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From: chris@mimsy.UUCP (Chris Torek)
Newsgroups: comp.lang.c
Subject: Re: Question on structures
Message-ID: <9308@mimsy.UUCP>
Date: Wed, 11-Nov-87 20:04:21 EST
Article-I.D.: mimsy.9308
Posted: Wed Nov 11 20:04:21 1987
Date-Received: Sat, 14-Nov-87 06:00:04 EST
References: <1025@phoenix.Princeton.EDU> <3022@bunker.UUCP> <150@fxgrp.UUCP>
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 42
Keywords: Sturctures records

[Aside to ljz: you are misusing the `Followup-To' header.  It is
supposed to redirect followup messages to another newsgroup, not
indicate the article to which this message is a followup.  *That*
funciton belongs to the `References' line, which is maintained
automatically by current netnews software (including yours).]

In article <150@fxgrp.UUCP> ljz@fxgrp.UUCP (Lloyd Zusman) writes:
>#define WITH(Name, Type, Struct)  { Type *Name = &(Struct);
>#define ENDWITH                   }
	...
>	WITH (X, struct baz, p.z.i)
>		X->a = 1;
>		X->b = 2;
>		X->c = 3;
>	ENDWITH

The problem with such macros is that they rapidly get out of hand.
Perhaps no one will sue me for posting the following extract:

readsym()
{
	REG char	*p;

	p = isymbol;
	REP IF p < &isymbol[sizeof(isymbol)-1]
	    THEN *p++ = lastc;
	    FI
	    readchar();
	PER symchar(1) DONE
	*p++ = 0;
}

symchar(dig)
{
	IF lastc=='\\' THEN readchar(); return(TRUE); FI
	return( isalpha(lastc) ORF lastc=='_' ORF dig ANDF isdigit(lastc) );
}

(Yes, the above *is* C code.)
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7690)
Domain:	chris@mimsy.umd.edu	Path:	uunet!mimsy!chris