Am 31.10.2011 22:59, schrieb Christian Brabandt:
On Mo, 31 Okt 2011, Ernie Rael wrote:
It's similar, but a list of chars that need escaping is more flexible.
I could specify that '(' needs to be escaped to mean grouping and that
'?' does not need to be escaped to mean optional. Using the list could
be dependent on the "magic-ness of a pattern".
Hm, interesting concept. Attached is a simple script to try out.
Use
:let g:re_dont_escape = '()|?'
to specify which chars have a special meaning and don't need to be
escaped (only for using the literal version). So in this example, '()
wouldn't need to be escaped for grouping, '|' means OR and '?' means
optional match.
When searching, press<f7> to translate the pattern into a vim pattern.
It basically only adds/removes the backslashes (so you need to know all
vim specific atoms, like '\@<=' and can't use e.g. Perl look-arounds).
Disclaimer, only very basically tested.
regards,
Christian
Neat! attached is a mod with backslash/'ff'-bugs fixed and simpler
notation, shorter gen'd patterns and preparation for multi-char items,
otherwise no feats added.
--
Andy
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" Toggle backslash before custom pattern items in the search cmdline
" File: search_escape.vim
" Created: 2011 Oct 31
" Last Change: 2011 Nov 01
"
" Orig by Christian Brabandt @ vim_dev
" Mod by Andy Wokula
" TODO
" - useful default for g:search_escape_items
" - don't replace chars within collections [...]
" + like orig script, prepare for special items that are longer than one
" char
if !exists("g:search_escape_items")
if &magic
let g:search_escape_items = '( ) | ? @='
" no '\' allowed
else
" literal chars with 'nomagic':
let g:search_escape_items = '. * [ ~'
endif
endif
cnoremap <F8> <C-\>e ToggleEscape(g:search_escape_items)<CR>
func! ToggleEscape(special_items)
" {special_items} string of space-separated pattern items
let pat = getcmdline()
if getcmdtype() !~ '[/?]' || a:special_items == ""
return pat
elseif a:special_items =~ '\\'
echoerr 'No ''\'' allowed in g:search_escape_items'
return pat
endif
" pattern to match instances of special items
let si_pat = '\V\%('. join(split(a:special_items),'\|'). '\)'
" (1) pattern for unescaped instances:
let subst1 = '\m'. s:notesc. si_pat
" (2) pattern for escaped instances:
let subst2 = '\m'. s:notesc. '\\'. si_pat
" decorate escaped instances, for later removal of the backslash:
let pat = substitute(pat, subst2, '#FIX#&#ME#', 'g')
" add backslash before unescaped instances:
let pat = substitute(pat, subst1, '\\&', 'g')
" remove decoration and backslash from decorated instances:
let pat = substitute(pat, '\m#FIX#\\\(.\{1,3}\)#ME#', '\1', 'g')
return pat
endfunc
let s:notesc = '\%(\\\@<!\%(\\\\\)*\)\@<='
