dbf9e800
 Hu Chunming
提交_GLIBCXX_USE_CX...
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// Copyright David Abrahams 2002.
// 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)
#ifndef BASES_DWA2002321_HPP
# define BASES_DWA2002321_HPP
# include <boost/python/detail/prefix.hpp>
# include <boost/python/detail/type_list.hpp>
# include <boost/python/detail/type_traits.hpp>
# include <boost/mpl/if.hpp>
# include <boost/mpl/bool.hpp>
# include <boost/preprocessor/enum_params_with_a_default.hpp>
# include <boost/preprocessor/enum_params.hpp>
namespace boost { namespace python {
# define BOOST_PYTHON_BASE_PARAMS BOOST_PP_ENUM_PARAMS_Z(1, BOOST_PYTHON_MAX_BASES, Base)
// A type list for specifying bases
template < BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT(BOOST_PYTHON_MAX_BASES, typename Base, mpl::void_) >
struct bases : detail::type_list< BOOST_PYTHON_BASE_PARAMS >::type
{};
namespace detail
{
template <class T> struct specifies_bases
: mpl::false_
{
};
template < BOOST_PP_ENUM_PARAMS_Z(1, BOOST_PYTHON_MAX_BASES, class Base) >
struct specifies_bases< bases< BOOST_PYTHON_BASE_PARAMS > >
: mpl::true_
{
};
template <class T, class Prev = bases<> >
struct select_bases
: mpl::if_<
specifies_bases<T>
, T
, Prev
>
{
};
}
# undef BOOST_PYTHON_BASE_PARAMS
}} // namespace boost::python
#endif // BASES_DWA2002321_HPP
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