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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 | ||
192 | ||
bf1b77dd | 193 | /* Match an integer (digit string and optional kind). |
6de9cd9a DN |
194 | A sign will be accepted if signflag is set. */ |
195 | ||
196 | static match | |
edf1eac2 | 197 | match_integer_constant (gfc_expr **result, int signflag) |
6de9cd9a | 198 | { |
bee64a2b | 199 | int length, kind, is_iso_c; |
6de9cd9a DN |
200 | locus old_loc; |
201 | char *buffer; | |
202 | gfc_expr *e; | |
203 | ||
63645982 | 204 | old_loc = gfc_current_locus; |
6de9cd9a DN |
205 | gfc_gobble_whitespace (); |
206 | ||
207 | length = match_digits (signflag, 10, NULL); | |
63645982 | 208 | gfc_current_locus = old_loc; |
6de9cd9a DN |
209 | if (length == -1) |
210 | return MATCH_NO; | |
211 | ||
ece3f663 | 212 | buffer = (char *) alloca (length + 1); |
6de9cd9a DN |
213 | memset (buffer, '\0', length + 1); |
214 | ||
215 | gfc_gobble_whitespace (); | |
216 | ||
217 | match_digits (signflag, 10, buffer); | |
218 | ||
bee64a2b | 219 | kind = get_kind (&is_iso_c); |
6de9cd9a | 220 | if (kind == -2) |
9d64df18 | 221 | kind = gfc_default_integer_kind; |
6de9cd9a DN |
222 | if (kind == -1) |
223 | return MATCH_ERROR; | |
224 | ||
203c7ebf | 225 | if (kind == 4 && flag_integer4_kind == 8) |
f4347334 ZG |
226 | kind = 8; |
227 | ||
e7a2d5fb | 228 | if (gfc_validate_kind (BT_INTEGER, kind, true) < 0) |
6de9cd9a DN |
229 | { |
230 | gfc_error ("Integer kind %d at %C not available", kind); | |
231 | return MATCH_ERROR; | |
232 | } | |
233 | ||
63645982 | 234 | e = gfc_convert_integer (buffer, kind, 10, &gfc_current_locus); |
bee64a2b | 235 | e->ts.is_c_interop = is_iso_c; |
6de9cd9a DN |
236 | |
237 | if (gfc_range_check (e) != ARITH_OK) | |
238 | { | |
b2458f91 | 239 | gfc_error ("Integer too big for its kind at %C. This check can be " |
a3f9f006 | 240 | "disabled with the option %<-fno-range-check%>"); |
6de9cd9a DN |
241 | |
242 | gfc_free_expr (e); | |
243 | return MATCH_ERROR; | |
244 | } | |
245 | ||
246 | *result = e; | |
247 | return MATCH_YES; | |
248 | } | |
249 | ||
250 | ||
d3642f89 FW |
251 | /* Match a Hollerith constant. */ |
252 | ||
253 | static match | |
edf1eac2 | 254 | match_hollerith_constant (gfc_expr **result) |
d3642f89 FW |
255 | { |
256 | locus old_loc; | |
edf1eac2 | 257 | gfc_expr *e = NULL; |
401fcd3b | 258 | int num, pad; |
bf1b77dd | 259 | int i; |
d3642f89 FW |
260 | |
261 | old_loc = gfc_current_locus; | |
262 | gfc_gobble_whitespace (); | |
263 | ||
264 | if (match_integer_constant (&e, 0) == MATCH_YES | |
edf1eac2 | 265 | && gfc_match_char ('h') == MATCH_YES) |
d3642f89 | 266 | { |
524af0d6 | 267 | if (!gfc_notify_std (GFC_STD_LEGACY, "Hollerith constant at %C")) |
d3642f89 FW |
268 | goto cleanup; |
269 | ||
51f03c6b JJ |
270 | if (gfc_extract_int (e, &num, 1)) |
271 | goto cleanup; | |
d3642f89 FW |
272 | if (num == 0) |
273 | { | |
edf1eac2 SK |
274 | gfc_error ("Invalid Hollerith constant: %L must contain at least " |
275 | "one character", &old_loc); | |
d3642f89 FW |
276 | goto cleanup; |
277 | } | |
278 | if (e->ts.kind != gfc_default_integer_kind) | |
279 | { | |
eb6d74fa | 280 | gfc_error ("Invalid Hollerith constant: Integer kind at %L " |
edf1eac2 | 281 | "should be default", &old_loc); |
d3642f89 FW |
282 | goto cleanup; |
283 | } | |
284 | else | |
285 | { | |
d3642f89 | 286 | gfc_free_expr (e); |
b7e75771 JD |
287 | e = gfc_get_constant_expr (BT_HOLLERITH, gfc_default_character_kind, |
288 | &gfc_current_locus); | |
20585ad6 | 289 | |
401fcd3b JD |
290 | /* Calculate padding needed to fit default integer memory. */ |
291 | pad = gfc_default_integer_kind - (num % gfc_default_integer_kind); | |
292 | ||
293 | e->representation.string = XCNEWVEC (char, num + pad + 1); | |
8fc541d3 | 294 | |
20585ad6 | 295 | for (i = 0; i < num; i++) |
00660189 | 296 | { |
696abb30 | 297 | gfc_char_t c = gfc_next_char_literal (INSTRING_WARN); |
00660189 FXC |
298 | if (! gfc_wide_fits_in_byte (c)) |
299 | { | |
300 | gfc_error ("Invalid Hollerith constant at %L contains a " | |
301 | "wide character", &old_loc); | |
302 | goto cleanup; | |
303 | } | |
304 | ||
305 | e->representation.string[i] = (unsigned char) c; | |
306 | } | |
8fc541d3 | 307 | |
401fcd3b JD |
308 | /* Now pad with blanks and end with a null char. */ |
309 | for (i = 0; i < pad; i++) | |
310 | e->representation.string[num + i] = ' '; | |
311 | ||
312 | e->representation.string[num + i] = '\0'; | |
313 | e->representation.length = num + pad; | |
314 | e->ts.u.pad = pad; | |
20585ad6 | 315 | |
d3642f89 FW |
316 | *result = e; |
317 | return MATCH_YES; | |
318 | } | |
319 | } | |
320 | ||
321 | gfc_free_expr (e); | |
322 | gfc_current_locus = old_loc; | |
323 | return MATCH_NO; | |
324 | ||
325 | cleanup: | |
326 | gfc_free_expr (e); | |
327 | return MATCH_ERROR; | |
328 | } | |
329 | ||
330 | ||
6de9cd9a | 331 | /* Match a binary, octal or hexadecimal constant that can be found in |
78019d16 SK |
332 | a DATA statement. The standard permits b'010...', o'73...', and |
333 | z'a1...' where b, o, and z can be capital letters. This function | |
334 | also accepts postfixed forms of the constants: '01...'b, '73...'o, | |
335 | and 'a1...'z. An additional extension is the use of x for z. */ | |
6de9cd9a DN |
336 | |
337 | static match | |
edf1eac2 | 338 | match_boz_constant (gfc_expr **result) |
6de9cd9a | 339 | { |
8fc541d3 | 340 | int radix, length, x_hex, kind; |
78019d16 | 341 | locus old_loc, start_loc; |
8fc541d3 | 342 | char *buffer, post, delim; |
6de9cd9a | 343 | gfc_expr *e; |
6de9cd9a | 344 | |
78019d16 | 345 | start_loc = old_loc = gfc_current_locus; |
6de9cd9a DN |
346 | gfc_gobble_whitespace (); |
347 | ||
88199e7c | 348 | x_hex = 0; |
8fc541d3 | 349 | switch (post = gfc_next_ascii_char ()) |
6de9cd9a DN |
350 | { |
351 | case 'b': | |
352 | radix = 2; | |
78019d16 | 353 | post = 0; |
6de9cd9a DN |
354 | break; |
355 | case 'o': | |
356 | radix = 8; | |
78019d16 | 357 | post = 0; |
6de9cd9a DN |
358 | break; |
359 | case 'x': | |
88199e7c | 360 | x_hex = 1; |
6de9cd9a DN |
361 | /* Fall through. */ |
362 | case 'z': | |
363 | radix = 16; | |
78019d16 SK |
364 | post = 0; |
365 | break; | |
366 | case '\'': | |
367 | /* Fall through. */ | |
368 | case '\"': | |
369 | delim = post; | |
370 | post = 1; | |
371 | radix = 16; /* Set to accept any valid digit string. */ | |
6de9cd9a DN |
372 | break; |
373 | default: | |
374 | goto backup; | |
375 | } | |
376 | ||
377 | /* No whitespace allowed here. */ | |
378 | ||
78019d16 | 379 | if (post == 0) |
8fc541d3 | 380 | delim = gfc_next_ascii_char (); |
78019d16 | 381 | |
6de9cd9a DN |
382 | if (delim != '\'' && delim != '\"') |
383 | goto backup; | |
384 | ||
00a4618b | 385 | if (x_hex |
524af0d6 JB |
386 | && (!gfc_notify_std(GFC_STD_GNU, "Hexadecimal " |
387 | "constant at %C uses non-standard syntax"))) | |
5d874166 TS |
388 | return MATCH_ERROR; |
389 | ||
63645982 | 390 | old_loc = gfc_current_locus; |
6de9cd9a DN |
391 | |
392 | length = match_digits (0, radix, NULL); | |
393 | if (length == -1) | |
394 | { | |
78019d16 | 395 | gfc_error ("Empty set of digits in BOZ constant at %C"); |
6de9cd9a DN |
396 | return MATCH_ERROR; |
397 | } | |
398 | ||
8fc541d3 | 399 | if (gfc_next_ascii_char () != delim) |
6de9cd9a | 400 | { |
78019d16 SK |
401 | gfc_error ("Illegal character in BOZ constant at %C"); |
402 | return MATCH_ERROR; | |
403 | } | |
404 | ||
405 | if (post == 1) | |
406 | { | |
8fc541d3 | 407 | switch (gfc_next_ascii_char ()) |
78019d16 SK |
408 | { |
409 | case 'b': | |
410 | radix = 2; | |
21dac32c | 411 | break; |
78019d16 SK |
412 | case 'o': |
413 | radix = 8; | |
21dac32c | 414 | break; |
78019d16 SK |
415 | case 'x': |
416 | /* Fall through. */ | |
417 | case 'z': | |
418 | radix = 16; | |
21dac32c | 419 | break; |
31043f6c | 420 | default: |
78019d16 | 421 | goto backup; |
31043f6c | 422 | } |
0bf0efd5 | 423 | |
524af0d6 JB |
424 | if (!gfc_notify_std (GFC_STD_GNU, "BOZ constant " |
425 | "at %C uses non-standard postfix syntax")) | |
0bf0efd5 | 426 | return MATCH_ERROR; |
6de9cd9a DN |
427 | } |
428 | ||
63645982 | 429 | gfc_current_locus = old_loc; |
6de9cd9a | 430 | |
ece3f663 | 431 | buffer = (char *) alloca (length + 1); |
6de9cd9a DN |
432 | memset (buffer, '\0', length + 1); |
433 | ||
434 | match_digits (0, radix, buffer); | |
8fc541d3 | 435 | gfc_next_ascii_char (); /* Eat delimiter. */ |
78019d16 | 436 | if (post == 1) |
8fc541d3 | 437 | gfc_next_ascii_char (); /* Eat postfixed b, o, z, or x. */ |
6de9cd9a | 438 | |
f4e7375a SK |
439 | /* In section 5.2.5 and following C567 in the Fortran 2003 standard, we find |
440 | "If a data-stmt-constant is a boz-literal-constant, the corresponding | |
441 | variable shall be of type integer. The boz-literal-constant is treated | |
442 | as if it were an int-literal-constant with a kind-param that specifies | |
443 | the representation method with the largest decimal exponent range | |
444 | supported by the processor." */ | |
445 | ||
446 | kind = gfc_max_integer_kind; | |
5d874166 | 447 | e = gfc_convert_integer (buffer, kind, radix, &gfc_current_locus); |
6de9cd9a | 448 | |
00a4618b TB |
449 | /* Mark as boz variable. */ |
450 | e->is_boz = 1; | |
451 | ||
6de9cd9a DN |
452 | if (gfc_range_check (e) != ARITH_OK) |
453 | { | |
5d874166 | 454 | gfc_error ("Integer too big for integer kind %i at %C", kind); |
88199e7c TS |
455 | gfc_free_expr (e); |
456 | return MATCH_ERROR; | |
457 | } | |
458 | ||
0bf0efd5 | 459 | if (!gfc_in_match_data () |
524af0d6 JB |
460 | && (!gfc_notify_std(GFC_STD_F2003, "BOZ used outside a DATA " |
461 | "statement at %C"))) | |
0bf0efd5 TB |
462 | return MATCH_ERROR; |
463 | ||
6de9cd9a DN |
464 | *result = e; |
465 | return MATCH_YES; | |
466 | ||
467 | backup: | |
78019d16 | 468 | gfc_current_locus = start_loc; |
6de9cd9a DN |
469 | return MATCH_NO; |
470 | } | |
471 | ||
472 | ||
69029c61 | 473 | /* Match a real constant of some sort. Allow a signed constant if signflag |
00a4618b | 474 | is nonzero. */ |
6de9cd9a DN |
475 | |
476 | static match | |
edf1eac2 | 477 | match_real_constant (gfc_expr **result, int signflag) |
6de9cd9a | 478 | { |
6869e9c6 | 479 | int kind, count, seen_dp, seen_digits, is_iso_c, default_exponent; |
6de9cd9a | 480 | locus old_loc, temp_loc; |
8fc541d3 | 481 | char *p, *buffer, c, exp_char; |
6de9cd9a | 482 | gfc_expr *e; |
69029c61 | 483 | bool negate; |
6de9cd9a | 484 | |
63645982 | 485 | old_loc = gfc_current_locus; |
6de9cd9a DN |
486 | gfc_gobble_whitespace (); |
487 | ||
488 | e = NULL; | |
489 | ||
6869e9c6 | 490 | default_exponent = 0; |
6de9cd9a DN |
491 | count = 0; |
492 | seen_dp = 0; | |
493 | seen_digits = 0; | |
494 | exp_char = ' '; | |
69029c61 | 495 | negate = FALSE; |
6de9cd9a | 496 | |
8fc541d3 | 497 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
498 | if (signflag && (c == '+' || c == '-')) |
499 | { | |
69029c61 PB |
500 | if (c == '-') |
501 | negate = TRUE; | |
502 | ||
503 | gfc_gobble_whitespace (); | |
8fc541d3 | 504 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
505 | } |
506 | ||
02712c16 | 507 | /* Scan significand. */ |
8fc541d3 | 508 | for (;; c = gfc_next_ascii_char (), count++) |
6de9cd9a DN |
509 | { |
510 | if (c == '.') | |
511 | { | |
512 | if (seen_dp) | |
513 | goto done; | |
514 | ||
bf1b77dd | 515 | /* Check to see if "." goes with a following operator like |
edf1eac2 | 516 | ".eq.". */ |
63645982 | 517 | temp_loc = gfc_current_locus; |
8fc541d3 | 518 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
519 | |
520 | if (c == 'e' || c == 'd' || c == 'q') | |
521 | { | |
8fc541d3 | 522 | c = gfc_next_ascii_char (); |
6de9cd9a | 523 | if (c == '.') |
f7b529fa | 524 | goto done; /* Operator named .e. or .d. */ |
6de9cd9a DN |
525 | } |
526 | ||
527 | if (ISALPHA (c)) | |
528 | goto done; /* Distinguish 1.e9 from 1.eq.2 */ | |
529 | ||
63645982 | 530 | gfc_current_locus = temp_loc; |
6de9cd9a DN |
531 | seen_dp = 1; |
532 | continue; | |
533 | } | |
534 | ||
535 | if (ISDIGIT (c)) | |
536 | { | |
537 | seen_digits = 1; | |
538 | continue; | |
539 | } | |
540 | ||
541 | break; | |
542 | } | |
543 | ||
edf1eac2 | 544 | if (!seen_digits || (c != 'e' && c != 'd' && c != 'q')) |
6de9cd9a DN |
545 | goto done; |
546 | exp_char = c; | |
547 | ||
5a17346a SK |
548 | |
549 | if (c == 'q') | |
550 | { | |
524af0d6 JB |
551 | if (!gfc_notify_std (GFC_STD_GNU, "exponent-letter 'q' in " |
552 | "real-literal-constant at %C")) | |
5a17346a | 553 | return MATCH_ERROR; |
73e42eef | 554 | else if (warn_real_q_constant) |
48749dbc MLI |
555 | gfc_warning (OPT_Wreal_q_constant, |
556 | "Extension: exponent-letter %<q%> in real-literal-constant " | |
557 | "at %C"); | |
5a17346a SK |
558 | } |
559 | ||
6de9cd9a | 560 | /* Scan exponent. */ |
8fc541d3 | 561 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
562 | count++; |
563 | ||
564 | if (c == '+' || c == '-') | |
565 | { /* optional sign */ | |
8fc541d3 | 566 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
567 | count++; |
568 | } | |
569 | ||
570 | if (!ISDIGIT (c)) | |
571 | { | |
6869e9c6 FR |
572 | /* With -fdec, default exponent to 0 instead of complaining. */ |
573 | if (flag_dec) | |
574 | default_exponent = 1; | |
575 | else | |
576 | { | |
577 | gfc_error ("Missing exponent in real number at %C"); | |
578 | return MATCH_ERROR; | |
579 | } | |
6de9cd9a DN |
580 | } |
581 | ||
582 | while (ISDIGIT (c)) | |
583 | { | |
8fc541d3 | 584 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
585 | count++; |
586 | } | |
587 | ||
588 | done: | |
69029c61 | 589 | /* Check that we have a numeric constant. */ |
6de9cd9a DN |
590 | if (!seen_digits || (!seen_dp && exp_char == ' ')) |
591 | { | |
63645982 | 592 | gfc_current_locus = old_loc; |
6de9cd9a DN |
593 | return MATCH_NO; |
594 | } | |
595 | ||
596 | /* Convert the number. */ | |
63645982 | 597 | gfc_current_locus = old_loc; |
6de9cd9a DN |
598 | gfc_gobble_whitespace (); |
599 | ||
6869e9c6 FR |
600 | buffer = (char *) alloca (count + default_exponent + 1); |
601 | memset (buffer, '\0', count + default_exponent + 1); | |
6de9cd9a | 602 | |
6de9cd9a | 603 | p = buffer; |
8fc541d3 | 604 | c = gfc_next_ascii_char (); |
69029c61 | 605 | if (c == '+' || c == '-') |
6de9cd9a | 606 | { |
69029c61 | 607 | gfc_gobble_whitespace (); |
8fc541d3 | 608 | c = gfc_next_ascii_char (); |
69029c61 PB |
609 | } |
610 | ||
611 | /* Hack for mpfr_set_str(). */ | |
612 | for (;;) | |
613 | { | |
614 | if (c == 'd' || c == 'q') | |
6de9cd9a | 615 | *p = 'e'; |
69029c61 PB |
616 | else |
617 | *p = c; | |
6de9cd9a | 618 | p++; |
69029c61 PB |
619 | if (--count == 0) |
620 | break; | |
621 | ||
8fc541d3 | 622 | c = gfc_next_ascii_char (); |
6de9cd9a | 623 | } |
6869e9c6 FR |
624 | if (default_exponent) |
625 | *p++ = '0'; | |
6de9cd9a | 626 | |
bee64a2b | 627 | kind = get_kind (&is_iso_c); |
6de9cd9a DN |
628 | if (kind == -1) |
629 | goto cleanup; | |
630 | ||
631 | switch (exp_char) | |
632 | { | |
633 | case 'd': | |
634 | if (kind != -2) | |
635 | { | |
a4d9b221 | 636 | gfc_error ("Real number at %C has a %<d%> exponent and an explicit " |
edf1eac2 | 637 | "kind"); |
6de9cd9a DN |
638 | goto cleanup; |
639 | } | |
9d64df18 | 640 | kind = gfc_default_double_kind; |
f4347334 ZG |
641 | |
642 | if (kind == 4) | |
643 | { | |
203c7ebf | 644 | if (flag_real4_kind == 8) |
f4347334 | 645 | kind = 8; |
203c7ebf | 646 | if (flag_real4_kind == 10) |
f4347334 | 647 | kind = 10; |
203c7ebf | 648 | if (flag_real4_kind == 16) |
f4347334 ZG |
649 | kind = 16; |
650 | } | |
651 | ||
652 | if (kind == 8) | |
653 | { | |
203c7ebf | 654 | if (flag_real8_kind == 4) |
f4347334 | 655 | kind = 4; |
203c7ebf | 656 | if (flag_real8_kind == 10) |
f4347334 | 657 | kind = 10; |
203c7ebf | 658 | if (flag_real8_kind == 16) |
f4347334 ZG |
659 | kind = 16; |
660 | } | |
6de9cd9a DN |
661 | break; |
662 | ||
5a17346a SK |
663 | case 'q': |
664 | if (kind != -2) | |
665 | { | |
a4d9b221 | 666 | gfc_error ("Real number at %C has a %<q%> exponent and an explicit " |
5a17346a SK |
667 | "kind"); |
668 | goto cleanup; | |
669 | } | |
670 | ||
671 | /* The maximum possible real kind type parameter is 16. First, try | |
672 | that for the kind, then fallback to trying kind=10 (Intel 80 bit) | |
673 | extended precision. If neither value works, just given up. */ | |
674 | kind = 16; | |
675 | if (gfc_validate_kind (BT_REAL, kind, true) < 0) | |
676 | { | |
677 | kind = 10; | |
678 | if (gfc_validate_kind (BT_REAL, kind, true) < 0) | |
679 | { | |
a4d9b221 | 680 | gfc_error ("Invalid exponent-letter %<q%> in " |
5a17346a SK |
681 | "real-literal-constant at %C"); |
682 | goto cleanup; | |
683 | } | |
684 | } | |
685 | break; | |
686 | ||
6de9cd9a DN |
687 | default: |
688 | if (kind == -2) | |
9d64df18 | 689 | kind = gfc_default_real_kind; |
6de9cd9a | 690 | |
f4347334 ZG |
691 | if (kind == 4) |
692 | { | |
203c7ebf | 693 | if (flag_real4_kind == 8) |
f4347334 | 694 | kind = 8; |
203c7ebf | 695 | if (flag_real4_kind == 10) |
f4347334 | 696 | kind = 10; |
203c7ebf | 697 | if (flag_real4_kind == 16) |
f4347334 ZG |
698 | kind = 16; |
699 | } | |
700 | ||
701 | if (kind == 8) | |
702 | { | |
203c7ebf | 703 | if (flag_real8_kind == 4) |
f4347334 | 704 | kind = 4; |
203c7ebf | 705 | if (flag_real8_kind == 10) |
f4347334 | 706 | kind = 10; |
203c7ebf | 707 | if (flag_real8_kind == 16) |
f4347334 ZG |
708 | kind = 16; |
709 | } | |
710 | ||
e7a2d5fb | 711 | if (gfc_validate_kind (BT_REAL, kind, true) < 0) |
6de9cd9a DN |
712 | { |
713 | gfc_error ("Invalid real kind %d at %C", kind); | |
714 | goto cleanup; | |
715 | } | |
716 | } | |
717 | ||
63645982 | 718 | e = gfc_convert_real (buffer, kind, &gfc_current_locus); |
69029c61 PB |
719 | if (negate) |
720 | mpfr_neg (e->value.real, e->value.real, GFC_RND_MODE); | |
bee64a2b | 721 | e->ts.is_c_interop = is_iso_c; |
6de9cd9a DN |
722 | |
723 | switch (gfc_range_check (e)) | |
724 | { | |
725 | case ARITH_OK: | |
726 | break; | |
727 | case ARITH_OVERFLOW: | |
728 | gfc_error ("Real constant overflows its kind at %C"); | |
729 | goto cleanup; | |
730 | ||
731 | case ARITH_UNDERFLOW: | |
73e42eef | 732 | if (warn_underflow) |
48749dbc | 733 | gfc_warning (OPT_Wunderflow, "Real constant underflows its kind at %C"); |
f8e566e5 | 734 | mpfr_set_ui (e->value.real, 0, GFC_RND_MODE); |
2d8b59df | 735 | break; |
6de9cd9a DN |
736 | |
737 | default: | |
738 | gfc_internal_error ("gfc_range_check() returned bad value"); | |
739 | } | |
740 | ||
cbf560d7 TK |
741 | /* Warn about trailing digits which suggest the user added too many |
742 | trailing digits, which may cause the appearance of higher pecision | |
743 | than the kind kan support. | |
744 | ||
745 | This is done by replacing the rightmost non-zero digit with zero | |
746 | and comparing with the original value. If these are equal, we | |
747 | assume the user supplied more digits than intended (or forgot to | |
748 | convert to the correct kind). | |
749 | */ | |
750 | ||
751 | if (warn_conversion_extra) | |
752 | { | |
753 | mpfr_t r; | |
754 | char *c, *p; | |
755 | bool did_break; | |
756 | ||
757 | c = strchr (buffer, 'e'); | |
758 | if (c == NULL) | |
759 | c = buffer + strlen(buffer); | |
760 | ||
761 | did_break = false; | |
762 | for (p = c - 1; p >= buffer; p--) | |
763 | { | |
764 | if (*p == '.') | |
765 | continue; | |
38217d3e | 766 | |
cbf560d7 TK |
767 | if (*p != '0') |
768 | { | |
769 | *p = '0'; | |
770 | did_break = true; | |
771 | break; | |
772 | } | |
773 | } | |
774 | ||
775 | if (did_break) | |
776 | { | |
777 | mpfr_init (r); | |
778 | mpfr_set_str (r, buffer, 10, GFC_RND_MODE); | |
779 | if (negate) | |
780 | mpfr_neg (r, r, GFC_RND_MODE); | |
781 | ||
782 | mpfr_sub (r, r, e->value.real, GFC_RND_MODE); | |
783 | ||
784 | if (mpfr_cmp_ui (r, 0) == 0) | |
785 | gfc_warning (OPT_Wconversion_extra, "Non-significant digits " | |
786 | "in %qs number at %C, maybe incorrect KIND", | |
787 | gfc_typename (&e->ts)); | |
788 | ||
789 | mpfr_clear (r); | |
790 | } | |
791 | } | |
792 | ||
6de9cd9a DN |
793 | *result = e; |
794 | return MATCH_YES; | |
795 | ||
796 | cleanup: | |
797 | gfc_free_expr (e); | |
798 | return MATCH_ERROR; | |
799 | } | |
800 | ||
801 | ||
802 | /* Match a substring reference. */ | |
803 | ||
804 | static match | |
38217d3e | 805 | match_substring (gfc_charlen *cl, int init, gfc_ref **result, bool deferred) |
6de9cd9a DN |
806 | { |
807 | gfc_expr *start, *end; | |
808 | locus old_loc; | |
809 | gfc_ref *ref; | |
810 | match m; | |
811 | ||
812 | start = NULL; | |
813 | end = NULL; | |
814 | ||
63645982 | 815 | old_loc = gfc_current_locus; |
6de9cd9a DN |
816 | |
817 | m = gfc_match_char ('('); | |
818 | if (m != MATCH_YES) | |
819 | return MATCH_NO; | |
820 | ||
821 | if (gfc_match_char (':') != MATCH_YES) | |
822 | { | |
823 | if (init) | |
824 | m = gfc_match_init_expr (&start); | |
825 | else | |
826 | m = gfc_match_expr (&start); | |
827 | ||
828 | if (m != MATCH_YES) | |
829 | { | |
830 | m = MATCH_NO; | |
831 | goto cleanup; | |
832 | } | |
833 | ||
834 | m = gfc_match_char (':'); | |
835 | if (m != MATCH_YES) | |
836 | goto cleanup; | |
837 | } | |
838 | ||
839 | if (gfc_match_char (')') != MATCH_YES) | |
840 | { | |
841 | if (init) | |
842 | m = gfc_match_init_expr (&end); | |
843 | else | |
844 | m = gfc_match_expr (&end); | |
845 | ||
846 | if (m == MATCH_NO) | |
847 | goto syntax; | |
848 | if (m == MATCH_ERROR) | |
849 | goto cleanup; | |
850 | ||
851 | m = gfc_match_char (')'); | |
852 | if (m == MATCH_NO) | |
853 | goto syntax; | |
854 | } | |
855 | ||
856 | /* Optimize away the (:) reference. */ | |
38217d3e | 857 | if (start == NULL && end == NULL && !deferred) |
6de9cd9a DN |
858 | ref = NULL; |
859 | else | |
860 | { | |
861 | ref = gfc_get_ref (); | |
862 | ||
863 | ref->type = REF_SUBSTRING; | |
864 | if (start == NULL) | |
f622221a | 865 | start = gfc_get_int_expr (gfc_charlen_int_kind, NULL, 1); |
6de9cd9a DN |
866 | ref->u.ss.start = start; |
867 | if (end == NULL && cl) | |
868 | end = gfc_copy_expr (cl->length); | |
869 | ref->u.ss.end = end; | |
870 | ref->u.ss.length = cl; | |
871 | } | |
872 | ||
873 | *result = ref; | |
874 | return MATCH_YES; | |
875 | ||
876 | syntax: | |
877 | gfc_error ("Syntax error in SUBSTRING specification at %C"); | |
878 | m = MATCH_ERROR; | |
879 | ||
880 | cleanup: | |
881 | gfc_free_expr (start); | |
882 | gfc_free_expr (end); | |
883 | ||
63645982 | 884 | gfc_current_locus = old_loc; |
6de9cd9a DN |
885 | return m; |
886 | } | |
887 | ||
888 | ||
889 | /* Reads the next character of a string constant, taking care to | |
890 | return doubled delimiters on the input as a single instance of | |
891 | the delimiter. | |
892 | ||
8fc541d3 | 893 | Special return values for "ret" argument are: |
6de9cd9a DN |
894 | -1 End of the string, as determined by the delimiter |
895 | -2 Unterminated string detected | |
896 | ||
897 | Backslash codes are also expanded at this time. */ | |
898 | ||
8fc541d3 FXC |
899 | static gfc_char_t |
900 | next_string_char (gfc_char_t delimiter, int *ret) | |
6de9cd9a DN |
901 | { |
902 | locus old_locus; | |
8fc541d3 | 903 | gfc_char_t c; |
6de9cd9a | 904 | |
696abb30 | 905 | c = gfc_next_char_literal (INSTRING_WARN); |
8fc541d3 | 906 | *ret = 0; |
6de9cd9a DN |
907 | |
908 | if (c == '\n') | |
8fc541d3 FXC |
909 | { |
910 | *ret = -2; | |
911 | return 0; | |
912 | } | |
6de9cd9a | 913 | |
c61819ff | 914 | if (flag_backslash && c == '\\') |
6de9cd9a | 915 | { |
63645982 | 916 | old_locus = gfc_current_locus; |
6de9cd9a | 917 | |
a88a266c SK |
918 | if (gfc_match_special_char (&c) == MATCH_NO) |
919 | gfc_current_locus = old_locus; | |
2e6a83a7 SK |
920 | |
921 | if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings) | |
db30e21c | 922 | gfc_warning (0, "Extension: backslash character at %C"); |
6de9cd9a DN |
923 | } |
924 | ||
925 | if (c != delimiter) | |
926 | return c; | |
927 | ||
63645982 | 928 | old_locus = gfc_current_locus; |
696abb30 | 929 | c = gfc_next_char_literal (NONSTRING); |
6de9cd9a DN |
930 | |
931 | if (c == delimiter) | |
932 | return c; | |
63645982 | 933 | gfc_current_locus = old_locus; |
6de9cd9a | 934 | |
8fc541d3 FXC |
935 | *ret = -1; |
936 | return 0; | |
6de9cd9a DN |
937 | } |
938 | ||
939 | ||
940 | /* Special case of gfc_match_name() that matches a parameter kind name | |
941 | before a string constant. This takes case of the weird but legal | |
4f8ea09e | 942 | case of: |
6de9cd9a DN |
943 | |
944 | kind_____'string' | |
945 | ||
946 | where kind____ is a parameter. gfc_match_name() will happily slurp | |
947 | up all the underscores, which leads to problems. If we return | |
948 | MATCH_YES, the parse pointer points to the final underscore, which | |
949 | is not part of the name. We never return MATCH_ERROR-- errors in | |
950 | the name will be detected later. */ | |
951 | ||
952 | static match | |
953 | match_charkind_name (char *name) | |
954 | { | |
955 | locus old_loc; | |
956 | char c, peek; | |
957 | int len; | |
958 | ||
959 | gfc_gobble_whitespace (); | |
8fc541d3 | 960 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
961 | if (!ISALPHA (c)) |
962 | return MATCH_NO; | |
963 | ||
964 | *name++ = c; | |
965 | len = 1; | |
966 | ||
967 | for (;;) | |
968 | { | |
63645982 | 969 | old_loc = gfc_current_locus; |
8fc541d3 | 970 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
971 | |
972 | if (c == '_') | |
973 | { | |
8fc541d3 | 974 | peek = gfc_peek_ascii_char (); |
6de9cd9a DN |
975 | |
976 | if (peek == '\'' || peek == '\"') | |
977 | { | |
63645982 | 978 | gfc_current_locus = old_loc; |
6de9cd9a DN |
979 | *name = '\0'; |
980 | return MATCH_YES; | |
981 | } | |
982 | } | |
983 | ||
984 | if (!ISALNUM (c) | |
985 | && c != '_' | |
c61819ff | 986 | && (c != '$' || !flag_dollar_ok)) |
6de9cd9a DN |
987 | break; |
988 | ||
989 | *name++ = c; | |
990 | if (++len > GFC_MAX_SYMBOL_LEN) | |
991 | break; | |
992 | } | |
993 | ||
994 | return MATCH_NO; | |
995 | } | |
996 | ||
997 | ||
998 | /* See if the current input matches a character constant. Lots of | |
999 | contortions have to be done to match the kind parameter which comes | |
1000 | before the actual string. The main consideration is that we don't | |
1001 | want to error out too quickly. For example, we don't actually do | |
1002 | any validation of the kinds until we have actually seen a legal | |
1003 | delimiter. Using match_kind_param() generates errors too quickly. */ | |
1004 | ||
1005 | static match | |
edf1eac2 | 1006 | match_string_constant (gfc_expr **result) |
6de9cd9a | 1007 | { |
00660189 | 1008 | char name[GFC_MAX_SYMBOL_LEN + 1], peek; |
6b271a2e JB |
1009 | size_t length; |
1010 | int kind,save_warn_ampersand, ret; | |
6de9cd9a DN |
1011 | locus old_locus, start_locus; |
1012 | gfc_symbol *sym; | |
1013 | gfc_expr *e; | |
6de9cd9a | 1014 | match m; |
00660189 | 1015 | gfc_char_t c, delimiter, *p; |
6de9cd9a | 1016 | |
63645982 | 1017 | old_locus = gfc_current_locus; |
6de9cd9a DN |
1018 | |
1019 | gfc_gobble_whitespace (); | |
1020 | ||
6de9cd9a DN |
1021 | c = gfc_next_char (); |
1022 | if (c == '\'' || c == '"') | |
1023 | { | |
9d64df18 | 1024 | kind = gfc_default_character_kind; |
66faed76 | 1025 | start_locus = gfc_current_locus; |
6de9cd9a DN |
1026 | goto got_delim; |
1027 | } | |
1028 | ||
8fc541d3 | 1029 | if (gfc_wide_is_digit (c)) |
6de9cd9a DN |
1030 | { |
1031 | kind = 0; | |
1032 | ||
8fc541d3 | 1033 | while (gfc_wide_is_digit (c)) |
6de9cd9a DN |
1034 | { |
1035 | kind = kind * 10 + c - '0'; | |
1036 | if (kind > 9999999) | |
1037 | goto no_match; | |
1038 | c = gfc_next_char (); | |
1039 | } | |
1040 | ||
1041 | } | |
1042 | else | |
1043 | { | |
63645982 | 1044 | gfc_current_locus = old_locus; |
6de9cd9a DN |
1045 | |
1046 | m = match_charkind_name (name); | |
1047 | if (m != MATCH_YES) | |
1048 | goto no_match; | |
1049 | ||
1050 | if (gfc_find_symbol (name, NULL, 1, &sym) | |
1051 | || sym == NULL | |
1052 | || sym->attr.flavor != FL_PARAMETER) | |
1053 | goto no_match; | |
1054 | ||
1055 | kind = -1; | |
1056 | c = gfc_next_char (); | |
1057 | } | |
1058 | ||
1059 | if (c == ' ') | |
1060 | { | |
1061 | gfc_gobble_whitespace (); | |
1062 | c = gfc_next_char (); | |
1063 | } | |
1064 | ||
1065 | if (c != '_') | |
1066 | goto no_match; | |
1067 | ||
1068 | gfc_gobble_whitespace (); | |
6de9cd9a DN |
1069 | |
1070 | c = gfc_next_char (); | |
1071 | if (c != '\'' && c != '"') | |
1072 | goto no_match; | |
1073 | ||
66faed76 DF |
1074 | start_locus = gfc_current_locus; |
1075 | ||
6de9cd9a DN |
1076 | if (kind == -1) |
1077 | { | |
51f03c6b JJ |
1078 | if (gfc_extract_int (sym->value, &kind, 1)) |
1079 | return MATCH_ERROR; | |
a39fafac | 1080 | gfc_set_sym_referenced (sym); |
6de9cd9a DN |
1081 | } |
1082 | ||
e7a2d5fb | 1083 | if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
6de9cd9a DN |
1084 | { |
1085 | gfc_error ("Invalid kind %d for CHARACTER constant at %C", kind); | |
1086 | return MATCH_ERROR; | |
1087 | } | |
1088 | ||
1089 | got_delim: | |
1090 | /* Scan the string into a block of memory by first figuring out how | |
1091 | long it is, allocating the structure, then re-reading it. This | |
1092 | isn't particularly efficient, but string constants aren't that | |
1093 | common in most code. TODO: Use obstacks? */ | |
1094 | ||
1095 | delimiter = c; | |
1096 | length = 0; | |
1097 | ||
1098 | for (;;) | |
1099 | { | |
8fc541d3 FXC |
1100 | c = next_string_char (delimiter, &ret); |
1101 | if (ret == -1) | |
6de9cd9a | 1102 | break; |
8fc541d3 | 1103 | if (ret == -2) |
6de9cd9a | 1104 | { |
63645982 | 1105 | gfc_current_locus = start_locus; |
6de9cd9a DN |
1106 | gfc_error ("Unterminated character constant beginning at %C"); |
1107 | return MATCH_ERROR; | |
1108 | } | |
1109 | ||
1110 | length++; | |
1111 | } | |
1112 | ||
78019d16 SK |
1113 | /* Peek at the next character to see if it is a b, o, z, or x for the |
1114 | postfixed BOZ literal constants. */ | |
8fc541d3 FXC |
1115 | peek = gfc_peek_ascii_char (); |
1116 | if (peek == 'b' || peek == 'o' || peek =='z' || peek == 'x') | |
78019d16 SK |
1117 | goto no_match; |
1118 | ||
b7e75771 | 1119 | e = gfc_get_character_expr (kind, &start_locus, NULL, length); |
6de9cd9a | 1120 | |
63645982 | 1121 | gfc_current_locus = start_locus; |
6de9cd9a | 1122 | |
1355d8e7 TB |
1123 | /* We disable the warning for the following loop as the warning has already |
1124 | been printed in the loop above. */ | |
73e42eef | 1125 | save_warn_ampersand = warn_ampersand; |
48749dbc | 1126 | warn_ampersand = false; |
1355d8e7 | 1127 | |
b7e75771 | 1128 | p = e->value.character.string; |
6b271a2e | 1129 | for (size_t i = 0; i < length; i++) |
8fc541d3 FXC |
1130 | { |
1131 | c = next_string_char (delimiter, &ret); | |
1132 | ||
d393bbd7 | 1133 | if (!gfc_check_character_range (c, kind)) |
8fc541d3 | 1134 | { |
efb63364 | 1135 | gfc_free_expr (e); |
a4d9b221 | 1136 | gfc_error ("Character %qs in string at %C is not representable " |
d393bbd7 | 1137 | "in character kind %d", gfc_print_wide_char (c), kind); |
8fc541d3 FXC |
1138 | return MATCH_ERROR; |
1139 | } | |
1140 | ||
00660189 | 1141 | *p++ = c; |
8fc541d3 | 1142 | } |
6de9cd9a DN |
1143 | |
1144 | *p = '\0'; /* TODO: C-style string is for development/debug purposes. */ | |
73e42eef | 1145 | warn_ampersand = save_warn_ampersand; |
6de9cd9a | 1146 | |
8fc541d3 FXC |
1147 | next_string_char (delimiter, &ret); |
1148 | if (ret != -1) | |
6de9cd9a DN |
1149 | gfc_internal_error ("match_string_constant(): Delimiter not found"); |
1150 | ||
38217d3e | 1151 | if (match_substring (NULL, 0, &e->ref, false) != MATCH_NO) |
6de9cd9a DN |
1152 | e->expr_type = EXPR_SUBSTRING; |
1153 | ||
1154 | *result = e; | |
1155 | ||
1156 | return MATCH_YES; | |
1157 | ||
1158 | no_match: | |
63645982 | 1159 | gfc_current_locus = old_locus; |
6de9cd9a DN |
1160 | return MATCH_NO; |
1161 | } | |
1162 | ||
1163 | ||
500f8f7b RS |
1164 | /* Match a .true. or .false. Returns 1 if a .true. was found, |
1165 | 0 if a .false. was found, and -1 otherwise. */ | |
1166 | static int | |
1167 | match_logical_constant_string (void) | |
1168 | { | |
1169 | locus orig_loc = gfc_current_locus; | |
1170 | ||
1171 | gfc_gobble_whitespace (); | |
8fc541d3 | 1172 | if (gfc_next_ascii_char () == '.') |
500f8f7b | 1173 | { |
8fc541d3 | 1174 | char ch = gfc_next_ascii_char (); |
500f8f7b RS |
1175 | if (ch == 'f') |
1176 | { | |
8fc541d3 FXC |
1177 | if (gfc_next_ascii_char () == 'a' |
1178 | && gfc_next_ascii_char () == 'l' | |
1179 | && gfc_next_ascii_char () == 's' | |
1180 | && gfc_next_ascii_char () == 'e' | |
1181 | && gfc_next_ascii_char () == '.') | |
500f8f7b RS |
1182 | /* Matched ".false.". */ |
1183 | return 0; | |
1184 | } | |
1185 | else if (ch == 't') | |
1186 | { | |
8fc541d3 FXC |
1187 | if (gfc_next_ascii_char () == 'r' |
1188 | && gfc_next_ascii_char () == 'u' | |
1189 | && gfc_next_ascii_char () == 'e' | |
1190 | && gfc_next_ascii_char () == '.') | |
500f8f7b RS |
1191 | /* Matched ".true.". */ |
1192 | return 1; | |
1193 | } | |
1194 | } | |
1195 | gfc_current_locus = orig_loc; | |
1196 | return -1; | |
1197 | } | |
1198 | ||
6de9cd9a DN |
1199 | /* Match a .true. or .false. */ |
1200 | ||
1201 | static match | |
edf1eac2 | 1202 | match_logical_constant (gfc_expr **result) |
6de9cd9a | 1203 | { |
6de9cd9a | 1204 | gfc_expr *e; |
bee64a2b | 1205 | int i, kind, is_iso_c; |
6de9cd9a | 1206 | |
500f8f7b | 1207 | i = match_logical_constant_string (); |
6de9cd9a DN |
1208 | if (i == -1) |
1209 | return MATCH_NO; | |
1210 | ||
bee64a2b | 1211 | kind = get_kind (&is_iso_c); |
6de9cd9a DN |
1212 | if (kind == -1) |
1213 | return MATCH_ERROR; | |
1214 | if (kind == -2) | |
9d64df18 | 1215 | kind = gfc_default_logical_kind; |
6de9cd9a | 1216 | |
e7a2d5fb | 1217 | if (gfc_validate_kind (BT_LOGICAL, kind, true) < 0) |
eb62be44 SK |
1218 | { |
1219 | gfc_error ("Bad kind for logical constant at %C"); | |
1220 | return MATCH_ERROR; | |
1221 | } | |
6de9cd9a | 1222 | |
b7e75771 | 1223 | e = gfc_get_logical_expr (kind, &gfc_current_locus, i); |
bee64a2b | 1224 | e->ts.is_c_interop = is_iso_c; |
6de9cd9a DN |
1225 | |
1226 | *result = e; | |
1227 | return MATCH_YES; | |
1228 | } | |
1229 | ||
1230 | ||
1231 | /* Match a real or imaginary part of a complex constant that is a | |
1232 | symbolic constant. */ | |
1233 | ||
1234 | static match | |
edf1eac2 | 1235 | match_sym_complex_part (gfc_expr **result) |
6de9cd9a DN |
1236 | { |
1237 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1238 | gfc_symbol *sym; | |
1239 | gfc_expr *e; | |
1240 | match m; | |
1241 | ||
1242 | m = gfc_match_name (name); | |
1243 | if (m != MATCH_YES) | |
1244 | return m; | |
1245 | ||
1246 | if (gfc_find_symbol (name, NULL, 1, &sym) || sym == NULL) | |
1247 | return MATCH_NO; | |
1248 | ||
1249 | if (sym->attr.flavor != FL_PARAMETER) | |
1250 | { | |
284ee475 | 1251 | /* Give the matcher for implied do-loops a chance to run. This yields |
a5fbc2f3 | 1252 | a much saner error message for "write(*,*) (i, i=1, 6" where the |
284ee475 SK |
1253 | right parenthesis is missing. */ |
1254 | char c; | |
1255 | gfc_gobble_whitespace (); | |
1256 | c = gfc_peek_ascii_char (); | |
1257 | if (c == '=' || c == ',') | |
1258 | { | |
1259 | m = MATCH_NO; | |
1260 | } | |
1261 | else | |
1262 | { | |
1263 | gfc_error ("Expected PARAMETER symbol in complex constant at %C"); | |
1264 | m = MATCH_ERROR; | |
1265 | } | |
1266 | return m; | |
6de9cd9a DN |
1267 | } |
1268 | ||
70db5f02 SK |
1269 | if (!sym->value) |
1270 | goto error; | |
1271 | ||
6de9cd9a DN |
1272 | if (!gfc_numeric_ts (&sym->value->ts)) |
1273 | { | |
1274 | gfc_error ("Numeric PARAMETER required in complex constant at %C"); | |
1275 | return MATCH_ERROR; | |
1276 | } | |
1277 | ||
1278 | if (sym->value->rank != 0) | |
1279 | { | |
1280 | gfc_error ("Scalar PARAMETER required in complex constant at %C"); | |
1281 | return MATCH_ERROR; | |
1282 | } | |
1283 | ||
524af0d6 JB |
1284 | if (!gfc_notify_std (GFC_STD_F2003, "PARAMETER symbol in " |
1285 | "complex constant at %C")) | |
e227ac57 FXC |
1286 | return MATCH_ERROR; |
1287 | ||
6de9cd9a DN |
1288 | switch (sym->value->ts.type) |
1289 | { | |
1290 | case BT_REAL: | |
1291 | e = gfc_copy_expr (sym->value); | |
1292 | break; | |
1293 | ||
1294 | case BT_COMPLEX: | |
1295 | e = gfc_complex2real (sym->value, sym->value->ts.kind); | |
1296 | if (e == NULL) | |
1297 | goto error; | |
1298 | break; | |
1299 | ||
1300 | case BT_INTEGER: | |
9d64df18 | 1301 | e = gfc_int2real (sym->value, gfc_default_real_kind); |
6de9cd9a DN |
1302 | if (e == NULL) |
1303 | goto error; | |
1304 | break; | |
1305 | ||
1306 | default: | |
1307 | gfc_internal_error ("gfc_match_sym_complex_part(): Bad type"); | |
1308 | } | |
1309 | ||
edf1eac2 | 1310 | *result = e; /* e is a scalar, real, constant expression. */ |
6de9cd9a DN |
1311 | return MATCH_YES; |
1312 | ||
1313 | error: | |
1314 | gfc_error ("Error converting PARAMETER constant in complex constant at %C"); | |
1315 | return MATCH_ERROR; | |
1316 | } | |
1317 | ||
1318 | ||
6de9cd9a DN |
1319 | /* Match a real or imaginary part of a complex number. */ |
1320 | ||
1321 | static match | |
edf1eac2 | 1322 | match_complex_part (gfc_expr **result) |
6de9cd9a DN |
1323 | { |
1324 | match m; | |
1325 | ||
1326 | m = match_sym_complex_part (result); | |
1327 | if (m != MATCH_NO) | |
1328 | return m; | |
1329 | ||
69029c61 PB |
1330 | m = match_real_constant (result, 1); |
1331 | if (m != MATCH_NO) | |
1332 | return m; | |
1333 | ||
1334 | return match_integer_constant (result, 1); | |
6de9cd9a DN |
1335 | } |
1336 | ||
1337 | ||
1338 | /* Try to match a complex constant. */ | |
1339 | ||
1340 | static match | |
edf1eac2 | 1341 | match_complex_constant (gfc_expr **result) |
6de9cd9a DN |
1342 | { |
1343 | gfc_expr *e, *real, *imag; | |
fea70c99 | 1344 | gfc_error_buffer old_error; |
6de9cd9a DN |
1345 | gfc_typespec target; |
1346 | locus old_loc; | |
1347 | int kind; | |
1348 | match m; | |
1349 | ||
63645982 | 1350 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1351 | real = imag = e = NULL; |
1352 | ||
1353 | m = gfc_match_char ('('); | |
1354 | if (m != MATCH_YES) | |
1355 | return m; | |
1356 | ||
fea70c99 | 1357 | gfc_push_error (&old_error); |
6de9cd9a DN |
1358 | |
1359 | m = match_complex_part (&real); | |
1360 | if (m == MATCH_NO) | |
d71b89ca | 1361 | { |
fea70c99 | 1362 | gfc_free_error (&old_error); |
d71b89ca JJ |
1363 | goto cleanup; |
1364 | } | |
6de9cd9a DN |
1365 | |
1366 | if (gfc_match_char (',') == MATCH_NO) | |
1367 | { | |
396e56d2 TK |
1368 | /* It is possible that gfc_int2real issued a warning when |
1369 | converting an integer to real. Throw this away here. */ | |
1370 | ||
1371 | gfc_clear_warning (); | |
fea70c99 | 1372 | gfc_pop_error (&old_error); |
6de9cd9a DN |
1373 | m = MATCH_NO; |
1374 | goto cleanup; | |
1375 | } | |
1376 | ||
1377 | /* If m is error, then something was wrong with the real part and we | |
1378 | assume we have a complex constant because we've seen the ','. An | |
1379 | ambiguous case here is the start of an iterator list of some | |
1380 | sort. These sort of lists are matched prior to coming here. */ | |
1381 | ||
1382 | if (m == MATCH_ERROR) | |
d71b89ca | 1383 | { |
fea70c99 | 1384 | gfc_free_error (&old_error); |
d71b89ca JJ |
1385 | goto cleanup; |
1386 | } | |
fea70c99 | 1387 | gfc_pop_error (&old_error); |
6de9cd9a DN |
1388 | |
1389 | m = match_complex_part (&imag); | |
1390 | if (m == MATCH_NO) | |
1391 | goto syntax; | |
1392 | if (m == MATCH_ERROR) | |
1393 | goto cleanup; | |
1394 | ||
1395 | m = gfc_match_char (')'); | |
1396 | if (m == MATCH_NO) | |
87ebdf2f SK |
1397 | { |
1398 | /* Give the matcher for implied do-loops a chance to run. This | |
1399 | yields a much saner error message for (/ (i, 4=i, 6) /). */ | |
8fc541d3 | 1400 | if (gfc_peek_ascii_char () == '=') |
87ebdf2f SK |
1401 | { |
1402 | m = MATCH_ERROR; | |
1403 | goto cleanup; | |
1404 | } | |
1405 | else | |
6de9cd9a | 1406 | goto syntax; |
87ebdf2f | 1407 | } |
6de9cd9a DN |
1408 | |
1409 | if (m == MATCH_ERROR) | |
1410 | goto cleanup; | |
1411 | ||
1412 | /* Decide on the kind of this complex number. */ | |
69029c61 PB |
1413 | if (real->ts.type == BT_REAL) |
1414 | { | |
1415 | if (imag->ts.type == BT_REAL) | |
1416 | kind = gfc_kind_max (real, imag); | |
1417 | else | |
1418 | kind = real->ts.kind; | |
1419 | } | |
1420 | else | |
1421 | { | |
1422 | if (imag->ts.type == BT_REAL) | |
1423 | kind = imag->ts.kind; | |
1424 | else | |
1425 | kind = gfc_default_real_kind; | |
1426 | } | |
d91909c0 | 1427 | gfc_clear_ts (&target); |
6de9cd9a DN |
1428 | target.type = BT_REAL; |
1429 | target.kind = kind; | |
1430 | ||
69029c61 | 1431 | if (real->ts.type != BT_REAL || kind != real->ts.kind) |
6de9cd9a | 1432 | gfc_convert_type (real, &target, 2); |
69029c61 | 1433 | if (imag->ts.type != BT_REAL || kind != imag->ts.kind) |
6de9cd9a DN |
1434 | gfc_convert_type (imag, &target, 2); |
1435 | ||
1436 | e = gfc_convert_complex (real, imag, kind); | |
63645982 | 1437 | e->where = gfc_current_locus; |
6de9cd9a DN |
1438 | |
1439 | gfc_free_expr (real); | |
1440 | gfc_free_expr (imag); | |
1441 | ||
1442 | *result = e; | |
1443 | return MATCH_YES; | |
1444 | ||
1445 | syntax: | |
1446 | gfc_error ("Syntax error in COMPLEX constant at %C"); | |
1447 | m = MATCH_ERROR; | |
1448 | ||
1449 | cleanup: | |
1450 | gfc_free_expr (e); | |
1451 | gfc_free_expr (real); | |
1452 | gfc_free_expr (imag); | |
63645982 | 1453 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1454 | |
1455 | return m; | |
1456 | } | |
1457 | ||
1458 | ||
1459 | /* Match constants in any of several forms. Returns nonzero for a | |
1460 | match, zero for no match. */ | |
1461 | ||
1462 | match | |
edf1eac2 | 1463 | gfc_match_literal_constant (gfc_expr **result, int signflag) |
6de9cd9a DN |
1464 | { |
1465 | match m; | |
1466 | ||
1467 | m = match_complex_constant (result); | |
1468 | if (m != MATCH_NO) | |
1469 | return m; | |
1470 | ||
1471 | m = match_string_constant (result); | |
1472 | if (m != MATCH_NO) | |
1473 | return m; | |
1474 | ||
1475 | m = match_boz_constant (result); | |
1476 | if (m != MATCH_NO) | |
1477 | return m; | |
1478 | ||
1479 | m = match_real_constant (result, signflag); | |
1480 | if (m != MATCH_NO) | |
1481 | return m; | |
1482 | ||
d3642f89 FW |
1483 | m = match_hollerith_constant (result); |
1484 | if (m != MATCH_NO) | |
1485 | return m; | |
1486 | ||
6de9cd9a DN |
1487 | m = match_integer_constant (result, signflag); |
1488 | if (m != MATCH_NO) | |
1489 | return m; | |
1490 | ||
1491 | m = match_logical_constant (result); | |
1492 | if (m != MATCH_NO) | |
1493 | return m; | |
1494 | ||
1495 | return MATCH_NO; | |
1496 | } | |
1497 | ||
1498 | ||
2d71b918 JW |
1499 | /* This checks if a symbol is the return value of an encompassing function. |
1500 | Function nesting can be maximally two levels deep, but we may have | |
1501 | additional local namespaces like BLOCK etc. */ | |
1502 | ||
1503 | bool | |
1504 | gfc_is_function_return_value (gfc_symbol *sym, gfc_namespace *ns) | |
1505 | { | |
1506 | if (!sym->attr.function || (sym->result != sym)) | |
1507 | return false; | |
1508 | while (ns) | |
1509 | { | |
1510 | if (ns->proc_name == sym) | |
1511 | return true; | |
1512 | ns = ns->parent; | |
1513 | } | |
1514 | return false; | |
1515 | } | |
1516 | ||
1517 | ||
6de9cd9a DN |
1518 | /* Match a single actual argument value. An actual argument is |
1519 | usually an expression, but can also be a procedure name. If the | |
1520 | argument is a single name, it is not always possible to tell | |
1521 | whether the name is a dummy procedure or not. We treat these cases | |
1522 | by creating an argument that looks like a dummy procedure and | |
1523 | fixing things later during resolution. */ | |
1524 | ||
1525 | static match | |
edf1eac2 | 1526 | match_actual_arg (gfc_expr **result) |
6de9cd9a DN |
1527 | { |
1528 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1529 | gfc_symtree *symtree; | |
1530 | locus where, w; | |
1531 | gfc_expr *e; | |
8fc541d3 | 1532 | char c; |
6de9cd9a | 1533 | |
618f4f46 | 1534 | gfc_gobble_whitespace (); |
63645982 | 1535 | where = gfc_current_locus; |
6de9cd9a DN |
1536 | |
1537 | switch (gfc_match_name (name)) | |
1538 | { | |
1539 | case MATCH_ERROR: | |
1540 | return MATCH_ERROR; | |
1541 | ||
1542 | case MATCH_NO: | |
1543 | break; | |
1544 | ||
1545 | case MATCH_YES: | |
63645982 | 1546 | w = gfc_current_locus; |
6de9cd9a | 1547 | gfc_gobble_whitespace (); |
8fc541d3 | 1548 | c = gfc_next_ascii_char (); |
63645982 | 1549 | gfc_current_locus = w; |
6de9cd9a DN |
1550 | |
1551 | if (c != ',' && c != ')') | |
1552 | break; | |
1553 | ||
1554 | if (gfc_find_sym_tree (name, NULL, 1, &symtree)) | |
1555 | break; | |
1556 | /* Handle error elsewhere. */ | |
1557 | ||
1558 | /* Eliminate a couple of common cases where we know we don't | |
edf1eac2 | 1559 | have a function argument. */ |
6de9cd9a | 1560 | if (symtree == NULL) |
edf1eac2 | 1561 | { |
08a6b8e0 | 1562 | gfc_get_sym_tree (name, NULL, &symtree, false); |
edf1eac2 SK |
1563 | gfc_set_sym_referenced (symtree->n.sym); |
1564 | } | |
6de9cd9a DN |
1565 | else |
1566 | { | |
edf1eac2 | 1567 | gfc_symbol *sym; |
6de9cd9a | 1568 | |
edf1eac2 SK |
1569 | sym = symtree->n.sym; |
1570 | gfc_set_sym_referenced (sym); | |
c0f0e35a JD |
1571 | if (sym->attr.flavor == FL_NAMELIST) |
1572 | { | |
67914693 | 1573 | gfc_error ("Namelist %qs cannot be an argument at %L", |
c0f0e35a JD |
1574 | sym->name, &where); |
1575 | break; | |
1576 | } | |
6de9cd9a DN |
1577 | if (sym->attr.flavor != FL_PROCEDURE |
1578 | && sym->attr.flavor != FL_UNKNOWN) | |
1579 | break; | |
1580 | ||
6f9c9d6d TB |
1581 | if (sym->attr.in_common && !sym->attr.proc_pointer) |
1582 | { | |
bf1b77dd | 1583 | if (!gfc_add_flavor (&sym->attr, FL_VARIABLE, |
524af0d6 | 1584 | sym->name, &sym->declared_at)) |
efb63364 | 1585 | return MATCH_ERROR; |
6f9c9d6d TB |
1586 | break; |
1587 | } | |
1588 | ||
6de9cd9a DN |
1589 | /* If the symbol is a function with itself as the result and |
1590 | is being defined, then we have a variable. */ | |
7a4ef45b JJ |
1591 | if (sym->attr.function && sym->result == sym) |
1592 | { | |
2d71b918 | 1593 | if (gfc_is_function_return_value (sym, gfc_current_ns)) |
7a4ef45b JJ |
1594 | break; |
1595 | ||
1596 | if (sym->attr.entry | |
1597 | && (sym->ns == gfc_current_ns | |
1598 | || sym->ns == gfc_current_ns->parent)) | |
1599 | { | |
1600 | gfc_entry_list *el = NULL; | |
1601 | ||
1602 | for (el = sym->ns->entries; el; el = el->next) | |
1603 | if (sym == el->sym) | |
1604 | break; | |
1605 | ||
1606 | if (el) | |
1607 | break; | |
1608 | } | |
1609 | } | |
6de9cd9a DN |
1610 | } |
1611 | ||
1612 | e = gfc_get_expr (); /* Leave it unknown for now */ | |
1613 | e->symtree = symtree; | |
1614 | e->expr_type = EXPR_VARIABLE; | |
1615 | e->ts.type = BT_PROCEDURE; | |
1616 | e->where = where; | |
1617 | ||
1618 | *result = e; | |
1619 | return MATCH_YES; | |
1620 | } | |
1621 | ||
63645982 | 1622 | gfc_current_locus = where; |
6de9cd9a DN |
1623 | return gfc_match_expr (result); |
1624 | } | |
1625 | ||
1626 | ||
5bab4c96 | 1627 | /* Match a keyword argument or type parameter spec list.. */ |
6de9cd9a DN |
1628 | |
1629 | static match | |
5bab4c96 | 1630 | match_keyword_arg (gfc_actual_arglist *actual, gfc_actual_arglist *base, bool pdt) |
6de9cd9a DN |
1631 | { |
1632 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1633 | gfc_actual_arglist *a; | |
1634 | locus name_locus; | |
1635 | match m; | |
1636 | ||
63645982 | 1637 | name_locus = gfc_current_locus; |
6de9cd9a DN |
1638 | m = gfc_match_name (name); |
1639 | ||
1640 | if (m != MATCH_YES) | |
1641 | goto cleanup; | |
1642 | if (gfc_match_char ('=') != MATCH_YES) | |
1643 | { | |
1644 | m = MATCH_NO; | |
1645 | goto cleanup; | |
1646 | } | |
1647 | ||
5bab4c96 PT |
1648 | if (pdt) |
1649 | { | |
1650 | if (gfc_match_char ('*') == MATCH_YES) | |
1651 | { | |
1652 | actual->spec_type = SPEC_ASSUMED; | |
1653 | goto add_name; | |
1654 | } | |
1655 | else if (gfc_match_char (':') == MATCH_YES) | |
1656 | { | |
1657 | actual->spec_type = SPEC_DEFERRED; | |
1658 | goto add_name; | |
1659 | } | |
1660 | else | |
1661 | actual->spec_type = SPEC_EXPLICIT; | |
1662 | } | |
1663 | ||
6de9cd9a DN |
1664 | m = match_actual_arg (&actual->expr); |
1665 | if (m != MATCH_YES) | |
1666 | goto cleanup; | |
1667 | ||
1668 | /* Make sure this name has not appeared yet. */ | |
5bab4c96 | 1669 | add_name: |
6de9cd9a DN |
1670 | if (name[0] != '\0') |
1671 | { | |
1672 | for (a = base; a; a = a->next) | |
cb9e4f55 | 1673 | if (a->name != NULL && strcmp (a->name, name) == 0) |
6de9cd9a | 1674 | { |
a4d9b221 | 1675 | gfc_error ("Keyword %qs at %C has already appeared in the " |
edf1eac2 | 1676 | "current argument list", name); |
6de9cd9a DN |
1677 | return MATCH_ERROR; |
1678 | } | |
1679 | } | |
1680 | ||
51f03c6b | 1681 | actual->name = gfc_get_string ("%s", name); |
6de9cd9a DN |
1682 | return MATCH_YES; |
1683 | ||
1684 | cleanup: | |
63645982 | 1685 | gfc_current_locus = name_locus; |
6de9cd9a DN |
1686 | return m; |
1687 | } | |
1688 | ||
1689 | ||
7fcafa71 PT |
1690 | /* Match an argument list function, such as %VAL. */ |
1691 | ||
1692 | static match | |
1693 | match_arg_list_function (gfc_actual_arglist *result) | |
1694 | { | |
1695 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1696 | locus old_locus; | |
1697 | match m; | |
1698 | ||
1699 | old_locus = gfc_current_locus; | |
1700 | ||
1701 | if (gfc_match_char ('%') != MATCH_YES) | |
1702 | { | |
1703 | m = MATCH_NO; | |
1704 | goto cleanup; | |
1705 | } | |
1706 | ||
1707 | m = gfc_match ("%n (", name); | |
1708 | if (m != MATCH_YES) | |
1709 | goto cleanup; | |
1710 | ||
1711 | if (name[0] != '\0') | |
1712 | { | |
1713 | switch (name[0]) | |
1714 | { | |
1715 | case 'l': | |
2eb3745a | 1716 | if (gfc_str_startswith (name, "loc")) |
7fcafa71 PT |
1717 | { |
1718 | result->name = "%LOC"; | |
1719 | break; | |
1720 | } | |
191816a3 | 1721 | /* FALLTHRU */ |
7fcafa71 | 1722 | case 'r': |
2eb3745a | 1723 | if (gfc_str_startswith (name, "ref")) |
7fcafa71 PT |
1724 | { |
1725 | result->name = "%REF"; | |
1726 | break; | |
1727 | } | |
191816a3 | 1728 | /* FALLTHRU */ |
7fcafa71 | 1729 | case 'v': |
2eb3745a | 1730 | if (gfc_str_startswith (name, "val")) |
7fcafa71 PT |
1731 | { |
1732 | result->name = "%VAL"; | |
1733 | break; | |
1734 | } | |
191816a3 | 1735 | /* FALLTHRU */ |
7fcafa71 PT |
1736 | default: |
1737 | m = MATCH_ERROR; | |
1738 | goto cleanup; | |
1739 | } | |
1740 | } | |
1741 | ||
524af0d6 | 1742 | if (!gfc_notify_std (GFC_STD_GNU, "argument list function at %C")) |
7fcafa71 PT |
1743 | { |
1744 | m = MATCH_ERROR; | |
1745 | goto cleanup; | |
1746 | } | |
1747 | ||
1748 | m = match_actual_arg (&result->expr); | |
1749 | if (m != MATCH_YES) | |
1750 | goto cleanup; | |
1751 | ||
1752 | if (gfc_match_char (')') != MATCH_YES) | |
1753 | { | |
1754 | m = MATCH_NO; | |
1755 | goto cleanup; | |
1756 | } | |
1757 | ||
1758 | return MATCH_YES; | |
1759 | ||
1760 | cleanup: | |
1761 | gfc_current_locus = old_locus; | |
1762 | return m; | |
1763 | } | |
1764 | ||
1765 | ||
6de9cd9a DN |
1766 | /* Matches an actual argument list of a function or subroutine, from |
1767 | the opening parenthesis to the closing parenthesis. The argument | |
1768 | list is assumed to allow keyword arguments because we don't know if | |
1769 | the symbol associated with the procedure has an implicit interface | |
ed5ee445 | 1770 | or not. We make sure keywords are unique. If sub_flag is set, |
5bab4c96 PT |
1771 | we're matching the argument list of a subroutine. |
1772 | ||
1773 | NOTE: An alternative use for this function is to match type parameter | |
1774 | spec lists, which are so similar to actual argument lists that the | |
1775 | machinery can be reused. This use is flagged by the optional argument | |
1776 | 'pdt'. */ | |
6de9cd9a DN |
1777 | |
1778 | match | |
5bab4c96 | 1779 | gfc_match_actual_arglist (int sub_flag, gfc_actual_arglist **argp, bool pdt) |
6de9cd9a DN |
1780 | { |
1781 | gfc_actual_arglist *head, *tail; | |
1782 | int seen_keyword; | |
1783 | gfc_st_label *label; | |
1784 | locus old_loc; | |
1785 | match m; | |
1786 | ||
1787 | *argp = tail = NULL; | |
63645982 | 1788 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1789 | |
1790 | seen_keyword = 0; | |
1791 | ||
1792 | if (gfc_match_char ('(') == MATCH_NO) | |
1793 | return (sub_flag) ? MATCH_YES : MATCH_NO; | |
1794 | ||
1795 | if (gfc_match_char (')') == MATCH_YES) | |
1796 | return MATCH_YES; | |
5bab4c96 | 1797 | |
6de9cd9a DN |
1798 | head = NULL; |
1799 | ||
837c4b78 JW |
1800 | matching_actual_arglist++; |
1801 | ||
6de9cd9a DN |
1802 | for (;;) |
1803 | { | |
1804 | if (head == NULL) | |
1805 | head = tail = gfc_get_actual_arglist (); | |
1806 | else | |
1807 | { | |
1808 | tail->next = gfc_get_actual_arglist (); | |
1809 | tail = tail->next; | |
1810 | } | |
1811 | ||
5bab4c96 | 1812 | if (sub_flag && !pdt && gfc_match_char ('*') == MATCH_YES) |
6de9cd9a | 1813 | { |
a34a91f0 | 1814 | m = gfc_match_st_label (&label); |
6de9cd9a DN |
1815 | if (m == MATCH_NO) |
1816 | gfc_error ("Expected alternate return label at %C"); | |
1817 | if (m != MATCH_YES) | |
1818 | goto cleanup; | |
1819 | ||
524af0d6 JB |
1820 | if (!gfc_notify_std (GFC_STD_F95_OBS, "Alternate-return argument " |
1821 | "at %C")) | |
fbdeeaac JW |
1822 | goto cleanup; |
1823 | ||
6de9cd9a DN |
1824 | tail->label = label; |
1825 | goto next; | |
1826 | } | |
1827 | ||
5bab4c96 PT |
1828 | if (pdt && !seen_keyword) |
1829 | { | |
1830 | if (gfc_match_char (':') == MATCH_YES) | |
1831 | { | |
1832 | tail->spec_type = SPEC_DEFERRED; | |
1833 | goto next; | |
1834 | } | |
1835 | else if (gfc_match_char ('*') == MATCH_YES) | |
1836 | { | |
1837 | tail->spec_type = SPEC_ASSUMED; | |
1838 | goto next; | |
1839 | } | |
1840 | else | |
1841 | tail->spec_type = SPEC_EXPLICIT; | |
18a4e7e3 PT |
1842 | |
1843 | m = match_keyword_arg (tail, head, pdt); | |
1844 | if (m == MATCH_YES) | |
1845 | { | |
1846 | seen_keyword = 1; | |
1847 | goto next; | |
1848 | } | |
1849 | if (m == MATCH_ERROR) | |
1850 | goto cleanup; | |
5bab4c96 PT |
1851 | } |
1852 | ||
6de9cd9a | 1853 | /* After the first keyword argument is seen, the following |
edf1eac2 | 1854 | arguments must also have keywords. */ |
6de9cd9a DN |
1855 | if (seen_keyword) |
1856 | { | |
5bab4c96 | 1857 | m = match_keyword_arg (tail, head, pdt); |
6de9cd9a DN |
1858 | |
1859 | if (m == MATCH_ERROR) | |
1860 | goto cleanup; | |
1861 | if (m == MATCH_NO) | |
1862 | { | |
edf1eac2 | 1863 | gfc_error ("Missing keyword name in actual argument list at %C"); |
6de9cd9a DN |
1864 | goto cleanup; |
1865 | } | |
1866 | ||
1867 | } | |
1868 | else | |
1869 | { | |
7fcafa71 PT |
1870 | /* Try an argument list function, like %VAL. */ |
1871 | m = match_arg_list_function (tail); | |
6de9cd9a DN |
1872 | if (m == MATCH_ERROR) |
1873 | goto cleanup; | |
1874 | ||
7fcafa71 PT |
1875 | /* See if we have the first keyword argument. */ |
1876 | if (m == MATCH_NO) | |
1877 | { | |
5bab4c96 | 1878 | m = match_keyword_arg (tail, head, false); |
7fcafa71 PT |
1879 | if (m == MATCH_YES) |
1880 | seen_keyword = 1; | |
1881 | if (m == MATCH_ERROR) | |
1882 | goto cleanup; | |
1883 | } | |
1884 | ||
6de9cd9a DN |
1885 | if (m == MATCH_NO) |
1886 | { | |
1887 | /* Try for a non-keyword argument. */ | |
1888 | m = match_actual_arg (&tail->expr); | |
1889 | if (m == MATCH_ERROR) | |
1890 | goto cleanup; | |
1891 | if (m == MATCH_NO) | |
1892 | goto syntax; | |
1893 | } | |
1894 | } | |
1895 | ||
7fcafa71 | 1896 | |
6de9cd9a DN |
1897 | next: |
1898 | if (gfc_match_char (')') == MATCH_YES) | |
1899 | break; | |
1900 | if (gfc_match_char (',') != MATCH_YES) | |
1901 | goto syntax; | |
1902 | } | |
1903 | ||
1904 | *argp = head; | |
837c4b78 | 1905 | matching_actual_arglist--; |
6de9cd9a DN |
1906 | return MATCH_YES; |
1907 | ||
1908 | syntax: | |
1909 | gfc_error ("Syntax error in argument list at %C"); | |
1910 | ||
1911 | cleanup: | |
1912 | gfc_free_actual_arglist (head); | |
63645982 | 1913 | gfc_current_locus = old_loc; |
837c4b78 | 1914 | matching_actual_arglist--; |
6de9cd9a DN |
1915 | return MATCH_ERROR; |
1916 | } | |
1917 | ||
1918 | ||
8e1f752a | 1919 | /* Used by gfc_match_varspec() to extend the reference list by one |
6de9cd9a DN |
1920 | element. */ |
1921 | ||
1922 | static gfc_ref * | |
edf1eac2 | 1923 | extend_ref (gfc_expr *primary, gfc_ref *tail) |
6de9cd9a | 1924 | { |
6de9cd9a DN |
1925 | if (primary->ref == NULL) |
1926 | primary->ref = tail = gfc_get_ref (); | |
1927 | else | |
1928 | { | |
1929 | if (tail == NULL) | |
1930 | gfc_internal_error ("extend_ref(): Bad tail"); | |
1931 | tail->next = gfc_get_ref (); | |
1932 | tail = tail->next; | |
1933 | } | |
1934 | ||
1935 | return tail; | |
1936 | } | |
1937 | ||
1938 | ||
a5fbc2f3 PT |
1939 | /* Used by gfc_match_varspec() to match an inquiry reference. */ |
1940 | ||
1941 | static bool | |
1942 | is_inquiry_ref (const char *name, gfc_ref **ref) | |
1943 | { | |
1944 | inquiry_type type; | |
1945 | ||
1946 | if (name == NULL) | |
1947 | return false; | |
1948 | ||
1949 | if (ref) *ref = NULL; | |
1950 | ||
1951 | if (strcmp (name, "re") == 0) | |
1952 | type = INQUIRY_RE; | |
1953 | else if (strcmp (name, "im") == 0) | |
1954 | type = INQUIRY_IM; | |
1955 | else if (strcmp (name, "kind") == 0) | |
1956 | type = INQUIRY_KIND; | |
1957 | else if (strcmp (name, "len") == 0) | |
1958 | type = INQUIRY_LEN; | |
1959 | else | |
1960 | return false; | |
1961 | ||
1962 | if (ref) | |
1963 | { | |
1964 | *ref = gfc_get_ref (); | |
1965 | (*ref)->type = REF_INQUIRY; | |
1966 | (*ref)->u.i = type; | |
1967 | } | |
1968 | ||
1969 | return true; | |
1970 | } | |
1971 | ||
1972 | ||
6de9cd9a DN |
1973 | /* Match any additional specifications associated with the current |
1974 | variable like member references or substrings. If equiv_flag is | |
1975 | set we only match stuff that is allowed inside an EQUIVALENCE | |
8e1f752a | 1976 | statement. sub_flag tells whether we expect a type-bound procedure found |
713485cc JW |
1977 | to be a subroutine as part of CALL or a FUNCTION. For procedure pointer |
1978 | components, 'ppc_arg' determines whether the PPC may be called (with an | |
1979 | argument list), or whether it may just be referred to as a pointer. */ | |
6de9cd9a | 1980 | |
8e1f752a | 1981 | match |
713485cc JW |
1982 | gfc_match_varspec (gfc_expr *primary, int equiv_flag, bool sub_flag, |
1983 | bool ppc_arg) | |
6de9cd9a DN |
1984 | { |
1985 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
f6288c24 | 1986 | gfc_ref *substring, *tail, *tmp; |
6de9cd9a | 1987 | gfc_component *component; |
a8006d09 | 1988 | gfc_symbol *sym = primary->symtree->n.sym; |
b89a63b9 | 1989 | gfc_expr *tgt_expr = NULL; |
6de9cd9a | 1990 | match m; |
f2d3cb25 | 1991 | bool unknown; |
a5fbc2f3 PT |
1992 | bool inquiry; |
1993 | locus old_loc; | |
f6288c24 | 1994 | char sep; |
6de9cd9a DN |
1995 | |
1996 | tail = NULL; | |
1997 | ||
3c721513 | 1998 | gfc_gobble_whitespace (); |
d3a9eea2 TB |
1999 | |
2000 | if (gfc_peek_ascii_char () == '[') | |
2001 | { | |
c49ea23d PT |
2002 | if ((sym->ts.type != BT_CLASS && sym->attr.dimension) |
2003 | || (sym->ts.type == BT_CLASS && CLASS_DATA (sym) | |
2004 | && CLASS_DATA (sym)->attr.dimension)) | |
d3a9eea2 TB |
2005 | { |
2006 | gfc_error ("Array section designator, e.g. '(:)', is required " | |
2007 | "besides the coarray designator '[...]' at %C"); | |
2008 | return MATCH_ERROR; | |
2009 | } | |
c49ea23d PT |
2010 | if ((sym->ts.type != BT_CLASS && !sym->attr.codimension) |
2011 | || (sym->ts.type == BT_CLASS && CLASS_DATA (sym) | |
2012 | && !CLASS_DATA (sym)->attr.codimension)) | |
d3a9eea2 | 2013 | { |
a4d9b221 | 2014 | gfc_error ("Coarray designator at %C but %qs is not a coarray", |
d3a9eea2 TB |
2015 | sym->name); |
2016 | return MATCH_ERROR; | |
2017 | } | |
2018 | } | |
2019 | ||
b89a63b9 PT |
2020 | if (sym->assoc && sym->assoc->target) |
2021 | tgt_expr = sym->assoc->target; | |
2022 | ||
52bf62f9 | 2023 | /* For associate names, we may not yet know whether they are arrays or not. |
b125dc1e PT |
2024 | If the selector expression is unambiguously an array; eg. a full array |
2025 | or an array section, then the associate name must be an array and we can | |
2026 | fix it now. Otherwise, if parentheses follow and it is not a character | |
2027 | type, we have to assume that it actually is one for now. The final | |
2028 | decision will be made at resolution, of course. */ | |
2029 | if (sym->assoc | |
2030 | && gfc_peek_ascii_char () == '(' | |
2031 | && sym->ts.type != BT_CLASS | |
2032 | && !sym->attr.dimension) | |
2033 | { | |
b89a63b9 PT |
2034 | gfc_ref *ref = NULL; |
2035 | ||
2036 | if (!sym->assoc->dangling && tgt_expr) | |
2037 | { | |
2038 | if (tgt_expr->expr_type == EXPR_VARIABLE) | |
2039 | gfc_resolve_expr (tgt_expr); | |
2040 | ||
2041 | ref = tgt_expr->ref; | |
2042 | for (; ref; ref = ref->next) | |
2043 | if (ref->type == REF_ARRAY | |
2044 | && (ref->u.ar.type == AR_FULL | |
2045 | || ref->u.ar.type == AR_SECTION)) | |
2046 | break; | |
2047 | } | |
2048 | ||
2049 | if (ref || (!(sym->assoc->dangling || sym->ts.type == BT_CHARACTER) | |
2050 | && sym->assoc->st | |
2051 | && sym->assoc->st->n.sym | |
2052 | && sym->assoc->st->n.sym->attr.dimension == 0)) | |
b125dc1e | 2053 | { |
b89a63b9 PT |
2054 | sym->attr.dimension = 1; |
2055 | if (sym->as == NULL | |
b125dc1e PT |
2056 | && sym->assoc->st |
2057 | && sym->assoc->st->n.sym | |
2058 | && sym->assoc->st->n.sym->as) | |
2059 | sym->as = gfc_copy_array_spec (sym->assoc->st->n.sym->as); | |
2060 | } | |
2061 | } | |
b89a63b9 PT |
2062 | else if (sym->ts.type == BT_CLASS |
2063 | && tgt_expr | |
2064 | && tgt_expr->expr_type == EXPR_VARIABLE | |
2065 | && sym->ts.u.derived != tgt_expr->ts.u.derived) | |
2066 | { | |
2067 | gfc_resolve_expr (tgt_expr); | |
2068 | if (tgt_expr->rank) | |
2069 | sym->ts.u.derived = tgt_expr->ts.u.derived; | |
2070 | } | |
52bf62f9 | 2071 | |
c74b74a8 | 2072 | if ((equiv_flag && gfc_peek_ascii_char () == '(') |
d3a9eea2 | 2073 | || gfc_peek_ascii_char () == '[' || sym->attr.codimension |
ce2ab24c | 2074 | || (sym->attr.dimension && sym->ts.type != BT_CLASS |
2a573572 | 2075 | && !sym->attr.proc_pointer && !gfc_is_proc_ptr_comp (primary) |
f64edc8b | 2076 | && !(gfc_matching_procptr_assignment |
cf2b3c22 | 2077 | && sym->attr.flavor == FL_PROCEDURE)) |
22061030 | 2078 | || (sym->ts.type == BT_CLASS && sym->attr.class_ok |
492792ed TB |
2079 | && (CLASS_DATA (sym)->attr.dimension |
2080 | || CLASS_DATA (sym)->attr.codimension))) | |
6de9cd9a | 2081 | { |
102344e2 TB |
2082 | gfc_array_spec *as; |
2083 | ||
2084 | tail = extend_ref (primary, tail); | |
2085 | tail->type = REF_ARRAY; | |
2086 | ||
a8006d09 JJ |
2087 | /* In EQUIVALENCE, we don't know yet whether we are seeing |
2088 | an array, character variable or array of character | |
edf1eac2 | 2089 | variables. We'll leave the decision till resolve time. */ |
6de9cd9a | 2090 | |
102344e2 TB |
2091 | if (equiv_flag) |
2092 | as = NULL; | |
2093 | else if (sym->ts.type == BT_CLASS && CLASS_DATA (sym)) | |
2094 | as = CLASS_DATA (sym)->as; | |
2095 | else | |
2096 | as = sym->as; | |
2097 | ||
2098 | m = gfc_match_array_ref (&tail->u.ar, as, equiv_flag, | |
2099 | as ? as->corank : 0); | |
6de9cd9a DN |
2100 | if (m != MATCH_YES) |
2101 | return m; | |
a8006d09 | 2102 | |
3c721513 | 2103 | gfc_gobble_whitespace (); |
8fc541d3 | 2104 | if (equiv_flag && gfc_peek_ascii_char () == '(') |
a8006d09 JJ |
2105 | { |
2106 | tail = extend_ref (primary, tail); | |
2107 | tail->type = REF_ARRAY; | |
2108 | ||
d3a9eea2 | 2109 | m = gfc_match_array_ref (&tail->u.ar, NULL, equiv_flag, 0); |
a8006d09 JJ |
2110 | if (m != MATCH_YES) |
2111 | return m; | |
2112 | } | |
6de9cd9a DN |
2113 | } |
2114 | ||
6de9cd9a DN |
2115 | primary->ts = sym->ts; |
2116 | ||
a8006d09 JJ |
2117 | if (equiv_flag) |
2118 | return MATCH_YES; | |
2119 | ||
f6288c24 FR |
2120 | /* With DEC extensions, member separator may be '.' or '%'. */ |
2121 | sep = gfc_peek_ascii_char (); | |
2122 | m = gfc_match_member_sep (sym); | |
2123 | if (m == MATCH_ERROR) | |
2124 | return MATCH_ERROR; | |
2125 | ||
a5fbc2f3 PT |
2126 | inquiry = false; |
2127 | if (m == MATCH_YES && sep == '%' | |
2128 | && primary->ts.type != BT_CLASS | |
2129 | && primary->ts.type != BT_DERIVED) | |
2130 | { | |
2131 | match mm; | |
2132 | old_loc = gfc_current_locus; | |
2133 | mm = gfc_match_name (name); | |
2134 | if (mm == MATCH_YES && is_inquiry_ref (name, &tmp)) | |
2135 | inquiry = true; | |
2136 | gfc_current_locus = old_loc; | |
2137 | } | |
2138 | ||
f6288c24 | 2139 | if (sym->ts.type == BT_UNKNOWN && m == MATCH_YES |
713485cc | 2140 | && gfc_get_default_type (sym->name, sym->ns)->type == BT_DERIVED) |
ebac6d9c DK |
2141 | gfc_set_default_type (sym, 0, sym->ns); |
2142 | ||
b89a63b9 | 2143 | /* See if there is a usable typespec in the "no IMPLICIT type" error. */ |
f6288c24 | 2144 | if (sym->ts.type == BT_UNKNOWN && m == MATCH_YES) |
6ee65df3 | 2145 | { |
b89a63b9 PT |
2146 | bool permissible; |
2147 | ||
a8399af8 | 2148 | /* These target expressions can be resolved at any time. */ |
b89a63b9 PT |
2149 | permissible = tgt_expr && tgt_expr->symtree && tgt_expr->symtree->n.sym |
2150 | && (tgt_expr->symtree->n.sym->attr.use_assoc | |
2151 | || tgt_expr->symtree->n.sym->attr.host_assoc | |
2152 | || tgt_expr->symtree->n.sym->attr.if_source | |
2153 | == IFSRC_DECL); | |
2154 | permissible = permissible | |
2155 | || (tgt_expr && tgt_expr->expr_type == EXPR_OP); | |
2156 | ||
2157 | if (permissible) | |
62d3c075 | 2158 | { |
b89a63b9 PT |
2159 | gfc_resolve_expr (tgt_expr); |
2160 | sym->ts = tgt_expr->ts; | |
62d3c075 PT |
2161 | } |
2162 | ||
2163 | if (sym->ts.type == BT_UNKNOWN) | |
2164 | { | |
2165 | gfc_error ("Symbol %qs at %C has no IMPLICIT type", sym->name); | |
2166 | return MATCH_ERROR; | |
2167 | } | |
6ee65df3 TB |
2168 | } |
2169 | else if ((sym->ts.type != BT_DERIVED && sym->ts.type != BT_CLASS) | |
a5fbc2f3 | 2170 | && m == MATCH_YES && !inquiry) |
6ee65df3 | 2171 | { |
f6288c24 FR |
2172 | gfc_error ("Unexpected %<%c%> for nonderived-type variable %qs at %C", |
2173 | sep, sym->name); | |
6ee65df3 TB |
2174 | return MATCH_ERROR; |
2175 | } | |
2176 | ||
a5fbc2f3 | 2177 | if ((sym->ts.type != BT_DERIVED && sym->ts.type != BT_CLASS && !inquiry) |
f6288c24 | 2178 | || m != MATCH_YES) |
6de9cd9a DN |
2179 | goto check_substring; |
2180 | ||
a5fbc2f3 PT |
2181 | if (!inquiry) |
2182 | sym = sym->ts.u.derived; | |
2183 | else | |
2184 | sym = NULL; | |
6de9cd9a DN |
2185 | |
2186 | for (;;) | |
2187 | { | |
524af0d6 | 2188 | bool t; |
e157f736 | 2189 | gfc_symtree *tbp; |
8e1f752a | 2190 | |
6de9cd9a DN |
2191 | m = gfc_match_name (name); |
2192 | if (m == MATCH_NO) | |
2193 | gfc_error ("Expected structure component name at %C"); | |
2194 | if (m != MATCH_YES) | |
2195 | return MATCH_ERROR; | |
2196 | ||
a5fbc2f3 PT |
2197 | if (primary->ts.type != BT_CLASS && primary->ts.type != BT_DERIVED) |
2198 | { | |
2199 | inquiry = is_inquiry_ref (name, &tmp); | |
2200 | if (inquiry) | |
2201 | sym = NULL; | |
2202 | } | |
2203 | else | |
2204 | inquiry = false; | |
2205 | ||
d5c50b02 | 2206 | if (sym && sym->f2k_derived) |
b2acf594 PT |
2207 | tbp = gfc_find_typebound_proc (sym, &t, name, false, &gfc_current_locus); |
2208 | else | |
2209 | tbp = NULL; | |
2210 | ||
8e1f752a DK |
2211 | if (tbp) |
2212 | { | |
2213 | gfc_symbol* tbp_sym; | |
2214 | ||
524af0d6 | 2215 | if (!t) |
8e1f752a DK |
2216 | return MATCH_ERROR; |
2217 | ||
2218 | gcc_assert (!tail || !tail->next); | |
236e3815 JW |
2219 | |
2220 | if (!(primary->expr_type == EXPR_VARIABLE | |
2221 | || (primary->expr_type == EXPR_STRUCTURE | |
2222 | && primary->symtree && primary->symtree->n.sym | |
2223 | && primary->symtree->n.sym->attr.flavor))) | |
2224 | return MATCH_ERROR; | |
8e1f752a | 2225 | |
e34ccb4c | 2226 | if (tbp->n.tb->is_generic) |
e157f736 DK |
2227 | tbp_sym = NULL; |
2228 | else | |
e34ccb4c | 2229 | tbp_sym = tbp->n.tb->u.specific->n.sym; |
8e1f752a DK |
2230 | |
2231 | primary->expr_type = EXPR_COMPCALL; | |
e34ccb4c | 2232 | primary->value.compcall.tbp = tbp->n.tb; |
e157f736 | 2233 | primary->value.compcall.name = tbp->name; |
4a44a72d DK |
2234 | primary->value.compcall.ignore_pass = 0; |
2235 | primary->value.compcall.assign = 0; | |
2236 | primary->value.compcall.base_object = NULL; | |
e157f736 DK |
2237 | gcc_assert (primary->symtree->n.sym->attr.referenced); |
2238 | if (tbp_sym) | |
2239 | primary->ts = tbp_sym->ts; | |
049bb74e JW |
2240 | else |
2241 | gfc_clear_ts (&primary->ts); | |
e157f736 | 2242 | |
e34ccb4c | 2243 | m = gfc_match_actual_arglist (tbp->n.tb->subroutine, |
8e1f752a DK |
2244 | &primary->value.compcall.actual); |
2245 | if (m == MATCH_ERROR) | |
2246 | return MATCH_ERROR; | |
2247 | if (m == MATCH_NO) | |
2248 | { | |
2249 | if (sub_flag) | |
2250 | primary->value.compcall.actual = NULL; | |
2251 | else | |
2252 | { | |
2253 | gfc_error ("Expected argument list at %C"); | |
2254 | return MATCH_ERROR; | |
2255 | } | |
2256 | } | |
2257 | ||
8e1f752a DK |
2258 | break; |
2259 | } | |
2260 | ||
a5fbc2f3 PT |
2261 | if (!inquiry) |
2262 | component = gfc_find_component (sym, name, false, false, &tmp); | |
2263 | else | |
2264 | component = NULL; | |
2265 | ||
2266 | if (component == NULL && !inquiry) | |
6de9cd9a DN |
2267 | return MATCH_ERROR; |
2268 | ||
a5fbc2f3 PT |
2269 | /* Extend the reference chain determined by gfc_find_component or |
2270 | is_inquiry_ref. */ | |
f6288c24 | 2271 | if (primary->ref == NULL) |
a5fbc2f3 | 2272 | primary->ref = tmp; |
f6288c24 | 2273 | else |
a5fbc2f3 PT |
2274 | { |
2275 | /* Set by the for loop below for the last component ref. */ | |
2276 | gcc_assert (tail != NULL); | |
2277 | tail->next = tmp; | |
2278 | } | |
6de9cd9a | 2279 | |
f6288c24 | 2280 | /* The reference chain may be longer than one hop for union |
a5fbc2f3 | 2281 | subcomponents; find the new tail. */ |
f6288c24 | 2282 | for (tail = tmp; tail->next; tail = tail->next) |
a5fbc2f3 PT |
2283 | ; |
2284 | ||
2285 | if (tmp && tmp->type == REF_INQUIRY) | |
2286 | { | |
2287 | gfc_simplify_expr (primary, 0); | |
2288 | ||
2289 | if (primary->expr_type == EXPR_CONSTANT) | |
2290 | goto check_done; | |
2291 | ||
2292 | switch (tmp->u.i) | |
2293 | { | |
2294 | case INQUIRY_RE: | |
2295 | case INQUIRY_IM: | |
2296 | if (!gfc_notify_std (GFC_STD_F2008, "RE or IM part_ref at %C")) | |
2297 | return MATCH_ERROR; | |
2298 | ||
2299 | if (primary->ts.type != BT_COMPLEX) | |
2300 | { | |
2301 | gfc_error ("The RE or IM part_ref at %C must be " | |
2302 | "applied to a COMPLEX expression"); | |
2303 | return MATCH_ERROR; | |
2304 | } | |
2305 | primary->ts.type = BT_REAL; | |
2306 | break; | |
2307 | ||
2308 | case INQUIRY_LEN: | |
2309 | if (!gfc_notify_std (GFC_STD_F2003, "LEN part_ref at %C")) | |
2310 | return MATCH_ERROR; | |
2311 | ||
2312 | if (primary->ts.type != BT_CHARACTER) | |
2313 | { | |
2314 | gfc_error ("The LEN part_ref at %C must be applied " | |
2315 | "to a CHARACTER expression"); | |
2316 | return MATCH_ERROR; | |
2317 | } | |
2318 | primary->ts.u.cl = NULL; | |
2319 | primary->ts.type = BT_INTEGER; | |
2320 | primary->ts.kind = gfc_default_integer_kind; | |
2321 | break; | |
2322 | ||
2323 | case INQUIRY_KIND: | |
2324 | if (!gfc_notify_std (GFC_STD_F2003, "KIND part_ref at %C")) | |
2325 | return MATCH_ERROR; | |
2326 | ||
2327 | if (primary->ts.type == BT_CLASS | |
2328 | || primary->ts.type == BT_DERIVED) | |
2329 | { | |
2330 | gfc_error ("The KIND part_ref at %C must be applied " | |
2331 | "to an expression of intrinsic type"); | |
2332 | return MATCH_ERROR; | |
2333 | } | |
2334 | primary->ts.type = BT_INTEGER; | |
2335 | primary->ts.kind = gfc_default_integer_kind; | |
2336 | break; | |
2337 | ||
2338 | default: | |
2339 | gcc_unreachable (); | |
2340 | } | |
2341 | ||
2342 | goto check_done; | |
2343 | } | |
6de9cd9a DN |
2344 | |
2345 | primary->ts = component->ts; | |
2346 | ||
a4a76e52 | 2347 | if (component->attr.proc_pointer && ppc_arg) |
713485cc | 2348 | { |
837c4b78 | 2349 | /* Procedure pointer component call: Look for argument list. */ |
23878536 | 2350 | m = gfc_match_actual_arglist (sub_flag, |
713485cc JW |
2351 | &primary->value.compcall.actual); |
2352 | if (m == MATCH_ERROR) | |
2353 | return MATCH_ERROR; | |
837c4b78 JW |
2354 | |
2355 | if (m == MATCH_NO && !gfc_matching_ptr_assignment | |
a4a76e52 | 2356 | && !gfc_matching_procptr_assignment && !matching_actual_arglist) |
837c4b78 | 2357 | { |
a4d9b221 | 2358 | gfc_error ("Procedure pointer component %qs requires an " |
837c4b78 JW |
2359 | "argument list at %C", component->name); |
2360 | return MATCH_ERROR; | |
2361 | } | |
2362 | ||
23878536 JW |
2363 | if (m == MATCH_YES) |
2364 | primary->expr_type = EXPR_PPC; | |
713485cc JW |
2365 | |
2366 | break; | |
2367 | } | |
2368 | ||
c74b74a8 | 2369 | if (component->as != NULL && !component->attr.proc_pointer) |
6de9cd9a DN |
2370 | { |
2371 | tail = extend_ref (primary, tail); | |
2372 | tail->type = REF_ARRAY; | |
2373 | ||
d3a9eea2 TB |
2374 | m = gfc_match_array_ref (&tail->u.ar, component->as, equiv_flag, |
2375 | component->as->corank); | |
6de9cd9a DN |
2376 | if (m != MATCH_YES) |
2377 | return m; | |
2378 | } | |
156c0160 JW |
2379 | else if (component->ts.type == BT_CLASS && component->attr.class_ok |
2380 | && CLASS_DATA (component)->as && !component->attr.proc_pointer) | |
cf2b3c22 TB |
2381 | { |
2382 | tail = extend_ref (primary, tail); | |
2383 | tail->type = REF_ARRAY; | |
6de9cd9a | 2384 | |
7a08eda1 | 2385 | m = gfc_match_array_ref (&tail->u.ar, CLASS_DATA (component)->as, |
d3a9eea2 | 2386 | equiv_flag, |
7a08eda1 | 2387 | CLASS_DATA (component)->as->corank); |
cf2b3c22 TB |
2388 | if (m != MATCH_YES) |
2389 | return m; | |
2390 | } | |
2391 | ||
a5fbc2f3 PT |
2392 | check_done: |
2393 | /* In principle, we could have eg. expr%re%kind so we must allow for | |
2394 | this possibility. */ | |
2395 | if (gfc_match_char ('%') == MATCH_YES) | |
2396 | { | |
2397 | if (component && (component->ts.type == BT_DERIVED | |
2398 | || component->ts.type == BT_CLASS)) | |
2399 | sym = component->ts.u.derived; | |
2400 | continue; | |
2401 | } | |
2402 | else if (inquiry) | |
2403 | break; | |
2404 | ||
cf2b3c22 | 2405 | if ((component->ts.type != BT_DERIVED && component->ts.type != BT_CLASS) |
a5fbc2f3 | 2406 | || gfc_match_member_sep (component->ts.u.derived) != MATCH_YES) |
6de9cd9a DN |
2407 | break; |
2408 | ||
a5fbc2f3 PT |
2409 | if (component->ts.type == BT_DERIVED || component->ts.type == BT_CLASS) |
2410 | sym = component->ts.u.derived; | |
6de9cd9a DN |
2411 | } |
2412 | ||
2413 | check_substring: | |
f2d3cb25 | 2414 | unknown = false; |
f6288c24 | 2415 | if (primary->ts.type == BT_UNKNOWN && !gfc_fl_struct (sym->attr.flavor)) |
c040ffff | 2416 | { |
713485cc | 2417 | if (gfc_get_default_type (sym->name, sym->ns)->type == BT_CHARACTER) |
c040ffff | 2418 | { |
edf1eac2 SK |
2419 | gfc_set_default_type (sym, 0, sym->ns); |
2420 | primary->ts = sym->ts; | |
f2d3cb25 | 2421 | unknown = true; |
c040ffff TS |
2422 | } |
2423 | } | |
2424 | ||
6de9cd9a DN |
2425 | if (primary->ts.type == BT_CHARACTER) |
2426 | { | |
38217d3e PT |
2427 | bool def = primary->ts.deferred == 1; |
2428 | switch (match_substring (primary->ts.u.cl, equiv_flag, &substring, def)) | |
6de9cd9a DN |
2429 | { |
2430 | case MATCH_YES: | |
2431 | if (tail == NULL) | |
2432 | primary->ref = substring; | |
2433 | else | |
2434 | tail->next = substring; | |
2435 | ||
2436 | if (primary->expr_type == EXPR_CONSTANT) | |
2437 | primary->expr_type = EXPR_SUBSTRING; | |
2438 | ||
860c8f3b | 2439 | if (substring) |
bc21d315 | 2440 | primary->ts.u.cl = NULL; |
860c8f3b | 2441 | |
6de9cd9a DN |
2442 | break; |
2443 | ||
2444 | case MATCH_NO: | |
f2d3cb25 | 2445 | if (unknown) |
858f1fa2 DK |
2446 | { |
2447 | gfc_clear_ts (&primary->ts); | |
2448 | gfc_clear_ts (&sym->ts); | |
2449 | } | |
6de9cd9a DN |
2450 | break; |
2451 | ||
2452 | case MATCH_ERROR: | |
2453 | return MATCH_ERROR; | |
2454 | } | |
2455 | } | |
2456 | ||
4ceda204 JW |
2457 | /* F08:C611. */ |
2458 | if (primary->ts.type == BT_DERIVED && primary->ref | |
2459 | && primary->ts.u.derived && primary->ts.u.derived->attr.abstract) | |
2460 | { | |
2461 | gfc_error ("Nonpolymorphic reference to abstract type at %C"); | |
2462 | return MATCH_ERROR; | |
2463 | } | |
2464 | ||
2465 | /* F08:C727. */ | |
d3a9eea2 TB |
2466 | if (primary->expr_type == EXPR_PPC && gfc_is_coindexed (primary)) |
2467 | { | |
2468 | gfc_error ("Coindexed procedure-pointer component at %C"); | |
2469 | return MATCH_ERROR; | |
2470 | } | |
2471 | ||
6de9cd9a DN |
2472 | return MATCH_YES; |
2473 | } | |
2474 | ||
2475 | ||
2476 | /* Given an expression that is a variable, figure out what the | |
2477 | ultimate variable's type and attribute is, traversing the reference | |
2478 | structures if necessary. | |
2479 | ||
2480 | This subroutine is trickier than it looks. We start at the base | |
2481 | symbol and store the attribute. Component references load a | |
2482 | completely new attribute. | |
2483 | ||
2484 | A couple of rules come into play. Subobjects of targets are always | |
2485 | targets themselves. If we see a component that goes through a | |
2486 | pointer, then the expression must also be a target, since the | |
2487 | pointer is associated with something (if it isn't core will soon be | |
2488 | dumped). If we see a full part or section of an array, the | |
2489 | expression is also an array. | |
2490 | ||
f7b529fa | 2491 | We can have at most one full array reference. */ |
6de9cd9a DN |
2492 | |
2493 | symbol_attribute | |
edf1eac2 | 2494 | gfc_variable_attr (gfc_expr *expr, gfc_typespec *ts) |
6de9cd9a | 2495 | { |
16acb1a8 | 2496 | int dimension, codimension, pointer, allocatable, target; |
6de9cd9a DN |
2497 | symbol_attribute attr; |
2498 | gfc_ref *ref; | |
cf2b3c22 TB |
2499 | gfc_symbol *sym; |
2500 | gfc_component *comp; | |
a5fbc2f3 | 2501 | bool has_inquiry_part; |
6de9cd9a | 2502 | |
50dbf0b4 | 2503 | if (expr->expr_type != EXPR_VARIABLE && expr->expr_type != EXPR_FUNCTION) |
6de9cd9a DN |
2504 | gfc_internal_error ("gfc_variable_attr(): Expression isn't a variable"); |
2505 | ||
cf2b3c22 TB |
2506 | sym = expr->symtree->n.sym; |
2507 | attr = sym->attr; | |
6de9cd9a | 2508 | |
528622fd | 2509 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok) |
cf2b3c22 | 2510 | { |
7a08eda1 | 2511 | dimension = CLASS_DATA (sym)->attr.dimension; |
83ba23b7 | 2512 | codimension = CLASS_DATA (sym)->attr.codimension; |
d40477b4 | 2513 | pointer = CLASS_DATA (sym)->attr.class_pointer; |
7a08eda1 | 2514 | allocatable = CLASS_DATA (sym)->attr.allocatable; |
cf2b3c22 TB |
2515 | } |
2516 | else | |
2517 | { | |
2518 | dimension = attr.dimension; | |
83ba23b7 | 2519 | codimension = attr.codimension; |
cf2b3c22 TB |
2520 | pointer = attr.pointer; |
2521 | allocatable = attr.allocatable; | |
2522 | } | |
6de9cd9a DN |
2523 | |
2524 | target = attr.target; | |
713485cc | 2525 | if (pointer || attr.proc_pointer) |
6de9cd9a DN |
2526 | target = 1; |
2527 | ||
2528 | if (ts != NULL && expr->ts.type == BT_UNKNOWN) | |
cf2b3c22 | 2529 | *ts = sym->ts; |
6de9cd9a | 2530 | |
a5fbc2f3 PT |
2531 | has_inquiry_part = false; |
2532 | for (ref = expr->ref; ref; ref = ref->next) | |
2533 | if (ref->type == REF_INQUIRY) | |
2534 | { | |
2535 | has_inquiry_part = true; | |
2536 | break; | |
2537 | } | |
2538 | ||
8c91ab34 | 2539 | for (ref = expr->ref; ref; ref = ref->next) |
6de9cd9a DN |
2540 | switch (ref->type) |
2541 | { | |
2542 | case REF_ARRAY: | |
2543 | ||
2544 | switch (ref->u.ar.type) | |
2545 | { | |
2546 | case AR_FULL: | |
2547 | dimension = 1; | |
2548 | break; | |
2549 | ||
2550 | case AR_SECTION: | |
5046aff5 | 2551 | allocatable = pointer = 0; |
6de9cd9a DN |
2552 | dimension = 1; |
2553 | break; | |
2554 | ||
2555 | case AR_ELEMENT: | |
d3a9eea2 TB |
2556 | /* Handle coarrays. */ |
2557 | if (ref->u.ar.dimen > 0) | |
2558 | allocatable = pointer = 0; | |
6de9cd9a DN |
2559 | break; |
2560 | ||
2561 | case AR_UNKNOWN: | |
bf1b77dd PT |
2562 | /* If any of start, end or stride is not integer, there will |
2563 | already have been an error issued. */ | |
16acb1a8 DH |
2564 | int errors; |
2565 | gfc_get_errors (NULL, &errors); | |
2566 | if (errors == 0) | |
bf1b77dd | 2567 | gfc_internal_error ("gfc_variable_attr(): Bad array reference"); |
6de9cd9a DN |
2568 | } |
2569 | ||
2570 | break; | |
2571 | ||
2572 | case REF_COMPONENT: | |
cf2b3c22 TB |
2573 | comp = ref->u.c.component; |
2574 | attr = comp->attr; | |
a5fbc2f3 | 2575 | if (ts != NULL && !has_inquiry_part) |
e8a25349 | 2576 | { |
cf2b3c22 | 2577 | *ts = comp->ts; |
e8a25349 TS |
2578 | /* Don't set the string length if a substring reference |
2579 | follows. */ | |
2580 | if (ts->type == BT_CHARACTER | |
2581 | && ref->next && ref->next->type == REF_SUBSTRING) | |
bc21d315 | 2582 | ts->u.cl = NULL; |
e8a25349 | 2583 | } |
6de9cd9a | 2584 | |
cf2b3c22 TB |
2585 | if (comp->ts.type == BT_CLASS) |
2586 | { | |
83ba23b7 | 2587 | codimension = CLASS_DATA (comp)->attr.codimension; |
d40477b4 | 2588 | pointer = CLASS_DATA (comp)->attr.class_pointer; |
7a08eda1 | 2589 | allocatable = CLASS_DATA (comp)->attr.allocatable; |
cf2b3c22 TB |
2590 | } |
2591 | else | |
2592 | { | |
83ba23b7 | 2593 | codimension = comp->attr.codimension; |
cf2b3c22 TB |
2594 | pointer = comp->attr.pointer; |
2595 | allocatable = comp->attr.allocatable; | |
2596 | } | |
713485cc | 2597 | if (pointer || attr.proc_pointer) |
6de9cd9a DN |
2598 | target = 1; |
2599 | ||
2600 | break; | |
2601 | ||
a5fbc2f3 | 2602 | case REF_INQUIRY: |
6de9cd9a | 2603 | case REF_SUBSTRING: |
5046aff5 | 2604 | allocatable = pointer = 0; |
6de9cd9a DN |
2605 | break; |
2606 | } | |
2607 | ||
2608 | attr.dimension = dimension; | |
83ba23b7 | 2609 | attr.codimension = codimension; |
6de9cd9a | 2610 | attr.pointer = pointer; |
5046aff5 | 2611 | attr.allocatable = allocatable; |
6de9cd9a | 2612 | attr.target = target; |
80f95228 | 2613 | attr.save = sym->attr.save; |
6de9cd9a DN |
2614 | |
2615 | return attr; | |
2616 | } | |
2617 | ||
2618 | ||
2619 | /* Return the attribute from a general expression. */ | |
2620 | ||
2621 | symbol_attribute | |
edf1eac2 | 2622 | gfc_expr_attr (gfc_expr *e) |
6de9cd9a DN |
2623 | { |
2624 | symbol_attribute attr; | |
2625 | ||
2626 | switch (e->expr_type) | |
2627 | { | |
2628 | case EXPR_VARIABLE: | |
2629 | attr = gfc_variable_attr (e, NULL); | |
2630 | break; | |
2631 | ||
2632 | case EXPR_FUNCTION: | |
2633 | gfc_clear_attr (&attr); | |
2634 | ||
50c7654b | 2635 | if (e->value.function.esym && e->value.function.esym->result) |
cf2b3c22 TB |
2636 | { |
2637 | gfc_symbol *sym = e->value.function.esym->result; | |
2638 | attr = sym->attr; | |
2639 | if (sym->ts.type == BT_CLASS) | |
2640 | { | |
7a08eda1 | 2641 | attr.dimension = CLASS_DATA (sym)->attr.dimension; |
d40477b4 | 2642 | attr.pointer = CLASS_DATA (sym)->attr.class_pointer; |
7a08eda1 | 2643 | attr.allocatable = CLASS_DATA (sym)->attr.allocatable; |
cf2b3c22 TB |
2644 | } |
2645 | } | |
574284e9 AV |
2646 | else if (e->value.function.isym |
2647 | && e->value.function.isym->transformational | |
2648 | && e->ts.type == BT_CLASS) | |
2649 | attr = CLASS_DATA (e)->attr; | |
50dbf0b4 JW |
2650 | else |
2651 | attr = gfc_variable_attr (e, NULL); | |
6de9cd9a DN |
2652 | |
2653 | /* TODO: NULL() returns pointers. May have to take care of this | |
edf1eac2 | 2654 | here. */ |
6de9cd9a DN |
2655 | |
2656 | break; | |
2657 | ||
2658 | default: | |
3c9f5092 AV |
2659 | gfc_clear_attr (&attr); |
2660 | break; | |
2661 | } | |
2662 | ||
2663 | return attr; | |
2664 | } | |
2665 | ||
2666 | ||
2667 | /* Given an expression, figure out what the ultimate expression | |
2668 | attribute is. This routine is similar to gfc_variable_attr with | |
2669 | parts of gfc_expr_attr, but focuses more on the needs of | |
2670 | coarrays. For coarrays a codimension attribute is kind of | |
ba85c8c3 AV |
2671 | "infectious" being propagated once set and never cleared. |
2672 | The coarray_comp is only set, when the expression refs a coarray | |
2673 | component. REFS_COMP is set when present to true only, when this EXPR | |
2674 | refs a (non-_data) component. To check whether EXPR refs an allocatable | |
2675 | component in a derived type coarray *refs_comp needs to be set and | |
2676 | coarray_comp has to false. */ | |
3c9f5092 AV |
2677 | |
2678 | static symbol_attribute | |
ba85c8c3 | 2679 | caf_variable_attr (gfc_expr *expr, bool in_allocate, bool *refs_comp) |
3c9f5092 | 2680 | { |
de91486c | 2681 | int dimension, codimension, pointer, allocatable, target, coarray_comp; |
3c9f5092 AV |
2682 | symbol_attribute attr; |
2683 | gfc_ref *ref; | |
2684 | gfc_symbol *sym; | |
2685 | gfc_component *comp; | |
2686 | ||
2687 | if (expr->expr_type != EXPR_VARIABLE && expr->expr_type != EXPR_FUNCTION) | |
2688 | gfc_internal_error ("gfc_caf_attr(): Expression isn't a variable"); | |
2689 | ||
2690 | sym = expr->symtree->n.sym; | |
2691 | gfc_clear_attr (&attr); | |
2692 | ||
ba85c8c3 | 2693 | if (refs_comp) |
525a5e33 | 2694 | *refs_comp = false; |
ba85c8c3 | 2695 | |
3c9f5092 AV |
2696 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok) |
2697 | { | |
2698 | dimension = CLASS_DATA (sym)->attr.dimension; | |
2699 | codimension = CLASS_DATA (sym)->attr.codimension; | |
2700 | pointer = CLASS_DATA (sym)->attr.class_pointer; | |
2701 | allocatable = CLASS_DATA (sym)->attr.allocatable; | |
de91486c AV |
2702 | attr.alloc_comp = CLASS_DATA (sym)->ts.u.derived->attr.alloc_comp; |
2703 | attr.pointer_comp = CLASS_DATA (sym)->ts.u.derived->attr.pointer_comp; | |
3c9f5092 AV |
2704 | } |
2705 | else | |
2706 | { | |
2707 | dimension = sym->attr.dimension; | |
2708 | codimension = sym->attr.codimension; | |
2709 | pointer = sym->attr.pointer; | |
2710 | allocatable = sym->attr.allocatable; | |
de91486c | 2711 | attr.alloc_comp = sym->ts.type == BT_DERIVED |
3c9f5092 | 2712 | ? sym->ts.u.derived->attr.alloc_comp : 0; |
de91486c AV |
2713 | attr.pointer_comp = sym->ts.type == BT_DERIVED |
2714 | ? sym->ts.u.derived->attr.pointer_comp : 0; | |
3c9f5092 AV |
2715 | } |
2716 | ||
ba85c8c3 | 2717 | target = coarray_comp = 0; |
3c9f5092 AV |
2718 | if (pointer || attr.proc_pointer) |
2719 | target = 1; | |
2720 | ||
2721 | for (ref = expr->ref; ref; ref = ref->next) | |
2722 | switch (ref->type) | |
2723 | { | |
2724 | case REF_ARRAY: | |
2725 | ||
2726 | switch (ref->u.ar.type) | |
2727 | { | |
2728 | case AR_FULL: | |
2729 | case AR_SECTION: | |
2730 | dimension = 1; | |
2731 | break; | |
2732 | ||
2733 | case AR_ELEMENT: | |
2734 | /* Handle coarrays. */ | |
2735 | if (ref->u.ar.dimen > 0 && !in_allocate) | |
2736 | allocatable = pointer = 0; | |
2737 | break; | |
2738 | ||
2739 | case AR_UNKNOWN: | |
2740 | /* If any of start, end or stride is not integer, there will | |
2741 | already have been an error issued. */ | |
2742 | int errors; | |
2743 | gfc_get_errors (NULL, &errors); | |
2744 | if (errors == 0) | |
2745 | gfc_internal_error ("gfc_caf_attr(): Bad array reference"); | |
2746 | } | |
2747 | ||
2748 | break; | |
2749 | ||
2750 | case REF_COMPONENT: | |
2751 | comp = ref->u.c.component; | |
2752 | ||
2753 | if (comp->ts.type == BT_CLASS) | |
2754 | { | |
ba85c8c3 AV |
2755 | /* Set coarray_comp only, when this component introduces the |
2756 | coarray. */ | |
2757 | coarray_comp = !codimension && CLASS_DATA (comp)->attr.codimension; | |
3c9f5092 AV |
2758 | codimension |= CLASS_DATA (comp)->attr.codimension; |
2759 | pointer = CLASS_DATA (comp)->attr.class_pointer; | |
2760 | allocatable = CLASS_DATA (comp)->attr.allocatable; | |
3c9f5092 AV |
2761 | } |
2762 | else | |
2763 | { | |
ba85c8c3 AV |
2764 | /* Set coarray_comp only, when this component introduces the |
2765 | coarray. */ | |
2766 | coarray_comp = !codimension && comp->attr.codimension; | |
3c9f5092 AV |
2767 | codimension |= comp->attr.codimension; |
2768 | pointer = comp->attr.pointer; | |
2769 | allocatable = comp->attr.allocatable; | |
3c9f5092 AV |
2770 | } |
2771 | ||
525a5e33 AV |
2772 | if (refs_comp && strcmp (comp->name, "_data") != 0 |
2773 | && (ref->next == NULL | |
2774 | || (ref->next->type == REF_ARRAY && ref->next->next == NULL))) | |
2775 | *refs_comp = true; | |
ba85c8c3 | 2776 | |
3c9f5092 AV |
2777 | if (pointer || attr.proc_pointer) |
2778 | target = 1; | |
2779 | ||
2780 | break; | |
2781 | ||
2782 | case REF_SUBSTRING: | |
a5fbc2f3 | 2783 | case REF_INQUIRY: |
3c9f5092 AV |
2784 | allocatable = pointer = 0; |
2785 | break; | |
2786 | } | |
2787 | ||
2788 | attr.dimension = dimension; | |
2789 | attr.codimension = codimension; | |
2790 | attr.pointer = pointer; | |
2791 | attr.allocatable = allocatable; | |
2792 | attr.target = target; | |
2793 | attr.save = sym->attr.save; | |
2794 | attr.coarray_comp = coarray_comp; | |
3c9f5092 AV |
2795 | |
2796 | return attr; | |
2797 | } | |
2798 | ||
2799 | ||
2800 | symbol_attribute | |
ba85c8c3 | 2801 | gfc_caf_attr (gfc_expr *e, bool in_allocate, bool *refs_comp) |
3c9f5092 AV |
2802 | { |
2803 | symbol_attribute attr; | |
2804 | ||
2805 | switch (e->expr_type) | |
2806 | { | |
2807 | case EXPR_VARIABLE: | |
ba85c8c3 | 2808 | attr = caf_variable_attr (e, in_allocate, refs_comp); |
3c9f5092 AV |
2809 | break; |
2810 | ||
2811 | case EXPR_FUNCTION: | |
2812 | gfc_clear_attr (&attr); | |
2813 | ||
2814 | if (e->value.function.esym && e->value.function.esym->result) | |
2815 | { | |
2816 | gfc_symbol *sym = e->value.function.esym->result; | |
2817 | attr = sym->attr; | |
2818 | if (sym->ts.type == BT_CLASS) | |
2819 | { | |
2820 | attr.dimension = CLASS_DATA (sym)->attr.dimension; | |
2821 | attr.pointer = CLASS_DATA (sym)->attr.class_pointer; | |
2822 | attr.allocatable = CLASS_DATA (sym)->attr.allocatable; | |
2823 | attr.alloc_comp = CLASS_DATA (sym)->ts.u.derived->attr.alloc_comp; | |
de91486c AV |
2824 | attr.pointer_comp = CLASS_DATA (sym)->ts.u.derived |
2825 | ->attr.pointer_comp; | |
3c9f5092 AV |
2826 | } |
2827 | } | |
2828 | else if (e->symtree) | |
ba85c8c3 | 2829 | attr = caf_variable_attr (e, in_allocate, refs_comp); |
3c9f5092 AV |
2830 | else |
2831 | gfc_clear_attr (&attr); | |
2832 | break; | |
2833 | ||
2834 | default: | |
6de9cd9a DN |
2835 | gfc_clear_attr (&attr); |
2836 | break; | |
2837 | } | |
2838 | ||
2839 | return attr; | |
2840 | } | |
2841 | ||
2842 | ||
2843 | /* Match a structure constructor. The initial symbol has already been | |
2844 | seen. */ | |
2845 | ||
fa9290d3 DK |
2846 | typedef struct gfc_structure_ctor_component |
2847 | { | |
2848 | char* name; | |
2849 | gfc_expr* val; | |
2850 | locus where; | |
2851 | struct gfc_structure_ctor_component* next; | |
2852 | } | |
2853 | gfc_structure_ctor_component; | |
2854 | ||
ece3f663 | 2855 | #define gfc_get_structure_ctor_component() XCNEW (gfc_structure_ctor_component) |
fa9290d3 DK |
2856 | |
2857 | static void | |
2858 | gfc_free_structure_ctor_component (gfc_structure_ctor_component *comp) | |
2859 | { | |
cede9502 | 2860 | free (comp->name); |
fa9290d3 | 2861 | gfc_free_expr (comp->val); |
cede9502 | 2862 | free (comp); |
fa9290d3 DK |
2863 | } |
2864 | ||
7d1f1e61 PT |
2865 | |
2866 | /* Translate the component list into the actual constructor by sorting it in | |
2867 | the order required; this also checks along the way that each and every | |
2868 | component actually has an initializer and handles default initializers | |
2869 | for components without explicit value given. */ | |
524af0d6 | 2870 | static bool |
7d1f1e61 | 2871 | build_actual_constructor (gfc_structure_ctor_component **comp_head, |
b7e75771 | 2872 | gfc_constructor_base *ctor_head, gfc_symbol *sym) |
6de9cd9a | 2873 | { |
fa9290d3 | 2874 | gfc_structure_ctor_component *comp_iter; |
7d1f1e61 PT |
2875 | gfc_component *comp; |
2876 | ||
2877 | for (comp = sym->components; comp; comp = comp->next) | |
2878 | { | |
2879 | gfc_structure_ctor_component **next_ptr; | |
2880 | gfc_expr *value = NULL; | |
2881 | ||
2882 | /* Try to find the initializer for the current component by name. */ | |
2883 | next_ptr = comp_head; | |
2884 | for (comp_iter = *comp_head; comp_iter; comp_iter = comp_iter->next) | |
2885 | { | |
2886 | if (!strcmp (comp_iter->name, comp->name)) | |
2887 | break; | |
2888 | next_ptr = &comp_iter->next; | |
2889 | } | |
2890 | ||
2891 | /* If an extension, try building the parent derived type by building | |
2892 | a value expression for the parent derived type and calling self. */ | |
2893 | if (!comp_iter && comp == sym->components && sym->attr.extension) | |
2894 | { | |
b7e75771 JD |
2895 | value = gfc_get_structure_constructor_expr (comp->ts.type, |
2896 | comp->ts.kind, | |
2897 | &gfc_current_locus); | |
7d1f1e61 | 2898 | value->ts = comp->ts; |
7d1f1e61 | 2899 | |
bf1b77dd PT |
2900 | if (!build_actual_constructor (comp_head, |
2901 | &value->value.constructor, | |
524af0d6 | 2902 | comp->ts.u.derived)) |
7d1f1e61 PT |
2903 | { |
2904 | gfc_free_expr (value); | |
524af0d6 | 2905 | return false; |
7d1f1e61 | 2906 | } |
b7e75771 JD |
2907 | |
2908 | gfc_constructor_append_expr (ctor_head, value, NULL); | |
7d1f1e61 PT |
2909 | continue; |
2910 | } | |
2911 | ||
2912 | /* If it was not found, try the default initializer if there's any; | |
2b3dc0db | 2913 | otherwise, it's an error unless this is a deferred parameter. */ |
7d1f1e61 PT |
2914 | if (!comp_iter) |
2915 | { | |
2916 | if (comp->initializer) | |
2917 | { | |
524af0d6 JB |
2918 | if (!gfc_notify_std (GFC_STD_F2003, "Structure constructor " |
2919 | "with missing optional arguments at %C")) | |
2920 | return false; | |
7d1f1e61 PT |
2921 | value = gfc_copy_expr (comp->initializer); |
2922 | } | |
9b548517 AV |
2923 | else if (comp->attr.allocatable |
2924 | || (comp->ts.type == BT_CLASS | |
2925 | && CLASS_DATA (comp)->attr.allocatable)) | |
7430df97 JW |
2926 | { |
2927 | if (!gfc_notify_std (GFC_STD_F2008, "No initializer for " | |
2f029c08 | 2928 | "allocatable component %qs given in the " |
9b548517 | 2929 | "structure constructor at %C", comp->name)) |
7430df97 JW |
2930 | return false; |
2931 | } | |
9b548517 | 2932 | else if (!comp->attr.artificial) |
7d1f1e61 | 2933 | { |
a4d9b221 | 2934 | gfc_error ("No initializer for component %qs given in the" |
546c8974 | 2935 | " structure constructor at %C", comp->name); |
524af0d6 | 2936 | return false; |
7d1f1e61 PT |
2937 | } |
2938 | } | |
2939 | else | |
2940 | value = comp_iter->val; | |
2941 | ||
2942 | /* Add the value to the constructor chain built. */ | |
b7e75771 | 2943 | gfc_constructor_append_expr (ctor_head, value, NULL); |
7d1f1e61 PT |
2944 | |
2945 | /* Remove the entry from the component list. We don't want the expression | |
2946 | value to be free'd, so set it to NULL. */ | |
2947 | if (comp_iter) | |
2948 | { | |
2949 | *next_ptr = comp_iter->next; | |
2950 | comp_iter->val = NULL; | |
2951 | gfc_free_structure_ctor_component (comp_iter); | |
2952 | } | |
2953 | } | |
524af0d6 | 2954 | return true; |
7d1f1e61 PT |
2955 | } |
2956 | ||
c3f34952 | 2957 | |
524af0d6 | 2958 | bool |
c3f34952 TB |
2959 | gfc_convert_to_structure_constructor (gfc_expr *e, gfc_symbol *sym, gfc_expr **cexpr, |
2960 | gfc_actual_arglist **arglist, | |
2961 | bool parent) | |
7d1f1e61 | 2962 | { |
c3f34952 | 2963 | gfc_actual_arglist *actual; |
7d1f1e61 | 2964 | gfc_structure_ctor_component *comp_tail, *comp_head, *comp_iter; |
b7e75771 | 2965 | gfc_constructor_base ctor_head = NULL; |
fa9290d3 | 2966 | gfc_component *comp; /* Is set NULL when named component is first seen */ |
fa9290d3 | 2967 | const char* last_name = NULL; |
c3f34952 TB |
2968 | locus old_locus; |
2969 | gfc_expr *expr; | |
6de9cd9a | 2970 | |
c3f34952 TB |
2971 | expr = parent ? *cexpr : e; |
2972 | old_locus = gfc_current_locus; | |
2973 | if (parent) | |
2974 | ; /* gfc_current_locus = *arglist->expr ? ->where;*/ | |
2975 | else | |
2976 | gfc_current_locus = expr->where; | |
6de9cd9a | 2977 | |
c3f34952 | 2978 | comp_tail = comp_head = NULL; |
6de9cd9a | 2979 | |
52f49934 DK |
2980 | if (!parent && sym->attr.abstract) |
2981 | { | |
a4d9b221 | 2982 | gfc_error ("Can't construct ABSTRACT type %qs at %L", |
c3f34952 TB |
2983 | sym->name, &expr->where); |
2984 | goto cleanup; | |
52f49934 DK |
2985 | } |
2986 | ||
c3f34952 TB |
2987 | comp = sym->components; |
2988 | actual = parent ? *arglist : expr->value.function.actual; | |
2989 | for ( ; actual; ) | |
6de9cd9a | 2990 | { |
c3f34952 | 2991 | gfc_component *this_comp = NULL; |
6de9cd9a | 2992 | |
c3f34952 TB |
2993 | if (!comp_head) |
2994 | comp_tail = comp_head = gfc_get_structure_ctor_component (); | |
2995 | else | |
2996 | { | |
2997 | comp_tail->next = gfc_get_structure_ctor_component (); | |
2998 | comp_tail = comp_tail->next; | |
2999 | } | |
3000 | if (actual->name) | |
3001 | { | |
524af0d6 JB |
3002 | if (!gfc_notify_std (GFC_STD_F2003, "Structure" |
3003 | " constructor with named arguments at %C")) | |
c3f34952 | 3004 | goto cleanup; |
6de9cd9a | 3005 | |
c3f34952 TB |
3006 | comp_tail->name = xstrdup (actual->name); |
3007 | last_name = comp_tail->name; | |
3008 | comp = NULL; | |
3009 | } | |
3010 | else | |
3011 | { | |
3012 | /* Components without name are not allowed after the first named | |
3013 | component initializer! */ | |
9b548517 | 3014 | if (!comp || comp->attr.artificial) |
fa9290d3 | 3015 | { |
c3f34952 TB |
3016 | if (last_name) |
3017 | gfc_error ("Component initializer without name after component" | |
546c8974 | 3018 | " named %s at %L", last_name, |
c3f34952 TB |
3019 | actual->expr ? &actual->expr->where |
3020 | : &gfc_current_locus); | |
3021 | else | |
3022 | gfc_error ("Too many components in structure constructor at " | |
546c8974 DM |
3023 | "%L", actual->expr ? &actual->expr->where |
3024 | : &gfc_current_locus); | |
c3f34952 | 3025 | goto cleanup; |
fa9290d3 | 3026 | } |
fa9290d3 | 3027 | |
c3f34952 TB |
3028 | comp_tail->name = xstrdup (comp->name); |
3029 | } | |
fa9290d3 | 3030 | |
c3f34952 | 3031 | /* Find the current component in the structure definition and check |
9d1210f4 | 3032 | its access is not private. */ |
c3f34952 | 3033 | if (comp) |
f6288c24 | 3034 | this_comp = gfc_find_component (sym, comp->name, false, false, NULL); |
c3f34952 TB |
3035 | else |
3036 | { | |
3037 | this_comp = gfc_find_component (sym, (const char *)comp_tail->name, | |
f6288c24 | 3038 | false, false, NULL); |
c3f34952 TB |
3039 | comp = NULL; /* Reset needed! */ |
3040 | } | |
6de9cd9a | 3041 | |
c3f34952 TB |
3042 | /* Here we can check if a component name is given which does not |
3043 | correspond to any component of the defined structure. */ | |
3044 | if (!this_comp) | |
3045 | goto cleanup; | |
fa9290d3 | 3046 | |
04946c6b TK |
3047 | /* For a constant string constructor, make sure the length is |
3048 | correct; truncate of fill with blanks if needed. */ | |
3049 | if (this_comp->ts.type == BT_CHARACTER && !this_comp->attr.allocatable | |
3050 | && this_comp->ts.u.cl && this_comp->ts.u.cl->length | |
3051 | && this_comp->ts.u.cl->length->expr_type == EXPR_CONSTANT | |
13a7688f | 3052 | && actual->expr->ts.type == BT_CHARACTER |
04946c6b TK |
3053 | && actual->expr->expr_type == EXPR_CONSTANT) |
3054 | { | |
3055 | ptrdiff_t c, e; | |
3056 | c = gfc_mpz_get_hwi (this_comp->ts.u.cl->length->value.integer); | |
3057 | e = actual->expr->value.character.length; | |
3058 | ||
3059 | if (c != e) | |
3060 | { | |
3061 | ptrdiff_t i, to; | |
3062 | gfc_char_t *dest; | |
3063 | dest = gfc_get_wide_string (c + 1); | |
3064 | ||
3065 | to = e < c ? e : c; | |
3066 | for (i = 0; i < to; i++) | |
3067 | dest[i] = actual->expr->value.character.string[i]; | |
a5fbc2f3 | 3068 | |
04946c6b TK |
3069 | for (i = e; i < c; i++) |
3070 | dest[i] = ' '; | |
3071 | ||
3072 | dest[c] = '\0'; | |
3073 | free (actual->expr->value.character.string); | |
3074 | ||
3075 | actual->expr->value.character.length = c; | |
3076 | actual->expr->value.character.string = dest; | |
cf015ca2 TK |
3077 | |
3078 | if (warn_line_truncation && c < e) | |
3079 | gfc_warning_now (OPT_Wcharacter_truncation, | |
3080 | "CHARACTER expression will be truncated " | |
3081 | "in constructor (%ld/%ld) at %L", (long int) c, | |
3082 | (long int) e, &actual->expr->where); | |
04946c6b TK |
3083 | } |
3084 | } | |
3085 | ||
c3f34952 TB |
3086 | comp_tail->val = actual->expr; |
3087 | if (actual->expr != NULL) | |
3088 | comp_tail->where = actual->expr->where; | |
3089 | actual->expr = NULL; | |
fa9290d3 | 3090 | |
c3f34952 | 3091 | /* Check if this component is already given a value. */ |
bf1b77dd | 3092 | for (comp_iter = comp_head; comp_iter != comp_tail; |
c3f34952 TB |
3093 | comp_iter = comp_iter->next) |
3094 | { | |
3095 | gcc_assert (comp_iter); | |
3096 | if (!strcmp (comp_iter->name, comp_tail->name)) | |
d3a9eea2 | 3097 | { |
c4100eae | 3098 | gfc_error ("Component %qs is initialized twice in the structure" |
546c8974 | 3099 | " constructor at %L", comp_tail->name, |
c3f34952 TB |
3100 | comp_tail->val ? &comp_tail->where |
3101 | : &gfc_current_locus); | |
d3a9eea2 | 3102 | goto cleanup; |
c3f34952 TB |
3103 | } |
3104 | } | |
d3a9eea2 | 3105 | |
c3f34952 TB |
3106 | /* F2008, R457/C725, for PURE C1283. */ |
3107 | if (this_comp->attr.pointer && comp_tail->val | |
3108 | && gfc_is_coindexed (comp_tail->val)) | |
3109 | { | |
a4d9b221 | 3110 | gfc_error ("Coindexed expression to pointer component %qs in " |
546c8974 | 3111 | "structure constructor at %L", comp_tail->name, |
c3f34952 TB |
3112 | &comp_tail->where); |
3113 | goto cleanup; | |
3114 | } | |
d3a9eea2 | 3115 | |
c3f34952 TB |
3116 | /* If not explicitly a parent constructor, gather up the components |
3117 | and build one. */ | |
3118 | if (comp && comp == sym->components | |
3119 | && sym->attr.extension | |
3120 | && comp_tail->val | |
f6288c24 | 3121 | && (!gfc_bt_struct (comp_tail->val->ts.type) |
c3f34952 TB |
3122 | || |
3123 | comp_tail->val->ts.u.derived != this_comp->ts.u.derived)) | |
3124 | { | |
524af0d6 | 3125 | bool m; |
c3f34952 | 3126 | gfc_actual_arglist *arg_null = NULL; |
6de9cd9a | 3127 | |
c3f34952 TB |
3128 | actual->expr = comp_tail->val; |
3129 | comp_tail->val = NULL; | |
6de9cd9a | 3130 | |
c3f34952 TB |
3131 | m = gfc_convert_to_structure_constructor (NULL, |
3132 | comp->ts.u.derived, &comp_tail->val, | |
3133 | comp->ts.u.derived->attr.zero_comp | |
3134 | ? &arg_null : &actual, true); | |
524af0d6 | 3135 | if (!m) |
c3f34952 | 3136 | goto cleanup; |
2eae3dc7 | 3137 | |
c3f34952 TB |
3138 | if (comp->ts.u.derived->attr.zero_comp) |
3139 | { | |
3140 | comp = comp->next; | |
3141 | continue; | |
3142 | } | |
3143 | } | |
fa9290d3 | 3144 | |
c3f34952 TB |
3145 | if (comp) |
3146 | comp = comp->next; | |
3147 | if (parent && !comp) | |
3148 | break; | |
fa9290d3 | 3149 | |
792f7301 MM |
3150 | if (actual) |
3151 | actual = actual->next; | |
6de9cd9a DN |
3152 | } |
3153 | ||
524af0d6 | 3154 | if (!build_actual_constructor (&comp_head, &ctor_head, sym)) |
7d1f1e61 PT |
3155 | goto cleanup; |
3156 | ||
fa9290d3 DK |
3157 | /* No component should be left, as this should have caused an error in the |
3158 | loop constructing the component-list (name that does not correspond to any | |
3159 | component in the structure definition). */ | |
c3f34952 | 3160 | if (comp_head && sym->attr.extension) |
7d1f1e61 PT |
3161 | { |
3162 | for (comp_iter = comp_head; comp_iter; comp_iter = comp_iter->next) | |
3163 | { | |
a4d9b221 | 3164 | gfc_error ("component %qs at %L has already been set by a " |
7d1f1e61 PT |
3165 | "parent derived type constructor", comp_iter->name, |
3166 | &comp_iter->where); | |
3167 | } | |
3168 | goto cleanup; | |
3169 | } | |
c3f34952 TB |
3170 | else |
3171 | gcc_assert (!comp_head); | |
fa9290d3 | 3172 | |
c3f34952 TB |
3173 | if (parent) |
3174 | { | |
3175 | expr = gfc_get_structure_constructor_expr (BT_DERIVED, 0, &gfc_current_locus); | |
3176 | expr->ts.u.derived = sym; | |
3177 | expr->value.constructor = ctor_head; | |
3178 | *cexpr = expr; | |
3179 | } | |
3180 | else | |
3181 | { | |
3182 | expr->ts.u.derived = sym; | |
3183 | expr->ts.kind = 0; | |
3184 | expr->ts.type = BT_DERIVED; | |
3185 | expr->value.constructor = ctor_head; | |
3186 | expr->expr_type = EXPR_STRUCTURE; | |
3187 | } | |
6de9cd9a | 3188 | |
bf1b77dd | 3189 | gfc_current_locus = old_locus; |
c3f34952 TB |
3190 | if (parent) |
3191 | *arglist = actual; | |
524af0d6 | 3192 | return true; |
6de9cd9a | 3193 | |
c3f34952 | 3194 | cleanup: |
bf1b77dd | 3195 | gfc_current_locus = old_locus; |
6de9cd9a | 3196 | |
fa9290d3 DK |
3197 | for (comp_iter = comp_head; comp_iter; ) |
3198 | { | |
3199 | gfc_structure_ctor_component *next = comp_iter->next; | |
3200 | gfc_free_structure_ctor_component (comp_iter); | |
3201 | comp_iter = next; | |
3202 | } | |
b7e75771 | 3203 | gfc_constructor_free (ctor_head); |
c3f34952 | 3204 | |
524af0d6 | 3205 | return false; |
c3f34952 TB |
3206 | } |
3207 | ||
3208 | ||
3209 | match | |
3210 | gfc_match_structure_constructor (gfc_symbol *sym, gfc_expr **result) | |
3211 | { | |
3212 | match m; | |
3213 | gfc_expr *e; | |
3214 | gfc_symtree *symtree; | |
3215 | ||
b64c3d06 | 3216 | gfc_get_ha_sym_tree (sym->name, &symtree); |
c3f34952 TB |
3217 | |
3218 | e = gfc_get_expr (); | |
3219 | e->symtree = symtree; | |
3220 | e->expr_type = EXPR_FUNCTION; | |
2f00fb3d | 3221 | e->where = gfc_current_locus; |
c3f34952 | 3222 | |
f6288c24 | 3223 | gcc_assert (gfc_fl_struct (sym->attr.flavor) |
c3f34952 TB |
3224 | && symtree->n.sym->attr.flavor == FL_PROCEDURE); |
3225 | e->value.function.esym = sym; | |
3226 | e->symtree->n.sym->attr.generic = 1; | |
3227 | ||
49032565 SK |
3228 | m = gfc_match_actual_arglist (0, &e->value.function.actual); |
3229 | if (m != MATCH_YES) | |
3230 | { | |
3231 | gfc_free_expr (e); | |
3232 | return m; | |
3233 | } | |
3234 | ||
3235 | if (!gfc_convert_to_structure_constructor (e, sym, NULL, NULL, false)) | |
3236 | { | |
3237 | gfc_free_expr (e); | |
3238 | return MATCH_ERROR; | |
3239 | } | |
3240 | ||
586dc38b SK |
3241 | /* If a structure constructor is in a DATA statement, then each entity |
3242 | in the structure constructor must be a constant. Try to reduce the | |
3243 | expression here. */ | |
3244 | if (gfc_in_match_data ()) | |
3245 | gfc_reduce_init_expr (e); | |
5bab4c96 | 3246 | |
49032565 SK |
3247 | *result = e; |
3248 | return MATCH_YES; | |
6de9cd9a DN |
3249 | } |
3250 | ||
3251 | ||
9a3db5a3 PT |
3252 | /* If the symbol is an implicit do loop index and implicitly typed, |
3253 | it should not be host associated. Provide a symtree from the | |
3254 | current namespace. */ | |
3255 | static match | |
3256 | check_for_implicit_index (gfc_symtree **st, gfc_symbol **sym) | |
3257 | { | |
3258 | if ((*sym)->attr.flavor == FL_VARIABLE | |
3259 | && (*sym)->ns != gfc_current_ns | |
3260 | && (*sym)->attr.implied_index | |
3261 | && (*sym)->attr.implicit_type | |
3262 | && !(*sym)->attr.use_assoc) | |
3263 | { | |
3264 | int i; | |
08a6b8e0 | 3265 | i = gfc_get_sym_tree ((*sym)->name, NULL, st, false); |
9a3db5a3 PT |
3266 | if (i) |
3267 | return MATCH_ERROR; | |
3268 | *sym = (*st)->n.sym; | |
3269 | } | |
3270 | return MATCH_YES; | |
3271 | } | |
3272 | ||
3273 | ||
3070bab4 JW |
3274 | /* Procedure pointer as function result: Replace the function symbol by the |
3275 | auto-generated hidden result variable named "ppr@". */ | |
3276 | ||
524af0d6 | 3277 | static bool |
3070bab4 JW |
3278 | replace_hidden_procptr_result (gfc_symbol **sym, gfc_symtree **st) |
3279 | { | |
3280 | /* Check for procedure pointer result variable. */ | |
3281 | if ((*sym)->attr.function && !(*sym)->attr.external | |
3282 | && (*sym)->result && (*sym)->result != *sym | |
3283 | && (*sym)->result->attr.proc_pointer | |
3284 | && (*sym) == gfc_current_ns->proc_name | |
3285 | && (*sym) == (*sym)->result->ns->proc_name | |
3286 | && strcmp ("ppr@", (*sym)->result->name) == 0) | |
3287 | { | |
3288 | /* Automatic replacement with "hidden" result variable. */ | |
3289 | (*sym)->result->attr.referenced = (*sym)->attr.referenced; | |
3290 | *sym = (*sym)->result; | |
3291 | *st = gfc_find_symtree ((*sym)->ns->sym_root, (*sym)->name); | |
524af0d6 | 3292 | return true; |
3070bab4 | 3293 | } |
524af0d6 | 3294 | return false; |
3070bab4 JW |
3295 | } |
3296 | ||
3297 | ||
6de9cd9a DN |
3298 | /* Matches a variable name followed by anything that might follow it-- |
3299 | array reference, argument list of a function, etc. */ | |
3300 | ||
3301 | match | |
edf1eac2 | 3302 | gfc_match_rvalue (gfc_expr **result) |
6de9cd9a DN |
3303 | { |
3304 | gfc_actual_arglist *actual_arglist; | |
d3fcc995 | 3305 | char name[GFC_MAX_SYMBOL_LEN + 1], argname[GFC_MAX_SYMBOL_LEN + 1]; |
6de9cd9a DN |
3306 | gfc_state_data *st; |
3307 | gfc_symbol *sym; | |
3308 | gfc_symtree *symtree; | |
d3fcc995 | 3309 | locus where, old_loc; |
6de9cd9a | 3310 | gfc_expr *e; |
d3fcc995 | 3311 | match m, m2; |
6de9cd9a | 3312 | int i; |
5270c302 AL |
3313 | gfc_typespec *ts; |
3314 | bool implicit_char; | |
a99288e5 | 3315 | gfc_ref *ref; |
6de9cd9a | 3316 | |
cd714e1e FR |
3317 | m = gfc_match ("%%loc"); |
3318 | if (m == MATCH_YES) | |
3319 | { | |
3320 | if (!gfc_notify_std (GFC_STD_LEGACY, "%%LOC() as an rvalue at %C")) | |
3321 | return MATCH_ERROR; | |
3322 | strncpy (name, "loc", 4); | |
3323 | } | |
3324 | ||
3325 | else | |
3326 | { | |
3327 | m = gfc_match_name (name); | |
3328 | if (m != MATCH_YES) | |
3329 | return m; | |
3330 | } | |
6de9cd9a | 3331 | |
f6288c24 FR |
3332 | /* Check if the symbol exists. */ |
3333 | if (gfc_find_sym_tree (name, NULL, 1, &symtree)) | |
6de9cd9a DN |
3334 | return MATCH_ERROR; |
3335 | ||
f6288c24 FR |
3336 | /* If the symbol doesn't exist, create it unless the name matches a FL_STRUCT |
3337 | type. For derived types we create a generic symbol which links to the | |
3338 | derived type symbol; STRUCTUREs are simpler and must not conflict with | |
3339 | variables. */ | |
3340 | if (!symtree) | |
3341 | if (gfc_find_sym_tree (gfc_dt_upper_string (name), NULL, 1, &symtree)) | |
3342 | return MATCH_ERROR; | |
3343 | if (!symtree || symtree->n.sym->attr.flavor != FL_STRUCT) | |
3344 | { | |
3345 | if (gfc_find_state (COMP_INTERFACE) | |
3346 | && !gfc_current_ns->has_import_set) | |
3347 | i = gfc_get_sym_tree (name, NULL, &symtree, false); | |
3348 | else | |
3349 | i = gfc_get_ha_sym_tree (name, &symtree); | |
3350 | if (i) | |
3351 | return MATCH_ERROR; | |
3352 | } | |
3353 | ||
3354 | ||
6de9cd9a DN |
3355 | sym = symtree->n.sym; |
3356 | e = NULL; | |
63645982 | 3357 | where = gfc_current_locus; |
6de9cd9a | 3358 | |
3070bab4 JW |
3359 | replace_hidden_procptr_result (&sym, &symtree); |
3360 | ||
9a3db5a3 PT |
3361 | /* If this is an implicit do loop index and implicitly typed, |
3362 | it should not be host associated. */ | |
3363 | m = check_for_implicit_index (&symtree, &sym); | |
3364 | if (m != MATCH_YES) | |
3365 | return m; | |
3366 | ||
6de9cd9a | 3367 | gfc_set_sym_referenced (sym); |
9a3db5a3 | 3368 | sym->attr.implied_index = 0; |
6de9cd9a | 3369 | |
0921bc44 JJ |
3370 | if (sym->attr.function && sym->result == sym) |
3371 | { | |
811849c0 PT |
3372 | /* See if this is a directly recursive function call. */ |
3373 | gfc_gobble_whitespace (); | |
3374 | if (sym->attr.recursive | |
8fc541d3 | 3375 | && gfc_peek_ascii_char () == '(' |
fc2d8680 PT |
3376 | && gfc_current_ns->proc_name == sym |
3377 | && !sym->attr.dimension) | |
811849c0 | 3378 | { |
a4d9b221 | 3379 | gfc_error ("%qs at %C is the name of a recursive function " |
fc2d8680 PT |
3380 | "and so refers to the result variable. Use an " |
3381 | "explicit RESULT variable for direct recursion " | |
3382 | "(12.5.2.1)", sym->name); | |
811849c0 PT |
3383 | return MATCH_ERROR; |
3384 | } | |
fc2d8680 | 3385 | |
2d71b918 | 3386 | if (gfc_is_function_return_value (sym, gfc_current_ns)) |
0921bc44 JJ |
3387 | goto variable; |
3388 | ||
3389 | if (sym->attr.entry | |
3390 | && (sym->ns == gfc_current_ns | |
3391 | || sym->ns == gfc_current_ns->parent)) | |
3392 | { | |
3393 | gfc_entry_list *el = NULL; | |
bf1b77dd | 3394 | |
0921bc44 JJ |
3395 | for (el = sym->ns->entries; el; el = el->next) |
3396 | if (sym == el->sym) | |
3397 | goto variable; | |
3398 | } | |
3399 | } | |
6de9cd9a | 3400 | |
8fb74da4 JW |
3401 | if (gfc_matching_procptr_assignment) |
3402 | goto procptr0; | |
3403 | ||
6de9cd9a DN |
3404 | if (sym->attr.function || sym->attr.external || sym->attr.intrinsic) |
3405 | goto function0; | |
3406 | ||
3407 | if (sym->attr.generic) | |
3408 | goto generic_function; | |
3409 | ||
3410 | switch (sym->attr.flavor) | |
3411 | { | |
3412 | case FL_VARIABLE: | |
3413 | variable: | |
6de9cd9a DN |
3414 | e = gfc_get_expr (); |
3415 | ||
3416 | e->expr_type = EXPR_VARIABLE; | |
3417 | e->symtree = symtree; | |
3418 | ||
713485cc | 3419 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3420 | break; |
3421 | ||
3422 | case FL_PARAMETER: | |
b7263e8f | 3423 | /* A statement of the form "REAL, parameter :: a(0:10) = 1" will |
bf1b77dd | 3424 | end up here. Unfortunately, sym->value->expr_type is set to |
b7263e8f EE |
3425 | EXPR_CONSTANT, and so the if () branch would be followed without |
3426 | the !sym->as check. */ | |
3427 | if (sym->value && sym->value->expr_type != EXPR_ARRAY && !sym->as) | |
6de9cd9a DN |
3428 | e = gfc_copy_expr (sym->value); |
3429 | else | |
3430 | { | |
3431 | e = gfc_get_expr (); | |
3432 | e->expr_type = EXPR_VARIABLE; | |
3433 | } | |
3434 | ||
3435 | e->symtree = symtree; | |
713485cc | 3436 | m = gfc_match_varspec (e, 0, false, true); |
a99288e5 PT |
3437 | |
3438 | if (sym->ts.is_c_interop || sym->ts.is_iso_c) | |
3439 | break; | |
3440 | ||
927171bf PT |
3441 | /* Variable array references to derived type parameters cause |
3442 | all sorts of headaches in simplification. Treating such | |
3443 | expressions as variable works just fine for all array | |
3444 | references. */ | |
3445 | if (sym->value && sym->ts.type == BT_DERIVED && e->ref) | |
a99288e5 PT |
3446 | { |
3447 | for (ref = e->ref; ref; ref = ref->next) | |
3448 | if (ref->type == REF_ARRAY) | |
3449 | break; | |
3450 | ||
927171bf | 3451 | if (ref == NULL || ref->u.ar.type == AR_FULL) |
a99288e5 PT |
3452 | break; |
3453 | ||
3454 | ref = e->ref; | |
3455 | e->ref = NULL; | |
3456 | gfc_free_expr (e); | |
3457 | e = gfc_get_expr (); | |
3458 | e->expr_type = EXPR_VARIABLE; | |
3459 | e->symtree = symtree; | |
3460 | e->ref = ref; | |
a99288e5 PT |
3461 | } |
3462 | ||
6de9cd9a DN |
3463 | break; |
3464 | ||
f6288c24 | 3465 | case FL_STRUCT: |
6de9cd9a DN |
3466 | case FL_DERIVED: |
3467 | sym = gfc_use_derived (sym); | |
3468 | if (sym == NULL) | |
3469 | m = MATCH_ERROR; | |
3470 | else | |
c3f34952 | 3471 | goto generic_function; |
6de9cd9a DN |
3472 | break; |
3473 | ||
3474 | /* If we're here, then the name is known to be the name of a | |
3475 | procedure, yet it is not sure to be the name of a function. */ | |
3476 | case FL_PROCEDURE: | |
8fb74da4 | 3477 | |
1cc0e193 | 3478 | /* Procedure Pointer Assignments. */ |
8fb74da4 JW |
3479 | procptr0: |
3480 | if (gfc_matching_procptr_assignment) | |
3481 | { | |
3482 | gfc_gobble_whitespace (); | |
e35bbb23 | 3483 | if (!sym->attr.dimension && gfc_peek_ascii_char () == '(') |
8fb74da4 JW |
3484 | /* Parse functions returning a procptr. */ |
3485 | goto function0; | |
3486 | ||
8fb74da4 JW |
3487 | e = gfc_get_expr (); |
3488 | e->expr_type = EXPR_VARIABLE; | |
3489 | e->symtree = symtree; | |
713485cc | 3490 | m = gfc_match_varspec (e, 0, false, true); |
2dda89a8 JW |
3491 | if (!e->ref && sym->attr.flavor == FL_UNKNOWN |
3492 | && sym->ts.type == BT_UNKNOWN | |
524af0d6 | 3493 | && !gfc_add_flavor (&sym->attr, FL_PROCEDURE, sym->name, NULL)) |
2dda89a8 JW |
3494 | { |
3495 | m = MATCH_ERROR; | |
3496 | break; | |
3497 | } | |
8fb74da4 JW |
3498 | break; |
3499 | } | |
3500 | ||
6de9cd9a DN |
3501 | if (sym->attr.subroutine) |
3502 | { | |
a4d9b221 | 3503 | gfc_error ("Unexpected use of subroutine name %qs at %C", |
6de9cd9a DN |
3504 | sym->name); |
3505 | m = MATCH_ERROR; | |
3506 | break; | |
3507 | } | |
3508 | ||
3509 | /* At this point, the name has to be a non-statement function. | |
edf1eac2 SK |
3510 | If the name is the same as the current function being |
3511 | compiled, then we have a variable reference (to the function | |
3512 | result) if the name is non-recursive. */ | |
6de9cd9a DN |
3513 | |
3514 | st = gfc_enclosing_unit (NULL); | |
3515 | ||
4668d6f9 PT |
3516 | if (st != NULL |
3517 | && st->state == COMP_FUNCTION | |
6de9cd9a DN |
3518 | && st->sym == sym |
3519 | && !sym->attr.recursive) | |
3520 | { | |
3521 | e = gfc_get_expr (); | |
3522 | e->symtree = symtree; | |
3523 | e->expr_type = EXPR_VARIABLE; | |
3524 | ||
713485cc | 3525 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3526 | break; |
3527 | } | |
3528 | ||
3529 | /* Match a function reference. */ | |
3530 | function0: | |
3531 | m = gfc_match_actual_arglist (0, &actual_arglist); | |
3532 | if (m == MATCH_NO) | |
3533 | { | |
3534 | if (sym->attr.proc == PROC_ST_FUNCTION) | |
a4d9b221 | 3535 | gfc_error ("Statement function %qs requires argument list at %C", |
6de9cd9a DN |
3536 | sym->name); |
3537 | else | |
a4d9b221 | 3538 | gfc_error ("Function %qs requires an argument list at %C", |
6de9cd9a DN |
3539 | sym->name); |
3540 | ||
3541 | m = MATCH_ERROR; | |
3542 | break; | |
3543 | } | |
3544 | ||
3545 | if (m != MATCH_YES) | |
3546 | { | |
3547 | m = MATCH_ERROR; | |
3548 | break; | |
3549 | } | |
3550 | ||
3551 | gfc_get_ha_sym_tree (name, &symtree); /* Can't fail */ | |
3552 | sym = symtree->n.sym; | |
3553 | ||
3070bab4 JW |
3554 | replace_hidden_procptr_result (&sym, &symtree); |
3555 | ||
6de9cd9a DN |
3556 | e = gfc_get_expr (); |
3557 | e->symtree = symtree; | |
3558 | e->expr_type = EXPR_FUNCTION; | |
3559 | e->value.function.actual = actual_arglist; | |
63645982 | 3560 | e->where = gfc_current_locus; |
6de9cd9a | 3561 | |
102344e2 TB |
3562 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok |
3563 | && CLASS_DATA (sym)->as) | |
3564 | e->rank = CLASS_DATA (sym)->as->rank; | |
3565 | else if (sym->as != NULL) | |
6de9cd9a DN |
3566 | e->rank = sym->as->rank; |
3567 | ||
3568 | if (!sym->attr.function | |
524af0d6 | 3569 | && !gfc_add_function (&sym->attr, sym->name, NULL)) |
6de9cd9a DN |
3570 | { |
3571 | m = MATCH_ERROR; | |
3572 | break; | |
3573 | } | |
3574 | ||
a8b3b0b6 CR |
3575 | /* Check here for the existence of at least one argument for the |
3576 | iso_c_binding functions C_LOC, C_FUNLOC, and C_ASSOCIATED. The | |
3577 | argument(s) given will be checked in gfc_iso_c_func_interface, | |
3578 | during resolution of the function call. */ | |
3579 | if (sym->attr.is_iso_c == 1 | |
3580 | && (sym->from_intmod == INTMOD_ISO_C_BINDING | |
3581 | && (sym->intmod_sym_id == ISOCBINDING_LOC | |
3582 | || sym->intmod_sym_id == ISOCBINDING_FUNLOC | |
3583 | || sym->intmod_sym_id == ISOCBINDING_ASSOCIATED))) | |
3584 | { | |
3585 | /* make sure we were given a param */ | |
3586 | if (actual_arglist == NULL) | |
3587 | { | |
a4d9b221 | 3588 | gfc_error ("Missing argument to %qs at %C", sym->name); |
a8b3b0b6 CR |
3589 | m = MATCH_ERROR; |
3590 | break; | |
3591 | } | |
3592 | } | |
3593 | ||
6de9cd9a DN |
3594 | if (sym->result == NULL) |
3595 | sym->result = sym; | |
3596 | ||
20fee4a9 JW |
3597 | gfc_gobble_whitespace (); |
3598 | /* F08:C612. */ | |
3599 | if (gfc_peek_ascii_char() == '%') | |
3600 | { | |
67914693 | 3601 | gfc_error ("The leftmost part-ref in a data-ref cannot be a " |
20fee4a9 JW |
3602 | "function reference at %C"); |
3603 | m = MATCH_ERROR; | |
3604 | } | |
3605 | ||
6de9cd9a DN |
3606 | m = MATCH_YES; |
3607 | break; | |
3608 | ||
3609 | case FL_UNKNOWN: | |
3610 | ||
3611 | /* Special case for derived type variables that get their types | |
edf1eac2 SK |
3612 | via an IMPLICIT statement. This can't wait for the |
3613 | resolution phase. */ | |
6de9cd9a | 3614 | |
f6288c24 FR |
3615 | old_loc = gfc_current_locus; |
3616 | if (gfc_match_member_sep (sym) == MATCH_YES | |
0dd973dd | 3617 | && sym->ts.type == BT_UNKNOWN |
713485cc | 3618 | && gfc_get_default_type (sym->name, sym->ns)->type == BT_DERIVED) |
6de9cd9a | 3619 | gfc_set_default_type (sym, 0, sym->ns); |
f6288c24 | 3620 | gfc_current_locus = old_loc; |
6de9cd9a | 3621 | |
492792ed | 3622 | /* If the symbol has a (co)dimension attribute, the expression is a |
edf1eac2 | 3623 | variable. */ |
6de9cd9a | 3624 | |
492792ed | 3625 | if (sym->attr.dimension || sym->attr.codimension) |
6de9cd9a | 3626 | { |
524af0d6 | 3627 | if (!gfc_add_flavor (&sym->attr, FL_VARIABLE, sym->name, NULL)) |
6de9cd9a DN |
3628 | { |
3629 | m = MATCH_ERROR; | |
3630 | break; | |
3631 | } | |
3632 | ||
3633 | e = gfc_get_expr (); | |
3634 | e->symtree = symtree; | |
3635 | e->expr_type = EXPR_VARIABLE; | |
713485cc | 3636 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3637 | break; |
3638 | } | |
3639 | ||
cd99c23c | 3640 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok |
492792ed TB |
3641 | && (CLASS_DATA (sym)->attr.dimension |
3642 | || CLASS_DATA (sym)->attr.codimension)) | |
c49ea23d | 3643 | { |
524af0d6 | 3644 | if (!gfc_add_flavor (&sym->attr, FL_VARIABLE, sym->name, NULL)) |
c49ea23d PT |
3645 | { |
3646 | m = MATCH_ERROR; | |
3647 | break; | |
3648 | } | |
3649 | ||
3650 | e = gfc_get_expr (); | |
3651 | e->symtree = symtree; | |
3652 | e->expr_type = EXPR_VARIABLE; | |
3653 | m = gfc_match_varspec (e, 0, false, true); | |
3654 | break; | |
3655 | } | |
3656 | ||
6de9cd9a | 3657 | /* Name is not an array, so we peek to see if a '(' implies a |
edf1eac2 SK |
3658 | function call or a substring reference. Otherwise the |
3659 | variable is just a scalar. */ | |
6de9cd9a DN |
3660 | |
3661 | gfc_gobble_whitespace (); | |
8fc541d3 | 3662 | if (gfc_peek_ascii_char () != '(') |
6de9cd9a DN |
3663 | { |
3664 | /* Assume a scalar variable */ | |
3665 | e = gfc_get_expr (); | |
3666 | e->symtree = symtree; | |
3667 | e->expr_type = EXPR_VARIABLE; | |
3668 | ||
524af0d6 | 3669 | if (!gfc_add_flavor (&sym->attr, FL_VARIABLE, sym->name, NULL)) |
6de9cd9a DN |
3670 | { |
3671 | m = MATCH_ERROR; | |
3672 | break; | |
3673 | } | |
3674 | ||
8e1f752a | 3675 | /*FIXME:??? gfc_match_varspec does set this for us: */ |
6de9cd9a | 3676 | e->ts = sym->ts; |
713485cc | 3677 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3678 | break; |
3679 | } | |
3680 | ||
d3fcc995 TS |
3681 | /* See if this is a function reference with a keyword argument |
3682 | as first argument. We do this because otherwise a spurious | |
3683 | symbol would end up in the symbol table. */ | |
3684 | ||
3685 | old_loc = gfc_current_locus; | |
3686 | m2 = gfc_match (" ( %n =", argname); | |
3687 | gfc_current_locus = old_loc; | |
6de9cd9a DN |
3688 | |
3689 | e = gfc_get_expr (); | |
3690 | e->symtree = symtree; | |
3691 | ||
d3fcc995 | 3692 | if (m2 != MATCH_YES) |
6de9cd9a | 3693 | { |
5270c302 | 3694 | /* Try to figure out whether we're dealing with a character type. |
bf1b77dd | 3695 | We're peeking ahead here, because we don't want to call |
5270c302 AL |
3696 | match_substring if we're dealing with an implicitly typed |
3697 | non-character variable. */ | |
3698 | implicit_char = false; | |
3699 | if (sym->ts.type == BT_UNKNOWN) | |
3700 | { | |
713485cc | 3701 | ts = gfc_get_default_type (sym->name, NULL); |
5270c302 AL |
3702 | if (ts->type == BT_CHARACTER) |
3703 | implicit_char = true; | |
3704 | } | |
3705 | ||
d3fcc995 TS |
3706 | /* See if this could possibly be a substring reference of a name |
3707 | that we're not sure is a variable yet. */ | |
6de9cd9a | 3708 | |
5270c302 | 3709 | if ((implicit_char || sym->ts.type == BT_CHARACTER) |
38217d3e | 3710 | && match_substring (sym->ts.u.cl, 0, &e->ref, false) == MATCH_YES) |
6de9cd9a | 3711 | { |
6de9cd9a | 3712 | |
d3fcc995 TS |
3713 | e->expr_type = EXPR_VARIABLE; |
3714 | ||
3715 | if (sym->attr.flavor != FL_VARIABLE | |
bf1b77dd | 3716 | && !gfc_add_flavor (&sym->attr, FL_VARIABLE, |
524af0d6 | 3717 | sym->name, NULL)) |
d3fcc995 TS |
3718 | { |
3719 | m = MATCH_ERROR; | |
3720 | break; | |
3721 | } | |
3722 | ||
3723 | if (sym->ts.type == BT_UNKNOWN | |
524af0d6 | 3724 | && !gfc_set_default_type (sym, 1, NULL)) |
d3fcc995 TS |
3725 | { |
3726 | m = MATCH_ERROR; | |
3727 | break; | |
3728 | } | |
3729 | ||
3730 | e->ts = sym->ts; | |
860c8f3b | 3731 | if (e->ref) |
bc21d315 | 3732 | e->ts.u.cl = NULL; |
d3fcc995 | 3733 | m = MATCH_YES; |
6de9cd9a DN |
3734 | break; |
3735 | } | |
6de9cd9a DN |
3736 | } |
3737 | ||
3738 | /* Give up, assume we have a function. */ | |
3739 | ||
08a6b8e0 | 3740 | gfc_get_sym_tree (name, NULL, &symtree, false); /* Can't fail */ |
6de9cd9a DN |
3741 | sym = symtree->n.sym; |
3742 | e->expr_type = EXPR_FUNCTION; | |
3743 | ||
3744 | if (!sym->attr.function | |
524af0d6 | 3745 | && !gfc_add_function (&sym->attr, sym->name, NULL)) |
6de9cd9a DN |
3746 | { |
3747 | m = MATCH_ERROR; | |
3748 | break; | |
3749 | } | |
3750 | ||
3751 | sym->result = sym; | |
3752 | ||
3753 | m = gfc_match_actual_arglist (0, &e->value.function.actual); | |
3754 | if (m == MATCH_NO) | |
a4d9b221 | 3755 | gfc_error ("Missing argument list in function %qs at %C", sym->name); |
6de9cd9a DN |
3756 | |
3757 | if (m != MATCH_YES) | |
3758 | { | |
3759 | m = MATCH_ERROR; | |
3760 | break; | |
3761 | } | |
3762 | ||
3763 | /* If our new function returns a character, array or structure | |
edf1eac2 | 3764 | type, it might have subsequent references. */ |
6de9cd9a | 3765 | |
713485cc | 3766 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3767 | if (m == MATCH_NO) |
3768 | m = MATCH_YES; | |
3769 | ||
3770 | break; | |
3771 | ||
3772 | generic_function: | |
f6288c24 FR |
3773 | /* Look for symbol first; if not found, look for STRUCTURE type symbol |
3774 | specially. Creates a generic symbol for derived types. */ | |
3775 | gfc_find_sym_tree (name, NULL, 1, &symtree); | |
3776 | if (!symtree) | |
3777 | gfc_find_sym_tree (gfc_dt_upper_string (name), NULL, 1, &symtree); | |
3778 | if (!symtree || symtree->n.sym->attr.flavor != FL_STRUCT) | |
3779 | gfc_get_sym_tree (name, NULL, &symtree, false); /* Can't fail */ | |
6de9cd9a DN |
3780 | |
3781 | e = gfc_get_expr (); | |
3782 | e->symtree = symtree; | |
3783 | e->expr_type = EXPR_FUNCTION; | |
3784 | ||
f6288c24 | 3785 | if (gfc_fl_struct (sym->attr.flavor)) |
c3f34952 TB |
3786 | { |
3787 | e->value.function.esym = sym; | |
3788 | e->symtree->n.sym->attr.generic = 1; | |
3789 | } | |
3790 | ||
6de9cd9a DN |
3791 | m = gfc_match_actual_arglist (0, &e->value.function.actual); |
3792 | break; | |
3793 | ||
c0f0e35a JD |
3794 | case FL_NAMELIST: |
3795 | m = MATCH_ERROR; | |
3796 | break; | |
3797 | ||
6de9cd9a DN |
3798 | default: |
3799 | gfc_error ("Symbol at %C is not appropriate for an expression"); | |
3800 | return MATCH_ERROR; | |
3801 | } | |
3802 | ||
3803 | if (m == MATCH_YES) | |
3804 | { | |
3805 | e->where = where; | |
3806 | *result = e; | |
3807 | } | |
3808 | else | |
3809 | gfc_free_expr (e); | |
3810 | ||
3811 | return m; | |
3812 | } | |
3813 | ||
3814 | ||
df2fba9e | 3815 | /* Match a variable, i.e. something that can be assigned to. This |
6de9cd9a DN |
3816 | starts as a symbol, can be a structure component or an array |
3817 | reference. It can be a function if the function doesn't have a | |
3818 | separate RESULT variable. If the symbol has not been previously | |
30aabb86 | 3819 | seen, we assume it is a variable. |
6de9cd9a | 3820 | |
30aabb86 PT |
3821 | This function is called by two interface functions: |
3822 | gfc_match_variable, which has host_flag = 1, and | |
3823 | gfc_match_equiv_variable, with host_flag = 0, to restrict the | |
3824 | match of the symbol to the local scope. */ | |
3825 | ||
3826 | static match | |
edf1eac2 | 3827 | match_variable (gfc_expr **result, int equiv_flag, int host_flag) |
6de9cd9a | 3828 | { |
f6288c24 | 3829 | gfc_symbol *sym, *dt_sym; |
6de9cd9a DN |
3830 | gfc_symtree *st; |
3831 | gfc_expr *expr; | |
f6288c24 | 3832 | locus where, old_loc; |
6de9cd9a DN |
3833 | match m; |
3834 | ||
fd2aa7ad PT |
3835 | /* Since nothing has any business being an lvalue in a module |
3836 | specification block, an interface block or a contains section, | |
3837 | we force the changed_symbols mechanism to work by setting | |
3838 | host_flag to 0. This prevents valid symbols that have the name | |
3839 | of keywords, such as 'end', being turned into variables by | |
df2fba9e | 3840 | failed matching to assignments for, e.g., END INTERFACE. */ |
fd2aa7ad | 3841 | if (gfc_current_state () == COMP_MODULE |
4668d6f9 | 3842 | || gfc_current_state () == COMP_SUBMODULE |
fd2aa7ad PT |
3843 | || gfc_current_state () == COMP_INTERFACE |
3844 | || gfc_current_state () == COMP_CONTAINS) | |
3845 | host_flag = 0; | |
3846 | ||
618f4f46 | 3847 | where = gfc_current_locus; |
30aabb86 | 3848 | m = gfc_match_sym_tree (&st, host_flag); |
6de9cd9a DN |
3849 | if (m != MATCH_YES) |
3850 | return m; | |
6de9cd9a DN |
3851 | |
3852 | sym = st->n.sym; | |
9a3db5a3 PT |
3853 | |
3854 | /* If this is an implicit do loop index and implicitly typed, | |
3855 | it should not be host associated. */ | |
3856 | m = check_for_implicit_index (&st, &sym); | |
3857 | if (m != MATCH_YES) | |
3858 | return m; | |
3859 | ||
3860 | sym->attr.implied_index = 0; | |
3861 | ||
6de9cd9a | 3862 | gfc_set_sym_referenced (sym); |
f6288c24 FR |
3863 | |
3864 | /* STRUCTUREs may share names with variables, but derived types may not. */ | |
3865 | if (sym->attr.flavor == FL_PROCEDURE && sym->generic | |
3866 | && (dt_sym = gfc_find_dt_in_generic (sym))) | |
3867 | { | |
3868 | if (dt_sym->attr.flavor == FL_DERIVED) | |
2f029c08 | 3869 | gfc_error ("Derived type %qs cannot be used as a variable at %C", |
f6288c24 FR |
3870 | sym->name); |
3871 | return MATCH_ERROR; | |
3872 | } | |
3873 | ||
6de9cd9a DN |
3874 | switch (sym->attr.flavor) |
3875 | { | |
3876 | case FL_VARIABLE: | |
8c91ab34 | 3877 | /* Everything is alright. */ |
6de9cd9a DN |
3878 | break; |
3879 | ||
3880 | case FL_UNKNOWN: | |
d7e2fcd0 TB |
3881 | { |
3882 | sym_flavor flavor = FL_UNKNOWN; | |
3883 | ||
3884 | gfc_gobble_whitespace (); | |
3885 | ||
3886 | if (sym->attr.external || sym->attr.procedure | |
3887 | || sym->attr.function || sym->attr.subroutine) | |
3888 | flavor = FL_PROCEDURE; | |
b9332b09 PT |
3889 | |
3890 | /* If it is not a procedure, is not typed and is host associated, | |
3891 | we cannot give it a flavor yet. */ | |
3892 | else if (sym->ns == gfc_current_ns->parent | |
3893 | && sym->ts.type == BT_UNKNOWN) | |
3894 | break; | |
3895 | ||
3896 | /* These are definitive indicators that this is a variable. */ | |
8fc541d3 | 3897 | else if (gfc_peek_ascii_char () != '(' || sym->ts.type != BT_UNKNOWN |
d7e2fcd0 TB |
3898 | || sym->attr.pointer || sym->as != NULL) |
3899 | flavor = FL_VARIABLE; | |
3900 | ||
3901 | if (flavor != FL_UNKNOWN | |
524af0d6 | 3902 | && !gfc_add_flavor (&sym->attr, flavor, sym->name, NULL)) |
d7e2fcd0 TB |
3903 | return MATCH_ERROR; |
3904 | } | |
6de9cd9a DN |
3905 | break; |
3906 | ||
5056a350 SK |
3907 | case FL_PARAMETER: |
3908 | if (equiv_flag) | |
8c91ab34 DK |
3909 | { |
3910 | gfc_error ("Named constant at %C in an EQUIVALENCE"); | |
3911 | return MATCH_ERROR; | |
3912 | } | |
3913 | /* Otherwise this is checked for and an error given in the | |
3914 | variable definition context checks. */ | |
5056a350 SK |
3915 | break; |
3916 | ||
6de9cd9a | 3917 | case FL_PROCEDURE: |
01d2a7d7 DF |
3918 | /* Check for a nonrecursive function result variable. */ |
3919 | if (sym->attr.function | |
8c91ab34 DK |
3920 | && !sym->attr.external |
3921 | && sym->result == sym | |
3922 | && (gfc_is_function_return_value (sym, gfc_current_ns) | |
3923 | || (sym->attr.entry | |
3924 | && sym->ns == gfc_current_ns) | |
3925 | || (sym->attr.entry | |
3926 | && sym->ns == gfc_current_ns->parent))) | |
6de9cd9a | 3927 | { |
6de9cd9a DN |
3928 | /* If a function result is a derived type, then the derived |
3929 | type may still have to be resolved. */ | |
3930 | ||
3931 | if (sym->ts.type == BT_DERIVED | |
bc21d315 | 3932 | && gfc_use_derived (sym->ts.u.derived) == NULL) |
6de9cd9a | 3933 | return MATCH_ERROR; |
6de9cd9a DN |
3934 | break; |
3935 | } | |
3936 | ||
3070bab4 | 3937 | if (sym->attr.proc_pointer |
524af0d6 | 3938 | || replace_hidden_procptr_result (&sym, &st)) |
8fb74da4 JW |
3939 | break; |
3940 | ||
6de9cd9a | 3941 | /* Fall through to error */ |
81fea426 | 3942 | gcc_fallthrough (); |
6de9cd9a DN |
3943 | |
3944 | default: | |
a4d9b221 | 3945 | gfc_error ("%qs at %C is not a variable", sym->name); |
6de9cd9a DN |
3946 | return MATCH_ERROR; |
3947 | } | |
3948 | ||
0dd973dd PB |
3949 | /* Special case for derived type variables that get their types |
3950 | via an IMPLICIT statement. This can't wait for the | |
3951 | resolution phase. */ | |
3952 | ||
3953 | { | |
3954 | gfc_namespace * implicit_ns; | |
3955 | ||
3956 | if (gfc_current_ns->proc_name == sym) | |
3957 | implicit_ns = gfc_current_ns; | |
3958 | else | |
3959 | implicit_ns = sym->ns; | |
5bab4c96 | 3960 | |
f6288c24 FR |
3961 | old_loc = gfc_current_locus; |
3962 | if (gfc_match_member_sep (sym) == MATCH_YES | |
0dd973dd | 3963 | && sym->ts.type == BT_UNKNOWN |
713485cc | 3964 | && gfc_get_default_type (sym->name, implicit_ns)->type == BT_DERIVED) |
0dd973dd | 3965 | gfc_set_default_type (sym, 0, implicit_ns); |
f6288c24 | 3966 | gfc_current_locus = old_loc; |
0dd973dd PB |
3967 | } |
3968 | ||
6de9cd9a DN |
3969 | expr = gfc_get_expr (); |
3970 | ||
3971 | expr->expr_type = EXPR_VARIABLE; | |
3972 | expr->symtree = st; | |
3973 | expr->ts = sym->ts; | |
3974 | expr->where = where; | |
3975 | ||
3976 | /* Now see if we have to do more. */ | |
713485cc | 3977 | m = gfc_match_varspec (expr, equiv_flag, false, false); |
6de9cd9a DN |
3978 | if (m != MATCH_YES) |
3979 | { | |
3980 | gfc_free_expr (expr); | |
3981 | return m; | |
3982 | } | |
3983 | ||
3984 | *result = expr; | |
3985 | return MATCH_YES; | |
3986 | } | |
30aabb86 | 3987 | |
edf1eac2 | 3988 | |
30aabb86 | 3989 | match |
edf1eac2 | 3990 | gfc_match_variable (gfc_expr **result, int equiv_flag) |
30aabb86 PT |
3991 | { |
3992 | return match_variable (result, equiv_flag, 1); | |
3993 | } | |
3994 | ||
edf1eac2 | 3995 | |
30aabb86 | 3996 | match |
edf1eac2 | 3997 | gfc_match_equiv_variable (gfc_expr **result) |
30aabb86 PT |
3998 | { |
3999 | return match_variable (result, 1, 0); | |
4000 | } | |
4001 |