On Sun, 28 Dec 2014 14:07:18 -0800
AuoroP via Digitalmars-d-learn <digitalmars-d-learn@puremagic.com>
wrote:

let me give you a riddle:

  struct ExampleTemplate(T) {
    T value;

    auto opAdd (typeof(this) that) inout {
      import std.traits : Unqual;
      Unqual!(typeof(this)) result;
      result.value = this.value+that.value;
      return result;
    }
  }

  alias ExampleTemplate!int Example;

  void main () {
    immutable immutableEx = Example(1);
    Example ex = Example(1);
    Example ex2 = immutableEx+ex;
  }

i tend to give some explanations to my answers here, but i'm in a strange mood today, so sorry, no explanations this time.