| |
| // (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<Programming>: |
| // Mappings between Types and Values" |
| // by Andrei Alexandrescu (see http://www.cuj.com/experts/1810/alexandr.html). |
| |
| |
| #ifndef NDNBOOST_TT_IS_POINTER_HPP_INCLUDED |
| #define NDNBOOST_TT_IS_POINTER_HPP_INCLUDED |
| |
| #include <ndnboost/type_traits/is_member_pointer.hpp> |
| #include <ndnboost/type_traits/detail/ice_and.hpp> |
| #include <ndnboost/type_traits/detail/ice_not.hpp> |
| #include <ndnboost/type_traits/config.hpp> |
| #if !NDNBOOST_WORKAROUND(NDNBOOST_MSVC,<=1300) |
| #include <ndnboost/type_traits/remove_cv.hpp> |
| #endif |
| |
| #ifdef NDNBOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
| # include <ndnboost/type_traits/is_reference.hpp> |
| # include <ndnboost/type_traits/is_array.hpp> |
| # include <ndnboost/type_traits/detail/is_function_ptr_tester.hpp> |
| # include <ndnboost/type_traits/detail/false_result.hpp> |
| # include <ndnboost/type_traits/detail/ice_or.hpp> |
| #endif |
| |
| // should be the last #include |
| #include <ndnboost/type_traits/detail/bool_trait_def.hpp> |
| |
| namespace ndnboost { |
| |
| #if defined( __CODEGEARC__ ) |
| NDNBOOST_TT_AUX_BOOL_TRAIT_DEF1(is_pointer,T,__is_pointer(T)) |
| #elif !defined(NDNBOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) |
| |
| namespace detail { |
| |
| template< typename T > struct is_pointer_helper |
| { |
| NDNBOOST_STATIC_CONSTANT(bool, value = false); |
| }; |
| |
| # define TT_AUX_BOOL_TRAIT_HELPER_PARTIAL_SPEC(helper,sp,result) \ |
| template< typename T > struct helper<sp> \ |
| { \ |
| NDNBOOST_STATIC_CONSTANT(bool, value = result); \ |
| }; \ |
| /**/ |
| |
| TT_AUX_BOOL_TRAIT_HELPER_PARTIAL_SPEC(is_pointer_helper,T*,true) |
| |
| # undef TT_AUX_BOOL_TRAIT_HELPER_PARTIAL_SPEC |
| |
| template< typename T > |
| struct is_pointer_impl |
| { |
| #if NDNBOOST_WORKAROUND(NDNBOOST_MSVC,<=1300) |
| NDNBOOST_STATIC_CONSTANT(bool, value = |
| (::ndnboost::type_traits::ice_and< |
| ::ndnboost::detail::is_pointer_helper<T>::value |
| , ::ndnboost::type_traits::ice_not< |
| ::ndnboost::is_member_pointer<T>::value |
| >::value |
| >::value) |
| ); |
| #else |
| NDNBOOST_STATIC_CONSTANT(bool, value = |
| (::ndnboost::type_traits::ice_and< |
| ::ndnboost::detail::is_pointer_helper<typename remove_cv<T>::type>::value |
| , ::ndnboost::type_traits::ice_not< |
| ::ndnboost::is_member_pointer<T>::value |
| >::value |
| >::value) |
| ); |
| #endif |
| }; |
| |
| } // namespace detail |
| |
| NDNBOOST_TT_AUX_BOOL_TRAIT_DEF1(is_pointer,T,::ndnboost::detail::is_pointer_impl<T>::value) |
| |
| #if defined(__BORLANDC__) && !defined(__COMO__) && (__BORLANDC__ < 0x600) |
| NDNBOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_pointer,T&,false) |
| NDNBOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_pointer,T& const,false) |
| NDNBOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_pointer,T& volatile,false) |
| NDNBOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_pointer,T& const volatile,false) |
| #endif |
| |
| #else // no partial template specialization |
| |
| namespace detail { |
| |
| struct pointer_helper |
| { |
| pointer_helper(const volatile void*); |
| }; |
| |
| yes_type NDNBOOST_TT_DECL is_pointer_tester(pointer_helper); |
| no_type NDNBOOST_TT_DECL is_pointer_tester(...); |
| |
| template <bool> |
| struct is_pointer_select |
| : public ::ndnboost::type_traits::false_result |
| { |
| }; |
| |
| template <> |
| struct is_pointer_select<false> |
| { |
| template <typename T> struct result_ |
| { |
| static T& make_t(); |
| NDNBOOST_STATIC_CONSTANT(bool, value = |
| (::ndnboost::type_traits::ice_or< |
| (1 == sizeof(is_pointer_tester(make_t()))), |
| (1 == sizeof(type_traits::is_function_ptr_tester(make_t()))) |
| >::value)); |
| }; |
| }; |
| |
| template <typename T> |
| struct is_pointer_impl |
| : public is_pointer_select< |
| ::ndnboost::type_traits::ice_or< |
| ::ndnboost::is_reference<T>::value |
| , ::ndnboost::is_array<T>::value |
| >::value |
| >::template result_<T> |
| { |
| }; |
| |
| NDNBOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pointer,void,false) |
| #ifndef NDNBOOST_NO_CV_VOID_SPECIALIZATIONS |
| NDNBOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pointer,void const,false) |
| NDNBOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pointer,void volatile,false) |
| NDNBOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pointer,void const volatile,false) |
| #endif |
| |
| } // namespace detail |
| |
| NDNBOOST_TT_AUX_BOOL_TRAIT_DEF1(is_pointer,T,::ndnboost::detail::is_pointer_impl<T>::value) |
| |
| #endif // NDNBOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
| |
| } // namespace ndnboost |
| |
| #include <ndnboost/type_traits/detail/bool_trait_undef.hpp> |
| |
| #endif // NDNBOOST_TT_IS_POINTER_HPP_INCLUDED |