Replacement for C++ Style Implicit casts?

[bearophile]

Mike Chaten:

> In C++ it is possible to declare a class as follows
> class Foo {
> Foo(int x) { }
> }
> You can then use that constructor to implicitly convert int to Foo. E.g
> Foo x = 0; //equivalent to Foo(0)
> 
> Is there a way in D to do an implicit or explicit conversion from an
> integral type to a class?

Do you mean something like this?


class Foo {
    int x;
    static Foo opCall(int x_) {
        auto f = new Foo;
        f.x = x_;
        return f;
    }
}

void main() {
    Foo f = Foo(5);
    assert(f.x == 5);
}

(With structs it's simpler)

Bye,
bearophile