]>
Commit | Line | Data |
---|---|---|
6de9cd9a | 1 | /* Primary expression subroutines |
99dee823 | 2 | Copyright (C) 2000-2021 Free Software Foundation, Inc. |
6de9cd9a DN |
3 | Contributed by Andy Vaught |
4 | ||
d1d61a00 | 5 | This file is part of GCC. |
6de9cd9a | 6 | |
d1d61a00 TS |
7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free | |
d234d788 | 9 | Software Foundation; either version 3, or (at your option) any later |
d1d61a00 | 10 | version. |
6de9cd9a | 11 | |
d1d61a00 TS |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
6de9cd9a DN |
16 | |
17 | You should have received a copy of the GNU General Public License | |
d234d788 NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a | 20 | |
6de9cd9a DN |
21 | #include "config.h" |
22 | #include "system.h" | |
953bee7c | 23 | #include "coretypes.h" |
1916bcb5 | 24 | #include "options.h" |
6de9cd9a DN |
25 | #include "gfortran.h" |
26 | #include "arith.h" | |
27 | #include "match.h" | |
28 | #include "parse.h" | |
b7e75771 | 29 | #include "constructor.h" |
6de9cd9a | 30 | |
837c4b78 JW |
31 | int matching_actual_arglist = 0; |
32 | ||
6de9cd9a DN |
33 | /* Matches a kind-parameter expression, which is either a named |
34 | symbolic constant or a nonnegative integer constant. If | |
bee64a2b JW |
35 | successful, sets the kind value to the correct integer. |
36 | The argument 'is_iso_c' signals whether the kind is an ISO_C_BINDING | |
37 | symbol like e.g. 'c_int'. */ | |
6de9cd9a DN |
38 | |
39 | static match | |
bee64a2b | 40 | match_kind_param (int *kind, int *is_iso_c) |
6de9cd9a DN |
41 | { |
42 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
43 | gfc_symbol *sym; | |
6de9cd9a DN |
44 | match m; |
45 | ||
bee64a2b JW |
46 | *is_iso_c = 0; |
47 | ||
5cf54585 | 48 | m = gfc_match_small_literal_int (kind, NULL); |
6de9cd9a DN |
49 | if (m != MATCH_NO) |
50 | return m; | |
51 | ||
52 | m = gfc_match_name (name); | |
53 | if (m != MATCH_YES) | |
54 | return m; | |
55 | ||
56 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
57 | return MATCH_ERROR; | |
58 | ||
59 | if (sym == NULL) | |
60 | return MATCH_NO; | |
61 | ||
fbe468a5 JW |
62 | *is_iso_c = sym->attr.is_iso_c; |
63 | ||
6de9cd9a DN |
64 | if (sym->attr.flavor != FL_PARAMETER) |
65 | return MATCH_NO; | |
66 | ||
1d8e1d5d PT |
67 | if (sym->value == NULL) |
68 | return MATCH_NO; | |
69 | ||
51f03c6b | 70 | if (gfc_extract_int (sym->value, kind)) |
6de9cd9a DN |
71 | return MATCH_NO; |
72 | ||
a39fafac FXC |
73 | gfc_set_sym_referenced (sym); |
74 | ||
6de9cd9a DN |
75 | 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: | |
bee64a2b JW |
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'. */ | |
6de9cd9a DN |
89 | |
90 | static int | |
bee64a2b | 91 | get_kind (int *is_iso_c) |
6de9cd9a DN |
92 | { |
93 | int kind; | |
94 | match m; | |
95 | ||
bee64a2b JW |
96 | *is_iso_c = 0; |
97 | ||
6de9cd9a DN |
98 | if (gfc_match_char ('_') != MATCH_YES) |
99 | return -2; | |
100 | ||
bee64a2b | 101 | m = match_kind_param (&kind, is_iso_c); |
6de9cd9a DN |
102 | if (m == MATCH_NO) |
103 | gfc_error ("Missing kind-parameter at %C"); | |
104 | ||
105 | 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 | ||
8fc541d3 FXC |
112 | int |
113 | gfc_check_digit (char c, int radix) | |
6de9cd9a DN |
114 | { |
115 | int r; | |
116 | ||
117 | switch (radix) | |
118 | { | |
119 | case 2: | |
120 | r = ('0' <= c && c <= '1'); | |
121 | break; | |
122 | ||
123 | case 8: | |
124 | r = ('0' <= c && c <= '7'); | |
125 | break; | |
126 | ||
127 | case 10: | |
128 | r = ('0' <= c && c <= '9'); | |
129 | break; | |
130 | ||
131 | case 16: | |
da8309c6 | 132 | r = ISXDIGIT (c); |
6de9cd9a DN |
133 | break; |
134 | ||
135 | default: | |
8fc541d3 | 136 | gfc_internal_error ("gfc_check_digit(): bad radix"); |
6de9cd9a DN |
137 | } |
138 | ||
139 | return r; | |
140 | } | |
141 | ||
142 | ||
143 | /* Match the digit string part of an integer if signflag is not set, | |
bf1b77dd PT |
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 | |
6de9cd9a DN |
146 | the number of characters matched, -1 for no match. */ |
147 | ||
148 | static int | |
149 | match_digits (int signflag, int radix, char *buffer) | |
150 | { | |
151 | locus old_loc; | |
8fc541d3 FXC |
152 | int length; |
153 | char c; | |
6de9cd9a DN |
154 | |
155 | length = 0; | |
8fc541d3 | 156 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
157 | |
158 | if (signflag && (c == '+' || c == '-')) | |
159 | { | |
160 | if (buffer != NULL) | |
161 | *buffer++ = c; | |
69029c61 | 162 | gfc_gobble_whitespace (); |
8fc541d3 | 163 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
164 | length++; |
165 | } | |
166 | ||
8fc541d3 | 167 | if (!gfc_check_digit (c, radix)) |
6de9cd9a DN |
168 | return -1; |
169 | ||
170 | length++; | |
171 | if (buffer != NULL) | |
172 | *buffer++ = c; | |
173 | ||
174 | for (;;) | |
175 | { | |
63645982 | 176 | old_loc = gfc_current_locus; |
8fc541d3 | 177 | c = gfc_next_ascii_char (); |
6de9cd9a | 178 | |
8fc541d3 | 179 | if (!gfc_check_digit (c, radix)) |
6de9cd9a DN |
180 | break; |
181 | ||
182 | if (buffer != NULL) | |
183 | *buffer++ = c; | |
184 | length++; | |
185 | } | |
186 | ||
63645982 | 187 | gfc_current_locus = old_loc; |
6de9cd9a DN |
188 | |
189 | return length; | |
190 | } | |
191 | ||
8dc63166 SK |
192 | /* Convert an integer string to an expression node. */ |
193 | ||
194 | static gfc_expr * | |
195 | convert_integer (const char *buffer, int kind, int radix, locus *where) | |
196 | { | |
197 | gfc_expr *e; | |
198 | const char *t; | |
199 | ||
200 | e = gfc_get_constant_expr (BT_INTEGER, kind, where); | |
201 | /* A leading plus is allowed, but not by mpz_set_str. */ | |
202 | if (buffer[0] == '+') | |
203 | t = buffer + 1; | |
204 | else | |
205 | t = buffer; | |
206 | mpz_set_str (e->value.integer, t, radix); | |
207 | ||
208 | return e; | |
209 | } | |
210 | ||
211 | ||
212 | /* Convert a real string to an expression node. */ | |
213 | ||
214 | static gfc_expr * | |
215 | convert_real (const char *buffer, int kind, locus *where) | |
216 | { | |
217 | gfc_expr *e; | |
218 | ||
219 | e = gfc_get_constant_expr (BT_REAL, kind, where); | |
220 | mpfr_set_str (e->value.real, buffer, 10, GFC_RND_MODE); | |
221 | ||
222 | return e; | |
223 | } | |
224 | ||
225 | ||
226 | /* Convert a pair of real, constant expression nodes to a single | |
227 | complex expression node. */ | |
228 | ||
229 | static gfc_expr * | |
230 | convert_complex (gfc_expr *real, gfc_expr *imag, int kind) | |
231 | { | |
232 | gfc_expr *e; | |
233 | ||
234 | e = gfc_get_constant_expr (BT_COMPLEX, kind, &real->where); | |
235 | mpc_set_fr_fr (e->value.complex, real->value.real, imag->value.real, | |
236 | GFC_MPC_RND_MODE); | |
237 | ||
238 | return e; | |
239 | } | |
240 | ||
6de9cd9a | 241 | |
bf1b77dd | 242 | /* Match an integer (digit string and optional kind). |
6de9cd9a DN |
243 | A sign will be accepted if signflag is set. */ |
244 | ||
245 | static match | |
edf1eac2 | 246 | match_integer_constant (gfc_expr **result, int signflag) |
6de9cd9a | 247 | { |
bee64a2b | 248 | int length, kind, is_iso_c; |
6de9cd9a DN |
249 | locus old_loc; |
250 | char *buffer; | |
251 | gfc_expr *e; | |
252 | ||
63645982 | 253 | old_loc = gfc_current_locus; |
6de9cd9a DN |
254 | gfc_gobble_whitespace (); |
255 | ||
256 | length = match_digits (signflag, 10, NULL); | |
63645982 | 257 | gfc_current_locus = old_loc; |
6de9cd9a DN |
258 | if (length == -1) |
259 | return MATCH_NO; | |
260 | ||
ece3f663 | 261 | buffer = (char *) alloca (length + 1); |
6de9cd9a DN |
262 | memset (buffer, '\0', length + 1); |
263 | ||
264 | gfc_gobble_whitespace (); | |
265 | ||
266 | match_digits (signflag, 10, buffer); | |
267 | ||
bee64a2b | 268 | kind = get_kind (&is_iso_c); |
6de9cd9a | 269 | if (kind == -2) |
9d64df18 | 270 | kind = gfc_default_integer_kind; |
6de9cd9a DN |
271 | if (kind == -1) |
272 | return MATCH_ERROR; | |
273 | ||
203c7ebf | 274 | if (kind == 4 && flag_integer4_kind == 8) |
f4347334 ZG |
275 | kind = 8; |
276 | ||
e7a2d5fb | 277 | if (gfc_validate_kind (BT_INTEGER, kind, true) < 0) |
6de9cd9a DN |
278 | { |
279 | gfc_error ("Integer kind %d at %C not available", kind); | |
280 | return MATCH_ERROR; | |
281 | } | |
282 | ||
8dc63166 | 283 | e = convert_integer (buffer, kind, 10, &gfc_current_locus); |
bee64a2b | 284 | e->ts.is_c_interop = is_iso_c; |
6de9cd9a DN |
285 | |
286 | if (gfc_range_check (e) != ARITH_OK) | |
287 | { | |
b2458f91 | 288 | gfc_error ("Integer too big for its kind at %C. This check can be " |
a3f9f006 | 289 | "disabled with the option %<-fno-range-check%>"); |
6de9cd9a DN |
290 | |
291 | gfc_free_expr (e); | |
292 | return MATCH_ERROR; | |
293 | } | |
294 | ||
295 | *result = e; | |
296 | return MATCH_YES; | |
297 | } | |
298 | ||
299 | ||
d3642f89 FW |
300 | /* Match a Hollerith constant. */ |
301 | ||
302 | static match | |
edf1eac2 | 303 | match_hollerith_constant (gfc_expr **result) |
d3642f89 FW |
304 | { |
305 | locus old_loc; | |
edf1eac2 | 306 | gfc_expr *e = NULL; |
401fcd3b | 307 | int num, pad; |
bf1b77dd | 308 | int i; |
d3642f89 FW |
309 | |
310 | old_loc = gfc_current_locus; | |
311 | gfc_gobble_whitespace (); | |
312 | ||
313 | if (match_integer_constant (&e, 0) == MATCH_YES | |
edf1eac2 | 314 | && gfc_match_char ('h') == MATCH_YES) |
d3642f89 | 315 | { |
524af0d6 | 316 | if (!gfc_notify_std (GFC_STD_LEGACY, "Hollerith constant at %C")) |
d3642f89 FW |
317 | goto cleanup; |
318 | ||
51f03c6b JJ |
319 | if (gfc_extract_int (e, &num, 1)) |
320 | goto cleanup; | |
d3642f89 FW |
321 | if (num == 0) |
322 | { | |
edf1eac2 SK |
323 | gfc_error ("Invalid Hollerith constant: %L must contain at least " |
324 | "one character", &old_loc); | |
d3642f89 FW |
325 | goto cleanup; |
326 | } | |
327 | if (e->ts.kind != gfc_default_integer_kind) | |
328 | { | |
eb6d74fa | 329 | gfc_error ("Invalid Hollerith constant: Integer kind at %L " |
edf1eac2 | 330 | "should be default", &old_loc); |
d3642f89 FW |
331 | goto cleanup; |
332 | } | |
333 | else | |
334 | { | |
d3642f89 | 335 | gfc_free_expr (e); |
b7e75771 JD |
336 | e = gfc_get_constant_expr (BT_HOLLERITH, gfc_default_character_kind, |
337 | &gfc_current_locus); | |
20585ad6 | 338 | |
401fcd3b JD |
339 | /* Calculate padding needed to fit default integer memory. */ |
340 | pad = gfc_default_integer_kind - (num % gfc_default_integer_kind); | |
341 | ||
342 | e->representation.string = XCNEWVEC (char, num + pad + 1); | |
8fc541d3 | 343 | |
20585ad6 | 344 | for (i = 0; i < num; i++) |
00660189 | 345 | { |
696abb30 | 346 | gfc_char_t c = gfc_next_char_literal (INSTRING_WARN); |
00660189 FXC |
347 | if (! gfc_wide_fits_in_byte (c)) |
348 | { | |
349 | gfc_error ("Invalid Hollerith constant at %L contains a " | |
350 | "wide character", &old_loc); | |
351 | goto cleanup; | |
352 | } | |
353 | ||
354 | e->representation.string[i] = (unsigned char) c; | |
355 | } | |
8fc541d3 | 356 | |
401fcd3b JD |
357 | /* Now pad with blanks and end with a null char. */ |
358 | for (i = 0; i < pad; i++) | |
359 | e->representation.string[num + i] = ' '; | |
360 | ||
361 | e->representation.string[num + i] = '\0'; | |
362 | e->representation.length = num + pad; | |
363 | e->ts.u.pad = pad; | |
20585ad6 | 364 | |
d3642f89 FW |
365 | *result = e; |
366 | return MATCH_YES; | |
367 | } | |
368 | } | |
369 | ||
370 | gfc_free_expr (e); | |
371 | gfc_current_locus = old_loc; | |
372 | return MATCH_NO; | |
373 | ||
374 | cleanup: | |
375 | gfc_free_expr (e); | |
376 | return MATCH_ERROR; | |
377 | } | |
378 | ||
379 | ||
6de9cd9a | 380 | /* Match a binary, octal or hexadecimal constant that can be found in |
78019d16 SK |
381 | a DATA statement. The standard permits b'010...', o'73...', and |
382 | z'a1...' where b, o, and z can be capital letters. This function | |
383 | also accepts postfixed forms of the constants: '01...'b, '73...'o, | |
384 | and 'a1...'z. An additional extension is the use of x for z. */ | |
6de9cd9a DN |
385 | |
386 | static match | |
edf1eac2 | 387 | match_boz_constant (gfc_expr **result) |
6de9cd9a | 388 | { |
8dc63166 | 389 | int radix, length, x_hex; |
78019d16 | 390 | locus old_loc, start_loc; |
8fc541d3 | 391 | char *buffer, post, delim; |
6de9cd9a | 392 | gfc_expr *e; |
6de9cd9a | 393 | |
78019d16 | 394 | start_loc = old_loc = gfc_current_locus; |
6de9cd9a DN |
395 | gfc_gobble_whitespace (); |
396 | ||
88199e7c | 397 | x_hex = 0; |
8fc541d3 | 398 | switch (post = gfc_next_ascii_char ()) |
6de9cd9a DN |
399 | { |
400 | case 'b': | |
401 | radix = 2; | |
78019d16 | 402 | post = 0; |
6de9cd9a DN |
403 | break; |
404 | case 'o': | |
405 | radix = 8; | |
78019d16 | 406 | post = 0; |
6de9cd9a DN |
407 | break; |
408 | case 'x': | |
88199e7c | 409 | x_hex = 1; |
6de9cd9a DN |
410 | /* Fall through. */ |
411 | case 'z': | |
412 | radix = 16; | |
78019d16 SK |
413 | post = 0; |
414 | break; | |
415 | case '\'': | |
416 | /* Fall through. */ | |
417 | case '\"': | |
418 | delim = post; | |
419 | post = 1; | |
420 | radix = 16; /* Set to accept any valid digit string. */ | |
6de9cd9a DN |
421 | break; |
422 | default: | |
423 | goto backup; | |
424 | } | |
425 | ||
426 | /* No whitespace allowed here. */ | |
427 | ||
78019d16 | 428 | if (post == 0) |
8fc541d3 | 429 | delim = gfc_next_ascii_char (); |
78019d16 | 430 | |
6de9cd9a DN |
431 | if (delim != '\'' && delim != '\"') |
432 | goto backup; | |
433 | ||
00a4618b | 434 | if (x_hex |
0a7183f6 ME |
435 | && gfc_invalid_boz (G_("Hexadecimal constant at %L uses " |
436 | "nonstandard X instead of Z"), &gfc_current_locus)) | |
8dc63166 | 437 | return MATCH_ERROR; |
5d874166 | 438 | |
63645982 | 439 | old_loc = gfc_current_locus; |
6de9cd9a DN |
440 | |
441 | length = match_digits (0, radix, NULL); | |
442 | if (length == -1) | |
443 | { | |
78019d16 | 444 | gfc_error ("Empty set of digits in BOZ constant at %C"); |
6de9cd9a DN |
445 | return MATCH_ERROR; |
446 | } | |
447 | ||
8fc541d3 | 448 | if (gfc_next_ascii_char () != delim) |
6de9cd9a | 449 | { |
78019d16 SK |
450 | gfc_error ("Illegal character in BOZ constant at %C"); |
451 | return MATCH_ERROR; | |
452 | } | |
453 | ||
454 | if (post == 1) | |
455 | { | |
8fc541d3 | 456 | switch (gfc_next_ascii_char ()) |
78019d16 SK |
457 | { |
458 | case 'b': | |
459 | radix = 2; | |
21dac32c | 460 | break; |
78019d16 SK |
461 | case 'o': |
462 | radix = 8; | |
21dac32c | 463 | break; |
78019d16 SK |
464 | case 'x': |
465 | /* Fall through. */ | |
466 | case 'z': | |
467 | radix = 16; | |
21dac32c | 468 | break; |
31043f6c | 469 | default: |
78019d16 | 470 | goto backup; |
31043f6c | 471 | } |
0bf0efd5 | 472 | |
0a7183f6 ME |
473 | if (gfc_invalid_boz (G_("BOZ constant at %C uses nonstandard postfix " |
474 | "syntax"), &gfc_current_locus)) | |
0bf0efd5 | 475 | return MATCH_ERROR; |
6de9cd9a DN |
476 | } |
477 | ||
63645982 | 478 | gfc_current_locus = old_loc; |
6de9cd9a | 479 | |
ece3f663 | 480 | buffer = (char *) alloca (length + 1); |
6de9cd9a DN |
481 | memset (buffer, '\0', length + 1); |
482 | ||
483 | match_digits (0, radix, buffer); | |
8fc541d3 | 484 | gfc_next_ascii_char (); /* Eat delimiter. */ |
78019d16 | 485 | if (post == 1) |
8fc541d3 | 486 | gfc_next_ascii_char (); /* Eat postfixed b, o, z, or x. */ |
6de9cd9a | 487 | |
8dc63166 SK |
488 | e = gfc_get_expr (); |
489 | e->expr_type = EXPR_CONSTANT; | |
490 | e->ts.type = BT_BOZ; | |
491 | e->where = gfc_current_locus; | |
492 | e->boz.rdx = radix; | |
493 | e->boz.len = length; | |
494 | e->boz.str = XCNEWVEC (char, length + 1); | |
495 | strncpy (e->boz.str, buffer, length); | |
88199e7c | 496 | |
0bf0efd5 | 497 | if (!gfc_in_match_data () |
524af0d6 | 498 | && (!gfc_notify_std(GFC_STD_F2003, "BOZ used outside a DATA " |
8dc63166 SK |
499 | "statement at %L", &e->where))) |
500 | return MATCH_ERROR; | |
0bf0efd5 | 501 | |
6de9cd9a DN |
502 | *result = e; |
503 | return MATCH_YES; | |
504 | ||
505 | backup: | |
78019d16 | 506 | gfc_current_locus = start_loc; |
6de9cd9a DN |
507 | return MATCH_NO; |
508 | } | |
509 | ||
510 | ||
69029c61 | 511 | /* Match a real constant of some sort. Allow a signed constant if signflag |
00a4618b | 512 | is nonzero. */ |
6de9cd9a DN |
513 | |
514 | static match | |
edf1eac2 | 515 | match_real_constant (gfc_expr **result, int signflag) |
6de9cd9a | 516 | { |
6869e9c6 | 517 | int kind, count, seen_dp, seen_digits, is_iso_c, default_exponent; |
6de9cd9a | 518 | locus old_loc, temp_loc; |
8fc541d3 | 519 | char *p, *buffer, c, exp_char; |
6de9cd9a | 520 | gfc_expr *e; |
69029c61 | 521 | bool negate; |
6de9cd9a | 522 | |
63645982 | 523 | old_loc = gfc_current_locus; |
6de9cd9a DN |
524 | gfc_gobble_whitespace (); |
525 | ||
526 | e = NULL; | |
527 | ||
6869e9c6 | 528 | default_exponent = 0; |
6de9cd9a DN |
529 | count = 0; |
530 | seen_dp = 0; | |
531 | seen_digits = 0; | |
532 | exp_char = ' '; | |
69029c61 | 533 | negate = FALSE; |
6de9cd9a | 534 | |
8fc541d3 | 535 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
536 | if (signflag && (c == '+' || c == '-')) |
537 | { | |
69029c61 PB |
538 | if (c == '-') |
539 | negate = TRUE; | |
540 | ||
541 | gfc_gobble_whitespace (); | |
8fc541d3 | 542 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
543 | } |
544 | ||
02712c16 | 545 | /* Scan significand. */ |
8fc541d3 | 546 | for (;; c = gfc_next_ascii_char (), count++) |
6de9cd9a DN |
547 | { |
548 | if (c == '.') | |
549 | { | |
550 | if (seen_dp) | |
551 | goto done; | |
552 | ||
bf1b77dd | 553 | /* Check to see if "." goes with a following operator like |
edf1eac2 | 554 | ".eq.". */ |
63645982 | 555 | temp_loc = gfc_current_locus; |
8fc541d3 | 556 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
557 | |
558 | if (c == 'e' || c == 'd' || c == 'q') | |
559 | { | |
8fc541d3 | 560 | c = gfc_next_ascii_char (); |
6de9cd9a | 561 | if (c == '.') |
f7b529fa | 562 | goto done; /* Operator named .e. or .d. */ |
6de9cd9a DN |
563 | } |
564 | ||
565 | if (ISALPHA (c)) | |
566 | goto done; /* Distinguish 1.e9 from 1.eq.2 */ | |
567 | ||
63645982 | 568 | gfc_current_locus = temp_loc; |
6de9cd9a DN |
569 | seen_dp = 1; |
570 | continue; | |
571 | } | |
572 | ||
573 | if (ISDIGIT (c)) | |
574 | { | |
575 | seen_digits = 1; | |
576 | continue; | |
577 | } | |
578 | ||
579 | break; | |
580 | } | |
581 | ||
edf1eac2 | 582 | if (!seen_digits || (c != 'e' && c != 'd' && c != 'q')) |
6de9cd9a DN |
583 | goto done; |
584 | exp_char = c; | |
585 | ||
5a17346a SK |
586 | |
587 | if (c == 'q') | |
588 | { | |
524af0d6 JB |
589 | if (!gfc_notify_std (GFC_STD_GNU, "exponent-letter 'q' in " |
590 | "real-literal-constant at %C")) | |
5a17346a | 591 | return MATCH_ERROR; |
73e42eef | 592 | else if (warn_real_q_constant) |
48749dbc MLI |
593 | gfc_warning (OPT_Wreal_q_constant, |
594 | "Extension: exponent-letter %<q%> in real-literal-constant " | |
595 | "at %C"); | |
5a17346a SK |
596 | } |
597 | ||
6de9cd9a | 598 | /* Scan exponent. */ |
8fc541d3 | 599 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
600 | count++; |
601 | ||
602 | if (c == '+' || c == '-') | |
603 | { /* optional sign */ | |
8fc541d3 | 604 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
605 | count++; |
606 | } | |
607 | ||
608 | if (!ISDIGIT (c)) | |
609 | { | |
6869e9c6 FR |
610 | /* With -fdec, default exponent to 0 instead of complaining. */ |
611 | if (flag_dec) | |
612 | default_exponent = 1; | |
613 | else | |
614 | { | |
615 | gfc_error ("Missing exponent in real number at %C"); | |
616 | return MATCH_ERROR; | |
617 | } | |
6de9cd9a DN |
618 | } |
619 | ||
620 | while (ISDIGIT (c)) | |
621 | { | |
8fc541d3 | 622 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
623 | count++; |
624 | } | |
625 | ||
626 | done: | |
69029c61 | 627 | /* Check that we have a numeric constant. */ |
6de9cd9a DN |
628 | if (!seen_digits || (!seen_dp && exp_char == ' ')) |
629 | { | |
63645982 | 630 | gfc_current_locus = old_loc; |
6de9cd9a DN |
631 | return MATCH_NO; |
632 | } | |
633 | ||
634 | /* Convert the number. */ | |
63645982 | 635 | gfc_current_locus = old_loc; |
6de9cd9a DN |
636 | gfc_gobble_whitespace (); |
637 | ||
6869e9c6 FR |
638 | buffer = (char *) alloca (count + default_exponent + 1); |
639 | memset (buffer, '\0', count + default_exponent + 1); | |
6de9cd9a | 640 | |
6de9cd9a | 641 | p = buffer; |
8fc541d3 | 642 | c = gfc_next_ascii_char (); |
69029c61 | 643 | if (c == '+' || c == '-') |
6de9cd9a | 644 | { |
69029c61 | 645 | gfc_gobble_whitespace (); |
8fc541d3 | 646 | c = gfc_next_ascii_char (); |
69029c61 PB |
647 | } |
648 | ||
649 | /* Hack for mpfr_set_str(). */ | |
650 | for (;;) | |
651 | { | |
652 | if (c == 'd' || c == 'q') | |
6de9cd9a | 653 | *p = 'e'; |
69029c61 PB |
654 | else |
655 | *p = c; | |
6de9cd9a | 656 | p++; |
69029c61 PB |
657 | if (--count == 0) |
658 | break; | |
659 | ||
8fc541d3 | 660 | c = gfc_next_ascii_char (); |
6de9cd9a | 661 | } |
6869e9c6 FR |
662 | if (default_exponent) |
663 | *p++ = '0'; | |
6de9cd9a | 664 | |
bee64a2b | 665 | kind = get_kind (&is_iso_c); |
6de9cd9a DN |
666 | if (kind == -1) |
667 | goto cleanup; | |
668 | ||
80cf2fac TB |
669 | if (kind == 4) |
670 | { | |
671 | if (flag_real4_kind == 8) | |
672 | kind = 8; | |
673 | if (flag_real4_kind == 10) | |
674 | kind = 10; | |
675 | if (flag_real4_kind == 16) | |
676 | kind = 16; | |
677 | } | |
678 | else if (kind == 8) | |
679 | { | |
680 | if (flag_real8_kind == 4) | |
681 | kind = 4; | |
682 | if (flag_real8_kind == 10) | |
683 | kind = 10; | |
684 | if (flag_real8_kind == 16) | |
685 | kind = 16; | |
686 | } | |
687 | ||
6de9cd9a DN |
688 | switch (exp_char) |
689 | { | |
690 | case 'd': | |
691 | if (kind != -2) | |
692 | { | |
a4d9b221 | 693 | gfc_error ("Real number at %C has a %<d%> exponent and an explicit " |
edf1eac2 | 694 | "kind"); |
6de9cd9a DN |
695 | goto cleanup; |
696 | } | |
9d64df18 | 697 | kind = gfc_default_double_kind; |
6de9cd9a DN |
698 | break; |
699 | ||
5a17346a SK |
700 | case 'q': |
701 | if (kind != -2) | |
702 | { | |
a4d9b221 | 703 | gfc_error ("Real number at %C has a %<q%> exponent and an explicit " |
5a17346a SK |
704 | "kind"); |
705 | goto cleanup; | |
706 | } | |
707 | ||
708 | /* The maximum possible real kind type parameter is 16. First, try | |
709 | that for the kind, then fallback to trying kind=10 (Intel 80 bit) | |
710 | extended precision. If neither value works, just given up. */ | |
711 | kind = 16; | |
712 | if (gfc_validate_kind (BT_REAL, kind, true) < 0) | |
713 | { | |
714 | kind = 10; | |
715 | if (gfc_validate_kind (BT_REAL, kind, true) < 0) | |
716 | { | |
a4d9b221 | 717 | gfc_error ("Invalid exponent-letter %<q%> in " |
5a17346a SK |
718 | "real-literal-constant at %C"); |
719 | goto cleanup; | |
720 | } | |
721 | } | |
722 | break; | |
723 | ||
6de9cd9a DN |
724 | default: |
725 | if (kind == -2) | |
9d64df18 | 726 | kind = gfc_default_real_kind; |
6de9cd9a | 727 | |
e7a2d5fb | 728 | if (gfc_validate_kind (BT_REAL, kind, true) < 0) |
6de9cd9a DN |
729 | { |
730 | gfc_error ("Invalid real kind %d at %C", kind); | |
731 | goto cleanup; | |
732 | } | |
733 | } | |
734 | ||
8dc63166 | 735 | e = convert_real (buffer, kind, &gfc_current_locus); |
69029c61 PB |
736 | if (negate) |
737 | mpfr_neg (e->value.real, e->value.real, GFC_RND_MODE); | |
bee64a2b | 738 | e->ts.is_c_interop = is_iso_c; |
6de9cd9a DN |
739 | |
740 | switch (gfc_range_check (e)) | |
741 | { | |
742 | case ARITH_OK: | |
743 | break; | |
744 | case ARITH_OVERFLOW: | |
745 | gfc_error ("Real constant overflows its kind at %C"); | |
746 | goto cleanup; | |
747 | ||
748 | case ARITH_UNDERFLOW: | |
73e42eef | 749 | if (warn_underflow) |
48749dbc | 750 | gfc_warning (OPT_Wunderflow, "Real constant underflows its kind at %C"); |
f8e566e5 | 751 | mpfr_set_ui (e->value.real, 0, GFC_RND_MODE); |
2d8b59df | 752 | break; |
6de9cd9a DN |
753 | |
754 | default: | |
755 | gfc_internal_error ("gfc_range_check() returned bad value"); | |
756 | } | |
757 | ||
cbf560d7 TK |
758 | /* Warn about trailing digits which suggest the user added too many |
759 | trailing digits, which may cause the appearance of higher pecision | |
760 | than the kind kan support. | |
761 | ||
762 | This is done by replacing the rightmost non-zero digit with zero | |
763 | and comparing with the original value. If these are equal, we | |
764 | assume the user supplied more digits than intended (or forgot to | |
765 | convert to the correct kind). | |
766 | */ | |
767 | ||
768 | if (warn_conversion_extra) | |
769 | { | |
770 | mpfr_t r; | |
5dbe01a1 | 771 | char *c1; |
cbf560d7 TK |
772 | bool did_break; |
773 | ||
5dbe01a1 BE |
774 | c1 = strchr (buffer, 'e'); |
775 | if (c1 == NULL) | |
776 | c1 = buffer + strlen(buffer); | |
cbf560d7 TK |
777 | |
778 | did_break = false; | |
5dbe01a1 | 779 | for (p = c1; p > buffer;) |
cbf560d7 | 780 | { |
5dbe01a1 | 781 | p--; |
cbf560d7 TK |
782 | if (*p == '.') |
783 | continue; | |
38217d3e | 784 | |
cbf560d7 TK |
785 | if (*p != '0') |
786 | { | |
787 | *p = '0'; | |
788 | did_break = true; | |
789 | break; | |
790 | } | |
791 | } | |
792 | ||
793 | if (did_break) | |
794 | { | |
795 | mpfr_init (r); | |
796 | mpfr_set_str (r, buffer, 10, GFC_RND_MODE); | |
797 | if (negate) | |
798 | mpfr_neg (r, r, GFC_RND_MODE); | |
799 | ||
800 | mpfr_sub (r, r, e->value.real, GFC_RND_MODE); | |
801 | ||
802 | if (mpfr_cmp_ui (r, 0) == 0) | |
803 | gfc_warning (OPT_Wconversion_extra, "Non-significant digits " | |
804 | "in %qs number at %C, maybe incorrect KIND", | |
805 | gfc_typename (&e->ts)); | |
806 | ||
807 | mpfr_clear (r); | |
808 | } | |
809 | } | |
810 | ||
6de9cd9a DN |
811 | *result = e; |
812 | return MATCH_YES; | |
813 | ||
814 | cleanup: | |
815 | gfc_free_expr (e); | |
816 | return MATCH_ERROR; | |
817 | } | |
818 | ||
819 | ||
820 | /* Match a substring reference. */ | |
821 | ||
822 | static match | |
38217d3e | 823 | match_substring (gfc_charlen *cl, int init, gfc_ref **result, bool deferred) |
6de9cd9a DN |
824 | { |
825 | gfc_expr *start, *end; | |
826 | locus old_loc; | |
827 | gfc_ref *ref; | |
828 | match m; | |
829 | ||
830 | start = NULL; | |
831 | end = NULL; | |
832 | ||
63645982 | 833 | old_loc = gfc_current_locus; |
6de9cd9a DN |
834 | |
835 | m = gfc_match_char ('('); | |
836 | if (m != MATCH_YES) | |
837 | return MATCH_NO; | |
838 | ||
839 | if (gfc_match_char (':') != MATCH_YES) | |
840 | { | |
841 | if (init) | |
842 | m = gfc_match_init_expr (&start); | |
843 | else | |
844 | m = gfc_match_expr (&start); | |
845 | ||
846 | if (m != MATCH_YES) | |
847 | { | |
848 | m = MATCH_NO; | |
849 | goto cleanup; | |
850 | } | |
851 | ||
852 | m = gfc_match_char (':'); | |
853 | if (m != MATCH_YES) | |
854 | goto cleanup; | |
855 | } | |
856 | ||
857 | if (gfc_match_char (')') != MATCH_YES) | |
858 | { | |
859 | if (init) | |
860 | m = gfc_match_init_expr (&end); | |
861 | else | |
862 | m = gfc_match_expr (&end); | |
863 | ||
864 | if (m == MATCH_NO) | |
865 | goto syntax; | |
866 | if (m == MATCH_ERROR) | |
867 | goto cleanup; | |
868 | ||
869 | m = gfc_match_char (')'); | |
870 | if (m == MATCH_NO) | |
871 | goto syntax; | |
872 | } | |
873 | ||
874 | /* Optimize away the (:) reference. */ | |
38217d3e | 875 | if (start == NULL && end == NULL && !deferred) |
6de9cd9a DN |
876 | ref = NULL; |
877 | else | |
878 | { | |
879 | ref = gfc_get_ref (); | |
880 | ||
881 | ref->type = REF_SUBSTRING; | |
882 | if (start == NULL) | |
f622221a | 883 | start = gfc_get_int_expr (gfc_charlen_int_kind, NULL, 1); |
6de9cd9a DN |
884 | ref->u.ss.start = start; |
885 | if (end == NULL && cl) | |
886 | end = gfc_copy_expr (cl->length); | |
887 | ref->u.ss.end = end; | |
888 | ref->u.ss.length = cl; | |
889 | } | |
890 | ||
891 | *result = ref; | |
892 | return MATCH_YES; | |
893 | ||
894 | syntax: | |
895 | gfc_error ("Syntax error in SUBSTRING specification at %C"); | |
896 | m = MATCH_ERROR; | |
897 | ||
898 | cleanup: | |
899 | gfc_free_expr (start); | |
900 | gfc_free_expr (end); | |
901 | ||
63645982 | 902 | gfc_current_locus = old_loc; |
6de9cd9a DN |
903 | return m; |
904 | } | |
905 | ||
906 | ||
907 | /* Reads the next character of a string constant, taking care to | |
908 | return doubled delimiters on the input as a single instance of | |
909 | the delimiter. | |
910 | ||
8fc541d3 | 911 | Special return values for "ret" argument are: |
6de9cd9a DN |
912 | -1 End of the string, as determined by the delimiter |
913 | -2 Unterminated string detected | |
914 | ||
915 | Backslash codes are also expanded at this time. */ | |
916 | ||
8fc541d3 FXC |
917 | static gfc_char_t |
918 | next_string_char (gfc_char_t delimiter, int *ret) | |
6de9cd9a DN |
919 | { |
920 | locus old_locus; | |
8fc541d3 | 921 | gfc_char_t c; |
6de9cd9a | 922 | |
696abb30 | 923 | c = gfc_next_char_literal (INSTRING_WARN); |
8fc541d3 | 924 | *ret = 0; |
6de9cd9a DN |
925 | |
926 | if (c == '\n') | |
8fc541d3 FXC |
927 | { |
928 | *ret = -2; | |
929 | return 0; | |
930 | } | |
6de9cd9a | 931 | |
c61819ff | 932 | if (flag_backslash && c == '\\') |
6de9cd9a | 933 | { |
63645982 | 934 | old_locus = gfc_current_locus; |
6de9cd9a | 935 | |
a88a266c SK |
936 | if (gfc_match_special_char (&c) == MATCH_NO) |
937 | gfc_current_locus = old_locus; | |
2e6a83a7 SK |
938 | |
939 | if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings) | |
db30e21c | 940 | gfc_warning (0, "Extension: backslash character at %C"); |
6de9cd9a DN |
941 | } |
942 | ||
943 | if (c != delimiter) | |
944 | return c; | |
945 | ||
63645982 | 946 | old_locus = gfc_current_locus; |
696abb30 | 947 | c = gfc_next_char_literal (NONSTRING); |
6de9cd9a DN |
948 | |
949 | if (c == delimiter) | |
950 | return c; | |
63645982 | 951 | gfc_current_locus = old_locus; |
6de9cd9a | 952 | |
8fc541d3 FXC |
953 | *ret = -1; |
954 | return 0; | |
6de9cd9a DN |
955 | } |
956 | ||
957 | ||
958 | /* Special case of gfc_match_name() that matches a parameter kind name | |
959 | before a string constant. This takes case of the weird but legal | |
4f8ea09e | 960 | case of: |
6de9cd9a DN |
961 | |
962 | kind_____'string' | |
963 | ||
964 | where kind____ is a parameter. gfc_match_name() will happily slurp | |
965 | up all the underscores, which leads to problems. If we return | |
966 | MATCH_YES, the parse pointer points to the final underscore, which | |
967 | is not part of the name. We never return MATCH_ERROR-- errors in | |
968 | the name will be detected later. */ | |
969 | ||
970 | static match | |
971 | match_charkind_name (char *name) | |
972 | { | |
973 | locus old_loc; | |
974 | char c, peek; | |
975 | int len; | |
976 | ||
977 | gfc_gobble_whitespace (); | |
8fc541d3 | 978 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
979 | if (!ISALPHA (c)) |
980 | return MATCH_NO; | |
981 | ||
982 | *name++ = c; | |
983 | len = 1; | |
984 | ||
985 | for (;;) | |
986 | { | |
63645982 | 987 | old_loc = gfc_current_locus; |
8fc541d3 | 988 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
989 | |
990 | if (c == '_') | |
991 | { | |
8fc541d3 | 992 | peek = gfc_peek_ascii_char (); |
6de9cd9a DN |
993 | |
994 | if (peek == '\'' || peek == '\"') | |
995 | { | |
63645982 | 996 | gfc_current_locus = old_loc; |
6de9cd9a DN |
997 | *name = '\0'; |
998 | return MATCH_YES; | |
999 | } | |
1000 | } | |
1001 | ||
1002 | if (!ISALNUM (c) | |
1003 | && c != '_' | |
c61819ff | 1004 | && (c != '$' || !flag_dollar_ok)) |
6de9cd9a DN |
1005 | break; |
1006 | ||
1007 | *name++ = c; | |
1008 | if (++len > GFC_MAX_SYMBOL_LEN) | |
1009 | break; | |
1010 | } | |
1011 | ||
1012 | return MATCH_NO; | |
1013 | } | |
1014 | ||
1015 | ||
1016 | /* See if the current input matches a character constant. Lots of | |
1017 | contortions have to be done to match the kind parameter which comes | |
1018 | before the actual string. The main consideration is that we don't | |
1019 | want to error out too quickly. For example, we don't actually do | |
1020 | any validation of the kinds until we have actually seen a legal | |
1021 | delimiter. Using match_kind_param() generates errors too quickly. */ | |
1022 | ||
1023 | static match | |
edf1eac2 | 1024 | match_string_constant (gfc_expr **result) |
6de9cd9a | 1025 | { |
00660189 | 1026 | char name[GFC_MAX_SYMBOL_LEN + 1], peek; |
6b271a2e JB |
1027 | size_t length; |
1028 | int kind,save_warn_ampersand, ret; | |
6de9cd9a DN |
1029 | locus old_locus, start_locus; |
1030 | gfc_symbol *sym; | |
1031 | gfc_expr *e; | |
6de9cd9a | 1032 | match m; |
00660189 | 1033 | gfc_char_t c, delimiter, *p; |
6de9cd9a | 1034 | |
63645982 | 1035 | old_locus = gfc_current_locus; |
6de9cd9a DN |
1036 | |
1037 | gfc_gobble_whitespace (); | |
1038 | ||
6de9cd9a DN |
1039 | c = gfc_next_char (); |
1040 | if (c == '\'' || c == '"') | |
1041 | { | |
9d64df18 | 1042 | kind = gfc_default_character_kind; |
66faed76 | 1043 | start_locus = gfc_current_locus; |
6de9cd9a DN |
1044 | goto got_delim; |
1045 | } | |
1046 | ||
8fc541d3 | 1047 | if (gfc_wide_is_digit (c)) |
6de9cd9a DN |
1048 | { |
1049 | kind = 0; | |
1050 | ||
8fc541d3 | 1051 | while (gfc_wide_is_digit (c)) |
6de9cd9a DN |
1052 | { |
1053 | kind = kind * 10 + c - '0'; | |
1054 | if (kind > 9999999) | |
1055 | goto no_match; | |
1056 | c = gfc_next_char (); | |
1057 | } | |
1058 | ||
1059 | } | |
1060 | else | |
1061 | { | |
63645982 | 1062 | gfc_current_locus = old_locus; |
6de9cd9a DN |
1063 | |
1064 | m = match_charkind_name (name); | |
1065 | if (m != MATCH_YES) | |
1066 | goto no_match; | |
1067 | ||
1068 | if (gfc_find_symbol (name, NULL, 1, &sym) | |
1069 | || sym == NULL | |
1070 | || sym->attr.flavor != FL_PARAMETER) | |
1071 | goto no_match; | |
1072 | ||
1073 | kind = -1; | |
1074 | c = gfc_next_char (); | |
1075 | } | |
1076 | ||
1077 | if (c == ' ') | |
1078 | { | |
1079 | gfc_gobble_whitespace (); | |
1080 | c = gfc_next_char (); | |
1081 | } | |
1082 | ||
1083 | if (c != '_') | |
1084 | goto no_match; | |
1085 | ||
1086 | gfc_gobble_whitespace (); | |
6de9cd9a DN |
1087 | |
1088 | c = gfc_next_char (); | |
1089 | if (c != '\'' && c != '"') | |
1090 | goto no_match; | |
1091 | ||
66faed76 DF |
1092 | start_locus = gfc_current_locus; |
1093 | ||
6de9cd9a DN |
1094 | if (kind == -1) |
1095 | { | |
51f03c6b JJ |
1096 | if (gfc_extract_int (sym->value, &kind, 1)) |
1097 | return MATCH_ERROR; | |
a39fafac | 1098 | gfc_set_sym_referenced (sym); |
6de9cd9a DN |
1099 | } |
1100 | ||
e7a2d5fb | 1101 | if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
6de9cd9a DN |
1102 | { |
1103 | gfc_error ("Invalid kind %d for CHARACTER constant at %C", kind); | |
1104 | return MATCH_ERROR; | |
1105 | } | |
1106 | ||
1107 | got_delim: | |
1108 | /* Scan the string into a block of memory by first figuring out how | |
1109 | long it is, allocating the structure, then re-reading it. This | |
1110 | isn't particularly efficient, but string constants aren't that | |
1111 | common in most code. TODO: Use obstacks? */ | |
1112 | ||
1113 | delimiter = c; | |
1114 | length = 0; | |
1115 | ||
1116 | for (;;) | |
1117 | { | |
8fc541d3 FXC |
1118 | c = next_string_char (delimiter, &ret); |
1119 | if (ret == -1) | |
6de9cd9a | 1120 | break; |
8fc541d3 | 1121 | if (ret == -2) |
6de9cd9a | 1122 | { |
63645982 | 1123 | gfc_current_locus = start_locus; |
6de9cd9a DN |
1124 | gfc_error ("Unterminated character constant beginning at %C"); |
1125 | return MATCH_ERROR; | |
1126 | } | |
1127 | ||
1128 | length++; | |
1129 | } | |
1130 | ||
78019d16 SK |
1131 | /* Peek at the next character to see if it is a b, o, z, or x for the |
1132 | postfixed BOZ literal constants. */ | |
8fc541d3 FXC |
1133 | peek = gfc_peek_ascii_char (); |
1134 | if (peek == 'b' || peek == 'o' || peek =='z' || peek == 'x') | |
78019d16 SK |
1135 | goto no_match; |
1136 | ||
b7e75771 | 1137 | e = gfc_get_character_expr (kind, &start_locus, NULL, length); |
6de9cd9a | 1138 | |
63645982 | 1139 | gfc_current_locus = start_locus; |
6de9cd9a | 1140 | |
1355d8e7 TB |
1141 | /* We disable the warning for the following loop as the warning has already |
1142 | been printed in the loop above. */ | |
73e42eef | 1143 | save_warn_ampersand = warn_ampersand; |
48749dbc | 1144 | warn_ampersand = false; |
1355d8e7 | 1145 | |
b7e75771 | 1146 | p = e->value.character.string; |
6b271a2e | 1147 | for (size_t i = 0; i < length; i++) |
8fc541d3 FXC |
1148 | { |
1149 | c = next_string_char (delimiter, &ret); | |
1150 | ||
d393bbd7 | 1151 | if (!gfc_check_character_range (c, kind)) |
8fc541d3 | 1152 | { |
efb63364 | 1153 | gfc_free_expr (e); |
a4d9b221 | 1154 | gfc_error ("Character %qs in string at %C is not representable " |
d393bbd7 | 1155 | "in character kind %d", gfc_print_wide_char (c), kind); |
8fc541d3 FXC |
1156 | return MATCH_ERROR; |
1157 | } | |
1158 | ||
00660189 | 1159 | *p++ = c; |
8fc541d3 | 1160 | } |
6de9cd9a DN |
1161 | |
1162 | *p = '\0'; /* TODO: C-style string is for development/debug purposes. */ | |
73e42eef | 1163 | warn_ampersand = save_warn_ampersand; |
6de9cd9a | 1164 | |
8fc541d3 FXC |
1165 | next_string_char (delimiter, &ret); |
1166 | if (ret != -1) | |
6de9cd9a DN |
1167 | gfc_internal_error ("match_string_constant(): Delimiter not found"); |
1168 | ||
38217d3e | 1169 | if (match_substring (NULL, 0, &e->ref, false) != MATCH_NO) |
6de9cd9a DN |
1170 | e->expr_type = EXPR_SUBSTRING; |
1171 | ||
bdd1b1f5 HA |
1172 | /* Substrings with constant starting and ending points are eligible as |
1173 | designators (F2018, section 9.1). Simplify substrings to make them usable | |
1174 | e.g. in data statements. */ | |
1175 | if (e->expr_type == EXPR_SUBSTRING | |
1176 | && e->ref && e->ref->type == REF_SUBSTRING | |
1177 | && e->ref->u.ss.start->expr_type == EXPR_CONSTANT | |
1178 | && (e->ref->u.ss.end == NULL | |
1179 | || e->ref->u.ss.end->expr_type == EXPR_CONSTANT)) | |
1180 | { | |
1181 | gfc_expr *res; | |
1182 | ptrdiff_t istart, iend; | |
1183 | size_t length; | |
1184 | bool equal_length = false; | |
1185 | ||
1186 | /* Basic checks on substring starting and ending indices. */ | |
1187 | if (!gfc_resolve_substring (e->ref, &equal_length)) | |
1188 | return MATCH_ERROR; | |
1189 | ||
1190 | length = e->value.character.length; | |
1191 | istart = gfc_mpz_get_hwi (e->ref->u.ss.start->value.integer); | |
1192 | if (e->ref->u.ss.end == NULL) | |
1193 | iend = length; | |
1194 | else | |
1195 | iend = gfc_mpz_get_hwi (e->ref->u.ss.end->value.integer); | |
1196 | ||
1197 | if (istart <= iend) | |
1198 | { | |
1199 | if (istart < 1) | |
1200 | { | |
1201 | gfc_error ("Substring start index (%ld) at %L below 1", | |
1202 | (long) istart, &e->ref->u.ss.start->where); | |
1203 | return MATCH_ERROR; | |
1204 | } | |
1205 | if (iend > (ssize_t) length) | |
1206 | { | |
1207 | gfc_error ("Substring end index (%ld) at %L exceeds string " | |
1208 | "length", (long) iend, &e->ref->u.ss.end->where); | |
1209 | return MATCH_ERROR; | |
1210 | } | |
1211 | length = iend - istart + 1; | |
1212 | } | |
1213 | else | |
1214 | length = 0; | |
1215 | ||
1216 | res = gfc_get_constant_expr (BT_CHARACTER, e->ts.kind, &e->where); | |
1217 | res->value.character.string = gfc_get_wide_string (length + 1); | |
1218 | res->value.character.length = length; | |
1219 | if (length > 0) | |
1220 | memcpy (res->value.character.string, | |
1221 | &e->value.character.string[istart - 1], | |
1222 | length * sizeof (gfc_char_t)); | |
1223 | res->value.character.string[length] = '\0'; | |
1224 | e = res; | |
1225 | } | |
1226 | ||
6de9cd9a DN |
1227 | *result = e; |
1228 | ||
1229 | return MATCH_YES; | |
1230 | ||
1231 | no_match: | |
63645982 | 1232 | gfc_current_locus = old_locus; |
6de9cd9a DN |
1233 | return MATCH_NO; |
1234 | } | |
1235 | ||
1236 | ||
500f8f7b RS |
1237 | /* Match a .true. or .false. Returns 1 if a .true. was found, |
1238 | 0 if a .false. was found, and -1 otherwise. */ | |
1239 | static int | |
1240 | match_logical_constant_string (void) | |
1241 | { | |
1242 | locus orig_loc = gfc_current_locus; | |
1243 | ||
1244 | gfc_gobble_whitespace (); | |
8fc541d3 | 1245 | if (gfc_next_ascii_char () == '.') |
500f8f7b | 1246 | { |
8fc541d3 | 1247 | char ch = gfc_next_ascii_char (); |
500f8f7b RS |
1248 | if (ch == 'f') |
1249 | { | |
8fc541d3 FXC |
1250 | if (gfc_next_ascii_char () == 'a' |
1251 | && gfc_next_ascii_char () == 'l' | |
1252 | && gfc_next_ascii_char () == 's' | |
1253 | && gfc_next_ascii_char () == 'e' | |
1254 | && gfc_next_ascii_char () == '.') | |
500f8f7b RS |
1255 | /* Matched ".false.". */ |
1256 | return 0; | |
1257 | } | |
1258 | else if (ch == 't') | |
1259 | { | |
8fc541d3 FXC |
1260 | if (gfc_next_ascii_char () == 'r' |
1261 | && gfc_next_ascii_char () == 'u' | |
1262 | && gfc_next_ascii_char () == 'e' | |
1263 | && gfc_next_ascii_char () == '.') | |
500f8f7b RS |
1264 | /* Matched ".true.". */ |
1265 | return 1; | |
1266 | } | |
1267 | } | |
1268 | gfc_current_locus = orig_loc; | |
1269 | return -1; | |
1270 | } | |
1271 | ||
6de9cd9a DN |
1272 | /* Match a .true. or .false. */ |
1273 | ||
1274 | static match | |
edf1eac2 | 1275 | match_logical_constant (gfc_expr **result) |
6de9cd9a | 1276 | { |
6de9cd9a | 1277 | gfc_expr *e; |
bee64a2b | 1278 | int i, kind, is_iso_c; |
6de9cd9a | 1279 | |
500f8f7b | 1280 | i = match_logical_constant_string (); |
6de9cd9a DN |
1281 | if (i == -1) |
1282 | return MATCH_NO; | |
1283 | ||
bee64a2b | 1284 | kind = get_kind (&is_iso_c); |
6de9cd9a DN |
1285 | if (kind == -1) |
1286 | return MATCH_ERROR; | |
1287 | if (kind == -2) | |
9d64df18 | 1288 | kind = gfc_default_logical_kind; |
6de9cd9a | 1289 | |
e7a2d5fb | 1290 | if (gfc_validate_kind (BT_LOGICAL, kind, true) < 0) |
eb62be44 SK |
1291 | { |
1292 | gfc_error ("Bad kind for logical constant at %C"); | |
1293 | return MATCH_ERROR; | |
1294 | } | |
6de9cd9a | 1295 | |
b7e75771 | 1296 | e = gfc_get_logical_expr (kind, &gfc_current_locus, i); |
bee64a2b | 1297 | e->ts.is_c_interop = is_iso_c; |
6de9cd9a DN |
1298 | |
1299 | *result = e; | |
1300 | return MATCH_YES; | |
1301 | } | |
1302 | ||
1303 | ||
1304 | /* Match a real or imaginary part of a complex constant that is a | |
1305 | symbolic constant. */ | |
1306 | ||
1307 | static match | |
edf1eac2 | 1308 | match_sym_complex_part (gfc_expr **result) |
6de9cd9a DN |
1309 | { |
1310 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1311 | gfc_symbol *sym; | |
1312 | gfc_expr *e; | |
1313 | match m; | |
1314 | ||
1315 | m = gfc_match_name (name); | |
1316 | if (m != MATCH_YES) | |
1317 | return m; | |
1318 | ||
1319 | if (gfc_find_symbol (name, NULL, 1, &sym) || sym == NULL) | |
1320 | return MATCH_NO; | |
1321 | ||
1322 | if (sym->attr.flavor != FL_PARAMETER) | |
1323 | { | |
284ee475 | 1324 | /* Give the matcher for implied do-loops a chance to run. This yields |
a5fbc2f3 | 1325 | a much saner error message for "write(*,*) (i, i=1, 6" where the |
284ee475 SK |
1326 | right parenthesis is missing. */ |
1327 | char c; | |
1328 | gfc_gobble_whitespace (); | |
1329 | c = gfc_peek_ascii_char (); | |
1330 | if (c == '=' || c == ',') | |
1331 | { | |
1332 | m = MATCH_NO; | |
1333 | } | |
1334 | else | |
1335 | { | |
1336 | gfc_error ("Expected PARAMETER symbol in complex constant at %C"); | |
1337 | m = MATCH_ERROR; | |
1338 | } | |
1339 | return m; | |
6de9cd9a DN |
1340 | } |
1341 | ||
70db5f02 SK |
1342 | if (!sym->value) |
1343 | goto error; | |
1344 | ||
6de9cd9a DN |
1345 | if (!gfc_numeric_ts (&sym->value->ts)) |
1346 | { | |
1347 | gfc_error ("Numeric PARAMETER required in complex constant at %C"); | |
1348 | return MATCH_ERROR; | |
1349 | } | |
1350 | ||
1351 | if (sym->value->rank != 0) | |
1352 | { | |
1353 | gfc_error ("Scalar PARAMETER required in complex constant at %C"); | |
1354 | return MATCH_ERROR; | |
1355 | } | |
1356 | ||
524af0d6 JB |
1357 | if (!gfc_notify_std (GFC_STD_F2003, "PARAMETER symbol in " |
1358 | "complex constant at %C")) | |
e227ac57 FXC |
1359 | return MATCH_ERROR; |
1360 | ||
6de9cd9a DN |
1361 | switch (sym->value->ts.type) |
1362 | { | |
1363 | case BT_REAL: | |
1364 | e = gfc_copy_expr (sym->value); | |
1365 | break; | |
1366 | ||
1367 | case BT_COMPLEX: | |
1368 | e = gfc_complex2real (sym->value, sym->value->ts.kind); | |
1369 | if (e == NULL) | |
1370 | goto error; | |
1371 | break; | |
1372 | ||
1373 | case BT_INTEGER: | |
9d64df18 | 1374 | e = gfc_int2real (sym->value, gfc_default_real_kind); |
6de9cd9a DN |
1375 | if (e == NULL) |
1376 | goto error; | |
1377 | break; | |
1378 | ||
1379 | default: | |
1380 | gfc_internal_error ("gfc_match_sym_complex_part(): Bad type"); | |
1381 | } | |
1382 | ||
edf1eac2 | 1383 | *result = e; /* e is a scalar, real, constant expression. */ |
6de9cd9a DN |
1384 | return MATCH_YES; |
1385 | ||
1386 | error: | |
1387 | gfc_error ("Error converting PARAMETER constant in complex constant at %C"); | |
1388 | return MATCH_ERROR; | |
1389 | } | |
1390 | ||
1391 | ||
6de9cd9a DN |
1392 | /* Match a real or imaginary part of a complex number. */ |
1393 | ||
1394 | static match | |
edf1eac2 | 1395 | match_complex_part (gfc_expr **result) |
6de9cd9a DN |
1396 | { |
1397 | match m; | |
1398 | ||
1399 | m = match_sym_complex_part (result); | |
1400 | if (m != MATCH_NO) | |
1401 | return m; | |
1402 | ||
69029c61 PB |
1403 | m = match_real_constant (result, 1); |
1404 | if (m != MATCH_NO) | |
1405 | return m; | |
1406 | ||
1407 | return match_integer_constant (result, 1); | |
6de9cd9a DN |
1408 | } |
1409 | ||
1410 | ||
1411 | /* Try to match a complex constant. */ | |
1412 | ||
1413 | static match | |
edf1eac2 | 1414 | match_complex_constant (gfc_expr **result) |
6de9cd9a DN |
1415 | { |
1416 | gfc_expr *e, *real, *imag; | |
fea70c99 | 1417 | gfc_error_buffer old_error; |
6de9cd9a DN |
1418 | gfc_typespec target; |
1419 | locus old_loc; | |
1420 | int kind; | |
1421 | match m; | |
1422 | ||
63645982 | 1423 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1424 | real = imag = e = NULL; |
1425 | ||
1426 | m = gfc_match_char ('('); | |
1427 | if (m != MATCH_YES) | |
1428 | return m; | |
1429 | ||
fea70c99 | 1430 | gfc_push_error (&old_error); |
6de9cd9a DN |
1431 | |
1432 | m = match_complex_part (&real); | |
1433 | if (m == MATCH_NO) | |
d71b89ca | 1434 | { |
fea70c99 | 1435 | gfc_free_error (&old_error); |
d71b89ca JJ |
1436 | goto cleanup; |
1437 | } | |
6de9cd9a DN |
1438 | |
1439 | if (gfc_match_char (',') == MATCH_NO) | |
1440 | { | |
396e56d2 TK |
1441 | /* It is possible that gfc_int2real issued a warning when |
1442 | converting an integer to real. Throw this away here. */ | |
1443 | ||
1444 | gfc_clear_warning (); | |
fea70c99 | 1445 | gfc_pop_error (&old_error); |
6de9cd9a DN |
1446 | m = MATCH_NO; |
1447 | goto cleanup; | |
1448 | } | |
1449 | ||
1450 | /* If m is error, then something was wrong with the real part and we | |
1451 | assume we have a complex constant because we've seen the ','. An | |
1452 | ambiguous case here is the start of an iterator list of some | |
1453 | sort. These sort of lists are matched prior to coming here. */ | |
1454 | ||
1455 | if (m == MATCH_ERROR) | |
d71b89ca | 1456 | { |
fea70c99 | 1457 | gfc_free_error (&old_error); |
d71b89ca JJ |
1458 | goto cleanup; |
1459 | } | |
fea70c99 | 1460 | gfc_pop_error (&old_error); |
6de9cd9a DN |
1461 | |
1462 | m = match_complex_part (&imag); | |
1463 | if (m == MATCH_NO) | |
1464 | goto syntax; | |
1465 | if (m == MATCH_ERROR) | |
1466 | goto cleanup; | |
1467 | ||
1468 | m = gfc_match_char (')'); | |
1469 | if (m == MATCH_NO) | |
87ebdf2f SK |
1470 | { |
1471 | /* Give the matcher for implied do-loops a chance to run. This | |
1472 | yields a much saner error message for (/ (i, 4=i, 6) /). */ | |
8fc541d3 | 1473 | if (gfc_peek_ascii_char () == '=') |
87ebdf2f SK |
1474 | { |
1475 | m = MATCH_ERROR; | |
1476 | goto cleanup; | |
1477 | } | |
1478 | else | |
6de9cd9a | 1479 | goto syntax; |
87ebdf2f | 1480 | } |
6de9cd9a DN |
1481 | |
1482 | if (m == MATCH_ERROR) | |
1483 | goto cleanup; | |
1484 | ||
1485 | /* Decide on the kind of this complex number. */ | |
69029c61 PB |
1486 | if (real->ts.type == BT_REAL) |
1487 | { | |
1488 | if (imag->ts.type == BT_REAL) | |
1489 | kind = gfc_kind_max (real, imag); | |
1490 | else | |
1491 | kind = real->ts.kind; | |
1492 | } | |
1493 | else | |
1494 | { | |
1495 | if (imag->ts.type == BT_REAL) | |
1496 | kind = imag->ts.kind; | |
1497 | else | |
1498 | kind = gfc_default_real_kind; | |
1499 | } | |
d91909c0 | 1500 | gfc_clear_ts (&target); |
6de9cd9a DN |
1501 | target.type = BT_REAL; |
1502 | target.kind = kind; | |
1503 | ||
69029c61 | 1504 | if (real->ts.type != BT_REAL || kind != real->ts.kind) |
6de9cd9a | 1505 | gfc_convert_type (real, &target, 2); |
69029c61 | 1506 | if (imag->ts.type != BT_REAL || kind != imag->ts.kind) |
6de9cd9a DN |
1507 | gfc_convert_type (imag, &target, 2); |
1508 | ||
8dc63166 | 1509 | e = convert_complex (real, imag, kind); |
63645982 | 1510 | e->where = gfc_current_locus; |
6de9cd9a DN |
1511 | |
1512 | gfc_free_expr (real); | |
1513 | gfc_free_expr (imag); | |
1514 | ||
1515 | *result = e; | |
1516 | return MATCH_YES; | |
1517 | ||
1518 | syntax: | |
1519 | gfc_error ("Syntax error in COMPLEX constant at %C"); | |
1520 | m = MATCH_ERROR; | |
1521 | ||
1522 | cleanup: | |
1523 | gfc_free_expr (e); | |
1524 | gfc_free_expr (real); | |
1525 | gfc_free_expr (imag); | |
63645982 | 1526 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1527 | |
1528 | return m; | |
1529 | } | |
1530 | ||
1531 | ||
1532 | /* Match constants in any of several forms. Returns nonzero for a | |
1533 | match, zero for no match. */ | |
1534 | ||
1535 | match | |
edf1eac2 | 1536 | gfc_match_literal_constant (gfc_expr **result, int signflag) |
6de9cd9a DN |
1537 | { |
1538 | match m; | |
1539 | ||
1540 | m = match_complex_constant (result); | |
1541 | if (m != MATCH_NO) | |
1542 | return m; | |
1543 | ||
1544 | m = match_string_constant (result); | |
1545 | if (m != MATCH_NO) | |
1546 | return m; | |
1547 | ||
1548 | m = match_boz_constant (result); | |
1549 | if (m != MATCH_NO) | |
1550 | return m; | |
1551 | ||
1552 | m = match_real_constant (result, signflag); | |
1553 | if (m != MATCH_NO) | |
1554 | return m; | |
1555 | ||
d3642f89 FW |
1556 | m = match_hollerith_constant (result); |
1557 | if (m != MATCH_NO) | |
1558 | return m; | |
1559 | ||
6de9cd9a DN |
1560 | m = match_integer_constant (result, signflag); |
1561 | if (m != MATCH_NO) | |
1562 | return m; | |
1563 | ||
1564 | m = match_logical_constant (result); | |
1565 | if (m != MATCH_NO) | |
1566 | return m; | |
1567 | ||
1568 | return MATCH_NO; | |
1569 | } | |
1570 | ||
1571 | ||
2d71b918 JW |
1572 | /* This checks if a symbol is the return value of an encompassing function. |
1573 | Function nesting can be maximally two levels deep, but we may have | |
1574 | additional local namespaces like BLOCK etc. */ | |
1575 | ||
1576 | bool | |
1577 | gfc_is_function_return_value (gfc_symbol *sym, gfc_namespace *ns) | |
1578 | { | |
1579 | if (!sym->attr.function || (sym->result != sym)) | |
1580 | return false; | |
1581 | while (ns) | |
1582 | { | |
1583 | if (ns->proc_name == sym) | |
1584 | return true; | |
1585 | ns = ns->parent; | |
1586 | } | |
1587 | return false; | |
1588 | } | |
1589 | ||
1590 | ||
6de9cd9a DN |
1591 | /* Match a single actual argument value. An actual argument is |
1592 | usually an expression, but can also be a procedure name. If the | |
1593 | argument is a single name, it is not always possible to tell | |
1594 | whether the name is a dummy procedure or not. We treat these cases | |
1595 | by creating an argument that looks like a dummy procedure and | |
1596 | fixing things later during resolution. */ | |
1597 | ||
1598 | static match | |
edf1eac2 | 1599 | match_actual_arg (gfc_expr **result) |
6de9cd9a DN |
1600 | { |
1601 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1602 | gfc_symtree *symtree; | |
1603 | locus where, w; | |
1604 | gfc_expr *e; | |
8fc541d3 | 1605 | char c; |
6de9cd9a | 1606 | |
618f4f46 | 1607 | gfc_gobble_whitespace (); |
63645982 | 1608 | where = gfc_current_locus; |
6de9cd9a DN |
1609 | |
1610 | switch (gfc_match_name (name)) | |
1611 | { | |
1612 | case MATCH_ERROR: | |
1613 | return MATCH_ERROR; | |
1614 | ||
1615 | case MATCH_NO: | |
1616 | break; | |
1617 | ||
1618 | case MATCH_YES: | |
63645982 | 1619 | w = gfc_current_locus; |
6de9cd9a | 1620 | gfc_gobble_whitespace (); |
8fc541d3 | 1621 | c = gfc_next_ascii_char (); |
63645982 | 1622 | gfc_current_locus = w; |
6de9cd9a DN |
1623 | |
1624 | if (c != ',' && c != ')') | |
1625 | break; | |
1626 | ||
1627 | if (gfc_find_sym_tree (name, NULL, 1, &symtree)) | |
1628 | break; | |
1629 | /* Handle error elsewhere. */ | |
1630 | ||
1631 | /* Eliminate a couple of common cases where we know we don't | |
edf1eac2 | 1632 | have a function argument. */ |
6de9cd9a | 1633 | if (symtree == NULL) |
edf1eac2 | 1634 | { |
08a6b8e0 | 1635 | gfc_get_sym_tree (name, NULL, &symtree, false); |
edf1eac2 SK |
1636 | gfc_set_sym_referenced (symtree->n.sym); |
1637 | } | |
6de9cd9a DN |
1638 | else |
1639 | { | |
edf1eac2 | 1640 | gfc_symbol *sym; |
6de9cd9a | 1641 | |
edf1eac2 SK |
1642 | sym = symtree->n.sym; |
1643 | gfc_set_sym_referenced (sym); | |
c0f0e35a JD |
1644 | if (sym->attr.flavor == FL_NAMELIST) |
1645 | { | |
67914693 | 1646 | gfc_error ("Namelist %qs cannot be an argument at %L", |
c0f0e35a JD |
1647 | sym->name, &where); |
1648 | break; | |
1649 | } | |
6de9cd9a DN |
1650 | if (sym->attr.flavor != FL_PROCEDURE |
1651 | && sym->attr.flavor != FL_UNKNOWN) | |
1652 | break; | |
1653 | ||
6f9c9d6d TB |
1654 | if (sym->attr.in_common && !sym->attr.proc_pointer) |
1655 | { | |
bf1b77dd | 1656 | if (!gfc_add_flavor (&sym->attr, FL_VARIABLE, |
524af0d6 | 1657 | sym->name, &sym->declared_at)) |
efb63364 | 1658 | return MATCH_ERROR; |
6f9c9d6d TB |
1659 | break; |
1660 | } | |
1661 | ||
6de9cd9a DN |
1662 | /* If the symbol is a function with itself as the result and |
1663 | is being defined, then we have a variable. */ | |
7a4ef45b JJ |
1664 | if (sym->attr.function && sym->result == sym) |
1665 | { | |
2d71b918 | 1666 | if (gfc_is_function_return_value (sym, gfc_current_ns)) |
7a4ef45b JJ |
1667 | break; |
1668 | ||
1669 | if (sym->attr.entry | |
1670 | && (sym->ns == gfc_current_ns | |
1671 | || sym->ns == gfc_current_ns->parent)) | |
1672 | { | |
1673 | gfc_entry_list *el = NULL; | |
1674 | ||
1675 | for (el = sym->ns->entries; el; el = el->next) | |
1676 | if (sym == el->sym) | |
1677 | break; | |
1678 | ||
1679 | if (el) | |
1680 | break; | |
1681 | } | |
1682 | } | |
6de9cd9a DN |
1683 | } |
1684 | ||
1685 | e = gfc_get_expr (); /* Leave it unknown for now */ | |
1686 | e->symtree = symtree; | |
1687 | e->expr_type = EXPR_VARIABLE; | |
1688 | e->ts.type = BT_PROCEDURE; | |
1689 | e->where = where; | |
1690 | ||
1691 | *result = e; | |
1692 | return MATCH_YES; | |
1693 | } | |
1694 | ||
63645982 | 1695 | gfc_current_locus = where; |
6de9cd9a DN |
1696 | return gfc_match_expr (result); |
1697 | } | |
1698 | ||
1699 | ||
5bab4c96 | 1700 | /* Match a keyword argument or type parameter spec list.. */ |
6de9cd9a DN |
1701 | |
1702 | static match | |
5bab4c96 | 1703 | match_keyword_arg (gfc_actual_arglist *actual, gfc_actual_arglist *base, bool pdt) |
6de9cd9a DN |
1704 | { |
1705 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1706 | gfc_actual_arglist *a; | |
1707 | locus name_locus; | |
1708 | match m; | |
1709 | ||
63645982 | 1710 | name_locus = gfc_current_locus; |
6de9cd9a DN |
1711 | m = gfc_match_name (name); |
1712 | ||
1713 | if (m != MATCH_YES) | |
1714 | goto cleanup; | |
1715 | if (gfc_match_char ('=') != MATCH_YES) | |
1716 | { | |
1717 | m = MATCH_NO; | |
1718 | goto cleanup; | |
1719 | } | |
1720 | ||
5bab4c96 PT |
1721 | if (pdt) |
1722 | { | |
1723 | if (gfc_match_char ('*') == MATCH_YES) | |
1724 | { | |
1725 | actual->spec_type = SPEC_ASSUMED; | |
1726 | goto add_name; | |
1727 | } | |
1728 | else if (gfc_match_char (':') == MATCH_YES) | |
1729 | { | |
1730 | actual->spec_type = SPEC_DEFERRED; | |
1731 | goto add_name; | |
1732 | } | |
1733 | else | |
1734 | actual->spec_type = SPEC_EXPLICIT; | |
1735 | } | |
1736 | ||
6de9cd9a DN |
1737 | m = match_actual_arg (&actual->expr); |
1738 | if (m != MATCH_YES) | |
1739 | goto cleanup; | |
1740 | ||
1741 | /* Make sure this name has not appeared yet. */ | |
5bab4c96 | 1742 | add_name: |
6de9cd9a DN |
1743 | if (name[0] != '\0') |
1744 | { | |
1745 | for (a = base; a; a = a->next) | |
cb9e4f55 | 1746 | if (a->name != NULL && strcmp (a->name, name) == 0) |
6de9cd9a | 1747 | { |
a4d9b221 | 1748 | gfc_error ("Keyword %qs at %C has already appeared in the " |
edf1eac2 | 1749 | "current argument list", name); |
6de9cd9a DN |
1750 | return MATCH_ERROR; |
1751 | } | |
1752 | } | |
1753 | ||
51f03c6b | 1754 | actual->name = gfc_get_string ("%s", name); |
6de9cd9a DN |
1755 | return MATCH_YES; |
1756 | ||
1757 | cleanup: | |
63645982 | 1758 | gfc_current_locus = name_locus; |
6de9cd9a DN |
1759 | return m; |
1760 | } | |
1761 | ||
1762 | ||
7fcafa71 PT |
1763 | /* Match an argument list function, such as %VAL. */ |
1764 | ||
1765 | static match | |
1766 | match_arg_list_function (gfc_actual_arglist *result) | |
1767 | { | |
1768 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1769 | locus old_locus; | |
1770 | match m; | |
1771 | ||
1772 | old_locus = gfc_current_locus; | |
1773 | ||
1774 | if (gfc_match_char ('%') != MATCH_YES) | |
1775 | { | |
1776 | m = MATCH_NO; | |
1777 | goto cleanup; | |
1778 | } | |
1779 | ||
1780 | m = gfc_match ("%n (", name); | |
1781 | if (m != MATCH_YES) | |
1782 | goto cleanup; | |
1783 | ||
1784 | if (name[0] != '\0') | |
1785 | { | |
1786 | switch (name[0]) | |
1787 | { | |
1788 | case 'l': | |
2eb3745a | 1789 | if (gfc_str_startswith (name, "loc")) |
7fcafa71 PT |
1790 | { |
1791 | result->name = "%LOC"; | |
1792 | break; | |
1793 | } | |
191816a3 | 1794 | /* FALLTHRU */ |
7fcafa71 | 1795 | case 'r': |
2eb3745a | 1796 | if (gfc_str_startswith (name, "ref")) |
7fcafa71 PT |
1797 | { |
1798 | result->name = "%REF"; | |
1799 | break; | |
1800 | } | |
191816a3 | 1801 | /* FALLTHRU */ |
7fcafa71 | 1802 | case 'v': |
2eb3745a | 1803 | if (gfc_str_startswith (name, "val")) |
7fcafa71 PT |
1804 | { |
1805 | result->name = "%VAL"; | |
1806 | break; | |
1807 | } | |
191816a3 | 1808 | /* FALLTHRU */ |
7fcafa71 PT |
1809 | default: |
1810 | m = MATCH_ERROR; | |
1811 | goto cleanup; | |
1812 | } | |
1813 | } | |
1814 | ||
524af0d6 | 1815 | if (!gfc_notify_std (GFC_STD_GNU, "argument list function at %C")) |
7fcafa71 PT |
1816 | { |
1817 | m = MATCH_ERROR; | |
1818 | goto cleanup; | |
1819 | } | |
1820 | ||
1821 | m = match_actual_arg (&result->expr); | |
1822 | if (m != MATCH_YES) | |
1823 | goto cleanup; | |
1824 | ||
1825 | if (gfc_match_char (')') != MATCH_YES) | |
1826 | { | |
1827 | m = MATCH_NO; | |
1828 | goto cleanup; | |
1829 | } | |
1830 | ||
1831 | return MATCH_YES; | |
1832 | ||
1833 | cleanup: | |
1834 | gfc_current_locus = old_locus; | |
1835 | return m; | |
1836 | } | |
1837 | ||
1838 | ||
6de9cd9a DN |
1839 | /* Matches an actual argument list of a function or subroutine, from |
1840 | the opening parenthesis to the closing parenthesis. The argument | |
1841 | list is assumed to allow keyword arguments because we don't know if | |
1842 | the symbol associated with the procedure has an implicit interface | |
ed5ee445 | 1843 | or not. We make sure keywords are unique. If sub_flag is set, |
5bab4c96 PT |
1844 | we're matching the argument list of a subroutine. |
1845 | ||
1846 | NOTE: An alternative use for this function is to match type parameter | |
1847 | spec lists, which are so similar to actual argument lists that the | |
1848 | machinery can be reused. This use is flagged by the optional argument | |
1849 | 'pdt'. */ | |
6de9cd9a DN |
1850 | |
1851 | match | |
5bab4c96 | 1852 | gfc_match_actual_arglist (int sub_flag, gfc_actual_arglist **argp, bool pdt) |
6de9cd9a DN |
1853 | { |
1854 | gfc_actual_arglist *head, *tail; | |
1855 | int seen_keyword; | |
1856 | gfc_st_label *label; | |
1857 | locus old_loc; | |
1858 | match m; | |
1859 | ||
1860 | *argp = tail = NULL; | |
63645982 | 1861 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1862 | |
1863 | seen_keyword = 0; | |
1864 | ||
1865 | if (gfc_match_char ('(') == MATCH_NO) | |
1866 | return (sub_flag) ? MATCH_YES : MATCH_NO; | |
1867 | ||
1868 | if (gfc_match_char (')') == MATCH_YES) | |
1869 | return MATCH_YES; | |
5bab4c96 | 1870 | |
6de9cd9a DN |
1871 | head = NULL; |
1872 | ||
837c4b78 JW |
1873 | matching_actual_arglist++; |
1874 | ||
6de9cd9a DN |
1875 | for (;;) |
1876 | { | |
1877 | if (head == NULL) | |
1878 | head = tail = gfc_get_actual_arglist (); | |
1879 | else | |
1880 | { | |
1881 | tail->next = gfc_get_actual_arglist (); | |
1882 | tail = tail->next; | |
1883 | } | |
1884 | ||
5bab4c96 | 1885 | if (sub_flag && !pdt && gfc_match_char ('*') == MATCH_YES) |
6de9cd9a | 1886 | { |
a34a91f0 | 1887 | m = gfc_match_st_label (&label); |
6de9cd9a DN |
1888 | if (m == MATCH_NO) |
1889 | gfc_error ("Expected alternate return label at %C"); | |
1890 | if (m != MATCH_YES) | |
1891 | goto cleanup; | |
1892 | ||
524af0d6 JB |
1893 | if (!gfc_notify_std (GFC_STD_F95_OBS, "Alternate-return argument " |
1894 | "at %C")) | |
fbdeeaac JW |
1895 | goto cleanup; |
1896 | ||
6de9cd9a DN |
1897 | tail->label = label; |
1898 | goto next; | |
1899 | } | |
1900 | ||
5bab4c96 PT |
1901 | if (pdt && !seen_keyword) |
1902 | { | |
1903 | if (gfc_match_char (':') == MATCH_YES) | |
1904 | { | |
1905 | tail->spec_type = SPEC_DEFERRED; | |
1906 | goto next; | |
1907 | } | |
1908 | else if (gfc_match_char ('*') == MATCH_YES) | |
1909 | { | |
1910 | tail->spec_type = SPEC_ASSUMED; | |
1911 | goto next; | |
1912 | } | |
1913 | else | |
1914 | tail->spec_type = SPEC_EXPLICIT; | |
18a4e7e3 PT |
1915 | |
1916 | m = match_keyword_arg (tail, head, pdt); | |
1917 | if (m == MATCH_YES) | |
1918 | { | |
1919 | seen_keyword = 1; | |
1920 | goto next; | |
1921 | } | |
1922 | if (m == MATCH_ERROR) | |
1923 | goto cleanup; | |
5bab4c96 PT |
1924 | } |
1925 | ||
6de9cd9a | 1926 | /* After the first keyword argument is seen, the following |
edf1eac2 | 1927 | arguments must also have keywords. */ |
6de9cd9a DN |
1928 | if (seen_keyword) |
1929 | { | |
5bab4c96 | 1930 | m = match_keyword_arg (tail, head, pdt); |
6de9cd9a DN |
1931 | |
1932 | if (m == MATCH_ERROR) | |
1933 | goto cleanup; | |
1934 | if (m == MATCH_NO) | |
1935 | { | |
edf1eac2 | 1936 | gfc_error ("Missing keyword name in actual argument list at %C"); |
6de9cd9a DN |
1937 | goto cleanup; |
1938 | } | |
1939 | ||
1940 | } | |
1941 | else | |
1942 | { | |
7fcafa71 PT |
1943 | /* Try an argument list function, like %VAL. */ |
1944 | m = match_arg_list_function (tail); | |
6de9cd9a DN |
1945 | if (m == MATCH_ERROR) |
1946 | goto cleanup; | |
1947 | ||
7fcafa71 PT |
1948 | /* See if we have the first keyword argument. */ |
1949 | if (m == MATCH_NO) | |
1950 | { | |
5bab4c96 | 1951 | m = match_keyword_arg (tail, head, false); |
7fcafa71 PT |
1952 | if (m == MATCH_YES) |
1953 | seen_keyword = 1; | |
1954 | if (m == MATCH_ERROR) | |
1955 | goto cleanup; | |
1956 | } | |
1957 | ||
6de9cd9a DN |
1958 | if (m == MATCH_NO) |
1959 | { | |
1960 | /* Try for a non-keyword argument. */ | |
1961 | m = match_actual_arg (&tail->expr); | |
1962 | if (m == MATCH_ERROR) | |
1963 | goto cleanup; | |
1964 | if (m == MATCH_NO) | |
1965 | goto syntax; | |
1966 | } | |
1967 | } | |
1968 | ||
7fcafa71 | 1969 | |
6de9cd9a DN |
1970 | next: |
1971 | if (gfc_match_char (')') == MATCH_YES) | |
1972 | break; | |
1973 | if (gfc_match_char (',') != MATCH_YES) | |
1974 | goto syntax; | |
1975 | } | |
1976 | ||
1977 | *argp = head; | |
837c4b78 | 1978 | matching_actual_arglist--; |
6de9cd9a DN |
1979 | return MATCH_YES; |
1980 | ||
1981 | syntax: | |
1982 | gfc_error ("Syntax error in argument list at %C"); | |
1983 | ||
1984 | cleanup: | |
1985 | gfc_free_actual_arglist (head); | |
63645982 | 1986 | gfc_current_locus = old_loc; |
837c4b78 | 1987 | matching_actual_arglist--; |
6de9cd9a DN |
1988 | return MATCH_ERROR; |
1989 | } | |
1990 | ||
1991 | ||
8e1f752a | 1992 | /* Used by gfc_match_varspec() to extend the reference list by one |
6de9cd9a DN |
1993 | element. */ |
1994 | ||
1995 | static gfc_ref * | |
edf1eac2 | 1996 | extend_ref (gfc_expr *primary, gfc_ref *tail) |
6de9cd9a | 1997 | { |
6de9cd9a DN |
1998 | if (primary->ref == NULL) |
1999 | primary->ref = tail = gfc_get_ref (); | |
2000 | else | |
2001 | { | |
2002 | if (tail == NULL) | |
2003 | gfc_internal_error ("extend_ref(): Bad tail"); | |
2004 | tail->next = gfc_get_ref (); | |
2005 | tail = tail->next; | |
2006 | } | |
2007 | ||
2008 | return tail; | |
2009 | } | |
2010 | ||
2011 | ||
a5fbc2f3 PT |
2012 | /* Used by gfc_match_varspec() to match an inquiry reference. */ |
2013 | ||
2014 | static bool | |
2015 | is_inquiry_ref (const char *name, gfc_ref **ref) | |
2016 | { | |
2017 | inquiry_type type; | |
2018 | ||
2019 | if (name == NULL) | |
2020 | return false; | |
2021 | ||
2022 | if (ref) *ref = NULL; | |
2023 | ||
2024 | if (strcmp (name, "re") == 0) | |
2025 | type = INQUIRY_RE; | |
2026 | else if (strcmp (name, "im") == 0) | |
2027 | type = INQUIRY_IM; | |
2028 | else if (strcmp (name, "kind") == 0) | |
2029 | type = INQUIRY_KIND; | |
2030 | else if (strcmp (name, "len") == 0) | |
2031 | type = INQUIRY_LEN; | |
2032 | else | |
2033 | return false; | |
2034 | ||
2035 | if (ref) | |
2036 | { | |
2037 | *ref = gfc_get_ref (); | |
2038 | (*ref)->type = REF_INQUIRY; | |
2039 | (*ref)->u.i = type; | |
2040 | } | |
2041 | ||
2042 | return true; | |
2043 | } | |
2044 | ||
2045 | ||
6de9cd9a DN |
2046 | /* Match any additional specifications associated with the current |
2047 | variable like member references or substrings. If equiv_flag is | |
2048 | set we only match stuff that is allowed inside an EQUIVALENCE | |
8e1f752a | 2049 | statement. sub_flag tells whether we expect a type-bound procedure found |
713485cc JW |
2050 | to be a subroutine as part of CALL or a FUNCTION. For procedure pointer |
2051 | components, 'ppc_arg' determines whether the PPC may be called (with an | |
2052 | argument list), or whether it may just be referred to as a pointer. */ | |
6de9cd9a | 2053 | |
8e1f752a | 2054 | match |
713485cc JW |
2055 | gfc_match_varspec (gfc_expr *primary, int equiv_flag, bool sub_flag, |
2056 | bool ppc_arg) | |
6de9cd9a DN |
2057 | { |
2058 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
f6288c24 | 2059 | gfc_ref *substring, *tail, *tmp; |
e41da823 PT |
2060 | gfc_component *component = NULL; |
2061 | gfc_component *previous = NULL; | |
a8006d09 | 2062 | gfc_symbol *sym = primary->symtree->n.sym; |
b89a63b9 | 2063 | gfc_expr *tgt_expr = NULL; |
6de9cd9a | 2064 | match m; |
f2d3cb25 | 2065 | bool unknown; |
a5fbc2f3 | 2066 | bool inquiry; |
f79be3a7 | 2067 | bool intrinsic; |
a5fbc2f3 | 2068 | locus old_loc; |
f6288c24 | 2069 | char sep; |
6de9cd9a DN |
2070 | |
2071 | tail = NULL; | |
2072 | ||
3c721513 | 2073 | gfc_gobble_whitespace (); |
d3a9eea2 TB |
2074 | |
2075 | if (gfc_peek_ascii_char () == '[') | |
2076 | { | |
c49ea23d PT |
2077 | if ((sym->ts.type != BT_CLASS && sym->attr.dimension) |
2078 | || (sym->ts.type == BT_CLASS && CLASS_DATA (sym) | |
2079 | && CLASS_DATA (sym)->attr.dimension)) | |
d3a9eea2 TB |
2080 | { |
2081 | gfc_error ("Array section designator, e.g. '(:)', is required " | |
2082 | "besides the coarray designator '[...]' at %C"); | |
2083 | return MATCH_ERROR; | |
2084 | } | |
c49ea23d PT |
2085 | if ((sym->ts.type != BT_CLASS && !sym->attr.codimension) |
2086 | || (sym->ts.type == BT_CLASS && CLASS_DATA (sym) | |
2087 | && !CLASS_DATA (sym)->attr.codimension)) | |
d3a9eea2 | 2088 | { |
a4d9b221 | 2089 | gfc_error ("Coarray designator at %C but %qs is not a coarray", |
d3a9eea2 TB |
2090 | sym->name); |
2091 | return MATCH_ERROR; | |
2092 | } | |
2093 | } | |
2094 | ||
b89a63b9 PT |
2095 | if (sym->assoc && sym->assoc->target) |
2096 | tgt_expr = sym->assoc->target; | |
2097 | ||
52bf62f9 | 2098 | /* For associate names, we may not yet know whether they are arrays or not. |
b125dc1e PT |
2099 | If the selector expression is unambiguously an array; eg. a full array |
2100 | or an array section, then the associate name must be an array and we can | |
2101 | fix it now. Otherwise, if parentheses follow and it is not a character | |
2102 | type, we have to assume that it actually is one for now. The final | |
2103 | decision will be made at resolution, of course. */ | |
2104 | if (sym->assoc | |
2105 | && gfc_peek_ascii_char () == '(' | |
2106 | && sym->ts.type != BT_CLASS | |
2107 | && !sym->attr.dimension) | |
2108 | { | |
b89a63b9 PT |
2109 | gfc_ref *ref = NULL; |
2110 | ||
2111 | if (!sym->assoc->dangling && tgt_expr) | |
2112 | { | |
2113 | if (tgt_expr->expr_type == EXPR_VARIABLE) | |
2114 | gfc_resolve_expr (tgt_expr); | |
2115 | ||
2116 | ref = tgt_expr->ref; | |
2117 | for (; ref; ref = ref->next) | |
2118 | if (ref->type == REF_ARRAY | |
2119 | && (ref->u.ar.type == AR_FULL | |
2120 | || ref->u.ar.type == AR_SECTION)) | |
2121 | break; | |
2122 | } | |
2123 | ||
2124 | if (ref || (!(sym->assoc->dangling || sym->ts.type == BT_CHARACTER) | |
2125 | && sym->assoc->st | |
2126 | && sym->assoc->st->n.sym | |
2127 | && sym->assoc->st->n.sym->attr.dimension == 0)) | |
b125dc1e | 2128 | { |
b89a63b9 PT |
2129 | sym->attr.dimension = 1; |
2130 | if (sym->as == NULL | |
b125dc1e PT |
2131 | && sym->assoc->st |
2132 | && sym->assoc->st->n.sym | |
2133 | && sym->assoc->st->n.sym->as) | |
2134 | sym->as = gfc_copy_array_spec (sym->assoc->st->n.sym->as); | |
2135 | } | |
2136 | } | |
b89a63b9 PT |
2137 | else if (sym->ts.type == BT_CLASS |
2138 | && tgt_expr | |
2139 | && tgt_expr->expr_type == EXPR_VARIABLE | |
2140 | && sym->ts.u.derived != tgt_expr->ts.u.derived) | |
2141 | { | |
2142 | gfc_resolve_expr (tgt_expr); | |
2143 | if (tgt_expr->rank) | |
2144 | sym->ts.u.derived = tgt_expr->ts.u.derived; | |
2145 | } | |
52bf62f9 | 2146 | |
c74b74a8 | 2147 | if ((equiv_flag && gfc_peek_ascii_char () == '(') |
d3a9eea2 | 2148 | || gfc_peek_ascii_char () == '[' || sym->attr.codimension |
ce2ab24c | 2149 | || (sym->attr.dimension && sym->ts.type != BT_CLASS |
2a573572 | 2150 | && !sym->attr.proc_pointer && !gfc_is_proc_ptr_comp (primary) |
f64edc8b | 2151 | && !(gfc_matching_procptr_assignment |
cf2b3c22 | 2152 | && sym->attr.flavor == FL_PROCEDURE)) |
22061030 | 2153 | || (sym->ts.type == BT_CLASS && sym->attr.class_ok |
492792ed TB |
2154 | && (CLASS_DATA (sym)->attr.dimension |
2155 | || CLASS_DATA (sym)->attr.codimension))) | |
6de9cd9a | 2156 | { |
102344e2 TB |
2157 | gfc_array_spec *as; |
2158 | ||
2159 | tail = extend_ref (primary, tail); | |
2160 | tail->type = REF_ARRAY; | |
2161 | ||
a8006d09 JJ |
2162 | /* In EQUIVALENCE, we don't know yet whether we are seeing |
2163 | an array, character variable or array of character | |
edf1eac2 | 2164 | variables. We'll leave the decision till resolve time. */ |
6de9cd9a | 2165 | |
102344e2 TB |
2166 | if (equiv_flag) |
2167 | as = NULL; | |
2168 | else if (sym->ts.type == BT_CLASS && CLASS_DATA (sym)) | |
2169 | as = CLASS_DATA (sym)->as; | |
2170 | else | |
2171 | as = sym->as; | |
2172 | ||
2173 | m = gfc_match_array_ref (&tail->u.ar, as, equiv_flag, | |
2174 | as ? as->corank : 0); | |
6de9cd9a DN |
2175 | if (m != MATCH_YES) |
2176 | return m; | |
a8006d09 | 2177 | |
3c721513 | 2178 | gfc_gobble_whitespace (); |
8fc541d3 | 2179 | if (equiv_flag && gfc_peek_ascii_char () == '(') |
a8006d09 JJ |
2180 | { |
2181 | tail = extend_ref (primary, tail); | |
2182 | tail->type = REF_ARRAY; | |
2183 | ||
d3a9eea2 | 2184 | m = gfc_match_array_ref (&tail->u.ar, NULL, equiv_flag, 0); |
a8006d09 JJ |
2185 | if (m != MATCH_YES) |
2186 | return m; | |
2187 | } | |
6de9cd9a DN |
2188 | } |
2189 | ||
6de9cd9a DN |
2190 | primary->ts = sym->ts; |
2191 | ||
a8006d09 JJ |
2192 | if (equiv_flag) |
2193 | return MATCH_YES; | |
2194 | ||
f6288c24 FR |
2195 | /* With DEC extensions, member separator may be '.' or '%'. */ |
2196 | sep = gfc_peek_ascii_char (); | |
2197 | m = gfc_match_member_sep (sym); | |
2198 | if (m == MATCH_ERROR) | |
2199 | return MATCH_ERROR; | |
2200 | ||
a5fbc2f3 PT |
2201 | inquiry = false; |
2202 | if (m == MATCH_YES && sep == '%' | |
2203 | && primary->ts.type != BT_CLASS | |
2204 | && primary->ts.type != BT_DERIVED) | |
2205 | { | |
2206 | match mm; | |
2207 | old_loc = gfc_current_locus; | |
2208 | mm = gfc_match_name (name); | |
2209 | if (mm == MATCH_YES && is_inquiry_ref (name, &tmp)) | |
2210 | inquiry = true; | |
2211 | gfc_current_locus = old_loc; | |
2212 | } | |
2213 | ||
f6288c24 | 2214 | if (sym->ts.type == BT_UNKNOWN && m == MATCH_YES |
713485cc | 2215 | && gfc_get_default_type (sym->name, sym->ns)->type == BT_DERIVED) |
ebac6d9c DK |
2216 | gfc_set_default_type (sym, 0, sym->ns); |
2217 | ||
b89a63b9 | 2218 | /* See if there is a usable typespec in the "no IMPLICIT type" error. */ |
f6288c24 | 2219 | if (sym->ts.type == BT_UNKNOWN && m == MATCH_YES) |
6ee65df3 | 2220 | { |
b89a63b9 PT |
2221 | bool permissible; |
2222 | ||
a8399af8 | 2223 | /* These target expressions can be resolved at any time. */ |
b89a63b9 PT |
2224 | permissible = tgt_expr && tgt_expr->symtree && tgt_expr->symtree->n.sym |
2225 | && (tgt_expr->symtree->n.sym->attr.use_assoc | |
2226 | || tgt_expr->symtree->n.sym->attr.host_assoc | |
2227 | || tgt_expr->symtree->n.sym->attr.if_source | |
2228 | == IFSRC_DECL); | |
2229 | permissible = permissible | |
2230 | || (tgt_expr && tgt_expr->expr_type == EXPR_OP); | |
2231 | ||
2232 | if (permissible) | |
62d3c075 | 2233 | { |
b89a63b9 PT |
2234 | gfc_resolve_expr (tgt_expr); |
2235 | sym->ts = tgt_expr->ts; | |
62d3c075 PT |
2236 | } |
2237 | ||
2238 | if (sym->ts.type == BT_UNKNOWN) | |
2239 | { | |
2240 | gfc_error ("Symbol %qs at %C has no IMPLICIT type", sym->name); | |
2241 | return MATCH_ERROR; | |
2242 | } | |
6ee65df3 TB |
2243 | } |
2244 | else if ((sym->ts.type != BT_DERIVED && sym->ts.type != BT_CLASS) | |
a5fbc2f3 | 2245 | && m == MATCH_YES && !inquiry) |
6ee65df3 | 2246 | { |
f6288c24 FR |
2247 | gfc_error ("Unexpected %<%c%> for nonderived-type variable %qs at %C", |
2248 | sep, sym->name); | |
6ee65df3 TB |
2249 | return MATCH_ERROR; |
2250 | } | |
2251 | ||
a5fbc2f3 | 2252 | if ((sym->ts.type != BT_DERIVED && sym->ts.type != BT_CLASS && !inquiry) |
f6288c24 | 2253 | || m != MATCH_YES) |
6de9cd9a DN |
2254 | goto check_substring; |
2255 | ||
a5fbc2f3 PT |
2256 | if (!inquiry) |
2257 | sym = sym->ts.u.derived; | |
2258 | else | |
2259 | sym = NULL; | |
6de9cd9a DN |
2260 | |
2261 | for (;;) | |
2262 | { | |
524af0d6 | 2263 | bool t; |
e157f736 | 2264 | gfc_symtree *tbp; |
8e1f752a | 2265 | |
6de9cd9a DN |
2266 | m = gfc_match_name (name); |
2267 | if (m == MATCH_NO) | |
2268 | gfc_error ("Expected structure component name at %C"); | |
2269 | if (m != MATCH_YES) | |
2270 | return MATCH_ERROR; | |
2271 | ||
f79be3a7 | 2272 | intrinsic = false; |
a5fbc2f3 PT |
2273 | if (primary->ts.type != BT_CLASS && primary->ts.type != BT_DERIVED) |
2274 | { | |
2275 | inquiry = is_inquiry_ref (name, &tmp); | |
2276 | if (inquiry) | |
2277 | sym = NULL; | |
f79be3a7 | 2278 | |
d4c10c9f ME |
2279 | if (sep == '%') |
2280 | { | |
2281 | if (tmp) | |
2282 | { | |
dd38c765 HA |
2283 | switch (tmp->u.i) |
2284 | { | |
2285 | case INQUIRY_RE: | |
2286 | case INQUIRY_IM: | |
2287 | if (!gfc_notify_std (GFC_STD_F2008, | |
2288 | "RE or IM part_ref at %C")) | |
2289 | return MATCH_ERROR; | |
2290 | break; | |
2291 | ||
2292 | case INQUIRY_KIND: | |
2293 | if (!gfc_notify_std (GFC_STD_F2003, | |
2294 | "KIND part_ref at %C")) | |
2295 | return MATCH_ERROR; | |
2296 | break; | |
2297 | ||
2298 | case INQUIRY_LEN: | |
2299 | if (!gfc_notify_std (GFC_STD_F2003, "LEN part_ref at %C")) | |
2300 | return MATCH_ERROR; | |
2301 | break; | |
2302 | } | |
2303 | ||
d4c10c9f ME |
2304 | if ((tmp->u.i == INQUIRY_RE || tmp->u.i == INQUIRY_IM) |
2305 | && primary->ts.type != BT_COMPLEX) | |
2306 | { | |
2307 | gfc_error ("The RE or IM part_ref at %C must be " | |
2308 | "applied to a COMPLEX expression"); | |
2309 | return MATCH_ERROR; | |
2310 | } | |
2311 | else if (tmp->u.i == INQUIRY_LEN | |
2312 | && primary->ts.type != BT_CHARACTER) | |
2313 | { | |
2314 | gfc_error ("The LEN part_ref at %C must be applied " | |
2315 | "to a CHARACTER expression"); | |
2316 | return MATCH_ERROR; | |
2317 | } | |
2318 | } | |
2319 | if (primary->ts.type != BT_UNKNOWN) | |
2320 | intrinsic = true; | |
2321 | } | |
a5fbc2f3 PT |
2322 | } |
2323 | else | |
2324 | inquiry = false; | |
2325 | ||
d5c50b02 | 2326 | if (sym && sym->f2k_derived) |
b2acf594 PT |
2327 | tbp = gfc_find_typebound_proc (sym, &t, name, false, &gfc_current_locus); |
2328 | else | |
2329 | tbp = NULL; | |
2330 | ||
8e1f752a DK |
2331 | if (tbp) |
2332 | { | |
2333 | gfc_symbol* tbp_sym; | |
2334 | ||
524af0d6 | 2335 | if (!t) |
8e1f752a DK |
2336 | return MATCH_ERROR; |
2337 | ||
2338 | gcc_assert (!tail || !tail->next); | |
236e3815 JW |
2339 | |
2340 | if (!(primary->expr_type == EXPR_VARIABLE | |
2341 | || (primary->expr_type == EXPR_STRUCTURE | |
2342 | && primary->symtree && primary->symtree->n.sym | |
2343 | && primary->symtree->n.sym->attr.flavor))) | |
2344 | return MATCH_ERROR; | |
8e1f752a | 2345 | |
e34ccb4c | 2346 | if (tbp->n.tb->is_generic) |
e157f736 DK |
2347 | tbp_sym = NULL; |
2348 | else | |
e34ccb4c | 2349 | tbp_sym = tbp->n.tb->u.specific->n.sym; |
8e1f752a DK |
2350 | |
2351 | primary->expr_type = EXPR_COMPCALL; | |
e34ccb4c | 2352 | primary->value.compcall.tbp = tbp->n.tb; |
e157f736 | 2353 | primary->value.compcall.name = tbp->name; |
4a44a72d DK |
2354 | primary->value.compcall.ignore_pass = 0; |
2355 | primary->value.compcall.assign = 0; | |
2356 | primary->value.compcall.base_object = NULL; | |
e157f736 DK |
2357 | gcc_assert (primary->symtree->n.sym->attr.referenced); |
2358 | if (tbp_sym) | |
2359 | primary->ts = tbp_sym->ts; | |
049bb74e JW |
2360 | else |
2361 | gfc_clear_ts (&primary->ts); | |
e157f736 | 2362 | |
e34ccb4c | 2363 | m = gfc_match_actual_arglist (tbp->n.tb->subroutine, |
8e1f752a DK |
2364 | &primary->value.compcall.actual); |
2365 | if (m == MATCH_ERROR) | |
2366 | return MATCH_ERROR; | |
2367 | if (m == MATCH_NO) | |
2368 | { | |
2369 | if (sub_flag) | |
2370 | primary->value.compcall.actual = NULL; | |
2371 | else | |
2372 | { | |
2373 | gfc_error ("Expected argument list at %C"); | |
2374 | return MATCH_ERROR; | |
2375 | } | |
2376 | } | |
2377 | ||
8e1f752a DK |
2378 | break; |
2379 | } | |
2380 | ||
e41da823 PT |
2381 | previous = component; |
2382 | ||
f79be3a7 | 2383 | if (!inquiry && !intrinsic) |
a5fbc2f3 PT |
2384 | component = gfc_find_component (sym, name, false, false, &tmp); |
2385 | else | |
2386 | component = NULL; | |
2387 | ||
f79be3a7 | 2388 | if (intrinsic && !inquiry) |
5ee5415a PT |
2389 | { |
2390 | if (previous) | |
2391 | gfc_error ("%qs at %C is not an inquiry reference to an intrinsic " | |
2392 | "type component %qs", name, previous->name); | |
2393 | else | |
2394 | gfc_error ("%qs at %C is not an inquiry reference to an intrinsic " | |
2395 | "type component", name); | |
e41da823 | 2396 | return MATCH_ERROR; |
5ee5415a | 2397 | } |
f79be3a7 | 2398 | else if (component == NULL && !inquiry) |
6de9cd9a DN |
2399 | return MATCH_ERROR; |
2400 | ||
a5fbc2f3 PT |
2401 | /* Extend the reference chain determined by gfc_find_component or |
2402 | is_inquiry_ref. */ | |
f6288c24 | 2403 | if (primary->ref == NULL) |
a5fbc2f3 | 2404 | primary->ref = tmp; |
f6288c24 | 2405 | else |
a5fbc2f3 PT |
2406 | { |
2407 | /* Set by the for loop below for the last component ref. */ | |
2408 | gcc_assert (tail != NULL); | |
2409 | tail->next = tmp; | |
2410 | } | |
6de9cd9a | 2411 | |
f6288c24 | 2412 | /* The reference chain may be longer than one hop for union |
a5fbc2f3 | 2413 | subcomponents; find the new tail. */ |
f6288c24 | 2414 | for (tail = tmp; tail->next; tail = tail->next) |
a5fbc2f3 PT |
2415 | ; |
2416 | ||
2417 | if (tmp && tmp->type == REF_INQUIRY) | |
2418 | { | |
307de100 SK |
2419 | if (!primary->where.lb || !primary->where.nextc) |
2420 | primary->where = gfc_current_locus; | |
a5fbc2f3 PT |
2421 | gfc_simplify_expr (primary, 0); |
2422 | ||
2423 | if (primary->expr_type == EXPR_CONSTANT) | |
2424 | goto check_done; | |
2425 | ||
2426 | switch (tmp->u.i) | |
2427 | { | |
2428 | case INQUIRY_RE: | |
2429 | case INQUIRY_IM: | |
2430 | if (!gfc_notify_std (GFC_STD_F2008, "RE or IM part_ref at %C")) | |
2431 | return MATCH_ERROR; | |
2432 | ||
2433 | if (primary->ts.type != BT_COMPLEX) | |
2434 | { | |
2435 | gfc_error ("The RE or IM part_ref at %C must be " | |
2436 | "applied to a COMPLEX expression"); | |
2437 | return MATCH_ERROR; | |
2438 | } | |
2439 | primary->ts.type = BT_REAL; | |
2440 | break; | |
2441 | ||
2442 | case INQUIRY_LEN: | |
2443 | if (!gfc_notify_std (GFC_STD_F2003, "LEN part_ref at %C")) | |
2444 | return MATCH_ERROR; | |
2445 | ||
2446 | if (primary->ts.type != BT_CHARACTER) | |
2447 | { | |
2448 | gfc_error ("The LEN part_ref at %C must be applied " | |
2449 | "to a CHARACTER expression"); | |
2450 | return MATCH_ERROR; | |
2451 | } | |
2452 | primary->ts.u.cl = NULL; | |
2453 | primary->ts.type = BT_INTEGER; | |
2454 | primary->ts.kind = gfc_default_integer_kind; | |
2455 | break; | |
2456 | ||
2457 | case INQUIRY_KIND: | |
2458 | if (!gfc_notify_std (GFC_STD_F2003, "KIND part_ref at %C")) | |
2459 | return MATCH_ERROR; | |
2460 | ||
2461 | if (primary->ts.type == BT_CLASS | |
2462 | || primary->ts.type == BT_DERIVED) | |
2463 | { | |
2464 | gfc_error ("The KIND part_ref at %C must be applied " | |
2465 | "to an expression of intrinsic type"); | |
2466 | return MATCH_ERROR; | |
2467 | } | |
2468 | primary->ts.type = BT_INTEGER; | |
2469 | primary->ts.kind = gfc_default_integer_kind; | |
2470 | break; | |
2471 | ||
2472 | default: | |
2473 | gcc_unreachable (); | |
2474 | } | |
2475 | ||
2476 | goto check_done; | |
2477 | } | |
6de9cd9a DN |
2478 | |
2479 | primary->ts = component->ts; | |
2480 | ||
a4a76e52 | 2481 | if (component->attr.proc_pointer && ppc_arg) |
713485cc | 2482 | { |
837c4b78 | 2483 | /* Procedure pointer component call: Look for argument list. */ |
23878536 | 2484 | m = gfc_match_actual_arglist (sub_flag, |
713485cc JW |
2485 | &primary->value.compcall.actual); |
2486 | if (m == MATCH_ERROR) | |
2487 | return MATCH_ERROR; | |
837c4b78 JW |
2488 | |
2489 | if (m == MATCH_NO && !gfc_matching_ptr_assignment | |
a4a76e52 | 2490 | && !gfc_matching_procptr_assignment && !matching_actual_arglist) |
837c4b78 | 2491 | { |
a4d9b221 | 2492 | gfc_error ("Procedure pointer component %qs requires an " |
837c4b78 JW |
2493 | "argument list at %C", component->name); |
2494 | return MATCH_ERROR; | |
2495 | } | |
2496 | ||
23878536 JW |
2497 | if (m == MATCH_YES) |
2498 | primary->expr_type = EXPR_PPC; | |
713485cc JW |
2499 | |
2500 | break; | |
2501 | } | |
2502 | ||
c74b74a8 | 2503 | if (component->as != NULL && !component->attr.proc_pointer) |
6de9cd9a DN |
2504 | { |
2505 | tail = extend_ref (primary, tail); | |
2506 | tail->type = REF_ARRAY; | |
2507 | ||
d3a9eea2 TB |
2508 | m = gfc_match_array_ref (&tail->u.ar, component->as, equiv_flag, |
2509 | component->as->corank); | |
6de9cd9a DN |
2510 | if (m != MATCH_YES) |
2511 | return m; | |
2512 | } | |
156c0160 JW |
2513 | else if (component->ts.type == BT_CLASS && component->attr.class_ok |
2514 | && CLASS_DATA (component)->as && !component->attr.proc_pointer) | |
cf2b3c22 TB |
2515 | { |
2516 | tail = extend_ref (primary, tail); | |
2517 | tail->type = REF_ARRAY; | |
6de9cd9a | 2518 | |
7a08eda1 | 2519 | m = gfc_match_array_ref (&tail->u.ar, CLASS_DATA (component)->as, |
d3a9eea2 | 2520 | equiv_flag, |
7a08eda1 | 2521 | CLASS_DATA (component)->as->corank); |
cf2b3c22 TB |
2522 | if (m != MATCH_YES) |
2523 | return m; | |
2524 | } | |
2525 | ||
a5fbc2f3 PT |
2526 | check_done: |
2527 | /* In principle, we could have eg. expr%re%kind so we must allow for | |
2528 | this possibility. */ | |
2529 | if (gfc_match_char ('%') == MATCH_YES) | |
2530 | { | |
2531 | if (component && (component->ts.type == BT_DERIVED | |
2532 | || component->ts.type == BT_CLASS)) | |
2533 | sym = component->ts.u.derived; | |
2534 | continue; | |
2535 | } | |
2536 | else if (inquiry) | |
2537 | break; | |
2538 | ||
cf2b3c22 | 2539 | if ((component->ts.type != BT_DERIVED && component->ts.type != BT_CLASS) |
a5fbc2f3 | 2540 | || gfc_match_member_sep (component->ts.u.derived) != MATCH_YES) |
6de9cd9a DN |
2541 | break; |
2542 | ||
a5fbc2f3 PT |
2543 | if (component->ts.type == BT_DERIVED || component->ts.type == BT_CLASS) |
2544 | sym = component->ts.u.derived; | |
6de9cd9a DN |
2545 | } |
2546 | ||
2547 | check_substring: | |
f2d3cb25 | 2548 | unknown = false; |
f6288c24 | 2549 | if (primary->ts.type == BT_UNKNOWN && !gfc_fl_struct (sym->attr.flavor)) |
c040ffff | 2550 | { |
713485cc | 2551 | if (gfc_get_default_type (sym->name, sym->ns)->type == BT_CHARACTER) |
c040ffff | 2552 | { |
edf1eac2 SK |
2553 | gfc_set_default_type (sym, 0, sym->ns); |
2554 | primary->ts = sym->ts; | |
f2d3cb25 | 2555 | unknown = true; |
c040ffff TS |
2556 | } |
2557 | } | |
2558 | ||
6de9cd9a DN |
2559 | if (primary->ts.type == BT_CHARACTER) |
2560 | { | |
38217d3e PT |
2561 | bool def = primary->ts.deferred == 1; |
2562 | switch (match_substring (primary->ts.u.cl, equiv_flag, &substring, def)) | |
6de9cd9a DN |
2563 | { |
2564 | case MATCH_YES: | |
2565 | if (tail == NULL) | |
2566 | primary->ref = substring; | |
2567 | else | |
2568 | tail->next = substring; | |
2569 | ||
2570 | if (primary->expr_type == EXPR_CONSTANT) | |
2571 | primary->expr_type = EXPR_SUBSTRING; | |
2572 | ||
860c8f3b | 2573 | if (substring) |
bc21d315 | 2574 | primary->ts.u.cl = NULL; |
860c8f3b | 2575 | |
6de9cd9a DN |
2576 | break; |
2577 | ||
2578 | case MATCH_NO: | |
f2d3cb25 | 2579 | if (unknown) |
858f1fa2 DK |
2580 | { |
2581 | gfc_clear_ts (&primary->ts); | |
2582 | gfc_clear_ts (&sym->ts); | |
2583 | } | |
6de9cd9a DN |
2584 | break; |
2585 | ||
2586 | case MATCH_ERROR: | |
2587 | return MATCH_ERROR; | |
2588 | } | |
2589 | } | |
2590 | ||
4ceda204 JW |
2591 | /* F08:C611. */ |
2592 | if (primary->ts.type == BT_DERIVED && primary->ref | |
2593 | && primary->ts.u.derived && primary->ts.u.derived->attr.abstract) | |
2594 | { | |
2595 | gfc_error ("Nonpolymorphic reference to abstract type at %C"); | |
2596 | return MATCH_ERROR; | |
2597 | } | |
2598 | ||
2599 | /* F08:C727. */ | |
d3a9eea2 TB |
2600 | if (primary->expr_type == EXPR_PPC && gfc_is_coindexed (primary)) |
2601 | { | |
2602 | gfc_error ("Coindexed procedure-pointer component at %C"); | |
2603 | return MATCH_ERROR; | |
2604 | } | |
2605 | ||
6de9cd9a DN |
2606 | return MATCH_YES; |
2607 | } | |
2608 | ||
2609 | ||
2610 | /* Given an expression that is a variable, figure out what the | |
2611 | ultimate variable's type and attribute is, traversing the reference | |
2612 | structures if necessary. | |
2613 | ||
2614 | This subroutine is trickier than it looks. We start at the base | |
2615 | symbol and store the attribute. Component references load a | |
2616 | completely new attribute. | |
2617 | ||
2618 | A couple of rules come into play. Subobjects of targets are always | |
2619 | targets themselves. If we see a component that goes through a | |
2620 | pointer, then the expression must also be a target, since the | |
2621 | pointer is associated with something (if it isn't core will soon be | |
2622 | dumped). If we see a full part or section of an array, the | |
2623 | expression is also an array. | |
2624 | ||
f7b529fa | 2625 | We can have at most one full array reference. */ |
6de9cd9a DN |
2626 | |
2627 | symbol_attribute | |
edf1eac2 | 2628 | gfc_variable_attr (gfc_expr *expr, gfc_typespec *ts) |
6de9cd9a | 2629 | { |
16acb1a8 | 2630 | int dimension, codimension, pointer, allocatable, target; |
6de9cd9a DN |
2631 | symbol_attribute attr; |
2632 | gfc_ref *ref; | |
cf2b3c22 TB |
2633 | gfc_symbol *sym; |
2634 | gfc_component *comp; | |
a5fbc2f3 | 2635 | bool has_inquiry_part; |
6de9cd9a | 2636 | |
50dbf0b4 | 2637 | if (expr->expr_type != EXPR_VARIABLE && expr->expr_type != EXPR_FUNCTION) |
6de9cd9a DN |
2638 | gfc_internal_error ("gfc_variable_attr(): Expression isn't a variable"); |
2639 | ||
cf2b3c22 TB |
2640 | sym = expr->symtree->n.sym; |
2641 | attr = sym->attr; | |
6de9cd9a | 2642 | |
70c884a4 | 2643 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok && sym->ts.u.derived) |
cf2b3c22 | 2644 | { |
7a08eda1 | 2645 | dimension = CLASS_DATA (sym)->attr.dimension; |
83ba23b7 | 2646 | codimension = CLASS_DATA (sym)->attr.codimension; |
d40477b4 | 2647 | pointer = CLASS_DATA (sym)->attr.class_pointer; |
7a08eda1 | 2648 | allocatable = CLASS_DATA (sym)->attr.allocatable; |
cf2b3c22 TB |
2649 | } |
2650 | else | |
2651 | { | |
2652 | dimension = attr.dimension; | |
83ba23b7 | 2653 | codimension = attr.codimension; |
cf2b3c22 TB |
2654 | pointer = attr.pointer; |
2655 | allocatable = attr.allocatable; | |
2656 | } | |
6de9cd9a DN |
2657 | |
2658 | target = attr.target; | |
713485cc | 2659 | if (pointer || attr.proc_pointer) |
6de9cd9a DN |
2660 | target = 1; |
2661 | ||
2662 | if (ts != NULL && expr->ts.type == BT_UNKNOWN) | |
cf2b3c22 | 2663 | *ts = sym->ts; |
6de9cd9a | 2664 | |
a5fbc2f3 PT |
2665 | has_inquiry_part = false; |
2666 | for (ref = expr->ref; ref; ref = ref->next) | |
2667 | if (ref->type == REF_INQUIRY) | |
2668 | { | |
2669 | has_inquiry_part = true; | |
2670 | break; | |
2671 | } | |
2672 | ||
8c91ab34 | 2673 | for (ref = expr->ref; ref; ref = ref->next) |
6de9cd9a DN |
2674 | switch (ref->type) |
2675 | { | |
2676 | case REF_ARRAY: | |
2677 | ||
2678 | switch (ref->u.ar.type) | |
2679 | { | |
2680 | case AR_FULL: | |
2681 | dimension = 1; | |
2682 | break; | |
2683 | ||
2684 | case AR_SECTION: | |
5046aff5 | 2685 | allocatable = pointer = 0; |
6de9cd9a DN |
2686 | dimension = 1; |
2687 | break; | |
2688 | ||
2689 | case AR_ELEMENT: | |
d3a9eea2 TB |
2690 | /* Handle coarrays. */ |
2691 | if (ref->u.ar.dimen > 0) | |
2692 | allocatable = pointer = 0; | |
6de9cd9a DN |
2693 | break; |
2694 | ||
2695 | case AR_UNKNOWN: | |
4f81c2a3 | 2696 | /* For standard conforming code, AR_UNKNOWN should not happen. |
f79be3a7 | 2697 | For nonconforming code, gfortran can end up here. Treat it |
4f81c2a3 SK |
2698 | as a no-op. */ |
2699 | break; | |
6de9cd9a DN |
2700 | } |
2701 | ||
2702 | break; | |
2703 | ||
2704 | case REF_COMPONENT: | |
cf2b3c22 TB |
2705 | comp = ref->u.c.component; |
2706 | attr = comp->attr; | |
a5fbc2f3 | 2707 | if (ts != NULL && !has_inquiry_part) |
e8a25349 | 2708 | { |
cf2b3c22 | 2709 | *ts = comp->ts; |
e8a25349 TS |
2710 | /* Don't set the string length if a substring reference |
2711 | follows. */ | |
2712 | if (ts->type == BT_CHARACTER | |
2713 | && ref->next && ref->next->type == REF_SUBSTRING) | |
bc21d315 | 2714 | ts->u.cl = NULL; |
e8a25349 | 2715 | } |
6de9cd9a | 2716 | |
cf2b3c22 TB |
2717 | if (comp->ts.type == BT_CLASS) |
2718 | { | |
83ba23b7 | 2719 | codimension = CLASS_DATA (comp)->attr.codimension; |
d40477b4 | 2720 | pointer = CLASS_DATA (comp)->attr.class_pointer; |
7a08eda1 | 2721 | allocatable = CLASS_DATA (comp)->attr.allocatable; |
cf2b3c22 TB |
2722 | } |
2723 | else | |
2724 | { | |
83ba23b7 | 2725 | codimension = comp->attr.codimension; |
cf2b3c22 TB |
2726 | pointer = comp->attr.pointer; |
2727 | allocatable = comp->attr.allocatable; | |
2728 | } | |
713485cc | 2729 | if (pointer || attr.proc_pointer) |
6de9cd9a DN |
2730 | target = 1; |
2731 | ||
2732 | break; | |
2733 | ||
a5fbc2f3 | 2734 | case REF_INQUIRY: |
6de9cd9a | 2735 | case REF_SUBSTRING: |
5046aff5 | 2736 | allocatable = pointer = 0; |
6de9cd9a DN |
2737 | break; |
2738 | } | |
2739 | ||
2740 | attr.dimension = dimension; | |
83ba23b7 | 2741 | attr.codimension = codimension; |
6de9cd9a | 2742 | attr.pointer = pointer; |
5046aff5 | 2743 | attr.allocatable = allocatable; |
6de9cd9a | 2744 | attr.target = target; |
80f95228 | 2745 | attr.save = sym->attr.save; |
6de9cd9a DN |
2746 | |
2747 | return attr; | |
2748 | } | |
2749 | ||
2750 | ||
2751 | /* Return the attribute from a general expression. */ | |
2752 | ||
2753 | symbol_attribute | |
edf1eac2 | 2754 | gfc_expr_attr (gfc_expr *e) |
6de9cd9a DN |
2755 | { |
2756 | symbol_attribute attr; | |
2757 | ||
2758 | switch (e->expr_type) | |
2759 | { | |
2760 | case EXPR_VARIABLE: | |
2761 | attr = gfc_variable_attr (e, NULL); | |
2762 | break; | |
2763 | ||
2764 | case EXPR_FUNCTION: | |
2765 | gfc_clear_attr (&attr); | |
2766 | ||
50c7654b | 2767 | if (e->value.function.esym && e->value.function.esym->result) |
cf2b3c22 TB |
2768 | { |
2769 | gfc_symbol *sym = e->value.function.esym->result; | |
2770 | attr = sym->attr; | |
2771 | if (sym->ts.type == BT_CLASS) | |
2772 | { | |
7a08eda1 | 2773 | attr.dimension = CLASS_DATA (sym)->attr.dimension; |
d40477b4 | 2774 | attr.pointer = CLASS_DATA (sym)->attr.class_pointer; |
7a08eda1 | 2775 | attr.allocatable = CLASS_DATA (sym)->attr.allocatable; |
cf2b3c22 TB |
2776 | } |
2777 | } | |
574284e9 AV |
2778 | else if (e->value.function.isym |
2779 | && e->value.function.isym->transformational | |
2780 | && e->ts.type == BT_CLASS) | |
2781 | attr = CLASS_DATA (e)->attr; | |
50dbf0b4 JW |
2782 | else |
2783 | attr = gfc_variable_attr (e, NULL); | |
6de9cd9a DN |
2784 | |
2785 | /* TODO: NULL() returns pointers. May have to take care of this | |
edf1eac2 | 2786 | here. */ |
6de9cd9a DN |
2787 | |
2788 | break; | |
2789 | ||
2790 | default: | |
3c9f5092 AV |
2791 | gfc_clear_attr (&attr); |
2792 | break; | |
2793 | } | |
2794 | ||
2795 | return attr; | |
2796 | } | |
2797 | ||
2798 | ||
2799 | /* Given an expression, figure out what the ultimate expression | |
2800 | attribute is. This routine is similar to gfc_variable_attr with | |
2801 | parts of gfc_expr_attr, but focuses more on the needs of | |
2802 | coarrays. For coarrays a codimension attribute is kind of | |
ba85c8c3 AV |
2803 | "infectious" being propagated once set and never cleared. |
2804 | The coarray_comp is only set, when the expression refs a coarray | |
2805 | component. REFS_COMP is set when present to true only, when this EXPR | |
2806 | refs a (non-_data) component. To check whether EXPR refs an allocatable | |
2807 | component in a derived type coarray *refs_comp needs to be set and | |
2808 | coarray_comp has to false. */ | |
3c9f5092 AV |
2809 | |
2810 | static symbol_attribute | |
ba85c8c3 | 2811 | caf_variable_attr (gfc_expr *expr, bool in_allocate, bool *refs_comp) |
3c9f5092 | 2812 | { |
de91486c | 2813 | int dimension, codimension, pointer, allocatable, target, coarray_comp; |
3c9f5092 AV |
2814 | symbol_attribute attr; |
2815 | gfc_ref *ref; | |
2816 | gfc_symbol *sym; | |
2817 | gfc_component *comp; | |
2818 | ||
2819 | if (expr->expr_type != EXPR_VARIABLE && expr->expr_type != EXPR_FUNCTION) | |
2820 | gfc_internal_error ("gfc_caf_attr(): Expression isn't a variable"); | |
2821 | ||
2822 | sym = expr->symtree->n.sym; | |
2823 | gfc_clear_attr (&attr); | |
2824 | ||
ba85c8c3 | 2825 | if (refs_comp) |
525a5e33 | 2826 | *refs_comp = false; |
ba85c8c3 | 2827 | |
3c9f5092 AV |
2828 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok) |
2829 | { | |
2830 | dimension = CLASS_DATA (sym)->attr.dimension; | |
2831 | codimension = CLASS_DATA (sym)->attr.codimension; | |
2832 | pointer = CLASS_DATA (sym)->attr.class_pointer; | |
2833 | allocatable = CLASS_DATA (sym)->attr.allocatable; | |
de91486c AV |
2834 | attr.alloc_comp = CLASS_DATA (sym)->ts.u.derived->attr.alloc_comp; |
2835 | attr.pointer_comp = CLASS_DATA (sym)->ts.u.derived->attr.pointer_comp; | |
3c9f5092 AV |
2836 | } |
2837 | else | |
2838 | { | |
2839 | dimension = sym->attr.dimension; | |
2840 | codimension = sym->attr.codimension; | |
2841 | pointer = sym->attr.pointer; | |
2842 | allocatable = sym->attr.allocatable; | |
de91486c | 2843 | attr.alloc_comp = sym->ts.type == BT_DERIVED |
3c9f5092 | 2844 | ? sym->ts.u.derived->attr.alloc_comp : 0; |
de91486c AV |
2845 | attr.pointer_comp = sym->ts.type == BT_DERIVED |
2846 | ? sym->ts.u.derived->attr.pointer_comp : 0; | |
3c9f5092 AV |
2847 | } |
2848 | ||
ba85c8c3 | 2849 | target = coarray_comp = 0; |
3c9f5092 AV |
2850 | if (pointer || attr.proc_pointer) |
2851 | target = 1; | |
2852 | ||
2853 | for (ref = expr->ref; ref; ref = ref->next) | |
2854 | switch (ref->type) | |
2855 | { | |
2856 | case REF_ARRAY: | |
2857 | ||
2858 | switch (ref->u.ar.type) | |
2859 | { | |
2860 | case AR_FULL: | |
2861 | case AR_SECTION: | |
2862 | dimension = 1; | |
2863 | break; | |
2864 | ||
2865 | case AR_ELEMENT: | |
2866 | /* Handle coarrays. */ | |
2867 | if (ref->u.ar.dimen > 0 && !in_allocate) | |
2868 | allocatable = pointer = 0; | |
2869 | break; | |
2870 | ||
2871 | case AR_UNKNOWN: | |
2872 | /* If any of start, end or stride is not integer, there will | |
2873 | already have been an error issued. */ | |
2874 | int errors; | |
2875 | gfc_get_errors (NULL, &errors); | |
2876 | if (errors == 0) | |
2877 | gfc_internal_error ("gfc_caf_attr(): Bad array reference"); | |
2878 | } | |
2879 | ||
2880 | break; | |
2881 | ||
2882 | case REF_COMPONENT: | |
2883 | comp = ref->u.c.component; | |
2884 | ||
2885 | if (comp->ts.type == BT_CLASS) | |
2886 | { | |
ba85c8c3 AV |
2887 | /* Set coarray_comp only, when this component introduces the |
2888 | coarray. */ | |
2889 | coarray_comp = !codimension && CLASS_DATA (comp)->attr.codimension; | |
3c9f5092 AV |
2890 | codimension |= CLASS_DATA (comp)->attr.codimension; |
2891 | pointer = CLASS_DATA (comp)->attr.class_pointer; | |
2892 | allocatable = CLASS_DATA (comp)->attr.allocatable; | |
3c9f5092 AV |
2893 | } |
2894 | else | |
2895 | { | |
ba85c8c3 AV |
2896 | /* Set coarray_comp only, when this component introduces the |
2897 | coarray. */ | |
2898 | coarray_comp = !codimension && comp->attr.codimension; | |
3c9f5092 AV |
2899 | codimension |= comp->attr.codimension; |
2900 | pointer = comp->attr.pointer; | |
2901 | allocatable = comp->attr.allocatable; | |
3c9f5092 AV |
2902 | } |
2903 | ||
525a5e33 AV |
2904 | if (refs_comp && strcmp (comp->name, "_data") != 0 |
2905 | && (ref->next == NULL | |
2906 | || (ref->next->type == REF_ARRAY && ref->next->next == NULL))) | |
2907 | *refs_comp = true; | |
ba85c8c3 | 2908 | |
3c9f5092 AV |
2909 | if (pointer || attr.proc_pointer) |
2910 | target = 1; | |
2911 | ||
2912 | break; | |
2913 | ||
2914 | case REF_SUBSTRING: | |
a5fbc2f3 | 2915 | case REF_INQUIRY: |
3c9f5092 AV |
2916 | allocatable = pointer = 0; |
2917 | break; | |
2918 | } | |
2919 | ||
2920 | attr.dimension = dimension; | |
2921 | attr.codimension = codimension; | |
2922 | attr.pointer = pointer; | |
2923 | attr.allocatable = allocatable; | |
2924 | attr.target = target; | |
2925 | attr.save = sym->attr.save; | |
2926 | attr.coarray_comp = coarray_comp; | |
3c9f5092 AV |
2927 | |
2928 | return attr; | |
2929 | } | |
2930 | ||
2931 | ||
2932 | symbol_attribute | |
ba85c8c3 | 2933 | gfc_caf_attr (gfc_expr *e, bool in_allocate, bool *refs_comp) |
3c9f5092 AV |
2934 | { |
2935 | symbol_attribute attr; | |
2936 | ||
2937 | switch (e->expr_type) | |
2938 | { | |
2939 | case EXPR_VARIABLE: | |
ba85c8c3 | 2940 | attr = caf_variable_attr (e, in_allocate, refs_comp); |
3c9f5092 AV |
2941 | break; |
2942 | ||
2943 | case EXPR_FUNCTION: | |
2944 | gfc_clear_attr (&attr); | |
2945 | ||
2946 | if (e->value.function.esym && e->value.function.esym->result) | |
2947 | { | |
2948 | gfc_symbol *sym = e->value.function.esym->result; | |
2949 | attr = sym->attr; | |
2950 | if (sym->ts.type == BT_CLASS) | |
2951 | { | |
2952 | attr.dimension = CLASS_DATA (sym)->attr.dimension; | |
2953 | attr.pointer = CLASS_DATA (sym)->attr.class_pointer; | |
2954 | attr.allocatable = CLASS_DATA (sym)->attr.allocatable; | |
2955 | attr.alloc_comp = CLASS_DATA (sym)->ts.u.derived->attr.alloc_comp; | |
de91486c AV |
2956 | attr.pointer_comp = CLASS_DATA (sym)->ts.u.derived |
2957 | ->attr.pointer_comp; | |
3c9f5092 AV |
2958 | } |
2959 | } | |
2960 | else if (e->symtree) | |
ba85c8c3 | 2961 | attr = caf_variable_attr (e, in_allocate, refs_comp); |
3c9f5092 AV |
2962 | else |
2963 | gfc_clear_attr (&attr); | |
2964 | break; | |
2965 | ||
2966 | default: | |
6de9cd9a DN |
2967 | gfc_clear_attr (&attr); |
2968 | break; | |
2969 | } | |
2970 | ||
2971 | return attr; | |
2972 | } | |
2973 | ||
2974 | ||
2975 | /* Match a structure constructor. The initial symbol has already been | |
2976 | seen. */ | |
2977 | ||
fa9290d3 DK |
2978 | typedef struct gfc_structure_ctor_component |
2979 | { | |
2980 | char* name; | |
2981 | gfc_expr* val; | |
2982 | locus where; | |
2983 | struct gfc_structure_ctor_component* next; | |
2984 | } | |
2985 | gfc_structure_ctor_component; | |
2986 | ||
ece3f663 | 2987 | #define gfc_get_structure_ctor_component() XCNEW (gfc_structure_ctor_component) |
fa9290d3 DK |
2988 | |
2989 | static void | |
2990 | gfc_free_structure_ctor_component (gfc_structure_ctor_component *comp) | |
2991 | { | |
cede9502 | 2992 | free (comp->name); |
fa9290d3 | 2993 | gfc_free_expr (comp->val); |
cede9502 | 2994 | free (comp); |
fa9290d3 DK |
2995 | } |
2996 | ||
7d1f1e61 PT |
2997 | |
2998 | /* Translate the component list into the actual constructor by sorting it in | |
2999 | the order required; this also checks along the way that each and every | |
3000 | component actually has an initializer and handles default initializers | |
3001 | for components without explicit value given. */ | |
524af0d6 | 3002 | static bool |
7d1f1e61 | 3003 | build_actual_constructor (gfc_structure_ctor_component **comp_head, |
b7e75771 | 3004 | gfc_constructor_base *ctor_head, gfc_symbol *sym) |
6de9cd9a | 3005 | { |
fa9290d3 | 3006 | gfc_structure_ctor_component *comp_iter; |
7d1f1e61 PT |
3007 | gfc_component *comp; |
3008 | ||
3009 | for (comp = sym->components; comp; comp = comp->next) | |
3010 | { | |
3011 | gfc_structure_ctor_component **next_ptr; | |
3012 | gfc_expr *value = NULL; | |
3013 | ||
3014 | /* Try to find the initializer for the current component by name. */ | |
3015 | next_ptr = comp_head; | |
3016 | for (comp_iter = *comp_head; comp_iter; comp_iter = comp_iter->next) | |
3017 | { | |
3018 | if (!strcmp (comp_iter->name, comp->name)) | |
3019 | break; | |
3020 | next_ptr = &comp_iter->next; | |
3021 | } | |
3022 | ||
3023 | /* If an extension, try building the parent derived type by building | |
3024 | a value expression for the parent derived type and calling self. */ | |
3025 | if (!comp_iter && comp == sym->components && sym->attr.extension) | |
3026 | { | |
b7e75771 JD |
3027 | value = gfc_get_structure_constructor_expr (comp->ts.type, |
3028 | comp->ts.kind, | |
3029 | &gfc_current_locus); | |
7d1f1e61 | 3030 | value->ts = comp->ts; |
7d1f1e61 | 3031 | |
bf1b77dd PT |
3032 | if (!build_actual_constructor (comp_head, |
3033 | &value->value.constructor, | |
524af0d6 | 3034 | comp->ts.u.derived)) |
7d1f1e61 PT |
3035 | { |
3036 | gfc_free_expr (value); | |
524af0d6 | 3037 | return false; |
7d1f1e61 | 3038 | } |
b7e75771 JD |
3039 | |
3040 | gfc_constructor_append_expr (ctor_head, value, NULL); | |
7d1f1e61 PT |
3041 | continue; |
3042 | } | |
3043 | ||
eeb14531 PT |
3044 | /* If it was not found, apply NULL expression to set the component as |
3045 | unallocated. Then try the default initializer if there's any; | |
2b3dc0db | 3046 | otherwise, it's an error unless this is a deferred parameter. */ |
7d1f1e61 PT |
3047 | if (!comp_iter) |
3048 | { | |
eeb14531 PT |
3049 | /* F2018 7.5.10: If an allocatable component has no corresponding |
3050 | component-data-source, then that component has an allocation | |
3051 | status of unallocated.... */ | |
3052 | if (comp->attr.allocatable | |
3053 | || (comp->ts.type == BT_CLASS | |
3054 | && CLASS_DATA (comp)->attr.allocatable)) | |
7430df97 JW |
3055 | { |
3056 | if (!gfc_notify_std (GFC_STD_F2008, "No initializer for " | |
2f029c08 | 3057 | "allocatable component %qs given in the " |
9b548517 | 3058 | "structure constructor at %C", comp->name)) |
7430df97 | 3059 | return false; |
eeb14531 PT |
3060 | value = gfc_get_null_expr (&gfc_current_locus); |
3061 | } | |
3062 | /* ....(Preceeding sentence) If a component with default | |
3063 | initialization has no corresponding component-data-source, then | |
3064 | the default initialization is applied to that component. */ | |
3065 | else if (comp->initializer) | |
3066 | { | |
3067 | if (!gfc_notify_std (GFC_STD_F2003, "Structure constructor " | |
3068 | "with missing optional arguments at %C")) | |
3069 | return false; | |
3070 | value = gfc_copy_expr (comp->initializer); | |
7430df97 | 3071 | } |
eeb14531 PT |
3072 | /* Do not trap components such as the string length for deferred |
3073 | length character components. */ | |
9b548517 | 3074 | else if (!comp->attr.artificial) |
7d1f1e61 | 3075 | { |
a4d9b221 | 3076 | gfc_error ("No initializer for component %qs given in the" |
546c8974 | 3077 | " structure constructor at %C", comp->name); |
524af0d6 | 3078 | return false; |
7d1f1e61 PT |
3079 | } |
3080 | } | |
3081 | else | |
3082 | value = comp_iter->val; | |
3083 | ||
3084 | /* Add the value to the constructor chain built. */ | |
b7e75771 | 3085 | gfc_constructor_append_expr (ctor_head, value, NULL); |
7d1f1e61 PT |
3086 | |
3087 | /* Remove the entry from the component list. We don't want the expression | |
3088 | value to be free'd, so set it to NULL. */ | |
3089 | if (comp_iter) | |
3090 | { | |
3091 | *next_ptr = comp_iter->next; | |
3092 | comp_iter->val = NULL; | |
3093 | gfc_free_structure_ctor_component (comp_iter); | |
3094 | } | |
3095 | } | |
524af0d6 | 3096 | return true; |
7d1f1e61 PT |
3097 | } |
3098 | ||
c3f34952 | 3099 | |
524af0d6 | 3100 | bool |
c3f34952 TB |
3101 | gfc_convert_to_structure_constructor (gfc_expr *e, gfc_symbol *sym, gfc_expr **cexpr, |
3102 | gfc_actual_arglist **arglist, | |
3103 | bool parent) | |
7d1f1e61 | 3104 | { |
c3f34952 | 3105 | gfc_actual_arglist *actual; |
7d1f1e61 | 3106 | gfc_structure_ctor_component *comp_tail, *comp_head, *comp_iter; |
b7e75771 | 3107 | gfc_constructor_base ctor_head = NULL; |
fa9290d3 | 3108 | gfc_component *comp; /* Is set NULL when named component is first seen */ |
fa9290d3 | 3109 | const char* last_name = NULL; |
c3f34952 TB |
3110 | locus old_locus; |
3111 | gfc_expr *expr; | |
6de9cd9a | 3112 | |
c3f34952 TB |
3113 | expr = parent ? *cexpr : e; |
3114 | old_locus = gfc_current_locus; | |
3115 | if (parent) | |
3116 | ; /* gfc_current_locus = *arglist->expr ? ->where;*/ | |
3117 | else | |
3118 | gfc_current_locus = expr->where; | |
6de9cd9a | 3119 | |
c3f34952 | 3120 | comp_tail = comp_head = NULL; |
6de9cd9a | 3121 | |
52f49934 DK |
3122 | if (!parent && sym->attr.abstract) |
3123 | { | |
1fe61adf | 3124 | gfc_error ("Cannot construct ABSTRACT type %qs at %L", |
c3f34952 TB |
3125 | sym->name, &expr->where); |
3126 | goto cleanup; | |
52f49934 DK |
3127 | } |
3128 | ||
c3f34952 TB |
3129 | comp = sym->components; |
3130 | actual = parent ? *arglist : expr->value.function.actual; | |
3131 | for ( ; actual; ) | |
6de9cd9a | 3132 | { |
c3f34952 | 3133 | gfc_component *this_comp = NULL; |
6de9cd9a | 3134 | |
c3f34952 TB |
3135 | if (!comp_head) |
3136 | comp_tail = comp_head = gfc_get_structure_ctor_component (); | |
3137 | else | |
3138 | { | |
3139 | comp_tail->next = gfc_get_structure_ctor_component (); | |
3140 | comp_tail = comp_tail->next; | |
3141 | } | |
3142 | if (actual->name) | |
3143 | { | |
524af0d6 JB |
3144 | if (!gfc_notify_std (GFC_STD_F2003, "Structure" |
3145 | " constructor with named arguments at %C")) | |
c3f34952 | 3146 | goto cleanup; |
6de9cd9a | 3147 | |
c3f34952 TB |
3148 | comp_tail->name = xstrdup (actual->name); |
3149 | last_name = comp_tail->name; | |
3150 | comp = NULL; | |
3151 | } | |
3152 | else | |
3153 | { | |
3154 | /* Components without name are not allowed after the first named | |
3155 | component initializer! */ | |
9b548517 | 3156 | if (!comp || comp->attr.artificial) |
fa9290d3 | 3157 | { |
c3f34952 TB |
3158 | if (last_name) |
3159 | gfc_error ("Component initializer without name after component" | |
546c8974 | 3160 | " named %s at %L", last_name, |
c3f34952 TB |
3161 | actual->expr ? &actual->expr->where |
3162 | : &gfc_current_locus); | |
3163 | else | |
3164 | gfc_error ("Too many components in structure constructor at " | |
546c8974 DM |
3165 | "%L", actual->expr ? &actual->expr->where |
3166 | : &gfc_current_locus); | |
c3f34952 | 3167 | goto cleanup; |
fa9290d3 | 3168 | } |
fa9290d3 | 3169 | |
c3f34952 TB |
3170 | comp_tail->name = xstrdup (comp->name); |
3171 | } | |
fa9290d3 | 3172 | |
c3f34952 | 3173 | /* Find the current component in the structure definition and check |
9d1210f4 | 3174 | its access is not private. */ |
c3f34952 | 3175 | if (comp) |
f6288c24 | 3176 | this_comp = gfc_find_component (sym, comp->name, false, false, NULL); |
c3f34952 TB |
3177 | else |
3178 | { | |
3179 | this_comp = gfc_find_component (sym, (const char *)comp_tail->name, | |
f6288c24 | 3180 | false, false, NULL); |
c3f34952 TB |
3181 | comp = NULL; /* Reset needed! */ |
3182 | } | |
6de9cd9a | 3183 | |
c3f34952 TB |
3184 | /* Here we can check if a component name is given which does not |
3185 | correspond to any component of the defined structure. */ | |
3186 | if (!this_comp) | |
3187 | goto cleanup; | |
fa9290d3 | 3188 | |
04946c6b TK |
3189 | /* For a constant string constructor, make sure the length is |
3190 | correct; truncate of fill with blanks if needed. */ | |
3191 | if (this_comp->ts.type == BT_CHARACTER && !this_comp->attr.allocatable | |
3192 | && this_comp->ts.u.cl && this_comp->ts.u.cl->length | |
3193 | && this_comp->ts.u.cl->length->expr_type == EXPR_CONSTANT | |
13a7688f | 3194 | && actual->expr->ts.type == BT_CHARACTER |
04946c6b TK |
3195 | && actual->expr->expr_type == EXPR_CONSTANT) |
3196 | { | |
5dbe01a1 | 3197 | ptrdiff_t c, e1; |
04946c6b | 3198 | c = gfc_mpz_get_hwi (this_comp->ts.u.cl->length->value.integer); |
5dbe01a1 | 3199 | e1 = actual->expr->value.character.length; |
04946c6b | 3200 | |
5dbe01a1 | 3201 | if (c != e1) |
04946c6b TK |
3202 | { |
3203 | ptrdiff_t i, to; | |
3204 | gfc_char_t *dest; | |
3205 | dest = gfc_get_wide_string (c + 1); | |
3206 | ||
5dbe01a1 | 3207 | to = e1 < c ? e1 : c; |
04946c6b TK |
3208 | for (i = 0; i < to; i++) |
3209 | dest[i] = actual->expr->value.character.string[i]; | |
a5fbc2f3 | 3210 | |
5dbe01a1 | 3211 | for (i = e1; i < c; i++) |
04946c6b TK |
3212 | dest[i] = ' '; |
3213 | ||
3214 | dest[c] = '\0'; | |
3215 | free (actual->expr->value.character.string); | |
3216 | ||
3217 | actual->expr->value.character.length = c; | |
3218 | actual->expr->value.character.string = dest; | |
cf015ca2 | 3219 | |
5dbe01a1 | 3220 | if (warn_line_truncation && c < e1) |
cf015ca2 TK |
3221 | gfc_warning_now (OPT_Wcharacter_truncation, |
3222 | "CHARACTER expression will be truncated " | |
3223 | "in constructor (%ld/%ld) at %L", (long int) c, | |
5dbe01a1 | 3224 | (long int) e1, &actual->expr->where); |
04946c6b TK |
3225 | } |
3226 | } | |
3227 | ||
c3f34952 TB |
3228 | comp_tail->val = actual->expr; |
3229 | if (actual->expr != NULL) | |
3230 | comp_tail->where = actual->expr->where; | |
3231 | actual->expr = NULL; | |
fa9290d3 | 3232 | |
c3f34952 | 3233 | /* Check if this component is already given a value. */ |
bf1b77dd | 3234 | for (comp_iter = comp_head; comp_iter != comp_tail; |
c3f34952 TB |
3235 | comp_iter = comp_iter->next) |
3236 | { | |
3237 | gcc_assert (comp_iter); | |
3238 | if (!strcmp (comp_iter->name, comp_tail->name)) | |
d3a9eea2 | 3239 | { |
c4100eae | 3240 | gfc_error ("Component %qs is initialized twice in the structure" |
546c8974 | 3241 | " constructor at %L", comp_tail->name, |
c3f34952 TB |
3242 | comp_tail->val ? &comp_tail->where |
3243 | : &gfc_current_locus); | |
d3a9eea2 | 3244 | goto cleanup; |
c3f34952 TB |
3245 | } |
3246 | } | |
d3a9eea2 | 3247 | |
c3f34952 TB |
3248 | /* F2008, R457/C725, for PURE C1283. */ |
3249 | if (this_comp->attr.pointer && comp_tail->val | |
3250 | && gfc_is_coindexed (comp_tail->val)) | |
3251 | { | |
a4d9b221 | 3252 | gfc_error ("Coindexed expression to pointer component %qs in " |
546c8974 | 3253 | "structure constructor at %L", comp_tail->name, |
c3f34952 TB |
3254 | &comp_tail->where); |
3255 | goto cleanup; | |
3256 | } | |
d3a9eea2 | 3257 | |
c3f34952 TB |
3258 | /* If not explicitly a parent constructor, gather up the components |
3259 | and build one. */ | |
3260 | if (comp && comp == sym->components | |
3261 | && sym->attr.extension | |
3262 | && comp_tail->val | |
f6288c24 | 3263 | && (!gfc_bt_struct (comp_tail->val->ts.type) |
c3f34952 TB |
3264 | || |
3265 | comp_tail->val->ts.u.derived != this_comp->ts.u.derived)) | |
3266 | { | |
524af0d6 | 3267 | bool m; |
c3f34952 | 3268 | gfc_actual_arglist *arg_null = NULL; |
6de9cd9a | 3269 | |
c3f34952 TB |
3270 | actual->expr = comp_tail->val; |
3271 | comp_tail->val = NULL; | |
6de9cd9a | 3272 | |
c3f34952 TB |
3273 | m = gfc_convert_to_structure_constructor (NULL, |
3274 | comp->ts.u.derived, &comp_tail->val, | |
3275 | comp->ts.u.derived->attr.zero_comp | |
3276 | ? &arg_null : &actual, true); | |
524af0d6 | 3277 | if (!m) |
c3f34952 | 3278 | goto cleanup; |
2eae3dc7 | 3279 | |
c3f34952 TB |
3280 | if (comp->ts.u.derived->attr.zero_comp) |
3281 | { | |
3282 | comp = comp->next; | |
3283 | continue; | |
3284 | } | |
3285 | } | |
fa9290d3 | 3286 | |
c3f34952 TB |
3287 | if (comp) |
3288 | comp = comp->next; | |
3289 | if (parent && !comp) | |
3290 | break; | |
fa9290d3 | 3291 | |
792f7301 MM |
3292 | if (actual) |
3293 | actual = actual->next; | |
6de9cd9a DN |
3294 | } |
3295 | ||
524af0d6 | 3296 | if (!build_actual_constructor (&comp_head, &ctor_head, sym)) |
7d1f1e61 PT |
3297 | goto cleanup; |
3298 | ||
fa9290d3 DK |
3299 | /* No component should be left, as this should have caused an error in the |
3300 | loop constructing the component-list (name that does not correspond to any | |
3301 | component in the structure definition). */ | |
c3f34952 | 3302 | if (comp_head && sym->attr.extension) |
7d1f1e61 PT |
3303 | { |
3304 | for (comp_iter = comp_head; comp_iter; comp_iter = comp_iter->next) | |
3305 | { | |
a4d9b221 | 3306 | gfc_error ("component %qs at %L has already been set by a " |
7d1f1e61 PT |
3307 | "parent derived type constructor", comp_iter->name, |
3308 | &comp_iter->where); | |
3309 | } | |
3310 | goto cleanup; | |
3311 | } | |
c3f34952 TB |
3312 | else |
3313 | gcc_assert (!comp_head); | |
fa9290d3 | 3314 | |
c3f34952 TB |
3315 | if (parent) |
3316 | { | |
3317 | expr = gfc_get_structure_constructor_expr (BT_DERIVED, 0, &gfc_current_locus); | |
3318 | expr->ts.u.derived = sym; | |
3319 | expr->value.constructor = ctor_head; | |
3320 | *cexpr = expr; | |
3321 | } | |
3322 | else | |
3323 | { | |
3324 | expr->ts.u.derived = sym; | |
3325 | expr->ts.kind = 0; | |
3326 | expr->ts.type = BT_DERIVED; | |
3327 | expr->value.constructor = ctor_head; | |
3328 | expr->expr_type = EXPR_STRUCTURE; | |
3329 | } | |
6de9cd9a | 3330 | |
bf1b77dd | 3331 | gfc_current_locus = old_locus; |
c3f34952 TB |
3332 | if (parent) |
3333 | *arglist = actual; | |
524af0d6 | 3334 | return true; |
6de9cd9a | 3335 | |
c3f34952 | 3336 | cleanup: |
bf1b77dd | 3337 | gfc_current_locus = old_locus; |
6de9cd9a | 3338 | |
fa9290d3 DK |
3339 | for (comp_iter = comp_head; comp_iter; ) |
3340 | { | |
3341 | gfc_structure_ctor_component *next = comp_iter->next; | |
3342 | gfc_free_structure_ctor_component (comp_iter); | |
3343 | comp_iter = next; | |
3344 | } | |
b7e75771 | 3345 | gfc_constructor_free (ctor_head); |
c3f34952 | 3346 | |
524af0d6 | 3347 | return false; |
c3f34952 TB |
3348 | } |
3349 | ||
3350 | ||
3351 | match | |
3352 | gfc_match_structure_constructor (gfc_symbol *sym, gfc_expr **result) | |
3353 | { | |
3354 | match m; | |
3355 | gfc_expr *e; | |
3356 | gfc_symtree *symtree; | |
3357 | ||
b64c3d06 | 3358 | gfc_get_ha_sym_tree (sym->name, &symtree); |
c3f34952 TB |
3359 | |
3360 | e = gfc_get_expr (); | |
3361 | e->symtree = symtree; | |
3362 | e->expr_type = EXPR_FUNCTION; | |
2f00fb3d | 3363 | e->where = gfc_current_locus; |
c3f34952 | 3364 | |
f6288c24 | 3365 | gcc_assert (gfc_fl_struct (sym->attr.flavor) |
c3f34952 TB |
3366 | && symtree->n.sym->attr.flavor == FL_PROCEDURE); |
3367 | e->value.function.esym = sym; | |
3368 | e->symtree->n.sym->attr.generic = 1; | |
3369 | ||
49032565 SK |
3370 | m = gfc_match_actual_arglist (0, &e->value.function.actual); |
3371 | if (m != MATCH_YES) | |
3372 | { | |
3373 | gfc_free_expr (e); | |
3374 | return m; | |
3375 | } | |
3376 | ||
3377 | if (!gfc_convert_to_structure_constructor (e, sym, NULL, NULL, false)) | |
3378 | { | |
3379 | gfc_free_expr (e); | |
3380 | return MATCH_ERROR; | |
3381 | } | |
3382 | ||
586dc38b SK |
3383 | /* If a structure constructor is in a DATA statement, then each entity |
3384 | in the structure constructor must be a constant. Try to reduce the | |
3385 | expression here. */ | |
3386 | if (gfc_in_match_data ()) | |
3387 | gfc_reduce_init_expr (e); | |
5bab4c96 | 3388 | |
49032565 SK |
3389 | *result = e; |
3390 | return MATCH_YES; | |
6de9cd9a DN |
3391 | } |
3392 | ||
3393 | ||
9a3db5a3 PT |
3394 | /* If the symbol is an implicit do loop index and implicitly typed, |
3395 | it should not be host associated. Provide a symtree from the | |
3396 | current namespace. */ | |
3397 | static match | |
3398 | check_for_implicit_index (gfc_symtree **st, gfc_symbol **sym) | |
3399 | { | |
3400 | if ((*sym)->attr.flavor == FL_VARIABLE | |
3401 | && (*sym)->ns != gfc_current_ns | |
3402 | && (*sym)->attr.implied_index | |
3403 | && (*sym)->attr.implicit_type | |
3404 | && !(*sym)->attr.use_assoc) | |
3405 | { | |
3406 | int i; | |
08a6b8e0 | 3407 | i = gfc_get_sym_tree ((*sym)->name, NULL, st, false); |
9a3db5a3 PT |
3408 | if (i) |
3409 | return MATCH_ERROR; | |
3410 | *sym = (*st)->n.sym; | |
3411 | } | |
3412 | return MATCH_YES; | |
3413 | } | |
3414 | ||
3415 | ||
3070bab4 JW |
3416 | /* Procedure pointer as function result: Replace the function symbol by the |
3417 | auto-generated hidden result variable named "ppr@". */ | |
3418 | ||
524af0d6 | 3419 | static bool |
3070bab4 JW |
3420 | replace_hidden_procptr_result (gfc_symbol **sym, gfc_symtree **st) |
3421 | { | |
3422 | /* Check for procedure pointer result variable. */ | |
3423 | if ((*sym)->attr.function && !(*sym)->attr.external | |
3424 | && (*sym)->result && (*sym)->result != *sym | |
3425 | && (*sym)->result->attr.proc_pointer | |
3426 | && (*sym) == gfc_current_ns->proc_name | |
3427 | && (*sym) == (*sym)->result->ns->proc_name | |
3428 | && strcmp ("ppr@", (*sym)->result->name) == 0) | |
3429 | { | |
3430 | /* Automatic replacement with "hidden" result variable. */ | |
3431 | (*sym)->result->attr.referenced = (*sym)->attr.referenced; | |
3432 | *sym = (*sym)->result; | |
3433 | *st = gfc_find_symtree ((*sym)->ns->sym_root, (*sym)->name); | |
524af0d6 | 3434 | return true; |
3070bab4 | 3435 | } |
524af0d6 | 3436 | return false; |
3070bab4 JW |
3437 | } |
3438 | ||
3439 | ||
6de9cd9a DN |
3440 | /* Matches a variable name followed by anything that might follow it-- |
3441 | array reference, argument list of a function, etc. */ | |
3442 | ||
3443 | match | |
edf1eac2 | 3444 | gfc_match_rvalue (gfc_expr **result) |
6de9cd9a DN |
3445 | { |
3446 | gfc_actual_arglist *actual_arglist; | |
d3fcc995 | 3447 | char name[GFC_MAX_SYMBOL_LEN + 1], argname[GFC_MAX_SYMBOL_LEN + 1]; |
6de9cd9a DN |
3448 | gfc_state_data *st; |
3449 | gfc_symbol *sym; | |
3450 | gfc_symtree *symtree; | |
d3fcc995 | 3451 | locus where, old_loc; |
6de9cd9a | 3452 | gfc_expr *e; |
d3fcc995 | 3453 | match m, m2; |
6de9cd9a | 3454 | int i; |
5270c302 AL |
3455 | gfc_typespec *ts; |
3456 | bool implicit_char; | |
a99288e5 | 3457 | gfc_ref *ref; |
6de9cd9a | 3458 | |
cd714e1e FR |
3459 | m = gfc_match ("%%loc"); |
3460 | if (m == MATCH_YES) | |
3461 | { | |
3462 | if (!gfc_notify_std (GFC_STD_LEGACY, "%%LOC() as an rvalue at %C")) | |
3463 | return MATCH_ERROR; | |
3464 | strncpy (name, "loc", 4); | |
3465 | } | |
3466 | ||
3467 | else | |
3468 | { | |
3469 | m = gfc_match_name (name); | |
3470 | if (m != MATCH_YES) | |
3471 | return m; | |
3472 | } | |
6de9cd9a | 3473 | |
f6288c24 FR |
3474 | /* Check if the symbol exists. */ |
3475 | if (gfc_find_sym_tree (name, NULL, 1, &symtree)) | |
6de9cd9a DN |
3476 | return MATCH_ERROR; |
3477 | ||
f6288c24 FR |
3478 | /* If the symbol doesn't exist, create it unless the name matches a FL_STRUCT |
3479 | type. For derived types we create a generic symbol which links to the | |
3480 | derived type symbol; STRUCTUREs are simpler and must not conflict with | |
3481 | variables. */ | |
3482 | if (!symtree) | |
3483 | if (gfc_find_sym_tree (gfc_dt_upper_string (name), NULL, 1, &symtree)) | |
3484 | return MATCH_ERROR; | |
3485 | if (!symtree || symtree->n.sym->attr.flavor != FL_STRUCT) | |
3486 | { | |
3487 | if (gfc_find_state (COMP_INTERFACE) | |
3488 | && !gfc_current_ns->has_import_set) | |
3489 | i = gfc_get_sym_tree (name, NULL, &symtree, false); | |
3490 | else | |
3491 | i = gfc_get_ha_sym_tree (name, &symtree); | |
3492 | if (i) | |
3493 | return MATCH_ERROR; | |
3494 | } | |
3495 | ||
3496 | ||
6de9cd9a DN |
3497 | sym = symtree->n.sym; |
3498 | e = NULL; | |
63645982 | 3499 | where = gfc_current_locus; |
6de9cd9a | 3500 | |
3070bab4 JW |
3501 | replace_hidden_procptr_result (&sym, &symtree); |
3502 | ||
9a3db5a3 PT |
3503 | /* If this is an implicit do loop index and implicitly typed, |
3504 | it should not be host associated. */ | |
3505 | m = check_for_implicit_index (&symtree, &sym); | |
3506 | if (m != MATCH_YES) | |
3507 | return m; | |
3508 | ||
6de9cd9a | 3509 | gfc_set_sym_referenced (sym); |
9a3db5a3 | 3510 | sym->attr.implied_index = 0; |
6de9cd9a | 3511 | |
0921bc44 JJ |
3512 | if (sym->attr.function && sym->result == sym) |
3513 | { | |
811849c0 PT |
3514 | /* See if this is a directly recursive function call. */ |
3515 | gfc_gobble_whitespace (); | |
3516 | if (sym->attr.recursive | |
8fc541d3 | 3517 | && gfc_peek_ascii_char () == '(' |
fc2d8680 PT |
3518 | && gfc_current_ns->proc_name == sym |
3519 | && !sym->attr.dimension) | |
811849c0 | 3520 | { |
a4d9b221 | 3521 | gfc_error ("%qs at %C is the name of a recursive function " |
fc2d8680 PT |
3522 | "and so refers to the result variable. Use an " |
3523 | "explicit RESULT variable for direct recursion " | |
3524 | "(12.5.2.1)", sym->name); | |
811849c0 PT |
3525 | return MATCH_ERROR; |
3526 | } | |
fc2d8680 | 3527 | |
2d71b918 | 3528 | if (gfc_is_function_return_value (sym, gfc_current_ns)) |
0921bc44 JJ |
3529 | goto variable; |
3530 | ||
3531 | if (sym->attr.entry | |
3532 | && (sym->ns == gfc_current_ns | |
3533 | || sym->ns == gfc_current_ns->parent)) | |
3534 | { | |
3535 | gfc_entry_list *el = NULL; | |
bf1b77dd | 3536 | |
0921bc44 JJ |
3537 | for (el = sym->ns->entries; el; el = el->next) |
3538 | if (sym == el->sym) | |
3539 | goto variable; | |
3540 | } | |
3541 | } | |
6de9cd9a | 3542 | |
8fb74da4 | 3543 | if (gfc_matching_procptr_assignment) |
4d124378 TB |
3544 | { |
3545 | /* It can be a procedure or a derived-type procedure or a not-yet-known | |
3546 | type. */ | |
3547 | if (sym->attr.flavor != FL_UNKNOWN | |
3548 | && sym->attr.flavor != FL_PROCEDURE | |
3549 | && sym->attr.flavor != FL_PARAMETER | |
3550 | && sym->attr.flavor != FL_VARIABLE) | |
3551 | { | |
3552 | gfc_error ("Symbol at %C is not appropriate for an expression"); | |
3553 | return MATCH_ERROR; | |
3554 | } | |
3555 | goto procptr0; | |
3556 | } | |
8fb74da4 | 3557 | |
6de9cd9a DN |
3558 | if (sym->attr.function || sym->attr.external || sym->attr.intrinsic) |
3559 | goto function0; | |
3560 | ||
3561 | if (sym->attr.generic) | |
3562 | goto generic_function; | |
3563 | ||
3564 | switch (sym->attr.flavor) | |
3565 | { | |
3566 | case FL_VARIABLE: | |
3567 | variable: | |
6de9cd9a DN |
3568 | e = gfc_get_expr (); |
3569 | ||
3570 | e->expr_type = EXPR_VARIABLE; | |
3571 | e->symtree = symtree; | |
3572 | ||
713485cc | 3573 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3574 | break; |
3575 | ||
3576 | case FL_PARAMETER: | |
b7263e8f | 3577 | /* A statement of the form "REAL, parameter :: a(0:10) = 1" will |
bf1b77dd | 3578 | end up here. Unfortunately, sym->value->expr_type is set to |
b7263e8f EE |
3579 | EXPR_CONSTANT, and so the if () branch would be followed without |
3580 | the !sym->as check. */ | |
3581 | if (sym->value && sym->value->expr_type != EXPR_ARRAY && !sym->as) | |
6de9cd9a DN |
3582 | e = gfc_copy_expr (sym->value); |
3583 | else | |
3584 | { | |
3585 | e = gfc_get_expr (); | |
3586 | e->expr_type = EXPR_VARIABLE; | |
3587 | } | |
3588 | ||
3589 | e->symtree = symtree; | |
713485cc | 3590 | m = gfc_match_varspec (e, 0, false, true); |
a99288e5 PT |
3591 | |
3592 | if (sym->ts.is_c_interop || sym->ts.is_iso_c) | |
3593 | break; | |
3594 | ||
927171bf PT |
3595 | /* Variable array references to derived type parameters cause |
3596 | all sorts of headaches in simplification. Treating such | |
3597 | expressions as variable works just fine for all array | |
3598 | references. */ | |
3599 | if (sym->value && sym->ts.type == BT_DERIVED && e->ref) | |
a99288e5 PT |
3600 | { |
3601 | for (ref = e->ref; ref; ref = ref->next) | |
3602 | if (ref->type == REF_ARRAY) | |
3603 | break; | |
3604 | ||
927171bf | 3605 | if (ref == NULL || ref->u.ar.type == AR_FULL) |
a99288e5 PT |
3606 | break; |
3607 | ||
3608 | ref = e->ref; | |
3609 | e->ref = NULL; | |
3610 | gfc_free_expr (e); | |
3611 | e = gfc_get_expr (); | |
3612 | e->expr_type = EXPR_VARIABLE; | |
3613 | e->symtree = symtree; | |
3614 | e->ref = ref; | |
a99288e5 PT |
3615 | } |
3616 | ||
6de9cd9a DN |
3617 | break; |
3618 | ||
f6288c24 | 3619 | case FL_STRUCT: |
6de9cd9a DN |
3620 | case FL_DERIVED: |
3621 | sym = gfc_use_derived (sym); | |
3622 | if (sym == NULL) | |
3623 | m = MATCH_ERROR; | |
3624 | else | |
c3f34952 | 3625 | goto generic_function; |
6de9cd9a DN |
3626 | break; |
3627 | ||
3628 | /* If we're here, then the name is known to be the name of a | |
3629 | procedure, yet it is not sure to be the name of a function. */ | |
3630 | case FL_PROCEDURE: | |
8fb74da4 | 3631 | |
1cc0e193 | 3632 | /* Procedure Pointer Assignments. */ |
8fb74da4 JW |
3633 | procptr0: |
3634 | if (gfc_matching_procptr_assignment) | |
3635 | { | |
3636 | gfc_gobble_whitespace (); | |
e35bbb23 | 3637 | if (!sym->attr.dimension && gfc_peek_ascii_char () == '(') |
8fb74da4 JW |
3638 | /* Parse functions returning a procptr. */ |
3639 | goto function0; | |
3640 | ||
8fb74da4 JW |
3641 | e = gfc_get_expr (); |
3642 | e->expr_type = EXPR_VARIABLE; | |
3643 | e->symtree = symtree; | |
713485cc | 3644 | m = gfc_match_varspec (e, 0, false, true); |
2dda89a8 JW |
3645 | if (!e->ref && sym->attr.flavor == FL_UNKNOWN |
3646 | && sym->ts.type == BT_UNKNOWN | |
524af0d6 | 3647 | && !gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL)) |
2dda89a8 JW |
3648 | { |
3649 | m = MATCH_ERROR; | |
3650 | break; | |
3651 | } | |
8fb74da4 JW |
3652 | break; |
3653 | } | |
3654 | ||
6de9cd9a DN |
3655 | if (sym->attr.subroutine) |
3656 | { | |
a4d9b221 | 3657 | gfc_error ("Unexpected use of subroutine name %qs at %C", |
6de9cd9a DN |
3658 | sym->name); |
3659 | m = MATCH_ERROR; | |
3660 | break; | |
3661 | } | |
3662 | ||
3663 | /* At this point, the name has to be a non-statement function. | |
edf1eac2 SK |
3664 | If the name is the same as the current function being |
3665 | compiled, then we have a variable reference (to the function | |
3666 | result) if the name is non-recursive. */ | |
6de9cd9a DN |
3667 | |
3668 | st = gfc_enclosing_unit (NULL); | |
3669 | ||
4668d6f9 PT |
3670 | if (st != NULL |
3671 | && st->state == COMP_FUNCTION | |
6de9cd9a DN |
3672 | && st->sym == sym |
3673 | && !sym->attr.recursive) | |
3674 | { | |
3675 | e = gfc_get_expr (); | |
3676 | e->symtree = symtree; | |
3677 | e->expr_type = EXPR_VARIABLE; | |
3678 | ||
713485cc | 3679 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3680 | break; |
3681 | } | |
3682 | ||
3683 | /* Match a function reference. */ | |
3684 | function0: | |
3685 | m = gfc_match_actual_arglist (0, &actual_arglist); | |
3686 | if (m == MATCH_NO) | |
3687 | { | |
3688 | if (sym->attr.proc == PROC_ST_FUNCTION) | |
a4d9b221 | 3689 | gfc_error ("Statement function %qs requires argument list at %C", |
6de9cd9a DN |
3690 | sym->name); |
3691 | else | |
a4d9b221 | 3692 | gfc_error ("Function %qs requires an argument list at %C", |
6de9cd9a DN |
3693 | sym->name); |
3694 | ||
3695 | m = MATCH_ERROR; | |
3696 | break; | |
3697 | } | |
3698 | ||
3699 | if (m != MATCH_YES) | |
3700 | { | |
3701 | m = MATCH_ERROR; | |
3702 | break; | |
3703 | } | |
3704 | ||
3705 | gfc_get_ha_sym_tree (name, &symtree); /* Can't fail */ | |
3706 | sym = symtree->n.sym; | |
3707 | ||
3070bab4 JW |
3708 | replace_hidden_procptr_result (&sym, &symtree); |
3709 | ||
6de9cd9a DN |
3710 | e = gfc_get_expr (); |
3711 | e->symtree = symtree; | |
3712 | e->expr_type = EXPR_FUNCTION; | |
3713 | e->value.function.actual = actual_arglist; | |
63645982 | 3714 | e->where = gfc_current_locus; |
6de9cd9a | 3715 | |
102344e2 TB |
3716 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok |
3717 | && CLASS_DATA (sym)->as) | |
3718 | e->rank = CLASS_DATA (sym)->as->rank; | |
3719 | else if (sym->as != NULL) | |
6de9cd9a DN |
3720 | e->rank = sym->as->rank; |
3721 | ||
3722 | if (!sym->attr.function | |
524af0d6 | 3723 | && !gfc_add_function (&sym->attr, sym->name, NULL)) |
6de9cd9a DN |
3724 | { |
3725 | m = MATCH_ERROR; | |
3726 | break; | |
3727 | } | |
3728 | ||
a8b3b0b6 CR |
3729 | /* Check here for the existence of at least one argument for the |
3730 | iso_c_binding functions C_LOC, C_FUNLOC, and C_ASSOCIATED. The | |
3731 | argument(s) given will be checked in gfc_iso_c_func_interface, | |
3732 | during resolution of the function call. */ | |
3733 | if (sym->attr.is_iso_c == 1 | |
3734 | && (sym->from_intmod == INTMOD_ISO_C_BINDING | |
3735 | && (sym->intmod_sym_id == ISOCBINDING_LOC | |
3736 | || sym->intmod_sym_id == ISOCBINDING_FUNLOC | |
3737 | || sym->intmod_sym_id == ISOCBINDING_ASSOCIATED))) | |
3738 | { | |
3739 | /* make sure we were given a param */ | |
3740 | if (actual_arglist == NULL) | |
3741 | { | |
a4d9b221 | 3742 | gfc_error ("Missing argument to %qs at %C", sym->name); |
a8b3b0b6 CR |
3743 | m = MATCH_ERROR; |
3744 | break; | |
3745 | } | |
3746 | } | |
3747 | ||
6de9cd9a DN |
3748 | if (sym->result == NULL) |
3749 | sym->result = sym; | |
3750 | ||
20fee4a9 JW |
3751 | gfc_gobble_whitespace (); |
3752 | /* F08:C612. */ | |
3753 | if (gfc_peek_ascii_char() == '%') | |
3754 | { | |
67914693 | 3755 | gfc_error ("The leftmost part-ref in a data-ref cannot be a " |
20fee4a9 JW |
3756 | "function reference at %C"); |
3757 | m = MATCH_ERROR; | |
52354dad | 3758 | break; |
20fee4a9 JW |
3759 | } |
3760 | ||
6de9cd9a DN |
3761 | m = MATCH_YES; |
3762 | break; | |
3763 | ||
3764 | case FL_UNKNOWN: | |
3765 | ||
3766 | /* Special case for derived type variables that get their types | |
edf1eac2 SK |
3767 | via an IMPLICIT statement. This can't wait for the |
3768 | resolution phase. */ | |
6de9cd9a | 3769 | |
f6288c24 FR |
3770 | old_loc = gfc_current_locus; |
3771 | if (gfc_match_member_sep (sym) == MATCH_YES | |
0dd973dd | 3772 | && sym->ts.type == BT_UNKNOWN |
713485cc | 3773 | && gfc_get_default_type (sym->name, sym->ns)->type == BT_DERIVED) |
6de9cd9a | 3774 | gfc_set_default_type (sym, 0, sym->ns); |
f6288c24 | 3775 | gfc_current_locus = old_loc; |
6de9cd9a | 3776 | |
492792ed | 3777 | /* If the symbol has a (co)dimension attribute, the expression is a |
edf1eac2 | 3778 | variable. */ |
6de9cd9a | 3779 | |
492792ed | 3780 | if (sym->attr.dimension || sym->attr.codimension) |
6de9cd9a | 3781 | { |
524af0d6 | 3782 | if (!gfc_add_flavor (&sym->attr, FL_VARIABLE, sym->name, NULL)) |
6de9cd9a DN |
3783 | { |
3784 | m = MATCH_ERROR; | |
3785 | break; | |
3786 | } | |
3787 | ||
3788 | e = gfc_get_expr (); | |
3789 | e->symtree = symtree; | |
3790 | e->expr_type = EXPR_VARIABLE; | |
713485cc | 3791 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3792 | break; |
3793 | } | |
3794 | ||
cd99c23c | 3795 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok |
492792ed TB |
3796 | && (CLASS_DATA (sym)->attr.dimension |
3797 | || CLASS_DATA (sym)->attr.codimension)) | |
c49ea23d | 3798 | { |
524af0d6 | 3799 | if (!gfc_add_flavor (&sym->attr, FL_VARIABLE, sym->name, NULL)) |
c49ea23d PT |
3800 | { |
3801 | m = MATCH_ERROR; | |
3802 | break; | |
3803 | } | |
3804 | ||
3805 | e = gfc_get_expr (); | |
3806 | e->symtree = symtree; | |
3807 | e->expr_type = EXPR_VARIABLE; | |
3808 | m = gfc_match_varspec (e, 0, false, true); | |
3809 | break; | |
3810 | } | |
3811 | ||
6de9cd9a | 3812 | /* Name is not an array, so we peek to see if a '(' implies a |
edf1eac2 SK |
3813 | function call or a substring reference. Otherwise the |
3814 | variable is just a scalar. */ | |
6de9cd9a DN |
3815 | |
3816 | gfc_gobble_whitespace (); | |
8fc541d3 | 3817 | if (gfc_peek_ascii_char () != '(') |
6de9cd9a DN |
3818 | { |
3819 | /* Assume a scalar variable */ | |
3820 | e = gfc_get_expr (); | |
3821 | e->symtree = symtree; | |
3822 | e->expr_type = EXPR_VARIABLE; | |
3823 | ||
524af0d6 | 3824 | if (!gfc_add_flavor (&sym->attr, FL_VARIABLE, sym->name, NULL)) |
6de9cd9a DN |
3825 | { |
3826 | m = MATCH_ERROR; | |
3827 | break; | |
3828 | } | |
3829 | ||
8e1f752a | 3830 | /*FIXME:??? gfc_match_varspec does set this for us: */ |
6de9cd9a | 3831 | e->ts = sym->ts; |
713485cc | 3832 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3833 | break; |
3834 | } | |
3835 | ||
d3fcc995 TS |
3836 | /* See if this is a function reference with a keyword argument |
3837 | as first argument. We do this because otherwise a spurious | |
3838 | symbol would end up in the symbol table. */ | |
3839 | ||
3840 | old_loc = gfc_current_locus; | |
3841 | m2 = gfc_match (" ( %n =", argname); | |
3842 | gfc_current_locus = old_loc; | |
6de9cd9a DN |
3843 | |
3844 | e = gfc_get_expr (); | |
3845 | e->symtree = symtree; | |
3846 | ||
d3fcc995 | 3847 | if (m2 != MATCH_YES) |
6de9cd9a | 3848 | { |
5270c302 | 3849 | /* Try to figure out whether we're dealing with a character type. |
bf1b77dd | 3850 | We're peeking ahead here, because we don't want to call |
5270c302 AL |
3851 | match_substring if we're dealing with an implicitly typed |
3852 | non-character variable. */ | |
3853 | implicit_char = false; | |
3854 | if (sym->ts.type == BT_UNKNOWN) | |
3855 | { | |
713485cc | 3856 | ts = gfc_get_default_type (sym->name, NULL); |
5270c302 AL |
3857 | if (ts->type == BT_CHARACTER) |
3858 | implicit_char = true; | |
3859 | } | |
3860 | ||
d3fcc995 TS |
3861 | /* See if this could possibly be a substring reference of a name |
3862 | that we're not sure is a variable yet. */ | |
6de9cd9a | 3863 | |
5270c302 | 3864 | if ((implicit_char || sym->ts.type == BT_CHARACTER) |
38217d3e | 3865 | && match_substring (sym->ts.u.cl, 0, &e->ref, false) == MATCH_YES) |
6de9cd9a | 3866 | { |
6de9cd9a | 3867 | |
d3fcc995 TS |
3868 | e->expr_type = EXPR_VARIABLE; |
3869 | ||
3870 | if (sym->attr.flavor != FL_VARIABLE | |
bf1b77dd | 3871 | && !gfc_add_flavor (&sym->attr, FL_VARIABLE, |
524af0d6 | 3872 | sym->name, NULL)) |
d3fcc995 TS |
3873 | { |
3874 | m = MATCH_ERROR; | |
3875 | break; | |
3876 | } | |
3877 | ||
3878 | if (sym->ts.type == BT_UNKNOWN | |
524af0d6 | 3879 | && !gfc_set_default_type (sym, 1, NULL)) |
d3fcc995 TS |
3880 | { |
3881 | m = MATCH_ERROR; | |
3882 | break; | |
3883 | } | |
3884 | ||
3885 | e->ts = sym->ts; | |
860c8f3b | 3886 | if (e->ref) |
bc21d315 | 3887 | e->ts.u.cl = NULL; |
d3fcc995 | 3888 | m = MATCH_YES; |
6de9cd9a DN |
3889 | break; |
3890 | } | |
6de9cd9a DN |
3891 | } |
3892 | ||
3893 | /* Give up, assume we have a function. */ | |
3894 | ||
08a6b8e0 | 3895 | gfc_get_sym_tree (name, NULL, &symtree, false); /* Can't fail */ |
6de9cd9a DN |
3896 | sym = symtree->n.sym; |
3897 | e->expr_type = EXPR_FUNCTION; | |
3898 | ||
3899 | if (!sym->attr.function | |
524af0d6 | 3900 | && !gfc_add_function (&sym->attr, sym->name, NULL)) |
6de9cd9a DN |
3901 | { |
3902 | m = MATCH_ERROR; | |
3903 | break; | |
3904 | } | |
3905 | ||
3906 | sym->result = sym; | |
3907 | ||
3908 | m = gfc_match_actual_arglist (0, &e->value.function.actual); | |
3909 | if (m == MATCH_NO) | |
a4d9b221 | 3910 | gfc_error ("Missing argument list in function %qs at %C", sym->name); |
6de9cd9a DN |
3911 | |
3912 | if (m != MATCH_YES) | |
3913 | { | |
3914 | m = MATCH_ERROR; | |
3915 | break; | |
3916 | } | |
3917 | ||
3918 | /* If our new function returns a character, array or structure | |
edf1eac2 | 3919 | type, it might have subsequent references. */ |
6de9cd9a | 3920 | |
713485cc | 3921 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3922 | if (m == MATCH_NO) |
3923 | m = MATCH_YES; | |
3924 | ||
3925 | break; | |
3926 | ||
3927 | generic_function: | |
f6288c24 FR |
3928 | /* Look for symbol first; if not found, look for STRUCTURE type symbol |
3929 | specially. Creates a generic symbol for derived types. */ | |
3930 | gfc_find_sym_tree (name, NULL, 1, &symtree); | |
3931 | if (!symtree) | |
3932 | gfc_find_sym_tree (gfc_dt_upper_string (name), NULL, 1, &symtree); | |
3933 | if (!symtree || symtree->n.sym->attr.flavor != FL_STRUCT) | |
3934 | gfc_get_sym_tree (name, NULL, &symtree, false); /* Can't fail */ | |
6de9cd9a DN |
3935 | |
3936 | e = gfc_get_expr (); | |
3937 | e->symtree = symtree; | |
3938 | e->expr_type = EXPR_FUNCTION; | |
3939 | ||
f6288c24 | 3940 | if (gfc_fl_struct (sym->attr.flavor)) |
c3f34952 TB |
3941 | { |
3942 | e->value.function.esym = sym; | |
3943 | e->symtree->n.sym->attr.generic = 1; | |
3944 | } | |
3945 | ||
6de9cd9a DN |
3946 | m = gfc_match_actual_arglist (0, &e->value.function.actual); |
3947 | break; | |
3948 | ||
c0f0e35a JD |
3949 | case FL_NAMELIST: |
3950 | m = MATCH_ERROR; | |
3951 | break; | |
3952 | ||
6de9cd9a DN |
3953 | default: |
3954 | gfc_error ("Symbol at %C is not appropriate for an expression"); | |
3955 | return MATCH_ERROR; | |
3956 | } | |
3957 | ||
3958 | if (m == MATCH_YES) | |
3959 | { | |
3960 | e->where = where; | |
3961 | *result = e; | |
3962 | } | |
3963 | else | |
3964 | gfc_free_expr (e); | |
3965 | ||
3966 | return m; | |
3967 | } | |
3968 | ||
3969 | ||
df2fba9e | 3970 | /* Match a variable, i.e. something that can be assigned to. This |
6de9cd9a DN |
3971 | starts as a symbol, can be a structure component or an array |
3972 | reference. It can be a function if the function doesn't have a | |
3973 | separate RESULT variable. If the symbol has not been previously | |
30aabb86 | 3974 | seen, we assume it is a variable. |
6de9cd9a | 3975 | |
30aabb86 PT |
3976 | This function is called by two interface functions: |
3977 | gfc_match_variable, which has host_flag = 1, and | |
3978 | gfc_match_equiv_variable, with host_flag = 0, to restrict the | |
3979 | match of the symbol to the local scope. */ | |
3980 | ||
3981 | static match | |
edf1eac2 | 3982 | match_variable (gfc_expr **result, int equiv_flag, int host_flag) |
6de9cd9a | 3983 | { |
f6288c24 | 3984 | gfc_symbol *sym, *dt_sym; |
6de9cd9a DN |
3985 | gfc_symtree *st; |
3986 | gfc_expr *expr; | |
f6288c24 | 3987 | locus where, old_loc; |
6de9cd9a DN |
3988 | match m; |
3989 | ||
fd2aa7ad PT |
3990 | /* Since nothing has any business being an lvalue in a module |
3991 | specification block, an interface block or a contains section, | |
3992 | we force the changed_symbols mechanism to work by setting | |
3993 | host_flag to 0. This prevents valid symbols that have the name | |
3994 | of keywords, such as 'end', being turned into variables by | |
df2fba9e | 3995 | failed matching to assignments for, e.g., END INTERFACE. */ |
fd2aa7ad | 3996 | if (gfc_current_state () == COMP_MODULE |
4668d6f9 | 3997 | || gfc_current_state () == COMP_SUBMODULE |
fd2aa7ad PT |
3998 | || gfc_current_state () == COMP_INTERFACE |
3999 | || gfc_current_state () == COMP_CONTAINS) | |
4000 | host_flag = 0; | |
4001 | ||
618f4f46 | 4002 | where = gfc_current_locus; |
30aabb86 | 4003 | m = gfc_match_sym_tree (&st, host_flag); |
6de9cd9a DN |
4004 | if (m != MATCH_YES) |
4005 | return m; | |
6de9cd9a DN |
4006 | |
4007 | sym = st->n.sym; | |
9a3db5a3 PT |
4008 | |
4009 | /* If this is an implicit do loop index and implicitly typed, | |
4010 | it should not be host associated. */ | |
4011 | m = check_for_implicit_index (&st, &sym); | |
4012 | if (m != MATCH_YES) | |
4013 | return m; | |
4014 | ||
4015 | sym->attr.implied_index = 0; | |
4016 | ||
6de9cd9a | 4017 | gfc_set_sym_referenced (sym); |
f6288c24 FR |
4018 | |
4019 | /* STRUCTUREs may share names with variables, but derived types may not. */ | |
4020 | if (sym->attr.flavor == FL_PROCEDURE && sym->generic | |
4021 | && (dt_sym = gfc_find_dt_in_generic (sym))) | |
4022 | { | |
4023 | if (dt_sym->attr.flavor == FL_DERIVED) | |
2f029c08 | 4024 | gfc_error ("Derived type %qs cannot be used as a variable at %C", |
f6288c24 FR |
4025 | sym->name); |
4026 | return MATCH_ERROR; | |
4027 | } | |
4028 | ||
6de9cd9a DN |
4029 | switch (sym->attr.flavor) |
4030 | { | |
4031 | case FL_VARIABLE: | |
8c91ab34 | 4032 | /* Everything is alright. */ |
6de9cd9a DN |
4033 | break; |
4034 | ||
4035 | case FL_UNKNOWN: | |
d7e2fcd0 TB |
4036 | { |
4037 | sym_flavor flavor = FL_UNKNOWN; | |
4038 | ||
4039 | gfc_gobble_whitespace (); | |
4040 | ||
4041 | if (sym->attr.external || sym->attr.procedure | |
4042 | || sym->attr.function || sym->attr.subroutine) | |
4043 | flavor = FL_PROCEDURE; | |
b9332b09 PT |
4044 | |
4045 | /* If it is not a procedure, is not typed and is host associated, | |
4046 | we cannot give it a flavor yet. */ | |
4047 | else if (sym->ns == gfc_current_ns->parent | |
4048 | && sym->ts.type == BT_UNKNOWN) | |
4049 | break; | |
4050 | ||
4051 | /* These are definitive indicators that this is a variable. */ | |
8fc541d3 | 4052 | else if (gfc_peek_ascii_char () != '(' || sym->ts.type != BT_UNKNOWN |
d7e2fcd0 TB |
4053 | || sym->attr.pointer || sym->as != NULL) |
4054 | flavor = FL_VARIABLE; | |
4055 | ||
4056 | if (flavor != FL_UNKNOWN | |
524af0d6 | 4057 | && !gfc_add_flavor (&sym->attr, flavor, sym->name, NULL)) |
d7e2fcd0 TB |
4058 | return MATCH_ERROR; |
4059 | } | |
6de9cd9a DN |
4060 | break; |
4061 | ||
5056a350 SK |
4062 | case FL_PARAMETER: |
4063 | if (equiv_flag) | |
8c91ab34 DK |
4064 | { |
4065 | gfc_error ("Named constant at %C in an EQUIVALENCE"); | |
4066 | return MATCH_ERROR; | |
4067 | } | |
4068 | /* Otherwise this is checked for and an error given in the | |
4069 | variable definition context checks. */ | |
5056a350 SK |
4070 | break; |
4071 | ||
6de9cd9a | 4072 | case FL_PROCEDURE: |
01d2a7d7 DF |
4073 | /* Check for a nonrecursive function result variable. */ |
4074 | if (sym->attr.function | |
8c91ab34 DK |
4075 | && !sym->attr.external |
4076 | && sym->result == sym | |
4077 | && (gfc_is_function_return_value (sym, gfc_current_ns) | |
4078 | || (sym->attr.entry | |
4079 | && sym->ns == gfc_current_ns) | |
4080 | || (sym->attr.entry | |
4081 | && sym->ns == gfc_current_ns->parent))) | |
6de9cd9a | 4082 | { |
6de9cd9a DN |
4083 | /* If a function result is a derived type, then the derived |
4084 | type may still have to be resolved. */ | |
4085 | ||
4086 | if (sym->ts.type == BT_DERIVED | |
bc21d315 | 4087 | && gfc_use_derived (sym->ts.u.derived) == NULL) |
6de9cd9a | 4088 | return MATCH_ERROR; |
6de9cd9a DN |
4089 | break; |
4090 | } | |
4091 | ||
3070bab4 | 4092 | if (sym->attr.proc_pointer |
524af0d6 | 4093 | || replace_hidden_procptr_result (&sym, &st)) |
8fb74da4 JW |
4094 | break; |
4095 | ||
6de9cd9a | 4096 | /* Fall through to error */ |
81fea426 | 4097 | gcc_fallthrough (); |
6de9cd9a DN |
4098 | |
4099 | default: | |
a4d9b221 | 4100 | gfc_error ("%qs at %C is not a variable", sym->name); |
6de9cd9a DN |
4101 | return MATCH_ERROR; |
4102 | } | |
4103 | ||
0dd973dd PB |
4104 | /* Special case for derived type variables that get their types |
4105 | via an IMPLICIT statement. This can't wait for the | |
4106 | resolution phase. */ | |
4107 | ||
4108 | { | |
4109 | gfc_namespace * implicit_ns; | |
4110 | ||
4111 | if (gfc_current_ns->proc_name == sym) | |
4112 | implicit_ns = gfc_current_ns; | |
4113 | else | |
4114 | implicit_ns = sym->ns; | |
5bab4c96 | 4115 | |
f6288c24 FR |
4116 | old_loc = gfc_current_locus; |
4117 | if (gfc_match_member_sep (sym) == MATCH_YES | |
0dd973dd | 4118 | && sym->ts.type == BT_UNKNOWN |
713485cc | 4119 | && gfc_get_default_type (sym->name, implicit_ns)->type == BT_DERIVED) |
0dd973dd | 4120 | gfc_set_default_type (sym, 0, implicit_ns); |
f6288c24 | 4121 | gfc_current_locus = old_loc; |
0dd973dd PB |
4122 | } |
4123 | ||
6de9cd9a DN |
4124 | expr = gfc_get_expr (); |
4125 | ||
4126 | expr->expr_type = EXPR_VARIABLE; | |
4127 | expr->symtree = st; | |
4128 | expr->ts = sym->ts; | |
4129 | expr->where = where; | |
4130 | ||
4131 | /* Now see if we have to do more. */ | |
713485cc | 4132 | m = gfc_match_varspec (expr, equiv_flag, false, false); |
6de9cd9a DN |
4133 | if (m != MATCH_YES) |
4134 | { | |
4135 | gfc_free_expr (expr); | |
4136 | return m; | |
4137 | } | |
4138 | ||
4139 | *result = expr; | |
4140 | return MATCH_YES; | |
4141 | } | |
30aabb86 | 4142 | |
edf1eac2 | 4143 | |
30aabb86 | 4144 | match |
edf1eac2 | 4145 | gfc_match_variable (gfc_expr **result, int equiv_flag) |
30aabb86 PT |
4146 | { |
4147 | return match_variable (result, equiv_flag, 1); | |
4148 | } | |
4149 | ||
edf1eac2 | 4150 | |
30aabb86 | 4151 | match |
edf1eac2 | 4152 | gfc_match_equiv_variable (gfc_expr **result) |
30aabb86 PT |
4153 | { |
4154 | return match_variable (result, 1, 0); | |
4155 | } | |
4156 |