boost/assign/ptr_map_inserter.hpp

0001 // Boost.Assign library
0002 //
0003 //  Copyright Thorsten Ottosen 2006. Use, modification and
0004 //  distribution is subject to the Boost Software License, Version
0005 //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
0006 //  http://www.boost.org/LICENSE_1_0.txt)
0007 //
0008 // For more information, see http://www.boost.org/libs/assign/
0009 //
0010
0011 #ifndef BOOST_ASSIGN_PTR_CONTAINER_PTR_MAP_INSERTER_HPP
0012 #define BOOST_ASSIGN_PTR_CONTAINER_PTR_MAP_INSERTER_HPP
0013
0014 #if defined(_MSC_VER)
0015 # pragma once
0016 #endif
0017
0018 #include <boost/assign/list_inserter.hpp>
0019 #include <boost/type_traits/remove_reference.hpp>
0020 #include <boost/type_traits/remove_pointer.hpp>
0021 #include <boost/move/utility.hpp>
0022
0023 #if defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) || defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
0024
0025 #include <boost/preprocessor/repetition/enum_binary_params.hpp>
0026 #include <boost/preprocessor/repetition/enum_params.hpp>
0027 #include <boost/preprocessor/iteration/local.hpp>
0028
0029 #endif
0030
0031 namespace boost
0032 {
0033
0034 namespace assign
0035 {
0036     template< class PtrMap, class Obj >
0037     class ptr_map_inserter
0038     {
0039         typedef BOOST_DEDUCED_TYPENAME
0040                 remove_pointer< BOOST_DEDUCED_TYPENAME
0041                        remove_reference<Obj>::type >::type
0042            obj_type;
0043         typedef BOOST_DEDUCED_TYPENAME PtrMap::key_type
0044            key_type;
0045
0046     public:
0047
0048         ptr_map_inserter( PtrMap& m ) : m_( m )
0049         {}
0050
0051 #if defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) || defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
0052
0053         template< class Key >
0054         ptr_map_inserter& operator()( const Key& t )
0055         {
0056             key_type k(t);
0057             m_.insert( k, new obj_type );
0058             return *this;
0059         }
0060
0061 #ifndef BOOST_ASSIGN_MAX_PARAMS // use user's value
0062 #define BOOST_ASSIGN_MAX_PARAMS 6
0063 #endif
0064 #define BOOST_ASSIGN_MAX_PARAMETERS (BOOST_ASSIGN_MAX_PARAMS - 1)
0065 #define BOOST_ASSIGN_PARAMS1(n) BOOST_PP_ENUM_PARAMS(n, class T)
0066 #define BOOST_ASSIGN_PARAMS2(n) BOOST_PP_ENUM_BINARY_PARAMS(n, T, const& t)
0067 #define BOOST_ASSIGN_PARAMS3(n) BOOST_PP_ENUM_PARAMS(n, t)
0068
0069 #define BOOST_PP_LOCAL_LIMITS (1, BOOST_ASSIGN_MAX_PARAMETERS)
0070 #define BOOST_PP_LOCAL_MACRO(n) \
0071     template< class T, BOOST_ASSIGN_PARAMS1(n) > \
0072     ptr_map_inserter& operator()( const T& t, BOOST_ASSIGN_PARAMS2(n) ) \
0073     { \
0074         key_type k(t); \
0075         m_.insert( k, new obj_type( BOOST_ASSIGN_PARAMS3(n) ) ); \
0076         return *this; \
0077     } \
0078     /**/
0079
0080 #include BOOST_PP_LOCAL_ITERATE()
0081
0082 #else
0083     template< class Key, class... Ts >
0084     ptr_map_inserter& operator()(Key&& k, Ts&&... ts)
0085     {
0086         key_type key(boost::forward<Key>(k));
0087         m_.insert(key, new obj_type(boost::forward<Ts>(ts)...));
0088         return *this;
0089     }
0090
0091 #endif
0092     private:
0093
0094         ptr_map_inserter& operator=( const ptr_map_inserter& );
0095         PtrMap& m_;
0096     };
0097
0098     template< class PtrMap >
0099     inline ptr_map_inserter< PtrMap, typename PtrMap::mapped_reference >
0100     ptr_map_insert( PtrMap& m )
0101     {
0102         return ptr_map_inserter< PtrMap, typename PtrMap::mapped_reference >( m );
0103     }
0104
0105 #ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
0106
0107     template< class T, class PtrMap >
0108     inline ptr_map_inserter< PtrMap, T >
0109     ptr_map_insert( PtrMap& m )
0110     {
0111         return ptr_map_inserter< PtrMap, T >( m );
0112     }
0113
0114 #endif
0115
0116 } // namespace 'assign'
0117 } // namespace 'boost'
0118
0119 #if defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) || defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
0120
0121 #undef BOOST_ASSIGN_PARAMS1
0122 #undef BOOST_ASSIGN_PARAMS2
0123 #undef BOOST_ASSIGN_PARAMS3
0124 #undef BOOST_ASSIGN_MAX_PARAMETERS
0125
0126 #endif
0127
0128 #endif