1 // Boost.Bimap 2 // 3 // Copyright (c) 2006-2007 Matias Capeletto 4 // 5 // Distributed under the Boost Software License, Version 1.0. 6 // (See accompanying file LICENSE_1_0.txt or copy at 7 // http://www.boost.org/LICENSE_1_0.txt) 8 9 /// \file relation/detail/metadata_access_builder.hpp 10 /// \brief Define macros to help building metafunctions 11 12 #ifndef BOOST_BIMAP_RELATION_DETAIL_METADATA_ACCESS_BUILDER_HPP 13 #define BOOST_BIMAP_RELATION_DETAIL_METADATA_ACCESS_BUILDER_HPP 14 15 #if defined(_MSC_VER) 16 #pragma once 17 #endif 18 19 #include <boost/config.hpp> 20 21 #include <boost/bimap/relation/support/is_tag_of_member_at.hpp> 22 #include <boost/bimap/detail/debug/static_error.hpp> 23 #include <boost/utility/enable_if.hpp> 24 #include <boost/preprocessor/cat.hpp> 25 26 27 28 /****************************************************************************** 29 BIMAP SYMMETRIC METADATA ACCESS INTERFACE 30 ******************************************************************************* 31 32 template< class Tag, class SymmetricType > 33 struct NAME 34 { 35 typedef -unspecified- type; 36 }; 37 38 ******************************************************************************/ 39 40 41 /*===========================================================================*/ 42 #define BOOST_BIMAP_SYMMETRIC_METADATA_ACCESS_BUILDER( \ 43 \ 44 NAME, \ 45 METADATA_BY_LEFT, \ 46 METADATA_BY_RIGHT \ 47 ) \ 48 \ 49 template \ 50 < \ 51 class Tag, \ 52 class SymmetricType, \ 53 class Enable = void \ 54 > \ 55 struct NAME \ 56 { \ 57 BOOST_BIMAP_STATIC_ERROR( \ 58 BOOST_PP_CAT(NAME,_FAILURE), \ 59 (SymmetricType,Tag) \ 60 ); \ 61 }; \ 62 \ 63 template< class Tag, class SymmetricType > \ 64 struct NAME \ 65 < \ 66 Tag, SymmetricType, \ 67 BOOST_DEDUCED_TYPENAME enable_if \ 68 < \ 69 ::boost::bimaps::relation::support::is_tag_of_member_at_left \ 70 < \ 71 Tag, \ 72 SymmetricType \ 73 > \ 74 \ 75 >::type \ 76 > \ 77 { \ 78 typedef BOOST_DEDUCED_TYPENAME SymmetricType::METADATA_BY_LEFT type; \ 79 }; \ 80 \ 81 template< class Tag, class SymmetricType > \ 82 struct NAME \ 83 < \ 84 Tag, SymmetricType, \ 85 BOOST_DEDUCED_TYPENAME enable_if \ 86 < \ 87 ::boost::bimaps::relation::support::is_tag_of_member_at_right \ 88 < \ 89 Tag, \ 90 SymmetricType \ 91 > \ 92 \ 93 >::type \ 94 > \ 95 { \ 96 typedef BOOST_DEDUCED_TYPENAME SymmetricType::METADATA_BY_RIGHT type; \ 97 }; 98 /*===========================================================================*/ 99 100 101 #endif // BOOST_BIMAP_RELATION_DETAIL_METADATA_ACCES_BUILDER_HPP 102 103 104