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6de9cd9a | 1 | /* Primary expression subroutines |
d1e082c2 | 2 | Copyright (C) 2000-2013 Free Software Foundation, Inc. |
6de9cd9a DN |
3 | Contributed by Andy Vaught |
4 | ||
d1d61a00 | 5 | This file is part of GCC. |
6de9cd9a | 6 | |
d1d61a00 TS |
7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free | |
d234d788 | 9 | Software Foundation; either version 3, or (at your option) any later |
d1d61a00 | 10 | version. |
6de9cd9a | 11 | |
d1d61a00 TS |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
6de9cd9a DN |
16 | |
17 | You should have received a copy of the GNU General Public License | |
d234d788 NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a | 20 | |
6de9cd9a DN |
21 | #include "config.h" |
22 | #include "system.h" | |
953bee7c | 23 | #include "coretypes.h" |
6de9cd9a | 24 | #include "flags.h" |
6de9cd9a DN |
25 | #include "gfortran.h" |
26 | #include "arith.h" | |
27 | #include "match.h" | |
28 | #include "parse.h" | |
b7e75771 | 29 | #include "constructor.h" |
6de9cd9a | 30 | |
837c4b78 JW |
31 | int matching_actual_arglist = 0; |
32 | ||
6de9cd9a DN |
33 | /* Matches a kind-parameter expression, which is either a named |
34 | symbolic constant or a nonnegative integer constant. If | |
bee64a2b JW |
35 | successful, sets the kind value to the correct integer. |
36 | The argument 'is_iso_c' signals whether the kind is an ISO_C_BINDING | |
37 | symbol like e.g. 'c_int'. */ | |
6de9cd9a DN |
38 | |
39 | static match | |
bee64a2b | 40 | match_kind_param (int *kind, int *is_iso_c) |
6de9cd9a DN |
41 | { |
42 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
43 | gfc_symbol *sym; | |
44 | const char *p; | |
45 | match m; | |
46 | ||
bee64a2b JW |
47 | *is_iso_c = 0; |
48 | ||
5cf54585 | 49 | m = gfc_match_small_literal_int (kind, NULL); |
6de9cd9a DN |
50 | if (m != MATCH_NO) |
51 | return m; | |
52 | ||
53 | m = gfc_match_name (name); | |
54 | if (m != MATCH_YES) | |
55 | return m; | |
56 | ||
57 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
58 | return MATCH_ERROR; | |
59 | ||
60 | if (sym == NULL) | |
61 | return MATCH_NO; | |
62 | ||
fbe468a5 JW |
63 | *is_iso_c = sym->attr.is_iso_c; |
64 | ||
6de9cd9a DN |
65 | if (sym->attr.flavor != FL_PARAMETER) |
66 | return MATCH_NO; | |
67 | ||
1d8e1d5d PT |
68 | if (sym->value == NULL) |
69 | return MATCH_NO; | |
70 | ||
6de9cd9a DN |
71 | p = gfc_extract_int (sym->value, kind); |
72 | if (p != NULL) | |
73 | return MATCH_NO; | |
74 | ||
a39fafac FXC |
75 | gfc_set_sym_referenced (sym); |
76 | ||
6de9cd9a DN |
77 | if (*kind < 0) |
78 | return MATCH_NO; | |
79 | ||
80 | return MATCH_YES; | |
81 | } | |
82 | ||
83 | ||
84 | /* Get a trailing kind-specification for non-character variables. | |
85 | Returns: | |
bee64a2b JW |
86 | * the integer kind value or |
87 | * -1 if an error was generated, | |
88 | * -2 if no kind was found. | |
89 | The argument 'is_iso_c' signals whether the kind is an ISO_C_BINDING | |
90 | symbol like e.g. 'c_int'. */ | |
6de9cd9a DN |
91 | |
92 | static int | |
bee64a2b | 93 | get_kind (int *is_iso_c) |
6de9cd9a DN |
94 | { |
95 | int kind; | |
96 | match m; | |
97 | ||
bee64a2b JW |
98 | *is_iso_c = 0; |
99 | ||
6de9cd9a DN |
100 | if (gfc_match_char ('_') != MATCH_YES) |
101 | return -2; | |
102 | ||
bee64a2b | 103 | m = match_kind_param (&kind, is_iso_c); |
6de9cd9a DN |
104 | if (m == MATCH_NO) |
105 | gfc_error ("Missing kind-parameter at %C"); | |
106 | ||
107 | return (m == MATCH_YES) ? kind : -1; | |
108 | } | |
109 | ||
110 | ||
111 | /* Given a character and a radix, see if the character is a valid | |
112 | digit in that radix. */ | |
113 | ||
8fc541d3 FXC |
114 | int |
115 | gfc_check_digit (char c, int radix) | |
6de9cd9a DN |
116 | { |
117 | int r; | |
118 | ||
119 | switch (radix) | |
120 | { | |
121 | case 2: | |
122 | r = ('0' <= c && c <= '1'); | |
123 | break; | |
124 | ||
125 | case 8: | |
126 | r = ('0' <= c && c <= '7'); | |
127 | break; | |
128 | ||
129 | case 10: | |
130 | r = ('0' <= c && c <= '9'); | |
131 | break; | |
132 | ||
133 | case 16: | |
da8309c6 | 134 | r = ISXDIGIT (c); |
6de9cd9a DN |
135 | break; |
136 | ||
137 | default: | |
8fc541d3 | 138 | gfc_internal_error ("gfc_check_digit(): bad radix"); |
6de9cd9a DN |
139 | } |
140 | ||
141 | return r; | |
142 | } | |
143 | ||
144 | ||
145 | /* Match the digit string part of an integer if signflag is not set, | |
146 | the signed digit string part if signflag is set. If the buffer | |
147 | is NULL, we just count characters for the resolution pass. Returns | |
148 | the number of characters matched, -1 for no match. */ | |
149 | ||
150 | static int | |
151 | match_digits (int signflag, int radix, char *buffer) | |
152 | { | |
153 | locus old_loc; | |
8fc541d3 FXC |
154 | int length; |
155 | char c; | |
6de9cd9a DN |
156 | |
157 | length = 0; | |
8fc541d3 | 158 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
159 | |
160 | if (signflag && (c == '+' || c == '-')) | |
161 | { | |
162 | if (buffer != NULL) | |
163 | *buffer++ = c; | |
69029c61 | 164 | gfc_gobble_whitespace (); |
8fc541d3 | 165 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
166 | length++; |
167 | } | |
168 | ||
8fc541d3 | 169 | if (!gfc_check_digit (c, radix)) |
6de9cd9a DN |
170 | return -1; |
171 | ||
172 | length++; | |
173 | if (buffer != NULL) | |
174 | *buffer++ = c; | |
175 | ||
176 | for (;;) | |
177 | { | |
63645982 | 178 | old_loc = gfc_current_locus; |
8fc541d3 | 179 | c = gfc_next_ascii_char (); |
6de9cd9a | 180 | |
8fc541d3 | 181 | if (!gfc_check_digit (c, radix)) |
6de9cd9a DN |
182 | break; |
183 | ||
184 | if (buffer != NULL) | |
185 | *buffer++ = c; | |
186 | length++; | |
187 | } | |
188 | ||
63645982 | 189 | gfc_current_locus = old_loc; |
6de9cd9a DN |
190 | |
191 | return length; | |
192 | } | |
193 | ||
194 | ||
195 | /* Match an integer (digit string and optional kind). | |
196 | A sign will be accepted if signflag is set. */ | |
197 | ||
198 | static match | |
edf1eac2 | 199 | match_integer_constant (gfc_expr **result, int signflag) |
6de9cd9a | 200 | { |
bee64a2b | 201 | int length, kind, is_iso_c; |
6de9cd9a DN |
202 | locus old_loc; |
203 | char *buffer; | |
204 | gfc_expr *e; | |
205 | ||
63645982 | 206 | old_loc = gfc_current_locus; |
6de9cd9a DN |
207 | gfc_gobble_whitespace (); |
208 | ||
209 | length = match_digits (signflag, 10, NULL); | |
63645982 | 210 | gfc_current_locus = old_loc; |
6de9cd9a DN |
211 | if (length == -1) |
212 | return MATCH_NO; | |
213 | ||
ece3f663 | 214 | buffer = (char *) alloca (length + 1); |
6de9cd9a DN |
215 | memset (buffer, '\0', length + 1); |
216 | ||
217 | gfc_gobble_whitespace (); | |
218 | ||
219 | match_digits (signflag, 10, buffer); | |
220 | ||
bee64a2b | 221 | kind = get_kind (&is_iso_c); |
6de9cd9a | 222 | if (kind == -2) |
9d64df18 | 223 | kind = gfc_default_integer_kind; |
6de9cd9a DN |
224 | if (kind == -1) |
225 | return MATCH_ERROR; | |
226 | ||
f4347334 ZG |
227 | if (kind == 4 && gfc_option.flag_integer4_kind == 8) |
228 | kind = 8; | |
229 | ||
e7a2d5fb | 230 | if (gfc_validate_kind (BT_INTEGER, kind, true) < 0) |
6de9cd9a DN |
231 | { |
232 | gfc_error ("Integer kind %d at %C not available", kind); | |
233 | return MATCH_ERROR; | |
234 | } | |
235 | ||
63645982 | 236 | e = gfc_convert_integer (buffer, kind, 10, &gfc_current_locus); |
bee64a2b | 237 | e->ts.is_c_interop = is_iso_c; |
6de9cd9a DN |
238 | |
239 | if (gfc_range_check (e) != ARITH_OK) | |
240 | { | |
b2458f91 TB |
241 | gfc_error ("Integer too big for its kind at %C. This check can be " |
242 | "disabled with the option -fno-range-check"); | |
6de9cd9a DN |
243 | |
244 | gfc_free_expr (e); | |
245 | return MATCH_ERROR; | |
246 | } | |
247 | ||
248 | *result = e; | |
249 | return MATCH_YES; | |
250 | } | |
251 | ||
252 | ||
d3642f89 FW |
253 | /* Match a Hollerith constant. */ |
254 | ||
255 | static match | |
edf1eac2 | 256 | match_hollerith_constant (gfc_expr **result) |
d3642f89 FW |
257 | { |
258 | locus old_loc; | |
edf1eac2 SK |
259 | gfc_expr *e = NULL; |
260 | const char *msg; | |
401fcd3b | 261 | int num, pad; |
24bce1fd | 262 | int i; |
d3642f89 FW |
263 | |
264 | old_loc = gfc_current_locus; | |
265 | gfc_gobble_whitespace (); | |
266 | ||
267 | if (match_integer_constant (&e, 0) == MATCH_YES | |
edf1eac2 | 268 | && gfc_match_char ('h') == MATCH_YES) |
d3642f89 | 269 | { |
9717f7a1 | 270 | if (gfc_notify_std (GFC_STD_LEGACY, "Hollerith constant " |
edf1eac2 | 271 | "at %C") == FAILURE) |
d3642f89 FW |
272 | goto cleanup; |
273 | ||
274 | msg = gfc_extract_int (e, &num); | |
275 | if (msg != NULL) | |
276 | { | |
277 | gfc_error (msg); | |
278 | goto cleanup; | |
279 | } | |
280 | if (num == 0) | |
281 | { | |
edf1eac2 SK |
282 | gfc_error ("Invalid Hollerith constant: %L must contain at least " |
283 | "one character", &old_loc); | |
d3642f89 FW |
284 | goto cleanup; |
285 | } | |
286 | if (e->ts.kind != gfc_default_integer_kind) | |
287 | { | |
eb6d74fa | 288 | gfc_error ("Invalid Hollerith constant: Integer kind at %L " |
edf1eac2 | 289 | "should be default", &old_loc); |
d3642f89 FW |
290 | goto cleanup; |
291 | } | |
292 | else | |
293 | { | |
d3642f89 | 294 | gfc_free_expr (e); |
b7e75771 JD |
295 | e = gfc_get_constant_expr (BT_HOLLERITH, gfc_default_character_kind, |
296 | &gfc_current_locus); | |
20585ad6 | 297 | |
401fcd3b JD |
298 | /* Calculate padding needed to fit default integer memory. */ |
299 | pad = gfc_default_integer_kind - (num % gfc_default_integer_kind); | |
300 | ||
301 | e->representation.string = XCNEWVEC (char, num + pad + 1); | |
8fc541d3 | 302 | |
20585ad6 | 303 | for (i = 0; i < num; i++) |
00660189 | 304 | { |
696abb30 | 305 | gfc_char_t c = gfc_next_char_literal (INSTRING_WARN); |
00660189 FXC |
306 | if (! gfc_wide_fits_in_byte (c)) |
307 | { | |
308 | gfc_error ("Invalid Hollerith constant at %L contains a " | |
309 | "wide character", &old_loc); | |
310 | goto cleanup; | |
311 | } | |
312 | ||
313 | e->representation.string[i] = (unsigned char) c; | |
314 | } | |
8fc541d3 | 315 | |
401fcd3b JD |
316 | /* Now pad with blanks and end with a null char. */ |
317 | for (i = 0; i < pad; i++) | |
318 | e->representation.string[num + i] = ' '; | |
319 | ||
320 | e->representation.string[num + i] = '\0'; | |
321 | e->representation.length = num + pad; | |
322 | e->ts.u.pad = pad; | |
20585ad6 | 323 | |
d3642f89 FW |
324 | *result = e; |
325 | return MATCH_YES; | |
326 | } | |
327 | } | |
328 | ||
329 | gfc_free_expr (e); | |
330 | gfc_current_locus = old_loc; | |
331 | return MATCH_NO; | |
332 | ||
333 | cleanup: | |
334 | gfc_free_expr (e); | |
335 | return MATCH_ERROR; | |
336 | } | |
337 | ||
338 | ||
6de9cd9a | 339 | /* Match a binary, octal or hexadecimal constant that can be found in |
78019d16 SK |
340 | a DATA statement. The standard permits b'010...', o'73...', and |
341 | z'a1...' where b, o, and z can be capital letters. This function | |
342 | also accepts postfixed forms of the constants: '01...'b, '73...'o, | |
343 | and 'a1...'z. An additional extension is the use of x for z. */ | |
6de9cd9a DN |
344 | |
345 | static match | |
edf1eac2 | 346 | match_boz_constant (gfc_expr **result) |
6de9cd9a | 347 | { |
8fc541d3 | 348 | int radix, length, x_hex, kind; |
78019d16 | 349 | locus old_loc, start_loc; |
8fc541d3 | 350 | char *buffer, post, delim; |
6de9cd9a | 351 | gfc_expr *e; |
6de9cd9a | 352 | |
78019d16 | 353 | start_loc = old_loc = gfc_current_locus; |
6de9cd9a DN |
354 | gfc_gobble_whitespace (); |
355 | ||
88199e7c | 356 | x_hex = 0; |
8fc541d3 | 357 | switch (post = gfc_next_ascii_char ()) |
6de9cd9a DN |
358 | { |
359 | case 'b': | |
360 | radix = 2; | |
78019d16 | 361 | post = 0; |
6de9cd9a DN |
362 | break; |
363 | case 'o': | |
364 | radix = 8; | |
78019d16 | 365 | post = 0; |
6de9cd9a DN |
366 | break; |
367 | case 'x': | |
88199e7c | 368 | x_hex = 1; |
6de9cd9a DN |
369 | /* Fall through. */ |
370 | case 'z': | |
371 | radix = 16; | |
78019d16 SK |
372 | post = 0; |
373 | break; | |
374 | case '\'': | |
375 | /* Fall through. */ | |
376 | case '\"': | |
377 | delim = post; | |
378 | post = 1; | |
379 | radix = 16; /* Set to accept any valid digit string. */ | |
6de9cd9a DN |
380 | break; |
381 | default: | |
382 | goto backup; | |
383 | } | |
384 | ||
385 | /* No whitespace allowed here. */ | |
386 | ||
78019d16 | 387 | if (post == 0) |
8fc541d3 | 388 | delim = gfc_next_ascii_char (); |
78019d16 | 389 | |
6de9cd9a DN |
390 | if (delim != '\'' && delim != '\"') |
391 | goto backup; | |
392 | ||
00a4618b | 393 | if (x_hex |
9717f7a1 | 394 | && (gfc_notify_std (GFC_STD_GNU, "Hexadecimal " |
0bf0efd5 | 395 | "constant at %C uses non-standard syntax") |
5d874166 TS |
396 | == FAILURE)) |
397 | return MATCH_ERROR; | |
398 | ||
63645982 | 399 | old_loc = gfc_current_locus; |
6de9cd9a DN |
400 | |
401 | length = match_digits (0, radix, NULL); | |
402 | if (length == -1) | |
403 | { | |
78019d16 | 404 | gfc_error ("Empty set of digits in BOZ constant at %C"); |
6de9cd9a DN |
405 | return MATCH_ERROR; |
406 | } | |
407 | ||
8fc541d3 | 408 | if (gfc_next_ascii_char () != delim) |
6de9cd9a | 409 | { |
78019d16 SK |
410 | gfc_error ("Illegal character in BOZ constant at %C"); |
411 | return MATCH_ERROR; | |
412 | } | |
413 | ||
414 | if (post == 1) | |
415 | { | |
8fc541d3 | 416 | switch (gfc_next_ascii_char ()) |
78019d16 SK |
417 | { |
418 | case 'b': | |
419 | radix = 2; | |
21dac32c | 420 | break; |
78019d16 SK |
421 | case 'o': |
422 | radix = 8; | |
21dac32c | 423 | break; |
78019d16 SK |
424 | case 'x': |
425 | /* Fall through. */ | |
426 | case 'z': | |
427 | radix = 16; | |
21dac32c | 428 | break; |
31043f6c | 429 | default: |
78019d16 | 430 | goto backup; |
31043f6c | 431 | } |
0bf0efd5 | 432 | |
9717f7a1 | 433 | if (gfc_notify_std (GFC_STD_GNU, "BOZ constant " |
0bf0efd5 TB |
434 | "at %C uses non-standard postfix syntax") |
435 | == FAILURE) | |
436 | return MATCH_ERROR; | |
6de9cd9a DN |
437 | } |
438 | ||
63645982 | 439 | gfc_current_locus = old_loc; |
6de9cd9a | 440 | |
ece3f663 | 441 | buffer = (char *) alloca (length + 1); |
6de9cd9a DN |
442 | memset (buffer, '\0', length + 1); |
443 | ||
444 | match_digits (0, radix, buffer); | |
8fc541d3 | 445 | gfc_next_ascii_char (); /* Eat delimiter. */ |
78019d16 | 446 | if (post == 1) |
8fc541d3 | 447 | gfc_next_ascii_char (); /* Eat postfixed b, o, z, or x. */ |
6de9cd9a | 448 | |
f4e7375a SK |
449 | /* In section 5.2.5 and following C567 in the Fortran 2003 standard, we find |
450 | "If a data-stmt-constant is a boz-literal-constant, the corresponding | |
451 | variable shall be of type integer. The boz-literal-constant is treated | |
452 | as if it were an int-literal-constant with a kind-param that specifies | |
453 | the representation method with the largest decimal exponent range | |
454 | supported by the processor." */ | |
455 | ||
456 | kind = gfc_max_integer_kind; | |
5d874166 | 457 | e = gfc_convert_integer (buffer, kind, radix, &gfc_current_locus); |
6de9cd9a | 458 | |
00a4618b TB |
459 | /* Mark as boz variable. */ |
460 | e->is_boz = 1; | |
461 | ||
6de9cd9a DN |
462 | if (gfc_range_check (e) != ARITH_OK) |
463 | { | |
5d874166 | 464 | gfc_error ("Integer too big for integer kind %i at %C", kind); |
88199e7c TS |
465 | gfc_free_expr (e); |
466 | return MATCH_ERROR; | |
467 | } | |
468 | ||
0bf0efd5 | 469 | if (!gfc_in_match_data () |
9717f7a1 | 470 | && (gfc_notify_std (GFC_STD_F2003, "BOZ used outside a DATA " |
0bf0efd5 TB |
471 | "statement at %C") |
472 | == FAILURE)) | |
473 | return MATCH_ERROR; | |
474 | ||
6de9cd9a DN |
475 | *result = e; |
476 | return MATCH_YES; | |
477 | ||
478 | backup: | |
78019d16 | 479 | gfc_current_locus = start_loc; |
6de9cd9a DN |
480 | return MATCH_NO; |
481 | } | |
482 | ||
483 | ||
69029c61 | 484 | /* Match a real constant of some sort. Allow a signed constant if signflag |
00a4618b | 485 | is nonzero. */ |
6de9cd9a DN |
486 | |
487 | static match | |
edf1eac2 | 488 | match_real_constant (gfc_expr **result, int signflag) |
6de9cd9a | 489 | { |
bee64a2b | 490 | int kind, count, seen_dp, seen_digits, is_iso_c; |
6de9cd9a | 491 | locus old_loc, temp_loc; |
8fc541d3 | 492 | char *p, *buffer, c, exp_char; |
6de9cd9a | 493 | gfc_expr *e; |
69029c61 | 494 | bool negate; |
6de9cd9a | 495 | |
63645982 | 496 | old_loc = gfc_current_locus; |
6de9cd9a DN |
497 | gfc_gobble_whitespace (); |
498 | ||
499 | e = NULL; | |
500 | ||
501 | count = 0; | |
502 | seen_dp = 0; | |
503 | seen_digits = 0; | |
504 | exp_char = ' '; | |
69029c61 | 505 | negate = FALSE; |
6de9cd9a | 506 | |
8fc541d3 | 507 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
508 | if (signflag && (c == '+' || c == '-')) |
509 | { | |
69029c61 PB |
510 | if (c == '-') |
511 | negate = TRUE; | |
512 | ||
513 | gfc_gobble_whitespace (); | |
8fc541d3 | 514 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
515 | } |
516 | ||
02712c16 | 517 | /* Scan significand. */ |
8fc541d3 | 518 | for (;; c = gfc_next_ascii_char (), count++) |
6de9cd9a DN |
519 | { |
520 | if (c == '.') | |
521 | { | |
522 | if (seen_dp) | |
523 | goto done; | |
524 | ||
edf1eac2 SK |
525 | /* Check to see if "." goes with a following operator like |
526 | ".eq.". */ | |
63645982 | 527 | temp_loc = gfc_current_locus; |
8fc541d3 | 528 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
529 | |
530 | if (c == 'e' || c == 'd' || c == 'q') | |
531 | { | |
8fc541d3 | 532 | c = gfc_next_ascii_char (); |
6de9cd9a | 533 | if (c == '.') |
f7b529fa | 534 | goto done; /* Operator named .e. or .d. */ |
6de9cd9a DN |
535 | } |
536 | ||
537 | if (ISALPHA (c)) | |
538 | goto done; /* Distinguish 1.e9 from 1.eq.2 */ | |
539 | ||
63645982 | 540 | gfc_current_locus = temp_loc; |
6de9cd9a DN |
541 | seen_dp = 1; |
542 | continue; | |
543 | } | |
544 | ||
545 | if (ISDIGIT (c)) | |
546 | { | |
547 | seen_digits = 1; | |
548 | continue; | |
549 | } | |
550 | ||
551 | break; | |
552 | } | |
553 | ||
edf1eac2 | 554 | if (!seen_digits || (c != 'e' && c != 'd' && c != 'q')) |
6de9cd9a DN |
555 | goto done; |
556 | exp_char = c; | |
557 | ||
5a17346a SK |
558 | |
559 | if (c == 'q') | |
560 | { | |
9717f7a1 | 561 | if (gfc_notify_std (GFC_STD_GNU, "exponent-letter 'q' in " |
5a17346a SK |
562 | "real-literal-constant at %C") == FAILURE) |
563 | return MATCH_ERROR; | |
564 | else if (gfc_option.warn_real_q_constant) | |
565 | gfc_warning("Extension: exponent-letter 'q' in real-literal-constant " | |
566 | "at %C"); | |
567 | } | |
568 | ||
6de9cd9a | 569 | /* Scan exponent. */ |
8fc541d3 | 570 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
571 | count++; |
572 | ||
573 | if (c == '+' || c == '-') | |
574 | { /* optional sign */ | |
8fc541d3 | 575 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
576 | count++; |
577 | } | |
578 | ||
579 | if (!ISDIGIT (c)) | |
580 | { | |
6de9cd9a DN |
581 | gfc_error ("Missing exponent in real number at %C"); |
582 | return MATCH_ERROR; | |
583 | } | |
584 | ||
585 | while (ISDIGIT (c)) | |
586 | { | |
8fc541d3 | 587 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
588 | count++; |
589 | } | |
590 | ||
591 | done: | |
69029c61 | 592 | /* Check that we have a numeric constant. */ |
6de9cd9a DN |
593 | if (!seen_digits || (!seen_dp && exp_char == ' ')) |
594 | { | |
63645982 | 595 | gfc_current_locus = old_loc; |
6de9cd9a DN |
596 | return MATCH_NO; |
597 | } | |
598 | ||
599 | /* Convert the number. */ | |
63645982 | 600 | gfc_current_locus = old_loc; |
6de9cd9a DN |
601 | gfc_gobble_whitespace (); |
602 | ||
ece3f663 | 603 | buffer = (char *) alloca (count + 1); |
6de9cd9a DN |
604 | memset (buffer, '\0', count + 1); |
605 | ||
6de9cd9a | 606 | p = buffer; |
8fc541d3 | 607 | c = gfc_next_ascii_char (); |
69029c61 | 608 | if (c == '+' || c == '-') |
6de9cd9a | 609 | { |
69029c61 | 610 | gfc_gobble_whitespace (); |
8fc541d3 | 611 | c = gfc_next_ascii_char (); |
69029c61 PB |
612 | } |
613 | ||
614 | /* Hack for mpfr_set_str(). */ | |
615 | for (;;) | |
616 | { | |
617 | if (c == 'd' || c == 'q') | |
6de9cd9a | 618 | *p = 'e'; |
69029c61 PB |
619 | else |
620 | *p = c; | |
6de9cd9a | 621 | p++; |
69029c61 PB |
622 | if (--count == 0) |
623 | break; | |
624 | ||
8fc541d3 | 625 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
626 | } |
627 | ||
bee64a2b | 628 | kind = get_kind (&is_iso_c); |
6de9cd9a DN |
629 | if (kind == -1) |
630 | goto cleanup; | |
631 | ||
632 | switch (exp_char) | |
633 | { | |
634 | case 'd': | |
635 | if (kind != -2) | |
636 | { | |
edf1eac2 SK |
637 | gfc_error ("Real number at %C has a 'd' exponent and an explicit " |
638 | "kind"); | |
6de9cd9a DN |
639 | goto cleanup; |
640 | } | |
9d64df18 | 641 | kind = gfc_default_double_kind; |
f4347334 ZG |
642 | |
643 | if (kind == 4) | |
644 | { | |
645 | if (gfc_option.flag_real4_kind == 8) | |
646 | kind = 8; | |
647 | if (gfc_option.flag_real4_kind == 10) | |
648 | kind = 10; | |
649 | if (gfc_option.flag_real4_kind == 16) | |
650 | kind = 16; | |
651 | } | |
652 | ||
653 | if (kind == 8) | |
654 | { | |
655 | if (gfc_option.flag_real8_kind == 4) | |
656 | kind = 4; | |
657 | if (gfc_option.flag_real8_kind == 10) | |
658 | kind = 10; | |
659 | if (gfc_option.flag_real8_kind == 16) | |
660 | kind = 16; | |
661 | } | |
6de9cd9a DN |
662 | break; |
663 | ||
5a17346a SK |
664 | case 'q': |
665 | if (kind != -2) | |
666 | { | |
667 | gfc_error ("Real number at %C has a 'q' exponent and an explicit " | |
668 | "kind"); | |
669 | goto cleanup; | |
670 | } | |
671 | ||
672 | /* The maximum possible real kind type parameter is 16. First, try | |
673 | that for the kind, then fallback to trying kind=10 (Intel 80 bit) | |
674 | extended precision. If neither value works, just given up. */ | |
675 | kind = 16; | |
676 | if (gfc_validate_kind (BT_REAL, kind, true) < 0) | |
677 | { | |
678 | kind = 10; | |
679 | if (gfc_validate_kind (BT_REAL, kind, true) < 0) | |
680 | { | |
681 | gfc_error ("Invalid exponent-letter 'q' in " | |
682 | "real-literal-constant at %C"); | |
683 | goto cleanup; | |
684 | } | |
685 | } | |
686 | break; | |
687 | ||
6de9cd9a DN |
688 | default: |
689 | if (kind == -2) | |
9d64df18 | 690 | kind = gfc_default_real_kind; |
6de9cd9a | 691 | |
f4347334 ZG |
692 | if (kind == 4) |
693 | { | |
694 | if (gfc_option.flag_real4_kind == 8) | |
695 | kind = 8; | |
696 | if (gfc_option.flag_real4_kind == 10) | |
697 | kind = 10; | |
698 | if (gfc_option.flag_real4_kind == 16) | |
699 | kind = 16; | |
700 | } | |
701 | ||
702 | if (kind == 8) | |
703 | { | |
704 | if (gfc_option.flag_real8_kind == 4) | |
705 | kind = 4; | |
706 | if (gfc_option.flag_real8_kind == 10) | |
707 | kind = 10; | |
708 | if (gfc_option.flag_real8_kind == 16) | |
709 | kind = 16; | |
710 | } | |
711 | ||
e7a2d5fb | 712 | if (gfc_validate_kind (BT_REAL, kind, true) < 0) |
6de9cd9a DN |
713 | { |
714 | gfc_error ("Invalid real kind %d at %C", kind); | |
715 | goto cleanup; | |
716 | } | |
717 | } | |
718 | ||
63645982 | 719 | e = gfc_convert_real (buffer, kind, &gfc_current_locus); |
69029c61 PB |
720 | if (negate) |
721 | mpfr_neg (e->value.real, e->value.real, GFC_RND_MODE); | |
bee64a2b | 722 | e->ts.is_c_interop = is_iso_c; |
6de9cd9a DN |
723 | |
724 | switch (gfc_range_check (e)) | |
725 | { | |
726 | case ARITH_OK: | |
727 | break; | |
728 | case ARITH_OVERFLOW: | |
729 | gfc_error ("Real constant overflows its kind at %C"); | |
730 | goto cleanup; | |
731 | ||
732 | case ARITH_UNDERFLOW: | |
2d8b59df | 733 | if (gfc_option.warn_underflow) |
edf1eac2 | 734 | gfc_warning ("Real constant underflows its kind at %C"); |
f8e566e5 | 735 | mpfr_set_ui (e->value.real, 0, GFC_RND_MODE); |
2d8b59df | 736 | break; |
6de9cd9a DN |
737 | |
738 | default: | |
739 | gfc_internal_error ("gfc_range_check() returned bad value"); | |
740 | } | |
741 | ||
742 | *result = e; | |
743 | return MATCH_YES; | |
744 | ||
745 | cleanup: | |
746 | gfc_free_expr (e); | |
747 | return MATCH_ERROR; | |
748 | } | |
749 | ||
750 | ||
751 | /* Match a substring reference. */ | |
752 | ||
753 | static match | |
edf1eac2 | 754 | match_substring (gfc_charlen *cl, int init, gfc_ref **result) |
6de9cd9a DN |
755 | { |
756 | gfc_expr *start, *end; | |
757 | locus old_loc; | |
758 | gfc_ref *ref; | |
759 | match m; | |
760 | ||
761 | start = NULL; | |
762 | end = NULL; | |
763 | ||
63645982 | 764 | old_loc = gfc_current_locus; |
6de9cd9a DN |
765 | |
766 | m = gfc_match_char ('('); | |
767 | if (m != MATCH_YES) | |
768 | return MATCH_NO; | |
769 | ||
770 | if (gfc_match_char (':') != MATCH_YES) | |
771 | { | |
772 | if (init) | |
773 | m = gfc_match_init_expr (&start); | |
774 | else | |
775 | m = gfc_match_expr (&start); | |
776 | ||
777 | if (m != MATCH_YES) | |
778 | { | |
779 | m = MATCH_NO; | |
780 | goto cleanup; | |
781 | } | |
782 | ||
783 | m = gfc_match_char (':'); | |
784 | if (m != MATCH_YES) | |
785 | goto cleanup; | |
786 | } | |
787 | ||
788 | if (gfc_match_char (')') != MATCH_YES) | |
789 | { | |
790 | if (init) | |
791 | m = gfc_match_init_expr (&end); | |
792 | else | |
793 | m = gfc_match_expr (&end); | |
794 | ||
795 | if (m == MATCH_NO) | |
796 | goto syntax; | |
797 | if (m == MATCH_ERROR) | |
798 | goto cleanup; | |
799 | ||
800 | m = gfc_match_char (')'); | |
801 | if (m == MATCH_NO) | |
802 | goto syntax; | |
803 | } | |
804 | ||
805 | /* Optimize away the (:) reference. */ | |
806 | if (start == NULL && end == NULL) | |
807 | ref = NULL; | |
808 | else | |
809 | { | |
810 | ref = gfc_get_ref (); | |
811 | ||
812 | ref->type = REF_SUBSTRING; | |
813 | if (start == NULL) | |
b7e75771 | 814 | start = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1); |
6de9cd9a DN |
815 | ref->u.ss.start = start; |
816 | if (end == NULL && cl) | |
817 | end = gfc_copy_expr (cl->length); | |
818 | ref->u.ss.end = end; | |
819 | ref->u.ss.length = cl; | |
820 | } | |
821 | ||
822 | *result = ref; | |
823 | return MATCH_YES; | |
824 | ||
825 | syntax: | |
826 | gfc_error ("Syntax error in SUBSTRING specification at %C"); | |
827 | m = MATCH_ERROR; | |
828 | ||
829 | cleanup: | |
830 | gfc_free_expr (start); | |
831 | gfc_free_expr (end); | |
832 | ||
63645982 | 833 | gfc_current_locus = old_loc; |
6de9cd9a DN |
834 | return m; |
835 | } | |
836 | ||
837 | ||
838 | /* Reads the next character of a string constant, taking care to | |
839 | return doubled delimiters on the input as a single instance of | |
840 | the delimiter. | |
841 | ||
8fc541d3 | 842 | Special return values for "ret" argument are: |
6de9cd9a DN |
843 | -1 End of the string, as determined by the delimiter |
844 | -2 Unterminated string detected | |
845 | ||
846 | Backslash codes are also expanded at this time. */ | |
847 | ||
8fc541d3 FXC |
848 | static gfc_char_t |
849 | next_string_char (gfc_char_t delimiter, int *ret) | |
6de9cd9a DN |
850 | { |
851 | locus old_locus; | |
8fc541d3 | 852 | gfc_char_t c; |
6de9cd9a | 853 | |
696abb30 | 854 | c = gfc_next_char_literal (INSTRING_WARN); |
8fc541d3 | 855 | *ret = 0; |
6de9cd9a DN |
856 | |
857 | if (c == '\n') | |
8fc541d3 FXC |
858 | { |
859 | *ret = -2; | |
860 | return 0; | |
861 | } | |
6de9cd9a | 862 | |
131c66cd | 863 | if (gfc_option.flag_backslash && c == '\\') |
6de9cd9a | 864 | { |
63645982 | 865 | old_locus = gfc_current_locus; |
6de9cd9a | 866 | |
a88a266c SK |
867 | if (gfc_match_special_char (&c) == MATCH_NO) |
868 | gfc_current_locus = old_locus; | |
2e6a83a7 SK |
869 | |
870 | if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings) | |
871 | gfc_warning ("Extension: backslash character at %C"); | |
6de9cd9a DN |
872 | } |
873 | ||
874 | if (c != delimiter) | |
875 | return c; | |
876 | ||
63645982 | 877 | old_locus = gfc_current_locus; |
696abb30 | 878 | c = gfc_next_char_literal (NONSTRING); |
6de9cd9a DN |
879 | |
880 | if (c == delimiter) | |
881 | return c; | |
63645982 | 882 | gfc_current_locus = old_locus; |
6de9cd9a | 883 | |
8fc541d3 FXC |
884 | *ret = -1; |
885 | return 0; | |
6de9cd9a DN |
886 | } |
887 | ||
888 | ||
889 | /* Special case of gfc_match_name() that matches a parameter kind name | |
890 | before a string constant. This takes case of the weird but legal | |
4f8ea09e | 891 | case of: |
6de9cd9a DN |
892 | |
893 | kind_____'string' | |
894 | ||
895 | where kind____ is a parameter. gfc_match_name() will happily slurp | |
896 | up all the underscores, which leads to problems. If we return | |
897 | MATCH_YES, the parse pointer points to the final underscore, which | |
898 | is not part of the name. We never return MATCH_ERROR-- errors in | |
899 | the name will be detected later. */ | |
900 | ||
901 | static match | |
902 | match_charkind_name (char *name) | |
903 | { | |
904 | locus old_loc; | |
905 | char c, peek; | |
906 | int len; | |
907 | ||
908 | gfc_gobble_whitespace (); | |
8fc541d3 | 909 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
910 | if (!ISALPHA (c)) |
911 | return MATCH_NO; | |
912 | ||
913 | *name++ = c; | |
914 | len = 1; | |
915 | ||
916 | for (;;) | |
917 | { | |
63645982 | 918 | old_loc = gfc_current_locus; |
8fc541d3 | 919 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
920 | |
921 | if (c == '_') | |
922 | { | |
8fc541d3 | 923 | peek = gfc_peek_ascii_char (); |
6de9cd9a DN |
924 | |
925 | if (peek == '\'' || peek == '\"') | |
926 | { | |
63645982 | 927 | gfc_current_locus = old_loc; |
6de9cd9a DN |
928 | *name = '\0'; |
929 | return MATCH_YES; | |
930 | } | |
931 | } | |
932 | ||
933 | if (!ISALNUM (c) | |
934 | && c != '_' | |
ffa61a5e | 935 | && (c != '$' || !gfc_option.flag_dollar_ok)) |
6de9cd9a DN |
936 | break; |
937 | ||
938 | *name++ = c; | |
939 | if (++len > GFC_MAX_SYMBOL_LEN) | |
940 | break; | |
941 | } | |
942 | ||
943 | return MATCH_NO; | |
944 | } | |
945 | ||
946 | ||
947 | /* See if the current input matches a character constant. Lots of | |
948 | contortions have to be done to match the kind parameter which comes | |
949 | before the actual string. The main consideration is that we don't | |
950 | want to error out too quickly. For example, we don't actually do | |
951 | any validation of the kinds until we have actually seen a legal | |
952 | delimiter. Using match_kind_param() generates errors too quickly. */ | |
953 | ||
954 | static match | |
edf1eac2 | 955 | match_string_constant (gfc_expr **result) |
6de9cd9a | 956 | { |
00660189 | 957 | char name[GFC_MAX_SYMBOL_LEN + 1], peek; |
8fc541d3 | 958 | int i, kind, length, warn_ampersand, ret; |
6de9cd9a DN |
959 | locus old_locus, start_locus; |
960 | gfc_symbol *sym; | |
961 | gfc_expr *e; | |
962 | const char *q; | |
963 | match m; | |
00660189 | 964 | gfc_char_t c, delimiter, *p; |
6de9cd9a | 965 | |
63645982 | 966 | old_locus = gfc_current_locus; |
6de9cd9a DN |
967 | |
968 | gfc_gobble_whitespace (); | |
969 | ||
6de9cd9a DN |
970 | c = gfc_next_char (); |
971 | if (c == '\'' || c == '"') | |
972 | { | |
9d64df18 | 973 | kind = gfc_default_character_kind; |
66faed76 | 974 | start_locus = gfc_current_locus; |
6de9cd9a DN |
975 | goto got_delim; |
976 | } | |
977 | ||
8fc541d3 | 978 | if (gfc_wide_is_digit (c)) |
6de9cd9a DN |
979 | { |
980 | kind = 0; | |
981 | ||
8fc541d3 | 982 | while (gfc_wide_is_digit (c)) |
6de9cd9a DN |
983 | { |
984 | kind = kind * 10 + c - '0'; | |
985 | if (kind > 9999999) | |
986 | goto no_match; | |
987 | c = gfc_next_char (); | |
988 | } | |
989 | ||
990 | } | |
991 | else | |
992 | { | |
63645982 | 993 | gfc_current_locus = old_locus; |
6de9cd9a DN |
994 | |
995 | m = match_charkind_name (name); | |
996 | if (m != MATCH_YES) | |
997 | goto no_match; | |
998 | ||
999 | if (gfc_find_symbol (name, NULL, 1, &sym) | |
1000 | || sym == NULL | |
1001 | || sym->attr.flavor != FL_PARAMETER) | |
1002 | goto no_match; | |
1003 | ||
1004 | kind = -1; | |
1005 | c = gfc_next_char (); | |
1006 | } | |
1007 | ||
1008 | if (c == ' ') | |
1009 | { | |
1010 | gfc_gobble_whitespace (); | |
1011 | c = gfc_next_char (); | |
1012 | } | |
1013 | ||
1014 | if (c != '_') | |
1015 | goto no_match; | |
1016 | ||
1017 | gfc_gobble_whitespace (); | |
6de9cd9a DN |
1018 | |
1019 | c = gfc_next_char (); | |
1020 | if (c != '\'' && c != '"') | |
1021 | goto no_match; | |
1022 | ||
66faed76 DF |
1023 | start_locus = gfc_current_locus; |
1024 | ||
6de9cd9a DN |
1025 | if (kind == -1) |
1026 | { | |
1027 | q = gfc_extract_int (sym->value, &kind); | |
1028 | if (q != NULL) | |
1029 | { | |
1030 | gfc_error (q); | |
1031 | return MATCH_ERROR; | |
1032 | } | |
a39fafac | 1033 | gfc_set_sym_referenced (sym); |
6de9cd9a DN |
1034 | } |
1035 | ||
e7a2d5fb | 1036 | if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
6de9cd9a DN |
1037 | { |
1038 | gfc_error ("Invalid kind %d for CHARACTER constant at %C", kind); | |
1039 | return MATCH_ERROR; | |
1040 | } | |
1041 | ||
1042 | got_delim: | |
1043 | /* Scan the string into a block of memory by first figuring out how | |
1044 | long it is, allocating the structure, then re-reading it. This | |
1045 | isn't particularly efficient, but string constants aren't that | |
1046 | common in most code. TODO: Use obstacks? */ | |
1047 | ||
1048 | delimiter = c; | |
1049 | length = 0; | |
1050 | ||
1051 | for (;;) | |
1052 | { | |
8fc541d3 FXC |
1053 | c = next_string_char (delimiter, &ret); |
1054 | if (ret == -1) | |
6de9cd9a | 1055 | break; |
8fc541d3 | 1056 | if (ret == -2) |
6de9cd9a | 1057 | { |
63645982 | 1058 | gfc_current_locus = start_locus; |
6de9cd9a DN |
1059 | gfc_error ("Unterminated character constant beginning at %C"); |
1060 | return MATCH_ERROR; | |
1061 | } | |
1062 | ||
1063 | length++; | |
1064 | } | |
1065 | ||
78019d16 SK |
1066 | /* Peek at the next character to see if it is a b, o, z, or x for the |
1067 | postfixed BOZ literal constants. */ | |
8fc541d3 FXC |
1068 | peek = gfc_peek_ascii_char (); |
1069 | if (peek == 'b' || peek == 'o' || peek =='z' || peek == 'x') | |
78019d16 SK |
1070 | goto no_match; |
1071 | ||
b7e75771 | 1072 | e = gfc_get_character_expr (kind, &start_locus, NULL, length); |
6de9cd9a | 1073 | |
63645982 | 1074 | gfc_current_locus = start_locus; |
6de9cd9a | 1075 | |
1355d8e7 TB |
1076 | /* We disable the warning for the following loop as the warning has already |
1077 | been printed in the loop above. */ | |
1078 | warn_ampersand = gfc_option.warn_ampersand; | |
1079 | gfc_option.warn_ampersand = 0; | |
1080 | ||
b7e75771 | 1081 | p = e->value.character.string; |
6de9cd9a | 1082 | for (i = 0; i < length; i++) |
8fc541d3 FXC |
1083 | { |
1084 | c = next_string_char (delimiter, &ret); | |
1085 | ||
d393bbd7 | 1086 | if (!gfc_check_character_range (c, kind)) |
8fc541d3 | 1087 | { |
efb63364 | 1088 | gfc_free_expr (e); |
d393bbd7 FXC |
1089 | gfc_error ("Character '%s' in string at %C is not representable " |
1090 | "in character kind %d", gfc_print_wide_char (c), kind); | |
8fc541d3 FXC |
1091 | return MATCH_ERROR; |
1092 | } | |
1093 | ||
00660189 | 1094 | *p++ = c; |
8fc541d3 | 1095 | } |
6de9cd9a DN |
1096 | |
1097 | *p = '\0'; /* TODO: C-style string is for development/debug purposes. */ | |
1355d8e7 | 1098 | gfc_option.warn_ampersand = warn_ampersand; |
6de9cd9a | 1099 | |
8fc541d3 FXC |
1100 | next_string_char (delimiter, &ret); |
1101 | if (ret != -1) | |
6de9cd9a DN |
1102 | gfc_internal_error ("match_string_constant(): Delimiter not found"); |
1103 | ||
1104 | if (match_substring (NULL, 0, &e->ref) != MATCH_NO) | |
1105 | e->expr_type = EXPR_SUBSTRING; | |
1106 | ||
1107 | *result = e; | |
1108 | ||
1109 | return MATCH_YES; | |
1110 | ||
1111 | no_match: | |
63645982 | 1112 | gfc_current_locus = old_locus; |
6de9cd9a DN |
1113 | return MATCH_NO; |
1114 | } | |
1115 | ||
1116 | ||
500f8f7b RS |
1117 | /* Match a .true. or .false. Returns 1 if a .true. was found, |
1118 | 0 if a .false. was found, and -1 otherwise. */ | |
1119 | static int | |
1120 | match_logical_constant_string (void) | |
1121 | { | |
1122 | locus orig_loc = gfc_current_locus; | |
1123 | ||
1124 | gfc_gobble_whitespace (); | |
8fc541d3 | 1125 | if (gfc_next_ascii_char () == '.') |
500f8f7b | 1126 | { |
8fc541d3 | 1127 | char ch = gfc_next_ascii_char (); |
500f8f7b RS |
1128 | if (ch == 'f') |
1129 | { | |
8fc541d3 FXC |
1130 | if (gfc_next_ascii_char () == 'a' |
1131 | && gfc_next_ascii_char () == 'l' | |
1132 | && gfc_next_ascii_char () == 's' | |
1133 | && gfc_next_ascii_char () == 'e' | |
1134 | && gfc_next_ascii_char () == '.') | |
500f8f7b RS |
1135 | /* Matched ".false.". */ |
1136 | return 0; | |
1137 | } | |
1138 | else if (ch == 't') | |
1139 | { | |
8fc541d3 FXC |
1140 | if (gfc_next_ascii_char () == 'r' |
1141 | && gfc_next_ascii_char () == 'u' | |
1142 | && gfc_next_ascii_char () == 'e' | |
1143 | && gfc_next_ascii_char () == '.') | |
500f8f7b RS |
1144 | /* Matched ".true.". */ |
1145 | return 1; | |
1146 | } | |
1147 | } | |
1148 | gfc_current_locus = orig_loc; | |
1149 | return -1; | |
1150 | } | |
1151 | ||
6de9cd9a DN |
1152 | /* Match a .true. or .false. */ |
1153 | ||
1154 | static match | |
edf1eac2 | 1155 | match_logical_constant (gfc_expr **result) |
6de9cd9a | 1156 | { |
6de9cd9a | 1157 | gfc_expr *e; |
bee64a2b | 1158 | int i, kind, is_iso_c; |
6de9cd9a | 1159 | |
500f8f7b | 1160 | i = match_logical_constant_string (); |
6de9cd9a DN |
1161 | if (i == -1) |
1162 | return MATCH_NO; | |
1163 | ||
bee64a2b | 1164 | kind = get_kind (&is_iso_c); |
6de9cd9a DN |
1165 | if (kind == -1) |
1166 | return MATCH_ERROR; | |
1167 | if (kind == -2) | |
9d64df18 | 1168 | kind = gfc_default_logical_kind; |
6de9cd9a | 1169 | |
e7a2d5fb | 1170 | if (gfc_validate_kind (BT_LOGICAL, kind, true) < 0) |
eb62be44 SK |
1171 | { |
1172 | gfc_error ("Bad kind for logical constant at %C"); | |
1173 | return MATCH_ERROR; | |
1174 | } | |
6de9cd9a | 1175 | |
b7e75771 | 1176 | e = gfc_get_logical_expr (kind, &gfc_current_locus, i); |
bee64a2b | 1177 | e->ts.is_c_interop = is_iso_c; |
6de9cd9a DN |
1178 | |
1179 | *result = e; | |
1180 | return MATCH_YES; | |
1181 | } | |
1182 | ||
1183 | ||
1184 | /* Match a real or imaginary part of a complex constant that is a | |
1185 | symbolic constant. */ | |
1186 | ||
1187 | static match | |
edf1eac2 | 1188 | match_sym_complex_part (gfc_expr **result) |
6de9cd9a DN |
1189 | { |
1190 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1191 | gfc_symbol *sym; | |
1192 | gfc_expr *e; | |
1193 | match m; | |
1194 | ||
1195 | m = gfc_match_name (name); | |
1196 | if (m != MATCH_YES) | |
1197 | return m; | |
1198 | ||
1199 | if (gfc_find_symbol (name, NULL, 1, &sym) || sym == NULL) | |
1200 | return MATCH_NO; | |
1201 | ||
1202 | if (sym->attr.flavor != FL_PARAMETER) | |
1203 | { | |
1204 | gfc_error ("Expected PARAMETER symbol in complex constant at %C"); | |
1205 | return MATCH_ERROR; | |
1206 | } | |
1207 | ||
1208 | if (!gfc_numeric_ts (&sym->value->ts)) | |
1209 | { | |
1210 | gfc_error ("Numeric PARAMETER required in complex constant at %C"); | |
1211 | return MATCH_ERROR; | |
1212 | } | |
1213 | ||
1214 | if (sym->value->rank != 0) | |
1215 | { | |
1216 | gfc_error ("Scalar PARAMETER required in complex constant at %C"); | |
1217 | return MATCH_ERROR; | |
1218 | } | |
1219 | ||
9717f7a1 | 1220 | if (gfc_notify_std (GFC_STD_F2003, "PARAMETER symbol in " |
e227ac57 FXC |
1221 | "complex constant at %C") == FAILURE) |
1222 | return MATCH_ERROR; | |
1223 | ||
6de9cd9a DN |
1224 | switch (sym->value->ts.type) |
1225 | { | |
1226 | case BT_REAL: | |
1227 | e = gfc_copy_expr (sym->value); | |
1228 | break; | |
1229 | ||
1230 | case BT_COMPLEX: | |
1231 | e = gfc_complex2real (sym->value, sym->value->ts.kind); | |
1232 | if (e == NULL) | |
1233 | goto error; | |
1234 | break; | |
1235 | ||
1236 | case BT_INTEGER: | |
9d64df18 | 1237 | e = gfc_int2real (sym->value, gfc_default_real_kind); |
6de9cd9a DN |
1238 | if (e == NULL) |
1239 | goto error; | |
1240 | break; | |
1241 | ||
1242 | default: | |
1243 | gfc_internal_error ("gfc_match_sym_complex_part(): Bad type"); | |
1244 | } | |
1245 | ||
edf1eac2 | 1246 | *result = e; /* e is a scalar, real, constant expression. */ |
6de9cd9a DN |
1247 | return MATCH_YES; |
1248 | ||
1249 | error: | |
1250 | gfc_error ("Error converting PARAMETER constant in complex constant at %C"); | |
1251 | return MATCH_ERROR; | |
1252 | } | |
1253 | ||
1254 | ||
6de9cd9a DN |
1255 | /* Match a real or imaginary part of a complex number. */ |
1256 | ||
1257 | static match | |
edf1eac2 | 1258 | match_complex_part (gfc_expr **result) |
6de9cd9a DN |
1259 | { |
1260 | match m; | |
1261 | ||
1262 | m = match_sym_complex_part (result); | |
1263 | if (m != MATCH_NO) | |
1264 | return m; | |
1265 | ||
69029c61 PB |
1266 | m = match_real_constant (result, 1); |
1267 | if (m != MATCH_NO) | |
1268 | return m; | |
1269 | ||
1270 | return match_integer_constant (result, 1); | |
6de9cd9a DN |
1271 | } |
1272 | ||
1273 | ||
1274 | /* Try to match a complex constant. */ | |
1275 | ||
1276 | static match | |
edf1eac2 | 1277 | match_complex_constant (gfc_expr **result) |
6de9cd9a DN |
1278 | { |
1279 | gfc_expr *e, *real, *imag; | |
1280 | gfc_error_buf old_error; | |
1281 | gfc_typespec target; | |
1282 | locus old_loc; | |
1283 | int kind; | |
1284 | match m; | |
1285 | ||
63645982 | 1286 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1287 | real = imag = e = NULL; |
1288 | ||
1289 | m = gfc_match_char ('('); | |
1290 | if (m != MATCH_YES) | |
1291 | return m; | |
1292 | ||
1293 | gfc_push_error (&old_error); | |
1294 | ||
1295 | m = match_complex_part (&real); | |
1296 | if (m == MATCH_NO) | |
d71b89ca JJ |
1297 | { |
1298 | gfc_free_error (&old_error); | |
1299 | goto cleanup; | |
1300 | } | |
6de9cd9a DN |
1301 | |
1302 | if (gfc_match_char (',') == MATCH_NO) | |
1303 | { | |
1304 | gfc_pop_error (&old_error); | |
1305 | m = MATCH_NO; | |
1306 | goto cleanup; | |
1307 | } | |
1308 | ||
1309 | /* If m is error, then something was wrong with the real part and we | |
1310 | assume we have a complex constant because we've seen the ','. An | |
1311 | ambiguous case here is the start of an iterator list of some | |
1312 | sort. These sort of lists are matched prior to coming here. */ | |
1313 | ||
1314 | if (m == MATCH_ERROR) | |
d71b89ca JJ |
1315 | { |
1316 | gfc_free_error (&old_error); | |
1317 | goto cleanup; | |
1318 | } | |
6de9cd9a DN |
1319 | gfc_pop_error (&old_error); |
1320 | ||
1321 | m = match_complex_part (&imag); | |
1322 | if (m == MATCH_NO) | |
1323 | goto syntax; | |
1324 | if (m == MATCH_ERROR) | |
1325 | goto cleanup; | |
1326 | ||
1327 | m = gfc_match_char (')'); | |
1328 | if (m == MATCH_NO) | |
87ebdf2f SK |
1329 | { |
1330 | /* Give the matcher for implied do-loops a chance to run. This | |
1331 | yields a much saner error message for (/ (i, 4=i, 6) /). */ | |
8fc541d3 | 1332 | if (gfc_peek_ascii_char () == '=') |
87ebdf2f SK |
1333 | { |
1334 | m = MATCH_ERROR; | |
1335 | goto cleanup; | |
1336 | } | |
1337 | else | |
6de9cd9a | 1338 | goto syntax; |
87ebdf2f | 1339 | } |
6de9cd9a DN |
1340 | |
1341 | if (m == MATCH_ERROR) | |
1342 | goto cleanup; | |
1343 | ||
1344 | /* Decide on the kind of this complex number. */ | |
69029c61 PB |
1345 | if (real->ts.type == BT_REAL) |
1346 | { | |
1347 | if (imag->ts.type == BT_REAL) | |
1348 | kind = gfc_kind_max (real, imag); | |
1349 | else | |
1350 | kind = real->ts.kind; | |
1351 | } | |
1352 | else | |
1353 | { | |
1354 | if (imag->ts.type == BT_REAL) | |
1355 | kind = imag->ts.kind; | |
1356 | else | |
1357 | kind = gfc_default_real_kind; | |
1358 | } | |
d91909c0 | 1359 | gfc_clear_ts (&target); |
6de9cd9a DN |
1360 | target.type = BT_REAL; |
1361 | target.kind = kind; | |
1362 | ||
69029c61 | 1363 | if (real->ts.type != BT_REAL || kind != real->ts.kind) |
6de9cd9a | 1364 | gfc_convert_type (real, &target, 2); |
69029c61 | 1365 | if (imag->ts.type != BT_REAL || kind != imag->ts.kind) |
6de9cd9a DN |
1366 | gfc_convert_type (imag, &target, 2); |
1367 | ||
1368 | e = gfc_convert_complex (real, imag, kind); | |
63645982 | 1369 | e->where = gfc_current_locus; |
6de9cd9a DN |
1370 | |
1371 | gfc_free_expr (real); | |
1372 | gfc_free_expr (imag); | |
1373 | ||
1374 | *result = e; | |
1375 | return MATCH_YES; | |
1376 | ||
1377 | syntax: | |
1378 | gfc_error ("Syntax error in COMPLEX constant at %C"); | |
1379 | m = MATCH_ERROR; | |
1380 | ||
1381 | cleanup: | |
1382 | gfc_free_expr (e); | |
1383 | gfc_free_expr (real); | |
1384 | gfc_free_expr (imag); | |
63645982 | 1385 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1386 | |
1387 | return m; | |
1388 | } | |
1389 | ||
1390 | ||
1391 | /* Match constants in any of several forms. Returns nonzero for a | |
1392 | match, zero for no match. */ | |
1393 | ||
1394 | match | |
edf1eac2 | 1395 | gfc_match_literal_constant (gfc_expr **result, int signflag) |
6de9cd9a DN |
1396 | { |
1397 | match m; | |
1398 | ||
1399 | m = match_complex_constant (result); | |
1400 | if (m != MATCH_NO) | |
1401 | return m; | |
1402 | ||
1403 | m = match_string_constant (result); | |
1404 | if (m != MATCH_NO) | |
1405 | return m; | |
1406 | ||
1407 | m = match_boz_constant (result); | |
1408 | if (m != MATCH_NO) | |
1409 | return m; | |
1410 | ||
1411 | m = match_real_constant (result, signflag); | |
1412 | if (m != MATCH_NO) | |
1413 | return m; | |
1414 | ||
d3642f89 FW |
1415 | m = match_hollerith_constant (result); |
1416 | if (m != MATCH_NO) | |
1417 | return m; | |
1418 | ||
6de9cd9a DN |
1419 | m = match_integer_constant (result, signflag); |
1420 | if (m != MATCH_NO) | |
1421 | return m; | |
1422 | ||
1423 | m = match_logical_constant (result); | |
1424 | if (m != MATCH_NO) | |
1425 | return m; | |
1426 | ||
1427 | return MATCH_NO; | |
1428 | } | |
1429 | ||
1430 | ||
2d71b918 JW |
1431 | /* This checks if a symbol is the return value of an encompassing function. |
1432 | Function nesting can be maximally two levels deep, but we may have | |
1433 | additional local namespaces like BLOCK etc. */ | |
1434 | ||
1435 | bool | |
1436 | gfc_is_function_return_value (gfc_symbol *sym, gfc_namespace *ns) | |
1437 | { | |
1438 | if (!sym->attr.function || (sym->result != sym)) | |
1439 | return false; | |
1440 | while (ns) | |
1441 | { | |
1442 | if (ns->proc_name == sym) | |
1443 | return true; | |
1444 | ns = ns->parent; | |
1445 | } | |
1446 | return false; | |
1447 | } | |
1448 | ||
1449 | ||
6de9cd9a DN |
1450 | /* Match a single actual argument value. An actual argument is |
1451 | usually an expression, but can also be a procedure name. If the | |
1452 | argument is a single name, it is not always possible to tell | |
1453 | whether the name is a dummy procedure or not. We treat these cases | |
1454 | by creating an argument that looks like a dummy procedure and | |
1455 | fixing things later during resolution. */ | |
1456 | ||
1457 | static match | |
edf1eac2 | 1458 | match_actual_arg (gfc_expr **result) |
6de9cd9a DN |
1459 | { |
1460 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1461 | gfc_symtree *symtree; | |
1462 | locus where, w; | |
1463 | gfc_expr *e; | |
8fc541d3 | 1464 | char c; |
6de9cd9a | 1465 | |
618f4f46 | 1466 | gfc_gobble_whitespace (); |
63645982 | 1467 | where = gfc_current_locus; |
6de9cd9a DN |
1468 | |
1469 | switch (gfc_match_name (name)) | |
1470 | { | |
1471 | case MATCH_ERROR: | |
1472 | return MATCH_ERROR; | |
1473 | ||
1474 | case MATCH_NO: | |
1475 | break; | |
1476 | ||
1477 | case MATCH_YES: | |
63645982 | 1478 | w = gfc_current_locus; |
6de9cd9a | 1479 | gfc_gobble_whitespace (); |
8fc541d3 | 1480 | c = gfc_next_ascii_char (); |
63645982 | 1481 | gfc_current_locus = w; |
6de9cd9a DN |
1482 | |
1483 | if (c != ',' && c != ')') | |
1484 | break; | |
1485 | ||
1486 | if (gfc_find_sym_tree (name, NULL, 1, &symtree)) | |
1487 | break; | |
1488 | /* Handle error elsewhere. */ | |
1489 | ||
1490 | /* Eliminate a couple of common cases where we know we don't | |
edf1eac2 | 1491 | have a function argument. */ |
6de9cd9a | 1492 | if (symtree == NULL) |
edf1eac2 | 1493 | { |
08a6b8e0 | 1494 | gfc_get_sym_tree (name, NULL, &symtree, false); |
edf1eac2 SK |
1495 | gfc_set_sym_referenced (symtree->n.sym); |
1496 | } | |
6de9cd9a DN |
1497 | else |
1498 | { | |
edf1eac2 | 1499 | gfc_symbol *sym; |
6de9cd9a | 1500 | |
edf1eac2 SK |
1501 | sym = symtree->n.sym; |
1502 | gfc_set_sym_referenced (sym); | |
6de9cd9a DN |
1503 | if (sym->attr.flavor != FL_PROCEDURE |
1504 | && sym->attr.flavor != FL_UNKNOWN) | |
1505 | break; | |
1506 | ||
6f9c9d6d TB |
1507 | if (sym->attr.in_common && !sym->attr.proc_pointer) |
1508 | { | |
efb63364 TB |
1509 | if (gfc_add_flavor (&sym->attr, FL_VARIABLE, sym->name, |
1510 | &sym->declared_at) == FAILURE) | |
1511 | return MATCH_ERROR; | |
6f9c9d6d TB |
1512 | break; |
1513 | } | |
1514 | ||
6de9cd9a DN |
1515 | /* If the symbol is a function with itself as the result and |
1516 | is being defined, then we have a variable. */ | |
7a4ef45b JJ |
1517 | if (sym->attr.function && sym->result == sym) |
1518 | { | |
2d71b918 | 1519 | if (gfc_is_function_return_value (sym, gfc_current_ns)) |
7a4ef45b JJ |
1520 | break; |
1521 | ||
1522 | if (sym->attr.entry | |
1523 | && (sym->ns == gfc_current_ns | |
1524 | || sym->ns == gfc_current_ns->parent)) | |
1525 | { | |
1526 | gfc_entry_list *el = NULL; | |
1527 | ||
1528 | for (el = sym->ns->entries; el; el = el->next) | |
1529 | if (sym == el->sym) | |
1530 | break; | |
1531 | ||
1532 | if (el) | |
1533 | break; | |
1534 | } | |
1535 | } | |
6de9cd9a DN |
1536 | } |
1537 | ||
1538 | e = gfc_get_expr (); /* Leave it unknown for now */ | |
1539 | e->symtree = symtree; | |
1540 | e->expr_type = EXPR_VARIABLE; | |
1541 | e->ts.type = BT_PROCEDURE; | |
1542 | e->where = where; | |
1543 | ||
1544 | *result = e; | |
1545 | return MATCH_YES; | |
1546 | } | |
1547 | ||
63645982 | 1548 | gfc_current_locus = where; |
6de9cd9a DN |
1549 | return gfc_match_expr (result); |
1550 | } | |
1551 | ||
1552 | ||
1553 | /* Match a keyword argument. */ | |
1554 | ||
1555 | static match | |
edf1eac2 | 1556 | match_keyword_arg (gfc_actual_arglist *actual, gfc_actual_arglist *base) |
6de9cd9a DN |
1557 | { |
1558 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1559 | gfc_actual_arglist *a; | |
1560 | locus name_locus; | |
1561 | match m; | |
1562 | ||
63645982 | 1563 | name_locus = gfc_current_locus; |
6de9cd9a DN |
1564 | m = gfc_match_name (name); |
1565 | ||
1566 | if (m != MATCH_YES) | |
1567 | goto cleanup; | |
1568 | if (gfc_match_char ('=') != MATCH_YES) | |
1569 | { | |
1570 | m = MATCH_NO; | |
1571 | goto cleanup; | |
1572 | } | |
1573 | ||
1574 | m = match_actual_arg (&actual->expr); | |
1575 | if (m != MATCH_YES) | |
1576 | goto cleanup; | |
1577 | ||
1578 | /* Make sure this name has not appeared yet. */ | |
1579 | ||
1580 | if (name[0] != '\0') | |
1581 | { | |
1582 | for (a = base; a; a = a->next) | |
cb9e4f55 | 1583 | if (a->name != NULL && strcmp (a->name, name) == 0) |
6de9cd9a | 1584 | { |
edf1eac2 SK |
1585 | gfc_error ("Keyword '%s' at %C has already appeared in the " |
1586 | "current argument list", name); | |
6de9cd9a DN |
1587 | return MATCH_ERROR; |
1588 | } | |
1589 | } | |
1590 | ||
cb9e4f55 | 1591 | actual->name = gfc_get_string (name); |
6de9cd9a DN |
1592 | return MATCH_YES; |
1593 | ||
1594 | cleanup: | |
63645982 | 1595 | gfc_current_locus = name_locus; |
6de9cd9a DN |
1596 | return m; |
1597 | } | |
1598 | ||
1599 | ||
7fcafa71 PT |
1600 | /* Match an argument list function, such as %VAL. */ |
1601 | ||
1602 | static match | |
1603 | match_arg_list_function (gfc_actual_arglist *result) | |
1604 | { | |
1605 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1606 | locus old_locus; | |
1607 | match m; | |
1608 | ||
1609 | old_locus = gfc_current_locus; | |
1610 | ||
1611 | if (gfc_match_char ('%') != MATCH_YES) | |
1612 | { | |
1613 | m = MATCH_NO; | |
1614 | goto cleanup; | |
1615 | } | |
1616 | ||
1617 | m = gfc_match ("%n (", name); | |
1618 | if (m != MATCH_YES) | |
1619 | goto cleanup; | |
1620 | ||
1621 | if (name[0] != '\0') | |
1622 | { | |
1623 | switch (name[0]) | |
1624 | { | |
1625 | case 'l': | |
edf1eac2 | 1626 | if (strncmp (name, "loc", 3) == 0) |
7fcafa71 PT |
1627 | { |
1628 | result->name = "%LOC"; | |
1629 | break; | |
1630 | } | |
1631 | case 'r': | |
edf1eac2 | 1632 | if (strncmp (name, "ref", 3) == 0) |
7fcafa71 PT |
1633 | { |
1634 | result->name = "%REF"; | |
1635 | break; | |
1636 | } | |
1637 | case 'v': | |
edf1eac2 | 1638 | if (strncmp (name, "val", 3) == 0) |
7fcafa71 PT |
1639 | { |
1640 | result->name = "%VAL"; | |
1641 | break; | |
1642 | } | |
1643 | default: | |
1644 | m = MATCH_ERROR; | |
1645 | goto cleanup; | |
1646 | } | |
1647 | } | |
1648 | ||
9717f7a1 | 1649 | if (gfc_notify_std (GFC_STD_GNU, "argument list " |
7fcafa71 PT |
1650 | "function at %C") == FAILURE) |
1651 | { | |
1652 | m = MATCH_ERROR; | |
1653 | goto cleanup; | |
1654 | } | |
1655 | ||
1656 | m = match_actual_arg (&result->expr); | |
1657 | if (m != MATCH_YES) | |
1658 | goto cleanup; | |
1659 | ||
1660 | if (gfc_match_char (')') != MATCH_YES) | |
1661 | { | |
1662 | m = MATCH_NO; | |
1663 | goto cleanup; | |
1664 | } | |
1665 | ||
1666 | return MATCH_YES; | |
1667 | ||
1668 | cleanup: | |
1669 | gfc_current_locus = old_locus; | |
1670 | return m; | |
1671 | } | |
1672 | ||
1673 | ||
6de9cd9a DN |
1674 | /* Matches an actual argument list of a function or subroutine, from |
1675 | the opening parenthesis to the closing parenthesis. The argument | |
1676 | list is assumed to allow keyword arguments because we don't know if | |
1677 | the symbol associated with the procedure has an implicit interface | |
ed5ee445 | 1678 | or not. We make sure keywords are unique. If sub_flag is set, |
d3fcc995 | 1679 | we're matching the argument list of a subroutine. */ |
6de9cd9a DN |
1680 | |
1681 | match | |
edf1eac2 | 1682 | gfc_match_actual_arglist (int sub_flag, gfc_actual_arglist **argp) |
6de9cd9a DN |
1683 | { |
1684 | gfc_actual_arglist *head, *tail; | |
1685 | int seen_keyword; | |
1686 | gfc_st_label *label; | |
1687 | locus old_loc; | |
1688 | match m; | |
1689 | ||
1690 | *argp = tail = NULL; | |
63645982 | 1691 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1692 | |
1693 | seen_keyword = 0; | |
1694 | ||
1695 | if (gfc_match_char ('(') == MATCH_NO) | |
1696 | return (sub_flag) ? MATCH_YES : MATCH_NO; | |
1697 | ||
1698 | if (gfc_match_char (')') == MATCH_YES) | |
1699 | return MATCH_YES; | |
1700 | head = NULL; | |
1701 | ||
837c4b78 JW |
1702 | matching_actual_arglist++; |
1703 | ||
6de9cd9a DN |
1704 | for (;;) |
1705 | { | |
1706 | if (head == NULL) | |
1707 | head = tail = gfc_get_actual_arglist (); | |
1708 | else | |
1709 | { | |
1710 | tail->next = gfc_get_actual_arglist (); | |
1711 | tail = tail->next; | |
1712 | } | |
1713 | ||
1714 | if (sub_flag && gfc_match_char ('*') == MATCH_YES) | |
1715 | { | |
a34a91f0 | 1716 | m = gfc_match_st_label (&label); |
6de9cd9a DN |
1717 | if (m == MATCH_NO) |
1718 | gfc_error ("Expected alternate return label at %C"); | |
1719 | if (m != MATCH_YES) | |
1720 | goto cleanup; | |
1721 | ||
fbdeeaac JW |
1722 | if (gfc_notify_std (GFC_STD_F95_OBS, "Alternate-return argument " |
1723 | "at %C") == FAILURE) | |
1724 | goto cleanup; | |
1725 | ||
6de9cd9a DN |
1726 | tail->label = label; |
1727 | goto next; | |
1728 | } | |
1729 | ||
1730 | /* After the first keyword argument is seen, the following | |
edf1eac2 | 1731 | arguments must also have keywords. */ |
6de9cd9a DN |
1732 | if (seen_keyword) |
1733 | { | |
1734 | m = match_keyword_arg (tail, head); | |
1735 | ||
1736 | if (m == MATCH_ERROR) | |
1737 | goto cleanup; | |
1738 | if (m == MATCH_NO) | |
1739 | { | |
edf1eac2 | 1740 | gfc_error ("Missing keyword name in actual argument list at %C"); |
6de9cd9a DN |
1741 | goto cleanup; |
1742 | } | |
1743 | ||
1744 | } | |
1745 | else | |
1746 | { | |
7fcafa71 PT |
1747 | /* Try an argument list function, like %VAL. */ |
1748 | m = match_arg_list_function (tail); | |
6de9cd9a DN |
1749 | if (m == MATCH_ERROR) |
1750 | goto cleanup; | |
1751 | ||
7fcafa71 PT |
1752 | /* See if we have the first keyword argument. */ |
1753 | if (m == MATCH_NO) | |
1754 | { | |
1755 | m = match_keyword_arg (tail, head); | |
1756 | if (m == MATCH_YES) | |
1757 | seen_keyword = 1; | |
1758 | if (m == MATCH_ERROR) | |
1759 | goto cleanup; | |
1760 | } | |
1761 | ||
6de9cd9a DN |
1762 | if (m == MATCH_NO) |
1763 | { | |
1764 | /* Try for a non-keyword argument. */ | |
1765 | m = match_actual_arg (&tail->expr); | |
1766 | if (m == MATCH_ERROR) | |
1767 | goto cleanup; | |
1768 | if (m == MATCH_NO) | |
1769 | goto syntax; | |
1770 | } | |
1771 | } | |
1772 | ||
7fcafa71 | 1773 | |
6de9cd9a DN |
1774 | next: |
1775 | if (gfc_match_char (')') == MATCH_YES) | |
1776 | break; | |
1777 | if (gfc_match_char (',') != MATCH_YES) | |
1778 | goto syntax; | |
1779 | } | |
1780 | ||
1781 | *argp = head; | |
837c4b78 | 1782 | matching_actual_arglist--; |
6de9cd9a DN |
1783 | return MATCH_YES; |
1784 | ||
1785 | syntax: | |
1786 | gfc_error ("Syntax error in argument list at %C"); | |
1787 | ||
1788 | cleanup: | |
1789 | gfc_free_actual_arglist (head); | |
63645982 | 1790 | gfc_current_locus = old_loc; |
837c4b78 | 1791 | matching_actual_arglist--; |
6de9cd9a DN |
1792 | return MATCH_ERROR; |
1793 | } | |
1794 | ||
1795 | ||
8e1f752a | 1796 | /* Used by gfc_match_varspec() to extend the reference list by one |
6de9cd9a DN |
1797 | element. */ |
1798 | ||
1799 | static gfc_ref * | |
edf1eac2 | 1800 | extend_ref (gfc_expr *primary, gfc_ref *tail) |
6de9cd9a | 1801 | { |
6de9cd9a DN |
1802 | if (primary->ref == NULL) |
1803 | primary->ref = tail = gfc_get_ref (); | |
1804 | else | |
1805 | { | |
1806 | if (tail == NULL) | |
1807 | gfc_internal_error ("extend_ref(): Bad tail"); | |
1808 | tail->next = gfc_get_ref (); | |
1809 | tail = tail->next; | |
1810 | } | |
1811 | ||
1812 | return tail; | |
1813 | } | |
1814 | ||
1815 | ||
1816 | /* Match any additional specifications associated with the current | |
1817 | variable like member references or substrings. If equiv_flag is | |
1818 | set we only match stuff that is allowed inside an EQUIVALENCE | |
8e1f752a | 1819 | statement. sub_flag tells whether we expect a type-bound procedure found |
713485cc JW |
1820 | to be a subroutine as part of CALL or a FUNCTION. For procedure pointer |
1821 | components, 'ppc_arg' determines whether the PPC may be called (with an | |
1822 | argument list), or whether it may just be referred to as a pointer. */ | |
6de9cd9a | 1823 | |
8e1f752a | 1824 | match |
713485cc JW |
1825 | gfc_match_varspec (gfc_expr *primary, int equiv_flag, bool sub_flag, |
1826 | bool ppc_arg) | |
6de9cd9a DN |
1827 | { |
1828 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1829 | gfc_ref *substring, *tail; | |
1830 | gfc_component *component; | |
a8006d09 | 1831 | gfc_symbol *sym = primary->symtree->n.sym; |
6de9cd9a | 1832 | match m; |
f2d3cb25 | 1833 | bool unknown; |
6de9cd9a DN |
1834 | |
1835 | tail = NULL; | |
1836 | ||
3c721513 | 1837 | gfc_gobble_whitespace (); |
d3a9eea2 TB |
1838 | |
1839 | if (gfc_peek_ascii_char () == '[') | |
1840 | { | |
c49ea23d PT |
1841 | if ((sym->ts.type != BT_CLASS && sym->attr.dimension) |
1842 | || (sym->ts.type == BT_CLASS && CLASS_DATA (sym) | |
1843 | && CLASS_DATA (sym)->attr.dimension)) | |
d3a9eea2 TB |
1844 | { |
1845 | gfc_error ("Array section designator, e.g. '(:)', is required " | |
1846 | "besides the coarray designator '[...]' at %C"); | |
1847 | return MATCH_ERROR; | |
1848 | } | |
c49ea23d PT |
1849 | if ((sym->ts.type != BT_CLASS && !sym->attr.codimension) |
1850 | || (sym->ts.type == BT_CLASS && CLASS_DATA (sym) | |
1851 | && !CLASS_DATA (sym)->attr.codimension)) | |
d3a9eea2 TB |
1852 | { |
1853 | gfc_error ("Coarray designator at %C but '%s' is not a coarray", | |
1854 | sym->name); | |
1855 | return MATCH_ERROR; | |
1856 | } | |
1857 | } | |
1858 | ||
52bf62f9 DK |
1859 | /* For associate names, we may not yet know whether they are arrays or not. |
1860 | Thus if we have one and parentheses follow, we have to assume that it | |
1861 | actually is one for now. The final decision will be made at | |
1862 | resolution time, of course. */ | |
1863 | if (sym->assoc && gfc_peek_ascii_char () == '(') | |
1864 | sym->attr.dimension = 1; | |
1865 | ||
c74b74a8 | 1866 | if ((equiv_flag && gfc_peek_ascii_char () == '(') |
d3a9eea2 | 1867 | || gfc_peek_ascii_char () == '[' || sym->attr.codimension |
ce2ab24c | 1868 | || (sym->attr.dimension && sym->ts.type != BT_CLASS |
2a573572 | 1869 | && !sym->attr.proc_pointer && !gfc_is_proc_ptr_comp (primary) |
f64edc8b | 1870 | && !(gfc_matching_procptr_assignment |
cf2b3c22 | 1871 | && sym->attr.flavor == FL_PROCEDURE)) |
22061030 | 1872 | || (sym->ts.type == BT_CLASS && sym->attr.class_ok |
492792ed TB |
1873 | && (CLASS_DATA (sym)->attr.dimension |
1874 | || CLASS_DATA (sym)->attr.codimension))) | |
6de9cd9a | 1875 | { |
102344e2 TB |
1876 | gfc_array_spec *as; |
1877 | ||
1878 | tail = extend_ref (primary, tail); | |
1879 | tail->type = REF_ARRAY; | |
1880 | ||
a8006d09 JJ |
1881 | /* In EQUIVALENCE, we don't know yet whether we are seeing |
1882 | an array, character variable or array of character | |
edf1eac2 | 1883 | variables. We'll leave the decision till resolve time. */ |
6de9cd9a | 1884 | |
102344e2 TB |
1885 | if (equiv_flag) |
1886 | as = NULL; | |
1887 | else if (sym->ts.type == BT_CLASS && CLASS_DATA (sym)) | |
1888 | as = CLASS_DATA (sym)->as; | |
1889 | else | |
1890 | as = sym->as; | |
1891 | ||
1892 | m = gfc_match_array_ref (&tail->u.ar, as, equiv_flag, | |
1893 | as ? as->corank : 0); | |
6de9cd9a DN |
1894 | if (m != MATCH_YES) |
1895 | return m; | |
a8006d09 | 1896 | |
3c721513 | 1897 | gfc_gobble_whitespace (); |
8fc541d3 | 1898 | if (equiv_flag && gfc_peek_ascii_char () == '(') |
a8006d09 JJ |
1899 | { |
1900 | tail = extend_ref (primary, tail); | |
1901 | tail->type = REF_ARRAY; | |
1902 | ||
d3a9eea2 | 1903 | m = gfc_match_array_ref (&tail->u.ar, NULL, equiv_flag, 0); |
a8006d09 JJ |
1904 | if (m != MATCH_YES) |
1905 | return m; | |
1906 | } | |
6de9cd9a DN |
1907 | } |
1908 | ||
6de9cd9a DN |
1909 | primary->ts = sym->ts; |
1910 | ||
a8006d09 JJ |
1911 | if (equiv_flag) |
1912 | return MATCH_YES; | |
1913 | ||
ebac6d9c | 1914 | if (sym->ts.type == BT_UNKNOWN && gfc_peek_ascii_char () == '%' |
713485cc | 1915 | && gfc_get_default_type (sym->name, sym->ns)->type == BT_DERIVED) |
ebac6d9c DK |
1916 | gfc_set_default_type (sym, 0, sym->ns); |
1917 | ||
6ee65df3 TB |
1918 | if (sym->ts.type == BT_UNKNOWN && gfc_match_char ('%') == MATCH_YES) |
1919 | { | |
1920 | gfc_error ("Symbol '%s' at %C has no IMPLICIT type", sym->name); | |
1921 | return MATCH_ERROR; | |
1922 | } | |
1923 | else if ((sym->ts.type != BT_DERIVED && sym->ts.type != BT_CLASS) | |
1924 | && gfc_match_char ('%') == MATCH_YES) | |
1925 | { | |
1926 | gfc_error ("Unexpected '%%' for nonderived-type variable '%s' at %C", | |
9f507235 | 1927 | sym->name); |
6ee65df3 TB |
1928 | return MATCH_ERROR; |
1929 | } | |
1930 | ||
cf2b3c22 TB |
1931 | if ((sym->ts.type != BT_DERIVED && sym->ts.type != BT_CLASS) |
1932 | || gfc_match_char ('%') != MATCH_YES) | |
6de9cd9a DN |
1933 | goto check_substring; |
1934 | ||
bc21d315 | 1935 | sym = sym->ts.u.derived; |
6de9cd9a DN |
1936 | |
1937 | for (;;) | |
1938 | { | |
8e1f752a | 1939 | gfc_try t; |
e157f736 | 1940 | gfc_symtree *tbp; |
8e1f752a | 1941 | |
6de9cd9a DN |
1942 | m = gfc_match_name (name); |
1943 | if (m == MATCH_NO) | |
1944 | gfc_error ("Expected structure component name at %C"); | |
1945 | if (m != MATCH_YES) | |
1946 | return MATCH_ERROR; | |
1947 | ||
b2acf594 PT |
1948 | if (sym->f2k_derived) |
1949 | tbp = gfc_find_typebound_proc (sym, &t, name, false, &gfc_current_locus); | |
1950 | else | |
1951 | tbp = NULL; | |
1952 | ||
8e1f752a DK |
1953 | if (tbp) |
1954 | { | |
1955 | gfc_symbol* tbp_sym; | |
1956 | ||
1957 | if (t == FAILURE) | |
1958 | return MATCH_ERROR; | |
1959 | ||
1960 | gcc_assert (!tail || !tail->next); | |
4618de23 TB |
1961 | gcc_assert (primary->expr_type == EXPR_VARIABLE |
1962 | || (primary->expr_type == EXPR_STRUCTURE | |
1963 | && primary->symtree && primary->symtree->n.sym | |
1964 | && primary->symtree->n.sym->attr.flavor)); | |
8e1f752a | 1965 | |
e34ccb4c | 1966 | if (tbp->n.tb->is_generic) |
e157f736 DK |
1967 | tbp_sym = NULL; |
1968 | else | |
e34ccb4c | 1969 | tbp_sym = tbp->n.tb->u.specific->n.sym; |
8e1f752a DK |
1970 | |
1971 | primary->expr_type = EXPR_COMPCALL; | |
e34ccb4c | 1972 | primary->value.compcall.tbp = tbp->n.tb; |
e157f736 | 1973 | primary->value.compcall.name = tbp->name; |
4a44a72d DK |
1974 | primary->value.compcall.ignore_pass = 0; |
1975 | primary->value.compcall.assign = 0; | |
1976 | primary->value.compcall.base_object = NULL; | |
e157f736 DK |
1977 | gcc_assert (primary->symtree->n.sym->attr.referenced); |
1978 | if (tbp_sym) | |
1979 | primary->ts = tbp_sym->ts; | |
049bb74e JW |
1980 | else |
1981 | gfc_clear_ts (&primary->ts); | |
e157f736 | 1982 | |
e34ccb4c | 1983 | m = gfc_match_actual_arglist (tbp->n.tb->subroutine, |
8e1f752a DK |
1984 | &primary->value.compcall.actual); |
1985 | if (m == MATCH_ERROR) | |
1986 | return MATCH_ERROR; | |
1987 | if (m == MATCH_NO) | |
1988 | { | |
1989 | if (sub_flag) | |
1990 | primary->value.compcall.actual = NULL; | |
1991 | else | |
1992 | { | |
1993 | gfc_error ("Expected argument list at %C"); | |
1994 | return MATCH_ERROR; | |
1995 | } | |
1996 | } | |
1997 | ||
8e1f752a DK |
1998 | break; |
1999 | } | |
2000 | ||
9d1210f4 | 2001 | component = gfc_find_component (sym, name, false, false); |
6de9cd9a DN |
2002 | if (component == NULL) |
2003 | return MATCH_ERROR; | |
2004 | ||
2005 | tail = extend_ref (primary, tail); | |
2006 | tail->type = REF_COMPONENT; | |
2007 | ||
2008 | tail->u.c.component = component; | |
2009 | tail->u.c.sym = sym; | |
2010 | ||
2011 | primary->ts = component->ts; | |
2012 | ||
a4a76e52 | 2013 | if (component->attr.proc_pointer && ppc_arg) |
713485cc | 2014 | { |
837c4b78 | 2015 | /* Procedure pointer component call: Look for argument list. */ |
23878536 | 2016 | m = gfc_match_actual_arglist (sub_flag, |
713485cc JW |
2017 | &primary->value.compcall.actual); |
2018 | if (m == MATCH_ERROR) | |
2019 | return MATCH_ERROR; | |
837c4b78 JW |
2020 | |
2021 | if (m == MATCH_NO && !gfc_matching_ptr_assignment | |
a4a76e52 | 2022 | && !gfc_matching_procptr_assignment && !matching_actual_arglist) |
837c4b78 JW |
2023 | { |
2024 | gfc_error ("Procedure pointer component '%s' requires an " | |
2025 | "argument list at %C", component->name); | |
2026 | return MATCH_ERROR; | |
2027 | } | |
2028 | ||
23878536 JW |
2029 | if (m == MATCH_YES) |
2030 | primary->expr_type = EXPR_PPC; | |
713485cc JW |
2031 | |
2032 | break; | |
2033 | } | |
2034 | ||
c74b74a8 | 2035 | if (component->as != NULL && !component->attr.proc_pointer) |
6de9cd9a DN |
2036 | { |
2037 | tail = extend_ref (primary, tail); | |
2038 | tail->type = REF_ARRAY; | |
2039 | ||
d3a9eea2 TB |
2040 | m = gfc_match_array_ref (&tail->u.ar, component->as, equiv_flag, |
2041 | component->as->corank); | |
6de9cd9a DN |
2042 | if (m != MATCH_YES) |
2043 | return m; | |
2044 | } | |
cf2b3c22 | 2045 | else if (component->ts.type == BT_CLASS |
7a08eda1 | 2046 | && CLASS_DATA (component)->as != NULL |
cf2b3c22 TB |
2047 | && !component->attr.proc_pointer) |
2048 | { | |
2049 | tail = extend_ref (primary, tail); | |
2050 | tail->type = REF_ARRAY; | |
6de9cd9a | 2051 | |
7a08eda1 | 2052 | m = gfc_match_array_ref (&tail->u.ar, CLASS_DATA (component)->as, |
d3a9eea2 | 2053 | equiv_flag, |
7a08eda1 | 2054 | CLASS_DATA (component)->as->corank); |
cf2b3c22 TB |
2055 | if (m != MATCH_YES) |
2056 | return m; | |
2057 | } | |
2058 | ||
2059 | if ((component->ts.type != BT_DERIVED && component->ts.type != BT_CLASS) | |
6de9cd9a DN |
2060 | || gfc_match_char ('%') != MATCH_YES) |
2061 | break; | |
2062 | ||
bc21d315 | 2063 | sym = component->ts.u.derived; |
6de9cd9a DN |
2064 | } |
2065 | ||
2066 | check_substring: | |
f2d3cb25 | 2067 | unknown = false; |
cf2b3c22 | 2068 | if (primary->ts.type == BT_UNKNOWN && sym->attr.flavor != FL_DERIVED) |
c040ffff | 2069 | { |
713485cc | 2070 | if (gfc_get_default_type (sym->name, sym->ns)->type == BT_CHARACTER) |
c040ffff | 2071 | { |
edf1eac2 SK |
2072 | gfc_set_default_type (sym, 0, sym->ns); |
2073 | primary->ts = sym->ts; | |
f2d3cb25 | 2074 | unknown = true; |
c040ffff TS |
2075 | } |
2076 | } | |
2077 | ||
6de9cd9a DN |
2078 | if (primary->ts.type == BT_CHARACTER) |
2079 | { | |
bc21d315 | 2080 | switch (match_substring (primary->ts.u.cl, equiv_flag, &substring)) |
6de9cd9a DN |
2081 | { |
2082 | case MATCH_YES: | |
2083 | if (tail == NULL) | |
2084 | primary->ref = substring; | |
2085 | else | |
2086 | tail->next = substring; | |
2087 | ||
2088 | if (primary->expr_type == EXPR_CONSTANT) | |
2089 | primary->expr_type = EXPR_SUBSTRING; | |
2090 | ||
860c8f3b | 2091 | if (substring) |
bc21d315 | 2092 | primary->ts.u.cl = NULL; |
860c8f3b | 2093 | |
6de9cd9a DN |
2094 | break; |
2095 | ||
2096 | case MATCH_NO: | |
f2d3cb25 | 2097 | if (unknown) |
858f1fa2 DK |
2098 | { |
2099 | gfc_clear_ts (&primary->ts); | |
2100 | gfc_clear_ts (&sym->ts); | |
2101 | } | |
6de9cd9a DN |
2102 | break; |
2103 | ||
2104 | case MATCH_ERROR: | |
2105 | return MATCH_ERROR; | |
2106 | } | |
2107 | } | |
2108 | ||
d3a9eea2 TB |
2109 | /* F2008, C727. */ |
2110 | if (primary->expr_type == EXPR_PPC && gfc_is_coindexed (primary)) | |
2111 | { | |
2112 | gfc_error ("Coindexed procedure-pointer component at %C"); | |
2113 | return MATCH_ERROR; | |
2114 | } | |
2115 | ||
6de9cd9a DN |
2116 | return MATCH_YES; |
2117 | } | |
2118 | ||
2119 | ||
2120 | /* Given an expression that is a variable, figure out what the | |
2121 | ultimate variable's type and attribute is, traversing the reference | |
2122 | structures if necessary. | |
2123 | ||
2124 | This subroutine is trickier than it looks. We start at the base | |
2125 | symbol and store the attribute. Component references load a | |
2126 | completely new attribute. | |
2127 | ||
2128 | A couple of rules come into play. Subobjects of targets are always | |
2129 | targets themselves. If we see a component that goes through a | |
2130 | pointer, then the expression must also be a target, since the | |
2131 | pointer is associated with something (if it isn't core will soon be | |
2132 | dumped). If we see a full part or section of an array, the | |
2133 | expression is also an array. | |
2134 | ||
f7b529fa | 2135 | We can have at most one full array reference. */ |
6de9cd9a DN |
2136 | |
2137 | symbol_attribute | |
edf1eac2 | 2138 | gfc_variable_attr (gfc_expr *expr, gfc_typespec *ts) |
6de9cd9a | 2139 | { |
5046aff5 | 2140 | int dimension, pointer, allocatable, target; |
6de9cd9a DN |
2141 | symbol_attribute attr; |
2142 | gfc_ref *ref; | |
cf2b3c22 TB |
2143 | gfc_symbol *sym; |
2144 | gfc_component *comp; | |
6de9cd9a | 2145 | |
50dbf0b4 | 2146 | if (expr->expr_type != EXPR_VARIABLE && expr->expr_type != EXPR_FUNCTION) |
6de9cd9a DN |
2147 | gfc_internal_error ("gfc_variable_attr(): Expression isn't a variable"); |
2148 | ||
cf2b3c22 TB |
2149 | sym = expr->symtree->n.sym; |
2150 | attr = sym->attr; | |
6de9cd9a | 2151 | |
528622fd | 2152 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok) |
cf2b3c22 | 2153 | { |
7a08eda1 | 2154 | dimension = CLASS_DATA (sym)->attr.dimension; |
d40477b4 | 2155 | pointer = CLASS_DATA (sym)->attr.class_pointer; |
7a08eda1 | 2156 | allocatable = CLASS_DATA (sym)->attr.allocatable; |
cf2b3c22 TB |
2157 | } |
2158 | else | |
2159 | { | |
2160 | dimension = attr.dimension; | |
2161 | pointer = attr.pointer; | |
2162 | allocatable = attr.allocatable; | |
2163 | } | |
6de9cd9a DN |
2164 | |
2165 | target = attr.target; | |
713485cc | 2166 | if (pointer || attr.proc_pointer) |
6de9cd9a DN |
2167 | target = 1; |
2168 | ||
2169 | if (ts != NULL && expr->ts.type == BT_UNKNOWN) | |
cf2b3c22 | 2170 | *ts = sym->ts; |
6de9cd9a | 2171 | |
8c91ab34 | 2172 | for (ref = expr->ref; ref; ref = ref->next) |
6de9cd9a DN |
2173 | switch (ref->type) |
2174 | { | |
2175 | case REF_ARRAY: | |
2176 | ||
2177 | switch (ref->u.ar.type) | |
2178 | { | |
2179 | case AR_FULL: | |
2180 | dimension = 1; | |
2181 | break; | |
2182 | ||
2183 | case AR_SECTION: | |
5046aff5 | 2184 | allocatable = pointer = 0; |
6de9cd9a DN |
2185 | dimension = 1; |
2186 | break; | |
2187 | ||
2188 | case AR_ELEMENT: | |
d3a9eea2 TB |
2189 | /* Handle coarrays. */ |
2190 | if (ref->u.ar.dimen > 0) | |
2191 | allocatable = pointer = 0; | |
6de9cd9a DN |
2192 | break; |
2193 | ||
2194 | case AR_UNKNOWN: | |
2195 | gfc_internal_error ("gfc_variable_attr(): Bad array reference"); | |
2196 | } | |
2197 | ||
2198 | break; | |
2199 | ||
2200 | case REF_COMPONENT: | |
cf2b3c22 TB |
2201 | comp = ref->u.c.component; |
2202 | attr = comp->attr; | |
6de9cd9a | 2203 | if (ts != NULL) |
e8a25349 | 2204 | { |
cf2b3c22 | 2205 | *ts = comp->ts; |
e8a25349 TS |
2206 | /* Don't set the string length if a substring reference |
2207 | follows. */ | |
2208 | if (ts->type == BT_CHARACTER | |
2209 | && ref->next && ref->next->type == REF_SUBSTRING) | |
bc21d315 | 2210 | ts->u.cl = NULL; |
e8a25349 | 2211 | } |
6de9cd9a | 2212 | |
cf2b3c22 TB |
2213 | if (comp->ts.type == BT_CLASS) |
2214 | { | |
d40477b4 | 2215 | pointer = CLASS_DATA (comp)->attr.class_pointer; |
7a08eda1 | 2216 | allocatable = CLASS_DATA (comp)->attr.allocatable; |
cf2b3c22 TB |
2217 | } |
2218 | else | |
2219 | { | |
2220 | pointer = comp->attr.pointer; | |
2221 | allocatable = comp->attr.allocatable; | |
2222 | } | |
713485cc | 2223 | if (pointer || attr.proc_pointer) |
6de9cd9a DN |
2224 | target = 1; |
2225 | ||
2226 | break; | |
2227 | ||
2228 | case REF_SUBSTRING: | |
5046aff5 | 2229 | allocatable = pointer = 0; |
6de9cd9a DN |
2230 | break; |
2231 | } | |
2232 | ||
2233 | attr.dimension = dimension; | |
2234 | attr.pointer = pointer; | |
5046aff5 | 2235 | attr.allocatable = allocatable; |
6de9cd9a | 2236 | attr.target = target; |
80f95228 | 2237 | attr.save = sym->attr.save; |
6de9cd9a DN |
2238 | |
2239 | return attr; | |
2240 | } | |
2241 | ||
2242 | ||
2243 | /* Return the attribute from a general expression. */ | |
2244 | ||
2245 | symbol_attribute | |
edf1eac2 | 2246 | gfc_expr_attr (gfc_expr *e) |
6de9cd9a DN |
2247 | { |
2248 | symbol_attribute attr; | |
2249 | ||
2250 | switch (e->expr_type) | |
2251 | { | |
2252 | case EXPR_VARIABLE: | |
2253 | attr = gfc_variable_attr (e, NULL); | |
2254 | break; | |
2255 | ||
2256 | case EXPR_FUNCTION: | |
2257 | gfc_clear_attr (&attr); | |
2258 | ||
2259 | if (e->value.function.esym != NULL) | |
cf2b3c22 TB |
2260 | { |
2261 | gfc_symbol *sym = e->value.function.esym->result; | |
2262 | attr = sym->attr; | |
2263 | if (sym->ts.type == BT_CLASS) | |
2264 | { | |
7a08eda1 | 2265 | attr.dimension = CLASS_DATA (sym)->attr.dimension; |
d40477b4 | 2266 | attr.pointer = CLASS_DATA (sym)->attr.class_pointer; |
7a08eda1 | 2267 | attr.allocatable = CLASS_DATA (sym)->attr.allocatable; |
cf2b3c22 TB |
2268 | } |
2269 | } | |
50dbf0b4 JW |
2270 | else |
2271 | attr = gfc_variable_attr (e, NULL); | |
6de9cd9a DN |
2272 | |
2273 | /* TODO: NULL() returns pointers. May have to take care of this | |
edf1eac2 | 2274 | here. */ |
6de9cd9a DN |
2275 | |
2276 | break; | |
2277 | ||
2278 | default: | |
2279 | gfc_clear_attr (&attr); | |
2280 | break; | |
2281 | } | |
2282 | ||
2283 | return attr; | |
2284 | } | |
2285 | ||
2286 | ||
2287 | /* Match a structure constructor. The initial symbol has already been | |
2288 | seen. */ | |
2289 | ||
fa9290d3 DK |
2290 | typedef struct gfc_structure_ctor_component |
2291 | { | |
2292 | char* name; | |
2293 | gfc_expr* val; | |
2294 | locus where; | |
2295 | struct gfc_structure_ctor_component* next; | |
2296 | } | |
2297 | gfc_structure_ctor_component; | |
2298 | ||
ece3f663 | 2299 | #define gfc_get_structure_ctor_component() XCNEW (gfc_structure_ctor_component) |
fa9290d3 DK |
2300 | |
2301 | static void | |
2302 | gfc_free_structure_ctor_component (gfc_structure_ctor_component *comp) | |
2303 | { | |
cede9502 | 2304 | free (comp->name); |
fa9290d3 | 2305 | gfc_free_expr (comp->val); |
cede9502 | 2306 | free (comp); |
fa9290d3 DK |
2307 | } |
2308 | ||
7d1f1e61 PT |
2309 | |
2310 | /* Translate the component list into the actual constructor by sorting it in | |
2311 | the order required; this also checks along the way that each and every | |
2312 | component actually has an initializer and handles default initializers | |
2313 | for components without explicit value given. */ | |
2314 | static gfc_try | |
2315 | build_actual_constructor (gfc_structure_ctor_component **comp_head, | |
b7e75771 | 2316 | gfc_constructor_base *ctor_head, gfc_symbol *sym) |
6de9cd9a | 2317 | { |
fa9290d3 | 2318 | gfc_structure_ctor_component *comp_iter; |
7d1f1e61 PT |
2319 | gfc_component *comp; |
2320 | ||
2321 | for (comp = sym->components; comp; comp = comp->next) | |
2322 | { | |
2323 | gfc_structure_ctor_component **next_ptr; | |
2324 | gfc_expr *value = NULL; | |
2325 | ||
2326 | /* Try to find the initializer for the current component by name. */ | |
2327 | next_ptr = comp_head; | |
2328 | for (comp_iter = *comp_head; comp_iter; comp_iter = comp_iter->next) | |
2329 | { | |
2330 | if (!strcmp (comp_iter->name, comp->name)) | |
2331 | break; | |
2332 | next_ptr = &comp_iter->next; | |
2333 | } | |
2334 | ||
2335 | /* If an extension, try building the parent derived type by building | |
2336 | a value expression for the parent derived type and calling self. */ | |
2337 | if (!comp_iter && comp == sym->components && sym->attr.extension) | |
2338 | { | |
b7e75771 JD |
2339 | value = gfc_get_structure_constructor_expr (comp->ts.type, |
2340 | comp->ts.kind, | |
2341 | &gfc_current_locus); | |
7d1f1e61 | 2342 | value->ts = comp->ts; |
7d1f1e61 PT |
2343 | |
2344 | if (build_actual_constructor (comp_head, &value->value.constructor, | |
bc21d315 | 2345 | comp->ts.u.derived) == FAILURE) |
7d1f1e61 PT |
2346 | { |
2347 | gfc_free_expr (value); | |
2348 | return FAILURE; | |
2349 | } | |
b7e75771 JD |
2350 | |
2351 | gfc_constructor_append_expr (ctor_head, value, NULL); | |
7d1f1e61 PT |
2352 | continue; |
2353 | } | |
2354 | ||
2355 | /* If it was not found, try the default initializer if there's any; | |
2356 | otherwise, it's an error. */ | |
2357 | if (!comp_iter) | |
2358 | { | |
2359 | if (comp->initializer) | |
2360 | { | |
9717f7a1 | 2361 | if (gfc_notify_std (GFC_STD_F2003, "Structure" |
7d1f1e61 PT |
2362 | " constructor with missing optional arguments" |
2363 | " at %C") == FAILURE) | |
2364 | return FAILURE; | |
2365 | value = gfc_copy_expr (comp->initializer); | |
2366 | } | |
2367 | else | |
2368 | { | |
2369 | gfc_error ("No initializer for component '%s' given in the" | |
2370 | " structure constructor at %C!", comp->name); | |
2371 | return FAILURE; | |
2372 | } | |
2373 | } | |
2374 | else | |
2375 | value = comp_iter->val; | |
2376 | ||
2377 | /* Add the value to the constructor chain built. */ | |
b7e75771 | 2378 | gfc_constructor_append_expr (ctor_head, value, NULL); |
7d1f1e61 PT |
2379 | |
2380 | /* Remove the entry from the component list. We don't want the expression | |
2381 | value to be free'd, so set it to NULL. */ | |
2382 | if (comp_iter) | |
2383 | { | |
2384 | *next_ptr = comp_iter->next; | |
2385 | comp_iter->val = NULL; | |
2386 | gfc_free_structure_ctor_component (comp_iter); | |
2387 | } | |
2388 | } | |
2389 | return SUCCESS; | |
2390 | } | |
2391 | ||
c3f34952 TB |
2392 | |
2393 | gfc_try | |
2394 | gfc_convert_to_structure_constructor (gfc_expr *e, gfc_symbol *sym, gfc_expr **cexpr, | |
2395 | gfc_actual_arglist **arglist, | |
2396 | bool parent) | |
7d1f1e61 | 2397 | { |
c3f34952 | 2398 | gfc_actual_arglist *actual; |
7d1f1e61 | 2399 | gfc_structure_ctor_component *comp_tail, *comp_head, *comp_iter; |
b7e75771 | 2400 | gfc_constructor_base ctor_head = NULL; |
fa9290d3 | 2401 | gfc_component *comp; /* Is set NULL when named component is first seen */ |
fa9290d3 | 2402 | const char* last_name = NULL; |
c3f34952 TB |
2403 | locus old_locus; |
2404 | gfc_expr *expr; | |
6de9cd9a | 2405 | |
c3f34952 TB |
2406 | expr = parent ? *cexpr : e; |
2407 | old_locus = gfc_current_locus; | |
2408 | if (parent) | |
2409 | ; /* gfc_current_locus = *arglist->expr ? ->where;*/ | |
2410 | else | |
2411 | gfc_current_locus = expr->where; | |
6de9cd9a | 2412 | |
c3f34952 | 2413 | comp_tail = comp_head = NULL; |
6de9cd9a | 2414 | |
52f49934 DK |
2415 | if (!parent && sym->attr.abstract) |
2416 | { | |
c3f34952 TB |
2417 | gfc_error ("Can't construct ABSTRACT type '%s' at %L", |
2418 | sym->name, &expr->where); | |
2419 | goto cleanup; | |
52f49934 DK |
2420 | } |
2421 | ||
c3f34952 TB |
2422 | comp = sym->components; |
2423 | actual = parent ? *arglist : expr->value.function.actual; | |
2424 | for ( ; actual; ) | |
6de9cd9a | 2425 | { |
c3f34952 | 2426 | gfc_component *this_comp = NULL; |
6de9cd9a | 2427 | |
c3f34952 TB |
2428 | if (!comp_head) |
2429 | comp_tail = comp_head = gfc_get_structure_ctor_component (); | |
2430 | else | |
2431 | { | |
2432 | comp_tail->next = gfc_get_structure_ctor_component (); | |
2433 | comp_tail = comp_tail->next; | |
2434 | } | |
2435 | if (actual->name) | |
2436 | { | |
9717f7a1 | 2437 | if (gfc_notify_std (GFC_STD_F2003, "Structure" |
c3f34952 TB |
2438 | " constructor with named arguments at %C") |
2439 | == FAILURE) | |
2440 | goto cleanup; | |
6de9cd9a | 2441 | |
c3f34952 TB |
2442 | comp_tail->name = xstrdup (actual->name); |
2443 | last_name = comp_tail->name; | |
2444 | comp = NULL; | |
2445 | } | |
2446 | else | |
2447 | { | |
2448 | /* Components without name are not allowed after the first named | |
2449 | component initializer! */ | |
2450 | if (!comp) | |
fa9290d3 | 2451 | { |
c3f34952 TB |
2452 | if (last_name) |
2453 | gfc_error ("Component initializer without name after component" | |
2454 | " named %s at %L!", last_name, | |
2455 | actual->expr ? &actual->expr->where | |
2456 | : &gfc_current_locus); | |
2457 | else | |
2458 | gfc_error ("Too many components in structure constructor at " | |
2459 | "%L!", actual->expr ? &actual->expr->where | |
2460 | : &gfc_current_locus); | |
2461 | goto cleanup; | |
fa9290d3 | 2462 | } |
fa9290d3 | 2463 | |
c3f34952 TB |
2464 | comp_tail->name = xstrdup (comp->name); |
2465 | } | |
fa9290d3 | 2466 | |
c3f34952 | 2467 | /* Find the current component in the structure definition and check |
9d1210f4 | 2468 | its access is not private. */ |
c3f34952 TB |
2469 | if (comp) |
2470 | this_comp = gfc_find_component (sym, comp->name, false, false); | |
2471 | else | |
2472 | { | |
2473 | this_comp = gfc_find_component (sym, (const char *)comp_tail->name, | |
2474 | false, false); | |
2475 | comp = NULL; /* Reset needed! */ | |
2476 | } | |
6de9cd9a | 2477 | |
c3f34952 TB |
2478 | /* Here we can check if a component name is given which does not |
2479 | correspond to any component of the defined structure. */ | |
2480 | if (!this_comp) | |
2481 | goto cleanup; | |
fa9290d3 | 2482 | |
c3f34952 TB |
2483 | comp_tail->val = actual->expr; |
2484 | if (actual->expr != NULL) | |
2485 | comp_tail->where = actual->expr->where; | |
2486 | actual->expr = NULL; | |
fa9290d3 | 2487 | |
c3f34952 TB |
2488 | /* Check if this component is already given a value. */ |
2489 | for (comp_iter = comp_head; comp_iter != comp_tail; | |
2490 | comp_iter = comp_iter->next) | |
2491 | { | |
2492 | gcc_assert (comp_iter); | |
2493 | if (!strcmp (comp_iter->name, comp_tail->name)) | |
d3a9eea2 | 2494 | { |
c3f34952 TB |
2495 | gfc_error ("Component '%s' is initialized twice in the structure" |
2496 | " constructor at %L!", comp_tail->name, | |
2497 | comp_tail->val ? &comp_tail->where | |
2498 | : &gfc_current_locus); | |
d3a9eea2 | 2499 | goto cleanup; |
c3f34952 TB |
2500 | } |
2501 | } | |
d3a9eea2 | 2502 | |
c3f34952 TB |
2503 | /* F2008, R457/C725, for PURE C1283. */ |
2504 | if (this_comp->attr.pointer && comp_tail->val | |
2505 | && gfc_is_coindexed (comp_tail->val)) | |
2506 | { | |
2507 | gfc_error ("Coindexed expression to pointer component '%s' in " | |
2508 | "structure constructor at %L!", comp_tail->name, | |
2509 | &comp_tail->where); | |
2510 | goto cleanup; | |
2511 | } | |
d3a9eea2 | 2512 | |
c3f34952 TB |
2513 | /* If not explicitly a parent constructor, gather up the components |
2514 | and build one. */ | |
2515 | if (comp && comp == sym->components | |
2516 | && sym->attr.extension | |
2517 | && comp_tail->val | |
2518 | && (comp_tail->val->ts.type != BT_DERIVED | |
2519 | || | |
2520 | comp_tail->val->ts.u.derived != this_comp->ts.u.derived)) | |
2521 | { | |
2522 | gfc_try m; | |
2523 | gfc_actual_arglist *arg_null = NULL; | |
6de9cd9a | 2524 | |
c3f34952 TB |
2525 | actual->expr = comp_tail->val; |
2526 | comp_tail->val = NULL; | |
6de9cd9a | 2527 | |
c3f34952 TB |
2528 | m = gfc_convert_to_structure_constructor (NULL, |
2529 | comp->ts.u.derived, &comp_tail->val, | |
2530 | comp->ts.u.derived->attr.zero_comp | |
2531 | ? &arg_null : &actual, true); | |
2532 | if (m == FAILURE) | |
2533 | goto cleanup; | |
2eae3dc7 | 2534 | |
c3f34952 TB |
2535 | if (comp->ts.u.derived->attr.zero_comp) |
2536 | { | |
2537 | comp = comp->next; | |
2538 | continue; | |
2539 | } | |
2540 | } | |
fa9290d3 | 2541 | |
c3f34952 TB |
2542 | if (comp) |
2543 | comp = comp->next; | |
2544 | if (parent && !comp) | |
2545 | break; | |
fa9290d3 | 2546 | |
c3f34952 | 2547 | actual = actual->next; |
6de9cd9a DN |
2548 | } |
2549 | ||
7d1f1e61 PT |
2550 | if (build_actual_constructor (&comp_head, &ctor_head, sym) == FAILURE) |
2551 | goto cleanup; | |
2552 | ||
fa9290d3 DK |
2553 | /* No component should be left, as this should have caused an error in the |
2554 | loop constructing the component-list (name that does not correspond to any | |
2555 | component in the structure definition). */ | |
c3f34952 | 2556 | if (comp_head && sym->attr.extension) |
7d1f1e61 PT |
2557 | { |
2558 | for (comp_iter = comp_head; comp_iter; comp_iter = comp_iter->next) | |
2559 | { | |
2560 | gfc_error ("component '%s' at %L has already been set by a " | |
2561 | "parent derived type constructor", comp_iter->name, | |
2562 | &comp_iter->where); | |
2563 | } | |
2564 | goto cleanup; | |
2565 | } | |
c3f34952 TB |
2566 | else |
2567 | gcc_assert (!comp_head); | |
fa9290d3 | 2568 | |
c3f34952 TB |
2569 | if (parent) |
2570 | { | |
2571 | expr = gfc_get_structure_constructor_expr (BT_DERIVED, 0, &gfc_current_locus); | |
2572 | expr->ts.u.derived = sym; | |
2573 | expr->value.constructor = ctor_head; | |
2574 | *cexpr = expr; | |
2575 | } | |
2576 | else | |
2577 | { | |
2578 | expr->ts.u.derived = sym; | |
2579 | expr->ts.kind = 0; | |
2580 | expr->ts.type = BT_DERIVED; | |
2581 | expr->value.constructor = ctor_head; | |
2582 | expr->expr_type = EXPR_STRUCTURE; | |
2583 | } | |
6de9cd9a | 2584 | |
c3f34952 TB |
2585 | gfc_current_locus = old_locus; |
2586 | if (parent) | |
2587 | *arglist = actual; | |
2588 | return SUCCESS; | |
6de9cd9a | 2589 | |
c3f34952 TB |
2590 | cleanup: |
2591 | gfc_current_locus = old_locus; | |
6de9cd9a | 2592 | |
fa9290d3 DK |
2593 | for (comp_iter = comp_head; comp_iter; ) |
2594 | { | |
2595 | gfc_structure_ctor_component *next = comp_iter->next; | |
2596 | gfc_free_structure_ctor_component (comp_iter); | |
2597 | comp_iter = next; | |
2598 | } | |
b7e75771 | 2599 | gfc_constructor_free (ctor_head); |
c3f34952 TB |
2600 | |
2601 | return FAILURE; | |
2602 | } | |
2603 | ||
2604 | ||
2605 | match | |
2606 | gfc_match_structure_constructor (gfc_symbol *sym, gfc_expr **result) | |
2607 | { | |
2608 | match m; | |
2609 | gfc_expr *e; | |
2610 | gfc_symtree *symtree; | |
2611 | ||
2612 | gfc_get_sym_tree (sym->name, NULL, &symtree, false); /* Can't fail */ | |
2613 | ||
2614 | e = gfc_get_expr (); | |
2615 | e->symtree = symtree; | |
2616 | e->expr_type = EXPR_FUNCTION; | |
2617 | ||
2618 | gcc_assert (sym->attr.flavor == FL_DERIVED | |
2619 | && symtree->n.sym->attr.flavor == FL_PROCEDURE); | |
2620 | e->value.function.esym = sym; | |
2621 | e->symtree->n.sym->attr.generic = 1; | |
2622 | ||
2623 | m = gfc_match_actual_arglist (0, &e->value.function.actual); | |
2624 | if (m != MATCH_YES) | |
2625 | { | |
2626 | gfc_free_expr (e); | |
2627 | return m; | |
2628 | } | |
2629 | ||
2630 | if (gfc_convert_to_structure_constructor (e, sym, NULL, NULL, false) | |
2631 | != SUCCESS) | |
2632 | { | |
2633 | gfc_free_expr (e); | |
2634 | return MATCH_ERROR; | |
2635 | } | |
2636 | ||
2637 | *result = e; | |
2638 | return MATCH_YES; | |
6de9cd9a DN |
2639 | } |
2640 | ||
2641 | ||
9a3db5a3 PT |
2642 | /* If the symbol is an implicit do loop index and implicitly typed, |
2643 | it should not be host associated. Provide a symtree from the | |
2644 | current namespace. */ | |
2645 | static match | |
2646 | check_for_implicit_index (gfc_symtree **st, gfc_symbol **sym) | |
2647 | { | |
2648 | if ((*sym)->attr.flavor == FL_VARIABLE | |
2649 | && (*sym)->ns != gfc_current_ns | |
2650 | && (*sym)->attr.implied_index | |
2651 | && (*sym)->attr.implicit_type | |
2652 | && !(*sym)->attr.use_assoc) | |
2653 | { | |
2654 | int i; | |
08a6b8e0 | 2655 | i = gfc_get_sym_tree ((*sym)->name, NULL, st, false); |
9a3db5a3 PT |
2656 | if (i) |
2657 | return MATCH_ERROR; | |
2658 | *sym = (*st)->n.sym; | |
2659 | } | |
2660 | return MATCH_YES; | |
2661 | } | |
2662 | ||
2663 | ||
3070bab4 JW |
2664 | /* Procedure pointer as function result: Replace the function symbol by the |
2665 | auto-generated hidden result variable named "ppr@". */ | |
2666 | ||
2667 | static gfc_try | |
2668 | replace_hidden_procptr_result (gfc_symbol **sym, gfc_symtree **st) | |
2669 | { | |
2670 | /* Check for procedure pointer result variable. */ | |
2671 | if ((*sym)->attr.function && !(*sym)->attr.external | |
2672 | && (*sym)->result && (*sym)->result != *sym | |
2673 | && (*sym)->result->attr.proc_pointer | |
2674 | && (*sym) == gfc_current_ns->proc_name | |
2675 | && (*sym) == (*sym)->result->ns->proc_name | |
2676 | && strcmp ("ppr@", (*sym)->result->name) == 0) | |
2677 | { | |
2678 | /* Automatic replacement with "hidden" result variable. */ | |
2679 | (*sym)->result->attr.referenced = (*sym)->attr.referenced; | |
2680 | *sym = (*sym)->result; | |
2681 | *st = gfc_find_symtree ((*sym)->ns->sym_root, (*sym)->name); | |
2682 | return SUCCESS; | |
2683 | } | |
2684 | return FAILURE; | |
2685 | } | |
2686 | ||
2687 | ||
6de9cd9a DN |
2688 | /* Matches a variable name followed by anything that might follow it-- |
2689 | array reference, argument list of a function, etc. */ | |
2690 | ||
2691 | match | |
edf1eac2 | 2692 | gfc_match_rvalue (gfc_expr **result) |
6de9cd9a DN |
2693 | { |
2694 | gfc_actual_arglist *actual_arglist; | |
d3fcc995 | 2695 | char name[GFC_MAX_SYMBOL_LEN + 1], argname[GFC_MAX_SYMBOL_LEN + 1]; |
6de9cd9a DN |
2696 | gfc_state_data *st; |
2697 | gfc_symbol *sym; | |
2698 | gfc_symtree *symtree; | |
d3fcc995 | 2699 | locus where, old_loc; |
6de9cd9a | 2700 | gfc_expr *e; |
d3fcc995 | 2701 | match m, m2; |
6de9cd9a | 2702 | int i; |
5270c302 AL |
2703 | gfc_typespec *ts; |
2704 | bool implicit_char; | |
a99288e5 | 2705 | gfc_ref *ref; |
6de9cd9a DN |
2706 | |
2707 | m = gfc_match_name (name); | |
2708 | if (m != MATCH_YES) | |
2709 | return m; | |
2710 | ||
2a6dcee5 TB |
2711 | if (gfc_find_state (COMP_INTERFACE) == SUCCESS |
2712 | && !gfc_current_ns->has_import_set) | |
08a6b8e0 | 2713 | i = gfc_get_sym_tree (name, NULL, &symtree, false); |
6de9cd9a DN |
2714 | else |
2715 | i = gfc_get_ha_sym_tree (name, &symtree); | |
2716 | ||
2717 | if (i) | |
2718 | return MATCH_ERROR; | |
2719 | ||
2720 | sym = symtree->n.sym; | |
2721 | e = NULL; | |
63645982 | 2722 | where = gfc_current_locus; |
6de9cd9a | 2723 | |
3070bab4 JW |
2724 | replace_hidden_procptr_result (&sym, &symtree); |
2725 | ||
9a3db5a3 PT |
2726 | /* If this is an implicit do loop index and implicitly typed, |
2727 | it should not be host associated. */ | |
2728 | m = check_for_implicit_index (&symtree, &sym); | |
2729 | if (m != MATCH_YES) | |
2730 | return m; | |
2731 | ||
6de9cd9a | 2732 | gfc_set_sym_referenced (sym); |
9a3db5a3 | 2733 | sym->attr.implied_index = 0; |
6de9cd9a | 2734 | |
0921bc44 JJ |
2735 | if (sym->attr.function && sym->result == sym) |
2736 | { | |
811849c0 PT |
2737 | /* See if this is a directly recursive function call. */ |
2738 | gfc_gobble_whitespace (); | |
2739 | if (sym->attr.recursive | |
8fc541d3 | 2740 | && gfc_peek_ascii_char () == '(' |
fc2d8680 PT |
2741 | && gfc_current_ns->proc_name == sym |
2742 | && !sym->attr.dimension) | |
811849c0 | 2743 | { |
fc2d8680 PT |
2744 | gfc_error ("'%s' at %C is the name of a recursive function " |
2745 | "and so refers to the result variable. Use an " | |
2746 | "explicit RESULT variable for direct recursion " | |
2747 | "(12.5.2.1)", sym->name); | |
811849c0 PT |
2748 | return MATCH_ERROR; |
2749 | } | |
fc2d8680 | 2750 | |
2d71b918 | 2751 | if (gfc_is_function_return_value (sym, gfc_current_ns)) |
0921bc44 JJ |
2752 | goto variable; |
2753 | ||
2754 | if (sym->attr.entry | |
2755 | && (sym->ns == gfc_current_ns | |
2756 | || sym->ns == gfc_current_ns->parent)) | |
2757 | { | |
2758 | gfc_entry_list *el = NULL; | |
2759 | ||
2760 | for (el = sym->ns->entries; el; el = el->next) | |
2761 | if (sym == el->sym) | |
2762 | goto variable; | |
2763 | } | |
2764 | } | |
6de9cd9a | 2765 | |
8fb74da4 JW |
2766 | if (gfc_matching_procptr_assignment) |
2767 | goto procptr0; | |
2768 | ||
6de9cd9a DN |
2769 | if (sym->attr.function || sym->attr.external || sym->attr.intrinsic) |
2770 | goto function0; | |
2771 | ||
2772 | if (sym->attr.generic) | |
2773 | goto generic_function; | |
2774 | ||
2775 | switch (sym->attr.flavor) | |
2776 | { | |
2777 | case FL_VARIABLE: | |
2778 | variable: | |
6de9cd9a DN |
2779 | e = gfc_get_expr (); |
2780 | ||
2781 | e->expr_type = EXPR_VARIABLE; | |
2782 | e->symtree = symtree; | |
2783 | ||
713485cc | 2784 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
2785 | break; |
2786 | ||
2787 | case FL_PARAMETER: | |
b7263e8f EE |
2788 | /* A statement of the form "REAL, parameter :: a(0:10) = 1" will |
2789 | end up here. Unfortunately, sym->value->expr_type is set to | |
2790 | EXPR_CONSTANT, and so the if () branch would be followed without | |
2791 | the !sym->as check. */ | |
2792 | if (sym->value && sym->value->expr_type != EXPR_ARRAY && !sym->as) | |
6de9cd9a DN |
2793 | e = gfc_copy_expr (sym->value); |
2794 | else | |
2795 | { | |
2796 | e = gfc_get_expr (); | |
2797 | e->expr_type = EXPR_VARIABLE; | |
2798 | } | |
2799 | ||
2800 | e->symtree = symtree; | |
713485cc | 2801 | m = gfc_match_varspec (e, 0, false, true); |
a99288e5 PT |
2802 | |
2803 | if (sym->ts.is_c_interop || sym->ts.is_iso_c) | |
2804 | break; | |
2805 | ||
927171bf PT |
2806 | /* Variable array references to derived type parameters cause |
2807 | all sorts of headaches in simplification. Treating such | |
2808 | expressions as variable works just fine for all array | |
2809 | references. */ | |
2810 | if (sym->value && sym->ts.type == BT_DERIVED && e->ref) | |
a99288e5 PT |
2811 | { |
2812 | for (ref = e->ref; ref; ref = ref->next) | |
2813 | if (ref->type == REF_ARRAY) | |
2814 | break; | |
2815 | ||
927171bf | 2816 | if (ref == NULL || ref->u.ar.type == AR_FULL) |
a99288e5 PT |
2817 | break; |
2818 | ||
2819 | ref = e->ref; | |
2820 | e->ref = NULL; | |
2821 | gfc_free_expr (e); | |
2822 | e = gfc_get_expr (); | |
2823 | e->expr_type = EXPR_VARIABLE; | |
2824 | e->symtree = symtree; | |
2825 | e->ref = ref; | |
a99288e5 PT |
2826 | } |
2827 | ||
6de9cd9a DN |
2828 | break; |
2829 | ||
2830 | case FL_DERIVED: | |
2831 | sym = gfc_use_derived (sym); | |
2832 | if (sym == NULL) | |
2833 | m = MATCH_ERROR; | |
2834 | else | |
c3f34952 | 2835 | goto generic_function; |
6de9cd9a DN |
2836 | break; |
2837 | ||
2838 | /* If we're here, then the name is known to be the name of a | |
2839 | procedure, yet it is not sure to be the name of a function. */ | |
2840 | case FL_PROCEDURE: | |
8fb74da4 JW |
2841 | |
2842 | /* Procedure Pointer Assignments. */ | |
2843 | procptr0: | |
2844 | if (gfc_matching_procptr_assignment) | |
2845 | { | |
2846 | gfc_gobble_whitespace (); | |
e35bbb23 | 2847 | if (!sym->attr.dimension && gfc_peek_ascii_char () == '(') |
8fb74da4 JW |
2848 | /* Parse functions returning a procptr. */ |
2849 | goto function0; | |
2850 | ||
8fb74da4 JW |
2851 | e = gfc_get_expr (); |
2852 | e->expr_type = EXPR_VARIABLE; | |
2853 | e->symtree = symtree; | |
713485cc | 2854 | m = gfc_match_varspec (e, 0, false, true); |
2dda89a8 JW |
2855 | if (!e->ref && sym->attr.flavor == FL_UNKNOWN |
2856 | && sym->ts.type == BT_UNKNOWN | |
2857 | && gfc_add_flavor (&sym->attr, FL_PROCEDURE, | |
2858 | sym->name, NULL) == FAILURE) | |
2859 | { | |
2860 | m = MATCH_ERROR; | |
2861 | break; | |
2862 | } | |
8fb74da4 JW |
2863 | break; |
2864 | } | |
2865 | ||
6de9cd9a DN |
2866 | if (sym->attr.subroutine) |
2867 | { | |
2868 | gfc_error ("Unexpected use of subroutine name '%s' at %C", | |
2869 | sym->name); | |
2870 | m = MATCH_ERROR; | |
2871 | break; | |
2872 | } | |
2873 | ||
2874 | /* At this point, the name has to be a non-statement function. | |
edf1eac2 SK |
2875 | If the name is the same as the current function being |
2876 | compiled, then we have a variable reference (to the function | |
2877 | result) if the name is non-recursive. */ | |
6de9cd9a DN |
2878 | |
2879 | st = gfc_enclosing_unit (NULL); | |
2880 | ||
2881 | if (st != NULL && st->state == COMP_FUNCTION | |
2882 | && st->sym == sym | |
2883 | && !sym->attr.recursive) | |
2884 | { | |
2885 | e = gfc_get_expr (); | |
2886 | e->symtree = symtree; | |
2887 | e->expr_type = EXPR_VARIABLE; | |
2888 | ||
713485cc | 2889 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
2890 | break; |
2891 | } | |
2892 | ||
2893 | /* Match a function reference. */ | |
2894 | function0: | |
2895 | m = gfc_match_actual_arglist (0, &actual_arglist); | |
2896 | if (m == MATCH_NO) | |
2897 | { | |
2898 | if (sym->attr.proc == PROC_ST_FUNCTION) | |
2899 | gfc_error ("Statement function '%s' requires argument list at %C", | |
2900 | sym->name); | |
2901 | else | |
2902 | gfc_error ("Function '%s' requires an argument list at %C", | |
2903 | sym->name); | |
2904 | ||
2905 | m = MATCH_ERROR; | |
2906 | break; | |
2907 | } | |
2908 | ||
2909 | if (m != MATCH_YES) | |
2910 | { | |
2911 | m = MATCH_ERROR; | |
2912 | break; | |
2913 | } | |
2914 | ||
2915 | gfc_get_ha_sym_tree (name, &symtree); /* Can't fail */ | |
2916 | sym = symtree->n.sym; | |
2917 | ||
3070bab4 JW |
2918 | replace_hidden_procptr_result (&sym, &symtree); |
2919 | ||
6de9cd9a DN |
2920 | e = gfc_get_expr (); |
2921 | e->symtree = symtree; | |
2922 | e->expr_type = EXPR_FUNCTION; | |
2923 | e->value.function.actual = actual_arglist; | |
63645982 | 2924 | e->where = gfc_current_locus; |
6de9cd9a | 2925 | |
102344e2 TB |
2926 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok |
2927 | && CLASS_DATA (sym)->as) | |
2928 | e->rank = CLASS_DATA (sym)->as->rank; | |
2929 | else if (sym->as != NULL) | |
6de9cd9a DN |
2930 | e->rank = sym->as->rank; |
2931 | ||
2932 | if (!sym->attr.function | |
231b2fcc | 2933 | && gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
2934 | { |
2935 | m = MATCH_ERROR; | |
2936 | break; | |
2937 | } | |
2938 | ||
a8b3b0b6 CR |
2939 | /* Check here for the existence of at least one argument for the |
2940 | iso_c_binding functions C_LOC, C_FUNLOC, and C_ASSOCIATED. The | |
2941 | argument(s) given will be checked in gfc_iso_c_func_interface, | |
2942 | during resolution of the function call. */ | |
2943 | if (sym->attr.is_iso_c == 1 | |
2944 | && (sym->from_intmod == INTMOD_ISO_C_BINDING | |
2945 | && (sym->intmod_sym_id == ISOCBINDING_LOC | |
2946 | || sym->intmod_sym_id == ISOCBINDING_FUNLOC | |
2947 | || sym->intmod_sym_id == ISOCBINDING_ASSOCIATED))) | |
2948 | { | |
2949 | /* make sure we were given a param */ | |
2950 | if (actual_arglist == NULL) | |
2951 | { | |
2952 | gfc_error ("Missing argument to '%s' at %C", sym->name); | |
2953 | m = MATCH_ERROR; | |
2954 | break; | |
2955 | } | |
2956 | } | |
2957 | ||
6de9cd9a DN |
2958 | if (sym->result == NULL) |
2959 | sym->result = sym; | |
2960 | ||
2961 | m = MATCH_YES; | |
2962 | break; | |
2963 | ||
2964 | case FL_UNKNOWN: | |
2965 | ||
2966 | /* Special case for derived type variables that get their types | |
edf1eac2 SK |
2967 | via an IMPLICIT statement. This can't wait for the |
2968 | resolution phase. */ | |
6de9cd9a | 2969 | |
8fc541d3 | 2970 | if (gfc_peek_ascii_char () == '%' |
0dd973dd | 2971 | && sym->ts.type == BT_UNKNOWN |
713485cc | 2972 | && gfc_get_default_type (sym->name, sym->ns)->type == BT_DERIVED) |
6de9cd9a DN |
2973 | gfc_set_default_type (sym, 0, sym->ns); |
2974 | ||
492792ed | 2975 | /* If the symbol has a (co)dimension attribute, the expression is a |
edf1eac2 | 2976 | variable. */ |
6de9cd9a | 2977 | |
492792ed | 2978 | if (sym->attr.dimension || sym->attr.codimension) |
6de9cd9a | 2979 | { |
231b2fcc TS |
2980 | if (gfc_add_flavor (&sym->attr, FL_VARIABLE, |
2981 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
2982 | { |
2983 | m = MATCH_ERROR; | |
2984 | break; | |
2985 | } | |
2986 | ||
2987 | e = gfc_get_expr (); | |
2988 | e->symtree = symtree; | |
2989 | e->expr_type = EXPR_VARIABLE; | |
713485cc | 2990 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
2991 | break; |
2992 | } | |
2993 | ||
cd99c23c | 2994 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok |
492792ed TB |
2995 | && (CLASS_DATA (sym)->attr.dimension |
2996 | || CLASS_DATA (sym)->attr.codimension)) | |
c49ea23d PT |
2997 | { |
2998 | if (gfc_add_flavor (&sym->attr, FL_VARIABLE, | |
2999 | sym->name, NULL) == FAILURE) | |
3000 | { | |
3001 | m = MATCH_ERROR; | |
3002 | break; | |
3003 | } | |
3004 | ||
3005 | e = gfc_get_expr (); | |
3006 | e->symtree = symtree; | |
3007 | e->expr_type = EXPR_VARIABLE; | |
3008 | m = gfc_match_varspec (e, 0, false, true); | |
3009 | break; | |
3010 | } | |
3011 | ||
6de9cd9a | 3012 | /* Name is not an array, so we peek to see if a '(' implies a |
edf1eac2 SK |
3013 | function call or a substring reference. Otherwise the |
3014 | variable is just a scalar. */ | |
6de9cd9a DN |
3015 | |
3016 | gfc_gobble_whitespace (); | |
8fc541d3 | 3017 | if (gfc_peek_ascii_char () != '(') |
6de9cd9a DN |
3018 | { |
3019 | /* Assume a scalar variable */ | |
3020 | e = gfc_get_expr (); | |
3021 | e->symtree = symtree; | |
3022 | e->expr_type = EXPR_VARIABLE; | |
3023 | ||
231b2fcc TS |
3024 | if (gfc_add_flavor (&sym->attr, FL_VARIABLE, |
3025 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
3026 | { |
3027 | m = MATCH_ERROR; | |
3028 | break; | |
3029 | } | |
3030 | ||
8e1f752a | 3031 | /*FIXME:??? gfc_match_varspec does set this for us: */ |
6de9cd9a | 3032 | e->ts = sym->ts; |
713485cc | 3033 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3034 | break; |
3035 | } | |
3036 | ||
d3fcc995 TS |
3037 | /* See if this is a function reference with a keyword argument |
3038 | as first argument. We do this because otherwise a spurious | |
3039 | symbol would end up in the symbol table. */ | |
3040 | ||
3041 | old_loc = gfc_current_locus; | |
3042 | m2 = gfc_match (" ( %n =", argname); | |
3043 | gfc_current_locus = old_loc; | |
6de9cd9a DN |
3044 | |
3045 | e = gfc_get_expr (); | |
3046 | e->symtree = symtree; | |
3047 | ||
d3fcc995 | 3048 | if (m2 != MATCH_YES) |
6de9cd9a | 3049 | { |
5270c302 AL |
3050 | /* Try to figure out whether we're dealing with a character type. |
3051 | We're peeking ahead here, because we don't want to call | |
3052 | match_substring if we're dealing with an implicitly typed | |
3053 | non-character variable. */ | |
3054 | implicit_char = false; | |
3055 | if (sym->ts.type == BT_UNKNOWN) | |
3056 | { | |
713485cc | 3057 | ts = gfc_get_default_type (sym->name, NULL); |
5270c302 AL |
3058 | if (ts->type == BT_CHARACTER) |
3059 | implicit_char = true; | |
3060 | } | |
3061 | ||
d3fcc995 TS |
3062 | /* See if this could possibly be a substring reference of a name |
3063 | that we're not sure is a variable yet. */ | |
6de9cd9a | 3064 | |
5270c302 | 3065 | if ((implicit_char || sym->ts.type == BT_CHARACTER) |
bc21d315 | 3066 | && match_substring (sym->ts.u.cl, 0, &e->ref) == MATCH_YES) |
6de9cd9a | 3067 | { |
6de9cd9a | 3068 | |
d3fcc995 TS |
3069 | e->expr_type = EXPR_VARIABLE; |
3070 | ||
3071 | if (sym->attr.flavor != FL_VARIABLE | |
231b2fcc TS |
3072 | && gfc_add_flavor (&sym->attr, FL_VARIABLE, |
3073 | sym->name, NULL) == FAILURE) | |
d3fcc995 TS |
3074 | { |
3075 | m = MATCH_ERROR; | |
3076 | break; | |
3077 | } | |
3078 | ||
3079 | if (sym->ts.type == BT_UNKNOWN | |
3080 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
3081 | { | |
3082 | m = MATCH_ERROR; | |
3083 | break; | |
3084 | } | |
3085 | ||
3086 | e->ts = sym->ts; | |
860c8f3b | 3087 | if (e->ref) |
bc21d315 | 3088 | e->ts.u.cl = NULL; |
d3fcc995 | 3089 | m = MATCH_YES; |
6de9cd9a DN |
3090 | break; |
3091 | } | |
6de9cd9a DN |
3092 | } |
3093 | ||
3094 | /* Give up, assume we have a function. */ | |
3095 | ||
08a6b8e0 | 3096 | gfc_get_sym_tree (name, NULL, &symtree, false); /* Can't fail */ |
6de9cd9a DN |
3097 | sym = symtree->n.sym; |
3098 | e->expr_type = EXPR_FUNCTION; | |
3099 | ||
3100 | if (!sym->attr.function | |
231b2fcc | 3101 | && gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
3102 | { |
3103 | m = MATCH_ERROR; | |
3104 | break; | |
3105 | } | |
3106 | ||
3107 | sym->result = sym; | |
3108 | ||
3109 | m = gfc_match_actual_arglist (0, &e->value.function.actual); | |
3110 | if (m == MATCH_NO) | |
3111 | gfc_error ("Missing argument list in function '%s' at %C", sym->name); | |
3112 | ||
3113 | if (m != MATCH_YES) | |
3114 | { | |
3115 | m = MATCH_ERROR; | |
3116 | break; | |
3117 | } | |
3118 | ||
3119 | /* If our new function returns a character, array or structure | |
edf1eac2 | 3120 | type, it might have subsequent references. */ |
6de9cd9a | 3121 | |
713485cc | 3122 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3123 | if (m == MATCH_NO) |
3124 | m = MATCH_YES; | |
3125 | ||
3126 | break; | |
3127 | ||
3128 | generic_function: | |
08a6b8e0 | 3129 | gfc_get_sym_tree (name, NULL, &symtree, false); /* Can't fail */ |
6de9cd9a DN |
3130 | |
3131 | e = gfc_get_expr (); | |
3132 | e->symtree = symtree; | |
3133 | e->expr_type = EXPR_FUNCTION; | |
3134 | ||
c3f34952 TB |
3135 | if (sym->attr.flavor == FL_DERIVED) |
3136 | { | |
3137 | e->value.function.esym = sym; | |
3138 | e->symtree->n.sym->attr.generic = 1; | |
3139 | } | |
3140 | ||
6de9cd9a DN |
3141 | m = gfc_match_actual_arglist (0, &e->value.function.actual); |
3142 | break; | |
3143 | ||
3144 | default: | |
3145 | gfc_error ("Symbol at %C is not appropriate for an expression"); | |
3146 | return MATCH_ERROR; | |
3147 | } | |
3148 | ||
3149 | if (m == MATCH_YES) | |
3150 | { | |
3151 | e->where = where; | |
3152 | *result = e; | |
3153 | } | |
3154 | else | |
3155 | gfc_free_expr (e); | |
3156 | ||
3157 | return m; | |
3158 | } | |
3159 | ||
3160 | ||
df2fba9e | 3161 | /* Match a variable, i.e. something that can be assigned to. This |
6de9cd9a DN |
3162 | starts as a symbol, can be a structure component or an array |
3163 | reference. It can be a function if the function doesn't have a | |
3164 | separate RESULT variable. If the symbol has not been previously | |
30aabb86 | 3165 | seen, we assume it is a variable. |
6de9cd9a | 3166 | |
30aabb86 PT |
3167 | This function is called by two interface functions: |
3168 | gfc_match_variable, which has host_flag = 1, and | |
3169 | gfc_match_equiv_variable, with host_flag = 0, to restrict the | |
3170 | match of the symbol to the local scope. */ | |
3171 | ||
3172 | static match | |
edf1eac2 | 3173 | match_variable (gfc_expr **result, int equiv_flag, int host_flag) |
6de9cd9a DN |
3174 | { |
3175 | gfc_symbol *sym; | |
3176 | gfc_symtree *st; | |
3177 | gfc_expr *expr; | |
3178 | locus where; | |
3179 | match m; | |
3180 | ||
fd2aa7ad PT |
3181 | /* Since nothing has any business being an lvalue in a module |
3182 | specification block, an interface block or a contains section, | |
3183 | we force the changed_symbols mechanism to work by setting | |
3184 | host_flag to 0. This prevents valid symbols that have the name | |
3185 | of keywords, such as 'end', being turned into variables by | |
df2fba9e | 3186 | failed matching to assignments for, e.g., END INTERFACE. */ |
fd2aa7ad PT |
3187 | if (gfc_current_state () == COMP_MODULE |
3188 | || gfc_current_state () == COMP_INTERFACE | |
3189 | || gfc_current_state () == COMP_CONTAINS) | |
3190 | host_flag = 0; | |
3191 | ||
618f4f46 | 3192 | where = gfc_current_locus; |
30aabb86 | 3193 | m = gfc_match_sym_tree (&st, host_flag); |
6de9cd9a DN |
3194 | if (m != MATCH_YES) |
3195 | return m; | |
6de9cd9a DN |
3196 | |
3197 | sym = st->n.sym; | |
9a3db5a3 PT |
3198 | |
3199 | /* If this is an implicit do loop index and implicitly typed, | |
3200 | it should not be host associated. */ | |
3201 | m = check_for_implicit_index (&st, &sym); | |
3202 | if (m != MATCH_YES) | |
3203 | return m; | |
3204 | ||
3205 | sym->attr.implied_index = 0; | |
3206 | ||
6de9cd9a DN |
3207 | gfc_set_sym_referenced (sym); |
3208 | switch (sym->attr.flavor) | |
3209 | { | |
3210 | case FL_VARIABLE: | |
8c91ab34 | 3211 | /* Everything is alright. */ |
6de9cd9a DN |
3212 | break; |
3213 | ||
3214 | case FL_UNKNOWN: | |
d7e2fcd0 TB |
3215 | { |
3216 | sym_flavor flavor = FL_UNKNOWN; | |
3217 | ||
3218 | gfc_gobble_whitespace (); | |
3219 | ||
3220 | if (sym->attr.external || sym->attr.procedure | |
3221 | || sym->attr.function || sym->attr.subroutine) | |
3222 | flavor = FL_PROCEDURE; | |
b9332b09 PT |
3223 | |
3224 | /* If it is not a procedure, is not typed and is host associated, | |
3225 | we cannot give it a flavor yet. */ | |
3226 | else if (sym->ns == gfc_current_ns->parent | |
3227 | && sym->ts.type == BT_UNKNOWN) | |
3228 | break; | |
3229 | ||
3230 | /* These are definitive indicators that this is a variable. */ | |
8fc541d3 | 3231 | else if (gfc_peek_ascii_char () != '(' || sym->ts.type != BT_UNKNOWN |
d7e2fcd0 TB |
3232 | || sym->attr.pointer || sym->as != NULL) |
3233 | flavor = FL_VARIABLE; | |
3234 | ||
3235 | if (flavor != FL_UNKNOWN | |
3236 | && gfc_add_flavor (&sym->attr, flavor, sym->name, NULL) == FAILURE) | |
3237 | return MATCH_ERROR; | |
3238 | } | |
6de9cd9a DN |
3239 | break; |
3240 | ||
5056a350 SK |
3241 | case FL_PARAMETER: |
3242 | if (equiv_flag) | |
8c91ab34 DK |
3243 | { |
3244 | gfc_error ("Named constant at %C in an EQUIVALENCE"); | |
3245 | return MATCH_ERROR; | |
3246 | } | |
3247 | /* Otherwise this is checked for and an error given in the | |
3248 | variable definition context checks. */ | |
5056a350 SK |
3249 | break; |
3250 | ||
6de9cd9a | 3251 | case FL_PROCEDURE: |
01d2a7d7 DF |
3252 | /* Check for a nonrecursive function result variable. */ |
3253 | if (sym->attr.function | |
8c91ab34 DK |
3254 | && !sym->attr.external |
3255 | && sym->result == sym | |
3256 | && (gfc_is_function_return_value (sym, gfc_current_ns) | |
3257 | || (sym->attr.entry | |
3258 | && sym->ns == gfc_current_ns) | |
3259 | || (sym->attr.entry | |
3260 | && sym->ns == gfc_current_ns->parent))) | |
6de9cd9a | 3261 | { |
6de9cd9a DN |
3262 | /* If a function result is a derived type, then the derived |
3263 | type may still have to be resolved. */ | |
3264 | ||
3265 | if (sym->ts.type == BT_DERIVED | |
bc21d315 | 3266 | && gfc_use_derived (sym->ts.u.derived) == NULL) |
6de9cd9a | 3267 | return MATCH_ERROR; |
6de9cd9a DN |
3268 | break; |
3269 | } | |
3270 | ||
3070bab4 JW |
3271 | if (sym->attr.proc_pointer |
3272 | || replace_hidden_procptr_result (&sym, &st) == SUCCESS) | |
8fb74da4 JW |
3273 | break; |
3274 | ||
6de9cd9a DN |
3275 | /* Fall through to error */ |
3276 | ||
3277 | default: | |
d7e2fcd0 | 3278 | gfc_error ("'%s' at %C is not a variable", sym->name); |
6de9cd9a DN |
3279 | return MATCH_ERROR; |
3280 | } | |
3281 | ||
0dd973dd PB |
3282 | /* Special case for derived type variables that get their types |
3283 | via an IMPLICIT statement. This can't wait for the | |
3284 | resolution phase. */ | |
3285 | ||
3286 | { | |
3287 | gfc_namespace * implicit_ns; | |
3288 | ||
3289 | if (gfc_current_ns->proc_name == sym) | |
3290 | implicit_ns = gfc_current_ns; | |
3291 | else | |
3292 | implicit_ns = sym->ns; | |
3293 | ||
8fc541d3 | 3294 | if (gfc_peek_ascii_char () == '%' |
0dd973dd | 3295 | && sym->ts.type == BT_UNKNOWN |
713485cc | 3296 | && gfc_get_default_type (sym->name, implicit_ns)->type == BT_DERIVED) |
0dd973dd PB |
3297 | gfc_set_default_type (sym, 0, implicit_ns); |
3298 | } | |
3299 | ||
6de9cd9a DN |
3300 | expr = gfc_get_expr (); |
3301 | ||
3302 | expr->expr_type = EXPR_VARIABLE; | |
3303 | expr->symtree = st; | |
3304 | expr->ts = sym->ts; | |
3305 | expr->where = where; | |
3306 | ||
3307 | /* Now see if we have to do more. */ | |
713485cc | 3308 | m = gfc_match_varspec (expr, equiv_flag, false, false); |
6de9cd9a DN |
3309 | if (m != MATCH_YES) |
3310 | { | |
3311 | gfc_free_expr (expr); | |
3312 | return m; | |
3313 | } | |
3314 | ||
3315 | *result = expr; | |
3316 | return MATCH_YES; | |
3317 | } | |
30aabb86 | 3318 | |
edf1eac2 | 3319 | |
30aabb86 | 3320 | match |
edf1eac2 | 3321 | gfc_match_variable (gfc_expr **result, int equiv_flag) |
30aabb86 PT |
3322 | { |
3323 | return match_variable (result, equiv_flag, 1); | |
3324 | } | |
3325 | ||
edf1eac2 | 3326 | |
30aabb86 | 3327 | match |
edf1eac2 | 3328 | gfc_match_equiv_variable (gfc_expr **result) |
30aabb86 PT |
3329 | { |
3330 | return match_variable (result, 1, 0); | |
3331 | } | |
3332 |