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- // (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes,
- // Howard Hinnant and John Maddock 2000.
- // (C) Copyright Mat Marcus, Jesse Jones and Adobe Systems Inc 2001
- // 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.
- // Fixed is_pointer, is_lvalue_reference, is_const, is_volatile, is_same,
- // is_member_pointer based on the Simulated Partial Specialization work
- // of Mat Marcus and Jesse Jones. See http://opensource.adobe.com or
- // http://groups.yahoo.com/group/boost/message/5441
- // Some workarounds in here use ideas suggested from "Generic<Programming>:
- // Mappings between Types and Values"
- // by Andrei Alexandrescu (see http://www.cuj.com/experts/1810/alexandr.html).
- #ifndef BOOST_TT_IS_LVALUE_REFERENCE_HPP_INCLUDED
- #define BOOST_TT_IS_LVALUE_REFERENCE_HPP_INCLUDED
- #include <boost/type_traits/integral_constant.hpp>
- namespace boost {
- #if defined( __CODEGEARC__ )
- template <class T> struct is_lvalue_reference : public integral_constant<bool, __is_reference(T)>{};
- #else
- template <class T> struct is_lvalue_reference : public false_type{};
- template <class T> struct is_lvalue_reference<T&> : public true_type{};
- #if defined(BOOST_ILLEGAL_CV_REFERENCES)
- // these are illegal specialisations; cv-qualifies applied to
- // references have no effect according to [8.3.2p1],
- // C++ Builder requires them though as it treats cv-qualified
- // references as distinct types...
- template <class T> struct is_lvalue_reference<T&const> : public true_type{};
- template <class T> struct is_lvalue_reference<T&volatile> : public true_type{};
- template <class T> struct is_lvalue_reference<T&const volatile> : public true_type{};
- #endif
- #endif
- } // namespace boost
- #endif // BOOST_TT_IS_REFERENCE_HPP_INCLUDED
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