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86 lines
3.5 KiB
86 lines
3.5 KiB
#if !defined(BOOST_PROTO_DONT_USE_PREPROCESSED_FILES) |
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#include <boost/proto/transform/detail/preprocessed/call.hpp> |
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#elif !defined(BOOST_PP_IS_ITERATING) |
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#define BOOST_PROTO_NTH_RESULT_TYPE(Z, M, DATA) \ |
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typedef \ |
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typename when<_, BOOST_PP_CAT(A, M)>::template impl<Expr, State, Data> \ |
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BOOST_PP_CAT(a, M); \ |
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typedef typename BOOST_PP_CAT(a, M)::result_type BOOST_PP_CAT(b, M); \ |
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/**/ |
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#define BOOST_PROTO_NTH_RESULT(Z, M, DATA) \ |
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detail::as_lvalue(BOOST_PP_CAT(a, M)()(e, s, d)) \ |
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/**/ |
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#if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES) |
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#pragma wave option(preserve: 2, line: 0, output: "preprocessed/call.hpp") |
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#endif |
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/////////////////////////////////////////////////////////////////////////////// |
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/// \file call.hpp |
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/// Contains definition of the call<> transform. |
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// |
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// Copyright 2008 Eric Niebler. Distributed under the Boost |
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// Software License, Version 1.0. (See accompanying file |
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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#if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES) |
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#pragma wave option(preserve: 1) |
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#endif |
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#if BOOST_PROTO_MAX_ARITY > 3 |
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#define BOOST_PP_ITERATION_PARAMS_1 \ |
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(3, (4, BOOST_PROTO_MAX_ARITY, <boost/proto/transform/detail/call.hpp>)) |
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#include BOOST_PP_ITERATE() |
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#endif |
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#if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES) |
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#pragma wave option(output: null) |
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#endif |
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#undef BOOST_PROTO_NTH_RESULT |
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#undef BOOST_PROTO_NTH_RESULT_TYPE |
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#else |
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#define N BOOST_PP_ITERATION() |
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/// \brief Call the PolymorphicFunctionObject \c Fun with the |
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/// current expression, state and data, transformed according |
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/// to \c A0 through \c AN. |
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template<typename Fun BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)> |
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struct call<Fun(BOOST_PP_ENUM_PARAMS(N, A))> : transform<call<Fun(BOOST_PP_ENUM_PARAMS(N, A))> > |
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{ |
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template<typename Expr, typename State, typename Data> |
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struct impl : transform_impl<Expr, State, Data> |
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{ |
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BOOST_PP_REPEAT(N, BOOST_PROTO_NTH_RESULT_TYPE, ~) |
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typedef detail::poly_function_traits<Fun, Fun(BOOST_PP_ENUM_PARAMS(N, b))> function_traits; |
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typedef typename function_traits::result_type result_type; |
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/// Let \c ax be <tt>when\<_, Ax\>()(e, s, d)</tt> |
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/// for each \c x in <tt>[0,N]</tt>. |
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/// Return <tt>Fun()(a0, a1,... aN)</tt>. |
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/// |
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/// \param e The current expression |
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/// \param s The current state |
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/// \param d An arbitrary data |
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result_type operator ()( |
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typename impl::expr_param e |
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, typename impl::state_param s |
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, typename impl::data_param d |
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) const |
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{ |
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typedef typename function_traits::function_type function_type; |
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return function_type()(BOOST_PP_ENUM(N, BOOST_PROTO_NTH_RESULT, ~)); |
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} |
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}; |
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}; |
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#undef N |
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#endif
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