#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: is_sequence.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ | |
// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ | |
// $Revision: 49267 $ | |
#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 |