How to distinguish a delegate from a function?

[Matthias Walter]

Moritz Warning Wrote:

> On Sun, 13 Jul 2008 03:38:36 +0200, Oliver Dathe wrote:
> 
> > This works here:
> > 
> > template isCallableStatically(T)
> > {
> > 	static if (is(T==function) || is(typeof(*T)==function))
> > 		const bool isCallableStatically = true;
> > 	else static if (is(T==delegate))
> > 		const bool isCallableStatically = false;
> > 	else static assert (false);
> > }
> > 
> > template isCallableStatically(alias T) {
> > 	const isCallableStatically = isCallableStatically!(typeof(&T));
> > }
> > 
> > void fn() {}
> > 
> > void main()
> > {
> > 	void dg() {}
> > 
> > 	static assert (isCallableStatically!(fn)); static assert
> > 	(!isCallableStatically!(dg)); static assert
> > 	(isCallableStatically!(typeof(&fn))); static assert
> > 	(!isCallableStatically!(typeof(&dg)));
> > }
> 
> Doesn't work for A.bar and A.foo (where foo is static and therefore don't 
> need an object)

I had this problem some months ago and found a solution: You can extract the information, whether a function given as a template alias parameter is static or not, from the mangle of it. Currently, I'm developing a Compile-Time-Function-Execution- and Template-Metaprogramming- Utils library. The first goal after some string-parsing routines is a compile-time demangler which will then also be able to extract this information. But I guess, I'll stillt need some weeks for this. When I'm done, I'll create a dsource projects and announce it on the news.

best regards
Matthias Walter