import std;

​

void main()

{

}

​

class ExampleC

{

  int x;

  this (int x) @safe

  {

    this.x = x;

  }

​

  override bool opEquals(Object o) const @trusted

  {

    if (ExampleC rhs = cast(ExampleC)o) {

      return this.x == rhs.x;

    }

    return false;

  }

}

​

@safe unittest

{

    auto c = new ExampleC(1);

    assert(c != new ExampleC(23));

}