beard.meta.child_of source code

1 module beard.meta.child_of;
2 
3 /// Tests if C is a subclass of P.
4 template ChildOf(C, P) {
5     static if (is(C Unused : P))
6         enum ChildOf = true;
7     else
8         enum ChildOf = false;
9 }
10 
11 /// Defines a nested Eval!C template that tests if C is a subclass of P.
12 template ChildOf(P) {
13     template Eval(C) {
14         enum Eval = ChildOf!(C, P);
15     }
16 }
17 // vim:ts=4 sw=4