Re: Copying matched parts of lines

On 2013-03-26 16:56, Christian Brabandt wrote:
> On Tue, March 26, 2013 16:43, BPJ wrote:
> > Is it somehow possible with :g// to copy only the
> > matched parts of lines as with the -o option of grep?
> >
> > /bpj
>
> With a recent enough Vim, you can make use of :s command and
> execute VimL on the replacement part while not modifying the match
> (by using the 'n' flag):
>
>
> fu! CopyMatches(match)
> if !exists("g:a")
> let g:a = []
> endif
> call add(g:a, a:match)
> endfu
>
> :%s/foobar/\=CopyMatches(submatch(0))/gn
> :new +put\ =g:a

I believe Christian's comment about the "recent enough Vim" involves
the /n flag actually executing the replacement if it's a
sub-replace-special (earlier versions didn't, IIRC). If that's the
case, the function can be modified to simply return the match:

fu! CopyMatches(match)
if !exists("g:a")
let g:a=[]
endif
call add(g:a, a:match)
return a:match
endfu
:%s/pattern/\=CopyMatches(submatch(0))/g

It may have the unfortunate side-effect of setting 'modified' when all
the modifications were NOOPs, but you can either simply undo the
non-modification, or you can force the setting of 'nomodified'.

-tim



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