How to distinguish a delegate from a function?

[Moritz Warning]

On Sun, 13 Jul 2008 09:42:59 -0400, Matthias Walter wrote:

> 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

Great! I'm looking forward to make use of the solution.