Chris@16: 
Chris@16: #ifndef BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED
Chris@16: #define BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED
Chris@16: 
Chris@16: // Copyright Aleksey Gurtovoy 2002-2004
Chris@16: //
Chris@16: // Distributed under the Boost Software License, Version 1.0. 
Chris@16: // (See accompanying file LICENSE_1_0.txt or copy at 
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: // See http://www.boost.org/libs/mpl for documentation.
Chris@16: 
Chris@101: // $Id$
Chris@101: // $Date$
Chris@101: // $Revision$
Chris@16: 
Chris@16: #include <boost/mpl/not.hpp>
Chris@16: #include <boost/mpl/and.hpp>
Chris@16: #include <boost/mpl/begin_end.hpp>
Chris@16: #include <boost/mpl/if.hpp>
Chris@16: #include <boost/mpl/bool.hpp>
Chris@16: #include <boost/mpl/sequence_tag_fwd.hpp>
Chris@16: #include <boost/mpl/identity.hpp>
Chris@16: #include <boost/mpl/void.hpp>
Chris@16: #include <boost/mpl/aux_/has_tag.hpp>
Chris@16: #include <boost/mpl/aux_/has_begin.hpp>
Chris@16: #include <boost/mpl/aux_/na_spec.hpp>
Chris@16: #include <boost/mpl/aux_/lambda_support.hpp>
Chris@16: #include <boost/mpl/aux_/config/eti.hpp>
Chris@16: #include <boost/mpl/aux_/config/msvc.hpp>
Chris@16: #include <boost/mpl/aux_/config/workaround.hpp>
Chris@16: #if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
Chris@16: #   include <boost/mpl/aux_/msvc_is_class.hpp>
Chris@16: #elif BOOST_WORKAROUND(BOOST_MSVC, == 1300)
Chris@16: #   include <boost/type_traits/is_class.hpp>
Chris@16: #endif
Chris@16: 
Chris@16: #include <boost/type_traits/is_same.hpp>
Chris@16: 
Chris@16: namespace boost { namespace mpl {
Chris@16: 
Chris@16: #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
Chris@16: 
Chris@16: namespace aux {
Chris@16: 
Chris@16: // agurt, 11/jun/03: 
Chris@16: // MSVC 6.5/7.0 fails if 'has_begin' is instantiated on a class type that has a
Chris@16: // 'begin' member that doesn't name a type; e.g. 'has_begin< std::vector<int> >'
Chris@16: // would fail; requiring 'T' to have _both_ 'tag' and 'begin' members workarounds
Chris@16: // the issue for most real-world cases
Chris@16: template< typename T > struct is_sequence_impl
Chris@16:     : and_<
Chris@16:           identity< aux::has_tag<T> >
Chris@16:         , identity< aux::has_begin<T> >
Chris@16:         >
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: } // namespace aux
Chris@16:         
Chris@16: template<
Chris@16:       typename BOOST_MPL_AUX_NA_PARAM(T)
Chris@16:     >
Chris@16: struct is_sequence
Chris@16:     : if_<
Chris@16: #if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
Chris@16:           aux::msvc_is_class<T> 
Chris@16: #else
Chris@16:           boost::is_class<T> 
Chris@16: #endif
Chris@16:         , aux::is_sequence_impl<T>
Chris@16:         , bool_<false>
Chris@16:         >::type
Chris@16: {
Chris@16:     BOOST_MPL_AUX_LAMBDA_SUPPORT(1, is_sequence, (T))
Chris@16: };
Chris@16: 
Chris@16: #elif defined(BOOST_MPL_CFG_NO_HAS_XXX)
Chris@16: 
Chris@16: template<
Chris@16:       typename BOOST_MPL_AUX_NA_PARAM(T)
Chris@16:     >
Chris@16: struct is_sequence
Chris@16:     : bool_<false>
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: #else
Chris@16: 
Chris@16: template<
Chris@16:       typename BOOST_MPL_AUX_NA_PARAM(T)
Chris@16:     >
Chris@16: struct is_sequence
Chris@16:     : not_< is_same< typename begin<T>::type, void_ > >
Chris@16: {
Chris@16:     BOOST_MPL_AUX_LAMBDA_SUPPORT(1, is_sequence, (T))
Chris@16: };
Chris@16: 
Chris@16: #endif // BOOST_MSVC
Chris@16: 
Chris@16: #if defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG)
Chris@16: template<> struct is_sequence<int>
Chris@16:     : bool_<false>
Chris@16: {
Chris@16: };
Chris@16: #endif
Chris@16: 
Chris@16: BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, is_sequence)
Chris@16: 
Chris@16: }}
Chris@16: 
Chris@16: #endif // BOOST_MPL_IS_SEQUENCE_HPP_INCLUDED