/Src/Dependencies/Boost/boost/variant/detail/substitute_fwd.hpp

 1//-----------------------------------------------------------------------------
 2// boost variant/detail/substitute_fwd.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// Distributed under the Boost Software License, Version 1.0. (See
10// accompanying file LICENSE_1_0.txt or copy at
11// http://www.boost.org/LICENSE_1_0.txt)
12
13#ifndef BOOST_VARIANT_DETAIL_SUBSTITUTE_FWD_HPP
14#define BOOST_VARIANT_DETAIL_SUBSTITUTE_FWD_HPP
15
16#include "boost/mpl/aux_/lambda_arity_param.hpp"
17#include "boost/mpl/aux_/template_arity.hpp"
18#include "boost/mpl/int_fwd.hpp"
19
20
21///////////////////////////////////////////////////////////////////////////////
22// BOOST_VARIANT_DETAIL_NO_SUBSTITUTE
23//
24// Defined if 'substitute' is not implementable on the current compiler.
25//
26
27#include "boost/mpl/aux_/config/ctps.hpp"
28#include "boost/mpl/aux_/config/ttp.hpp"
29
30#if defined(BOOST_NO_TEMPLATE_TEMPLATE_PARAMETERS) \
31 || defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
32 && !defined(BOOST_VARIANT_DETAIL_NO_SUBSTITUTE)
33#   define BOOST_VARIANT_DETAIL_NO_SUBSTITUTE
34#endif
35
36namespace boost {
37namespace detail { namespace variant {
38
39#if !defined(BOOST_VARIANT_DETAIL_NO_SUBSTITUTE)
40
41///////////////////////////////////////////////////////////////////////////////
42// metafunction substitute
43//
44// Substitutes one type for another in the given type expression.
45//
46template <
47      typename T, typename Dest, typename Source
48      BOOST_MPL_AUX_LAMBDA_ARITY_PARAM(
49          typename Arity = mpl::int_< mpl::aux::template_arity<T>::value >
50        )
51    >
52struct substitute;
53
54#endif // !defined(BOOST_VARIANT_DETAIL_NO_SUBSTITUTE)
55
56}} // namespace detail::variant
57} // namespace boost
58
59#endif // BOOST_VARIANT_DETAIL_SUBSTITUTE_FWD_HPP