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#ifndef BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED
#define BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED
// Copyright Aleksey Gurtovoy 2002-2004
//
// Distributed under 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/mpl for documentation.
// $Id$
// $Date$
// $Revision$
#include <boost/mpl/not.hpp>
#include <boost/mpl/and.hpp>
#include <boost/mpl/begin_end.hpp>
#include <boost/mpl/if.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/mpl/sequence_tag_fwd.hpp>
#include <boost/mpl/identity.hpp>
#include <boost/mpl/void.hpp>
#include <boost/mpl/aux_/has_tag.hpp>
#include <boost/mpl/aux_/has_begin.hpp>
#include <boost/mpl/aux_/na_spec.hpp>
#include <boost/mpl/aux_/lambda_support.hpp>
#include <boost/mpl/aux_/config/eti.hpp>
#include <boost/mpl/aux_/config/msvc.hpp>
#include <boost/mpl/aux_/config/workaround.hpp>
#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
# include <boost/mpl/aux_/msvc_is_class.hpp>
#elif BOOST_WORKAROUND(BOOST_MSVC, == 1300)
# include <boost/type_traits/is_class.hpp>
#endif
#include <boost/type_traits/is_same.hpp>
namespace boost { namespace mpl {
#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
namespace aux {
// agurt, 11/jun/03:
// MSVC 6.5/7.0 fails if 'has_begin' is instantiated on a class type that has a
// 'begin' member that doesn't name a type; e.g. 'has_begin< std::vector<int> >'
// would fail; requiring 'T' to have _both_ 'tag' and 'begin' members workarounds
// the issue for most real-world cases
template< typename T > struct is_sequence_impl
: and_<
identity< aux::has_tag<T> >
, identity< aux::has_begin<T> >
>
{
};
} // namespace aux
template<
typename BOOST_MPL_AUX_NA_PARAM(T)
>
struct is_sequence
: if_<
#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
aux::msvc_is_class<T>
#else
boost::is_class<T>
#endif
, aux::is_sequence_impl<T>
, bool_<false>
>::type
{
BOOST_MPL_AUX_LAMBDA_SUPPORT(1, is_sequence, (T))
};
#elif defined(BOOST_MPL_CFG_NO_HAS_XXX)
template<
typename BOOST_MPL_AUX_NA_PARAM(T)
>
struct is_sequence
: bool_<false>
{
};
#else
template<
typename BOOST_MPL_AUX_NA_PARAM(T)
>
struct is_sequence
: not_< is_same< typename begin<T>::type, void_ > >
{
BOOST_MPL_AUX_LAMBDA_SUPPORT(1, is_sequence, (T))
};
#endif // BOOST_MSVC
#if defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG)
template<> struct is_sequence<int>
: bool_<false>
{
};
#endif
BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, is_sequence)
}}
#endif // BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED