1 

     2 //  (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, 

     3 //      Howard Hinnant and John Maddock 2000. 

     4 //  (C) Copyright Mat Marcus, Jesse Jones and Adobe Systems Inc 2001

     5 

     6 //  Use, modification and distribution are subject to the Boost Software License,

     7 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at

     8 //  http://www.boost.org/LICENSE_1_0.txt).

     9 //

    10 //  See http://www.boost.org/libs/type_traits for most recent version including documentation.

    11 

    12 //    Fixed is_pointer, is_reference, is_const, is_volatile, is_same, 

    13 //    is_member_pointer based on the Simulated Partial Specialization work 

    14 //    of Mat Marcus and Jesse Jones. See  http://opensource.adobe.com or 

    15 //    http://groups.yahoo.com/group/boost/message/5441 

    16 //    Some workarounds in here use ideas suggested from "Generic<Programming>: 

    17 //    Mappings between Types and Values" 

    18 //    by Andrei Alexandrescu (see http://www.cuj.com/experts/1810/alexandr.html).

    19 

    20 

    21 #ifndef BOOST_TT_IS_MEMBER_POINTER_HPP_INCLUDED

    22 #define BOOST_TT_IS_MEMBER_POINTER_HPP_INCLUDED

    23 

    24 #include <boost/type_traits/config.hpp>

    25 #include <boost/detail/workaround.hpp>

    26 

    27 #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !BOOST_WORKAROUND(__BORLANDC__, < 0x600)

    28 #   include <boost/type_traits/is_member_function_pointer.hpp>

    29 #else

    30 #   include <boost/type_traits/is_reference.hpp>

    31 #   include <boost/type_traits/is_array.hpp>

    32 #   include <boost/type_traits/detail/is_mem_fun_pointer_tester.hpp>

    33 #   include <boost/type_traits/detail/yes_no_type.hpp>

    34 #   include <boost/type_traits/detail/false_result.hpp>

    35 #   include <boost/type_traits/detail/ice_or.hpp>

    36 #endif

    37 

    38 // should be the last #include

    39 #include <boost/type_traits/detail/bool_trait_def.hpp>

    40 

    41 namespace boost {

    42 

    43 #if defined( __CODEGEARC__ )

    44 BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_member_pointer,T,__is_member_pointer(T))

    45 #elif BOOST_WORKAROUND(__BORLANDC__, < 0x600)

    46 BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_member_pointer,T,false)

    47 BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_2(typename T,typename U,is_member_pointer,U T::*,true)

    48 

    49 #elif !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)

    50 BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_member_pointer,T,::boost::is_member_function_pointer<T>::value)

    51 BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_2(typename T,typename U,is_member_pointer,U T::*,true)

    52 

    53 #if !BOOST_WORKAROUND(__MWERKS__,<=0x3003)

    54 BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_2(typename T,typename U,is_member_pointer,U T::*const,true)

    55 BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_2(typename T,typename U,is_member_pointer,U T::*volatile,true)

    56 BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_2(typename T,typename U,is_member_pointer,U T::*const volatile,true)

    57 #endif

    58 

    59 #else // no partial template specialization

    60 

    61 namespace detail {

    62 

    63 template <typename R, typename T>

    64 ::boost::type_traits::yes_type BOOST_TT_DECL is_member_pointer_tester(R T::*const volatile*);

    65 ::boost::type_traits::no_type BOOST_TT_DECL is_member_pointer_tester(...);

    66 

    67 template <bool>

    68 struct is_member_pointer_select

    69     : ::boost::type_traits::false_result

    70 {

    71 };

    72 

    73 template <>

    74 struct is_member_pointer_select<false>

    75 {

    76     template <typename T> struct result_

    77     {

    78         static T* make_t();

    79         BOOST_STATIC_CONSTANT(

    80             bool, value =

    81             (::boost::type_traits::ice_or<

    82                 (1 == sizeof(::boost::type_traits::is_mem_fun_pointer_tester(make_t()))),

    83                 (1 == sizeof(is_member_pointer_tester(make_t())))

    84             >::value) );

    85     };

    86 };

    87 

    88 template <typename T>

    89 struct is_member_pointer_impl

    90     : is_member_pointer_select<

    91           ::boost::type_traits::ice_or<

    92               ::boost::is_reference<T>::value

    93             , ::boost::is_array<T>::value

    94             >::value

    95         >::template result_<T>

    96 {

    97 };

    98 

    99 BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_member_pointer,void,false)

   100 #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS

   101 BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_member_pointer,void const,false)

   102 BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_member_pointer,void volatile,false)

   103 BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_member_pointer,void const volatile,false)

   104 #endif

   105 

   106 } // namespace detail

   107 

   108 BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_member_pointer,T,::boost::detail::is_member_pointer_impl<T>::value)

   109 

   110 #endif // __BORLANDC__

   111 

   112 } // namespace boost

   113 

   114 #include <boost/type_traits/detail/bool_trait_undef.hpp>

   115 

   116 #endif // BOOST_TT_IS_MEMBER_POINTER_HPP_INCLUDED