Access template parameters?

[Gavin Maye via Digitalmars-d-learn]

On Tuesday, 16 February 2016 at 19:00:19 UTC, Ali Çehreli wrote:
>
> std.traits.TemplateArgsOf:
>
>   http://dlang.org/phobos/std_traits.html#TemplateArgsOf
>
> import std.traits;
>
> class Foo(type1,type2)
> {}
>
> class Bar(FooType)
> {
>     // pragma(msg, TemplateArgsOf!FooType);
>
>     alias ReturnType = TemplateArgsOf!FooType[0];
>
>     ReturnType DoSomething() {
>         return ReturnType.init;
>     }
> }
>
> void main() {
>     auto b = new Bar!(Foo!(string, double));
> }
>
> However, there are other ways of achieving the same thing at 
> least when returning from a function, e.g.:
>
>     auto DoSomething() {}
>
> (Check out typeof(return) which may be useful in that case.)
>
> Ali

Thanks Ali!