Re: readonly member (but assignable at constructor time)

[lempiji via Digitalmars-d-learn]

On Friday, 27 April 2018 at 02:59:16 UTC, Dr.No wrote:

In C# you can have a readonly member assignable either at declaration or constructor time, like this:

class C
{
  readonly myClass mc;

  this()
  {
    mc = new myClass();
  }


  void doSomething()
  {

mc = new myClass(); // wrong! result in compiler error, mc is readonly

  }
}

Does D have something like this natively or there's a way to do so with traits/CTFE at runtime?

You can use std.experimenta.typecons.Final.
https://dlang.org/phobos/std_experimental_typecons.html#.Final