allow use of UFCS for delegates
struct X
{
alias D = int function(X);
static D F;
}
Then given x, x.F(); which translates in to X.F(x);
Just because F is local to X shouldn't prevent UFCS from working
on it. If F was global then we should use it and it would work
fine, it's actually safer this way since F is local to X and
cannot be hijacked.