Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!umich!eecs.umich.edu!spencer
From: spencer@eecs.umich.edu (Spencer W. Thomas)
Newsgroups: comp.sys.mac.programmer
Subject: Re: ?Bug? in LsC Preprocessor.
Message-ID: <SPENCER.89Mar28104729@spline.eecs.umich.edu>
Date: 28 Mar 89 15:47:29 GMT
References: : <11796@umn-cs.CS.UMN.EDU>
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In-reply-to: goers@julius.cs.umn.edu's message of 27 Mar 89 23:25:13 GMT

This is the sort of thing that is not guaranteed to work across C
preprocessors.  It works in pcc based compilers.  ANSI C has a
standard for "token concatenation" (which is what you are trying to
do) using ##.  Thus, your example would be

#define check_size(name) \
	if (e_##name >= l_##name) { \
	    register nsize = l_##name-s_##name+400; \
	    name##buf = (char *) realloc(name##buf, nsize); \
	    e_##name = name##buf + (e_##name-s_##name) + 1; \
	    l_##name = name##buf + nsize - 5; \
	    s_##name = name##buf + 1; \
	}

You might try this and see if LSC hacks it.  (I think LSC 3.0 is
supposed to be ANSI-compliant, so it should.)  Otherwise, you are out
of luck.

=Spencer (spencer@eecs.umich.edu)