Chris@16: //-----------------------------------------------------------------------------
Chris@16: // boost variant/detail/substitute_fwd.hpp header file
Chris@16: // See http://www.boost.org for updates, documentation, and revision history.
Chris@16: //-----------------------------------------------------------------------------
Chris@16: //
Chris@16: // Copyright (c) 2003
Chris@16: // Eric Friedman
Chris@16: //
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See
Chris@16: // accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: #ifndef BOOST_VARIANT_DETAIL_SUBSTITUTE_FWD_HPP
Chris@16: #define BOOST_VARIANT_DETAIL_SUBSTITUTE_FWD_HPP
Chris@16: 
Chris@16: #include "boost/mpl/aux_/lambda_arity_param.hpp"
Chris@16: #include "boost/mpl/aux_/template_arity.hpp"
Chris@16: #include "boost/mpl/int_fwd.hpp"
Chris@16: 
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: // BOOST_VARIANT_DETAIL_NO_SUBSTITUTE
Chris@16: //
Chris@16: // Defined if 'substitute' is not implementable on the current compiler.
Chris@16: //
Chris@16: 
Chris@16: #include "boost/mpl/aux_/config/ctps.hpp"
Chris@16: #include "boost/mpl/aux_/config/ttp.hpp"
Chris@16: 
Chris@16: #if defined(BOOST_NO_TEMPLATE_TEMPLATE_PARAMETERS) \
Chris@16:  && !defined(BOOST_VARIANT_DETAIL_NO_SUBSTITUTE)
Chris@16: #   define BOOST_VARIANT_DETAIL_NO_SUBSTITUTE
Chris@16: #endif
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace detail { namespace variant {
Chris@16: 
Chris@16: #if !defined(BOOST_VARIANT_DETAIL_NO_SUBSTITUTE)
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: // metafunction substitute
Chris@16: //
Chris@16: // Substitutes one type for another in the given type expression.
Chris@16: //
Chris@16: template <
Chris@16:       typename T, typename Dest, typename Source
Chris@16:       BOOST_MPL_AUX_LAMBDA_ARITY_PARAM(
Chris@16:           typename Arity = mpl::int_< mpl::aux::template_arity<T>::value >
Chris@16:         )
Chris@16:     >
Chris@16: struct substitute;
Chris@16: 
Chris@16: #endif // !defined(BOOST_VARIANT_DETAIL_NO_SUBSTITUTE)
Chris@16: 
Chris@16: }} // namespace detail::variant
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif // BOOST_VARIANT_DETAIL_SUBSTITUTE_FWD_HPP