//  (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/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/type_traits/remove_cv.hpp>

namespace boost {

namespace detail {

template <class T, bool Array, bool Function> struct decay_imp
{
    typedef typename remove_cv<T>::type type;
};
template <class T> struct decay_imp<T, true, false>
{
    typedef typename remove_bounds<T>::type* type;
};
template <class T> struct decay_imp<T, false, true>
{
    typedef T* type;
};

}

template< class T >
struct decay
{
  private:
    typedef typename remove_reference<T>::type Ty;
  public:
    typedef typename boost::detail::decay_imp<Ty, boost::is_array<Ty>::value, boost::is_function<Ty>::value>::type type;
};

#if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)

template <class T> using decay_t = typename decay<T>::type;

#endif

} // namespace boost

#endif // BOOST_TT_DECAY_HPP_INCLUDED
