boost/boost/type_traits/is_member_pointer.hpp

   1
   2 // (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, Howard
   3 // Hinnant & John Maddock 2000.  Permission to copy, use, modify,
   4 // sell and distribute this software is granted provided this
   5 // copyright notice appears in all copies. This software is provided
   6 // "as is" without express or implied warranty, and with no claim as
   7 // to its suitability for any purpose.
   8 //
   9 // See http://www.boost.org for most recent version including documentation.
  10
  11 #ifndef BOOST_TT_IS_MEMBER_POINTER_HPP_INCLUDED
  12 #define BOOST_TT_IS_MEMBER_POINTER_HPP_INCLUDED
  13
  14 #include "boost/type_traits/config.hpp"
  15
  16 #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !defined(__BORLANDC__)
  17 #   include "boost/type_traits/is_member_function_pointer.hpp"
  18 #else
  19 #   include "boost/type_traits/is_reference.hpp"
  20 #   include "boost/type_traits/is_array.hpp"
  21 #   include "boost/type_traits/detail/is_mem_fun_pointer_tester.hpp"
  22 #   include "boost/type_traits/detail/yes_no_type.hpp"
  23 #   include "boost/type_traits/detail/false_result.hpp"
  24 #   include "boost/type_traits/detail/ice_or.hpp"
  25 #endif
  26
  27 // should be the last #include
  28 #include "boost/type_traits/detail/bool_trait_def.hpp"
  29
  30 namespace boost {
  31
  32 #if defined(__BORLANDC__)
  33 BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_member_pointer,T,false)
  34 BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_2(typename T,typename U,is_member_pointer,U T::*,true)
  35
  36 #elif !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
  37 BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_member_pointer,T,::boost::is_member_function_pointer<T>::value)
  38 BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_2(typename T,typename U,is_member_pointer,U T::*,true)
  39
  40 #else // no partial template specialization
  41
  42 namespace detail {
  43
  44 template <typename R, typename T>
  45 ::boost::type_traits::yes_type BOOST_TT_DECL is_member_pointer_tester(R T::*);
  46 ::boost::type_traits::no_type BOOST_TT_DECL is_member_pointer_tester(...);
  47
  48 template <bool>
  49 struct is_member_pointer_select
  50     : ::boost::type_traits::false_result
  51 {
  52 };
  53
  54 template <>
  55 struct is_member_pointer_select<false>
  56 {
  57     template <typename T> struct result_
  58     {
  59         static T& make_t();
  60         BOOST_STATIC_CONSTANT(
  61             bool, value =
  62             (::boost::type_traits::ice_or<
  63                 (1 == sizeof(::boost::type_traits::is_mem_fun_pointer_tester(make_t()))),
  64                 (1 == sizeof(is_member_pointer_tester(make_t())))
  65             >::value) );
  66     };
  67 };
  68
  69 template <typename T>
  70 struct is_member_pointer_impl
  71     : is_member_pointer_select<
  72           ::boost::type_traits::ice_or<
  73               ::boost::is_reference<T>::value
  74             , ::boost::is_array<T>::value
  75             >::value
  76         >::template result_<T>
  77 {
  78 };
  79
  80 BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_member_pointer,void,false)
  81 #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
  82 BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_member_pointer,void const,false)
  83 BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_member_pointer,void volatile,false)
  84 BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_member_pointer,void const volatile,false)
  85 #endif
  86
  87 } // namespace detail
  88
  89 BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_member_pointer,T,::boost::detail::is_member_pointer_impl<T>::value)
  90
  91 #endif // __BORLANDC__
  92
  93 } // namespace boost
  94
  95 #include "boost/type_traits/detail/bool_trait_undef.hpp"
  96
  97 #endif // BOOST_TT_IS_MEMBER_POINTER_HPP_INCLUDED