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Ruta de la carpeta: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\iostreams\detail\wrap_unwrap.hpp
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// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com) // (C) Copyright 2003-2007 Jonathan Turkanis // 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.) // See http://www.boost.org/libs/iostreams for documentation. #ifndef BOOST_IOSTREAMS_DETAIL_WRAP_UNWRAP_HPP_INCLUDED #define BOOST_IOSTREAMS_DETAIL_WRAP_UNWRAP_HPP_INCLUDED #if defined(_MSC_VER) && (_MSC_VER >= 1020) # pragma once #endif #include
// SFINAE, MSVC. #include
#include
#include
// is_std_io. #include
#include
#include
#include
#include
namespace boost { namespace iostreams { namespace detail { //------------------Definition of wrap/unwrap traits--------------------------// template
struct wrapped_type : mpl::if_
, reference_wrapper
, T> { }; template
struct unwrapped_type : unwrap_reference
{ }; template
struct unwrap_ios : mpl::eval_if< is_std_io
, unwrap_reference
, mpl::identity
> { }; //------------------Definition of wrap----------------------------------------// #ifndef BOOST_NO_SFINAE //----------------------------------------------------// template
inline T wrap(const T& t BOOST_IOSTREAMS_DISABLE_IF_STREAM(T)) { return t; } template
inline typename wrapped_type
::type wrap(T& t BOOST_IOSTREAMS_ENABLE_IF_STREAM(T)) { return boost::ref(t); } #else // #ifndef BOOST_NO_SFINAE //-------------------------------------------// template
inline typename wrapped_type
::type // BCC 5.x needs namespace qualification. wrap_impl(const T& t, mpl::true_) { return boost::ref(const_cast
(t)); } template
inline typename wrapped_type
::type // BCC 5.x needs namespace qualification. wrap_impl(T& t, mpl::true_) { return boost::ref(t); } template
inline typename wrapped_type
::type wrap_impl(const T& t, mpl::false_) { return t; } template
inline typename wrapped_type
::type wrap_impl(T& t, mpl::false_) { return t; } template
inline typename wrapped_type
::type wrap(const T& t) { return wrap_impl(t, is_std_io
()); } template
inline typename wrapped_type
::type wrap(T& t) { return wrap_impl(t, is_std_io
()); } #endif // #ifndef BOOST_NO_SFINAE //------------------------------------------// //------------------Definition of unwrap--------------------------------------// #if !BOOST_WORKAROUND(BOOST_MSVC, < 1310) //----------------------------------// template
typename unwrapped_type
::type& unwrap(const reference_wrapper
& ref) { return ref.get(); } template
typename unwrapped_type
::type& unwrap(T& t) { return t; } template
const typename unwrapped_type
::type& unwrap(const T& t) { return t; } #else // #if !BOOST_WORKAROUND(BOOST_MSVC, < 1310) //-------------------------// // Since unwrap is a potential bottleneck, we avoid runtime tag dispatch. template
struct unwrap_impl; template<> struct unwrap_impl
{ template
static typename unwrapped_type
::type& unwrap(const T& t) { return t.get(); } }; template<> struct unwrap_impl
{ template
static typename unwrapped_type
::type& unwrap(const T& t) { return const_cast
(t); } }; template
typename unwrapped_type
::type& unwrap(const T& t) { return unwrap_impl
::value>::unwrap(t); } #endif // #if !BOOST_WORKAROUND(BOOST_MSVC, < 1310) //------------------------// } } } // End namespaces detail, iostreams, boost. #endif // #ifndef BOOST_IOSTREAMS_DETAIL_WRAP_UNWRAP_HPP_INCLUDED
wrap_unwrap.hpp
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