1 /* vi:set ts=8 sts=4 sw=4 noet: 2 * 3 * VIM - Vi IMproved by Bram Moolenaar 4 * 5 * Do ":help uganda" in Vim to read copying and usage conditions. 6 * Do ":help credits" in Vim to see a list of people who contributed. 7 * See README.txt for an overview of the Vim source code. 8 */ 9 10 /* 11 * vim9type.c: handling of types 12 */ 13 14 #define USING_FLOAT_STUFF 15 #include "vim.h" 16 17 #if defined(FEAT_EVAL) || defined(PROTO) 18 19 #ifdef VMS 20 # include <float.h> 21 #endif 22 23 /* 24 * Allocate memory for a type_T and add the pointer to type_gap, so that it can 25 * be easily freed later. 26 */ 27 type_T * 28 get_type_ptr(garray_T *type_gap) 29 { 30 type_T *type; 31 32 if (ga_grow(type_gap, 1) == FAIL) 33 return NULL; 34 type = ALLOC_CLEAR_ONE(type_T); 35 if (type != NULL) 36 { 37 ((type_T **)type_gap->ga_data)[type_gap->ga_len] = type; 38 ++type_gap->ga_len; 39 } 40 return type; 41 } 42 43 void 44 clear_type_list(garray_T *gap) 45 { 46 while (gap->ga_len > 0) 47 vim_free(((type_T **)gap->ga_data)[--gap->ga_len]); 48 ga_clear(gap); 49 } 50 51 /* 52 * Take a type that is using entries in a growarray and turn it into a type 53 * with allocated entries. 54 */ 55 type_T * 56 alloc_type(type_T *type) 57 { 58 type_T *ret; 59 60 if (type == NULL) 61 return NULL; 62 63 // A fixed type never contains allocated types, return as-is. 64 if (type->tt_flags & TTFLAG_STATIC) 65 return type; 66 67 ret = ALLOC_ONE(type_T); 68 *ret = *type; 69 70 if (ret->tt_member != NULL) 71 ret->tt_member = alloc_type(ret->tt_member); 72 if (type->tt_args != NULL) 73 { 74 int i; 75 76 ret->tt_args = ALLOC_MULT(type_T *, type->tt_argcount); 77 if (ret->tt_args != NULL) 78 for (i = 0; i < type->tt_argcount; ++i) 79 ret->tt_args[i] = alloc_type(type->tt_args[i]); 80 } 81 82 return ret; 83 } 84 85 /* 86 * Free a type that was created with alloc_type(). 87 */ 88 void 89 free_type(type_T *type) 90 { 91 int i; 92 93 if (type == NULL || (type->tt_flags & TTFLAG_STATIC)) 94 return; 95 if (type->tt_args != NULL) 96 { 97 for (i = 0; i < type->tt_argcount; ++i) 98 free_type(type->tt_args[i]); 99 vim_free(type->tt_args); 100 } 101 free_type(type->tt_member); 102 vim_free(type); 103 } 104 105 type_T * 106 get_list_type(type_T *member_type, garray_T *type_gap) 107 { 108 type_T *type; 109 110 // recognize commonly used types 111 if (member_type == NULL || member_type->tt_type == VAR_ANY) 112 return &t_list_any; 113 if (member_type->tt_type == VAR_VOID 114 || member_type->tt_type == VAR_UNKNOWN) 115 return &t_list_empty; 116 if (member_type->tt_type == VAR_BOOL) 117 return &t_list_bool; 118 if (member_type->tt_type == VAR_NUMBER) 119 return &t_list_number; 120 if (member_type->tt_type == VAR_STRING) 121 return &t_list_string; 122 123 // Not a common type, create a new entry. 124 type = get_type_ptr(type_gap); 125 if (type == NULL) 126 return &t_any; 127 type->tt_type = VAR_LIST; 128 type->tt_member = member_type; 129 type->tt_argcount = 0; 130 type->tt_args = NULL; 131 return type; 132 } 133 134 type_T * 135 get_dict_type(type_T *member_type, garray_T *type_gap) 136 { 137 type_T *type; 138 139 // recognize commonly used types 140 if (member_type == NULL || member_type->tt_type == VAR_ANY) 141 return &t_dict_any; 142 if (member_type->tt_type == VAR_VOID 143 || member_type->tt_type == VAR_UNKNOWN) 144 return &t_dict_empty; 145 if (member_type->tt_type == VAR_BOOL) 146 return &t_dict_bool; 147 if (member_type->tt_type == VAR_NUMBER) 148 return &t_dict_number; 149 if (member_type->tt_type == VAR_STRING) 150 return &t_dict_string; 151 152 // Not a common type, create a new entry. 153 type = get_type_ptr(type_gap); 154 if (type == NULL) 155 return &t_any; 156 type->tt_type = VAR_DICT; 157 type->tt_member = member_type; 158 type->tt_argcount = 0; 159 type->tt_args = NULL; 160 return type; 161 } 162 163 /* 164 * Allocate a new type for a function. 165 */ 166 type_T * 167 alloc_func_type(type_T *ret_type, int argcount, garray_T *type_gap) 168 { 169 type_T *type = get_type_ptr(type_gap); 170 171 if (type == NULL) 172 return &t_any; 173 type->tt_type = VAR_FUNC; 174 type->tt_member = ret_type; 175 type->tt_argcount = argcount; 176 type->tt_args = NULL; 177 return type; 178 } 179 180 /* 181 * Get a function type, based on the return type "ret_type". 182 * If "argcount" is -1 or 0 a predefined type can be used. 183 * If "argcount" > 0 always create a new type, so that arguments can be added. 184 */ 185 type_T * 186 get_func_type(type_T *ret_type, int argcount, garray_T *type_gap) 187 { 188 // recognize commonly used types 189 if (argcount <= 0) 190 { 191 if (ret_type == &t_unknown) 192 { 193 // (argcount == 0) is not possible 194 return &t_func_unknown; 195 } 196 if (ret_type == &t_void) 197 { 198 if (argcount == 0) 199 return &t_func_0_void; 200 else 201 return &t_func_void; 202 } 203 if (ret_type == &t_any) 204 { 205 if (argcount == 0) 206 return &t_func_0_any; 207 else 208 return &t_func_any; 209 } 210 if (ret_type == &t_number) 211 { 212 if (argcount == 0) 213 return &t_func_0_number; 214 else 215 return &t_func_number; 216 } 217 if (ret_type == &t_string) 218 { 219 if (argcount == 0) 220 return &t_func_0_string; 221 else 222 return &t_func_string; 223 } 224 } 225 226 return alloc_func_type(ret_type, argcount, type_gap); 227 } 228 229 /* 230 * For a function type, reserve space for "argcount" argument types (including 231 * vararg). 232 */ 233 int 234 func_type_add_arg_types( 235 type_T *functype, 236 int argcount, 237 garray_T *type_gap) 238 { 239 // To make it easy to free the space needed for the argument types, add the 240 // pointer to type_gap. 241 if (ga_grow(type_gap, 1) == FAIL) 242 return FAIL; 243 functype->tt_args = ALLOC_CLEAR_MULT(type_T *, argcount); 244 if (functype->tt_args == NULL) 245 return FAIL; 246 ((type_T **)type_gap->ga_data)[type_gap->ga_len] = 247 (void *)functype->tt_args; 248 ++type_gap->ga_len; 249 return OK; 250 } 251 252 /* 253 * Get a type_T for a typval_T. 254 * "type_gap" is used to temporarily create types in. 255 */ 256 static type_T * 257 typval2type_int(typval_T *tv, garray_T *type_gap) 258 { 259 type_T *type; 260 type_T *member_type = &t_any; 261 int argcount = 0; 262 263 if (tv->v_type == VAR_NUMBER) 264 return &t_number; 265 if (tv->v_type == VAR_BOOL) 266 return &t_bool; 267 if (tv->v_type == VAR_STRING) 268 return &t_string; 269 270 if (tv->v_type == VAR_LIST) 271 { 272 list_T *l = tv->vval.v_list; 273 listitem_T *li; 274 275 if (l == NULL || l->lv_first == NULL) 276 return &t_list_empty; 277 if (l->lv_first == &range_list_item) 278 return &t_list_number; 279 280 // Use the common type of all members. 281 member_type = typval2type(&l->lv_first->li_tv, type_gap); 282 for (li = l->lv_first->li_next; li != NULL; li = li->li_next) 283 common_type(typval2type(&li->li_tv, type_gap), 284 member_type, &member_type, type_gap); 285 return get_list_type(member_type, type_gap); 286 } 287 288 if (tv->v_type == VAR_DICT) 289 { 290 dict_iterator_T iter; 291 typval_T *value; 292 293 if (tv->vval.v_dict == NULL 294 || tv->vval.v_dict->dv_hashtab.ht_used == 0) 295 return &t_dict_empty; 296 297 // Use the common type of all values. 298 dict_iterate_start(tv, &iter); 299 dict_iterate_next(&iter, &value); 300 member_type = typval2type(value, type_gap); 301 while (dict_iterate_next(&iter, &value) != NULL) 302 common_type(typval2type(value, type_gap), 303 member_type, &member_type, type_gap); 304 return get_dict_type(member_type, type_gap); 305 } 306 307 if (tv->v_type == VAR_FUNC || tv->v_type == VAR_PARTIAL) 308 { 309 char_u *name = NULL; 310 ufunc_T *ufunc = NULL; 311 312 if (tv->v_type == VAR_PARTIAL) 313 { 314 if (tv->vval.v_partial->pt_func != NULL) 315 ufunc = tv->vval.v_partial->pt_func; 316 else 317 name = tv->vval.v_partial->pt_name; 318 } 319 else 320 name = tv->vval.v_string; 321 if (name != NULL) 322 { 323 int idx = find_internal_func(name); 324 325 if (idx >= 0) 326 { 327 // TODO: get actual arg count and types 328 argcount = -1; 329 member_type = internal_func_ret_type(idx, 0, NULL); 330 } 331 else 332 ufunc = find_func(name, FALSE, NULL); 333 } 334 if (ufunc != NULL) 335 { 336 // May need to get the argument types from default values by 337 // compiling the function. 338 if (ufunc->uf_def_status == UF_TO_BE_COMPILED 339 && compile_def_function(ufunc, TRUE, NULL) == FAIL) 340 return NULL; 341 if (ufunc->uf_func_type != NULL) 342 return ufunc->uf_func_type; 343 } 344 } 345 346 type = get_type_ptr(type_gap); 347 if (type == NULL) 348 return NULL; 349 type->tt_type = tv->v_type; 350 type->tt_argcount = argcount; 351 type->tt_member = member_type; 352 353 return type; 354 } 355 356 /* 357 * Return TRUE if "tv" is not a bool but should be converted to bool. 358 */ 359 int 360 need_convert_to_bool(type_T *type, typval_T *tv) 361 { 362 return type != NULL && type == &t_bool && tv->v_type != VAR_BOOL 363 && (tv->v_type == VAR_NUMBER 364 && (tv->vval.v_number == 0 || tv->vval.v_number == 1)); 365 } 366 367 /* 368 * Get a type_T for a typval_T. 369 * "type_list" is used to temporarily create types in. 370 */ 371 type_T * 372 typval2type(typval_T *tv, garray_T *type_gap) 373 { 374 type_T *type = typval2type_int(tv, type_gap); 375 376 if (type != NULL && type != &t_bool 377 && (tv->v_type == VAR_NUMBER 378 && (tv->vval.v_number == 0 || tv->vval.v_number == 1))) 379 { 380 type_T *newtype = get_type_ptr(type_gap); 381 382 // Number 0 and 1 and expression with "&&" or "||" can also be used 383 // for bool. 384 if (newtype != NULL) 385 { 386 *newtype = *type; 387 newtype->tt_flags = TTFLAG_BOOL_OK; 388 type = newtype; 389 } 390 } 391 return type; 392 } 393 394 /* 395 * Get a type_T for a typval_T, used for v: variables. 396 * "type_list" is used to temporarily create types in. 397 */ 398 type_T * 399 typval2type_vimvar(typval_T *tv, garray_T *type_gap) 400 { 401 if (tv->v_type == VAR_LIST) // e.g. for v:oldfiles 402 return &t_list_string; 403 if (tv->v_type == VAR_DICT) // e.g. for v:completed_item 404 return &t_dict_any; 405 return typval2type(tv, type_gap); 406 } 407 408 409 /* 410 * Return FAIL if "expected" and "actual" don't match. 411 * When "argidx" > 0 it is included in the error message. 412 */ 413 int 414 check_typval_type(type_T *expected, typval_T *actual_tv, int argidx) 415 { 416 garray_T type_list; 417 type_T *actual_type; 418 int res = FAIL; 419 420 ga_init2(&type_list, sizeof(type_T *), 10); 421 actual_type = typval2type(actual_tv, &type_list); 422 if (actual_type != NULL) 423 res = check_type(expected, actual_type, TRUE, argidx); 424 clear_type_list(&type_list); 425 return res; 426 } 427 428 void 429 type_mismatch(type_T *expected, type_T *actual) 430 { 431 arg_type_mismatch(expected, actual, 0); 432 } 433 434 void 435 arg_type_mismatch(type_T *expected, type_T *actual, int argidx) 436 { 437 char *tofree1, *tofree2; 438 char *typename1 = type_name(expected, &tofree1); 439 char *typename2 = type_name(actual, &tofree2); 440 441 if (argidx > 0) 442 semsg(_(e_argument_nr_type_mismatch_expected_str_but_got_str), 443 argidx, typename1, typename2); 444 else 445 semsg(_(e_type_mismatch_expected_str_but_got_str), 446 typename1, typename2); 447 vim_free(tofree1); 448 vim_free(tofree2); 449 } 450 451 /* 452 * Check if the expected and actual types match. 453 * Does not allow for assigning "any" to a specific type. 454 * When "argidx" > 0 it is included in the error message. 455 */ 456 int 457 check_type(type_T *expected, type_T *actual, int give_msg, int argidx) 458 { 459 int ret = OK; 460 461 // When expected is "unknown" we accept any actual type. 462 // When expected is "any" we accept any actual type except "void". 463 if (expected->tt_type != VAR_UNKNOWN 464 && !(expected->tt_type == VAR_ANY && actual->tt_type != VAR_VOID)) 465 466 { 467 // tt_type should match, except that a "partial" can be assigned to a 468 // variable with type "func". 469 if (!(expected->tt_type == actual->tt_type 470 || (expected->tt_type == VAR_FUNC 471 && actual->tt_type == VAR_PARTIAL))) 472 { 473 if (expected->tt_type == VAR_BOOL 474 && (actual->tt_flags & TTFLAG_BOOL_OK)) 475 // Using number 0 or 1 for bool is OK. 476 return OK; 477 if (give_msg) 478 arg_type_mismatch(expected, actual, argidx); 479 return FAIL; 480 } 481 if (expected->tt_type == VAR_DICT || expected->tt_type == VAR_LIST) 482 { 483 // "unknown" is used for an empty list or dict 484 if (actual->tt_member != &t_unknown) 485 ret = check_type(expected->tt_member, actual->tt_member, 486 FALSE, 0); 487 } 488 else if (expected->tt_type == VAR_FUNC) 489 { 490 if (expected->tt_member != &t_unknown) 491 ret = check_type(expected->tt_member, actual->tt_member, 492 FALSE, 0); 493 if (ret == OK && expected->tt_argcount != -1 494 && actual->tt_argcount != -1 495 && (actual->tt_argcount < expected->tt_min_argcount 496 || actual->tt_argcount > expected->tt_argcount)) 497 ret = FAIL; 498 if (expected->tt_args != NULL && actual->tt_args != NULL) 499 { 500 int i; 501 502 for (i = 0; i < expected->tt_argcount; ++i) 503 // Allow for using "any" argument type, lambda's have them. 504 if (actual->tt_args[i] != &t_any && check_type( 505 expected->tt_args[i], actual->tt_args[i], FALSE, 0) 506 == FAIL) 507 { 508 ret = FAIL; 509 break; 510 } 511 } 512 } 513 if (ret == FAIL && give_msg) 514 arg_type_mismatch(expected, actual, argidx); 515 } 516 return ret; 517 } 518 519 /* 520 * Skip over a type definition and return a pointer to just after it. 521 * When "optional" is TRUE then a leading "?" is accepted. 522 */ 523 char_u * 524 skip_type(char_u *start, int optional) 525 { 526 char_u *p = start; 527 528 if (optional && *p == '?') 529 ++p; 530 while (ASCII_ISALNUM(*p) || *p == '_') 531 ++p; 532 533 // Skip over "<type>"; this is permissive about white space. 534 if (*skipwhite(p) == '<') 535 { 536 p = skipwhite(p); 537 p = skip_type(skipwhite(p + 1), FALSE); 538 p = skipwhite(p); 539 if (*p == '>') 540 ++p; 541 } 542 else if ((*p == '(' || (*p == ':' && VIM_ISWHITE(p[1]))) 543 && STRNCMP("func", start, 4) == 0) 544 { 545 if (*p == '(') 546 { 547 // handle func(args): type 548 ++p; 549 while (*p != ')' && *p != NUL) 550 { 551 char_u *sp = p; 552 553 if (STRNCMP(p, "...", 3) == 0) 554 p += 3; 555 p = skip_type(p, TRUE); 556 if (p == sp) 557 return p; // syntax error 558 if (*p == ',') 559 p = skipwhite(p + 1); 560 } 561 if (*p == ')') 562 { 563 if (p[1] == ':') 564 p = skip_type(skipwhite(p + 2), FALSE); 565 else 566 ++p; 567 } 568 } 569 else 570 { 571 // handle func: return_type 572 p = skip_type(skipwhite(p + 1), FALSE); 573 } 574 } 575 576 return p; 577 } 578 579 /* 580 * Parse the member type: "<type>" and return "type" with the member set. 581 * Use "type_gap" if a new type needs to be added. 582 * Returns NULL in case of failure. 583 */ 584 static type_T * 585 parse_type_member(char_u **arg, type_T *type, garray_T *type_gap) 586 { 587 type_T *member_type; 588 int prev_called_emsg = called_emsg; 589 590 if (**arg != '<') 591 { 592 if (*skipwhite(*arg) == '<') 593 semsg(_(e_no_white_space_allowed_before_str), "<"); 594 else 595 emsg(_(e_missing_type)); 596 return type; 597 } 598 *arg = skipwhite(*arg + 1); 599 600 member_type = parse_type(arg, type_gap); 601 602 *arg = skipwhite(*arg); 603 if (**arg != '>' && called_emsg == prev_called_emsg) 604 { 605 emsg(_(e_missing_gt_after_type)); 606 return type; 607 } 608 ++*arg; 609 610 if (type->tt_type == VAR_LIST) 611 return get_list_type(member_type, type_gap); 612 return get_dict_type(member_type, type_gap); 613 } 614 615 /* 616 * Parse a type at "arg" and advance over it. 617 * Return &t_any for failure. 618 */ 619 type_T * 620 parse_type(char_u **arg, garray_T *type_gap) 621 { 622 char_u *p = *arg; 623 size_t len; 624 625 // skip over the first word 626 while (ASCII_ISALNUM(*p) || *p == '_') 627 ++p; 628 len = p - *arg; 629 630 switch (**arg) 631 { 632 case 'a': 633 if (len == 3 && STRNCMP(*arg, "any", len) == 0) 634 { 635 *arg += len; 636 return &t_any; 637 } 638 break; 639 case 'b': 640 if (len == 4 && STRNCMP(*arg, "bool", len) == 0) 641 { 642 *arg += len; 643 return &t_bool; 644 } 645 if (len == 4 && STRNCMP(*arg, "blob", len) == 0) 646 { 647 *arg += len; 648 return &t_blob; 649 } 650 break; 651 case 'c': 652 if (len == 7 && STRNCMP(*arg, "channel", len) == 0) 653 { 654 *arg += len; 655 return &t_channel; 656 } 657 break; 658 case 'd': 659 if (len == 4 && STRNCMP(*arg, "dict", len) == 0) 660 { 661 *arg += len; 662 return parse_type_member(arg, &t_dict_any, type_gap); 663 } 664 break; 665 case 'f': 666 if (len == 5 && STRNCMP(*arg, "float", len) == 0) 667 { 668 #ifdef FEAT_FLOAT 669 *arg += len; 670 return &t_float; 671 #else 672 emsg(_(e_this_vim_is_not_compiled_with_float_support)); 673 return &t_any; 674 #endif 675 } 676 if (len == 4 && STRNCMP(*arg, "func", len) == 0) 677 { 678 type_T *type; 679 type_T *ret_type = &t_unknown; 680 int argcount = -1; 681 int flags = 0; 682 int first_optional = -1; 683 type_T *arg_type[MAX_FUNC_ARGS + 1]; 684 685 // func({type}, ...{type}): {type} 686 *arg += len; 687 if (**arg == '(') 688 { 689 // "func" may or may not return a value, "func()" does 690 // not return a value. 691 ret_type = &t_void; 692 693 p = ++*arg; 694 argcount = 0; 695 while (*p != NUL && *p != ')') 696 { 697 if (*p == '?') 698 { 699 if (first_optional == -1) 700 first_optional = argcount; 701 ++p; 702 } 703 else if (STRNCMP(p, "...", 3) == 0) 704 { 705 flags |= TTFLAG_VARARGS; 706 p += 3; 707 } 708 else if (first_optional != -1) 709 { 710 emsg(_(e_mandatory_argument_after_optional_argument)); 711 return &t_any; 712 } 713 714 arg_type[argcount++] = parse_type(&p, type_gap); 715 716 // Nothing comes after "...{type}". 717 if (flags & TTFLAG_VARARGS) 718 break; 719 720 if (*p != ',' && *skipwhite(p) == ',') 721 { 722 semsg(_(e_no_white_space_allowed_before_str), ","); 723 return &t_any; 724 } 725 if (*p == ',') 726 { 727 ++p; 728 if (!VIM_ISWHITE(*p)) 729 { 730 semsg(_(e_white_space_required_after_str), ","); 731 return &t_any; 732 } 733 } 734 p = skipwhite(p); 735 if (argcount == MAX_FUNC_ARGS) 736 { 737 emsg(_(e_too_many_argument_types)); 738 return &t_any; 739 } 740 } 741 742 p = skipwhite(p); 743 if (*p != ')') 744 { 745 emsg(_(e_missing_close)); 746 return &t_any; 747 } 748 *arg = p + 1; 749 } 750 if (**arg == ':') 751 { 752 // parse return type 753 ++*arg; 754 if (!VIM_ISWHITE(**arg)) 755 semsg(_(e_white_space_required_after_str), ":"); 756 *arg = skipwhite(*arg); 757 ret_type = parse_type(arg, type_gap); 758 } 759 if (flags == 0 && first_optional == -1 && argcount <= 0) 760 type = get_func_type(ret_type, argcount, type_gap); 761 else 762 { 763 type = alloc_func_type(ret_type, argcount, type_gap); 764 type->tt_flags = flags; 765 if (argcount > 0) 766 { 767 type->tt_argcount = argcount; 768 type->tt_min_argcount = first_optional == -1 769 ? argcount : first_optional; 770 if (func_type_add_arg_types(type, argcount, 771 type_gap) == FAIL) 772 return &t_any; 773 mch_memmove(type->tt_args, arg_type, 774 sizeof(type_T *) * argcount); 775 } 776 } 777 return type; 778 } 779 break; 780 case 'j': 781 if (len == 3 && STRNCMP(*arg, "job", len) == 0) 782 { 783 *arg += len; 784 return &t_job; 785 } 786 break; 787 case 'l': 788 if (len == 4 && STRNCMP(*arg, "list", len) == 0) 789 { 790 *arg += len; 791 return parse_type_member(arg, &t_list_any, type_gap); 792 } 793 break; 794 case 'n': 795 if (len == 6 && STRNCMP(*arg, "number", len) == 0) 796 { 797 *arg += len; 798 return &t_number; 799 } 800 break; 801 case 's': 802 if (len == 6 && STRNCMP(*arg, "string", len) == 0) 803 { 804 *arg += len; 805 return &t_string; 806 } 807 break; 808 case 'v': 809 if (len == 4 && STRNCMP(*arg, "void", len) == 0) 810 { 811 *arg += len; 812 return &t_void; 813 } 814 break; 815 } 816 817 semsg(_(e_type_not_recognized_str), *arg); 818 return &t_any; 819 } 820 821 /* 822 * Check if "type1" and "type2" are exactly the same. 823 */ 824 static int 825 equal_type(type_T *type1, type_T *type2) 826 { 827 int i; 828 829 if (type1->tt_type != type2->tt_type) 830 return FALSE; 831 switch (type1->tt_type) 832 { 833 case VAR_UNKNOWN: 834 case VAR_ANY: 835 case VAR_VOID: 836 case VAR_SPECIAL: 837 case VAR_BOOL: 838 case VAR_NUMBER: 839 case VAR_FLOAT: 840 case VAR_STRING: 841 case VAR_BLOB: 842 case VAR_JOB: 843 case VAR_CHANNEL: 844 break; // not composite is always OK 845 case VAR_LIST: 846 case VAR_DICT: 847 return equal_type(type1->tt_member, type2->tt_member); 848 case VAR_FUNC: 849 case VAR_PARTIAL: 850 if (!equal_type(type1->tt_member, type2->tt_member) 851 || type1->tt_argcount != type2->tt_argcount) 852 return FALSE; 853 if (type1->tt_argcount < 0 854 || type1->tt_args == NULL || type2->tt_args == NULL) 855 return TRUE; 856 for (i = 0; i < type1->tt_argcount; ++i) 857 if (!equal_type(type1->tt_args[i], type2->tt_args[i])) 858 return FALSE; 859 return TRUE; 860 } 861 return TRUE; 862 } 863 864 /* 865 * Find the common type of "type1" and "type2" and put it in "dest". 866 * "type2" and "dest" may be the same. 867 */ 868 void 869 common_type(type_T *type1, type_T *type2, type_T **dest, garray_T *type_gap) 870 { 871 if (equal_type(type1, type2)) 872 { 873 *dest = type1; 874 return; 875 } 876 877 // If either is VAR_UNKNOWN use the other type. An empty list/dict has no 878 // specific type. 879 if (type1->tt_type == VAR_UNKNOWN) 880 { 881 *dest = type2; 882 return; 883 } 884 if (type2->tt_type == VAR_UNKNOWN) 885 { 886 *dest = type1; 887 return; 888 } 889 890 if (type1->tt_type == type2->tt_type) 891 { 892 if (type1->tt_type == VAR_LIST || type2->tt_type == VAR_DICT) 893 { 894 type_T *common; 895 896 common_type(type1->tt_member, type2->tt_member, &common, type_gap); 897 if (type1->tt_type == VAR_LIST) 898 *dest = get_list_type(common, type_gap); 899 else 900 *dest = get_dict_type(common, type_gap); 901 return; 902 } 903 if (type1->tt_type == VAR_FUNC) 904 { 905 type_T *common; 906 907 common_type(type1->tt_member, type2->tt_member, &common, type_gap); 908 if (type1->tt_argcount == type2->tt_argcount 909 && type1->tt_argcount >= 0) 910 { 911 int argcount = type1->tt_argcount; 912 int i; 913 914 *dest = alloc_func_type(common, argcount, type_gap); 915 if (type1->tt_args != NULL && type2->tt_args != NULL) 916 { 917 if (func_type_add_arg_types(*dest, argcount, 918 type_gap) == OK) 919 for (i = 0; i < argcount; ++i) 920 common_type(type1->tt_args[i], type2->tt_args[i], 921 &(*dest)->tt_args[i], type_gap); 922 } 923 } 924 else 925 *dest = alloc_func_type(common, -1, type_gap); 926 // Use the minimum of min_argcount. 927 (*dest)->tt_min_argcount = 928 type1->tt_min_argcount < type2->tt_min_argcount 929 ? type1->tt_min_argcount : type2->tt_min_argcount; 930 return; 931 } 932 } 933 934 *dest = &t_any; 935 } 936 937 /* 938 * Get the member type of a dict or list from the items on the stack. 939 * "stack_top" points just after the last type on the type stack. 940 * For a list "skip" is 1, for a dict "skip" is 2, keys are skipped. 941 * Returns &t_void for an empty list or dict. 942 * Otherwise finds the common type of all items. 943 */ 944 type_T * 945 get_member_type_from_stack( 946 type_T **stack_top, 947 int count, 948 int skip, 949 garray_T *type_gap) 950 { 951 int i; 952 type_T *result; 953 type_T *type; 954 955 // Use "any" for an empty list or dict. 956 if (count == 0) 957 return &t_unknown; 958 959 // Use the first value type for the list member type, then find the common 960 // type from following items. 961 result = *(stack_top -(count * skip) + skip - 1); 962 for (i = 1; i < count; ++i) 963 { 964 if (result == &t_any) 965 break; // won't get more common 966 type = *(stack_top -((count - i) * skip) + skip - 1); 967 common_type(type, result, &result, type_gap); 968 } 969 970 return result; 971 } 972 973 char * 974 vartype_name(vartype_T type) 975 { 976 switch (type) 977 { 978 case VAR_UNKNOWN: break; 979 case VAR_ANY: return "any"; 980 case VAR_VOID: return "void"; 981 case VAR_SPECIAL: return "special"; 982 case VAR_BOOL: return "bool"; 983 case VAR_NUMBER: return "number"; 984 case VAR_FLOAT: return "float"; 985 case VAR_STRING: return "string"; 986 case VAR_BLOB: return "blob"; 987 case VAR_JOB: return "job"; 988 case VAR_CHANNEL: return "channel"; 989 case VAR_LIST: return "list"; 990 case VAR_DICT: return "dict"; 991 992 case VAR_FUNC: 993 case VAR_PARTIAL: return "func"; 994 } 995 return "unknown"; 996 } 997 998 /* 999 * Return the name of a type. 1000 * The result may be in allocated memory, in which case "tofree" is set. 1001 */ 1002 char * 1003 type_name(type_T *type, char **tofree) 1004 { 1005 char *name = vartype_name(type->tt_type); 1006 1007 *tofree = NULL; 1008 if (type->tt_type == VAR_LIST || type->tt_type == VAR_DICT) 1009 { 1010 char *member_free; 1011 char *member_name = type_name(type->tt_member, &member_free); 1012 size_t len; 1013 1014 len = STRLEN(name) + STRLEN(member_name) + 3; 1015 *tofree = alloc(len); 1016 if (*tofree != NULL) 1017 { 1018 vim_snprintf(*tofree, len, "%s<%s>", name, member_name); 1019 vim_free(member_free); 1020 return *tofree; 1021 } 1022 } 1023 if (type->tt_type == VAR_FUNC) 1024 { 1025 garray_T ga; 1026 int i; 1027 int varargs = (type->tt_flags & TTFLAG_VARARGS) ? 1 : 0; 1028 1029 ga_init2(&ga, 1, 100); 1030 if (ga_grow(&ga, 20) == FAIL) 1031 return "[unknown]"; 1032 STRCPY(ga.ga_data, "func("); 1033 ga.ga_len += 5; 1034 1035 for (i = 0; i < type->tt_argcount; ++i) 1036 { 1037 char *arg_free; 1038 char *arg_type; 1039 int len; 1040 1041 if (type->tt_args == NULL) 1042 arg_type = "[unknown]"; 1043 else 1044 arg_type = type_name(type->tt_args[i], &arg_free); 1045 if (i > 0) 1046 { 1047 STRCPY((char *)ga.ga_data + ga.ga_len, ", "); 1048 ga.ga_len += 2; 1049 } 1050 len = (int)STRLEN(arg_type); 1051 if (ga_grow(&ga, len + 8) == FAIL) 1052 { 1053 vim_free(arg_free); 1054 ga_clear(&ga); 1055 return "[unknown]"; 1056 } 1057 if (varargs && i == type->tt_argcount - 1) 1058 ga_concat(&ga, (char_u *)"..."); 1059 else if (i >= type->tt_min_argcount) 1060 *((char *)ga.ga_data + ga.ga_len++) = '?'; 1061 ga_concat(&ga, (char_u *)arg_type); 1062 vim_free(arg_free); 1063 } 1064 if (type->tt_argcount < 0) 1065 // any number of arguments 1066 ga_concat(&ga, (char_u *)"..."); 1067 1068 if (type->tt_member == &t_void) 1069 STRCPY((char *)ga.ga_data + ga.ga_len, ")"); 1070 else 1071 { 1072 char *ret_free; 1073 char *ret_name = type_name(type->tt_member, &ret_free); 1074 int len; 1075 1076 len = (int)STRLEN(ret_name) + 4; 1077 if (ga_grow(&ga, len) == FAIL) 1078 { 1079 vim_free(ret_free); 1080 ga_clear(&ga); 1081 return "[unknown]"; 1082 } 1083 STRCPY((char *)ga.ga_data + ga.ga_len, "): "); 1084 STRCPY((char *)ga.ga_data + ga.ga_len + 3, ret_name); 1085 vim_free(ret_free); 1086 } 1087 *tofree = ga.ga_data; 1088 return ga.ga_data; 1089 } 1090 1091 return name; 1092 } 1093 1094 #endif // FEAT_EVAL 1095