151 lines
5.3 KiB
C++
151 lines
5.3 KiB
C++
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//////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2012-2012.
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// Distributed under the Boost Software License, Version 1.0.
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// (See 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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// See http://www.boost.org/libs/move for documentation.
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//
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//////////////////////////////////////////////////////////////////////////////
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//! \file
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//! This header includes core utilities from <tt><boost/move/utility_core.hpp></tt> and defines
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//! some more advanced utilities such as:
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#ifndef BOOST_MOVE_MOVE_UTILITY_HPP
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#define BOOST_MOVE_MOVE_UTILITY_HPP
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#ifndef BOOST_CONFIG_HPP
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# include <boost/config.hpp>
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#endif
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#
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#if defined(BOOST_HAS_PRAGMA_ONCE)
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# pragma once
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#endif
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#include <boost/move/detail/config_begin.hpp>
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#include <boost/move/detail/workaround.hpp> //forceinline
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#include <boost/move/utility_core.hpp>
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#include <boost/move/traits.hpp>
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#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && !defined(BOOST_MOVE_DOXYGEN_INVOKED)
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namespace boost {
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//////////////////////////////////////////////////////////////////////////////
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//
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// move_if_noexcept()
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//
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//////////////////////////////////////////////////////////////////////////////
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template <class T>
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BOOST_MOVE_FORCEINLINE typename ::boost::move_detail::enable_if_c
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< enable_move_utility_emulation<T>::value && !has_move_emulation_enabled<T>::value
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, typename ::boost::move_detail::add_const<T>::type &
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>::type
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move_if_noexcept(T& x) BOOST_NOEXCEPT
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{
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return x;
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}
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template <class T>
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BOOST_MOVE_FORCEINLINE typename ::boost::move_detail::enable_if_c
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< enable_move_utility_emulation<T>::value && has_move_emulation_enabled<T>::value
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&& ::boost::move_detail::is_nothrow_move_constructible_or_uncopyable<T>::value, rv<T>&>::type
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move_if_noexcept(T& x) BOOST_NOEXCEPT
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{
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return *static_cast<rv<T>* >(::boost::move_detail::addressof(x));
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}
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template <class T>
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BOOST_MOVE_FORCEINLINE typename ::boost::move_detail::enable_if_c
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< enable_move_utility_emulation<T>::value && has_move_emulation_enabled<T>::value
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&& ::boost::move_detail::is_nothrow_move_constructible_or_uncopyable<T>::value
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, rv<T>&
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>::type
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move_if_noexcept(rv<T>& x) BOOST_NOEXCEPT
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{
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return x;
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}
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template <class T>
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BOOST_MOVE_FORCEINLINE typename ::boost::move_detail::enable_if_c
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< enable_move_utility_emulation<T>::value && has_move_emulation_enabled<T>::value
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&& !::boost::move_detail::is_nothrow_move_constructible_or_uncopyable<T>::value
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, typename ::boost::move_detail::add_const<T>::type &
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>::type
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move_if_noexcept(T& x) BOOST_NOEXCEPT
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{
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return x;
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}
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template <class T>
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BOOST_MOVE_FORCEINLINE typename ::boost::move_detail::enable_if_c
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< enable_move_utility_emulation<T>::value && has_move_emulation_enabled<T>::value
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&& !::boost::move_detail::is_nothrow_move_constructible_or_uncopyable<T>::value
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, typename ::boost::move_detail::add_const<T>::type &
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>::type
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move_if_noexcept(rv<T>& x) BOOST_NOEXCEPT
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{
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return x;
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}
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} //namespace boost
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#else //#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && !defined(BOOST_MOVE_DOXYGEN_INVOKED)
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#if defined(BOOST_MOVE_USE_STANDARD_LIBRARY_MOVE)
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#include <utility>
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namespace boost{
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using ::std::move_if_noexcept;
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} //namespace boost
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#else //!BOOST_MOVE_USE_STANDARD_LIBRARY_MOVE
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namespace boost {
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//////////////////////////////////////////////////////////////////////////////
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//
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// move_if_noexcept()
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//
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//////////////////////////////////////////////////////////////////////////////
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#if defined(BOOST_MOVE_DOXYGEN_INVOKED)
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//! This function provides a way to convert a reference into a rvalue reference
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//! in compilers with rvalue references. For other compilers converts T & into
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//! <i>::boost::rv<T> &</i> so that move emulation is activated. Reference
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//! would be converted to rvalue reference only if input type is nothrow move
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//! constructible or if it has no copy constructor. In all other cases const
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//! reference would be returned
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template <class T>
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rvalue_reference_or_const_lvalue_reference move_if_noexcept(input_reference) noexcept;
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#else //BOOST_MOVE_DOXYGEN_INVOKED
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template <class T>
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BOOST_MOVE_FORCEINLINE typename ::boost::move_detail::enable_if_c
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< ::boost::move_detail::is_nothrow_move_constructible_or_uncopyable<T>::value, T&&>::type
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move_if_noexcept(T& x) BOOST_NOEXCEPT
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{ return ::boost::move(x); }
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template <class T>
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BOOST_MOVE_FORCEINLINE typename ::boost::move_detail::enable_if_c
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< !::boost::move_detail::is_nothrow_move_constructible_or_uncopyable<T>::value, const T&>::type
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move_if_noexcept(T& x) BOOST_NOEXCEPT
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{ return x; }
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#endif //BOOST_MOVE_DOXYGEN_INVOKED
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} //namespace boost {
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#endif //#if defined(BOOST_MOVE_USE_STANDARD_LIBRARY_MOVE)
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#endif //BOOST_NO_CXX11_RVALUE_REFERENCES
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#include <boost/move/detail/config_end.hpp>
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#endif //#ifndef BOOST_MOVE_MOVE_UTILITY_HPP
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