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// (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes,
// Howard Hinnant and John Maddock 2000.
// (C) Copyright Mat Marcus, Jesse Jones and Adobe Systems Inc 2001
// Use, modification and distribution are subject to the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt).
//
// See http://www.boost.org/libs/type_traits for most recent version including documentation.
// Fixed is_pointer, is_reference, is_const, is_volatile, is_same,
// is_member_pointer based on the Simulated Partial Specialization work
// of Mat Marcus and Jesse Jones. See http://opensource.adobe.com or
// http://groups.yahoo.com/group/boost/message/5441
// Some workarounds in here use ideas suggested from "Generic<Programming>:
// Mappings between Types and Values"
// by Andrei Alexandrescu (see http://www.cuj.com/experts/1810/alexandr.html).
#ifndef BOOST_TT_IS_POINTER_HPP_INCLUDED
#define BOOST_TT_IS_POINTER_HPP_INCLUDED
#include <boost/type_traits/is_member_pointer.hpp>
#include <boost/type_traits/detail/ice_and.hpp>
#include <boost/type_traits/detail/ice_not.hpp>
#include <boost/type_traits/config.hpp>
#if !BOOST_WORKAROUND(BOOST_MSVC,<=1300)
#include <boost/type_traits/remove_cv.hpp>
#endif
#ifdef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
# include <boost/type_traits/is_reference.hpp>
# include <boost/type_traits/is_array.hpp>
# include <boost/type_traits/detail/is_function_ptr_tester.hpp>
# include <boost/type_traits/detail/false_result.hpp>
# include <boost/type_traits/detail/ice_or.hpp>
#endif
// should be the last #include
#include <boost/type_traits/detail/bool_trait_def.hpp>
namespace boost {
#if defined( __CODEGEARC__ )
BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_pointer,T,__is_pointer(T))
#elif !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
namespace detail {
template< typename T > struct is_pointer_helper
{
BOOST_STATIC_CONSTANT(bool, value = false);
};
# define TT_AUX_BOOL_TRAIT_HELPER_PARTIAL_SPEC(helper,sp,result) \
template< typename T > struct helper<sp> \
{ \
BOOST_STATIC_CONSTANT(bool, value = result); \
}; \
/**/
TT_AUX_BOOL_TRAIT_HELPER_PARTIAL_SPEC(is_pointer_helper,T*,true)
# undef TT_AUX_BOOL_TRAIT_HELPER_PARTIAL_SPEC
template< typename T >
struct is_pointer_impl
{
#if BOOST_WORKAROUND(BOOST_MSVC,<=1300)
BOOST_STATIC_CONSTANT(bool, value =
(::boost::type_traits::ice_and<
::boost::detail::is_pointer_helper<T>::value
, ::boost::type_traits::ice_not<
::boost::is_member_pointer<T>::value
>::value
>::value)
);
#else
BOOST_STATIC_CONSTANT(bool, value =
(::boost::type_traits::ice_and<
::boost::detail::is_pointer_helper<typename remove_cv<T>::type>::value
, ::boost::type_traits::ice_not<
::boost::is_member_pointer<T>::value
>::value
>::value)
);
#endif
};
} // namespace detail
BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_pointer,T,::boost::detail::is_pointer_impl<T>::value)
#if defined(__BORLANDC__) && !defined(__COMO__) && (__BORLANDC__ < 0x600)
BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_pointer,T&,false)
BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_pointer,T& const,false)
BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_pointer,T& volatile,false)
BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_pointer,T& const volatile,false)
#endif
#else // no partial template specialization
namespace detail {
struct pointer_helper
{
pointer_helper(const volatile void*);
};
yes_type BOOST_TT_DECL is_pointer_tester(pointer_helper);
no_type BOOST_TT_DECL is_pointer_tester(...);
template <bool>
struct is_pointer_select
: ::boost::type_traits::false_result
{
};
template <>
struct is_pointer_select<false>
{
template <typename T> struct result_
{
static T& make_t();
BOOST_STATIC_CONSTANT(bool, value =
(::boost::type_traits::ice_or<
(1 == sizeof(is_pointer_tester(make_t()))),
(1 == sizeof(type_traits::is_function_ptr_tester(make_t())))
>::value));
};
};
template <typename T>
struct is_pointer_impl
: is_pointer_select<
::boost::type_traits::ice_or<
::boost::is_reference<T>::value
, ::boost::is_array<T>::value
>::value
>::template result_<T>
{
};
BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pointer,void,false)
#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pointer,void const,false)
BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pointer,void volatile,false)
BOOST_TT_AUX_BOOL_TRAIT_IMPL_SPEC1(is_pointer,void const volatile,false)
#endif
} // namespace detail
BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_pointer,T,::boost::detail::is_pointer_impl<T>::value)
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
} // namespace boost
#include <boost/type_traits/detail/bool_trait_undef.hpp>
#endif // BOOST_TT_IS_POINTER_HPP_INCLUDED
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