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From: minow@decvax.UUCP (Martin Minow)
Newsgroups: net.lang.c
Subject: Forming composite tokens using /**/
Message-ID: <476@decvax.UUCP>
Date: Wed, 2-May-84 22:12:21 EDT
Article-I.D.: decvax.476
Posted: Wed May  2 22:12:21 1984
Date-Received: Fri, 4-May-84 02:24:34 EDT
References: <1230@brl-vgr.ARPA>
Organization: DEC UNIX Engineering Group
Lines: 21

Doug Gwyn noted that the C preprocessor allows you to form
composite tokens by using a "null" comment in the macro
definition:

	#define token(a, b) a/**/b
	...
	... token(foo, bar) generates "foobar"

I think this is specific to the particular implementation of the
pre-processor and may not be transportable.  There have been
mumblings in the C standards documentation as to how #defines
and comments will work, but I wouldn't count on the above hack
surviving.

Flames to the net -- I'm not on the committee.

Martin Minow
decvax!minow