Date: Sun, 27 Oct 1996 14:56:49 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
To: B Hodge <bhodge AT gpu2 DOT srv DOT ualberta DOT ca>
Cc: djgpp AT delorie DOT com
Subject: Re: Borland library macro equivalent?
In-Reply-To: <54lrf9$ntu@pulp.ucs.ualberta.ca>
Message-Id: <Pine.SUN.3.91.961027145451.14799U-100000@is>
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII


On 23 Oct 1996, B Hodge wrote:

> Eli Zaretskii (eliz AT is DOT elta DOT co DOT il) wrote:
> : 	#define max(a,b) ({ typeof(a) _tmp_a = (a); \
> : 			    typeof(b) _tmp_b = (b); \
> : 			    (_tmp_a > _tmp_b) ? _tmp_a : _tmp_b; })
> 
> So then the following code would be legal?
> 
> x={ int s, c; s=sin(a); c=cos(a); s*s*y+s*c*y+c*c*y; };

I'm not sure it will work without parentheses around it:

x = ({ int s, c; s=sin(a); c=cos(a); s*s*y+s*c*y+c*c*y; });

But this is documented in the GCC docs; just read there.

> Is this legal under other languages tooor is it just a DJGPP specific
> thing?

It's GCC specific, so it will work on any platform if you use GCC.