Re: [boost] Alternative implementation for BOOST_PP_VARIADIC_SIZE

Subject: Re: [boost] Alternative implementation for BOOST_PP_VARIADIC_SIZE
From: Gennadiy Rozental (rogeeff_at_[hidden])
Date: 2011-11-13 21:48:03

Edward Diener <eldiener <at> tropicsoft.com> writes:

> the page. My comment is:
> 
> "#define AMACRO(x) ()
> IS_EMPTY(AMACRO) is true, where of course it should be false.

Are you sure? My gcc (cygwin) says it false.

On the other hand if you define it like this:

#define AMACRO(x,y) anything here

if fails to build.

In any case, as I said previous, this is corner case we should just document,
but size should return zero when we actually did not pass any arguments to the
macro.

Gennadiy