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6de9cd9a | 1 | /* Deal with interfaces. |
85ec4feb | 2 | Copyright (C) 2000-2018 Free Software Foundation, Inc. |
6de9cd9a DN |
3 | Contributed by Andy Vaught |
4 | ||
9fc4d79b | 5 | This file is part of GCC. |
6de9cd9a | 6 | |
9fc4d79b TS |
7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free | |
d234d788 | 9 | Software Foundation; either version 3, or (at your option) any later |
9fc4d79b | 10 | version. |
6de9cd9a | 11 | |
9fc4d79b TS |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
6de9cd9a DN |
16 | |
17 | You should have received a copy of the GNU General Public License | |
d234d788 NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a DN |
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 | |
6892757c | 43 | has an explicit interface. Each explicit interface has its own |
6de9cd9a DN |
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" | |
d22e4895 | 67 | #include "system.h" |
953bee7c | 68 | #include "coretypes.h" |
1916bcb5 | 69 | #include "options.h" |
6de9cd9a DN |
70 | #include "gfortran.h" |
71 | #include "match.h" | |
97f26732 | 72 | #include "arith.h" |
6de9cd9a | 73 | |
6de9cd9a DN |
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 | |
b251af97 | 84 | gfc_free_interface (gfc_interface *intr) |
6de9cd9a DN |
85 | { |
86 | gfc_interface *next; | |
87 | ||
88 | for (; intr; intr = next) | |
89 | { | |
90 | next = intr->next; | |
cede9502 | 91 | free (intr); |
6de9cd9a DN |
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 | |
e8d4f3fc | 100 | fold_unary_intrinsic (gfc_intrinsic_op op) |
6de9cd9a | 101 | { |
a1ee985f | 102 | switch (op) |
6de9cd9a DN |
103 | { |
104 | case INTRINSIC_UPLUS: | |
a1ee985f | 105 | op = INTRINSIC_PLUS; |
6de9cd9a DN |
106 | break; |
107 | case INTRINSIC_UMINUS: | |
a1ee985f | 108 | op = INTRINSIC_MINUS; |
6de9cd9a DN |
109 | break; |
110 | default: | |
111 | break; | |
112 | } | |
113 | ||
a1ee985f | 114 | return op; |
6de9cd9a DN |
115 | } |
116 | ||
117 | ||
195d1431 PT |
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. */ | |
e73d3ca6 PT |
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 | ||
6de9cd9a | 133 | /* Match a generic specification. Depending on which type of |
a1ee985f | 134 | interface is found, the 'name' or 'op' pointers may be set. |
6de9cd9a DN |
135 | This subroutine doesn't return MATCH_NO. */ |
136 | ||
137 | match | |
b251af97 | 138 | gfc_match_generic_spec (interface_type *type, |
6de9cd9a | 139 | char *name, |
a1ee985f | 140 | gfc_intrinsic_op *op) |
6de9cd9a DN |
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; | |
a1ee985f | 149 | *op = INTRINSIC_ASSIGN; |
6de9cd9a DN |
150 | return MATCH_YES; |
151 | } | |
152 | ||
153 | if (gfc_match (" operator ( %o )", &i) == MATCH_YES) | |
154 | { /* Operator i/f */ | |
155 | *type = INTERFACE_INTRINSIC_OP; | |
e8d4f3fc | 156 | *op = fold_unary_intrinsic (i); |
6de9cd9a DN |
157 | return MATCH_YES; |
158 | } | |
159 | ||
e8d4f3fc | 160 | *op = INTRINSIC_NONE; |
6de9cd9a DN |
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 | ||
e73d3ca6 PT |
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 | ||
6de9cd9a DN |
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 | ||
9e1d712c TB |
230 | /* Match one of the five F95 forms of an interface statement. The |
231 | matcher for the abstract interface follows. */ | |
6de9cd9a DN |
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; | |
a1ee985f | 239 | gfc_intrinsic_op op; |
6de9cd9a DN |
240 | match m; |
241 | ||
242 | m = gfc_match_space (); | |
243 | ||
a1ee985f | 244 | if (gfc_match_generic_spec (&type, name, &op) == MATCH_ERROR) |
6de9cd9a DN |
245 | return MATCH_ERROR; |
246 | ||
6de9cd9a DN |
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 | |
b251af97 | 250 | || (type != INTERFACE_NAMELESS && m != MATCH_YES)) |
6de9cd9a | 251 | { |
b251af97 SK |
252 | gfc_error ("Syntax error: Trailing garbage in INTERFACE statement " |
253 | "at %C"); | |
6de9cd9a DN |
254 | return MATCH_ERROR; |
255 | } | |
256 | ||
257 | current_interface.type = type; | |
258 | ||
259 | switch (type) | |
260 | { | |
e73d3ca6 | 261 | case INTERFACE_DTIO: |
6de9cd9a DN |
262 | case INTERFACE_GENERIC: |
263 | if (gfc_get_symbol (name, NULL, &sym)) | |
264 | return MATCH_ERROR; | |
265 | ||
8b704316 | 266 | if (!sym->attr.generic |
524af0d6 | 267 | && !gfc_add_generic (&sym->attr, sym->name, NULL)) |
6de9cd9a DN |
268 | return MATCH_ERROR; |
269 | ||
e5d7f6f7 FXC |
270 | if (sym->attr.dummy) |
271 | { | |
c4100eae | 272 | gfc_error ("Dummy procedure %qs at %C cannot have a " |
e5d7f6f7 FXC |
273 | "generic interface", sym->name); |
274 | return MATCH_ERROR; | |
275 | } | |
276 | ||
6de9cd9a DN |
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: | |
a1ee985f | 285 | current_interface.op = op; |
6de9cd9a DN |
286 | break; |
287 | ||
288 | case INTERFACE_NAMELESS: | |
9e1d712c | 289 | case INTERFACE_ABSTRACT: |
6de9cd9a DN |
290 | break; |
291 | } | |
292 | ||
293 | return MATCH_YES; | |
294 | } | |
295 | ||
296 | ||
9e1d712c TB |
297 | |
298 | /* Match a F2003 abstract interface. */ | |
299 | ||
300 | match | |
301 | gfc_match_abstract_interface (void) | |
302 | { | |
303 | match m; | |
304 | ||
524af0d6 | 305 | if (!gfc_notify_std (GFC_STD_F2003, "ABSTRACT INTERFACE at %C")) |
9e1d712c TB |
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 | ||
6de9cd9a DN |
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; | |
a1ee985f | 330 | gfc_intrinsic_op op; |
6de9cd9a DN |
331 | match m; |
332 | ||
333 | m = gfc_match_space (); | |
334 | ||
a1ee985f | 335 | if (gfc_match_generic_spec (&type, name, &op) == MATCH_ERROR) |
6de9cd9a DN |
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 | |
b251af97 | 341 | || (type != INTERFACE_NAMELESS && m != MATCH_YES)) |
6de9cd9a | 342 | { |
b251af97 SK |
343 | gfc_error ("Syntax error: Trailing garbage in END INTERFACE " |
344 | "statement at %C"); | |
6de9cd9a DN |
345 | return MATCH_ERROR; |
346 | } | |
347 | ||
348 | m = MATCH_YES; | |
349 | ||
350 | switch (current_interface.type) | |
351 | { | |
352 | case INTERFACE_NAMELESS: | |
9e1d712c TB |
353 | case INTERFACE_ABSTRACT: |
354 | if (type != INTERFACE_NAMELESS) | |
6de9cd9a DN |
355 | { |
356 | gfc_error ("Expected a nameless interface at %C"); | |
357 | m = MATCH_ERROR; | |
358 | } | |
359 | ||
360 | break; | |
361 | ||
362 | case INTERFACE_INTRINSIC_OP: | |
a1ee985f | 363 | if (type != current_interface.type || op != current_interface.op) |
6de9cd9a DN |
364 | { |
365 | ||
366 | if (current_interface.op == INTRINSIC_ASSIGN) | |
c6d6e62f SK |
367 | { |
368 | m = MATCH_ERROR; | |
a4d9b221 | 369 | gfc_error ("Expected %<END INTERFACE ASSIGNMENT (=)%> at %C"); |
c6d6e62f | 370 | } |
6de9cd9a | 371 | else |
c6d6e62f | 372 | { |
915acec4 | 373 | const char *s1, *s2; |
c6d6e62f SK |
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. */ | |
524af0d6 JB |
379 | if ((strcmp(s1, "==") == 0 && strcmp (s2, ".eq.") == 0) |
380 | || (strcmp(s1, ".eq.") == 0 && strcmp (s2, "==") == 0)) | |
c6d6e62f | 381 | break; |
524af0d6 JB |
382 | if ((strcmp(s1, "/=") == 0 && strcmp (s2, ".ne.") == 0) |
383 | || (strcmp(s1, ".ne.") == 0 && strcmp (s2, "/=") == 0)) | |
c6d6e62f | 384 | break; |
524af0d6 JB |
385 | if ((strcmp(s1, "<=") == 0 && strcmp (s2, ".le.") == 0) |
386 | || (strcmp(s1, ".le.") == 0 && strcmp (s2, "<=") == 0)) | |
c6d6e62f | 387 | break; |
524af0d6 JB |
388 | if ((strcmp(s1, "<") == 0 && strcmp (s2, ".lt.") == 0) |
389 | || (strcmp(s1, ".lt.") == 0 && strcmp (s2, "<") == 0)) | |
c6d6e62f | 390 | break; |
524af0d6 JB |
391 | if ((strcmp(s1, ">=") == 0 && strcmp (s2, ".ge.") == 0) |
392 | || (strcmp(s1, ".ge.") == 0 && strcmp (s2, ">=") == 0)) | |
c6d6e62f | 393 | break; |
524af0d6 JB |
394 | if ((strcmp(s1, ">") == 0 && strcmp (s2, ".gt.") == 0) |
395 | || (strcmp(s1, ".gt.") == 0 && strcmp (s2, ">") == 0)) | |
c6d6e62f SK |
396 | break; |
397 | ||
398 | m = MATCH_ERROR; | |
898344a9 SK |
399 | if (strcmp(s2, "none") == 0) |
400 | gfc_error ("Expecting %<END INTERFACE OPERATOR (%s)%> " | |
77be9417 | 401 | "at %C", s1); |
e73d3ca6 | 402 | else |
898344a9 | 403 | gfc_error ("Expecting %<END INTERFACE OPERATOR (%s)%> at %C, " |
77be9417 | 404 | "but got %qs", s1, s2); |
c6d6e62f | 405 | } |
8b704316 | 406 | |
6de9cd9a DN |
407 | } |
408 | ||
409 | break; | |
410 | ||
411 | case INTERFACE_USER_OP: | |
412 | /* Comparing the symbol node names is OK because only use-associated | |
b251af97 | 413 | symbols can be renamed. */ |
6de9cd9a | 414 | if (type != current_interface.type |
9b46f94f | 415 | || strcmp (current_interface.uop->name, name) != 0) |
6de9cd9a | 416 | { |
a4d9b221 | 417 | gfc_error ("Expecting %<END INTERFACE OPERATOR (.%s.)%> at %C", |
55898b2c | 418 | current_interface.uop->name); |
6de9cd9a DN |
419 | m = MATCH_ERROR; |
420 | } | |
421 | ||
422 | break; | |
423 | ||
e73d3ca6 | 424 | case INTERFACE_DTIO: |
6de9cd9a DN |
425 | case INTERFACE_GENERIC: |
426 | if (type != current_interface.type | |
427 | || strcmp (current_interface.sym->name, name) != 0) | |
428 | { | |
a4d9b221 | 429 | gfc_error ("Expecting %<END INTERFACE %s%> at %C", |
6de9cd9a DN |
430 | current_interface.sym->name); |
431 | m = MATCH_ERROR; | |
432 | } | |
433 | ||
434 | break; | |
435 | } | |
436 | ||
437 | return m; | |
438 | } | |
439 | ||
440 | ||
5f88e9b2 FR |
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 | ||
f6288c24 FR |
472 | /* Compare components according to 4.4.2 of the Fortran standard. */ |
473 | ||
f3e1097b | 474 | static bool |
f6288c24 FR |
475 | compare_components (gfc_component *cmp1, gfc_component *cmp2, |
476 | gfc_symbol *derived1, gfc_symbol *derived2) | |
477 | { | |
5f88e9b2 FR |
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) | |
f3e1097b | 481 | return false; |
f6288c24 FR |
482 | |
483 | if (cmp1->attr.access != cmp2->attr.access) | |
f3e1097b | 484 | return false; |
f6288c24 FR |
485 | |
486 | if (cmp1->attr.pointer != cmp2->attr.pointer) | |
f3e1097b | 487 | return false; |
f6288c24 FR |
488 | |
489 | if (cmp1->attr.dimension != cmp2->attr.dimension) | |
f3e1097b | 490 | return false; |
f6288c24 FR |
491 | |
492 | if (cmp1->attr.allocatable != cmp2->attr.allocatable) | |
f3e1097b | 493 | return false; |
f6288c24 FR |
494 | |
495 | if (cmp1->attr.dimension && gfc_compare_array_spec (cmp1->as, cmp2->as) == 0) | |
f3e1097b | 496 | return false; |
f6288c24 | 497 | |
56d3a930 FR |
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) | |
f3e1097b | 506 | return false; |
56d3a930 FR |
507 | } |
508 | ||
f6288c24 FR |
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) | |
f3e1097b JW |
513 | && !gfc_compare_types (&cmp1->ts, &cmp2->ts)) |
514 | return false; | |
f6288c24 FR |
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)) | |
f3e1097b | 518 | return false; |
f6288c24 FR |
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)) | |
f3e1097b | 522 | return false; |
f6288c24 | 523 | |
f3e1097b | 524 | return true; |
f6288c24 FR |
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 | ||
f3e1097b JW |
536 | static bool |
537 | compare_union_types (gfc_symbol *un1, gfc_symbol *un2) | |
f6288c24 FR |
538 | { |
539 | gfc_component *map1, *map2, *cmp1, *cmp2; | |
c39747d2 | 540 | gfc_symbol *map1_t, *map2_t; |
f6288c24 FR |
541 | |
542 | if (un1->attr.flavor != FL_UNION || un2->attr.flavor != FL_UNION) | |
f3e1097b | 543 | return false; |
f6288c24 | 544 | |
908b8296 | 545 | if (un1->attr.zero_comp != un2->attr.zero_comp) |
f3e1097b | 546 | return false; |
908b8296 FR |
547 | |
548 | if (un1->attr.zero_comp) | |
f3e1097b | 549 | return true; |
908b8296 | 550 | |
f6288c24 FR |
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 (;;) | |
05b8fcb4 FR |
561 | { |
562 | map1_t = map1->ts.u.derived; | |
563 | map2_t = map2->ts.u.derived; | |
c39747d2 | 564 | |
05b8fcb4 FR |
565 | cmp1 = map1_t->components; |
566 | cmp2 = map2_t->components; | |
c39747d2 | 567 | |
05b8fcb4 FR |
568 | /* Protect against null components. */ |
569 | if (map1_t->attr.zero_comp != map2_t->attr.zero_comp) | |
f3e1097b | 570 | return false; |
c39747d2 | 571 | |
05b8fcb4 | 572 | if (map1_t->attr.zero_comp) |
f3e1097b | 573 | return true; |
c39747d2 | 574 | |
05b8fcb4 FR |
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? */ | |
f3e1097b JW |
581 | if (!compare_components (cmp1, cmp2, map1_t, map2_t)) |
582 | return false; | |
05b8fcb4 FR |
583 | |
584 | cmp1 = cmp1->next; | |
585 | cmp2 = cmp2->next; | |
586 | ||
587 | if (cmp1 == NULL && cmp2 == NULL) | |
588 | break; | |
589 | if (cmp1 == NULL || cmp2 == NULL) | |
f3e1097b | 590 | return false; |
05b8fcb4 | 591 | } |
f6288c24 | 592 | |
05b8fcb4 FR |
593 | map1 = map1->next; |
594 | map2 = map2->next; | |
f6288c24 | 595 | |
05b8fcb4 FR |
596 | if (map1 == NULL && map2 == NULL) |
597 | break; | |
598 | if (map1 == NULL || map2 == NULL) | |
f3e1097b | 599 | return false; |
f6288c24 FR |
600 | } |
601 | ||
f3e1097b | 602 | return true; |
f6288c24 FR |
603 | } |
604 | ||
605 | ||
606 | ||
e0e85e06 PT |
607 | /* Compare two derived types using the criteria in 4.4.2 of the standard, |
608 | recursing through gfc_compare_types for the components. */ | |
6de9cd9a | 609 | |
f3e1097b | 610 | bool |
b251af97 | 611 | gfc_compare_derived_types (gfc_symbol *derived1, gfc_symbol *derived2) |
6de9cd9a | 612 | { |
f6288c24 | 613 | gfc_component *cmp1, *cmp2; |
6de9cd9a | 614 | |
cf2b3c22 | 615 | if (derived1 == derived2) |
f3e1097b | 616 | return true; |
cf2b3c22 | 617 | |
c7082171 SK |
618 | if (!derived1 || !derived2) |
619 | gfc_internal_error ("gfc_compare_derived_types: invalid derived type"); | |
c6423ef3 | 620 | |
00074dd8 FR |
621 | /* Compare UNION types specially. */ |
622 | if (derived1->attr.flavor == FL_UNION || derived2->attr.flavor == FL_UNION) | |
f3e1097b | 623 | return compare_union_types (derived1, derived2); |
00074dd8 | 624 | |
6de9cd9a DN |
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. */ | |
c6423ef3 | 628 | if (strcmp (derived1->name, derived2->name) == 0 |
b251af97 SK |
629 | && derived1->module != NULL && derived2->module != NULL |
630 | && strcmp (derived1->module, derived2->module) == 0) | |
f3e1097b | 631 | return true; |
6de9cd9a DN |
632 | |
633 | /* Compare type via the rules of the standard. Both types must have | |
f6288c24 FR |
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. */ | |
6de9cd9a | 637 | |
5f88e9b2 FR |
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) | |
f3e1097b | 641 | return false; |
6de9cd9a | 642 | |
e0e85e06 | 643 | if (derived1->component_access == ACCESS_PRIVATE |
b251af97 | 644 | || derived2->component_access == ACCESS_PRIVATE) |
f3e1097b | 645 | return false; |
6de9cd9a | 646 | |
a9e88ec6 | 647 | if (!(derived1->attr.sequence && derived2->attr.sequence) |
5bab4c96 PT |
648 | && !(derived1->attr.is_bind_c && derived2->attr.is_bind_c) |
649 | && !(derived1->attr.pdt_type && derived2->attr.pdt_type)) | |
f3e1097b | 650 | return false; |
6de9cd9a | 651 | |
f6288c24 FR |
652 | /* Protect against null components. */ |
653 | if (derived1->attr.zero_comp != derived2->attr.zero_comp) | |
f3e1097b | 654 | return false; |
f6288c24 FR |
655 | |
656 | if (derived1->attr.zero_comp) | |
f3e1097b | 657 | return true; |
f6288c24 FR |
658 | |
659 | cmp1 = derived1->components; | |
660 | cmp2 = derived2->components; | |
e0e85e06 | 661 | |
6de9cd9a DN |
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 | { | |
f6288c24 | 667 | if (!compare_components (cmp1, cmp2, derived1, derived2)) |
f3e1097b | 668 | return false; |
6de9cd9a | 669 | |
f6288c24 FR |
670 | cmp1 = cmp1->next; |
671 | cmp2 = cmp2->next; | |
2eae3dc7 | 672 | |
f6288c24 | 673 | if (cmp1 == NULL && cmp2 == NULL) |
6de9cd9a | 674 | break; |
f6288c24 | 675 | if (cmp1 == NULL || cmp2 == NULL) |
f3e1097b | 676 | return false; |
6de9cd9a DN |
677 | } |
678 | ||
f3e1097b | 679 | return true; |
6de9cd9a DN |
680 | } |
681 | ||
b251af97 | 682 | |
e0e85e06 PT |
683 | /* Compare two typespecs, recursively if necessary. */ |
684 | ||
f3e1097b | 685 | bool |
b251af97 | 686 | gfc_compare_types (gfc_typespec *ts1, gfc_typespec *ts2) |
e0e85e06 | 687 | { |
a8b3b0b6 CR |
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) | |
f3e1097b | 693 | return true; |
8b704316 | 694 | |
08cc146f TK |
695 | /* Special case for our C interop types. There should be a better |
696 | way of doing this... */ | |
697 | ||
698 | if (((ts1->type == BT_INTEGER && ts2->type == BT_DERIVED) | |
699 | || (ts1->type == BT_DERIVED && ts2->type == BT_INTEGER)) | |
700 | && ts1->u.derived && ts2->u.derived | |
701 | && ts1->u.derived == ts2->u.derived) | |
702 | return true; | |
703 | ||
77b7d71e AV |
704 | /* The _data component is not always present, therefore check for its |
705 | presence before assuming, that its derived->attr is available. | |
706 | When the _data component is not present, then nevertheless the | |
707 | unlimited_polymorphic flag may be set in the derived type's attr. */ | |
708 | if (ts1->type == BT_CLASS && ts1->u.derived->components | |
709 | && ((ts1->u.derived->attr.is_class | |
710 | && ts1->u.derived->components->ts.u.derived->attr | |
711 | .unlimited_polymorphic) | |
712 | || ts1->u.derived->attr.unlimited_polymorphic)) | |
f3e1097b | 713 | return true; |
8b704316 PT |
714 | |
715 | /* F2003: C717 */ | |
716 | if (ts2->type == BT_CLASS && ts1->type == BT_DERIVED | |
77b7d71e AV |
717 | && ts2->u.derived->components |
718 | && ((ts2->u.derived->attr.is_class | |
719 | && ts2->u.derived->components->ts.u.derived->attr | |
720 | .unlimited_polymorphic) | |
721 | || ts2->u.derived->attr.unlimited_polymorphic) | |
8b704316 | 722 | && (ts1->u.derived->attr.sequence || ts1->u.derived->attr.is_bind_c)) |
f3e1097b | 723 | return true; |
8b704316 | 724 | |
cf2b3c22 | 725 | if (ts1->type != ts2->type |
908b8296 FR |
726 | && ((ts1->type != BT_DERIVED && ts1->type != BT_CLASS) |
727 | || (ts2->type != BT_DERIVED && ts2->type != BT_CLASS))) | |
f3e1097b | 728 | return false; |
908b8296 FR |
729 | |
730 | if (ts1->type == BT_UNION) | |
f3e1097b | 731 | return compare_union_types (ts1->u.derived, ts2->u.derived); |
908b8296 | 732 | |
cf2b3c22 | 733 | if (ts1->type != BT_DERIVED && ts1->type != BT_CLASS) |
e0e85e06 PT |
734 | return (ts1->kind == ts2->kind); |
735 | ||
736 | /* Compare derived types. */ | |
f6288c24 | 737 | return gfc_type_compatible (ts1, ts2); |
e0e85e06 PT |
738 | } |
739 | ||
6de9cd9a | 740 | |
f3e1097b | 741 | static bool |
e7333b69 JW |
742 | compare_type (gfc_symbol *s1, gfc_symbol *s2) |
743 | { | |
744 | if (s2->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK)) | |
f3e1097b | 745 | return true; |
e7333b69 | 746 | |
a0fff4c4 JW |
747 | return gfc_compare_types (&s1->ts, &s2->ts) || s2->ts.type == BT_ASSUMED; |
748 | } | |
749 | ||
750 | ||
751 | static bool | |
752 | compare_type_characteristics (gfc_symbol *s1, gfc_symbol *s2) | |
753 | { | |
60de1c7d TB |
754 | /* TYPE and CLASS of the same declared type are type compatible, |
755 | but have different characteristics. */ | |
756 | if ((s1->ts.type == BT_CLASS && s2->ts.type == BT_DERIVED) | |
757 | || (s1->ts.type == BT_DERIVED && s2->ts.type == BT_CLASS)) | |
f3e1097b | 758 | return false; |
60de1c7d | 759 | |
a0fff4c4 | 760 | return compare_type (s1, s2); |
e7333b69 JW |
761 | } |
762 | ||
6de9cd9a | 763 | |
f3e1097b | 764 | static bool |
e7333b69 | 765 | compare_rank (gfc_symbol *s1, gfc_symbol *s2) |
6de9cd9a | 766 | { |
aa6590cf | 767 | gfc_array_spec *as1, *as2; |
6de9cd9a DN |
768 | int r1, r2; |
769 | ||
e7333b69 | 770 | if (s2->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK)) |
f3e1097b | 771 | return true; |
e7ac6a7c | 772 | |
75a3c61a LK |
773 | as1 = (s1->ts.type == BT_CLASS |
774 | && !s1->ts.u.derived->attr.unlimited_polymorphic) | |
775 | ? CLASS_DATA (s1)->as : s1->as; | |
776 | as2 = (s2->ts.type == BT_CLASS | |
777 | && !s2->ts.u.derived->attr.unlimited_polymorphic) | |
778 | ? CLASS_DATA (s2)->as : s2->as; | |
aa6590cf JW |
779 | |
780 | r1 = as1 ? as1->rank : 0; | |
781 | r2 = as2 ? as2->rank : 0; | |
6de9cd9a | 782 | |
e7333b69 | 783 | if (r1 != r2 && (!as2 || as2->type != AS_ASSUMED_RANK)) |
f3e1097b | 784 | return false; /* Ranks differ. */ |
6de9cd9a | 785 | |
f3e1097b | 786 | return true; |
e7333b69 JW |
787 | } |
788 | ||
789 | ||
790 | /* Given two symbols that are formal arguments, compare their ranks | |
f3e1097b JW |
791 | and types. Returns true if they have the same rank and type, |
792 | false otherwise. */ | |
e7333b69 | 793 | |
f3e1097b | 794 | static bool |
e7333b69 JW |
795 | compare_type_rank (gfc_symbol *s1, gfc_symbol *s2) |
796 | { | |
797 | return compare_type (s1, s2) && compare_rank (s1, s2); | |
6de9cd9a DN |
798 | } |
799 | ||
800 | ||
6de9cd9a DN |
801 | /* Given two symbols that are formal arguments, compare their types |
802 | and rank and their formal interfaces if they are both dummy | |
f3e1097b | 803 | procedures. Returns true if the same, false if different. */ |
6de9cd9a | 804 | |
f3e1097b | 805 | static bool |
b251af97 | 806 | compare_type_rank_if (gfc_symbol *s1, gfc_symbol *s2) |
6de9cd9a | 807 | { |
26f2ca2b | 808 | if (s1 == NULL || s2 == NULL) |
f3e1097b | 809 | return (s1 == s2); |
6de9cd9a | 810 | |
489ec4e3 | 811 | if (s1 == s2) |
f3e1097b | 812 | return true; |
489ec4e3 | 813 | |
6de9cd9a DN |
814 | if (s1->attr.flavor != FL_PROCEDURE && s2->attr.flavor != FL_PROCEDURE) |
815 | return compare_type_rank (s1, s2); | |
816 | ||
817 | if (s1->attr.flavor != FL_PROCEDURE || s2->attr.flavor != FL_PROCEDURE) | |
f3e1097b | 818 | return false; |
6de9cd9a | 819 | |
489ec4e3 PT |
820 | /* At this point, both symbols are procedures. It can happen that |
821 | external procedures are compared, where one is identified by usage | |
822 | to be a function or subroutine but the other is not. Check TKR | |
823 | nonetheless for these cases. */ | |
824 | if (s1->attr.function == 0 && s1->attr.subroutine == 0) | |
f3e1097b | 825 | return s1->attr.external ? compare_type_rank (s1, s2) : false; |
489ec4e3 PT |
826 | |
827 | if (s2->attr.function == 0 && s2->attr.subroutine == 0) | |
f3e1097b | 828 | return s2->attr.external ? compare_type_rank (s1, s2) : false; |
6de9cd9a | 829 | |
489ec4e3 | 830 | /* Now the type of procedure has been identified. */ |
6de9cd9a DN |
831 | if (s1->attr.function != s2->attr.function |
832 | || s1->attr.subroutine != s2->attr.subroutine) | |
f3e1097b | 833 | return false; |
6de9cd9a | 834 | |
f3e1097b JW |
835 | if (s1->attr.function && !compare_type_rank (s1, s2)) |
836 | return false; | |
6de9cd9a | 837 | |
993ef28f PT |
838 | /* Originally, gfortran recursed here to check the interfaces of passed |
839 | procedures. This is explicitly not required by the standard. */ | |
f3e1097b | 840 | return true; |
6de9cd9a DN |
841 | } |
842 | ||
843 | ||
844 | /* Given a formal argument list and a keyword name, search the list | |
845 | for that keyword. Returns the correct symbol node if found, NULL | |
846 | if not found. */ | |
847 | ||
848 | static gfc_symbol * | |
b251af97 | 849 | find_keyword_arg (const char *name, gfc_formal_arglist *f) |
6de9cd9a | 850 | { |
6de9cd9a DN |
851 | for (; f; f = f->next) |
852 | if (strcmp (f->sym->name, name) == 0) | |
853 | return f->sym; | |
854 | ||
855 | return NULL; | |
856 | } | |
857 | ||
858 | ||
859 | /******** Interface checking subroutines **********/ | |
860 | ||
861 | ||
862 | /* Given an operator interface and the operator, make sure that all | |
863 | interfaces for that operator are legal. */ | |
864 | ||
94747289 DK |
865 | bool |
866 | gfc_check_operator_interface (gfc_symbol *sym, gfc_intrinsic_op op, | |
867 | locus opwhere) | |
6de9cd9a DN |
868 | { |
869 | gfc_formal_arglist *formal; | |
870 | sym_intent i1, i2; | |
6de9cd9a | 871 | bt t1, t2; |
27189292 | 872 | int args, r1, r2, k1, k2; |
6de9cd9a | 873 | |
94747289 | 874 | gcc_assert (sym); |
6de9cd9a DN |
875 | |
876 | args = 0; | |
877 | t1 = t2 = BT_UNKNOWN; | |
878 | i1 = i2 = INTENT_UNKNOWN; | |
27189292 FXC |
879 | r1 = r2 = -1; |
880 | k1 = k2 = -1; | |
6de9cd9a | 881 | |
4cbc9039 | 882 | for (formal = gfc_sym_get_dummy_args (sym); formal; formal = formal->next) |
6de9cd9a | 883 | { |
94747289 DK |
884 | gfc_symbol *fsym = formal->sym; |
885 | if (fsym == NULL) | |
8c086c9c PT |
886 | { |
887 | gfc_error ("Alternate return cannot appear in operator " | |
94747289 DK |
888 | "interface at %L", &sym->declared_at); |
889 | return false; | |
8c086c9c | 890 | } |
6de9cd9a DN |
891 | if (args == 0) |
892 | { | |
94747289 DK |
893 | t1 = fsym->ts.type; |
894 | i1 = fsym->attr.intent; | |
895 | r1 = (fsym->as != NULL) ? fsym->as->rank : 0; | |
896 | k1 = fsym->ts.kind; | |
6de9cd9a DN |
897 | } |
898 | if (args == 1) | |
899 | { | |
94747289 DK |
900 | t2 = fsym->ts.type; |
901 | i2 = fsym->attr.intent; | |
902 | r2 = (fsym->as != NULL) ? fsym->as->rank : 0; | |
903 | k2 = fsym->ts.kind; | |
6de9cd9a DN |
904 | } |
905 | args++; | |
906 | } | |
907 | ||
27189292 FXC |
908 | /* Only +, - and .not. can be unary operators. |
909 | .not. cannot be a binary operator. */ | |
a1ee985f KG |
910 | if (args == 0 || args > 2 || (args == 1 && op != INTRINSIC_PLUS |
911 | && op != INTRINSIC_MINUS | |
912 | && op != INTRINSIC_NOT) | |
913 | || (args == 2 && op == INTRINSIC_NOT)) | |
27189292 | 914 | { |
efb63364 TB |
915 | if (op == INTRINSIC_ASSIGN) |
916 | gfc_error ("Assignment operator interface at %L must have " | |
917 | "two arguments", &sym->declared_at); | |
918 | else | |
919 | gfc_error ("Operator interface at %L has the wrong number of arguments", | |
920 | &sym->declared_at); | |
94747289 | 921 | return false; |
27189292 FXC |
922 | } |
923 | ||
924 | /* Check that intrinsics are mapped to functions, except | |
925 | INTRINSIC_ASSIGN which should map to a subroutine. */ | |
a1ee985f | 926 | if (op == INTRINSIC_ASSIGN) |
6de9cd9a | 927 | { |
4cbc9039 JW |
928 | gfc_formal_arglist *dummy_args; |
929 | ||
6de9cd9a DN |
930 | if (!sym->attr.subroutine) |
931 | { | |
b251af97 | 932 | gfc_error ("Assignment operator interface at %L must be " |
94747289 DK |
933 | "a SUBROUTINE", &sym->declared_at); |
934 | return false; | |
6de9cd9a | 935 | } |
e19bb186 TB |
936 | |
937 | /* Allowed are (per F2003, 12.3.2.1.2 Defined assignments): | |
94747289 | 938 | - First argument an array with different rank than second, |
315d905f TB |
939 | - First argument is a scalar and second an array, |
940 | - Types and kinds do not conform, or | |
94747289 | 941 | - First argument is of derived type. */ |
4cbc9039 JW |
942 | dummy_args = gfc_sym_get_dummy_args (sym); |
943 | if (dummy_args->sym->ts.type != BT_DERIVED | |
944 | && dummy_args->sym->ts.type != BT_CLASS | |
315d905f | 945 | && (r2 == 0 || r1 == r2) |
4cbc9039 JW |
946 | && (dummy_args->sym->ts.type == dummy_args->next->sym->ts.type |
947 | || (gfc_numeric_ts (&dummy_args->sym->ts) | |
948 | && gfc_numeric_ts (&dummy_args->next->sym->ts)))) | |
8c086c9c | 949 | { |
b251af97 | 950 | gfc_error ("Assignment operator interface at %L must not redefine " |
94747289 DK |
951 | "an INTRINSIC type assignment", &sym->declared_at); |
952 | return false; | |
8c086c9c | 953 | } |
6de9cd9a DN |
954 | } |
955 | else | |
956 | { | |
957 | if (!sym->attr.function) | |
958 | { | |
959 | gfc_error ("Intrinsic operator interface at %L must be a FUNCTION", | |
94747289 DK |
960 | &sym->declared_at); |
961 | return false; | |
6de9cd9a DN |
962 | } |
963 | } | |
964 | ||
27189292 | 965 | /* Check intents on operator interfaces. */ |
a1ee985f | 966 | if (op == INTRINSIC_ASSIGN) |
6de9cd9a | 967 | { |
27189292 | 968 | if (i1 != INTENT_OUT && i1 != INTENT_INOUT) |
94747289 DK |
969 | { |
970 | gfc_error ("First argument of defined assignment at %L must be " | |
971 | "INTENT(OUT) or INTENT(INOUT)", &sym->declared_at); | |
972 | return false; | |
973 | } | |
27189292 FXC |
974 | |
975 | if (i2 != INTENT_IN) | |
94747289 DK |
976 | { |
977 | gfc_error ("Second argument of defined assignment at %L must be " | |
978 | "INTENT(IN)", &sym->declared_at); | |
979 | return false; | |
980 | } | |
27189292 FXC |
981 | } |
982 | else | |
983 | { | |
984 | if (i1 != INTENT_IN) | |
94747289 DK |
985 | { |
986 | gfc_error ("First argument of operator interface at %L must be " | |
987 | "INTENT(IN)", &sym->declared_at); | |
988 | return false; | |
989 | } | |
27189292 FXC |
990 | |
991 | if (args == 2 && i2 != INTENT_IN) | |
94747289 DK |
992 | { |
993 | gfc_error ("Second argument of operator interface at %L must be " | |
994 | "INTENT(IN)", &sym->declared_at); | |
995 | return false; | |
996 | } | |
27189292 FXC |
997 | } |
998 | ||
999 | /* From now on, all we have to do is check that the operator definition | |
1000 | doesn't conflict with an intrinsic operator. The rules for this | |
1001 | game are defined in 7.1.2 and 7.1.3 of both F95 and F2003 standards, | |
1002 | as well as 12.3.2.1.1 of Fortran 2003: | |
1003 | ||
1004 | "If the operator is an intrinsic-operator (R310), the number of | |
1005 | function arguments shall be consistent with the intrinsic uses of | |
1006 | that operator, and the types, kind type parameters, or ranks of the | |
1007 | dummy arguments shall differ from those required for the intrinsic | |
1008 | operation (7.1.2)." */ | |
1009 | ||
1010 | #define IS_NUMERIC_TYPE(t) \ | |
1011 | ((t) == BT_INTEGER || (t) == BT_REAL || (t) == BT_COMPLEX) | |
1012 | ||
1013 | /* Unary ops are easy, do them first. */ | |
a1ee985f | 1014 | if (op == INTRINSIC_NOT) |
27189292 FXC |
1015 | { |
1016 | if (t1 == BT_LOGICAL) | |
6de9cd9a | 1017 | goto bad_repl; |
27189292 | 1018 | else |
94747289 | 1019 | return true; |
27189292 | 1020 | } |
6de9cd9a | 1021 | |
a1ee985f | 1022 | if (args == 1 && (op == INTRINSIC_PLUS || op == INTRINSIC_MINUS)) |
27189292 FXC |
1023 | { |
1024 | if (IS_NUMERIC_TYPE (t1)) | |
6de9cd9a | 1025 | goto bad_repl; |
27189292 | 1026 | else |
94747289 | 1027 | return true; |
27189292 | 1028 | } |
6de9cd9a | 1029 | |
27189292 FXC |
1030 | /* Character intrinsic operators have same character kind, thus |
1031 | operator definitions with operands of different character kinds | |
1032 | are always safe. */ | |
1033 | if (t1 == BT_CHARACTER && t2 == BT_CHARACTER && k1 != k2) | |
94747289 | 1034 | return true; |
6de9cd9a | 1035 | |
27189292 FXC |
1036 | /* Intrinsic operators always perform on arguments of same rank, |
1037 | so different ranks is also always safe. (rank == 0) is an exception | |
1038 | to that, because all intrinsic operators are elemental. */ | |
1039 | if (r1 != r2 && r1 != 0 && r2 != 0) | |
94747289 | 1040 | return true; |
6de9cd9a | 1041 | |
a1ee985f | 1042 | switch (op) |
27189292 | 1043 | { |
6de9cd9a | 1044 | case INTRINSIC_EQ: |
3bed9dd0 | 1045 | case INTRINSIC_EQ_OS: |
6de9cd9a | 1046 | case INTRINSIC_NE: |
3bed9dd0 | 1047 | case INTRINSIC_NE_OS: |
27189292 | 1048 | if (t1 == BT_CHARACTER && t2 == BT_CHARACTER) |
6de9cd9a | 1049 | goto bad_repl; |
27189292 | 1050 | /* Fall through. */ |
6de9cd9a | 1051 | |
27189292 FXC |
1052 | case INTRINSIC_PLUS: |
1053 | case INTRINSIC_MINUS: | |
1054 | case INTRINSIC_TIMES: | |
1055 | case INTRINSIC_DIVIDE: | |
1056 | case INTRINSIC_POWER: | |
1057 | if (IS_NUMERIC_TYPE (t1) && IS_NUMERIC_TYPE (t2)) | |
1058 | goto bad_repl; | |
6de9cd9a DN |
1059 | break; |
1060 | ||
6de9cd9a | 1061 | case INTRINSIC_GT: |
3bed9dd0 | 1062 | case INTRINSIC_GT_OS: |
27189292 | 1063 | case INTRINSIC_GE: |
3bed9dd0 | 1064 | case INTRINSIC_GE_OS: |
27189292 | 1065 | case INTRINSIC_LT: |
3bed9dd0 | 1066 | case INTRINSIC_LT_OS: |
27189292 | 1067 | case INTRINSIC_LE: |
3bed9dd0 | 1068 | case INTRINSIC_LE_OS: |
27189292 FXC |
1069 | if (t1 == BT_CHARACTER && t2 == BT_CHARACTER) |
1070 | goto bad_repl; | |
6de9cd9a DN |
1071 | if ((t1 == BT_INTEGER || t1 == BT_REAL) |
1072 | && (t2 == BT_INTEGER || t2 == BT_REAL)) | |
1073 | goto bad_repl; | |
27189292 | 1074 | break; |
6de9cd9a | 1075 | |
27189292 FXC |
1076 | case INTRINSIC_CONCAT: |
1077 | if (t1 == BT_CHARACTER && t2 == BT_CHARACTER) | |
1078 | goto bad_repl; | |
6de9cd9a DN |
1079 | break; |
1080 | ||
6de9cd9a | 1081 | case INTRINSIC_AND: |
27189292 | 1082 | case INTRINSIC_OR: |
6de9cd9a DN |
1083 | case INTRINSIC_EQV: |
1084 | case INTRINSIC_NEQV: | |
6de9cd9a DN |
1085 | if (t1 == BT_LOGICAL && t2 == BT_LOGICAL) |
1086 | goto bad_repl; | |
1087 | break; | |
1088 | ||
6de9cd9a | 1089 | default: |
27189292 FXC |
1090 | break; |
1091 | } | |
6de9cd9a | 1092 | |
94747289 | 1093 | return true; |
6de9cd9a | 1094 | |
27189292 FXC |
1095 | #undef IS_NUMERIC_TYPE |
1096 | ||
6de9cd9a DN |
1097 | bad_repl: |
1098 | gfc_error ("Operator interface at %L conflicts with intrinsic interface", | |
94747289 DK |
1099 | &opwhere); |
1100 | return false; | |
6de9cd9a DN |
1101 | } |
1102 | ||
1103 | ||
1104 | /* Given a pair of formal argument lists, we see if the two lists can | |
1105 | be distinguished by counting the number of nonoptional arguments of | |
1106 | a given type/rank in f1 and seeing if there are less then that | |
1107 | number of those arguments in f2 (including optional arguments). | |
1108 | Since this test is asymmetric, it has to be called twice to make it | |
6f3ab30d JW |
1109 | symmetric. Returns nonzero if the argument lists are incompatible |
1110 | by this test. This subroutine implements rule 1 of section F03:16.2.3. | |
1111 | 'p1' and 'p2' are the PASS arguments of both procedures (if applicable). */ | |
6de9cd9a | 1112 | |
f3e1097b | 1113 | static bool |
6f3ab30d JW |
1114 | count_types_test (gfc_formal_arglist *f1, gfc_formal_arglist *f2, |
1115 | const char *p1, const char *p2) | |
6de9cd9a | 1116 | { |
f3e1097b | 1117 | int ac1, ac2, i, j, k, n1; |
6de9cd9a DN |
1118 | gfc_formal_arglist *f; |
1119 | ||
1120 | typedef struct | |
1121 | { | |
1122 | int flag; | |
1123 | gfc_symbol *sym; | |
1124 | } | |
1125 | arginfo; | |
1126 | ||
1127 | arginfo *arg; | |
1128 | ||
1129 | n1 = 0; | |
1130 | ||
1131 | for (f = f1; f; f = f->next) | |
1132 | n1++; | |
1133 | ||
1134 | /* Build an array of integers that gives the same integer to | |
1135 | arguments of the same type/rank. */ | |
ece3f663 | 1136 | arg = XCNEWVEC (arginfo, n1); |
6de9cd9a DN |
1137 | |
1138 | f = f1; | |
1139 | for (i = 0; i < n1; i++, f = f->next) | |
1140 | { | |
1141 | arg[i].flag = -1; | |
1142 | arg[i].sym = f->sym; | |
1143 | } | |
1144 | ||
1145 | k = 0; | |
1146 | ||
1147 | for (i = 0; i < n1; i++) | |
1148 | { | |
1149 | if (arg[i].flag != -1) | |
1150 | continue; | |
1151 | ||
6f3ab30d JW |
1152 | if (arg[i].sym && (arg[i].sym->attr.optional |
1153 | || (p1 && strcmp (arg[i].sym->name, p1) == 0))) | |
1154 | continue; /* Skip OPTIONAL and PASS arguments. */ | |
6de9cd9a DN |
1155 | |
1156 | arg[i].flag = k; | |
1157 | ||
6f3ab30d | 1158 | /* Find other non-optional, non-pass arguments of the same type/rank. */ |
6de9cd9a | 1159 | for (j = i + 1; j < n1; j++) |
6f3ab30d JW |
1160 | if ((arg[j].sym == NULL |
1161 | || !(arg[j].sym->attr.optional | |
1162 | || (p1 && strcmp (arg[j].sym->name, p1) == 0))) | |
2b603773 JW |
1163 | && (compare_type_rank_if (arg[i].sym, arg[j].sym) |
1164 | || compare_type_rank_if (arg[j].sym, arg[i].sym))) | |
6de9cd9a DN |
1165 | arg[j].flag = k; |
1166 | ||
1167 | k++; | |
1168 | } | |
1169 | ||
1170 | /* Now loop over each distinct type found in f1. */ | |
1171 | k = 0; | |
f3e1097b | 1172 | bool rc = false; |
6de9cd9a DN |
1173 | |
1174 | for (i = 0; i < n1; i++) | |
1175 | { | |
1176 | if (arg[i].flag != k) | |
1177 | continue; | |
1178 | ||
1179 | ac1 = 1; | |
1180 | for (j = i + 1; j < n1; j++) | |
1181 | if (arg[j].flag == k) | |
1182 | ac1++; | |
1183 | ||
6f3ab30d JW |
1184 | /* Count the number of non-pass arguments in f2 with that type, |
1185 | including those that are optional. */ | |
6de9cd9a DN |
1186 | ac2 = 0; |
1187 | ||
1188 | for (f = f2; f; f = f->next) | |
6f3ab30d JW |
1189 | if ((!p2 || strcmp (f->sym->name, p2) != 0) |
1190 | && (compare_type_rank_if (arg[i].sym, f->sym) | |
1191 | || compare_type_rank_if (f->sym, arg[i].sym))) | |
6de9cd9a DN |
1192 | ac2++; |
1193 | ||
1194 | if (ac1 > ac2) | |
1195 | { | |
f3e1097b | 1196 | rc = true; |
6de9cd9a DN |
1197 | break; |
1198 | } | |
1199 | ||
1200 | k++; | |
1201 | } | |
1202 | ||
cede9502 | 1203 | free (arg); |
6de9cd9a DN |
1204 | |
1205 | return rc; | |
1206 | } | |
1207 | ||
1208 | ||
e9355cc3 JW |
1209 | /* Perform the correspondence test in rule (3) of F08:C1215. |
1210 | Returns zero if no argument is found that satisfies this rule, | |
1211 | nonzero otherwise. 'p1' and 'p2' are the PASS arguments of both procedures | |
6f3ab30d | 1212 | (if applicable). |
6de9cd9a DN |
1213 | |
1214 | This test is also not symmetric in f1 and f2 and must be called | |
1215 | twice. This test finds problems caused by sorting the actual | |
1216 | argument list with keywords. For example: | |
1217 | ||
1218 | INTERFACE FOO | |
e9355cc3 JW |
1219 | SUBROUTINE F1(A, B) |
1220 | INTEGER :: A ; REAL :: B | |
1221 | END SUBROUTINE F1 | |
6de9cd9a | 1222 | |
e9355cc3 JW |
1223 | SUBROUTINE F2(B, A) |
1224 | INTEGER :: A ; REAL :: B | |
1225 | END SUBROUTINE F1 | |
6de9cd9a DN |
1226 | END INTERFACE FOO |
1227 | ||
1228 | At this point, 'CALL FOO(A=1, B=1.0)' is ambiguous. */ | |
1229 | ||
f3e1097b | 1230 | static bool |
6f3ab30d JW |
1231 | generic_correspondence (gfc_formal_arglist *f1, gfc_formal_arglist *f2, |
1232 | const char *p1, const char *p2) | |
6de9cd9a | 1233 | { |
6de9cd9a DN |
1234 | gfc_formal_arglist *f2_save, *g; |
1235 | gfc_symbol *sym; | |
1236 | ||
1237 | f2_save = f2; | |
1238 | ||
1239 | while (f1) | |
1240 | { | |
1241 | if (f1->sym->attr.optional) | |
1242 | goto next; | |
1243 | ||
6f3ab30d JW |
1244 | if (p1 && strcmp (f1->sym->name, p1) == 0) |
1245 | f1 = f1->next; | |
1246 | if (f2 && p2 && strcmp (f2->sym->name, p2) == 0) | |
1247 | f2 = f2->next; | |
1248 | ||
2b603773 | 1249 | if (f2 != NULL && (compare_type_rank (f1->sym, f2->sym) |
e9355cc3 JW |
1250 | || compare_type_rank (f2->sym, f1->sym)) |
1251 | && !((gfc_option.allow_std & GFC_STD_F2008) | |
1252 | && ((f1->sym->attr.allocatable && f2->sym->attr.pointer) | |
1253 | || (f2->sym->attr.allocatable && f1->sym->attr.pointer)))) | |
6de9cd9a DN |
1254 | goto next; |
1255 | ||
1256 | /* Now search for a disambiguating keyword argument starting at | |
b251af97 | 1257 | the current non-match. */ |
6de9cd9a DN |
1258 | for (g = f1; g; g = g->next) |
1259 | { | |
6f3ab30d | 1260 | if (g->sym->attr.optional || (p1 && strcmp (g->sym->name, p1) == 0)) |
6de9cd9a DN |
1261 | continue; |
1262 | ||
1263 | sym = find_keyword_arg (g->sym->name, f2_save); | |
e9355cc3 JW |
1264 | if (sym == NULL || !compare_type_rank (g->sym, sym) |
1265 | || ((gfc_option.allow_std & GFC_STD_F2008) | |
1266 | && ((sym->attr.allocatable && g->sym->attr.pointer) | |
1267 | || (sym->attr.pointer && g->sym->attr.allocatable)))) | |
f3e1097b | 1268 | return true; |
6de9cd9a DN |
1269 | } |
1270 | ||
1271 | next: | |
6f3ab30d JW |
1272 | if (f1 != NULL) |
1273 | f1 = f1->next; | |
6de9cd9a DN |
1274 | if (f2 != NULL) |
1275 | f2 = f2->next; | |
1276 | } | |
1277 | ||
f3e1097b | 1278 | return false; |
6de9cd9a DN |
1279 | } |
1280 | ||
1281 | ||
e7333b69 JW |
1282 | static int |
1283 | symbol_rank (gfc_symbol *sym) | |
1284 | { | |
1fb84d5b SK |
1285 | gfc_array_spec *as = NULL; |
1286 | ||
f11600c9 | 1287 | if (sym->ts.type == BT_CLASS && CLASS_DATA (sym)) |
1fb84d5b SK |
1288 | as = CLASS_DATA (sym)->as; |
1289 | else | |
1290 | as = sym->as; | |
1291 | ||
e7333b69 JW |
1292 | return as ? as->rank : 0; |
1293 | } | |
1294 | ||
1295 | ||
9795c594 JW |
1296 | /* Check if the characteristics of two dummy arguments match, |
1297 | cf. F08:12.3.2. */ | |
1298 | ||
4668d6f9 PT |
1299 | bool |
1300 | gfc_check_dummy_characteristics (gfc_symbol *s1, gfc_symbol *s2, | |
1301 | bool type_must_agree, char *errmsg, | |
1302 | int err_len) | |
9795c594 | 1303 | { |
9362a03b | 1304 | if (s1 == NULL || s2 == NULL) |
524af0d6 | 1305 | return s1 == s2 ? true : false; |
9362a03b | 1306 | |
9795c594 | 1307 | /* Check type and rank. */ |
e7333b69 | 1308 | if (type_must_agree) |
9795c594 | 1309 | { |
a0fff4c4 JW |
1310 | if (!compare_type_characteristics (s1, s2) |
1311 | || !compare_type_characteristics (s2, s1)) | |
e7333b69 JW |
1312 | { |
1313 | snprintf (errmsg, err_len, "Type mismatch in argument '%s' (%s/%s)", | |
1314 | s1->name, gfc_typename (&s1->ts), gfc_typename (&s2->ts)); | |
1315 | return false; | |
1316 | } | |
1317 | if (!compare_rank (s1, s2)) | |
1318 | { | |
1319 | snprintf (errmsg, err_len, "Rank mismatch in argument '%s' (%i/%i)", | |
1320 | s1->name, symbol_rank (s1), symbol_rank (s2)); | |
1321 | return false; | |
1322 | } | |
9795c594 JW |
1323 | } |
1324 | ||
1325 | /* Check INTENT. */ | |
1326 | if (s1->attr.intent != s2->attr.intent) | |
1327 | { | |
1328 | snprintf (errmsg, err_len, "INTENT mismatch in argument '%s'", | |
1329 | s1->name); | |
524af0d6 | 1330 | return false; |
9795c594 JW |
1331 | } |
1332 | ||
1333 | /* Check OPTIONAL attribute. */ | |
1334 | if (s1->attr.optional != s2->attr.optional) | |
1335 | { | |
1336 | snprintf (errmsg, err_len, "OPTIONAL mismatch in argument '%s'", | |
1337 | s1->name); | |
524af0d6 | 1338 | return false; |
9795c594 JW |
1339 | } |
1340 | ||
1341 | /* Check ALLOCATABLE attribute. */ | |
1342 | if (s1->attr.allocatable != s2->attr.allocatable) | |
1343 | { | |
1344 | snprintf (errmsg, err_len, "ALLOCATABLE mismatch in argument '%s'", | |
1345 | s1->name); | |
524af0d6 | 1346 | return false; |
9795c594 JW |
1347 | } |
1348 | ||
1349 | /* Check POINTER attribute. */ | |
1350 | if (s1->attr.pointer != s2->attr.pointer) | |
1351 | { | |
1352 | snprintf (errmsg, err_len, "POINTER mismatch in argument '%s'", | |
1353 | s1->name); | |
524af0d6 | 1354 | return false; |
9795c594 JW |
1355 | } |
1356 | ||
1357 | /* Check TARGET attribute. */ | |
1358 | if (s1->attr.target != s2->attr.target) | |
1359 | { | |
1360 | snprintf (errmsg, err_len, "TARGET mismatch in argument '%s'", | |
1361 | s1->name); | |
524af0d6 | 1362 | return false; |
9795c594 JW |
1363 | } |
1364 | ||
688974a3 JW |
1365 | /* Check ASYNCHRONOUS attribute. */ |
1366 | if (s1->attr.asynchronous != s2->attr.asynchronous) | |
1367 | { | |
1368 | snprintf (errmsg, err_len, "ASYNCHRONOUS mismatch in argument '%s'", | |
1369 | s1->name); | |
1370 | return false; | |
1371 | } | |
1372 | ||
1373 | /* Check CONTIGUOUS attribute. */ | |
1374 | if (s1->attr.contiguous != s2->attr.contiguous) | |
1375 | { | |
1376 | snprintf (errmsg, err_len, "CONTIGUOUS mismatch in argument '%s'", | |
1377 | s1->name); | |
1378 | return false; | |
1379 | } | |
1380 | ||
1381 | /* Check VALUE attribute. */ | |
1382 | if (s1->attr.value != s2->attr.value) | |
1383 | { | |
1384 | snprintf (errmsg, err_len, "VALUE mismatch in argument '%s'", | |
1385 | s1->name); | |
1386 | return false; | |
1387 | } | |
1388 | ||
1389 | /* Check VOLATILE attribute. */ | |
1390 | if (s1->attr.volatile_ != s2->attr.volatile_) | |
1391 | { | |
1392 | snprintf (errmsg, err_len, "VOLATILE mismatch in argument '%s'", | |
1393 | s1->name); | |
1394 | return false; | |
1395 | } | |
9795c594 | 1396 | |
f2f8171f JW |
1397 | /* Check interface of dummy procedures. */ |
1398 | if (s1->attr.flavor == FL_PROCEDURE) | |
1399 | { | |
1400 | char err[200]; | |
1401 | if (!gfc_compare_interfaces (s1, s2, s2->name, 0, 1, err, sizeof(err), | |
1402 | NULL, NULL)) | |
1403 | { | |
1404 | snprintf (errmsg, err_len, "Interface mismatch in dummy procedure " | |
1405 | "'%s': %s", s1->name, err); | |
524af0d6 | 1406 | return false; |
f2f8171f JW |
1407 | } |
1408 | } | |
1409 | ||
9795c594 JW |
1410 | /* Check string length. */ |
1411 | if (s1->ts.type == BT_CHARACTER | |
1412 | && s1->ts.u.cl && s1->ts.u.cl->length | |
1413 | && s2->ts.u.cl && s2->ts.u.cl->length) | |
1414 | { | |
1415 | int compval = gfc_dep_compare_expr (s1->ts.u.cl->length, | |
1416 | s2->ts.u.cl->length); | |
1417 | switch (compval) | |
1418 | { | |
1419 | case -1: | |
1420 | case 1: | |
1421 | case -3: | |
1422 | snprintf (errmsg, err_len, "Character length mismatch " | |
1423 | "in argument '%s'", s1->name); | |
524af0d6 | 1424 | return false; |
9795c594 JW |
1425 | |
1426 | case -2: | |
1427 | /* FIXME: Implement a warning for this case. | |
db30e21c | 1428 | gfc_warning (0, "Possible character length mismatch in argument %qs", |
9795c594 JW |
1429 | s1->name);*/ |
1430 | break; | |
1431 | ||
1432 | case 0: | |
1433 | break; | |
1434 | ||
1435 | default: | |
1436 | gfc_internal_error ("check_dummy_characteristics: Unexpected result " | |
1437 | "%i of gfc_dep_compare_expr", compval); | |
1438 | break; | |
1439 | } | |
1440 | } | |
1441 | ||
1442 | /* Check array shape. */ | |
1443 | if (s1->as && s2->as) | |
1444 | { | |
97f26732 JW |
1445 | int i, compval; |
1446 | gfc_expr *shape1, *shape2; | |
1447 | ||
9795c594 JW |
1448 | if (s1->as->type != s2->as->type) |
1449 | { | |
1450 | snprintf (errmsg, err_len, "Shape mismatch in argument '%s'", | |
1451 | s1->name); | |
524af0d6 | 1452 | return false; |
9795c594 | 1453 | } |
97f26732 | 1454 | |
b25affbd TB |
1455 | if (s1->as->corank != s2->as->corank) |
1456 | { | |
1457 | snprintf (errmsg, err_len, "Corank mismatch in argument '%s' (%i/%i)", | |
1458 | s1->name, s1->as->corank, s2->as->corank); | |
1459 | return false; | |
1460 | } | |
1461 | ||
97f26732 | 1462 | if (s1->as->type == AS_EXPLICIT) |
47da0bf6 | 1463 | for (i = 0; i < s1->as->rank + MAX (0, s1->as->corank-1); i++) |
97f26732 JW |
1464 | { |
1465 | shape1 = gfc_subtract (gfc_copy_expr (s1->as->upper[i]), | |
1466 | gfc_copy_expr (s1->as->lower[i])); | |
1467 | shape2 = gfc_subtract (gfc_copy_expr (s2->as->upper[i]), | |
1468 | gfc_copy_expr (s2->as->lower[i])); | |
1469 | compval = gfc_dep_compare_expr (shape1, shape2); | |
1470 | gfc_free_expr (shape1); | |
1471 | gfc_free_expr (shape2); | |
1472 | switch (compval) | |
1473 | { | |
1474 | case -1: | |
1475 | case 1: | |
1476 | case -3: | |
b25affbd TB |
1477 | if (i < s1->as->rank) |
1478 | snprintf (errmsg, err_len, "Shape mismatch in dimension %i of" | |
1479 | " argument '%s'", i + 1, s1->name); | |
1480 | else | |
1481 | snprintf (errmsg, err_len, "Shape mismatch in codimension %i " | |
1482 | "of argument '%s'", i - s1->as->rank + 1, s1->name); | |
524af0d6 | 1483 | return false; |
97f26732 JW |
1484 | |
1485 | case -2: | |
1486 | /* FIXME: Implement a warning for this case. | |
db30e21c | 1487 | gfc_warning (0, "Possible shape mismatch in argument %qs", |
97f26732 JW |
1488 | s1->name);*/ |
1489 | break; | |
1490 | ||
1491 | case 0: | |
1492 | break; | |
1493 | ||
1494 | default: | |
1495 | gfc_internal_error ("check_dummy_characteristics: Unexpected " | |
1496 | "result %i of gfc_dep_compare_expr", | |
1497 | compval); | |
1498 | break; | |
1499 | } | |
1500 | } | |
9795c594 | 1501 | } |
8b704316 | 1502 | |
524af0d6 | 1503 | return true; |
9795c594 JW |
1504 | } |
1505 | ||
1506 | ||
edc802c7 JW |
1507 | /* Check if the characteristics of two function results match, |
1508 | cf. F08:12.3.3. */ | |
1509 | ||
4668d6f9 PT |
1510 | bool |
1511 | gfc_check_result_characteristics (gfc_symbol *s1, gfc_symbol *s2, | |
edc802c7 JW |
1512 | char *errmsg, int err_len) |
1513 | { | |
1514 | gfc_symbol *r1, *r2; | |
1515 | ||
82b541a1 JW |
1516 | if (s1->ts.interface && s1->ts.interface->result) |
1517 | r1 = s1->ts.interface->result; | |
1518 | else | |
1519 | r1 = s1->result ? s1->result : s1; | |
1520 | ||
1521 | if (s2->ts.interface && s2->ts.interface->result) | |
1522 | r2 = s2->ts.interface->result; | |
1523 | else | |
1524 | r2 = s2->result ? s2->result : s2; | |
edc802c7 JW |
1525 | |
1526 | if (r1->ts.type == BT_UNKNOWN) | |
524af0d6 | 1527 | return true; |
edc802c7 JW |
1528 | |
1529 | /* Check type and rank. */ | |
a0fff4c4 | 1530 | if (!compare_type_characteristics (r1, r2)) |
edc802c7 | 1531 | { |
e7333b69 JW |
1532 | snprintf (errmsg, err_len, "Type mismatch in function result (%s/%s)", |
1533 | gfc_typename (&r1->ts), gfc_typename (&r2->ts)); | |
1534 | return false; | |
1535 | } | |
1536 | if (!compare_rank (r1, r2)) | |
1537 | { | |
1538 | snprintf (errmsg, err_len, "Rank mismatch in function result (%i/%i)", | |
1539 | symbol_rank (r1), symbol_rank (r2)); | |
524af0d6 | 1540 | return false; |
edc802c7 JW |
1541 | } |
1542 | ||
1543 | /* Check ALLOCATABLE attribute. */ | |
1544 | if (r1->attr.allocatable != r2->attr.allocatable) | |
1545 | { | |
1546 | snprintf (errmsg, err_len, "ALLOCATABLE attribute mismatch in " | |
1547 | "function result"); | |
524af0d6 | 1548 | return false; |
edc802c7 JW |
1549 | } |
1550 | ||
1551 | /* Check POINTER attribute. */ | |
1552 | if (r1->attr.pointer != r2->attr.pointer) | |
1553 | { | |
1554 | snprintf (errmsg, err_len, "POINTER attribute mismatch in " | |
1555 | "function result"); | |
524af0d6 | 1556 | return false; |
edc802c7 JW |
1557 | } |
1558 | ||
1559 | /* Check CONTIGUOUS attribute. */ | |
1560 | if (r1->attr.contiguous != r2->attr.contiguous) | |
1561 | { | |
1562 | snprintf (errmsg, err_len, "CONTIGUOUS attribute mismatch in " | |
1563 | "function result"); | |
524af0d6 | 1564 | return false; |
edc802c7 JW |
1565 | } |
1566 | ||
1567 | /* Check PROCEDURE POINTER attribute. */ | |
1568 | if (r1 != s1 && r1->attr.proc_pointer != r2->attr.proc_pointer) | |
1569 | { | |
1570 | snprintf (errmsg, err_len, "PROCEDURE POINTER mismatch in " | |
1571 | "function result"); | |
524af0d6 | 1572 | return false; |
edc802c7 JW |
1573 | } |
1574 | ||
1575 | /* Check string length. */ | |
1576 | if (r1->ts.type == BT_CHARACTER && r1->ts.u.cl && r2->ts.u.cl) | |
1577 | { | |
1578 | if (r1->ts.deferred != r2->ts.deferred) | |
1579 | { | |
1580 | snprintf (errmsg, err_len, "Character length mismatch " | |
1581 | "in function result"); | |
524af0d6 | 1582 | return false; |
edc802c7 JW |
1583 | } |
1584 | ||
96486998 | 1585 | if (r1->ts.u.cl->length && r2->ts.u.cl->length) |
edc802c7 JW |
1586 | { |
1587 | int compval = gfc_dep_compare_expr (r1->ts.u.cl->length, | |
1588 | r2->ts.u.cl->length); | |
1589 | switch (compval) | |
1590 | { | |
1591 | case -1: | |
1592 | case 1: | |
1593 | case -3: | |
1594 | snprintf (errmsg, err_len, "Character length mismatch " | |
1595 | "in function result"); | |
524af0d6 | 1596 | return false; |
edc802c7 JW |
1597 | |
1598 | case -2: | |
1599 | /* FIXME: Implement a warning for this case. | |
1600 | snprintf (errmsg, err_len, "Possible character length mismatch " | |
1601 | "in function result");*/ | |
1602 | break; | |
1603 | ||
1604 | case 0: | |
1605 | break; | |
1606 | ||
1607 | default: | |
1608 | gfc_internal_error ("check_result_characteristics (1): Unexpected " | |
1609 | "result %i of gfc_dep_compare_expr", compval); | |
1610 | break; | |
1611 | } | |
1612 | } | |
1613 | } | |
1614 | ||
1615 | /* Check array shape. */ | |
1616 | if (!r1->attr.allocatable && !r1->attr.pointer && r1->as && r2->as) | |
1617 | { | |
1618 | int i, compval; | |
1619 | gfc_expr *shape1, *shape2; | |
1620 | ||
1621 | if (r1->as->type != r2->as->type) | |
1622 | { | |
1623 | snprintf (errmsg, err_len, "Shape mismatch in function result"); | |
524af0d6 | 1624 | return false; |
edc802c7 JW |
1625 | } |
1626 | ||
1627 | if (r1->as->type == AS_EXPLICIT) | |
1628 | for (i = 0; i < r1->as->rank + r1->as->corank; i++) | |
1629 | { | |
1630 | shape1 = gfc_subtract (gfc_copy_expr (r1->as->upper[i]), | |
1631 | gfc_copy_expr (r1->as->lower[i])); | |
1632 | shape2 = gfc_subtract (gfc_copy_expr (r2->as->upper[i]), | |
1633 | gfc_copy_expr (r2->as->lower[i])); | |
1634 | compval = gfc_dep_compare_expr (shape1, shape2); | |
1635 | gfc_free_expr (shape1); | |
1636 | gfc_free_expr (shape2); | |
1637 | switch (compval) | |
1638 | { | |
1639 | case -1: | |
1640 | case 1: | |
1641 | case -3: | |
1642 | snprintf (errmsg, err_len, "Shape mismatch in dimension %i of " | |
1643 | "function result", i + 1); | |
524af0d6 | 1644 | return false; |
edc802c7 JW |
1645 | |
1646 | case -2: | |
1647 | /* FIXME: Implement a warning for this case. | |
db30e21c | 1648 | gfc_warning (0, "Possible shape mismatch in return value");*/ |
edc802c7 JW |
1649 | break; |
1650 | ||
1651 | case 0: | |
1652 | break; | |
1653 | ||
1654 | default: | |
1655 | gfc_internal_error ("check_result_characteristics (2): " | |
1656 | "Unexpected result %i of " | |
1657 | "gfc_dep_compare_expr", compval); | |
1658 | break; | |
1659 | } | |
1660 | } | |
1661 | } | |
1662 | ||
524af0d6 | 1663 | return true; |
edc802c7 JW |
1664 | } |
1665 | ||
1666 | ||
6de9cd9a | 1667 | /* 'Compare' two formal interfaces associated with a pair of symbols. |
f3e1097b | 1668 | We return true if there exists an actual argument list that |
8ad15a0a | 1669 | would be ambiguous between the two interfaces, zero otherwise. |
58c1ae36 | 1670 | 'strict_flag' specifies whether all the characteristics are |
6f3ab30d JW |
1671 | required to match, which is not the case for ambiguity checks. |
1672 | 'p1' and 'p2' are the PASS arguments of both procedures (if applicable). */ | |
6de9cd9a | 1673 | |
f3e1097b | 1674 | bool |
889dc035 | 1675 | gfc_compare_interfaces (gfc_symbol *s1, gfc_symbol *s2, const char *name2, |
58c1ae36 | 1676 | int generic_flag, int strict_flag, |
6f3ab30d JW |
1677 | char *errmsg, int err_len, |
1678 | const char *p1, const char *p2) | |
6de9cd9a DN |
1679 | { |
1680 | gfc_formal_arglist *f1, *f2; | |
1681 | ||
0175478d JD |
1682 | gcc_assert (name2 != NULL); |
1683 | ||
9b63f282 JW |
1684 | if (s1->attr.function && (s2->attr.subroutine |
1685 | || (!s2->attr.function && s2->ts.type == BT_UNKNOWN | |
889dc035 | 1686 | && gfc_get_default_type (name2, s2->ns)->type == BT_UNKNOWN))) |
8ad15a0a JW |
1687 | { |
1688 | if (errmsg != NULL) | |
889dc035 | 1689 | snprintf (errmsg, err_len, "'%s' is not a function", name2); |
f3e1097b | 1690 | return false; |
8ad15a0a JW |
1691 | } |
1692 | ||
1693 | if (s1->attr.subroutine && s2->attr.function) | |
1694 | { | |
1695 | if (errmsg != NULL) | |
889dc035 | 1696 | snprintf (errmsg, err_len, "'%s' is not a subroutine", name2); |
f3e1097b | 1697 | return false; |
8ad15a0a | 1698 | } |
3afadac3 | 1699 | |
58c1ae36 JW |
1700 | /* Do strict checks on all characteristics |
1701 | (for dummy procedures and procedure pointer assignments). */ | |
1702 | if (!generic_flag && strict_flag) | |
6cc309c9 | 1703 | { |
58c1ae36 | 1704 | if (s1->attr.function && s2->attr.function) |
8ad15a0a | 1705 | { |
edc802c7 | 1706 | /* If both are functions, check result characteristics. */ |
4668d6f9 PT |
1707 | if (!gfc_check_result_characteristics (s1, s2, errmsg, err_len) |
1708 | || !gfc_check_result_characteristics (s2, s1, errmsg, err_len)) | |
f3e1097b | 1709 | return false; |
58c1ae36 JW |
1710 | } |
1711 | ||
1712 | if (s1->attr.pure && !s2->attr.pure) | |
1713 | { | |
1714 | snprintf (errmsg, err_len, "Mismatch in PURE attribute"); | |
f3e1097b | 1715 | return false; |
58c1ae36 JW |
1716 | } |
1717 | if (s1->attr.elemental && !s2->attr.elemental) | |
1718 | { | |
1719 | snprintf (errmsg, err_len, "Mismatch in ELEMENTAL attribute"); | |
f3e1097b | 1720 | return false; |
8ad15a0a | 1721 | } |
6cc309c9 | 1722 | } |
26033479 | 1723 | |
8ad15a0a JW |
1724 | if (s1->attr.if_source == IFSRC_UNKNOWN |
1725 | || s2->attr.if_source == IFSRC_UNKNOWN) | |
f3e1097b | 1726 | return true; |
26033479 | 1727 | |
4cbc9039 JW |
1728 | f1 = gfc_sym_get_dummy_args (s1); |
1729 | f2 = gfc_sym_get_dummy_args (s2); | |
26033479 | 1730 | |
bd845c14 | 1731 | /* Special case: No arguments. */ |
c73b6478 | 1732 | if (f1 == NULL && f2 == NULL) |
f3e1097b | 1733 | return true; |
6cc309c9 | 1734 | |
c73b6478 | 1735 | if (generic_flag) |
6cc309c9 | 1736 | { |
6f3ab30d JW |
1737 | if (count_types_test (f1, f2, p1, p2) |
1738 | || count_types_test (f2, f1, p2, p1)) | |
f3e1097b | 1739 | return false; |
bd845c14 SK |
1740 | |
1741 | /* Special case: alternate returns. If both f1->sym and f2->sym are | |
e4e659b9 JW |
1742 | NULL, then the leading formal arguments are alternate returns. |
1743 | The previous conditional should catch argument lists with | |
bd845c14 SK |
1744 | different number of argument. */ |
1745 | if (f1 && f1->sym == NULL && f2 && f2->sym == NULL) | |
f3e1097b | 1746 | return true; |
bd845c14 | 1747 | |
6f3ab30d JW |
1748 | if (generic_correspondence (f1, f2, p1, p2) |
1749 | || generic_correspondence (f2, f1, p2, p1)) | |
f3e1097b | 1750 | return false; |
6cc309c9 | 1751 | } |
c73b6478 | 1752 | else |
8ad15a0a JW |
1753 | /* Perform the abbreviated correspondence test for operators (the |
1754 | arguments cannot be optional and are always ordered correctly). | |
1755 | This is also done when comparing interfaces for dummy procedures and in | |
1756 | procedure pointer assignments. */ | |
1757 | ||
f76c4d97 | 1758 | for (; f1 || f2; f1 = f1->next, f2 = f2->next) |
8ad15a0a JW |
1759 | { |
1760 | /* Check existence. */ | |
8ad15a0a JW |
1761 | if (f1 == NULL || f2 == NULL) |
1762 | { | |
1763 | if (errmsg != NULL) | |
1764 | snprintf (errmsg, err_len, "'%s' has the wrong number of " | |
889dc035 | 1765 | "arguments", name2); |
f3e1097b | 1766 | return false; |
8ad15a0a JW |
1767 | } |
1768 | ||
58c1ae36 | 1769 | if (strict_flag) |
8ad15a0a | 1770 | { |
9795c594 | 1771 | /* Check all characteristics. */ |
4668d6f9 | 1772 | if (!gfc_check_dummy_characteristics (f1->sym, f2->sym, true, |
524af0d6 | 1773 | errmsg, err_len)) |
f3e1097b | 1774 | return false; |
9795c594 | 1775 | } |
e7333b69 | 1776 | else |
9795c594 JW |
1777 | { |
1778 | /* Only check type and rank. */ | |
e7333b69 JW |
1779 | if (!compare_type (f2->sym, f1->sym)) |
1780 | { | |
1781 | if (errmsg != NULL) | |
1782 | snprintf (errmsg, err_len, "Type mismatch in argument '%s' " | |
1783 | "(%s/%s)", f1->sym->name, | |
1784 | gfc_typename (&f1->sym->ts), | |
1785 | gfc_typename (&f2->sym->ts)); | |
f3e1097b | 1786 | return false; |
e7333b69 JW |
1787 | } |
1788 | if (!compare_rank (f2->sym, f1->sym)) | |
1789 | { | |
1790 | if (errmsg != NULL) | |
1791 | snprintf (errmsg, err_len, "Rank mismatch in argument '%s' " | |
1792 | "(%i/%i)", f1->sym->name, symbol_rank (f1->sym), | |
1793 | symbol_rank (f2->sym)); | |
f3e1097b | 1794 | return false; |
e7333b69 | 1795 | } |
8ad15a0a | 1796 | } |
8ad15a0a JW |
1797 | } |
1798 | ||
f3e1097b | 1799 | return true; |
6cc309c9 JD |
1800 | } |
1801 | ||
1802 | ||
6de9cd9a | 1803 | /* Given a pointer to an interface pointer, remove duplicate |
284d58f1 | 1804 | interfaces and make sure that all symbols are either functions |
f3e1097b | 1805 | or subroutines, and all of the same kind. Returns true if |
284d58f1 | 1806 | something goes wrong. */ |
6de9cd9a | 1807 | |
f3e1097b | 1808 | static bool |
b251af97 | 1809 | check_interface0 (gfc_interface *p, const char *interface_name) |
6de9cd9a DN |
1810 | { |
1811 | gfc_interface *psave, *q, *qlast; | |
1812 | ||
1813 | psave = p; | |
6de9cd9a | 1814 | for (; p; p = p->next) |
284d58f1 DF |
1815 | { |
1816 | /* Make sure all symbols in the interface have been defined as | |
1817 | functions or subroutines. */ | |
c3f34952 TB |
1818 | if (((!p->sym->attr.function && !p->sym->attr.subroutine) |
1819 | || !p->sym->attr.if_source) | |
f6288c24 | 1820 | && !gfc_fl_struct (p->sym->attr.flavor)) |
284d58f1 | 1821 | { |
bcc478b9 BRF |
1822 | const char *guessed |
1823 | = gfc_lookup_function_fuzzy (p->sym->name, p->sym->ns->sym_root); | |
1824 | ||
284d58f1 | 1825 | if (p->sym->attr.external) |
bcc478b9 BRF |
1826 | if (guessed) |
1827 | gfc_error ("Procedure %qs in %s at %L has no explicit interface" | |
1828 | "; did you mean %qs?", | |
1829 | p->sym->name, interface_name, &p->sym->declared_at, | |
1830 | guessed); | |
1831 | else | |
1832 | gfc_error ("Procedure %qs in %s at %L has no explicit interface", | |
1833 | p->sym->name, interface_name, &p->sym->declared_at); | |
284d58f1 | 1834 | else |
bcc478b9 BRF |
1835 | if (guessed) |
1836 | gfc_error ("Procedure %qs in %s at %L is neither function nor " | |
1837 | "subroutine; did you mean %qs?", p->sym->name, | |
1838 | interface_name, &p->sym->declared_at, guessed); | |
1839 | else | |
1840 | gfc_error ("Procedure %qs in %s at %L is neither function nor " | |
1841 | "subroutine", p->sym->name, interface_name, | |
1842 | &p->sym->declared_at); | |
f3e1097b | 1843 | return true; |
284d58f1 DF |
1844 | } |
1845 | ||
1846 | /* Verify that procedures are either all SUBROUTINEs or all FUNCTIONs. */ | |
c3f34952 | 1847 | if ((psave->sym->attr.function && !p->sym->attr.function |
f6288c24 | 1848 | && !gfc_fl_struct (p->sym->attr.flavor)) |
284d58f1 DF |
1849 | || (psave->sym->attr.subroutine && !p->sym->attr.subroutine)) |
1850 | { | |
f6288c24 | 1851 | if (!gfc_fl_struct (p->sym->attr.flavor)) |
c3f34952 TB |
1852 | gfc_error ("In %s at %L procedures must be either all SUBROUTINEs" |
1853 | " or all FUNCTIONs", interface_name, | |
1854 | &p->sym->declared_at); | |
f6288c24 | 1855 | else if (p->sym->attr.flavor == FL_DERIVED) |
c3f34952 TB |
1856 | gfc_error ("In %s at %L procedures must be all FUNCTIONs as the " |
1857 | "generic name is also the name of a derived type", | |
1858 | interface_name, &p->sym->declared_at); | |
f3e1097b | 1859 | return true; |
284d58f1 | 1860 | } |
a300121e | 1861 | |
d2c5dbf2 | 1862 | /* F2003, C1207. F2008, C1207. */ |
a300121e | 1863 | if (p->sym->attr.proc == PROC_INTERNAL |
524af0d6 | 1864 | && !gfc_notify_std (GFC_STD_F2008, "Internal procedure " |
a4d9b221 | 1865 | "%qs in %s at %L", p->sym->name, |
524af0d6 | 1866 | interface_name, &p->sym->declared_at)) |
f3e1097b | 1867 | return true; |
284d58f1 | 1868 | } |
6de9cd9a DN |
1869 | p = psave; |
1870 | ||
1871 | /* Remove duplicate interfaces in this interface list. */ | |
1872 | for (; p; p = p->next) | |
1873 | { | |
1874 | qlast = p; | |
1875 | ||
1876 | for (q = p->next; q;) | |
1877 | { | |
1878 | if (p->sym != q->sym) | |
1879 | { | |
1880 | qlast = q; | |
1881 | q = q->next; | |
6de9cd9a DN |
1882 | } |
1883 | else | |
1884 | { | |
66e4ab31 | 1885 | /* Duplicate interface. */ |
6de9cd9a | 1886 | qlast->next = q->next; |
cede9502 | 1887 | free (q); |
6de9cd9a DN |
1888 | q = qlast->next; |
1889 | } | |
1890 | } | |
1891 | } | |
1892 | ||
f3e1097b | 1893 | return false; |
6de9cd9a DN |
1894 | } |
1895 | ||
1896 | ||
1897 | /* Check lists of interfaces to make sure that no two interfaces are | |
66e4ab31 | 1898 | ambiguous. Duplicate interfaces (from the same symbol) are OK here. */ |
6de9cd9a | 1899 | |
f3e1097b | 1900 | static bool |
b251af97 | 1901 | check_interface1 (gfc_interface *p, gfc_interface *q0, |
993ef28f | 1902 | int generic_flag, const char *interface_name, |
26f2ca2b | 1903 | bool referenced) |
6de9cd9a | 1904 | { |
b251af97 | 1905 | gfc_interface *q; |
6de9cd9a | 1906 | for (; p; p = p->next) |
991f3b12 | 1907 | for (q = q0; q; q = q->next) |
6de9cd9a DN |
1908 | { |
1909 | if (p->sym == q->sym) | |
66e4ab31 | 1910 | continue; /* Duplicates OK here. */ |
6de9cd9a | 1911 | |
312ae8f4 | 1912 | if (p->sym->name == q->sym->name && p->sym->module == q->sym->module) |
6de9cd9a DN |
1913 | continue; |
1914 | ||
f6288c24 FR |
1915 | if (!gfc_fl_struct (p->sym->attr.flavor) |
1916 | && !gfc_fl_struct (q->sym->attr.flavor) | |
c3f34952 | 1917 | && gfc_compare_interfaces (p->sym, q->sym, q->sym->name, |
6f3ab30d | 1918 | generic_flag, 0, NULL, 0, NULL, NULL)) |
6de9cd9a | 1919 | { |
993ef28f | 1920 | if (referenced) |
bd845c14 SK |
1921 | gfc_error ("Ambiguous interfaces in %s for %qs at %L " |
1922 | "and %qs at %L", interface_name, | |
1923 | q->sym->name, &q->sym->declared_at, | |
1924 | p->sym->name, &p->sym->declared_at); | |
ae7c61de | 1925 | else if (!p->sym->attr.use_assoc && q->sym->attr.use_assoc) |
bd845c14 SK |
1926 | gfc_warning (0, "Ambiguous interfaces in %s for %qs at %L " |
1927 | "and %qs at %L", interface_name, | |
1928 | q->sym->name, &q->sym->declared_at, | |
1929 | p->sym->name, &p->sym->declared_at); | |
ae7c61de | 1930 | else |
db30e21c | 1931 | gfc_warning (0, "Although not referenced, %qs has ambiguous " |
ae7c61de | 1932 | "interfaces at %L", interface_name, &p->where); |
f3e1097b | 1933 | return true; |
6de9cd9a DN |
1934 | } |
1935 | } | |
f3e1097b | 1936 | return false; |
6de9cd9a DN |
1937 | } |
1938 | ||
1939 | ||
1940 | /* Check the generic and operator interfaces of symbols to make sure | |
1941 | that none of the interfaces conflict. The check has to be done | |
1942 | after all of the symbols are actually loaded. */ | |
1943 | ||
1944 | static void | |
b251af97 | 1945 | check_sym_interfaces (gfc_symbol *sym) |
6de9cd9a | 1946 | { |
439d2350 | 1947 | char interface_name[GFC_MAX_SYMBOL_LEN + sizeof("generic interface ''")]; |
71f77fd7 | 1948 | gfc_interface *p; |
6de9cd9a DN |
1949 | |
1950 | if (sym->ns != gfc_current_ns) | |
1951 | return; | |
1952 | ||
1953 | if (sym->generic != NULL) | |
1954 | { | |
1955 | sprintf (interface_name, "generic interface '%s'", sym->name); | |
1956 | if (check_interface0 (sym->generic, interface_name)) | |
1957 | return; | |
1958 | ||
71f77fd7 PT |
1959 | for (p = sym->generic; p; p = p->next) |
1960 | { | |
abf86978 | 1961 | if (p->sym->attr.mod_proc |
4668d6f9 | 1962 | && !p->sym->attr.module_procedure |
abf86978 TB |
1963 | && (p->sym->attr.if_source != IFSRC_DECL |
1964 | || p->sym->attr.procedure)) | |
71f77fd7 | 1965 | { |
c4100eae | 1966 | gfc_error ("%qs at %L is not a module procedure", |
e9f63ace | 1967 | p->sym->name, &p->where); |
71f77fd7 PT |
1968 | return; |
1969 | } | |
1970 | } | |
1971 | ||
4c256e34 | 1972 | /* Originally, this test was applied to host interfaces too; |
993ef28f PT |
1973 | this is incorrect since host associated symbols, from any |
1974 | source, cannot be ambiguous with local symbols. */ | |
ae7c61de JW |
1975 | check_interface1 (sym->generic, sym->generic, 1, interface_name, |
1976 | sym->attr.referenced || !sym->attr.use_assoc); | |
6de9cd9a DN |
1977 | } |
1978 | } | |
1979 | ||
1980 | ||
1981 | static void | |
b251af97 | 1982 | check_uop_interfaces (gfc_user_op *uop) |
6de9cd9a | 1983 | { |
439d2350 | 1984 | char interface_name[GFC_MAX_SYMBOL_LEN + sizeof("operator interface ''")]; |
6de9cd9a DN |
1985 | gfc_user_op *uop2; |
1986 | gfc_namespace *ns; | |
1987 | ||
1988 | sprintf (interface_name, "operator interface '%s'", uop->name); | |
a1ee985f | 1989 | if (check_interface0 (uop->op, interface_name)) |
6de9cd9a DN |
1990 | return; |
1991 | ||
1992 | for (ns = gfc_current_ns; ns; ns = ns->parent) | |
1993 | { | |
1994 | uop2 = gfc_find_uop (uop->name, ns); | |
1995 | if (uop2 == NULL) | |
1996 | continue; | |
1997 | ||
a1ee985f | 1998 | check_interface1 (uop->op, uop2->op, 0, |
26f2ca2b | 1999 | interface_name, true); |
6de9cd9a DN |
2000 | } |
2001 | } | |
2002 | ||
fb03a37e TK |
2003 | /* Given an intrinsic op, return an equivalent op if one exists, |
2004 | or INTRINSIC_NONE otherwise. */ | |
2005 | ||
2006 | gfc_intrinsic_op | |
2007 | gfc_equivalent_op (gfc_intrinsic_op op) | |
2008 | { | |
2009 | switch(op) | |
2010 | { | |
2011 | case INTRINSIC_EQ: | |
2012 | return INTRINSIC_EQ_OS; | |
2013 | ||
2014 | case INTRINSIC_EQ_OS: | |
2015 | return INTRINSIC_EQ; | |
2016 | ||
2017 | case INTRINSIC_NE: | |
2018 | return INTRINSIC_NE_OS; | |
2019 | ||
2020 | case INTRINSIC_NE_OS: | |
2021 | return INTRINSIC_NE; | |
2022 | ||
2023 | case INTRINSIC_GT: | |
2024 | return INTRINSIC_GT_OS; | |
2025 | ||
2026 | case INTRINSIC_GT_OS: | |
2027 | return INTRINSIC_GT; | |
2028 | ||
2029 | case INTRINSIC_GE: | |
2030 | return INTRINSIC_GE_OS; | |
2031 | ||
2032 | case INTRINSIC_GE_OS: | |
2033 | return INTRINSIC_GE; | |
2034 | ||
2035 | case INTRINSIC_LT: | |
2036 | return INTRINSIC_LT_OS; | |
2037 | ||
2038 | case INTRINSIC_LT_OS: | |
2039 | return INTRINSIC_LT; | |
2040 | ||
2041 | case INTRINSIC_LE: | |
2042 | return INTRINSIC_LE_OS; | |
2043 | ||
2044 | case INTRINSIC_LE_OS: | |
2045 | return INTRINSIC_LE; | |
2046 | ||
2047 | default: | |
2048 | return INTRINSIC_NONE; | |
2049 | } | |
2050 | } | |
6de9cd9a DN |
2051 | |
2052 | /* For the namespace, check generic, user operator and intrinsic | |
2053 | operator interfaces for consistency and to remove duplicate | |
2054 | interfaces. We traverse the whole namespace, counting on the fact | |
2055 | that most symbols will not have generic or operator interfaces. */ | |
2056 | ||
2057 | void | |
b251af97 | 2058 | gfc_check_interfaces (gfc_namespace *ns) |
6de9cd9a DN |
2059 | { |
2060 | gfc_namespace *old_ns, *ns2; | |
439d2350 | 2061 | char interface_name[GFC_MAX_SYMBOL_LEN + sizeof("intrinsic '' operator")]; |
09639a83 | 2062 | int i; |
6de9cd9a DN |
2063 | |
2064 | old_ns = gfc_current_ns; | |
2065 | gfc_current_ns = ns; | |
2066 | ||
2067 | gfc_traverse_ns (ns, check_sym_interfaces); | |
2068 | ||
2069 | gfc_traverse_user_op (ns, check_uop_interfaces); | |
2070 | ||
2071 | for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++) | |
2072 | { | |
2073 | if (i == INTRINSIC_USER) | |
2074 | continue; | |
2075 | ||
2076 | if (i == INTRINSIC_ASSIGN) | |
2077 | strcpy (interface_name, "intrinsic assignment operator"); | |
2078 | else | |
2079 | sprintf (interface_name, "intrinsic '%s' operator", | |
09639a83 | 2080 | gfc_op2string ((gfc_intrinsic_op) i)); |
6de9cd9a | 2081 | |
a1ee985f | 2082 | if (check_interface0 (ns->op[i], interface_name)) |
6de9cd9a DN |
2083 | continue; |
2084 | ||
94747289 DK |
2085 | if (ns->op[i]) |
2086 | gfc_check_operator_interface (ns->op[i]->sym, (gfc_intrinsic_op) i, | |
2087 | ns->op[i]->where); | |
6de9cd9a | 2088 | |
3bed9dd0 DF |
2089 | for (ns2 = ns; ns2; ns2 = ns2->parent) |
2090 | { | |
fb03a37e | 2091 | gfc_intrinsic_op other_op; |
8b704316 | 2092 | |
a1ee985f | 2093 | if (check_interface1 (ns->op[i], ns2->op[i], 0, |
3bed9dd0 DF |
2094 | interface_name, true)) |
2095 | goto done; | |
2096 | ||
fb03a37e TK |
2097 | /* i should be gfc_intrinsic_op, but has to be int with this cast |
2098 | here for stupid C++ compatibility rules. */ | |
2099 | other_op = gfc_equivalent_op ((gfc_intrinsic_op) i); | |
2100 | if (other_op != INTRINSIC_NONE | |
2101 | && check_interface1 (ns->op[i], ns2->op[other_op], | |
2102 | 0, interface_name, true)) | |
2103 | goto done; | |
3bed9dd0 | 2104 | } |
6de9cd9a DN |
2105 | } |
2106 | ||
3bed9dd0 | 2107 | done: |
6de9cd9a DN |
2108 | gfc_current_ns = old_ns; |
2109 | } | |
2110 | ||
2111 | ||
aa08038d EE |
2112 | /* Given a symbol of a formal argument list and an expression, if the |
2113 | formal argument is allocatable, check that the actual argument is | |
f3e1097b | 2114 | allocatable. Returns true if compatible, zero if not compatible. */ |
aa08038d | 2115 | |
f3e1097b | 2116 | static bool |
b251af97 | 2117 | compare_allocatable (gfc_symbol *formal, gfc_expr *actual) |
aa08038d | 2118 | { |
5ac13b8e JW |
2119 | if (formal->attr.allocatable |
2120 | || (formal->ts.type == BT_CLASS && CLASS_DATA (formal)->attr.allocatable)) | |
aa08038d | 2121 | { |
fec5ce24 JW |
2122 | symbol_attribute attr = gfc_expr_attr (actual); |
2123 | if (actual->ts.type == BT_CLASS && !attr.class_ok) | |
f3e1097b | 2124 | return true; |
fec5ce24 | 2125 | else if (!attr.allocatable) |
f3e1097b | 2126 | return false; |
aa08038d EE |
2127 | } |
2128 | ||
f3e1097b | 2129 | return true; |
aa08038d EE |
2130 | } |
2131 | ||
2132 | ||
6de9cd9a DN |
2133 | /* Given a symbol of a formal argument list and an expression, if the |
2134 | formal argument is a pointer, see if the actual argument is a | |
2135 | pointer. Returns nonzero if compatible, zero if not compatible. */ | |
2136 | ||
2137 | static int | |
b251af97 | 2138 | compare_pointer (gfc_symbol *formal, gfc_expr *actual) |
6de9cd9a DN |
2139 | { |
2140 | symbol_attribute attr; | |
2141 | ||
f18075ff TB |
2142 | if (formal->attr.pointer |
2143 | || (formal->ts.type == BT_CLASS && CLASS_DATA (formal) | |
2144 | && CLASS_DATA (formal)->attr.class_pointer)) | |
6de9cd9a DN |
2145 | { |
2146 | attr = gfc_expr_attr (actual); | |
7d54ef80 TB |
2147 | |
2148 | /* Fortran 2008 allows non-pointer actual arguments. */ | |
2149 | if (!attr.pointer && attr.target && formal->attr.intent == INTENT_IN) | |
2150 | return 2; | |
2151 | ||
6de9cd9a DN |
2152 | if (!attr.pointer) |
2153 | return 0; | |
2154 | } | |
2155 | ||
2156 | return 1; | |
2157 | } | |
2158 | ||
2159 | ||
a516520c PT |
2160 | /* Emit clear error messages for rank mismatch. */ |
2161 | ||
2162 | static void | |
2163 | argument_rank_mismatch (const char *name, locus *where, | |
2164 | int rank1, int rank2) | |
2165 | { | |
c62c6622 TB |
2166 | |
2167 | /* TS 29113, C407b. */ | |
2168 | if (rank2 == -1) | |
2700d0e3 JJ |
2169 | gfc_error ("The assumed-rank array at %L requires that the dummy argument" |
2170 | " %qs has assumed-rank", where, name); | |
c62c6622 | 2171 | else if (rank1 == 0) |
2700d0e3 JJ |
2172 | gfc_error_opt (OPT_Wargument_mismatch, "Rank mismatch in argument %qs " |
2173 | "at %L (scalar and rank-%d)", name, where, rank2); | |
a516520c | 2174 | else if (rank2 == 0) |
2700d0e3 JJ |
2175 | gfc_error_opt (OPT_Wargument_mismatch, "Rank mismatch in argument %qs " |
2176 | "at %L (rank-%d and scalar)", name, where, rank1); | |
a516520c | 2177 | else |
2700d0e3 JJ |
2178 | gfc_error_opt (OPT_Wargument_mismatch, "Rank mismatch in argument %qs " |
2179 | "at %L (rank-%d and rank-%d)", name, where, rank1, rank2); | |
a516520c PT |
2180 | } |
2181 | ||
2182 | ||
6de9cd9a | 2183 | /* Given a symbol of a formal argument list and an expression, see if |
f3e1097b JW |
2184 | the two are compatible as arguments. Returns true if |
2185 | compatible, false if not compatible. */ | |
6de9cd9a | 2186 | |
f3e1097b | 2187 | static bool |
b251af97 | 2188 | compare_parameter (gfc_symbol *formal, gfc_expr *actual, |
5ad6345e | 2189 | int ranks_must_agree, int is_elemental, locus *where) |
6de9cd9a DN |
2190 | { |
2191 | gfc_ref *ref; | |
975b975b | 2192 | bool rank_check, is_pointer; |
5c0ba546 JW |
2193 | char err[200]; |
2194 | gfc_component *ppc; | |
6de9cd9a | 2195 | |
a8b3b0b6 CR |
2196 | /* If the formal arg has type BT_VOID, it's to one of the iso_c_binding |
2197 | procs c_f_pointer or c_f_procpointer, and we need to accept most | |
2198 | pointers the user could give us. This should allow that. */ | |
2199 | if (formal->ts.type == BT_VOID) | |
f3e1097b | 2200 | return true; |
a8b3b0b6 CR |
2201 | |
2202 | if (formal->ts.type == BT_DERIVED | |
bc21d315 | 2203 | && formal->ts.u.derived && formal->ts.u.derived->ts.is_iso_c |
a8b3b0b6 | 2204 | && actual->ts.type == BT_DERIVED |
bc21d315 | 2205 | && actual->ts.u.derived && actual->ts.u.derived->ts.is_iso_c) |
f3e1097b | 2206 | return true; |
a8b3b0b6 | 2207 | |
7d58b9e7 | 2208 | if (formal->ts.type == BT_CLASS && actual->ts.type == BT_DERIVED) |
e10f52d0 JW |
2209 | /* Make sure the vtab symbol is present when |
2210 | the module variables are generated. */ | |
7d58b9e7 | 2211 | gfc_find_derived_vtab (actual->ts.u.derived); |
e10f52d0 | 2212 | |
6de9cd9a DN |
2213 | if (actual->ts.type == BT_PROCEDURE) |
2214 | { | |
9b63f282 | 2215 | gfc_symbol *act_sym = actual->symtree->n.sym; |
6de9cd9a | 2216 | |
8ad15a0a JW |
2217 | if (formal->attr.flavor != FL_PROCEDURE) |
2218 | { | |
2219 | if (where) | |
2220 | gfc_error ("Invalid procedure argument at %L", &actual->where); | |
f3e1097b | 2221 | return false; |
8ad15a0a | 2222 | } |
6de9cd9a | 2223 | |
889dc035 | 2224 | if (!gfc_compare_interfaces (formal, act_sym, act_sym->name, 0, 1, err, |
6f3ab30d | 2225 | sizeof(err), NULL, NULL)) |
8ad15a0a JW |
2226 | { |
2227 | if (where) | |
2700d0e3 JJ |
2228 | gfc_error_opt (OPT_Wargument_mismatch, |
2229 | "Interface mismatch in dummy procedure %qs at %L:" | |
2230 | " %s", formal->name, &actual->where, err); | |
f3e1097b | 2231 | return false; |
8ad15a0a | 2232 | } |
5ad6345e | 2233 | |
9b63f282 | 2234 | if (formal->attr.function && !act_sym->attr.function) |
03bd096b JW |
2235 | { |
2236 | gfc_add_function (&act_sym->attr, act_sym->name, | |
2237 | &act_sym->declared_at); | |
2238 | if (act_sym->ts.type == BT_UNKNOWN | |
524af0d6 | 2239 | && !gfc_set_default_type (act_sym, 1, act_sym->ns)) |
f3e1097b | 2240 | return false; |
03bd096b JW |
2241 | } |
2242 | else if (formal->attr.subroutine && !act_sym->attr.subroutine) | |
9b63f282 JW |
2243 | gfc_add_subroutine (&act_sym->attr, act_sym->name, |
2244 | &act_sym->declared_at); | |
2245 | ||
f3e1097b | 2246 | return true; |
6de9cd9a DN |
2247 | } |
2248 | ||
5c0ba546 | 2249 | ppc = gfc_get_proc_ptr_comp (actual); |
228eb42a | 2250 | if (ppc && ppc->ts.interface) |
5c0ba546 JW |
2251 | { |
2252 | if (!gfc_compare_interfaces (formal, ppc->ts.interface, ppc->name, 0, 1, | |
2253 | err, sizeof(err), NULL, NULL)) | |
2254 | { | |
2255 | if (where) | |
2700d0e3 JJ |
2256 | gfc_error_opt (OPT_Wargument_mismatch, |
2257 | "Interface mismatch in dummy procedure %qs at %L:" | |
2258 | " %s", formal->name, &actual->where, err); | |
f3e1097b | 2259 | return false; |
5c0ba546 JW |
2260 | } |
2261 | } | |
2262 | ||
fe4e525c TB |
2263 | /* F2008, C1241. */ |
2264 | if (formal->attr.pointer && formal->attr.contiguous | |
460263d0 | 2265 | && !gfc_is_simply_contiguous (actual, true, false)) |
fe4e525c TB |
2266 | { |
2267 | if (where) | |
c4100eae | 2268 | gfc_error ("Actual argument to contiguous pointer dummy %qs at %L " |
62732c30 | 2269 | "must be simply contiguous", formal->name, &actual->where); |
f3e1097b | 2270 | return false; |
fe4e525c TB |
2271 | } |
2272 | ||
fec5ce24 JW |
2273 | symbol_attribute actual_attr = gfc_expr_attr (actual); |
2274 | if (actual->ts.type == BT_CLASS && !actual_attr.class_ok) | |
f3e1097b | 2275 | return true; |
fec5ce24 | 2276 | |
90aeadcb | 2277 | if ((actual->expr_type != EXPR_NULL || actual->ts.type != BT_UNKNOWN) |
df161b69 | 2278 | && actual->ts.type != BT_HOLLERITH |
45a69325 | 2279 | && formal->ts.type != BT_ASSUMED |
e7ac6a7c | 2280 | && !(formal->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK)) |
c49ea23d PT |
2281 | && !gfc_compare_types (&formal->ts, &actual->ts) |
2282 | && !(formal->ts.type == BT_DERIVED && actual->ts.type == BT_CLASS | |
8b704316 | 2283 | && gfc_compare_derived_types (formal->ts.u.derived, |
c49ea23d | 2284 | CLASS_DATA (actual)->ts.u.derived))) |
5ad6345e | 2285 | { |
d68e117b | 2286 | if (where) |
2700d0e3 JJ |
2287 | gfc_error_opt (OPT_Wargument_mismatch, |
2288 | "Type mismatch in argument %qs at %L; passed %s to %s", | |
2289 | formal->name, where, gfc_typename (&actual->ts), | |
2290 | gfc_typename (&formal->ts)); | |
f3e1097b | 2291 | return false; |
5ad6345e | 2292 | } |
f18075ff | 2293 | |
3d54e576 TB |
2294 | if (actual->ts.type == BT_ASSUMED && formal->ts.type != BT_ASSUMED) |
2295 | { | |
2296 | if (where) | |
2297 | gfc_error ("Assumed-type actual argument at %L requires that dummy " | |
c4100eae | 2298 | "argument %qs is of assumed type", &actual->where, |
3d54e576 | 2299 | formal->name); |
f3e1097b | 2300 | return false; |
3d54e576 TB |
2301 | } |
2302 | ||
f18075ff | 2303 | /* F2008, 12.5.2.5; IR F08/0073. */ |
67b1d004 JW |
2304 | if (formal->ts.type == BT_CLASS && formal->attr.class_ok |
2305 | && actual->expr_type != EXPR_NULL | |
f18075ff | 2306 | && ((CLASS_DATA (formal)->attr.class_pointer |
86eb9e2f | 2307 | && formal->attr.intent != INTENT_IN) |
5ac13b8e JW |
2308 | || CLASS_DATA (formal)->attr.allocatable)) |
2309 | { | |
2310 | if (actual->ts.type != BT_CLASS) | |
2311 | { | |
2312 | if (where) | |
c4100eae | 2313 | gfc_error ("Actual argument to %qs at %L must be polymorphic", |
5ac13b8e | 2314 | formal->name, &actual->where); |
f3e1097b | 2315 | return false; |
5ac13b8e | 2316 | } |
67b1d004 | 2317 | |
a8267f8d TB |
2318 | if ((!UNLIMITED_POLY (formal) || !UNLIMITED_POLY(actual)) |
2319 | && !gfc_compare_derived_types (CLASS_DATA (actual)->ts.u.derived, | |
2320 | CLASS_DATA (formal)->ts.u.derived)) | |
5ac13b8e JW |
2321 | { |
2322 | if (where) | |
c4100eae | 2323 | gfc_error ("Actual argument to %qs at %L must have the same " |
5ac13b8e | 2324 | "declared type", formal->name, &actual->where); |
f3e1097b | 2325 | return false; |
5ac13b8e JW |
2326 | } |
2327 | } | |
6de9cd9a | 2328 | |
8b704316 PT |
2329 | /* F08: 12.5.2.5 Allocatable and pointer dummy variables. However, this |
2330 | is necessary also for F03, so retain error for both. | |
2331 | NOTE: Other type/kind errors pre-empt this error. Since they are F03 | |
2332 | compatible, no attempt has been made to channel to this one. */ | |
2333 | if (UNLIMITED_POLY (formal) && !UNLIMITED_POLY (actual) | |
2334 | && (CLASS_DATA (formal)->attr.allocatable | |
2335 | ||CLASS_DATA (formal)->attr.class_pointer)) | |
2336 | { | |
2337 | if (where) | |
c4100eae | 2338 | gfc_error ("Actual argument to %qs at %L must be unlimited " |
8b704316 PT |
2339 | "polymorphic since the formal argument is a " |
2340 | "pointer or allocatable unlimited polymorphic " | |
2341 | "entity [F2008: 12.5.2.5]", formal->name, | |
2342 | &actual->where); | |
f3e1097b | 2343 | return false; |
8b704316 PT |
2344 | } |
2345 | ||
394d3a2e | 2346 | if (formal->attr.codimension && !gfc_is_coarray (actual)) |
d3a9eea2 | 2347 | { |
394d3a2e | 2348 | if (where) |
c4100eae | 2349 | gfc_error ("Actual argument to %qs at %L must be a coarray", |
d3a9eea2 | 2350 | formal->name, &actual->where); |
f3e1097b | 2351 | return false; |
394d3a2e | 2352 | } |
d3a9eea2 | 2353 | |
394d3a2e TB |
2354 | if (formal->attr.codimension && formal->attr.allocatable) |
2355 | { | |
2356 | gfc_ref *last = NULL; | |
a3935ffc | 2357 | |
d3a9eea2 | 2358 | for (ref = actual->ref; ref; ref = ref->next) |
394d3a2e TB |
2359 | if (ref->type == REF_COMPONENT) |
2360 | last = ref; | |
d3a9eea2 | 2361 | |
d3a9eea2 | 2362 | /* F2008, 12.5.2.6. */ |
394d3a2e TB |
2363 | if ((last && last->u.c.component->as->corank != formal->as->corank) |
2364 | || (!last | |
2365 | && actual->symtree->n.sym->as->corank != formal->as->corank)) | |
d3a9eea2 TB |
2366 | { |
2367 | if (where) | |
c4100eae | 2368 | gfc_error ("Corank mismatch in argument %qs at %L (%d and %d)", |
d3a9eea2 TB |
2369 | formal->name, &actual->where, formal->as->corank, |
2370 | last ? last->u.c.component->as->corank | |
2371 | : actual->symtree->n.sym->as->corank); | |
f3e1097b | 2372 | return false; |
d3a9eea2 | 2373 | } |
394d3a2e | 2374 | } |
fe4e525c | 2375 | |
394d3a2e TB |
2376 | if (formal->attr.codimension) |
2377 | { | |
460263d0 | 2378 | /* F2008, 12.5.2.8 + Corrig 2 (IR F08/0048). */ |
8179b067 | 2379 | /* F2018, 12.5.2.8. */ |
fe4e525c TB |
2380 | if (formal->attr.dimension |
2381 | && (formal->attr.contiguous || formal->as->type != AS_ASSUMED_SHAPE) | |
fec5ce24 | 2382 | && actual_attr.dimension |
460263d0 | 2383 | && !gfc_is_simply_contiguous (actual, true, true)) |
fe4e525c TB |
2384 | { |
2385 | if (where) | |
c4100eae | 2386 | gfc_error ("Actual argument to %qs at %L must be simply " |
460263d0 TB |
2387 | "contiguous or an element of such an array", |
2388 | formal->name, &actual->where); | |
f3e1097b | 2389 | return false; |
fe4e525c | 2390 | } |
fea54935 TB |
2391 | |
2392 | /* F2008, C1303 and C1304. */ | |
2393 | if (formal->attr.intent != INTENT_INOUT | |
2394 | && (((formal->ts.type == BT_DERIVED || formal->ts.type == BT_CLASS) | |
2395 | && formal->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV | |
2396 | && formal->ts.u.derived->intmod_sym_id == ISOFORTRAN_LOCK_TYPE) | |
2397 | || formal->attr.lock_comp)) | |
2398 | ||
2399 | { | |
2400 | if (where) | |
c4100eae | 2401 | gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, " |
fea54935 TB |
2402 | "which is LOCK_TYPE or has a LOCK_TYPE component", |
2403 | formal->name, &actual->where); | |
f3e1097b | 2404 | return false; |
fea54935 | 2405 | } |
5df445a2 TB |
2406 | |
2407 | /* TS18508, C702/C703. */ | |
2408 | if (formal->attr.intent != INTENT_INOUT | |
2409 | && (((formal->ts.type == BT_DERIVED || formal->ts.type == BT_CLASS) | |
2410 | && formal->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV | |
2411 | && formal->ts.u.derived->intmod_sym_id == ISOFORTRAN_EVENT_TYPE) | |
2412 | || formal->attr.event_comp)) | |
2413 | ||
2414 | { | |
2415 | if (where) | |
2416 | gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, " | |
2417 | "which is EVENT_TYPE or has a EVENT_TYPE component", | |
2418 | formal->name, &actual->where); | |
f3e1097b | 2419 | return false; |
5df445a2 | 2420 | } |
394d3a2e | 2421 | } |
fe4e525c TB |
2422 | |
2423 | /* F2008, C1239/C1240. */ | |
2424 | if (actual->expr_type == EXPR_VARIABLE | |
2425 | && (actual->symtree->n.sym->attr.asynchronous | |
2426 | || actual->symtree->n.sym->attr.volatile_) | |
2427 | && (formal->attr.asynchronous || formal->attr.volatile_) | |
460263d0 TB |
2428 | && actual->rank && formal->as |
2429 | && !gfc_is_simply_contiguous (actual, true, false) | |
f188272d TB |
2430 | && ((formal->as->type != AS_ASSUMED_SHAPE |
2431 | && formal->as->type != AS_ASSUMED_RANK && !formal->attr.pointer) | |
fe4e525c TB |
2432 | || formal->attr.contiguous)) |
2433 | { | |
2434 | if (where) | |
c4100eae | 2435 | gfc_error ("Dummy argument %qs has to be a pointer, assumed-shape or " |
f188272d TB |
2436 | "assumed-rank array without CONTIGUOUS attribute - as actual" |
2437 | " argument at %L is not simply contiguous and both are " | |
2438 | "ASYNCHRONOUS or VOLATILE", formal->name, &actual->where); | |
f3e1097b | 2439 | return false; |
d3a9eea2 TB |
2440 | } |
2441 | ||
427180d2 | 2442 | if (formal->attr.allocatable && !formal->attr.codimension |
fec5ce24 | 2443 | && actual_attr.codimension) |
427180d2 TB |
2444 | { |
2445 | if (formal->attr.intent == INTENT_OUT) | |
2446 | { | |
2447 | if (where) | |
2448 | gfc_error ("Passing coarray at %L to allocatable, noncoarray, " | |
c4100eae | 2449 | "INTENT(OUT) dummy argument %qs", &actual->where, |
427180d2 | 2450 | formal->name); |
f3e1097b | 2451 | return false; |
427180d2 | 2452 | } |
73e42eef | 2453 | else if (warn_surprising && where && formal->attr.intent != INTENT_IN) |
48749dbc MLI |
2454 | gfc_warning (OPT_Wsurprising, |
2455 | "Passing coarray at %L to allocatable, noncoarray dummy " | |
2456 | "argument %qs, which is invalid if the allocation status" | |
427180d2 TB |
2457 | " is modified", &actual->where, formal->name); |
2458 | } | |
2459 | ||
c62c6622 TB |
2460 | /* If the rank is the same or the formal argument has assumed-rank. */ |
2461 | if (symbol_rank (formal) == actual->rank || symbol_rank (formal) == -1) | |
f3e1097b | 2462 | return true; |
6de9cd9a | 2463 | |
5ad6345e TB |
2464 | rank_check = where != NULL && !is_elemental && formal->as |
2465 | && (formal->as->type == AS_ASSUMED_SHAPE | |
d8a8dab3 TB |
2466 | || formal->as->type == AS_DEFERRED) |
2467 | && actual->expr_type != EXPR_NULL; | |
6de9cd9a | 2468 | |
e7ac6a7c TB |
2469 | /* Skip rank checks for NO_ARG_CHECK. */ |
2470 | if (formal->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK)) | |
f3e1097b | 2471 | return true; |
e7ac6a7c | 2472 | |
d3a9eea2 | 2473 | /* Scalar & coindexed, see: F2008, Section 12.5.2.4. */ |
d8a8dab3 TB |
2474 | if (rank_check || ranks_must_agree |
2475 | || (formal->attr.pointer && actual->expr_type != EXPR_NULL) | |
5ad6345e | 2476 | || (actual->rank != 0 && !(is_elemental || formal->attr.dimension)) |
c49ea23d PT |
2477 | || (actual->rank == 0 |
2478 | && ((formal->ts.type == BT_CLASS | |
2479 | && CLASS_DATA (formal)->as->type == AS_ASSUMED_SHAPE) | |
2480 | || (formal->ts.type != BT_CLASS | |
2481 | && formal->as->type == AS_ASSUMED_SHAPE)) | |
08857b61 | 2482 | && actual->expr_type != EXPR_NULL) |
d3a9eea2 TB |
2483 | || (actual->rank == 0 && formal->attr.dimension |
2484 | && gfc_is_coindexed (actual))) | |
5ad6345e TB |
2485 | { |
2486 | if (where) | |
a516520c PT |
2487 | argument_rank_mismatch (formal->name, &actual->where, |
2488 | symbol_rank (formal), actual->rank); | |
f3e1097b | 2489 | return false; |
5ad6345e TB |
2490 | } |
2491 | else if (actual->rank != 0 && (is_elemental || formal->attr.dimension)) | |
f3e1097b | 2492 | return true; |
5ad6345e TB |
2493 | |
2494 | /* At this point, we are considering a scalar passed to an array. This | |
975b975b | 2495 | is valid (cf. F95 12.4.1.1, F2003 12.4.1.2, and F2008 12.5.2.4), |
5ad6345e | 2496 | - if the actual argument is (a substring of) an element of a |
975b975b TB |
2497 | non-assumed-shape/non-pointer/non-polymorphic array; or |
2498 | - (F2003) if the actual argument is of type character of default/c_char | |
2499 | kind. */ | |
2500 | ||
2501 | is_pointer = actual->expr_type == EXPR_VARIABLE | |
2502 | ? actual->symtree->n.sym->attr.pointer : false; | |
6de9cd9a DN |
2503 | |
2504 | for (ref = actual->ref; ref; ref = ref->next) | |
975b975b TB |
2505 | { |
2506 | if (ref->type == REF_COMPONENT) | |
2507 | is_pointer = ref->u.c.component->attr.pointer; | |
2508 | else if (ref->type == REF_ARRAY && ref->u.ar.type == AR_ELEMENT | |
2509 | && ref->u.ar.dimen > 0 | |
8b704316 | 2510 | && (!ref->next |
975b975b TB |
2511 | || (ref->next->type == REF_SUBSTRING && !ref->next->next))) |
2512 | break; | |
2513 | } | |
2514 | ||
2515 | if (actual->ts.type == BT_CLASS && actual->expr_type != EXPR_NULL) | |
2516 | { | |
2517 | if (where) | |
c4100eae | 2518 | gfc_error ("Polymorphic scalar passed to array dummy argument %qs " |
975b975b | 2519 | "at %L", formal->name, &actual->where); |
f3e1097b | 2520 | return false; |
975b975b TB |
2521 | } |
2522 | ||
2523 | if (actual->expr_type != EXPR_NULL && ref && actual->ts.type != BT_CHARACTER | |
2524 | && (is_pointer || ref->u.ar.as->type == AS_ASSUMED_SHAPE)) | |
2525 | { | |
2526 | if (where) | |
2527 | gfc_error ("Element of assumed-shaped or pointer " | |
c4100eae | 2528 | "array passed to array dummy argument %qs at %L", |
975b975b | 2529 | formal->name, &actual->where); |
f3e1097b | 2530 | return false; |
975b975b | 2531 | } |
6de9cd9a | 2532 | |
975b975b TB |
2533 | if (actual->ts.type == BT_CHARACTER && actual->expr_type != EXPR_NULL |
2534 | && (!ref || is_pointer || ref->u.ar.as->type == AS_ASSUMED_SHAPE)) | |
5ad6345e | 2535 | { |
975b975b TB |
2536 | if (formal->ts.kind != 1 && (gfc_option.allow_std & GFC_STD_GNU) == 0) |
2537 | { | |
2538 | if (where) | |
2539 | gfc_error ("Extension: Scalar non-default-kind, non-C_CHAR-kind " | |
2540 | "CHARACTER actual argument with array dummy argument " | |
c4100eae | 2541 | "%qs at %L", formal->name, &actual->where); |
f3e1097b | 2542 | return false; |
975b975b TB |
2543 | } |
2544 | ||
5ad6345e TB |
2545 | if (where && (gfc_option.allow_std & GFC_STD_F2003) == 0) |
2546 | { | |
2547 | gfc_error ("Fortran 2003: Scalar CHARACTER actual argument with " | |
c4100eae | 2548 | "array dummy argument %qs at %L", |
5ad6345e | 2549 | formal->name, &actual->where); |
f3e1097b | 2550 | return false; |
5ad6345e | 2551 | } |
5ad6345e | 2552 | else |
f3e1097b | 2553 | return ((gfc_option.allow_std & GFC_STD_F2003) != 0); |
5ad6345e | 2554 | } |
975b975b TB |
2555 | |
2556 | if (ref == NULL && actual->expr_type != EXPR_NULL) | |
5ad6345e TB |
2557 | { |
2558 | if (where) | |
a516520c PT |
2559 | argument_rank_mismatch (formal->name, &actual->where, |
2560 | symbol_rank (formal), actual->rank); | |
f3e1097b | 2561 | return false; |
5ad6345e TB |
2562 | } |
2563 | ||
f3e1097b | 2564 | return true; |
6de9cd9a DN |
2565 | } |
2566 | ||
2567 | ||
2d5b90b2 TB |
2568 | /* Returns the storage size of a symbol (formal argument) or |
2569 | zero if it cannot be determined. */ | |
2570 | ||
2571 | static unsigned long | |
2572 | get_sym_storage_size (gfc_symbol *sym) | |
2573 | { | |
2574 | int i; | |
2575 | unsigned long strlen, elements; | |
2576 | ||
2577 | if (sym->ts.type == BT_CHARACTER) | |
2578 | { | |
bc21d315 JW |
2579 | if (sym->ts.u.cl && sym->ts.u.cl->length |
2580 | && sym->ts.u.cl->length->expr_type == EXPR_CONSTANT) | |
2581 | strlen = mpz_get_ui (sym->ts.u.cl->length->value.integer); | |
2d5b90b2 TB |
2582 | else |
2583 | return 0; | |
2584 | } | |
2585 | else | |
8b704316 | 2586 | strlen = 1; |
2d5b90b2 TB |
2587 | |
2588 | if (symbol_rank (sym) == 0) | |
2589 | return strlen; | |
2590 | ||
2591 | elements = 1; | |
2592 | if (sym->as->type != AS_EXPLICIT) | |
2593 | return 0; | |
2594 | for (i = 0; i < sym->as->rank; i++) | |
2595 | { | |
efb63364 | 2596 | if (sym->as->upper[i]->expr_type != EXPR_CONSTANT |
2d5b90b2 TB |
2597 | || sym->as->lower[i]->expr_type != EXPR_CONSTANT) |
2598 | return 0; | |
2599 | ||
c13af44b SK |
2600 | elements *= mpz_get_si (sym->as->upper[i]->value.integer) |
2601 | - mpz_get_si (sym->as->lower[i]->value.integer) + 1L; | |
2d5b90b2 TB |
2602 | } |
2603 | ||
2604 | return strlen*elements; | |
2605 | } | |
2606 | ||
2607 | ||
2608 | /* Returns the storage size of an expression (actual argument) or | |
2609 | zero if it cannot be determined. For an array element, it returns | |
1207ac67 | 2610 | the remaining size as the element sequence consists of all storage |
2d5b90b2 TB |
2611 | units of the actual argument up to the end of the array. */ |
2612 | ||
2613 | static unsigned long | |
2614 | get_expr_storage_size (gfc_expr *e) | |
2615 | { | |
2616 | int i; | |
2617 | long int strlen, elements; | |
6da0839a | 2618 | long int substrlen = 0; |
a0710c29 | 2619 | bool is_str_storage = false; |
2d5b90b2 TB |
2620 | gfc_ref *ref; |
2621 | ||
2622 | if (e == NULL) | |
2623 | return 0; | |
8b704316 | 2624 | |
2d5b90b2 TB |
2625 | if (e->ts.type == BT_CHARACTER) |
2626 | { | |
bc21d315 JW |
2627 | if (e->ts.u.cl && e->ts.u.cl->length |
2628 | && e->ts.u.cl->length->expr_type == EXPR_CONSTANT) | |
2629 | strlen = mpz_get_si (e->ts.u.cl->length->value.integer); | |
2d5b90b2 | 2630 | else if (e->expr_type == EXPR_CONSTANT |
bc21d315 | 2631 | && (e->ts.u.cl == NULL || e->ts.u.cl->length == NULL)) |
2d5b90b2 TB |
2632 | strlen = e->value.character.length; |
2633 | else | |
2634 | return 0; | |
2635 | } | |
2636 | else | |
2637 | strlen = 1; /* Length per element. */ | |
2638 | ||
2639 | if (e->rank == 0 && !e->ref) | |
2640 | return strlen; | |
2641 | ||
2642 | elements = 1; | |
2643 | if (!e->ref) | |
2644 | { | |
2645 | if (!e->shape) | |
2646 | return 0; | |
2647 | for (i = 0; i < e->rank; i++) | |
2648 | elements *= mpz_get_si (e->shape[i]); | |
2649 | return elements*strlen; | |
2650 | } | |
2651 | ||
2652 | for (ref = e->ref; ref; ref = ref->next) | |
2653 | { | |
6da0839a TB |
2654 | if (ref->type == REF_SUBSTRING && ref->u.ss.start |
2655 | && ref->u.ss.start->expr_type == EXPR_CONSTANT) | |
2656 | { | |
a0710c29 TB |
2657 | if (is_str_storage) |
2658 | { | |
2659 | /* The string length is the substring length. | |
2660 | Set now to full string length. */ | |
e323640f | 2661 | if (!ref->u.ss.length || !ref->u.ss.length->length |
a0710c29 TB |
2662 | || ref->u.ss.length->length->expr_type != EXPR_CONSTANT) |
2663 | return 0; | |
2664 | ||
2665 | strlen = mpz_get_ui (ref->u.ss.length->length->value.integer); | |
2666 | } | |
2667 | substrlen = strlen - mpz_get_ui (ref->u.ss.start->value.integer) + 1; | |
6da0839a TB |
2668 | continue; |
2669 | } | |
2670 | ||
efb63364 | 2671 | if (ref->type == REF_ARRAY && ref->u.ar.type == AR_SECTION) |
2d5b90b2 TB |
2672 | for (i = 0; i < ref->u.ar.dimen; i++) |
2673 | { | |
2674 | long int start, end, stride; | |
2675 | stride = 1; | |
37639728 | 2676 | |
2d5b90b2 TB |
2677 | if (ref->u.ar.stride[i]) |
2678 | { | |
2679 | if (ref->u.ar.stride[i]->expr_type == EXPR_CONSTANT) | |
2680 | stride = mpz_get_si (ref->u.ar.stride[i]->value.integer); | |
2681 | else | |
2682 | return 0; | |
2683 | } | |
2684 | ||
2685 | if (ref->u.ar.start[i]) | |
2686 | { | |
2687 | if (ref->u.ar.start[i]->expr_type == EXPR_CONSTANT) | |
2688 | start = mpz_get_si (ref->u.ar.start[i]->value.integer); | |
2689 | else | |
2690 | return 0; | |
2691 | } | |
37639728 TB |
2692 | else if (ref->u.ar.as->lower[i] |
2693 | && ref->u.ar.as->lower[i]->expr_type == EXPR_CONSTANT) | |
2694 | start = mpz_get_si (ref->u.ar.as->lower[i]->value.integer); | |
2695 | else | |
2696 | return 0; | |
2d5b90b2 TB |
2697 | |
2698 | if (ref->u.ar.end[i]) | |
2699 | { | |
2700 | if (ref->u.ar.end[i]->expr_type == EXPR_CONSTANT) | |
2701 | end = mpz_get_si (ref->u.ar.end[i]->value.integer); | |
2702 | else | |
2703 | return 0; | |
2704 | } | |
2705 | else if (ref->u.ar.as->upper[i] | |
2706 | && ref->u.ar.as->upper[i]->expr_type == EXPR_CONSTANT) | |
2707 | end = mpz_get_si (ref->u.ar.as->upper[i]->value.integer); | |
2708 | else | |
2709 | return 0; | |
2710 | ||
2711 | elements *= (end - start)/stride + 1L; | |
2712 | } | |
c6423ef3 | 2713 | else if (ref->type == REF_ARRAY && ref->u.ar.type == AR_FULL) |
2d5b90b2 TB |
2714 | for (i = 0; i < ref->u.ar.as->rank; i++) |
2715 | { | |
2716 | if (ref->u.ar.as->lower[i] && ref->u.ar.as->upper[i] | |
2717 | && ref->u.ar.as->lower[i]->expr_type == EXPR_CONSTANT | |
edcc76d5 SK |
2718 | && ref->u.ar.as->lower[i]->ts.type == BT_INTEGER |
2719 | && ref->u.ar.as->upper[i]->expr_type == EXPR_CONSTANT | |
2720 | && ref->u.ar.as->upper[i]->ts.type == BT_INTEGER) | |
da9ad923 TB |
2721 | elements *= mpz_get_si (ref->u.ar.as->upper[i]->value.integer) |
2722 | - mpz_get_si (ref->u.ar.as->lower[i]->value.integer) | |
2d5b90b2 TB |
2723 | + 1L; |
2724 | else | |
2725 | return 0; | |
2726 | } | |
6da0839a | 2727 | else if (ref->type == REF_ARRAY && ref->u.ar.type == AR_ELEMENT |
a0710c29 TB |
2728 | && e->expr_type == EXPR_VARIABLE) |
2729 | { | |
93302a24 | 2730 | if (ref->u.ar.as->type == AS_ASSUMED_SHAPE |
a0710c29 TB |
2731 | || e->symtree->n.sym->attr.pointer) |
2732 | { | |
2733 | elements = 1; | |
2734 | continue; | |
2735 | } | |
2736 | ||
2737 | /* Determine the number of remaining elements in the element | |
2738 | sequence for array element designators. */ | |
2739 | is_str_storage = true; | |
2740 | for (i = ref->u.ar.dimen - 1; i >= 0; i--) | |
2741 | { | |
2742 | if (ref->u.ar.start[i] == NULL | |
2743 | || ref->u.ar.start[i]->expr_type != EXPR_CONSTANT | |
2744 | || ref->u.ar.as->upper[i] == NULL | |
2745 | || ref->u.ar.as->lower[i] == NULL | |
2746 | || ref->u.ar.as->upper[i]->expr_type != EXPR_CONSTANT | |
2747 | || ref->u.ar.as->lower[i]->expr_type != EXPR_CONSTANT) | |
2748 | return 0; | |
2749 | ||
2750 | elements | |
2751 | = elements | |
2752 | * (mpz_get_si (ref->u.ar.as->upper[i]->value.integer) | |
2753 | - mpz_get_si (ref->u.ar.as->lower[i]->value.integer) | |
2754 | + 1L) | |
2755 | - (mpz_get_si (ref->u.ar.start[i]->value.integer) | |
2756 | - mpz_get_si (ref->u.ar.as->lower[i]->value.integer)); | |
2757 | } | |
2758 | } | |
3436db75 JW |
2759 | else if (ref->type == REF_COMPONENT && ref->u.c.component->attr.function |
2760 | && ref->u.c.component->attr.proc_pointer | |
2761 | && ref->u.c.component->attr.dimension) | |
2762 | { | |
2763 | /* Array-valued procedure-pointer components. */ | |
2764 | gfc_array_spec *as = ref->u.c.component->as; | |
2765 | for (i = 0; i < as->rank; i++) | |
2766 | { | |
2767 | if (!as->upper[i] || !as->lower[i] | |
2768 | || as->upper[i]->expr_type != EXPR_CONSTANT | |
2769 | || as->lower[i]->expr_type != EXPR_CONSTANT) | |
2770 | return 0; | |
2771 | ||
2772 | elements = elements | |
2773 | * (mpz_get_si (as->upper[i]->value.integer) | |
2774 | - mpz_get_si (as->lower[i]->value.integer) + 1L); | |
2775 | } | |
2776 | } | |
2d5b90b2 TB |
2777 | } |
2778 | ||
6da0839a | 2779 | if (substrlen) |
a0710c29 TB |
2780 | return (is_str_storage) ? substrlen + (elements-1)*strlen |
2781 | : elements*strlen; | |
2782 | else | |
2783 | return elements*strlen; | |
2d5b90b2 TB |
2784 | } |
2785 | ||
2786 | ||
59be8071 | 2787 | /* Given an expression, check whether it is an array section |
f3e1097b | 2788 | which has a vector subscript. */ |
59be8071 | 2789 | |
f3e1097b | 2790 | bool |
03af1e4c | 2791 | gfc_has_vector_subscript (gfc_expr *e) |
59be8071 TB |
2792 | { |
2793 | int i; | |
2794 | gfc_ref *ref; | |
2795 | ||
2796 | if (e == NULL || e->rank == 0 || e->expr_type != EXPR_VARIABLE) | |
f3e1097b | 2797 | return false; |
59be8071 TB |
2798 | |
2799 | for (ref = e->ref; ref; ref = ref->next) | |
2800 | if (ref->type == REF_ARRAY && ref->u.ar.type == AR_SECTION) | |
2801 | for (i = 0; i < ref->u.ar.dimen; i++) | |
2802 | if (ref->u.ar.dimen_type[i] == DIMEN_VECTOR) | |
f3e1097b | 2803 | return true; |
59be8071 | 2804 | |
f3e1097b | 2805 | return false; |
59be8071 TB |
2806 | } |
2807 | ||
2808 | ||
4294c093 JW |
2809 | static bool |
2810 | is_procptr_result (gfc_expr *expr) | |
2811 | { | |
2812 | gfc_component *c = gfc_get_proc_ptr_comp (expr); | |
2813 | if (c) | |
2814 | return (c->ts.interface && (c->ts.interface->attr.proc_pointer == 1)); | |
2815 | else | |
2816 | return ((expr->symtree->n.sym->result != expr->symtree->n.sym) | |
2817 | && (expr->symtree->n.sym->result->attr.proc_pointer == 1)); | |
2818 | } | |
2819 | ||
2820 | ||
bcc478b9 BRF |
2821 | /* Recursively append candidate argument ARG to CANDIDATES. Store the |
2822 | number of total candidates in CANDIDATES_LEN. */ | |
2823 | ||
2824 | static void | |
2825 | lookup_arg_fuzzy_find_candidates (gfc_formal_arglist *arg, | |
2826 | char **&candidates, | |
2827 | size_t &candidates_len) | |
2828 | { | |
2829 | for (gfc_formal_arglist *p = arg; p && p->sym; p = p->next) | |
2830 | vec_push (candidates, candidates_len, p->sym->name); | |
2831 | } | |
2832 | ||
2833 | ||
2834 | /* Lookup argument ARG fuzzily, taking names in ARGUMENTS into account. */ | |
2835 | ||
2836 | static const char* | |
2837 | lookup_arg_fuzzy (const char *arg, gfc_formal_arglist *arguments) | |
2838 | { | |
2839 | char **candidates = NULL; | |
2840 | size_t candidates_len = 0; | |
2841 | lookup_arg_fuzzy_find_candidates (arguments, candidates, candidates_len); | |
2842 | return gfc_closest_fuzzy_match (arg, candidates); | |
2843 | } | |
2844 | ||
2845 | ||
6de9cd9a DN |
2846 | /* Given formal and actual argument lists, see if they are compatible. |
2847 | If they are compatible, the actual argument list is sorted to | |
2848 | correspond with the formal list, and elements for missing optional | |
2849 | arguments are inserted. If WHERE pointer is nonnull, then we issue | |
2850 | errors when things don't match instead of just returning the status | |
2851 | code. */ | |
2852 | ||
f3e1097b | 2853 | static bool |
f0ac18b7 | 2854 | compare_actual_formal (gfc_actual_arglist **ap, gfc_formal_arglist *formal, |
f3883269 SK |
2855 | int ranks_must_agree, int is_elemental, |
2856 | bool in_statement_function, locus *where) | |
6de9cd9a | 2857 | { |
fab27f52 | 2858 | gfc_actual_arglist **new_arg, *a, *actual; |
6de9cd9a DN |
2859 | gfc_formal_arglist *f; |
2860 | int i, n, na; | |
2d5b90b2 | 2861 | unsigned long actual_size, formal_size; |
c49ea23d | 2862 | bool full_array = false; |
eb401400 | 2863 | gfc_array_ref *actual_arr_ref; |
6de9cd9a DN |
2864 | |
2865 | actual = *ap; | |
2866 | ||
2867 | if (actual == NULL && formal == NULL) | |
f3e1097b | 2868 | return true; |
6de9cd9a DN |
2869 | |
2870 | n = 0; | |
2871 | for (f = formal; f; f = f->next) | |
2872 | n++; | |
2873 | ||
1145e690 | 2874 | new_arg = XALLOCAVEC (gfc_actual_arglist *, n); |
6de9cd9a DN |
2875 | |
2876 | for (i = 0; i < n; i++) | |
7b901ac4 | 2877 | new_arg[i] = NULL; |
6de9cd9a DN |
2878 | |
2879 | na = 0; | |
2880 | f = formal; | |
2881 | i = 0; | |
2882 | ||
2883 | for (a = actual; a; a = a->next, f = f->next) | |
2884 | { | |
3453b6aa SK |
2885 | if (a->name != NULL && in_statement_function) |
2886 | { | |
2887 | gfc_error ("Keyword argument %qs at %L is invalid in " | |
2888 | "a statement function", a->name, &a->expr->where); | |
2889 | return false; | |
2890 | } | |
2891 | ||
7fcafa71 PT |
2892 | /* Look for keywords but ignore g77 extensions like %VAL. */ |
2893 | if (a->name != NULL && a->name[0] != '%') | |
6de9cd9a DN |
2894 | { |
2895 | i = 0; | |
2896 | for (f = formal; f; f = f->next, i++) | |
2897 | { | |
2898 | if (f->sym == NULL) | |
2899 | continue; | |
2900 | if (strcmp (f->sym->name, a->name) == 0) | |
2901 | break; | |
2902 | } | |
2903 | ||
2904 | if (f == NULL) | |
2905 | { | |
2906 | if (where) | |
bcc478b9 BRF |
2907 | { |
2908 | const char *guessed = lookup_arg_fuzzy (a->name, formal); | |
2909 | if (guessed) | |
2910 | gfc_error ("Keyword argument %qs at %L is not in " | |
2911 | "the procedure; did you mean %qs?", | |
2912 | a->name, &a->expr->where, guessed); | |
2913 | else | |
2914 | gfc_error ("Keyword argument %qs at %L is not in " | |
2915 | "the procedure", a->name, &a->expr->where); | |
2916 | } | |
f3e1097b | 2917 | return false; |
6de9cd9a DN |
2918 | } |
2919 | ||
7b901ac4 | 2920 | if (new_arg[i] != NULL) |
6de9cd9a DN |
2921 | { |
2922 | if (where) | |
c4100eae | 2923 | gfc_error ("Keyword argument %qs at %L is already associated " |
b251af97 SK |
2924 | "with another actual argument", a->name, |
2925 | &a->expr->where); | |
f3e1097b | 2926 | return false; |
6de9cd9a DN |
2927 | } |
2928 | } | |
2929 | ||
2930 | if (f == NULL) | |
2931 | { | |
2932 | if (where) | |
b251af97 SK |
2933 | gfc_error ("More actual than formal arguments in procedure " |
2934 | "call at %L", where); | |
6de9cd9a | 2935 | |
f3e1097b | 2936 | return false; |
6de9cd9a DN |
2937 | } |
2938 | ||
2939 | if (f->sym == NULL && a->expr == NULL) | |
2940 | goto match; | |
2941 | ||
2942 | if (f->sym == NULL) | |
2943 | { | |
04fa57cc TK |
2944 | /* These errors have to be issued, otherwise an ICE can occur. |
2945 | See PR 78865. */ | |
6de9cd9a | 2946 | if (where) |
04fa57cc TK |
2947 | gfc_error_now ("Missing alternate return specifier in subroutine " |
2948 | "call at %L", where); | |
f3e1097b | 2949 | return false; |
6de9cd9a DN |
2950 | } |
2951 | ||
2952 | if (a->expr == NULL) | |
2953 | { | |
2954 | if (where) | |
04fa57cc TK |
2955 | gfc_error_now ("Unexpected alternate return specifier in " |
2956 | "subroutine call at %L", where); | |
f3e1097b | 2957 | return false; |
6de9cd9a | 2958 | } |
08857b61 | 2959 | |
8b704316 PT |
2960 | /* Make sure that intrinsic vtables exist for calls to unlimited |
2961 | polymorphic formal arguments. */ | |
524af0d6 | 2962 | if (UNLIMITED_POLY (f->sym) |
8b704316 PT |
2963 | && a->expr->ts.type != BT_DERIVED |
2964 | && a->expr->ts.type != BT_CLASS) | |
7289d1c9 | 2965 | gfc_find_vtab (&a->expr->ts); |
8b704316 | 2966 | |
99091b70 TB |
2967 | if (a->expr->expr_type == EXPR_NULL |
2968 | && ((f->sym->ts.type != BT_CLASS && !f->sym->attr.pointer | |
2969 | && (f->sym->attr.allocatable || !f->sym->attr.optional | |
2970 | || (gfc_option.allow_std & GFC_STD_F2008) == 0)) | |
2971 | || (f->sym->ts.type == BT_CLASS | |
2972 | && !CLASS_DATA (f->sym)->attr.class_pointer | |
2973 | && (CLASS_DATA (f->sym)->attr.allocatable | |
2974 | || !f->sym->attr.optional | |
2975 | || (gfc_option.allow_std & GFC_STD_F2008) == 0)))) | |
08857b61 | 2976 | { |
99091b70 TB |
2977 | if (where |
2978 | && (!f->sym->attr.optional | |
2979 | || (f->sym->ts.type != BT_CLASS && f->sym->attr.allocatable) | |
2980 | || (f->sym->ts.type == BT_CLASS | |
2981 | && CLASS_DATA (f->sym)->attr.allocatable))) | |
c4100eae | 2982 | gfc_error ("Unexpected NULL() intrinsic at %L to dummy %qs", |
08857b61 TB |
2983 | where, f->sym->name); |
2984 | else if (where) | |
2985 | gfc_error ("Fortran 2008: Null pointer at %L to non-pointer " | |
c4100eae | 2986 | "dummy %qs", where, f->sym->name); |
08857b61 | 2987 | |
f3e1097b | 2988 | return false; |
08857b61 | 2989 | } |
8b704316 | 2990 | |
5ad6345e TB |
2991 | if (!compare_parameter (f->sym, a->expr, ranks_must_agree, |
2992 | is_elemental, where)) | |
f3e1097b | 2993 | return false; |
6de9cd9a | 2994 | |
45a69325 TB |
2995 | /* TS 29113, 6.3p2. */ |
2996 | if (f->sym->ts.type == BT_ASSUMED | |
2997 | && (a->expr->ts.type == BT_DERIVED | |
2998 | || (a->expr->ts.type == BT_CLASS && CLASS_DATA (a->expr)))) | |
2999 | { | |
3000 | gfc_namespace *f2k_derived; | |
3001 | ||
3002 | f2k_derived = a->expr->ts.type == BT_DERIVED | |
3003 | ? a->expr->ts.u.derived->f2k_derived | |
3004 | : CLASS_DATA (a->expr)->ts.u.derived->f2k_derived; | |
3005 | ||
3006 | if (f2k_derived | |
3007 | && (f2k_derived->finalizers || f2k_derived->tb_sym_root)) | |
3008 | { | |
3009 | gfc_error ("Actual argument at %L to assumed-type dummy is of " | |
3010 | "derived type with type-bound or FINAL procedures", | |
3011 | &a->expr->where); | |
524af0d6 | 3012 | return false; |
45a69325 TB |
3013 | } |
3014 | } | |
3015 | ||
a0710c29 TB |
3016 | /* Special case for character arguments. For allocatable, pointer |
3017 | and assumed-shape dummies, the string length needs to match | |
3018 | exactly. */ | |
2d5b90b2 | 3019 | if (a->expr->ts.type == BT_CHARACTER |
eb401400 AV |
3020 | && a->expr->ts.u.cl && a->expr->ts.u.cl->length |
3021 | && a->expr->ts.u.cl->length->expr_type == EXPR_CONSTANT | |
3022 | && f->sym->ts.type == BT_CHARACTER && f->sym->ts.u.cl | |
3023 | && f->sym->ts.u.cl->length | |
3024 | && f->sym->ts.u.cl->length->expr_type == EXPR_CONSTANT | |
3025 | && (f->sym->attr.pointer || f->sym->attr.allocatable | |
3026 | || (f->sym->as && f->sym->as->type == AS_ASSUMED_SHAPE)) | |
3027 | && (mpz_cmp (a->expr->ts.u.cl->length->value.integer, | |
3028 | f->sym->ts.u.cl->length->value.integer) != 0)) | |
3029 | { | |
3030 | if (where && (f->sym->attr.pointer || f->sym->attr.allocatable)) | |
3031 | gfc_warning (OPT_Wargument_mismatch, | |
3032 | "Character length mismatch (%ld/%ld) between actual " | |
3033 | "argument and pointer or allocatable dummy argument " | |
3034 | "%qs at %L", | |
3035 | mpz_get_si (a->expr->ts.u.cl->length->value.integer), | |
3036 | mpz_get_si (f->sym->ts.u.cl->length->value.integer), | |
3037 | f->sym->name, &a->expr->where); | |
3038 | else if (where) | |
3039 | gfc_warning (OPT_Wargument_mismatch, | |
3040 | "Character length mismatch (%ld/%ld) between actual " | |
3041 | "argument and assumed-shape dummy argument %qs " | |
3042 | "at %L", | |
3043 | mpz_get_si (a->expr->ts.u.cl->length->value.integer), | |
3044 | mpz_get_si (f->sym->ts.u.cl->length->value.integer), | |
3045 | f->sym->name, &a->expr->where); | |
f3e1097b | 3046 | return false; |
eb401400 | 3047 | } |
a0324f7b | 3048 | |
8d51f26f | 3049 | if ((f->sym->attr.pointer || f->sym->attr.allocatable) |
eb401400 AV |
3050 | && f->sym->ts.deferred != a->expr->ts.deferred |
3051 | && a->expr->ts.type == BT_CHARACTER) | |
8d51f26f PT |
3052 | { |
3053 | if (where) | |
0c133211 | 3054 | gfc_error ("Actual argument at %L to allocatable or " |
c4100eae | 3055 | "pointer dummy argument %qs must have a deferred " |
8d51f26f PT |
3056 | "length type parameter if and only if the dummy has one", |
3057 | &a->expr->where, f->sym->name); | |
f3e1097b | 3058 | return false; |
8d51f26f PT |
3059 | } |
3060 | ||
c49ea23d PT |
3061 | if (f->sym->ts.type == BT_CLASS) |
3062 | goto skip_size_check; | |
3063 | ||
37639728 TB |
3064 | actual_size = get_expr_storage_size (a->expr); |
3065 | formal_size = get_sym_storage_size (f->sym); | |
93302a24 JW |
3066 | if (actual_size != 0 && actual_size < formal_size |
3067 | && a->expr->ts.type != BT_PROCEDURE | |
3068 | && f->sym->attr.flavor != FL_PROCEDURE) | |
2d5b90b2 TB |
3069 | { |
3070 | if (a->expr->ts.type == BT_CHARACTER && !f->sym->as && where) | |
3df19fa0 FR |
3071 | gfc_warning (OPT_Wargument_mismatch, |
3072 | "Character length of actual argument shorter " | |
48749dbc | 3073 | "than of dummy argument %qs (%lu/%lu) at %L", |
8d51f26f PT |
3074 | f->sym->name, actual_size, formal_size, |
3075 | &a->expr->where); | |
2d5b90b2 | 3076 | else if (where) |
37d92a7e DH |
3077 | { |
3078 | /* Emit a warning for -std=legacy and an error otherwise. */ | |
3079 | if (gfc_option.warn_std == 0) | |
3080 | gfc_warning (OPT_Wargument_mismatch, | |
3081 | "Actual argument contains too few " | |
3082 | "elements for dummy argument %qs (%lu/%lu) " | |
3083 | "at %L", f->sym->name, actual_size, | |
3084 | formal_size, &a->expr->where); | |
3085 | else | |
3086 | gfc_error_now ("Actual argument contains too few " | |
3087 | "elements for dummy argument %qs (%lu/%lu) " | |
3088 | "at %L", f->sym->name, actual_size, | |
3089 | formal_size, &a->expr->where); | |
3090 | } | |
f3e1097b | 3091 | return false; |
2d5b90b2 TB |
3092 | } |
3093 | ||
c49ea23d PT |
3094 | skip_size_check: |
3095 | ||
e9355cc3 JW |
3096 | /* Satisfy F03:12.4.1.3 by ensuring that a procedure pointer actual |
3097 | argument is provided for a procedure pointer formal argument. */ | |
8fb74da4 | 3098 | if (f->sym->attr.proc_pointer |
a7c0b11d | 3099 | && !((a->expr->expr_type == EXPR_VARIABLE |
4294c093 JW |
3100 | && (a->expr->symtree->n.sym->attr.proc_pointer |
3101 | || gfc_is_proc_ptr_comp (a->expr))) | |
a7c0b11d | 3102 | || (a->expr->expr_type == EXPR_FUNCTION |
4294c093 | 3103 | && is_procptr_result (a->expr)))) |
8fb74da4 JW |
3104 | { |
3105 | if (where) | |
c4100eae | 3106 | gfc_error ("Expected a procedure pointer for argument %qs at %L", |
8fb74da4 | 3107 | f->sym->name, &a->expr->where); |
f3e1097b | 3108 | return false; |
8fb74da4 JW |
3109 | } |
3110 | ||
e9355cc3 | 3111 | /* Satisfy F03:12.4.1.3 by ensuring that a procedure actual argument is |
699fa7aa | 3112 | provided for a procedure formal argument. */ |
e9355cc3 | 3113 | if (f->sym->attr.flavor == FL_PROCEDURE |
4294c093 JW |
3114 | && !((a->expr->expr_type == EXPR_VARIABLE |
3115 | && (a->expr->symtree->n.sym->attr.flavor == FL_PROCEDURE | |
3116 | || a->expr->symtree->n.sym->attr.proc_pointer | |
3117 | || gfc_is_proc_ptr_comp (a->expr))) | |
3118 | || (a->expr->expr_type == EXPR_FUNCTION | |
3119 | && is_procptr_result (a->expr)))) | |
699fa7aa | 3120 | { |
9914f8cf | 3121 | if (where) |
c4100eae | 3122 | gfc_error ("Expected a procedure for argument %qs at %L", |
9914f8cf | 3123 | f->sym->name, &a->expr->where); |
f3e1097b | 3124 | return false; |
699fa7aa PT |
3125 | } |
3126 | ||
b251af97 | 3127 | if (f->sym->as && f->sym->as->type == AS_ASSUMED_SHAPE |
bf9d2177 JJ |
3128 | && a->expr->expr_type == EXPR_VARIABLE |
3129 | && a->expr->symtree->n.sym->as | |
3130 | && a->expr->symtree->n.sym->as->type == AS_ASSUMED_SIZE | |
3131 | && (a->expr->ref == NULL | |
3132 | || (a->expr->ref->type == REF_ARRAY | |
3133 | && a->expr->ref->u.ar.type == AR_FULL))) | |
3134 | { | |
3135 | if (where) | |
c4100eae | 3136 | gfc_error ("Actual argument for %qs cannot be an assumed-size" |
bf9d2177 | 3137 | " array at %L", f->sym->name, where); |
f3e1097b | 3138 | return false; |
bf9d2177 JJ |
3139 | } |
3140 | ||
1600fe22 TS |
3141 | if (a->expr->expr_type != EXPR_NULL |
3142 | && compare_pointer (f->sym, a->expr) == 0) | |
6de9cd9a DN |
3143 | { |
3144 | if (where) | |
c4100eae | 3145 | gfc_error ("Actual argument for %qs must be a pointer at %L", |
6de9cd9a | 3146 | f->sym->name, &a->expr->where); |
f3e1097b | 3147 | return false; |
6de9cd9a DN |
3148 | } |
3149 | ||
7d54ef80 TB |
3150 | if (a->expr->expr_type != EXPR_NULL |
3151 | && (gfc_option.allow_std & GFC_STD_F2008) == 0 | |
3152 | && compare_pointer (f->sym, a->expr) == 2) | |
3153 | { | |
3154 | if (where) | |
3155 | gfc_error ("Fortran 2008: Non-pointer actual argument at %L to " | |
c4100eae | 3156 | "pointer dummy %qs", &a->expr->where,f->sym->name); |
f3e1097b | 3157 | return false; |
7d54ef80 | 3158 | } |
8b704316 | 3159 | |
7d54ef80 | 3160 | |
d3a9eea2 TB |
3161 | /* Fortran 2008, C1242. */ |
3162 | if (f->sym->attr.pointer && gfc_is_coindexed (a->expr)) | |
3163 | { | |
3164 | if (where) | |
3165 | gfc_error ("Coindexed actual argument at %L to pointer " | |
c4100eae | 3166 | "dummy %qs", |
d3a9eea2 | 3167 | &a->expr->where, f->sym->name); |
f3e1097b | 3168 | return false; |
d3a9eea2 TB |
3169 | } |
3170 | ||
3171 | /* Fortran 2008, 12.5.2.5 (no constraint). */ | |
3172 | if (a->expr->expr_type == EXPR_VARIABLE | |
3173 | && f->sym->attr.intent != INTENT_IN | |
3174 | && f->sym->attr.allocatable | |
3175 | && gfc_is_coindexed (a->expr)) | |
3176 | { | |
3177 | if (where) | |
3178 | gfc_error ("Coindexed actual argument at %L to allocatable " | |
c4100eae | 3179 | "dummy %qs requires INTENT(IN)", |
d3a9eea2 | 3180 | &a->expr->where, f->sym->name); |
f3e1097b | 3181 | return false; |
d3a9eea2 TB |
3182 | } |
3183 | ||
3184 | /* Fortran 2008, C1237. */ | |
3185 | if (a->expr->expr_type == EXPR_VARIABLE | |
3186 | && (f->sym->attr.asynchronous || f->sym->attr.volatile_) | |
3187 | && gfc_is_coindexed (a->expr) | |
3188 | && (a->expr->symtree->n.sym->attr.volatile_ | |
3189 | || a->expr->symtree->n.sym->attr.asynchronous)) | |
3190 | { | |
3191 | if (where) | |
3192 | gfc_error ("Coindexed ASYNCHRONOUS or VOLATILE actual argument at " | |
c4100eae | 3193 | "%L requires that dummy %qs has neither " |
d3a9eea2 TB |
3194 | "ASYNCHRONOUS nor VOLATILE", &a->expr->where, |
3195 | f->sym->name); | |
f3e1097b | 3196 | return false; |
d3a9eea2 TB |
3197 | } |
3198 | ||
3199 | /* Fortran 2008, 12.5.2.4 (no constraint). */ | |
3200 | if (a->expr->expr_type == EXPR_VARIABLE | |
3201 | && f->sym->attr.intent != INTENT_IN && !f->sym->attr.value | |
3202 | && gfc_is_coindexed (a->expr) | |
3203 | && gfc_has_ultimate_allocatable (a->expr)) | |
3204 | { | |
3205 | if (where) | |
3206 | gfc_error ("Coindexed actual argument at %L with allocatable " | |
c4100eae | 3207 | "ultimate component to dummy %qs requires either VALUE " |
d3a9eea2 | 3208 | "or INTENT(IN)", &a->expr->where, f->sym->name); |
f3e1097b | 3209 | return false; |
d3a9eea2 TB |
3210 | } |
3211 | ||
c49ea23d PT |
3212 | if (f->sym->ts.type == BT_CLASS |
3213 | && CLASS_DATA (f->sym)->attr.allocatable | |
3214 | && gfc_is_class_array_ref (a->expr, &full_array) | |
3215 | && !full_array) | |
3216 | { | |
3217 | if (where) | |
c4100eae | 3218 | gfc_error ("Actual CLASS array argument for %qs must be a full " |
c49ea23d | 3219 | "array at %L", f->sym->name, &a->expr->where); |
f3e1097b | 3220 | return false; |
c49ea23d PT |
3221 | } |
3222 | ||
3223 | ||
aa08038d | 3224 | if (a->expr->expr_type != EXPR_NULL |
f3e1097b | 3225 | && !compare_allocatable (f->sym, a->expr)) |
aa08038d EE |
3226 | { |
3227 | if (where) | |
c4100eae | 3228 | gfc_error ("Actual argument for %qs must be ALLOCATABLE at %L", |
aa08038d | 3229 | f->sym->name, &a->expr->where); |
f3e1097b | 3230 | return false; |
aa08038d EE |
3231 | } |
3232 | ||
a920e94a | 3233 | /* Check intent = OUT/INOUT for definable actual argument. */ |
f3883269 SK |
3234 | if (!in_statement_function |
3235 | && (f->sym->attr.intent == INTENT_OUT | |
3236 | || f->sym->attr.intent == INTENT_INOUT)) | |
a920e94a | 3237 | { |
8c91ab34 DK |
3238 | const char* context = (where |
3239 | ? _("actual argument to INTENT = OUT/INOUT") | |
3240 | : NULL); | |
a920e94a | 3241 | |
bcb4ad36 TB |
3242 | if (((f->sym->ts.type == BT_CLASS && f->sym->attr.class_ok |
3243 | && CLASS_DATA (f->sym)->attr.class_pointer) | |
3244 | || (f->sym->ts.type != BT_CLASS && f->sym->attr.pointer)) | |
524af0d6 | 3245 | && !gfc_check_vardef_context (a->expr, true, false, false, context)) |
f3e1097b | 3246 | return false; |
524af0d6 | 3247 | if (!gfc_check_vardef_context (a->expr, false, false, false, context)) |
f3e1097b | 3248 | return false; |
ee7e677f TB |
3249 | } |
3250 | ||
59be8071 TB |
3251 | if ((f->sym->attr.intent == INTENT_OUT |
3252 | || f->sym->attr.intent == INTENT_INOUT | |
84efddb2 DF |
3253 | || f->sym->attr.volatile_ |
3254 | || f->sym->attr.asynchronous) | |
03af1e4c | 3255 | && gfc_has_vector_subscript (a->expr)) |
59be8071 TB |
3256 | { |
3257 | if (where) | |
84efddb2 DF |
3258 | gfc_error ("Array-section actual argument with vector " |
3259 | "subscripts at %L is incompatible with INTENT(OUT), " | |
3260 | "INTENT(INOUT), VOLATILE or ASYNCHRONOUS attribute " | |
c4100eae | 3261 | "of the dummy argument %qs", |
59be8071 | 3262 | &a->expr->where, f->sym->name); |
f3e1097b | 3263 | return false; |
59be8071 TB |
3264 | } |
3265 | ||
9bce3c1c TB |
3266 | /* C1232 (R1221) For an actual argument which is an array section or |
3267 | an assumed-shape array, the dummy argument shall be an assumed- | |
3268 | shape array, if the dummy argument has the VOLATILE attribute. */ | |
3269 | ||
3270 | if (f->sym->attr.volatile_ | |
271dd55c | 3271 | && a->expr->expr_type == EXPR_VARIABLE |
9bce3c1c TB |
3272 | && a->expr->symtree->n.sym->as |
3273 | && a->expr->symtree->n.sym->as->type == AS_ASSUMED_SHAPE | |
3274 | && !(f->sym->as && f->sym->as->type == AS_ASSUMED_SHAPE)) | |
3275 | { | |
3276 | if (where) | |
3277 | gfc_error ("Assumed-shape actual argument at %L is " | |
3278 | "incompatible with the non-assumed-shape " | |
c4100eae | 3279 | "dummy argument %qs due to VOLATILE attribute", |
9bce3c1c | 3280 | &a->expr->where,f->sym->name); |
f3e1097b | 3281 | return false; |
9bce3c1c TB |
3282 | } |
3283 | ||
eb401400 AV |
3284 | /* Find the last array_ref. */ |
3285 | actual_arr_ref = NULL; | |
3286 | if (a->expr->ref) | |
3287 | actual_arr_ref = gfc_find_array_ref (a->expr, true); | |
3288 | ||
9bce3c1c | 3289 | if (f->sym->attr.volatile_ |
eb401400 | 3290 | && actual_arr_ref && actual_arr_ref->type == AR_SECTION |
9bce3c1c TB |
3291 | && !(f->sym->as && f->sym->as->type == AS_ASSUMED_SHAPE)) |
3292 | { | |
3293 | if (where) | |
3294 | gfc_error ("Array-section actual argument at %L is " | |
3295 | "incompatible with the non-assumed-shape " | |
c4100eae | 3296 | "dummy argument %qs due to VOLATILE attribute", |
eb401400 | 3297 | &a->expr->where, f->sym->name); |
f3e1097b | 3298 | return false; |
9bce3c1c TB |
3299 | } |
3300 | ||
3301 | /* C1233 (R1221) For an actual argument which is a pointer array, the | |
3302 | dummy argument shall be an assumed-shape or pointer array, if the | |
3303 | dummy argument has the VOLATILE attribute. */ | |
3304 | ||
3305 | if (f->sym->attr.volatile_ | |
271dd55c | 3306 | && a->expr->expr_type == EXPR_VARIABLE |
9bce3c1c TB |
3307 | && a->expr->symtree->n.sym->attr.pointer |
3308 | && a->expr->symtree->n.sym->as | |
3309 | && !(f->sym->as | |
3310 | && (f->sym->as->type == AS_ASSUMED_SHAPE | |
3311 | || f->sym->attr.pointer))) | |
3312 | { | |
3313 | if (where) | |
3314 | gfc_error ("Pointer-array actual argument at %L requires " | |
3315 | "an assumed-shape or pointer-array dummy " | |
c4100eae | 3316 | "argument %qs due to VOLATILE attribute", |
9bce3c1c | 3317 | &a->expr->where,f->sym->name); |
f3e1097b | 3318 | return false; |
9bce3c1c TB |
3319 | } |
3320 | ||
6de9cd9a DN |
3321 | match: |
3322 | if (a == actual) | |
3323 | na = i; | |
3324 | ||
7b901ac4 | 3325 | new_arg[i++] = a; |
6de9cd9a DN |
3326 | } |
3327 | ||
3328 | /* Make sure missing actual arguments are optional. */ | |
3329 | i = 0; | |
3330 | for (f = formal; f; f = f->next, i++) | |
3331 | { | |
7b901ac4 | 3332 | if (new_arg[i] != NULL) |
6de9cd9a | 3333 | continue; |
3ab7b3de BM |
3334 | if (f->sym == NULL) |
3335 | { | |
3336 | if (where) | |
b251af97 SK |
3337 | gfc_error ("Missing alternate return spec in subroutine call " |
3338 | "at %L", where); | |
f3e1097b | 3339 | return false; |
3ab7b3de | 3340 | } |
f3883269 SK |
3341 | if (!f->sym->attr.optional |
3342 | || (in_statement_function && f->sym->attr.optional)) | |
6de9cd9a DN |
3343 | { |
3344 | if (where) | |
c4100eae | 3345 | gfc_error ("Missing actual argument for argument %qs at %L", |
6de9cd9a | 3346 | f->sym->name, where); |
f3e1097b | 3347 | return false; |
6de9cd9a DN |
3348 | } |
3349 | } | |
3350 | ||
3351 | /* The argument lists are compatible. We now relink a new actual | |
3352 | argument list with null arguments in the right places. The head | |
3353 | of the list remains the head. */ | |
3354 | for (i = 0; i < n; i++) | |
7b901ac4 KG |
3355 | if (new_arg[i] == NULL) |
3356 | new_arg[i] = gfc_get_actual_arglist (); | |
6de9cd9a DN |
3357 | |
3358 | if (na != 0) | |
3359 | { | |
fab27f52 MM |
3360 | std::swap (*new_arg[0], *actual); |
3361 | std::swap (new_arg[0], new_arg[na]); | |
6de9cd9a DN |
3362 | } |
3363 | ||
3364 | for (i = 0; i < n - 1; i++) | |
7b901ac4 | 3365 | new_arg[i]->next = new_arg[i + 1]; |
6de9cd9a | 3366 | |
7b901ac4 | 3367 | new_arg[i]->next = NULL; |
6de9cd9a DN |
3368 | |
3369 | if (*ap == NULL && n > 0) | |
7b901ac4 | 3370 | *ap = new_arg[0]; |
6de9cd9a | 3371 | |
1600fe22 | 3372 | /* Note the types of omitted optional arguments. */ |
b5ca4fd2 | 3373 | for (a = *ap, f = formal; a; a = a->next, f = f->next) |
1600fe22 TS |
3374 | if (a->expr == NULL && a->label == NULL) |
3375 | a->missing_arg_type = f->sym->ts.type; | |
3376 | ||
f3e1097b | 3377 | return true; |
6de9cd9a DN |
3378 | } |
3379 | ||
3380 | ||
3381 | typedef struct | |
3382 | { | |
3383 | gfc_formal_arglist *f; | |
3384 | gfc_actual_arglist *a; | |
3385 | } | |
3386 | argpair; | |
3387 | ||
3388 | /* qsort comparison function for argument pairs, with the following | |
3389 | order: | |
3390 | - p->a->expr == NULL | |
3391 | - p->a->expr->expr_type != EXPR_VARIABLE | |
c5014982 | 3392 | - by gfc_symbol pointer value (larger first). */ |
6de9cd9a DN |
3393 | |
3394 | static int | |
3395 | pair_cmp (const void *p1, const void *p2) | |
3396 | { | |
3397 | const gfc_actual_arglist *a1, *a2; | |
3398 | ||
3399 | /* *p1 and *p2 are elements of the to-be-sorted array. */ | |
3400 | a1 = ((const argpair *) p1)->a; | |
3401 | a2 = ((const argpair *) p2)->a; | |
3402 | if (!a1->expr) | |
3403 | { | |
3404 | if (!a2->expr) | |
3405 | return 0; | |
3406 | return -1; | |
3407 | } | |
3408 | if (!a2->expr) | |
3409 | return 1; | |
3410 | if (a1->expr->expr_type != EXPR_VARIABLE) | |
3411 | { | |
3412 | if (a2->expr->expr_type != EXPR_VARIABLE) | |
3413 | return 0; | |
3414 | return -1; | |
3415 | } | |
3416 | if (a2->expr->expr_type != EXPR_VARIABLE) | |
3417 | return 1; | |
c5014982 AM |
3418 | if (a1->expr->symtree->n.sym > a2->expr->symtree->n.sym) |
3419 | return -1; | |
6de9cd9a DN |
3420 | return a1->expr->symtree->n.sym < a2->expr->symtree->n.sym; |
3421 | } | |
3422 | ||
3423 | ||
3424 | /* Given two expressions from some actual arguments, test whether they | |
3425 | refer to the same expression. The analysis is conservative. | |
524af0d6 | 3426 | Returning false will produce no warning. */ |
6de9cd9a | 3427 | |
524af0d6 | 3428 | static bool |
b251af97 | 3429 | compare_actual_expr (gfc_expr *e1, gfc_expr *e2) |
6de9cd9a DN |
3430 | { |
3431 | const gfc_ref *r1, *r2; | |
3432 | ||
3433 | if (!e1 || !e2 | |
3434 | || e1->expr_type != EXPR_VARIABLE | |
3435 | || e2->expr_type != EXPR_VARIABLE | |
3436 | || e1->symtree->n.sym != e2->symtree->n.sym) | |
524af0d6 | 3437 | return false; |
6de9cd9a DN |
3438 | |
3439 | /* TODO: improve comparison, see expr.c:show_ref(). */ | |
3440 | for (r1 = e1->ref, r2 = e2->ref; r1 && r2; r1 = r1->next, r2 = r2->next) | |
3441 | { | |
3442 | if (r1->type != r2->type) | |
524af0d6 | 3443 | return false; |
6de9cd9a DN |
3444 | switch (r1->type) |
3445 | { | |
3446 | case REF_ARRAY: | |
3447 | if (r1->u.ar.type != r2->u.ar.type) | |
524af0d6 | 3448 | return false; |
6de9cd9a DN |
3449 | /* TODO: At the moment, consider only full arrays; |
3450 | we could do better. */ | |
3451 | if (r1->u.ar.type != AR_FULL || r2->u.ar.type != AR_FULL) | |
524af0d6 | 3452 | return false; |
6de9cd9a DN |
3453 | break; |
3454 | ||
3455 | case REF_COMPONENT: | |
3456 | if (r1->u.c.component != r2->u.c.component) | |
524af0d6 | 3457 | return false; |
6de9cd9a DN |
3458 | break; |
3459 | ||
3460 | case REF_SUBSTRING: | |
524af0d6 | 3461 | return false; |
6de9cd9a DN |
3462 | |
3463 | default: | |
3464 | gfc_internal_error ("compare_actual_expr(): Bad component code"); | |
3465 | } | |
3466 | } | |
3467 | if (!r1 && !r2) | |
524af0d6 JB |
3468 | return true; |
3469 | return false; | |
6de9cd9a DN |
3470 | } |
3471 | ||
b251af97 | 3472 | |
6de9cd9a DN |
3473 | /* Given formal and actual argument lists that correspond to one |
3474 | another, check that identical actual arguments aren't not | |
3475 | associated with some incompatible INTENTs. */ | |
3476 | ||
524af0d6 | 3477 | static bool |
b251af97 | 3478 | check_some_aliasing (gfc_formal_arglist *f, gfc_actual_arglist *a) |
6de9cd9a DN |
3479 | { |
3480 | sym_intent f1_intent, f2_intent; | |
3481 | gfc_formal_arglist *f1; | |
3482 | gfc_actual_arglist *a1; | |
3483 | size_t n, i, j; | |
3484 | argpair *p; | |
524af0d6 | 3485 | bool t = true; |
6de9cd9a DN |
3486 | |
3487 | n = 0; | |
3488 | for (f1 = f, a1 = a;; f1 = f1->next, a1 = a1->next) | |
3489 | { | |
3490 | if (f1 == NULL && a1 == NULL) | |
3491 | break; | |
3492 | if (f1 == NULL || a1 == NULL) | |
3493 | gfc_internal_error ("check_some_aliasing(): List mismatch"); | |
3494 | n++; | |
3495 | } | |
3496 | if (n == 0) | |
3497 | return t; | |
1145e690 | 3498 | p = XALLOCAVEC (argpair, n); |
6de9cd9a DN |
3499 | |
3500 | for (i = 0, f1 = f, a1 = a; i < n; i++, f1 = f1->next, a1 = a1->next) | |
3501 | { | |
3502 | p[i].f = f1; | |
3503 | p[i].a = a1; | |
3504 | } | |
3505 | ||
3506 | qsort (p, n, sizeof (argpair), pair_cmp); | |
3507 | ||
3508 | for (i = 0; i < n; i++) | |
3509 | { | |
3510 | if (!p[i].a->expr | |
3511 | || p[i].a->expr->expr_type != EXPR_VARIABLE | |
3512 | || p[i].a->expr->ts.type == BT_PROCEDURE) | |
3513 | continue; | |
3514 | f1_intent = p[i].f->sym->attr.intent; | |
3515 | for (j = i + 1; j < n; j++) | |
3516 | { | |
3517 | /* Expected order after the sort. */ | |
3518 | if (!p[j].a->expr || p[j].a->expr->expr_type != EXPR_VARIABLE) | |
3519 | gfc_internal_error ("check_some_aliasing(): corrupted data"); | |
3520 | ||
3521 | /* Are the expression the same? */ | |
524af0d6 | 3522 | if (!compare_actual_expr (p[i].a->expr, p[j].a->expr)) |
6de9cd9a DN |
3523 | break; |
3524 | f2_intent = p[j].f->sym->attr.intent; | |
3525 | if ((f1_intent == INTENT_IN && f2_intent == INTENT_OUT) | |
9f1930be TB |
3526 | || (f1_intent == INTENT_OUT && f2_intent == INTENT_IN) |
3527 | || (f1_intent == INTENT_OUT && f2_intent == INTENT_OUT)) | |
6de9cd9a | 3528 | { |
db30e21c | 3529 | gfc_warning (0, "Same actual argument associated with INTENT(%s) " |
48749dbc | 3530 | "argument %qs and INTENT(%s) argument %qs at %L", |
6de9cd9a DN |
3531 | gfc_intent_string (f1_intent), p[i].f->sym->name, |
3532 | gfc_intent_string (f2_intent), p[j].f->sym->name, | |
3533 | &p[i].a->expr->where); | |
524af0d6 | 3534 | t = false; |
6de9cd9a DN |
3535 | } |
3536 | } | |
3537 | } | |
3538 | ||
3539 | return t; | |
3540 | } | |
3541 | ||
3542 | ||
3543 | /* Given formal and actual argument lists that correspond to one | |
3544 | another, check that they are compatible in the sense that intents | |
3545 | are not mismatched. */ | |
3546 | ||
524af0d6 | 3547 | static bool |
b251af97 | 3548 | check_intents (gfc_formal_arglist *f, gfc_actual_arglist *a) |
6de9cd9a | 3549 | { |
f17facac | 3550 | sym_intent f_intent; |
6de9cd9a DN |
3551 | |
3552 | for (;; f = f->next, a = a->next) | |
3553 | { | |
99c39534 TB |
3554 | gfc_expr *expr; |
3555 | ||
6de9cd9a DN |
3556 | if (f == NULL && a == NULL) |
3557 | break; | |
3558 | if (f == NULL || a == NULL) | |
3559 | gfc_internal_error ("check_intents(): List mismatch"); | |
3560 | ||
99c39534 TB |
3561 | if (a->expr && a->expr->expr_type == EXPR_FUNCTION |
3562 | && a->expr->value.function.isym | |
3563 | && a->expr->value.function.isym->id == GFC_ISYM_CAF_GET) | |
3564 | expr = a->expr->value.function.actual->expr; | |
3565 | else | |
3566 | expr = a->expr; | |
3567 | ||
3568 | if (expr == NULL || expr->expr_type != EXPR_VARIABLE) | |
6de9cd9a DN |
3569 | continue; |
3570 | ||
6de9cd9a DN |
3571 | f_intent = f->sym->attr.intent; |
3572 | ||
99c39534 | 3573 | if (gfc_pure (NULL) && gfc_impure_variable (expr->symtree->n.sym)) |
6de9cd9a | 3574 | { |
bcb4ad36 TB |
3575 | if ((f->sym->ts.type == BT_CLASS && f->sym->attr.class_ok |
3576 | && CLASS_DATA (f->sym)->attr.class_pointer) | |
3577 | || (f->sym->ts.type != BT_CLASS && f->sym->attr.pointer)) | |
6de9cd9a | 3578 | { |
b251af97 SK |
3579 | gfc_error ("Procedure argument at %L is local to a PURE " |
3580 | "procedure and has the POINTER attribute", | |
99c39534 | 3581 | &expr->where); |
524af0d6 | 3582 | return false; |
6de9cd9a DN |
3583 | } |
3584 | } | |
d3a9eea2 TB |
3585 | |
3586 | /* Fortran 2008, C1283. */ | |
99c39534 | 3587 | if (gfc_pure (NULL) && gfc_is_coindexed (expr)) |
d3a9eea2 TB |
3588 | { |
3589 | if (f_intent == INTENT_INOUT || f_intent == INTENT_OUT) | |
3590 | { | |
3591 | gfc_error ("Coindexed actual argument at %L in PURE procedure " | |
3592 | "is passed to an INTENT(%s) argument", | |
99c39534 | 3593 | &expr->where, gfc_intent_string (f_intent)); |
524af0d6 | 3594 | return false; |
d3a9eea2 TB |
3595 | } |
3596 | ||
bcb4ad36 TB |
3597 | if ((f->sym->ts.type == BT_CLASS && f->sym->attr.class_ok |
3598 | && CLASS_DATA (f->sym)->attr.class_pointer) | |
3599 | || (f->sym->ts.type != BT_CLASS && f->sym->attr.pointer)) | |
d3a9eea2 TB |
3600 | { |
3601 | gfc_error ("Coindexed actual argument at %L in PURE procedure " | |
3602 | "is passed to a POINTER dummy argument", | |
99c39534 | 3603 | &expr->where); |
524af0d6 | 3604 | return false; |
d3a9eea2 TB |
3605 | } |
3606 | } | |
3607 | ||
3608 | /* F2008, Section 12.5.2.4. */ | |
99c39534 TB |
3609 | if (expr->ts.type == BT_CLASS && f->sym->ts.type == BT_CLASS |
3610 | && gfc_is_coindexed (expr)) | |
d3a9eea2 TB |
3611 | { |
3612 | gfc_error ("Coindexed polymorphic actual argument at %L is passed " | |
c4100eae | 3613 | "polymorphic dummy argument %qs", |
99c39534 | 3614 | &expr->where, f->sym->name); |
524af0d6 | 3615 | return false; |
d3a9eea2 | 3616 | } |
6de9cd9a DN |
3617 | } |
3618 | ||
524af0d6 | 3619 | return true; |
6de9cd9a DN |
3620 | } |
3621 | ||
3622 | ||
3623 | /* Check how a procedure is used against its interface. If all goes | |
3624 | well, the actual argument list will also end up being properly | |
3625 | sorted. */ | |
3626 | ||
524af0d6 | 3627 | bool |
b251af97 | 3628 | gfc_procedure_use (gfc_symbol *sym, gfc_actual_arglist **ap, locus *where) |
6de9cd9a | 3629 | { |
f3883269 | 3630 | gfc_actual_arglist *a; |
4cbc9039 JW |
3631 | gfc_formal_arglist *dummy_args; |
3632 | ||
a9c5fe7e | 3633 | /* Warn about calls with an implicit interface. Special case |
6bd2c800 | 3634 | for calling a ISO_C_BINDING because c_loc and c_funloc |
ca071303 FXC |
3635 | are pseudo-unknown. Additionally, warn about procedures not |
3636 | explicitly declared at all if requested. */ | |
8b7a967e | 3637 | if (sym->attr.if_source == IFSRC_UNKNOWN && !sym->attr.is_iso_c) |
ca071303 | 3638 | { |
8b7a967e TB |
3639 | if (sym->ns->has_implicit_none_export && sym->attr.proc == PROC_UNKNOWN) |
3640 | { | |
bcc478b9 BRF |
3641 | const char *guessed |
3642 | = gfc_lookup_function_fuzzy (sym->name, sym->ns->sym_root); | |
3643 | if (guessed) | |
3644 | gfc_error ("Procedure %qs called at %L is not explicitly declared" | |
3645 | "; did you mean %qs?", | |
3646 | sym->name, where, guessed); | |
3647 | else | |
3648 | gfc_error ("Procedure %qs called at %L is not explicitly declared", | |
3649 | sym->name, where); | |
8b7a967e TB |
3650 | return false; |
3651 | } | |
73e42eef | 3652 | if (warn_implicit_interface) |
48749dbc MLI |
3653 | gfc_warning (OPT_Wimplicit_interface, |
3654 | "Procedure %qs called with an implicit interface at %L", | |
ca071303 | 3655 | sym->name, where); |
73e42eef | 3656 | else if (warn_implicit_procedure && sym->attr.proc == PROC_UNKNOWN) |
48749dbc MLI |
3657 | gfc_warning (OPT_Wimplicit_procedure, |
3658 | "Procedure %qs called at %L is not explicitly declared", | |
ca071303 | 3659 | sym->name, where); |
7fa35a4b | 3660 | gfc_find_proc_namespace (sym->ns)->implicit_interface_calls = 1; |
ca071303 | 3661 | } |
6de9cd9a | 3662 | |
e6895430 | 3663 | if (sym->attr.if_source == IFSRC_UNKNOWN) |
ac05557c | 3664 | { |
86d7449c TB |
3665 | if (sym->attr.pointer) |
3666 | { | |
c4100eae MLI |
3667 | gfc_error ("The pointer object %qs at %L must have an explicit " |
3668 | "function interface or be declared as array", | |
3669 | sym->name, where); | |
524af0d6 | 3670 | return false; |
86d7449c TB |
3671 | } |
3672 | ||
3673 | if (sym->attr.allocatable && !sym->attr.external) | |
3674 | { | |
c4100eae MLI |
3675 | gfc_error ("The allocatable object %qs at %L must have an explicit " |
3676 | "function interface or be declared as array", | |
3677 | sym->name, where); | |
524af0d6 | 3678 | return false; |
86d7449c TB |
3679 | } |
3680 | ||
3681 | if (sym->attr.allocatable) | |
3682 | { | |
c4100eae MLI |
3683 | gfc_error ("Allocatable function %qs at %L must have an explicit " |
3684 | "function interface", sym->name, where); | |
524af0d6 | 3685 | return false; |
86d7449c TB |
3686 | } |
3687 | ||
ac05557c DF |
3688 | for (a = *ap; a; a = a->next) |
3689 | { | |
3690 | /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */ | |
3691 | if (a->name != NULL && a->name[0] != '%') | |
3692 | { | |
c4100eae MLI |
3693 | gfc_error ("Keyword argument requires explicit interface " |
3694 | "for procedure %qs at %L", sym->name, &a->expr->where); | |
ac05557c DF |
3695 | break; |
3696 | } | |
fea54935 | 3697 | |
45a69325 TB |
3698 | /* TS 29113, 6.2. */ |
3699 | if (a->expr && a->expr->ts.type == BT_ASSUMED | |
3700 | && sym->intmod_sym_id != ISOCBINDING_LOC) | |
3701 | { | |
3702 | gfc_error ("Assumed-type argument %s at %L requires an explicit " | |
3703 | "interface", a->expr->symtree->n.sym->name, | |
3704 | &a->expr->where); | |
3705 | break; | |
3706 | } | |
3707 | ||
fea54935 TB |
3708 | /* F2008, C1303 and C1304. */ |
3709 | if (a->expr | |
3710 | && (a->expr->ts.type == BT_DERIVED || a->expr->ts.type == BT_CLASS) | |
3711 | && ((a->expr->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV | |
3712 | && a->expr->ts.u.derived->intmod_sym_id == ISOFORTRAN_LOCK_TYPE) | |
3713 | || gfc_expr_attr (a->expr).lock_comp)) | |
3714 | { | |
c4100eae MLI |
3715 | gfc_error ("Actual argument of LOCK_TYPE or with LOCK_TYPE " |
3716 | "component at %L requires an explicit interface for " | |
3717 | "procedure %qs", &a->expr->where, sym->name); | |
fea54935 TB |
3718 | break; |
3719 | } | |
ea8ad3e5 | 3720 | |
5df445a2 TB |
3721 | if (a->expr |
3722 | && (a->expr->ts.type == BT_DERIVED || a->expr->ts.type == BT_CLASS) | |
3723 | && ((a->expr->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV | |
3724 | && a->expr->ts.u.derived->intmod_sym_id | |
3725 | == ISOFORTRAN_EVENT_TYPE) | |
3726 | || gfc_expr_attr (a->expr).event_comp)) | |
3727 | { | |
3728 | gfc_error ("Actual argument of EVENT_TYPE or with EVENT_TYPE " | |
3729 | "component at %L requires an explicit interface for " | |
3730 | "procedure %qs", &a->expr->where, sym->name); | |
3731 | break; | |
3732 | } | |
3733 | ||
ea8ad3e5 TB |
3734 | if (a->expr && a->expr->expr_type == EXPR_NULL |
3735 | && a->expr->ts.type == BT_UNKNOWN) | |
3736 | { | |
3737 | gfc_error ("MOLD argument to NULL required at %L", &a->expr->where); | |
524af0d6 | 3738 | return false; |
ea8ad3e5 | 3739 | } |
c62c6622 TB |
3740 | |
3741 | /* TS 29113, C407b. */ | |
3742 | if (a->expr && a->expr->expr_type == EXPR_VARIABLE | |
3743 | && symbol_rank (a->expr->symtree->n.sym) == -1) | |
3744 | { | |
3745 | gfc_error ("Assumed-rank argument requires an explicit interface " | |
3746 | "at %L", &a->expr->where); | |
524af0d6 | 3747 | return false; |
c62c6622 | 3748 | } |
ac05557c DF |
3749 | } |
3750 | ||
524af0d6 | 3751 | return true; |
ac05557c DF |
3752 | } |
3753 | ||
4cbc9039 JW |
3754 | dummy_args = gfc_sym_get_dummy_args (sym); |
3755 | ||
f3883269 SK |
3756 | /* For a statement function, check that types and type parameters of actual |
3757 | arguments and dummy arguments match. */ | |
3758 | if (!compare_actual_formal (ap, dummy_args, 0, sym->attr.elemental, | |
3759 | sym->attr.proc == PROC_ST_FUNCTION, where)) | |
524af0d6 | 3760 | return false; |
f3883269 | 3761 | |
524af0d6 JB |
3762 | if (!check_intents (dummy_args, *ap)) |
3763 | return false; | |
6de9cd9a | 3764 | |
73e42eef | 3765 | if (warn_aliasing) |
4cbc9039 | 3766 | check_some_aliasing (dummy_args, *ap); |
f8552cd4 | 3767 | |
524af0d6 | 3768 | return true; |
6de9cd9a DN |
3769 | } |
3770 | ||
3771 | ||
7e196f89 JW |
3772 | /* Check how a procedure pointer component is used against its interface. |
3773 | If all goes well, the actual argument list will also end up being properly | |
3774 | sorted. Completely analogous to gfc_procedure_use. */ | |
3775 | ||
3776 | void | |
3777 | gfc_ppc_use (gfc_component *comp, gfc_actual_arglist **ap, locus *where) | |
3778 | { | |
7e196f89 | 3779 | /* Warn about calls with an implicit interface. Special case |
6bd2c800 | 3780 | for calling a ISO_C_BINDING because c_loc and c_funloc |
7e196f89 | 3781 | are pseudo-unknown. */ |
73e42eef | 3782 | if (warn_implicit_interface |
7e196f89 JW |
3783 | && comp->attr.if_source == IFSRC_UNKNOWN |
3784 | && !comp->attr.is_iso_c) | |
48749dbc MLI |
3785 | gfc_warning (OPT_Wimplicit_interface, |
3786 | "Procedure pointer component %qs called with an implicit " | |
7e196f89 JW |
3787 | "interface at %L", comp->name, where); |
3788 | ||
3789 | if (comp->attr.if_source == IFSRC_UNKNOWN) | |
3790 | { | |
3791 | gfc_actual_arglist *a; | |
3792 | for (a = *ap; a; a = a->next) | |
3793 | { | |
3794 | /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */ | |
3795 | if (a->name != NULL && a->name[0] != '%') | |
3796 | { | |
c4100eae MLI |
3797 | gfc_error ("Keyword argument requires explicit interface " |
3798 | "for procedure pointer component %qs at %L", | |
3799 | comp->name, &a->expr->where); | |
7e196f89 JW |
3800 | break; |
3801 | } | |
3802 | } | |
3803 | ||
3804 | return; | |
3805 | } | |
3806 | ||
4cbc9039 | 3807 | if (!compare_actual_formal (ap, comp->ts.interface->formal, 0, |
f3883269 | 3808 | comp->attr.elemental, false, where)) |
7e196f89 JW |
3809 | return; |
3810 | ||
4cbc9039 | 3811 | check_intents (comp->ts.interface->formal, *ap); |
73e42eef | 3812 | if (warn_aliasing) |
4cbc9039 | 3813 | check_some_aliasing (comp->ts.interface->formal, *ap); |
7e196f89 JW |
3814 | } |
3815 | ||
3816 | ||
f0ac18b7 DK |
3817 | /* Try if an actual argument list matches the formal list of a symbol, |
3818 | respecting the symbol's attributes like ELEMENTAL. This is used for | |
3819 | GENERIC resolution. */ | |
3820 | ||
3821 | bool | |
3822 | gfc_arglist_matches_symbol (gfc_actual_arglist** args, gfc_symbol* sym) | |
3823 | { | |
4cbc9039 | 3824 | gfc_formal_arglist *dummy_args; |
f0ac18b7 DK |
3825 | bool r; |
3826 | ||
1d101216 JD |
3827 | if (sym->attr.flavor != FL_PROCEDURE) |
3828 | return false; | |
f0ac18b7 | 3829 | |
4cbc9039 JW |
3830 | dummy_args = gfc_sym_get_dummy_args (sym); |
3831 | ||
f0ac18b7 | 3832 | r = !sym->attr.elemental; |
f3883269 | 3833 | if (compare_actual_formal (args, dummy_args, r, !r, false, NULL)) |
f0ac18b7 | 3834 | { |
4cbc9039 | 3835 | check_intents (dummy_args, *args); |
73e42eef | 3836 | if (warn_aliasing) |
4cbc9039 | 3837 | check_some_aliasing (dummy_args, *args); |
f0ac18b7 DK |
3838 | return true; |
3839 | } | |
3840 | ||
3841 | return false; | |
3842 | } | |
3843 | ||
3844 | ||
6de9cd9a DN |
3845 | /* Given an interface pointer and an actual argument list, search for |
3846 | a formal argument list that matches the actual. If found, returns | |
3847 | a pointer to the symbol of the correct interface. Returns NULL if | |
3848 | not found. */ | |
3849 | ||
3850 | gfc_symbol * | |
b251af97 SK |
3851 | gfc_search_interface (gfc_interface *intr, int sub_flag, |
3852 | gfc_actual_arglist **ap) | |
6de9cd9a | 3853 | { |
22a0a780 | 3854 | gfc_symbol *elem_sym = NULL; |
ea8ad3e5 TB |
3855 | gfc_symbol *null_sym = NULL; |
3856 | locus null_expr_loc; | |
3857 | gfc_actual_arglist *a; | |
3858 | bool has_null_arg = false; | |
3859 | ||
3860 | for (a = *ap; a; a = a->next) | |
3861 | if (a->expr && a->expr->expr_type == EXPR_NULL | |
3862 | && a->expr->ts.type == BT_UNKNOWN) | |
3863 | { | |
3864 | has_null_arg = true; | |
3865 | null_expr_loc = a->expr->where; | |
3866 | break; | |
8b704316 | 3867 | } |
ea8ad3e5 | 3868 | |
6de9cd9a DN |
3869 | for (; intr; intr = intr->next) |
3870 | { | |
f6288c24 | 3871 | if (gfc_fl_struct (intr->sym->attr.flavor)) |
c3f34952 | 3872 | continue; |
6de9cd9a DN |
3873 | if (sub_flag && intr->sym->attr.function) |
3874 | continue; | |
3875 | if (!sub_flag && intr->sym->attr.subroutine) | |
3876 | continue; | |
3877 | ||
f0ac18b7 | 3878 | if (gfc_arglist_matches_symbol (ap, intr->sym)) |
22a0a780 | 3879 | { |
ea8ad3e5 TB |
3880 | if (has_null_arg && null_sym) |
3881 | { | |
3882 | gfc_error ("MOLD= required in NULL() argument at %L: Ambiguity " | |
3883 | "between specific functions %s and %s", | |
3884 | &null_expr_loc, null_sym->name, intr->sym->name); | |
3885 | return NULL; | |
3886 | } | |
3887 | else if (has_null_arg) | |
3888 | { | |
3889 | null_sym = intr->sym; | |
3890 | continue; | |
3891 | } | |
3892 | ||
22a0a780 | 3893 | /* Satisfy 12.4.4.1 such that an elemental match has lower |
8b704316 | 3894 | weight than a non-elemental match. */ |
22a0a780 PT |
3895 | if (intr->sym->attr.elemental) |
3896 | { | |
3897 | elem_sym = intr->sym; | |
3898 | continue; | |
3899 | } | |
3900 | return intr->sym; | |
3901 | } | |
6de9cd9a DN |
3902 | } |
3903 | ||
ea8ad3e5 TB |
3904 | if (null_sym) |
3905 | return null_sym; | |
3906 | ||
22a0a780 | 3907 | return elem_sym ? elem_sym : NULL; |
6de9cd9a DN |
3908 | } |
3909 | ||
3910 | ||
3911 | /* Do a brute force recursive search for a symbol. */ | |
3912 | ||
3913 | static gfc_symtree * | |
b251af97 | 3914 | find_symtree0 (gfc_symtree *root, gfc_symbol *sym) |
6de9cd9a DN |
3915 | { |
3916 | gfc_symtree * st; | |
3917 | ||
3918 | if (root->n.sym == sym) | |
3919 | return root; | |
3920 | ||
3921 | st = NULL; | |
3922 | if (root->left) | |
3923 | st = find_symtree0 (root->left, sym); | |
3924 | if (root->right && ! st) | |
3925 | st = find_symtree0 (root->right, sym); | |
3926 | return st; | |
3927 | } | |
3928 | ||
3929 | ||
3930 | /* Find a symtree for a symbol. */ | |
3931 | ||
f6fad28e DK |
3932 | gfc_symtree * |
3933 | gfc_find_sym_in_symtree (gfc_symbol *sym) | |
6de9cd9a DN |
3934 | { |
3935 | gfc_symtree *st; | |
3936 | gfc_namespace *ns; | |
3937 | ||
3938 | /* First try to find it by name. */ | |
3939 | gfc_find_sym_tree (sym->name, gfc_current_ns, 1, &st); | |
3940 | if (st && st->n.sym == sym) | |
3941 | return st; | |
3942 | ||
66e4ab31 | 3943 | /* If it's been renamed, resort to a brute-force search. */ |
6de9cd9a DN |
3944 | /* TODO: avoid having to do this search. If the symbol doesn't exist |
3945 | in the symtree for the current namespace, it should probably be added. */ | |
3946 | for (ns = gfc_current_ns; ns; ns = ns->parent) | |
3947 | { | |
3948 | st = find_symtree0 (ns->sym_root, sym); | |
3949 | if (st) | |
b251af97 | 3950 | return st; |
6de9cd9a | 3951 | } |
17d5d49f | 3952 | gfc_internal_error ("Unable to find symbol %qs", sym->name); |
66e4ab31 | 3953 | /* Not reached. */ |
6de9cd9a DN |
3954 | } |
3955 | ||
3956 | ||
4a44a72d DK |
3957 | /* See if the arglist to an operator-call contains a derived-type argument |
3958 | with a matching type-bound operator. If so, return the matching specific | |
3959 | procedure defined as operator-target as well as the base-object to use | |
974df0f8 PT |
3960 | (which is the found derived-type argument with operator). The generic |
3961 | name, if any, is transmitted to the final expression via 'gname'. */ | |
4a44a72d DK |
3962 | |
3963 | static gfc_typebound_proc* | |
3964 | matching_typebound_op (gfc_expr** tb_base, | |
3965 | gfc_actual_arglist* args, | |
974df0f8 PT |
3966 | gfc_intrinsic_op op, const char* uop, |
3967 | const char ** gname) | |
4a44a72d DK |
3968 | { |
3969 | gfc_actual_arglist* base; | |
3970 | ||
3971 | for (base = args; base; base = base->next) | |
4b7dd692 | 3972 | if (base->expr->ts.type == BT_DERIVED || base->expr->ts.type == BT_CLASS) |
4a44a72d DK |
3973 | { |
3974 | gfc_typebound_proc* tb; | |
3975 | gfc_symbol* derived; | |
524af0d6 | 3976 | bool result; |
4a44a72d | 3977 | |
efd2e969 PT |
3978 | while (base->expr->expr_type == EXPR_OP |
3979 | && base->expr->value.op.op == INTRINSIC_PARENTHESES) | |
3980 | base->expr = base->expr->value.op.op1; | |
3981 | ||
4b7dd692 | 3982 | if (base->expr->ts.type == BT_CLASS) |
528622fd | 3983 | { |
fba5a793 | 3984 | if (!base->expr->ts.u.derived || CLASS_DATA (base->expr) == NULL |
0a59e583 | 3985 | || !gfc_expr_attr (base->expr).class_ok) |
528622fd JW |
3986 | continue; |
3987 | derived = CLASS_DATA (base->expr)->ts.u.derived; | |
3988 | } | |
4b7dd692 JW |
3989 | else |
3990 | derived = base->expr->ts.u.derived; | |
4a44a72d DK |
3991 | |
3992 | if (op == INTRINSIC_USER) | |
3993 | { | |
3994 | gfc_symtree* tb_uop; | |
3995 | ||
3996 | gcc_assert (uop); | |
3997 | tb_uop = gfc_find_typebound_user_op (derived, &result, uop, | |
3998 | false, NULL); | |
3999 | ||
4000 | if (tb_uop) | |
4001 | tb = tb_uop->n.tb; | |
4002 | else | |
4003 | tb = NULL; | |
4004 | } | |
4005 | else | |
4006 | tb = gfc_find_typebound_intrinsic_op (derived, &result, op, | |
4007 | false, NULL); | |
4008 | ||
4009 | /* This means we hit a PRIVATE operator which is use-associated and | |
4010 | should thus not be seen. */ | |
524af0d6 | 4011 | if (!result) |
4a44a72d DK |
4012 | tb = NULL; |
4013 | ||
4014 | /* Look through the super-type hierarchy for a matching specific | |
4015 | binding. */ | |
4016 | for (; tb; tb = tb->overridden) | |
4017 | { | |
4018 | gfc_tbp_generic* g; | |
4019 | ||
4020 | gcc_assert (tb->is_generic); | |
4021 | for (g = tb->u.generic; g; g = g->next) | |
4022 | { | |
4023 | gfc_symbol* target; | |
4024 | gfc_actual_arglist* argcopy; | |
4025 | bool matches; | |
4026 | ||
4027 | gcc_assert (g->specific); | |
4028 | if (g->specific->error) | |
4029 | continue; | |
4030 | ||
4031 | target = g->specific->u.specific->n.sym; | |
4032 | ||
4033 | /* Check if this arglist matches the formal. */ | |
4034 | argcopy = gfc_copy_actual_arglist (args); | |
4035 | matches = gfc_arglist_matches_symbol (&argcopy, target); | |
4036 | gfc_free_actual_arglist (argcopy); | |
4037 | ||
4038 | /* Return if we found a match. */ | |
4039 | if (matches) | |
4040 | { | |
4041 | *tb_base = base->expr; | |
974df0f8 | 4042 | *gname = g->specific_st->name; |
4a44a72d DK |
4043 | return g->specific; |
4044 | } | |
4045 | } | |
4046 | } | |
4047 | } | |
4048 | ||
4049 | return NULL; | |
4050 | } | |
4051 | ||
4052 | ||
4053 | /* For the 'actual arglist' of an operator call and a specific typebound | |
4054 | procedure that has been found the target of a type-bound operator, build the | |
4055 | appropriate EXPR_COMPCALL and resolve it. We take this indirection over | |
4056 | type-bound procedures rather than resolving type-bound operators 'directly' | |
4057 | so that we can reuse the existing logic. */ | |
4058 | ||
4059 | static void | |
4060 | build_compcall_for_operator (gfc_expr* e, gfc_actual_arglist* actual, | |
974df0f8 PT |
4061 | gfc_expr* base, gfc_typebound_proc* target, |
4062 | const char *gname) | |
4a44a72d DK |
4063 | { |
4064 | e->expr_type = EXPR_COMPCALL; | |
4065 | e->value.compcall.tbp = target; | |
974df0f8 | 4066 | e->value.compcall.name = gname ? gname : "$op"; |
4a44a72d DK |
4067 | e->value.compcall.actual = actual; |
4068 | e->value.compcall.base_object = base; | |
4069 | e->value.compcall.ignore_pass = 1; | |
4070 | e->value.compcall.assign = 0; | |
94fae14b PT |
4071 | if (e->ts.type == BT_UNKNOWN |
4072 | && target->function) | |
4073 | { | |
4074 | if (target->is_generic) | |
4075 | e->ts = target->u.generic->specific->u.specific->n.sym->ts; | |
4076 | else | |
4077 | e->ts = target->u.specific->n.sym->ts; | |
4078 | } | |
4a44a72d DK |
4079 | } |
4080 | ||
4081 | ||
6de9cd9a DN |
4082 | /* This subroutine is called when an expression is being resolved. |
4083 | The expression node in question is either a user defined operator | |
1f2959f0 | 4084 | or an intrinsic operator with arguments that aren't compatible |
6de9cd9a DN |
4085 | with the operator. This subroutine builds an actual argument list |
4086 | corresponding to the operands, then searches for a compatible | |
4087 | interface. If one is found, the expression node is replaced with | |
eaee02a5 JW |
4088 | the appropriate function call. We use the 'match' enum to specify |
4089 | whether a replacement has been made or not, or if an error occurred. */ | |
6de9cd9a | 4090 | |
eaee02a5 JW |
4091 | match |
4092 | gfc_extend_expr (gfc_expr *e) | |
6de9cd9a DN |
4093 | { |
4094 | gfc_actual_arglist *actual; | |
4095 | gfc_symbol *sym; | |
4096 | gfc_namespace *ns; | |
4097 | gfc_user_op *uop; | |
4098 | gfc_intrinsic_op i; | |
974df0f8 | 4099 | const char *gname; |
517d78be JW |
4100 | gfc_typebound_proc* tbo; |
4101 | gfc_expr* tb_base; | |
6de9cd9a DN |
4102 | |
4103 | sym = NULL; | |
4104 | ||
4105 | actual = gfc_get_actual_arglist (); | |
58b03ab2 | 4106 | actual->expr = e->value.op.op1; |
6de9cd9a | 4107 | |
974df0f8 | 4108 | gname = NULL; |
4a44a72d | 4109 | |
58b03ab2 | 4110 | if (e->value.op.op2 != NULL) |
6de9cd9a DN |
4111 | { |
4112 | actual->next = gfc_get_actual_arglist (); | |
58b03ab2 | 4113 | actual->next->expr = e->value.op.op2; |
6de9cd9a DN |
4114 | } |
4115 | ||
e8d4f3fc | 4116 | i = fold_unary_intrinsic (e->value.op.op); |
6de9cd9a | 4117 | |
517d78be JW |
4118 | /* See if we find a matching type-bound operator. */ |
4119 | if (i == INTRINSIC_USER) | |
4120 | tbo = matching_typebound_op (&tb_base, actual, | |
4121 | i, e->value.op.uop->name, &gname); | |
4122 | else | |
4123 | switch (i) | |
4124 | { | |
4125 | #define CHECK_OS_COMPARISON(comp) \ | |
4126 | case INTRINSIC_##comp: \ | |
4127 | case INTRINSIC_##comp##_OS: \ | |
4128 | tbo = matching_typebound_op (&tb_base, actual, \ | |
4129 | INTRINSIC_##comp, NULL, &gname); \ | |
4130 | if (!tbo) \ | |
4131 | tbo = matching_typebound_op (&tb_base, actual, \ | |
4132 | INTRINSIC_##comp##_OS, NULL, &gname); \ | |
4133 | break; | |
4134 | CHECK_OS_COMPARISON(EQ) | |
4135 | CHECK_OS_COMPARISON(NE) | |
4136 | CHECK_OS_COMPARISON(GT) | |
4137 | CHECK_OS_COMPARISON(GE) | |
4138 | CHECK_OS_COMPARISON(LT) | |
4139 | CHECK_OS_COMPARISON(LE) | |
4140 | #undef CHECK_OS_COMPARISON | |
4141 | ||
4142 | default: | |
4143 | tbo = matching_typebound_op (&tb_base, actual, i, NULL, &gname); | |
4144 | break; | |
4145 | } | |
4146 | ||
4147 | /* If there is a matching typebound-operator, replace the expression with | |
4148 | a call to it and succeed. */ | |
4149 | if (tbo) | |
4150 | { | |
4151 | gcc_assert (tb_base); | |
4152 | build_compcall_for_operator (e, actual, tb_base, tbo, gname); | |
4153 | ||
4154 | if (!gfc_resolve_expr (e)) | |
4155 | return MATCH_ERROR; | |
4156 | else | |
4157 | return MATCH_YES; | |
4158 | } | |
e73d3ca6 | 4159 | |
6de9cd9a DN |
4160 | if (i == INTRINSIC_USER) |
4161 | { | |
4162 | for (ns = gfc_current_ns; ns; ns = ns->parent) | |
4163 | { | |
58b03ab2 | 4164 | uop = gfc_find_uop (e->value.op.uop->name, ns); |
6de9cd9a DN |
4165 | if (uop == NULL) |
4166 | continue; | |
4167 | ||
a1ee985f | 4168 | sym = gfc_search_interface (uop->op, 0, &actual); |
6de9cd9a DN |
4169 | if (sym != NULL) |
4170 | break; | |
4171 | } | |
4172 | } | |
4173 | else | |
4174 | { | |
4175 | for (ns = gfc_current_ns; ns; ns = ns->parent) | |
4176 | { | |
3bed9dd0 DF |
4177 | /* Due to the distinction between '==' and '.eq.' and friends, one has |
4178 | to check if either is defined. */ | |
4179 | switch (i) | |
4180 | { | |
4a44a72d DK |
4181 | #define CHECK_OS_COMPARISON(comp) \ |
4182 | case INTRINSIC_##comp: \ | |
4183 | case INTRINSIC_##comp##_OS: \ | |
4184 | sym = gfc_search_interface (ns->op[INTRINSIC_##comp], 0, &actual); \ | |
4185 | if (!sym) \ | |
4186 | sym = gfc_search_interface (ns->op[INTRINSIC_##comp##_OS], 0, &actual); \ | |
4187 | break; | |
4188 | CHECK_OS_COMPARISON(EQ) | |
4189 | CHECK_OS_COMPARISON(NE) | |
4190 | CHECK_OS_COMPARISON(GT) | |
4191 | CHECK_OS_COMPARISON(GE) | |
4192 | CHECK_OS_COMPARISON(LT) | |
4193 | CHECK_OS_COMPARISON(LE) | |
4194 | #undef CHECK_OS_COMPARISON | |
3bed9dd0 DF |
4195 | |
4196 | default: | |
a1ee985f | 4197 | sym = gfc_search_interface (ns->op[i], 0, &actual); |
3bed9dd0 DF |
4198 | } |
4199 | ||
6de9cd9a DN |
4200 | if (sym != NULL) |
4201 | break; | |
4202 | } | |
4203 | } | |
4204 | ||
4a44a72d DK |
4205 | /* TODO: Do an ambiguity-check and error if multiple matching interfaces are |
4206 | found rather than just taking the first one and not checking further. */ | |
4207 | ||
6de9cd9a DN |
4208 | if (sym == NULL) |
4209 | { | |
66e4ab31 | 4210 | /* Don't use gfc_free_actual_arglist(). */ |
04695783 | 4211 | free (actual->next); |
cede9502 | 4212 | free (actual); |
eaee02a5 | 4213 | return MATCH_NO; |
6de9cd9a DN |
4214 | } |
4215 | ||
4216 | /* Change the expression node to a function call. */ | |
4217 | e->expr_type = EXPR_FUNCTION; | |
f6fad28e | 4218 | e->symtree = gfc_find_sym_in_symtree (sym); |
6de9cd9a | 4219 | e->value.function.actual = actual; |
58b03ab2 TS |
4220 | e->value.function.esym = NULL; |
4221 | e->value.function.isym = NULL; | |
cf013e9f | 4222 | e->value.function.name = NULL; |
a1ab6660 | 4223 | e->user_operator = 1; |
6de9cd9a | 4224 | |
524af0d6 | 4225 | if (!gfc_resolve_expr (e)) |
eaee02a5 | 4226 | return MATCH_ERROR; |
6de9cd9a | 4227 | |
eaee02a5 | 4228 | return MATCH_YES; |
6de9cd9a DN |
4229 | } |
4230 | ||
4231 | ||
4f7395ff JW |
4232 | /* Tries to replace an assignment code node with a subroutine call to the |
4233 | subroutine associated with the assignment operator. Return true if the node | |
4234 | was replaced. On false, no error is generated. */ | |
6de9cd9a | 4235 | |
524af0d6 | 4236 | bool |
b251af97 | 4237 | gfc_extend_assign (gfc_code *c, gfc_namespace *ns) |
6de9cd9a DN |
4238 | { |
4239 | gfc_actual_arglist *actual; | |
4f7395ff JW |
4240 | gfc_expr *lhs, *rhs, *tb_base; |
4241 | gfc_symbol *sym = NULL; | |
4242 | const char *gname = NULL; | |
4243 | gfc_typebound_proc* tbo; | |
6de9cd9a | 4244 | |
a513927a | 4245 | lhs = c->expr1; |
6de9cd9a DN |
4246 | rhs = c->expr2; |
4247 | ||
4248 | /* Don't allow an intrinsic assignment to be replaced. */ | |
4b7dd692 | 4249 | if (lhs->ts.type != BT_DERIVED && lhs->ts.type != BT_CLASS |
e19bb186 | 4250 | && (rhs->rank == 0 || rhs->rank == lhs->rank) |
6de9cd9a | 4251 | && (lhs->ts.type == rhs->ts.type |
b251af97 | 4252 | || (gfc_numeric_ts (&lhs->ts) && gfc_numeric_ts (&rhs->ts)))) |
524af0d6 | 4253 | return false; |
6de9cd9a DN |
4254 | |
4255 | actual = gfc_get_actual_arglist (); | |
4256 | actual->expr = lhs; | |
4257 | ||
4258 | actual->next = gfc_get_actual_arglist (); | |
4259 | actual->next->expr = rhs; | |
4260 | ||
4f7395ff JW |
4261 | /* TODO: Ambiguity-check, see above for gfc_extend_expr. */ |
4262 | ||
4263 | /* See if we find a matching type-bound assignment. */ | |
4264 | tbo = matching_typebound_op (&tb_base, actual, INTRINSIC_ASSIGN, | |
4265 | NULL, &gname); | |
4266 | ||
4267 | if (tbo) | |
4268 | { | |
4269 | /* Success: Replace the expression with a type-bound call. */ | |
4270 | gcc_assert (tb_base); | |
4271 | c->expr1 = gfc_get_expr (); | |
4272 | build_compcall_for_operator (c->expr1, actual, tb_base, tbo, gname); | |
4273 | c->expr1->value.compcall.assign = 1; | |
4274 | c->expr1->where = c->loc; | |
4275 | c->expr2 = NULL; | |
4276 | c->op = EXEC_COMPCALL; | |
4277 | return true; | |
4278 | } | |
6de9cd9a | 4279 | |
4f7395ff | 4280 | /* See if we find an 'ordinary' (non-typebound) assignment procedure. */ |
6de9cd9a DN |
4281 | for (; ns; ns = ns->parent) |
4282 | { | |
a1ee985f | 4283 | sym = gfc_search_interface (ns->op[INTRINSIC_ASSIGN], 1, &actual); |
6de9cd9a DN |
4284 | if (sym != NULL) |
4285 | break; | |
4286 | } | |
4287 | ||
4f7395ff | 4288 | if (sym) |
6de9cd9a | 4289 | { |
4f7395ff JW |
4290 | /* Success: Replace the assignment with the call. */ |
4291 | c->op = EXEC_ASSIGN_CALL; | |
4292 | c->symtree = gfc_find_sym_in_symtree (sym); | |
4293 | c->expr1 = NULL; | |
4294 | c->expr2 = NULL; | |
4295 | c->ext.actual = actual; | |
4296 | return true; | |
6de9cd9a DN |
4297 | } |
4298 | ||
4f7395ff JW |
4299 | /* Failure: No assignment procedure found. */ |
4300 | free (actual->next); | |
4301 | free (actual); | |
4302 | return false; | |
6de9cd9a DN |
4303 | } |
4304 | ||
4305 | ||
4306 | /* Make sure that the interface just parsed is not already present in | |
4307 | the given interface list. Ambiguity isn't checked yet since module | |
4308 | procedures can be present without interfaces. */ | |
4309 | ||
524af0d6 | 4310 | bool |
362aa474 | 4311 | gfc_check_new_interface (gfc_interface *base, gfc_symbol *new_sym, locus loc) |
6de9cd9a DN |
4312 | { |
4313 | gfc_interface *ip; | |
4314 | ||
4315 | for (ip = base; ip; ip = ip->next) | |
4316 | { | |
7b901ac4 | 4317 | if (ip->sym == new_sym) |
6de9cd9a | 4318 | { |
c4100eae | 4319 | gfc_error ("Entity %qs at %L is already present in the interface", |
362aa474 | 4320 | new_sym->name, &loc); |
524af0d6 | 4321 | return false; |
6de9cd9a DN |
4322 | } |
4323 | } | |
4324 | ||
524af0d6 | 4325 | return true; |
6de9cd9a DN |
4326 | } |
4327 | ||
4328 | ||
4329 | /* Add a symbol to the current interface. */ | |
4330 | ||
524af0d6 | 4331 | bool |
7b901ac4 | 4332 | gfc_add_interface (gfc_symbol *new_sym) |
6de9cd9a DN |
4333 | { |
4334 | gfc_interface **head, *intr; | |
4335 | gfc_namespace *ns; | |
4336 | gfc_symbol *sym; | |
4337 | ||
4338 | switch (current_interface.type) | |
4339 | { | |
4340 | case INTERFACE_NAMELESS: | |
9e1d712c | 4341 | case INTERFACE_ABSTRACT: |
524af0d6 | 4342 | return true; |
6de9cd9a DN |
4343 | |
4344 | case INTERFACE_INTRINSIC_OP: | |
4345 | for (ns = current_interface.ns; ns; ns = ns->parent) | |
3bed9dd0 DF |
4346 | switch (current_interface.op) |
4347 | { | |
4348 | case INTRINSIC_EQ: | |
4349 | case INTRINSIC_EQ_OS: | |
e73d3ca6 | 4350 | if (!gfc_check_new_interface (ns->op[INTRINSIC_EQ], new_sym, |
524af0d6 | 4351 | gfc_current_locus) |
e73d3ca6 | 4352 | || !gfc_check_new_interface (ns->op[INTRINSIC_EQ_OS], |
524af0d6 JB |
4353 | new_sym, gfc_current_locus)) |
4354 | return false; | |
3bed9dd0 DF |
4355 | break; |
4356 | ||
4357 | case INTRINSIC_NE: | |
4358 | case INTRINSIC_NE_OS: | |
e73d3ca6 | 4359 | if (!gfc_check_new_interface (ns->op[INTRINSIC_NE], new_sym, |
524af0d6 | 4360 | gfc_current_locus) |
e73d3ca6 | 4361 | || !gfc_check_new_interface (ns->op[INTRINSIC_NE_OS], |
524af0d6 JB |
4362 | new_sym, gfc_current_locus)) |
4363 | return false; | |
3bed9dd0 DF |
4364 | break; |
4365 | ||
4366 | case INTRINSIC_GT: | |
4367 | case INTRINSIC_GT_OS: | |
e73d3ca6 | 4368 | if (!gfc_check_new_interface (ns->op[INTRINSIC_GT], |
524af0d6 | 4369 | new_sym, gfc_current_locus) |
e73d3ca6 | 4370 | || !gfc_check_new_interface (ns->op[INTRINSIC_GT_OS], |
524af0d6 JB |
4371 | new_sym, gfc_current_locus)) |
4372 | return false; | |
3bed9dd0 DF |
4373 | break; |
4374 | ||
4375 | case INTRINSIC_GE: | |
4376 | case INTRINSIC_GE_OS: | |
e73d3ca6 | 4377 | if (!gfc_check_new_interface (ns->op[INTRINSIC_GE], |
524af0d6 | 4378 | new_sym, gfc_current_locus) |
e73d3ca6 | 4379 | || !gfc_check_new_interface (ns->op[INTRINSIC_GE_OS], |
524af0d6 JB |
4380 | new_sym, gfc_current_locus)) |
4381 | return false; | |
3bed9dd0 DF |
4382 | break; |
4383 | ||
4384 | case INTRINSIC_LT: | |
4385 | case INTRINSIC_LT_OS: | |
e73d3ca6 | 4386 | if (!gfc_check_new_interface (ns->op[INTRINSIC_LT], |
524af0d6 | 4387 | new_sym, gfc_current_locus) |
e73d3ca6 | 4388 | || !gfc_check_new_interface (ns->op[INTRINSIC_LT_OS], |
524af0d6 JB |
4389 | new_sym, gfc_current_locus)) |
4390 | return false; | |
3bed9dd0 DF |
4391 | break; |
4392 | ||
4393 | case INTRINSIC_LE: | |
4394 | case INTRINSIC_LE_OS: | |
e73d3ca6 | 4395 | if (!gfc_check_new_interface (ns->op[INTRINSIC_LE], |
524af0d6 | 4396 | new_sym, gfc_current_locus) |
e73d3ca6 | 4397 | || !gfc_check_new_interface (ns->op[INTRINSIC_LE_OS], |
524af0d6 JB |
4398 | new_sym, gfc_current_locus)) |
4399 | return false; | |
3bed9dd0 DF |
4400 | break; |
4401 | ||
4402 | default: | |
e73d3ca6 | 4403 | if (!gfc_check_new_interface (ns->op[current_interface.op], |
524af0d6 JB |
4404 | new_sym, gfc_current_locus)) |
4405 | return false; | |
3bed9dd0 | 4406 | } |
6de9cd9a | 4407 | |
a1ee985f | 4408 | head = ¤t_interface.ns->op[current_interface.op]; |
6de9cd9a DN |
4409 | break; |
4410 | ||
4411 | case INTERFACE_GENERIC: | |
e73d3ca6 | 4412 | case INTERFACE_DTIO: |
6de9cd9a DN |
4413 | for (ns = current_interface.ns; ns; ns = ns->parent) |
4414 | { | |
4415 | gfc_find_symbol (current_interface.sym->name, ns, 0, &sym); | |
4416 | if (sym == NULL) | |
4417 | continue; | |
4418 | ||
e73d3ca6 | 4419 | if (!gfc_check_new_interface (sym->generic, |
524af0d6 JB |
4420 | new_sym, gfc_current_locus)) |
4421 | return false; | |
6de9cd9a DN |
4422 | } |
4423 | ||
4424 | head = ¤t_interface.sym->generic; | |
4425 | break; | |
4426 | ||
4427 | case INTERFACE_USER_OP: | |
e73d3ca6 | 4428 | if (!gfc_check_new_interface (current_interface.uop->op, |
524af0d6 JB |
4429 | new_sym, gfc_current_locus)) |
4430 | return false; | |
6de9cd9a | 4431 | |
a1ee985f | 4432 | head = ¤t_interface.uop->op; |
6de9cd9a DN |
4433 | break; |
4434 | ||
4435 | default: | |
4436 | gfc_internal_error ("gfc_add_interface(): Bad interface type"); | |
4437 | } | |
4438 | ||
4439 | intr = gfc_get_interface (); | |
7b901ac4 | 4440 | intr->sym = new_sym; |
63645982 | 4441 | intr->where = gfc_current_locus; |
6de9cd9a DN |
4442 | |
4443 | intr->next = *head; | |
4444 | *head = intr; | |
4445 | ||
524af0d6 | 4446 | return true; |
6de9cd9a DN |
4447 | } |
4448 | ||
4449 | ||
2b77e908 FXC |
4450 | gfc_interface * |
4451 | gfc_current_interface_head (void) | |
4452 | { | |
4453 | switch (current_interface.type) | |
4454 | { | |
4455 | case INTERFACE_INTRINSIC_OP: | |
a1ee985f | 4456 | return current_interface.ns->op[current_interface.op]; |
2b77e908 FXC |
4457 | |
4458 | case INTERFACE_GENERIC: | |
e73d3ca6 | 4459 | case INTERFACE_DTIO: |
2b77e908 | 4460 | return current_interface.sym->generic; |
2b77e908 FXC |
4461 | |
4462 | case INTERFACE_USER_OP: | |
a1ee985f | 4463 | return current_interface.uop->op; |
2b77e908 FXC |
4464 | |
4465 | default: | |
4466 | gcc_unreachable (); | |
4467 | } | |
4468 | } | |
4469 | ||
4470 | ||
4471 | void | |
4472 | gfc_set_current_interface_head (gfc_interface *i) | |
4473 | { | |
4474 | switch (current_interface.type) | |
4475 | { | |
4476 | case INTERFACE_INTRINSIC_OP: | |
a1ee985f | 4477 | current_interface.ns->op[current_interface.op] = i; |
2b77e908 FXC |
4478 | break; |
4479 | ||
4480 | case INTERFACE_GENERIC: | |
e73d3ca6 | 4481 | case INTERFACE_DTIO: |
2b77e908 FXC |
4482 | current_interface.sym->generic = i; |
4483 | break; | |
4484 | ||
4485 | case INTERFACE_USER_OP: | |
a1ee985f | 4486 | current_interface.uop->op = i; |
2b77e908 FXC |
4487 | break; |
4488 | ||
4489 | default: | |
4490 | gcc_unreachable (); | |
4491 | } | |
4492 | } | |
4493 | ||
4494 | ||
6de9cd9a DN |
4495 | /* Gets rid of a formal argument list. We do not free symbols. |
4496 | Symbols are freed when a namespace is freed. */ | |
4497 | ||
4498 | void | |
b251af97 | 4499 | gfc_free_formal_arglist (gfc_formal_arglist *p) |
6de9cd9a DN |
4500 | { |
4501 | gfc_formal_arglist *q; | |
4502 | ||
4503 | for (; p; p = q) | |
4504 | { | |
4505 | q = p->next; | |
cede9502 | 4506 | free (p); |
6de9cd9a DN |
4507 | } |
4508 | } | |
99fc1b90 JW |
4509 | |
4510 | ||
9795c594 JW |
4511 | /* Check that it is ok for the type-bound procedure 'proc' to override the |
4512 | procedure 'old', cf. F08:4.5.7.3. */ | |
99fc1b90 | 4513 | |
524af0d6 | 4514 | bool |
99fc1b90 JW |
4515 | gfc_check_typebound_override (gfc_symtree* proc, gfc_symtree* old) |
4516 | { | |
4517 | locus where; | |
edc802c7 | 4518 | gfc_symbol *proc_target, *old_target; |
99fc1b90 | 4519 | unsigned proc_pass_arg, old_pass_arg, argpos; |
9795c594 JW |
4520 | gfc_formal_arglist *proc_formal, *old_formal; |
4521 | bool check_type; | |
4522 | char err[200]; | |
99fc1b90 JW |
4523 | |
4524 | /* This procedure should only be called for non-GENERIC proc. */ | |
4525 | gcc_assert (!proc->n.tb->is_generic); | |
4526 | ||
4527 | /* If the overwritten procedure is GENERIC, this is an error. */ | |
4528 | if (old->n.tb->is_generic) | |
4529 | { | |
c4100eae | 4530 | gfc_error ("Can't overwrite GENERIC %qs at %L", |
99fc1b90 | 4531 | old->name, &proc->n.tb->where); |
524af0d6 | 4532 | return false; |
99fc1b90 JW |
4533 | } |
4534 | ||
4535 | where = proc->n.tb->where; | |
4536 | proc_target = proc->n.tb->u.specific->n.sym; | |
4537 | old_target = old->n.tb->u.specific->n.sym; | |
4538 | ||
4539 | /* Check that overridden binding is not NON_OVERRIDABLE. */ | |
4540 | if (old->n.tb->non_overridable) | |
4541 | { | |
c4100eae | 4542 | gfc_error ("%qs at %L overrides a procedure binding declared" |
99fc1b90 | 4543 | " NON_OVERRIDABLE", proc->name, &where); |
524af0d6 | 4544 | return false; |
99fc1b90 JW |
4545 | } |
4546 | ||
4547 | /* It's an error to override a non-DEFERRED procedure with a DEFERRED one. */ | |
4548 | if (!old->n.tb->deferred && proc->n.tb->deferred) | |
4549 | { | |
c4100eae | 4550 | gfc_error ("%qs at %L must not be DEFERRED as it overrides a" |
99fc1b90 | 4551 | " non-DEFERRED binding", proc->name, &where); |
524af0d6 | 4552 | return false; |
99fc1b90 JW |
4553 | } |
4554 | ||
4555 | /* If the overridden binding is PURE, the overriding must be, too. */ | |
4556 | if (old_target->attr.pure && !proc_target->attr.pure) | |
4557 | { | |
c4100eae | 4558 | gfc_error ("%qs at %L overrides a PURE procedure and must also be PURE", |
99fc1b90 | 4559 | proc->name, &where); |
524af0d6 | 4560 | return false; |
99fc1b90 JW |
4561 | } |
4562 | ||
4563 | /* If the overridden binding is ELEMENTAL, the overriding must be, too. If it | |
4564 | is not, the overriding must not be either. */ | |
4565 | if (old_target->attr.elemental && !proc_target->attr.elemental) | |
4566 | { | |
c4100eae | 4567 | gfc_error ("%qs at %L overrides an ELEMENTAL procedure and must also be" |
99fc1b90 | 4568 | " ELEMENTAL", proc->name, &where); |
524af0d6 | 4569 | return false; |
99fc1b90 JW |
4570 | } |
4571 | if (!old_target->attr.elemental && proc_target->attr.elemental) | |
4572 | { | |
c4100eae | 4573 | gfc_error ("%qs at %L overrides a non-ELEMENTAL procedure and must not" |
99fc1b90 | 4574 | " be ELEMENTAL, either", proc->name, &where); |
524af0d6 | 4575 | return false; |
99fc1b90 JW |
4576 | } |
4577 | ||
4578 | /* If the overridden binding is a SUBROUTINE, the overriding must also be a | |
4579 | SUBROUTINE. */ | |
4580 | if (old_target->attr.subroutine && !proc_target->attr.subroutine) | |
4581 | { | |
c4100eae | 4582 | gfc_error ("%qs at %L overrides a SUBROUTINE and must also be a" |
99fc1b90 | 4583 | " SUBROUTINE", proc->name, &where); |
524af0d6 | 4584 | return false; |
99fc1b90 JW |
4585 | } |
4586 | ||
4587 | /* If the overridden binding is a FUNCTION, the overriding must also be a | |
4588 | FUNCTION and have the same characteristics. */ | |
4589 | if (old_target->attr.function) | |
4590 | { | |
4591 | if (!proc_target->attr.function) | |
4592 | { | |
c4100eae | 4593 | gfc_error ("%qs at %L overrides a FUNCTION and must also be a" |
99fc1b90 | 4594 | " FUNCTION", proc->name, &where); |
524af0d6 | 4595 | return false; |
99fc1b90 | 4596 | } |
8b704316 | 4597 | |
4668d6f9 PT |
4598 | if (!gfc_check_result_characteristics (proc_target, old_target, |
4599 | err, sizeof(err))) | |
2240d1cf | 4600 | { |
edc802c7 | 4601 | gfc_error ("Result mismatch for the overriding procedure " |
c4100eae | 4602 | "%qs at %L: %s", proc->name, &where, err); |
524af0d6 | 4603 | return false; |
2240d1cf | 4604 | } |
99fc1b90 JW |
4605 | } |
4606 | ||
4607 | /* If the overridden binding is PUBLIC, the overriding one must not be | |
4608 | PRIVATE. */ | |
4609 | if (old->n.tb->access == ACCESS_PUBLIC | |
4610 | && proc->n.tb->access == ACCESS_PRIVATE) | |
4611 | { | |
c4100eae | 4612 | gfc_error ("%qs at %L overrides a PUBLIC procedure and must not be" |
99fc1b90 | 4613 | " PRIVATE", proc->name, &where); |
524af0d6 | 4614 | return false; |
99fc1b90 JW |
4615 | } |
4616 | ||
4617 | /* Compare the formal argument lists of both procedures. This is also abused | |
4618 | to find the position of the passed-object dummy arguments of both | |
4619 | bindings as at least the overridden one might not yet be resolved and we | |
4620 | need those positions in the check below. */ | |
4621 | proc_pass_arg = old_pass_arg = 0; | |
4622 | if (!proc->n.tb->nopass && !proc->n.tb->pass_arg) | |
4623 | proc_pass_arg = 1; | |
4624 | if (!old->n.tb->nopass && !old->n.tb->pass_arg) | |
4625 | old_pass_arg = 1; | |
4626 | argpos = 1; | |
4cbc9039 JW |
4627 | proc_formal = gfc_sym_get_dummy_args (proc_target); |
4628 | old_formal = gfc_sym_get_dummy_args (old_target); | |
4629 | for ( ; proc_formal && old_formal; | |
99fc1b90 JW |
4630 | proc_formal = proc_formal->next, old_formal = old_formal->next) |
4631 | { | |
4632 | if (proc->n.tb->pass_arg | |
4633 | && !strcmp (proc->n.tb->pass_arg, proc_formal->sym->name)) | |
4634 | proc_pass_arg = argpos; | |
4635 | if (old->n.tb->pass_arg | |
4636 | && !strcmp (old->n.tb->pass_arg, old_formal->sym->name)) | |
4637 | old_pass_arg = argpos; | |
4638 | ||
4639 | /* Check that the names correspond. */ | |
4640 | if (strcmp (proc_formal->sym->name, old_formal->sym->name)) | |
4641 | { | |
c4100eae | 4642 | gfc_error ("Dummy argument %qs of %qs at %L should be named %qs as" |
99fc1b90 JW |
4643 | " to match the corresponding argument of the overridden" |
4644 | " procedure", proc_formal->sym->name, proc->name, &where, | |
4645 | old_formal->sym->name); | |
524af0d6 | 4646 | return false; |
99fc1b90 JW |
4647 | } |
4648 | ||
9795c594 | 4649 | check_type = proc_pass_arg != argpos && old_pass_arg != argpos; |
4668d6f9 | 4650 | if (!gfc_check_dummy_characteristics (proc_formal->sym, old_formal->sym, |
524af0d6 | 4651 | check_type, err, sizeof(err))) |
99fc1b90 | 4652 | { |
2700d0e3 JJ |
4653 | gfc_error_opt (OPT_Wargument_mismatch, |
4654 | "Argument mismatch for the overriding procedure " | |
4655 | "%qs at %L: %s", proc->name, &where, err); | |
524af0d6 | 4656 | return false; |
99fc1b90 JW |
4657 | } |
4658 | ||
4659 | ++argpos; | |
4660 | } | |
4661 | if (proc_formal || old_formal) | |
4662 | { | |
c4100eae | 4663 | gfc_error ("%qs at %L must have the same number of formal arguments as" |
99fc1b90 | 4664 | " the overridden procedure", proc->name, &where); |
524af0d6 | 4665 | return false; |
99fc1b90 JW |
4666 | } |
4667 | ||
4668 | /* If the overridden binding is NOPASS, the overriding one must also be | |
4669 | NOPASS. */ | |
4670 | if (old->n.tb->nopass && !proc->n.tb->nopass) | |
4671 | { | |
c4100eae | 4672 | gfc_error ("%qs at %L overrides a NOPASS binding and must also be" |
99fc1b90 | 4673 | " NOPASS", proc->name, &where); |
524af0d6 | 4674 | return false; |
99fc1b90 JW |
4675 | } |
4676 | ||
4677 | /* If the overridden binding is PASS(x), the overriding one must also be | |
4678 | PASS and the passed-object dummy arguments must correspond. */ | |
4679 | if (!old->n.tb->nopass) | |
4680 | { | |
4681 | if (proc->n.tb->nopass) | |
4682 | { | |
c4100eae | 4683 | gfc_error ("%qs at %L overrides a binding with PASS and must also be" |
99fc1b90 | 4684 | " PASS", proc->name, &where); |
524af0d6 | 4685 | return false; |
99fc1b90 JW |
4686 | } |
4687 | ||
4688 | if (proc_pass_arg != old_pass_arg) | |
4689 | { | |
c4100eae | 4690 | gfc_error ("Passed-object dummy argument of %qs at %L must be at" |
99fc1b90 JW |
4691 | " the same position as the passed-object dummy argument of" |
4692 | " the overridden procedure", proc->name, &where); | |
524af0d6 | 4693 | return false; |
99fc1b90 JW |
4694 | } |
4695 | } | |
4696 | ||
524af0d6 | 4697 | return true; |
99fc1b90 | 4698 | } |
e73d3ca6 PT |
4699 | |
4700 | ||
4701 | /* The following three functions check that the formal arguments | |
4702 | of user defined derived type IO procedures are compliant with | |
f3ad8745 | 4703 | the requirements of the standard, see F03:9.5.3.7.2 (F08:9.6.4.8.3). */ |
e73d3ca6 PT |
4704 | |
4705 | static void | |
4706 | check_dtio_arg_TKR_intent (gfc_symbol *fsym, bool typebound, bt type, | |
4707 | int kind, int rank, sym_intent intent) | |
4708 | { | |
4709 | if (fsym->ts.type != type) | |
739d9339 PT |
4710 | { |
4711 | gfc_error ("DTIO dummy argument at %L must be of type %s", | |
4712 | &fsym->declared_at, gfc_basic_typename (type)); | |
4713 | return; | |
4714 | } | |
e73d3ca6 PT |
4715 | |
4716 | if (fsym->ts.type != BT_CLASS && fsym->ts.type != BT_DERIVED | |
4717 | && fsym->ts.kind != kind) | |
4718 | gfc_error ("DTIO dummy argument at %L must be of KIND = %d", | |
4719 | &fsym->declared_at, kind); | |
4720 | ||
4721 | if (!typebound | |
4722 | && rank == 0 | |
4723 | && (((type == BT_CLASS) && CLASS_DATA (fsym)->attr.dimension) | |
4724 | || ((type != BT_CLASS) && fsym->attr.dimension))) | |
b93a9a15 | 4725 | gfc_error ("DTIO dummy argument at %L must be a scalar", |
e73d3ca6 PT |
4726 | &fsym->declared_at); |
4727 | else if (rank == 1 | |
4728 | && (fsym->as == NULL || fsym->as->type != AS_ASSUMED_SHAPE)) | |
4729 | gfc_error ("DTIO dummy argument at %L must be an " | |
4730 | "ASSUMED SHAPE ARRAY", &fsym->declared_at); | |
4731 | ||
f3ad8745 JW |
4732 | if (type == BT_CHARACTER && fsym->ts.u.cl->length != NULL) |
4733 | gfc_error ("DTIO character argument at %L must have assumed length", | |
4734 | &fsym->declared_at); | |
4735 | ||
e73d3ca6 | 4736 | if (fsym->attr.intent != intent) |
77be9417 | 4737 | gfc_error ("DTIO dummy argument at %L must have INTENT %s", |
e73d3ca6 PT |
4738 | &fsym->declared_at, gfc_code2string (intents, (int)intent)); |
4739 | return; | |
4740 | } | |
4741 | ||
4742 | ||
4743 | static void | |
4744 | check_dtio_interface1 (gfc_symbol *derived, gfc_symtree *tb_io_st, | |
4745 | bool typebound, bool formatted, int code) | |
4746 | { | |
4747 | gfc_symbol *dtio_sub, *generic_proc, *fsym; | |
4748 | gfc_typebound_proc *tb_io_proc, *specific_proc; | |
4749 | gfc_interface *intr; | |
4750 | gfc_formal_arglist *formal; | |
4751 | int arg_num; | |
4752 | ||
4753 | bool read = ((dtio_codes)code == DTIO_RF) | |
4754 | || ((dtio_codes)code == DTIO_RUF); | |
4755 | bt type; | |
4756 | sym_intent intent; | |
4757 | int kind; | |
4758 | ||
4759 | dtio_sub = NULL; | |
4760 | if (typebound) | |
4761 | { | |
4762 | /* Typebound DTIO binding. */ | |
4763 | tb_io_proc = tb_io_st->n.tb; | |
739d9339 PT |
4764 | if (tb_io_proc == NULL) |
4765 | return; | |
4766 | ||
e73d3ca6 PT |
4767 | gcc_assert (tb_io_proc->is_generic); |
4768 | gcc_assert (tb_io_proc->u.generic->next == NULL); | |
4769 | ||
4770 | specific_proc = tb_io_proc->u.generic->specific; | |
739d9339 PT |
4771 | if (specific_proc == NULL || specific_proc->is_generic) |
4772 | return; | |
e73d3ca6 PT |
4773 | |
4774 | dtio_sub = specific_proc->u.specific->n.sym; | |
4775 | } | |
4776 | else | |
4777 | { | |
4778 | generic_proc = tb_io_st->n.sym; | |
739d9339 PT |
4779 | if (generic_proc == NULL || generic_proc->generic == NULL) |
4780 | return; | |
e73d3ca6 PT |
4781 | |
4782 | for (intr = tb_io_st->n.sym->generic; intr; intr = intr->next) | |
4783 | { | |
a8de3002 | 4784 | if (intr->sym && intr->sym->formal && intr->sym->formal->sym |
e73d3ca6 PT |
4785 | && ((intr->sym->formal->sym->ts.type == BT_CLASS |
4786 | && CLASS_DATA (intr->sym->formal->sym)->ts.u.derived | |
4787 | == derived) | |
4788 | || (intr->sym->formal->sym->ts.type == BT_DERIVED | |
4789 | && intr->sym->formal->sym->ts.u.derived == derived))) | |
4790 | { | |
4791 | dtio_sub = intr->sym; | |
4792 | break; | |
4793 | } | |
a8de3002 PT |
4794 | else if (intr->sym && intr->sym->formal && !intr->sym->formal->sym) |
4795 | { | |
4796 | gfc_error ("Alternate return at %L is not permitted in a DTIO " | |
4797 | "procedure", &intr->sym->declared_at); | |
4798 | return; | |
4799 | } | |
e73d3ca6 PT |
4800 | } |
4801 | ||
4802 | if (dtio_sub == NULL) | |
4803 | return; | |
4804 | } | |
4805 | ||
4806 | gcc_assert (dtio_sub); | |
4807 | if (!dtio_sub->attr.subroutine) | |
2f029c08 | 4808 | gfc_error ("DTIO procedure %qs at %L must be a subroutine", |
e73d3ca6 PT |
4809 | dtio_sub->name, &dtio_sub->declared_at); |
4810 | ||
a8de3002 PT |
4811 | arg_num = 0; |
4812 | for (formal = dtio_sub->formal; formal; formal = formal->next) | |
4813 | arg_num++; | |
4814 | ||
4815 | if (arg_num < (formatted ? 6 : 4)) | |
4816 | { | |
2f029c08 | 4817 | gfc_error ("Too few dummy arguments in DTIO procedure %qs at %L", |
a8de3002 PT |
4818 | dtio_sub->name, &dtio_sub->declared_at); |
4819 | return; | |
4820 | } | |
4821 | ||
4822 | if (arg_num > (formatted ? 6 : 4)) | |
4823 | { | |
2f029c08 | 4824 | gfc_error ("Too many dummy arguments in DTIO procedure %qs at %L", |
a8de3002 PT |
4825 | dtio_sub->name, &dtio_sub->declared_at); |
4826 | return; | |
4827 | } | |
4828 | ||
4829 | ||
e73d3ca6 PT |
4830 | /* Now go through the formal arglist. */ |
4831 | arg_num = 1; | |
4832 | for (formal = dtio_sub->formal; formal; formal = formal->next, arg_num++) | |
4833 | { | |
4834 | if (!formatted && arg_num == 3) | |
4835 | arg_num = 5; | |
4836 | fsym = formal->sym; | |
a8de3002 PT |
4837 | |
4838 | if (fsym == NULL) | |
4839 | { | |
4840 | gfc_error ("Alternate return at %L is not permitted in a DTIO " | |
4841 | "procedure", &dtio_sub->declared_at); | |
4842 | return; | |
4843 | } | |
4844 | ||
e73d3ca6 PT |
4845 | switch (arg_num) |
4846 | { | |
4847 | case(1): /* DTV */ | |
4848 | type = derived->attr.sequence || derived->attr.is_bind_c ? | |
4849 | BT_DERIVED : BT_CLASS; | |
4850 | kind = 0; | |
4851 | intent = read ? INTENT_INOUT : INTENT_IN; | |
4852 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
4853 | 0, intent); | |
4854 | break; | |
4855 | ||
4856 | case(2): /* UNIT */ | |
4857 | type = BT_INTEGER; | |
4858 | kind = gfc_default_integer_kind; | |
4859 | intent = INTENT_IN; | |
4860 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
4861 | 0, intent); | |
4862 | break; | |
4863 | case(3): /* IOTYPE */ | |
4864 | type = BT_CHARACTER; | |
4865 | kind = gfc_default_character_kind; | |
4866 | intent = INTENT_IN; | |
4867 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
4868 | 0, intent); | |
4869 | break; | |
4870 | case(4): /* VLIST */ | |
4871 | type = BT_INTEGER; | |
4872 | kind = gfc_default_integer_kind; | |
4873 | intent = INTENT_IN; | |
4874 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
4875 | 1, intent); | |
4876 | break; | |
4877 | case(5): /* IOSTAT */ | |
4878 | type = BT_INTEGER; | |
4879 | kind = gfc_default_integer_kind; | |
4880 | intent = INTENT_OUT; | |
4881 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
4882 | 0, intent); | |
4883 | break; | |
4884 | case(6): /* IOMSG */ | |
4885 | type = BT_CHARACTER; | |
4886 | kind = gfc_default_character_kind; | |
4887 | intent = INTENT_INOUT; | |
4888 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
4889 | 0, intent); | |
4890 | break; | |
4891 | default: | |
4892 | gcc_unreachable (); | |
4893 | } | |
4894 | } | |
4895 | derived->attr.has_dtio_procs = 1; | |
4896 | return; | |
4897 | } | |
4898 | ||
4899 | void | |
4900 | gfc_check_dtio_interfaces (gfc_symbol *derived) | |
4901 | { | |
4902 | gfc_symtree *tb_io_st; | |
4903 | bool t = false; | |
4904 | int code; | |
4905 | bool formatted; | |
4906 | ||
4907 | if (derived->attr.is_class == 1 || derived->attr.vtype == 1) | |
4908 | return; | |
4909 | ||
4910 | /* Check typebound DTIO bindings. */ | |
4911 | for (code = 0; code < 4; code++) | |
4912 | { | |
4913 | formatted = ((dtio_codes)code == DTIO_RF) | |
4914 | || ((dtio_codes)code == DTIO_WF); | |
4915 | ||
4916 | tb_io_st = gfc_find_typebound_proc (derived, &t, | |
4917 | gfc_code2string (dtio_procs, code), | |
4918 | true, &derived->declared_at); | |
4919 | if (tb_io_st != NULL) | |
4920 | check_dtio_interface1 (derived, tb_io_st, true, formatted, code); | |
4921 | } | |
4922 | ||
4923 | /* Check generic DTIO interfaces. */ | |
4924 | for (code = 0; code < 4; code++) | |
4925 | { | |
4926 | formatted = ((dtio_codes)code == DTIO_RF) | |
4927 | || ((dtio_codes)code == DTIO_WF); | |
4928 | ||
4929 | tb_io_st = gfc_find_symtree (derived->ns->sym_root, | |
4930 | gfc_code2string (dtio_procs, code)); | |
4931 | if (tb_io_st != NULL) | |
4932 | check_dtio_interface1 (derived, tb_io_st, false, formatted, code); | |
4933 | } | |
4934 | } | |
4935 | ||
4936 | ||
e4e659b9 JW |
4937 | gfc_symtree* |
4938 | gfc_find_typebound_dtio_proc (gfc_symbol *derived, bool write, bool formatted) | |
e73d3ca6 PT |
4939 | { |
4940 | gfc_symtree *tb_io_st = NULL; | |
e73d3ca6 PT |
4941 | bool t = false; |
4942 | ||
b93a9a15 | 4943 | if (!derived || !derived->resolved || derived->attr.flavor != FL_DERIVED) |
9beb81ed PT |
4944 | return NULL; |
4945 | ||
e73d3ca6 PT |
4946 | /* Try to find a typebound DTIO binding. */ |
4947 | if (formatted == true) | |
4948 | { | |
4949 | if (write == true) | |
4950 | tb_io_st = gfc_find_typebound_proc (derived, &t, | |
4951 | gfc_code2string (dtio_procs, | |
4952 | DTIO_WF), | |
4953 | true, | |
4954 | &derived->declared_at); | |
4955 | else | |
4956 | tb_io_st = gfc_find_typebound_proc (derived, &t, | |
4957 | gfc_code2string (dtio_procs, | |
4958 | DTIO_RF), | |
4959 | true, | |
4960 | &derived->declared_at); | |
4961 | } | |
4962 | else | |
4963 | { | |
4964 | if (write == true) | |
4965 | tb_io_st = gfc_find_typebound_proc (derived, &t, | |
4966 | gfc_code2string (dtio_procs, | |
4967 | DTIO_WUF), | |
4968 | true, | |
4969 | &derived->declared_at); | |
4970 | else | |
4971 | tb_io_st = gfc_find_typebound_proc (derived, &t, | |
4972 | gfc_code2string (dtio_procs, | |
4973 | DTIO_RUF), | |
4974 | true, | |
4975 | &derived->declared_at); | |
4976 | } | |
e4e659b9 JW |
4977 | return tb_io_st; |
4978 | } | |
4979 | ||
4980 | ||
4981 | gfc_symbol * | |
4982 | gfc_find_specific_dtio_proc (gfc_symbol *derived, bool write, bool formatted) | |
4983 | { | |
4984 | gfc_symtree *tb_io_st = NULL; | |
4985 | gfc_symbol *dtio_sub = NULL; | |
4986 | gfc_symbol *extended; | |
4987 | gfc_typebound_proc *tb_io_proc, *specific_proc; | |
4988 | ||
4989 | tb_io_st = gfc_find_typebound_dtio_proc (derived, write, formatted); | |
e73d3ca6 PT |
4990 | |
4991 | if (tb_io_st != NULL) | |
4992 | { | |
096506bb PT |
4993 | const char *genname; |
4994 | gfc_symtree *st; | |
4995 | ||
e73d3ca6 PT |
4996 | tb_io_proc = tb_io_st->n.tb; |
4997 | gcc_assert (tb_io_proc != NULL); | |
4998 | gcc_assert (tb_io_proc->is_generic); | |
4999 | gcc_assert (tb_io_proc->u.generic->next == NULL); | |
5000 | ||
5001 | specific_proc = tb_io_proc->u.generic->specific; | |
5002 | gcc_assert (!specific_proc->is_generic); | |
5003 | ||
096506bb PT |
5004 | /* Go back and make sure that we have the right specific procedure. |
5005 | Here we most likely have a procedure from the parent type, which | |
5006 | can be overridden in extensions. */ | |
5007 | genname = tb_io_proc->u.generic->specific_st->name; | |
5008 | st = gfc_find_typebound_proc (derived, NULL, genname, | |
5009 | true, &tb_io_proc->where); | |
5010 | if (st) | |
5011 | dtio_sub = st->n.tb->u.specific->n.sym; | |
5012 | else | |
5013 | dtio_sub = specific_proc->u.specific->n.sym; | |
e73d3ca6 | 5014 | |
e4e659b9 JW |
5015 | goto finish; |
5016 | } | |
e73d3ca6 PT |
5017 | |
5018 | /* If there is not a typebound binding, look for a generic | |
5019 | DTIO interface. */ | |
5020 | for (extended = derived; extended; | |
5021 | extended = gfc_get_derived_super_type (extended)) | |
5022 | { | |
e4e659b9 JW |
5023 | if (extended == NULL || extended->ns == NULL |
5024 | || extended->attr.flavor == FL_UNKNOWN) | |
a8de3002 PT |
5025 | return NULL; |
5026 | ||
e73d3ca6 PT |
5027 | if (formatted == true) |
5028 | { | |
5029 | if (write == true) | |
5030 | tb_io_st = gfc_find_symtree (extended->ns->sym_root, | |
5031 | gfc_code2string (dtio_procs, | |
5032 | DTIO_WF)); | |
5033 | else | |
5034 | tb_io_st = gfc_find_symtree (extended->ns->sym_root, | |
5035 | gfc_code2string (dtio_procs, | |
5036 | DTIO_RF)); | |
5037 | } | |
5038 | else | |
5039 | { | |
5040 | if (write == true) | |
5041 | tb_io_st = gfc_find_symtree (extended->ns->sym_root, | |
5042 | gfc_code2string (dtio_procs, | |
5043 | DTIO_WUF)); | |
5044 | else | |
5045 | tb_io_st = gfc_find_symtree (extended->ns->sym_root, | |
5046 | gfc_code2string (dtio_procs, | |
5047 | DTIO_RUF)); | |
5048 | } | |
5049 | ||
5050 | if (tb_io_st != NULL | |
5051 | && tb_io_st->n.sym | |
5052 | && tb_io_st->n.sym->generic) | |
5053 | { | |
40109581 | 5054 | for (gfc_interface *intr = tb_io_st->n.sym->generic; |
413e859c | 5055 | intr && intr->sym; intr = intr->next) |
e73d3ca6 | 5056 | { |
413e859c | 5057 | if (intr->sym->formal) |
e73d3ca6 | 5058 | { |
413e859c JW |
5059 | gfc_symbol *fsym = intr->sym->formal->sym; |
5060 | if ((fsym->ts.type == BT_CLASS | |
5061 | && CLASS_DATA (fsym)->ts.u.derived == extended) | |
5062 | || (fsym->ts.type == BT_DERIVED | |
5063 | && fsym->ts.u.derived == extended)) | |
5064 | { | |
5065 | dtio_sub = intr->sym; | |
5066 | break; | |
5067 | } | |
e73d3ca6 PT |
5068 | } |
5069 | } | |
5070 | } | |
5071 | } | |
5072 | ||
5073 | finish: | |
5074 | if (dtio_sub && derived != CLASS_DATA (dtio_sub->formal->sym)->ts.u.derived) | |
5075 | gfc_find_derived_vtab (derived); | |
5076 | ||
5077 | return dtio_sub; | |
5078 | } |