Can I set the base class like this?

[frame]

On Tuesday, 26 January 2021 at 04:39:07 UTC, Jack wrote:
> note the body is the same, what changes is the base class. I'd 
> like to avoid repeating myself when the body is the same and 
> only the base class changes.

You would have to call it with correct instantiation like

alias Foo = C!(A!bool);

Of course T!MyType would not work but I don't think you want that 
anyway.

It very depends on the use-case but just use a mixin where you 
can pass any type you want from template constructor if you don't 
want to repeat yourself:


class MyType {
}

class A {
}

class B {
}

template base(T) {

     static if (is(T : A)) {
         bool doSomething() {
             return true;
         }
     }
     else static if (is(T : B)) {
         bool doSomething() {
             return false;
         }
     }
     else {
         void doSOmethingElse() {
         }
     }
}

class C(T1, T2) {
     mixin base!T2;

     T1 whatever() {
         return new T1;
     }
}

alias Foo = C!(MyType, A);
alias Baa = C!(MyType, B);