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6de9cd9a | 1 | /* Deal with interfaces. |
8d9254fc | 2 | Copyright (C) 2000-2020 Free Software Foundation, Inc. |
6de9cd9a DN |
3 | Contributed by Andy Vaught |
4 | ||
9fc4d79b | 5 | This file is part of GCC. |
6de9cd9a | 6 | |
9fc4d79b TS |
7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free | |
d234d788 | 9 | Software Foundation; either version 3, or (at your option) any later |
9fc4d79b | 10 | version. |
6de9cd9a | 11 | |
9fc4d79b TS |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
6de9cd9a DN |
16 | |
17 | You should have received a copy of the GNU General Public License | |
d234d788 NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a DN |
20 | |
21 | ||
22 | /* Deal with interfaces. An explicit interface is represented as a | |
23 | singly linked list of formal argument structures attached to the | |
24 | relevant symbols. For an implicit interface, the arguments don't | |
25 | point to symbols. Explicit interfaces point to namespaces that | |
26 | contain the symbols within that interface. | |
27 | ||
28 | Implicit interfaces are linked together in a singly linked list | |
29 | along the next_if member of symbol nodes. Since a particular | |
30 | symbol can only have a single explicit interface, the symbol cannot | |
31 | be part of multiple lists and a single next-member suffices. | |
32 | ||
33 | This is not the case for general classes, though. An operator | |
34 | definition is independent of just about all other uses and has it's | |
35 | own head pointer. | |
36 | ||
37 | Nameless interfaces: | |
38 | Nameless interfaces create symbols with explicit interfaces within | |
39 | the current namespace. They are otherwise unlinked. | |
40 | ||
41 | Generic interfaces: | |
42 | The generic name points to a linked list of symbols. Each symbol | |
6892757c | 43 | has an explicit interface. Each explicit interface has its own |
6de9cd9a DN |
44 | namespace containing the arguments. Module procedures are symbols in |
45 | which the interface is added later when the module procedure is parsed. | |
46 | ||
47 | User operators: | |
48 | User-defined operators are stored in a their own set of symtrees | |
49 | separate from regular symbols. The symtrees point to gfc_user_op | |
50 | structures which in turn head up a list of relevant interfaces. | |
51 | ||
52 | Extended intrinsics and assignment: | |
53 | The head of these interface lists are stored in the containing namespace. | |
54 | ||
55 | Implicit interfaces: | |
56 | An implicit interface is represented as a singly linked list of | |
57 | formal argument list structures that don't point to any symbol | |
58 | nodes -- they just contain types. | |
59 | ||
60 | ||
61 | When a subprogram is defined, the program unit's name points to an | |
62 | interface as usual, but the link to the namespace is NULL and the | |
63 | formal argument list points to symbols within the same namespace as | |
64 | the program unit name. */ | |
65 | ||
66 | #include "config.h" | |
d22e4895 | 67 | #include "system.h" |
953bee7c | 68 | #include "coretypes.h" |
1916bcb5 | 69 | #include "options.h" |
6de9cd9a DN |
70 | #include "gfortran.h" |
71 | #include "match.h" | |
97f26732 | 72 | #include "arith.h" |
6de9cd9a | 73 | |
6de9cd9a DN |
74 | /* The current_interface structure holds information about the |
75 | interface currently being parsed. This structure is saved and | |
76 | restored during recursive interfaces. */ | |
77 | ||
78 | gfc_interface_info current_interface; | |
79 | ||
80 | ||
81 | /* Free a singly linked list of gfc_interface structures. */ | |
82 | ||
83 | void | |
b251af97 | 84 | gfc_free_interface (gfc_interface *intr) |
6de9cd9a DN |
85 | { |
86 | gfc_interface *next; | |
87 | ||
88 | for (; intr; intr = next) | |
89 | { | |
90 | next = intr->next; | |
cede9502 | 91 | free (intr); |
6de9cd9a DN |
92 | } |
93 | } | |
94 | ||
95 | ||
96 | /* Change the operators unary plus and minus into binary plus and | |
97 | minus respectively, leaving the rest unchanged. */ | |
98 | ||
99 | static gfc_intrinsic_op | |
e8d4f3fc | 100 | fold_unary_intrinsic (gfc_intrinsic_op op) |
6de9cd9a | 101 | { |
a1ee985f | 102 | switch (op) |
6de9cd9a DN |
103 | { |
104 | case INTRINSIC_UPLUS: | |
a1ee985f | 105 | op = INTRINSIC_PLUS; |
6de9cd9a DN |
106 | break; |
107 | case INTRINSIC_UMINUS: | |
a1ee985f | 108 | op = INTRINSIC_MINUS; |
6de9cd9a DN |
109 | break; |
110 | default: | |
111 | break; | |
112 | } | |
113 | ||
a1ee985f | 114 | return op; |
6de9cd9a DN |
115 | } |
116 | ||
117 | ||
195d1431 PT |
118 | /* Return the operator depending on the DTIO moded string. Note that |
119 | these are not operators in the normal sense and so have been placed | |
120 | beyond GFC_INTRINSIC_END in gfortran.h:enum gfc_intrinsic_op. */ | |
e73d3ca6 PT |
121 | |
122 | static gfc_intrinsic_op | |
123 | dtio_op (char* mode) | |
124 | { | |
2eb3745a | 125 | if (strcmp (mode, "formatted") == 0) |
e73d3ca6 | 126 | return INTRINSIC_FORMATTED; |
2eb3745a | 127 | if (strcmp (mode, "unformatted") == 0) |
e73d3ca6 PT |
128 | return INTRINSIC_UNFORMATTED; |
129 | return INTRINSIC_NONE; | |
130 | } | |
131 | ||
132 | ||
6de9cd9a | 133 | /* Match a generic specification. Depending on which type of |
a1ee985f | 134 | interface is found, the 'name' or 'op' pointers may be set. |
6de9cd9a DN |
135 | This subroutine doesn't return MATCH_NO. */ |
136 | ||
137 | match | |
b251af97 | 138 | gfc_match_generic_spec (interface_type *type, |
6de9cd9a | 139 | char *name, |
a1ee985f | 140 | gfc_intrinsic_op *op) |
6de9cd9a DN |
141 | { |
142 | char buffer[GFC_MAX_SYMBOL_LEN + 1]; | |
143 | match m; | |
144 | gfc_intrinsic_op i; | |
145 | ||
146 | if (gfc_match (" assignment ( = )") == MATCH_YES) | |
147 | { | |
148 | *type = INTERFACE_INTRINSIC_OP; | |
a1ee985f | 149 | *op = INTRINSIC_ASSIGN; |
6de9cd9a DN |
150 | return MATCH_YES; |
151 | } | |
152 | ||
153 | if (gfc_match (" operator ( %o )", &i) == MATCH_YES) | |
154 | { /* Operator i/f */ | |
155 | *type = INTERFACE_INTRINSIC_OP; | |
e8d4f3fc | 156 | *op = fold_unary_intrinsic (i); |
6de9cd9a DN |
157 | return MATCH_YES; |
158 | } | |
159 | ||
e8d4f3fc | 160 | *op = INTRINSIC_NONE; |
6de9cd9a DN |
161 | if (gfc_match (" operator ( ") == MATCH_YES) |
162 | { | |
163 | m = gfc_match_defined_op_name (buffer, 1); | |
164 | if (m == MATCH_NO) | |
165 | goto syntax; | |
166 | if (m != MATCH_YES) | |
167 | return MATCH_ERROR; | |
168 | ||
169 | m = gfc_match_char (')'); | |
170 | if (m == MATCH_NO) | |
171 | goto syntax; | |
172 | if (m != MATCH_YES) | |
173 | return MATCH_ERROR; | |
174 | ||
175 | strcpy (name, buffer); | |
176 | *type = INTERFACE_USER_OP; | |
177 | return MATCH_YES; | |
178 | } | |
179 | ||
e73d3ca6 PT |
180 | if (gfc_match (" read ( %n )", buffer) == MATCH_YES) |
181 | { | |
182 | *op = dtio_op (buffer); | |
183 | if (*op == INTRINSIC_FORMATTED) | |
184 | { | |
185 | strcpy (name, gfc_code2string (dtio_procs, DTIO_RF)); | |
186 | *type = INTERFACE_DTIO; | |
187 | } | |
188 | if (*op == INTRINSIC_UNFORMATTED) | |
189 | { | |
190 | strcpy (name, gfc_code2string (dtio_procs, DTIO_RUF)); | |
191 | *type = INTERFACE_DTIO; | |
192 | } | |
193 | if (*op != INTRINSIC_NONE) | |
194 | return MATCH_YES; | |
195 | } | |
196 | ||
197 | if (gfc_match (" write ( %n )", buffer) == MATCH_YES) | |
198 | { | |
199 | *op = dtio_op (buffer); | |
200 | if (*op == INTRINSIC_FORMATTED) | |
201 | { | |
202 | strcpy (name, gfc_code2string (dtio_procs, DTIO_WF)); | |
203 | *type = INTERFACE_DTIO; | |
204 | } | |
205 | if (*op == INTRINSIC_UNFORMATTED) | |
206 | { | |
207 | strcpy (name, gfc_code2string (dtio_procs, DTIO_WUF)); | |
208 | *type = INTERFACE_DTIO; | |
209 | } | |
210 | if (*op != INTRINSIC_NONE) | |
211 | return MATCH_YES; | |
212 | } | |
213 | ||
6de9cd9a DN |
214 | if (gfc_match_name (buffer) == MATCH_YES) |
215 | { | |
216 | strcpy (name, buffer); | |
217 | *type = INTERFACE_GENERIC; | |
218 | return MATCH_YES; | |
219 | } | |
220 | ||
221 | *type = INTERFACE_NAMELESS; | |
222 | return MATCH_YES; | |
223 | ||
224 | syntax: | |
225 | gfc_error ("Syntax error in generic specification at %C"); | |
226 | return MATCH_ERROR; | |
227 | } | |
228 | ||
229 | ||
9e1d712c TB |
230 | /* Match one of the five F95 forms of an interface statement. The |
231 | matcher for the abstract interface follows. */ | |
6de9cd9a DN |
232 | |
233 | match | |
234 | gfc_match_interface (void) | |
235 | { | |
236 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
237 | interface_type type; | |
238 | gfc_symbol *sym; | |
a1ee985f | 239 | gfc_intrinsic_op op; |
6de9cd9a DN |
240 | match m; |
241 | ||
242 | m = gfc_match_space (); | |
243 | ||
a1ee985f | 244 | if (gfc_match_generic_spec (&type, name, &op) == MATCH_ERROR) |
6de9cd9a DN |
245 | return MATCH_ERROR; |
246 | ||
6de9cd9a DN |
247 | /* If we're not looking at the end of the statement now, or if this |
248 | is not a nameless interface but we did not see a space, punt. */ | |
249 | if (gfc_match_eos () != MATCH_YES | |
b251af97 | 250 | || (type != INTERFACE_NAMELESS && m != MATCH_YES)) |
6de9cd9a | 251 | { |
b251af97 SK |
252 | gfc_error ("Syntax error: Trailing garbage in INTERFACE statement " |
253 | "at %C"); | |
6de9cd9a DN |
254 | return MATCH_ERROR; |
255 | } | |
256 | ||
257 | current_interface.type = type; | |
258 | ||
259 | switch (type) | |
260 | { | |
e73d3ca6 | 261 | case INTERFACE_DTIO: |
6de9cd9a DN |
262 | case INTERFACE_GENERIC: |
263 | if (gfc_get_symbol (name, NULL, &sym)) | |
264 | return MATCH_ERROR; | |
265 | ||
8b704316 | 266 | if (!sym->attr.generic |
524af0d6 | 267 | && !gfc_add_generic (&sym->attr, sym->name, NULL)) |
6de9cd9a DN |
268 | return MATCH_ERROR; |
269 | ||
e5d7f6f7 FXC |
270 | if (sym->attr.dummy) |
271 | { | |
c4100eae | 272 | gfc_error ("Dummy procedure %qs at %C cannot have a " |
e5d7f6f7 FXC |
273 | "generic interface", sym->name); |
274 | return MATCH_ERROR; | |
275 | } | |
276 | ||
6de9cd9a DN |
277 | current_interface.sym = gfc_new_block = sym; |
278 | break; | |
279 | ||
280 | case INTERFACE_USER_OP: | |
281 | current_interface.uop = gfc_get_uop (name); | |
282 | break; | |
283 | ||
284 | case INTERFACE_INTRINSIC_OP: | |
a1ee985f | 285 | current_interface.op = op; |
6de9cd9a DN |
286 | break; |
287 | ||
288 | case INTERFACE_NAMELESS: | |
9e1d712c | 289 | case INTERFACE_ABSTRACT: |
6de9cd9a DN |
290 | break; |
291 | } | |
292 | ||
293 | return MATCH_YES; | |
294 | } | |
295 | ||
296 | ||
9e1d712c TB |
297 | |
298 | /* Match a F2003 abstract interface. */ | |
299 | ||
300 | match | |
301 | gfc_match_abstract_interface (void) | |
302 | { | |
303 | match m; | |
304 | ||
524af0d6 | 305 | if (!gfc_notify_std (GFC_STD_F2003, "ABSTRACT INTERFACE at %C")) |
9e1d712c TB |
306 | return MATCH_ERROR; |
307 | ||
308 | m = gfc_match_eos (); | |
309 | ||
310 | if (m != MATCH_YES) | |
311 | { | |
312 | gfc_error ("Syntax error in ABSTRACT INTERFACE statement at %C"); | |
313 | return MATCH_ERROR; | |
314 | } | |
315 | ||
316 | current_interface.type = INTERFACE_ABSTRACT; | |
317 | ||
318 | return m; | |
319 | } | |
320 | ||
321 | ||
6de9cd9a DN |
322 | /* Match the different sort of generic-specs that can be present after |
323 | the END INTERFACE itself. */ | |
324 | ||
325 | match | |
326 | gfc_match_end_interface (void) | |
327 | { | |
328 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
329 | interface_type type; | |
a1ee985f | 330 | gfc_intrinsic_op op; |
6de9cd9a DN |
331 | match m; |
332 | ||
333 | m = gfc_match_space (); | |
334 | ||
a1ee985f | 335 | if (gfc_match_generic_spec (&type, name, &op) == MATCH_ERROR) |
6de9cd9a DN |
336 | return MATCH_ERROR; |
337 | ||
338 | /* If we're not looking at the end of the statement now, or if this | |
339 | is not a nameless interface but we did not see a space, punt. */ | |
340 | if (gfc_match_eos () != MATCH_YES | |
b251af97 | 341 | || (type != INTERFACE_NAMELESS && m != MATCH_YES)) |
6de9cd9a | 342 | { |
b251af97 SK |
343 | gfc_error ("Syntax error: Trailing garbage in END INTERFACE " |
344 | "statement at %C"); | |
6de9cd9a DN |
345 | return MATCH_ERROR; |
346 | } | |
347 | ||
348 | m = MATCH_YES; | |
349 | ||
350 | switch (current_interface.type) | |
351 | { | |
352 | case INTERFACE_NAMELESS: | |
9e1d712c TB |
353 | case INTERFACE_ABSTRACT: |
354 | if (type != INTERFACE_NAMELESS) | |
6de9cd9a DN |
355 | { |
356 | gfc_error ("Expected a nameless interface at %C"); | |
357 | m = MATCH_ERROR; | |
358 | } | |
359 | ||
360 | break; | |
361 | ||
362 | case INTERFACE_INTRINSIC_OP: | |
a1ee985f | 363 | if (type != current_interface.type || op != current_interface.op) |
6de9cd9a DN |
364 | { |
365 | ||
366 | if (current_interface.op == INTRINSIC_ASSIGN) | |
c6d6e62f SK |
367 | { |
368 | m = MATCH_ERROR; | |
a4d9b221 | 369 | gfc_error ("Expected %<END INTERFACE ASSIGNMENT (=)%> at %C"); |
c6d6e62f | 370 | } |
6de9cd9a | 371 | else |
c6d6e62f | 372 | { |
915acec4 | 373 | const char *s1, *s2; |
c6d6e62f SK |
374 | s1 = gfc_op2string (current_interface.op); |
375 | s2 = gfc_op2string (op); | |
376 | ||
377 | /* The following if-statements are used to enforce C1202 | |
378 | from F2003. */ | |
524af0d6 JB |
379 | if ((strcmp(s1, "==") == 0 && strcmp (s2, ".eq.") == 0) |
380 | || (strcmp(s1, ".eq.") == 0 && strcmp (s2, "==") == 0)) | |
c6d6e62f | 381 | break; |
524af0d6 JB |
382 | if ((strcmp(s1, "/=") == 0 && strcmp (s2, ".ne.") == 0) |
383 | || (strcmp(s1, ".ne.") == 0 && strcmp (s2, "/=") == 0)) | |
c6d6e62f | 384 | break; |
524af0d6 JB |
385 | if ((strcmp(s1, "<=") == 0 && strcmp (s2, ".le.") == 0) |
386 | || (strcmp(s1, ".le.") == 0 && strcmp (s2, "<=") == 0)) | |
c6d6e62f | 387 | break; |
524af0d6 JB |
388 | if ((strcmp(s1, "<") == 0 && strcmp (s2, ".lt.") == 0) |
389 | || (strcmp(s1, ".lt.") == 0 && strcmp (s2, "<") == 0)) | |
c6d6e62f | 390 | break; |
524af0d6 JB |
391 | if ((strcmp(s1, ">=") == 0 && strcmp (s2, ".ge.") == 0) |
392 | || (strcmp(s1, ".ge.") == 0 && strcmp (s2, ">=") == 0)) | |
c6d6e62f | 393 | break; |
524af0d6 JB |
394 | if ((strcmp(s1, ">") == 0 && strcmp (s2, ".gt.") == 0) |
395 | || (strcmp(s1, ".gt.") == 0 && strcmp (s2, ">") == 0)) | |
c6d6e62f SK |
396 | break; |
397 | ||
398 | m = MATCH_ERROR; | |
898344a9 SK |
399 | if (strcmp(s2, "none") == 0) |
400 | gfc_error ("Expecting %<END INTERFACE OPERATOR (%s)%> " | |
77be9417 | 401 | "at %C", s1); |
e73d3ca6 | 402 | else |
898344a9 | 403 | gfc_error ("Expecting %<END INTERFACE OPERATOR (%s)%> at %C, " |
77be9417 | 404 | "but got %qs", s1, s2); |
c6d6e62f | 405 | } |
8b704316 | 406 | |
6de9cd9a DN |
407 | } |
408 | ||
409 | break; | |
410 | ||
411 | case INTERFACE_USER_OP: | |
412 | /* Comparing the symbol node names is OK because only use-associated | |
b251af97 | 413 | symbols can be renamed. */ |
6de9cd9a | 414 | if (type != current_interface.type |
9b46f94f | 415 | || strcmp (current_interface.uop->name, name) != 0) |
6de9cd9a | 416 | { |
a4d9b221 | 417 | gfc_error ("Expecting %<END INTERFACE OPERATOR (.%s.)%> at %C", |
55898b2c | 418 | current_interface.uop->name); |
6de9cd9a DN |
419 | m = MATCH_ERROR; |
420 | } | |
421 | ||
422 | break; | |
423 | ||
e73d3ca6 | 424 | case INTERFACE_DTIO: |
6de9cd9a DN |
425 | case INTERFACE_GENERIC: |
426 | if (type != current_interface.type | |
427 | || strcmp (current_interface.sym->name, name) != 0) | |
428 | { | |
a4d9b221 | 429 | gfc_error ("Expecting %<END INTERFACE %s%> at %C", |
6de9cd9a DN |
430 | current_interface.sym->name); |
431 | m = MATCH_ERROR; | |
432 | } | |
433 | ||
434 | break; | |
435 | } | |
436 | ||
437 | return m; | |
438 | } | |
439 | ||
440 | ||
5f88e9b2 FR |
441 | /* Return whether the component was defined anonymously. */ |
442 | ||
443 | static bool | |
444 | is_anonymous_component (gfc_component *cmp) | |
445 | { | |
446 | /* Only UNION and MAP components are anonymous. In the case of a MAP, | |
447 | the derived type symbol is FL_STRUCT and the component name looks like mM*. | |
448 | This is the only case in which the second character of a component name is | |
449 | uppercase. */ | |
450 | return cmp->ts.type == BT_UNION | |
451 | || (cmp->ts.type == BT_DERIVED | |
452 | && cmp->ts.u.derived->attr.flavor == FL_STRUCT | |
453 | && cmp->name[0] && cmp->name[1] && ISUPPER (cmp->name[1])); | |
454 | } | |
455 | ||
456 | ||
457 | /* Return whether the derived type was defined anonymously. */ | |
458 | ||
459 | static bool | |
460 | is_anonymous_dt (gfc_symbol *derived) | |
461 | { | |
462 | /* UNION and MAP types are always anonymous. Otherwise, only nested STRUCTURE | |
463 | types can be anonymous. For anonymous MAP/STRUCTURE, we have FL_STRUCT | |
464 | and the type name looks like XX*. This is the only case in which the | |
465 | second character of a type name is uppercase. */ | |
466 | return derived->attr.flavor == FL_UNION | |
467 | || (derived->attr.flavor == FL_STRUCT | |
468 | && derived->name[0] && derived->name[1] && ISUPPER (derived->name[1])); | |
469 | } | |
470 | ||
471 | ||
f6288c24 FR |
472 | /* Compare components according to 4.4.2 of the Fortran standard. */ |
473 | ||
f3e1097b | 474 | static bool |
f6288c24 FR |
475 | compare_components (gfc_component *cmp1, gfc_component *cmp2, |
476 | gfc_symbol *derived1, gfc_symbol *derived2) | |
477 | { | |
5f88e9b2 FR |
478 | /* Compare names, but not for anonymous components such as UNION or MAP. */ |
479 | if (!is_anonymous_component (cmp1) && !is_anonymous_component (cmp2) | |
480 | && strcmp (cmp1->name, cmp2->name) != 0) | |
f3e1097b | 481 | return false; |
f6288c24 FR |
482 | |
483 | if (cmp1->attr.access != cmp2->attr.access) | |
f3e1097b | 484 | return false; |
f6288c24 FR |
485 | |
486 | if (cmp1->attr.pointer != cmp2->attr.pointer) | |
f3e1097b | 487 | return false; |
f6288c24 FR |
488 | |
489 | if (cmp1->attr.dimension != cmp2->attr.dimension) | |
f3e1097b | 490 | return false; |
f6288c24 FR |
491 | |
492 | if (cmp1->attr.allocatable != cmp2->attr.allocatable) | |
f3e1097b | 493 | return false; |
f6288c24 FR |
494 | |
495 | if (cmp1->attr.dimension && gfc_compare_array_spec (cmp1->as, cmp2->as) == 0) | |
f3e1097b | 496 | return false; |
f6288c24 | 497 | |
56d3a930 FR |
498 | if (cmp1->ts.type == BT_CHARACTER && cmp2->ts.type == BT_CHARACTER) |
499 | { | |
500 | gfc_charlen *l1 = cmp1->ts.u.cl; | |
501 | gfc_charlen *l2 = cmp2->ts.u.cl; | |
502 | if (l1 && l2 && l1->length && l2->length | |
503 | && l1->length->expr_type == EXPR_CONSTANT | |
504 | && l2->length->expr_type == EXPR_CONSTANT | |
505 | && gfc_dep_compare_expr (l1->length, l2->length) != 0) | |
f3e1097b | 506 | return false; |
56d3a930 FR |
507 | } |
508 | ||
f6288c24 FR |
509 | /* Make sure that link lists do not put this function into an |
510 | endless recursive loop! */ | |
511 | if (!(cmp1->ts.type == BT_DERIVED && derived1 == cmp1->ts.u.derived) | |
512 | && !(cmp2->ts.type == BT_DERIVED && derived2 == cmp2->ts.u.derived) | |
f3e1097b JW |
513 | && !gfc_compare_types (&cmp1->ts, &cmp2->ts)) |
514 | return false; | |
f6288c24 FR |
515 | |
516 | else if ( (cmp1->ts.type == BT_DERIVED && derived1 == cmp1->ts.u.derived) | |
517 | && !(cmp2->ts.type == BT_DERIVED && derived2 == cmp2->ts.u.derived)) | |
f3e1097b | 518 | return false; |
f6288c24 FR |
519 | |
520 | else if (!(cmp1->ts.type == BT_DERIVED && derived1 == cmp1->ts.u.derived) | |
521 | && (cmp2->ts.type == BT_DERIVED && derived2 == cmp2->ts.u.derived)) | |
f3e1097b | 522 | return false; |
f6288c24 | 523 | |
f3e1097b | 524 | return true; |
f6288c24 FR |
525 | } |
526 | ||
527 | ||
528 | /* Compare two union types by comparing the components of their maps. | |
529 | Because unions and maps are anonymous their types get special internal | |
530 | names; therefore the usual derived type comparison will fail on them. | |
531 | ||
532 | Returns nonzero if equal, as with gfc_compare_derived_types. Also as with | |
533 | gfc_compare_derived_types, 'equal' is closer to meaning 'duplicate | |
534 | definitions' than 'equivalent structure'. */ | |
535 | ||
f3e1097b JW |
536 | static bool |
537 | compare_union_types (gfc_symbol *un1, gfc_symbol *un2) | |
f6288c24 FR |
538 | { |
539 | gfc_component *map1, *map2, *cmp1, *cmp2; | |
c39747d2 | 540 | gfc_symbol *map1_t, *map2_t; |
f6288c24 FR |
541 | |
542 | if (un1->attr.flavor != FL_UNION || un2->attr.flavor != FL_UNION) | |
f3e1097b | 543 | return false; |
f6288c24 | 544 | |
908b8296 | 545 | if (un1->attr.zero_comp != un2->attr.zero_comp) |
f3e1097b | 546 | return false; |
908b8296 FR |
547 | |
548 | if (un1->attr.zero_comp) | |
f3e1097b | 549 | return true; |
908b8296 | 550 | |
f6288c24 FR |
551 | map1 = un1->components; |
552 | map2 = un2->components; | |
553 | ||
554 | /* In terms of 'equality' here we are worried about types which are | |
555 | declared the same in two places, not types that represent equivalent | |
556 | structures. (This is common because of FORTRAN's weird scoping rules.) | |
557 | Though two unions with their maps in different orders could be equivalent, | |
558 | we will say they are not equal for the purposes of this test; therefore | |
559 | we compare the maps sequentially. */ | |
560 | for (;;) | |
05b8fcb4 FR |
561 | { |
562 | map1_t = map1->ts.u.derived; | |
563 | map2_t = map2->ts.u.derived; | |
c39747d2 | 564 | |
05b8fcb4 FR |
565 | cmp1 = map1_t->components; |
566 | cmp2 = map2_t->components; | |
c39747d2 | 567 | |
05b8fcb4 FR |
568 | /* Protect against null components. */ |
569 | if (map1_t->attr.zero_comp != map2_t->attr.zero_comp) | |
f3e1097b | 570 | return false; |
c39747d2 | 571 | |
05b8fcb4 | 572 | if (map1_t->attr.zero_comp) |
f3e1097b | 573 | return true; |
c39747d2 | 574 | |
05b8fcb4 FR |
575 | for (;;) |
576 | { | |
577 | /* No two fields will ever point to the same map type unless they are | |
578 | the same component, because one map field is created with its type | |
579 | declaration. Therefore don't worry about recursion here. */ | |
580 | /* TODO: worry about recursion into parent types of the unions? */ | |
f3e1097b JW |
581 | if (!compare_components (cmp1, cmp2, map1_t, map2_t)) |
582 | return false; | |
05b8fcb4 FR |
583 | |
584 | cmp1 = cmp1->next; | |
585 | cmp2 = cmp2->next; | |
586 | ||
587 | if (cmp1 == NULL && cmp2 == NULL) | |
588 | break; | |
589 | if (cmp1 == NULL || cmp2 == NULL) | |
f3e1097b | 590 | return false; |
05b8fcb4 | 591 | } |
f6288c24 | 592 | |
05b8fcb4 FR |
593 | map1 = map1->next; |
594 | map2 = map2->next; | |
f6288c24 | 595 | |
05b8fcb4 FR |
596 | if (map1 == NULL && map2 == NULL) |
597 | break; | |
598 | if (map1 == NULL || map2 == NULL) | |
f3e1097b | 599 | return false; |
f6288c24 FR |
600 | } |
601 | ||
f3e1097b | 602 | return true; |
f6288c24 FR |
603 | } |
604 | ||
605 | ||
606 | ||
e0e85e06 PT |
607 | /* Compare two derived types using the criteria in 4.4.2 of the standard, |
608 | recursing through gfc_compare_types for the components. */ | |
6de9cd9a | 609 | |
f3e1097b | 610 | bool |
b251af97 | 611 | gfc_compare_derived_types (gfc_symbol *derived1, gfc_symbol *derived2) |
6de9cd9a | 612 | { |
f6288c24 | 613 | gfc_component *cmp1, *cmp2; |
6de9cd9a | 614 | |
cf2b3c22 | 615 | if (derived1 == derived2) |
f3e1097b | 616 | return true; |
cf2b3c22 | 617 | |
c7082171 SK |
618 | if (!derived1 || !derived2) |
619 | gfc_internal_error ("gfc_compare_derived_types: invalid derived type"); | |
c6423ef3 | 620 | |
00074dd8 FR |
621 | /* Compare UNION types specially. */ |
622 | if (derived1->attr.flavor == FL_UNION || derived2->attr.flavor == FL_UNION) | |
f3e1097b | 623 | return compare_union_types (derived1, derived2); |
00074dd8 | 624 | |
6de9cd9a DN |
625 | /* Special case for comparing derived types across namespaces. If the |
626 | true names and module names are the same and the module name is | |
627 | nonnull, then they are equal. */ | |
c6423ef3 | 628 | if (strcmp (derived1->name, derived2->name) == 0 |
b251af97 SK |
629 | && derived1->module != NULL && derived2->module != NULL |
630 | && strcmp (derived1->module, derived2->module) == 0) | |
f3e1097b | 631 | return true; |
6de9cd9a DN |
632 | |
633 | /* Compare type via the rules of the standard. Both types must have | |
f6288c24 FR |
634 | the SEQUENCE or BIND(C) attribute to be equal. STRUCTUREs are special |
635 | because they can be anonymous; therefore two structures with different | |
636 | names may be equal. */ | |
6de9cd9a | 637 | |
5f88e9b2 FR |
638 | /* Compare names, but not for anonymous types such as UNION or MAP. */ |
639 | if (!is_anonymous_dt (derived1) && !is_anonymous_dt (derived2) | |
640 | && strcmp (derived1->name, derived2->name) != 0) | |
f3e1097b | 641 | return false; |
6de9cd9a | 642 | |
e0e85e06 | 643 | if (derived1->component_access == ACCESS_PRIVATE |
b251af97 | 644 | || derived2->component_access == ACCESS_PRIVATE) |
f3e1097b | 645 | return false; |
6de9cd9a | 646 | |
a9e88ec6 | 647 | if (!(derived1->attr.sequence && derived2->attr.sequence) |
5bab4c96 PT |
648 | && !(derived1->attr.is_bind_c && derived2->attr.is_bind_c) |
649 | && !(derived1->attr.pdt_type && derived2->attr.pdt_type)) | |
f3e1097b | 650 | return false; |
6de9cd9a | 651 | |
f6288c24 FR |
652 | /* Protect against null components. */ |
653 | if (derived1->attr.zero_comp != derived2->attr.zero_comp) | |
f3e1097b | 654 | return false; |
f6288c24 FR |
655 | |
656 | if (derived1->attr.zero_comp) | |
f3e1097b | 657 | return true; |
f6288c24 FR |
658 | |
659 | cmp1 = derived1->components; | |
660 | cmp2 = derived2->components; | |
e0e85e06 | 661 | |
6de9cd9a DN |
662 | /* Since subtypes of SEQUENCE types must be SEQUENCE types as well, a |
663 | simple test can speed things up. Otherwise, lots of things have to | |
664 | match. */ | |
665 | for (;;) | |
666 | { | |
f6288c24 | 667 | if (!compare_components (cmp1, cmp2, derived1, derived2)) |
f3e1097b | 668 | return false; |
6de9cd9a | 669 | |
f6288c24 FR |
670 | cmp1 = cmp1->next; |
671 | cmp2 = cmp2->next; | |
2eae3dc7 | 672 | |
f6288c24 | 673 | if (cmp1 == NULL && cmp2 == NULL) |
6de9cd9a | 674 | break; |
f6288c24 | 675 | if (cmp1 == NULL || cmp2 == NULL) |
f3e1097b | 676 | return false; |
6de9cd9a DN |
677 | } |
678 | ||
f3e1097b | 679 | return true; |
6de9cd9a DN |
680 | } |
681 | ||
b251af97 | 682 | |
e0e85e06 PT |
683 | /* Compare two typespecs, recursively if necessary. */ |
684 | ||
f3e1097b | 685 | bool |
b251af97 | 686 | gfc_compare_types (gfc_typespec *ts1, gfc_typespec *ts2) |
e0e85e06 | 687 | { |
a8b3b0b6 CR |
688 | /* See if one of the typespecs is a BT_VOID, which is what is being used |
689 | to allow the funcs like c_f_pointer to accept any pointer type. | |
690 | TODO: Possibly should narrow this to just the one typespec coming in | |
691 | that is for the formal arg, but oh well. */ | |
692 | if (ts1->type == BT_VOID || ts2->type == BT_VOID) | |
f3e1097b | 693 | return true; |
8b704316 | 694 | |
5af5f1de TK |
695 | /* Special case for our C interop types. FIXME: There should be a |
696 | better way of doing this. When ISO C binding is cleared up, | |
697 | this can probably be removed. See PR 57048. */ | |
698 | ||
699 | if (((ts1->type == BT_INTEGER && ts2->type == BT_DERIVED) | |
700 | || (ts1->type == BT_DERIVED && ts2->type == BT_INTEGER)) | |
701 | && ts1->u.derived && ts2->u.derived | |
702 | && ts1->u.derived == ts2->u.derived) | |
703 | return true; | |
704 | ||
77b7d71e AV |
705 | /* The _data component is not always present, therefore check for its |
706 | presence before assuming, that its derived->attr is available. | |
707 | When the _data component is not present, then nevertheless the | |
708 | unlimited_polymorphic flag may be set in the derived type's attr. */ | |
709 | if (ts1->type == BT_CLASS && ts1->u.derived->components | |
710 | && ((ts1->u.derived->attr.is_class | |
711 | && ts1->u.derived->components->ts.u.derived->attr | |
712 | .unlimited_polymorphic) | |
713 | || ts1->u.derived->attr.unlimited_polymorphic)) | |
f3e1097b | 714 | return true; |
8b704316 PT |
715 | |
716 | /* F2003: C717 */ | |
717 | if (ts2->type == BT_CLASS && ts1->type == BT_DERIVED | |
77b7d71e AV |
718 | && ts2->u.derived->components |
719 | && ((ts2->u.derived->attr.is_class | |
720 | && ts2->u.derived->components->ts.u.derived->attr | |
721 | .unlimited_polymorphic) | |
722 | || ts2->u.derived->attr.unlimited_polymorphic) | |
8b704316 | 723 | && (ts1->u.derived->attr.sequence || ts1->u.derived->attr.is_bind_c)) |
f3e1097b | 724 | return true; |
8b704316 | 725 | |
cf2b3c22 | 726 | if (ts1->type != ts2->type |
908b8296 FR |
727 | && ((ts1->type != BT_DERIVED && ts1->type != BT_CLASS) |
728 | || (ts2->type != BT_DERIVED && ts2->type != BT_CLASS))) | |
f3e1097b | 729 | return false; |
908b8296 FR |
730 | |
731 | if (ts1->type == BT_UNION) | |
f3e1097b | 732 | return compare_union_types (ts1->u.derived, ts2->u.derived); |
908b8296 | 733 | |
cf2b3c22 | 734 | if (ts1->type != BT_DERIVED && ts1->type != BT_CLASS) |
e0e85e06 PT |
735 | return (ts1->kind == ts2->kind); |
736 | ||
737 | /* Compare derived types. */ | |
f6288c24 | 738 | return gfc_type_compatible (ts1, ts2); |
e0e85e06 PT |
739 | } |
740 | ||
6de9cd9a | 741 | |
f3e1097b | 742 | static bool |
e7333b69 JW |
743 | compare_type (gfc_symbol *s1, gfc_symbol *s2) |
744 | { | |
745 | if (s2->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK)) | |
f3e1097b | 746 | return true; |
e7333b69 | 747 | |
0ce0e6e8 JW |
748 | return gfc_compare_types (&s1->ts, &s2->ts) || s2->ts.type == BT_ASSUMED; |
749 | } | |
750 | ||
751 | ||
752 | static bool | |
753 | compare_type_characteristics (gfc_symbol *s1, gfc_symbol *s2) | |
754 | { | |
60de1c7d TB |
755 | /* TYPE and CLASS of the same declared type are type compatible, |
756 | but have different characteristics. */ | |
757 | if ((s1->ts.type == BT_CLASS && s2->ts.type == BT_DERIVED) | |
758 | || (s1->ts.type == BT_DERIVED && s2->ts.type == BT_CLASS)) | |
f3e1097b | 759 | return false; |
60de1c7d | 760 | |
0ce0e6e8 | 761 | return compare_type (s1, s2); |
e7333b69 JW |
762 | } |
763 | ||
6de9cd9a | 764 | |
f3e1097b | 765 | static bool |
e7333b69 | 766 | compare_rank (gfc_symbol *s1, gfc_symbol *s2) |
6de9cd9a | 767 | { |
aa6590cf | 768 | gfc_array_spec *as1, *as2; |
6de9cd9a DN |
769 | int r1, r2; |
770 | ||
e7333b69 | 771 | if (s2->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK)) |
f3e1097b | 772 | return true; |
e7ac6a7c | 773 | |
75a3c61a LK |
774 | as1 = (s1->ts.type == BT_CLASS |
775 | && !s1->ts.u.derived->attr.unlimited_polymorphic) | |
776 | ? CLASS_DATA (s1)->as : s1->as; | |
777 | as2 = (s2->ts.type == BT_CLASS | |
778 | && !s2->ts.u.derived->attr.unlimited_polymorphic) | |
779 | ? CLASS_DATA (s2)->as : s2->as; | |
aa6590cf JW |
780 | |
781 | r1 = as1 ? as1->rank : 0; | |
782 | r2 = as2 ? as2->rank : 0; | |
6de9cd9a | 783 | |
e7333b69 | 784 | if (r1 != r2 && (!as2 || as2->type != AS_ASSUMED_RANK)) |
f3e1097b | 785 | return false; /* Ranks differ. */ |
6de9cd9a | 786 | |
f3e1097b | 787 | return true; |
e7333b69 JW |
788 | } |
789 | ||
790 | ||
791 | /* Given two symbols that are formal arguments, compare their ranks | |
f3e1097b JW |
792 | and types. Returns true if they have the same rank and type, |
793 | false otherwise. */ | |
e7333b69 | 794 | |
f3e1097b | 795 | static bool |
e7333b69 JW |
796 | compare_type_rank (gfc_symbol *s1, gfc_symbol *s2) |
797 | { | |
798 | return compare_type (s1, s2) && compare_rank (s1, s2); | |
6de9cd9a DN |
799 | } |
800 | ||
801 | ||
6de9cd9a DN |
802 | /* Given two symbols that are formal arguments, compare their types |
803 | and rank and their formal interfaces if they are both dummy | |
f3e1097b | 804 | procedures. Returns true if the same, false if different. */ |
6de9cd9a | 805 | |
f3e1097b | 806 | static bool |
b251af97 | 807 | compare_type_rank_if (gfc_symbol *s1, gfc_symbol *s2) |
6de9cd9a | 808 | { |
26f2ca2b | 809 | if (s1 == NULL || s2 == NULL) |
f3e1097b | 810 | return (s1 == s2); |
6de9cd9a | 811 | |
489ec4e3 | 812 | if (s1 == s2) |
f3e1097b | 813 | return true; |
489ec4e3 | 814 | |
6de9cd9a DN |
815 | if (s1->attr.flavor != FL_PROCEDURE && s2->attr.flavor != FL_PROCEDURE) |
816 | return compare_type_rank (s1, s2); | |
817 | ||
818 | if (s1->attr.flavor != FL_PROCEDURE || s2->attr.flavor != FL_PROCEDURE) | |
f3e1097b | 819 | return false; |
6de9cd9a | 820 | |
489ec4e3 PT |
821 | /* At this point, both symbols are procedures. It can happen that |
822 | external procedures are compared, where one is identified by usage | |
823 | to be a function or subroutine but the other is not. Check TKR | |
824 | nonetheless for these cases. */ | |
825 | if (s1->attr.function == 0 && s1->attr.subroutine == 0) | |
f3e1097b | 826 | return s1->attr.external ? compare_type_rank (s1, s2) : false; |
489ec4e3 PT |
827 | |
828 | if (s2->attr.function == 0 && s2->attr.subroutine == 0) | |
f3e1097b | 829 | return s2->attr.external ? compare_type_rank (s1, s2) : false; |
6de9cd9a | 830 | |
489ec4e3 | 831 | /* Now the type of procedure has been identified. */ |
6de9cd9a DN |
832 | if (s1->attr.function != s2->attr.function |
833 | || s1->attr.subroutine != s2->attr.subroutine) | |
f3e1097b | 834 | return false; |
6de9cd9a | 835 | |
f3e1097b JW |
836 | if (s1->attr.function && !compare_type_rank (s1, s2)) |
837 | return false; | |
6de9cd9a | 838 | |
993ef28f PT |
839 | /* Originally, gfortran recursed here to check the interfaces of passed |
840 | procedures. This is explicitly not required by the standard. */ | |
f3e1097b | 841 | return true; |
6de9cd9a DN |
842 | } |
843 | ||
844 | ||
845 | /* Given a formal argument list and a keyword name, search the list | |
846 | for that keyword. Returns the correct symbol node if found, NULL | |
847 | if not found. */ | |
848 | ||
849 | static gfc_symbol * | |
b251af97 | 850 | find_keyword_arg (const char *name, gfc_formal_arglist *f) |
6de9cd9a | 851 | { |
6de9cd9a DN |
852 | for (; f; f = f->next) |
853 | if (strcmp (f->sym->name, name) == 0) | |
854 | return f->sym; | |
855 | ||
856 | return NULL; | |
857 | } | |
858 | ||
859 | ||
860 | /******** Interface checking subroutines **********/ | |
861 | ||
862 | ||
863 | /* Given an operator interface and the operator, make sure that all | |
864 | interfaces for that operator are legal. */ | |
865 | ||
94747289 DK |
866 | bool |
867 | gfc_check_operator_interface (gfc_symbol *sym, gfc_intrinsic_op op, | |
868 | locus opwhere) | |
6de9cd9a DN |
869 | { |
870 | gfc_formal_arglist *formal; | |
871 | sym_intent i1, i2; | |
6de9cd9a | 872 | bt t1, t2; |
27189292 | 873 | int args, r1, r2, k1, k2; |
6de9cd9a | 874 | |
94747289 | 875 | gcc_assert (sym); |
6de9cd9a DN |
876 | |
877 | args = 0; | |
878 | t1 = t2 = BT_UNKNOWN; | |
879 | i1 = i2 = INTENT_UNKNOWN; | |
27189292 FXC |
880 | r1 = r2 = -1; |
881 | k1 = k2 = -1; | |
6de9cd9a | 882 | |
4cbc9039 | 883 | for (formal = gfc_sym_get_dummy_args (sym); formal; formal = formal->next) |
6de9cd9a | 884 | { |
94747289 DK |
885 | gfc_symbol *fsym = formal->sym; |
886 | if (fsym == NULL) | |
8c086c9c PT |
887 | { |
888 | gfc_error ("Alternate return cannot appear in operator " | |
94747289 DK |
889 | "interface at %L", &sym->declared_at); |
890 | return false; | |
8c086c9c | 891 | } |
6de9cd9a DN |
892 | if (args == 0) |
893 | { | |
94747289 DK |
894 | t1 = fsym->ts.type; |
895 | i1 = fsym->attr.intent; | |
896 | r1 = (fsym->as != NULL) ? fsym->as->rank : 0; | |
897 | k1 = fsym->ts.kind; | |
6de9cd9a DN |
898 | } |
899 | if (args == 1) | |
900 | { | |
94747289 DK |
901 | t2 = fsym->ts.type; |
902 | i2 = fsym->attr.intent; | |
903 | r2 = (fsym->as != NULL) ? fsym->as->rank : 0; | |
904 | k2 = fsym->ts.kind; | |
6de9cd9a DN |
905 | } |
906 | args++; | |
907 | } | |
908 | ||
27189292 FXC |
909 | /* Only +, - and .not. can be unary operators. |
910 | .not. cannot be a binary operator. */ | |
a1ee985f KG |
911 | if (args == 0 || args > 2 || (args == 1 && op != INTRINSIC_PLUS |
912 | && op != INTRINSIC_MINUS | |
913 | && op != INTRINSIC_NOT) | |
914 | || (args == 2 && op == INTRINSIC_NOT)) | |
27189292 | 915 | { |
efb63364 TB |
916 | if (op == INTRINSIC_ASSIGN) |
917 | gfc_error ("Assignment operator interface at %L must have " | |
918 | "two arguments", &sym->declared_at); | |
919 | else | |
920 | gfc_error ("Operator interface at %L has the wrong number of arguments", | |
921 | &sym->declared_at); | |
94747289 | 922 | return false; |
27189292 FXC |
923 | } |
924 | ||
925 | /* Check that intrinsics are mapped to functions, except | |
926 | INTRINSIC_ASSIGN which should map to a subroutine. */ | |
a1ee985f | 927 | if (op == INTRINSIC_ASSIGN) |
6de9cd9a | 928 | { |
4cbc9039 JW |
929 | gfc_formal_arglist *dummy_args; |
930 | ||
6de9cd9a DN |
931 | if (!sym->attr.subroutine) |
932 | { | |
b251af97 | 933 | gfc_error ("Assignment operator interface at %L must be " |
94747289 DK |
934 | "a SUBROUTINE", &sym->declared_at); |
935 | return false; | |
6de9cd9a | 936 | } |
e19bb186 TB |
937 | |
938 | /* Allowed are (per F2003, 12.3.2.1.2 Defined assignments): | |
94747289 | 939 | - First argument an array with different rank than second, |
315d905f TB |
940 | - First argument is a scalar and second an array, |
941 | - Types and kinds do not conform, or | |
94747289 | 942 | - First argument is of derived type. */ |
4cbc9039 JW |
943 | dummy_args = gfc_sym_get_dummy_args (sym); |
944 | if (dummy_args->sym->ts.type != BT_DERIVED | |
945 | && dummy_args->sym->ts.type != BT_CLASS | |
315d905f | 946 | && (r2 == 0 || r1 == r2) |
4cbc9039 JW |
947 | && (dummy_args->sym->ts.type == dummy_args->next->sym->ts.type |
948 | || (gfc_numeric_ts (&dummy_args->sym->ts) | |
949 | && gfc_numeric_ts (&dummy_args->next->sym->ts)))) | |
8c086c9c | 950 | { |
b251af97 | 951 | gfc_error ("Assignment operator interface at %L must not redefine " |
94747289 DK |
952 | "an INTRINSIC type assignment", &sym->declared_at); |
953 | return false; | |
8c086c9c | 954 | } |
6de9cd9a DN |
955 | } |
956 | else | |
957 | { | |
958 | if (!sym->attr.function) | |
959 | { | |
960 | gfc_error ("Intrinsic operator interface at %L must be a FUNCTION", | |
94747289 DK |
961 | &sym->declared_at); |
962 | return false; | |
6de9cd9a DN |
963 | } |
964 | } | |
965 | ||
27189292 | 966 | /* Check intents on operator interfaces. */ |
a1ee985f | 967 | if (op == INTRINSIC_ASSIGN) |
6de9cd9a | 968 | { |
27189292 | 969 | if (i1 != INTENT_OUT && i1 != INTENT_INOUT) |
94747289 DK |
970 | { |
971 | gfc_error ("First argument of defined assignment at %L must be " | |
972 | "INTENT(OUT) or INTENT(INOUT)", &sym->declared_at); | |
973 | return false; | |
974 | } | |
27189292 FXC |
975 | |
976 | if (i2 != INTENT_IN) | |
94747289 DK |
977 | { |
978 | gfc_error ("Second argument of defined assignment at %L must be " | |
979 | "INTENT(IN)", &sym->declared_at); | |
980 | return false; | |
981 | } | |
27189292 FXC |
982 | } |
983 | else | |
984 | { | |
985 | if (i1 != INTENT_IN) | |
94747289 DK |
986 | { |
987 | gfc_error ("First argument of operator interface at %L must be " | |
988 | "INTENT(IN)", &sym->declared_at); | |
989 | return false; | |
990 | } | |
27189292 FXC |
991 | |
992 | if (args == 2 && i2 != INTENT_IN) | |
94747289 DK |
993 | { |
994 | gfc_error ("Second argument of operator interface at %L must be " | |
995 | "INTENT(IN)", &sym->declared_at); | |
996 | return false; | |
997 | } | |
27189292 FXC |
998 | } |
999 | ||
1000 | /* From now on, all we have to do is check that the operator definition | |
1001 | doesn't conflict with an intrinsic operator. The rules for this | |
1002 | game are defined in 7.1.2 and 7.1.3 of both F95 and F2003 standards, | |
1003 | as well as 12.3.2.1.1 of Fortran 2003: | |
1004 | ||
1005 | "If the operator is an intrinsic-operator (R310), the number of | |
1006 | function arguments shall be consistent with the intrinsic uses of | |
1007 | that operator, and the types, kind type parameters, or ranks of the | |
1008 | dummy arguments shall differ from those required for the intrinsic | |
1009 | operation (7.1.2)." */ | |
1010 | ||
1011 | #define IS_NUMERIC_TYPE(t) \ | |
1012 | ((t) == BT_INTEGER || (t) == BT_REAL || (t) == BT_COMPLEX) | |
1013 | ||
1014 | /* Unary ops are easy, do them first. */ | |
a1ee985f | 1015 | if (op == INTRINSIC_NOT) |
27189292 FXC |
1016 | { |
1017 | if (t1 == BT_LOGICAL) | |
6de9cd9a | 1018 | goto bad_repl; |
27189292 | 1019 | else |
94747289 | 1020 | return true; |
27189292 | 1021 | } |
6de9cd9a | 1022 | |
a1ee985f | 1023 | if (args == 1 && (op == INTRINSIC_PLUS || op == INTRINSIC_MINUS)) |
27189292 FXC |
1024 | { |
1025 | if (IS_NUMERIC_TYPE (t1)) | |
6de9cd9a | 1026 | goto bad_repl; |
27189292 | 1027 | else |
94747289 | 1028 | return true; |
27189292 | 1029 | } |
6de9cd9a | 1030 | |
27189292 FXC |
1031 | /* Character intrinsic operators have same character kind, thus |
1032 | operator definitions with operands of different character kinds | |
1033 | are always safe. */ | |
1034 | if (t1 == BT_CHARACTER && t2 == BT_CHARACTER && k1 != k2) | |
94747289 | 1035 | return true; |
6de9cd9a | 1036 | |
27189292 FXC |
1037 | /* Intrinsic operators always perform on arguments of same rank, |
1038 | so different ranks is also always safe. (rank == 0) is an exception | |
1039 | to that, because all intrinsic operators are elemental. */ | |
1040 | if (r1 != r2 && r1 != 0 && r2 != 0) | |
94747289 | 1041 | return true; |
6de9cd9a | 1042 | |
a1ee985f | 1043 | switch (op) |
27189292 | 1044 | { |
6de9cd9a | 1045 | case INTRINSIC_EQ: |
3bed9dd0 | 1046 | case INTRINSIC_EQ_OS: |
6de9cd9a | 1047 | case INTRINSIC_NE: |
3bed9dd0 | 1048 | case INTRINSIC_NE_OS: |
27189292 | 1049 | if (t1 == BT_CHARACTER && t2 == BT_CHARACTER) |
6de9cd9a | 1050 | goto bad_repl; |
27189292 | 1051 | /* Fall through. */ |
6de9cd9a | 1052 | |
27189292 FXC |
1053 | case INTRINSIC_PLUS: |
1054 | case INTRINSIC_MINUS: | |
1055 | case INTRINSIC_TIMES: | |
1056 | case INTRINSIC_DIVIDE: | |
1057 | case INTRINSIC_POWER: | |
1058 | if (IS_NUMERIC_TYPE (t1) && IS_NUMERIC_TYPE (t2)) | |
1059 | goto bad_repl; | |
6de9cd9a DN |
1060 | break; |
1061 | ||
6de9cd9a | 1062 | case INTRINSIC_GT: |
3bed9dd0 | 1063 | case INTRINSIC_GT_OS: |
27189292 | 1064 | case INTRINSIC_GE: |
3bed9dd0 | 1065 | case INTRINSIC_GE_OS: |
27189292 | 1066 | case INTRINSIC_LT: |
3bed9dd0 | 1067 | case INTRINSIC_LT_OS: |
27189292 | 1068 | case INTRINSIC_LE: |
3bed9dd0 | 1069 | case INTRINSIC_LE_OS: |
27189292 FXC |
1070 | if (t1 == BT_CHARACTER && t2 == BT_CHARACTER) |
1071 | goto bad_repl; | |
6de9cd9a DN |
1072 | if ((t1 == BT_INTEGER || t1 == BT_REAL) |
1073 | && (t2 == BT_INTEGER || t2 == BT_REAL)) | |
1074 | goto bad_repl; | |
27189292 | 1075 | break; |
6de9cd9a | 1076 | |
27189292 FXC |
1077 | case INTRINSIC_CONCAT: |
1078 | if (t1 == BT_CHARACTER && t2 == BT_CHARACTER) | |
1079 | goto bad_repl; | |
6de9cd9a DN |
1080 | break; |
1081 | ||
6de9cd9a | 1082 | case INTRINSIC_AND: |
27189292 | 1083 | case INTRINSIC_OR: |
6de9cd9a DN |
1084 | case INTRINSIC_EQV: |
1085 | case INTRINSIC_NEQV: | |
6de9cd9a DN |
1086 | if (t1 == BT_LOGICAL && t2 == BT_LOGICAL) |
1087 | goto bad_repl; | |
1088 | break; | |
1089 | ||
6de9cd9a | 1090 | default: |
27189292 FXC |
1091 | break; |
1092 | } | |
6de9cd9a | 1093 | |
94747289 | 1094 | return true; |
6de9cd9a | 1095 | |
27189292 FXC |
1096 | #undef IS_NUMERIC_TYPE |
1097 | ||
6de9cd9a DN |
1098 | bad_repl: |
1099 | gfc_error ("Operator interface at %L conflicts with intrinsic interface", | |
94747289 DK |
1100 | &opwhere); |
1101 | return false; | |
6de9cd9a DN |
1102 | } |
1103 | ||
1104 | ||
1105 | /* Given a pair of formal argument lists, we see if the two lists can | |
1106 | be distinguished by counting the number of nonoptional arguments of | |
1107 | a given type/rank in f1 and seeing if there are less then that | |
1108 | number of those arguments in f2 (including optional arguments). | |
1109 | Since this test is asymmetric, it has to be called twice to make it | |
6f3ab30d JW |
1110 | symmetric. Returns nonzero if the argument lists are incompatible |
1111 | by this test. This subroutine implements rule 1 of section F03:16.2.3. | |
1112 | 'p1' and 'p2' are the PASS arguments of both procedures (if applicable). */ | |
6de9cd9a | 1113 | |
f3e1097b | 1114 | static bool |
6f3ab30d JW |
1115 | count_types_test (gfc_formal_arglist *f1, gfc_formal_arglist *f2, |
1116 | const char *p1, const char *p2) | |
6de9cd9a | 1117 | { |
f3e1097b | 1118 | int ac1, ac2, i, j, k, n1; |
6de9cd9a DN |
1119 | gfc_formal_arglist *f; |
1120 | ||
1121 | typedef struct | |
1122 | { | |
1123 | int flag; | |
1124 | gfc_symbol *sym; | |
1125 | } | |
1126 | arginfo; | |
1127 | ||
1128 | arginfo *arg; | |
1129 | ||
1130 | n1 = 0; | |
1131 | ||
1132 | for (f = f1; f; f = f->next) | |
1133 | n1++; | |
1134 | ||
1135 | /* Build an array of integers that gives the same integer to | |
1136 | arguments of the same type/rank. */ | |
ece3f663 | 1137 | arg = XCNEWVEC (arginfo, n1); |
6de9cd9a DN |
1138 | |
1139 | f = f1; | |
1140 | for (i = 0; i < n1; i++, f = f->next) | |
1141 | { | |
1142 | arg[i].flag = -1; | |
1143 | arg[i].sym = f->sym; | |
1144 | } | |
1145 | ||
1146 | k = 0; | |
1147 | ||
1148 | for (i = 0; i < n1; i++) | |
1149 | { | |
1150 | if (arg[i].flag != -1) | |
1151 | continue; | |
1152 | ||
6f3ab30d JW |
1153 | if (arg[i].sym && (arg[i].sym->attr.optional |
1154 | || (p1 && strcmp (arg[i].sym->name, p1) == 0))) | |
1155 | continue; /* Skip OPTIONAL and PASS arguments. */ | |
6de9cd9a DN |
1156 | |
1157 | arg[i].flag = k; | |
1158 | ||
6f3ab30d | 1159 | /* Find other non-optional, non-pass arguments of the same type/rank. */ |
6de9cd9a | 1160 | for (j = i + 1; j < n1; j++) |
6f3ab30d JW |
1161 | if ((arg[j].sym == NULL |
1162 | || !(arg[j].sym->attr.optional | |
1163 | || (p1 && strcmp (arg[j].sym->name, p1) == 0))) | |
2b603773 JW |
1164 | && (compare_type_rank_if (arg[i].sym, arg[j].sym) |
1165 | || compare_type_rank_if (arg[j].sym, arg[i].sym))) | |
6de9cd9a DN |
1166 | arg[j].flag = k; |
1167 | ||
1168 | k++; | |
1169 | } | |
1170 | ||
1171 | /* Now loop over each distinct type found in f1. */ | |
1172 | k = 0; | |
f3e1097b | 1173 | bool rc = false; |
6de9cd9a DN |
1174 | |
1175 | for (i = 0; i < n1; i++) | |
1176 | { | |
1177 | if (arg[i].flag != k) | |
1178 | continue; | |
1179 | ||
1180 | ac1 = 1; | |
1181 | for (j = i + 1; j < n1; j++) | |
1182 | if (arg[j].flag == k) | |
1183 | ac1++; | |
1184 | ||
6f3ab30d JW |
1185 | /* Count the number of non-pass arguments in f2 with that type, |
1186 | including those that are optional. */ | |
6de9cd9a DN |
1187 | ac2 = 0; |
1188 | ||
1189 | for (f = f2; f; f = f->next) | |
6f3ab30d JW |
1190 | if ((!p2 || strcmp (f->sym->name, p2) != 0) |
1191 | && (compare_type_rank_if (arg[i].sym, f->sym) | |
1192 | || compare_type_rank_if (f->sym, arg[i].sym))) | |
6de9cd9a DN |
1193 | ac2++; |
1194 | ||
1195 | if (ac1 > ac2) | |
1196 | { | |
f3e1097b | 1197 | rc = true; |
6de9cd9a DN |
1198 | break; |
1199 | } | |
1200 | ||
1201 | k++; | |
1202 | } | |
1203 | ||
cede9502 | 1204 | free (arg); |
6de9cd9a DN |
1205 | |
1206 | return rc; | |
1207 | } | |
1208 | ||
1209 | ||
c7927c3b JW |
1210 | /* Returns true if two dummy arguments are distinguishable due to their POINTER |
1211 | and ALLOCATABLE attributes according to F2018 section 15.4.3.4.5 (3). | |
1212 | The function is asymmetric wrt to the arguments s1 and s2 and should always | |
1213 | be called twice (with flipped arguments in the second call). */ | |
1214 | ||
1215 | static bool | |
1216 | compare_ptr_alloc(gfc_symbol *s1, gfc_symbol *s2) | |
1217 | { | |
1218 | /* Is s1 allocatable? */ | |
1219 | const bool a1 = s1->ts.type == BT_CLASS ? | |
1220 | CLASS_DATA(s1)->attr.allocatable : s1->attr.allocatable; | |
1221 | /* Is s2 a pointer? */ | |
1222 | const bool p2 = s2->ts.type == BT_CLASS ? | |
1223 | CLASS_DATA(s2)->attr.class_pointer : s2->attr.pointer; | |
1224 | return a1 && p2 && (s2->attr.intent != INTENT_IN); | |
1225 | } | |
1226 | ||
1227 | ||
e9355cc3 JW |
1228 | /* Perform the correspondence test in rule (3) of F08:C1215. |
1229 | Returns zero if no argument is found that satisfies this rule, | |
1230 | nonzero otherwise. 'p1' and 'p2' are the PASS arguments of both procedures | |
6f3ab30d | 1231 | (if applicable). |
6de9cd9a DN |
1232 | |
1233 | This test is also not symmetric in f1 and f2 and must be called | |
1234 | twice. This test finds problems caused by sorting the actual | |
1235 | argument list with keywords. For example: | |
1236 | ||
1237 | INTERFACE FOO | |
e9355cc3 JW |
1238 | SUBROUTINE F1(A, B) |
1239 | INTEGER :: A ; REAL :: B | |
1240 | END SUBROUTINE F1 | |
6de9cd9a | 1241 | |
e9355cc3 JW |
1242 | SUBROUTINE F2(B, A) |
1243 | INTEGER :: A ; REAL :: B | |
1244 | END SUBROUTINE F1 | |
6de9cd9a DN |
1245 | END INTERFACE FOO |
1246 | ||
1247 | At this point, 'CALL FOO(A=1, B=1.0)' is ambiguous. */ | |
1248 | ||
f3e1097b | 1249 | static bool |
6f3ab30d JW |
1250 | generic_correspondence (gfc_formal_arglist *f1, gfc_formal_arglist *f2, |
1251 | const char *p1, const char *p2) | |
6de9cd9a | 1252 | { |
6de9cd9a DN |
1253 | gfc_formal_arglist *f2_save, *g; |
1254 | gfc_symbol *sym; | |
1255 | ||
1256 | f2_save = f2; | |
1257 | ||
1258 | while (f1) | |
1259 | { | |
1260 | if (f1->sym->attr.optional) | |
1261 | goto next; | |
1262 | ||
6f3ab30d JW |
1263 | if (p1 && strcmp (f1->sym->name, p1) == 0) |
1264 | f1 = f1->next; | |
1265 | if (f2 && p2 && strcmp (f2->sym->name, p2) == 0) | |
1266 | f2 = f2->next; | |
1267 | ||
2b603773 | 1268 | if (f2 != NULL && (compare_type_rank (f1->sym, f2->sym) |
e9355cc3 JW |
1269 | || compare_type_rank (f2->sym, f1->sym)) |
1270 | && !((gfc_option.allow_std & GFC_STD_F2008) | |
c7927c3b JW |
1271 | && (compare_ptr_alloc(f1->sym, f2->sym) |
1272 | || compare_ptr_alloc(f2->sym, f1->sym)))) | |
6de9cd9a DN |
1273 | goto next; |
1274 | ||
1275 | /* Now search for a disambiguating keyword argument starting at | |
b251af97 | 1276 | the current non-match. */ |
6de9cd9a DN |
1277 | for (g = f1; g; g = g->next) |
1278 | { | |
6f3ab30d | 1279 | if (g->sym->attr.optional || (p1 && strcmp (g->sym->name, p1) == 0)) |
6de9cd9a DN |
1280 | continue; |
1281 | ||
1282 | sym = find_keyword_arg (g->sym->name, f2_save); | |
e9355cc3 JW |
1283 | if (sym == NULL || !compare_type_rank (g->sym, sym) |
1284 | || ((gfc_option.allow_std & GFC_STD_F2008) | |
c7927c3b JW |
1285 | && (compare_ptr_alloc(sym, g->sym) |
1286 | || compare_ptr_alloc(g->sym, sym)))) | |
f3e1097b | 1287 | return true; |
6de9cd9a DN |
1288 | } |
1289 | ||
1290 | next: | |
6f3ab30d JW |
1291 | if (f1 != NULL) |
1292 | f1 = f1->next; | |
6de9cd9a DN |
1293 | if (f2 != NULL) |
1294 | f2 = f2->next; | |
1295 | } | |
1296 | ||
f3e1097b | 1297 | return false; |
6de9cd9a DN |
1298 | } |
1299 | ||
1300 | ||
e7333b69 JW |
1301 | static int |
1302 | symbol_rank (gfc_symbol *sym) | |
1303 | { | |
1fb84d5b SK |
1304 | gfc_array_spec *as = NULL; |
1305 | ||
f11600c9 | 1306 | if (sym->ts.type == BT_CLASS && CLASS_DATA (sym)) |
1fb84d5b SK |
1307 | as = CLASS_DATA (sym)->as; |
1308 | else | |
1309 | as = sym->as; | |
1310 | ||
e7333b69 JW |
1311 | return as ? as->rank : 0; |
1312 | } | |
1313 | ||
1314 | ||
9795c594 JW |
1315 | /* Check if the characteristics of two dummy arguments match, |
1316 | cf. F08:12.3.2. */ | |
1317 | ||
4668d6f9 PT |
1318 | bool |
1319 | gfc_check_dummy_characteristics (gfc_symbol *s1, gfc_symbol *s2, | |
1320 | bool type_must_agree, char *errmsg, | |
1321 | int err_len) | |
9795c594 | 1322 | { |
9362a03b | 1323 | if (s1 == NULL || s2 == NULL) |
524af0d6 | 1324 | return s1 == s2 ? true : false; |
9362a03b | 1325 | |
9795c594 | 1326 | /* Check type and rank. */ |
e7333b69 | 1327 | if (type_must_agree) |
9795c594 | 1328 | { |
0ce0e6e8 JW |
1329 | if (!compare_type_characteristics (s1, s2) |
1330 | || !compare_type_characteristics (s2, s1)) | |
e7333b69 JW |
1331 | { |
1332 | snprintf (errmsg, err_len, "Type mismatch in argument '%s' (%s/%s)", | |
f61e54e5 ME |
1333 | s1->name, gfc_dummy_typename (&s1->ts), |
1334 | gfc_dummy_typename (&s2->ts)); | |
e7333b69 JW |
1335 | return false; |
1336 | } | |
1337 | if (!compare_rank (s1, s2)) | |
1338 | { | |
1339 | snprintf (errmsg, err_len, "Rank mismatch in argument '%s' (%i/%i)", | |
1340 | s1->name, symbol_rank (s1), symbol_rank (s2)); | |
1341 | return false; | |
1342 | } | |
9795c594 JW |
1343 | } |
1344 | ||
1345 | /* Check INTENT. */ | |
1346 | if (s1->attr.intent != s2->attr.intent) | |
1347 | { | |
1348 | snprintf (errmsg, err_len, "INTENT mismatch in argument '%s'", | |
1349 | s1->name); | |
524af0d6 | 1350 | return false; |
9795c594 JW |
1351 | } |
1352 | ||
1353 | /* Check OPTIONAL attribute. */ | |
1354 | if (s1->attr.optional != s2->attr.optional) | |
1355 | { | |
1356 | snprintf (errmsg, err_len, "OPTIONAL mismatch in argument '%s'", | |
1357 | s1->name); | |
524af0d6 | 1358 | return false; |
9795c594 JW |
1359 | } |
1360 | ||
1361 | /* Check ALLOCATABLE attribute. */ | |
1362 | if (s1->attr.allocatable != s2->attr.allocatable) | |
1363 | { | |
1364 | snprintf (errmsg, err_len, "ALLOCATABLE mismatch in argument '%s'", | |
1365 | s1->name); | |
524af0d6 | 1366 | return false; |
9795c594 JW |
1367 | } |
1368 | ||
1369 | /* Check POINTER attribute. */ | |
1370 | if (s1->attr.pointer != s2->attr.pointer) | |
1371 | { | |
1372 | snprintf (errmsg, err_len, "POINTER mismatch in argument '%s'", | |
1373 | s1->name); | |
524af0d6 | 1374 | return false; |
9795c594 JW |
1375 | } |
1376 | ||
1377 | /* Check TARGET attribute. */ | |
1378 | if (s1->attr.target != s2->attr.target) | |
1379 | { | |
1380 | snprintf (errmsg, err_len, "TARGET mismatch in argument '%s'", | |
1381 | s1->name); | |
524af0d6 | 1382 | return false; |
9795c594 JW |
1383 | } |
1384 | ||
688974a3 JW |
1385 | /* Check ASYNCHRONOUS attribute. */ |
1386 | if (s1->attr.asynchronous != s2->attr.asynchronous) | |
1387 | { | |
1388 | snprintf (errmsg, err_len, "ASYNCHRONOUS mismatch in argument '%s'", | |
1389 | s1->name); | |
1390 | return false; | |
1391 | } | |
1392 | ||
1393 | /* Check CONTIGUOUS attribute. */ | |
1394 | if (s1->attr.contiguous != s2->attr.contiguous) | |
1395 | { | |
1396 | snprintf (errmsg, err_len, "CONTIGUOUS mismatch in argument '%s'", | |
1397 | s1->name); | |
1398 | return false; | |
1399 | } | |
1400 | ||
1401 | /* Check VALUE attribute. */ | |
1402 | if (s1->attr.value != s2->attr.value) | |
1403 | { | |
1404 | snprintf (errmsg, err_len, "VALUE mismatch in argument '%s'", | |
1405 | s1->name); | |
1406 | return false; | |
1407 | } | |
1408 | ||
1409 | /* Check VOLATILE attribute. */ | |
1410 | if (s1->attr.volatile_ != s2->attr.volatile_) | |
1411 | { | |
1412 | snprintf (errmsg, err_len, "VOLATILE mismatch in argument '%s'", | |
1413 | s1->name); | |
1414 | return false; | |
1415 | } | |
9795c594 | 1416 | |
f2f8171f JW |
1417 | /* Check interface of dummy procedures. */ |
1418 | if (s1->attr.flavor == FL_PROCEDURE) | |
1419 | { | |
1420 | char err[200]; | |
1421 | if (!gfc_compare_interfaces (s1, s2, s2->name, 0, 1, err, sizeof(err), | |
1422 | NULL, NULL)) | |
1423 | { | |
1424 | snprintf (errmsg, err_len, "Interface mismatch in dummy procedure " | |
1425 | "'%s': %s", s1->name, err); | |
524af0d6 | 1426 | return false; |
f2f8171f JW |
1427 | } |
1428 | } | |
1429 | ||
9795c594 JW |
1430 | /* Check string length. */ |
1431 | if (s1->ts.type == BT_CHARACTER | |
1432 | && s1->ts.u.cl && s1->ts.u.cl->length | |
1433 | && s2->ts.u.cl && s2->ts.u.cl->length) | |
1434 | { | |
1435 | int compval = gfc_dep_compare_expr (s1->ts.u.cl->length, | |
1436 | s2->ts.u.cl->length); | |
1437 | switch (compval) | |
1438 | { | |
1439 | case -1: | |
1440 | case 1: | |
1441 | case -3: | |
1442 | snprintf (errmsg, err_len, "Character length mismatch " | |
1443 | "in argument '%s'", s1->name); | |
524af0d6 | 1444 | return false; |
9795c594 JW |
1445 | |
1446 | case -2: | |
1447 | /* FIXME: Implement a warning for this case. | |
db30e21c | 1448 | gfc_warning (0, "Possible character length mismatch in argument %qs", |
9795c594 JW |
1449 | s1->name);*/ |
1450 | break; | |
1451 | ||
1452 | case 0: | |
1453 | break; | |
1454 | ||
1455 | default: | |
1456 | gfc_internal_error ("check_dummy_characteristics: Unexpected result " | |
1457 | "%i of gfc_dep_compare_expr", compval); | |
1458 | break; | |
1459 | } | |
1460 | } | |
1461 | ||
1462 | /* Check array shape. */ | |
1463 | if (s1->as && s2->as) | |
1464 | { | |
97f26732 JW |
1465 | int i, compval; |
1466 | gfc_expr *shape1, *shape2; | |
1467 | ||
9795c594 JW |
1468 | if (s1->as->type != s2->as->type) |
1469 | { | |
1470 | snprintf (errmsg, err_len, "Shape mismatch in argument '%s'", | |
1471 | s1->name); | |
524af0d6 | 1472 | return false; |
9795c594 | 1473 | } |
97f26732 | 1474 | |
b25affbd TB |
1475 | if (s1->as->corank != s2->as->corank) |
1476 | { | |
1477 | snprintf (errmsg, err_len, "Corank mismatch in argument '%s' (%i/%i)", | |
1478 | s1->name, s1->as->corank, s2->as->corank); | |
1479 | return false; | |
1480 | } | |
1481 | ||
97f26732 | 1482 | if (s1->as->type == AS_EXPLICIT) |
47da0bf6 | 1483 | for (i = 0; i < s1->as->rank + MAX (0, s1->as->corank-1); i++) |
97f26732 JW |
1484 | { |
1485 | shape1 = gfc_subtract (gfc_copy_expr (s1->as->upper[i]), | |
1486 | gfc_copy_expr (s1->as->lower[i])); | |
1487 | shape2 = gfc_subtract (gfc_copy_expr (s2->as->upper[i]), | |
1488 | gfc_copy_expr (s2->as->lower[i])); | |
1489 | compval = gfc_dep_compare_expr (shape1, shape2); | |
1490 | gfc_free_expr (shape1); | |
1491 | gfc_free_expr (shape2); | |
1492 | switch (compval) | |
1493 | { | |
1494 | case -1: | |
1495 | case 1: | |
1496 | case -3: | |
b25affbd TB |
1497 | if (i < s1->as->rank) |
1498 | snprintf (errmsg, err_len, "Shape mismatch in dimension %i of" | |
1499 | " argument '%s'", i + 1, s1->name); | |
1500 | else | |
1501 | snprintf (errmsg, err_len, "Shape mismatch in codimension %i " | |
1502 | "of argument '%s'", i - s1->as->rank + 1, s1->name); | |
524af0d6 | 1503 | return false; |
97f26732 JW |
1504 | |
1505 | case -2: | |
1506 | /* FIXME: Implement a warning for this case. | |
db30e21c | 1507 | gfc_warning (0, "Possible shape mismatch in argument %qs", |
97f26732 JW |
1508 | s1->name);*/ |
1509 | break; | |
1510 | ||
1511 | case 0: | |
1512 | break; | |
1513 | ||
1514 | default: | |
1515 | gfc_internal_error ("check_dummy_characteristics: Unexpected " | |
1516 | "result %i of gfc_dep_compare_expr", | |
1517 | compval); | |
1518 | break; | |
1519 | } | |
1520 | } | |
9795c594 | 1521 | } |
8b704316 | 1522 | |
524af0d6 | 1523 | return true; |
9795c594 JW |
1524 | } |
1525 | ||
1526 | ||
edc802c7 JW |
1527 | /* Check if the characteristics of two function results match, |
1528 | cf. F08:12.3.3. */ | |
1529 | ||
4668d6f9 PT |
1530 | bool |
1531 | gfc_check_result_characteristics (gfc_symbol *s1, gfc_symbol *s2, | |
edc802c7 JW |
1532 | char *errmsg, int err_len) |
1533 | { | |
1534 | gfc_symbol *r1, *r2; | |
1535 | ||
82b541a1 JW |
1536 | if (s1->ts.interface && s1->ts.interface->result) |
1537 | r1 = s1->ts.interface->result; | |
1538 | else | |
1539 | r1 = s1->result ? s1->result : s1; | |
1540 | ||
1541 | if (s2->ts.interface && s2->ts.interface->result) | |
1542 | r2 = s2->ts.interface->result; | |
1543 | else | |
1544 | r2 = s2->result ? s2->result : s2; | |
edc802c7 JW |
1545 | |
1546 | if (r1->ts.type == BT_UNKNOWN) | |
524af0d6 | 1547 | return true; |
edc802c7 JW |
1548 | |
1549 | /* Check type and rank. */ | |
0ce0e6e8 | 1550 | if (!compare_type_characteristics (r1, r2)) |
edc802c7 | 1551 | { |
e7333b69 JW |
1552 | snprintf (errmsg, err_len, "Type mismatch in function result (%s/%s)", |
1553 | gfc_typename (&r1->ts), gfc_typename (&r2->ts)); | |
1554 | return false; | |
1555 | } | |
1556 | if (!compare_rank (r1, r2)) | |
1557 | { | |
1558 | snprintf (errmsg, err_len, "Rank mismatch in function result (%i/%i)", | |
1559 | symbol_rank (r1), symbol_rank (r2)); | |
524af0d6 | 1560 | return false; |
edc802c7 JW |
1561 | } |
1562 | ||
1563 | /* Check ALLOCATABLE attribute. */ | |
1564 | if (r1->attr.allocatable != r2->attr.allocatable) | |
1565 | { | |
1566 | snprintf (errmsg, err_len, "ALLOCATABLE attribute mismatch in " | |
1567 | "function result"); | |
524af0d6 | 1568 | return false; |
edc802c7 JW |
1569 | } |
1570 | ||
1571 | /* Check POINTER attribute. */ | |
1572 | if (r1->attr.pointer != r2->attr.pointer) | |
1573 | { | |
1574 | snprintf (errmsg, err_len, "POINTER attribute mismatch in " | |
1575 | "function result"); | |
524af0d6 | 1576 | return false; |
edc802c7 JW |
1577 | } |
1578 | ||
1579 | /* Check CONTIGUOUS attribute. */ | |
1580 | if (r1->attr.contiguous != r2->attr.contiguous) | |
1581 | { | |
1582 | snprintf (errmsg, err_len, "CONTIGUOUS attribute mismatch in " | |
1583 | "function result"); | |
524af0d6 | 1584 | return false; |
edc802c7 JW |
1585 | } |
1586 | ||
1587 | /* Check PROCEDURE POINTER attribute. */ | |
1588 | if (r1 != s1 && r1->attr.proc_pointer != r2->attr.proc_pointer) | |
1589 | { | |
1590 | snprintf (errmsg, err_len, "PROCEDURE POINTER mismatch in " | |
1591 | "function result"); | |
524af0d6 | 1592 | return false; |
edc802c7 JW |
1593 | } |
1594 | ||
1595 | /* Check string length. */ | |
1596 | if (r1->ts.type == BT_CHARACTER && r1->ts.u.cl && r2->ts.u.cl) | |
1597 | { | |
1598 | if (r1->ts.deferred != r2->ts.deferred) | |
1599 | { | |
1600 | snprintf (errmsg, err_len, "Character length mismatch " | |
1601 | "in function result"); | |
524af0d6 | 1602 | return false; |
edc802c7 JW |
1603 | } |
1604 | ||
96486998 | 1605 | if (r1->ts.u.cl->length && r2->ts.u.cl->length) |
edc802c7 JW |
1606 | { |
1607 | int compval = gfc_dep_compare_expr (r1->ts.u.cl->length, | |
1608 | r2->ts.u.cl->length); | |
1609 | switch (compval) | |
1610 | { | |
1611 | case -1: | |
1612 | case 1: | |
1613 | case -3: | |
1614 | snprintf (errmsg, err_len, "Character length mismatch " | |
1615 | "in function result"); | |
524af0d6 | 1616 | return false; |
edc802c7 JW |
1617 | |
1618 | case -2: | |
1619 | /* FIXME: Implement a warning for this case. | |
1620 | snprintf (errmsg, err_len, "Possible character length mismatch " | |
1621 | "in function result");*/ | |
1622 | break; | |
1623 | ||
1624 | case 0: | |
1625 | break; | |
1626 | ||
1627 | default: | |
1628 | gfc_internal_error ("check_result_characteristics (1): Unexpected " | |
1629 | "result %i of gfc_dep_compare_expr", compval); | |
1630 | break; | |
1631 | } | |
1632 | } | |
1633 | } | |
1634 | ||
1635 | /* Check array shape. */ | |
1636 | if (!r1->attr.allocatable && !r1->attr.pointer && r1->as && r2->as) | |
1637 | { | |
1638 | int i, compval; | |
1639 | gfc_expr *shape1, *shape2; | |
1640 | ||
1641 | if (r1->as->type != r2->as->type) | |
1642 | { | |
1643 | snprintf (errmsg, err_len, "Shape mismatch in function result"); | |
524af0d6 | 1644 | return false; |
edc802c7 JW |
1645 | } |
1646 | ||
1647 | if (r1->as->type == AS_EXPLICIT) | |
1648 | for (i = 0; i < r1->as->rank + r1->as->corank; i++) | |
1649 | { | |
1650 | shape1 = gfc_subtract (gfc_copy_expr (r1->as->upper[i]), | |
1651 | gfc_copy_expr (r1->as->lower[i])); | |
1652 | shape2 = gfc_subtract (gfc_copy_expr (r2->as->upper[i]), | |
1653 | gfc_copy_expr (r2->as->lower[i])); | |
1654 | compval = gfc_dep_compare_expr (shape1, shape2); | |
1655 | gfc_free_expr (shape1); | |
1656 | gfc_free_expr (shape2); | |
1657 | switch (compval) | |
1658 | { | |
1659 | case -1: | |
1660 | case 1: | |
1661 | case -3: | |
1662 | snprintf (errmsg, err_len, "Shape mismatch in dimension %i of " | |
1663 | "function result", i + 1); | |
524af0d6 | 1664 | return false; |
edc802c7 JW |
1665 | |
1666 | case -2: | |
1667 | /* FIXME: Implement a warning for this case. | |
db30e21c | 1668 | gfc_warning (0, "Possible shape mismatch in return value");*/ |
edc802c7 JW |
1669 | break; |
1670 | ||
1671 | case 0: | |
1672 | break; | |
1673 | ||
1674 | default: | |
1675 | gfc_internal_error ("check_result_characteristics (2): " | |
1676 | "Unexpected result %i of " | |
1677 | "gfc_dep_compare_expr", compval); | |
1678 | break; | |
1679 | } | |
1680 | } | |
1681 | } | |
1682 | ||
524af0d6 | 1683 | return true; |
edc802c7 JW |
1684 | } |
1685 | ||
1686 | ||
6de9cd9a | 1687 | /* 'Compare' two formal interfaces associated with a pair of symbols. |
f3e1097b | 1688 | We return true if there exists an actual argument list that |
8ad15a0a | 1689 | would be ambiguous between the two interfaces, zero otherwise. |
58c1ae36 | 1690 | 'strict_flag' specifies whether all the characteristics are |
6f3ab30d JW |
1691 | required to match, which is not the case for ambiguity checks. |
1692 | 'p1' and 'p2' are the PASS arguments of both procedures (if applicable). */ | |
6de9cd9a | 1693 | |
f3e1097b | 1694 | bool |
889dc035 | 1695 | gfc_compare_interfaces (gfc_symbol *s1, gfc_symbol *s2, const char *name2, |
58c1ae36 | 1696 | int generic_flag, int strict_flag, |
6f3ab30d JW |
1697 | char *errmsg, int err_len, |
1698 | const char *p1, const char *p2) | |
6de9cd9a DN |
1699 | { |
1700 | gfc_formal_arglist *f1, *f2; | |
1701 | ||
0175478d JD |
1702 | gcc_assert (name2 != NULL); |
1703 | ||
9b63f282 JW |
1704 | if (s1->attr.function && (s2->attr.subroutine |
1705 | || (!s2->attr.function && s2->ts.type == BT_UNKNOWN | |
889dc035 | 1706 | && gfc_get_default_type (name2, s2->ns)->type == BT_UNKNOWN))) |
8ad15a0a JW |
1707 | { |
1708 | if (errmsg != NULL) | |
889dc035 | 1709 | snprintf (errmsg, err_len, "'%s' is not a function", name2); |
f3e1097b | 1710 | return false; |
8ad15a0a JW |
1711 | } |
1712 | ||
1713 | if (s1->attr.subroutine && s2->attr.function) | |
1714 | { | |
1715 | if (errmsg != NULL) | |
889dc035 | 1716 | snprintf (errmsg, err_len, "'%s' is not a subroutine", name2); |
f3e1097b | 1717 | return false; |
8ad15a0a | 1718 | } |
3afadac3 | 1719 | |
58c1ae36 JW |
1720 | /* Do strict checks on all characteristics |
1721 | (for dummy procedures and procedure pointer assignments). */ | |
1722 | if (!generic_flag && strict_flag) | |
6cc309c9 | 1723 | { |
58c1ae36 | 1724 | if (s1->attr.function && s2->attr.function) |
8ad15a0a | 1725 | { |
edc802c7 | 1726 | /* If both are functions, check result characteristics. */ |
4668d6f9 PT |
1727 | if (!gfc_check_result_characteristics (s1, s2, errmsg, err_len) |
1728 | || !gfc_check_result_characteristics (s2, s1, errmsg, err_len)) | |
f3e1097b | 1729 | return false; |
58c1ae36 JW |
1730 | } |
1731 | ||
1732 | if (s1->attr.pure && !s2->attr.pure) | |
1733 | { | |
1734 | snprintf (errmsg, err_len, "Mismatch in PURE attribute"); | |
f3e1097b | 1735 | return false; |
58c1ae36 JW |
1736 | } |
1737 | if (s1->attr.elemental && !s2->attr.elemental) | |
1738 | { | |
1739 | snprintf (errmsg, err_len, "Mismatch in ELEMENTAL attribute"); | |
f3e1097b | 1740 | return false; |
8ad15a0a | 1741 | } |
6cc309c9 | 1742 | } |
26033479 | 1743 | |
8ad15a0a JW |
1744 | if (s1->attr.if_source == IFSRC_UNKNOWN |
1745 | || s2->attr.if_source == IFSRC_UNKNOWN) | |
f3e1097b | 1746 | return true; |
26033479 | 1747 | |
4cbc9039 JW |
1748 | f1 = gfc_sym_get_dummy_args (s1); |
1749 | f2 = gfc_sym_get_dummy_args (s2); | |
26033479 | 1750 | |
bd845c14 | 1751 | /* Special case: No arguments. */ |
c73b6478 | 1752 | if (f1 == NULL && f2 == NULL) |
f3e1097b | 1753 | return true; |
6cc309c9 | 1754 | |
c73b6478 | 1755 | if (generic_flag) |
6cc309c9 | 1756 | { |
6f3ab30d JW |
1757 | if (count_types_test (f1, f2, p1, p2) |
1758 | || count_types_test (f2, f1, p2, p1)) | |
f3e1097b | 1759 | return false; |
bd845c14 SK |
1760 | |
1761 | /* Special case: alternate returns. If both f1->sym and f2->sym are | |
e4e659b9 JW |
1762 | NULL, then the leading formal arguments are alternate returns. |
1763 | The previous conditional should catch argument lists with | |
bd845c14 SK |
1764 | different number of argument. */ |
1765 | if (f1 && f1->sym == NULL && f2 && f2->sym == NULL) | |
f3e1097b | 1766 | return true; |
bd845c14 | 1767 | |
6f3ab30d JW |
1768 | if (generic_correspondence (f1, f2, p1, p2) |
1769 | || generic_correspondence (f2, f1, p2, p1)) | |
f3e1097b | 1770 | return false; |
6cc309c9 | 1771 | } |
c73b6478 | 1772 | else |
8ad15a0a JW |
1773 | /* Perform the abbreviated correspondence test for operators (the |
1774 | arguments cannot be optional and are always ordered correctly). | |
1775 | This is also done when comparing interfaces for dummy procedures and in | |
1776 | procedure pointer assignments. */ | |
1777 | ||
f76c4d97 | 1778 | for (; f1 || f2; f1 = f1->next, f2 = f2->next) |
8ad15a0a JW |
1779 | { |
1780 | /* Check existence. */ | |
8ad15a0a JW |
1781 | if (f1 == NULL || f2 == NULL) |
1782 | { | |
1783 | if (errmsg != NULL) | |
1784 | snprintf (errmsg, err_len, "'%s' has the wrong number of " | |
889dc035 | 1785 | "arguments", name2); |
f3e1097b | 1786 | return false; |
8ad15a0a JW |
1787 | } |
1788 | ||
58c1ae36 | 1789 | if (strict_flag) |
8ad15a0a | 1790 | { |
9795c594 | 1791 | /* Check all characteristics. */ |
4668d6f9 | 1792 | if (!gfc_check_dummy_characteristics (f1->sym, f2->sym, true, |
524af0d6 | 1793 | errmsg, err_len)) |
f3e1097b | 1794 | return false; |
9795c594 | 1795 | } |
e7333b69 | 1796 | else |
9795c594 | 1797 | { |
d50cd259 | 1798 | /* Operators: Only check type and rank of arguments. */ |
e7333b69 JW |
1799 | if (!compare_type (f2->sym, f1->sym)) |
1800 | { | |
1801 | if (errmsg != NULL) | |
1802 | snprintf (errmsg, err_len, "Type mismatch in argument '%s' " | |
1803 | "(%s/%s)", f1->sym->name, | |
1804 | gfc_typename (&f1->sym->ts), | |
1805 | gfc_typename (&f2->sym->ts)); | |
f3e1097b | 1806 | return false; |
e7333b69 JW |
1807 | } |
1808 | if (!compare_rank (f2->sym, f1->sym)) | |
1809 | { | |
1810 | if (errmsg != NULL) | |
e0b9e5f9 TK |
1811 | snprintf (errmsg, err_len, "Rank mismatch in argument " |
1812 | "'%s' (%i/%i)", f1->sym->name, | |
1813 | symbol_rank (f1->sym), symbol_rank (f2->sym)); | |
f3e1097b | 1814 | return false; |
e7333b69 | 1815 | } |
d50cd259 JW |
1816 | if ((gfc_option.allow_std & GFC_STD_F2008) |
1817 | && (compare_ptr_alloc(f1->sym, f2->sym) | |
1818 | || compare_ptr_alloc(f2->sym, f1->sym))) | |
1819 | { | |
1820 | if (errmsg != NULL) | |
1821 | snprintf (errmsg, err_len, "Mismatching POINTER/ALLOCATABLE " | |
1822 | "attribute in argument '%s' ", f1->sym->name); | |
1823 | return false; | |
1824 | } | |
8ad15a0a | 1825 | } |
8ad15a0a JW |
1826 | } |
1827 | ||
f3e1097b | 1828 | return true; |
6cc309c9 JD |
1829 | } |
1830 | ||
1831 | ||
6de9cd9a | 1832 | /* Given a pointer to an interface pointer, remove duplicate |
284d58f1 | 1833 | interfaces and make sure that all symbols are either functions |
f3e1097b | 1834 | or subroutines, and all of the same kind. Returns true if |
284d58f1 | 1835 | something goes wrong. */ |
6de9cd9a | 1836 | |
f3e1097b | 1837 | static bool |
b251af97 | 1838 | check_interface0 (gfc_interface *p, const char *interface_name) |
6de9cd9a DN |
1839 | { |
1840 | gfc_interface *psave, *q, *qlast; | |
1841 | ||
1842 | psave = p; | |
6de9cd9a | 1843 | for (; p; p = p->next) |
284d58f1 DF |
1844 | { |
1845 | /* Make sure all symbols in the interface have been defined as | |
1846 | functions or subroutines. */ | |
c3f34952 TB |
1847 | if (((!p->sym->attr.function && !p->sym->attr.subroutine) |
1848 | || !p->sym->attr.if_source) | |
f6288c24 | 1849 | && !gfc_fl_struct (p->sym->attr.flavor)) |
284d58f1 | 1850 | { |
bcc478b9 BRF |
1851 | const char *guessed |
1852 | = gfc_lookup_function_fuzzy (p->sym->name, p->sym->ns->sym_root); | |
1853 | ||
284d58f1 | 1854 | if (p->sym->attr.external) |
bcc478b9 BRF |
1855 | if (guessed) |
1856 | gfc_error ("Procedure %qs in %s at %L has no explicit interface" | |
1857 | "; did you mean %qs?", | |
1858 | p->sym->name, interface_name, &p->sym->declared_at, | |
1859 | guessed); | |
1860 | else | |
1861 | gfc_error ("Procedure %qs in %s at %L has no explicit interface", | |
1862 | p->sym->name, interface_name, &p->sym->declared_at); | |
284d58f1 | 1863 | else |
bcc478b9 BRF |
1864 | if (guessed) |
1865 | gfc_error ("Procedure %qs in %s at %L is neither function nor " | |
1866 | "subroutine; did you mean %qs?", p->sym->name, | |
1867 | interface_name, &p->sym->declared_at, guessed); | |
1868 | else | |
1869 | gfc_error ("Procedure %qs in %s at %L is neither function nor " | |
1870 | "subroutine", p->sym->name, interface_name, | |
1871 | &p->sym->declared_at); | |
f3e1097b | 1872 | return true; |
284d58f1 DF |
1873 | } |
1874 | ||
1875 | /* Verify that procedures are either all SUBROUTINEs or all FUNCTIONs. */ | |
c3f34952 | 1876 | if ((psave->sym->attr.function && !p->sym->attr.function |
f6288c24 | 1877 | && !gfc_fl_struct (p->sym->attr.flavor)) |
284d58f1 DF |
1878 | || (psave->sym->attr.subroutine && !p->sym->attr.subroutine)) |
1879 | { | |
f6288c24 | 1880 | if (!gfc_fl_struct (p->sym->attr.flavor)) |
c3f34952 TB |
1881 | gfc_error ("In %s at %L procedures must be either all SUBROUTINEs" |
1882 | " or all FUNCTIONs", interface_name, | |
1883 | &p->sym->declared_at); | |
f6288c24 | 1884 | else if (p->sym->attr.flavor == FL_DERIVED) |
c3f34952 TB |
1885 | gfc_error ("In %s at %L procedures must be all FUNCTIONs as the " |
1886 | "generic name is also the name of a derived type", | |
1887 | interface_name, &p->sym->declared_at); | |
f3e1097b | 1888 | return true; |
284d58f1 | 1889 | } |
a300121e | 1890 | |
d2c5dbf2 | 1891 | /* F2003, C1207. F2008, C1207. */ |
a300121e | 1892 | if (p->sym->attr.proc == PROC_INTERNAL |
524af0d6 | 1893 | && !gfc_notify_std (GFC_STD_F2008, "Internal procedure " |
a4d9b221 | 1894 | "%qs in %s at %L", p->sym->name, |
524af0d6 | 1895 | interface_name, &p->sym->declared_at)) |
f3e1097b | 1896 | return true; |
284d58f1 | 1897 | } |
6de9cd9a DN |
1898 | p = psave; |
1899 | ||
1900 | /* Remove duplicate interfaces in this interface list. */ | |
1901 | for (; p; p = p->next) | |
1902 | { | |
1903 | qlast = p; | |
1904 | ||
1905 | for (q = p->next; q;) | |
1906 | { | |
1907 | if (p->sym != q->sym) | |
1908 | { | |
1909 | qlast = q; | |
1910 | q = q->next; | |
6de9cd9a DN |
1911 | } |
1912 | else | |
1913 | { | |
66e4ab31 | 1914 | /* Duplicate interface. */ |
6de9cd9a | 1915 | qlast->next = q->next; |
cede9502 | 1916 | free (q); |
6de9cd9a DN |
1917 | q = qlast->next; |
1918 | } | |
1919 | } | |
1920 | } | |
1921 | ||
f3e1097b | 1922 | return false; |
6de9cd9a DN |
1923 | } |
1924 | ||
1925 | ||
1926 | /* Check lists of interfaces to make sure that no two interfaces are | |
66e4ab31 | 1927 | ambiguous. Duplicate interfaces (from the same symbol) are OK here. */ |
6de9cd9a | 1928 | |
f3e1097b | 1929 | static bool |
b251af97 | 1930 | check_interface1 (gfc_interface *p, gfc_interface *q0, |
993ef28f | 1931 | int generic_flag, const char *interface_name, |
26f2ca2b | 1932 | bool referenced) |
6de9cd9a | 1933 | { |
b251af97 | 1934 | gfc_interface *q; |
6de9cd9a | 1935 | for (; p; p = p->next) |
991f3b12 | 1936 | for (q = q0; q; q = q->next) |
6de9cd9a DN |
1937 | { |
1938 | if (p->sym == q->sym) | |
66e4ab31 | 1939 | continue; /* Duplicates OK here. */ |
6de9cd9a | 1940 | |
312ae8f4 | 1941 | if (p->sym->name == q->sym->name && p->sym->module == q->sym->module) |
6de9cd9a DN |
1942 | continue; |
1943 | ||
f6288c24 FR |
1944 | if (!gfc_fl_struct (p->sym->attr.flavor) |
1945 | && !gfc_fl_struct (q->sym->attr.flavor) | |
c3f34952 | 1946 | && gfc_compare_interfaces (p->sym, q->sym, q->sym->name, |
6f3ab30d | 1947 | generic_flag, 0, NULL, 0, NULL, NULL)) |
6de9cd9a | 1948 | { |
993ef28f | 1949 | if (referenced) |
bd845c14 SK |
1950 | gfc_error ("Ambiguous interfaces in %s for %qs at %L " |
1951 | "and %qs at %L", interface_name, | |
1952 | q->sym->name, &q->sym->declared_at, | |
1953 | p->sym->name, &p->sym->declared_at); | |
ae7c61de | 1954 | else if (!p->sym->attr.use_assoc && q->sym->attr.use_assoc) |
bd845c14 SK |
1955 | gfc_warning (0, "Ambiguous interfaces in %s for %qs at %L " |
1956 | "and %qs at %L", interface_name, | |
1957 | q->sym->name, &q->sym->declared_at, | |
1958 | p->sym->name, &p->sym->declared_at); | |
ae7c61de | 1959 | else |
db30e21c | 1960 | gfc_warning (0, "Although not referenced, %qs has ambiguous " |
ae7c61de | 1961 | "interfaces at %L", interface_name, &p->where); |
f3e1097b | 1962 | return true; |
6de9cd9a DN |
1963 | } |
1964 | } | |
f3e1097b | 1965 | return false; |
6de9cd9a DN |
1966 | } |
1967 | ||
1968 | ||
1969 | /* Check the generic and operator interfaces of symbols to make sure | |
1970 | that none of the interfaces conflict. The check has to be done | |
1971 | after all of the symbols are actually loaded. */ | |
1972 | ||
1973 | static void | |
b251af97 | 1974 | check_sym_interfaces (gfc_symbol *sym) |
6de9cd9a | 1975 | { |
439d2350 | 1976 | char interface_name[GFC_MAX_SYMBOL_LEN + sizeof("generic interface ''")]; |
71f77fd7 | 1977 | gfc_interface *p; |
6de9cd9a DN |
1978 | |
1979 | if (sym->ns != gfc_current_ns) | |
1980 | return; | |
1981 | ||
1982 | if (sym->generic != NULL) | |
1983 | { | |
1984 | sprintf (interface_name, "generic interface '%s'", sym->name); | |
1985 | if (check_interface0 (sym->generic, interface_name)) | |
1986 | return; | |
1987 | ||
71f77fd7 PT |
1988 | for (p = sym->generic; p; p = p->next) |
1989 | { | |
abf86978 | 1990 | if (p->sym->attr.mod_proc |
4668d6f9 | 1991 | && !p->sym->attr.module_procedure |
abf86978 TB |
1992 | && (p->sym->attr.if_source != IFSRC_DECL |
1993 | || p->sym->attr.procedure)) | |
71f77fd7 | 1994 | { |
c4100eae | 1995 | gfc_error ("%qs at %L is not a module procedure", |
e9f63ace | 1996 | p->sym->name, &p->where); |
71f77fd7 PT |
1997 | return; |
1998 | } | |
1999 | } | |
2000 | ||
4c256e34 | 2001 | /* Originally, this test was applied to host interfaces too; |
993ef28f PT |
2002 | this is incorrect since host associated symbols, from any |
2003 | source, cannot be ambiguous with local symbols. */ | |
ae7c61de JW |
2004 | check_interface1 (sym->generic, sym->generic, 1, interface_name, |
2005 | sym->attr.referenced || !sym->attr.use_assoc); | |
6de9cd9a DN |
2006 | } |
2007 | } | |
2008 | ||
2009 | ||
2010 | static void | |
b251af97 | 2011 | check_uop_interfaces (gfc_user_op *uop) |
6de9cd9a | 2012 | { |
439d2350 | 2013 | char interface_name[GFC_MAX_SYMBOL_LEN + sizeof("operator interface ''")]; |
6de9cd9a DN |
2014 | gfc_user_op *uop2; |
2015 | gfc_namespace *ns; | |
2016 | ||
2017 | sprintf (interface_name, "operator interface '%s'", uop->name); | |
a1ee985f | 2018 | if (check_interface0 (uop->op, interface_name)) |
6de9cd9a DN |
2019 | return; |
2020 | ||
2021 | for (ns = gfc_current_ns; ns; ns = ns->parent) | |
2022 | { | |
2023 | uop2 = gfc_find_uop (uop->name, ns); | |
2024 | if (uop2 == NULL) | |
2025 | continue; | |
2026 | ||
a1ee985f | 2027 | check_interface1 (uop->op, uop2->op, 0, |
26f2ca2b | 2028 | interface_name, true); |
6de9cd9a DN |
2029 | } |
2030 | } | |
2031 | ||
fb03a37e TK |
2032 | /* Given an intrinsic op, return an equivalent op if one exists, |
2033 | or INTRINSIC_NONE otherwise. */ | |
2034 | ||
2035 | gfc_intrinsic_op | |
2036 | gfc_equivalent_op (gfc_intrinsic_op op) | |
2037 | { | |
2038 | switch(op) | |
2039 | { | |
2040 | case INTRINSIC_EQ: | |
2041 | return INTRINSIC_EQ_OS; | |
2042 | ||
2043 | case INTRINSIC_EQ_OS: | |
2044 | return INTRINSIC_EQ; | |
2045 | ||
2046 | case INTRINSIC_NE: | |
2047 | return INTRINSIC_NE_OS; | |
2048 | ||
2049 | case INTRINSIC_NE_OS: | |
2050 | return INTRINSIC_NE; | |
2051 | ||
2052 | case INTRINSIC_GT: | |
2053 | return INTRINSIC_GT_OS; | |
2054 | ||
2055 | case INTRINSIC_GT_OS: | |
2056 | return INTRINSIC_GT; | |
2057 | ||
2058 | case INTRINSIC_GE: | |
2059 | return INTRINSIC_GE_OS; | |
2060 | ||
2061 | case INTRINSIC_GE_OS: | |
2062 | return INTRINSIC_GE; | |
2063 | ||
2064 | case INTRINSIC_LT: | |
2065 | return INTRINSIC_LT_OS; | |
2066 | ||
2067 | case INTRINSIC_LT_OS: | |
2068 | return INTRINSIC_LT; | |
2069 | ||
2070 | case INTRINSIC_LE: | |
2071 | return INTRINSIC_LE_OS; | |
2072 | ||
2073 | case INTRINSIC_LE_OS: | |
2074 | return INTRINSIC_LE; | |
2075 | ||
2076 | default: | |
2077 | return INTRINSIC_NONE; | |
2078 | } | |
2079 | } | |
6de9cd9a DN |
2080 | |
2081 | /* For the namespace, check generic, user operator and intrinsic | |
2082 | operator interfaces for consistency and to remove duplicate | |
2083 | interfaces. We traverse the whole namespace, counting on the fact | |
2084 | that most symbols will not have generic or operator interfaces. */ | |
2085 | ||
2086 | void | |
b251af97 | 2087 | gfc_check_interfaces (gfc_namespace *ns) |
6de9cd9a DN |
2088 | { |
2089 | gfc_namespace *old_ns, *ns2; | |
439d2350 | 2090 | char interface_name[GFC_MAX_SYMBOL_LEN + sizeof("intrinsic '' operator")]; |
09639a83 | 2091 | int i; |
6de9cd9a DN |
2092 | |
2093 | old_ns = gfc_current_ns; | |
2094 | gfc_current_ns = ns; | |
2095 | ||
2096 | gfc_traverse_ns (ns, check_sym_interfaces); | |
2097 | ||
2098 | gfc_traverse_user_op (ns, check_uop_interfaces); | |
2099 | ||
2100 | for (i = GFC_INTRINSIC_BEGIN; i != GFC_INTRINSIC_END; i++) | |
2101 | { | |
2102 | if (i == INTRINSIC_USER) | |
2103 | continue; | |
2104 | ||
2105 | if (i == INTRINSIC_ASSIGN) | |
2106 | strcpy (interface_name, "intrinsic assignment operator"); | |
2107 | else | |
2108 | sprintf (interface_name, "intrinsic '%s' operator", | |
09639a83 | 2109 | gfc_op2string ((gfc_intrinsic_op) i)); |
6de9cd9a | 2110 | |
a1ee985f | 2111 | if (check_interface0 (ns->op[i], interface_name)) |
6de9cd9a DN |
2112 | continue; |
2113 | ||
94747289 DK |
2114 | if (ns->op[i]) |
2115 | gfc_check_operator_interface (ns->op[i]->sym, (gfc_intrinsic_op) i, | |
2116 | ns->op[i]->where); | |
6de9cd9a | 2117 | |
3bed9dd0 DF |
2118 | for (ns2 = ns; ns2; ns2 = ns2->parent) |
2119 | { | |
fb03a37e | 2120 | gfc_intrinsic_op other_op; |
8b704316 | 2121 | |
a1ee985f | 2122 | if (check_interface1 (ns->op[i], ns2->op[i], 0, |
3bed9dd0 DF |
2123 | interface_name, true)) |
2124 | goto done; | |
2125 | ||
fb03a37e TK |
2126 | /* i should be gfc_intrinsic_op, but has to be int with this cast |
2127 | here for stupid C++ compatibility rules. */ | |
2128 | other_op = gfc_equivalent_op ((gfc_intrinsic_op) i); | |
2129 | if (other_op != INTRINSIC_NONE | |
2130 | && check_interface1 (ns->op[i], ns2->op[other_op], | |
2131 | 0, interface_name, true)) | |
2132 | goto done; | |
3bed9dd0 | 2133 | } |
6de9cd9a DN |
2134 | } |
2135 | ||
3bed9dd0 | 2136 | done: |
6de9cd9a DN |
2137 | gfc_current_ns = old_ns; |
2138 | } | |
2139 | ||
2140 | ||
aa08038d EE |
2141 | /* Given a symbol of a formal argument list and an expression, if the |
2142 | formal argument is allocatable, check that the actual argument is | |
f3e1097b | 2143 | allocatable. Returns true if compatible, zero if not compatible. */ |
aa08038d | 2144 | |
f3e1097b | 2145 | static bool |
b251af97 | 2146 | compare_allocatable (gfc_symbol *formal, gfc_expr *actual) |
aa08038d | 2147 | { |
5ac13b8e JW |
2148 | if (formal->attr.allocatable |
2149 | || (formal->ts.type == BT_CLASS && CLASS_DATA (formal)->attr.allocatable)) | |
aa08038d | 2150 | { |
fec5ce24 JW |
2151 | symbol_attribute attr = gfc_expr_attr (actual); |
2152 | if (actual->ts.type == BT_CLASS && !attr.class_ok) | |
f3e1097b | 2153 | return true; |
fec5ce24 | 2154 | else if (!attr.allocatable) |
f3e1097b | 2155 | return false; |
aa08038d EE |
2156 | } |
2157 | ||
f3e1097b | 2158 | return true; |
aa08038d EE |
2159 | } |
2160 | ||
2161 | ||
6de9cd9a DN |
2162 | /* Given a symbol of a formal argument list and an expression, if the |
2163 | formal argument is a pointer, see if the actual argument is a | |
2164 | pointer. Returns nonzero if compatible, zero if not compatible. */ | |
2165 | ||
2166 | static int | |
b251af97 | 2167 | compare_pointer (gfc_symbol *formal, gfc_expr *actual) |
6de9cd9a DN |
2168 | { |
2169 | symbol_attribute attr; | |
2170 | ||
f18075ff TB |
2171 | if (formal->attr.pointer |
2172 | || (formal->ts.type == BT_CLASS && CLASS_DATA (formal) | |
2173 | && CLASS_DATA (formal)->attr.class_pointer)) | |
6de9cd9a DN |
2174 | { |
2175 | attr = gfc_expr_attr (actual); | |
7d54ef80 TB |
2176 | |
2177 | /* Fortran 2008 allows non-pointer actual arguments. */ | |
2178 | if (!attr.pointer && attr.target && formal->attr.intent == INTENT_IN) | |
2179 | return 2; | |
2180 | ||
6de9cd9a DN |
2181 | if (!attr.pointer) |
2182 | return 0; | |
2183 | } | |
2184 | ||
2185 | return 1; | |
2186 | } | |
2187 | ||
2188 | ||
a516520c PT |
2189 | /* Emit clear error messages for rank mismatch. */ |
2190 | ||
2191 | static void | |
2192 | argument_rank_mismatch (const char *name, locus *where, | |
e0b9e5f9 | 2193 | int rank1, int rank2, locus *where_formal) |
a516520c | 2194 | { |
c62c6622 TB |
2195 | |
2196 | /* TS 29113, C407b. */ | |
e0b9e5f9 TK |
2197 | if (where_formal == NULL) |
2198 | { | |
2199 | if (rank2 == -1) | |
2200 | gfc_error ("The assumed-rank array at %L requires that the dummy " | |
2201 | "argument %qs has assumed-rank", where, name); | |
2202 | else if (rank1 == 0) | |
2203 | gfc_error_opt (0, "Rank mismatch in argument %qs " | |
2204 | "at %L (scalar and rank-%d)", name, where, rank2); | |
2205 | else if (rank2 == 0) | |
2206 | gfc_error_opt (0, "Rank mismatch in argument %qs " | |
2207 | "at %L (rank-%d and scalar)", name, where, rank1); | |
2208 | else | |
2209 | gfc_error_opt (0, "Rank mismatch in argument %qs " | |
2210 | "at %L (rank-%d and rank-%d)", name, where, rank1, | |
2211 | rank2); | |
2212 | } | |
a516520c | 2213 | else |
e0b9e5f9 TK |
2214 | { |
2215 | gcc_assert (rank2 != -1); | |
2216 | if (rank1 == 0) | |
2217 | gfc_error_opt (0, "Rank mismatch between actual argument at %L " | |
2218 | "and actual argument at %L (scalar and rank-%d)", | |
2219 | where, where_formal, rank2); | |
2220 | else if (rank2 == 0) | |
2221 | gfc_error_opt (0, "Rank mismatch between actual argument at %L " | |
2222 | "and actual argument at %L (rank-%d and scalar)", | |
2223 | where, where_formal, rank1); | |
2224 | else | |
2225 | gfc_error_opt (0, "Rank mismatch between actual argument at %L " | |
92e8508e | 2226 | "and actual argument at %L (rank-%d and rank-%d)", where, |
e0b9e5f9 TK |
2227 | where_formal, rank1, rank2); |
2228 | } | |
a516520c PT |
2229 | } |
2230 | ||
2231 | ||
4a4fc7fe TK |
2232 | /* Under certain conditions, a scalar actual argument can be passed |
2233 | to an array dummy argument - see F2018, 15.5.2.4, paragraph 14. | |
2234 | This function returns true for these conditions so that an error | |
2235 | or warning for this can be suppressed later. Always return false | |
2236 | for expressions with rank > 0. */ | |
2237 | ||
2238 | bool | |
2239 | maybe_dummy_array_arg (gfc_expr *e) | |
2240 | { | |
2241 | gfc_symbol *s; | |
2242 | gfc_ref *ref; | |
2243 | bool array_pointer = false; | |
2244 | bool assumed_shape = false; | |
2245 | bool scalar_ref = true; | |
2246 | ||
2247 | if (e->rank > 0) | |
2248 | return false; | |
2249 | ||
2250 | if (e->ts.type == BT_CHARACTER && e->ts.kind == 1) | |
2251 | return true; | |
2252 | ||
2253 | /* If this comes from a constructor, it has been an array element | |
2254 | originally. */ | |
2255 | ||
2256 | if (e->expr_type == EXPR_CONSTANT) | |
2257 | return e->from_constructor; | |
2258 | ||
2259 | if (e->expr_type != EXPR_VARIABLE) | |
2260 | return false; | |
2261 | ||
2262 | s = e->symtree->n.sym; | |
2263 | ||
2264 | if (s->attr.dimension) | |
2265 | { | |
2266 | scalar_ref = false; | |
2267 | array_pointer = s->attr.pointer; | |
2268 | } | |
2269 | ||
2270 | if (s->as && s->as->type == AS_ASSUMED_SHAPE) | |
2271 | assumed_shape = true; | |
2272 | ||
2273 | for (ref=e->ref; ref; ref=ref->next) | |
2274 | { | |
2275 | if (ref->type == REF_COMPONENT) | |
2276 | { | |
2277 | symbol_attribute *attr; | |
2278 | attr = &ref->u.c.component->attr; | |
2279 | if (attr->dimension) | |
2280 | { | |
2281 | array_pointer = attr->pointer; | |
2282 | assumed_shape = false; | |
2283 | scalar_ref = false; | |
2284 | } | |
2285 | else | |
2286 | scalar_ref = true; | |
2287 | } | |
2288 | } | |
2289 | ||
2290 | return !(scalar_ref || array_pointer || assumed_shape); | |
2291 | } | |
2292 | ||
6de9cd9a | 2293 | /* Given a symbol of a formal argument list and an expression, see if |
f3e1097b JW |
2294 | the two are compatible as arguments. Returns true if |
2295 | compatible, false if not compatible. */ | |
6de9cd9a | 2296 | |
f3e1097b | 2297 | static bool |
b251af97 | 2298 | compare_parameter (gfc_symbol *formal, gfc_expr *actual, |
5ad6345e | 2299 | int ranks_must_agree, int is_elemental, locus *where) |
6de9cd9a DN |
2300 | { |
2301 | gfc_ref *ref; | |
975b975b | 2302 | bool rank_check, is_pointer; |
5c0ba546 JW |
2303 | char err[200]; |
2304 | gfc_component *ppc; | |
6de9cd9a | 2305 | |
a8b3b0b6 CR |
2306 | /* If the formal arg has type BT_VOID, it's to one of the iso_c_binding |
2307 | procs c_f_pointer or c_f_procpointer, and we need to accept most | |
2308 | pointers the user could give us. This should allow that. */ | |
2309 | if (formal->ts.type == BT_VOID) | |
f3e1097b | 2310 | return true; |
a8b3b0b6 CR |
2311 | |
2312 | if (formal->ts.type == BT_DERIVED | |
bc21d315 | 2313 | && formal->ts.u.derived && formal->ts.u.derived->ts.is_iso_c |
a8b3b0b6 | 2314 | && actual->ts.type == BT_DERIVED |
bc21d315 | 2315 | && actual->ts.u.derived && actual->ts.u.derived->ts.is_iso_c) |
f3e1097b | 2316 | return true; |
a8b3b0b6 | 2317 | |
7d58b9e7 | 2318 | if (formal->ts.type == BT_CLASS && actual->ts.type == BT_DERIVED) |
e10f52d0 JW |
2319 | /* Make sure the vtab symbol is present when |
2320 | the module variables are generated. */ | |
7d58b9e7 | 2321 | gfc_find_derived_vtab (actual->ts.u.derived); |
e10f52d0 | 2322 | |
6de9cd9a DN |
2323 | if (actual->ts.type == BT_PROCEDURE) |
2324 | { | |
9b63f282 | 2325 | gfc_symbol *act_sym = actual->symtree->n.sym; |
6de9cd9a | 2326 | |
8ad15a0a JW |
2327 | if (formal->attr.flavor != FL_PROCEDURE) |
2328 | { | |
2329 | if (where) | |
2330 | gfc_error ("Invalid procedure argument at %L", &actual->where); | |
f3e1097b | 2331 | return false; |
8ad15a0a | 2332 | } |
6de9cd9a | 2333 | |
889dc035 | 2334 | if (!gfc_compare_interfaces (formal, act_sym, act_sym->name, 0, 1, err, |
6f3ab30d | 2335 | sizeof(err), NULL, NULL)) |
8ad15a0a JW |
2336 | { |
2337 | if (where) | |
e0b9e5f9 | 2338 | gfc_error_opt (0, "Interface mismatch in dummy procedure %qs at %L:" |
2700d0e3 | 2339 | " %s", formal->name, &actual->where, err); |
f3e1097b | 2340 | return false; |
8ad15a0a | 2341 | } |
5ad6345e | 2342 | |
9b63f282 | 2343 | if (formal->attr.function && !act_sym->attr.function) |
03bd096b JW |
2344 | { |
2345 | gfc_add_function (&act_sym->attr, act_sym->name, | |
2346 | &act_sym->declared_at); | |
2347 | if (act_sym->ts.type == BT_UNKNOWN | |
524af0d6 | 2348 | && !gfc_set_default_type (act_sym, 1, act_sym->ns)) |
f3e1097b | 2349 | return false; |
03bd096b JW |
2350 | } |
2351 | else if (formal->attr.subroutine && !act_sym->attr.subroutine) | |
9b63f282 JW |
2352 | gfc_add_subroutine (&act_sym->attr, act_sym->name, |
2353 | &act_sym->declared_at); | |
2354 | ||
f3e1097b | 2355 | return true; |
6de9cd9a DN |
2356 | } |
2357 | ||
5c0ba546 | 2358 | ppc = gfc_get_proc_ptr_comp (actual); |
228eb42a | 2359 | if (ppc && ppc->ts.interface) |
5c0ba546 JW |
2360 | { |
2361 | if (!gfc_compare_interfaces (formal, ppc->ts.interface, ppc->name, 0, 1, | |
2362 | err, sizeof(err), NULL, NULL)) | |
2363 | { | |
2364 | if (where) | |
e0b9e5f9 | 2365 | gfc_error_opt (0, "Interface mismatch in dummy procedure %qs at %L:" |
2700d0e3 | 2366 | " %s", formal->name, &actual->where, err); |
f3e1097b | 2367 | return false; |
5c0ba546 JW |
2368 | } |
2369 | } | |
2370 | ||
fe4e525c TB |
2371 | /* F2008, C1241. */ |
2372 | if (formal->attr.pointer && formal->attr.contiguous | |
460263d0 | 2373 | && !gfc_is_simply_contiguous (actual, true, false)) |
fe4e525c TB |
2374 | { |
2375 | if (where) | |
c4100eae | 2376 | gfc_error ("Actual argument to contiguous pointer dummy %qs at %L " |
62732c30 | 2377 | "must be simply contiguous", formal->name, &actual->where); |
f3e1097b | 2378 | return false; |
fe4e525c TB |
2379 | } |
2380 | ||
fec5ce24 JW |
2381 | symbol_attribute actual_attr = gfc_expr_attr (actual); |
2382 | if (actual->ts.type == BT_CLASS && !actual_attr.class_ok) | |
f3e1097b | 2383 | return true; |
fec5ce24 | 2384 | |
90aeadcb | 2385 | if ((actual->expr_type != EXPR_NULL || actual->ts.type != BT_UNKNOWN) |
df161b69 | 2386 | && actual->ts.type != BT_HOLLERITH |
45a69325 | 2387 | && formal->ts.type != BT_ASSUMED |
e7ac6a7c | 2388 | && !(formal->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK)) |
c49ea23d PT |
2389 | && !gfc_compare_types (&formal->ts, &actual->ts) |
2390 | && !(formal->ts.type == BT_DERIVED && actual->ts.type == BT_CLASS | |
8b704316 | 2391 | && gfc_compare_derived_types (formal->ts.u.derived, |
c49ea23d | 2392 | CLASS_DATA (actual)->ts.u.derived))) |
5ad6345e | 2393 | { |
d68e117b | 2394 | if (where) |
e0b9e5f9 TK |
2395 | { |
2396 | if (formal->attr.artificial) | |
2397 | { | |
2398 | if (!flag_allow_argument_mismatch || !formal->error) | |
2399 | gfc_error_opt (0, "Type mismatch between actual argument at %L " | |
2400 | "and actual argument at %L (%s/%s).", | |
2401 | &actual->where, | |
2402 | &formal->declared_at, | |
f61e54e5 ME |
2403 | gfc_typename (actual), |
2404 | gfc_dummy_typename (&formal->ts)); | |
e0b9e5f9 TK |
2405 | |
2406 | formal->error = 1; | |
2407 | } | |
2408 | else | |
2409 | gfc_error_opt (0, "Type mismatch in argument %qs at %L; passed %s " | |
f61e54e5 ME |
2410 | "to %s", formal->name, where, gfc_typename (actual), |
2411 | gfc_dummy_typename (&formal->ts)); | |
e0b9e5f9 | 2412 | } |
f3e1097b | 2413 | return false; |
5ad6345e | 2414 | } |
f18075ff | 2415 | |
3d54e576 TB |
2416 | if (actual->ts.type == BT_ASSUMED && formal->ts.type != BT_ASSUMED) |
2417 | { | |
2418 | if (where) | |
2419 | gfc_error ("Assumed-type actual argument at %L requires that dummy " | |
c4100eae | 2420 | "argument %qs is of assumed type", &actual->where, |
3d54e576 | 2421 | formal->name); |
f3e1097b | 2422 | return false; |
3d54e576 TB |
2423 | } |
2424 | ||
f18075ff | 2425 | /* F2008, 12.5.2.5; IR F08/0073. */ |
67b1d004 JW |
2426 | if (formal->ts.type == BT_CLASS && formal->attr.class_ok |
2427 | && actual->expr_type != EXPR_NULL | |
f18075ff | 2428 | && ((CLASS_DATA (formal)->attr.class_pointer |
86eb9e2f | 2429 | && formal->attr.intent != INTENT_IN) |
5ac13b8e JW |
2430 | || CLASS_DATA (formal)->attr.allocatable)) |
2431 | { | |
2432 | if (actual->ts.type != BT_CLASS) | |
2433 | { | |
2434 | if (where) | |
c4100eae | 2435 | gfc_error ("Actual argument to %qs at %L must be polymorphic", |
5ac13b8e | 2436 | formal->name, &actual->where); |
f3e1097b | 2437 | return false; |
5ac13b8e | 2438 | } |
67b1d004 | 2439 | |
a8267f8d TB |
2440 | if ((!UNLIMITED_POLY (formal) || !UNLIMITED_POLY(actual)) |
2441 | && !gfc_compare_derived_types (CLASS_DATA (actual)->ts.u.derived, | |
2442 | CLASS_DATA (formal)->ts.u.derived)) | |
5ac13b8e JW |
2443 | { |
2444 | if (where) | |
c4100eae | 2445 | gfc_error ("Actual argument to %qs at %L must have the same " |
5ac13b8e | 2446 | "declared type", formal->name, &actual->where); |
f3e1097b | 2447 | return false; |
5ac13b8e JW |
2448 | } |
2449 | } | |
6de9cd9a | 2450 | |
8b704316 PT |
2451 | /* F08: 12.5.2.5 Allocatable and pointer dummy variables. However, this |
2452 | is necessary also for F03, so retain error for both. | |
2453 | NOTE: Other type/kind errors pre-empt this error. Since they are F03 | |
2454 | compatible, no attempt has been made to channel to this one. */ | |
2455 | if (UNLIMITED_POLY (formal) && !UNLIMITED_POLY (actual) | |
2456 | && (CLASS_DATA (formal)->attr.allocatable | |
2457 | ||CLASS_DATA (formal)->attr.class_pointer)) | |
2458 | { | |
2459 | if (where) | |
c4100eae | 2460 | gfc_error ("Actual argument to %qs at %L must be unlimited " |
8b704316 PT |
2461 | "polymorphic since the formal argument is a " |
2462 | "pointer or allocatable unlimited polymorphic " | |
2463 | "entity [F2008: 12.5.2.5]", formal->name, | |
2464 | &actual->where); | |
f3e1097b | 2465 | return false; |
8b704316 PT |
2466 | } |
2467 | ||
394d3a2e | 2468 | if (formal->attr.codimension && !gfc_is_coarray (actual)) |
d3a9eea2 | 2469 | { |
394d3a2e | 2470 | if (where) |
c4100eae | 2471 | gfc_error ("Actual argument to %qs at %L must be a coarray", |
d3a9eea2 | 2472 | formal->name, &actual->where); |
f3e1097b | 2473 | return false; |
394d3a2e | 2474 | } |
d3a9eea2 | 2475 | |
394d3a2e TB |
2476 | if (formal->attr.codimension && formal->attr.allocatable) |
2477 | { | |
2478 | gfc_ref *last = NULL; | |
a3935ffc | 2479 | |
d3a9eea2 | 2480 | for (ref = actual->ref; ref; ref = ref->next) |
394d3a2e TB |
2481 | if (ref->type == REF_COMPONENT) |
2482 | last = ref; | |
d3a9eea2 | 2483 | |
d3a9eea2 | 2484 | /* F2008, 12.5.2.6. */ |
394d3a2e TB |
2485 | if ((last && last->u.c.component->as->corank != formal->as->corank) |
2486 | || (!last | |
2487 | && actual->symtree->n.sym->as->corank != formal->as->corank)) | |
d3a9eea2 TB |
2488 | { |
2489 | if (where) | |
c4100eae | 2490 | gfc_error ("Corank mismatch in argument %qs at %L (%d and %d)", |
d3a9eea2 TB |
2491 | formal->name, &actual->where, formal->as->corank, |
2492 | last ? last->u.c.component->as->corank | |
2493 | : actual->symtree->n.sym->as->corank); | |
f3e1097b | 2494 | return false; |
d3a9eea2 | 2495 | } |
394d3a2e | 2496 | } |
fe4e525c | 2497 | |
394d3a2e TB |
2498 | if (formal->attr.codimension) |
2499 | { | |
460263d0 | 2500 | /* F2008, 12.5.2.8 + Corrig 2 (IR F08/0048). */ |
8179b067 | 2501 | /* F2018, 12.5.2.8. */ |
fe4e525c TB |
2502 | if (formal->attr.dimension |
2503 | && (formal->attr.contiguous || formal->as->type != AS_ASSUMED_SHAPE) | |
fec5ce24 | 2504 | && actual_attr.dimension |
460263d0 | 2505 | && !gfc_is_simply_contiguous (actual, true, true)) |
fe4e525c TB |
2506 | { |
2507 | if (where) | |
c4100eae | 2508 | gfc_error ("Actual argument to %qs at %L must be simply " |
460263d0 TB |
2509 | "contiguous or an element of such an array", |
2510 | formal->name, &actual->where); | |
f3e1097b | 2511 | return false; |
fe4e525c | 2512 | } |
fea54935 TB |
2513 | |
2514 | /* F2008, C1303 and C1304. */ | |
2515 | if (formal->attr.intent != INTENT_INOUT | |
2516 | && (((formal->ts.type == BT_DERIVED || formal->ts.type == BT_CLASS) | |
2517 | && formal->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV | |
2518 | && formal->ts.u.derived->intmod_sym_id == ISOFORTRAN_LOCK_TYPE) | |
2519 | || formal->attr.lock_comp)) | |
2520 | ||
2521 | { | |
2522 | if (where) | |
c4100eae | 2523 | gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, " |
fea54935 TB |
2524 | "which is LOCK_TYPE or has a LOCK_TYPE component", |
2525 | formal->name, &actual->where); | |
f3e1097b | 2526 | return false; |
fea54935 | 2527 | } |
5df445a2 TB |
2528 | |
2529 | /* TS18508, C702/C703. */ | |
2530 | if (formal->attr.intent != INTENT_INOUT | |
2531 | && (((formal->ts.type == BT_DERIVED || formal->ts.type == BT_CLASS) | |
2532 | && formal->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV | |
2533 | && formal->ts.u.derived->intmod_sym_id == ISOFORTRAN_EVENT_TYPE) | |
2534 | || formal->attr.event_comp)) | |
2535 | ||
2536 | { | |
2537 | if (where) | |
2538 | gfc_error ("Actual argument to non-INTENT(INOUT) dummy %qs at %L, " | |
2539 | "which is EVENT_TYPE or has a EVENT_TYPE component", | |
2540 | formal->name, &actual->where); | |
f3e1097b | 2541 | return false; |
5df445a2 | 2542 | } |
394d3a2e | 2543 | } |
fe4e525c TB |
2544 | |
2545 | /* F2008, C1239/C1240. */ | |
2546 | if (actual->expr_type == EXPR_VARIABLE | |
2547 | && (actual->symtree->n.sym->attr.asynchronous | |
2548 | || actual->symtree->n.sym->attr.volatile_) | |
2549 | && (formal->attr.asynchronous || formal->attr.volatile_) | |
460263d0 TB |
2550 | && actual->rank && formal->as |
2551 | && !gfc_is_simply_contiguous (actual, true, false) | |
f188272d TB |
2552 | && ((formal->as->type != AS_ASSUMED_SHAPE |
2553 | && formal->as->type != AS_ASSUMED_RANK && !formal->attr.pointer) | |
fe4e525c TB |
2554 | || formal->attr.contiguous)) |
2555 | { | |
2556 | if (where) | |
c4100eae | 2557 | gfc_error ("Dummy argument %qs has to be a pointer, assumed-shape or " |
f188272d TB |
2558 | "assumed-rank array without CONTIGUOUS attribute - as actual" |
2559 | " argument at %L is not simply contiguous and both are " | |
2560 | "ASYNCHRONOUS or VOLATILE", formal->name, &actual->where); | |
f3e1097b | 2561 | return false; |
d3a9eea2 TB |
2562 | } |
2563 | ||
427180d2 | 2564 | if (formal->attr.allocatable && !formal->attr.codimension |
fec5ce24 | 2565 | && actual_attr.codimension) |
427180d2 TB |
2566 | { |
2567 | if (formal->attr.intent == INTENT_OUT) | |
2568 | { | |
2569 | if (where) | |
2570 | gfc_error ("Passing coarray at %L to allocatable, noncoarray, " | |
c4100eae | 2571 | "INTENT(OUT) dummy argument %qs", &actual->where, |
427180d2 | 2572 | formal->name); |
f3e1097b | 2573 | return false; |
427180d2 | 2574 | } |
73e42eef | 2575 | else if (warn_surprising && where && formal->attr.intent != INTENT_IN) |
48749dbc MLI |
2576 | gfc_warning (OPT_Wsurprising, |
2577 | "Passing coarray at %L to allocatable, noncoarray dummy " | |
2578 | "argument %qs, which is invalid if the allocation status" | |
427180d2 TB |
2579 | " is modified", &actual->where, formal->name); |
2580 | } | |
2581 | ||
c62c6622 TB |
2582 | /* If the rank is the same or the formal argument has assumed-rank. */ |
2583 | if (symbol_rank (formal) == actual->rank || symbol_rank (formal) == -1) | |
f3e1097b | 2584 | return true; |
6de9cd9a | 2585 | |
5ad6345e TB |
2586 | rank_check = where != NULL && !is_elemental && formal->as |
2587 | && (formal->as->type == AS_ASSUMED_SHAPE | |
d8a8dab3 TB |
2588 | || formal->as->type == AS_DEFERRED) |
2589 | && actual->expr_type != EXPR_NULL; | |
6de9cd9a | 2590 | |
e7ac6a7c TB |
2591 | /* Skip rank checks for NO_ARG_CHECK. */ |
2592 | if (formal->attr.ext_attr & (1 << EXT_ATTR_NO_ARG_CHECK)) | |
f3e1097b | 2593 | return true; |
e7ac6a7c | 2594 | |
d3a9eea2 | 2595 | /* Scalar & coindexed, see: F2008, Section 12.5.2.4. */ |
d8a8dab3 TB |
2596 | if (rank_check || ranks_must_agree |
2597 | || (formal->attr.pointer && actual->expr_type != EXPR_NULL) | |
5ad6345e | 2598 | || (actual->rank != 0 && !(is_elemental || formal->attr.dimension)) |
c49ea23d PT |
2599 | || (actual->rank == 0 |
2600 | && ((formal->ts.type == BT_CLASS | |
2601 | && CLASS_DATA (formal)->as->type == AS_ASSUMED_SHAPE) | |
2602 | || (formal->ts.type != BT_CLASS | |
2603 | && formal->as->type == AS_ASSUMED_SHAPE)) | |
08857b61 | 2604 | && actual->expr_type != EXPR_NULL) |
d3a9eea2 TB |
2605 | || (actual->rank == 0 && formal->attr.dimension |
2606 | && gfc_is_coindexed (actual))) | |
5ad6345e | 2607 | { |
4a4fc7fe TK |
2608 | if (where |
2609 | && (!formal->attr.artificial || (!formal->maybe_array | |
2610 | && !maybe_dummy_array_arg (actual)))) | |
e0b9e5f9 TK |
2611 | { |
2612 | locus *where_formal; | |
2613 | if (formal->attr.artificial) | |
2614 | where_formal = &formal->declared_at; | |
2615 | else | |
2616 | where_formal = NULL; | |
2617 | ||
2618 | argument_rank_mismatch (formal->name, &actual->where, | |
2619 | symbol_rank (formal), actual->rank, | |
2620 | where_formal); | |
2621 | } | |
f3e1097b | 2622 | return false; |
5ad6345e TB |
2623 | } |
2624 | else if (actual->rank != 0 && (is_elemental || formal->attr.dimension)) | |
f3e1097b | 2625 | return true; |
5ad6345e TB |
2626 | |
2627 | /* At this point, we are considering a scalar passed to an array. This | |
975b975b | 2628 | is valid (cf. F95 12.4.1.1, F2003 12.4.1.2, and F2008 12.5.2.4), |
5ad6345e | 2629 | - if the actual argument is (a substring of) an element of a |
975b975b TB |
2630 | non-assumed-shape/non-pointer/non-polymorphic array; or |
2631 | - (F2003) if the actual argument is of type character of default/c_char | |
2632 | kind. */ | |
2633 | ||
2634 | is_pointer = actual->expr_type == EXPR_VARIABLE | |
2635 | ? actual->symtree->n.sym->attr.pointer : false; | |
6de9cd9a DN |
2636 | |
2637 | for (ref = actual->ref; ref; ref = ref->next) | |
975b975b TB |
2638 | { |
2639 | if (ref->type == REF_COMPONENT) | |
2640 | is_pointer = ref->u.c.component->attr.pointer; | |
2641 | else if (ref->type == REF_ARRAY && ref->u.ar.type == AR_ELEMENT | |
2642 | && ref->u.ar.dimen > 0 | |
8b704316 | 2643 | && (!ref->next |
975b975b TB |
2644 | || (ref->next->type == REF_SUBSTRING && !ref->next->next))) |
2645 | break; | |
2646 | } | |
2647 | ||
2648 | if (actual->ts.type == BT_CLASS && actual->expr_type != EXPR_NULL) | |
2649 | { | |
2650 | if (where) | |
c4100eae | 2651 | gfc_error ("Polymorphic scalar passed to array dummy argument %qs " |
975b975b | 2652 | "at %L", formal->name, &actual->where); |
f3e1097b | 2653 | return false; |
975b975b TB |
2654 | } |
2655 | ||
2656 | if (actual->expr_type != EXPR_NULL && ref && actual->ts.type != BT_CHARACTER | |
2657 | && (is_pointer || ref->u.ar.as->type == AS_ASSUMED_SHAPE)) | |
2658 | { | |
2659 | if (where) | |
4a4fc7fe TK |
2660 | { |
2661 | if (formal->attr.artificial) | |
2662 | gfc_error ("Element of assumed-shape or pointer array " | |
7260547d TK |
2663 | "as actual argument at %L cannot correspond to " |
2664 | "actual argument at %L", | |
4a4fc7fe TK |
2665 | &actual->where, &formal->declared_at); |
2666 | else | |
2667 | gfc_error ("Element of assumed-shape or pointer " | |
2668 | "array passed to array dummy argument %qs at %L", | |
2669 | formal->name, &actual->where); | |
2670 | } | |
f3e1097b | 2671 | return false; |
975b975b | 2672 | } |
6de9cd9a | 2673 | |
975b975b TB |
2674 | if (actual->ts.type == BT_CHARACTER && actual->expr_type != EXPR_NULL |
2675 | && (!ref || is_pointer || ref->u.ar.as->type == AS_ASSUMED_SHAPE)) | |
5ad6345e | 2676 | { |
975b975b TB |
2677 | if (formal->ts.kind != 1 && (gfc_option.allow_std & GFC_STD_GNU) == 0) |
2678 | { | |
2679 | if (where) | |
2680 | gfc_error ("Extension: Scalar non-default-kind, non-C_CHAR-kind " | |
2681 | "CHARACTER actual argument with array dummy argument " | |
c4100eae | 2682 | "%qs at %L", formal->name, &actual->where); |
f3e1097b | 2683 | return false; |
975b975b TB |
2684 | } |
2685 | ||
5ad6345e TB |
2686 | if (where && (gfc_option.allow_std & GFC_STD_F2003) == 0) |
2687 | { | |
2688 | gfc_error ("Fortran 2003: Scalar CHARACTER actual argument with " | |
c4100eae | 2689 | "array dummy argument %qs at %L", |
5ad6345e | 2690 | formal->name, &actual->where); |
f3e1097b | 2691 | return false; |
5ad6345e | 2692 | } |
5ad6345e | 2693 | else |
f3e1097b | 2694 | return ((gfc_option.allow_std & GFC_STD_F2003) != 0); |
5ad6345e | 2695 | } |
975b975b TB |
2696 | |
2697 | if (ref == NULL && actual->expr_type != EXPR_NULL) | |
5ad6345e | 2698 | { |
4a4fc7fe TK |
2699 | if (where |
2700 | && (!formal->attr.artificial || (!formal->maybe_array | |
2701 | && !maybe_dummy_array_arg (actual)))) | |
e0b9e5f9 TK |
2702 | { |
2703 | locus *where_formal; | |
2704 | if (formal->attr.artificial) | |
2705 | where_formal = &formal->declared_at; | |
2706 | else | |
2707 | where_formal = NULL; | |
2708 | ||
2709 | argument_rank_mismatch (formal->name, &actual->where, | |
2710 | symbol_rank (formal), actual->rank, | |
2711 | where_formal); | |
2712 | } | |
f3e1097b | 2713 | return false; |
5ad6345e TB |
2714 | } |
2715 | ||
f3e1097b | 2716 | return true; |
6de9cd9a DN |
2717 | } |
2718 | ||
2719 | ||
2d5b90b2 TB |
2720 | /* Returns the storage size of a symbol (formal argument) or |
2721 | zero if it cannot be determined. */ | |
2722 | ||
2723 | static unsigned long | |
2724 | get_sym_storage_size (gfc_symbol *sym) | |
2725 | { | |
2726 | int i; | |
2727 | unsigned long strlen, elements; | |
2728 | ||
2729 | if (sym->ts.type == BT_CHARACTER) | |
2730 | { | |
bc21d315 JW |
2731 | if (sym->ts.u.cl && sym->ts.u.cl->length |
2732 | && sym->ts.u.cl->length->expr_type == EXPR_CONSTANT) | |
2733 | strlen = mpz_get_ui (sym->ts.u.cl->length->value.integer); | |
2d5b90b2 TB |
2734 | else |
2735 | return 0; | |
2736 | } | |
2737 | else | |
8b704316 | 2738 | strlen = 1; |
2d5b90b2 TB |
2739 | |
2740 | if (symbol_rank (sym) == 0) | |
2741 | return strlen; | |
2742 | ||
2743 | elements = 1; | |
2744 | if (sym->as->type != AS_EXPLICIT) | |
2745 | return 0; | |
2746 | for (i = 0; i < sym->as->rank; i++) | |
2747 | { | |
efb63364 | 2748 | if (sym->as->upper[i]->expr_type != EXPR_CONSTANT |
2d5b90b2 TB |
2749 | || sym->as->lower[i]->expr_type != EXPR_CONSTANT) |
2750 | return 0; | |
2751 | ||
c13af44b SK |
2752 | elements *= mpz_get_si (sym->as->upper[i]->value.integer) |
2753 | - mpz_get_si (sym->as->lower[i]->value.integer) + 1L; | |
2d5b90b2 TB |
2754 | } |
2755 | ||
2756 | return strlen*elements; | |
2757 | } | |
2758 | ||
2759 | ||
2760 | /* Returns the storage size of an expression (actual argument) or | |
2761 | zero if it cannot be determined. For an array element, it returns | |
1207ac67 | 2762 | the remaining size as the element sequence consists of all storage |
2d5b90b2 TB |
2763 | units of the actual argument up to the end of the array. */ |
2764 | ||
2765 | static unsigned long | |
2766 | get_expr_storage_size (gfc_expr *e) | |
2767 | { | |
2768 | int i; | |
2769 | long int strlen, elements; | |
6da0839a | 2770 | long int substrlen = 0; |
a0710c29 | 2771 | bool is_str_storage = false; |
2d5b90b2 TB |
2772 | gfc_ref *ref; |
2773 | ||
2774 | if (e == NULL) | |
2775 | return 0; | |
8b704316 | 2776 | |
2d5b90b2 TB |
2777 | if (e->ts.type == BT_CHARACTER) |
2778 | { | |
bc21d315 JW |
2779 | if (e->ts.u.cl && e->ts.u.cl->length |
2780 | && e->ts.u.cl->length->expr_type == EXPR_CONSTANT) | |
2781 | strlen = mpz_get_si (e->ts.u.cl->length->value.integer); | |
2d5b90b2 | 2782 | else if (e->expr_type == EXPR_CONSTANT |
bc21d315 | 2783 | && (e->ts.u.cl == NULL || e->ts.u.cl->length == NULL)) |
2d5b90b2 TB |
2784 | strlen = e->value.character.length; |
2785 | else | |
2786 | return 0; | |
2787 | } | |
2788 | else | |
2789 | strlen = 1; /* Length per element. */ | |
2790 | ||
2791 | if (e->rank == 0 && !e->ref) | |
2792 | return strlen; | |
2793 | ||
2794 | elements = 1; | |
2795 | if (!e->ref) | |
2796 | { | |
2797 | if (!e->shape) | |
2798 | return 0; | |
2799 | for (i = 0; i < e->rank; i++) | |
2800 | elements *= mpz_get_si (e->shape[i]); | |
2801 | return elements*strlen; | |
2802 | } | |
2803 | ||
2804 | for (ref = e->ref; ref; ref = ref->next) | |
2805 | { | |
6da0839a TB |
2806 | if (ref->type == REF_SUBSTRING && ref->u.ss.start |
2807 | && ref->u.ss.start->expr_type == EXPR_CONSTANT) | |
2808 | { | |
a0710c29 TB |
2809 | if (is_str_storage) |
2810 | { | |
2811 | /* The string length is the substring length. | |
2812 | Set now to full string length. */ | |
e323640f | 2813 | if (!ref->u.ss.length || !ref->u.ss.length->length |
a0710c29 TB |
2814 | || ref->u.ss.length->length->expr_type != EXPR_CONSTANT) |
2815 | return 0; | |
2816 | ||
2817 | strlen = mpz_get_ui (ref->u.ss.length->length->value.integer); | |
2818 | } | |
2819 | substrlen = strlen - mpz_get_ui (ref->u.ss.start->value.integer) + 1; | |
6da0839a TB |
2820 | continue; |
2821 | } | |
2822 | ||
efb63364 | 2823 | if (ref->type == REF_ARRAY && ref->u.ar.type == AR_SECTION) |
2d5b90b2 TB |
2824 | for (i = 0; i < ref->u.ar.dimen; i++) |
2825 | { | |
2826 | long int start, end, stride; | |
2827 | stride = 1; | |
37639728 | 2828 | |
2d5b90b2 TB |
2829 | if (ref->u.ar.stride[i]) |
2830 | { | |
2831 | if (ref->u.ar.stride[i]->expr_type == EXPR_CONSTANT) | |
2832 | stride = mpz_get_si (ref->u.ar.stride[i]->value.integer); | |
2833 | else | |
2834 | return 0; | |
2835 | } | |
2836 | ||
2837 | if (ref->u.ar.start[i]) | |
2838 | { | |
2839 | if (ref->u.ar.start[i]->expr_type == EXPR_CONSTANT) | |
2840 | start = mpz_get_si (ref->u.ar.start[i]->value.integer); | |
2841 | else | |
2842 | return 0; | |
2843 | } | |
37639728 TB |
2844 | else if (ref->u.ar.as->lower[i] |
2845 | && ref->u.ar.as->lower[i]->expr_type == EXPR_CONSTANT) | |
2846 | start = mpz_get_si (ref->u.ar.as->lower[i]->value.integer); | |
2847 | else | |
2848 | return 0; | |
2d5b90b2 TB |
2849 | |
2850 | if (ref->u.ar.end[i]) | |
2851 | { | |
2852 | if (ref->u.ar.end[i]->expr_type == EXPR_CONSTANT) | |
2853 | end = mpz_get_si (ref->u.ar.end[i]->value.integer); | |
2854 | else | |
2855 | return 0; | |
2856 | } | |
2857 | else if (ref->u.ar.as->upper[i] | |
2858 | && ref->u.ar.as->upper[i]->expr_type == EXPR_CONSTANT) | |
2859 | end = mpz_get_si (ref->u.ar.as->upper[i]->value.integer); | |
2860 | else | |
2861 | return 0; | |
2862 | ||
2863 | elements *= (end - start)/stride + 1L; | |
2864 | } | |
c6423ef3 | 2865 | else if (ref->type == REF_ARRAY && ref->u.ar.type == AR_FULL) |
2d5b90b2 TB |
2866 | for (i = 0; i < ref->u.ar.as->rank; i++) |
2867 | { | |
2868 | if (ref->u.ar.as->lower[i] && ref->u.ar.as->upper[i] | |
2869 | && ref->u.ar.as->lower[i]->expr_type == EXPR_CONSTANT | |
edcc76d5 SK |
2870 | && ref->u.ar.as->lower[i]->ts.type == BT_INTEGER |
2871 | && ref->u.ar.as->upper[i]->expr_type == EXPR_CONSTANT | |
2872 | && ref->u.ar.as->upper[i]->ts.type == BT_INTEGER) | |
da9ad923 TB |
2873 | elements *= mpz_get_si (ref->u.ar.as->upper[i]->value.integer) |
2874 | - mpz_get_si (ref->u.ar.as->lower[i]->value.integer) | |
2d5b90b2 TB |
2875 | + 1L; |
2876 | else | |
2877 | return 0; | |
2878 | } | |
6da0839a | 2879 | else if (ref->type == REF_ARRAY && ref->u.ar.type == AR_ELEMENT |
a0710c29 TB |
2880 | && e->expr_type == EXPR_VARIABLE) |
2881 | { | |
93302a24 | 2882 | if (ref->u.ar.as->type == AS_ASSUMED_SHAPE |
a0710c29 TB |
2883 | || e->symtree->n.sym->attr.pointer) |
2884 | { | |
2885 | elements = 1; | |
2886 | continue; | |
2887 | } | |
2888 | ||
2889 | /* Determine the number of remaining elements in the element | |
2890 | sequence for array element designators. */ | |
2891 | is_str_storage = true; | |
2892 | for (i = ref->u.ar.dimen - 1; i >= 0; i--) | |
2893 | { | |
2894 | if (ref->u.ar.start[i] == NULL | |
2895 | || ref->u.ar.start[i]->expr_type != EXPR_CONSTANT | |
2896 | || ref->u.ar.as->upper[i] == NULL | |
2897 | || ref->u.ar.as->lower[i] == NULL | |
2898 | || ref->u.ar.as->upper[i]->expr_type != EXPR_CONSTANT | |
2899 | || ref->u.ar.as->lower[i]->expr_type != EXPR_CONSTANT) | |
2900 | return 0; | |
2901 | ||
2902 | elements | |
2903 | = elements | |
2904 | * (mpz_get_si (ref->u.ar.as->upper[i]->value.integer) | |
2905 | - mpz_get_si (ref->u.ar.as->lower[i]->value.integer) | |
2906 | + 1L) | |
2907 | - (mpz_get_si (ref->u.ar.start[i]->value.integer) | |
2908 | - mpz_get_si (ref->u.ar.as->lower[i]->value.integer)); | |
2909 | } | |
2910 | } | |
3436db75 JW |
2911 | else if (ref->type == REF_COMPONENT && ref->u.c.component->attr.function |
2912 | && ref->u.c.component->attr.proc_pointer | |
2913 | && ref->u.c.component->attr.dimension) | |
2914 | { | |
2915 | /* Array-valued procedure-pointer components. */ | |
2916 | gfc_array_spec *as = ref->u.c.component->as; | |
2917 | for (i = 0; i < as->rank; i++) | |
2918 | { | |
2919 | if (!as->upper[i] || !as->lower[i] | |
2920 | || as->upper[i]->expr_type != EXPR_CONSTANT | |
2921 | || as->lower[i]->expr_type != EXPR_CONSTANT) | |
2922 | return 0; | |
2923 | ||
2924 | elements = elements | |
2925 | * (mpz_get_si (as->upper[i]->value.integer) | |
2926 | - mpz_get_si (as->lower[i]->value.integer) + 1L); | |
2927 | } | |
2928 | } | |
2d5b90b2 TB |
2929 | } |
2930 | ||
6da0839a | 2931 | if (substrlen) |
a0710c29 TB |
2932 | return (is_str_storage) ? substrlen + (elements-1)*strlen |
2933 | : elements*strlen; | |
2934 | else | |
2935 | return elements*strlen; | |
2d5b90b2 TB |
2936 | } |
2937 | ||
2938 | ||
59be8071 | 2939 | /* Given an expression, check whether it is an array section |
f3e1097b | 2940 | which has a vector subscript. */ |
59be8071 | 2941 | |
f3e1097b | 2942 | bool |
03af1e4c | 2943 | gfc_has_vector_subscript (gfc_expr *e) |
59be8071 TB |
2944 | { |
2945 | int i; | |
2946 | gfc_ref *ref; | |
2947 | ||
2948 | if (e == NULL || e->rank == 0 || e->expr_type != EXPR_VARIABLE) | |
f3e1097b | 2949 | return false; |
59be8071 TB |
2950 | |
2951 | for (ref = e->ref; ref; ref = ref->next) | |
2952 | if (ref->type == REF_ARRAY && ref->u.ar.type == AR_SECTION) | |
2953 | for (i = 0; i < ref->u.ar.dimen; i++) | |
2954 | if (ref->u.ar.dimen_type[i] == DIMEN_VECTOR) | |
f3e1097b | 2955 | return true; |
59be8071 | 2956 | |
f3e1097b | 2957 | return false; |
59be8071 TB |
2958 | } |
2959 | ||
2960 | ||
4294c093 JW |
2961 | static bool |
2962 | is_procptr_result (gfc_expr *expr) | |
2963 | { | |
2964 | gfc_component *c = gfc_get_proc_ptr_comp (expr); | |
2965 | if (c) | |
2966 | return (c->ts.interface && (c->ts.interface->attr.proc_pointer == 1)); | |
2967 | else | |
2968 | return ((expr->symtree->n.sym->result != expr->symtree->n.sym) | |
2969 | && (expr->symtree->n.sym->result->attr.proc_pointer == 1)); | |
2970 | } | |
2971 | ||
2972 | ||
bcc478b9 BRF |
2973 | /* Recursively append candidate argument ARG to CANDIDATES. Store the |
2974 | number of total candidates in CANDIDATES_LEN. */ | |
2975 | ||
2976 | static void | |
2977 | lookup_arg_fuzzy_find_candidates (gfc_formal_arglist *arg, | |
2978 | char **&candidates, | |
2979 | size_t &candidates_len) | |
2980 | { | |
2981 | for (gfc_formal_arglist *p = arg; p && p->sym; p = p->next) | |
2982 | vec_push (candidates, candidates_len, p->sym->name); | |
2983 | } | |
2984 | ||
2985 | ||
2986 | /* Lookup argument ARG fuzzily, taking names in ARGUMENTS into account. */ | |
2987 | ||
2988 | static const char* | |
2989 | lookup_arg_fuzzy (const char *arg, gfc_formal_arglist *arguments) | |
2990 | { | |
2991 | char **candidates = NULL; | |
2992 | size_t candidates_len = 0; | |
2993 | lookup_arg_fuzzy_find_candidates (arguments, candidates, candidates_len); | |
2994 | return gfc_closest_fuzzy_match (arg, candidates); | |
2995 | } | |
2996 | ||
2997 | ||
6de9cd9a DN |
2998 | /* Given formal and actual argument lists, see if they are compatible. |
2999 | If they are compatible, the actual argument list is sorted to | |
3000 | correspond with the formal list, and elements for missing optional | |
3001 | arguments are inserted. If WHERE pointer is nonnull, then we issue | |
3002 | errors when things don't match instead of just returning the status | |
3003 | code. */ | |
3004 | ||
e68a35ae TK |
3005 | bool |
3006 | gfc_compare_actual_formal (gfc_actual_arglist **ap, gfc_formal_arglist *formal, | |
3007 | int ranks_must_agree, int is_elemental, | |
3008 | bool in_statement_function, locus *where) | |
6de9cd9a | 3009 | { |
fab27f52 | 3010 | gfc_actual_arglist **new_arg, *a, *actual; |
6de9cd9a DN |
3011 | gfc_formal_arglist *f; |
3012 | int i, n, na; | |
2d5b90b2 | 3013 | unsigned long actual_size, formal_size; |
c49ea23d | 3014 | bool full_array = false; |
eb401400 | 3015 | gfc_array_ref *actual_arr_ref; |
6de9cd9a DN |
3016 | |
3017 | actual = *ap; | |
3018 | ||
3019 | if (actual == NULL && formal == NULL) | |
f3e1097b | 3020 | return true; |
6de9cd9a DN |
3021 | |
3022 | n = 0; | |
3023 | for (f = formal; f; f = f->next) | |
3024 | n++; | |
3025 | ||
1145e690 | 3026 | new_arg = XALLOCAVEC (gfc_actual_arglist *, n); |
6de9cd9a DN |
3027 | |
3028 | for (i = 0; i < n; i++) | |
7b901ac4 | 3029 | new_arg[i] = NULL; |
6de9cd9a DN |
3030 | |
3031 | na = 0; | |
3032 | f = formal; | |
3033 | i = 0; | |
3034 | ||
3035 | for (a = actual; a; a = a->next, f = f->next) | |
3036 | { | |
3453b6aa SK |
3037 | if (a->name != NULL && in_statement_function) |
3038 | { | |
3039 | gfc_error ("Keyword argument %qs at %L is invalid in " | |
3040 | "a statement function", a->name, &a->expr->where); | |
3041 | return false; | |
3042 | } | |
3043 | ||
7fcafa71 PT |
3044 | /* Look for keywords but ignore g77 extensions like %VAL. */ |
3045 | if (a->name != NULL && a->name[0] != '%') | |
6de9cd9a DN |
3046 | { |
3047 | i = 0; | |
3048 | for (f = formal; f; f = f->next, i++) | |
3049 | { | |
3050 | if (f->sym == NULL) | |
3051 | continue; | |
3052 | if (strcmp (f->sym->name, a->name) == 0) | |
3053 | break; | |
3054 | } | |
3055 | ||
3056 | if (f == NULL) | |
3057 | { | |
3058 | if (where) | |
bcc478b9 BRF |
3059 | { |
3060 | const char *guessed = lookup_arg_fuzzy (a->name, formal); | |
3061 | if (guessed) | |
3062 | gfc_error ("Keyword argument %qs at %L is not in " | |
3063 | "the procedure; did you mean %qs?", | |
3064 | a->name, &a->expr->where, guessed); | |
3065 | else | |
3066 | gfc_error ("Keyword argument %qs at %L is not in " | |
3067 | "the procedure", a->name, &a->expr->where); | |
3068 | } | |
f3e1097b | 3069 | return false; |
6de9cd9a DN |
3070 | } |
3071 | ||
7b901ac4 | 3072 | if (new_arg[i] != NULL) |
6de9cd9a DN |
3073 | { |
3074 | if (where) | |
c4100eae | 3075 | gfc_error ("Keyword argument %qs at %L is already associated " |
b251af97 SK |
3076 | "with another actual argument", a->name, |
3077 | &a->expr->where); | |
f3e1097b | 3078 | return false; |
6de9cd9a DN |
3079 | } |
3080 | } | |
3081 | ||
3082 | if (f == NULL) | |
3083 | { | |
3084 | if (where) | |
b251af97 SK |
3085 | gfc_error ("More actual than formal arguments in procedure " |
3086 | "call at %L", where); | |
6de9cd9a | 3087 | |
f3e1097b | 3088 | return false; |
6de9cd9a DN |
3089 | } |
3090 | ||
3091 | if (f->sym == NULL && a->expr == NULL) | |
3092 | goto match; | |
3093 | ||
3094 | if (f->sym == NULL) | |
3095 | { | |
866664a3 TK |
3096 | /* These errors have to be issued, otherwise an ICE can occur. |
3097 | See PR 78865. */ | |
6de9cd9a | 3098 | if (where) |
866664a3 TK |
3099 | gfc_error_now ("Missing alternate return specifier in subroutine " |
3100 | "call at %L", where); | |
f3e1097b | 3101 | return false; |
6de9cd9a DN |
3102 | } |
3103 | ||
3104 | if (a->expr == NULL) | |
3105 | { | |
fb078366 TK |
3106 | if (f->sym->attr.optional) |
3107 | continue; | |
3108 | else | |
3109 | { | |
3110 | if (where) | |
3111 | gfc_error_now ("Unexpected alternate return specifier in " | |
3112 | "subroutine call at %L", where); | |
3113 | return false; | |
3114 | } | |
6de9cd9a | 3115 | } |
08857b61 | 3116 | |
8b704316 PT |
3117 | /* Make sure that intrinsic vtables exist for calls to unlimited |
3118 | polymorphic formal arguments. */ | |
524af0d6 | 3119 | if (UNLIMITED_POLY (f->sym) |
8b704316 | 3120 | && a->expr->ts.type != BT_DERIVED |
15e5858f TK |
3121 | && a->expr->ts.type != BT_CLASS |
3122 | && a->expr->ts.type != BT_ASSUMED) | |
7289d1c9 | 3123 | gfc_find_vtab (&a->expr->ts); |
8b704316 | 3124 | |
99091b70 TB |
3125 | if (a->expr->expr_type == EXPR_NULL |
3126 | && ((f->sym->ts.type != BT_CLASS && !f->sym->attr.pointer | |
3127 | && (f->sym->attr.allocatable || !f->sym->attr.optional | |
3128 | || (gfc_option.allow_std & GFC_STD_F2008) == 0)) | |
3129 | || (f->sym->ts.type == BT_CLASS | |
3130 | && !CLASS_DATA (f->sym)->attr.class_pointer | |
3131 | && (CLASS_DATA (f->sym)->attr.allocatable | |
3132 | || !f->sym->attr.optional | |
3133 | || (gfc_option.allow_std & GFC_STD_F2008) == 0)))) | |
08857b61 | 3134 | { |
99091b70 TB |
3135 | if (where |
3136 | && (!f->sym->attr.optional | |
3137 | || (f->sym->ts.type != BT_CLASS && f->sym->attr.allocatable) | |
3138 | || (f->sym->ts.type == BT_CLASS | |
3139 | && CLASS_DATA (f->sym)->attr.allocatable))) | |
c4100eae | 3140 | gfc_error ("Unexpected NULL() intrinsic at %L to dummy %qs", |
08857b61 TB |
3141 | where, f->sym->name); |
3142 | else if (where) | |
3143 | gfc_error ("Fortran 2008: Null pointer at %L to non-pointer " | |
c4100eae | 3144 | "dummy %qs", where, f->sym->name); |
08857b61 | 3145 | |
f3e1097b | 3146 | return false; |
08857b61 | 3147 | } |
8b704316 | 3148 | |
5ad6345e TB |
3149 | if (!compare_parameter (f->sym, a->expr, ranks_must_agree, |
3150 | is_elemental, where)) | |
f3e1097b | 3151 | return false; |
6de9cd9a | 3152 | |
45a69325 TB |
3153 | /* TS 29113, 6.3p2. */ |
3154 | if (f->sym->ts.type == BT_ASSUMED | |
3155 | && (a->expr->ts.type == BT_DERIVED | |
3156 | || (a->expr->ts.type == BT_CLASS && CLASS_DATA (a->expr)))) | |
3157 | { | |
3158 | gfc_namespace *f2k_derived; | |
3159 | ||
3160 | f2k_derived = a->expr->ts.type == BT_DERIVED | |
3161 | ? a->expr->ts.u.derived->f2k_derived | |
3162 | : CLASS_DATA (a->expr)->ts.u.derived->f2k_derived; | |
3163 | ||
3164 | if (f2k_derived | |
3165 | && (f2k_derived->finalizers || f2k_derived->tb_sym_root)) | |
3166 | { | |
3167 | gfc_error ("Actual argument at %L to assumed-type dummy is of " | |
3168 | "derived type with type-bound or FINAL procedures", | |
3169 | &a->expr->where); | |
524af0d6 | 3170 | return false; |
45a69325 TB |
3171 | } |
3172 | } | |
3173 | ||
a0710c29 TB |
3174 | /* Special case for character arguments. For allocatable, pointer |
3175 | and assumed-shape dummies, the string length needs to match | |
3176 | exactly. */ | |
2d5b90b2 | 3177 | if (a->expr->ts.type == BT_CHARACTER |
eb401400 AV |
3178 | && a->expr->ts.u.cl && a->expr->ts.u.cl->length |
3179 | && a->expr->ts.u.cl->length->expr_type == EXPR_CONSTANT | |
3180 | && f->sym->ts.type == BT_CHARACTER && f->sym->ts.u.cl | |
3181 | && f->sym->ts.u.cl->length | |
3182 | && f->sym->ts.u.cl->length->expr_type == EXPR_CONSTANT | |
3183 | && (f->sym->attr.pointer || f->sym->attr.allocatable | |
3184 | || (f->sym->as && f->sym->as->type == AS_ASSUMED_SHAPE)) | |
3185 | && (mpz_cmp (a->expr->ts.u.cl->length->value.integer, | |
3186 | f->sym->ts.u.cl->length->value.integer) != 0)) | |
3187 | { | |
3188 | if (where && (f->sym->attr.pointer || f->sym->attr.allocatable)) | |
e0b9e5f9 | 3189 | gfc_warning (0, "Character length mismatch (%ld/%ld) between actual " |
eb401400 AV |
3190 | "argument and pointer or allocatable dummy argument " |
3191 | "%qs at %L", | |
3192 | mpz_get_si (a->expr->ts.u.cl->length->value.integer), | |
3193 | mpz_get_si (f->sym->ts.u.cl->length->value.integer), | |
3194 | f->sym->name, &a->expr->where); | |
3195 | else if (where) | |
e0b9e5f9 | 3196 | gfc_warning (0, "Character length mismatch (%ld/%ld) between actual " |
eb401400 AV |
3197 | "argument and assumed-shape dummy argument %qs " |
3198 | "at %L", | |
3199 | mpz_get_si (a->expr->ts.u.cl->length->value.integer), | |
3200 | mpz_get_si (f->sym->ts.u.cl->length->value.integer), | |
3201 | f->sym->name, &a->expr->where); | |
f3e1097b | 3202 | return false; |
eb401400 | 3203 | } |
a0324f7b | 3204 | |
8d51f26f | 3205 | if ((f->sym->attr.pointer || f->sym->attr.allocatable) |
eb401400 AV |
3206 | && f->sym->ts.deferred != a->expr->ts.deferred |
3207 | && a->expr->ts.type == BT_CHARACTER) | |
8d51f26f PT |
3208 | { |
3209 | if (where) | |
0c133211 | 3210 | gfc_error ("Actual argument at %L to allocatable or " |
c4100eae | 3211 | "pointer dummy argument %qs must have a deferred " |
8d51f26f PT |
3212 | "length type parameter if and only if the dummy has one", |
3213 | &a->expr->where, f->sym->name); | |
f3e1097b | 3214 | return false; |
8d51f26f PT |
3215 | } |
3216 | ||
c49ea23d PT |
3217 | if (f->sym->ts.type == BT_CLASS) |
3218 | goto skip_size_check; | |
3219 | ||
37639728 TB |
3220 | actual_size = get_expr_storage_size (a->expr); |
3221 | formal_size = get_sym_storage_size (f->sym); | |
93302a24 JW |
3222 | if (actual_size != 0 && actual_size < formal_size |
3223 | && a->expr->ts.type != BT_PROCEDURE | |
3224 | && f->sym->attr.flavor != FL_PROCEDURE) | |
2d5b90b2 TB |
3225 | { |
3226 | if (a->expr->ts.type == BT_CHARACTER && !f->sym->as && where) | |
e0b9e5f9 | 3227 | gfc_warning (0, "Character length of actual argument shorter " |
48749dbc | 3228 | "than of dummy argument %qs (%lu/%lu) at %L", |
8d51f26f PT |
3229 | f->sym->name, actual_size, formal_size, |
3230 | &a->expr->where); | |
2d5b90b2 | 3231 | else if (where) |
37d92a7e DH |
3232 | { |
3233 | /* Emit a warning for -std=legacy and an error otherwise. */ | |
3234 | if (gfc_option.warn_std == 0) | |
e0b9e5f9 | 3235 | gfc_warning (0, "Actual argument contains too few " |
37d92a7e DH |
3236 | "elements for dummy argument %qs (%lu/%lu) " |
3237 | "at %L", f->sym->name, actual_size, | |
3238 | formal_size, &a->expr->where); | |
3239 | else | |
3240 | gfc_error_now ("Actual argument contains too few " | |
3241 | "elements for dummy argument %qs (%lu/%lu) " | |
3242 | "at %L", f->sym->name, actual_size, | |
3243 | formal_size, &a->expr->where); | |
3244 | } | |
f3e1097b | 3245 | return false; |
2d5b90b2 TB |
3246 | } |
3247 | ||
c49ea23d PT |
3248 | skip_size_check: |
3249 | ||
e9355cc3 JW |
3250 | /* Satisfy F03:12.4.1.3 by ensuring that a procedure pointer actual |
3251 | argument is provided for a procedure pointer formal argument. */ | |
8fb74da4 | 3252 | if (f->sym->attr.proc_pointer |
a7c0b11d | 3253 | && !((a->expr->expr_type == EXPR_VARIABLE |
4294c093 JW |
3254 | && (a->expr->symtree->n.sym->attr.proc_pointer |
3255 | || gfc_is_proc_ptr_comp (a->expr))) | |
a7c0b11d | 3256 | || (a->expr->expr_type == EXPR_FUNCTION |
4294c093 | 3257 | && is_procptr_result (a->expr)))) |
8fb74da4 JW |
3258 | { |
3259 | if (where) | |
c4100eae | 3260 | gfc_error ("Expected a procedure pointer for argument %qs at %L", |
8fb74da4 | 3261 | f->sym->name, &a->expr->where); |
f3e1097b | 3262 | return false; |
8fb74da4 JW |
3263 | } |
3264 | ||
e9355cc3 | 3265 | /* Satisfy F03:12.4.1.3 by ensuring that a procedure actual argument is |
699fa7aa | 3266 | provided for a procedure formal argument. */ |
e9355cc3 | 3267 | if (f->sym->attr.flavor == FL_PROCEDURE |
4294c093 JW |
3268 | && !((a->expr->expr_type == EXPR_VARIABLE |
3269 | && (a->expr->symtree->n.sym->attr.flavor == FL_PROCEDURE | |
3270 | || a->expr->symtree->n.sym->attr.proc_pointer | |
3271 | || gfc_is_proc_ptr_comp (a->expr))) | |
3272 | || (a->expr->expr_type == EXPR_FUNCTION | |
3273 | && is_procptr_result (a->expr)))) | |
699fa7aa | 3274 | { |
9914f8cf | 3275 | if (where) |
c4100eae | 3276 | gfc_error ("Expected a procedure for argument %qs at %L", |
9914f8cf | 3277 | f->sym->name, &a->expr->where); |
f3e1097b | 3278 | return false; |
699fa7aa PT |
3279 | } |
3280 | ||
b251af97 | 3281 | if (f->sym->as && f->sym->as->type == AS_ASSUMED_SHAPE |
bf9d2177 JJ |
3282 | && a->expr->expr_type == EXPR_VARIABLE |
3283 | && a->expr->symtree->n.sym->as | |
3284 | && a->expr->symtree->n.sym->as->type == AS_ASSUMED_SIZE | |
3285 | && (a->expr->ref == NULL | |
3286 | || (a->expr->ref->type == REF_ARRAY | |
3287 | && a->expr->ref->u.ar.type == AR_FULL))) | |
3288 | { | |
3289 | if (where) | |
c4100eae | 3290 | gfc_error ("Actual argument for %qs cannot be an assumed-size" |
bf9d2177 | 3291 | " array at %L", f->sym->name, where); |
f3e1097b | 3292 | return false; |
bf9d2177 JJ |
3293 | } |
3294 | ||
1600fe22 TS |
3295 | if (a->expr->expr_type != EXPR_NULL |
3296 | && compare_pointer (f->sym, a->expr) == 0) | |
6de9cd9a DN |
3297 | { |
3298 | if (where) | |
c4100eae | 3299 | gfc_error ("Actual argument for %qs must be a pointer at %L", |
6de9cd9a | 3300 | f->sym->name, &a->expr->where); |
f3e1097b | 3301 | return false; |
6de9cd9a DN |
3302 | } |
3303 | ||
7d54ef80 TB |
3304 | if (a->expr->expr_type != EXPR_NULL |
3305 | && (gfc_option.allow_std & GFC_STD_F2008) == 0 | |
3306 | && compare_pointer (f->sym, a->expr) == 2) | |
3307 | { | |
3308 | if (where) | |
3309 | gfc_error ("Fortran 2008: Non-pointer actual argument at %L to " | |
c4100eae | 3310 | "pointer dummy %qs", &a->expr->where,f->sym->name); |
f3e1097b | 3311 | return false; |
7d54ef80 | 3312 | } |
8b704316 | 3313 | |
7d54ef80 | 3314 | |
d3a9eea2 TB |
3315 | /* Fortran 2008, C1242. */ |
3316 | if (f->sym->attr.pointer && gfc_is_coindexed (a->expr)) | |
3317 | { | |
3318 | if (where) | |
3319 | gfc_error ("Coindexed actual argument at %L to pointer " | |
c4100eae | 3320 | "dummy %qs", |
d3a9eea2 | 3321 | &a->expr->where, f->sym->name); |
f3e1097b | 3322 | return false; |
d3a9eea2 TB |
3323 | } |
3324 | ||
3325 | /* Fortran 2008, 12.5.2.5 (no constraint). */ | |
3326 | if (a->expr->expr_type == EXPR_VARIABLE | |
3327 | && f->sym->attr.intent != INTENT_IN | |
3328 | && f->sym->attr.allocatable | |
3329 | && gfc_is_coindexed (a->expr)) | |
3330 | { | |
3331 | if (where) | |
3332 | gfc_error ("Coindexed actual argument at %L to allocatable " | |
c4100eae | 3333 | "dummy %qs requires INTENT(IN)", |
d3a9eea2 | 3334 | &a->expr->where, f->sym->name); |
f3e1097b | 3335 | return false; |
d3a9eea2 TB |
3336 | } |
3337 | ||
3338 | /* Fortran 2008, C1237. */ | |
3339 | if (a->expr->expr_type == EXPR_VARIABLE | |
3340 | && (f->sym->attr.asynchronous || f->sym->attr.volatile_) | |
3341 | && gfc_is_coindexed (a->expr) | |
3342 | && (a->expr->symtree->n.sym->attr.volatile_ | |
3343 | || a->expr->symtree->n.sym->attr.asynchronous)) | |
3344 | { | |
3345 | if (where) | |
3346 | gfc_error ("Coindexed ASYNCHRONOUS or VOLATILE actual argument at " | |
c4100eae | 3347 | "%L requires that dummy %qs has neither " |
d3a9eea2 TB |
3348 | "ASYNCHRONOUS nor VOLATILE", &a->expr->where, |
3349 | f->sym->name); | |
f3e1097b | 3350 | return false; |
d3a9eea2 TB |
3351 | } |
3352 | ||
3353 | /* Fortran 2008, 12.5.2.4 (no constraint). */ | |
3354 | if (a->expr->expr_type == EXPR_VARIABLE | |
3355 | && f->sym->attr.intent != INTENT_IN && !f->sym->attr.value | |
3356 | && gfc_is_coindexed (a->expr) | |
3357 | && gfc_has_ultimate_allocatable (a->expr)) | |
3358 | { | |
3359 | if (where) | |
3360 | gfc_error ("Coindexed actual argument at %L with allocatable " | |
c4100eae | 3361 | "ultimate component to dummy %qs requires either VALUE " |
d3a9eea2 | 3362 | "or INTENT(IN)", &a->expr->where, f->sym->name); |
f3e1097b | 3363 | return false; |
d3a9eea2 TB |
3364 | } |
3365 | ||
c49ea23d PT |
3366 | if (f->sym->ts.type == BT_CLASS |
3367 | && CLASS_DATA (f->sym)->attr.allocatable | |
3368 | && gfc_is_class_array_ref (a->expr, &full_array) | |
3369 | && !full_array) | |
3370 | { | |
3371 | if (where) | |
c4100eae | 3372 | gfc_error ("Actual CLASS array argument for %qs must be a full " |
c49ea23d | 3373 | "array at %L", f->sym->name, &a->expr->where); |
f3e1097b | 3374 | return false; |
c49ea23d PT |
3375 | } |
3376 | ||
3377 | ||
aa08038d | 3378 | if (a->expr->expr_type != EXPR_NULL |
f3e1097b | 3379 | && !compare_allocatable (f->sym, a->expr)) |
aa08038d EE |
3380 | { |
3381 | if (where) | |
c4100eae | 3382 | gfc_error ("Actual argument for %qs must be ALLOCATABLE at %L", |
aa08038d | 3383 | f->sym->name, &a->expr->where); |
f3e1097b | 3384 | return false; |
aa08038d EE |
3385 | } |
3386 | ||
a920e94a | 3387 | /* Check intent = OUT/INOUT for definable actual argument. */ |
f3883269 SK |
3388 | if (!in_statement_function |
3389 | && (f->sym->attr.intent == INTENT_OUT | |
3390 | || f->sym->attr.intent == INTENT_INOUT)) | |
a920e94a | 3391 | { |
8c91ab34 DK |
3392 | const char* context = (where |
3393 | ? _("actual argument to INTENT = OUT/INOUT") | |
3394 | : NULL); | |
a920e94a | 3395 | |
bcb4ad36 TB |
3396 | if (((f->sym->ts.type == BT_CLASS && f->sym->attr.class_ok |
3397 | && CLASS_DATA (f->sym)->attr.class_pointer) | |
3398 | || (f->sym->ts.type != BT_CLASS && f->sym->attr.pointer)) | |
524af0d6 | 3399 | && !gfc_check_vardef_context (a->expr, true, false, false, context)) |
f3e1097b | 3400 | return false; |
524af0d6 | 3401 | if (!gfc_check_vardef_context (a->expr, false, false, false, context)) |
f3e1097b | 3402 | return false; |
ee7e677f TB |
3403 | } |
3404 | ||
59be8071 TB |
3405 | if ((f->sym->attr.intent == INTENT_OUT |
3406 | || f->sym->attr.intent == INTENT_INOUT | |
84efddb2 DF |
3407 | || f->sym->attr.volatile_ |
3408 | || f->sym->attr.asynchronous) | |
03af1e4c | 3409 | && gfc_has_vector_subscript (a->expr)) |
59be8071 TB |
3410 | { |
3411 | if (where) | |
84efddb2 DF |
3412 | gfc_error ("Array-section actual argument with vector " |
3413 | "subscripts at %L is incompatible with INTENT(OUT), " | |
3414 | "INTENT(INOUT), VOLATILE or ASYNCHRONOUS attribute " | |
c4100eae | 3415 | "of the dummy argument %qs", |
59be8071 | 3416 | &a->expr->where, f->sym->name); |
f3e1097b | 3417 | return false; |
59be8071 TB |
3418 | } |
3419 | ||
9bce3c1c TB |
3420 | /* C1232 (R1221) For an actual argument which is an array section or |
3421 | an assumed-shape array, the dummy argument shall be an assumed- | |
3422 | shape array, if the dummy argument has the VOLATILE attribute. */ | |
3423 | ||
3424 | if (f->sym->attr.volatile_ | |
271dd55c | 3425 | && a->expr->expr_type == EXPR_VARIABLE |
9bce3c1c TB |
3426 | && a->expr->symtree->n.sym->as |
3427 | && a->expr->symtree->n.sym->as->type == AS_ASSUMED_SHAPE | |
3428 | && !(f->sym->as && f->sym->as->type == AS_ASSUMED_SHAPE)) | |
3429 | { | |
3430 | if (where) | |
3431 | gfc_error ("Assumed-shape actual argument at %L is " | |
3432 | "incompatible with the non-assumed-shape " | |
c4100eae | 3433 | "dummy argument %qs due to VOLATILE attribute", |
9bce3c1c | 3434 | &a->expr->where,f->sym->name); |
f3e1097b | 3435 | return false; |
9bce3c1c TB |
3436 | } |
3437 | ||
eb401400 AV |
3438 | /* Find the last array_ref. */ |
3439 | actual_arr_ref = NULL; | |
3440 | if (a->expr->ref) | |
3441 | actual_arr_ref = gfc_find_array_ref (a->expr, true); | |
3442 | ||
9bce3c1c | 3443 | if (f->sym->attr.volatile_ |
eb401400 | 3444 | && actual_arr_ref && actual_arr_ref->type == AR_SECTION |
9bce3c1c TB |
3445 | && !(f->sym->as && f->sym->as->type == AS_ASSUMED_SHAPE)) |
3446 | { | |
3447 | if (where) | |
3448 | gfc_error ("Array-section actual argument at %L is " | |
3449 | "incompatible with the non-assumed-shape " | |
c4100eae | 3450 | "dummy argument %qs due to VOLATILE attribute", |
eb401400 | 3451 | &a->expr->where, f->sym->name); |
f3e1097b | 3452 | return false; |
9bce3c1c TB |
3453 | } |
3454 | ||
3455 | /* C1233 (R1221) For an actual argument which is a pointer array, the | |
3456 | dummy argument shall be an assumed-shape or pointer array, if the | |
3457 | dummy argument has the VOLATILE attribute. */ | |
3458 | ||
3459 | if (f->sym->attr.volatile_ | |
271dd55c | 3460 | && a->expr->expr_type == EXPR_VARIABLE |
9bce3c1c TB |
3461 | && a->expr->symtree->n.sym->attr.pointer |
3462 | && a->expr->symtree->n.sym->as | |
3463 | && !(f->sym->as | |
3464 | && (f->sym->as->type == AS_ASSUMED_SHAPE | |
3465 | || f->sym->attr.pointer))) | |
3466 | { | |
3467 | if (where) | |
3468 | gfc_error ("Pointer-array actual argument at %L requires " | |
3469 | "an assumed-shape or pointer-array dummy " | |
c4100eae | 3470 | "argument %qs due to VOLATILE attribute", |
9bce3c1c | 3471 | &a->expr->where,f->sym->name); |
f3e1097b | 3472 | return false; |
9bce3c1c TB |
3473 | } |
3474 | ||
6de9cd9a DN |
3475 | match: |
3476 | if (a == actual) | |
3477 | na = i; | |
3478 | ||
7b901ac4 | 3479 | new_arg[i++] = a; |
6de9cd9a DN |
3480 | } |
3481 | ||
3482 | /* Make sure missing actual arguments are optional. */ | |
3483 | i = 0; | |
3484 | for (f = formal; f; f = f->next, i++) | |
3485 | { | |
7b901ac4 | 3486 | if (new_arg[i] != NULL) |
6de9cd9a | 3487 | continue; |
3ab7b3de BM |
3488 | if (f->sym == NULL) |
3489 | { | |
3490 | if (where) | |
b251af97 SK |
3491 | gfc_error ("Missing alternate return spec in subroutine call " |
3492 | "at %L", where); | |
f3e1097b | 3493 | return false; |
3ab7b3de | 3494 | } |
f3883269 SK |
3495 | if (!f->sym->attr.optional |
3496 | || (in_statement_function && f->sym->attr.optional)) | |
6de9cd9a DN |
3497 | { |
3498 | if (where) | |
c4100eae | 3499 | gfc_error ("Missing actual argument for argument %qs at %L", |
6de9cd9a | 3500 | f->sym->name, where); |
f3e1097b | 3501 | return false; |
6de9cd9a DN |
3502 | } |
3503 | } | |
3504 | ||
3505 | /* The argument lists are compatible. We now relink a new actual | |
3506 | argument list with null arguments in the right places. The head | |
3507 | of the list remains the head. */ | |
3508 | for (i = 0; i < n; i++) | |
7b901ac4 KG |
3509 | if (new_arg[i] == NULL) |
3510 | new_arg[i] = gfc_get_actual_arglist (); | |
6de9cd9a DN |
3511 | |
3512 | if (na != 0) | |
3513 | { | |
fab27f52 MM |
3514 | std::swap (*new_arg[0], *actual); |
3515 | std::swap (new_arg[0], new_arg[na]); | |
6de9cd9a DN |
3516 | } |
3517 | ||
3518 | for (i = 0; i < n - 1; i++) | |
7b901ac4 | 3519 | new_arg[i]->next = new_arg[i + 1]; |
6de9cd9a | 3520 | |
7b901ac4 | 3521 | new_arg[i]->next = NULL; |
6de9cd9a DN |
3522 | |
3523 | if (*ap == NULL && n > 0) | |
7b901ac4 | 3524 | *ap = new_arg[0]; |
6de9cd9a | 3525 | |
1600fe22 | 3526 | /* Note the types of omitted optional arguments. */ |
b5ca4fd2 | 3527 | for (a = *ap, f = formal; a; a = a->next, f = f->next) |
1600fe22 TS |
3528 | if (a->expr == NULL && a->label == NULL) |
3529 | a->missing_arg_type = f->sym->ts.type; | |
3530 | ||
f3e1097b | 3531 | return true; |
6de9cd9a DN |
3532 | } |
3533 | ||
3534 | ||
3535 | typedef struct | |
3536 | { | |
3537 | gfc_formal_arglist *f; | |
3538 | gfc_actual_arglist *a; | |
3539 | } | |
3540 | argpair; | |
3541 | ||
3542 | /* qsort comparison function for argument pairs, with the following | |
3543 | order: | |
3544 | - p->a->expr == NULL | |
3545 | - p->a->expr->expr_type != EXPR_VARIABLE | |
c5014982 | 3546 | - by gfc_symbol pointer value (larger first). */ |
6de9cd9a DN |
3547 | |
3548 | static int | |
3549 | pair_cmp (const void *p1, const void *p2) | |
3550 | { | |
3551 | const gfc_actual_arglist *a1, *a2; | |
3552 | ||
3553 | /* *p1 and *p2 are elements of the to-be-sorted array. */ | |
3554 | a1 = ((const argpair *) p1)->a; | |
3555 | a2 = ((const argpair *) p2)->a; | |
3556 | if (!a1->expr) | |
3557 | { | |
3558 | if (!a2->expr) | |
3559 | return 0; | |
3560 | return -1; | |
3561 | } | |
3562 | if (!a2->expr) | |
3563 | return 1; | |
3564 | if (a1->expr->expr_type != EXPR_VARIABLE) | |
3565 | { | |
3566 | if (a2->expr->expr_type != EXPR_VARIABLE) | |
3567 | return 0; | |
3568 | return -1; | |
3569 | } | |
3570 | if (a2->expr->expr_type != EXPR_VARIABLE) | |
3571 | return 1; | |
c5014982 AM |
3572 | if (a1->expr->symtree->n.sym > a2->expr->symtree->n.sym) |
3573 | return -1; | |
6de9cd9a DN |
3574 | return a1->expr->symtree->n.sym < a2->expr->symtree->n.sym; |
3575 | } | |
3576 | ||
3577 | ||
3578 | /* Given two expressions from some actual arguments, test whether they | |
3579 | refer to the same expression. The analysis is conservative. | |
524af0d6 | 3580 | Returning false will produce no warning. */ |
6de9cd9a | 3581 | |
524af0d6 | 3582 | static bool |
b251af97 | 3583 | compare_actual_expr (gfc_expr *e1, gfc_expr *e2) |
6de9cd9a DN |
3584 | { |
3585 | const gfc_ref *r1, *r2; | |
3586 | ||
3587 | if (!e1 || !e2 | |
3588 | || e1->expr_type != EXPR_VARIABLE | |
3589 | || e2->expr_type != EXPR_VARIABLE | |
3590 | || e1->symtree->n.sym != e2->symtree->n.sym) | |
524af0d6 | 3591 | return false; |
6de9cd9a DN |
3592 | |
3593 | /* TODO: improve comparison, see expr.c:show_ref(). */ | |
3594 | for (r1 = e1->ref, r2 = e2->ref; r1 && r2; r1 = r1->next, r2 = r2->next) | |
3595 | { | |
3596 | if (r1->type != r2->type) | |
524af0d6 | 3597 | return false; |
6de9cd9a DN |
3598 | switch (r1->type) |
3599 | { | |
3600 | case REF_ARRAY: | |
3601 | if (r1->u.ar.type != r2->u.ar.type) | |
524af0d6 | 3602 | return false; |
6de9cd9a DN |
3603 | /* TODO: At the moment, consider only full arrays; |
3604 | we could do better. */ | |
3605 | if (r1->u.ar.type != AR_FULL || r2->u.ar.type != AR_FULL) | |
524af0d6 | 3606 | return false; |
6de9cd9a DN |
3607 | break; |
3608 | ||
3609 | case REF_COMPONENT: | |
3610 | if (r1->u.c.component != r2->u.c.component) | |
524af0d6 | 3611 | return false; |
6de9cd9a DN |
3612 | break; |
3613 | ||
3614 | case REF_SUBSTRING: | |
524af0d6 | 3615 | return false; |
6de9cd9a | 3616 | |
f16be16d SK |
3617 | case REF_INQUIRY: |
3618 | if (e1->symtree->n.sym->ts.type == BT_COMPLEX | |
3619 | && e1->ts.type == BT_REAL && e2->ts.type == BT_REAL | |
3620 | && r1->u.i != r2->u.i) | |
3621 | return false; | |
3622 | break; | |
3623 | ||
6de9cd9a DN |
3624 | default: |
3625 | gfc_internal_error ("compare_actual_expr(): Bad component code"); | |
3626 | } | |
3627 | } | |
3628 | if (!r1 && !r2) | |
524af0d6 JB |
3629 | return true; |
3630 | return false; | |
6de9cd9a DN |
3631 | } |
3632 | ||
b251af97 | 3633 | |
6de9cd9a DN |
3634 | /* Given formal and actual argument lists that correspond to one |
3635 | another, check that identical actual arguments aren't not | |
3636 | associated with some incompatible INTENTs. */ | |
3637 | ||
524af0d6 | 3638 | static bool |
b251af97 | 3639 | check_some_aliasing (gfc_formal_arglist *f, gfc_actual_arglist *a) |
6de9cd9a DN |
3640 | { |
3641 | sym_intent f1_intent, f2_intent; | |
3642 | gfc_formal_arglist *f1; | |
3643 | gfc_actual_arglist *a1; | |
3644 | size_t n, i, j; | |
3645 | argpair *p; | |
524af0d6 | 3646 | bool t = true; |
6de9cd9a DN |
3647 | |
3648 | n = 0; | |
3649 | for (f1 = f, a1 = a;; f1 = f1->next, a1 = a1->next) | |
3650 | { | |
3651 | if (f1 == NULL && a1 == NULL) | |
3652 | break; | |
3653 | if (f1 == NULL || a1 == NULL) | |
3654 | gfc_internal_error ("check_some_aliasing(): List mismatch"); | |
3655 | n++; | |
3656 | } | |
3657 | if (n == 0) | |
3658 | return t; | |
1145e690 | 3659 | p = XALLOCAVEC (argpair, n); |
6de9cd9a DN |
3660 | |
3661 | for (i = 0, f1 = f, a1 = a; i < n; i++, f1 = f1->next, a1 = a1->next) | |
3662 | { | |
3663 | p[i].f = f1; | |
3664 | p[i].a = a1; | |
3665 | } | |
3666 | ||
3667 | qsort (p, n, sizeof (argpair), pair_cmp); | |
3668 | ||
3669 | for (i = 0; i < n; i++) | |
3670 | { | |
3671 | if (!p[i].a->expr | |
3672 | || p[i].a->expr->expr_type != EXPR_VARIABLE | |
3673 | || p[i].a->expr->ts.type == BT_PROCEDURE) | |
3674 | continue; | |
3675 | f1_intent = p[i].f->sym->attr.intent; | |
3676 | for (j = i + 1; j < n; j++) | |
3677 | { | |
3678 | /* Expected order after the sort. */ | |
3679 | if (!p[j].a->expr || p[j].a->expr->expr_type != EXPR_VARIABLE) | |
3680 | gfc_internal_error ("check_some_aliasing(): corrupted data"); | |
3681 | ||
3682 | /* Are the expression the same? */ | |
524af0d6 | 3683 | if (!compare_actual_expr (p[i].a->expr, p[j].a->expr)) |
6de9cd9a DN |
3684 | break; |
3685 | f2_intent = p[j].f->sym->attr.intent; | |
3686 | if ((f1_intent == INTENT_IN && f2_intent == INTENT_OUT) | |
9f1930be TB |
3687 | || (f1_intent == INTENT_OUT && f2_intent == INTENT_IN) |
3688 | || (f1_intent == INTENT_OUT && f2_intent == INTENT_OUT)) | |
6de9cd9a | 3689 | { |
db30e21c | 3690 | gfc_warning (0, "Same actual argument associated with INTENT(%s) " |
48749dbc | 3691 | "argument %qs and INTENT(%s) argument %qs at %L", |
6de9cd9a DN |
3692 | gfc_intent_string (f1_intent), p[i].f->sym->name, |
3693 | gfc_intent_string (f2_intent), p[j].f->sym->name, | |
3694 | &p[i].a->expr->where); | |
524af0d6 | 3695 | t = false; |
6de9cd9a DN |
3696 | } |
3697 | } | |
3698 | } | |
3699 | ||
3700 | return t; | |
3701 | } | |
3702 | ||
3703 | ||
3704 | /* Given formal and actual argument lists that correspond to one | |
3705 | another, check that they are compatible in the sense that intents | |
3706 | are not mismatched. */ | |
3707 | ||
524af0d6 | 3708 | static bool |
b251af97 | 3709 | check_intents (gfc_formal_arglist *f, gfc_actual_arglist *a) |
6de9cd9a | 3710 | { |
f17facac | 3711 | sym_intent f_intent; |
6de9cd9a DN |
3712 | |
3713 | for (;; f = f->next, a = a->next) | |
3714 | { | |
99c39534 TB |
3715 | gfc_expr *expr; |
3716 | ||
6de9cd9a DN |
3717 | if (f == NULL && a == NULL) |
3718 | break; | |
3719 | if (f == NULL || a == NULL) | |
3720 | gfc_internal_error ("check_intents(): List mismatch"); | |
3721 | ||
99c39534 TB |
3722 | if (a->expr && a->expr->expr_type == EXPR_FUNCTION |
3723 | && a->expr->value.function.isym | |
3724 | && a->expr->value.function.isym->id == GFC_ISYM_CAF_GET) | |
3725 | expr = a->expr->value.function.actual->expr; | |
3726 | else | |
3727 | expr = a->expr; | |
3728 | ||
3729 | if (expr == NULL || expr->expr_type != EXPR_VARIABLE) | |
6de9cd9a DN |
3730 | continue; |
3731 | ||
6de9cd9a DN |
3732 | f_intent = f->sym->attr.intent; |
3733 | ||
99c39534 | 3734 | if (gfc_pure (NULL) && gfc_impure_variable (expr->symtree->n.sym)) |
6de9cd9a | 3735 | { |
bcb4ad36 TB |
3736 | if ((f->sym->ts.type == BT_CLASS && f->sym->attr.class_ok |
3737 | && CLASS_DATA (f->sym)->attr.class_pointer) | |
3738 | || (f->sym->ts.type != BT_CLASS && f->sym->attr.pointer)) | |
6de9cd9a | 3739 | { |
b251af97 SK |
3740 | gfc_error ("Procedure argument at %L is local to a PURE " |
3741 | "procedure and has the POINTER attribute", | |
99c39534 | 3742 | &expr->where); |
524af0d6 | 3743 | return false; |
6de9cd9a DN |
3744 | } |
3745 | } | |
d3a9eea2 TB |
3746 | |
3747 | /* Fortran 2008, C1283. */ | |
99c39534 | 3748 | if (gfc_pure (NULL) && gfc_is_coindexed (expr)) |
d3a9eea2 TB |
3749 | { |
3750 | if (f_intent == INTENT_INOUT || f_intent == INTENT_OUT) | |
3751 | { | |
3752 | gfc_error ("Coindexed actual argument at %L in PURE procedure " | |
3753 | "is passed to an INTENT(%s) argument", | |
99c39534 | 3754 | &expr->where, gfc_intent_string (f_intent)); |
524af0d6 | 3755 | return false; |
d3a9eea2 TB |
3756 | } |
3757 | ||
bcb4ad36 TB |
3758 | if ((f->sym->ts.type == BT_CLASS && f->sym->attr.class_ok |
3759 | && CLASS_DATA (f->sym)->attr.class_pointer) | |
3760 | || (f->sym->ts.type != BT_CLASS && f->sym->attr.pointer)) | |
d3a9eea2 TB |
3761 | { |
3762 | gfc_error ("Coindexed actual argument at %L in PURE procedure " | |
3763 | "is passed to a POINTER dummy argument", | |
99c39534 | 3764 | &expr->where); |
524af0d6 | 3765 | return false; |
d3a9eea2 TB |
3766 | } |
3767 | } | |
3768 | ||
3769 | /* F2008, Section 12.5.2.4. */ | |
99c39534 TB |
3770 | if (expr->ts.type == BT_CLASS && f->sym->ts.type == BT_CLASS |
3771 | && gfc_is_coindexed (expr)) | |
d3a9eea2 TB |
3772 | { |
3773 | gfc_error ("Coindexed polymorphic actual argument at %L is passed " | |
c4100eae | 3774 | "polymorphic dummy argument %qs", |
99c39534 | 3775 | &expr->where, f->sym->name); |
524af0d6 | 3776 | return false; |
d3a9eea2 | 3777 | } |
6de9cd9a DN |
3778 | } |
3779 | ||
524af0d6 | 3780 | return true; |
6de9cd9a DN |
3781 | } |
3782 | ||
3783 | ||
3784 | /* Check how a procedure is used against its interface. If all goes | |
3785 | well, the actual argument list will also end up being properly | |
3786 | sorted. */ | |
3787 | ||
524af0d6 | 3788 | bool |
b251af97 | 3789 | gfc_procedure_use (gfc_symbol *sym, gfc_actual_arglist **ap, locus *where) |
6de9cd9a | 3790 | { |
f3883269 | 3791 | gfc_actual_arglist *a; |
4cbc9039 | 3792 | gfc_formal_arglist *dummy_args; |
4a4fc7fe | 3793 | bool implicit = false; |
4cbc9039 | 3794 | |
a9c5fe7e | 3795 | /* Warn about calls with an implicit interface. Special case |
6bd2c800 | 3796 | for calling a ISO_C_BINDING because c_loc and c_funloc |
ca071303 FXC |
3797 | are pseudo-unknown. Additionally, warn about procedures not |
3798 | explicitly declared at all if requested. */ | |
8b7a967e | 3799 | if (sym->attr.if_source == IFSRC_UNKNOWN && !sym->attr.is_iso_c) |
ca071303 | 3800 | { |
b31f8023 | 3801 | bool has_implicit_none_export = false; |
4a4fc7fe | 3802 | implicit = true; |
b31f8023 TB |
3803 | if (sym->attr.proc == PROC_UNKNOWN) |
3804 | for (gfc_namespace *ns = sym->ns; ns; ns = ns->parent) | |
3805 | if (ns->has_implicit_none_export) | |
3806 | { | |
3807 | has_implicit_none_export = true; | |
3808 | break; | |
3809 | } | |
3810 | if (has_implicit_none_export) | |
8b7a967e | 3811 | { |
bcc478b9 BRF |
3812 | const char *guessed |
3813 | = gfc_lookup_function_fuzzy (sym->name, sym->ns->sym_root); | |
3814 | if (guessed) | |
3815 | gfc_error ("Procedure %qs called at %L is not explicitly declared" | |
3816 | "; did you mean %qs?", | |
3817 | sym->name, where, guessed); | |
3818 | else | |
3819 | gfc_error ("Procedure %qs called at %L is not explicitly declared", | |
3820 | sym->name, where); | |
8b7a967e TB |
3821 | return false; |
3822 | } | |
73e42eef | 3823 | if (warn_implicit_interface) |
48749dbc MLI |
3824 | gfc_warning (OPT_Wimplicit_interface, |
3825 | "Procedure %qs called with an implicit interface at %L", | |
ca071303 | 3826 | sym->name, where); |
73e42eef | 3827 | else if (warn_implicit_procedure && sym->attr.proc == PROC_UNKNOWN) |
48749dbc MLI |
3828 | gfc_warning (OPT_Wimplicit_procedure, |
3829 | "Procedure %qs called at %L is not explicitly declared", | |
ca071303 | 3830 | sym->name, where); |
ffeebc4f | 3831 | gfc_find_proc_namespace (sym->ns)->implicit_interface_calls = 1; |
ca071303 | 3832 | } |
6de9cd9a | 3833 | |
e6895430 | 3834 | if (sym->attr.if_source == IFSRC_UNKNOWN) |
ac05557c | 3835 | { |
86d7449c TB |
3836 | if (sym->attr.pointer) |
3837 | { | |
c4100eae MLI |
3838 | gfc_error ("The pointer object %qs at %L must have an explicit " |
3839 | "function interface or be declared as array", | |
3840 | sym->name, where); | |
524af0d6 | 3841 | return false; |
86d7449c TB |
3842 | } |
3843 | ||
3844 | if (sym->attr.allocatable && !sym->attr.external) | |
3845 | { | |
c4100eae MLI |
3846 | gfc_error ("The allocatable object %qs at %L must have an explicit " |
3847 | "function interface or be declared as array", | |
3848 | sym->name, where); | |
524af0d6 | 3849 | return false; |
86d7449c TB |
3850 | } |
3851 | ||
3852 | if (sym->attr.allocatable) | |
3853 | { | |
c4100eae MLI |
3854 | gfc_error ("Allocatable function %qs at %L must have an explicit " |
3855 | "function interface", sym->name, where); | |
524af0d6 | 3856 | return false; |
86d7449c TB |
3857 | } |
3858 | ||
ac05557c DF |
3859 | for (a = *ap; a; a = a->next) |
3860 | { | |
fb078366 TK |
3861 | if (a->expr && a->expr->error) |
3862 | return false; | |
3863 | ||
4a4fc7fe TK |
3864 | /* F2018, 15.4.2.2 Explicit interface is required for a |
3865 | polymorphic dummy argument, so there is no way to | |
3866 | legally have a class appear in an argument with an | |
3867 | implicit interface. */ | |
3868 | ||
3869 | if (implicit && a->expr && a->expr->ts.type == BT_CLASS) | |
3870 | { | |
3871 | gfc_error ("Explicit interface required for polymorphic " | |
3872 | "argument at %L",&a->expr->where); | |
3873 | a->expr->error = 1; | |
3874 | break; | |
3875 | } | |
3876 | ||
ac05557c DF |
3877 | /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */ |
3878 | if (a->name != NULL && a->name[0] != '%') | |
3879 | { | |
c4100eae MLI |
3880 | gfc_error ("Keyword argument requires explicit interface " |
3881 | "for procedure %qs at %L", sym->name, &a->expr->where); | |
ac05557c DF |
3882 | break; |
3883 | } | |
fea54935 | 3884 | |
45a69325 TB |
3885 | /* TS 29113, 6.2. */ |
3886 | if (a->expr && a->expr->ts.type == BT_ASSUMED | |
3887 | && sym->intmod_sym_id != ISOCBINDING_LOC) | |
3888 | { | |
3889 | gfc_error ("Assumed-type argument %s at %L requires an explicit " | |
3890 | "interface", a->expr->symtree->n.sym->name, | |
3891 | &a->expr->where); | |
fb078366 | 3892 | a->expr->error = 1; |
45a69325 TB |
3893 | break; |
3894 | } | |
3895 | ||
fea54935 TB |
3896 | /* F2008, C1303 and C1304. */ |
3897 | if (a->expr | |
3898 | && (a->expr->ts.type == BT_DERIVED || a->expr->ts.type == BT_CLASS) | |
f477062c | 3899 | && a->expr->ts.u.derived |
fea54935 TB |
3900 | && ((a->expr->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV |
3901 | && a->expr->ts.u.derived->intmod_sym_id == ISOFORTRAN_LOCK_TYPE) | |
3902 | || gfc_expr_attr (a->expr).lock_comp)) | |
3903 | { | |
c4100eae MLI |
3904 | gfc_error ("Actual argument of LOCK_TYPE or with LOCK_TYPE " |
3905 | "component at %L requires an explicit interface for " | |
3906 | "procedure %qs", &a->expr->where, sym->name); | |
fb078366 | 3907 | a->expr->error = 1; |
fea54935 TB |
3908 | break; |
3909 | } | |
ea8ad3e5 | 3910 | |
5df445a2 TB |
3911 | if (a->expr |
3912 | && (a->expr->ts.type == BT_DERIVED || a->expr->ts.type == BT_CLASS) | |
f477062c | 3913 | && a->expr->ts.u.derived |
5df445a2 TB |
3914 | && ((a->expr->ts.u.derived->from_intmod == INTMOD_ISO_FORTRAN_ENV |
3915 | && a->expr->ts.u.derived->intmod_sym_id | |
3916 | == ISOFORTRAN_EVENT_TYPE) | |
3917 | || gfc_expr_attr (a->expr).event_comp)) | |
3918 | { | |
3919 | gfc_error ("Actual argument of EVENT_TYPE or with EVENT_TYPE " | |
3920 | "component at %L requires an explicit interface for " | |
3921 | "procedure %qs", &a->expr->where, sym->name); | |
fb078366 | 3922 | a->expr->error = 1; |
5df445a2 TB |
3923 | break; |
3924 | } | |
3925 | ||
ea8ad3e5 TB |
3926 | if (a->expr && a->expr->expr_type == EXPR_NULL |
3927 | && a->expr->ts.type == BT_UNKNOWN) | |
3928 | { | |
fb078366 TK |
3929 | gfc_error ("MOLD argument to NULL required at %L", |
3930 | &a->expr->where); | |
3931 | a->expr->error = 1; | |
524af0d6 | 3932 | return false; |
ea8ad3e5 | 3933 | } |
c62c6622 TB |
3934 | |
3935 | /* TS 29113, C407b. */ | |
3936 | if (a->expr && a->expr->expr_type == EXPR_VARIABLE | |
3937 | && symbol_rank (a->expr->symtree->n.sym) == -1) | |
3938 | { | |
3939 | gfc_error ("Assumed-rank argument requires an explicit interface " | |
3940 | "at %L", &a->expr->where); | |
fb078366 | 3941 | a->expr->error = 1; |
524af0d6 | 3942 | return false; |
c62c6622 | 3943 | } |
ac05557c DF |
3944 | } |
3945 | ||
524af0d6 | 3946 | return true; |
ac05557c DF |
3947 | } |
3948 | ||
4cbc9039 JW |
3949 | dummy_args = gfc_sym_get_dummy_args (sym); |
3950 | ||
f3883269 SK |
3951 | /* For a statement function, check that types and type parameters of actual |
3952 | arguments and dummy arguments match. */ | |
e68a35ae TK |
3953 | if (!gfc_compare_actual_formal (ap, dummy_args, 0, sym->attr.elemental, |
3954 | sym->attr.proc == PROC_ST_FUNCTION, where)) | |
524af0d6 | 3955 | return false; |
f3883269 | 3956 | |
524af0d6 JB |
3957 | if (!check_intents (dummy_args, *ap)) |
3958 | return false; | |
6de9cd9a | 3959 | |
73e42eef | 3960 | if (warn_aliasing) |
4cbc9039 | 3961 | check_some_aliasing (dummy_args, *ap); |
f8552cd4 | 3962 | |
524af0d6 | 3963 | return true; |
6de9cd9a DN |
3964 | } |
3965 | ||
3966 | ||
7e196f89 JW |
3967 | /* Check how a procedure pointer component is used against its interface. |
3968 | If all goes well, the actual argument list will also end up being properly | |
3969 | sorted. Completely analogous to gfc_procedure_use. */ | |
3970 | ||
3971 | void | |
3972 | gfc_ppc_use (gfc_component *comp, gfc_actual_arglist **ap, locus *where) | |
3973 | { | |
7e196f89 | 3974 | /* Warn about calls with an implicit interface. Special case |
6bd2c800 | 3975 | for calling a ISO_C_BINDING because c_loc and c_funloc |
7e196f89 | 3976 | are pseudo-unknown. */ |
73e42eef | 3977 | if (warn_implicit_interface |
7e196f89 JW |
3978 | && comp->attr.if_source == IFSRC_UNKNOWN |
3979 | && !comp->attr.is_iso_c) | |
48749dbc MLI |
3980 | gfc_warning (OPT_Wimplicit_interface, |
3981 | "Procedure pointer component %qs called with an implicit " | |
7e196f89 JW |
3982 | "interface at %L", comp->name, where); |
3983 | ||
3984 | if (comp->attr.if_source == IFSRC_UNKNOWN) | |
3985 | { | |
3986 | gfc_actual_arglist *a; | |
3987 | for (a = *ap; a; a = a->next) | |
3988 | { | |
3989 | /* Skip g77 keyword extensions like %VAL, %REF, %LOC. */ | |
3990 | if (a->name != NULL && a->name[0] != '%') | |
3991 | { | |
c4100eae MLI |
3992 | gfc_error ("Keyword argument requires explicit interface " |
3993 | "for procedure pointer component %qs at %L", | |
3994 | comp->name, &a->expr->where); | |
7e196f89 JW |
3995 | break; |
3996 | } | |
3997 | } | |
3998 | ||
3999 | return; | |
4000 | } | |
4001 | ||
e68a35ae | 4002 | if (!gfc_compare_actual_formal (ap, comp->ts.interface->formal, 0, |
f3883269 | 4003 | comp->attr.elemental, false, where)) |
7e196f89 JW |
4004 | return; |
4005 | ||
4cbc9039 | 4006 | check_intents (comp->ts.interface->formal, *ap); |
73e42eef | 4007 | if (warn_aliasing) |
4cbc9039 | 4008 | check_some_aliasing (comp->ts.interface->formal, *ap); |
7e196f89 JW |
4009 | } |
4010 | ||
4011 | ||
f0ac18b7 DK |
4012 | /* Try if an actual argument list matches the formal list of a symbol, |
4013 | respecting the symbol's attributes like ELEMENTAL. This is used for | |
4014 | GENERIC resolution. */ | |
4015 | ||
4016 | bool | |
4017 | gfc_arglist_matches_symbol (gfc_actual_arglist** args, gfc_symbol* sym) | |
4018 | { | |
4cbc9039 | 4019 | gfc_formal_arglist *dummy_args; |
f0ac18b7 DK |
4020 | bool r; |
4021 | ||
1d101216 JD |
4022 | if (sym->attr.flavor != FL_PROCEDURE) |
4023 | return false; | |
f0ac18b7 | 4024 | |
4cbc9039 JW |
4025 | dummy_args = gfc_sym_get_dummy_args (sym); |
4026 | ||
f0ac18b7 | 4027 | r = !sym->attr.elemental; |
e68a35ae | 4028 | if (gfc_compare_actual_formal (args, dummy_args, r, !r, false, NULL)) |
f0ac18b7 | 4029 | { |
4cbc9039 | 4030 | check_intents (dummy_args, *args); |
73e42eef | 4031 | if (warn_aliasing) |
4cbc9039 | 4032 | check_some_aliasing (dummy_args, *args); |
f0ac18b7 DK |
4033 | return true; |
4034 | } | |
4035 | ||
4036 | return false; | |
4037 | } | |
4038 | ||
4039 | ||
6de9cd9a DN |
4040 | /* Given an interface pointer and an actual argument list, search for |
4041 | a formal argument list that matches the actual. If found, returns | |
4042 | a pointer to the symbol of the correct interface. Returns NULL if | |
4043 | not found. */ | |
4044 | ||
4045 | gfc_symbol * | |
b251af97 SK |
4046 | gfc_search_interface (gfc_interface *intr, int sub_flag, |
4047 | gfc_actual_arglist **ap) | |
6de9cd9a | 4048 | { |
22a0a780 | 4049 | gfc_symbol *elem_sym = NULL; |
ea8ad3e5 TB |
4050 | gfc_symbol *null_sym = NULL; |
4051 | locus null_expr_loc; | |
4052 | gfc_actual_arglist *a; | |
4053 | bool has_null_arg = false; | |
4054 | ||
4055 | for (a = *ap; a; a = a->next) | |
4056 | if (a->expr && a->expr->expr_type == EXPR_NULL | |
4057 | && a->expr->ts.type == BT_UNKNOWN) | |
4058 | { | |
4059 | has_null_arg = true; | |
4060 | null_expr_loc = a->expr->where; | |
4061 | break; | |
8b704316 | 4062 | } |
ea8ad3e5 | 4063 | |
6de9cd9a DN |
4064 | for (; intr; intr = intr->next) |
4065 | { | |
f6288c24 | 4066 | if (gfc_fl_struct (intr->sym->attr.flavor)) |
c3f34952 | 4067 | continue; |
6de9cd9a DN |
4068 | if (sub_flag && intr->sym->attr.function) |
4069 | continue; | |
4070 | if (!sub_flag && intr->sym->attr.subroutine) | |
4071 | continue; | |
4072 | ||
f0ac18b7 | 4073 | if (gfc_arglist_matches_symbol (ap, intr->sym)) |
22a0a780 | 4074 | { |
ea8ad3e5 TB |
4075 | if (has_null_arg && null_sym) |
4076 | { | |
4077 | gfc_error ("MOLD= required in NULL() argument at %L: Ambiguity " | |
4078 | "between specific functions %s and %s", | |
4079 | &null_expr_loc, null_sym->name, intr->sym->name); | |
4080 | return NULL; | |
4081 | } | |
4082 | else if (has_null_arg) | |
4083 | { | |
4084 | null_sym = intr->sym; | |
4085 | continue; | |
4086 | } | |
4087 | ||
22a0a780 | 4088 | /* Satisfy 12.4.4.1 such that an elemental match has lower |
8b704316 | 4089 | weight than a non-elemental match. */ |
22a0a780 PT |
4090 | if (intr->sym->attr.elemental) |
4091 | { | |
4092 | elem_sym = intr->sym; | |
4093 | continue; | |
4094 | } | |
4095 | return intr->sym; | |
4096 | } | |
6de9cd9a DN |
4097 | } |
4098 | ||
ea8ad3e5 TB |
4099 | if (null_sym) |
4100 | return null_sym; | |
4101 | ||
22a0a780 | 4102 | return elem_sym ? elem_sym : NULL; |
6de9cd9a DN |
4103 | } |
4104 | ||
4105 | ||
4106 | /* Do a brute force recursive search for a symbol. */ | |
4107 | ||
4108 | static gfc_symtree * | |
b251af97 | 4109 | find_symtree0 (gfc_symtree *root, gfc_symbol *sym) |
6de9cd9a DN |
4110 | { |
4111 | gfc_symtree * st; | |
4112 | ||
4113 | if (root->n.sym == sym) | |
4114 | return root; | |
4115 | ||
4116 | st = NULL; | |
4117 | if (root->left) | |
4118 | st = find_symtree0 (root->left, sym); | |
4119 | if (root->right && ! st) | |
4120 | st = find_symtree0 (root->right, sym); | |
4121 | return st; | |
4122 | } | |
4123 | ||
4124 | ||
4125 | /* Find a symtree for a symbol. */ | |
4126 | ||
f6fad28e DK |
4127 | gfc_symtree * |
4128 | gfc_find_sym_in_symtree (gfc_symbol *sym) | |
6de9cd9a DN |
4129 | { |
4130 | gfc_symtree *st; | |
4131 | gfc_namespace *ns; | |
4132 | ||
4133 | /* First try to find it by name. */ | |
4134 | gfc_find_sym_tree (sym->name, gfc_current_ns, 1, &st); | |
4135 | if (st && st->n.sym == sym) | |
4136 | return st; | |
4137 | ||
66e4ab31 | 4138 | /* If it's been renamed, resort to a brute-force search. */ |
6de9cd9a DN |
4139 | /* TODO: avoid having to do this search. If the symbol doesn't exist |
4140 | in the symtree for the current namespace, it should probably be added. */ | |
4141 | for (ns = gfc_current_ns; ns; ns = ns->parent) | |
4142 | { | |
4143 | st = find_symtree0 (ns->sym_root, sym); | |
4144 | if (st) | |
b251af97 | 4145 | return st; |
6de9cd9a | 4146 | } |
17d5d49f | 4147 | gfc_internal_error ("Unable to find symbol %qs", sym->name); |
66e4ab31 | 4148 | /* Not reached. */ |
6de9cd9a DN |
4149 | } |
4150 | ||
4151 | ||
4a44a72d DK |
4152 | /* See if the arglist to an operator-call contains a derived-type argument |
4153 | with a matching type-bound operator. If so, return the matching specific | |
4154 | procedure defined as operator-target as well as the base-object to use | |
974df0f8 PT |
4155 | (which is the found derived-type argument with operator). The generic |
4156 | name, if any, is transmitted to the final expression via 'gname'. */ | |
4a44a72d DK |
4157 | |
4158 | static gfc_typebound_proc* | |
4159 | matching_typebound_op (gfc_expr** tb_base, | |
4160 | gfc_actual_arglist* args, | |
974df0f8 PT |
4161 | gfc_intrinsic_op op, const char* uop, |
4162 | const char ** gname) | |
4a44a72d DK |
4163 | { |
4164 | gfc_actual_arglist* base; | |
4165 | ||
4166 | for (base = args; base; base = base->next) | |
4b7dd692 | 4167 | if (base->expr->ts.type == BT_DERIVED || base->expr->ts.type == BT_CLASS) |
4a44a72d DK |
4168 | { |
4169 | gfc_typebound_proc* tb; | |
4170 | gfc_symbol* derived; | |
524af0d6 | 4171 | bool result; |
4a44a72d | 4172 | |
efd2e969 PT |
4173 | while (base->expr->expr_type == EXPR_OP |
4174 | && base->expr->value.op.op == INTRINSIC_PARENTHESES) | |
4175 | base->expr = base->expr->value.op.op1; | |
4176 | ||
4b7dd692 | 4177 | if (base->expr->ts.type == BT_CLASS) |
528622fd | 4178 | { |
fba5a793 | 4179 | if (!base->expr->ts.u.derived || CLASS_DATA (base->expr) == NULL |
0a59e583 | 4180 | || !gfc_expr_attr (base->expr).class_ok) |
528622fd JW |
4181 | continue; |
4182 | derived = CLASS_DATA (base->expr)->ts.u.derived; | |
4183 | } | |
4b7dd692 JW |
4184 | else |
4185 | derived = base->expr->ts.u.derived; | |
4a44a72d DK |
4186 | |
4187 | if (op == INTRINSIC_USER) | |
4188 | { | |
4189 | gfc_symtree* tb_uop; | |
4190 | ||
4191 | gcc_assert (uop); | |
4192 | tb_uop = gfc_find_typebound_user_op (derived, &result, uop, | |
4193 | false, NULL); | |
4194 | ||
4195 | if (tb_uop) | |
4196 | tb = tb_uop->n.tb; | |
4197 | else | |
4198 | tb = NULL; | |
4199 | } | |
4200 | else | |
4201 | tb = gfc_find_typebound_intrinsic_op (derived, &result, op, | |
4202 | false, NULL); | |
4203 | ||
4204 | /* This means we hit a PRIVATE operator which is use-associated and | |
4205 | should thus not be seen. */ | |
524af0d6 | 4206 | if (!result) |
4a44a72d DK |
4207 | tb = NULL; |
4208 | ||
4209 | /* Look through the super-type hierarchy for a matching specific | |
4210 | binding. */ | |
4211 | for (; tb; tb = tb->overridden) | |
4212 | { | |
4213 | gfc_tbp_generic* g; | |
4214 | ||
4215 | gcc_assert (tb->is_generic); | |
4216 | for (g = tb->u.generic; g; g = g->next) | |
4217 | { | |
4218 | gfc_symbol* target; | |
4219 | gfc_actual_arglist* argcopy; | |
4220 | bool matches; | |
4221 | ||
4222 | gcc_assert (g->specific); | |
4223 | if (g->specific->error) | |
4224 | continue; | |
4225 | ||
4226 | target = g->specific->u.specific->n.sym; | |
4227 | ||
4228 | /* Check if this arglist matches the formal. */ | |
4229 | argcopy = gfc_copy_actual_arglist (args); | |
4230 | matches = gfc_arglist_matches_symbol (&argcopy, target); | |
4231 | gfc_free_actual_arglist (argcopy); | |
4232 | ||
4233 | /* Return if we found a match. */ | |
4234 | if (matches) | |
4235 | { | |
4236 | *tb_base = base->expr; | |
974df0f8 | 4237 | *gname = g->specific_st->name; |
4a44a72d DK |
4238 | return g->specific; |
4239 | } | |
4240 | } | |
4241 | } | |
4242 | } | |
4243 | ||
4244 | return NULL; | |
4245 | } | |
4246 | ||
4247 | ||
4248 | /* For the 'actual arglist' of an operator call and a specific typebound | |
4249 | procedure that has been found the target of a type-bound operator, build the | |
4250 | appropriate EXPR_COMPCALL and resolve it. We take this indirection over | |
4251 | type-bound procedures rather than resolving type-bound operators 'directly' | |
4252 | so that we can reuse the existing logic. */ | |
4253 | ||
4254 | static void | |
4255 | build_compcall_for_operator (gfc_expr* e, gfc_actual_arglist* actual, | |
974df0f8 PT |
4256 | gfc_expr* base, gfc_typebound_proc* target, |
4257 | const char *gname) | |
4a44a72d DK |
4258 | { |
4259 | e->expr_type = EXPR_COMPCALL; | |
4260 | e->value.compcall.tbp = target; | |
974df0f8 | 4261 | e->value.compcall.name = gname ? gname : "$op"; |
4a44a72d DK |
4262 | e->value.compcall.actual = actual; |
4263 | e->value.compcall.base_object = base; | |
4264 | e->value.compcall.ignore_pass = 1; | |
4265 | e->value.compcall.assign = 0; | |
94fae14b PT |
4266 | if (e->ts.type == BT_UNKNOWN |
4267 | && target->function) | |
4268 | { | |
4269 | if (target->is_generic) | |
4270 | e->ts = target->u.generic->specific->u.specific->n.sym->ts; | |
4271 | else | |
4272 | e->ts = target->u.specific->n.sym->ts; | |
4273 | } | |
4a44a72d DK |
4274 | } |
4275 | ||
4276 | ||
6de9cd9a DN |
4277 | /* This subroutine is called when an expression is being resolved. |
4278 | The expression node in question is either a user defined operator | |
1f2959f0 | 4279 | or an intrinsic operator with arguments that aren't compatible |
6de9cd9a DN |
4280 | with the operator. This subroutine builds an actual argument list |
4281 | corresponding to the operands, then searches for a compatible | |
4282 | interface. If one is found, the expression node is replaced with | |
eaee02a5 JW |
4283 | the appropriate function call. We use the 'match' enum to specify |
4284 | whether a replacement has been made or not, or if an error occurred. */ | |
6de9cd9a | 4285 | |
eaee02a5 JW |
4286 | match |
4287 | gfc_extend_expr (gfc_expr *e) | |
6de9cd9a DN |
4288 | { |
4289 | gfc_actual_arglist *actual; | |
4290 | gfc_symbol *sym; | |
4291 | gfc_namespace *ns; | |
4292 | gfc_user_op *uop; | |
4293 | gfc_intrinsic_op i; | |
974df0f8 | 4294 | const char *gname; |
517d78be JW |
4295 | gfc_typebound_proc* tbo; |
4296 | gfc_expr* tb_base; | |
6de9cd9a DN |
4297 | |
4298 | sym = NULL; | |
4299 | ||
4300 | actual = gfc_get_actual_arglist (); | |
58b03ab2 | 4301 | actual->expr = e->value.op.op1; |
6de9cd9a | 4302 | |
974df0f8 | 4303 | gname = NULL; |
4a44a72d | 4304 | |
58b03ab2 | 4305 | if (e->value.op.op2 != NULL) |
6de9cd9a DN |
4306 | { |
4307 | actual->next = gfc_get_actual_arglist (); | |
58b03ab2 | 4308 | actual->next->expr = e->value.op.op2; |
6de9cd9a DN |
4309 | } |
4310 | ||
e8d4f3fc | 4311 | i = fold_unary_intrinsic (e->value.op.op); |
6de9cd9a | 4312 | |
517d78be JW |
4313 | /* See if we find a matching type-bound operator. */ |
4314 | if (i == INTRINSIC_USER) | |
4315 | tbo = matching_typebound_op (&tb_base, actual, | |
4316 | i, e->value.op.uop->name, &gname); | |
4317 | else | |
4318 | switch (i) | |
4319 | { | |
4320 | #define CHECK_OS_COMPARISON(comp) \ | |
4321 | case INTRINSIC_##comp: \ | |
4322 | case INTRINSIC_##comp##_OS: \ | |
4323 | tbo = matching_typebound_op (&tb_base, actual, \ | |
4324 | INTRINSIC_##comp, NULL, &gname); \ | |
4325 | if (!tbo) \ | |
4326 | tbo = matching_typebound_op (&tb_base, actual, \ | |
4327 | INTRINSIC_##comp##_OS, NULL, &gname); \ | |
4328 | break; | |
4329 | CHECK_OS_COMPARISON(EQ) | |
4330 | CHECK_OS_COMPARISON(NE) | |
4331 | CHECK_OS_COMPARISON(GT) | |
4332 | CHECK_OS_COMPARISON(GE) | |
4333 | CHECK_OS_COMPARISON(LT) | |
4334 | CHECK_OS_COMPARISON(LE) | |
4335 | #undef CHECK_OS_COMPARISON | |
4336 | ||
4337 | default: | |
4338 | tbo = matching_typebound_op (&tb_base, actual, i, NULL, &gname); | |
4339 | break; | |
4340 | } | |
4341 | ||
4342 | /* If there is a matching typebound-operator, replace the expression with | |
4343 | a call to it and succeed. */ | |
4344 | if (tbo) | |
4345 | { | |
4346 | gcc_assert (tb_base); | |
4347 | build_compcall_for_operator (e, actual, tb_base, tbo, gname); | |
4348 | ||
4349 | if (!gfc_resolve_expr (e)) | |
4350 | return MATCH_ERROR; | |
4351 | else | |
4352 | return MATCH_YES; | |
4353 | } | |
e73d3ca6 | 4354 | |
6de9cd9a DN |
4355 | if (i == INTRINSIC_USER) |
4356 | { | |
4357 | for (ns = gfc_current_ns; ns; ns = ns->parent) | |
4358 | { | |
58b03ab2 | 4359 | uop = gfc_find_uop (e->value.op.uop->name, ns); |
6de9cd9a DN |
4360 | if (uop == NULL) |
4361 | continue; | |
4362 | ||
a1ee985f | 4363 | sym = gfc_search_interface (uop->op, 0, &actual); |
6de9cd9a DN |
4364 | if (sym != NULL) |
4365 | break; | |
4366 | } | |
4367 | } | |
4368 | else | |
4369 | { | |
4370 | for (ns = gfc_current_ns; ns; ns = ns->parent) | |
4371 | { | |
3bed9dd0 DF |
4372 | /* Due to the distinction between '==' and '.eq.' and friends, one has |
4373 | to check if either is defined. */ | |
4374 | switch (i) | |
4375 | { | |
4a44a72d DK |
4376 | #define CHECK_OS_COMPARISON(comp) \ |
4377 | case INTRINSIC_##comp: \ | |
4378 | case INTRINSIC_##comp##_OS: \ | |
4379 | sym = gfc_search_interface (ns->op[INTRINSIC_##comp], 0, &actual); \ | |
4380 | if (!sym) \ | |
4381 | sym = gfc_search_interface (ns->op[INTRINSIC_##comp##_OS], 0, &actual); \ | |
4382 | break; | |
4383 | CHECK_OS_COMPARISON(EQ) | |
4384 | CHECK_OS_COMPARISON(NE) | |
4385 | CHECK_OS_COMPARISON(GT) | |
4386 | CHECK_OS_COMPARISON(GE) | |
4387 | CHECK_OS_COMPARISON(LT) | |
4388 | CHECK_OS_COMPARISON(LE) | |
4389 | #undef CHECK_OS_COMPARISON | |
3bed9dd0 DF |
4390 | |
4391 | default: | |
a1ee985f | 4392 | sym = gfc_search_interface (ns->op[i], 0, &actual); |
3bed9dd0 DF |
4393 | } |
4394 | ||
6de9cd9a DN |
4395 | if (sym != NULL) |
4396 | break; | |
4397 | } | |
4398 | } | |
4399 | ||
4a44a72d DK |
4400 | /* TODO: Do an ambiguity-check and error if multiple matching interfaces are |
4401 | found rather than just taking the first one and not checking further. */ | |
4402 | ||
6de9cd9a DN |
4403 | if (sym == NULL) |
4404 | { | |
66e4ab31 | 4405 | /* Don't use gfc_free_actual_arglist(). */ |
04695783 | 4406 | free (actual->next); |
cede9502 | 4407 | free (actual); |
eaee02a5 | 4408 | return MATCH_NO; |
6de9cd9a DN |
4409 | } |
4410 | ||
4411 | /* Change the expression node to a function call. */ | |
4412 | e->expr_type = EXPR_FUNCTION; | |
f6fad28e | 4413 | e->symtree = gfc_find_sym_in_symtree (sym); |
6de9cd9a | 4414 | e->value.function.actual = actual; |
58b03ab2 TS |
4415 | e->value.function.esym = NULL; |
4416 | e->value.function.isym = NULL; | |
cf013e9f | 4417 | e->value.function.name = NULL; |
a1ab6660 | 4418 | e->user_operator = 1; |
6de9cd9a | 4419 | |
524af0d6 | 4420 | if (!gfc_resolve_expr (e)) |
eaee02a5 | 4421 | return MATCH_ERROR; |
6de9cd9a | 4422 | |
eaee02a5 | 4423 | return MATCH_YES; |
6de9cd9a DN |
4424 | } |
4425 | ||
4426 | ||
4f7395ff JW |
4427 | /* Tries to replace an assignment code node with a subroutine call to the |
4428 | subroutine associated with the assignment operator. Return true if the node | |
4429 | was replaced. On false, no error is generated. */ | |
6de9cd9a | 4430 | |
524af0d6 | 4431 | bool |
b251af97 | 4432 | gfc_extend_assign (gfc_code *c, gfc_namespace *ns) |
6de9cd9a DN |
4433 | { |
4434 | gfc_actual_arglist *actual; | |
4f7395ff JW |
4435 | gfc_expr *lhs, *rhs, *tb_base; |
4436 | gfc_symbol *sym = NULL; | |
4437 | const char *gname = NULL; | |
4438 | gfc_typebound_proc* tbo; | |
6de9cd9a | 4439 | |
a513927a | 4440 | lhs = c->expr1; |
6de9cd9a DN |
4441 | rhs = c->expr2; |
4442 | ||
8dc63166 SK |
4443 | /* Don't allow an intrinsic assignment with a BOZ rhs to be replaced. */ |
4444 | if (c->op == EXEC_ASSIGN | |
4445 | && c->expr1->expr_type == EXPR_VARIABLE | |
4446 | && c->expr2->expr_type == EXPR_CONSTANT && c->expr2->ts.type == BT_BOZ) | |
4447 | return false; | |
4448 | ||
6de9cd9a | 4449 | /* Don't allow an intrinsic assignment to be replaced. */ |
4b7dd692 | 4450 | if (lhs->ts.type != BT_DERIVED && lhs->ts.type != BT_CLASS |
e19bb186 | 4451 | && (rhs->rank == 0 || rhs->rank == lhs->rank) |
6de9cd9a | 4452 | && (lhs->ts.type == rhs->ts.type |
b251af97 | 4453 | || (gfc_numeric_ts (&lhs->ts) && gfc_numeric_ts (&rhs->ts)))) |
524af0d6 | 4454 | return false; |
6de9cd9a DN |
4455 | |
4456 | actual = gfc_get_actual_arglist (); | |
4457 | actual->expr = lhs; | |
4458 | ||
4459 | actual->next = gfc_get_actual_arglist (); | |
4460 | actual->next->expr = rhs; | |
4461 | ||
4f7395ff JW |
4462 | /* TODO: Ambiguity-check, see above for gfc_extend_expr. */ |
4463 | ||
4464 | /* See if we find a matching type-bound assignment. */ | |
4465 | tbo = matching_typebound_op (&tb_base, actual, INTRINSIC_ASSIGN, | |
4466 | NULL, &gname); | |
4467 | ||
4468 | if (tbo) | |
4469 | { | |
4470 | /* Success: Replace the expression with a type-bound call. */ | |
4471 | gcc_assert (tb_base); | |
4472 | c->expr1 = gfc_get_expr (); | |
4473 | build_compcall_for_operator (c->expr1, actual, tb_base, tbo, gname); | |
4474 | c->expr1->value.compcall.assign = 1; | |
4475 | c->expr1->where = c->loc; | |
4476 | c->expr2 = NULL; | |
4477 | c->op = EXEC_COMPCALL; | |
4478 | return true; | |
4479 | } | |
6de9cd9a | 4480 | |
4f7395ff | 4481 | /* See if we find an 'ordinary' (non-typebound) assignment procedure. */ |
6de9cd9a DN |
4482 | for (; ns; ns = ns->parent) |
4483 | { | |
a1ee985f | 4484 | sym = gfc_search_interface (ns->op[INTRINSIC_ASSIGN], 1, &actual); |
6de9cd9a DN |
4485 | if (sym != NULL) |
4486 | break; | |
4487 | } | |
4488 | ||
4f7395ff | 4489 | if (sym) |
6de9cd9a | 4490 | { |
4f7395ff JW |
4491 | /* Success: Replace the assignment with the call. */ |
4492 | c->op = EXEC_ASSIGN_CALL; | |
4493 | c->symtree = gfc_find_sym_in_symtree (sym); | |
4494 | c->expr1 = NULL; | |
4495 | c->expr2 = NULL; | |
4496 | c->ext.actual = actual; | |
4497 | return true; | |
6de9cd9a DN |
4498 | } |
4499 | ||
4f7395ff JW |
4500 | /* Failure: No assignment procedure found. */ |
4501 | free (actual->next); | |
4502 | free (actual); | |
4503 | return false; | |
6de9cd9a DN |
4504 | } |
4505 | ||
4506 | ||
4507 | /* Make sure that the interface just parsed is not already present in | |
4508 | the given interface list. Ambiguity isn't checked yet since module | |
4509 | procedures can be present without interfaces. */ | |
4510 | ||
524af0d6 | 4511 | bool |
362aa474 | 4512 | gfc_check_new_interface (gfc_interface *base, gfc_symbol *new_sym, locus loc) |
6de9cd9a DN |
4513 | { |
4514 | gfc_interface *ip; | |
4515 | ||
4516 | for (ip = base; ip; ip = ip->next) | |
4517 | { | |
7b901ac4 | 4518 | if (ip->sym == new_sym) |
6de9cd9a | 4519 | { |
c4100eae | 4520 | gfc_error ("Entity %qs at %L is already present in the interface", |
362aa474 | 4521 | new_sym->name, &loc); |
524af0d6 | 4522 | return false; |
6de9cd9a DN |
4523 | } |
4524 | } | |
4525 | ||
524af0d6 | 4526 | return true; |
6de9cd9a DN |
4527 | } |
4528 | ||
4529 | ||
4530 | /* Add a symbol to the current interface. */ | |
4531 | ||
524af0d6 | 4532 | bool |
7b901ac4 | 4533 | gfc_add_interface (gfc_symbol *new_sym) |
6de9cd9a DN |
4534 | { |
4535 | gfc_interface **head, *intr; | |
4536 | gfc_namespace *ns; | |
4537 | gfc_symbol *sym; | |
4538 | ||
4539 | switch (current_interface.type) | |
4540 | { | |
4541 | case INTERFACE_NAMELESS: | |
9e1d712c | 4542 | case INTERFACE_ABSTRACT: |
524af0d6 | 4543 | return true; |
6de9cd9a DN |
4544 | |
4545 | case INTERFACE_INTRINSIC_OP: | |
4546 | for (ns = current_interface.ns; ns; ns = ns->parent) | |
3bed9dd0 DF |
4547 | switch (current_interface.op) |
4548 | { | |
4549 | case INTRINSIC_EQ: | |
4550 | case INTRINSIC_EQ_OS: | |
e73d3ca6 | 4551 | if (!gfc_check_new_interface (ns->op[INTRINSIC_EQ], new_sym, |
524af0d6 | 4552 | gfc_current_locus) |
e73d3ca6 | 4553 | || !gfc_check_new_interface (ns->op[INTRINSIC_EQ_OS], |
524af0d6 JB |
4554 | new_sym, gfc_current_locus)) |
4555 | return false; | |
3bed9dd0 DF |
4556 | break; |
4557 | ||
4558 | case INTRINSIC_NE: | |
4559 | case INTRINSIC_NE_OS: | |
e73d3ca6 | 4560 | if (!gfc_check_new_interface (ns->op[INTRINSIC_NE], new_sym, |
524af0d6 | 4561 | gfc_current_locus) |
e73d3ca6 | 4562 | || !gfc_check_new_interface (ns->op[INTRINSIC_NE_OS], |
524af0d6 JB |
4563 | new_sym, gfc_current_locus)) |
4564 | return false; | |
3bed9dd0 DF |
4565 | break; |
4566 | ||
4567 | case INTRINSIC_GT: | |
4568 | case INTRINSIC_GT_OS: | |
e73d3ca6 | 4569 | if (!gfc_check_new_interface (ns->op[INTRINSIC_GT], |
524af0d6 | 4570 | new_sym, gfc_current_locus) |
e73d3ca6 | 4571 | || !gfc_check_new_interface (ns->op[INTRINSIC_GT_OS], |
524af0d6 JB |
4572 | new_sym, gfc_current_locus)) |
4573 | return false; | |
3bed9dd0 DF |
4574 | break; |
4575 | ||
4576 | case INTRINSIC_GE: | |
4577 | case INTRINSIC_GE_OS: | |
e73d3ca6 | 4578 | if (!gfc_check_new_interface (ns->op[INTRINSIC_GE], |
524af0d6 | 4579 | new_sym, gfc_current_locus) |
e73d3ca6 | 4580 | || !gfc_check_new_interface (ns->op[INTRINSIC_GE_OS], |
524af0d6 JB |
4581 | new_sym, gfc_current_locus)) |
4582 | return false; | |
3bed9dd0 DF |
4583 | break; |
4584 | ||
4585 | case INTRINSIC_LT: | |
4586 | case INTRINSIC_LT_OS: | |
e73d3ca6 | 4587 | if (!gfc_check_new_interface (ns->op[INTRINSIC_LT], |
524af0d6 | 4588 | new_sym, gfc_current_locus) |
e73d3ca6 | 4589 | || !gfc_check_new_interface (ns->op[INTRINSIC_LT_OS], |
524af0d6 JB |
4590 | new_sym, gfc_current_locus)) |
4591 | return false; | |
3bed9dd0 DF |
4592 | break; |
4593 | ||
4594 | case INTRINSIC_LE: | |
4595 | case INTRINSIC_LE_OS: | |
e73d3ca6 | 4596 | if (!gfc_check_new_interface (ns->op[INTRINSIC_LE], |
524af0d6 | 4597 | new_sym, gfc_current_locus) |
e73d3ca6 | 4598 | || !gfc_check_new_interface (ns->op[INTRINSIC_LE_OS], |
524af0d6 JB |
4599 | new_sym, gfc_current_locus)) |
4600 | return false; | |
3bed9dd0 DF |
4601 | break; |
4602 | ||
4603 | default: | |
e73d3ca6 | 4604 | if (!gfc_check_new_interface (ns->op[current_interface.op], |
524af0d6 JB |
4605 | new_sym, gfc_current_locus)) |
4606 | return false; | |
3bed9dd0 | 4607 | } |
6de9cd9a | 4608 | |
a1ee985f | 4609 | head = ¤t_interface.ns->op[current_interface.op]; |
6de9cd9a DN |
4610 | break; |
4611 | ||
4612 | case INTERFACE_GENERIC: | |
e73d3ca6 | 4613 | case INTERFACE_DTIO: |
6de9cd9a DN |
4614 | for (ns = current_interface.ns; ns; ns = ns->parent) |
4615 | { | |
4616 | gfc_find_symbol (current_interface.sym->name, ns, 0, &sym); | |
4617 | if (sym == NULL) | |
4618 | continue; | |
4619 | ||
e73d3ca6 | 4620 | if (!gfc_check_new_interface (sym->generic, |
524af0d6 JB |
4621 | new_sym, gfc_current_locus)) |
4622 | return false; | |
6de9cd9a DN |
4623 | } |
4624 | ||
4625 | head = ¤t_interface.sym->generic; | |
4626 | break; | |
4627 | ||
4628 | case INTERFACE_USER_OP: | |
e73d3ca6 | 4629 | if (!gfc_check_new_interface (current_interface.uop->op, |
524af0d6 JB |
4630 | new_sym, gfc_current_locus)) |
4631 | return false; | |
6de9cd9a | 4632 | |
a1ee985f | 4633 | head = ¤t_interface.uop->op; |
6de9cd9a DN |
4634 | break; |
4635 | ||
4636 | default: | |
4637 | gfc_internal_error ("gfc_add_interface(): Bad interface type"); | |
4638 | } | |
4639 | ||
4640 | intr = gfc_get_interface (); | |
7b901ac4 | 4641 | intr->sym = new_sym; |
63645982 | 4642 | intr->where = gfc_current_locus; |
6de9cd9a DN |
4643 | |
4644 | intr->next = *head; | |
4645 | *head = intr; | |
4646 | ||
524af0d6 | 4647 | return true; |
6de9cd9a DN |
4648 | } |
4649 | ||
4650 | ||
2b77e908 FXC |
4651 | gfc_interface * |
4652 | gfc_current_interface_head (void) | |
4653 | { | |
4654 | switch (current_interface.type) | |
4655 | { | |
4656 | case INTERFACE_INTRINSIC_OP: | |
a1ee985f | 4657 | return current_interface.ns->op[current_interface.op]; |
2b77e908 FXC |
4658 | |
4659 | case INTERFACE_GENERIC: | |
e73d3ca6 | 4660 | case INTERFACE_DTIO: |
2b77e908 | 4661 | return current_interface.sym->generic; |
2b77e908 FXC |
4662 | |
4663 | case INTERFACE_USER_OP: | |
a1ee985f | 4664 | return current_interface.uop->op; |
2b77e908 FXC |
4665 | |
4666 | default: | |
4667 | gcc_unreachable (); | |
4668 | } | |
4669 | } | |
4670 | ||
4671 | ||
4672 | void | |
4673 | gfc_set_current_interface_head (gfc_interface *i) | |
4674 | { | |
4675 | switch (current_interface.type) | |
4676 | { | |
4677 | case INTERFACE_INTRINSIC_OP: | |
a1ee985f | 4678 | current_interface.ns->op[current_interface.op] = i; |
2b77e908 FXC |
4679 | break; |
4680 | ||
4681 | case INTERFACE_GENERIC: | |
e73d3ca6 | 4682 | case INTERFACE_DTIO: |
2b77e908 FXC |
4683 | current_interface.sym->generic = i; |
4684 | break; | |
4685 | ||
4686 | case INTERFACE_USER_OP: | |
a1ee985f | 4687 | current_interface.uop->op = i; |
2b77e908 FXC |
4688 | break; |
4689 | ||
4690 | default: | |
4691 | gcc_unreachable (); | |
4692 | } | |
4693 | } | |
4694 | ||
4695 | ||
6de9cd9a DN |
4696 | /* Gets rid of a formal argument list. We do not free symbols. |
4697 | Symbols are freed when a namespace is freed. */ | |
4698 | ||
4699 | void | |
b251af97 | 4700 | gfc_free_formal_arglist (gfc_formal_arglist *p) |
6de9cd9a DN |
4701 | { |
4702 | gfc_formal_arglist *q; | |
4703 | ||
4704 | for (; p; p = q) | |
4705 | { | |
4706 | q = p->next; | |
cede9502 | 4707 | free (p); |
6de9cd9a DN |
4708 | } |
4709 | } | |
99fc1b90 JW |
4710 | |
4711 | ||
9795c594 JW |
4712 | /* Check that it is ok for the type-bound procedure 'proc' to override the |
4713 | procedure 'old', cf. F08:4.5.7.3. */ | |
99fc1b90 | 4714 | |
524af0d6 | 4715 | bool |
99fc1b90 JW |
4716 | gfc_check_typebound_override (gfc_symtree* proc, gfc_symtree* old) |
4717 | { | |
4718 | locus where; | |
edc802c7 | 4719 | gfc_symbol *proc_target, *old_target; |
99fc1b90 | 4720 | unsigned proc_pass_arg, old_pass_arg, argpos; |
9795c594 JW |
4721 | gfc_formal_arglist *proc_formal, *old_formal; |
4722 | bool check_type; | |
4723 | char err[200]; | |
99fc1b90 JW |
4724 | |
4725 | /* This procedure should only be called for non-GENERIC proc. */ | |
4726 | gcc_assert (!proc->n.tb->is_generic); | |
4727 | ||
4728 | /* If the overwritten procedure is GENERIC, this is an error. */ | |
4729 | if (old->n.tb->is_generic) | |
4730 | { | |
1fe61adf | 4731 | gfc_error ("Cannot overwrite GENERIC %qs at %L", |
99fc1b90 | 4732 | old->name, &proc->n.tb->where); |
524af0d6 | 4733 | return false; |
99fc1b90 JW |
4734 | } |
4735 | ||
4736 | where = proc->n.tb->where; | |
4737 | proc_target = proc->n.tb->u.specific->n.sym; | |
4738 | old_target = old->n.tb->u.specific->n.sym; | |
4739 | ||
4740 | /* Check that overridden binding is not NON_OVERRIDABLE. */ | |
4741 | if (old->n.tb->non_overridable) | |
4742 | { | |
c4100eae | 4743 | gfc_error ("%qs at %L overrides a procedure binding declared" |
99fc1b90 | 4744 | " NON_OVERRIDABLE", proc->name, &where); |
524af0d6 | 4745 | return false; |
99fc1b90 JW |
4746 | } |
4747 | ||
4748 | /* It's an error to override a non-DEFERRED procedure with a DEFERRED one. */ | |
4749 | if (!old->n.tb->deferred && proc->n.tb->deferred) | |
4750 | { | |
c4100eae | 4751 | gfc_error ("%qs at %L must not be DEFERRED as it overrides a" |
99fc1b90 | 4752 | " non-DEFERRED binding", proc->name, &where); |
524af0d6 | 4753 | return false; |
99fc1b90 JW |
4754 | } |
4755 | ||
4756 | /* If the overridden binding is PURE, the overriding must be, too. */ | |
4757 | if (old_target->attr.pure && !proc_target->attr.pure) | |
4758 | { | |
c4100eae | 4759 | gfc_error ("%qs at %L overrides a PURE procedure and must also be PURE", |
99fc1b90 | 4760 | proc->name, &where); |
524af0d6 | 4761 | return false; |
99fc1b90 JW |
4762 | } |
4763 | ||
4764 | /* If the overridden binding is ELEMENTAL, the overriding must be, too. If it | |
4765 | is not, the overriding must not be either. */ | |
4766 | if (old_target->attr.elemental && !proc_target->attr.elemental) | |
4767 | { | |
c4100eae | 4768 | gfc_error ("%qs at %L overrides an ELEMENTAL procedure and must also be" |
99fc1b90 | 4769 | " ELEMENTAL", proc->name, &where); |
524af0d6 | 4770 | return false; |
99fc1b90 JW |
4771 | } |
4772 | if (!old_target->attr.elemental && proc_target->attr.elemental) | |
4773 | { | |
c4100eae | 4774 | gfc_error ("%qs at %L overrides a non-ELEMENTAL procedure and must not" |
99fc1b90 | 4775 | " be ELEMENTAL, either", proc->name, &where); |
524af0d6 | 4776 | return false; |
99fc1b90 JW |
4777 | } |
4778 | ||
4779 | /* If the overridden binding is a SUBROUTINE, the overriding must also be a | |
4780 | SUBROUTINE. */ | |
4781 | if (old_target->attr.subroutine && !proc_target->attr.subroutine) | |
4782 | { | |
c4100eae | 4783 | gfc_error ("%qs at %L overrides a SUBROUTINE and must also be a" |
99fc1b90 | 4784 | " SUBROUTINE", proc->name, &where); |
524af0d6 | 4785 | return false; |
99fc1b90 JW |
4786 | } |
4787 | ||
4788 | /* If the overridden binding is a FUNCTION, the overriding must also be a | |
4789 | FUNCTION and have the same characteristics. */ | |
4790 | if (old_target->attr.function) | |
4791 | { | |
4792 | if (!proc_target->attr.function) | |
4793 | { | |
c4100eae | 4794 | gfc_error ("%qs at %L overrides a FUNCTION and must also be a" |
99fc1b90 | 4795 | " FUNCTION", proc->name, &where); |
524af0d6 | 4796 | return false; |
99fc1b90 | 4797 | } |
8b704316 | 4798 | |
4668d6f9 PT |
4799 | if (!gfc_check_result_characteristics (proc_target, old_target, |
4800 | err, sizeof(err))) | |
2240d1cf | 4801 | { |
edc802c7 | 4802 | gfc_error ("Result mismatch for the overriding procedure " |
c4100eae | 4803 | "%qs at %L: %s", proc->name, &where, err); |
524af0d6 | 4804 | return false; |
2240d1cf | 4805 | } |
99fc1b90 JW |
4806 | } |
4807 | ||
4808 | /* If the overridden binding is PUBLIC, the overriding one must not be | |
4809 | PRIVATE. */ | |
4810 | if (old->n.tb->access == ACCESS_PUBLIC | |
4811 | && proc->n.tb->access == ACCESS_PRIVATE) | |
4812 | { | |
c4100eae | 4813 | gfc_error ("%qs at %L overrides a PUBLIC procedure and must not be" |
99fc1b90 | 4814 | " PRIVATE", proc->name, &where); |
524af0d6 | 4815 | return false; |
99fc1b90 JW |
4816 | } |
4817 | ||
4818 | /* Compare the formal argument lists of both procedures. This is also abused | |
4819 | to find the position of the passed-object dummy arguments of both | |
4820 | bindings as at least the overridden one might not yet be resolved and we | |
4821 | need those positions in the check below. */ | |
4822 | proc_pass_arg = old_pass_arg = 0; | |
4823 | if (!proc->n.tb->nopass && !proc->n.tb->pass_arg) | |
4824 | proc_pass_arg = 1; | |
4825 | if (!old->n.tb->nopass && !old->n.tb->pass_arg) | |
4826 | old_pass_arg = 1; | |
4827 | argpos = 1; | |
4cbc9039 JW |
4828 | proc_formal = gfc_sym_get_dummy_args (proc_target); |
4829 | old_formal = gfc_sym_get_dummy_args (old_target); | |
4830 | for ( ; proc_formal && old_formal; | |
99fc1b90 JW |
4831 | proc_formal = proc_formal->next, old_formal = old_formal->next) |
4832 | { | |
4833 | if (proc->n.tb->pass_arg | |
4834 | && !strcmp (proc->n.tb->pass_arg, proc_formal->sym->name)) | |
4835 | proc_pass_arg = argpos; | |
4836 | if (old->n.tb->pass_arg | |
4837 | && !strcmp (old->n.tb->pass_arg, old_formal->sym->name)) | |
4838 | old_pass_arg = argpos; | |
4839 | ||
4840 | /* Check that the names correspond. */ | |
4841 | if (strcmp (proc_formal->sym->name, old_formal->sym->name)) | |
4842 | { | |
c4100eae | 4843 | gfc_error ("Dummy argument %qs of %qs at %L should be named %qs as" |
99fc1b90 JW |
4844 | " to match the corresponding argument of the overridden" |
4845 | " procedure", proc_formal->sym->name, proc->name, &where, | |
4846 | old_formal->sym->name); | |
524af0d6 | 4847 | return false; |
99fc1b90 JW |
4848 | } |
4849 | ||
9795c594 | 4850 | check_type = proc_pass_arg != argpos && old_pass_arg != argpos; |
4668d6f9 | 4851 | if (!gfc_check_dummy_characteristics (proc_formal->sym, old_formal->sym, |
524af0d6 | 4852 | check_type, err, sizeof(err))) |
99fc1b90 | 4853 | { |
e0b9e5f9 | 4854 | gfc_error_opt (0, "Argument mismatch for the overriding procedure " |
2700d0e3 | 4855 | "%qs at %L: %s", proc->name, &where, err); |
524af0d6 | 4856 | return false; |
99fc1b90 JW |
4857 | } |
4858 | ||
4859 | ++argpos; | |
4860 | } | |
4861 | if (proc_formal || old_formal) | |
4862 | { | |
c4100eae | 4863 | gfc_error ("%qs at %L must have the same number of formal arguments as" |
99fc1b90 | 4864 | " the overridden procedure", proc->name, &where); |
524af0d6 | 4865 | return false; |
99fc1b90 JW |
4866 | } |
4867 | ||
4868 | /* If the overridden binding is NOPASS, the overriding one must also be | |
4869 | NOPASS. */ | |
4870 | if (old->n.tb->nopass && !proc->n.tb->nopass) | |
4871 | { | |
c4100eae | 4872 | gfc_error ("%qs at %L overrides a NOPASS binding and must also be" |
99fc1b90 | 4873 | " NOPASS", proc->name, &where); |
524af0d6 | 4874 | return false; |
99fc1b90 JW |
4875 | } |
4876 | ||
4877 | /* If the overridden binding is PASS(x), the overriding one must also be | |
4878 | PASS and the passed-object dummy arguments must correspond. */ | |
4879 | if (!old->n.tb->nopass) | |
4880 | { | |
4881 | if (proc->n.tb->nopass) | |
4882 | { | |
c4100eae | 4883 | gfc_error ("%qs at %L overrides a binding with PASS and must also be" |
99fc1b90 | 4884 | " PASS", proc->name, &where); |
524af0d6 | 4885 | return false; |
99fc1b90 JW |
4886 | } |
4887 | ||
4888 | if (proc_pass_arg != old_pass_arg) | |
4889 | { | |
c4100eae | 4890 | gfc_error ("Passed-object dummy argument of %qs at %L must be at" |
99fc1b90 JW |
4891 | " the same position as the passed-object dummy argument of" |
4892 | " the overridden procedure", proc->name, &where); | |
524af0d6 | 4893 | return false; |
99fc1b90 JW |
4894 | } |
4895 | } | |
4896 | ||
524af0d6 | 4897 | return true; |
99fc1b90 | 4898 | } |
e73d3ca6 PT |
4899 | |
4900 | ||
4901 | /* The following three functions check that the formal arguments | |
4902 | of user defined derived type IO procedures are compliant with | |
f3ad8745 | 4903 | the requirements of the standard, see F03:9.5.3.7.2 (F08:9.6.4.8.3). */ |
e73d3ca6 PT |
4904 | |
4905 | static void | |
4906 | check_dtio_arg_TKR_intent (gfc_symbol *fsym, bool typebound, bt type, | |
4907 | int kind, int rank, sym_intent intent) | |
4908 | { | |
4909 | if (fsym->ts.type != type) | |
739d9339 PT |
4910 | { |
4911 | gfc_error ("DTIO dummy argument at %L must be of type %s", | |
4912 | &fsym->declared_at, gfc_basic_typename (type)); | |
4913 | return; | |
4914 | } | |
e73d3ca6 PT |
4915 | |
4916 | if (fsym->ts.type != BT_CLASS && fsym->ts.type != BT_DERIVED | |
4917 | && fsym->ts.kind != kind) | |
4918 | gfc_error ("DTIO dummy argument at %L must be of KIND = %d", | |
4919 | &fsym->declared_at, kind); | |
4920 | ||
4921 | if (!typebound | |
4922 | && rank == 0 | |
4923 | && (((type == BT_CLASS) && CLASS_DATA (fsym)->attr.dimension) | |
4924 | || ((type != BT_CLASS) && fsym->attr.dimension))) | |
b93a9a15 | 4925 | gfc_error ("DTIO dummy argument at %L must be a scalar", |
e73d3ca6 PT |
4926 | &fsym->declared_at); |
4927 | else if (rank == 1 | |
4928 | && (fsym->as == NULL || fsym->as->type != AS_ASSUMED_SHAPE)) | |
4929 | gfc_error ("DTIO dummy argument at %L must be an " | |
4930 | "ASSUMED SHAPE ARRAY", &fsym->declared_at); | |
4931 | ||
f3ad8745 JW |
4932 | if (type == BT_CHARACTER && fsym->ts.u.cl->length != NULL) |
4933 | gfc_error ("DTIO character argument at %L must have assumed length", | |
4934 | &fsym->declared_at); | |
4935 | ||
e73d3ca6 | 4936 | if (fsym->attr.intent != intent) |
77be9417 | 4937 | gfc_error ("DTIO dummy argument at %L must have INTENT %s", |
e73d3ca6 PT |
4938 | &fsym->declared_at, gfc_code2string (intents, (int)intent)); |
4939 | return; | |
4940 | } | |
4941 | ||
4942 | ||
4943 | static void | |
4944 | check_dtio_interface1 (gfc_symbol *derived, gfc_symtree *tb_io_st, | |
4945 | bool typebound, bool formatted, int code) | |
4946 | { | |
4947 | gfc_symbol *dtio_sub, *generic_proc, *fsym; | |
4948 | gfc_typebound_proc *tb_io_proc, *specific_proc; | |
4949 | gfc_interface *intr; | |
4950 | gfc_formal_arglist *formal; | |
4951 | int arg_num; | |
4952 | ||
4953 | bool read = ((dtio_codes)code == DTIO_RF) | |
4954 | || ((dtio_codes)code == DTIO_RUF); | |
4955 | bt type; | |
4956 | sym_intent intent; | |
4957 | int kind; | |
4958 | ||
4959 | dtio_sub = NULL; | |
4960 | if (typebound) | |
4961 | { | |
4962 | /* Typebound DTIO binding. */ | |
4963 | tb_io_proc = tb_io_st->n.tb; | |
739d9339 PT |
4964 | if (tb_io_proc == NULL) |
4965 | return; | |
4966 | ||
e73d3ca6 | 4967 | gcc_assert (tb_io_proc->is_generic); |
e73d3ca6 PT |
4968 | |
4969 | specific_proc = tb_io_proc->u.generic->specific; | |
739d9339 PT |
4970 | if (specific_proc == NULL || specific_proc->is_generic) |
4971 | return; | |
e73d3ca6 PT |
4972 | |
4973 | dtio_sub = specific_proc->u.specific->n.sym; | |
4974 | } | |
4975 | else | |
4976 | { | |
4977 | generic_proc = tb_io_st->n.sym; | |
739d9339 PT |
4978 | if (generic_proc == NULL || generic_proc->generic == NULL) |
4979 | return; | |
e73d3ca6 PT |
4980 | |
4981 | for (intr = tb_io_st->n.sym->generic; intr; intr = intr->next) | |
4982 | { | |
a8de3002 | 4983 | if (intr->sym && intr->sym->formal && intr->sym->formal->sym |
e73d3ca6 PT |
4984 | && ((intr->sym->formal->sym->ts.type == BT_CLASS |
4985 | && CLASS_DATA (intr->sym->formal->sym)->ts.u.derived | |
4986 | == derived) | |
4987 | || (intr->sym->formal->sym->ts.type == BT_DERIVED | |
4988 | && intr->sym->formal->sym->ts.u.derived == derived))) | |
4989 | { | |
4990 | dtio_sub = intr->sym; | |
4991 | break; | |
4992 | } | |
a8de3002 PT |
4993 | else if (intr->sym && intr->sym->formal && !intr->sym->formal->sym) |
4994 | { | |
4995 | gfc_error ("Alternate return at %L is not permitted in a DTIO " | |
4996 | "procedure", &intr->sym->declared_at); | |
4997 | return; | |
4998 | } | |
e73d3ca6 PT |
4999 | } |
5000 | ||
5001 | if (dtio_sub == NULL) | |
5002 | return; | |
5003 | } | |
5004 | ||
5005 | gcc_assert (dtio_sub); | |
5006 | if (!dtio_sub->attr.subroutine) | |
2f029c08 | 5007 | gfc_error ("DTIO procedure %qs at %L must be a subroutine", |
e73d3ca6 PT |
5008 | dtio_sub->name, &dtio_sub->declared_at); |
5009 | ||
a8de3002 PT |
5010 | arg_num = 0; |
5011 | for (formal = dtio_sub->formal; formal; formal = formal->next) | |
5012 | arg_num++; | |
5013 | ||
5014 | if (arg_num < (formatted ? 6 : 4)) | |
5015 | { | |
2f029c08 | 5016 | gfc_error ("Too few dummy arguments in DTIO procedure %qs at %L", |
a8de3002 PT |
5017 | dtio_sub->name, &dtio_sub->declared_at); |
5018 | return; | |
5019 | } | |
5020 | ||
5021 | if (arg_num > (formatted ? 6 : 4)) | |
5022 | { | |
2f029c08 | 5023 | gfc_error ("Too many dummy arguments in DTIO procedure %qs at %L", |
a8de3002 PT |
5024 | dtio_sub->name, &dtio_sub->declared_at); |
5025 | return; | |
5026 | } | |
5027 | ||
5028 | ||
e73d3ca6 PT |
5029 | /* Now go through the formal arglist. */ |
5030 | arg_num = 1; | |
5031 | for (formal = dtio_sub->formal; formal; formal = formal->next, arg_num++) | |
5032 | { | |
5033 | if (!formatted && arg_num == 3) | |
5034 | arg_num = 5; | |
5035 | fsym = formal->sym; | |
a8de3002 PT |
5036 | |
5037 | if (fsym == NULL) | |
5038 | { | |
5039 | gfc_error ("Alternate return at %L is not permitted in a DTIO " | |
5040 | "procedure", &dtio_sub->declared_at); | |
5041 | return; | |
5042 | } | |
5043 | ||
e73d3ca6 PT |
5044 | switch (arg_num) |
5045 | { | |
5046 | case(1): /* DTV */ | |
5047 | type = derived->attr.sequence || derived->attr.is_bind_c ? | |
5048 | BT_DERIVED : BT_CLASS; | |
5049 | kind = 0; | |
5050 | intent = read ? INTENT_INOUT : INTENT_IN; | |
5051 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
5052 | 0, intent); | |
5053 | break; | |
5054 | ||
5055 | case(2): /* UNIT */ | |
5056 | type = BT_INTEGER; | |
5057 | kind = gfc_default_integer_kind; | |
5058 | intent = INTENT_IN; | |
5059 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
5060 | 0, intent); | |
5061 | break; | |
5062 | case(3): /* IOTYPE */ | |
5063 | type = BT_CHARACTER; | |
5064 | kind = gfc_default_character_kind; | |
5065 | intent = INTENT_IN; | |
5066 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
5067 | 0, intent); | |
5068 | break; | |
5069 | case(4): /* VLIST */ | |
5070 | type = BT_INTEGER; | |
5071 | kind = gfc_default_integer_kind; | |
5072 | intent = INTENT_IN; | |
5073 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
5074 | 1, intent); | |
5075 | break; | |
5076 | case(5): /* IOSTAT */ | |
5077 | type = BT_INTEGER; | |
5078 | kind = gfc_default_integer_kind; | |
5079 | intent = INTENT_OUT; | |
5080 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
5081 | 0, intent); | |
5082 | break; | |
5083 | case(6): /* IOMSG */ | |
5084 | type = BT_CHARACTER; | |
5085 | kind = gfc_default_character_kind; | |
5086 | intent = INTENT_INOUT; | |
5087 | check_dtio_arg_TKR_intent (fsym, typebound, type, kind, | |
5088 | 0, intent); | |
5089 | break; | |
5090 | default: | |
5091 | gcc_unreachable (); | |
5092 | } | |
5093 | } | |
5094 | derived->attr.has_dtio_procs = 1; | |
5095 | return; | |
5096 | } | |
5097 | ||
5098 | void | |
5099 | gfc_check_dtio_interfaces (gfc_symbol *derived) | |
5100 | { | |
5101 | gfc_symtree *tb_io_st; | |
5102 | bool t = false; | |
5103 | int code; | |
5104 | bool formatted; | |
5105 | ||
5106 | if (derived->attr.is_class == 1 || derived->attr.vtype == 1) | |
5107 | return; | |
5108 | ||
5109 | /* Check typebound DTIO bindings. */ | |
5110 | for (code = 0; code < 4; code++) | |
5111 | { | |
5112 | formatted = ((dtio_codes)code == DTIO_RF) | |
5113 | || ((dtio_codes)code == DTIO_WF); | |
5114 | ||
5115 | tb_io_st = gfc_find_typebound_proc (derived, &t, | |
5116 | gfc_code2string (dtio_procs, code), | |
5117 | true, &derived->declared_at); | |
5118 | if (tb_io_st != NULL) | |
5119 | check_dtio_interface1 (derived, tb_io_st, true, formatted, code); | |
5120 | } | |
5121 | ||
5122 | /* Check generic DTIO interfaces. */ | |
5123 | for (code = 0; code < 4; code++) | |
5124 | { | |
5125 | formatted = ((dtio_codes)code == DTIO_RF) | |
5126 | || ((dtio_codes)code == DTIO_WF); | |
5127 | ||
5128 | tb_io_st = gfc_find_symtree (derived->ns->sym_root, | |
5129 | gfc_code2string (dtio_procs, code)); | |
5130 | if (tb_io_st != NULL) | |
5131 | check_dtio_interface1 (derived, tb_io_st, false, formatted, code); | |
5132 | } | |
5133 | } | |
5134 | ||
5135 | ||
e4e659b9 JW |
5136 | gfc_symtree* |
5137 | gfc_find_typebound_dtio_proc (gfc_symbol *derived, bool write, bool formatted) | |
e73d3ca6 PT |
5138 | { |
5139 | gfc_symtree *tb_io_st = NULL; | |
e73d3ca6 PT |
5140 | bool t = false; |
5141 | ||
b93a9a15 | 5142 | if (!derived || !derived->resolved || derived->attr.flavor != FL_DERIVED) |
9beb81ed PT |
5143 | return NULL; |
5144 | ||
e73d3ca6 PT |
5145 | /* Try to find a typebound DTIO binding. */ |
5146 | if (formatted == true) | |
5147 | { | |
5148 | if (write == true) | |
5149 | tb_io_st = gfc_find_typebound_proc (derived, &t, | |
5150 | gfc_code2string (dtio_procs, | |
5151 | DTIO_WF), | |
5152 | true, | |
5153 | &derived->declared_at); | |
5154 | else | |
5155 | tb_io_st = gfc_find_typebound_proc (derived, &t, | |
5156 | gfc_code2string (dtio_procs, | |
5157 | DTIO_RF), | |
5158 | true, | |
5159 | &derived->declared_at); | |
5160 | } | |
5161 | else | |
5162 | { | |
5163 | if (write == true) | |
5164 | tb_io_st = gfc_find_typebound_proc (derived, &t, | |
5165 | gfc_code2string (dtio_procs, | |
5166 | DTIO_WUF), | |
5167 | true, | |
5168 | &derived->declared_at); | |
5169 | else | |
5170 | tb_io_st = gfc_find_typebound_proc (derived, &t, | |
5171 | gfc_code2string (dtio_procs, | |
5172 | DTIO_RUF), | |
5173 | true, | |
5174 | &derived->declared_at); | |
5175 | } | |
e4e659b9 JW |
5176 | return tb_io_st; |
5177 | } | |
5178 | ||
5179 | ||
5180 | gfc_symbol * | |
5181 | gfc_find_specific_dtio_proc (gfc_symbol *derived, bool write, bool formatted) | |
5182 | { | |
5183 | gfc_symtree *tb_io_st = NULL; | |
5184 | gfc_symbol *dtio_sub = NULL; | |
5185 | gfc_symbol *extended; | |
5186 | gfc_typebound_proc *tb_io_proc, *specific_proc; | |
5187 | ||
5188 | tb_io_st = gfc_find_typebound_dtio_proc (derived, write, formatted); | |
e73d3ca6 PT |
5189 | |
5190 | if (tb_io_st != NULL) | |
5191 | { | |
096506bb PT |
5192 | const char *genname; |
5193 | gfc_symtree *st; | |
5194 | ||
e73d3ca6 PT |
5195 | tb_io_proc = tb_io_st->n.tb; |
5196 | gcc_assert (tb_io_proc != NULL); | |
5197 | gcc_assert (tb_io_proc->is_generic); | |
5198 | gcc_assert (tb_io_proc->u.generic->next == NULL); | |
5199 | ||
5200 | specific_proc = tb_io_proc->u.generic->specific; | |
5201 | gcc_assert (!specific_proc->is_generic); | |
5202 | ||
096506bb PT |
5203 | /* Go back and make sure that we have the right specific procedure. |
5204 | Here we most likely have a procedure from the parent type, which | |
5205 | can be overridden in extensions. */ | |
5206 | genname = tb_io_proc->u.generic->specific_st->name; | |
5207 | st = gfc_find_typebound_proc (derived, NULL, genname, | |
5208 | true, &tb_io_proc->where); | |
5209 | if (st) | |
5210 | dtio_sub = st->n.tb->u.specific->n.sym; | |
5211 | else | |
5212 | dtio_sub = specific_proc->u.specific->n.sym; | |
e73d3ca6 | 5213 | |
e4e659b9 JW |
5214 | goto finish; |
5215 | } | |
e73d3ca6 PT |
5216 | |
5217 | /* If there is not a typebound binding, look for a generic | |
5218 | DTIO interface. */ | |
5219 | for (extended = derived; extended; | |
5220 | extended = gfc_get_derived_super_type (extended)) | |
5221 | { | |
e4e659b9 JW |
5222 | if (extended == NULL || extended->ns == NULL |
5223 | || extended->attr.flavor == FL_UNKNOWN) | |
a8de3002 PT |
5224 | return NULL; |
5225 | ||
e73d3ca6 PT |
5226 | if (formatted == true) |
5227 | { | |
5228 | if (write == true) | |
5229 | tb_io_st = gfc_find_symtree (extended->ns->sym_root, | |
5230 | gfc_code2string (dtio_procs, | |
5231 | DTIO_WF)); | |
5232 | else | |
5233 | tb_io_st = gfc_find_symtree (extended->ns->sym_root, | |
5234 | gfc_code2string (dtio_procs, | |
5235 | DTIO_RF)); | |
5236 | } | |
5237 | else | |
5238 | { | |
5239 | if (write == true) | |
5240 | tb_io_st = gfc_find_symtree (extended->ns->sym_root, | |
5241 | gfc_code2string (dtio_procs, | |
5242 | DTIO_WUF)); | |
5243 | else | |
5244 | tb_io_st = gfc_find_symtree (extended->ns->sym_root, | |
5245 | gfc_code2string (dtio_procs, | |
5246 | DTIO_RUF)); | |
5247 | } | |
5248 | ||
5249 | if (tb_io_st != NULL | |
5250 | && tb_io_st->n.sym | |
5251 | && tb_io_st->n.sym->generic) | |
5252 | { | |
40109581 | 5253 | for (gfc_interface *intr = tb_io_st->n.sym->generic; |
413e859c | 5254 | intr && intr->sym; intr = intr->next) |
e73d3ca6 | 5255 | { |
413e859c | 5256 | if (intr->sym->formal) |
e73d3ca6 | 5257 | { |
413e859c JW |
5258 | gfc_symbol *fsym = intr->sym->formal->sym; |
5259 | if ((fsym->ts.type == BT_CLASS | |
5260 | && CLASS_DATA (fsym)->ts.u.derived == extended) | |
5261 | || (fsym->ts.type == BT_DERIVED | |
5262 | && fsym->ts.u.derived == extended)) | |
5263 | { | |
5264 | dtio_sub = intr->sym; | |
5265 | break; | |
5266 | } | |
e73d3ca6 PT |
5267 | } |
5268 | } | |
5269 | } | |
5270 | } | |
5271 | ||
5272 | finish: | |
5273 | if (dtio_sub && derived != CLASS_DATA (dtio_sub->formal->sym)->ts.u.derived) | |
5274 | gfc_find_derived_vtab (derived); | |
5275 | ||
5276 | return dtio_sub; | |
5277 | } | |
e68a35ae TK |
5278 | |
5279 | /* Helper function - if we do not find an interface for a procedure, | |
5280 | construct it from the actual arglist. Luckily, this can only | |
5281 | happen for call by reference, so the information we actually need | |
5282 | to provide (and which would be impossible to guess from the call | |
5283 | itself) is not actually needed. */ | |
5284 | ||
5285 | void | |
5286 | gfc_get_formal_from_actual_arglist (gfc_symbol *sym, | |
5287 | gfc_actual_arglist *actual_args) | |
5288 | { | |
5289 | gfc_actual_arglist *a; | |
5290 | gfc_formal_arglist **f; | |
5291 | gfc_symbol *s; | |
5292 | char name[GFC_MAX_SYMBOL_LEN + 1]; | |
5293 | static int var_num; | |
5294 | ||
5295 | f = &sym->formal; | |
5296 | for (a = actual_args; a != NULL; a = a->next) | |
5297 | { | |
5298 | (*f) = gfc_get_formal_arglist (); | |
5299 | if (a->expr) | |
5300 | { | |
5301 | snprintf (name, GFC_MAX_SYMBOL_LEN, "_formal_%d", var_num ++); | |
5302 | gfc_get_symbol (name, gfc_current_ns, &s); | |
5303 | if (a->expr->ts.type == BT_PROCEDURE) | |
5304 | { | |
5305 | s->attr.flavor = FL_PROCEDURE; | |
5306 | } | |
5307 | else | |
5308 | { | |
5309 | s->ts = a->expr->ts; | |
5310 | ||
5311 | if (s->ts.type == BT_CHARACTER) | |
5312 | s->ts.u.cl = gfc_get_charlen (); | |
5313 | ||
5314 | s->ts.deferred = 0; | |
5315 | s->ts.is_iso_c = 0; | |
5316 | s->ts.is_c_interop = 0; | |
5317 | s->attr.flavor = FL_VARIABLE; | |
5318 | s->attr.artificial = 1; | |
5319 | if (a->expr->rank > 0) | |
5320 | { | |
5321 | s->attr.dimension = 1; | |
5322 | s->as = gfc_get_array_spec (); | |
5323 | s->as->rank = 1; | |
5324 | s->as->lower[0] = gfc_get_int_expr (gfc_index_integer_kind, | |
5325 | &a->expr->where, 1); | |
5326 | s->as->upper[0] = NULL; | |
5327 | s->as->type = AS_ASSUMED_SIZE; | |
5328 | } | |
4a4fc7fe TK |
5329 | else |
5330 | s->maybe_array = maybe_dummy_array_arg (a->expr); | |
e68a35ae TK |
5331 | } |
5332 | s->attr.dummy = 1; | |
e0b9e5f9 | 5333 | s->declared_at = a->expr->where; |
e68a35ae TK |
5334 | s->attr.intent = INTENT_UNKNOWN; |
5335 | (*f)->sym = s; | |
5336 | } | |
5337 | else /* If a->expr is NULL, this is an alternate rerturn. */ | |
5338 | (*f)->sym = NULL; | |
5339 | ||
5340 | f = &((*f)->next); | |
5341 | } | |
5342 | } |