On Sat, Feb 11, 2017 at 11:52 AM, Tim Chase <[email protected]> wrote:
> On 2017-02-11 11:26, Arun wrote:
> > On Sat, Feb 11, 2017 at 2:37 AM, Bram Moolenaar wrote:
> >> Perhaps this will work:
> >> :{range}copy {address} !cmd
> >>
> >
> > Just wondering how this would work with :g, hope it wont be
> > executing the filter against each line, rather as a whole. It would
> > be useful to have a set of lines selected using :g applied against
> > a filter. If the output of the filtered command be captured to a
> > register (or to a destination line, like copy), that would be
> > awesome. Maybe, :g, is not the right command to use, but something
> > like that would be useful, IMHO.
>
> The syntax of the :g command allows you to specify ranges for the
> subsequent ex commands. So you can do things like
>
> :g/pattern/-3,+5t$
>
> to find all the lines matching "pattern" and copy it along with 3
> lines of context before and 5 lines of context after to the bottom of
> the file.
>
> So with Bram's proposal,
>
> :g/pattern/copy {address} !cmd
>
> would run "cmd" for each matching line. But if each /pattern/
> finds something within a block you want to process together, you
> would be able to do
>
> :g/pattern/-3,+5copy {address} !cmd
>
> It would still run "cmd" once for every /pattern/, but it wouldn't run
> it 9 times for every pattern (3 before + 1 current + 5 after) in this
> example.
True, I understand the :g behavior; but was wondering how a group of lines
matching a pattern could be fed to the filter in one go, unlike the :g way.
The current proposed way would work fine with simple consecutive lines, but
would be nice to extend with patterns too. Just a wish.
Regards,
-Arun
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