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, FALSE, NULL) 340 == FAIL) 341 return NULL; 342 if (ufunc->uf_func_type == NULL) 343 set_function_type(ufunc); 344 if (ufunc->uf_func_type != NULL) 345 return ufunc->uf_func_type; 346 } 347 } 348 349 type = get_type_ptr(type_gap); 350 if (type == NULL) 351 return NULL; 352 type->tt_type = tv->v_type; 353 type->tt_argcount = argcount; 354 type->tt_member = member_type; 355 356 return type; 357 } 358 359 /* 360 * Return TRUE if "tv" is not a bool but should be converted to bool. 361 */ 362 int 363 need_convert_to_bool(type_T *type, typval_T *tv) 364 { 365 return type != NULL && type == &t_bool && tv->v_type != VAR_BOOL 366 && (tv->v_type == VAR_NUMBER 367 && (tv->vval.v_number == 0 || tv->vval.v_number == 1)); 368 } 369 370 /* 371 * Get a type_T for a typval_T. 372 * "type_list" is used to temporarily create types in. 373 */ 374 type_T * 375 typval2type(typval_T *tv, garray_T *type_gap) 376 { 377 type_T *type = typval2type_int(tv, type_gap); 378 379 if (type != NULL && type != &t_bool 380 && (tv->v_type == VAR_NUMBER 381 && (tv->vval.v_number == 0 || tv->vval.v_number == 1))) 382 // Number 0 and 1 and expression with "&&" or "||" can also be used for 383 // bool. 384 type = &t_number_bool; 385 return type; 386 } 387 388 /* 389 * Get a type_T for a typval_T, used for v: variables. 390 * "type_list" is used to temporarily create types in. 391 */ 392 type_T * 393 typval2type_vimvar(typval_T *tv, garray_T *type_gap) 394 { 395 if (tv->v_type == VAR_LIST) // e.g. for v:oldfiles 396 return &t_list_string; 397 if (tv->v_type == VAR_DICT) // e.g. for v:completed_item 398 return &t_dict_any; 399 return typval2type(tv, type_gap); 400 } 401 402 403 /* 404 * Return FAIL if "expected" and "actual" don't match. 405 * When "argidx" > 0 it is included in the error message. 406 */ 407 int 408 check_typval_type(type_T *expected, typval_T *actual_tv, int argidx) 409 { 410 garray_T type_list; 411 type_T *actual_type; 412 int res = FAIL; 413 414 ga_init2(&type_list, sizeof(type_T *), 10); 415 actual_type = typval2type(actual_tv, &type_list); 416 if (actual_type != NULL) 417 res = check_type(expected, actual_type, TRUE, argidx); 418 clear_type_list(&type_list); 419 return res; 420 } 421 422 void 423 type_mismatch(type_T *expected, type_T *actual) 424 { 425 arg_type_mismatch(expected, actual, 0); 426 } 427 428 void 429 arg_type_mismatch(type_T *expected, type_T *actual, int argidx) 430 { 431 char *tofree1, *tofree2; 432 char *typename1 = type_name(expected, &tofree1); 433 char *typename2 = type_name(actual, &tofree2); 434 435 if (argidx > 0) 436 semsg(_(e_argument_nr_type_mismatch_expected_str_but_got_str), 437 argidx, typename1, typename2); 438 else 439 semsg(_(e_type_mismatch_expected_str_but_got_str), 440 typename1, typename2); 441 vim_free(tofree1); 442 vim_free(tofree2); 443 } 444 445 /* 446 * Check if the expected and actual types match. 447 * Does not allow for assigning "any" to a specific type. 448 * When "argidx" > 0 it is included in the error message. 449 */ 450 int 451 check_type(type_T *expected, type_T *actual, int give_msg, int argidx) 452 { 453 int ret = OK; 454 455 // When expected is "unknown" we accept any actual type. 456 // When expected is "any" we accept any actual type except "void". 457 if (expected->tt_type != VAR_UNKNOWN 458 && !(expected->tt_type == VAR_ANY && actual->tt_type != VAR_VOID)) 459 460 { 461 // tt_type should match, except that a "partial" can be assigned to a 462 // variable with type "func". 463 if (!(expected->tt_type == actual->tt_type 464 || (expected->tt_type == VAR_FUNC 465 && actual->tt_type == VAR_PARTIAL))) 466 { 467 if (expected->tt_type == VAR_BOOL 468 && (actual->tt_flags & TTFLAG_BOOL_OK)) 469 // Using number 0 or 1 for bool is OK. 470 return OK; 471 if (give_msg) 472 arg_type_mismatch(expected, actual, argidx); 473 return FAIL; 474 } 475 if (expected->tt_type == VAR_DICT || expected->tt_type == VAR_LIST) 476 { 477 // "unknown" is used for an empty list or dict 478 if (actual->tt_member != &t_unknown) 479 ret = check_type(expected->tt_member, actual->tt_member, 480 FALSE, 0); 481 } 482 else if (expected->tt_type == VAR_FUNC) 483 { 484 // If the return type is unknown it can be anything, including 485 // nothing, thus there is no point in checking. 486 if (expected->tt_member != &t_unknown 487 && actual->tt_member != &t_unknown) 488 ret = check_type(expected->tt_member, actual->tt_member, 489 FALSE, 0); 490 if (ret == OK && expected->tt_argcount != -1 491 && actual->tt_argcount != -1 492 && (actual->tt_argcount < expected->tt_min_argcount 493 || actual->tt_argcount > expected->tt_argcount)) 494 ret = FAIL; 495 if (ret == OK && expected->tt_args != NULL 496 && actual->tt_args != NULL) 497 { 498 int i; 499 500 for (i = 0; i < expected->tt_argcount; ++i) 501 // Allow for using "any" argument type, lambda's have them. 502 if (actual->tt_args[i] != &t_any && check_type( 503 expected->tt_args[i], actual->tt_args[i], FALSE, 0) 504 == FAIL) 505 { 506 ret = FAIL; 507 break; 508 } 509 } 510 } 511 if (ret == FAIL && give_msg) 512 arg_type_mismatch(expected, actual, argidx); 513 } 514 return ret; 515 } 516 517 /* 518 * Check that the arguments of "type" match "argvars[argcount]". 519 * Return OK/FAIL. 520 */ 521 int 522 check_argument_types( 523 type_T *type, 524 typval_T *argvars, 525 int argcount, 526 char_u *name) 527 { 528 int varargs = (type->tt_flags & TTFLAG_VARARGS) ? 1 : 0; 529 int i; 530 531 if (type->tt_type != VAR_FUNC && type->tt_type != VAR_PARTIAL) 532 return OK; // just in case 533 if (argcount < type->tt_min_argcount - varargs) 534 { 535 semsg(_(e_toofewarg), name); 536 return FAIL; 537 } 538 if (!varargs && type->tt_argcount >= 0 && argcount > type->tt_argcount) 539 { 540 semsg(_(e_toomanyarg), name); 541 return FAIL; 542 } 543 if (type->tt_args == NULL) 544 return OK; // cannot check 545 546 547 for (i = 0; i < argcount; ++i) 548 { 549 type_T *expected; 550 551 if (varargs && i >= type->tt_argcount - 1) 552 expected = type->tt_args[type->tt_argcount - 1]->tt_member; 553 else 554 expected = type->tt_args[i]; 555 if (check_typval_type(expected, &argvars[i], i + 1) == FAIL) 556 return FAIL; 557 } 558 return OK; 559 } 560 561 /* 562 * Skip over a type definition and return a pointer to just after it. 563 * When "optional" is TRUE then a leading "?" is accepted. 564 */ 565 char_u * 566 skip_type(char_u *start, int optional) 567 { 568 char_u *p = start; 569 570 if (optional && *p == '?') 571 ++p; 572 while (ASCII_ISALNUM(*p) || *p == '_') 573 ++p; 574 575 // Skip over "<type>"; this is permissive about white space. 576 if (*skipwhite(p) == '<') 577 { 578 p = skipwhite(p); 579 p = skip_type(skipwhite(p + 1), FALSE); 580 p = skipwhite(p); 581 if (*p == '>') 582 ++p; 583 } 584 else if ((*p == '(' || (*p == ':' && VIM_ISWHITE(p[1]))) 585 && STRNCMP("func", start, 4) == 0) 586 { 587 if (*p == '(') 588 { 589 // handle func(args): type 590 ++p; 591 while (*p != ')' && *p != NUL) 592 { 593 char_u *sp = p; 594 595 if (STRNCMP(p, "...", 3) == 0) 596 p += 3; 597 p = skip_type(p, TRUE); 598 if (p == sp) 599 return p; // syntax error 600 if (*p == ',') 601 p = skipwhite(p + 1); 602 } 603 if (*p == ')') 604 { 605 if (p[1] == ':') 606 p = skip_type(skipwhite(p + 2), FALSE); 607 else 608 ++p; 609 } 610 } 611 else 612 { 613 // handle func: return_type 614 p = skip_type(skipwhite(p + 1), FALSE); 615 } 616 } 617 618 return p; 619 } 620 621 /* 622 * Parse the member type: "<type>" and return "type" with the member set. 623 * Use "type_gap" if a new type needs to be added. 624 * Returns NULL in case of failure. 625 */ 626 static type_T * 627 parse_type_member( 628 char_u **arg, 629 type_T *type, 630 garray_T *type_gap, 631 int give_error) 632 { 633 type_T *member_type; 634 int prev_called_emsg = called_emsg; 635 636 if (**arg != '<') 637 { 638 if (give_error) 639 { 640 if (*skipwhite(*arg) == '<') 641 semsg(_(e_no_white_space_allowed_before_str), "<"); 642 else 643 emsg(_(e_missing_type)); 644 } 645 return NULL; 646 } 647 *arg = skipwhite(*arg + 1); 648 649 member_type = parse_type(arg, type_gap, give_error); 650 if (member_type == NULL) 651 return NULL; 652 653 *arg = skipwhite(*arg); 654 if (**arg != '>' && called_emsg == prev_called_emsg) 655 { 656 if (give_error) 657 emsg(_(e_missing_gt_after_type)); 658 return NULL; 659 } 660 ++*arg; 661 662 if (type->tt_type == VAR_LIST) 663 return get_list_type(member_type, type_gap); 664 return get_dict_type(member_type, type_gap); 665 } 666 667 /* 668 * Parse a type at "arg" and advance over it. 669 * When "give_error" is TRUE give error messages, otherwise be quiet. 670 * Return NULL for failure. 671 */ 672 type_T * 673 parse_type(char_u **arg, garray_T *type_gap, int give_error) 674 { 675 char_u *p = *arg; 676 size_t len; 677 678 // skip over the first word 679 while (ASCII_ISALNUM(*p) || *p == '_') 680 ++p; 681 len = p - *arg; 682 683 switch (**arg) 684 { 685 case 'a': 686 if (len == 3 && STRNCMP(*arg, "any", len) == 0) 687 { 688 *arg += len; 689 return &t_any; 690 } 691 break; 692 case 'b': 693 if (len == 4 && STRNCMP(*arg, "bool", len) == 0) 694 { 695 *arg += len; 696 return &t_bool; 697 } 698 if (len == 4 && STRNCMP(*arg, "blob", len) == 0) 699 { 700 *arg += len; 701 return &t_blob; 702 } 703 break; 704 case 'c': 705 if (len == 7 && STRNCMP(*arg, "channel", len) == 0) 706 { 707 *arg += len; 708 return &t_channel; 709 } 710 break; 711 case 'd': 712 if (len == 4 && STRNCMP(*arg, "dict", len) == 0) 713 { 714 *arg += len; 715 return parse_type_member(arg, &t_dict_any, 716 type_gap, give_error); 717 } 718 break; 719 case 'f': 720 if (len == 5 && STRNCMP(*arg, "float", len) == 0) 721 { 722 #ifdef FEAT_FLOAT 723 *arg += len; 724 return &t_float; 725 #else 726 if (give_error) 727 emsg(_(e_this_vim_is_not_compiled_with_float_support)); 728 return NULL; 729 #endif 730 } 731 if (len == 4 && STRNCMP(*arg, "func", len) == 0) 732 { 733 type_T *type; 734 type_T *ret_type = &t_unknown; 735 int argcount = -1; 736 int flags = 0; 737 int first_optional = -1; 738 type_T *arg_type[MAX_FUNC_ARGS + 1]; 739 740 // func({type}, ...{type}): {type} 741 *arg += len; 742 if (**arg == '(') 743 { 744 // "func" may or may not return a value, "func()" does 745 // not return a value. 746 ret_type = &t_void; 747 748 p = ++*arg; 749 argcount = 0; 750 while (*p != NUL && *p != ')') 751 { 752 if (*p == '?') 753 { 754 if (first_optional == -1) 755 first_optional = argcount; 756 ++p; 757 } 758 else if (STRNCMP(p, "...", 3) == 0) 759 { 760 flags |= TTFLAG_VARARGS; 761 p += 3; 762 } 763 else if (first_optional != -1) 764 { 765 if (give_error) 766 emsg(_(e_mandatory_argument_after_optional_argument)); 767 return NULL; 768 } 769 770 type = parse_type(&p, type_gap, give_error); 771 if (type == NULL) 772 return NULL; 773 arg_type[argcount++] = type; 774 775 // Nothing comes after "...{type}". 776 if (flags & TTFLAG_VARARGS) 777 break; 778 779 if (*p != ',' && *skipwhite(p) == ',') 780 { 781 if (give_error) 782 semsg(_(e_no_white_space_allowed_before_str), ","); 783 return NULL; 784 } 785 if (*p == ',') 786 { 787 ++p; 788 if (!VIM_ISWHITE(*p)) 789 { 790 if (give_error) 791 semsg(_(e_white_space_required_after_str), ","); 792 return NULL; 793 } 794 } 795 p = skipwhite(p); 796 if (argcount == MAX_FUNC_ARGS) 797 { 798 if (give_error) 799 emsg(_(e_too_many_argument_types)); 800 return NULL; 801 } 802 } 803 804 p = skipwhite(p); 805 if (*p != ')') 806 { 807 if (give_error) 808 emsg(_(e_missing_close)); 809 return NULL; 810 } 811 *arg = p + 1; 812 } 813 if (**arg == ':') 814 { 815 // parse return type 816 ++*arg; 817 if (!VIM_ISWHITE(**arg) && give_error) 818 semsg(_(e_white_space_required_after_str), ":"); 819 *arg = skipwhite(*arg); 820 ret_type = parse_type(arg, type_gap, give_error); 821 if (ret_type == NULL) 822 return NULL; 823 } 824 if (flags == 0 && first_optional == -1 && argcount <= 0) 825 type = get_func_type(ret_type, argcount, type_gap); 826 else 827 { 828 type = alloc_func_type(ret_type, argcount, type_gap); 829 type->tt_flags = flags; 830 if (argcount > 0) 831 { 832 type->tt_argcount = argcount; 833 type->tt_min_argcount = first_optional == -1 834 ? argcount : first_optional; 835 if (func_type_add_arg_types(type, argcount, 836 type_gap) == FAIL) 837 return NULL; 838 mch_memmove(type->tt_args, arg_type, 839 sizeof(type_T *) * argcount); 840 } 841 } 842 return type; 843 } 844 break; 845 case 'j': 846 if (len == 3 && STRNCMP(*arg, "job", len) == 0) 847 { 848 *arg += len; 849 return &t_job; 850 } 851 break; 852 case 'l': 853 if (len == 4 && STRNCMP(*arg, "list", len) == 0) 854 { 855 *arg += len; 856 return parse_type_member(arg, &t_list_any, 857 type_gap, give_error); 858 } 859 break; 860 case 'n': 861 if (len == 6 && STRNCMP(*arg, "number", len) == 0) 862 { 863 *arg += len; 864 return &t_number; 865 } 866 break; 867 case 's': 868 if (len == 6 && STRNCMP(*arg, "string", len) == 0) 869 { 870 *arg += len; 871 return &t_string; 872 } 873 break; 874 case 'v': 875 if (len == 4 && STRNCMP(*arg, "void", len) == 0) 876 { 877 *arg += len; 878 return &t_void; 879 } 880 break; 881 } 882 883 if (give_error) 884 semsg(_(e_type_not_recognized_str), *arg); 885 return NULL; 886 } 887 888 /* 889 * Check if "type1" and "type2" are exactly the same. 890 */ 891 int 892 equal_type(type_T *type1, type_T *type2) 893 { 894 int i; 895 896 if (type1->tt_type != type2->tt_type) 897 return FALSE; 898 switch (type1->tt_type) 899 { 900 case VAR_UNKNOWN: 901 case VAR_ANY: 902 case VAR_VOID: 903 case VAR_SPECIAL: 904 case VAR_BOOL: 905 case VAR_NUMBER: 906 case VAR_FLOAT: 907 case VAR_STRING: 908 case VAR_BLOB: 909 case VAR_JOB: 910 case VAR_CHANNEL: 911 break; // not composite is always OK 912 case VAR_LIST: 913 case VAR_DICT: 914 return equal_type(type1->tt_member, type2->tt_member); 915 case VAR_FUNC: 916 case VAR_PARTIAL: 917 if (!equal_type(type1->tt_member, type2->tt_member) 918 || type1->tt_argcount != type2->tt_argcount) 919 return FALSE; 920 if (type1->tt_argcount < 0 921 || type1->tt_args == NULL || type2->tt_args == NULL) 922 return TRUE; 923 for (i = 0; i < type1->tt_argcount; ++i) 924 if (!equal_type(type1->tt_args[i], type2->tt_args[i])) 925 return FALSE; 926 return TRUE; 927 } 928 return TRUE; 929 } 930 931 /* 932 * Find the common type of "type1" and "type2" and put it in "dest". 933 * "type2" and "dest" may be the same. 934 */ 935 void 936 common_type(type_T *type1, type_T *type2, type_T **dest, garray_T *type_gap) 937 { 938 if (equal_type(type1, type2)) 939 { 940 *dest = type1; 941 return; 942 } 943 944 // If either is VAR_UNKNOWN use the other type. An empty list/dict has no 945 // specific type. 946 if (type1->tt_type == VAR_UNKNOWN) 947 { 948 *dest = type2; 949 return; 950 } 951 if (type2->tt_type == VAR_UNKNOWN) 952 { 953 *dest = type1; 954 return; 955 } 956 957 if (type1->tt_type == type2->tt_type) 958 { 959 if (type1->tt_type == VAR_LIST || type2->tt_type == VAR_DICT) 960 { 961 type_T *common; 962 963 common_type(type1->tt_member, type2->tt_member, &common, type_gap); 964 if (type1->tt_type == VAR_LIST) 965 *dest = get_list_type(common, type_gap); 966 else 967 *dest = get_dict_type(common, type_gap); 968 return; 969 } 970 if (type1->tt_type == VAR_FUNC) 971 { 972 type_T *common; 973 974 common_type(type1->tt_member, type2->tt_member, &common, type_gap); 975 if (type1->tt_argcount == type2->tt_argcount 976 && type1->tt_argcount >= 0) 977 { 978 int argcount = type1->tt_argcount; 979 int i; 980 981 *dest = alloc_func_type(common, argcount, type_gap); 982 if (type1->tt_args != NULL && type2->tt_args != NULL) 983 { 984 if (func_type_add_arg_types(*dest, argcount, 985 type_gap) == OK) 986 for (i = 0; i < argcount; ++i) 987 common_type(type1->tt_args[i], type2->tt_args[i], 988 &(*dest)->tt_args[i], type_gap); 989 } 990 } 991 else 992 *dest = alloc_func_type(common, -1, type_gap); 993 // Use the minimum of min_argcount. 994 (*dest)->tt_min_argcount = 995 type1->tt_min_argcount < type2->tt_min_argcount 996 ? type1->tt_min_argcount : type2->tt_min_argcount; 997 return; 998 } 999 } 1000 1001 *dest = &t_any; 1002 } 1003 1004 /* 1005 * Get the member type of a dict or list from the items on the stack. 1006 * "stack_top" points just after the last type on the type stack. 1007 * For a list "skip" is 1, for a dict "skip" is 2, keys are skipped. 1008 * Returns &t_void for an empty list or dict. 1009 * Otherwise finds the common type of all items. 1010 */ 1011 type_T * 1012 get_member_type_from_stack( 1013 type_T **stack_top, 1014 int count, 1015 int skip, 1016 garray_T *type_gap) 1017 { 1018 int i; 1019 type_T *result; 1020 type_T *type; 1021 1022 // Use "any" for an empty list or dict. 1023 if (count == 0) 1024 return &t_unknown; 1025 1026 // Use the first value type for the list member type, then find the common 1027 // type from following items. 1028 result = *(stack_top -(count * skip) + skip - 1); 1029 for (i = 1; i < count; ++i) 1030 { 1031 if (result == &t_any) 1032 break; // won't get more common 1033 type = *(stack_top -((count - i) * skip) + skip - 1); 1034 common_type(type, result, &result, type_gap); 1035 } 1036 1037 return result; 1038 } 1039 1040 char * 1041 vartype_name(vartype_T type) 1042 { 1043 switch (type) 1044 { 1045 case VAR_UNKNOWN: break; 1046 case VAR_ANY: return "any"; 1047 case VAR_VOID: return "void"; 1048 case VAR_SPECIAL: return "special"; 1049 case VAR_BOOL: return "bool"; 1050 case VAR_NUMBER: return "number"; 1051 case VAR_FLOAT: return "float"; 1052 case VAR_STRING: return "string"; 1053 case VAR_BLOB: return "blob"; 1054 case VAR_JOB: return "job"; 1055 case VAR_CHANNEL: return "channel"; 1056 case VAR_LIST: return "list"; 1057 case VAR_DICT: return "dict"; 1058 1059 case VAR_FUNC: 1060 case VAR_PARTIAL: return "func"; 1061 } 1062 return "unknown"; 1063 } 1064 1065 /* 1066 * Return the name of a type. 1067 * The result may be in allocated memory, in which case "tofree" is set. 1068 */ 1069 char * 1070 type_name(type_T *type, char **tofree) 1071 { 1072 char *name; 1073 1074 *tofree = NULL; 1075 if (type == NULL) 1076 return "[unknown]"; 1077 name = vartype_name(type->tt_type); 1078 if (type->tt_type == VAR_LIST || type->tt_type == VAR_DICT) 1079 { 1080 char *member_free; 1081 char *member_name = type_name(type->tt_member, &member_free); 1082 size_t len; 1083 1084 len = STRLEN(name) + STRLEN(member_name) + 3; 1085 *tofree = alloc(len); 1086 if (*tofree != NULL) 1087 { 1088 vim_snprintf(*tofree, len, "%s<%s>", name, member_name); 1089 vim_free(member_free); 1090 return *tofree; 1091 } 1092 } 1093 if (type->tt_type == VAR_FUNC) 1094 { 1095 garray_T ga; 1096 int i; 1097 int varargs = (type->tt_flags & TTFLAG_VARARGS) ? 1 : 0; 1098 1099 ga_init2(&ga, 1, 100); 1100 if (ga_grow(&ga, 20) == FAIL) 1101 return "[unknown]"; 1102 STRCPY(ga.ga_data, "func("); 1103 ga.ga_len += 5; 1104 1105 for (i = 0; i < type->tt_argcount; ++i) 1106 { 1107 char *arg_free; 1108 char *arg_type; 1109 int len; 1110 1111 if (type->tt_args == NULL) 1112 arg_type = "[unknown]"; 1113 else 1114 arg_type = type_name(type->tt_args[i], &arg_free); 1115 if (i > 0) 1116 { 1117 STRCPY((char *)ga.ga_data + ga.ga_len, ", "); 1118 ga.ga_len += 2; 1119 } 1120 len = (int)STRLEN(arg_type); 1121 if (ga_grow(&ga, len + 8) == FAIL) 1122 { 1123 vim_free(arg_free); 1124 ga_clear(&ga); 1125 return "[unknown]"; 1126 } 1127 if (varargs && i == type->tt_argcount - 1) 1128 ga_concat(&ga, (char_u *)"..."); 1129 else if (i >= type->tt_min_argcount) 1130 *((char *)ga.ga_data + ga.ga_len++) = '?'; 1131 ga_concat(&ga, (char_u *)arg_type); 1132 vim_free(arg_free); 1133 } 1134 if (type->tt_argcount < 0) 1135 // any number of arguments 1136 ga_concat(&ga, (char_u *)"..."); 1137 1138 if (type->tt_member == &t_void) 1139 STRCPY((char *)ga.ga_data + ga.ga_len, ")"); 1140 else 1141 { 1142 char *ret_free; 1143 char *ret_name = type_name(type->tt_member, &ret_free); 1144 int len; 1145 1146 len = (int)STRLEN(ret_name) + 4; 1147 if (ga_grow(&ga, len) == FAIL) 1148 { 1149 vim_free(ret_free); 1150 ga_clear(&ga); 1151 return "[unknown]"; 1152 } 1153 STRCPY((char *)ga.ga_data + ga.ga_len, "): "); 1154 STRCPY((char *)ga.ga_data + ga.ga_len + 3, ret_name); 1155 vim_free(ret_free); 1156 } 1157 *tofree = ga.ga_data; 1158 return ga.ga_data; 1159 } 1160 1161 return name; 1162 } 1163 1164 /* 1165 * "typename(expr)" function 1166 */ 1167 void 1168 f_typename(typval_T *argvars, typval_T *rettv) 1169 { 1170 garray_T type_list; 1171 type_T *type; 1172 char *tofree; 1173 char *name; 1174 1175 rettv->v_type = VAR_STRING; 1176 ga_init2(&type_list, sizeof(type_T *), 10); 1177 type = typval2type(argvars, &type_list); 1178 name = type_name(type, &tofree); 1179 if (tofree != NULL) 1180 rettv->vval.v_string = (char_u *)tofree; 1181 else 1182 { 1183 rettv->vval.v_string = vim_strsave((char_u *)name); 1184 vim_free(tofree); 1185 } 1186 clear_type_list(&type_list); 1187 } 1188 1189 #endif // FEAT_EVAL 1190