[debbugs-tracker] bug#30686: closed (How to color matched region but also show the nearby context noncolored in characters or words?)

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Your message dated Sat, 3 Mar 2018 18:26:28 -0700
with message-id <address@hidden>
and subject line Re: bug#30686: How to color matched region but also show the 
nearby context noncolored in characters or words?
has caused the debbugs.gnu.org bug report #30686,
regarding How to color matched region but also show the nearby context 
noncolored in characters or words?
to be marked as done.

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30686: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=30686
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> --- Begin Message ---
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> Subject: 
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> How to color matched region but also show the nearby context noncolored in characters or words?
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> Date: 
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> Fri, 2 Mar 2018 22:04:01 -0600
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> Hi,
>
> I am looking for a feature similar to -A -B -C but not based on lines,
> but based on characters or even words. Is it possible with the current
> version of grep?
>
> In the following example, I'd like to show the matched region as well
> as 3 characters before and after it. But the 3 characters before and
> after the match is also showed.
>
> grep --color -o -P '.{0,3}a.{0,3}' <<< '+++++++++++++++++a++++++++++++++++++++'
>
> -- 
> Regards,
> Peng
>
>
>
> --- End Message ---
> --- Begin Message ---
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> Subject: 
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> Re: bug#30686: How to color matched region but also show the nearby context noncolored in characters or words?
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>
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> Date: 
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> Sat, 3 Mar 2018 18:26:28 -0700
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> User-agent: 
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> Mutt/1.9.3 (2018-01-21)
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>
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>
> tags 30686 + notabug
> thanks
>
> Peng Yu wrote:
> > I am looking for a feature similar to -A -B -C but not based on lines,
> > but based on characters or even words. Is it possible with the current
> > version of grep?
> >
> > In the following example, I'd like to show the matched region as well
> > as 3 characters before and after it. But the 3 characters before and
> > after the match is also showed.
> > 
> > grep --color -o -P '.{0,3}a.{0,3}' <<< 
> > '+++++++++++++++++a++++++++++++++++++++'
>
> Those three characters before and after as you say are also part of
> the pattern and are also part of the match.  If you want to then only
> color a subset in a second grep you can always do that.
>
>   grep -o -P '.{0,3}a.{0,3}' <<< '+++++++++++++++++a++++++++++++++++++++' | 
> grep --color 'a'
>   +++a+++
>      ^ only the 'a' is highlighted
>
> Bob
>
>
> --- End Message ---