boost/proto/transform/default.hpp
#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/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>
namespace boost { namespace proto
{
template<typename Grammar /*= 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
