ceph/src/boost/libs/bimap/include/boost/bimap/detail/modifier_adaptor.hpp

   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 detail/modifier_adaptor.hpp
  10 /// \brief A binary to unary functor relation modifier adaptor.
  11
  12 #ifndef BOOST_BIMAP_DETAIL_MODIFIER_ADAPTOR_HPP
  13 #define BOOST_BIMAP_DETAIL_MODIFIER_ADAPTOR_HPP
  14
  15 #if defined(_MSC_VER)
  16 #pragma once
  17 #endif
  18
  19 #include <boost/config.hpp>
  20
  21 #include <functional>
  22
  23 namespace boost {
  24 namespace bimaps {
  25 namespace detail {
  26
  27 /// \brief A binary to unary functor relation modifier adaptor.
  28
  29 template
  30 <
  31     class Modifier,
  32     class NewArgument,
  33     class FirstExtractor,
  34     class SecondExtractor
  35 >
  36 struct relation_modifier_adaptor :
  37     public std::unary_function<NewArgument,bool>,
  38     Modifier,
  39     FirstExtractor,
  40     SecondExtractor
  41 {
  42     relation_modifier_adaptor( const Modifier & m ) : Modifier(m) {}
  43     relation_modifier_adaptor( const Modifier & m,
  44                                const FirstExtractor & fe,
  45                                const SecondExtractor & se ) :
  46         Modifier(m), FirstExtractor(fe), SecondExtractor(se) {}
  47
  48     void operator()( NewArgument & x ) const
  49     {
  50         Modifier::operator()(
  51             FirstExtractor ::operator()( x ),
  52             SecondExtractor::operator()( x )
  53         );
  54     }
  55 };
  56
  57 /// \brief A simple unary modifier adaptor.
  58 // This modifier is equivalent to bind( Modifier, bind( Extractor, _1 ) )
  59 // It may be a good idea to start using Boost.Bind instead of it.
  60
  61 template
  62 <
  63     class Modifier,
  64     class NewArgument,
  65     class Extractor
  66 >
  67 struct unary_modifier_adaptor :
  68     public std::unary_function<NewArgument,bool>,
  69     Modifier,
  70     Extractor
  71 {
  72     unary_modifier_adaptor( const Modifier & m ) : Modifier(m) {}
  73     unary_modifier_adaptor( const Modifier & m,
  74                             const Extractor & fe) :
  75         Modifier(m), Extractor(fe) {}
  76
  77     void operator()( NewArgument & x ) const
  78     {
  79         Modifier::operator()( Extractor::operator()( x ) );
  80     }
  81 };
  82
  83
  84 } // namespace detail
  85 } // namespace bimap
  86 } // namespace boost
  87
  88
  89 #endif // BOOST_BIMAP_DETAIL_MODIFIER_ADAPTOR_HPP