]>
Commit | Line | Data |
---|---|---|
6de9cd9a | 1 | /* Matching subroutines in all sizes, shapes and colors. |
b7e75771 | 2 | Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, |
62603fae | 3 | 2009, 2010, 2011, 2012 |
f1f39033 | 4 | Free Software Foundation, Inc. |
6de9cd9a DN |
5 | Contributed by Andy Vaught |
6 | ||
9fc4d79b | 7 | This file is part of GCC. |
6de9cd9a | 8 | |
9fc4d79b TS |
9 | GCC is free software; you can redistribute it and/or modify it under |
10 | the terms of the GNU General Public License as published by the Free | |
d234d788 | 11 | Software Foundation; either version 3, or (at your option) any later |
9fc4d79b | 12 | version. |
6de9cd9a | 13 | |
9fc4d79b TS |
14 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
15 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
16 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
17 | for more details. | |
6de9cd9a DN |
18 | |
19 | You should have received a copy of the GNU General Public License | |
d234d788 NC |
20 | along with GCC; see the file COPYING3. If not see |
21 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a | 22 | |
6de9cd9a DN |
23 | #include "config.h" |
24 | #include "system.h" | |
25 | #include "flags.h" | |
6de9cd9a DN |
26 | #include "gfortran.h" |
27 | #include "match.h" | |
28 | #include "parse.h" | |
62603fae | 29 | #include "tree.h" |
6de9cd9a | 30 | |
837c4b78 | 31 | int gfc_matching_ptr_assignment = 0; |
8fb74da4 | 32 | int gfc_matching_procptr_assignment = 0; |
3df684e2 | 33 | bool gfc_matching_prefix = false; |
6de9cd9a | 34 | |
7431bf06 JW |
35 | /* Stack of SELECT TYPE statements. */ |
36 | gfc_select_type_stack *select_type_stack = NULL; | |
cf2b3c22 | 37 | |
ba3ba492 RS |
38 | /* For debugging and diagnostic purposes. Return the textual representation |
39 | of the intrinsic operator OP. */ | |
40 | const char * | |
41 | gfc_op2string (gfc_intrinsic_op op) | |
42 | { | |
43 | switch (op) | |
44 | { | |
45 | case INTRINSIC_UPLUS: | |
46 | case INTRINSIC_PLUS: | |
47 | return "+"; | |
48 | ||
49 | case INTRINSIC_UMINUS: | |
50 | case INTRINSIC_MINUS: | |
51 | return "-"; | |
52 | ||
53 | case INTRINSIC_POWER: | |
54 | return "**"; | |
55 | case INTRINSIC_CONCAT: | |
56 | return "//"; | |
57 | case INTRINSIC_TIMES: | |
58 | return "*"; | |
59 | case INTRINSIC_DIVIDE: | |
60 | return "/"; | |
61 | ||
62 | case INTRINSIC_AND: | |
63 | return ".and."; | |
64 | case INTRINSIC_OR: | |
65 | return ".or."; | |
66 | case INTRINSIC_EQV: | |
67 | return ".eqv."; | |
68 | case INTRINSIC_NEQV: | |
69 | return ".neqv."; | |
70 | ||
71 | case INTRINSIC_EQ_OS: | |
72 | return ".eq."; | |
73 | case INTRINSIC_EQ: | |
74 | return "=="; | |
75 | case INTRINSIC_NE_OS: | |
76 | return ".ne."; | |
77 | case INTRINSIC_NE: | |
78 | return "/="; | |
79 | case INTRINSIC_GE_OS: | |
80 | return ".ge."; | |
81 | case INTRINSIC_GE: | |
82 | return ">="; | |
83 | case INTRINSIC_LE_OS: | |
84 | return ".le."; | |
85 | case INTRINSIC_LE: | |
86 | return "<="; | |
87 | case INTRINSIC_LT_OS: | |
88 | return ".lt."; | |
89 | case INTRINSIC_LT: | |
90 | return "<"; | |
91 | case INTRINSIC_GT_OS: | |
92 | return ".gt."; | |
93 | case INTRINSIC_GT: | |
94 | return ">"; | |
95 | case INTRINSIC_NOT: | |
96 | return ".not."; | |
97 | ||
98 | case INTRINSIC_ASSIGN: | |
99 | return "="; | |
100 | ||
101 | case INTRINSIC_PARENTHESES: | |
102 | return "parens"; | |
103 | ||
104 | default: | |
105 | break; | |
106 | } | |
107 | ||
108 | gfc_internal_error ("gfc_op2string(): Bad code"); | |
109 | /* Not reached. */ | |
110 | } | |
111 | ||
6de9cd9a DN |
112 | |
113 | /******************** Generic matching subroutines ************************/ | |
114 | ||
f9b9fb82 JD |
115 | /* This function scans the current statement counting the opened and closed |
116 | parenthesis to make sure they are balanced. */ | |
117 | ||
118 | match | |
119 | gfc_match_parens (void) | |
120 | { | |
121 | locus old_loc, where; | |
696abb30 JD |
122 | int count; |
123 | gfc_instring instring; | |
8fc541d3 | 124 | gfc_char_t c, quote; |
f9b9fb82 JD |
125 | |
126 | old_loc = gfc_current_locus; | |
127 | count = 0; | |
696abb30 | 128 | instring = NONSTRING; |
f9b9fb82 JD |
129 | quote = ' '; |
130 | ||
131 | for (;;) | |
132 | { | |
133 | c = gfc_next_char_literal (instring); | |
134 | if (c == '\n') | |
135 | break; | |
136 | if (quote == ' ' && ((c == '\'') || (c == '"'))) | |
137 | { | |
8fc541d3 | 138 | quote = c; |
696abb30 | 139 | instring = INSTRING_WARN; |
f9b9fb82 JD |
140 | continue; |
141 | } | |
142 | if (quote != ' ' && c == quote) | |
143 | { | |
144 | quote = ' '; | |
696abb30 | 145 | instring = NONSTRING; |
f9b9fb82 JD |
146 | continue; |
147 | } | |
148 | ||
149 | if (c == '(' && quote == ' ') | |
150 | { | |
151 | count++; | |
152 | where = gfc_current_locus; | |
153 | } | |
154 | if (c == ')' && quote == ' ') | |
155 | { | |
156 | count--; | |
157 | where = gfc_current_locus; | |
158 | } | |
159 | } | |
160 | ||
161 | gfc_current_locus = old_loc; | |
162 | ||
163 | if (count > 0) | |
164 | { | |
acb388a0 | 165 | gfc_error ("Missing ')' in statement at or before %L", &where); |
f9b9fb82 JD |
166 | return MATCH_ERROR; |
167 | } | |
168 | if (count < 0) | |
169 | { | |
acb388a0 | 170 | gfc_error ("Missing '(' in statement at or before %L", &where); |
f9b9fb82 JD |
171 | return MATCH_ERROR; |
172 | } | |
173 | ||
174 | return MATCH_YES; | |
175 | } | |
176 | ||
177 | ||
a88a266c SK |
178 | /* See if the next character is a special character that has |
179 | escaped by a \ via the -fbackslash option. */ | |
180 | ||
181 | match | |
8fc541d3 | 182 | gfc_match_special_char (gfc_char_t *res) |
a88a266c | 183 | { |
8fc541d3 FXC |
184 | int len, i; |
185 | gfc_char_t c, n; | |
a88a266c SK |
186 | match m; |
187 | ||
188 | m = MATCH_YES; | |
189 | ||
696abb30 | 190 | switch ((c = gfc_next_char_literal (INSTRING_WARN))) |
a88a266c SK |
191 | { |
192 | case 'a': | |
8fc541d3 | 193 | *res = '\a'; |
a88a266c SK |
194 | break; |
195 | case 'b': | |
8fc541d3 | 196 | *res = '\b'; |
a88a266c SK |
197 | break; |
198 | case 't': | |
8fc541d3 | 199 | *res = '\t'; |
a88a266c SK |
200 | break; |
201 | case 'f': | |
8fc541d3 | 202 | *res = '\f'; |
a88a266c SK |
203 | break; |
204 | case 'n': | |
8fc541d3 | 205 | *res = '\n'; |
a88a266c SK |
206 | break; |
207 | case 'r': | |
8fc541d3 | 208 | *res = '\r'; |
a88a266c SK |
209 | break; |
210 | case 'v': | |
8fc541d3 | 211 | *res = '\v'; |
a88a266c SK |
212 | break; |
213 | case '\\': | |
8fc541d3 | 214 | *res = '\\'; |
a88a266c SK |
215 | break; |
216 | case '0': | |
8fc541d3 FXC |
217 | *res = '\0'; |
218 | break; | |
219 | ||
220 | case 'x': | |
221 | case 'u': | |
222 | case 'U': | |
223 | /* Hexadecimal form of wide characters. */ | |
224 | len = (c == 'x' ? 2 : (c == 'u' ? 4 : 8)); | |
225 | n = 0; | |
226 | for (i = 0; i < len; i++) | |
227 | { | |
228 | char buf[2] = { '\0', '\0' }; | |
229 | ||
696abb30 | 230 | c = gfc_next_char_literal (INSTRING_WARN); |
8fc541d3 FXC |
231 | if (!gfc_wide_fits_in_byte (c) |
232 | || !gfc_check_digit ((unsigned char) c, 16)) | |
233 | return MATCH_NO; | |
234 | ||
235 | buf[0] = (unsigned char) c; | |
236 | n = n << 4; | |
237 | n += strtol (buf, NULL, 16); | |
238 | } | |
239 | *res = n; | |
a88a266c | 240 | break; |
8fc541d3 | 241 | |
a88a266c SK |
242 | default: |
243 | /* Unknown backslash codes are simply not expanded. */ | |
244 | m = MATCH_NO; | |
245 | break; | |
246 | } | |
247 | ||
248 | return m; | |
249 | } | |
250 | ||
251 | ||
6de9cd9a DN |
252 | /* In free form, match at least one space. Always matches in fixed |
253 | form. */ | |
254 | ||
255 | match | |
256 | gfc_match_space (void) | |
257 | { | |
258 | locus old_loc; | |
8fc541d3 | 259 | char c; |
6de9cd9a | 260 | |
d4fa05b9 | 261 | if (gfc_current_form == FORM_FIXED) |
6de9cd9a DN |
262 | return MATCH_YES; |
263 | ||
63645982 | 264 | old_loc = gfc_current_locus; |
6de9cd9a | 265 | |
8fc541d3 | 266 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
267 | if (!gfc_is_whitespace (c)) |
268 | { | |
63645982 | 269 | gfc_current_locus = old_loc; |
6de9cd9a DN |
270 | return MATCH_NO; |
271 | } | |
272 | ||
273 | gfc_gobble_whitespace (); | |
274 | ||
275 | return MATCH_YES; | |
276 | } | |
277 | ||
278 | ||
279 | /* Match an end of statement. End of statement is optional | |
280 | whitespace, followed by a ';' or '\n' or comment '!'. If a | |
281 | semicolon is found, we continue to eat whitespace and semicolons. */ | |
282 | ||
283 | match | |
284 | gfc_match_eos (void) | |
285 | { | |
286 | locus old_loc; | |
8fc541d3 FXC |
287 | int flag; |
288 | char c; | |
6de9cd9a DN |
289 | |
290 | flag = 0; | |
291 | ||
292 | for (;;) | |
293 | { | |
63645982 | 294 | old_loc = gfc_current_locus; |
6de9cd9a DN |
295 | gfc_gobble_whitespace (); |
296 | ||
8fc541d3 | 297 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
298 | switch (c) |
299 | { | |
300 | case '!': | |
301 | do | |
302 | { | |
8fc541d3 | 303 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
304 | } |
305 | while (c != '\n'); | |
306 | ||
66e4ab31 | 307 | /* Fall through. */ |
6de9cd9a DN |
308 | |
309 | case '\n': | |
310 | return MATCH_YES; | |
311 | ||
312 | case ';': | |
313 | flag = 1; | |
314 | continue; | |
315 | } | |
316 | ||
317 | break; | |
318 | } | |
319 | ||
63645982 | 320 | gfc_current_locus = old_loc; |
6de9cd9a DN |
321 | return (flag) ? MATCH_YES : MATCH_NO; |
322 | } | |
323 | ||
324 | ||
325 | /* Match a literal integer on the input, setting the value on | |
326 | MATCH_YES. Literal ints occur in kind-parameters as well as | |
5cf54585 TS |
327 | old-style character length specifications. If cnt is non-NULL it |
328 | will be set to the number of digits. */ | |
6de9cd9a DN |
329 | |
330 | match | |
8a8f7eca | 331 | gfc_match_small_literal_int (int *value, int *cnt) |
6de9cd9a DN |
332 | { |
333 | locus old_loc; | |
334 | char c; | |
8a8f7eca | 335 | int i, j; |
6de9cd9a | 336 | |
63645982 | 337 | old_loc = gfc_current_locus; |
6de9cd9a | 338 | |
8fc541d3 | 339 | *value = -1; |
6de9cd9a | 340 | gfc_gobble_whitespace (); |
8fc541d3 | 341 | c = gfc_next_ascii_char (); |
5cf54585 TS |
342 | if (cnt) |
343 | *cnt = 0; | |
6de9cd9a DN |
344 | |
345 | if (!ISDIGIT (c)) | |
346 | { | |
63645982 | 347 | gfc_current_locus = old_loc; |
6de9cd9a DN |
348 | return MATCH_NO; |
349 | } | |
350 | ||
351 | i = c - '0'; | |
8a8f7eca | 352 | j = 1; |
6de9cd9a DN |
353 | |
354 | for (;;) | |
355 | { | |
63645982 | 356 | old_loc = gfc_current_locus; |
8fc541d3 | 357 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
358 | |
359 | if (!ISDIGIT (c)) | |
360 | break; | |
361 | ||
362 | i = 10 * i + c - '0'; | |
8a8f7eca | 363 | j++; |
6de9cd9a DN |
364 | |
365 | if (i > 99999999) | |
366 | { | |
367 | gfc_error ("Integer too large at %C"); | |
368 | return MATCH_ERROR; | |
369 | } | |
370 | } | |
371 | ||
63645982 | 372 | gfc_current_locus = old_loc; |
6de9cd9a DN |
373 | |
374 | *value = i; | |
5cf54585 TS |
375 | if (cnt) |
376 | *cnt = j; | |
6de9cd9a DN |
377 | return MATCH_YES; |
378 | } | |
379 | ||
380 | ||
381 | /* Match a small, constant integer expression, like in a kind | |
382 | statement. On MATCH_YES, 'value' is set. */ | |
383 | ||
384 | match | |
385 | gfc_match_small_int (int *value) | |
386 | { | |
387 | gfc_expr *expr; | |
388 | const char *p; | |
389 | match m; | |
390 | int i; | |
391 | ||
392 | m = gfc_match_expr (&expr); | |
393 | if (m != MATCH_YES) | |
394 | return m; | |
395 | ||
396 | p = gfc_extract_int (expr, &i); | |
397 | gfc_free_expr (expr); | |
398 | ||
399 | if (p != NULL) | |
400 | { | |
401 | gfc_error (p); | |
402 | m = MATCH_ERROR; | |
403 | } | |
404 | ||
405 | *value = i; | |
406 | return m; | |
407 | } | |
408 | ||
409 | ||
a8b3b0b6 CR |
410 | /* This function is the same as the gfc_match_small_int, except that |
411 | we're keeping the pointer to the expr. This function could just be | |
412 | removed and the previously mentioned one modified, though all calls | |
413 | to it would have to be modified then (and there were a number of | |
414 | them). Return MATCH_ERROR if fail to extract the int; otherwise, | |
415 | return the result of gfc_match_expr(). The expr (if any) that was | |
416 | matched is returned in the parameter expr. */ | |
417 | ||
418 | match | |
419 | gfc_match_small_int_expr (int *value, gfc_expr **expr) | |
420 | { | |
421 | const char *p; | |
422 | match m; | |
423 | int i; | |
424 | ||
425 | m = gfc_match_expr (expr); | |
426 | if (m != MATCH_YES) | |
427 | return m; | |
428 | ||
429 | p = gfc_extract_int (*expr, &i); | |
430 | ||
431 | if (p != NULL) | |
432 | { | |
433 | gfc_error (p); | |
434 | m = MATCH_ERROR; | |
435 | } | |
436 | ||
437 | *value = i; | |
438 | return m; | |
439 | } | |
440 | ||
441 | ||
6de9cd9a DN |
442 | /* Matches a statement label. Uses gfc_match_small_literal_int() to |
443 | do most of the work. */ | |
444 | ||
445 | match | |
b251af97 | 446 | gfc_match_st_label (gfc_st_label **label) |
6de9cd9a DN |
447 | { |
448 | locus old_loc; | |
449 | match m; | |
8a8f7eca | 450 | int i, cnt; |
6de9cd9a | 451 | |
63645982 | 452 | old_loc = gfc_current_locus; |
6de9cd9a | 453 | |
8a8f7eca | 454 | m = gfc_match_small_literal_int (&i, &cnt); |
6de9cd9a DN |
455 | if (m != MATCH_YES) |
456 | return m; | |
457 | ||
8a8f7eca | 458 | if (cnt > 5) |
6de9cd9a | 459 | { |
8a8f7eca SK |
460 | gfc_error ("Too many digits in statement label at %C"); |
461 | goto cleanup; | |
6de9cd9a DN |
462 | } |
463 | ||
a34a91f0 | 464 | if (i == 0) |
8a8f7eca SK |
465 | { |
466 | gfc_error ("Statement label at %C is zero"); | |
467 | goto cleanup; | |
468 | } | |
469 | ||
470 | *label = gfc_get_st_label (i); | |
471 | return MATCH_YES; | |
472 | ||
473 | cleanup: | |
474 | ||
63645982 | 475 | gfc_current_locus = old_loc; |
6de9cd9a DN |
476 | return MATCH_ERROR; |
477 | } | |
478 | ||
479 | ||
480 | /* Match and validate a label associated with a named IF, DO or SELECT | |
481 | statement. If the symbol does not have the label attribute, we add | |
482 | it. We also make sure the symbol does not refer to another | |
483 | (active) block. A matched label is pointed to by gfc_new_block. */ | |
484 | ||
485 | match | |
486 | gfc_match_label (void) | |
487 | { | |
488 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6de9cd9a DN |
489 | match m; |
490 | ||
491 | gfc_new_block = NULL; | |
492 | ||
493 | m = gfc_match (" %n :", name); | |
494 | if (m != MATCH_YES) | |
495 | return m; | |
496 | ||
497 | if (gfc_get_symbol (name, NULL, &gfc_new_block)) | |
498 | { | |
499 | gfc_error ("Label name '%s' at %C is ambiguous", name); | |
500 | return MATCH_ERROR; | |
501 | } | |
502 | ||
cb1d4dce SK |
503 | if (gfc_new_block->attr.flavor == FL_LABEL) |
504 | { | |
505 | gfc_error ("Duplicate construct label '%s' at %C", name); | |
506 | return MATCH_ERROR; | |
507 | } | |
6de9cd9a | 508 | |
cb1d4dce SK |
509 | if (gfc_add_flavor (&gfc_new_block->attr, FL_LABEL, |
510 | gfc_new_block->name, NULL) == FAILURE) | |
511 | return MATCH_ERROR; | |
6de9cd9a DN |
512 | |
513 | return MATCH_YES; | |
514 | } | |
515 | ||
516 | ||
6de9cd9a | 517 | /* See if the current input looks like a name of some sort. Modifies |
090021e9 BM |
518 | the passed buffer which must be GFC_MAX_SYMBOL_LEN+1 bytes long. |
519 | Note that options.c restricts max_identifier_length to not more | |
520 | than GFC_MAX_SYMBOL_LEN. */ | |
6de9cd9a DN |
521 | |
522 | match | |
523 | gfc_match_name (char *buffer) | |
524 | { | |
525 | locus old_loc; | |
8fc541d3 FXC |
526 | int i; |
527 | char c; | |
6de9cd9a | 528 | |
63645982 | 529 | old_loc = gfc_current_locus; |
6de9cd9a DN |
530 | gfc_gobble_whitespace (); |
531 | ||
8fc541d3 | 532 | c = gfc_next_ascii_char (); |
e6472bce | 533 | if (!(ISALPHA (c) || (c == '_' && gfc_option.flag_allow_leading_underscore))) |
6de9cd9a | 534 | { |
9a528648 | 535 | if (gfc_error_flag_test() == 0 && c != '(') |
b251af97 | 536 | gfc_error ("Invalid character in name at %C"); |
63645982 | 537 | gfc_current_locus = old_loc; |
6de9cd9a DN |
538 | return MATCH_NO; |
539 | } | |
540 | ||
541 | i = 0; | |
542 | ||
543 | do | |
544 | { | |
545 | buffer[i++] = c; | |
546 | ||
547 | if (i > gfc_option.max_identifier_length) | |
548 | { | |
549 | gfc_error ("Name at %C is too long"); | |
550 | return MATCH_ERROR; | |
551 | } | |
552 | ||
63645982 | 553 | old_loc = gfc_current_locus; |
8fc541d3 | 554 | c = gfc_next_ascii_char (); |
6de9cd9a | 555 | } |
b251af97 | 556 | while (ISALNUM (c) || c == '_' || (gfc_option.flag_dollar_ok && c == '$')); |
6de9cd9a | 557 | |
89a5afda TB |
558 | if (c == '$' && !gfc_option.flag_dollar_ok) |
559 | { | |
8fc541d3 FXC |
560 | gfc_error ("Invalid character '$' at %C. Use -fdollar-ok to allow it " |
561 | "as an extension"); | |
89a5afda TB |
562 | return MATCH_ERROR; |
563 | } | |
564 | ||
6de9cd9a | 565 | buffer[i] = '\0'; |
63645982 | 566 | gfc_current_locus = old_loc; |
6de9cd9a DN |
567 | |
568 | return MATCH_YES; | |
569 | } | |
570 | ||
571 | ||
a8b3b0b6 CR |
572 | /* Match a valid name for C, which is almost the same as for Fortran, |
573 | except that you can start with an underscore, etc.. It could have | |
574 | been done by modifying the gfc_match_name, but this way other | |
62603fae | 575 | things C allows can be done, such as no limits on the length. |
a8b3b0b6 CR |
576 | Also, by rewriting it, we use the gfc_next_char_C() to prevent the |
577 | input characters from being automatically lower cased, since C is | |
578 | case sensitive. The parameter, buffer, is used to return the name | |
62603fae JB |
579 | that is matched. Return MATCH_ERROR if the name is not a valid C |
580 | name, MATCH_NO if what we're seeing isn't a name, and MATCH_YES if | |
581 | we successfully match a C name. */ | |
a8b3b0b6 CR |
582 | |
583 | match | |
9975a30b | 584 | gfc_match_name_C (const char **buffer) |
a8b3b0b6 CR |
585 | { |
586 | locus old_loc; | |
62603fae | 587 | size_t i = 0; |
8fc541d3 | 588 | gfc_char_t c; |
62603fae JB |
589 | char* buf; |
590 | size_t cursz = 16; | |
a8b3b0b6 CR |
591 | |
592 | old_loc = gfc_current_locus; | |
593 | gfc_gobble_whitespace (); | |
594 | ||
595 | /* Get the next char (first possible char of name) and see if | |
596 | it's valid for C (either a letter or an underscore). */ | |
696abb30 | 597 | c = gfc_next_char_literal (INSTRING_WARN); |
a8b3b0b6 CR |
598 | |
599 | /* If the user put nothing expect spaces between the quotes, it is valid | |
600 | and simply means there is no name= specifier and the name is the fortran | |
601 | symbol name, all lowercase. */ | |
602 | if (c == '"' || c == '\'') | |
603 | { | |
a8b3b0b6 CR |
604 | gfc_current_locus = old_loc; |
605 | return MATCH_YES; | |
606 | } | |
607 | ||
608 | if (!ISALPHA (c) && c != '_') | |
609 | { | |
610 | gfc_error ("Invalid C name in NAME= specifier at %C"); | |
611 | return MATCH_ERROR; | |
612 | } | |
613 | ||
62603fae | 614 | buf = XNEWVEC (char, cursz); |
a8b3b0b6 CR |
615 | /* Continue to read valid variable name characters. */ |
616 | do | |
617 | { | |
8fc541d3 FXC |
618 | gcc_assert (gfc_wide_fits_in_byte (c)); |
619 | ||
62603fae JB |
620 | buf[i++] = (unsigned char) c; |
621 | ||
622 | if (i >= cursz) | |
623 | { | |
624 | cursz *= 2; | |
625 | buf = XRESIZEVEC (char, buf, cursz); | |
626 | } | |
a8b3b0b6 CR |
627 | |
628 | old_loc = gfc_current_locus; | |
629 | ||
630 | /* Get next char; param means we're in a string. */ | |
696abb30 | 631 | c = gfc_next_char_literal (INSTRING_WARN); |
a8b3b0b6 CR |
632 | } while (ISALNUM (c) || c == '_'); |
633 | ||
62603fae JB |
634 | /* The binding label will be needed later anyway, so just insert it |
635 | into the symbol table. */ | |
636 | buf[i] = '\0'; | |
637 | *buffer = IDENTIFIER_POINTER (get_identifier (buf)); | |
638 | XDELETEVEC (buf); | |
a8b3b0b6 CR |
639 | gfc_current_locus = old_loc; |
640 | ||
641 | /* See if we stopped because of whitespace. */ | |
642 | if (c == ' ') | |
643 | { | |
644 | gfc_gobble_whitespace (); | |
8fc541d3 | 645 | c = gfc_peek_ascii_char (); |
a8b3b0b6 CR |
646 | if (c != '"' && c != '\'') |
647 | { | |
648 | gfc_error ("Embedded space in NAME= specifier at %C"); | |
649 | return MATCH_ERROR; | |
650 | } | |
651 | } | |
652 | ||
653 | /* If we stopped because we had an invalid character for a C name, report | |
654 | that to the user by returning MATCH_NO. */ | |
655 | if (c != '"' && c != '\'') | |
656 | { | |
657 | gfc_error ("Invalid C name in NAME= specifier at %C"); | |
658 | return MATCH_ERROR; | |
659 | } | |
660 | ||
661 | return MATCH_YES; | |
662 | } | |
663 | ||
664 | ||
6de9cd9a DN |
665 | /* Match a symbol on the input. Modifies the pointer to the symbol |
666 | pointer if successful. */ | |
667 | ||
668 | match | |
b251af97 | 669 | gfc_match_sym_tree (gfc_symtree **matched_symbol, int host_assoc) |
6de9cd9a DN |
670 | { |
671 | char buffer[GFC_MAX_SYMBOL_LEN + 1]; | |
672 | match m; | |
673 | ||
674 | m = gfc_match_name (buffer); | |
675 | if (m != MATCH_YES) | |
676 | return m; | |
677 | ||
678 | if (host_assoc) | |
679 | return (gfc_get_ha_sym_tree (buffer, matched_symbol)) | |
66e4ab31 | 680 | ? MATCH_ERROR : MATCH_YES; |
6de9cd9a | 681 | |
08a6b8e0 | 682 | if (gfc_get_sym_tree (buffer, NULL, matched_symbol, false)) |
6de9cd9a DN |
683 | return MATCH_ERROR; |
684 | ||
685 | return MATCH_YES; | |
686 | } | |
687 | ||
688 | ||
689 | match | |
b251af97 | 690 | gfc_match_symbol (gfc_symbol **matched_symbol, int host_assoc) |
6de9cd9a DN |
691 | { |
692 | gfc_symtree *st; | |
693 | match m; | |
694 | ||
695 | m = gfc_match_sym_tree (&st, host_assoc); | |
696 | ||
697 | if (m == MATCH_YES) | |
698 | { | |
699 | if (st) | |
b251af97 | 700 | *matched_symbol = st->n.sym; |
6de9cd9a | 701 | else |
b251af97 | 702 | *matched_symbol = NULL; |
6de9cd9a | 703 | } |
32cafd73 MH |
704 | else |
705 | *matched_symbol = NULL; | |
6de9cd9a DN |
706 | return m; |
707 | } | |
708 | ||
b251af97 | 709 | |
6de9cd9a DN |
710 | /* Match an intrinsic operator. Returns an INTRINSIC enum. While matching, |
711 | we always find INTRINSIC_PLUS before INTRINSIC_UPLUS. We work around this | |
712 | in matchexp.c. */ | |
713 | ||
714 | match | |
b251af97 | 715 | gfc_match_intrinsic_op (gfc_intrinsic_op *result) |
6de9cd9a | 716 | { |
f4d8e0d1 | 717 | locus orig_loc = gfc_current_locus; |
8fc541d3 | 718 | char ch; |
6de9cd9a | 719 | |
f4d8e0d1 | 720 | gfc_gobble_whitespace (); |
8fc541d3 | 721 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
722 | switch (ch) |
723 | { | |
724 | case '+': | |
725 | /* Matched "+". */ | |
726 | *result = INTRINSIC_PLUS; | |
727 | return MATCH_YES; | |
6de9cd9a | 728 | |
f4d8e0d1 RS |
729 | case '-': |
730 | /* Matched "-". */ | |
731 | *result = INTRINSIC_MINUS; | |
732 | return MATCH_YES; | |
6de9cd9a | 733 | |
f4d8e0d1 | 734 | case '=': |
8fc541d3 | 735 | if (gfc_next_ascii_char () == '=') |
f4d8e0d1 RS |
736 | { |
737 | /* Matched "==". */ | |
738 | *result = INTRINSIC_EQ; | |
739 | return MATCH_YES; | |
740 | } | |
741 | break; | |
742 | ||
743 | case '<': | |
8fc541d3 | 744 | if (gfc_peek_ascii_char () == '=') |
f4d8e0d1 RS |
745 | { |
746 | /* Matched "<=". */ | |
8fc541d3 | 747 | gfc_next_ascii_char (); |
f4d8e0d1 RS |
748 | *result = INTRINSIC_LE; |
749 | return MATCH_YES; | |
750 | } | |
751 | /* Matched "<". */ | |
752 | *result = INTRINSIC_LT; | |
753 | return MATCH_YES; | |
754 | ||
755 | case '>': | |
8fc541d3 | 756 | if (gfc_peek_ascii_char () == '=') |
f4d8e0d1 RS |
757 | { |
758 | /* Matched ">=". */ | |
8fc541d3 | 759 | gfc_next_ascii_char (); |
f4d8e0d1 RS |
760 | *result = INTRINSIC_GE; |
761 | return MATCH_YES; | |
762 | } | |
763 | /* Matched ">". */ | |
764 | *result = INTRINSIC_GT; | |
765 | return MATCH_YES; | |
766 | ||
767 | case '*': | |
8fc541d3 | 768 | if (gfc_peek_ascii_char () == '*') |
f4d8e0d1 RS |
769 | { |
770 | /* Matched "**". */ | |
8fc541d3 | 771 | gfc_next_ascii_char (); |
f4d8e0d1 RS |
772 | *result = INTRINSIC_POWER; |
773 | return MATCH_YES; | |
774 | } | |
775 | /* Matched "*". */ | |
776 | *result = INTRINSIC_TIMES; | |
777 | return MATCH_YES; | |
778 | ||
779 | case '/': | |
8fc541d3 | 780 | ch = gfc_peek_ascii_char (); |
f4d8e0d1 RS |
781 | if (ch == '=') |
782 | { | |
783 | /* Matched "/=". */ | |
8fc541d3 | 784 | gfc_next_ascii_char (); |
f4d8e0d1 RS |
785 | *result = INTRINSIC_NE; |
786 | return MATCH_YES; | |
787 | } | |
788 | else if (ch == '/') | |
789 | { | |
790 | /* Matched "//". */ | |
8fc541d3 | 791 | gfc_next_ascii_char (); |
f4d8e0d1 RS |
792 | *result = INTRINSIC_CONCAT; |
793 | return MATCH_YES; | |
794 | } | |
795 | /* Matched "/". */ | |
796 | *result = INTRINSIC_DIVIDE; | |
797 | return MATCH_YES; | |
798 | ||
799 | case '.': | |
8fc541d3 | 800 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
801 | switch (ch) |
802 | { | |
803 | case 'a': | |
8fc541d3 FXC |
804 | if (gfc_next_ascii_char () == 'n' |
805 | && gfc_next_ascii_char () == 'd' | |
806 | && gfc_next_ascii_char () == '.') | |
f4d8e0d1 RS |
807 | { |
808 | /* Matched ".and.". */ | |
809 | *result = INTRINSIC_AND; | |
810 | return MATCH_YES; | |
811 | } | |
812 | break; | |
813 | ||
814 | case 'e': | |
8fc541d3 | 815 | if (gfc_next_ascii_char () == 'q') |
f4d8e0d1 | 816 | { |
8fc541d3 | 817 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
818 | if (ch == '.') |
819 | { | |
820 | /* Matched ".eq.". */ | |
821 | *result = INTRINSIC_EQ_OS; | |
822 | return MATCH_YES; | |
823 | } | |
824 | else if (ch == 'v') | |
825 | { | |
8fc541d3 | 826 | if (gfc_next_ascii_char () == '.') |
f4d8e0d1 RS |
827 | { |
828 | /* Matched ".eqv.". */ | |
829 | *result = INTRINSIC_EQV; | |
830 | return MATCH_YES; | |
831 | } | |
832 | } | |
833 | } | |
834 | break; | |
835 | ||
836 | case 'g': | |
8fc541d3 | 837 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
838 | if (ch == 'e') |
839 | { | |
8fc541d3 | 840 | if (gfc_next_ascii_char () == '.') |
f4d8e0d1 RS |
841 | { |
842 | /* Matched ".ge.". */ | |
843 | *result = INTRINSIC_GE_OS; | |
844 | return MATCH_YES; | |
845 | } | |
846 | } | |
847 | else if (ch == 't') | |
848 | { | |
8fc541d3 | 849 | if (gfc_next_ascii_char () == '.') |
f4d8e0d1 RS |
850 | { |
851 | /* Matched ".gt.". */ | |
852 | *result = INTRINSIC_GT_OS; | |
853 | return MATCH_YES; | |
854 | } | |
855 | } | |
856 | break; | |
857 | ||
858 | case 'l': | |
8fc541d3 | 859 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
860 | if (ch == 'e') |
861 | { | |
8fc541d3 | 862 | if (gfc_next_ascii_char () == '.') |
f4d8e0d1 RS |
863 | { |
864 | /* Matched ".le.". */ | |
865 | *result = INTRINSIC_LE_OS; | |
866 | return MATCH_YES; | |
867 | } | |
868 | } | |
869 | else if (ch == 't') | |
870 | { | |
8fc541d3 | 871 | if (gfc_next_ascii_char () == '.') |
f4d8e0d1 RS |
872 | { |
873 | /* Matched ".lt.". */ | |
874 | *result = INTRINSIC_LT_OS; | |
875 | return MATCH_YES; | |
876 | } | |
877 | } | |
878 | break; | |
879 | ||
880 | case 'n': | |
8fc541d3 | 881 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
882 | if (ch == 'e') |
883 | { | |
8fc541d3 | 884 | ch = gfc_next_ascii_char (); |
f4d8e0d1 RS |
885 | if (ch == '.') |
886 | { | |
887 | /* Matched ".ne.". */ | |
888 | *result = INTRINSIC_NE_OS; | |
889 | return MATCH_YES; | |
890 | } | |
891 | else if (ch == 'q') | |
892 | { | |
8fc541d3 FXC |
893 | if (gfc_next_ascii_char () == 'v' |
894 | && gfc_next_ascii_char () == '.') | |
f4d8e0d1 RS |
895 | { |
896 | /* Matched ".neqv.". */ | |
897 | *result = INTRINSIC_NEQV; | |
898 | return MATCH_YES; | |
899 | } | |
900 | } | |
901 | } | |
902 | else if (ch == 'o') | |
903 | { | |
8fc541d3 FXC |
904 | if (gfc_next_ascii_char () == 't' |
905 | && gfc_next_ascii_char () == '.') | |
f4d8e0d1 RS |
906 | { |
907 | /* Matched ".not.". */ | |
908 | *result = INTRINSIC_NOT; | |
909 | return MATCH_YES; | |
910 | } | |
911 | } | |
912 | break; | |
913 | ||
914 | case 'o': | |
8fc541d3 FXC |
915 | if (gfc_next_ascii_char () == 'r' |
916 | && gfc_next_ascii_char () == '.') | |
f4d8e0d1 RS |
917 | { |
918 | /* Matched ".or.". */ | |
919 | *result = INTRINSIC_OR; | |
920 | return MATCH_YES; | |
921 | } | |
922 | break; | |
923 | ||
924 | default: | |
925 | break; | |
926 | } | |
927 | break; | |
928 | ||
929 | default: | |
930 | break; | |
931 | } | |
932 | ||
933 | gfc_current_locus = orig_loc; | |
934 | return MATCH_NO; | |
6de9cd9a DN |
935 | } |
936 | ||
937 | ||
938 | /* Match a loop control phrase: | |
939 | ||
940 | <LVALUE> = <EXPR>, <EXPR> [, <EXPR> ] | |
941 | ||
942 | If the final integer expression is not present, a constant unity | |
943 | expression is returned. We don't return MATCH_ERROR until after | |
944 | the equals sign is seen. */ | |
945 | ||
946 | match | |
b251af97 | 947 | gfc_match_iterator (gfc_iterator *iter, int init_flag) |
6de9cd9a DN |
948 | { |
949 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
950 | gfc_expr *var, *e1, *e2, *e3; | |
951 | locus start; | |
952 | match m; | |
953 | ||
d3a9eea2 TB |
954 | e1 = e2 = e3 = NULL; |
955 | ||
b251af97 | 956 | /* Match the start of an iterator without affecting the symbol table. */ |
6de9cd9a | 957 | |
63645982 | 958 | start = gfc_current_locus; |
6de9cd9a | 959 | m = gfc_match (" %n =", name); |
63645982 | 960 | gfc_current_locus = start; |
6de9cd9a DN |
961 | |
962 | if (m != MATCH_YES) | |
963 | return MATCH_NO; | |
964 | ||
965 | m = gfc_match_variable (&var, 0); | |
966 | if (m != MATCH_YES) | |
967 | return MATCH_NO; | |
968 | ||
d3a9eea2 TB |
969 | /* F2008, C617 & C565. */ |
970 | if (var->symtree->n.sym->attr.codimension) | |
971 | { | |
972 | gfc_error ("Loop variable at %C cannot be a coarray"); | |
973 | goto cleanup; | |
974 | } | |
6de9cd9a DN |
975 | |
976 | if (var->ref != NULL) | |
977 | { | |
978 | gfc_error ("Loop variable at %C cannot be a sub-component"); | |
979 | goto cleanup; | |
980 | } | |
981 | ||
d3a9eea2 TB |
982 | gfc_match_char ('='); |
983 | ||
9a3db5a3 PT |
984 | var->symtree->n.sym->attr.implied_index = 1; |
985 | ||
6de9cd9a DN |
986 | m = init_flag ? gfc_match_init_expr (&e1) : gfc_match_expr (&e1); |
987 | if (m == MATCH_NO) | |
988 | goto syntax; | |
989 | if (m == MATCH_ERROR) | |
990 | goto cleanup; | |
991 | ||
992 | if (gfc_match_char (',') != MATCH_YES) | |
993 | goto syntax; | |
994 | ||
995 | m = init_flag ? gfc_match_init_expr (&e2) : gfc_match_expr (&e2); | |
996 | if (m == MATCH_NO) | |
997 | goto syntax; | |
998 | if (m == MATCH_ERROR) | |
999 | goto cleanup; | |
1000 | ||
1001 | if (gfc_match_char (',') != MATCH_YES) | |
1002 | { | |
b7e75771 | 1003 | e3 = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1); |
6de9cd9a DN |
1004 | goto done; |
1005 | } | |
1006 | ||
1007 | m = init_flag ? gfc_match_init_expr (&e3) : gfc_match_expr (&e3); | |
1008 | if (m == MATCH_ERROR) | |
1009 | goto cleanup; | |
1010 | if (m == MATCH_NO) | |
1011 | { | |
1012 | gfc_error ("Expected a step value in iterator at %C"); | |
1013 | goto cleanup; | |
1014 | } | |
1015 | ||
1016 | done: | |
1017 | iter->var = var; | |
1018 | iter->start = e1; | |
1019 | iter->end = e2; | |
1020 | iter->step = e3; | |
1021 | return MATCH_YES; | |
1022 | ||
1023 | syntax: | |
1024 | gfc_error ("Syntax error in iterator at %C"); | |
1025 | ||
1026 | cleanup: | |
1027 | gfc_free_expr (e1); | |
1028 | gfc_free_expr (e2); | |
1029 | gfc_free_expr (e3); | |
1030 | ||
1031 | return MATCH_ERROR; | |
1032 | } | |
1033 | ||
1034 | ||
1035 | /* Tries to match the next non-whitespace character on the input. | |
1036 | This subroutine does not return MATCH_ERROR. */ | |
1037 | ||
1038 | match | |
1039 | gfc_match_char (char c) | |
1040 | { | |
1041 | locus where; | |
1042 | ||
63645982 | 1043 | where = gfc_current_locus; |
6de9cd9a DN |
1044 | gfc_gobble_whitespace (); |
1045 | ||
8fc541d3 | 1046 | if (gfc_next_ascii_char () == c) |
6de9cd9a DN |
1047 | return MATCH_YES; |
1048 | ||
63645982 | 1049 | gfc_current_locus = where; |
6de9cd9a DN |
1050 | return MATCH_NO; |
1051 | } | |
1052 | ||
1053 | ||
1054 | /* General purpose matching subroutine. The target string is a | |
1055 | scanf-like format string in which spaces correspond to arbitrary | |
1056 | whitespace (including no whitespace), characters correspond to | |
1057 | themselves. The %-codes are: | |
1058 | ||
1059 | %% Literal percent sign | |
1060 | %e Expression, pointer to a pointer is set | |
1061 | %s Symbol, pointer to the symbol is set | |
1062 | %n Name, character buffer is set to name | |
1063 | %t Matches end of statement. | |
1064 | %o Matches an intrinsic operator, returned as an INTRINSIC enum. | |
1065 | %l Matches a statement label | |
1066 | %v Matches a variable expression (an lvalue) | |
1067 | % Matches a required space (in free form) and optional spaces. */ | |
1068 | ||
1069 | match | |
1070 | gfc_match (const char *target, ...) | |
1071 | { | |
1072 | gfc_st_label **label; | |
1073 | int matches, *ip; | |
1074 | locus old_loc; | |
1075 | va_list argp; | |
1076 | char c, *np; | |
1077 | match m, n; | |
1078 | void **vp; | |
1079 | const char *p; | |
1080 | ||
63645982 | 1081 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1082 | va_start (argp, target); |
1083 | m = MATCH_NO; | |
1084 | matches = 0; | |
1085 | p = target; | |
1086 | ||
1087 | loop: | |
1088 | c = *p++; | |
1089 | switch (c) | |
1090 | { | |
1091 | case ' ': | |
1092 | gfc_gobble_whitespace (); | |
1093 | goto loop; | |
1094 | case '\0': | |
1095 | m = MATCH_YES; | |
1096 | break; | |
1097 | ||
1098 | case '%': | |
1099 | c = *p++; | |
1100 | switch (c) | |
1101 | { | |
1102 | case 'e': | |
1103 | vp = va_arg (argp, void **); | |
1104 | n = gfc_match_expr ((gfc_expr **) vp); | |
1105 | if (n != MATCH_YES) | |
1106 | { | |
1107 | m = n; | |
1108 | goto not_yes; | |
1109 | } | |
1110 | ||
1111 | matches++; | |
1112 | goto loop; | |
1113 | ||
1114 | case 'v': | |
1115 | vp = va_arg (argp, void **); | |
1116 | n = gfc_match_variable ((gfc_expr **) vp, 0); | |
1117 | if (n != MATCH_YES) | |
1118 | { | |
1119 | m = n; | |
1120 | goto not_yes; | |
1121 | } | |
1122 | ||
1123 | matches++; | |
1124 | goto loop; | |
1125 | ||
1126 | case 's': | |
1127 | vp = va_arg (argp, void **); | |
1128 | n = gfc_match_symbol ((gfc_symbol **) vp, 0); | |
1129 | if (n != MATCH_YES) | |
1130 | { | |
1131 | m = n; | |
1132 | goto not_yes; | |
1133 | } | |
1134 | ||
1135 | matches++; | |
1136 | goto loop; | |
1137 | ||
1138 | case 'n': | |
1139 | np = va_arg (argp, char *); | |
1140 | n = gfc_match_name (np); | |
1141 | if (n != MATCH_YES) | |
1142 | { | |
1143 | m = n; | |
1144 | goto not_yes; | |
1145 | } | |
1146 | ||
1147 | matches++; | |
1148 | goto loop; | |
1149 | ||
1150 | case 'l': | |
1151 | label = va_arg (argp, gfc_st_label **); | |
a34a91f0 | 1152 | n = gfc_match_st_label (label); |
6de9cd9a DN |
1153 | if (n != MATCH_YES) |
1154 | { | |
1155 | m = n; | |
1156 | goto not_yes; | |
1157 | } | |
1158 | ||
1159 | matches++; | |
1160 | goto loop; | |
1161 | ||
1162 | case 'o': | |
1163 | ip = va_arg (argp, int *); | |
1164 | n = gfc_match_intrinsic_op ((gfc_intrinsic_op *) ip); | |
1165 | if (n != MATCH_YES) | |
1166 | { | |
1167 | m = n; | |
1168 | goto not_yes; | |
1169 | } | |
1170 | ||
1171 | matches++; | |
1172 | goto loop; | |
1173 | ||
1174 | case 't': | |
1175 | if (gfc_match_eos () != MATCH_YES) | |
1176 | { | |
1177 | m = MATCH_NO; | |
1178 | goto not_yes; | |
1179 | } | |
1180 | goto loop; | |
1181 | ||
1182 | case ' ': | |
1183 | if (gfc_match_space () == MATCH_YES) | |
1184 | goto loop; | |
1185 | m = MATCH_NO; | |
1186 | goto not_yes; | |
1187 | ||
1188 | case '%': | |
66e4ab31 | 1189 | break; /* Fall through to character matcher. */ |
6de9cd9a DN |
1190 | |
1191 | default: | |
1192 | gfc_internal_error ("gfc_match(): Bad match code %c", c); | |
1193 | } | |
1194 | ||
1195 | default: | |
befdf741 DK |
1196 | |
1197 | /* gfc_next_ascii_char converts characters to lower-case, so we shouldn't | |
1198 | expect an upper case character here! */ | |
1199 | gcc_assert (TOLOWER (c) == c); | |
1200 | ||
8fc541d3 | 1201 | if (c == gfc_next_ascii_char ()) |
6de9cd9a DN |
1202 | goto loop; |
1203 | break; | |
1204 | } | |
1205 | ||
1206 | not_yes: | |
1207 | va_end (argp); | |
1208 | ||
1209 | if (m != MATCH_YES) | |
1210 | { | |
1211 | /* Clean up after a failed match. */ | |
63645982 | 1212 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1213 | va_start (argp, target); |
1214 | ||
1215 | p = target; | |
1216 | for (; matches > 0; matches--) | |
1217 | { | |
1218 | while (*p++ != '%'); | |
1219 | ||
1220 | switch (*p++) | |
1221 | { | |
1222 | case '%': | |
1223 | matches++; | |
66e4ab31 | 1224 | break; /* Skip. */ |
6de9cd9a | 1225 | |
6de9cd9a DN |
1226 | /* Matches that don't have to be undone */ |
1227 | case 'o': | |
1228 | case 'l': | |
1229 | case 'n': | |
1230 | case 's': | |
b251af97 | 1231 | (void) va_arg (argp, void **); |
6de9cd9a DN |
1232 | break; |
1233 | ||
1234 | case 'e': | |
6de9cd9a | 1235 | case 'v': |
6de9cd9a | 1236 | vp = va_arg (argp, void **); |
ece3f663 | 1237 | gfc_free_expr ((struct gfc_expr *)*vp); |
6de9cd9a DN |
1238 | *vp = NULL; |
1239 | break; | |
1240 | } | |
1241 | } | |
1242 | ||
1243 | va_end (argp); | |
1244 | } | |
1245 | ||
1246 | return m; | |
1247 | } | |
1248 | ||
1249 | ||
1250 | /*********************** Statement level matching **********************/ | |
1251 | ||
1252 | /* Matches the start of a program unit, which is the program keyword | |
e08b5a75 | 1253 | followed by an obligatory symbol. */ |
6de9cd9a DN |
1254 | |
1255 | match | |
1256 | gfc_match_program (void) | |
1257 | { | |
1258 | gfc_symbol *sym; | |
1259 | match m; | |
1260 | ||
6de9cd9a DN |
1261 | m = gfc_match ("% %s%t", &sym); |
1262 | ||
1263 | if (m == MATCH_NO) | |
1264 | { | |
1265 | gfc_error ("Invalid form of PROGRAM statement at %C"); | |
1266 | m = MATCH_ERROR; | |
1267 | } | |
1268 | ||
1269 | if (m == MATCH_ERROR) | |
1270 | return m; | |
1271 | ||
231b2fcc | 1272 | if (gfc_add_flavor (&sym->attr, FL_PROGRAM, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
1273 | return MATCH_ERROR; |
1274 | ||
1275 | gfc_new_block = sym; | |
1276 | ||
1277 | return MATCH_YES; | |
1278 | } | |
1279 | ||
1280 | ||
1281 | /* Match a simple assignment statement. */ | |
1282 | ||
1283 | match | |
1284 | gfc_match_assignment (void) | |
1285 | { | |
1286 | gfc_expr *lvalue, *rvalue; | |
1287 | locus old_loc; | |
1288 | match m; | |
1289 | ||
63645982 | 1290 | old_loc = gfc_current_locus; |
6de9cd9a | 1291 | |
5056a350 | 1292 | lvalue = NULL; |
6de9cd9a DN |
1293 | m = gfc_match (" %v =", &lvalue); |
1294 | if (m != MATCH_YES) | |
c9583ed2 | 1295 | { |
5056a350 SK |
1296 | gfc_current_locus = old_loc; |
1297 | gfc_free_expr (lvalue); | |
1298 | return MATCH_NO; | |
c9583ed2 TS |
1299 | } |
1300 | ||
5056a350 | 1301 | rvalue = NULL; |
6de9cd9a DN |
1302 | m = gfc_match (" %e%t", &rvalue); |
1303 | if (m != MATCH_YES) | |
5056a350 SK |
1304 | { |
1305 | gfc_current_locus = old_loc; | |
1306 | gfc_free_expr (lvalue); | |
1307 | gfc_free_expr (rvalue); | |
1308 | return m; | |
1309 | } | |
6de9cd9a DN |
1310 | |
1311 | gfc_set_sym_referenced (lvalue->symtree->n.sym); | |
1312 | ||
1313 | new_st.op = EXEC_ASSIGN; | |
a513927a | 1314 | new_st.expr1 = lvalue; |
6de9cd9a DN |
1315 | new_st.expr2 = rvalue; |
1316 | ||
c9583ed2 TS |
1317 | gfc_check_do_variable (lvalue->symtree); |
1318 | ||
6de9cd9a | 1319 | return MATCH_YES; |
6de9cd9a DN |
1320 | } |
1321 | ||
1322 | ||
1323 | /* Match a pointer assignment statement. */ | |
1324 | ||
1325 | match | |
1326 | gfc_match_pointer_assignment (void) | |
1327 | { | |
1328 | gfc_expr *lvalue, *rvalue; | |
1329 | locus old_loc; | |
1330 | match m; | |
1331 | ||
63645982 | 1332 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1333 | |
1334 | lvalue = rvalue = NULL; | |
837c4b78 | 1335 | gfc_matching_ptr_assignment = 0; |
8fb74da4 | 1336 | gfc_matching_procptr_assignment = 0; |
6de9cd9a DN |
1337 | |
1338 | m = gfc_match (" %v =>", &lvalue); | |
1339 | if (m != MATCH_YES) | |
1340 | { | |
1341 | m = MATCH_NO; | |
1342 | goto cleanup; | |
1343 | } | |
1344 | ||
713485cc | 1345 | if (lvalue->symtree->n.sym->attr.proc_pointer |
f64edc8b | 1346 | || gfc_is_proc_ptr_comp (lvalue, NULL)) |
8fb74da4 | 1347 | gfc_matching_procptr_assignment = 1; |
837c4b78 JW |
1348 | else |
1349 | gfc_matching_ptr_assignment = 1; | |
8fb74da4 | 1350 | |
6de9cd9a | 1351 | m = gfc_match (" %e%t", &rvalue); |
837c4b78 | 1352 | gfc_matching_ptr_assignment = 0; |
8fb74da4 | 1353 | gfc_matching_procptr_assignment = 0; |
6de9cd9a DN |
1354 | if (m != MATCH_YES) |
1355 | goto cleanup; | |
1356 | ||
1357 | new_st.op = EXEC_POINTER_ASSIGN; | |
a513927a | 1358 | new_st.expr1 = lvalue; |
6de9cd9a DN |
1359 | new_st.expr2 = rvalue; |
1360 | ||
1361 | return MATCH_YES; | |
1362 | ||
1363 | cleanup: | |
63645982 | 1364 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1365 | gfc_free_expr (lvalue); |
1366 | gfc_free_expr (rvalue); | |
1367 | return m; | |
1368 | } | |
1369 | ||
1370 | ||
43e1c5f7 | 1371 | /* We try to match an easy arithmetic IF statement. This only happens |
835d64ab FXC |
1372 | when just after having encountered a simple IF statement. This code |
1373 | is really duplicate with parts of the gfc_match_if code, but this is | |
1374 | *much* easier. */ | |
b251af97 | 1375 | |
f55e72ce | 1376 | static match |
835d64ab | 1377 | match_arithmetic_if (void) |
43e1c5f7 FXC |
1378 | { |
1379 | gfc_st_label *l1, *l2, *l3; | |
1380 | gfc_expr *expr; | |
1381 | match m; | |
1382 | ||
1383 | m = gfc_match (" ( %e ) %l , %l , %l%t", &expr, &l1, &l2, &l3); | |
1384 | if (m != MATCH_YES) | |
1385 | return m; | |
1386 | ||
1387 | if (gfc_reference_st_label (l1, ST_LABEL_TARGET) == FAILURE | |
1388 | || gfc_reference_st_label (l2, ST_LABEL_TARGET) == FAILURE | |
1389 | || gfc_reference_st_label (l3, ST_LABEL_TARGET) == FAILURE) | |
1390 | { | |
1391 | gfc_free_expr (expr); | |
1392 | return MATCH_ERROR; | |
1393 | } | |
1394 | ||
e2ab8b09 JW |
1395 | if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: Arithmetic IF " |
1396 | "statement at %C") == FAILURE) | |
51c3f0f6 FXC |
1397 | return MATCH_ERROR; |
1398 | ||
43e1c5f7 | 1399 | new_st.op = EXEC_ARITHMETIC_IF; |
a513927a | 1400 | new_st.expr1 = expr; |
79bd1948 | 1401 | new_st.label1 = l1; |
43e1c5f7 FXC |
1402 | new_st.label2 = l2; |
1403 | new_st.label3 = l3; | |
1404 | ||
1405 | return MATCH_YES; | |
1406 | } | |
1407 | ||
1408 | ||
6de9cd9a DN |
1409 | /* The IF statement is a bit of a pain. First of all, there are three |
1410 | forms of it, the simple IF, the IF that starts a block and the | |
1411 | arithmetic IF. | |
1412 | ||
1413 | There is a problem with the simple IF and that is the fact that we | |
1414 | only have a single level of undo information on symbols. What this | |
1415 | means is for a simple IF, we must re-match the whole IF statement | |
1416 | multiple times in order to guarantee that the symbol table ends up | |
1417 | in the proper state. */ | |
1418 | ||
c874ae73 TS |
1419 | static match match_simple_forall (void); |
1420 | static match match_simple_where (void); | |
1421 | ||
6de9cd9a | 1422 | match |
b251af97 | 1423 | gfc_match_if (gfc_statement *if_type) |
6de9cd9a DN |
1424 | { |
1425 | gfc_expr *expr; | |
1426 | gfc_st_label *l1, *l2, *l3; | |
f9b9fb82 | 1427 | locus old_loc, old_loc2; |
6de9cd9a DN |
1428 | gfc_code *p; |
1429 | match m, n; | |
1430 | ||
1431 | n = gfc_match_label (); | |
1432 | if (n == MATCH_ERROR) | |
1433 | return n; | |
1434 | ||
63645982 | 1435 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1436 | |
1437 | m = gfc_match (" if ( %e", &expr); | |
1438 | if (m != MATCH_YES) | |
1439 | return m; | |
1440 | ||
f9b9fb82 JD |
1441 | old_loc2 = gfc_current_locus; |
1442 | gfc_current_locus = old_loc; | |
1443 | ||
1444 | if (gfc_match_parens () == MATCH_ERROR) | |
1445 | return MATCH_ERROR; | |
1446 | ||
1447 | gfc_current_locus = old_loc2; | |
1448 | ||
6de9cd9a DN |
1449 | if (gfc_match_char (')') != MATCH_YES) |
1450 | { | |
1451 | gfc_error ("Syntax error in IF-expression at %C"); | |
1452 | gfc_free_expr (expr); | |
1453 | return MATCH_ERROR; | |
1454 | } | |
1455 | ||
1456 | m = gfc_match (" %l , %l , %l%t", &l1, &l2, &l3); | |
1457 | ||
1458 | if (m == MATCH_YES) | |
1459 | { | |
1460 | if (n == MATCH_YES) | |
1461 | { | |
b251af97 SK |
1462 | gfc_error ("Block label not appropriate for arithmetic IF " |
1463 | "statement at %C"); | |
6de9cd9a DN |
1464 | gfc_free_expr (expr); |
1465 | return MATCH_ERROR; | |
1466 | } | |
1467 | ||
1468 | if (gfc_reference_st_label (l1, ST_LABEL_TARGET) == FAILURE | |
1469 | || gfc_reference_st_label (l2, ST_LABEL_TARGET) == FAILURE | |
1470 | || gfc_reference_st_label (l3, ST_LABEL_TARGET) == FAILURE) | |
1471 | { | |
6de9cd9a DN |
1472 | gfc_free_expr (expr); |
1473 | return MATCH_ERROR; | |
1474 | } | |
51c3f0f6 | 1475 | |
e2ab8b09 | 1476 | if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: Arithmetic IF " |
b251af97 SK |
1477 | "statement at %C") == FAILURE) |
1478 | return MATCH_ERROR; | |
6de9cd9a DN |
1479 | |
1480 | new_st.op = EXEC_ARITHMETIC_IF; | |
a513927a | 1481 | new_st.expr1 = expr; |
79bd1948 | 1482 | new_st.label1 = l1; |
6de9cd9a DN |
1483 | new_st.label2 = l2; |
1484 | new_st.label3 = l3; | |
1485 | ||
1486 | *if_type = ST_ARITHMETIC_IF; | |
1487 | return MATCH_YES; | |
1488 | } | |
1489 | ||
172b8799 | 1490 | if (gfc_match (" then%t") == MATCH_YES) |
6de9cd9a DN |
1491 | { |
1492 | new_st.op = EXEC_IF; | |
a513927a | 1493 | new_st.expr1 = expr; |
6de9cd9a DN |
1494 | *if_type = ST_IF_BLOCK; |
1495 | return MATCH_YES; | |
1496 | } | |
1497 | ||
1498 | if (n == MATCH_YES) | |
1499 | { | |
f9b9fb82 | 1500 | gfc_error ("Block label is not appropriate for IF statement at %C"); |
6de9cd9a DN |
1501 | gfc_free_expr (expr); |
1502 | return MATCH_ERROR; | |
1503 | } | |
1504 | ||
1505 | /* At this point the only thing left is a simple IF statement. At | |
1506 | this point, n has to be MATCH_NO, so we don't have to worry about | |
1507 | re-matching a block label. From what we've got so far, try | |
1508 | matching an assignment. */ | |
1509 | ||
1510 | *if_type = ST_SIMPLE_IF; | |
1511 | ||
1512 | m = gfc_match_assignment (); | |
1513 | if (m == MATCH_YES) | |
1514 | goto got_match; | |
1515 | ||
1516 | gfc_free_expr (expr); | |
1517 | gfc_undo_symbols (); | |
63645982 | 1518 | gfc_current_locus = old_loc; |
6de9cd9a | 1519 | |
5056a350 SK |
1520 | /* m can be MATCH_NO or MATCH_ERROR, here. For MATCH_ERROR, a mangled |
1521 | assignment was found. For MATCH_NO, continue to call the various | |
1522 | matchers. */ | |
17bbca74 SK |
1523 | if (m == MATCH_ERROR) |
1524 | return MATCH_ERROR; | |
1525 | ||
66e4ab31 | 1526 | gfc_match (" if ( %e ) ", &expr); /* Guaranteed to match. */ |
6de9cd9a DN |
1527 | |
1528 | m = gfc_match_pointer_assignment (); | |
1529 | if (m == MATCH_YES) | |
1530 | goto got_match; | |
1531 | ||
1532 | gfc_free_expr (expr); | |
1533 | gfc_undo_symbols (); | |
63645982 | 1534 | gfc_current_locus = old_loc; |
6de9cd9a | 1535 | |
66e4ab31 | 1536 | gfc_match (" if ( %e ) ", &expr); /* Guaranteed to match. */ |
6de9cd9a DN |
1537 | |
1538 | /* Look at the next keyword to see which matcher to call. Matching | |
1539 | the keyword doesn't affect the symbol table, so we don't have to | |
1540 | restore between tries. */ | |
1541 | ||
1542 | #define match(string, subr, statement) \ | |
1543 | if (gfc_match(string) == MATCH_YES) { m = subr(); goto got_match; } | |
1544 | ||
1545 | gfc_clear_error (); | |
1546 | ||
1547 | match ("allocate", gfc_match_allocate, ST_ALLOCATE) | |
5056a350 SK |
1548 | match ("assign", gfc_match_assign, ST_LABEL_ASSIGNMENT) |
1549 | match ("backspace", gfc_match_backspace, ST_BACKSPACE) | |
1550 | match ("call", gfc_match_call, ST_CALL) | |
1551 | match ("close", gfc_match_close, ST_CLOSE) | |
1552 | match ("continue", gfc_match_continue, ST_CONTINUE) | |
1553 | match ("cycle", gfc_match_cycle, ST_CYCLE) | |
1554 | match ("deallocate", gfc_match_deallocate, ST_DEALLOCATE) | |
1555 | match ("end file", gfc_match_endfile, ST_END_FILE) | |
d0a4a61c | 1556 | match ("error stop", gfc_match_error_stop, ST_ERROR_STOP) |
5056a350 SK |
1557 | match ("exit", gfc_match_exit, ST_EXIT) |
1558 | match ("flush", gfc_match_flush, ST_FLUSH) | |
1559 | match ("forall", match_simple_forall, ST_FORALL) | |
1560 | match ("go to", gfc_match_goto, ST_GOTO) | |
1561 | match ("if", match_arithmetic_if, ST_ARITHMETIC_IF) | |
1562 | match ("inquire", gfc_match_inquire, ST_INQUIRE) | |
5493aa17 | 1563 | match ("lock", gfc_match_lock, ST_LOCK) |
5056a350 SK |
1564 | match ("nullify", gfc_match_nullify, ST_NULLIFY) |
1565 | match ("open", gfc_match_open, ST_OPEN) | |
1566 | match ("pause", gfc_match_pause, ST_NONE) | |
1567 | match ("print", gfc_match_print, ST_WRITE) | |
1568 | match ("read", gfc_match_read, ST_READ) | |
1569 | match ("return", gfc_match_return, ST_RETURN) | |
1570 | match ("rewind", gfc_match_rewind, ST_REWIND) | |
1571 | match ("stop", gfc_match_stop, ST_STOP) | |
6f0f0b2e | 1572 | match ("wait", gfc_match_wait, ST_WAIT) |
d0a4a61c TB |
1573 | match ("sync all", gfc_match_sync_all, ST_SYNC_CALL); |
1574 | match ("sync images", gfc_match_sync_images, ST_SYNC_IMAGES); | |
1575 | match ("sync memory", gfc_match_sync_memory, ST_SYNC_MEMORY); | |
5493aa17 | 1576 | match ("unlock", gfc_match_unlock, ST_UNLOCK) |
5056a350 SK |
1577 | match ("where", match_simple_where, ST_WHERE) |
1578 | match ("write", gfc_match_write, ST_WRITE) | |
1579 | ||
1580 | /* The gfc_match_assignment() above may have returned a MATCH_NO | |
884f22e3 | 1581 | where the assignment was to a named constant. Check that |
5056a350 SK |
1582 | special case here. */ |
1583 | m = gfc_match_assignment (); | |
1584 | if (m == MATCH_NO) | |
1585 | { | |
1586 | gfc_error ("Cannot assign to a named constant at %C"); | |
1587 | gfc_free_expr (expr); | |
1588 | gfc_undo_symbols (); | |
1589 | gfc_current_locus = old_loc; | |
1590 | return MATCH_ERROR; | |
1591 | } | |
6de9cd9a DN |
1592 | |
1593 | /* All else has failed, so give up. See if any of the matchers has | |
1594 | stored an error message of some sort. */ | |
b251af97 | 1595 | if (gfc_error_check () == 0) |
6de9cd9a DN |
1596 | gfc_error ("Unclassifiable statement in IF-clause at %C"); |
1597 | ||
1598 | gfc_free_expr (expr); | |
1599 | return MATCH_ERROR; | |
1600 | ||
1601 | got_match: | |
1602 | if (m == MATCH_NO) | |
1603 | gfc_error ("Syntax error in IF-clause at %C"); | |
1604 | if (m != MATCH_YES) | |
1605 | { | |
1606 | gfc_free_expr (expr); | |
1607 | return MATCH_ERROR; | |
1608 | } | |
1609 | ||
1610 | /* At this point, we've matched the single IF and the action clause | |
1611 | is in new_st. Rearrange things so that the IF statement appears | |
1612 | in new_st. */ | |
1613 | ||
1614 | p = gfc_get_code (); | |
1615 | p->next = gfc_get_code (); | |
1616 | *p->next = new_st; | |
63645982 | 1617 | p->next->loc = gfc_current_locus; |
6de9cd9a | 1618 | |
a513927a | 1619 | p->expr1 = expr; |
6de9cd9a DN |
1620 | p->op = EXEC_IF; |
1621 | ||
1622 | gfc_clear_new_st (); | |
1623 | ||
1624 | new_st.op = EXEC_IF; | |
1625 | new_st.block = p; | |
1626 | ||
1627 | return MATCH_YES; | |
1628 | } | |
1629 | ||
1630 | #undef match | |
1631 | ||
1632 | ||
1633 | /* Match an ELSE statement. */ | |
1634 | ||
1635 | match | |
1636 | gfc_match_else (void) | |
1637 | { | |
1638 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1639 | ||
1640 | if (gfc_match_eos () == MATCH_YES) | |
1641 | return MATCH_YES; | |
1642 | ||
1643 | if (gfc_match_name (name) != MATCH_YES | |
1644 | || gfc_current_block () == NULL | |
1645 | || gfc_match_eos () != MATCH_YES) | |
1646 | { | |
1647 | gfc_error ("Unexpected junk after ELSE statement at %C"); | |
1648 | return MATCH_ERROR; | |
1649 | } | |
1650 | ||
1651 | if (strcmp (name, gfc_current_block ()->name) != 0) | |
1652 | { | |
1653 | gfc_error ("Label '%s' at %C doesn't match IF label '%s'", | |
1654 | name, gfc_current_block ()->name); | |
1655 | return MATCH_ERROR; | |
1656 | } | |
1657 | ||
1658 | return MATCH_YES; | |
1659 | } | |
1660 | ||
1661 | ||
1662 | /* Match an ELSE IF statement. */ | |
1663 | ||
1664 | match | |
1665 | gfc_match_elseif (void) | |
1666 | { | |
1667 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1668 | gfc_expr *expr; | |
1669 | match m; | |
1670 | ||
1671 | m = gfc_match (" ( %e ) then", &expr); | |
1672 | if (m != MATCH_YES) | |
1673 | return m; | |
1674 | ||
1675 | if (gfc_match_eos () == MATCH_YES) | |
1676 | goto done; | |
1677 | ||
1678 | if (gfc_match_name (name) != MATCH_YES | |
1679 | || gfc_current_block () == NULL | |
1680 | || gfc_match_eos () != MATCH_YES) | |
1681 | { | |
1682 | gfc_error ("Unexpected junk after ELSE IF statement at %C"); | |
1683 | goto cleanup; | |
1684 | } | |
1685 | ||
1686 | if (strcmp (name, gfc_current_block ()->name) != 0) | |
1687 | { | |
1688 | gfc_error ("Label '%s' at %C doesn't match IF label '%s'", | |
1689 | name, gfc_current_block ()->name); | |
1690 | goto cleanup; | |
1691 | } | |
1692 | ||
1693 | done: | |
1694 | new_st.op = EXEC_IF; | |
a513927a | 1695 | new_st.expr1 = expr; |
6de9cd9a DN |
1696 | return MATCH_YES; |
1697 | ||
1698 | cleanup: | |
1699 | gfc_free_expr (expr); | |
1700 | return MATCH_ERROR; | |
1701 | } | |
1702 | ||
1703 | ||
1704 | /* Free a gfc_iterator structure. */ | |
1705 | ||
1706 | void | |
b251af97 | 1707 | gfc_free_iterator (gfc_iterator *iter, int flag) |
6de9cd9a | 1708 | { |
66e4ab31 | 1709 | |
6de9cd9a DN |
1710 | if (iter == NULL) |
1711 | return; | |
1712 | ||
1713 | gfc_free_expr (iter->var); | |
1714 | gfc_free_expr (iter->start); | |
1715 | gfc_free_expr (iter->end); | |
1716 | gfc_free_expr (iter->step); | |
1717 | ||
1718 | if (flag) | |
cede9502 | 1719 | free (iter); |
6de9cd9a DN |
1720 | } |
1721 | ||
1722 | ||
d0a4a61c TB |
1723 | /* Match a CRITICAL statement. */ |
1724 | match | |
1725 | gfc_match_critical (void) | |
1726 | { | |
1727 | gfc_st_label *label = NULL; | |
1728 | ||
1729 | if (gfc_match_label () == MATCH_ERROR) | |
1730 | return MATCH_ERROR; | |
1731 | ||
1732 | if (gfc_match (" critical") != MATCH_YES) | |
1733 | return MATCH_NO; | |
1734 | ||
1735 | if (gfc_match_st_label (&label) == MATCH_ERROR) | |
1736 | return MATCH_ERROR; | |
1737 | ||
1738 | if (gfc_match_eos () != MATCH_YES) | |
1739 | { | |
1740 | gfc_syntax_error (ST_CRITICAL); | |
1741 | return MATCH_ERROR; | |
1742 | } | |
1743 | ||
1744 | if (gfc_pure (NULL)) | |
1745 | { | |
1746 | gfc_error ("Image control statement CRITICAL at %C in PURE procedure"); | |
1747 | return MATCH_ERROR; | |
1748 | } | |
1749 | ||
8c6a85e3 TB |
1750 | if (gfc_find_state (COMP_DO_CONCURRENT) == SUCCESS) |
1751 | { | |
1752 | gfc_error ("Image control statement CRITICAL at %C in DO CONCURRENT " | |
1753 | "block"); | |
1754 | return MATCH_ERROR; | |
1755 | } | |
1756 | ||
f1f39033 PT |
1757 | if (gfc_implicit_pure (NULL)) |
1758 | gfc_current_ns->proc_name->attr.implicit_pure = 0; | |
1759 | ||
d0a4a61c TB |
1760 | if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: CRITICAL statement at %C") |
1761 | == FAILURE) | |
1762 | return MATCH_ERROR; | |
1763 | ||
f4d1d50a TB |
1764 | if (gfc_option.coarray == GFC_FCOARRAY_NONE) |
1765 | { | |
64f002ed | 1766 | gfc_fatal_error ("Coarrays disabled at %C, use -fcoarray= to enable"); |
f4d1d50a TB |
1767 | return MATCH_ERROR; |
1768 | } | |
1769 | ||
d0a4a61c TB |
1770 | if (gfc_find_state (COMP_CRITICAL) == SUCCESS) |
1771 | { | |
1772 | gfc_error ("Nested CRITICAL block at %C"); | |
1773 | return MATCH_ERROR; | |
1774 | } | |
1775 | ||
1776 | new_st.op = EXEC_CRITICAL; | |
1777 | ||
1778 | if (label != NULL | |
1779 | && gfc_reference_st_label (label, ST_LABEL_TARGET) == FAILURE) | |
1780 | return MATCH_ERROR; | |
1781 | ||
1782 | return MATCH_YES; | |
1783 | } | |
1784 | ||
1785 | ||
9abe5e56 DK |
1786 | /* Match a BLOCK statement. */ |
1787 | ||
1788 | match | |
1789 | gfc_match_block (void) | |
1790 | { | |
1791 | match m; | |
1792 | ||
1793 | if (gfc_match_label () == MATCH_ERROR) | |
1794 | return MATCH_ERROR; | |
1795 | ||
1796 | if (gfc_match (" block") != MATCH_YES) | |
1797 | return MATCH_NO; | |
1798 | ||
1799 | /* For this to be a correct BLOCK statement, the line must end now. */ | |
1800 | m = gfc_match_eos (); | |
1801 | if (m == MATCH_ERROR) | |
1802 | return MATCH_ERROR; | |
1803 | if (m == MATCH_NO) | |
1804 | return MATCH_NO; | |
1805 | ||
1806 | return MATCH_YES; | |
1807 | } | |
1808 | ||
1809 | ||
03af1e4c DK |
1810 | /* Match an ASSOCIATE statement. */ |
1811 | ||
1812 | match | |
1813 | gfc_match_associate (void) | |
1814 | { | |
1815 | if (gfc_match_label () == MATCH_ERROR) | |
1816 | return MATCH_ERROR; | |
1817 | ||
1818 | if (gfc_match (" associate") != MATCH_YES) | |
1819 | return MATCH_NO; | |
1820 | ||
1821 | /* Match the association list. */ | |
1822 | if (gfc_match_char ('(') != MATCH_YES) | |
1823 | { | |
1824 | gfc_error ("Expected association list at %C"); | |
1825 | return MATCH_ERROR; | |
1826 | } | |
1827 | new_st.ext.block.assoc = NULL; | |
1828 | while (true) | |
1829 | { | |
1830 | gfc_association_list* newAssoc = gfc_get_association_list (); | |
1831 | gfc_association_list* a; | |
1832 | ||
1833 | /* Match the next association. */ | |
1834 | if (gfc_match (" %n => %e", newAssoc->name, &newAssoc->target) | |
1835 | != MATCH_YES) | |
1836 | { | |
1837 | gfc_error ("Expected association at %C"); | |
1838 | goto assocListError; | |
1839 | } | |
571d54de | 1840 | newAssoc->where = gfc_current_locus; |
03af1e4c DK |
1841 | |
1842 | /* Check that the current name is not yet in the list. */ | |
1843 | for (a = new_st.ext.block.assoc; a; a = a->next) | |
1844 | if (!strcmp (a->name, newAssoc->name)) | |
1845 | { | |
1846 | gfc_error ("Duplicate name '%s' in association at %C", | |
1847 | newAssoc->name); | |
1848 | goto assocListError; | |
1849 | } | |
1850 | ||
1851 | /* The target expression must not be coindexed. */ | |
1852 | if (gfc_is_coindexed (newAssoc->target)) | |
1853 | { | |
1854 | gfc_error ("Association target at %C must not be coindexed"); | |
1855 | goto assocListError; | |
1856 | } | |
1857 | ||
571d54de DK |
1858 | /* The `variable' field is left blank for now; because the target is not |
1859 | yet resolved, we can't use gfc_has_vector_subscript to determine it | |
8c91ab34 | 1860 | for now. This is set during resolution. */ |
03af1e4c DK |
1861 | |
1862 | /* Put it into the list. */ | |
1863 | newAssoc->next = new_st.ext.block.assoc; | |
1864 | new_st.ext.block.assoc = newAssoc; | |
1865 | ||
1866 | /* Try next one or end if closing parenthesis is found. */ | |
1867 | gfc_gobble_whitespace (); | |
1868 | if (gfc_peek_char () == ')') | |
1869 | break; | |
1870 | if (gfc_match_char (',') != MATCH_YES) | |
1871 | { | |
1872 | gfc_error ("Expected ')' or ',' at %C"); | |
1873 | return MATCH_ERROR; | |
1874 | } | |
1875 | ||
1876 | continue; | |
1877 | ||
1878 | assocListError: | |
cede9502 | 1879 | free (newAssoc); |
03af1e4c DK |
1880 | goto error; |
1881 | } | |
1882 | if (gfc_match_char (')') != MATCH_YES) | |
1883 | { | |
1884 | /* This should never happen as we peek above. */ | |
1885 | gcc_unreachable (); | |
1886 | } | |
1887 | ||
1888 | if (gfc_match_eos () != MATCH_YES) | |
1889 | { | |
1890 | gfc_error ("Junk after ASSOCIATE statement at %C"); | |
1891 | goto error; | |
1892 | } | |
1893 | ||
1894 | return MATCH_YES; | |
1895 | ||
1896 | error: | |
1897 | gfc_free_association_list (new_st.ext.block.assoc); | |
1898 | return MATCH_ERROR; | |
1899 | } | |
1900 | ||
1901 | ||
8c6a85e3 TB |
1902 | /* Match a Fortran 2003 derived-type-spec (F03:R455), which is just the name of |
1903 | an accessible derived type. */ | |
6de9cd9a | 1904 | |
8c6a85e3 TB |
1905 | static match |
1906 | match_derived_type_spec (gfc_typespec *ts) | |
6de9cd9a | 1907 | { |
8c6a85e3 TB |
1908 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
1909 | locus old_locus; | |
1910 | gfc_symbol *derived; | |
6de9cd9a | 1911 | |
8c6a85e3 | 1912 | old_locus = gfc_current_locus; |
6de9cd9a | 1913 | |
8c6a85e3 TB |
1914 | if (gfc_match ("%n", name) != MATCH_YES) |
1915 | { | |
1916 | gfc_current_locus = old_locus; | |
1917 | return MATCH_NO; | |
1918 | } | |
6de9cd9a | 1919 | |
8c6a85e3 | 1920 | gfc_find_symbol (name, NULL, 1, &derived); |
6de9cd9a | 1921 | |
c3f34952 TB |
1922 | if (derived && derived->attr.flavor == FL_PROCEDURE && derived->attr.generic) |
1923 | derived = gfc_find_dt_in_generic (derived); | |
1924 | ||
8c6a85e3 TB |
1925 | if (derived && derived->attr.flavor == FL_DERIVED) |
1926 | { | |
1927 | ts->type = BT_DERIVED; | |
1928 | ts->u.derived = derived; | |
1929 | return MATCH_YES; | |
1930 | } | |
6de9cd9a | 1931 | |
8c6a85e3 TB |
1932 | gfc_current_locus = old_locus; |
1933 | return MATCH_NO; | |
1934 | } | |
9b089e05 | 1935 | |
6de9cd9a | 1936 | |
8c6a85e3 TB |
1937 | /* Match a Fortran 2003 type-spec (F03:R401). This is similar to |
1938 | gfc_match_decl_type_spec() from decl.c, with the following exceptions: | |
1939 | It only includes the intrinsic types from the Fortran 2003 standard | |
1940 | (thus, neither BYTE nor forms like REAL*4 are allowed). Additionally, | |
1941 | the implicit_flag is not needed, so it was removed. Derived types are | |
1942 | identified by their name alone. */ | |
1943 | ||
1944 | static match | |
1945 | match_type_spec (gfc_typespec *ts) | |
1946 | { | |
1947 | match m; | |
1948 | locus old_locus; | |
1949 | ||
1950 | gfc_clear_ts (ts); | |
1951 | gfc_gobble_whitespace (); | |
1952 | old_locus = gfc_current_locus; | |
1953 | ||
1954 | if (match_derived_type_spec (ts) == MATCH_YES) | |
6de9cd9a | 1955 | { |
8c6a85e3 TB |
1956 | /* Enforce F03:C401. */ |
1957 | if (ts->u.derived->attr.abstract) | |
1958 | { | |
1959 | gfc_error ("Derived type '%s' at %L may not be ABSTRACT", | |
1960 | ts->u.derived->name, &old_locus); | |
1961 | return MATCH_ERROR; | |
1962 | } | |
1963 | return MATCH_YES; | |
6de9cd9a DN |
1964 | } |
1965 | ||
8c6a85e3 TB |
1966 | if (gfc_match ("integer") == MATCH_YES) |
1967 | { | |
1968 | ts->type = BT_INTEGER; | |
1969 | ts->kind = gfc_default_integer_kind; | |
1970 | goto kind_selector; | |
1971 | } | |
6de9cd9a | 1972 | |
8c6a85e3 TB |
1973 | if (gfc_match ("real") == MATCH_YES) |
1974 | { | |
1975 | ts->type = BT_REAL; | |
1976 | ts->kind = gfc_default_real_kind; | |
1977 | goto kind_selector; | |
1978 | } | |
acb388a0 | 1979 | |
8c6a85e3 | 1980 | if (gfc_match ("double precision") == MATCH_YES) |
6de9cd9a | 1981 | { |
8c6a85e3 TB |
1982 | ts->type = BT_REAL; |
1983 | ts->kind = gfc_default_double_kind; | |
1984 | return MATCH_YES; | |
6de9cd9a DN |
1985 | } |
1986 | ||
8c6a85e3 TB |
1987 | if (gfc_match ("complex") == MATCH_YES) |
1988 | { | |
1989 | ts->type = BT_COMPLEX; | |
1990 | ts->kind = gfc_default_complex_kind; | |
1991 | goto kind_selector; | |
1992 | } | |
6de9cd9a | 1993 | |
8c6a85e3 TB |
1994 | if (gfc_match ("character") == MATCH_YES) |
1995 | { | |
1996 | ts->type = BT_CHARACTER; | |
6de9cd9a | 1997 | |
8c6a85e3 | 1998 | m = gfc_match_char_spec (ts); |
6de9cd9a | 1999 | |
8c6a85e3 TB |
2000 | if (m == MATCH_NO) |
2001 | m = MATCH_YES; | |
6de9cd9a | 2002 | |
8c6a85e3 TB |
2003 | return m; |
2004 | } | |
c9583ed2 | 2005 | |
8c6a85e3 | 2006 | if (gfc_match ("logical") == MATCH_YES) |
6de9cd9a | 2007 | { |
8c6a85e3 TB |
2008 | ts->type = BT_LOGICAL; |
2009 | ts->kind = gfc_default_logical_kind; | |
2010 | goto kind_selector; | |
6de9cd9a DN |
2011 | } |
2012 | ||
8c6a85e3 TB |
2013 | /* If a type is not matched, simply return MATCH_NO. */ |
2014 | gfc_current_locus = old_locus; | |
2015 | return MATCH_NO; | |
6de9cd9a | 2016 | |
8c6a85e3 | 2017 | kind_selector: |
6de9cd9a | 2018 | |
8c6a85e3 TB |
2019 | gfc_gobble_whitespace (); |
2020 | if (gfc_peek_ascii_char () == '*') | |
6de9cd9a | 2021 | { |
8c6a85e3 TB |
2022 | gfc_error ("Invalid type-spec at %C"); |
2023 | return MATCH_ERROR; | |
6de9cd9a DN |
2024 | } |
2025 | ||
8c6a85e3 | 2026 | m = gfc_match_kind_spec (ts, false); |
6de9cd9a | 2027 | |
8c6a85e3 TB |
2028 | if (m == MATCH_NO) |
2029 | m = MATCH_YES; /* No kind specifier found. */ | |
6de9cd9a | 2030 | |
8c6a85e3 | 2031 | return m; |
6de9cd9a DN |
2032 | } |
2033 | ||
2034 | ||
8c6a85e3 | 2035 | /******************** FORALL subroutines ********************/ |
6de9cd9a | 2036 | |
8c6a85e3 TB |
2037 | /* Free a list of FORALL iterators. */ |
2038 | ||
2039 | void | |
2040 | gfc_free_forall_iterator (gfc_forall_iterator *iter) | |
6de9cd9a | 2041 | { |
8c6a85e3 | 2042 | gfc_forall_iterator *next; |
6de9cd9a | 2043 | |
8c6a85e3 | 2044 | while (iter) |
6de9cd9a | 2045 | { |
8c6a85e3 TB |
2046 | next = iter->next; |
2047 | gfc_free_expr (iter->var); | |
2048 | gfc_free_expr (iter->start); | |
2049 | gfc_free_expr (iter->end); | |
2050 | gfc_free_expr (iter->stride); | |
2051 | free (iter); | |
2052 | iter = next; | |
2053 | } | |
2054 | } | |
61b644c2 | 2055 | |
6de9cd9a | 2056 | |
8c6a85e3 | 2057 | /* Match an iterator as part of a FORALL statement. The format is: |
61b644c2 | 2058 | |
8c6a85e3 | 2059 | <var> = <start>:<end>[:<stride>] |
6de9cd9a | 2060 | |
8c6a85e3 TB |
2061 | On MATCH_NO, the caller tests for the possibility that there is a |
2062 | scalar mask expression. */ | |
6de9cd9a | 2063 | |
8c6a85e3 TB |
2064 | static match |
2065 | match_forall_iterator (gfc_forall_iterator **result) | |
2066 | { | |
2067 | gfc_forall_iterator *iter; | |
2068 | locus where; | |
2069 | match m; | |
6de9cd9a | 2070 | |
8c6a85e3 TB |
2071 | where = gfc_current_locus; |
2072 | iter = XCNEW (gfc_forall_iterator); | |
6de9cd9a | 2073 | |
8c6a85e3 TB |
2074 | m = gfc_match_expr (&iter->var); |
2075 | if (m != MATCH_YES) | |
2076 | goto cleanup; | |
2077 | ||
2078 | if (gfc_match_char ('=') != MATCH_YES | |
2079 | || iter->var->expr_type != EXPR_VARIABLE) | |
e5ca9693 | 2080 | { |
8c6a85e3 TB |
2081 | m = MATCH_NO; |
2082 | goto cleanup; | |
2083 | } | |
e5ca9693 | 2084 | |
8c6a85e3 TB |
2085 | m = gfc_match_expr (&iter->start); |
2086 | if (m != MATCH_YES) | |
2087 | goto cleanup; | |
e5ca9693 | 2088 | |
8c6a85e3 TB |
2089 | if (gfc_match_char (':') != MATCH_YES) |
2090 | goto syntax; | |
e5ca9693 | 2091 | |
8c6a85e3 TB |
2092 | m = gfc_match_expr (&iter->end); |
2093 | if (m == MATCH_NO) | |
2094 | goto syntax; | |
2095 | if (m == MATCH_ERROR) | |
2096 | goto cleanup; | |
84fa59a7 | 2097 | |
8c6a85e3 TB |
2098 | if (gfc_match_char (':') == MATCH_NO) |
2099 | iter->stride = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1); | |
2100 | else | |
6c7a4dfd | 2101 | { |
8c6a85e3 TB |
2102 | m = gfc_match_expr (&iter->stride); |
2103 | if (m == MATCH_NO) | |
2104 | goto syntax; | |
2105 | if (m == MATCH_ERROR) | |
2106 | goto cleanup; | |
6c7a4dfd JJ |
2107 | } |
2108 | ||
8c6a85e3 TB |
2109 | /* Mark the iteration variable's symbol as used as a FORALL index. */ |
2110 | iter->var->symtree->n.sym->forall_index = true; | |
6de9cd9a | 2111 | |
8c6a85e3 | 2112 | *result = iter; |
6de9cd9a | 2113 | return MATCH_YES; |
6de9cd9a | 2114 | |
8c6a85e3 TB |
2115 | syntax: |
2116 | gfc_error ("Syntax error in FORALL iterator at %C"); | |
2117 | m = MATCH_ERROR; | |
6de9cd9a | 2118 | |
8c6a85e3 | 2119 | cleanup: |
6de9cd9a | 2120 | |
8c6a85e3 TB |
2121 | gfc_current_locus = where; |
2122 | gfc_free_forall_iterator (iter); | |
2123 | return m; | |
6de9cd9a DN |
2124 | } |
2125 | ||
2126 | ||
8c6a85e3 | 2127 | /* Match the header of a FORALL statement. */ |
6de9cd9a DN |
2128 | |
2129 | static match | |
8c6a85e3 | 2130 | match_forall_header (gfc_forall_iterator **phead, gfc_expr **mask) |
6de9cd9a | 2131 | { |
8c6a85e3 TB |
2132 | gfc_forall_iterator *head, *tail, *new_iter; |
2133 | gfc_expr *msk; | |
6de9cd9a DN |
2134 | match m; |
2135 | ||
8c6a85e3 | 2136 | gfc_gobble_whitespace (); |
6de9cd9a | 2137 | |
8c6a85e3 TB |
2138 | head = tail = NULL; |
2139 | msk = NULL; | |
6de9cd9a | 2140 | |
8c6a85e3 TB |
2141 | if (gfc_match_char ('(') != MATCH_YES) |
2142 | return MATCH_NO; | |
6d1b0f92 | 2143 | |
8c6a85e3 TB |
2144 | m = match_forall_iterator (&new_iter); |
2145 | if (m == MATCH_ERROR) | |
2146 | goto cleanup; | |
2147 | if (m == MATCH_NO) | |
2148 | goto syntax; | |
6de9cd9a | 2149 | |
8c6a85e3 | 2150 | head = tail = new_iter; |
f1f39033 | 2151 | |
8c6a85e3 | 2152 | for (;;) |
d0a4a61c | 2153 | { |
8c6a85e3 TB |
2154 | if (gfc_match_char (',') != MATCH_YES) |
2155 | break; | |
d0a4a61c | 2156 | |
8c6a85e3 TB |
2157 | m = match_forall_iterator (&new_iter); |
2158 | if (m == MATCH_ERROR) | |
2159 | goto cleanup; | |
5d2d72cb | 2160 | |
8c6a85e3 | 2161 | if (m == MATCH_YES) |
5d2d72cb | 2162 | { |
8c6a85e3 TB |
2163 | tail->next = new_iter; |
2164 | tail = new_iter; | |
2165 | continue; | |
6d1b0f92 JD |
2166 | } |
2167 | ||
8c6a85e3 | 2168 | /* Have to have a mask expression. */ |
6d1b0f92 | 2169 | |
8c6a85e3 TB |
2170 | m = gfc_match_expr (&msk); |
2171 | if (m == MATCH_NO) | |
2172 | goto syntax; | |
2173 | if (m == MATCH_ERROR) | |
2174 | goto cleanup; | |
6d1b0f92 | 2175 | |
d0a4a61c | 2176 | break; |
d0a4a61c TB |
2177 | } |
2178 | ||
8c6a85e3 TB |
2179 | if (gfc_match_char (')') == MATCH_NO) |
2180 | goto syntax; | |
6de9cd9a | 2181 | |
8c6a85e3 TB |
2182 | *phead = head; |
2183 | *mask = msk; | |
6de9cd9a DN |
2184 | return MATCH_YES; |
2185 | ||
2186 | syntax: | |
8c6a85e3 | 2187 | gfc_syntax_error (ST_FORALL); |
6de9cd9a DN |
2188 | |
2189 | cleanup: | |
8c6a85e3 TB |
2190 | gfc_free_expr (msk); |
2191 | gfc_free_forall_iterator (head); | |
6de9cd9a | 2192 | |
6de9cd9a DN |
2193 | return MATCH_ERROR; |
2194 | } | |
2195 | ||
8c6a85e3 TB |
2196 | /* Match the rest of a simple FORALL statement that follows an |
2197 | IF statement. */ | |
66e4ab31 | 2198 | |
8c6a85e3 TB |
2199 | static match |
2200 | match_simple_forall (void) | |
6de9cd9a | 2201 | { |
8c6a85e3 TB |
2202 | gfc_forall_iterator *head; |
2203 | gfc_expr *mask; | |
2204 | gfc_code *c; | |
6de9cd9a DN |
2205 | match m; |
2206 | ||
8c6a85e3 TB |
2207 | mask = NULL; |
2208 | head = NULL; | |
2209 | c = NULL; | |
6de9cd9a | 2210 | |
8c6a85e3 | 2211 | m = match_forall_header (&head, &mask); |
6de9cd9a | 2212 | |
8c6a85e3 TB |
2213 | if (m == MATCH_NO) |
2214 | goto syntax; | |
2215 | if (m != MATCH_YES) | |
2216 | goto cleanup; | |
6de9cd9a | 2217 | |
8c6a85e3 | 2218 | m = gfc_match_assignment (); |
6de9cd9a | 2219 | |
8c6a85e3 TB |
2220 | if (m == MATCH_ERROR) |
2221 | goto cleanup; | |
2222 | if (m == MATCH_NO) | |
2223 | { | |
2224 | m = gfc_match_pointer_assignment (); | |
2225 | if (m == MATCH_ERROR) | |
2226 | goto cleanup; | |
2227 | if (m == MATCH_NO) | |
2228 | goto syntax; | |
2229 | } | |
6de9cd9a | 2230 | |
8c6a85e3 TB |
2231 | c = gfc_get_code (); |
2232 | *c = new_st; | |
2233 | c->loc = gfc_current_locus; | |
d0a4a61c | 2234 | |
8c6a85e3 TB |
2235 | if (gfc_match_eos () != MATCH_YES) |
2236 | goto syntax; | |
d0a4a61c | 2237 | |
8c6a85e3 TB |
2238 | gfc_clear_new_st (); |
2239 | new_st.op = EXEC_FORALL; | |
2240 | new_st.expr1 = mask; | |
2241 | new_st.ext.forall_iterator = head; | |
2242 | new_st.block = gfc_get_code (); | |
d0a4a61c | 2243 | |
8c6a85e3 TB |
2244 | new_st.block->op = EXEC_FORALL; |
2245 | new_st.block->next = c; | |
d0a4a61c | 2246 | |
8c6a85e3 | 2247 | return MATCH_YES; |
5493aa17 | 2248 | |
8c6a85e3 TB |
2249 | syntax: |
2250 | gfc_syntax_error (ST_FORALL); | |
5493aa17 | 2251 | |
8c6a85e3 TB |
2252 | cleanup: |
2253 | gfc_free_forall_iterator (head); | |
2254 | gfc_free_expr (mask); | |
5493aa17 | 2255 | |
8c6a85e3 TB |
2256 | return MATCH_ERROR; |
2257 | } | |
5493aa17 | 2258 | |
5493aa17 | 2259 | |
8c6a85e3 | 2260 | /* Match a FORALL statement. */ |
5493aa17 | 2261 | |
8c6a85e3 TB |
2262 | match |
2263 | gfc_match_forall (gfc_statement *st) | |
2264 | { | |
2265 | gfc_forall_iterator *head; | |
2266 | gfc_expr *mask; | |
2267 | gfc_code *c; | |
2268 | match m0, m; | |
5493aa17 | 2269 | |
8c6a85e3 TB |
2270 | head = NULL; |
2271 | mask = NULL; | |
2272 | c = NULL; | |
5493aa17 | 2273 | |
8c6a85e3 TB |
2274 | m0 = gfc_match_label (); |
2275 | if (m0 == MATCH_ERROR) | |
2276 | return MATCH_ERROR; | |
2277 | ||
2278 | m = gfc_match (" forall"); | |
2279 | if (m != MATCH_YES) | |
2280 | return m; | |
2281 | ||
2282 | m = match_forall_header (&head, &mask); | |
5493aa17 | 2283 | if (m == MATCH_ERROR) |
8c6a85e3 | 2284 | goto cleanup; |
5493aa17 | 2285 | if (m == MATCH_NO) |
8c6a85e3 TB |
2286 | goto syntax; |
2287 | ||
2288 | if (gfc_match_eos () == MATCH_YES) | |
5493aa17 | 2289 | { |
8c6a85e3 TB |
2290 | *st = ST_FORALL_BLOCK; |
2291 | new_st.op = EXEC_FORALL; | |
2292 | new_st.expr1 = mask; | |
2293 | new_st.ext.forall_iterator = head; | |
2294 | return MATCH_YES; | |
5493aa17 TB |
2295 | } |
2296 | ||
8c6a85e3 TB |
2297 | m = gfc_match_assignment (); |
2298 | if (m == MATCH_ERROR) | |
2299 | goto cleanup; | |
2300 | if (m == MATCH_NO) | |
5493aa17 | 2301 | { |
8c6a85e3 | 2302 | m = gfc_match_pointer_assignment (); |
5493aa17 | 2303 | if (m == MATCH_ERROR) |
8c6a85e3 TB |
2304 | goto cleanup; |
2305 | if (m == MATCH_NO) | |
5493aa17 | 2306 | goto syntax; |
8c6a85e3 | 2307 | } |
5493aa17 | 2308 | |
8c6a85e3 TB |
2309 | c = gfc_get_code (); |
2310 | *c = new_st; | |
2311 | c->loc = gfc_current_locus; | |
5493aa17 | 2312 | |
8c6a85e3 TB |
2313 | gfc_clear_new_st (); |
2314 | new_st.op = EXEC_FORALL; | |
2315 | new_st.expr1 = mask; | |
2316 | new_st.ext.forall_iterator = head; | |
2317 | new_st.block = gfc_get_code (); | |
2318 | new_st.block->op = EXEC_FORALL; | |
2319 | new_st.block->next = c; | |
5493aa17 | 2320 | |
8c6a85e3 TB |
2321 | *st = ST_FORALL; |
2322 | return MATCH_YES; | |
5493aa17 | 2323 | |
8c6a85e3 TB |
2324 | syntax: |
2325 | gfc_syntax_error (ST_FORALL); | |
5493aa17 | 2326 | |
8c6a85e3 TB |
2327 | cleanup: |
2328 | gfc_free_forall_iterator (head); | |
2329 | gfc_free_expr (mask); | |
2330 | gfc_free_statements (c); | |
2331 | return MATCH_NO; | |
2332 | } | |
5493aa17 | 2333 | |
5493aa17 | 2334 | |
8c6a85e3 | 2335 | /* Match a DO statement. */ |
5493aa17 | 2336 | |
8c6a85e3 TB |
2337 | match |
2338 | gfc_match_do (void) | |
2339 | { | |
2340 | gfc_iterator iter, *ip; | |
2341 | locus old_loc; | |
2342 | gfc_st_label *label; | |
2343 | match m; | |
5493aa17 | 2344 | |
8c6a85e3 TB |
2345 | old_loc = gfc_current_locus; |
2346 | ||
2347 | label = NULL; | |
2348 | iter.var = iter.start = iter.end = iter.step = NULL; | |
5493aa17 | 2349 | |
8c6a85e3 | 2350 | m = gfc_match_label (); |
5493aa17 | 2351 | if (m == MATCH_ERROR) |
8c6a85e3 | 2352 | return m; |
5493aa17 | 2353 | |
8c6a85e3 TB |
2354 | if (gfc_match (" do") != MATCH_YES) |
2355 | return MATCH_NO; | |
5493aa17 | 2356 | |
8c6a85e3 TB |
2357 | m = gfc_match_st_label (&label); |
2358 | if (m == MATCH_ERROR) | |
2359 | goto cleanup; | |
2360 | ||
2361 | /* Match an infinite DO, make it like a DO WHILE(.TRUE.). */ | |
2362 | ||
2363 | if (gfc_match_eos () == MATCH_YES) | |
5493aa17 | 2364 | { |
8c6a85e3 TB |
2365 | iter.end = gfc_get_logical_expr (gfc_default_logical_kind, NULL, true); |
2366 | new_st.op = EXEC_DO_WHILE; | |
2367 | goto done; | |
5493aa17 TB |
2368 | } |
2369 | ||
8c6a85e3 TB |
2370 | /* Match an optional comma, if no comma is found, a space is obligatory. */ |
2371 | if (gfc_match_char (',') != MATCH_YES && gfc_match ("% ") != MATCH_YES) | |
2372 | return MATCH_NO; | |
5493aa17 | 2373 | |
8c6a85e3 TB |
2374 | /* Check for balanced parens. */ |
2375 | ||
2376 | if (gfc_match_parens () == MATCH_ERROR) | |
2377 | return MATCH_ERROR; | |
5493aa17 | 2378 | |
8c6a85e3 TB |
2379 | if (gfc_match (" concurrent") == MATCH_YES) |
2380 | { | |
2381 | gfc_forall_iterator *head; | |
2382 | gfc_expr *mask; | |
5493aa17 | 2383 | |
8c6a85e3 TB |
2384 | if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: DO CONCURRENT " |
2385 | "construct at %C") == FAILURE) | |
2386 | return MATCH_ERROR; | |
5493aa17 | 2387 | |
d0a4a61c | 2388 | |
8c6a85e3 TB |
2389 | mask = NULL; |
2390 | head = NULL; | |
2391 | m = match_forall_header (&head, &mask); | |
d0a4a61c | 2392 | |
8c6a85e3 TB |
2393 | if (m == MATCH_NO) |
2394 | return m; | |
2395 | if (m == MATCH_ERROR) | |
2396 | goto concurr_cleanup; | |
d0a4a61c | 2397 | |
8c6a85e3 TB |
2398 | if (gfc_match_eos () != MATCH_YES) |
2399 | goto concurr_cleanup; | |
d0a4a61c | 2400 | |
8c6a85e3 TB |
2401 | if (label != NULL |
2402 | && gfc_reference_st_label (label, ST_LABEL_TARGET) == FAILURE) | |
2403 | goto concurr_cleanup; | |
f1f39033 | 2404 | |
8c6a85e3 TB |
2405 | new_st.label1 = label; |
2406 | new_st.op = EXEC_DO_CONCURRENT; | |
2407 | new_st.expr1 = mask; | |
2408 | new_st.ext.forall_iterator = head; | |
d0a4a61c | 2409 | |
8c6a85e3 | 2410 | return MATCH_YES; |
f4d1d50a | 2411 | |
8c6a85e3 TB |
2412 | concurr_cleanup: |
2413 | gfc_syntax_error (ST_DO); | |
2414 | gfc_free_expr (mask); | |
2415 | gfc_free_forall_iterator (head); | |
d0a4a61c TB |
2416 | return MATCH_ERROR; |
2417 | } | |
5493aa17 | 2418 | |
8c6a85e3 TB |
2419 | /* See if we have a DO WHILE. */ |
2420 | if (gfc_match (" while ( %e )%t", &iter.end) == MATCH_YES) | |
d0a4a61c | 2421 | { |
8c6a85e3 | 2422 | new_st.op = EXEC_DO_WHILE; |
d0a4a61c TB |
2423 | goto done; |
2424 | } | |
2425 | ||
8c6a85e3 TB |
2426 | /* The abortive DO WHILE may have done something to the symbol |
2427 | table, so we start over. */ | |
2428 | gfc_undo_symbols (); | |
2429 | gfc_current_locus = old_loc; | |
5493aa17 | 2430 | |
8c6a85e3 TB |
2431 | gfc_match_label (); /* This won't error. */ |
2432 | gfc_match (" do "); /* This will work. */ | |
d0a4a61c | 2433 | |
8c6a85e3 TB |
2434 | gfc_match_st_label (&label); /* Can't error out. */ |
2435 | gfc_match_char (','); /* Optional comma. */ | |
d0a4a61c | 2436 | |
8c6a85e3 TB |
2437 | m = gfc_match_iterator (&iter, 0); |
2438 | if (m == MATCH_NO) | |
2439 | return MATCH_NO; | |
2440 | if (m == MATCH_ERROR) | |
2441 | goto cleanup; | |
d0a4a61c | 2442 | |
8c6a85e3 TB |
2443 | iter.var->symtree->n.sym->attr.implied_index = 0; |
2444 | gfc_check_do_variable (iter.var->symtree); | |
d0a4a61c | 2445 | |
8c6a85e3 TB |
2446 | if (gfc_match_eos () != MATCH_YES) |
2447 | { | |
2448 | gfc_syntax_error (ST_DO); | |
2449 | goto cleanup; | |
d0a4a61c TB |
2450 | } |
2451 | ||
8c6a85e3 | 2452 | new_st.op = EXEC_DO; |
d0a4a61c TB |
2453 | |
2454 | done: | |
8c6a85e3 TB |
2455 | if (label != NULL |
2456 | && gfc_reference_st_label (label, ST_LABEL_TARGET) == FAILURE) | |
2457 | goto cleanup; | |
2458 | ||
2459 | new_st.label1 = label; | |
2460 | ||
2461 | if (new_st.op == EXEC_DO_WHILE) | |
2462 | new_st.expr1 = iter.end; | |
2463 | else | |
d0a4a61c | 2464 | { |
8c6a85e3 TB |
2465 | new_st.ext.iterator = ip = gfc_get_iterator (); |
2466 | *ip = iter; | |
d0a4a61c TB |
2467 | } |
2468 | ||
d0a4a61c TB |
2469 | return MATCH_YES; |
2470 | ||
d0a4a61c | 2471 | cleanup: |
8c6a85e3 | 2472 | gfc_free_iterator (&iter, 0); |
d0a4a61c TB |
2473 | |
2474 | return MATCH_ERROR; | |
2475 | } | |
2476 | ||
2477 | ||
8c6a85e3 | 2478 | /* Match an EXIT or CYCLE statement. */ |
d0a4a61c | 2479 | |
8c6a85e3 TB |
2480 | static match |
2481 | match_exit_cycle (gfc_statement st, gfc_exec_op op) | |
d0a4a61c | 2482 | { |
8c6a85e3 TB |
2483 | gfc_state_data *p, *o; |
2484 | gfc_symbol *sym; | |
2485 | match m; | |
2486 | int cnt; | |
d0a4a61c | 2487 | |
8c6a85e3 TB |
2488 | if (gfc_match_eos () == MATCH_YES) |
2489 | sym = NULL; | |
2490 | else | |
2491 | { | |
2492 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
2493 | gfc_symtree* stree; | |
d0a4a61c | 2494 | |
8c6a85e3 TB |
2495 | m = gfc_match ("% %n%t", name); |
2496 | if (m == MATCH_ERROR) | |
2497 | return MATCH_ERROR; | |
2498 | if (m == MATCH_NO) | |
2499 | { | |
2500 | gfc_syntax_error (st); | |
2501 | return MATCH_ERROR; | |
2502 | } | |
d0a4a61c | 2503 | |
8c6a85e3 TB |
2504 | /* Find the corresponding symbol. If there's a BLOCK statement |
2505 | between here and the label, it is not in gfc_current_ns but a parent | |
2506 | namespace! */ | |
2507 | stree = gfc_find_symtree_in_proc (name, gfc_current_ns); | |
2508 | if (!stree) | |
2509 | { | |
2510 | gfc_error ("Name '%s' in %s statement at %C is unknown", | |
2511 | name, gfc_ascii_statement (st)); | |
2512 | return MATCH_ERROR; | |
2513 | } | |
d0a4a61c | 2514 | |
8c6a85e3 TB |
2515 | sym = stree->n.sym; |
2516 | if (sym->attr.flavor != FL_LABEL) | |
2517 | { | |
2518 | gfc_error ("Name '%s' in %s statement at %C is not a construct name", | |
2519 | name, gfc_ascii_statement (st)); | |
2520 | return MATCH_ERROR; | |
2521 | } | |
2522 | } | |
d0a4a61c | 2523 | |
8c6a85e3 TB |
2524 | /* Find the loop specified by the label (or lack of a label). */ |
2525 | for (o = NULL, p = gfc_state_stack; p; p = p->previous) | |
2526 | if (o == NULL && p->state == COMP_OMP_STRUCTURED_BLOCK) | |
2527 | o = p; | |
2528 | else if (p->state == COMP_CRITICAL) | |
2529 | { | |
2530 | gfc_error("%s statement at %C leaves CRITICAL construct", | |
2531 | gfc_ascii_statement (st)); | |
2532 | return MATCH_ERROR; | |
2533 | } | |
2534 | else if (p->state == COMP_DO_CONCURRENT | |
2535 | && (op == EXEC_EXIT || (sym && sym != p->sym))) | |
2536 | { | |
2537 | /* F2008, C821 & C845. */ | |
2538 | gfc_error("%s statement at %C leaves DO CONCURRENT construct", | |
2539 | gfc_ascii_statement (st)); | |
2540 | return MATCH_ERROR; | |
2541 | } | |
2542 | else if ((sym && sym == p->sym) | |
2543 | || (!sym && (p->state == COMP_DO | |
2544 | || p->state == COMP_DO_CONCURRENT))) | |
2545 | break; | |
6de9cd9a | 2546 | |
8c6a85e3 | 2547 | if (p == NULL) |
6de9cd9a | 2548 | { |
8c6a85e3 TB |
2549 | if (sym == NULL) |
2550 | gfc_error ("%s statement at %C is not within a construct", | |
2551 | gfc_ascii_statement (st)); | |
2552 | else | |
2553 | gfc_error ("%s statement at %C is not within construct '%s'", | |
2554 | gfc_ascii_statement (st), sym->name); | |
2555 | ||
6de9cd9a DN |
2556 | return MATCH_ERROR; |
2557 | } | |
2558 | ||
8c6a85e3 TB |
2559 | /* Special checks for EXIT from non-loop constructs. */ |
2560 | switch (p->state) | |
2561 | { | |
2562 | case COMP_DO: | |
2563 | case COMP_DO_CONCURRENT: | |
2564 | break; | |
2565 | ||
2566 | case COMP_CRITICAL: | |
2567 | /* This is already handled above. */ | |
2568 | gcc_unreachable (); | |
2569 | ||
2570 | case COMP_ASSOCIATE: | |
2571 | case COMP_BLOCK: | |
2572 | case COMP_IF: | |
2573 | case COMP_SELECT: | |
2574 | case COMP_SELECT_TYPE: | |
2575 | gcc_assert (sym); | |
2576 | if (op == EXEC_CYCLE) | |
2577 | { | |
2578 | gfc_error ("CYCLE statement at %C is not applicable to non-loop" | |
2579 | " construct '%s'", sym->name); | |
2580 | return MATCH_ERROR; | |
2581 | } | |
2582 | gcc_assert (op == EXEC_EXIT); | |
2583 | if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: EXIT statement with no" | |
2584 | " do-construct-name at %C") == FAILURE) | |
2585 | return MATCH_ERROR; | |
2586 | break; | |
2587 | ||
2588 | default: | |
2589 | gfc_error ("%s statement at %C is not applicable to construct '%s'", | |
2590 | gfc_ascii_statement (st), sym->name); | |
2591 | return MATCH_ERROR; | |
2592 | } | |
2593 | ||
2594 | if (o != NULL) | |
2595 | { | |
2596 | gfc_error ("%s statement at %C leaving OpenMP structured block", | |
2597 | gfc_ascii_statement (st)); | |
2598 | return MATCH_ERROR; | |
2599 | } | |
2600 | ||
2601 | for (o = p, cnt = 0; o->state == COMP_DO && o->previous != NULL; cnt++) | |
2602 | o = o->previous; | |
2603 | if (cnt > 0 | |
2604 | && o != NULL | |
2605 | && o->state == COMP_OMP_STRUCTURED_BLOCK | |
2606 | && (o->head->op == EXEC_OMP_DO | |
2607 | || o->head->op == EXEC_OMP_PARALLEL_DO)) | |
2608 | { | |
2609 | int collapse = 1; | |
2610 | gcc_assert (o->head->next != NULL | |
2611 | && (o->head->next->op == EXEC_DO | |
2612 | || o->head->next->op == EXEC_DO_WHILE) | |
2613 | && o->previous != NULL | |
2614 | && o->previous->tail->op == o->head->op); | |
2615 | if (o->previous->tail->ext.omp_clauses != NULL | |
2616 | && o->previous->tail->ext.omp_clauses->collapse > 1) | |
2617 | collapse = o->previous->tail->ext.omp_clauses->collapse; | |
2618 | if (st == ST_EXIT && cnt <= collapse) | |
2619 | { | |
2620 | gfc_error ("EXIT statement at %C terminating !$OMP DO loop"); | |
2621 | return MATCH_ERROR; | |
2622 | } | |
2623 | if (st == ST_CYCLE && cnt < collapse) | |
2624 | { | |
2625 | gfc_error ("CYCLE statement at %C to non-innermost collapsed" | |
2626 | " !$OMP DO loop"); | |
2627 | return MATCH_ERROR; | |
2628 | } | |
2629 | } | |
2630 | ||
2631 | /* Save the first statement in the construct - needed by the backend. */ | |
2632 | new_st.ext.which_construct = p->construct; | |
2633 | ||
2634 | new_st.op = op; | |
2635 | ||
6de9cd9a DN |
2636 | return MATCH_YES; |
2637 | } | |
2638 | ||
2639 | ||
8c6a85e3 | 2640 | /* Match the EXIT statement. */ |
6de9cd9a DN |
2641 | |
2642 | match | |
8c6a85e3 | 2643 | gfc_match_exit (void) |
6de9cd9a | 2644 | { |
8c6a85e3 TB |
2645 | return match_exit_cycle (ST_EXIT, EXEC_EXIT); |
2646 | } | |
6de9cd9a | 2647 | |
6de9cd9a | 2648 | |
8c6a85e3 | 2649 | /* Match the CYCLE statement. */ |
6de9cd9a | 2650 | |
8c6a85e3 TB |
2651 | match |
2652 | gfc_match_cycle (void) | |
2653 | { | |
2654 | return match_exit_cycle (ST_CYCLE, EXEC_CYCLE); | |
6de9cd9a DN |
2655 | } |
2656 | ||
2657 | ||
8c6a85e3 | 2658 | /* Match a number or character constant after an (ALL) STOP or PAUSE statement. */ |
6de9cd9a | 2659 | |
8c6a85e3 TB |
2660 | static match |
2661 | gfc_match_stopcode (gfc_statement st) | |
6de9cd9a | 2662 | { |
8c6a85e3 | 2663 | gfc_expr *e; |
6de9cd9a DN |
2664 | match m; |
2665 | ||
8c6a85e3 TB |
2666 | e = NULL; |
2667 | ||
2668 | if (gfc_match_eos () != MATCH_YES) | |
6de9cd9a | 2669 | { |
8c6a85e3 TB |
2670 | m = gfc_match_init_expr (&e); |
2671 | if (m == MATCH_ERROR) | |
2672 | goto cleanup; | |
2673 | if (m == MATCH_NO) | |
2674 | goto syntax; | |
6de9cd9a | 2675 | |
8c6a85e3 TB |
2676 | if (gfc_match_eos () != MATCH_YES) |
2677 | goto syntax; | |
6de9cd9a DN |
2678 | } |
2679 | ||
8c6a85e3 | 2680 | if (gfc_pure (NULL)) |
6de9cd9a | 2681 | { |
8c6a85e3 TB |
2682 | gfc_error ("%s statement not allowed in PURE procedure at %C", |
2683 | gfc_ascii_statement (st)); | |
2684 | goto cleanup; | |
2685 | } | |
6de9cd9a | 2686 | |
8c6a85e3 TB |
2687 | if (gfc_implicit_pure (NULL)) |
2688 | gfc_current_ns->proc_name->attr.implicit_pure = 0; | |
6de9cd9a | 2689 | |
8c6a85e3 TB |
2690 | if (st == ST_STOP && gfc_find_state (COMP_CRITICAL) == SUCCESS) |
2691 | { | |
2692 | gfc_error ("Image control statement STOP at %C in CRITICAL block"); | |
2693 | goto cleanup; | |
2694 | } | |
2695 | if (st == ST_STOP && gfc_find_state (COMP_DO_CONCURRENT) == SUCCESS) | |
2696 | { | |
2697 | gfc_error ("Image control statement STOP at %C in DO CONCURRENT block"); | |
2698 | goto cleanup; | |
2699 | } | |
6de9cd9a | 2700 | |
8c6a85e3 TB |
2701 | if (e != NULL) |
2702 | { | |
2703 | if (!(e->ts.type == BT_CHARACTER || e->ts.type == BT_INTEGER)) | |
6de9cd9a | 2704 | { |
8c6a85e3 TB |
2705 | gfc_error ("STOP code at %L must be either INTEGER or CHARACTER type", |
2706 | &e->where); | |
2707 | goto cleanup; | |
6de9cd9a | 2708 | } |
6de9cd9a | 2709 | |
8c6a85e3 | 2710 | if (e->rank != 0) |
6de9cd9a | 2711 | { |
8c6a85e3 TB |
2712 | gfc_error ("STOP code at %L must be scalar", |
2713 | &e->where); | |
2714 | goto cleanup; | |
6de9cd9a | 2715 | } |
6de9cd9a | 2716 | |
8c6a85e3 TB |
2717 | if (e->ts.type == BT_CHARACTER |
2718 | && e->ts.kind != gfc_default_character_kind) | |
6de9cd9a | 2719 | { |
8c6a85e3 TB |
2720 | gfc_error ("STOP code at %L must be default character KIND=%d", |
2721 | &e->where, (int) gfc_default_character_kind); | |
2722 | goto cleanup; | |
6de9cd9a | 2723 | } |
6de9cd9a | 2724 | |
8c6a85e3 TB |
2725 | if (e->ts.type == BT_INTEGER |
2726 | && e->ts.kind != gfc_default_integer_kind) | |
2727 | { | |
2728 | gfc_error ("STOP code at %L must be default integer KIND=%d", | |
2729 | &e->where, (int) gfc_default_integer_kind); | |
2730 | goto cleanup; | |
2731 | } | |
6de9cd9a DN |
2732 | } |
2733 | ||
8c6a85e3 | 2734 | switch (st) |
6de9cd9a | 2735 | { |
8c6a85e3 TB |
2736 | case ST_STOP: |
2737 | new_st.op = EXEC_STOP; | |
2738 | break; | |
2739 | case ST_ERROR_STOP: | |
2740 | new_st.op = EXEC_ERROR_STOP; | |
2741 | break; | |
2742 | case ST_PAUSE: | |
2743 | new_st.op = EXEC_PAUSE; | |
2744 | break; | |
2745 | default: | |
2746 | gcc_unreachable (); | |
6de9cd9a DN |
2747 | } |
2748 | ||
8c6a85e3 TB |
2749 | new_st.expr1 = e; |
2750 | new_st.ext.stop_code = -1; | |
6de9cd9a | 2751 | |
6de9cd9a DN |
2752 | return MATCH_YES; |
2753 | ||
2754 | syntax: | |
8c6a85e3 TB |
2755 | gfc_syntax_error (st); |
2756 | ||
6de9cd9a | 2757 | cleanup: |
8c6a85e3 TB |
2758 | |
2759 | gfc_free_expr (e); | |
6de9cd9a DN |
2760 | return MATCH_ERROR; |
2761 | } | |
2762 | ||
2763 | ||
8c6a85e3 | 2764 | /* Match the (deprecated) PAUSE statement. */ |
6de9cd9a | 2765 | |
8c6a85e3 TB |
2766 | match |
2767 | gfc_match_pause (void) | |
6de9cd9a | 2768 | { |
8c6a85e3 | 2769 | match m; |
6de9cd9a | 2770 | |
8c6a85e3 TB |
2771 | m = gfc_match_stopcode (ST_PAUSE); |
2772 | if (m == MATCH_YES) | |
6de9cd9a | 2773 | { |
8c6a85e3 TB |
2774 | if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: PAUSE statement" |
2775 | " at %C") | |
2776 | == FAILURE) | |
2777 | m = MATCH_ERROR; | |
6de9cd9a | 2778 | } |
8c6a85e3 | 2779 | return m; |
6de9cd9a DN |
2780 | } |
2781 | ||
2782 | ||
8c6a85e3 | 2783 | /* Match the STOP statement. */ |
cf2b3c22 | 2784 | |
8c6a85e3 TB |
2785 | match |
2786 | gfc_match_stop (void) | |
cf2b3c22 | 2787 | { |
8c6a85e3 TB |
2788 | return gfc_match_stopcode (ST_STOP); |
2789 | } | |
cf2b3c22 | 2790 | |
1fccc6c3 | 2791 | |
8c6a85e3 | 2792 | /* Match the ERROR STOP statement. */ |
1fccc6c3 | 2793 | |
8c6a85e3 TB |
2794 | match |
2795 | gfc_match_error_stop (void) | |
2796 | { | |
2797 | if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: ERROR STOP statement at %C") | |
2798 | == FAILURE) | |
2799 | return MATCH_ERROR; | |
cf2b3c22 | 2800 | |
8c6a85e3 | 2801 | return gfc_match_stopcode (ST_ERROR_STOP); |
cf2b3c22 TB |
2802 | } |
2803 | ||
2804 | ||
8c6a85e3 TB |
2805 | /* Match LOCK/UNLOCK statement. Syntax: |
2806 | LOCK ( lock-variable [ , lock-stat-list ] ) | |
2807 | UNLOCK ( lock-variable [ , sync-stat-list ] ) | |
2808 | where lock-stat is ACQUIRED_LOCK or sync-stat | |
2809 | and sync-stat is STAT= or ERRMSG=. */ | |
8234e5e0 SK |
2810 | |
2811 | static match | |
8c6a85e3 | 2812 | lock_unlock_statement (gfc_statement st) |
8234e5e0 SK |
2813 | { |
2814 | match m; | |
8c6a85e3 TB |
2815 | gfc_expr *tmp, *lockvar, *acq_lock, *stat, *errmsg; |
2816 | bool saw_acq_lock, saw_stat, saw_errmsg; | |
8234e5e0 | 2817 | |
8c6a85e3 TB |
2818 | tmp = lockvar = acq_lock = stat = errmsg = NULL; |
2819 | saw_acq_lock = saw_stat = saw_errmsg = false; | |
8234e5e0 | 2820 | |
8c6a85e3 | 2821 | if (gfc_pure (NULL)) |
1107bd38 | 2822 | { |
8c6a85e3 TB |
2823 | gfc_error ("Image control statement %s at %C in PURE procedure", |
2824 | st == ST_LOCK ? "LOCK" : "UNLOCK"); | |
2825 | return MATCH_ERROR; | |
1107bd38 | 2826 | } |
1107bd38 | 2827 | |
8c6a85e3 TB |
2828 | if (gfc_implicit_pure (NULL)) |
2829 | gfc_current_ns->proc_name->attr.implicit_pure = 0; | |
2830 | ||
2831 | if (gfc_option.coarray == GFC_FCOARRAY_NONE) | |
8234e5e0 | 2832 | { |
8c6a85e3 TB |
2833 | gfc_fatal_error ("Coarrays disabled at %C, use -fcoarray= to enable"); |
2834 | return MATCH_ERROR; | |
8234e5e0 SK |
2835 | } |
2836 | ||
8c6a85e3 | 2837 | if (gfc_find_state (COMP_CRITICAL) == SUCCESS) |
8234e5e0 | 2838 | { |
8c6a85e3 TB |
2839 | gfc_error ("Image control statement %s at %C in CRITICAL block", |
2840 | st == ST_LOCK ? "LOCK" : "UNLOCK"); | |
2841 | return MATCH_ERROR; | |
8234e5e0 SK |
2842 | } |
2843 | ||
8c6a85e3 | 2844 | if (gfc_find_state (COMP_DO_CONCURRENT) == SUCCESS) |
8234e5e0 | 2845 | { |
8c6a85e3 TB |
2846 | gfc_error ("Image control statement %s at %C in DO CONCURRENT block", |
2847 | st == ST_LOCK ? "LOCK" : "UNLOCK"); | |
2848 | return MATCH_ERROR; | |
8234e5e0 SK |
2849 | } |
2850 | ||
8c6a85e3 TB |
2851 | if (gfc_match_char ('(') != MATCH_YES) |
2852 | goto syntax; | |
2853 | ||
2854 | if (gfc_match ("%e", &lockvar) != MATCH_YES) | |
2855 | goto syntax; | |
2856 | m = gfc_match_char (','); | |
2857 | if (m == MATCH_ERROR) | |
2858 | goto syntax; | |
2859 | if (m == MATCH_NO) | |
8234e5e0 | 2860 | { |
8c6a85e3 TB |
2861 | m = gfc_match_char (')'); |
2862 | if (m == MATCH_YES) | |
2863 | goto done; | |
2864 | goto syntax; | |
8234e5e0 SK |
2865 | } |
2866 | ||
8c6a85e3 | 2867 | for (;;) |
8234e5e0 | 2868 | { |
8c6a85e3 TB |
2869 | m = gfc_match (" stat = %v", &tmp); |
2870 | if (m == MATCH_ERROR) | |
2871 | goto syntax; | |
2872 | if (m == MATCH_YES) | |
2873 | { | |
2874 | if (saw_stat) | |
2875 | { | |
2876 | gfc_error ("Redundant STAT tag found at %L ", &tmp->where); | |
2877 | goto cleanup; | |
2878 | } | |
2879 | stat = tmp; | |
2880 | saw_stat = true; | |
1fccc6c3 | 2881 | |
8c6a85e3 TB |
2882 | m = gfc_match_char (','); |
2883 | if (m == MATCH_YES) | |
2884 | continue; | |
1fccc6c3 | 2885 | |
8c6a85e3 TB |
2886 | tmp = NULL; |
2887 | break; | |
2888 | } | |
1fccc6c3 | 2889 | |
8c6a85e3 TB |
2890 | m = gfc_match (" errmsg = %v", &tmp); |
2891 | if (m == MATCH_ERROR) | |
2892 | goto syntax; | |
2893 | if (m == MATCH_YES) | |
2894 | { | |
2895 | if (saw_errmsg) | |
2896 | { | |
2897 | gfc_error ("Redundant ERRMSG tag found at %L ", &tmp->where); | |
2898 | goto cleanup; | |
2899 | } | |
2900 | errmsg = tmp; | |
2901 | saw_errmsg = true; | |
8234e5e0 | 2902 | |
8c6a85e3 TB |
2903 | m = gfc_match_char (','); |
2904 | if (m == MATCH_YES) | |
2905 | continue; | |
8234e5e0 | 2906 | |
8c6a85e3 TB |
2907 | tmp = NULL; |
2908 | break; | |
2909 | } | |
8234e5e0 | 2910 | |
8c6a85e3 TB |
2911 | m = gfc_match (" acquired_lock = %v", &tmp); |
2912 | if (m == MATCH_ERROR || st == ST_UNLOCK) | |
2913 | goto syntax; | |
2914 | if (m == MATCH_YES) | |
2915 | { | |
2916 | if (saw_acq_lock) | |
2917 | { | |
2918 | gfc_error ("Redundant ACQUIRED_LOCK tag found at %L ", | |
2919 | &tmp->where); | |
2920 | goto cleanup; | |
2921 | } | |
2922 | acq_lock = tmp; | |
2923 | saw_acq_lock = true; | |
8234e5e0 | 2924 | |
8c6a85e3 TB |
2925 | m = gfc_match_char (','); |
2926 | if (m == MATCH_YES) | |
2927 | continue; | |
2928 | ||
2929 | tmp = NULL; | |
2930 | break; | |
2931 | } | |
2932 | ||
2933 | break; | |
2934 | } | |
2935 | ||
2936 | if (m == MATCH_ERROR) | |
2937 | goto syntax; | |
2938 | ||
2939 | if (gfc_match (" )%t") != MATCH_YES) | |
2940 | goto syntax; | |
2941 | ||
2942 | done: | |
2943 | switch (st) | |
8234e5e0 | 2944 | { |
8c6a85e3 TB |
2945 | case ST_LOCK: |
2946 | new_st.op = EXEC_LOCK; | |
2947 | break; | |
2948 | case ST_UNLOCK: | |
2949 | new_st.op = EXEC_UNLOCK; | |
2950 | break; | |
2951 | default: | |
2952 | gcc_unreachable (); | |
8234e5e0 SK |
2953 | } |
2954 | ||
8c6a85e3 TB |
2955 | new_st.expr1 = lockvar; |
2956 | new_st.expr2 = stat; | |
2957 | new_st.expr3 = errmsg; | |
2958 | new_st.expr4 = acq_lock; | |
8234e5e0 | 2959 | |
8c6a85e3 | 2960 | return MATCH_YES; |
8234e5e0 | 2961 | |
8c6a85e3 TB |
2962 | syntax: |
2963 | gfc_syntax_error (st); | |
2964 | ||
2965 | cleanup: | |
2966 | gfc_free_expr (tmp); | |
2967 | gfc_free_expr (lockvar); | |
2968 | gfc_free_expr (acq_lock); | |
2969 | gfc_free_expr (stat); | |
2970 | gfc_free_expr (errmsg); | |
2971 | ||
2972 | return MATCH_ERROR; | |
8234e5e0 SK |
2973 | } |
2974 | ||
2975 | ||
8c6a85e3 TB |
2976 | match |
2977 | gfc_match_lock (void) | |
2978 | { | |
2979 | if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: LOCK statement at %C") | |
2980 | == FAILURE) | |
2981 | return MATCH_ERROR; | |
2982 | ||
2983 | return lock_unlock_statement (ST_LOCK); | |
2984 | } | |
2985 | ||
6de9cd9a DN |
2986 | |
2987 | match | |
8c6a85e3 | 2988 | gfc_match_unlock (void) |
6de9cd9a | 2989 | { |
8c6a85e3 TB |
2990 | if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: UNLOCK statement at %C") |
2991 | == FAILURE) | |
2992 | return MATCH_ERROR; | |
6de9cd9a | 2993 | |
8c6a85e3 TB |
2994 | return lock_unlock_statement (ST_UNLOCK); |
2995 | } | |
6de9cd9a | 2996 | |
6de9cd9a | 2997 | |
8c6a85e3 TB |
2998 | /* Match SYNC ALL/IMAGES/MEMORY statement. Syntax: |
2999 | SYNC ALL [(sync-stat-list)] | |
3000 | SYNC MEMORY [(sync-stat-list)] | |
3001 | SYNC IMAGES (image-set [, sync-stat-list] ) | |
3002 | with sync-stat is int-expr or *. */ | |
1fccc6c3 | 3003 | |
8c6a85e3 TB |
3004 | static match |
3005 | sync_statement (gfc_statement st) | |
3006 | { | |
3007 | match m; | |
3008 | gfc_expr *tmp, *imageset, *stat, *errmsg; | |
3009 | bool saw_stat, saw_errmsg; | |
1fccc6c3 | 3010 | |
8c6a85e3 TB |
3011 | tmp = imageset = stat = errmsg = NULL; |
3012 | saw_stat = saw_errmsg = false; | |
3013 | ||
3014 | if (gfc_pure (NULL)) | |
3015 | { | |
3016 | gfc_error ("Image control statement SYNC at %C in PURE procedure"); | |
3017 | return MATCH_ERROR; | |
1fccc6c3 | 3018 | } |
8c6a85e3 TB |
3019 | |
3020 | if (gfc_implicit_pure (NULL)) | |
3021 | gfc_current_ns->proc_name->attr.implicit_pure = 0; | |
3022 | ||
3023 | if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: SYNC statement at %C") | |
3024 | == FAILURE) | |
3025 | return MATCH_ERROR; | |
3026 | ||
3027 | if (gfc_option.coarray == GFC_FCOARRAY_NONE) | |
8234e5e0 | 3028 | { |
8c6a85e3 TB |
3029 | gfc_fatal_error ("Coarrays disabled at %C, use -fcoarray= to enable"); |
3030 | return MATCH_ERROR; | |
3031 | } | |
e69afb29 | 3032 | |
8c6a85e3 TB |
3033 | if (gfc_find_state (COMP_CRITICAL) == SUCCESS) |
3034 | { | |
3035 | gfc_error ("Image control statement SYNC at %C in CRITICAL block"); | |
3036 | return MATCH_ERROR; | |
8234e5e0 SK |
3037 | } |
3038 | ||
8c6a85e3 | 3039 | if (gfc_find_state (COMP_DO_CONCURRENT) == SUCCESS) |
6de9cd9a | 3040 | { |
8c6a85e3 TB |
3041 | gfc_error ("Image control statement SYNC at %C in DO CONCURRENT block"); |
3042 | return MATCH_ERROR; | |
3043 | } | |
6de9cd9a | 3044 | |
8c6a85e3 TB |
3045 | if (gfc_match_eos () == MATCH_YES) |
3046 | { | |
3047 | if (st == ST_SYNC_IMAGES) | |
6de9cd9a | 3048 | goto syntax; |
8c6a85e3 TB |
3049 | goto done; |
3050 | } | |
6de9cd9a | 3051 | |
8c6a85e3 TB |
3052 | if (gfc_match_char ('(') != MATCH_YES) |
3053 | goto syntax; | |
c9583ed2 | 3054 | |
8c6a85e3 TB |
3055 | if (st == ST_SYNC_IMAGES) |
3056 | { | |
3057 | /* Denote '*' as imageset == NULL. */ | |
3058 | m = gfc_match_char ('*'); | |
3059 | if (m == MATCH_ERROR) | |
3060 | goto syntax; | |
3061 | if (m == MATCH_NO) | |
6de9cd9a | 3062 | { |
8c6a85e3 TB |
3063 | if (gfc_match ("%e", &imageset) != MATCH_YES) |
3064 | goto syntax; | |
6de9cd9a | 3065 | } |
8c6a85e3 TB |
3066 | m = gfc_match_char (','); |
3067 | if (m == MATCH_ERROR) | |
3068 | goto syntax; | |
3069 | if (m == MATCH_NO) | |
e69afb29 | 3070 | { |
8c6a85e3 TB |
3071 | m = gfc_match_char (')'); |
3072 | if (m == MATCH_YES) | |
3073 | goto done; | |
3074 | goto syntax; | |
e69afb29 | 3075 | } |
8c6a85e3 | 3076 | } |
e69afb29 | 3077 | |
8c6a85e3 TB |
3078 | for (;;) |
3079 | { | |
3080 | m = gfc_match (" stat = %v", &tmp); | |
3081 | if (m == MATCH_ERROR) | |
3082 | goto syntax; | |
3083 | if (m == MATCH_YES) | |
8234e5e0 | 3084 | { |
8c6a85e3 | 3085 | if (saw_stat) |
8234e5e0 | 3086 | { |
8c6a85e3 | 3087 | gfc_error ("Redundant STAT tag found at %L ", &tmp->where); |
8234e5e0 SK |
3088 | goto cleanup; |
3089 | } | |
8c6a85e3 TB |
3090 | stat = tmp; |
3091 | saw_stat = true; | |
8234e5e0 | 3092 | |
8c6a85e3 TB |
3093 | if (gfc_match_char (',') == MATCH_YES) |
3094 | continue; | |
3095 | ||
3096 | tmp = NULL; | |
3097 | break; | |
3098 | } | |
3099 | ||
3100 | m = gfc_match (" errmsg = %v", &tmp); | |
3101 | if (m == MATCH_ERROR) | |
3102 | goto syntax; | |
3103 | if (m == MATCH_YES) | |
3104 | { | |
3105 | if (saw_errmsg) | |
8234e5e0 | 3106 | { |
8c6a85e3 | 3107 | gfc_error ("Redundant ERRMSG tag found at %L ", &tmp->where); |
8234e5e0 SK |
3108 | goto cleanup; |
3109 | } | |
8c6a85e3 TB |
3110 | errmsg = tmp; |
3111 | saw_errmsg = true; | |
8234e5e0 | 3112 | |
8c6a85e3 TB |
3113 | if (gfc_match_char (',') == MATCH_YES) |
3114 | continue; | |
3e978d30 | 3115 | |
8c6a85e3 TB |
3116 | tmp = NULL; |
3117 | break; | |
d59b1dcb DF |
3118 | } |
3119 | ||
6de9cd9a | 3120 | break; |
8c6a85e3 | 3121 | } |
6de9cd9a | 3122 | |
8c6a85e3 TB |
3123 | if (m == MATCH_ERROR) |
3124 | goto syntax; | |
3759634f | 3125 | |
8c6a85e3 TB |
3126 | if (gfc_match (" )%t") != MATCH_YES) |
3127 | goto syntax; | |
3759634f | 3128 | |
8c6a85e3 TB |
3129 | done: |
3130 | switch (st) | |
3131 | { | |
3132 | case ST_SYNC_ALL: | |
3133 | new_st.op = EXEC_SYNC_ALL; | |
3134 | break; | |
3135 | case ST_SYNC_IMAGES: | |
3136 | new_st.op = EXEC_SYNC_IMAGES; | |
3137 | break; | |
3138 | case ST_SYNC_MEMORY: | |
3139 | new_st.op = EXEC_SYNC_MEMORY; | |
3140 | break; | |
3141 | default: | |
3142 | gcc_unreachable (); | |
3143 | } | |
3759634f | 3144 | |
8c6a85e3 TB |
3145 | new_st.expr1 = imageset; |
3146 | new_st.expr2 = stat; | |
3147 | new_st.expr3 = errmsg; | |
3759634f | 3148 | |
8c6a85e3 | 3149 | return MATCH_YES; |
3759634f | 3150 | |
8c6a85e3 TB |
3151 | syntax: |
3152 | gfc_syntax_error (st); | |
8234e5e0 | 3153 | |
8c6a85e3 TB |
3154 | cleanup: |
3155 | gfc_free_expr (tmp); | |
3156 | gfc_free_expr (imageset); | |
3157 | gfc_free_expr (stat); | |
3158 | gfc_free_expr (errmsg); | |
8234e5e0 | 3159 | |
8c6a85e3 TB |
3160 | return MATCH_ERROR; |
3161 | } | |
8234e5e0 | 3162 | |
8234e5e0 | 3163 | |
8c6a85e3 | 3164 | /* Match SYNC ALL statement. */ |
8234e5e0 | 3165 | |
8c6a85e3 TB |
3166 | match |
3167 | gfc_match_sync_all (void) | |
3168 | { | |
3169 | return sync_statement (ST_SYNC_ALL); | |
3170 | } | |
8234e5e0 | 3171 | |
94bff632 | 3172 | |
8c6a85e3 | 3173 | /* Match SYNC IMAGES statement. */ |
94bff632 | 3174 | |
8c6a85e3 TB |
3175 | match |
3176 | gfc_match_sync_images (void) | |
3177 | { | |
3178 | return sync_statement (ST_SYNC_IMAGES); | |
3179 | } | |
94bff632 | 3180 | |
94bff632 | 3181 | |
8c6a85e3 | 3182 | /* Match SYNC MEMORY statement. */ |
3759634f | 3183 | |
8c6a85e3 TB |
3184 | match |
3185 | gfc_match_sync_memory (void) | |
3186 | { | |
3187 | return sync_statement (ST_SYNC_MEMORY); | |
3188 | } | |
6de9cd9a | 3189 | |
6de9cd9a | 3190 | |
8c6a85e3 | 3191 | /* Match a CONTINUE statement. */ |
e69afb29 | 3192 | |
8c6a85e3 TB |
3193 | match |
3194 | gfc_match_continue (void) | |
3195 | { | |
3196 | if (gfc_match_eos () != MATCH_YES) | |
e69afb29 | 3197 | { |
8c6a85e3 TB |
3198 | gfc_syntax_error (ST_CONTINUE); |
3199 | return MATCH_ERROR; | |
e69afb29 | 3200 | } |
6de9cd9a | 3201 | |
8c6a85e3 | 3202 | new_st.op = EXEC_CONTINUE; |
6de9cd9a | 3203 | return MATCH_YES; |
6de9cd9a DN |
3204 | } |
3205 | ||
3206 | ||
8c6a85e3 | 3207 | /* Match the (deprecated) ASSIGN statement. */ |
6de9cd9a DN |
3208 | |
3209 | match | |
8c6a85e3 | 3210 | gfc_match_assign (void) |
6de9cd9a | 3211 | { |
8c6a85e3 TB |
3212 | gfc_expr *expr; |
3213 | gfc_st_label *label; | |
6de9cd9a | 3214 | |
8c6a85e3 | 3215 | if (gfc_match (" %l", &label) == MATCH_YES) |
6de9cd9a | 3216 | { |
8c6a85e3 TB |
3217 | if (gfc_reference_st_label (label, ST_LABEL_UNKNOWN) == FAILURE) |
3218 | return MATCH_ERROR; | |
3219 | if (gfc_match (" to %v%t", &expr) == MATCH_YES) | |
5aacb11e | 3220 | { |
8c6a85e3 TB |
3221 | if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: ASSIGN " |
3222 | "statement at %C") | |
3223 | == FAILURE) | |
3224 | return MATCH_ERROR; | |
5aacb11e | 3225 | |
8c6a85e3 | 3226 | expr->symtree->n.sym->attr.assign = 1; |
6de9cd9a | 3227 | |
8c6a85e3 TB |
3228 | new_st.op = EXEC_LABEL_ASSIGN; |
3229 | new_st.label1 = label; | |
3230 | new_st.expr1 = expr; | |
3231 | return MATCH_YES; | |
6de9cd9a | 3232 | } |
6de9cd9a | 3233 | } |
8c6a85e3 | 3234 | return MATCH_NO; |
6de9cd9a DN |
3235 | } |
3236 | ||
3237 | ||
8c6a85e3 TB |
3238 | /* Match the GO TO statement. As a computed GOTO statement is |
3239 | matched, it is transformed into an equivalent SELECT block. No | |
3240 | tree is necessary, and the resulting jumps-to-jumps are | |
3241 | specifically optimized away by the back end. */ | |
6de9cd9a DN |
3242 | |
3243 | match | |
8c6a85e3 | 3244 | gfc_match_goto (void) |
6de9cd9a | 3245 | { |
8c6a85e3 TB |
3246 | gfc_code *head, *tail; |
3247 | gfc_expr *expr; | |
3248 | gfc_case *cp; | |
3249 | gfc_st_label *label; | |
3250 | int i; | |
6de9cd9a | 3251 | match m; |
6de9cd9a | 3252 | |
8c6a85e3 | 3253 | if (gfc_match (" %l%t", &label) == MATCH_YES) |
6de9cd9a | 3254 | { |
8c6a85e3 TB |
3255 | if (gfc_reference_st_label (label, ST_LABEL_TARGET) == FAILURE) |
3256 | return MATCH_ERROR; | |
6de9cd9a | 3257 | |
8c6a85e3 TB |
3258 | new_st.op = EXEC_GOTO; |
3259 | new_st.label1 = label; | |
3260 | return MATCH_YES; | |
3261 | } | |
6de9cd9a | 3262 | |
8c6a85e3 | 3263 | /* The assigned GO TO statement. */ |
c9583ed2 | 3264 | |
8c6a85e3 TB |
3265 | if (gfc_match_variable (&expr, 0) == MATCH_YES) |
3266 | { | |
3267 | if (gfc_notify_std (GFC_STD_F95_DEL, "Deleted feature: Assigned GOTO " | |
3268 | "statement at %C") | |
3269 | == FAILURE) | |
3270 | return MATCH_ERROR; | |
cf2b3c22 | 3271 | |
8c6a85e3 TB |
3272 | new_st.op = EXEC_GOTO; |
3273 | new_st.expr1 = expr; | |
3759634f | 3274 | |
8c6a85e3 TB |
3275 | if (gfc_match_eos () == MATCH_YES) |
3276 | return MATCH_YES; | |
f1f39033 | 3277 | |
8c6a85e3 TB |
3278 | /* Match label list. */ |
3279 | gfc_match_char (','); | |
3280 | if (gfc_match_char ('(') != MATCH_YES) | |
3759634f | 3281 | { |
8c6a85e3 TB |
3282 | gfc_syntax_error (ST_GOTO); |
3283 | return MATCH_ERROR; | |
6de9cd9a | 3284 | } |
8c6a85e3 | 3285 | head = tail = NULL; |
6de9cd9a | 3286 | |
8c6a85e3 TB |
3287 | do |
3288 | { | |
3289 | m = gfc_match_st_label (&label); | |
3290 | if (m != MATCH_YES) | |
3291 | goto syntax; | |
6de9cd9a | 3292 | |
8c6a85e3 TB |
3293 | if (gfc_reference_st_label (label, ST_LABEL_TARGET) == FAILURE) |
3294 | goto cleanup; | |
3759634f | 3295 | |
8c6a85e3 TB |
3296 | if (head == NULL) |
3297 | head = tail = gfc_get_code (); | |
3298 | else | |
3759634f | 3299 | { |
8c6a85e3 TB |
3300 | tail->block = gfc_get_code (); |
3301 | tail = tail->block; | |
3759634f SK |
3302 | } |
3303 | ||
8c6a85e3 TB |
3304 | tail->label1 = label; |
3305 | tail->op = EXEC_GOTO; | |
3306 | } | |
3307 | while (gfc_match_char (',') == MATCH_YES); | |
3759634f | 3308 | |
8c6a85e3 TB |
3309 | if (gfc_match (")%t") != MATCH_YES) |
3310 | goto syntax; | |
6de9cd9a | 3311 | |
8c6a85e3 TB |
3312 | if (head == NULL) |
3313 | { | |
3314 | gfc_error ("Statement label list in GOTO at %C cannot be empty"); | |
3315 | goto syntax; | |
3759634f | 3316 | } |
8c6a85e3 | 3317 | new_st.block = head; |
3759634f | 3318 | |
8c6a85e3 TB |
3319 | return MATCH_YES; |
3320 | } | |
3759634f | 3321 | |
8c6a85e3 TB |
3322 | /* Last chance is a computed GO TO statement. */ |
3323 | if (gfc_match_char ('(') != MATCH_YES) | |
3324 | { | |
3325 | gfc_syntax_error (ST_GOTO); | |
3326 | return MATCH_ERROR; | |
3327 | } | |
3759634f | 3328 | |
8c6a85e3 TB |
3329 | head = tail = NULL; |
3330 | i = 1; | |
3759634f | 3331 | |
8c6a85e3 TB |
3332 | do |
3333 | { | |
3334 | m = gfc_match_st_label (&label); | |
3335 | if (m != MATCH_YES) | |
3336 | goto syntax; | |
3337 | ||
3338 | if (gfc_reference_st_label (label, ST_LABEL_TARGET) == FAILURE) | |
3339 | goto cleanup; | |
3340 | ||
3341 | if (head == NULL) | |
3342 | head = tail = gfc_get_code (); | |
3343 | else | |
3344 | { | |
3345 | tail->block = gfc_get_code (); | |
3346 | tail = tail->block; | |
3759634f SK |
3347 | } |
3348 | ||
8c6a85e3 TB |
3349 | cp = gfc_get_case (); |
3350 | cp->low = cp->high = gfc_get_int_expr (gfc_default_integer_kind, | |
3351 | NULL, i++); | |
3759634f | 3352 | |
8c6a85e3 TB |
3353 | tail->op = EXEC_SELECT; |
3354 | tail->ext.block.case_list = cp; | |
3355 | ||
3356 | tail->next = gfc_get_code (); | |
3357 | tail->next->op = EXEC_GOTO; | |
3358 | tail->next->label1 = label; | |
3759634f | 3359 | } |
8c6a85e3 | 3360 | while (gfc_match_char (',') == MATCH_YES); |
6de9cd9a | 3361 | |
8c6a85e3 | 3362 | if (gfc_match_char (')') != MATCH_YES) |
6de9cd9a DN |
3363 | goto syntax; |
3364 | ||
8c6a85e3 TB |
3365 | if (head == NULL) |
3366 | { | |
3367 | gfc_error ("Statement label list in GOTO at %C cannot be empty"); | |
3368 | goto syntax; | |
3369 | } | |
6de9cd9a | 3370 | |
8c6a85e3 TB |
3371 | /* Get the rest of the statement. */ |
3372 | gfc_match_char (','); | |
6de9cd9a | 3373 | |
8c6a85e3 TB |
3374 | if (gfc_match (" %e%t", &expr) != MATCH_YES) |
3375 | goto syntax; | |
6de9cd9a | 3376 | |
8c6a85e3 | 3377 | if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: Computed GOTO " |
e2ab8b09 JW |
3378 | "at %C") == FAILURE) |
3379 | return MATCH_ERROR; | |
3380 | ||
8c6a85e3 TB |
3381 | /* At this point, a computed GOTO has been fully matched and an |
3382 | equivalent SELECT statement constructed. */ | |
7f42f27f | 3383 | |
8c6a85e3 TB |
3384 | new_st.op = EXEC_SELECT; |
3385 | new_st.expr1 = NULL; | |
6de9cd9a | 3386 | |
8c6a85e3 TB |
3387 | /* Hack: For a "real" SELECT, the expression is in expr. We put |
3388 | it in expr2 so we can distinguish then and produce the correct | |
3389 | diagnostics. */ | |
3390 | new_st.expr2 = expr; | |
3391 | new_st.block = head; | |
3392 | return MATCH_YES; | |
6de9cd9a | 3393 | |
8c6a85e3 TB |
3394 | syntax: |
3395 | gfc_syntax_error (ST_GOTO); | |
6de9cd9a | 3396 | cleanup: |
8c6a85e3 | 3397 | gfc_free_statements (head); |
6de9cd9a | 3398 | return MATCH_ERROR; |
6de9cd9a DN |
3399 | } |
3400 | ||
3401 | ||
8c6a85e3 | 3402 | /* Frees a list of gfc_alloc structures. */ |
8e1f752a | 3403 | |
8c6a85e3 TB |
3404 | void |
3405 | gfc_free_alloc_list (gfc_alloc *p) | |
8e1f752a | 3406 | { |
8c6a85e3 | 3407 | gfc_alloc *q; |
8e1f752a | 3408 | |
8c6a85e3 | 3409 | for (; p; p = q) |
8e1f752a | 3410 | { |
8c6a85e3 TB |
3411 | q = p->next; |
3412 | gfc_free_expr (p->expr); | |
3413 | free (p); | |
8e1f752a | 3414 | } |
8e1f752a DK |
3415 | } |
3416 | ||
3417 | ||
8c6a85e3 | 3418 | /* Match an ALLOCATE statement. */ |
6de9cd9a DN |
3419 | |
3420 | match | |
8c6a85e3 | 3421 | gfc_match_allocate (void) |
6de9cd9a | 3422 | { |
8c6a85e3 TB |
3423 | gfc_alloc *head, *tail; |
3424 | gfc_expr *stat, *errmsg, *tmp, *source, *mold; | |
3425 | gfc_typespec ts; | |
6de9cd9a | 3426 | gfc_symbol *sym; |
6de9cd9a | 3427 | match m; |
8c6a85e3 TB |
3428 | locus old_locus, deferred_locus; |
3429 | bool saw_stat, saw_errmsg, saw_source, saw_mold, saw_deferred, b1, b2, b3; | |
6de9cd9a | 3430 | |
8c6a85e3 TB |
3431 | head = tail = NULL; |
3432 | stat = errmsg = source = mold = tmp = NULL; | |
3433 | saw_stat = saw_errmsg = saw_source = saw_mold = saw_deferred = false; | |
6de9cd9a | 3434 | |
8c6a85e3 | 3435 | if (gfc_match_char ('(') != MATCH_YES) |
6de9cd9a | 3436 | goto syntax; |
6de9cd9a | 3437 | |
8c6a85e3 TB |
3438 | /* Match an optional type-spec. */ |
3439 | old_locus = gfc_current_locus; | |
3440 | m = match_type_spec (&ts); | |
3441 | if (m == MATCH_ERROR) | |
3442 | goto cleanup; | |
3443 | else if (m == MATCH_NO) | |
3444 | { | |
3445 | char name[GFC_MAX_SYMBOL_LEN + 3]; | |
6de9cd9a | 3446 | |
8c6a85e3 TB |
3447 | if (gfc_match ("%n :: ", name) == MATCH_YES) |
3448 | { | |
3449 | gfc_error ("Error in type-spec at %L", &old_locus); | |
3450 | goto cleanup; | |
3451 | } | |
8e1f752a | 3452 | |
8c6a85e3 TB |
3453 | ts.type = BT_UNKNOWN; |
3454 | } | |
3455 | else | |
6291f3ba | 3456 | { |
8c6a85e3 | 3457 | if (gfc_match (" :: ") == MATCH_YES) |
eda0ed25 | 3458 | { |
8c6a85e3 TB |
3459 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: typespec in " |
3460 | "ALLOCATE at %L", &old_locus) == FAILURE) | |
3461 | goto cleanup; | |
6de9cd9a | 3462 | |
8c6a85e3 TB |
3463 | if (ts.deferred) |
3464 | { | |
3465 | gfc_error ("Type-spec at %L cannot contain a deferred " | |
3466 | "type parameter", &old_locus); | |
3467 | goto cleanup; | |
3468 | } | |
3469 | } | |
3470 | else | |
3471 | { | |
3472 | ts.type = BT_UNKNOWN; | |
3473 | gfc_current_locus = old_locus; | |
eda0ed25 | 3474 | } |
6291f3ba | 3475 | } |
8de10a62 | 3476 | |
8c6a85e3 | 3477 | for (;;) |
6de9cd9a | 3478 | { |
8c6a85e3 TB |
3479 | if (head == NULL) |
3480 | head = tail = gfc_get_alloc (); | |
3481 | else | |
3482 | { | |
3483 | tail->next = gfc_get_alloc (); | |
3484 | tail = tail->next; | |
3485 | } | |
3486 | ||
3487 | m = gfc_match_variable (&tail->expr, 0); | |
6de9cd9a DN |
3488 | if (m == MATCH_NO) |
3489 | goto syntax; | |
3490 | if (m == MATCH_ERROR) | |
3491 | goto cleanup; | |
3492 | ||
8c6a85e3 TB |
3493 | if (gfc_check_do_variable (tail->expr->symtree)) |
3494 | goto cleanup; | |
6de9cd9a | 3495 | |
8c6a85e3 TB |
3496 | if (gfc_pure (NULL) && gfc_impure_variable (tail->expr->symtree->n.sym)) |
3497 | { | |
3498 | gfc_error ("Bad allocate-object at %C for a PURE procedure"); | |
3499 | goto cleanup; | |
3500 | } | |
6de9cd9a | 3501 | |
8c6a85e3 TB |
3502 | if (gfc_implicit_pure (NULL) |
3503 | && gfc_impure_variable (tail->expr->symtree->n.sym)) | |
3504 | gfc_current_ns->proc_name->attr.implicit_pure = 0; | |
6de9cd9a | 3505 | |
8c6a85e3 TB |
3506 | if (tail->expr->ts.deferred) |
3507 | { | |
3508 | saw_deferred = true; | |
3509 | deferred_locus = tail->expr->where; | |
3510 | } | |
6de9cd9a | 3511 | |
8c6a85e3 TB |
3512 | if (gfc_find_state (COMP_DO_CONCURRENT) == SUCCESS |
3513 | || gfc_find_state (COMP_CRITICAL) == SUCCESS) | |
3514 | { | |
3515 | gfc_ref *ref; | |
3516 | bool coarray = tail->expr->symtree->n.sym->attr.codimension; | |
3517 | for (ref = tail->expr->ref; ref; ref = ref->next) | |
3518 | if (ref->type == REF_COMPONENT) | |
3519 | coarray = ref->u.c.component->attr.codimension; | |
6de9cd9a | 3520 | |
8c6a85e3 TB |
3521 | if (coarray && gfc_find_state (COMP_DO_CONCURRENT) == SUCCESS) |
3522 | { | |
3523 | gfc_error ("ALLOCATE of coarray at %C in DO CONCURRENT block"); | |
3524 | goto cleanup; | |
3525 | } | |
3526 | if (coarray && gfc_find_state (COMP_CRITICAL) == SUCCESS) | |
3527 | { | |
3528 | gfc_error ("ALLOCATE of coarray at %C in CRITICAL block"); | |
3529 | goto cleanup; | |
3530 | } | |
3531 | } | |
6de9cd9a | 3532 | |
8c6a85e3 TB |
3533 | /* The ALLOCATE statement had an optional typespec. Check the |
3534 | constraints. */ | |
3535 | if (ts.type != BT_UNKNOWN) | |
6de9cd9a | 3536 | { |
8c6a85e3 TB |
3537 | /* Enforce F03:C624. */ |
3538 | if (!gfc_type_compatible (&tail->expr->ts, &ts)) | |
3539 | { | |
3540 | gfc_error ("Type of entity at %L is type incompatible with " | |
3541 | "typespec", &tail->expr->where); | |
3542 | goto cleanup; | |
3543 | } | |
6de9cd9a | 3544 | |
8c6a85e3 TB |
3545 | /* Enforce F03:C627. */ |
3546 | if (ts.kind != tail->expr->ts.kind) | |
3547 | { | |
3548 | gfc_error ("Kind type parameter for entity at %L differs from " | |
3549 | "the kind type parameter of the typespec", | |
3550 | &tail->expr->where); | |
3551 | goto cleanup; | |
3552 | } | |
3553 | } | |
6de9cd9a | 3554 | |
8c6a85e3 TB |
3555 | if (tail->expr->ts.type == BT_DERIVED) |
3556 | tail->expr->ts.u.derived = gfc_use_derived (tail->expr->ts.u.derived); | |
6de9cd9a | 3557 | |
8c6a85e3 TB |
3558 | /* FIXME: disable the checking on derived types and arrays. */ |
3559 | sym = tail->expr->symtree->n.sym; | |
3560 | b1 = !(tail->expr->ref | |
3561 | && (tail->expr->ref->type == REF_COMPONENT | |
3562 | || tail->expr->ref->type == REF_ARRAY)); | |
3563 | if (sym && sym->ts.type == BT_CLASS && sym->attr.class_ok) | |
3564 | b2 = !(CLASS_DATA (sym)->attr.allocatable | |
3565 | || CLASS_DATA (sym)->attr.class_pointer); | |
3566 | else | |
3567 | b2 = sym && !(sym->attr.allocatable || sym->attr.pointer | |
3568 | || sym->attr.proc_pointer); | |
3569 | b3 = sym && sym->ns && sym->ns->proc_name | |
3570 | && (sym->ns->proc_name->attr.allocatable | |
3571 | || sym->ns->proc_name->attr.pointer | |
3572 | || sym->ns->proc_name->attr.proc_pointer); | |
3573 | if (b1 && b2 && !b3) | |
3574 | { | |
b59e9071 PT |
3575 | gfc_error ("Allocate-object at %L is neither a nonprocedure pointer " |
3576 | "nor an allocatable variable", &tail->expr->where); | |
8c6a85e3 TB |
3577 | goto cleanup; |
3578 | } | |
6de9cd9a | 3579 | |
8c6a85e3 TB |
3580 | if (gfc_peek_ascii_char () == '(' && !sym->attr.dimension) |
3581 | { | |
3582 | gfc_error ("Shape specification for allocatable scalar at %C"); | |
3583 | goto cleanup; | |
3584 | } | |
6de9cd9a | 3585 | |
8c6a85e3 TB |
3586 | if (gfc_match_char (',') != MATCH_YES) |
3587 | break; | |
3588 | ||
3589 | alloc_opt_list: | |
3590 | ||
3591 | m = gfc_match (" stat = %v", &tmp); | |
3592 | if (m == MATCH_ERROR) | |
3593 | goto cleanup; | |
3594 | if (m == MATCH_YES) | |
3595 | { | |
3596 | /* Enforce C630. */ | |
3597 | if (saw_stat) | |
3598 | { | |
3599 | gfc_error ("Redundant STAT tag found at %L ", &tmp->where); | |
3600 | goto cleanup; | |
3601 | } | |
3602 | ||
3603 | stat = tmp; | |
3604 | tmp = NULL; | |
3605 | saw_stat = true; | |
3606 | ||
3607 | if (gfc_check_do_variable (stat->symtree)) | |
3608 | goto cleanup; | |
3609 | ||
3610 | if (gfc_match_char (',') == MATCH_YES) | |
3611 | goto alloc_opt_list; | |
3612 | } | |
3613 | ||
3614 | m = gfc_match (" errmsg = %v", &tmp); | |
3615 | if (m == MATCH_ERROR) | |
3616 | goto cleanup; | |
3617 | if (m == MATCH_YES) | |
3618 | { | |
3619 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ERRMSG tag at %L", | |
3620 | &tmp->where) == FAILURE) | |
3621 | goto cleanup; | |
3622 | ||
3623 | /* Enforce C630. */ | |
3624 | if (saw_errmsg) | |
3625 | { | |
3626 | gfc_error ("Redundant ERRMSG tag found at %L ", &tmp->where); | |
3627 | goto cleanup; | |
3628 | } | |
3629 | ||
3630 | errmsg = tmp; | |
3631 | tmp = NULL; | |
3632 | saw_errmsg = true; | |
3633 | ||
3634 | if (gfc_match_char (',') == MATCH_YES) | |
3635 | goto alloc_opt_list; | |
3636 | } | |
3637 | ||
3638 | m = gfc_match (" source = %e", &tmp); | |
3639 | if (m == MATCH_ERROR) | |
3640 | goto cleanup; | |
3641 | if (m == MATCH_YES) | |
3642 | { | |
3643 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: SOURCE tag at %L", | |
3644 | &tmp->where) == FAILURE) | |
3645 | goto cleanup; | |
3646 | ||
3647 | /* Enforce C630. */ | |
3648 | if (saw_source) | |
3649 | { | |
3650 | gfc_error ("Redundant SOURCE tag found at %L ", &tmp->where); | |
3651 | goto cleanup; | |
3652 | } | |
3653 | ||
3654 | /* The next 2 conditionals check C631. */ | |
3655 | if (ts.type != BT_UNKNOWN) | |
3656 | { | |
3657 | gfc_error ("SOURCE tag at %L conflicts with the typespec at %L", | |
3658 | &tmp->where, &old_locus); | |
3659 | goto cleanup; | |
3660 | } | |
3661 | ||
4cb2a867 TB |
3662 | if (head->next |
3663 | && gfc_notify_std (GFC_STD_F2008, "Fortran 2008: SOURCE tag at %L" | |
0c133211 | 3664 | " with more than a single allocate object", |
4cb2a867 TB |
3665 | &tmp->where) == FAILURE) |
3666 | goto cleanup; | |
8c6a85e3 TB |
3667 | |
3668 | source = tmp; | |
3669 | tmp = NULL; | |
3670 | saw_source = true; | |
3671 | ||
3672 | if (gfc_match_char (',') == MATCH_YES) | |
3673 | goto alloc_opt_list; | |
6de9cd9a | 3674 | } |
8c6a85e3 TB |
3675 | |
3676 | m = gfc_match (" mold = %e", &tmp); | |
3677 | if (m == MATCH_ERROR) | |
3678 | goto cleanup; | |
3679 | if (m == MATCH_YES) | |
3680 | { | |
3681 | if (gfc_notify_std (GFC_STD_F2008, "Fortran 2008: MOLD tag at %L", | |
3682 | &tmp->where) == FAILURE) | |
3683 | goto cleanup; | |
3684 | ||
3685 | /* Check F08:C636. */ | |
3686 | if (saw_mold) | |
3687 | { | |
3688 | gfc_error ("Redundant MOLD tag found at %L ", &tmp->where); | |
3689 | goto cleanup; | |
3690 | } | |
3691 | ||
3692 | /* Check F08:C637. */ | |
3693 | if (ts.type != BT_UNKNOWN) | |
3694 | { | |
3695 | gfc_error ("MOLD tag at %L conflicts with the typespec at %L", | |
3696 | &tmp->where, &old_locus); | |
3697 | goto cleanup; | |
3698 | } | |
3699 | ||
3700 | mold = tmp; | |
3701 | tmp = NULL; | |
3702 | saw_mold = true; | |
3703 | mold->mold = 1; | |
3704 | ||
3705 | if (gfc_match_char (',') == MATCH_YES) | |
3706 | goto alloc_opt_list; | |
3707 | } | |
3708 | ||
3709 | gfc_gobble_whitespace (); | |
3710 | ||
3711 | if (gfc_peek_char () == ')') | |
3712 | break; | |
6de9cd9a DN |
3713 | } |
3714 | ||
8c6a85e3 TB |
3715 | if (gfc_match (" )%t") != MATCH_YES) |
3716 | goto syntax; | |
3717 | ||
3718 | /* Check F08:C637. */ | |
3719 | if (source && mold) | |
3720 | { | |
3721 | gfc_error ("MOLD tag at %L conflicts with SOURCE tag at %L", | |
3722 | &mold->where, &source->where); | |
3723 | goto cleanup; | |
3724 | } | |
3725 | ||
3726 | /* Check F03:C623, */ | |
3727 | if (saw_deferred && ts.type == BT_UNKNOWN && !source && !mold) | |
3728 | { | |
3729 | gfc_error ("Allocate-object at %L with a deferred type parameter " | |
3730 | "requires either a type-spec or SOURCE tag or a MOLD tag", | |
3731 | &deferred_locus); | |
3732 | goto cleanup; | |
3733 | } | |
3734 | ||
3735 | new_st.op = EXEC_ALLOCATE; | |
3736 | new_st.expr1 = stat; | |
3737 | new_st.expr2 = errmsg; | |
3738 | if (source) | |
3739 | new_st.expr3 = source; | |
3740 | else | |
3741 | new_st.expr3 = mold; | |
3742 | new_st.ext.alloc.list = head; | |
3743 | new_st.ext.alloc.ts = ts; | |
6de9cd9a DN |
3744 | |
3745 | return MATCH_YES; | |
3746 | ||
3747 | syntax: | |
8c6a85e3 | 3748 | gfc_syntax_error (ST_ALLOCATE); |
6de9cd9a DN |
3749 | |
3750 | cleanup: | |
8c6a85e3 TB |
3751 | gfc_free_expr (errmsg); |
3752 | gfc_free_expr (source); | |
3753 | gfc_free_expr (stat); | |
3754 | gfc_free_expr (mold); | |
3755 | if (tmp && tmp->expr_type) gfc_free_expr (tmp); | |
3756 | gfc_free_alloc_list (head); | |
6de9cd9a DN |
3757 | return MATCH_ERROR; |
3758 | } | |
3759 | ||
3760 | ||
8c6a85e3 TB |
3761 | /* Match a NULLIFY statement. A NULLIFY statement is transformed into |
3762 | a set of pointer assignments to intrinsic NULL(). */ | |
9056bd70 | 3763 | |
8c6a85e3 TB |
3764 | match |
3765 | gfc_match_nullify (void) | |
9056bd70 | 3766 | { |
8c6a85e3 TB |
3767 | gfc_code *tail; |
3768 | gfc_expr *e, *p; | |
3769 | match m; | |
9056bd70 | 3770 | |
8c6a85e3 | 3771 | tail = NULL; |
53814b8f | 3772 | |
8c6a85e3 TB |
3773 | if (gfc_match_char ('(') != MATCH_YES) |
3774 | goto syntax; | |
9056bd70 | 3775 | |
8c6a85e3 | 3776 | for (;;) |
9056bd70 | 3777 | { |
8c6a85e3 TB |
3778 | m = gfc_match_variable (&p, 0); |
3779 | if (m == MATCH_ERROR) | |
3780 | goto cleanup; | |
3781 | if (m == MATCH_NO) | |
3782 | goto syntax; | |
3783 | ||
3784 | if (gfc_check_do_variable (p->symtree)) | |
3785 | goto cleanup; | |
3786 | ||
3787 | /* F2008, C1242. */ | |
3788 | if (gfc_is_coindexed (p)) | |
3789 | { | |
0c133211 | 3790 | gfc_error ("Pointer object at %C shall not be coindexed"); |
8c6a85e3 TB |
3791 | goto cleanup; |
3792 | } | |
3793 | ||
3794 | /* build ' => NULL() '. */ | |
3795 | e = gfc_get_null_expr (&gfc_current_locus); | |
3796 | ||
3797 | /* Chain to list. */ | |
3798 | if (tail == NULL) | |
3799 | tail = &new_st; | |
3800 | else | |
3801 | { | |
3802 | tail->next = gfc_get_code (); | |
3803 | tail = tail->next; | |
3804 | } | |
3805 | ||
3806 | tail->op = EXEC_POINTER_ASSIGN; | |
3807 | tail->expr1 = p; | |
3808 | tail->expr2 = e; | |
3809 | ||
3810 | if (gfc_match (" )%t") == MATCH_YES) | |
3811 | break; | |
3812 | if (gfc_match_char (',') != MATCH_YES) | |
3813 | goto syntax; | |
9056bd70 TS |
3814 | } |
3815 | ||
8c6a85e3 TB |
3816 | return MATCH_YES; |
3817 | ||
3818 | syntax: | |
3819 | gfc_syntax_error (ST_NULLIFY); | |
3820 | ||
3821 | cleanup: | |
3822 | gfc_free_statements (new_st.next); | |
3823 | new_st.next = NULL; | |
3824 | gfc_free_expr (new_st.expr1); | |
3825 | new_st.expr1 = NULL; | |
3826 | gfc_free_expr (new_st.expr2); | |
3827 | new_st.expr2 = NULL; | |
3828 | return MATCH_ERROR; | |
9056bd70 TS |
3829 | } |
3830 | ||
3831 | ||
8c6a85e3 | 3832 | /* Match a DEALLOCATE statement. */ |
6de9cd9a | 3833 | |
8c6a85e3 TB |
3834 | match |
3835 | gfc_match_deallocate (void) | |
6de9cd9a | 3836 | { |
8c6a85e3 TB |
3837 | gfc_alloc *head, *tail; |
3838 | gfc_expr *stat, *errmsg, *tmp; | |
3839 | gfc_symbol *sym; | |
6de9cd9a | 3840 | match m; |
8c6a85e3 | 3841 | bool saw_stat, saw_errmsg, b1, b2; |
6de9cd9a | 3842 | |
8c6a85e3 TB |
3843 | head = tail = NULL; |
3844 | stat = errmsg = tmp = NULL; | |
3845 | saw_stat = saw_errmsg = false; | |
6de9cd9a | 3846 | |
8c6a85e3 TB |
3847 | if (gfc_match_char ('(') != MATCH_YES) |
3848 | goto syntax; | |
3849 | ||
3850 | for (;;) | |
6de9cd9a | 3851 | { |
8c6a85e3 TB |
3852 | if (head == NULL) |
3853 | head = tail = gfc_get_alloc (); | |
3854 | else | |
3855 | { | |
3856 | tail->next = gfc_get_alloc (); | |
3857 | tail = tail->next; | |
3858 | } | |
3859 | ||
3860 | m = gfc_match_variable (&tail->expr, 0); | |
3861 | if (m == MATCH_ERROR) | |
3862 | goto cleanup; | |
3863 | if (m == MATCH_NO) | |
3864 | goto syntax; | |
3865 | ||
3866 | if (gfc_check_do_variable (tail->expr->symtree)) | |
3867 | goto cleanup; | |
3868 | ||
3869 | sym = tail->expr->symtree->n.sym; | |
3870 | ||
3871 | if (gfc_pure (NULL) && gfc_impure_variable (sym)) | |
3872 | { | |
3873 | gfc_error ("Illegal allocate-object at %C for a PURE procedure"); | |
3874 | goto cleanup; | |
3875 | } | |
3876 | ||
3877 | if (gfc_implicit_pure (NULL) && gfc_impure_variable (sym)) | |
3878 | gfc_current_ns->proc_name->attr.implicit_pure = 0; | |
3879 | ||
3880 | if (gfc_is_coarray (tail->expr) | |
3881 | && gfc_find_state (COMP_DO_CONCURRENT) == SUCCESS) | |
3882 | { | |
3883 | gfc_error ("DEALLOCATE of coarray at %C in DO CONCURRENT block"); | |
3884 | goto cleanup; | |
3885 | } | |
3886 | ||
3887 | if (gfc_is_coarray (tail->expr) | |
3888 | && gfc_find_state (COMP_CRITICAL) == SUCCESS) | |
3889 | { | |
3890 | gfc_error ("DEALLOCATE of coarray at %C in CRITICAL block"); | |
3891 | goto cleanup; | |
3892 | } | |
3893 | ||
3894 | /* FIXME: disable the checking on derived types. */ | |
3895 | b1 = !(tail->expr->ref | |
3896 | && (tail->expr->ref->type == REF_COMPONENT | |
3897 | || tail->expr->ref->type == REF_ARRAY)); | |
3898 | if (sym && sym->ts.type == BT_CLASS) | |
3899 | b2 = !(CLASS_DATA (sym)->attr.allocatable | |
3900 | || CLASS_DATA (sym)->attr.class_pointer); | |
3901 | else | |
3902 | b2 = sym && !(sym->attr.allocatable || sym->attr.pointer | |
3903 | || sym->attr.proc_pointer); | |
3904 | if (b1 && b2) | |
3905 | { | |
3906 | gfc_error ("Allocate-object at %C is not a nonprocedure pointer " | |
b59e9071 | 3907 | "nor an allocatable variable"); |
8c6a85e3 TB |
3908 | goto cleanup; |
3909 | } | |
3910 | ||
3911 | if (gfc_match_char (',') != MATCH_YES) | |
3912 | break; | |
3913 | ||
3914 | dealloc_opt_list: | |
3915 | ||
3916 | m = gfc_match (" stat = %v", &tmp); | |
3917 | if (m == MATCH_ERROR) | |
3918 | goto cleanup; | |
3919 | if (m == MATCH_YES) | |
3920 | { | |
3921 | if (saw_stat) | |
3922 | { | |
3923 | gfc_error ("Redundant STAT tag found at %L ", &tmp->where); | |
3924 | gfc_free_expr (tmp); | |
3925 | goto cleanup; | |
3926 | } | |
3927 | ||
3928 | stat = tmp; | |
3929 | saw_stat = true; | |
3930 | ||
3931 | if (gfc_check_do_variable (stat->symtree)) | |
3932 | goto cleanup; | |
3933 | ||
3934 | if (gfc_match_char (',') == MATCH_YES) | |
3935 | goto dealloc_opt_list; | |
3936 | } | |
3937 | ||
3938 | m = gfc_match (" errmsg = %v", &tmp); | |
3939 | if (m == MATCH_ERROR) | |
3940 | goto cleanup; | |
3941 | if (m == MATCH_YES) | |
3942 | { | |
3943 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: ERRMSG at %L", | |
3944 | &tmp->where) == FAILURE) | |
3945 | goto cleanup; | |
3946 | ||
3947 | if (saw_errmsg) | |
3948 | { | |
3949 | gfc_error ("Redundant ERRMSG tag found at %L ", &tmp->where); | |
3950 | gfc_free_expr (tmp); | |
3951 | goto cleanup; | |
3952 | } | |
3953 | ||
3954 | errmsg = tmp; | |
3955 | saw_errmsg = true; | |
3956 | ||
3957 | if (gfc_match_char (',') == MATCH_YES) | |
3958 | goto dealloc_opt_list; | |
3959 | } | |
3960 | ||
3961 | gfc_gobble_whitespace (); | |
3962 | ||
3963 | if (gfc_peek_char () == ')') | |
3964 | break; | |
6de9cd9a DN |
3965 | } |
3966 | ||
8c6a85e3 TB |
3967 | if (gfc_match (" )%t") != MATCH_YES) |
3968 | goto syntax; | |
3969 | ||
3970 | new_st.op = EXEC_DEALLOCATE; | |
3971 | new_st.expr1 = stat; | |
3972 | new_st.expr2 = errmsg; | |
3973 | new_st.ext.alloc.list = head; | |
3974 | ||
3975 | return MATCH_YES; | |
6de9cd9a | 3976 | |
8c6a85e3 TB |
3977 | syntax: |
3978 | gfc_syntax_error (ST_DEALLOCATE); | |
6de9cd9a | 3979 | |
8c6a85e3 TB |
3980 | cleanup: |
3981 | gfc_free_expr (errmsg); | |
3982 | gfc_free_expr (stat); | |
3983 | gfc_free_alloc_list (head); | |
6de9cd9a DN |
3984 | return MATCH_ERROR; |
3985 | } | |
3986 | ||
3987 | ||
8c6a85e3 | 3988 | /* Match a RETURN statement. */ |
6de9cd9a DN |
3989 | |
3990 | match | |
8c6a85e3 | 3991 | gfc_match_return (void) |
6de9cd9a | 3992 | { |
8c6a85e3 | 3993 | gfc_expr *e; |
6de9cd9a | 3994 | match m; |
8c6a85e3 | 3995 | gfc_compile_state s; |
6de9cd9a | 3996 | |
8c6a85e3 TB |
3997 | e = NULL; |
3998 | ||
3999 | if (gfc_find_state (COMP_CRITICAL) == SUCCESS) | |
6de9cd9a | 4000 | { |
8c6a85e3 TB |
4001 | gfc_error ("Image control statement RETURN at %C in CRITICAL block"); |
4002 | return MATCH_ERROR; | |
6de9cd9a DN |
4003 | } |
4004 | ||
8c6a85e3 | 4005 | if (gfc_find_state (COMP_DO_CONCURRENT) == SUCCESS) |
6de9cd9a | 4006 | { |
8c6a85e3 TB |
4007 | gfc_error ("Image control statement RETURN at %C in DO CONCURRENT block"); |
4008 | return MATCH_ERROR; | |
4009 | } | |
f69ab0e0 | 4010 | |
8c6a85e3 TB |
4011 | if (gfc_match_eos () == MATCH_YES) |
4012 | goto done; | |
6de9cd9a | 4013 | |
8c6a85e3 TB |
4014 | if (gfc_find_state (COMP_SUBROUTINE) == FAILURE) |
4015 | { | |
4016 | gfc_error ("Alternate RETURN statement at %C is only allowed within " | |
4017 | "a SUBROUTINE"); | |
4018 | goto cleanup; | |
4019 | } | |
6de9cd9a | 4020 | |
8c6a85e3 TB |
4021 | if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: Alternate RETURN " |
4022 | "at %C") == FAILURE) | |
4023 | return MATCH_ERROR; | |
6de9cd9a | 4024 | |
8c6a85e3 TB |
4025 | if (gfc_current_form == FORM_FREE) |
4026 | { | |
4027 | /* The following are valid, so we can't require a blank after the | |
4028 | RETURN keyword: | |
4029 | return+1 | |
4030 | return(1) */ | |
4031 | char c = gfc_peek_ascii_char (); | |
4032 | if (ISALPHA (c) || ISDIGIT (c)) | |
4033 | return MATCH_NO; | |
4034 | } | |
6de9cd9a | 4035 | |
8c6a85e3 TB |
4036 | m = gfc_match (" %e%t", &e); |
4037 | if (m == MATCH_YES) | |
4038 | goto done; | |
4039 | if (m == MATCH_ERROR) | |
4040 | goto cleanup; | |
6de9cd9a | 4041 | |
8c6a85e3 | 4042 | gfc_syntax_error (ST_RETURN); |
6de9cd9a | 4043 | |
8c6a85e3 TB |
4044 | cleanup: |
4045 | gfc_free_expr (e); | |
4046 | return MATCH_ERROR; | |
6de9cd9a | 4047 | |
8c6a85e3 TB |
4048 | done: |
4049 | gfc_enclosing_unit (&s); | |
4050 | if (s == COMP_PROGRAM | |
4051 | && gfc_notify_std (GFC_STD_GNU, "Extension: RETURN statement in " | |
4052 | "main program at %C") == FAILURE) | |
4053 | return MATCH_ERROR; | |
30aabb86 | 4054 | |
8c6a85e3 TB |
4055 | new_st.op = EXEC_RETURN; |
4056 | new_st.expr1 = e; | |
30aabb86 | 4057 | |
8c6a85e3 TB |
4058 | return MATCH_YES; |
4059 | } | |
30aabb86 | 4060 | |
30aabb86 | 4061 | |
8c6a85e3 TB |
4062 | /* Match the call of a type-bound procedure, if CALL%var has already been |
4063 | matched and var found to be a derived-type variable. */ | |
30aabb86 | 4064 | |
8c6a85e3 TB |
4065 | static match |
4066 | match_typebound_call (gfc_symtree* varst) | |
4067 | { | |
4068 | gfc_expr* base; | |
4069 | match m; | |
30aabb86 | 4070 | |
8c6a85e3 TB |
4071 | base = gfc_get_expr (); |
4072 | base->expr_type = EXPR_VARIABLE; | |
4073 | base->symtree = varst; | |
4074 | base->where = gfc_current_locus; | |
4075 | gfc_set_sym_referenced (varst->n.sym); | |
4076 | ||
4077 | m = gfc_match_varspec (base, 0, true, true); | |
4078 | if (m == MATCH_NO) | |
4079 | gfc_error ("Expected component reference at %C"); | |
4080 | if (m != MATCH_YES) | |
4081 | return MATCH_ERROR; | |
6de9cd9a | 4082 | |
8c6a85e3 TB |
4083 | if (gfc_match_eos () != MATCH_YES) |
4084 | { | |
4085 | gfc_error ("Junk after CALL at %C"); | |
4086 | return MATCH_ERROR; | |
4087 | } | |
30aabb86 | 4088 | |
8c6a85e3 TB |
4089 | if (base->expr_type == EXPR_COMPCALL) |
4090 | new_st.op = EXEC_COMPCALL; | |
4091 | else if (base->expr_type == EXPR_PPC) | |
4092 | new_st.op = EXEC_CALL_PPC; | |
4093 | else | |
4094 | { | |
4095 | gfc_error ("Expected type-bound procedure or procedure pointer component " | |
4096 | "at %C"); | |
4097 | return MATCH_ERROR; | |
6de9cd9a | 4098 | } |
8c6a85e3 | 4099 | new_st.expr1 = base; |
6de9cd9a | 4100 | |
6de9cd9a | 4101 | return MATCH_YES; |
6de9cd9a DN |
4102 | } |
4103 | ||
4104 | ||
8c6a85e3 TB |
4105 | /* Match a CALL statement. The tricky part here are possible |
4106 | alternate return specifiers. We handle these by having all | |
4107 | "subroutines" actually return an integer via a register that gives | |
4108 | the return number. If the call specifies alternate returns, we | |
4109 | generate code for a SELECT statement whose case clauses contain | |
4110 | GOTOs to the various labels. */ | |
6de9cd9a DN |
4111 | |
4112 | match | |
8c6a85e3 | 4113 | gfc_match_call (void) |
6de9cd9a DN |
4114 | { |
4115 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
8c6a85e3 TB |
4116 | gfc_actual_arglist *a, *arglist; |
4117 | gfc_case *new_case; | |
6de9cd9a | 4118 | gfc_symbol *sym; |
8c6a85e3 TB |
4119 | gfc_symtree *st; |
4120 | gfc_code *c; | |
6de9cd9a | 4121 | match m; |
8c6a85e3 | 4122 | int i; |
6de9cd9a | 4123 | |
8c6a85e3 | 4124 | arglist = NULL; |
6de9cd9a | 4125 | |
8c6a85e3 TB |
4126 | m = gfc_match ("% %n", name); |
4127 | if (m == MATCH_NO) | |
4128 | goto syntax; | |
6de9cd9a | 4129 | if (m != MATCH_YES) |
8c6a85e3 | 4130 | return m; |
6de9cd9a | 4131 | |
8c6a85e3 | 4132 | if (gfc_get_ha_sym_tree (name, &st)) |
6de9cd9a DN |
4133 | return MATCH_ERROR; |
4134 | ||
8c6a85e3 | 4135 | sym = st->n.sym; |
6de9cd9a | 4136 | |
8c6a85e3 TB |
4137 | /* If this is a variable of derived-type, it probably starts a type-bound |
4138 | procedure call. */ | |
4139 | if ((sym->attr.flavor != FL_PROCEDURE | |
4140 | || gfc_is_function_return_value (sym, gfc_current_ns)) | |
4141 | && (sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS)) | |
4142 | return match_typebound_call (st); | |
6de9cd9a | 4143 | |
8c6a85e3 TB |
4144 | /* If it does not seem to be callable (include functions so that the |
4145 | right association is made. They are thrown out in resolution.) | |
4146 | ... */ | |
4147 | if (!sym->attr.generic | |
4148 | && !sym->attr.subroutine | |
4149 | && !sym->attr.function) | |
4150 | { | |
4151 | if (!(sym->attr.external && !sym->attr.referenced)) | |
4152 | { | |
4153 | /* ...create a symbol in this scope... */ | |
4154 | if (sym->ns != gfc_current_ns | |
4155 | && gfc_get_sym_tree (name, NULL, &st, false) == 1) | |
4156 | return MATCH_ERROR; | |
6de9cd9a | 4157 | |
8c6a85e3 TB |
4158 | if (sym != st->n.sym) |
4159 | sym = st->n.sym; | |
4160 | } | |
6de9cd9a | 4161 | |
8c6a85e3 TB |
4162 | /* ...and then to try to make the symbol into a subroutine. */ |
4163 | if (gfc_add_subroutine (&sym->attr, sym->name, NULL) == FAILURE) | |
4164 | return MATCH_ERROR; | |
4165 | } | |
6de9cd9a | 4166 | |
8c6a85e3 | 4167 | gfc_set_sym_referenced (sym); |
6de9cd9a | 4168 | |
8c6a85e3 | 4169 | if (gfc_match_eos () != MATCH_YES) |
6de9cd9a | 4170 | { |
8c6a85e3 TB |
4171 | m = gfc_match_actual_arglist (1, &arglist); |
4172 | if (m == MATCH_NO) | |
4173 | goto syntax; | |
4174 | if (m == MATCH_ERROR) | |
4175 | goto cleanup; | |
4176 | ||
4177 | if (gfc_match_eos () != MATCH_YES) | |
4178 | goto syntax; | |
6de9cd9a | 4179 | } |
6de9cd9a | 4180 | |
8c6a85e3 TB |
4181 | /* If any alternate return labels were found, construct a SELECT |
4182 | statement that will jump to the right place. */ | |
6de9cd9a | 4183 | |
8c6a85e3 TB |
4184 | i = 0; |
4185 | for (a = arglist; a; a = a->next) | |
4186 | if (a->expr == NULL) | |
4187 | i = 1; | |
6de9cd9a | 4188 | |
8c6a85e3 TB |
4189 | if (i) |
4190 | { | |
4191 | gfc_symtree *select_st; | |
4192 | gfc_symbol *select_sym; | |
4193 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
6de9cd9a | 4194 | |
8c6a85e3 TB |
4195 | new_st.next = c = gfc_get_code (); |
4196 | c->op = EXEC_SELECT; | |
4197 | sprintf (name, "_result_%s", sym->name); | |
4198 | gfc_get_ha_sym_tree (name, &select_st); /* Can't fail. */ | |
6de9cd9a | 4199 | |
8c6a85e3 TB |
4200 | select_sym = select_st->n.sym; |
4201 | select_sym->ts.type = BT_INTEGER; | |
4202 | select_sym->ts.kind = gfc_default_integer_kind; | |
4203 | gfc_set_sym_referenced (select_sym); | |
4204 | c->expr1 = gfc_get_expr (); | |
4205 | c->expr1->expr_type = EXPR_VARIABLE; | |
4206 | c->expr1->symtree = select_st; | |
4207 | c->expr1->ts = select_sym->ts; | |
4208 | c->expr1->where = gfc_current_locus; | |
4209 | ||
4210 | i = 0; | |
4211 | for (a = arglist; a; a = a->next) | |
6de9cd9a | 4212 | { |
8c6a85e3 TB |
4213 | if (a->expr != NULL) |
4214 | continue; | |
6de9cd9a | 4215 | |
8c6a85e3 TB |
4216 | if (gfc_reference_st_label (a->label, ST_LABEL_TARGET) == FAILURE) |
4217 | continue; | |
e0e85e06 | 4218 | |
8c6a85e3 | 4219 | i++; |
6de9cd9a | 4220 | |
8c6a85e3 TB |
4221 | c->block = gfc_get_code (); |
4222 | c = c->block; | |
4223 | c->op = EXEC_SELECT; | |
6de9cd9a | 4224 | |
8c6a85e3 TB |
4225 | new_case = gfc_get_case (); |
4226 | new_case->high = gfc_get_int_expr (gfc_default_integer_kind, NULL, i); | |
4227 | new_case->low = new_case->high; | |
4228 | c->ext.block.case_list = new_case; | |
6de9cd9a | 4229 | |
8c6a85e3 TB |
4230 | c->next = gfc_get_code (); |
4231 | c->next->op = EXEC_GOTO; | |
4232 | c->next->label1 = a->label; | |
4233 | } | |
4234 | } | |
e0e85e06 | 4235 | |
8c6a85e3 TB |
4236 | new_st.op = EXEC_CALL; |
4237 | new_st.symtree = st; | |
4238 | new_st.ext.actual = arglist; | |
6de9cd9a | 4239 | |
8c6a85e3 | 4240 | return MATCH_YES; |
6de9cd9a | 4241 | |
8c6a85e3 TB |
4242 | syntax: |
4243 | gfc_syntax_error (ST_CALL); | |
6de9cd9a | 4244 | |
8c6a85e3 TB |
4245 | cleanup: |
4246 | gfc_free_actual_arglist (arglist); | |
4247 | return MATCH_ERROR; | |
4248 | } | |
6de9cd9a | 4249 | |
6de9cd9a | 4250 | |
8c6a85e3 TB |
4251 | /* Given a name, return a pointer to the common head structure, |
4252 | creating it if it does not exist. If FROM_MODULE is nonzero, we | |
4253 | mangle the name so that it doesn't interfere with commons defined | |
4254 | in the using namespace. | |
4255 | TODO: Add to global symbol tree. */ | |
4256 | ||
4257 | gfc_common_head * | |
4258 | gfc_get_common (const char *name, int from_module) | |
4259 | { | |
4260 | gfc_symtree *st; | |
4261 | static int serial = 0; | |
4262 | char mangled_name[GFC_MAX_SYMBOL_LEN + 1]; | |
4263 | ||
4264 | if (from_module) | |
4265 | { | |
4266 | /* A use associated common block is only needed to correctly layout | |
4267 | the variables it contains. */ | |
4268 | snprintf (mangled_name, GFC_MAX_SYMBOL_LEN, "_%d_%s", serial++, name); | |
4269 | st = gfc_new_symtree (&gfc_current_ns->common_root, mangled_name); | |
6de9cd9a | 4270 | } |
8c6a85e3 TB |
4271 | else |
4272 | { | |
4273 | st = gfc_find_symtree (gfc_current_ns->common_root, name); | |
6de9cd9a | 4274 | |
8c6a85e3 TB |
4275 | if (st == NULL) |
4276 | st = gfc_new_symtree (&gfc_current_ns->common_root, name); | |
4277 | } | |
6de9cd9a | 4278 | |
8c6a85e3 TB |
4279 | if (st->n.common == NULL) |
4280 | { | |
4281 | st->n.common = gfc_get_common_head (); | |
4282 | st->n.common->where = gfc_current_locus; | |
4283 | strcpy (st->n.common->name, name); | |
4284 | } | |
6de9cd9a | 4285 | |
8c6a85e3 | 4286 | return st->n.common; |
6de9cd9a DN |
4287 | } |
4288 | ||
4289 | ||
8c6a85e3 | 4290 | /* Match a common block name. */ |
6de9cd9a | 4291 | |
8c6a85e3 | 4292 | match match_common_name (char *name) |
6de9cd9a DN |
4293 | { |
4294 | match m; | |
4295 | ||
8c6a85e3 TB |
4296 | if (gfc_match_char ('/') == MATCH_NO) |
4297 | { | |
4298 | name[0] = '\0'; | |
4299 | return MATCH_YES; | |
4300 | } | |
6de9cd9a | 4301 | |
8c6a85e3 TB |
4302 | if (gfc_match_char ('/') == MATCH_YES) |
4303 | { | |
4304 | name[0] = '\0'; | |
4305 | return MATCH_YES; | |
4306 | } | |
6de9cd9a | 4307 | |
8c6a85e3 | 4308 | m = gfc_match_name (name); |
6de9cd9a | 4309 | |
8c6a85e3 TB |
4310 | if (m == MATCH_ERROR) |
4311 | return MATCH_ERROR; | |
4312 | if (m == MATCH_YES && gfc_match_char ('/') == MATCH_YES) | |
4313 | return MATCH_YES; | |
6de9cd9a | 4314 | |
8c6a85e3 TB |
4315 | gfc_error ("Syntax error in common block name at %C"); |
4316 | return MATCH_ERROR; | |
31fee91e MM |
4317 | } |
4318 | ||
4319 | ||
8c6a85e3 | 4320 | /* Match a COMMON statement. */ |
6de9cd9a DN |
4321 | |
4322 | match | |
8c6a85e3 | 4323 | gfc_match_common (void) |
6de9cd9a | 4324 | { |
8c6a85e3 TB |
4325 | gfc_symbol *sym, **head, *tail, *other, *old_blank_common; |
4326 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
4327 | gfc_common_head *t; | |
4328 | gfc_array_spec *as; | |
4329 | gfc_equiv *e1, *e2; | |
6de9cd9a | 4330 | match m; |
8c6a85e3 | 4331 | gfc_gsymbol *gsym; |
6de9cd9a | 4332 | |
8c6a85e3 TB |
4333 | old_blank_common = gfc_current_ns->blank_common.head; |
4334 | if (old_blank_common) | |
4335 | { | |
4336 | while (old_blank_common->common_next) | |
4337 | old_blank_common = old_blank_common->common_next; | |
4338 | } | |
4339 | ||
4340 | as = NULL; | |
6de9cd9a DN |
4341 | |
4342 | for (;;) | |
4343 | { | |
8c6a85e3 TB |
4344 | m = match_common_name (name); |
4345 | if (m == MATCH_ERROR) | |
4346 | goto cleanup; | |
6de9cd9a | 4347 | |
8c6a85e3 TB |
4348 | gsym = gfc_get_gsymbol (name); |
4349 | if (gsym->type != GSYM_UNKNOWN && gsym->type != GSYM_COMMON) | |
4350 | { | |
4351 | gfc_error ("Symbol '%s' at %C is already an external symbol that " | |
4352 | "is not COMMON", name); | |
4353 | goto cleanup; | |
4354 | } | |
6de9cd9a | 4355 | |
8c6a85e3 TB |
4356 | if (gsym->type == GSYM_UNKNOWN) |
4357 | { | |
4358 | gsym->type = GSYM_COMMON; | |
4359 | gsym->where = gfc_current_locus; | |
4360 | gsym->defined = 1; | |
4361 | } | |
6de9cd9a | 4362 | |
8c6a85e3 TB |
4363 | gsym->used = 1; |
4364 | ||
4365 | if (name[0] == '\0') | |
4366 | { | |
4367 | t = &gfc_current_ns->blank_common; | |
4368 | if (t->head == NULL) | |
4369 | t->where = gfc_current_locus; | |
4370 | } | |
4371 | else | |
4372 | { | |
4373 | t = gfc_get_common (name, 0); | |
4374 | } | |
4375 | head = &t->head; | |
4376 | ||
4377 | if (*head == NULL) | |
4378 | tail = NULL; | |
4379 | else | |
4380 | { | |
4381 | tail = *head; | |
4382 | while (tail->common_next) | |
4383 | tail = tail->common_next; | |
4384 | } | |
6de9cd9a | 4385 | |
8c6a85e3 | 4386 | /* Grab the list of symbols. */ |
6de9cd9a DN |
4387 | for (;;) |
4388 | { | |
8c6a85e3 | 4389 | m = gfc_match_symbol (&sym, 0); |
6de9cd9a DN |
4390 | if (m == MATCH_ERROR) |
4391 | goto cleanup; | |
4392 | if (m == MATCH_NO) | |
4393 | goto syntax; | |
4394 | ||
8c6a85e3 TB |
4395 | /* Store a ref to the common block for error checking. */ |
4396 | sym->common_block = t; | |
4397 | ||
4398 | /* See if we know the current common block is bind(c), and if | |
4399 | so, then see if we can check if the symbol is (which it'll | |
4400 | need to be). This can happen if the bind(c) attr stmt was | |
4401 | applied to the common block, and the variable(s) already | |
4402 | defined, before declaring the common block. */ | |
4403 | if (t->is_bind_c == 1) | |
4404 | { | |
4405 | if (sym->ts.type != BT_UNKNOWN && sym->ts.is_c_interop != 1) | |
4406 | { | |
4407 | /* If we find an error, just print it and continue, | |
4408 | cause it's just semantic, and we can see if there | |
4409 | are more errors. */ | |
4410 | gfc_error_now ("Variable '%s' at %L in common block '%s' " | |
4411 | "at %C must be declared with a C " | |
4412 | "interoperable kind since common block " | |
4413 | "'%s' is bind(c)", | |
4414 | sym->name, &(sym->declared_at), t->name, | |
4415 | t->name); | |
4416 | } | |
4417 | ||
4418 | if (sym->attr.is_bind_c == 1) | |
4419 | gfc_error_now ("Variable '%s' in common block " | |
4420 | "'%s' at %C can not be bind(c) since " | |
4421 | "it is not global", sym->name, t->name); | |
4422 | } | |
4423 | ||
4424 | if (sym->attr.in_common) | |
e8ec07e1 | 4425 | { |
8c6a85e3 TB |
4426 | gfc_error ("Symbol '%s' at %C is already in a COMMON block", |
4427 | sym->name); | |
e8ec07e1 PT |
4428 | goto cleanup; |
4429 | } | |
4430 | ||
8c6a85e3 TB |
4431 | if (((sym->value != NULL && sym->value->expr_type != EXPR_NULL) |
4432 | || sym->attr.data) && gfc_current_state () != COMP_BLOCK_DATA) | |
30aabb86 | 4433 | { |
8c6a85e3 TB |
4434 | if (gfc_notify_std (GFC_STD_GNU, "Initialized symbol '%s' at %C " |
4435 | "can only be COMMON in " | |
4436 | "BLOCK DATA", sym->name) | |
4437 | == FAILURE) | |
30aabb86 | 4438 | goto cleanup; |
8c6a85e3 | 4439 | } |
6de9cd9a | 4440 | |
8c6a85e3 TB |
4441 | if (gfc_add_in_common (&sym->attr, sym->name, NULL) == FAILURE) |
4442 | goto cleanup; | |
6de9cd9a | 4443 | |
8c6a85e3 TB |
4444 | if (tail != NULL) |
4445 | tail->common_next = sym; | |
4446 | else | |
4447 | *head = sym; | |
6de9cd9a | 4448 | |
8c6a85e3 | 4449 | tail = sym; |
6de9cd9a | 4450 | |
8c6a85e3 TB |
4451 | /* Deal with an optional array specification after the |
4452 | symbol name. */ | |
4453 | m = gfc_match_array_spec (&as, true, true); | |
4454 | if (m == MATCH_ERROR) | |
4455 | goto cleanup; | |
6de9cd9a | 4456 | |
8c6a85e3 TB |
4457 | if (m == MATCH_YES) |
4458 | { | |
4459 | if (as->type != AS_EXPLICIT) | |
4460 | { | |
4461 | gfc_error ("Array specification for symbol '%s' in COMMON " | |
4462 | "at %C must be explicit", sym->name); | |
4463 | goto cleanup; | |
4464 | } | |
b251af97 | 4465 | |
8c6a85e3 TB |
4466 | if (gfc_add_dimension (&sym->attr, sym->name, NULL) == FAILURE) |
4467 | goto cleanup; | |
d68bd5a8 | 4468 | |
8c6a85e3 TB |
4469 | if (sym->attr.pointer) |
4470 | { | |
4471 | gfc_error ("Symbol '%s' in COMMON at %C cannot be a " | |
4472 | "POINTER array", sym->name); | |
4473 | goto cleanup; | |
4474 | } | |
4213f93b | 4475 | |
8c6a85e3 TB |
4476 | sym->as = as; |
4477 | as = NULL; | |
4213f93b | 4478 | |
8c6a85e3 | 4479 | } |
9081e356 | 4480 | |
8c6a85e3 | 4481 | sym->common_head = t; |
4213f93b | 4482 | |
8c6a85e3 TB |
4483 | /* Check to see if the symbol is already in an equivalence group. |
4484 | If it is, set the other members as being in common. */ | |
4485 | if (sym->attr.in_equivalence) | |
4486 | { | |
4487 | for (e1 = gfc_current_ns->equiv; e1; e1 = e1->next) | |
4488 | { | |
4489 | for (e2 = e1; e2; e2 = e2->eq) | |
4490 | if (e2->expr->symtree->n.sym == sym) | |
4491 | goto equiv_found; | |
4213f93b | 4492 | |
8c6a85e3 | 4493 | continue; |
d68bd5a8 | 4494 | |
8c6a85e3 | 4495 | equiv_found: |
4213f93b | 4496 | |
8c6a85e3 TB |
4497 | for (e2 = e1; e2; e2 = e2->eq) |
4498 | { | |
4499 | other = e2->expr->symtree->n.sym; | |
4500 | if (other->common_head | |
4501 | && other->common_head != sym->common_head) | |
4502 | { | |
4503 | gfc_error ("Symbol '%s', in COMMON block '%s' at " | |
4504 | "%C is being indirectly equivalenced to " | |
4505 | "another COMMON block '%s'", | |
4506 | sym->name, sym->common_head->name, | |
4507 | other->common_head->name); | |
4508 | goto cleanup; | |
4509 | } | |
4510 | other->attr.in_common = 1; | |
4511 | other->common_head = t; | |
4512 | } | |
4513 | } | |
4514 | } | |
d68bd5a8 | 4515 | |
4213f93b | 4516 | |
8c6a85e3 TB |
4517 | gfc_gobble_whitespace (); |
4518 | if (gfc_match_eos () == MATCH_YES) | |
4519 | goto done; | |
4520 | if (gfc_peek_ascii_char () == '/') | |
4521 | break; | |
4522 | if (gfc_match_char (',') != MATCH_YES) | |
4523 | goto syntax; | |
4524 | gfc_gobble_whitespace (); | |
4525 | if (gfc_peek_ascii_char () == '/') | |
4526 | break; | |
4527 | } | |
4213f93b PT |
4528 | } |
4529 | ||
8c6a85e3 TB |
4530 | done: |
4531 | return MATCH_YES; | |
4213f93b | 4532 | |
8c6a85e3 TB |
4533 | syntax: |
4534 | gfc_syntax_error (ST_COMMON); | |
4213f93b | 4535 | |
8c6a85e3 TB |
4536 | cleanup: |
4537 | if (old_blank_common) | |
4538 | old_blank_common->common_next = NULL; | |
4539 | else | |
4540 | gfc_current_ns->blank_common.head = NULL; | |
4541 | gfc_free_array_spec (as); | |
4542 | return MATCH_ERROR; | |
4213f93b PT |
4543 | } |
4544 | ||
6de9cd9a | 4545 | |
8c6a85e3 | 4546 | /* Match a BLOCK DATA program unit. */ |
6de9cd9a DN |
4547 | |
4548 | match | |
8c6a85e3 | 4549 | gfc_match_block_data (void) |
6de9cd9a | 4550 | { |
8c6a85e3 | 4551 | char name[GFC_MAX_SYMBOL_LEN + 1]; |
6de9cd9a | 4552 | gfc_symbol *sym; |
6de9cd9a DN |
4553 | match m; |
4554 | ||
8c6a85e3 TB |
4555 | if (gfc_match_eos () == MATCH_YES) |
4556 | { | |
4557 | gfc_new_block = NULL; | |
4558 | return MATCH_YES; | |
4559 | } | |
4560 | ||
4561 | m = gfc_match ("% %n%t", name); | |
6de9cd9a | 4562 | if (m != MATCH_YES) |
8c6a85e3 | 4563 | return MATCH_ERROR; |
6de9cd9a | 4564 | |
8c6a85e3 TB |
4565 | if (gfc_get_symbol (name, NULL, &sym)) |
4566 | return MATCH_ERROR; | |
6de9cd9a | 4567 | |
8c6a85e3 TB |
4568 | if (gfc_add_flavor (&sym->attr, FL_BLOCK_DATA, sym->name, NULL) == FAILURE) |
4569 | return MATCH_ERROR; | |
6de9cd9a | 4570 | |
8c6a85e3 | 4571 | gfc_new_block = sym; |
6de9cd9a | 4572 | |
8c6a85e3 TB |
4573 | return MATCH_YES; |
4574 | } | |
d71b89ca | 4575 | |
6de9cd9a | 4576 | |
8c6a85e3 | 4577 | /* Free a namelist structure. */ |
4213f93b | 4578 | |
8c6a85e3 TB |
4579 | void |
4580 | gfc_free_namelist (gfc_namelist *name) | |
4581 | { | |
4582 | gfc_namelist *n; | |
6de9cd9a | 4583 | |
8c6a85e3 TB |
4584 | for (; name; name = n) |
4585 | { | |
4586 | n = name->next; | |
4587 | free (name); | |
4588 | } | |
4589 | } | |
e2ab8b09 | 4590 | |
6de9cd9a | 4591 | |
8c6a85e3 | 4592 | /* Match a NAMELIST statement. */ |
6de9cd9a | 4593 | |
8c6a85e3 TB |
4594 | match |
4595 | gfc_match_namelist (void) | |
4596 | { | |
4597 | gfc_symbol *group_name, *sym; | |
4598 | gfc_namelist *nl; | |
4599 | match m, m2; | |
6de9cd9a | 4600 | |
8c6a85e3 TB |
4601 | m = gfc_match (" / %s /", &group_name); |
4602 | if (m == MATCH_NO) | |
4603 | goto syntax; | |
4604 | if (m == MATCH_ERROR) | |
4605 | goto error; | |
6de9cd9a | 4606 | |
8c6a85e3 TB |
4607 | for (;;) |
4608 | { | |
4609 | if (group_name->ts.type != BT_UNKNOWN) | |
4610 | { | |
4611 | gfc_error ("Namelist group name '%s' at %C already has a basic " | |
4612 | "type of %s", group_name->name, | |
4613 | gfc_typename (&group_name->ts)); | |
4614 | return MATCH_ERROR; | |
4615 | } | |
6de9cd9a | 4616 | |
8c6a85e3 TB |
4617 | if (group_name->attr.flavor == FL_NAMELIST |
4618 | && group_name->attr.use_assoc | |
4619 | && gfc_notify_std (GFC_STD_GNU, "Namelist group name '%s' " | |
4620 | "at %C already is USE associated and can" | |
4621 | "not be respecified.", group_name->name) | |
4622 | == FAILURE) | |
4623 | return MATCH_ERROR; | |
6de9cd9a | 4624 | |
8c6a85e3 TB |
4625 | if (group_name->attr.flavor != FL_NAMELIST |
4626 | && gfc_add_flavor (&group_name->attr, FL_NAMELIST, | |
4627 | group_name->name, NULL) == FAILURE) | |
4628 | return MATCH_ERROR; | |
6de9cd9a | 4629 | |
8c6a85e3 TB |
4630 | for (;;) |
4631 | { | |
4632 | m = gfc_match_symbol (&sym, 1); | |
4633 | if (m == MATCH_NO) | |
4634 | goto syntax; | |
4635 | if (m == MATCH_ERROR) | |
4636 | goto error; | |
6de9cd9a | 4637 | |
8c6a85e3 TB |
4638 | if (sym->attr.in_namelist == 0 |
4639 | && gfc_add_in_namelist (&sym->attr, sym->name, NULL) == FAILURE) | |
4640 | goto error; | |
6de9cd9a | 4641 | |
8c6a85e3 TB |
4642 | /* Use gfc_error_check here, rather than goto error, so that |
4643 | these are the only errors for the next two lines. */ | |
4644 | if (sym->as && sym->as->type == AS_ASSUMED_SIZE) | |
4645 | { | |
4646 | gfc_error ("Assumed size array '%s' in namelist '%s' at " | |
4647 | "%C is not allowed", sym->name, group_name->name); | |
4648 | gfc_error_check (); | |
4649 | } | |
6de9cd9a | 4650 | |
8c6a85e3 TB |
4651 | nl = gfc_get_namelist (); |
4652 | nl->sym = sym; | |
4653 | sym->refs++; | |
6de9cd9a | 4654 | |
8c6a85e3 TB |
4655 | if (group_name->namelist == NULL) |
4656 | group_name->namelist = group_name->namelist_tail = nl; | |
4657 | else | |
4658 | { | |
4659 | group_name->namelist_tail->next = nl; | |
4660 | group_name->namelist_tail = nl; | |
4661 | } | |
6de9cd9a | 4662 | |
8c6a85e3 TB |
4663 | if (gfc_match_eos () == MATCH_YES) |
4664 | goto done; | |
6de9cd9a | 4665 | |
8c6a85e3 | 4666 | m = gfc_match_char (','); |
6de9cd9a | 4667 | |
8c6a85e3 TB |
4668 | if (gfc_match_char ('/') == MATCH_YES) |
4669 | { | |
4670 | m2 = gfc_match (" %s /", &group_name); | |
4671 | if (m2 == MATCH_YES) | |
4672 | break; | |
4673 | if (m2 == MATCH_ERROR) | |
4674 | goto error; | |
4675 | goto syntax; | |
4676 | } | |
6de9cd9a | 4677 | |
8c6a85e3 TB |
4678 | if (m != MATCH_YES) |
4679 | goto syntax; | |
6de9cd9a DN |
4680 | } |
4681 | } | |
4682 | ||
8c6a85e3 | 4683 | done: |
6de9cd9a DN |
4684 | return MATCH_YES; |
4685 | ||
8c6a85e3 TB |
4686 | syntax: |
4687 | gfc_syntax_error (ST_NAMELIST); | |
6de9cd9a | 4688 | |
8c6a85e3 | 4689 | error: |
6de9cd9a DN |
4690 | return MATCH_ERROR; |
4691 | } | |
4692 | ||
4693 | ||
8c6a85e3 | 4694 | /* Match a MODULE statement. */ |
6de9cd9a | 4695 | |
8c6a85e3 TB |
4696 | match |
4697 | gfc_match_module (void) | |
6de9cd9a | 4698 | { |
6de9cd9a DN |
4699 | match m; |
4700 | ||
8c6a85e3 | 4701 | m = gfc_match (" %s%t", &gfc_new_block); |
6de9cd9a DN |
4702 | if (m != MATCH_YES) |
4703 | return m; | |
4704 | ||
8c6a85e3 TB |
4705 | if (gfc_add_flavor (&gfc_new_block->attr, FL_MODULE, |
4706 | gfc_new_block->name, NULL) == FAILURE) | |
4707 | return MATCH_ERROR; | |
6de9cd9a | 4708 | |
8c6a85e3 | 4709 | return MATCH_YES; |
6de9cd9a DN |
4710 | } |
4711 | ||
4712 | ||
8c6a85e3 TB |
4713 | /* Free equivalence sets and lists. Recursively is the easiest way to |
4714 | do this. */ | |
6de9cd9a | 4715 | |
8c6a85e3 TB |
4716 | void |
4717 | gfc_free_equiv_until (gfc_equiv *eq, gfc_equiv *stop) | |
6de9cd9a | 4718 | { |
8c6a85e3 TB |
4719 | if (eq == stop) |
4720 | return; | |
6de9cd9a | 4721 | |
8c6a85e3 TB |
4722 | gfc_free_equiv (eq->eq); |
4723 | gfc_free_equiv_until (eq->next, stop); | |
4724 | gfc_free_expr (eq->expr); | |
4725 | free (eq); | |
4726 | } | |
6de9cd9a | 4727 | |
6de9cd9a | 4728 | |
8c6a85e3 TB |
4729 | void |
4730 | gfc_free_equiv (gfc_equiv *eq) | |
4731 | { | |
4732 | gfc_free_equiv_until (eq, NULL); | |
6de9cd9a DN |
4733 | } |
4734 | ||
4735 | ||
8c6a85e3 | 4736 | /* Match an EQUIVALENCE statement. */ |
7431bf06 | 4737 | |
8c6a85e3 TB |
4738 | match |
4739 | gfc_match_equivalence (void) | |
7431bf06 | 4740 | { |
8c6a85e3 TB |
4741 | gfc_equiv *eq, *set, *tail; |
4742 | gfc_ref *ref; | |
4743 | gfc_symbol *sym; | |
4744 | match m; | |
4745 | gfc_common_head *common_head = NULL; | |
4746 | bool common_flag; | |
4747 | int cnt; | |
7431bf06 | 4748 | |
8c6a85e3 | 4749 | tail = NULL; |
7431bf06 | 4750 | |
8c6a85e3 TB |
4751 | for (;;) |
4752 | { | |
4753 | eq = gfc_get_equiv (); | |
4754 | if (tail == NULL) | |
4755 | tail = eq; | |
7431bf06 | 4756 | |
8c6a85e3 TB |
4757 | eq->next = gfc_current_ns->equiv; |
4758 | gfc_current_ns->equiv = eq; | |
7431bf06 | 4759 | |
8c6a85e3 TB |
4760 | if (gfc_match_char ('(') != MATCH_YES) |
4761 | goto syntax; | |
7431bf06 | 4762 | |
8c6a85e3 TB |
4763 | set = eq; |
4764 | common_flag = FALSE; | |
4765 | cnt = 0; | |
7431bf06 | 4766 | |
8c6a85e3 TB |
4767 | for (;;) |
4768 | { | |
4769 | m = gfc_match_equiv_variable (&set->expr); | |
4770 | if (m == MATCH_ERROR) | |
4771 | goto cleanup; | |
4772 | if (m == MATCH_NO) | |
4773 | goto syntax; | |
3e78238a | 4774 | |
8c6a85e3 TB |
4775 | /* count the number of objects. */ |
4776 | cnt++; | |
4777 | ||
4778 | if (gfc_match_char ('%') == MATCH_YES) | |
4779 | { | |
4780 | gfc_error ("Derived type component %C is not a " | |
4781 | "permitted EQUIVALENCE member"); | |
4782 | goto cleanup; | |
4783 | } | |
7431bf06 | 4784 | |
8c6a85e3 TB |
4785 | for (ref = set->expr->ref; ref; ref = ref->next) |
4786 | if (ref->type == REF_ARRAY && ref->u.ar.type == AR_SECTION) | |
4787 | { | |
4788 | gfc_error ("Array reference in EQUIVALENCE at %C cannot " | |
4789 | "be an array section"); | |
4790 | goto cleanup; | |
4791 | } | |
7431bf06 | 4792 | |
8c6a85e3 | 4793 | sym = set->expr->symtree->n.sym; |
cf2b3c22 | 4794 | |
8c6a85e3 TB |
4795 | if (gfc_add_in_equivalence (&sym->attr, sym->name, NULL) == FAILURE) |
4796 | goto cleanup; | |
cf2b3c22 | 4797 | |
8c6a85e3 TB |
4798 | if (sym->attr.in_common) |
4799 | { | |
4800 | common_flag = TRUE; | |
4801 | common_head = sym->common_head; | |
4802 | } | |
4803 | ||
4804 | if (gfc_match_char (')') == MATCH_YES) | |
4805 | break; | |
cf2b3c22 | 4806 | |
8c6a85e3 TB |
4807 | if (gfc_match_char (',') != MATCH_YES) |
4808 | goto syntax; | |
cf2b3c22 | 4809 | |
8c6a85e3 TB |
4810 | set->eq = gfc_get_equiv (); |
4811 | set = set->eq; | |
4812 | } | |
93d76687 | 4813 | |
8c6a85e3 | 4814 | if (cnt < 2) |
bc382218 | 4815 | { |
8c6a85e3 | 4816 | gfc_error ("EQUIVALENCE at %C requires two or more objects"); |
bc382218 JW |
4817 | goto cleanup; |
4818 | } | |
cf2b3c22 | 4819 | |
8c6a85e3 TB |
4820 | /* If one of the members of an equivalence is in common, then |
4821 | mark them all as being in common. Before doing this, check | |
4822 | that members of the equivalence group are not in different | |
4823 | common blocks. */ | |
4824 | if (common_flag) | |
4825 | for (set = eq; set; set = set->eq) | |
4826 | { | |
4827 | sym = set->expr->symtree->n.sym; | |
4828 | if (sym->common_head && sym->common_head != common_head) | |
4829 | { | |
4830 | gfc_error ("Attempt to indirectly overlap COMMON " | |
4831 | "blocks %s and %s by EQUIVALENCE at %C", | |
4832 | sym->common_head->name, common_head->name); | |
4833 | goto cleanup; | |
4834 | } | |
4835 | sym->attr.in_common = 1; | |
4836 | sym->common_head = common_head; | |
4837 | } | |
cf2b3c22 | 4838 | |
8c6a85e3 TB |
4839 | if (gfc_match_eos () == MATCH_YES) |
4840 | break; | |
4841 | if (gfc_match_char (',') != MATCH_YES) | |
4842 | { | |
4843 | gfc_error ("Expecting a comma in EQUIVALENCE at %C"); | |
4844 | goto cleanup; | |
4845 | } | |
cf2b3c22 TB |
4846 | } |
4847 | ||
8c6a85e3 | 4848 | return MATCH_YES; |
cf2b3c22 | 4849 | |
8c6a85e3 TB |
4850 | syntax: |
4851 | gfc_syntax_error (ST_EQUIVALENCE); | |
cf2b3c22 | 4852 | |
bc382218 | 4853 | cleanup: |
8c6a85e3 TB |
4854 | eq = tail->next; |
4855 | tail->next = NULL; | |
4856 | ||
4857 | gfc_free_equiv (gfc_current_ns->equiv); | |
4858 | gfc_current_ns->equiv = eq; | |
4859 | ||
4860 | return MATCH_ERROR; | |
cf2b3c22 TB |
4861 | } |
4862 | ||
4863 | ||
8c6a85e3 TB |
4864 | /* Check that a statement function is not recursive. This is done by looking |
4865 | for the statement function symbol(sym) by looking recursively through its | |
4866 | expression(e). If a reference to sym is found, true is returned. | |
4867 | 12.5.4 requires that any variable of function that is implicitly typed | |
4868 | shall have that type confirmed by any subsequent type declaration. The | |
4869 | implicit typing is conveniently done here. */ | |
4870 | static bool | |
4871 | recursive_stmt_fcn (gfc_expr *, gfc_symbol *); | |
6de9cd9a | 4872 | |
8c6a85e3 TB |
4873 | static bool |
4874 | check_stmt_fcn (gfc_expr *e, gfc_symbol *sym, int *f ATTRIBUTE_UNUSED) | |
6de9cd9a | 4875 | { |
6de9cd9a | 4876 | |
8c6a85e3 TB |
4877 | if (e == NULL) |
4878 | return false; | |
6de9cd9a | 4879 | |
8c6a85e3 | 4880 | switch (e->expr_type) |
6de9cd9a | 4881 | { |
8c6a85e3 TB |
4882 | case EXPR_FUNCTION: |
4883 | if (e->symtree == NULL) | |
4884 | return false; | |
6de9cd9a | 4885 | |
8c6a85e3 TB |
4886 | /* Check the name before testing for nested recursion! */ |
4887 | if (sym->name == e->symtree->n.sym->name) | |
4888 | return true; | |
6de9cd9a | 4889 | |
8c6a85e3 TB |
4890 | /* Catch recursion via other statement functions. */ |
4891 | if (e->symtree->n.sym->attr.proc == PROC_ST_FUNCTION | |
4892 | && e->symtree->n.sym->value | |
4893 | && recursive_stmt_fcn (e->symtree->n.sym->value, sym)) | |
4894 | return true; | |
6de9cd9a | 4895 | |
8c6a85e3 TB |
4896 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) |
4897 | gfc_set_default_type (e->symtree->n.sym, 0, NULL); | |
6de9cd9a | 4898 | |
8c6a85e3 | 4899 | break; |
6de9cd9a | 4900 | |
8c6a85e3 TB |
4901 | case EXPR_VARIABLE: |
4902 | if (e->symtree && sym->name == e->symtree->n.sym->name) | |
4903 | return true; | |
6de9cd9a | 4904 | |
8c6a85e3 TB |
4905 | if (e->symtree->n.sym->ts.type == BT_UNKNOWN) |
4906 | gfc_set_default_type (e->symtree->n.sym, 0, NULL); | |
4907 | break; | |
6de9cd9a | 4908 | |
8c6a85e3 TB |
4909 | default: |
4910 | break; | |
6de9cd9a DN |
4911 | } |
4912 | ||
8c6a85e3 TB |
4913 | return false; |
4914 | } | |
6de9cd9a | 4915 | |
6de9cd9a | 4916 | |
8c6a85e3 TB |
4917 | static bool |
4918 | recursive_stmt_fcn (gfc_expr *e, gfc_symbol *sym) | |
4919 | { | |
4920 | return gfc_traverse_expr (e, sym, check_stmt_fcn, 0); | |
6de9cd9a DN |
4921 | } |
4922 | ||
cf2b3c22 | 4923 | |
8c6a85e3 TB |
4924 | /* Match a statement function declaration. It is so easy to match |
4925 | non-statement function statements with a MATCH_ERROR as opposed to | |
4926 | MATCH_NO that we suppress error message in most cases. */ | |
cf2b3c22 TB |
4927 | |
4928 | match | |
8c6a85e3 | 4929 | gfc_match_st_function (void) |
cf2b3c22 | 4930 | { |
8c6a85e3 TB |
4931 | gfc_error_buf old_error; |
4932 | gfc_symbol *sym; | |
4933 | gfc_expr *expr; | |
cf2b3c22 | 4934 | match m; |
cf2b3c22 | 4935 | |
8c6a85e3 TB |
4936 | m = gfc_match_symbol (&sym, 0); |
4937 | if (m != MATCH_YES) | |
4938 | return m; | |
4939 | ||
4940 | gfc_push_error (&old_error); | |
4941 | ||
4942 | if (gfc_add_procedure (&sym->attr, PROC_ST_FUNCTION, | |
4943 | sym->name, NULL) == FAILURE) | |
4944 | goto undo_error; | |
4945 | ||
4946 | if (gfc_match_formal_arglist (sym, 1, 0) != MATCH_YES) | |
4947 | goto undo_error; | |
4948 | ||
4949 | m = gfc_match (" = %e%t", &expr); | |
4950 | if (m == MATCH_NO) | |
4951 | goto undo_error; | |
4952 | ||
4953 | gfc_free_error (&old_error); | |
4954 | if (m == MATCH_ERROR) | |
4955 | return m; | |
4956 | ||
4957 | if (recursive_stmt_fcn (expr, sym)) | |
cf2b3c22 | 4958 | { |
8c6a85e3 | 4959 | gfc_error ("Statement function at %L is recursive", &expr->where); |
cf2b3c22 TB |
4960 | return MATCH_ERROR; |
4961 | } | |
4962 | ||
8c6a85e3 | 4963 | sym->value = expr; |
cf2b3c22 | 4964 | |
8c6a85e3 TB |
4965 | if (gfc_notify_std (GFC_STD_F95_OBS, "Obsolescent feature: " |
4966 | "Statement function at %C") == FAILURE) | |
4967 | return MATCH_ERROR; | |
cf2b3c22 | 4968 | |
8c6a85e3 | 4969 | return MATCH_YES; |
cf2b3c22 | 4970 | |
8c6a85e3 TB |
4971 | undo_error: |
4972 | gfc_pop_error (&old_error); | |
4973 | return MATCH_NO; | |
4974 | } | |
cf2b3c22 | 4975 | |
cf2b3c22 | 4976 | |
8c6a85e3 TB |
4977 | /***************** SELECT CASE subroutines ******************/ |
4978 | ||
4979 | /* Free a single case structure. */ | |
4980 | ||
4981 | static void | |
4982 | free_case (gfc_case *p) | |
4983 | { | |
4984 | if (p->low == p->high) | |
4985 | p->high = NULL; | |
4986 | gfc_free_expr (p->low); | |
4987 | gfc_free_expr (p->high); | |
4988 | free (p); | |
4989 | } | |
cf2b3c22 | 4990 | |
cf2b3c22 | 4991 | |
8c6a85e3 | 4992 | /* Free a list of case structures. */ |
cf2b3c22 | 4993 | |
8c6a85e3 TB |
4994 | void |
4995 | gfc_free_case_list (gfc_case *p) | |
4996 | { | |
4997 | gfc_case *q; | |
cf2b3c22 | 4998 | |
8c6a85e3 TB |
4999 | for (; p; p = q) |
5000 | { | |
5001 | q = p->next; | |
5002 | free_case (p); | |
5003 | } | |
cf2b3c22 TB |
5004 | } |
5005 | ||
5006 | ||
8c6a85e3 | 5007 | /* Match a single case selector. */ |
cf2b3c22 | 5008 | |
8c6a85e3 TB |
5009 | static match |
5010 | match_case_selector (gfc_case **cp) | |
cf2b3c22 | 5011 | { |
8c6a85e3 | 5012 | gfc_case *c; |
cf2b3c22 TB |
5013 | match m; |
5014 | ||
8c6a85e3 TB |
5015 | c = gfc_get_case (); |
5016 | c->where = gfc_current_locus; | |
cf2b3c22 | 5017 | |
8c6a85e3 | 5018 | if (gfc_match_char (':') == MATCH_YES) |
cf2b3c22 | 5019 | { |
8c6a85e3 | 5020 | m = gfc_match_init_expr (&c->high); |
cf2b3c22 | 5021 | if (m == MATCH_NO) |
8c6a85e3 TB |
5022 | goto need_expr; |
5023 | if (m == MATCH_ERROR) | |
5024 | goto cleanup; | |
5025 | } | |
5026 | else | |
5027 | { | |
5028 | m = gfc_match_init_expr (&c->low); | |
cf2b3c22 TB |
5029 | if (m == MATCH_ERROR) |
5030 | goto cleanup; | |
8c6a85e3 TB |
5031 | if (m == MATCH_NO) |
5032 | goto need_expr; | |
cf2b3c22 | 5033 | |
8c6a85e3 TB |
5034 | /* If we're not looking at a ':' now, make a range out of a single |
5035 | target. Else get the upper bound for the case range. */ | |
5036 | if (gfc_match_char (':') != MATCH_YES) | |
5037 | c->high = c->low; | |
5038 | else | |
5039 | { | |
5040 | m = gfc_match_init_expr (&c->high); | |
5041 | if (m == MATCH_ERROR) | |
5042 | goto cleanup; | |
5043 | /* MATCH_NO is fine. It's OK if nothing is there! */ | |
5044 | } | |
cf2b3c22 TB |
5045 | } |
5046 | ||
8c6a85e3 TB |
5047 | *cp = c; |
5048 | return MATCH_YES; | |
cf2b3c22 | 5049 | |
8c6a85e3 TB |
5050 | need_expr: |
5051 | gfc_error ("Expected initialization expression in CASE at %C"); | |
cf2b3c22 | 5052 | |
8c6a85e3 TB |
5053 | cleanup: |
5054 | free_case (c); | |
5055 | return MATCH_ERROR; | |
5056 | } | |
cf2b3c22 | 5057 | |
cf2b3c22 | 5058 | |
8c6a85e3 | 5059 | /* Match the end of a case statement. */ |
cf2b3c22 | 5060 | |
8c6a85e3 TB |
5061 | static match |
5062 | match_case_eos (void) | |
5063 | { | |
5064 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5065 | match m; | |
cf2b3c22 | 5066 | |
8c6a85e3 TB |
5067 | if (gfc_match_eos () == MATCH_YES) |
5068 | return MATCH_YES; | |
cf2b3c22 | 5069 | |
8c6a85e3 TB |
5070 | /* If the case construct doesn't have a case-construct-name, we |
5071 | should have matched the EOS. */ | |
5072 | if (!gfc_current_block ()) | |
5073 | return MATCH_NO; | |
cf2b3c22 | 5074 | |
8c6a85e3 | 5075 | gfc_gobble_whitespace (); |
cf2b3c22 | 5076 | |
8c6a85e3 TB |
5077 | m = gfc_match_name (name); |
5078 | if (m != MATCH_YES) | |
5079 | return m; | |
cf2b3c22 | 5080 | |
8c6a85e3 TB |
5081 | if (strcmp (name, gfc_current_block ()->name) != 0) |
5082 | { | |
5083 | gfc_error ("Expected block name '%s' of SELECT construct at %C", | |
5084 | gfc_current_block ()->name); | |
5085 | return MATCH_ERROR; | |
5086 | } | |
cf2b3c22 | 5087 | |
8c6a85e3 TB |
5088 | return gfc_match_eos (); |
5089 | } | |
cf2b3c22 | 5090 | |
6de9cd9a | 5091 | |
8c6a85e3 | 5092 | /* Match a SELECT statement. */ |
c874ae73 | 5093 | |
8c6a85e3 TB |
5094 | match |
5095 | gfc_match_select (void) | |
c874ae73 TS |
5096 | { |
5097 | gfc_expr *expr; | |
c874ae73 TS |
5098 | match m; |
5099 | ||
8c6a85e3 TB |
5100 | m = gfc_match_label (); |
5101 | if (m == MATCH_ERROR) | |
5102 | return m; | |
5103 | ||
5104 | m = gfc_match (" select case ( %e )%t", &expr); | |
c874ae73 TS |
5105 | if (m != MATCH_YES) |
5106 | return m; | |
5107 | ||
8c6a85e3 TB |
5108 | new_st.op = EXEC_SELECT; |
5109 | new_st.expr1 = expr; | |
c874ae73 | 5110 | |
8c6a85e3 TB |
5111 | return MATCH_YES; |
5112 | } | |
c874ae73 | 5113 | |
c874ae73 | 5114 | |
8f75db9f PT |
5115 | /* Transfer the selector typespec to the associate name. */ |
5116 | ||
5117 | static void | |
5118 | copy_ts_from_selector_to_associate (gfc_expr *associate, gfc_expr *selector) | |
5119 | { | |
5120 | gfc_ref *ref; | |
5121 | gfc_symbol *assoc_sym; | |
5122 | ||
5123 | assoc_sym = associate->symtree->n.sym; | |
5124 | ||
5125 | /* Ensure that any array reference is resolved. */ | |
5126 | gfc_resolve_expr (selector); | |
5127 | ||
5128 | /* At this stage the expression rank and arrayspec dimensions have | |
5129 | not been completely sorted out. We must get the expr2->rank | |
5130 | right here, so that the correct class container is obtained. */ | |
5131 | ref = selector->ref; | |
5132 | while (ref && ref->next) | |
5133 | ref = ref->next; | |
5134 | ||
5135 | if (selector->ts.type == BT_CLASS | |
5136 | && CLASS_DATA (selector)->as | |
5137 | && ref && ref->type == REF_ARRAY) | |
5138 | { | |
5139 | if (ref->u.ar.type == AR_FULL) | |
5140 | selector->rank = CLASS_DATA (selector)->as->rank; | |
5141 | else if (ref->u.ar.type == AR_SECTION) | |
5142 | selector->rank = ref->u.ar.dimen; | |
5143 | else | |
5144 | selector->rank = 0; | |
5145 | } | |
5146 | ||
5147 | if (selector->ts.type != BT_CLASS) | |
5148 | { | |
5149 | /* The correct class container has to be available. */ | |
5150 | if (selector->rank) | |
5151 | { | |
5152 | assoc_sym->attr.dimension = 1; | |
5153 | assoc_sym->as = gfc_get_array_spec (); | |
5154 | assoc_sym->as->rank = selector->rank; | |
5155 | assoc_sym->as->type = AS_DEFERRED; | |
5156 | } | |
5157 | else | |
5158 | assoc_sym->as = NULL; | |
5159 | ||
5160 | assoc_sym->ts.type = BT_CLASS; | |
5161 | assoc_sym->ts.u.derived = selector->ts.u.derived; | |
5162 | assoc_sym->attr.pointer = 1; | |
5163 | gfc_build_class_symbol (&assoc_sym->ts, &assoc_sym->attr, | |
5164 | &assoc_sym->as, false); | |
5165 | } | |
5166 | else | |
5167 | { | |
5168 | /* The correct class container has to be available. */ | |
5169 | if (selector->rank) | |
5170 | { | |
5171 | assoc_sym->attr.dimension = 1; | |
5172 | assoc_sym->as = gfc_get_array_spec (); | |
5173 | assoc_sym->as->rank = selector->rank; | |
5174 | assoc_sym->as->type = AS_DEFERRED; | |
5175 | } | |
5176 | else | |
5177 | assoc_sym->as = NULL; | |
5178 | assoc_sym->ts.type = BT_CLASS; | |
5179 | assoc_sym->ts.u.derived = CLASS_DATA (selector)->ts.u.derived; | |
5180 | assoc_sym->attr.pointer = 1; | |
5181 | gfc_build_class_symbol (&assoc_sym->ts, &assoc_sym->attr, | |
5182 | &assoc_sym->as, false); | |
5183 | } | |
5184 | } | |
5185 | ||
5186 | ||
8c6a85e3 | 5187 | /* Push the current selector onto the SELECT TYPE stack. */ |
c874ae73 | 5188 | |
8c6a85e3 TB |
5189 | static void |
5190 | select_type_push (gfc_symbol *sel) | |
5191 | { | |
5192 | gfc_select_type_stack *top = gfc_get_select_type_stack (); | |
5193 | top->selector = sel; | |
5194 | top->tmp = NULL; | |
5195 | top->prev = select_type_stack; | |
c874ae73 | 5196 | |
8c6a85e3 TB |
5197 | select_type_stack = top; |
5198 | } | |
c874ae73 | 5199 | |
c874ae73 | 5200 | |
8f75db9f | 5201 | /* Set the temporary for the current derived type SELECT TYPE selector. */ |
c874ae73 | 5202 | |
8f75db9f PT |
5203 | static gfc_symtree * |
5204 | select_derived_set_tmp (gfc_typespec *ts) | |
8c6a85e3 TB |
5205 | { |
5206 | char name[GFC_MAX_SYMBOL_LEN]; | |
5207 | gfc_symtree *tmp; | |
5208 | ||
8f75db9f PT |
5209 | sprintf (name, "__tmp_type_%s", ts->u.derived->name); |
5210 | gfc_get_sym_tree (name, gfc_current_ns, &tmp, false); | |
5211 | gfc_add_type (tmp->n.sym, ts, NULL); | |
5212 | ||
5213 | /* Copy across the array spec to the selector. */ | |
5214 | if (select_type_stack->selector->ts.type == BT_CLASS | |
5215 | && select_type_stack->selector->attr.class_ok | |
5216 | && (CLASS_DATA (select_type_stack->selector)->attr.dimension | |
5217 | || CLASS_DATA (select_type_stack->selector)->attr.codimension)) | |
8c6a85e3 | 5218 | { |
8f75db9f PT |
5219 | tmp->n.sym->attr.dimension |
5220 | = CLASS_DATA (select_type_stack->selector)->attr.dimension; | |
5221 | tmp->n.sym->attr.codimension | |
5222 | = CLASS_DATA (select_type_stack->selector)->attr.codimension; | |
5223 | tmp->n.sym->as | |
5224 | = gfc_copy_array_spec (CLASS_DATA (select_type_stack->selector)->as); | |
8c6a85e3 | 5225 | } |
8f75db9f PT |
5226 | |
5227 | gfc_set_sym_referenced (tmp->n.sym); | |
5228 | gfc_add_flavor (&tmp->n.sym->attr, FL_VARIABLE, name, NULL); | |
5229 | tmp->n.sym->attr.select_type_temporary = 1; | |
5230 | ||
5231 | return tmp; | |
5232 | } | |
5233 | ||
5234 | ||
5235 | /* Set the temporary for the current class SELECT TYPE selector. */ | |
5236 | ||
5237 | static gfc_symtree * | |
5238 | select_class_set_tmp (gfc_typespec *ts) | |
5239 | { | |
5240 | char name[GFC_MAX_SYMBOL_LEN]; | |
5241 | gfc_symtree *tmp; | |
8c6a85e3 | 5242 | |
8f75db9f PT |
5243 | if (select_type_stack->selector->ts.type == BT_CLASS |
5244 | && !select_type_stack->selector->attr.class_ok) | |
5245 | return NULL; | |
8c6a85e3 | 5246 | |
8f75db9f | 5247 | sprintf (name, "__tmp_class_%s", ts->u.derived->name); |
8c6a85e3 TB |
5248 | gfc_get_sym_tree (name, gfc_current_ns, &tmp, false); |
5249 | gfc_add_type (tmp->n.sym, ts, NULL); | |
c49ea23d | 5250 | |
8f75db9f | 5251 | /* Copy across the array spec to the selector. */ |
cd99c23c | 5252 | if (select_type_stack->selector->ts.type == BT_CLASS |
cd99c23c TB |
5253 | && (CLASS_DATA (select_type_stack->selector)->attr.dimension |
5254 | || CLASS_DATA (select_type_stack->selector)->attr.codimension)) | |
c49ea23d | 5255 | { |
8f75db9f PT |
5256 | tmp->n.sym->attr.pointer = 1; |
5257 | tmp->n.sym->attr.dimension | |
cd99c23c | 5258 | = CLASS_DATA (select_type_stack->selector)->attr.dimension; |
8f75db9f | 5259 | tmp->n.sym->attr.codimension |
cd99c23c | 5260 | = CLASS_DATA (select_type_stack->selector)->attr.codimension; |
8f75db9f PT |
5261 | tmp->n.sym->as |
5262 | = gfc_copy_array_spec (CLASS_DATA (select_type_stack->selector)->as); | |
c49ea23d PT |
5263 | } |
5264 | ||
8c6a85e3 | 5265 | gfc_set_sym_referenced (tmp->n.sym); |
8c6a85e3 | 5266 | gfc_add_flavor (&tmp->n.sym->attr, FL_VARIABLE, name, NULL); |
7d40e49f | 5267 | tmp->n.sym->attr.select_type_temporary = 1; |
8f75db9f PT |
5268 | gfc_build_class_symbol (&tmp->n.sym->ts, &tmp->n.sym->attr, |
5269 | &tmp->n.sym->as, false); | |
5270 | ||
5271 | return tmp; | |
5272 | } | |
5273 | ||
5274 | ||
5275 | static void | |
5276 | select_type_set_tmp (gfc_typespec *ts) | |
5277 | { | |
5278 | gfc_symtree *tmp; | |
5279 | ||
5280 | if (!ts) | |
5281 | { | |
5282 | select_type_stack->tmp = NULL; | |
5283 | return; | |
5284 | } | |
5285 | ||
5286 | if (!gfc_type_is_extensible (ts->u.derived)) | |
5287 | return; | |
5288 | ||
5289 | /* Logic is a LOT clearer with separate functions for class and derived | |
5290 | type temporaries! There are not many more lines of code either. */ | |
8c6a85e3 | 5291 | if (ts->type == BT_CLASS) |
8f75db9f PT |
5292 | tmp = select_class_set_tmp (ts); |
5293 | else | |
5294 | tmp = select_derived_set_tmp (ts); | |
5295 | ||
5296 | if (tmp == NULL) | |
5297 | return; | |
8c6a85e3 TB |
5298 | |
5299 | /* Add an association for it, so the rest of the parser knows it is | |
5300 | an associate-name. The target will be set during resolution. */ | |
5301 | tmp->n.sym->assoc = gfc_get_association_list (); | |
5302 | tmp->n.sym->assoc->dangling = 1; | |
5303 | tmp->n.sym->assoc->st = tmp; | |
5304 | ||
5305 | select_type_stack->tmp = tmp; | |
c874ae73 TS |
5306 | } |
5307 | ||
8f75db9f | 5308 | |
8c6a85e3 | 5309 | /* Match a SELECT TYPE statement. */ |
6de9cd9a DN |
5310 | |
5311 | match | |
8c6a85e3 | 5312 | gfc_match_select_type (void) |
6de9cd9a | 5313 | { |
8c6a85e3 TB |
5314 | gfc_expr *expr1, *expr2 = NULL; |
5315 | match m; | |
5316 | char name[GFC_MAX_SYMBOL_LEN]; | |
c49ea23d | 5317 | bool class_array; |
8f75db9f | 5318 | gfc_symbol *sym; |
6de9cd9a | 5319 | |
8c6a85e3 TB |
5320 | m = gfc_match_label (); |
5321 | if (m == MATCH_ERROR) | |
5322 | return m; | |
6de9cd9a | 5323 | |
8c6a85e3 | 5324 | m = gfc_match (" select type ( "); |
6de9cd9a DN |
5325 | if (m != MATCH_YES) |
5326 | return m; | |
5327 | ||
8c6a85e3 TB |
5328 | gfc_current_ns = gfc_build_block_ns (gfc_current_ns); |
5329 | ||
5330 | m = gfc_match (" %n => %e", name, &expr2); | |
5331 | if (m == MATCH_YES) | |
5332 | { | |
5333 | expr1 = gfc_get_expr(); | |
5334 | expr1->expr_type = EXPR_VARIABLE; | |
5335 | if (gfc_get_sym_tree (name, NULL, &expr1->symtree, false)) | |
5336 | { | |
5337 | m = MATCH_ERROR; | |
5338 | goto cleanup; | |
5339 | } | |
8f75db9f PT |
5340 | |
5341 | sym = expr1->symtree->n.sym; | |
8c6a85e3 | 5342 | if (expr2->ts.type == BT_UNKNOWN) |
8f75db9f | 5343 | sym->attr.untyped = 1; |
8c6a85e3 | 5344 | else |
8f75db9f PT |
5345 | copy_ts_from_selector_to_associate (expr1, expr2); |
5346 | ||
5347 | sym->attr.flavor = FL_VARIABLE; | |
5348 | sym->attr.referenced = 1; | |
5349 | sym->attr.class_ok = 1; | |
8c6a85e3 TB |
5350 | } |
5351 | else | |
6de9cd9a | 5352 | { |
8c6a85e3 TB |
5353 | m = gfc_match (" %e ", &expr1); |
5354 | if (m != MATCH_YES) | |
5355 | goto cleanup; | |
6de9cd9a DN |
5356 | } |
5357 | ||
8c6a85e3 | 5358 | m = gfc_match (" )%t"); |
6de9cd9a | 5359 | if (m != MATCH_YES) |
8c6a85e3 TB |
5360 | goto cleanup; |
5361 | ||
c49ea23d PT |
5362 | /* This ghastly expression seems to be needed to distinguish a CLASS |
5363 | array, which can have a reference, from other expressions that | |
5364 | have references, such as derived type components, and are not | |
5365 | allowed by the standard. | |
5366 | TODO; see is it is sufficent to exclude component and substring | |
5367 | references. */ | |
5368 | class_array = expr1->expr_type == EXPR_VARIABLE | |
5369 | && expr1->ts.type != BT_UNKNOWN | |
5370 | && CLASS_DATA (expr1) | |
5371 | && (strcmp (CLASS_DATA (expr1)->name, "_data") == 0) | |
cd99c23c TB |
5372 | && (CLASS_DATA (expr1)->attr.dimension |
5373 | || CLASS_DATA (expr1)->attr.codimension) | |
c49ea23d PT |
5374 | && expr1->ref |
5375 | && expr1->ref->type == REF_ARRAY | |
5376 | && expr1->ref->next == NULL; | |
5377 | ||
8c6a85e3 | 5378 | /* Check for F03:C811. */ |
c49ea23d PT |
5379 | if (!expr2 && (expr1->expr_type != EXPR_VARIABLE |
5380 | || (!class_array && expr1->ref != NULL))) | |
6de9cd9a | 5381 | { |
8c6a85e3 TB |
5382 | gfc_error ("Selector in SELECT TYPE at %C is not a named variable; " |
5383 | "use associate-name=>"); | |
5384 | m = MATCH_ERROR; | |
5385 | goto cleanup; | |
6de9cd9a DN |
5386 | } |
5387 | ||
8c6a85e3 TB |
5388 | new_st.op = EXEC_SELECT_TYPE; |
5389 | new_st.expr1 = expr1; | |
5390 | new_st.expr2 = expr2; | |
5391 | new_st.ext.block.ns = gfc_current_ns; | |
6de9cd9a | 5392 | |
8c6a85e3 | 5393 | select_type_push (expr1->symtree->n.sym); |
6de9cd9a DN |
5394 | |
5395 | return MATCH_YES; | |
8c6a85e3 TB |
5396 | |
5397 | cleanup: | |
5398 | gfc_current_ns = gfc_current_ns->parent; | |
5399 | return m; | |
6de9cd9a DN |
5400 | } |
5401 | ||
5402 | ||
8c6a85e3 | 5403 | /* Match a CASE statement. */ |
6de9cd9a DN |
5404 | |
5405 | match | |
8c6a85e3 | 5406 | gfc_match_case (void) |
6de9cd9a | 5407 | { |
8c6a85e3 | 5408 | gfc_case *c, *head, *tail; |
6de9cd9a DN |
5409 | match m; |
5410 | ||
8c6a85e3 TB |
5411 | head = tail = NULL; |
5412 | ||
5413 | if (gfc_current_state () != COMP_SELECT) | |
6de9cd9a | 5414 | { |
8c6a85e3 | 5415 | gfc_error ("Unexpected CASE statement at %C"); |
6de9cd9a DN |
5416 | return MATCH_ERROR; |
5417 | } | |
5418 | ||
8c6a85e3 | 5419 | if (gfc_match ("% default") == MATCH_YES) |
6de9cd9a | 5420 | { |
8c6a85e3 | 5421 | m = match_case_eos (); |
6de9cd9a DN |
5422 | if (m == MATCH_NO) |
5423 | goto syntax; | |
5424 | if (m == MATCH_ERROR) | |
8c6a85e3 | 5425 | goto cleanup; |
6de9cd9a | 5426 | |
8c6a85e3 TB |
5427 | new_st.op = EXEC_SELECT; |
5428 | c = gfc_get_case (); | |
5429 | c->where = gfc_current_locus; | |
5430 | new_st.ext.block.case_list = c; | |
5431 | return MATCH_YES; | |
6de9cd9a DN |
5432 | } |
5433 | ||
8c6a85e3 TB |
5434 | if (gfc_match_char ('(') != MATCH_YES) |
5435 | goto syntax; | |
5436 | ||
5437 | for (;;) | |
690af379 | 5438 | { |
8c6a85e3 | 5439 | if (match_case_selector (&c) == MATCH_ERROR) |
6de9cd9a DN |
5440 | goto cleanup; |
5441 | ||
8c6a85e3 TB |
5442 | if (head == NULL) |
5443 | head = c; | |
5444 | else | |
5445 | tail->next = c; | |
6de9cd9a | 5446 | |
8c6a85e3 TB |
5447 | tail = c; |
5448 | ||
5449 | if (gfc_match_char (')') == MATCH_YES) | |
5450 | break; | |
5451 | if (gfc_match_char (',') != MATCH_YES) | |
5452 | goto syntax; | |
6de9cd9a DN |
5453 | } |
5454 | ||
8c6a85e3 TB |
5455 | m = match_case_eos (); |
5456 | if (m == MATCH_NO) | |
5457 | goto syntax; | |
5458 | if (m == MATCH_ERROR) | |
5459 | goto cleanup; | |
5460 | ||
5461 | new_st.op = EXEC_SELECT; | |
5462 | new_st.ext.block.case_list = head; | |
5463 | ||
6de9cd9a DN |
5464 | return MATCH_YES; |
5465 | ||
5466 | syntax: | |
8c6a85e3 | 5467 | gfc_error ("Syntax error in CASE specification at %C"); |
6de9cd9a DN |
5468 | |
5469 | cleanup: | |
8c6a85e3 | 5470 | gfc_free_case_list (head); /* new_st is cleaned up in parse.c. */ |
6de9cd9a DN |
5471 | return MATCH_ERROR; |
5472 | } | |
5473 | ||
5474 | ||
8c6a85e3 | 5475 | /* Match a TYPE IS statement. */ |
6de9cd9a | 5476 | |
8c6a85e3 TB |
5477 | match |
5478 | gfc_match_type_is (void) | |
6de9cd9a | 5479 | { |
8c6a85e3 TB |
5480 | gfc_case *c = NULL; |
5481 | match m; | |
6de9cd9a | 5482 | |
8c6a85e3 | 5483 | if (gfc_current_state () != COMP_SELECT_TYPE) |
6de9cd9a | 5484 | { |
8c6a85e3 TB |
5485 | gfc_error ("Unexpected TYPE IS statement at %C"); |
5486 | return MATCH_ERROR; | |
6de9cd9a | 5487 | } |
6de9cd9a | 5488 | |
8c6a85e3 TB |
5489 | if (gfc_match_char ('(') != MATCH_YES) |
5490 | goto syntax; | |
6de9cd9a | 5491 | |
8c6a85e3 TB |
5492 | c = gfc_get_case (); |
5493 | c->where = gfc_current_locus; | |
6de9cd9a | 5494 | |
8c6a85e3 TB |
5495 | /* TODO: Once unlimited polymorphism is implemented, we will need to call |
5496 | match_type_spec here. */ | |
5497 | if (match_derived_type_spec (&c->ts) == MATCH_ERROR) | |
6de9cd9a DN |
5498 | goto cleanup; |
5499 | ||
8c6a85e3 | 5500 | if (gfc_match_char (')') != MATCH_YES) |
6de9cd9a DN |
5501 | goto syntax; |
5502 | ||
8c6a85e3 | 5503 | m = match_case_eos (); |
6de9cd9a DN |
5504 | if (m == MATCH_NO) |
5505 | goto syntax; | |
5506 | if (m == MATCH_ERROR) | |
5507 | goto cleanup; | |
5508 | ||
8c6a85e3 TB |
5509 | new_st.op = EXEC_SELECT_TYPE; |
5510 | new_st.ext.block.case_list = c; | |
6de9cd9a | 5511 | |
8c6a85e3 TB |
5512 | /* Create temporary variable. */ |
5513 | select_type_set_tmp (&c->ts); | |
31708dc6 | 5514 | |
6de9cd9a DN |
5515 | return MATCH_YES; |
5516 | ||
5517 | syntax: | |
8c6a85e3 | 5518 | gfc_error ("Syntax error in TYPE IS specification at %C"); |
6de9cd9a DN |
5519 | |
5520 | cleanup: | |
8c6a85e3 TB |
5521 | if (c != NULL) |
5522 | gfc_free_case_list (c); /* new_st is cleaned up in parse.c. */ | |
5523 | return MATCH_ERROR; | |
5524 | } | |
d68bd5a8 | 5525 | |
c874ae73 | 5526 | |
8c6a85e3 TB |
5527 | /* Match a CLASS IS or CLASS DEFAULT statement. */ |
5528 | ||
5529 | match | |
5530 | gfc_match_class_is (void) | |
5531 | { | |
5532 | gfc_case *c = NULL; | |
5533 | match m; | |
5534 | ||
5535 | if (gfc_current_state () != COMP_SELECT_TYPE) | |
5536 | return MATCH_NO; | |
5537 | ||
5538 | if (gfc_match ("% default") == MATCH_YES) | |
5539 | { | |
5540 | m = match_case_eos (); | |
6de9cd9a DN |
5541 | if (m == MATCH_NO) |
5542 | goto syntax; | |
5543 | if (m == MATCH_ERROR) | |
5544 | goto cleanup; | |
5545 | ||
8c6a85e3 TB |
5546 | new_st.op = EXEC_SELECT_TYPE; |
5547 | c = gfc_get_case (); | |
5548 | c->where = gfc_current_locus; | |
5549 | c->ts.type = BT_UNKNOWN; | |
5550 | new_st.ext.block.case_list = c; | |
5551 | select_type_set_tmp (NULL); | |
5552 | return MATCH_YES; | |
6de9cd9a DN |
5553 | } |
5554 | ||
8c6a85e3 TB |
5555 | m = gfc_match ("% is"); |
5556 | if (m == MATCH_NO) | |
6de9cd9a | 5557 | goto syntax; |
8c6a85e3 TB |
5558 | if (m == MATCH_ERROR) |
5559 | goto cleanup; | |
5560 | ||
5561 | if (gfc_match_char ('(') != MATCH_YES) | |
5562 | goto syntax; | |
5563 | ||
5564 | c = gfc_get_case (); | |
5565 | c->where = gfc_current_locus; | |
5566 | ||
5567 | if (match_derived_type_spec (&c->ts) == MATCH_ERROR) | |
5568 | goto cleanup; | |
5569 | ||
5570 | if (c->ts.type == BT_DERIVED) | |
5571 | c->ts.type = BT_CLASS; | |
5572 | ||
5573 | if (gfc_match_char (')') != MATCH_YES) | |
5574 | goto syntax; | |
5575 | ||
5576 | m = match_case_eos (); | |
5577 | if (m == MATCH_NO) | |
5578 | goto syntax; | |
5579 | if (m == MATCH_ERROR) | |
5580 | goto cleanup; | |
5581 | ||
5582 | new_st.op = EXEC_SELECT_TYPE; | |
5583 | new_st.ext.block.case_list = c; | |
5584 | ||
5585 | /* Create temporary variable. */ | |
5586 | select_type_set_tmp (&c->ts); | |
6de9cd9a | 5587 | |
c874ae73 TS |
5588 | return MATCH_YES; |
5589 | ||
5590 | syntax: | |
8c6a85e3 | 5591 | gfc_error ("Syntax error in CLASS IS specification at %C"); |
c874ae73 TS |
5592 | |
5593 | cleanup: | |
8c6a85e3 TB |
5594 | if (c != NULL) |
5595 | gfc_free_case_list (c); /* new_st is cleaned up in parse.c. */ | |
c874ae73 TS |
5596 | return MATCH_ERROR; |
5597 | } | |
5598 | ||
8c6a85e3 TB |
5599 | |
5600 | /********************* WHERE subroutines ********************/ | |
5601 | ||
5602 | /* Match the rest of a simple WHERE statement that follows an IF statement. | |
5603 | */ | |
c874ae73 TS |
5604 | |
5605 | static match | |
8c6a85e3 | 5606 | match_simple_where (void) |
c874ae73 | 5607 | { |
8c6a85e3 | 5608 | gfc_expr *expr; |
c874ae73 TS |
5609 | gfc_code *c; |
5610 | match m; | |
5611 | ||
8c6a85e3 | 5612 | m = gfc_match (" ( %e )", &expr); |
c874ae73 | 5613 | if (m != MATCH_YES) |
8c6a85e3 | 5614 | return m; |
c874ae73 TS |
5615 | |
5616 | m = gfc_match_assignment (); | |
8c6a85e3 TB |
5617 | if (m == MATCH_NO) |
5618 | goto syntax; | |
c874ae73 TS |
5619 | if (m == MATCH_ERROR) |
5620 | goto cleanup; | |
c874ae73 TS |
5621 | |
5622 | if (gfc_match_eos () != MATCH_YES) | |
5623 | goto syntax; | |
5624 | ||
8c6a85e3 TB |
5625 | c = gfc_get_code (); |
5626 | ||
5627 | c->op = EXEC_WHERE; | |
5628 | c->expr1 = expr; | |
5629 | c->next = gfc_get_code (); | |
5630 | ||
5631 | *c->next = new_st; | |
c874ae73 | 5632 | gfc_clear_new_st (); |
c874ae73 | 5633 | |
8c6a85e3 TB |
5634 | new_st.op = EXEC_WHERE; |
5635 | new_st.block = c; | |
c874ae73 TS |
5636 | |
5637 | return MATCH_YES; | |
5638 | ||
5639 | syntax: | |
8c6a85e3 | 5640 | gfc_syntax_error (ST_WHERE); |
c874ae73 TS |
5641 | |
5642 | cleanup: | |
8c6a85e3 | 5643 | gfc_free_expr (expr); |
c874ae73 TS |
5644 | return MATCH_ERROR; |
5645 | } | |
5646 | ||
5647 | ||
8c6a85e3 | 5648 | /* Match a WHERE statement. */ |
c874ae73 TS |
5649 | |
5650 | match | |
8c6a85e3 | 5651 | gfc_match_where (gfc_statement *st) |
c874ae73 | 5652 | { |
8c6a85e3 | 5653 | gfc_expr *expr; |
c874ae73 | 5654 | match m0, m; |
8c6a85e3 | 5655 | gfc_code *c; |
c874ae73 TS |
5656 | |
5657 | m0 = gfc_match_label (); | |
5658 | if (m0 == MATCH_ERROR) | |
8c6a85e3 | 5659 | return m0; |
c874ae73 | 5660 | |
8c6a85e3 | 5661 | m = gfc_match (" where ( %e )", &expr); |
c874ae73 TS |
5662 | if (m != MATCH_YES) |
5663 | return m; | |
5664 | ||
6de9cd9a DN |
5665 | if (gfc_match_eos () == MATCH_YES) |
5666 | { | |
8c6a85e3 TB |
5667 | *st = ST_WHERE_BLOCK; |
5668 | new_st.op = EXEC_WHERE; | |
5669 | new_st.expr1 = expr; | |
6de9cd9a DN |
5670 | return MATCH_YES; |
5671 | } | |
5672 | ||
5673 | m = gfc_match_assignment (); | |
6de9cd9a | 5674 | if (m == MATCH_NO) |
8c6a85e3 TB |
5675 | gfc_syntax_error (ST_WHERE); |
5676 | ||
5677 | if (m != MATCH_YES) | |
6de9cd9a | 5678 | { |
8c6a85e3 TB |
5679 | gfc_free_expr (expr); |
5680 | return MATCH_ERROR; | |
6de9cd9a DN |
5681 | } |
5682 | ||
8c6a85e3 TB |
5683 | /* We've got a simple WHERE statement. */ |
5684 | *st = ST_WHERE; | |
6de9cd9a | 5685 | c = gfc_get_code (); |
6de9cd9a | 5686 | |
8c6a85e3 TB |
5687 | c->op = EXEC_WHERE; |
5688 | c->expr1 = expr; | |
5689 | c->next = gfc_get_code (); | |
5690 | ||
5691 | *c->next = new_st; | |
6de9cd9a | 5692 | gfc_clear_new_st (); |
6de9cd9a | 5693 | |
8c6a85e3 TB |
5694 | new_st.op = EXEC_WHERE; |
5695 | new_st.block = c; | |
5696 | ||
5697 | return MATCH_YES; | |
5698 | } | |
5699 | ||
5700 | ||
5701 | /* Match an ELSEWHERE statement. We leave behind a WHERE node in | |
5702 | new_st if successful. */ | |
5703 | ||
5704 | match | |
5705 | gfc_match_elsewhere (void) | |
5706 | { | |
5707 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5708 | gfc_expr *expr; | |
5709 | match m; | |
5710 | ||
5711 | if (gfc_current_state () != COMP_WHERE) | |
5712 | { | |
5713 | gfc_error ("ELSEWHERE statement at %C not enclosed in WHERE block"); | |
5714 | return MATCH_ERROR; | |
5715 | } | |
5716 | ||
5717 | expr = NULL; | |
5718 | ||
5719 | if (gfc_match_char ('(') == MATCH_YES) | |
5720 | { | |
5721 | m = gfc_match_expr (&expr); | |
5722 | if (m == MATCH_NO) | |
5723 | goto syntax; | |
5724 | if (m == MATCH_ERROR) | |
5725 | return MATCH_ERROR; | |
5726 | ||
5727 | if (gfc_match_char (')') != MATCH_YES) | |
5728 | goto syntax; | |
5729 | } | |
5730 | ||
5731 | if (gfc_match_eos () != MATCH_YES) | |
5732 | { | |
5733 | /* Only makes sense if we have a where-construct-name. */ | |
5734 | if (!gfc_current_block ()) | |
5735 | { | |
5736 | m = MATCH_ERROR; | |
5737 | goto cleanup; | |
5738 | } | |
5739 | /* Better be a name at this point. */ | |
5740 | m = gfc_match_name (name); | |
5741 | if (m == MATCH_NO) | |
5742 | goto syntax; | |
5743 | if (m == MATCH_ERROR) | |
5744 | goto cleanup; | |
5745 | ||
5746 | if (gfc_match_eos () != MATCH_YES) | |
5747 | goto syntax; | |
5748 | ||
5749 | if (strcmp (name, gfc_current_block ()->name) != 0) | |
5750 | { | |
5751 | gfc_error ("Label '%s' at %C doesn't match WHERE label '%s'", | |
5752 | name, gfc_current_block ()->name); | |
5753 | goto cleanup; | |
5754 | } | |
5755 | } | |
5756 | ||
5757 | new_st.op = EXEC_WHERE; | |
5758 | new_st.expr1 = expr; | |
6de9cd9a DN |
5759 | return MATCH_YES; |
5760 | ||
5761 | syntax: | |
8c6a85e3 | 5762 | gfc_syntax_error (ST_ELSEWHERE); |
6de9cd9a DN |
5763 | |
5764 | cleanup: | |
8c6a85e3 TB |
5765 | gfc_free_expr (expr); |
5766 | return MATCH_ERROR; | |
6de9cd9a | 5767 | } |