boost/proto/transform/impl.hpp
/////////////////////////////////////////////////////////////////////////////// /// \file impl.hpp /// Contains definition of transform<> and transform_impl<> helpers. // // Copyright 2008 Eric Niebler. 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_PROTO_TRANSFORM_IMPL_HPP_EAN_04_03_2008 #define BOOST_PROTO_TRANSFORM_IMPL_HPP_EAN_04_03_2008 #include <boost/config.hpp> #include <boost/proto/proto_fwd.hpp> namespace boost { namespace proto { #ifdef BOOST_NO_RVALUE_REFERENCES /// INTERNAL ONLY /// #define BOOST_PROTO_TRANSFORM_(PrimitiveTransform, X) \ BOOST_PROTO_CALLABLE() \ typedef X proto_is_transform_; \ typedef PrimitiveTransform transform_type; \ \ template<typename Sig> \ struct result \ { \ typedef typename boost::proto::detail::apply_transform<Sig>::result_type type; \ }; \ \ template<typename Expr> \ typename boost::proto::detail::apply_transform<transform_type(Expr &)>::result_type \ operator ()(Expr &e) const \ { \ int i = 0; \ return boost::proto::detail::apply_transform<transform_type(Expr &)>()(e, i, i); \ } \ \ template<typename Expr, typename State> \ typename boost::proto::detail::apply_transform<transform_type(Expr &, State &)>::result_type \ operator ()(Expr &e, State &s) const \ { \ int i = 0; \ return boost::proto::detail::apply_transform<transform_type(Expr &, State &)>()(e, s, i); \ } \ \ template<typename Expr, typename State> \ typename boost::proto::detail::apply_transform<transform_type(Expr &, State const &)>::result_type \ operator ()(Expr &e, State const &s) const \ { \ int i = 0; \ return boost::proto::detail::apply_transform<transform_type(Expr &, State const &)>()(e, s, i); \ } \ \ template<typename Expr, typename State, typename Data> \ typename boost::proto::detail::apply_transform<transform_type(Expr &, State &, Data &)>::result_type \ operator ()(Expr &e, State &s, Data &d) const \ { \ return boost::proto::detail::apply_transform<transform_type(Expr &, State &, Data &)>()(e, s, d); \ } \ \ template<typename Expr, typename State, typename Data> \ typename boost::proto::detail::apply_transform<transform_type(Expr &, State const &, Data &)>::result_type \ operator ()(Expr &e, State const &s, Data &d) const \ { \ return boost::proto::detail::apply_transform<transform_type(Expr &, State const &, Data &)>()(e, s, d); \ } \ /**/ #else /// INTERNAL ONLY /// #define BOOST_PROTO_TRANSFORM_(PrimitiveTransform, X) \ BOOST_PROTO_CALLABLE() \ typedef X proto_is_transform_; \ typedef PrimitiveTransform transform_type; \ \ template<typename Sig> \ struct result \ { \ typedef typename boost::proto::detail::apply_transform<Sig>::result_type type; \ }; \ \ template<typename Expr> \ typename boost::proto::detail::apply_transform<transform_type(Expr const &)>::result_type \ operator ()(Expr &&e) const \ { \ int i = 0; \ return boost::proto::detail::apply_transform<transform_type(Expr const &)>()(e, i, i); \ } \ \ template<typename Expr, typename State> \ typename boost::proto::detail::apply_transform<transform_type(Expr const &, State const &)>::result_type \ operator ()(Expr &&e, State &&s) const \ { \ int i = 0; \ return boost::proto::detail::apply_transform<transform_type(Expr const &, State const &)>()(e, s, i); \ } \ \ template<typename Expr, typename State, typename Data> \ typename boost::proto::detail::apply_transform<transform_type(Expr const &, State const &, Data const &)>::result_type \ operator ()(Expr &&e, State &&s, Data &&d) const \ { \ return boost::proto::detail::apply_transform<transform_type(Expr const &, State const &, Data const &)>()(e, s, d); \ } \ /**/ #endif #define BOOST_PROTO_TRANSFORM(PrimitiveTransform) \ BOOST_PROTO_TRANSFORM_(PrimitiveTransform, void) \ /**/ namespace detail { template<typename Sig> struct apply_transform; template<typename PrimitiveTransform, typename Expr> struct apply_transform<PrimitiveTransform(Expr)> : PrimitiveTransform::template impl<Expr, int, int> {}; template<typename PrimitiveTransform, typename Expr, typename State> struct apply_transform<PrimitiveTransform(Expr, State)> : PrimitiveTransform::template impl<Expr, State, int> {}; template<typename PrimitiveTransform, typename Expr, typename State, typename Data> struct apply_transform<PrimitiveTransform(Expr, State, Data)> : PrimitiveTransform::template impl<Expr, State, Data> {}; } template<typename PrimitiveTransform, typename X> struct transform { BOOST_PROTO_TRANSFORM_(PrimitiveTransform, X) }; template<typename Expr, typename State, typename Data> struct transform_impl { typedef Expr const expr; typedef Expr const &expr_param; typedef State const state; typedef State const &state_param; typedef Data const data; typedef Data const &data_param; }; template<typename Expr, typename State, typename Data> struct transform_impl<Expr &, State, Data> { typedef Expr expr; typedef Expr &expr_param; typedef State const state; typedef State const &state_param; typedef Data const data; typedef Data const &data_param; }; template<typename Expr, typename State, typename Data> struct transform_impl<Expr, State &, Data> { typedef Expr const expr; typedef Expr const &expr_param; typedef State state; typedef State &state_param; typedef Data const data; typedef Data const &data_param; }; template<typename Expr, typename State, typename Data> struct transform_impl<Expr, State, Data &> { typedef Expr const expr; typedef Expr const &expr_param; typedef State const state; typedef State const &state_param; typedef Data data; typedef Data &data_param; }; template<typename Expr, typename State, typename Data> struct transform_impl<Expr &, State &, Data> { typedef Expr expr; typedef Expr &expr_param; typedef State state; typedef State &state_param; typedef Data const data; typedef Data const &data_param; }; template<typename Expr, typename State, typename Data> struct transform_impl<Expr &, State, Data &> { typedef Expr expr; typedef Expr &expr_param; typedef State const state; typedef State const &state_param; typedef Data data; typedef Data &data_param; }; template<typename Expr, typename State, typename Data> struct transform_impl<Expr, State &, Data &> { typedef Expr const expr; typedef Expr const &expr_param; typedef State state; typedef State &state_param; typedef Data data; typedef Data &data_param; }; template<typename Expr, typename State, typename Data> struct transform_impl<Expr &, State &, Data &> { typedef Expr expr; typedef Expr &expr_param; typedef State state; typedef State &state_param; typedef Data data; typedef Data &data_param; }; }} // namespace boost::proto #endif