change mixins

[Michel Fortin]

On 2010-02-14 16:31:29 -0500, Walter Bright <newshound1 at digitalmars.com> said:

> Right now, mixins are defined and used as:
> 
>     template foo(T) { declarations... }
> 
>     mixin foo!(int) handle;
> 
> The proposal is to switch it around:
> 
>     mixin template foo(T) { declarations... }
> 
>     foo!(int) handle;
> 
> to follow the notion that mixin templates are very different from 
> regular templates, and that should be reflected in their definition 
> rather than use.
> 
> What do you think?

There's one thing I'd wish a lot to be able to do in a template mixin: 
being able to get the name of the 'handle' part from inside the 
template. I'm wondering, if you implement this change, could you add 
syntax to get that? I was thinking of "mixin.stringof", and it'd be 
usable like this:

	mixin template Value(int) {
		int value;
		void write() { writeln("Value '", mixin.stringof, "' is ", value); }
	}

	class A {
		Value!int test;
	}

	A a = new A;
	a.hello.write(); // writes "Value 'test' is 0"


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