[Qt-interest] Advices on safer SIGNAL macro

[Mandeep Sandhu]

On Thu, Oct 20, 2011 at 1:17 AM, Johannes Schaub
<schaub.johannes at googlemail.com> wrote:
> I've written myself a custom SIGNAL macro that at compile time checks that
> all parameter types I gave in the signature passed to SIGNAL are known at
> the point of use of SIGNAL:
>
> namespace static_signal_detail {
>   template<typename>
>   struct take { };
> }
>
> #define STATIC_SIGNAL(SIG) (static_signal_detail::take<void(void SIG)>(), \
>                            SIGNAL(SIG))
>

Interesting. How does this work?

-mandeep