From owner-freebsd-hackers@FreeBSD.ORG  Mon May  9 06:13:35 2011
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To: Zhihao Yuan <lichray@gmail.com>
In-reply-to: Your message of "Sun, 08 May 2011 21:35:04 CDT."
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Comments: In-reply-to Zhihao Yuan <lichray@gmail.com>
	message dated "Sun, 08 May 2011 21:35:04 -0500."
Date: Sun, 08 May 2011 23:13:34 -0700
From: Bakul Shah <bakul@bitblocks.com>
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Cc: Gabor Kovesdan <gabor@kovesdan.org>,
	"Pedro F. Giffuni" <giffunip@yahoo.com>, hackers@freebsd.org,
	Brooks Davis <brooks@freebsd.org>
Subject: Re: [RFC] Replacing our regex implementation 
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On Sun, 08 May 2011 21:35:04 CDT Zhihao Yuan <lichray@gmail.com>  wrote:
> 1. This lib accepts many popular grammars (PCRE, POSIX, vim, etc.),
> but it does not allow you to change the mode.
> http://code.google.com/p/re2/source/browse/re2/re2.h

The mode is decided when an RE2 object is instantiated so this
is ok. You can certainly instantiate multiple objects with
different options if so desired.

> 2. It focuses on speed and features, not stability and standardization.

Look at the open issues. Seems stable enough to me. re2 has a
posix only mode. It also does unicode.

> 3. It uses C++. We seldom accepts C++ code in base system, and does
> not accept it in libc.

This is the show stopper.