Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!usc!zaphod.mps.ohio-state.edu!wuarchive!swbatl!texbell!ficc!peter
From: peter@ficc.uu.net (Peter da Silva)
Newsgroups: comp.lang.c
Subject: Re: Typeof operator in C (Re: An Interesting View of "Strong" Vs. "Weak" Typing)
Message-ID: <O121W13ggpc2@ficc.uu.net>
Date: 14 Jan 90 16:15:27 GMT
References: <16678@megaron.cs.arizona.edu> <7106@tank.uchicago.edu> <-K016ODxds13@ficc.uu.net> <BRISTER.90Jan12182057@aries.td2cad.intel.com>
Reply-To: peter@ficc.uu.net (Peter da Silva)
Distribution: usa
Organization: Xenix Support, FICC
Lines: 18

> Check out the GNU CC compiler. It has a ``typeof'' keyword that looks like
> the ``sizeof'' keyword.

Yes, seveal people have pointed me at GCC on this one.

> #define SWAP(a,b) {typeof (a) tmp; tmp=a; a=b; b=tmp;}
                            ^ ^

Are these parens needed? sizeof doesn't need tham.

Does GCC have my other favorite extensions?

	Anonymous aggregate constants. (execv(prog, (char *){"prog", ...})

	The BCPL valof operator. (a = valof { ... return b; }), also
known as the anonymous function.

Both of these were in BCPL, and the former is in PL/M as well...
-- 
 _--_|\  Peter da Silva. +1 713 274 5180. <peter@ficc.uu.net>.
/      \
\_.--._/ Xenix Support -- it's not just a job, it's an adventure!
      v  "Have you hugged your wolf today?" `-_-'