Jeff Thompson | a28eed8 | 2013-08-22 16:21:10 -0700 | [diff] [blame] | 1 | // (C) Copyright Daniel Frey and Robert Ramey 2009. |
| 2 | // Use, modification and distribution are subject to the Boost Software License, |
| 3 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
| 4 | // http://www.boost.org/LICENSE_1_0.txt). |
| 5 | // |
| 6 | // See http://www.boost.org/libs/type_traits for most recent version including documentation. |
| 7 | |
| 8 | #ifndef BOOST_TT_IS_VIRTUAL_BASE_OF_HPP_INCLUDED |
| 9 | #define BOOST_TT_IS_VIRTUAL_BASE_OF_HPP_INCLUDED |
| 10 | |
| 11 | #include <ndnboost/type_traits/is_base_of.hpp> |
| 12 | #include <ndnboost/type_traits/is_same.hpp> |
| 13 | #include <ndnboost/mpl/and.hpp> |
| 14 | #include <ndnboost/mpl/not.hpp> |
| 15 | |
| 16 | // should be the last #include |
| 17 | #include <ndnboost/type_traits/detail/bool_trait_def.hpp> |
| 18 | |
| 19 | namespace ndnboost { |
| 20 | namespace detail { |
| 21 | |
| 22 | |
| 23 | #ifdef BOOST_MSVC |
| 24 | #pragma warning( push ) |
| 25 | #pragma warning( disable : 4584 4250) |
| 26 | #elif defined(__GNUC__) && (__GNUC__ >= 4) |
| 27 | #pragma GCC system_header |
| 28 | #endif |
| 29 | |
| 30 | template<typename Base, typename Derived, typename tag> |
| 31 | struct is_virtual_base_of_impl |
| 32 | { |
| 33 | BOOST_STATIC_CONSTANT(bool, value = false); |
| 34 | }; |
| 35 | |
| 36 | template<typename Base, typename Derived> |
| 37 | struct is_virtual_base_of_impl<Base, Derived, mpl::true_> |
| 38 | { |
| 39 | #ifdef __BORLANDC__ |
| 40 | struct boost_type_traits_internal_struct_X : public virtual Derived, public virtual Base |
| 41 | { |
| 42 | boost_type_traits_internal_struct_X(); |
| 43 | boost_type_traits_internal_struct_X(const boost_type_traits_internal_struct_X&); |
| 44 | boost_type_traits_internal_struct_X& operator=(const boost_type_traits_internal_struct_X&); |
| 45 | ~boost_type_traits_internal_struct_X()throw(); |
| 46 | }; |
| 47 | struct boost_type_traits_internal_struct_Y : public virtual Derived |
| 48 | { |
| 49 | boost_type_traits_internal_struct_Y(); |
| 50 | boost_type_traits_internal_struct_Y(const boost_type_traits_internal_struct_Y&); |
| 51 | boost_type_traits_internal_struct_Y& operator=(const boost_type_traits_internal_struct_Y&); |
| 52 | ~boost_type_traits_internal_struct_Y()throw(); |
| 53 | }; |
| 54 | #else |
| 55 | struct boost_type_traits_internal_struct_X : public Derived, virtual Base |
| 56 | { |
| 57 | boost_type_traits_internal_struct_X(); |
| 58 | boost_type_traits_internal_struct_X(const boost_type_traits_internal_struct_X&); |
| 59 | boost_type_traits_internal_struct_X& operator=(const boost_type_traits_internal_struct_X&); |
| 60 | ~boost_type_traits_internal_struct_X()throw(); |
| 61 | }; |
| 62 | struct boost_type_traits_internal_struct_Y : public Derived |
| 63 | { |
| 64 | boost_type_traits_internal_struct_Y(); |
| 65 | boost_type_traits_internal_struct_Y(const boost_type_traits_internal_struct_Y&); |
| 66 | boost_type_traits_internal_struct_Y& operator=(const boost_type_traits_internal_struct_Y&); |
| 67 | ~boost_type_traits_internal_struct_Y()throw(); |
| 68 | }; |
| 69 | #endif |
| 70 | BOOST_STATIC_CONSTANT(bool, value = (sizeof(boost_type_traits_internal_struct_X)==sizeof(boost_type_traits_internal_struct_Y))); |
| 71 | }; |
| 72 | |
| 73 | template<typename Base, typename Derived> |
| 74 | struct is_virtual_base_of_impl2 |
| 75 | { |
| 76 | typedef typename mpl::and_<is_base_of<Base, Derived>, mpl::not_<is_same<Base, Derived> > >::type tag_type; |
| 77 | typedef is_virtual_base_of_impl<Base, Derived, tag_type> imp; |
| 78 | BOOST_STATIC_CONSTANT(bool, value = imp::value); |
| 79 | }; |
| 80 | |
| 81 | #ifdef BOOST_MSVC |
| 82 | #pragma warning( pop ) |
| 83 | #endif |
| 84 | |
| 85 | } // namespace detail |
| 86 | |
| 87 | BOOST_TT_AUX_BOOL_TRAIT_DEF2( |
| 88 | is_virtual_base_of |
| 89 | , Base |
| 90 | , Derived |
| 91 | , (::ndnboost::detail::is_virtual_base_of_impl2<Base,Derived>::value) |
| 92 | ) |
| 93 | |
| 94 | #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
| 95 | BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_virtual_base_of,Base&,Derived,false) |
| 96 | BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_virtual_base_of,Base,Derived&,false) |
| 97 | BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC2_2(typename Base,typename Derived,is_virtual_base_of,Base&,Derived&,false) |
| 98 | #endif |
| 99 | |
| 100 | } // namespace ndnboost |
| 101 | |
| 102 | #include <ndnboost/type_traits/detail/bool_trait_undef.hpp> |
| 103 | |
| 104 | #endif |