Ingo Karkat wrote:
> there's another discrepancy between the regular expression engines:
>
> for n in [0, 1] | echo string(matchstr(' x', '\%#=' . n . '^\s\{-}\zs\(x\|
> x$\)')) | endfor
> for n in [0, 1] | echo string(matchstr(' x', '\%#=' . n . '^\s\{-}\ze\(x\|
> x$\)')) | endfor
> for n in [0, 1] | echo string(substitute(' x', '\%#=' . n . '^\(\s\{-}\)\(x\|
> x$\)', '\1|\2', '')) | endfor
>
> It apparently depends on the non-greedy \s\{-} match together with the
> branches where only one is anchored. It does _not_ matter whether the
> split is introduced with \zs, \ze, or capturing groups.
>
> To reproduce, use above scriptlet or the identical attached script:
>
> vim -N -u NONE -S bad-re3.vim
> 'x'
> ' x'
> ' '
> ''
> ' |x'
> '| x'
>
> This is with a huge build of Vim 7.4.110, running in an Ubuntu 13.04 x64
> VM.
I'll add it in the todo list.
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