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Re: [Help-bash] Does bash support ENHANCED FEATURES in re_format(7)?


From: Greg Wooledge
Subject: Re: [Help-bash] Does bash support ENHANCED FEATURES in re_format(7)?
Date: Mon, 13 May 2013 08:35:51 -0400
User-agent: Mutt/1.4.2.3i

On Sun, May 12, 2013 at 10:19:20PM -0500, Peng Yu wrote:
> re_format(7) says (under ENHANCED FEATURES)
> 117            \d  Matches a digit character.  This is equivalent to
> `[[:digit:]]'.

GNU/Linux extensions to the POSIX standards for regular expression
syntax are not guaranteed to work in all applications.

For what it's worth, the re_format(7) man page in Debian 6.0 does not
even have an "ENHANCED FEATURES" section.  Neither does the re_format(7)
in Debian wheezy (upcoming 7.0).

> The following code shows that '\d' does not work. Does bash support
> these ENHANCED FEATURES in re_format(7)?

Obviously not.



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