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patch 9.0.1436: cannot compare a typed variable with v:none

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Problem:    Cannot compare a typed variable with v:none.
Solution:   Allow for "x is v:none" and "x isnot v:none". (issue #12194)
This commit is contained in:
Bram Moolenaar
2023-04-01 22:05:38 +01:00
parent 38d867f041
commit 2ed57ac367
4 changed files with 48 additions and 9 deletions
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10
src/vim9execute.c
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@@ -3496,7 +3496,15 @@ exec_instructions(ectx_T *ectx)
case ISN_LOAD:
if (GA_GROW_FAILS(&ectx->ec_stack, 1))
goto theend;
copy_tv(STACK_TV_VAR(iptr->isn_arg.number), STACK_TV_BOT(0));
tv = STACK_TV_VAR(iptr->isn_arg.number);
if (tv->v_type == VAR_UNKNOWN)
{
// missing argument or default value v:none
STACK_TV_BOT(0)->v_type = VAR_SPECIAL;
STACK_TV_BOT(0)->vval.v_number = VVAL_NONE;
}
else
copy_tv(tv, STACK_TV_BOT(0));
++ectx->ec_stack.ga_len;
break;