Re: [Bug 191086] New: grep and bsdgrep do not recognize [[:<:]] and

[e-mail] wrote:
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=191086
> 
>             Bug ID: 191086
>            Summary: grep and bsdgrep do not recognize [[:<:]] and [[:>:]]
>            Product: Base System
>            Version: 9.2-RELEASE
>           Hardware: Any
>                 OS: Any
>             Status: Needs Triage
>           Severity: Affects Many People
>           Priority: ---
>          Component: bin
>           Assignee: [e-mail]
>           Reporter: [e-mail]
> 
> grep and bsdgrep do not recognize the '[[:<:]]' or '[[:>:]]' bracket
> expressions described in re_format(7), though sed does:
> 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> $ printf 'foobar\nfoo bar\nbaz' | grep 'foo[[:>:]]'
> grep: Invalid character class name
> $ printf 'foobar\nfoo bar\nbaz' | grep '[[:<:]]bar'
> grep: Invalid character class name
> $ printf 'foobar\nfoo bar\nbaz' | bsdgrep 'foo[[:>:]]'
> bsdgrep: Invalid character class name
> $ printf 'foobar\nfoo bar\nbaz' | bsdgrep '[[:<:]]bar'
> bsdgrep: Invalid character class name
> $ printf 'foobar\nfoo bar\nbaz' | sed -n '/foo[[:>:]]/p'
> foo bar
> $ printf 'foobar\nfoo bar\nbaz' | sed -n '/[[:<:]]bar/p'
> foo bar
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 

i've never heard it should support [:<:]

i've heard \< is a gnu option not all support

what is your citation showing any standard defines this and that you 
should be allowed to make changes (which maybe will cause other 
problems if you are incorrect) ?

please, thank you
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