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From: Eli Zaretskii <eliz@is.elta.co.il>
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Subject: Re: Assignment of misc packages for emacs
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On Wed, 15 May 2002, Andreas Schwab wrote:

> Eli Zaretskii <eliz@is.elta.co.il> writes:
> 
> |> Perhaps we should make the ID-utils interface part of Emacs, and expand 
> |> it to present a menu of possibilities.
> 
> We already have etags, which is pretty similar.

No.  etags only records _definitions_ of functions, macros, typedefs, 
etc.  It does not record where they are _used_, and it by default doesn't 
record local variables.

By contrast, mkid records _all_ tokens, no matter what their usage is.  
So if you want to know where is some function _called_ etags won't help, 
but ID will.

I always think about ID-utils as a language-aware Grep.