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6de9cd9a | 1 | /* Deal with interfaces. |
83ffe9cd | 2 | Copyright (C) 2000-2023 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 | ||
d5815045 MM |
81 | /* Free the leading members of the gfc_interface linked list given in INTR |
82 | up to the END element (exclusive: the END element is not freed). | |
83 | If END is not nullptr, it is assumed that END is in the linked list starting | |
84 | with INTR. */ | |
6de9cd9a | 85 | |
d5815045 MM |
86 | static void |
87 | free_interface_elements_until (gfc_interface *intr, gfc_interface *end) | |
6de9cd9a DN |
88 | { |
89 | gfc_interface *next; | |
90 | ||
d5815045 | 91 | for (; intr != end; intr = next) |
6de9cd9a DN |
92 | { |
93 | next = intr->next; | |
cede9502 | 94 | free (intr); |
6de9cd9a DN |
95 | } |
96 | } | |
97 | ||
98 | ||
d5815045 MM |
99 | /* Free a singly linked list of gfc_interface structures. */ |
100 | ||
101 | void | |
102 | gfc_free_interface (gfc_interface *intr) | |
103 | { | |
104 | free_interface_elements_until (intr, nullptr); | |
105 | } | |
106 | ||
107 | ||
108 | /* Update the interface pointer given by IFC_PTR to make it point to TAIL. | |
109 | It is expected that TAIL (if non-null) is in the list pointed to by | |
110 | IFC_PTR, hence the tail of it. The members of the list before TAIL are | |
111 | freed before the pointer reassignment. */ | |
112 | ||
113 | void | |
114 | gfc_drop_interface_elements_before (gfc_interface **ifc_ptr, | |
115 | gfc_interface *tail) | |
116 | { | |
117 | if (ifc_ptr == nullptr) | |
118 | return; | |
119 | ||
120 | free_interface_elements_until (*ifc_ptr, tail); | |
121 | *ifc_ptr = tail; | |
122 | } | |
123 | ||
124 | ||
6de9cd9a DN |
125 | /* Change the operators unary plus and minus into binary plus and |
126 | minus respectively, leaving the rest unchanged. */ | |
127 | ||
128 | static gfc_intrinsic_op | |
e8d4f3fc | 129 | fold_unary_intrinsic (gfc_intrinsic_op op) |
6de9cd9a | 130 | { |
a1ee985f | 131 | switch (op) |
6de9cd9a DN |
132 | { |
133 | case INTRINSIC_UPLUS: | |
a1ee985f | 134 | op = INTRINSIC_PLUS; |
6de9cd9a DN |
135 | break; |
136 | case INTRINSIC_UMINUS: | |
a1ee985f | 137 | op = INTRINSIC_MINUS; |
6de9cd9a DN |
138 | break; |
139 | default: | |
140 | break; | |
141 | } | |
142 | ||
a1ee985f | 143 | return op; |
6de9cd9a DN |
144 | } |
145 | ||
146 | ||
195d1431 PT |
147 | /* Return the operator depending on the DTIO moded string. Note that |
148 | these are not operators in the normal sense and so have been placed | |
149 | beyond GFC_INTRINSIC_END in gfortran.h:enum gfc_intrinsic_op. */ | |
e73d3ca6 PT |
150 | |
151 | static gfc_intrinsic_op | |
152 | dtio_op (char* mode) | |
153 | { | |
2eb3745a | 154 | if (strcmp (mode, "formatted") == 0) |
e73d3ca6 | 155 | return INTRINSIC_FORMATTED; |
2eb3745a | 156 | if (strcmp (mode, "unformatted") == 0) |
e73d3ca6 PT |
157 | return INTRINSIC_UNFORMATTED; |
158 | return INTRINSIC_NONE; | |
159 | } | |
160 | ||
161 | ||
6de9cd9a | 162 | /* Match a generic specification. Depending on which type of |
a1ee985f | 163 | interface is found, the 'name' or 'op' pointers may be set. |
6de9cd9a DN |
164 | This subroutine doesn't return MATCH_NO. */ |
165 | ||
166 | match | |
b251af97 | 167 | gfc_match_generic_spec (interface_type *type, |
6de9cd9a | 168 | char *name, |
a1ee985f | 169 | gfc_intrinsic_op *op) |
6de9cd9a DN |
170 | { |
171 | char buffer[GFC_MAX_SYMBOL_LEN + 1]; | |
172 | match m; | |
173 | gfc_intrinsic_op i; | |
174 | ||
175 | if (gfc_match (" assignment ( = )") == MATCH_YES) | |
176 | { | |
177 | *type = INTERFACE_INTRINSIC_OP; | |
a1ee985f | 178 | *op = INTRINSIC_ASSIGN; |
6de9cd9a DN |
179 | return MATCH_YES; |
180 | } | |
181 | ||
182 | if (gfc_match (" operator ( %o )", &i) == MATCH_YES) | |
183 | { /* Operator i/f */ | |
184 | *type = INTERFACE_INTRINSIC_OP; | |
e8d4f3fc | 185 | *op = fold_unary_intrinsic (i); |
6de9cd9a DN |
186 | return MATCH_YES; |
187 | } | |
188 | ||
e8d4f3fc | 189 | *op = INTRINSIC_NONE; |
6de9cd9a DN |
190 | if (gfc_match (" operator ( ") == MATCH_YES) |
191 | { | |
192 | m = gfc_match_defined_op_name (buffer, 1); | |
193 | if (m == MATCH_NO) | |
194 | goto syntax; | |
195 | if (m != MATCH_YES) | |
196 | return MATCH_ERROR; | |
197 | ||
198 | m = gfc_match_char (')'); | |
199 | if (m == MATCH_NO) | |
200 | goto syntax; | |
201 | if (m != MATCH_YES) | |
202 | return MATCH_ERROR; | |
203 | ||
204 | strcpy (name, buffer); | |
205 | *type = INTERFACE_USER_OP; | |
206 | return MATCH_YES; | |
207 | } | |
208 | ||
e73d3ca6 PT |
209 | if (gfc_match (" read ( %n )", buffer) == MATCH_YES) |
210 | { | |
211 | *op = dtio_op (buffer); | |
212 | if (*op == INTRINSIC_FORMATTED) | |
213 | { | |
214 | strcpy (name, gfc_code2string (dtio_procs, DTIO_RF)); | |
215 | *type = INTERFACE_DTIO; | |
216 | } | |
217 | if (*op == INTRINSIC_UNFORMATTED) | |
218 | { | |
219 | strcpy (name, gfc_code2string (dtio_procs, DTIO_RUF)); | |
220 | *type = INTERFACE_DTIO; | |
221 | } | |
222 | if (*op != INTRINSIC_NONE) | |
223 | return MATCH_YES; | |
224 | } | |
225 | ||
226 | if (gfc_match (" write ( %n )", buffer) == MATCH_YES) | |
227 | { | |
228 | *op = dtio_op (buffer); | |
229 | if (*op == INTRINSIC_FORMATTED) | |
230 | { | |
231 | strcpy (name, gfc_code2string (dtio_procs, DTIO_WF)); | |
232 | *type = INTERFACE_DTIO; | |
233 | } | |
234 | if (*op == INTRINSIC_UNFORMATTED) | |
235 | { | |
236 | strcpy (name, gfc_code2string (dtio_procs, DTIO_WUF)); | |
237 | *type = INTERFACE_DTIO; | |
238 | } | |
239 | if (*op != INTRINSIC_NONE) | |
240 | return MATCH_YES; | |
241 | } | |
242 | ||
6de9cd9a DN |
243 | if (gfc_match_name (buffer) == MATCH_YES) |
244 | { | |
245 | strcpy (name, buffer); | |
246 | *type = INTERFACE_GENERIC; | |
247 | return MATCH_YES; | |
248 | } | |
249 | ||
250 | *type = INTERFACE_NAMELESS; | |
251 | return MATCH_YES; | |
252 | ||
253 | syntax: | |
254 | gfc_error ("Syntax error in generic specification at %C"); | |
255 | return MATCH_ERROR; | |
256 | } | |
257 | ||
258 | ||
9e1d712c TB |
259 | /* Match one of the five F95 forms of an interface statement. The |
260 | matcher for the abstract interface follows. */ | |
6de9cd9a DN |
261 | |
262 | match | |
263 | gfc_match_interface (void) | |
264 | { | |
265 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
266 | interface_type type; | |
267 | gfc_symbol *sym; | |
a1ee985f | 268 | gfc_intrinsic_op op; |
6de9cd9a DN |
269 | match m; |
270 | ||
271 | m = gfc_match_space (); | |
272 | ||
a1ee985f | 273 | if (gfc_match_generic_spec (&type, name, &op) == MATCH_ERROR) |
6de9cd9a DN |
274 | return MATCH_ERROR; |
275 | ||
6de9cd9a DN |
276 | /* If we're not looking at the end of the statement now, or if this |
277 | is not a nameless interface but we did not see a space, punt. */ | |
278 | if (gfc_match_eos () != MATCH_YES | |
b251af97 | 279 | || (type != INTERFACE_NAMELESS && m != MATCH_YES)) |
6de9cd9a | 280 | { |
b251af97 SK |
281 | gfc_error ("Syntax error: Trailing garbage in INTERFACE statement " |
282 | "at %C"); | |
6de9cd9a DN |
283 | return MATCH_ERROR; |
284 | } | |
285 | ||
286 | current_interface.type = type; | |
287 | ||
288 | switch (type) | |
289 | { | |
e73d3ca6 | 290 | case INTERFACE_DTIO: |
6de9cd9a DN |
291 | case INTERFACE_GENERIC: |
292 | if (gfc_get_symbol (name, NULL, &sym)) | |
293 | return MATCH_ERROR; | |
294 | ||
8b704316 | 295 | if (!sym->attr.generic |
524af0d6 | 296 | && !gfc_add_generic (&sym->attr, sym->name, NULL)) |
6de9cd9a DN |
297 | return MATCH_ERROR; |
298 | ||
e5d7f6f7 FXC |
299 | if (sym->attr.dummy) |
300 | { | |
c4100eae | 301 | gfc_error ("Dummy procedure %qs at %C cannot have a " |
e5d7f6f7 FXC |
302 | "generic interface", sym->name); |
303 | return MATCH_ERROR; | |
304 | } | |
305 | ||
6de9cd9a DN |
306 | current_interface.sym = gfc_new_block = sym; |
307 | break; | |
308 | ||
309 | case INTERFACE_USER_OP: | |
310 | current_interface.uop = gfc_get_uop (name); | |
311 | break; | |
312 | ||
313 | case INTERFACE_INTRINSIC_OP: | |
a1ee985f | 314 | current_interface.op = op; |
6de9cd9a DN |
315 | break; |
316 | ||
317 | case INTERFACE_NAMELESS: | |
9e1d712c | 318 | case INTERFACE_ABSTRACT: |
6de9cd9a DN |
319 | break; |
320 | } | |
321 | ||
322 | return MATCH_YES; | |
323 | } | |
324 | ||
325 | ||
9e1d712c TB |
326 | |
327 | /* Match a F2003 abstract interface. */ | |
328 | ||
329 | match | |
330 | gfc_match_abstract_interface (void) | |
331 | { | |
332 | match m; | |
333 | ||
524af0d6 | 334 | if (!gfc_notify_std (GFC_STD_F2003, "ABSTRACT INTERFACE at %C")) |
9e1d712c TB |
335 | return MATCH_ERROR; |
336 | ||
337 | m = gfc_match_eos (); | |
338 | ||
339 | if (m != MATCH_YES) | |
340 | { | |
341 | gfc_error ("Syntax error in ABSTRACT INTERFACE statement at %C"); | |
342 | return MATCH_ERROR; | |
343 | } | |
344 | ||
345 | current_interface.type = INTERFACE_ABSTRACT; | |
346 | ||
347 | return m; | |
348 | } | |
349 | ||
350 | ||
6de9cd9a DN |
351 | /* Match the different sort of generic-specs that can be present after |
352 | the END INTERFACE itself. */ | |
353 | ||
354 | match | |
355 | gfc_match_end_interface (void) | |
356 | { | |
357 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
358 | interface_type type; | |
a1ee985f | 359 | gfc_intrinsic_op op; |
6de9cd9a DN |
360 | match m; |
361 | ||
362 | m = gfc_match_space (); | |
363 | ||
a1ee985f | 364 | if (gfc_match_generic_spec (&type, name, &op) == MATCH_ERROR) |
6de9cd9a DN |
365 | return MATCH_ERROR; |
366 | ||
367 | /* If we're not looking at the end of the statement now, or if this | |
368 | is not a nameless interface but we did not see a space, punt. */ | |
369 | if (gfc_match_eos () != MATCH_YES | |
b251af97 | 370 | || (type != INTERFACE_NAMELESS && m != MATCH_YES)) |
6de9cd9a | 371 | { |
b251af97 SK |
372 | gfc_error ("Syntax error: Trailing garbage in END INTERFACE " |
373 | "statement at %C"); | |
6de9cd9a DN |
374 | return MATCH_ERROR; |
375 | } | |
376 | ||
377 | m = MATCH_YES; | |
378 | ||
379 | switch (current_interface.type) | |
380 | { | |
381 | case INTERFACE_NAMELESS: | |
9e1d712c TB |
382 | case INTERFACE_ABSTRACT: |
383 | if (type != INTERFACE_NAMELESS) | |
6de9cd9a DN |
384 | { |
385 | gfc_error ("Expected a nameless interface at %C"); | |
386 | m = MATCH_ERROR; | |
387 | } | |
388 | ||
389 | break; | |
390 | ||
391 | case INTERFACE_INTRINSIC_OP: | |
a1ee985f | 392 | if (type != current_interface.type || op != current_interface.op) |
6de9cd9a DN |
393 | { |
394 | ||
395 | if (current_interface.op == INTRINSIC_ASSIGN) | |
c6d6e62f SK |
396 | { |
397 | m = MATCH_ERROR; | |
a4d9b221 | 398 | gfc_error ("Expected %<END INTERFACE ASSIGNMENT (=)%> at %C"); |
c6d6e62f | 399 | } |
6de9cd9a | 400 | else |
c6d6e62f | 401 | { |
915acec4 | 402 | const char *s1, *s2; |
c6d6e62f SK |
403 | s1 = gfc_op2string (current_interface.op); |
404 | s2 = gfc_op2string (op); | |
405 | ||
406 | /* The following if-statements are used to enforce C1202 | |
407 | from F2003. */ | |
524af0d6 JB |
408 | if ((strcmp(s1, "==") == 0 && strcmp (s2, ".eq.") == 0) |
409 | || (strcmp(s1, ".eq.") == 0 && strcmp (s2, "==") == 0)) | |
c6d6e62f | 410 | break; |
524af0d6 JB |
411 | if ((strcmp(s1, "/=") == 0 && strcmp (s2, ".ne.") == 0) |
412 | || (strcmp(s1, ".ne.") == 0 && strcmp (s2, "/=") == 0)) | |
c6d6e62f | 413 | break; |
524af0d6 JB |
414 | if ((strcmp(s1, "<=") == 0 && strcmp (s2, ".le.") == 0) |
415 | || (strcmp(s1, ".le.") == 0 && strcmp (s2, "<=") == 0)) | |
c6d6e62f | 416 | break; |
524af0d6 JB |
417 | if ((strcmp(s1, "<") == 0 && strcmp (s2, ".lt.") == 0) |
418 | || (strcmp(s1, ".lt.") == 0 && strcmp (s2, "<") == 0)) | |
c6d6e62f | 419 | break; |
524af0d6 JB |
420 | if ((strcmp(s1, ">=") == 0 && strcmp (s2, ".ge.") == 0) |
421 | || (strcmp(s1, ".ge.") == 0 && strcmp (s2, ">=") == 0)) | |
c6d6e62f | 422 | break; |
524af0d6 JB |
423 | if ((strcmp(s1, ">") == 0 && strcmp (s2, ".gt.") == 0) |
424 | || (strcmp(s1, ".gt.") == 0 && strcmp (s2, ">") == 0)) | |
c6d6e62f SK |
425 | break; |
426 | ||
427 | m = MATCH_ERROR; | |
898344a9 SK |
428 | if (strcmp(s2, "none") == 0) |
429 | gfc_error ("Expecting %<END INTERFACE OPERATOR (%s)%> " | |
77be9417 | 430 | "at %C", s1); |
e73d3ca6 | 431 | else |
898344a9 | 432 | gfc_error ("Expecting %<END INTERFACE OPERATOR (%s)%> at %C, " |
77be9417 | 433 | "but got %qs", s1, s2); |
c6d6e62f | 434 | } |
8b704316 | 435 | |
6de9cd9a DN |
436 | } |
437 | ||
438 | break; | |
439 | ||
440 | case INTERFACE_USER_OP: | |
441 | /* Comparing the symbol node names is OK because only use-associated | |
b251af97 | 442 | symbols can be renamed. */ |
6de9cd9a | 443 | if (type != current_interface.type |
9b46f94f | 444 | || strcmp (current_interface.uop->name, name) != 0) |
6de9cd9a | 445 | { |
a4d9b221 | 446 | gfc_error ("Expecting %<END INTERFACE OPERATOR (.%s.)%> at %C", |
55898b2c | 447 | current_interface.uop->name); |
6de9cd9a DN |
448 | m = MATCH_ERROR; |
449 | } | |
450 | ||
451 | break; | |
452 | ||
e73d3ca6 | 453 | case INTERFACE_DTIO: |
6de9cd9a DN |
454 | case INTERFACE_GENERIC: |
455 | if (type != current_interface.type | |
456 | || strcmp (current_interface.sym->name, name) != 0) | |
457 | { | |
a4d9b221 | 458 | gfc_error ("Expecting %<END INTERFACE %s%> at %C", |
6de9cd9a DN |
459 | current_interface.sym->name); |
460 | m = MATCH_ERROR; | |
461 | } | |
462 | ||
463 | break; | |
464 | } | |
465 | ||
466 | return m; | |
467 | } | |
468 | ||
469 | ||
5f88e9b2 FR |
470 | /* Return whether the component was defined anonymously. */ |
471 | ||
472 | static bool | |
473 | is_anonymous_component (gfc_component *cmp) | |
474 | { | |
475 | /* Only UNION and MAP components are anonymous. In the case of a MAP, | |
476 | the derived type symbol is FL_STRUCT and the component name looks like mM*. | |
477 | This is the only case in which the second character of a component name is | |
478 | uppercase. */ | |
479 | return cmp->ts.type == BT_UNION | |
480 | || (cmp->ts.type == BT_DERIVED | |
481 | && cmp->ts.u.derived->attr.flavor == FL_STRUCT | |
482 | && cmp->name[0] && cmp->name[1] && ISUPPER (cmp->name[1])); | |
483 | } | |
484 | ||
485 | ||
486 | /* Return whether the derived type was defined anonymously. */ | |
487 | ||
488 | static bool | |
489 | is_anonymous_dt (gfc_symbol *derived) | |
490 | { | |
491 | /* UNION and MAP types are always anonymous. Otherwise, only nested STRUCTURE | |
492 | types can be anonymous. For anonymous MAP/STRUCTURE, we have FL_STRUCT | |
493 | and the type name looks like XX*. This is the only case in which the | |
494 | second character of a type name is uppercase. */ | |
495 | return derived->attr.flavor == FL_UNION | |
496 | || (derived->attr.flavor == FL_STRUCT | |
497 | && derived->name[0] && derived->name[1] && ISUPPER (derived->name[1])); | |
498 | } | |
499 | ||
500 | ||
f6288c24 FR |
501 | /* Compare components according to 4.4.2 of the Fortran standard. */ |
502 | ||
f3e1097b | 503 | static bool |
f6288c24 FR |
504 | compare_components (gfc_component *cmp1, gfc_component *cmp2, |
505 | gfc_symbol *derived1, gfc_symbol *derived2) | |
506 | { | |
5f88e9b2 FR |
507 | /* Compare names, but not for anonymous components such as UNION or MAP. */ |
508 | if (!is_anonymous_component (cmp1) && !is_anonymous_component (cmp2) | |
509 | && strcmp (cmp1->name, cmp2->name) != 0) | |
f3e1097b | 510 | return false; |
f6288c24 FR |
511 | |
512 | if (cmp1->attr.access != cmp2->attr.access) | |
f3e1097b | 513 | return false; |
f6288c24 FR |
514 | |
515 | if (cmp1->attr.pointer != cmp2->attr.pointer) | |
f3e1097b | 516 | return false; |
f6288c24 FR |
517 | |
518 | if (cmp1->attr.dimension != cmp2->attr.dimension) | |
f3e1097b | 519 | return false; |
f6288c24 FR |
520 | |
521 | if (cmp1->attr.allocatable != cmp2->attr.allocatable) | |
f3e1097b | 522 | return false; |
f6288c24 FR |
523 | |
524 | if (cmp1->attr.dimension && gfc_compare_array_spec (cmp1->as, cmp2->as) == 0) | |
f3e1097b | 525 | return false; |
f6288c24 | 526 | |
56d3a930 FR |
527 | if (cmp1->ts.type == BT_CHARACTER && cmp2->ts.type == BT_CHARACTER) |
528 | { | |
529 | gfc_charlen *l1 = cmp1->ts.u.cl; | |
530 | gfc_charlen *l2 = cmp2->ts.u.cl; | |
531 | if (l1 && l2 && l1->length && l2->length | |
532 | && l1->length->expr_type == EXPR_CONSTANT | |
533 | && l2->length->expr_type == EXPR_CONSTANT | |
534 | && gfc_dep_compare_expr (l1->length, l2->length) != 0) | |
f3e1097b | 535 | return false; |
56d3a930 FR |
536 | } |
537 | ||
f6288c24 FR |
538 | /* Make sure that link lists do not put this function into an |
539 | endless recursive loop! */ | |
540 | if (!(cmp1->ts.type == BT_DERIVED && derived1 == cmp1->ts.u.derived) | |
541 | && !(cmp2->ts.type == BT_DERIVED && derived2 == cmp2->ts.u.derived) | |
f3e1097b JW |
542 | && !gfc_compare_types (&cmp1->ts, &cmp2->ts)) |
543 | return false; | |
f6288c24 FR |
544 | |
545 | else if ( (cmp1->ts.type == BT_DERIVED && derived1 == cmp1->ts.u.derived) | |
546 | && !(cmp2->ts.type == BT_DERIVED && derived2 == cmp2->ts.u.derived)) | |
f3e1097b | 547 | return false; |
f6288c24 FR |
548 | |
549 | else if (!(cmp1->ts.type == BT_DERIVED && derived1 == cmp1->ts.u.derived) | |
550 | && (cmp2->ts.type == BT_DERIVED && derived2 == cmp2->ts.u.derived)) | |
f3e1097b | 551 | return false; |
f6288c24 | 552 | |
f3e1097b | 553 | return true; |
f6288c24 FR |
554 | } |
555 | ||
556 | ||
557 | /* Compare two union types by comparing the components of their maps. | |
558 | Because unions and maps are anonymous their types get special internal | |
559 | names; therefore the usual derived type comparison will fail on them. | |
560 | ||
561 | Returns nonzero if equal, as with gfc_compare_derived_types. Also as with | |
562 | gfc_compare_derived_types, 'equal' is closer to meaning 'duplicate | |
563 | definitions' than 'equivalent structure'. */ | |
564 | ||
f3e1097b JW |
565 | static bool |
566 | compare_union_types (gfc_symbol *un1, gfc_symbol *un2) | |
f6288c24 FR |
567 | { |
568 | gfc_component *map1, *map2, *cmp1, *cmp2; | |
c39747d2 | 569 | gfc_symbol *map1_t, *map2_t; |
f6288c24 FR |
570 | |
571 | if (un1->attr.flavor != FL_UNION || un2->attr.flavor != FL_UNION) | |
f3e1097b | 572 | return false; |
f6288c24 | 573 | |
908b8296 | 574 | if (un1->attr.zero_comp != un2->attr.zero_comp) |
f3e1097b | 575 | return false; |
908b8296 FR |
576 | |
577 | if (un1->attr.zero_comp) | |
f3e1097b | 578 | return true; |
908b8296 | 579 | |
f6288c24 FR |
580 | map1 = un1->components; |
581 | map2 = un2->components; | |
582 | ||
583 | /* In terms of 'equality' here we are worried about types which are | |
584 | declared the same in two places, not types that represent equivalent | |
585 | structures. (This is common because of FORTRAN's weird scoping rules.) | |
586 | Though two unions with their maps in different orders could be equivalent, | |
587 | we will say they are not equal for the purposes of this test; therefore | |
588 | we compare the maps sequentially. */ | |
589 | for (;;) | |
05b8fcb4 FR |
590 | { |
591 | map1_t = map1->ts.u.derived; | |
592 | map2_t = map2->ts.u.derived; | |
c39747d2 | 593 | |
05b8fcb4 FR |
594 | cmp1 = map1_t->components; |
595 | cmp2 = map2_t->components; | |
c39747d2 | 596 | |
05b8fcb4 FR |
597 | /* Protect against null components. */ |
598 | if (map1_t->attr.zero_comp != map2_t->attr.zero_comp) | |
f3e1097b | 599 | return false; |
c39747d2 | 600 | |
05b8fcb4 | 601 | if (map1_t->attr.zero_comp) |
f3e1097b | 602 | return true; |
c39747d2 | 603 | |
05b8fcb4 FR |
604 | for (;;) |
605 | { | |
606 | /* No two fields will ever point to the same map type unless they are | |
607 | the same component, because one map field is created with its type | |
608 | declaration. Therefore don't worry about recursion here. */ | |
609 | /* TODO: worry about recursion into parent types of the unions? */ | |
f3e1097b JW |
610 | if (!compare_components (cmp1, cmp2, map1_t, map2_t)) |
611 | return false; | |
05b8fcb4 FR |
612 | |
613 | cmp1 = cmp1->next; | |
614 | cmp2 = cmp2->next; | |
615 | ||
616 | if (cmp1 == NULL && cmp2 == NULL) | |
617 | break; | |
618 | if (cmp1 == NULL || cmp2 == NULL) | |
f3e1097b | 619 | return false; |
05b8fcb4 | 620 | } |
f6288c24 | 621 | |
05b8fcb4 FR |
622 | map1 = map1->next; |
623 | map2 = map2->next; | |
f6288c24 | 624 | |
05b8fcb4 FR |
625 | if (map1 == NULL && map2 == NULL) |
626 | break; | |
627 | if (map1 == NULL || map2 == NULL) | |
f3e1097b | 628 | return false; |
f6288c24 FR |
629 | } |
630 | ||
f3e1097b | 631 | return true; |
f6288c24 FR |
632 | } |
633 | ||
634 | ||
635 | ||
e0e85e06 PT |
636 | /* Compare two derived types using the criteria in 4.4.2 of the standard, |
637 | recursing through gfc_compare_types for the components. */ | |
6de9cd9a | 638 | |
f3e1097b | 639 | bool |
b251af97 | 640 | gfc_compare_derived_types (gfc_symbol *derived1, gfc_symbol *derived2) |
6de9cd9a | 641 | { |
f6288c24 | 642 | gfc_component *cmp1, *cmp2; |
6de9cd9a | 643 | |
cf2b3c22 | 644 | if (derived1 == derived2) |
f3e1097b | 645 | return true; |
cf2b3c22 | 646 | |
c7082171 SK |
647 | if (!derived1 || !derived2) |
648 | gfc_internal_error ("gfc_compare_derived_types: invalid derived type"); | |
c6423ef3 | 649 | |
fa5cd710 MM |
650 | if (derived1->attr.unlimited_polymorphic |
651 | && derived2->attr.unlimited_polymorphic) | |
652 | return true; | |
653 | ||
654 | if (derived1->attr.unlimited_polymorphic | |
655 | != derived2->attr.unlimited_polymorphic) | |
656 | return false; | |
657 | ||
00074dd8 FR |
658 | /* Compare UNION types specially. */ |
659 | if (derived1->attr.flavor == FL_UNION || derived2->attr.flavor == FL_UNION) | |
f3e1097b | 660 | return compare_union_types (derived1, derived2); |
00074dd8 | 661 | |
6de9cd9a DN |
662 | /* Special case for comparing derived types across namespaces. If the |
663 | true names and module names are the same and the module name is | |
664 | nonnull, then they are equal. */ | |
c6423ef3 | 665 | if (strcmp (derived1->name, derived2->name) == 0 |
b251af97 SK |
666 | && derived1->module != NULL && derived2->module != NULL |
667 | && strcmp (derived1->module, derived2->module) == 0) | |
f3e1097b | 668 | return true; |
6de9cd9a | 669 | |
fa5cd710 MM |
670 | /* Compare type via the rules of the standard. Both types must have the |
671 | SEQUENCE or BIND(C) attribute to be equal. We also compare types | |
672 | recursively if they are class descriptors types or virtual tables types. | |
673 | STRUCTUREs are special because they can be anonymous; therefore two | |
674 | structures with different names may be equal. */ | |
6de9cd9a | 675 | |
5f88e9b2 FR |
676 | /* Compare names, but not for anonymous types such as UNION or MAP. */ |
677 | if (!is_anonymous_dt (derived1) && !is_anonymous_dt (derived2) | |
678 | && strcmp (derived1->name, derived2->name) != 0) | |
f3e1097b | 679 | return false; |
6de9cd9a | 680 | |
e0e85e06 | 681 | if (derived1->component_access == ACCESS_PRIVATE |
b251af97 | 682 | || derived2->component_access == ACCESS_PRIVATE) |
f3e1097b | 683 | return false; |
6de9cd9a | 684 | |
a9e88ec6 | 685 | if (!(derived1->attr.sequence && derived2->attr.sequence) |
5bab4c96 | 686 | && !(derived1->attr.is_bind_c && derived2->attr.is_bind_c) |
fa5cd710 MM |
687 | && !(derived1->attr.is_class && derived2->attr.is_class) |
688 | && !(derived1->attr.vtype && derived2->attr.vtype) | |
5bab4c96 | 689 | && !(derived1->attr.pdt_type && derived2->attr.pdt_type)) |
f3e1097b | 690 | return false; |
6de9cd9a | 691 | |
f6288c24 FR |
692 | /* Protect against null components. */ |
693 | if (derived1->attr.zero_comp != derived2->attr.zero_comp) | |
f3e1097b | 694 | return false; |
f6288c24 FR |
695 | |
696 | if (derived1->attr.zero_comp) | |
f3e1097b | 697 | return true; |
f6288c24 FR |
698 | |
699 | cmp1 = derived1->components; | |
700 | cmp2 = derived2->components; | |
e0e85e06 | 701 | |
6de9cd9a DN |
702 | /* Since subtypes of SEQUENCE types must be SEQUENCE types as well, a |
703 | simple test can speed things up. Otherwise, lots of things have to | |
704 | match. */ | |
705 | for (;;) | |
706 | { | |
f6288c24 | 707 | if (!compare_components (cmp1, cmp2, derived1, derived2)) |
f3e1097b | 708 | return false; |
6de9cd9a | 709 | |
f6288c24 FR |
710 | cmp1 = cmp1->next; |
711 | cmp2 = cmp2->next; | |
2eae3dc7 | 712 | |
f6288c24 | 713 | if (cmp1 == NULL && cmp2 == NULL) |
6de9cd9a | 714 | break; |
f6288c24 | 715 | if (cmp1 == NULL || cmp2 == NULL) |
f3e1097b | 716 | return false; |
6de9cd9a DN |
717 | } |
718 | ||
f3e1097b | 719 | return true; |
6de9cd9a DN |
720 | } |
721 | ||
b251af97 | 722 | |
e0e85e06 PT |
723 | /* Compare two typespecs, recursively if necessary. */ |
724 | ||
f3e1097b | 725 | bool |
b251af97 | 726 | gfc_compare_types (gfc_typespec *ts1, gfc_typespec *ts2) |
e0e85e06 | 727 | { |
a8b3b0b6 CR |
728 | /* See if one of the typespecs is a BT_VOID, which is what is being used |
729 | to allow the funcs like c_f_pointer to accept any pointer type. | |
730 | TODO: Possibly should narrow this to just the one typespec coming in | |
731 | that is for the formal arg, but oh well. */ | |
732 | if (ts1->type == BT_VOID || ts2->type == BT_VOID) | |
f3e1097b | 733 | return true; |
8b704316 | 734 | |
5af5f1de TK |
735 | /* Special case for our C interop types. FIXME: There should be a |
736 | better way of doing this. When ISO C binding is cleared up, | |
737 | this can probably be removed. See PR 57048. */ | |
738 | ||
739 | if (((ts1->type == BT_INTEGER && ts2->type == BT_DERIVED) | |
740 | || (ts1->type == BT_DERIVED && ts2->type == BT_INTEGER)) | |
741 | && ts1->u.derived && ts2->u.derived | |
742 | && ts1->u.derived == ts2->u.derived) | |
743 | return true; | |
744 | ||
77b7d71e AV |
745 | /* The _data component is not always present, therefore check for its |
746 | presence before assuming, that its derived->attr is available. | |
747 | When the _data component is not present, then nevertheless the | |
748 | unlimited_polymorphic flag may be set in the derived type's attr. */ | |
749 | if (ts1->type == BT_CLASS && ts1->u.derived->components | |
750 | && ((ts1->u.derived->attr.is_class | |
751 | && ts1->u.derived->components->ts.u.derived->attr | |
752 | .unlimited_polymorphic) | |
753 | || ts1->u.derived->attr.unlimited_polymorphic)) | |
f3e1097b | 754 | return true; |
8b704316 PT |
755 | |
756 | /* F2003: C717 */ | |
757 | if (ts2->type == BT_CLASS && ts1->type == BT_DERIVED | |
77b7d71e AV |
758 | && ts2->u.derived->components |
759 | && ((ts2->u.derived->attr.is_class | |
760 | && ts2->u.derived->components->ts.u.derived->attr | |
761 | .unlimited_polymorphic) | |
762 | || ts2->u.derived->attr.unlimited_polymorphic) | |
8b704316 | 763 | && (ts1->u.derived->attr.sequence || ts1->u.derived->attr.is_bind_c)) |
f3e1097b | 764 | return true; |
8b704316 | 765 | |
cf2b3c22 | 766 | if (ts1->type != ts2->type |
908b8296 FR |
767 | && ((ts1->type != BT_DERIVED && ts1->type != BT_CLASS) |
768 | || (ts2->type != BT_DERIVED && ts2->type != BT_CLASS))) | |
f3e1097b | 769 | return false; |
908b8296 FR |
770 | |
771 | if (ts1->type == BT_UNION) | |
f3e1097b | 772 | return compare_union_types (ts1->u.derived, ts2->u.derived); |
908b8296 | 773 | |
cf2b3c22 | 774 | if (ts1->type != BT_DERIVED && ts1->type != BT_CLASS) |
e0e85e06 PT |
775 | return (ts1->kind == ts2->kind); |
776 | ||
777 | /* Compare derived types. */ | |
f6288c24 | 778 | return gfc_type_compatible (ts1, ts2); |
e0e85e06 PT |
779 | } |
780 | ||
6de9cd9a | 781 | |
f3e1097b | 782 | static bool |
e7333b69 JW |
783 | compare_type (gfc_symbol *s1, gfc_symbol *s2) |
784 | { | |
785 | if (s2->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK)) | |
f3e1097b | 786 | return true; |
e7333b69 | 787 | |
0ce0e6e8 JW |
788 | return gfc_compare_types (&s1->ts, &s2->ts) || s2->ts.type == BT_ASSUMED; |
789 | } | |
790 | ||
791 | ||
792 | static bool | |
793 | compare_type_characteristics (gfc_symbol *s1, gfc_symbol *s2) | |
794 | { | |
60de1c7d TB |
795 | /* TYPE and CLASS of the same declared type are type compatible, |
796 | but have different characteristics. */ | |
797 | if ((s1->ts.type == BT_CLASS && s2->ts.type == BT_DERIVED) | |
798 | || (s1->ts.type == BT_DERIVED && s2->ts.type == BT_CLASS)) | |
f3e1097b | 799 | return false; |
60de1c7d | 800 | |
0ce0e6e8 | 801 | return compare_type (s1, s2); |
e7333b69 JW |
802 | } |
803 | ||
6de9cd9a | 804 | |
f3e1097b | 805 | static bool |
e7333b69 | 806 | compare_rank (gfc_symbol *s1, gfc_symbol *s2) |
6de9cd9a | 807 | { |
aa6590cf | 808 | gfc_array_spec *as1, *as2; |
6de9cd9a DN |
809 | int r1, r2; |
810 | ||
e7333b69 | 811 | if (s2->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK)) |
f3e1097b | 812 | return true; |
e7ac6a7c | 813 | |
75a3c61a LK |
814 | as1 = (s1->ts.type == BT_CLASS |
815 | && !s1->ts.u.derived->attr.unlimited_polymorphic) | |
816 | ? CLASS_DATA (s1)->as : s1->as; | |
817 | as2 = (s2->ts.type == BT_CLASS | |
818 | && !s2->ts.u.derived->attr.unlimited_polymorphic) | |
819 | ? CLASS_DATA (s2)->as : s2->as; | |
aa6590cf JW |
820 | |
821 | r1 = as1 ? as1->rank : 0; | |
822 | r2 = as2 ? as2->rank : 0; | |
6de9cd9a | 823 | |
e7333b69 | 824 | if (r1 != r2 && (!as2 || as2->type != AS_ASSUMED_RANK)) |
f3e1097b | 825 | return false; /* Ranks differ. */ |
6de9cd9a | 826 | |
f3e1097b | 827 | return true; |
e7333b69 JW |
828 | } |
829 | ||
830 | ||
831 | /* Given two symbols that are formal arguments, compare their ranks | |
f3e1097b JW |
832 | and types. Returns true if they have the same rank and type, |
833 | false otherwise. */ | |
e7333b69 | 834 | |
f3e1097b | 835 | static bool |
e7333b69 JW |
836 | compare_type_rank (gfc_symbol *s1, gfc_symbol *s2) |
837 | { | |
838 | return compare_type (s1, s2) && compare_rank (s1, s2); | |
6de9cd9a DN |
839 | } |
840 | ||
841 | ||
6de9cd9a DN |
842 | /* Given two symbols that are formal arguments, compare their types |
843 | and rank and their formal interfaces if they are both dummy | |
f3e1097b | 844 | procedures. Returns true if the same, false if different. */ |
6de9cd9a | 845 | |
f3e1097b | 846 | static bool |
b251af97 | 847 | compare_type_rank_if (gfc_symbol *s1, gfc_symbol *s2) |
6de9cd9a | 848 | { |
26f2ca2b | 849 | if (s1 == NULL || s2 == NULL) |
f3e1097b | 850 | return (s1 == s2); |
6de9cd9a | 851 | |
489ec4e3 | 852 | if (s1 == s2) |
f3e1097b | 853 | return true; |
489ec4e3 | 854 | |
6de9cd9a DN |
855 | if (s1->attr.flavor != FL_PROCEDURE && s2->attr.flavor != FL_PROCEDURE) |
856 | return compare_type_rank (s1, s2); | |
857 | ||
858 | if (s1->attr.flavor != FL_PROCEDURE || s2->attr.flavor != FL_PROCEDURE) | |
f3e1097b | 859 | return false; |
6de9cd9a | 860 | |
489ec4e3 PT |
861 | /* At this point, both symbols are procedures. It can happen that |
862 | external procedures are compared, where one is identified by usage | |
863 | to be a function or subroutine but the other is not. Check TKR | |
864 | nonetheless for these cases. */ | |
865 | if (s1->attr.function == 0 && s1->attr.subroutine == 0) | |
f3e1097b | 866 | return s1->attr.external ? compare_type_rank (s1, s2) : false; |
489ec4e3 PT |
867 | |
868 | if (s2->attr.function == 0 && s2->attr.subroutine == 0) | |
f3e1097b | 869 | return s2->attr.external ? compare_type_rank (s1, s2) : false; |
6de9cd9a | 870 | |
489ec4e3 | 871 | /* Now the type of procedure has been identified. */ |
6de9cd9a DN |
872 | if (s1->attr.function != s2->attr.function |
873 | || s1->attr.subroutine != s2->attr.subroutine) | |
f3e1097b | 874 | return false; |
6de9cd9a | 875 | |
f3e1097b JW |
876 | if (s1->attr.function && !compare_type_rank (s1, s2)) |
877 | return false; | |
6de9cd9a | 878 | |
993ef28f PT |
879 | /* Originally, gfortran recursed here to check the interfaces of passed |
880 | procedures. This is explicitly not required by the standard. */ | |
f3e1097b | 881 | return true; |
6de9cd9a DN |
882 | } |
883 | ||
884 | ||
885 | /* Given a formal argument list and a keyword name, search the list | |
886 | for that keyword. Returns the correct symbol node if found, NULL | |
887 | if not found. */ | |
888 | ||
889 | static gfc_symbol * | |
b251af97 | 890 | find_keyword_arg (const char *name, gfc_formal_arglist *f) |
6de9cd9a | 891 | { |
6de9cd9a DN |
892 | for (; f; f = f->next) |
893 | if (strcmp (f->sym->name, name) == 0) | |
894 | return f->sym; | |
895 | ||
896 | return NULL; | |
897 | } | |
898 | ||
899 | ||
900 | /******** Interface checking subroutines **********/ | |
901 | ||
902 | ||
903 | /* Given an operator interface and the operator, make sure that all | |
904 | interfaces for that operator are legal. */ | |
905 | ||
94747289 DK |
906 | bool |
907 | gfc_check_operator_interface (gfc_symbol *sym, gfc_intrinsic_op op, | |
908 | locus opwhere) | |
6de9cd9a DN |
909 | { |
910 | gfc_formal_arglist *formal; | |
911 | sym_intent i1, i2; | |
6de9cd9a | 912 | bt t1, t2; |
27189292 | 913 | int args, r1, r2, k1, k2; |
6de9cd9a | 914 | |
94747289 | 915 | gcc_assert (sym); |
6de9cd9a DN |
916 | |
917 | args = 0; | |
918 | t1 = t2 = BT_UNKNOWN; | |
919 | i1 = i2 = INTENT_UNKNOWN; | |
27189292 FXC |
920 | r1 = r2 = -1; |
921 | k1 = k2 = -1; | |
6de9cd9a | 922 | |
4cbc9039 | 923 | for (formal = gfc_sym_get_dummy_args (sym); formal; formal = formal->next) |
6de9cd9a | 924 | { |
94747289 DK |
925 | gfc_symbol *fsym = formal->sym; |
926 | if (fsym == NULL) | |
8c086c9c PT |
927 | { |
928 | gfc_error ("Alternate return cannot appear in operator " | |
94747289 DK |
929 | "interface at %L", &sym->declared_at); |
930 | return false; | |
8c086c9c | 931 | } |
6de9cd9a DN |
932 | if (args == 0) |
933 | { | |
94747289 DK |
934 | t1 = fsym->ts.type; |
935 | i1 = fsym->attr.intent; | |
936 | r1 = (fsym->as != NULL) ? fsym->as->rank : 0; | |
937 | k1 = fsym->ts.kind; | |
6de9cd9a DN |
938 | } |
939 | if (args == 1) | |
940 | { | |
94747289 DK |
941 | t2 = fsym->ts.type; |
942 | i2 = fsym->attr.intent; | |
943 | r2 = (fsym->as != NULL) ? fsym->as->rank : 0; | |
944 | k2 = fsym->ts.kind; | |
6de9cd9a DN |
945 | } |
946 | args++; | |
947 | } | |
948 | ||
27189292 FXC |
949 | /* Only +, - and .not. can be unary operators. |
950 | .not. cannot be a binary operator. */ | |
a1ee985f KG |
951 | if (args == 0 || args > 2 || (args == 1 && op != INTRINSIC_PLUS |
952 | && op != INTRINSIC_MINUS | |
953 | && op != INTRINSIC_NOT) | |
954 | || (args == 2 && op == INTRINSIC_NOT)) | |
27189292 | 955 | { |
efb63364 TB |
956 | if (op == INTRINSIC_ASSIGN) |
957 | gfc_error ("Assignment operator interface at %L must have " | |
958 | "two arguments", &sym->declared_at); | |
959 | else | |
960 | gfc_error ("Operator interface at %L has the wrong number of arguments", | |
961 | &sym->declared_at); | |
94747289 | 962 | return false; |
27189292 FXC |
963 | } |
964 | ||
965 | /* Check that intrinsics are mapped to functions, except | |
966 | INTRINSIC_ASSIGN which should map to a subroutine. */ | |
a1ee985f | 967 | if (op == INTRINSIC_ASSIGN) |
6de9cd9a | 968 | { |
4cbc9039 JW |
969 | gfc_formal_arglist *dummy_args; |
970 | ||
6de9cd9a DN |
971 | if (!sym->attr.subroutine) |
972 | { | |
b251af97 | 973 | gfc_error ("Assignment operator interface at %L must be " |
94747289 DK |
974 | "a SUBROUTINE", &sym->declared_at); |
975 | return false; | |
6de9cd9a | 976 | } |
e19bb186 TB |
977 | |
978 | /* Allowed are (per F2003, 12.3.2.1.2 Defined assignments): | |
94747289 | 979 | - First argument an array with different rank than second, |
315d905f TB |
980 | - First argument is a scalar and second an array, |
981 | - Types and kinds do not conform, or | |
94747289 | 982 | - First argument is of derived type. */ |
4cbc9039 JW |
983 | dummy_args = gfc_sym_get_dummy_args (sym); |
984 | if (dummy_args->sym->ts.type != BT_DERIVED | |
985 | && dummy_args->sym->ts.type != BT_CLASS | |
315d905f | 986 | && (r2 == 0 || r1 == r2) |
4cbc9039 JW |
987 | && (dummy_args->sym->ts.type == dummy_args->next->sym->ts.type |
988 | || (gfc_numeric_ts (&dummy_args->sym->ts) | |
989 | && gfc_numeric_ts (&dummy_args->next->sym->ts)))) | |
8c086c9c | 990 | { |
b251af97 | 991 | gfc_error ("Assignment operator interface at %L must not redefine " |
94747289 DK |
992 | "an INTRINSIC type assignment", &sym->declared_at); |
993 | return false; | |
8c086c9c | 994 | } |
6de9cd9a DN |
995 | } |
996 | else | |
997 | { | |
998 | if (!sym->attr.function) | |
999 | { | |
1000 | gfc_error ("Intrinsic operator interface at %L must be a FUNCTION", | |
94747289 DK |
1001 | &sym->declared_at); |
1002 | return false; | |
6de9cd9a DN |
1003 | } |
1004 | } | |
1005 | ||
27189292 | 1006 | /* Check intents on operator interfaces. */ |
a1ee985f | 1007 | if (op == INTRINSIC_ASSIGN) |
6de9cd9a | 1008 | { |
27189292 | 1009 | if (i1 != INTENT_OUT && i1 != INTENT_INOUT) |
94747289 DK |
1010 | { |
1011 | gfc_error ("First argument of defined assignment at %L must be " | |
1012 | "INTENT(OUT) or INTENT(INOUT)", &sym->declared_at); | |
1013 | return false; | |
1014 | } | |
27189292 FXC |
1015 | |
1016 | if (i2 != INTENT_IN) | |
94747289 DK |
1017 | { |
1018 | gfc_error ("Second argument of defined assignment at %L must be " | |
1019 | "INTENT(IN)", &sym->declared_at); | |
1020 | return false; | |
1021 | } | |
27189292 FXC |
1022 | } |
1023 | else | |
1024 | { | |
1025 | if (i1 != INTENT_IN) | |
94747289 DK |
1026 | { |
1027 | gfc_error ("First argument of operator interface at %L must be " | |
1028 | "INTENT(IN)", &sym->declared_at); | |
1029 | return false; | |
1030 | } | |
27189292 FXC |
1031 | |
1032 | if (args == 2 && i2 != INTENT_IN) | |
94747289 DK |
1033 | { |
1034 | gfc_error ("Second argument of operator interface at %L must be " | |
1035 | "INTENT(IN)", &sym->declared_at); | |
1036 | return false; | |
1037 | } | |
27189292 FXC |
1038 | } |
1039 | ||
1040 | /* From now on, all we have to do is check that the operator definition | |
1041 | doesn't conflict with an intrinsic operator. The rules for this | |
1042 | game are defined in 7.1.2 and 7.1.3 of both F95 and F2003 standards, | |
1043 | as well as 12.3.2.1.1 of Fortran 2003: | |
1044 | ||
1045 | "If the operator is an intrinsic-operator (R310), the number of | |
1046 | function arguments shall be consistent with the intrinsic uses of | |
1047 | that operator, and the types, kind type parameters, or ranks of the | |
1048 | dummy arguments shall differ from those required for the intrinsic | |
1049 | operation (7.1.2)." */ | |
1050 | ||
1051 | #define IS_NUMERIC_TYPE(t) \ | |
1052 | ((t) == BT_INTEGER || (t) == BT_REAL || (t) == BT_COMPLEX) | |
1053 | ||
1054 | /* Unary ops are easy, do them first. */ | |
a1ee985f | 1055 | if (op == INTRINSIC_NOT) |
27189292 FXC |
1056 | { |
1057 | if (t1 == BT_LOGICAL) | |
6de9cd9a | 1058 | goto bad_repl; |
27189292 | 1059 | else |
94747289 | 1060 | return true; |
27189292 | 1061 | } |
6de9cd9a | 1062 | |
a1ee985f | 1063 | if (args == 1 && (op == INTRINSIC_PLUS || op == INTRINSIC_MINUS)) |
27189292 FXC |
1064 | { |
1065 | if (IS_NUMERIC_TYPE (t1)) | |
6de9cd9a | 1066 | goto bad_repl; |
27189292 | 1067 | else |
94747289 | 1068 | return true; |
27189292 | 1069 | } |
6de9cd9a | 1070 | |
27189292 FXC |
1071 | /* Character intrinsic operators have same character kind, thus |
1072 | operator definitions with operands of different character kinds | |
1073 | are always safe. */ | |
1074 | if (t1 == BT_CHARACTER && t2 == BT_CHARACTER && k1 != k2) | |
94747289 | 1075 | return true; |
6de9cd9a | 1076 | |
27189292 FXC |
1077 | /* Intrinsic operators always perform on arguments of same rank, |
1078 | so different ranks is also always safe. (rank == 0) is an exception | |
1079 | to that, because all intrinsic operators are elemental. */ | |
1080 | if (r1 != r2 && r1 != 0 && r2 != 0) | |
94747289 | 1081 | return true; |
6de9cd9a | 1082 | |
a1ee985f | 1083 | switch (op) |
27189292 | 1084 | { |
6de9cd9a | 1085 | case INTRINSIC_EQ: |
3bed9dd0 | 1086 | case INTRINSIC_EQ_OS: |
6de9cd9a | 1087 | case INTRINSIC_NE: |
3bed9dd0 | 1088 | case INTRINSIC_NE_OS: |
27189292 | 1089 | if (t1 == BT_CHARACTER && t2 == BT_CHARACTER) |
6de9cd9a | 1090 | goto bad_repl; |
27189292 | 1091 | /* Fall through. */ |
6de9cd9a | 1092 | |
27189292 FXC |
1093 | case INTRINSIC_PLUS: |
1094 | case INTRINSIC_MINUS: | |
1095 | case INTRINSIC_TIMES: | |
1096 | case INTRINSIC_DIVIDE: | |
1097 | case INTRINSIC_POWER: | |
1098 | if (IS_NUMERIC_TYPE (t1) && IS_NUMERIC_TYPE (t2)) | |
1099 | goto bad_repl; | |
6de9cd9a DN |
1100 | break; |
1101 | ||
6de9cd9a | 1102 | case INTRINSIC_GT: |
3bed9dd0 | 1103 | case INTRINSIC_GT_OS: |
27189292 | 1104 | case INTRINSIC_GE: |
3bed9dd0 | 1105 | case INTRINSIC_GE_OS: |
27189292 | 1106 | case INTRINSIC_LT: |
3bed9dd0 | 1107 | case INTRINSIC_LT_OS: |
27189292 | 1108 | case INTRINSIC_LE: |
3bed9dd0 | 1109 | case INTRINSIC_LE_OS: |
27189292 FXC |
1110 | if (t1 == BT_CHARACTER && t2 == BT_CHARACTER) |
1111 | goto bad_repl; | |
6de9cd9a DN |
1112 | if ((t1 == BT_INTEGER || t1 == BT_REAL) |
1113 | && (t2 == BT_INTEGER || t2 == BT_REAL)) | |
1114 | goto bad_repl; | |
27189292 | 1115 | break; |
6de9cd9a | 1116 | |
27189292 FXC |
1117 | case INTRINSIC_CONCAT: |
1118 | if (t1 == BT_CHARACTER && t2 == BT_CHARACTER) | |
1119 | goto bad_repl; | |
6de9cd9a DN |
1120 | break; |
1121 | ||
6de9cd9a | 1122 | case INTRINSIC_AND: |
27189292 | 1123 | case INTRINSIC_OR: |
6de9cd9a DN |
1124 | case INTRINSIC_EQV: |
1125 | case INTRINSIC_NEQV: | |
6de9cd9a DN |
1126 | if (t1 == BT_LOGICAL && t2 == BT_LOGICAL) |
1127 | goto bad_repl; | |
1128 | break; | |
1129 | ||
6de9cd9a | 1130 | default: |
27189292 FXC |
1131 | break; |
1132 | } | |
6de9cd9a | 1133 | |
94747289 | 1134 | return true; |
6de9cd9a | 1135 | |
27189292 FXC |
1136 | #undef IS_NUMERIC_TYPE |
1137 | ||
6de9cd9a DN |
1138 | bad_repl: |
1139 | gfc_error ("Operator interface at %L conflicts with intrinsic interface", | |
94747289 DK |
1140 | &opwhere); |
1141 | return false; | |
6de9cd9a DN |
1142 | } |
1143 | ||
1144 | ||
1145 | /* Given a pair of formal argument lists, we see if the two lists can | |
1146 | be distinguished by counting the number of nonoptional arguments of | |
1147 | a given type/rank in f1 and seeing if there are less then that | |
1148 | number of those arguments in f2 (including optional arguments). | |
1149 | Since this test is asymmetric, it has to be called twice to make it | |
6f3ab30d JW |
1150 | symmetric. Returns nonzero if the argument lists are incompatible |
1151 | by this test. This subroutine implements rule 1 of section F03:16.2.3. | |
1152 | 'p1' and 'p2' are the PASS arguments of both procedures (if applicable). */ | |
6de9cd9a | 1153 | |
f3e1097b | 1154 | static bool |
6f3ab30d JW |
1155 | count_types_test (gfc_formal_arglist *f1, gfc_formal_arglist *f2, |
1156 | const char *p1, const char *p2) | |
6de9cd9a | 1157 | { |
f3e1097b | 1158 | int ac1, ac2, i, j, k, n1; |
6de9cd9a DN |
1159 | gfc_formal_arglist *f; |
1160 | ||
1161 | typedef struct | |
1162 | { | |
1163 | int flag; | |
1164 | gfc_symbol *sym; | |
1165 | } | |
1166 | arginfo; | |
1167 | ||
1168 | arginfo *arg; | |
1169 | ||
1170 | n1 = 0; | |
1171 | ||
1172 | for (f = f1; f; f = f->next) | |
1173 | n1++; | |
1174 | ||
1175 | /* Build an array of integers that gives the same integer to | |
1176 | arguments of the same type/rank. */ | |
ece3f663 | 1177 | arg = XCNEWVEC (arginfo, n1); |
6de9cd9a DN |
1178 | |
1179 | f = f1; | |
1180 | for (i = 0; i < n1; i++, f = f->next) | |
1181 | { | |
1182 | arg[i].flag = -1; | |
1183 | arg[i].sym = f->sym; | |
1184 | } | |
1185 | ||
1186 | k = 0; | |
1187 | ||
1188 | for (i = 0; i < n1; i++) | |
1189 | { | |
1190 | if (arg[i].flag != -1) | |
1191 | continue; | |
1192 | ||
6f3ab30d JW |
1193 | if (arg[i].sym && (arg[i].sym->attr.optional |
1194 | || (p1 && strcmp (arg[i].sym->name, p1) == 0))) | |
1195 | continue; /* Skip OPTIONAL and PASS arguments. */ | |
6de9cd9a DN |
1196 | |
1197 | arg[i].flag = k; | |
1198 | ||
6f3ab30d | 1199 | /* Find other non-optional, non-pass arguments of the same type/rank. */ |
6de9cd9a | 1200 | for (j = i + 1; j < n1; j++) |
6f3ab30d JW |
1201 | if ((arg[j].sym == NULL |
1202 | || !(arg[j].sym->attr.optional | |
1203 | || (p1 && strcmp (arg[j].sym->name, p1) == 0))) | |
2b603773 JW |
1204 | && (compare_type_rank_if (arg[i].sym, arg[j].sym) |
1205 | || compare_type_rank_if (arg[j].sym, arg[i].sym))) | |
6de9cd9a DN |
1206 | arg[j].flag = k; |
1207 | ||
1208 | k++; | |
1209 | } | |
1210 | ||
1211 | /* Now loop over each distinct type found in f1. */ | |
1212 | k = 0; | |
f3e1097b | 1213 | bool rc = false; |
6de9cd9a DN |
1214 | |
1215 | for (i = 0; i < n1; i++) | |
1216 | { | |
1217 | if (arg[i].flag != k) | |
1218 | continue; | |
1219 | ||
1220 | ac1 = 1; | |
1221 | for (j = i + 1; j < n1; j++) | |
1222 | if (arg[j].flag == k) | |
1223 | ac1++; | |
1224 | ||
6f3ab30d JW |
1225 | /* Count the number of non-pass arguments in f2 with that type, |
1226 | including those that are optional. */ | |
6de9cd9a DN |
1227 | ac2 = 0; |
1228 | ||
1229 | for (f = f2; f; f = f->next) | |
6f3ab30d JW |
1230 | if ((!p2 || strcmp (f->sym->name, p2) != 0) |
1231 | && (compare_type_rank_if (arg[i].sym, f->sym) | |
1232 | || compare_type_rank_if (f->sym, arg[i].sym))) | |
6de9cd9a DN |
1233 | ac2++; |
1234 | ||
1235 | if (ac1 > ac2) | |
1236 | { | |
f3e1097b | 1237 | rc = true; |
6de9cd9a DN |
1238 | break; |
1239 | } | |
1240 | ||
1241 | k++; | |
1242 | } | |
1243 | ||
cede9502 | 1244 | free (arg); |
6de9cd9a DN |
1245 | |
1246 | return rc; | |
1247 | } | |
1248 | ||
1249 | ||
c7927c3b JW |
1250 | /* Returns true if two dummy arguments are distinguishable due to their POINTER |
1251 | and ALLOCATABLE attributes according to F2018 section 15.4.3.4.5 (3). | |
1252 | The function is asymmetric wrt to the arguments s1 and s2 and should always | |
1253 | be called twice (with flipped arguments in the second call). */ | |
1254 | ||
1255 | static bool | |
1256 | compare_ptr_alloc(gfc_symbol *s1, gfc_symbol *s2) | |
1257 | { | |
1258 | /* Is s1 allocatable? */ | |
1259 | const bool a1 = s1->ts.type == BT_CLASS ? | |
1260 | CLASS_DATA(s1)->attr.allocatable : s1->attr.allocatable; | |
1261 | /* Is s2 a pointer? */ | |
1262 | const bool p2 = s2->ts.type == BT_CLASS ? | |
1263 | CLASS_DATA(s2)->attr.class_pointer : s2->attr.pointer; | |
1264 | return a1 && p2 && (s2->attr.intent != INTENT_IN); | |
1265 | } | |
1266 | ||
1267 | ||
e9355cc3 JW |
1268 | /* Perform the correspondence test in rule (3) of F08:C1215. |
1269 | Returns zero if no argument is found that satisfies this rule, | |
1270 | nonzero otherwise. 'p1' and 'p2' are the PASS arguments of both procedures | |
6f3ab30d | 1271 | (if applicable). |
6de9cd9a DN |
1272 | |
1273 | This test is also not symmetric in f1 and f2 and must be called | |
1274 | twice. This test finds problems caused by sorting the actual | |
1275 | argument list with keywords. For example: | |
1276 | ||
1277 | INTERFACE FOO | |
e9355cc3 JW |
1278 | SUBROUTINE F1(A, B) |
1279 | INTEGER :: A ; REAL :: B | |
1280 | END SUBROUTINE F1 | |
6de9cd9a | 1281 | |
e9355cc3 JW |
1282 | SUBROUTINE F2(B, A) |
1283 | INTEGER :: A ; REAL :: B | |
1284 | END SUBROUTINE F1 | |
6de9cd9a DN |
1285 | END INTERFACE FOO |
1286 | ||
1287 | At this point, 'CALL FOO(A=1, B=1.0)' is ambiguous. */ | |
1288 | ||
f3e1097b | 1289 | static bool |
6f3ab30d JW |
1290 | generic_correspondence (gfc_formal_arglist *f1, gfc_formal_arglist *f2, |
1291 | const char *p1, const char *p2) | |
6de9cd9a | 1292 | { |
6de9cd9a DN |
1293 | gfc_formal_arglist *f2_save, *g; |
1294 | gfc_symbol *sym; | |
1295 | ||
1296 | f2_save = f2; | |
1297 | ||
1298 | while (f1) | |
1299 | { | |
8f8ea4a4 | 1300 | if (!f1->sym || f1->sym->attr.optional) |
6de9cd9a DN |
1301 | goto next; |
1302 | ||
6f3ab30d JW |
1303 | if (p1 && strcmp (f1->sym->name, p1) == 0) |
1304 | f1 = f1->next; | |
1305 | if (f2 && p2 && strcmp (f2->sym->name, p2) == 0) | |
1306 | f2 = f2->next; | |
1307 | ||
2b603773 | 1308 | if (f2 != NULL && (compare_type_rank (f1->sym, f2->sym) |
e9355cc3 JW |
1309 | || compare_type_rank (f2->sym, f1->sym)) |
1310 | && !((gfc_option.allow_std & GFC_STD_F2008) | |
c7927c3b JW |
1311 | && (compare_ptr_alloc(f1->sym, f2->sym) |
1312 | || compare_ptr_alloc(f2->sym, f1->sym)))) | |
6de9cd9a DN |
1313 | goto next; |
1314 | ||
1315 | /* Now search for a disambiguating keyword argument starting at | |
b251af97 | 1316 | the current non-match. */ |
6de9cd9a DN |
1317 | for (g = f1; g; g = g->next) |
1318 | { | |
6f3ab30d | 1319 | if (g->sym->attr.optional || (p1 && strcmp (g->sym->name, p1) == 0)) |
6de9cd9a DN |
1320 | continue; |
1321 | ||
1322 | sym = find_keyword_arg (g->sym->name, f2_save); | |
e9355cc3 JW |
1323 | if (sym == NULL || !compare_type_rank (g->sym, sym) |
1324 | || ((gfc_option.allow_std & GFC_STD_F2008) | |
c7927c3b JW |
1325 | && (compare_ptr_alloc(sym, g->sym) |
1326 | || compare_ptr_alloc(g->sym, sym)))) | |
f3e1097b | 1327 | return true; |
6de9cd9a DN |
1328 | } |
1329 | ||
1330 | next: | |
6f3ab30d JW |
1331 | if (f1 != NULL) |
1332 | f1 = f1->next; | |
6de9cd9a DN |
1333 | if (f2 != NULL) |
1334 | f2 = f2->next; | |
1335 | } | |
1336 | ||
f3e1097b | 1337 | return false; |
6de9cd9a DN |
1338 | } |
1339 | ||
1340 | ||
e7333b69 JW |
1341 | static int |
1342 | symbol_rank (gfc_symbol *sym) | |
1343 | { | |
1fb84d5b SK |
1344 | gfc_array_spec *as = NULL; |
1345 | ||
f11600c9 | 1346 | if (sym->ts.type == BT_CLASS && CLASS_DATA (sym)) |
1fb84d5b SK |
1347 | as = CLASS_DATA (sym)->as; |
1348 | else | |
1349 | as = sym->as; | |
1350 | ||
e7333b69 JW |
1351 | return as ? as->rank : 0; |
1352 | } | |
1353 | ||
1354 | ||
9795c594 JW |
1355 | /* Check if the characteristics of two dummy arguments match, |
1356 | cf. F08:12.3.2. */ | |
1357 | ||
4668d6f9 PT |
1358 | bool |
1359 | gfc_check_dummy_characteristics (gfc_symbol *s1, gfc_symbol *s2, | |
1360 | bool type_must_agree, char *errmsg, | |
1361 | int err_len) | |
9795c594 | 1362 | { |
9362a03b | 1363 | if (s1 == NULL || s2 == NULL) |
524af0d6 | 1364 | return s1 == s2 ? true : false; |
9362a03b | 1365 | |
8f72249f SK |
1366 | if (s1->attr.proc == PROC_ST_FUNCTION || s2->attr.proc == PROC_ST_FUNCTION) |
1367 | { | |
1368 | strncpy (errmsg, "Statement function", err_len); | |
1369 | return false; | |
1370 | } | |
1371 | ||
9795c594 | 1372 | /* Check type and rank. */ |
e7333b69 | 1373 | if (type_must_agree) |
9795c594 | 1374 | { |
0ce0e6e8 JW |
1375 | if (!compare_type_characteristics (s1, s2) |
1376 | || !compare_type_characteristics (s2, s1)) | |
e7333b69 JW |
1377 | { |
1378 | snprintf (errmsg, err_len, "Type mismatch in argument '%s' (%s/%s)", | |
f61e54e5 ME |
1379 | s1->name, gfc_dummy_typename (&s1->ts), |
1380 | gfc_dummy_typename (&s2->ts)); | |
e7333b69 JW |
1381 | return false; |
1382 | } | |
1383 | if (!compare_rank (s1, s2)) | |
1384 | { | |
1385 | snprintf (errmsg, err_len, "Rank mismatch in argument '%s' (%i/%i)", | |
1386 | s1->name, symbol_rank (s1), symbol_rank (s2)); | |
1387 | return false; | |
1388 | } | |
9795c594 JW |
1389 | } |
1390 | ||
1391 | /* Check INTENT. */ | |
90efb251 TK |
1392 | if (s1->attr.intent != s2->attr.intent && !s1->attr.artificial |
1393 | && !s2->attr.artificial) | |
9795c594 JW |
1394 | { |
1395 | snprintf (errmsg, err_len, "INTENT mismatch in argument '%s'", | |
1396 | s1->name); | |
524af0d6 | 1397 | return false; |
9795c594 JW |
1398 | } |
1399 | ||
1400 | /* Check OPTIONAL attribute. */ | |
1401 | if (s1->attr.optional != s2->attr.optional) | |
1402 | { | |
1403 | snprintf (errmsg, err_len, "OPTIONAL mismatch in argument '%s'", | |
1404 | s1->name); | |
524af0d6 | 1405 | return false; |
9795c594 JW |
1406 | } |
1407 | ||
1408 | /* Check ALLOCATABLE attribute. */ | |
1409 | if (s1->attr.allocatable != s2->attr.allocatable) | |
1410 | { | |
1411 | snprintf (errmsg, err_len, "ALLOCATABLE mismatch in argument '%s'", | |
1412 | s1->name); | |
524af0d6 | 1413 | return false; |
9795c594 JW |
1414 | } |
1415 | ||
1416 | /* Check POINTER attribute. */ | |
1417 | if (s1->attr.pointer != s2->attr.pointer) | |
1418 | { | |
1419 | snprintf (errmsg, err_len, "POINTER mismatch in argument '%s'", | |
1420 | s1->name); | |
524af0d6 | 1421 | return false; |
9795c594 JW |
1422 | } |
1423 | ||
1424 | /* Check TARGET attribute. */ | |
1425 | if (s1->attr.target != s2->attr.target) | |
1426 | { | |
1427 | snprintf (errmsg, err_len, "TARGET mismatch in argument '%s'", | |
1428 | s1->name); | |
524af0d6 | 1429 | return false; |
9795c594 JW |
1430 | } |
1431 | ||
688974a3 JW |
1432 | /* Check ASYNCHRONOUS attribute. */ |
1433 | if (s1->attr.asynchronous != s2->attr.asynchronous) | |
1434 | { | |
1435 | snprintf (errmsg, err_len, "ASYNCHRONOUS mismatch in argument '%s'", | |
1436 | s1->name); | |
1437 | return false; | |
1438 | } | |
1439 | ||
1440 | /* Check CONTIGUOUS attribute. */ | |
1441 | if (s1->attr.contiguous != s2->attr.contiguous) | |
1442 | { | |
1443 | snprintf (errmsg, err_len, "CONTIGUOUS mismatch in argument '%s'", | |
1444 | s1->name); | |
1445 | return false; | |
1446 | } | |
1447 | ||
1448 | /* Check VALUE attribute. */ | |
1449 | if (s1->attr.value != s2->attr.value) | |
1450 | { | |
1451 | snprintf (errmsg, err_len, "VALUE mismatch in argument '%s'", | |
1452 | s1->name); | |
1453 | return false; | |
1454 | } | |
1455 | ||
1456 | /* Check VOLATILE attribute. */ | |
1457 | if (s1->attr.volatile_ != s2->attr.volatile_) | |
1458 | { | |
1459 | snprintf (errmsg, err_len, "VOLATILE mismatch in argument '%s'", | |
1460 | s1->name); | |
1461 | return false; | |
1462 | } | |
9795c594 | 1463 | |
f2f8171f JW |
1464 | /* Check interface of dummy procedures. */ |
1465 | if (s1->attr.flavor == FL_PROCEDURE) | |
1466 | { | |
1467 | char err[200]; | |
1468 | if (!gfc_compare_interfaces (s1, s2, s2->name, 0, 1, err, sizeof(err), | |
1469 | NULL, NULL)) | |
1470 | { | |
1471 | snprintf (errmsg, err_len, "Interface mismatch in dummy procedure " | |
1472 | "'%s': %s", s1->name, err); | |
524af0d6 | 1473 | return false; |
f2f8171f JW |
1474 | } |
1475 | } | |
1476 | ||
9795c594 JW |
1477 | /* Check string length. */ |
1478 | if (s1->ts.type == BT_CHARACTER | |
1479 | && s1->ts.u.cl && s1->ts.u.cl->length | |
1480 | && s2->ts.u.cl && s2->ts.u.cl->length) | |
1481 | { | |
1482 | int compval = gfc_dep_compare_expr (s1->ts.u.cl->length, | |
1483 | s2->ts.u.cl->length); | |
1484 | switch (compval) | |
1485 | { | |
1486 | case -1: | |
1487 | case 1: | |
1488 | case -3: | |
1489 | snprintf (errmsg, err_len, "Character length mismatch " | |
1490 | "in argument '%s'", s1->name); | |
524af0d6 | 1491 | return false; |
9795c594 JW |
1492 | |
1493 | case -2: | |
1494 | /* FIXME: Implement a warning for this case. | |
db30e21c | 1495 | gfc_warning (0, "Possible character length mismatch in argument %qs", |
9795c594 JW |
1496 | s1->name);*/ |
1497 | break; | |
1498 | ||
1499 | case 0: | |
1500 | break; | |
1501 | ||
1502 | default: | |
1503 | gfc_internal_error ("check_dummy_characteristics: Unexpected result " | |
1504 | "%i of gfc_dep_compare_expr", compval); | |
1505 | break; | |
1506 | } | |
1507 | } | |
1508 | ||
1509 | /* Check array shape. */ | |
1510 | if (s1->as && s2->as) | |
1511 | { | |
97f26732 JW |
1512 | int i, compval; |
1513 | gfc_expr *shape1, *shape2; | |
1514 | ||
a5baf71b PT |
1515 | /* Sometimes the ambiguity between deferred shape and assumed shape |
1516 | does not get resolved in module procedures, where the only explicit | |
1517 | declaration of the dummy is in the interface. */ | |
1518 | if (s1->ns->proc_name && s1->ns->proc_name->attr.module_procedure | |
1519 | && s1->as->type == AS_ASSUMED_SHAPE | |
1520 | && s2->as->type == AS_DEFERRED) | |
1521 | { | |
1522 | s2->as->type = AS_ASSUMED_SHAPE; | |
1523 | for (i = 0; i < s2->as->rank; i++) | |
1524 | if (s1->as->lower[i] != NULL) | |
1525 | s2->as->lower[i] = gfc_copy_expr (s1->as->lower[i]); | |
1526 | } | |
1527 | ||
9795c594 JW |
1528 | if (s1->as->type != s2->as->type) |
1529 | { | |
1530 | snprintf (errmsg, err_len, "Shape mismatch in argument '%s'", | |
1531 | s1->name); | |
524af0d6 | 1532 | return false; |
9795c594 | 1533 | } |
97f26732 | 1534 | |
b25affbd TB |
1535 | if (s1->as->corank != s2->as->corank) |
1536 | { | |
1537 | snprintf (errmsg, err_len, "Corank mismatch in argument '%s' (%i/%i)", | |
1538 | s1->name, s1->as->corank, s2->as->corank); | |
1539 | return false; | |
1540 | } | |
1541 | ||
97f26732 | 1542 | if (s1->as->type == AS_EXPLICIT) |
47da0bf6 | 1543 | for (i = 0; i < s1->as->rank + MAX (0, s1->as->corank-1); i++) |
97f26732 JW |
1544 | { |
1545 | shape1 = gfc_subtract (gfc_copy_expr (s1->as->upper[i]), | |
1546 | gfc_copy_expr (s1->as->lower[i])); | |
1547 | shape2 = gfc_subtract (gfc_copy_expr (s2->as->upper[i]), | |
1548 | gfc_copy_expr (s2->as->lower[i])); | |
1549 | compval = gfc_dep_compare_expr (shape1, shape2); | |
1550 | gfc_free_expr (shape1); | |
1551 | gfc_free_expr (shape2); | |
1552 | switch (compval) | |
1553 | { | |
1554 | case -1: | |
1555 | case 1: | |
1556 | case -3: | |
b25affbd TB |
1557 | if (i < s1->as->rank) |
1558 | snprintf (errmsg, err_len, "Shape mismatch in dimension %i of" | |
1559 | " argument '%s'", i + 1, s1->name); | |
1560 | else | |
1561 | snprintf (errmsg, err_len, "Shape mismatch in codimension %i " | |
1562 | "of argument '%s'", i - s1->as->rank + 1, s1->name); | |
524af0d6 | 1563 | return false; |
97f26732 JW |
1564 | |
1565 | case -2: | |
1566 | /* FIXME: Implement a warning for this case. | |
db30e21c | 1567 | gfc_warning (0, "Possible shape mismatch in argument %qs", |
97f26732 JW |
1568 | s1->name);*/ |
1569 | break; | |
1570 | ||
1571 | case 0: | |
1572 | break; | |
1573 | ||
1574 | default: | |
1575 | gfc_internal_error ("check_dummy_characteristics: Unexpected " | |
1576 | "result %i of gfc_dep_compare_expr", | |
1577 | compval); | |
1578 | break; | |
1579 | } | |
1580 | } | |
9795c594 | 1581 | } |
8b704316 | 1582 | |
524af0d6 | 1583 | return true; |
9795c594 JW |
1584 | } |
1585 | ||
1586 | ||
edc802c7 JW |
1587 | /* Check if the characteristics of two function results match, |
1588 | cf. F08:12.3.3. */ | |
1589 | ||
4668d6f9 PT |
1590 | bool |
1591 | gfc_check_result_characteristics (gfc_symbol *s1, gfc_symbol *s2, | |
2298af08 | 1592 | char *errmsg, int err_len) |
edc802c7 JW |
1593 | { |
1594 | gfc_symbol *r1, *r2; | |
1595 | ||
82b541a1 JW |
1596 | if (s1->ts.interface && s1->ts.interface->result) |
1597 | r1 = s1->ts.interface->result; | |
1598 | else | |
1599 | r1 = s1->result ? s1->result : s1; | |
1600 | ||
1601 | if (s2->ts.interface && s2->ts.interface->result) | |
1602 | r2 = s2->ts.interface->result; | |
1603 | else | |
1604 | r2 = s2->result ? s2->result : s2; | |
edc802c7 JW |
1605 | |
1606 | if (r1->ts.type == BT_UNKNOWN) | |
524af0d6 | 1607 | return true; |
edc802c7 JW |
1608 | |
1609 | /* Check type and rank. */ | |
0ce0e6e8 | 1610 | if (!compare_type_characteristics (r1, r2)) |
edc802c7 | 1611 | { |
e7333b69 JW |
1612 | snprintf (errmsg, err_len, "Type mismatch in function result (%s/%s)", |
1613 | gfc_typename (&r1->ts), gfc_typename (&r2->ts)); | |
1614 | return false; | |
1615 | } | |
1616 | if (!compare_rank (r1, r2)) | |
1617 | { | |
1618 | snprintf (errmsg, err_len, "Rank mismatch in function result (%i/%i)", | |
1619 | symbol_rank (r1), symbol_rank (r2)); | |
524af0d6 | 1620 | return false; |
edc802c7 JW |
1621 | } |
1622 | ||
1623 | /* Check ALLOCATABLE attribute. */ | |
1624 | if (r1->attr.allocatable != r2->attr.allocatable) | |
1625 | { | |
1626 | snprintf (errmsg, err_len, "ALLOCATABLE attribute mismatch in " | |
1627 | "function result"); | |
524af0d6 | 1628 | return false; |
edc802c7 JW |
1629 | } |
1630 | ||
1631 | /* Check POINTER attribute. */ | |
1632 | if (r1->attr.pointer != r2->attr.pointer) | |
1633 | { | |
1634 | snprintf (errmsg, err_len, "POINTER attribute mismatch in " | |
1635 | "function result"); | |
524af0d6 | 1636 | return false; |
edc802c7 JW |
1637 | } |
1638 | ||
1639 | /* Check CONTIGUOUS attribute. */ | |
1640 | if (r1->attr.contiguous != r2->attr.contiguous) | |
1641 | { | |
1642 | snprintf (errmsg, err_len, "CONTIGUOUS attribute mismatch in " | |
1643 | "function result"); | |
524af0d6 | 1644 | return false; |
edc802c7 JW |
1645 | } |
1646 | ||
1647 | /* Check PROCEDURE POINTER attribute. */ | |
1648 | if (r1 != s1 && r1->attr.proc_pointer != r2->attr.proc_pointer) | |
1649 | { | |
1650 | snprintf (errmsg, err_len, "PROCEDURE POINTER mismatch in " | |
1651 | "function result"); | |
524af0d6 | 1652 | return false; |
edc802c7 JW |
1653 | } |
1654 | ||
1655 | /* Check string length. */ | |
1656 | if (r1->ts.type == BT_CHARACTER && r1->ts.u.cl && r2->ts.u.cl) | |
1657 | { | |
1658 | if (r1->ts.deferred != r2->ts.deferred) | |
1659 | { | |
1660 | snprintf (errmsg, err_len, "Character length mismatch " | |
1661 | "in function result"); | |
524af0d6 | 1662 | return false; |
edc802c7 JW |
1663 | } |
1664 | ||
96486998 | 1665 | if (r1->ts.u.cl->length && r2->ts.u.cl->length) |
edc802c7 JW |
1666 | { |
1667 | int compval = gfc_dep_compare_expr (r1->ts.u.cl->length, | |
1668 | r2->ts.u.cl->length); | |
1669 | switch (compval) | |
1670 | { | |
1671 | case -1: | |
1672 | case 1: | |
1673 | case -3: | |
1674 | snprintf (errmsg, err_len, "Character length mismatch " | |
1675 | "in function result"); | |
524af0d6 | 1676 | return false; |
edc802c7 JW |
1677 | |
1678 | case -2: | |
1679 | /* FIXME: Implement a warning for this case. | |
1680 | snprintf (errmsg, err_len, "Possible character length mismatch " | |
1681 | "in function result");*/ | |
1682 | break; | |
1683 | ||
1684 | case 0: | |
1685 | break; | |
1686 | ||
1687 | default: | |
1688 | gfc_internal_error ("check_result_characteristics (1): Unexpected " | |
1689 | "result %i of gfc_dep_compare_expr", compval); | |
1690 | break; | |
1691 | } | |
1692 | } | |
1693 | } | |
1694 | ||
1695 | /* Check array shape. */ | |
1696 | if (!r1->attr.allocatable && !r1->attr.pointer && r1->as && r2->as) | |
1697 | { | |
1698 | int i, compval; | |
1699 | gfc_expr *shape1, *shape2; | |
1700 | ||
1701 | if (r1->as->type != r2->as->type) | |
1702 | { | |
1703 | snprintf (errmsg, err_len, "Shape mismatch in function result"); | |
524af0d6 | 1704 | return false; |
edc802c7 JW |
1705 | } |
1706 | ||
1707 | if (r1->as->type == AS_EXPLICIT) | |
1708 | for (i = 0; i < r1->as->rank + r1->as->corank; i++) | |
1709 | { | |
1710 | shape1 = gfc_subtract (gfc_copy_expr (r1->as->upper[i]), | |
1711 | gfc_copy_expr (r1->as->lower[i])); | |
1712 | shape2 = gfc_subtract (gfc_copy_expr (r2->as->upper[i]), | |
1713 | gfc_copy_expr (r2->as->lower[i])); | |
1714 | compval = gfc_dep_compare_expr (shape1, shape2); | |
1715 | gfc_free_expr (shape1); | |
1716 | gfc_free_expr (shape2); | |
1717 | switch (compval) | |
1718 | { | |
1719 | case -1: | |
1720 | case 1: | |
1721 | case -3: | |
1722 | snprintf (errmsg, err_len, "Shape mismatch in dimension %i of " | |
1723 | "function result", i + 1); | |
524af0d6 | 1724 | return false; |
edc802c7 JW |
1725 | |
1726 | case -2: | |
1727 | /* FIXME: Implement a warning for this case. | |
db30e21c | 1728 | gfc_warning (0, "Possible shape mismatch in return value");*/ |
edc802c7 JW |
1729 | break; |
1730 | ||
1731 | case 0: | |
1732 | break; | |
1733 | ||
1734 | default: | |
1735 | gfc_internal_error ("check_result_characteristics (2): " | |
1736 | "Unexpected result %i of " | |
1737 | "gfc_dep_compare_expr", compval); | |
1738 | break; | |
1739 | } | |
1740 | } | |
1741 | } | |
1742 | ||
524af0d6 | 1743 | return true; |
edc802c7 JW |
1744 | } |
1745 | ||
1746 | ||
6de9cd9a | 1747 | /* 'Compare' two formal interfaces associated with a pair of symbols. |
f3e1097b | 1748 | We return true if there exists an actual argument list that |
8ad15a0a | 1749 | would be ambiguous between the two interfaces, zero otherwise. |
58c1ae36 | 1750 | 'strict_flag' specifies whether all the characteristics are |
6f3ab30d JW |
1751 | required to match, which is not the case for ambiguity checks. |
1752 | 'p1' and 'p2' are the PASS arguments of both procedures (if applicable). */ | |
6de9cd9a | 1753 | |
f3e1097b | 1754 | bool |
889dc035 | 1755 | gfc_compare_interfaces (gfc_symbol *s1, gfc_symbol *s2, const char *name2, |
58c1ae36 | 1756 | int generic_flag, int strict_flag, |
6f3ab30d | 1757 | char *errmsg, int err_len, |
2298af08 TK |
1758 | const char *p1, const char *p2, |
1759 | bool *bad_result_characteristics) | |
6de9cd9a DN |
1760 | { |
1761 | gfc_formal_arglist *f1, *f2; | |
1762 | ||
0175478d JD |
1763 | gcc_assert (name2 != NULL); |
1764 | ||
2298af08 TK |
1765 | if (bad_result_characteristics) |
1766 | *bad_result_characteristics = false; | |
1767 | ||
9b63f282 JW |
1768 | if (s1->attr.function && (s2->attr.subroutine |
1769 | || (!s2->attr.function && s2->ts.type == BT_UNKNOWN | |
889dc035 | 1770 | && gfc_get_default_type (name2, s2->ns)->type == BT_UNKNOWN))) |
8ad15a0a JW |
1771 | { |
1772 | if (errmsg != NULL) | |
889dc035 | 1773 | snprintf (errmsg, err_len, "'%s' is not a function", name2); |
f3e1097b | 1774 | return false; |
8ad15a0a JW |
1775 | } |
1776 | ||
1777 | if (s1->attr.subroutine && s2->attr.function) | |
1778 | { | |
1779 | if (errmsg != NULL) | |
889dc035 | 1780 | snprintf (errmsg, err_len, "'%s' is not a subroutine", name2); |
f3e1097b | 1781 | return false; |
8ad15a0a | 1782 | } |
3afadac3 | 1783 | |
58c1ae36 JW |
1784 | /* Do strict checks on all characteristics |
1785 | (for dummy procedures and procedure pointer assignments). */ | |
1786 | if (!generic_flag && strict_flag) | |
6cc309c9 | 1787 | { |
58c1ae36 | 1788 | if (s1->attr.function && s2->attr.function) |
8ad15a0a | 1789 | { |
edc802c7 | 1790 | /* If both are functions, check result characteristics. */ |
4668d6f9 PT |
1791 | if (!gfc_check_result_characteristics (s1, s2, errmsg, err_len) |
1792 | || !gfc_check_result_characteristics (s2, s1, errmsg, err_len)) | |
2298af08 TK |
1793 | { |
1794 | if (bad_result_characteristics) | |
1795 | *bad_result_characteristics = true; | |
1796 | return false; | |
1797 | } | |
58c1ae36 JW |
1798 | } |
1799 | ||
1800 | if (s1->attr.pure && !s2->attr.pure) | |
1801 | { | |
1802 | snprintf (errmsg, err_len, "Mismatch in PURE attribute"); | |
f3e1097b | 1803 | return false; |
58c1ae36 JW |
1804 | } |
1805 | if (s1->attr.elemental && !s2->attr.elemental) | |
1806 | { | |
1807 | snprintf (errmsg, err_len, "Mismatch in ELEMENTAL attribute"); | |
f3e1097b | 1808 | return false; |
8ad15a0a | 1809 | } |
6cc309c9 | 1810 | } |
26033479 | 1811 | |
8ad15a0a JW |
1812 | if (s1->attr.if_source == IFSRC_UNKNOWN |
1813 | || s2->attr.if_source == IFSRC_UNKNOWN) | |
f3e1097b | 1814 | return true; |
26033479 | 1815 | |
4cbc9039 JW |
1816 | f1 = gfc_sym_get_dummy_args (s1); |
1817 | f2 = gfc_sym_get_dummy_args (s2); | |
26033479 | 1818 | |
bd845c14 | 1819 | /* Special case: No arguments. */ |
c73b6478 | 1820 | if (f1 == NULL && f2 == NULL) |
f3e1097b | 1821 | return true; |
6cc309c9 | 1822 | |
c73b6478 | 1823 | if (generic_flag) |
6cc309c9 | 1824 | { |
6f3ab30d JW |
1825 | if (count_types_test (f1, f2, p1, p2) |
1826 | || count_types_test (f2, f1, p2, p1)) | |
f3e1097b | 1827 | return false; |
bd845c14 SK |
1828 | |
1829 | /* Special case: alternate returns. If both f1->sym and f2->sym are | |
e4e659b9 JW |
1830 | NULL, then the leading formal arguments are alternate returns. |
1831 | The previous conditional should catch argument lists with | |
bd845c14 SK |
1832 | different number of argument. */ |
1833 | if (f1 && f1->sym == NULL && f2 && f2->sym == NULL) | |
f3e1097b | 1834 | return true; |
bd845c14 | 1835 | |
6f3ab30d JW |
1836 | if (generic_correspondence (f1, f2, p1, p2) |
1837 | || generic_correspondence (f2, f1, p2, p1)) | |
f3e1097b | 1838 | return false; |
6cc309c9 | 1839 | } |
c73b6478 | 1840 | else |
8ad15a0a JW |
1841 | /* Perform the abbreviated correspondence test for operators (the |
1842 | arguments cannot be optional and are always ordered correctly). | |
1843 | This is also done when comparing interfaces for dummy procedures and in | |
1844 | procedure pointer assignments. */ | |
1845 | ||
f76c4d97 | 1846 | for (; f1 || f2; f1 = f1->next, f2 = f2->next) |
8ad15a0a JW |
1847 | { |
1848 | /* Check existence. */ | |
8ad15a0a JW |
1849 | if (f1 == NULL || f2 == NULL) |
1850 | { | |
1851 | if (errmsg != NULL) | |
1852 | snprintf (errmsg, err_len, "'%s' has the wrong number of " | |
889dc035 | 1853 | "arguments", name2); |
f3e1097b | 1854 | return false; |
8ad15a0a JW |
1855 | } |
1856 | ||
58c1ae36 | 1857 | if (strict_flag) |
8ad15a0a | 1858 | { |
9795c594 | 1859 | /* Check all characteristics. */ |
4668d6f9 | 1860 | if (!gfc_check_dummy_characteristics (f1->sym, f2->sym, true, |
524af0d6 | 1861 | errmsg, err_len)) |
f3e1097b | 1862 | return false; |
9795c594 | 1863 | } |
e7333b69 | 1864 | else |
9795c594 | 1865 | { |
d50cd259 | 1866 | /* Operators: Only check type and rank of arguments. */ |
e7333b69 JW |
1867 | if (!compare_type (f2->sym, f1->sym)) |
1868 | { | |
1869 | if (errmsg != NULL) | |
1870 | snprintf (errmsg, err_len, "Type mismatch in argument '%s' " | |
1871 | "(%s/%s)", f1->sym->name, | |
1872 | gfc_typename (&f1->sym->ts), | |
1873 | gfc_typename (&f2->sym->ts)); | |
f3e1097b | 1874 | return false; |
e7333b69 JW |
1875 | } |
1876 | if (!compare_rank (f2->sym, f1->sym)) | |
1877 | { | |
1878 | if (errmsg != NULL) | |
e0b9e5f9 TK |
1879 | snprintf (errmsg, err_len, "Rank mismatch in argument " |
1880 | "'%s' (%i/%i)", f1->sym->name, | |
1881 | symbol_rank (f1->sym), symbol_rank (f2->sym)); | |
f3e1097b | 1882 | return false; |
e7333b69 | 1883 | } |
d50cd259 JW |
1884 | if ((gfc_option.allow_std & GFC_STD_F2008) |
1885 | && (compare_ptr_alloc(f1->sym, f2->sym) | |
1886 | || compare_ptr_alloc(f2->sym, f1->sym))) | |
1887 | { | |
1888 | if (errmsg != NULL) | |
1889 | snprintf (errmsg, err_len, "Mismatching POINTER/ALLOCATABLE " | |
1890 | "attribute in argument '%s' ", f1->sym->name); | |
1891 | return false; | |
1892 | } | |
8ad15a0a | 1893 | } |
8ad15a0a JW |
1894 | } |
1895 | ||
f3e1097b | 1896 | return true; |
6cc309c9 JD |
1897 | } |
1898 | ||
1899 | ||
6de9cd9a | 1900 | /* Given a pointer to an interface pointer, remove duplicate |
284d58f1 | 1901 | interfaces and make sure that all symbols are either functions |
f3e1097b | 1902 | or subroutines, and all of the same kind. Returns true if |
284d58f1 | 1903 | something goes wrong. */ |
6de9cd9a | 1904 | |
f3e1097b | 1905 | static bool |
b251af97 | 1906 | check_interface0 (gfc_interface *p, const char *interface_name) |
6de9cd9a DN |
1907 | { |
1908 | gfc_interface *psave, *q, *qlast; | |
1909 | ||
1910 | psave = p; | |
6de9cd9a | 1911 | for (; p; p = p->next) |
284d58f1 DF |
1912 | { |
1913 | /* Make sure all symbols in the interface have been defined as | |
1914 | functions or subroutines. */ | |
c3f34952 TB |
1915 | if (((!p->sym->attr.function && !p->sym->attr.subroutine) |
1916 | || !p->sym->attr.if_source) | |
f6288c24 | 1917 | && !gfc_fl_struct (p->sym->attr.flavor)) |
284d58f1 | 1918 | { |
bcc478b9 BRF |
1919 | const char *guessed |
1920 | = gfc_lookup_function_fuzzy (p->sym->name, p->sym->ns->sym_root); | |
1921 | ||
284d58f1 | 1922 | if (p->sym->attr.external) |
bcc478b9 BRF |
1923 | if (guessed) |
1924 | gfc_error ("Procedure %qs in %s at %L has no explicit interface" | |
1925 | "; did you mean %qs?", | |
1926 | p->sym->name, interface_name, &p->sym->declared_at, | |
1927 | guessed); | |
1928 | else | |
1929 | gfc_error ("Procedure %qs in %s at %L has no explicit interface", | |
1930 | p->sym->name, interface_name, &p->sym->declared_at); | |
284d58f1 | 1931 | else |
bcc478b9 BRF |
1932 | if (guessed) |
1933 | gfc_error ("Procedure %qs in %s at %L is neither function nor " | |
1934 | "subroutine; did you mean %qs?", p->sym->name, | |
1935 | interface_name, &p->sym->declared_at, guessed); | |
1936 | else | |
1937 | gfc_error ("Procedure %qs in %s at %L is neither function nor " | |
1938 | "subroutine", p->sym->name, interface_name, | |
1939 | &p->sym->declared_at); | |
f3e1097b | 1940 | return true; |
284d58f1 DF |
1941 | } |
1942 | ||
1943 | /* Verify that procedures are either all SUBROUTINEs or all FUNCTIONs. */ | |
c3f34952 | 1944 | if ((psave->sym->attr.function && !p->sym->attr.function |
f6288c24 | 1945 | && !gfc_fl_struct (p->sym->attr.flavor)) |
284d58f1 DF |
1946 | || (psave->sym->attr.subroutine && !p->sym->attr.subroutine)) |
1947 | { | |
f6288c24 | 1948 | if (!gfc_fl_struct (p->sym->attr.flavor)) |
c3f34952 TB |
1949 | gfc_error ("In %s at %L procedures must be either all SUBROUTINEs" |
1950 | " or all FUNCTIONs", interface_name, | |
1951 | &p->sym->declared_at); | |
f6288c24 | 1952 | else if (p->sym->attr.flavor == FL_DERIVED) |
c3f34952 TB |
1953 | gfc_error ("In %s at %L procedures must be all FUNCTIONs as the " |
1954 | "generic name is also the name of a derived type", | |
1955 | interface_name, &p->sym->declared_at); | |
f3e1097b | 1956 | return true; |
284d58f1 | 1957 | } |
a300121e | 1958 | |
d2c5dbf2 | 1959 | /* F2003, C1207. F2008, C1207. */ |
a300121e | 1960 | if (p->sym->attr.proc == PROC_INTERNAL |
524af0d6 | 1961 | && !gfc_notify_std (GFC_STD_F2008, "Internal procedure " |
a4d9b221 | 1962 | "%qs in %s at %L", p->sym->name, |
524af0d6 | 1963 | interface_name, &p->sym->declared_at)) |
f3e1097b | 1964 | return true; |
284d58f1 | 1965 | } |
6de9cd9a DN |
1966 | p = psave; |
1967 | ||
1968 | /* Remove duplicate interfaces in this interface list. */ | |
1969 | for (; p; p = p->next) | |
1970 | { | |
1971 | qlast = p; | |
1972 | ||
1973 | for (q = p->next; q;) | |
1974 | { | |
1975 | if (p->sym != q->sym) | |
1976 | { | |
1977 | qlast = q; | |
1978 | q = q->next; | |
6de9cd9a DN |
1979 | } |
1980 | else | |
1981 | { | |
66e4ab31 | 1982 | /* Duplicate interface. */ |
6de9cd9a | 1983 | qlast->next = q->next; |
cede9502 | 1984 | free (q); |
6de9cd9a DN |
1985 | q = qlast->next; |
1986 | } | |
1987 | } | |
1988 | } | |
1989 | ||
f3e1097b | 1990 | return false; |
6de9cd9a DN |
1991 | } |
1992 | ||
1993 | ||
1994 | /* Check lists of interfaces to make sure that no two interfaces are | |
66e4ab31 | 1995 | ambiguous. Duplicate interfaces (from the same symbol) are OK here. */ |
6de9cd9a | 1996 | |
f3e1097b | 1997 | static bool |
b251af97 | 1998 | check_interface1 (gfc_interface *p, gfc_interface *q0, |
993ef28f | 1999 | int generic_flag, const char *interface_name, |
26f2ca2b | 2000 | bool referenced) |
6de9cd9a | 2001 | { |
b251af97 | 2002 | gfc_interface *q; |
6de9cd9a | 2003 | for (; p; p = p->next) |
991f3b12 | 2004 | for (q = q0; q; q = q->next) |
6de9cd9a DN |
2005 | { |
2006 | if (p->sym == q->sym) | |
66e4ab31 | 2007 | continue; /* Duplicates OK here. */ |
6de9cd9a | 2008 | |
312ae8f4 | 2009 | if (p->sym->name == q->sym->name && p->sym->module == q->sym->module) |
6de9cd9a DN |
2010 | continue; |
2011 | ||
f6288c24 FR |
2012 | if (!gfc_fl_struct (p->sym->attr.flavor) |
2013 | && !gfc_fl_struct (q->sym->attr.flavor) | |
c3f34952 | 2014 | && gfc_compare_interfaces (p->sym, q->sym, q->sym->name, |
6f3ab30d | 2015 | generic_flag, 0, NULL, 0, NULL, NULL)) |
6de9cd9a | 2016 | { |
993ef28f | 2017 | if (referenced) |
bd845c14 SK |
2018 | gfc_error ("Ambiguous interfaces in %s for %qs at %L " |
2019 | "and %qs at %L", interface_name, | |
2020 | q->sym->name, &q->sym->declared_at, | |
2021 | p->sym->name, &p->sym->declared_at); | |
ae7c61de | 2022 | else if (!p->sym->attr.use_assoc && q->sym->attr.use_assoc) |
bd845c14 SK |
2023 | gfc_warning (0, "Ambiguous interfaces in %s for %qs at %L " |
2024 | "and %qs at %L", interface_name, | |
2025 | q->sym->name, &q->sym->declared_at, | |
2026 | p->sym->name, &p->sym->declared_at); | |
ae7c61de | 2027 | else |
db30e21c | 2028 | gfc_warning (0, "Although not referenced, %qs has ambiguous " |
ae7c61de | 2029 | "interfaces at %L", interface_name, &p->where); |
f3e1097b | 2030 | return true; |
6de9cd9a DN |
2031 | } |
2032 | } | |
f3e1097b | 2033 | return false; |
6de9cd9a DN |
2034 | } |
2035 | ||
2036 | ||
2037 | /* Check the generic and operator interfaces of symbols to make sure | |
2038 | that none of the interfaces conflict. The check has to be done | |
2039 | after all of the symbols are actually loaded. */ | |
2040 | ||
2041 | static void | |
b251af97 | 2042 | check_sym_interfaces (gfc_symbol *sym) |
6de9cd9a | 2043 | { |
62c0c0ea HA |
2044 | /* Provide sufficient space to hold "generic interface 'symbol.symbol'". */ |
2045 | char interface_name[2*GFC_MAX_SYMBOL_LEN+2 + sizeof("generic interface ''")]; | |
71f77fd7 | 2046 | gfc_interface *p; |
6de9cd9a DN |
2047 | |
2048 | if (sym->ns != gfc_current_ns) | |
2049 | return; | |
2050 | ||
2051 | if (sym->generic != NULL) | |
2052 | { | |
62c0c0ea HA |
2053 | size_t len = strlen (sym->name) + sizeof("generic interface ''"); |
2054 | gcc_assert (len < sizeof (interface_name)); | |
6de9cd9a DN |
2055 | sprintf (interface_name, "generic interface '%s'", sym->name); |
2056 | if (check_interface0 (sym->generic, interface_name)) | |
2057 | return; | |
2058 | ||
71f77fd7 PT |
2059 | for (p = sym->generic; p; p = p->next) |
2060 | { | |
abf86978 | 2061 | if (p->sym->attr.mod_proc |
4668d6f9 | 2062 | && !p->sym->attr.module_procedure |
abf86978 TB |
2063 | && (p->sym->attr.if_source != IFSRC_DECL |
2064 | || p->sym->attr.procedure)) | |
71f77fd7 | 2065 | { |
c4100eae | 2066 | gfc_error ("%qs at %L is not a module procedure", |
e9f63ace | 2067 | p->sym->name, &p->where); |
71f77fd7 PT |
2068 | return; |
2069 | } | |
2070 | } | |
2071 | ||
4c256e34 | 2072 | /* Originally, this test was applied to host interfaces too; |
993ef28f PT |
2073 | this is incorrect since host associated symbols, from any |
2074 | source, cannot be ambiguous with local symbols. */ | |
ae7c61de JW |
2075 | check_interface1 (sym->generic, sym->generic, 1, interface_name, |
2076 | sym->attr.referenced || !sym->attr.use_assoc); | |
6de9cd9a DN |
2077 | } |
2078 | } | |
2079 | ||
2080 | ||
2081 | static void | |
b251af97 | 2082 | check_uop_interfaces (gfc_user_op *uop) |
6de9cd9a | 2083 | { |
439d2350 | 2084 | char interface_name[GFC_MAX_SYMBOL_LEN + sizeof("operator interface ''")]; |
6de9cd9a DN |
2085 | gfc_user_op *uop2; |
2086 | gfc_namespace *ns; | |
2087 | ||
2088 | sprintf (interface_name, "operator interface '%s'", uop->name); | |
a1ee985f | 2089 | if (check_interface0 (uop->op, interface_name)) |
6de9cd9a DN |
2090 | return; |
2091 | ||
2092 | for (ns = gfc_current_ns; ns; ns = ns->parent) | |
2093 | { | |
2094 | uop2 = gfc_find_uop (uop->name, ns); | |
2095 | if (uop2 == NULL) | |
2096 | continue; | |
2097 | ||
a1ee985f | 2098 | check_interface1 (uop->op, uop2->op, 0, |
26f2ca2b | 2099 | interface_name, true); |
6de9cd9a DN |
2100 | } |
2101 | } | |
2102 | ||
fb03a37e TK |
2103 | /* Given an intrinsic op, return an equivalent op if one exists, |
2104 | or INTRINSIC_NONE otherwise. */ | |
2105 | ||
2106 | gfc_intrinsic_op | |
2107 | gfc_equivalent_op (gfc_intrinsic_op op) | |
2108 | { | |
2109 | switch(op) | |
2110 | { | |
2111 | case INTRINSIC_EQ: | |
2112 | return INTRINSIC_EQ_OS; | |
2113 | ||
2114 | case INTRINSIC_EQ_OS: | |
2115 | return INTRINSIC_EQ; | |
2116 | ||
2117 | case INTRINSIC_NE: | |
2118 | return INTRINSIC_NE_OS; | |
2119 | ||
2120 | case INTRINSIC_NE_OS: | |
2121 | return INTRINSIC_NE; | |
2122 | ||
2123 | case INTRINSIC_GT: | |
2124 | return INTRINSIC_GT_OS; | |
2125 | ||
2126 | case INTRINSIC_GT_OS: | |
2127 | return INTRINSIC_GT; | |
2128 | ||
2129 | case INTRINSIC_GE: | |
2130 | return INTRINSIC_GE_OS; | |
2131 | ||
2132 | case INTRINSIC_GE_OS: | |
2133 | return INTRINSIC_GE; | |
2134 | ||
2135 | case INTRINSIC_LT: | |
2136 | return INTRINSIC_LT_OS; | |
2137 | ||
2138 | case INTRINSIC_LT_OS: | |
2139 | return INTRINSIC_LT; | |
2140 | ||
2141 | case INTRINSIC_LE: | |
2142 | return INTRINSIC_LE_OS; | |
2143 | ||
2144 | case INTRINSIC_LE_OS: | |
2145 | return INTRINSIC_LE; | |
2146 | ||
2147 | default: | |
2148 | return INTRINSIC_NONE; | |
2149 | } | |
2150 | } | |
6de9cd9a DN |
2151 | |
2152 | /* For the namespace, check generic, user operator and intrinsic | |
2153 | operator interfaces for consistency and to remove duplicate | |
2154 | interfaces. We traverse the whole namespace, counting on the fact | |
2155 | that most symbols will not have generic or operator interfaces. */ | |
2156 | ||
2157 | void | |
b251af97 | 2158 | gfc_check_interfaces (gfc_namespace *ns) |
6de9cd9a DN |
2159 | { |
2160 | gfc_namespace *old_ns, *ns2; | |
439d2350 | 2161 | char interface_name[GFC_MAX_SYMBOL_LEN + sizeof("intrinsic '' operator")]; |
09639a83 | 2162 | int i; |
6de9cd9a DN |
2163 | |
2164 | old_ns = gfc_current_ns; | |
2165 | gfc_current_ns = ns; | |
2166 | ||
2167 | gfc_traverse_ns (ns, check_sym_interfaces); | |
2168 | ||
2169 | gfc_traverse_user_op (ns, check_uop_interfaces); | |
2170 | ||
2171 | for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++) | |
2172 | { | |
2173 | if (i == INTRINSIC_USER) | |
2174 | continue; | |
2175 | ||
2176 | if (i == INTRINSIC_ASSIGN) | |
2177 | strcpy (interface_name, "intrinsic assignment operator"); | |
2178 | else | |
2179 | sprintf (interface_name, "intrinsic '%s' operator", | |
09639a83 | 2180 | gfc_op2string ((gfc_intrinsic_op) i)); |
6de9cd9a | 2181 | |
a1ee985f | 2182 | if (check_interface0 (ns->op[i], interface_name)) |
6de9cd9a DN |
2183 | continue; |
2184 | ||
94747289 DK |
2185 | if (ns->op[i]) |
2186 | gfc_check_operator_interface (ns->op[i]->sym, (gfc_intrinsic_op) i, | |
2187 | ns->op[i]->where); | |
6de9cd9a | 2188 | |
3bed9dd0 DF |
2189 | for (ns2 = ns; ns2; ns2 = ns2->parent) |
2190 | { | |
fb03a37e | 2191 | gfc_intrinsic_op other_op; |
8b704316 | 2192 | |
a1ee985f | 2193 | if (check_interface1 (ns->op[i], ns2->op[i], 0, |
3bed9dd0 DF |
2194 | interface_name, true)) |
2195 | goto done; | |
2196 | ||
fb03a37e TK |
2197 | /* i should be gfc_intrinsic_op, but has to be int with this cast |
2198 | here for stupid C++ compatibility rules. */ | |
2199 | other_op = gfc_equivalent_op ((gfc_intrinsic_op) i); | |
2200 | if (other_op != INTRINSIC_NONE | |
2201 | && check_interface1 (ns->op[i], ns2->op[other_op], | |
2202 | 0, interface_name, true)) | |
2203 | goto done; | |
3bed9dd0 | 2204 | } |
6de9cd9a DN |
2205 | } |
2206 | ||
3bed9dd0 | 2207 | done: |
6de9cd9a DN |
2208 | gfc_current_ns = old_ns; |
2209 | } | |
2210 | ||
2211 | ||
aa08038d EE |
2212 | /* Given a symbol of a formal argument list and an expression, if the |
2213 | formal argument is allocatable, check that the actual argument is | |
f3e1097b | 2214 | allocatable. Returns true if compatible, zero if not compatible. */ |
aa08038d | 2215 | |
f3e1097b | 2216 | static bool |
b251af97 | 2217 | compare_allocatable (gfc_symbol *formal, gfc_expr *actual) |
aa08038d | 2218 | { |
5ac13b8e JW |
2219 | if (formal->attr.allocatable |
2220 | || (formal->ts.type == BT_CLASS && CLASS_DATA (formal)->attr.allocatable)) | |
aa08038d | 2221 | { |
fec5ce24 JW |
2222 | symbol_attribute attr = gfc_expr_attr (actual); |
2223 | if (actual->ts.type == BT_CLASS && !attr.class_ok) | |
f3e1097b | 2224 | return true; |
fec5ce24 | 2225 | else if (!attr.allocatable) |
f3e1097b | 2226 | return false; |
aa08038d EE |
2227 | } |
2228 | ||
f3e1097b | 2229 | return true; |
aa08038d EE |
2230 | } |
2231 | ||
2232 | ||
6de9cd9a DN |
2233 | /* Given a symbol of a formal argument list and an expression, if the |
2234 | formal argument is a pointer, see if the actual argument is a | |
2235 | pointer. Returns nonzero if compatible, zero if not compatible. */ | |
2236 | ||
2237 | static int | |
b251af97 | 2238 | compare_pointer (gfc_symbol *formal, gfc_expr *actual) |
6de9cd9a DN |
2239 | { |
2240 | symbol_attribute attr; | |
2241 | ||
f18075ff TB |
2242 | if (formal->attr.pointer |
2243 | || (formal->ts.type == BT_CLASS && CLASS_DATA (formal) | |
2244 | && CLASS_DATA (formal)->attr.class_pointer)) | |
6de9cd9a DN |
2245 | { |
2246 | attr = gfc_expr_attr (actual); | |
7d54ef80 TB |
2247 | |
2248 | /* Fortran 2008 allows non-pointer actual arguments. */ | |
2249 | if (!attr.pointer && attr.target && formal->attr.intent == INTENT_IN) | |
2250 | return 2; | |
2251 | ||
6de9cd9a DN |
2252 | if (!attr.pointer) |
2253 | return 0; | |
2254 | } | |
2255 | ||
2256 | return 1; | |
2257 | } | |
2258 | ||
2259 | ||
a516520c PT |
2260 | /* Emit clear error messages for rank mismatch. */ |
2261 | ||
2262 | static void | |
2263 | argument_rank_mismatch (const char *name, locus *where, | |
e0b9e5f9 | 2264 | int rank1, int rank2, locus *where_formal) |
a516520c | 2265 | { |
c62c6622 TB |
2266 | |
2267 | /* TS 29113, C407b. */ | |
e0b9e5f9 TK |
2268 | if (where_formal == NULL) |
2269 | { | |
2270 | if (rank2 == -1) | |
2271 | gfc_error ("The assumed-rank array at %L requires that the dummy " | |
2272 | "argument %qs has assumed-rank", where, name); | |
2273 | else if (rank1 == 0) | |
2274 | gfc_error_opt (0, "Rank mismatch in argument %qs " | |
2275 | "at %L (scalar and rank-%d)", name, where, rank2); | |
2276 | else if (rank2 == 0) | |
2277 | gfc_error_opt (0, "Rank mismatch in argument %qs " | |
2278 | "at %L (rank-%d and scalar)", name, where, rank1); | |
2279 | else | |
2280 | gfc_error_opt (0, "Rank mismatch in argument %qs " | |
2281 | "at %L (rank-%d and rank-%d)", name, where, rank1, | |
2282 | rank2); | |
2283 | } | |
a516520c | 2284 | else |
e0b9e5f9 | 2285 | { |
8e277106 SL |
2286 | if (rank2 == -1) |
2287 | /* This is an assumed rank-actual passed to a function without | |
2288 | an explicit interface, which is already diagnosed in | |
2289 | gfc_procedure_use. */ | |
2290 | return; | |
e0b9e5f9 TK |
2291 | if (rank1 == 0) |
2292 | gfc_error_opt (0, "Rank mismatch between actual argument at %L " | |
2293 | "and actual argument at %L (scalar and rank-%d)", | |
2294 | where, where_formal, rank2); | |
2295 | else if (rank2 == 0) | |
2296 | gfc_error_opt (0, "Rank mismatch between actual argument at %L " | |
2297 | "and actual argument at %L (rank-%d and scalar)", | |
2298 | where, where_formal, rank1); | |
2299 | else | |
2300 | gfc_error_opt (0, "Rank mismatch between actual argument at %L " | |
92e8508e | 2301 | "and actual argument at %L (rank-%d and rank-%d)", where, |
e0b9e5f9 TK |
2302 | where_formal, rank1, rank2); |
2303 | } | |
a516520c PT |
2304 | } |
2305 | ||
2306 | ||
4a4fc7fe TK |
2307 | /* Under certain conditions, a scalar actual argument can be passed |
2308 | to an array dummy argument - see F2018, 15.5.2.4, paragraph 14. | |
2309 | This function returns true for these conditions so that an error | |
2310 | or warning for this can be suppressed later. Always return false | |
2311 | for expressions with rank > 0. */ | |
2312 | ||
2313 | bool | |
2314 | maybe_dummy_array_arg (gfc_expr *e) | |
2315 | { | |
2316 | gfc_symbol *s; | |
2317 | gfc_ref *ref; | |
2318 | bool array_pointer = false; | |
2319 | bool assumed_shape = false; | |
2320 | bool scalar_ref = true; | |
2321 | ||
2322 | if (e->rank > 0) | |
2323 | return false; | |
2324 | ||
2325 | if (e->ts.type == BT_CHARACTER && e->ts.kind == 1) | |
2326 | return true; | |
2327 | ||
2328 | /* If this comes from a constructor, it has been an array element | |
2329 | originally. */ | |
2330 | ||
2331 | if (e->expr_type == EXPR_CONSTANT) | |
2332 | return e->from_constructor; | |
2333 | ||
2334 | if (e->expr_type != EXPR_VARIABLE) | |
2335 | return false; | |
2336 | ||
2337 | s = e->symtree->n.sym; | |
2338 | ||
2339 | if (s->attr.dimension) | |
2340 | { | |
2341 | scalar_ref = false; | |
2342 | array_pointer = s->attr.pointer; | |
2343 | } | |
2344 | ||
2345 | if (s->as && s->as->type == AS_ASSUMED_SHAPE) | |
2346 | assumed_shape = true; | |
2347 | ||
2348 | for (ref=e->ref; ref; ref=ref->next) | |
2349 | { | |
2350 | if (ref->type == REF_COMPONENT) | |
2351 | { | |
2352 | symbol_attribute *attr; | |
2353 | attr = &ref->u.c.component->attr; | |
2354 | if (attr->dimension) | |
2355 | { | |
2356 | array_pointer = attr->pointer; | |
2357 | assumed_shape = false; | |
2358 | scalar_ref = false; | |
2359 | } | |
2360 | else | |
2361 | scalar_ref = true; | |
2362 | } | |
2363 | } | |
2364 | ||
2365 | return !(scalar_ref || array_pointer || assumed_shape); | |
2366 | } | |
2367 | ||
6de9cd9a | 2368 | /* Given a symbol of a formal argument list and an expression, see if |
f3e1097b JW |
2369 | the two are compatible as arguments. Returns true if |
2370 | compatible, false if not compatible. */ | |
6de9cd9a | 2371 | |
f3e1097b | 2372 | static bool |
b251af97 | 2373 | compare_parameter (gfc_symbol *formal, gfc_expr *actual, |
5ad6345e | 2374 | int ranks_must_agree, int is_elemental, locus *where) |
6de9cd9a DN |
2375 | { |
2376 | gfc_ref *ref; | |
975b975b | 2377 | bool rank_check, is_pointer; |
5c0ba546 JW |
2378 | char err[200]; |
2379 | gfc_component *ppc; | |
fc27115d | 2380 | bool codimension = false; |
901edd99 | 2381 | gfc_array_spec *formal_as; |
6de9cd9a | 2382 | |
a8b3b0b6 CR |
2383 | /* If the formal arg has type BT_VOID, it's to one of the iso_c_binding |
2384 | procs c_f_pointer or c_f_procpointer, and we need to accept most | |
2385 | pointers the user could give us. This should allow that. */ | |
2386 | if (formal->ts.type == BT_VOID) | |
f3e1097b | 2387 | return true; |
a8b3b0b6 CR |
2388 | |
2389 | if (formal->ts.type == BT_DERIVED | |
bc21d315 | 2390 | && formal->ts.u.derived && formal->ts.u.derived->ts.is_iso_c |
a8b3b0b6 | 2391 | && actual->ts.type == BT_DERIVED |
bc21d315 | 2392 | && actual->ts.u.derived && actual->ts.u.derived->ts.is_iso_c) |
c482995c HA |
2393 | { |
2394 | if (formal->ts.u.derived->intmod_sym_id | |
2395 | != actual->ts.u.derived->intmod_sym_id) | |
2396 | return false; | |
2397 | ||
2398 | if (ranks_must_agree | |
2399 | && symbol_rank (formal) != actual->rank | |
2400 | && symbol_rank (formal) != -1) | |
2401 | { | |
2402 | if (where) | |
2403 | argument_rank_mismatch (formal->name, &actual->where, | |
2404 | symbol_rank (formal), actual->rank, | |
2405 | NULL); | |
2406 | return false; | |
2407 | } | |
2408 | return true; | |
2409 | } | |
a8b3b0b6 | 2410 | |
7d58b9e7 | 2411 | if (formal->ts.type == BT_CLASS && actual->ts.type == BT_DERIVED) |
e10f52d0 JW |
2412 | /* Make sure the vtab symbol is present when |
2413 | the module variables are generated. */ | |
7d58b9e7 | 2414 | gfc_find_derived_vtab (actual->ts.u.derived); |
e10f52d0 | 2415 | |
6de9cd9a DN |
2416 | if (actual->ts.type == BT_PROCEDURE) |
2417 | { | |
9b63f282 | 2418 | gfc_symbol *act_sym = actual->symtree->n.sym; |
6de9cd9a | 2419 | |
8ad15a0a JW |
2420 | if (formal->attr.flavor != FL_PROCEDURE) |
2421 | { | |
2422 | if (where) | |
2423 | gfc_error ("Invalid procedure argument at %L", &actual->where); | |
f3e1097b | 2424 | return false; |
8ad15a0a | 2425 | } |
6de9cd9a | 2426 | |
889dc035 | 2427 | if (!gfc_compare_interfaces (formal, act_sym, act_sym->name, 0, 1, err, |
6f3ab30d | 2428 | sizeof(err), NULL, NULL)) |
8ad15a0a JW |
2429 | { |
2430 | if (where) | |
e0b9e5f9 | 2431 | gfc_error_opt (0, "Interface mismatch in dummy procedure %qs at %L:" |
2700d0e3 | 2432 | " %s", formal->name, &actual->where, err); |
f3e1097b | 2433 | return false; |
8ad15a0a | 2434 | } |
5ad6345e | 2435 | |
9b63f282 | 2436 | if (formal->attr.function && !act_sym->attr.function) |
03bd096b JW |
2437 | { |
2438 | gfc_add_function (&act_sym->attr, act_sym->name, | |
2439 | &act_sym->declared_at); | |
2440 | if (act_sym->ts.type == BT_UNKNOWN | |
524af0d6 | 2441 | && !gfc_set_default_type (act_sym, 1, act_sym->ns)) |
f3e1097b | 2442 | return false; |
03bd096b JW |
2443 | } |
2444 | else if (formal->attr.subroutine && !act_sym->attr.subroutine) | |
9b63f282 JW |
2445 | gfc_add_subroutine (&act_sym->attr, act_sym->name, |
2446 | &act_sym->declared_at); | |
2447 | ||
f3e1097b | 2448 | return true; |
6de9cd9a DN |
2449 | } |
2450 | ||
5c0ba546 | 2451 | ppc = gfc_get_proc_ptr_comp (actual); |
228eb42a | 2452 | if (ppc && ppc->ts.interface) |
5c0ba546 JW |
2453 | { |
2454 | if (!gfc_compare_interfaces (formal, ppc->ts.interface, ppc->name, 0, 1, | |
2455 | err, sizeof(err), NULL, NULL)) | |
2456 | { | |
2457 | if (where) | |
e0b9e5f9 | 2458 | gfc_error_opt (0, "Interface mismatch in dummy procedure %qs at %L:" |
2700d0e3 | 2459 | " %s", formal->name, &actual->where, err); |
f3e1097b | 2460 | return false; |
5c0ba546 JW |
2461 | } |
2462 | } | |
2463 | ||
fe4e525c TB |
2464 | /* F2008, C1241. */ |
2465 | if (formal->attr.pointer && formal->attr.contiguous | |
460263d0 | 2466 | && !gfc_is_simply_contiguous (actual, true, false)) |
fe4e525c TB |
2467 | { |
2468 | if (where) | |
c4100eae | 2469 | gfc_error ("Actual argument to contiguous pointer dummy %qs at %L " |
62732c30 | 2470 | "must be simply contiguous", formal->name, &actual->where); |
f3e1097b | 2471 | return false; |
fe4e525c TB |
2472 | } |
2473 | ||
fec5ce24 JW |
2474 | symbol_attribute actual_attr = gfc_expr_attr (actual); |
2475 | if (actual->ts.type == BT_CLASS && !actual_attr.class_ok) | |
f3e1097b | 2476 | return true; |
fec5ce24 | 2477 | |
90aeadcb | 2478 | if ((actual->expr_type != EXPR_NULL || actual->ts.type != BT_UNKNOWN) |
df161b69 | 2479 | && actual->ts.type != BT_HOLLERITH |
45a69325 | 2480 | && formal->ts.type != BT_ASSUMED |
e7ac6a7c | 2481 | && !(formal->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK)) |
c49ea23d PT |
2482 | && !gfc_compare_types (&formal->ts, &actual->ts) |
2483 | && !(formal->ts.type == BT_DERIVED && actual->ts.type == BT_CLASS | |
8b704316 | 2484 | && gfc_compare_derived_types (formal->ts.u.derived, |
c49ea23d | 2485 | CLASS_DATA (actual)->ts.u.derived))) |
5ad6345e | 2486 | { |
d68e117b | 2487 | if (where) |
e0b9e5f9 TK |
2488 | { |
2489 | if (formal->attr.artificial) | |
2490 | { | |
2491 | if (!flag_allow_argument_mismatch || !formal->error) | |
2492 | gfc_error_opt (0, "Type mismatch between actual argument at %L " | |
2493 | "and actual argument at %L (%s/%s).", | |
2494 | &actual->where, | |
2495 | &formal->declared_at, | |
f61e54e5 ME |
2496 | gfc_typename (actual), |
2497 | gfc_dummy_typename (&formal->ts)); | |
e0b9e5f9 TK |
2498 | |
2499 | formal->error = 1; | |
2500 | } | |
2501 | else | |
2502 | gfc_error_opt (0, "Type mismatch in argument %qs at %L; passed %s " | |
f61e54e5 ME |
2503 | "to %s", formal->name, where, gfc_typename (actual), |
2504 | gfc_dummy_typename (&formal->ts)); | |
e0b9e5f9 | 2505 | } |
f3e1097b | 2506 | return false; |
5ad6345e | 2507 | } |
f18075ff | 2508 | |
3d54e576 TB |
2509 | if (actual->ts.type == BT_ASSUMED && formal->ts.type != BT_ASSUMED) |
2510 | { | |
2511 | if (where) | |
2512 | gfc_error ("Assumed-type actual argument at %L requires that dummy " | |
c4100eae | 2513 | "argument %qs is of assumed type", &actual->where, |
3d54e576 | 2514 | formal->name); |
f3e1097b | 2515 | return false; |
3d54e576 TB |
2516 | } |
2517 | ||
2364250e SL |
2518 | /* TS29113 C407c; F2018 C711. */ |
2519 | if (actual->ts.type == BT_ASSUMED | |
2520 | && symbol_rank (formal) == -1 | |
2521 | && actual->rank != -1 | |
2522 | && !(actual->symtree->n.sym->as | |
2523 | && actual->symtree->n.sym->as->type == AS_ASSUMED_SHAPE)) | |
2524 | { | |
2525 | if (where) | |
2526 | gfc_error ("Assumed-type actual argument at %L corresponding to " | |
2527 | "assumed-rank dummy argument %qs must be " | |
2528 | "assumed-shape or assumed-rank", | |
2529 | &actual->where, formal->name); | |
2530 | return false; | |
2531 | } | |
2532 | ||
f18075ff | 2533 | /* F2008, 12.5.2.5; IR F08/0073. */ |
67b1d004 JW |
2534 | if (formal->ts.type == BT_CLASS && formal->attr.class_ok |
2535 | && actual->expr_type != EXPR_NULL | |
f18075ff | 2536 | && ((CLASS_DATA (formal)->attr.class_pointer |
86eb9e2f | 2537 | && formal->attr.intent != INTENT_IN) |
5ac13b8e JW |
2538 | || CLASS_DATA (formal)->attr.allocatable)) |
2539 | { | |
2540 | if (actual->ts.type != BT_CLASS) | |
2541 | { | |
2542 | if (where) | |
c4100eae | 2543 | gfc_error ("Actual argument to %qs at %L must be polymorphic", |
5ac13b8e | 2544 | formal->name, &actual->where); |
f3e1097b | 2545 | return false; |
5ac13b8e | 2546 | } |
67b1d004 | 2547 | |
a8267f8d TB |
2548 | if ((!UNLIMITED_POLY (formal) || !UNLIMITED_POLY(actual)) |
2549 | && !gfc_compare_derived_types (CLASS_DATA (actual)->ts.u.derived, | |
2550 | CLASS_DATA (formal)->ts.u.derived)) | |
5ac13b8e JW |
2551 | { |
2552 | if (where) | |
c4100eae | 2553 | gfc_error ("Actual argument to %qs at %L must have the same " |
5ac13b8e | 2554 | "declared type", formal->name, &actual->where); |
f3e1097b | 2555 | return false; |
5ac13b8e JW |
2556 | } |
2557 | } | |
6de9cd9a | 2558 | |
8b704316 PT |
2559 | /* F08: 12.5.2.5 Allocatable and pointer dummy variables. However, this |
2560 | is necessary also for F03, so retain error for both. | |
2561 | NOTE: Other type/kind errors pre-empt this error. Since they are F03 | |
2562 | compatible, no attempt has been made to channel to this one. */ | |
2563 | if (UNLIMITED_POLY (formal) && !UNLIMITED_POLY (actual) | |
2564 | && (CLASS_DATA (formal)->attr.allocatable | |
2565 | ||CLASS_DATA (formal)->attr.class_pointer)) | |
2566 | { | |
2567 | if (where) | |
c4100eae | 2568 | gfc_error ("Actual argument to %qs at %L must be unlimited " |
8b704316 PT |
2569 | "polymorphic since the formal argument is a " |
2570 | "pointer or allocatable unlimited polymorphic " | |
2571 | "entity [F2008: 12.5.2.5]", formal->name, | |
2572 | &actual->where); | |
f3e1097b | 2573 | return false; |
8b704316 PT |
2574 | } |
2575 | ||
fc27115d PT |
2576 | if (formal->ts.type == BT_CLASS && formal->attr.class_ok) |
2577 | codimension = CLASS_DATA (formal)->attr.codimension; | |
2578 | else | |
2579 | codimension = formal->attr.codimension; | |
2580 | ||
2581 | if (codimension && !gfc_is_coarray (actual)) | |
d3a9eea2 | 2582 | { |
394d3a2e | 2583 | if (where) |
c4100eae | 2584 | gfc_error ("Actual argument to %qs at %L must be a coarray", |
d3a9eea2 | 2585 | formal->name, &actual->where); |
f3e1097b | 2586 | return false; |
394d3a2e | 2587 | } |
d3a9eea2 | 2588 | |
901edd99 HA |
2589 | formal_as = (formal->ts.type == BT_CLASS |
2590 | ? CLASS_DATA (formal)->as : formal->as); | |
2591 | ||
fc27115d | 2592 | if (codimension && formal->attr.allocatable) |
394d3a2e TB |
2593 | { |
2594 | gfc_ref *last = NULL; | |
a3935ffc | 2595 | |
d3a9eea2 | 2596 | for (ref = actual->ref; ref; ref = ref->next) |
394d3a2e TB |
2597 | if (ref->type == REF_COMPONENT) |
2598 | last = ref; | |
d3a9eea2 | 2599 | |
d3a9eea2 | 2600 | /* F2008, 12.5.2.6. */ |
394d3a2e TB |
2601 | if ((last && last->u.c.component->as->corank != formal->as->corank) |
2602 | || (!last | |
2603 | && actual->symtree->n.sym->as->corank != formal->as->corank)) | |
d3a9eea2 TB |
2604 | { |
2605 | if (where) | |
c4100eae | 2606 | gfc_error ("Corank mismatch in argument %qs at %L (%d and %d)", |
d3a9eea2 TB |
2607 | formal->name, &actual->where, formal->as->corank, |
2608 | last ? last->u.c.component->as->corank | |
2609 | : actual->symtree->n.sym->as->corank); | |
f3e1097b | 2610 | return false; |
d3a9eea2 | 2611 | } |
394d3a2e | 2612 | } |
fe4e525c | 2613 | |
fc27115d | 2614 | if (codimension) |
394d3a2e | 2615 | { |
460263d0 | 2616 | /* F2008, 12.5.2.8 + Corrig 2 (IR F08/0048). */ |
8179b067 | 2617 | /* F2018, 12.5.2.8. */ |
fe4e525c TB |
2618 | if (formal->attr.dimension |
2619 | && (formal->attr.contiguous || formal->as->type != AS_ASSUMED_SHAPE) | |
fec5ce24 | 2620 | && actual_attr.dimension |
460263d0 | 2621 | && !gfc_is_simply_contiguous (actual, true, true)) |
fe4e525c TB |
2622 | { |
2623 | if (where) | |
c4100eae | 2624 | gfc_error ("Actual argument to %qs at %L must be simply " |
460263d0 TB |
2625 | "contiguous or an element of such an array", |
2626 | formal->name, &actual->where); | |
f3e1097b | 2627 | return false; |
fe4e525c | 2628 | } |
fea54935 TB |
2629 | |
2630 | /* F2008, C1303 and C1304. */ | |
2631 | if (formal->attr.intent != INTENT_INOUT | |
2632 | && (((formal->ts.type == BT_DERIVED || formal->ts.type == BT_CLASS) | |
2633 | && formal->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV | |
2634 | && formal->ts.u.derived->intmod_sym_id == ISOFORTRAN_LOCK_TYPE) | |
2635 | || formal->attr.lock_comp)) | |
2636 | ||
2637 | { | |
2638 | if (where) | |
c4100eae | 2639 | gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, " |
fea54935 TB |
2640 | "which is LOCK_TYPE or has a LOCK_TYPE component", |
2641 | formal->name, &actual->where); | |
f3e1097b | 2642 | return false; |
fea54935 | 2643 | } |
5df445a2 TB |
2644 | |
2645 | /* TS18508, C702/C703. */ | |
2646 | if (formal->attr.intent != INTENT_INOUT | |
2647 | && (((formal->ts.type == BT_DERIVED || formal->ts.type == BT_CLASS) | |
2648 | && formal->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV | |
2649 | && formal->ts.u.derived->intmod_sym_id == ISOFORTRAN_EVENT_TYPE) | |
2650 | || formal->attr.event_comp)) | |
2651 | ||
2652 | { | |
2653 | if (where) | |
2654 | gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, " | |
2655 | "which is EVENT_TYPE or has a EVENT_TYPE component", | |
2656 | formal->name, &actual->where); | |
f3e1097b | 2657 | return false; |
5df445a2 | 2658 | } |
394d3a2e | 2659 | } |
fe4e525c TB |
2660 | |
2661 | /* F2008, C1239/C1240. */ | |
2662 | if (actual->expr_type == EXPR_VARIABLE | |
2663 | && (actual->symtree->n.sym->attr.asynchronous | |
2664 | || actual->symtree->n.sym->attr.volatile_) | |
2665 | && (formal->attr.asynchronous || formal->attr.volatile_) | |
460263d0 TB |
2666 | && actual->rank && formal->as |
2667 | && !gfc_is_simply_contiguous (actual, true, false) | |
f188272d TB |
2668 | && ((formal->as->type != AS_ASSUMED_SHAPE |
2669 | && formal->as->type != AS_ASSUMED_RANK && !formal->attr.pointer) | |
fe4e525c TB |
2670 | || formal->attr.contiguous)) |
2671 | { | |
2672 | if (where) | |
c4100eae | 2673 | gfc_error ("Dummy argument %qs has to be a pointer, assumed-shape or " |
f188272d TB |
2674 | "assumed-rank array without CONTIGUOUS attribute - as actual" |
2675 | " argument at %L is not simply contiguous and both are " | |
2676 | "ASYNCHRONOUS or VOLATILE", formal->name, &actual->where); | |
f3e1097b | 2677 | return false; |
d3a9eea2 TB |
2678 | } |
2679 | ||
fc27115d | 2680 | if (formal->attr.allocatable && !codimension |
fec5ce24 | 2681 | && actual_attr.codimension) |
427180d2 TB |
2682 | { |
2683 | if (formal->attr.intent == INTENT_OUT) | |
2684 | { | |
2685 | if (where) | |
2686 | gfc_error ("Passing coarray at %L to allocatable, noncoarray, " | |
c4100eae | 2687 | "INTENT(OUT) dummy argument %qs", &actual->where, |
427180d2 | 2688 | formal->name); |
f3e1097b | 2689 | return false; |
427180d2 | 2690 | } |
73e42eef | 2691 | else if (warn_surprising && where && formal->attr.intent != INTENT_IN) |
48749dbc MLI |
2692 | gfc_warning (OPT_Wsurprising, |
2693 | "Passing coarray at %L to allocatable, noncoarray dummy " | |
2694 | "argument %qs, which is invalid if the allocation status" | |
427180d2 TB |
2695 | " is modified", &actual->where, formal->name); |
2696 | } | |
2697 | ||
c62c6622 TB |
2698 | /* If the rank is the same or the formal argument has assumed-rank. */ |
2699 | if (symbol_rank (formal) == actual->rank || symbol_rank (formal) == -1) | |
f3e1097b | 2700 | return true; |
6de9cd9a | 2701 | |
901edd99 HA |
2702 | rank_check = where != NULL && !is_elemental && formal_as |
2703 | && (formal_as->type == AS_ASSUMED_SHAPE | |
2704 | || formal_as->type == AS_DEFERRED) | |
2705 | && actual->expr_type != EXPR_NULL; | |
6de9cd9a | 2706 | |
e7ac6a7c TB |
2707 | /* Skip rank checks for NO_ARG_CHECK. */ |
2708 | if (formal->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK)) | |
f3e1097b | 2709 | return true; |
e7ac6a7c | 2710 | |
d3a9eea2 | 2711 | /* Scalar & coindexed, see: F2008, Section 12.5.2.4. */ |
d8a8dab3 TB |
2712 | if (rank_check || ranks_must_agree |
2713 | || (formal->attr.pointer && actual->expr_type != EXPR_NULL) | |
901edd99 HA |
2714 | || (actual->rank != 0 |
2715 | && !(is_elemental || formal->attr.dimension | |
2716 | || (formal->ts.type == BT_CLASS | |
2717 | && CLASS_DATA (formal)->attr.dimension))) | |
c49ea23d PT |
2718 | || (actual->rank == 0 |
2719 | && ((formal->ts.type == BT_CLASS | |
2720 | && CLASS_DATA (formal)->as->type == AS_ASSUMED_SHAPE) | |
2721 | || (formal->ts.type != BT_CLASS | |
2722 | && formal->as->type == AS_ASSUMED_SHAPE)) | |
08857b61 | 2723 | && actual->expr_type != EXPR_NULL) |
901edd99 HA |
2724 | || (actual->rank == 0 |
2725 | && (formal->attr.dimension | |
2726 | || (formal->ts.type == BT_CLASS | |
2727 | && CLASS_DATA (formal)->attr.dimension)) | |
7a40f2e7 SL |
2728 | && gfc_is_coindexed (actual)) |
2729 | /* Assumed-rank actual argument; F2018 C838. */ | |
2730 | || actual->rank == -1) | |
5ad6345e | 2731 | { |
a5baf71b | 2732 | if (where |
4a4fc7fe TK |
2733 | && (!formal->attr.artificial || (!formal->maybe_array |
2734 | && !maybe_dummy_array_arg (actual)))) | |
e0b9e5f9 TK |
2735 | { |
2736 | locus *where_formal; | |
2737 | if (formal->attr.artificial) | |
2738 | where_formal = &formal->declared_at; | |
2739 | else | |
2740 | where_formal = NULL; | |
2741 | ||
2742 | argument_rank_mismatch (formal->name, &actual->where, | |
2743 | symbol_rank (formal), actual->rank, | |
2744 | where_formal); | |
2745 | } | |
f3e1097b | 2746 | return false; |
5ad6345e | 2747 | } |
901edd99 HA |
2748 | else if (actual->rank != 0 |
2749 | && (is_elemental || formal->attr.dimension | |
2750 | || (formal->ts.type == BT_CLASS | |
2751 | && CLASS_DATA (formal)->attr.dimension))) | |
f3e1097b | 2752 | return true; |
5ad6345e TB |
2753 | |
2754 | /* At this point, we are considering a scalar passed to an array. This | |
975b975b | 2755 | is valid (cf. F95 12.4.1.1, F2003 12.4.1.2, and F2008 12.5.2.4), |
5ad6345e | 2756 | - if the actual argument is (a substring of) an element of a |
975b975b TB |
2757 | non-assumed-shape/non-pointer/non-polymorphic array; or |
2758 | - (F2003) if the actual argument is of type character of default/c_char | |
59f6dea9 TB |
2759 | kind. |
2760 | - (F2018) if the dummy argument is type(*). */ | |
975b975b TB |
2761 | |
2762 | is_pointer = actual->expr_type == EXPR_VARIABLE | |
2763 | ? actual->symtree->n.sym->attr.pointer : false; | |
6de9cd9a DN |
2764 | |
2765 | for (ref = actual->ref; ref; ref = ref->next) | |
975b975b TB |
2766 | { |
2767 | if (ref->type == REF_COMPONENT) | |
2768 | is_pointer = ref->u.c.component->attr.pointer; | |
2769 | else if (ref->type == REF_ARRAY && ref->u.ar.type == AR_ELEMENT | |
2770 | && ref->u.ar.dimen > 0 | |
8b704316 | 2771 | && (!ref->next |
975b975b TB |
2772 | || (ref->next->type == REF_SUBSTRING && !ref->next->next))) |
2773 | break; | |
2774 | } | |
2775 | ||
2776 | if (actual->ts.type == BT_CLASS && actual->expr_type != EXPR_NULL) | |
2777 | { | |
2778 | if (where) | |
c4100eae | 2779 | gfc_error ("Polymorphic scalar passed to array dummy argument %qs " |
975b975b | 2780 | "at %L", formal->name, &actual->where); |
f3e1097b | 2781 | return false; |
975b975b TB |
2782 | } |
2783 | ||
2784 | if (actual->expr_type != EXPR_NULL && ref && actual->ts.type != BT_CHARACTER | |
2785 | && (is_pointer || ref->u.ar.as->type == AS_ASSUMED_SHAPE)) | |
2786 | { | |
2787 | if (where) | |
4a4fc7fe TK |
2788 | { |
2789 | if (formal->attr.artificial) | |
2790 | gfc_error ("Element of assumed-shape or pointer array " | |
7260547d TK |
2791 | "as actual argument at %L cannot correspond to " |
2792 | "actual argument at %L", | |
4a4fc7fe TK |
2793 | &actual->where, &formal->declared_at); |
2794 | else | |
2795 | gfc_error ("Element of assumed-shape or pointer " | |
2796 | "array passed to array dummy argument %qs at %L", | |
2797 | formal->name, &actual->where); | |
2798 | } | |
f3e1097b | 2799 | return false; |
975b975b | 2800 | } |
6de9cd9a | 2801 | |
975b975b TB |
2802 | if (actual->ts.type == BT_CHARACTER && actual->expr_type != EXPR_NULL |
2803 | && (!ref || is_pointer || ref->u.ar.as->type == AS_ASSUMED_SHAPE)) | |
5ad6345e | 2804 | { |
975b975b TB |
2805 | if (formal->ts.kind != 1 && (gfc_option.allow_std & GFC_STD_GNU) == 0) |
2806 | { | |
2807 | if (where) | |
2808 | gfc_error ("Extension: Scalar non-default-kind, non-C_CHAR-kind " | |
2809 | "CHARACTER actual argument with array dummy argument " | |
c4100eae | 2810 | "%qs at %L", formal->name, &actual->where); |
f3e1097b | 2811 | return false; |
975b975b TB |
2812 | } |
2813 | ||
5ad6345e TB |
2814 | if (where && (gfc_option.allow_std & GFC_STD_F2003) == 0) |
2815 | { | |
2816 | gfc_error ("Fortran 2003: Scalar CHARACTER actual argument with " | |
c4100eae | 2817 | "array dummy argument %qs at %L", |
5ad6345e | 2818 | formal->name, &actual->where); |
f3e1097b | 2819 | return false; |
5ad6345e | 2820 | } |
5ad6345e | 2821 | else |
f3e1097b | 2822 | return ((gfc_option.allow_std & GFC_STD_F2003) != 0); |
5ad6345e | 2823 | } |
975b975b TB |
2824 | |
2825 | if (ref == NULL && actual->expr_type != EXPR_NULL) | |
5ad6345e | 2826 | { |
59f6dea9 TB |
2827 | if (actual->rank == 0 |
2828 | && formal->ts.type == BT_ASSUMED | |
2829 | && formal->as | |
2830 | && formal->as->type == AS_ASSUMED_SIZE) | |
2831 | /* This is new in F2018, type(*) is new in TS29113, but gfortran does | |
2832 | not differentiate. Thus, if type(*) exists, it is valid; | |
2833 | otherwise, type(*) is already rejected. */ | |
2834 | return true; | |
a5baf71b | 2835 | if (where |
4a4fc7fe TK |
2836 | && (!formal->attr.artificial || (!formal->maybe_array |
2837 | && !maybe_dummy_array_arg (actual)))) | |
e0b9e5f9 TK |
2838 | { |
2839 | locus *where_formal; | |
2840 | if (formal->attr.artificial) | |
2841 | where_formal = &formal->declared_at; | |
2842 | else | |
2843 | where_formal = NULL; | |
2844 | ||
2845 | argument_rank_mismatch (formal->name, &actual->where, | |
2846 | symbol_rank (formal), actual->rank, | |
2847 | where_formal); | |
2848 | } | |
f3e1097b | 2849 | return false; |
5ad6345e TB |
2850 | } |
2851 | ||
f3e1097b | 2852 | return true; |
6de9cd9a DN |
2853 | } |
2854 | ||
2855 | ||
2d5b90b2 TB |
2856 | /* Returns the storage size of a symbol (formal argument) or |
2857 | zero if it cannot be determined. */ | |
2858 | ||
2859 | static unsigned long | |
2860 | get_sym_storage_size (gfc_symbol *sym) | |
2861 | { | |
2862 | int i; | |
2863 | unsigned long strlen, elements; | |
2864 | ||
2865 | if (sym->ts.type == BT_CHARACTER) | |
2866 | { | |
bc21d315 | 2867 | if (sym->ts.u.cl && sym->ts.u.cl->length |
600956c8 HA |
2868 | && sym->ts.u.cl->length->expr_type == EXPR_CONSTANT |
2869 | && sym->ts.u.cl->length->ts.type == BT_INTEGER) | |
bc21d315 | 2870 | strlen = mpz_get_ui (sym->ts.u.cl->length->value.integer); |
2d5b90b2 TB |
2871 | else |
2872 | return 0; | |
2873 | } | |
2874 | else | |
8b704316 | 2875 | strlen = 1; |
2d5b90b2 TB |
2876 | |
2877 | if (symbol_rank (sym) == 0) | |
2878 | return strlen; | |
2879 | ||
2880 | elements = 1; | |
2881 | if (sym->as->type != AS_EXPLICIT) | |
2882 | return 0; | |
2883 | for (i = 0; i < sym->as->rank; i++) | |
2884 | { | |
efb63364 | 2885 | if (sym->as->upper[i]->expr_type != EXPR_CONSTANT |
600956c8 HA |
2886 | || sym->as->lower[i]->expr_type != EXPR_CONSTANT |
2887 | || sym->as->upper[i]->ts.type != BT_INTEGER | |
2888 | || sym->as->lower[i]->ts.type != BT_INTEGER) | |
2d5b90b2 TB |
2889 | return 0; |
2890 | ||
c13af44b SK |
2891 | elements *= mpz_get_si (sym->as->upper[i]->value.integer) |
2892 | - mpz_get_si (sym->as->lower[i]->value.integer) + 1L; | |
2d5b90b2 TB |
2893 | } |
2894 | ||
2895 | return strlen*elements; | |
2896 | } | |
2897 | ||
2898 | ||
2899 | /* Returns the storage size of an expression (actual argument) or | |
2900 | zero if it cannot be determined. For an array element, it returns | |
1207ac67 | 2901 | the remaining size as the element sequence consists of all storage |
2d5b90b2 TB |
2902 | units of the actual argument up to the end of the array. */ |
2903 | ||
2904 | static unsigned long | |
2905 | get_expr_storage_size (gfc_expr *e) | |
2906 | { | |
2907 | int i; | |
2908 | long int strlen, elements; | |
6da0839a | 2909 | long int substrlen = 0; |
a0710c29 | 2910 | bool is_str_storage = false; |
2d5b90b2 TB |
2911 | gfc_ref *ref; |
2912 | ||
2913 | if (e == NULL) | |
2914 | return 0; | |
8b704316 | 2915 | |
2d5b90b2 TB |
2916 | if (e->ts.type == BT_CHARACTER) |
2917 | { | |
bc21d315 | 2918 | if (e->ts.u.cl && e->ts.u.cl->length |
a7576037 HA |
2919 | && e->ts.u.cl->length->expr_type == EXPR_CONSTANT |
2920 | && e->ts.u.cl->length->ts.type == BT_INTEGER) | |
bc21d315 | 2921 | strlen = mpz_get_si (e->ts.u.cl->length->value.integer); |
2d5b90b2 | 2922 | else if (e->expr_type == EXPR_CONSTANT |
bc21d315 | 2923 | && (e->ts.u.cl == NULL || e->ts.u.cl->length == NULL)) |
2d5b90b2 TB |
2924 | strlen = e->value.character.length; |
2925 | else | |
2926 | return 0; | |
2927 | } | |
2928 | else | |
2929 | strlen = 1; /* Length per element. */ | |
2930 | ||
2931 | if (e->rank == 0 && !e->ref) | |
2932 | return strlen; | |
2933 | ||
2934 | elements = 1; | |
2935 | if (!e->ref) | |
2936 | { | |
2937 | if (!e->shape) | |
2938 | return 0; | |
2939 | for (i = 0; i < e->rank; i++) | |
2940 | elements *= mpz_get_si (e->shape[i]); | |
2941 | return elements*strlen; | |
2942 | } | |
2943 | ||
2944 | for (ref = e->ref; ref; ref = ref->next) | |
2945 | { | |
6da0839a TB |
2946 | if (ref->type == REF_SUBSTRING && ref->u.ss.start |
2947 | && ref->u.ss.start->expr_type == EXPR_CONSTANT) | |
2948 | { | |
a0710c29 TB |
2949 | if (is_str_storage) |
2950 | { | |
2951 | /* The string length is the substring length. | |
2952 | Set now to full string length. */ | |
e323640f | 2953 | if (!ref->u.ss.length || !ref->u.ss.length->length |
a0710c29 TB |
2954 | || ref->u.ss.length->length->expr_type != EXPR_CONSTANT) |
2955 | return 0; | |
2956 | ||
2957 | strlen = mpz_get_ui (ref->u.ss.length->length->value.integer); | |
2958 | } | |
2959 | substrlen = strlen - mpz_get_ui (ref->u.ss.start->value.integer) + 1; | |
6da0839a TB |
2960 | continue; |
2961 | } | |
2962 | ||
efb63364 | 2963 | if (ref->type == REF_ARRAY && ref->u.ar.type == AR_SECTION) |
2d5b90b2 TB |
2964 | for (i = 0; i < ref->u.ar.dimen; i++) |
2965 | { | |
2966 | long int start, end, stride; | |
2967 | stride = 1; | |
37639728 | 2968 | |
2d5b90b2 TB |
2969 | if (ref->u.ar.stride[i]) |
2970 | { | |
771d793d HA |
2971 | if (ref->u.ar.stride[i]->expr_type == EXPR_CONSTANT |
2972 | && ref->u.ar.stride[i]->ts.type == BT_INTEGER) | |
2d5b90b2 TB |
2973 | stride = mpz_get_si (ref->u.ar.stride[i]->value.integer); |
2974 | else | |
2975 | return 0; | |
2976 | } | |
2977 | ||
2978 | if (ref->u.ar.start[i]) | |
2979 | { | |
771d793d HA |
2980 | if (ref->u.ar.start[i]->expr_type == EXPR_CONSTANT |
2981 | && ref->u.ar.start[i]->ts.type == BT_INTEGER) | |
2d5b90b2 TB |
2982 | start = mpz_get_si (ref->u.ar.start[i]->value.integer); |
2983 | else | |
2984 | return 0; | |
2985 | } | |
37639728 | 2986 | else if (ref->u.ar.as->lower[i] |
771d793d HA |
2987 | && ref->u.ar.as->lower[i]->expr_type == EXPR_CONSTANT |
2988 | && ref->u.ar.as->lower[i]->ts.type == BT_INTEGER) | |
37639728 TB |
2989 | start = mpz_get_si (ref->u.ar.as->lower[i]->value.integer); |
2990 | else | |
2991 | return 0; | |
2d5b90b2 TB |
2992 | |
2993 | if (ref->u.ar.end[i]) | |
2994 | { | |
771d793d HA |
2995 | if (ref->u.ar.end[i]->expr_type == EXPR_CONSTANT |
2996 | && ref->u.ar.end[i]->ts.type == BT_INTEGER) | |
2d5b90b2 TB |
2997 | end = mpz_get_si (ref->u.ar.end[i]->value.integer); |
2998 | else | |
2999 | return 0; | |
3000 | } | |
3001 | else if (ref->u.ar.as->upper[i] | |
771d793d HA |
3002 | && ref->u.ar.as->upper[i]->expr_type == EXPR_CONSTANT |
3003 | && ref->u.ar.as->upper[i]->ts.type == BT_INTEGER) | |
2d5b90b2 TB |
3004 | end = mpz_get_si (ref->u.ar.as->upper[i]->value.integer); |
3005 | else | |
3006 | return 0; | |
3007 | ||
3008 | elements *= (end - start)/stride + 1L; | |
3009 | } | |
c6423ef3 | 3010 | else if (ref->type == REF_ARRAY && ref->u.ar.type == AR_FULL) |
2d5b90b2 TB |
3011 | for (i = 0; i < ref->u.ar.as->rank; i++) |
3012 | { | |
3013 | if (ref->u.ar.as->lower[i] && ref->u.ar.as->upper[i] | |
3014 | && ref->u.ar.as->lower[i]->expr_type == EXPR_CONSTANT | |
edcc76d5 SK |
3015 | && ref->u.ar.as->lower[i]->ts.type == BT_INTEGER |
3016 | && ref->u.ar.as->upper[i]->expr_type == EXPR_CONSTANT | |
3017 | && ref->u.ar.as->upper[i]->ts.type == BT_INTEGER) | |
da9ad923 TB |
3018 | elements *= mpz_get_si (ref->u.ar.as->upper[i]->value.integer) |
3019 | - mpz_get_si (ref->u.ar.as->lower[i]->value.integer) | |
2d5b90b2 TB |
3020 | + 1L; |
3021 | else | |
3022 | return 0; | |
3023 | } | |
6da0839a | 3024 | else if (ref->type == REF_ARRAY && ref->u.ar.type == AR_ELEMENT |
a0710c29 TB |
3025 | && e->expr_type == EXPR_VARIABLE) |
3026 | { | |
93302a24 | 3027 | if (ref->u.ar.as->type == AS_ASSUMED_SHAPE |
a0710c29 TB |
3028 | || e->symtree->n.sym->attr.pointer) |
3029 | { | |
3030 | elements = 1; | |
3031 | continue; | |
3032 | } | |
3033 | ||
3034 | /* Determine the number of remaining elements in the element | |
3035 | sequence for array element designators. */ | |
3036 | is_str_storage = true; | |
3037 | for (i = ref->u.ar.dimen - 1; i >= 0; i--) | |
3038 | { | |
3039 | if (ref->u.ar.start[i] == NULL | |
3040 | || ref->u.ar.start[i]->expr_type != EXPR_CONSTANT | |
3041 | || ref->u.ar.as->upper[i] == NULL | |
3042 | || ref->u.ar.as->lower[i] == NULL | |
3043 | || ref->u.ar.as->upper[i]->expr_type != EXPR_CONSTANT | |
771d793d HA |
3044 | || ref->u.ar.as->lower[i]->expr_type != EXPR_CONSTANT |
3045 | || ref->u.ar.as->upper[i]->ts.type != BT_INTEGER | |
3046 | || ref->u.ar.as->lower[i]->ts.type != BT_INTEGER) | |
a0710c29 TB |
3047 | return 0; |
3048 | ||
3049 | elements | |
3050 | = elements | |
3051 | * (mpz_get_si (ref->u.ar.as->upper[i]->value.integer) | |
3052 | - mpz_get_si (ref->u.ar.as->lower[i]->value.integer) | |
3053 | + 1L) | |
3054 | - (mpz_get_si (ref->u.ar.start[i]->value.integer) | |
3055 | - mpz_get_si (ref->u.ar.as->lower[i]->value.integer)); | |
3056 | } | |
3057 | } | |
3436db75 JW |
3058 | else if (ref->type == REF_COMPONENT && ref->u.c.component->attr.function |
3059 | && ref->u.c.component->attr.proc_pointer | |
3060 | && ref->u.c.component->attr.dimension) | |
3061 | { | |
3062 | /* Array-valued procedure-pointer components. */ | |
3063 | gfc_array_spec *as = ref->u.c.component->as; | |
3064 | for (i = 0; i < as->rank; i++) | |
3065 | { | |
3066 | if (!as->upper[i] || !as->lower[i] | |
3067 | || as->upper[i]->expr_type != EXPR_CONSTANT | |
771d793d HA |
3068 | || as->lower[i]->expr_type != EXPR_CONSTANT |
3069 | || as->upper[i]->ts.type != BT_INTEGER | |
3070 | || as->lower[i]->ts.type != BT_INTEGER) | |
3436db75 JW |
3071 | return 0; |
3072 | ||
3073 | elements = elements | |
3074 | * (mpz_get_si (as->upper[i]->value.integer) | |
3075 | - mpz_get_si (as->lower[i]->value.integer) + 1L); | |
3076 | } | |
3077 | } | |
2d5b90b2 TB |
3078 | } |
3079 | ||
6da0839a | 3080 | if (substrlen) |
a0710c29 TB |
3081 | return (is_str_storage) ? substrlen + (elements-1)*strlen |
3082 | : elements*strlen; | |
3083 | else | |
3084 | return elements*strlen; | |
2d5b90b2 TB |
3085 | } |
3086 | ||
3087 | ||
59be8071 | 3088 | /* Given an expression, check whether it is an array section |
f3e1097b | 3089 | which has a vector subscript. */ |
59be8071 | 3090 | |
f3e1097b | 3091 | bool |
03af1e4c | 3092 | gfc_has_vector_subscript (gfc_expr *e) |
59be8071 TB |
3093 | { |
3094 | int i; | |
3095 | gfc_ref *ref; | |
3096 | ||
3097 | if (e == NULL || e->rank == 0 || e->expr_type != EXPR_VARIABLE) | |
f3e1097b | 3098 | return false; |
59be8071 TB |
3099 | |
3100 | for (ref = e->ref; ref; ref = ref->next) | |
3101 | if (ref->type == REF_ARRAY && ref->u.ar.type == AR_SECTION) | |
3102 | for (i = 0; i < ref->u.ar.dimen; i++) | |
3103 | if (ref->u.ar.dimen_type[i] == DIMEN_VECTOR) | |
f3e1097b | 3104 | return true; |
59be8071 | 3105 | |
f3e1097b | 3106 | return false; |
59be8071 TB |
3107 | } |
3108 | ||
3109 | ||
4294c093 JW |
3110 | static bool |
3111 | is_procptr_result (gfc_expr *expr) | |
3112 | { | |
3113 | gfc_component *c = gfc_get_proc_ptr_comp (expr); | |
3114 | if (c) | |
3115 | return (c->ts.interface && (c->ts.interface->attr.proc_pointer == 1)); | |
3116 | else | |
3117 | return ((expr->symtree->n.sym->result != expr->symtree->n.sym) | |
3118 | && (expr->symtree->n.sym->result->attr.proc_pointer == 1)); | |
3119 | } | |
3120 | ||
3121 | ||
bcc478b9 BRF |
3122 | /* Recursively append candidate argument ARG to CANDIDATES. Store the |
3123 | number of total candidates in CANDIDATES_LEN. */ | |
3124 | ||
3125 | static void | |
3126 | lookup_arg_fuzzy_find_candidates (gfc_formal_arglist *arg, | |
3127 | char **&candidates, | |
3128 | size_t &candidates_len) | |
3129 | { | |
3130 | for (gfc_formal_arglist *p = arg; p && p->sym; p = p->next) | |
3131 | vec_push (candidates, candidates_len, p->sym->name); | |
3132 | } | |
3133 | ||
3134 | ||
3135 | /* Lookup argument ARG fuzzily, taking names in ARGUMENTS into account. */ | |
3136 | ||
3137 | static const char* | |
3138 | lookup_arg_fuzzy (const char *arg, gfc_formal_arglist *arguments) | |
3139 | { | |
3140 | char **candidates = NULL; | |
3141 | size_t candidates_len = 0; | |
3142 | lookup_arg_fuzzy_find_candidates (arguments, candidates, candidates_len); | |
3143 | return gfc_closest_fuzzy_match (arg, candidates); | |
3144 | } | |
3145 | ||
3146 | ||
5888512f MM |
3147 | static gfc_dummy_arg * |
3148 | get_nonintrinsic_dummy_arg (gfc_formal_arglist *formal) | |
3149 | { | |
3150 | gfc_dummy_arg * const dummy_arg = gfc_get_dummy_arg (); | |
3151 | ||
3152 | dummy_arg->intrinsicness = GFC_NON_INTRINSIC_DUMMY_ARG; | |
3153 | dummy_arg->u.non_intrinsic = formal; | |
3154 | ||
3155 | return dummy_arg; | |
3156 | } | |
3157 | ||
3158 | ||
6de9cd9a DN |
3159 | /* Given formal and actual argument lists, see if they are compatible. |
3160 | If they are compatible, the actual argument list is sorted to | |
3161 | correspond with the formal list, and elements for missing optional | |
3162 | arguments are inserted. If WHERE pointer is nonnull, then we issue | |
3163 | errors when things don't match instead of just returning the status | |
3164 | code. */ | |
3165 | ||
e68a35ae TK |
3166 | bool |
3167 | gfc_compare_actual_formal (gfc_actual_arglist **ap, gfc_formal_arglist *formal, | |
3168 | int ranks_must_agree, int is_elemental, | |
3169 | bool in_statement_function, locus *where) | |
6de9cd9a | 3170 | { |
fab27f52 | 3171 | gfc_actual_arglist **new_arg, *a, *actual; |
6de9cd9a DN |
3172 | gfc_formal_arglist *f; |
3173 | int i, n, na; | |
2d5b90b2 | 3174 | unsigned long actual_size, formal_size; |
c49ea23d | 3175 | bool full_array = false; |
eb401400 | 3176 | gfc_array_ref *actual_arr_ref; |
7afb6108 SL |
3177 | gfc_array_spec *fas, *aas; |
3178 | bool pointer_dummy, pointer_arg, allocatable_arg; | |
6de9cd9a | 3179 | |
ee11be7f SL |
3180 | bool ok = true; |
3181 | ||
6de9cd9a DN |
3182 | actual = *ap; |
3183 | ||
3184 | if (actual == NULL && formal == NULL) | |
f3e1097b | 3185 | return true; |
6de9cd9a DN |
3186 | |
3187 | n = 0; | |
3188 | for (f = formal; f; f = f->next) | |
3189 | n++; | |
3190 | ||
1145e690 | 3191 | new_arg = XALLOCAVEC (gfc_actual_arglist *, n); |
6de9cd9a DN |
3192 | |
3193 | for (i = 0; i < n; i++) | |
7b901ac4 | 3194 | new_arg[i] = NULL; |
6de9cd9a DN |
3195 | |
3196 | na = 0; | |
3197 | f = formal; | |
3198 | i = 0; | |
3199 | ||
3200 | for (a = actual; a; a = a->next, f = f->next) | |
3201 | { | |
3453b6aa SK |
3202 | if (a->name != NULL && in_statement_function) |
3203 | { | |
3204 | gfc_error ("Keyword argument %qs at %L is invalid in " | |
3205 | "a statement function", a->name, &a->expr->where); | |
3206 | return false; | |
3207 | } | |
3208 | ||
7fcafa71 PT |
3209 | /* Look for keywords but ignore g77 extensions like %VAL. */ |
3210 | if (a->name != NULL && a->name[0] != '%') | |
6de9cd9a DN |
3211 | { |
3212 | i = 0; | |
3213 | for (f = formal; f; f = f->next, i++) | |
3214 | { | |
3215 | if (f->sym == NULL) | |
3216 | continue; | |
3217 | if (strcmp (f->sym->name, a->name) == 0) | |
3218 | break; | |
3219 | } | |
3220 | ||
3221 | if (f == NULL) | |
3222 | { | |
3223 | if (where) | |
bcc478b9 BRF |
3224 | { |
3225 | const char *guessed = lookup_arg_fuzzy (a->name, formal); | |
3226 | if (guessed) | |
3227 | gfc_error ("Keyword argument %qs at %L is not in " | |
3228 | "the procedure; did you mean %qs?", | |
3229 | a->name, &a->expr->where, guessed); | |
3230 | else | |
3231 | gfc_error ("Keyword argument %qs at %L is not in " | |
3232 | "the procedure", a->name, &a->expr->where); | |
3233 | } | |
f3e1097b | 3234 | return false; |
6de9cd9a DN |
3235 | } |
3236 | ||
7b901ac4 | 3237 | if (new_arg[i] != NULL) |
6de9cd9a DN |
3238 | { |
3239 | if (where) | |
c4100eae | 3240 | gfc_error ("Keyword argument %qs at %L is already associated " |
b251af97 SK |
3241 | "with another actual argument", a->name, |
3242 | &a->expr->where); | |
f3e1097b | 3243 | return false; |
6de9cd9a DN |
3244 | } |
3245 | } | |
3246 | ||
3247 | if (f == NULL) | |
3248 | { | |
3249 | if (where) | |
b251af97 SK |
3250 | gfc_error ("More actual than formal arguments in procedure " |
3251 | "call at %L", where); | |
f3e1097b | 3252 | return false; |
6de9cd9a DN |
3253 | } |
3254 | ||
3255 | if (f->sym == NULL && a->expr == NULL) | |
3256 | goto match; | |
3257 | ||
3258 | if (f->sym == NULL) | |
3259 | { | |
866664a3 TK |
3260 | /* These errors have to be issued, otherwise an ICE can occur. |
3261 | See PR 78865. */ | |
6de9cd9a | 3262 | if (where) |
866664a3 TK |
3263 | gfc_error_now ("Missing alternate return specifier in subroutine " |
3264 | "call at %L", where); | |
f3e1097b | 3265 | return false; |
6de9cd9a | 3266 | } |
5888512f MM |
3267 | else |
3268 | a->associated_dummy = get_nonintrinsic_dummy_arg (f); | |
6de9cd9a DN |
3269 | |
3270 | if (a->expr == NULL) | |
3271 | { | |
fb078366 TK |
3272 | if (f->sym->attr.optional) |
3273 | continue; | |
3274 | else | |
3275 | { | |
3276 | if (where) | |
3277 | gfc_error_now ("Unexpected alternate return specifier in " | |
3278 | "subroutine call at %L", where); | |
3279 | return false; | |
3280 | } | |
6de9cd9a | 3281 | } |
08857b61 | 3282 | |
8b704316 PT |
3283 | /* Make sure that intrinsic vtables exist for calls to unlimited |
3284 | polymorphic formal arguments. */ | |
524af0d6 | 3285 | if (UNLIMITED_POLY (f->sym) |
8b704316 | 3286 | && a->expr->ts.type != BT_DERIVED |
15e5858f TK |
3287 | && a->expr->ts.type != BT_CLASS |
3288 | && a->expr->ts.type != BT_ASSUMED) | |
7289d1c9 | 3289 | gfc_find_vtab (&a->expr->ts); |
8b704316 | 3290 | |
99091b70 TB |
3291 | if (a->expr->expr_type == EXPR_NULL |
3292 | && ((f->sym->ts.type != BT_CLASS && !f->sym->attr.pointer | |
3293 | && (f->sym->attr.allocatable || !f->sym->attr.optional | |
3294 | || (gfc_option.allow_std & GFC_STD_F2008) == 0)) | |
3295 | || (f->sym->ts.type == BT_CLASS | |
3296 | && !CLASS_DATA (f->sym)->attr.class_pointer | |
3297 | && (CLASS_DATA (f->sym)->attr.allocatable | |
3298 | || !f->sym->attr.optional | |
3299 | || (gfc_option.allow_std & GFC_STD_F2008) == 0)))) | |
08857b61 | 3300 | { |
99091b70 TB |
3301 | if (where |
3302 | && (!f->sym->attr.optional | |
3303 | || (f->sym->ts.type != BT_CLASS && f->sym->attr.allocatable) | |
3304 | || (f->sym->ts.type == BT_CLASS | |
3305 | && CLASS_DATA (f->sym)->attr.allocatable))) | |
c4100eae | 3306 | gfc_error ("Unexpected NULL() intrinsic at %L to dummy %qs", |
08857b61 TB |
3307 | where, f->sym->name); |
3308 | else if (where) | |
3309 | gfc_error ("Fortran 2008: Null pointer at %L to non-pointer " | |
c4100eae | 3310 | "dummy %qs", where, f->sym->name); |
ee11be7f SL |
3311 | ok = false; |
3312 | goto match; | |
08857b61 | 3313 | } |
8b704316 | 3314 | |
5ad6345e TB |
3315 | if (!compare_parameter (f->sym, a->expr, ranks_must_agree, |
3316 | is_elemental, where)) | |
ee11be7f SL |
3317 | { |
3318 | ok = false; | |
3319 | goto match; | |
3320 | } | |
6de9cd9a | 3321 | |
5098e707 | 3322 | /* TS 29113, 6.3p2; F2018 15.5.2.4. */ |
45a69325 TB |
3323 | if (f->sym->ts.type == BT_ASSUMED |
3324 | && (a->expr->ts.type == BT_DERIVED | |
3325 | || (a->expr->ts.type == BT_CLASS && CLASS_DATA (a->expr)))) | |
3326 | { | |
5098e707 SL |
3327 | gfc_symbol *derived = (a->expr->ts.type == BT_DERIVED |
3328 | ? a->expr->ts.u.derived | |
3329 | : CLASS_DATA (a->expr)->ts.u.derived); | |
3330 | gfc_namespace *f2k_derived = derived->f2k_derived; | |
3331 | if (derived->attr.pdt_type | |
3332 | || (f2k_derived | |
3333 | && (f2k_derived->finalizers || f2k_derived->tb_sym_root))) | |
45a69325 | 3334 | { |
5098e707 SL |
3335 | gfc_error ("Actual argument at %L to assumed-type dummy " |
3336 | "has type parameters or is of " | |
45a69325 TB |
3337 | "derived type with type-bound or FINAL procedures", |
3338 | &a->expr->where); | |
ee11be7f SL |
3339 | ok = false; |
3340 | goto match; | |
45a69325 TB |
3341 | } |
3342 | } | |
3343 | ||
6c95fe9b PT |
3344 | if (UNLIMITED_POLY (a->expr) |
3345 | && !(f->sym->ts.type == BT_ASSUMED || UNLIMITED_POLY (f->sym))) | |
3346 | { | |
3347 | gfc_error ("Unlimited polymorphic actual argument at %L is not " | |
3348 | "matched with either an unlimited polymorphic or " | |
3349 | "assumed type dummy argument", &a->expr->where); | |
3350 | ok = false; | |
3351 | goto match; | |
3352 | } | |
3353 | ||
a0710c29 TB |
3354 | /* Special case for character arguments. For allocatable, pointer |
3355 | and assumed-shape dummies, the string length needs to match | |
3356 | exactly. */ | |
2d5b90b2 | 3357 | if (a->expr->ts.type == BT_CHARACTER |
eb401400 AV |
3358 | && a->expr->ts.u.cl && a->expr->ts.u.cl->length |
3359 | && a->expr->ts.u.cl->length->expr_type == EXPR_CONSTANT | |
bdd784fc | 3360 | && a->expr->ts.u.cl->length->ts.type == BT_INTEGER |
eb401400 AV |
3361 | && f->sym->ts.type == BT_CHARACTER && f->sym->ts.u.cl |
3362 | && f->sym->ts.u.cl->length | |
3363 | && f->sym->ts.u.cl->length->expr_type == EXPR_CONSTANT | |
bdd784fc | 3364 | && f->sym->ts.u.cl->length->ts.type == BT_INTEGER |
eb401400 AV |
3365 | && (f->sym->attr.pointer || f->sym->attr.allocatable |
3366 | || (f->sym->as && f->sym->as->type == AS_ASSUMED_SHAPE)) | |
3367 | && (mpz_cmp (a->expr->ts.u.cl->length->value.integer, | |
3368 | f->sym->ts.u.cl->length->value.integer) != 0)) | |
3369 | { | |
3370 | if (where && (f->sym->attr.pointer || f->sym->attr.allocatable)) | |
e0b9e5f9 | 3371 | gfc_warning (0, "Character length mismatch (%ld/%ld) between actual " |
eb401400 AV |
3372 | "argument and pointer or allocatable dummy argument " |
3373 | "%qs at %L", | |
3374 | mpz_get_si (a->expr->ts.u.cl->length->value.integer), | |
3375 | mpz_get_si (f->sym->ts.u.cl->length->value.integer), | |
3376 | f->sym->name, &a->expr->where); | |
3377 | else if (where) | |
e0b9e5f9 | 3378 | gfc_warning (0, "Character length mismatch (%ld/%ld) between actual " |
eb401400 AV |
3379 | "argument and assumed-shape dummy argument %qs " |
3380 | "at %L", | |
3381 | mpz_get_si (a->expr->ts.u.cl->length->value.integer), | |
3382 | mpz_get_si (f->sym->ts.u.cl->length->value.integer), | |
3383 | f->sym->name, &a->expr->where); | |
ee11be7f SL |
3384 | ok = false; |
3385 | goto match; | |
eb401400 | 3386 | } |
a0324f7b | 3387 | |
8d51f26f | 3388 | if ((f->sym->attr.pointer || f->sym->attr.allocatable) |
eb401400 AV |
3389 | && f->sym->ts.deferred != a->expr->ts.deferred |
3390 | && a->expr->ts.type == BT_CHARACTER) | |
8d51f26f PT |
3391 | { |
3392 | if (where) | |
0c133211 | 3393 | gfc_error ("Actual argument at %L to allocatable or " |
c4100eae | 3394 | "pointer dummy argument %qs must have a deferred " |
8d51f26f PT |
3395 | "length type parameter if and only if the dummy has one", |
3396 | &a->expr->where, f->sym->name); | |
ee11be7f SL |
3397 | ok = false; |
3398 | goto match; | |
8d51f26f PT |
3399 | } |
3400 | ||
c49ea23d PT |
3401 | if (f->sym->ts.type == BT_CLASS) |
3402 | goto skip_size_check; | |
3403 | ||
37639728 TB |
3404 | actual_size = get_expr_storage_size (a->expr); |
3405 | formal_size = get_sym_storage_size (f->sym); | |
93302a24 JW |
3406 | if (actual_size != 0 && actual_size < formal_size |
3407 | && a->expr->ts.type != BT_PROCEDURE | |
3408 | && f->sym->attr.flavor != FL_PROCEDURE) | |
2d5b90b2 TB |
3409 | { |
3410 | if (a->expr->ts.type == BT_CHARACTER && !f->sym->as && where) | |
a8b79cc9 HA |
3411 | { |
3412 | gfc_warning (0, "Character length of actual argument shorter " | |
3413 | "than of dummy argument %qs (%lu/%lu) at %L", | |
3414 | f->sym->name, actual_size, formal_size, | |
3415 | &a->expr->where); | |
3416 | goto skip_size_check; | |
3417 | } | |
2d5b90b2 | 3418 | else if (where) |
37d92a7e DH |
3419 | { |
3420 | /* Emit a warning for -std=legacy and an error otherwise. */ | |
3421 | if (gfc_option.warn_std == 0) | |
e0b9e5f9 | 3422 | gfc_warning (0, "Actual argument contains too few " |
37d92a7e DH |
3423 | "elements for dummy argument %qs (%lu/%lu) " |
3424 | "at %L", f->sym->name, actual_size, | |
3425 | formal_size, &a->expr->where); | |
3426 | else | |
3427 | gfc_error_now ("Actual argument contains too few " | |
3428 | "elements for dummy argument %qs (%lu/%lu) " | |
3429 | "at %L", f->sym->name, actual_size, | |
3430 | formal_size, &a->expr->where); | |
3431 | } | |
ee11be7f SL |
3432 | ok = false; |
3433 | goto match; | |
2d5b90b2 TB |
3434 | } |
3435 | ||
c49ea23d PT |
3436 | skip_size_check: |
3437 | ||
e9355cc3 JW |
3438 | /* Satisfy F03:12.4.1.3 by ensuring that a procedure pointer actual |
3439 | argument is provided for a procedure pointer formal argument. */ | |
8fb74da4 | 3440 | if (f->sym->attr.proc_pointer |
a7c0b11d | 3441 | && !((a->expr->expr_type == EXPR_VARIABLE |
4294c093 JW |
3442 | && (a->expr->symtree->n.sym->attr.proc_pointer |
3443 | || gfc_is_proc_ptr_comp (a->expr))) | |
a7c0b11d | 3444 | || (a->expr->expr_type == EXPR_FUNCTION |
4294c093 | 3445 | && is_procptr_result (a->expr)))) |
8fb74da4 JW |
3446 | { |
3447 | if (where) | |
c4100eae | 3448 | gfc_error ("Expected a procedure pointer for argument %qs at %L", |
8fb74da4 | 3449 | f->sym->name, &a->expr->where); |
ee11be7f SL |
3450 | ok = false; |
3451 | goto match; | |
8fb74da4 JW |
3452 | } |
3453 | ||
e9355cc3 | 3454 | /* Satisfy F03:12.4.1.3 by ensuring that a procedure actual argument is |
699fa7aa | 3455 | provided for a procedure formal argument. */ |
e9355cc3 | 3456 | if (f->sym->attr.flavor == FL_PROCEDURE |
4294c093 JW |
3457 | && !((a->expr->expr_type == EXPR_VARIABLE |
3458 | && (a->expr->symtree->n.sym->attr.flavor == FL_PROCEDURE | |
3459 | || a->expr->symtree->n.sym->attr.proc_pointer | |
3460 | || gfc_is_proc_ptr_comp (a->expr))) | |
3461 | || (a->expr->expr_type == EXPR_FUNCTION | |
3462 | && is_procptr_result (a->expr)))) | |
699fa7aa | 3463 | { |
9914f8cf | 3464 | if (where) |
c4100eae | 3465 | gfc_error ("Expected a procedure for argument %qs at %L", |
9914f8cf | 3466 | f->sym->name, &a->expr->where); |
ee11be7f SL |
3467 | ok = false; |
3468 | goto match; | |
699fa7aa PT |
3469 | } |
3470 | ||
7afb6108 SL |
3471 | /* Class array variables and expressions store array info in a |
3472 | different place from non-class objects; consolidate the logic | |
3473 | to access it here instead of repeating it below. Note that | |
3474 | pointer_arg and allocatable_arg are not fully general and are | |
3475 | only used in a specific situation below with an assumed-rank | |
3476 | argument. */ | |
3477 | if (f->sym->ts.type == BT_CLASS && CLASS_DATA (f->sym)) | |
3478 | { | |
3479 | gfc_component *classdata = CLASS_DATA (f->sym); | |
3480 | fas = classdata->as; | |
3481 | pointer_dummy = classdata->attr.class_pointer; | |
3482 | } | |
3483 | else | |
3484 | { | |
3485 | fas = f->sym->as; | |
3486 | pointer_dummy = f->sym->attr.pointer; | |
3487 | } | |
3488 | ||
3489 | if (a->expr->expr_type != EXPR_VARIABLE) | |
3490 | { | |
3491 | aas = NULL; | |
3492 | pointer_arg = false; | |
3493 | allocatable_arg = false; | |
3494 | } | |
3495 | else if (a->expr->ts.type == BT_CLASS | |
3496 | && a->expr->symtree->n.sym | |
3497 | && CLASS_DATA (a->expr->symtree->n.sym)) | |
3498 | { | |
3499 | gfc_component *classdata = CLASS_DATA (a->expr->symtree->n.sym); | |
3500 | aas = classdata->as; | |
3501 | pointer_arg = classdata->attr.class_pointer; | |
3502 | allocatable_arg = classdata->attr.allocatable; | |
3503 | } | |
3504 | else | |
3505 | { | |
3506 | aas = a->expr->symtree->n.sym->as; | |
3507 | pointer_arg = a->expr->symtree->n.sym->attr.pointer; | |
3508 | allocatable_arg = a->expr->symtree->n.sym->attr.allocatable; | |
3509 | } | |
3510 | ||
3511 | /* F2018:9.5.2(2) permits assumed-size whole array expressions as | |
3512 | actual arguments only if the shape is not required; thus it | |
3513 | cannot be passed to an assumed-shape array dummy. | |
3514 | F2018:15.5.2.(2) permits passing a nonpointer actual to an | |
3515 | intent(in) pointer dummy argument and this is accepted by | |
3516 | the compare_pointer check below, but this also requires shape | |
3517 | information. | |
3518 | There's more discussion of this in PR94110. */ | |
3519 | if (fas | |
3520 | && (fas->type == AS_ASSUMED_SHAPE | |
3521 | || fas->type == AS_DEFERRED | |
3522 | || (fas->type == AS_ASSUMED_RANK && pointer_dummy)) | |
3523 | && aas | |
3524 | && aas->type == AS_ASSUMED_SIZE | |
bf9d2177 JJ |
3525 | && (a->expr->ref == NULL |
3526 | || (a->expr->ref->type == REF_ARRAY | |
3527 | && a->expr->ref->u.ar.type == AR_FULL))) | |
3528 | { | |
3529 | if (where) | |
c4100eae | 3530 | gfc_error ("Actual argument for %qs cannot be an assumed-size" |
bf9d2177 | 3531 | " array at %L", f->sym->name, where); |
ee11be7f SL |
3532 | ok = false; |
3533 | goto match; | |
bf9d2177 JJ |
3534 | } |
3535 | ||
7afb6108 SL |
3536 | /* Diagnose F2018 C839 (TS29113 C535c). Here the problem is |
3537 | passing an assumed-size array to an INTENT(OUT) assumed-rank | |
3538 | dummy when it doesn't have the size information needed to run | |
3539 | initializers and finalizers. */ | |
3540 | if (f->sym->attr.intent == INTENT_OUT | |
3541 | && fas | |
3542 | && fas->type == AS_ASSUMED_RANK | |
3543 | && aas | |
3544 | && ((aas->type == AS_ASSUMED_SIZE | |
3545 | && (a->expr->ref == NULL | |
3546 | || (a->expr->ref->type == REF_ARRAY | |
3547 | && a->expr->ref->u.ar.type == AR_FULL))) | |
3548 | || (aas->type == AS_ASSUMED_RANK | |
3549 | && !pointer_arg | |
3550 | && !allocatable_arg)) | |
3551 | && (a->expr->ts.type == BT_CLASS | |
3552 | || (a->expr->ts.type == BT_DERIVED | |
3553 | && (gfc_is_finalizable (a->expr->ts.u.derived, NULL) | |
3554 | || gfc_has_ultimate_allocatable (a->expr) | |
3555 | || gfc_has_default_initializer | |
3556 | (a->expr->ts.u.derived))))) | |
3557 | { | |
3558 | if (where) | |
3559 | gfc_error ("Actual argument to assumed-rank INTENT(OUT) " | |
3560 | "dummy %qs at %L cannot be of unknown size", | |
3561 | f->sym->name, where); | |
ee11be7f SL |
3562 | ok = false; |
3563 | goto match; | |
7afb6108 SL |
3564 | } |
3565 | ||
58e7732a | 3566 | if (a->expr->expr_type != EXPR_NULL) |
6de9cd9a | 3567 | { |
58e7732a JRFS |
3568 | int cmp = compare_pointer (f->sym, a->expr); |
3569 | bool pre2008 = ((gfc_option.allow_std & GFC_STD_F2008) == 0); | |
6de9cd9a | 3570 | |
58e7732a JRFS |
3571 | if (pre2008 && cmp == 0) |
3572 | { | |
3573 | if (where) | |
3574 | gfc_error ("Actual argument for %qs at %L must be a pointer", | |
3575 | f->sym->name, &a->expr->where); | |
3576 | ok = false; | |
3577 | goto match; | |
3578 | } | |
3579 | ||
3580 | if (pre2008 && cmp == 2) | |
3581 | { | |
3582 | if (where) | |
3583 | gfc_error ("Fortran 2008: Non-pointer actual argument at %L to " | |
3584 | "pointer dummy %qs", &a->expr->where, f->sym->name); | |
3585 | ok = false; | |
3586 | goto match; | |
3587 | } | |
3588 | ||
3589 | if (!pre2008 && cmp == 0) | |
3590 | { | |
3591 | if (where) | |
3592 | gfc_error ("Actual argument for %qs at %L must be a pointer " | |
3593 | "or a valid target for the dummy pointer in a " | |
3594 | "pointer assignment statement", | |
3595 | f->sym->name, &a->expr->where); | |
3596 | ok = false; | |
3597 | goto match; | |
3598 | } | |
7d54ef80 | 3599 | } |
8b704316 | 3600 | |
7d54ef80 | 3601 | |
d3a9eea2 TB |
3602 | /* Fortran 2008, C1242. */ |
3603 | if (f->sym->attr.pointer && gfc_is_coindexed (a->expr)) | |
3604 | { | |
3605 | if (where) | |
3606 | gfc_error ("Coindexed actual argument at %L to pointer " | |
c4100eae | 3607 | "dummy %qs", |
d3a9eea2 | 3608 | &a->expr->where, f->sym->name); |
ee11be7f SL |
3609 | ok = false; |
3610 | goto match; | |
d3a9eea2 TB |
3611 | } |
3612 | ||
3613 | /* Fortran 2008, 12.5.2.5 (no constraint). */ | |
3614 | if (a->expr->expr_type == EXPR_VARIABLE | |
3615 | && f->sym->attr.intent != INTENT_IN | |
3616 | && f->sym->attr.allocatable | |
3617 | && gfc_is_coindexed (a->expr)) | |
3618 | { | |
3619 | if (where) | |
3620 | gfc_error ("Coindexed actual argument at %L to allocatable " | |
c4100eae | 3621 | "dummy %qs requires INTENT(IN)", |
d3a9eea2 | 3622 | &a->expr->where, f->sym->name); |
ee11be7f SL |
3623 | ok = false; |
3624 | goto match; | |
d3a9eea2 TB |
3625 | } |
3626 | ||
3627 | /* Fortran 2008, C1237. */ | |
3628 | if (a->expr->expr_type == EXPR_VARIABLE | |
3629 | && (f->sym->attr.asynchronous || f->sym->attr.volatile_) | |
3630 | && gfc_is_coindexed (a->expr) | |
3631 | && (a->expr->symtree->n.sym->attr.volatile_ | |
3632 | || a->expr->symtree->n.sym->attr.asynchronous)) | |
3633 | { | |
3634 | if (where) | |
3635 | gfc_error ("Coindexed ASYNCHRONOUS or VOLATILE actual argument at " | |
c4100eae | 3636 | "%L requires that dummy %qs has neither " |
d3a9eea2 TB |
3637 | "ASYNCHRONOUS nor VOLATILE", &a->expr->where, |
3638 | f->sym->name); | |
ee11be7f SL |
3639 | ok = false; |
3640 | goto match; | |
d3a9eea2 TB |
3641 | } |
3642 | ||
3643 | /* Fortran 2008, 12.5.2.4 (no constraint). */ | |
3644 | if (a->expr->expr_type == EXPR_VARIABLE | |
3645 | && f->sym->attr.intent != INTENT_IN && !f->sym->attr.value | |
3646 | && gfc_is_coindexed (a->expr) | |
3647 | && gfc_has_ultimate_allocatable (a->expr)) | |
3648 | { | |
3649 | if (where) | |
3650 | gfc_error ("Coindexed actual argument at %L with allocatable " | |
c4100eae | 3651 | "ultimate component to dummy %qs requires either VALUE " |
d3a9eea2 | 3652 | "or INTENT(IN)", &a->expr->where, f->sym->name); |
ee11be7f SL |
3653 | ok = false; |
3654 | goto match; | |
d3a9eea2 TB |
3655 | } |
3656 | ||
c49ea23d PT |
3657 | if (f->sym->ts.type == BT_CLASS |
3658 | && CLASS_DATA (f->sym)->attr.allocatable | |
3659 | && gfc_is_class_array_ref (a->expr, &full_array) | |
3660 | && !full_array) | |
3661 | { | |
3662 | if (where) | |
c4100eae | 3663 | gfc_error ("Actual CLASS array argument for %qs must be a full " |
c49ea23d | 3664 | "array at %L", f->sym->name, &a->expr->where); |
ee11be7f SL |
3665 | ok = false; |
3666 | goto match; | |
c49ea23d PT |
3667 | } |
3668 | ||
3669 | ||
aa08038d | 3670 | if (a->expr->expr_type != EXPR_NULL |
f3e1097b | 3671 | && !compare_allocatable (f->sym, a->expr)) |
aa08038d EE |
3672 | { |
3673 | if (where) | |
c4100eae | 3674 | gfc_error ("Actual argument for %qs must be ALLOCATABLE at %L", |
aa08038d | 3675 | f->sym->name, &a->expr->where); |
ee11be7f SL |
3676 | ok = false; |
3677 | goto match; | |
aa08038d EE |
3678 | } |
3679 | ||
eb385a48 HA |
3680 | if (a->expr->expr_type == EXPR_FUNCTION |
3681 | && a->expr->value.function.esym | |
3682 | && f->sym->attr.allocatable) | |
3683 | { | |
3684 | if (where) | |
3685 | gfc_error ("Actual argument for %qs at %L is a function result " | |
3686 | "and the dummy argument is ALLOCATABLE", | |
3687 | f->sym->name, &a->expr->where); | |
3688 | ok = false; | |
3689 | goto match; | |
3690 | } | |
3691 | ||
a920e94a | 3692 | /* Check intent = OUT/INOUT for definable actual argument. */ |
f3883269 SK |
3693 | if (!in_statement_function |
3694 | && (f->sym->attr.intent == INTENT_OUT | |
3695 | || f->sym->attr.intent == INTENT_INOUT)) | |
a920e94a | 3696 | { |
8c91ab34 DK |
3697 | const char* context = (where |
3698 | ? _("actual argument to INTENT = OUT/INOUT") | |
3699 | : NULL); | |
a920e94a | 3700 | |
bcb4ad36 TB |
3701 | if (((f->sym->ts.type == BT_CLASS && f->sym->attr.class_ok |
3702 | && CLASS_DATA (f->sym)->attr.class_pointer) | |
3703 | || (f->sym->ts.type != BT_CLASS && f->sym->attr.pointer)) | |
524af0d6 | 3704 | && !gfc_check_vardef_context (a->expr, true, false, false, context)) |
ee11be7f SL |
3705 | { |
3706 | ok = false; | |
3707 | goto match; | |
3708 | } | |
524af0d6 | 3709 | if (!gfc_check_vardef_context (a->expr, false, false, false, context)) |
ee11be7f SL |
3710 | { |
3711 | ok = false; | |
3712 | goto match; | |
3713 | } | |
ee7e677f TB |
3714 | } |
3715 | ||
59be8071 TB |
3716 | if ((f->sym->attr.intent == INTENT_OUT |
3717 | || f->sym->attr.intent == INTENT_INOUT | |
84efddb2 DF |
3718 | || f->sym->attr.volatile_ |
3719 | || f->sym->attr.asynchronous) | |
03af1e4c | 3720 | && gfc_has_vector_subscript (a->expr)) |
59be8071 TB |
3721 | { |
3722 | if (where) | |
84efddb2 DF |
3723 | gfc_error ("Array-section actual argument with vector " |
3724 | "subscripts at %L is incompatible with INTENT(OUT), " | |
3725 | "INTENT(INOUT), VOLATILE or ASYNCHRONOUS attribute " | |
c4100eae | 3726 | "of the dummy argument %qs", |
59be8071 | 3727 | &a->expr->where, f->sym->name); |
ee11be7f SL |
3728 | ok = false; |
3729 | goto match; | |
59be8071 TB |
3730 | } |
3731 | ||
9bce3c1c TB |
3732 | /* C1232 (R1221) For an actual argument which is an array section or |
3733 | an assumed-shape array, the dummy argument shall be an assumed- | |
3734 | shape array, if the dummy argument has the VOLATILE attribute. */ | |
3735 | ||
3736 | if (f->sym->attr.volatile_ | |
271dd55c | 3737 | && a->expr->expr_type == EXPR_VARIABLE |
9bce3c1c TB |
3738 | && a->expr->symtree->n.sym->as |
3739 | && a->expr->symtree->n.sym->as->type == AS_ASSUMED_SHAPE | |
7afb6108 | 3740 | && !(fas && fas->type == AS_ASSUMED_SHAPE)) |
9bce3c1c TB |
3741 | { |
3742 | if (where) | |
3743 | gfc_error ("Assumed-shape actual argument at %L is " | |
3744 | "incompatible with the non-assumed-shape " | |
c4100eae | 3745 | "dummy argument %qs due to VOLATILE attribute", |
9bce3c1c | 3746 | &a->expr->where,f->sym->name); |
ee11be7f SL |
3747 | ok = false; |
3748 | goto match; | |
9bce3c1c TB |
3749 | } |
3750 | ||
eb401400 AV |
3751 | /* Find the last array_ref. */ |
3752 | actual_arr_ref = NULL; | |
3753 | if (a->expr->ref) | |
3754 | actual_arr_ref = gfc_find_array_ref (a->expr, true); | |
3755 | ||
9bce3c1c | 3756 | if (f->sym->attr.volatile_ |
eb401400 | 3757 | && actual_arr_ref && actual_arr_ref->type == AR_SECTION |
7afb6108 | 3758 | && !(fas && fas->type == AS_ASSUMED_SHAPE)) |
9bce3c1c TB |
3759 | { |
3760 | if (where) | |
3761 | gfc_error ("Array-section actual argument at %L is " | |
3762 | "incompatible with the non-assumed-shape " | |
c4100eae | 3763 | "dummy argument %qs due to VOLATILE attribute", |
eb401400 | 3764 | &a->expr->where, f->sym->name); |
ee11be7f SL |
3765 | ok = false; |
3766 | goto match; | |
9bce3c1c TB |
3767 | } |
3768 | ||
3769 | /* C1233 (R1221) For an actual argument which is a pointer array, the | |
3770 | dummy argument shall be an assumed-shape or pointer array, if the | |
3771 | dummy argument has the VOLATILE attribute. */ | |
3772 | ||
3773 | if (f->sym->attr.volatile_ | |
271dd55c | 3774 | && a->expr->expr_type == EXPR_VARIABLE |
9bce3c1c TB |
3775 | && a->expr->symtree->n.sym->attr.pointer |
3776 | && a->expr->symtree->n.sym->as | |
7afb6108 SL |
3777 | && !(fas |
3778 | && (fas->type == AS_ASSUMED_SHAPE | |
9bce3c1c TB |
3779 | || f->sym->attr.pointer))) |
3780 | { | |
3781 | if (where) | |
3782 | gfc_error ("Pointer-array actual argument at %L requires " | |
3783 | "an assumed-shape or pointer-array dummy " | |
c4100eae | 3784 | "argument %qs due to VOLATILE attribute", |
9bce3c1c | 3785 | &a->expr->where,f->sym->name); |
ee11be7f SL |
3786 | ok = false; |
3787 | goto match; | |
9bce3c1c TB |
3788 | } |
3789 | ||
6de9cd9a DN |
3790 | match: |
3791 | if (a == actual) | |
3792 | na = i; | |
3793 | ||
7b901ac4 | 3794 | new_arg[i++] = a; |
6de9cd9a DN |
3795 | } |
3796 | ||
ee11be7f SL |
3797 | /* Give up now if we saw any bad argument. */ |
3798 | if (!ok) | |
3799 | return false; | |
3800 | ||
6de9cd9a DN |
3801 | /* Make sure missing actual arguments are optional. */ |
3802 | i = 0; | |
3803 | for (f = formal; f; f = f->next, i++) | |
3804 | { | |
7b901ac4 | 3805 | if (new_arg[i] != NULL) |
6de9cd9a | 3806 | continue; |
3ab7b3de BM |
3807 | if (f->sym == NULL) |
3808 | { | |
3809 | if (where) | |
b251af97 SK |
3810 | gfc_error ("Missing alternate return spec in subroutine call " |
3811 | "at %L", where); | |
f3e1097b | 3812 | return false; |
3ab7b3de | 3813 | } |
eb92cd57 TB |
3814 | /* For CLASS, the optional attribute might be set at either location. */ |
3815 | if (((f->sym->ts.type != BT_CLASS || !CLASS_DATA (f->sym)->attr.optional) | |
3816 | && !f->sym->attr.optional) | |
3817 | || (in_statement_function | |
3818 | && (f->sym->attr.optional | |
3819 | || (f->sym->ts.type == BT_CLASS | |
3820 | && CLASS_DATA (f->sym)->attr.optional)))) | |
6de9cd9a DN |
3821 | { |
3822 | if (where) | |
c4100eae | 3823 | gfc_error ("Missing actual argument for argument %qs at %L", |
6de9cd9a | 3824 | f->sym->name, where); |
f3e1097b | 3825 | return false; |
6de9cd9a DN |
3826 | } |
3827 | } | |
3828 | ||
a85e5696 SL |
3829 | /* We should have handled the cases where the formal arglist is null |
3830 | already. */ | |
3831 | gcc_assert (n > 0); | |
3832 | ||
6de9cd9a DN |
3833 | /* The argument lists are compatible. We now relink a new actual |
3834 | argument list with null arguments in the right places. The head | |
3835 | of the list remains the head. */ | |
5888512f | 3836 | for (f = formal, i = 0; f; f = f->next, i++) |
7b901ac4 | 3837 | if (new_arg[i] == NULL) |
5888512f MM |
3838 | { |
3839 | new_arg[i] = gfc_get_actual_arglist (); | |
3840 | new_arg[i]->associated_dummy = get_nonintrinsic_dummy_arg (f); | |
3841 | } | |
6de9cd9a DN |
3842 | |
3843 | if (na != 0) | |
3844 | { | |
fab27f52 MM |
3845 | std::swap (*new_arg[0], *actual); |
3846 | std::swap (new_arg[0], new_arg[na]); | |
6de9cd9a DN |
3847 | } |
3848 | ||
3849 | for (i = 0; i < n - 1; i++) | |
7b901ac4 | 3850 | new_arg[i]->next = new_arg[i + 1]; |
6de9cd9a | 3851 | |
7b901ac4 | 3852 | new_arg[i]->next = NULL; |
6de9cd9a DN |
3853 | |
3854 | if (*ap == NULL && n > 0) | |
7b901ac4 | 3855 | *ap = new_arg[0]; |
6de9cd9a | 3856 | |
f3e1097b | 3857 | return true; |
6de9cd9a DN |
3858 | } |
3859 | ||
3860 | ||
3861 | typedef struct | |
3862 | { | |
3863 | gfc_formal_arglist *f; | |
3864 | gfc_actual_arglist *a; | |
3865 | } | |
3866 | argpair; | |
3867 | ||
3868 | /* qsort comparison function for argument pairs, with the following | |
3869 | order: | |
3870 | - p->a->expr == NULL | |
3871 | - p->a->expr->expr_type != EXPR_VARIABLE | |
c5014982 | 3872 | - by gfc_symbol pointer value (larger first). */ |
6de9cd9a DN |
3873 | |
3874 | static int | |
3875 | pair_cmp (const void *p1, const void *p2) | |
3876 | { | |
3877 | const gfc_actual_arglist *a1, *a2; | |
3878 | ||
3879 | /* *p1 and *p2 are elements of the to-be-sorted array. */ | |
3880 | a1 = ((const argpair *) p1)->a; | |
3881 | a2 = ((const argpair *) p2)->a; | |
3882 | if (!a1->expr) | |
3883 | { | |
3884 | if (!a2->expr) | |
3885 | return 0; | |
3886 | return -1; | |
3887 | } | |
3888 | if (!a2->expr) | |
3889 | return 1; | |
3890 | if (a1->expr->expr_type != EXPR_VARIABLE) | |
3891 | { | |
3892 | if (a2->expr->expr_type != EXPR_VARIABLE) | |
3893 | return 0; | |
3894 | return -1; | |
3895 | } | |
3896 | if (a2->expr->expr_type != EXPR_VARIABLE) | |
3897 | return 1; | |
c5014982 AM |
3898 | if (a1->expr->symtree->n.sym > a2->expr->symtree->n.sym) |
3899 | return -1; | |
6de9cd9a DN |
3900 | return a1->expr->symtree->n.sym < a2->expr->symtree->n.sym; |
3901 | } | |
3902 | ||
3903 | ||
3904 | /* Given two expressions from some actual arguments, test whether they | |
3905 | refer to the same expression. The analysis is conservative. | |
524af0d6 | 3906 | Returning false will produce no warning. */ |
6de9cd9a | 3907 | |
524af0d6 | 3908 | static bool |
b251af97 | 3909 | compare_actual_expr (gfc_expr *e1, gfc_expr *e2) |
6de9cd9a DN |
3910 | { |
3911 | const gfc_ref *r1, *r2; | |
3912 | ||
3913 | if (!e1 || !e2 | |
3914 | || e1->expr_type != EXPR_VARIABLE | |
3915 | || e2->expr_type != EXPR_VARIABLE | |
3916 | || e1->symtree->n.sym != e2->symtree->n.sym) | |
524af0d6 | 3917 | return false; |
6de9cd9a | 3918 | |
e53b6e56 | 3919 | /* TODO: improve comparison, see expr.cc:show_ref(). */ |
6de9cd9a DN |
3920 | for (r1 = e1->ref, r2 = e2->ref; r1 && r2; r1 = r1->next, r2 = r2->next) |
3921 | { | |
3922 | if (r1->type != r2->type) | |
524af0d6 | 3923 | return false; |
6de9cd9a DN |
3924 | switch (r1->type) |
3925 | { | |
3926 | case REF_ARRAY: | |
3927 | if (r1->u.ar.type != r2->u.ar.type) | |
524af0d6 | 3928 | return false; |
6de9cd9a DN |
3929 | /* TODO: At the moment, consider only full arrays; |
3930 | we could do better. */ | |
3931 | if (r1->u.ar.type != AR_FULL || r2->u.ar.type != AR_FULL) | |
524af0d6 | 3932 | return false; |
6de9cd9a DN |
3933 | break; |
3934 | ||
3935 | case REF_COMPONENT: | |
3936 | if (r1->u.c.component != r2->u.c.component) | |
524af0d6 | 3937 | return false; |
6de9cd9a DN |
3938 | break; |
3939 | ||
3940 | case REF_SUBSTRING: | |
524af0d6 | 3941 | return false; |
6de9cd9a | 3942 | |
f16be16d SK |
3943 | case REF_INQUIRY: |
3944 | if (e1->symtree->n.sym->ts.type == BT_COMPLEX | |
3945 | && e1->ts.type == BT_REAL && e2->ts.type == BT_REAL | |
3946 | && r1->u.i != r2->u.i) | |
3947 | return false; | |
3948 | break; | |
3949 | ||
6de9cd9a DN |
3950 | default: |
3951 | gfc_internal_error ("compare_actual_expr(): Bad component code"); | |
3952 | } | |
3953 | } | |
3954 | if (!r1 && !r2) | |
524af0d6 JB |
3955 | return true; |
3956 | return false; | |
6de9cd9a DN |
3957 | } |
3958 | ||
b251af97 | 3959 | |
6de9cd9a DN |
3960 | /* Given formal and actual argument lists that correspond to one |
3961 | another, check that identical actual arguments aren't not | |
3962 | associated with some incompatible INTENTs. */ | |
3963 | ||
524af0d6 | 3964 | static bool |
b251af97 | 3965 | check_some_aliasing (gfc_formal_arglist *f, gfc_actual_arglist *a) |
6de9cd9a DN |
3966 | { |
3967 | sym_intent f1_intent, f2_intent; | |
3968 | gfc_formal_arglist *f1; | |
3969 | gfc_actual_arglist *a1; | |
3970 | size_t n, i, j; | |
3971 | argpair *p; | |
524af0d6 | 3972 | bool t = true; |
6de9cd9a DN |
3973 | |
3974 | n = 0; | |
3975 | for (f1 = f, a1 = a;; f1 = f1->next, a1 = a1->next) | |
3976 | { | |
3977 | if (f1 == NULL && a1 == NULL) | |
3978 | break; | |
3979 | if (f1 == NULL || a1 == NULL) | |
3980 | gfc_internal_error ("check_some_aliasing(): List mismatch"); | |
3981 | n++; | |
3982 | } | |
3983 | if (n == 0) | |
3984 | return t; | |
1145e690 | 3985 | p = XALLOCAVEC (argpair, n); |
6de9cd9a DN |
3986 | |
3987 | for (i = 0, f1 = f, a1 = a; i < n; i++, f1 = f1->next, a1 = a1->next) | |
3988 | { | |
3989 | p[i].f = f1; | |
3990 | p[i].a = a1; | |
3991 | } | |
3992 | ||
3993 | qsort (p, n, sizeof (argpair), pair_cmp); | |
3994 | ||
3995 | for (i = 0; i < n; i++) | |
3996 | { | |
3997 | if (!p[i].a->expr | |
3998 | || p[i].a->expr->expr_type != EXPR_VARIABLE | |
3999 | || p[i].a->expr->ts.type == BT_PROCEDURE) | |
4000 | continue; | |
4001 | f1_intent = p[i].f->sym->attr.intent; | |
4002 | for (j = i + 1; j < n; j++) | |
4003 | { | |
4004 | /* Expected order after the sort. */ | |
4005 | if (!p[j].a->expr || p[j].a->expr->expr_type != EXPR_VARIABLE) | |
4006 | gfc_internal_error ("check_some_aliasing(): corrupted data"); | |
4007 | ||
4008 | /* Are the expression the same? */ | |
524af0d6 | 4009 | if (!compare_actual_expr (p[i].a->expr, p[j].a->expr)) |
6de9cd9a DN |
4010 | break; |
4011 | f2_intent = p[j].f->sym->attr.intent; | |
4012 | if ((f1_intent == INTENT_IN && f2_intent == INTENT_OUT) | |
9f1930be TB |
4013 | || (f1_intent == INTENT_OUT && f2_intent == INTENT_IN) |
4014 | || (f1_intent == INTENT_OUT && f2_intent == INTENT_OUT)) | |
6de9cd9a | 4015 | { |
db30e21c | 4016 | gfc_warning (0, "Same actual argument associated with INTENT(%s) " |
48749dbc | 4017 | "argument %qs and INTENT(%s) argument %qs at %L", |
6de9cd9a DN |
4018 | gfc_intent_string (f1_intent), p[i].f->sym->name, |
4019 | gfc_intent_string (f2_intent), p[j].f->sym->name, | |
4020 | &p[i].a->expr->where); | |
524af0d6 | 4021 | t = false; |
6de9cd9a DN |
4022 | } |
4023 | } | |
4024 | } | |
4025 | ||
4026 | return t; | |
4027 | } | |
4028 | ||
4029 | ||
4030 | /* Given formal and actual argument lists that correspond to one | |
4031 | another, check that they are compatible in the sense that intents | |
4032 | are not mismatched. */ | |
4033 | ||
524af0d6 | 4034 | static bool |
b251af97 | 4035 | check_intents (gfc_formal_arglist *f, gfc_actual_arglist *a) |
6de9cd9a | 4036 | { |
f17facac | 4037 | sym_intent f_intent; |
6de9cd9a DN |
4038 | |
4039 | for (;; f = f->next, a = a->next) | |
4040 | { | |
99c39534 TB |
4041 | gfc_expr *expr; |
4042 | ||
6de9cd9a DN |
4043 | if (f == NULL && a == NULL) |
4044 | break; | |
4045 | if (f == NULL || a == NULL) | |
4046 | gfc_internal_error ("check_intents(): List mismatch"); | |
4047 | ||
99c39534 TB |
4048 | if (a->expr && a->expr->expr_type == EXPR_FUNCTION |
4049 | && a->expr->value.function.isym | |
4050 | && a->expr->value.function.isym->id == GFC_ISYM_CAF_GET) | |
4051 | expr = a->expr->value.function.actual->expr; | |
4052 | else | |
4053 | expr = a->expr; | |
4054 | ||
4055 | if (expr == NULL || expr->expr_type != EXPR_VARIABLE) | |
6de9cd9a DN |
4056 | continue; |
4057 | ||
6de9cd9a DN |
4058 | f_intent = f->sym->attr.intent; |
4059 | ||
99c39534 | 4060 | if (gfc_pure (NULL) && gfc_impure_variable (expr->symtree->n.sym)) |
6de9cd9a | 4061 | { |
bcb4ad36 TB |
4062 | if ((f->sym->ts.type == BT_CLASS && f->sym->attr.class_ok |
4063 | && CLASS_DATA (f->sym)->attr.class_pointer) | |
4064 | || (f->sym->ts.type != BT_CLASS && f->sym->attr.pointer)) | |
6de9cd9a | 4065 | { |
b251af97 SK |
4066 | gfc_error ("Procedure argument at %L is local to a PURE " |
4067 | "procedure and has the POINTER attribute", | |
99c39534 | 4068 | &expr->where); |
524af0d6 | 4069 | return false; |
6de9cd9a DN |
4070 | } |
4071 | } | |
d3a9eea2 TB |
4072 | |
4073 | /* Fortran 2008, C1283. */ | |
99c39534 | 4074 | if (gfc_pure (NULL) && gfc_is_coindexed (expr)) |
d3a9eea2 TB |
4075 | { |
4076 | if (f_intent == INTENT_INOUT || f_intent == INTENT_OUT) | |
4077 | { | |
4078 | gfc_error ("Coindexed actual argument at %L in PURE procedure " | |
4079 | "is passed to an INTENT(%s) argument", | |
99c39534 | 4080 | &expr->where, gfc_intent_string (f_intent)); |
524af0d6 | 4081 | return false; |
d3a9eea2 TB |
4082 | } |
4083 | ||
bcb4ad36 TB |
4084 | if ((f->sym->ts.type == BT_CLASS && f->sym->attr.class_ok |
4085 | && CLASS_DATA (f->sym)->attr.class_pointer) | |
4086 | || (f->sym->ts.type != BT_CLASS && f->sym->attr.pointer)) | |
d3a9eea2 TB |
4087 | { |
4088 | gfc_error ("Coindexed actual argument at %L in PURE procedure " | |
4089 | "is passed to a POINTER dummy argument", | |
99c39534 | 4090 | &expr->where); |
524af0d6 | 4091 | return false; |
d3a9eea2 TB |
4092 | } |
4093 | } | |
4094 | ||
4095 | /* F2008, Section 12.5.2.4. */ | |
99c39534 TB |
4096 | if (expr->ts.type == BT_CLASS && f->sym->ts.type == BT_CLASS |
4097 | && gfc_is_coindexed (expr)) | |
d3a9eea2 TB |
4098 | { |
4099 | gfc_error ("Coindexed polymorphic actual argument at %L is passed " | |
c4100eae | 4100 | "polymorphic dummy argument %qs", |
99c39534 | 4101 | &expr->where, f->sym->name); |
524af0d6 | 4102 | return false; |
d3a9eea2 | 4103 | } |
6de9cd9a DN |
4104 | } |
4105 | ||
524af0d6 | 4106 | return true; |
6de9cd9a DN |
4107 | } |
4108 | ||
4109 | ||
4110 | /* Check how a procedure is used against its interface. If all goes | |
4111 | well, the actual argument list will also end up being properly | |
4112 | sorted. */ | |
4113 | ||
524af0d6 | 4114 | bool |
b251af97 | 4115 | gfc_procedure_use (gfc_symbol *sym, gfc_actual_arglist **ap, locus *where) |
6de9cd9a | 4116 | { |
f3883269 | 4117 | gfc_actual_arglist *a; |
4cbc9039 | 4118 | gfc_formal_arglist *dummy_args; |
4a4fc7fe | 4119 | bool implicit = false; |
4cbc9039 | 4120 | |
a9c5fe7e | 4121 | /* Warn about calls with an implicit interface. Special case |
6bd2c800 | 4122 | for calling a ISO_C_BINDING because c_loc and c_funloc |
ca071303 FXC |
4123 | are pseudo-unknown. Additionally, warn about procedures not |
4124 | explicitly declared at all if requested. */ | |
8b7a967e | 4125 | if (sym->attr.if_source == IFSRC_UNKNOWN && !sym->attr.is_iso_c) |
ca071303 | 4126 | { |
b31f8023 | 4127 | bool has_implicit_none_export = false; |
4a4fc7fe | 4128 | implicit = true; |
b31f8023 TB |
4129 | if (sym->attr.proc == PROC_UNKNOWN) |
4130 | for (gfc_namespace *ns = sym->ns; ns; ns = ns->parent) | |
4131 | if (ns->has_implicit_none_export) | |
4132 | { | |
4133 | has_implicit_none_export = true; | |
4134 | break; | |
4135 | } | |
4136 | if (has_implicit_none_export) | |
8b7a967e | 4137 | { |
bcc478b9 BRF |
4138 | const char *guessed |
4139 | = gfc_lookup_function_fuzzy (sym->name, sym->ns->sym_root); | |
4140 | if (guessed) | |
4141 | gfc_error ("Procedure %qs called at %L is not explicitly declared" | |
4142 | "; did you mean %qs?", | |
4143 | sym->name, where, guessed); | |
4144 | else | |
4145 | gfc_error ("Procedure %qs called at %L is not explicitly declared", | |
4146 | sym->name, where); | |
8b7a967e TB |
4147 | return false; |
4148 | } | |
73e42eef | 4149 | if (warn_implicit_interface) |
48749dbc MLI |
4150 | gfc_warning (OPT_Wimplicit_interface, |
4151 | "Procedure %qs called with an implicit interface at %L", | |
ca071303 | 4152 | sym->name, where); |
73e42eef | 4153 | else if (warn_implicit_procedure && sym->attr.proc == PROC_UNKNOWN) |
48749dbc MLI |
4154 | gfc_warning (OPT_Wimplicit_procedure, |
4155 | "Procedure %qs called at %L is not explicitly declared", | |
ca071303 | 4156 | sym->name, where); |
ffeebc4f | 4157 | gfc_find_proc_namespace (sym->ns)->implicit_interface_calls = 1; |
ca071303 | 4158 | } |
6de9cd9a | 4159 | |
e6895430 | 4160 | if (sym->attr.if_source == IFSRC_UNKNOWN) |
ac05557c | 4161 | { |
86d7449c TB |
4162 | if (sym->attr.pointer) |
4163 | { | |
c4100eae MLI |
4164 | gfc_error ("The pointer object %qs at %L must have an explicit " |
4165 | "function interface or be declared as array", | |
4166 | sym->name, where); | |
524af0d6 | 4167 | return false; |
86d7449c TB |
4168 | } |
4169 | ||
4170 | if (sym->attr.allocatable && !sym->attr.external) | |
4171 | { | |
c4100eae MLI |
4172 | gfc_error ("The allocatable object %qs at %L must have an explicit " |
4173 | "function interface or be declared as array", | |
4174 | sym->name, where); | |
524af0d6 | 4175 | return false; |
86d7449c TB |
4176 | } |
4177 | ||
4178 | if (sym->attr.allocatable) | |
4179 | { | |
c4100eae MLI |
4180 | gfc_error ("Allocatable function %qs at %L must have an explicit " |
4181 | "function interface", sym->name, where); | |
524af0d6 | 4182 | return false; |
86d7449c TB |
4183 | } |
4184 | ||
ac05557c DF |
4185 | for (a = *ap; a; a = a->next) |
4186 | { | |
fb078366 TK |
4187 | if (a->expr && a->expr->error) |
4188 | return false; | |
4189 | ||
4a4fc7fe TK |
4190 | /* F2018, 15.4.2.2 Explicit interface is required for a |
4191 | polymorphic dummy argument, so there is no way to | |
4192 | legally have a class appear in an argument with an | |
4193 | implicit interface. */ | |
4194 | ||
4195 | if (implicit && a->expr && a->expr->ts.type == BT_CLASS) | |
4196 | { | |
4197 | gfc_error ("Explicit interface required for polymorphic " | |
4198 | "argument at %L",&a->expr->where); | |
4199 | a->expr->error = 1; | |
4200 | break; | |
4201 | } | |
4202 | ||
ac05557c DF |
4203 | /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */ |
4204 | if (a->name != NULL && a->name[0] != '%') | |
4205 | { | |
c4100eae MLI |
4206 | gfc_error ("Keyword argument requires explicit interface " |
4207 | "for procedure %qs at %L", sym->name, &a->expr->where); | |
ac05557c DF |
4208 | break; |
4209 | } | |
fea54935 | 4210 | |
45a69325 TB |
4211 | /* TS 29113, 6.2. */ |
4212 | if (a->expr && a->expr->ts.type == BT_ASSUMED | |
4213 | && sym->intmod_sym_id != ISOCBINDING_LOC) | |
4214 | { | |
4215 | gfc_error ("Assumed-type argument %s at %L requires an explicit " | |
4216 | "interface", a->expr->symtree->n.sym->name, | |
4217 | &a->expr->where); | |
fb078366 | 4218 | a->expr->error = 1; |
45a69325 TB |
4219 | break; |
4220 | } | |
4221 | ||
fea54935 TB |
4222 | /* F2008, C1303 and C1304. */ |
4223 | if (a->expr | |
4224 | && (a->expr->ts.type == BT_DERIVED || a->expr->ts.type == BT_CLASS) | |
f477062c | 4225 | && a->expr->ts.u.derived |
fea54935 TB |
4226 | && ((a->expr->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV |
4227 | && a->expr->ts.u.derived->intmod_sym_id == ISOFORTRAN_LOCK_TYPE) | |
4228 | || gfc_expr_attr (a->expr).lock_comp)) | |
4229 | { | |
c4100eae MLI |
4230 | gfc_error ("Actual argument of LOCK_TYPE or with LOCK_TYPE " |
4231 | "component at %L requires an explicit interface for " | |
4232 | "procedure %qs", &a->expr->where, sym->name); | |
fb078366 | 4233 | a->expr->error = 1; |
fea54935 TB |
4234 | break; |
4235 | } | |
ea8ad3e5 | 4236 | |
5df445a2 TB |
4237 | if (a->expr |
4238 | && (a->expr->ts.type == BT_DERIVED || a->expr->ts.type == BT_CLASS) | |
f477062c | 4239 | && a->expr->ts.u.derived |
5df445a2 TB |
4240 | && ((a->expr->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV |
4241 | && a->expr->ts.u.derived->intmod_sym_id | |
4242 | == ISOFORTRAN_EVENT_TYPE) | |
4243 | || gfc_expr_attr (a->expr).event_comp)) | |
4244 | { | |
4245 | gfc_error ("Actual argument of EVENT_TYPE or with EVENT_TYPE " | |
4246 | "component at %L requires an explicit interface for " | |
4247 | "procedure %qs", &a->expr->where, sym->name); | |
fb078366 | 4248 | a->expr->error = 1; |
5df445a2 TB |
4249 | break; |
4250 | } | |
4251 | ||
ea8ad3e5 TB |
4252 | if (a->expr && a->expr->expr_type == EXPR_NULL |
4253 | && a->expr->ts.type == BT_UNKNOWN) | |
4254 | { | |
fb078366 TK |
4255 | gfc_error ("MOLD argument to NULL required at %L", |
4256 | &a->expr->where); | |
4257 | a->expr->error = 1; | |
524af0d6 | 4258 | return false; |
ea8ad3e5 | 4259 | } |
c62c6622 | 4260 | |
820c25c8 HA |
4261 | if (a->expr && a->expr->expr_type == EXPR_NULL) |
4262 | { | |
4263 | gfc_error ("Passing intrinsic NULL as actual argument at %L " | |
4264 | "requires an explicit interface", &a->expr->where); | |
4265 | a->expr->error = 1; | |
4266 | return false; | |
4267 | } | |
4268 | ||
c62c6622 TB |
4269 | /* TS 29113, C407b. */ |
4270 | if (a->expr && a->expr->expr_type == EXPR_VARIABLE | |
4271 | && symbol_rank (a->expr->symtree->n.sym) == -1) | |
4272 | { | |
4273 | gfc_error ("Assumed-rank argument requires an explicit interface " | |
4274 | "at %L", &a->expr->where); | |
fb078366 | 4275 | a->expr->error = 1; |
524af0d6 | 4276 | return false; |
c62c6622 | 4277 | } |
ac05557c DF |
4278 | } |
4279 | ||
524af0d6 | 4280 | return true; |
ac05557c DF |
4281 | } |
4282 | ||
4cbc9039 JW |
4283 | dummy_args = gfc_sym_get_dummy_args (sym); |
4284 | ||
f3883269 SK |
4285 | /* For a statement function, check that types and type parameters of actual |
4286 | arguments and dummy arguments match. */ | |
e68a35ae TK |
4287 | if (!gfc_compare_actual_formal (ap, dummy_args, 0, sym->attr.elemental, |
4288 | sym->attr.proc == PROC_ST_FUNCTION, where)) | |
524af0d6 | 4289 | return false; |
a5baf71b | 4290 | |
524af0d6 JB |
4291 | if (!check_intents (dummy_args, *ap)) |
4292 | return false; | |
6de9cd9a | 4293 | |
73e42eef | 4294 | if (warn_aliasing) |
4cbc9039 | 4295 | check_some_aliasing (dummy_args, *ap); |
f8552cd4 | 4296 | |
524af0d6 | 4297 | return true; |
6de9cd9a DN |
4298 | } |
4299 | ||
4300 | ||
7e196f89 JW |
4301 | /* Check how a procedure pointer component is used against its interface. |
4302 | If all goes well, the actual argument list will also end up being properly | |
4303 | sorted. Completely analogous to gfc_procedure_use. */ | |
4304 | ||
4305 | void | |
4306 | gfc_ppc_use (gfc_component *comp, gfc_actual_arglist **ap, locus *where) | |
4307 | { | |
7e196f89 | 4308 | /* Warn about calls with an implicit interface. Special case |
6bd2c800 | 4309 | for calling a ISO_C_BINDING because c_loc and c_funloc |
7e196f89 | 4310 | are pseudo-unknown. */ |
73e42eef | 4311 | if (warn_implicit_interface |
7e196f89 JW |
4312 | && comp->attr.if_source == IFSRC_UNKNOWN |
4313 | && !comp->attr.is_iso_c) | |
48749dbc MLI |
4314 | gfc_warning (OPT_Wimplicit_interface, |
4315 | "Procedure pointer component %qs called with an implicit " | |
7e196f89 JW |
4316 | "interface at %L", comp->name, where); |
4317 | ||
4318 | if (comp->attr.if_source == IFSRC_UNKNOWN) | |
4319 | { | |
4320 | gfc_actual_arglist *a; | |
4321 | for (a = *ap; a; a = a->next) | |
4322 | { | |
4323 | /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */ | |
4324 | if (a->name != NULL && a->name[0] != '%') | |
4325 | { | |
c4100eae MLI |
4326 | gfc_error ("Keyword argument requires explicit interface " |
4327 | "for procedure pointer component %qs at %L", | |
4328 | comp->name, &a->expr->where); | |
7e196f89 JW |
4329 | break; |
4330 | } | |
4331 | } | |
4332 | ||
4333 | return; | |
4334 | } | |
4335 | ||
e68a35ae | 4336 | if (!gfc_compare_actual_formal (ap, comp->ts.interface->formal, 0, |
f3883269 | 4337 | comp->attr.elemental, false, where)) |
7e196f89 JW |
4338 | return; |
4339 | ||
4cbc9039 | 4340 | check_intents (comp->ts.interface->formal, *ap); |
73e42eef | 4341 | if (warn_aliasing) |
4cbc9039 | 4342 | check_some_aliasing (comp->ts.interface->formal, *ap); |
7e196f89 JW |
4343 | } |
4344 | ||
4345 | ||
f0ac18b7 DK |
4346 | /* Try if an actual argument list matches the formal list of a symbol, |
4347 | respecting the symbol's attributes like ELEMENTAL. This is used for | |
4348 | GENERIC resolution. */ | |
4349 | ||
4350 | bool | |
4351 | gfc_arglist_matches_symbol (gfc_actual_arglist** args, gfc_symbol* sym) | |
4352 | { | |
4cbc9039 | 4353 | gfc_formal_arglist *dummy_args; |
f0ac18b7 DK |
4354 | bool r; |
4355 | ||
1d101216 JD |
4356 | if (sym->attr.flavor != FL_PROCEDURE) |
4357 | return false; | |
f0ac18b7 | 4358 | |
4cbc9039 JW |
4359 | dummy_args = gfc_sym_get_dummy_args (sym); |
4360 | ||
f0ac18b7 | 4361 | r = !sym->attr.elemental; |
e68a35ae | 4362 | if (gfc_compare_actual_formal (args, dummy_args, r, !r, false, NULL)) |
f0ac18b7 | 4363 | { |
4cbc9039 | 4364 | check_intents (dummy_args, *args); |
73e42eef | 4365 | if (warn_aliasing) |
4cbc9039 | 4366 | check_some_aliasing (dummy_args, *args); |
f0ac18b7 DK |
4367 | return true; |
4368 | } | |
4369 | ||
4370 | return false; | |
4371 | } | |
4372 | ||
4373 | ||
6de9cd9a DN |
4374 | /* Given an interface pointer and an actual argument list, search for |
4375 | a formal argument list that matches the actual. If found, returns | |
4376 | a pointer to the symbol of the correct interface. Returns NULL if | |
4377 | not found. */ | |
4378 | ||
4379 | gfc_symbol * | |
b251af97 SK |
4380 | gfc_search_interface (gfc_interface *intr, int sub_flag, |
4381 | gfc_actual_arglist **ap) | |
6de9cd9a | 4382 | { |
22a0a780 | 4383 | gfc_symbol *elem_sym = NULL; |
ea8ad3e5 TB |
4384 | gfc_symbol *null_sym = NULL; |
4385 | locus null_expr_loc; | |
4386 | gfc_actual_arglist *a; | |
4387 | bool has_null_arg = false; | |
4388 | ||
4389 | for (a = *ap; a; a = a->next) | |
4390 | if (a->expr && a->expr->expr_type == EXPR_NULL | |
4391 | && a->expr->ts.type == BT_UNKNOWN) | |
4392 | { | |
4393 | has_null_arg = true; | |
4394 | null_expr_loc = a->expr->where; | |
4395 | break; | |
8b704316 | 4396 | } |
ea8ad3e5 | 4397 | |
6de9cd9a DN |
4398 | for (; intr; intr = intr->next) |
4399 | { | |
f6288c24 | 4400 | if (gfc_fl_struct (intr->sym->attr.flavor)) |
c3f34952 | 4401 | continue; |
6de9cd9a DN |
4402 | if (sub_flag && intr->sym->attr.function) |
4403 | continue; | |
4404 | if (!sub_flag && intr->sym->attr.subroutine) | |
4405 | continue; | |
4406 | ||
f0ac18b7 | 4407 | if (gfc_arglist_matches_symbol (ap, intr->sym)) |
22a0a780 | 4408 | { |
ea8ad3e5 TB |
4409 | if (has_null_arg && null_sym) |
4410 | { | |
4411 | gfc_error ("MOLD= required in NULL() argument at %L: Ambiguity " | |
4412 | "between specific functions %s and %s", | |
4413 | &null_expr_loc, null_sym->name, intr->sym->name); | |
4414 | return NULL; | |
4415 | } | |
4416 | else if (has_null_arg) | |
4417 | { | |
4418 | null_sym = intr->sym; | |
4419 | continue; | |
4420 | } | |
4421 | ||
22a0a780 | 4422 | /* Satisfy 12.4.4.1 such that an elemental match has lower |
8b704316 | 4423 | weight than a non-elemental match. */ |
22a0a780 PT |
4424 | if (intr->sym->attr.elemental) |
4425 | { | |
4426 | elem_sym = intr->sym; | |
4427 | continue; | |
4428 | } | |
4429 | return intr->sym; | |
4430 | } | |
6de9cd9a DN |
4431 | } |
4432 | ||
ea8ad3e5 TB |
4433 | if (null_sym) |
4434 | return null_sym; | |
4435 | ||
22a0a780 | 4436 | return elem_sym ? elem_sym : NULL; |
6de9cd9a DN |
4437 | } |
4438 | ||
4439 | ||
4440 | /* Do a brute force recursive search for a symbol. */ | |
4441 | ||
4442 | static gfc_symtree * | |
b251af97 | 4443 | find_symtree0 (gfc_symtree *root, gfc_symbol *sym) |
6de9cd9a DN |
4444 | { |
4445 | gfc_symtree * st; | |
4446 | ||
4447 | if (root->n.sym == sym) | |
4448 | return root; | |
4449 | ||
4450 | st = NULL; | |
4451 | if (root->left) | |
4452 | st = find_symtree0 (root->left, sym); | |
4453 | if (root->right && ! st) | |
4454 | st = find_symtree0 (root->right, sym); | |
4455 | return st; | |
4456 | } | |
4457 | ||
4458 | ||
4459 | /* Find a symtree for a symbol. */ | |
4460 | ||
f6fad28e DK |
4461 | gfc_symtree * |
4462 | gfc_find_sym_in_symtree (gfc_symbol *sym) | |
6de9cd9a DN |
4463 | { |
4464 | gfc_symtree *st; | |
4465 | gfc_namespace *ns; | |
4466 | ||
4467 | /* First try to find it by name. */ | |
4468 | gfc_find_sym_tree (sym->name, gfc_current_ns, 1, &st); | |
4469 | if (st && st->n.sym == sym) | |
4470 | return st; | |
4471 | ||
66e4ab31 | 4472 | /* If it's been renamed, resort to a brute-force search. */ |
6de9cd9a DN |
4473 | /* TODO: avoid having to do this search. If the symbol doesn't exist |
4474 | in the symtree for the current namespace, it should probably be added. */ | |
4475 | for (ns = gfc_current_ns; ns; ns = ns->parent) | |
4476 | { | |
4477 | st = find_symtree0 (ns->sym_root, sym); | |
4478 | if (st) | |
b251af97 | 4479 | return st; |
6de9cd9a | 4480 | } |
17d5d49f | 4481 | gfc_internal_error ("Unable to find symbol %qs", sym->name); |
66e4ab31 | 4482 | /* Not reached. */ |
6de9cd9a DN |
4483 | } |
4484 | ||
4485 | ||
4a44a72d DK |
4486 | /* See if the arglist to an operator-call contains a derived-type argument |
4487 | with a matching type-bound operator. If so, return the matching specific | |
4488 | procedure defined as operator-target as well as the base-object to use | |
974df0f8 PT |
4489 | (which is the found derived-type argument with operator). The generic |
4490 | name, if any, is transmitted to the final expression via 'gname'. */ | |
4a44a72d DK |
4491 | |
4492 | static gfc_typebound_proc* | |
4493 | matching_typebound_op (gfc_expr** tb_base, | |
4494 | gfc_actual_arglist* args, | |
974df0f8 PT |
4495 | gfc_intrinsic_op op, const char* uop, |
4496 | const char ** gname) | |
4a44a72d DK |
4497 | { |
4498 | gfc_actual_arglist* base; | |
4499 | ||
4500 | for (base = args; base; base = base->next) | |
4b7dd692 | 4501 | if (base->expr->ts.type == BT_DERIVED || base->expr->ts.type == BT_CLASS) |
4a44a72d DK |
4502 | { |
4503 | gfc_typebound_proc* tb; | |
4504 | gfc_symbol* derived; | |
524af0d6 | 4505 | bool result; |
4a44a72d | 4506 | |
efd2e969 PT |
4507 | while (base->expr->expr_type == EXPR_OP |
4508 | && base->expr->value.op.op == INTRINSIC_PARENTHESES) | |
4509 | base->expr = base->expr->value.op.op1; | |
4510 | ||
4b7dd692 | 4511 | if (base->expr->ts.type == BT_CLASS) |
528622fd | 4512 | { |
fba5a793 | 4513 | if (!base->expr->ts.u.derived || CLASS_DATA (base->expr) == NULL |
0a59e583 | 4514 | || !gfc_expr_attr (base->expr).class_ok) |
528622fd JW |
4515 | continue; |
4516 | derived = CLASS_DATA (base->expr)->ts.u.derived; | |
4517 | } | |
4b7dd692 JW |
4518 | else |
4519 | derived = base->expr->ts.u.derived; | |
4a44a72d DK |
4520 | |
4521 | if (op == INTRINSIC_USER) | |
4522 | { | |
4523 | gfc_symtree* tb_uop; | |
4524 | ||
4525 | gcc_assert (uop); | |
4526 | tb_uop = gfc_find_typebound_user_op (derived, &result, uop, | |
4527 | false, NULL); | |
4528 | ||
4529 | if (tb_uop) | |
4530 | tb = tb_uop->n.tb; | |
4531 | else | |
4532 | tb = NULL; | |
4533 | } | |
4534 | else | |
4535 | tb = gfc_find_typebound_intrinsic_op (derived, &result, op, | |
4536 | false, NULL); | |
4537 | ||
4538 | /* This means we hit a PRIVATE operator which is use-associated and | |
4539 | should thus not be seen. */ | |
524af0d6 | 4540 | if (!result) |
4a44a72d DK |
4541 | tb = NULL; |
4542 | ||
4543 | /* Look through the super-type hierarchy for a matching specific | |
4544 | binding. */ | |
4545 | for (; tb; tb = tb->overridden) | |
4546 | { | |
4547 | gfc_tbp_generic* g; | |
4548 | ||
4549 | gcc_assert (tb->is_generic); | |
4550 | for (g = tb->u.generic; g; g = g->next) | |
4551 | { | |
4552 | gfc_symbol* target; | |
4553 | gfc_actual_arglist* argcopy; | |
4554 | bool matches; | |
4555 | ||
4556 | gcc_assert (g->specific); | |
4557 | if (g->specific->error) | |
4558 | continue; | |
4559 | ||
4560 | target = g->specific->u.specific->n.sym; | |
4561 | ||
4562 | /* Check if this arglist matches the formal. */ | |
4563 | argcopy = gfc_copy_actual_arglist (args); | |
4564 | matches = gfc_arglist_matches_symbol (&argcopy, target); | |
4565 | gfc_free_actual_arglist (argcopy); | |
4566 | ||
4567 | /* Return if we found a match. */ | |
4568 | if (matches) | |
4569 | { | |
4570 | *tb_base = base->expr; | |
974df0f8 | 4571 | *gname = g->specific_st->name; |
4a44a72d DK |
4572 | return g->specific; |
4573 | } | |
4574 | } | |
4575 | } | |
4576 | } | |
4577 | ||
4578 | return NULL; | |
4579 | } | |
4580 | ||
4581 | ||
4582 | /* For the 'actual arglist' of an operator call and a specific typebound | |
4583 | procedure that has been found the target of a type-bound operator, build the | |
4584 | appropriate EXPR_COMPCALL and resolve it. We take this indirection over | |
4585 | type-bound procedures rather than resolving type-bound operators 'directly' | |
4586 | so that we can reuse the existing logic. */ | |
4587 | ||
4588 | static void | |
4589 | build_compcall_for_operator (gfc_expr* e, gfc_actual_arglist* actual, | |
974df0f8 PT |
4590 | gfc_expr* base, gfc_typebound_proc* target, |
4591 | const char *gname) | |
4a44a72d DK |
4592 | { |
4593 | e->expr_type = EXPR_COMPCALL; | |
4594 | e->value.compcall.tbp = target; | |
974df0f8 | 4595 | e->value.compcall.name = gname ? gname : "$op"; |
4a44a72d DK |
4596 | e->value.compcall.actual = actual; |
4597 | e->value.compcall.base_object = base; | |
4598 | e->value.compcall.ignore_pass = 1; | |
4599 | e->value.compcall.assign = 0; | |
94fae14b PT |
4600 | if (e->ts.type == BT_UNKNOWN |
4601 | && target->function) | |
4602 | { | |
4603 | if (target->is_generic) | |
4604 | e->ts = target->u.generic->specific->u.specific->n.sym->ts; | |
4605 | else | |
4606 | e->ts = target->u.specific->n.sym->ts; | |
4607 | } | |
4a44a72d DK |
4608 | } |
4609 | ||
4610 | ||
6de9cd9a DN |
4611 | /* This subroutine is called when an expression is being resolved. |
4612 | The expression node in question is either a user defined operator | |
1f2959f0 | 4613 | or an intrinsic operator with arguments that aren't compatible |
6de9cd9a DN |
4614 | with the operator. This subroutine builds an actual argument list |
4615 | corresponding to the operands, then searches for a compatible | |
4616 | interface. If one is found, the expression node is replaced with | |
eaee02a5 JW |
4617 | the appropriate function call. We use the 'match' enum to specify |
4618 | whether a replacement has been made or not, or if an error occurred. */ | |
6de9cd9a | 4619 | |
eaee02a5 JW |
4620 | match |
4621 | gfc_extend_expr (gfc_expr *e) | |
6de9cd9a DN |
4622 | { |
4623 | gfc_actual_arglist *actual; | |
4624 | gfc_symbol *sym; | |
4625 | gfc_namespace *ns; | |
4626 | gfc_user_op *uop; | |
4627 | gfc_intrinsic_op i; | |
974df0f8 | 4628 | const char *gname; |
517d78be JW |
4629 | gfc_typebound_proc* tbo; |
4630 | gfc_expr* tb_base; | |
6de9cd9a DN |
4631 | |
4632 | sym = NULL; | |
4633 | ||
4634 | actual = gfc_get_actual_arglist (); | |
58b03ab2 | 4635 | actual->expr = e->value.op.op1; |
6de9cd9a | 4636 | |
974df0f8 | 4637 | gname = NULL; |
4a44a72d | 4638 | |
58b03ab2 | 4639 | if (e->value.op.op2 != NULL) |
6de9cd9a DN |
4640 | { |
4641 | actual->next = gfc_get_actual_arglist (); | |
58b03ab2 | 4642 | actual->next->expr = e->value.op.op2; |
6de9cd9a DN |
4643 | } |
4644 | ||
e8d4f3fc | 4645 | i = fold_unary_intrinsic (e->value.op.op); |
6de9cd9a | 4646 | |
517d78be JW |
4647 | /* See if we find a matching type-bound operator. */ |
4648 | if (i == INTRINSIC_USER) | |
4649 | tbo = matching_typebound_op (&tb_base, actual, | |
4650 | i, e->value.op.uop->name, &gname); | |
4651 | else | |
4652 | switch (i) | |
4653 | { | |
4654 | #define CHECK_OS_COMPARISON(comp) \ | |
4655 | case INTRINSIC_##comp: \ | |
4656 | case INTRINSIC_##comp##_OS: \ | |
4657 | tbo = matching_typebound_op (&tb_base, actual, \ | |
4658 | INTRINSIC_##comp, NULL, &gname); \ | |
4659 | if (!tbo) \ | |
4660 | tbo = matching_typebound_op (&tb_base, actual, \ | |
4661 | INTRINSIC_##comp##_OS, NULL, &gname); \ | |
4662 | break; | |
4663 | CHECK_OS_COMPARISON(EQ) | |
4664 | CHECK_OS_COMPARISON(NE) | |
4665 | CHECK_OS_COMPARISON(GT) | |
4666 | CHECK_OS_COMPARISON(GE) | |
4667 | CHECK_OS_COMPARISON(LT) | |
4668 | CHECK_OS_COMPARISON(LE) | |
4669 | #undef CHECK_OS_COMPARISON | |
4670 | ||
4671 | default: | |
4672 | tbo = matching_typebound_op (&tb_base, actual, i, NULL, &gname); | |
4673 | break; | |
4674 | } | |
4675 | ||
4676 | /* If there is a matching typebound-operator, replace the expression with | |
4677 | a call to it and succeed. */ | |
4678 | if (tbo) | |
4679 | { | |
4680 | gcc_assert (tb_base); | |
4681 | build_compcall_for_operator (e, actual, tb_base, tbo, gname); | |
4682 | ||
4683 | if (!gfc_resolve_expr (e)) | |
4684 | return MATCH_ERROR; | |
4685 | else | |
4686 | return MATCH_YES; | |
4687 | } | |
e73d3ca6 | 4688 | |
6de9cd9a DN |
4689 | if (i == INTRINSIC_USER) |
4690 | { | |
4691 | for (ns = gfc_current_ns; ns; ns = ns->parent) | |
4692 | { | |
58b03ab2 | 4693 | uop = gfc_find_uop (e->value.op.uop->name, ns); |
6de9cd9a DN |
4694 | if (uop == NULL) |
4695 | continue; | |
4696 | ||
a1ee985f | 4697 | sym = gfc_search_interface (uop->op, 0, &actual); |
6de9cd9a DN |
4698 | if (sym != NULL) |
4699 | break; | |
4700 | } | |
4701 | } | |
4702 | else | |
4703 | { | |
4704 | for (ns = gfc_current_ns; ns; ns = ns->parent) | |
4705 | { | |
3bed9dd0 DF |
4706 | /* Due to the distinction between '==' and '.eq.' and friends, one has |
4707 | to check if either is defined. */ | |
4708 | switch (i) | |
4709 | { | |
4a44a72d DK |
4710 | #define CHECK_OS_COMPARISON(comp) \ |
4711 | case INTRINSIC_##comp: \ | |
4712 | case INTRINSIC_##comp##_OS: \ | |
4713 | sym = gfc_search_interface (ns->op[INTRINSIC_##comp], 0, &actual); \ | |
4714 | if (!sym) \ | |
4715 | sym = gfc_search_interface (ns->op[INTRINSIC_##comp##_OS], 0, &actual); \ | |
4716 | break; | |
4717 | CHECK_OS_COMPARISON(EQ) | |
4718 | CHECK_OS_COMPARISON(NE) | |
4719 | CHECK_OS_COMPARISON(GT) | |
4720 | CHECK_OS_COMPARISON(GE) | |
4721 | CHECK_OS_COMPARISON(LT) | |
4722 | CHECK_OS_COMPARISON(LE) | |
4723 | #undef CHECK_OS_COMPARISON | |
3bed9dd0 DF |
4724 | |
4725 | default: | |
a1ee985f | 4726 | sym = gfc_search_interface (ns->op[i], 0, &actual); |
3bed9dd0 DF |
4727 | } |
4728 | ||
6de9cd9a DN |
4729 | if (sym != NULL) |
4730 | break; | |
4731 | } | |
4732 | } | |
4733 | ||
4a44a72d DK |
4734 | /* TODO: Do an ambiguity-check and error if multiple matching interfaces are |
4735 | found rather than just taking the first one and not checking further. */ | |
4736 | ||
6de9cd9a DN |
4737 | if (sym == NULL) |
4738 | { | |
66e4ab31 | 4739 | /* Don't use gfc_free_actual_arglist(). */ |
04695783 | 4740 | free (actual->next); |
cede9502 | 4741 | free (actual); |
eaee02a5 | 4742 | return MATCH_NO; |
6de9cd9a DN |
4743 | } |
4744 | ||
4745 | /* Change the expression node to a function call. */ | |
4746 | e->expr_type = EXPR_FUNCTION; | |
f6fad28e | 4747 | e->symtree = gfc_find_sym_in_symtree (sym); |
6de9cd9a | 4748 | e->value.function.actual = actual; |
58b03ab2 TS |
4749 | e->value.function.esym = NULL; |
4750 | e->value.function.isym = NULL; | |
cf013e9f | 4751 | e->value.function.name = NULL; |
a1ab6660 | 4752 | e->user_operator = 1; |
6de9cd9a | 4753 | |
524af0d6 | 4754 | if (!gfc_resolve_expr (e)) |
eaee02a5 | 4755 | return MATCH_ERROR; |
6de9cd9a | 4756 | |
eaee02a5 | 4757 | return MATCH_YES; |
6de9cd9a DN |
4758 | } |
4759 | ||
4760 | ||
4f7395ff JW |
4761 | /* Tries to replace an assignment code node with a subroutine call to the |
4762 | subroutine associated with the assignment operator. Return true if the node | |
4763 | was replaced. On false, no error is generated. */ | |
6de9cd9a | 4764 | |
524af0d6 | 4765 | bool |
b251af97 | 4766 | gfc_extend_assign (gfc_code *c, gfc_namespace *ns) |
6de9cd9a DN |
4767 | { |
4768 | gfc_actual_arglist *actual; | |
4f7395ff JW |
4769 | gfc_expr *lhs, *rhs, *tb_base; |
4770 | gfc_symbol *sym = NULL; | |
4771 | const char *gname = NULL; | |
4772 | gfc_typebound_proc* tbo; | |
6de9cd9a | 4773 | |
a513927a | 4774 | lhs = c->expr1; |
6de9cd9a DN |
4775 | rhs = c->expr2; |
4776 | ||
8dc63166 SK |
4777 | /* Don't allow an intrinsic assignment with a BOZ rhs to be replaced. */ |
4778 | if (c->op == EXEC_ASSIGN | |
4779 | && c->expr1->expr_type == EXPR_VARIABLE | |
4780 | && c->expr2->expr_type == EXPR_CONSTANT && c->expr2->ts.type == BT_BOZ) | |
4781 | return false; | |
4782 | ||
6de9cd9a | 4783 | /* Don't allow an intrinsic assignment to be replaced. */ |
4b7dd692 | 4784 | if (lhs->ts.type != BT_DERIVED && lhs->ts.type != BT_CLASS |
e19bb186 | 4785 | && (rhs->rank == 0 || rhs->rank == lhs->rank) |
6de9cd9a | 4786 | && (lhs->ts.type == rhs->ts.type |
b251af97 | 4787 | || (gfc_numeric_ts (&lhs->ts) && gfc_numeric_ts (&rhs->ts)))) |
524af0d6 | 4788 | return false; |
6de9cd9a DN |
4789 | |
4790 | actual = gfc_get_actual_arglist (); | |
4791 | actual->expr = lhs; | |
4792 | ||
4793 | actual->next = gfc_get_actual_arglist (); | |
4794 | actual->next->expr = rhs; | |
4795 | ||
4f7395ff JW |
4796 | /* TODO: Ambiguity-check, see above for gfc_extend_expr. */ |
4797 | ||
4798 | /* See if we find a matching type-bound assignment. */ | |
4799 | tbo = matching_typebound_op (&tb_base, actual, INTRINSIC_ASSIGN, | |
4800 | NULL, &gname); | |
4801 | ||
4802 | if (tbo) | |
4803 | { | |
4804 | /* Success: Replace the expression with a type-bound call. */ | |
4805 | gcc_assert (tb_base); | |
4806 | c->expr1 = gfc_get_expr (); | |
4807 | build_compcall_for_operator (c->expr1, actual, tb_base, tbo, gname); | |
4808 | c->expr1->value.compcall.assign = 1; | |
4809 | c->expr1->where = c->loc; | |
4810 | c->expr2 = NULL; | |
4811 | c->op = EXEC_COMPCALL; | |
4812 | return true; | |
4813 | } | |
6de9cd9a | 4814 | |
4f7395ff | 4815 | /* See if we find an 'ordinary' (non-typebound) assignment procedure. */ |
6de9cd9a DN |
4816 | for (; ns; ns = ns->parent) |
4817 | { | |
a1ee985f | 4818 | sym = gfc_search_interface (ns->op[INTRINSIC_ASSIGN], 1, &actual); |
6de9cd9a DN |
4819 | if (sym != NULL) |
4820 | break; | |
4821 | } | |
4822 | ||
4f7395ff | 4823 | if (sym) |
6de9cd9a | 4824 | { |
4f7395ff JW |
4825 | /* Success: Replace the assignment with the call. */ |
4826 | c->op = EXEC_ASSIGN_CALL; | |
4827 | c->symtree = gfc_find_sym_in_symtree (sym); | |
4828 | c->expr1 = NULL; | |
4829 | c->expr2 = NULL; | |
4830 | c->ext.actual = actual; | |
4831 | return true; | |
6de9cd9a DN |
4832 | } |
4833 | ||
4f7395ff JW |
4834 | /* Failure: No assignment procedure found. */ |
4835 | free (actual->next); | |
4836 | free (actual); | |
4837 | return false; | |
6de9cd9a DN |
4838 | } |
4839 | ||
4840 | ||
4841 | /* Make sure that the interface just parsed is not already present in | |
4842 | the given interface list. Ambiguity isn't checked yet since module | |
4843 | procedures can be present without interfaces. */ | |
4844 | ||
524af0d6 | 4845 | bool |
362aa474 | 4846 | gfc_check_new_interface (gfc_interface *base, gfc_symbol *new_sym, locus loc) |
6de9cd9a DN |
4847 | { |
4848 | gfc_interface *ip; | |
4849 | ||
4850 | for (ip = base; ip; ip = ip->next) | |
4851 | { | |
7b901ac4 | 4852 | if (ip->sym == new_sym) |
6de9cd9a | 4853 | { |
c4100eae | 4854 | gfc_error ("Entity %qs at %L is already present in the interface", |
362aa474 | 4855 | new_sym->name, &loc); |
524af0d6 | 4856 | return false; |
6de9cd9a DN |
4857 | } |
4858 | } | |
4859 | ||
524af0d6 | 4860 | return true; |
6de9cd9a DN |
4861 | } |
4862 | ||
4863 | ||
4864 | /* Add a symbol to the current interface. */ | |
4865 | ||
524af0d6 | 4866 | bool |
7b901ac4 | 4867 | gfc_add_interface (gfc_symbol *new_sym) |
6de9cd9a DN |
4868 | { |
4869 | gfc_interface **head, *intr; | |
4870 | gfc_namespace *ns; | |
4871 | gfc_symbol *sym; | |
4872 | ||
4873 | switch (current_interface.type) | |
4874 | { | |
4875 | case INTERFACE_NAMELESS: | |
9e1d712c | 4876 | case INTERFACE_ABSTRACT: |
524af0d6 | 4877 | return true; |
6de9cd9a DN |
4878 | |
4879 | case INTERFACE_INTRINSIC_OP: | |
4880 | for (ns = current_interface.ns; ns; ns = ns->parent) | |
3bed9dd0 DF |
4881 | switch (current_interface.op) |
4882 | { | |
4883 | case INTRINSIC_EQ: | |
4884 | case INTRINSIC_EQ_OS: | |
e73d3ca6 | 4885 | if (!gfc_check_new_interface (ns->op[INTRINSIC_EQ], new_sym, |
524af0d6 | 4886 | gfc_current_locus) |
e73d3ca6 | 4887 | || !gfc_check_new_interface (ns->op[INTRINSIC_EQ_OS], |
524af0d6 JB |
4888 | new_sym, gfc_current_locus)) |
4889 | return false; | |
3bed9dd0 DF |
4890 | break; |
4891 | ||
4892 | case INTRINSIC_NE: | |
4893 | case INTRINSIC_NE_OS: | |
e73d3ca6 | 4894 | if (!gfc_check_new_interface (ns->op[INTRINSIC_NE], new_sym, |
524af0d6 | 4895 | gfc_current_locus) |
e73d3ca6 | 4896 | || !gfc_check_new_interface (ns->op[INTRINSIC_NE_OS], |
524af0d6 JB |
4897 | new_sym, gfc_current_locus)) |
4898 | return false; | |
3bed9dd0 DF |
4899 | break; |
4900 | ||
4901 | case INTRINSIC_GT: | |
4902 | case INTRINSIC_GT_OS: | |
e73d3ca6 | 4903 | if (!gfc_check_new_interface (ns->op[INTRINSIC_GT], |
524af0d6 | 4904 | new_sym, gfc_current_locus) |
e73d3ca6 | 4905 | || !gfc_check_new_interface (ns->op[INTRINSIC_GT_OS], |
524af0d6 JB |
4906 | new_sym, gfc_current_locus)) |
4907 | return false; | |
3bed9dd0 DF |
4908 | break; |
4909 | ||
4910 | case INTRINSIC_GE: | |
4911 | case INTRINSIC_GE_OS: | |
e73d3ca6 | 4912 | if (!gfc_check_new_interface (ns->op[INTRINSIC_GE], |
524af0d6 | 4913 | new_sym, gfc_current_locus) |
e73d3ca6 | 4914 | || !gfc_check_new_interface (ns->op[INTRINSIC_GE_OS], |
524af0d6 JB |
4915 | new_sym, gfc_current_locus)) |
4916 | return false; | |
3bed9dd0 DF |
4917 | break; |
4918 | ||
4919 | case INTRINSIC_LT: | |
4920 | case INTRINSIC_LT_OS: | |
e73d3ca6 | 4921 | if (!gfc_check_new_interface (ns->op[INTRINSIC_LT], |
524af0d6 | 4922 | new_sym, gfc_current_locus) |
e73d3ca6 | 4923 | || !gfc_check_new_interface (ns->op[INTRINSIC_LT_OS], |
524af0d6 JB |
4924 | new_sym, gfc_current_locus)) |
4925 | return false; | |
3bed9dd0 DF |
4926 | break; |
4927 | ||
4928 | case INTRINSIC_LE: | |
4929 | case INTRINSIC_LE_OS: | |
e73d3ca6 | 4930 | if (!gfc_check_new_interface (ns->op[INTRINSIC_LE], |
524af0d6 | 4931 | new_sym, gfc_current_locus) |
e73d3ca6 | 4932 | || !gfc_check_new_interface (ns->op[INTRINSIC_LE_OS], |
524af0d6 JB |
4933 | new_sym, gfc_current_locus)) |
4934 | return false; | |
3bed9dd0 DF |
4935 | break; |
4936 | ||
4937 | default: | |
e73d3ca6 | 4938 | if (!gfc_check_new_interface (ns->op[current_interface.op], |
524af0d6 JB |
4939 | new_sym, gfc_current_locus)) |
4940 | return false; | |
3bed9dd0 | 4941 | } |
6de9cd9a | 4942 | |
a1ee985f | 4943 | head = ¤t_interface.ns->op[current_interface.op]; |
6de9cd9a DN |
4944 | break; |
4945 | ||
4946 | case INTERFACE_GENERIC: | |
e73d3ca6 | 4947 | case INTERFACE_DTIO: |
6de9cd9a DN |
4948 | for (ns = current_interface.ns; ns; ns = ns->parent) |
4949 | { | |
4950 | gfc_find_symbol (current_interface.sym->name, ns, 0, &sym); | |
4951 | if (sym == NULL) | |
4952 | continue; | |
4953 | ||
e73d3ca6 | 4954 | if (!gfc_check_new_interface (sym->generic, |
524af0d6 JB |
4955 | new_sym, gfc_current_locus)) |
4956 | return false; | |
6de9cd9a DN |
4957 | } |
4958 | ||
4959 | head = ¤t_interface.sym->generic; | |
4960 | break; | |
4961 | ||
4962 | case INTERFACE_USER_OP: | |
e73d3ca6 | 4963 | if (!gfc_check_new_interface (current_interface.uop->op, |
524af0d6 JB |
4964 | new_sym, gfc_current_locus)) |
4965 | return false; | |
6de9cd9a | 4966 | |
a1ee985f | 4967 | head = ¤t_interface.uop->op; |
6de9cd9a DN |
4968 | break; |
4969 | ||
4970 | default: | |
4971 | gfc_internal_error ("gfc_add_interface(): Bad interface type"); | |
4972 | } | |
4973 | ||
4974 | intr = gfc_get_interface (); | |
7b901ac4 | 4975 | intr->sym = new_sym; |
63645982 | 4976 | intr->where = gfc_current_locus; |
6de9cd9a DN |
4977 | |
4978 | intr->next = *head; | |
4979 | *head = intr; | |
4980 | ||
524af0d6 | 4981 | return true; |
6de9cd9a DN |
4982 | } |
4983 | ||
4984 | ||
d5815045 | 4985 | gfc_interface *& |
2b77e908 FXC |
4986 | gfc_current_interface_head (void) |
4987 | { | |
4988 | switch (current_interface.type) | |
4989 | { | |
4990 | case INTERFACE_INTRINSIC_OP: | |
a1ee985f | 4991 | return current_interface.ns->op[current_interface.op]; |
2b77e908 FXC |
4992 | |
4993 | case INTERFACE_GENERIC: | |
e73d3ca6 | 4994 | case INTERFACE_DTIO: |
2b77e908 | 4995 | return current_interface.sym->generic; |
2b77e908 FXC |
4996 | |
4997 | case INTERFACE_USER_OP: | |
a1ee985f | 4998 | return current_interface.uop->op; |
2b77e908 FXC |
4999 | |
5000 | default: | |
5001 | gcc_unreachable (); | |
5002 | } | |
5003 | } | |
5004 | ||
5005 | ||
5006 | void | |
5007 | gfc_set_current_interface_head (gfc_interface *i) | |
5008 | { | |
5009 | switch (current_interface.type) | |
5010 | { | |
5011 | case INTERFACE_INTRINSIC_OP: | |
a1ee985f | 5012 | current_interface.ns->op[current_interface.op] = i; |
2b77e908 FXC |
5013 | break; |
5014 | ||
5015 | case INTERFACE_GENERIC: | |
e73d3ca6 | 5016 | case INTERFACE_DTIO: |
2b77e908 FXC |
5017 | current_interface.sym->generic = i; |
5018 | break; | |
5019 | ||
5020 | case INTERFACE_USER_OP: | |
a1ee985f | 5021 | current_interface.uop->op = i; |
2b77e908 FXC |
5022 | break; |
5023 | ||
5024 | default: | |
5025 | gcc_unreachable (); | |
5026 | } | |
5027 | } | |
5028 | ||
5029 | ||
6de9cd9a DN |
5030 | /* Gets rid of a formal argument list. We do not free symbols. |
5031 | Symbols are freed when a namespace is freed. */ | |
5032 | ||
5033 | void | |
b251af97 | 5034 | gfc_free_formal_arglist (gfc_formal_arglist *p) |
6de9cd9a DN |
5035 | { |
5036 | gfc_formal_arglist *q; | |
5037 | ||
5038 | for (; p; p = q) | |
5039 | { | |
5040 | q = p->next; | |
cede9502 | 5041 | free (p); |
6de9cd9a DN |
5042 | } |
5043 | } | |
99fc1b90 JW |
5044 | |
5045 | ||
9795c594 JW |
5046 | /* Check that it is ok for the type-bound procedure 'proc' to override the |
5047 | procedure 'old', cf. F08:4.5.7.3. */ | |
99fc1b90 | 5048 | |
524af0d6 | 5049 | bool |
99fc1b90 JW |
5050 | gfc_check_typebound_override (gfc_symtree* proc, gfc_symtree* old) |
5051 | { | |
5052 | locus where; | |
edc802c7 | 5053 | gfc_symbol *proc_target, *old_target; |
99fc1b90 | 5054 | unsigned proc_pass_arg, old_pass_arg, argpos; |
9795c594 JW |
5055 | gfc_formal_arglist *proc_formal, *old_formal; |
5056 | bool check_type; | |
5057 | char err[200]; | |
99fc1b90 JW |
5058 | |
5059 | /* This procedure should only be called for non-GENERIC proc. */ | |
5060 | gcc_assert (!proc->n.tb->is_generic); | |
5061 | ||
5062 | /* If the overwritten procedure is GENERIC, this is an error. */ | |
5063 | if (old->n.tb->is_generic) | |
5064 | { | |
1fe61adf | 5065 | gfc_error ("Cannot overwrite GENERIC %qs at %L", |
99fc1b90 | 5066 | old->name, &proc->n.tb->where); |
524af0d6 | 5067 | return false; |
99fc1b90 JW |
5068 | } |
5069 | ||
5070 | where = proc->n.tb->where; | |
5071 | proc_target = proc->n.tb->u.specific->n.sym; | |
5072 | old_target = old->n.tb->u.specific->n.sym; | |
5073 | ||
5074 | /* Check that overridden binding is not NON_OVERRIDABLE. */ | |
5075 | if (old->n.tb->non_overridable) | |
5076 | { | |
c4100eae | 5077 | gfc_error ("%qs at %L overrides a procedure binding declared" |
99fc1b90 | 5078 | " NON_OVERRIDABLE", proc->name, &where); |
524af0d6 | 5079 | return false; |
99fc1b90 JW |
5080 | } |
5081 | ||
5082 | /* It's an error to override a non-DEFERRED procedure with a DEFERRED one. */ | |
5083 | if (!old->n.tb->deferred && proc->n.tb->deferred) | |
5084 | { | |
c4100eae | 5085 | gfc_error ("%qs at %L must not be DEFERRED as it overrides a" |
99fc1b90 | 5086 | " non-DEFERRED binding", proc->name, &where); |
524af0d6 | 5087 | return false; |
99fc1b90 JW |
5088 | } |
5089 | ||
5090 | /* If the overridden binding is PURE, the overriding must be, too. */ | |
5091 | if (old_target->attr.pure && !proc_target->attr.pure) | |
5092 | { | |
c4100eae | 5093 | gfc_error ("%qs at %L overrides a PURE procedure and must also be PURE", |
99fc1b90 | 5094 | proc->name, &where); |
524af0d6 | 5095 | return false; |
99fc1b90 JW |
5096 | } |
5097 | ||
5098 | /* If the overridden binding is ELEMENTAL, the overriding must be, too. If it | |
5099 | is not, the overriding must not be either. */ | |
5100 | if (old_target->attr.elemental && !proc_target->attr.elemental) | |
5101 | { | |
c4100eae | 5102 | gfc_error ("%qs at %L overrides an ELEMENTAL procedure and must also be" |
99fc1b90 | 5103 | " ELEMENTAL", proc->name, &where); |
524af0d6 | 5104 | return false; |
99fc1b90 JW |
5105 | } |
5106 | if (!old_target->attr.elemental && proc_target->attr.elemental) | |
5107 | { | |
c4100eae | 5108 | gfc_error ("%qs at %L overrides a non-ELEMENTAL procedure and must not" |
99fc1b90 | 5109 | " be ELEMENTAL, either", proc->name, &where); |
524af0d6 | 5110 | return false; |
99fc1b90 JW |
5111 | } |
5112 | ||
5113 | /* If the overridden binding is a SUBROUTINE, the overriding must also be a | |
5114 | SUBROUTINE. */ | |
5115 | if (old_target->attr.subroutine && !proc_target->attr.subroutine) | |
5116 | { | |
c4100eae | 5117 | gfc_error ("%qs at %L overrides a SUBROUTINE and must also be a" |
99fc1b90 | 5118 | " SUBROUTINE", proc->name, &where); |
524af0d6 | 5119 | return false; |
99fc1b90 JW |
5120 | } |
5121 | ||
5122 | /* If the overridden binding is a FUNCTION, the overriding must also be a | |
5123 | FUNCTION and have the same characteristics. */ | |
5124 | if (old_target->attr.function) | |
5125 | { | |
5126 | if (!proc_target->attr.function) | |
5127 | { | |
c4100eae | 5128 | gfc_error ("%qs at %L overrides a FUNCTION and must also be a" |
99fc1b90 | 5129 | " FUNCTION", proc->name, &where); |
524af0d6 | 5130 | return false; |
99fc1b90 | 5131 | } |
8b704316 | 5132 | |
4668d6f9 PT |
5133 | if (!gfc_check_result_characteristics (proc_target, old_target, |
5134 | err, sizeof(err))) | |
2240d1cf | 5135 | { |
edc802c7 | 5136 | gfc_error ("Result mismatch for the overriding procedure " |
c4100eae | 5137 | "%qs at %L: %s", proc->name, &where, err); |
524af0d6 | 5138 | return false; |
2240d1cf | 5139 | } |
99fc1b90 JW |
5140 | } |
5141 | ||
5142 | /* If the overridden binding is PUBLIC, the overriding one must not be | |
5143 | PRIVATE. */ | |
5144 | if (old->n.tb->access == ACCESS_PUBLIC | |
5145 | && proc->n.tb->access == ACCESS_PRIVATE) | |
5146 | { | |
c4100eae | 5147 | gfc_error ("%qs at %L overrides a PUBLIC procedure and must not be" |
99fc1b90 | 5148 | " PRIVATE", proc->name, &where); |
524af0d6 | 5149 | return false; |
99fc1b90 JW |
5150 | } |
5151 | ||
5152 | /* Compare the formal argument lists of both procedures. This is also abused | |
5153 | to find the position of the passed-object dummy arguments of both | |
5154 | bindings as at least the overridden one might not yet be resolved and we | |
5155 | need those positions in the check below. */ | |
5156 | proc_pass_arg = old_pass_arg = 0; | |
5157 | if (!proc->n.tb->nopass && !proc->n.tb->pass_arg) | |
5158 | proc_pass_arg = 1; | |
5159 | if (!old->n.tb->nopass && !old->n.tb->pass_arg) | |
5160 | old_pass_arg = 1; | |
5161 | argpos = 1; | |
4cbc9039 JW |
5162 | proc_formal = gfc_sym_get_dummy_args (proc_target); |
5163 | old_formal = gfc_sym_get_dummy_args (old_target); | |
5164 | for ( ; proc_formal && old_formal; | |
99fc1b90 JW |
5165 | proc_formal = proc_formal->next, old_formal = old_formal->next) |
5166 | { | |
5167 | if (proc->n.tb->pass_arg | |
5168 | && !strcmp (proc->n.tb->pass_arg, proc_formal->sym->name)) | |
5169 | proc_pass_arg = argpos; | |
5170 | if (old->n.tb->pass_arg | |
5171 | && !strcmp (old->n.tb->pass_arg, old_formal->sym->name)) | |
5172 | old_pass_arg = argpos; | |
5173 | ||
5174 | /* Check that the names correspond. */ | |
5175 | if (strcmp (proc_formal->sym->name, old_formal->sym->name)) | |
5176 | { | |
c4100eae | 5177 | gfc_error ("Dummy argument %qs of %qs at %L should be named %qs as" |
99fc1b90 JW |
5178 | " to match the corresponding argument of the overridden" |
5179 | " procedure", proc_formal->sym->name, proc->name, &where, | |
5180 | old_formal->sym->name); | |
524af0d6 | 5181 | return false; |
99fc1b90 JW |
5182 | } |
5183 | ||
9795c594 | 5184 | check_type = proc_pass_arg != argpos && old_pass_arg != argpos; |
4668d6f9 | 5185 | if (!gfc_check_dummy_characteristics (proc_formal->sym, old_formal->sym, |
524af0d6 | 5186 | check_type, err, sizeof(err))) |
99fc1b90 | 5187 | { |
e0b9e5f9 | 5188 | gfc_error_opt (0, "Argument mismatch for the overriding procedure " |
2700d0e3 | 5189 | "%qs at %L: %s", proc->name, &where, err); |
524af0d6 | 5190 | return false; |
99fc1b90 JW |
5191 | } |
5192 | ||
5193 | ++argpos; | |
5194 | } | |
5195 | if (proc_formal || old_formal) | |
5196 | { | |
c4100eae | 5197 | gfc_error ("%qs at %L must have the same number of formal arguments as" |
99fc1b90 | 5198 | " the overridden procedure", proc->name, &where); |
524af0d6 | 5199 | return false; |
99fc1b90 JW |
5200 | } |
5201 | ||
5202 | /* If the overridden binding is NOPASS, the overriding one must also be | |
5203 | NOPASS. */ | |
5204 | if (old->n.tb->nopass && !proc->n.tb->nopass) | |
5205 | { | |
c4100eae | 5206 | gfc_error ("%qs at %L overrides a NOPASS binding and must also be" |
99fc1b90 | 5207 | " NOPASS", proc->name, &where); |
524af0d6 | 5208 | return false; |
99fc1b90 JW |
5209 | } |
5210 | ||
5211 | /* If the overridden binding is PASS(x), the overriding one must also be | |
5212 | PASS and the passed-object dummy arguments must correspond. */ | |
5213 | if (!old->n.tb->nopass) | |
5214 | { | |
5215 | if (proc->n.tb->nopass) | |
5216 | { | |
c4100eae | 5217 | gfc_error ("%qs at %L overrides a binding with PASS and must also be" |
99fc1b90 | 5218 | " PASS", proc->name, &where); |
524af0d6 | 5219 | return false; |
99fc1b90 JW |
5220 | } |
5221 | ||
5222 | if (proc_pass_arg != old_pass_arg) | |
5223 | { | |
c4100eae | 5224 | gfc_error ("Passed-object dummy argument of %qs at %L must be at" |
99fc1b90 JW |
5225 | " the same position as the passed-object dummy argument of" |
5226 | " the overridden procedure", proc->name, &where); | |
524af0d6 | 5227 | return false; |
99fc1b90 JW |
5228 | } |
5229 | } | |
5230 | ||
524af0d6 | 5231 | return true; |
99fc1b90 | 5232 | } |
e73d3ca6 PT |
5233 | |
5234 | ||
5235 | /* The following three functions check that the formal arguments | |
5236 | of user defined derived type IO procedures are compliant with | |
f3ad8745 | 5237 | the requirements of the standard, see F03:9.5.3.7.2 (F08:9.6.4.8.3). */ |
e73d3ca6 PT |
5238 | |
5239 | static void | |
5240 | check_dtio_arg_TKR_intent (gfc_symbol *fsym, bool typebound, bt type, | |
5241 | int kind, int rank, sym_intent intent) | |
5242 | { | |
5243 | if (fsym->ts.type != type) | |
739d9339 PT |
5244 | { |
5245 | gfc_error ("DTIO dummy argument at %L must be of type %s", | |
5246 | &fsym->declared_at, gfc_basic_typename (type)); | |
5247 | return; | |
5248 | } | |
e73d3ca6 PT |
5249 | |
5250 | if (fsym->ts.type != BT_CLASS && fsym->ts.type != BT_DERIVED | |
5251 | && fsym->ts.kind != kind) | |
5252 | gfc_error ("DTIO dummy argument at %L must be of KIND = %d", | |
5253 | &fsym->declared_at, kind); | |
5254 | ||
5255 | if (!typebound | |
5256 | && rank == 0 | |
5257 | && (((type == BT_CLASS) && CLASS_DATA (fsym)->attr.dimension) | |
5258 | || ((type != BT_CLASS) && fsym->attr.dimension))) | |
b93a9a15 | 5259 | gfc_error ("DTIO dummy argument at %L must be a scalar", |
e73d3ca6 PT |
5260 | &fsym->declared_at); |
5261 | else if (rank == 1 | |
5262 | && (fsym->as == NULL || fsym->as->type != AS_ASSUMED_SHAPE)) | |
5263 | gfc_error ("DTIO dummy argument at %L must be an " | |
5264 | "ASSUMED SHAPE ARRAY", &fsym->declared_at); | |
5265 | ||
f3ad8745 JW |
5266 | if (type == BT_CHARACTER && fsym->ts.u.cl->length != NULL) |
5267 | gfc_error ("DTIO character argument at %L must have assumed length", | |
5268 | &fsym->declared_at); | |
5269 | ||
e73d3ca6 | 5270 | if (fsym->attr.intent != intent) |
77be9417 | 5271 | gfc_error ("DTIO dummy argument at %L must have INTENT %s", |
e73d3ca6 PT |
5272 | &fsym->declared_at, gfc_code2string (intents, (int)intent)); |
5273 | return; | |
5274 | } | |
5275 | ||
5276 | ||
5277 | static void | |
5278 | check_dtio_interface1 (gfc_symbol *derived, gfc_symtree *tb_io_st, | |
5279 | bool typebound, bool formatted, int code) | |
5280 | { | |
5281 | gfc_symbol *dtio_sub, *generic_proc, *fsym; | |
5282 | gfc_typebound_proc *tb_io_proc, *specific_proc; | |
5283 | gfc_interface *intr; | |
5284 | gfc_formal_arglist *formal; | |
5285 | int arg_num; | |
5286 | ||
5287 | bool read = ((dtio_codes)code == DTIO_RF) | |
5288 | || ((dtio_codes)code == DTIO_RUF); | |
5289 | bt type; | |
5290 | sym_intent intent; | |
5291 | int kind; | |
5292 | ||
5293 | dtio_sub = NULL; | |
5294 | if (typebound) | |
5295 | { | |
5296 | /* Typebound DTIO binding. */ | |
5297 | tb_io_proc = tb_io_st->n.tb; | |
739d9339 PT |
5298 | if (tb_io_proc == NULL) |
5299 | return; | |
5300 | ||
e73d3ca6 | 5301 | gcc_assert (tb_io_proc->is_generic); |
e73d3ca6 PT |
5302 | |
5303 | specific_proc = tb_io_proc->u.generic->specific; | |
739d9339 PT |
5304 | if (specific_proc == NULL || specific_proc->is_generic) |
5305 | return; | |
e73d3ca6 PT |
5306 | |
5307 | dtio_sub = specific_proc->u.specific->n.sym; | |
5308 | } | |
5309 | else | |
5310 | { | |
5311 | generic_proc = tb_io_st->n.sym; | |
739d9339 PT |
5312 | if (generic_proc == NULL || generic_proc->generic == NULL) |
5313 | return; | |
e73d3ca6 PT |
5314 | |
5315 | for (intr = tb_io_st->n.sym->generic; intr; intr = intr->next) | |
5316 | { | |
a8de3002 | 5317 | if (intr->sym && intr->sym->formal && intr->sym->formal->sym |
e73d3ca6 PT |
5318 | && ((intr->sym->formal->sym->ts.type == BT_CLASS |
5319 | && CLASS_DATA (intr->sym->formal->sym)->ts.u.derived | |
5320 | == derived) | |
5321 | || (intr->sym->formal->sym->ts.type == BT_DERIVED | |
5322 | && intr->sym->formal->sym->ts.u.derived == derived))) | |
5323 | { | |
5324 | dtio_sub = intr->sym; | |
5325 | break; | |
5326 | } | |
a8de3002 PT |
5327 | else if (intr->sym && intr->sym->formal && !intr->sym->formal->sym) |
5328 | { | |
5329 | gfc_error ("Alternate return at %L is not permitted in a DTIO " | |
5330 | "procedure", &intr->sym->declared_at); | |
5331 | return; | |
5332 | } | |
e73d3ca6 PT |
5333 | } |
5334 | ||
5335 | if (dtio_sub == NULL) | |
5336 | return; | |
5337 | } | |
5338 | ||
5339 | gcc_assert (dtio_sub); | |
5340 | if (!dtio_sub->attr.subroutine) | |
2f029c08 | 5341 | gfc_error ("DTIO procedure %qs at %L must be a subroutine", |
e73d3ca6 PT |
5342 | dtio_sub->name, &dtio_sub->declared_at); |
5343 | ||
dbeaa7ab | 5344 | if (!dtio_sub->resolve_symbol_called) |
3ab216a4 TB |
5345 | gfc_resolve_formal_arglist (dtio_sub); |
5346 | ||
a8de3002 PT |
5347 | arg_num = 0; |
5348 | for (formal = dtio_sub->formal; formal; formal = formal->next) | |
5349 | arg_num++; | |
5350 | ||
5351 | if (arg_num < (formatted ? 6 : 4)) | |
5352 | { | |
2f029c08 | 5353 | gfc_error ("Too few dummy arguments in DTIO procedure %qs at %L", |
a8de3002 PT |
5354 | dtio_sub->name, &dtio_sub->declared_at); |
5355 | return; | |
5356 | } | |
5357 | ||
5358 | if (arg_num > (formatted ? 6 : 4)) | |
5359 | { | |
2f029c08 | 5360 | gfc_error ("Too many dummy arguments in DTIO procedure %qs at %L", |
a8de3002 PT |
5361 | dtio_sub->name, &dtio_sub->declared_at); |
5362 | return; | |
5363 | } | |
5364 | ||
e73d3ca6 PT |
5365 | /* Now go through the formal arglist. */ |
5366 | arg_num = 1; | |
5367 | for (formal = dtio_sub->formal; formal; formal = formal->next, arg_num++) | |
5368 | { | |
5369 | if (!formatted && arg_num == 3) | |
5370 | arg_num = 5; | |
5371 | fsym = formal->sym; | |
a8de3002 PT |
5372 | |
5373 | if (fsym == NULL) | |
5374 | { | |
5375 | gfc_error ("Alternate return at %L is not permitted in a DTIO " | |
5376 | "procedure", &dtio_sub->declared_at); | |
5377 | return; | |
5378 | } | |
5379 | ||
e73d3ca6 PT |
5380 | switch (arg_num) |
5381 | { | |
5382 | case(1): /* DTV */ | |
5383 | type = derived->attr.sequence || derived->attr.is_bind_c ? | |
5384 | BT_DERIVED : BT_CLASS; | |
5385 | kind = 0; | |
5386 | intent = read ? INTENT_INOUT : INTENT_IN; | |
5387 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
5388 | 0, intent); | |
5389 | break; | |
5390 | ||
5391 | case(2): /* UNIT */ | |
5392 | type = BT_INTEGER; | |
5393 | kind = gfc_default_integer_kind; | |
5394 | intent = INTENT_IN; | |
5395 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
5396 | 0, intent); | |
5397 | break; | |
5398 | case(3): /* IOTYPE */ | |
5399 | type = BT_CHARACTER; | |
5400 | kind = gfc_default_character_kind; | |
5401 | intent = INTENT_IN; | |
5402 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
5403 | 0, intent); | |
5404 | break; | |
5405 | case(4): /* VLIST */ | |
5406 | type = BT_INTEGER; | |
5407 | kind = gfc_default_integer_kind; | |
5408 | intent = INTENT_IN; | |
5409 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
5410 | 1, intent); | |
5411 | break; | |
5412 | case(5): /* IOSTAT */ | |
5413 | type = BT_INTEGER; | |
5414 | kind = gfc_default_integer_kind; | |
5415 | intent = INTENT_OUT; | |
5416 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
5417 | 0, intent); | |
5418 | break; | |
5419 | case(6): /* IOMSG */ | |
5420 | type = BT_CHARACTER; | |
5421 | kind = gfc_default_character_kind; | |
5422 | intent = INTENT_INOUT; | |
5423 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
5424 | 0, intent); | |
5425 | break; | |
5426 | default: | |
5427 | gcc_unreachable (); | |
5428 | } | |
5429 | } | |
5430 | derived->attr.has_dtio_procs = 1; | |
5431 | return; | |
5432 | } | |
5433 | ||
5434 | void | |
5435 | gfc_check_dtio_interfaces (gfc_symbol *derived) | |
5436 | { | |
5437 | gfc_symtree *tb_io_st; | |
5438 | bool t = false; | |
5439 | int code; | |
5440 | bool formatted; | |
5441 | ||
5442 | if (derived->attr.is_class == 1 || derived->attr.vtype == 1) | |
5443 | return; | |
5444 | ||
5445 | /* Check typebound DTIO bindings. */ | |
5446 | for (code = 0; code < 4; code++) | |
5447 | { | |
5448 | formatted = ((dtio_codes)code == DTIO_RF) | |
5449 | || ((dtio_codes)code == DTIO_WF); | |
5450 | ||
5451 | tb_io_st = gfc_find_typebound_proc (derived, &t, | |
5452 | gfc_code2string (dtio_procs, code), | |
5453 | true, &derived->declared_at); | |
5454 | if (tb_io_st != NULL) | |
5455 | check_dtio_interface1 (derived, tb_io_st, true, formatted, code); | |
5456 | } | |
5457 | ||
5458 | /* Check generic DTIO interfaces. */ | |
5459 | for (code = 0; code < 4; code++) | |
5460 | { | |
5461 | formatted = ((dtio_codes)code == DTIO_RF) | |
5462 | || ((dtio_codes)code == DTIO_WF); | |
5463 | ||
5464 | tb_io_st = gfc_find_symtree (derived->ns->sym_root, | |
5465 | gfc_code2string (dtio_procs, code)); | |
5466 | if (tb_io_st != NULL) | |
5467 | check_dtio_interface1 (derived, tb_io_st, false, formatted, code); | |
5468 | } | |
5469 | } | |
5470 | ||
5471 | ||
e4e659b9 JW |
5472 | gfc_symtree* |
5473 | gfc_find_typebound_dtio_proc (gfc_symbol *derived, bool write, bool formatted) | |
e73d3ca6 PT |
5474 | { |
5475 | gfc_symtree *tb_io_st = NULL; | |
e73d3ca6 PT |
5476 | bool t = false; |
5477 | ||
dbeaa7ab ME |
5478 | if (!derived || !derived->resolve_symbol_called |
5479 | || derived->attr.flavor != FL_DERIVED) | |
9beb81ed PT |
5480 | return NULL; |
5481 | ||
e73d3ca6 PT |
5482 | /* Try to find a typebound DTIO binding. */ |
5483 | if (formatted == true) | |
5484 | { | |
5485 | if (write == true) | |
5486 | tb_io_st = gfc_find_typebound_proc (derived, &t, | |
5487 | gfc_code2string (dtio_procs, | |
5488 | DTIO_WF), | |
5489 | true, | |
5490 | &derived->declared_at); | |
5491 | else | |
5492 | tb_io_st = gfc_find_typebound_proc (derived, &t, | |
5493 | gfc_code2string (dtio_procs, | |
5494 | DTIO_RF), | |
5495 | true, | |
5496 | &derived->declared_at); | |
5497 | } | |
5498 | else | |
5499 | { | |
5500 | if (write == true) | |
5501 | tb_io_st = gfc_find_typebound_proc (derived, &t, | |
5502 | gfc_code2string (dtio_procs, | |
5503 | DTIO_WUF), | |
5504 | true, | |
5505 | &derived->declared_at); | |
5506 | else | |
5507 | tb_io_st = gfc_find_typebound_proc (derived, &t, | |
5508 | gfc_code2string (dtio_procs, | |
5509 | DTIO_RUF), | |
5510 | true, | |
5511 | &derived->declared_at); | |
5512 | } | |
e4e659b9 JW |
5513 | return tb_io_st; |
5514 | } | |
5515 | ||
5516 | ||
5517 | gfc_symbol * | |
5518 | gfc_find_specific_dtio_proc (gfc_symbol *derived, bool write, bool formatted) | |
5519 | { | |
5520 | gfc_symtree *tb_io_st = NULL; | |
5521 | gfc_symbol *dtio_sub = NULL; | |
5522 | gfc_symbol *extended; | |
5523 | gfc_typebound_proc *tb_io_proc, *specific_proc; | |
5524 | ||
5525 | tb_io_st = gfc_find_typebound_dtio_proc (derived, write, formatted); | |
e73d3ca6 PT |
5526 | |
5527 | if (tb_io_st != NULL) | |
5528 | { | |
096506bb PT |
5529 | const char *genname; |
5530 | gfc_symtree *st; | |
5531 | ||
e73d3ca6 PT |
5532 | tb_io_proc = tb_io_st->n.tb; |
5533 | gcc_assert (tb_io_proc != NULL); | |
5534 | gcc_assert (tb_io_proc->is_generic); | |
5535 | gcc_assert (tb_io_proc->u.generic->next == NULL); | |
5536 | ||
5537 | specific_proc = tb_io_proc->u.generic->specific; | |
5538 | gcc_assert (!specific_proc->is_generic); | |
5539 | ||
096506bb PT |
5540 | /* Go back and make sure that we have the right specific procedure. |
5541 | Here we most likely have a procedure from the parent type, which | |
5542 | can be overridden in extensions. */ | |
5543 | genname = tb_io_proc->u.generic->specific_st->name; | |
5544 | st = gfc_find_typebound_proc (derived, NULL, genname, | |
5545 | true, &tb_io_proc->where); | |
5546 | if (st) | |
5547 | dtio_sub = st->n.tb->u.specific->n.sym; | |
5548 | else | |
5549 | dtio_sub = specific_proc->u.specific->n.sym; | |
e73d3ca6 | 5550 | |
e4e659b9 JW |
5551 | goto finish; |
5552 | } | |
e73d3ca6 PT |
5553 | |
5554 | /* If there is not a typebound binding, look for a generic | |
5555 | DTIO interface. */ | |
5556 | for (extended = derived; extended; | |
5557 | extended = gfc_get_derived_super_type (extended)) | |
5558 | { | |
e4e659b9 JW |
5559 | if (extended == NULL || extended->ns == NULL |
5560 | || extended->attr.flavor == FL_UNKNOWN) | |
a8de3002 PT |
5561 | return NULL; |
5562 | ||
e73d3ca6 PT |
5563 | if (formatted == true) |
5564 | { | |
5565 | if (write == true) | |
5566 | tb_io_st = gfc_find_symtree (extended->ns->sym_root, | |
5567 | gfc_code2string (dtio_procs, | |
5568 | DTIO_WF)); | |
5569 | else | |
5570 | tb_io_st = gfc_find_symtree (extended->ns->sym_root, | |
5571 | gfc_code2string (dtio_procs, | |
5572 | DTIO_RF)); | |
5573 | } | |
5574 | else | |
5575 | { | |
5576 | if (write == true) | |
5577 | tb_io_st = gfc_find_symtree (extended->ns->sym_root, | |
5578 | gfc_code2string (dtio_procs, | |
5579 | DTIO_WUF)); | |
5580 | else | |
5581 | tb_io_st = gfc_find_symtree (extended->ns->sym_root, | |
5582 | gfc_code2string (dtio_procs, | |
5583 | DTIO_RUF)); | |
5584 | } | |
5585 | ||
5586 | if (tb_io_st != NULL | |
5587 | && tb_io_st->n.sym | |
5588 | && tb_io_st->n.sym->generic) | |
5589 | { | |
40109581 | 5590 | for (gfc_interface *intr = tb_io_st->n.sym->generic; |
413e859c | 5591 | intr && intr->sym; intr = intr->next) |
e73d3ca6 | 5592 | { |
413e859c | 5593 | if (intr->sym->formal) |
e73d3ca6 | 5594 | { |
413e859c JW |
5595 | gfc_symbol *fsym = intr->sym->formal->sym; |
5596 | if ((fsym->ts.type == BT_CLASS | |
5597 | && CLASS_DATA (fsym)->ts.u.derived == extended) | |
5598 | || (fsym->ts.type == BT_DERIVED | |
5599 | && fsym->ts.u.derived == extended)) | |
5600 | { | |
5601 | dtio_sub = intr->sym; | |
5602 | break; | |
5603 | } | |
e73d3ca6 PT |
5604 | } |
5605 | } | |
5606 | } | |
5607 | } | |
5608 | ||
5609 | finish: | |
72d91d6c TB |
5610 | if (dtio_sub |
5611 | && dtio_sub->formal->sym->ts.type == BT_CLASS | |
5612 | && derived != CLASS_DATA (dtio_sub->formal->sym)->ts.u.derived) | |
e73d3ca6 PT |
5613 | gfc_find_derived_vtab (derived); |
5614 | ||
5615 | return dtio_sub; | |
5616 | } | |
e68a35ae TK |
5617 | |
5618 | /* Helper function - if we do not find an interface for a procedure, | |
5619 | construct it from the actual arglist. Luckily, this can only | |
5620 | happen for call by reference, so the information we actually need | |
5621 | to provide (and which would be impossible to guess from the call | |
5622 | itself) is not actually needed. */ | |
5623 | ||
5624 | void | |
5625 | gfc_get_formal_from_actual_arglist (gfc_symbol *sym, | |
5626 | gfc_actual_arglist *actual_args) | |
5627 | { | |
5628 | gfc_actual_arglist *a; | |
5629 | gfc_formal_arglist **f; | |
5630 | gfc_symbol *s; | |
5631 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5632 | static int var_num; | |
5633 | ||
5634 | f = &sym->formal; | |
5635 | for (a = actual_args; a != NULL; a = a->next) | |
5636 | { | |
5637 | (*f) = gfc_get_formal_arglist (); | |
5638 | if (a->expr) | |
5639 | { | |
5640 | snprintf (name, GFC_MAX_SYMBOL_LEN, "_formal_%d", var_num ++); | |
5641 | gfc_get_symbol (name, gfc_current_ns, &s); | |
5642 | if (a->expr->ts.type == BT_PROCEDURE) | |
5643 | { | |
5644 | s->attr.flavor = FL_PROCEDURE; | |
5645 | } | |
5646 | else | |
5647 | { | |
5648 | s->ts = a->expr->ts; | |
5649 | ||
5650 | if (s->ts.type == BT_CHARACTER) | |
5651 | s->ts.u.cl = gfc_get_charlen (); | |
5652 | ||
5653 | s->ts.deferred = 0; | |
5654 | s->ts.is_iso_c = 0; | |
5655 | s->ts.is_c_interop = 0; | |
5656 | s->attr.flavor = FL_VARIABLE; | |
e68a35ae TK |
5657 | if (a->expr->rank > 0) |
5658 | { | |
5659 | s->attr.dimension = 1; | |
5660 | s->as = gfc_get_array_spec (); | |
5661 | s->as->rank = 1; | |
5662 | s->as->lower[0] = gfc_get_int_expr (gfc_index_integer_kind, | |
5663 | &a->expr->where, 1); | |
5664 | s->as->upper[0] = NULL; | |
5665 | s->as->type = AS_ASSUMED_SIZE; | |
5666 | } | |
4a4fc7fe TK |
5667 | else |
5668 | s->maybe_array = maybe_dummy_array_arg (a->expr); | |
e68a35ae TK |
5669 | } |
5670 | s->attr.dummy = 1; | |
3b0e49a5 | 5671 | s->attr.artificial = 1; |
e0b9e5f9 | 5672 | s->declared_at = a->expr->where; |
e68a35ae TK |
5673 | s->attr.intent = INTENT_UNKNOWN; |
5674 | (*f)->sym = s; | |
5675 | } | |
5676 | else /* If a->expr is NULL, this is an alternate rerturn. */ | |
5677 | (*f)->sym = NULL; | |
5678 | ||
5679 | f = &((*f)->next); | |
5680 | } | |
5681 | } | |
5d9d16db MM |
5682 | |
5683 | ||
48a8c5be MM |
5684 | const char * |
5685 | gfc_dummy_arg_get_name (gfc_dummy_arg & dummy_arg) | |
5686 | { | |
5687 | switch (dummy_arg.intrinsicness) | |
5688 | { | |
5689 | case GFC_INTRINSIC_DUMMY_ARG: | |
5690 | return dummy_arg.u.intrinsic->name; | |
5691 | ||
5692 | case GFC_NON_INTRINSIC_DUMMY_ARG: | |
5693 | return dummy_arg.u.non_intrinsic->sym->name; | |
5694 | ||
5695 | default: | |
5696 | gcc_unreachable (); | |
5697 | } | |
5698 | } | |
5699 | ||
5700 | ||
5d9d16db MM |
5701 | const gfc_typespec & |
5702 | gfc_dummy_arg_get_typespec (gfc_dummy_arg & dummy_arg) | |
5703 | { | |
5704 | switch (dummy_arg.intrinsicness) | |
5705 | { | |
5706 | case GFC_INTRINSIC_DUMMY_ARG: | |
5707 | return dummy_arg.u.intrinsic->ts; | |
5708 | ||
5709 | case GFC_NON_INTRINSIC_DUMMY_ARG: | |
5710 | return dummy_arg.u.non_intrinsic->sym->ts; | |
5711 | ||
5712 | default: | |
5713 | gcc_unreachable (); | |
5714 | } | |
5715 | } | |
5716 | ||
5717 | ||
5718 | bool | |
5719 | gfc_dummy_arg_is_optional (gfc_dummy_arg & dummy_arg) | |
5720 | { | |
5721 | switch (dummy_arg.intrinsicness) | |
5722 | { | |
5723 | case GFC_INTRINSIC_DUMMY_ARG: | |
5724 | return dummy_arg.u.intrinsic->optional; | |
5725 | ||
5726 | case GFC_NON_INTRINSIC_DUMMY_ARG: | |
5727 | return dummy_arg.u.non_intrinsic->sym->attr.optional; | |
5728 | ||
5729 | default: | |
5730 | gcc_unreachable (); | |
5731 | } | |
5732 | } |