OK. I have done my homework and answered my own question based on
the Duff's Device example in the Language Reference page for
Mixins.
The solution (not variadic though) would be:
mixin template Select!(alias value,
alias if0, alias then0,
alias if1, alias then1,
alias if2, alias then2,
alias thenDefault)
{
switch(value) {
case if0 : { then0(); } break;
case if1 : { then1(); } break;
case if2 : { then2(); } break;
default : thenDefault();
}
}
and it is used this way:
mixin Select!(value,
if0, delegate { then0(); },
if1, delegate { then1(); },
if2, delegate { foo(); bar(); },
delegate { thenDefault(); }
);
no gain at all verbosity-wise I'm afraid... nevermind.
