Boost C++ Libraries of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards


//  (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
//  See 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 or 
//    Some workarounds in here use ideas suggested from "Generic<Programming>: 
//    Mappings between Types and Values" 
//    by Andrei Alexandrescu (see


#include <boost/type_traits/integral_constant.hpp>

namespace boost {

#if defined( BOOST_CODEGEARC )
   template <class T> struct is_lvalue_reference : public integral_constant<bool, __is_reference(T)>{};

   template <class T> struct is_lvalue_reference : public false_type{};
   template <class T> struct is_lvalue_reference<T&> : public true_type{};

// 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{};


} // namespace boost