599 lines
28 KiB
C++
599 lines
28 KiB
C++
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///////////////////////////////////////////////////////////////////////////////
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/// \file default.hpp
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/// Contains definition of the _default transform, which gives operators their
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/// usual C++ meanings and uses Boost.Typeof to deduce return types.
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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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#ifndef BOOST_PROTO_TRANSFORM_DEFAULT_HPP_EAN_04_04_2008
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#define BOOST_PROTO_TRANSFORM_DEFAULT_HPP_EAN_04_04_2008
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#include <boost/preprocessor/iteration/iterate.hpp>
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#include <boost/preprocessor/repetition/repeat.hpp>
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#include <boost/preprocessor/arithmetic/add.hpp>
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#include <boost/preprocessor/arithmetic/sub.hpp>
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#include <boost/preprocessor/repetition/enum.hpp>
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#include <boost/preprocessor/repetition/enum_shifted.hpp>
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#include <boost/preprocessor/repetition/enum_shifted_params.hpp>
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#include <boost/ref.hpp>
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#include <boost/get_pointer.hpp>
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#include <boost/utility/enable_if.hpp>
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#include <boost/type_traits/is_member_pointer.hpp>
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#include <boost/type_traits/is_member_object_pointer.hpp>
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#include <boost/type_traits/is_member_function_pointer.hpp>
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#include <boost/proto/proto_fwd.hpp>
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#include <boost/proto/traits.hpp>
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#include <boost/proto/transform/impl.hpp>
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#include <boost/proto/transform/arg.hpp>
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#include <boost/proto/detail/decltype.hpp>
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namespace boost { namespace proto
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{
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namespace detail
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{
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template<typename Grammar, typename Tag>
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struct default_case
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: not_<_>
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{};
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template<typename Grammar>
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struct default_case<Grammar, tag::terminal>
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: when<terminal<_>, _value>
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{};
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template<typename Grammar>
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struct default_cases
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{
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template<typename Tag>
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struct case_
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: default_case<Grammar, Tag>
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{};
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};
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#define BOOST_PROTO_UNARY_DEFAULT_EVAL(OP, TAG, MAKE) \
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template<typename Grammar> \
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struct BOOST_PP_CAT(default_, TAG) \
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: transform<BOOST_PP_CAT(default_, TAG)<Grammar> > \
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{ \
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template<typename Expr, typename State, typename Data> \
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struct impl \
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: transform_impl<Expr, State, Data> \
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{ \
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private: \
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typedef typename result_of::child_c<Expr, 0>::type e0; \
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typedef typename Grammar::template impl<e0, State, Data>::result_type r0; \
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public: \
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BOOST_PROTO_DECLTYPE_(OP proto::detail::MAKE<r0>(), result_type) \
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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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typename Grammar::template impl<e0, State, Data> t0; \
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return OP t0(proto::child_c<0>(e), s, d); \
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} \
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}; \
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}; \
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\
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template<typename Grammar> \
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struct default_case<Grammar, tag::TAG> \
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: when<unary_expr<tag::TAG, Grammar>, BOOST_PP_CAT(default_, TAG)<Grammar> > \
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{}; \
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/**/
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#define BOOST_PROTO_BINARY_DEFAULT_EVAL(OP, TAG, LMAKE, RMAKE) \
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template<typename Grammar> \
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struct BOOST_PP_CAT(default_, TAG) \
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: transform<BOOST_PP_CAT(default_, TAG)<Grammar> > \
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{ \
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template<typename Expr, typename State, typename Data> \
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struct impl \
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: transform_impl<Expr, State, Data> \
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{ \
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private: \
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typedef typename result_of::child_c<Expr, 0>::type e0; \
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typedef typename result_of::child_c<Expr, 1>::type e1; \
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typedef typename Grammar::template impl<e0, State, Data>::result_type r0; \
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typedef typename Grammar::template impl<e1, State, Data>::result_type r1; \
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public: \
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BOOST_PROTO_DECLTYPE_( \
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proto::detail::LMAKE<r0>() OP proto::detail::RMAKE<r1>() \
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, result_type \
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) \
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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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typename Grammar::template impl<e0, State, Data> t0; \
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typename Grammar::template impl<e1, State, Data> t1; \
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return t0(proto::child_c<0>(e), s, d) \
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OP t1(proto::child_c<1>(e), s, d); \
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} \
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}; \
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}; \
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\
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template<typename Grammar> \
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struct default_case<Grammar, tag::TAG> \
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: when<binary_expr<tag::TAG, Grammar, Grammar>, BOOST_PP_CAT(default_, TAG)<Grammar> > \
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{}; \
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/**/
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BOOST_PROTO_UNARY_DEFAULT_EVAL(+, unary_plus, make)
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BOOST_PROTO_UNARY_DEFAULT_EVAL(-, negate, make)
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BOOST_PROTO_UNARY_DEFAULT_EVAL(*, dereference, make)
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BOOST_PROTO_UNARY_DEFAULT_EVAL(~, complement, make)
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BOOST_PROTO_UNARY_DEFAULT_EVAL(&, address_of, make)
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BOOST_PROTO_UNARY_DEFAULT_EVAL(!, logical_not, make)
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BOOST_PROTO_UNARY_DEFAULT_EVAL(++, pre_inc, make_mutable)
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BOOST_PROTO_UNARY_DEFAULT_EVAL(--, pre_dec, make_mutable)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(<<, shift_left, make_mutable, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(>>, shift_right, make_mutable, make_mutable)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(*, multiplies, make, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(/, divides, make, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(%, modulus, make, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(+, plus, make, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(-, minus, make, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(<, less, make, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(>, greater, make, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(<=, less_equal, make, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(>=, greater_equal, make, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(==, equal_to, make, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(!=, not_equal_to, make, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(||, logical_or, make, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(&&, logical_and, make, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(&, bitwise_and, make, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(|, bitwise_or, make, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(^, bitwise_xor, make, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(=, assign, make_mutable, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(<<=, shift_left_assign, make_mutable, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(>>=, shift_right_assign, make_mutable, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(*=, multiplies_assign, make_mutable, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(/=, divides_assign, make_mutable, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(%=, modulus_assign, make_mutable, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(+=, plus_assign, make_mutable, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(-=, minus_assign, make_mutable, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(&=, bitwise_and_assign, make_mutable, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(|=, bitwise_or_assign, make_mutable, make)
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BOOST_PROTO_BINARY_DEFAULT_EVAL(^=, bitwise_xor_assign, make_mutable, make)
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#undef BOOST_PROTO_UNARY_DEFAULT_EVAL
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#undef BOOST_PROTO_BINARY_DEFAULT_EVAL
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/// INTERNAL ONLY
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template<typename Grammar, typename Expr, typename State, typename Data>
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struct is_member_function_invocation
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: is_member_function_pointer<
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typename uncvref<
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typename Grammar::template impl<
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typename result_of::child_c<Expr, 1>::type
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, State
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, Data
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>::result_type
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>::type
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>
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{};
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/// INTERNAL ONLY
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template<typename Grammar, typename Expr, typename State, typename Data, bool IsMemFunCall>
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struct default_mem_ptr_impl
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: transform_impl<Expr, State, Data>
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{
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private:
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typedef typename result_of::child_c<Expr, 0>::type e0;
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typedef typename result_of::child_c<Expr, 1>::type e1;
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typedef typename Grammar::template impl<e0, State, Data>::result_type r0;
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typedef typename Grammar::template impl<e1, State, Data>::result_type r1;
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public:
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typedef typename detail::mem_ptr_fun<r0, r1>::result_type result_type;
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result_type operator ()(
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typename default_mem_ptr_impl::expr_param e
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, typename default_mem_ptr_impl::state_param s
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, typename default_mem_ptr_impl::data_param d
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) const
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{
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typename Grammar::template impl<e0, State, Data> t0;
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typename Grammar::template impl<e1, State, Data> t1;
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return detail::mem_ptr_fun<r0, r1>()(
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t0(proto::child_c<0>(e), s, d)
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, t1(proto::child_c<1>(e), s, d)
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);
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}
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};
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/// INTERNAL ONLY
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template<typename Grammar, typename Expr, typename State, typename Data>
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struct default_mem_ptr_impl<Grammar, Expr, State, Data, true>
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: transform_impl<Expr, State, Data>
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{
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private:
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typedef typename result_of::child_c<Expr, 0>::type e0;
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typedef typename result_of::child_c<Expr, 1>::type e1;
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typedef typename Grammar::template impl<e0, State, Data>::result_type r0;
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typedef typename Grammar::template impl<e1, State, Data>::result_type r1;
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public:
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typedef detail::memfun<r0, r1> result_type;
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result_type const operator ()(
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typename default_mem_ptr_impl::expr_param e
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, typename default_mem_ptr_impl::state_param s
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, typename default_mem_ptr_impl::data_param d
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) const
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{
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typename Grammar::template impl<e0, State, Data> t0;
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typename Grammar::template impl<e1, State, Data> t1;
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return detail::memfun<r0, r1>(
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t0(proto::child_c<0>(e), s, d)
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, t1(proto::child_c<1>(e), s, d)
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);
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}
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};
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template<typename Grammar>
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struct default_mem_ptr
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: transform<default_mem_ptr<Grammar> >
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{
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template<typename Expr, typename State, typename Data>
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struct impl
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: default_mem_ptr_impl<
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Grammar
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, Expr
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, State
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, Data
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, is_member_function_invocation<Grammar, Expr, State, Data>::value
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>
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{};
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};
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template<typename Grammar>
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struct default_case<Grammar, tag::mem_ptr>
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: when<mem_ptr<Grammar, Grammar>, default_mem_ptr<Grammar> >
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{};
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template<typename Grammar>
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struct default_post_inc
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: transform<default_post_inc<Grammar> >
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{
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template<typename Expr, typename State, typename Data>
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struct impl
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: transform_impl<Expr, State, Data>
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{
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private:
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typedef typename result_of::child_c<Expr, 0>::type e0;
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typedef typename Grammar::template impl<e0, State, Data>::result_type r0;
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public:
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BOOST_PROTO_DECLTYPE_(proto::detail::make_mutable<r0>() ++, result_type)
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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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typename Grammar::template impl<e0, State, Data> t0;
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return t0(proto::child_c<0>(e), s, d) ++;
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}
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};
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};
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template<typename Grammar>
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struct default_case<Grammar, tag::post_inc>
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: when<post_inc<Grammar>, default_post_inc<Grammar> >
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{};
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template<typename Grammar>
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struct default_post_dec
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: transform<default_post_dec<Grammar> >
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{
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template<typename Expr, typename State, typename Data>
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struct impl
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: transform_impl<Expr, State, Data>
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{
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private:
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typedef typename result_of::child_c<Expr, 0>::type e0;
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typedef typename Grammar::template impl<e0, State, Data>::result_type r0;
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public:
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BOOST_PROTO_DECLTYPE_(proto::detail::make_mutable<r0>() --, result_type)
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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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typename Grammar::template impl<e0, State, Data> t0;
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return t0(proto::child_c<0>(e), s, d) --;
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}
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};
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};
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template<typename Grammar>
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struct default_case<Grammar, tag::post_dec>
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: when<post_dec<Grammar>, default_post_dec<Grammar> >
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{};
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template<typename Grammar>
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struct default_subscript
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: transform<default_subscript<Grammar> >
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{
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template<typename Expr, typename State, typename Data>
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struct impl
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: transform_impl<Expr, State, Data>
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{
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private:
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typedef typename result_of::child_c<Expr, 0>::type e0;
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typedef typename result_of::child_c<Expr, 1>::type e1;
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typedef typename Grammar::template impl<e0, State, Data>::result_type r0;
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typedef typename Grammar::template impl<e1, State, Data>::result_type r1;
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public:
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BOOST_PROTO_DECLTYPE_(
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proto::detail::make_subscriptable<r0>() [ proto::detail::make<r1>() ]
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, result_type
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)
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result_type operator ()(
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typename impl::expr_param e
|
||
|
|
, typename impl::state_param s
|
||
|
|
, typename impl::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 Grammar>
|
||
|
|
struct default_case<Grammar, tag::subscript>
|
||
|
|
: when<subscript<Grammar, Grammar>, default_subscript<Grammar> >
|
||
|
|
{};
|
||
|
|
|
||
|
|
template<typename Grammar>
|
||
|
|
struct default_if_else_
|
||
|
|
{
|
||
|
|
template<typename Expr, typename State, typename Data>
|
||
|
|
struct 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 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 impl::expr_param e
|
||
|
|
, typename impl::state_param s
|
||
|
|
, typename impl::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 Grammar>
|
||
|
|
struct default_case<Grammar, tag::if_else_>
|
||
|
|
: when<if_else_<Grammar, Grammar, Grammar>, default_if_else_<Grammar> >
|
||
|
|
{};
|
||
|
|
|
||
|
|
template<typename Grammar>
|
||
|
|
struct default_comma
|
||
|
|
: transform<default_comma<Grammar> >
|
||
|
|
{
|
||
|
|
template<typename Expr, typename State, typename Data>
|
||
|
|
struct 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 proto::detail::comma_result<r0, r1>::type result_type;
|
||
|
|
result_type operator ()(
|
||
|
|
typename impl::expr_param e
|
||
|
|
, typename impl::state_param s
|
||
|
|
, typename impl::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 Grammar>
|
||
|
|
struct default_case<Grammar, tag::comma>
|
||
|
|
: when<comma<Grammar, Grammar>, default_comma<Grammar> >
|
||
|
|
{};
|
||
|
|
|
||
|
|
template<typename Grammar, typename Expr, typename State, typename Data, long Arity>
|
||
|
|
struct default_function_impl;
|
||
|
|
|
||
|
|
template<typename Grammar>
|
||
|
|
struct default_function
|
||
|
|
: transform<default_function<Grammar> >
|
||
|
|
{
|
||
|
|
template<typename Expr, typename State, typename Data>
|
||
|
|
struct impl
|
||
|
|
: default_function_impl<
|
||
|
|
Grammar
|
||
|
|
, Expr
|
||
|
|
, State
|
||
|
|
, Data
|
||
|
|
, transform_impl<Expr, State, Data>::expr::proto_arity_c
|
||
|
|
>
|
||
|
|
{};
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename Grammar>
|
||
|
|
struct default_case<Grammar, tag::function>
|
||
|
|
: when<function<Grammar, vararg<Grammar> >, default_function<Grammar> >
|
||
|
|
{};
|
||
|
|
|
||
|
|
#define BOOST_PROTO_DEFAULT_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 BOOST_PROTO_DEFAULT_EVAL(Z, N, DATA) \
|
||
|
|
typename Grammar::template impl<BOOST_PP_CAT(e, N), State, Data>()( \
|
||
|
|
proto::child_c<N>(DATA), s, d \
|
||
|
|
) \
|
||
|
|
/**/
|
||
|
|
|
||
|
|
template<typename Grammar, typename Expr, typename State, typename Data>
|
||
|
|
struct default_function_impl<Grammar, Expr, State, Data, 1>
|
||
|
|
: transform_impl<Expr, State, Data>
|
||
|
|
{
|
||
|
|
BOOST_PROTO_DEFAULT_EVAL_TYPE(~, 0, Expr)
|
||
|
|
|
||
|
|
typedef
|
||
|
|
typename proto::detail::result_of_fixup<r0>::type
|
||
|
|
function_type;
|
||
|
|
|
||
|
|
typedef
|
||
|
|
typename BOOST_PROTO_RESULT_OF<function_type()>::type
|
||
|
|
result_type;
|
||
|
|
|
||
|
|
result_type operator ()(
|
||
|
|
typename default_function_impl::expr_param e
|
||
|
|
, typename default_function_impl::state_param s
|
||
|
|
, typename default_function_impl::data_param d
|
||
|
|
) const
|
||
|
|
{
|
||
|
|
return BOOST_PROTO_DEFAULT_EVAL(~, 0, e)();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename Grammar, typename Expr, typename State, typename Data>
|
||
|
|
struct default_function_impl<Grammar, Expr, State, Data, 2>
|
||
|
|
: transform_impl<Expr, State, Data>
|
||
|
|
{
|
||
|
|
BOOST_PROTO_DEFAULT_EVAL_TYPE(~, 0, Expr)
|
||
|
|
BOOST_PROTO_DEFAULT_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 default_function_impl::expr_param e
|
||
|
|
, typename default_function_impl::state_param s
|
||
|
|
, typename default_function_impl::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 default_function_impl::expr_param e
|
||
|
|
, typename default_function_impl::state_param s
|
||
|
|
, typename default_function_impl::data_param d
|
||
|
|
, mpl::false_
|
||
|
|
, mpl::false_
|
||
|
|
) const
|
||
|
|
{
|
||
|
|
return BOOST_PROTO_DEFAULT_EVAL(~, 0, e)(BOOST_PROTO_DEFAULT_EVAL(~, 1, e));
|
||
|
|
}
|
||
|
|
|
||
|
|
result_type invoke(
|
||
|
|
typename default_function_impl::expr_param e
|
||
|
|
, typename default_function_impl::state_param s
|
||
|
|
, typename default_function_impl::data_param d
|
||
|
|
, mpl::true_
|
||
|
|
, mpl::false_
|
||
|
|
) const
|
||
|
|
{
|
||
|
|
BOOST_PROTO_USE_GET_POINTER();
|
||
|
|
typedef typename detail::class_member_traits<function_type>::class_type class_type;
|
||
|
|
return (
|
||
|
|
BOOST_PROTO_GET_POINTER(class_type, (BOOST_PROTO_DEFAULT_EVAL(~, 1, e))) ->*
|
||
|
|
BOOST_PROTO_DEFAULT_EVAL(~, 0, e)
|
||
|
|
)();
|
||
|
|
}
|
||
|
|
|
||
|
|
result_type invoke(
|
||
|
|
typename default_function_impl::expr_param e
|
||
|
|
, typename default_function_impl::state_param s
|
||
|
|
, typename default_function_impl::data_param d
|
||
|
|
, mpl::false_
|
||
|
|
, mpl::true_
|
||
|
|
) const
|
||
|
|
{
|
||
|
|
BOOST_PROTO_USE_GET_POINTER();
|
||
|
|
typedef typename detail::class_member_traits<function_type>::class_type class_type;
|
||
|
|
return (
|
||
|
|
BOOST_PROTO_GET_POINTER(class_type, (BOOST_PROTO_DEFAULT_EVAL(~, 1, e))) ->*
|
||
|
|
BOOST_PROTO_DEFAULT_EVAL(~, 0, e)
|
||
|
|
);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
#include <boost/proto/transform/detail/default_function_impl.hpp>
|
||
|
|
|
||
|
|
#undef BOOST_PROTO_DEFAULT_EVAL_TYPE
|
||
|
|
#undef BOOST_PROTO_DEFAULT_EVAL
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename Grammar /*= detail::_default*/>
|
||
|
|
struct _default
|
||
|
|
: switch_<detail::default_cases<Grammar> >
|
||
|
|
{};
|
||
|
|
|
||
|
|
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
|
||
|
|
|