Line data Source code
1 : /* Primary expression subroutines
2 : Copyright (C) 2000-2026 Free Software Foundation, Inc.
3 : Contributed by Andy Vaught
4 :
5 : This file is part of GCC.
6 :
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
9 : Software Foundation; either version 3, or (at your option) any later
10 : version.
11 :
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.
16 :
17 : You should have received a copy of the GNU General Public License
18 : along with GCC; see the file COPYING3. If not see
19 : <http://www.gnu.org/licenses/>. */
20 :
21 : #include "config.h"
22 : #include "system.h"
23 : #include "coretypes.h"
24 : #include "options.h"
25 : #include "gfortran.h"
26 : #include "arith.h"
27 : #include "match.h"
28 : #include "parse.h"
29 : #include "constructor.h"
30 :
31 : int matching_actual_arglist = 0;
32 :
33 : /* Matches a kind-parameter expression, which is either a named
34 : symbolic constant or a nonnegative integer constant. If
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'. */
38 :
39 : static match
40 473508 : match_kind_param (int *kind, int *is_iso_c)
41 : {
42 473508 : char name[GFC_MAX_SYMBOL_LEN + 1];
43 473508 : gfc_symbol *sym;
44 473508 : match m;
45 :
46 473508 : *is_iso_c = 0;
47 :
48 473508 : m = gfc_match_small_literal_int (kind, NULL, false);
49 473508 : if (m != MATCH_NO)
50 : return m;
51 :
52 95026 : m = gfc_match_name (name, false);
53 95026 : if (m != MATCH_YES)
54 : return m;
55 :
56 93294 : if (gfc_find_symbol (name, NULL, 1, &sym))
57 : return MATCH_ERROR;
58 :
59 93294 : if (sym == NULL)
60 : return MATCH_NO;
61 :
62 93293 : *is_iso_c = sym->attr.is_iso_c;
63 :
64 93293 : if (sym->attr.flavor != FL_PARAMETER)
65 : return MATCH_NO;
66 :
67 93293 : if (sym->value == NULL)
68 : return MATCH_NO;
69 :
70 93292 : if (gfc_extract_int (sym->value, kind))
71 : return MATCH_NO;
72 :
73 93292 : gfc_set_sym_referenced (sym);
74 :
75 93292 : if (*kind < 0)
76 : return MATCH_NO;
77 :
78 : return MATCH_YES;
79 : }
80 :
81 :
82 : /* Get a trailing kind-specification for non-character variables.
83 : Returns:
84 : * the integer kind value or
85 : * -1 if an error was generated,
86 : * -2 if no kind was found.
87 : The argument 'is_iso_c' signals whether the kind is an ISO_C_BINDING
88 : symbol like e.g. 'c_int'. */
89 :
90 : static int
91 4608150 : get_kind (int *is_iso_c)
92 : {
93 4608150 : int kind;
94 4608150 : match m;
95 :
96 4608150 : *is_iso_c = 0;
97 :
98 4608150 : if (gfc_match_char ('_', false) != MATCH_YES)
99 : return -2;
100 :
101 473508 : m = match_kind_param (&kind, is_iso_c);
102 473508 : if (m == MATCH_NO)
103 1734 : gfc_error ("Missing kind-parameter at %C");
104 :
105 473508 : return (m == MATCH_YES) ? kind : -1;
106 : }
107 :
108 :
109 : /* Given a character and a radix, see if the character is a valid
110 : digit in that radix. */
111 :
112 : bool
113 31015808 : gfc_check_digit (char c, int radix)
114 : {
115 31015808 : bool r;
116 :
117 31015808 : switch (radix)
118 : {
119 15638 : case 2:
120 15638 : r = ('0' <= c && c <= '1');
121 15638 : break;
122 :
123 19182 : case 8:
124 19182 : r = ('0' <= c && c <= '7');
125 19182 : break;
126 :
127 30916205 : case 10:
128 30916205 : r = ('0' <= c && c <= '9');
129 30916205 : break;
130 :
131 64783 : case 16:
132 64783 : r = ISXDIGIT (c);
133 64783 : break;
134 :
135 0 : default:
136 0 : gfc_internal_error ("gfc_check_digit(): bad radix");
137 : }
138 :
139 31015808 : return r;
140 : }
141 :
142 :
143 : /* Match the digit string part of an integer if signflag is not set,
144 : the signed digit string part if signflag is set. If the buffer
145 : is NULL, we just count characters for the resolution pass. Returns
146 : the number of characters matched, -1 for no match. */
147 :
148 : static int
149 18121127 : match_digits (int signflag, int radix, char *buffer)
150 : {
151 18121127 : locus old_loc;
152 18121127 : int length;
153 18121127 : char c;
154 :
155 18121127 : length = 0;
156 18121127 : c = gfc_next_ascii_char ();
157 :
158 18121127 : if (signflag && (c == '+' || c == '-'))
159 : {
160 5716 : if (buffer != NULL)
161 2285 : *buffer++ = c;
162 5716 : gfc_gobble_whitespace ();
163 5716 : c = gfc_next_ascii_char ();
164 5716 : length++;
165 : }
166 :
167 18121127 : if (!gfc_check_digit (c, radix))
168 : return -1;
169 :
170 8687304 : length++;
171 8687304 : if (buffer != NULL)
172 4335495 : *buffer++ = c;
173 :
174 17051594 : for (;;)
175 : {
176 12869449 : old_loc = gfc_current_locus;
177 12869449 : c = gfc_next_ascii_char ();
178 :
179 12869449 : if (!gfc_check_digit (c, radix))
180 : break;
181 :
182 4182145 : if (buffer != NULL)
183 2088801 : *buffer++ = c;
184 4182145 : length++;
185 : }
186 :
187 8687304 : gfc_current_locus = old_loc;
188 :
189 8687304 : return length;
190 : }
191 :
192 : /* Convert an integer string to an expression node. */
193 :
194 : static gfc_expr *
195 4228232 : convert_integer (const char *buffer, int kind, int radix, locus *where)
196 : {
197 4228232 : gfc_expr *e;
198 4228232 : const char *t;
199 :
200 4228232 : e = gfc_get_constant_expr (BT_INTEGER, kind, where);
201 : /* A leading plus is allowed, but not by mpz_set_str. */
202 4228232 : if (buffer[0] == '+')
203 21 : t = buffer + 1;
204 : else
205 : t = buffer;
206 4228232 : mpz_set_str (e->value.integer, t, radix);
207 :
208 4228232 : return e;
209 : }
210 :
211 :
212 : /* Convert an unsigned string to an expression node. XXX:
213 : This needs a calculation modulo 2^n. TODO: Implement restriction
214 : that no unary minus is permitted. */
215 : static gfc_expr *
216 101372 : convert_unsigned (const char *buffer, int kind, int radix, locus *where)
217 : {
218 101372 : gfc_expr *e;
219 101372 : const char *t;
220 101372 : int k;
221 101372 : arith rc;
222 :
223 101372 : e = gfc_get_constant_expr (BT_UNSIGNED, kind, where);
224 : /* A leading plus is allowed, but not by mpz_set_str. */
225 101372 : if (buffer[0] == '+')
226 0 : t = buffer + 1;
227 : else
228 : t = buffer;
229 :
230 101372 : mpz_set_str (e->value.integer, t, radix);
231 :
232 101372 : k = gfc_validate_kind (BT_UNSIGNED, kind, false);
233 :
234 : /* TODO Maybe move this somewhere else. */
235 101372 : rc = gfc_range_check (e);
236 101372 : if (rc != ARITH_OK)
237 : {
238 2 : if (pedantic)
239 1 : gfc_error_now (gfc_arith_error (rc), &e->where);
240 : else
241 1 : gfc_warning (0, gfc_arith_error (rc), &e->where);
242 : }
243 :
244 101372 : gfc_convert_mpz_to_unsigned (e->value.integer, gfc_unsigned_kinds[k].bit_size,
245 : false);
246 :
247 101372 : return e;
248 : }
249 :
250 : /* Convert a real string to an expression node. */
251 :
252 : static gfc_expr *
253 220119 : convert_real (const char *buffer, int kind, locus *where)
254 : {
255 220119 : gfc_expr *e;
256 :
257 220119 : e = gfc_get_constant_expr (BT_REAL, kind, where);
258 220119 : mpfr_set_str (e->value.real, buffer, 10, GFC_RND_MODE);
259 :
260 220119 : return e;
261 : }
262 :
263 :
264 : /* Convert a pair of real, constant expression nodes to a single
265 : complex expression node. */
266 :
267 : static gfc_expr *
268 6993 : convert_complex (gfc_expr *real, gfc_expr *imag, int kind)
269 : {
270 6993 : gfc_expr *e;
271 :
272 6993 : e = gfc_get_constant_expr (BT_COMPLEX, kind, &real->where);
273 6993 : mpc_set_fr_fr (e->value.complex, real->value.real, imag->value.real,
274 : GFC_MPC_RND_MODE);
275 :
276 6993 : return e;
277 : }
278 :
279 :
280 : /* Match an integer (digit string and optional kind).
281 : A sign will be accepted if signflag is set. */
282 :
283 : static match
284 13192478 : match_integer_constant (gfc_expr **result, int signflag)
285 : {
286 13192478 : int length, kind, is_iso_c;
287 13192478 : locus old_loc;
288 13192478 : char *buffer;
289 13192478 : gfc_expr *e;
290 :
291 13192478 : old_loc = gfc_current_locus;
292 13192478 : gfc_gobble_whitespace ();
293 :
294 13192478 : length = match_digits (signflag, 10, NULL);
295 13192478 : gfc_current_locus = old_loc;
296 13192478 : if (length == -1)
297 : return MATCH_NO;
298 :
299 4229966 : buffer = (char *) alloca (length + 1);
300 4229966 : memset (buffer, '\0', length + 1);
301 :
302 4229966 : gfc_gobble_whitespace ();
303 :
304 4229966 : match_digits (signflag, 10, buffer);
305 :
306 4229966 : kind = get_kind (&is_iso_c);
307 4229966 : if (kind == -2)
308 3922284 : kind = gfc_default_integer_kind;
309 4229966 : if (kind == -1)
310 : return MATCH_ERROR;
311 :
312 4228236 : if (kind == 4 && flag_integer4_kind == 8)
313 0 : kind = 8;
314 :
315 4228236 : if (gfc_validate_kind (BT_INTEGER, kind, true) < 0)
316 : {
317 4 : gfc_error ("Integer kind %d at %C not available", kind);
318 4 : return MATCH_ERROR;
319 : }
320 :
321 4228232 : e = convert_integer (buffer, kind, 10, &gfc_current_locus);
322 4228232 : e->ts.is_c_interop = is_iso_c;
323 :
324 4228232 : if (gfc_range_check (e) != ARITH_OK)
325 : {
326 9586 : gfc_error ("Integer too big for its kind at %C. This check can be "
327 : "disabled with the option %<-fno-range-check%>");
328 :
329 9586 : gfc_free_expr (e);
330 9586 : return MATCH_ERROR;
331 : }
332 :
333 4218646 : *result = e;
334 4218646 : return MATCH_YES;
335 : }
336 :
337 : /* Match an unsigned constant (an integer with suffix u). No sign
338 : is currently accepted, in accordance with 24-116.txt, but that
339 : could be changed later. This is very much like the integer
340 : constant matching above, but with enough differences to put it into
341 : its own function. */
342 :
343 : static match
344 588996 : match_unsigned_constant (gfc_expr **result)
345 : {
346 588996 : int length, kind, is_iso_c;
347 588996 : locus old_loc;
348 588996 : char *buffer;
349 588996 : gfc_expr *e;
350 588996 : match m;
351 :
352 588996 : old_loc = gfc_current_locus;
353 588996 : gfc_gobble_whitespace ();
354 :
355 588996 : length = match_digits (/* signflag = */ false, 10, NULL);
356 :
357 588996 : if (length == -1)
358 471311 : goto fail;
359 :
360 117685 : m = gfc_match_char ('u');
361 117685 : if (m == MATCH_NO)
362 16313 : goto fail;
363 :
364 101372 : gfc_current_locus = old_loc;
365 :
366 101372 : buffer = (char *) alloca (length + 1);
367 101372 : memset (buffer, '\0', length + 1);
368 :
369 101372 : gfc_gobble_whitespace ();
370 :
371 101372 : match_digits (false, 10, buffer);
372 :
373 101372 : m = gfc_match_char ('u');
374 101372 : if (m == MATCH_NO)
375 0 : goto fail;
376 :
377 101372 : kind = get_kind (&is_iso_c);
378 101372 : if (kind == -2)
379 8357 : kind = gfc_default_unsigned_kind;
380 101372 : if (kind == -1)
381 : return MATCH_ERROR;
382 :
383 101372 : if (kind == 4 && flag_integer4_kind == 8)
384 0 : kind = 8;
385 :
386 101372 : if (gfc_validate_kind (BT_UNSIGNED, kind, true) < 0)
387 : {
388 0 : gfc_error ("Unsigned kind %d at %C not available", kind);
389 0 : return MATCH_ERROR;
390 : }
391 :
392 101372 : e = convert_unsigned (buffer, kind, 10, &gfc_current_locus);
393 101372 : e->ts.is_c_interop = is_iso_c;
394 :
395 101372 : *result = e;
396 101372 : return MATCH_YES;
397 :
398 487624 : fail:
399 487624 : gfc_current_locus = old_loc;
400 487624 : return MATCH_NO;
401 : }
402 :
403 : /* Match a Hollerith constant. */
404 :
405 : static match
406 6601657 : match_hollerith_constant (gfc_expr **result)
407 : {
408 6601657 : locus old_loc;
409 6601657 : gfc_expr *e = NULL;
410 6601657 : int num, pad;
411 6601657 : int i;
412 :
413 6601657 : old_loc = gfc_current_locus;
414 6601657 : gfc_gobble_whitespace ();
415 :
416 6601657 : if (match_integer_constant (&e, 0) == MATCH_YES
417 6601657 : && gfc_match_char ('h') == MATCH_YES)
418 : {
419 2636 : if (!gfc_notify_std (GFC_STD_LEGACY, "Hollerith constant at %C"))
420 14 : goto cleanup;
421 :
422 2622 : if (gfc_extract_int (e, &num, 1))
423 0 : goto cleanup;
424 2622 : if (num == 0)
425 : {
426 1 : gfc_error ("Invalid Hollerith constant: %L must contain at least "
427 : "one character", &old_loc);
428 1 : goto cleanup;
429 : }
430 2621 : if (e->ts.kind != gfc_default_integer_kind)
431 : {
432 1 : gfc_error ("Invalid Hollerith constant: Integer kind at %L "
433 : "should be default", &old_loc);
434 1 : goto cleanup;
435 : }
436 : else
437 : {
438 2620 : gfc_free_expr (e);
439 2620 : e = gfc_get_constant_expr (BT_HOLLERITH, gfc_default_character_kind,
440 : &gfc_current_locus);
441 :
442 : /* Calculate padding needed to fit default integer memory. */
443 2620 : pad = gfc_default_integer_kind - (num % gfc_default_integer_kind);
444 :
445 2620 : e->representation.string = XCNEWVEC (char, num + pad + 1);
446 :
447 14886 : for (i = 0; i < num; i++)
448 : {
449 12266 : gfc_char_t c = gfc_next_char_literal (INSTRING_WARN);
450 12266 : if (! gfc_wide_fits_in_byte (c))
451 : {
452 0 : gfc_error ("Invalid Hollerith constant at %L contains a "
453 : "wide character", &old_loc);
454 0 : goto cleanup;
455 : }
456 :
457 12266 : e->representation.string[i] = (unsigned char) c;
458 : }
459 :
460 : /* Now pad with blanks and end with a null char. */
461 11762 : for (i = 0; i < pad; i++)
462 9142 : e->representation.string[num + i] = ' ';
463 :
464 2620 : e->representation.string[num + i] = '\0';
465 2620 : e->representation.length = num + pad;
466 2620 : e->ts.u.pad = pad;
467 :
468 2620 : *result = e;
469 2620 : return MATCH_YES;
470 : }
471 : }
472 :
473 6599021 : gfc_free_expr (e);
474 6599021 : gfc_current_locus = old_loc;
475 6599021 : return MATCH_NO;
476 :
477 16 : cleanup:
478 16 : gfc_free_expr (e);
479 16 : return MATCH_ERROR;
480 : }
481 :
482 :
483 : /* Match a binary, octal or hexadecimal constant that can be found in
484 : a DATA statement. The standard permits b'010...', o'73...', and
485 : z'a1...' where b, o, and z can be capital letters. This function
486 : also accepts postfixed forms of the constants: '01...'b, '73...'o,
487 : and 'a1...'z. An additional extension is the use of x for z. */
488 :
489 : static match
490 6811617 : match_boz_constant (gfc_expr **result)
491 : {
492 6811617 : int radix, length, x_hex;
493 6811617 : locus old_loc, start_loc;
494 6811617 : char *buffer, post, delim;
495 6811617 : gfc_expr *e;
496 :
497 6811617 : start_loc = old_loc = gfc_current_locus;
498 6811617 : gfc_gobble_whitespace ();
499 :
500 6811617 : x_hex = 0;
501 6811617 : switch (post = gfc_next_ascii_char ())
502 : {
503 : case 'b':
504 : radix = 2;
505 : post = 0;
506 : break;
507 56821 : case 'o':
508 56821 : radix = 8;
509 56821 : post = 0;
510 56821 : break;
511 91102 : case 'x':
512 91102 : x_hex = 1;
513 : /* Fall through. */
514 : case 'z':
515 : radix = 16;
516 : post = 0;
517 : break;
518 : case '\'':
519 : /* Fall through. */
520 : case '\"':
521 : delim = post;
522 : post = 1;
523 : radix = 16; /* Set to accept any valid digit string. */
524 : break;
525 6524285 : default:
526 6524285 : goto backup;
527 : }
528 :
529 : /* No whitespace allowed here. */
530 :
531 56821 : if (post == 0)
532 287307 : delim = gfc_next_ascii_char ();
533 :
534 287332 : if (delim != '\'' && delim != '\"')
535 283172 : goto backup;
536 :
537 4160 : if (x_hex
538 4160 : && gfc_invalid_boz (G_("Hexadecimal constant at %L uses "
539 : "nonstandard X instead of Z"), &gfc_current_locus))
540 : return MATCH_ERROR;
541 :
542 4158 : old_loc = gfc_current_locus;
543 :
544 4158 : length = match_digits (0, radix, NULL);
545 4158 : if (length == -1)
546 : {
547 0 : gfc_error ("Empty set of digits in BOZ constant at %C");
548 0 : return MATCH_ERROR;
549 : }
550 :
551 4158 : if (gfc_next_ascii_char () != delim)
552 : {
553 0 : gfc_error ("Illegal character in BOZ constant at %C");
554 0 : return MATCH_ERROR;
555 : }
556 :
557 4158 : if (post == 1)
558 : {
559 25 : switch (gfc_next_ascii_char ())
560 : {
561 : case 'b':
562 : radix = 2;
563 : break;
564 6 : case 'o':
565 6 : radix = 8;
566 6 : break;
567 13 : case 'x':
568 : /* Fall through. */
569 13 : case 'z':
570 13 : radix = 16;
571 13 : break;
572 0 : default:
573 0 : goto backup;
574 : }
575 :
576 25 : if (gfc_invalid_boz (G_("BOZ constant at %C uses nonstandard postfix "
577 : "syntax"), &gfc_current_locus))
578 : return MATCH_ERROR;
579 : }
580 :
581 4157 : gfc_current_locus = old_loc;
582 :
583 4157 : buffer = (char *) alloca (length + 1);
584 4157 : memset (buffer, '\0', length + 1);
585 :
586 4157 : match_digits (0, radix, buffer);
587 4157 : gfc_next_ascii_char (); /* Eat delimiter. */
588 4157 : if (post == 1)
589 24 : gfc_next_ascii_char (); /* Eat postfixed b, o, z, or x. */
590 :
591 4157 : e = gfc_get_expr ();
592 4157 : e->expr_type = EXPR_CONSTANT;
593 4157 : e->ts.type = BT_BOZ;
594 4157 : e->where = gfc_current_locus;
595 4157 : e->boz.rdx = radix;
596 4157 : e->boz.len = length;
597 4157 : e->boz.str = XCNEWVEC (char, length + 1);
598 4157 : strncpy (e->boz.str, buffer, length);
599 :
600 4157 : if (!gfc_in_match_data ()
601 4157 : && (!gfc_notify_std(GFC_STD_F2003, "BOZ used outside a DATA "
602 : "statement at %L", &e->where)))
603 : return MATCH_ERROR;
604 :
605 4152 : *result = e;
606 4152 : return MATCH_YES;
607 :
608 6807457 : backup:
609 6807457 : gfc_current_locus = start_loc;
610 6807457 : return MATCH_NO;
611 : }
612 :
613 :
614 : /* Match a real constant of some sort. Allow a signed constant if signflag
615 : is nonzero. */
616 :
617 : static match
618 6914962 : match_real_constant (gfc_expr **result, int signflag)
619 : {
620 6914962 : int kind, count, seen_dp, seen_digits, is_iso_c, default_exponent;
621 6914962 : locus old_loc, temp_loc;
622 6914962 : char *p, *buffer, c, exp_char;
623 6914962 : gfc_expr *e;
624 6914962 : bool negate;
625 :
626 6914962 : old_loc = gfc_current_locus;
627 6914962 : gfc_gobble_whitespace ();
628 :
629 6914962 : e = NULL;
630 :
631 6914962 : default_exponent = 0;
632 6914962 : count = 0;
633 6914962 : seen_dp = 0;
634 6914962 : seen_digits = 0;
635 6914962 : exp_char = ' ';
636 6914962 : negate = false;
637 :
638 6914962 : c = gfc_next_ascii_char ();
639 6914962 : if (signflag && (c == '+' || c == '-'))
640 : {
641 6468 : if (c == '-')
642 6332 : negate = true;
643 :
644 6468 : gfc_gobble_whitespace ();
645 6468 : c = gfc_next_ascii_char ();
646 : }
647 :
648 : /* Scan significand. */
649 3944415 : for (;; c = gfc_next_ascii_char (), count++)
650 : {
651 10859377 : if (c == '.')
652 : {
653 280540 : if (seen_dp)
654 204 : goto done;
655 :
656 : /* Check to see if "." goes with a following operator like
657 : ".eq.". */
658 280336 : temp_loc = gfc_current_locus;
659 280336 : c = gfc_next_ascii_char ();
660 :
661 280336 : if (c == 'e' || c == 'd' || c == 'q')
662 : {
663 17710 : c = gfc_next_ascii_char ();
664 17710 : if (c == '.')
665 0 : goto done; /* Operator named .e. or .d. */
666 : }
667 :
668 280336 : if (ISALPHA (c))
669 67039 : goto done; /* Distinguish 1.e9 from 1.eq.2 */
670 :
671 213297 : gfc_current_locus = temp_loc;
672 213297 : seen_dp = 1;
673 213297 : continue;
674 : }
675 :
676 10578837 : if (ISDIGIT (c))
677 : {
678 3731118 : seen_digits = 1;
679 3731118 : continue;
680 : }
681 :
682 6847719 : break;
683 : }
684 :
685 6847719 : if (!seen_digits || (c != 'e' && c != 'd' && c != 'q'))
686 2351090 : goto done;
687 38127 : exp_char = c;
688 :
689 :
690 38127 : if (c == 'q')
691 : {
692 0 : if (!gfc_notify_std (GFC_STD_GNU, "exponent-letter %<q%> in "
693 : "real-literal-constant at %C"))
694 : return MATCH_ERROR;
695 0 : else if (warn_real_q_constant)
696 0 : gfc_warning (OPT_Wreal_q_constant,
697 : "Extension: exponent-letter %<q%> in real-literal-constant "
698 : "at %C");
699 : }
700 :
701 : /* Scan exponent. */
702 38127 : c = gfc_next_ascii_char ();
703 38127 : count++;
704 :
705 38127 : if (c == '+' || c == '-')
706 : { /* optional sign */
707 7283 : c = gfc_next_ascii_char ();
708 7283 : count++;
709 : }
710 :
711 38127 : if (!ISDIGIT (c))
712 : {
713 : /* With -fdec, default exponent to 0 instead of complaining. */
714 40 : if (flag_dec)
715 38117 : default_exponent = 1;
716 : else
717 : {
718 10 : gfc_error ("Missing exponent in real number at %C");
719 10 : return MATCH_ERROR;
720 : }
721 : }
722 :
723 79157 : while (ISDIGIT (c))
724 : {
725 41040 : c = gfc_next_ascii_char ();
726 41040 : count++;
727 : }
728 :
729 6914952 : done:
730 : /* Check that we have a numeric constant. */
731 6914952 : if (!seen_digits || (!seen_dp && exp_char == ' '))
732 : {
733 6694829 : gfc_current_locus = old_loc;
734 6694829 : return MATCH_NO;
735 : }
736 :
737 : /* Convert the number. */
738 220123 : gfc_current_locus = old_loc;
739 220123 : gfc_gobble_whitespace ();
740 :
741 220123 : buffer = (char *) alloca (count + default_exponent + 1);
742 220123 : memset (buffer, '\0', count + default_exponent + 1);
743 :
744 220123 : p = buffer;
745 220123 : c = gfc_next_ascii_char ();
746 220123 : if (c == '+' || c == '-')
747 : {
748 3037 : gfc_gobble_whitespace ();
749 3037 : c = gfc_next_ascii_char ();
750 : }
751 :
752 : /* Hack for mpfr_set_str(). */
753 1426233 : for (;;)
754 : {
755 823178 : if (c == 'd' || c == 'q')
756 30252 : *p = 'e';
757 : else
758 792926 : *p = c;
759 823178 : p++;
760 823178 : if (--count == 0)
761 : break;
762 :
763 603055 : c = gfc_next_ascii_char ();
764 : }
765 220123 : if (default_exponent)
766 30 : *p++ = '0';
767 :
768 220123 : kind = get_kind (&is_iso_c);
769 220123 : if (kind == -1)
770 4 : goto cleanup;
771 :
772 220119 : if (kind == 4)
773 : {
774 20586 : if (flag_real4_kind == 8)
775 192 : kind = 8;
776 20586 : if (flag_real4_kind == 10)
777 192 : kind = 10;
778 20586 : if (flag_real4_kind == 16)
779 384 : kind = 16;
780 : }
781 199533 : else if (kind == 8)
782 : {
783 27360 : if (flag_real8_kind == 4)
784 192 : kind = 4;
785 27360 : if (flag_real8_kind == 10)
786 192 : kind = 10;
787 27360 : if (flag_real8_kind == 16)
788 384 : kind = 16;
789 : }
790 :
791 220119 : switch (exp_char)
792 : {
793 30252 : case 'd':
794 30252 : if (kind != -2)
795 : {
796 0 : gfc_error ("Real number at %C has a %<d%> exponent and an explicit "
797 : "kind");
798 0 : goto cleanup;
799 : }
800 30252 : kind = gfc_default_double_kind;
801 30252 : break;
802 :
803 0 : case 'q':
804 0 : if (kind != -2)
805 : {
806 0 : gfc_error ("Real number at %C has a %<q%> exponent and an explicit "
807 : "kind");
808 0 : goto cleanup;
809 : }
810 :
811 : /* The maximum possible real kind type parameter is 16. First, try
812 : that for the kind, then fallback to trying kind=10 (Intel 80 bit)
813 : extended precision. If neither value works, just given up. */
814 0 : kind = 16;
815 0 : if (gfc_validate_kind (BT_REAL, kind, true) < 0)
816 : {
817 0 : kind = 10;
818 0 : if (gfc_validate_kind (BT_REAL, kind, true) < 0)
819 : {
820 0 : gfc_error ("Invalid exponent-letter %<q%> in "
821 : "real-literal-constant at %C");
822 0 : goto cleanup;
823 : }
824 : }
825 : break;
826 :
827 189867 : default:
828 189867 : if (kind == -2)
829 117549 : kind = gfc_default_real_kind;
830 :
831 189867 : if (gfc_validate_kind (BT_REAL, kind, true) < 0)
832 : {
833 0 : gfc_error ("Invalid real kind %d at %C", kind);
834 0 : goto cleanup;
835 : }
836 : }
837 :
838 220119 : e = convert_real (buffer, kind, &gfc_current_locus);
839 220119 : if (negate)
840 2932 : mpfr_neg (e->value.real, e->value.real, GFC_RND_MODE);
841 220119 : e->ts.is_c_interop = is_iso_c;
842 :
843 220119 : switch (gfc_range_check (e))
844 : {
845 : case ARITH_OK:
846 : break;
847 1 : case ARITH_OVERFLOW:
848 1 : gfc_error ("Real constant overflows its kind at %C");
849 1 : goto cleanup;
850 :
851 0 : case ARITH_UNDERFLOW:
852 0 : if (warn_underflow)
853 0 : gfc_warning (OPT_Wunderflow, "Real constant underflows its kind at %C");
854 0 : mpfr_set_ui (e->value.real, 0, GFC_RND_MODE);
855 0 : break;
856 :
857 0 : default:
858 0 : gfc_internal_error ("gfc_range_check() returned bad value");
859 : }
860 :
861 : /* Warn about trailing digits which suggest the user added too many
862 : trailing digits, which may cause the appearance of higher precision
863 : than the kind can support.
864 :
865 : This is done by replacing the rightmost non-zero digit with zero
866 : and comparing with the original value. If these are equal, we
867 : assume the user supplied more digits than intended (or forgot to
868 : convert to the correct kind).
869 : */
870 :
871 220118 : if (warn_conversion_extra)
872 : {
873 21 : mpfr_t r;
874 21 : char *c1;
875 21 : bool did_break;
876 :
877 21 : c1 = strchr (buffer, 'e');
878 21 : if (c1 == NULL)
879 18 : c1 = buffer + strlen(buffer);
880 :
881 30 : did_break = false;
882 30 : for (p = c1; p > buffer;)
883 : {
884 30 : p--;
885 30 : if (*p == '.')
886 7 : continue;
887 :
888 23 : if (*p != '0')
889 : {
890 21 : *p = '0';
891 21 : did_break = true;
892 21 : break;
893 : }
894 : }
895 :
896 21 : if (did_break)
897 : {
898 21 : mpfr_init (r);
899 21 : mpfr_set_str (r, buffer, 10, GFC_RND_MODE);
900 21 : if (negate)
901 0 : mpfr_neg (r, r, GFC_RND_MODE);
902 :
903 21 : mpfr_sub (r, r, e->value.real, GFC_RND_MODE);
904 :
905 21 : if (mpfr_cmp_ui (r, 0) == 0)
906 1 : gfc_warning (OPT_Wconversion_extra, "Non-significant digits "
907 : "in %qs number at %C, maybe incorrect KIND",
908 : gfc_typename (&e->ts));
909 :
910 21 : mpfr_clear (r);
911 : }
912 : }
913 :
914 220118 : *result = e;
915 220118 : return MATCH_YES;
916 :
917 5 : cleanup:
918 5 : gfc_free_expr (e);
919 5 : return MATCH_ERROR;
920 : }
921 :
922 :
923 : /* Match a substring reference. */
924 :
925 : static match
926 616924 : match_substring (gfc_charlen *cl, int init, gfc_ref **result, bool deferred)
927 : {
928 616924 : gfc_expr *start, *end;
929 616924 : locus old_loc;
930 616924 : gfc_ref *ref;
931 616924 : match m;
932 :
933 616924 : start = NULL;
934 616924 : end = NULL;
935 :
936 616924 : old_loc = gfc_current_locus;
937 :
938 616924 : m = gfc_match_char ('(');
939 616924 : if (m != MATCH_YES)
940 : return MATCH_NO;
941 :
942 16919 : if (gfc_match_char (':') != MATCH_YES)
943 : {
944 16041 : if (init)
945 0 : m = gfc_match_init_expr (&start);
946 : else
947 16041 : m = gfc_match_expr (&start);
948 :
949 16041 : if (m != MATCH_YES)
950 : {
951 154 : m = MATCH_NO;
952 154 : goto cleanup;
953 : }
954 :
955 15887 : m = gfc_match_char (':');
956 15887 : if (m != MATCH_YES)
957 460 : goto cleanup;
958 : }
959 :
960 16305 : if (gfc_match_char (')') != MATCH_YES)
961 : {
962 15376 : if (init)
963 0 : m = gfc_match_init_expr (&end);
964 : else
965 15376 : m = gfc_match_expr (&end);
966 :
967 15376 : if (m == MATCH_NO)
968 2 : goto syntax;
969 15374 : if (m == MATCH_ERROR)
970 0 : goto cleanup;
971 :
972 15374 : m = gfc_match_char (')');
973 15374 : if (m == MATCH_NO)
974 3 : goto syntax;
975 : }
976 :
977 : /* Optimize away the (:) reference. */
978 16300 : if (start == NULL && end == NULL && !deferred)
979 : ref = NULL;
980 : else
981 : {
982 16095 : ref = gfc_get_ref ();
983 :
984 16095 : ref->type = REF_SUBSTRING;
985 16095 : if (start == NULL)
986 671 : start = gfc_get_int_expr (gfc_charlen_int_kind, NULL, 1);
987 16095 : ref->u.ss.start = start;
988 16095 : if (end == NULL && cl)
989 722 : end = gfc_copy_expr (cl->length);
990 16095 : ref->u.ss.end = end;
991 16095 : ref->u.ss.length = cl;
992 : }
993 :
994 16300 : *result = ref;
995 16300 : return MATCH_YES;
996 :
997 5 : syntax:
998 5 : gfc_error ("Syntax error in SUBSTRING specification at %C");
999 5 : m = MATCH_ERROR;
1000 :
1001 619 : cleanup:
1002 619 : gfc_free_expr (start);
1003 619 : gfc_free_expr (end);
1004 :
1005 619 : gfc_current_locus = old_loc;
1006 619 : return m;
1007 : }
1008 :
1009 :
1010 : /* Reads the next character of a string constant, taking care to
1011 : return doubled delimiters on the input as a single instance of
1012 : the delimiter.
1013 :
1014 : Special return values for "ret" argument are:
1015 : -1 End of the string, as determined by the delimiter
1016 : -2 Unterminated string detected
1017 :
1018 : Backslash codes are also expanded at this time. */
1019 :
1020 : static gfc_char_t
1021 4277851 : next_string_char (gfc_char_t delimiter, int *ret)
1022 : {
1023 4277851 : locus old_locus;
1024 4277851 : gfc_char_t c;
1025 :
1026 4277851 : c = gfc_next_char_literal (INSTRING_WARN);
1027 4277851 : *ret = 0;
1028 :
1029 4277851 : if (c == '\n')
1030 : {
1031 4 : *ret = -2;
1032 4 : return 0;
1033 : }
1034 :
1035 4277847 : if (flag_backslash && c == '\\')
1036 : {
1037 12180 : old_locus = gfc_current_locus;
1038 :
1039 12180 : if (gfc_match_special_char (&c) == MATCH_NO)
1040 0 : gfc_current_locus = old_locus;
1041 :
1042 12180 : if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings)
1043 0 : gfc_warning (0, "Extension: backslash character at %C");
1044 : }
1045 :
1046 4277847 : if (c != delimiter)
1047 : return c;
1048 :
1049 614800 : old_locus = gfc_current_locus;
1050 614800 : c = gfc_next_char_literal (NONSTRING);
1051 :
1052 614800 : if (c == delimiter)
1053 : return c;
1054 613982 : gfc_current_locus = old_locus;
1055 :
1056 613982 : *ret = -1;
1057 613982 : return 0;
1058 : }
1059 :
1060 :
1061 : /* Special case of gfc_match_name() that matches a parameter kind name
1062 : before a string constant. This takes case of the weird but legal
1063 : case of:
1064 :
1065 : kind_____'string'
1066 :
1067 : where kind____ is a parameter. gfc_match_name() will happily slurp
1068 : up all the underscores, which leads to problems. If we return
1069 : MATCH_YES, the parse pointer points to the final underscore, which
1070 : is not part of the name. We never return MATCH_ERROR-- errors in
1071 : the name will be detected later. */
1072 :
1073 : static match
1074 4448414 : match_charkind_name (char *name)
1075 : {
1076 4448414 : locus old_loc;
1077 4448414 : char c, peek;
1078 4448414 : int len;
1079 :
1080 4448414 : gfc_gobble_whitespace ();
1081 4448414 : c = gfc_next_ascii_char ();
1082 4448414 : if (!ISALPHA (c))
1083 : return MATCH_NO;
1084 :
1085 4041823 : *name++ = c;
1086 4041823 : len = 1;
1087 :
1088 16435175 : for (;;)
1089 : {
1090 16435175 : old_loc = gfc_current_locus;
1091 16435175 : c = gfc_next_ascii_char ();
1092 :
1093 16435175 : if (c == '_')
1094 : {
1095 531191 : peek = gfc_peek_ascii_char ();
1096 :
1097 531191 : if (peek == '\'' || peek == '\"')
1098 : {
1099 996 : gfc_current_locus = old_loc;
1100 996 : *name = '\0';
1101 996 : return MATCH_YES;
1102 : }
1103 : }
1104 :
1105 16434179 : if (!ISALNUM (c)
1106 4571022 : && c != '_'
1107 4040827 : && (c != '$' || !flag_dollar_ok))
1108 : break;
1109 :
1110 12393352 : *name++ = c;
1111 12393352 : if (++len > GFC_MAX_SYMBOL_LEN)
1112 : break;
1113 : }
1114 :
1115 : return MATCH_NO;
1116 : }
1117 :
1118 :
1119 : /* See if the current input matches a character constant. Lots of
1120 : contortions have to be done to match the kind parameter which comes
1121 : before the actual string. The main consideration is that we don't
1122 : want to error out too quickly. For example, we don't actually do
1123 : any validation of the kinds until we have actually seen a legal
1124 : delimiter. Using match_kind_param() generates errors too quickly. */
1125 :
1126 : static match
1127 7118602 : match_string_constant (gfc_expr **result)
1128 : {
1129 7118602 : char name[GFC_MAX_SYMBOL_LEN + 1], peek;
1130 7118602 : size_t length;
1131 7118602 : int kind,save_warn_ampersand, ret;
1132 7118602 : locus old_locus, start_locus;
1133 7118602 : gfc_symbol *sym;
1134 7118602 : gfc_expr *e;
1135 7118602 : match m;
1136 7118602 : gfc_char_t c, delimiter, *p;
1137 :
1138 7118602 : old_locus = gfc_current_locus;
1139 :
1140 7118602 : gfc_gobble_whitespace ();
1141 :
1142 7118602 : c = gfc_next_char ();
1143 7118602 : if (c == '\'' || c == '"')
1144 : {
1145 266561 : kind = gfc_default_character_kind;
1146 266561 : start_locus = gfc_current_locus;
1147 266561 : goto got_delim;
1148 : }
1149 :
1150 6852041 : if (gfc_wide_is_digit (c))
1151 : {
1152 2403627 : kind = 0;
1153 :
1154 5768972 : while (gfc_wide_is_digit (c))
1155 : {
1156 3378797 : kind = kind * 10 + c - '0';
1157 3378797 : if (kind > 9999999)
1158 13452 : goto no_match;
1159 3365345 : c = gfc_next_char ();
1160 : }
1161 :
1162 : }
1163 : else
1164 : {
1165 4448414 : gfc_current_locus = old_locus;
1166 :
1167 4448414 : m = match_charkind_name (name);
1168 4448414 : if (m != MATCH_YES)
1169 4447418 : goto no_match;
1170 :
1171 996 : if (gfc_find_symbol (name, NULL, 1, &sym)
1172 996 : || sym == NULL
1173 1991 : || sym->attr.flavor != FL_PARAMETER)
1174 1 : goto no_match;
1175 :
1176 995 : kind = -1;
1177 995 : c = gfc_next_char ();
1178 : }
1179 :
1180 2391170 : if (c != '_')
1181 2201838 : goto no_match;
1182 :
1183 189332 : c = gfc_next_char ();
1184 189332 : if (c != '\'' && c != '"')
1185 148883 : goto no_match;
1186 :
1187 40449 : start_locus = gfc_current_locus;
1188 :
1189 40449 : if (kind == -1)
1190 : {
1191 995 : if (gfc_extract_int (sym->value, &kind, 1))
1192 : return MATCH_ERROR;
1193 995 : gfc_set_sym_referenced (sym);
1194 : }
1195 :
1196 40449 : if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0)
1197 : {
1198 0 : gfc_error ("Invalid kind %d for CHARACTER constant at %C", kind);
1199 0 : return MATCH_ERROR;
1200 : }
1201 :
1202 40449 : got_delim:
1203 : /* Scan the string into a block of memory by first figuring out how
1204 : long it is, allocating the structure, then re-reading it. This
1205 : isn't particularly efficient, but string constants aren't that
1206 : common in most code. TODO: Use obstacks? */
1207 :
1208 307010 : delimiter = c;
1209 307010 : length = 0;
1210 :
1211 3971184 : for (;;)
1212 : {
1213 2139097 : c = next_string_char (delimiter, &ret);
1214 2139097 : if (ret == -1)
1215 : break;
1216 1832091 : if (ret == -2)
1217 : {
1218 4 : gfc_current_locus = start_locus;
1219 4 : gfc_error ("Unterminated character constant beginning at %C");
1220 4 : return MATCH_ERROR;
1221 : }
1222 :
1223 1832087 : length++;
1224 : }
1225 :
1226 : /* Peek at the next character to see if it is a b, o, z, or x for the
1227 : postfixed BOZ literal constants. */
1228 307006 : peek = gfc_peek_ascii_char ();
1229 307006 : if (peek == 'b' || peek == 'o' || peek =='z' || peek == 'x')
1230 25 : goto no_match;
1231 :
1232 306981 : e = gfc_get_character_expr (kind, &start_locus, NULL, length);
1233 :
1234 306981 : gfc_current_locus = start_locus;
1235 :
1236 : /* We disable the warning for the following loop as the warning has already
1237 : been printed in the loop above. */
1238 306981 : save_warn_ampersand = warn_ampersand;
1239 306981 : warn_ampersand = false;
1240 :
1241 306981 : p = e->value.character.string;
1242 2138754 : for (size_t i = 0; i < length; i++)
1243 : {
1244 1831778 : c = next_string_char (delimiter, &ret);
1245 :
1246 1831778 : if (!gfc_check_character_range (c, kind))
1247 : {
1248 5 : gfc_free_expr (e);
1249 5 : gfc_error ("Character %qs in string at %C is not representable "
1250 : "in character kind %d", gfc_print_wide_char (c), kind);
1251 5 : return MATCH_ERROR;
1252 : }
1253 :
1254 1831773 : *p++ = c;
1255 : }
1256 :
1257 306976 : *p = '\0'; /* TODO: C-style string is for development/debug purposes. */
1258 306976 : warn_ampersand = save_warn_ampersand;
1259 :
1260 306976 : next_string_char (delimiter, &ret);
1261 306976 : if (ret != -1)
1262 0 : gfc_internal_error ("match_string_constant(): Delimiter not found");
1263 :
1264 306976 : if (match_substring (NULL, 0, &e->ref, false) != MATCH_NO)
1265 307 : e->expr_type = EXPR_SUBSTRING;
1266 :
1267 : /* Substrings with constant starting and ending points are eligible as
1268 : designators (F2018, section 9.1). Simplify substrings to make them usable
1269 : e.g. in data statements. */
1270 306976 : if (e->expr_type == EXPR_SUBSTRING
1271 307 : && e->ref && e->ref->type == REF_SUBSTRING
1272 303 : && e->ref->u.ss.start->expr_type == EXPR_CONSTANT
1273 76 : && (e->ref->u.ss.end == NULL
1274 74 : || e->ref->u.ss.end->expr_type == EXPR_CONSTANT))
1275 : {
1276 74 : gfc_expr *res;
1277 74 : ptrdiff_t istart, iend;
1278 74 : size_t length;
1279 74 : bool equal_length = false;
1280 :
1281 : /* Basic checks on substring starting and ending indices. */
1282 74 : if (!gfc_resolve_substring (e->ref, &equal_length))
1283 6 : return MATCH_ERROR;
1284 :
1285 71 : length = e->value.character.length;
1286 71 : istart = gfc_mpz_get_hwi (e->ref->u.ss.start->value.integer);
1287 71 : if (e->ref->u.ss.end == NULL)
1288 : iend = length;
1289 : else
1290 69 : iend = gfc_mpz_get_hwi (e->ref->u.ss.end->value.integer);
1291 :
1292 71 : if (istart <= iend)
1293 : {
1294 66 : if (istart < 1)
1295 : {
1296 2 : gfc_error ("Substring start index (%td) at %L below 1",
1297 2 : istart, &e->ref->u.ss.start->where);
1298 2 : return MATCH_ERROR;
1299 : }
1300 64 : if (iend > (ssize_t) length)
1301 : {
1302 1 : gfc_error ("Substring end index (%td) at %L exceeds string "
1303 1 : "length", iend, &e->ref->u.ss.end->where);
1304 1 : return MATCH_ERROR;
1305 : }
1306 63 : length = iend - istart + 1;
1307 : }
1308 : else
1309 : length = 0;
1310 :
1311 68 : res = gfc_get_constant_expr (BT_CHARACTER, e->ts.kind, &e->where);
1312 68 : res->value.character.string = gfc_get_wide_string (length + 1);
1313 68 : res->value.character.length = length;
1314 68 : if (length > 0)
1315 63 : memcpy (res->value.character.string,
1316 63 : &e->value.character.string[istart - 1],
1317 : length * sizeof (gfc_char_t));
1318 68 : res->value.character.string[length] = '\0';
1319 68 : e = res;
1320 : }
1321 :
1322 306970 : *result = e;
1323 :
1324 306970 : return MATCH_YES;
1325 :
1326 6811617 : no_match:
1327 6811617 : gfc_current_locus = old_locus;
1328 6811617 : return MATCH_NO;
1329 : }
1330 :
1331 :
1332 : /* Match a .true. or .false. Returns 1 if a .true. was found,
1333 : 0 if a .false. was found, and -1 otherwise. */
1334 : static int
1335 4442232 : match_logical_constant_string (void)
1336 : {
1337 4442232 : locus orig_loc = gfc_current_locus;
1338 :
1339 4442232 : gfc_gobble_whitespace ();
1340 4442232 : if (gfc_next_ascii_char () == '.')
1341 : {
1342 56690 : char ch = gfc_next_ascii_char ();
1343 56690 : if (ch == 'f')
1344 : {
1345 28923 : if (gfc_next_ascii_char () == 'a'
1346 28923 : && gfc_next_ascii_char () == 'l'
1347 28923 : && gfc_next_ascii_char () == 's'
1348 28923 : && gfc_next_ascii_char () == 'e'
1349 57846 : && gfc_next_ascii_char () == '.')
1350 : /* Matched ".false.". */
1351 : return 0;
1352 : }
1353 27767 : else if (ch == 't')
1354 : {
1355 27766 : if (gfc_next_ascii_char () == 'r'
1356 27766 : && gfc_next_ascii_char () == 'u'
1357 27766 : && gfc_next_ascii_char () == 'e'
1358 55532 : && gfc_next_ascii_char () == '.')
1359 : /* Matched ".true.". */
1360 : return 1;
1361 : }
1362 : }
1363 4385543 : gfc_current_locus = orig_loc;
1364 4385543 : return -1;
1365 : }
1366 :
1367 : /* Match a .true. or .false. */
1368 :
1369 : static match
1370 4442232 : match_logical_constant (gfc_expr **result)
1371 : {
1372 4442232 : gfc_expr *e;
1373 4442232 : int i, kind, is_iso_c;
1374 :
1375 4442232 : i = match_logical_constant_string ();
1376 4442232 : if (i == -1)
1377 : return MATCH_NO;
1378 :
1379 56689 : kind = get_kind (&is_iso_c);
1380 56689 : if (kind == -1)
1381 : return MATCH_ERROR;
1382 56689 : if (kind == -2)
1383 56200 : kind = gfc_default_logical_kind;
1384 :
1385 56689 : if (gfc_validate_kind (BT_LOGICAL, kind, true) < 0)
1386 : {
1387 4 : gfc_error ("Bad kind for logical constant at %C");
1388 4 : return MATCH_ERROR;
1389 : }
1390 :
1391 56685 : e = gfc_get_logical_expr (kind, &gfc_current_locus, i);
1392 56685 : e->ts.is_c_interop = is_iso_c;
1393 :
1394 56685 : *result = e;
1395 56685 : return MATCH_YES;
1396 : }
1397 :
1398 :
1399 : /* Match a real or imaginary part of a complex constant that is a
1400 : symbolic constant. */
1401 :
1402 : static match
1403 141225 : match_sym_complex_part (gfc_expr **result)
1404 : {
1405 141225 : char name[GFC_MAX_SYMBOL_LEN + 1];
1406 141225 : gfc_symbol *sym;
1407 141225 : gfc_expr *e;
1408 141225 : match m;
1409 :
1410 141225 : m = gfc_match_name (name);
1411 141225 : if (m != MATCH_YES)
1412 : return m;
1413 :
1414 39252 : if (gfc_find_symbol (name, NULL, 1, &sym) || sym == NULL)
1415 : return MATCH_NO;
1416 :
1417 36572 : if (sym->attr.flavor != FL_PARAMETER)
1418 : {
1419 : /* Give the matcher for implied do-loops a chance to run. This yields
1420 : a much saner error message for "write(*,*) (i, i=1, 6" where the
1421 : right parenthesis is missing. */
1422 34983 : char c;
1423 34983 : gfc_gobble_whitespace ();
1424 34983 : c = gfc_peek_ascii_char ();
1425 34983 : if (c == '=' || c == ',')
1426 : {
1427 : m = MATCH_NO;
1428 : }
1429 : else
1430 : {
1431 32131 : gfc_error ("Expected PARAMETER symbol in complex constant at %C");
1432 32131 : m = MATCH_ERROR;
1433 : }
1434 34983 : return m;
1435 : }
1436 :
1437 1589 : if (!sym->value)
1438 2 : goto error;
1439 :
1440 1587 : if (!gfc_numeric_ts (&sym->value->ts))
1441 : {
1442 332 : gfc_error ("Numeric PARAMETER required in complex constant at %C");
1443 332 : return MATCH_ERROR;
1444 : }
1445 :
1446 1255 : if (sym->value->rank != 0)
1447 : {
1448 174 : gfc_error ("Scalar PARAMETER required in complex constant at %C");
1449 174 : return MATCH_ERROR;
1450 : }
1451 :
1452 1081 : if (!gfc_notify_std (GFC_STD_F2003, "PARAMETER symbol in "
1453 : "complex constant at %C"))
1454 : return MATCH_ERROR;
1455 :
1456 1078 : switch (sym->value->ts.type)
1457 : {
1458 68 : case BT_REAL:
1459 68 : e = gfc_copy_expr (sym->value);
1460 68 : break;
1461 :
1462 1 : case BT_COMPLEX:
1463 1 : e = gfc_complex2real (sym->value, sym->value->ts.kind);
1464 1 : if (e == NULL)
1465 0 : goto error;
1466 : break;
1467 :
1468 1007 : case BT_INTEGER:
1469 1007 : e = gfc_int2real (sym->value, gfc_default_real_kind);
1470 1007 : if (e == NULL)
1471 0 : goto error;
1472 : break;
1473 :
1474 2 : case BT_UNSIGNED:
1475 2 : goto error;
1476 :
1477 0 : default:
1478 0 : gfc_internal_error ("gfc_match_sym_complex_part(): Bad type");
1479 : }
1480 :
1481 1076 : *result = e; /* e is a scalar, real, constant expression. */
1482 1076 : return MATCH_YES;
1483 :
1484 4 : error:
1485 4 : gfc_error ("Error converting PARAMETER constant in complex constant at %C");
1486 4 : return MATCH_ERROR;
1487 : }
1488 :
1489 :
1490 : /* Match a real or imaginary part of a complex number. */
1491 :
1492 : static match
1493 141225 : match_complex_part (gfc_expr **result)
1494 : {
1495 141225 : match m;
1496 :
1497 141225 : m = match_sym_complex_part (result);
1498 141225 : if (m != MATCH_NO)
1499 : return m;
1500 :
1501 107505 : m = match_real_constant (result, 1);
1502 107505 : if (m != MATCH_NO)
1503 : return m;
1504 :
1505 93172 : return match_integer_constant (result, 1);
1506 : }
1507 :
1508 :
1509 : /* Try to match a complex constant. */
1510 :
1511 : static match
1512 7128888 : match_complex_constant (gfc_expr **result)
1513 : {
1514 7128888 : gfc_expr *e, *real, *imag;
1515 7128888 : gfc_error_buffer old_error;
1516 7128888 : gfc_typespec target;
1517 7128888 : locus old_loc;
1518 7128888 : int kind;
1519 7128888 : match m;
1520 :
1521 7128888 : old_loc = gfc_current_locus;
1522 7128888 : real = imag = e = NULL;
1523 :
1524 7128888 : m = gfc_match_char ('(');
1525 7128888 : if (m != MATCH_YES)
1526 : return m;
1527 :
1528 130943 : gfc_push_error (&old_error);
1529 :
1530 130943 : m = match_complex_part (&real);
1531 130943 : if (m == MATCH_NO)
1532 : {
1533 74847 : gfc_free_error (&old_error);
1534 74847 : goto cleanup;
1535 : }
1536 :
1537 56096 : if (gfc_match_char (',') == MATCH_NO)
1538 : {
1539 : /* It is possible that gfc_int2real issued a warning when
1540 : converting an integer to real. Throw this away here. */
1541 :
1542 45810 : gfc_clear_warning ();
1543 45810 : gfc_pop_error (&old_error);
1544 45810 : m = MATCH_NO;
1545 45810 : goto cleanup;
1546 : }
1547 :
1548 : /* If m is error, then something was wrong with the real part and we
1549 : assume we have a complex constant because we've seen the ','. An
1550 : ambiguous case here is the start of an iterator list of some
1551 : sort. These sort of lists are matched prior to coming here. */
1552 :
1553 10286 : if (m == MATCH_ERROR)
1554 : {
1555 4 : gfc_free_error (&old_error);
1556 4 : goto cleanup;
1557 : }
1558 10282 : gfc_pop_error (&old_error);
1559 :
1560 10282 : m = match_complex_part (&imag);
1561 10282 : if (m == MATCH_NO)
1562 3123 : goto syntax;
1563 7159 : if (m == MATCH_ERROR)
1564 153 : goto cleanup;
1565 :
1566 7006 : m = gfc_match_char (')');
1567 7006 : if (m == MATCH_NO)
1568 : {
1569 : /* Give the matcher for implied do-loops a chance to run. This
1570 : yields a much saner error message for (/ (i, 4=i, 6) /). */
1571 13 : if (gfc_peek_ascii_char () == '=')
1572 : {
1573 0 : m = MATCH_ERROR;
1574 0 : goto cleanup;
1575 : }
1576 : else
1577 13 : goto syntax;
1578 : }
1579 :
1580 6993 : if (m == MATCH_ERROR)
1581 0 : goto cleanup;
1582 :
1583 : /* Decide on the kind of this complex number. */
1584 6993 : if (real->ts.type == BT_REAL)
1585 : {
1586 6559 : if (imag->ts.type == BT_REAL)
1587 6534 : kind = gfc_kind_max (real, imag);
1588 : else
1589 25 : kind = real->ts.kind;
1590 : }
1591 : else
1592 : {
1593 434 : if (imag->ts.type == BT_REAL)
1594 7 : kind = imag->ts.kind;
1595 : else
1596 427 : kind = gfc_default_real_kind;
1597 : }
1598 6993 : gfc_clear_ts (&target);
1599 6993 : target.type = BT_REAL;
1600 6993 : target.kind = kind;
1601 :
1602 6993 : if (real->ts.type != BT_REAL || kind != real->ts.kind)
1603 435 : gfc_convert_type (real, &target, 2);
1604 6993 : if (imag->ts.type != BT_REAL || kind != imag->ts.kind)
1605 490 : gfc_convert_type (imag, &target, 2);
1606 :
1607 6993 : e = convert_complex (real, imag, kind);
1608 6993 : e->where = gfc_current_locus;
1609 :
1610 6993 : gfc_free_expr (real);
1611 6993 : gfc_free_expr (imag);
1612 :
1613 6993 : *result = e;
1614 6993 : return MATCH_YES;
1615 :
1616 3136 : syntax:
1617 3136 : gfc_error ("Syntax error in COMPLEX constant at %C");
1618 3136 : m = MATCH_ERROR;
1619 :
1620 123950 : cleanup:
1621 123950 : gfc_free_expr (e);
1622 123950 : gfc_free_expr (real);
1623 123950 : gfc_free_expr (imag);
1624 123950 : gfc_current_locus = old_loc;
1625 :
1626 123950 : return m;
1627 7128888 : }
1628 :
1629 :
1630 : /* Match constants in any of several forms. Returns nonzero for a
1631 : match, zero for no match. */
1632 :
1633 : match
1634 7128888 : gfc_match_literal_constant (gfc_expr **result, int signflag)
1635 : {
1636 7128888 : match m;
1637 :
1638 7128888 : m = match_complex_constant (result);
1639 7128888 : if (m != MATCH_NO)
1640 : return m;
1641 :
1642 7118602 : m = match_string_constant (result);
1643 7118602 : if (m != MATCH_NO)
1644 : return m;
1645 :
1646 6811617 : m = match_boz_constant (result);
1647 6811617 : if (m != MATCH_NO)
1648 : return m;
1649 :
1650 6807457 : m = match_real_constant (result, signflag);
1651 6807457 : if (m != MATCH_NO)
1652 : return m;
1653 :
1654 6601657 : m = match_hollerith_constant (result);
1655 6601657 : if (m != MATCH_NO)
1656 : return m;
1657 :
1658 6599021 : if (flag_unsigned)
1659 : {
1660 588996 : m = match_unsigned_constant (result);
1661 588996 : if (m != MATCH_NO)
1662 : return m;
1663 : }
1664 :
1665 6497649 : m = match_integer_constant (result, signflag);
1666 6497649 : if (m != MATCH_NO)
1667 : return m;
1668 :
1669 4442232 : m = match_logical_constant (result);
1670 4442232 : if (m != MATCH_NO)
1671 : return m;
1672 :
1673 : return MATCH_NO;
1674 : }
1675 :
1676 :
1677 : /* This checks if a symbol is the return value of an encompassing function.
1678 : Function nesting can be maximally two levels deep, but we may have
1679 : additional local namespaces like BLOCK etc. */
1680 :
1681 : bool
1682 781740 : gfc_is_function_return_value (gfc_symbol *sym, gfc_namespace *ns)
1683 : {
1684 781740 : if (!sym->attr.function || (sym->result != sym))
1685 : return false;
1686 1639107 : while (ns)
1687 : {
1688 928282 : if (ns->proc_name == sym)
1689 : return true;
1690 916562 : ns = ns->parent;
1691 : }
1692 : return false;
1693 : }
1694 :
1695 :
1696 : /* Match a single actual argument value. An actual argument is
1697 : usually an expression, but can also be a procedure name. If the
1698 : argument is a single name, it is not always possible to tell
1699 : whether the name is a dummy procedure or not. We treat these cases
1700 : by creating an argument that looks like a dummy procedure and
1701 : fixing things later during resolution. */
1702 :
1703 : static match
1704 2019121 : match_actual_arg (gfc_expr **result)
1705 : {
1706 2019121 : char name[GFC_MAX_SYMBOL_LEN + 1];
1707 2019121 : gfc_symtree *symtree;
1708 2019121 : locus where, w;
1709 2019121 : gfc_expr *e;
1710 2019121 : char c;
1711 :
1712 2019121 : gfc_gobble_whitespace ();
1713 2019121 : where = gfc_current_locus;
1714 :
1715 2019121 : switch (gfc_match_name (name))
1716 : {
1717 : case MATCH_ERROR:
1718 : return MATCH_ERROR;
1719 :
1720 : case MATCH_NO:
1721 : break;
1722 :
1723 1319178 : case MATCH_YES:
1724 1319178 : w = gfc_current_locus;
1725 1319178 : gfc_gobble_whitespace ();
1726 1319178 : c = gfc_next_ascii_char ();
1727 1319178 : gfc_current_locus = w;
1728 :
1729 1319178 : if (c != ',' && c != ')')
1730 : break;
1731 :
1732 692591 : if (gfc_find_sym_tree (name, NULL, 1, &symtree))
1733 : break;
1734 : /* Handle error elsewhere. */
1735 :
1736 : /* Eliminate a couple of common cases where we know we don't
1737 : have a function argument. */
1738 692591 : if (symtree == NULL)
1739 : {
1740 14099 : gfc_get_sym_tree (name, NULL, &symtree, false);
1741 14099 : gfc_set_sym_referenced (symtree->n.sym);
1742 : }
1743 : else
1744 : {
1745 678492 : gfc_symbol *sym;
1746 :
1747 678492 : sym = symtree->n.sym;
1748 678492 : gfc_set_sym_referenced (sym);
1749 678492 : if (sym->attr.flavor == FL_NAMELIST)
1750 : {
1751 1141 : gfc_error ("Namelist %qs cannot be an argument at %L",
1752 : sym->name, &where);
1753 1141 : break;
1754 : }
1755 677351 : if (sym->attr.flavor != FL_PROCEDURE
1756 639470 : && sym->attr.flavor != FL_UNKNOWN)
1757 : break;
1758 :
1759 191147 : if (sym->attr.in_common && !sym->attr.proc_pointer)
1760 : {
1761 224 : if (!gfc_add_flavor (&sym->attr, FL_VARIABLE,
1762 : sym->name, &sym->declared_at))
1763 : return MATCH_ERROR;
1764 : break;
1765 : }
1766 :
1767 : /* If the symbol is a function with itself as the result and
1768 : is being defined, then we have a variable. */
1769 190923 : if (sym->attr.function && sym->result == sym)
1770 : {
1771 3777 : if (gfc_is_function_return_value (sym, gfc_current_ns))
1772 : break;
1773 :
1774 3123 : if (sym->attr.entry
1775 55 : && (sym->ns == gfc_current_ns
1776 2 : || sym->ns == gfc_current_ns->parent))
1777 : {
1778 54 : gfc_entry_list *el = NULL;
1779 :
1780 54 : for (el = sym->ns->entries; el; el = el->next)
1781 54 : if (sym == el->sym)
1782 : break;
1783 :
1784 54 : if (el)
1785 : break;
1786 : }
1787 : }
1788 : }
1789 :
1790 204314 : e = gfc_get_expr (); /* Leave it unknown for now */
1791 204314 : e->symtree = symtree;
1792 204314 : e->expr_type = EXPR_VARIABLE;
1793 204314 : e->ts.type = BT_PROCEDURE;
1794 204314 : e->where = where;
1795 :
1796 204314 : *result = e;
1797 204314 : return MATCH_YES;
1798 : }
1799 :
1800 1814807 : gfc_current_locus = where;
1801 1814807 : return gfc_match_expr (result);
1802 : }
1803 :
1804 :
1805 : /* Match a keyword argument or type parameter spec list.. */
1806 :
1807 : static match
1808 2010933 : match_keyword_arg (gfc_actual_arglist *actual, gfc_actual_arglist *base, bool pdt)
1809 : {
1810 2010933 : char name[GFC_MAX_SYMBOL_LEN + 1];
1811 2010933 : gfc_actual_arglist *a;
1812 2010933 : locus name_locus;
1813 2010933 : match m;
1814 :
1815 2010933 : name_locus = gfc_current_locus;
1816 2010933 : m = gfc_match_name (name);
1817 :
1818 2010933 : if (m != MATCH_YES)
1819 590050 : goto cleanup;
1820 1420883 : if (gfc_match_char ('=') != MATCH_YES)
1821 : {
1822 1259913 : m = MATCH_NO;
1823 1259913 : goto cleanup;
1824 : }
1825 :
1826 160970 : if (pdt)
1827 : {
1828 466 : if (gfc_match_char ('*') == MATCH_YES)
1829 : {
1830 86 : actual->spec_type = SPEC_ASSUMED;
1831 86 : goto add_name;
1832 : }
1833 380 : else if (gfc_match_char (':') == MATCH_YES)
1834 : {
1835 55 : actual->spec_type = SPEC_DEFERRED;
1836 55 : goto add_name;
1837 : }
1838 : else
1839 325 : actual->spec_type = SPEC_EXPLICIT;
1840 : }
1841 :
1842 160829 : m = match_actual_arg (&actual->expr);
1843 160829 : if (m != MATCH_YES)
1844 11323 : goto cleanup;
1845 :
1846 : /* Make sure this name has not appeared yet. */
1847 149506 : add_name:
1848 149647 : if (name[0] != '\0')
1849 : {
1850 481706 : for (a = base; a; a = a->next)
1851 332073 : if (a->name != NULL && strcmp (a->name, name) == 0)
1852 : {
1853 14 : gfc_error ("Keyword %qs at %C has already appeared in the "
1854 : "current argument list", name);
1855 14 : return MATCH_ERROR;
1856 : }
1857 : }
1858 :
1859 149633 : actual->name = gfc_get_string ("%s", name);
1860 149633 : return MATCH_YES;
1861 :
1862 1861286 : cleanup:
1863 1861286 : gfc_current_locus = name_locus;
1864 1861286 : return m;
1865 : }
1866 :
1867 :
1868 : /* Match an argument list function, such as %VAL. */
1869 :
1870 : static match
1871 1971941 : match_arg_list_function (gfc_actual_arglist *result)
1872 : {
1873 1971941 : char name[GFC_MAX_SYMBOL_LEN + 1];
1874 1971941 : locus old_locus;
1875 1971941 : match m;
1876 :
1877 1971941 : old_locus = gfc_current_locus;
1878 :
1879 1971941 : if (gfc_match_char ('%') != MATCH_YES)
1880 : {
1881 1971876 : m = MATCH_NO;
1882 1971876 : goto cleanup;
1883 : }
1884 :
1885 65 : m = gfc_match ("%n (", name);
1886 65 : if (m != MATCH_YES)
1887 0 : goto cleanup;
1888 :
1889 65 : if (name[0] != '\0')
1890 : {
1891 65 : switch (name[0])
1892 : {
1893 16 : case 'l':
1894 16 : if (startswith (name, "loc"))
1895 : {
1896 16 : result->name = "%LOC";
1897 16 : break;
1898 : }
1899 : /* FALLTHRU */
1900 12 : case 'r':
1901 12 : if (startswith (name, "ref"))
1902 : {
1903 12 : result->name = "%REF";
1904 12 : break;
1905 : }
1906 : /* FALLTHRU */
1907 37 : case 'v':
1908 37 : if (startswith (name, "val"))
1909 : {
1910 37 : result->name = "%VAL";
1911 37 : break;
1912 : }
1913 : /* FALLTHRU */
1914 0 : default:
1915 0 : m = MATCH_ERROR;
1916 0 : goto cleanup;
1917 : }
1918 : }
1919 :
1920 65 : if (!gfc_notify_std (GFC_STD_GNU, "argument list function at %C"))
1921 : {
1922 1 : m = MATCH_ERROR;
1923 1 : goto cleanup;
1924 : }
1925 :
1926 64 : m = match_actual_arg (&result->expr);
1927 64 : if (m != MATCH_YES)
1928 0 : goto cleanup;
1929 :
1930 64 : if (gfc_match_char (')') != MATCH_YES)
1931 : {
1932 0 : m = MATCH_NO;
1933 0 : goto cleanup;
1934 : }
1935 :
1936 : return MATCH_YES;
1937 :
1938 1971877 : cleanup:
1939 1971877 : gfc_current_locus = old_locus;
1940 1971877 : return m;
1941 : }
1942 :
1943 :
1944 : /* Matches an actual argument list of a function or subroutine, from
1945 : the opening parenthesis to the closing parenthesis. The argument
1946 : list is assumed to allow keyword arguments because we don't know if
1947 : the symbol associated with the procedure has an implicit interface
1948 : or not. We make sure keywords are unique. If sub_flag is set,
1949 : we're matching the argument list of a subroutine.
1950 :
1951 : NOTE: An alternative use for this function is to match type parameter
1952 : spec lists, which are so similar to actual argument lists that the
1953 : machinery can be reused. This use is flagged by the optional argument
1954 : 'pdt'. */
1955 :
1956 : match
1957 2087972 : gfc_match_actual_arglist (int sub_flag, gfc_actual_arglist **argp, bool pdt)
1958 : {
1959 2087972 : gfc_actual_arglist *head, *tail;
1960 2087972 : int seen_keyword;
1961 2087972 : gfc_st_label *label;
1962 2087972 : locus old_loc;
1963 2087972 : match m;
1964 :
1965 2087972 : *argp = tail = NULL;
1966 2087972 : old_loc = gfc_current_locus;
1967 :
1968 2087972 : seen_keyword = 0;
1969 :
1970 2087972 : if (gfc_match_char ('(') == MATCH_NO)
1971 1234866 : return (sub_flag) ? MATCH_YES : MATCH_NO;
1972 :
1973 1453611 : if (gfc_match_char (')') == MATCH_YES)
1974 : return MATCH_YES;
1975 :
1976 1425770 : head = NULL;
1977 :
1978 1425770 : matching_actual_arglist++;
1979 :
1980 2010495 : for (;;)
1981 : {
1982 2010495 : if (head == NULL)
1983 1425770 : head = tail = gfc_get_actual_arglist ();
1984 : else
1985 : {
1986 584725 : tail->next = gfc_get_actual_arglist ();
1987 584725 : tail = tail->next;
1988 : }
1989 :
1990 2010495 : if (sub_flag && !pdt && gfc_match_char ('*') == MATCH_YES)
1991 : {
1992 238 : m = gfc_match_st_label (&label);
1993 238 : if (m == MATCH_NO)
1994 0 : gfc_error ("Expected alternate return label at %C");
1995 238 : if (m != MATCH_YES)
1996 0 : goto cleanup;
1997 :
1998 238 : if (!gfc_notify_std (GFC_STD_F95_OBS, "Alternate-return argument "
1999 : "at %C"))
2000 0 : goto cleanup;
2001 :
2002 238 : tail->label = label;
2003 238 : goto next;
2004 : }
2005 :
2006 2010257 : if (pdt && !seen_keyword)
2007 : {
2008 1497 : if (gfc_match_char (':') == MATCH_YES)
2009 : {
2010 84 : tail->spec_type = SPEC_DEFERRED;
2011 84 : goto next;
2012 : }
2013 1413 : else if (gfc_match_char ('*') == MATCH_YES)
2014 : {
2015 123 : tail->spec_type = SPEC_ASSUMED;
2016 123 : goto next;
2017 : }
2018 : else
2019 1290 : tail->spec_type = SPEC_EXPLICIT;
2020 :
2021 1290 : m = match_keyword_arg (tail, head, pdt);
2022 1290 : if (m == MATCH_YES)
2023 : {
2024 342 : seen_keyword = 1;
2025 342 : goto next;
2026 : }
2027 948 : if (m == MATCH_ERROR)
2028 0 : goto cleanup;
2029 : }
2030 :
2031 : /* After the first keyword argument is seen, the following
2032 : arguments must also have keywords. */
2033 2009708 : if (seen_keyword)
2034 : {
2035 37767 : m = match_keyword_arg (tail, head, pdt);
2036 :
2037 37767 : if (m == MATCH_ERROR)
2038 34 : goto cleanup;
2039 37733 : if (m == MATCH_NO)
2040 : {
2041 1368 : gfc_error ("Missing keyword name in actual argument list at %C");
2042 1368 : goto cleanup;
2043 : }
2044 :
2045 : }
2046 : else
2047 : {
2048 : /* Try an argument list function, like %VAL. */
2049 1971941 : m = match_arg_list_function (tail);
2050 1971941 : if (m == MATCH_ERROR)
2051 1 : goto cleanup;
2052 :
2053 : /* See if we have the first keyword argument. */
2054 1971940 : if (m == MATCH_NO)
2055 : {
2056 1971876 : m = match_keyword_arg (tail, head, false);
2057 1971876 : if (m == MATCH_YES)
2058 : seen_keyword = 1;
2059 1858950 : if (m == MATCH_ERROR)
2060 722 : goto cleanup;
2061 : }
2062 :
2063 1971154 : if (m == MATCH_NO)
2064 : {
2065 : /* Try for a non-keyword argument. */
2066 1858228 : m = match_actual_arg (&tail->expr);
2067 1858228 : if (m == MATCH_ERROR)
2068 1976 : goto cleanup;
2069 1856252 : if (m == MATCH_NO)
2070 19835 : goto syntax;
2071 : }
2072 : }
2073 :
2074 : /* PDT kind expressions are acceptable as initialization expressions.
2075 : However, intrinsics with a KIND argument reject them. Convert the
2076 : expression now by use of the component initializer. */
2077 1985772 : if (tail->expr
2078 1985688 : && tail->expr->expr_type == EXPR_VARIABLE
2079 3971460 : && gfc_expr_attr (tail->expr).pdt_kind)
2080 : {
2081 334 : gfc_ref *ref;
2082 334 : gfc_expr *tmp = NULL;
2083 356 : for (ref = tail->expr->ref; ref; ref = ref->next)
2084 22 : if (!ref->next && ref->type == REF_COMPONENT
2085 22 : && ref->u.c.component->attr.pdt_kind
2086 22 : && ref->u.c.component->initializer)
2087 22 : tmp = gfc_copy_expr (ref->u.c.component->initializer);
2088 334 : if (tmp)
2089 22 : gfc_replace_expr (tail->expr, tmp);
2090 : }
2091 :
2092 1986559 : next:
2093 1986559 : if (gfc_match_char (')') == MATCH_YES)
2094 : break;
2095 593366 : if (gfc_match_char (',') != MATCH_YES)
2096 8641 : goto syntax;
2097 : }
2098 :
2099 1393193 : *argp = head;
2100 1393193 : matching_actual_arglist--;
2101 1393193 : return MATCH_YES;
2102 :
2103 28476 : syntax:
2104 28476 : gfc_error ("Syntax error in argument list at %C");
2105 :
2106 32577 : cleanup:
2107 32577 : gfc_free_actual_arglist (head);
2108 32577 : gfc_current_locus = old_loc;
2109 32577 : matching_actual_arglist--;
2110 32577 : return MATCH_ERROR;
2111 : }
2112 :
2113 :
2114 : /* Used by gfc_match_varspec() to extend the reference list by one
2115 : element. */
2116 :
2117 : static gfc_ref *
2118 741898 : extend_ref (gfc_expr *primary, gfc_ref *tail)
2119 : {
2120 741898 : if (primary->ref == NULL)
2121 673405 : primary->ref = tail = gfc_get_ref ();
2122 68493 : else if (tail == NULL)
2123 : {
2124 : /* Set tail to end of reference chain. */
2125 23 : for (gfc_ref *ref = primary->ref; ref; ref = ref->next)
2126 23 : if (ref->next == NULL)
2127 : {
2128 : tail = ref;
2129 : break;
2130 : }
2131 : }
2132 : else
2133 : {
2134 68479 : tail->next = gfc_get_ref ();
2135 68479 : tail = tail->next;
2136 : }
2137 :
2138 741898 : return tail;
2139 : }
2140 :
2141 :
2142 : /* Used by gfc_match_varspec() to match an inquiry reference. */
2143 :
2144 : bool
2145 4333 : is_inquiry_ref (const char *name, gfc_ref **ref)
2146 : {
2147 4333 : inquiry_type type;
2148 :
2149 4333 : if (name == NULL)
2150 : return false;
2151 :
2152 4333 : if (ref) *ref = NULL;
2153 :
2154 4333 : if (strcmp (name, "re") == 0)
2155 : type = INQUIRY_RE;
2156 2888 : else if (strcmp (name, "im") == 0)
2157 : type = INQUIRY_IM;
2158 1910 : else if (strcmp (name, "kind") == 0)
2159 : type = INQUIRY_KIND;
2160 1403 : else if (strcmp (name, "len") == 0)
2161 : type = INQUIRY_LEN;
2162 : else
2163 : return false;
2164 :
2165 3372 : if (ref)
2166 : {
2167 1893 : *ref = gfc_get_ref ();
2168 1893 : (*ref)->type = REF_INQUIRY;
2169 1893 : (*ref)->u.i = type;
2170 : }
2171 :
2172 : return true;
2173 : }
2174 :
2175 :
2176 : /* Check to see if functions in operator expressions can be resolved now. */
2177 :
2178 : static bool
2179 126 : resolvable_fcns (gfc_expr *e,
2180 : gfc_symbol *sym ATTRIBUTE_UNUSED,
2181 : int *f ATTRIBUTE_UNUSED)
2182 : {
2183 126 : bool p;
2184 126 : gfc_symbol *s;
2185 :
2186 126 : if (e->expr_type != EXPR_FUNCTION)
2187 : return false;
2188 :
2189 54 : s = e && e->symtree && e->symtree->n.sym ? e->symtree->n.sym : NULL;
2190 54 : p = s && (s->attr.use_assoc
2191 54 : || s->attr.host_assoc
2192 54 : || s->attr.if_source == IFSRC_DECL
2193 54 : || s->attr.proc == PROC_INTRINSIC
2194 24 : || gfc_is_intrinsic (s, 0, e->where));
2195 54 : return !p;
2196 : }
2197 :
2198 :
2199 : /* Match any additional specifications associated with the current
2200 : variable like member references or substrings. If equiv_flag is
2201 : set we only match stuff that is allowed inside an EQUIVALENCE
2202 : statement. sub_flag tells whether we expect a type-bound procedure found
2203 : to be a subroutine as part of CALL or a FUNCTION. For procedure pointer
2204 : components, 'ppc_arg' determines whether the PPC may be called (with an
2205 : argument list), or whether it may just be referred to as a pointer. */
2206 :
2207 : match
2208 5098777 : gfc_match_varspec (gfc_expr *primary, int equiv_flag, bool sub_flag,
2209 : bool ppc_arg)
2210 : {
2211 5098777 : char name[GFC_MAX_SYMBOL_LEN + 1];
2212 5098777 : gfc_ref *substring, *tail, *tmp;
2213 5098777 : gfc_component *component = NULL;
2214 5098777 : gfc_component *previous = NULL;
2215 5098777 : gfc_symbol *sym = primary->symtree->n.sym;
2216 5098777 : gfc_expr *tgt_expr = NULL;
2217 5098777 : match m;
2218 5098777 : bool unknown;
2219 5098777 : bool inquiry;
2220 5098777 : bool intrinsic;
2221 5098777 : bool inferred_type;
2222 5098777 : locus old_loc;
2223 5098777 : char peeked_char;
2224 :
2225 5098777 : tail = NULL;
2226 :
2227 5098777 : gfc_gobble_whitespace ();
2228 :
2229 5098777 : if (gfc_peek_ascii_char () == '[')
2230 : {
2231 3224 : if ((sym->ts.type != BT_CLASS && sym->attr.dimension)
2232 3224 : || (sym->ts.type == BT_CLASS && CLASS_DATA (sym)
2233 135 : && CLASS_DATA (sym)->attr.dimension))
2234 : {
2235 0 : gfc_error ("Array section designator, e.g. %<(:)%>, is required "
2236 : "besides the coarray designator %<[...]%> at %C");
2237 0 : return MATCH_ERROR;
2238 : }
2239 3224 : if ((sym->ts.type != BT_CLASS && !sym->attr.codimension)
2240 3223 : || (sym->ts.type == BT_CLASS && CLASS_DATA (sym)
2241 135 : && !CLASS_DATA (sym)->attr.codimension))
2242 : {
2243 1 : gfc_error ("Coarray designator at %C but %qs is not a coarray",
2244 : sym->name);
2245 1 : return MATCH_ERROR;
2246 : }
2247 : }
2248 :
2249 5098776 : if (sym->assoc && sym->assoc->target)
2250 5098776 : tgt_expr = sym->assoc->target;
2251 :
2252 5098776 : inferred_type = IS_INFERRED_TYPE (primary);
2253 :
2254 : /* SELECT TYPE temporaries within an ASSOCIATE block, whose selector has not
2255 : been parsed, can generate errors with array refs.. The SELECT TYPE
2256 : namespace is marked with 'assoc_name_inferred'. During resolution, this is
2257 : detected and gfc_fixup_inferred_type_refs is called. */
2258 5097756 : if (!inferred_type
2259 5097756 : && sym->attr.select_type_temporary
2260 23488 : && sym->ns->assoc_name_inferred
2261 344 : && !sym->attr.select_rank_temporary)
2262 1364 : inferred_type = true;
2263 :
2264 : /* Try to resolve a typebound generic procedure so that the associate name
2265 : has a chance to get a type before being used in a second, nested associate
2266 : statement. Note that a copy is used for resolution so that failure does
2267 : not result in a mutilated selector expression further down the line. */
2268 7136 : if (tgt_expr && !sym->assoc->dangling
2269 7136 : && tgt_expr->ts.type == BT_UNKNOWN
2270 2115 : && tgt_expr->symtree
2271 1676 : && tgt_expr->symtree->n.sym
2272 5098849 : && gfc_expr_attr (tgt_expr).generic
2273 5098849 : && ((sym->ts.type == BT_DERIVED && sym->ts.u.derived->attr.pdt_template)
2274 72 : || (sym->ts.type == BT_CLASS
2275 0 : && CLASS_DATA (sym)->ts.u.derived->attr.pdt_template)))
2276 : {
2277 1 : gfc_expr *cpy = gfc_copy_expr (tgt_expr);
2278 1 : if (gfc_resolve_expr (cpy)
2279 1 : && cpy->ts.type != BT_UNKNOWN)
2280 : {
2281 1 : gfc_replace_expr (tgt_expr, cpy);
2282 1 : sym->ts = tgt_expr->ts;
2283 : }
2284 : else
2285 0 : gfc_free_expr (cpy);
2286 1 : if (gfc_expr_attr (tgt_expr).generic)
2287 5098776 : inferred_type = true;
2288 : }
2289 :
2290 : /* For associate names, we may not yet know whether they are arrays or not.
2291 : If the selector expression is unambiguously an array; eg. a full array
2292 : or an array section, then the associate name must be an array and we can
2293 : fix it now. Otherwise, if parentheses follow and it is not a character
2294 : type, we have to assume that it actually is one for now. The final
2295 : decision will be made at resolution, of course. */
2296 5098776 : if (sym->assoc
2297 30624 : && gfc_peek_ascii_char () == '('
2298 9655 : && sym->ts.type != BT_CLASS
2299 5108228 : && !sym->attr.dimension)
2300 : {
2301 410 : gfc_ref *ref = NULL;
2302 :
2303 410 : if (!sym->assoc->dangling && tgt_expr)
2304 : {
2305 350 : if (tgt_expr->expr_type == EXPR_VARIABLE)
2306 21 : gfc_resolve_expr (tgt_expr);
2307 :
2308 350 : ref = tgt_expr->ref;
2309 364 : for (; ref; ref = ref->next)
2310 14 : if (ref->type == REF_ARRAY
2311 7 : && (ref->u.ar.type == AR_FULL
2312 7 : || ref->u.ar.type == AR_SECTION))
2313 : break;
2314 : }
2315 :
2316 410 : if (ref || (!(sym->assoc->dangling || sym->ts.type == BT_CHARACTER)
2317 260 : && sym->assoc->st
2318 260 : && sym->assoc->st->n.sym
2319 260 : && sym->assoc->st->n.sym->attr.dimension == 0))
2320 : {
2321 260 : sym->attr.dimension = 1;
2322 260 : if (sym->as == NULL
2323 260 : && sym->assoc->st
2324 260 : && sym->assoc->st->n.sym
2325 260 : && sym->assoc->st->n.sym->as)
2326 0 : sym->as = gfc_copy_array_spec (sym->assoc->st->n.sym->as);
2327 : }
2328 : }
2329 5098366 : else if (sym->ts.type == BT_CLASS
2330 44792 : && !(sym->assoc && sym->assoc->ar)
2331 44720 : && tgt_expr
2332 272 : && tgt_expr->expr_type == EXPR_VARIABLE
2333 146 : && sym->ts.u.derived != tgt_expr->ts.u.derived)
2334 : {
2335 19 : gfc_resolve_expr (tgt_expr);
2336 19 : if (tgt_expr->rank)
2337 0 : sym->ts.u.derived = tgt_expr->ts.u.derived;
2338 : }
2339 :
2340 5098776 : peeked_char = gfc_peek_ascii_char ();
2341 1364 : if ((inferred_type && !sym->as && peeked_char == '(')
2342 5098555 : || (equiv_flag && peeked_char == '(') || peeked_char == '['
2343 5093761 : || sym->attr.codimension
2344 5076176 : || (sym->attr.dimension && sym->ts.type != BT_CLASS
2345 632967 : && !sym->attr.proc_pointer && !gfc_is_proc_ptr_comp (primary)
2346 632952 : && !(gfc_matching_procptr_assignment
2347 38 : && sym->attr.flavor == FL_PROCEDURE))
2348 9542026 : || (sym->ts.type == BT_CLASS && sym->attr.class_ok
2349 44609 : && sym->ts.u.derived && CLASS_DATA (sym)
2350 44605 : && (CLASS_DATA (sym)->attr.dimension
2351 27206 : || CLASS_DATA (sym)->attr.codimension)))
2352 : {
2353 673408 : gfc_array_spec *as;
2354 20673 : bool coarray_only = sym->attr.codimension && !sym->attr.dimension
2355 683912 : && sym->ts.type == BT_CHARACTER;
2356 673408 : gfc_ref *ref, *strarr = NULL;
2357 :
2358 673408 : tail = extend_ref (primary, tail);
2359 673408 : if (sym->ts.type == BT_CHARACTER && tail->type == REF_SUBSTRING)
2360 : {
2361 3 : gcc_assert (sym->attr.dimension);
2362 : /* Find array reference for substrings of character arrays. */
2363 3 : for (ref = primary->ref; ref && ref->next; ref = ref->next)
2364 3 : if (ref->type == REF_ARRAY && ref->next->type == REF_SUBSTRING)
2365 : {
2366 : strarr = ref;
2367 : break;
2368 : }
2369 : }
2370 : else
2371 673405 : tail->type = REF_ARRAY;
2372 :
2373 : /* In EQUIVALENCE, we don't know yet whether we are seeing
2374 : an array, character variable or array of character
2375 : variables. We'll leave the decision till resolve time. */
2376 :
2377 673408 : if (equiv_flag)
2378 : as = NULL;
2379 671407 : else if (sym->ts.type == BT_CLASS && CLASS_DATA (sym))
2380 18018 : as = CLASS_DATA (sym)->as;
2381 : else
2382 653389 : as = sym->as;
2383 :
2384 673408 : ref = strarr ? strarr : tail;
2385 673408 : m = gfc_match_array_ref (&ref->u.ar, as, equiv_flag, as ? as->corank : 0,
2386 : coarray_only);
2387 673408 : if (m != MATCH_YES)
2388 : return m;
2389 :
2390 673316 : gfc_gobble_whitespace ();
2391 673316 : if (coarray_only)
2392 : {
2393 2011 : primary->ts = sym->ts;
2394 2011 : goto check_substring;
2395 : }
2396 :
2397 671305 : if (equiv_flag && gfc_peek_ascii_char () == '(')
2398 : {
2399 74 : tail = extend_ref (primary, tail);
2400 74 : tail->type = REF_ARRAY;
2401 :
2402 74 : m = gfc_match_array_ref (&tail->u.ar, NULL, equiv_flag, 0);
2403 74 : if (m != MATCH_YES)
2404 : return m;
2405 : }
2406 : }
2407 :
2408 5096673 : primary->ts = sym->ts;
2409 :
2410 5096673 : if (equiv_flag)
2411 : return MATCH_YES;
2412 :
2413 : /* With DEC extensions, member separator may be '.' or '%'. */
2414 5093727 : peeked_char = gfc_peek_ascii_char ();
2415 5093727 : m = gfc_match_member_sep (sym);
2416 5093727 : if (m == MATCH_ERROR)
2417 : return MATCH_ERROR;
2418 :
2419 5093726 : inquiry = false;
2420 5093726 : if (m == MATCH_YES && peeked_char == '%' && primary->ts.type != BT_CLASS
2421 134313 : && (primary->ts.type != BT_DERIVED || inferred_type))
2422 : {
2423 2435 : match mm;
2424 2435 : old_loc = gfc_current_locus;
2425 2435 : mm = gfc_match_name (name);
2426 :
2427 : /* Check to see if this has a default complex. */
2428 523 : if (sym->ts.type == BT_UNKNOWN && tgt_expr == NULL
2429 2454 : && gfc_get_default_type (sym->name, sym->ns)->type != BT_UNKNOWN)
2430 : {
2431 7 : gfc_set_default_type (sym, 0, sym->ns);
2432 7 : primary->ts = sym->ts;
2433 : }
2434 :
2435 : /* This is a usable inquiry reference, if the symbol is already known
2436 : to have a type or no derived types with a component of this name
2437 : can be found. If this was an inquiry reference with the same name
2438 : as a derived component and the associate-name type is not derived
2439 : or class, this is fixed up in 'gfc_fixup_inferred_type_refs'. */
2440 2435 : if (mm == MATCH_YES && is_inquiry_ref (name, NULL)
2441 4148 : && !(sym->ts.type == BT_UNKNOWN
2442 234 : && gfc_find_derived_types (sym, gfc_current_ns, name)))
2443 : inquiry = true;
2444 2435 : gfc_current_locus = old_loc;
2445 : }
2446 :
2447 : /* Use the default type if there is one. */
2448 2692543 : if (sym->ts.type == BT_UNKNOWN && m == MATCH_YES
2449 5094242 : && gfc_get_default_type (sym->name, sym->ns)->type == BT_DERIVED)
2450 0 : gfc_set_default_type (sym, 0, sym->ns);
2451 :
2452 : /* See if the type can be determined by resolution of the selector expression,
2453 : if allowable now, or inferred from references. */
2454 5093726 : if ((sym->ts.type == BT_UNKNOWN || inferred_type)
2455 2693613 : && m == MATCH_YES)
2456 : {
2457 1375 : bool sym_present, resolved = false;
2458 1375 : gfc_symbol *tgt_sym;
2459 :
2460 1375 : sym_present = tgt_expr && tgt_expr->symtree && tgt_expr->symtree->n.sym;
2461 1375 : tgt_sym = sym_present ? tgt_expr->symtree->n.sym : NULL;
2462 :
2463 : /* These target expressions can be resolved at any time:
2464 : (i) With a declared symbol or intrinsic function; or
2465 : (ii) An operator expression,
2466 : just as long as (iii) all the functions in the expression have been
2467 : declared or are intrinsic. */
2468 1375 : if (((sym_present // (i)
2469 995 : && (tgt_sym->attr.use_assoc
2470 995 : || tgt_sym->attr.host_assoc
2471 995 : || tgt_sym->attr.if_source == IFSRC_DECL
2472 995 : || tgt_sym->attr.proc == PROC_INTRINSIC
2473 995 : || gfc_is_intrinsic (tgt_sym, 0, tgt_expr->where)))
2474 1363 : || (tgt_expr && tgt_expr->expr_type == EXPR_OP)) // (ii)
2475 24 : && !gfc_traverse_expr (tgt_expr, NULL, resolvable_fcns, 0) // (iii)
2476 18 : && gfc_resolve_expr (tgt_expr))
2477 : {
2478 18 : sym->ts = tgt_expr->ts;
2479 18 : primary->ts = sym->ts;
2480 18 : resolved = true;
2481 : }
2482 :
2483 : /* If this hasn't done the trick and the target expression is a function,
2484 : or an unresolved operator expression, then this must be a derived type
2485 : if 'name' matches an accessible type both in this namespace and in the
2486 : as yet unparsed contained function. In principle, the type could have
2487 : already been inferred to be complex and yet a derived type with a
2488 : component name 're' or 'im' could be found. */
2489 18 : if (tgt_expr
2490 1019 : && (tgt_expr->expr_type == EXPR_FUNCTION
2491 85 : || tgt_expr->expr_type == EXPR_ARRAY
2492 73 : || (!resolved && tgt_expr->expr_type == EXPR_OP))
2493 952 : && (sym->ts.type == BT_UNKNOWN
2494 467 : || (inferred_type && sym->ts.type != BT_COMPLEX))
2495 2189 : && gfc_find_derived_types (sym, gfc_current_ns, name, true))
2496 : {
2497 616 : sym->assoc->inferred_type = 1;
2498 : /* The first returned type is as good as any at this stage. The final
2499 : determination is made in 'gfc_fixup_inferred_type_refs'*/
2500 616 : gfc_symbol **dts = &sym->assoc->derived_types;
2501 616 : tgt_expr->ts.type = BT_DERIVED;
2502 616 : tgt_expr->ts.kind = 0;
2503 616 : tgt_expr->ts.u.derived = *dts;
2504 616 : sym->ts = tgt_expr->ts;
2505 616 : primary->ts = sym->ts;
2506 : /* Delete the dt list even if this process has to be done again for
2507 : another primary expression. */
2508 1254 : while (*dts && (*dts)->dt_next)
2509 : {
2510 638 : gfc_symbol **tmp = &(*dts)->dt_next;
2511 638 : *dts = NULL;
2512 638 : dts = tmp;
2513 : }
2514 : }
2515 : /* If there is a usable inquiry reference not there are no matching
2516 : derived types, force the inquiry reference by setting unknown the
2517 : type of the primary expression. */
2518 354 : else if (inquiry && (sym->ts.type == BT_DERIVED && inferred_type)
2519 807 : && !gfc_find_derived_types (sym, gfc_current_ns, name))
2520 48 : primary->ts.type = BT_UNKNOWN;
2521 :
2522 : /* Otherwise try resolving a copy of a component call. If it succeeds,
2523 : use that for the selector expression. */
2524 711 : else if (tgt_expr && tgt_expr->expr_type == EXPR_COMPCALL)
2525 : {
2526 1 : gfc_expr *cpy = gfc_copy_expr (tgt_expr);
2527 1 : if (gfc_resolve_expr (cpy))
2528 : {
2529 1 : gfc_replace_expr (tgt_expr, cpy);
2530 1 : sym->ts = tgt_expr->ts;
2531 : }
2532 : else
2533 0 : gfc_free_expr (cpy);
2534 : }
2535 :
2536 : /* An inquiry reference might determine the type, otherwise we have an
2537 : error. */
2538 1375 : if (sym->ts.type == BT_UNKNOWN && !inquiry)
2539 : {
2540 12 : gfc_error ("Symbol %qs at %C has no IMPLICIT type", sym->name);
2541 12 : return MATCH_ERROR;
2542 : }
2543 : }
2544 5092351 : else if ((sym->ts.type != BT_DERIVED && sym->ts.type != BT_CLASS)
2545 4859186 : && m == MATCH_YES && !inquiry)
2546 : {
2547 7 : gfc_error ("Unexpected %<%c%> for nonderived-type variable %qs at %C",
2548 : peeked_char, sym->name);
2549 7 : return MATCH_ERROR;
2550 : }
2551 :
2552 5093707 : if ((sym->ts.type != BT_DERIVED && sym->ts.type != BT_CLASS && !inquiry)
2553 235581 : || m != MATCH_YES)
2554 4939720 : goto check_substring;
2555 :
2556 153987 : if (!inquiry)
2557 152580 : sym = sym->ts.u.derived;
2558 : else
2559 : sym = NULL;
2560 :
2561 178740 : for (;;)
2562 : {
2563 178740 : bool t;
2564 178740 : gfc_symtree *tbp;
2565 178740 : gfc_typespec *ts = &primary->ts;
2566 :
2567 178740 : m = gfc_match_name (name);
2568 178740 : if (m == MATCH_NO)
2569 0 : gfc_error ("Expected structure component name at %C");
2570 178740 : if (m != MATCH_YES)
2571 135 : return MATCH_ERROR;
2572 :
2573 : /* For derived type components find typespec of ultimate component. */
2574 178740 : if (ts->type == BT_DERIVED && primary->ref)
2575 : {
2576 148361 : for (gfc_ref *ref = primary->ref; ref; ref = ref->next)
2577 : {
2578 85371 : if (ref->type == REF_COMPONENT && ref->u.c.component)
2579 24866 : ts = &ref->u.c.component->ts;
2580 : }
2581 : }
2582 :
2583 178740 : intrinsic = false;
2584 178740 : if (ts->type != BT_CLASS && ts->type != BT_DERIVED)
2585 : {
2586 1886 : inquiry = is_inquiry_ref (name, &tmp);
2587 1886 : if (inquiry)
2588 1881 : sym = NULL;
2589 :
2590 1886 : if (peeked_char == '%')
2591 : {
2592 1886 : if (tmp)
2593 : {
2594 1881 : gfc_symbol *s;
2595 1881 : switch (tmp->u.i)
2596 : {
2597 1338 : case INQUIRY_RE:
2598 1338 : case INQUIRY_IM:
2599 1338 : if (!gfc_notify_std (GFC_STD_F2008,
2600 : "RE or IM part_ref at %C"))
2601 : return MATCH_ERROR;
2602 : break;
2603 :
2604 288 : case INQUIRY_KIND:
2605 288 : if (!gfc_notify_std (GFC_STD_F2003,
2606 : "KIND part_ref at %C"))
2607 : return MATCH_ERROR;
2608 : break;
2609 :
2610 255 : case INQUIRY_LEN:
2611 255 : if (!gfc_notify_std (GFC_STD_F2003, "LEN part_ref at %C"))
2612 : return MATCH_ERROR;
2613 : break;
2614 : }
2615 :
2616 : /* If necessary, infer the type of the primary expression
2617 : and the associate-name using the the inquiry ref.. */
2618 1872 : s = primary->symtree ? primary->symtree->n.sym : NULL;
2619 1844 : if (s && s->assoc && s->assoc->target
2620 354 : && (s->ts.type == BT_UNKNOWN
2621 210 : || (primary->ts.type == BT_UNKNOWN
2622 48 : && s->assoc->inferred_type
2623 48 : && s->ts.type == BT_DERIVED)))
2624 : {
2625 192 : if (tmp->u.i == INQUIRY_RE || tmp->u.i == INQUIRY_IM)
2626 : {
2627 96 : s->ts.type = BT_COMPLEX;
2628 96 : s->ts.kind = gfc_default_real_kind;;
2629 96 : s->assoc->inferred_type = 1;
2630 96 : primary->ts = s->ts;
2631 : }
2632 96 : else if (tmp->u.i == INQUIRY_LEN)
2633 : {
2634 48 : s->ts.type = BT_CHARACTER;
2635 48 : s->ts.kind = gfc_default_character_kind;;
2636 48 : s->assoc->inferred_type = 1;
2637 48 : primary->ts = s->ts;
2638 : }
2639 48 : else if (s->ts.type == BT_UNKNOWN)
2640 : {
2641 : /* KIND inquiry gives no clue as to symbol type. */
2642 48 : primary->ref = tmp;
2643 48 : primary->ts.type = BT_INTEGER;
2644 48 : primary->ts.kind = gfc_default_integer_kind;
2645 48 : return MATCH_YES;
2646 : }
2647 : }
2648 :
2649 1824 : if ((tmp->u.i == INQUIRY_RE || tmp->u.i == INQUIRY_IM)
2650 1334 : && primary->ts.type != BT_COMPLEX)
2651 : {
2652 12 : gfc_error ("The RE or IM part_ref at %C must be "
2653 : "applied to a COMPLEX expression");
2654 12 : return MATCH_ERROR;
2655 : }
2656 1812 : else if (tmp->u.i == INQUIRY_LEN
2657 253 : && ts->type != BT_CHARACTER)
2658 : {
2659 5 : gfc_error ("The LEN part_ref at %C must be applied "
2660 : "to a CHARACTER expression");
2661 5 : return MATCH_ERROR;
2662 : }
2663 : }
2664 1812 : if (primary->ts.type != BT_UNKNOWN)
2665 178666 : intrinsic = true;
2666 : }
2667 : }
2668 : else
2669 : inquiry = false;
2670 :
2671 178666 : if (sym && sym->f2k_derived)
2672 174055 : tbp = gfc_find_typebound_proc (sym, &t, name, false, &gfc_current_locus);
2673 : else
2674 : tbp = NULL;
2675 :
2676 174055 : if (tbp)
2677 : {
2678 4130 : gfc_symbol* tbp_sym;
2679 :
2680 4130 : if (!t)
2681 : return MATCH_ERROR;
2682 :
2683 4128 : gcc_assert (!tail || !tail->next);
2684 :
2685 4128 : if (!(primary->expr_type == EXPR_VARIABLE
2686 : || (primary->expr_type == EXPR_STRUCTURE
2687 1 : && primary->symtree && primary->symtree->n.sym
2688 1 : && primary->symtree->n.sym->attr.flavor)))
2689 : return MATCH_ERROR;
2690 :
2691 4126 : if (tbp->n.tb->is_generic)
2692 : tbp_sym = NULL;
2693 : else
2694 3290 : tbp_sym = tbp->n.tb->u.specific->n.sym;
2695 :
2696 4126 : primary->expr_type = EXPR_COMPCALL;
2697 4126 : primary->value.compcall.tbp = tbp->n.tb;
2698 4126 : primary->value.compcall.name = tbp->name;
2699 4126 : primary->value.compcall.ignore_pass = 0;
2700 4126 : primary->value.compcall.assign = 0;
2701 4126 : primary->value.compcall.base_object = NULL;
2702 4126 : gcc_assert (primary->symtree->n.sym->attr.referenced);
2703 4126 : if (tbp_sym)
2704 3290 : primary->ts = tbp_sym->ts;
2705 : else
2706 836 : gfc_clear_ts (&primary->ts);
2707 :
2708 4126 : m = gfc_match_actual_arglist (tbp->n.tb->subroutine,
2709 : &primary->value.compcall.actual);
2710 4126 : if (m == MATCH_ERROR)
2711 : return MATCH_ERROR;
2712 4126 : if (m == MATCH_NO)
2713 : {
2714 180 : if (sub_flag)
2715 179 : primary->value.compcall.actual = NULL;
2716 : else
2717 : {
2718 : /* Before erroring, check whether there is also a data
2719 : component with this name. Use noaccess=true so
2720 : that private components are also found. */
2721 1 : if (sym && gfc_find_component (sym, name, true, true, NULL))
2722 : {
2723 : /* Restore expr to EXPR_VARIABLE and let the data
2724 : component path below handle it. */
2725 0 : primary->expr_type = EXPR_VARIABLE;
2726 0 : gfc_free_actual_arglist (primary->value.compcall.actual);
2727 0 : primary->value.compcall.actual = NULL;
2728 0 : tbp = NULL;
2729 0 : goto try_data_component;
2730 : }
2731 1 : gfc_error ("Expected argument list at %C");
2732 1 : return MATCH_ERROR;
2733 : }
2734 : }
2735 :
2736 153852 : break;
2737 : }
2738 :
2739 169925 : try_data_component:
2740 :
2741 174536 : previous = component;
2742 :
2743 174536 : if (!inquiry && !intrinsic)
2744 : {
2745 172726 : component = gfc_find_component (sym, name, false, false, &tmp);
2746 : /* For inferred-type ASSOCIATE names the parse-time candidate type
2747 : may not be the final type; a private component in the candidate
2748 : type may correspond to a public component in the correct type.
2749 : Accept it tentatively so that resolution can fix up the type. */
2750 172726 : if (!component && !tbp
2751 47 : && primary->symtree && primary->symtree->n.sym->assoc
2752 0 : && primary->symtree->n.sym->assoc->inferred_type)
2753 0 : component = gfc_find_component (sym, name, true, false, &tmp);
2754 : }
2755 : else
2756 : component = NULL;
2757 :
2758 174536 : if (previous && inquiry
2759 415 : && (previous->attr.pdt_kind || previous->attr.pdt_len))
2760 : {
2761 4 : gfc_error_now ("R901: A type parameter ref is not a designator and "
2762 : "cannot be followed by the type inquiry ref at %C");
2763 4 : return MATCH_ERROR;
2764 : }
2765 :
2766 174532 : if (intrinsic && !inquiry)
2767 : {
2768 3 : if (previous)
2769 2 : gfc_error ("%qs at %C is not an inquiry reference to an intrinsic "
2770 : "type component %qs", name, previous->name);
2771 : else
2772 1 : gfc_error ("%qs at %C is not an inquiry reference to an intrinsic "
2773 : "type component", name);
2774 3 : return MATCH_ERROR;
2775 : }
2776 174529 : else if (component == NULL && !inquiry)
2777 : return MATCH_ERROR;
2778 :
2779 : /* Extend the reference chain determined by gfc_find_component or
2780 : is_inquiry_ref. */
2781 174482 : if (primary->ref == NULL)
2782 104375 : primary->ref = tmp;
2783 : else
2784 : {
2785 : /* Find end of reference chain if inquiry reference and tail not
2786 : set. */
2787 70107 : if (tail == NULL && inquiry && tmp)
2788 11 : tail = extend_ref (primary, tail);
2789 :
2790 : /* Set by the for loop below for the last component ref. */
2791 70107 : gcc_assert (tail != NULL);
2792 70107 : tail->next = tmp;
2793 : }
2794 :
2795 : /* The reference chain may be longer than one hop for union
2796 : subcomponents; find the new tail. */
2797 176458 : for (tail = tmp; tail->next; tail = tail->next)
2798 : ;
2799 :
2800 174482 : if (tmp && tmp->type == REF_INQUIRY)
2801 : {
2802 1803 : if (!primary->where.u.lb || !primary->where.nextc)
2803 1619 : primary->where = gfc_current_locus;
2804 1803 : gfc_simplify_expr (primary, 0);
2805 :
2806 1803 : if (primary->expr_type == EXPR_CONSTANT)
2807 354 : goto check_done;
2808 :
2809 1449 : if (primary->ref == NULL)
2810 60 : goto check_done;
2811 :
2812 1389 : switch (tmp->u.i)
2813 : {
2814 1178 : case INQUIRY_RE:
2815 1178 : case INQUIRY_IM:
2816 1178 : if (!gfc_notify_std (GFC_STD_F2008, "RE or IM part_ref at %C"))
2817 : return MATCH_ERROR;
2818 :
2819 1178 : if (primary->ts.type != BT_COMPLEX)
2820 : {
2821 0 : gfc_error ("The RE or IM part_ref at %C must be "
2822 : "applied to a COMPLEX expression");
2823 0 : return MATCH_ERROR;
2824 : }
2825 1178 : primary->ts.type = BT_REAL;
2826 1178 : break;
2827 :
2828 159 : case INQUIRY_LEN:
2829 159 : if (!gfc_notify_std (GFC_STD_F2003, "LEN part_ref at %C"))
2830 : return MATCH_ERROR;
2831 :
2832 159 : if (primary->ts.type != BT_CHARACTER)
2833 : {
2834 0 : gfc_error ("The LEN part_ref at %C must be applied "
2835 : "to a CHARACTER expression");
2836 0 : return MATCH_ERROR;
2837 : }
2838 159 : primary->ts.u.cl = NULL;
2839 159 : primary->ts.type = BT_INTEGER;
2840 159 : primary->ts.kind = gfc_default_integer_kind;
2841 159 : break;
2842 :
2843 52 : case INQUIRY_KIND:
2844 52 : if (!gfc_notify_std (GFC_STD_F2003, "KIND part_ref at %C"))
2845 : return MATCH_ERROR;
2846 :
2847 52 : if (primary->ts.type == BT_CLASS
2848 52 : || primary->ts.type == BT_DERIVED)
2849 : {
2850 0 : gfc_error ("The KIND part_ref at %C must be applied "
2851 : "to an expression of intrinsic type");
2852 0 : return MATCH_ERROR;
2853 : }
2854 52 : primary->ts.type = BT_INTEGER;
2855 52 : primary->ts.kind = gfc_default_integer_kind;
2856 52 : break;
2857 :
2858 0 : default:
2859 0 : gcc_unreachable ();
2860 : }
2861 :
2862 1389 : goto check_done;
2863 : }
2864 :
2865 172679 : primary->ts = component->ts;
2866 :
2867 172679 : if (component->attr.proc_pointer && ppc_arg)
2868 : {
2869 : /* Procedure pointer component call: Look for argument list. */
2870 1093 : m = gfc_match_actual_arglist (sub_flag,
2871 : &primary->value.compcall.actual);
2872 1093 : if (m == MATCH_ERROR)
2873 : return MATCH_ERROR;
2874 :
2875 1093 : if (m == MATCH_NO && !gfc_matching_ptr_assignment
2876 272 : && !gfc_matching_procptr_assignment && !matching_actual_arglist)
2877 : {
2878 2 : gfc_error ("Procedure pointer component %qs requires an "
2879 : "argument list at %C", component->name);
2880 2 : return MATCH_ERROR;
2881 : }
2882 :
2883 1091 : if (m == MATCH_YES)
2884 820 : primary->expr_type = EXPR_PPC;
2885 :
2886 : break;
2887 : }
2888 :
2889 171586 : if (component->as != NULL && !component->attr.proc_pointer)
2890 : {
2891 63336 : tail = extend_ref (primary, tail);
2892 63336 : tail->type = REF_ARRAY;
2893 :
2894 126672 : m = gfc_match_array_ref (&tail->u.ar, component->as, equiv_flag,
2895 63336 : component->as->corank);
2896 63336 : if (m != MATCH_YES)
2897 : return m;
2898 : }
2899 108250 : else if (component->ts.type == BT_CLASS && component->attr.class_ok
2900 10652 : && CLASS_DATA (component)->as && !component->attr.proc_pointer)
2901 : {
2902 5069 : tail = extend_ref (primary, tail);
2903 5069 : tail->type = REF_ARRAY;
2904 :
2905 10138 : m = gfc_match_array_ref (&tail->u.ar, CLASS_DATA (component)->as,
2906 : equiv_flag,
2907 5069 : CLASS_DATA (component)->as->corank);
2908 5069 : if (m != MATCH_YES)
2909 : return m;
2910 : }
2911 :
2912 103181 : check_done:
2913 : /* In principle, we could have eg. expr%re%kind so we must allow for
2914 : this possibility. */
2915 173389 : if (gfc_match_char ('%') == MATCH_YES)
2916 : {
2917 24383 : if (component && (component->ts.type == BT_DERIVED
2918 3298 : || component->ts.type == BT_CLASS))
2919 23908 : sym = component->ts.u.derived;
2920 24383 : continue;
2921 : }
2922 149006 : else if (inquiry)
2923 : break;
2924 :
2925 137343 : if ((component->ts.type != BT_DERIVED && component->ts.type != BT_CLASS)
2926 155032 : || gfc_match_member_sep (component->ts.u.derived) != MATCH_YES)
2927 : break;
2928 :
2929 370 : if (component->ts.type == BT_DERIVED || component->ts.type == BT_CLASS)
2930 370 : sym = component->ts.u.derived;
2931 : }
2932 :
2933 5095583 : check_substring:
2934 5095583 : unknown = false;
2935 5095583 : if (primary->ts.type == BT_UNKNOWN && !gfc_fl_struct (sym->attr.flavor))
2936 : {
2937 2692027 : if (gfc_get_default_type (sym->name, sym->ns)->type == BT_CHARACTER)
2938 : {
2939 352 : gfc_set_default_type (sym, 0, sym->ns);
2940 352 : primary->ts = sym->ts;
2941 352 : unknown = true;
2942 : }
2943 : }
2944 :
2945 5095583 : if (primary->ts.type == BT_CHARACTER)
2946 : {
2947 308499 : bool def = primary->ts.deferred == 1;
2948 308499 : switch (match_substring (primary->ts.u.cl, equiv_flag, &substring, def))
2949 : {
2950 15012 : case MATCH_YES:
2951 15012 : if (tail == NULL)
2952 9835 : primary->ref = substring;
2953 : else
2954 5177 : tail->next = substring;
2955 :
2956 15012 : if (primary->expr_type == EXPR_CONSTANT)
2957 755 : primary->expr_type = EXPR_SUBSTRING;
2958 :
2959 15012 : if (substring)
2960 14832 : primary->ts.u.cl = NULL;
2961 :
2962 15012 : gfc_gobble_whitespace ();
2963 15012 : if (gfc_peek_ascii_char () == '(')
2964 : {
2965 5 : gfc_error_now ("Unexpected array/substring ref at %C");
2966 5 : return MATCH_ERROR;
2967 : }
2968 : break;
2969 :
2970 293487 : case MATCH_NO:
2971 293487 : if (unknown)
2972 : {
2973 351 : gfc_clear_ts (&primary->ts);
2974 351 : gfc_clear_ts (&sym->ts);
2975 : }
2976 : break;
2977 :
2978 : case MATCH_ERROR:
2979 : return MATCH_ERROR;
2980 : }
2981 : }
2982 :
2983 : /* F08:C611. */
2984 5095578 : if (primary->ts.type == BT_DERIVED && primary->ref
2985 29221 : && primary->ts.u.derived && primary->ts.u.derived->attr.abstract)
2986 : {
2987 6 : gfc_error ("Nonpolymorphic reference to abstract type at %C");
2988 6 : return MATCH_ERROR;
2989 : }
2990 :
2991 : /* F08:C727. */
2992 5095572 : if (primary->expr_type == EXPR_PPC && gfc_is_coindexed (primary))
2993 : {
2994 3 : gfc_error ("Coindexed procedure-pointer component at %C");
2995 3 : return MATCH_ERROR;
2996 : }
2997 :
2998 : return MATCH_YES;
2999 : }
3000 :
3001 :
3002 : /* Given an expression that is a variable, figure out what the
3003 : ultimate variable's type and attribute is, traversing the reference
3004 : structures if necessary.
3005 :
3006 : This subroutine is trickier than it looks. We start at the base
3007 : symbol and store the attribute. Component references load a
3008 : completely new attribute.
3009 :
3010 : A couple of rules come into play. Subobjects of targets are always
3011 : targets themselves. If we see a component that goes through a
3012 : pointer, then the expression must also be a target, since the
3013 : pointer is associated with something (if it isn't core will soon be
3014 : dumped). If we see a full part or section of an array, the
3015 : expression is also an array.
3016 :
3017 : We can have at most one full array reference. */
3018 :
3019 : symbol_attribute
3020 5258439 : gfc_variable_attr (gfc_expr *expr, gfc_typespec *ts)
3021 : {
3022 5258439 : int dimension, codimension, pointer, allocatable, target, optional;
3023 5258439 : symbol_attribute attr;
3024 5258439 : gfc_ref *ref;
3025 5258439 : gfc_symbol *sym;
3026 5258439 : gfc_component *comp;
3027 5258439 : bool has_inquiry_part;
3028 5258439 : bool has_substring_ref = false;
3029 :
3030 5258439 : if (expr->expr_type != EXPR_VARIABLE
3031 55741 : && expr->expr_type != EXPR_FUNCTION
3032 9 : && !(expr->expr_type == EXPR_NULL && expr->ts.type != BT_UNKNOWN))
3033 0 : gfc_internal_error ("gfc_variable_attr(): Expression isn't a variable");
3034 :
3035 5258439 : sym = expr->symtree->n.sym;
3036 5258439 : attr = sym->attr;
3037 :
3038 5258439 : optional = attr.optional;
3039 5258439 : if (sym->ts.type == BT_CLASS && sym->attr.class_ok && sym->ts.u.derived)
3040 : {
3041 171604 : dimension = CLASS_DATA (sym)->attr.dimension;
3042 171604 : codimension = CLASS_DATA (sym)->attr.codimension;
3043 171604 : pointer = CLASS_DATA (sym)->attr.class_pointer;
3044 171604 : allocatable = CLASS_DATA (sym)->attr.allocatable;
3045 : }
3046 : else
3047 : {
3048 5086835 : dimension = attr.dimension;
3049 5086835 : codimension = attr.codimension;
3050 5086835 : pointer = attr.pointer;
3051 5086835 : allocatable = attr.allocatable;
3052 : }
3053 :
3054 5258439 : target = attr.target;
3055 5258439 : if (pointer || attr.proc_pointer)
3056 255329 : target = 1;
3057 :
3058 : /* F2018:11.1.3.3: Other attributes of associate names
3059 : "The associating entity does not have the ALLOCATABLE or POINTER
3060 : attributes; it has the TARGET attribute if and only if the selector is
3061 : a variable and has either the TARGET or POINTER attribute." */
3062 5258439 : if (sym->attr.associate_var && sym->assoc && sym->assoc->target)
3063 : {
3064 34912 : if (sym->assoc->target->expr_type == EXPR_VARIABLE)
3065 : {
3066 31194 : symbol_attribute tgt_attr;
3067 31194 : tgt_attr = gfc_expr_attr (sym->assoc->target);
3068 40456 : target = (tgt_attr.pointer || tgt_attr.target);
3069 : }
3070 : else
3071 : target = 0;
3072 : }
3073 :
3074 5258439 : if (ts != NULL && expr->ts.type == BT_UNKNOWN)
3075 52224 : *ts = sym->ts;
3076 :
3077 : /* Catch left-overs from match_actual_arg, where an actual argument of a
3078 : procedure is given a temporary ts.type == BT_PROCEDURE. The fixup is
3079 : needed for structure constructors in DATA statements, where a pointer
3080 : is associated with a data target, and the argument has not been fully
3081 : resolved yet. Components references are dealt with further below. */
3082 52224 : if (ts != NULL
3083 1319646 : && expr->ts.type == BT_PROCEDURE
3084 3046 : && expr->ref == NULL
3085 3046 : && attr.flavor != FL_PROCEDURE
3086 107 : && attr.target)
3087 1 : *ts = sym->ts;
3088 :
3089 5258439 : has_inquiry_part = false;
3090 7124188 : for (ref = expr->ref; ref; ref = ref->next)
3091 1867555 : if (ref->type == REF_SUBSTRING)
3092 : {
3093 : has_substring_ref = true;
3094 : optional = false;
3095 : }
3096 1848339 : else if (ref->type == REF_INQUIRY)
3097 : {
3098 : has_inquiry_part = true;
3099 : optional = false;
3100 : break;
3101 : }
3102 :
3103 7126001 : for (ref = expr->ref; ref; ref = ref->next)
3104 1867562 : switch (ref->type)
3105 : {
3106 1454658 : case REF_ARRAY:
3107 :
3108 1454658 : switch (ref->u.ar.type)
3109 : {
3110 : case AR_FULL:
3111 1867562 : dimension = 1;
3112 : break;
3113 :
3114 118131 : case AR_SECTION:
3115 118131 : allocatable = pointer = 0;
3116 118131 : dimension = 1;
3117 118131 : optional = false;
3118 118131 : break;
3119 :
3120 333400 : case AR_ELEMENT:
3121 : /* Handle coarrays. */
3122 333400 : if (ref->u.ar.dimen > 0)
3123 1867562 : allocatable = pointer = optional = false;
3124 : break;
3125 :
3126 : case AR_UNKNOWN:
3127 : /* For standard conforming code, AR_UNKNOWN should not happen.
3128 : For nonconforming code, gfortran can end up here. Treat it
3129 : as a no-op. */
3130 : break;
3131 : }
3132 :
3133 : break;
3134 :
3135 391875 : case REF_COMPONENT:
3136 391875 : optional = false;
3137 391875 : comp = ref->u.c.component;
3138 391875 : attr = comp->attr;
3139 391875 : if (ts != NULL && !has_inquiry_part)
3140 : {
3141 87555 : *ts = comp->ts;
3142 : /* Don't set the string length if a substring reference
3143 : follows. */
3144 87555 : if (ts->type == BT_CHARACTER && has_substring_ref)
3145 294 : ts->u.cl = NULL;
3146 : }
3147 :
3148 391875 : if (comp->ts.type == BT_CLASS)
3149 : {
3150 29375 : dimension = CLASS_DATA (comp)->attr.dimension;
3151 29375 : codimension = CLASS_DATA (comp)->attr.codimension;
3152 29375 : pointer = CLASS_DATA (comp)->attr.class_pointer;
3153 29375 : allocatable = CLASS_DATA (comp)->attr.allocatable;
3154 : }
3155 : else
3156 : {
3157 362500 : dimension = comp->attr.dimension;
3158 362500 : codimension = comp->attr.codimension;
3159 362500 : if (expr->ts.type == BT_CLASS && strcmp (comp->name, "_data") == 0)
3160 19755 : pointer = comp->attr.class_pointer;
3161 : else
3162 342745 : pointer = comp->attr.pointer;
3163 362500 : allocatable = comp->attr.allocatable;
3164 : }
3165 391875 : if (pointer || attr.proc_pointer)
3166 72898 : target = 1;
3167 :
3168 : break;
3169 :
3170 21029 : case REF_INQUIRY:
3171 21029 : case REF_SUBSTRING:
3172 21029 : allocatable = pointer = optional = false;
3173 21029 : break;
3174 : }
3175 :
3176 5258439 : attr.dimension = dimension;
3177 5258439 : attr.codimension = codimension;
3178 5258439 : attr.pointer = pointer;
3179 5258439 : attr.allocatable = allocatable;
3180 5258439 : attr.target = target;
3181 5258439 : attr.save = sym->attr.save;
3182 5258439 : attr.optional = optional;
3183 :
3184 5258439 : return attr;
3185 : }
3186 :
3187 :
3188 : /* Return the attribute from a general expression. */
3189 :
3190 : symbol_attribute
3191 4870299 : gfc_expr_attr (gfc_expr *e)
3192 : {
3193 4870299 : symbol_attribute attr;
3194 :
3195 4870299 : switch (e->expr_type)
3196 : {
3197 3874214 : case EXPR_VARIABLE:
3198 3874214 : attr = gfc_variable_attr (e, NULL);
3199 3874214 : break;
3200 :
3201 80850 : case EXPR_FUNCTION:
3202 80850 : gfc_clear_attr (&attr);
3203 :
3204 80850 : if (e->value.function.esym && e->value.function.esym->result)
3205 : {
3206 24796 : gfc_symbol *sym = e->value.function.esym->result;
3207 24796 : attr = sym->attr;
3208 24796 : if (sym->ts.type == BT_CLASS && sym->attr.class_ok)
3209 : {
3210 2206 : attr.dimension = CLASS_DATA (sym)->attr.dimension;
3211 2206 : attr.pointer = CLASS_DATA (sym)->attr.class_pointer;
3212 2206 : attr.allocatable = CLASS_DATA (sym)->attr.allocatable;
3213 : }
3214 : }
3215 56054 : else if (e->value.function.isym
3216 53091 : && e->value.function.isym->transformational
3217 22963 : && e->ts.type == BT_CLASS)
3218 330 : attr = CLASS_DATA (e)->attr;
3219 55724 : else if (e->symtree)
3220 55718 : attr = gfc_variable_attr (e, NULL);
3221 :
3222 : /* TODO: NULL() returns pointers. May have to take care of this
3223 : here. */
3224 :
3225 : break;
3226 :
3227 915235 : default:
3228 915235 : gfc_clear_attr (&attr);
3229 915235 : break;
3230 : }
3231 :
3232 4870299 : return attr;
3233 : }
3234 :
3235 :
3236 : /* Given an expression, figure out what the ultimate expression
3237 : attribute is. This routine is similar to gfc_variable_attr with
3238 : parts of gfc_expr_attr, but focuses more on the needs of
3239 : coarrays. For coarrays a codimension attribute is kind of
3240 : "infectious" being propagated once set and never cleared.
3241 : The coarray_comp is only set, when the expression refs a coarray
3242 : component. REFS_COMP is set when present to true only, when this EXPR
3243 : refs a (non-_data) component. To check whether EXPR refs an allocatable
3244 : component in a derived type coarray *refs_comp needs to be set and
3245 : coarray_comp has to false. */
3246 :
3247 : static symbol_attribute
3248 16115 : caf_variable_attr (gfc_expr *expr, bool in_allocate, bool *refs_comp)
3249 : {
3250 16115 : int dimension, codimension, pointer, allocatable, target, coarray_comp;
3251 16115 : symbol_attribute attr;
3252 16115 : gfc_ref *ref;
3253 16115 : gfc_symbol *sym;
3254 16115 : gfc_component *comp;
3255 :
3256 16115 : if (expr->expr_type != EXPR_VARIABLE && expr->expr_type != EXPR_FUNCTION)
3257 0 : gfc_internal_error ("gfc_caf_attr(): Expression isn't a variable");
3258 :
3259 16115 : sym = expr->symtree->n.sym;
3260 16115 : gfc_clear_attr (&attr);
3261 :
3262 16115 : if (refs_comp)
3263 10877 : *refs_comp = false;
3264 :
3265 16115 : if (sym->ts.type == BT_CLASS && sym->attr.class_ok)
3266 : {
3267 410 : dimension = CLASS_DATA (sym)->attr.dimension;
3268 410 : codimension = CLASS_DATA (sym)->attr.codimension;
3269 410 : pointer = CLASS_DATA (sym)->attr.class_pointer;
3270 410 : allocatable = CLASS_DATA (sym)->attr.allocatable;
3271 410 : attr.alloc_comp = CLASS_DATA (sym)->ts.u.derived->attr.alloc_comp;
3272 410 : attr.pointer_comp = CLASS_DATA (sym)->ts.u.derived->attr.pointer_comp;
3273 : }
3274 : else
3275 : {
3276 15705 : dimension = sym->attr.dimension;
3277 15705 : codimension = sym->attr.codimension;
3278 15705 : pointer = sym->attr.pointer;
3279 15705 : allocatable = sym->attr.allocatable;
3280 31410 : attr.alloc_comp = sym->ts.type == BT_DERIVED
3281 15705 : ? sym->ts.u.derived->attr.alloc_comp : 0;
3282 15705 : attr.pointer_comp = sym->ts.type == BT_DERIVED
3283 15705 : ? sym->ts.u.derived->attr.pointer_comp : 0;
3284 : }
3285 :
3286 16115 : target = coarray_comp = 0;
3287 16115 : if (pointer || attr.proc_pointer)
3288 638 : target = 1;
3289 :
3290 28281 : for (ref = expr->ref; ref; ref = ref->next)
3291 12166 : switch (ref->type)
3292 : {
3293 8467 : case REF_ARRAY:
3294 :
3295 8467 : switch (ref->u.ar.type)
3296 : {
3297 : case AR_FULL:
3298 : case AR_SECTION:
3299 : dimension = 1;
3300 8467 : break;
3301 :
3302 3966 : case AR_ELEMENT:
3303 : /* Handle coarrays. */
3304 3966 : if (ref->u.ar.dimen > 0 && !in_allocate)
3305 8467 : allocatable = pointer = 0;
3306 : break;
3307 :
3308 0 : case AR_UNKNOWN:
3309 : /* If any of start, end or stride is not integer, there will
3310 : already have been an error issued. */
3311 0 : int errors;
3312 0 : gfc_get_errors (NULL, &errors);
3313 0 : if (errors == 0)
3314 0 : gfc_internal_error ("gfc_caf_attr(): Bad array reference");
3315 : }
3316 :
3317 : break;
3318 :
3319 3697 : case REF_COMPONENT:
3320 3697 : comp = ref->u.c.component;
3321 :
3322 3697 : if (comp->ts.type == BT_CLASS)
3323 : {
3324 : /* Set coarray_comp only, when this component introduces the
3325 : coarray. */
3326 13 : coarray_comp = !codimension && CLASS_DATA (comp)->attr.codimension;
3327 13 : codimension |= CLASS_DATA (comp)->attr.codimension;
3328 13 : pointer = CLASS_DATA (comp)->attr.class_pointer;
3329 13 : allocatable = CLASS_DATA (comp)->attr.allocatable;
3330 : }
3331 : else
3332 : {
3333 : /* Set coarray_comp only, when this component introduces the
3334 : coarray. */
3335 3684 : coarray_comp = !codimension && comp->attr.codimension;
3336 3684 : codimension |= comp->attr.codimension;
3337 3684 : pointer = comp->attr.pointer;
3338 3684 : allocatable = comp->attr.allocatable;
3339 : }
3340 :
3341 3697 : if (refs_comp && strcmp (comp->name, "_data") != 0
3342 2185 : && (ref->next == NULL
3343 1656 : || (ref->next->type == REF_ARRAY && ref->next->next == NULL)))
3344 1616 : *refs_comp = true;
3345 :
3346 3697 : if (pointer || attr.proc_pointer)
3347 690 : target = 1;
3348 :
3349 : break;
3350 :
3351 : case REF_SUBSTRING:
3352 : case REF_INQUIRY:
3353 12166 : allocatable = pointer = 0;
3354 : break;
3355 : }
3356 :
3357 16115 : attr.dimension = dimension;
3358 16115 : attr.codimension = codimension;
3359 16115 : attr.pointer = pointer;
3360 16115 : attr.allocatable = allocatable;
3361 16115 : attr.target = target;
3362 16115 : attr.save = sym->attr.save;
3363 16115 : attr.coarray_comp = coarray_comp;
3364 :
3365 16115 : return attr;
3366 : }
3367 :
3368 :
3369 : symbol_attribute
3370 20119 : gfc_caf_attr (gfc_expr *e, bool in_allocate, bool *refs_comp)
3371 : {
3372 20119 : symbol_attribute attr;
3373 :
3374 20119 : switch (e->expr_type)
3375 : {
3376 14532 : case EXPR_VARIABLE:
3377 14532 : attr = caf_variable_attr (e, in_allocate, refs_comp);
3378 14532 : break;
3379 :
3380 1589 : case EXPR_FUNCTION:
3381 1589 : gfc_clear_attr (&attr);
3382 :
3383 1589 : if (e->value.function.esym && e->value.function.esym->result)
3384 : {
3385 6 : gfc_symbol *sym = e->value.function.esym->result;
3386 6 : attr = sym->attr;
3387 6 : if (sym->ts.type == BT_CLASS)
3388 : {
3389 0 : attr.dimension = CLASS_DATA (sym)->attr.dimension;
3390 0 : attr.pointer = CLASS_DATA (sym)->attr.class_pointer;
3391 0 : attr.allocatable = CLASS_DATA (sym)->attr.allocatable;
3392 0 : attr.alloc_comp = CLASS_DATA (sym)->ts.u.derived->attr.alloc_comp;
3393 0 : attr.pointer_comp = CLASS_DATA (sym)->ts.u.derived
3394 0 : ->attr.pointer_comp;
3395 : }
3396 : }
3397 1583 : else if (e->symtree)
3398 1583 : attr = caf_variable_attr (e, in_allocate, refs_comp);
3399 : else
3400 0 : gfc_clear_attr (&attr);
3401 : break;
3402 :
3403 3998 : default:
3404 3998 : gfc_clear_attr (&attr);
3405 3998 : break;
3406 : }
3407 :
3408 20119 : return attr;
3409 : }
3410 :
3411 :
3412 : /* Match a structure constructor. The initial symbol has already been
3413 : seen. */
3414 :
3415 : typedef struct gfc_structure_ctor_component
3416 : {
3417 : char* name;
3418 : gfc_expr* val;
3419 : locus where;
3420 : struct gfc_structure_ctor_component* next;
3421 : }
3422 : gfc_structure_ctor_component;
3423 :
3424 : #define gfc_get_structure_ctor_component() XCNEW (gfc_structure_ctor_component)
3425 :
3426 : static void
3427 10581 : gfc_free_structure_ctor_component (gfc_structure_ctor_component *comp)
3428 : {
3429 10581 : free (comp->name);
3430 10581 : gfc_free_expr (comp->val);
3431 10581 : free (comp);
3432 10581 : }
3433 :
3434 :
3435 : /* Translate the component list into the actual constructor by sorting it in
3436 : the order required; this also checks along the way that each and every
3437 : component actually has an initializer and handles default initializers
3438 : for components without explicit value given. */
3439 : static bool
3440 7369 : build_actual_constructor (gfc_structure_ctor_component **comp_head,
3441 : gfc_constructor_base *ctor_head, gfc_symbol *sym)
3442 : {
3443 7369 : gfc_structure_ctor_component *comp_iter;
3444 7369 : gfc_component *comp;
3445 :
3446 19351 : for (comp = sym->components; comp; comp = comp->next)
3447 : {
3448 11994 : gfc_structure_ctor_component **next_ptr;
3449 11994 : gfc_expr *value = NULL;
3450 :
3451 : /* Try to find the initializer for the current component by name. */
3452 11994 : next_ptr = comp_head;
3453 13167 : for (comp_iter = *comp_head; comp_iter; comp_iter = comp_iter->next)
3454 : {
3455 11730 : if (!strcmp (comp_iter->name, comp->name))
3456 : break;
3457 1173 : next_ptr = &comp_iter->next;
3458 : }
3459 :
3460 : /* If an extension, try building the parent derived type by building
3461 : a value expression for the parent derived type and calling self. */
3462 11994 : if (!comp_iter && comp == sym->components && sym->attr.extension)
3463 : {
3464 106 : value = gfc_get_structure_constructor_expr (comp->ts.type,
3465 : comp->ts.kind,
3466 : &gfc_current_locus);
3467 106 : value->ts = comp->ts;
3468 :
3469 106 : if (!build_actual_constructor (comp_head,
3470 : &value->value.constructor,
3471 106 : comp->ts.u.derived))
3472 : {
3473 0 : gfc_free_expr (value);
3474 0 : return false;
3475 : }
3476 :
3477 106 : gfc_constructor_append_expr (ctor_head, value, NULL);
3478 106 : continue;
3479 : }
3480 :
3481 : /* If it was not found, apply NULL expression to set the component as
3482 : unallocated. Then try the default initializer if there's any;
3483 : otherwise, it's an error unless this is a deferred parameter. */
3484 1331 : if (!comp_iter)
3485 : {
3486 : /* F2018 7.5.10: If an allocatable component has no corresponding
3487 : component-data-source, then that component has an allocation
3488 : status of unallocated.... */
3489 1331 : if (comp->attr.allocatable
3490 1196 : || (comp->ts.type == BT_CLASS
3491 15 : && CLASS_DATA (comp)->attr.allocatable))
3492 : {
3493 144 : if (!gfc_notify_std (GFC_STD_F2008, "No initializer for "
3494 : "allocatable component %qs given in the "
3495 : "structure constructor at %C", comp->name))
3496 : return false;
3497 144 : value = gfc_get_null_expr (&gfc_current_locus);
3498 : }
3499 : /* ....(Preceding sentence) If a component with default
3500 : initialization has no corresponding component-data-source, then
3501 : the default initialization is applied to that component. */
3502 1187 : else if (comp->initializer)
3503 : {
3504 667 : if (!gfc_notify_std (GFC_STD_F2003, "Structure constructor "
3505 : "with missing optional arguments at %C"))
3506 : return false;
3507 665 : value = gfc_copy_expr (comp->initializer);
3508 : }
3509 : /* Do not trap components such as the string length for deferred
3510 : length character components. */
3511 520 : else if (!comp->attr.artificial)
3512 : {
3513 10 : gfc_error ("No initializer for component %qs given in the"
3514 : " structure constructor at %C", comp->name);
3515 10 : return false;
3516 : }
3517 : }
3518 : else
3519 10557 : value = comp_iter->val;
3520 :
3521 : /* Add the value to the constructor chain built. */
3522 11876 : gfc_constructor_append_expr (ctor_head, value, NULL);
3523 :
3524 : /* Remove the entry from the component list. We don't want the expression
3525 : value to be free'd, so set it to NULL. */
3526 11876 : if (comp_iter)
3527 : {
3528 10557 : *next_ptr = comp_iter->next;
3529 10557 : comp_iter->val = NULL;
3530 10557 : gfc_free_structure_ctor_component (comp_iter);
3531 : }
3532 : }
3533 : return true;
3534 : }
3535 :
3536 :
3537 : bool
3538 7278 : gfc_convert_to_structure_constructor (gfc_expr *e, gfc_symbol *sym, gfc_expr **cexpr,
3539 : gfc_actual_arglist **arglist,
3540 : bool parent)
3541 : {
3542 7278 : gfc_actual_arglist *actual;
3543 7278 : gfc_structure_ctor_component *comp_tail, *comp_head, *comp_iter;
3544 7278 : gfc_constructor_base ctor_head = NULL;
3545 7278 : gfc_component *comp; /* Is set NULL when named component is first seen */
3546 7278 : const char* last_name = NULL;
3547 7278 : locus old_locus;
3548 7278 : gfc_expr *expr;
3549 :
3550 7278 : expr = parent ? *cexpr : e;
3551 7278 : old_locus = gfc_current_locus;
3552 7278 : if (parent)
3553 : ; /* gfc_current_locus = *arglist->expr ? ->where;*/
3554 : else
3555 6546 : gfc_current_locus = expr->where;
3556 :
3557 7278 : comp_tail = comp_head = NULL;
3558 :
3559 7278 : if (!parent && sym->attr.abstract)
3560 : {
3561 1 : gfc_error ("Cannot construct ABSTRACT type %qs at %L",
3562 : sym->name, &expr->where);
3563 1 : goto cleanup;
3564 : }
3565 :
3566 7277 : comp = sym->components;
3567 7277 : actual = parent ? *arglist : expr->value.function.actual;
3568 17239 : for ( ; actual; )
3569 : {
3570 10581 : gfc_component *this_comp = NULL;
3571 :
3572 10581 : if (!comp_head)
3573 6857 : comp_tail = comp_head = gfc_get_structure_ctor_component ();
3574 : else
3575 : {
3576 3724 : comp_tail->next = gfc_get_structure_ctor_component ();
3577 3724 : comp_tail = comp_tail->next;
3578 : }
3579 10581 : if (actual->name)
3580 : {
3581 1351 : if (!gfc_notify_std (GFC_STD_F2003, "Structure"
3582 : " constructor with named arguments at %C"))
3583 1 : goto cleanup;
3584 :
3585 1350 : comp_tail->name = xstrdup (actual->name);
3586 1350 : last_name = comp_tail->name;
3587 1350 : comp = NULL;
3588 : }
3589 : else
3590 : {
3591 : /* Components without name are not allowed after the first named
3592 : component initializer! */
3593 9230 : if (!comp || comp->attr.artificial)
3594 : {
3595 2 : if (last_name)
3596 0 : gfc_error ("Component initializer without name after component"
3597 : " named %s at %L", last_name,
3598 0 : actual->expr ? &actual->expr->where
3599 : : &gfc_current_locus);
3600 : else
3601 2 : gfc_error ("Too many components in structure constructor at "
3602 2 : "%L", actual->expr ? &actual->expr->where
3603 : : &gfc_current_locus);
3604 2 : goto cleanup;
3605 : }
3606 :
3607 9228 : comp_tail->name = xstrdup (comp->name);
3608 : }
3609 :
3610 : /* Find the current component in the structure definition and check
3611 : its access is not private. */
3612 10578 : if (comp)
3613 9228 : this_comp = gfc_find_component (sym, comp->name, false, false, NULL);
3614 : else
3615 : {
3616 1350 : this_comp = gfc_find_component (sym, (const char *)comp_tail->name,
3617 : false, false, NULL);
3618 1350 : comp = NULL; /* Reset needed! */
3619 : }
3620 :
3621 : /* Here we can check if a component name is given which does not
3622 : correspond to any component of the defined structure. */
3623 10578 : if (!this_comp)
3624 8 : goto cleanup;
3625 :
3626 : /* For a constant string constructor, make sure the length is
3627 : correct; truncate or fill with blanks if needed. */
3628 10570 : if (this_comp->ts.type == BT_CHARACTER && !this_comp->attr.allocatable
3629 1113 : && this_comp->ts.u.cl && this_comp->ts.u.cl->length
3630 1111 : && this_comp->ts.u.cl->length->expr_type == EXPR_CONSTANT
3631 1093 : && this_comp->ts.u.cl->length->ts.type == BT_INTEGER
3632 1092 : && actual->expr
3633 1088 : && actual->expr->ts.type == BT_CHARACTER
3634 970 : && actual->expr->expr_type == EXPR_CONSTANT)
3635 : {
3636 747 : ptrdiff_t c, e1;
3637 747 : c = gfc_mpz_get_hwi (this_comp->ts.u.cl->length->value.integer);
3638 747 : e1 = actual->expr->value.character.length;
3639 :
3640 747 : if (c != e1)
3641 : {
3642 249 : ptrdiff_t i, to;
3643 249 : gfc_char_t *dest;
3644 249 : dest = gfc_get_wide_string (c + 1);
3645 :
3646 249 : to = e1 < c ? e1 : c;
3647 4482 : for (i = 0; i < to; i++)
3648 4233 : dest[i] = actual->expr->value.character.string[i];
3649 :
3650 5812 : for (i = e1; i < c; i++)
3651 5563 : dest[i] = ' ';
3652 :
3653 249 : dest[c] = '\0';
3654 249 : free (actual->expr->value.character.string);
3655 :
3656 249 : actual->expr->value.character.length = c;
3657 249 : actual->expr->value.character.string = dest;
3658 :
3659 249 : if (warn_line_truncation && c < e1)
3660 14 : gfc_warning_now (OPT_Wcharacter_truncation,
3661 : "CHARACTER expression will be truncated "
3662 : "in constructor (%td/%td) at %L", c,
3663 : e1, &actual->expr->where);
3664 : }
3665 : }
3666 :
3667 10570 : comp_tail->val = actual->expr;
3668 10570 : if (actual->expr != NULL)
3669 10565 : comp_tail->where = actual->expr->where;
3670 10570 : actual->expr = NULL;
3671 :
3672 : /* Check if this component is already given a value. */
3673 16783 : for (comp_iter = comp_head; comp_iter != comp_tail;
3674 6213 : comp_iter = comp_iter->next)
3675 : {
3676 6214 : gcc_assert (comp_iter);
3677 6214 : if (!strcmp (comp_iter->name, comp_tail->name))
3678 : {
3679 1 : gfc_error ("Component %qs is initialized twice in the structure"
3680 : " constructor at %L", comp_tail->name,
3681 : comp_tail->val ? &comp_tail->where
3682 : : &gfc_current_locus);
3683 1 : goto cleanup;
3684 : }
3685 : }
3686 :
3687 : /* F2008, R457/C725, for PURE C1283. */
3688 72 : if (this_comp->attr.pointer && comp_tail->val
3689 10641 : && gfc_is_coindexed (comp_tail->val))
3690 : {
3691 2 : gfc_error ("Coindexed expression to pointer component %qs in "
3692 : "structure constructor at %L", comp_tail->name,
3693 : &comp_tail->where);
3694 2 : goto cleanup;
3695 : }
3696 :
3697 : /* If not explicitly a parent constructor, gather up the components
3698 : and build one. */
3699 10567 : if (comp && comp == sym->components
3700 6411 : && sym->attr.extension
3701 780 : && comp_tail->val
3702 780 : && (!gfc_bt_struct (comp_tail->val->ts.type)
3703 78 : || comp_tail->val->ts.u.derived != this_comp->ts.u.derived))
3704 : {
3705 732 : bool m;
3706 732 : gfc_actual_arglist *arg_null = NULL;
3707 :
3708 732 : actual->expr = comp_tail->val;
3709 732 : comp_tail->val = NULL;
3710 : #define shorter gfc_convert_to_structure_constructor
3711 732 : m = shorter (NULL, comp->ts.u.derived, &comp_tail->val,
3712 732 : comp->ts.u.derived->attr.zero_comp ? &arg_null :
3713 : &actual, true);
3714 : #undef shorter
3715 :
3716 732 : if (!m)
3717 0 : goto cleanup;
3718 :
3719 732 : if (comp->ts.u.derived->attr.zero_comp)
3720 : {
3721 126 : comp = comp->next;
3722 126 : continue;
3723 : }
3724 : }
3725 :
3726 606 : if (comp)
3727 9094 : comp = comp->next;
3728 10441 : if (parent && !comp)
3729 : break;
3730 :
3731 9836 : if (actual)
3732 9835 : actual = actual->next;
3733 : }
3734 :
3735 7263 : if (!build_actual_constructor (&comp_head, &ctor_head, sym))
3736 12 : goto cleanup;
3737 :
3738 : /* No component should be left, as this should have caused an error in the
3739 : loop constructing the component-list (name that does not correspond to any
3740 : component in the structure definition). */
3741 7251 : if (comp_head && sym->attr.extension)
3742 : {
3743 2 : for (comp_iter = comp_head; comp_iter; comp_iter = comp_iter->next)
3744 : {
3745 1 : gfc_error ("component %qs at %L has already been set by a "
3746 : "parent derived type constructor", comp_iter->name,
3747 : &comp_iter->where);
3748 : }
3749 1 : goto cleanup;
3750 : }
3751 : else
3752 7250 : gcc_assert (!comp_head);
3753 :
3754 7250 : if (parent)
3755 : {
3756 732 : expr = gfc_get_structure_constructor_expr (BT_DERIVED, 0, &gfc_current_locus);
3757 732 : expr->ts.u.derived = sym;
3758 732 : expr->value.constructor = ctor_head;
3759 732 : *cexpr = expr;
3760 : }
3761 : else
3762 : {
3763 6518 : expr->ts.u.derived = sym;
3764 6518 : expr->ts.kind = 0;
3765 6518 : expr->ts.type = BT_DERIVED;
3766 6518 : expr->value.constructor = ctor_head;
3767 6518 : expr->expr_type = EXPR_STRUCTURE;
3768 : }
3769 :
3770 7250 : gfc_current_locus = old_locus;
3771 7250 : if (parent)
3772 732 : *arglist = actual;
3773 : return true;
3774 :
3775 28 : cleanup:
3776 28 : gfc_current_locus = old_locus;
3777 :
3778 52 : for (comp_iter = comp_head; comp_iter; )
3779 : {
3780 24 : gfc_structure_ctor_component *next = comp_iter->next;
3781 24 : gfc_free_structure_ctor_component (comp_iter);
3782 24 : comp_iter = next;
3783 : }
3784 28 : gfc_constructor_free (ctor_head);
3785 :
3786 28 : return false;
3787 : }
3788 :
3789 :
3790 : match
3791 60 : gfc_match_structure_constructor (gfc_symbol *sym, gfc_symtree *symtree,
3792 : gfc_expr **result)
3793 : {
3794 60 : match m;
3795 60 : gfc_expr *e;
3796 60 : bool t = true;
3797 :
3798 60 : e = gfc_get_expr ();
3799 60 : e->expr_type = EXPR_FUNCTION;
3800 60 : e->symtree = symtree;
3801 60 : e->where = gfc_current_locus;
3802 :
3803 60 : gcc_assert (gfc_fl_struct (sym->attr.flavor)
3804 : && symtree->n.sym->attr.flavor == FL_PROCEDURE);
3805 60 : e->value.function.esym = sym;
3806 60 : e->symtree->n.sym->attr.generic = 1;
3807 :
3808 60 : m = gfc_match_actual_arglist (0, &e->value.function.actual);
3809 60 : if (m != MATCH_YES)
3810 : {
3811 0 : gfc_free_expr (e);
3812 0 : return m;
3813 : }
3814 :
3815 60 : if (!gfc_convert_to_structure_constructor (e, sym, NULL, NULL, false))
3816 : {
3817 1 : gfc_free_expr (e);
3818 1 : return MATCH_ERROR;
3819 : }
3820 :
3821 : /* If a structure constructor is in a DATA statement, then each entity
3822 : in the structure constructor must be a constant. Try to reduce the
3823 : expression here. */
3824 59 : if (gfc_in_match_data ())
3825 59 : t = gfc_reduce_init_expr (e);
3826 :
3827 59 : if (t)
3828 : {
3829 49 : *result = e;
3830 49 : return MATCH_YES;
3831 : }
3832 : else
3833 : {
3834 10 : gfc_free_expr (e);
3835 10 : return MATCH_ERROR;
3836 : }
3837 : }
3838 :
3839 :
3840 : /* If the symbol is an implicit do loop index and implicitly typed,
3841 : it should not be host associated. Provide a symtree from the
3842 : current namespace. */
3843 : static match
3844 6904434 : check_for_implicit_index (gfc_symtree **st, gfc_symbol **sym)
3845 : {
3846 6904434 : if ((*sym)->attr.flavor == FL_VARIABLE
3847 1999352 : && (*sym)->ns != gfc_current_ns
3848 61147 : && (*sym)->attr.implied_index
3849 588 : && (*sym)->attr.implicit_type
3850 32 : && !(*sym)->attr.use_assoc)
3851 : {
3852 32 : int i;
3853 32 : i = gfc_get_sym_tree ((*sym)->name, NULL, st, false);
3854 32 : if (i)
3855 : return MATCH_ERROR;
3856 32 : *sym = (*st)->n.sym;
3857 : }
3858 : return MATCH_YES;
3859 : }
3860 :
3861 :
3862 : /* Procedure pointer as function result: Replace the function symbol by the
3863 : auto-generated hidden result variable named "ppr@". */
3864 :
3865 : static bool
3866 5151688 : replace_hidden_procptr_result (gfc_symbol **sym, gfc_symtree **st)
3867 : {
3868 : /* Check for procedure pointer result variable. */
3869 5151688 : if ((*sym)->attr.function && !(*sym)->attr.external
3870 1403199 : && (*sym)->result && (*sym)->result != *sym
3871 10790 : && (*sym)->result->attr.proc_pointer
3872 337 : && (*sym) == gfc_current_ns->proc_name
3873 285 : && (*sym) == (*sym)->result->ns->proc_name
3874 285 : && strcmp ("ppr@", (*sym)->result->name) == 0)
3875 : {
3876 : /* Automatic replacement with "hidden" result variable. */
3877 285 : (*sym)->result->attr.referenced = (*sym)->attr.referenced;
3878 285 : *sym = (*sym)->result;
3879 285 : *st = gfc_find_symtree ((*sym)->ns->sym_root, (*sym)->name);
3880 285 : return true;
3881 : }
3882 : return false;
3883 : }
3884 :
3885 :
3886 : /* Matches a variable name followed by anything that might follow it--
3887 : array reference, argument list of a function, etc. */
3888 :
3889 : match
3890 4251657 : gfc_match_rvalue (gfc_expr **result)
3891 : {
3892 4251657 : gfc_actual_arglist *actual_arglist;
3893 4251657 : char name[GFC_MAX_SYMBOL_LEN + 1], argname[GFC_MAX_SYMBOL_LEN + 1];
3894 4251657 : gfc_state_data *st;
3895 4251657 : gfc_symbol *sym;
3896 4251657 : gfc_symtree *symtree;
3897 4251657 : locus where, old_loc;
3898 4251657 : gfc_expr *e;
3899 4251657 : match m, m2;
3900 4251657 : int i;
3901 4251657 : gfc_typespec *ts;
3902 4251657 : bool implicit_char;
3903 4251657 : gfc_ref *ref;
3904 4251657 : gfc_symtree *pdt_st;
3905 :
3906 4251657 : m = gfc_match ("%%loc");
3907 4251657 : if (m == MATCH_YES)
3908 : {
3909 10878 : if (!gfc_notify_std (GFC_STD_LEGACY, "%%LOC() as an rvalue at %C"))
3910 : return MATCH_ERROR;
3911 10877 : strncpy (name, "loc", 4);
3912 : }
3913 :
3914 : else
3915 : {
3916 4240779 : m = gfc_match_name (name);
3917 4240779 : if (m != MATCH_YES)
3918 : return m;
3919 : }
3920 :
3921 : /* Check if the symbol exists. */
3922 4047637 : if (gfc_find_sym_tree (name, NULL, 1, &symtree))
3923 : return MATCH_ERROR;
3924 :
3925 : /* If the symbol doesn't exist, create it unless the name matches a FL_STRUCT
3926 : type. For derived types we create a generic symbol which links to the
3927 : derived type symbol; STRUCTUREs are simpler and must not conflict with
3928 : variables. */
3929 4047635 : if (!symtree)
3930 179433 : if (gfc_find_sym_tree (gfc_dt_upper_string (name), NULL, 1, &symtree))
3931 : return MATCH_ERROR;
3932 4047635 : if (!symtree || symtree->n.sym->attr.flavor != FL_STRUCT)
3933 : {
3934 4047635 : if (gfc_find_state (COMP_INTERFACE)
3935 4047635 : && !gfc_current_ns->has_import_set)
3936 93602 : i = gfc_get_sym_tree (name, NULL, &symtree, false);
3937 : else
3938 3954033 : i = gfc_get_ha_sym_tree (name, &symtree);
3939 4047635 : if (i)
3940 : return MATCH_ERROR;
3941 : }
3942 :
3943 :
3944 4047635 : sym = symtree->n.sym;
3945 4047635 : e = NULL;
3946 4047635 : where = gfc_current_locus;
3947 :
3948 4047635 : replace_hidden_procptr_result (&sym, &symtree);
3949 :
3950 : /* If this is an implicit do loop index and implicitly typed,
3951 : it should not be host associated. */
3952 4047635 : m = check_for_implicit_index (&symtree, &sym);
3953 4047635 : if (m != MATCH_YES)
3954 : return m;
3955 :
3956 4047635 : gfc_set_sym_referenced (sym);
3957 4047635 : sym->attr.implied_index = 0;
3958 :
3959 4047635 : if (sym->attr.function && sym->result == sym)
3960 : {
3961 : /* See if this is a directly recursive function call. */
3962 705383 : gfc_gobble_whitespace ();
3963 705383 : if (sym->attr.recursive
3964 100 : && gfc_peek_ascii_char () == '('
3965 93 : && gfc_current_ns->proc_name == sym
3966 705390 : && !sym->attr.dimension)
3967 : {
3968 4 : gfc_error ("%qs at %C is the name of a recursive function "
3969 : "and so refers to the result variable. Use an "
3970 : "explicit RESULT variable for direct recursion "
3971 : "(12.5.2.1)", sym->name);
3972 4 : return MATCH_ERROR;
3973 : }
3974 :
3975 705379 : if (gfc_is_function_return_value (sym, gfc_current_ns))
3976 1701 : goto variable;
3977 :
3978 703678 : if (sym->attr.entry
3979 187 : && (sym->ns == gfc_current_ns
3980 27 : || sym->ns == gfc_current_ns->parent))
3981 : {
3982 180 : gfc_entry_list *el = NULL;
3983 :
3984 180 : for (el = sym->ns->entries; el; el = el->next)
3985 180 : if (sym == el->sym)
3986 180 : goto variable;
3987 : }
3988 : }
3989 :
3990 4045750 : if (gfc_matching_procptr_assignment)
3991 : {
3992 : /* It can be a procedure or a derived-type procedure or a not-yet-known
3993 : type. */
3994 1345 : if (sym->attr.flavor != FL_UNKNOWN
3995 997 : && sym->attr.flavor != FL_PROCEDURE
3996 : && sym->attr.flavor != FL_PARAMETER
3997 : && sym->attr.flavor != FL_VARIABLE)
3998 : {
3999 2 : gfc_error ("Symbol at %C is not appropriate for an expression");
4000 2 : return MATCH_ERROR;
4001 : }
4002 1343 : goto procptr0;
4003 : }
4004 :
4005 4044405 : if (sym->attr.function || sym->attr.external || sym->attr.intrinsic)
4006 718108 : goto function0;
4007 :
4008 3326297 : if (sym->attr.generic)
4009 67892 : goto generic_function;
4010 :
4011 3258405 : switch (sym->attr.flavor)
4012 : {
4013 1731732 : case FL_VARIABLE:
4014 1731732 : variable:
4015 1731732 : e = gfc_get_expr ();
4016 :
4017 1731732 : e->expr_type = EXPR_VARIABLE;
4018 1731732 : e->symtree = symtree;
4019 :
4020 1731732 : m = gfc_match_varspec (e, 0, false, true);
4021 1731732 : break;
4022 :
4023 222953 : case FL_PARAMETER:
4024 : /* A statement of the form "REAL, parameter :: a(0:10) = 1" will
4025 : end up here. Unfortunately, sym->value->expr_type is set to
4026 : EXPR_CONSTANT, and so the if () branch would be followed without
4027 : the !sym->as check. */
4028 222953 : if (sym->value && sym->value->expr_type != EXPR_ARRAY && !sym->as)
4029 188391 : e = gfc_copy_expr (sym->value);
4030 : else
4031 : {
4032 34562 : e = gfc_get_expr ();
4033 34562 : e->expr_type = EXPR_VARIABLE;
4034 : }
4035 :
4036 222953 : e->symtree = symtree;
4037 222953 : m = gfc_match_varspec (e, 0, false, true);
4038 :
4039 222953 : if (sym->ts.is_c_interop || sym->ts.is_iso_c)
4040 : break;
4041 :
4042 : /* Variable array references to derived type parameters cause
4043 : all sorts of headaches in simplification. Treating such
4044 : expressions as variable works just fine for all array
4045 : references. */
4046 173769 : if (sym->value && sym->ts.type == BT_DERIVED && e->ref)
4047 : {
4048 2828 : for (ref = e->ref; ref; ref = ref->next)
4049 2642 : if (ref->type == REF_ARRAY)
4050 : break;
4051 :
4052 2597 : if (ref == NULL || ref->u.ar.type == AR_FULL)
4053 : break;
4054 :
4055 1002 : ref = e->ref;
4056 1002 : e->ref = NULL;
4057 1002 : gfc_free_expr (e);
4058 1002 : e = gfc_get_expr ();
4059 1002 : e->expr_type = EXPR_VARIABLE;
4060 1002 : e->symtree = symtree;
4061 1002 : e->ref = ref;
4062 : }
4063 :
4064 : break;
4065 :
4066 0 : case FL_STRUCT:
4067 0 : case FL_DERIVED:
4068 0 : sym = gfc_use_derived (sym);
4069 0 : if (sym == NULL)
4070 : m = MATCH_ERROR;
4071 : else
4072 0 : goto generic_function;
4073 : break;
4074 :
4075 : /* If we're here, then the name is known to be the name of a
4076 : procedure, yet it is not sure to be the name of a function. */
4077 1016670 : case FL_PROCEDURE:
4078 :
4079 : /* Procedure Pointer Assignments. */
4080 1016670 : procptr0:
4081 1016670 : if (gfc_matching_procptr_assignment)
4082 : {
4083 1343 : gfc_gobble_whitespace ();
4084 1343 : if (!sym->attr.dimension && gfc_peek_ascii_char () == '(')
4085 : /* Parse functions returning a procptr. */
4086 210 : goto function0;
4087 :
4088 1133 : e = gfc_get_expr ();
4089 1133 : e->expr_type = EXPR_VARIABLE;
4090 1133 : e->symtree = symtree;
4091 1133 : m = gfc_match_varspec (e, 0, false, true);
4092 1065 : if (!e->ref && sym->attr.flavor == FL_UNKNOWN
4093 203 : && sym->ts.type == BT_UNKNOWN
4094 1326 : && !gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL))
4095 : {
4096 : m = MATCH_ERROR;
4097 : break;
4098 : }
4099 : break;
4100 : }
4101 :
4102 1015327 : if (sym->attr.subroutine)
4103 : {
4104 57 : gfc_error ("Unexpected use of subroutine name %qs at %C",
4105 : sym->name);
4106 57 : m = MATCH_ERROR;
4107 57 : break;
4108 : }
4109 :
4110 : /* At this point, the name has to be a non-statement function.
4111 : If the name is the same as the current function being
4112 : compiled, then we have a variable reference (to the function
4113 : result) if the name is non-recursive. */
4114 :
4115 1015270 : st = gfc_enclosing_unit (NULL);
4116 :
4117 1015270 : if (st != NULL
4118 970763 : && st->state == COMP_FUNCTION
4119 84179 : && st->sym == sym
4120 0 : && !sym->attr.recursive)
4121 : {
4122 0 : e = gfc_get_expr ();
4123 0 : e->symtree = symtree;
4124 0 : e->expr_type = EXPR_VARIABLE;
4125 :
4126 0 : m = gfc_match_varspec (e, 0, false, true);
4127 0 : break;
4128 : }
4129 :
4130 : /* Match a function reference. */
4131 1015270 : function0:
4132 1733588 : m = gfc_match_actual_arglist (0, &actual_arglist);
4133 1733588 : if (m == MATCH_NO)
4134 : {
4135 599993 : if (sym->attr.proc == PROC_ST_FUNCTION)
4136 1 : gfc_error ("Statement function %qs requires argument list at %C",
4137 : sym->name);
4138 : else
4139 599992 : gfc_error ("Function %qs requires an argument list at %C",
4140 : sym->name);
4141 :
4142 : m = MATCH_ERROR;
4143 : break;
4144 : }
4145 :
4146 1133595 : if (m != MATCH_YES)
4147 : {
4148 : m = MATCH_ERROR;
4149 : break;
4150 : }
4151 :
4152 : /* Check to see if this is a PDT constructor. The format of these
4153 : constructors is rather unusual:
4154 : name [(type_params)](component_values)
4155 : where, component_values excludes the type_params. With the present
4156 : gfortran representation this is rather awkward because the two are not
4157 : distinguished, other than by their attributes.
4158 :
4159 : Even if 'name' is that of a PDT template, priority has to be given to
4160 : specific procedures, other than the constructor, in the generic
4161 : interface. */
4162 :
4163 1101158 : gfc_gobble_whitespace ();
4164 1101158 : gfc_find_sym_tree (gfc_dt_upper_string (name), NULL, 1, &pdt_st);
4165 10990 : if (sym->attr.generic && pdt_st != NULL
4166 1110182 : && !(sym->generic->next && gfc_peek_ascii_char() != '('))
4167 : {
4168 8736 : gfc_symbol *pdt_sym;
4169 8736 : gfc_actual_arglist *ctr_arglist = NULL, *tmp;
4170 8736 : gfc_component *c;
4171 :
4172 : /* Use the template. */
4173 8736 : if (pdt_st->n.sym && pdt_st->n.sym->attr.pdt_template)
4174 : {
4175 987 : bool type_spec_list = false;
4176 987 : pdt_sym = pdt_st->n.sym;
4177 987 : gfc_gobble_whitespace ();
4178 : /* Look for a second actual arglist. If present, try the first
4179 : for the type parameters. Otherwise, or if there is no match,
4180 : depend on default values by setting the type parameters to
4181 : NULL. */
4182 987 : if (gfc_peek_ascii_char() == '(')
4183 213 : type_spec_list = true;
4184 987 : if (!actual_arglist && !type_spec_list)
4185 : {
4186 3 : gfc_error_now ("F2023 R755: The empty type specification at %C "
4187 : "is not allowed");
4188 3 : m = MATCH_ERROR;
4189 3 : break;
4190 : }
4191 : /* Generate this instance using the type parameters from the
4192 : first argument list and return the parameter list in
4193 : ctr_arglist. */
4194 984 : m = gfc_get_pdt_instance (actual_arglist, &pdt_sym, &ctr_arglist);
4195 984 : if (m != MATCH_YES || !ctr_arglist)
4196 : {
4197 43 : if (ctr_arglist)
4198 0 : gfc_free_actual_arglist (ctr_arglist);
4199 : /* See if all the type parameters have default values. */
4200 43 : m = gfc_get_pdt_instance (NULL, &pdt_sym, &ctr_arglist);
4201 43 : if (m != MATCH_YES)
4202 : {
4203 : m = MATCH_NO;
4204 : break;
4205 : }
4206 : }
4207 :
4208 : /* Now match the component_values if the type parameters were
4209 : present. */
4210 975 : if (type_spec_list)
4211 : {
4212 213 : m = gfc_match_actual_arglist (0, &actual_arglist);
4213 213 : if (m != MATCH_YES)
4214 : {
4215 : m = MATCH_ERROR;
4216 : break;
4217 : }
4218 : }
4219 :
4220 : /* Make sure that the component names are in place so that this
4221 : list can be safely appended to the type parameters. */
4222 975 : tmp = actual_arglist;
4223 3274 : for (c = pdt_sym->components; c && tmp; c = c->next)
4224 : {
4225 2299 : if (c->attr.pdt_kind || c->attr.pdt_len)
4226 1225 : continue;
4227 1074 : tmp->name = c->name;
4228 1074 : tmp = tmp->next;
4229 : }
4230 :
4231 975 : gfc_find_sym_tree (gfc_dt_lower_string (pdt_sym->name),
4232 : NULL, 1, &symtree);
4233 975 : if (!symtree)
4234 : {
4235 436 : gfc_get_ha_sym_tree (gfc_dt_lower_string (pdt_sym->name) ,
4236 : &symtree);
4237 436 : symtree->n.sym = pdt_sym;
4238 436 : symtree->n.sym->ts.u.derived = pdt_sym;
4239 436 : symtree->n.sym->ts.type = BT_DERIVED;
4240 : }
4241 :
4242 975 : if (type_spec_list)
4243 : {
4244 : /* Append the type_params and the component_values. */
4245 239 : for (tmp = ctr_arglist; tmp && tmp->next;)
4246 : tmp = tmp->next;
4247 213 : tmp->next = actual_arglist;
4248 213 : actual_arglist = ctr_arglist;
4249 213 : tmp = actual_arglist;
4250 : /* Can now add all the component names. */
4251 697 : for (c = pdt_sym->components; c && tmp; c = c->next)
4252 : {
4253 484 : tmp->name = c->name;
4254 484 : tmp = tmp->next;
4255 : }
4256 : }
4257 : }
4258 : }
4259 :
4260 1101146 : gfc_get_ha_sym_tree (name, &symtree); /* Can't fail */
4261 1101146 : sym = symtree->n.sym;
4262 :
4263 1101146 : replace_hidden_procptr_result (&sym, &symtree);
4264 :
4265 1101146 : e = gfc_get_expr ();
4266 1101146 : e->symtree = symtree;
4267 1101146 : e->expr_type = EXPR_FUNCTION;
4268 1101146 : e->value.function.actual = actual_arglist;
4269 1101146 : e->where = gfc_current_locus;
4270 :
4271 1101146 : if (sym->ts.type == BT_CLASS && sym->attr.class_ok
4272 206 : && CLASS_DATA (sym)->as)
4273 : {
4274 91 : e->rank = CLASS_DATA (sym)->as->rank;
4275 91 : e->corank = CLASS_DATA (sym)->as->corank;
4276 : }
4277 1101055 : else if (sym->as != NULL)
4278 : {
4279 1157 : e->rank = sym->as->rank;
4280 1157 : e->corank = sym->as->corank;
4281 : }
4282 :
4283 1101146 : if (!sym->attr.function
4284 1101146 : && !gfc_add_function (&sym->attr, sym->name, NULL))
4285 : {
4286 : m = MATCH_ERROR;
4287 : break;
4288 : }
4289 :
4290 : /* Check here for the existence of at least one argument for the
4291 : iso_c_binding functions C_LOC, C_FUNLOC, and C_ASSOCIATED. */
4292 1101146 : if (sym->attr.is_iso_c == 1
4293 2 : && (sym->from_intmod == INTMOD_ISO_C_BINDING
4294 2 : && (sym->intmod_sym_id == ISOCBINDING_LOC
4295 2 : || sym->intmod_sym_id == ISOCBINDING_F_C_STRING
4296 2 : || sym->intmod_sym_id == ISOCBINDING_FUNLOC
4297 2 : || sym->intmod_sym_id == ISOCBINDING_ASSOCIATED)))
4298 : {
4299 : /* make sure we were given a param */
4300 0 : if (actual_arglist == NULL)
4301 : {
4302 0 : gfc_error ("Missing argument to %qs at %C", sym->name);
4303 0 : m = MATCH_ERROR;
4304 0 : break;
4305 : }
4306 : }
4307 :
4308 1101146 : if (sym->result == NULL)
4309 390892 : sym->result = sym;
4310 :
4311 1101146 : gfc_gobble_whitespace ();
4312 : /* F08:C612. */
4313 1101146 : if (gfc_peek_ascii_char() == '%')
4314 : {
4315 12 : gfc_error ("The leftmost part-ref in a data-ref cannot be a "
4316 : "function reference at %C");
4317 12 : m = MATCH_ERROR;
4318 12 : break;
4319 : }
4320 :
4321 : m = MATCH_YES;
4322 : break;
4323 :
4324 288708 : case FL_UNKNOWN:
4325 :
4326 : /* Special case for derived type variables that get their types
4327 : via an IMPLICIT statement. This can't wait for the
4328 : resolution phase. */
4329 :
4330 288708 : old_loc = gfc_current_locus;
4331 288708 : if (gfc_match_member_sep (sym) == MATCH_YES
4332 10347 : && sym->ts.type == BT_UNKNOWN
4333 288714 : && gfc_get_default_type (sym->name, sym->ns)->type == BT_DERIVED)
4334 0 : gfc_set_default_type (sym, 0, sym->ns);
4335 288708 : gfc_current_locus = old_loc;
4336 :
4337 : /* If the symbol has a (co)dimension attribute, the expression is a
4338 : variable. */
4339 :
4340 288708 : if (sym->attr.dimension || sym->attr.codimension)
4341 : {
4342 35508 : if (!gfc_add_flavor (&sym->attr, FL_VARIABLE, sym->name, NULL))
4343 : {
4344 : m = MATCH_ERROR;
4345 : break;
4346 : }
4347 :
4348 35508 : e = gfc_get_expr ();
4349 35508 : e->symtree = symtree;
4350 35508 : e->expr_type = EXPR_VARIABLE;
4351 35508 : m = gfc_match_varspec (e, 0, false, true);
4352 35508 : break;
4353 : }
4354 :
4355 253200 : if (sym->ts.type == BT_CLASS && sym->attr.class_ok
4356 4844 : && (CLASS_DATA (sym)->attr.dimension
4357 3382 : || CLASS_DATA (sym)->attr.codimension))
4358 : {
4359 1559 : if (!gfc_add_flavor (&sym->attr, FL_VARIABLE, sym->name, NULL))
4360 : {
4361 : m = MATCH_ERROR;
4362 : break;
4363 : }
4364 :
4365 1559 : e = gfc_get_expr ();
4366 1559 : e->symtree = symtree;
4367 1559 : e->expr_type = EXPR_VARIABLE;
4368 1559 : m = gfc_match_varspec (e, 0, false, true);
4369 1559 : break;
4370 : }
4371 :
4372 : /* Name is not an array, so we peek to see if a '(' implies a
4373 : function call or a substring reference. Otherwise the
4374 : variable is just a scalar. */
4375 :
4376 251641 : gfc_gobble_whitespace ();
4377 251641 : if (gfc_peek_ascii_char () != '(')
4378 : {
4379 : /* Assume a scalar variable */
4380 76782 : e = gfc_get_expr ();
4381 76782 : e->symtree = symtree;
4382 76782 : e->expr_type = EXPR_VARIABLE;
4383 :
4384 76782 : if (!gfc_add_flavor (&sym->attr, FL_VARIABLE, sym->name, NULL))
4385 : {
4386 : m = MATCH_ERROR;
4387 : break;
4388 : }
4389 :
4390 : /*FIXME:??? gfc_match_varspec does set this for us: */
4391 76782 : e->ts = sym->ts;
4392 76782 : m = gfc_match_varspec (e, 0, false, true);
4393 76782 : break;
4394 : }
4395 :
4396 : /* See if this is a function reference with a keyword argument
4397 : as first argument. We do this because otherwise a spurious
4398 : symbol would end up in the symbol table. */
4399 :
4400 174859 : old_loc = gfc_current_locus;
4401 174859 : m2 = gfc_match (" ( %n =", argname);
4402 174859 : gfc_current_locus = old_loc;
4403 :
4404 174859 : e = gfc_get_expr ();
4405 174859 : e->symtree = symtree;
4406 :
4407 174859 : if (m2 != MATCH_YES)
4408 : {
4409 : /* Try to figure out whether we're dealing with a character type.
4410 : We're peeking ahead here, because we don't want to call
4411 : match_substring if we're dealing with an implicitly typed
4412 : non-character variable. */
4413 173775 : implicit_char = false;
4414 173775 : if (sym->ts.type == BT_UNKNOWN)
4415 : {
4416 169000 : ts = gfc_get_default_type (sym->name, NULL);
4417 169000 : if (ts->type == BT_CHARACTER)
4418 : implicit_char = true;
4419 : }
4420 :
4421 : /* See if this could possibly be a substring reference of a name
4422 : that we're not sure is a variable yet. */
4423 :
4424 173758 : if ((implicit_char || sym->ts.type == BT_CHARACTER)
4425 1449 : && match_substring (sym->ts.u.cl, 0, &e->ref, false) == MATCH_YES)
4426 : {
4427 :
4428 985 : e->expr_type = EXPR_VARIABLE;
4429 :
4430 985 : if (sym->attr.flavor != FL_VARIABLE
4431 985 : && !gfc_add_flavor (&sym->attr, FL_VARIABLE,
4432 : sym->name, NULL))
4433 : {
4434 : m = MATCH_ERROR;
4435 : break;
4436 : }
4437 :
4438 985 : if (sym->ts.type == BT_UNKNOWN
4439 985 : && !gfc_set_default_type (sym, 1, NULL))
4440 : {
4441 : m = MATCH_ERROR;
4442 : break;
4443 : }
4444 :
4445 985 : e->ts = sym->ts;
4446 985 : if (e->ref)
4447 960 : e->ts.u.cl = NULL;
4448 : m = MATCH_YES;
4449 : break;
4450 : }
4451 : }
4452 :
4453 : /* Give up, assume we have a function. */
4454 :
4455 173874 : gfc_get_sym_tree (name, NULL, &symtree, false); /* Can't fail */
4456 173874 : sym = symtree->n.sym;
4457 173874 : e->expr_type = EXPR_FUNCTION;
4458 :
4459 173874 : if (!sym->attr.function
4460 173874 : && !gfc_add_function (&sym->attr, sym->name, NULL))
4461 : {
4462 : m = MATCH_ERROR;
4463 : break;
4464 : }
4465 :
4466 173874 : sym->result = sym;
4467 :
4468 173874 : m = gfc_match_actual_arglist (0, &e->value.function.actual);
4469 173874 : if (m == MATCH_NO)
4470 0 : gfc_error ("Missing argument list in function %qs at %C", sym->name);
4471 :
4472 173874 : if (m != MATCH_YES)
4473 : {
4474 : m = MATCH_ERROR;
4475 : break;
4476 : }
4477 :
4478 : /* If our new function returns a character, array or structure
4479 : type, it might have subsequent references. */
4480 :
4481 173744 : m = gfc_match_varspec (e, 0, false, true);
4482 173744 : if (m == MATCH_NO)
4483 : m = MATCH_YES;
4484 :
4485 : break;
4486 :
4487 67892 : generic_function:
4488 : /* Look for symbol first; if not found, look for STRUCTURE type symbol
4489 : specially. Creates a generic symbol for derived types. */
4490 67892 : gfc_find_sym_tree (name, NULL, 1, &symtree);
4491 67892 : if (!symtree)
4492 0 : gfc_find_sym_tree (gfc_dt_upper_string (name), NULL, 1, &symtree);
4493 67892 : if (!symtree || symtree->n.sym->attr.flavor != FL_STRUCT)
4494 67892 : gfc_get_sym_tree (name, NULL, &symtree, false); /* Can't fail */
4495 :
4496 67892 : e = gfc_get_expr ();
4497 67892 : e->symtree = symtree;
4498 67892 : e->expr_type = EXPR_FUNCTION;
4499 :
4500 67892 : if (gfc_fl_struct (sym->attr.flavor))
4501 : {
4502 0 : e->value.function.esym = sym;
4503 0 : e->symtree->n.sym->attr.generic = 1;
4504 : }
4505 :
4506 67892 : m = gfc_match_actual_arglist (0, &e->value.function.actual);
4507 67892 : break;
4508 :
4509 : case FL_NAMELIST:
4510 : m = MATCH_ERROR;
4511 : break;
4512 :
4513 5 : default:
4514 5 : gfc_error ("Symbol at %C is not appropriate for an expression");
4515 5 : return MATCH_ERROR;
4516 : }
4517 :
4518 : /* Scan for possible inquiry references. */
4519 81 : if (m == MATCH_YES
4520 3413237 : && e->expr_type == EXPR_VARIABLE
4521 4189838 : && gfc_peek_ascii_char () == '%')
4522 : {
4523 14 : m = gfc_match_varspec (e, 0, false, false);
4524 14 : if (m == MATCH_NO)
4525 : m = MATCH_YES;
4526 : }
4527 :
4528 4047623 : if (m == MATCH_YES)
4529 : {
4530 3413237 : e->where = where;
4531 3413237 : *result = e;
4532 : }
4533 : else
4534 634386 : gfc_free_expr (e);
4535 :
4536 : return m;
4537 : }
4538 :
4539 :
4540 : /* Match a variable, i.e. something that can be assigned to. This
4541 : starts as a symbol, can be a structure component or an array
4542 : reference. It can be a function if the function doesn't have a
4543 : separate RESULT variable. If the symbol has not been previously
4544 : seen, we assume it is a variable.
4545 :
4546 : This function is called by two interface functions:
4547 : gfc_match_variable, which has host_flag = 1, and
4548 : gfc_match_equiv_variable, with host_flag = 0, to restrict the
4549 : match of the symbol to the local scope. */
4550 :
4551 : static match
4552 2856829 : match_variable (gfc_expr **result, int equiv_flag, int host_flag)
4553 : {
4554 2856829 : gfc_symbol *sym, *dt_sym;
4555 2856829 : gfc_symtree *st;
4556 2856829 : gfc_expr *expr;
4557 2856829 : locus where, old_loc;
4558 2856829 : match m;
4559 :
4560 2856829 : *result = NULL;
4561 :
4562 : /* Since nothing has any business being an lvalue in a module
4563 : specification block, an interface block or a contains section,
4564 : we force the changed_symbols mechanism to work by setting
4565 : host_flag to 0. This prevents valid symbols that have the name
4566 : of keywords, such as 'end', being turned into variables by
4567 : failed matching to assignments for, e.g., END INTERFACE. */
4568 2856829 : if (gfc_current_state () == COMP_MODULE
4569 2856829 : || gfc_current_state () == COMP_SUBMODULE
4570 : || gfc_current_state () == COMP_INTERFACE
4571 : || gfc_current_state () == COMP_CONTAINS)
4572 197288 : host_flag = 0;
4573 :
4574 2856829 : where = gfc_current_locus;
4575 2856829 : m = gfc_match_sym_tree (&st, host_flag);
4576 2856828 : if (m != MATCH_YES)
4577 : return m;
4578 :
4579 2856799 : sym = st->n.sym;
4580 :
4581 : /* If this is an implicit do loop index and implicitly typed,
4582 : it should not be host associated. */
4583 2856799 : m = check_for_implicit_index (&st, &sym);
4584 2856799 : if (m != MATCH_YES)
4585 : return m;
4586 :
4587 2856799 : sym->attr.implied_index = 0;
4588 :
4589 2856799 : gfc_set_sym_referenced (sym);
4590 :
4591 : /* STRUCTUREs may share names with variables, but derived types may not. */
4592 14408 : if (sym->attr.flavor == FL_PROCEDURE && sym->generic
4593 2856865 : && (dt_sym = gfc_find_dt_in_generic (sym)))
4594 : {
4595 5 : if (dt_sym->attr.flavor == FL_DERIVED)
4596 5 : gfc_error ("Derived type %qs cannot be used as a variable at %C",
4597 : sym->name);
4598 5 : return MATCH_ERROR;
4599 : }
4600 :
4601 2856794 : switch (sym->attr.flavor)
4602 : {
4603 : case FL_VARIABLE:
4604 : /* Everything is alright. */
4605 : break;
4606 :
4607 2572771 : case FL_UNKNOWN:
4608 2572771 : {
4609 2572771 : sym_flavor flavor = FL_UNKNOWN;
4610 :
4611 2572771 : gfc_gobble_whitespace ();
4612 :
4613 2572771 : if (sym->attr.external || sym->attr.procedure
4614 2572739 : || sym->attr.function || sym->attr.subroutine)
4615 : flavor = FL_PROCEDURE;
4616 :
4617 : /* If it is not a procedure, is not typed and is host associated,
4618 : we cannot give it a flavor yet. */
4619 2572739 : else if (sym->ns == gfc_current_ns->parent
4620 2871 : && sym->ts.type == BT_UNKNOWN)
4621 : break;
4622 :
4623 : /* These are definitive indicators that this is a variable. */
4624 3426627 : else if (gfc_peek_ascii_char () != '(' || sym->ts.type != BT_UNKNOWN
4625 3408741 : || sym->attr.pointer || sym->as != NULL)
4626 : flavor = FL_VARIABLE;
4627 :
4628 : if (flavor != FL_UNKNOWN
4629 1737369 : && !gfc_add_flavor (&sym->attr, flavor, sym->name, NULL))
4630 : return MATCH_ERROR;
4631 : }
4632 : break;
4633 :
4634 17 : case FL_PARAMETER:
4635 17 : if (equiv_flag)
4636 : {
4637 0 : gfc_error ("Named constant at %C in an EQUIVALENCE");
4638 0 : return MATCH_ERROR;
4639 : }
4640 17 : if (gfc_in_match_data())
4641 : {
4642 4 : gfc_error ("PARAMETER %qs shall not appear in a DATA statement at %C",
4643 : sym->name);
4644 4 : return MATCH_ERROR;
4645 : }
4646 : /* Otherwise this is checked for an error given in the
4647 : variable definition context checks. */
4648 : break;
4649 :
4650 14403 : case FL_PROCEDURE:
4651 : /* Check for a nonrecursive function result variable. */
4652 14403 : if (sym->attr.function
4653 12314 : && (!sym->attr.external || sym->abr_modproc_decl)
4654 11917 : && sym->result == sym
4655 25967 : && (gfc_is_function_return_value (sym, gfc_current_ns)
4656 2201 : || (sym->attr.entry
4657 499 : && sym->ns == gfc_current_ns)
4658 1709 : || (sym->attr.entry
4659 7 : && sym->ns == gfc_current_ns->parent)))
4660 : {
4661 : /* If a function result is a derived type, then the derived
4662 : type may still have to be resolved. */
4663 :
4664 9862 : if (sym->ts.type == BT_DERIVED
4665 9862 : && gfc_use_derived (sym->ts.u.derived) == NULL)
4666 : return MATCH_ERROR;
4667 : break;
4668 : }
4669 :
4670 4541 : if (sym->attr.proc_pointer
4671 4541 : || replace_hidden_procptr_result (&sym, &st))
4672 : break;
4673 :
4674 : /* Fall through to error */
4675 2872 : gcc_fallthrough ();
4676 :
4677 2872 : default:
4678 2872 : gfc_error ("%qs at %C is not a variable", sym->name);
4679 2872 : return MATCH_ERROR;
4680 : }
4681 :
4682 : /* Special case for derived type variables that get their types
4683 : via an IMPLICIT statement. This can't wait for the
4684 : resolution phase. */
4685 :
4686 2853914 : {
4687 2853914 : gfc_namespace * implicit_ns;
4688 :
4689 2853914 : if (gfc_current_ns->proc_name == sym)
4690 : implicit_ns = gfc_current_ns;
4691 : else
4692 2844929 : implicit_ns = sym->ns;
4693 :
4694 2853914 : old_loc = gfc_current_locus;
4695 2853914 : if (gfc_match_member_sep (sym) == MATCH_YES
4696 21428 : && sym->ts.type == BT_UNKNOWN
4697 2853926 : && gfc_get_default_type (sym->name, implicit_ns)->type == BT_DERIVED)
4698 3 : gfc_set_default_type (sym, 0, implicit_ns);
4699 2853914 : gfc_current_locus = old_loc;
4700 : }
4701 :
4702 2853914 : expr = gfc_get_expr ();
4703 :
4704 2853914 : expr->expr_type = EXPR_VARIABLE;
4705 2853914 : expr->symtree = st;
4706 2853914 : expr->ts = sym->ts;
4707 :
4708 : /* Now see if we have to do more. */
4709 2853914 : m = gfc_match_varspec (expr, equiv_flag, false, false);
4710 2853914 : if (m != MATCH_YES)
4711 : {
4712 83 : gfc_free_expr (expr);
4713 83 : return m;
4714 : }
4715 :
4716 2853831 : expr->where = gfc_get_location_range (NULL, 0, &where, 1, &gfc_current_locus);
4717 2853831 : *result = expr;
4718 2853831 : return MATCH_YES;
4719 : }
4720 :
4721 :
4722 : match
4723 2853882 : gfc_match_variable (gfc_expr **result, int equiv_flag)
4724 : {
4725 2853882 : return match_variable (result, equiv_flag, 1);
4726 : }
4727 :
4728 :
4729 : match
4730 2947 : gfc_match_equiv_variable (gfc_expr **result)
4731 : {
4732 2947 : return match_variable (result, 1, 0);
4733 : }
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