boost/type_traits/intrinsics.hpp
// (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
// 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_INTRINSICS_HPP_INCLUDED
#define BOOST_TT_INTRINSICS_HPP_INCLUDED
#ifndef BOOST_TT_CONFIG_HPP_INCLUDED
#include "boost/type_traits/config.hpp"
#endif
//
// Helper macros for builtin compiler support.
// If your compiler has builtin support for any of the following
// traits concepts, then redefine the appropriate macros to pick
// up on the compiler support:
//
// (these should largely ignore cv-qualifiers)
// BOOST_IS_UNION(T) should evaluate to true if T is a union type
// BOOST_IS_POD(T) should evaluate to true if T is a POD type
// BOOST_IS_EMPTY(T) should evaluate to true if T is an empty struct or union
// BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) should evaluate to true if "T x;" has no effect
// BOOST_HAS_TRIVIAL_COPY(T) should evaluate to true if T(t) <==> memcpy
// BOOST_HAS_TRIVIAL_ASSIGN(T) should evaluate to true if t = u <==> memcpy
// BOOST_HAS_TRIVIAL_DESTRUCTOR(T) should evaluate to true if ~T() has no effect
#ifdef BOOST_HAS_SGI_TYPE_TRAITS
// Hook into SGI's __type_traits class, this will pick up user supplied
// specializations as well as SGI - compiler supplied specializations.
# include "boost/type_traits/is_same.hpp"
# include <type_traits.h>
# define BOOST_IS_POD(T) ::boost::is_same< typename ::__type_traits<T>::is_POD_type, ::__true_type>::value
# define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) ::boost::is_same< typename ::__type_traits<T>::has_trivial_default_constructor, ::__true_type>::value
# define BOOST_HAS_TRIVIAL_COPY(T) ::boost::is_same< typename ::__type_traits<T>::has_trivial_copy_constructor, ::__true_type>::value
# define BOOST_HAS_TRIVIAL_ASSIGN(T) ::boost::is_same< typename ::__type_traits<T>::has_trivial_assignment_operator, ::__true_type>::value
# define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) ::boost::is_same< typename ::__type_traits<T>::has_trivial_destructor, ::__true_type>::value
# ifdef __sgi
# define BOOST_HAS_TYPE_TRAITS_INTRINSICS
# endif
#endif
#if defined(__MSL_CPP__) && (__MSL_CPP__ >= 0x8000)
// Metrowerks compiler is acquiring intrinsic type traits support
// post version 8. We hook into the published interface to pick up
// user defined specializations as well as compiler intrinsics as
// and when they become available:
# include <msl_utility>
# define BOOST_IS_UNION(T) BOOST_STD_EXTENSION_NAMESPACE::is_union<T>::value
# define BOOST_IS_POD(T) BOOST_STD_EXTENSION_NAMESPACE::is_POD<T>::value
# define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) BOOST_STD_EXTENSION_NAMESPACE::has_trivial_default_ctor<T>::value
# define BOOST_HAS_TRIVIAL_COPY(T) BOOST_STD_EXTENSION_NAMESPACE::has_trivial_copy_ctor<T>::value
# define BOOST_HAS_TRIVIAL_ASSIGN(T) BOOST_STD_EXTENSION_NAMESPACE::has_trivial_assignment<T>::value
# define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) BOOST_STD_EXTENSION_NAMESPACE::has_trivial_dtor<T>::value
# define BOOST_HAS_TYPE_TRAITS_INTRINSICS
#endif
#ifndef BOOST_IS_UNION
# define BOOST_IS_UNION(T) false
#endif
#ifndef BOOST_IS_POD
# define BOOST_IS_POD(T) false
#endif
#ifndef BOOST_IS_EMPTY
# define BOOST_IS_EMPTY(T) false
#endif
#ifndef BOOST_HAS_TRIVIAL_CONSTRUCTOR
# define BOOST_HAS_TRIVIAL_CONSTRUCTOR(T) false
#endif
#ifndef BOOST_HAS_TRIVIAL_COPY
# define BOOST_HAS_TRIVIAL_COPY(T) false
#endif
#ifndef BOOST_HAS_TRIVIAL_ASSIGN
# define BOOST_HAS_TRIVIAL_ASSIGN(T) false
#endif
#ifndef BOOST_HAS_TRIVIAL_DESTRUCTOR
# define BOOST_HAS_TRIVIAL_DESTRUCTOR(T) false
#endif
#endif // BOOST_TT_INTRINSICS_HPP_INCLUDED