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Commit | Line | Data |
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6de9cd9a | 1 | /* Primary expression subroutines |
b7e75771 | 2 | Copyright (C) 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
5056a350 | 3 | Free Software Foundation, Inc. |
6de9cd9a DN |
4 | Contributed by Andy Vaught |
5 | ||
d1d61a00 | 6 | This file is part of GCC. |
6de9cd9a | 7 | |
d1d61a00 TS |
8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
d234d788 | 10 | Software Foundation; either version 3, or (at your option) any later |
d1d61a00 | 11 | version. |
6de9cd9a | 12 | |
d1d61a00 TS |
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
6de9cd9a DN |
17 | |
18 | You should have received a copy of the GNU General Public License | |
d234d788 NC |
19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a | 21 | |
6de9cd9a DN |
22 | #include "config.h" |
23 | #include "system.h" | |
24 | #include "flags.h" | |
6de9cd9a DN |
25 | #include "gfortran.h" |
26 | #include "arith.h" | |
27 | #include "match.h" | |
28 | #include "parse.h" | |
8fc541d3 | 29 | #include "toplev.h" |
b7e75771 | 30 | #include "constructor.h" |
6de9cd9a DN |
31 | |
32 | /* Matches a kind-parameter expression, which is either a named | |
33 | symbolic constant or a nonnegative integer constant. If | |
34 | successful, sets the kind value to the correct integer. */ | |
35 | ||
36 | static match | |
37 | match_kind_param (int *kind) | |
38 | { | |
39 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
40 | gfc_symbol *sym; | |
41 | const char *p; | |
42 | match m; | |
43 | ||
5cf54585 | 44 | m = gfc_match_small_literal_int (kind, NULL); |
6de9cd9a DN |
45 | if (m != MATCH_NO) |
46 | return m; | |
47 | ||
48 | m = gfc_match_name (name); | |
49 | if (m != MATCH_YES) | |
50 | return m; | |
51 | ||
52 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
53 | return MATCH_ERROR; | |
54 | ||
55 | if (sym == NULL) | |
56 | return MATCH_NO; | |
57 | ||
58 | if (sym->attr.flavor != FL_PARAMETER) | |
59 | return MATCH_NO; | |
60 | ||
1d8e1d5d PT |
61 | if (sym->value == NULL) |
62 | return MATCH_NO; | |
63 | ||
6de9cd9a DN |
64 | p = gfc_extract_int (sym->value, kind); |
65 | if (p != NULL) | |
66 | return MATCH_NO; | |
67 | ||
a39fafac FXC |
68 | gfc_set_sym_referenced (sym); |
69 | ||
6de9cd9a DN |
70 | if (*kind < 0) |
71 | return MATCH_NO; | |
72 | ||
73 | return MATCH_YES; | |
74 | } | |
75 | ||
76 | ||
77 | /* Get a trailing kind-specification for non-character variables. | |
78 | Returns: | |
79 | the integer kind value or: | |
80 | -1 if an error was generated | |
81 | -2 if no kind was found */ | |
82 | ||
83 | static int | |
84 | get_kind (void) | |
85 | { | |
86 | int kind; | |
87 | match m; | |
88 | ||
89 | if (gfc_match_char ('_') != MATCH_YES) | |
90 | return -2; | |
91 | ||
92 | m = match_kind_param (&kind); | |
93 | if (m == MATCH_NO) | |
94 | gfc_error ("Missing kind-parameter at %C"); | |
95 | ||
96 | return (m == MATCH_YES) ? kind : -1; | |
97 | } | |
98 | ||
99 | ||
100 | /* Given a character and a radix, see if the character is a valid | |
101 | digit in that radix. */ | |
102 | ||
8fc541d3 FXC |
103 | int |
104 | gfc_check_digit (char c, int radix) | |
6de9cd9a DN |
105 | { |
106 | int r; | |
107 | ||
108 | switch (radix) | |
109 | { | |
110 | case 2: | |
111 | r = ('0' <= c && c <= '1'); | |
112 | break; | |
113 | ||
114 | case 8: | |
115 | r = ('0' <= c && c <= '7'); | |
116 | break; | |
117 | ||
118 | case 10: | |
119 | r = ('0' <= c && c <= '9'); | |
120 | break; | |
121 | ||
122 | case 16: | |
da8309c6 | 123 | r = ISXDIGIT (c); |
6de9cd9a DN |
124 | break; |
125 | ||
126 | default: | |
8fc541d3 | 127 | gfc_internal_error ("gfc_check_digit(): bad radix"); |
6de9cd9a DN |
128 | } |
129 | ||
130 | return r; | |
131 | } | |
132 | ||
133 | ||
134 | /* Match the digit string part of an integer if signflag is not set, | |
135 | the signed digit string part if signflag is set. If the buffer | |
136 | is NULL, we just count characters for the resolution pass. Returns | |
137 | the number of characters matched, -1 for no match. */ | |
138 | ||
139 | static int | |
140 | match_digits (int signflag, int radix, char *buffer) | |
141 | { | |
142 | locus old_loc; | |
8fc541d3 FXC |
143 | int length; |
144 | char c; | |
6de9cd9a DN |
145 | |
146 | length = 0; | |
8fc541d3 | 147 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
148 | |
149 | if (signflag && (c == '+' || c == '-')) | |
150 | { | |
151 | if (buffer != NULL) | |
152 | *buffer++ = c; | |
69029c61 | 153 | gfc_gobble_whitespace (); |
8fc541d3 | 154 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
155 | length++; |
156 | } | |
157 | ||
8fc541d3 | 158 | if (!gfc_check_digit (c, radix)) |
6de9cd9a DN |
159 | return -1; |
160 | ||
161 | length++; | |
162 | if (buffer != NULL) | |
163 | *buffer++ = c; | |
164 | ||
165 | for (;;) | |
166 | { | |
63645982 | 167 | old_loc = gfc_current_locus; |
8fc541d3 | 168 | c = gfc_next_ascii_char (); |
6de9cd9a | 169 | |
8fc541d3 | 170 | if (!gfc_check_digit (c, radix)) |
6de9cd9a DN |
171 | break; |
172 | ||
173 | if (buffer != NULL) | |
174 | *buffer++ = c; | |
175 | length++; | |
176 | } | |
177 | ||
63645982 | 178 | gfc_current_locus = old_loc; |
6de9cd9a DN |
179 | |
180 | return length; | |
181 | } | |
182 | ||
183 | ||
184 | /* Match an integer (digit string and optional kind). | |
185 | A sign will be accepted if signflag is set. */ | |
186 | ||
187 | static match | |
edf1eac2 | 188 | match_integer_constant (gfc_expr **result, int signflag) |
6de9cd9a DN |
189 | { |
190 | int length, kind; | |
191 | locus old_loc; | |
192 | char *buffer; | |
193 | gfc_expr *e; | |
194 | ||
63645982 | 195 | old_loc = gfc_current_locus; |
6de9cd9a DN |
196 | gfc_gobble_whitespace (); |
197 | ||
198 | length = match_digits (signflag, 10, NULL); | |
63645982 | 199 | gfc_current_locus = old_loc; |
6de9cd9a DN |
200 | if (length == -1) |
201 | return MATCH_NO; | |
202 | ||
ece3f663 | 203 | buffer = (char *) alloca (length + 1); |
6de9cd9a DN |
204 | memset (buffer, '\0', length + 1); |
205 | ||
206 | gfc_gobble_whitespace (); | |
207 | ||
208 | match_digits (signflag, 10, buffer); | |
209 | ||
210 | kind = get_kind (); | |
211 | if (kind == -2) | |
9d64df18 | 212 | kind = gfc_default_integer_kind; |
6de9cd9a DN |
213 | if (kind == -1) |
214 | return MATCH_ERROR; | |
215 | ||
e7a2d5fb | 216 | if (gfc_validate_kind (BT_INTEGER, kind, true) < 0) |
6de9cd9a DN |
217 | { |
218 | gfc_error ("Integer kind %d at %C not available", kind); | |
219 | return MATCH_ERROR; | |
220 | } | |
221 | ||
63645982 | 222 | e = gfc_convert_integer (buffer, kind, 10, &gfc_current_locus); |
6de9cd9a DN |
223 | |
224 | if (gfc_range_check (e) != ARITH_OK) | |
225 | { | |
b2458f91 TB |
226 | gfc_error ("Integer too big for its kind at %C. This check can be " |
227 | "disabled with the option -fno-range-check"); | |
6de9cd9a DN |
228 | |
229 | gfc_free_expr (e); | |
230 | return MATCH_ERROR; | |
231 | } | |
232 | ||
233 | *result = e; | |
234 | return MATCH_YES; | |
235 | } | |
236 | ||
237 | ||
d3642f89 FW |
238 | /* Match a Hollerith constant. */ |
239 | ||
240 | static match | |
edf1eac2 | 241 | match_hollerith_constant (gfc_expr **result) |
d3642f89 FW |
242 | { |
243 | locus old_loc; | |
edf1eac2 SK |
244 | gfc_expr *e = NULL; |
245 | const char *msg; | |
24bce1fd SB |
246 | int num; |
247 | int i; | |
d3642f89 FW |
248 | |
249 | old_loc = gfc_current_locus; | |
250 | gfc_gobble_whitespace (); | |
251 | ||
252 | if (match_integer_constant (&e, 0) == MATCH_YES | |
edf1eac2 | 253 | && gfc_match_char ('h') == MATCH_YES) |
d3642f89 | 254 | { |
edf1eac2 SK |
255 | if (gfc_notify_std (GFC_STD_LEGACY, "Extension: Hollerith constant " |
256 | "at %C") == FAILURE) | |
d3642f89 FW |
257 | goto cleanup; |
258 | ||
259 | msg = gfc_extract_int (e, &num); | |
260 | if (msg != NULL) | |
261 | { | |
262 | gfc_error (msg); | |
263 | goto cleanup; | |
264 | } | |
265 | if (num == 0) | |
266 | { | |
edf1eac2 SK |
267 | gfc_error ("Invalid Hollerith constant: %L must contain at least " |
268 | "one character", &old_loc); | |
d3642f89 FW |
269 | goto cleanup; |
270 | } | |
271 | if (e->ts.kind != gfc_default_integer_kind) | |
272 | { | |
eb6d74fa | 273 | gfc_error ("Invalid Hollerith constant: Integer kind at %L " |
edf1eac2 | 274 | "should be default", &old_loc); |
d3642f89 FW |
275 | goto cleanup; |
276 | } | |
277 | else | |
278 | { | |
d3642f89 | 279 | gfc_free_expr (e); |
b7e75771 JD |
280 | e = gfc_get_constant_expr (BT_HOLLERITH, gfc_default_character_kind, |
281 | &gfc_current_locus); | |
20585ad6 | 282 | |
ece3f663 | 283 | e->representation.string = XCNEWVEC (char, num + 1); |
8fc541d3 | 284 | |
20585ad6 | 285 | for (i = 0; i < num; i++) |
00660189 FXC |
286 | { |
287 | gfc_char_t c = gfc_next_char_literal (1); | |
288 | if (! gfc_wide_fits_in_byte (c)) | |
289 | { | |
290 | gfc_error ("Invalid Hollerith constant at %L contains a " | |
291 | "wide character", &old_loc); | |
292 | goto cleanup; | |
293 | } | |
294 | ||
295 | e->representation.string[i] = (unsigned char) c; | |
296 | } | |
8fc541d3 | 297 | |
20585ad6 BM |
298 | e->representation.string[num] = '\0'; |
299 | e->representation.length = num; | |
300 | ||
d3642f89 FW |
301 | *result = e; |
302 | return MATCH_YES; | |
303 | } | |
304 | } | |
305 | ||
306 | gfc_free_expr (e); | |
307 | gfc_current_locus = old_loc; | |
308 | return MATCH_NO; | |
309 | ||
310 | cleanup: | |
311 | gfc_free_expr (e); | |
312 | return MATCH_ERROR; | |
313 | } | |
314 | ||
315 | ||
6de9cd9a | 316 | /* Match a binary, octal or hexadecimal constant that can be found in |
78019d16 SK |
317 | a DATA statement. The standard permits b'010...', o'73...', and |
318 | z'a1...' where b, o, and z can be capital letters. This function | |
319 | also accepts postfixed forms of the constants: '01...'b, '73...'o, | |
320 | and 'a1...'z. An additional extension is the use of x for z. */ | |
6de9cd9a DN |
321 | |
322 | static match | |
edf1eac2 | 323 | match_boz_constant (gfc_expr **result) |
6de9cd9a | 324 | { |
8fc541d3 | 325 | int radix, length, x_hex, kind; |
78019d16 | 326 | locus old_loc, start_loc; |
8fc541d3 | 327 | char *buffer, post, delim; |
6de9cd9a | 328 | gfc_expr *e; |
6de9cd9a | 329 | |
78019d16 | 330 | start_loc = old_loc = gfc_current_locus; |
6de9cd9a DN |
331 | gfc_gobble_whitespace (); |
332 | ||
88199e7c | 333 | x_hex = 0; |
8fc541d3 | 334 | switch (post = gfc_next_ascii_char ()) |
6de9cd9a DN |
335 | { |
336 | case 'b': | |
337 | radix = 2; | |
78019d16 | 338 | post = 0; |
6de9cd9a DN |
339 | break; |
340 | case 'o': | |
341 | radix = 8; | |
78019d16 | 342 | post = 0; |
6de9cd9a DN |
343 | break; |
344 | case 'x': | |
88199e7c | 345 | x_hex = 1; |
6de9cd9a DN |
346 | /* Fall through. */ |
347 | case 'z': | |
348 | radix = 16; | |
78019d16 SK |
349 | post = 0; |
350 | break; | |
351 | case '\'': | |
352 | /* Fall through. */ | |
353 | case '\"': | |
354 | delim = post; | |
355 | post = 1; | |
356 | radix = 16; /* Set to accept any valid digit string. */ | |
6de9cd9a DN |
357 | break; |
358 | default: | |
359 | goto backup; | |
360 | } | |
361 | ||
362 | /* No whitespace allowed here. */ | |
363 | ||
78019d16 | 364 | if (post == 0) |
8fc541d3 | 365 | delim = gfc_next_ascii_char (); |
78019d16 | 366 | |
6de9cd9a DN |
367 | if (delim != '\'' && delim != '\"') |
368 | goto backup; | |
369 | ||
00a4618b | 370 | if (x_hex |
5d874166 | 371 | && (gfc_notify_std (GFC_STD_GNU, "Extension: Hexadecimal " |
0bf0efd5 | 372 | "constant at %C uses non-standard syntax") |
5d874166 TS |
373 | == FAILURE)) |
374 | return MATCH_ERROR; | |
375 | ||
63645982 | 376 | old_loc = gfc_current_locus; |
6de9cd9a DN |
377 | |
378 | length = match_digits (0, radix, NULL); | |
379 | if (length == -1) | |
380 | { | |
78019d16 | 381 | gfc_error ("Empty set of digits in BOZ constant at %C"); |
6de9cd9a DN |
382 | return MATCH_ERROR; |
383 | } | |
384 | ||
8fc541d3 | 385 | if (gfc_next_ascii_char () != delim) |
6de9cd9a | 386 | { |
78019d16 SK |
387 | gfc_error ("Illegal character in BOZ constant at %C"); |
388 | return MATCH_ERROR; | |
389 | } | |
390 | ||
391 | if (post == 1) | |
392 | { | |
8fc541d3 | 393 | switch (gfc_next_ascii_char ()) |
78019d16 SK |
394 | { |
395 | case 'b': | |
396 | radix = 2; | |
21dac32c | 397 | break; |
78019d16 SK |
398 | case 'o': |
399 | radix = 8; | |
21dac32c | 400 | break; |
78019d16 SK |
401 | case 'x': |
402 | /* Fall through. */ | |
403 | case 'z': | |
404 | radix = 16; | |
21dac32c | 405 | break; |
31043f6c | 406 | default: |
78019d16 | 407 | goto backup; |
31043f6c | 408 | } |
0bf0efd5 TB |
409 | |
410 | if (gfc_notify_std (GFC_STD_GNU, "Extension: BOZ constant " | |
411 | "at %C uses non-standard postfix syntax") | |
412 | == FAILURE) | |
413 | return MATCH_ERROR; | |
6de9cd9a DN |
414 | } |
415 | ||
63645982 | 416 | gfc_current_locus = old_loc; |
6de9cd9a | 417 | |
ece3f663 | 418 | buffer = (char *) alloca (length + 1); |
6de9cd9a DN |
419 | memset (buffer, '\0', length + 1); |
420 | ||
421 | match_digits (0, radix, buffer); | |
8fc541d3 | 422 | gfc_next_ascii_char (); /* Eat delimiter. */ |
78019d16 | 423 | if (post == 1) |
8fc541d3 | 424 | gfc_next_ascii_char (); /* Eat postfixed b, o, z, or x. */ |
6de9cd9a | 425 | |
f4e7375a SK |
426 | /* In section 5.2.5 and following C567 in the Fortran 2003 standard, we find |
427 | "If a data-stmt-constant is a boz-literal-constant, the corresponding | |
428 | variable shall be of type integer. The boz-literal-constant is treated | |
429 | as if it were an int-literal-constant with a kind-param that specifies | |
430 | the representation method with the largest decimal exponent range | |
431 | supported by the processor." */ | |
432 | ||
433 | kind = gfc_max_integer_kind; | |
5d874166 | 434 | e = gfc_convert_integer (buffer, kind, radix, &gfc_current_locus); |
6de9cd9a | 435 | |
00a4618b TB |
436 | /* Mark as boz variable. */ |
437 | e->is_boz = 1; | |
438 | ||
6de9cd9a DN |
439 | if (gfc_range_check (e) != ARITH_OK) |
440 | { | |
5d874166 | 441 | gfc_error ("Integer too big for integer kind %i at %C", kind); |
88199e7c TS |
442 | gfc_free_expr (e); |
443 | return MATCH_ERROR; | |
444 | } | |
445 | ||
0bf0efd5 | 446 | if (!gfc_in_match_data () |
00a4618b | 447 | && (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BOZ used outside a DATA " |
0bf0efd5 TB |
448 | "statement at %C") |
449 | == FAILURE)) | |
450 | return MATCH_ERROR; | |
451 | ||
6de9cd9a DN |
452 | *result = e; |
453 | return MATCH_YES; | |
454 | ||
455 | backup: | |
78019d16 | 456 | gfc_current_locus = start_loc; |
6de9cd9a DN |
457 | return MATCH_NO; |
458 | } | |
459 | ||
460 | ||
69029c61 | 461 | /* Match a real constant of some sort. Allow a signed constant if signflag |
00a4618b | 462 | is nonzero. */ |
6de9cd9a DN |
463 | |
464 | static match | |
edf1eac2 | 465 | match_real_constant (gfc_expr **result, int signflag) |
6de9cd9a | 466 | { |
8fc541d3 | 467 | int kind, count, seen_dp, seen_digits; |
6de9cd9a | 468 | locus old_loc, temp_loc; |
8fc541d3 | 469 | char *p, *buffer, c, exp_char; |
6de9cd9a | 470 | gfc_expr *e; |
69029c61 | 471 | bool negate; |
6de9cd9a | 472 | |
63645982 | 473 | old_loc = gfc_current_locus; |
6de9cd9a DN |
474 | gfc_gobble_whitespace (); |
475 | ||
476 | e = NULL; | |
477 | ||
478 | count = 0; | |
479 | seen_dp = 0; | |
480 | seen_digits = 0; | |
481 | exp_char = ' '; | |
69029c61 | 482 | negate = FALSE; |
6de9cd9a | 483 | |
8fc541d3 | 484 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
485 | if (signflag && (c == '+' || c == '-')) |
486 | { | |
69029c61 PB |
487 | if (c == '-') |
488 | negate = TRUE; | |
489 | ||
490 | gfc_gobble_whitespace (); | |
8fc541d3 | 491 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
492 | } |
493 | ||
02712c16 | 494 | /* Scan significand. */ |
8fc541d3 | 495 | for (;; c = gfc_next_ascii_char (), count++) |
6de9cd9a DN |
496 | { |
497 | if (c == '.') | |
498 | { | |
499 | if (seen_dp) | |
500 | goto done; | |
501 | ||
edf1eac2 SK |
502 | /* Check to see if "." goes with a following operator like |
503 | ".eq.". */ | |
63645982 | 504 | temp_loc = gfc_current_locus; |
8fc541d3 | 505 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
506 | |
507 | if (c == 'e' || c == 'd' || c == 'q') | |
508 | { | |
8fc541d3 | 509 | c = gfc_next_ascii_char (); |
6de9cd9a | 510 | if (c == '.') |
f7b529fa | 511 | goto done; /* Operator named .e. or .d. */ |
6de9cd9a DN |
512 | } |
513 | ||
514 | if (ISALPHA (c)) | |
515 | goto done; /* Distinguish 1.e9 from 1.eq.2 */ | |
516 | ||
63645982 | 517 | gfc_current_locus = temp_loc; |
6de9cd9a DN |
518 | seen_dp = 1; |
519 | continue; | |
520 | } | |
521 | ||
522 | if (ISDIGIT (c)) | |
523 | { | |
524 | seen_digits = 1; | |
525 | continue; | |
526 | } | |
527 | ||
528 | break; | |
529 | } | |
530 | ||
edf1eac2 | 531 | if (!seen_digits || (c != 'e' && c != 'd' && c != 'q')) |
6de9cd9a DN |
532 | goto done; |
533 | exp_char = c; | |
534 | ||
535 | /* Scan exponent. */ | |
8fc541d3 | 536 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
537 | count++; |
538 | ||
539 | if (c == '+' || c == '-') | |
540 | { /* optional sign */ | |
8fc541d3 | 541 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
542 | count++; |
543 | } | |
544 | ||
545 | if (!ISDIGIT (c)) | |
546 | { | |
6de9cd9a DN |
547 | gfc_error ("Missing exponent in real number at %C"); |
548 | return MATCH_ERROR; | |
549 | } | |
550 | ||
551 | while (ISDIGIT (c)) | |
552 | { | |
8fc541d3 | 553 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
554 | count++; |
555 | } | |
556 | ||
557 | done: | |
69029c61 | 558 | /* Check that we have a numeric constant. */ |
6de9cd9a DN |
559 | if (!seen_digits || (!seen_dp && exp_char == ' ')) |
560 | { | |
63645982 | 561 | gfc_current_locus = old_loc; |
6de9cd9a DN |
562 | return MATCH_NO; |
563 | } | |
564 | ||
565 | /* Convert the number. */ | |
63645982 | 566 | gfc_current_locus = old_loc; |
6de9cd9a DN |
567 | gfc_gobble_whitespace (); |
568 | ||
ece3f663 | 569 | buffer = (char *) alloca (count + 1); |
6de9cd9a DN |
570 | memset (buffer, '\0', count + 1); |
571 | ||
6de9cd9a | 572 | p = buffer; |
8fc541d3 | 573 | c = gfc_next_ascii_char (); |
69029c61 | 574 | if (c == '+' || c == '-') |
6de9cd9a | 575 | { |
69029c61 | 576 | gfc_gobble_whitespace (); |
8fc541d3 | 577 | c = gfc_next_ascii_char (); |
69029c61 PB |
578 | } |
579 | ||
580 | /* Hack for mpfr_set_str(). */ | |
581 | for (;;) | |
582 | { | |
583 | if (c == 'd' || c == 'q') | |
6de9cd9a | 584 | *p = 'e'; |
69029c61 PB |
585 | else |
586 | *p = c; | |
6de9cd9a | 587 | p++; |
69029c61 PB |
588 | if (--count == 0) |
589 | break; | |
590 | ||
8fc541d3 | 591 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
592 | } |
593 | ||
594 | kind = get_kind (); | |
595 | if (kind == -1) | |
596 | goto cleanup; | |
597 | ||
598 | switch (exp_char) | |
599 | { | |
600 | case 'd': | |
601 | if (kind != -2) | |
602 | { | |
edf1eac2 SK |
603 | gfc_error ("Real number at %C has a 'd' exponent and an explicit " |
604 | "kind"); | |
6de9cd9a DN |
605 | goto cleanup; |
606 | } | |
9d64df18 | 607 | kind = gfc_default_double_kind; |
6de9cd9a DN |
608 | break; |
609 | ||
6de9cd9a DN |
610 | default: |
611 | if (kind == -2) | |
9d64df18 | 612 | kind = gfc_default_real_kind; |
6de9cd9a | 613 | |
e7a2d5fb | 614 | if (gfc_validate_kind (BT_REAL, kind, true) < 0) |
6de9cd9a DN |
615 | { |
616 | gfc_error ("Invalid real kind %d at %C", kind); | |
617 | goto cleanup; | |
618 | } | |
619 | } | |
620 | ||
63645982 | 621 | e = gfc_convert_real (buffer, kind, &gfc_current_locus); |
69029c61 PB |
622 | if (negate) |
623 | mpfr_neg (e->value.real, e->value.real, GFC_RND_MODE); | |
6de9cd9a DN |
624 | |
625 | switch (gfc_range_check (e)) | |
626 | { | |
627 | case ARITH_OK: | |
628 | break; | |
629 | case ARITH_OVERFLOW: | |
630 | gfc_error ("Real constant overflows its kind at %C"); | |
631 | goto cleanup; | |
632 | ||
633 | case ARITH_UNDERFLOW: | |
2d8b59df | 634 | if (gfc_option.warn_underflow) |
edf1eac2 | 635 | gfc_warning ("Real constant underflows its kind at %C"); |
f8e566e5 | 636 | mpfr_set_ui (e->value.real, 0, GFC_RND_MODE); |
2d8b59df | 637 | break; |
6de9cd9a DN |
638 | |
639 | default: | |
640 | gfc_internal_error ("gfc_range_check() returned bad value"); | |
641 | } | |
642 | ||
643 | *result = e; | |
644 | return MATCH_YES; | |
645 | ||
646 | cleanup: | |
647 | gfc_free_expr (e); | |
648 | return MATCH_ERROR; | |
649 | } | |
650 | ||
651 | ||
652 | /* Match a substring reference. */ | |
653 | ||
654 | static match | |
edf1eac2 | 655 | match_substring (gfc_charlen *cl, int init, gfc_ref **result) |
6de9cd9a DN |
656 | { |
657 | gfc_expr *start, *end; | |
658 | locus old_loc; | |
659 | gfc_ref *ref; | |
660 | match m; | |
661 | ||
662 | start = NULL; | |
663 | end = NULL; | |
664 | ||
63645982 | 665 | old_loc = gfc_current_locus; |
6de9cd9a DN |
666 | |
667 | m = gfc_match_char ('('); | |
668 | if (m != MATCH_YES) | |
669 | return MATCH_NO; | |
670 | ||
671 | if (gfc_match_char (':') != MATCH_YES) | |
672 | { | |
673 | if (init) | |
674 | m = gfc_match_init_expr (&start); | |
675 | else | |
676 | m = gfc_match_expr (&start); | |
677 | ||
678 | if (m != MATCH_YES) | |
679 | { | |
680 | m = MATCH_NO; | |
681 | goto cleanup; | |
682 | } | |
683 | ||
684 | m = gfc_match_char (':'); | |
685 | if (m != MATCH_YES) | |
686 | goto cleanup; | |
687 | } | |
688 | ||
689 | if (gfc_match_char (')') != MATCH_YES) | |
690 | { | |
691 | if (init) | |
692 | m = gfc_match_init_expr (&end); | |
693 | else | |
694 | m = gfc_match_expr (&end); | |
695 | ||
696 | if (m == MATCH_NO) | |
697 | goto syntax; | |
698 | if (m == MATCH_ERROR) | |
699 | goto cleanup; | |
700 | ||
701 | m = gfc_match_char (')'); | |
702 | if (m == MATCH_NO) | |
703 | goto syntax; | |
704 | } | |
705 | ||
706 | /* Optimize away the (:) reference. */ | |
707 | if (start == NULL && end == NULL) | |
708 | ref = NULL; | |
709 | else | |
710 | { | |
711 | ref = gfc_get_ref (); | |
712 | ||
713 | ref->type = REF_SUBSTRING; | |
714 | if (start == NULL) | |
b7e75771 | 715 | start = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1); |
6de9cd9a DN |
716 | ref->u.ss.start = start; |
717 | if (end == NULL && cl) | |
718 | end = gfc_copy_expr (cl->length); | |
719 | ref->u.ss.end = end; | |
720 | ref->u.ss.length = cl; | |
721 | } | |
722 | ||
723 | *result = ref; | |
724 | return MATCH_YES; | |
725 | ||
726 | syntax: | |
727 | gfc_error ("Syntax error in SUBSTRING specification at %C"); | |
728 | m = MATCH_ERROR; | |
729 | ||
730 | cleanup: | |
731 | gfc_free_expr (start); | |
732 | gfc_free_expr (end); | |
733 | ||
63645982 | 734 | gfc_current_locus = old_loc; |
6de9cd9a DN |
735 | return m; |
736 | } | |
737 | ||
738 | ||
739 | /* Reads the next character of a string constant, taking care to | |
740 | return doubled delimiters on the input as a single instance of | |
741 | the delimiter. | |
742 | ||
8fc541d3 | 743 | Special return values for "ret" argument are: |
6de9cd9a DN |
744 | -1 End of the string, as determined by the delimiter |
745 | -2 Unterminated string detected | |
746 | ||
747 | Backslash codes are also expanded at this time. */ | |
748 | ||
8fc541d3 FXC |
749 | static gfc_char_t |
750 | next_string_char (gfc_char_t delimiter, int *ret) | |
6de9cd9a DN |
751 | { |
752 | locus old_locus; | |
8fc541d3 | 753 | gfc_char_t c; |
6de9cd9a DN |
754 | |
755 | c = gfc_next_char_literal (1); | |
8fc541d3 | 756 | *ret = 0; |
6de9cd9a DN |
757 | |
758 | if (c == '\n') | |
8fc541d3 FXC |
759 | { |
760 | *ret = -2; | |
761 | return 0; | |
762 | } | |
6de9cd9a | 763 | |
131c66cd | 764 | if (gfc_option.flag_backslash && c == '\\') |
6de9cd9a | 765 | { |
63645982 | 766 | old_locus = gfc_current_locus; |
6de9cd9a | 767 | |
a88a266c SK |
768 | if (gfc_match_special_char (&c) == MATCH_NO) |
769 | gfc_current_locus = old_locus; | |
2e6a83a7 SK |
770 | |
771 | if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings) | |
772 | gfc_warning ("Extension: backslash character at %C"); | |
6de9cd9a DN |
773 | } |
774 | ||
775 | if (c != delimiter) | |
776 | return c; | |
777 | ||
63645982 | 778 | old_locus = gfc_current_locus; |
1355d8e7 | 779 | c = gfc_next_char_literal (0); |
6de9cd9a DN |
780 | |
781 | if (c == delimiter) | |
782 | return c; | |
63645982 | 783 | gfc_current_locus = old_locus; |
6de9cd9a | 784 | |
8fc541d3 FXC |
785 | *ret = -1; |
786 | return 0; | |
6de9cd9a DN |
787 | } |
788 | ||
789 | ||
790 | /* Special case of gfc_match_name() that matches a parameter kind name | |
791 | before a string constant. This takes case of the weird but legal | |
4f8ea09e | 792 | case of: |
6de9cd9a DN |
793 | |
794 | kind_____'string' | |
795 | ||
796 | where kind____ is a parameter. gfc_match_name() will happily slurp | |
797 | up all the underscores, which leads to problems. If we return | |
798 | MATCH_YES, the parse pointer points to the final underscore, which | |
799 | is not part of the name. We never return MATCH_ERROR-- errors in | |
800 | the name will be detected later. */ | |
801 | ||
802 | static match | |
803 | match_charkind_name (char *name) | |
804 | { | |
805 | locus old_loc; | |
806 | char c, peek; | |
807 | int len; | |
808 | ||
809 | gfc_gobble_whitespace (); | |
8fc541d3 | 810 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
811 | if (!ISALPHA (c)) |
812 | return MATCH_NO; | |
813 | ||
814 | *name++ = c; | |
815 | len = 1; | |
816 | ||
817 | for (;;) | |
818 | { | |
63645982 | 819 | old_loc = gfc_current_locus; |
8fc541d3 | 820 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
821 | |
822 | if (c == '_') | |
823 | { | |
8fc541d3 | 824 | peek = gfc_peek_ascii_char (); |
6de9cd9a DN |
825 | |
826 | if (peek == '\'' || peek == '\"') | |
827 | { | |
63645982 | 828 | gfc_current_locus = old_loc; |
6de9cd9a DN |
829 | *name = '\0'; |
830 | return MATCH_YES; | |
831 | } | |
832 | } | |
833 | ||
834 | if (!ISALNUM (c) | |
835 | && c != '_' | |
ffa61a5e | 836 | && (c != '$' || !gfc_option.flag_dollar_ok)) |
6de9cd9a DN |
837 | break; |
838 | ||
839 | *name++ = c; | |
840 | if (++len > GFC_MAX_SYMBOL_LEN) | |
841 | break; | |
842 | } | |
843 | ||
844 | return MATCH_NO; | |
845 | } | |
846 | ||
847 | ||
848 | /* See if the current input matches a character constant. Lots of | |
849 | contortions have to be done to match the kind parameter which comes | |
850 | before the actual string. The main consideration is that we don't | |
851 | want to error out too quickly. For example, we don't actually do | |
852 | any validation of the kinds until we have actually seen a legal | |
853 | delimiter. Using match_kind_param() generates errors too quickly. */ | |
854 | ||
855 | static match | |
edf1eac2 | 856 | match_string_constant (gfc_expr **result) |
6de9cd9a | 857 | { |
00660189 | 858 | char name[GFC_MAX_SYMBOL_LEN + 1], peek; |
8fc541d3 | 859 | int i, kind, length, warn_ampersand, ret; |
6de9cd9a DN |
860 | locus old_locus, start_locus; |
861 | gfc_symbol *sym; | |
862 | gfc_expr *e; | |
863 | const char *q; | |
864 | match m; | |
00660189 | 865 | gfc_char_t c, delimiter, *p; |
6de9cd9a | 866 | |
63645982 | 867 | old_locus = gfc_current_locus; |
6de9cd9a DN |
868 | |
869 | gfc_gobble_whitespace (); | |
870 | ||
63645982 | 871 | start_locus = gfc_current_locus; |
6de9cd9a DN |
872 | |
873 | c = gfc_next_char (); | |
874 | if (c == '\'' || c == '"') | |
875 | { | |
9d64df18 | 876 | kind = gfc_default_character_kind; |
6de9cd9a DN |
877 | goto got_delim; |
878 | } | |
879 | ||
8fc541d3 | 880 | if (gfc_wide_is_digit (c)) |
6de9cd9a DN |
881 | { |
882 | kind = 0; | |
883 | ||
8fc541d3 | 884 | while (gfc_wide_is_digit (c)) |
6de9cd9a DN |
885 | { |
886 | kind = kind * 10 + c - '0'; | |
887 | if (kind > 9999999) | |
888 | goto no_match; | |
889 | c = gfc_next_char (); | |
890 | } | |
891 | ||
892 | } | |
893 | else | |
894 | { | |
63645982 | 895 | gfc_current_locus = old_locus; |
6de9cd9a DN |
896 | |
897 | m = match_charkind_name (name); | |
898 | if (m != MATCH_YES) | |
899 | goto no_match; | |
900 | ||
901 | if (gfc_find_symbol (name, NULL, 1, &sym) | |
902 | || sym == NULL | |
903 | || sym->attr.flavor != FL_PARAMETER) | |
904 | goto no_match; | |
905 | ||
906 | kind = -1; | |
907 | c = gfc_next_char (); | |
908 | } | |
909 | ||
910 | if (c == ' ') | |
911 | { | |
912 | gfc_gobble_whitespace (); | |
913 | c = gfc_next_char (); | |
914 | } | |
915 | ||
916 | if (c != '_') | |
917 | goto no_match; | |
918 | ||
919 | gfc_gobble_whitespace (); | |
63645982 | 920 | start_locus = gfc_current_locus; |
6de9cd9a DN |
921 | |
922 | c = gfc_next_char (); | |
923 | if (c != '\'' && c != '"') | |
924 | goto no_match; | |
925 | ||
926 | if (kind == -1) | |
927 | { | |
928 | q = gfc_extract_int (sym->value, &kind); | |
929 | if (q != NULL) | |
930 | { | |
931 | gfc_error (q); | |
932 | return MATCH_ERROR; | |
933 | } | |
a39fafac | 934 | gfc_set_sym_referenced (sym); |
6de9cd9a DN |
935 | } |
936 | ||
e7a2d5fb | 937 | if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
6de9cd9a DN |
938 | { |
939 | gfc_error ("Invalid kind %d for CHARACTER constant at %C", kind); | |
940 | return MATCH_ERROR; | |
941 | } | |
942 | ||
943 | got_delim: | |
944 | /* Scan the string into a block of memory by first figuring out how | |
945 | long it is, allocating the structure, then re-reading it. This | |
946 | isn't particularly efficient, but string constants aren't that | |
947 | common in most code. TODO: Use obstacks? */ | |
948 | ||
949 | delimiter = c; | |
950 | length = 0; | |
951 | ||
952 | for (;;) | |
953 | { | |
8fc541d3 FXC |
954 | c = next_string_char (delimiter, &ret); |
955 | if (ret == -1) | |
6de9cd9a | 956 | break; |
8fc541d3 | 957 | if (ret == -2) |
6de9cd9a | 958 | { |
63645982 | 959 | gfc_current_locus = start_locus; |
6de9cd9a DN |
960 | gfc_error ("Unterminated character constant beginning at %C"); |
961 | return MATCH_ERROR; | |
962 | } | |
963 | ||
964 | length++; | |
965 | } | |
966 | ||
78019d16 SK |
967 | /* Peek at the next character to see if it is a b, o, z, or x for the |
968 | postfixed BOZ literal constants. */ | |
8fc541d3 FXC |
969 | peek = gfc_peek_ascii_char (); |
970 | if (peek == 'b' || peek == 'o' || peek =='z' || peek == 'x') | |
78019d16 SK |
971 | goto no_match; |
972 | ||
b7e75771 | 973 | e = gfc_get_character_expr (kind, &start_locus, NULL, length); |
6de9cd9a | 974 | e->ref = NULL; |
a8b3b0b6 CR |
975 | e->ts.is_c_interop = 0; |
976 | e->ts.is_iso_c = 0; | |
6de9cd9a | 977 | |
63645982 | 978 | gfc_current_locus = start_locus; |
6de9cd9a DN |
979 | gfc_next_char (); /* Skip delimiter */ |
980 | ||
1355d8e7 TB |
981 | /* We disable the warning for the following loop as the warning has already |
982 | been printed in the loop above. */ | |
983 | warn_ampersand = gfc_option.warn_ampersand; | |
984 | gfc_option.warn_ampersand = 0; | |
985 | ||
b7e75771 | 986 | p = e->value.character.string; |
6de9cd9a | 987 | for (i = 0; i < length; i++) |
8fc541d3 FXC |
988 | { |
989 | c = next_string_char (delimiter, &ret); | |
990 | ||
d393bbd7 | 991 | if (!gfc_check_character_range (c, kind)) |
8fc541d3 | 992 | { |
d393bbd7 FXC |
993 | gfc_error ("Character '%s' in string at %C is not representable " |
994 | "in character kind %d", gfc_print_wide_char (c), kind); | |
8fc541d3 FXC |
995 | return MATCH_ERROR; |
996 | } | |
997 | ||
00660189 | 998 | *p++ = c; |
8fc541d3 | 999 | } |
6de9cd9a DN |
1000 | |
1001 | *p = '\0'; /* TODO: C-style string is for development/debug purposes. */ | |
1355d8e7 | 1002 | gfc_option.warn_ampersand = warn_ampersand; |
6de9cd9a | 1003 | |
8fc541d3 FXC |
1004 | next_string_char (delimiter, &ret); |
1005 | if (ret != -1) | |
6de9cd9a DN |
1006 | gfc_internal_error ("match_string_constant(): Delimiter not found"); |
1007 | ||
1008 | if (match_substring (NULL, 0, &e->ref) != MATCH_NO) | |
1009 | e->expr_type = EXPR_SUBSTRING; | |
1010 | ||
1011 | *result = e; | |
1012 | ||
1013 | return MATCH_YES; | |
1014 | ||
1015 | no_match: | |
63645982 | 1016 | gfc_current_locus = old_locus; |
6de9cd9a DN |
1017 | return MATCH_NO; |
1018 | } | |
1019 | ||
1020 | ||
500f8f7b RS |
1021 | /* Match a .true. or .false. Returns 1 if a .true. was found, |
1022 | 0 if a .false. was found, and -1 otherwise. */ | |
1023 | static int | |
1024 | match_logical_constant_string (void) | |
1025 | { | |
1026 | locus orig_loc = gfc_current_locus; | |
1027 | ||
1028 | gfc_gobble_whitespace (); | |
8fc541d3 | 1029 | if (gfc_next_ascii_char () == '.') |
500f8f7b | 1030 | { |
8fc541d3 | 1031 | char ch = gfc_next_ascii_char (); |
500f8f7b RS |
1032 | if (ch == 'f') |
1033 | { | |
8fc541d3 FXC |
1034 | if (gfc_next_ascii_char () == 'a' |
1035 | && gfc_next_ascii_char () == 'l' | |
1036 | && gfc_next_ascii_char () == 's' | |
1037 | && gfc_next_ascii_char () == 'e' | |
1038 | && gfc_next_ascii_char () == '.') | |
500f8f7b RS |
1039 | /* Matched ".false.". */ |
1040 | return 0; | |
1041 | } | |
1042 | else if (ch == 't') | |
1043 | { | |
8fc541d3 FXC |
1044 | if (gfc_next_ascii_char () == 'r' |
1045 | && gfc_next_ascii_char () == 'u' | |
1046 | && gfc_next_ascii_char () == 'e' | |
1047 | && gfc_next_ascii_char () == '.') | |
500f8f7b RS |
1048 | /* Matched ".true.". */ |
1049 | return 1; | |
1050 | } | |
1051 | } | |
1052 | gfc_current_locus = orig_loc; | |
1053 | return -1; | |
1054 | } | |
1055 | ||
6de9cd9a DN |
1056 | /* Match a .true. or .false. */ |
1057 | ||
1058 | static match | |
edf1eac2 | 1059 | match_logical_constant (gfc_expr **result) |
6de9cd9a | 1060 | { |
6de9cd9a DN |
1061 | gfc_expr *e; |
1062 | int i, kind; | |
1063 | ||
500f8f7b | 1064 | i = match_logical_constant_string (); |
6de9cd9a DN |
1065 | if (i == -1) |
1066 | return MATCH_NO; | |
1067 | ||
1068 | kind = get_kind (); | |
1069 | if (kind == -1) | |
1070 | return MATCH_ERROR; | |
1071 | if (kind == -2) | |
9d64df18 | 1072 | kind = gfc_default_logical_kind; |
6de9cd9a | 1073 | |
e7a2d5fb | 1074 | if (gfc_validate_kind (BT_LOGICAL, kind, true) < 0) |
eb62be44 SK |
1075 | { |
1076 | gfc_error ("Bad kind for logical constant at %C"); | |
1077 | return MATCH_ERROR; | |
1078 | } | |
6de9cd9a | 1079 | |
b7e75771 | 1080 | e = gfc_get_logical_expr (kind, &gfc_current_locus, i); |
a8b3b0b6 CR |
1081 | e->ts.is_c_interop = 0; |
1082 | e->ts.is_iso_c = 0; | |
6de9cd9a DN |
1083 | |
1084 | *result = e; | |
1085 | return MATCH_YES; | |
1086 | } | |
1087 | ||
1088 | ||
1089 | /* Match a real or imaginary part of a complex constant that is a | |
1090 | symbolic constant. */ | |
1091 | ||
1092 | static match | |
edf1eac2 | 1093 | match_sym_complex_part (gfc_expr **result) |
6de9cd9a DN |
1094 | { |
1095 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1096 | gfc_symbol *sym; | |
1097 | gfc_expr *e; | |
1098 | match m; | |
1099 | ||
1100 | m = gfc_match_name (name); | |
1101 | if (m != MATCH_YES) | |
1102 | return m; | |
1103 | ||
1104 | if (gfc_find_symbol (name, NULL, 1, &sym) || sym == NULL) | |
1105 | return MATCH_NO; | |
1106 | ||
1107 | if (sym->attr.flavor != FL_PARAMETER) | |
1108 | { | |
1109 | gfc_error ("Expected PARAMETER symbol in complex constant at %C"); | |
1110 | return MATCH_ERROR; | |
1111 | } | |
1112 | ||
1113 | if (!gfc_numeric_ts (&sym->value->ts)) | |
1114 | { | |
1115 | gfc_error ("Numeric PARAMETER required in complex constant at %C"); | |
1116 | return MATCH_ERROR; | |
1117 | } | |
1118 | ||
1119 | if (sym->value->rank != 0) | |
1120 | { | |
1121 | gfc_error ("Scalar PARAMETER required in complex constant at %C"); | |
1122 | return MATCH_ERROR; | |
1123 | } | |
1124 | ||
e227ac57 FXC |
1125 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PARAMETER symbol in " |
1126 | "complex constant at %C") == FAILURE) | |
1127 | return MATCH_ERROR; | |
1128 | ||
6de9cd9a DN |
1129 | switch (sym->value->ts.type) |
1130 | { | |
1131 | case BT_REAL: | |
1132 | e = gfc_copy_expr (sym->value); | |
1133 | break; | |
1134 | ||
1135 | case BT_COMPLEX: | |
1136 | e = gfc_complex2real (sym->value, sym->value->ts.kind); | |
1137 | if (e == NULL) | |
1138 | goto error; | |
1139 | break; | |
1140 | ||
1141 | case BT_INTEGER: | |
9d64df18 | 1142 | e = gfc_int2real (sym->value, gfc_default_real_kind); |
6de9cd9a DN |
1143 | if (e == NULL) |
1144 | goto error; | |
1145 | break; | |
1146 | ||
1147 | default: | |
1148 | gfc_internal_error ("gfc_match_sym_complex_part(): Bad type"); | |
1149 | } | |
1150 | ||
edf1eac2 | 1151 | *result = e; /* e is a scalar, real, constant expression. */ |
6de9cd9a DN |
1152 | return MATCH_YES; |
1153 | ||
1154 | error: | |
1155 | gfc_error ("Error converting PARAMETER constant in complex constant at %C"); | |
1156 | return MATCH_ERROR; | |
1157 | } | |
1158 | ||
1159 | ||
6de9cd9a DN |
1160 | /* Match a real or imaginary part of a complex number. */ |
1161 | ||
1162 | static match | |
edf1eac2 | 1163 | match_complex_part (gfc_expr **result) |
6de9cd9a DN |
1164 | { |
1165 | match m; | |
1166 | ||
1167 | m = match_sym_complex_part (result); | |
1168 | if (m != MATCH_NO) | |
1169 | return m; | |
1170 | ||
69029c61 PB |
1171 | m = match_real_constant (result, 1); |
1172 | if (m != MATCH_NO) | |
1173 | return m; | |
1174 | ||
1175 | return match_integer_constant (result, 1); | |
6de9cd9a DN |
1176 | } |
1177 | ||
1178 | ||
1179 | /* Try to match a complex constant. */ | |
1180 | ||
1181 | static match | |
edf1eac2 | 1182 | match_complex_constant (gfc_expr **result) |
6de9cd9a DN |
1183 | { |
1184 | gfc_expr *e, *real, *imag; | |
1185 | gfc_error_buf old_error; | |
1186 | gfc_typespec target; | |
1187 | locus old_loc; | |
1188 | int kind; | |
1189 | match m; | |
1190 | ||
63645982 | 1191 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1192 | real = imag = e = NULL; |
1193 | ||
1194 | m = gfc_match_char ('('); | |
1195 | if (m != MATCH_YES) | |
1196 | return m; | |
1197 | ||
1198 | gfc_push_error (&old_error); | |
1199 | ||
1200 | m = match_complex_part (&real); | |
1201 | if (m == MATCH_NO) | |
d71b89ca JJ |
1202 | { |
1203 | gfc_free_error (&old_error); | |
1204 | goto cleanup; | |
1205 | } | |
6de9cd9a DN |
1206 | |
1207 | if (gfc_match_char (',') == MATCH_NO) | |
1208 | { | |
1209 | gfc_pop_error (&old_error); | |
1210 | m = MATCH_NO; | |
1211 | goto cleanup; | |
1212 | } | |
1213 | ||
1214 | /* If m is error, then something was wrong with the real part and we | |
1215 | assume we have a complex constant because we've seen the ','. An | |
1216 | ambiguous case here is the start of an iterator list of some | |
1217 | sort. These sort of lists are matched prior to coming here. */ | |
1218 | ||
1219 | if (m == MATCH_ERROR) | |
d71b89ca JJ |
1220 | { |
1221 | gfc_free_error (&old_error); | |
1222 | goto cleanup; | |
1223 | } | |
6de9cd9a DN |
1224 | gfc_pop_error (&old_error); |
1225 | ||
1226 | m = match_complex_part (&imag); | |
1227 | if (m == MATCH_NO) | |
1228 | goto syntax; | |
1229 | if (m == MATCH_ERROR) | |
1230 | goto cleanup; | |
1231 | ||
1232 | m = gfc_match_char (')'); | |
1233 | if (m == MATCH_NO) | |
87ebdf2f SK |
1234 | { |
1235 | /* Give the matcher for implied do-loops a chance to run. This | |
1236 | yields a much saner error message for (/ (i, 4=i, 6) /). */ | |
8fc541d3 | 1237 | if (gfc_peek_ascii_char () == '=') |
87ebdf2f SK |
1238 | { |
1239 | m = MATCH_ERROR; | |
1240 | goto cleanup; | |
1241 | } | |
1242 | else | |
6de9cd9a | 1243 | goto syntax; |
87ebdf2f | 1244 | } |
6de9cd9a DN |
1245 | |
1246 | if (m == MATCH_ERROR) | |
1247 | goto cleanup; | |
1248 | ||
1249 | /* Decide on the kind of this complex number. */ | |
69029c61 PB |
1250 | if (real->ts.type == BT_REAL) |
1251 | { | |
1252 | if (imag->ts.type == BT_REAL) | |
1253 | kind = gfc_kind_max (real, imag); | |
1254 | else | |
1255 | kind = real->ts.kind; | |
1256 | } | |
1257 | else | |
1258 | { | |
1259 | if (imag->ts.type == BT_REAL) | |
1260 | kind = imag->ts.kind; | |
1261 | else | |
1262 | kind = gfc_default_real_kind; | |
1263 | } | |
6de9cd9a DN |
1264 | target.type = BT_REAL; |
1265 | target.kind = kind; | |
a8b3b0b6 CR |
1266 | target.is_c_interop = 0; |
1267 | target.is_iso_c = 0; | |
6de9cd9a | 1268 | |
69029c61 | 1269 | if (real->ts.type != BT_REAL || kind != real->ts.kind) |
6de9cd9a | 1270 | gfc_convert_type (real, &target, 2); |
69029c61 | 1271 | if (imag->ts.type != BT_REAL || kind != imag->ts.kind) |
6de9cd9a DN |
1272 | gfc_convert_type (imag, &target, 2); |
1273 | ||
1274 | e = gfc_convert_complex (real, imag, kind); | |
63645982 | 1275 | e->where = gfc_current_locus; |
6de9cd9a DN |
1276 | |
1277 | gfc_free_expr (real); | |
1278 | gfc_free_expr (imag); | |
1279 | ||
1280 | *result = e; | |
1281 | return MATCH_YES; | |
1282 | ||
1283 | syntax: | |
1284 | gfc_error ("Syntax error in COMPLEX constant at %C"); | |
1285 | m = MATCH_ERROR; | |
1286 | ||
1287 | cleanup: | |
1288 | gfc_free_expr (e); | |
1289 | gfc_free_expr (real); | |
1290 | gfc_free_expr (imag); | |
63645982 | 1291 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1292 | |
1293 | return m; | |
1294 | } | |
1295 | ||
1296 | ||
1297 | /* Match constants in any of several forms. Returns nonzero for a | |
1298 | match, zero for no match. */ | |
1299 | ||
1300 | match | |
edf1eac2 | 1301 | gfc_match_literal_constant (gfc_expr **result, int signflag) |
6de9cd9a DN |
1302 | { |
1303 | match m; | |
1304 | ||
1305 | m = match_complex_constant (result); | |
1306 | if (m != MATCH_NO) | |
1307 | return m; | |
1308 | ||
1309 | m = match_string_constant (result); | |
1310 | if (m != MATCH_NO) | |
1311 | return m; | |
1312 | ||
1313 | m = match_boz_constant (result); | |
1314 | if (m != MATCH_NO) | |
1315 | return m; | |
1316 | ||
1317 | m = match_real_constant (result, signflag); | |
1318 | if (m != MATCH_NO) | |
1319 | return m; | |
1320 | ||
d3642f89 FW |
1321 | m = match_hollerith_constant (result); |
1322 | if (m != MATCH_NO) | |
1323 | return m; | |
1324 | ||
6de9cd9a DN |
1325 | m = match_integer_constant (result, signflag); |
1326 | if (m != MATCH_NO) | |
1327 | return m; | |
1328 | ||
1329 | m = match_logical_constant (result); | |
1330 | if (m != MATCH_NO) | |
1331 | return m; | |
1332 | ||
1333 | return MATCH_NO; | |
1334 | } | |
1335 | ||
1336 | ||
2d71b918 JW |
1337 | /* This checks if a symbol is the return value of an encompassing function. |
1338 | Function nesting can be maximally two levels deep, but we may have | |
1339 | additional local namespaces like BLOCK etc. */ | |
1340 | ||
1341 | bool | |
1342 | gfc_is_function_return_value (gfc_symbol *sym, gfc_namespace *ns) | |
1343 | { | |
1344 | if (!sym->attr.function || (sym->result != sym)) | |
1345 | return false; | |
1346 | while (ns) | |
1347 | { | |
1348 | if (ns->proc_name == sym) | |
1349 | return true; | |
1350 | ns = ns->parent; | |
1351 | } | |
1352 | return false; | |
1353 | } | |
1354 | ||
1355 | ||
6de9cd9a DN |
1356 | /* Match a single actual argument value. An actual argument is |
1357 | usually an expression, but can also be a procedure name. If the | |
1358 | argument is a single name, it is not always possible to tell | |
1359 | whether the name is a dummy procedure or not. We treat these cases | |
1360 | by creating an argument that looks like a dummy procedure and | |
1361 | fixing things later during resolution. */ | |
1362 | ||
1363 | static match | |
edf1eac2 | 1364 | match_actual_arg (gfc_expr **result) |
6de9cd9a DN |
1365 | { |
1366 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1367 | gfc_symtree *symtree; | |
1368 | locus where, w; | |
1369 | gfc_expr *e; | |
8fc541d3 | 1370 | char c; |
6de9cd9a | 1371 | |
618f4f46 | 1372 | gfc_gobble_whitespace (); |
63645982 | 1373 | where = gfc_current_locus; |
6de9cd9a DN |
1374 | |
1375 | switch (gfc_match_name (name)) | |
1376 | { | |
1377 | case MATCH_ERROR: | |
1378 | return MATCH_ERROR; | |
1379 | ||
1380 | case MATCH_NO: | |
1381 | break; | |
1382 | ||
1383 | case MATCH_YES: | |
63645982 | 1384 | w = gfc_current_locus; |
6de9cd9a | 1385 | gfc_gobble_whitespace (); |
8fc541d3 | 1386 | c = gfc_next_ascii_char (); |
63645982 | 1387 | gfc_current_locus = w; |
6de9cd9a DN |
1388 | |
1389 | if (c != ',' && c != ')') | |
1390 | break; | |
1391 | ||
1392 | if (gfc_find_sym_tree (name, NULL, 1, &symtree)) | |
1393 | break; | |
1394 | /* Handle error elsewhere. */ | |
1395 | ||
1396 | /* Eliminate a couple of common cases where we know we don't | |
edf1eac2 | 1397 | have a function argument. */ |
6de9cd9a | 1398 | if (symtree == NULL) |
edf1eac2 | 1399 | { |
08a6b8e0 | 1400 | gfc_get_sym_tree (name, NULL, &symtree, false); |
edf1eac2 SK |
1401 | gfc_set_sym_referenced (symtree->n.sym); |
1402 | } | |
6de9cd9a DN |
1403 | else |
1404 | { | |
edf1eac2 | 1405 | gfc_symbol *sym; |
6de9cd9a | 1406 | |
edf1eac2 SK |
1407 | sym = symtree->n.sym; |
1408 | gfc_set_sym_referenced (sym); | |
6de9cd9a DN |
1409 | if (sym->attr.flavor != FL_PROCEDURE |
1410 | && sym->attr.flavor != FL_UNKNOWN) | |
1411 | break; | |
1412 | ||
6f9c9d6d TB |
1413 | if (sym->attr.in_common && !sym->attr.proc_pointer) |
1414 | { | |
1415 | gfc_add_flavor (&sym->attr, FL_VARIABLE, sym->name, | |
1416 | &sym->declared_at); | |
1417 | break; | |
1418 | } | |
1419 | ||
6de9cd9a DN |
1420 | /* If the symbol is a function with itself as the result and |
1421 | is being defined, then we have a variable. */ | |
7a4ef45b JJ |
1422 | if (sym->attr.function && sym->result == sym) |
1423 | { | |
2d71b918 | 1424 | if (gfc_is_function_return_value (sym, gfc_current_ns)) |
7a4ef45b JJ |
1425 | break; |
1426 | ||
1427 | if (sym->attr.entry | |
1428 | && (sym->ns == gfc_current_ns | |
1429 | || sym->ns == gfc_current_ns->parent)) | |
1430 | { | |
1431 | gfc_entry_list *el = NULL; | |
1432 | ||
1433 | for (el = sym->ns->entries; el; el = el->next) | |
1434 | if (sym == el->sym) | |
1435 | break; | |
1436 | ||
1437 | if (el) | |
1438 | break; | |
1439 | } | |
1440 | } | |
6de9cd9a DN |
1441 | } |
1442 | ||
1443 | e = gfc_get_expr (); /* Leave it unknown for now */ | |
1444 | e->symtree = symtree; | |
1445 | e->expr_type = EXPR_VARIABLE; | |
1446 | e->ts.type = BT_PROCEDURE; | |
1447 | e->where = where; | |
1448 | ||
1449 | *result = e; | |
1450 | return MATCH_YES; | |
1451 | } | |
1452 | ||
63645982 | 1453 | gfc_current_locus = where; |
6de9cd9a DN |
1454 | return gfc_match_expr (result); |
1455 | } | |
1456 | ||
1457 | ||
1458 | /* Match a keyword argument. */ | |
1459 | ||
1460 | static match | |
edf1eac2 | 1461 | match_keyword_arg (gfc_actual_arglist *actual, gfc_actual_arglist *base) |
6de9cd9a DN |
1462 | { |
1463 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1464 | gfc_actual_arglist *a; | |
1465 | locus name_locus; | |
1466 | match m; | |
1467 | ||
63645982 | 1468 | name_locus = gfc_current_locus; |
6de9cd9a DN |
1469 | m = gfc_match_name (name); |
1470 | ||
1471 | if (m != MATCH_YES) | |
1472 | goto cleanup; | |
1473 | if (gfc_match_char ('=') != MATCH_YES) | |
1474 | { | |
1475 | m = MATCH_NO; | |
1476 | goto cleanup; | |
1477 | } | |
1478 | ||
1479 | m = match_actual_arg (&actual->expr); | |
1480 | if (m != MATCH_YES) | |
1481 | goto cleanup; | |
1482 | ||
1483 | /* Make sure this name has not appeared yet. */ | |
1484 | ||
1485 | if (name[0] != '\0') | |
1486 | { | |
1487 | for (a = base; a; a = a->next) | |
cb9e4f55 | 1488 | if (a->name != NULL && strcmp (a->name, name) == 0) |
6de9cd9a | 1489 | { |
edf1eac2 SK |
1490 | gfc_error ("Keyword '%s' at %C has already appeared in the " |
1491 | "current argument list", name); | |
6de9cd9a DN |
1492 | return MATCH_ERROR; |
1493 | } | |
1494 | } | |
1495 | ||
cb9e4f55 | 1496 | actual->name = gfc_get_string (name); |
6de9cd9a DN |
1497 | return MATCH_YES; |
1498 | ||
1499 | cleanup: | |
63645982 | 1500 | gfc_current_locus = name_locus; |
6de9cd9a DN |
1501 | return m; |
1502 | } | |
1503 | ||
1504 | ||
7fcafa71 PT |
1505 | /* Match an argument list function, such as %VAL. */ |
1506 | ||
1507 | static match | |
1508 | match_arg_list_function (gfc_actual_arglist *result) | |
1509 | { | |
1510 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1511 | locus old_locus; | |
1512 | match m; | |
1513 | ||
1514 | old_locus = gfc_current_locus; | |
1515 | ||
1516 | if (gfc_match_char ('%') != MATCH_YES) | |
1517 | { | |
1518 | m = MATCH_NO; | |
1519 | goto cleanup; | |
1520 | } | |
1521 | ||
1522 | m = gfc_match ("%n (", name); | |
1523 | if (m != MATCH_YES) | |
1524 | goto cleanup; | |
1525 | ||
1526 | if (name[0] != '\0') | |
1527 | { | |
1528 | switch (name[0]) | |
1529 | { | |
1530 | case 'l': | |
edf1eac2 | 1531 | if (strncmp (name, "loc", 3) == 0) |
7fcafa71 PT |
1532 | { |
1533 | result->name = "%LOC"; | |
1534 | break; | |
1535 | } | |
1536 | case 'r': | |
edf1eac2 | 1537 | if (strncmp (name, "ref", 3) == 0) |
7fcafa71 PT |
1538 | { |
1539 | result->name = "%REF"; | |
1540 | break; | |
1541 | } | |
1542 | case 'v': | |
edf1eac2 | 1543 | if (strncmp (name, "val", 3) == 0) |
7fcafa71 PT |
1544 | { |
1545 | result->name = "%VAL"; | |
1546 | break; | |
1547 | } | |
1548 | default: | |
1549 | m = MATCH_ERROR; | |
1550 | goto cleanup; | |
1551 | } | |
1552 | } | |
1553 | ||
1554 | if (gfc_notify_std (GFC_STD_GNU, "Extension: argument list " | |
1555 | "function at %C") == FAILURE) | |
1556 | { | |
1557 | m = MATCH_ERROR; | |
1558 | goto cleanup; | |
1559 | } | |
1560 | ||
1561 | m = match_actual_arg (&result->expr); | |
1562 | if (m != MATCH_YES) | |
1563 | goto cleanup; | |
1564 | ||
1565 | if (gfc_match_char (')') != MATCH_YES) | |
1566 | { | |
1567 | m = MATCH_NO; | |
1568 | goto cleanup; | |
1569 | } | |
1570 | ||
1571 | return MATCH_YES; | |
1572 | ||
1573 | cleanup: | |
1574 | gfc_current_locus = old_locus; | |
1575 | return m; | |
1576 | } | |
1577 | ||
1578 | ||
6de9cd9a DN |
1579 | /* Matches an actual argument list of a function or subroutine, from |
1580 | the opening parenthesis to the closing parenthesis. The argument | |
1581 | list is assumed to allow keyword arguments because we don't know if | |
1582 | the symbol associated with the procedure has an implicit interface | |
ed5ee445 | 1583 | or not. We make sure keywords are unique. If sub_flag is set, |
d3fcc995 | 1584 | we're matching the argument list of a subroutine. */ |
6de9cd9a DN |
1585 | |
1586 | match | |
edf1eac2 | 1587 | gfc_match_actual_arglist (int sub_flag, gfc_actual_arglist **argp) |
6de9cd9a DN |
1588 | { |
1589 | gfc_actual_arglist *head, *tail; | |
1590 | int seen_keyword; | |
1591 | gfc_st_label *label; | |
1592 | locus old_loc; | |
1593 | match m; | |
1594 | ||
1595 | *argp = tail = NULL; | |
63645982 | 1596 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1597 | |
1598 | seen_keyword = 0; | |
1599 | ||
1600 | if (gfc_match_char ('(') == MATCH_NO) | |
1601 | return (sub_flag) ? MATCH_YES : MATCH_NO; | |
1602 | ||
1603 | if (gfc_match_char (')') == MATCH_YES) | |
1604 | return MATCH_YES; | |
1605 | head = NULL; | |
1606 | ||
1607 | for (;;) | |
1608 | { | |
1609 | if (head == NULL) | |
1610 | head = tail = gfc_get_actual_arglist (); | |
1611 | else | |
1612 | { | |
1613 | tail->next = gfc_get_actual_arglist (); | |
1614 | tail = tail->next; | |
1615 | } | |
1616 | ||
1617 | if (sub_flag && gfc_match_char ('*') == MATCH_YES) | |
1618 | { | |
a34a91f0 | 1619 | m = gfc_match_st_label (&label); |
6de9cd9a DN |
1620 | if (m == MATCH_NO) |
1621 | gfc_error ("Expected alternate return label at %C"); | |
1622 | if (m != MATCH_YES) | |
1623 | goto cleanup; | |
1624 | ||
1625 | tail->label = label; | |
1626 | goto next; | |
1627 | } | |
1628 | ||
1629 | /* After the first keyword argument is seen, the following | |
edf1eac2 | 1630 | arguments must also have keywords. */ |
6de9cd9a DN |
1631 | if (seen_keyword) |
1632 | { | |
1633 | m = match_keyword_arg (tail, head); | |
1634 | ||
1635 | if (m == MATCH_ERROR) | |
1636 | goto cleanup; | |
1637 | if (m == MATCH_NO) | |
1638 | { | |
edf1eac2 | 1639 | gfc_error ("Missing keyword name in actual argument list at %C"); |
6de9cd9a DN |
1640 | goto cleanup; |
1641 | } | |
1642 | ||
1643 | } | |
1644 | else | |
1645 | { | |
7fcafa71 PT |
1646 | /* Try an argument list function, like %VAL. */ |
1647 | m = match_arg_list_function (tail); | |
6de9cd9a DN |
1648 | if (m == MATCH_ERROR) |
1649 | goto cleanup; | |
1650 | ||
7fcafa71 PT |
1651 | /* See if we have the first keyword argument. */ |
1652 | if (m == MATCH_NO) | |
1653 | { | |
1654 | m = match_keyword_arg (tail, head); | |
1655 | if (m == MATCH_YES) | |
1656 | seen_keyword = 1; | |
1657 | if (m == MATCH_ERROR) | |
1658 | goto cleanup; | |
1659 | } | |
1660 | ||
6de9cd9a DN |
1661 | if (m == MATCH_NO) |
1662 | { | |
1663 | /* Try for a non-keyword argument. */ | |
1664 | m = match_actual_arg (&tail->expr); | |
1665 | if (m == MATCH_ERROR) | |
1666 | goto cleanup; | |
1667 | if (m == MATCH_NO) | |
1668 | goto syntax; | |
1669 | } | |
1670 | } | |
1671 | ||
7fcafa71 | 1672 | |
6de9cd9a DN |
1673 | next: |
1674 | if (gfc_match_char (')') == MATCH_YES) | |
1675 | break; | |
1676 | if (gfc_match_char (',') != MATCH_YES) | |
1677 | goto syntax; | |
1678 | } | |
1679 | ||
1680 | *argp = head; | |
1681 | return MATCH_YES; | |
1682 | ||
1683 | syntax: | |
1684 | gfc_error ("Syntax error in argument list at %C"); | |
1685 | ||
1686 | cleanup: | |
1687 | gfc_free_actual_arglist (head); | |
63645982 | 1688 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1689 | |
1690 | return MATCH_ERROR; | |
1691 | } | |
1692 | ||
1693 | ||
8e1f752a | 1694 | /* Used by gfc_match_varspec() to extend the reference list by one |
6de9cd9a DN |
1695 | element. */ |
1696 | ||
1697 | static gfc_ref * | |
edf1eac2 | 1698 | extend_ref (gfc_expr *primary, gfc_ref *tail) |
6de9cd9a | 1699 | { |
6de9cd9a DN |
1700 | if (primary->ref == NULL) |
1701 | primary->ref = tail = gfc_get_ref (); | |
1702 | else | |
1703 | { | |
1704 | if (tail == NULL) | |
1705 | gfc_internal_error ("extend_ref(): Bad tail"); | |
1706 | tail->next = gfc_get_ref (); | |
1707 | tail = tail->next; | |
1708 | } | |
1709 | ||
1710 | return tail; | |
1711 | } | |
1712 | ||
1713 | ||
1714 | /* Match any additional specifications associated with the current | |
1715 | variable like member references or substrings. If equiv_flag is | |
1716 | set we only match stuff that is allowed inside an EQUIVALENCE | |
8e1f752a | 1717 | statement. sub_flag tells whether we expect a type-bound procedure found |
713485cc JW |
1718 | to be a subroutine as part of CALL or a FUNCTION. For procedure pointer |
1719 | components, 'ppc_arg' determines whether the PPC may be called (with an | |
1720 | argument list), or whether it may just be referred to as a pointer. */ | |
6de9cd9a | 1721 | |
8e1f752a | 1722 | match |
713485cc JW |
1723 | gfc_match_varspec (gfc_expr *primary, int equiv_flag, bool sub_flag, |
1724 | bool ppc_arg) | |
6de9cd9a DN |
1725 | { |
1726 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1727 | gfc_ref *substring, *tail; | |
1728 | gfc_component *component; | |
a8006d09 | 1729 | gfc_symbol *sym = primary->symtree->n.sym; |
6de9cd9a | 1730 | match m; |
f2d3cb25 | 1731 | bool unknown; |
6de9cd9a DN |
1732 | |
1733 | tail = NULL; | |
1734 | ||
3c721513 | 1735 | gfc_gobble_whitespace (); |
d3a9eea2 TB |
1736 | |
1737 | if (gfc_peek_ascii_char () == '[') | |
1738 | { | |
1739 | if (sym->attr.dimension) | |
1740 | { | |
1741 | gfc_error ("Array section designator, e.g. '(:)', is required " | |
1742 | "besides the coarray designator '[...]' at %C"); | |
1743 | return MATCH_ERROR; | |
1744 | } | |
1745 | if (!sym->attr.codimension) | |
1746 | { | |
1747 | gfc_error ("Coarray designator at %C but '%s' is not a coarray", | |
1748 | sym->name); | |
1749 | return MATCH_ERROR; | |
1750 | } | |
1751 | } | |
1752 | ||
c74b74a8 | 1753 | if ((equiv_flag && gfc_peek_ascii_char () == '(') |
d3a9eea2 | 1754 | || gfc_peek_ascii_char () == '[' || sym->attr.codimension |
f64edc8b JW |
1755 | || (sym->attr.dimension && !sym->attr.proc_pointer |
1756 | && !gfc_is_proc_ptr_comp (primary, NULL) | |
1757 | && !(gfc_matching_procptr_assignment | |
cf2b3c22 TB |
1758 | && sym->attr.flavor == FL_PROCEDURE)) |
1759 | || (sym->ts.type == BT_CLASS | |
1760 | && sym->ts.u.derived->components->attr.dimension)) | |
6de9cd9a | 1761 | { |
a8006d09 JJ |
1762 | /* In EQUIVALENCE, we don't know yet whether we are seeing |
1763 | an array, character variable or array of character | |
edf1eac2 | 1764 | variables. We'll leave the decision till resolve time. */ |
6de9cd9a DN |
1765 | tail = extend_ref (primary, tail); |
1766 | tail->type = REF_ARRAY; | |
1767 | ||
a8006d09 | 1768 | m = gfc_match_array_ref (&tail->u.ar, equiv_flag ? NULL : sym->as, |
d3a9eea2 | 1769 | equiv_flag, sym->as ? sym->as->corank : 0); |
6de9cd9a DN |
1770 | if (m != MATCH_YES) |
1771 | return m; | |
a8006d09 | 1772 | |
3c721513 | 1773 | gfc_gobble_whitespace (); |
8fc541d3 | 1774 | if (equiv_flag && gfc_peek_ascii_char () == '(') |
a8006d09 JJ |
1775 | { |
1776 | tail = extend_ref (primary, tail); | |
1777 | tail->type = REF_ARRAY; | |
1778 | ||
d3a9eea2 | 1779 | m = gfc_match_array_ref (&tail->u.ar, NULL, equiv_flag, 0); |
a8006d09 JJ |
1780 | if (m != MATCH_YES) |
1781 | return m; | |
1782 | } | |
6de9cd9a DN |
1783 | } |
1784 | ||
6de9cd9a DN |
1785 | primary->ts = sym->ts; |
1786 | ||
a8006d09 JJ |
1787 | if (equiv_flag) |
1788 | return MATCH_YES; | |
1789 | ||
ebac6d9c | 1790 | if (sym->ts.type == BT_UNKNOWN && gfc_peek_ascii_char () == '%' |
713485cc | 1791 | && gfc_get_default_type (sym->name, sym->ns)->type == BT_DERIVED) |
ebac6d9c DK |
1792 | gfc_set_default_type (sym, 0, sym->ns); |
1793 | ||
cf2b3c22 TB |
1794 | if ((sym->ts.type != BT_DERIVED && sym->ts.type != BT_CLASS) |
1795 | || gfc_match_char ('%') != MATCH_YES) | |
6de9cd9a DN |
1796 | goto check_substring; |
1797 | ||
bc21d315 | 1798 | sym = sym->ts.u.derived; |
6de9cd9a DN |
1799 | |
1800 | for (;;) | |
1801 | { | |
8e1f752a | 1802 | gfc_try t; |
e157f736 | 1803 | gfc_symtree *tbp; |
8e1f752a | 1804 | |
6de9cd9a DN |
1805 | m = gfc_match_name (name); |
1806 | if (m == MATCH_NO) | |
1807 | gfc_error ("Expected structure component name at %C"); | |
1808 | if (m != MATCH_YES) | |
1809 | return MATCH_ERROR; | |
1810 | ||
b2acf594 PT |
1811 | if (sym->f2k_derived) |
1812 | tbp = gfc_find_typebound_proc (sym, &t, name, false, &gfc_current_locus); | |
1813 | else | |
1814 | tbp = NULL; | |
1815 | ||
8e1f752a DK |
1816 | if (tbp) |
1817 | { | |
1818 | gfc_symbol* tbp_sym; | |
1819 | ||
1820 | if (t == FAILURE) | |
1821 | return MATCH_ERROR; | |
1822 | ||
1823 | gcc_assert (!tail || !tail->next); | |
1824 | gcc_assert (primary->expr_type == EXPR_VARIABLE); | |
1825 | ||
e34ccb4c | 1826 | if (tbp->n.tb->is_generic) |
e157f736 DK |
1827 | tbp_sym = NULL; |
1828 | else | |
e34ccb4c | 1829 | tbp_sym = tbp->n.tb->u.specific->n.sym; |
8e1f752a DK |
1830 | |
1831 | primary->expr_type = EXPR_COMPCALL; | |
e34ccb4c | 1832 | primary->value.compcall.tbp = tbp->n.tb; |
e157f736 | 1833 | primary->value.compcall.name = tbp->name; |
4a44a72d DK |
1834 | primary->value.compcall.ignore_pass = 0; |
1835 | primary->value.compcall.assign = 0; | |
1836 | primary->value.compcall.base_object = NULL; | |
e157f736 DK |
1837 | gcc_assert (primary->symtree->n.sym->attr.referenced); |
1838 | if (tbp_sym) | |
1839 | primary->ts = tbp_sym->ts; | |
1840 | ||
e34ccb4c | 1841 | m = gfc_match_actual_arglist (tbp->n.tb->subroutine, |
8e1f752a DK |
1842 | &primary->value.compcall.actual); |
1843 | if (m == MATCH_ERROR) | |
1844 | return MATCH_ERROR; | |
1845 | if (m == MATCH_NO) | |
1846 | { | |
1847 | if (sub_flag) | |
1848 | primary->value.compcall.actual = NULL; | |
1849 | else | |
1850 | { | |
1851 | gfc_error ("Expected argument list at %C"); | |
1852 | return MATCH_ERROR; | |
1853 | } | |
1854 | } | |
1855 | ||
8e1f752a DK |
1856 | break; |
1857 | } | |
1858 | ||
9d1210f4 | 1859 | component = gfc_find_component (sym, name, false, false); |
6de9cd9a DN |
1860 | if (component == NULL) |
1861 | return MATCH_ERROR; | |
1862 | ||
1863 | tail = extend_ref (primary, tail); | |
1864 | tail->type = REF_COMPONENT; | |
1865 | ||
1866 | tail->u.c.component = component; | |
1867 | tail->u.c.sym = sym; | |
1868 | ||
1869 | primary->ts = component->ts; | |
1870 | ||
713485cc JW |
1871 | if (component->attr.proc_pointer && ppc_arg |
1872 | && !gfc_matching_procptr_assignment) | |
1873 | { | |
23878536 | 1874 | m = gfc_match_actual_arglist (sub_flag, |
713485cc JW |
1875 | &primary->value.compcall.actual); |
1876 | if (m == MATCH_ERROR) | |
1877 | return MATCH_ERROR; | |
23878536 JW |
1878 | if (m == MATCH_YES) |
1879 | primary->expr_type = EXPR_PPC; | |
713485cc JW |
1880 | |
1881 | break; | |
1882 | } | |
1883 | ||
c74b74a8 | 1884 | if (component->as != NULL && !component->attr.proc_pointer) |
6de9cd9a DN |
1885 | { |
1886 | tail = extend_ref (primary, tail); | |
1887 | tail->type = REF_ARRAY; | |
1888 | ||
d3a9eea2 TB |
1889 | m = gfc_match_array_ref (&tail->u.ar, component->as, equiv_flag, |
1890 | component->as->corank); | |
6de9cd9a DN |
1891 | if (m != MATCH_YES) |
1892 | return m; | |
1893 | } | |
cf2b3c22 TB |
1894 | else if (component->ts.type == BT_CLASS |
1895 | && component->ts.u.derived->components->as != NULL | |
1896 | && !component->attr.proc_pointer) | |
1897 | { | |
1898 | tail = extend_ref (primary, tail); | |
1899 | tail->type = REF_ARRAY; | |
6de9cd9a | 1900 | |
cf2b3c22 TB |
1901 | m = gfc_match_array_ref (&tail->u.ar, |
1902 | component->ts.u.derived->components->as, | |
d3a9eea2 TB |
1903 | equiv_flag, |
1904 | component->ts.u.derived->components->as->corank); | |
cf2b3c22 TB |
1905 | if (m != MATCH_YES) |
1906 | return m; | |
1907 | } | |
1908 | ||
1909 | if ((component->ts.type != BT_DERIVED && component->ts.type != BT_CLASS) | |
6de9cd9a DN |
1910 | || gfc_match_char ('%') != MATCH_YES) |
1911 | break; | |
1912 | ||
bc21d315 | 1913 | sym = component->ts.u.derived; |
6de9cd9a DN |
1914 | } |
1915 | ||
1916 | check_substring: | |
f2d3cb25 | 1917 | unknown = false; |
cf2b3c22 | 1918 | if (primary->ts.type == BT_UNKNOWN && sym->attr.flavor != FL_DERIVED) |
c040ffff | 1919 | { |
713485cc | 1920 | if (gfc_get_default_type (sym->name, sym->ns)->type == BT_CHARACTER) |
c040ffff | 1921 | { |
edf1eac2 SK |
1922 | gfc_set_default_type (sym, 0, sym->ns); |
1923 | primary->ts = sym->ts; | |
f2d3cb25 | 1924 | unknown = true; |
c040ffff TS |
1925 | } |
1926 | } | |
1927 | ||
6de9cd9a DN |
1928 | if (primary->ts.type == BT_CHARACTER) |
1929 | { | |
bc21d315 | 1930 | switch (match_substring (primary->ts.u.cl, equiv_flag, &substring)) |
6de9cd9a DN |
1931 | { |
1932 | case MATCH_YES: | |
1933 | if (tail == NULL) | |
1934 | primary->ref = substring; | |
1935 | else | |
1936 | tail->next = substring; | |
1937 | ||
1938 | if (primary->expr_type == EXPR_CONSTANT) | |
1939 | primary->expr_type = EXPR_SUBSTRING; | |
1940 | ||
860c8f3b | 1941 | if (substring) |
bc21d315 | 1942 | primary->ts.u.cl = NULL; |
860c8f3b | 1943 | |
6de9cd9a DN |
1944 | break; |
1945 | ||
1946 | case MATCH_NO: | |
f2d3cb25 | 1947 | if (unknown) |
858f1fa2 DK |
1948 | { |
1949 | gfc_clear_ts (&primary->ts); | |
1950 | gfc_clear_ts (&sym->ts); | |
1951 | } | |
6de9cd9a DN |
1952 | break; |
1953 | ||
1954 | case MATCH_ERROR: | |
1955 | return MATCH_ERROR; | |
1956 | } | |
1957 | } | |
1958 | ||
d3a9eea2 TB |
1959 | /* F2008, C727. */ |
1960 | if (primary->expr_type == EXPR_PPC && gfc_is_coindexed (primary)) | |
1961 | { | |
1962 | gfc_error ("Coindexed procedure-pointer component at %C"); | |
1963 | return MATCH_ERROR; | |
1964 | } | |
1965 | ||
6de9cd9a DN |
1966 | return MATCH_YES; |
1967 | } | |
1968 | ||
1969 | ||
1970 | /* Given an expression that is a variable, figure out what the | |
1971 | ultimate variable's type and attribute is, traversing the reference | |
1972 | structures if necessary. | |
1973 | ||
1974 | This subroutine is trickier than it looks. We start at the base | |
1975 | symbol and store the attribute. Component references load a | |
1976 | completely new attribute. | |
1977 | ||
1978 | A couple of rules come into play. Subobjects of targets are always | |
1979 | targets themselves. If we see a component that goes through a | |
1980 | pointer, then the expression must also be a target, since the | |
1981 | pointer is associated with something (if it isn't core will soon be | |
1982 | dumped). If we see a full part or section of an array, the | |
1983 | expression is also an array. | |
1984 | ||
f7b529fa | 1985 | We can have at most one full array reference. */ |
6de9cd9a DN |
1986 | |
1987 | symbol_attribute | |
edf1eac2 | 1988 | gfc_variable_attr (gfc_expr *expr, gfc_typespec *ts) |
6de9cd9a | 1989 | { |
5046aff5 | 1990 | int dimension, pointer, allocatable, target; |
6de9cd9a DN |
1991 | symbol_attribute attr; |
1992 | gfc_ref *ref; | |
cf2b3c22 TB |
1993 | gfc_symbol *sym; |
1994 | gfc_component *comp; | |
6de9cd9a | 1995 | |
50dbf0b4 | 1996 | if (expr->expr_type != EXPR_VARIABLE && expr->expr_type != EXPR_FUNCTION) |
6de9cd9a DN |
1997 | gfc_internal_error ("gfc_variable_attr(): Expression isn't a variable"); |
1998 | ||
1999 | ref = expr->ref; | |
cf2b3c22 TB |
2000 | sym = expr->symtree->n.sym; |
2001 | attr = sym->attr; | |
6de9cd9a | 2002 | |
cf2b3c22 TB |
2003 | if (sym->ts.type == BT_CLASS) |
2004 | { | |
2005 | dimension = sym->ts.u.derived->components->attr.dimension; | |
2006 | pointer = sym->ts.u.derived->components->attr.pointer; | |
2007 | allocatable = sym->ts.u.derived->components->attr.allocatable; | |
2008 | } | |
2009 | else | |
2010 | { | |
2011 | dimension = attr.dimension; | |
2012 | pointer = attr.pointer; | |
2013 | allocatable = attr.allocatable; | |
2014 | } | |
6de9cd9a DN |
2015 | |
2016 | target = attr.target; | |
713485cc | 2017 | if (pointer || attr.proc_pointer) |
6de9cd9a DN |
2018 | target = 1; |
2019 | ||
2020 | if (ts != NULL && expr->ts.type == BT_UNKNOWN) | |
cf2b3c22 | 2021 | *ts = sym->ts; |
6de9cd9a DN |
2022 | |
2023 | for (; ref; ref = ref->next) | |
2024 | switch (ref->type) | |
2025 | { | |
2026 | case REF_ARRAY: | |
2027 | ||
2028 | switch (ref->u.ar.type) | |
2029 | { | |
2030 | case AR_FULL: | |
2031 | dimension = 1; | |
2032 | break; | |
2033 | ||
2034 | case AR_SECTION: | |
5046aff5 | 2035 | allocatable = pointer = 0; |
6de9cd9a DN |
2036 | dimension = 1; |
2037 | break; | |
2038 | ||
2039 | case AR_ELEMENT: | |
d3a9eea2 TB |
2040 | /* Handle coarrays. */ |
2041 | if (ref->u.ar.dimen > 0) | |
2042 | allocatable = pointer = 0; | |
6de9cd9a DN |
2043 | break; |
2044 | ||
2045 | case AR_UNKNOWN: | |
2046 | gfc_internal_error ("gfc_variable_attr(): Bad array reference"); | |
2047 | } | |
2048 | ||
2049 | break; | |
2050 | ||
2051 | case REF_COMPONENT: | |
cf2b3c22 TB |
2052 | comp = ref->u.c.component; |
2053 | attr = comp->attr; | |
6de9cd9a | 2054 | if (ts != NULL) |
e8a25349 | 2055 | { |
cf2b3c22 | 2056 | *ts = comp->ts; |
e8a25349 TS |
2057 | /* Don't set the string length if a substring reference |
2058 | follows. */ | |
2059 | if (ts->type == BT_CHARACTER | |
2060 | && ref->next && ref->next->type == REF_SUBSTRING) | |
bc21d315 | 2061 | ts->u.cl = NULL; |
e8a25349 | 2062 | } |
6de9cd9a | 2063 | |
cf2b3c22 TB |
2064 | if (comp->ts.type == BT_CLASS) |
2065 | { | |
2066 | pointer = comp->ts.u.derived->components->attr.pointer; | |
2067 | allocatable = comp->ts.u.derived->components->attr.allocatable; | |
2068 | } | |
2069 | else | |
2070 | { | |
2071 | pointer = comp->attr.pointer; | |
2072 | allocatable = comp->attr.allocatable; | |
2073 | } | |
713485cc | 2074 | if (pointer || attr.proc_pointer) |
6de9cd9a DN |
2075 | target = 1; |
2076 | ||
2077 | break; | |
2078 | ||
2079 | case REF_SUBSTRING: | |
5046aff5 | 2080 | allocatable = pointer = 0; |
6de9cd9a DN |
2081 | break; |
2082 | } | |
2083 | ||
2084 | attr.dimension = dimension; | |
2085 | attr.pointer = pointer; | |
5046aff5 | 2086 | attr.allocatable = allocatable; |
6de9cd9a DN |
2087 | attr.target = target; |
2088 | ||
2089 | return attr; | |
2090 | } | |
2091 | ||
2092 | ||
2093 | /* Return the attribute from a general expression. */ | |
2094 | ||
2095 | symbol_attribute | |
edf1eac2 | 2096 | gfc_expr_attr (gfc_expr *e) |
6de9cd9a DN |
2097 | { |
2098 | symbol_attribute attr; | |
2099 | ||
2100 | switch (e->expr_type) | |
2101 | { | |
2102 | case EXPR_VARIABLE: | |
2103 | attr = gfc_variable_attr (e, NULL); | |
2104 | break; | |
2105 | ||
2106 | case EXPR_FUNCTION: | |
2107 | gfc_clear_attr (&attr); | |
2108 | ||
2109 | if (e->value.function.esym != NULL) | |
cf2b3c22 TB |
2110 | { |
2111 | gfc_symbol *sym = e->value.function.esym->result; | |
2112 | attr = sym->attr; | |
2113 | if (sym->ts.type == BT_CLASS) | |
2114 | { | |
2115 | attr.dimension = sym->ts.u.derived->components->attr.dimension; | |
2116 | attr.pointer = sym->ts.u.derived->components->attr.pointer; | |
2117 | attr.allocatable = sym->ts.u.derived->components->attr.allocatable; | |
2118 | } | |
2119 | } | |
50dbf0b4 JW |
2120 | else |
2121 | attr = gfc_variable_attr (e, NULL); | |
6de9cd9a DN |
2122 | |
2123 | /* TODO: NULL() returns pointers. May have to take care of this | |
edf1eac2 | 2124 | here. */ |
6de9cd9a DN |
2125 | |
2126 | break; | |
2127 | ||
2128 | default: | |
2129 | gfc_clear_attr (&attr); | |
2130 | break; | |
2131 | } | |
2132 | ||
2133 | return attr; | |
2134 | } | |
2135 | ||
2136 | ||
2137 | /* Match a structure constructor. The initial symbol has already been | |
2138 | seen. */ | |
2139 | ||
fa9290d3 DK |
2140 | typedef struct gfc_structure_ctor_component |
2141 | { | |
2142 | char* name; | |
2143 | gfc_expr* val; | |
2144 | locus where; | |
2145 | struct gfc_structure_ctor_component* next; | |
2146 | } | |
2147 | gfc_structure_ctor_component; | |
2148 | ||
ece3f663 | 2149 | #define gfc_get_structure_ctor_component() XCNEW (gfc_structure_ctor_component) |
fa9290d3 DK |
2150 | |
2151 | static void | |
2152 | gfc_free_structure_ctor_component (gfc_structure_ctor_component *comp) | |
2153 | { | |
2154 | gfc_free (comp->name); | |
2155 | gfc_free_expr (comp->val); | |
2156 | } | |
2157 | ||
7d1f1e61 PT |
2158 | |
2159 | /* Translate the component list into the actual constructor by sorting it in | |
2160 | the order required; this also checks along the way that each and every | |
2161 | component actually has an initializer and handles default initializers | |
2162 | for components without explicit value given. */ | |
2163 | static gfc_try | |
2164 | build_actual_constructor (gfc_structure_ctor_component **comp_head, | |
b7e75771 | 2165 | gfc_constructor_base *ctor_head, gfc_symbol *sym) |
6de9cd9a | 2166 | { |
fa9290d3 | 2167 | gfc_structure_ctor_component *comp_iter; |
7d1f1e61 PT |
2168 | gfc_component *comp; |
2169 | ||
2170 | for (comp = sym->components; comp; comp = comp->next) | |
2171 | { | |
2172 | gfc_structure_ctor_component **next_ptr; | |
2173 | gfc_expr *value = NULL; | |
2174 | ||
2175 | /* Try to find the initializer for the current component by name. */ | |
2176 | next_ptr = comp_head; | |
2177 | for (comp_iter = *comp_head; comp_iter; comp_iter = comp_iter->next) | |
2178 | { | |
2179 | if (!strcmp (comp_iter->name, comp->name)) | |
2180 | break; | |
2181 | next_ptr = &comp_iter->next; | |
2182 | } | |
2183 | ||
2184 | /* If an extension, try building the parent derived type by building | |
2185 | a value expression for the parent derived type and calling self. */ | |
2186 | if (!comp_iter && comp == sym->components && sym->attr.extension) | |
2187 | { | |
b7e75771 JD |
2188 | value = gfc_get_structure_constructor_expr (comp->ts.type, |
2189 | comp->ts.kind, | |
2190 | &gfc_current_locus); | |
7d1f1e61 | 2191 | value->ts = comp->ts; |
7d1f1e61 PT |
2192 | |
2193 | if (build_actual_constructor (comp_head, &value->value.constructor, | |
bc21d315 | 2194 | comp->ts.u.derived) == FAILURE) |
7d1f1e61 PT |
2195 | { |
2196 | gfc_free_expr (value); | |
2197 | return FAILURE; | |
2198 | } | |
b7e75771 JD |
2199 | |
2200 | gfc_constructor_append_expr (ctor_head, value, NULL); | |
7d1f1e61 PT |
2201 | continue; |
2202 | } | |
2203 | ||
2204 | /* If it was not found, try the default initializer if there's any; | |
2205 | otherwise, it's an error. */ | |
2206 | if (!comp_iter) | |
2207 | { | |
2208 | if (comp->initializer) | |
2209 | { | |
2210 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Structure" | |
2211 | " constructor with missing optional arguments" | |
2212 | " at %C") == FAILURE) | |
2213 | return FAILURE; | |
2214 | value = gfc_copy_expr (comp->initializer); | |
2215 | } | |
2216 | else | |
2217 | { | |
2218 | gfc_error ("No initializer for component '%s' given in the" | |
2219 | " structure constructor at %C!", comp->name); | |
2220 | return FAILURE; | |
2221 | } | |
2222 | } | |
2223 | else | |
2224 | value = comp_iter->val; | |
2225 | ||
2226 | /* Add the value to the constructor chain built. */ | |
b7e75771 | 2227 | gfc_constructor_append_expr (ctor_head, value, NULL); |
7d1f1e61 PT |
2228 | |
2229 | /* Remove the entry from the component list. We don't want the expression | |
2230 | value to be free'd, so set it to NULL. */ | |
2231 | if (comp_iter) | |
2232 | { | |
2233 | *next_ptr = comp_iter->next; | |
2234 | comp_iter->val = NULL; | |
2235 | gfc_free_structure_ctor_component (comp_iter); | |
2236 | } | |
2237 | } | |
2238 | return SUCCESS; | |
2239 | } | |
2240 | ||
2241 | match | |
52f49934 DK |
2242 | gfc_match_structure_constructor (gfc_symbol *sym, gfc_expr **result, |
2243 | bool parent) | |
7d1f1e61 PT |
2244 | { |
2245 | gfc_structure_ctor_component *comp_tail, *comp_head, *comp_iter; | |
b7e75771 | 2246 | gfc_constructor_base ctor_head = NULL; |
fa9290d3 | 2247 | gfc_component *comp; /* Is set NULL when named component is first seen */ |
6de9cd9a DN |
2248 | gfc_expr *e; |
2249 | locus where; | |
2250 | match m; | |
fa9290d3 | 2251 | const char* last_name = NULL; |
6de9cd9a | 2252 | |
7d1f1e61 | 2253 | comp_tail = comp_head = NULL; |
6de9cd9a | 2254 | |
7d1f1e61 | 2255 | if (!parent && gfc_match_char ('(') != MATCH_YES) |
6de9cd9a DN |
2256 | goto syntax; |
2257 | ||
63645982 | 2258 | where = gfc_current_locus; |
6de9cd9a | 2259 | |
9d1210f4 | 2260 | gfc_find_component (sym, NULL, false, true); |
6de9cd9a | 2261 | |
52f49934 DK |
2262 | /* Check that we're not about to construct an ABSTRACT type. */ |
2263 | if (!parent && sym->attr.abstract) | |
2264 | { | |
2265 | gfc_error ("Can't construct ABSTRACT type '%s' at %C", sym->name); | |
2266 | return MATCH_ERROR; | |
2267 | } | |
2268 | ||
fa9290d3 DK |
2269 | /* Match the component list and store it in a list together with the |
2270 | corresponding component names. Check for empty argument list first. */ | |
2271 | if (gfc_match_char (')') != MATCH_YES) | |
6de9cd9a | 2272 | { |
fa9290d3 DK |
2273 | comp = sym->components; |
2274 | do | |
2eae3dc7 | 2275 | { |
fa9290d3 | 2276 | gfc_component *this_comp = NULL; |
6de9cd9a | 2277 | |
fa9290d3 DK |
2278 | if (!comp_head) |
2279 | comp_tail = comp_head = gfc_get_structure_ctor_component (); | |
2280 | else | |
2281 | { | |
2282 | comp_tail->next = gfc_get_structure_ctor_component (); | |
2283 | comp_tail = comp_tail->next; | |
2284 | } | |
ece3f663 | 2285 | comp_tail->name = XCNEWVEC (char, GFC_MAX_SYMBOL_LEN + 1); |
fa9290d3 DK |
2286 | comp_tail->val = NULL; |
2287 | comp_tail->where = gfc_current_locus; | |
6de9cd9a | 2288 | |
fa9290d3 DK |
2289 | /* Try matching a component name. */ |
2290 | if (gfc_match_name (comp_tail->name) == MATCH_YES | |
2291 | && gfc_match_char ('=') == MATCH_YES) | |
2292 | { | |
2293 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Structure" | |
2294 | " constructor with named arguments at %C") | |
2295 | == FAILURE) | |
2296 | goto cleanup; | |
2297 | ||
2298 | last_name = comp_tail->name; | |
2299 | comp = NULL; | |
2300 | } | |
2301 | else | |
2302 | { | |
2303 | /* Components without name are not allowed after the first named | |
2304 | component initializer! */ | |
2305 | if (!comp) | |
2306 | { | |
2307 | if (last_name) | |
2308 | gfc_error ("Component initializer without name after" | |
2309 | " component named %s at %C!", last_name); | |
7d1f1e61 | 2310 | else if (!parent) |
fa9290d3 DK |
2311 | gfc_error ("Too many components in structure constructor at" |
2312 | " %C!"); | |
2313 | goto cleanup; | |
2314 | } | |
2315 | ||
2316 | gfc_current_locus = comp_tail->where; | |
2317 | strncpy (comp_tail->name, comp->name, GFC_MAX_SYMBOL_LEN + 1); | |
2318 | } | |
2319 | ||
9d1210f4 DK |
2320 | /* Find the current component in the structure definition and check |
2321 | its access is not private. */ | |
fa9290d3 | 2322 | if (comp) |
9d1210f4 | 2323 | this_comp = gfc_find_component (sym, comp->name, false, false); |
fa9290d3 DK |
2324 | else |
2325 | { | |
9d1210f4 DK |
2326 | this_comp = gfc_find_component (sym, |
2327 | (const char *)comp_tail->name, | |
2328 | false, false); | |
fa9290d3 | 2329 | comp = NULL; /* Reset needed! */ |
fa9290d3 | 2330 | } |
fa9290d3 | 2331 | |
7d1f1e61 PT |
2332 | /* Here we can check if a component name is given which does not |
2333 | correspond to any component of the defined structure. */ | |
2334 | if (!this_comp) | |
2335 | goto cleanup; | |
6de9cd9a | 2336 | |
fa9290d3 DK |
2337 | /* Check if this component is already given a value. */ |
2338 | for (comp_iter = comp_head; comp_iter != comp_tail; | |
2339 | comp_iter = comp_iter->next) | |
2340 | { | |
2341 | gcc_assert (comp_iter); | |
2342 | if (!strcmp (comp_iter->name, comp_tail->name)) | |
2343 | { | |
2344 | gfc_error ("Component '%s' is initialized twice in the" | |
2345 | " structure constructor at %C!", comp_tail->name); | |
2346 | goto cleanup; | |
2347 | } | |
2348 | } | |
2349 | ||
2350 | /* Match the current initializer expression. */ | |
2351 | m = gfc_match_expr (&comp_tail->val); | |
2352 | if (m == MATCH_NO) | |
2353 | goto syntax; | |
2354 | if (m == MATCH_ERROR) | |
2355 | goto cleanup; | |
2356 | ||
d3a9eea2 TB |
2357 | /* F2008, R457/C725, for PURE C1283. */ |
2358 | if (this_comp->attr.pointer && gfc_is_coindexed (comp_tail->val)) | |
2359 | { | |
2360 | gfc_error ("Coindexed expression to pointer component '%s' in " | |
2361 | "structure constructor at %C!", comp_tail->name); | |
2362 | goto cleanup; | |
2363 | } | |
2364 | ||
2365 | ||
7d1f1e61 PT |
2366 | /* If not explicitly a parent constructor, gather up the components |
2367 | and build one. */ | |
2368 | if (comp && comp == sym->components | |
2369 | && sym->attr.extension | |
2370 | && (comp_tail->val->ts.type != BT_DERIVED | |
2371 | || | |
bc21d315 | 2372 | comp_tail->val->ts.u.derived != this_comp->ts.u.derived)) |
7d1f1e61 PT |
2373 | { |
2374 | gfc_current_locus = where; | |
2375 | gfc_free_expr (comp_tail->val); | |
52f49934 | 2376 | comp_tail->val = NULL; |
6de9cd9a | 2377 | |
bc21d315 | 2378 | m = gfc_match_structure_constructor (comp->ts.u.derived, |
7d1f1e61 PT |
2379 | &comp_tail->val, true); |
2380 | if (m == MATCH_NO) | |
2381 | goto syntax; | |
2382 | if (m == MATCH_ERROR) | |
2383 | goto cleanup; | |
2384 | } | |
6de9cd9a | 2385 | |
7d1f1e61 PT |
2386 | if (comp) |
2387 | comp = comp->next; | |
2eae3dc7 | 2388 | |
7d1f1e61 | 2389 | if (parent && !comp) |
fa9290d3 | 2390 | break; |
fa9290d3 | 2391 | } |
fa9290d3 | 2392 | |
7d1f1e61 | 2393 | while (gfc_match_char (',') == MATCH_YES); |
fa9290d3 | 2394 | |
7d1f1e61 PT |
2395 | if (!parent && gfc_match_char (')') != MATCH_YES) |
2396 | goto syntax; | |
6de9cd9a DN |
2397 | } |
2398 | ||
7d1f1e61 PT |
2399 | if (build_actual_constructor (&comp_head, &ctor_head, sym) == FAILURE) |
2400 | goto cleanup; | |
2401 | ||
fa9290d3 DK |
2402 | /* No component should be left, as this should have caused an error in the |
2403 | loop constructing the component-list (name that does not correspond to any | |
2404 | component in the structure definition). */ | |
7d1f1e61 PT |
2405 | if (comp_head && sym->attr.extension) |
2406 | { | |
2407 | for (comp_iter = comp_head; comp_iter; comp_iter = comp_iter->next) | |
2408 | { | |
2409 | gfc_error ("component '%s' at %L has already been set by a " | |
2410 | "parent derived type constructor", comp_iter->name, | |
2411 | &comp_iter->where); | |
2412 | } | |
2413 | goto cleanup; | |
2414 | } | |
2415 | else | |
2416 | gcc_assert (!comp_head); | |
fa9290d3 | 2417 | |
b7e75771 | 2418 | e = gfc_get_structure_constructor_expr (BT_DERIVED, 0, &where); |
bc21d315 | 2419 | e->ts.u.derived = sym; |
fa9290d3 | 2420 | e->value.constructor = ctor_head; |
6de9cd9a DN |
2421 | |
2422 | *result = e; | |
2423 | return MATCH_YES; | |
2424 | ||
2425 | syntax: | |
2426 | gfc_error ("Syntax error in structure constructor at %C"); | |
2427 | ||
2428 | cleanup: | |
fa9290d3 DK |
2429 | for (comp_iter = comp_head; comp_iter; ) |
2430 | { | |
2431 | gfc_structure_ctor_component *next = comp_iter->next; | |
2432 | gfc_free_structure_ctor_component (comp_iter); | |
2433 | comp_iter = next; | |
2434 | } | |
b7e75771 | 2435 | gfc_constructor_free (ctor_head); |
6de9cd9a DN |
2436 | return MATCH_ERROR; |
2437 | } | |
2438 | ||
2439 | ||
9a3db5a3 PT |
2440 | /* If the symbol is an implicit do loop index and implicitly typed, |
2441 | it should not be host associated. Provide a symtree from the | |
2442 | current namespace. */ | |
2443 | static match | |
2444 | check_for_implicit_index (gfc_symtree **st, gfc_symbol **sym) | |
2445 | { | |
2446 | if ((*sym)->attr.flavor == FL_VARIABLE | |
2447 | && (*sym)->ns != gfc_current_ns | |
2448 | && (*sym)->attr.implied_index | |
2449 | && (*sym)->attr.implicit_type | |
2450 | && !(*sym)->attr.use_assoc) | |
2451 | { | |
2452 | int i; | |
08a6b8e0 | 2453 | i = gfc_get_sym_tree ((*sym)->name, NULL, st, false); |
9a3db5a3 PT |
2454 | if (i) |
2455 | return MATCH_ERROR; | |
2456 | *sym = (*st)->n.sym; | |
2457 | } | |
2458 | return MATCH_YES; | |
2459 | } | |
2460 | ||
2461 | ||
3070bab4 JW |
2462 | /* Procedure pointer as function result: Replace the function symbol by the |
2463 | auto-generated hidden result variable named "ppr@". */ | |
2464 | ||
2465 | static gfc_try | |
2466 | replace_hidden_procptr_result (gfc_symbol **sym, gfc_symtree **st) | |
2467 | { | |
2468 | /* Check for procedure pointer result variable. */ | |
2469 | if ((*sym)->attr.function && !(*sym)->attr.external | |
2470 | && (*sym)->result && (*sym)->result != *sym | |
2471 | && (*sym)->result->attr.proc_pointer | |
2472 | && (*sym) == gfc_current_ns->proc_name | |
2473 | && (*sym) == (*sym)->result->ns->proc_name | |
2474 | && strcmp ("ppr@", (*sym)->result->name) == 0) | |
2475 | { | |
2476 | /* Automatic replacement with "hidden" result variable. */ | |
2477 | (*sym)->result->attr.referenced = (*sym)->attr.referenced; | |
2478 | *sym = (*sym)->result; | |
2479 | *st = gfc_find_symtree ((*sym)->ns->sym_root, (*sym)->name); | |
2480 | return SUCCESS; | |
2481 | } | |
2482 | return FAILURE; | |
2483 | } | |
2484 | ||
2485 | ||
6de9cd9a DN |
2486 | /* Matches a variable name followed by anything that might follow it-- |
2487 | array reference, argument list of a function, etc. */ | |
2488 | ||
2489 | match | |
edf1eac2 | 2490 | gfc_match_rvalue (gfc_expr **result) |
6de9cd9a DN |
2491 | { |
2492 | gfc_actual_arglist *actual_arglist; | |
d3fcc995 | 2493 | char name[GFC_MAX_SYMBOL_LEN + 1], argname[GFC_MAX_SYMBOL_LEN + 1]; |
6de9cd9a DN |
2494 | gfc_state_data *st; |
2495 | gfc_symbol *sym; | |
2496 | gfc_symtree *symtree; | |
d3fcc995 | 2497 | locus where, old_loc; |
6de9cd9a | 2498 | gfc_expr *e; |
d3fcc995 | 2499 | match m, m2; |
6de9cd9a | 2500 | int i; |
5270c302 AL |
2501 | gfc_typespec *ts; |
2502 | bool implicit_char; | |
a99288e5 | 2503 | gfc_ref *ref; |
6de9cd9a DN |
2504 | |
2505 | m = gfc_match_name (name); | |
2506 | if (m != MATCH_YES) | |
2507 | return m; | |
2508 | ||
2a6dcee5 TB |
2509 | if (gfc_find_state (COMP_INTERFACE) == SUCCESS |
2510 | && !gfc_current_ns->has_import_set) | |
08a6b8e0 | 2511 | i = gfc_get_sym_tree (name, NULL, &symtree, false); |
6de9cd9a DN |
2512 | else |
2513 | i = gfc_get_ha_sym_tree (name, &symtree); | |
2514 | ||
2515 | if (i) | |
2516 | return MATCH_ERROR; | |
2517 | ||
2518 | sym = symtree->n.sym; | |
2519 | e = NULL; | |
63645982 | 2520 | where = gfc_current_locus; |
6de9cd9a | 2521 | |
3070bab4 JW |
2522 | replace_hidden_procptr_result (&sym, &symtree); |
2523 | ||
9a3db5a3 PT |
2524 | /* If this is an implicit do loop index and implicitly typed, |
2525 | it should not be host associated. */ | |
2526 | m = check_for_implicit_index (&symtree, &sym); | |
2527 | if (m != MATCH_YES) | |
2528 | return m; | |
2529 | ||
6de9cd9a | 2530 | gfc_set_sym_referenced (sym); |
9a3db5a3 | 2531 | sym->attr.implied_index = 0; |
6de9cd9a | 2532 | |
0921bc44 JJ |
2533 | if (sym->attr.function && sym->result == sym) |
2534 | { | |
811849c0 PT |
2535 | /* See if this is a directly recursive function call. */ |
2536 | gfc_gobble_whitespace (); | |
2537 | if (sym->attr.recursive | |
8fc541d3 | 2538 | && gfc_peek_ascii_char () == '(' |
fc2d8680 PT |
2539 | && gfc_current_ns->proc_name == sym |
2540 | && !sym->attr.dimension) | |
811849c0 | 2541 | { |
fc2d8680 PT |
2542 | gfc_error ("'%s' at %C is the name of a recursive function " |
2543 | "and so refers to the result variable. Use an " | |
2544 | "explicit RESULT variable for direct recursion " | |
2545 | "(12.5.2.1)", sym->name); | |
811849c0 PT |
2546 | return MATCH_ERROR; |
2547 | } | |
fc2d8680 | 2548 | |
2d71b918 | 2549 | if (gfc_is_function_return_value (sym, gfc_current_ns)) |
0921bc44 JJ |
2550 | goto variable; |
2551 | ||
2552 | if (sym->attr.entry | |
2553 | && (sym->ns == gfc_current_ns | |
2554 | || sym->ns == gfc_current_ns->parent)) | |
2555 | { | |
2556 | gfc_entry_list *el = NULL; | |
2557 | ||
2558 | for (el = sym->ns->entries; el; el = el->next) | |
2559 | if (sym == el->sym) | |
2560 | goto variable; | |
2561 | } | |
2562 | } | |
6de9cd9a | 2563 | |
8fb74da4 JW |
2564 | if (gfc_matching_procptr_assignment) |
2565 | goto procptr0; | |
2566 | ||
6de9cd9a DN |
2567 | if (sym->attr.function || sym->attr.external || sym->attr.intrinsic) |
2568 | goto function0; | |
2569 | ||
2570 | if (sym->attr.generic) | |
2571 | goto generic_function; | |
2572 | ||
2573 | switch (sym->attr.flavor) | |
2574 | { | |
2575 | case FL_VARIABLE: | |
2576 | variable: | |
6de9cd9a DN |
2577 | e = gfc_get_expr (); |
2578 | ||
2579 | e->expr_type = EXPR_VARIABLE; | |
2580 | e->symtree = symtree; | |
2581 | ||
713485cc | 2582 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
2583 | break; |
2584 | ||
2585 | case FL_PARAMETER: | |
b7263e8f EE |
2586 | /* A statement of the form "REAL, parameter :: a(0:10) = 1" will |
2587 | end up here. Unfortunately, sym->value->expr_type is set to | |
2588 | EXPR_CONSTANT, and so the if () branch would be followed without | |
2589 | the !sym->as check. */ | |
2590 | if (sym->value && sym->value->expr_type != EXPR_ARRAY && !sym->as) | |
6de9cd9a DN |
2591 | e = gfc_copy_expr (sym->value); |
2592 | else | |
2593 | { | |
2594 | e = gfc_get_expr (); | |
2595 | e->expr_type = EXPR_VARIABLE; | |
2596 | } | |
2597 | ||
2598 | e->symtree = symtree; | |
713485cc | 2599 | m = gfc_match_varspec (e, 0, false, true); |
a99288e5 PT |
2600 | |
2601 | if (sym->ts.is_c_interop || sym->ts.is_iso_c) | |
2602 | break; | |
2603 | ||
927171bf PT |
2604 | /* Variable array references to derived type parameters cause |
2605 | all sorts of headaches in simplification. Treating such | |
2606 | expressions as variable works just fine for all array | |
2607 | references. */ | |
2608 | if (sym->value && sym->ts.type == BT_DERIVED && e->ref) | |
a99288e5 PT |
2609 | { |
2610 | for (ref = e->ref; ref; ref = ref->next) | |
2611 | if (ref->type == REF_ARRAY) | |
2612 | break; | |
2613 | ||
927171bf | 2614 | if (ref == NULL || ref->u.ar.type == AR_FULL) |
a99288e5 PT |
2615 | break; |
2616 | ||
2617 | ref = e->ref; | |
2618 | e->ref = NULL; | |
2619 | gfc_free_expr (e); | |
2620 | e = gfc_get_expr (); | |
2621 | e->expr_type = EXPR_VARIABLE; | |
2622 | e->symtree = symtree; | |
2623 | e->ref = ref; | |
a99288e5 PT |
2624 | } |
2625 | ||
6de9cd9a DN |
2626 | break; |
2627 | ||
2628 | case FL_DERIVED: | |
2629 | sym = gfc_use_derived (sym); | |
2630 | if (sym == NULL) | |
2631 | m = MATCH_ERROR; | |
2632 | else | |
7d1f1e61 | 2633 | m = gfc_match_structure_constructor (sym, &e, false); |
6de9cd9a DN |
2634 | break; |
2635 | ||
2636 | /* If we're here, then the name is known to be the name of a | |
2637 | procedure, yet it is not sure to be the name of a function. */ | |
2638 | case FL_PROCEDURE: | |
8fb74da4 JW |
2639 | |
2640 | /* Procedure Pointer Assignments. */ | |
2641 | procptr0: | |
2642 | if (gfc_matching_procptr_assignment) | |
2643 | { | |
2644 | gfc_gobble_whitespace (); | |
e35bbb23 | 2645 | if (!sym->attr.dimension && gfc_peek_ascii_char () == '(') |
8fb74da4 JW |
2646 | /* Parse functions returning a procptr. */ |
2647 | goto function0; | |
2648 | ||
c3005b0f DK |
2649 | if (gfc_is_intrinsic (sym, 0, gfc_current_locus) |
2650 | || gfc_is_intrinsic (sym, 1, gfc_current_locus)) | |
8fb74da4 JW |
2651 | sym->attr.intrinsic = 1; |
2652 | e = gfc_get_expr (); | |
2653 | e->expr_type = EXPR_VARIABLE; | |
2654 | e->symtree = symtree; | |
713485cc | 2655 | m = gfc_match_varspec (e, 0, false, true); |
8fb74da4 JW |
2656 | break; |
2657 | } | |
2658 | ||
6de9cd9a DN |
2659 | if (sym->attr.subroutine) |
2660 | { | |
2661 | gfc_error ("Unexpected use of subroutine name '%s' at %C", | |
2662 | sym->name); | |
2663 | m = MATCH_ERROR; | |
2664 | break; | |
2665 | } | |
2666 | ||
2667 | /* At this point, the name has to be a non-statement function. | |
edf1eac2 SK |
2668 | If the name is the same as the current function being |
2669 | compiled, then we have a variable reference (to the function | |
2670 | result) if the name is non-recursive. */ | |
6de9cd9a DN |
2671 | |
2672 | st = gfc_enclosing_unit (NULL); | |
2673 | ||
2674 | if (st != NULL && st->state == COMP_FUNCTION | |
2675 | && st->sym == sym | |
2676 | && !sym->attr.recursive) | |
2677 | { | |
2678 | e = gfc_get_expr (); | |
2679 | e->symtree = symtree; | |
2680 | e->expr_type = EXPR_VARIABLE; | |
2681 | ||
713485cc | 2682 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
2683 | break; |
2684 | } | |
2685 | ||
2686 | /* Match a function reference. */ | |
2687 | function0: | |
2688 | m = gfc_match_actual_arglist (0, &actual_arglist); | |
2689 | if (m == MATCH_NO) | |
2690 | { | |
2691 | if (sym->attr.proc == PROC_ST_FUNCTION) | |
2692 | gfc_error ("Statement function '%s' requires argument list at %C", | |
2693 | sym->name); | |
2694 | else | |
2695 | gfc_error ("Function '%s' requires an argument list at %C", | |
2696 | sym->name); | |
2697 | ||
2698 | m = MATCH_ERROR; | |
2699 | break; | |
2700 | } | |
2701 | ||
2702 | if (m != MATCH_YES) | |
2703 | { | |
2704 | m = MATCH_ERROR; | |
2705 | break; | |
2706 | } | |
2707 | ||
2708 | gfc_get_ha_sym_tree (name, &symtree); /* Can't fail */ | |
2709 | sym = symtree->n.sym; | |
2710 | ||
3070bab4 JW |
2711 | replace_hidden_procptr_result (&sym, &symtree); |
2712 | ||
6de9cd9a DN |
2713 | e = gfc_get_expr (); |
2714 | e->symtree = symtree; | |
2715 | e->expr_type = EXPR_FUNCTION; | |
2716 | e->value.function.actual = actual_arglist; | |
63645982 | 2717 | e->where = gfc_current_locus; |
6de9cd9a DN |
2718 | |
2719 | if (sym->as != NULL) | |
2720 | e->rank = sym->as->rank; | |
2721 | ||
2722 | if (!sym->attr.function | |
231b2fcc | 2723 | && gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
2724 | { |
2725 | m = MATCH_ERROR; | |
2726 | break; | |
2727 | } | |
2728 | ||
a8b3b0b6 CR |
2729 | /* Check here for the existence of at least one argument for the |
2730 | iso_c_binding functions C_LOC, C_FUNLOC, and C_ASSOCIATED. The | |
2731 | argument(s) given will be checked in gfc_iso_c_func_interface, | |
2732 | during resolution of the function call. */ | |
2733 | if (sym->attr.is_iso_c == 1 | |
2734 | && (sym->from_intmod == INTMOD_ISO_C_BINDING | |
2735 | && (sym->intmod_sym_id == ISOCBINDING_LOC | |
2736 | || sym->intmod_sym_id == ISOCBINDING_FUNLOC | |
2737 | || sym->intmod_sym_id == ISOCBINDING_ASSOCIATED))) | |
2738 | { | |
2739 | /* make sure we were given a param */ | |
2740 | if (actual_arglist == NULL) | |
2741 | { | |
2742 | gfc_error ("Missing argument to '%s' at %C", sym->name); | |
2743 | m = MATCH_ERROR; | |
2744 | break; | |
2745 | } | |
2746 | } | |
2747 | ||
6de9cd9a DN |
2748 | if (sym->result == NULL) |
2749 | sym->result = sym; | |
2750 | ||
2751 | m = MATCH_YES; | |
2752 | break; | |
2753 | ||
2754 | case FL_UNKNOWN: | |
2755 | ||
2756 | /* Special case for derived type variables that get their types | |
edf1eac2 SK |
2757 | via an IMPLICIT statement. This can't wait for the |
2758 | resolution phase. */ | |
6de9cd9a | 2759 | |
8fc541d3 | 2760 | if (gfc_peek_ascii_char () == '%' |
0dd973dd | 2761 | && sym->ts.type == BT_UNKNOWN |
713485cc | 2762 | && gfc_get_default_type (sym->name, sym->ns)->type == BT_DERIVED) |
6de9cd9a DN |
2763 | gfc_set_default_type (sym, 0, sym->ns); |
2764 | ||
2765 | /* If the symbol has a dimension attribute, the expression is a | |
edf1eac2 | 2766 | variable. */ |
6de9cd9a DN |
2767 | |
2768 | if (sym->attr.dimension) | |
2769 | { | |
231b2fcc TS |
2770 | if (gfc_add_flavor (&sym->attr, FL_VARIABLE, |
2771 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
2772 | { |
2773 | m = MATCH_ERROR; | |
2774 | break; | |
2775 | } | |
2776 | ||
2777 | e = gfc_get_expr (); | |
2778 | e->symtree = symtree; | |
2779 | e->expr_type = EXPR_VARIABLE; | |
713485cc | 2780 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
2781 | break; |
2782 | } | |
2783 | ||
2784 | /* Name is not an array, so we peek to see if a '(' implies a | |
edf1eac2 SK |
2785 | function call or a substring reference. Otherwise the |
2786 | variable is just a scalar. */ | |
6de9cd9a DN |
2787 | |
2788 | gfc_gobble_whitespace (); | |
8fc541d3 | 2789 | if (gfc_peek_ascii_char () != '(') |
6de9cd9a DN |
2790 | { |
2791 | /* Assume a scalar variable */ | |
2792 | e = gfc_get_expr (); | |
2793 | e->symtree = symtree; | |
2794 | e->expr_type = EXPR_VARIABLE; | |
2795 | ||
231b2fcc TS |
2796 | if (gfc_add_flavor (&sym->attr, FL_VARIABLE, |
2797 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
2798 | { |
2799 | m = MATCH_ERROR; | |
2800 | break; | |
2801 | } | |
2802 | ||
8e1f752a | 2803 | /*FIXME:??? gfc_match_varspec does set this for us: */ |
6de9cd9a | 2804 | e->ts = sym->ts; |
713485cc | 2805 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
2806 | break; |
2807 | } | |
2808 | ||
d3fcc995 TS |
2809 | /* See if this is a function reference with a keyword argument |
2810 | as first argument. We do this because otherwise a spurious | |
2811 | symbol would end up in the symbol table. */ | |
2812 | ||
2813 | old_loc = gfc_current_locus; | |
2814 | m2 = gfc_match (" ( %n =", argname); | |
2815 | gfc_current_locus = old_loc; | |
6de9cd9a DN |
2816 | |
2817 | e = gfc_get_expr (); | |
2818 | e->symtree = symtree; | |
2819 | ||
d3fcc995 | 2820 | if (m2 != MATCH_YES) |
6de9cd9a | 2821 | { |
5270c302 AL |
2822 | /* Try to figure out whether we're dealing with a character type. |
2823 | We're peeking ahead here, because we don't want to call | |
2824 | match_substring if we're dealing with an implicitly typed | |
2825 | non-character variable. */ | |
2826 | implicit_char = false; | |
2827 | if (sym->ts.type == BT_UNKNOWN) | |
2828 | { | |
713485cc | 2829 | ts = gfc_get_default_type (sym->name, NULL); |
5270c302 AL |
2830 | if (ts->type == BT_CHARACTER) |
2831 | implicit_char = true; | |
2832 | } | |
2833 | ||
d3fcc995 TS |
2834 | /* See if this could possibly be a substring reference of a name |
2835 | that we're not sure is a variable yet. */ | |
6de9cd9a | 2836 | |
5270c302 | 2837 | if ((implicit_char || sym->ts.type == BT_CHARACTER) |
bc21d315 | 2838 | && match_substring (sym->ts.u.cl, 0, &e->ref) == MATCH_YES) |
6de9cd9a | 2839 | { |
6de9cd9a | 2840 | |
d3fcc995 TS |
2841 | e->expr_type = EXPR_VARIABLE; |
2842 | ||
2843 | if (sym->attr.flavor != FL_VARIABLE | |
231b2fcc TS |
2844 | && gfc_add_flavor (&sym->attr, FL_VARIABLE, |
2845 | sym->name, NULL) == FAILURE) | |
d3fcc995 TS |
2846 | { |
2847 | m = MATCH_ERROR; | |
2848 | break; | |
2849 | } | |
2850 | ||
2851 | if (sym->ts.type == BT_UNKNOWN | |
2852 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
2853 | { | |
2854 | m = MATCH_ERROR; | |
2855 | break; | |
2856 | } | |
2857 | ||
2858 | e->ts = sym->ts; | |
860c8f3b | 2859 | if (e->ref) |
bc21d315 | 2860 | e->ts.u.cl = NULL; |
d3fcc995 | 2861 | m = MATCH_YES; |
6de9cd9a DN |
2862 | break; |
2863 | } | |
6de9cd9a DN |
2864 | } |
2865 | ||
2866 | /* Give up, assume we have a function. */ | |
2867 | ||
08a6b8e0 | 2868 | gfc_get_sym_tree (name, NULL, &symtree, false); /* Can't fail */ |
6de9cd9a DN |
2869 | sym = symtree->n.sym; |
2870 | e->expr_type = EXPR_FUNCTION; | |
2871 | ||
2872 | if (!sym->attr.function | |
231b2fcc | 2873 | && gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
2874 | { |
2875 | m = MATCH_ERROR; | |
2876 | break; | |
2877 | } | |
2878 | ||
2879 | sym->result = sym; | |
2880 | ||
2881 | m = gfc_match_actual_arglist (0, &e->value.function.actual); | |
2882 | if (m == MATCH_NO) | |
2883 | gfc_error ("Missing argument list in function '%s' at %C", sym->name); | |
2884 | ||
2885 | if (m != MATCH_YES) | |
2886 | { | |
2887 | m = MATCH_ERROR; | |
2888 | break; | |
2889 | } | |
2890 | ||
2891 | /* If our new function returns a character, array or structure | |
edf1eac2 | 2892 | type, it might have subsequent references. */ |
6de9cd9a | 2893 | |
713485cc | 2894 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
2895 | if (m == MATCH_NO) |
2896 | m = MATCH_YES; | |
2897 | ||
2898 | break; | |
2899 | ||
2900 | generic_function: | |
08a6b8e0 | 2901 | gfc_get_sym_tree (name, NULL, &symtree, false); /* Can't fail */ |
6de9cd9a DN |
2902 | |
2903 | e = gfc_get_expr (); | |
2904 | e->symtree = symtree; | |
2905 | e->expr_type = EXPR_FUNCTION; | |
2906 | ||
2907 | m = gfc_match_actual_arglist (0, &e->value.function.actual); | |
2908 | break; | |
2909 | ||
2910 | default: | |
2911 | gfc_error ("Symbol at %C is not appropriate for an expression"); | |
2912 | return MATCH_ERROR; | |
2913 | } | |
2914 | ||
2915 | if (m == MATCH_YES) | |
2916 | { | |
2917 | e->where = where; | |
2918 | *result = e; | |
2919 | } | |
2920 | else | |
2921 | gfc_free_expr (e); | |
2922 | ||
2923 | return m; | |
2924 | } | |
2925 | ||
2926 | ||
df2fba9e | 2927 | /* Match a variable, i.e. something that can be assigned to. This |
6de9cd9a DN |
2928 | starts as a symbol, can be a structure component or an array |
2929 | reference. It can be a function if the function doesn't have a | |
2930 | separate RESULT variable. If the symbol has not been previously | |
30aabb86 | 2931 | seen, we assume it is a variable. |
6de9cd9a | 2932 | |
30aabb86 PT |
2933 | This function is called by two interface functions: |
2934 | gfc_match_variable, which has host_flag = 1, and | |
2935 | gfc_match_equiv_variable, with host_flag = 0, to restrict the | |
2936 | match of the symbol to the local scope. */ | |
2937 | ||
2938 | static match | |
edf1eac2 | 2939 | match_variable (gfc_expr **result, int equiv_flag, int host_flag) |
6de9cd9a DN |
2940 | { |
2941 | gfc_symbol *sym; | |
2942 | gfc_symtree *st; | |
2943 | gfc_expr *expr; | |
2944 | locus where; | |
2945 | match m; | |
2946 | ||
fd2aa7ad PT |
2947 | /* Since nothing has any business being an lvalue in a module |
2948 | specification block, an interface block or a contains section, | |
2949 | we force the changed_symbols mechanism to work by setting | |
2950 | host_flag to 0. This prevents valid symbols that have the name | |
2951 | of keywords, such as 'end', being turned into variables by | |
df2fba9e | 2952 | failed matching to assignments for, e.g., END INTERFACE. */ |
fd2aa7ad PT |
2953 | if (gfc_current_state () == COMP_MODULE |
2954 | || gfc_current_state () == COMP_INTERFACE | |
2955 | || gfc_current_state () == COMP_CONTAINS) | |
2956 | host_flag = 0; | |
2957 | ||
618f4f46 | 2958 | where = gfc_current_locus; |
30aabb86 | 2959 | m = gfc_match_sym_tree (&st, host_flag); |
6de9cd9a DN |
2960 | if (m != MATCH_YES) |
2961 | return m; | |
6de9cd9a DN |
2962 | |
2963 | sym = st->n.sym; | |
9a3db5a3 PT |
2964 | |
2965 | /* If this is an implicit do loop index and implicitly typed, | |
2966 | it should not be host associated. */ | |
2967 | m = check_for_implicit_index (&st, &sym); | |
2968 | if (m != MATCH_YES) | |
2969 | return m; | |
2970 | ||
2971 | sym->attr.implied_index = 0; | |
2972 | ||
6de9cd9a DN |
2973 | gfc_set_sym_referenced (sym); |
2974 | switch (sym->attr.flavor) | |
2975 | { | |
2976 | case FL_VARIABLE: | |
9aa433c2 | 2977 | if (sym->attr.is_protected && sym->attr.use_assoc) |
edf1eac2 | 2978 | { |
ee7e677f | 2979 | gfc_error ("Assigning to PROTECTED variable at %C"); |
edf1eac2 SK |
2980 | return MATCH_ERROR; |
2981 | } | |
6de9cd9a DN |
2982 | break; |
2983 | ||
2984 | case FL_UNKNOWN: | |
d7e2fcd0 TB |
2985 | { |
2986 | sym_flavor flavor = FL_UNKNOWN; | |
2987 | ||
2988 | gfc_gobble_whitespace (); | |
2989 | ||
2990 | if (sym->attr.external || sym->attr.procedure | |
2991 | || sym->attr.function || sym->attr.subroutine) | |
2992 | flavor = FL_PROCEDURE; | |
b9332b09 PT |
2993 | |
2994 | /* If it is not a procedure, is not typed and is host associated, | |
2995 | we cannot give it a flavor yet. */ | |
2996 | else if (sym->ns == gfc_current_ns->parent | |
2997 | && sym->ts.type == BT_UNKNOWN) | |
2998 | break; | |
2999 | ||
3000 | /* These are definitive indicators that this is a variable. */ | |
8fc541d3 | 3001 | else if (gfc_peek_ascii_char () != '(' || sym->ts.type != BT_UNKNOWN |
d7e2fcd0 TB |
3002 | || sym->attr.pointer || sym->as != NULL) |
3003 | flavor = FL_VARIABLE; | |
3004 | ||
3005 | if (flavor != FL_UNKNOWN | |
3006 | && gfc_add_flavor (&sym->attr, flavor, sym->name, NULL) == FAILURE) | |
3007 | return MATCH_ERROR; | |
3008 | } | |
6de9cd9a DN |
3009 | break; |
3010 | ||
5056a350 SK |
3011 | case FL_PARAMETER: |
3012 | if (equiv_flag) | |
3013 | gfc_error ("Named constant at %C in an EQUIVALENCE"); | |
3014 | else | |
3015 | gfc_error ("Cannot assign to a named constant at %C"); | |
3016 | return MATCH_ERROR; | |
3017 | break; | |
3018 | ||
6de9cd9a | 3019 | case FL_PROCEDURE: |
01d2a7d7 DF |
3020 | /* Check for a nonrecursive function result variable. */ |
3021 | if (sym->attr.function | |
3022 | && !sym->attr.external | |
3023 | && sym->result == sym | |
2d71b918 | 3024 | && (gfc_is_function_return_value (sym, gfc_current_ns) |
01d2a7d7 DF |
3025 | || (sym->attr.entry |
3026 | && sym->ns == gfc_current_ns) | |
3027 | || (sym->attr.entry | |
3028 | && sym->ns == gfc_current_ns->parent))) | |
6de9cd9a | 3029 | { |
6de9cd9a DN |
3030 | /* If a function result is a derived type, then the derived |
3031 | type may still have to be resolved. */ | |
3032 | ||
3033 | if (sym->ts.type == BT_DERIVED | |
bc21d315 | 3034 | && gfc_use_derived (sym->ts.u.derived) == NULL) |
6de9cd9a | 3035 | return MATCH_ERROR; |
6de9cd9a DN |
3036 | break; |
3037 | } | |
3038 | ||
3070bab4 JW |
3039 | if (sym->attr.proc_pointer |
3040 | || replace_hidden_procptr_result (&sym, &st) == SUCCESS) | |
8fb74da4 JW |
3041 | break; |
3042 | ||
6de9cd9a DN |
3043 | /* Fall through to error */ |
3044 | ||
3045 | default: | |
d7e2fcd0 | 3046 | gfc_error ("'%s' at %C is not a variable", sym->name); |
6de9cd9a DN |
3047 | return MATCH_ERROR; |
3048 | } | |
3049 | ||
0dd973dd PB |
3050 | /* Special case for derived type variables that get their types |
3051 | via an IMPLICIT statement. This can't wait for the | |
3052 | resolution phase. */ | |
3053 | ||
3054 | { | |
3055 | gfc_namespace * implicit_ns; | |
3056 | ||
3057 | if (gfc_current_ns->proc_name == sym) | |
3058 | implicit_ns = gfc_current_ns; | |
3059 | else | |
3060 | implicit_ns = sym->ns; | |
3061 | ||
8fc541d3 | 3062 | if (gfc_peek_ascii_char () == '%' |
0dd973dd | 3063 | && sym->ts.type == BT_UNKNOWN |
713485cc | 3064 | && gfc_get_default_type (sym->name, implicit_ns)->type == BT_DERIVED) |
0dd973dd PB |
3065 | gfc_set_default_type (sym, 0, implicit_ns); |
3066 | } | |
3067 | ||
6de9cd9a DN |
3068 | expr = gfc_get_expr (); |
3069 | ||
3070 | expr->expr_type = EXPR_VARIABLE; | |
3071 | expr->symtree = st; | |
3072 | expr->ts = sym->ts; | |
3073 | expr->where = where; | |
3074 | ||
3075 | /* Now see if we have to do more. */ | |
713485cc | 3076 | m = gfc_match_varspec (expr, equiv_flag, false, false); |
6de9cd9a DN |
3077 | if (m != MATCH_YES) |
3078 | { | |
3079 | gfc_free_expr (expr); | |
3080 | return m; | |
3081 | } | |
3082 | ||
3083 | *result = expr; | |
3084 | return MATCH_YES; | |
3085 | } | |
30aabb86 | 3086 | |
edf1eac2 | 3087 | |
30aabb86 | 3088 | match |
edf1eac2 | 3089 | gfc_match_variable (gfc_expr **result, int equiv_flag) |
30aabb86 PT |
3090 | { |
3091 | return match_variable (result, equiv_flag, 1); | |
3092 | } | |
3093 | ||
edf1eac2 | 3094 | |
30aabb86 | 3095 | match |
edf1eac2 | 3096 | gfc_match_equiv_variable (gfc_expr **result) |
30aabb86 PT |
3097 | { |
3098 | return match_variable (result, 1, 0); | |
3099 | } | |
3100 |