Re: [bug?] \zs in regex not working with ":syn match ..."

Hi,

Dominique Pellé schrieb:
> Given the fillowing text in a buffer:
>
> ABCDEF
> GHIJKL
>
> The following command does not highlight anything
> and I don't see why:
>
> :syn clear | syn match Error 'DEF\_.\zsGHI'
>
> Nothing is highlighted. I would expect GHI to be highlighted.
>
> Is it a bug?
>
> You can reproduce it with:
>
> $ (echo ABCDEF; echo GHIJKL) | \
> vim -u NONE -N \
> -c 'syntax on' \
> -c ":syn clear | syn match Error 'DEF\_.\zsGHI'" -
>
> If I remove \zs (start of match) then text is highlighted as expected:
>
> :syn clear | syn match Error 'DEF\_.GHI'
>
> If I use \ze, then text is also highlighted as expected:
>
> :syn clear | syn match Error 'DEF\_.\zeGHI'
>
> But somehow it does not work when I try to use \zs.
> I'm using Vim-7.3.3 on Linux x86.

there is a note in :help syntax.txt at line 3567 (Vim 7.3.3):

- The start of a match cannot be in a line other than where the pattern
matched. This doesn't work: "a\nb"ms=e. You can make the highlighting
start in another line, this does work: "a\nb"hs=e.

This seems to talk about the ms-flag, but it might be relevant to your
case, too.

Regards,
Jürgen

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