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6de9cd9a | 1 | /* Primary expression subroutines |
a5544970 | 2 | Copyright (C) 2000-2019 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 |
8dc63166 SK |
435 | && gfc_invalid_boz ("Hexadecimal constant at %L uses " |
436 | "nonstandard syntax", &gfc_current_locus)) | |
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 | |
8dc63166 SK |
473 | if (gfc_invalid_boz ("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; |
f4347334 ZG |
679 | |
680 | if (kind == 4) | |
681 | { | |
203c7ebf | 682 | if (flag_real4_kind == 8) |
f4347334 | 683 | kind = 8; |
203c7ebf | 684 | if (flag_real4_kind == 10) |
f4347334 | 685 | kind = 10; |
203c7ebf | 686 | if (flag_real4_kind == 16) |
f4347334 ZG |
687 | kind = 16; |
688 | } | |
689 | ||
690 | if (kind == 8) | |
691 | { | |
203c7ebf | 692 | if (flag_real8_kind == 4) |
f4347334 | 693 | kind = 4; |
203c7ebf | 694 | if (flag_real8_kind == 10) |
f4347334 | 695 | kind = 10; |
203c7ebf | 696 | if (flag_real8_kind == 16) |
f4347334 ZG |
697 | kind = 16; |
698 | } | |
6de9cd9a DN |
699 | break; |
700 | ||
5a17346a SK |
701 | case 'q': |
702 | if (kind != -2) | |
703 | { | |
a4d9b221 | 704 | gfc_error ("Real number at %C has a %<q%> exponent and an explicit " |
5a17346a SK |
705 | "kind"); |
706 | goto cleanup; | |
707 | } | |
708 | ||
709 | /* The maximum possible real kind type parameter is 16. First, try | |
710 | that for the kind, then fallback to trying kind=10 (Intel 80 bit) | |
711 | extended precision. If neither value works, just given up. */ | |
712 | kind = 16; | |
713 | if (gfc_validate_kind (BT_REAL, kind, true) < 0) | |
714 | { | |
715 | kind = 10; | |
716 | if (gfc_validate_kind (BT_REAL, kind, true) < 0) | |
717 | { | |
a4d9b221 | 718 | gfc_error ("Invalid exponent-letter %<q%> in " |
5a17346a SK |
719 | "real-literal-constant at %C"); |
720 | goto cleanup; | |
721 | } | |
722 | } | |
723 | break; | |
724 | ||
6de9cd9a DN |
725 | default: |
726 | if (kind == -2) | |
9d64df18 | 727 | kind = gfc_default_real_kind; |
6de9cd9a | 728 | |
f4347334 ZG |
729 | if (kind == 4) |
730 | { | |
203c7ebf | 731 | if (flag_real4_kind == 8) |
f4347334 | 732 | kind = 8; |
203c7ebf | 733 | if (flag_real4_kind == 10) |
f4347334 | 734 | kind = 10; |
203c7ebf | 735 | if (flag_real4_kind == 16) |
f4347334 ZG |
736 | kind = 16; |
737 | } | |
738 | ||
739 | if (kind == 8) | |
740 | { | |
203c7ebf | 741 | if (flag_real8_kind == 4) |
f4347334 | 742 | kind = 4; |
203c7ebf | 743 | if (flag_real8_kind == 10) |
f4347334 | 744 | kind = 10; |
203c7ebf | 745 | if (flag_real8_kind == 16) |
f4347334 ZG |
746 | kind = 16; |
747 | } | |
748 | ||
e7a2d5fb | 749 | if (gfc_validate_kind (BT_REAL, kind, true) < 0) |
6de9cd9a DN |
750 | { |
751 | gfc_error ("Invalid real kind %d at %C", kind); | |
752 | goto cleanup; | |
753 | } | |
754 | } | |
755 | ||
8dc63166 | 756 | e = convert_real (buffer, kind, &gfc_current_locus); |
69029c61 PB |
757 | if (negate) |
758 | mpfr_neg (e->value.real, e->value.real, GFC_RND_MODE); | |
bee64a2b | 759 | e->ts.is_c_interop = is_iso_c; |
6de9cd9a DN |
760 | |
761 | switch (gfc_range_check (e)) | |
762 | { | |
763 | case ARITH_OK: | |
764 | break; | |
765 | case ARITH_OVERFLOW: | |
766 | gfc_error ("Real constant overflows its kind at %C"); | |
767 | goto cleanup; | |
768 | ||
769 | case ARITH_UNDERFLOW: | |
73e42eef | 770 | if (warn_underflow) |
48749dbc | 771 | gfc_warning (OPT_Wunderflow, "Real constant underflows its kind at %C"); |
f8e566e5 | 772 | mpfr_set_ui (e->value.real, 0, GFC_RND_MODE); |
2d8b59df | 773 | break; |
6de9cd9a DN |
774 | |
775 | default: | |
776 | gfc_internal_error ("gfc_range_check() returned bad value"); | |
777 | } | |
778 | ||
cbf560d7 TK |
779 | /* Warn about trailing digits which suggest the user added too many |
780 | trailing digits, which may cause the appearance of higher pecision | |
781 | than the kind kan support. | |
782 | ||
783 | This is done by replacing the rightmost non-zero digit with zero | |
784 | and comparing with the original value. If these are equal, we | |
785 | assume the user supplied more digits than intended (or forgot to | |
786 | convert to the correct kind). | |
787 | */ | |
788 | ||
789 | if (warn_conversion_extra) | |
790 | { | |
791 | mpfr_t r; | |
792 | char *c, *p; | |
793 | bool did_break; | |
794 | ||
795 | c = strchr (buffer, 'e'); | |
796 | if (c == NULL) | |
797 | c = buffer + strlen(buffer); | |
798 | ||
799 | did_break = false; | |
800 | for (p = c - 1; p >= buffer; p--) | |
801 | { | |
802 | if (*p == '.') | |
803 | continue; | |
38217d3e | 804 | |
cbf560d7 TK |
805 | if (*p != '0') |
806 | { | |
807 | *p = '0'; | |
808 | did_break = true; | |
809 | break; | |
810 | } | |
811 | } | |
812 | ||
813 | if (did_break) | |
814 | { | |
815 | mpfr_init (r); | |
816 | mpfr_set_str (r, buffer, 10, GFC_RND_MODE); | |
817 | if (negate) | |
818 | mpfr_neg (r, r, GFC_RND_MODE); | |
819 | ||
820 | mpfr_sub (r, r, e->value.real, GFC_RND_MODE); | |
821 | ||
822 | if (mpfr_cmp_ui (r, 0) == 0) | |
823 | gfc_warning (OPT_Wconversion_extra, "Non-significant digits " | |
824 | "in %qs number at %C, maybe incorrect KIND", | |
825 | gfc_typename (&e->ts)); | |
826 | ||
827 | mpfr_clear (r); | |
828 | } | |
829 | } | |
830 | ||
6de9cd9a DN |
831 | *result = e; |
832 | return MATCH_YES; | |
833 | ||
834 | cleanup: | |
835 | gfc_free_expr (e); | |
836 | return MATCH_ERROR; | |
837 | } | |
838 | ||
839 | ||
840 | /* Match a substring reference. */ | |
841 | ||
842 | static match | |
38217d3e | 843 | match_substring (gfc_charlen *cl, int init, gfc_ref **result, bool deferred) |
6de9cd9a DN |
844 | { |
845 | gfc_expr *start, *end; | |
846 | locus old_loc; | |
847 | gfc_ref *ref; | |
848 | match m; | |
849 | ||
850 | start = NULL; | |
851 | end = NULL; | |
852 | ||
63645982 | 853 | old_loc = gfc_current_locus; |
6de9cd9a DN |
854 | |
855 | m = gfc_match_char ('('); | |
856 | if (m != MATCH_YES) | |
857 | return MATCH_NO; | |
858 | ||
859 | if (gfc_match_char (':') != MATCH_YES) | |
860 | { | |
861 | if (init) | |
862 | m = gfc_match_init_expr (&start); | |
863 | else | |
864 | m = gfc_match_expr (&start); | |
865 | ||
866 | if (m != MATCH_YES) | |
867 | { | |
868 | m = MATCH_NO; | |
869 | goto cleanup; | |
870 | } | |
871 | ||
872 | m = gfc_match_char (':'); | |
873 | if (m != MATCH_YES) | |
874 | goto cleanup; | |
875 | } | |
876 | ||
877 | if (gfc_match_char (')') != MATCH_YES) | |
878 | { | |
879 | if (init) | |
880 | m = gfc_match_init_expr (&end); | |
881 | else | |
882 | m = gfc_match_expr (&end); | |
883 | ||
884 | if (m == MATCH_NO) | |
885 | goto syntax; | |
886 | if (m == MATCH_ERROR) | |
887 | goto cleanup; | |
888 | ||
889 | m = gfc_match_char (')'); | |
890 | if (m == MATCH_NO) | |
891 | goto syntax; | |
892 | } | |
893 | ||
894 | /* Optimize away the (:) reference. */ | |
38217d3e | 895 | if (start == NULL && end == NULL && !deferred) |
6de9cd9a DN |
896 | ref = NULL; |
897 | else | |
898 | { | |
899 | ref = gfc_get_ref (); | |
900 | ||
901 | ref->type = REF_SUBSTRING; | |
902 | if (start == NULL) | |
f622221a | 903 | start = gfc_get_int_expr (gfc_charlen_int_kind, NULL, 1); |
6de9cd9a DN |
904 | ref->u.ss.start = start; |
905 | if (end == NULL && cl) | |
906 | end = gfc_copy_expr (cl->length); | |
907 | ref->u.ss.end = end; | |
908 | ref->u.ss.length = cl; | |
909 | } | |
910 | ||
911 | *result = ref; | |
912 | return MATCH_YES; | |
913 | ||
914 | syntax: | |
915 | gfc_error ("Syntax error in SUBSTRING specification at %C"); | |
916 | m = MATCH_ERROR; | |
917 | ||
918 | cleanup: | |
919 | gfc_free_expr (start); | |
920 | gfc_free_expr (end); | |
921 | ||
63645982 | 922 | gfc_current_locus = old_loc; |
6de9cd9a DN |
923 | return m; |
924 | } | |
925 | ||
926 | ||
927 | /* Reads the next character of a string constant, taking care to | |
928 | return doubled delimiters on the input as a single instance of | |
929 | the delimiter. | |
930 | ||
8fc541d3 | 931 | Special return values for "ret" argument are: |
6de9cd9a DN |
932 | -1 End of the string, as determined by the delimiter |
933 | -2 Unterminated string detected | |
934 | ||
935 | Backslash codes are also expanded at this time. */ | |
936 | ||
8fc541d3 FXC |
937 | static gfc_char_t |
938 | next_string_char (gfc_char_t delimiter, int *ret) | |
6de9cd9a DN |
939 | { |
940 | locus old_locus; | |
8fc541d3 | 941 | gfc_char_t c; |
6de9cd9a | 942 | |
696abb30 | 943 | c = gfc_next_char_literal (INSTRING_WARN); |
8fc541d3 | 944 | *ret = 0; |
6de9cd9a DN |
945 | |
946 | if (c == '\n') | |
8fc541d3 FXC |
947 | { |
948 | *ret = -2; | |
949 | return 0; | |
950 | } | |
6de9cd9a | 951 | |
c61819ff | 952 | if (flag_backslash && c == '\\') |
6de9cd9a | 953 | { |
63645982 | 954 | old_locus = gfc_current_locus; |
6de9cd9a | 955 | |
a88a266c SK |
956 | if (gfc_match_special_char (&c) == MATCH_NO) |
957 | gfc_current_locus = old_locus; | |
2e6a83a7 SK |
958 | |
959 | if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings) | |
db30e21c | 960 | gfc_warning (0, "Extension: backslash character at %C"); |
6de9cd9a DN |
961 | } |
962 | ||
963 | if (c != delimiter) | |
964 | return c; | |
965 | ||
63645982 | 966 | old_locus = gfc_current_locus; |
696abb30 | 967 | c = gfc_next_char_literal (NONSTRING); |
6de9cd9a DN |
968 | |
969 | if (c == delimiter) | |
970 | return c; | |
63645982 | 971 | gfc_current_locus = old_locus; |
6de9cd9a | 972 | |
8fc541d3 FXC |
973 | *ret = -1; |
974 | return 0; | |
6de9cd9a DN |
975 | } |
976 | ||
977 | ||
978 | /* Special case of gfc_match_name() that matches a parameter kind name | |
979 | before a string constant. This takes case of the weird but legal | |
4f8ea09e | 980 | case of: |
6de9cd9a DN |
981 | |
982 | kind_____'string' | |
983 | ||
984 | where kind____ is a parameter. gfc_match_name() will happily slurp | |
985 | up all the underscores, which leads to problems. If we return | |
986 | MATCH_YES, the parse pointer points to the final underscore, which | |
987 | is not part of the name. We never return MATCH_ERROR-- errors in | |
988 | the name will be detected later. */ | |
989 | ||
990 | static match | |
991 | match_charkind_name (char *name) | |
992 | { | |
993 | locus old_loc; | |
994 | char c, peek; | |
995 | int len; | |
996 | ||
997 | gfc_gobble_whitespace (); | |
8fc541d3 | 998 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
999 | if (!ISALPHA (c)) |
1000 | return MATCH_NO; | |
1001 | ||
1002 | *name++ = c; | |
1003 | len = 1; | |
1004 | ||
1005 | for (;;) | |
1006 | { | |
63645982 | 1007 | old_loc = gfc_current_locus; |
8fc541d3 | 1008 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
1009 | |
1010 | if (c == '_') | |
1011 | { | |
8fc541d3 | 1012 | peek = gfc_peek_ascii_char (); |
6de9cd9a DN |
1013 | |
1014 | if (peek == '\'' || peek == '\"') | |
1015 | { | |
63645982 | 1016 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1017 | *name = '\0'; |
1018 | return MATCH_YES; | |
1019 | } | |
1020 | } | |
1021 | ||
1022 | if (!ISALNUM (c) | |
1023 | && c != '_' | |
c61819ff | 1024 | && (c != '$' || !flag_dollar_ok)) |
6de9cd9a DN |
1025 | break; |
1026 | ||
1027 | *name++ = c; | |
1028 | if (++len > GFC_MAX_SYMBOL_LEN) | |
1029 | break; | |
1030 | } | |
1031 | ||
1032 | return MATCH_NO; | |
1033 | } | |
1034 | ||
1035 | ||
1036 | /* See if the current input matches a character constant. Lots of | |
1037 | contortions have to be done to match the kind parameter which comes | |
1038 | before the actual string. The main consideration is that we don't | |
1039 | want to error out too quickly. For example, we don't actually do | |
1040 | any validation of the kinds until we have actually seen a legal | |
1041 | delimiter. Using match_kind_param() generates errors too quickly. */ | |
1042 | ||
1043 | static match | |
edf1eac2 | 1044 | match_string_constant (gfc_expr **result) |
6de9cd9a | 1045 | { |
00660189 | 1046 | char name[GFC_MAX_SYMBOL_LEN + 1], peek; |
6b271a2e JB |
1047 | size_t length; |
1048 | int kind,save_warn_ampersand, ret; | |
6de9cd9a DN |
1049 | locus old_locus, start_locus; |
1050 | gfc_symbol *sym; | |
1051 | gfc_expr *e; | |
6de9cd9a | 1052 | match m; |
00660189 | 1053 | gfc_char_t c, delimiter, *p; |
6de9cd9a | 1054 | |
63645982 | 1055 | old_locus = gfc_current_locus; |
6de9cd9a DN |
1056 | |
1057 | gfc_gobble_whitespace (); | |
1058 | ||
6de9cd9a DN |
1059 | c = gfc_next_char (); |
1060 | if (c == '\'' || c == '"') | |
1061 | { | |
9d64df18 | 1062 | kind = gfc_default_character_kind; |
66faed76 | 1063 | start_locus = gfc_current_locus; |
6de9cd9a DN |
1064 | goto got_delim; |
1065 | } | |
1066 | ||
8fc541d3 | 1067 | if (gfc_wide_is_digit (c)) |
6de9cd9a DN |
1068 | { |
1069 | kind = 0; | |
1070 | ||
8fc541d3 | 1071 | while (gfc_wide_is_digit (c)) |
6de9cd9a DN |
1072 | { |
1073 | kind = kind * 10 + c - '0'; | |
1074 | if (kind > 9999999) | |
1075 | goto no_match; | |
1076 | c = gfc_next_char (); | |
1077 | } | |
1078 | ||
1079 | } | |
1080 | else | |
1081 | { | |
63645982 | 1082 | gfc_current_locus = old_locus; |
6de9cd9a DN |
1083 | |
1084 | m = match_charkind_name (name); | |
1085 | if (m != MATCH_YES) | |
1086 | goto no_match; | |
1087 | ||
1088 | if (gfc_find_symbol (name, NULL, 1, &sym) | |
1089 | || sym == NULL | |
1090 | || sym->attr.flavor != FL_PARAMETER) | |
1091 | goto no_match; | |
1092 | ||
1093 | kind = -1; | |
1094 | c = gfc_next_char (); | |
1095 | } | |
1096 | ||
1097 | if (c == ' ') | |
1098 | { | |
1099 | gfc_gobble_whitespace (); | |
1100 | c = gfc_next_char (); | |
1101 | } | |
1102 | ||
1103 | if (c != '_') | |
1104 | goto no_match; | |
1105 | ||
1106 | gfc_gobble_whitespace (); | |
6de9cd9a DN |
1107 | |
1108 | c = gfc_next_char (); | |
1109 | if (c != '\'' && c != '"') | |
1110 | goto no_match; | |
1111 | ||
66faed76 DF |
1112 | start_locus = gfc_current_locus; |
1113 | ||
6de9cd9a DN |
1114 | if (kind == -1) |
1115 | { | |
51f03c6b JJ |
1116 | if (gfc_extract_int (sym->value, &kind, 1)) |
1117 | return MATCH_ERROR; | |
a39fafac | 1118 | gfc_set_sym_referenced (sym); |
6de9cd9a DN |
1119 | } |
1120 | ||
e7a2d5fb | 1121 | if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
6de9cd9a DN |
1122 | { |
1123 | gfc_error ("Invalid kind %d for CHARACTER constant at %C", kind); | |
1124 | return MATCH_ERROR; | |
1125 | } | |
1126 | ||
1127 | got_delim: | |
1128 | /* Scan the string into a block of memory by first figuring out how | |
1129 | long it is, allocating the structure, then re-reading it. This | |
1130 | isn't particularly efficient, but string constants aren't that | |
1131 | common in most code. TODO: Use obstacks? */ | |
1132 | ||
1133 | delimiter = c; | |
1134 | length = 0; | |
1135 | ||
1136 | for (;;) | |
1137 | { | |
8fc541d3 FXC |
1138 | c = next_string_char (delimiter, &ret); |
1139 | if (ret == -1) | |
6de9cd9a | 1140 | break; |
8fc541d3 | 1141 | if (ret == -2) |
6de9cd9a | 1142 | { |
63645982 | 1143 | gfc_current_locus = start_locus; |
6de9cd9a DN |
1144 | gfc_error ("Unterminated character constant beginning at %C"); |
1145 | return MATCH_ERROR; | |
1146 | } | |
1147 | ||
1148 | length++; | |
1149 | } | |
1150 | ||
78019d16 SK |
1151 | /* Peek at the next character to see if it is a b, o, z, or x for the |
1152 | postfixed BOZ literal constants. */ | |
8fc541d3 FXC |
1153 | peek = gfc_peek_ascii_char (); |
1154 | if (peek == 'b' || peek == 'o' || peek =='z' || peek == 'x') | |
78019d16 SK |
1155 | goto no_match; |
1156 | ||
b7e75771 | 1157 | e = gfc_get_character_expr (kind, &start_locus, NULL, length); |
6de9cd9a | 1158 | |
63645982 | 1159 | gfc_current_locus = start_locus; |
6de9cd9a | 1160 | |
1355d8e7 TB |
1161 | /* We disable the warning for the following loop as the warning has already |
1162 | been printed in the loop above. */ | |
73e42eef | 1163 | save_warn_ampersand = warn_ampersand; |
48749dbc | 1164 | warn_ampersand = false; |
1355d8e7 | 1165 | |
b7e75771 | 1166 | p = e->value.character.string; |
6b271a2e | 1167 | for (size_t i = 0; i < length; i++) |
8fc541d3 FXC |
1168 | { |
1169 | c = next_string_char (delimiter, &ret); | |
1170 | ||
d393bbd7 | 1171 | if (!gfc_check_character_range (c, kind)) |
8fc541d3 | 1172 | { |
efb63364 | 1173 | gfc_free_expr (e); |
a4d9b221 | 1174 | gfc_error ("Character %qs in string at %C is not representable " |
d393bbd7 | 1175 | "in character kind %d", gfc_print_wide_char (c), kind); |
8fc541d3 FXC |
1176 | return MATCH_ERROR; |
1177 | } | |
1178 | ||
00660189 | 1179 | *p++ = c; |
8fc541d3 | 1180 | } |
6de9cd9a DN |
1181 | |
1182 | *p = '\0'; /* TODO: C-style string is for development/debug purposes. */ | |
73e42eef | 1183 | warn_ampersand = save_warn_ampersand; |
6de9cd9a | 1184 | |
8fc541d3 FXC |
1185 | next_string_char (delimiter, &ret); |
1186 | if (ret != -1) | |
6de9cd9a DN |
1187 | gfc_internal_error ("match_string_constant(): Delimiter not found"); |
1188 | ||
38217d3e | 1189 | if (match_substring (NULL, 0, &e->ref, false) != MATCH_NO) |
6de9cd9a DN |
1190 | e->expr_type = EXPR_SUBSTRING; |
1191 | ||
1192 | *result = e; | |
1193 | ||
1194 | return MATCH_YES; | |
1195 | ||
1196 | no_match: | |
63645982 | 1197 | gfc_current_locus = old_locus; |
6de9cd9a DN |
1198 | return MATCH_NO; |
1199 | } | |
1200 | ||
1201 | ||
500f8f7b RS |
1202 | /* Match a .true. or .false. Returns 1 if a .true. was found, |
1203 | 0 if a .false. was found, and -1 otherwise. */ | |
1204 | static int | |
1205 | match_logical_constant_string (void) | |
1206 | { | |
1207 | locus orig_loc = gfc_current_locus; | |
1208 | ||
1209 | gfc_gobble_whitespace (); | |
8fc541d3 | 1210 | if (gfc_next_ascii_char () == '.') |
500f8f7b | 1211 | { |
8fc541d3 | 1212 | char ch = gfc_next_ascii_char (); |
500f8f7b RS |
1213 | if (ch == 'f') |
1214 | { | |
8fc541d3 FXC |
1215 | if (gfc_next_ascii_char () == 'a' |
1216 | && gfc_next_ascii_char () == 'l' | |
1217 | && gfc_next_ascii_char () == 's' | |
1218 | && gfc_next_ascii_char () == 'e' | |
1219 | && gfc_next_ascii_char () == '.') | |
500f8f7b RS |
1220 | /* Matched ".false.". */ |
1221 | return 0; | |
1222 | } | |
1223 | else if (ch == 't') | |
1224 | { | |
8fc541d3 FXC |
1225 | if (gfc_next_ascii_char () == 'r' |
1226 | && gfc_next_ascii_char () == 'u' | |
1227 | && gfc_next_ascii_char () == 'e' | |
1228 | && gfc_next_ascii_char () == '.') | |
500f8f7b RS |
1229 | /* Matched ".true.". */ |
1230 | return 1; | |
1231 | } | |
1232 | } | |
1233 | gfc_current_locus = orig_loc; | |
1234 | return -1; | |
1235 | } | |
1236 | ||
6de9cd9a DN |
1237 | /* Match a .true. or .false. */ |
1238 | ||
1239 | static match | |
edf1eac2 | 1240 | match_logical_constant (gfc_expr **result) |
6de9cd9a | 1241 | { |
6de9cd9a | 1242 | gfc_expr *e; |
bee64a2b | 1243 | int i, kind, is_iso_c; |
6de9cd9a | 1244 | |
500f8f7b | 1245 | i = match_logical_constant_string (); |
6de9cd9a DN |
1246 | if (i == -1) |
1247 | return MATCH_NO; | |
1248 | ||
bee64a2b | 1249 | kind = get_kind (&is_iso_c); |
6de9cd9a DN |
1250 | if (kind == -1) |
1251 | return MATCH_ERROR; | |
1252 | if (kind == -2) | |
9d64df18 | 1253 | kind = gfc_default_logical_kind; |
6de9cd9a | 1254 | |
e7a2d5fb | 1255 | if (gfc_validate_kind (BT_LOGICAL, kind, true) < 0) |
eb62be44 SK |
1256 | { |
1257 | gfc_error ("Bad kind for logical constant at %C"); | |
1258 | return MATCH_ERROR; | |
1259 | } | |
6de9cd9a | 1260 | |
b7e75771 | 1261 | e = gfc_get_logical_expr (kind, &gfc_current_locus, i); |
bee64a2b | 1262 | e->ts.is_c_interop = is_iso_c; |
6de9cd9a DN |
1263 | |
1264 | *result = e; | |
1265 | return MATCH_YES; | |
1266 | } | |
1267 | ||
1268 | ||
1269 | /* Match a real or imaginary part of a complex constant that is a | |
1270 | symbolic constant. */ | |
1271 | ||
1272 | static match | |
edf1eac2 | 1273 | match_sym_complex_part (gfc_expr **result) |
6de9cd9a DN |
1274 | { |
1275 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1276 | gfc_symbol *sym; | |
1277 | gfc_expr *e; | |
1278 | match m; | |
1279 | ||
1280 | m = gfc_match_name (name); | |
1281 | if (m != MATCH_YES) | |
1282 | return m; | |
1283 | ||
1284 | if (gfc_find_symbol (name, NULL, 1, &sym) || sym == NULL) | |
1285 | return MATCH_NO; | |
1286 | ||
1287 | if (sym->attr.flavor != FL_PARAMETER) | |
1288 | { | |
284ee475 | 1289 | /* Give the matcher for implied do-loops a chance to run. This yields |
a5fbc2f3 | 1290 | a much saner error message for "write(*,*) (i, i=1, 6" where the |
284ee475 SK |
1291 | right parenthesis is missing. */ |
1292 | char c; | |
1293 | gfc_gobble_whitespace (); | |
1294 | c = gfc_peek_ascii_char (); | |
1295 | if (c == '=' || c == ',') | |
1296 | { | |
1297 | m = MATCH_NO; | |
1298 | } | |
1299 | else | |
1300 | { | |
1301 | gfc_error ("Expected PARAMETER symbol in complex constant at %C"); | |
1302 | m = MATCH_ERROR; | |
1303 | } | |
1304 | return m; | |
6de9cd9a DN |
1305 | } |
1306 | ||
70db5f02 SK |
1307 | if (!sym->value) |
1308 | goto error; | |
1309 | ||
6de9cd9a DN |
1310 | if (!gfc_numeric_ts (&sym->value->ts)) |
1311 | { | |
1312 | gfc_error ("Numeric PARAMETER required in complex constant at %C"); | |
1313 | return MATCH_ERROR; | |
1314 | } | |
1315 | ||
1316 | if (sym->value->rank != 0) | |
1317 | { | |
1318 | gfc_error ("Scalar PARAMETER required in complex constant at %C"); | |
1319 | return MATCH_ERROR; | |
1320 | } | |
1321 | ||
524af0d6 JB |
1322 | if (!gfc_notify_std (GFC_STD_F2003, "PARAMETER symbol in " |
1323 | "complex constant at %C")) | |
e227ac57 FXC |
1324 | return MATCH_ERROR; |
1325 | ||
6de9cd9a DN |
1326 | switch (sym->value->ts.type) |
1327 | { | |
1328 | case BT_REAL: | |
1329 | e = gfc_copy_expr (sym->value); | |
1330 | break; | |
1331 | ||
1332 | case BT_COMPLEX: | |
1333 | e = gfc_complex2real (sym->value, sym->value->ts.kind); | |
1334 | if (e == NULL) | |
1335 | goto error; | |
1336 | break; | |
1337 | ||
1338 | case BT_INTEGER: | |
9d64df18 | 1339 | e = gfc_int2real (sym->value, gfc_default_real_kind); |
6de9cd9a DN |
1340 | if (e == NULL) |
1341 | goto error; | |
1342 | break; | |
1343 | ||
1344 | default: | |
1345 | gfc_internal_error ("gfc_match_sym_complex_part(): Bad type"); | |
1346 | } | |
1347 | ||
edf1eac2 | 1348 | *result = e; /* e is a scalar, real, constant expression. */ |
6de9cd9a DN |
1349 | return MATCH_YES; |
1350 | ||
1351 | error: | |
1352 | gfc_error ("Error converting PARAMETER constant in complex constant at %C"); | |
1353 | return MATCH_ERROR; | |
1354 | } | |
1355 | ||
1356 | ||
6de9cd9a DN |
1357 | /* Match a real or imaginary part of a complex number. */ |
1358 | ||
1359 | static match | |
edf1eac2 | 1360 | match_complex_part (gfc_expr **result) |
6de9cd9a DN |
1361 | { |
1362 | match m; | |
1363 | ||
1364 | m = match_sym_complex_part (result); | |
1365 | if (m != MATCH_NO) | |
1366 | return m; | |
1367 | ||
69029c61 PB |
1368 | m = match_real_constant (result, 1); |
1369 | if (m != MATCH_NO) | |
1370 | return m; | |
1371 | ||
1372 | return match_integer_constant (result, 1); | |
6de9cd9a DN |
1373 | } |
1374 | ||
1375 | ||
1376 | /* Try to match a complex constant. */ | |
1377 | ||
1378 | static match | |
edf1eac2 | 1379 | match_complex_constant (gfc_expr **result) |
6de9cd9a DN |
1380 | { |
1381 | gfc_expr *e, *real, *imag; | |
fea70c99 | 1382 | gfc_error_buffer old_error; |
6de9cd9a DN |
1383 | gfc_typespec target; |
1384 | locus old_loc; | |
1385 | int kind; | |
1386 | match m; | |
1387 | ||
63645982 | 1388 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1389 | real = imag = e = NULL; |
1390 | ||
1391 | m = gfc_match_char ('('); | |
1392 | if (m != MATCH_YES) | |
1393 | return m; | |
1394 | ||
fea70c99 | 1395 | gfc_push_error (&old_error); |
6de9cd9a DN |
1396 | |
1397 | m = match_complex_part (&real); | |
1398 | if (m == MATCH_NO) | |
d71b89ca | 1399 | { |
fea70c99 | 1400 | gfc_free_error (&old_error); |
d71b89ca JJ |
1401 | goto cleanup; |
1402 | } | |
6de9cd9a DN |
1403 | |
1404 | if (gfc_match_char (',') == MATCH_NO) | |
1405 | { | |
396e56d2 TK |
1406 | /* It is possible that gfc_int2real issued a warning when |
1407 | converting an integer to real. Throw this away here. */ | |
1408 | ||
1409 | gfc_clear_warning (); | |
fea70c99 | 1410 | gfc_pop_error (&old_error); |
6de9cd9a DN |
1411 | m = MATCH_NO; |
1412 | goto cleanup; | |
1413 | } | |
1414 | ||
1415 | /* If m is error, then something was wrong with the real part and we | |
1416 | assume we have a complex constant because we've seen the ','. An | |
1417 | ambiguous case here is the start of an iterator list of some | |
1418 | sort. These sort of lists are matched prior to coming here. */ | |
1419 | ||
1420 | if (m == MATCH_ERROR) | |
d71b89ca | 1421 | { |
fea70c99 | 1422 | gfc_free_error (&old_error); |
d71b89ca JJ |
1423 | goto cleanup; |
1424 | } | |
fea70c99 | 1425 | gfc_pop_error (&old_error); |
6de9cd9a DN |
1426 | |
1427 | m = match_complex_part (&imag); | |
1428 | if (m == MATCH_NO) | |
1429 | goto syntax; | |
1430 | if (m == MATCH_ERROR) | |
1431 | goto cleanup; | |
1432 | ||
1433 | m = gfc_match_char (')'); | |
1434 | if (m == MATCH_NO) | |
87ebdf2f SK |
1435 | { |
1436 | /* Give the matcher for implied do-loops a chance to run. This | |
1437 | yields a much saner error message for (/ (i, 4=i, 6) /). */ | |
8fc541d3 | 1438 | if (gfc_peek_ascii_char () == '=') |
87ebdf2f SK |
1439 | { |
1440 | m = MATCH_ERROR; | |
1441 | goto cleanup; | |
1442 | } | |
1443 | else | |
6de9cd9a | 1444 | goto syntax; |
87ebdf2f | 1445 | } |
6de9cd9a DN |
1446 | |
1447 | if (m == MATCH_ERROR) | |
1448 | goto cleanup; | |
1449 | ||
1450 | /* Decide on the kind of this complex number. */ | |
69029c61 PB |
1451 | if (real->ts.type == BT_REAL) |
1452 | { | |
1453 | if (imag->ts.type == BT_REAL) | |
1454 | kind = gfc_kind_max (real, imag); | |
1455 | else | |
1456 | kind = real->ts.kind; | |
1457 | } | |
1458 | else | |
1459 | { | |
1460 | if (imag->ts.type == BT_REAL) | |
1461 | kind = imag->ts.kind; | |
1462 | else | |
1463 | kind = gfc_default_real_kind; | |
1464 | } | |
d91909c0 | 1465 | gfc_clear_ts (&target); |
6de9cd9a DN |
1466 | target.type = BT_REAL; |
1467 | target.kind = kind; | |
1468 | ||
69029c61 | 1469 | if (real->ts.type != BT_REAL || kind != real->ts.kind) |
6de9cd9a | 1470 | gfc_convert_type (real, &target, 2); |
69029c61 | 1471 | if (imag->ts.type != BT_REAL || kind != imag->ts.kind) |
6de9cd9a DN |
1472 | gfc_convert_type (imag, &target, 2); |
1473 | ||
8dc63166 | 1474 | e = convert_complex (real, imag, kind); |
63645982 | 1475 | e->where = gfc_current_locus; |
6de9cd9a DN |
1476 | |
1477 | gfc_free_expr (real); | |
1478 | gfc_free_expr (imag); | |
1479 | ||
1480 | *result = e; | |
1481 | return MATCH_YES; | |
1482 | ||
1483 | syntax: | |
1484 | gfc_error ("Syntax error in COMPLEX constant at %C"); | |
1485 | m = MATCH_ERROR; | |
1486 | ||
1487 | cleanup: | |
1488 | gfc_free_expr (e); | |
1489 | gfc_free_expr (real); | |
1490 | gfc_free_expr (imag); | |
63645982 | 1491 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1492 | |
1493 | return m; | |
1494 | } | |
1495 | ||
1496 | ||
1497 | /* Match constants in any of several forms. Returns nonzero for a | |
1498 | match, zero for no match. */ | |
1499 | ||
1500 | match | |
edf1eac2 | 1501 | gfc_match_literal_constant (gfc_expr **result, int signflag) |
6de9cd9a DN |
1502 | { |
1503 | match m; | |
1504 | ||
1505 | m = match_complex_constant (result); | |
1506 | if (m != MATCH_NO) | |
1507 | return m; | |
1508 | ||
1509 | m = match_string_constant (result); | |
1510 | if (m != MATCH_NO) | |
1511 | return m; | |
1512 | ||
1513 | m = match_boz_constant (result); | |
1514 | if (m != MATCH_NO) | |
1515 | return m; | |
1516 | ||
1517 | m = match_real_constant (result, signflag); | |
1518 | if (m != MATCH_NO) | |
1519 | return m; | |
1520 | ||
d3642f89 FW |
1521 | m = match_hollerith_constant (result); |
1522 | if (m != MATCH_NO) | |
1523 | return m; | |
1524 | ||
6de9cd9a DN |
1525 | m = match_integer_constant (result, signflag); |
1526 | if (m != MATCH_NO) | |
1527 | return m; | |
1528 | ||
1529 | m = match_logical_constant (result); | |
1530 | if (m != MATCH_NO) | |
1531 | return m; | |
1532 | ||
1533 | return MATCH_NO; | |
1534 | } | |
1535 | ||
1536 | ||
2d71b918 JW |
1537 | /* This checks if a symbol is the return value of an encompassing function. |
1538 | Function nesting can be maximally two levels deep, but we may have | |
1539 | additional local namespaces like BLOCK etc. */ | |
1540 | ||
1541 | bool | |
1542 | gfc_is_function_return_value (gfc_symbol *sym, gfc_namespace *ns) | |
1543 | { | |
1544 | if (!sym->attr.function || (sym->result != sym)) | |
1545 | return false; | |
1546 | while (ns) | |
1547 | { | |
1548 | if (ns->proc_name == sym) | |
1549 | return true; | |
1550 | ns = ns->parent; | |
1551 | } | |
1552 | return false; | |
1553 | } | |
1554 | ||
1555 | ||
6de9cd9a DN |
1556 | /* Match a single actual argument value. An actual argument is |
1557 | usually an expression, but can also be a procedure name. If the | |
1558 | argument is a single name, it is not always possible to tell | |
1559 | whether the name is a dummy procedure or not. We treat these cases | |
1560 | by creating an argument that looks like a dummy procedure and | |
1561 | fixing things later during resolution. */ | |
1562 | ||
1563 | static match | |
edf1eac2 | 1564 | match_actual_arg (gfc_expr **result) |
6de9cd9a DN |
1565 | { |
1566 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1567 | gfc_symtree *symtree; | |
1568 | locus where, w; | |
1569 | gfc_expr *e; | |
8fc541d3 | 1570 | char c; |
6de9cd9a | 1571 | |
618f4f46 | 1572 | gfc_gobble_whitespace (); |
63645982 | 1573 | where = gfc_current_locus; |
6de9cd9a DN |
1574 | |
1575 | switch (gfc_match_name (name)) | |
1576 | { | |
1577 | case MATCH_ERROR: | |
1578 | return MATCH_ERROR; | |
1579 | ||
1580 | case MATCH_NO: | |
1581 | break; | |
1582 | ||
1583 | case MATCH_YES: | |
63645982 | 1584 | w = gfc_current_locus; |
6de9cd9a | 1585 | gfc_gobble_whitespace (); |
8fc541d3 | 1586 | c = gfc_next_ascii_char (); |
63645982 | 1587 | gfc_current_locus = w; |
6de9cd9a DN |
1588 | |
1589 | if (c != ',' && c != ')') | |
1590 | break; | |
1591 | ||
1592 | if (gfc_find_sym_tree (name, NULL, 1, &symtree)) | |
1593 | break; | |
1594 | /* Handle error elsewhere. */ | |
1595 | ||
1596 | /* Eliminate a couple of common cases where we know we don't | |
edf1eac2 | 1597 | have a function argument. */ |
6de9cd9a | 1598 | if (symtree == NULL) |
edf1eac2 | 1599 | { |
08a6b8e0 | 1600 | gfc_get_sym_tree (name, NULL, &symtree, false); |
edf1eac2 SK |
1601 | gfc_set_sym_referenced (symtree->n.sym); |
1602 | } | |
6de9cd9a DN |
1603 | else |
1604 | { | |
edf1eac2 | 1605 | gfc_symbol *sym; |
6de9cd9a | 1606 | |
edf1eac2 SK |
1607 | sym = symtree->n.sym; |
1608 | gfc_set_sym_referenced (sym); | |
c0f0e35a JD |
1609 | if (sym->attr.flavor == FL_NAMELIST) |
1610 | { | |
67914693 | 1611 | gfc_error ("Namelist %qs cannot be an argument at %L", |
c0f0e35a JD |
1612 | sym->name, &where); |
1613 | break; | |
1614 | } | |
6de9cd9a DN |
1615 | if (sym->attr.flavor != FL_PROCEDURE |
1616 | && sym->attr.flavor != FL_UNKNOWN) | |
1617 | break; | |
1618 | ||
6f9c9d6d TB |
1619 | if (sym->attr.in_common && !sym->attr.proc_pointer) |
1620 | { | |
bf1b77dd | 1621 | if (!gfc_add_flavor (&sym->attr, FL_VARIABLE, |
524af0d6 | 1622 | sym->name, &sym->declared_at)) |
efb63364 | 1623 | return MATCH_ERROR; |
6f9c9d6d TB |
1624 | break; |
1625 | } | |
1626 | ||
6de9cd9a DN |
1627 | /* If the symbol is a function with itself as the result and |
1628 | is being defined, then we have a variable. */ | |
7a4ef45b JJ |
1629 | if (sym->attr.function && sym->result == sym) |
1630 | { | |
2d71b918 | 1631 | if (gfc_is_function_return_value (sym, gfc_current_ns)) |
7a4ef45b JJ |
1632 | break; |
1633 | ||
1634 | if (sym->attr.entry | |
1635 | && (sym->ns == gfc_current_ns | |
1636 | || sym->ns == gfc_current_ns->parent)) | |
1637 | { | |
1638 | gfc_entry_list *el = NULL; | |
1639 | ||
1640 | for (el = sym->ns->entries; el; el = el->next) | |
1641 | if (sym == el->sym) | |
1642 | break; | |
1643 | ||
1644 | if (el) | |
1645 | break; | |
1646 | } | |
1647 | } | |
6de9cd9a DN |
1648 | } |
1649 | ||
1650 | e = gfc_get_expr (); /* Leave it unknown for now */ | |
1651 | e->symtree = symtree; | |
1652 | e->expr_type = EXPR_VARIABLE; | |
1653 | e->ts.type = BT_PROCEDURE; | |
1654 | e->where = where; | |
1655 | ||
1656 | *result = e; | |
1657 | return MATCH_YES; | |
1658 | } | |
1659 | ||
63645982 | 1660 | gfc_current_locus = where; |
6de9cd9a DN |
1661 | return gfc_match_expr (result); |
1662 | } | |
1663 | ||
1664 | ||
5bab4c96 | 1665 | /* Match a keyword argument or type parameter spec list.. */ |
6de9cd9a DN |
1666 | |
1667 | static match | |
5bab4c96 | 1668 | match_keyword_arg (gfc_actual_arglist *actual, gfc_actual_arglist *base, bool pdt) |
6de9cd9a DN |
1669 | { |
1670 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1671 | gfc_actual_arglist *a; | |
1672 | locus name_locus; | |
1673 | match m; | |
1674 | ||
63645982 | 1675 | name_locus = gfc_current_locus; |
6de9cd9a DN |
1676 | m = gfc_match_name (name); |
1677 | ||
1678 | if (m != MATCH_YES) | |
1679 | goto cleanup; | |
1680 | if (gfc_match_char ('=') != MATCH_YES) | |
1681 | { | |
1682 | m = MATCH_NO; | |
1683 | goto cleanup; | |
1684 | } | |
1685 | ||
5bab4c96 PT |
1686 | if (pdt) |
1687 | { | |
1688 | if (gfc_match_char ('*') == MATCH_YES) | |
1689 | { | |
1690 | actual->spec_type = SPEC_ASSUMED; | |
1691 | goto add_name; | |
1692 | } | |
1693 | else if (gfc_match_char (':') == MATCH_YES) | |
1694 | { | |
1695 | actual->spec_type = SPEC_DEFERRED; | |
1696 | goto add_name; | |
1697 | } | |
1698 | else | |
1699 | actual->spec_type = SPEC_EXPLICIT; | |
1700 | } | |
1701 | ||
6de9cd9a DN |
1702 | m = match_actual_arg (&actual->expr); |
1703 | if (m != MATCH_YES) | |
1704 | goto cleanup; | |
1705 | ||
1706 | /* Make sure this name has not appeared yet. */ | |
5bab4c96 | 1707 | add_name: |
6de9cd9a DN |
1708 | if (name[0] != '\0') |
1709 | { | |
1710 | for (a = base; a; a = a->next) | |
cb9e4f55 | 1711 | if (a->name != NULL && strcmp (a->name, name) == 0) |
6de9cd9a | 1712 | { |
a4d9b221 | 1713 | gfc_error ("Keyword %qs at %C has already appeared in the " |
edf1eac2 | 1714 | "current argument list", name); |
6de9cd9a DN |
1715 | return MATCH_ERROR; |
1716 | } | |
1717 | } | |
1718 | ||
51f03c6b | 1719 | actual->name = gfc_get_string ("%s", name); |
6de9cd9a DN |
1720 | return MATCH_YES; |
1721 | ||
1722 | cleanup: | |
63645982 | 1723 | gfc_current_locus = name_locus; |
6de9cd9a DN |
1724 | return m; |
1725 | } | |
1726 | ||
1727 | ||
7fcafa71 PT |
1728 | /* Match an argument list function, such as %VAL. */ |
1729 | ||
1730 | static match | |
1731 | match_arg_list_function (gfc_actual_arglist *result) | |
1732 | { | |
1733 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1734 | locus old_locus; | |
1735 | match m; | |
1736 | ||
1737 | old_locus = gfc_current_locus; | |
1738 | ||
1739 | if (gfc_match_char ('%') != MATCH_YES) | |
1740 | { | |
1741 | m = MATCH_NO; | |
1742 | goto cleanup; | |
1743 | } | |
1744 | ||
1745 | m = gfc_match ("%n (", name); | |
1746 | if (m != MATCH_YES) | |
1747 | goto cleanup; | |
1748 | ||
1749 | if (name[0] != '\0') | |
1750 | { | |
1751 | switch (name[0]) | |
1752 | { | |
1753 | case 'l': | |
2eb3745a | 1754 | if (gfc_str_startswith (name, "loc")) |
7fcafa71 PT |
1755 | { |
1756 | result->name = "%LOC"; | |
1757 | break; | |
1758 | } | |
191816a3 | 1759 | /* FALLTHRU */ |
7fcafa71 | 1760 | case 'r': |
2eb3745a | 1761 | if (gfc_str_startswith (name, "ref")) |
7fcafa71 PT |
1762 | { |
1763 | result->name = "%REF"; | |
1764 | break; | |
1765 | } | |
191816a3 | 1766 | /* FALLTHRU */ |
7fcafa71 | 1767 | case 'v': |
2eb3745a | 1768 | if (gfc_str_startswith (name, "val")) |
7fcafa71 PT |
1769 | { |
1770 | result->name = "%VAL"; | |
1771 | break; | |
1772 | } | |
191816a3 | 1773 | /* FALLTHRU */ |
7fcafa71 PT |
1774 | default: |
1775 | m = MATCH_ERROR; | |
1776 | goto cleanup; | |
1777 | } | |
1778 | } | |
1779 | ||
524af0d6 | 1780 | if (!gfc_notify_std (GFC_STD_GNU, "argument list function at %C")) |
7fcafa71 PT |
1781 | { |
1782 | m = MATCH_ERROR; | |
1783 | goto cleanup; | |
1784 | } | |
1785 | ||
1786 | m = match_actual_arg (&result->expr); | |
1787 | if (m != MATCH_YES) | |
1788 | goto cleanup; | |
1789 | ||
1790 | if (gfc_match_char (')') != MATCH_YES) | |
1791 | { | |
1792 | m = MATCH_NO; | |
1793 | goto cleanup; | |
1794 | } | |
1795 | ||
1796 | return MATCH_YES; | |
1797 | ||
1798 | cleanup: | |
1799 | gfc_current_locus = old_locus; | |
1800 | return m; | |
1801 | } | |
1802 | ||
1803 | ||
6de9cd9a DN |
1804 | /* Matches an actual argument list of a function or subroutine, from |
1805 | the opening parenthesis to the closing parenthesis. The argument | |
1806 | list is assumed to allow keyword arguments because we don't know if | |
1807 | the symbol associated with the procedure has an implicit interface | |
ed5ee445 | 1808 | or not. We make sure keywords are unique. If sub_flag is set, |
5bab4c96 PT |
1809 | we're matching the argument list of a subroutine. |
1810 | ||
1811 | NOTE: An alternative use for this function is to match type parameter | |
1812 | spec lists, which are so similar to actual argument lists that the | |
1813 | machinery can be reused. This use is flagged by the optional argument | |
1814 | 'pdt'. */ | |
6de9cd9a DN |
1815 | |
1816 | match | |
5bab4c96 | 1817 | gfc_match_actual_arglist (int sub_flag, gfc_actual_arglist **argp, bool pdt) |
6de9cd9a DN |
1818 | { |
1819 | gfc_actual_arglist *head, *tail; | |
1820 | int seen_keyword; | |
1821 | gfc_st_label *label; | |
1822 | locus old_loc; | |
1823 | match m; | |
1824 | ||
1825 | *argp = tail = NULL; | |
63645982 | 1826 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1827 | |
1828 | seen_keyword = 0; | |
1829 | ||
1830 | if (gfc_match_char ('(') == MATCH_NO) | |
1831 | return (sub_flag) ? MATCH_YES : MATCH_NO; | |
1832 | ||
1833 | if (gfc_match_char (')') == MATCH_YES) | |
1834 | return MATCH_YES; | |
5bab4c96 | 1835 | |
6de9cd9a DN |
1836 | head = NULL; |
1837 | ||
837c4b78 JW |
1838 | matching_actual_arglist++; |
1839 | ||
6de9cd9a DN |
1840 | for (;;) |
1841 | { | |
1842 | if (head == NULL) | |
1843 | head = tail = gfc_get_actual_arglist (); | |
1844 | else | |
1845 | { | |
1846 | tail->next = gfc_get_actual_arglist (); | |
1847 | tail = tail->next; | |
1848 | } | |
1849 | ||
5bab4c96 | 1850 | if (sub_flag && !pdt && gfc_match_char ('*') == MATCH_YES) |
6de9cd9a | 1851 | { |
a34a91f0 | 1852 | m = gfc_match_st_label (&label); |
6de9cd9a DN |
1853 | if (m == MATCH_NO) |
1854 | gfc_error ("Expected alternate return label at %C"); | |
1855 | if (m != MATCH_YES) | |
1856 | goto cleanup; | |
1857 | ||
524af0d6 JB |
1858 | if (!gfc_notify_std (GFC_STD_F95_OBS, "Alternate-return argument " |
1859 | "at %C")) | |
fbdeeaac JW |
1860 | goto cleanup; |
1861 | ||
6de9cd9a DN |
1862 | tail->label = label; |
1863 | goto next; | |
1864 | } | |
1865 | ||
5bab4c96 PT |
1866 | if (pdt && !seen_keyword) |
1867 | { | |
1868 | if (gfc_match_char (':') == MATCH_YES) | |
1869 | { | |
1870 | tail->spec_type = SPEC_DEFERRED; | |
1871 | goto next; | |
1872 | } | |
1873 | else if (gfc_match_char ('*') == MATCH_YES) | |
1874 | { | |
1875 | tail->spec_type = SPEC_ASSUMED; | |
1876 | goto next; | |
1877 | } | |
1878 | else | |
1879 | tail->spec_type = SPEC_EXPLICIT; | |
18a4e7e3 PT |
1880 | |
1881 | m = match_keyword_arg (tail, head, pdt); | |
1882 | if (m == MATCH_YES) | |
1883 | { | |
1884 | seen_keyword = 1; | |
1885 | goto next; | |
1886 | } | |
1887 | if (m == MATCH_ERROR) | |
1888 | goto cleanup; | |
5bab4c96 PT |
1889 | } |
1890 | ||
6de9cd9a | 1891 | /* After the first keyword argument is seen, the following |
edf1eac2 | 1892 | arguments must also have keywords. */ |
6de9cd9a DN |
1893 | if (seen_keyword) |
1894 | { | |
5bab4c96 | 1895 | m = match_keyword_arg (tail, head, pdt); |
6de9cd9a DN |
1896 | |
1897 | if (m == MATCH_ERROR) | |
1898 | goto cleanup; | |
1899 | if (m == MATCH_NO) | |
1900 | { | |
edf1eac2 | 1901 | gfc_error ("Missing keyword name in actual argument list at %C"); |
6de9cd9a DN |
1902 | goto cleanup; |
1903 | } | |
1904 | ||
1905 | } | |
1906 | else | |
1907 | { | |
7fcafa71 PT |
1908 | /* Try an argument list function, like %VAL. */ |
1909 | m = match_arg_list_function (tail); | |
6de9cd9a DN |
1910 | if (m == MATCH_ERROR) |
1911 | goto cleanup; | |
1912 | ||
7fcafa71 PT |
1913 | /* See if we have the first keyword argument. */ |
1914 | if (m == MATCH_NO) | |
1915 | { | |
5bab4c96 | 1916 | m = match_keyword_arg (tail, head, false); |
7fcafa71 PT |
1917 | if (m == MATCH_YES) |
1918 | seen_keyword = 1; | |
1919 | if (m == MATCH_ERROR) | |
1920 | goto cleanup; | |
1921 | } | |
1922 | ||
6de9cd9a DN |
1923 | if (m == MATCH_NO) |
1924 | { | |
1925 | /* Try for a non-keyword argument. */ | |
1926 | m = match_actual_arg (&tail->expr); | |
1927 | if (m == MATCH_ERROR) | |
1928 | goto cleanup; | |
1929 | if (m == MATCH_NO) | |
1930 | goto syntax; | |
1931 | } | |
1932 | } | |
1933 | ||
7fcafa71 | 1934 | |
6de9cd9a DN |
1935 | next: |
1936 | if (gfc_match_char (')') == MATCH_YES) | |
1937 | break; | |
1938 | if (gfc_match_char (',') != MATCH_YES) | |
1939 | goto syntax; | |
1940 | } | |
1941 | ||
1942 | *argp = head; | |
837c4b78 | 1943 | matching_actual_arglist--; |
6de9cd9a DN |
1944 | return MATCH_YES; |
1945 | ||
1946 | syntax: | |
1947 | gfc_error ("Syntax error in argument list at %C"); | |
1948 | ||
1949 | cleanup: | |
1950 | gfc_free_actual_arglist (head); | |
63645982 | 1951 | gfc_current_locus = old_loc; |
837c4b78 | 1952 | matching_actual_arglist--; |
6de9cd9a DN |
1953 | return MATCH_ERROR; |
1954 | } | |
1955 | ||
1956 | ||
8e1f752a | 1957 | /* Used by gfc_match_varspec() to extend the reference list by one |
6de9cd9a DN |
1958 | element. */ |
1959 | ||
1960 | static gfc_ref * | |
edf1eac2 | 1961 | extend_ref (gfc_expr *primary, gfc_ref *tail) |
6de9cd9a | 1962 | { |
6de9cd9a DN |
1963 | if (primary->ref == NULL) |
1964 | primary->ref = tail = gfc_get_ref (); | |
1965 | else | |
1966 | { | |
1967 | if (tail == NULL) | |
1968 | gfc_internal_error ("extend_ref(): Bad tail"); | |
1969 | tail->next = gfc_get_ref (); | |
1970 | tail = tail->next; | |
1971 | } | |
1972 | ||
1973 | return tail; | |
1974 | } | |
1975 | ||
1976 | ||
a5fbc2f3 PT |
1977 | /* Used by gfc_match_varspec() to match an inquiry reference. */ |
1978 | ||
1979 | static bool | |
1980 | is_inquiry_ref (const char *name, gfc_ref **ref) | |
1981 | { | |
1982 | inquiry_type type; | |
1983 | ||
1984 | if (name == NULL) | |
1985 | return false; | |
1986 | ||
1987 | if (ref) *ref = NULL; | |
1988 | ||
1989 | if (strcmp (name, "re") == 0) | |
1990 | type = INQUIRY_RE; | |
1991 | else if (strcmp (name, "im") == 0) | |
1992 | type = INQUIRY_IM; | |
1993 | else if (strcmp (name, "kind") == 0) | |
1994 | type = INQUIRY_KIND; | |
1995 | else if (strcmp (name, "len") == 0) | |
1996 | type = INQUIRY_LEN; | |
1997 | else | |
1998 | return false; | |
1999 | ||
2000 | if (ref) | |
2001 | { | |
2002 | *ref = gfc_get_ref (); | |
2003 | (*ref)->type = REF_INQUIRY; | |
2004 | (*ref)->u.i = type; | |
2005 | } | |
2006 | ||
2007 | return true; | |
2008 | } | |
2009 | ||
2010 | ||
6de9cd9a DN |
2011 | /* Match any additional specifications associated with the current |
2012 | variable like member references or substrings. If equiv_flag is | |
2013 | set we only match stuff that is allowed inside an EQUIVALENCE | |
8e1f752a | 2014 | statement. sub_flag tells whether we expect a type-bound procedure found |
713485cc JW |
2015 | to be a subroutine as part of CALL or a FUNCTION. For procedure pointer |
2016 | components, 'ppc_arg' determines whether the PPC may be called (with an | |
2017 | argument list), or whether it may just be referred to as a pointer. */ | |
6de9cd9a | 2018 | |
8e1f752a | 2019 | match |
713485cc JW |
2020 | gfc_match_varspec (gfc_expr *primary, int equiv_flag, bool sub_flag, |
2021 | bool ppc_arg) | |
6de9cd9a DN |
2022 | { |
2023 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
f6288c24 | 2024 | gfc_ref *substring, *tail, *tmp; |
6de9cd9a | 2025 | gfc_component *component; |
a8006d09 | 2026 | gfc_symbol *sym = primary->symtree->n.sym; |
b89a63b9 | 2027 | gfc_expr *tgt_expr = NULL; |
6de9cd9a | 2028 | match m; |
f2d3cb25 | 2029 | bool unknown; |
a5fbc2f3 PT |
2030 | bool inquiry; |
2031 | locus old_loc; | |
f6288c24 | 2032 | char sep; |
6de9cd9a DN |
2033 | |
2034 | tail = NULL; | |
2035 | ||
3c721513 | 2036 | gfc_gobble_whitespace (); |
d3a9eea2 TB |
2037 | |
2038 | if (gfc_peek_ascii_char () == '[') | |
2039 | { | |
c49ea23d PT |
2040 | if ((sym->ts.type != BT_CLASS && sym->attr.dimension) |
2041 | || (sym->ts.type == BT_CLASS && CLASS_DATA (sym) | |
2042 | && CLASS_DATA (sym)->attr.dimension)) | |
d3a9eea2 TB |
2043 | { |
2044 | gfc_error ("Array section designator, e.g. '(:)', is required " | |
2045 | "besides the coarray designator '[...]' at %C"); | |
2046 | return MATCH_ERROR; | |
2047 | } | |
c49ea23d PT |
2048 | if ((sym->ts.type != BT_CLASS && !sym->attr.codimension) |
2049 | || (sym->ts.type == BT_CLASS && CLASS_DATA (sym) | |
2050 | && !CLASS_DATA (sym)->attr.codimension)) | |
d3a9eea2 | 2051 | { |
a4d9b221 | 2052 | gfc_error ("Coarray designator at %C but %qs is not a coarray", |
d3a9eea2 TB |
2053 | sym->name); |
2054 | return MATCH_ERROR; | |
2055 | } | |
2056 | } | |
2057 | ||
b89a63b9 PT |
2058 | if (sym->assoc && sym->assoc->target) |
2059 | tgt_expr = sym->assoc->target; | |
2060 | ||
52bf62f9 | 2061 | /* For associate names, we may not yet know whether they are arrays or not. |
b125dc1e PT |
2062 | If the selector expression is unambiguously an array; eg. a full array |
2063 | or an array section, then the associate name must be an array and we can | |
2064 | fix it now. Otherwise, if parentheses follow and it is not a character | |
2065 | type, we have to assume that it actually is one for now. The final | |
2066 | decision will be made at resolution, of course. */ | |
2067 | if (sym->assoc | |
2068 | && gfc_peek_ascii_char () == '(' | |
2069 | && sym->ts.type != BT_CLASS | |
2070 | && !sym->attr.dimension) | |
2071 | { | |
b89a63b9 PT |
2072 | gfc_ref *ref = NULL; |
2073 | ||
2074 | if (!sym->assoc->dangling && tgt_expr) | |
2075 | { | |
2076 | if (tgt_expr->expr_type == EXPR_VARIABLE) | |
2077 | gfc_resolve_expr (tgt_expr); | |
2078 | ||
2079 | ref = tgt_expr->ref; | |
2080 | for (; ref; ref = ref->next) | |
2081 | if (ref->type == REF_ARRAY | |
2082 | && (ref->u.ar.type == AR_FULL | |
2083 | || ref->u.ar.type == AR_SECTION)) | |
2084 | break; | |
2085 | } | |
2086 | ||
2087 | if (ref || (!(sym->assoc->dangling || sym->ts.type == BT_CHARACTER) | |
2088 | && sym->assoc->st | |
2089 | && sym->assoc->st->n.sym | |
2090 | && sym->assoc->st->n.sym->attr.dimension == 0)) | |
b125dc1e | 2091 | { |
b89a63b9 PT |
2092 | sym->attr.dimension = 1; |
2093 | if (sym->as == NULL | |
b125dc1e PT |
2094 | && sym->assoc->st |
2095 | && sym->assoc->st->n.sym | |
2096 | && sym->assoc->st->n.sym->as) | |
2097 | sym->as = gfc_copy_array_spec (sym->assoc->st->n.sym->as); | |
2098 | } | |
2099 | } | |
b89a63b9 PT |
2100 | else if (sym->ts.type == BT_CLASS |
2101 | && tgt_expr | |
2102 | && tgt_expr->expr_type == EXPR_VARIABLE | |
2103 | && sym->ts.u.derived != tgt_expr->ts.u.derived) | |
2104 | { | |
2105 | gfc_resolve_expr (tgt_expr); | |
2106 | if (tgt_expr->rank) | |
2107 | sym->ts.u.derived = tgt_expr->ts.u.derived; | |
2108 | } | |
52bf62f9 | 2109 | |
c74b74a8 | 2110 | if ((equiv_flag && gfc_peek_ascii_char () == '(') |
d3a9eea2 | 2111 | || gfc_peek_ascii_char () == '[' || sym->attr.codimension |
ce2ab24c | 2112 | || (sym->attr.dimension && sym->ts.type != BT_CLASS |
2a573572 | 2113 | && !sym->attr.proc_pointer && !gfc_is_proc_ptr_comp (primary) |
f64edc8b | 2114 | && !(gfc_matching_procptr_assignment |
cf2b3c22 | 2115 | && sym->attr.flavor == FL_PROCEDURE)) |
22061030 | 2116 | || (sym->ts.type == BT_CLASS && sym->attr.class_ok |
492792ed TB |
2117 | && (CLASS_DATA (sym)->attr.dimension |
2118 | || CLASS_DATA (sym)->attr.codimension))) | |
6de9cd9a | 2119 | { |
102344e2 TB |
2120 | gfc_array_spec *as; |
2121 | ||
2122 | tail = extend_ref (primary, tail); | |
2123 | tail->type = REF_ARRAY; | |
2124 | ||
a8006d09 JJ |
2125 | /* In EQUIVALENCE, we don't know yet whether we are seeing |
2126 | an array, character variable or array of character | |
edf1eac2 | 2127 | variables. We'll leave the decision till resolve time. */ |
6de9cd9a | 2128 | |
102344e2 TB |
2129 | if (equiv_flag) |
2130 | as = NULL; | |
2131 | else if (sym->ts.type == BT_CLASS && CLASS_DATA (sym)) | |
2132 | as = CLASS_DATA (sym)->as; | |
2133 | else | |
2134 | as = sym->as; | |
2135 | ||
2136 | m = gfc_match_array_ref (&tail->u.ar, as, equiv_flag, | |
2137 | as ? as->corank : 0); | |
6de9cd9a DN |
2138 | if (m != MATCH_YES) |
2139 | return m; | |
a8006d09 | 2140 | |
3c721513 | 2141 | gfc_gobble_whitespace (); |
8fc541d3 | 2142 | if (equiv_flag && gfc_peek_ascii_char () == '(') |
a8006d09 JJ |
2143 | { |
2144 | tail = extend_ref (primary, tail); | |
2145 | tail->type = REF_ARRAY; | |
2146 | ||
d3a9eea2 | 2147 | m = gfc_match_array_ref (&tail->u.ar, NULL, equiv_flag, 0); |
a8006d09 JJ |
2148 | if (m != MATCH_YES) |
2149 | return m; | |
2150 | } | |
6de9cd9a DN |
2151 | } |
2152 | ||
6de9cd9a DN |
2153 | primary->ts = sym->ts; |
2154 | ||
a8006d09 JJ |
2155 | if (equiv_flag) |
2156 | return MATCH_YES; | |
2157 | ||
f6288c24 FR |
2158 | /* With DEC extensions, member separator may be '.' or '%'. */ |
2159 | sep = gfc_peek_ascii_char (); | |
2160 | m = gfc_match_member_sep (sym); | |
2161 | if (m == MATCH_ERROR) | |
2162 | return MATCH_ERROR; | |
2163 | ||
a5fbc2f3 PT |
2164 | inquiry = false; |
2165 | if (m == MATCH_YES && sep == '%' | |
2166 | && primary->ts.type != BT_CLASS | |
2167 | && primary->ts.type != BT_DERIVED) | |
2168 | { | |
2169 | match mm; | |
2170 | old_loc = gfc_current_locus; | |
2171 | mm = gfc_match_name (name); | |
2172 | if (mm == MATCH_YES && is_inquiry_ref (name, &tmp)) | |
2173 | inquiry = true; | |
2174 | gfc_current_locus = old_loc; | |
2175 | } | |
2176 | ||
f6288c24 | 2177 | if (sym->ts.type == BT_UNKNOWN && m == MATCH_YES |
713485cc | 2178 | && gfc_get_default_type (sym->name, sym->ns)->type == BT_DERIVED) |
ebac6d9c DK |
2179 | gfc_set_default_type (sym, 0, sym->ns); |
2180 | ||
b89a63b9 | 2181 | /* See if there is a usable typespec in the "no IMPLICIT type" error. */ |
f6288c24 | 2182 | if (sym->ts.type == BT_UNKNOWN && m == MATCH_YES) |
6ee65df3 | 2183 | { |
b89a63b9 PT |
2184 | bool permissible; |
2185 | ||
a8399af8 | 2186 | /* These target expressions can be resolved at any time. */ |
b89a63b9 PT |
2187 | permissible = tgt_expr && tgt_expr->symtree && tgt_expr->symtree->n.sym |
2188 | && (tgt_expr->symtree->n.sym->attr.use_assoc | |
2189 | || tgt_expr->symtree->n.sym->attr.host_assoc | |
2190 | || tgt_expr->symtree->n.sym->attr.if_source | |
2191 | == IFSRC_DECL); | |
2192 | permissible = permissible | |
2193 | || (tgt_expr && tgt_expr->expr_type == EXPR_OP); | |
2194 | ||
2195 | if (permissible) | |
62d3c075 | 2196 | { |
b89a63b9 PT |
2197 | gfc_resolve_expr (tgt_expr); |
2198 | sym->ts = tgt_expr->ts; | |
62d3c075 PT |
2199 | } |
2200 | ||
2201 | if (sym->ts.type == BT_UNKNOWN) | |
2202 | { | |
2203 | gfc_error ("Symbol %qs at %C has no IMPLICIT type", sym->name); | |
2204 | return MATCH_ERROR; | |
2205 | } | |
6ee65df3 TB |
2206 | } |
2207 | else if ((sym->ts.type != BT_DERIVED && sym->ts.type != BT_CLASS) | |
a5fbc2f3 | 2208 | && m == MATCH_YES && !inquiry) |
6ee65df3 | 2209 | { |
f6288c24 FR |
2210 | gfc_error ("Unexpected %<%c%> for nonderived-type variable %qs at %C", |
2211 | sep, sym->name); | |
6ee65df3 TB |
2212 | return MATCH_ERROR; |
2213 | } | |
2214 | ||
a5fbc2f3 | 2215 | if ((sym->ts.type != BT_DERIVED && sym->ts.type != BT_CLASS && !inquiry) |
f6288c24 | 2216 | || m != MATCH_YES) |
6de9cd9a DN |
2217 | goto check_substring; |
2218 | ||
a5fbc2f3 PT |
2219 | if (!inquiry) |
2220 | sym = sym->ts.u.derived; | |
2221 | else | |
2222 | sym = NULL; | |
6de9cd9a DN |
2223 | |
2224 | for (;;) | |
2225 | { | |
524af0d6 | 2226 | bool t; |
e157f736 | 2227 | gfc_symtree *tbp; |
8e1f752a | 2228 | |
6de9cd9a DN |
2229 | m = gfc_match_name (name); |
2230 | if (m == MATCH_NO) | |
2231 | gfc_error ("Expected structure component name at %C"); | |
2232 | if (m != MATCH_YES) | |
2233 | return MATCH_ERROR; | |
2234 | ||
a5fbc2f3 PT |
2235 | if (primary->ts.type != BT_CLASS && primary->ts.type != BT_DERIVED) |
2236 | { | |
2237 | inquiry = is_inquiry_ref (name, &tmp); | |
2238 | if (inquiry) | |
2239 | sym = NULL; | |
2240 | } | |
2241 | else | |
2242 | inquiry = false; | |
2243 | ||
d5c50b02 | 2244 | if (sym && sym->f2k_derived) |
b2acf594 PT |
2245 | tbp = gfc_find_typebound_proc (sym, &t, name, false, &gfc_current_locus); |
2246 | else | |
2247 | tbp = NULL; | |
2248 | ||
8e1f752a DK |
2249 | if (tbp) |
2250 | { | |
2251 | gfc_symbol* tbp_sym; | |
2252 | ||
524af0d6 | 2253 | if (!t) |
8e1f752a DK |
2254 | return MATCH_ERROR; |
2255 | ||
2256 | gcc_assert (!tail || !tail->next); | |
236e3815 JW |
2257 | |
2258 | if (!(primary->expr_type == EXPR_VARIABLE | |
2259 | || (primary->expr_type == EXPR_STRUCTURE | |
2260 | && primary->symtree && primary->symtree->n.sym | |
2261 | && primary->symtree->n.sym->attr.flavor))) | |
2262 | return MATCH_ERROR; | |
8e1f752a | 2263 | |
e34ccb4c | 2264 | if (tbp->n.tb->is_generic) |
e157f736 DK |
2265 | tbp_sym = NULL; |
2266 | else | |
e34ccb4c | 2267 | tbp_sym = tbp->n.tb->u.specific->n.sym; |
8e1f752a DK |
2268 | |
2269 | primary->expr_type = EXPR_COMPCALL; | |
e34ccb4c | 2270 | primary->value.compcall.tbp = tbp->n.tb; |
e157f736 | 2271 | primary->value.compcall.name = tbp->name; |
4a44a72d DK |
2272 | primary->value.compcall.ignore_pass = 0; |
2273 | primary->value.compcall.assign = 0; | |
2274 | primary->value.compcall.base_object = NULL; | |
e157f736 DK |
2275 | gcc_assert (primary->symtree->n.sym->attr.referenced); |
2276 | if (tbp_sym) | |
2277 | primary->ts = tbp_sym->ts; | |
049bb74e JW |
2278 | else |
2279 | gfc_clear_ts (&primary->ts); | |
e157f736 | 2280 | |
e34ccb4c | 2281 | m = gfc_match_actual_arglist (tbp->n.tb->subroutine, |
8e1f752a DK |
2282 | &primary->value.compcall.actual); |
2283 | if (m == MATCH_ERROR) | |
2284 | return MATCH_ERROR; | |
2285 | if (m == MATCH_NO) | |
2286 | { | |
2287 | if (sub_flag) | |
2288 | primary->value.compcall.actual = NULL; | |
2289 | else | |
2290 | { | |
2291 | gfc_error ("Expected argument list at %C"); | |
2292 | return MATCH_ERROR; | |
2293 | } | |
2294 | } | |
2295 | ||
8e1f752a DK |
2296 | break; |
2297 | } | |
2298 | ||
a5fbc2f3 PT |
2299 | if (!inquiry) |
2300 | component = gfc_find_component (sym, name, false, false, &tmp); | |
2301 | else | |
2302 | component = NULL; | |
2303 | ||
2304 | if (component == NULL && !inquiry) | |
6de9cd9a DN |
2305 | return MATCH_ERROR; |
2306 | ||
a5fbc2f3 PT |
2307 | /* Extend the reference chain determined by gfc_find_component or |
2308 | is_inquiry_ref. */ | |
f6288c24 | 2309 | if (primary->ref == NULL) |
a5fbc2f3 | 2310 | primary->ref = tmp; |
f6288c24 | 2311 | else |
a5fbc2f3 PT |
2312 | { |
2313 | /* Set by the for loop below for the last component ref. */ | |
2314 | gcc_assert (tail != NULL); | |
2315 | tail->next = tmp; | |
2316 | } | |
6de9cd9a | 2317 | |
f6288c24 | 2318 | /* The reference chain may be longer than one hop for union |
a5fbc2f3 | 2319 | subcomponents; find the new tail. */ |
f6288c24 | 2320 | for (tail = tmp; tail->next; tail = tail->next) |
a5fbc2f3 PT |
2321 | ; |
2322 | ||
2323 | if (tmp && tmp->type == REF_INQUIRY) | |
2324 | { | |
2325 | gfc_simplify_expr (primary, 0); | |
2326 | ||
2327 | if (primary->expr_type == EXPR_CONSTANT) | |
2328 | goto check_done; | |
2329 | ||
2330 | switch (tmp->u.i) | |
2331 | { | |
2332 | case INQUIRY_RE: | |
2333 | case INQUIRY_IM: | |
2334 | if (!gfc_notify_std (GFC_STD_F2008, "RE or IM part_ref at %C")) | |
2335 | return MATCH_ERROR; | |
2336 | ||
2337 | if (primary->ts.type != BT_COMPLEX) | |
2338 | { | |
2339 | gfc_error ("The RE or IM part_ref at %C must be " | |
2340 | "applied to a COMPLEX expression"); | |
2341 | return MATCH_ERROR; | |
2342 | } | |
2343 | primary->ts.type = BT_REAL; | |
2344 | break; | |
2345 | ||
2346 | case INQUIRY_LEN: | |
2347 | if (!gfc_notify_std (GFC_STD_F2003, "LEN part_ref at %C")) | |
2348 | return MATCH_ERROR; | |
2349 | ||
2350 | if (primary->ts.type != BT_CHARACTER) | |
2351 | { | |
2352 | gfc_error ("The LEN part_ref at %C must be applied " | |
2353 | "to a CHARACTER expression"); | |
2354 | return MATCH_ERROR; | |
2355 | } | |
2356 | primary->ts.u.cl = NULL; | |
2357 | primary->ts.type = BT_INTEGER; | |
2358 | primary->ts.kind = gfc_default_integer_kind; | |
2359 | break; | |
2360 | ||
2361 | case INQUIRY_KIND: | |
2362 | if (!gfc_notify_std (GFC_STD_F2003, "KIND part_ref at %C")) | |
2363 | return MATCH_ERROR; | |
2364 | ||
2365 | if (primary->ts.type == BT_CLASS | |
2366 | || primary->ts.type == BT_DERIVED) | |
2367 | { | |
2368 | gfc_error ("The KIND part_ref at %C must be applied " | |
2369 | "to an expression of intrinsic type"); | |
2370 | return MATCH_ERROR; | |
2371 | } | |
2372 | primary->ts.type = BT_INTEGER; | |
2373 | primary->ts.kind = gfc_default_integer_kind; | |
2374 | break; | |
2375 | ||
2376 | default: | |
2377 | gcc_unreachable (); | |
2378 | } | |
2379 | ||
2380 | goto check_done; | |
2381 | } | |
6de9cd9a DN |
2382 | |
2383 | primary->ts = component->ts; | |
2384 | ||
a4a76e52 | 2385 | if (component->attr.proc_pointer && ppc_arg) |
713485cc | 2386 | { |
837c4b78 | 2387 | /* Procedure pointer component call: Look for argument list. */ |
23878536 | 2388 | m = gfc_match_actual_arglist (sub_flag, |
713485cc JW |
2389 | &primary->value.compcall.actual); |
2390 | if (m == MATCH_ERROR) | |
2391 | return MATCH_ERROR; | |
837c4b78 JW |
2392 | |
2393 | if (m == MATCH_NO && !gfc_matching_ptr_assignment | |
a4a76e52 | 2394 | && !gfc_matching_procptr_assignment && !matching_actual_arglist) |
837c4b78 | 2395 | { |
a4d9b221 | 2396 | gfc_error ("Procedure pointer component %qs requires an " |
837c4b78 JW |
2397 | "argument list at %C", component->name); |
2398 | return MATCH_ERROR; | |
2399 | } | |
2400 | ||
23878536 JW |
2401 | if (m == MATCH_YES) |
2402 | primary->expr_type = EXPR_PPC; | |
713485cc JW |
2403 | |
2404 | break; | |
2405 | } | |
2406 | ||
c74b74a8 | 2407 | if (component->as != NULL && !component->attr.proc_pointer) |
6de9cd9a DN |
2408 | { |
2409 | tail = extend_ref (primary, tail); | |
2410 | tail->type = REF_ARRAY; | |
2411 | ||
d3a9eea2 TB |
2412 | m = gfc_match_array_ref (&tail->u.ar, component->as, equiv_flag, |
2413 | component->as->corank); | |
6de9cd9a DN |
2414 | if (m != MATCH_YES) |
2415 | return m; | |
2416 | } | |
156c0160 JW |
2417 | else if (component->ts.type == BT_CLASS && component->attr.class_ok |
2418 | && CLASS_DATA (component)->as && !component->attr.proc_pointer) | |
cf2b3c22 TB |
2419 | { |
2420 | tail = extend_ref (primary, tail); | |
2421 | tail->type = REF_ARRAY; | |
6de9cd9a | 2422 | |
7a08eda1 | 2423 | m = gfc_match_array_ref (&tail->u.ar, CLASS_DATA (component)->as, |
d3a9eea2 | 2424 | equiv_flag, |
7a08eda1 | 2425 | CLASS_DATA (component)->as->corank); |
cf2b3c22 TB |
2426 | if (m != MATCH_YES) |
2427 | return m; | |
2428 | } | |
2429 | ||
a5fbc2f3 PT |
2430 | check_done: |
2431 | /* In principle, we could have eg. expr%re%kind so we must allow for | |
2432 | this possibility. */ | |
2433 | if (gfc_match_char ('%') == MATCH_YES) | |
2434 | { | |
2435 | if (component && (component->ts.type == BT_DERIVED | |
2436 | || component->ts.type == BT_CLASS)) | |
2437 | sym = component->ts.u.derived; | |
2438 | continue; | |
2439 | } | |
2440 | else if (inquiry) | |
2441 | break; | |
2442 | ||
cf2b3c22 | 2443 | if ((component->ts.type != BT_DERIVED && component->ts.type != BT_CLASS) |
a5fbc2f3 | 2444 | || gfc_match_member_sep (component->ts.u.derived) != MATCH_YES) |
6de9cd9a DN |
2445 | break; |
2446 | ||
a5fbc2f3 PT |
2447 | if (component->ts.type == BT_DERIVED || component->ts.type == BT_CLASS) |
2448 | sym = component->ts.u.derived; | |
6de9cd9a DN |
2449 | } |
2450 | ||
2451 | check_substring: | |
f2d3cb25 | 2452 | unknown = false; |
f6288c24 | 2453 | if (primary->ts.type == BT_UNKNOWN && !gfc_fl_struct (sym->attr.flavor)) |
c040ffff | 2454 | { |
713485cc | 2455 | if (gfc_get_default_type (sym->name, sym->ns)->type == BT_CHARACTER) |
c040ffff | 2456 | { |
edf1eac2 SK |
2457 | gfc_set_default_type (sym, 0, sym->ns); |
2458 | primary->ts = sym->ts; | |
f2d3cb25 | 2459 | unknown = true; |
c040ffff TS |
2460 | } |
2461 | } | |
2462 | ||
6de9cd9a DN |
2463 | if (primary->ts.type == BT_CHARACTER) |
2464 | { | |
38217d3e PT |
2465 | bool def = primary->ts.deferred == 1; |
2466 | switch (match_substring (primary->ts.u.cl, equiv_flag, &substring, def)) | |
6de9cd9a DN |
2467 | { |
2468 | case MATCH_YES: | |
2469 | if (tail == NULL) | |
2470 | primary->ref = substring; | |
2471 | else | |
2472 | tail->next = substring; | |
2473 | ||
2474 | if (primary->expr_type == EXPR_CONSTANT) | |
2475 | primary->expr_type = EXPR_SUBSTRING; | |
2476 | ||
860c8f3b | 2477 | if (substring) |
bc21d315 | 2478 | primary->ts.u.cl = NULL; |
860c8f3b | 2479 | |
6de9cd9a DN |
2480 | break; |
2481 | ||
2482 | case MATCH_NO: | |
f2d3cb25 | 2483 | if (unknown) |
858f1fa2 DK |
2484 | { |
2485 | gfc_clear_ts (&primary->ts); | |
2486 | gfc_clear_ts (&sym->ts); | |
2487 | } | |
6de9cd9a DN |
2488 | break; |
2489 | ||
2490 | case MATCH_ERROR: | |
2491 | return MATCH_ERROR; | |
2492 | } | |
2493 | } | |
2494 | ||
4ceda204 JW |
2495 | /* F08:C611. */ |
2496 | if (primary->ts.type == BT_DERIVED && primary->ref | |
2497 | && primary->ts.u.derived && primary->ts.u.derived->attr.abstract) | |
2498 | { | |
2499 | gfc_error ("Nonpolymorphic reference to abstract type at %C"); | |
2500 | return MATCH_ERROR; | |
2501 | } | |
2502 | ||
2503 | /* F08:C727. */ | |
d3a9eea2 TB |
2504 | if (primary->expr_type == EXPR_PPC && gfc_is_coindexed (primary)) |
2505 | { | |
2506 | gfc_error ("Coindexed procedure-pointer component at %C"); | |
2507 | return MATCH_ERROR; | |
2508 | } | |
2509 | ||
6de9cd9a DN |
2510 | return MATCH_YES; |
2511 | } | |
2512 | ||
2513 | ||
2514 | /* Given an expression that is a variable, figure out what the | |
2515 | ultimate variable's type and attribute is, traversing the reference | |
2516 | structures if necessary. | |
2517 | ||
2518 | This subroutine is trickier than it looks. We start at the base | |
2519 | symbol and store the attribute. Component references load a | |
2520 | completely new attribute. | |
2521 | ||
2522 | A couple of rules come into play. Subobjects of targets are always | |
2523 | targets themselves. If we see a component that goes through a | |
2524 | pointer, then the expression must also be a target, since the | |
2525 | pointer is associated with something (if it isn't core will soon be | |
2526 | dumped). If we see a full part or section of an array, the | |
2527 | expression is also an array. | |
2528 | ||
f7b529fa | 2529 | We can have at most one full array reference. */ |
6de9cd9a DN |
2530 | |
2531 | symbol_attribute | |
edf1eac2 | 2532 | gfc_variable_attr (gfc_expr *expr, gfc_typespec *ts) |
6de9cd9a | 2533 | { |
16acb1a8 | 2534 | int dimension, codimension, pointer, allocatable, target; |
6de9cd9a DN |
2535 | symbol_attribute attr; |
2536 | gfc_ref *ref; | |
cf2b3c22 TB |
2537 | gfc_symbol *sym; |
2538 | gfc_component *comp; | |
a5fbc2f3 | 2539 | bool has_inquiry_part; |
6de9cd9a | 2540 | |
50dbf0b4 | 2541 | if (expr->expr_type != EXPR_VARIABLE && expr->expr_type != EXPR_FUNCTION) |
6de9cd9a DN |
2542 | gfc_internal_error ("gfc_variable_attr(): Expression isn't a variable"); |
2543 | ||
cf2b3c22 TB |
2544 | sym = expr->symtree->n.sym; |
2545 | attr = sym->attr; | |
6de9cd9a | 2546 | |
528622fd | 2547 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok) |
cf2b3c22 | 2548 | { |
7a08eda1 | 2549 | dimension = CLASS_DATA (sym)->attr.dimension; |
83ba23b7 | 2550 | codimension = CLASS_DATA (sym)->attr.codimension; |
d40477b4 | 2551 | pointer = CLASS_DATA (sym)->attr.class_pointer; |
7a08eda1 | 2552 | allocatable = CLASS_DATA (sym)->attr.allocatable; |
cf2b3c22 TB |
2553 | } |
2554 | else | |
2555 | { | |
2556 | dimension = attr.dimension; | |
83ba23b7 | 2557 | codimension = attr.codimension; |
cf2b3c22 TB |
2558 | pointer = attr.pointer; |
2559 | allocatable = attr.allocatable; | |
2560 | } | |
6de9cd9a DN |
2561 | |
2562 | target = attr.target; | |
713485cc | 2563 | if (pointer || attr.proc_pointer) |
6de9cd9a DN |
2564 | target = 1; |
2565 | ||
2566 | if (ts != NULL && expr->ts.type == BT_UNKNOWN) | |
cf2b3c22 | 2567 | *ts = sym->ts; |
6de9cd9a | 2568 | |
a5fbc2f3 PT |
2569 | has_inquiry_part = false; |
2570 | for (ref = expr->ref; ref; ref = ref->next) | |
2571 | if (ref->type == REF_INQUIRY) | |
2572 | { | |
2573 | has_inquiry_part = true; | |
2574 | break; | |
2575 | } | |
2576 | ||
8c91ab34 | 2577 | for (ref = expr->ref; ref; ref = ref->next) |
6de9cd9a DN |
2578 | switch (ref->type) |
2579 | { | |
2580 | case REF_ARRAY: | |
2581 | ||
2582 | switch (ref->u.ar.type) | |
2583 | { | |
2584 | case AR_FULL: | |
2585 | dimension = 1; | |
2586 | break; | |
2587 | ||
2588 | case AR_SECTION: | |
5046aff5 | 2589 | allocatable = pointer = 0; |
6de9cd9a DN |
2590 | dimension = 1; |
2591 | break; | |
2592 | ||
2593 | case AR_ELEMENT: | |
d3a9eea2 TB |
2594 | /* Handle coarrays. */ |
2595 | if (ref->u.ar.dimen > 0) | |
2596 | allocatable = pointer = 0; | |
6de9cd9a DN |
2597 | break; |
2598 | ||
2599 | case AR_UNKNOWN: | |
bf1b77dd PT |
2600 | /* If any of start, end or stride is not integer, there will |
2601 | already have been an error issued. */ | |
16acb1a8 DH |
2602 | int errors; |
2603 | gfc_get_errors (NULL, &errors); | |
2604 | if (errors == 0) | |
bf1b77dd | 2605 | gfc_internal_error ("gfc_variable_attr(): Bad array reference"); |
6de9cd9a DN |
2606 | } |
2607 | ||
2608 | break; | |
2609 | ||
2610 | case REF_COMPONENT: | |
cf2b3c22 TB |
2611 | comp = ref->u.c.component; |
2612 | attr = comp->attr; | |
a5fbc2f3 | 2613 | if (ts != NULL && !has_inquiry_part) |
e8a25349 | 2614 | { |
cf2b3c22 | 2615 | *ts = comp->ts; |
e8a25349 TS |
2616 | /* Don't set the string length if a substring reference |
2617 | follows. */ | |
2618 | if (ts->type == BT_CHARACTER | |
2619 | && ref->next && ref->next->type == REF_SUBSTRING) | |
bc21d315 | 2620 | ts->u.cl = NULL; |
e8a25349 | 2621 | } |
6de9cd9a | 2622 | |
cf2b3c22 TB |
2623 | if (comp->ts.type == BT_CLASS) |
2624 | { | |
83ba23b7 | 2625 | codimension = CLASS_DATA (comp)->attr.codimension; |
d40477b4 | 2626 | pointer = CLASS_DATA (comp)->attr.class_pointer; |
7a08eda1 | 2627 | allocatable = CLASS_DATA (comp)->attr.allocatable; |
cf2b3c22 TB |
2628 | } |
2629 | else | |
2630 | { | |
83ba23b7 | 2631 | codimension = comp->attr.codimension; |
cf2b3c22 TB |
2632 | pointer = comp->attr.pointer; |
2633 | allocatable = comp->attr.allocatable; | |
2634 | } | |
713485cc | 2635 | if (pointer || attr.proc_pointer) |
6de9cd9a DN |
2636 | target = 1; |
2637 | ||
2638 | break; | |
2639 | ||
a5fbc2f3 | 2640 | case REF_INQUIRY: |
6de9cd9a | 2641 | case REF_SUBSTRING: |
5046aff5 | 2642 | allocatable = pointer = 0; |
6de9cd9a DN |
2643 | break; |
2644 | } | |
2645 | ||
2646 | attr.dimension = dimension; | |
83ba23b7 | 2647 | attr.codimension = codimension; |
6de9cd9a | 2648 | attr.pointer = pointer; |
5046aff5 | 2649 | attr.allocatable = allocatable; |
6de9cd9a | 2650 | attr.target = target; |
80f95228 | 2651 | attr.save = sym->attr.save; |
6de9cd9a DN |
2652 | |
2653 | return attr; | |
2654 | } | |
2655 | ||
2656 | ||
2657 | /* Return the attribute from a general expression. */ | |
2658 | ||
2659 | symbol_attribute | |
edf1eac2 | 2660 | gfc_expr_attr (gfc_expr *e) |
6de9cd9a DN |
2661 | { |
2662 | symbol_attribute attr; | |
2663 | ||
2664 | switch (e->expr_type) | |
2665 | { | |
2666 | case EXPR_VARIABLE: | |
2667 | attr = gfc_variable_attr (e, NULL); | |
2668 | break; | |
2669 | ||
2670 | case EXPR_FUNCTION: | |
2671 | gfc_clear_attr (&attr); | |
2672 | ||
50c7654b | 2673 | if (e->value.function.esym && e->value.function.esym->result) |
cf2b3c22 TB |
2674 | { |
2675 | gfc_symbol *sym = e->value.function.esym->result; | |
2676 | attr = sym->attr; | |
2677 | if (sym->ts.type == BT_CLASS) | |
2678 | { | |
7a08eda1 | 2679 | attr.dimension = CLASS_DATA (sym)->attr.dimension; |
d40477b4 | 2680 | attr.pointer = CLASS_DATA (sym)->attr.class_pointer; |
7a08eda1 | 2681 | attr.allocatable = CLASS_DATA (sym)->attr.allocatable; |
cf2b3c22 TB |
2682 | } |
2683 | } | |
574284e9 AV |
2684 | else if (e->value.function.isym |
2685 | && e->value.function.isym->transformational | |
2686 | && e->ts.type == BT_CLASS) | |
2687 | attr = CLASS_DATA (e)->attr; | |
50dbf0b4 JW |
2688 | else |
2689 | attr = gfc_variable_attr (e, NULL); | |
6de9cd9a DN |
2690 | |
2691 | /* TODO: NULL() returns pointers. May have to take care of this | |
edf1eac2 | 2692 | here. */ |
6de9cd9a DN |
2693 | |
2694 | break; | |
2695 | ||
2696 | default: | |
3c9f5092 AV |
2697 | gfc_clear_attr (&attr); |
2698 | break; | |
2699 | } | |
2700 | ||
2701 | return attr; | |
2702 | } | |
2703 | ||
2704 | ||
2705 | /* Given an expression, figure out what the ultimate expression | |
2706 | attribute is. This routine is similar to gfc_variable_attr with | |
2707 | parts of gfc_expr_attr, but focuses more on the needs of | |
2708 | coarrays. For coarrays a codimension attribute is kind of | |
ba85c8c3 AV |
2709 | "infectious" being propagated once set and never cleared. |
2710 | The coarray_comp is only set, when the expression refs a coarray | |
2711 | component. REFS_COMP is set when present to true only, when this EXPR | |
2712 | refs a (non-_data) component. To check whether EXPR refs an allocatable | |
2713 | component in a derived type coarray *refs_comp needs to be set and | |
2714 | coarray_comp has to false. */ | |
3c9f5092 AV |
2715 | |
2716 | static symbol_attribute | |
ba85c8c3 | 2717 | caf_variable_attr (gfc_expr *expr, bool in_allocate, bool *refs_comp) |
3c9f5092 | 2718 | { |
de91486c | 2719 | int dimension, codimension, pointer, allocatable, target, coarray_comp; |
3c9f5092 AV |
2720 | symbol_attribute attr; |
2721 | gfc_ref *ref; | |
2722 | gfc_symbol *sym; | |
2723 | gfc_component *comp; | |
2724 | ||
2725 | if (expr->expr_type != EXPR_VARIABLE && expr->expr_type != EXPR_FUNCTION) | |
2726 | gfc_internal_error ("gfc_caf_attr(): Expression isn't a variable"); | |
2727 | ||
2728 | sym = expr->symtree->n.sym; | |
2729 | gfc_clear_attr (&attr); | |
2730 | ||
ba85c8c3 | 2731 | if (refs_comp) |
525a5e33 | 2732 | *refs_comp = false; |
ba85c8c3 | 2733 | |
3c9f5092 AV |
2734 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok) |
2735 | { | |
2736 | dimension = CLASS_DATA (sym)->attr.dimension; | |
2737 | codimension = CLASS_DATA (sym)->attr.codimension; | |
2738 | pointer = CLASS_DATA (sym)->attr.class_pointer; | |
2739 | allocatable = CLASS_DATA (sym)->attr.allocatable; | |
de91486c AV |
2740 | attr.alloc_comp = CLASS_DATA (sym)->ts.u.derived->attr.alloc_comp; |
2741 | attr.pointer_comp = CLASS_DATA (sym)->ts.u.derived->attr.pointer_comp; | |
3c9f5092 AV |
2742 | } |
2743 | else | |
2744 | { | |
2745 | dimension = sym->attr.dimension; | |
2746 | codimension = sym->attr.codimension; | |
2747 | pointer = sym->attr.pointer; | |
2748 | allocatable = sym->attr.allocatable; | |
de91486c | 2749 | attr.alloc_comp = sym->ts.type == BT_DERIVED |
3c9f5092 | 2750 | ? sym->ts.u.derived->attr.alloc_comp : 0; |
de91486c AV |
2751 | attr.pointer_comp = sym->ts.type == BT_DERIVED |
2752 | ? sym->ts.u.derived->attr.pointer_comp : 0; | |
3c9f5092 AV |
2753 | } |
2754 | ||
ba85c8c3 | 2755 | target = coarray_comp = 0; |
3c9f5092 AV |
2756 | if (pointer || attr.proc_pointer) |
2757 | target = 1; | |
2758 | ||
2759 | for (ref = expr->ref; ref; ref = ref->next) | |
2760 | switch (ref->type) | |
2761 | { | |
2762 | case REF_ARRAY: | |
2763 | ||
2764 | switch (ref->u.ar.type) | |
2765 | { | |
2766 | case AR_FULL: | |
2767 | case AR_SECTION: | |
2768 | dimension = 1; | |
2769 | break; | |
2770 | ||
2771 | case AR_ELEMENT: | |
2772 | /* Handle coarrays. */ | |
2773 | if (ref->u.ar.dimen > 0 && !in_allocate) | |
2774 | allocatable = pointer = 0; | |
2775 | break; | |
2776 | ||
2777 | case AR_UNKNOWN: | |
2778 | /* If any of start, end or stride is not integer, there will | |
2779 | already have been an error issued. */ | |
2780 | int errors; | |
2781 | gfc_get_errors (NULL, &errors); | |
2782 | if (errors == 0) | |
2783 | gfc_internal_error ("gfc_caf_attr(): Bad array reference"); | |
2784 | } | |
2785 | ||
2786 | break; | |
2787 | ||
2788 | case REF_COMPONENT: | |
2789 | comp = ref->u.c.component; | |
2790 | ||
2791 | if (comp->ts.type == BT_CLASS) | |
2792 | { | |
ba85c8c3 AV |
2793 | /* Set coarray_comp only, when this component introduces the |
2794 | coarray. */ | |
2795 | coarray_comp = !codimension && CLASS_DATA (comp)->attr.codimension; | |
3c9f5092 AV |
2796 | codimension |= CLASS_DATA (comp)->attr.codimension; |
2797 | pointer = CLASS_DATA (comp)->attr.class_pointer; | |
2798 | allocatable = CLASS_DATA (comp)->attr.allocatable; | |
3c9f5092 AV |
2799 | } |
2800 | else | |
2801 | { | |
ba85c8c3 AV |
2802 | /* Set coarray_comp only, when this component introduces the |
2803 | coarray. */ | |
2804 | coarray_comp = !codimension && comp->attr.codimension; | |
3c9f5092 AV |
2805 | codimension |= comp->attr.codimension; |
2806 | pointer = comp->attr.pointer; | |
2807 | allocatable = comp->attr.allocatable; | |
3c9f5092 AV |
2808 | } |
2809 | ||
525a5e33 AV |
2810 | if (refs_comp && strcmp (comp->name, "_data") != 0 |
2811 | && (ref->next == NULL | |
2812 | || (ref->next->type == REF_ARRAY && ref->next->next == NULL))) | |
2813 | *refs_comp = true; | |
ba85c8c3 | 2814 | |
3c9f5092 AV |
2815 | if (pointer || attr.proc_pointer) |
2816 | target = 1; | |
2817 | ||
2818 | break; | |
2819 | ||
2820 | case REF_SUBSTRING: | |
a5fbc2f3 | 2821 | case REF_INQUIRY: |
3c9f5092 AV |
2822 | allocatable = pointer = 0; |
2823 | break; | |
2824 | } | |
2825 | ||
2826 | attr.dimension = dimension; | |
2827 | attr.codimension = codimension; | |
2828 | attr.pointer = pointer; | |
2829 | attr.allocatable = allocatable; | |
2830 | attr.target = target; | |
2831 | attr.save = sym->attr.save; | |
2832 | attr.coarray_comp = coarray_comp; | |
3c9f5092 AV |
2833 | |
2834 | return attr; | |
2835 | } | |
2836 | ||
2837 | ||
2838 | symbol_attribute | |
ba85c8c3 | 2839 | gfc_caf_attr (gfc_expr *e, bool in_allocate, bool *refs_comp) |
3c9f5092 AV |
2840 | { |
2841 | symbol_attribute attr; | |
2842 | ||
2843 | switch (e->expr_type) | |
2844 | { | |
2845 | case EXPR_VARIABLE: | |
ba85c8c3 | 2846 | attr = caf_variable_attr (e, in_allocate, refs_comp); |
3c9f5092 AV |
2847 | break; |
2848 | ||
2849 | case EXPR_FUNCTION: | |
2850 | gfc_clear_attr (&attr); | |
2851 | ||
2852 | if (e->value.function.esym && e->value.function.esym->result) | |
2853 | { | |
2854 | gfc_symbol *sym = e->value.function.esym->result; | |
2855 | attr = sym->attr; | |
2856 | if (sym->ts.type == BT_CLASS) | |
2857 | { | |
2858 | attr.dimension = CLASS_DATA (sym)->attr.dimension; | |
2859 | attr.pointer = CLASS_DATA (sym)->attr.class_pointer; | |
2860 | attr.allocatable = CLASS_DATA (sym)->attr.allocatable; | |
2861 | attr.alloc_comp = CLASS_DATA (sym)->ts.u.derived->attr.alloc_comp; | |
de91486c AV |
2862 | attr.pointer_comp = CLASS_DATA (sym)->ts.u.derived |
2863 | ->attr.pointer_comp; | |
3c9f5092 AV |
2864 | } |
2865 | } | |
2866 | else if (e->symtree) | |
ba85c8c3 | 2867 | attr = caf_variable_attr (e, in_allocate, refs_comp); |
3c9f5092 AV |
2868 | else |
2869 | gfc_clear_attr (&attr); | |
2870 | break; | |
2871 | ||
2872 | default: | |
6de9cd9a DN |
2873 | gfc_clear_attr (&attr); |
2874 | break; | |
2875 | } | |
2876 | ||
2877 | return attr; | |
2878 | } | |
2879 | ||
2880 | ||
2881 | /* Match a structure constructor. The initial symbol has already been | |
2882 | seen. */ | |
2883 | ||
fa9290d3 DK |
2884 | typedef struct gfc_structure_ctor_component |
2885 | { | |
2886 | char* name; | |
2887 | gfc_expr* val; | |
2888 | locus where; | |
2889 | struct gfc_structure_ctor_component* next; | |
2890 | } | |
2891 | gfc_structure_ctor_component; | |
2892 | ||
ece3f663 | 2893 | #define gfc_get_structure_ctor_component() XCNEW (gfc_structure_ctor_component) |
fa9290d3 DK |
2894 | |
2895 | static void | |
2896 | gfc_free_structure_ctor_component (gfc_structure_ctor_component *comp) | |
2897 | { | |
cede9502 | 2898 | free (comp->name); |
fa9290d3 | 2899 | gfc_free_expr (comp->val); |
cede9502 | 2900 | free (comp); |
fa9290d3 DK |
2901 | } |
2902 | ||
7d1f1e61 PT |
2903 | |
2904 | /* Translate the component list into the actual constructor by sorting it in | |
2905 | the order required; this also checks along the way that each and every | |
2906 | component actually has an initializer and handles default initializers | |
2907 | for components without explicit value given. */ | |
524af0d6 | 2908 | static bool |
7d1f1e61 | 2909 | build_actual_constructor (gfc_structure_ctor_component **comp_head, |
b7e75771 | 2910 | gfc_constructor_base *ctor_head, gfc_symbol *sym) |
6de9cd9a | 2911 | { |
fa9290d3 | 2912 | gfc_structure_ctor_component *comp_iter; |
7d1f1e61 PT |
2913 | gfc_component *comp; |
2914 | ||
2915 | for (comp = sym->components; comp; comp = comp->next) | |
2916 | { | |
2917 | gfc_structure_ctor_component **next_ptr; | |
2918 | gfc_expr *value = NULL; | |
2919 | ||
2920 | /* Try to find the initializer for the current component by name. */ | |
2921 | next_ptr = comp_head; | |
2922 | for (comp_iter = *comp_head; comp_iter; comp_iter = comp_iter->next) | |
2923 | { | |
2924 | if (!strcmp (comp_iter->name, comp->name)) | |
2925 | break; | |
2926 | next_ptr = &comp_iter->next; | |
2927 | } | |
2928 | ||
2929 | /* If an extension, try building the parent derived type by building | |
2930 | a value expression for the parent derived type and calling self. */ | |
2931 | if (!comp_iter && comp == sym->components && sym->attr.extension) | |
2932 | { | |
b7e75771 JD |
2933 | value = gfc_get_structure_constructor_expr (comp->ts.type, |
2934 | comp->ts.kind, | |
2935 | &gfc_current_locus); | |
7d1f1e61 | 2936 | value->ts = comp->ts; |
7d1f1e61 | 2937 | |
bf1b77dd PT |
2938 | if (!build_actual_constructor (comp_head, |
2939 | &value->value.constructor, | |
524af0d6 | 2940 | comp->ts.u.derived)) |
7d1f1e61 PT |
2941 | { |
2942 | gfc_free_expr (value); | |
524af0d6 | 2943 | return false; |
7d1f1e61 | 2944 | } |
b7e75771 JD |
2945 | |
2946 | gfc_constructor_append_expr (ctor_head, value, NULL); | |
7d1f1e61 PT |
2947 | continue; |
2948 | } | |
2949 | ||
2950 | /* If it was not found, try the default initializer if there's any; | |
2b3dc0db | 2951 | otherwise, it's an error unless this is a deferred parameter. */ |
7d1f1e61 PT |
2952 | if (!comp_iter) |
2953 | { | |
2954 | if (comp->initializer) | |
2955 | { | |
524af0d6 JB |
2956 | if (!gfc_notify_std (GFC_STD_F2003, "Structure constructor " |
2957 | "with missing optional arguments at %C")) | |
2958 | return false; | |
7d1f1e61 PT |
2959 | value = gfc_copy_expr (comp->initializer); |
2960 | } | |
9b548517 AV |
2961 | else if (comp->attr.allocatable |
2962 | || (comp->ts.type == BT_CLASS | |
2963 | && CLASS_DATA (comp)->attr.allocatable)) | |
7430df97 JW |
2964 | { |
2965 | if (!gfc_notify_std (GFC_STD_F2008, "No initializer for " | |
2f029c08 | 2966 | "allocatable component %qs given in the " |
9b548517 | 2967 | "structure constructor at %C", comp->name)) |
7430df97 JW |
2968 | return false; |
2969 | } | |
9b548517 | 2970 | else if (!comp->attr.artificial) |
7d1f1e61 | 2971 | { |
a4d9b221 | 2972 | gfc_error ("No initializer for component %qs given in the" |
546c8974 | 2973 | " structure constructor at %C", comp->name); |
524af0d6 | 2974 | return false; |
7d1f1e61 PT |
2975 | } |
2976 | } | |
2977 | else | |
2978 | value = comp_iter->val; | |
2979 | ||
2980 | /* Add the value to the constructor chain built. */ | |
b7e75771 | 2981 | gfc_constructor_append_expr (ctor_head, value, NULL); |
7d1f1e61 PT |
2982 | |
2983 | /* Remove the entry from the component list. We don't want the expression | |
2984 | value to be free'd, so set it to NULL. */ | |
2985 | if (comp_iter) | |
2986 | { | |
2987 | *next_ptr = comp_iter->next; | |
2988 | comp_iter->val = NULL; | |
2989 | gfc_free_structure_ctor_component (comp_iter); | |
2990 | } | |
2991 | } | |
524af0d6 | 2992 | return true; |
7d1f1e61 PT |
2993 | } |
2994 | ||
c3f34952 | 2995 | |
524af0d6 | 2996 | bool |
c3f34952 TB |
2997 | gfc_convert_to_structure_constructor (gfc_expr *e, gfc_symbol *sym, gfc_expr **cexpr, |
2998 | gfc_actual_arglist **arglist, | |
2999 | bool parent) | |
7d1f1e61 | 3000 | { |
c3f34952 | 3001 | gfc_actual_arglist *actual; |
7d1f1e61 | 3002 | gfc_structure_ctor_component *comp_tail, *comp_head, *comp_iter; |
b7e75771 | 3003 | gfc_constructor_base ctor_head = NULL; |
fa9290d3 | 3004 | gfc_component *comp; /* Is set NULL when named component is first seen */ |
fa9290d3 | 3005 | const char* last_name = NULL; |
c3f34952 TB |
3006 | locus old_locus; |
3007 | gfc_expr *expr; | |
6de9cd9a | 3008 | |
c3f34952 TB |
3009 | expr = parent ? *cexpr : e; |
3010 | old_locus = gfc_current_locus; | |
3011 | if (parent) | |
3012 | ; /* gfc_current_locus = *arglist->expr ? ->where;*/ | |
3013 | else | |
3014 | gfc_current_locus = expr->where; | |
6de9cd9a | 3015 | |
c3f34952 | 3016 | comp_tail = comp_head = NULL; |
6de9cd9a | 3017 | |
52f49934 DK |
3018 | if (!parent && sym->attr.abstract) |
3019 | { | |
1fe61adf | 3020 | gfc_error ("Cannot construct ABSTRACT type %qs at %L", |
c3f34952 TB |
3021 | sym->name, &expr->where); |
3022 | goto cleanup; | |
52f49934 DK |
3023 | } |
3024 | ||
c3f34952 TB |
3025 | comp = sym->components; |
3026 | actual = parent ? *arglist : expr->value.function.actual; | |
3027 | for ( ; actual; ) | |
6de9cd9a | 3028 | { |
c3f34952 | 3029 | gfc_component *this_comp = NULL; |
6de9cd9a | 3030 | |
c3f34952 TB |
3031 | if (!comp_head) |
3032 | comp_tail = comp_head = gfc_get_structure_ctor_component (); | |
3033 | else | |
3034 | { | |
3035 | comp_tail->next = gfc_get_structure_ctor_component (); | |
3036 | comp_tail = comp_tail->next; | |
3037 | } | |
3038 | if (actual->name) | |
3039 | { | |
524af0d6 JB |
3040 | if (!gfc_notify_std (GFC_STD_F2003, "Structure" |
3041 | " constructor with named arguments at %C")) | |
c3f34952 | 3042 | goto cleanup; |
6de9cd9a | 3043 | |
c3f34952 TB |
3044 | comp_tail->name = xstrdup (actual->name); |
3045 | last_name = comp_tail->name; | |
3046 | comp = NULL; | |
3047 | } | |
3048 | else | |
3049 | { | |
3050 | /* Components without name are not allowed after the first named | |
3051 | component initializer! */ | |
9b548517 | 3052 | if (!comp || comp->attr.artificial) |
fa9290d3 | 3053 | { |
c3f34952 TB |
3054 | if (last_name) |
3055 | gfc_error ("Component initializer without name after component" | |
546c8974 | 3056 | " named %s at %L", last_name, |
c3f34952 TB |
3057 | actual->expr ? &actual->expr->where |
3058 | : &gfc_current_locus); | |
3059 | else | |
3060 | gfc_error ("Too many components in structure constructor at " | |
546c8974 DM |
3061 | "%L", actual->expr ? &actual->expr->where |
3062 | : &gfc_current_locus); | |
c3f34952 | 3063 | goto cleanup; |
fa9290d3 | 3064 | } |
fa9290d3 | 3065 | |
c3f34952 TB |
3066 | comp_tail->name = xstrdup (comp->name); |
3067 | } | |
fa9290d3 | 3068 | |
c3f34952 | 3069 | /* Find the current component in the structure definition and check |
9d1210f4 | 3070 | its access is not private. */ |
c3f34952 | 3071 | if (comp) |
f6288c24 | 3072 | this_comp = gfc_find_component (sym, comp->name, false, false, NULL); |
c3f34952 TB |
3073 | else |
3074 | { | |
3075 | this_comp = gfc_find_component (sym, (const char *)comp_tail->name, | |
f6288c24 | 3076 | false, false, NULL); |
c3f34952 TB |
3077 | comp = NULL; /* Reset needed! */ |
3078 | } | |
6de9cd9a | 3079 | |
c3f34952 TB |
3080 | /* Here we can check if a component name is given which does not |
3081 | correspond to any component of the defined structure. */ | |
3082 | if (!this_comp) | |
3083 | goto cleanup; | |
fa9290d3 | 3084 | |
04946c6b TK |
3085 | /* For a constant string constructor, make sure the length is |
3086 | correct; truncate of fill with blanks if needed. */ | |
3087 | if (this_comp->ts.type == BT_CHARACTER && !this_comp->attr.allocatable | |
3088 | && this_comp->ts.u.cl && this_comp->ts.u.cl->length | |
3089 | && this_comp->ts.u.cl->length->expr_type == EXPR_CONSTANT | |
13a7688f | 3090 | && actual->expr->ts.type == BT_CHARACTER |
04946c6b TK |
3091 | && actual->expr->expr_type == EXPR_CONSTANT) |
3092 | { | |
3093 | ptrdiff_t c, e; | |
3094 | c = gfc_mpz_get_hwi (this_comp->ts.u.cl->length->value.integer); | |
3095 | e = actual->expr->value.character.length; | |
3096 | ||
3097 | if (c != e) | |
3098 | { | |
3099 | ptrdiff_t i, to; | |
3100 | gfc_char_t *dest; | |
3101 | dest = gfc_get_wide_string (c + 1); | |
3102 | ||
3103 | to = e < c ? e : c; | |
3104 | for (i = 0; i < to; i++) | |
3105 | dest[i] = actual->expr->value.character.string[i]; | |
a5fbc2f3 | 3106 | |
04946c6b TK |
3107 | for (i = e; i < c; i++) |
3108 | dest[i] = ' '; | |
3109 | ||
3110 | dest[c] = '\0'; | |
3111 | free (actual->expr->value.character.string); | |
3112 | ||
3113 | actual->expr->value.character.length = c; | |
3114 | actual->expr->value.character.string = dest; | |
cf015ca2 TK |
3115 | |
3116 | if (warn_line_truncation && c < e) | |
3117 | gfc_warning_now (OPT_Wcharacter_truncation, | |
3118 | "CHARACTER expression will be truncated " | |
3119 | "in constructor (%ld/%ld) at %L", (long int) c, | |
3120 | (long int) e, &actual->expr->where); | |
04946c6b TK |
3121 | } |
3122 | } | |
3123 | ||
c3f34952 TB |
3124 | comp_tail->val = actual->expr; |
3125 | if (actual->expr != NULL) | |
3126 | comp_tail->where = actual->expr->where; | |
3127 | actual->expr = NULL; | |
fa9290d3 | 3128 | |
c3f34952 | 3129 | /* Check if this component is already given a value. */ |
bf1b77dd | 3130 | for (comp_iter = comp_head; comp_iter != comp_tail; |
c3f34952 TB |
3131 | comp_iter = comp_iter->next) |
3132 | { | |
3133 | gcc_assert (comp_iter); | |
3134 | if (!strcmp (comp_iter->name, comp_tail->name)) | |
d3a9eea2 | 3135 | { |
c4100eae | 3136 | gfc_error ("Component %qs is initialized twice in the structure" |
546c8974 | 3137 | " constructor at %L", comp_tail->name, |
c3f34952 TB |
3138 | comp_tail->val ? &comp_tail->where |
3139 | : &gfc_current_locus); | |
d3a9eea2 | 3140 | goto cleanup; |
c3f34952 TB |
3141 | } |
3142 | } | |
d3a9eea2 | 3143 | |
c3f34952 TB |
3144 | /* F2008, R457/C725, for PURE C1283. */ |
3145 | if (this_comp->attr.pointer && comp_tail->val | |
3146 | && gfc_is_coindexed (comp_tail->val)) | |
3147 | { | |
a4d9b221 | 3148 | gfc_error ("Coindexed expression to pointer component %qs in " |
546c8974 | 3149 | "structure constructor at %L", comp_tail->name, |
c3f34952 TB |
3150 | &comp_tail->where); |
3151 | goto cleanup; | |
3152 | } | |
d3a9eea2 | 3153 | |
c3f34952 TB |
3154 | /* If not explicitly a parent constructor, gather up the components |
3155 | and build one. */ | |
3156 | if (comp && comp == sym->components | |
3157 | && sym->attr.extension | |
3158 | && comp_tail->val | |
f6288c24 | 3159 | && (!gfc_bt_struct (comp_tail->val->ts.type) |
c3f34952 TB |
3160 | || |
3161 | comp_tail->val->ts.u.derived != this_comp->ts.u.derived)) | |
3162 | { | |
524af0d6 | 3163 | bool m; |
c3f34952 | 3164 | gfc_actual_arglist *arg_null = NULL; |
6de9cd9a | 3165 | |
c3f34952 TB |
3166 | actual->expr = comp_tail->val; |
3167 | comp_tail->val = NULL; | |
6de9cd9a | 3168 | |
c3f34952 TB |
3169 | m = gfc_convert_to_structure_constructor (NULL, |
3170 | comp->ts.u.derived, &comp_tail->val, | |
3171 | comp->ts.u.derived->attr.zero_comp | |
3172 | ? &arg_null : &actual, true); | |
524af0d6 | 3173 | if (!m) |
c3f34952 | 3174 | goto cleanup; |
2eae3dc7 | 3175 | |
c3f34952 TB |
3176 | if (comp->ts.u.derived->attr.zero_comp) |
3177 | { | |
3178 | comp = comp->next; | |
3179 | continue; | |
3180 | } | |
3181 | } | |
fa9290d3 | 3182 | |
c3f34952 TB |
3183 | if (comp) |
3184 | comp = comp->next; | |
3185 | if (parent && !comp) | |
3186 | break; | |
fa9290d3 | 3187 | |
792f7301 MM |
3188 | if (actual) |
3189 | actual = actual->next; | |
6de9cd9a DN |
3190 | } |
3191 | ||
524af0d6 | 3192 | if (!build_actual_constructor (&comp_head, &ctor_head, sym)) |
7d1f1e61 PT |
3193 | goto cleanup; |
3194 | ||
fa9290d3 DK |
3195 | /* No component should be left, as this should have caused an error in the |
3196 | loop constructing the component-list (name that does not correspond to any | |
3197 | component in the structure definition). */ | |
c3f34952 | 3198 | if (comp_head && sym->attr.extension) |
7d1f1e61 PT |
3199 | { |
3200 | for (comp_iter = comp_head; comp_iter; comp_iter = comp_iter->next) | |
3201 | { | |
a4d9b221 | 3202 | gfc_error ("component %qs at %L has already been set by a " |
7d1f1e61 PT |
3203 | "parent derived type constructor", comp_iter->name, |
3204 | &comp_iter->where); | |
3205 | } | |
3206 | goto cleanup; | |
3207 | } | |
c3f34952 TB |
3208 | else |
3209 | gcc_assert (!comp_head); | |
fa9290d3 | 3210 | |
c3f34952 TB |
3211 | if (parent) |
3212 | { | |
3213 | expr = gfc_get_structure_constructor_expr (BT_DERIVED, 0, &gfc_current_locus); | |
3214 | expr->ts.u.derived = sym; | |
3215 | expr->value.constructor = ctor_head; | |
3216 | *cexpr = expr; | |
3217 | } | |
3218 | else | |
3219 | { | |
3220 | expr->ts.u.derived = sym; | |
3221 | expr->ts.kind = 0; | |
3222 | expr->ts.type = BT_DERIVED; | |
3223 | expr->value.constructor = ctor_head; | |
3224 | expr->expr_type = EXPR_STRUCTURE; | |
3225 | } | |
6de9cd9a | 3226 | |
bf1b77dd | 3227 | gfc_current_locus = old_locus; |
c3f34952 TB |
3228 | if (parent) |
3229 | *arglist = actual; | |
524af0d6 | 3230 | return true; |
6de9cd9a | 3231 | |
c3f34952 | 3232 | cleanup: |
bf1b77dd | 3233 | gfc_current_locus = old_locus; |
6de9cd9a | 3234 | |
fa9290d3 DK |
3235 | for (comp_iter = comp_head; comp_iter; ) |
3236 | { | |
3237 | gfc_structure_ctor_component *next = comp_iter->next; | |
3238 | gfc_free_structure_ctor_component (comp_iter); | |
3239 | comp_iter = next; | |
3240 | } | |
b7e75771 | 3241 | gfc_constructor_free (ctor_head); |
c3f34952 | 3242 | |
524af0d6 | 3243 | return false; |
c3f34952 TB |
3244 | } |
3245 | ||
3246 | ||
3247 | match | |
3248 | gfc_match_structure_constructor (gfc_symbol *sym, gfc_expr **result) | |
3249 | { | |
3250 | match m; | |
3251 | gfc_expr *e; | |
3252 | gfc_symtree *symtree; | |
3253 | ||
b64c3d06 | 3254 | gfc_get_ha_sym_tree (sym->name, &symtree); |
c3f34952 TB |
3255 | |
3256 | e = gfc_get_expr (); | |
3257 | e->symtree = symtree; | |
3258 | e->expr_type = EXPR_FUNCTION; | |
2f00fb3d | 3259 | e->where = gfc_current_locus; |
c3f34952 | 3260 | |
f6288c24 | 3261 | gcc_assert (gfc_fl_struct (sym->attr.flavor) |
c3f34952 TB |
3262 | && symtree->n.sym->attr.flavor == FL_PROCEDURE); |
3263 | e->value.function.esym = sym; | |
3264 | e->symtree->n.sym->attr.generic = 1; | |
3265 | ||
49032565 SK |
3266 | m = gfc_match_actual_arglist (0, &e->value.function.actual); |
3267 | if (m != MATCH_YES) | |
3268 | { | |
3269 | gfc_free_expr (e); | |
3270 | return m; | |
3271 | } | |
3272 | ||
3273 | if (!gfc_convert_to_structure_constructor (e, sym, NULL, NULL, false)) | |
3274 | { | |
3275 | gfc_free_expr (e); | |
3276 | return MATCH_ERROR; | |
3277 | } | |
3278 | ||
586dc38b SK |
3279 | /* If a structure constructor is in a DATA statement, then each entity |
3280 | in the structure constructor must be a constant. Try to reduce the | |
3281 | expression here. */ | |
3282 | if (gfc_in_match_data ()) | |
3283 | gfc_reduce_init_expr (e); | |
5bab4c96 | 3284 | |
49032565 SK |
3285 | *result = e; |
3286 | return MATCH_YES; | |
6de9cd9a DN |
3287 | } |
3288 | ||
3289 | ||
9a3db5a3 PT |
3290 | /* If the symbol is an implicit do loop index and implicitly typed, |
3291 | it should not be host associated. Provide a symtree from the | |
3292 | current namespace. */ | |
3293 | static match | |
3294 | check_for_implicit_index (gfc_symtree **st, gfc_symbol **sym) | |
3295 | { | |
3296 | if ((*sym)->attr.flavor == FL_VARIABLE | |
3297 | && (*sym)->ns != gfc_current_ns | |
3298 | && (*sym)->attr.implied_index | |
3299 | && (*sym)->attr.implicit_type | |
3300 | && !(*sym)->attr.use_assoc) | |
3301 | { | |
3302 | int i; | |
08a6b8e0 | 3303 | i = gfc_get_sym_tree ((*sym)->name, NULL, st, false); |
9a3db5a3 PT |
3304 | if (i) |
3305 | return MATCH_ERROR; | |
3306 | *sym = (*st)->n.sym; | |
3307 | } | |
3308 | return MATCH_YES; | |
3309 | } | |
3310 | ||
3311 | ||
3070bab4 JW |
3312 | /* Procedure pointer as function result: Replace the function symbol by the |
3313 | auto-generated hidden result variable named "ppr@". */ | |
3314 | ||
524af0d6 | 3315 | static bool |
3070bab4 JW |
3316 | replace_hidden_procptr_result (gfc_symbol **sym, gfc_symtree **st) |
3317 | { | |
3318 | /* Check for procedure pointer result variable. */ | |
3319 | if ((*sym)->attr.function && !(*sym)->attr.external | |
3320 | && (*sym)->result && (*sym)->result != *sym | |
3321 | && (*sym)->result->attr.proc_pointer | |
3322 | && (*sym) == gfc_current_ns->proc_name | |
3323 | && (*sym) == (*sym)->result->ns->proc_name | |
3324 | && strcmp ("ppr@", (*sym)->result->name) == 0) | |
3325 | { | |
3326 | /* Automatic replacement with "hidden" result variable. */ | |
3327 | (*sym)->result->attr.referenced = (*sym)->attr.referenced; | |
3328 | *sym = (*sym)->result; | |
3329 | *st = gfc_find_symtree ((*sym)->ns->sym_root, (*sym)->name); | |
524af0d6 | 3330 | return true; |
3070bab4 | 3331 | } |
524af0d6 | 3332 | return false; |
3070bab4 JW |
3333 | } |
3334 | ||
3335 | ||
6de9cd9a DN |
3336 | /* Matches a variable name followed by anything that might follow it-- |
3337 | array reference, argument list of a function, etc. */ | |
3338 | ||
3339 | match | |
edf1eac2 | 3340 | gfc_match_rvalue (gfc_expr **result) |
6de9cd9a DN |
3341 | { |
3342 | gfc_actual_arglist *actual_arglist; | |
d3fcc995 | 3343 | char name[GFC_MAX_SYMBOL_LEN + 1], argname[GFC_MAX_SYMBOL_LEN + 1]; |
6de9cd9a DN |
3344 | gfc_state_data *st; |
3345 | gfc_symbol *sym; | |
3346 | gfc_symtree *symtree; | |
d3fcc995 | 3347 | locus where, old_loc; |
6de9cd9a | 3348 | gfc_expr *e; |
d3fcc995 | 3349 | match m, m2; |
6de9cd9a | 3350 | int i; |
5270c302 AL |
3351 | gfc_typespec *ts; |
3352 | bool implicit_char; | |
a99288e5 | 3353 | gfc_ref *ref; |
6de9cd9a | 3354 | |
cd714e1e FR |
3355 | m = gfc_match ("%%loc"); |
3356 | if (m == MATCH_YES) | |
3357 | { | |
3358 | if (!gfc_notify_std (GFC_STD_LEGACY, "%%LOC() as an rvalue at %C")) | |
3359 | return MATCH_ERROR; | |
3360 | strncpy (name, "loc", 4); | |
3361 | } | |
3362 | ||
3363 | else | |
3364 | { | |
3365 | m = gfc_match_name (name); | |
3366 | if (m != MATCH_YES) | |
3367 | return m; | |
3368 | } | |
6de9cd9a | 3369 | |
f6288c24 FR |
3370 | /* Check if the symbol exists. */ |
3371 | if (gfc_find_sym_tree (name, NULL, 1, &symtree)) | |
6de9cd9a DN |
3372 | return MATCH_ERROR; |
3373 | ||
f6288c24 FR |
3374 | /* If the symbol doesn't exist, create it unless the name matches a FL_STRUCT |
3375 | type. For derived types we create a generic symbol which links to the | |
3376 | derived type symbol; STRUCTUREs are simpler and must not conflict with | |
3377 | variables. */ | |
3378 | if (!symtree) | |
3379 | if (gfc_find_sym_tree (gfc_dt_upper_string (name), NULL, 1, &symtree)) | |
3380 | return MATCH_ERROR; | |
3381 | if (!symtree || symtree->n.sym->attr.flavor != FL_STRUCT) | |
3382 | { | |
3383 | if (gfc_find_state (COMP_INTERFACE) | |
3384 | && !gfc_current_ns->has_import_set) | |
3385 | i = gfc_get_sym_tree (name, NULL, &symtree, false); | |
3386 | else | |
3387 | i = gfc_get_ha_sym_tree (name, &symtree); | |
3388 | if (i) | |
3389 | return MATCH_ERROR; | |
3390 | } | |
3391 | ||
3392 | ||
6de9cd9a DN |
3393 | sym = symtree->n.sym; |
3394 | e = NULL; | |
63645982 | 3395 | where = gfc_current_locus; |
6de9cd9a | 3396 | |
3070bab4 JW |
3397 | replace_hidden_procptr_result (&sym, &symtree); |
3398 | ||
9a3db5a3 PT |
3399 | /* If this is an implicit do loop index and implicitly typed, |
3400 | it should not be host associated. */ | |
3401 | m = check_for_implicit_index (&symtree, &sym); | |
3402 | if (m != MATCH_YES) | |
3403 | return m; | |
3404 | ||
6de9cd9a | 3405 | gfc_set_sym_referenced (sym); |
9a3db5a3 | 3406 | sym->attr.implied_index = 0; |
6de9cd9a | 3407 | |
0921bc44 JJ |
3408 | if (sym->attr.function && sym->result == sym) |
3409 | { | |
811849c0 PT |
3410 | /* See if this is a directly recursive function call. */ |
3411 | gfc_gobble_whitespace (); | |
3412 | if (sym->attr.recursive | |
8fc541d3 | 3413 | && gfc_peek_ascii_char () == '(' |
fc2d8680 PT |
3414 | && gfc_current_ns->proc_name == sym |
3415 | && !sym->attr.dimension) | |
811849c0 | 3416 | { |
a4d9b221 | 3417 | gfc_error ("%qs at %C is the name of a recursive function " |
fc2d8680 PT |
3418 | "and so refers to the result variable. Use an " |
3419 | "explicit RESULT variable for direct recursion " | |
3420 | "(12.5.2.1)", sym->name); | |
811849c0 PT |
3421 | return MATCH_ERROR; |
3422 | } | |
fc2d8680 | 3423 | |
2d71b918 | 3424 | if (gfc_is_function_return_value (sym, gfc_current_ns)) |
0921bc44 JJ |
3425 | goto variable; |
3426 | ||
3427 | if (sym->attr.entry | |
3428 | && (sym->ns == gfc_current_ns | |
3429 | || sym->ns == gfc_current_ns->parent)) | |
3430 | { | |
3431 | gfc_entry_list *el = NULL; | |
bf1b77dd | 3432 | |
0921bc44 JJ |
3433 | for (el = sym->ns->entries; el; el = el->next) |
3434 | if (sym == el->sym) | |
3435 | goto variable; | |
3436 | } | |
3437 | } | |
6de9cd9a | 3438 | |
8fb74da4 JW |
3439 | if (gfc_matching_procptr_assignment) |
3440 | goto procptr0; | |
3441 | ||
6de9cd9a DN |
3442 | if (sym->attr.function || sym->attr.external || sym->attr.intrinsic) |
3443 | goto function0; | |
3444 | ||
3445 | if (sym->attr.generic) | |
3446 | goto generic_function; | |
3447 | ||
3448 | switch (sym->attr.flavor) | |
3449 | { | |
3450 | case FL_VARIABLE: | |
3451 | variable: | |
6de9cd9a DN |
3452 | e = gfc_get_expr (); |
3453 | ||
3454 | e->expr_type = EXPR_VARIABLE; | |
3455 | e->symtree = symtree; | |
3456 | ||
713485cc | 3457 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3458 | break; |
3459 | ||
3460 | case FL_PARAMETER: | |
b7263e8f | 3461 | /* A statement of the form "REAL, parameter :: a(0:10) = 1" will |
bf1b77dd | 3462 | end up here. Unfortunately, sym->value->expr_type is set to |
b7263e8f EE |
3463 | EXPR_CONSTANT, and so the if () branch would be followed without |
3464 | the !sym->as check. */ | |
3465 | if (sym->value && sym->value->expr_type != EXPR_ARRAY && !sym->as) | |
6de9cd9a DN |
3466 | e = gfc_copy_expr (sym->value); |
3467 | else | |
3468 | { | |
3469 | e = gfc_get_expr (); | |
3470 | e->expr_type = EXPR_VARIABLE; | |
3471 | } | |
3472 | ||
3473 | e->symtree = symtree; | |
713485cc | 3474 | m = gfc_match_varspec (e, 0, false, true); |
a99288e5 PT |
3475 | |
3476 | if (sym->ts.is_c_interop || sym->ts.is_iso_c) | |
3477 | break; | |
3478 | ||
927171bf PT |
3479 | /* Variable array references to derived type parameters cause |
3480 | all sorts of headaches in simplification. Treating such | |
3481 | expressions as variable works just fine for all array | |
3482 | references. */ | |
3483 | if (sym->value && sym->ts.type == BT_DERIVED && e->ref) | |
a99288e5 PT |
3484 | { |
3485 | for (ref = e->ref; ref; ref = ref->next) | |
3486 | if (ref->type == REF_ARRAY) | |
3487 | break; | |
3488 | ||
927171bf | 3489 | if (ref == NULL || ref->u.ar.type == AR_FULL) |
a99288e5 PT |
3490 | break; |
3491 | ||
3492 | ref = e->ref; | |
3493 | e->ref = NULL; | |
3494 | gfc_free_expr (e); | |
3495 | e = gfc_get_expr (); | |
3496 | e->expr_type = EXPR_VARIABLE; | |
3497 | e->symtree = symtree; | |
3498 | e->ref = ref; | |
a99288e5 PT |
3499 | } |
3500 | ||
6de9cd9a DN |
3501 | break; |
3502 | ||
f6288c24 | 3503 | case FL_STRUCT: |
6de9cd9a DN |
3504 | case FL_DERIVED: |
3505 | sym = gfc_use_derived (sym); | |
3506 | if (sym == NULL) | |
3507 | m = MATCH_ERROR; | |
3508 | else | |
c3f34952 | 3509 | goto generic_function; |
6de9cd9a DN |
3510 | break; |
3511 | ||
3512 | /* If we're here, then the name is known to be the name of a | |
3513 | procedure, yet it is not sure to be the name of a function. */ | |
3514 | case FL_PROCEDURE: | |
8fb74da4 | 3515 | |
1cc0e193 | 3516 | /* Procedure Pointer Assignments. */ |
8fb74da4 JW |
3517 | procptr0: |
3518 | if (gfc_matching_procptr_assignment) | |
3519 | { | |
3520 | gfc_gobble_whitespace (); | |
e35bbb23 | 3521 | if (!sym->attr.dimension && gfc_peek_ascii_char () == '(') |
8fb74da4 JW |
3522 | /* Parse functions returning a procptr. */ |
3523 | goto function0; | |
3524 | ||
8fb74da4 JW |
3525 | e = gfc_get_expr (); |
3526 | e->expr_type = EXPR_VARIABLE; | |
3527 | e->symtree = symtree; | |
713485cc | 3528 | m = gfc_match_varspec (e, 0, false, true); |
2dda89a8 JW |
3529 | if (!e->ref && sym->attr.flavor == FL_UNKNOWN |
3530 | && sym->ts.type == BT_UNKNOWN | |
524af0d6 | 3531 | && !gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL)) |
2dda89a8 JW |
3532 | { |
3533 | m = MATCH_ERROR; | |
3534 | break; | |
3535 | } | |
8fb74da4 JW |
3536 | break; |
3537 | } | |
3538 | ||
6de9cd9a DN |
3539 | if (sym->attr.subroutine) |
3540 | { | |
a4d9b221 | 3541 | gfc_error ("Unexpected use of subroutine name %qs at %C", |
6de9cd9a DN |
3542 | sym->name); |
3543 | m = MATCH_ERROR; | |
3544 | break; | |
3545 | } | |
3546 | ||
3547 | /* At this point, the name has to be a non-statement function. | |
edf1eac2 SK |
3548 | If the name is the same as the current function being |
3549 | compiled, then we have a variable reference (to the function | |
3550 | result) if the name is non-recursive. */ | |
6de9cd9a DN |
3551 | |
3552 | st = gfc_enclosing_unit (NULL); | |
3553 | ||
4668d6f9 PT |
3554 | if (st != NULL |
3555 | && st->state == COMP_FUNCTION | |
6de9cd9a DN |
3556 | && st->sym == sym |
3557 | && !sym->attr.recursive) | |
3558 | { | |
3559 | e = gfc_get_expr (); | |
3560 | e->symtree = symtree; | |
3561 | e->expr_type = EXPR_VARIABLE; | |
3562 | ||
713485cc | 3563 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3564 | break; |
3565 | } | |
3566 | ||
3567 | /* Match a function reference. */ | |
3568 | function0: | |
3569 | m = gfc_match_actual_arglist (0, &actual_arglist); | |
3570 | if (m == MATCH_NO) | |
3571 | { | |
3572 | if (sym->attr.proc == PROC_ST_FUNCTION) | |
a4d9b221 | 3573 | gfc_error ("Statement function %qs requires argument list at %C", |
6de9cd9a DN |
3574 | sym->name); |
3575 | else | |
a4d9b221 | 3576 | gfc_error ("Function %qs requires an argument list at %C", |
6de9cd9a DN |
3577 | sym->name); |
3578 | ||
3579 | m = MATCH_ERROR; | |
3580 | break; | |
3581 | } | |
3582 | ||
3583 | if (m != MATCH_YES) | |
3584 | { | |
3585 | m = MATCH_ERROR; | |
3586 | break; | |
3587 | } | |
3588 | ||
3589 | gfc_get_ha_sym_tree (name, &symtree); /* Can't fail */ | |
3590 | sym = symtree->n.sym; | |
3591 | ||
3070bab4 JW |
3592 | replace_hidden_procptr_result (&sym, &symtree); |
3593 | ||
6de9cd9a DN |
3594 | e = gfc_get_expr (); |
3595 | e->symtree = symtree; | |
3596 | e->expr_type = EXPR_FUNCTION; | |
3597 | e->value.function.actual = actual_arglist; | |
63645982 | 3598 | e->where = gfc_current_locus; |
6de9cd9a | 3599 | |
102344e2 TB |
3600 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok |
3601 | && CLASS_DATA (sym)->as) | |
3602 | e->rank = CLASS_DATA (sym)->as->rank; | |
3603 | else if (sym->as != NULL) | |
6de9cd9a DN |
3604 | e->rank = sym->as->rank; |
3605 | ||
3606 | if (!sym->attr.function | |
524af0d6 | 3607 | && !gfc_add_function (&sym->attr, sym->name, NULL)) |
6de9cd9a DN |
3608 | { |
3609 | m = MATCH_ERROR; | |
3610 | break; | |
3611 | } | |
3612 | ||
a8b3b0b6 CR |
3613 | /* Check here for the existence of at least one argument for the |
3614 | iso_c_binding functions C_LOC, C_FUNLOC, and C_ASSOCIATED. The | |
3615 | argument(s) given will be checked in gfc_iso_c_func_interface, | |
3616 | during resolution of the function call. */ | |
3617 | if (sym->attr.is_iso_c == 1 | |
3618 | && (sym->from_intmod == INTMOD_ISO_C_BINDING | |
3619 | && (sym->intmod_sym_id == ISOCBINDING_LOC | |
3620 | || sym->intmod_sym_id == ISOCBINDING_FUNLOC | |
3621 | || sym->intmod_sym_id == ISOCBINDING_ASSOCIATED))) | |
3622 | { | |
3623 | /* make sure we were given a param */ | |
3624 | if (actual_arglist == NULL) | |
3625 | { | |
a4d9b221 | 3626 | gfc_error ("Missing argument to %qs at %C", sym->name); |
a8b3b0b6 CR |
3627 | m = MATCH_ERROR; |
3628 | break; | |
3629 | } | |
3630 | } | |
3631 | ||
6de9cd9a DN |
3632 | if (sym->result == NULL) |
3633 | sym->result = sym; | |
3634 | ||
20fee4a9 JW |
3635 | gfc_gobble_whitespace (); |
3636 | /* F08:C612. */ | |
3637 | if (gfc_peek_ascii_char() == '%') | |
3638 | { | |
67914693 | 3639 | gfc_error ("The leftmost part-ref in a data-ref cannot be a " |
20fee4a9 JW |
3640 | "function reference at %C"); |
3641 | m = MATCH_ERROR; | |
3642 | } | |
3643 | ||
6de9cd9a DN |
3644 | m = MATCH_YES; |
3645 | break; | |
3646 | ||
3647 | case FL_UNKNOWN: | |
3648 | ||
3649 | /* Special case for derived type variables that get their types | |
edf1eac2 SK |
3650 | via an IMPLICIT statement. This can't wait for the |
3651 | resolution phase. */ | |
6de9cd9a | 3652 | |
f6288c24 FR |
3653 | old_loc = gfc_current_locus; |
3654 | if (gfc_match_member_sep (sym) == MATCH_YES | |
0dd973dd | 3655 | && sym->ts.type == BT_UNKNOWN |
713485cc | 3656 | && gfc_get_default_type (sym->name, sym->ns)->type == BT_DERIVED) |
6de9cd9a | 3657 | gfc_set_default_type (sym, 0, sym->ns); |
f6288c24 | 3658 | gfc_current_locus = old_loc; |
6de9cd9a | 3659 | |
492792ed | 3660 | /* If the symbol has a (co)dimension attribute, the expression is a |
edf1eac2 | 3661 | variable. */ |
6de9cd9a | 3662 | |
492792ed | 3663 | if (sym->attr.dimension || sym->attr.codimension) |
6de9cd9a | 3664 | { |
524af0d6 | 3665 | if (!gfc_add_flavor (&sym->attr, FL_VARIABLE, sym->name, NULL)) |
6de9cd9a DN |
3666 | { |
3667 | m = MATCH_ERROR; | |
3668 | break; | |
3669 | } | |
3670 | ||
3671 | e = gfc_get_expr (); | |
3672 | e->symtree = symtree; | |
3673 | e->expr_type = EXPR_VARIABLE; | |
713485cc | 3674 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3675 | break; |
3676 | } | |
3677 | ||
cd99c23c | 3678 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok |
492792ed TB |
3679 | && (CLASS_DATA (sym)->attr.dimension |
3680 | || CLASS_DATA (sym)->attr.codimension)) | |
c49ea23d | 3681 | { |
524af0d6 | 3682 | if (!gfc_add_flavor (&sym->attr, FL_VARIABLE, sym->name, NULL)) |
c49ea23d PT |
3683 | { |
3684 | m = MATCH_ERROR; | |
3685 | break; | |
3686 | } | |
3687 | ||
3688 | e = gfc_get_expr (); | |
3689 | e->symtree = symtree; | |
3690 | e->expr_type = EXPR_VARIABLE; | |
3691 | m = gfc_match_varspec (e, 0, false, true); | |
3692 | break; | |
3693 | } | |
3694 | ||
6de9cd9a | 3695 | /* Name is not an array, so we peek to see if a '(' implies a |
edf1eac2 SK |
3696 | function call or a substring reference. Otherwise the |
3697 | variable is just a scalar. */ | |
6de9cd9a DN |
3698 | |
3699 | gfc_gobble_whitespace (); | |
8fc541d3 | 3700 | if (gfc_peek_ascii_char () != '(') |
6de9cd9a DN |
3701 | { |
3702 | /* Assume a scalar variable */ | |
3703 | e = gfc_get_expr (); | |
3704 | e->symtree = symtree; | |
3705 | e->expr_type = EXPR_VARIABLE; | |
3706 | ||
524af0d6 | 3707 | if (!gfc_add_flavor (&sym->attr, FL_VARIABLE, sym->name, NULL)) |
6de9cd9a DN |
3708 | { |
3709 | m = MATCH_ERROR; | |
3710 | break; | |
3711 | } | |
3712 | ||
8e1f752a | 3713 | /*FIXME:??? gfc_match_varspec does set this for us: */ |
6de9cd9a | 3714 | e->ts = sym->ts; |
713485cc | 3715 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3716 | break; |
3717 | } | |
3718 | ||
d3fcc995 TS |
3719 | /* See if this is a function reference with a keyword argument |
3720 | as first argument. We do this because otherwise a spurious | |
3721 | symbol would end up in the symbol table. */ | |
3722 | ||
3723 | old_loc = gfc_current_locus; | |
3724 | m2 = gfc_match (" ( %n =", argname); | |
3725 | gfc_current_locus = old_loc; | |
6de9cd9a DN |
3726 | |
3727 | e = gfc_get_expr (); | |
3728 | e->symtree = symtree; | |
3729 | ||
d3fcc995 | 3730 | if (m2 != MATCH_YES) |
6de9cd9a | 3731 | { |
5270c302 | 3732 | /* Try to figure out whether we're dealing with a character type. |
bf1b77dd | 3733 | We're peeking ahead here, because we don't want to call |
5270c302 AL |
3734 | match_substring if we're dealing with an implicitly typed |
3735 | non-character variable. */ | |
3736 | implicit_char = false; | |
3737 | if (sym->ts.type == BT_UNKNOWN) | |
3738 | { | |
713485cc | 3739 | ts = gfc_get_default_type (sym->name, NULL); |
5270c302 AL |
3740 | if (ts->type == BT_CHARACTER) |
3741 | implicit_char = true; | |
3742 | } | |
3743 | ||
d3fcc995 TS |
3744 | /* See if this could possibly be a substring reference of a name |
3745 | that we're not sure is a variable yet. */ | |
6de9cd9a | 3746 | |
5270c302 | 3747 | if ((implicit_char || sym->ts.type == BT_CHARACTER) |
38217d3e | 3748 | && match_substring (sym->ts.u.cl, 0, &e->ref, false) == MATCH_YES) |
6de9cd9a | 3749 | { |
6de9cd9a | 3750 | |
d3fcc995 TS |
3751 | e->expr_type = EXPR_VARIABLE; |
3752 | ||
3753 | if (sym->attr.flavor != FL_VARIABLE | |
bf1b77dd | 3754 | && !gfc_add_flavor (&sym->attr, FL_VARIABLE, |
524af0d6 | 3755 | sym->name, NULL)) |
d3fcc995 TS |
3756 | { |
3757 | m = MATCH_ERROR; | |
3758 | break; | |
3759 | } | |
3760 | ||
3761 | if (sym->ts.type == BT_UNKNOWN | |
524af0d6 | 3762 | && !gfc_set_default_type (sym, 1, NULL)) |
d3fcc995 TS |
3763 | { |
3764 | m = MATCH_ERROR; | |
3765 | break; | |
3766 | } | |
3767 | ||
3768 | e->ts = sym->ts; | |
860c8f3b | 3769 | if (e->ref) |
bc21d315 | 3770 | e->ts.u.cl = NULL; |
d3fcc995 | 3771 | m = MATCH_YES; |
6de9cd9a DN |
3772 | break; |
3773 | } | |
6de9cd9a DN |
3774 | } |
3775 | ||
3776 | /* Give up, assume we have a function. */ | |
3777 | ||
08a6b8e0 | 3778 | gfc_get_sym_tree (name, NULL, &symtree, false); /* Can't fail */ |
6de9cd9a DN |
3779 | sym = symtree->n.sym; |
3780 | e->expr_type = EXPR_FUNCTION; | |
3781 | ||
3782 | if (!sym->attr.function | |
524af0d6 | 3783 | && !gfc_add_function (&sym->attr, sym->name, NULL)) |
6de9cd9a DN |
3784 | { |
3785 | m = MATCH_ERROR; | |
3786 | break; | |
3787 | } | |
3788 | ||
3789 | sym->result = sym; | |
3790 | ||
3791 | m = gfc_match_actual_arglist (0, &e->value.function.actual); | |
3792 | if (m == MATCH_NO) | |
a4d9b221 | 3793 | gfc_error ("Missing argument list in function %qs at %C", sym->name); |
6de9cd9a DN |
3794 | |
3795 | if (m != MATCH_YES) | |
3796 | { | |
3797 | m = MATCH_ERROR; | |
3798 | break; | |
3799 | } | |
3800 | ||
3801 | /* If our new function returns a character, array or structure | |
edf1eac2 | 3802 | type, it might have subsequent references. */ |
6de9cd9a | 3803 | |
713485cc | 3804 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3805 | if (m == MATCH_NO) |
3806 | m = MATCH_YES; | |
3807 | ||
3808 | break; | |
3809 | ||
3810 | generic_function: | |
f6288c24 FR |
3811 | /* Look for symbol first; if not found, look for STRUCTURE type symbol |
3812 | specially. Creates a generic symbol for derived types. */ | |
3813 | gfc_find_sym_tree (name, NULL, 1, &symtree); | |
3814 | if (!symtree) | |
3815 | gfc_find_sym_tree (gfc_dt_upper_string (name), NULL, 1, &symtree); | |
3816 | if (!symtree || symtree->n.sym->attr.flavor != FL_STRUCT) | |
3817 | gfc_get_sym_tree (name, NULL, &symtree, false); /* Can't fail */ | |
6de9cd9a DN |
3818 | |
3819 | e = gfc_get_expr (); | |
3820 | e->symtree = symtree; | |
3821 | e->expr_type = EXPR_FUNCTION; | |
3822 | ||
f6288c24 | 3823 | if (gfc_fl_struct (sym->attr.flavor)) |
c3f34952 TB |
3824 | { |
3825 | e->value.function.esym = sym; | |
3826 | e->symtree->n.sym->attr.generic = 1; | |
3827 | } | |
3828 | ||
6de9cd9a DN |
3829 | m = gfc_match_actual_arglist (0, &e->value.function.actual); |
3830 | break; | |
3831 | ||
c0f0e35a JD |
3832 | case FL_NAMELIST: |
3833 | m = MATCH_ERROR; | |
3834 | break; | |
3835 | ||
6de9cd9a DN |
3836 | default: |
3837 | gfc_error ("Symbol at %C is not appropriate for an expression"); | |
3838 | return MATCH_ERROR; | |
3839 | } | |
3840 | ||
3841 | if (m == MATCH_YES) | |
3842 | { | |
3843 | e->where = where; | |
3844 | *result = e; | |
3845 | } | |
3846 | else | |
3847 | gfc_free_expr (e); | |
3848 | ||
3849 | return m; | |
3850 | } | |
3851 | ||
3852 | ||
df2fba9e | 3853 | /* Match a variable, i.e. something that can be assigned to. This |
6de9cd9a DN |
3854 | starts as a symbol, can be a structure component or an array |
3855 | reference. It can be a function if the function doesn't have a | |
3856 | separate RESULT variable. If the symbol has not been previously | |
30aabb86 | 3857 | seen, we assume it is a variable. |
6de9cd9a | 3858 | |
30aabb86 PT |
3859 | This function is called by two interface functions: |
3860 | gfc_match_variable, which has host_flag = 1, and | |
3861 | gfc_match_equiv_variable, with host_flag = 0, to restrict the | |
3862 | match of the symbol to the local scope. */ | |
3863 | ||
3864 | static match | |
edf1eac2 | 3865 | match_variable (gfc_expr **result, int equiv_flag, int host_flag) |
6de9cd9a | 3866 | { |
f6288c24 | 3867 | gfc_symbol *sym, *dt_sym; |
6de9cd9a DN |
3868 | gfc_symtree *st; |
3869 | gfc_expr *expr; | |
f6288c24 | 3870 | locus where, old_loc; |
6de9cd9a DN |
3871 | match m; |
3872 | ||
fd2aa7ad PT |
3873 | /* Since nothing has any business being an lvalue in a module |
3874 | specification block, an interface block or a contains section, | |
3875 | we force the changed_symbols mechanism to work by setting | |
3876 | host_flag to 0. This prevents valid symbols that have the name | |
3877 | of keywords, such as 'end', being turned into variables by | |
df2fba9e | 3878 | failed matching to assignments for, e.g., END INTERFACE. */ |
fd2aa7ad | 3879 | if (gfc_current_state () == COMP_MODULE |
4668d6f9 | 3880 | || gfc_current_state () == COMP_SUBMODULE |
fd2aa7ad PT |
3881 | || gfc_current_state () == COMP_INTERFACE |
3882 | || gfc_current_state () == COMP_CONTAINS) | |
3883 | host_flag = 0; | |
3884 | ||
618f4f46 | 3885 | where = gfc_current_locus; |
30aabb86 | 3886 | m = gfc_match_sym_tree (&st, host_flag); |
6de9cd9a DN |
3887 | if (m != MATCH_YES) |
3888 | return m; | |
6de9cd9a DN |
3889 | |
3890 | sym = st->n.sym; | |
9a3db5a3 PT |
3891 | |
3892 | /* If this is an implicit do loop index and implicitly typed, | |
3893 | it should not be host associated. */ | |
3894 | m = check_for_implicit_index (&st, &sym); | |
3895 | if (m != MATCH_YES) | |
3896 | return m; | |
3897 | ||
3898 | sym->attr.implied_index = 0; | |
3899 | ||
6de9cd9a | 3900 | gfc_set_sym_referenced (sym); |
f6288c24 FR |
3901 | |
3902 | /* STRUCTUREs may share names with variables, but derived types may not. */ | |
3903 | if (sym->attr.flavor == FL_PROCEDURE && sym->generic | |
3904 | && (dt_sym = gfc_find_dt_in_generic (sym))) | |
3905 | { | |
3906 | if (dt_sym->attr.flavor == FL_DERIVED) | |
2f029c08 | 3907 | gfc_error ("Derived type %qs cannot be used as a variable at %C", |
f6288c24 FR |
3908 | sym->name); |
3909 | return MATCH_ERROR; | |
3910 | } | |
3911 | ||
6de9cd9a DN |
3912 | switch (sym->attr.flavor) |
3913 | { | |
3914 | case FL_VARIABLE: | |
8c91ab34 | 3915 | /* Everything is alright. */ |
6de9cd9a DN |
3916 | break; |
3917 | ||
3918 | case FL_UNKNOWN: | |
d7e2fcd0 TB |
3919 | { |
3920 | sym_flavor flavor = FL_UNKNOWN; | |
3921 | ||
3922 | gfc_gobble_whitespace (); | |
3923 | ||
3924 | if (sym->attr.external || sym->attr.procedure | |
3925 | || sym->attr.function || sym->attr.subroutine) | |
3926 | flavor = FL_PROCEDURE; | |
b9332b09 PT |
3927 | |
3928 | /* If it is not a procedure, is not typed and is host associated, | |
3929 | we cannot give it a flavor yet. */ | |
3930 | else if (sym->ns == gfc_current_ns->parent | |
3931 | && sym->ts.type == BT_UNKNOWN) | |
3932 | break; | |
3933 | ||
3934 | /* These are definitive indicators that this is a variable. */ | |
8fc541d3 | 3935 | else if (gfc_peek_ascii_char () != '(' || sym->ts.type != BT_UNKNOWN |
d7e2fcd0 TB |
3936 | || sym->attr.pointer || sym->as != NULL) |
3937 | flavor = FL_VARIABLE; | |
3938 | ||
3939 | if (flavor != FL_UNKNOWN | |
524af0d6 | 3940 | && !gfc_add_flavor (&sym->attr, flavor, sym->name, NULL)) |
d7e2fcd0 TB |
3941 | return MATCH_ERROR; |
3942 | } | |
6de9cd9a DN |
3943 | break; |
3944 | ||
5056a350 SK |
3945 | case FL_PARAMETER: |
3946 | if (equiv_flag) | |
8c91ab34 DK |
3947 | { |
3948 | gfc_error ("Named constant at %C in an EQUIVALENCE"); | |
3949 | return MATCH_ERROR; | |
3950 | } | |
3951 | /* Otherwise this is checked for and an error given in the | |
3952 | variable definition context checks. */ | |
5056a350 SK |
3953 | break; |
3954 | ||
6de9cd9a | 3955 | case FL_PROCEDURE: |
01d2a7d7 DF |
3956 | /* Check for a nonrecursive function result variable. */ |
3957 | if (sym->attr.function | |
8c91ab34 DK |
3958 | && !sym->attr.external |
3959 | && sym->result == sym | |
3960 | && (gfc_is_function_return_value (sym, gfc_current_ns) | |
3961 | || (sym->attr.entry | |
3962 | && sym->ns == gfc_current_ns) | |
3963 | || (sym->attr.entry | |
3964 | && sym->ns == gfc_current_ns->parent))) | |
6de9cd9a | 3965 | { |
6de9cd9a DN |
3966 | /* If a function result is a derived type, then the derived |
3967 | type may still have to be resolved. */ | |
3968 | ||
3969 | if (sym->ts.type == BT_DERIVED | |
bc21d315 | 3970 | && gfc_use_derived (sym->ts.u.derived) == NULL) |
6de9cd9a | 3971 | return MATCH_ERROR; |
6de9cd9a DN |
3972 | break; |
3973 | } | |
3974 | ||
3070bab4 | 3975 | if (sym->attr.proc_pointer |
524af0d6 | 3976 | || replace_hidden_procptr_result (&sym, &st)) |
8fb74da4 JW |
3977 | break; |
3978 | ||
6de9cd9a | 3979 | /* Fall through to error */ |
81fea426 | 3980 | gcc_fallthrough (); |
6de9cd9a DN |
3981 | |
3982 | default: | |
a4d9b221 | 3983 | gfc_error ("%qs at %C is not a variable", sym->name); |
6de9cd9a DN |
3984 | return MATCH_ERROR; |
3985 | } | |
3986 | ||
0dd973dd PB |
3987 | /* Special case for derived type variables that get their types |
3988 | via an IMPLICIT statement. This can't wait for the | |
3989 | resolution phase. */ | |
3990 | ||
3991 | { | |
3992 | gfc_namespace * implicit_ns; | |
3993 | ||
3994 | if (gfc_current_ns->proc_name == sym) | |
3995 | implicit_ns = gfc_current_ns; | |
3996 | else | |
3997 | implicit_ns = sym->ns; | |
5bab4c96 | 3998 | |
f6288c24 FR |
3999 | old_loc = gfc_current_locus; |
4000 | if (gfc_match_member_sep (sym) == MATCH_YES | |
0dd973dd | 4001 | && sym->ts.type == BT_UNKNOWN |
713485cc | 4002 | && gfc_get_default_type (sym->name, implicit_ns)->type == BT_DERIVED) |
0dd973dd | 4003 | gfc_set_default_type (sym, 0, implicit_ns); |
f6288c24 | 4004 | gfc_current_locus = old_loc; |
0dd973dd PB |
4005 | } |
4006 | ||
6de9cd9a DN |
4007 | expr = gfc_get_expr (); |
4008 | ||
4009 | expr->expr_type = EXPR_VARIABLE; | |
4010 | expr->symtree = st; | |
4011 | expr->ts = sym->ts; | |
4012 | expr->where = where; | |
4013 | ||
4014 | /* Now see if we have to do more. */ | |
713485cc | 4015 | m = gfc_match_varspec (expr, equiv_flag, false, false); |
6de9cd9a DN |
4016 | if (m != MATCH_YES) |
4017 | { | |
4018 | gfc_free_expr (expr); | |
4019 | return m; | |
4020 | } | |
4021 | ||
4022 | *result = expr; | |
4023 | return MATCH_YES; | |
4024 | } | |
30aabb86 | 4025 | |
edf1eac2 | 4026 | |
30aabb86 | 4027 | match |
edf1eac2 | 4028 | gfc_match_variable (gfc_expr **result, int equiv_flag) |
30aabb86 PT |
4029 | { |
4030 | return match_variable (result, equiv_flag, 1); | |
4031 | } | |
4032 | ||
edf1eac2 | 4033 | |
30aabb86 | 4034 | match |
edf1eac2 | 4035 | gfc_match_equiv_variable (gfc_expr **result) |
30aabb86 PT |
4036 | { |
4037 | return match_variable (result, 1, 0); | |
4038 | } | |
4039 |