//----------------------------------------------------------------------------- | |
// boost variant/detail/substitute_fwd.hpp header file | |
// See http://www.boost.org for updates, documentation, and revision history. | |
//----------------------------------------------------------------------------- | |
// | |
// Copyright (c) 2003 | |
// Eric Friedman | |
// | |
// 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_SUBSTITUTE_FWD_HPP | |
#define BOOST_VARIANT_DETAIL_SUBSTITUTE_FWD_HPP | |
#include "boost/mpl/aux_/lambda_arity_param.hpp" | |
#include "boost/mpl/aux_/template_arity.hpp" | |
#include "boost/mpl/int_fwd.hpp" | |
/////////////////////////////////////////////////////////////////////////////// | |
// BOOST_VARIANT_DETAIL_NO_SUBSTITUTE | |
// | |
// Defined if 'substitute' is not implementable on the current compiler. | |
// | |
#include "boost/mpl/aux_/config/ctps.hpp" | |
#include "boost/mpl/aux_/config/ttp.hpp" | |
#if defined(BOOST_NO_TEMPLATE_TEMPLATE_PARAMETERS) \ | |
|| defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \ | |
&& !defined(BOOST_VARIANT_DETAIL_NO_SUBSTITUTE) | |
# define BOOST_VARIANT_DETAIL_NO_SUBSTITUTE | |
#endif | |
namespace boost { | |
namespace detail { namespace variant { | |
#if !defined(BOOST_VARIANT_DETAIL_NO_SUBSTITUTE) | |
/////////////////////////////////////////////////////////////////////////////// | |
// metafunction substitute | |
// | |
// Substitutes one type for another in the given type expression. | |
// | |
template < | |
typename T, typename Dest, typename Source | |
BOOST_MPL_AUX_LAMBDA_ARITY_PARAM( | |
typename Arity = mpl::int_< mpl::aux::template_arity<T>::value > | |
) | |
> | |
struct substitute; | |
#endif // !defined(BOOST_VARIANT_DETAIL_NO_SUBSTITUTE) | |
}} // namespace detail::variant | |
} // namespace boost | |
#endif // BOOST_VARIANT_DETAIL_SUBSTITUTE_FWD_HPP |