Re: [vim/vim] Can't use 'is' in a oneline vim9 lambda (Issue #20967)

h_east (Vim Github Repository) <[email protected]> Fri, 07 Aug 2026 04:14:33 -0700
Newsgroups gmane.editors.vim.devel
Message-ID <vim/vim/issues/20967/[email protected]>
h-east left a comment (vim/vim#20967)

Yeah, that's correct. I'm citing the documentation here for the benefit of anyone who comes along later.

```
expr5 {cmp} expr5

(snip...)
			*expr-is* *expr-isnot* *expr-is#* *expr-isnot#*
			*expr-is?* *expr-isnot?* *E1072*
(snip...)
NOTE: In |Vim9| script 'ignorecase' is not used.

(snip...)
							*E1037*
(snip...)
"is#"/"isnot#" and "is?"/"isnot?" can be used to match and ignore case.
In |Vim9| script this doesn't work, two strings are never identical.
```



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