Mercurial > hg > CbC > CbC_gcc
comparison gcc/fortran/interface.c @ 111:04ced10e8804
gcc 7
author | kono |
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date | Fri, 27 Oct 2017 22:46:09 +0900 |
parents | |
children | 84e7813d76e9 |
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68:561a7518be6b | 111:04ced10e8804 |
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1 /* Deal with interfaces. | |
2 Copyright (C) 2000-2017 Free Software Foundation, Inc. | |
3 Contributed by Andy Vaught | |
4 | |
5 This file is part of GCC. | |
6 | |
7 GCC is free software; you can redistribute it and/or modify it under | |
8 the terms of the GNU General Public License as published by the Free | |
9 Software Foundation; either version 3, or (at your option) any later | |
10 version. | |
11 | |
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 for more details. | |
16 | |
17 You should have received a copy of the GNU General Public License | |
18 along with GCC; see the file COPYING3. If not see | |
19 <http://www.gnu.org/licenses/>. */ | |
20 | |
21 | |
22 /* Deal with interfaces. An explicit interface is represented as a | |
23 singly linked list of formal argument structures attached to the | |
24 relevant symbols. For an implicit interface, the arguments don't | |
25 point to symbols. Explicit interfaces point to namespaces that | |
26 contain the symbols within that interface. | |
27 | |
28 Implicit interfaces are linked together in a singly linked list | |
29 along the next_if member of symbol nodes. Since a particular | |
30 symbol can only have a single explicit interface, the symbol cannot | |
31 be part of multiple lists and a single next-member suffices. | |
32 | |
33 This is not the case for general classes, though. An operator | |
34 definition is independent of just about all other uses and has it's | |
35 own head pointer. | |
36 | |
37 Nameless interfaces: | |
38 Nameless interfaces create symbols with explicit interfaces within | |
39 the current namespace. They are otherwise unlinked. | |
40 | |
41 Generic interfaces: | |
42 The generic name points to a linked list of symbols. Each symbol | |
43 has an explicit interface. Each explicit interface has its own | |
44 namespace containing the arguments. Module procedures are symbols in | |
45 which the interface is added later when the module procedure is parsed. | |
46 | |
47 User operators: | |
48 User-defined operators are stored in a their own set of symtrees | |
49 separate from regular symbols. The symtrees point to gfc_user_op | |
50 structures which in turn head up a list of relevant interfaces. | |
51 | |
52 Extended intrinsics and assignment: | |
53 The head of these interface lists are stored in the containing namespace. | |
54 | |
55 Implicit interfaces: | |
56 An implicit interface is represented as a singly linked list of | |
57 formal argument list structures that don't point to any symbol | |
58 nodes -- they just contain types. | |
59 | |
60 | |
61 When a subprogram is defined, the program unit's name points to an | |
62 interface as usual, but the link to the namespace is NULL and the | |
63 formal argument list points to symbols within the same namespace as | |
64 the program unit name. */ | |
65 | |
66 #include "config.h" | |
67 #include "system.h" | |
68 #include "coretypes.h" | |
69 #include "options.h" | |
70 #include "gfortran.h" | |
71 #include "match.h" | |
72 #include "arith.h" | |
73 | |
74 /* The current_interface structure holds information about the | |
75 interface currently being parsed. This structure is saved and | |
76 restored during recursive interfaces. */ | |
77 | |
78 gfc_interface_info current_interface; | |
79 | |
80 | |
81 /* Free a singly linked list of gfc_interface structures. */ | |
82 | |
83 void | |
84 gfc_free_interface (gfc_interface *intr) | |
85 { | |
86 gfc_interface *next; | |
87 | |
88 for (; intr; intr = next) | |
89 { | |
90 next = intr->next; | |
91 free (intr); | |
92 } | |
93 } | |
94 | |
95 | |
96 /* Change the operators unary plus and minus into binary plus and | |
97 minus respectively, leaving the rest unchanged. */ | |
98 | |
99 static gfc_intrinsic_op | |
100 fold_unary_intrinsic (gfc_intrinsic_op op) | |
101 { | |
102 switch (op) | |
103 { | |
104 case INTRINSIC_UPLUS: | |
105 op = INTRINSIC_PLUS; | |
106 break; | |
107 case INTRINSIC_UMINUS: | |
108 op = INTRINSIC_MINUS; | |
109 break; | |
110 default: | |
111 break; | |
112 } | |
113 | |
114 return op; | |
115 } | |
116 | |
117 | |
118 /* Return the operator depending on the DTIO moded string. Note that | |
119 these are not operators in the normal sense and so have been placed | |
120 beyond GFC_INTRINSIC_END in gfortran.h:enum gfc_intrinsic_op. */ | |
121 | |
122 static gfc_intrinsic_op | |
123 dtio_op (char* mode) | |
124 { | |
125 if (strncmp (mode, "formatted", 9) == 0) | |
126 return INTRINSIC_FORMATTED; | |
127 if (strncmp (mode, "unformatted", 9) == 0) | |
128 return INTRINSIC_UNFORMATTED; | |
129 return INTRINSIC_NONE; | |
130 } | |
131 | |
132 | |
133 /* Match a generic specification. Depending on which type of | |
134 interface is found, the 'name' or 'op' pointers may be set. | |
135 This subroutine doesn't return MATCH_NO. */ | |
136 | |
137 match | |
138 gfc_match_generic_spec (interface_type *type, | |
139 char *name, | |
140 gfc_intrinsic_op *op) | |
141 { | |
142 char buffer[GFC_MAX_SYMBOL_LEN + 1]; | |
143 match m; | |
144 gfc_intrinsic_op i; | |
145 | |
146 if (gfc_match (" assignment ( = )") == MATCH_YES) | |
147 { | |
148 *type = INTERFACE_INTRINSIC_OP; | |
149 *op = INTRINSIC_ASSIGN; | |
150 return MATCH_YES; | |
151 } | |
152 | |
153 if (gfc_match (" operator ( %o )", &i) == MATCH_YES) | |
154 { /* Operator i/f */ | |
155 *type = INTERFACE_INTRINSIC_OP; | |
156 *op = fold_unary_intrinsic (i); | |
157 return MATCH_YES; | |
158 } | |
159 | |
160 *op = INTRINSIC_NONE; | |
161 if (gfc_match (" operator ( ") == MATCH_YES) | |
162 { | |
163 m = gfc_match_defined_op_name (buffer, 1); | |
164 if (m == MATCH_NO) | |
165 goto syntax; | |
166 if (m != MATCH_YES) | |
167 return MATCH_ERROR; | |
168 | |
169 m = gfc_match_char (')'); | |
170 if (m == MATCH_NO) | |
171 goto syntax; | |
172 if (m != MATCH_YES) | |
173 return MATCH_ERROR; | |
174 | |
175 strcpy (name, buffer); | |
176 *type = INTERFACE_USER_OP; | |
177 return MATCH_YES; | |
178 } | |
179 | |
180 if (gfc_match (" read ( %n )", buffer) == MATCH_YES) | |
181 { | |
182 *op = dtio_op (buffer); | |
183 if (*op == INTRINSIC_FORMATTED) | |
184 { | |
185 strcpy (name, gfc_code2string (dtio_procs, DTIO_RF)); | |
186 *type = INTERFACE_DTIO; | |
187 } | |
188 if (*op == INTRINSIC_UNFORMATTED) | |
189 { | |
190 strcpy (name, gfc_code2string (dtio_procs, DTIO_RUF)); | |
191 *type = INTERFACE_DTIO; | |
192 } | |
193 if (*op != INTRINSIC_NONE) | |
194 return MATCH_YES; | |
195 } | |
196 | |
197 if (gfc_match (" write ( %n )", buffer) == MATCH_YES) | |
198 { | |
199 *op = dtio_op (buffer); | |
200 if (*op == INTRINSIC_FORMATTED) | |
201 { | |
202 strcpy (name, gfc_code2string (dtio_procs, DTIO_WF)); | |
203 *type = INTERFACE_DTIO; | |
204 } | |
205 if (*op == INTRINSIC_UNFORMATTED) | |
206 { | |
207 strcpy (name, gfc_code2string (dtio_procs, DTIO_WUF)); | |
208 *type = INTERFACE_DTIO; | |
209 } | |
210 if (*op != INTRINSIC_NONE) | |
211 return MATCH_YES; | |
212 } | |
213 | |
214 if (gfc_match_name (buffer) == MATCH_YES) | |
215 { | |
216 strcpy (name, buffer); | |
217 *type = INTERFACE_GENERIC; | |
218 return MATCH_YES; | |
219 } | |
220 | |
221 *type = INTERFACE_NAMELESS; | |
222 return MATCH_YES; | |
223 | |
224 syntax: | |
225 gfc_error ("Syntax error in generic specification at %C"); | |
226 return MATCH_ERROR; | |
227 } | |
228 | |
229 | |
230 /* Match one of the five F95 forms of an interface statement. The | |
231 matcher for the abstract interface follows. */ | |
232 | |
233 match | |
234 gfc_match_interface (void) | |
235 { | |
236 char name[GFC_MAX_SYMBOL_LEN + 1]; | |
237 interface_type type; | |
238 gfc_symbol *sym; | |
239 gfc_intrinsic_op op; | |
240 match m; | |
241 | |
242 m = gfc_match_space (); | |
243 | |
244 if (gfc_match_generic_spec (&type, name, &op) == MATCH_ERROR) | |
245 return MATCH_ERROR; | |
246 | |
247 /* If we're not looking at the end of the statement now, or if this | |
248 is not a nameless interface but we did not see a space, punt. */ | |
249 if (gfc_match_eos () != MATCH_YES | |
250 || (type != INTERFACE_NAMELESS && m != MATCH_YES)) | |
251 { | |
252 gfc_error ("Syntax error: Trailing garbage in INTERFACE statement " | |
253 "at %C"); | |
254 return MATCH_ERROR; | |
255 } | |
256 | |
257 current_interface.type = type; | |
258 | |
259 switch (type) | |
260 { | |
261 case INTERFACE_DTIO: | |
262 case INTERFACE_GENERIC: | |
263 if (gfc_get_symbol (name, NULL, &sym)) | |
264 return MATCH_ERROR; | |
265 | |
266 if (!sym->attr.generic | |
267 && !gfc_add_generic (&sym->attr, sym->name, NULL)) | |
268 return MATCH_ERROR; | |
269 | |
270 if (sym->attr.dummy) | |
271 { | |
272 gfc_error ("Dummy procedure %qs at %C cannot have a " | |
273 "generic interface", sym->name); | |
274 return MATCH_ERROR; | |
275 } | |
276 | |
277 current_interface.sym = gfc_new_block = sym; | |
278 break; | |
279 | |
280 case INTERFACE_USER_OP: | |
281 current_interface.uop = gfc_get_uop (name); | |
282 break; | |
283 | |
284 case INTERFACE_INTRINSIC_OP: | |
285 current_interface.op = op; | |
286 break; | |
287 | |
288 case INTERFACE_NAMELESS: | |
289 case INTERFACE_ABSTRACT: | |
290 break; | |
291 } | |
292 | |
293 return MATCH_YES; | |
294 } | |
295 | |
296 | |
297 | |
298 /* Match a F2003 abstract interface. */ | |
299 | |
300 match | |
301 gfc_match_abstract_interface (void) | |
302 { | |
303 match m; | |
304 | |
305 if (!gfc_notify_std (GFC_STD_F2003, "ABSTRACT INTERFACE at %C")) | |
306 return MATCH_ERROR; | |
307 | |
308 m = gfc_match_eos (); | |
309 | |
310 if (m != MATCH_YES) | |
311 { | |
312 gfc_error ("Syntax error in ABSTRACT INTERFACE statement at %C"); | |
313 return MATCH_ERROR; | |
314 } | |
315 | |
316 current_interface.type = INTERFACE_ABSTRACT; | |
317 | |
318 return m; | |
319 } | |
320 | |
321 | |
322 /* Match the different sort of generic-specs that can be present after | |
323 the END INTERFACE itself. */ | |
324 | |
325 match | |
326 gfc_match_end_interface (void) | |
327 { | |
328 char name[GFC_MAX_SYMBOL_LEN + 1]; | |
329 interface_type type; | |
330 gfc_intrinsic_op op; | |
331 match m; | |
332 | |
333 m = gfc_match_space (); | |
334 | |
335 if (gfc_match_generic_spec (&type, name, &op) == MATCH_ERROR) | |
336 return MATCH_ERROR; | |
337 | |
338 /* If we're not looking at the end of the statement now, or if this | |
339 is not a nameless interface but we did not see a space, punt. */ | |
340 if (gfc_match_eos () != MATCH_YES | |
341 || (type != INTERFACE_NAMELESS && m != MATCH_YES)) | |
342 { | |
343 gfc_error ("Syntax error: Trailing garbage in END INTERFACE " | |
344 "statement at %C"); | |
345 return MATCH_ERROR; | |
346 } | |
347 | |
348 m = MATCH_YES; | |
349 | |
350 switch (current_interface.type) | |
351 { | |
352 case INTERFACE_NAMELESS: | |
353 case INTERFACE_ABSTRACT: | |
354 if (type != INTERFACE_NAMELESS) | |
355 { | |
356 gfc_error ("Expected a nameless interface at %C"); | |
357 m = MATCH_ERROR; | |
358 } | |
359 | |
360 break; | |
361 | |
362 case INTERFACE_INTRINSIC_OP: | |
363 if (type != current_interface.type || op != current_interface.op) | |
364 { | |
365 | |
366 if (current_interface.op == INTRINSIC_ASSIGN) | |
367 { | |
368 m = MATCH_ERROR; | |
369 gfc_error ("Expected %<END INTERFACE ASSIGNMENT (=)%> at %C"); | |
370 } | |
371 else | |
372 { | |
373 const char *s1, *s2; | |
374 s1 = gfc_op2string (current_interface.op); | |
375 s2 = gfc_op2string (op); | |
376 | |
377 /* The following if-statements are used to enforce C1202 | |
378 from F2003. */ | |
379 if ((strcmp(s1, "==") == 0 && strcmp (s2, ".eq.") == 0) | |
380 || (strcmp(s1, ".eq.") == 0 && strcmp (s2, "==") == 0)) | |
381 break; | |
382 if ((strcmp(s1, "/=") == 0 && strcmp (s2, ".ne.") == 0) | |
383 || (strcmp(s1, ".ne.") == 0 && strcmp (s2, "/=") == 0)) | |
384 break; | |
385 if ((strcmp(s1, "<=") == 0 && strcmp (s2, ".le.") == 0) | |
386 || (strcmp(s1, ".le.") == 0 && strcmp (s2, "<=") == 0)) | |
387 break; | |
388 if ((strcmp(s1, "<") == 0 && strcmp (s2, ".lt.") == 0) | |
389 || (strcmp(s1, ".lt.") == 0 && strcmp (s2, "<") == 0)) | |
390 break; | |
391 if ((strcmp(s1, ">=") == 0 && strcmp (s2, ".ge.") == 0) | |
392 || (strcmp(s1, ".ge.") == 0 && strcmp (s2, ">=") == 0)) | |
393 break; | |
394 if ((strcmp(s1, ">") == 0 && strcmp (s2, ".gt.") == 0) | |
395 || (strcmp(s1, ".gt.") == 0 && strcmp (s2, ">") == 0)) | |
396 break; | |
397 | |
398 m = MATCH_ERROR; | |
399 if (strcmp(s2, "none") == 0) | |
400 gfc_error ("Expecting %<END INTERFACE OPERATOR (%s)%> " | |
401 "at %C", s1); | |
402 else | |
403 gfc_error ("Expecting %<END INTERFACE OPERATOR (%s)%> at %C, " | |
404 "but got %qs", s1, s2); | |
405 } | |
406 | |
407 } | |
408 | |
409 break; | |
410 | |
411 case INTERFACE_USER_OP: | |
412 /* Comparing the symbol node names is OK because only use-associated | |
413 symbols can be renamed. */ | |
414 if (type != current_interface.type | |
415 || strcmp (current_interface.uop->name, name) != 0) | |
416 { | |
417 gfc_error ("Expecting %<END INTERFACE OPERATOR (.%s.)%> at %C", | |
418 current_interface.uop->name); | |
419 m = MATCH_ERROR; | |
420 } | |
421 | |
422 break; | |
423 | |
424 case INTERFACE_DTIO: | |
425 case INTERFACE_GENERIC: | |
426 if (type != current_interface.type | |
427 || strcmp (current_interface.sym->name, name) != 0) | |
428 { | |
429 gfc_error ("Expecting %<END INTERFACE %s%> at %C", | |
430 current_interface.sym->name); | |
431 m = MATCH_ERROR; | |
432 } | |
433 | |
434 break; | |
435 } | |
436 | |
437 return m; | |
438 } | |
439 | |
440 | |
441 /* Return whether the component was defined anonymously. */ | |
442 | |
443 static bool | |
444 is_anonymous_component (gfc_component *cmp) | |
445 { | |
446 /* Only UNION and MAP components are anonymous. In the case of a MAP, | |
447 the derived type symbol is FL_STRUCT and the component name looks like mM*. | |
448 This is the only case in which the second character of a component name is | |
449 uppercase. */ | |
450 return cmp->ts.type == BT_UNION | |
451 || (cmp->ts.type == BT_DERIVED | |
452 && cmp->ts.u.derived->attr.flavor == FL_STRUCT | |
453 && cmp->name[0] && cmp->name[1] && ISUPPER (cmp->name[1])); | |
454 } | |
455 | |
456 | |
457 /* Return whether the derived type was defined anonymously. */ | |
458 | |
459 static bool | |
460 is_anonymous_dt (gfc_symbol *derived) | |
461 { | |
462 /* UNION and MAP types are always anonymous. Otherwise, only nested STRUCTURE | |
463 types can be anonymous. For anonymous MAP/STRUCTURE, we have FL_STRUCT | |
464 and the type name looks like XX*. This is the only case in which the | |
465 second character of a type name is uppercase. */ | |
466 return derived->attr.flavor == FL_UNION | |
467 || (derived->attr.flavor == FL_STRUCT | |
468 && derived->name[0] && derived->name[1] && ISUPPER (derived->name[1])); | |
469 } | |
470 | |
471 | |
472 /* Compare components according to 4.4.2 of the Fortran standard. */ | |
473 | |
474 static bool | |
475 compare_components (gfc_component *cmp1, gfc_component *cmp2, | |
476 gfc_symbol *derived1, gfc_symbol *derived2) | |
477 { | |
478 /* Compare names, but not for anonymous components such as UNION or MAP. */ | |
479 if (!is_anonymous_component (cmp1) && !is_anonymous_component (cmp2) | |
480 && strcmp (cmp1->name, cmp2->name) != 0) | |
481 return false; | |
482 | |
483 if (cmp1->attr.access != cmp2->attr.access) | |
484 return false; | |
485 | |
486 if (cmp1->attr.pointer != cmp2->attr.pointer) | |
487 return false; | |
488 | |
489 if (cmp1->attr.dimension != cmp2->attr.dimension) | |
490 return false; | |
491 | |
492 if (cmp1->attr.allocatable != cmp2->attr.allocatable) | |
493 return false; | |
494 | |
495 if (cmp1->attr.dimension && gfc_compare_array_spec (cmp1->as, cmp2->as) == 0) | |
496 return false; | |
497 | |
498 if (cmp1->ts.type == BT_CHARACTER && cmp2->ts.type == BT_CHARACTER) | |
499 { | |
500 gfc_charlen *l1 = cmp1->ts.u.cl; | |
501 gfc_charlen *l2 = cmp2->ts.u.cl; | |
502 if (l1 && l2 && l1->length && l2->length | |
503 && l1->length->expr_type == EXPR_CONSTANT | |
504 && l2->length->expr_type == EXPR_CONSTANT | |
505 && gfc_dep_compare_expr (l1->length, l2->length) != 0) | |
506 return false; | |
507 } | |
508 | |
509 /* Make sure that link lists do not put this function into an | |
510 endless recursive loop! */ | |
511 if (!(cmp1->ts.type == BT_DERIVED && derived1 == cmp1->ts.u.derived) | |
512 && !(cmp2->ts.type == BT_DERIVED && derived2 == cmp2->ts.u.derived) | |
513 && !gfc_compare_types (&cmp1->ts, &cmp2->ts)) | |
514 return false; | |
515 | |
516 else if ( (cmp1->ts.type == BT_DERIVED && derived1 == cmp1->ts.u.derived) | |
517 && !(cmp2->ts.type == BT_DERIVED && derived2 == cmp2->ts.u.derived)) | |
518 return false; | |
519 | |
520 else if (!(cmp1->ts.type == BT_DERIVED && derived1 == cmp1->ts.u.derived) | |
521 && (cmp2->ts.type == BT_DERIVED && derived2 == cmp2->ts.u.derived)) | |
522 return false; | |
523 | |
524 return true; | |
525 } | |
526 | |
527 | |
528 /* Compare two union types by comparing the components of their maps. | |
529 Because unions and maps are anonymous their types get special internal | |
530 names; therefore the usual derived type comparison will fail on them. | |
531 | |
532 Returns nonzero if equal, as with gfc_compare_derived_types. Also as with | |
533 gfc_compare_derived_types, 'equal' is closer to meaning 'duplicate | |
534 definitions' than 'equivalent structure'. */ | |
535 | |
536 static bool | |
537 compare_union_types (gfc_symbol *un1, gfc_symbol *un2) | |
538 { | |
539 gfc_component *map1, *map2, *cmp1, *cmp2; | |
540 gfc_symbol *map1_t, *map2_t; | |
541 | |
542 if (un1->attr.flavor != FL_UNION || un2->attr.flavor != FL_UNION) | |
543 return false; | |
544 | |
545 if (un1->attr.zero_comp != un2->attr.zero_comp) | |
546 return false; | |
547 | |
548 if (un1->attr.zero_comp) | |
549 return true; | |
550 | |
551 map1 = un1->components; | |
552 map2 = un2->components; | |
553 | |
554 /* In terms of 'equality' here we are worried about types which are | |
555 declared the same in two places, not types that represent equivalent | |
556 structures. (This is common because of FORTRAN's weird scoping rules.) | |
557 Though two unions with their maps in different orders could be equivalent, | |
558 we will say they are not equal for the purposes of this test; therefore | |
559 we compare the maps sequentially. */ | |
560 for (;;) | |
561 { | |
562 map1_t = map1->ts.u.derived; | |
563 map2_t = map2->ts.u.derived; | |
564 | |
565 cmp1 = map1_t->components; | |
566 cmp2 = map2_t->components; | |
567 | |
568 /* Protect against null components. */ | |
569 if (map1_t->attr.zero_comp != map2_t->attr.zero_comp) | |
570 return false; | |
571 | |
572 if (map1_t->attr.zero_comp) | |
573 return true; | |
574 | |
575 for (;;) | |
576 { | |
577 /* No two fields will ever point to the same map type unless they are | |
578 the same component, because one map field is created with its type | |
579 declaration. Therefore don't worry about recursion here. */ | |
580 /* TODO: worry about recursion into parent types of the unions? */ | |
581 if (!compare_components (cmp1, cmp2, map1_t, map2_t)) | |
582 return false; | |
583 | |
584 cmp1 = cmp1->next; | |
585 cmp2 = cmp2->next; | |
586 | |
587 if (cmp1 == NULL && cmp2 == NULL) | |
588 break; | |
589 if (cmp1 == NULL || cmp2 == NULL) | |
590 return false; | |
591 } | |
592 | |
593 map1 = map1->next; | |
594 map2 = map2->next; | |
595 | |
596 if (map1 == NULL && map2 == NULL) | |
597 break; | |
598 if (map1 == NULL || map2 == NULL) | |
599 return false; | |
600 } | |
601 | |
602 return true; | |
603 } | |
604 | |
605 | |
606 | |
607 /* Compare two derived types using the criteria in 4.4.2 of the standard, | |
608 recursing through gfc_compare_types for the components. */ | |
609 | |
610 bool | |
611 gfc_compare_derived_types (gfc_symbol *derived1, gfc_symbol *derived2) | |
612 { | |
613 gfc_component *cmp1, *cmp2; | |
614 | |
615 if (derived1 == derived2) | |
616 return true; | |
617 | |
618 if (!derived1 || !derived2) | |
619 gfc_internal_error ("gfc_compare_derived_types: invalid derived type"); | |
620 | |
621 /* Compare UNION types specially. */ | |
622 if (derived1->attr.flavor == FL_UNION || derived2->attr.flavor == FL_UNION) | |
623 return compare_union_types (derived1, derived2); | |
624 | |
625 /* Special case for comparing derived types across namespaces. If the | |
626 true names and module names are the same and the module name is | |
627 nonnull, then they are equal. */ | |
628 if (strcmp (derived1->name, derived2->name) == 0 | |
629 && derived1->module != NULL && derived2->module != NULL | |
630 && strcmp (derived1->module, derived2->module) == 0) | |
631 return true; | |
632 | |
633 /* Compare type via the rules of the standard. Both types must have | |
634 the SEQUENCE or BIND(C) attribute to be equal. STRUCTUREs are special | |
635 because they can be anonymous; therefore two structures with different | |
636 names may be equal. */ | |
637 | |
638 /* Compare names, but not for anonymous types such as UNION or MAP. */ | |
639 if (!is_anonymous_dt (derived1) && !is_anonymous_dt (derived2) | |
640 && strcmp (derived1->name, derived2->name) != 0) | |
641 return false; | |
642 | |
643 if (derived1->component_access == ACCESS_PRIVATE | |
644 || derived2->component_access == ACCESS_PRIVATE) | |
645 return false; | |
646 | |
647 if (!(derived1->attr.sequence && derived2->attr.sequence) | |
648 && !(derived1->attr.is_bind_c && derived2->attr.is_bind_c) | |
649 && !(derived1->attr.pdt_type && derived2->attr.pdt_type)) | |
650 return false; | |
651 | |
652 /* Protect against null components. */ | |
653 if (derived1->attr.zero_comp != derived2->attr.zero_comp) | |
654 return false; | |
655 | |
656 if (derived1->attr.zero_comp) | |
657 return true; | |
658 | |
659 cmp1 = derived1->components; | |
660 cmp2 = derived2->components; | |
661 | |
662 /* Since subtypes of SEQUENCE types must be SEQUENCE types as well, a | |
663 simple test can speed things up. Otherwise, lots of things have to | |
664 match. */ | |
665 for (;;) | |
666 { | |
667 if (!compare_components (cmp1, cmp2, derived1, derived2)) | |
668 return false; | |
669 | |
670 cmp1 = cmp1->next; | |
671 cmp2 = cmp2->next; | |
672 | |
673 if (cmp1 == NULL && cmp2 == NULL) | |
674 break; | |
675 if (cmp1 == NULL || cmp2 == NULL) | |
676 return false; | |
677 } | |
678 | |
679 return true; | |
680 } | |
681 | |
682 | |
683 /* Compare two typespecs, recursively if necessary. */ | |
684 | |
685 bool | |
686 gfc_compare_types (gfc_typespec *ts1, gfc_typespec *ts2) | |
687 { | |
688 /* See if one of the typespecs is a BT_VOID, which is what is being used | |
689 to allow the funcs like c_f_pointer to accept any pointer type. | |
690 TODO: Possibly should narrow this to just the one typespec coming in | |
691 that is for the formal arg, but oh well. */ | |
692 if (ts1->type == BT_VOID || ts2->type == BT_VOID) | |
693 return true; | |
694 | |
695 /* The _data component is not always present, therefore check for its | |
696 presence before assuming, that its derived->attr is available. | |
697 When the _data component is not present, then nevertheless the | |
698 unlimited_polymorphic flag may be set in the derived type's attr. */ | |
699 if (ts1->type == BT_CLASS && ts1->u.derived->components | |
700 && ((ts1->u.derived->attr.is_class | |
701 && ts1->u.derived->components->ts.u.derived->attr | |
702 .unlimited_polymorphic) | |
703 || ts1->u.derived->attr.unlimited_polymorphic)) | |
704 return true; | |
705 | |
706 /* F2003: C717 */ | |
707 if (ts2->type == BT_CLASS && ts1->type == BT_DERIVED | |
708 && ts2->u.derived->components | |
709 && ((ts2->u.derived->attr.is_class | |
710 && ts2->u.derived->components->ts.u.derived->attr | |
711 .unlimited_polymorphic) | |
712 || ts2->u.derived->attr.unlimited_polymorphic) | |
713 && (ts1->u.derived->attr.sequence || ts1->u.derived->attr.is_bind_c)) | |
714 return true; | |
715 | |
716 if (ts1->type != ts2->type | |
717 && ((ts1->type != BT_DERIVED && ts1->type != BT_CLASS) | |
718 || (ts2->type != BT_DERIVED && ts2->type != BT_CLASS))) | |
719 return false; | |
720 | |
721 if (ts1->type == BT_UNION) | |
722 return compare_union_types (ts1->u.derived, ts2->u.derived); | |
723 | |
724 if (ts1->type != BT_DERIVED && ts1->type != BT_CLASS) | |
725 return (ts1->kind == ts2->kind); | |
726 | |
727 /* Compare derived types. */ | |
728 return gfc_type_compatible (ts1, ts2); | |
729 } | |
730 | |
731 | |
732 static bool | |
733 compare_type (gfc_symbol *s1, gfc_symbol *s2) | |
734 { | |
735 if (s2->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK)) | |
736 return true; | |
737 | |
738 /* TYPE and CLASS of the same declared type are type compatible, | |
739 but have different characteristics. */ | |
740 if ((s1->ts.type == BT_CLASS && s2->ts.type == BT_DERIVED) | |
741 || (s1->ts.type == BT_DERIVED && s2->ts.type == BT_CLASS)) | |
742 return false; | |
743 | |
744 return gfc_compare_types (&s1->ts, &s2->ts) || s2->ts.type == BT_ASSUMED; | |
745 } | |
746 | |
747 | |
748 static bool | |
749 compare_rank (gfc_symbol *s1, gfc_symbol *s2) | |
750 { | |
751 gfc_array_spec *as1, *as2; | |
752 int r1, r2; | |
753 | |
754 if (s2->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK)) | |
755 return true; | |
756 | |
757 as1 = (s1->ts.type == BT_CLASS) ? CLASS_DATA (s1)->as : s1->as; | |
758 as2 = (s2->ts.type == BT_CLASS) ? CLASS_DATA (s2)->as : s2->as; | |
759 | |
760 r1 = as1 ? as1->rank : 0; | |
761 r2 = as2 ? as2->rank : 0; | |
762 | |
763 if (r1 != r2 && (!as2 || as2->type != AS_ASSUMED_RANK)) | |
764 return false; /* Ranks differ. */ | |
765 | |
766 return true; | |
767 } | |
768 | |
769 | |
770 /* Given two symbols that are formal arguments, compare their ranks | |
771 and types. Returns true if they have the same rank and type, | |
772 false otherwise. */ | |
773 | |
774 static bool | |
775 compare_type_rank (gfc_symbol *s1, gfc_symbol *s2) | |
776 { | |
777 return compare_type (s1, s2) && compare_rank (s1, s2); | |
778 } | |
779 | |
780 | |
781 /* Given two symbols that are formal arguments, compare their types | |
782 and rank and their formal interfaces if they are both dummy | |
783 procedures. Returns true if the same, false if different. */ | |
784 | |
785 static bool | |
786 compare_type_rank_if (gfc_symbol *s1, gfc_symbol *s2) | |
787 { | |
788 if (s1 == NULL || s2 == NULL) | |
789 return (s1 == s2); | |
790 | |
791 if (s1 == s2) | |
792 return true; | |
793 | |
794 if (s1->attr.flavor != FL_PROCEDURE && s2->attr.flavor != FL_PROCEDURE) | |
795 return compare_type_rank (s1, s2); | |
796 | |
797 if (s1->attr.flavor != FL_PROCEDURE || s2->attr.flavor != FL_PROCEDURE) | |
798 return false; | |
799 | |
800 /* At this point, both symbols are procedures. It can happen that | |
801 external procedures are compared, where one is identified by usage | |
802 to be a function or subroutine but the other is not. Check TKR | |
803 nonetheless for these cases. */ | |
804 if (s1->attr.function == 0 && s1->attr.subroutine == 0) | |
805 return s1->attr.external ? compare_type_rank (s1, s2) : false; | |
806 | |
807 if (s2->attr.function == 0 && s2->attr.subroutine == 0) | |
808 return s2->attr.external ? compare_type_rank (s1, s2) : false; | |
809 | |
810 /* Now the type of procedure has been identified. */ | |
811 if (s1->attr.function != s2->attr.function | |
812 || s1->attr.subroutine != s2->attr.subroutine) | |
813 return false; | |
814 | |
815 if (s1->attr.function && !compare_type_rank (s1, s2)) | |
816 return false; | |
817 | |
818 /* Originally, gfortran recursed here to check the interfaces of passed | |
819 procedures. This is explicitly not required by the standard. */ | |
820 return true; | |
821 } | |
822 | |
823 | |
824 /* Given a formal argument list and a keyword name, search the list | |
825 for that keyword. Returns the correct symbol node if found, NULL | |
826 if not found. */ | |
827 | |
828 static gfc_symbol * | |
829 find_keyword_arg (const char *name, gfc_formal_arglist *f) | |
830 { | |
831 for (; f; f = f->next) | |
832 if (strcmp (f->sym->name, name) == 0) | |
833 return f->sym; | |
834 | |
835 return NULL; | |
836 } | |
837 | |
838 | |
839 /******** Interface checking subroutines **********/ | |
840 | |
841 | |
842 /* Given an operator interface and the operator, make sure that all | |
843 interfaces for that operator are legal. */ | |
844 | |
845 bool | |
846 gfc_check_operator_interface (gfc_symbol *sym, gfc_intrinsic_op op, | |
847 locus opwhere) | |
848 { | |
849 gfc_formal_arglist *formal; | |
850 sym_intent i1, i2; | |
851 bt t1, t2; | |
852 int args, r1, r2, k1, k2; | |
853 | |
854 gcc_assert (sym); | |
855 | |
856 args = 0; | |
857 t1 = t2 = BT_UNKNOWN; | |
858 i1 = i2 = INTENT_UNKNOWN; | |
859 r1 = r2 = -1; | |
860 k1 = k2 = -1; | |
861 | |
862 for (formal = gfc_sym_get_dummy_args (sym); formal; formal = formal->next) | |
863 { | |
864 gfc_symbol *fsym = formal->sym; | |
865 if (fsym == NULL) | |
866 { | |
867 gfc_error ("Alternate return cannot appear in operator " | |
868 "interface at %L", &sym->declared_at); | |
869 return false; | |
870 } | |
871 if (args == 0) | |
872 { | |
873 t1 = fsym->ts.type; | |
874 i1 = fsym->attr.intent; | |
875 r1 = (fsym->as != NULL) ? fsym->as->rank : 0; | |
876 k1 = fsym->ts.kind; | |
877 } | |
878 if (args == 1) | |
879 { | |
880 t2 = fsym->ts.type; | |
881 i2 = fsym->attr.intent; | |
882 r2 = (fsym->as != NULL) ? fsym->as->rank : 0; | |
883 k2 = fsym->ts.kind; | |
884 } | |
885 args++; | |
886 } | |
887 | |
888 /* Only +, - and .not. can be unary operators. | |
889 .not. cannot be a binary operator. */ | |
890 if (args == 0 || args > 2 || (args == 1 && op != INTRINSIC_PLUS | |
891 && op != INTRINSIC_MINUS | |
892 && op != INTRINSIC_NOT) | |
893 || (args == 2 && op == INTRINSIC_NOT)) | |
894 { | |
895 if (op == INTRINSIC_ASSIGN) | |
896 gfc_error ("Assignment operator interface at %L must have " | |
897 "two arguments", &sym->declared_at); | |
898 else | |
899 gfc_error ("Operator interface at %L has the wrong number of arguments", | |
900 &sym->declared_at); | |
901 return false; | |
902 } | |
903 | |
904 /* Check that intrinsics are mapped to functions, except | |
905 INTRINSIC_ASSIGN which should map to a subroutine. */ | |
906 if (op == INTRINSIC_ASSIGN) | |
907 { | |
908 gfc_formal_arglist *dummy_args; | |
909 | |
910 if (!sym->attr.subroutine) | |
911 { | |
912 gfc_error ("Assignment operator interface at %L must be " | |
913 "a SUBROUTINE", &sym->declared_at); | |
914 return false; | |
915 } | |
916 | |
917 /* Allowed are (per F2003, 12.3.2.1.2 Defined assignments): | |
918 - First argument an array with different rank than second, | |
919 - First argument is a scalar and second an array, | |
920 - Types and kinds do not conform, or | |
921 - First argument is of derived type. */ | |
922 dummy_args = gfc_sym_get_dummy_args (sym); | |
923 if (dummy_args->sym->ts.type != BT_DERIVED | |
924 && dummy_args->sym->ts.type != BT_CLASS | |
925 && (r2 == 0 || r1 == r2) | |
926 && (dummy_args->sym->ts.type == dummy_args->next->sym->ts.type | |
927 || (gfc_numeric_ts (&dummy_args->sym->ts) | |
928 && gfc_numeric_ts (&dummy_args->next->sym->ts)))) | |
929 { | |
930 gfc_error ("Assignment operator interface at %L must not redefine " | |
931 "an INTRINSIC type assignment", &sym->declared_at); | |
932 return false; | |
933 } | |
934 } | |
935 else | |
936 { | |
937 if (!sym->attr.function) | |
938 { | |
939 gfc_error ("Intrinsic operator interface at %L must be a FUNCTION", | |
940 &sym->declared_at); | |
941 return false; | |
942 } | |
943 } | |
944 | |
945 /* Check intents on operator interfaces. */ | |
946 if (op == INTRINSIC_ASSIGN) | |
947 { | |
948 if (i1 != INTENT_OUT && i1 != INTENT_INOUT) | |
949 { | |
950 gfc_error ("First argument of defined assignment at %L must be " | |
951 "INTENT(OUT) or INTENT(INOUT)", &sym->declared_at); | |
952 return false; | |
953 } | |
954 | |
955 if (i2 != INTENT_IN) | |
956 { | |
957 gfc_error ("Second argument of defined assignment at %L must be " | |
958 "INTENT(IN)", &sym->declared_at); | |
959 return false; | |
960 } | |
961 } | |
962 else | |
963 { | |
964 if (i1 != INTENT_IN) | |
965 { | |
966 gfc_error ("First argument of operator interface at %L must be " | |
967 "INTENT(IN)", &sym->declared_at); | |
968 return false; | |
969 } | |
970 | |
971 if (args == 2 && i2 != INTENT_IN) | |
972 { | |
973 gfc_error ("Second argument of operator interface at %L must be " | |
974 "INTENT(IN)", &sym->declared_at); | |
975 return false; | |
976 } | |
977 } | |
978 | |
979 /* From now on, all we have to do is check that the operator definition | |
980 doesn't conflict with an intrinsic operator. The rules for this | |
981 game are defined in 7.1.2 and 7.1.3 of both F95 and F2003 standards, | |
982 as well as 12.3.2.1.1 of Fortran 2003: | |
983 | |
984 "If the operator is an intrinsic-operator (R310), the number of | |
985 function arguments shall be consistent with the intrinsic uses of | |
986 that operator, and the types, kind type parameters, or ranks of the | |
987 dummy arguments shall differ from those required for the intrinsic | |
988 operation (7.1.2)." */ | |
989 | |
990 #define IS_NUMERIC_TYPE(t) \ | |
991 ((t) == BT_INTEGER || (t) == BT_REAL || (t) == BT_COMPLEX) | |
992 | |
993 /* Unary ops are easy, do them first. */ | |
994 if (op == INTRINSIC_NOT) | |
995 { | |
996 if (t1 == BT_LOGICAL) | |
997 goto bad_repl; | |
998 else | |
999 return true; | |
1000 } | |
1001 | |
1002 if (args == 1 && (op == INTRINSIC_PLUS || op == INTRINSIC_MINUS)) | |
1003 { | |
1004 if (IS_NUMERIC_TYPE (t1)) | |
1005 goto bad_repl; | |
1006 else | |
1007 return true; | |
1008 } | |
1009 | |
1010 /* Character intrinsic operators have same character kind, thus | |
1011 operator definitions with operands of different character kinds | |
1012 are always safe. */ | |
1013 if (t1 == BT_CHARACTER && t2 == BT_CHARACTER && k1 != k2) | |
1014 return true; | |
1015 | |
1016 /* Intrinsic operators always perform on arguments of same rank, | |
1017 so different ranks is also always safe. (rank == 0) is an exception | |
1018 to that, because all intrinsic operators are elemental. */ | |
1019 if (r1 != r2 && r1 != 0 && r2 != 0) | |
1020 return true; | |
1021 | |
1022 switch (op) | |
1023 { | |
1024 case INTRINSIC_EQ: | |
1025 case INTRINSIC_EQ_OS: | |
1026 case INTRINSIC_NE: | |
1027 case INTRINSIC_NE_OS: | |
1028 if (t1 == BT_CHARACTER && t2 == BT_CHARACTER) | |
1029 goto bad_repl; | |
1030 /* Fall through. */ | |
1031 | |
1032 case INTRINSIC_PLUS: | |
1033 case INTRINSIC_MINUS: | |
1034 case INTRINSIC_TIMES: | |
1035 case INTRINSIC_DIVIDE: | |
1036 case INTRINSIC_POWER: | |
1037 if (IS_NUMERIC_TYPE (t1) && IS_NUMERIC_TYPE (t2)) | |
1038 goto bad_repl; | |
1039 break; | |
1040 | |
1041 case INTRINSIC_GT: | |
1042 case INTRINSIC_GT_OS: | |
1043 case INTRINSIC_GE: | |
1044 case INTRINSIC_GE_OS: | |
1045 case INTRINSIC_LT: | |
1046 case INTRINSIC_LT_OS: | |
1047 case INTRINSIC_LE: | |
1048 case INTRINSIC_LE_OS: | |
1049 if (t1 == BT_CHARACTER && t2 == BT_CHARACTER) | |
1050 goto bad_repl; | |
1051 if ((t1 == BT_INTEGER || t1 == BT_REAL) | |
1052 && (t2 == BT_INTEGER || t2 == BT_REAL)) | |
1053 goto bad_repl; | |
1054 break; | |
1055 | |
1056 case INTRINSIC_CONCAT: | |
1057 if (t1 == BT_CHARACTER && t2 == BT_CHARACTER) | |
1058 goto bad_repl; | |
1059 break; | |
1060 | |
1061 case INTRINSIC_AND: | |
1062 case INTRINSIC_OR: | |
1063 case INTRINSIC_EQV: | |
1064 case INTRINSIC_NEQV: | |
1065 if (t1 == BT_LOGICAL && t2 == BT_LOGICAL) | |
1066 goto bad_repl; | |
1067 break; | |
1068 | |
1069 default: | |
1070 break; | |
1071 } | |
1072 | |
1073 return true; | |
1074 | |
1075 #undef IS_NUMERIC_TYPE | |
1076 | |
1077 bad_repl: | |
1078 gfc_error ("Operator interface at %L conflicts with intrinsic interface", | |
1079 &opwhere); | |
1080 return false; | |
1081 } | |
1082 | |
1083 | |
1084 /* Given a pair of formal argument lists, we see if the two lists can | |
1085 be distinguished by counting the number of nonoptional arguments of | |
1086 a given type/rank in f1 and seeing if there are less then that | |
1087 number of those arguments in f2 (including optional arguments). | |
1088 Since this test is asymmetric, it has to be called twice to make it | |
1089 symmetric. Returns nonzero if the argument lists are incompatible | |
1090 by this test. This subroutine implements rule 1 of section F03:16.2.3. | |
1091 'p1' and 'p2' are the PASS arguments of both procedures (if applicable). */ | |
1092 | |
1093 static bool | |
1094 count_types_test (gfc_formal_arglist *f1, gfc_formal_arglist *f2, | |
1095 const char *p1, const char *p2) | |
1096 { | |
1097 int ac1, ac2, i, j, k, n1; | |
1098 gfc_formal_arglist *f; | |
1099 | |
1100 typedef struct | |
1101 { | |
1102 int flag; | |
1103 gfc_symbol *sym; | |
1104 } | |
1105 arginfo; | |
1106 | |
1107 arginfo *arg; | |
1108 | |
1109 n1 = 0; | |
1110 | |
1111 for (f = f1; f; f = f->next) | |
1112 n1++; | |
1113 | |
1114 /* Build an array of integers that gives the same integer to | |
1115 arguments of the same type/rank. */ | |
1116 arg = XCNEWVEC (arginfo, n1); | |
1117 | |
1118 f = f1; | |
1119 for (i = 0; i < n1; i++, f = f->next) | |
1120 { | |
1121 arg[i].flag = -1; | |
1122 arg[i].sym = f->sym; | |
1123 } | |
1124 | |
1125 k = 0; | |
1126 | |
1127 for (i = 0; i < n1; i++) | |
1128 { | |
1129 if (arg[i].flag != -1) | |
1130 continue; | |
1131 | |
1132 if (arg[i].sym && (arg[i].sym->attr.optional | |
1133 || (p1 && strcmp (arg[i].sym->name, p1) == 0))) | |
1134 continue; /* Skip OPTIONAL and PASS arguments. */ | |
1135 | |
1136 arg[i].flag = k; | |
1137 | |
1138 /* Find other non-optional, non-pass arguments of the same type/rank. */ | |
1139 for (j = i + 1; j < n1; j++) | |
1140 if ((arg[j].sym == NULL | |
1141 || !(arg[j].sym->attr.optional | |
1142 || (p1 && strcmp (arg[j].sym->name, p1) == 0))) | |
1143 && (compare_type_rank_if (arg[i].sym, arg[j].sym) | |
1144 || compare_type_rank_if (arg[j].sym, arg[i].sym))) | |
1145 arg[j].flag = k; | |
1146 | |
1147 k++; | |
1148 } | |
1149 | |
1150 /* Now loop over each distinct type found in f1. */ | |
1151 k = 0; | |
1152 bool rc = false; | |
1153 | |
1154 for (i = 0; i < n1; i++) | |
1155 { | |
1156 if (arg[i].flag != k) | |
1157 continue; | |
1158 | |
1159 ac1 = 1; | |
1160 for (j = i + 1; j < n1; j++) | |
1161 if (arg[j].flag == k) | |
1162 ac1++; | |
1163 | |
1164 /* Count the number of non-pass arguments in f2 with that type, | |
1165 including those that are optional. */ | |
1166 ac2 = 0; | |
1167 | |
1168 for (f = f2; f; f = f->next) | |
1169 if ((!p2 || strcmp (f->sym->name, p2) != 0) | |
1170 && (compare_type_rank_if (arg[i].sym, f->sym) | |
1171 || compare_type_rank_if (f->sym, arg[i].sym))) | |
1172 ac2++; | |
1173 | |
1174 if (ac1 > ac2) | |
1175 { | |
1176 rc = true; | |
1177 break; | |
1178 } | |
1179 | |
1180 k++; | |
1181 } | |
1182 | |
1183 free (arg); | |
1184 | |
1185 return rc; | |
1186 } | |
1187 | |
1188 | |
1189 /* Perform the correspondence test in rule (3) of F08:C1215. | |
1190 Returns zero if no argument is found that satisfies this rule, | |
1191 nonzero otherwise. 'p1' and 'p2' are the PASS arguments of both procedures | |
1192 (if applicable). | |
1193 | |
1194 This test is also not symmetric in f1 and f2 and must be called | |
1195 twice. This test finds problems caused by sorting the actual | |
1196 argument list with keywords. For example: | |
1197 | |
1198 INTERFACE FOO | |
1199 SUBROUTINE F1(A, B) | |
1200 INTEGER :: A ; REAL :: B | |
1201 END SUBROUTINE F1 | |
1202 | |
1203 SUBROUTINE F2(B, A) | |
1204 INTEGER :: A ; REAL :: B | |
1205 END SUBROUTINE F1 | |
1206 END INTERFACE FOO | |
1207 | |
1208 At this point, 'CALL FOO(A=1, B=1.0)' is ambiguous. */ | |
1209 | |
1210 static bool | |
1211 generic_correspondence (gfc_formal_arglist *f1, gfc_formal_arglist *f2, | |
1212 const char *p1, const char *p2) | |
1213 { | |
1214 gfc_formal_arglist *f2_save, *g; | |
1215 gfc_symbol *sym; | |
1216 | |
1217 f2_save = f2; | |
1218 | |
1219 while (f1) | |
1220 { | |
1221 if (f1->sym->attr.optional) | |
1222 goto next; | |
1223 | |
1224 if (p1 && strcmp (f1->sym->name, p1) == 0) | |
1225 f1 = f1->next; | |
1226 if (f2 && p2 && strcmp (f2->sym->name, p2) == 0) | |
1227 f2 = f2->next; | |
1228 | |
1229 if (f2 != NULL && (compare_type_rank (f1->sym, f2->sym) | |
1230 || compare_type_rank (f2->sym, f1->sym)) | |
1231 && !((gfc_option.allow_std & GFC_STD_F2008) | |
1232 && ((f1->sym->attr.allocatable && f2->sym->attr.pointer) | |
1233 || (f2->sym->attr.allocatable && f1->sym->attr.pointer)))) | |
1234 goto next; | |
1235 | |
1236 /* Now search for a disambiguating keyword argument starting at | |
1237 the current non-match. */ | |
1238 for (g = f1; g; g = g->next) | |
1239 { | |
1240 if (g->sym->attr.optional || (p1 && strcmp (g->sym->name, p1) == 0)) | |
1241 continue; | |
1242 | |
1243 sym = find_keyword_arg (g->sym->name, f2_save); | |
1244 if (sym == NULL || !compare_type_rank (g->sym, sym) | |
1245 || ((gfc_option.allow_std & GFC_STD_F2008) | |
1246 && ((sym->attr.allocatable && g->sym->attr.pointer) | |
1247 || (sym->attr.pointer && g->sym->attr.allocatable)))) | |
1248 return true; | |
1249 } | |
1250 | |
1251 next: | |
1252 if (f1 != NULL) | |
1253 f1 = f1->next; | |
1254 if (f2 != NULL) | |
1255 f2 = f2->next; | |
1256 } | |
1257 | |
1258 return false; | |
1259 } | |
1260 | |
1261 | |
1262 static int | |
1263 symbol_rank (gfc_symbol *sym) | |
1264 { | |
1265 gfc_array_spec *as; | |
1266 as = (sym->ts.type == BT_CLASS) ? CLASS_DATA (sym)->as : sym->as; | |
1267 return as ? as->rank : 0; | |
1268 } | |
1269 | |
1270 | |
1271 /* Check if the characteristics of two dummy arguments match, | |
1272 cf. F08:12.3.2. */ | |
1273 | |
1274 bool | |
1275 gfc_check_dummy_characteristics (gfc_symbol *s1, gfc_symbol *s2, | |
1276 bool type_must_agree, char *errmsg, | |
1277 int err_len) | |
1278 { | |
1279 if (s1 == NULL || s2 == NULL) | |
1280 return s1 == s2 ? true : false; | |
1281 | |
1282 /* Check type and rank. */ | |
1283 if (type_must_agree) | |
1284 { | |
1285 if (!compare_type (s1, s2) || !compare_type (s2, s1)) | |
1286 { | |
1287 snprintf (errmsg, err_len, "Type mismatch in argument '%s' (%s/%s)", | |
1288 s1->name, gfc_typename (&s1->ts), gfc_typename (&s2->ts)); | |
1289 return false; | |
1290 } | |
1291 if (!compare_rank (s1, s2)) | |
1292 { | |
1293 snprintf (errmsg, err_len, "Rank mismatch in argument '%s' (%i/%i)", | |
1294 s1->name, symbol_rank (s1), symbol_rank (s2)); | |
1295 return false; | |
1296 } | |
1297 } | |
1298 | |
1299 /* Check INTENT. */ | |
1300 if (s1->attr.intent != s2->attr.intent) | |
1301 { | |
1302 snprintf (errmsg, err_len, "INTENT mismatch in argument '%s'", | |
1303 s1->name); | |
1304 return false; | |
1305 } | |
1306 | |
1307 /* Check OPTIONAL attribute. */ | |
1308 if (s1->attr.optional != s2->attr.optional) | |
1309 { | |
1310 snprintf (errmsg, err_len, "OPTIONAL mismatch in argument '%s'", | |
1311 s1->name); | |
1312 return false; | |
1313 } | |
1314 | |
1315 /* Check ALLOCATABLE attribute. */ | |
1316 if (s1->attr.allocatable != s2->attr.allocatable) | |
1317 { | |
1318 snprintf (errmsg, err_len, "ALLOCATABLE mismatch in argument '%s'", | |
1319 s1->name); | |
1320 return false; | |
1321 } | |
1322 | |
1323 /* Check POINTER attribute. */ | |
1324 if (s1->attr.pointer != s2->attr.pointer) | |
1325 { | |
1326 snprintf (errmsg, err_len, "POINTER mismatch in argument '%s'", | |
1327 s1->name); | |
1328 return false; | |
1329 } | |
1330 | |
1331 /* Check TARGET attribute. */ | |
1332 if (s1->attr.target != s2->attr.target) | |
1333 { | |
1334 snprintf (errmsg, err_len, "TARGET mismatch in argument '%s'", | |
1335 s1->name); | |
1336 return false; | |
1337 } | |
1338 | |
1339 /* Check ASYNCHRONOUS attribute. */ | |
1340 if (s1->attr.asynchronous != s2->attr.asynchronous) | |
1341 { | |
1342 snprintf (errmsg, err_len, "ASYNCHRONOUS mismatch in argument '%s'", | |
1343 s1->name); | |
1344 return false; | |
1345 } | |
1346 | |
1347 /* Check CONTIGUOUS attribute. */ | |
1348 if (s1->attr.contiguous != s2->attr.contiguous) | |
1349 { | |
1350 snprintf (errmsg, err_len, "CONTIGUOUS mismatch in argument '%s'", | |
1351 s1->name); | |
1352 return false; | |
1353 } | |
1354 | |
1355 /* Check VALUE attribute. */ | |
1356 if (s1->attr.value != s2->attr.value) | |
1357 { | |
1358 snprintf (errmsg, err_len, "VALUE mismatch in argument '%s'", | |
1359 s1->name); | |
1360 return false; | |
1361 } | |
1362 | |
1363 /* Check VOLATILE attribute. */ | |
1364 if (s1->attr.volatile_ != s2->attr.volatile_) | |
1365 { | |
1366 snprintf (errmsg, err_len, "VOLATILE mismatch in argument '%s'", | |
1367 s1->name); | |
1368 return false; | |
1369 } | |
1370 | |
1371 /* Check interface of dummy procedures. */ | |
1372 if (s1->attr.flavor == FL_PROCEDURE) | |
1373 { | |
1374 char err[200]; | |
1375 if (!gfc_compare_interfaces (s1, s2, s2->name, 0, 1, err, sizeof(err), | |
1376 NULL, NULL)) | |
1377 { | |
1378 snprintf (errmsg, err_len, "Interface mismatch in dummy procedure " | |
1379 "'%s': %s", s1->name, err); | |
1380 return false; | |
1381 } | |
1382 } | |
1383 | |
1384 /* Check string length. */ | |
1385 if (s1->ts.type == BT_CHARACTER | |
1386 && s1->ts.u.cl && s1->ts.u.cl->length | |
1387 && s2->ts.u.cl && s2->ts.u.cl->length) | |
1388 { | |
1389 int compval = gfc_dep_compare_expr (s1->ts.u.cl->length, | |
1390 s2->ts.u.cl->length); | |
1391 switch (compval) | |
1392 { | |
1393 case -1: | |
1394 case 1: | |
1395 case -3: | |
1396 snprintf (errmsg, err_len, "Character length mismatch " | |
1397 "in argument '%s'", s1->name); | |
1398 return false; | |
1399 | |
1400 case -2: | |
1401 /* FIXME: Implement a warning for this case. | |
1402 gfc_warning (0, "Possible character length mismatch in argument %qs", | |
1403 s1->name);*/ | |
1404 break; | |
1405 | |
1406 case 0: | |
1407 break; | |
1408 | |
1409 default: | |
1410 gfc_internal_error ("check_dummy_characteristics: Unexpected result " | |
1411 "%i of gfc_dep_compare_expr", compval); | |
1412 break; | |
1413 } | |
1414 } | |
1415 | |
1416 /* Check array shape. */ | |
1417 if (s1->as && s2->as) | |
1418 { | |
1419 int i, compval; | |
1420 gfc_expr *shape1, *shape2; | |
1421 | |
1422 if (s1->as->type != s2->as->type) | |
1423 { | |
1424 snprintf (errmsg, err_len, "Shape mismatch in argument '%s'", | |
1425 s1->name); | |
1426 return false; | |
1427 } | |
1428 | |
1429 if (s1->as->corank != s2->as->corank) | |
1430 { | |
1431 snprintf (errmsg, err_len, "Corank mismatch in argument '%s' (%i/%i)", | |
1432 s1->name, s1->as->corank, s2->as->corank); | |
1433 return false; | |
1434 } | |
1435 | |
1436 if (s1->as->type == AS_EXPLICIT) | |
1437 for (i = 0; i < s1->as->rank + MAX (0, s1->as->corank-1); i++) | |
1438 { | |
1439 shape1 = gfc_subtract (gfc_copy_expr (s1->as->upper[i]), | |
1440 gfc_copy_expr (s1->as->lower[i])); | |
1441 shape2 = gfc_subtract (gfc_copy_expr (s2->as->upper[i]), | |
1442 gfc_copy_expr (s2->as->lower[i])); | |
1443 compval = gfc_dep_compare_expr (shape1, shape2); | |
1444 gfc_free_expr (shape1); | |
1445 gfc_free_expr (shape2); | |
1446 switch (compval) | |
1447 { | |
1448 case -1: | |
1449 case 1: | |
1450 case -3: | |
1451 if (i < s1->as->rank) | |
1452 snprintf (errmsg, err_len, "Shape mismatch in dimension %i of" | |
1453 " argument '%s'", i + 1, s1->name); | |
1454 else | |
1455 snprintf (errmsg, err_len, "Shape mismatch in codimension %i " | |
1456 "of argument '%s'", i - s1->as->rank + 1, s1->name); | |
1457 return false; | |
1458 | |
1459 case -2: | |
1460 /* FIXME: Implement a warning for this case. | |
1461 gfc_warning (0, "Possible shape mismatch in argument %qs", | |
1462 s1->name);*/ | |
1463 break; | |
1464 | |
1465 case 0: | |
1466 break; | |
1467 | |
1468 default: | |
1469 gfc_internal_error ("check_dummy_characteristics: Unexpected " | |
1470 "result %i of gfc_dep_compare_expr", | |
1471 compval); | |
1472 break; | |
1473 } | |
1474 } | |
1475 } | |
1476 | |
1477 return true; | |
1478 } | |
1479 | |
1480 | |
1481 /* Check if the characteristics of two function results match, | |
1482 cf. F08:12.3.3. */ | |
1483 | |
1484 bool | |
1485 gfc_check_result_characteristics (gfc_symbol *s1, gfc_symbol *s2, | |
1486 char *errmsg, int err_len) | |
1487 { | |
1488 gfc_symbol *r1, *r2; | |
1489 | |
1490 if (s1->ts.interface && s1->ts.interface->result) | |
1491 r1 = s1->ts.interface->result; | |
1492 else | |
1493 r1 = s1->result ? s1->result : s1; | |
1494 | |
1495 if (s2->ts.interface && s2->ts.interface->result) | |
1496 r2 = s2->ts.interface->result; | |
1497 else | |
1498 r2 = s2->result ? s2->result : s2; | |
1499 | |
1500 if (r1->ts.type == BT_UNKNOWN) | |
1501 return true; | |
1502 | |
1503 /* Check type and rank. */ | |
1504 if (!compare_type (r1, r2)) | |
1505 { | |
1506 snprintf (errmsg, err_len, "Type mismatch in function result (%s/%s)", | |
1507 gfc_typename (&r1->ts), gfc_typename (&r2->ts)); | |
1508 return false; | |
1509 } | |
1510 if (!compare_rank (r1, r2)) | |
1511 { | |
1512 snprintf (errmsg, err_len, "Rank mismatch in function result (%i/%i)", | |
1513 symbol_rank (r1), symbol_rank (r2)); | |
1514 return false; | |
1515 } | |
1516 | |
1517 /* Check ALLOCATABLE attribute. */ | |
1518 if (r1->attr.allocatable != r2->attr.allocatable) | |
1519 { | |
1520 snprintf (errmsg, err_len, "ALLOCATABLE attribute mismatch in " | |
1521 "function result"); | |
1522 return false; | |
1523 } | |
1524 | |
1525 /* Check POINTER attribute. */ | |
1526 if (r1->attr.pointer != r2->attr.pointer) | |
1527 { | |
1528 snprintf (errmsg, err_len, "POINTER attribute mismatch in " | |
1529 "function result"); | |
1530 return false; | |
1531 } | |
1532 | |
1533 /* Check CONTIGUOUS attribute. */ | |
1534 if (r1->attr.contiguous != r2->attr.contiguous) | |
1535 { | |
1536 snprintf (errmsg, err_len, "CONTIGUOUS attribute mismatch in " | |
1537 "function result"); | |
1538 return false; | |
1539 } | |
1540 | |
1541 /* Check PROCEDURE POINTER attribute. */ | |
1542 if (r1 != s1 && r1->attr.proc_pointer != r2->attr.proc_pointer) | |
1543 { | |
1544 snprintf (errmsg, err_len, "PROCEDURE POINTER mismatch in " | |
1545 "function result"); | |
1546 return false; | |
1547 } | |
1548 | |
1549 /* Check string length. */ | |
1550 if (r1->ts.type == BT_CHARACTER && r1->ts.u.cl && r2->ts.u.cl) | |
1551 { | |
1552 if (r1->ts.deferred != r2->ts.deferred) | |
1553 { | |
1554 snprintf (errmsg, err_len, "Character length mismatch " | |
1555 "in function result"); | |
1556 return false; | |
1557 } | |
1558 | |
1559 if (r1->ts.u.cl->length && r2->ts.u.cl->length) | |
1560 { | |
1561 int compval = gfc_dep_compare_expr (r1->ts.u.cl->length, | |
1562 r2->ts.u.cl->length); | |
1563 switch (compval) | |
1564 { | |
1565 case -1: | |
1566 case 1: | |
1567 case -3: | |
1568 snprintf (errmsg, err_len, "Character length mismatch " | |
1569 "in function result"); | |
1570 return false; | |
1571 | |
1572 case -2: | |
1573 /* FIXME: Implement a warning for this case. | |
1574 snprintf (errmsg, err_len, "Possible character length mismatch " | |
1575 "in function result");*/ | |
1576 break; | |
1577 | |
1578 case 0: | |
1579 break; | |
1580 | |
1581 default: | |
1582 gfc_internal_error ("check_result_characteristics (1): Unexpected " | |
1583 "result %i of gfc_dep_compare_expr", compval); | |
1584 break; | |
1585 } | |
1586 } | |
1587 } | |
1588 | |
1589 /* Check array shape. */ | |
1590 if (!r1->attr.allocatable && !r1->attr.pointer && r1->as && r2->as) | |
1591 { | |
1592 int i, compval; | |
1593 gfc_expr *shape1, *shape2; | |
1594 | |
1595 if (r1->as->type != r2->as->type) | |
1596 { | |
1597 snprintf (errmsg, err_len, "Shape mismatch in function result"); | |
1598 return false; | |
1599 } | |
1600 | |
1601 if (r1->as->type == AS_EXPLICIT) | |
1602 for (i = 0; i < r1->as->rank + r1->as->corank; i++) | |
1603 { | |
1604 shape1 = gfc_subtract (gfc_copy_expr (r1->as->upper[i]), | |
1605 gfc_copy_expr (r1->as->lower[i])); | |
1606 shape2 = gfc_subtract (gfc_copy_expr (r2->as->upper[i]), | |
1607 gfc_copy_expr (r2->as->lower[i])); | |
1608 compval = gfc_dep_compare_expr (shape1, shape2); | |
1609 gfc_free_expr (shape1); | |
1610 gfc_free_expr (shape2); | |
1611 switch (compval) | |
1612 { | |
1613 case -1: | |
1614 case 1: | |
1615 case -3: | |
1616 snprintf (errmsg, err_len, "Shape mismatch in dimension %i of " | |
1617 "function result", i + 1); | |
1618 return false; | |
1619 | |
1620 case -2: | |
1621 /* FIXME: Implement a warning for this case. | |
1622 gfc_warning (0, "Possible shape mismatch in return value");*/ | |
1623 break; | |
1624 | |
1625 case 0: | |
1626 break; | |
1627 | |
1628 default: | |
1629 gfc_internal_error ("check_result_characteristics (2): " | |
1630 "Unexpected result %i of " | |
1631 "gfc_dep_compare_expr", compval); | |
1632 break; | |
1633 } | |
1634 } | |
1635 } | |
1636 | |
1637 return true; | |
1638 } | |
1639 | |
1640 | |
1641 /* 'Compare' two formal interfaces associated with a pair of symbols. | |
1642 We return true if there exists an actual argument list that | |
1643 would be ambiguous between the two interfaces, zero otherwise. | |
1644 'strict_flag' specifies whether all the characteristics are | |
1645 required to match, which is not the case for ambiguity checks. | |
1646 'p1' and 'p2' are the PASS arguments of both procedures (if applicable). */ | |
1647 | |
1648 bool | |
1649 gfc_compare_interfaces (gfc_symbol *s1, gfc_symbol *s2, const char *name2, | |
1650 int generic_flag, int strict_flag, | |
1651 char *errmsg, int err_len, | |
1652 const char *p1, const char *p2) | |
1653 { | |
1654 gfc_formal_arglist *f1, *f2; | |
1655 | |
1656 gcc_assert (name2 != NULL); | |
1657 | |
1658 if (s1->attr.function && (s2->attr.subroutine | |
1659 || (!s2->attr.function && s2->ts.type == BT_UNKNOWN | |
1660 && gfc_get_default_type (name2, s2->ns)->type == BT_UNKNOWN))) | |
1661 { | |
1662 if (errmsg != NULL) | |
1663 snprintf (errmsg, err_len, "'%s' is not a function", name2); | |
1664 return false; | |
1665 } | |
1666 | |
1667 if (s1->attr.subroutine && s2->attr.function) | |
1668 { | |
1669 if (errmsg != NULL) | |
1670 snprintf (errmsg, err_len, "'%s' is not a subroutine", name2); | |
1671 return false; | |
1672 } | |
1673 | |
1674 /* Do strict checks on all characteristics | |
1675 (for dummy procedures and procedure pointer assignments). */ | |
1676 if (!generic_flag && strict_flag) | |
1677 { | |
1678 if (s1->attr.function && s2->attr.function) | |
1679 { | |
1680 /* If both are functions, check result characteristics. */ | |
1681 if (!gfc_check_result_characteristics (s1, s2, errmsg, err_len) | |
1682 || !gfc_check_result_characteristics (s2, s1, errmsg, err_len)) | |
1683 return false; | |
1684 } | |
1685 | |
1686 if (s1->attr.pure && !s2->attr.pure) | |
1687 { | |
1688 snprintf (errmsg, err_len, "Mismatch in PURE attribute"); | |
1689 return false; | |
1690 } | |
1691 if (s1->attr.elemental && !s2->attr.elemental) | |
1692 { | |
1693 snprintf (errmsg, err_len, "Mismatch in ELEMENTAL attribute"); | |
1694 return false; | |
1695 } | |
1696 } | |
1697 | |
1698 if (s1->attr.if_source == IFSRC_UNKNOWN | |
1699 || s2->attr.if_source == IFSRC_UNKNOWN) | |
1700 return true; | |
1701 | |
1702 f1 = gfc_sym_get_dummy_args (s1); | |
1703 f2 = gfc_sym_get_dummy_args (s2); | |
1704 | |
1705 /* Special case: No arguments. */ | |
1706 if (f1 == NULL && f2 == NULL) | |
1707 return true; | |
1708 | |
1709 if (generic_flag) | |
1710 { | |
1711 if (count_types_test (f1, f2, p1, p2) | |
1712 || count_types_test (f2, f1, p2, p1)) | |
1713 return false; | |
1714 | |
1715 /* Special case: alternate returns. If both f1->sym and f2->sym are | |
1716 NULL, then the leading formal arguments are alternate returns. | |
1717 The previous conditional should catch argument lists with | |
1718 different number of argument. */ | |
1719 if (f1 && f1->sym == NULL && f2 && f2->sym == NULL) | |
1720 return true; | |
1721 | |
1722 if (generic_correspondence (f1, f2, p1, p2) | |
1723 || generic_correspondence (f2, f1, p2, p1)) | |
1724 return false; | |
1725 } | |
1726 else | |
1727 /* Perform the abbreviated correspondence test for operators (the | |
1728 arguments cannot be optional and are always ordered correctly). | |
1729 This is also done when comparing interfaces for dummy procedures and in | |
1730 procedure pointer assignments. */ | |
1731 | |
1732 for (; f1 || f2; f1 = f1->next, f2 = f2->next) | |
1733 { | |
1734 /* Check existence. */ | |
1735 if (f1 == NULL || f2 == NULL) | |
1736 { | |
1737 if (errmsg != NULL) | |
1738 snprintf (errmsg, err_len, "'%s' has the wrong number of " | |
1739 "arguments", name2); | |
1740 return false; | |
1741 } | |
1742 | |
1743 if (strict_flag) | |
1744 { | |
1745 /* Check all characteristics. */ | |
1746 if (!gfc_check_dummy_characteristics (f1->sym, f2->sym, true, | |
1747 errmsg, err_len)) | |
1748 return false; | |
1749 } | |
1750 else | |
1751 { | |
1752 /* Only check type and rank. */ | |
1753 if (!compare_type (f2->sym, f1->sym)) | |
1754 { | |
1755 if (errmsg != NULL) | |
1756 snprintf (errmsg, err_len, "Type mismatch in argument '%s' " | |
1757 "(%s/%s)", f1->sym->name, | |
1758 gfc_typename (&f1->sym->ts), | |
1759 gfc_typename (&f2->sym->ts)); | |
1760 return false; | |
1761 } | |
1762 if (!compare_rank (f2->sym, f1->sym)) | |
1763 { | |
1764 if (errmsg != NULL) | |
1765 snprintf (errmsg, err_len, "Rank mismatch in argument '%s' " | |
1766 "(%i/%i)", f1->sym->name, symbol_rank (f1->sym), | |
1767 symbol_rank (f2->sym)); | |
1768 return false; | |
1769 } | |
1770 } | |
1771 } | |
1772 | |
1773 return true; | |
1774 } | |
1775 | |
1776 | |
1777 /* Given a pointer to an interface pointer, remove duplicate | |
1778 interfaces and make sure that all symbols are either functions | |
1779 or subroutines, and all of the same kind. Returns true if | |
1780 something goes wrong. */ | |
1781 | |
1782 static bool | |
1783 check_interface0 (gfc_interface *p, const char *interface_name) | |
1784 { | |
1785 gfc_interface *psave, *q, *qlast; | |
1786 | |
1787 psave = p; | |
1788 for (; p; p = p->next) | |
1789 { | |
1790 /* Make sure all symbols in the interface have been defined as | |
1791 functions or subroutines. */ | |
1792 if (((!p->sym->attr.function && !p->sym->attr.subroutine) | |
1793 || !p->sym->attr.if_source) | |
1794 && !gfc_fl_struct (p->sym->attr.flavor)) | |
1795 { | |
1796 const char *guessed | |
1797 = gfc_lookup_function_fuzzy (p->sym->name, p->sym->ns->sym_root); | |
1798 | |
1799 if (p->sym->attr.external) | |
1800 if (guessed) | |
1801 gfc_error ("Procedure %qs in %s at %L has no explicit interface" | |
1802 "; did you mean %qs?", | |
1803 p->sym->name, interface_name, &p->sym->declared_at, | |
1804 guessed); | |
1805 else | |
1806 gfc_error ("Procedure %qs in %s at %L has no explicit interface", | |
1807 p->sym->name, interface_name, &p->sym->declared_at); | |
1808 else | |
1809 if (guessed) | |
1810 gfc_error ("Procedure %qs in %s at %L is neither function nor " | |
1811 "subroutine; did you mean %qs?", p->sym->name, | |
1812 interface_name, &p->sym->declared_at, guessed); | |
1813 else | |
1814 gfc_error ("Procedure %qs in %s at %L is neither function nor " | |
1815 "subroutine", p->sym->name, interface_name, | |
1816 &p->sym->declared_at); | |
1817 return true; | |
1818 } | |
1819 | |
1820 /* Verify that procedures are either all SUBROUTINEs or all FUNCTIONs. */ | |
1821 if ((psave->sym->attr.function && !p->sym->attr.function | |
1822 && !gfc_fl_struct (p->sym->attr.flavor)) | |
1823 || (psave->sym->attr.subroutine && !p->sym->attr.subroutine)) | |
1824 { | |
1825 if (!gfc_fl_struct (p->sym->attr.flavor)) | |
1826 gfc_error ("In %s at %L procedures must be either all SUBROUTINEs" | |
1827 " or all FUNCTIONs", interface_name, | |
1828 &p->sym->declared_at); | |
1829 else if (p->sym->attr.flavor == FL_DERIVED) | |
1830 gfc_error ("In %s at %L procedures must be all FUNCTIONs as the " | |
1831 "generic name is also the name of a derived type", | |
1832 interface_name, &p->sym->declared_at); | |
1833 return true; | |
1834 } | |
1835 | |
1836 /* F2003, C1207. F2008, C1207. */ | |
1837 if (p->sym->attr.proc == PROC_INTERNAL | |
1838 && !gfc_notify_std (GFC_STD_F2008, "Internal procedure " | |
1839 "%qs in %s at %L", p->sym->name, | |
1840 interface_name, &p->sym->declared_at)) | |
1841 return true; | |
1842 } | |
1843 p = psave; | |
1844 | |
1845 /* Remove duplicate interfaces in this interface list. */ | |
1846 for (; p; p = p->next) | |
1847 { | |
1848 qlast = p; | |
1849 | |
1850 for (q = p->next; q;) | |
1851 { | |
1852 if (p->sym != q->sym) | |
1853 { | |
1854 qlast = q; | |
1855 q = q->next; | |
1856 } | |
1857 else | |
1858 { | |
1859 /* Duplicate interface. */ | |
1860 qlast->next = q->next; | |
1861 free (q); | |
1862 q = qlast->next; | |
1863 } | |
1864 } | |
1865 } | |
1866 | |
1867 return false; | |
1868 } | |
1869 | |
1870 | |
1871 /* Check lists of interfaces to make sure that no two interfaces are | |
1872 ambiguous. Duplicate interfaces (from the same symbol) are OK here. */ | |
1873 | |
1874 static bool | |
1875 check_interface1 (gfc_interface *p, gfc_interface *q0, | |
1876 int generic_flag, const char *interface_name, | |
1877 bool referenced) | |
1878 { | |
1879 gfc_interface *q; | |
1880 for (; p; p = p->next) | |
1881 for (q = q0; q; q = q->next) | |
1882 { | |
1883 if (p->sym == q->sym) | |
1884 continue; /* Duplicates OK here. */ | |
1885 | |
1886 if (p->sym->name == q->sym->name && p->sym->module == q->sym->module) | |
1887 continue; | |
1888 | |
1889 if (!gfc_fl_struct (p->sym->attr.flavor) | |
1890 && !gfc_fl_struct (q->sym->attr.flavor) | |
1891 && gfc_compare_interfaces (p->sym, q->sym, q->sym->name, | |
1892 generic_flag, 0, NULL, 0, NULL, NULL)) | |
1893 { | |
1894 if (referenced) | |
1895 gfc_error ("Ambiguous interfaces in %s for %qs at %L " | |
1896 "and %qs at %L", interface_name, | |
1897 q->sym->name, &q->sym->declared_at, | |
1898 p->sym->name, &p->sym->declared_at); | |
1899 else if (!p->sym->attr.use_assoc && q->sym->attr.use_assoc) | |
1900 gfc_warning (0, "Ambiguous interfaces in %s for %qs at %L " | |
1901 "and %qs at %L", interface_name, | |
1902 q->sym->name, &q->sym->declared_at, | |
1903 p->sym->name, &p->sym->declared_at); | |
1904 else | |
1905 gfc_warning (0, "Although not referenced, %qs has ambiguous " | |
1906 "interfaces at %L", interface_name, &p->where); | |
1907 return true; | |
1908 } | |
1909 } | |
1910 return false; | |
1911 } | |
1912 | |
1913 | |
1914 /* Check the generic and operator interfaces of symbols to make sure | |
1915 that none of the interfaces conflict. The check has to be done | |
1916 after all of the symbols are actually loaded. */ | |
1917 | |
1918 static void | |
1919 check_sym_interfaces (gfc_symbol *sym) | |
1920 { | |
1921 char interface_name[GFC_MAX_SYMBOL_LEN + sizeof("generic interface ''")]; | |
1922 gfc_interface *p; | |
1923 | |
1924 if (sym->ns != gfc_current_ns) | |
1925 return; | |
1926 | |
1927 if (sym->generic != NULL) | |
1928 { | |
1929 sprintf (interface_name, "generic interface '%s'", sym->name); | |
1930 if (check_interface0 (sym->generic, interface_name)) | |
1931 return; | |
1932 | |
1933 for (p = sym->generic; p; p = p->next) | |
1934 { | |
1935 if (p->sym->attr.mod_proc | |
1936 && !p->sym->attr.module_procedure | |
1937 && (p->sym->attr.if_source != IFSRC_DECL | |
1938 || p->sym->attr.procedure)) | |
1939 { | |
1940 gfc_error ("%qs at %L is not a module procedure", | |
1941 p->sym->name, &p->where); | |
1942 return; | |
1943 } | |
1944 } | |
1945 | |
1946 /* Originally, this test was applied to host interfaces too; | |
1947 this is incorrect since host associated symbols, from any | |
1948 source, cannot be ambiguous with local symbols. */ | |
1949 check_interface1 (sym->generic, sym->generic, 1, interface_name, | |
1950 sym->attr.referenced || !sym->attr.use_assoc); | |
1951 } | |
1952 } | |
1953 | |
1954 | |
1955 static void | |
1956 check_uop_interfaces (gfc_user_op *uop) | |
1957 { | |
1958 char interface_name[GFC_MAX_SYMBOL_LEN + sizeof("operator interface ''")]; | |
1959 gfc_user_op *uop2; | |
1960 gfc_namespace *ns; | |
1961 | |
1962 sprintf (interface_name, "operator interface '%s'", uop->name); | |
1963 if (check_interface0 (uop->op, interface_name)) | |
1964 return; | |
1965 | |
1966 for (ns = gfc_current_ns; ns; ns = ns->parent) | |
1967 { | |
1968 uop2 = gfc_find_uop (uop->name, ns); | |
1969 if (uop2 == NULL) | |
1970 continue; | |
1971 | |
1972 check_interface1 (uop->op, uop2->op, 0, | |
1973 interface_name, true); | |
1974 } | |
1975 } | |
1976 | |
1977 /* Given an intrinsic op, return an equivalent op if one exists, | |
1978 or INTRINSIC_NONE otherwise. */ | |
1979 | |
1980 gfc_intrinsic_op | |
1981 gfc_equivalent_op (gfc_intrinsic_op op) | |
1982 { | |
1983 switch(op) | |
1984 { | |
1985 case INTRINSIC_EQ: | |
1986 return INTRINSIC_EQ_OS; | |
1987 | |
1988 case INTRINSIC_EQ_OS: | |
1989 return INTRINSIC_EQ; | |
1990 | |
1991 case INTRINSIC_NE: | |
1992 return INTRINSIC_NE_OS; | |
1993 | |
1994 case INTRINSIC_NE_OS: | |
1995 return INTRINSIC_NE; | |
1996 | |
1997 case INTRINSIC_GT: | |
1998 return INTRINSIC_GT_OS; | |
1999 | |
2000 case INTRINSIC_GT_OS: | |
2001 return INTRINSIC_GT; | |
2002 | |
2003 case INTRINSIC_GE: | |
2004 return INTRINSIC_GE_OS; | |
2005 | |
2006 case INTRINSIC_GE_OS: | |
2007 return INTRINSIC_GE; | |
2008 | |
2009 case INTRINSIC_LT: | |
2010 return INTRINSIC_LT_OS; | |
2011 | |
2012 case INTRINSIC_LT_OS: | |
2013 return INTRINSIC_LT; | |
2014 | |
2015 case INTRINSIC_LE: | |
2016 return INTRINSIC_LE_OS; | |
2017 | |
2018 case INTRINSIC_LE_OS: | |
2019 return INTRINSIC_LE; | |
2020 | |
2021 default: | |
2022 return INTRINSIC_NONE; | |
2023 } | |
2024 } | |
2025 | |
2026 /* For the namespace, check generic, user operator and intrinsic | |
2027 operator interfaces for consistency and to remove duplicate | |
2028 interfaces. We traverse the whole namespace, counting on the fact | |
2029 that most symbols will not have generic or operator interfaces. */ | |
2030 | |
2031 void | |
2032 gfc_check_interfaces (gfc_namespace *ns) | |
2033 { | |
2034 gfc_namespace *old_ns, *ns2; | |
2035 char interface_name[GFC_MAX_SYMBOL_LEN + sizeof("intrinsic '' operator")]; | |
2036 int i; | |
2037 | |
2038 old_ns = gfc_current_ns; | |
2039 gfc_current_ns = ns; | |
2040 | |
2041 gfc_traverse_ns (ns, check_sym_interfaces); | |
2042 | |
2043 gfc_traverse_user_op (ns, check_uop_interfaces); | |
2044 | |
2045 for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++) | |
2046 { | |
2047 if (i == INTRINSIC_USER) | |
2048 continue; | |
2049 | |
2050 if (i == INTRINSIC_ASSIGN) | |
2051 strcpy (interface_name, "intrinsic assignment operator"); | |
2052 else | |
2053 sprintf (interface_name, "intrinsic '%s' operator", | |
2054 gfc_op2string ((gfc_intrinsic_op) i)); | |
2055 | |
2056 if (check_interface0 (ns->op[i], interface_name)) | |
2057 continue; | |
2058 | |
2059 if (ns->op[i]) | |
2060 gfc_check_operator_interface (ns->op[i]->sym, (gfc_intrinsic_op) i, | |
2061 ns->op[i]->where); | |
2062 | |
2063 for (ns2 = ns; ns2; ns2 = ns2->parent) | |
2064 { | |
2065 gfc_intrinsic_op other_op; | |
2066 | |
2067 if (check_interface1 (ns->op[i], ns2->op[i], 0, | |
2068 interface_name, true)) | |
2069 goto done; | |
2070 | |
2071 /* i should be gfc_intrinsic_op, but has to be int with this cast | |
2072 here for stupid C++ compatibility rules. */ | |
2073 other_op = gfc_equivalent_op ((gfc_intrinsic_op) i); | |
2074 if (other_op != INTRINSIC_NONE | |
2075 && check_interface1 (ns->op[i], ns2->op[other_op], | |
2076 0, interface_name, true)) | |
2077 goto done; | |
2078 } | |
2079 } | |
2080 | |
2081 done: | |
2082 gfc_current_ns = old_ns; | |
2083 } | |
2084 | |
2085 | |
2086 /* Given a symbol of a formal argument list and an expression, if the | |
2087 formal argument is allocatable, check that the actual argument is | |
2088 allocatable. Returns true if compatible, zero if not compatible. */ | |
2089 | |
2090 static bool | |
2091 compare_allocatable (gfc_symbol *formal, gfc_expr *actual) | |
2092 { | |
2093 if (formal->attr.allocatable | |
2094 || (formal->ts.type == BT_CLASS && CLASS_DATA (formal)->attr.allocatable)) | |
2095 { | |
2096 symbol_attribute attr = gfc_expr_attr (actual); | |
2097 if (actual->ts.type == BT_CLASS && !attr.class_ok) | |
2098 return true; | |
2099 else if (!attr.allocatable) | |
2100 return false; | |
2101 } | |
2102 | |
2103 return true; | |
2104 } | |
2105 | |
2106 | |
2107 /* Given a symbol of a formal argument list and an expression, if the | |
2108 formal argument is a pointer, see if the actual argument is a | |
2109 pointer. Returns nonzero if compatible, zero if not compatible. */ | |
2110 | |
2111 static int | |
2112 compare_pointer (gfc_symbol *formal, gfc_expr *actual) | |
2113 { | |
2114 symbol_attribute attr; | |
2115 | |
2116 if (formal->attr.pointer | |
2117 || (formal->ts.type == BT_CLASS && CLASS_DATA (formal) | |
2118 && CLASS_DATA (formal)->attr.class_pointer)) | |
2119 { | |
2120 attr = gfc_expr_attr (actual); | |
2121 | |
2122 /* Fortran 2008 allows non-pointer actual arguments. */ | |
2123 if (!attr.pointer && attr.target && formal->attr.intent == INTENT_IN) | |
2124 return 2; | |
2125 | |
2126 if (!attr.pointer) | |
2127 return 0; | |
2128 } | |
2129 | |
2130 return 1; | |
2131 } | |
2132 | |
2133 | |
2134 /* Emit clear error messages for rank mismatch. */ | |
2135 | |
2136 static void | |
2137 argument_rank_mismatch (const char *name, locus *where, | |
2138 int rank1, int rank2) | |
2139 { | |
2140 | |
2141 /* TS 29113, C407b. */ | |
2142 if (rank2 == -1) | |
2143 gfc_error ("The assumed-rank array at %L requires that the dummy argument" | |
2144 " %qs has assumed-rank", where, name); | |
2145 else if (rank1 == 0) | |
2146 gfc_error_opt (OPT_Wargument_mismatch, "Rank mismatch in argument %qs " | |
2147 "at %L (scalar and rank-%d)", name, where, rank2); | |
2148 else if (rank2 == 0) | |
2149 gfc_error_opt (OPT_Wargument_mismatch, "Rank mismatch in argument %qs " | |
2150 "at %L (rank-%d and scalar)", name, where, rank1); | |
2151 else | |
2152 gfc_error_opt (OPT_Wargument_mismatch, "Rank mismatch in argument %qs " | |
2153 "at %L (rank-%d and rank-%d)", name, where, rank1, rank2); | |
2154 } | |
2155 | |
2156 | |
2157 /* Given a symbol of a formal argument list and an expression, see if | |
2158 the two are compatible as arguments. Returns true if | |
2159 compatible, false if not compatible. */ | |
2160 | |
2161 static bool | |
2162 compare_parameter (gfc_symbol *formal, gfc_expr *actual, | |
2163 int ranks_must_agree, int is_elemental, locus *where) | |
2164 { | |
2165 gfc_ref *ref; | |
2166 bool rank_check, is_pointer; | |
2167 char err[200]; | |
2168 gfc_component *ppc; | |
2169 | |
2170 /* If the formal arg has type BT_VOID, it's to one of the iso_c_binding | |
2171 procs c_f_pointer or c_f_procpointer, and we need to accept most | |
2172 pointers the user could give us. This should allow that. */ | |
2173 if (formal->ts.type == BT_VOID) | |
2174 return true; | |
2175 | |
2176 if (formal->ts.type == BT_DERIVED | |
2177 && formal->ts.u.derived && formal->ts.u.derived->ts.is_iso_c | |
2178 && actual->ts.type == BT_DERIVED | |
2179 && actual->ts.u.derived && actual->ts.u.derived->ts.is_iso_c) | |
2180 return true; | |
2181 | |
2182 if (formal->ts.type == BT_CLASS && actual->ts.type == BT_DERIVED) | |
2183 /* Make sure the vtab symbol is present when | |
2184 the module variables are generated. */ | |
2185 gfc_find_derived_vtab (actual->ts.u.derived); | |
2186 | |
2187 if (actual->ts.type == BT_PROCEDURE) | |
2188 { | |
2189 gfc_symbol *act_sym = actual->symtree->n.sym; | |
2190 | |
2191 if (formal->attr.flavor != FL_PROCEDURE) | |
2192 { | |
2193 if (where) | |
2194 gfc_error ("Invalid procedure argument at %L", &actual->where); | |
2195 return false; | |
2196 } | |
2197 | |
2198 if (!gfc_compare_interfaces (formal, act_sym, act_sym->name, 0, 1, err, | |
2199 sizeof(err), NULL, NULL)) | |
2200 { | |
2201 if (where) | |
2202 gfc_error_opt (OPT_Wargument_mismatch, | |
2203 "Interface mismatch in dummy procedure %qs at %L:" | |
2204 " %s", formal->name, &actual->where, err); | |
2205 return false; | |
2206 } | |
2207 | |
2208 if (formal->attr.function && !act_sym->attr.function) | |
2209 { | |
2210 gfc_add_function (&act_sym->attr, act_sym->name, | |
2211 &act_sym->declared_at); | |
2212 if (act_sym->ts.type == BT_UNKNOWN | |
2213 && !gfc_set_default_type (act_sym, 1, act_sym->ns)) | |
2214 return false; | |
2215 } | |
2216 else if (formal->attr.subroutine && !act_sym->attr.subroutine) | |
2217 gfc_add_subroutine (&act_sym->attr, act_sym->name, | |
2218 &act_sym->declared_at); | |
2219 | |
2220 return true; | |
2221 } | |
2222 | |
2223 ppc = gfc_get_proc_ptr_comp (actual); | |
2224 if (ppc && ppc->ts.interface) | |
2225 { | |
2226 if (!gfc_compare_interfaces (formal, ppc->ts.interface, ppc->name, 0, 1, | |
2227 err, sizeof(err), NULL, NULL)) | |
2228 { | |
2229 if (where) | |
2230 gfc_error_opt (OPT_Wargument_mismatch, | |
2231 "Interface mismatch in dummy procedure %qs at %L:" | |
2232 " %s", formal->name, &actual->where, err); | |
2233 return false; | |
2234 } | |
2235 } | |
2236 | |
2237 /* F2008, C1241. */ | |
2238 if (formal->attr.pointer && formal->attr.contiguous | |
2239 && !gfc_is_simply_contiguous (actual, true, false)) | |
2240 { | |
2241 if (where) | |
2242 gfc_error ("Actual argument to contiguous pointer dummy %qs at %L " | |
2243 "must be simply contiguous", formal->name, &actual->where); | |
2244 return false; | |
2245 } | |
2246 | |
2247 symbol_attribute actual_attr = gfc_expr_attr (actual); | |
2248 if (actual->ts.type == BT_CLASS && !actual_attr.class_ok) | |
2249 return true; | |
2250 | |
2251 if ((actual->expr_type != EXPR_NULL || actual->ts.type != BT_UNKNOWN) | |
2252 && actual->ts.type != BT_HOLLERITH | |
2253 && formal->ts.type != BT_ASSUMED | |
2254 && !(formal->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK)) | |
2255 && !gfc_compare_types (&formal->ts, &actual->ts) | |
2256 && !(formal->ts.type == BT_DERIVED && actual->ts.type == BT_CLASS | |
2257 && gfc_compare_derived_types (formal->ts.u.derived, | |
2258 CLASS_DATA (actual)->ts.u.derived))) | |
2259 { | |
2260 if (where) | |
2261 gfc_error_opt (OPT_Wargument_mismatch, | |
2262 "Type mismatch in argument %qs at %L; passed %s to %s", | |
2263 formal->name, where, gfc_typename (&actual->ts), | |
2264 gfc_typename (&formal->ts)); | |
2265 return false; | |
2266 } | |
2267 | |
2268 if (actual->ts.type == BT_ASSUMED && formal->ts.type != BT_ASSUMED) | |
2269 { | |
2270 if (where) | |
2271 gfc_error ("Assumed-type actual argument at %L requires that dummy " | |
2272 "argument %qs is of assumed type", &actual->where, | |
2273 formal->name); | |
2274 return false; | |
2275 } | |
2276 | |
2277 /* F2008, 12.5.2.5; IR F08/0073. */ | |
2278 if (formal->ts.type == BT_CLASS && formal->attr.class_ok | |
2279 && actual->expr_type != EXPR_NULL | |
2280 && ((CLASS_DATA (formal)->attr.class_pointer | |
2281 && formal->attr.intent != INTENT_IN) | |
2282 || CLASS_DATA (formal)->attr.allocatable)) | |
2283 { | |
2284 if (actual->ts.type != BT_CLASS) | |
2285 { | |
2286 if (where) | |
2287 gfc_error ("Actual argument to %qs at %L must be polymorphic", | |
2288 formal->name, &actual->where); | |
2289 return false; | |
2290 } | |
2291 | |
2292 if ((!UNLIMITED_POLY (formal) || !UNLIMITED_POLY(actual)) | |
2293 && !gfc_compare_derived_types (CLASS_DATA (actual)->ts.u.derived, | |
2294 CLASS_DATA (formal)->ts.u.derived)) | |
2295 { | |
2296 if (where) | |
2297 gfc_error ("Actual argument to %qs at %L must have the same " | |
2298 "declared type", formal->name, &actual->where); | |
2299 return false; | |
2300 } | |
2301 } | |
2302 | |
2303 /* F08: 12.5.2.5 Allocatable and pointer dummy variables. However, this | |
2304 is necessary also for F03, so retain error for both. | |
2305 NOTE: Other type/kind errors pre-empt this error. Since they are F03 | |
2306 compatible, no attempt has been made to channel to this one. */ | |
2307 if (UNLIMITED_POLY (formal) && !UNLIMITED_POLY (actual) | |
2308 && (CLASS_DATA (formal)->attr.allocatable | |
2309 ||CLASS_DATA (formal)->attr.class_pointer)) | |
2310 { | |
2311 if (where) | |
2312 gfc_error ("Actual argument to %qs at %L must be unlimited " | |
2313 "polymorphic since the formal argument is a " | |
2314 "pointer or allocatable unlimited polymorphic " | |
2315 "entity [F2008: 12.5.2.5]", formal->name, | |
2316 &actual->where); | |
2317 return false; | |
2318 } | |
2319 | |
2320 if (formal->attr.codimension && !gfc_is_coarray (actual)) | |
2321 { | |
2322 if (where) | |
2323 gfc_error ("Actual argument to %qs at %L must be a coarray", | |
2324 formal->name, &actual->where); | |
2325 return false; | |
2326 } | |
2327 | |
2328 if (formal->attr.codimension && formal->attr.allocatable) | |
2329 { | |
2330 gfc_ref *last = NULL; | |
2331 | |
2332 for (ref = actual->ref; ref; ref = ref->next) | |
2333 if (ref->type == REF_COMPONENT) | |
2334 last = ref; | |
2335 | |
2336 /* F2008, 12.5.2.6. */ | |
2337 if ((last && last->u.c.component->as->corank != formal->as->corank) | |
2338 || (!last | |
2339 && actual->symtree->n.sym->as->corank != formal->as->corank)) | |
2340 { | |
2341 if (where) | |
2342 gfc_error ("Corank mismatch in argument %qs at %L (%d and %d)", | |
2343 formal->name, &actual->where, formal->as->corank, | |
2344 last ? last->u.c.component->as->corank | |
2345 : actual->symtree->n.sym->as->corank); | |
2346 return false; | |
2347 } | |
2348 } | |
2349 | |
2350 if (formal->attr.codimension) | |
2351 { | |
2352 /* F2008, 12.5.2.8 + Corrig 2 (IR F08/0048). */ | |
2353 /* F2015, 12.5.2.8. */ | |
2354 if (formal->attr.dimension | |
2355 && (formal->attr.contiguous || formal->as->type != AS_ASSUMED_SHAPE) | |
2356 && actual_attr.dimension | |
2357 && !gfc_is_simply_contiguous (actual, true, true)) | |
2358 { | |
2359 if (where) | |
2360 gfc_error ("Actual argument to %qs at %L must be simply " | |
2361 "contiguous or an element of such an array", | |
2362 formal->name, &actual->where); | |
2363 return false; | |
2364 } | |
2365 | |
2366 /* F2008, C1303 and C1304. */ | |
2367 if (formal->attr.intent != INTENT_INOUT | |
2368 && (((formal->ts.type == BT_DERIVED || formal->ts.type == BT_CLASS) | |
2369 && formal->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV | |
2370 && formal->ts.u.derived->intmod_sym_id == ISOFORTRAN_LOCK_TYPE) | |
2371 || formal->attr.lock_comp)) | |
2372 | |
2373 { | |
2374 if (where) | |
2375 gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, " | |
2376 "which is LOCK_TYPE or has a LOCK_TYPE component", | |
2377 formal->name, &actual->where); | |
2378 return false; | |
2379 } | |
2380 | |
2381 /* TS18508, C702/C703. */ | |
2382 if (formal->attr.intent != INTENT_INOUT | |
2383 && (((formal->ts.type == BT_DERIVED || formal->ts.type == BT_CLASS) | |
2384 && formal->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV | |
2385 && formal->ts.u.derived->intmod_sym_id == ISOFORTRAN_EVENT_TYPE) | |
2386 || formal->attr.event_comp)) | |
2387 | |
2388 { | |
2389 if (where) | |
2390 gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, " | |
2391 "which is EVENT_TYPE or has a EVENT_TYPE component", | |
2392 formal->name, &actual->where); | |
2393 return false; | |
2394 } | |
2395 } | |
2396 | |
2397 /* F2008, C1239/C1240. */ | |
2398 if (actual->expr_type == EXPR_VARIABLE | |
2399 && (actual->symtree->n.sym->attr.asynchronous | |
2400 || actual->symtree->n.sym->attr.volatile_) | |
2401 && (formal->attr.asynchronous || formal->attr.volatile_) | |
2402 && actual->rank && formal->as | |
2403 && !gfc_is_simply_contiguous (actual, true, false) | |
2404 && ((formal->as->type != AS_ASSUMED_SHAPE | |
2405 && formal->as->type != AS_ASSUMED_RANK && !formal->attr.pointer) | |
2406 || formal->attr.contiguous)) | |
2407 { | |
2408 if (where) | |
2409 gfc_error ("Dummy argument %qs has to be a pointer, assumed-shape or " | |
2410 "assumed-rank array without CONTIGUOUS attribute - as actual" | |
2411 " argument at %L is not simply contiguous and both are " | |
2412 "ASYNCHRONOUS or VOLATILE", formal->name, &actual->where); | |
2413 return false; | |
2414 } | |
2415 | |
2416 if (formal->attr.allocatable && !formal->attr.codimension | |
2417 && actual_attr.codimension) | |
2418 { | |
2419 if (formal->attr.intent == INTENT_OUT) | |
2420 { | |
2421 if (where) | |
2422 gfc_error ("Passing coarray at %L to allocatable, noncoarray, " | |
2423 "INTENT(OUT) dummy argument %qs", &actual->where, | |
2424 formal->name); | |
2425 return false; | |
2426 } | |
2427 else if (warn_surprising && where && formal->attr.intent != INTENT_IN) | |
2428 gfc_warning (OPT_Wsurprising, | |
2429 "Passing coarray at %L to allocatable, noncoarray dummy " | |
2430 "argument %qs, which is invalid if the allocation status" | |
2431 " is modified", &actual->where, formal->name); | |
2432 } | |
2433 | |
2434 /* If the rank is the same or the formal argument has assumed-rank. */ | |
2435 if (symbol_rank (formal) == actual->rank || symbol_rank (formal) == -1) | |
2436 return true; | |
2437 | |
2438 rank_check = where != NULL && !is_elemental && formal->as | |
2439 && (formal->as->type == AS_ASSUMED_SHAPE | |
2440 || formal->as->type == AS_DEFERRED) | |
2441 && actual->expr_type != EXPR_NULL; | |
2442 | |
2443 /* Skip rank checks for NO_ARG_CHECK. */ | |
2444 if (formal->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK)) | |
2445 return true; | |
2446 | |
2447 /* Scalar & coindexed, see: F2008, Section 12.5.2.4. */ | |
2448 if (rank_check || ranks_must_agree | |
2449 || (formal->attr.pointer && actual->expr_type != EXPR_NULL) | |
2450 || (actual->rank != 0 && !(is_elemental || formal->attr.dimension)) | |
2451 || (actual->rank == 0 | |
2452 && ((formal->ts.type == BT_CLASS | |
2453 && CLASS_DATA (formal)->as->type == AS_ASSUMED_SHAPE) | |
2454 || (formal->ts.type != BT_CLASS | |
2455 && formal->as->type == AS_ASSUMED_SHAPE)) | |
2456 && actual->expr_type != EXPR_NULL) | |
2457 || (actual->rank == 0 && formal->attr.dimension | |
2458 && gfc_is_coindexed (actual))) | |
2459 { | |
2460 if (where) | |
2461 argument_rank_mismatch (formal->name, &actual->where, | |
2462 symbol_rank (formal), actual->rank); | |
2463 return false; | |
2464 } | |
2465 else if (actual->rank != 0 && (is_elemental || formal->attr.dimension)) | |
2466 return true; | |
2467 | |
2468 /* At this point, we are considering a scalar passed to an array. This | |
2469 is valid (cf. F95 12.4.1.1, F2003 12.4.1.2, and F2008 12.5.2.4), | |
2470 - if the actual argument is (a substring of) an element of a | |
2471 non-assumed-shape/non-pointer/non-polymorphic array; or | |
2472 - (F2003) if the actual argument is of type character of default/c_char | |
2473 kind. */ | |
2474 | |
2475 is_pointer = actual->expr_type == EXPR_VARIABLE | |
2476 ? actual->symtree->n.sym->attr.pointer : false; | |
2477 | |
2478 for (ref = actual->ref; ref; ref = ref->next) | |
2479 { | |
2480 if (ref->type == REF_COMPONENT) | |
2481 is_pointer = ref->u.c.component->attr.pointer; | |
2482 else if (ref->type == REF_ARRAY && ref->u.ar.type == AR_ELEMENT | |
2483 && ref->u.ar.dimen > 0 | |
2484 && (!ref->next | |
2485 || (ref->next->type == REF_SUBSTRING && !ref->next->next))) | |
2486 break; | |
2487 } | |
2488 | |
2489 if (actual->ts.type == BT_CLASS && actual->expr_type != EXPR_NULL) | |
2490 { | |
2491 if (where) | |
2492 gfc_error ("Polymorphic scalar passed to array dummy argument %qs " | |
2493 "at %L", formal->name, &actual->where); | |
2494 return false; | |
2495 } | |
2496 | |
2497 if (actual->expr_type != EXPR_NULL && ref && actual->ts.type != BT_CHARACTER | |
2498 && (is_pointer || ref->u.ar.as->type == AS_ASSUMED_SHAPE)) | |
2499 { | |
2500 if (where) | |
2501 gfc_error ("Element of assumed-shaped or pointer " | |
2502 "array passed to array dummy argument %qs at %L", | |
2503 formal->name, &actual->where); | |
2504 return false; | |
2505 } | |
2506 | |
2507 if (actual->ts.type == BT_CHARACTER && actual->expr_type != EXPR_NULL | |
2508 && (!ref || is_pointer || ref->u.ar.as->type == AS_ASSUMED_SHAPE)) | |
2509 { | |
2510 if (formal->ts.kind != 1 && (gfc_option.allow_std & GFC_STD_GNU) == 0) | |
2511 { | |
2512 if (where) | |
2513 gfc_error ("Extension: Scalar non-default-kind, non-C_CHAR-kind " | |
2514 "CHARACTER actual argument with array dummy argument " | |
2515 "%qs at %L", formal->name, &actual->where); | |
2516 return false; | |
2517 } | |
2518 | |
2519 if (where && (gfc_option.allow_std & GFC_STD_F2003) == 0) | |
2520 { | |
2521 gfc_error ("Fortran 2003: Scalar CHARACTER actual argument with " | |
2522 "array dummy argument %qs at %L", | |
2523 formal->name, &actual->where); | |
2524 return false; | |
2525 } | |
2526 else | |
2527 return ((gfc_option.allow_std & GFC_STD_F2003) != 0); | |
2528 } | |
2529 | |
2530 if (ref == NULL && actual->expr_type != EXPR_NULL) | |
2531 { | |
2532 if (where) | |
2533 argument_rank_mismatch (formal->name, &actual->where, | |
2534 symbol_rank (formal), actual->rank); | |
2535 return false; | |
2536 } | |
2537 | |
2538 return true; | |
2539 } | |
2540 | |
2541 | |
2542 /* Returns the storage size of a symbol (formal argument) or | |
2543 zero if it cannot be determined. */ | |
2544 | |
2545 static unsigned long | |
2546 get_sym_storage_size (gfc_symbol *sym) | |
2547 { | |
2548 int i; | |
2549 unsigned long strlen, elements; | |
2550 | |
2551 if (sym->ts.type == BT_CHARACTER) | |
2552 { | |
2553 if (sym->ts.u.cl && sym->ts.u.cl->length | |
2554 && sym->ts.u.cl->length->expr_type == EXPR_CONSTANT) | |
2555 strlen = mpz_get_ui (sym->ts.u.cl->length->value.integer); | |
2556 else | |
2557 return 0; | |
2558 } | |
2559 else | |
2560 strlen = 1; | |
2561 | |
2562 if (symbol_rank (sym) == 0) | |
2563 return strlen; | |
2564 | |
2565 elements = 1; | |
2566 if (sym->as->type != AS_EXPLICIT) | |
2567 return 0; | |
2568 for (i = 0; i < sym->as->rank; i++) | |
2569 { | |
2570 if (sym->as->upper[i]->expr_type != EXPR_CONSTANT | |
2571 || sym->as->lower[i]->expr_type != EXPR_CONSTANT) | |
2572 return 0; | |
2573 | |
2574 elements *= mpz_get_si (sym->as->upper[i]->value.integer) | |
2575 - mpz_get_si (sym->as->lower[i]->value.integer) + 1L; | |
2576 } | |
2577 | |
2578 return strlen*elements; | |
2579 } | |
2580 | |
2581 | |
2582 /* Returns the storage size of an expression (actual argument) or | |
2583 zero if it cannot be determined. For an array element, it returns | |
2584 the remaining size as the element sequence consists of all storage | |
2585 units of the actual argument up to the end of the array. */ | |
2586 | |
2587 static unsigned long | |
2588 get_expr_storage_size (gfc_expr *e) | |
2589 { | |
2590 int i; | |
2591 long int strlen, elements; | |
2592 long int substrlen = 0; | |
2593 bool is_str_storage = false; | |
2594 gfc_ref *ref; | |
2595 | |
2596 if (e == NULL) | |
2597 return 0; | |
2598 | |
2599 if (e->ts.type == BT_CHARACTER) | |
2600 { | |
2601 if (e->ts.u.cl && e->ts.u.cl->length | |
2602 && e->ts.u.cl->length->expr_type == EXPR_CONSTANT) | |
2603 strlen = mpz_get_si (e->ts.u.cl->length->value.integer); | |
2604 else if (e->expr_type == EXPR_CONSTANT | |
2605 && (e->ts.u.cl == NULL || e->ts.u.cl->length == NULL)) | |
2606 strlen = e->value.character.length; | |
2607 else | |
2608 return 0; | |
2609 } | |
2610 else | |
2611 strlen = 1; /* Length per element. */ | |
2612 | |
2613 if (e->rank == 0 && !e->ref) | |
2614 return strlen; | |
2615 | |
2616 elements = 1; | |
2617 if (!e->ref) | |
2618 { | |
2619 if (!e->shape) | |
2620 return 0; | |
2621 for (i = 0; i < e->rank; i++) | |
2622 elements *= mpz_get_si (e->shape[i]); | |
2623 return elements*strlen; | |
2624 } | |
2625 | |
2626 for (ref = e->ref; ref; ref = ref->next) | |
2627 { | |
2628 if (ref->type == REF_SUBSTRING && ref->u.ss.start | |
2629 && ref->u.ss.start->expr_type == EXPR_CONSTANT) | |
2630 { | |
2631 if (is_str_storage) | |
2632 { | |
2633 /* The string length is the substring length. | |
2634 Set now to full string length. */ | |
2635 if (!ref->u.ss.length || !ref->u.ss.length->length | |
2636 || ref->u.ss.length->length->expr_type != EXPR_CONSTANT) | |
2637 return 0; | |
2638 | |
2639 strlen = mpz_get_ui (ref->u.ss.length->length->value.integer); | |
2640 } | |
2641 substrlen = strlen - mpz_get_ui (ref->u.ss.start->value.integer) + 1; | |
2642 continue; | |
2643 } | |
2644 | |
2645 if (ref->type == REF_ARRAY && ref->u.ar.type == AR_SECTION) | |
2646 for (i = 0; i < ref->u.ar.dimen; i++) | |
2647 { | |
2648 long int start, end, stride; | |
2649 stride = 1; | |
2650 | |
2651 if (ref->u.ar.stride[i]) | |
2652 { | |
2653 if (ref->u.ar.stride[i]->expr_type == EXPR_CONSTANT) | |
2654 stride = mpz_get_si (ref->u.ar.stride[i]->value.integer); | |
2655 else | |
2656 return 0; | |
2657 } | |
2658 | |
2659 if (ref->u.ar.start[i]) | |
2660 { | |
2661 if (ref->u.ar.start[i]->expr_type == EXPR_CONSTANT) | |
2662 start = mpz_get_si (ref->u.ar.start[i]->value.integer); | |
2663 else | |
2664 return 0; | |
2665 } | |
2666 else if (ref->u.ar.as->lower[i] | |
2667 && ref->u.ar.as->lower[i]->expr_type == EXPR_CONSTANT) | |
2668 start = mpz_get_si (ref->u.ar.as->lower[i]->value.integer); | |
2669 else | |
2670 return 0; | |
2671 | |
2672 if (ref->u.ar.end[i]) | |
2673 { | |
2674 if (ref->u.ar.end[i]->expr_type == EXPR_CONSTANT) | |
2675 end = mpz_get_si (ref->u.ar.end[i]->value.integer); | |
2676 else | |
2677 return 0; | |
2678 } | |
2679 else if (ref->u.ar.as->upper[i] | |
2680 && ref->u.ar.as->upper[i]->expr_type == EXPR_CONSTANT) | |
2681 end = mpz_get_si (ref->u.ar.as->upper[i]->value.integer); | |
2682 else | |
2683 return 0; | |
2684 | |
2685 elements *= (end - start)/stride + 1L; | |
2686 } | |
2687 else if (ref->type == REF_ARRAY && ref->u.ar.type == AR_FULL) | |
2688 for (i = 0; i < ref->u.ar.as->rank; i++) | |
2689 { | |
2690 if (ref->u.ar.as->lower[i] && ref->u.ar.as->upper[i] | |
2691 && ref->u.ar.as->lower[i]->expr_type == EXPR_CONSTANT | |
2692 && ref->u.ar.as->lower[i]->ts.type == BT_INTEGER | |
2693 && ref->u.ar.as->upper[i]->expr_type == EXPR_CONSTANT | |
2694 && ref->u.ar.as->upper[i]->ts.type == BT_INTEGER) | |
2695 elements *= mpz_get_si (ref->u.ar.as->upper[i]->value.integer) | |
2696 - mpz_get_si (ref->u.ar.as->lower[i]->value.integer) | |
2697 + 1L; | |
2698 else | |
2699 return 0; | |
2700 } | |
2701 else if (ref->type == REF_ARRAY && ref->u.ar.type == AR_ELEMENT | |
2702 && e->expr_type == EXPR_VARIABLE) | |
2703 { | |
2704 if (ref->u.ar.as->type == AS_ASSUMED_SHAPE | |
2705 || e->symtree->n.sym->attr.pointer) | |
2706 { | |
2707 elements = 1; | |
2708 continue; | |
2709 } | |
2710 | |
2711 /* Determine the number of remaining elements in the element | |
2712 sequence for array element designators. */ | |
2713 is_str_storage = true; | |
2714 for (i = ref->u.ar.dimen - 1; i >= 0; i--) | |
2715 { | |
2716 if (ref->u.ar.start[i] == NULL | |
2717 || ref->u.ar.start[i]->expr_type != EXPR_CONSTANT | |
2718 || ref->u.ar.as->upper[i] == NULL | |
2719 || ref->u.ar.as->lower[i] == NULL | |
2720 || ref->u.ar.as->upper[i]->expr_type != EXPR_CONSTANT | |
2721 || ref->u.ar.as->lower[i]->expr_type != EXPR_CONSTANT) | |
2722 return 0; | |
2723 | |
2724 elements | |
2725 = elements | |
2726 * (mpz_get_si (ref->u.ar.as->upper[i]->value.integer) | |
2727 - mpz_get_si (ref->u.ar.as->lower[i]->value.integer) | |
2728 + 1L) | |
2729 - (mpz_get_si (ref->u.ar.start[i]->value.integer) | |
2730 - mpz_get_si (ref->u.ar.as->lower[i]->value.integer)); | |
2731 } | |
2732 } | |
2733 else if (ref->type == REF_COMPONENT && ref->u.c.component->attr.function | |
2734 && ref->u.c.component->attr.proc_pointer | |
2735 && ref->u.c.component->attr.dimension) | |
2736 { | |
2737 /* Array-valued procedure-pointer components. */ | |
2738 gfc_array_spec *as = ref->u.c.component->as; | |
2739 for (i = 0; i < as->rank; i++) | |
2740 { | |
2741 if (!as->upper[i] || !as->lower[i] | |
2742 || as->upper[i]->expr_type != EXPR_CONSTANT | |
2743 || as->lower[i]->expr_type != EXPR_CONSTANT) | |
2744 return 0; | |
2745 | |
2746 elements = elements | |
2747 * (mpz_get_si (as->upper[i]->value.integer) | |
2748 - mpz_get_si (as->lower[i]->value.integer) + 1L); | |
2749 } | |
2750 } | |
2751 } | |
2752 | |
2753 if (substrlen) | |
2754 return (is_str_storage) ? substrlen + (elements-1)*strlen | |
2755 : elements*strlen; | |
2756 else | |
2757 return elements*strlen; | |
2758 } | |
2759 | |
2760 | |
2761 /* Given an expression, check whether it is an array section | |
2762 which has a vector subscript. */ | |
2763 | |
2764 bool | |
2765 gfc_has_vector_subscript (gfc_expr *e) | |
2766 { | |
2767 int i; | |
2768 gfc_ref *ref; | |
2769 | |
2770 if (e == NULL || e->rank == 0 || e->expr_type != EXPR_VARIABLE) | |
2771 return false; | |
2772 | |
2773 for (ref = e->ref; ref; ref = ref->next) | |
2774 if (ref->type == REF_ARRAY && ref->u.ar.type == AR_SECTION) | |
2775 for (i = 0; i < ref->u.ar.dimen; i++) | |
2776 if (ref->u.ar.dimen_type[i] == DIMEN_VECTOR) | |
2777 return true; | |
2778 | |
2779 return false; | |
2780 } | |
2781 | |
2782 | |
2783 static bool | |
2784 is_procptr_result (gfc_expr *expr) | |
2785 { | |
2786 gfc_component *c = gfc_get_proc_ptr_comp (expr); | |
2787 if (c) | |
2788 return (c->ts.interface && (c->ts.interface->attr.proc_pointer == 1)); | |
2789 else | |
2790 return ((expr->symtree->n.sym->result != expr->symtree->n.sym) | |
2791 && (expr->symtree->n.sym->result->attr.proc_pointer == 1)); | |
2792 } | |
2793 | |
2794 | |
2795 /* Recursively append candidate argument ARG to CANDIDATES. Store the | |
2796 number of total candidates in CANDIDATES_LEN. */ | |
2797 | |
2798 static void | |
2799 lookup_arg_fuzzy_find_candidates (gfc_formal_arglist *arg, | |
2800 char **&candidates, | |
2801 size_t &candidates_len) | |
2802 { | |
2803 for (gfc_formal_arglist *p = arg; p && p->sym; p = p->next) | |
2804 vec_push (candidates, candidates_len, p->sym->name); | |
2805 } | |
2806 | |
2807 | |
2808 /* Lookup argument ARG fuzzily, taking names in ARGUMENTS into account. */ | |
2809 | |
2810 static const char* | |
2811 lookup_arg_fuzzy (const char *arg, gfc_formal_arglist *arguments) | |
2812 { | |
2813 char **candidates = NULL; | |
2814 size_t candidates_len = 0; | |
2815 lookup_arg_fuzzy_find_candidates (arguments, candidates, candidates_len); | |
2816 return gfc_closest_fuzzy_match (arg, candidates); | |
2817 } | |
2818 | |
2819 | |
2820 /* Given formal and actual argument lists, see if they are compatible. | |
2821 If they are compatible, the actual argument list is sorted to | |
2822 correspond with the formal list, and elements for missing optional | |
2823 arguments are inserted. If WHERE pointer is nonnull, then we issue | |
2824 errors when things don't match instead of just returning the status | |
2825 code. */ | |
2826 | |
2827 static bool | |
2828 compare_actual_formal (gfc_actual_arglist **ap, gfc_formal_arglist *formal, | |
2829 int ranks_must_agree, int is_elemental, locus *where) | |
2830 { | |
2831 gfc_actual_arglist **new_arg, *a, *actual; | |
2832 gfc_formal_arglist *f; | |
2833 int i, n, na; | |
2834 unsigned long actual_size, formal_size; | |
2835 bool full_array = false; | |
2836 gfc_array_ref *actual_arr_ref; | |
2837 | |
2838 actual = *ap; | |
2839 | |
2840 if (actual == NULL && formal == NULL) | |
2841 return true; | |
2842 | |
2843 n = 0; | |
2844 for (f = formal; f; f = f->next) | |
2845 n++; | |
2846 | |
2847 new_arg = XALLOCAVEC (gfc_actual_arglist *, n); | |
2848 | |
2849 for (i = 0; i < n; i++) | |
2850 new_arg[i] = NULL; | |
2851 | |
2852 na = 0; | |
2853 f = formal; | |
2854 i = 0; | |
2855 | |
2856 for (a = actual; a; a = a->next, f = f->next) | |
2857 { | |
2858 /* Look for keywords but ignore g77 extensions like %VAL. */ | |
2859 if (a->name != NULL && a->name[0] != '%') | |
2860 { | |
2861 i = 0; | |
2862 for (f = formal; f; f = f->next, i++) | |
2863 { | |
2864 if (f->sym == NULL) | |
2865 continue; | |
2866 if (strcmp (f->sym->name, a->name) == 0) | |
2867 break; | |
2868 } | |
2869 | |
2870 if (f == NULL) | |
2871 { | |
2872 if (where) | |
2873 { | |
2874 const char *guessed = lookup_arg_fuzzy (a->name, formal); | |
2875 if (guessed) | |
2876 gfc_error ("Keyword argument %qs at %L is not in " | |
2877 "the procedure; did you mean %qs?", | |
2878 a->name, &a->expr->where, guessed); | |
2879 else | |
2880 gfc_error ("Keyword argument %qs at %L is not in " | |
2881 "the procedure", a->name, &a->expr->where); | |
2882 } | |
2883 return false; | |
2884 } | |
2885 | |
2886 if (new_arg[i] != NULL) | |
2887 { | |
2888 if (where) | |
2889 gfc_error ("Keyword argument %qs at %L is already associated " | |
2890 "with another actual argument", a->name, | |
2891 &a->expr->where); | |
2892 return false; | |
2893 } | |
2894 } | |
2895 | |
2896 if (f == NULL) | |
2897 { | |
2898 if (where) | |
2899 gfc_error ("More actual than formal arguments in procedure " | |
2900 "call at %L", where); | |
2901 | |
2902 return false; | |
2903 } | |
2904 | |
2905 if (f->sym == NULL && a->expr == NULL) | |
2906 goto match; | |
2907 | |
2908 if (f->sym == NULL) | |
2909 { | |
2910 if (where) | |
2911 gfc_error ("Missing alternate return spec in subroutine call " | |
2912 "at %L", where); | |
2913 return false; | |
2914 } | |
2915 | |
2916 if (a->expr == NULL) | |
2917 { | |
2918 if (where) | |
2919 gfc_error ("Unexpected alternate return spec in subroutine " | |
2920 "call at %L", where); | |
2921 return false; | |
2922 } | |
2923 | |
2924 /* Make sure that intrinsic vtables exist for calls to unlimited | |
2925 polymorphic formal arguments. */ | |
2926 if (UNLIMITED_POLY (f->sym) | |
2927 && a->expr->ts.type != BT_DERIVED | |
2928 && a->expr->ts.type != BT_CLASS) | |
2929 gfc_find_vtab (&a->expr->ts); | |
2930 | |
2931 if (a->expr->expr_type == EXPR_NULL | |
2932 && ((f->sym->ts.type != BT_CLASS && !f->sym->attr.pointer | |
2933 && (f->sym->attr.allocatable || !f->sym->attr.optional | |
2934 || (gfc_option.allow_std & GFC_STD_F2008) == 0)) | |
2935 || (f->sym->ts.type == BT_CLASS | |
2936 && !CLASS_DATA (f->sym)->attr.class_pointer | |
2937 && (CLASS_DATA (f->sym)->attr.allocatable | |
2938 || !f->sym->attr.optional | |
2939 || (gfc_option.allow_std & GFC_STD_F2008) == 0)))) | |
2940 { | |
2941 if (where | |
2942 && (!f->sym->attr.optional | |
2943 || (f->sym->ts.type != BT_CLASS && f->sym->attr.allocatable) | |
2944 || (f->sym->ts.type == BT_CLASS | |
2945 && CLASS_DATA (f->sym)->attr.allocatable))) | |
2946 gfc_error ("Unexpected NULL() intrinsic at %L to dummy %qs", | |
2947 where, f->sym->name); | |
2948 else if (where) | |
2949 gfc_error ("Fortran 2008: Null pointer at %L to non-pointer " | |
2950 "dummy %qs", where, f->sym->name); | |
2951 | |
2952 return false; | |
2953 } | |
2954 | |
2955 if (!compare_parameter (f->sym, a->expr, ranks_must_agree, | |
2956 is_elemental, where)) | |
2957 return false; | |
2958 | |
2959 /* TS 29113, 6.3p2. */ | |
2960 if (f->sym->ts.type == BT_ASSUMED | |
2961 && (a->expr->ts.type == BT_DERIVED | |
2962 || (a->expr->ts.type == BT_CLASS && CLASS_DATA (a->expr)))) | |
2963 { | |
2964 gfc_namespace *f2k_derived; | |
2965 | |
2966 f2k_derived = a->expr->ts.type == BT_DERIVED | |
2967 ? a->expr->ts.u.derived->f2k_derived | |
2968 : CLASS_DATA (a->expr)->ts.u.derived->f2k_derived; | |
2969 | |
2970 if (f2k_derived | |
2971 && (f2k_derived->finalizers || f2k_derived->tb_sym_root)) | |
2972 { | |
2973 gfc_error ("Actual argument at %L to assumed-type dummy is of " | |
2974 "derived type with type-bound or FINAL procedures", | |
2975 &a->expr->where); | |
2976 return false; | |
2977 } | |
2978 } | |
2979 | |
2980 /* Special case for character arguments. For allocatable, pointer | |
2981 and assumed-shape dummies, the string length needs to match | |
2982 exactly. */ | |
2983 if (a->expr->ts.type == BT_CHARACTER | |
2984 && a->expr->ts.u.cl && a->expr->ts.u.cl->length | |
2985 && a->expr->ts.u.cl->length->expr_type == EXPR_CONSTANT | |
2986 && f->sym->ts.type == BT_CHARACTER && f->sym->ts.u.cl | |
2987 && f->sym->ts.u.cl->length | |
2988 && f->sym->ts.u.cl->length->expr_type == EXPR_CONSTANT | |
2989 && (f->sym->attr.pointer || f->sym->attr.allocatable | |
2990 || (f->sym->as && f->sym->as->type == AS_ASSUMED_SHAPE)) | |
2991 && (mpz_cmp (a->expr->ts.u.cl->length->value.integer, | |
2992 f->sym->ts.u.cl->length->value.integer) != 0)) | |
2993 { | |
2994 if (where && (f->sym->attr.pointer || f->sym->attr.allocatable)) | |
2995 gfc_warning (OPT_Wargument_mismatch, | |
2996 "Character length mismatch (%ld/%ld) between actual " | |
2997 "argument and pointer or allocatable dummy argument " | |
2998 "%qs at %L", | |
2999 mpz_get_si (a->expr->ts.u.cl->length->value.integer), | |
3000 mpz_get_si (f->sym->ts.u.cl->length->value.integer), | |
3001 f->sym->name, &a->expr->where); | |
3002 else if (where) | |
3003 gfc_warning (OPT_Wargument_mismatch, | |
3004 "Character length mismatch (%ld/%ld) between actual " | |
3005 "argument and assumed-shape dummy argument %qs " | |
3006 "at %L", | |
3007 mpz_get_si (a->expr->ts.u.cl->length->value.integer), | |
3008 mpz_get_si (f->sym->ts.u.cl->length->value.integer), | |
3009 f->sym->name, &a->expr->where); | |
3010 return false; | |
3011 } | |
3012 | |
3013 if ((f->sym->attr.pointer || f->sym->attr.allocatable) | |
3014 && f->sym->ts.deferred != a->expr->ts.deferred | |
3015 && a->expr->ts.type == BT_CHARACTER) | |
3016 { | |
3017 if (where) | |
3018 gfc_error ("Actual argument at %L to allocatable or " | |
3019 "pointer dummy argument %qs must have a deferred " | |
3020 "length type parameter if and only if the dummy has one", | |
3021 &a->expr->where, f->sym->name); | |
3022 return false; | |
3023 } | |
3024 | |
3025 if (f->sym->ts.type == BT_CLASS) | |
3026 goto skip_size_check; | |
3027 | |
3028 actual_size = get_expr_storage_size (a->expr); | |
3029 formal_size = get_sym_storage_size (f->sym); | |
3030 if (actual_size != 0 && actual_size < formal_size | |
3031 && a->expr->ts.type != BT_PROCEDURE | |
3032 && f->sym->attr.flavor != FL_PROCEDURE) | |
3033 { | |
3034 if (a->expr->ts.type == BT_CHARACTER && !f->sym->as && where) | |
3035 gfc_warning (OPT_Wargument_mismatch, | |
3036 "Character length of actual argument shorter " | |
3037 "than of dummy argument %qs (%lu/%lu) at %L", | |
3038 f->sym->name, actual_size, formal_size, | |
3039 &a->expr->where); | |
3040 else if (where) | |
3041 { | |
3042 /* Emit a warning for -std=legacy and an error otherwise. */ | |
3043 if (gfc_option.warn_std == 0) | |
3044 gfc_warning (OPT_Wargument_mismatch, | |
3045 "Actual argument contains too few " | |
3046 "elements for dummy argument %qs (%lu/%lu) " | |
3047 "at %L", f->sym->name, actual_size, | |
3048 formal_size, &a->expr->where); | |
3049 else | |
3050 gfc_error_now ("Actual argument contains too few " | |
3051 "elements for dummy argument %qs (%lu/%lu) " | |
3052 "at %L", f->sym->name, actual_size, | |
3053 formal_size, &a->expr->where); | |
3054 } | |
3055 return false; | |
3056 } | |
3057 | |
3058 skip_size_check: | |
3059 | |
3060 /* Satisfy F03:12.4.1.3 by ensuring that a procedure pointer actual | |
3061 argument is provided for a procedure pointer formal argument. */ | |
3062 if (f->sym->attr.proc_pointer | |
3063 && !((a->expr->expr_type == EXPR_VARIABLE | |
3064 && (a->expr->symtree->n.sym->attr.proc_pointer | |
3065 || gfc_is_proc_ptr_comp (a->expr))) | |
3066 || (a->expr->expr_type == EXPR_FUNCTION | |
3067 && is_procptr_result (a->expr)))) | |
3068 { | |
3069 if (where) | |
3070 gfc_error ("Expected a procedure pointer for argument %qs at %L", | |
3071 f->sym->name, &a->expr->where); | |
3072 return false; | |
3073 } | |
3074 | |
3075 /* Satisfy F03:12.4.1.3 by ensuring that a procedure actual argument is | |
3076 provided for a procedure formal argument. */ | |
3077 if (f->sym->attr.flavor == FL_PROCEDURE | |
3078 && !((a->expr->expr_type == EXPR_VARIABLE | |
3079 && (a->expr->symtree->n.sym->attr.flavor == FL_PROCEDURE | |
3080 || a->expr->symtree->n.sym->attr.proc_pointer | |
3081 || gfc_is_proc_ptr_comp (a->expr))) | |
3082 || (a->expr->expr_type == EXPR_FUNCTION | |
3083 && is_procptr_result (a->expr)))) | |
3084 { | |
3085 if (where) | |
3086 gfc_error ("Expected a procedure for argument %qs at %L", | |
3087 f->sym->name, &a->expr->where); | |
3088 return false; | |
3089 } | |
3090 | |
3091 if (f->sym->as && f->sym->as->type == AS_ASSUMED_SHAPE | |
3092 && a->expr->expr_type == EXPR_VARIABLE | |
3093 && a->expr->symtree->n.sym->as | |
3094 && a->expr->symtree->n.sym->as->type == AS_ASSUMED_SIZE | |
3095 && (a->expr->ref == NULL | |
3096 || (a->expr->ref->type == REF_ARRAY | |
3097 && a->expr->ref->u.ar.type == AR_FULL))) | |
3098 { | |
3099 if (where) | |
3100 gfc_error ("Actual argument for %qs cannot be an assumed-size" | |
3101 " array at %L", f->sym->name, where); | |
3102 return false; | |
3103 } | |
3104 | |
3105 if (a->expr->expr_type != EXPR_NULL | |
3106 && compare_pointer (f->sym, a->expr) == 0) | |
3107 { | |
3108 if (where) | |
3109 gfc_error ("Actual argument for %qs must be a pointer at %L", | |
3110 f->sym->name, &a->expr->where); | |
3111 return false; | |
3112 } | |
3113 | |
3114 if (a->expr->expr_type != EXPR_NULL | |
3115 && (gfc_option.allow_std & GFC_STD_F2008) == 0 | |
3116 && compare_pointer (f->sym, a->expr) == 2) | |
3117 { | |
3118 if (where) | |
3119 gfc_error ("Fortran 2008: Non-pointer actual argument at %L to " | |
3120 "pointer dummy %qs", &a->expr->where,f->sym->name); | |
3121 return false; | |
3122 } | |
3123 | |
3124 | |
3125 /* Fortran 2008, C1242. */ | |
3126 if (f->sym->attr.pointer && gfc_is_coindexed (a->expr)) | |
3127 { | |
3128 if (where) | |
3129 gfc_error ("Coindexed actual argument at %L to pointer " | |
3130 "dummy %qs", | |
3131 &a->expr->where, f->sym->name); | |
3132 return false; | |
3133 } | |
3134 | |
3135 /* Fortran 2008, 12.5.2.5 (no constraint). */ | |
3136 if (a->expr->expr_type == EXPR_VARIABLE | |
3137 && f->sym->attr.intent != INTENT_IN | |
3138 && f->sym->attr.allocatable | |
3139 && gfc_is_coindexed (a->expr)) | |
3140 { | |
3141 if (where) | |
3142 gfc_error ("Coindexed actual argument at %L to allocatable " | |
3143 "dummy %qs requires INTENT(IN)", | |
3144 &a->expr->where, f->sym->name); | |
3145 return false; | |
3146 } | |
3147 | |
3148 /* Fortran 2008, C1237. */ | |
3149 if (a->expr->expr_type == EXPR_VARIABLE | |
3150 && (f->sym->attr.asynchronous || f->sym->attr.volatile_) | |
3151 && gfc_is_coindexed (a->expr) | |
3152 && (a->expr->symtree->n.sym->attr.volatile_ | |
3153 || a->expr->symtree->n.sym->attr.asynchronous)) | |
3154 { | |
3155 if (where) | |
3156 gfc_error ("Coindexed ASYNCHRONOUS or VOLATILE actual argument at " | |
3157 "%L requires that dummy %qs has neither " | |
3158 "ASYNCHRONOUS nor VOLATILE", &a->expr->where, | |
3159 f->sym->name); | |
3160 return false; | |
3161 } | |
3162 | |
3163 /* Fortran 2008, 12.5.2.4 (no constraint). */ | |
3164 if (a->expr->expr_type == EXPR_VARIABLE | |
3165 && f->sym->attr.intent != INTENT_IN && !f->sym->attr.value | |
3166 && gfc_is_coindexed (a->expr) | |
3167 && gfc_has_ultimate_allocatable (a->expr)) | |
3168 { | |
3169 if (where) | |
3170 gfc_error ("Coindexed actual argument at %L with allocatable " | |
3171 "ultimate component to dummy %qs requires either VALUE " | |
3172 "or INTENT(IN)", &a->expr->where, f->sym->name); | |
3173 return false; | |
3174 } | |
3175 | |
3176 if (f->sym->ts.type == BT_CLASS | |
3177 && CLASS_DATA (f->sym)->attr.allocatable | |
3178 && gfc_is_class_array_ref (a->expr, &full_array) | |
3179 && !full_array) | |
3180 { | |
3181 if (where) | |
3182 gfc_error ("Actual CLASS array argument for %qs must be a full " | |
3183 "array at %L", f->sym->name, &a->expr->where); | |
3184 return false; | |
3185 } | |
3186 | |
3187 | |
3188 if (a->expr->expr_type != EXPR_NULL | |
3189 && !compare_allocatable (f->sym, a->expr)) | |
3190 { | |
3191 if (where) | |
3192 gfc_error ("Actual argument for %qs must be ALLOCATABLE at %L", | |
3193 f->sym->name, &a->expr->where); | |
3194 return false; | |
3195 } | |
3196 | |
3197 /* Check intent = OUT/INOUT for definable actual argument. */ | |
3198 if ((f->sym->attr.intent == INTENT_OUT | |
3199 || f->sym->attr.intent == INTENT_INOUT)) | |
3200 { | |
3201 const char* context = (where | |
3202 ? _("actual argument to INTENT = OUT/INOUT") | |
3203 : NULL); | |
3204 | |
3205 if (((f->sym->ts.type == BT_CLASS && f->sym->attr.class_ok | |
3206 && CLASS_DATA (f->sym)->attr.class_pointer) | |
3207 || (f->sym->ts.type != BT_CLASS && f->sym->attr.pointer)) | |
3208 && !gfc_check_vardef_context (a->expr, true, false, false, context)) | |
3209 return false; | |
3210 if (!gfc_check_vardef_context (a->expr, false, false, false, context)) | |
3211 return false; | |
3212 } | |
3213 | |
3214 if ((f->sym->attr.intent == INTENT_OUT | |
3215 || f->sym->attr.intent == INTENT_INOUT | |
3216 || f->sym->attr.volatile_ | |
3217 || f->sym->attr.asynchronous) | |
3218 && gfc_has_vector_subscript (a->expr)) | |
3219 { | |
3220 if (where) | |
3221 gfc_error ("Array-section actual argument with vector " | |
3222 "subscripts at %L is incompatible with INTENT(OUT), " | |
3223 "INTENT(INOUT), VOLATILE or ASYNCHRONOUS attribute " | |
3224 "of the dummy argument %qs", | |
3225 &a->expr->where, f->sym->name); | |
3226 return false; | |
3227 } | |
3228 | |
3229 /* C1232 (R1221) For an actual argument which is an array section or | |
3230 an assumed-shape array, the dummy argument shall be an assumed- | |
3231 shape array, if the dummy argument has the VOLATILE attribute. */ | |
3232 | |
3233 if (f->sym->attr.volatile_ | |
3234 && a->expr->expr_type == EXPR_VARIABLE | |
3235 && a->expr->symtree->n.sym->as | |
3236 && a->expr->symtree->n.sym->as->type == AS_ASSUMED_SHAPE | |
3237 && !(f->sym->as && f->sym->as->type == AS_ASSUMED_SHAPE)) | |
3238 { | |
3239 if (where) | |
3240 gfc_error ("Assumed-shape actual argument at %L is " | |
3241 "incompatible with the non-assumed-shape " | |
3242 "dummy argument %qs due to VOLATILE attribute", | |
3243 &a->expr->where,f->sym->name); | |
3244 return false; | |
3245 } | |
3246 | |
3247 /* Find the last array_ref. */ | |
3248 actual_arr_ref = NULL; | |
3249 if (a->expr->ref) | |
3250 actual_arr_ref = gfc_find_array_ref (a->expr, true); | |
3251 | |
3252 if (f->sym->attr.volatile_ | |
3253 && actual_arr_ref && actual_arr_ref->type == AR_SECTION | |
3254 && !(f->sym->as && f->sym->as->type == AS_ASSUMED_SHAPE)) | |
3255 { | |
3256 if (where) | |
3257 gfc_error ("Array-section actual argument at %L is " | |
3258 "incompatible with the non-assumed-shape " | |
3259 "dummy argument %qs due to VOLATILE attribute", | |
3260 &a->expr->where, f->sym->name); | |
3261 return false; | |
3262 } | |
3263 | |
3264 /* C1233 (R1221) For an actual argument which is a pointer array, the | |
3265 dummy argument shall be an assumed-shape or pointer array, if the | |
3266 dummy argument has the VOLATILE attribute. */ | |
3267 | |
3268 if (f->sym->attr.volatile_ | |
3269 && a->expr->expr_type == EXPR_VARIABLE | |
3270 && a->expr->symtree->n.sym->attr.pointer | |
3271 && a->expr->symtree->n.sym->as | |
3272 && !(f->sym->as | |
3273 && (f->sym->as->type == AS_ASSUMED_SHAPE | |
3274 || f->sym->attr.pointer))) | |
3275 { | |
3276 if (where) | |
3277 gfc_error ("Pointer-array actual argument at %L requires " | |
3278 "an assumed-shape or pointer-array dummy " | |
3279 "argument %qs due to VOLATILE attribute", | |
3280 &a->expr->where,f->sym->name); | |
3281 return false; | |
3282 } | |
3283 | |
3284 match: | |
3285 if (a == actual) | |
3286 na = i; | |
3287 | |
3288 new_arg[i++] = a; | |
3289 } | |
3290 | |
3291 /* Make sure missing actual arguments are optional. */ | |
3292 i = 0; | |
3293 for (f = formal; f; f = f->next, i++) | |
3294 { | |
3295 if (new_arg[i] != NULL) | |
3296 continue; | |
3297 if (f->sym == NULL) | |
3298 { | |
3299 if (where) | |
3300 gfc_error ("Missing alternate return spec in subroutine call " | |
3301 "at %L", where); | |
3302 return false; | |
3303 } | |
3304 if (!f->sym->attr.optional) | |
3305 { | |
3306 if (where) | |
3307 gfc_error ("Missing actual argument for argument %qs at %L", | |
3308 f->sym->name, where); | |
3309 return false; | |
3310 } | |
3311 } | |
3312 | |
3313 /* The argument lists are compatible. We now relink a new actual | |
3314 argument list with null arguments in the right places. The head | |
3315 of the list remains the head. */ | |
3316 for (i = 0; i < n; i++) | |
3317 if (new_arg[i] == NULL) | |
3318 new_arg[i] = gfc_get_actual_arglist (); | |
3319 | |
3320 if (na != 0) | |
3321 { | |
3322 std::swap (*new_arg[0], *actual); | |
3323 std::swap (new_arg[0], new_arg[na]); | |
3324 } | |
3325 | |
3326 for (i = 0; i < n - 1; i++) | |
3327 new_arg[i]->next = new_arg[i + 1]; | |
3328 | |
3329 new_arg[i]->next = NULL; | |
3330 | |
3331 if (*ap == NULL && n > 0) | |
3332 *ap = new_arg[0]; | |
3333 | |
3334 /* Note the types of omitted optional arguments. */ | |
3335 for (a = *ap, f = formal; a; a = a->next, f = f->next) | |
3336 if (a->expr == NULL && a->label == NULL) | |
3337 a->missing_arg_type = f->sym->ts.type; | |
3338 | |
3339 return true; | |
3340 } | |
3341 | |
3342 | |
3343 typedef struct | |
3344 { | |
3345 gfc_formal_arglist *f; | |
3346 gfc_actual_arglist *a; | |
3347 } | |
3348 argpair; | |
3349 | |
3350 /* qsort comparison function for argument pairs, with the following | |
3351 order: | |
3352 - p->a->expr == NULL | |
3353 - p->a->expr->expr_type != EXPR_VARIABLE | |
3354 - by gfc_symbol pointer value (larger first). */ | |
3355 | |
3356 static int | |
3357 pair_cmp (const void *p1, const void *p2) | |
3358 { | |
3359 const gfc_actual_arglist *a1, *a2; | |
3360 | |
3361 /* *p1 and *p2 are elements of the to-be-sorted array. */ | |
3362 a1 = ((const argpair *) p1)->a; | |
3363 a2 = ((const argpair *) p2)->a; | |
3364 if (!a1->expr) | |
3365 { | |
3366 if (!a2->expr) | |
3367 return 0; | |
3368 return -1; | |
3369 } | |
3370 if (!a2->expr) | |
3371 return 1; | |
3372 if (a1->expr->expr_type != EXPR_VARIABLE) | |
3373 { | |
3374 if (a2->expr->expr_type != EXPR_VARIABLE) | |
3375 return 0; | |
3376 return -1; | |
3377 } | |
3378 if (a2->expr->expr_type != EXPR_VARIABLE) | |
3379 return 1; | |
3380 if (a1->expr->symtree->n.sym > a2->expr->symtree->n.sym) | |
3381 return -1; | |
3382 return a1->expr->symtree->n.sym < a2->expr->symtree->n.sym; | |
3383 } | |
3384 | |
3385 | |
3386 /* Given two expressions from some actual arguments, test whether they | |
3387 refer to the same expression. The analysis is conservative. | |
3388 Returning false will produce no warning. */ | |
3389 | |
3390 static bool | |
3391 compare_actual_expr (gfc_expr *e1, gfc_expr *e2) | |
3392 { | |
3393 const gfc_ref *r1, *r2; | |
3394 | |
3395 if (!e1 || !e2 | |
3396 || e1->expr_type != EXPR_VARIABLE | |
3397 || e2->expr_type != EXPR_VARIABLE | |
3398 || e1->symtree->n.sym != e2->symtree->n.sym) | |
3399 return false; | |
3400 | |
3401 /* TODO: improve comparison, see expr.c:show_ref(). */ | |
3402 for (r1 = e1->ref, r2 = e2->ref; r1 && r2; r1 = r1->next, r2 = r2->next) | |
3403 { | |
3404 if (r1->type != r2->type) | |
3405 return false; | |
3406 switch (r1->type) | |
3407 { | |
3408 case REF_ARRAY: | |
3409 if (r1->u.ar.type != r2->u.ar.type) | |
3410 return false; | |
3411 /* TODO: At the moment, consider only full arrays; | |
3412 we could do better. */ | |
3413 if (r1->u.ar.type != AR_FULL || r2->u.ar.type != AR_FULL) | |
3414 return false; | |
3415 break; | |
3416 | |
3417 case REF_COMPONENT: | |
3418 if (r1->u.c.component != r2->u.c.component) | |
3419 return false; | |
3420 break; | |
3421 | |
3422 case REF_SUBSTRING: | |
3423 return false; | |
3424 | |
3425 default: | |
3426 gfc_internal_error ("compare_actual_expr(): Bad component code"); | |
3427 } | |
3428 } | |
3429 if (!r1 && !r2) | |
3430 return true; | |
3431 return false; | |
3432 } | |
3433 | |
3434 | |
3435 /* Given formal and actual argument lists that correspond to one | |
3436 another, check that identical actual arguments aren't not | |
3437 associated with some incompatible INTENTs. */ | |
3438 | |
3439 static bool | |
3440 check_some_aliasing (gfc_formal_arglist *f, gfc_actual_arglist *a) | |
3441 { | |
3442 sym_intent f1_intent, f2_intent; | |
3443 gfc_formal_arglist *f1; | |
3444 gfc_actual_arglist *a1; | |
3445 size_t n, i, j; | |
3446 argpair *p; | |
3447 bool t = true; | |
3448 | |
3449 n = 0; | |
3450 for (f1 = f, a1 = a;; f1 = f1->next, a1 = a1->next) | |
3451 { | |
3452 if (f1 == NULL && a1 == NULL) | |
3453 break; | |
3454 if (f1 == NULL || a1 == NULL) | |
3455 gfc_internal_error ("check_some_aliasing(): List mismatch"); | |
3456 n++; | |
3457 } | |
3458 if (n == 0) | |
3459 return t; | |
3460 p = XALLOCAVEC (argpair, n); | |
3461 | |
3462 for (i = 0, f1 = f, a1 = a; i < n; i++, f1 = f1->next, a1 = a1->next) | |
3463 { | |
3464 p[i].f = f1; | |
3465 p[i].a = a1; | |
3466 } | |
3467 | |
3468 qsort (p, n, sizeof (argpair), pair_cmp); | |
3469 | |
3470 for (i = 0; i < n; i++) | |
3471 { | |
3472 if (!p[i].a->expr | |
3473 || p[i].a->expr->expr_type != EXPR_VARIABLE | |
3474 || p[i].a->expr->ts.type == BT_PROCEDURE) | |
3475 continue; | |
3476 f1_intent = p[i].f->sym->attr.intent; | |
3477 for (j = i + 1; j < n; j++) | |
3478 { | |
3479 /* Expected order after the sort. */ | |
3480 if (!p[j].a->expr || p[j].a->expr->expr_type != EXPR_VARIABLE) | |
3481 gfc_internal_error ("check_some_aliasing(): corrupted data"); | |
3482 | |
3483 /* Are the expression the same? */ | |
3484 if (!compare_actual_expr (p[i].a->expr, p[j].a->expr)) | |
3485 break; | |
3486 f2_intent = p[j].f->sym->attr.intent; | |
3487 if ((f1_intent == INTENT_IN && f2_intent == INTENT_OUT) | |
3488 || (f1_intent == INTENT_OUT && f2_intent == INTENT_IN) | |
3489 || (f1_intent == INTENT_OUT && f2_intent == INTENT_OUT)) | |
3490 { | |
3491 gfc_warning (0, "Same actual argument associated with INTENT(%s) " | |
3492 "argument %qs and INTENT(%s) argument %qs at %L", | |
3493 gfc_intent_string (f1_intent), p[i].f->sym->name, | |
3494 gfc_intent_string (f2_intent), p[j].f->sym->name, | |
3495 &p[i].a->expr->where); | |
3496 t = false; | |
3497 } | |
3498 } | |
3499 } | |
3500 | |
3501 return t; | |
3502 } | |
3503 | |
3504 | |
3505 /* Given formal and actual argument lists that correspond to one | |
3506 another, check that they are compatible in the sense that intents | |
3507 are not mismatched. */ | |
3508 | |
3509 static bool | |
3510 check_intents (gfc_formal_arglist *f, gfc_actual_arglist *a) | |
3511 { | |
3512 sym_intent f_intent; | |
3513 | |
3514 for (;; f = f->next, a = a->next) | |
3515 { | |
3516 gfc_expr *expr; | |
3517 | |
3518 if (f == NULL && a == NULL) | |
3519 break; | |
3520 if (f == NULL || a == NULL) | |
3521 gfc_internal_error ("check_intents(): List mismatch"); | |
3522 | |
3523 if (a->expr && a->expr->expr_type == EXPR_FUNCTION | |
3524 && a->expr->value.function.isym | |
3525 && a->expr->value.function.isym->id == GFC_ISYM_CAF_GET) | |
3526 expr = a->expr->value.function.actual->expr; | |
3527 else | |
3528 expr = a->expr; | |
3529 | |
3530 if (expr == NULL || expr->expr_type != EXPR_VARIABLE) | |
3531 continue; | |
3532 | |
3533 f_intent = f->sym->attr.intent; | |
3534 | |
3535 if (gfc_pure (NULL) && gfc_impure_variable (expr->symtree->n.sym)) | |
3536 { | |
3537 if ((f->sym->ts.type == BT_CLASS && f->sym->attr.class_ok | |
3538 && CLASS_DATA (f->sym)->attr.class_pointer) | |
3539 || (f->sym->ts.type != BT_CLASS && f->sym->attr.pointer)) | |
3540 { | |
3541 gfc_error ("Procedure argument at %L is local to a PURE " | |
3542 "procedure and has the POINTER attribute", | |
3543 &expr->where); | |
3544 return false; | |
3545 } | |
3546 } | |
3547 | |
3548 /* Fortran 2008, C1283. */ | |
3549 if (gfc_pure (NULL) && gfc_is_coindexed (expr)) | |
3550 { | |
3551 if (f_intent == INTENT_INOUT || f_intent == INTENT_OUT) | |
3552 { | |
3553 gfc_error ("Coindexed actual argument at %L in PURE procedure " | |
3554 "is passed to an INTENT(%s) argument", | |
3555 &expr->where, gfc_intent_string (f_intent)); | |
3556 return false; | |
3557 } | |
3558 | |
3559 if ((f->sym->ts.type == BT_CLASS && f->sym->attr.class_ok | |
3560 && CLASS_DATA (f->sym)->attr.class_pointer) | |
3561 || (f->sym->ts.type != BT_CLASS && f->sym->attr.pointer)) | |
3562 { | |
3563 gfc_error ("Coindexed actual argument at %L in PURE procedure " | |
3564 "is passed to a POINTER dummy argument", | |
3565 &expr->where); | |
3566 return false; | |
3567 } | |
3568 } | |
3569 | |
3570 /* F2008, Section 12.5.2.4. */ | |
3571 if (expr->ts.type == BT_CLASS && f->sym->ts.type == BT_CLASS | |
3572 && gfc_is_coindexed (expr)) | |
3573 { | |
3574 gfc_error ("Coindexed polymorphic actual argument at %L is passed " | |
3575 "polymorphic dummy argument %qs", | |
3576 &expr->where, f->sym->name); | |
3577 return false; | |
3578 } | |
3579 } | |
3580 | |
3581 return true; | |
3582 } | |
3583 | |
3584 | |
3585 /* Check how a procedure is used against its interface. If all goes | |
3586 well, the actual argument list will also end up being properly | |
3587 sorted. */ | |
3588 | |
3589 bool | |
3590 gfc_procedure_use (gfc_symbol *sym, gfc_actual_arglist **ap, locus *where) | |
3591 { | |
3592 gfc_formal_arglist *dummy_args; | |
3593 | |
3594 /* Warn about calls with an implicit interface. Special case | |
3595 for calling a ISO_C_BINDING because c_loc and c_funloc | |
3596 are pseudo-unknown. Additionally, warn about procedures not | |
3597 explicitly declared at all if requested. */ | |
3598 if (sym->attr.if_source == IFSRC_UNKNOWN && !sym->attr.is_iso_c) | |
3599 { | |
3600 if (sym->ns->has_implicit_none_export && sym->attr.proc == PROC_UNKNOWN) | |
3601 { | |
3602 const char *guessed | |
3603 = gfc_lookup_function_fuzzy (sym->name, sym->ns->sym_root); | |
3604 if (guessed) | |
3605 gfc_error ("Procedure %qs called at %L is not explicitly declared" | |
3606 "; did you mean %qs?", | |
3607 sym->name, where, guessed); | |
3608 else | |
3609 gfc_error ("Procedure %qs called at %L is not explicitly declared", | |
3610 sym->name, where); | |
3611 return false; | |
3612 } | |
3613 if (warn_implicit_interface) | |
3614 gfc_warning (OPT_Wimplicit_interface, | |
3615 "Procedure %qs called with an implicit interface at %L", | |
3616 sym->name, where); | |
3617 else if (warn_implicit_procedure && sym->attr.proc == PROC_UNKNOWN) | |
3618 gfc_warning (OPT_Wimplicit_procedure, | |
3619 "Procedure %qs called at %L is not explicitly declared", | |
3620 sym->name, where); | |
3621 } | |
3622 | |
3623 if (sym->attr.if_source == IFSRC_UNKNOWN) | |
3624 { | |
3625 gfc_actual_arglist *a; | |
3626 | |
3627 if (sym->attr.pointer) | |
3628 { | |
3629 gfc_error ("The pointer object %qs at %L must have an explicit " | |
3630 "function interface or be declared as array", | |
3631 sym->name, where); | |
3632 return false; | |
3633 } | |
3634 | |
3635 if (sym->attr.allocatable && !sym->attr.external) | |
3636 { | |
3637 gfc_error ("The allocatable object %qs at %L must have an explicit " | |
3638 "function interface or be declared as array", | |
3639 sym->name, where); | |
3640 return false; | |
3641 } | |
3642 | |
3643 if (sym->attr.allocatable) | |
3644 { | |
3645 gfc_error ("Allocatable function %qs at %L must have an explicit " | |
3646 "function interface", sym->name, where); | |
3647 return false; | |
3648 } | |
3649 | |
3650 for (a = *ap; a; a = a->next) | |
3651 { | |
3652 /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */ | |
3653 if (a->name != NULL && a->name[0] != '%') | |
3654 { | |
3655 gfc_error ("Keyword argument requires explicit interface " | |
3656 "for procedure %qs at %L", sym->name, &a->expr->where); | |
3657 break; | |
3658 } | |
3659 | |
3660 /* TS 29113, 6.2. */ | |
3661 if (a->expr && a->expr->ts.type == BT_ASSUMED | |
3662 && sym->intmod_sym_id != ISOCBINDING_LOC) | |
3663 { | |
3664 gfc_error ("Assumed-type argument %s at %L requires an explicit " | |
3665 "interface", a->expr->symtree->n.sym->name, | |
3666 &a->expr->where); | |
3667 break; | |
3668 } | |
3669 | |
3670 /* F2008, C1303 and C1304. */ | |
3671 if (a->expr | |
3672 && (a->expr->ts.type == BT_DERIVED || a->expr->ts.type == BT_CLASS) | |
3673 && ((a->expr->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV | |
3674 && a->expr->ts.u.derived->intmod_sym_id == ISOFORTRAN_LOCK_TYPE) | |
3675 || gfc_expr_attr (a->expr).lock_comp)) | |
3676 { | |
3677 gfc_error ("Actual argument of LOCK_TYPE or with LOCK_TYPE " | |
3678 "component at %L requires an explicit interface for " | |
3679 "procedure %qs", &a->expr->where, sym->name); | |
3680 break; | |
3681 } | |
3682 | |
3683 if (a->expr | |
3684 && (a->expr->ts.type == BT_DERIVED || a->expr->ts.type == BT_CLASS) | |
3685 && ((a->expr->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV | |
3686 && a->expr->ts.u.derived->intmod_sym_id | |
3687 == ISOFORTRAN_EVENT_TYPE) | |
3688 || gfc_expr_attr (a->expr).event_comp)) | |
3689 { | |
3690 gfc_error ("Actual argument of EVENT_TYPE or with EVENT_TYPE " | |
3691 "component at %L requires an explicit interface for " | |
3692 "procedure %qs", &a->expr->where, sym->name); | |
3693 break; | |
3694 } | |
3695 | |
3696 if (a->expr && a->expr->expr_type == EXPR_NULL | |
3697 && a->expr->ts.type == BT_UNKNOWN) | |
3698 { | |
3699 gfc_error ("MOLD argument to NULL required at %L", &a->expr->where); | |
3700 return false; | |
3701 } | |
3702 | |
3703 /* TS 29113, C407b. */ | |
3704 if (a->expr && a->expr->expr_type == EXPR_VARIABLE | |
3705 && symbol_rank (a->expr->symtree->n.sym) == -1) | |
3706 { | |
3707 gfc_error ("Assumed-rank argument requires an explicit interface " | |
3708 "at %L", &a->expr->where); | |
3709 return false; | |
3710 } | |
3711 } | |
3712 | |
3713 return true; | |
3714 } | |
3715 | |
3716 dummy_args = gfc_sym_get_dummy_args (sym); | |
3717 | |
3718 if (!compare_actual_formal (ap, dummy_args, 0, sym->attr.elemental, where)) | |
3719 return false; | |
3720 | |
3721 if (!check_intents (dummy_args, *ap)) | |
3722 return false; | |
3723 | |
3724 if (warn_aliasing) | |
3725 check_some_aliasing (dummy_args, *ap); | |
3726 | |
3727 return true; | |
3728 } | |
3729 | |
3730 | |
3731 /* Check how a procedure pointer component is used against its interface. | |
3732 If all goes well, the actual argument list will also end up being properly | |
3733 sorted. Completely analogous to gfc_procedure_use. */ | |
3734 | |
3735 void | |
3736 gfc_ppc_use (gfc_component *comp, gfc_actual_arglist **ap, locus *where) | |
3737 { | |
3738 /* Warn about calls with an implicit interface. Special case | |
3739 for calling a ISO_C_BINDING because c_loc and c_funloc | |
3740 are pseudo-unknown. */ | |
3741 if (warn_implicit_interface | |
3742 && comp->attr.if_source == IFSRC_UNKNOWN | |
3743 && !comp->attr.is_iso_c) | |
3744 gfc_warning (OPT_Wimplicit_interface, | |
3745 "Procedure pointer component %qs called with an implicit " | |
3746 "interface at %L", comp->name, where); | |
3747 | |
3748 if (comp->attr.if_source == IFSRC_UNKNOWN) | |
3749 { | |
3750 gfc_actual_arglist *a; | |
3751 for (a = *ap; a; a = a->next) | |
3752 { | |
3753 /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */ | |
3754 if (a->name != NULL && a->name[0] != '%') | |
3755 { | |
3756 gfc_error ("Keyword argument requires explicit interface " | |
3757 "for procedure pointer component %qs at %L", | |
3758 comp->name, &a->expr->where); | |
3759 break; | |
3760 } | |
3761 } | |
3762 | |
3763 return; | |
3764 } | |
3765 | |
3766 if (!compare_actual_formal (ap, comp->ts.interface->formal, 0, | |
3767 comp->attr.elemental, where)) | |
3768 return; | |
3769 | |
3770 check_intents (comp->ts.interface->formal, *ap); | |
3771 if (warn_aliasing) | |
3772 check_some_aliasing (comp->ts.interface->formal, *ap); | |
3773 } | |
3774 | |
3775 | |
3776 /* Try if an actual argument list matches the formal list of a symbol, | |
3777 respecting the symbol's attributes like ELEMENTAL. This is used for | |
3778 GENERIC resolution. */ | |
3779 | |
3780 bool | |
3781 gfc_arglist_matches_symbol (gfc_actual_arglist** args, gfc_symbol* sym) | |
3782 { | |
3783 gfc_formal_arglist *dummy_args; | |
3784 bool r; | |
3785 | |
3786 if (sym->attr.flavor != FL_PROCEDURE) | |
3787 return false; | |
3788 | |
3789 dummy_args = gfc_sym_get_dummy_args (sym); | |
3790 | |
3791 r = !sym->attr.elemental; | |
3792 if (compare_actual_formal (args, dummy_args, r, !r, NULL)) | |
3793 { | |
3794 check_intents (dummy_args, *args); | |
3795 if (warn_aliasing) | |
3796 check_some_aliasing (dummy_args, *args); | |
3797 return true; | |
3798 } | |
3799 | |
3800 return false; | |
3801 } | |
3802 | |
3803 | |
3804 /* Given an interface pointer and an actual argument list, search for | |
3805 a formal argument list that matches the actual. If found, returns | |
3806 a pointer to the symbol of the correct interface. Returns NULL if | |
3807 not found. */ | |
3808 | |
3809 gfc_symbol * | |
3810 gfc_search_interface (gfc_interface *intr, int sub_flag, | |
3811 gfc_actual_arglist **ap) | |
3812 { | |
3813 gfc_symbol *elem_sym = NULL; | |
3814 gfc_symbol *null_sym = NULL; | |
3815 locus null_expr_loc; | |
3816 gfc_actual_arglist *a; | |
3817 bool has_null_arg = false; | |
3818 | |
3819 for (a = *ap; a; a = a->next) | |
3820 if (a->expr && a->expr->expr_type == EXPR_NULL | |
3821 && a->expr->ts.type == BT_UNKNOWN) | |
3822 { | |
3823 has_null_arg = true; | |
3824 null_expr_loc = a->expr->where; | |
3825 break; | |
3826 } | |
3827 | |
3828 for (; intr; intr = intr->next) | |
3829 { | |
3830 if (gfc_fl_struct (intr->sym->attr.flavor)) | |
3831 continue; | |
3832 if (sub_flag && intr->sym->attr.function) | |
3833 continue; | |
3834 if (!sub_flag && intr->sym->attr.subroutine) | |
3835 continue; | |
3836 | |
3837 if (gfc_arglist_matches_symbol (ap, intr->sym)) | |
3838 { | |
3839 if (has_null_arg && null_sym) | |
3840 { | |
3841 gfc_error ("MOLD= required in NULL() argument at %L: Ambiguity " | |
3842 "between specific functions %s and %s", | |
3843 &null_expr_loc, null_sym->name, intr->sym->name); | |
3844 return NULL; | |
3845 } | |
3846 else if (has_null_arg) | |
3847 { | |
3848 null_sym = intr->sym; | |
3849 continue; | |
3850 } | |
3851 | |
3852 /* Satisfy 12.4.4.1 such that an elemental match has lower | |
3853 weight than a non-elemental match. */ | |
3854 if (intr->sym->attr.elemental) | |
3855 { | |
3856 elem_sym = intr->sym; | |
3857 continue; | |
3858 } | |
3859 return intr->sym; | |
3860 } | |
3861 } | |
3862 | |
3863 if (null_sym) | |
3864 return null_sym; | |
3865 | |
3866 return elem_sym ? elem_sym : NULL; | |
3867 } | |
3868 | |
3869 | |
3870 /* Do a brute force recursive search for a symbol. */ | |
3871 | |
3872 static gfc_symtree * | |
3873 find_symtree0 (gfc_symtree *root, gfc_symbol *sym) | |
3874 { | |
3875 gfc_symtree * st; | |
3876 | |
3877 if (root->n.sym == sym) | |
3878 return root; | |
3879 | |
3880 st = NULL; | |
3881 if (root->left) | |
3882 st = find_symtree0 (root->left, sym); | |
3883 if (root->right && ! st) | |
3884 st = find_symtree0 (root->right, sym); | |
3885 return st; | |
3886 } | |
3887 | |
3888 | |
3889 /* Find a symtree for a symbol. */ | |
3890 | |
3891 gfc_symtree * | |
3892 gfc_find_sym_in_symtree (gfc_symbol *sym) | |
3893 { | |
3894 gfc_symtree *st; | |
3895 gfc_namespace *ns; | |
3896 | |
3897 /* First try to find it by name. */ | |
3898 gfc_find_sym_tree (sym->name, gfc_current_ns, 1, &st); | |
3899 if (st && st->n.sym == sym) | |
3900 return st; | |
3901 | |
3902 /* If it's been renamed, resort to a brute-force search. */ | |
3903 /* TODO: avoid having to do this search. If the symbol doesn't exist | |
3904 in the symtree for the current namespace, it should probably be added. */ | |
3905 for (ns = gfc_current_ns; ns; ns = ns->parent) | |
3906 { | |
3907 st = find_symtree0 (ns->sym_root, sym); | |
3908 if (st) | |
3909 return st; | |
3910 } | |
3911 gfc_internal_error ("Unable to find symbol %qs", sym->name); | |
3912 /* Not reached. */ | |
3913 } | |
3914 | |
3915 | |
3916 /* See if the arglist to an operator-call contains a derived-type argument | |
3917 with a matching type-bound operator. If so, return the matching specific | |
3918 procedure defined as operator-target as well as the base-object to use | |
3919 (which is the found derived-type argument with operator). The generic | |
3920 name, if any, is transmitted to the final expression via 'gname'. */ | |
3921 | |
3922 static gfc_typebound_proc* | |
3923 matching_typebound_op (gfc_expr** tb_base, | |
3924 gfc_actual_arglist* args, | |
3925 gfc_intrinsic_op op, const char* uop, | |
3926 const char ** gname) | |
3927 { | |
3928 gfc_actual_arglist* base; | |
3929 | |
3930 for (base = args; base; base = base->next) | |
3931 if (base->expr->ts.type == BT_DERIVED || base->expr->ts.type == BT_CLASS) | |
3932 { | |
3933 gfc_typebound_proc* tb; | |
3934 gfc_symbol* derived; | |
3935 bool result; | |
3936 | |
3937 while (base->expr->expr_type == EXPR_OP | |
3938 && base->expr->value.op.op == INTRINSIC_PARENTHESES) | |
3939 base->expr = base->expr->value.op.op1; | |
3940 | |
3941 if (base->expr->ts.type == BT_CLASS) | |
3942 { | |
3943 if (!base->expr->ts.u.derived || CLASS_DATA (base->expr) == NULL | |
3944 || !gfc_expr_attr (base->expr).class_ok) | |
3945 continue; | |
3946 derived = CLASS_DATA (base->expr)->ts.u.derived; | |
3947 } | |
3948 else | |
3949 derived = base->expr->ts.u.derived; | |
3950 | |
3951 if (op == INTRINSIC_USER) | |
3952 { | |
3953 gfc_symtree* tb_uop; | |
3954 | |
3955 gcc_assert (uop); | |
3956 tb_uop = gfc_find_typebound_user_op (derived, &result, uop, | |
3957 false, NULL); | |
3958 | |
3959 if (tb_uop) | |
3960 tb = tb_uop->n.tb; | |
3961 else | |
3962 tb = NULL; | |
3963 } | |
3964 else | |
3965 tb = gfc_find_typebound_intrinsic_op (derived, &result, op, | |
3966 false, NULL); | |
3967 | |
3968 /* This means we hit a PRIVATE operator which is use-associated and | |
3969 should thus not be seen. */ | |
3970 if (!result) | |
3971 tb = NULL; | |
3972 | |
3973 /* Look through the super-type hierarchy for a matching specific | |
3974 binding. */ | |
3975 for (; tb; tb = tb->overridden) | |
3976 { | |
3977 gfc_tbp_generic* g; | |
3978 | |
3979 gcc_assert (tb->is_generic); | |
3980 for (g = tb->u.generic; g; g = g->next) | |
3981 { | |
3982 gfc_symbol* target; | |
3983 gfc_actual_arglist* argcopy; | |
3984 bool matches; | |
3985 | |
3986 gcc_assert (g->specific); | |
3987 if (g->specific->error) | |
3988 continue; | |
3989 | |
3990 target = g->specific->u.specific->n.sym; | |
3991 | |
3992 /* Check if this arglist matches the formal. */ | |
3993 argcopy = gfc_copy_actual_arglist (args); | |
3994 matches = gfc_arglist_matches_symbol (&argcopy, target); | |
3995 gfc_free_actual_arglist (argcopy); | |
3996 | |
3997 /* Return if we found a match. */ | |
3998 if (matches) | |
3999 { | |
4000 *tb_base = base->expr; | |
4001 *gname = g->specific_st->name; | |
4002 return g->specific; | |
4003 } | |
4004 } | |
4005 } | |
4006 } | |
4007 | |
4008 return NULL; | |
4009 } | |
4010 | |
4011 | |
4012 /* For the 'actual arglist' of an operator call and a specific typebound | |
4013 procedure that has been found the target of a type-bound operator, build the | |
4014 appropriate EXPR_COMPCALL and resolve it. We take this indirection over | |
4015 type-bound procedures rather than resolving type-bound operators 'directly' | |
4016 so that we can reuse the existing logic. */ | |
4017 | |
4018 static void | |
4019 build_compcall_for_operator (gfc_expr* e, gfc_actual_arglist* actual, | |
4020 gfc_expr* base, gfc_typebound_proc* target, | |
4021 const char *gname) | |
4022 { | |
4023 e->expr_type = EXPR_COMPCALL; | |
4024 e->value.compcall.tbp = target; | |
4025 e->value.compcall.name = gname ? gname : "$op"; | |
4026 e->value.compcall.actual = actual; | |
4027 e->value.compcall.base_object = base; | |
4028 e->value.compcall.ignore_pass = 1; | |
4029 e->value.compcall.assign = 0; | |
4030 if (e->ts.type == BT_UNKNOWN | |
4031 && target->function) | |
4032 { | |
4033 if (target->is_generic) | |
4034 e->ts = target->u.generic->specific->u.specific->n.sym->ts; | |
4035 else | |
4036 e->ts = target->u.specific->n.sym->ts; | |
4037 } | |
4038 } | |
4039 | |
4040 | |
4041 /* This subroutine is called when an expression is being resolved. | |
4042 The expression node in question is either a user defined operator | |
4043 or an intrinsic operator with arguments that aren't compatible | |
4044 with the operator. This subroutine builds an actual argument list | |
4045 corresponding to the operands, then searches for a compatible | |
4046 interface. If one is found, the expression node is replaced with | |
4047 the appropriate function call. We use the 'match' enum to specify | |
4048 whether a replacement has been made or not, or if an error occurred. */ | |
4049 | |
4050 match | |
4051 gfc_extend_expr (gfc_expr *e) | |
4052 { | |
4053 gfc_actual_arglist *actual; | |
4054 gfc_symbol *sym; | |
4055 gfc_namespace *ns; | |
4056 gfc_user_op *uop; | |
4057 gfc_intrinsic_op i; | |
4058 const char *gname; | |
4059 gfc_typebound_proc* tbo; | |
4060 gfc_expr* tb_base; | |
4061 | |
4062 sym = NULL; | |
4063 | |
4064 actual = gfc_get_actual_arglist (); | |
4065 actual->expr = e->value.op.op1; | |
4066 | |
4067 gname = NULL; | |
4068 | |
4069 if (e->value.op.op2 != NULL) | |
4070 { | |
4071 actual->next = gfc_get_actual_arglist (); | |
4072 actual->next->expr = e->value.op.op2; | |
4073 } | |
4074 | |
4075 i = fold_unary_intrinsic (e->value.op.op); | |
4076 | |
4077 /* See if we find a matching type-bound operator. */ | |
4078 if (i == INTRINSIC_USER) | |
4079 tbo = matching_typebound_op (&tb_base, actual, | |
4080 i, e->value.op.uop->name, &gname); | |
4081 else | |
4082 switch (i) | |
4083 { | |
4084 #define CHECK_OS_COMPARISON(comp) \ | |
4085 case INTRINSIC_##comp: \ | |
4086 case INTRINSIC_##comp##_OS: \ | |
4087 tbo = matching_typebound_op (&tb_base, actual, \ | |
4088 INTRINSIC_##comp, NULL, &gname); \ | |
4089 if (!tbo) \ | |
4090 tbo = matching_typebound_op (&tb_base, actual, \ | |
4091 INTRINSIC_##comp##_OS, NULL, &gname); \ | |
4092 break; | |
4093 CHECK_OS_COMPARISON(EQ) | |
4094 CHECK_OS_COMPARISON(NE) | |
4095 CHECK_OS_COMPARISON(GT) | |
4096 CHECK_OS_COMPARISON(GE) | |
4097 CHECK_OS_COMPARISON(LT) | |
4098 CHECK_OS_COMPARISON(LE) | |
4099 #undef CHECK_OS_COMPARISON | |
4100 | |
4101 default: | |
4102 tbo = matching_typebound_op (&tb_base, actual, i, NULL, &gname); | |
4103 break; | |
4104 } | |
4105 | |
4106 /* If there is a matching typebound-operator, replace the expression with | |
4107 a call to it and succeed. */ | |
4108 if (tbo) | |
4109 { | |
4110 gcc_assert (tb_base); | |
4111 build_compcall_for_operator (e, actual, tb_base, tbo, gname); | |
4112 | |
4113 if (!gfc_resolve_expr (e)) | |
4114 return MATCH_ERROR; | |
4115 else | |
4116 return MATCH_YES; | |
4117 } | |
4118 | |
4119 if (i == INTRINSIC_USER) | |
4120 { | |
4121 for (ns = gfc_current_ns; ns; ns = ns->parent) | |
4122 { | |
4123 uop = gfc_find_uop (e->value.op.uop->name, ns); | |
4124 if (uop == NULL) | |
4125 continue; | |
4126 | |
4127 sym = gfc_search_interface (uop->op, 0, &actual); | |
4128 if (sym != NULL) | |
4129 break; | |
4130 } | |
4131 } | |
4132 else | |
4133 { | |
4134 for (ns = gfc_current_ns; ns; ns = ns->parent) | |
4135 { | |
4136 /* Due to the distinction between '==' and '.eq.' and friends, one has | |
4137 to check if either is defined. */ | |
4138 switch (i) | |
4139 { | |
4140 #define CHECK_OS_COMPARISON(comp) \ | |
4141 case INTRINSIC_##comp: \ | |
4142 case INTRINSIC_##comp##_OS: \ | |
4143 sym = gfc_search_interface (ns->op[INTRINSIC_##comp], 0, &actual); \ | |
4144 if (!sym) \ | |
4145 sym = gfc_search_interface (ns->op[INTRINSIC_##comp##_OS], 0, &actual); \ | |
4146 break; | |
4147 CHECK_OS_COMPARISON(EQ) | |
4148 CHECK_OS_COMPARISON(NE) | |
4149 CHECK_OS_COMPARISON(GT) | |
4150 CHECK_OS_COMPARISON(GE) | |
4151 CHECK_OS_COMPARISON(LT) | |
4152 CHECK_OS_COMPARISON(LE) | |
4153 #undef CHECK_OS_COMPARISON | |
4154 | |
4155 default: | |
4156 sym = gfc_search_interface (ns->op[i], 0, &actual); | |
4157 } | |
4158 | |
4159 if (sym != NULL) | |
4160 break; | |
4161 } | |
4162 } | |
4163 | |
4164 /* TODO: Do an ambiguity-check and error if multiple matching interfaces are | |
4165 found rather than just taking the first one and not checking further. */ | |
4166 | |
4167 if (sym == NULL) | |
4168 { | |
4169 /* Don't use gfc_free_actual_arglist(). */ | |
4170 free (actual->next); | |
4171 free (actual); | |
4172 return MATCH_NO; | |
4173 } | |
4174 | |
4175 /* Change the expression node to a function call. */ | |
4176 e->expr_type = EXPR_FUNCTION; | |
4177 e->symtree = gfc_find_sym_in_symtree (sym); | |
4178 e->value.function.actual = actual; | |
4179 e->value.function.esym = NULL; | |
4180 e->value.function.isym = NULL; | |
4181 e->value.function.name = NULL; | |
4182 e->user_operator = 1; | |
4183 | |
4184 if (!gfc_resolve_expr (e)) | |
4185 return MATCH_ERROR; | |
4186 | |
4187 return MATCH_YES; | |
4188 } | |
4189 | |
4190 | |
4191 /* Tries to replace an assignment code node with a subroutine call to the | |
4192 subroutine associated with the assignment operator. Return true if the node | |
4193 was replaced. On false, no error is generated. */ | |
4194 | |
4195 bool | |
4196 gfc_extend_assign (gfc_code *c, gfc_namespace *ns) | |
4197 { | |
4198 gfc_actual_arglist *actual; | |
4199 gfc_expr *lhs, *rhs, *tb_base; | |
4200 gfc_symbol *sym = NULL; | |
4201 const char *gname = NULL; | |
4202 gfc_typebound_proc* tbo; | |
4203 | |
4204 lhs = c->expr1; | |
4205 rhs = c->expr2; | |
4206 | |
4207 /* Don't allow an intrinsic assignment to be replaced. */ | |
4208 if (lhs->ts.type != BT_DERIVED && lhs->ts.type != BT_CLASS | |
4209 && (rhs->rank == 0 || rhs->rank == lhs->rank) | |
4210 && (lhs->ts.type == rhs->ts.type | |
4211 || (gfc_numeric_ts (&lhs->ts) && gfc_numeric_ts (&rhs->ts)))) | |
4212 return false; | |
4213 | |
4214 actual = gfc_get_actual_arglist (); | |
4215 actual->expr = lhs; | |
4216 | |
4217 actual->next = gfc_get_actual_arglist (); | |
4218 actual->next->expr = rhs; | |
4219 | |
4220 /* TODO: Ambiguity-check, see above for gfc_extend_expr. */ | |
4221 | |
4222 /* See if we find a matching type-bound assignment. */ | |
4223 tbo = matching_typebound_op (&tb_base, actual, INTRINSIC_ASSIGN, | |
4224 NULL, &gname); | |
4225 | |
4226 if (tbo) | |
4227 { | |
4228 /* Success: Replace the expression with a type-bound call. */ | |
4229 gcc_assert (tb_base); | |
4230 c->expr1 = gfc_get_expr (); | |
4231 build_compcall_for_operator (c->expr1, actual, tb_base, tbo, gname); | |
4232 c->expr1->value.compcall.assign = 1; | |
4233 c->expr1->where = c->loc; | |
4234 c->expr2 = NULL; | |
4235 c->op = EXEC_COMPCALL; | |
4236 return true; | |
4237 } | |
4238 | |
4239 /* See if we find an 'ordinary' (non-typebound) assignment procedure. */ | |
4240 for (; ns; ns = ns->parent) | |
4241 { | |
4242 sym = gfc_search_interface (ns->op[INTRINSIC_ASSIGN], 1, &actual); | |
4243 if (sym != NULL) | |
4244 break; | |
4245 } | |
4246 | |
4247 if (sym) | |
4248 { | |
4249 /* Success: Replace the assignment with the call. */ | |
4250 c->op = EXEC_ASSIGN_CALL; | |
4251 c->symtree = gfc_find_sym_in_symtree (sym); | |
4252 c->expr1 = NULL; | |
4253 c->expr2 = NULL; | |
4254 c->ext.actual = actual; | |
4255 return true; | |
4256 } | |
4257 | |
4258 /* Failure: No assignment procedure found. */ | |
4259 free (actual->next); | |
4260 free (actual); | |
4261 return false; | |
4262 } | |
4263 | |
4264 | |
4265 /* Make sure that the interface just parsed is not already present in | |
4266 the given interface list. Ambiguity isn't checked yet since module | |
4267 procedures can be present without interfaces. */ | |
4268 | |
4269 bool | |
4270 gfc_check_new_interface (gfc_interface *base, gfc_symbol *new_sym, locus loc) | |
4271 { | |
4272 gfc_interface *ip; | |
4273 | |
4274 for (ip = base; ip; ip = ip->next) | |
4275 { | |
4276 if (ip->sym == new_sym) | |
4277 { | |
4278 gfc_error ("Entity %qs at %L is already present in the interface", | |
4279 new_sym->name, &loc); | |
4280 return false; | |
4281 } | |
4282 } | |
4283 | |
4284 return true; | |
4285 } | |
4286 | |
4287 | |
4288 /* Add a symbol to the current interface. */ | |
4289 | |
4290 bool | |
4291 gfc_add_interface (gfc_symbol *new_sym) | |
4292 { | |
4293 gfc_interface **head, *intr; | |
4294 gfc_namespace *ns; | |
4295 gfc_symbol *sym; | |
4296 | |
4297 switch (current_interface.type) | |
4298 { | |
4299 case INTERFACE_NAMELESS: | |
4300 case INTERFACE_ABSTRACT: | |
4301 return true; | |
4302 | |
4303 case INTERFACE_INTRINSIC_OP: | |
4304 for (ns = current_interface.ns; ns; ns = ns->parent) | |
4305 switch (current_interface.op) | |
4306 { | |
4307 case INTRINSIC_EQ: | |
4308 case INTRINSIC_EQ_OS: | |
4309 if (!gfc_check_new_interface (ns->op[INTRINSIC_EQ], new_sym, | |
4310 gfc_current_locus) | |
4311 || !gfc_check_new_interface (ns->op[INTRINSIC_EQ_OS], | |
4312 new_sym, gfc_current_locus)) | |
4313 return false; | |
4314 break; | |
4315 | |
4316 case INTRINSIC_NE: | |
4317 case INTRINSIC_NE_OS: | |
4318 if (!gfc_check_new_interface (ns->op[INTRINSIC_NE], new_sym, | |
4319 gfc_current_locus) | |
4320 || !gfc_check_new_interface (ns->op[INTRINSIC_NE_OS], | |
4321 new_sym, gfc_current_locus)) | |
4322 return false; | |
4323 break; | |
4324 | |
4325 case INTRINSIC_GT: | |
4326 case INTRINSIC_GT_OS: | |
4327 if (!gfc_check_new_interface (ns->op[INTRINSIC_GT], | |
4328 new_sym, gfc_current_locus) | |
4329 || !gfc_check_new_interface (ns->op[INTRINSIC_GT_OS], | |
4330 new_sym, gfc_current_locus)) | |
4331 return false; | |
4332 break; | |
4333 | |
4334 case INTRINSIC_GE: | |
4335 case INTRINSIC_GE_OS: | |
4336 if (!gfc_check_new_interface (ns->op[INTRINSIC_GE], | |
4337 new_sym, gfc_current_locus) | |
4338 || !gfc_check_new_interface (ns->op[INTRINSIC_GE_OS], | |
4339 new_sym, gfc_current_locus)) | |
4340 return false; | |
4341 break; | |
4342 | |
4343 case INTRINSIC_LT: | |
4344 case INTRINSIC_LT_OS: | |
4345 if (!gfc_check_new_interface (ns->op[INTRINSIC_LT], | |
4346 new_sym, gfc_current_locus) | |
4347 || !gfc_check_new_interface (ns->op[INTRINSIC_LT_OS], | |
4348 new_sym, gfc_current_locus)) | |
4349 return false; | |
4350 break; | |
4351 | |
4352 case INTRINSIC_LE: | |
4353 case INTRINSIC_LE_OS: | |
4354 if (!gfc_check_new_interface (ns->op[INTRINSIC_LE], | |
4355 new_sym, gfc_current_locus) | |
4356 || !gfc_check_new_interface (ns->op[INTRINSIC_LE_OS], | |
4357 new_sym, gfc_current_locus)) | |
4358 return false; | |
4359 break; | |
4360 | |
4361 default: | |
4362 if (!gfc_check_new_interface (ns->op[current_interface.op], | |
4363 new_sym, gfc_current_locus)) | |
4364 return false; | |
4365 } | |
4366 | |
4367 head = ¤t_interface.ns->op[current_interface.op]; | |
4368 break; | |
4369 | |
4370 case INTERFACE_GENERIC: | |
4371 case INTERFACE_DTIO: | |
4372 for (ns = current_interface.ns; ns; ns = ns->parent) | |
4373 { | |
4374 gfc_find_symbol (current_interface.sym->name, ns, 0, &sym); | |
4375 if (sym == NULL) | |
4376 continue; | |
4377 | |
4378 if (!gfc_check_new_interface (sym->generic, | |
4379 new_sym, gfc_current_locus)) | |
4380 return false; | |
4381 } | |
4382 | |
4383 head = ¤t_interface.sym->generic; | |
4384 break; | |
4385 | |
4386 case INTERFACE_USER_OP: | |
4387 if (!gfc_check_new_interface (current_interface.uop->op, | |
4388 new_sym, gfc_current_locus)) | |
4389 return false; | |
4390 | |
4391 head = ¤t_interface.uop->op; | |
4392 break; | |
4393 | |
4394 default: | |
4395 gfc_internal_error ("gfc_add_interface(): Bad interface type"); | |
4396 } | |
4397 | |
4398 intr = gfc_get_interface (); | |
4399 intr->sym = new_sym; | |
4400 intr->where = gfc_current_locus; | |
4401 | |
4402 intr->next = *head; | |
4403 *head = intr; | |
4404 | |
4405 return true; | |
4406 } | |
4407 | |
4408 | |
4409 gfc_interface * | |
4410 gfc_current_interface_head (void) | |
4411 { | |
4412 switch (current_interface.type) | |
4413 { | |
4414 case INTERFACE_INTRINSIC_OP: | |
4415 return current_interface.ns->op[current_interface.op]; | |
4416 | |
4417 case INTERFACE_GENERIC: | |
4418 case INTERFACE_DTIO: | |
4419 return current_interface.sym->generic; | |
4420 | |
4421 case INTERFACE_USER_OP: | |
4422 return current_interface.uop->op; | |
4423 | |
4424 default: | |
4425 gcc_unreachable (); | |
4426 } | |
4427 } | |
4428 | |
4429 | |
4430 void | |
4431 gfc_set_current_interface_head (gfc_interface *i) | |
4432 { | |
4433 switch (current_interface.type) | |
4434 { | |
4435 case INTERFACE_INTRINSIC_OP: | |
4436 current_interface.ns->op[current_interface.op] = i; | |
4437 break; | |
4438 | |
4439 case INTERFACE_GENERIC: | |
4440 case INTERFACE_DTIO: | |
4441 current_interface.sym->generic = i; | |
4442 break; | |
4443 | |
4444 case INTERFACE_USER_OP: | |
4445 current_interface.uop->op = i; | |
4446 break; | |
4447 | |
4448 default: | |
4449 gcc_unreachable (); | |
4450 } | |
4451 } | |
4452 | |
4453 | |
4454 /* Gets rid of a formal argument list. We do not free symbols. | |
4455 Symbols are freed when a namespace is freed. */ | |
4456 | |
4457 void | |
4458 gfc_free_formal_arglist (gfc_formal_arglist *p) | |
4459 { | |
4460 gfc_formal_arglist *q; | |
4461 | |
4462 for (; p; p = q) | |
4463 { | |
4464 q = p->next; | |
4465 free (p); | |
4466 } | |
4467 } | |
4468 | |
4469 | |
4470 /* Check that it is ok for the type-bound procedure 'proc' to override the | |
4471 procedure 'old', cf. F08:4.5.7.3. */ | |
4472 | |
4473 bool | |
4474 gfc_check_typebound_override (gfc_symtree* proc, gfc_symtree* old) | |
4475 { | |
4476 locus where; | |
4477 gfc_symbol *proc_target, *old_target; | |
4478 unsigned proc_pass_arg, old_pass_arg, argpos; | |
4479 gfc_formal_arglist *proc_formal, *old_formal; | |
4480 bool check_type; | |
4481 char err[200]; | |
4482 | |
4483 /* This procedure should only be called for non-GENERIC proc. */ | |
4484 gcc_assert (!proc->n.tb->is_generic); | |
4485 | |
4486 /* If the overwritten procedure is GENERIC, this is an error. */ | |
4487 if (old->n.tb->is_generic) | |
4488 { | |
4489 gfc_error ("Can't overwrite GENERIC %qs at %L", | |
4490 old->name, &proc->n.tb->where); | |
4491 return false; | |
4492 } | |
4493 | |
4494 where = proc->n.tb->where; | |
4495 proc_target = proc->n.tb->u.specific->n.sym; | |
4496 old_target = old->n.tb->u.specific->n.sym; | |
4497 | |
4498 /* Check that overridden binding is not NON_OVERRIDABLE. */ | |
4499 if (old->n.tb->non_overridable) | |
4500 { | |
4501 gfc_error ("%qs at %L overrides a procedure binding declared" | |
4502 " NON_OVERRIDABLE", proc->name, &where); | |
4503 return false; | |
4504 } | |
4505 | |
4506 /* It's an error to override a non-DEFERRED procedure with a DEFERRED one. */ | |
4507 if (!old->n.tb->deferred && proc->n.tb->deferred) | |
4508 { | |
4509 gfc_error ("%qs at %L must not be DEFERRED as it overrides a" | |
4510 " non-DEFERRED binding", proc->name, &where); | |
4511 return false; | |
4512 } | |
4513 | |
4514 /* If the overridden binding is PURE, the overriding must be, too. */ | |
4515 if (old_target->attr.pure && !proc_target->attr.pure) | |
4516 { | |
4517 gfc_error ("%qs at %L overrides a PURE procedure and must also be PURE", | |
4518 proc->name, &where); | |
4519 return false; | |
4520 } | |
4521 | |
4522 /* If the overridden binding is ELEMENTAL, the overriding must be, too. If it | |
4523 is not, the overriding must not be either. */ | |
4524 if (old_target->attr.elemental && !proc_target->attr.elemental) | |
4525 { | |
4526 gfc_error ("%qs at %L overrides an ELEMENTAL procedure and must also be" | |
4527 " ELEMENTAL", proc->name, &where); | |
4528 return false; | |
4529 } | |
4530 if (!old_target->attr.elemental && proc_target->attr.elemental) | |
4531 { | |
4532 gfc_error ("%qs at %L overrides a non-ELEMENTAL procedure and must not" | |
4533 " be ELEMENTAL, either", proc->name, &where); | |
4534 return false; | |
4535 } | |
4536 | |
4537 /* If the overridden binding is a SUBROUTINE, the overriding must also be a | |
4538 SUBROUTINE. */ | |
4539 if (old_target->attr.subroutine && !proc_target->attr.subroutine) | |
4540 { | |
4541 gfc_error ("%qs at %L overrides a SUBROUTINE and must also be a" | |
4542 " SUBROUTINE", proc->name, &where); | |
4543 return false; | |
4544 } | |
4545 | |
4546 /* If the overridden binding is a FUNCTION, the overriding must also be a | |
4547 FUNCTION and have the same characteristics. */ | |
4548 if (old_target->attr.function) | |
4549 { | |
4550 if (!proc_target->attr.function) | |
4551 { | |
4552 gfc_error ("%qs at %L overrides a FUNCTION and must also be a" | |
4553 " FUNCTION", proc->name, &where); | |
4554 return false; | |
4555 } | |
4556 | |
4557 if (!gfc_check_result_characteristics (proc_target, old_target, | |
4558 err, sizeof(err))) | |
4559 { | |
4560 gfc_error ("Result mismatch for the overriding procedure " | |
4561 "%qs at %L: %s", proc->name, &where, err); | |
4562 return false; | |
4563 } | |
4564 } | |
4565 | |
4566 /* If the overridden binding is PUBLIC, the overriding one must not be | |
4567 PRIVATE. */ | |
4568 if (old->n.tb->access == ACCESS_PUBLIC | |
4569 && proc->n.tb->access == ACCESS_PRIVATE) | |
4570 { | |
4571 gfc_error ("%qs at %L overrides a PUBLIC procedure and must not be" | |
4572 " PRIVATE", proc->name, &where); | |
4573 return false; | |
4574 } | |
4575 | |
4576 /* Compare the formal argument lists of both procedures. This is also abused | |
4577 to find the position of the passed-object dummy arguments of both | |
4578 bindings as at least the overridden one might not yet be resolved and we | |
4579 need those positions in the check below. */ | |
4580 proc_pass_arg = old_pass_arg = 0; | |
4581 if (!proc->n.tb->nopass && !proc->n.tb->pass_arg) | |
4582 proc_pass_arg = 1; | |
4583 if (!old->n.tb->nopass && !old->n.tb->pass_arg) | |
4584 old_pass_arg = 1; | |
4585 argpos = 1; | |
4586 proc_formal = gfc_sym_get_dummy_args (proc_target); | |
4587 old_formal = gfc_sym_get_dummy_args (old_target); | |
4588 for ( ; proc_formal && old_formal; | |
4589 proc_formal = proc_formal->next, old_formal = old_formal->next) | |
4590 { | |
4591 if (proc->n.tb->pass_arg | |
4592 && !strcmp (proc->n.tb->pass_arg, proc_formal->sym->name)) | |
4593 proc_pass_arg = argpos; | |
4594 if (old->n.tb->pass_arg | |
4595 && !strcmp (old->n.tb->pass_arg, old_formal->sym->name)) | |
4596 old_pass_arg = argpos; | |
4597 | |
4598 /* Check that the names correspond. */ | |
4599 if (strcmp (proc_formal->sym->name, old_formal->sym->name)) | |
4600 { | |
4601 gfc_error ("Dummy argument %qs of %qs at %L should be named %qs as" | |
4602 " to match the corresponding argument of the overridden" | |
4603 " procedure", proc_formal->sym->name, proc->name, &where, | |
4604 old_formal->sym->name); | |
4605 return false; | |
4606 } | |
4607 | |
4608 check_type = proc_pass_arg != argpos && old_pass_arg != argpos; | |
4609 if (!gfc_check_dummy_characteristics (proc_formal->sym, old_formal->sym, | |
4610 check_type, err, sizeof(err))) | |
4611 { | |
4612 gfc_error_opt (OPT_Wargument_mismatch, | |
4613 "Argument mismatch for the overriding procedure " | |
4614 "%qs at %L: %s", proc->name, &where, err); | |
4615 return false; | |
4616 } | |
4617 | |
4618 ++argpos; | |
4619 } | |
4620 if (proc_formal || old_formal) | |
4621 { | |
4622 gfc_error ("%qs at %L must have the same number of formal arguments as" | |
4623 " the overridden procedure", proc->name, &where); | |
4624 return false; | |
4625 } | |
4626 | |
4627 /* If the overridden binding is NOPASS, the overriding one must also be | |
4628 NOPASS. */ | |
4629 if (old->n.tb->nopass && !proc->n.tb->nopass) | |
4630 { | |
4631 gfc_error ("%qs at %L overrides a NOPASS binding and must also be" | |
4632 " NOPASS", proc->name, &where); | |
4633 return false; | |
4634 } | |
4635 | |
4636 /* If the overridden binding is PASS(x), the overriding one must also be | |
4637 PASS and the passed-object dummy arguments must correspond. */ | |
4638 if (!old->n.tb->nopass) | |
4639 { | |
4640 if (proc->n.tb->nopass) | |
4641 { | |
4642 gfc_error ("%qs at %L overrides a binding with PASS and must also be" | |
4643 " PASS", proc->name, &where); | |
4644 return false; | |
4645 } | |
4646 | |
4647 if (proc_pass_arg != old_pass_arg) | |
4648 { | |
4649 gfc_error ("Passed-object dummy argument of %qs at %L must be at" | |
4650 " the same position as the passed-object dummy argument of" | |
4651 " the overridden procedure", proc->name, &where); | |
4652 return false; | |
4653 } | |
4654 } | |
4655 | |
4656 return true; | |
4657 } | |
4658 | |
4659 | |
4660 /* The following three functions check that the formal arguments | |
4661 of user defined derived type IO procedures are compliant with | |
4662 the requirements of the standard. */ | |
4663 | |
4664 static void | |
4665 check_dtio_arg_TKR_intent (gfc_symbol *fsym, bool typebound, bt type, | |
4666 int kind, int rank, sym_intent intent) | |
4667 { | |
4668 if (fsym->ts.type != type) | |
4669 { | |
4670 gfc_error ("DTIO dummy argument at %L must be of type %s", | |
4671 &fsym->declared_at, gfc_basic_typename (type)); | |
4672 return; | |
4673 } | |
4674 | |
4675 if (fsym->ts.type != BT_CLASS && fsym->ts.type != BT_DERIVED | |
4676 && fsym->ts.kind != kind) | |
4677 gfc_error ("DTIO dummy argument at %L must be of KIND = %d", | |
4678 &fsym->declared_at, kind); | |
4679 | |
4680 if (!typebound | |
4681 && rank == 0 | |
4682 && (((type == BT_CLASS) && CLASS_DATA (fsym)->attr.dimension) | |
4683 || ((type != BT_CLASS) && fsym->attr.dimension))) | |
4684 gfc_error ("DTIO dummy argument at %L must be a scalar", | |
4685 &fsym->declared_at); | |
4686 else if (rank == 1 | |
4687 && (fsym->as == NULL || fsym->as->type != AS_ASSUMED_SHAPE)) | |
4688 gfc_error ("DTIO dummy argument at %L must be an " | |
4689 "ASSUMED SHAPE ARRAY", &fsym->declared_at); | |
4690 | |
4691 if (fsym->attr.intent != intent) | |
4692 gfc_error ("DTIO dummy argument at %L must have INTENT %s", | |
4693 &fsym->declared_at, gfc_code2string (intents, (int)intent)); | |
4694 return; | |
4695 } | |
4696 | |
4697 | |
4698 static void | |
4699 check_dtio_interface1 (gfc_symbol *derived, gfc_symtree *tb_io_st, | |
4700 bool typebound, bool formatted, int code) | |
4701 { | |
4702 gfc_symbol *dtio_sub, *generic_proc, *fsym; | |
4703 gfc_typebound_proc *tb_io_proc, *specific_proc; | |
4704 gfc_interface *intr; | |
4705 gfc_formal_arglist *formal; | |
4706 int arg_num; | |
4707 | |
4708 bool read = ((dtio_codes)code == DTIO_RF) | |
4709 || ((dtio_codes)code == DTIO_RUF); | |
4710 bt type; | |
4711 sym_intent intent; | |
4712 int kind; | |
4713 | |
4714 dtio_sub = NULL; | |
4715 if (typebound) | |
4716 { | |
4717 /* Typebound DTIO binding. */ | |
4718 tb_io_proc = tb_io_st->n.tb; | |
4719 if (tb_io_proc == NULL) | |
4720 return; | |
4721 | |
4722 gcc_assert (tb_io_proc->is_generic); | |
4723 gcc_assert (tb_io_proc->u.generic->next == NULL); | |
4724 | |
4725 specific_proc = tb_io_proc->u.generic->specific; | |
4726 if (specific_proc == NULL || specific_proc->is_generic) | |
4727 return; | |
4728 | |
4729 dtio_sub = specific_proc->u.specific->n.sym; | |
4730 } | |
4731 else | |
4732 { | |
4733 generic_proc = tb_io_st->n.sym; | |
4734 if (generic_proc == NULL || generic_proc->generic == NULL) | |
4735 return; | |
4736 | |
4737 for (intr = tb_io_st->n.sym->generic; intr; intr = intr->next) | |
4738 { | |
4739 if (intr->sym && intr->sym->formal && intr->sym->formal->sym | |
4740 && ((intr->sym->formal->sym->ts.type == BT_CLASS | |
4741 && CLASS_DATA (intr->sym->formal->sym)->ts.u.derived | |
4742 == derived) | |
4743 || (intr->sym->formal->sym->ts.type == BT_DERIVED | |
4744 && intr->sym->formal->sym->ts.u.derived == derived))) | |
4745 { | |
4746 dtio_sub = intr->sym; | |
4747 break; | |
4748 } | |
4749 else if (intr->sym && intr->sym->formal && !intr->sym->formal->sym) | |
4750 { | |
4751 gfc_error ("Alternate return at %L is not permitted in a DTIO " | |
4752 "procedure", &intr->sym->declared_at); | |
4753 return; | |
4754 } | |
4755 } | |
4756 | |
4757 if (dtio_sub == NULL) | |
4758 return; | |
4759 } | |
4760 | |
4761 gcc_assert (dtio_sub); | |
4762 if (!dtio_sub->attr.subroutine) | |
4763 gfc_error ("DTIO procedure %qs at %L must be a subroutine", | |
4764 dtio_sub->name, &dtio_sub->declared_at); | |
4765 | |
4766 arg_num = 0; | |
4767 for (formal = dtio_sub->formal; formal; formal = formal->next) | |
4768 arg_num++; | |
4769 | |
4770 if (arg_num < (formatted ? 6 : 4)) | |
4771 { | |
4772 gfc_error ("Too few dummy arguments in DTIO procedure %qs at %L", | |
4773 dtio_sub->name, &dtio_sub->declared_at); | |
4774 return; | |
4775 } | |
4776 | |
4777 if (arg_num > (formatted ? 6 : 4)) | |
4778 { | |
4779 gfc_error ("Too many dummy arguments in DTIO procedure %qs at %L", | |
4780 dtio_sub->name, &dtio_sub->declared_at); | |
4781 return; | |
4782 } | |
4783 | |
4784 | |
4785 /* Now go through the formal arglist. */ | |
4786 arg_num = 1; | |
4787 for (formal = dtio_sub->formal; formal; formal = formal->next, arg_num++) | |
4788 { | |
4789 if (!formatted && arg_num == 3) | |
4790 arg_num = 5; | |
4791 fsym = formal->sym; | |
4792 | |
4793 if (fsym == NULL) | |
4794 { | |
4795 gfc_error ("Alternate return at %L is not permitted in a DTIO " | |
4796 "procedure", &dtio_sub->declared_at); | |
4797 return; | |
4798 } | |
4799 | |
4800 switch (arg_num) | |
4801 { | |
4802 case(1): /* DTV */ | |
4803 type = derived->attr.sequence || derived->attr.is_bind_c ? | |
4804 BT_DERIVED : BT_CLASS; | |
4805 kind = 0; | |
4806 intent = read ? INTENT_INOUT : INTENT_IN; | |
4807 check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
4808 0, intent); | |
4809 break; | |
4810 | |
4811 case(2): /* UNIT */ | |
4812 type = BT_INTEGER; | |
4813 kind = gfc_default_integer_kind; | |
4814 intent = INTENT_IN; | |
4815 check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
4816 0, intent); | |
4817 break; | |
4818 case(3): /* IOTYPE */ | |
4819 type = BT_CHARACTER; | |
4820 kind = gfc_default_character_kind; | |
4821 intent = INTENT_IN; | |
4822 check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
4823 0, intent); | |
4824 break; | |
4825 case(4): /* VLIST */ | |
4826 type = BT_INTEGER; | |
4827 kind = gfc_default_integer_kind; | |
4828 intent = INTENT_IN; | |
4829 check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
4830 1, intent); | |
4831 break; | |
4832 case(5): /* IOSTAT */ | |
4833 type = BT_INTEGER; | |
4834 kind = gfc_default_integer_kind; | |
4835 intent = INTENT_OUT; | |
4836 check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
4837 0, intent); | |
4838 break; | |
4839 case(6): /* IOMSG */ | |
4840 type = BT_CHARACTER; | |
4841 kind = gfc_default_character_kind; | |
4842 intent = INTENT_INOUT; | |
4843 check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
4844 0, intent); | |
4845 break; | |
4846 default: | |
4847 gcc_unreachable (); | |
4848 } | |
4849 } | |
4850 derived->attr.has_dtio_procs = 1; | |
4851 return; | |
4852 } | |
4853 | |
4854 void | |
4855 gfc_check_dtio_interfaces (gfc_symbol *derived) | |
4856 { | |
4857 gfc_symtree *tb_io_st; | |
4858 bool t = false; | |
4859 int code; | |
4860 bool formatted; | |
4861 | |
4862 if (derived->attr.is_class == 1 || derived->attr.vtype == 1) | |
4863 return; | |
4864 | |
4865 /* Check typebound DTIO bindings. */ | |
4866 for (code = 0; code < 4; code++) | |
4867 { | |
4868 formatted = ((dtio_codes)code == DTIO_RF) | |
4869 || ((dtio_codes)code == DTIO_WF); | |
4870 | |
4871 tb_io_st = gfc_find_typebound_proc (derived, &t, | |
4872 gfc_code2string (dtio_procs, code), | |
4873 true, &derived->declared_at); | |
4874 if (tb_io_st != NULL) | |
4875 check_dtio_interface1 (derived, tb_io_st, true, formatted, code); | |
4876 } | |
4877 | |
4878 /* Check generic DTIO interfaces. */ | |
4879 for (code = 0; code < 4; code++) | |
4880 { | |
4881 formatted = ((dtio_codes)code == DTIO_RF) | |
4882 || ((dtio_codes)code == DTIO_WF); | |
4883 | |
4884 tb_io_st = gfc_find_symtree (derived->ns->sym_root, | |
4885 gfc_code2string (dtio_procs, code)); | |
4886 if (tb_io_st != NULL) | |
4887 check_dtio_interface1 (derived, tb_io_st, false, formatted, code); | |
4888 } | |
4889 } | |
4890 | |
4891 | |
4892 gfc_symtree* | |
4893 gfc_find_typebound_dtio_proc (gfc_symbol *derived, bool write, bool formatted) | |
4894 { | |
4895 gfc_symtree *tb_io_st = NULL; | |
4896 bool t = false; | |
4897 | |
4898 if (!derived || !derived->resolved || derived->attr.flavor != FL_DERIVED) | |
4899 return NULL; | |
4900 | |
4901 /* Try to find a typebound DTIO binding. */ | |
4902 if (formatted == true) | |
4903 { | |
4904 if (write == true) | |
4905 tb_io_st = gfc_find_typebound_proc (derived, &t, | |
4906 gfc_code2string (dtio_procs, | |
4907 DTIO_WF), | |
4908 true, | |
4909 &derived->declared_at); | |
4910 else | |
4911 tb_io_st = gfc_find_typebound_proc (derived, &t, | |
4912 gfc_code2string (dtio_procs, | |
4913 DTIO_RF), | |
4914 true, | |
4915 &derived->declared_at); | |
4916 } | |
4917 else | |
4918 { | |
4919 if (write == true) | |
4920 tb_io_st = gfc_find_typebound_proc (derived, &t, | |
4921 gfc_code2string (dtio_procs, | |
4922 DTIO_WUF), | |
4923 true, | |
4924 &derived->declared_at); | |
4925 else | |
4926 tb_io_st = gfc_find_typebound_proc (derived, &t, | |
4927 gfc_code2string (dtio_procs, | |
4928 DTIO_RUF), | |
4929 true, | |
4930 &derived->declared_at); | |
4931 } | |
4932 return tb_io_st; | |
4933 } | |
4934 | |
4935 | |
4936 gfc_symbol * | |
4937 gfc_find_specific_dtio_proc (gfc_symbol *derived, bool write, bool formatted) | |
4938 { | |
4939 gfc_symtree *tb_io_st = NULL; | |
4940 gfc_symbol *dtio_sub = NULL; | |
4941 gfc_symbol *extended; | |
4942 gfc_typebound_proc *tb_io_proc, *specific_proc; | |
4943 | |
4944 tb_io_st = gfc_find_typebound_dtio_proc (derived, write, formatted); | |
4945 | |
4946 if (tb_io_st != NULL) | |
4947 { | |
4948 const char *genname; | |
4949 gfc_symtree *st; | |
4950 | |
4951 tb_io_proc = tb_io_st->n.tb; | |
4952 gcc_assert (tb_io_proc != NULL); | |
4953 gcc_assert (tb_io_proc->is_generic); | |
4954 gcc_assert (tb_io_proc->u.generic->next == NULL); | |
4955 | |
4956 specific_proc = tb_io_proc->u.generic->specific; | |
4957 gcc_assert (!specific_proc->is_generic); | |
4958 | |
4959 /* Go back and make sure that we have the right specific procedure. | |
4960 Here we most likely have a procedure from the parent type, which | |
4961 can be overridden in extensions. */ | |
4962 genname = tb_io_proc->u.generic->specific_st->name; | |
4963 st = gfc_find_typebound_proc (derived, NULL, genname, | |
4964 true, &tb_io_proc->where); | |
4965 if (st) | |
4966 dtio_sub = st->n.tb->u.specific->n.sym; | |
4967 else | |
4968 dtio_sub = specific_proc->u.specific->n.sym; | |
4969 | |
4970 goto finish; | |
4971 } | |
4972 | |
4973 /* If there is not a typebound binding, look for a generic | |
4974 DTIO interface. */ | |
4975 for (extended = derived; extended; | |
4976 extended = gfc_get_derived_super_type (extended)) | |
4977 { | |
4978 if (extended == NULL || extended->ns == NULL | |
4979 || extended->attr.flavor == FL_UNKNOWN) | |
4980 return NULL; | |
4981 | |
4982 if (formatted == true) | |
4983 { | |
4984 if (write == true) | |
4985 tb_io_st = gfc_find_symtree (extended->ns->sym_root, | |
4986 gfc_code2string (dtio_procs, | |
4987 DTIO_WF)); | |
4988 else | |
4989 tb_io_st = gfc_find_symtree (extended->ns->sym_root, | |
4990 gfc_code2string (dtio_procs, | |
4991 DTIO_RF)); | |
4992 } | |
4993 else | |
4994 { | |
4995 if (write == true) | |
4996 tb_io_st = gfc_find_symtree (extended->ns->sym_root, | |
4997 gfc_code2string (dtio_procs, | |
4998 DTIO_WUF)); | |
4999 else | |
5000 tb_io_st = gfc_find_symtree (extended->ns->sym_root, | |
5001 gfc_code2string (dtio_procs, | |
5002 DTIO_RUF)); | |
5003 } | |
5004 | |
5005 if (tb_io_st != NULL | |
5006 && tb_io_st->n.sym | |
5007 && tb_io_st->n.sym->generic) | |
5008 { | |
5009 for (gfc_interface *intr = tb_io_st->n.sym->generic; | |
5010 intr && intr->sym; intr = intr->next) | |
5011 { | |
5012 if (intr->sym->formal) | |
5013 { | |
5014 gfc_symbol *fsym = intr->sym->formal->sym; | |
5015 if ((fsym->ts.type == BT_CLASS | |
5016 && CLASS_DATA (fsym)->ts.u.derived == extended) | |
5017 || (fsym->ts.type == BT_DERIVED | |
5018 && fsym->ts.u.derived == extended)) | |
5019 { | |
5020 dtio_sub = intr->sym; | |
5021 break; | |
5022 } | |
5023 } | |
5024 } | |
5025 } | |
5026 } | |
5027 | |
5028 finish: | |
5029 if (dtio_sub && derived != CLASS_DATA (dtio_sub->formal->sym)->ts.u.derived) | |
5030 gfc_find_derived_vtab (derived); | |
5031 | |
5032 return dtio_sub; | |
5033 } |