update boost to 1.44

[features.git] / boost / boost / type_traits / is_reference.hpp

diff --git a/boost/boost/type_traits/is_reference.hpp b/boost/boost/type_traits/is_reference.hpp
index dcf84db70936dc7cd5a88588595468f267498a3d..49b5f9ff0fb5af611d4a82585e7121dc813084fa 100644 (file)
--- a/boost/boost/type_traits/is_reference.hpp
+++ b/boost/boost/type_traits/is_reference.hpp
@@ -1,6 +1,6 @@
 
 //  (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, 
-//      Howard Hinnant and John Maddock 2000. 
+//      Howard Hinnant and John Maddock 2000, 2010. 
 //  (C) Copyright Mat Marcus, Jesse Jones and Adobe Systems Inc 2001
 
 //  Use, modification and distribution are subject to the Boost Software License,
@@ -9,107 +9,34 @@
 //
 //  See http://www.boost.org/libs/type_traits for most recent version including documentation.
 
-//    Fixed is_pointer, is_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_REFERENCE_HPP_INCLUDED
 #define BOOST_TT_IS_REFERENCE_HPP_INCLUDED
 
 #include <boost/type_traits/config.hpp>
-
-#ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
-#   include <boost/type_traits/detail/yes_no_type.hpp>
-#   include <boost/type_traits/detail/wrap.hpp>
-#endif
+#include <boost/type_traits/is_lvalue_reference.hpp>
+#include <boost/type_traits/is_rvalue_reference.hpp>
+#include <boost/type_traits/ice.hpp>
 
 // should be the last #include
 #include <boost/type_traits/detail/bool_trait_def.hpp>
 
 namespace boost {
 
-#if defined( __CODEGEARC__ )
-BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_reference,T,__is_reference(T))
-#elif !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
-
-BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_reference,T,false)
-BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_reference,T&,true)
-
-#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...
-BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_reference,T& const,true)
-BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_reference,T& volatile,true)
-BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_reference,T& const volatile,true)
-#endif
-
-#if defined(__GNUC__) && (__GNUC__ < 3)
-// these allow us to work around illegally cv-qualified reference
-// types.
-BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_reference,T const ,::boost::is_reference<T>::value)
-BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_reference,T volatile ,::boost::is_reference<T>::value)
-BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_reference,T const volatile ,::boost::is_reference<T>::value)
-// However, the above specializations confuse gcc 2.96 unless we also
-// supply these specializations for array types
-BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_2(typename T,unsigned long N,is_reference,T[N],false)
-BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_2(typename T,unsigned long N,is_reference,const T[N],false)
-BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_2(typename T,unsigned long N,is_reference,volatile T[N],false)
-BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_2(typename T,unsigned long N,is_reference,const volatile T[N],false)
-#endif
-
-#else
-
-#ifdef BOOST_MSVC
-#   pragma warning(push)
-#   pragma warning(disable: 4181 4097)
-#endif
-
 namespace detail {
 
-using ::boost::type_traits::yes_type;
-using ::boost::type_traits::no_type;
-using ::boost::type_traits::wrap;
-
-template <class T> T&(* is_reference_helper1(wrap<T>) )(wrap<T>);
-char is_reference_helper1(...);
-
-template <class T> no_type is_reference_helper2(T&(*)(wrap<T>));
-yes_type is_reference_helper2(...);
-
 template <typename T>
 struct is_reference_impl
 {
-    BOOST_STATIC_CONSTANT(
-        bool, value = sizeof(
-            ::boost::detail::is_reference_helper2(
-                ::boost::detail::is_reference_helper1(::boost::type_traits::wrap<T>()))) == 1
-        );
+   BOOST_STATIC_CONSTANT(bool, value =
+      (::boost::type_traits::ice_or<
+         ::boost::is_lvalue_reference<T>::value, ::boost::is_rvalue_reference<T>::value
+       >::value));
 };
 
-BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_reference,void,false)
-#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
-BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_reference,void const,false)
-BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_reference,void volatile,false)
-BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_reference,void const volatile,false)
-#endif
-
 } // namespace detail
 
 BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_reference,T,::boost::detail::is_reference_impl<T>::value)
 
-#ifdef BOOST_MSVC
-#   pragma warning(pop)
-#endif
-
-#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
-
 } // namespace boost
 
 #include <boost/type_traits/detail/bool_trait_undef.hpp>