Extend Classes in Template (D)

Question

How do I extend a class that's inside a template in D?

template A {
    abstract class B {}
}
class C : B {}

How so I extend B, from outside A?

Answer 1

Your code doesn't compile, you need to specify template arguments.

a.d:3: parenthesized TemplateParameterList expected following TemplateIdentifier

I'm not sure if you want C to be a template too. The following outputs 0.

import std.stdio;

template A(T) {
  abstract class  B {
    public T f() {
      return T.init;
    } 
  }
}

class C : A!(int).B {}

int main() {
  writeln((new C()).f());
  return 0;
}