// Copyright 2002, Fernando Luis Cacciola Carballal.

 //

 // Distributed under 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)

 //

 // 21 Ago 2002 (Created) Fernando Cacciola

 //

 #ifndef BOOST_UTILITY_VALUE_INIT_21AGO2002_HPP

 #define BOOST_UTILITY_VALUE_INIT_21AGO2002_HPP

 #include "boost/detail/select_type.hpp"

 #include "boost/type_traits/cv_traits.hpp"

 namespace boost {

 namespace vinit_detail {

 template<class T>

 class const_T_base

 {

   protected :

    const_T_base() : x() {}

    T x ;

 } ;

 template<class T>

 struct non_const_T_base

 {

   protected :

    non_const_T_base() : x() {}

    mutable T x ;

 } ;

 template<class T>

 struct select_base

 {

   typedef typename

     boost::detail::if_true< ::boost::is_const<T>::value >

       ::template then< const_T_base<T>, non_const_T_base<T> >::type type ;

 } ;

 } // namespace vinit_detail

 template<class T>

 class value_initialized : private vinit_detail::select_base<T>::type

 {

   public :

     value_initialized() {}

     operator T&() const { return this->x ; }

     T& data() const { return this->x ; }

 } ;

 template<class T>

 T const& get ( value_initialized<T> const& x )

 {

   return x.data() ;

 }

 template<class T>

 T& get ( value_initialized<T>& x )

 {

   return x.data() ;

 }

 } // namespace boost

 #endif