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- // (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
- // 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_ADD_REFERENCE_HPP_INCLUDED
- #define BOOST_TT_ADD_REFERENCE_HPP_INCLUDED
- #include <boost/detail/workaround.hpp>
- #include <boost/config.hpp>
- namespace boost {
- namespace detail {
- //
- // We can't filter out rvalue_references at the same level as
- // references or we get ambiguities from msvc:
- //
- template <typename T>
- struct add_reference_impl
- {
- typedef T& type;
- };
- #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
- template <typename T>
- struct add_reference_impl<T&&>
- {
- typedef T&& type;
- };
- #endif
- } // namespace detail
- template <class T> struct add_reference
- {
- typedef typename boost::detail::add_reference_impl<T>::type type;
- };
- template <class T> struct add_reference<T&>
- {
- typedef T& type;
- };
- // these full specialisations are always required:
- template <> struct add_reference<void> { typedef void type; };
- #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
- template <> struct add_reference<const void> { typedef const void type; };
- template <> struct add_reference<const volatile void> { typedef const volatile void type; };
- template <> struct add_reference<volatile void> { typedef volatile void type; };
- #endif
- #if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
- template <class T> using add_reference_t = typename add_reference<T>::type;
- #endif
- } // namespace boost
- #endif // BOOST_TT_ADD_REFERENCE_HPP_INCLUDED
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