Re: overiding mutable methods in immutable classes

[anonymous via Digitalmars-d-learn]

On Saturday, 22 November 2014 at 15:00:00 UTC, Eric wrote:

Yes, but if I don't declare the class T as immutable, I don't
think this constraint will work.

You're mistaken. It works just fine.

class X /* not immutable */
{
     private int x;
     this(int x) pure { this.x = x; }
}
template foo(T : immutable Object)
{
     void foo(T thing) {}
}
void main()
{
      foo(new immutable X(5));
}