From: David Abrahams (david.abrahams_at_[hidden])
Date: 2002-06-21 06:27:17
From: "Joel de Guzman" <djowel_at_[hidden]>
> identity is a nice name. However, the name itself does not imply
> that it is a metafunction. I know it would be longish but I feel
> that type_identity would be better (it's just 1 char longer than
> type_wrapper).
Or we could make it an identity for all seasons?
template <class T = mpl::not_specified>
struct identity : std::unary_function<T,T>
{
typedef T type;
T operator()(T x) const
{
return x;
}
};
template<>
struct identity<mpl::not_specified>
{
template <class T>
struct apply
{
typedef T type;
};
}
I'm sort of kidding... sort of.
-Dave