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// (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, Howard
// Hinnant & John Maddock 2000-2003.
// 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.
#ifndef BOOST_TT_IS_CLASS_HPP_INCLUDED
#define BOOST_TT_IS_CLASS_HPP_INCLUDED
#include <boost/type_traits/config.hpp>
#include <boost/type_traits/intrinsics.hpp>
#ifndef BOOST_IS_CLASS
# include <boost/type_traits/is_union.hpp>
# include <boost/type_traits/detail/ice_and.hpp>
# include <boost/type_traits/detail/ice_not.hpp>
#ifdef BOOST_TT_HAS_CONFORMING_IS_CLASS_IMPLEMENTATION
# include <boost/type_traits/detail/yes_no_type.hpp>
#else
# include <boost/type_traits/is_scalar.hpp>
# include <boost/type_traits/is_array.hpp>
# include <boost/type_traits/is_reference.hpp>
# include <boost/type_traits/is_void.hpp>
# include <boost/type_traits/is_function.hpp>
#endif
#endif // BOOST_IS_CLASS
#ifdef __EDG_VERSION__
# include <boost/type_traits/remove_cv.hpp>
#endif
// should be the last #include
#include <boost/type_traits/detail/bool_trait_def.hpp>
namespace boost {
namespace detail {
#ifndef BOOST_IS_CLASS
#ifdef BOOST_TT_HAS_CONFORMING_IS_CLASS_IMPLEMENTATION
// This is actually the conforming implementation which works with
// abstract classes. However, enough compilers have trouble with
// it that most will use the one in
// boost/type_traits/object_traits.hpp. This implementation
// actually works with VC7.0, but other interactions seem to fail
// when we use it.
// is_class<> metafunction due to Paul Mensonides
// (leavings@attbi.com). For more details:
// http://groups.google.com/groups?hl=en&selm=000001c1cc83%24e154d5e0%247772e50c%40c161550a&rnum=1
#if defined(__GNUC__) && !defined(__EDG_VERSION__)
template <class U> ::boost::type_traits::yes_type is_class_tester(void(U::*)(void));
template <class U> ::boost::type_traits::no_type is_class_tester(...);
template <typename T>
struct is_class_impl
{
BOOST_STATIC_CONSTANT(bool, value =
(::boost::type_traits::ice_and<
sizeof(is_class_tester<T>(0)) == sizeof(::boost::type_traits::yes_type),
::boost::type_traits::ice_not< ::boost::is_union<T>::value >::value
>::value)
);
};
#else
template <typename T>
struct is_class_impl
{
template <class U> static ::boost::type_traits::yes_type is_class_tester(void(U::*)(void));
template <class U> static ::boost::type_traits::no_type is_class_tester(...);
BOOST_STATIC_CONSTANT(bool, value =
(::boost::type_traits::ice_and<
sizeof(is_class_tester<T>(0)) == sizeof(::boost::type_traits::yes_type),
::boost::type_traits::ice_not< ::boost::is_union<T>::value >::value
>::value)
);
};
#endif
#else
template <typename T>
struct is_class_impl
{
# ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
BOOST_STATIC_CONSTANT(bool, value =
(::boost::type_traits::ice_and<
::boost::type_traits::ice_not< ::boost::is_union<T>::value >::value,
::boost::type_traits::ice_not< ::boost::is_scalar<T>::value >::value,
::boost::type_traits::ice_not< ::boost::is_array<T>::value >::value,
::boost::type_traits::ice_not< ::boost::is_reference<T>::value>::value,
::boost::type_traits::ice_not< ::boost::is_void<T>::value >::value,
::boost::type_traits::ice_not< ::boost::is_function<T>::value >::value
>::value));
# else
BOOST_STATIC_CONSTANT(bool, value =
(::boost::type_traits::ice_and<
::boost::type_traits::ice_not< ::boost::is_union<T>::value >::value,
::boost::type_traits::ice_not< ::boost::is_scalar<T>::value >::value,
::boost::type_traits::ice_not< ::boost::is_array<T>::value >::value,
::boost::type_traits::ice_not< ::boost::is_reference<T>::value>::value,
::boost::type_traits::ice_not< ::boost::is_void<T>::value >::value
>::value));
# endif
};
# endif // BOOST_TT_HAS_CONFORMING_IS_CLASS_IMPLEMENTATION
# else // BOOST_IS_CLASS
template <typename T>
struct is_class_impl
{
BOOST_STATIC_CONSTANT(bool, value = BOOST_IS_CLASS(T));
};
# endif // BOOST_IS_CLASS
} // namespace detail
# ifdef __EDG_VERSION__
BOOST_TT_AUX_BOOL_TRAIT_DEF1(
is_class,T, boost::detail::is_class_impl<typename boost::remove_cv<T>::type>::value)
# else
BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_class,T,::boost::detail::is_class_impl<T>::value)
# endif
} // namespace boost
#include <boost/type_traits/detail/bool_trait_undef.hpp>
#endif // BOOST_TT_IS_CLASS_HPP_INCLUDED
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