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patch 8.2.4534: Vim9: "is" operator with empty string and null returns true

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Problem:    Vim9: "is" operator with empty string and null returns true.
Solution:   Consider empty string and null to be different for "is".
This commit is contained in:
Bram Moolenaar
2022-03-10 12:20:53 +00:00
parent 56b84b1728
commit f8691004b0
4 changed files with 27 additions and 5 deletions
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18
src/typval.c
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@@ -1583,9 +1583,23 @@ typval_compare_string(
i = ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2);
switch (type)
{
case EXPR_IS:
case EXPR_IS: if (in_vim9script())
{
// Really check it is the same string, not just
// the same value.
val = tv1->vval.v_string == tv2->vval.v_string;
break;
}
// FALLTHROUGH
case EXPR_EQUAL: val = (i == 0); break;
case EXPR_ISNOT:
case EXPR_ISNOT: if (in_vim9script())
{
// Really check it is not the same string, not
// just a different value.
val = tv1->vval.v_string != tv2->vval.v_string;
break;
}
// FALLTHROUGH
case EXPR_NEQUAL: val = (i != 0); break;
case EXPR_GREATER: val = (i > 0); break;
case EXPR_GEQUAL: val = (i >= 0); break;