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