Path: utzoo!attcan!uunet!seismo!sundc!pitstop!sun!quintus!ok
From: ok@quintus.uucp (Richard A. O'Keefe)
Newsgroups: comp.lang.c++
Subject: Re: Including header files minimally.
Message-ID: <738@quintus.UUCP>
Date: 24 Nov 88 02:01:48 GMT
References: <3561@pt.cs.cmu.edu> <7860@nsc.nsc.com> <3614@pt.cs.cmu.edu> <10873@ulysses.homer.nj.att.com> <1073@actnyc.UUCP>
Sender: news@quintus.UUCP
Reply-To: ok@quintus.UUCP (Richard A. O'Keefe)
Organization: Quintus Computer Systems, Inc.
Lines: 9

Instead of tinkering with the definition of an existing construct,
why not do the sanitary thing and add a new one?
	#use {filename}
resolve a "filename" or <filename> as #include would, and if that
resolved file name has already been #included or #used, do nothing
otherwise #include it.  Easy to do, can't break old code, doesn't
require changes to the file being used.  In fact, if you record
the usage of the filename when the #include or #use is _started_,
you can even have files which #use each other (this can be useful).