1//-----------------------------------------------------------------------------
2// boost variant/detail/over_sequence.hpp header file
3// See http://www.boost.org for updates, documentation, and revision history.
4//-----------------------------------------------------------------------------
5//
6// Copyright (c) 2003
7// Eric Friedman
8//
9// Portions Copyright (C) 2002 David Abrahams
10//
11// Distributed under the Boost Software License, Version 1.0. (See
12// accompanying file LICENSE_1_0.txt or copy at
13// http://www.boost.org/LICENSE_1_0.txt)
14
15#ifndef BOOST_VARIANT_DETAIL_OVER_SEQUENCE_HPP
16#define BOOST_VARIANT_DETAIL_OVER_SEQUENCE_HPP
17
18#include <boost/mpl/aux_/config/ctps.hpp>
19
20
21namespace boost {
22namespace detail { namespace variant {
23
24///////////////////////////////////////////////////////////////////////////////
25// (detail) class over_sequence
26//
27// Wrapper used to indicate bounded types for variant are from type sequence.
28//
29template <typename Types>
30struct over_sequence
31{
32 typedef Types type;
33};
34
35///////////////////////////////////////////////////////////////////////////////
36// (detail) metafunction is_over_sequence (modeled on code by David Abrahams)
37//
38// Indicates whether the specified type is of form over_sequence<...> or not.
39//
40
41
42template <typename T>
43struct is_over_sequence
44 : mpl::false_
45{
46};
47
48template <typename Types>
49struct is_over_sequence< over_sequence<Types> >
50 : mpl::true_
51{
52};
53
54
55}} // namespace detail::variant
56} // namespace boost
57
58#endif // BOOST_VARIANT_DETAIL_OVER_SEQUENCE_HPP
59