ceph/src/boost/boost/intrusive/detail/function_detector.hpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 //
   3 // (C) Copyright Ion Gaztanaga  2009-2013.
   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 // See http://www.boost.org/libs/intrusive for documentation.
  10 //
  11 /////////////////////////////////////////////////////////////////////////////
  12 //  This code was modified from the code posted by Alexandre Courpron in his
  13 //  article "Interface Detection" in The Code Project:
  14 //  http://www.codeproject.com/KB/architecture/Detector.aspx
  15 ///////////////////////////////////////////////////////////////////////////////
  16 // Copyright 2007 Alexandre Courpron
  17 //
  18 // Permission to use, copy, modify, redistribute and sell this software,
  19 // provided that this copyright notice appears on all copies of the software.
  20 ///////////////////////////////////////////////////////////////////////////////
  21
  22 #ifndef BOOST_INTRUSIVE_DETAIL_FUNCTION_DETECTOR_HPP
  23 #define BOOST_INTRUSIVE_DETAIL_FUNCTION_DETECTOR_HPP
  24
  25 #ifndef BOOST_CONFIG_HPP
  26 #  include <boost/config.hpp>
  27 #endif
  28
  29 #if defined(BOOST_HAS_PRAGMA_ONCE)
  30 #  pragma once
  31 #endif
  32
  33 namespace boost {
  34 namespace intrusive {
  35 namespace function_detector {
  36
  37     typedef char NotFoundType;
  38     struct StaticFunctionType { NotFoundType x [2]; };
  39     struct NonStaticFunctionType { NotFoundType x [3]; };
  40
  41     enum
  42          { NotFound          = 0,
  43            StaticFunction    = sizeof( StaticFunctionType )    - sizeof( NotFoundType ),
  44            NonStaticFunction = sizeof( NonStaticFunctionType ) - sizeof( NotFoundType )
  45          };
  46
  47 }  //namespace boost {
  48 }  //namespace intrusive {
  49 }  //namespace function_detector {
  50
  51 #define BOOST_INTRUSIVE_CREATE_FUNCTION_DETECTOR(Identifier, InstantiationKey) \
  52    namespace boost { \
  53    namespace intrusive { \
  54    namespace function_detector { \
  55    template < class T, \
  56             class NonStaticType, \
  57             class NonStaticConstType, \
  58             class StaticType > \
  59    class DetectMember_##InstantiationKey_##Identifier { \
  60       template < NonStaticType > \
  61       struct TestNonStaticNonConst ; \
  62       \
  63       template < NonStaticConstType > \
  64       struct TestNonStaticConst ; \
  65       \
  66       template < StaticType > \
  67       struct TestStatic ; \
  68       \
  69       template <class U > \
  70       static NonStaticFunctionType Test( TestNonStaticNonConst<&U::Identifier>*, int ); \
  71       \
  72       template <class U > \
  73       static NonStaticFunctionType Test( TestNonStaticConst<&U::Identifier>*, int ); \
  74       \
  75       template <class U> \
  76       static StaticFunctionType Test( TestStatic<&U::Identifier>*, int ); \
  77       \
  78       template <class U> \
  79       static NotFoundType Test( ... ); \
  80    public : \
  81       static const int check = NotFound + (sizeof(Test<T>(0, 0)) - sizeof(NotFoundType));\
  82    };\
  83 }}} //namespace boost::intrusive::function_detector {
  84
  85 #define BOOST_INTRUSIVE_DETECT_FUNCTION(Class, InstantiationKey, ReturnType, Identifier, Params) \
  86     ::boost::intrusive::function_detector::DetectMember_##InstantiationKey_##Identifier< Class,\
  87                                          ReturnType (Class::*)Params,\
  88                                          ReturnType (Class::*)Params const,\
  89                                          ReturnType (*)Params \
  90                                        >::check
  91
  92 #endif   //@ifndef BOOST_INTRUSIVE_DETAIL_FUNCTION_DETECTOR_HPP