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From: Stefan Monnier <monnier@iro.umontreal.ca>
Newsgroups: gmane.emacs.help
Subject: Re: file/line info for macro expansion
Date: Wed, 05 Jan 2011 01:11:45 -0500
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> However, both `find-function' and `find-variable' seem to know file
> and line number where a function/variable has been defined.

Emacs knows the file name (in most cases, at least), thanks to
load-history.  But it doesn't know the line number.  Instead,
find-function will look for the definition with a regular expression.


        Stefan