| #ifndef BOOST_PP_IS_ITERATING |
| /////////////////////////////////////////////////////////////////////////////// |
| /// \file default.hpp |
| /// Contains definition of the _default transform, which gives operators their |
| /// usual C++ meanings and uses Boost.Typeof to deduce return types. |
| // |
| // 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_DEFAULT_HPP_EAN_04_04_2008 |
| #define BOOST_PROTO_TRANSFORM_DEFAULT_HPP_EAN_04_04_2008 |
| |
| #include <boost/proto/detail/prefix.hpp> |
| #include <boost/preprocessor/iteration/iterate.hpp> |
| #include <boost/preprocessor/repetition/repeat.hpp> |
| #include <boost/preprocessor/repetition/enum_shifted.hpp> |
| #include <boost/preprocessor/repetition/enum_shifted_params.hpp> |
| #include <boost/ref.hpp> |
| #include <boost/get_pointer.hpp> |
| #include <boost/utility/enable_if.hpp> |
| #include <boost/type_traits/is_member_pointer.hpp> |
| #include <boost/type_traits/is_member_object_pointer.hpp> |
| #include <boost/type_traits/is_member_function_pointer.hpp> |
| #include <boost/proto/proto_fwd.hpp> |
| #include <boost/proto/traits.hpp> |
| #include <boost/proto/transform/impl.hpp> |
| #include <boost/proto/transform/arg.hpp> |
| #include <boost/proto/detail/decltype.hpp> |
| #include <boost/proto/detail/suffix.hpp> |
| |
| namespace boost { namespace proto |
| { |
| template<typename Grammar BOOST_PROTO_WHEN_BUILDING_DOCS(= detail::_default)> |
| struct _default |
| : transform<_default<Grammar> > |
| { |
| template<typename Expr, typename State, typename Data, typename Tag, long Arity> |
| struct impl2; |
| |
| template<typename Expr, typename State, typename Data, typename Tag> |
| struct impl2<Expr, State, Data, Tag, 0> |
| : _value::impl<Expr, State, Data> |
| {}; |
| |
| #define BOOST_PROTO_UNARY_OP_RESULT(OP, TAG, MAKE) \ |
| template<typename Expr, typename State, typename Data> \ |
| struct impl2<Expr, State, Data, TAG, 1> \ |
| : transform_impl<Expr, State, Data> \ |
| { \ |
| private: \ |
| typedef typename result_of::child_c<Expr, 0>::type e0; \ |
| typedef typename Grammar::template impl<e0, State, Data>::result_type r0; \ |
| public: \ |
| BOOST_PROTO_DECLTYPE_(OP proto::detail::MAKE<r0>(), result_type) \ |
| result_type operator ()( \ |
| typename impl2::expr_param e \ |
| , typename impl2::state_param s \ |
| , typename impl2::data_param d \ |
| ) const \ |
| { \ |
| typename Grammar::template impl<e0, State, Data> t0; \ |
| return OP t0(proto::child_c<0>(e), s, d); \ |
| } \ |
| }; \ |
| /**/ |
| |
| #define BOOST_PROTO_BINARY_OP_RESULT(OP, TAG, LMAKE, RMAKE) \ |
| template<typename Expr, typename State, typename Data> \ |
| struct impl2<Expr, State, Data, TAG, 2> \ |
| : transform_impl<Expr, State, Data> \ |
| { \ |
| private: \ |
| typedef typename result_of::child_c<Expr, 0>::type e0; \ |
| typedef typename result_of::child_c<Expr, 1>::type e1; \ |
| typedef typename Grammar::template impl<e0, State, Data>::result_type r0; \ |
| typedef typename Grammar::template impl<e1, State, Data>::result_type r1; \ |
| public: \ |
| BOOST_PROTO_DECLTYPE_( \ |
| proto::detail::LMAKE<r0>() OP proto::detail::RMAKE<r1>() \ |
| , result_type \ |
| ) \ |
| result_type operator ()( \ |
| typename impl2::expr_param e \ |
| , typename impl2::state_param s \ |
| , typename impl2::data_param d \ |
| ) const \ |
| { \ |
| typename Grammar::template impl<e0, State, Data> t0; \ |
| typename Grammar::template impl<e1, State, Data> t1; \ |
| return t0(proto::child_c<0>(e), s, d) \ |
| OP t1(proto::child_c<1>(e), s, d); \ |
| } \ |
| }; \ |
| /**/ |
| |
| BOOST_PROTO_UNARY_OP_RESULT(+, tag::unary_plus, make) |
| BOOST_PROTO_UNARY_OP_RESULT(-, tag::negate, make) |
| BOOST_PROTO_UNARY_OP_RESULT(*, tag::dereference, make) |
| BOOST_PROTO_UNARY_OP_RESULT(~, tag::complement, make) |
| BOOST_PROTO_UNARY_OP_RESULT(&, tag::address_of, make) |
| BOOST_PROTO_UNARY_OP_RESULT(!, tag::logical_not, make) |
| BOOST_PROTO_UNARY_OP_RESULT(++, tag::pre_inc, make_mutable) |
| BOOST_PROTO_UNARY_OP_RESULT(--, tag::pre_dec, make_mutable) |
| |
| BOOST_PROTO_BINARY_OP_RESULT(<<, tag::shift_left, make_mutable, make) |
| BOOST_PROTO_BINARY_OP_RESULT(>>, tag::shift_right, make_mutable, make_mutable) |
| BOOST_PROTO_BINARY_OP_RESULT(*, tag::multiplies, make, make) |
| BOOST_PROTO_BINARY_OP_RESULT(/, tag::divides, make, make) |
| BOOST_PROTO_BINARY_OP_RESULT(%, tag::modulus, make, make) |
| BOOST_PROTO_BINARY_OP_RESULT(+, tag::plus, make, make) |
| BOOST_PROTO_BINARY_OP_RESULT(-, tag::minus, make, make) |
| BOOST_PROTO_BINARY_OP_RESULT(<, tag::less, make, make) |
| BOOST_PROTO_BINARY_OP_RESULT(>, tag::greater, make, make) |
| BOOST_PROTO_BINARY_OP_RESULT(<=, tag::less_equal, make, make) |
| BOOST_PROTO_BINARY_OP_RESULT(>=, tag::greater_equal, make, make) |
| BOOST_PROTO_BINARY_OP_RESULT(==, tag::equal_to, make, make) |
| BOOST_PROTO_BINARY_OP_RESULT(!=, tag::not_equal_to, make, make) |
| BOOST_PROTO_BINARY_OP_RESULT(||, tag::logical_or, make, make) |
| BOOST_PROTO_BINARY_OP_RESULT(&&, tag::logical_and, make, make) |
| BOOST_PROTO_BINARY_OP_RESULT(&, tag::bitwise_and, make, make) |
| BOOST_PROTO_BINARY_OP_RESULT(|, tag::bitwise_or, make, make) |
| BOOST_PROTO_BINARY_OP_RESULT(^, tag::bitwise_xor, make, make) |
| |
| BOOST_PROTO_BINARY_OP_RESULT(=, tag::assign, make_mutable, make) |
| BOOST_PROTO_BINARY_OP_RESULT(<<=, tag::shift_left_assign, make_mutable, make) |
| BOOST_PROTO_BINARY_OP_RESULT(>>=, tag::shift_right_assign, make_mutable, make) |
| BOOST_PROTO_BINARY_OP_RESULT(*=, tag::multiplies_assign, make_mutable, make) |
| BOOST_PROTO_BINARY_OP_RESULT(/=, tag::divides_assign, make_mutable, make) |
| BOOST_PROTO_BINARY_OP_RESULT(%=, tag::modulus_assign, make_mutable, make) |
| BOOST_PROTO_BINARY_OP_RESULT(+=, tag::plus_assign, make_mutable, make) |
| BOOST_PROTO_BINARY_OP_RESULT(-=, tag::minus_assign, make_mutable, make) |
| BOOST_PROTO_BINARY_OP_RESULT(&=, tag::bitwise_and_assign, make_mutable, make) |
| BOOST_PROTO_BINARY_OP_RESULT(|=, tag::bitwise_or_assign, make_mutable, make) |
| BOOST_PROTO_BINARY_OP_RESULT(^=, tag::bitwise_xor_assign, make_mutable, make) |
| |
| #undef BOOST_PROTO_UNARY_OP_RESULT |
| #undef BOOST_PROTO_BINARY_OP_RESULT |
| |
| /// INTERNAL ONLY |
| template<typename Expr, typename State, typename Data> |
| struct is_member_function_invocation |
| : is_member_function_pointer< |
| typename remove_const< |
| typename remove_reference< |
| typename Grammar::template impl< |
| typename result_of::child_c<Expr, 1>::type |
| , State |
| , Data |
| >::result_type |
| >::type |
| >::type |
| > |
| {}; |
| |
| /// INTERNAL ONLY |
| template<typename Expr, typename State, typename Data, bool IsMemFunCall> |
| struct memfun_impl |
| : transform_impl<Expr, State, Data> |
| { |
| private: |
| typedef typename result_of::child_c<Expr, 0>::type e0; |
| typedef typename result_of::child_c<Expr, 1>::type e1; |
| typedef typename Grammar::template impl<e0, State, Data>::result_type r0; |
| typedef typename Grammar::template impl<e1, State, Data>::result_type r1; |
| public: |
| typedef typename detail::mem_ptr_fun<r0, r1>::result_type result_type; |
| result_type operator ()( |
| typename memfun_impl::expr_param e |
| , typename memfun_impl::state_param s |
| , typename memfun_impl::data_param d |
| ) const |
| { |
| typename Grammar::template impl<e0, State, Data> t0; |
| typename Grammar::template impl<e1, State, Data> t1; |
| return detail::mem_ptr_fun<r0, r1>()( |
| t0(proto::child_c<0>(e), s, d) |
| , t1(proto::child_c<1>(e), s, d) |
| ); |
| } |
| }; |
| |
| /// INTERNAL ONLY |
| template<typename Expr, typename State, typename Data> |
| struct memfun_impl<Expr, State, Data, true> |
| : transform_impl<Expr, State, Data> |
| { |
| private: |
| typedef typename result_of::child_c<Expr, 0>::type e0; |
| typedef typename result_of::child_c<Expr, 1>::type e1; |
| typedef typename Grammar::template impl<e0, State, Data>::result_type r0; |
| typedef typename Grammar::template impl<e1, State, Data>::result_type r1; |
| public: |
| typedef detail::memfun<r0, r1> result_type; |
| result_type const operator ()( |
| typename memfun_impl::expr_param e |
| , typename memfun_impl::state_param s |
| , typename memfun_impl::data_param d |
| ) const |
| { |
| typename Grammar::template impl<e0, State, Data> t0; |
| typename Grammar::template impl<e1, State, Data> t1; |
| return detail::memfun<r0, r1>( |
| t0(proto::child_c<0>(e), s, d) |
| , t1(proto::child_c<1>(e), s, d) |
| ); |
| } |
| }; |
| |
| template<typename Expr, typename State, typename Data> |
| struct impl2<Expr, State, Data, tag::mem_ptr, 2> |
| : memfun_impl<Expr, State, Data, is_member_function_invocation<Expr, State, Data>::value> |
| {}; |
| |
| template<typename Expr, typename State, typename Data> |
| struct impl2<Expr, State, Data, tag::post_inc, 1> |
| : transform_impl<Expr, State, Data> |
| { |
| private: |
| typedef typename result_of::child_c<Expr, 0>::type e0; |
| typedef typename Grammar::template impl<e0, State, Data>::result_type r0; |
| public: |
| BOOST_PROTO_DECLTYPE_(proto::detail::make_mutable<r0>() ++, result_type) |
| result_type operator ()( |
| typename impl2::expr_param e |
| , typename impl2::state_param s |
| , typename impl2::data_param d |
| ) const |
| { |
| typename Grammar::template impl<e0, State, Data> t0; |
| return t0(proto::child_c<0>(e), s, d) ++; |
| } |
| }; |
| |
| template<typename Expr, typename State, typename Data> |
| struct impl2<Expr, State, Data, tag::post_dec, 1> |
| : transform_impl<Expr, State, Data> |
| { |
| private: |
| typedef typename result_of::child_c<Expr, 0>::type e0; |
| typedef typename Grammar::template impl<e0, State, Data>::result_type r0; |
| public: |
| BOOST_PROTO_DECLTYPE_(proto::detail::make_mutable<r0>() --, result_type) |
| result_type operator ()( |
| typename impl2::expr_param e |
| , typename impl2::state_param s |
| , typename impl2::data_param d |
| ) const |
| { |
| typename Grammar::template impl<e0, State, Data> t0; |
| return t0(proto::child_c<0>(e), s, d) --; |
| } |
| }; |
| |
| template<typename Expr, typename State, typename Data> |
| struct impl2<Expr, State, Data, tag::subscript, 2> |
| : transform_impl<Expr, State, Data> |
| { |
| private: |
| typedef typename result_of::child_c<Expr, 0>::type e0; |
| typedef typename result_of::child_c<Expr, 1>::type e1; |
| typedef typename Grammar::template impl<e0, State, Data>::result_type r0; |
| typedef typename Grammar::template impl<e1, State, Data>::result_type r1; |
| public: |
| BOOST_PROTO_DECLTYPE_( |
| proto::detail::make_subscriptable<r0>() [ proto::detail::make<r1>() ] |
| , result_type |
| ) |
| result_type operator ()( |
| typename impl2::expr_param e |
| , typename impl2::state_param s |
| , typename impl2::data_param d |
| ) const |
| { |
| typename Grammar::template impl<e0, State, Data> t0; |
| typename Grammar::template impl<e1, State, Data> t1; |
| return t0(proto::child_c<0>(e), s, d) [ |
| t1(proto::child_c<1>(e), s, d) ]; |
| } |
| }; |
| |
| template<typename Expr, typename State, typename Data> |
| struct impl2<Expr, State, Data, tag::if_else_, 3> |
| : transform_impl<Expr, State, Data> |
| { |
| private: |
| typedef typename result_of::child_c<Expr, 0>::type e0; |
| typedef typename result_of::child_c<Expr, 1>::type e1; |
| typedef typename result_of::child_c<Expr, 2>::type e2; |
| typedef typename Grammar::template impl<e0, State, Data>::result_type r0; |
| typedef typename Grammar::template impl<e1, State, Data>::result_type r1; |
| typedef typename Grammar::template impl<e2, State, Data>::result_type r2; |
| public: |
| BOOST_PROTO_DECLTYPE_( |
| proto::detail::make<r0>() |
| ? proto::detail::make<r1>() |
| : proto::detail::make<r2>() |
| , result_type |
| ) |
| result_type operator ()( |
| typename impl2::expr_param e |
| , typename impl2::state_param s |
| , typename impl2::data_param d |
| ) const |
| { |
| typename Grammar::template impl<e0, State, Data> t0; |
| typename Grammar::template impl<e1, State, Data> t1; |
| typename Grammar::template impl<e2, State, Data> t2; |
| return t0(proto::child_c<0>(e), s, d) |
| ? t1(proto::child_c<1>(e), s, d) |
| : t2(proto::child_c<2>(e), s, d); |
| } |
| }; |
| |
| template<typename Expr, typename State, typename Data> |
| struct impl2<Expr, State, Data, tag::comma, 2> |
| : transform_impl<Expr, State, Data> |
| { |
| private: |
| typedef typename result_of::child_c<Expr, 0>::type e0; |
| typedef typename result_of::child_c<Expr, 1>::type e1; |
| typedef typename Grammar::template impl<e0, State, Data>::result_type r0; |
| typedef typename Grammar::template impl<e1, State, Data>::result_type r1; |
| public: |
| typedef typename proto::detail::comma_result<r0, r1>::type result_type; |
| result_type operator ()( |
| typename impl2::expr_param e |
| , typename impl2::state_param s |
| , typename impl2::data_param d |
| ) const |
| { |
| typename Grammar::template impl<e0, State, Data> t0; |
| typename Grammar::template impl<e1, State, Data> t1; |
| return t0(proto::child_c<0>(e), s, d) |
| , t1(proto::child_c<1>(e), s, d); |
| } |
| }; |
| |
| #define EVAL_TYPE(Z, N, DATA) \ |
| typedef \ |
| typename result_of::child_c<DATA, N>::type \ |
| BOOST_PP_CAT(e, N); \ |
| typedef \ |
| typename Grammar::template impl<BOOST_PP_CAT(e, N), State, Data>::result_type \ |
| BOOST_PP_CAT(r, N); \ |
| /**/ |
| |
| #define EVAL(Z, N, DATA) \ |
| typename Grammar::template impl<BOOST_PP_CAT(e, N), State, Data>()( \ |
| proto::child_c<N>(DATA), s, d \ |
| ) \ |
| /**/ |
| |
| template<typename Expr, typename State, typename Data> |
| struct impl2<Expr, State, Data, tag::function, 1> |
| : transform_impl<Expr, State, Data> |
| { |
| EVAL_TYPE(~, 0, Expr) |
| |
| typedef |
| typename proto::detail::result_of_fixup<r0>::type |
| function_type; |
| |
| typedef |
| typename boost::result_of<function_type()>::type |
| result_type; |
| |
| result_type operator ()( |
| typename impl2::expr_param e |
| , typename impl2::state_param s |
| , typename impl2::data_param d |
| ) const |
| { |
| return EVAL(~, 0, e)(); |
| } |
| }; |
| |
| template<typename Expr, typename State, typename Data> |
| struct impl2<Expr, State, Data, tag::function, 2> |
| : transform_impl<Expr, State, Data> |
| { |
| EVAL_TYPE(~, 0, Expr) |
| EVAL_TYPE(~, 1, Expr) |
| |
| typedef |
| typename proto::detail::result_of_fixup<r0>::type |
| function_type; |
| |
| typedef |
| typename detail::result_of_<function_type(r1)>::type |
| result_type; |
| |
| result_type operator ()( |
| typename impl2::expr_param e |
| , typename impl2::state_param s |
| , typename impl2::data_param d |
| ) const |
| { |
| return this->invoke( |
| e |
| , s |
| , d |
| , is_member_function_pointer<function_type>() |
| , is_member_object_pointer<function_type>() |
| ); |
| } |
| |
| private: |
| result_type invoke( |
| typename impl2::expr_param e |
| , typename impl2::state_param s |
| , typename impl2::data_param d |
| , mpl::false_ |
| , mpl::false_ |
| ) const |
| { |
| return EVAL(~, 0, e)(EVAL(~, 1, e)); |
| } |
| |
| result_type invoke( |
| typename impl2::expr_param e |
| , typename impl2::state_param s |
| , typename impl2::data_param d |
| , mpl::true_ |
| , mpl::false_ |
| ) const |
| { |
| BOOST_PROTO_USE_GET_POINTER(); |
| typedef typename detail::classtypeof<function_type>::type class_type; |
| return (BOOST_PROTO_GET_POINTER(class_type, EVAL(~, 1, e)) ->* EVAL(~, 0, e))(); |
| } |
| |
| result_type invoke( |
| typename impl2::expr_param e |
| , typename impl2::state_param s |
| , typename impl2::data_param d |
| , mpl::false_ |
| , mpl::true_ |
| ) const |
| { |
| BOOST_PROTO_USE_GET_POINTER(); |
| typedef typename detail::classtypeof<function_type>::type class_type; |
| return (BOOST_PROTO_GET_POINTER(class_type, EVAL(~, 1, e)) ->* EVAL(~, 0, e)); |
| } |
| }; |
| |
| #define BOOST_PP_ITERATION_PARAMS_1 (3, (3, BOOST_PROTO_MAX_ARITY, <boost/proto/transform/default.hpp>)) |
| #include BOOST_PP_ITERATE() |
| |
| #undef EVAL_TYPE |
| #undef EVAL |
| |
| template<typename Expr, typename State, typename Data> |
| struct impl |
| : impl2< |
| Expr |
| , State |
| , Data |
| , typename transform_impl<Expr, State, Data>::expr::proto_tag |
| , transform_impl<Expr, State, Data>::expr::proto_arity_c |
| > |
| {}; |
| }; |
| |
| template<typename Grammar> |
| struct is_callable<_default<Grammar> > |
| : mpl::true_ |
| {}; |
| |
| namespace detail |
| { |
| // Loopy indirection that allows proto::_default<> to be |
| // used without specifying a Grammar argument. |
| struct _default |
| : proto::_default<> |
| {}; |
| } |
| |
| }} |
| |
| #endif |
| |
| #else |
| |
| #define N BOOST_PP_ITERATION() |
| |
| template<typename Expr, typename State, typename Data> |
| struct impl2<Expr, State, Data, tag::function, N> |
| : transform_impl<Expr, State, Data> |
| { |
| BOOST_PP_REPEAT(N, EVAL_TYPE, Expr) |
| |
| typedef |
| typename proto::detail::result_of_fixup<r0>::type |
| function_type; |
| |
| typedef |
| typename boost::result_of< |
| function_type(BOOST_PP_ENUM_SHIFTED_PARAMS(N, r)) |
| >::type |
| result_type; |
| |
| result_type operator ()( |
| typename impl2::expr_param e |
| , typename impl2::state_param s |
| , typename impl2::data_param d |
| ) const |
| { |
| return this->invoke(e, s, d, is_member_function_pointer<function_type>()); |
| } |
| |
| private: |
| result_type invoke( |
| typename impl2::expr_param e |
| , typename impl2::state_param s |
| , typename impl2::data_param d |
| , mpl::false_ |
| ) const |
| { |
| return EVAL(~, 0, e)(BOOST_PP_ENUM_SHIFTED(N, EVAL, e)); |
| } |
| |
| result_type invoke( |
| typename impl2::expr_param e |
| , typename impl2::state_param s |
| , typename impl2::data_param d |
| , mpl::true_ |
| ) const |
| { |
| #define M0(Z, M, e) BOOST_PP_COMMA_IF(BOOST_PP_SUB(M, 2)) EVAL(Z, M, e) |
| BOOST_PROTO_USE_GET_POINTER(); |
| typedef typename detail::classtypeof<function_type>::type class_type; |
| return (BOOST_PROTO_GET_POINTER(class_type, EVAL(~, 1, e)) ->* EVAL(~, 0, e))( |
| BOOST_PP_REPEAT_FROM_TO(2, N, M0, e) |
| ); |
| #undef M0 |
| } |
| }; |
| |
| #undef N |
| |
| #endif |
