Chris@16: #if !defined(BOOST_PROTO_DONT_USE_PREPROCESSED_FILES)
Chris@16: 
Chris@16:     #include <boost/proto/transform/detail/preprocessed/call.hpp>
Chris@16: 
Chris@16: #elif !defined(BOOST_PP_IS_ITERATING)
Chris@16: 
Chris@16:     #define BOOST_PROTO_NTH_RESULT_TYPE(Z, M, DATA)                                                 \
Chris@16:         typedef                                                                                     \
Chris@16:             typename when<_, BOOST_PP_CAT(A, M)>::template impl<Expr, State, Data>                  \
Chris@16:         BOOST_PP_CAT(a, M);                                                                         \
Chris@16:         typedef typename BOOST_PP_CAT(a, M)::result_type BOOST_PP_CAT(b, M);                        \
Chris@16:         /**/
Chris@16: 
Chris@16:     #define BOOST_PROTO_NTH_RESULT(Z, M, DATA)                                                      \
Chris@16:         detail::as_lvalue(BOOST_PP_CAT(a, M)()(e, s, d))                                            \
Chris@16:         /**/
Chris@16: 
Chris@16:     #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
Chris@16:         #pragma wave option(preserve: 2, line: 0, output: "preprocessed/call.hpp")
Chris@16:     #endif
Chris@16: 
Chris@16:     ///////////////////////////////////////////////////////////////////////////////
Chris@16:     /// \file call.hpp
Chris@16:     /// Contains definition of the call<> transform.
Chris@16:     //
Chris@16:     //  Copyright 2008 Eric Niebler. Distributed under the Boost
Chris@16:     //  Software License, Version 1.0. (See accompanying file
Chris@16:     //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16:     #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
Chris@16:         #pragma wave option(preserve: 1)
Chris@16:     #endif
Chris@16: 
Chris@16:     #define BOOST_PP_ITERATION_PARAMS_1                                                             \
Chris@16:         (3, (1, BOOST_PROTO_MAX_ARITY, <boost/proto/transform/detail/call.hpp>))
Chris@16:     #include BOOST_PP_ITERATE()
Chris@16: 
Chris@16:     #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
Chris@16:         #pragma wave option(output: null)
Chris@16:     #endif
Chris@16: 
Chris@16:     #undef BOOST_PROTO_NTH_RESULT
Chris@16:     #undef BOOST_PROTO_NTH_RESULT_TYPE
Chris@16: 
Chris@16: #else
Chris@16: 
Chris@16:     #define N BOOST_PP_ITERATION()
Chris@16: 
Chris@16:     #if N > 3
Chris@16:     /// \brief Call the PolymorphicFunctionObject \c Fun with the
Chris@16:     /// current expression, state and data, transformed according
Chris@16:     /// to \c A0 through \c AN.
Chris@16:     template<typename Fun BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
Chris@16:     struct call<Fun(BOOST_PP_ENUM_PARAMS(N, A))> : transform<call<Fun(BOOST_PP_ENUM_PARAMS(N, A))> >
Chris@16:     {
Chris@16:         template<typename Expr, typename State, typename Data>
Chris@16:         struct impl : transform_impl<Expr, State, Data>
Chris@16:         {
Chris@16:             BOOST_PP_REPEAT(N, BOOST_PROTO_NTH_RESULT_TYPE, ~)
Chris@16: 
Chris@16:             typedef detail::poly_function_traits<Fun, Fun(BOOST_PP_ENUM_PARAMS(N, b))> function_traits;
Chris@16:             typedef typename function_traits::result_type result_type;
Chris@16: 
Chris@16:             /// Let \c ax be <tt>when\<_, Ax\>()(e, s, d)</tt>
Chris@16:             /// for each \c x in <tt>[0,N]</tt>.
Chris@16:             /// Return <tt>Fun()(a0, a1,... aN)</tt>.
Chris@16:             ///
Chris@16:             /// \param e The current expression
Chris@16:             /// \param s The current state
Chris@16:             /// \param d An arbitrary data
Chris@16:             BOOST_FORCEINLINE
Chris@16:             result_type operator ()(
Chris@16:                 typename impl::expr_param   e
Chris@16:               , typename impl::state_param  s
Chris@16:               , typename impl::data_param   d
Chris@16:             ) const
Chris@16:             {
Chris@16:                 typedef typename function_traits::function_type function_type;
Chris@16:                 return function_type()(BOOST_PP_ENUM(N, BOOST_PROTO_NTH_RESULT, ~));
Chris@16:             }
Chris@16:         };
Chris@16:     };
Chris@16:     #endif
Chris@16: 
Chris@16:     #if N > 0
Chris@16:     /// \brief Call the PolymorphicFunctionObject \c Fun with the
Chris@16:     /// current expression, state and data, transformed according
Chris@16:     /// to \c A0 through \c AN.
Chris@16:     template<typename Fun BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
Chris@16:     struct call<Fun(BOOST_PP_ENUM_PARAMS(N, A)...)> : transform<call<Fun(BOOST_PP_ENUM_PARAMS(N, A)...)> >
Chris@16:     {
Chris@16:         template<typename Expr, typename State, typename Data>
Chris@16:         struct impl
Chris@16:           : call<
Chris@16:                 typename detail::expand_pattern<
Chris@16:                     proto::arity_of<Expr>::value // BUGBUG this isn't right. Could be pack(_child), should use arity of child!
Chris@16:                   , BOOST_PP_CAT(A, BOOST_PP_DEC(N))
Chris@16:                   , detail::BOOST_PP_CAT(expand_pattern_rest_, BOOST_PP_DEC(N))<
Chris@16:                         Fun
Chris@16:                         BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_DEC(N), A)
Chris@16:                     >
Chris@16:                 >::type
Chris@16:             >::template impl<Expr, State, Data>
Chris@16:         {};
Chris@16:     };
Chris@16:     #endif
Chris@16: 
Chris@16:     #undef N
Chris@16: 
Chris@16: #endif