forked from boostorg/utility
c730ab4ffb
Parameter library explicit markup for expected failures value_init.hpp: Borland workarounds Use angle-includes consistently [SVN r35084]
82 lines
1.4 KiB
C++
82 lines
1.4 KiB
C++
// (C) 2002, Fernando Luis Cacciola Carballal.
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// 21 Ago 2002 (Created) Fernando Cacciola
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//
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#ifndef BOOST_UTILITY_VALUE_INIT_21AGO2002_HPP
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#define BOOST_UTILITY_VALUE_INIT_21AGO2002_HPP
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#include <boost/detail/select_type.hpp>
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#include <boost/type_traits/cv_traits.hpp>
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#include <boost/detail/workaround.hpp>
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namespace boost {
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namespace vinit_detail {
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template<class T>
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class const_T_base
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{
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protected :
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const_T_base() : x() {}
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T x ;
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} ;
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template<class T>
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struct non_const_T_base
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{
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protected :
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non_const_T_base() : x() {}
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mutable T x ;
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} ;
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template<class T>
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struct select_base
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{
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typedef
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#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
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typename
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#endif
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::boost::detail::if_true< ::boost::is_const<T>::value >
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::template then< const_T_base<T>, non_const_T_base<T> >::type type ;
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} ;
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} // namespace vinit_detail
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template<class T>
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class value_initialized : private vinit_detail::select_base<T>::type
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{
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public :
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value_initialized() {}
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operator T&() const { return this->x ; }
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T& data() const { return this->x ; }
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} ;
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template<class T>
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T const& get ( value_initialized<T> const& x )
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{
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return x.data() ;
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}
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template<class T>
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T& get ( value_initialized<T>& x )
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{
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return x.data() ;
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}
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} // namespace boost
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#endif
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