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Commit | Line | Data |
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6de9cd9a | 1 | /* Primary expression subroutines |
f4347334 ZG |
2 | Copyright (C) 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010, |
3 | 2011, 2012 | |
5056a350 | 4 | Free Software Foundation, Inc. |
6de9cd9a DN |
5 | Contributed by Andy Vaught |
6 | ||
d1d61a00 | 7 | This file is part of GCC. |
6de9cd9a | 8 | |
d1d61a00 TS |
9 | GCC is free software; you can redistribute it and/or modify it under |
10 | the terms of the GNU General Public License as published by the Free | |
d234d788 | 11 | Software Foundation; either version 3, or (at your option) any later |
d1d61a00 | 12 | version. |
6de9cd9a | 13 | |
d1d61a00 TS |
14 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
15 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
16 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
17 | for more details. | |
6de9cd9a DN |
18 | |
19 | You should have received a copy of the GNU General Public License | |
d234d788 NC |
20 | along with GCC; see the file COPYING3. If not see |
21 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a | 22 | |
6de9cd9a DN |
23 | #include "config.h" |
24 | #include "system.h" | |
25 | #include "flags.h" | |
6de9cd9a DN |
26 | #include "gfortran.h" |
27 | #include "arith.h" | |
28 | #include "match.h" | |
29 | #include "parse.h" | |
b7e75771 | 30 | #include "constructor.h" |
6de9cd9a | 31 | |
837c4b78 JW |
32 | int matching_actual_arglist = 0; |
33 | ||
6de9cd9a DN |
34 | /* Matches a kind-parameter expression, which is either a named |
35 | symbolic constant or a nonnegative integer constant. If | |
bee64a2b JW |
36 | successful, sets the kind value to the correct integer. |
37 | The argument 'is_iso_c' signals whether the kind is an ISO_C_BINDING | |
38 | symbol like e.g. 'c_int'. */ | |
6de9cd9a DN |
39 | |
40 | static match | |
bee64a2b | 41 | match_kind_param (int *kind, int *is_iso_c) |
6de9cd9a DN |
42 | { |
43 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
44 | gfc_symbol *sym; | |
45 | const char *p; | |
46 | match m; | |
47 | ||
bee64a2b JW |
48 | *is_iso_c = 0; |
49 | ||
5cf54585 | 50 | m = gfc_match_small_literal_int (kind, NULL); |
6de9cd9a DN |
51 | if (m != MATCH_NO) |
52 | return m; | |
53 | ||
54 | m = gfc_match_name (name); | |
55 | if (m != MATCH_YES) | |
56 | return m; | |
57 | ||
58 | if (gfc_find_symbol (name, NULL, 1, &sym)) | |
59 | return MATCH_ERROR; | |
60 | ||
61 | if (sym == NULL) | |
62 | return MATCH_NO; | |
63 | ||
fbe468a5 JW |
64 | *is_iso_c = sym->attr.is_iso_c; |
65 | ||
6de9cd9a DN |
66 | if (sym->attr.flavor != FL_PARAMETER) |
67 | return MATCH_NO; | |
68 | ||
1d8e1d5d PT |
69 | if (sym->value == NULL) |
70 | return MATCH_NO; | |
71 | ||
6de9cd9a DN |
72 | p = gfc_extract_int (sym->value, kind); |
73 | if (p != NULL) | |
74 | return MATCH_NO; | |
75 | ||
a39fafac FXC |
76 | gfc_set_sym_referenced (sym); |
77 | ||
6de9cd9a DN |
78 | if (*kind < 0) |
79 | return MATCH_NO; | |
80 | ||
81 | return MATCH_YES; | |
82 | } | |
83 | ||
84 | ||
85 | /* Get a trailing kind-specification for non-character variables. | |
86 | Returns: | |
bee64a2b JW |
87 | * the integer kind value or |
88 | * -1 if an error was generated, | |
89 | * -2 if no kind was found. | |
90 | The argument 'is_iso_c' signals whether the kind is an ISO_C_BINDING | |
91 | symbol like e.g. 'c_int'. */ | |
6de9cd9a DN |
92 | |
93 | static int | |
bee64a2b | 94 | get_kind (int *is_iso_c) |
6de9cd9a DN |
95 | { |
96 | int kind; | |
97 | match m; | |
98 | ||
bee64a2b JW |
99 | *is_iso_c = 0; |
100 | ||
6de9cd9a DN |
101 | if (gfc_match_char ('_') != MATCH_YES) |
102 | return -2; | |
103 | ||
bee64a2b | 104 | m = match_kind_param (&kind, is_iso_c); |
6de9cd9a DN |
105 | if (m == MATCH_NO) |
106 | gfc_error ("Missing kind-parameter at %C"); | |
107 | ||
108 | return (m == MATCH_YES) ? kind : -1; | |
109 | } | |
110 | ||
111 | ||
112 | /* Given a character and a radix, see if the character is a valid | |
113 | digit in that radix. */ | |
114 | ||
8fc541d3 FXC |
115 | int |
116 | gfc_check_digit (char c, int radix) | |
6de9cd9a DN |
117 | { |
118 | int r; | |
119 | ||
120 | switch (radix) | |
121 | { | |
122 | case 2: | |
123 | r = ('0' <= c && c <= '1'); | |
124 | break; | |
125 | ||
126 | case 8: | |
127 | r = ('0' <= c && c <= '7'); | |
128 | break; | |
129 | ||
130 | case 10: | |
131 | r = ('0' <= c && c <= '9'); | |
132 | break; | |
133 | ||
134 | case 16: | |
da8309c6 | 135 | r = ISXDIGIT (c); |
6de9cd9a DN |
136 | break; |
137 | ||
138 | default: | |
8fc541d3 | 139 | gfc_internal_error ("gfc_check_digit(): bad radix"); |
6de9cd9a DN |
140 | } |
141 | ||
142 | return r; | |
143 | } | |
144 | ||
145 | ||
146 | /* Match the digit string part of an integer if signflag is not set, | |
147 | the signed digit string part if signflag is set. If the buffer | |
148 | is NULL, we just count characters for the resolution pass. Returns | |
149 | the number of characters matched, -1 for no match. */ | |
150 | ||
151 | static int | |
152 | match_digits (int signflag, int radix, char *buffer) | |
153 | { | |
154 | locus old_loc; | |
8fc541d3 FXC |
155 | int length; |
156 | char c; | |
6de9cd9a DN |
157 | |
158 | length = 0; | |
8fc541d3 | 159 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
160 | |
161 | if (signflag && (c == '+' || c == '-')) | |
162 | { | |
163 | if (buffer != NULL) | |
164 | *buffer++ = c; | |
69029c61 | 165 | gfc_gobble_whitespace (); |
8fc541d3 | 166 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
167 | length++; |
168 | } | |
169 | ||
8fc541d3 | 170 | if (!gfc_check_digit (c, radix)) |
6de9cd9a DN |
171 | return -1; |
172 | ||
173 | length++; | |
174 | if (buffer != NULL) | |
175 | *buffer++ = c; | |
176 | ||
177 | for (;;) | |
178 | { | |
63645982 | 179 | old_loc = gfc_current_locus; |
8fc541d3 | 180 | c = gfc_next_ascii_char (); |
6de9cd9a | 181 | |
8fc541d3 | 182 | if (!gfc_check_digit (c, radix)) |
6de9cd9a DN |
183 | break; |
184 | ||
185 | if (buffer != NULL) | |
186 | *buffer++ = c; | |
187 | length++; | |
188 | } | |
189 | ||
63645982 | 190 | gfc_current_locus = old_loc; |
6de9cd9a DN |
191 | |
192 | return length; | |
193 | } | |
194 | ||
195 | ||
196 | /* Match an integer (digit string and optional kind). | |
197 | A sign will be accepted if signflag is set. */ | |
198 | ||
199 | static match | |
edf1eac2 | 200 | match_integer_constant (gfc_expr **result, int signflag) |
6de9cd9a | 201 | { |
bee64a2b | 202 | int length, kind, is_iso_c; |
6de9cd9a DN |
203 | locus old_loc; |
204 | char *buffer; | |
205 | gfc_expr *e; | |
206 | ||
63645982 | 207 | old_loc = gfc_current_locus; |
6de9cd9a DN |
208 | gfc_gobble_whitespace (); |
209 | ||
210 | length = match_digits (signflag, 10, NULL); | |
63645982 | 211 | gfc_current_locus = old_loc; |
6de9cd9a DN |
212 | if (length == -1) |
213 | return MATCH_NO; | |
214 | ||
ece3f663 | 215 | buffer = (char *) alloca (length + 1); |
6de9cd9a DN |
216 | memset (buffer, '\0', length + 1); |
217 | ||
218 | gfc_gobble_whitespace (); | |
219 | ||
220 | match_digits (signflag, 10, buffer); | |
221 | ||
bee64a2b | 222 | kind = get_kind (&is_iso_c); |
6de9cd9a | 223 | if (kind == -2) |
9d64df18 | 224 | kind = gfc_default_integer_kind; |
6de9cd9a DN |
225 | if (kind == -1) |
226 | return MATCH_ERROR; | |
227 | ||
f4347334 ZG |
228 | if (kind == 4 && gfc_option.flag_integer4_kind == 8) |
229 | kind = 8; | |
230 | ||
e7a2d5fb | 231 | if (gfc_validate_kind (BT_INTEGER, kind, true) < 0) |
6de9cd9a DN |
232 | { |
233 | gfc_error ("Integer kind %d at %C not available", kind); | |
234 | return MATCH_ERROR; | |
235 | } | |
236 | ||
63645982 | 237 | e = gfc_convert_integer (buffer, kind, 10, &gfc_current_locus); |
bee64a2b | 238 | e->ts.is_c_interop = is_iso_c; |
6de9cd9a DN |
239 | |
240 | if (gfc_range_check (e) != ARITH_OK) | |
241 | { | |
b2458f91 TB |
242 | gfc_error ("Integer too big for its kind at %C. This check can be " |
243 | "disabled with the option -fno-range-check"); | |
6de9cd9a DN |
244 | |
245 | gfc_free_expr (e); | |
246 | return MATCH_ERROR; | |
247 | } | |
248 | ||
249 | *result = e; | |
250 | return MATCH_YES; | |
251 | } | |
252 | ||
253 | ||
d3642f89 FW |
254 | /* Match a Hollerith constant. */ |
255 | ||
256 | static match | |
edf1eac2 | 257 | match_hollerith_constant (gfc_expr **result) |
d3642f89 FW |
258 | { |
259 | locus old_loc; | |
edf1eac2 SK |
260 | gfc_expr *e = NULL; |
261 | const char *msg; | |
401fcd3b | 262 | int num, pad; |
24bce1fd | 263 | int i; |
d3642f89 FW |
264 | |
265 | old_loc = gfc_current_locus; | |
266 | gfc_gobble_whitespace (); | |
267 | ||
268 | if (match_integer_constant (&e, 0) == MATCH_YES | |
edf1eac2 | 269 | && gfc_match_char ('h') == MATCH_YES) |
d3642f89 | 270 | { |
edf1eac2 SK |
271 | if (gfc_notify_std (GFC_STD_LEGACY, "Extension: Hollerith constant " |
272 | "at %C") == FAILURE) | |
d3642f89 FW |
273 | goto cleanup; |
274 | ||
275 | msg = gfc_extract_int (e, &num); | |
276 | if (msg != NULL) | |
277 | { | |
278 | gfc_error (msg); | |
279 | goto cleanup; | |
280 | } | |
281 | if (num == 0) | |
282 | { | |
edf1eac2 SK |
283 | gfc_error ("Invalid Hollerith constant: %L must contain at least " |
284 | "one character", &old_loc); | |
d3642f89 FW |
285 | goto cleanup; |
286 | } | |
287 | if (e->ts.kind != gfc_default_integer_kind) | |
288 | { | |
eb6d74fa | 289 | gfc_error ("Invalid Hollerith constant: Integer kind at %L " |
edf1eac2 | 290 | "should be default", &old_loc); |
d3642f89 FW |
291 | goto cleanup; |
292 | } | |
293 | else | |
294 | { | |
d3642f89 | 295 | gfc_free_expr (e); |
b7e75771 JD |
296 | e = gfc_get_constant_expr (BT_HOLLERITH, gfc_default_character_kind, |
297 | &gfc_current_locus); | |
20585ad6 | 298 | |
401fcd3b JD |
299 | /* Calculate padding needed to fit default integer memory. */ |
300 | pad = gfc_default_integer_kind - (num % gfc_default_integer_kind); | |
301 | ||
302 | e->representation.string = XCNEWVEC (char, num + pad + 1); | |
8fc541d3 | 303 | |
20585ad6 | 304 | for (i = 0; i < num; i++) |
00660189 | 305 | { |
696abb30 | 306 | gfc_char_t c = gfc_next_char_literal (INSTRING_WARN); |
00660189 FXC |
307 | if (! gfc_wide_fits_in_byte (c)) |
308 | { | |
309 | gfc_error ("Invalid Hollerith constant at %L contains a " | |
310 | "wide character", &old_loc); | |
311 | goto cleanup; | |
312 | } | |
313 | ||
314 | e->representation.string[i] = (unsigned char) c; | |
315 | } | |
8fc541d3 | 316 | |
401fcd3b JD |
317 | /* Now pad with blanks and end with a null char. */ |
318 | for (i = 0; i < pad; i++) | |
319 | e->representation.string[num + i] = ' '; | |
320 | ||
321 | e->representation.string[num + i] = '\0'; | |
322 | e->representation.length = num + pad; | |
323 | e->ts.u.pad = pad; | |
20585ad6 | 324 | |
d3642f89 FW |
325 | *result = e; |
326 | return MATCH_YES; | |
327 | } | |
328 | } | |
329 | ||
330 | gfc_free_expr (e); | |
331 | gfc_current_locus = old_loc; | |
332 | return MATCH_NO; | |
333 | ||
334 | cleanup: | |
335 | gfc_free_expr (e); | |
336 | return MATCH_ERROR; | |
337 | } | |
338 | ||
339 | ||
6de9cd9a | 340 | /* Match a binary, octal or hexadecimal constant that can be found in |
78019d16 SK |
341 | a DATA statement. The standard permits b'010...', o'73...', and |
342 | z'a1...' where b, o, and z can be capital letters. This function | |
343 | also accepts postfixed forms of the constants: '01...'b, '73...'o, | |
344 | and 'a1...'z. An additional extension is the use of x for z. */ | |
6de9cd9a DN |
345 | |
346 | static match | |
edf1eac2 | 347 | match_boz_constant (gfc_expr **result) |
6de9cd9a | 348 | { |
8fc541d3 | 349 | int radix, length, x_hex, kind; |
78019d16 | 350 | locus old_loc, start_loc; |
8fc541d3 | 351 | char *buffer, post, delim; |
6de9cd9a | 352 | gfc_expr *e; |
6de9cd9a | 353 | |
78019d16 | 354 | start_loc = old_loc = gfc_current_locus; |
6de9cd9a DN |
355 | gfc_gobble_whitespace (); |
356 | ||
88199e7c | 357 | x_hex = 0; |
8fc541d3 | 358 | switch (post = gfc_next_ascii_char ()) |
6de9cd9a DN |
359 | { |
360 | case 'b': | |
361 | radix = 2; | |
78019d16 | 362 | post = 0; |
6de9cd9a DN |
363 | break; |
364 | case 'o': | |
365 | radix = 8; | |
78019d16 | 366 | post = 0; |
6de9cd9a DN |
367 | break; |
368 | case 'x': | |
88199e7c | 369 | x_hex = 1; |
6de9cd9a DN |
370 | /* Fall through. */ |
371 | case 'z': | |
372 | radix = 16; | |
78019d16 SK |
373 | post = 0; |
374 | break; | |
375 | case '\'': | |
376 | /* Fall through. */ | |
377 | case '\"': | |
378 | delim = post; | |
379 | post = 1; | |
380 | radix = 16; /* Set to accept any valid digit string. */ | |
6de9cd9a DN |
381 | break; |
382 | default: | |
383 | goto backup; | |
384 | } | |
385 | ||
386 | /* No whitespace allowed here. */ | |
387 | ||
78019d16 | 388 | if (post == 0) |
8fc541d3 | 389 | delim = gfc_next_ascii_char (); |
78019d16 | 390 | |
6de9cd9a DN |
391 | if (delim != '\'' && delim != '\"') |
392 | goto backup; | |
393 | ||
00a4618b | 394 | if (x_hex |
5d874166 | 395 | && (gfc_notify_std (GFC_STD_GNU, "Extension: Hexadecimal " |
0bf0efd5 | 396 | "constant at %C uses non-standard syntax") |
5d874166 TS |
397 | == FAILURE)) |
398 | return MATCH_ERROR; | |
399 | ||
63645982 | 400 | old_loc = gfc_current_locus; |
6de9cd9a DN |
401 | |
402 | length = match_digits (0, radix, NULL); | |
403 | if (length == -1) | |
404 | { | |
78019d16 | 405 | gfc_error ("Empty set of digits in BOZ constant at %C"); |
6de9cd9a DN |
406 | return MATCH_ERROR; |
407 | } | |
408 | ||
8fc541d3 | 409 | if (gfc_next_ascii_char () != delim) |
6de9cd9a | 410 | { |
78019d16 SK |
411 | gfc_error ("Illegal character in BOZ constant at %C"); |
412 | return MATCH_ERROR; | |
413 | } | |
414 | ||
415 | if (post == 1) | |
416 | { | |
8fc541d3 | 417 | switch (gfc_next_ascii_char ()) |
78019d16 SK |
418 | { |
419 | case 'b': | |
420 | radix = 2; | |
21dac32c | 421 | break; |
78019d16 SK |
422 | case 'o': |
423 | radix = 8; | |
21dac32c | 424 | break; |
78019d16 SK |
425 | case 'x': |
426 | /* Fall through. */ | |
427 | case 'z': | |
428 | radix = 16; | |
21dac32c | 429 | break; |
31043f6c | 430 | default: |
78019d16 | 431 | goto backup; |
31043f6c | 432 | } |
0bf0efd5 TB |
433 | |
434 | if (gfc_notify_std (GFC_STD_GNU, "Extension: BOZ constant " | |
435 | "at %C uses non-standard postfix syntax") | |
436 | == FAILURE) | |
437 | return MATCH_ERROR; | |
6de9cd9a DN |
438 | } |
439 | ||
63645982 | 440 | gfc_current_locus = old_loc; |
6de9cd9a | 441 | |
ece3f663 | 442 | buffer = (char *) alloca (length + 1); |
6de9cd9a DN |
443 | memset (buffer, '\0', length + 1); |
444 | ||
445 | match_digits (0, radix, buffer); | |
8fc541d3 | 446 | gfc_next_ascii_char (); /* Eat delimiter. */ |
78019d16 | 447 | if (post == 1) |
8fc541d3 | 448 | gfc_next_ascii_char (); /* Eat postfixed b, o, z, or x. */ |
6de9cd9a | 449 | |
f4e7375a SK |
450 | /* In section 5.2.5 and following C567 in the Fortran 2003 standard, we find |
451 | "If a data-stmt-constant is a boz-literal-constant, the corresponding | |
452 | variable shall be of type integer. The boz-literal-constant is treated | |
453 | as if it were an int-literal-constant with a kind-param that specifies | |
454 | the representation method with the largest decimal exponent range | |
455 | supported by the processor." */ | |
456 | ||
457 | kind = gfc_max_integer_kind; | |
5d874166 | 458 | e = gfc_convert_integer (buffer, kind, radix, &gfc_current_locus); |
6de9cd9a | 459 | |
00a4618b TB |
460 | /* Mark as boz variable. */ |
461 | e->is_boz = 1; | |
462 | ||
6de9cd9a DN |
463 | if (gfc_range_check (e) != ARITH_OK) |
464 | { | |
5d874166 | 465 | gfc_error ("Integer too big for integer kind %i at %C", kind); |
88199e7c TS |
466 | gfc_free_expr (e); |
467 | return MATCH_ERROR; | |
468 | } | |
469 | ||
0bf0efd5 | 470 | if (!gfc_in_match_data () |
00a4618b | 471 | && (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: BOZ used outside a DATA " |
0bf0efd5 TB |
472 | "statement at %C") |
473 | == FAILURE)) | |
474 | return MATCH_ERROR; | |
475 | ||
6de9cd9a DN |
476 | *result = e; |
477 | return MATCH_YES; | |
478 | ||
479 | backup: | |
78019d16 | 480 | gfc_current_locus = start_loc; |
6de9cd9a DN |
481 | return MATCH_NO; |
482 | } | |
483 | ||
484 | ||
69029c61 | 485 | /* Match a real constant of some sort. Allow a signed constant if signflag |
00a4618b | 486 | is nonzero. */ |
6de9cd9a DN |
487 | |
488 | static match | |
edf1eac2 | 489 | match_real_constant (gfc_expr **result, int signflag) |
6de9cd9a | 490 | { |
bee64a2b | 491 | int kind, count, seen_dp, seen_digits, is_iso_c; |
6de9cd9a | 492 | locus old_loc, temp_loc; |
8fc541d3 | 493 | char *p, *buffer, c, exp_char; |
6de9cd9a | 494 | gfc_expr *e; |
69029c61 | 495 | bool negate; |
6de9cd9a | 496 | |
63645982 | 497 | old_loc = gfc_current_locus; |
6de9cd9a DN |
498 | gfc_gobble_whitespace (); |
499 | ||
500 | e = NULL; | |
501 | ||
502 | count = 0; | |
503 | seen_dp = 0; | |
504 | seen_digits = 0; | |
505 | exp_char = ' '; | |
69029c61 | 506 | negate = FALSE; |
6de9cd9a | 507 | |
8fc541d3 | 508 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
509 | if (signflag && (c == '+' || c == '-')) |
510 | { | |
69029c61 PB |
511 | if (c == '-') |
512 | negate = TRUE; | |
513 | ||
514 | gfc_gobble_whitespace (); | |
8fc541d3 | 515 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
516 | } |
517 | ||
02712c16 | 518 | /* Scan significand. */ |
8fc541d3 | 519 | for (;; c = gfc_next_ascii_char (), count++) |
6de9cd9a DN |
520 | { |
521 | if (c == '.') | |
522 | { | |
523 | if (seen_dp) | |
524 | goto done; | |
525 | ||
edf1eac2 SK |
526 | /* Check to see if "." goes with a following operator like |
527 | ".eq.". */ | |
63645982 | 528 | temp_loc = gfc_current_locus; |
8fc541d3 | 529 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
530 | |
531 | if (c == 'e' || c == 'd' || c == 'q') | |
532 | { | |
8fc541d3 | 533 | c = gfc_next_ascii_char (); |
6de9cd9a | 534 | if (c == '.') |
f7b529fa | 535 | goto done; /* Operator named .e. or .d. */ |
6de9cd9a DN |
536 | } |
537 | ||
538 | if (ISALPHA (c)) | |
539 | goto done; /* Distinguish 1.e9 from 1.eq.2 */ | |
540 | ||
63645982 | 541 | gfc_current_locus = temp_loc; |
6de9cd9a DN |
542 | seen_dp = 1; |
543 | continue; | |
544 | } | |
545 | ||
546 | if (ISDIGIT (c)) | |
547 | { | |
548 | seen_digits = 1; | |
549 | continue; | |
550 | } | |
551 | ||
552 | break; | |
553 | } | |
554 | ||
edf1eac2 | 555 | if (!seen_digits || (c != 'e' && c != 'd' && c != 'q')) |
6de9cd9a DN |
556 | goto done; |
557 | exp_char = c; | |
558 | ||
5a17346a SK |
559 | |
560 | if (c == 'q') | |
561 | { | |
562 | if (gfc_notify_std (GFC_STD_GNU, "Extension: exponent-letter 'q' in " | |
563 | "real-literal-constant at %C") == FAILURE) | |
564 | return MATCH_ERROR; | |
565 | else if (gfc_option.warn_real_q_constant) | |
566 | gfc_warning("Extension: exponent-letter 'q' in real-literal-constant " | |
567 | "at %C"); | |
568 | } | |
569 | ||
6de9cd9a | 570 | /* Scan exponent. */ |
8fc541d3 | 571 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
572 | count++; |
573 | ||
574 | if (c == '+' || c == '-') | |
575 | { /* optional sign */ | |
8fc541d3 | 576 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
577 | count++; |
578 | } | |
579 | ||
580 | if (!ISDIGIT (c)) | |
581 | { | |
6de9cd9a DN |
582 | gfc_error ("Missing exponent in real number at %C"); |
583 | return MATCH_ERROR; | |
584 | } | |
585 | ||
586 | while (ISDIGIT (c)) | |
587 | { | |
8fc541d3 | 588 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
589 | count++; |
590 | } | |
591 | ||
592 | done: | |
69029c61 | 593 | /* Check that we have a numeric constant. */ |
6de9cd9a DN |
594 | if (!seen_digits || (!seen_dp && exp_char == ' ')) |
595 | { | |
63645982 | 596 | gfc_current_locus = old_loc; |
6de9cd9a DN |
597 | return MATCH_NO; |
598 | } | |
599 | ||
600 | /* Convert the number. */ | |
63645982 | 601 | gfc_current_locus = old_loc; |
6de9cd9a DN |
602 | gfc_gobble_whitespace (); |
603 | ||
ece3f663 | 604 | buffer = (char *) alloca (count + 1); |
6de9cd9a DN |
605 | memset (buffer, '\0', count + 1); |
606 | ||
6de9cd9a | 607 | p = buffer; |
8fc541d3 | 608 | c = gfc_next_ascii_char (); |
69029c61 | 609 | if (c == '+' || c == '-') |
6de9cd9a | 610 | { |
69029c61 | 611 | gfc_gobble_whitespace (); |
8fc541d3 | 612 | c = gfc_next_ascii_char (); |
69029c61 PB |
613 | } |
614 | ||
615 | /* Hack for mpfr_set_str(). */ | |
616 | for (;;) | |
617 | { | |
618 | if (c == 'd' || c == 'q') | |
6de9cd9a | 619 | *p = 'e'; |
69029c61 PB |
620 | else |
621 | *p = c; | |
6de9cd9a | 622 | p++; |
69029c61 PB |
623 | if (--count == 0) |
624 | break; | |
625 | ||
8fc541d3 | 626 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
627 | } |
628 | ||
bee64a2b | 629 | kind = get_kind (&is_iso_c); |
6de9cd9a DN |
630 | if (kind == -1) |
631 | goto cleanup; | |
632 | ||
633 | switch (exp_char) | |
634 | { | |
635 | case 'd': | |
636 | if (kind != -2) | |
637 | { | |
edf1eac2 SK |
638 | gfc_error ("Real number at %C has a 'd' exponent and an explicit " |
639 | "kind"); | |
6de9cd9a DN |
640 | goto cleanup; |
641 | } | |
9d64df18 | 642 | kind = gfc_default_double_kind; |
f4347334 ZG |
643 | |
644 | if (kind == 4) | |
645 | { | |
646 | if (gfc_option.flag_real4_kind == 8) | |
647 | kind = 8; | |
648 | if (gfc_option.flag_real4_kind == 10) | |
649 | kind = 10; | |
650 | if (gfc_option.flag_real4_kind == 16) | |
651 | kind = 16; | |
652 | } | |
653 | ||
654 | if (kind == 8) | |
655 | { | |
656 | if (gfc_option.flag_real8_kind == 4) | |
657 | kind = 4; | |
658 | if (gfc_option.flag_real8_kind == 10) | |
659 | kind = 10; | |
660 | if (gfc_option.flag_real8_kind == 16) | |
661 | kind = 16; | |
662 | } | |
6de9cd9a DN |
663 | break; |
664 | ||
5a17346a SK |
665 | case 'q': |
666 | if (kind != -2) | |
667 | { | |
668 | gfc_error ("Real number at %C has a 'q' exponent and an explicit " | |
669 | "kind"); | |
670 | goto cleanup; | |
671 | } | |
672 | ||
673 | /* The maximum possible real kind type parameter is 16. First, try | |
674 | that for the kind, then fallback to trying kind=10 (Intel 80 bit) | |
675 | extended precision. If neither value works, just given up. */ | |
676 | kind = 16; | |
677 | if (gfc_validate_kind (BT_REAL, kind, true) < 0) | |
678 | { | |
679 | kind = 10; | |
680 | if (gfc_validate_kind (BT_REAL, kind, true) < 0) | |
681 | { | |
682 | gfc_error ("Invalid exponent-letter 'q' in " | |
683 | "real-literal-constant at %C"); | |
684 | goto cleanup; | |
685 | } | |
686 | } | |
687 | break; | |
688 | ||
6de9cd9a DN |
689 | default: |
690 | if (kind == -2) | |
9d64df18 | 691 | kind = gfc_default_real_kind; |
6de9cd9a | 692 | |
f4347334 ZG |
693 | if (kind == 4) |
694 | { | |
695 | if (gfc_option.flag_real4_kind == 8) | |
696 | kind = 8; | |
697 | if (gfc_option.flag_real4_kind == 10) | |
698 | kind = 10; | |
699 | if (gfc_option.flag_real4_kind == 16) | |
700 | kind = 16; | |
701 | } | |
702 | ||
703 | if (kind == 8) | |
704 | { | |
705 | if (gfc_option.flag_real8_kind == 4) | |
706 | kind = 4; | |
707 | if (gfc_option.flag_real8_kind == 10) | |
708 | kind = 10; | |
709 | if (gfc_option.flag_real8_kind == 16) | |
710 | kind = 16; | |
711 | } | |
712 | ||
e7a2d5fb | 713 | if (gfc_validate_kind (BT_REAL, kind, true) < 0) |
6de9cd9a DN |
714 | { |
715 | gfc_error ("Invalid real kind %d at %C", kind); | |
716 | goto cleanup; | |
717 | } | |
718 | } | |
719 | ||
63645982 | 720 | e = gfc_convert_real (buffer, kind, &gfc_current_locus); |
69029c61 PB |
721 | if (negate) |
722 | mpfr_neg (e->value.real, e->value.real, GFC_RND_MODE); | |
bee64a2b | 723 | e->ts.is_c_interop = is_iso_c; |
6de9cd9a DN |
724 | |
725 | switch (gfc_range_check (e)) | |
726 | { | |
727 | case ARITH_OK: | |
728 | break; | |
729 | case ARITH_OVERFLOW: | |
730 | gfc_error ("Real constant overflows its kind at %C"); | |
731 | goto cleanup; | |
732 | ||
733 | case ARITH_UNDERFLOW: | |
2d8b59df | 734 | if (gfc_option.warn_underflow) |
edf1eac2 | 735 | gfc_warning ("Real constant underflows its kind at %C"); |
f8e566e5 | 736 | mpfr_set_ui (e->value.real, 0, GFC_RND_MODE); |
2d8b59df | 737 | break; |
6de9cd9a DN |
738 | |
739 | default: | |
740 | gfc_internal_error ("gfc_range_check() returned bad value"); | |
741 | } | |
742 | ||
743 | *result = e; | |
744 | return MATCH_YES; | |
745 | ||
746 | cleanup: | |
747 | gfc_free_expr (e); | |
748 | return MATCH_ERROR; | |
749 | } | |
750 | ||
751 | ||
752 | /* Match a substring reference. */ | |
753 | ||
754 | static match | |
edf1eac2 | 755 | match_substring (gfc_charlen *cl, int init, gfc_ref **result) |
6de9cd9a DN |
756 | { |
757 | gfc_expr *start, *end; | |
758 | locus old_loc; | |
759 | gfc_ref *ref; | |
760 | match m; | |
761 | ||
762 | start = NULL; | |
763 | end = NULL; | |
764 | ||
63645982 | 765 | old_loc = gfc_current_locus; |
6de9cd9a DN |
766 | |
767 | m = gfc_match_char ('('); | |
768 | if (m != MATCH_YES) | |
769 | return MATCH_NO; | |
770 | ||
771 | if (gfc_match_char (':') != MATCH_YES) | |
772 | { | |
773 | if (init) | |
774 | m = gfc_match_init_expr (&start); | |
775 | else | |
776 | m = gfc_match_expr (&start); | |
777 | ||
778 | if (m != MATCH_YES) | |
779 | { | |
780 | m = MATCH_NO; | |
781 | goto cleanup; | |
782 | } | |
783 | ||
784 | m = gfc_match_char (':'); | |
785 | if (m != MATCH_YES) | |
786 | goto cleanup; | |
787 | } | |
788 | ||
789 | if (gfc_match_char (')') != MATCH_YES) | |
790 | { | |
791 | if (init) | |
792 | m = gfc_match_init_expr (&end); | |
793 | else | |
794 | m = gfc_match_expr (&end); | |
795 | ||
796 | if (m == MATCH_NO) | |
797 | goto syntax; | |
798 | if (m == MATCH_ERROR) | |
799 | goto cleanup; | |
800 | ||
801 | m = gfc_match_char (')'); | |
802 | if (m == MATCH_NO) | |
803 | goto syntax; | |
804 | } | |
805 | ||
806 | /* Optimize away the (:) reference. */ | |
807 | if (start == NULL && end == NULL) | |
808 | ref = NULL; | |
809 | else | |
810 | { | |
811 | ref = gfc_get_ref (); | |
812 | ||
813 | ref->type = REF_SUBSTRING; | |
814 | if (start == NULL) | |
b7e75771 | 815 | start = gfc_get_int_expr (gfc_default_integer_kind, NULL, 1); |
6de9cd9a DN |
816 | ref->u.ss.start = start; |
817 | if (end == NULL && cl) | |
818 | end = gfc_copy_expr (cl->length); | |
819 | ref->u.ss.end = end; | |
820 | ref->u.ss.length = cl; | |
821 | } | |
822 | ||
823 | *result = ref; | |
824 | return MATCH_YES; | |
825 | ||
826 | syntax: | |
827 | gfc_error ("Syntax error in SUBSTRING specification at %C"); | |
828 | m = MATCH_ERROR; | |
829 | ||
830 | cleanup: | |
831 | gfc_free_expr (start); | |
832 | gfc_free_expr (end); | |
833 | ||
63645982 | 834 | gfc_current_locus = old_loc; |
6de9cd9a DN |
835 | return m; |
836 | } | |
837 | ||
838 | ||
839 | /* Reads the next character of a string constant, taking care to | |
840 | return doubled delimiters on the input as a single instance of | |
841 | the delimiter. | |
842 | ||
8fc541d3 | 843 | Special return values for "ret" argument are: |
6de9cd9a DN |
844 | -1 End of the string, as determined by the delimiter |
845 | -2 Unterminated string detected | |
846 | ||
847 | Backslash codes are also expanded at this time. */ | |
848 | ||
8fc541d3 FXC |
849 | static gfc_char_t |
850 | next_string_char (gfc_char_t delimiter, int *ret) | |
6de9cd9a DN |
851 | { |
852 | locus old_locus; | |
8fc541d3 | 853 | gfc_char_t c; |
6de9cd9a | 854 | |
696abb30 | 855 | c = gfc_next_char_literal (INSTRING_WARN); |
8fc541d3 | 856 | *ret = 0; |
6de9cd9a DN |
857 | |
858 | if (c == '\n') | |
8fc541d3 FXC |
859 | { |
860 | *ret = -2; | |
861 | return 0; | |
862 | } | |
6de9cd9a | 863 | |
131c66cd | 864 | if (gfc_option.flag_backslash && c == '\\') |
6de9cd9a | 865 | { |
63645982 | 866 | old_locus = gfc_current_locus; |
6de9cd9a | 867 | |
a88a266c SK |
868 | if (gfc_match_special_char (&c) == MATCH_NO) |
869 | gfc_current_locus = old_locus; | |
2e6a83a7 SK |
870 | |
871 | if (!(gfc_option.allow_std & GFC_STD_GNU) && !inhibit_warnings) | |
872 | gfc_warning ("Extension: backslash character at %C"); | |
6de9cd9a DN |
873 | } |
874 | ||
875 | if (c != delimiter) | |
876 | return c; | |
877 | ||
63645982 | 878 | old_locus = gfc_current_locus; |
696abb30 | 879 | c = gfc_next_char_literal (NONSTRING); |
6de9cd9a DN |
880 | |
881 | if (c == delimiter) | |
882 | return c; | |
63645982 | 883 | gfc_current_locus = old_locus; |
6de9cd9a | 884 | |
8fc541d3 FXC |
885 | *ret = -1; |
886 | return 0; | |
6de9cd9a DN |
887 | } |
888 | ||
889 | ||
890 | /* Special case of gfc_match_name() that matches a parameter kind name | |
891 | before a string constant. This takes case of the weird but legal | |
4f8ea09e | 892 | case of: |
6de9cd9a DN |
893 | |
894 | kind_____'string' | |
895 | ||
896 | where kind____ is a parameter. gfc_match_name() will happily slurp | |
897 | up all the underscores, which leads to problems. If we return | |
898 | MATCH_YES, the parse pointer points to the final underscore, which | |
899 | is not part of the name. We never return MATCH_ERROR-- errors in | |
900 | the name will be detected later. */ | |
901 | ||
902 | static match | |
903 | match_charkind_name (char *name) | |
904 | { | |
905 | locus old_loc; | |
906 | char c, peek; | |
907 | int len; | |
908 | ||
909 | gfc_gobble_whitespace (); | |
8fc541d3 | 910 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
911 | if (!ISALPHA (c)) |
912 | return MATCH_NO; | |
913 | ||
914 | *name++ = c; | |
915 | len = 1; | |
916 | ||
917 | for (;;) | |
918 | { | |
63645982 | 919 | old_loc = gfc_current_locus; |
8fc541d3 | 920 | c = gfc_next_ascii_char (); |
6de9cd9a DN |
921 | |
922 | if (c == '_') | |
923 | { | |
8fc541d3 | 924 | peek = gfc_peek_ascii_char (); |
6de9cd9a DN |
925 | |
926 | if (peek == '\'' || peek == '\"') | |
927 | { | |
63645982 | 928 | gfc_current_locus = old_loc; |
6de9cd9a DN |
929 | *name = '\0'; |
930 | return MATCH_YES; | |
931 | } | |
932 | } | |
933 | ||
934 | if (!ISALNUM (c) | |
935 | && c != '_' | |
ffa61a5e | 936 | && (c != '$' || !gfc_option.flag_dollar_ok)) |
6de9cd9a DN |
937 | break; |
938 | ||
939 | *name++ = c; | |
940 | if (++len > GFC_MAX_SYMBOL_LEN) | |
941 | break; | |
942 | } | |
943 | ||
944 | return MATCH_NO; | |
945 | } | |
946 | ||
947 | ||
948 | /* See if the current input matches a character constant. Lots of | |
949 | contortions have to be done to match the kind parameter which comes | |
950 | before the actual string. The main consideration is that we don't | |
951 | want to error out too quickly. For example, we don't actually do | |
952 | any validation of the kinds until we have actually seen a legal | |
953 | delimiter. Using match_kind_param() generates errors too quickly. */ | |
954 | ||
955 | static match | |
edf1eac2 | 956 | match_string_constant (gfc_expr **result) |
6de9cd9a | 957 | { |
00660189 | 958 | char name[GFC_MAX_SYMBOL_LEN + 1], peek; |
8fc541d3 | 959 | int i, kind, length, warn_ampersand, ret; |
6de9cd9a DN |
960 | locus old_locus, start_locus; |
961 | gfc_symbol *sym; | |
962 | gfc_expr *e; | |
963 | const char *q; | |
964 | match m; | |
00660189 | 965 | gfc_char_t c, delimiter, *p; |
6de9cd9a | 966 | |
63645982 | 967 | old_locus = gfc_current_locus; |
6de9cd9a DN |
968 | |
969 | gfc_gobble_whitespace (); | |
970 | ||
6de9cd9a DN |
971 | c = gfc_next_char (); |
972 | if (c == '\'' || c == '"') | |
973 | { | |
9d64df18 | 974 | kind = gfc_default_character_kind; |
66faed76 | 975 | start_locus = gfc_current_locus; |
6de9cd9a DN |
976 | goto got_delim; |
977 | } | |
978 | ||
8fc541d3 | 979 | if (gfc_wide_is_digit (c)) |
6de9cd9a DN |
980 | { |
981 | kind = 0; | |
982 | ||
8fc541d3 | 983 | while (gfc_wide_is_digit (c)) |
6de9cd9a DN |
984 | { |
985 | kind = kind * 10 + c - '0'; | |
986 | if (kind > 9999999) | |
987 | goto no_match; | |
988 | c = gfc_next_char (); | |
989 | } | |
990 | ||
991 | } | |
992 | else | |
993 | { | |
63645982 | 994 | gfc_current_locus = old_locus; |
6de9cd9a DN |
995 | |
996 | m = match_charkind_name (name); | |
997 | if (m != MATCH_YES) | |
998 | goto no_match; | |
999 | ||
1000 | if (gfc_find_symbol (name, NULL, 1, &sym) | |
1001 | || sym == NULL | |
1002 | || sym->attr.flavor != FL_PARAMETER) | |
1003 | goto no_match; | |
1004 | ||
1005 | kind = -1; | |
1006 | c = gfc_next_char (); | |
1007 | } | |
1008 | ||
1009 | if (c == ' ') | |
1010 | { | |
1011 | gfc_gobble_whitespace (); | |
1012 | c = gfc_next_char (); | |
1013 | } | |
1014 | ||
1015 | if (c != '_') | |
1016 | goto no_match; | |
1017 | ||
1018 | gfc_gobble_whitespace (); | |
6de9cd9a DN |
1019 | |
1020 | c = gfc_next_char (); | |
1021 | if (c != '\'' && c != '"') | |
1022 | goto no_match; | |
1023 | ||
66faed76 DF |
1024 | start_locus = gfc_current_locus; |
1025 | ||
6de9cd9a DN |
1026 | if (kind == -1) |
1027 | { | |
1028 | q = gfc_extract_int (sym->value, &kind); | |
1029 | if (q != NULL) | |
1030 | { | |
1031 | gfc_error (q); | |
1032 | return MATCH_ERROR; | |
1033 | } | |
a39fafac | 1034 | gfc_set_sym_referenced (sym); |
6de9cd9a DN |
1035 | } |
1036 | ||
e7a2d5fb | 1037 | if (gfc_validate_kind (BT_CHARACTER, kind, true) < 0) |
6de9cd9a DN |
1038 | { |
1039 | gfc_error ("Invalid kind %d for CHARACTER constant at %C", kind); | |
1040 | return MATCH_ERROR; | |
1041 | } | |
1042 | ||
1043 | got_delim: | |
1044 | /* Scan the string into a block of memory by first figuring out how | |
1045 | long it is, allocating the structure, then re-reading it. This | |
1046 | isn't particularly efficient, but string constants aren't that | |
1047 | common in most code. TODO: Use obstacks? */ | |
1048 | ||
1049 | delimiter = c; | |
1050 | length = 0; | |
1051 | ||
1052 | for (;;) | |
1053 | { | |
8fc541d3 FXC |
1054 | c = next_string_char (delimiter, &ret); |
1055 | if (ret == -1) | |
6de9cd9a | 1056 | break; |
8fc541d3 | 1057 | if (ret == -2) |
6de9cd9a | 1058 | { |
63645982 | 1059 | gfc_current_locus = start_locus; |
6de9cd9a DN |
1060 | gfc_error ("Unterminated character constant beginning at %C"); |
1061 | return MATCH_ERROR; | |
1062 | } | |
1063 | ||
1064 | length++; | |
1065 | } | |
1066 | ||
78019d16 SK |
1067 | /* Peek at the next character to see if it is a b, o, z, or x for the |
1068 | postfixed BOZ literal constants. */ | |
8fc541d3 FXC |
1069 | peek = gfc_peek_ascii_char (); |
1070 | if (peek == 'b' || peek == 'o' || peek =='z' || peek == 'x') | |
78019d16 SK |
1071 | goto no_match; |
1072 | ||
b7e75771 | 1073 | e = gfc_get_character_expr (kind, &start_locus, NULL, length); |
6de9cd9a | 1074 | |
63645982 | 1075 | gfc_current_locus = start_locus; |
6de9cd9a | 1076 | |
1355d8e7 TB |
1077 | /* We disable the warning for the following loop as the warning has already |
1078 | been printed in the loop above. */ | |
1079 | warn_ampersand = gfc_option.warn_ampersand; | |
1080 | gfc_option.warn_ampersand = 0; | |
1081 | ||
b7e75771 | 1082 | p = e->value.character.string; |
6de9cd9a | 1083 | for (i = 0; i < length; i++) |
8fc541d3 FXC |
1084 | { |
1085 | c = next_string_char (delimiter, &ret); | |
1086 | ||
d393bbd7 | 1087 | if (!gfc_check_character_range (c, kind)) |
8fc541d3 | 1088 | { |
d393bbd7 FXC |
1089 | gfc_error ("Character '%s' in string at %C is not representable " |
1090 | "in character kind %d", gfc_print_wide_char (c), kind); | |
8fc541d3 FXC |
1091 | return MATCH_ERROR; |
1092 | } | |
1093 | ||
00660189 | 1094 | *p++ = c; |
8fc541d3 | 1095 | } |
6de9cd9a DN |
1096 | |
1097 | *p = '\0'; /* TODO: C-style string is for development/debug purposes. */ | |
1355d8e7 | 1098 | gfc_option.warn_ampersand = warn_ampersand; |
6de9cd9a | 1099 | |
8fc541d3 FXC |
1100 | next_string_char (delimiter, &ret); |
1101 | if (ret != -1) | |
6de9cd9a DN |
1102 | gfc_internal_error ("match_string_constant(): Delimiter not found"); |
1103 | ||
1104 | if (match_substring (NULL, 0, &e->ref) != MATCH_NO) | |
1105 | e->expr_type = EXPR_SUBSTRING; | |
1106 | ||
1107 | *result = e; | |
1108 | ||
1109 | return MATCH_YES; | |
1110 | ||
1111 | no_match: | |
63645982 | 1112 | gfc_current_locus = old_locus; |
6de9cd9a DN |
1113 | return MATCH_NO; |
1114 | } | |
1115 | ||
1116 | ||
500f8f7b RS |
1117 | /* Match a .true. or .false. Returns 1 if a .true. was found, |
1118 | 0 if a .false. was found, and -1 otherwise. */ | |
1119 | static int | |
1120 | match_logical_constant_string (void) | |
1121 | { | |
1122 | locus orig_loc = gfc_current_locus; | |
1123 | ||
1124 | gfc_gobble_whitespace (); | |
8fc541d3 | 1125 | if (gfc_next_ascii_char () == '.') |
500f8f7b | 1126 | { |
8fc541d3 | 1127 | char ch = gfc_next_ascii_char (); |
500f8f7b RS |
1128 | if (ch == 'f') |
1129 | { | |
8fc541d3 FXC |
1130 | if (gfc_next_ascii_char () == 'a' |
1131 | && gfc_next_ascii_char () == 'l' | |
1132 | && gfc_next_ascii_char () == 's' | |
1133 | && gfc_next_ascii_char () == 'e' | |
1134 | && gfc_next_ascii_char () == '.') | |
500f8f7b RS |
1135 | /* Matched ".false.". */ |
1136 | return 0; | |
1137 | } | |
1138 | else if (ch == 't') | |
1139 | { | |
8fc541d3 FXC |
1140 | if (gfc_next_ascii_char () == 'r' |
1141 | && gfc_next_ascii_char () == 'u' | |
1142 | && gfc_next_ascii_char () == 'e' | |
1143 | && gfc_next_ascii_char () == '.') | |
500f8f7b RS |
1144 | /* Matched ".true.". */ |
1145 | return 1; | |
1146 | } | |
1147 | } | |
1148 | gfc_current_locus = orig_loc; | |
1149 | return -1; | |
1150 | } | |
1151 | ||
6de9cd9a DN |
1152 | /* Match a .true. or .false. */ |
1153 | ||
1154 | static match | |
edf1eac2 | 1155 | match_logical_constant (gfc_expr **result) |
6de9cd9a | 1156 | { |
6de9cd9a | 1157 | gfc_expr *e; |
bee64a2b | 1158 | int i, kind, is_iso_c; |
6de9cd9a | 1159 | |
500f8f7b | 1160 | i = match_logical_constant_string (); |
6de9cd9a DN |
1161 | if (i == -1) |
1162 | return MATCH_NO; | |
1163 | ||
bee64a2b | 1164 | kind = get_kind (&is_iso_c); |
6de9cd9a DN |
1165 | if (kind == -1) |
1166 | return MATCH_ERROR; | |
1167 | if (kind == -2) | |
9d64df18 | 1168 | kind = gfc_default_logical_kind; |
6de9cd9a | 1169 | |
e7a2d5fb | 1170 | if (gfc_validate_kind (BT_LOGICAL, kind, true) < 0) |
eb62be44 SK |
1171 | { |
1172 | gfc_error ("Bad kind for logical constant at %C"); | |
1173 | return MATCH_ERROR; | |
1174 | } | |
6de9cd9a | 1175 | |
b7e75771 | 1176 | e = gfc_get_logical_expr (kind, &gfc_current_locus, i); |
bee64a2b | 1177 | e->ts.is_c_interop = is_iso_c; |
6de9cd9a DN |
1178 | |
1179 | *result = e; | |
1180 | return MATCH_YES; | |
1181 | } | |
1182 | ||
1183 | ||
1184 | /* Match a real or imaginary part of a complex constant that is a | |
1185 | symbolic constant. */ | |
1186 | ||
1187 | static match | |
edf1eac2 | 1188 | match_sym_complex_part (gfc_expr **result) |
6de9cd9a DN |
1189 | { |
1190 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1191 | gfc_symbol *sym; | |
1192 | gfc_expr *e; | |
1193 | match m; | |
1194 | ||
1195 | m = gfc_match_name (name); | |
1196 | if (m != MATCH_YES) | |
1197 | return m; | |
1198 | ||
1199 | if (gfc_find_symbol (name, NULL, 1, &sym) || sym == NULL) | |
1200 | return MATCH_NO; | |
1201 | ||
1202 | if (sym->attr.flavor != FL_PARAMETER) | |
1203 | { | |
1204 | gfc_error ("Expected PARAMETER symbol in complex constant at %C"); | |
1205 | return MATCH_ERROR; | |
1206 | } | |
1207 | ||
1208 | if (!gfc_numeric_ts (&sym->value->ts)) | |
1209 | { | |
1210 | gfc_error ("Numeric PARAMETER required in complex constant at %C"); | |
1211 | return MATCH_ERROR; | |
1212 | } | |
1213 | ||
1214 | if (sym->value->rank != 0) | |
1215 | { | |
1216 | gfc_error ("Scalar PARAMETER required in complex constant at %C"); | |
1217 | return MATCH_ERROR; | |
1218 | } | |
1219 | ||
e227ac57 FXC |
1220 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: PARAMETER symbol in " |
1221 | "complex constant at %C") == FAILURE) | |
1222 | return MATCH_ERROR; | |
1223 | ||
6de9cd9a DN |
1224 | switch (sym->value->ts.type) |
1225 | { | |
1226 | case BT_REAL: | |
1227 | e = gfc_copy_expr (sym->value); | |
1228 | break; | |
1229 | ||
1230 | case BT_COMPLEX: | |
1231 | e = gfc_complex2real (sym->value, sym->value->ts.kind); | |
1232 | if (e == NULL) | |
1233 | goto error; | |
1234 | break; | |
1235 | ||
1236 | case BT_INTEGER: | |
9d64df18 | 1237 | e = gfc_int2real (sym->value, gfc_default_real_kind); |
6de9cd9a DN |
1238 | if (e == NULL) |
1239 | goto error; | |
1240 | break; | |
1241 | ||
1242 | default: | |
1243 | gfc_internal_error ("gfc_match_sym_complex_part(): Bad type"); | |
1244 | } | |
1245 | ||
edf1eac2 | 1246 | *result = e; /* e is a scalar, real, constant expression. */ |
6de9cd9a DN |
1247 | return MATCH_YES; |
1248 | ||
1249 | error: | |
1250 | gfc_error ("Error converting PARAMETER constant in complex constant at %C"); | |
1251 | return MATCH_ERROR; | |
1252 | } | |
1253 | ||
1254 | ||
6de9cd9a DN |
1255 | /* Match a real or imaginary part of a complex number. */ |
1256 | ||
1257 | static match | |
edf1eac2 | 1258 | match_complex_part (gfc_expr **result) |
6de9cd9a DN |
1259 | { |
1260 | match m; | |
1261 | ||
1262 | m = match_sym_complex_part (result); | |
1263 | if (m != MATCH_NO) | |
1264 | return m; | |
1265 | ||
69029c61 PB |
1266 | m = match_real_constant (result, 1); |
1267 | if (m != MATCH_NO) | |
1268 | return m; | |
1269 | ||
1270 | return match_integer_constant (result, 1); | |
6de9cd9a DN |
1271 | } |
1272 | ||
1273 | ||
1274 | /* Try to match a complex constant. */ | |
1275 | ||
1276 | static match | |
edf1eac2 | 1277 | match_complex_constant (gfc_expr **result) |
6de9cd9a DN |
1278 | { |
1279 | gfc_expr *e, *real, *imag; | |
1280 | gfc_error_buf old_error; | |
1281 | gfc_typespec target; | |
1282 | locus old_loc; | |
1283 | int kind; | |
1284 | match m; | |
1285 | ||
63645982 | 1286 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1287 | real = imag = e = NULL; |
1288 | ||
1289 | m = gfc_match_char ('('); | |
1290 | if (m != MATCH_YES) | |
1291 | return m; | |
1292 | ||
1293 | gfc_push_error (&old_error); | |
1294 | ||
1295 | m = match_complex_part (&real); | |
1296 | if (m == MATCH_NO) | |
d71b89ca JJ |
1297 | { |
1298 | gfc_free_error (&old_error); | |
1299 | goto cleanup; | |
1300 | } | |
6de9cd9a DN |
1301 | |
1302 | if (gfc_match_char (',') == MATCH_NO) | |
1303 | { | |
1304 | gfc_pop_error (&old_error); | |
1305 | m = MATCH_NO; | |
1306 | goto cleanup; | |
1307 | } | |
1308 | ||
1309 | /* If m is error, then something was wrong with the real part and we | |
1310 | assume we have a complex constant because we've seen the ','. An | |
1311 | ambiguous case here is the start of an iterator list of some | |
1312 | sort. These sort of lists are matched prior to coming here. */ | |
1313 | ||
1314 | if (m == MATCH_ERROR) | |
d71b89ca JJ |
1315 | { |
1316 | gfc_free_error (&old_error); | |
1317 | goto cleanup; | |
1318 | } | |
6de9cd9a DN |
1319 | gfc_pop_error (&old_error); |
1320 | ||
1321 | m = match_complex_part (&imag); | |
1322 | if (m == MATCH_NO) | |
1323 | goto syntax; | |
1324 | if (m == MATCH_ERROR) | |
1325 | goto cleanup; | |
1326 | ||
1327 | m = gfc_match_char (')'); | |
1328 | if (m == MATCH_NO) | |
87ebdf2f SK |
1329 | { |
1330 | /* Give the matcher for implied do-loops a chance to run. This | |
1331 | yields a much saner error message for (/ (i, 4=i, 6) /). */ | |
8fc541d3 | 1332 | if (gfc_peek_ascii_char () == '=') |
87ebdf2f SK |
1333 | { |
1334 | m = MATCH_ERROR; | |
1335 | goto cleanup; | |
1336 | } | |
1337 | else | |
6de9cd9a | 1338 | goto syntax; |
87ebdf2f | 1339 | } |
6de9cd9a DN |
1340 | |
1341 | if (m == MATCH_ERROR) | |
1342 | goto cleanup; | |
1343 | ||
1344 | /* Decide on the kind of this complex number. */ | |
69029c61 PB |
1345 | if (real->ts.type == BT_REAL) |
1346 | { | |
1347 | if (imag->ts.type == BT_REAL) | |
1348 | kind = gfc_kind_max (real, imag); | |
1349 | else | |
1350 | kind = real->ts.kind; | |
1351 | } | |
1352 | else | |
1353 | { | |
1354 | if (imag->ts.type == BT_REAL) | |
1355 | kind = imag->ts.kind; | |
1356 | else | |
1357 | kind = gfc_default_real_kind; | |
1358 | } | |
d91909c0 | 1359 | gfc_clear_ts (&target); |
6de9cd9a DN |
1360 | target.type = BT_REAL; |
1361 | target.kind = kind; | |
1362 | ||
69029c61 | 1363 | if (real->ts.type != BT_REAL || kind != real->ts.kind) |
6de9cd9a | 1364 | gfc_convert_type (real, &target, 2); |
69029c61 | 1365 | if (imag->ts.type != BT_REAL || kind != imag->ts.kind) |
6de9cd9a DN |
1366 | gfc_convert_type (imag, &target, 2); |
1367 | ||
1368 | e = gfc_convert_complex (real, imag, kind); | |
63645982 | 1369 | e->where = gfc_current_locus; |
6de9cd9a DN |
1370 | |
1371 | gfc_free_expr (real); | |
1372 | gfc_free_expr (imag); | |
1373 | ||
1374 | *result = e; | |
1375 | return MATCH_YES; | |
1376 | ||
1377 | syntax: | |
1378 | gfc_error ("Syntax error in COMPLEX constant at %C"); | |
1379 | m = MATCH_ERROR; | |
1380 | ||
1381 | cleanup: | |
1382 | gfc_free_expr (e); | |
1383 | gfc_free_expr (real); | |
1384 | gfc_free_expr (imag); | |
63645982 | 1385 | gfc_current_locus = old_loc; |
6de9cd9a DN |
1386 | |
1387 | return m; | |
1388 | } | |
1389 | ||
1390 | ||
1391 | /* Match constants in any of several forms. Returns nonzero for a | |
1392 | match, zero for no match. */ | |
1393 | ||
1394 | match | |
edf1eac2 | 1395 | gfc_match_literal_constant (gfc_expr **result, int signflag) |
6de9cd9a DN |
1396 | { |
1397 | match m; | |
1398 | ||
1399 | m = match_complex_constant (result); | |
1400 | if (m != MATCH_NO) | |
1401 | return m; | |
1402 | ||
1403 | m = match_string_constant (result); | |
1404 | if (m != MATCH_NO) | |
1405 | return m; | |
1406 | ||
1407 | m = match_boz_constant (result); | |
1408 | if (m != MATCH_NO) | |
1409 | return m; | |
1410 | ||
1411 | m = match_real_constant (result, signflag); | |
1412 | if (m != MATCH_NO) | |
1413 | return m; | |
1414 | ||
d3642f89 FW |
1415 | m = match_hollerith_constant (result); |
1416 | if (m != MATCH_NO) | |
1417 | return m; | |
1418 | ||
6de9cd9a DN |
1419 | m = match_integer_constant (result, signflag); |
1420 | if (m != MATCH_NO) | |
1421 | return m; | |
1422 | ||
1423 | m = match_logical_constant (result); | |
1424 | if (m != MATCH_NO) | |
1425 | return m; | |
1426 | ||
1427 | return MATCH_NO; | |
1428 | } | |
1429 | ||
1430 | ||
2d71b918 JW |
1431 | /* This checks if a symbol is the return value of an encompassing function. |
1432 | Function nesting can be maximally two levels deep, but we may have | |
1433 | additional local namespaces like BLOCK etc. */ | |
1434 | ||
1435 | bool | |
1436 | gfc_is_function_return_value (gfc_symbol *sym, gfc_namespace *ns) | |
1437 | { | |
1438 | if (!sym->attr.function || (sym->result != sym)) | |
1439 | return false; | |
1440 | while (ns) | |
1441 | { | |
1442 | if (ns->proc_name == sym) | |
1443 | return true; | |
1444 | ns = ns->parent; | |
1445 | } | |
1446 | return false; | |
1447 | } | |
1448 | ||
1449 | ||
6de9cd9a DN |
1450 | /* Match a single actual argument value. An actual argument is |
1451 | usually an expression, but can also be a procedure name. If the | |
1452 | argument is a single name, it is not always possible to tell | |
1453 | whether the name is a dummy procedure or not. We treat these cases | |
1454 | by creating an argument that looks like a dummy procedure and | |
1455 | fixing things later during resolution. */ | |
1456 | ||
1457 | static match | |
edf1eac2 | 1458 | match_actual_arg (gfc_expr **result) |
6de9cd9a DN |
1459 | { |
1460 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1461 | gfc_symtree *symtree; | |
1462 | locus where, w; | |
1463 | gfc_expr *e; | |
8fc541d3 | 1464 | char c; |
6de9cd9a | 1465 | |
618f4f46 | 1466 | gfc_gobble_whitespace (); |
63645982 | 1467 | where = gfc_current_locus; |
6de9cd9a DN |
1468 | |
1469 | switch (gfc_match_name (name)) | |
1470 | { | |
1471 | case MATCH_ERROR: | |
1472 | return MATCH_ERROR; | |
1473 | ||
1474 | case MATCH_NO: | |
1475 | break; | |
1476 | ||
1477 | case MATCH_YES: | |
63645982 | 1478 | w = gfc_current_locus; |
6de9cd9a | 1479 | gfc_gobble_whitespace (); |
8fc541d3 | 1480 | c = gfc_next_ascii_char (); |
63645982 | 1481 | gfc_current_locus = w; |
6de9cd9a DN |
1482 | |
1483 | if (c != ',' && c != ')') | |
1484 | break; | |
1485 | ||
1486 | if (gfc_find_sym_tree (name, NULL, 1, &symtree)) | |
1487 | break; | |
1488 | /* Handle error elsewhere. */ | |
1489 | ||
1490 | /* Eliminate a couple of common cases where we know we don't | |
edf1eac2 | 1491 | have a function argument. */ |
6de9cd9a | 1492 | if (symtree == NULL) |
edf1eac2 | 1493 | { |
08a6b8e0 | 1494 | gfc_get_sym_tree (name, NULL, &symtree, false); |
edf1eac2 SK |
1495 | gfc_set_sym_referenced (symtree->n.sym); |
1496 | } | |
6de9cd9a DN |
1497 | else |
1498 | { | |
edf1eac2 | 1499 | gfc_symbol *sym; |
6de9cd9a | 1500 | |
edf1eac2 SK |
1501 | sym = symtree->n.sym; |
1502 | gfc_set_sym_referenced (sym); | |
6de9cd9a DN |
1503 | if (sym->attr.flavor != FL_PROCEDURE |
1504 | && sym->attr.flavor != FL_UNKNOWN) | |
1505 | break; | |
1506 | ||
6f9c9d6d TB |
1507 | if (sym->attr.in_common && !sym->attr.proc_pointer) |
1508 | { | |
1509 | gfc_add_flavor (&sym->attr, FL_VARIABLE, sym->name, | |
1510 | &sym->declared_at); | |
1511 | break; | |
1512 | } | |
1513 | ||
6de9cd9a DN |
1514 | /* If the symbol is a function with itself as the result and |
1515 | is being defined, then we have a variable. */ | |
7a4ef45b JJ |
1516 | if (sym->attr.function && sym->result == sym) |
1517 | { | |
2d71b918 | 1518 | if (gfc_is_function_return_value (sym, gfc_current_ns)) |
7a4ef45b JJ |
1519 | break; |
1520 | ||
1521 | if (sym->attr.entry | |
1522 | && (sym->ns == gfc_current_ns | |
1523 | || sym->ns == gfc_current_ns->parent)) | |
1524 | { | |
1525 | gfc_entry_list *el = NULL; | |
1526 | ||
1527 | for (el = sym->ns->entries; el; el = el->next) | |
1528 | if (sym == el->sym) | |
1529 | break; | |
1530 | ||
1531 | if (el) | |
1532 | break; | |
1533 | } | |
1534 | } | |
6de9cd9a DN |
1535 | } |
1536 | ||
1537 | e = gfc_get_expr (); /* Leave it unknown for now */ | |
1538 | e->symtree = symtree; | |
1539 | e->expr_type = EXPR_VARIABLE; | |
1540 | e->ts.type = BT_PROCEDURE; | |
1541 | e->where = where; | |
1542 | ||
1543 | *result = e; | |
1544 | return MATCH_YES; | |
1545 | } | |
1546 | ||
63645982 | 1547 | gfc_current_locus = where; |
6de9cd9a DN |
1548 | return gfc_match_expr (result); |
1549 | } | |
1550 | ||
1551 | ||
1552 | /* Match a keyword argument. */ | |
1553 | ||
1554 | static match | |
edf1eac2 | 1555 | match_keyword_arg (gfc_actual_arglist *actual, gfc_actual_arglist *base) |
6de9cd9a DN |
1556 | { |
1557 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1558 | gfc_actual_arglist *a; | |
1559 | locus name_locus; | |
1560 | match m; | |
1561 | ||
63645982 | 1562 | name_locus = gfc_current_locus; |
6de9cd9a DN |
1563 | m = gfc_match_name (name); |
1564 | ||
1565 | if (m != MATCH_YES) | |
1566 | goto cleanup; | |
1567 | if (gfc_match_char ('=') != MATCH_YES) | |
1568 | { | |
1569 | m = MATCH_NO; | |
1570 | goto cleanup; | |
1571 | } | |
1572 | ||
1573 | m = match_actual_arg (&actual->expr); | |
1574 | if (m != MATCH_YES) | |
1575 | goto cleanup; | |
1576 | ||
1577 | /* Make sure this name has not appeared yet. */ | |
1578 | ||
1579 | if (name[0] != '\0') | |
1580 | { | |
1581 | for (a = base; a; a = a->next) | |
cb9e4f55 | 1582 | if (a->name != NULL && strcmp (a->name, name) == 0) |
6de9cd9a | 1583 | { |
edf1eac2 SK |
1584 | gfc_error ("Keyword '%s' at %C has already appeared in the " |
1585 | "current argument list", name); | |
6de9cd9a DN |
1586 | return MATCH_ERROR; |
1587 | } | |
1588 | } | |
1589 | ||
cb9e4f55 | 1590 | actual->name = gfc_get_string (name); |
6de9cd9a DN |
1591 | return MATCH_YES; |
1592 | ||
1593 | cleanup: | |
63645982 | 1594 | gfc_current_locus = name_locus; |
6de9cd9a DN |
1595 | return m; |
1596 | } | |
1597 | ||
1598 | ||
7fcafa71 PT |
1599 | /* Match an argument list function, such as %VAL. */ |
1600 | ||
1601 | static match | |
1602 | match_arg_list_function (gfc_actual_arglist *result) | |
1603 | { | |
1604 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1605 | locus old_locus; | |
1606 | match m; | |
1607 | ||
1608 | old_locus = gfc_current_locus; | |
1609 | ||
1610 | if (gfc_match_char ('%') != MATCH_YES) | |
1611 | { | |
1612 | m = MATCH_NO; | |
1613 | goto cleanup; | |
1614 | } | |
1615 | ||
1616 | m = gfc_match ("%n (", name); | |
1617 | if (m != MATCH_YES) | |
1618 | goto cleanup; | |
1619 | ||
1620 | if (name[0] != '\0') | |
1621 | { | |
1622 | switch (name[0]) | |
1623 | { | |
1624 | case 'l': | |
edf1eac2 | 1625 | if (strncmp (name, "loc", 3) == 0) |
7fcafa71 PT |
1626 | { |
1627 | result->name = "%LOC"; | |
1628 | break; | |
1629 | } | |
1630 | case 'r': | |
edf1eac2 | 1631 | if (strncmp (name, "ref", 3) == 0) |
7fcafa71 PT |
1632 | { |
1633 | result->name = "%REF"; | |
1634 | break; | |
1635 | } | |
1636 | case 'v': | |
edf1eac2 | 1637 | if (strncmp (name, "val", 3) == 0) |
7fcafa71 PT |
1638 | { |
1639 | result->name = "%VAL"; | |
1640 | break; | |
1641 | } | |
1642 | default: | |
1643 | m = MATCH_ERROR; | |
1644 | goto cleanup; | |
1645 | } | |
1646 | } | |
1647 | ||
1648 | if (gfc_notify_std (GFC_STD_GNU, "Extension: argument list " | |
1649 | "function at %C") == FAILURE) | |
1650 | { | |
1651 | m = MATCH_ERROR; | |
1652 | goto cleanup; | |
1653 | } | |
1654 | ||
1655 | m = match_actual_arg (&result->expr); | |
1656 | if (m != MATCH_YES) | |
1657 | goto cleanup; | |
1658 | ||
1659 | if (gfc_match_char (')') != MATCH_YES) | |
1660 | { | |
1661 | m = MATCH_NO; | |
1662 | goto cleanup; | |
1663 | } | |
1664 | ||
1665 | return MATCH_YES; | |
1666 | ||
1667 | cleanup: | |
1668 | gfc_current_locus = old_locus; | |
1669 | return m; | |
1670 | } | |
1671 | ||
1672 | ||
6de9cd9a DN |
1673 | /* Matches an actual argument list of a function or subroutine, from |
1674 | the opening parenthesis to the closing parenthesis. The argument | |
1675 | list is assumed to allow keyword arguments because we don't know if | |
1676 | the symbol associated with the procedure has an implicit interface | |
ed5ee445 | 1677 | or not. We make sure keywords are unique. If sub_flag is set, |
d3fcc995 | 1678 | we're matching the argument list of a subroutine. */ |
6de9cd9a DN |
1679 | |
1680 | match | |
edf1eac2 | 1681 | gfc_match_actual_arglist (int sub_flag, gfc_actual_arglist **argp) |
6de9cd9a DN |
1682 | { |
1683 | gfc_actual_arglist *head, *tail; | |
1684 | int seen_keyword; | |
1685 | gfc_st_label *label; | |
1686 | locus old_loc; | |
1687 | match m; | |
1688 | ||
1689 | *argp = tail = NULL; | |
63645982 | 1690 | old_loc = gfc_current_locus; |
6de9cd9a DN |
1691 | |
1692 | seen_keyword = 0; | |
1693 | ||
1694 | if (gfc_match_char ('(') == MATCH_NO) | |
1695 | return (sub_flag) ? MATCH_YES : MATCH_NO; | |
1696 | ||
1697 | if (gfc_match_char (')') == MATCH_YES) | |
1698 | return MATCH_YES; | |
1699 | head = NULL; | |
1700 | ||
837c4b78 JW |
1701 | matching_actual_arglist++; |
1702 | ||
6de9cd9a DN |
1703 | for (;;) |
1704 | { | |
1705 | if (head == NULL) | |
1706 | head = tail = gfc_get_actual_arglist (); | |
1707 | else | |
1708 | { | |
1709 | tail->next = gfc_get_actual_arglist (); | |
1710 | tail = tail->next; | |
1711 | } | |
1712 | ||
1713 | if (sub_flag && gfc_match_char ('*') == MATCH_YES) | |
1714 | { | |
a34a91f0 | 1715 | m = gfc_match_st_label (&label); |
6de9cd9a DN |
1716 | if (m == MATCH_NO) |
1717 | gfc_error ("Expected alternate return label at %C"); | |
1718 | if (m != MATCH_YES) | |
1719 | goto cleanup; | |
1720 | ||
1721 | tail->label = label; | |
1722 | goto next; | |
1723 | } | |
1724 | ||
1725 | /* After the first keyword argument is seen, the following | |
edf1eac2 | 1726 | arguments must also have keywords. */ |
6de9cd9a DN |
1727 | if (seen_keyword) |
1728 | { | |
1729 | m = match_keyword_arg (tail, head); | |
1730 | ||
1731 | if (m == MATCH_ERROR) | |
1732 | goto cleanup; | |
1733 | if (m == MATCH_NO) | |
1734 | { | |
edf1eac2 | 1735 | gfc_error ("Missing keyword name in actual argument list at %C"); |
6de9cd9a DN |
1736 | goto cleanup; |
1737 | } | |
1738 | ||
1739 | } | |
1740 | else | |
1741 | { | |
7fcafa71 PT |
1742 | /* Try an argument list function, like %VAL. */ |
1743 | m = match_arg_list_function (tail); | |
6de9cd9a DN |
1744 | if (m == MATCH_ERROR) |
1745 | goto cleanup; | |
1746 | ||
7fcafa71 PT |
1747 | /* See if we have the first keyword argument. */ |
1748 | if (m == MATCH_NO) | |
1749 | { | |
1750 | m = match_keyword_arg (tail, head); | |
1751 | if (m == MATCH_YES) | |
1752 | seen_keyword = 1; | |
1753 | if (m == MATCH_ERROR) | |
1754 | goto cleanup; | |
1755 | } | |
1756 | ||
6de9cd9a DN |
1757 | if (m == MATCH_NO) |
1758 | { | |
1759 | /* Try for a non-keyword argument. */ | |
1760 | m = match_actual_arg (&tail->expr); | |
1761 | if (m == MATCH_ERROR) | |
1762 | goto cleanup; | |
1763 | if (m == MATCH_NO) | |
1764 | goto syntax; | |
1765 | } | |
1766 | } | |
1767 | ||
7fcafa71 | 1768 | |
6de9cd9a DN |
1769 | next: |
1770 | if (gfc_match_char (')') == MATCH_YES) | |
1771 | break; | |
1772 | if (gfc_match_char (',') != MATCH_YES) | |
1773 | goto syntax; | |
1774 | } | |
1775 | ||
1776 | *argp = head; | |
837c4b78 | 1777 | matching_actual_arglist--; |
6de9cd9a DN |
1778 | return MATCH_YES; |
1779 | ||
1780 | syntax: | |
1781 | gfc_error ("Syntax error in argument list at %C"); | |
1782 | ||
1783 | cleanup: | |
1784 | gfc_free_actual_arglist (head); | |
63645982 | 1785 | gfc_current_locus = old_loc; |
837c4b78 | 1786 | matching_actual_arglist--; |
6de9cd9a DN |
1787 | return MATCH_ERROR; |
1788 | } | |
1789 | ||
1790 | ||
8e1f752a | 1791 | /* Used by gfc_match_varspec() to extend the reference list by one |
6de9cd9a DN |
1792 | element. */ |
1793 | ||
1794 | static gfc_ref * | |
edf1eac2 | 1795 | extend_ref (gfc_expr *primary, gfc_ref *tail) |
6de9cd9a | 1796 | { |
6de9cd9a DN |
1797 | if (primary->ref == NULL) |
1798 | primary->ref = tail = gfc_get_ref (); | |
1799 | else | |
1800 | { | |
1801 | if (tail == NULL) | |
1802 | gfc_internal_error ("extend_ref(): Bad tail"); | |
1803 | tail->next = gfc_get_ref (); | |
1804 | tail = tail->next; | |
1805 | } | |
1806 | ||
1807 | return tail; | |
1808 | } | |
1809 | ||
1810 | ||
1811 | /* Match any additional specifications associated with the current | |
1812 | variable like member references or substrings. If equiv_flag is | |
1813 | set we only match stuff that is allowed inside an EQUIVALENCE | |
8e1f752a | 1814 | statement. sub_flag tells whether we expect a type-bound procedure found |
713485cc JW |
1815 | to be a subroutine as part of CALL or a FUNCTION. For procedure pointer |
1816 | components, 'ppc_arg' determines whether the PPC may be called (with an | |
1817 | argument list), or whether it may just be referred to as a pointer. */ | |
6de9cd9a | 1818 | |
8e1f752a | 1819 | match |
713485cc JW |
1820 | gfc_match_varspec (gfc_expr *primary, int equiv_flag, bool sub_flag, |
1821 | bool ppc_arg) | |
6de9cd9a DN |
1822 | { |
1823 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
1824 | gfc_ref *substring, *tail; | |
1825 | gfc_component *component; | |
a8006d09 | 1826 | gfc_symbol *sym = primary->symtree->n.sym; |
6de9cd9a | 1827 | match m; |
f2d3cb25 | 1828 | bool unknown; |
6de9cd9a DN |
1829 | |
1830 | tail = NULL; | |
1831 | ||
3c721513 | 1832 | gfc_gobble_whitespace (); |
d3a9eea2 TB |
1833 | |
1834 | if (gfc_peek_ascii_char () == '[') | |
1835 | { | |
c49ea23d PT |
1836 | if ((sym->ts.type != BT_CLASS && sym->attr.dimension) |
1837 | || (sym->ts.type == BT_CLASS && CLASS_DATA (sym) | |
1838 | && CLASS_DATA (sym)->attr.dimension)) | |
d3a9eea2 TB |
1839 | { |
1840 | gfc_error ("Array section designator, e.g. '(:)', is required " | |
1841 | "besides the coarray designator '[...]' at %C"); | |
1842 | return MATCH_ERROR; | |
1843 | } | |
c49ea23d PT |
1844 | if ((sym->ts.type != BT_CLASS && !sym->attr.codimension) |
1845 | || (sym->ts.type == BT_CLASS && CLASS_DATA (sym) | |
1846 | && !CLASS_DATA (sym)->attr.codimension)) | |
d3a9eea2 TB |
1847 | { |
1848 | gfc_error ("Coarray designator at %C but '%s' is not a coarray", | |
1849 | sym->name); | |
1850 | return MATCH_ERROR; | |
1851 | } | |
1852 | } | |
1853 | ||
52bf62f9 DK |
1854 | /* For associate names, we may not yet know whether they are arrays or not. |
1855 | Thus if we have one and parentheses follow, we have to assume that it | |
1856 | actually is one for now. The final decision will be made at | |
1857 | resolution time, of course. */ | |
1858 | if (sym->assoc && gfc_peek_ascii_char () == '(') | |
1859 | sym->attr.dimension = 1; | |
1860 | ||
c74b74a8 | 1861 | if ((equiv_flag && gfc_peek_ascii_char () == '(') |
d3a9eea2 | 1862 | || gfc_peek_ascii_char () == '[' || sym->attr.codimension |
ce2ab24c JW |
1863 | || (sym->attr.dimension && sym->ts.type != BT_CLASS |
1864 | && !sym->attr.proc_pointer && !gfc_is_proc_ptr_comp (primary, NULL) | |
f64edc8b | 1865 | && !(gfc_matching_procptr_assignment |
cf2b3c22 | 1866 | && sym->attr.flavor == FL_PROCEDURE)) |
22061030 | 1867 | || (sym->ts.type == BT_CLASS && sym->attr.class_ok |
492792ed TB |
1868 | && (CLASS_DATA (sym)->attr.dimension |
1869 | || CLASS_DATA (sym)->attr.codimension))) | |
6de9cd9a | 1870 | { |
102344e2 TB |
1871 | gfc_array_spec *as; |
1872 | ||
1873 | tail = extend_ref (primary, tail); | |
1874 | tail->type = REF_ARRAY; | |
1875 | ||
a8006d09 JJ |
1876 | /* In EQUIVALENCE, we don't know yet whether we are seeing |
1877 | an array, character variable or array of character | |
edf1eac2 | 1878 | variables. We'll leave the decision till resolve time. */ |
6de9cd9a | 1879 | |
102344e2 TB |
1880 | if (equiv_flag) |
1881 | as = NULL; | |
1882 | else if (sym->ts.type == BT_CLASS && CLASS_DATA (sym)) | |
1883 | as = CLASS_DATA (sym)->as; | |
1884 | else | |
1885 | as = sym->as; | |
1886 | ||
1887 | m = gfc_match_array_ref (&tail->u.ar, as, equiv_flag, | |
1888 | as ? as->corank : 0); | |
6de9cd9a DN |
1889 | if (m != MATCH_YES) |
1890 | return m; | |
a8006d09 | 1891 | |
3c721513 | 1892 | gfc_gobble_whitespace (); |
8fc541d3 | 1893 | if (equiv_flag && gfc_peek_ascii_char () == '(') |
a8006d09 JJ |
1894 | { |
1895 | tail = extend_ref (primary, tail); | |
1896 | tail->type = REF_ARRAY; | |
1897 | ||
d3a9eea2 | 1898 | m = gfc_match_array_ref (&tail->u.ar, NULL, equiv_flag, 0); |
a8006d09 JJ |
1899 | if (m != MATCH_YES) |
1900 | return m; | |
1901 | } | |
6de9cd9a DN |
1902 | } |
1903 | ||
6de9cd9a DN |
1904 | primary->ts = sym->ts; |
1905 | ||
a8006d09 JJ |
1906 | if (equiv_flag) |
1907 | return MATCH_YES; | |
1908 | ||
ebac6d9c | 1909 | if (sym->ts.type == BT_UNKNOWN && gfc_peek_ascii_char () == '%' |
713485cc | 1910 | && gfc_get_default_type (sym->name, sym->ns)->type == BT_DERIVED) |
ebac6d9c DK |
1911 | gfc_set_default_type (sym, 0, sym->ns); |
1912 | ||
cf2b3c22 TB |
1913 | if ((sym->ts.type != BT_DERIVED && sym->ts.type != BT_CLASS) |
1914 | || gfc_match_char ('%') != MATCH_YES) | |
6de9cd9a DN |
1915 | goto check_substring; |
1916 | ||
bc21d315 | 1917 | sym = sym->ts.u.derived; |
6de9cd9a DN |
1918 | |
1919 | for (;;) | |
1920 | { | |
8e1f752a | 1921 | gfc_try t; |
e157f736 | 1922 | gfc_symtree *tbp; |
8e1f752a | 1923 | |
6de9cd9a DN |
1924 | m = gfc_match_name (name); |
1925 | if (m == MATCH_NO) | |
1926 | gfc_error ("Expected structure component name at %C"); | |
1927 | if (m != MATCH_YES) | |
1928 | return MATCH_ERROR; | |
1929 | ||
b2acf594 PT |
1930 | if (sym->f2k_derived) |
1931 | tbp = gfc_find_typebound_proc (sym, &t, name, false, &gfc_current_locus); | |
1932 | else | |
1933 | tbp = NULL; | |
1934 | ||
8e1f752a DK |
1935 | if (tbp) |
1936 | { | |
1937 | gfc_symbol* tbp_sym; | |
1938 | ||
1939 | if (t == FAILURE) | |
1940 | return MATCH_ERROR; | |
1941 | ||
1942 | gcc_assert (!tail || !tail->next); | |
4618de23 TB |
1943 | gcc_assert (primary->expr_type == EXPR_VARIABLE |
1944 | || (primary->expr_type == EXPR_STRUCTURE | |
1945 | && primary->symtree && primary->symtree->n.sym | |
1946 | && primary->symtree->n.sym->attr.flavor)); | |
8e1f752a | 1947 | |
e34ccb4c | 1948 | if (tbp->n.tb->is_generic) |
e157f736 DK |
1949 | tbp_sym = NULL; |
1950 | else | |
e34ccb4c | 1951 | tbp_sym = tbp->n.tb->u.specific->n.sym; |
8e1f752a DK |
1952 | |
1953 | primary->expr_type = EXPR_COMPCALL; | |
e34ccb4c | 1954 | primary->value.compcall.tbp = tbp->n.tb; |
e157f736 | 1955 | primary->value.compcall.name = tbp->name; |
4a44a72d DK |
1956 | primary->value.compcall.ignore_pass = 0; |
1957 | primary->value.compcall.assign = 0; | |
1958 | primary->value.compcall.base_object = NULL; | |
e157f736 DK |
1959 | gcc_assert (primary->symtree->n.sym->attr.referenced); |
1960 | if (tbp_sym) | |
1961 | primary->ts = tbp_sym->ts; | |
1962 | ||
e34ccb4c | 1963 | m = gfc_match_actual_arglist (tbp->n.tb->subroutine, |
8e1f752a DK |
1964 | &primary->value.compcall.actual); |
1965 | if (m == MATCH_ERROR) | |
1966 | return MATCH_ERROR; | |
1967 | if (m == MATCH_NO) | |
1968 | { | |
1969 | if (sub_flag) | |
1970 | primary->value.compcall.actual = NULL; | |
1971 | else | |
1972 | { | |
1973 | gfc_error ("Expected argument list at %C"); | |
1974 | return MATCH_ERROR; | |
1975 | } | |
1976 | } | |
1977 | ||
8e1f752a DK |
1978 | break; |
1979 | } | |
1980 | ||
9d1210f4 | 1981 | component = gfc_find_component (sym, name, false, false); |
6de9cd9a DN |
1982 | if (component == NULL) |
1983 | return MATCH_ERROR; | |
1984 | ||
1985 | tail = extend_ref (primary, tail); | |
1986 | tail->type = REF_COMPONENT; | |
1987 | ||
1988 | tail->u.c.component = component; | |
1989 | tail->u.c.sym = sym; | |
1990 | ||
1991 | primary->ts = component->ts; | |
1992 | ||
713485cc JW |
1993 | if (component->attr.proc_pointer && ppc_arg |
1994 | && !gfc_matching_procptr_assignment) | |
1995 | { | |
837c4b78 | 1996 | /* Procedure pointer component call: Look for argument list. */ |
23878536 | 1997 | m = gfc_match_actual_arglist (sub_flag, |
713485cc JW |
1998 | &primary->value.compcall.actual); |
1999 | if (m == MATCH_ERROR) | |
2000 | return MATCH_ERROR; | |
837c4b78 JW |
2001 | |
2002 | if (m == MATCH_NO && !gfc_matching_ptr_assignment | |
2003 | && !matching_actual_arglist) | |
2004 | { | |
2005 | gfc_error ("Procedure pointer component '%s' requires an " | |
2006 | "argument list at %C", component->name); | |
2007 | return MATCH_ERROR; | |
2008 | } | |
2009 | ||
23878536 JW |
2010 | if (m == MATCH_YES) |
2011 | primary->expr_type = EXPR_PPC; | |
713485cc JW |
2012 | |
2013 | break; | |
2014 | } | |
2015 | ||
c74b74a8 | 2016 | if (component->as != NULL && !component->attr.proc_pointer) |
6de9cd9a DN |
2017 | { |
2018 | tail = extend_ref (primary, tail); | |
2019 | tail->type = REF_ARRAY; | |
2020 | ||
d3a9eea2 TB |
2021 | m = gfc_match_array_ref (&tail->u.ar, component->as, equiv_flag, |
2022 | component->as->corank); | |
6de9cd9a DN |
2023 | if (m != MATCH_YES) |
2024 | return m; | |
2025 | } | |
cf2b3c22 | 2026 | else if (component->ts.type == BT_CLASS |
7a08eda1 | 2027 | && CLASS_DATA (component)->as != NULL |
cf2b3c22 TB |
2028 | && !component->attr.proc_pointer) |
2029 | { | |
2030 | tail = extend_ref (primary, tail); | |
2031 | tail->type = REF_ARRAY; | |
6de9cd9a | 2032 | |
7a08eda1 | 2033 | m = gfc_match_array_ref (&tail->u.ar, CLASS_DATA (component)->as, |
d3a9eea2 | 2034 | equiv_flag, |
7a08eda1 | 2035 | CLASS_DATA (component)->as->corank); |
cf2b3c22 TB |
2036 | if (m != MATCH_YES) |
2037 | return m; | |
2038 | } | |
2039 | ||
2040 | if ((component->ts.type != BT_DERIVED && component->ts.type != BT_CLASS) | |
6de9cd9a DN |
2041 | || gfc_match_char ('%') != MATCH_YES) |
2042 | break; | |
2043 | ||
bc21d315 | 2044 | sym = component->ts.u.derived; |
6de9cd9a DN |
2045 | } |
2046 | ||
2047 | check_substring: | |
f2d3cb25 | 2048 | unknown = false; |
cf2b3c22 | 2049 | if (primary->ts.type == BT_UNKNOWN && sym->attr.flavor != FL_DERIVED) |
c040ffff | 2050 | { |
713485cc | 2051 | if (gfc_get_default_type (sym->name, sym->ns)->type == BT_CHARACTER) |
c040ffff | 2052 | { |
edf1eac2 SK |
2053 | gfc_set_default_type (sym, 0, sym->ns); |
2054 | primary->ts = sym->ts; | |
f2d3cb25 | 2055 | unknown = true; |
c040ffff TS |
2056 | } |
2057 | } | |
2058 | ||
6de9cd9a DN |
2059 | if (primary->ts.type == BT_CHARACTER) |
2060 | { | |
bc21d315 | 2061 | switch (match_substring (primary->ts.u.cl, equiv_flag, &substring)) |
6de9cd9a DN |
2062 | { |
2063 | case MATCH_YES: | |
2064 | if (tail == NULL) | |
2065 | primary->ref = substring; | |
2066 | else | |
2067 | tail->next = substring; | |
2068 | ||
2069 | if (primary->expr_type == EXPR_CONSTANT) | |
2070 | primary->expr_type = EXPR_SUBSTRING; | |
2071 | ||
860c8f3b | 2072 | if (substring) |
bc21d315 | 2073 | primary->ts.u.cl = NULL; |
860c8f3b | 2074 | |
6de9cd9a DN |
2075 | break; |
2076 | ||
2077 | case MATCH_NO: | |
f2d3cb25 | 2078 | if (unknown) |
858f1fa2 DK |
2079 | { |
2080 | gfc_clear_ts (&primary->ts); | |
2081 | gfc_clear_ts (&sym->ts); | |
2082 | } | |
6de9cd9a DN |
2083 | break; |
2084 | ||
2085 | case MATCH_ERROR: | |
2086 | return MATCH_ERROR; | |
2087 | } | |
2088 | } | |
2089 | ||
d3a9eea2 TB |
2090 | /* F2008, C727. */ |
2091 | if (primary->expr_type == EXPR_PPC && gfc_is_coindexed (primary)) | |
2092 | { | |
2093 | gfc_error ("Coindexed procedure-pointer component at %C"); | |
2094 | return MATCH_ERROR; | |
2095 | } | |
2096 | ||
6de9cd9a DN |
2097 | return MATCH_YES; |
2098 | } | |
2099 | ||
2100 | ||
2101 | /* Given an expression that is a variable, figure out what the | |
2102 | ultimate variable's type and attribute is, traversing the reference | |
2103 | structures if necessary. | |
2104 | ||
2105 | This subroutine is trickier than it looks. We start at the base | |
2106 | symbol and store the attribute. Component references load a | |
2107 | completely new attribute. | |
2108 | ||
2109 | A couple of rules come into play. Subobjects of targets are always | |
2110 | targets themselves. If we see a component that goes through a | |
2111 | pointer, then the expression must also be a target, since the | |
2112 | pointer is associated with something (if it isn't core will soon be | |
2113 | dumped). If we see a full part or section of an array, the | |
2114 | expression is also an array. | |
2115 | ||
f7b529fa | 2116 | We can have at most one full array reference. */ |
6de9cd9a DN |
2117 | |
2118 | symbol_attribute | |
edf1eac2 | 2119 | gfc_variable_attr (gfc_expr *expr, gfc_typespec *ts) |
6de9cd9a | 2120 | { |
5046aff5 | 2121 | int dimension, pointer, allocatable, target; |
6de9cd9a DN |
2122 | symbol_attribute attr; |
2123 | gfc_ref *ref; | |
cf2b3c22 TB |
2124 | gfc_symbol *sym; |
2125 | gfc_component *comp; | |
6de9cd9a | 2126 | |
50dbf0b4 | 2127 | if (expr->expr_type != EXPR_VARIABLE && expr->expr_type != EXPR_FUNCTION) |
6de9cd9a DN |
2128 | gfc_internal_error ("gfc_variable_attr(): Expression isn't a variable"); |
2129 | ||
cf2b3c22 TB |
2130 | sym = expr->symtree->n.sym; |
2131 | attr = sym->attr; | |
6de9cd9a | 2132 | |
528622fd | 2133 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok) |
cf2b3c22 | 2134 | { |
7a08eda1 | 2135 | dimension = CLASS_DATA (sym)->attr.dimension; |
d40477b4 | 2136 | pointer = CLASS_DATA (sym)->attr.class_pointer; |
7a08eda1 | 2137 | allocatable = CLASS_DATA (sym)->attr.allocatable; |
cf2b3c22 TB |
2138 | } |
2139 | else | |
2140 | { | |
2141 | dimension = attr.dimension; | |
2142 | pointer = attr.pointer; | |
2143 | allocatable = attr.allocatable; | |
2144 | } | |
6de9cd9a DN |
2145 | |
2146 | target = attr.target; | |
713485cc | 2147 | if (pointer || attr.proc_pointer) |
6de9cd9a DN |
2148 | target = 1; |
2149 | ||
2150 | if (ts != NULL && expr->ts.type == BT_UNKNOWN) | |
cf2b3c22 | 2151 | *ts = sym->ts; |
6de9cd9a | 2152 | |
8c91ab34 | 2153 | for (ref = expr->ref; ref; ref = ref->next) |
6de9cd9a DN |
2154 | switch (ref->type) |
2155 | { | |
2156 | case REF_ARRAY: | |
2157 | ||
2158 | switch (ref->u.ar.type) | |
2159 | { | |
2160 | case AR_FULL: | |
2161 | dimension = 1; | |
2162 | break; | |
2163 | ||
2164 | case AR_SECTION: | |
5046aff5 | 2165 | allocatable = pointer = 0; |
6de9cd9a DN |
2166 | dimension = 1; |
2167 | break; | |
2168 | ||
2169 | case AR_ELEMENT: | |
d3a9eea2 TB |
2170 | /* Handle coarrays. */ |
2171 | if (ref->u.ar.dimen > 0) | |
2172 | allocatable = pointer = 0; | |
6de9cd9a DN |
2173 | break; |
2174 | ||
2175 | case AR_UNKNOWN: | |
2176 | gfc_internal_error ("gfc_variable_attr(): Bad array reference"); | |
2177 | } | |
2178 | ||
2179 | break; | |
2180 | ||
2181 | case REF_COMPONENT: | |
cf2b3c22 TB |
2182 | comp = ref->u.c.component; |
2183 | attr = comp->attr; | |
6de9cd9a | 2184 | if (ts != NULL) |
e8a25349 | 2185 | { |
cf2b3c22 | 2186 | *ts = comp->ts; |
e8a25349 TS |
2187 | /* Don't set the string length if a substring reference |
2188 | follows. */ | |
2189 | if (ts->type == BT_CHARACTER | |
2190 | && ref->next && ref->next->type == REF_SUBSTRING) | |
bc21d315 | 2191 | ts->u.cl = NULL; |
e8a25349 | 2192 | } |
6de9cd9a | 2193 | |
cf2b3c22 TB |
2194 | if (comp->ts.type == BT_CLASS) |
2195 | { | |
d40477b4 | 2196 | pointer = CLASS_DATA (comp)->attr.class_pointer; |
7a08eda1 | 2197 | allocatable = CLASS_DATA (comp)->attr.allocatable; |
cf2b3c22 TB |
2198 | } |
2199 | else | |
2200 | { | |
2201 | pointer = comp->attr.pointer; | |
2202 | allocatable = comp->attr.allocatable; | |
2203 | } | |
713485cc | 2204 | if (pointer || attr.proc_pointer) |
6de9cd9a DN |
2205 | target = 1; |
2206 | ||
2207 | break; | |
2208 | ||
2209 | case REF_SUBSTRING: | |
5046aff5 | 2210 | allocatable = pointer = 0; |
6de9cd9a DN |
2211 | break; |
2212 | } | |
2213 | ||
2214 | attr.dimension = dimension; | |
2215 | attr.pointer = pointer; | |
5046aff5 | 2216 | attr.allocatable = allocatable; |
6de9cd9a | 2217 | attr.target = target; |
80f95228 | 2218 | attr.save = sym->attr.save; |
6de9cd9a DN |
2219 | |
2220 | return attr; | |
2221 | } | |
2222 | ||
2223 | ||
2224 | /* Return the attribute from a general expression. */ | |
2225 | ||
2226 | symbol_attribute | |
edf1eac2 | 2227 | gfc_expr_attr (gfc_expr *e) |
6de9cd9a DN |
2228 | { |
2229 | symbol_attribute attr; | |
2230 | ||
2231 | switch (e->expr_type) | |
2232 | { | |
2233 | case EXPR_VARIABLE: | |
2234 | attr = gfc_variable_attr (e, NULL); | |
2235 | break; | |
2236 | ||
2237 | case EXPR_FUNCTION: | |
2238 | gfc_clear_attr (&attr); | |
2239 | ||
2240 | if (e->value.function.esym != NULL) | |
cf2b3c22 TB |
2241 | { |
2242 | gfc_symbol *sym = e->value.function.esym->result; | |
2243 | attr = sym->attr; | |
2244 | if (sym->ts.type == BT_CLASS) | |
2245 | { | |
7a08eda1 | 2246 | attr.dimension = CLASS_DATA (sym)->attr.dimension; |
d40477b4 | 2247 | attr.pointer = CLASS_DATA (sym)->attr.class_pointer; |
7a08eda1 | 2248 | attr.allocatable = CLASS_DATA (sym)->attr.allocatable; |
cf2b3c22 TB |
2249 | } |
2250 | } | |
50dbf0b4 JW |
2251 | else |
2252 | attr = gfc_variable_attr (e, NULL); | |
6de9cd9a DN |
2253 | |
2254 | /* TODO: NULL() returns pointers. May have to take care of this | |
edf1eac2 | 2255 | here. */ |
6de9cd9a DN |
2256 | |
2257 | break; | |
2258 | ||
2259 | default: | |
2260 | gfc_clear_attr (&attr); | |
2261 | break; | |
2262 | } | |
2263 | ||
2264 | return attr; | |
2265 | } | |
2266 | ||
2267 | ||
2268 | /* Match a structure constructor. The initial symbol has already been | |
2269 | seen. */ | |
2270 | ||
fa9290d3 DK |
2271 | typedef struct gfc_structure_ctor_component |
2272 | { | |
2273 | char* name; | |
2274 | gfc_expr* val; | |
2275 | locus where; | |
2276 | struct gfc_structure_ctor_component* next; | |
2277 | } | |
2278 | gfc_structure_ctor_component; | |
2279 | ||
ece3f663 | 2280 | #define gfc_get_structure_ctor_component() XCNEW (gfc_structure_ctor_component) |
fa9290d3 DK |
2281 | |
2282 | static void | |
2283 | gfc_free_structure_ctor_component (gfc_structure_ctor_component *comp) | |
2284 | { | |
cede9502 | 2285 | free (comp->name); |
fa9290d3 | 2286 | gfc_free_expr (comp->val); |
cede9502 | 2287 | free (comp); |
fa9290d3 DK |
2288 | } |
2289 | ||
7d1f1e61 PT |
2290 | |
2291 | /* Translate the component list into the actual constructor by sorting it in | |
2292 | the order required; this also checks along the way that each and every | |
2293 | component actually has an initializer and handles default initializers | |
2294 | for components without explicit value given. */ | |
2295 | static gfc_try | |
2296 | build_actual_constructor (gfc_structure_ctor_component **comp_head, | |
b7e75771 | 2297 | gfc_constructor_base *ctor_head, gfc_symbol *sym) |
6de9cd9a | 2298 | { |
fa9290d3 | 2299 | gfc_structure_ctor_component *comp_iter; |
7d1f1e61 PT |
2300 | gfc_component *comp; |
2301 | ||
2302 | for (comp = sym->components; comp; comp = comp->next) | |
2303 | { | |
2304 | gfc_structure_ctor_component **next_ptr; | |
2305 | gfc_expr *value = NULL; | |
2306 | ||
2307 | /* Try to find the initializer for the current component by name. */ | |
2308 | next_ptr = comp_head; | |
2309 | for (comp_iter = *comp_head; comp_iter; comp_iter = comp_iter->next) | |
2310 | { | |
2311 | if (!strcmp (comp_iter->name, comp->name)) | |
2312 | break; | |
2313 | next_ptr = &comp_iter->next; | |
2314 | } | |
2315 | ||
2316 | /* If an extension, try building the parent derived type by building | |
2317 | a value expression for the parent derived type and calling self. */ | |
2318 | if (!comp_iter && comp == sym->components && sym->attr.extension) | |
2319 | { | |
b7e75771 JD |
2320 | value = gfc_get_structure_constructor_expr (comp->ts.type, |
2321 | comp->ts.kind, | |
2322 | &gfc_current_locus); | |
7d1f1e61 | 2323 | value->ts = comp->ts; |
7d1f1e61 PT |
2324 | |
2325 | if (build_actual_constructor (comp_head, &value->value.constructor, | |
bc21d315 | 2326 | comp->ts.u.derived) == FAILURE) |
7d1f1e61 PT |
2327 | { |
2328 | gfc_free_expr (value); | |
2329 | return FAILURE; | |
2330 | } | |
b7e75771 JD |
2331 | |
2332 | gfc_constructor_append_expr (ctor_head, value, NULL); | |
7d1f1e61 PT |
2333 | continue; |
2334 | } | |
2335 | ||
2336 | /* If it was not found, try the default initializer if there's any; | |
2337 | otherwise, it's an error. */ | |
2338 | if (!comp_iter) | |
2339 | { | |
2340 | if (comp->initializer) | |
2341 | { | |
2342 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Structure" | |
2343 | " constructor with missing optional arguments" | |
2344 | " at %C") == FAILURE) | |
2345 | return FAILURE; | |
2346 | value = gfc_copy_expr (comp->initializer); | |
2347 | } | |
2348 | else | |
2349 | { | |
2350 | gfc_error ("No initializer for component '%s' given in the" | |
2351 | " structure constructor at %C!", comp->name); | |
2352 | return FAILURE; | |
2353 | } | |
2354 | } | |
2355 | else | |
2356 | value = comp_iter->val; | |
2357 | ||
2358 | /* Add the value to the constructor chain built. */ | |
b7e75771 | 2359 | gfc_constructor_append_expr (ctor_head, value, NULL); |
7d1f1e61 PT |
2360 | |
2361 | /* Remove the entry from the component list. We don't want the expression | |
2362 | value to be free'd, so set it to NULL. */ | |
2363 | if (comp_iter) | |
2364 | { | |
2365 | *next_ptr = comp_iter->next; | |
2366 | comp_iter->val = NULL; | |
2367 | gfc_free_structure_ctor_component (comp_iter); | |
2368 | } | |
2369 | } | |
2370 | return SUCCESS; | |
2371 | } | |
2372 | ||
c3f34952 TB |
2373 | |
2374 | gfc_try | |
2375 | gfc_convert_to_structure_constructor (gfc_expr *e, gfc_symbol *sym, gfc_expr **cexpr, | |
2376 | gfc_actual_arglist **arglist, | |
2377 | bool parent) | |
7d1f1e61 | 2378 | { |
c3f34952 | 2379 | gfc_actual_arglist *actual; |
7d1f1e61 | 2380 | gfc_structure_ctor_component *comp_tail, *comp_head, *comp_iter; |
b7e75771 | 2381 | gfc_constructor_base ctor_head = NULL; |
fa9290d3 | 2382 | gfc_component *comp; /* Is set NULL when named component is first seen */ |
fa9290d3 | 2383 | const char* last_name = NULL; |
c3f34952 TB |
2384 | locus old_locus; |
2385 | gfc_expr *expr; | |
6de9cd9a | 2386 | |
c3f34952 TB |
2387 | expr = parent ? *cexpr : e; |
2388 | old_locus = gfc_current_locus; | |
2389 | if (parent) | |
2390 | ; /* gfc_current_locus = *arglist->expr ? ->where;*/ | |
2391 | else | |
2392 | gfc_current_locus = expr->where; | |
6de9cd9a | 2393 | |
c3f34952 | 2394 | comp_tail = comp_head = NULL; |
6de9cd9a | 2395 | |
52f49934 DK |
2396 | if (!parent && sym->attr.abstract) |
2397 | { | |
c3f34952 TB |
2398 | gfc_error ("Can't construct ABSTRACT type '%s' at %L", |
2399 | sym->name, &expr->where); | |
2400 | goto cleanup; | |
52f49934 DK |
2401 | } |
2402 | ||
c3f34952 TB |
2403 | comp = sym->components; |
2404 | actual = parent ? *arglist : expr->value.function.actual; | |
2405 | for ( ; actual; ) | |
6de9cd9a | 2406 | { |
c3f34952 | 2407 | gfc_component *this_comp = NULL; |
6de9cd9a | 2408 | |
c3f34952 TB |
2409 | if (!comp_head) |
2410 | comp_tail = comp_head = gfc_get_structure_ctor_component (); | |
2411 | else | |
2412 | { | |
2413 | comp_tail->next = gfc_get_structure_ctor_component (); | |
2414 | comp_tail = comp_tail->next; | |
2415 | } | |
2416 | if (actual->name) | |
2417 | { | |
2418 | if (gfc_notify_std (GFC_STD_F2003, "Fortran 2003: Structure" | |
2419 | " constructor with named arguments at %C") | |
2420 | == FAILURE) | |
2421 | goto cleanup; | |
6de9cd9a | 2422 | |
c3f34952 TB |
2423 | comp_tail->name = xstrdup (actual->name); |
2424 | last_name = comp_tail->name; | |
2425 | comp = NULL; | |
2426 | } | |
2427 | else | |
2428 | { | |
2429 | /* Components without name are not allowed after the first named | |
2430 | component initializer! */ | |
2431 | if (!comp) | |
fa9290d3 | 2432 | { |
c3f34952 TB |
2433 | if (last_name) |
2434 | gfc_error ("Component initializer without name after component" | |
2435 | " named %s at %L!", last_name, | |
2436 | actual->expr ? &actual->expr->where | |
2437 | : &gfc_current_locus); | |
2438 | else | |
2439 | gfc_error ("Too many components in structure constructor at " | |
2440 | "%L!", actual->expr ? &actual->expr->where | |
2441 | : &gfc_current_locus); | |
2442 | goto cleanup; | |
fa9290d3 | 2443 | } |
fa9290d3 | 2444 | |
c3f34952 TB |
2445 | comp_tail->name = xstrdup (comp->name); |
2446 | } | |
fa9290d3 | 2447 | |
c3f34952 | 2448 | /* Find the current component in the structure definition and check |
9d1210f4 | 2449 | its access is not private. */ |
c3f34952 TB |
2450 | if (comp) |
2451 | this_comp = gfc_find_component (sym, comp->name, false, false); | |
2452 | else | |
2453 | { | |
2454 | this_comp = gfc_find_component (sym, (const char *)comp_tail->name, | |
2455 | false, false); | |
2456 | comp = NULL; /* Reset needed! */ | |
2457 | } | |
6de9cd9a | 2458 | |
c3f34952 TB |
2459 | /* Here we can check if a component name is given which does not |
2460 | correspond to any component of the defined structure. */ | |
2461 | if (!this_comp) | |
2462 | goto cleanup; | |
fa9290d3 | 2463 | |
c3f34952 TB |
2464 | comp_tail->val = actual->expr; |
2465 | if (actual->expr != NULL) | |
2466 | comp_tail->where = actual->expr->where; | |
2467 | actual->expr = NULL; | |
fa9290d3 | 2468 | |
c3f34952 TB |
2469 | /* Check if this component is already given a value. */ |
2470 | for (comp_iter = comp_head; comp_iter != comp_tail; | |
2471 | comp_iter = comp_iter->next) | |
2472 | { | |
2473 | gcc_assert (comp_iter); | |
2474 | if (!strcmp (comp_iter->name, comp_tail->name)) | |
d3a9eea2 | 2475 | { |
c3f34952 TB |
2476 | gfc_error ("Component '%s' is initialized twice in the structure" |
2477 | " constructor at %L!", comp_tail->name, | |
2478 | comp_tail->val ? &comp_tail->where | |
2479 | : &gfc_current_locus); | |
d3a9eea2 | 2480 | goto cleanup; |
c3f34952 TB |
2481 | } |
2482 | } | |
d3a9eea2 | 2483 | |
c3f34952 TB |
2484 | /* F2008, R457/C725, for PURE C1283. */ |
2485 | if (this_comp->attr.pointer && comp_tail->val | |
2486 | && gfc_is_coindexed (comp_tail->val)) | |
2487 | { | |
2488 | gfc_error ("Coindexed expression to pointer component '%s' in " | |
2489 | "structure constructor at %L!", comp_tail->name, | |
2490 | &comp_tail->where); | |
2491 | goto cleanup; | |
2492 | } | |
d3a9eea2 | 2493 | |
c3f34952 TB |
2494 | /* If not explicitly a parent constructor, gather up the components |
2495 | and build one. */ | |
2496 | if (comp && comp == sym->components | |
2497 | && sym->attr.extension | |
2498 | && comp_tail->val | |
2499 | && (comp_tail->val->ts.type != BT_DERIVED | |
2500 | || | |
2501 | comp_tail->val->ts.u.derived != this_comp->ts.u.derived)) | |
2502 | { | |
2503 | gfc_try m; | |
2504 | gfc_actual_arglist *arg_null = NULL; | |
6de9cd9a | 2505 | |
c3f34952 TB |
2506 | actual->expr = comp_tail->val; |
2507 | comp_tail->val = NULL; | |
6de9cd9a | 2508 | |
c3f34952 TB |
2509 | m = gfc_convert_to_structure_constructor (NULL, |
2510 | comp->ts.u.derived, &comp_tail->val, | |
2511 | comp->ts.u.derived->attr.zero_comp | |
2512 | ? &arg_null : &actual, true); | |
2513 | if (m == FAILURE) | |
2514 | goto cleanup; | |
2eae3dc7 | 2515 | |
c3f34952 TB |
2516 | if (comp->ts.u.derived->attr.zero_comp) |
2517 | { | |
2518 | comp = comp->next; | |
2519 | continue; | |
2520 | } | |
2521 | } | |
fa9290d3 | 2522 | |
c3f34952 TB |
2523 | if (comp) |
2524 | comp = comp->next; | |
2525 | if (parent && !comp) | |
2526 | break; | |
fa9290d3 | 2527 | |
c3f34952 | 2528 | actual = actual->next; |
6de9cd9a DN |
2529 | } |
2530 | ||
7d1f1e61 PT |
2531 | if (build_actual_constructor (&comp_head, &ctor_head, sym) == FAILURE) |
2532 | goto cleanup; | |
2533 | ||
fa9290d3 DK |
2534 | /* No component should be left, as this should have caused an error in the |
2535 | loop constructing the component-list (name that does not correspond to any | |
2536 | component in the structure definition). */ | |
c3f34952 | 2537 | if (comp_head && sym->attr.extension) |
7d1f1e61 PT |
2538 | { |
2539 | for (comp_iter = comp_head; comp_iter; comp_iter = comp_iter->next) | |
2540 | { | |
2541 | gfc_error ("component '%s' at %L has already been set by a " | |
2542 | "parent derived type constructor", comp_iter->name, | |
2543 | &comp_iter->where); | |
2544 | } | |
2545 | goto cleanup; | |
2546 | } | |
c3f34952 TB |
2547 | else |
2548 | gcc_assert (!comp_head); | |
fa9290d3 | 2549 | |
c3f34952 TB |
2550 | if (parent) |
2551 | { | |
2552 | expr = gfc_get_structure_constructor_expr (BT_DERIVED, 0, &gfc_current_locus); | |
2553 | expr->ts.u.derived = sym; | |
2554 | expr->value.constructor = ctor_head; | |
2555 | *cexpr = expr; | |
2556 | } | |
2557 | else | |
2558 | { | |
2559 | expr->ts.u.derived = sym; | |
2560 | expr->ts.kind = 0; | |
2561 | expr->ts.type = BT_DERIVED; | |
2562 | expr->value.constructor = ctor_head; | |
2563 | expr->expr_type = EXPR_STRUCTURE; | |
2564 | } | |
6de9cd9a | 2565 | |
c3f34952 TB |
2566 | gfc_current_locus = old_locus; |
2567 | if (parent) | |
2568 | *arglist = actual; | |
2569 | return SUCCESS; | |
6de9cd9a | 2570 | |
c3f34952 TB |
2571 | cleanup: |
2572 | gfc_current_locus = old_locus; | |
6de9cd9a | 2573 | |
fa9290d3 DK |
2574 | for (comp_iter = comp_head; comp_iter; ) |
2575 | { | |
2576 | gfc_structure_ctor_component *next = comp_iter->next; | |
2577 | gfc_free_structure_ctor_component (comp_iter); | |
2578 | comp_iter = next; | |
2579 | } | |
b7e75771 | 2580 | gfc_constructor_free (ctor_head); |
c3f34952 TB |
2581 | |
2582 | return FAILURE; | |
2583 | } | |
2584 | ||
2585 | ||
2586 | match | |
2587 | gfc_match_structure_constructor (gfc_symbol *sym, gfc_expr **result) | |
2588 | { | |
2589 | match m; | |
2590 | gfc_expr *e; | |
2591 | gfc_symtree *symtree; | |
2592 | ||
2593 | gfc_get_sym_tree (sym->name, NULL, &symtree, false); /* Can't fail */ | |
2594 | ||
2595 | e = gfc_get_expr (); | |
2596 | e->symtree = symtree; | |
2597 | e->expr_type = EXPR_FUNCTION; | |
2598 | ||
2599 | gcc_assert (sym->attr.flavor == FL_DERIVED | |
2600 | && symtree->n.sym->attr.flavor == FL_PROCEDURE); | |
2601 | e->value.function.esym = sym; | |
2602 | e->symtree->n.sym->attr.generic = 1; | |
2603 | ||
2604 | m = gfc_match_actual_arglist (0, &e->value.function.actual); | |
2605 | if (m != MATCH_YES) | |
2606 | { | |
2607 | gfc_free_expr (e); | |
2608 | return m; | |
2609 | } | |
2610 | ||
2611 | if (gfc_convert_to_structure_constructor (e, sym, NULL, NULL, false) | |
2612 | != SUCCESS) | |
2613 | { | |
2614 | gfc_free_expr (e); | |
2615 | return MATCH_ERROR; | |
2616 | } | |
2617 | ||
2618 | *result = e; | |
2619 | return MATCH_YES; | |
6de9cd9a DN |
2620 | } |
2621 | ||
2622 | ||
9a3db5a3 PT |
2623 | /* If the symbol is an implicit do loop index and implicitly typed, |
2624 | it should not be host associated. Provide a symtree from the | |
2625 | current namespace. */ | |
2626 | static match | |
2627 | check_for_implicit_index (gfc_symtree **st, gfc_symbol **sym) | |
2628 | { | |
2629 | if ((*sym)->attr.flavor == FL_VARIABLE | |
2630 | && (*sym)->ns != gfc_current_ns | |
2631 | && (*sym)->attr.implied_index | |
2632 | && (*sym)->attr.implicit_type | |
2633 | && !(*sym)->attr.use_assoc) | |
2634 | { | |
2635 | int i; | |
08a6b8e0 | 2636 | i = gfc_get_sym_tree ((*sym)->name, NULL, st, false); |
9a3db5a3 PT |
2637 | if (i) |
2638 | return MATCH_ERROR; | |
2639 | *sym = (*st)->n.sym; | |
2640 | } | |
2641 | return MATCH_YES; | |
2642 | } | |
2643 | ||
2644 | ||
3070bab4 JW |
2645 | /* Procedure pointer as function result: Replace the function symbol by the |
2646 | auto-generated hidden result variable named "ppr@". */ | |
2647 | ||
2648 | static gfc_try | |
2649 | replace_hidden_procptr_result (gfc_symbol **sym, gfc_symtree **st) | |
2650 | { | |
2651 | /* Check for procedure pointer result variable. */ | |
2652 | if ((*sym)->attr.function && !(*sym)->attr.external | |
2653 | && (*sym)->result && (*sym)->result != *sym | |
2654 | && (*sym)->result->attr.proc_pointer | |
2655 | && (*sym) == gfc_current_ns->proc_name | |
2656 | && (*sym) == (*sym)->result->ns->proc_name | |
2657 | && strcmp ("ppr@", (*sym)->result->name) == 0) | |
2658 | { | |
2659 | /* Automatic replacement with "hidden" result variable. */ | |
2660 | (*sym)->result->attr.referenced = (*sym)->attr.referenced; | |
2661 | *sym = (*sym)->result; | |
2662 | *st = gfc_find_symtree ((*sym)->ns->sym_root, (*sym)->name); | |
2663 | return SUCCESS; | |
2664 | } | |
2665 | return FAILURE; | |
2666 | } | |
2667 | ||
2668 | ||
6de9cd9a DN |
2669 | /* Matches a variable name followed by anything that might follow it-- |
2670 | array reference, argument list of a function, etc. */ | |
2671 | ||
2672 | match | |
edf1eac2 | 2673 | gfc_match_rvalue (gfc_expr **result) |
6de9cd9a DN |
2674 | { |
2675 | gfc_actual_arglist *actual_arglist; | |
d3fcc995 | 2676 | char name[GFC_MAX_SYMBOL_LEN + 1], argname[GFC_MAX_SYMBOL_LEN + 1]; |
6de9cd9a DN |
2677 | gfc_state_data *st; |
2678 | gfc_symbol *sym; | |
2679 | gfc_symtree *symtree; | |
d3fcc995 | 2680 | locus where, old_loc; |
6de9cd9a | 2681 | gfc_expr *e; |
d3fcc995 | 2682 | match m, m2; |
6de9cd9a | 2683 | int i; |
5270c302 AL |
2684 | gfc_typespec *ts; |
2685 | bool implicit_char; | |
a99288e5 | 2686 | gfc_ref *ref; |
6de9cd9a DN |
2687 | |
2688 | m = gfc_match_name (name); | |
2689 | if (m != MATCH_YES) | |
2690 | return m; | |
2691 | ||
2a6dcee5 TB |
2692 | if (gfc_find_state (COMP_INTERFACE) == SUCCESS |
2693 | && !gfc_current_ns->has_import_set) | |
08a6b8e0 | 2694 | i = gfc_get_sym_tree (name, NULL, &symtree, false); |
6de9cd9a DN |
2695 | else |
2696 | i = gfc_get_ha_sym_tree (name, &symtree); | |
2697 | ||
2698 | if (i) | |
2699 | return MATCH_ERROR; | |
2700 | ||
2701 | sym = symtree->n.sym; | |
2702 | e = NULL; | |
63645982 | 2703 | where = gfc_current_locus; |
6de9cd9a | 2704 | |
3070bab4 JW |
2705 | replace_hidden_procptr_result (&sym, &symtree); |
2706 | ||
9a3db5a3 PT |
2707 | /* If this is an implicit do loop index and implicitly typed, |
2708 | it should not be host associated. */ | |
2709 | m = check_for_implicit_index (&symtree, &sym); | |
2710 | if (m != MATCH_YES) | |
2711 | return m; | |
2712 | ||
6de9cd9a | 2713 | gfc_set_sym_referenced (sym); |
9a3db5a3 | 2714 | sym->attr.implied_index = 0; |
6de9cd9a | 2715 | |
0921bc44 JJ |
2716 | if (sym->attr.function && sym->result == sym) |
2717 | { | |
811849c0 PT |
2718 | /* See if this is a directly recursive function call. */ |
2719 | gfc_gobble_whitespace (); | |
2720 | if (sym->attr.recursive | |
8fc541d3 | 2721 | && gfc_peek_ascii_char () == '(' |
fc2d8680 PT |
2722 | && gfc_current_ns->proc_name == sym |
2723 | && !sym->attr.dimension) | |
811849c0 | 2724 | { |
fc2d8680 PT |
2725 | gfc_error ("'%s' at %C is the name of a recursive function " |
2726 | "and so refers to the result variable. Use an " | |
2727 | "explicit RESULT variable for direct recursion " | |
2728 | "(12.5.2.1)", sym->name); | |
811849c0 PT |
2729 | return MATCH_ERROR; |
2730 | } | |
fc2d8680 | 2731 | |
2d71b918 | 2732 | if (gfc_is_function_return_value (sym, gfc_current_ns)) |
0921bc44 JJ |
2733 | goto variable; |
2734 | ||
2735 | if (sym->attr.entry | |
2736 | && (sym->ns == gfc_current_ns | |
2737 | || sym->ns == gfc_current_ns->parent)) | |
2738 | { | |
2739 | gfc_entry_list *el = NULL; | |
2740 | ||
2741 | for (el = sym->ns->entries; el; el = el->next) | |
2742 | if (sym == el->sym) | |
2743 | goto variable; | |
2744 | } | |
2745 | } | |
6de9cd9a | 2746 | |
8fb74da4 JW |
2747 | if (gfc_matching_procptr_assignment) |
2748 | goto procptr0; | |
2749 | ||
6de9cd9a DN |
2750 | if (sym->attr.function || sym->attr.external || sym->attr.intrinsic) |
2751 | goto function0; | |
2752 | ||
2753 | if (sym->attr.generic) | |
2754 | goto generic_function; | |
2755 | ||
2756 | switch (sym->attr.flavor) | |
2757 | { | |
2758 | case FL_VARIABLE: | |
2759 | variable: | |
6de9cd9a DN |
2760 | e = gfc_get_expr (); |
2761 | ||
2762 | e->expr_type = EXPR_VARIABLE; | |
2763 | e->symtree = symtree; | |
2764 | ||
713485cc | 2765 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
2766 | break; |
2767 | ||
2768 | case FL_PARAMETER: | |
b7263e8f EE |
2769 | /* A statement of the form "REAL, parameter :: a(0:10) = 1" will |
2770 | end up here. Unfortunately, sym->value->expr_type is set to | |
2771 | EXPR_CONSTANT, and so the if () branch would be followed without | |
2772 | the !sym->as check. */ | |
2773 | if (sym->value && sym->value->expr_type != EXPR_ARRAY && !sym->as) | |
6de9cd9a DN |
2774 | e = gfc_copy_expr (sym->value); |
2775 | else | |
2776 | { | |
2777 | e = gfc_get_expr (); | |
2778 | e->expr_type = EXPR_VARIABLE; | |
2779 | } | |
2780 | ||
2781 | e->symtree = symtree; | |
713485cc | 2782 | m = gfc_match_varspec (e, 0, false, true); |
a99288e5 PT |
2783 | |
2784 | if (sym->ts.is_c_interop || sym->ts.is_iso_c) | |
2785 | break; | |
2786 | ||
927171bf PT |
2787 | /* Variable array references to derived type parameters cause |
2788 | all sorts of headaches in simplification. Treating such | |
2789 | expressions as variable works just fine for all array | |
2790 | references. */ | |
2791 | if (sym->value && sym->ts.type == BT_DERIVED && e->ref) | |
a99288e5 PT |
2792 | { |
2793 | for (ref = e->ref; ref; ref = ref->next) | |
2794 | if (ref->type == REF_ARRAY) | |
2795 | break; | |
2796 | ||
927171bf | 2797 | if (ref == NULL || ref->u.ar.type == AR_FULL) |
a99288e5 PT |
2798 | break; |
2799 | ||
2800 | ref = e->ref; | |
2801 | e->ref = NULL; | |
2802 | gfc_free_expr (e); | |
2803 | e = gfc_get_expr (); | |
2804 | e->expr_type = EXPR_VARIABLE; | |
2805 | e->symtree = symtree; | |
2806 | e->ref = ref; | |
a99288e5 PT |
2807 | } |
2808 | ||
6de9cd9a DN |
2809 | break; |
2810 | ||
2811 | case FL_DERIVED: | |
2812 | sym = gfc_use_derived (sym); | |
2813 | if (sym == NULL) | |
2814 | m = MATCH_ERROR; | |
2815 | else | |
c3f34952 | 2816 | goto generic_function; |
6de9cd9a DN |
2817 | break; |
2818 | ||
2819 | /* If we're here, then the name is known to be the name of a | |
2820 | procedure, yet it is not sure to be the name of a function. */ | |
2821 | case FL_PROCEDURE: | |
8fb74da4 JW |
2822 | |
2823 | /* Procedure Pointer Assignments. */ | |
2824 | procptr0: | |
2825 | if (gfc_matching_procptr_assignment) | |
2826 | { | |
2827 | gfc_gobble_whitespace (); | |
e35bbb23 | 2828 | if (!sym->attr.dimension && gfc_peek_ascii_char () == '(') |
8fb74da4 JW |
2829 | /* Parse functions returning a procptr. */ |
2830 | goto function0; | |
2831 | ||
c3005b0f DK |
2832 | if (gfc_is_intrinsic (sym, 0, gfc_current_locus) |
2833 | || gfc_is_intrinsic (sym, 1, gfc_current_locus)) | |
8fb74da4 JW |
2834 | sym->attr.intrinsic = 1; |
2835 | e = gfc_get_expr (); | |
2836 | e->expr_type = EXPR_VARIABLE; | |
2837 | e->symtree = symtree; | |
713485cc | 2838 | m = gfc_match_varspec (e, 0, false, true); |
8fb74da4 JW |
2839 | break; |
2840 | } | |
2841 | ||
6de9cd9a DN |
2842 | if (sym->attr.subroutine) |
2843 | { | |
2844 | gfc_error ("Unexpected use of subroutine name '%s' at %C", | |
2845 | sym->name); | |
2846 | m = MATCH_ERROR; | |
2847 | break; | |
2848 | } | |
2849 | ||
2850 | /* At this point, the name has to be a non-statement function. | |
edf1eac2 SK |
2851 | If the name is the same as the current function being |
2852 | compiled, then we have a variable reference (to the function | |
2853 | result) if the name is non-recursive. */ | |
6de9cd9a DN |
2854 | |
2855 | st = gfc_enclosing_unit (NULL); | |
2856 | ||
2857 | if (st != NULL && st->state == COMP_FUNCTION | |
2858 | && st->sym == sym | |
2859 | && !sym->attr.recursive) | |
2860 | { | |
2861 | e = gfc_get_expr (); | |
2862 | e->symtree = symtree; | |
2863 | e->expr_type = EXPR_VARIABLE; | |
2864 | ||
713485cc | 2865 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
2866 | break; |
2867 | } | |
2868 | ||
2869 | /* Match a function reference. */ | |
2870 | function0: | |
2871 | m = gfc_match_actual_arglist (0, &actual_arglist); | |
2872 | if (m == MATCH_NO) | |
2873 | { | |
2874 | if (sym->attr.proc == PROC_ST_FUNCTION) | |
2875 | gfc_error ("Statement function '%s' requires argument list at %C", | |
2876 | sym->name); | |
2877 | else | |
2878 | gfc_error ("Function '%s' requires an argument list at %C", | |
2879 | sym->name); | |
2880 | ||
2881 | m = MATCH_ERROR; | |
2882 | break; | |
2883 | } | |
2884 | ||
2885 | if (m != MATCH_YES) | |
2886 | { | |
2887 | m = MATCH_ERROR; | |
2888 | break; | |
2889 | } | |
2890 | ||
2891 | gfc_get_ha_sym_tree (name, &symtree); /* Can't fail */ | |
2892 | sym = symtree->n.sym; | |
2893 | ||
3070bab4 JW |
2894 | replace_hidden_procptr_result (&sym, &symtree); |
2895 | ||
6de9cd9a DN |
2896 | e = gfc_get_expr (); |
2897 | e->symtree = symtree; | |
2898 | e->expr_type = EXPR_FUNCTION; | |
2899 | e->value.function.actual = actual_arglist; | |
63645982 | 2900 | e->where = gfc_current_locus; |
6de9cd9a | 2901 | |
102344e2 TB |
2902 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok |
2903 | && CLASS_DATA (sym)->as) | |
2904 | e->rank = CLASS_DATA (sym)->as->rank; | |
2905 | else if (sym->as != NULL) | |
6de9cd9a DN |
2906 | e->rank = sym->as->rank; |
2907 | ||
2908 | if (!sym->attr.function | |
231b2fcc | 2909 | && gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
2910 | { |
2911 | m = MATCH_ERROR; | |
2912 | break; | |
2913 | } | |
2914 | ||
a8b3b0b6 CR |
2915 | /* Check here for the existence of at least one argument for the |
2916 | iso_c_binding functions C_LOC, C_FUNLOC, and C_ASSOCIATED. The | |
2917 | argument(s) given will be checked in gfc_iso_c_func_interface, | |
2918 | during resolution of the function call. */ | |
2919 | if (sym->attr.is_iso_c == 1 | |
2920 | && (sym->from_intmod == INTMOD_ISO_C_BINDING | |
2921 | && (sym->intmod_sym_id == ISOCBINDING_LOC | |
2922 | || sym->intmod_sym_id == ISOCBINDING_FUNLOC | |
2923 | || sym->intmod_sym_id == ISOCBINDING_ASSOCIATED))) | |
2924 | { | |
2925 | /* make sure we were given a param */ | |
2926 | if (actual_arglist == NULL) | |
2927 | { | |
2928 | gfc_error ("Missing argument to '%s' at %C", sym->name); | |
2929 | m = MATCH_ERROR; | |
2930 | break; | |
2931 | } | |
2932 | } | |
2933 | ||
6de9cd9a DN |
2934 | if (sym->result == NULL) |
2935 | sym->result = sym; | |
2936 | ||
2937 | m = MATCH_YES; | |
2938 | break; | |
2939 | ||
2940 | case FL_UNKNOWN: | |
2941 | ||
2942 | /* Special case for derived type variables that get their types | |
edf1eac2 SK |
2943 | via an IMPLICIT statement. This can't wait for the |
2944 | resolution phase. */ | |
6de9cd9a | 2945 | |
8fc541d3 | 2946 | if (gfc_peek_ascii_char () == '%' |
0dd973dd | 2947 | && sym->ts.type == BT_UNKNOWN |
713485cc | 2948 | && gfc_get_default_type (sym->name, sym->ns)->type == BT_DERIVED) |
6de9cd9a DN |
2949 | gfc_set_default_type (sym, 0, sym->ns); |
2950 | ||
492792ed | 2951 | /* If the symbol has a (co)dimension attribute, the expression is a |
edf1eac2 | 2952 | variable. */ |
6de9cd9a | 2953 | |
492792ed | 2954 | if (sym->attr.dimension || sym->attr.codimension) |
6de9cd9a | 2955 | { |
231b2fcc TS |
2956 | if (gfc_add_flavor (&sym->attr, FL_VARIABLE, |
2957 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
2958 | { |
2959 | m = MATCH_ERROR; | |
2960 | break; | |
2961 | } | |
2962 | ||
2963 | e = gfc_get_expr (); | |
2964 | e->symtree = symtree; | |
2965 | e->expr_type = EXPR_VARIABLE; | |
713485cc | 2966 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
2967 | break; |
2968 | } | |
2969 | ||
cd99c23c | 2970 | if (sym->ts.type == BT_CLASS && sym->attr.class_ok |
492792ed TB |
2971 | && (CLASS_DATA (sym)->attr.dimension |
2972 | || CLASS_DATA (sym)->attr.codimension)) | |
c49ea23d PT |
2973 | { |
2974 | if (gfc_add_flavor (&sym->attr, FL_VARIABLE, | |
2975 | sym->name, NULL) == FAILURE) | |
2976 | { | |
2977 | m = MATCH_ERROR; | |
2978 | break; | |
2979 | } | |
2980 | ||
2981 | e = gfc_get_expr (); | |
2982 | e->symtree = symtree; | |
2983 | e->expr_type = EXPR_VARIABLE; | |
2984 | m = gfc_match_varspec (e, 0, false, true); | |
2985 | break; | |
2986 | } | |
2987 | ||
6de9cd9a | 2988 | /* Name is not an array, so we peek to see if a '(' implies a |
edf1eac2 SK |
2989 | function call or a substring reference. Otherwise the |
2990 | variable is just a scalar. */ | |
6de9cd9a DN |
2991 | |
2992 | gfc_gobble_whitespace (); | |
8fc541d3 | 2993 | if (gfc_peek_ascii_char () != '(') |
6de9cd9a DN |
2994 | { |
2995 | /* Assume a scalar variable */ | |
2996 | e = gfc_get_expr (); | |
2997 | e->symtree = symtree; | |
2998 | e->expr_type = EXPR_VARIABLE; | |
2999 | ||
231b2fcc TS |
3000 | if (gfc_add_flavor (&sym->attr, FL_VARIABLE, |
3001 | sym->name, NULL) == FAILURE) | |
6de9cd9a DN |
3002 | { |
3003 | m = MATCH_ERROR; | |
3004 | break; | |
3005 | } | |
3006 | ||
8e1f752a | 3007 | /*FIXME:??? gfc_match_varspec does set this for us: */ |
6de9cd9a | 3008 | e->ts = sym->ts; |
713485cc | 3009 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3010 | break; |
3011 | } | |
3012 | ||
d3fcc995 TS |
3013 | /* See if this is a function reference with a keyword argument |
3014 | as first argument. We do this because otherwise a spurious | |
3015 | symbol would end up in the symbol table. */ | |
3016 | ||
3017 | old_loc = gfc_current_locus; | |
3018 | m2 = gfc_match (" ( %n =", argname); | |
3019 | gfc_current_locus = old_loc; | |
6de9cd9a DN |
3020 | |
3021 | e = gfc_get_expr (); | |
3022 | e->symtree = symtree; | |
3023 | ||
d3fcc995 | 3024 | if (m2 != MATCH_YES) |
6de9cd9a | 3025 | { |
5270c302 AL |
3026 | /* Try to figure out whether we're dealing with a character type. |
3027 | We're peeking ahead here, because we don't want to call | |
3028 | match_substring if we're dealing with an implicitly typed | |
3029 | non-character variable. */ | |
3030 | implicit_char = false; | |
3031 | if (sym->ts.type == BT_UNKNOWN) | |
3032 | { | |
713485cc | 3033 | ts = gfc_get_default_type (sym->name, NULL); |
5270c302 AL |
3034 | if (ts->type == BT_CHARACTER) |
3035 | implicit_char = true; | |
3036 | } | |
3037 | ||
d3fcc995 TS |
3038 | /* See if this could possibly be a substring reference of a name |
3039 | that we're not sure is a variable yet. */ | |
6de9cd9a | 3040 | |
5270c302 | 3041 | if ((implicit_char || sym->ts.type == BT_CHARACTER) |
bc21d315 | 3042 | && match_substring (sym->ts.u.cl, 0, &e->ref) == MATCH_YES) |
6de9cd9a | 3043 | { |
6de9cd9a | 3044 | |
d3fcc995 TS |
3045 | e->expr_type = EXPR_VARIABLE; |
3046 | ||
3047 | if (sym->attr.flavor != FL_VARIABLE | |
231b2fcc TS |
3048 | && gfc_add_flavor (&sym->attr, FL_VARIABLE, |
3049 | sym->name, NULL) == FAILURE) | |
d3fcc995 TS |
3050 | { |
3051 | m = MATCH_ERROR; | |
3052 | break; | |
3053 | } | |
3054 | ||
3055 | if (sym->ts.type == BT_UNKNOWN | |
3056 | && gfc_set_default_type (sym, 1, NULL) == FAILURE) | |
3057 | { | |
3058 | m = MATCH_ERROR; | |
3059 | break; | |
3060 | } | |
3061 | ||
3062 | e->ts = sym->ts; | |
860c8f3b | 3063 | if (e->ref) |
bc21d315 | 3064 | e->ts.u.cl = NULL; |
d3fcc995 | 3065 | m = MATCH_YES; |
6de9cd9a DN |
3066 | break; |
3067 | } | |
6de9cd9a DN |
3068 | } |
3069 | ||
3070 | /* Give up, assume we have a function. */ | |
3071 | ||
08a6b8e0 | 3072 | gfc_get_sym_tree (name, NULL, &symtree, false); /* Can't fail */ |
6de9cd9a DN |
3073 | sym = symtree->n.sym; |
3074 | e->expr_type = EXPR_FUNCTION; | |
3075 | ||
3076 | if (!sym->attr.function | |
231b2fcc | 3077 | && gfc_add_function (&sym->attr, sym->name, NULL) == FAILURE) |
6de9cd9a DN |
3078 | { |
3079 | m = MATCH_ERROR; | |
3080 | break; | |
3081 | } | |
3082 | ||
3083 | sym->result = sym; | |
3084 | ||
3085 | m = gfc_match_actual_arglist (0, &e->value.function.actual); | |
3086 | if (m == MATCH_NO) | |
3087 | gfc_error ("Missing argument list in function '%s' at %C", sym->name); | |
3088 | ||
3089 | if (m != MATCH_YES) | |
3090 | { | |
3091 | m = MATCH_ERROR; | |
3092 | break; | |
3093 | } | |
3094 | ||
3095 | /* If our new function returns a character, array or structure | |
edf1eac2 | 3096 | type, it might have subsequent references. */ |
6de9cd9a | 3097 | |
713485cc | 3098 | m = gfc_match_varspec (e, 0, false, true); |
6de9cd9a DN |
3099 | if (m == MATCH_NO) |
3100 | m = MATCH_YES; | |
3101 | ||
3102 | break; | |
3103 | ||
3104 | generic_function: | |
08a6b8e0 | 3105 | gfc_get_sym_tree (name, NULL, &symtree, false); /* Can't fail */ |
6de9cd9a DN |
3106 | |
3107 | e = gfc_get_expr (); | |
3108 | e->symtree = symtree; | |
3109 | e->expr_type = EXPR_FUNCTION; | |
3110 | ||
c3f34952 TB |
3111 | if (sym->attr.flavor == FL_DERIVED) |
3112 | { | |
3113 | e->value.function.esym = sym; | |
3114 | e->symtree->n.sym->attr.generic = 1; | |
3115 | } | |
3116 | ||
6de9cd9a DN |
3117 | m = gfc_match_actual_arglist (0, &e->value.function.actual); |
3118 | break; | |
3119 | ||
3120 | default: | |
3121 | gfc_error ("Symbol at %C is not appropriate for an expression"); | |
3122 | return MATCH_ERROR; | |
3123 | } | |
3124 | ||
3125 | if (m == MATCH_YES) | |
3126 | { | |
3127 | e->where = where; | |
3128 | *result = e; | |
3129 | } | |
3130 | else | |
3131 | gfc_free_expr (e); | |
3132 | ||
3133 | return m; | |
3134 | } | |
3135 | ||
3136 | ||
df2fba9e | 3137 | /* Match a variable, i.e. something that can be assigned to. This |
6de9cd9a DN |
3138 | starts as a symbol, can be a structure component or an array |
3139 | reference. It can be a function if the function doesn't have a | |
3140 | separate RESULT variable. If the symbol has not been previously | |
30aabb86 | 3141 | seen, we assume it is a variable. |
6de9cd9a | 3142 | |
30aabb86 PT |
3143 | This function is called by two interface functions: |
3144 | gfc_match_variable, which has host_flag = 1, and | |
3145 | gfc_match_equiv_variable, with host_flag = 0, to restrict the | |
3146 | match of the symbol to the local scope. */ | |
3147 | ||
3148 | static match | |
edf1eac2 | 3149 | match_variable (gfc_expr **result, int equiv_flag, int host_flag) |
6de9cd9a DN |
3150 | { |
3151 | gfc_symbol *sym; | |
3152 | gfc_symtree *st; | |
3153 | gfc_expr *expr; | |
3154 | locus where; | |
3155 | match m; | |
3156 | ||
fd2aa7ad PT |
3157 | /* Since nothing has any business being an lvalue in a module |
3158 | specification block, an interface block or a contains section, | |
3159 | we force the changed_symbols mechanism to work by setting | |
3160 | host_flag to 0. This prevents valid symbols that have the name | |
3161 | of keywords, such as 'end', being turned into variables by | |
df2fba9e | 3162 | failed matching to assignments for, e.g., END INTERFACE. */ |
fd2aa7ad PT |
3163 | if (gfc_current_state () == COMP_MODULE |
3164 | || gfc_current_state () == COMP_INTERFACE | |
3165 | || gfc_current_state () == COMP_CONTAINS) | |
3166 | host_flag = 0; | |
3167 | ||
618f4f46 | 3168 | where = gfc_current_locus; |
30aabb86 | 3169 | m = gfc_match_sym_tree (&st, host_flag); |
6de9cd9a DN |
3170 | if (m != MATCH_YES) |
3171 | return m; | |
6de9cd9a DN |
3172 | |
3173 | sym = st->n.sym; | |
9a3db5a3 PT |
3174 | |
3175 | /* If this is an implicit do loop index and implicitly typed, | |
3176 | it should not be host associated. */ | |
3177 | m = check_for_implicit_index (&st, &sym); | |
3178 | if (m != MATCH_YES) | |
3179 | return m; | |
3180 | ||
3181 | sym->attr.implied_index = 0; | |
3182 | ||
6de9cd9a DN |
3183 | gfc_set_sym_referenced (sym); |
3184 | switch (sym->attr.flavor) | |
3185 | { | |
3186 | case FL_VARIABLE: | |
8c91ab34 | 3187 | /* Everything is alright. */ |
6de9cd9a DN |
3188 | break; |
3189 | ||
3190 | case FL_UNKNOWN: | |
d7e2fcd0 TB |
3191 | { |
3192 | sym_flavor flavor = FL_UNKNOWN; | |
3193 | ||
3194 | gfc_gobble_whitespace (); | |
3195 | ||
3196 | if (sym->attr.external || sym->attr.procedure | |
3197 | || sym->attr.function || sym->attr.subroutine) | |
3198 | flavor = FL_PROCEDURE; | |
b9332b09 PT |
3199 | |
3200 | /* If it is not a procedure, is not typed and is host associated, | |
3201 | we cannot give it a flavor yet. */ | |
3202 | else if (sym->ns == gfc_current_ns->parent | |
3203 | && sym->ts.type == BT_UNKNOWN) | |
3204 | break; | |
3205 | ||
3206 | /* These are definitive indicators that this is a variable. */ | |
8fc541d3 | 3207 | else if (gfc_peek_ascii_char () != '(' || sym->ts.type != BT_UNKNOWN |
d7e2fcd0 TB |
3208 | || sym->attr.pointer || sym->as != NULL) |
3209 | flavor = FL_VARIABLE; | |
3210 | ||
3211 | if (flavor != FL_UNKNOWN | |
3212 | && gfc_add_flavor (&sym->attr, flavor, sym->name, NULL) == FAILURE) | |
3213 | return MATCH_ERROR; | |
3214 | } | |
6de9cd9a DN |
3215 | break; |
3216 | ||
5056a350 SK |
3217 | case FL_PARAMETER: |
3218 | if (equiv_flag) | |
8c91ab34 DK |
3219 | { |
3220 | gfc_error ("Named constant at %C in an EQUIVALENCE"); | |
3221 | return MATCH_ERROR; | |
3222 | } | |
3223 | /* Otherwise this is checked for and an error given in the | |
3224 | variable definition context checks. */ | |
5056a350 SK |
3225 | break; |
3226 | ||
6de9cd9a | 3227 | case FL_PROCEDURE: |
01d2a7d7 DF |
3228 | /* Check for a nonrecursive function result variable. */ |
3229 | if (sym->attr.function | |
8c91ab34 DK |
3230 | && !sym->attr.external |
3231 | && sym->result == sym | |
3232 | && (gfc_is_function_return_value (sym, gfc_current_ns) | |
3233 | || (sym->attr.entry | |
3234 | && sym->ns == gfc_current_ns) | |
3235 | || (sym->attr.entry | |
3236 | && sym->ns == gfc_current_ns->parent))) | |
6de9cd9a | 3237 | { |
6de9cd9a DN |
3238 | /* If a function result is a derived type, then the derived |
3239 | type may still have to be resolved. */ | |
3240 | ||
3241 | if (sym->ts.type == BT_DERIVED | |
bc21d315 | 3242 | && gfc_use_derived (sym->ts.u.derived) == NULL) |
6de9cd9a | 3243 | return MATCH_ERROR; |
6de9cd9a DN |
3244 | break; |
3245 | } | |
3246 | ||
3070bab4 JW |
3247 | if (sym->attr.proc_pointer |
3248 | || replace_hidden_procptr_result (&sym, &st) == SUCCESS) | |
8fb74da4 JW |
3249 | break; |
3250 | ||
6de9cd9a DN |
3251 | /* Fall through to error */ |
3252 | ||
3253 | default: | |
d7e2fcd0 | 3254 | gfc_error ("'%s' at %C is not a variable", sym->name); |
6de9cd9a DN |
3255 | return MATCH_ERROR; |
3256 | } | |
3257 | ||
0dd973dd PB |
3258 | /* Special case for derived type variables that get their types |
3259 | via an IMPLICIT statement. This can't wait for the | |
3260 | resolution phase. */ | |
3261 | ||
3262 | { | |
3263 | gfc_namespace * implicit_ns; | |
3264 | ||
3265 | if (gfc_current_ns->proc_name == sym) | |
3266 | implicit_ns = gfc_current_ns; | |
3267 | else | |
3268 | implicit_ns = sym->ns; | |
3269 | ||
8fc541d3 | 3270 | if (gfc_peek_ascii_char () == '%' |
0dd973dd | 3271 | && sym->ts.type == BT_UNKNOWN |
713485cc | 3272 | && gfc_get_default_type (sym->name, implicit_ns)->type == BT_DERIVED) |
0dd973dd PB |
3273 | gfc_set_default_type (sym, 0, implicit_ns); |
3274 | } | |
3275 | ||
6de9cd9a DN |
3276 | expr = gfc_get_expr (); |
3277 | ||
3278 | expr->expr_type = EXPR_VARIABLE; | |
3279 | expr->symtree = st; | |
3280 | expr->ts = sym->ts; | |
3281 | expr->where = where; | |
3282 | ||
3283 | /* Now see if we have to do more. */ | |
713485cc | 3284 | m = gfc_match_varspec (expr, equiv_flag, false, false); |
6de9cd9a DN |
3285 | if (m != MATCH_YES) |
3286 | { | |
3287 | gfc_free_expr (expr); | |
3288 | return m; | |
3289 | } | |
3290 | ||
3291 | *result = expr; | |
3292 | return MATCH_YES; | |
3293 | } | |
30aabb86 | 3294 | |
edf1eac2 | 3295 | |
30aabb86 | 3296 | match |
edf1eac2 | 3297 | gfc_match_variable (gfc_expr **result, int equiv_flag) |
30aabb86 PT |
3298 | { |
3299 | return match_variable (result, equiv_flag, 1); | |
3300 | } | |
3301 | ||
edf1eac2 | 3302 | |
30aabb86 | 3303 | match |
edf1eac2 | 3304 | gfc_match_equiv_variable (gfc_expr **result) |
30aabb86 PT |
3305 | { |
3306 | return match_variable (result, 1, 0); | |
3307 | } | |
3308 |