typed vtable

[Michel Fortin]

On 2008-11-18 10:17:20 -0500, "Jarrett Billingsley" 
<jarrett.billingsley at gmail.com> said:

> A pointer template-struct to a virtual member function without knowing
> the target object in advance?
> 
> Something like this: http://codepad.org/SXIP2jBL ?

Yeah, I was experimenting with this method while you wrote this. The 
sad thing about it is that you need to specify the name of the function 
as a string instead of an alias... meaning that a typo will create an 
error inside the template's code. Well I've found a trick to avoid that:

	template FunctionName(alias f) {
		const string FunctionName = (&f).stringof[0..$-2];
	}

Using this template, you can get the name of a function from an alias, 
but that's mostly a hack.

And also, you can't create such a "pointer" to a private or protected 
method and give it to another template that lives outside the class: 
the mixin just won't work there because of the protection attribute.

But your template is pretty neat.

-- 
Michel Fortin
michel.fortin at michelf.com
http://michelf.com/