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From: Joe Perches <joe@perches.com>
To: Junio C Hamano <gitster@pobox.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	git <git@vger.kernel.org>,
	Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
	Petr Mladek <pmladek@suse.com>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] printk: Remove no longer used second struct cont
Date: Thu, 15 Dec 2016 22:04:25 -0800	[thread overview]
Message-ID: <1481868265.29291.84.camel@perches.com> (raw)
In-Reply-To: <xmqqtwa4tqnc.fsf@gitster.mtv.corp.google.com>

On Thu, 2016-12-15 at 21:00 -0800, Junio C Hamano wrote:
> Joe Perches <joe@perches.com> writes:
> 
> > grep 2.5.4 was the last version that supported the -P option to
> > grep through for multiple lines.
> 
> Does anybody know why it was dropped?

perl compatible regexes in grep have always been "experimental"
and never officially supported.

>From the grep manual https://www.gnu.org/software/grep/manual/grep.html

    --perl-regexp

        Interpret the pattern as a Perl-compatible regular expression
    (PCRE). This is highly experimental, particularly when combined with
    the -z (--null-data) option, and ‘grep -P’ may warn of unimplemented
    features. See Other Options.


It wasn't dropped so much as "enhanced" away.

Oh well.

WARNING: multiple messages have this Message-ID (diff)
From: Joe Perches <joe@perches.com>
To: Junio C Hamano <gitster@pobox.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	git <git@vger.kernel.org>,
	Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
	Petr Mladek <pmladek@suse.com>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] printk: Remove no longer used second struct cont
Date: Thu, 15 Dec 2016 22:04:25 -0800	[thread overview]
Message-ID: <1481868265.29291.84.camel@perches.com> (raw)
In-Reply-To: <xmqqtwa4tqnc.fsf@gitster.mtv.corp.google.com>

On Thu, 2016-12-15 at 21:00 -0800, Junio C Hamano wrote:
> Joe Perches <joe@perches.com> writes:
> 
> > grep 2.5.4 was the last version that supported the -P option to
> > grep through for multiple lines.
> 
> Does anybody know why it was dropped?

perl compatible regexes in grep have always been "experimental"
and never officially supported.

From the grep manual https://www.gnu.org/software/grep/manual/grep.html

    --perl-regexp

        Interpret the pattern as a Perl-compatible regular expression
    (PCRE). This is highly experimental, particularly when combined with
    the -z (--null-data) option, and ‘grep -P’ may warn of unimplemented
    features. See Other Options.


It wasn't dropped so much as "enhanced" away.

Oh well.


  reply	other threads:[~2016-12-16  6:04 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-12-15 12:53 [PATCH] printk: Remove no longer used second struct cont Geert Uytterhoeven
2016-12-15 16:23 ` Petr Mladek
2016-12-16  1:37   ` Sergey Senozhatsky
2016-12-16  1:39     ` Joe Perches
2016-12-16  1:50       ` Sergey Senozhatsky
2016-12-16  1:50     ` Linus Torvalds
2016-12-16  1:57       ` Joe Perches
2016-12-16  2:10         ` Linus Torvalds
2016-12-16  2:30           ` Joe Perches
2016-12-16  5:00             ` Junio C Hamano
2016-12-16  6:04               ` Joe Perches [this message]
2016-12-16  6:04                 ` Joe Perches
2016-12-16  2:00       ` Sergey Senozhatsky
2016-12-18 19:29       ` Scott Matheina

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