| |
| // (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 |
| |