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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\type_traits\is_const.hpp
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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_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
: // Mappings between Types and Values" // by Andrei Alexandrescu (see http://www.cuj.com/experts/1810/alexandr.html). #ifndef BOOST_TT_IS_CONST_HPP_INCLUDED #define BOOST_TT_IS_CONST_HPP_INCLUDED #include
#include
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION # include
# ifdef __GNUC__ # include
# endif # if BOOST_WORKAROUND(BOOST_MSVC, < 1400) # include
# endif #else # include
# include
# include
# include
#endif // should be the last #include #include
namespace boost { #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION //* is a type T declared const - is_const
#if BOOST_WORKAROUND(BOOST_MSVC, < 1400) BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_const,T,::boost::detail::cv_traits_imp
::type*>::is_const) #else BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_const,T,::boost::detail::cv_traits_imp
::is_const) #endif BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_const,T&,false) #if defined(__BORLANDC__) && (__BORLANDC__ < 0x600) // 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_const,T& const,false) BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_const,T& volatile,false) BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_const,T& const volatile,false) #endif #if defined(__GNUC__) && (__GNUC__ < 3) // special case for gcc where illegally cv-qualified reference types can be // generated in some corner cases: BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_const,T const,!(::boost::is_reference
::value)) BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_const,T volatile const,!(::boost::is_reference
::value)) #endif #else namespace detail { using ::boost::type_traits::yes_type; using ::boost::type_traits::no_type; yes_type is_const_tester(const volatile void*); no_type is_const_tester(volatile void *); template
struct is_const_helper : ::boost::type_traits::false_result { }; template <> struct is_const_helper
{ template
struct result_ { static T* t; BOOST_STATIC_CONSTANT(bool, value = ( sizeof(detail::yes_type) == sizeof(detail::is_const_tester(t)) )); }; }; template <> struct is_const_helper
{ template
struct result_ { static T t; BOOST_STATIC_CONSTANT(bool, value = ( sizeof(detail::yes_type) == sizeof(detail::is_const_tester(&t)) )); }; }; template
struct is_const_impl : is_const_helper< is_reference
::value , is_array
::value >::template result_
{ }; BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_const,void,false) #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_const,void const,true) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_const,void volatile,false) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_const,void const volatile,true) #endif } // namespace detail //* is a type T declared const - is_const
BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_const,T,::boost::detail::is_const_impl
::value) #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION } // namespace boost #include
#endif // BOOST_TT_IS_CONST_HPP_INCLUDED
is_const.hpp
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