanup; | |
3388 | } | |
8e1f752a | 3389 | |
8c6a85e3 TB |
3390 | ts.type = BT_UNKNOWN; |
3391 | } | |
3392 | else | |
6291f3ba | 3393 | { |
8c6a85e3 | 3394 | if (gfc_match (" :: ") == MATCH_YES) |
eda0ed25 | 3395 | { |
524af0d6 JB |
3396 | if (!gfc_notify_std (GFC_STD_F2003, "typespec in ALLOCATE at %L", |
3397 | &old_locus)) | |
8c6a85e3 | 3398 | goto cleanup; |
6de9cd9a | 3399 | |
8c6a85e3 TB |
3400 | if (ts.deferred) |
3401 | { | |
3402 | gfc_error ("Type-spec at %L cannot contain a deferred " | |
3403 | "type parameter", &old_locus); | |
3404 | goto cleanup; | |
3405 | } | |
239b48db TB |
3406 | |
3407 | if (ts.type == BT_CHARACTER) | |
3408 | ts.u.cl->length_from_typespec = true; | |
8c6a85e3 TB |
3409 | } |
3410 | else | |
3411 | { | |
3412 | ts.type = BT_UNKNOWN; | |
3413 | gfc_current_locus = old_locus; | |
eda0ed25 | 3414 | } |
6291f3ba | 3415 | } |
8de10a62 | 3416 | |
8c6a85e3 | 3417 | for (;;) |
6de9cd9a | 3418 | { |
8c6a85e3 TB |
3419 | if (head == NULL) |
3420 | head = tail = gfc_get_alloc (); | |
3421 | else | |
3422 | { | |
3423 | tail->next = gfc_get_alloc (); | |
3424 | tail = tail->next; | |
3425 | } | |
3426 | ||
3427 | m = gfc_match_variable (&tail->expr, 0); | |
6de9cd9a DN |
3428 | if (m == MATCH_NO) |
3429 | goto syntax; | |
3430 | if (m == MATCH_ERROR) | |
3431 | goto cleanup; | |
3432 | ||
8c6a85e3 TB |
3433 | if (gfc_check_do_variable (tail->expr->symtree)) |
3434 | goto cleanup; | |
6de9cd9a | 3435 | |
ccd7751b TB |
3436 | bool impure = gfc_impure_variable (tail->expr->symtree->n.sym); |
3437 | if (impure && gfc_pure (NULL)) | |
8c6a85e3 TB |
3438 | { |
3439 | gfc_error ("Bad allocate-object at %C for a PURE procedure"); | |
3440 | goto cleanup; | |
3441 | } | |
6de9cd9a | 3442 | |
ccd7751b TB |
3443 | if (impure) |
3444 | gfc_unset_implicit_pure (NULL); | |
6de9cd9a | 3445 | |
8c6a85e3 TB |
3446 | if (tail->expr->ts.deferred) |
3447 | { | |
3448 | saw_deferred = true; | |
3449 | deferred_locus = tail->expr->where; | |
3450 | } | |
6de9cd9a | 3451 | |
524af0d6 JB |
3452 | if (gfc_find_state (COMP_DO_CONCURRENT) |
3453 | || gfc_find_state (COMP_CRITICAL)) | |
8c6a85e3 TB |
3454 | { |
3455 | gfc_ref *ref; | |
3456 | bool coarray = tail->expr->symtree->n.sym->attr.codimension; | |
3457 | for (ref = tail->expr->ref; ref; ref = ref->next) | |
3458 | if (ref->type == REF_COMPONENT) | |
3459 | coarray = ref->u.c.component->attr.codimension; | |
6de9cd9a | 3460 | |
524af0d6 | 3461 | if (coarray && gfc_find_state (COMP_DO_CONCURRENT)) |
8c6a85e3 TB |
3462 | { |
3463 | gfc_error ("ALLOCATE of coarray at %C in DO CONCURRENT block"); | |
3464 | goto cleanup; | |
3465 | } | |
524af0d6 | 3466 | if (coarray && gfc_find_state (COMP_CRITICAL)) |
8c6a85e3 TB |
3467 | { |
3468 | gfc_error ("ALLOCATE of coarray at %C in CRITICAL block"); | |
3469 | goto cleanup; | |
3470 | } | |
3471 | } | |
6de9cd9a | 3472 | |
98cf47d1 JW |
3473 | /* Check for F08:C628. */ |
3474 | sym = tail->expr->symtree->n.sym; | |
3475 | b1 = !(tail->expr->ref | |
3476 | && (tail->expr->ref->type == REF_COMPONENT | |
3477 | || tail->expr->ref->type == REF_ARRAY)); | |
3478 | if (sym && sym->ts.type == BT_CLASS && sym->attr.class_ok) | |
3479 | b2 = !(CLASS_DATA (sym)->attr.allocatable | |
3480 | || CLASS_DATA (sym)->attr.class_pointer); | |
3481 | else | |
3482 | b2 = sym && !(sym->attr.allocatable || sym->attr.pointer | |
3483 | || sym->attr.proc_pointer); | |
3484 | b3 = sym && sym->ns && sym->ns->proc_name | |
3485 | && (sym->ns->proc_name->attr.allocatable | |
3486 | || sym->ns->proc_name->attr.pointer | |
3487 | || sym->ns->proc_name->attr.proc_pointer); | |
3488 | if (b1 && b2 && !b3) | |
3489 | { | |
3490 | gfc_error ("Allocate-object at %L is neither a data pointer " | |
3491 | "nor an allocatable variable", &tail->expr->where); | |
3492 | goto cleanup; | |
3493 | } | |
3494 | ||
8c6a85e3 TB |
3495 | /* The ALLOCATE statement had an optional typespec. Check the |
3496 | constraints. */ | |
3497 | if (ts.type != BT_UNKNOWN) | |
6de9cd9a | 3498 | { |
8c6a85e3 TB |
3499 | /* Enforce F03:C624. */ |
3500 | if (!gfc_type_compatible (&tail->expr->ts, &ts)) | |
3501 | { | |
3502 | gfc_error ("Type of entity at %L is type incompatible with " | |
3503 | "typespec", &tail->expr->where); | |
3504 | goto cleanup; | |
3505 | } | |
6de9cd9a | 3506 | |
8c6a85e3 | 3507 | /* Enforce F03:C627. */ |
8b704316 | 3508 | if (ts.kind != tail->expr->ts.kind && !UNLIMITED_POLY (tail->expr)) |
8c6a85e3 TB |
3509 | { |
3510 | gfc_error ("Kind type parameter for entity at %L differs from " | |
3511 | "the kind type parameter of the typespec", | |
3512 | &tail->expr->where); | |
3513 | goto cleanup; | |
3514 | } | |
3515 | } | |
6de9cd9a | 3516 | |
8c6a85e3 TB |
3517 | if (tail->expr->ts.type == BT_DERIVED) |
3518 | tail->expr->ts.u.derived = gfc_use_derived (tail->expr->ts.u.derived); | |
6de9cd9a | 3519 | |
8b704316 PT |
3520 | saw_unlimited = saw_unlimited | UNLIMITED_POLY (tail->expr); |
3521 | ||
8c6a85e3 TB |
3522 | if (gfc_peek_ascii_char () == '(' && !sym->attr.dimension) |
3523 | { | |
3524 | gfc_error ("Shape specification for allocatable scalar at %C"); | |
3525 | goto cleanup; | |
3526 | } | |
6de9cd9a | 3527 | |
8c6a85e3 TB |
3528 | if (gfc_match_char (',') != MATCH_YES) |
3529 | break; | |
3530 | ||
3531 | alloc_opt_list: | |
3532 | ||
3533 | m = gfc_match (" stat = %v", &tmp); | |
3534 | if (m == MATCH_ERROR) | |
3535 | goto cleanup; | |
3536 | if (m == MATCH_YES) | |
3537 | { | |
3538 | /* Enforce C630. */ | |
3539 | if (saw_stat) | |
3540 | { | |
3541 | gfc_error ("Redundant STAT tag found at %L ", &tmp->where); | |
3542 | goto cleanup; | |
3543 | } | |
3544 | ||
3545 | stat = tmp; | |
3546 | tmp = NULL; | |
3547 | saw_stat = true; | |
3548 | ||
3549 | if (gfc_check_do_variable (stat->symtree)) | |
3550 | goto cleanup; | |
3551 | ||
3552 | if (gfc_match_char (',') == MATCH_YES) | |
3553 | goto alloc_opt_list; | |
3554 | } | |
3555 | ||
3556 | m = gfc_match (" errmsg = %v", &tmp); | |
3557 | if (m == MATCH_ERROR) | |
3558 | goto cleanup; | |
3559 | if (m == MATCH_YES) | |
3560 | { | |
524af0d6 | 3561 | if (!gfc_notify_std (GFC_STD_F2003, "ERRMSG tag at %L", &tmp->where)) |
8c6a85e3 TB |
3562 | goto cleanup; |
3563 | ||
3564 | /* Enforce C630. */ | |
3565 | if (saw_errmsg) | |
3566 | { | |
3567 | gfc_error ("Redundant ERRMSG tag found at %L ", &tmp->where); | |
3568 | goto cleanup; | |
3569 | } | |
3570 | ||
3571 | errmsg = tmp; | |
3572 | tmp = NULL; | |
3573 | saw_errmsg = true; | |
3574 | ||
3575 | if (gfc_match_char (',') == MATCH_YES) | |
3576 | goto alloc_opt_list; | |
3577 | } | |
3578 | ||
3579 | m = gfc_match (" source = %e", &tmp); | |
3580 | if (m == MATCH_ERROR) | |
3581 | goto cleanup; | |
3582 | if (m == MATCH_YES) | |
3583 | { | |
524af0d6 | 3584 | if (!gfc_notify_std (GFC_STD_F2003, "SOURCE tag at %L", &tmp->where)) |
8c6a85e3 TB |
3585 | goto cleanup; |
3586 | ||
3587 | /* Enforce C630. */ | |
3588 | if (saw_source) | |
3589 | { | |
3590 | gfc_error ("Redundant SOURCE tag found at %L ", &tmp->where); | |
3591 | goto cleanup; | |
3592 | } | |
3593 | ||
3594 | /* The next 2 conditionals check C631. */ | |
3595 | if (ts.type != BT_UNKNOWN) | |
3596 | { | |
fea70c99 | 3597 | gfc_error ("SOURCE tag at %L conflicts with the typespec at %L", |
8c6a85e3 TB |
3598 | &tmp->where, &old_locus); |
3599 | goto cleanup; | |
3600 | } | |
3601 | ||
4cb2a867 | 3602 | if (head->next |
524af0d6 JB |
3603 | && !gfc_notify_std (GFC_STD_F2008, "SOURCE tag at %L" |
3604 | " with more than a single allocate object", | |
3605 | &tmp->where)) | |
4cb2a867 | 3606 | goto cleanup; |
8c6a85e3 TB |
3607 | |
3608 | source = tmp; | |
3609 | tmp = NULL; | |
3610 | saw_source = true; | |
3611 | ||
3612 | if (gfc_match_char (',') == MATCH_YES) | |
3613 | goto alloc_opt_list; | |
6de9cd9a | 3614 | } |
8c6a85e3 TB |
3615 | |
3616 | m = gfc_match (" mold = %e", &tmp); | |
3617 | if (m == MATCH_ERROR) | |
3618 | goto cleanup; | |
3619 | if (m == MATCH_YES) | |
3620 | { | |
524af0d6 | 3621 | if (!gfc_notify_std (GFC_STD_F2008, "MOLD tag at %L", &tmp->where)) |
8c6a85e3 TB |
3622 | goto cleanup; |
3623 | ||
3624 | /* Check F08:C636. */ | |
3625 | if (saw_mold) | |
3626 | { | |
3627 | gfc_error ("Redundant MOLD tag found at %L ", &tmp->where); | |
3628 | goto cleanup; | |
3629 | } | |
8b704316 | 3630 | |
8c6a85e3 TB |
3631 | /* Check F08:C637. */ |
3632 | if (ts.type != BT_UNKNOWN) | |
3633 | { | |
fea70c99 | 3634 | gfc_error ("MOLD tag at %L conflicts with the typespec at %L", |
8c6a85e3 TB |
3635 | &tmp->where, &old_locus); |
3636 | goto cleanup; | |
3637 | } | |
3638 | ||
3639 | mold = tmp; | |
3640 | tmp = NULL; | |
3641 | saw_mold = true; | |
3642 | mold->mold = 1; | |
3643 | ||
3644 | if (gfc_match_char (',') == MATCH_YES) | |
3645 | goto alloc_opt_list; | |
3646 | } | |
3647 | ||
3648 | gfc_gobble_whitespace (); | |
3649 | ||
3650 | if (gfc_peek_char () == ')') | |
3651 | break; | |
6de9cd9a DN |
3652 | } |
3653 | ||
8c6a85e3 TB |
3654 | if (gfc_match (" )%t") != MATCH_YES) |
3655 | goto syntax; | |
3656 | ||
3657 | /* Check F08:C637. */ | |
3658 | if (source && mold) | |
3659 | { | |
fea70c99 MLI |
3660 | gfc_error ("MOLD tag at %L conflicts with SOURCE tag at %L", |
3661 | &mold->where, &source->where); | |
8c6a85e3 TB |
3662 | goto cleanup; |
3663 | } | |
3664 | ||
3665 | /* Check F03:C623, */ | |
3666 | if (saw_deferred && ts.type == BT_UNKNOWN && !source && !mold) | |
3667 | { | |
3668 | gfc_error ("Allocate-object at %L with a deferred type parameter " | |
3669 | "requires either a type-spec or SOURCE tag or a MOLD tag", | |
3670 | &deferred_locus); | |
3671 | goto cleanup; | |
3672 | } | |
8b704316 PT |
3673 | |
3674 | /* Check F03:C625, */ | |
3675 | if (saw_unlimited && ts.type == BT_UNKNOWN && !source && !mold) | |
3676 | { | |
3677 | for (tail = head; tail; tail = tail->next) | |
3678 | { | |
3679 | if (UNLIMITED_POLY (tail->expr)) | |
3680 | gfc_error ("Unlimited polymorphic allocate-object at %L " | |
3681 | "requires either a type-spec or SOURCE tag " | |
3682 | "or a MOLD tag", &tail->expr->where); | |
3683 | } | |
3684 | goto cleanup; | |
3685 | } | |
3686 | ||
8c6a85e3 TB |
3687 | new_st.op = EXEC_ALLOCATE; |
3688 | new_st.expr1 = stat; | |
3689 | new_st.expr2 = errmsg; | |
3690 | if (source) | |
3691 | new_st.expr3 = source; | |
3692 | else | |
3693 | new_st.expr3 = mold; | |
3694 | new_st.ext.alloc.list = head; | |
3695 | new_st.ext.alloc.ts = ts; | |
6de9cd9a DN |
3696 | |
3697 | return MATCH_YES; | |
3698 | ||
3699 | syntax: | |
8c6a85e3 | 3700 | gfc_syntax_error (ST_ALLOCATE); |
6de9cd9a DN |
3701 | |
3702 | cleanup: | |
8c6a85e3 TB |
3703 | gfc_free_expr (errmsg); |
3704 | gfc_free_expr (source); | |
3705 | gfc_free_expr (stat); | |
3706 | gfc_free_expr (mold); | |
3707 | if (tmp && tmp->expr_type) gfc_free_expr (tmp); | |
3708 | gfc_free_alloc_list (head); | |
6de9cd9a DN |
3709 | return MATCH_ERROR; |
3710 | } | |
3711 | ||
3712 | ||
8c6a85e3 TB |
3713 | /* Match a NULLIFY statement. A NULLIFY statement is transformed into |
3714 | a set of pointer assignments to intrinsic NULL(). */ | |
9056bd70 | 3715 | |
8c6a85e3 TB |
3716 | match |
3717 | gfc_match_nullify (void) | |
9056bd70 | 3718 | { |
8c6a85e3 TB |
3719 | gfc_code *tail; |
3720 | gfc_expr *e, *p; | |
3721 | match m; | |
9056bd70 | 3722 | |
8c6a85e3 | 3723 | tail = NULL; |
53814b8f | 3724 | |
8c6a85e3 TB |
3725 | if (gfc_match_char ('(') != MATCH_YES) |
3726 | goto syntax; | |
9056bd70 | 3727 | |
8c6a85e3 | 3728 | for (;;) |
9056bd70 | 3729 | { |
8c6a85e3 TB |
3730 | m = gfc_match_variable (&p, 0); |
3731 | if (m == MATCH_ERROR) | |
3732 | goto cleanup; | |
3733 | if (m == MATCH_NO) | |
3734 | goto syntax; | |
3735 | ||
3736 | if (gfc_check_do_variable (p->symtree)) | |
3737 | goto cleanup; | |
3738 | ||
3739 | /* F2008, C1242. */ | |
3740 | if (gfc_is_coindexed (p)) | |
3741 | { | |
0c133211 | 3742 | gfc_error ("Pointer object at %C shall not be coindexed"); |
8c6a85e3 TB |
3743 | goto cleanup; |
3744 | } | |
3745 | ||
3746 | /* build ' => NULL() '. */ | |
3747 | e = gfc_get_null_expr (&gfc_current_locus); | |
3748 | ||
3749 | /* Chain to list. */ | |
3750 | if (tail == NULL) | |
11e5274a JW |
3751 | { |
3752 | tail = &new_st; | |
3753 | tail->op = EXEC_POINTER_ASSIGN; | |
3754 | } | |
8c6a85e3 TB |
3755 | else |
3756 | { | |
11e5274a | 3757 | tail->next = gfc_get_code (EXEC_POINTER_ASSIGN); |
8c6a85e3 TB |
3758 | tail = tail->next; |
3759 | } | |
3760 | ||
8c6a85e3 TB |
3761 | tail->expr1 = p; |
3762 | tail->expr2 = e; | |
3763 | ||
3764 | if (gfc_match (" )%t") == MATCH_YES) | |
3765 | break; | |
3766 | if (gfc_match_char (',') != MATCH_YES) | |
3767 | goto syntax; | |
9056bd70 TS |
3768 | } |
3769 | ||
8c6a85e3 TB |
3770 | return MATCH_YES; |
3771 | ||
3772 | syntax: | |
3773 | gfc_syntax_error (ST_NULLIFY); | |
3774 | ||
3775 | cleanup: | |
3776 | gfc_free_statements (new_st.next); | |
3777 | new_st.next = NULL; | |
3778 | gfc_free_expr (new_st.expr1); | |
3779 | new_st.expr1 = NULL; | |
3780 | gfc_free_expr (new_st.expr2); | |
3781 | new_st.expr2 = NULL; | |
3782 | return MATCH_ERROR; | |
9056bd70 TS |
3783 | } |
3784 | ||
3785 | ||
8c6a85e3 | 3786 | /* Match a DEALLOCATE statement. */ |
6de9cd9a | 3787 | |
8c6a85e3 TB |
3788 | match |
3789 | gfc_match_deallocate (void) | |
6de9cd9a | 3790 | { |
8c6a85e3 TB |
3791 | gfc_alloc *head, *tail; |
3792 | gfc_expr *stat, *errmsg, *tmp; | |
3793 | gfc_symbol *sym; | |
6de9cd9a | 3794 | match m; |
8c6a85e3 | 3795 | bool saw_stat, saw_errmsg, b1, b2; |
6de9cd9a | 3796 | |
8c6a85e3 TB |
3797 | head = tail = NULL; |
3798 | stat = errmsg = tmp = NULL; | |
3799 | saw_stat = saw_errmsg = false; | |
6de9cd9a | 3800 | |
8c6a85e3 TB |
3801 | if (gfc_match_char ('(') != MATCH_YES) |
3802 | goto syntax; | |
3803 | ||
3804 | for (;;) | |
6de9cd9a | 3805 | { |
8c6a85e3 TB |
3806 | if (head == NULL) |
3807 | head = tail = gfc_get_alloc (); | |
3808 | else | |
3809 | { | |
3810 | tail->next = gfc_get_alloc (); | |
3811 | tail = tail->next; | |
3812 | } | |
3813 | ||
3814 | m = gfc_match_variable (&tail->expr, 0); | |
3815 | if (m == MATCH_ERROR) | |
3816 | goto cleanup; | |
3817 | if (m == MATCH_NO) | |
3818 | goto syntax; | |
3819 | ||
3820 | if (gfc_check_do_variable (tail->expr->symtree)) | |
3821 | goto cleanup; | |
3822 | ||
3823 | sym = tail->expr->symtree->n.sym; | |
3824 | ||
ccd7751b TB |
3825 | bool impure = gfc_impure_variable (sym); |
3826 | if (impure && gfc_pure (NULL)) | |
8c6a85e3 TB |
3827 | { |
3828 | gfc_error ("Illegal allocate-object at %C for a PURE procedure"); | |
3829 | goto cleanup; | |
3830 | } | |
3831 | ||
ccd7751b TB |
3832 | if (impure) |
3833 | gfc_unset_implicit_pure (NULL); | |
8c6a85e3 TB |
3834 | |
3835 | if (gfc_is_coarray (tail->expr) | |
524af0d6 | 3836 | && gfc_find_state (COMP_DO_CONCURRENT)) |
8c6a85e3 TB |
3837 | { |
3838 | gfc_error ("DEALLOCATE of coarray at %C in DO CONCURRENT block"); | |
3839 | goto cleanup; | |
3840 | } | |
3841 | ||
3842 | if (gfc_is_coarray (tail->expr) | |
524af0d6 | 3843 | && gfc_find_state (COMP_CRITICAL)) |
8c6a85e3 TB |
3844 | { |
3845 | gfc_error ("DEALLOCATE of coarray at %C in CRITICAL block"); | |
3846 | goto cleanup; | |
3847 | } | |
3848 | ||
3849 | /* FIXME: disable the checking on derived types. */ | |
3850 | b1 = !(tail->expr->ref | |
3851 | && (tail->expr->ref->type == REF_COMPONENT | |
3852 | || tail->expr->ref->type == REF_ARRAY)); | |
3853 | if (sym && sym->ts.type == BT_CLASS) | |
3854 | b2 = !(CLASS_DATA (sym)->attr.allocatable | |
3855 | || CLASS_DATA (sym)->attr.class_pointer); | |
3856 | else | |
3857 | b2 = sym && !(sym->attr.allocatable || sym->attr.pointer | |
3858 | || sym->attr.proc_pointer); | |
3859 | if (b1 && b2) | |
3860 | { | |
3861 | gfc_error ("Allocate-object at %C is not a nonprocedure pointer " | |
b59e9071 | 3862 | "nor an allocatable variable"); |
8c6a85e3 TB |
3863 | goto cleanup; |
3864 | } | |
3865 | ||
3866 | if (gfc_match_char (',') != MATCH_YES) | |
3867 | break; | |
3868 | ||
3869 | dealloc_opt_list: | |
3870 | ||
3871 | m = gfc_match (" stat = %v", &tmp); | |
3872 | if (m == MATCH_ERROR) | |
3873 | goto cleanup; | |
3874 | if (m == MATCH_YES) | |
3875 | { | |
3876 | if (saw_stat) | |
3877 | { | |
3878 | gfc_error ("Redundant STAT tag found at %L ", &tmp->where); | |
3879 | gfc_free_expr (tmp); | |
3880 | goto cleanup; | |
3881 | } | |
3882 | ||
3883 | stat = tmp; | |
3884 | saw_stat = true; | |
3885 | ||
3886 | if (gfc_check_do_variable (stat->symtree)) | |
3887 | goto cleanup; | |
3888 | ||
3889 | if (gfc_match_char (',') == MATCH_YES) | |
3890 | goto dealloc_opt_list; | |
3891 | } | |
3892 | ||
3893 | m = gfc_match (" errmsg = %v", &tmp); | |
3894 | if (m == MATCH_ERROR) | |
3895 | goto cleanup; | |
3896 | if (m == MATCH_YES) | |
3897 | { | |
524af0d6 | 3898 | if (!gfc_notify_std (GFC_STD_F2003, "ERRMSG at %L", &tmp->where)) |
8c6a85e3 TB |
3899 | goto cleanup; |
3900 | ||
3901 | if (saw_errmsg) | |
3902 | { | |
3903 | gfc_error ("Redundant ERRMSG tag found at %L ", &tmp->where); | |
3904 | gfc_free_expr (tmp); | |
3905 | goto cleanup; | |
3906 | } | |
3907 | ||
3908 | errmsg = tmp; | |
3909 | saw_errmsg = true; | |
3910 | ||
3911 | if (gfc_match_char (',') == MATCH_YES) | |
3912 | goto dealloc_opt_list; | |
3913 | } | |
3914 | ||
3915 | gfc_gobble_whitespace (); | |
3916 | ||
3917 | if (gfc_peek_char () == ')') | |
3918 | break; | |
6de9cd9a DN |
3919 | } |
3920 | ||
8c6a85e3 TB |
3921 | if (gfc_match (" )%t") != MATCH_YES) |
3922 | goto syntax; | |
3923 | ||
3924 | new_st.op = EXEC_DEALLOCATE; | |
3925 | new_st.expr1 = stat; | |
3926 | new_st.expr2 = errmsg; | |
3927 | new_st.ext.alloc.list = head; | |
3928 | ||
3929 | return MATCH_YES; | |
6de9cd9a | 3930 | |
8c6a85e3 TB |
3931 | syntax: |
3932 | gfc_syntax_error (ST_DEALLOCATE); | |
6de9cd9a | 3933 | |
8c6a85e3 TB |
3934 | cleanup: |
3935 | gfc_free_expr (errmsg); | |
3936 | gfc_free_expr (stat); | |
3937 | gfc_free_alloc_list (head); | |
6de9cd9a DN |
3938 | return MATCH_ERROR; |
3939 | } | |
3940 | ||
3941 | ||
8c6a85e3 | 3942 | /* Match a RETURN statement. */ |
6de9cd9a DN |
3943 | |
3944 | match | |
8c6a85e3 | 3945 | gfc_match_return (void) |
6de9cd9a | 3946 | { |
8c6a85e3 | 3947 | gfc_expr *e; |
6de9cd9a | 3948 | match m; |
8c6a85e3 | 3949 | gfc_compile_state s; |
6de9cd9a | 3950 | |
8c6a85e3 TB |
3951 | e = NULL; |
3952 | ||
524af0d6 | 3953 | if (gfc_find_state (COMP_CRITICAL)) |
6de9cd9a | 3954 | { |
8c6a85e3 TB |
3955 | gfc_error ("Image control statement RETURN at %C in CRITICAL block"); |
3956 | return MATCH_ERROR; | |
6de9cd9a DN |
3957 | } |
3958 | ||
524af0d6 | 3959 | if (gfc_find_state (COMP_DO_CONCURRENT)) |
6de9cd9a | 3960 | { |
8c6a85e3 TB |
3961 | gfc_error ("Image control statement RETURN at %C in DO CONCURRENT block"); |
3962 | return MATCH_ERROR; | |
3963 | } | |
f69ab0e0 | 3964 | |
8c6a85e3 TB |
3965 | if (gfc_match_eos () == MATCH_YES) |
3966 | goto done; | |
6de9cd9a | 3967 | |
524af0d6 | 3968 | if (!gfc_find_state (COMP_SUBROUTINE)) |
8c6a85e3 TB |
3969 | { |
3970 | gfc_error ("Alternate RETURN statement at %C is only allowed within " | |
3971 | "a SUBROUTINE"); | |
3972 | goto cleanup; | |
3973 | } | |
6de9cd9a | 3974 | |
8c6a85e3 TB |
3975 | if (gfc_current_form == FORM_FREE) |
3976 | { | |
3977 | /* The following are valid, so we can't require a blank after the | |
3978 | RETURN keyword: | |
3979 | return+1 | |
3980 | return(1) */ | |
3981 | char c = gfc_peek_ascii_char (); | |
3982 | if (ISALPHA (c) || ISDIGIT (c)) | |
3983 | return MATCH_NO; | |
3984 | } | |
6de9cd9a | 3985 | |
8c6a85e3 TB |
3986 | m = gfc_match (" %e%t", &e); |
3987 | if (m == MATCH_YES) | |
3988 | goto done; | |
3989 | if (m == MATCH_ERROR) | |
3990 | goto cleanup; | |
6de9cd9a | 3991 | |
8c6a85e3 | 3992 | gfc_syntax_error (ST_RETURN); |
6de9cd9a | 3993 | |
8c6a85e3 TB |
3994 | cleanup: |
3995 | gfc_free_expr (e); | |
3996 | return MATCH_ERROR; | |
6de9cd9a | 3997 | |
8c6a85e3 TB |
3998 | done: |
3999 | gfc_enclosing_unit (&s); | |
4000 | if (s == COMP_PROGRAM | |
524af0d6 JB |
4001 | && !gfc_notify_std (GFC_STD_GNU, "RETURN statement in " |
4002 | "main program at %C")) | |
8c6a85e3 | 4003 | return MATCH_ERROR; |
30aabb86 | 4004 | |
8c6a85e3 TB |
4005 | new_st.op = EXEC_RETURN; |
4006 | new_st.expr1 = e; | |
30aabb86 | 4007 | |
8c6a85e3 TB |
4008 | return MATCH_YES; |
4009 | } | |
30aabb86 | 4010 | |
30aabb86 | 4011 | |
8b704316 | 4012 | /* Match the call of a type-bound procedure, if CALL%var has already been |
8c6a85e3 | 4013 | matched and var found to be a derived-type variable. */ |
30aabb86 | 4014 | |
8c6a85e3 TB |
4015 | static match |
4016 | match_typebound_call (gfc_symtree* varst) | |
4017 | { | |
4018 | gfc_expr* base; | |
4019 | match m; | |
30aabb86 | 4020 | |
8c6a85e3 TB |
4021 | base = gfc_get_expr (); |
4022 | base->expr_type = EXPR_VARIABLE; | |
4023 | base->symtree = varst; | |
4024 | base->where = gfc_current_locus; | |
4025 | gfc_set_sym_referenced (varst->n.sym); | |
8b704316 | 4026 | |
8c6a85e3 TB |
4027 | m = gfc_match_varspec (base, 0, true, true); |
4028 | if (m == MATCH_NO) | |
4029 | gfc_error ("Expected component reference at %C"); | |
4030 | if (m != MATCH_YES) | |
36abe895 TB |
4031 | { |
4032 | gfc_free_expr (base); | |
4033 | return MATCH_ERROR; | |
4034 | } | |
6de9cd9a | 4035 | |
8c6a85e3 TB |
4036 | if (gfc_match_eos () != MATCH_YES) |
4037 | { | |
4038 | gfc_error ("Junk after CALL at %C"); | |
36abe895 | 4039 | gfc_free_expr (base); |
8c6a85e3 TB |
4040 | return MATCH_ERROR; |
4041 | } | |
30aabb86 | 4042 | |
8c6a85e3 TB |
4043 | if (base->expr_type == EXPR_COMPCALL) |
4044 | new_st.op = EXEC_COMPCALL; | |
4045 | else if (base->expr_type == EXPR_PPC) | |
4046 | new_st.op = EXEC_CALL_PPC; | |
4047 | else | |
4048 | { | |
4049 | gfc_error ("Expected type-bound procedure or procedure pointer component " | |
4050 | "at %C"); | |
36abe895 | 4051 | gfc_free_expr (base); |
8c6a85e3 | 4052 | return MATCH_ERROR; |
6de9cd9a | 4053 | } |
8c6a85e3 | 4054 | new_st.expr1 = base; |
6de9cd9a | 4055 | |
6de9cd9a | 4056 | return MATCH_YES; |
6de9cd9a DN |
4057 | } |
4058 | ||
4059 | ||
8c6a85e3 TB |
4060 | /* Match a CALL statement. The tricky part here are possible |
4061 | alternate return specifiers. We handle these by having all | |
4062 | "subroutines" actually return an integer via a register that gives | |
4063 | the return number. If the call specifies alternate returns, we | |
4064 | generate code for a SELECT statement whose case clauses contain | |
4065 | GOTOs to the various labels. */ | |
6de9cd9a DN |
4066 | |
4067 | match | |
8c6a85e3 | 4068 | gfc_match_call (void) |
6de9cd9a DN |
4069 | { |
4070 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
8c6a85e3 TB |
4071 | gfc_actual_arglist *a, *arglist; |
4072 | gfc_case *new_case; | |
6de9cd9a | 4073 | gfc_symbol *sym; |
8c6a85e3 TB |
4074 | gfc_symtree *st; |
4075 | gfc_code *c; | |
6de9cd9a | 4076 | match m; |
8c6a85e3 | 4077 | int i; |
6de9cd9a | 4078 | |
8c6a85e3 | 4079 | arglist = NULL; |
6de9cd9a | 4080 | |
8c6a85e3 TB |
4081 | m = gfc_match ("% %n", name); |
4082 | if (m == MATCH_NO) | |
4083 | goto syntax; | |
6de9cd9a | 4084 | if (m != MATCH_YES) |
8c6a85e3 | 4085 | return m; |
6de9cd9a | 4086 | |
8c6a85e3 | 4087 | if (gfc_get_ha_sym_tree (name, &st)) |
6de9cd9a DN |
4088 | return MATCH_ERROR; |
4089 | ||
8c6a85e3 | 4090 | sym = st->n.sym; |
6de9cd9a | 4091 | |
8c6a85e3 TB |
4092 | /* If this is a variable of derived-type, it probably starts a type-bound |
4093 | procedure call. */ | |
4094 | if ((sym->attr.flavor != FL_PROCEDURE | |
4095 | || gfc_is_function_return_value (sym, gfc_current_ns)) | |
4096 | && (sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS)) | |
4097 | return match_typebound_call (st); | |
6de9cd9a | 4098 | |
8c6a85e3 TB |
4099 | /* If it does not seem to be callable (include functions so that the |
4100 | right association is made. They are thrown out in resolution.) | |
4101 | ... */ | |
4102 | if (!sym->attr.generic | |
4103 | && !sym->attr.subroutine | |
4104 | && !sym->attr.function) | |
4105 | { | |
4106 | if (!(sym->attr.external && !sym->attr.referenced)) | |
4107 | { | |
4108 | /* ...create a symbol in this scope... */ | |
4109 | if (sym->ns != gfc_current_ns | |
4110 | && gfc_get_sym_tree (name, NULL, &st, false) == 1) | |
4111 | return MATCH_ERROR; | |
6de9cd9a | 4112 | |
8c6a85e3 TB |
4113 | if (sym != st->n.sym) |
4114 | sym = st->n.sym; | |
4115 | } | |
6de9cd9a | 4116 | |
8c6a85e3 | 4117 | /* ...and then to try to make the symbol into a subroutine. */ |
524af0d6 | 4118 | if (!gfc_add_subroutine (&sym->attr, sym->name, NULL)) |
8c6a85e3 TB |
4119 | return MATCH_ERROR; |
4120 | } | |
6de9cd9a | 4121 | |
8c6a85e3 | 4122 | gfc_set_sym_referenced (sym); |
6de9cd9a | 4123 | |
8c6a85e3 | 4124 | if (gfc_match_eos () != MATCH_YES) |
6de9cd9a | 4125 | { |
8c6a85e3 TB |
4126 | m = gfc_match_actual_arglist (1, &arglist); |
4127 | if (m == MATCH_NO) | |
4128 | goto syntax; | |
4129 | if (m == MATCH_ERROR) | |
4130 | goto cleanup; | |
4131 | ||
4132 | if (gfc_match_eos () != MATCH_YES) | |
4133 | goto syntax; | |
6de9cd9a | 4134 | } |
6de9cd9a | 4135 | |
8c6a85e3 TB |
4136 | /* If any alternate return labels were found, construct a SELECT |
4137 | statement that will jump to the right place. */ | |
6de9cd9a | 4138 | |
8c6a85e3 TB |
4139 | i = 0; |
4140 | for (a = arglist; a; a = a->next) | |
4141 | if (a->expr == NULL) | |
502af491 PCC |
4142 | { |
4143 | i = 1; | |
4144 | break; | |
4145 | } | |
6de9cd9a | 4146 | |
8c6a85e3 TB |
4147 | if (i) |
4148 | { | |
4149 | gfc_symtree *select_st; | |
4150 | gfc_symbol *select_sym; | |
4151 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6de9cd9a | 4152 | |
11e5274a | 4153 | new_st.next = c = gfc_get_code (EXEC_SELECT); |
8c6a85e3 TB |
4154 | sprintf (name, "_result_%s", sym->name); |
4155 | gfc_get_ha_sym_tree (name, &select_st); /* Can't fail. */ | |
6de9cd9a | 4156 | |
8c6a85e3 TB |
4157 | select_sym = select_st->n.sym; |
4158 | select_sym->ts.type = BT_INTEGER; | |
4159 | select_sym->ts.kind = gfc_default_integer_kind; | |
4160 | gfc_set_sym_referenced (select_sym); | |
4161 | c->expr1 = gfc_get_expr (); | |
4162 | c->expr1->expr_type = EXPR_VARIABLE; | |
4163 | c->expr1->symtree = select_st; | |
4164 | c->expr1->ts = select_sym->ts; | |
4165 | c->expr1->where = gfc_current_locus; | |
4166 | ||
4167 | i = 0; | |
4168 | for (a = arglist; a; a = a->next) | |
6de9cd9a | 4169 | { |
8c6a85e3 TB |
4170 | if (a->expr != NULL) |
4171 | continue; | |
6de9cd9a | 4172 | |
524af0d6 | 4173 | if (!gfc_reference_st_label (a->label, ST_LABEL_TARGET)) |
8c6a85e3 | 4174 | continue; |
e0e85e06 | 4175 | |
8c6a85e3 | 4176 | i++; |
6de9cd9a | 4177 | |
11e5274a | 4178 | c->block = gfc_get_code (EXEC_SELECT); |
8c6a85e3 | 4179 | c = c->block; |
6de9cd9a | 4180 | |
8c6a85e3 TB |
4181 | new_case = gfc_get_case (); |
4182 | new_case->high = gfc_get_int_expr (gfc_default_integer_kind, NULL, i); | |
4183 | new_case->low = new_case->high; | |
4184 | c->ext.block.case_list = new_case; | |
6de9cd9a | 4185 | |
11e5274a | 4186 | c->next = gfc_get_code (EXEC_GOTO); |
8c6a85e3 TB |
4187 | c->next->label1 = a->label; |
4188 | } | |
4189 | } | |
e0e85e06 | 4190 | |
8c6a85e3 TB |
4191 | new_st.op = EXEC_CALL; |
4192 | new_st.symtree = st; | |
4193 | new_st.ext.actual = arglist; | |
6de9cd9a | 4194 | |
8c6a85e3 | 4195 | return MATCH_YES; |
6de9cd9a | 4196 | |
8c6a85e3 TB |
4197 | syntax: |
4198 | gfc_syntax_error (ST_CALL); | |
6de9cd9a | 4199 | |
8c6a85e3 TB |
4200 | cleanup: |
4201 | gfc_free_actual_arglist (arglist); | |
4202 | return MATCH_ERROR; | |
4203 | } | |
6de9cd9a | 4204 | |
6de9cd9a | 4205 | |
8c6a85e3 TB |
4206 | /* Given a name, return a pointer to the common head structure, |
4207 | creating it if it does not exist. If FROM_MODULE is nonzero, we | |
8b704316 | 4208 | mangle the name so that it doesn't interfere with commons defined |
8c6a85e3 TB |
4209 | in the using namespace. |
4210 | TODO: Add to global symbol tree. */ | |
4211 | ||
4212 | gfc_common_head * | |
4213 | gfc_get_common (const char *name, int from_module) | |
4214 | { | |
4215 | gfc_symtree *st; | |
4216 | static int serial = 0; | |
4217 | char mangled_name[GFC_MAX_SYMBOL_LEN + 1]; | |
4218 | ||
4219 | if (from_module) | |
4220 | { | |
4221 | /* A use associated common block is only needed to correctly layout | |
4222 | the variables it contains. */ | |
4223 | snprintf (mangled_name, GFC_MAX_SYMBOL_LEN, "_%d_%s", serial++, name); | |
4224 | st = gfc_new_symtree (&gfc_current_ns->common_root, mangled_name); | |
6de9cd9a | 4225 | } |
8c6a85e3 TB |
4226 | else |
4227 | { | |
4228 | st = gfc_find_symtree (gfc_current_ns->common_root, name); | |
6de9cd9a | 4229 | |
8c6a85e3 TB |
4230 | if (st == NULL) |
4231 | st = gfc_new_symtree (&gfc_current_ns->common_root, name); | |
4232 | } | |
6de9cd9a | 4233 | |
8c6a85e3 TB |
4234 | if (st->n.common == NULL) |
4235 | { | |
4236 | st->n.common = gfc_get_common_head (); | |
4237 | st->n.common->where = gfc_current_locus; | |
4238 | strcpy (st->n.common->name, name); | |
4239 | } | |
6de9cd9a | 4240 | |
8c6a85e3 | 4241 | return st->n.common; |
6de9cd9a DN |
4242 | } |
4243 | ||
4244 | ||
8c6a85e3 | 4245 | /* Match a common block name. */ |
6de9cd9a | 4246 | |
8c6a85e3 | 4247 | match match_common_name (char *name) |
6de9cd9a DN |
4248 | { |
4249 | match m; | |
4250 | ||
8c6a85e3 TB |
4251 | if (gfc_match_char ('/') == MATCH_NO) |
4252 | { | |
4253 | name[0] = '\0'; | |
4254 | return MATCH_YES; | |
4255 | } | |
6de9cd9a | 4256 | |
8c6a85e3 TB |
4257 | if (gfc_match_char ('/') == MATCH_YES) |
4258 | { | |
4259 | name[0] = '\0'; | |
4260 | return MATCH_YES; | |
4261 | } | |
6de9cd9a | 4262 | |
8c6a85e3 | 4263 | m = gfc_match_name (name); |
6de9cd9a | 4264 | |
8c6a85e3 TB |
4265 | if (m == MATCH_ERROR) |
4266 | return MATCH_ERROR; | |
4267 | if (m == MATCH_YES && gfc_match_char ('/') == MATCH_YES) | |
4268 | return MATCH_YES; | |
6de9cd9a | 4269 | |
8c6a85e3 TB |
4270 | gfc_error ("Syntax error in common block name at %C"); |
4271 | return MATCH_ERROR; | |
31fee91e MM |
4272 | } |
4273 | ||
4274 | ||
8c6a85e3 | 4275 | /* Match a COMMON statement. */ |
6de9cd9a DN |
4276 | |
4277 | match | |
8c6a85e3 | 4278 | gfc_match_common (void) |
6de9cd9a | 4279 | { |
8c6a85e3 TB |
4280 | gfc_symbol *sym, **head, *tail, *other, *old_blank_common; |
4281 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4282 | gfc_common_head *t; | |
4283 | gfc_array_spec *as; | |
4284 | gfc_equiv *e1, *e2; | |
6de9cd9a DN |
4285 | match m; |
4286 | ||
8c6a85e3 TB |
4287 | old_blank_common = gfc_current_ns->blank_common.head; |
4288 | if (old_blank_common) | |
4289 | { | |
4290 | while (old_blank_common->common_next) | |
4291 | old_blank_common = old_blank_common->common_next; | |
4292 | } | |
4293 | ||
4294 | as = NULL; | |
6de9cd9a DN |
4295 | |
4296 | for (;;) | |
4297 | { | |
8c6a85e3 TB |
4298 | m = match_common_name (name); |
4299 | if (m == MATCH_ERROR) | |
4300 | goto cleanup; | |
6de9cd9a | 4301 | |
8c6a85e3 TB |
4302 | if (name[0] == '\0') |
4303 | { | |
4304 | t = &gfc_current_ns->blank_common; | |
4305 | if (t->head == NULL) | |
4306 | t->where = gfc_current_locus; | |
4307 | } | |
4308 | else | |
4309 | { | |
4310 | t = gfc_get_common (name, 0); | |
4311 | } | |
4312 | head = &t->head; | |
4313 | ||
4314 | if (*head == NULL) | |
4315 | tail = NULL; | |
4316 | else | |
4317 | { | |
4318 | tail = *head; | |
4319 | while (tail->common_next) | |
4320 | tail = tail->common_next; | |
4321 | } | |
6de9cd9a | 4322 | |
8c6a85e3 | 4323 | /* Grab the list of symbols. */ |
6de9cd9a DN |
4324 | for (;;) |
4325 | { | |
8c6a85e3 | 4326 | m = gfc_match_symbol (&sym, 0); |
6de9cd9a DN |
4327 | if (m == MATCH_ERROR) |
4328 | goto cleanup; | |
4329 | if (m == MATCH_NO) | |
4330 | goto syntax; | |
4331 | ||
8c6a85e3 TB |
4332 | /* Store a ref to the common block for error checking. */ |
4333 | sym->common_block = t; | |
6f79f4d1 | 4334 | sym->common_block->refs++; |
8b704316 | 4335 | |
8c6a85e3 TB |
4336 | /* See if we know the current common block is bind(c), and if |
4337 | so, then see if we can check if the symbol is (which it'll | |
4338 | need to be). This can happen if the bind(c) attr stmt was | |
4339 | applied to the common block, and the variable(s) already | |
4340 | defined, before declaring the common block. */ | |
4341 | if (t->is_bind_c == 1) | |
4342 | { | |
4343 | if (sym->ts.type != BT_UNKNOWN && sym->ts.is_c_interop != 1) | |
4344 | { | |
4345 | /* If we find an error, just print it and continue, | |
4346 | cause it's just semantic, and we can see if there | |
4347 | are more errors. */ | |
fea70c99 MLI |
4348 | gfc_error_now ("Variable %qs at %L in common block %qs " |
4349 | "at %C must be declared with a C " | |
4350 | "interoperable kind since common block " | |
4351 | "%qs is bind(c)", | |
4352 | sym->name, &(sym->declared_at), t->name, | |
4353 | t->name); | |
8c6a85e3 | 4354 | } |
8b704316 | 4355 | |
8c6a85e3 | 4356 | if (sym->attr.is_bind_c == 1) |
4daa149b TB |
4357 | gfc_error_now ("Variable %qs in common block %qs at %C can not " |
4358 | "be bind(c) since it is not global", sym->name, | |
4359 | t->name); | |
8c6a85e3 | 4360 | } |
8b704316 | 4361 | |
8c6a85e3 | 4362 | if (sym->attr.in_common) |
e8ec07e1 | 4363 | { |
c4100eae | 4364 | gfc_error ("Symbol %qs at %C is already in a COMMON block", |
8c6a85e3 | 4365 | sym->name); |
e8ec07e1 PT |
4366 | goto cleanup; |
4367 | } | |
4368 | ||
8c6a85e3 TB |
4369 | if (((sym->value != NULL && sym->value->expr_type != EXPR_NULL) |
4370 | || sym->attr.data) && gfc_current_state () != COMP_BLOCK_DATA) | |
30aabb86 | 4371 | { |
a4d9b221 | 4372 | if (!gfc_notify_std (GFC_STD_GNU, "Initialized symbol %qs at " |
524af0d6 JB |
4373 | "%C can only be COMMON in BLOCK DATA", |
4374 | sym->name)) | |
30aabb86 | 4375 | goto cleanup; |
8c6a85e3 | 4376 | } |
6de9cd9a | 4377 | |
524af0d6 | 4378 | if (!gfc_add_in_common (&sym->attr, sym->name, NULL)) |
8c6a85e3 | 4379 | goto cleanup; |
6de9cd9a | 4380 | |
8c6a85e3 TB |
4381 | if (tail != NULL) |
4382 | tail->common_next = sym; | |
4383 | else | |
4384 | *head = sym; | |
6de9cd9a | 4385 | |
8c6a85e3 | 4386 | tail = sym; |
6de9cd9a | 4387 | |
8c6a85e3 TB |
4388 | /* Deal with an optional array specification after the |
4389 | symbol name. */ | |
4390 | m = gfc_match_array_spec (&as, true, true); | |
4391 | if (m == MATCH_ERROR) | |
4392 | goto cleanup; | |
6de9cd9a | 4393 | |
8c6a85e3 TB |
4394 | if (m == MATCH_YES) |
4395 | { | |
4396 | if (as->type != AS_EXPLICIT) | |
4397 | { | |
a4d9b221 | 4398 | gfc_error ("Array specification for symbol %qs in COMMON " |
8c6a85e3 TB |
4399 | "at %C must be explicit", sym->name); |
4400 | goto cleanup; | |
4401 | } | |
b251af97 | 4402 | |
524af0d6 | 4403 | if (!gfc_add_dimension (&sym->attr, sym->name, NULL)) |
8c6a85e3 | 4404 | goto cleanup; |
d68bd5a8 | 4405 | |
8c6a85e3 TB |
4406 | if (sym->attr.pointer) |
4407 | { | |
a4d9b221 | 4408 | gfc_error ("Symbol %qs in COMMON at %C cannot be a " |
8c6a85e3 TB |
4409 | "POINTER array", sym->name); |
4410 | goto cleanup; | |
4411 | } | |
4213f93b | 4412 | |
8c6a85e3 TB |
4413 | sym->as = as; |
4414 | as = NULL; | |
4213f93b | 4415 | |
8c6a85e3 | 4416 | } |
9081e356 | 4417 | |
8c6a85e3 | 4418 | sym->common_head = t; |
4213f93b | 4419 | |
8c6a85e3 TB |
4420 | /* Check to see if the symbol is already in an equivalence group. |
4421 | If it is, set the other members as being in common. */ | |
4422 | if (sym->attr.in_equivalence) | |
4423 | { | |
4424 | for (e1 = gfc_current_ns->equiv; e1; e1 = e1->next) | |
4425 | { | |
4426 | for (e2 = e1; e2; e2 = e2->eq) | |
4427 | if (e2->expr->symtree->n.sym == sym) | |
4428 | goto equiv_found; | |
4213f93b | 4429 | |
8c6a85e3 | 4430 | continue; |
d68bd5a8 | 4431 | |
8c6a85e3 | 4432 | equiv_found: |
4213f93b | 4433 | |
8c6a85e3 TB |
4434 | for (e2 = e1; e2; e2 = e2->eq) |
4435 | { | |
4436 | other = e2->expr->symtree->n.sym; | |
4437 | if (other->common_head | |
4438 | && other->common_head != sym->common_head) | |
4439 | { | |
a4d9b221 | 4440 | gfc_error ("Symbol %qs, in COMMON block %qs at " |
8c6a85e3 | 4441 | "%C is being indirectly equivalenced to " |
a4d9b221 | 4442 | "another COMMON block %qs", |
8c6a85e3 TB |
4443 | sym->name, sym->common_head->name, |
4444 | other->common_head->name); | |
4445 | goto cleanup; | |
4446 | } | |
4447 | other->attr.in_common = 1; | |
4448 | other->common_head = t; | |
4449 | } | |
4450 | } | |
4451 | } | |
d68bd5a8 | 4452 | |
4213f93b | 4453 | |
8c6a85e3 TB |
4454 | gfc_gobble_whitespace (); |
4455 | if (gfc_match_eos () == MATCH_YES) | |
4456 | goto done; | |
4457 | if (gfc_peek_ascii_char () == '/') | |
4458 | break; | |
4459 | if (gfc_match_char (',') != MATCH_YES) | |
4460 | goto syntax; | |
4461 | gfc_gobble_whitespace (); | |
4462 | if (gfc_peek_ascii_char () == '/') | |
4463 | break; | |
4464 | } | |
4213f93b PT |
4465 | } |
4466 | ||
8c6a85e3 TB |
4467 | done: |
4468 | return MATCH_YES; | |
4213f93b | 4469 | |
8c6a85e3 TB |
4470 | syntax: |
4471 | gfc_syntax_error (ST_COMMON); | |
4213f93b | 4472 | |
8c6a85e3 | 4473 | cleanup: |
8c6a85e3 TB |
4474 | gfc_free_array_spec (as); |
4475 | return MATCH_ERROR; | |
4213f93b PT |
4476 | } |
4477 | ||
6de9cd9a | 4478 | |
8c6a85e3 | 4479 | /* Match a BLOCK DATA program unit. */ |
6de9cd9a DN |
4480 | |
4481 | match | |
8c6a85e3 | 4482 | gfc_match_block_data (void) |
6de9cd9a | 4483 | { |
8c6a85e3 | 4484 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
6de9cd9a | 4485 | gfc_symbol *sym; |
6de9cd9a DN |
4486 | match m; |
4487 | ||
8c6a85e3 TB |
4488 | if (gfc_match_eos () == MATCH_YES) |
4489 | { | |
4490 | gfc_new_block = NULL; | |
4491 | return MATCH_YES; | |
4492 | } | |
4493 | ||
4494 | m = gfc_match ("% %n%t", name); | |
6de9cd9a | 4495 | if (m != MATCH_YES) |
8c6a85e3 | 4496 | return MATCH_ERROR; |
6de9cd9a | 4497 | |
8c6a85e3 TB |
4498 | if (gfc_get_symbol (name, NULL, &sym)) |
4499 | return MATCH_ERROR; | |
6de9cd9a | 4500 | |
524af0d6 | 4501 | if (!gfc_add_flavor (&sym->attr, FL_BLOCK_DATA, sym->name, NULL)) |
8c6a85e3 | 4502 | return MATCH_ERROR; |
6de9cd9a | 4503 | |
8c6a85e3 | 4504 | gfc_new_block = sym; |
6de9cd9a | 4505 | |
8c6a85e3 TB |
4506 | return MATCH_YES; |
4507 | } | |
d71b89ca | 4508 | |
6de9cd9a | 4509 | |
8c6a85e3 | 4510 | /* Free a namelist structure. */ |
4213f93b | 4511 | |
8c6a85e3 TB |
4512 | void |
4513 | gfc_free_namelist (gfc_namelist *name) | |
4514 | { | |
4515 | gfc_namelist *n; | |
6de9cd9a | 4516 | |
8c6a85e3 TB |
4517 | for (; name; name = n) |
4518 | { | |
4519 | n = name->next; | |
4520 | free (name); | |
4521 | } | |
4522 | } | |
e2ab8b09 | 4523 | |
6de9cd9a | 4524 | |
dd2fc525 JJ |
4525 | /* Free an OpenMP namelist structure. */ |
4526 | ||
4527 | void | |
4528 | gfc_free_omp_namelist (gfc_omp_namelist *name) | |
4529 | { | |
4530 | gfc_omp_namelist *n; | |
4531 | ||
4532 | for (; name; name = n) | |
4533 | { | |
4534 | gfc_free_expr (name->expr); | |
b46ebd6c JJ |
4535 | if (name->udr) |
4536 | { | |
4537 | if (name->udr->combiner) | |
4538 | gfc_free_statement (name->udr->combiner); | |
4539 | if (name->udr->initializer) | |
4540 | gfc_free_statement (name->udr->initializer); | |
4541 | free (name->udr); | |
4542 | } | |
dd2fc525 JJ |
4543 | n = name->next; |
4544 | free (name); | |
4545 | } | |
4546 | } | |
4547 | ||
4548 | ||
8c6a85e3 | 4549 | /* Match a NAMELIST statement. */ |
6de9cd9a | 4550 | |
8c6a85e3 TB |
4551 | match |
4552 | gfc_match_namelist (void) | |
4553 | { | |
4554 | gfc_symbol *group_name, *sym; | |
4555 | gfc_namelist *nl; | |
4556 | match m, m2; | |
6de9cd9a | 4557 | |
8c6a85e3 TB |
4558 | m = gfc_match (" / %s /", &group_name); |
4559 | if (m == MATCH_NO) | |
4560 | goto syntax; | |
4561 | if (m == MATCH_ERROR) | |
4562 | goto error; | |
6de9cd9a | 4563 | |
8c6a85e3 TB |
4564 | for (;;) |
4565 | { | |
4566 | if (group_name->ts.type != BT_UNKNOWN) | |
4567 | { | |
a4d9b221 | 4568 | gfc_error ("Namelist group name %qs at %C already has a basic " |
8c6a85e3 TB |
4569 | "type of %s", group_name->name, |
4570 | gfc_typename (&group_name->ts)); | |
4571 | return MATCH_ERROR; | |
4572 | } | |
6de9cd9a | 4573 | |
8c6a85e3 TB |
4574 | if (group_name->attr.flavor == FL_NAMELIST |
4575 | && group_name->attr.use_assoc | |
a4d9b221 | 4576 | && !gfc_notify_std (GFC_STD_GNU, "Namelist group name %qs " |
524af0d6 JB |
4577 | "at %C already is USE associated and can" |
4578 | "not be respecified.", group_name->name)) | |
8c6a85e3 | 4579 | return MATCH_ERROR; |
6de9cd9a | 4580 | |
8c6a85e3 | 4581 | if (group_name->attr.flavor != FL_NAMELIST |
524af0d6 JB |
4582 | && !gfc_add_flavor (&group_name->attr, FL_NAMELIST, |
4583 | group_name->name, NULL)) | |
8c6a85e3 | 4584 | return MATCH_ERROR; |
6de9cd9a | 4585 | |
8c6a85e3 TB |
4586 | for (;;) |
4587 | { | |
4588 | m = gfc_match_symbol (&sym, 1); | |
4589 | if (m == MATCH_NO) | |
4590 | goto syntax; | |
4591 | if (m == MATCH_ERROR) | |
4592 | goto error; | |
6de9cd9a | 4593 | |
8c6a85e3 | 4594 | if (sym->attr.in_namelist == 0 |
524af0d6 | 4595 | && !gfc_add_in_namelist (&sym->attr, sym->name, NULL)) |
8c6a85e3 | 4596 | goto error; |
6de9cd9a | 4597 | |
8c6a85e3 TB |
4598 | /* Use gfc_error_check here, rather than goto error, so that |
4599 | these are the only errors for the next two lines. */ | |
4600 | if (sym->as && sym->as->type == AS_ASSUMED_SIZE) | |
4601 | { | |
a4d9b221 | 4602 | gfc_error ("Assumed size array %qs in namelist %qs at " |
8c6a85e3 TB |
4603 | "%C is not allowed", sym->name, group_name->name); |
4604 | gfc_error_check (); | |
4605 | } | |
6de9cd9a | 4606 | |
8c6a85e3 TB |
4607 | nl = gfc_get_namelist (); |
4608 | nl->sym = sym; | |
4609 | sym->refs++; | |
6de9cd9a | 4610 | |
8c6a85e3 TB |
4611 | if (group_name->namelist == NULL) |
4612 | group_name->namelist = group_name->namelist_tail = nl; | |
4613 | else | |
4614 | { | |
4615 | group_name->namelist_tail->next = nl; | |
4616 | group_name->namelist_tail = nl; | |
4617 | } | |
6de9cd9a | 4618 | |
8c6a85e3 TB |
4619 | if (gfc_match_eos () == MATCH_YES) |
4620 | goto done; | |
6de9cd9a | 4621 | |
8c6a85e3 | 4622 | m = gfc_match_char (','); |
6de9cd9a | 4623 | |
8c6a85e3 TB |
4624 | if (gfc_match_char ('/') == MATCH_YES) |
4625 | { | |
4626 | m2 = gfc_match (" %s /", &group_name); | |
4627 | if (m2 == MATCH_YES) | |
4628 | break; | |
4629 | if (m2 == MATCH_ERROR) | |
4630 | goto error; | |
4631 | goto syntax; | |
4632 | } | |
6de9cd9a | 4633 | |
8c6a85e3 TB |
4634 | if (m != MATCH_YES) |
4635 | goto syntax; | |
6de9cd9a DN |
4636 | } |
4637 | } | |
4638 | ||
8c6a85e3 | 4639 | done: |
6de9cd9a DN |
4640 | return MATCH_YES; |
4641 | ||
8c6a85e3 TB |
4642 | syntax: |
4643 | gfc_syntax_error (ST_NAMELIST); | |
6de9cd9a | 4644 | |
8c6a85e3 | 4645 | error: |
6de9cd9a DN |
4646 | return MATCH_ERROR; |
4647 | } | |
4648 | ||
4649 | ||
8c6a85e3 | 4650 | /* Match a MODULE statement. */ |
6de9cd9a | 4651 | |
8c6a85e3 TB |
4652 | match |
4653 | gfc_match_module (void) | |
6de9cd9a | 4654 | { |
6de9cd9a DN |
4655 | match m; |
4656 | ||
8c6a85e3 | 4657 | m = gfc_match (" %s%t", &gfc_new_block); |
6de9cd9a DN |
4658 | if (m != MATCH_YES) |
4659 | return m; | |
4660 | ||
524af0d6 JB |
4661 | if (!gfc_add_flavor (&gfc_new_block->attr, FL_MODULE, |
4662 | gfc_new_block->name, NULL)) | |
8c6a85e3 | 4663 | return MATCH_ERROR; |
6de9cd9a | 4664 | |
8c6a85e3 | 4665 | return MATCH_YES; |
6de9cd9a DN |
4666 | } |
4667 | ||
4668 | ||
8c6a85e3 TB |
4669 | /* Free equivalence sets and lists. Recursively is the easiest way to |
4670 | do this. */ | |
6de9cd9a | 4671 | |
8c6a85e3 TB |
4672 | void |
4673 | gfc_free_equiv_until (gfc_equiv *eq, gfc_equiv *stop) | |
6de9cd9a | 4674 | { |
8c6a85e3 TB |
4675 | if (eq == stop) |
4676 | return; | |
6de9cd9a | 4677 | |
8c6a85e3 TB |
4678 | gfc_free_equiv (eq->eq); |
4679 | gfc_free_equiv_until (eq->next, stop); | |
4680 | gfc_free_expr (eq->expr); | |
4681 | free (eq); | |
4682 | } | |
6de9cd9a | 4683 | |
6de9cd9a | 4684 | |
8c6a85e3 TB |
4685 | void |
4686 | gfc_free_equiv (gfc_equiv *eq) | |
4687 | { | |
4688 | gfc_free_equiv_until (eq, NULL); | |
6de9cd9a DN |
4689 | } |
4690 | ||
4691 | ||
8c6a85e3 | 4692 | /* Match an EQUIVALENCE statement. */ |
7431bf06 | 4693 | |
8c6a85e3 TB |
4694 | match |
4695 | gfc_match_equivalence (void) | |
7431bf06 | 4696 | { |
8c6a85e3 TB |
4697 | gfc_equiv *eq, *set, *tail; |
4698 | gfc_ref *ref; | |
4699 | gfc_symbol *sym; | |
4700 | match m; | |
4701 | gfc_common_head *common_head = NULL; | |
4702 | bool common_flag; | |
4703 | int cnt; | |
7431bf06 | 4704 | |
8c6a85e3 | 4705 | tail = NULL; |
7431bf06 | 4706 | |
8c6a85e3 TB |
4707 | for (;;) |
4708 | { | |
4709 | eq = gfc_get_equiv (); | |
4710 | if (tail == NULL) | |
4711 | tail = eq; | |
7431bf06 | 4712 | |
8c6a85e3 TB |
4713 | eq->next = gfc_current_ns->equiv; |
4714 | gfc_current_ns->equiv = eq; | |
7431bf06 | 4715 | |
8c6a85e3 TB |
4716 | if (gfc_match_char ('(') != MATCH_YES) |
4717 | goto syntax; | |
7431bf06 | 4718 | |
8c6a85e3 TB |
4719 | set = eq; |
4720 | common_flag = FALSE; | |
4721 | cnt = 0; | |
7431bf06 | 4722 | |
8c6a85e3 TB |
4723 | for (;;) |
4724 | { | |
4725 | m = gfc_match_equiv_variable (&set->expr); | |
4726 | if (m == MATCH_ERROR) | |
4727 | goto cleanup; | |
4728 | if (m == MATCH_NO) | |
4729 | goto syntax; | |
3e78238a | 4730 | |
8c6a85e3 TB |
4731 | /* count the number of objects. */ |
4732 | cnt++; | |
4733 | ||
4734 | if (gfc_match_char ('%') == MATCH_YES) | |
4735 | { | |
4736 | gfc_error ("Derived type component %C is not a " | |
4737 | "permitted EQUIVALENCE member"); | |
4738 | goto cleanup; | |
4739 | } | |
7431bf06 | 4740 | |
8c6a85e3 TB |
4741 | for (ref = set->expr->ref; ref; ref = ref->next) |
4742 | if (ref->type == REF_ARRAY && ref->u.ar.type == AR_SECTION) | |
4743 | { | |
4744 | gfc_error ("Array reference in EQUIVALENCE at %C cannot " | |
4745 | "be an array section"); | |
4746 | goto cleanup; | |
4747 | } | |
7431bf06 | 4748 | |
8c6a85e3 | 4749 | sym = set->expr->symtree->n.sym; |
cf2b3c22 | 4750 | |
524af0d6 | 4751 | if (!gfc_add_in_equivalence (&sym->attr, sym->name, NULL)) |
8c6a85e3 | 4752 | goto cleanup; |
cf2b3c22 | 4753 | |
8c6a85e3 TB |
4754 | if (sym->attr.in_common) |
4755 | { | |
4756 | common_flag = TRUE; | |
4757 | common_head = sym->common_head; | |
4758 | } | |
4759 | ||
4760 | if (gfc_match_char (')') == MATCH_YES) | |
4761 | break; | |
cf2b3c22 | 4762 | |
8c6a85e3 TB |
4763 | if (gfc_match_char (',') != MATCH_YES) |
4764 | goto syntax; | |
cf2b3c22 | 4765 | |
8c6a85e3 TB |
4766 | set->eq = gfc_get_equiv (); |
4767 | set = set->eq; | |
4768 | } | |
93d76687 | 4769 | |
8c6a85e3 | 4770 | if (cnt < 2) |
bc382218 | 4771 | { |
8c6a85e3 | 4772 | gfc_error ("EQUIVALENCE at %C requires two or more objects"); |
bc382218 JW |
4773 | goto cleanup; |
4774 | } | |
cf2b3c22 | 4775 | |
8c6a85e3 TB |
4776 | /* If one of the members of an equivalence is in common, then |
4777 | mark them all as being in common. Before doing this, check | |
4778 | that members of the equivalence group are not in different | |
4779 | common blocks. */ | |
4780 | if (common_flag) | |
4781 | for (set = eq; set; set = set->eq) | |
4782 | { | |
4783 | sym = set->expr->symtree->n.sym; | |
4784 | if (sym->common_head && sym->common_head != common_head) | |
4785 | { | |
4786 | gfc_error ("Attempt to indirectly overlap COMMON " | |
4787 | "blocks %s and %s by EQUIVALENCE at %C", | |
4788 | sym->common_head->name, common_head->name); | |
4789 | goto cleanup; | |
4790 | } | |
4791 | sym->attr.in_common = 1; | |
4792 | sym->common_head = common_head; | |
4793 | } | |
cf2b3c22 | 4794 | |
8c6a85e3 TB |
4795 | if (gfc_match_eos () == MATCH_YES) |
4796 | break; | |
4797 | if (gfc_match_char (',') != MATCH_YES) | |
4798 | { | |
4799 | gfc_error ("Expecting a comma in EQUIVALENCE at %C"); | |
4800 | goto cleanup; | |
4801 | } | |
cf2b3c22 TB |
4802 | } |
4803 | ||
8c6a85e3 | 4804 | return MATCH_YES; |
cf2b3c22 | 4805 | |
8c6a85e3 TB |
4806 | syntax: |
4807 | gfc_syntax_error (ST_EQUIVALENCE); | |
cf2b3c22 | 4808 | |
bc382218 | 4809 | cleanup: |
8c6a85e3 TB |
4810 | eq = tail->next; |
4811 | tail->next = NULL; | |
4812 | ||
4813 | gfc_free_equiv (gfc_current_ns->equiv); | |
4814 | gfc_current_ns->equiv = eq; | |
4815 | ||
4816 | return MATCH_ERROR; | |
cf2b3c22 TB |
4817 | } |
4818 | ||
4819 | ||
8c6a85e3 TB |
4820 | /* Check that a statement function is not recursive. This is done by looking |
4821 | for the statement function symbol(sym) by looking recursively through its | |
8b704316 | 4822 | expression(e). If a reference to sym is found, true is returned. |
8c6a85e3 TB |
4823 | 12.5.4 requires that any variable of function that is implicitly typed |
4824 | shall have that type confirmed by any subsequent type declaration. The | |
4825 | implicit typing is conveniently done here. */ | |
4826 | static bool | |
4827 | recursive_stmt_fcn (gfc_expr *, gfc_symbol *); | |
6de9cd9a | 4828 | |
8c6a85e3 TB |
4829 | static bool |
4830 | check_stmt_fcn (gfc_expr *e, gfc_symbol *sym, int *f ATTRIBUTE_UNUSED) | |
6de9cd9a | 4831 | { |
6de9cd9a | 4832 | |
8c6a85e3 TB |
4833 | if (e == NULL) |
4834 | return false; | |
6de9cd9a | 4835 | |
8c6a85e3 | 4836 | switch (e->expr_type) |
6de9cd9a | 4837 | { |
8c6a85e3 TB |
4838 | case EXPR_FUNCTION: |
4839 | if (e->symtree == NULL) | |
4840 | return false; | |
6de9cd9a | 4841 | |
8c6a85e3 TB |
4842 | /* Check the name before testing for nested recursion! */ |
4843 | if (sym->name == e->symtree->n.sym->name) | |
4844 | return true; | |
6de9cd9a | 4845 | |
8c6a85e3 TB |
4846 | /* Catch recursion via other statement functions. */ |
4847 | if (e->symtree->n.sym->attr.proc == PROC_ST_FUNCTION | |
4848 | && e->symtree->n.sym->value | |
4849 | && recursive_stmt_fcn (e->symtree->n.sym->value, sym)) | |
4850 | return true; | |
6de9cd9a | 4851 | |
8c6a85e3 TB |
4852 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) |
4853 | gfc_set_default_type (e->symtree->n.sym, 0, NULL); | |
6de9cd9a | 4854 | |
8c6a85e3 | 4855 | break; |
6de9cd9a | 4856 | |
8c6a85e3 TB |
4857 | case EXPR_VARIABLE: |
4858 | if (e->symtree && sym->name == e->symtree->n.sym->name) | |
4859 | return true; | |
6de9cd9a | 4860 | |
8c6a85e3 TB |
4861 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) |
4862 | gfc_set_default_type (e->symtree->n.sym, 0, NULL); | |
4863 | break; | |
6de9cd9a | 4864 | |
8c6a85e3 TB |
4865 | default: |
4866 | break; | |
6de9cd9a DN |
4867 | } |
4868 | ||
8c6a85e3 TB |
4869 | return false; |
4870 | } | |
6de9cd9a | 4871 | |
6de9cd9a | 4872 | |
8c6a85e3 TB |
4873 | static bool |
4874 | recursive_stmt_fcn (gfc_expr *e, gfc_symbol *sym) | |
4875 | { | |
4876 | return gfc_traverse_expr (e, sym, check_stmt_fcn, 0); | |
6de9cd9a DN |
4877 | } |
4878 | ||
cf2b3c22 | 4879 | |
8c6a85e3 TB |
4880 | /* Match a statement function declaration. It is so easy to match |
4881 | non-statement function statements with a MATCH_ERROR as opposed to | |
4882 | MATCH_NO that we suppress error message in most cases. */ | |
cf2b3c22 TB |
4883 | |
4884 | match | |
8c6a85e3 | 4885 | gfc_match_st_function (void) |
cf2b3c22 | 4886 | { |
fea70c99 | 4887 | gfc_error_buffer old_error; |
c4100eae | 4888 | |
8c6a85e3 TB |
4889 | gfc_symbol *sym; |
4890 | gfc_expr *expr; | |
cf2b3c22 | 4891 | match m; |
cf2b3c22 | 4892 | |
8c6a85e3 TB |
4893 | m = gfc_match_symbol (&sym, 0); |
4894 | if (m != MATCH_YES) | |
4895 | return m; | |
4896 | ||
fea70c99 | 4897 | gfc_push_error (&old_error); |
8c6a85e3 | 4898 | |
524af0d6 | 4899 | if (!gfc_add_procedure (&sym->attr, PROC_ST_FUNCTION, sym->name, NULL)) |
8c6a85e3 TB |
4900 | goto undo_error; |
4901 | ||
4902 | if (gfc_match_formal_arglist (sym, 1, 0) != MATCH_YES) | |
4903 | goto undo_error; | |
4904 | ||
4905 | m = gfc_match (" = %e%t", &expr); | |
4906 | if (m == MATCH_NO) | |
4907 | goto undo_error; | |
4908 | ||
fea70c99 | 4909 | gfc_free_error (&old_error); |
c4100eae | 4910 | |
8c6a85e3 TB |
4911 | if (m == MATCH_ERROR) |
4912 | return m; | |
4913 | ||
4914 | if (recursive_stmt_fcn (expr, sym)) | |
cf2b3c22 | 4915 | { |
8c6a85e3 | 4916 | gfc_error ("Statement function at %L is recursive", &expr->where); |
cf2b3c22 TB |
4917 | return MATCH_ERROR; |
4918 | } | |
4919 | ||
8c6a85e3 | 4920 | sym->value = expr; |
cf2b3c22 | 4921 | |
524af0d6 | 4922 | if (!gfc_notify_std (GFC_STD_F95_OBS, "Statement function at %C")) |
8c6a85e3 | 4923 | return MATCH_ERROR; |
cf2b3c22 | 4924 | |
8c6a85e3 | 4925 | return MATCH_YES; |
cf2b3c22 | 4926 | |
8c6a85e3 | 4927 | undo_error: |
fea70c99 | 4928 | gfc_pop_error (&old_error); |
8c6a85e3 TB |
4929 | return MATCH_NO; |
4930 | } | |
cf2b3c22 | 4931 | |
cf2b3c22 | 4932 | |
8c6a85e3 TB |
4933 | /***************** SELECT CASE subroutines ******************/ |
4934 | ||
4935 | /* Free a single case structure. */ | |
4936 | ||
4937 | static void | |
4938 | free_case (gfc_case *p) | |
4939 | { | |
4940 | if (p->low == p->high) | |
4941 | p->high = NULL; | |
4942 | gfc_free_expr (p->low); | |
4943 | gfc_free_expr (p->high); | |
4944 | free (p); | |
4945 | } | |
cf2b3c22 | 4946 | |
cf2b3c22 | 4947 | |
8c6a85e3 | 4948 | /* Free a list of case structures. */ |
cf2b3c22 | 4949 | |
8c6a85e3 TB |
4950 | void |
4951 | gfc_free_case_list (gfc_case *p) | |
4952 | { | |
4953 | gfc_case *q; | |
cf2b3c22 | 4954 | |
8c6a85e3 TB |
4955 | for (; p; p = q) |
4956 | { | |
4957 | q = p->next; | |
4958 | free_case (p); | |
4959 | } | |
cf2b3c22 TB |
4960 | } |
4961 | ||
4962 | ||
8c6a85e3 | 4963 | /* Match a single case selector. */ |
cf2b3c22 | 4964 | |
8c6a85e3 TB |
4965 | static match |
4966 | match_case_selector (gfc_case **cp) | |
cf2b3c22 | 4967 | { |
8c6a85e3 | 4968 | gfc_case *c; |
cf2b3c22 TB |
4969 | match m; |
4970 | ||
8c6a85e3 TB |
4971 | c = gfc_get_case (); |
4972 | c->where = gfc_current_locus; | |
cf2b3c22 | 4973 | |
8c6a85e3 | 4974 | if (gfc_match_char (':') == MATCH_YES) |
cf2b3c22 | 4975 | { |
8c6a85e3 | 4976 | m = gfc_match_init_expr (&c->high); |
cf2b3c22 | 4977 | if (m == MATCH_NO) |
8c6a85e3 TB |
4978 | goto need_expr; |
4979 | if (m == MATCH_ERROR) | |
4980 | goto cleanup; | |
4981 | } | |
4982 | else | |
4983 | { | |
4984 | m = gfc_match_init_expr (&c->low); | |
cf2b3c22 TB |
4985 | if (m == MATCH_ERROR) |
4986 | goto cleanup; | |
8c6a85e3 TB |
4987 | if (m == MATCH_NO) |
4988 | goto need_expr; | |
cf2b3c22 | 4989 | |
8c6a85e3 TB |
4990 | /* If we're not looking at a ':' now, make a range out of a single |
4991 | target. Else get the upper bound for the case range. */ | |
4992 | if (gfc_match_char (':') != MATCH_YES) | |
4993 | c->high = c->low; | |
4994 | else | |
4995 | { | |
4996 | m = gfc_match_init_expr (&c->high); | |
4997 | if (m == MATCH_ERROR) | |
4998 | goto cleanup; | |
4999 | /* MATCH_NO is fine. It's OK if nothing is there! */ | |
5000 | } | |
cf2b3c22 TB |
5001 | } |
5002 | ||
8c6a85e3 TB |
5003 | *cp = c; |
5004 | return MATCH_YES; | |
cf2b3c22 | 5005 | |
8c6a85e3 TB |
5006 | need_expr: |
5007 | gfc_error ("Expected initialization expression in CASE at %C"); | |
cf2b3c22 | 5008 | |
8c6a85e3 TB |
5009 | cleanup: |
5010 | free_case (c); | |
5011 | return MATCH_ERROR; | |
5012 | } | |
cf2b3c22 | 5013 | |
cf2b3c22 | 5014 | |
8c6a85e3 | 5015 | /* Match the end of a case statement. */ |
cf2b3c22 | 5016 | |
8c6a85e3 TB |
5017 | static match |
5018 | match_case_eos (void) | |
5019 | { | |
5020 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5021 | match m; | |
cf2b3c22 | 5022 | |
8c6a85e3 TB |
5023 | if (gfc_match_eos () == MATCH_YES) |
5024 | return MATCH_YES; | |
cf2b3c22 | 5025 | |
8c6a85e3 TB |
5026 | /* If the case construct doesn't have a case-construct-name, we |
5027 | should have matched the EOS. */ | |
5028 | if (!gfc_current_block ()) | |
5029 | return MATCH_NO; | |
cf2b3c22 | 5030 | |
8c6a85e3 | 5031 | gfc_gobble_whitespace (); |
cf2b3c22 | 5032 | |
8c6a85e3 TB |
5033 | m = gfc_match_name (name); |
5034 | if (m != MATCH_YES) | |
5035 | return m; | |
cf2b3c22 | 5036 | |
8c6a85e3 TB |
5037 | if (strcmp (name, gfc_current_block ()->name) != 0) |
5038 | { | |
a4d9b221 | 5039 | gfc_error ("Expected block name %qs of SELECT construct at %C", |
8c6a85e3 TB |
5040 | gfc_current_block ()->name); |
5041 | return MATCH_ERROR; | |
5042 | } | |
cf2b3c22 | 5043 | |
8c6a85e3 TB |
5044 | return gfc_match_eos (); |
5045 | } | |
cf2b3c22 | 5046 | |
6de9cd9a | 5047 | |
8c6a85e3 | 5048 | /* Match a SELECT statement. */ |
c874ae73 | 5049 | |
8c6a85e3 TB |
5050 | match |
5051 | gfc_match_select (void) | |
c874ae73 TS |
5052 | { |
5053 | gfc_expr *expr; | |
c874ae73 TS |
5054 | match m; |
5055 | ||
8c6a85e3 TB |
5056 | m = gfc_match_label (); |
5057 | if (m == MATCH_ERROR) | |
5058 | return m; | |
5059 | ||
5060 | m = gfc_match (" select case ( %e )%t", &expr); | |
c874ae73 TS |
5061 | if (m != MATCH_YES) |
5062 | return m; | |
5063 | ||
8c6a85e3 TB |
5064 | new_st.op = EXEC_SELECT; |
5065 | new_st.expr1 = expr; | |
c874ae73 | 5066 | |
8c6a85e3 TB |
5067 | return MATCH_YES; |
5068 | } | |
c874ae73 | 5069 | |
c874ae73 | 5070 | |
8f75db9f PT |
5071 | /* Transfer the selector typespec to the associate name. */ |
5072 | ||
5073 | static void | |
5074 | copy_ts_from_selector_to_associate (gfc_expr *associate, gfc_expr *selector) | |
5075 | { | |
5076 | gfc_ref *ref; | |
5077 | gfc_symbol *assoc_sym; | |
5078 | ||
5079 | assoc_sym = associate->symtree->n.sym; | |
5080 | ||
8f75db9f PT |
5081 | /* At this stage the expression rank and arrayspec dimensions have |
5082 | not been completely sorted out. We must get the expr2->rank | |
5083 | right here, so that the correct class container is obtained. */ | |
5084 | ref = selector->ref; | |
5085 | while (ref && ref->next) | |
5086 | ref = ref->next; | |
5087 | ||
a7a6a027 JW |
5088 | if (selector->ts.type == BT_CLASS && CLASS_DATA (selector)->as |
5089 | && ref && ref->type == REF_ARRAY) | |
8f75db9f | 5090 | { |
e4821cd8 PT |
5091 | /* Ensure that the array reference type is set. We cannot use |
5092 | gfc_resolve_expr at this point, so the usable parts of | |
5093 | resolve.c(resolve_array_ref) are employed to do it. */ | |
5094 | if (ref->u.ar.type == AR_UNKNOWN) | |
5095 | { | |
5096 | ref->u.ar.type = AR_ELEMENT; | |
a7a6a027 | 5097 | for (int i = 0; i < ref->u.ar.dimen + ref->u.ar.codimen; i++) |
e4821cd8 PT |
5098 | if (ref->u.ar.dimen_type[i] == DIMEN_RANGE |
5099 | || ref->u.ar.dimen_type[i] == DIMEN_VECTOR | |
5100 | || (ref->u.ar.dimen_type[i] == DIMEN_UNKNOWN | |
5101 | && ref->u.ar.start[i] && ref->u.ar.start[i]->rank)) | |
5102 | { | |
5103 | ref->u.ar.type = AR_SECTION; | |
5104 | break; | |
5105 | } | |
5106 | } | |
5107 | ||
8f75db9f PT |
5108 | if (ref->u.ar.type == AR_FULL) |
5109 | selector->rank = CLASS_DATA (selector)->as->rank; | |
5110 | else if (ref->u.ar.type == AR_SECTION) | |
5111 | selector->rank = ref->u.ar.dimen; | |
5112 | else | |
5113 | selector->rank = 0; | |
5114 | } | |
5115 | ||
a7a6a027 | 5116 | if (selector->rank) |
8f75db9f | 5117 | { |
a7a6a027 JW |
5118 | assoc_sym->attr.dimension = 1; |
5119 | assoc_sym->as = gfc_get_array_spec (); | |
5120 | assoc_sym->as->rank = selector->rank; | |
5121 | assoc_sym->as->type = AS_DEFERRED; | |
8f75db9f PT |
5122 | } |
5123 | else | |
a7a6a027 JW |
5124 | assoc_sym->as = NULL; |
5125 | ||
5126 | if (selector->ts.type == BT_CLASS) | |
8f75db9f PT |
5127 | { |
5128 | /* The correct class container has to be available. */ | |
8f75db9f PT |
5129 | assoc_sym->ts.type = BT_CLASS; |
5130 | assoc_sym->ts.u.derived = CLASS_DATA (selector)->ts.u.derived; | |
5131 | assoc_sym->attr.pointer = 1; | |
9b6da3c7 | 5132 | gfc_build_class_symbol (&assoc_sym->ts, &assoc_sym->attr, &assoc_sym->as); |
8f75db9f PT |
5133 | } |
5134 | } | |
5135 | ||
5136 | ||
8c6a85e3 | 5137 | /* Push the current selector onto the SELECT TYPE stack. */ |
c874ae73 | 5138 | |
8c6a85e3 TB |
5139 | static void |
5140 | select_type_push (gfc_symbol *sel) | |
5141 | { | |
5142 | gfc_select_type_stack *top = gfc_get_select_type_stack (); | |
5143 | top->selector = sel; | |
5144 | top->tmp = NULL; | |
5145 | top->prev = select_type_stack; | |
c874ae73 | 5146 | |
8c6a85e3 TB |
5147 | select_type_stack = top; |
5148 | } | |
c874ae73 | 5149 | |
c874ae73 | 5150 | |
8b704316 PT |
5151 | /* Set the temporary for the current intrinsic SELECT TYPE selector. */ |
5152 | ||
5153 | static gfc_symtree * | |
5154 | select_intrinsic_set_tmp (gfc_typespec *ts) | |
5155 | { | |
5156 | char name[GFC_MAX_SYMBOL_LEN]; | |
5157 | gfc_symtree *tmp; | |
5158 | int charlen = 0; | |
5159 | ||
5160 | if (ts->type == BT_CLASS || ts->type == BT_DERIVED) | |
5161 | return NULL; | |
5162 | ||
5163 | if (select_type_stack->selector->ts.type == BT_CLASS | |
5164 | && !select_type_stack->selector->attr.class_ok) | |
5165 | return NULL; | |
5166 | ||
5167 | if (ts->type == BT_CHARACTER && ts->u.cl && ts->u.cl->length | |
5168 | && ts->u.cl->length->expr_type == EXPR_CONSTANT) | |
5169 | charlen = mpz_get_si (ts->u.cl->length->value.integer); | |
5170 | ||
5171 | if (ts->type != BT_CHARACTER) | |
5172 | sprintf (name, "__tmp_%s_%d", gfc_basic_typename (ts->type), | |
5173 | ts->kind); | |
5174 | else | |
5175 | sprintf (name, "__tmp_%s_%d_%d", gfc_basic_typename (ts->type), | |
5176 | charlen, ts->kind); | |
5177 | ||
5178 | gfc_get_sym_tree (name, gfc_current_ns, &tmp, false); | |
5179 | gfc_add_type (tmp->n.sym, ts, NULL); | |
5180 | ||
5181 | /* Copy across the array spec to the selector. */ | |
5182 | if (select_type_stack->selector->ts.type == BT_CLASS | |
5183 | && (CLASS_DATA (select_type_stack->selector)->attr.dimension | |
5184 | || CLASS_DATA (select_type_stack->selector)->attr.codimension)) | |
5185 | { | |
5186 | tmp->n.sym->attr.pointer = 1; | |
5187 | tmp->n.sym->attr.dimension | |
5188 | = CLASS_DATA (select_type_stack->selector)->attr.dimension; | |
5189 | tmp->n.sym->attr.codimension | |
5190 | = CLASS_DATA (select_type_stack->selector)->attr.codimension; | |
5191 | tmp->n.sym->as | |
5192 | = gfc_copy_array_spec (CLASS_DATA (select_type_stack->selector)->as); | |
5193 | } | |
5194 | ||
5195 | gfc_set_sym_referenced (tmp->n.sym); | |
5196 | gfc_add_flavor (&tmp->n.sym->attr, FL_VARIABLE, name, NULL); | |
5197 | tmp->n.sym->attr.select_type_temporary = 1; | |
5198 | ||
5199 | return tmp; | |
5200 | } | |
5201 | ||
5202 | ||
fca04db3 | 5203 | /* Set up a temporary for the current TYPE IS / CLASS IS branch . */ |
c874ae73 | 5204 | |
fca04db3 JW |
5205 | static void |
5206 | select_type_set_tmp (gfc_typespec *ts) | |
8c6a85e3 TB |
5207 | { |
5208 | char name[GFC_MAX_SYMBOL_LEN]; | |
8b704316 | 5209 | gfc_symtree *tmp = NULL; |
8f75db9f | 5210 | |
fca04db3 | 5211 | if (!ts) |
8c6a85e3 | 5212 | { |
fca04db3 JW |
5213 | select_type_stack->tmp = NULL; |
5214 | return; | |
8c6a85e3 | 5215 | } |
8c6a85e3 | 5216 | |
8b704316 | 5217 | tmp = select_intrinsic_set_tmp (ts); |
c49ea23d | 5218 | |
8b704316 | 5219 | if (tmp == NULL) |
c49ea23d | 5220 | { |
4cc70466 PT |
5221 | if (!ts->u.derived) |
5222 | return; | |
5223 | ||
8b704316 PT |
5224 | if (ts->type == BT_CLASS) |
5225 | sprintf (name, "__tmp_class_%s", ts->u.derived->name); | |
5226 | else | |
5227 | sprintf (name, "__tmp_type_%s", ts->u.derived->name); | |
5228 | gfc_get_sym_tree (name, gfc_current_ns, &tmp, false); | |
5229 | gfc_add_type (tmp->n.sym, ts, NULL); | |
fca04db3 | 5230 | |
8b704316 PT |
5231 | if (select_type_stack->selector->ts.type == BT_CLASS |
5232 | && select_type_stack->selector->attr.class_ok) | |
fca04db3 | 5233 | { |
8b704316 PT |
5234 | tmp->n.sym->attr.pointer |
5235 | = CLASS_DATA (select_type_stack->selector)->attr.class_pointer; | |
5236 | ||
5237 | /* Copy across the array spec to the selector. */ | |
5238 | if (CLASS_DATA (select_type_stack->selector)->attr.dimension | |
5239 | || CLASS_DATA (select_type_stack->selector)->attr.codimension) | |
5240 | { | |
5241 | tmp->n.sym->attr.dimension | |
fca04db3 | 5242 | = CLASS_DATA (select_type_stack->selector)->attr.dimension; |
8b704316 | 5243 | tmp->n.sym->attr.codimension |
fca04db3 | 5244 | = CLASS_DATA (select_type_stack->selector)->attr.codimension; |
8b704316 | 5245 | tmp->n.sym->as |
fca04db3 | 5246 | = gfc_copy_array_spec (CLASS_DATA (select_type_stack->selector)->as); |
8b704316 | 5247 | } |
c49ea23d PT |
5248 | } |
5249 | ||
8c6a85e3 | 5250 | gfc_set_sym_referenced (tmp->n.sym); |
8c6a85e3 | 5251 | gfc_add_flavor (&tmp->n.sym->attr, FL_VARIABLE, name, NULL); |
7d40e49f | 5252 | tmp->n.sym->attr.select_type_temporary = 1; |
8f75db9f | 5253 | |
8c6a85e3 | 5254 | if (ts->type == BT_CLASS) |
fca04db3 | 5255 | gfc_build_class_symbol (&tmp->n.sym->ts, &tmp->n.sym->attr, |
9b6da3c7 | 5256 | &tmp->n.sym->as); |
8b704316 | 5257 | } |
8c6a85e3 TB |
5258 | |
5259 | /* Add an association for it, so the rest of the parser knows it is | |
5260 | an associate-name. The target will be set during resolution. */ | |
5261 | tmp->n.sym->assoc = gfc_get_association_list (); | |
5262 | tmp->n.sym->assoc->dangling = 1; | |
5263 | tmp->n.sym->assoc->st = tmp; | |
5264 | ||
5265 | select_type_stack->tmp = tmp; | |
c874ae73 TS |
5266 | } |
5267 | ||
8b704316 | 5268 | |
8c6a85e3 | 5269 | /* Match a SELECT TYPE statement. */ |
6de9cd9a DN |
5270 | |
5271 | match | |
8c6a85e3 | 5272 | gfc_match_select_type (void) |
6de9cd9a | 5273 | { |
8c6a85e3 TB |
5274 | gfc_expr *expr1, *expr2 = NULL; |
5275 | match m; | |
5276 | char name[GFC_MAX_SYMBOL_LEN]; | |
c49ea23d | 5277 | bool class_array; |
8f75db9f | 5278 | gfc_symbol *sym; |
6de9cd9a | 5279 | |
8c6a85e3 TB |
5280 | m = gfc_match_label (); |
5281 | if (m == MATCH_ERROR) | |
5282 | return m; | |
6de9cd9a | 5283 | |
8c6a85e3 | 5284 | m = gfc_match (" select type ( "); |
6de9cd9a DN |
5285 | if (m != MATCH_YES) |
5286 | return m; | |
5287 | ||
8c6a85e3 TB |
5288 | m = gfc_match (" %n => %e", name, &expr2); |
5289 | if (m == MATCH_YES) | |
5290 | { | |
5291 | expr1 = gfc_get_expr(); | |
5292 | expr1->expr_type = EXPR_VARIABLE; | |
5293 | if (gfc_get_sym_tree (name, NULL, &expr1->symtree, false)) | |
5294 | { | |
5295 | m = MATCH_ERROR; | |
5296 | goto cleanup; | |
5297 | } | |
8f75db9f PT |
5298 | |
5299 | sym = expr1->symtree->n.sym; | |
8c6a85e3 | 5300 | if (expr2->ts.type == BT_UNKNOWN) |
8f75db9f | 5301 | sym->attr.untyped = 1; |
8c6a85e3 | 5302 | else |
8f75db9f PT |
5303 | copy_ts_from_selector_to_associate (expr1, expr2); |
5304 | ||
5305 | sym->attr.flavor = FL_VARIABLE; | |
5306 | sym->attr.referenced = 1; | |
5307 | sym->attr.class_ok = 1; | |
8c6a85e3 TB |
5308 | } |
5309 | else | |
6de9cd9a | 5310 | { |
8c6a85e3 TB |
5311 | m = gfc_match (" %e ", &expr1); |
5312 | if (m != MATCH_YES) | |
36abe895 | 5313 | return m; |
6de9cd9a DN |
5314 | } |
5315 | ||
8c6a85e3 | 5316 | m = gfc_match (" )%t"); |
6de9cd9a | 5317 | if (m != MATCH_YES) |
a5e52264 MM |
5318 | { |
5319 | gfc_error ("parse error in SELECT TYPE statement at %C"); | |
5320 | goto cleanup; | |
5321 | } | |
8c6a85e3 | 5322 | |
c49ea23d PT |
5323 | /* This ghastly expression seems to be needed to distinguish a CLASS |
5324 | array, which can have a reference, from other expressions that | |
5325 | have references, such as derived type components, and are not | |
5326 | allowed by the standard. | |
ee3bea0b | 5327 | TODO: see if it is sufficient to exclude component and substring |
c49ea23d PT |
5328 | references. */ |
5329 | class_array = expr1->expr_type == EXPR_VARIABLE | |
ee3bea0b | 5330 | && expr1->ts.type == BT_CLASS |
c49ea23d PT |
5331 | && CLASS_DATA (expr1) |
5332 | && (strcmp (CLASS_DATA (expr1)->name, "_data") == 0) | |
cd99c23c TB |
5333 | && (CLASS_DATA (expr1)->attr.dimension |
5334 | || CLASS_DATA (expr1)->attr.codimension) | |
c49ea23d PT |
5335 | && expr1->ref |
5336 | && expr1->ref->type == REF_ARRAY | |
5337 | && expr1->ref->next == NULL; | |
5338 | ||
8c6a85e3 | 5339 | /* Check for F03:C811. */ |
c49ea23d PT |
5340 | if (!expr2 && (expr1->expr_type != EXPR_VARIABLE |
5341 | || (!class_array && expr1->ref != NULL))) | |
6de9cd9a | 5342 | { |
8c6a85e3 TB |
5343 | gfc_error ("Selector in SELECT TYPE at %C is not a named variable; " |
5344 | "use associate-name=>"); | |
5345 | m = MATCH_ERROR; | |
5346 | goto cleanup; | |
6de9cd9a DN |
5347 | } |
5348 | ||
8c6a85e3 TB |
5349 | new_st.op = EXEC_SELECT_TYPE; |
5350 | new_st.expr1 = expr1; | |
5351 | new_st.expr2 = expr2; | |
5352 | new_st.ext.block.ns = gfc_current_ns; | |
6de9cd9a | 5353 | |
8c6a85e3 | 5354 | select_type_push (expr1->symtree->n.sym); |
6de9cd9a DN |
5355 | |
5356 | return MATCH_YES; | |
8b704316 | 5357 | |
8c6a85e3 | 5358 | cleanup: |
36abe895 TB |
5359 | gfc_free_expr (expr1); |
5360 | gfc_free_expr (expr2); | |
8c6a85e3 | 5361 | return m; |
6de9cd9a DN |
5362 | } |
5363 | ||
5364 | ||
8c6a85e3 | 5365 | /* Match a CASE statement. */ |
6de9cd9a DN |
5366 | |
5367 | match | |
8c6a85e3 | 5368 | gfc_match_case (void) |
6de9cd9a | 5369 | { |
8c6a85e3 | 5370 | gfc_case *c, *head, *tail; |
6de9cd9a DN |
5371 | match m; |
5372 | ||
8c6a85e3 TB |
5373 | head = tail = NULL; |
5374 | ||
5375 | if (gfc_current_state () != COMP_SELECT) | |
6de9cd9a | 5376 | { |
8c6a85e3 | 5377 | gfc_error ("Unexpected CASE statement at %C"); |
6de9cd9a DN |
5378 | return MATCH_ERROR; |
5379 | } | |
5380 | ||
8c6a85e3 | 5381 | if (gfc_match ("% default") == MATCH_YES) |
6de9cd9a | 5382 | { |
8c6a85e3 | 5383 | m = match_case_eos (); |
6de9cd9a DN |
5384 | if (m == MATCH_NO) |
5385 | goto syntax; | |
5386 | if (m == MATCH_ERROR) | |
8c6a85e3 | 5387 | goto cleanup; |
6de9cd9a | 5388 | |
8c6a85e3 TB |
5389 | new_st.op = EXEC_SELECT; |
5390 | c = gfc_get_case (); | |
5391 | c->where = gfc_current_locus; | |
5392 | new_st.ext.block.case_list = c; | |
5393 | return MATCH_YES; | |
6de9cd9a DN |
5394 | } |
5395 | ||
8c6a85e3 TB |
5396 | if (gfc_match_char ('(') != MATCH_YES) |
5397 | goto syntax; | |
5398 | ||
5399 | for (;;) | |
690af379 | 5400 | { |
8c6a85e3 | 5401 | if (match_case_selector (&c) == MATCH_ERROR) |
6de9cd9a DN |
5402 | goto cleanup; |
5403 | ||
8c6a85e3 TB |
5404 | if (head == NULL) |
5405 | head = c; | |
5406 | else | |
5407 | tail->next = c; | |
6de9cd9a | 5408 | |
8c6a85e3 TB |
5409 | tail = c; |
5410 | ||
5411 | if (gfc_match_char (')') == MATCH_YES) | |
5412 | break; | |
5413 | if (gfc_match_char (',') != MATCH_YES) | |
5414 | goto syntax; | |
6de9cd9a DN |
5415 | } |
5416 | ||
8c6a85e3 TB |
5417 | m = match_case_eos (); |
5418 | if (m == MATCH_NO) | |
5419 | goto syntax; | |
5420 | if (m == MATCH_ERROR) | |
5421 | goto cleanup; | |
5422 | ||
5423 | new_st.op = EXEC_SELECT; | |
5424 | new_st.ext.block.case_list = head; | |
5425 | ||
6de9cd9a DN |
5426 | return MATCH_YES; |
5427 | ||
5428 | syntax: | |
8c6a85e3 | 5429 | gfc_error ("Syntax error in CASE specification at %C"); |
6de9cd9a DN |
5430 | |
5431 | cleanup: | |
8c6a85e3 | 5432 | gfc_free_case_list (head); /* new_st is cleaned up in parse.c. */ |
6de9cd9a DN |
5433 | return MATCH_ERROR; |
5434 | } | |
5435 | ||
5436 | ||
8c6a85e3 | 5437 | /* Match a TYPE IS statement. */ |
6de9cd9a | 5438 | |
8c6a85e3 TB |
5439 | match |
5440 | gfc_match_type_is (void) | |
6de9cd9a | 5441 | { |
8c6a85e3 TB |
5442 | gfc_case *c = NULL; |
5443 | match m; | |
6de9cd9a | 5444 | |
8c6a85e3 | 5445 | if (gfc_current_state () != COMP_SELECT_TYPE) |
6de9cd9a | 5446 | { |
8c6a85e3 TB |
5447 | gfc_error ("Unexpected TYPE IS statement at %C"); |
5448 | return MATCH_ERROR; | |
6de9cd9a | 5449 | } |
6de9cd9a | 5450 | |
8c6a85e3 TB |
5451 | if (gfc_match_char ('(') != MATCH_YES) |
5452 | goto syntax; | |
6de9cd9a | 5453 | |
8c6a85e3 TB |
5454 | c = gfc_get_case (); |
5455 | c->where = gfc_current_locus; | |
6de9cd9a | 5456 | |
ef701bbe SK |
5457 | m = gfc_match_type_spec (&c->ts); |
5458 | if (m == MATCH_NO) | |
5459 | goto syntax; | |
5460 | if (m == MATCH_ERROR) | |
6de9cd9a DN |
5461 | goto cleanup; |
5462 | ||
8c6a85e3 | 5463 | if (gfc_match_char (')') != MATCH_YES) |
6de9cd9a DN |
5464 | goto syntax; |
5465 | ||
8c6a85e3 | 5466 | m = match_case_eos (); |
6de9cd9a DN |
5467 | if (m == MATCH_NO) |
5468 | goto syntax; | |
5469 | if (m == MATCH_ERROR) | |
5470 | goto cleanup; | |
5471 | ||
8c6a85e3 TB |
5472 | new_st.op = EXEC_SELECT_TYPE; |
5473 | new_st.ext.block.case_list = c; | |
6de9cd9a | 5474 | |
8b704316 PT |
5475 | if (c->ts.type == BT_DERIVED && c->ts.u.derived |
5476 | && (c->ts.u.derived->attr.sequence | |
5477 | || c->ts.u.derived->attr.is_bind_c)) | |
5478 | { | |
5479 | gfc_error ("The type-spec shall not specify a sequence derived " | |
5480 | "type or a type with the BIND attribute in SELECT " | |
5481 | "TYPE at %C [F2003:C815]"); | |
5482 | return MATCH_ERROR; | |
5483 | } | |
5484 | ||
8c6a85e3 TB |
5485 | /* Create temporary variable. */ |
5486 | select_type_set_tmp (&c->ts); | |
31708dc6 | 5487 | |
6de9cd9a DN |
5488 | return MATCH_YES; |
5489 | ||
5490 | syntax: | |
8c6a85e3 | 5491 | gfc_error ("Syntax error in TYPE IS specification at %C"); |
6de9cd9a DN |
5492 | |
5493 | cleanup: | |
8c6a85e3 TB |
5494 | if (c != NULL) |
5495 | gfc_free_case_list (c); /* new_st is cleaned up in parse.c. */ | |
5496 | return MATCH_ERROR; | |
5497 | } | |
d68bd5a8 | 5498 | |
c874ae73 | 5499 | |
8c6a85e3 TB |
5500 | /* Match a CLASS IS or CLASS DEFAULT statement. */ |
5501 | ||
5502 | match | |
5503 | gfc_match_class_is (void) | |
5504 | { | |
5505 | gfc_case *c = NULL; | |
5506 | match m; | |
5507 | ||
5508 | if (gfc_current_state () != COMP_SELECT_TYPE) | |
5509 | return MATCH_NO; | |
5510 | ||
5511 | if (gfc_match ("% default") == MATCH_YES) | |
5512 | { | |
5513 | m = match_case_eos (); | |
6de9cd9a DN |
5514 | if (m == MATCH_NO) |
5515 | goto syntax; | |
5516 | if (m == MATCH_ERROR) | |
5517 | goto cleanup; | |
5518 | ||
8c6a85e3 TB |
5519 | new_st.op = EXEC_SELECT_TYPE; |
5520 | c = gfc_get_case (); | |
5521 | c->where = gfc_current_locus; | |
5522 | c->ts.type = BT_UNKNOWN; | |
5523 | new_st.ext.block.case_list = c; | |
5524 | select_type_set_tmp (NULL); | |
5525 | return MATCH_YES; | |
6de9cd9a DN |
5526 | } |
5527 | ||
8c6a85e3 TB |
5528 | m = gfc_match ("% is"); |
5529 | if (m == MATCH_NO) | |
6de9cd9a | 5530 | goto syntax; |
8c6a85e3 TB |
5531 | if (m == MATCH_ERROR) |
5532 | goto cleanup; | |
5533 | ||
5534 | if (gfc_match_char ('(') != MATCH_YES) | |
5535 | goto syntax; | |
5536 | ||
5537 | c = gfc_get_case (); | |
5538 | c->where = gfc_current_locus; | |
5539 | ||
ef701bbe SK |
5540 | m = match_derived_type_spec (&c->ts); |
5541 | if (m == MATCH_NO) | |
5542 | goto syntax; | |
5543 | if (m == MATCH_ERROR) | |
8c6a85e3 TB |
5544 | goto cleanup; |
5545 | ||
5546 | if (c->ts.type == BT_DERIVED) | |
5547 | c->ts.type = BT_CLASS; | |
5548 | ||
5549 | if (gfc_match_char (')') != MATCH_YES) | |
5550 | goto syntax; | |
5551 | ||
5552 | m = match_case_eos (); | |
5553 | if (m == MATCH_NO) | |
5554 | goto syntax; | |
5555 | if (m == MATCH_ERROR) | |
5556 | goto cleanup; | |
5557 | ||
5558 | new_st.op = EXEC_SELECT_TYPE; | |
5559 | new_st.ext.block.case_list = c; | |
8b704316 | 5560 | |
8c6a85e3 TB |
5561 | /* Create temporary variable. */ |
5562 | select_type_set_tmp (&c->ts); | |
6de9cd9a | 5563 | |
c874ae73 TS |
5564 | return MATCH_YES; |
5565 | ||
5566 | syntax: | |
8c6a85e3 | 5567 | gfc_error ("Syntax error in CLASS IS specification at %C"); |
c874ae73 TS |
5568 | |
5569 | cleanup: | |
8c6a85e3 TB |
5570 | if (c != NULL) |
5571 | gfc_free_case_list (c); /* new_st is cleaned up in parse.c. */ | |
c874ae73 TS |
5572 | return MATCH_ERROR; |
5573 | } | |
5574 | ||
8c6a85e3 TB |
5575 | |
5576 | /********************* WHERE subroutines ********************/ | |
5577 | ||
8b704316 | 5578 | /* Match the rest of a simple WHERE statement that follows an IF statement. |
8c6a85e3 | 5579 | */ |
c874ae73 TS |
5580 | |
5581 | static match | |
8c6a85e3 | 5582 | match_simple_where (void) |
c874ae73 | 5583 | { |
8c6a85e3 | 5584 | gfc_expr *expr; |
c874ae73 TS |
5585 | gfc_code *c; |
5586 | match m; | |
5587 | ||
8c6a85e3 | 5588 | m = gfc_match (" ( %e )", &expr); |
c874ae73 | 5589 | if (m != MATCH_YES) |
8c6a85e3 | 5590 | return m; |
c874ae73 TS |
5591 | |
5592 | m = gfc_match_assignment (); | |
8c6a85e3 TB |
5593 | if (m == MATCH_NO) |
5594 | goto syntax; | |
c874ae73 TS |
5595 | if (m == MATCH_ERROR) |
5596 | goto cleanup; | |
c874ae73 TS |
5597 | |
5598 | if (gfc_match_eos () != MATCH_YES) | |
5599 | goto syntax; | |
5600 | ||
11e5274a | 5601 | c = gfc_get_code (EXEC_WHERE); |
8c6a85e3 | 5602 | c->expr1 = expr; |
8c6a85e3 | 5603 | |
11e5274a | 5604 | c->next = XCNEW (gfc_code); |
8c6a85e3 | 5605 | *c->next = new_st; |
c874ae73 | 5606 | gfc_clear_new_st (); |
c874ae73 | 5607 | |
8c6a85e3 TB |
5608 | new_st.op = EXEC_WHERE; |
5609 | new_st.block = c; | |
c874ae73 TS |
5610 | |
5611 | return MATCH_YES; | |
5612 | ||
5613 | syntax: | |
8c6a85e3 | 5614 | gfc_syntax_error (ST_WHERE); |
c874ae73 TS |
5615 | |
5616 | cleanup: | |
8c6a85e3 | 5617 | gfc_free_expr (expr); |
c874ae73 TS |
5618 | return MATCH_ERROR; |
5619 | } | |
5620 | ||
5621 | ||
8c6a85e3 | 5622 | /* Match a WHERE statement. */ |
c874ae73 TS |
5623 | |
5624 | match | |
8c6a85e3 | 5625 | gfc_match_where (gfc_statement *st) |
c874ae73 | 5626 | { |
8c6a85e3 | 5627 | gfc_expr *expr; |
c874ae73 | 5628 | match m0, m; |
8c6a85e3 | 5629 | gfc_code *c; |
c874ae73 TS |
5630 | |
5631 | m0 = gfc_match_label (); | |
5632 | if (m0 == MATCH_ERROR) | |
8c6a85e3 | 5633 | return m0; |
c874ae73 | 5634 | |
8c6a85e3 | 5635 | m = gfc_match (" where ( %e )", &expr); |
c874ae73 TS |
5636 | if (m != MATCH_YES) |
5637 | return m; | |
5638 | ||
6de9cd9a DN |
5639 | if (gfc_match_eos () == MATCH_YES) |
5640 | { | |
8c6a85e3 TB |
5641 | *st = ST_WHERE_BLOCK; |
5642 | new_st.op = EXEC_WHERE; | |
5643 | new_st.expr1 = expr; | |
6de9cd9a DN |
5644 | return MATCH_YES; |
5645 | } | |
5646 | ||
5647 | m = gfc_match_assignment (); | |
6de9cd9a | 5648 | if (m == MATCH_NO) |
8c6a85e3 TB |
5649 | gfc_syntax_error (ST_WHERE); |
5650 | ||
5651 | if (m != MATCH_YES) | |
6de9cd9a | 5652 | { |
8c6a85e3 TB |
5653 | gfc_free_expr (expr); |
5654 | return MATCH_ERROR; | |
6de9cd9a DN |
5655 | } |
5656 | ||
8c6a85e3 TB |
5657 | /* We've got a simple WHERE statement. */ |
5658 | *st = ST_WHERE; | |
11e5274a | 5659 | c = gfc_get_code (EXEC_WHERE); |
8c6a85e3 | 5660 | c->expr1 = expr; |
8c6a85e3 | 5661 | |
11e5274a | 5662 | c->next = XCNEW (gfc_code); |
8c6a85e3 | 5663 | *c->next = new_st; |
6de9cd9a | 5664 | gfc_clear_new_st (); |
6de9cd9a | 5665 | |
8c6a85e3 TB |
5666 | new_st.op = EXEC_WHERE; |
5667 | new_st.block = c; | |
5668 | ||
5669 | return MATCH_YES; | |
5670 | } | |
5671 | ||
5672 | ||
5673 | /* Match an ELSEWHERE statement. We leave behind a WHERE node in | |
5674 | new_st if successful. */ | |
5675 | ||
5676 | match | |
5677 | gfc_match_elsewhere (void) | |
5678 | { | |
5679 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5680 | gfc_expr *expr; | |
5681 | match m; | |
5682 | ||
5683 | if (gfc_current_state () != COMP_WHERE) | |
5684 | { | |
5685 | gfc_error ("ELSEWHERE statement at %C not enclosed in WHERE block"); | |
5686 | return MATCH_ERROR; | |
5687 | } | |
5688 | ||
5689 | expr = NULL; | |
5690 | ||
5691 | if (gfc_match_char ('(') == MATCH_YES) | |
5692 | { | |
5693 | m = gfc_match_expr (&expr); | |
5694 | if (m == MATCH_NO) | |
5695 | goto syntax; | |
5696 | if (m == MATCH_ERROR) | |
5697 | return MATCH_ERROR; | |
5698 | ||
5699 | if (gfc_match_char (')') != MATCH_YES) | |
5700 | goto syntax; | |
5701 | } | |
5702 | ||
5703 | if (gfc_match_eos () != MATCH_YES) | |
5704 | { | |
5705 | /* Only makes sense if we have a where-construct-name. */ | |
5706 | if (!gfc_current_block ()) | |
5707 | { | |
5708 | m = MATCH_ERROR; | |
5709 | goto cleanup; | |
5710 | } | |
5711 | /* Better be a name at this point. */ | |
5712 | m = gfc_match_name (name); | |
5713 | if (m == MATCH_NO) | |
5714 | goto syntax; | |
5715 | if (m == MATCH_ERROR) | |
5716 | goto cleanup; | |
5717 | ||
5718 | if (gfc_match_eos () != MATCH_YES) | |
5719 | goto syntax; | |
5720 | ||
5721 | if (strcmp (name, gfc_current_block ()->name) != 0) | |
5722 | { | |
a4d9b221 | 5723 | gfc_error ("Label %qs at %C doesn't match WHERE label %qs", |
8c6a85e3 TB |
5724 | name, gfc_current_block ()->name); |
5725 | goto cleanup; | |
5726 | } | |
5727 | } | |
5728 | ||
5729 | new_st.op = EXEC_WHERE; | |
5730 | new_st.expr1 = expr; | |
6de9cd9a DN |
5731 | return MATCH_YES; |
5732 | ||
5733 | syntax: | |
8c6a85e3 | 5734 | gfc_syntax_error (ST_ELSEWHERE); |
6de9cd9a DN |
5735 | |
5736 | cleanup: | |
8c6a85e3 TB |
5737 | gfc_free_expr (expr); |
5738 | return MATCH_ERROR; | |
6de9cd9a | 5739 | } |