115 lines
3.6 KiB
Plaintext
115 lines
3.6 KiB
Plaintext
|
// (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/detail/config.hpp>
|
||
|
|
#include <boost/type_traits/intrinsics.hpp>
|
||
|
|
#include <boost/type_traits/integral_constant.hpp>
|
||
|
|
#ifndef BOOST_IS_CLASS
|
||
|
|
# include <boost/type_traits/is_union.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
|
||
|
|
|
||
|
|
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 =
|
||
|
|
sizeof(is_class_tester<T>(0)) == sizeof(::boost::type_traits::yes_type)
|
||
|
|
&& ! ::boost::is_union<T>::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 =
|
||
|
|
sizeof(is_class_tester<T>(0)) == sizeof(::boost::type_traits::yes_type)
|
||
|
|
&& ! ::boost::is_union<T>::value
|
||
|
|
);
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
struct is_class_impl
|
||
|
|
{
|
||
|
|
BOOST_STATIC_CONSTANT(bool, value =
|
||
|
|
! ::boost::is_union<T>::value >::value
|
||
|
|
&& ! ::boost::is_scalar<T>::value
|
||
|
|
&& ! ::boost::is_array<T>::value
|
||
|
|
&& ! ::boost::is_reference<T>::value
|
||
|
|
&& ! ::boost::is_void<T>::value
|
||
|
|
&& ! ::boost::is_function<T>::value
|
||
|
|
);
|
||
|
|
};
|
||
|
|
|
||
|
|
# 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
|
||
|
|
|
||
|
|
template <class T> struct is_class : public integral_constant<bool, ::boost::detail::is_class_impl<T>::value> {};
|
||
|
|
# ifdef __EDG_VERSION__
|
||
|
|
template <class T> struct is_class<const T> : public is_class<T>{};
|
||
|
|
template <class T> struct is_class<const volatile T> : public is_class<T>{};
|
||
|
|
template <class T> struct is_class<volatile T> : public is_class<T>{};
|
||
|
|
# endif
|
||
|
|
|
||
|
|
} // namespace boost
|
||
|
|
|
||
|
|
#endif // BOOST_TT_IS_CLASS_HPP_INCLUDED
|