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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Indexed search with grep-like output
Date: Sat, 01 Jan 2011 22:51:05 +0200
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To: Lennart Borgman <lennart.borgman@gmail.com>
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> From: Lennart Borgman <lennart.borgman@gmail.com>
> Date: Sat, 1 Jan 2011 20:24:53 +0100
> 
> This kind of search is quite nice for quickly looking up things in for
> example Emacs code

The GNU Id-utils package already does that for searching identifiers
in program source code.  The package comes with id-utils.el, which
implements the Emacs front-end for it, and produces grep-like output.