Jeff Thompson | f7d4994 | 2013-08-01 16:47:40 -0700 | [diff] [blame] | 1 | |
| 2 | // (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, |
| 3 | // Howard Hinnant and John Maddock 2000. |
| 4 | // (C) Copyright Mat Marcus, Jesse Jones and Adobe Systems Inc 2001 |
| 5 | |
| 6 | // Use, modification and distribution are subject to the Boost Software License, |
| 7 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
| 8 | // http://www.boost.org/LICENSE_1_0.txt). |
| 9 | // |
| 10 | // See http://www.boost.org/libs/type_traits for most recent version including documentation. |
| 11 | |
| 12 | // Fixed is_pointer, is_reference, is_const, is_volatile, is_same, |
| 13 | // is_member_pointer based on the Simulated Partial Specialization work |
| 14 | // of Mat Marcus and Jesse Jones. See http://opensource.adobe.com or |
| 15 | // http://groups.yahoo.com/group/boost/message/5441 |
| 16 | // Some workarounds in here use ideas suggested from "Generic<Programming>: |
| 17 | // Mappings between Types and Values" |
| 18 | // by Andrei Alexandrescu (see http://www.cuj.com/experts/1810/alexandr.html). |
| 19 | |
| 20 | |
| 21 | #ifndef BOOST_TT_IS_SAME_HPP_INCLUDED |
| 22 | #define BOOST_TT_IS_SAME_HPP_INCLUDED |
| 23 | |
Jeff Thompson | 2277ce5 | 2013-08-01 17:34:11 -0700 | [diff] [blame] | 24 | #include <ndnboost/type_traits/config.hpp> |
Jeff Thompson | f7d4994 | 2013-08-01 16:47:40 -0700 | [diff] [blame] | 25 | #ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
Jeff Thompson | 2277ce5 | 2013-08-01 17:34:11 -0700 | [diff] [blame] | 26 | #include <ndnboost/type_traits/detail/yes_no_type.hpp> |
| 27 | #include <ndnboost/type_traits/detail/ice_and.hpp> |
| 28 | #include <ndnboost/type_traits/is_reference.hpp> |
Jeff Thompson | f7d4994 | 2013-08-01 16:47:40 -0700 | [diff] [blame] | 29 | #endif |
| 30 | // should be the last #include |
Jeff Thompson | 2277ce5 | 2013-08-01 17:34:11 -0700 | [diff] [blame] | 31 | #include <ndnboost/type_traits/detail/bool_trait_def.hpp> |
Jeff Thompson | f7d4994 | 2013-08-01 16:47:40 -0700 | [diff] [blame] | 32 | |
| 33 | namespace ndnboost { |
| 34 | |
| 35 | #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
| 36 | |
| 37 | BOOST_TT_AUX_BOOL_TRAIT_DEF2(is_same,T,U,false) |
| 38 | BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_1(typename T,is_same,T,T,true) |
| 39 | #if BOOST_WORKAROUND(__BORLANDC__, < 0x600) |
| 40 | // without this, Borland's compiler gives the wrong answer for |
| 41 | // references to arrays: |
| 42 | BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_1(typename T,is_same,T&,T&,true) |
| 43 | #endif |
| 44 | |
| 45 | #else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
| 46 | |
| 47 | namespace detail { |
| 48 | |
| 49 | #ifdef BOOST_MSVC |
| 50 | // the following VC6 specific implementation is *NOT* legal |
| 51 | // C++, but has the advantage that it works for incomplete |
| 52 | // types. |
| 53 | |
| 54 | template< typename T1 > |
| 55 | struct is_same_part_1 |
| 56 | { |
| 57 | template<typename T2> struct part_2 { enum { value = false }; }; |
| 58 | template<> struct part_2<T1> { enum { value = true }; }; |
| 59 | }; |
| 60 | |
| 61 | template< typename T1, typename T2 > |
| 62 | struct is_same_impl |
| 63 | { |
| 64 | enum { value = ndnboost::detail::is_same_part_1<T1>::template part_2<T2>::value }; |
| 65 | }; |
| 66 | |
| 67 | #else // generic "no-partial-specialization" version |
| 68 | |
| 69 | template <typename T> |
| 70 | ::ndnboost::type_traits::yes_type |
| 71 | BOOST_TT_DECL is_same_tester(T*, T*); |
| 72 | |
| 73 | ::ndnboost::type_traits::no_type |
| 74 | BOOST_TT_DECL is_same_tester(...); |
| 75 | |
| 76 | template <typename T, typename U> |
| 77 | struct is_same_impl |
| 78 | { |
| 79 | static T t; |
| 80 | static U u; |
| 81 | |
| 82 | BOOST_STATIC_CONSTANT(bool, value = |
| 83 | (::ndnboost::type_traits::ice_and< |
| 84 | (sizeof(type_traits::yes_type) == sizeof(ndnboost::detail::is_same_tester(&t,&u))), |
| 85 | (::ndnboost::is_reference<T>::value == ::ndnboost::is_reference<U>::value), |
| 86 | (sizeof(T) == sizeof(U)) |
| 87 | >::value)); |
| 88 | }; |
| 89 | |
| 90 | #endif // BOOST_MSVC |
| 91 | |
| 92 | } // namespace detail |
| 93 | |
| 94 | BOOST_TT_AUX_BOOL_TRAIT_DEF2(is_same,T,U,(::ndnboost::detail::is_same_impl<T,U>::value)) |
| 95 | |
| 96 | #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
| 97 | |
| 98 | } // namespace ndnboost |
| 99 | |
Jeff Thompson | 2277ce5 | 2013-08-01 17:34:11 -0700 | [diff] [blame] | 100 | #include <ndnboost/type_traits/detail/bool_trait_undef.hpp> |
Jeff Thompson | f7d4994 | 2013-08-01 16:47:40 -0700 | [diff] [blame] | 101 | |
| 102 | #endif // BOOST_TT_IS_SAME_HPP_INCLUDED |
| 103 | |