| // (C) Copyright John Maddock & Thorsten Ottosen 2005. |
| // Use, modification and distribution are subject to the Boost Software License, |
| // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt). |
| // |
| // See http://www.boost.org/libs/type_traits for most recent version including documentation. |
| |
| |
| #ifndef BOOST_TT_DECAY_HPP_INCLUDED |
| #define BOOST_TT_DECAY_HPP_INCLUDED |
| |
| #include <boost/type_traits/config.hpp> |
| #include <boost/type_traits/is_array.hpp> |
| #include <boost/type_traits/is_function.hpp> |
| #include <boost/type_traits/remove_bounds.hpp> |
| #include <boost/type_traits/add_pointer.hpp> |
| #include <boost/type_traits/remove_reference.hpp> |
| #include <boost/mpl/eval_if.hpp> |
| #include <boost/mpl/identity.hpp> |
| |
| namespace boost |
| { |
| |
| template< class T > |
| struct decay |
| { |
| private: |
| typedef BOOST_DEDUCED_TYPENAME remove_reference<T>::type Ty; |
| public: |
| typedef BOOST_DEDUCED_TYPENAME mpl::eval_if< |
| is_array<Ty>, |
| mpl::identity<BOOST_DEDUCED_TYPENAME remove_bounds<Ty>::type*>, |
| BOOST_DEDUCED_TYPENAME mpl::eval_if< |
| is_function<Ty>, |
| add_pointer<Ty>, |
| mpl::identity<Ty> |
| > |
| >::type type; |
| }; |
| |
| } // namespace boost |
| |
| |
| #endif // BOOST_TT_DECAY_HPP_INCLUDED |