The most awesome "forward to member" solution?

[Andrei Alexandrescu via Digitalmars-d]

On 5/3/15 4:20 PM, Meta wrote:
> On Sunday, 3 May 2015 at 20:25:45 UTC, Andrei Alexandrescu wrote:
>> OK, here's what I have now - two templates that are self contained and
>> work well:
>>
>> The first uses opDispatch to dispatch to a member. The second is a
>> simple string function that generates the appropriate code. As
>> discussed the latter composes but the former doesn't.
>
> I can't picture what you're talking about. Could you post an example?

struct A
{
    void fun(int);
}

struct B
{
     A a;
     mixin forwardToMember!(a, "fun");
}

struct C
{
     B b;
     mixin forwardToMember!(b, "fun");
}


Andrei