| //----------------------------------------------------------------------------- |
| // 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 |