Two types A and B are a model of the concept ImplicitInteroperable, if there is a superior type, such that binary arithmetic operations involving A and B result in this type. This type is Coercion_traits<A,B>::Type.
The type Coercion_traits<A,B>::Type is required to be implicit constructible from A and B.
In this case Coercion_traits<A,B>::Are_implicit_interoperable is Tag_true.