Hello Vim developers, 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.
-- regards, ingo
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bad-re3.vim
Description: application/octetstream
