Re: Readonly field for class type

[Simen Kjærås via Digitalmars-d-learn]

On Thursday, 15 March 2018 at 10:16:49 UTC, Andrey wrote:

Hello, is there way to declare read only field for class type with ability to call inner non constant methods? i.e.:

class A {
    int value = 12;
    void updateValue() {
        value = 13;
    }
}

class B {
    const A a;

    this() {
        a = new A();

a.updateValue(); // error: mutable method is not callable using const object

    }
}

You can do this:

class B {
    private A _a;
    @property const(A) a() { return _a; }

    this() {
        _a = new A();
        _a.updateValue();
    }
}

--
  Simen