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is_enum.hpp - Hosted on DriveHQ Cloud IT Platform
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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\type_traits\is_enum.hpp
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// (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, Howard // Hinnant & John Maddock 2000. // 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. #ifndef BOOST_TT_IS_ENUM_HPP_INCLUDED #define BOOST_TT_IS_ENUM_HPP_INCLUDED #include
#include
#include
#include
#include
#ifdef __GNUC__ #include
#endif #include
#if defined(BOOST_TT_HAS_CONFORMING_IS_CLASS_IMPLEMENTATION) # include
# include
#endif // should be the last #include #include
namespace boost { #if !(defined(__BORLANDC__) && (__BORLANDC__ <= 0x551)) namespace detail { #if defined(BOOST_TT_HAS_CONFORMING_IS_CLASS_IMPLEMENTATION) template
struct is_class_or_union { BOOST_STATIC_CONSTANT(bool, value = (::boost::type_traits::ice_or< ::boost::is_class
::value , ::boost::is_union
::value >::value)); }; #else template
struct is_class_or_union { # if BOOST_WORKAROUND(BOOST_MSVC, < 1300) || BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x581))// we simply can't detect it this way. BOOST_STATIC_CONSTANT(bool, value = false); # else template
static ::boost::type_traits::yes_type is_class_or_union_tester(void(U::*)(void)); # if BOOST_WORKAROUND(BOOST_MSVC, == 1300) \ || BOOST_WORKAROUND(__MWERKS__, <= 0x3000) // no SFINAE static ::boost::type_traits::no_type is_class_or_union_tester(...); BOOST_STATIC_CONSTANT( bool, value = sizeof(is_class_or_union_tester(0)) == sizeof(::boost::type_traits::yes_type)); # else template
static ::boost::type_traits::no_type is_class_or_union_tester(...); BOOST_STATIC_CONSTANT( bool, value = sizeof(is_class_or_union_tester
(0)) == sizeof(::boost::type_traits::yes_type)); # endif # endif }; #endif struct int_convertible { int_convertible(int); }; // Don't evaluate convertibility to int_convertible unless the type // is non-arithmetic. This suppresses warnings with GCC. template
struct is_enum_helper { template
struct type { BOOST_STATIC_CONSTANT(bool, value = false); }; }; template <> struct is_enum_helper
{ template
struct type : ::boost::is_convertible
::type,::boost::detail::int_convertible> { }; }; template
struct is_enum_impl { //typedef ::boost::add_reference
ar_t; //typedef typename ar_t::type r_type; #if defined(__GNUC__) #ifdef BOOST_TT_HAS_CONFORMING_IS_CLASS_IMPLEMENTATION // We MUST check for is_class_or_union on conforming compilers in // order to correctly deduce that noncopyable types are not enums // (dwa 2002/04/15)... BOOST_STATIC_CONSTANT(bool, selector = (::boost::type_traits::ice_or< ::boost::is_arithmetic
::value , ::boost::is_reference
::value , ::boost::is_function
::value , is_class_or_union
::value , is_array
::value >::value)); #else // ...however, not checking is_class_or_union on non-conforming // compilers prevents a dependency recursion. BOOST_STATIC_CONSTANT(bool, selector = (::boost::type_traits::ice_or< ::boost::is_arithmetic
::value , ::boost::is_reference
::value , ::boost::is_function
::value , is_array
::value >::value)); #endif // BOOST_TT_HAS_CONFORMING_IS_CLASS_IMPLEMENTATION #else // !defined(__GNUC__): BOOST_STATIC_CONSTANT(bool, selector = (::boost::type_traits::ice_or< ::boost::is_arithmetic
::value , ::boost::is_reference
::value , is_class_or_union
::value , is_array
::value >::value)); #endif #if BOOST_WORKAROUND(__BORLANDC__, < 0x600) typedef ::boost::detail::is_enum_helper< ::boost::detail::is_enum_impl
::selector > se_t; #else typedef ::boost::detail::is_enum_helper
se_t; #endif typedef typename se_t::template type
helper; BOOST_STATIC_CONSTANT(bool, value = helper::value); }; // these help on compilers with no partial specialization support: BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_enum,void,false) #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_enum,void const,false) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_enum,void volatile,false) BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_enum,void const volatile,false) #endif } // namespace detail BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_enum,T,::boost::detail::is_enum_impl
::value) #else // __BORLANDC__ // // buggy is_convertible prevents working // implementation of is_enum: BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_enum,T,false) #endif } // namespace boost #include
#endif // BOOST_TT_IS_ENUM_HPP_INCLUDED
is_enum.hpp
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