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143 lines
8.0 KiB
143 lines
8.0 KiB
#if !defined(BOOST_PROTO_DONT_USE_PREPROCESSED_FILES) |
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#include <boost/proto/transform/detail/preprocessed/fold_impl.hpp> |
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#elif !defined(BOOST_PP_IS_ITERATING) |
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#define BOOST_PROTO_CHILD_N_TYPE(N) \ |
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BOOST_PP_CAT(proto_child, N) \ |
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/**/ |
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#define BOOST_PROTO_FOLD_STATE_TYPE(Z, N, DATA) \ |
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typedef \ |
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typename when<_, Fun>::template impl< \ |
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typename result_of::child_c<Expr, N>::type \ |
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, BOOST_PP_CAT(state, N) \ |
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, Data \ |
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>::result_type \ |
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BOOST_PP_CAT(state, BOOST_PP_INC(N)); \ |
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/**/ |
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#define BOOST_PROTO_FOLD_STATE(Z, N, DATA) \ |
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BOOST_PP_CAT(state, BOOST_PP_INC(N)) \ |
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BOOST_PP_CAT(s, BOOST_PP_INC(N)) \ |
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= typename when<_, Fun>::template impl< \ |
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typename result_of::child_c<Expr, N>::type \ |
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, BOOST_PP_CAT(state, N) \ |
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, Data \ |
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>()( \ |
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proto::child_c<N>(e) \ |
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, BOOST_PP_CAT(s, N) \ |
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, d \ |
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); \ |
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/**/ |
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#define BOOST_PROTO_REVERSE_FOLD_STATE_TYPE(Z, N, DATA) \ |
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typedef \ |
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typename when<_, Fun>::template impl< \ |
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typename result_of::child_c< \ |
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Expr \ |
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, BOOST_PP_SUB(DATA, BOOST_PP_INC(N)) \ |
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>::type \ |
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, BOOST_PP_CAT(state, BOOST_PP_SUB(DATA, N)) \ |
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, Data \ |
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>::result_type \ |
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BOOST_PP_CAT(state, BOOST_PP_SUB(DATA, BOOST_PP_INC(N))); \ |
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/**/ |
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#define BOOST_PROTO_REVERSE_FOLD_STATE(Z, N, DATA) \ |
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BOOST_PP_CAT(state, BOOST_PP_SUB(DATA, BOOST_PP_INC(N))) \ |
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BOOST_PP_CAT(s, BOOST_PP_SUB(DATA, BOOST_PP_INC(N))) \ |
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= typename when<_, Fun>::template impl< \ |
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typename result_of::child_c< \ |
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Expr \ |
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, BOOST_PP_SUB(DATA, BOOST_PP_INC(N)) \ |
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>::type \ |
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, BOOST_PP_CAT(state, BOOST_PP_SUB(DATA, N)) \ |
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, Data \ |
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>()( \ |
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proto::child_c<BOOST_PP_SUB(DATA, BOOST_PP_INC(N))>(e) \ |
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, BOOST_PP_CAT(s, BOOST_PP_SUB(DATA, N)) \ |
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, d \ |
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); \ |
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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/fold_impl.hpp") |
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#endif |
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/////////////////////////////////////////////////////////////////////////////// |
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/// \file fold_impl.hpp |
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/// Contains definition of fold_impl<> and reverse_fold_impl<> templates. |
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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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#define BOOST_PP_ITERATION_PARAMS_1 \ |
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(3, (1, BOOST_PROTO_MAX_ARITY, <boost/proto/transform/detail/fold_impl.hpp>)) |
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#include BOOST_PP_ITERATE() |
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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_REVERSE_FOLD_STATE |
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#undef BOOST_PROTO_REVERSE_FOLD_STATE_TYPE |
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#undef BOOST_PROTO_FOLD_STATE |
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#undef BOOST_PROTO_FOLD_STATE_TYPE |
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#undef BOOST_PROTO_CHILD_N_TYPE |
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#else |
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#define N BOOST_PP_ITERATION() |
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template<typename State0, typename Fun, typename Expr, typename State, typename Data> |
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struct fold_impl<State0, Fun, Expr, State, Data, N> |
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: transform_impl<Expr, State, Data> |
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{ |
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typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state0; |
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BOOST_PP_REPEAT(N, BOOST_PROTO_FOLD_STATE_TYPE, N) |
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typedef BOOST_PP_CAT(state, N) result_type; |
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result_type operator ()( |
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typename fold_impl::expr_param e |
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, typename fold_impl::state_param s |
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, typename fold_impl::data_param d |
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) const |
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{ |
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state0 s0 = |
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typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d); |
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BOOST_PP_REPEAT(N, BOOST_PROTO_FOLD_STATE, N) |
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return BOOST_PP_CAT(s, N); |
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} |
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}; |
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template<typename State0, typename Fun, typename Expr, typename State, typename Data> |
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struct reverse_fold_impl<State0, Fun, Expr, State, Data, N> |
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: transform_impl<Expr, State, Data> |
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{ |
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typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type BOOST_PP_CAT(state, N); |
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BOOST_PP_REPEAT(N, BOOST_PROTO_REVERSE_FOLD_STATE_TYPE, N) |
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typedef state0 result_type; |
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result_type operator ()( |
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typename reverse_fold_impl::expr_param e |
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, typename reverse_fold_impl::state_param s |
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, typename reverse_fold_impl::data_param d |
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) const |
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{ |
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BOOST_PP_CAT(state, N) BOOST_PP_CAT(s, N) = |
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typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d); |
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BOOST_PP_REPEAT(N, BOOST_PROTO_REVERSE_FOLD_STATE, N) |
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return s0; |
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} |
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}; |
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#undef N |
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#endif
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