Typeof operator in C (Re: An Interesting View of "Strong" Vs. "Weak" Typing)

[Peter da Silva]

> 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...
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