59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
//-----------------------------------------------------------------------------
|
|
// boost variant/detail/over_sequence.hpp header file
|
|
// See http://www.boost.org for updates, documentation, and revision history.
|
|
//-----------------------------------------------------------------------------
|
|
//
|
|
// Copyright (c) 2003
|
|
// Eric Friedman
|
|
//
|
|
// Portions Copyright (C) 2002 David Abrahams
|
|
//
|
|
// 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 BOOST_VARIANT_DETAIL_OVER_SEQUENCE_HPP
|
|
#define BOOST_VARIANT_DETAIL_OVER_SEQUENCE_HPP
|
|
|
|
#include <boost/mpl/aux_/config/ctps.hpp>
|
|
|
|
|
|
namespace boost {
|
|
namespace detail { namespace variant {
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// (detail) class over_sequence
|
|
//
|
|
// Wrapper used to indicate bounded types for variant are from type sequence.
|
|
//
|
|
template <typename Types>
|
|
struct over_sequence
|
|
{
|
|
typedef Types type;
|
|
};
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// (detail) metafunction is_over_sequence (modeled on code by David Abrahams)
|
|
//
|
|
// Indicates whether the specified type is of form over_sequence<...> or not.
|
|
//
|
|
|
|
|
|
template <typename T>
|
|
struct is_over_sequence
|
|
: mpl::false_
|
|
{
|
|
};
|
|
|
|
template <typename Types>
|
|
struct is_over_sequence< over_sequence<Types> >
|
|
: mpl::true_
|
|
{
|
|
};
|
|
|
|
|
|
}} // namespace detail::variant
|
|
} // namespace boost
|
|
|
|
#endif // BOOST_VARIANT_DETAIL_OVER_SEQUENCE_HPP
|