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From: Stefan Monnier <monnier@iro.umontreal.ca>
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Subject: Re: Byte-compile constants in a function
Date: Wed, 04 Jul 2012 09:26:06 -0400
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> (defconst  tag-prompt ?>)
> (defun check (char) (eq char tag-prompt))

You can do

   (eval-when-compile
     (defconst tag-prompt ?>))
   
   (defun check (char) (eq char (eval-when-compile tag-prompt)))


-- Stefan