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comparison src/vim9type.c @ 27519:7898c7847293 v8.2.4287

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patch 8.2.4287: cannot assign empty list with type to variable with list type Commit: https://github.com/vim/vim/commit/2d3ac2e03093c4b0ae5d18c5f2f51ae0c2a9ec72 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Feb 3 12:34:05 2022 +0000 patch 8.2.4287: cannot assign empty list with type to variable with list type Problem: Cannot assign empty list with any list type to variable with specific list type. Solution: Use unknown list type for empty list if the specified type is any.
author Bram Moolenaar <Bram@vim.org>
date Thu, 03 Feb 2022 13:45:03 +0100
parents f00a7a2bee21
children 5bf2fca4f967
comparison
equal deleted inserted replaced
27518:67c5f3cebf28 27519:7898c7847293
342 if (tv->v_type == VAR_LIST) 342 if (tv->v_type == VAR_LIST)
343 { 343 {
344 list_T *l = tv->vval.v_list; 344 list_T *l = tv->vval.v_list;
345 listitem_T *li; 345 listitem_T *li;
346 346
347 if (l == NULL || (l->lv_first == NULL && l->lv_type == NULL)) 347 // An empty list has type list<unknown>, unless the type was specified
348 // and is not list<any>. This matters when assigning to a variable
349 // with a specific list type.
350 if (l == NULL || (l->lv_first == NULL
351 && (l->lv_type == NULL || l->lv_type->tt_member == &t_any)))
348 return &t_list_empty; 352 return &t_list_empty;
349 if ((flags & TVTT_DO_MEMBER) == 0) 353 if ((flags & TVTT_DO_MEMBER) == 0)
350 return &t_list_any; 354 return &t_list_any;
351 // If the type is list<any> go through the members, it may end up a 355 // If the type is list<any> go through the members, it may end up a
352 // more specific type. 356 // more specific type.