Chris@16: // Boost.Bimap
Chris@16: //
Chris@16: // Copyright (c) 2006-2007 Matias Capeletto
Chris@16: //
Chris@16: // Distributed under the Boost Software License, Version 1.0.
Chris@16: // (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: /// \file detail/modifier_adaptor.hpp
Chris@16: /// \brief A binary to unary functor relation modifier adaptor.
Chris@16: 
Chris@16: #ifndef BOOST_BIMAP_DETAIL_MODIFIER_ADAPTOR_HPP
Chris@16: #define BOOST_BIMAP_DETAIL_MODIFIER_ADAPTOR_HPP
Chris@16: 
Chris@101: #if defined(_MSC_VER)
Chris@16: #pragma once
Chris@16: #endif
Chris@16: 
Chris@16: #include <boost/config.hpp>
Chris@16: 
Chris@16: #include <functional>
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace bimaps {
Chris@16: namespace detail {
Chris@16: 
Chris@16: /// \brief A binary to unary functor relation modifier adaptor.
Chris@16: 
Chris@16: template
Chris@16: <
Chris@16:     class Modifier,
Chris@16:     class NewArgument,
Chris@16:     class FirstExtractor,
Chris@16:     class SecondExtractor 
Chris@16: >
Chris@16: struct relation_modifier_adaptor :
Chris@16:     public std::unary_function<NewArgument,bool>,
Chris@16:     Modifier,
Chris@16:     FirstExtractor,
Chris@16:     SecondExtractor
Chris@16: {
Chris@16:     relation_modifier_adaptor( const Modifier & m ) : Modifier(m) {}
Chris@16:     relation_modifier_adaptor( const Modifier & m,
Chris@16:                                const FirstExtractor & fe,
Chris@16:                                const SecondExtractor & se ) :
Chris@16:         Modifier(m), FirstExtractor(fe), SecondExtractor(se) {}
Chris@16: 
Chris@16:     void operator()( NewArgument & x ) const
Chris@16:     {
Chris@16:         Modifier::operator()(
Chris@16:             FirstExtractor ::operator()( x ),
Chris@16:             SecondExtractor::operator()( x )
Chris@16:         );
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: /// \brief A simple unary modifier adaptor.
Chris@16: // This modifier is equivalent to bind( Modifier, bind( Extractor, _1 ) )
Chris@16: // It may be a good idea to start using Boost.Bind instead of it.
Chris@16: 
Chris@16: template
Chris@16: <
Chris@16:     class Modifier,
Chris@16:     class NewArgument,
Chris@16:     class Extractor
Chris@16: >
Chris@16: struct unary_modifier_adaptor :
Chris@16:     public std::unary_function<NewArgument,bool>,
Chris@16:     Modifier,
Chris@16:     Extractor
Chris@16: {
Chris@16:     unary_modifier_adaptor( const Modifier & m ) : Modifier(m) {}
Chris@16:     unary_modifier_adaptor( const Modifier & m,
Chris@16:                             const Extractor & fe) :
Chris@16:         Modifier(m), Extractor(fe) {}
Chris@16: 
Chris@16:     void operator()( NewArgument & x ) const
Chris@16:     {
Chris@16:         Modifier::operator()( Extractor::operator()( x ) );
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: } // namespace detail
Chris@16: } // namespace bimap
Chris@16: } // namespace boost
Chris@16: 
Chris@16: 
Chris@16: #endif // BOOST_BIMAP_DETAIL_MODIFIER_ADAPTOR_HPP