public bool Equals(A a, A b)
{
if (isnull(a))
{
return(isnull(b));
}
if (isnull(b))
{
return(false);
}
if (ReferenceEquals(a, b))
{
return(true);
}
return(EqClass <A> .Equals(a, b));
}
public static Task <int> GetHashCodeAsync <A>(A x, A y) => EqClass <A> .GetHashCodeAsync(x);
public static int GetHashCode <A>(A x, A y) => EqClass <A> .GetHashCode(x);
public static Task <bool> EqualsAsync <A>(A x, A y) => EqClass <A> .EqualsAsync(x, y);
public static bool Equals <A>(A x, A y) => EqClass <A> .Equals(x, y);