Am 13.05.2011 19:24, schrieb Radoslaw Nadstawny:
Hi there,
I've encountered some weird behavior in syntax highlighting that happens
when I use the 'extend' attribute. It's hard to describe precisely
with words, so I'm attaching an example to illustrate it.
I've tried to look into the code to find the source of this behavior,
but eventually decided that trying to understand what it does would
take me too much time so I gave up.
" test.vim
sy clear
sy region braces matchgroup=Preproc start=/{/ end=/}/ contains=TOP keepend
sy region parens matchgroup=Operator start=/(/ end=/)/ contains=TOP extend
sy region brackets matchgroup=Todo start=/\[/ end=/]/ transparent extend
sy match angles /<.\{-}>/ contains=TOP
hi link braces String
hi link parens Statement
hi link angles Special
test.txt
This highlights correctly:
(a[a(a)a]a)
{a(a[a]a)a}
<a[a]a>
But try this:
{a(a[a(a)a]a)a}
^^
You have a nested match for "parens", but no "keepend" to be "extend"-ed.
What works for me is to either remove "extend", or add "keepend" in the
parens rule:
:sy region parens matchgroup=Operator start=/(/ end=/)/ contains=TOP
" or
:sy region parens matchgroup=Operator start=/(/ end=/)/ contains=TOP
extend keepend
<a[a<a>a]a>
^^
The "angles" rule (with pattern "<.\{-}>") matches "<a[a<a>", I don't
think the contained "[a<a>a]" should make it match "<a[a<a>a]a>".
{a<a[a]a>a}
^^
What happened?
You use "extend" where it's not needed, apparently Vim doesn't like that.
--
Andy
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