60 lines
1.6 KiB
Plaintext
60 lines
1.6 KiB
Plaintext
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// (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
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// Use, modification and distribution are subject to the Boost Software License,
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// Version 1.0. (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/type_traits for most recent version including documentation.
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#ifndef BOOST_TT_ADD_REFERENCE_HPP_INCLUDED
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#define BOOST_TT_ADD_REFERENCE_HPP_INCLUDED
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#include <boost/detail/workaround.hpp>
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#include <boost/config.hpp>
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namespace boost {
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namespace detail {
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//
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// We can't filter out rvalue_references at the same level as
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// references or we get ambiguities from msvc:
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//
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template <typename T>
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struct add_reference_impl
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{
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typedef T& type;
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};
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#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
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template <typename T>
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struct add_reference_impl<T&&>
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{
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typedef T&& type;
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};
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#endif
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} // namespace detail
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template <class T> struct add_reference
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{
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typedef typename boost::detail::add_reference_impl<T>::type type;
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};
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template <class T> struct add_reference<T&>
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{
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typedef T& type;
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};
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// these full specialisations are always required:
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template <> struct add_reference<void> { typedef void type; };
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#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
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template <> struct add_reference<const void> { typedef const void type; };
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template <> struct add_reference<const volatile void> { typedef const volatile void type; };
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template <> struct add_reference<volatile void> { typedef volatile void type; };
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#endif
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} // namespace boost
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#endif // BOOST_TT_ADD_REFERENCE_HPP_INCLUDED
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