force preference of const-version?

Question

let's say I have

class A {
  double a;
  double Value() const {
    return a;
  }

  double& Value() {
    return a;
  }

}

//later:
A foo;
double b = foo.Value();

now, the non-const version will be called. Is there a nice way to force the use of the const version? I think it's possible with a cast but I don't think it's very elegant.

Answer 1

You may cast it to const.

double b = static_cast<const A&>(foo).Value();

(I don't think I've ever explicitly added const to a variable. I'm not sure if static_cast is more appropriate than const_cast.)