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include/boost/container/detail/function_detector.hpp  view on Meta::CPAN

#ifndef BOOST_CONTAINER_DETAIL_FUNCTION_DETECTOR_HPP
#define BOOST_CONTAINER_DETAIL_FUNCTION_DETECTOR_HPP

#ifndef BOOST_CONFIG_HPP
#  include <boost/config.hpp>
#endif

#if defined(BOOST_HAS_PRAGMA_ONCE)
#  pragma once
#endif

#include <boost/container/detail/config_begin.hpp>

namespace boost {
namespace container {
namespace function_detector {

    typedef char NotFoundType;
    struct StaticFunctionType { NotFoundType x [2]; };
    struct NonStaticFunctionType { NotFoundType x [3]; };

    enum
         { NotFound          = 0,
           StaticFunction    = sizeof( StaticFunctionType )    - sizeof( NotFoundType ),
           NonStaticFunction = sizeof( NonStaticFunctionType ) - sizeof( NotFoundType )
         };

}  //namespace boost {
}  //namespace container {
}  //namespace function_detector {

#define BOOST_CONTAINER_CREATE_FUNCTION_DETECTOR(Identifier, InstantiationKey) \
   namespace boost { \
   namespace container { \
   namespace function_detector { \
   template < class T, \
            class NonStaticType, \
            class NonStaticConstType, \
            class StaticType > \
   class DetectMember_##InstantiationKey_##Identifier { \
      template < NonStaticType > \
      struct TestNonStaticNonConst ; \
      \
      template < NonStaticConstType > \
      struct TestNonStaticConst ; \
      \
      template < StaticType > \
      struct TestStatic ; \
      \
      template <class U > \
      static NonStaticFunctionType Test( TestNonStaticNonConst<&U::Identifier>*, int ); \
      \
      template <class U > \
      static NonStaticFunctionType Test( TestNonStaticConst<&U::Identifier>*, int ); \
      \
      template <class U> \
      static StaticFunctionType Test( TestStatic<&U::Identifier>*, int ); \
      \
      template <class U> \
      static NotFoundType Test( ... ); \
   public : \
      static const int check = NotFound + (sizeof(Test<T>(0, 0)) - sizeof(NotFoundType));\
   };\
}}} //namespace boost::container::function_detector {

#define BOOST_CONTAINER_DETECT_FUNCTION(Class, InstantiationKey, ReturnType, Identifier, Params) \
    ::boost::container::function_detector::DetectMember_##InstantiationKey_##Identifier< Class,\
                                         ReturnType (Class::*)Params,\
                                         ReturnType (Class::*)Params const,\
                                         ReturnType (*)Params \
                                       >::check

#include <boost/container/detail/config_end.hpp>

#endif   //@ifndef BOOST_CONTAINER_DETAIL_FUNCTION_DETECTOR_HPP