alias void function(ref int) funcType; void foo(ref int a) { a--; }struct functor(A...) { A[0] func; } void main() { functor!funcType f; f.func = &foo; }
I think the best way is using @property. alias void function(ref int) funcType; void foo(ref int a) { a--; } struct functor(A...) { @property void func(A fp) { m_func = fp; } A m_func; } void main() { functor!funcType f; f.func = &foo; }