boost/proto/detail/unpack_expr_.hpp
#if !defined(BOOST_PROTO_DONT_USE_PREPROCESSED_FILES)
#include <boost/proto/detail/preprocessed/unpack_expr_.hpp>
#elif !defined(BOOST_PP_IS_ITERATING)
/// INTERNAL ONLY
///
#define BOOST_PROTO_FUSION_NEXT_ITERATOR_TYPE(Z, N, DATA) \
typedef typename fusion::result_of::next< \
BOOST_PP_CAT(fusion_iterator, N)>::type \
BOOST_PP_CAT(fusion_iterator, BOOST_PP_INC(N)); \
/**/
/// INTERNAL ONLY
///
#define BOOST_PROTO_FUSION_ITERATORS_TYPE(N) \
typedef \
typename fusion::result_of::begin<Sequence const>::type \
fusion_iterator0; \
BOOST_PP_REPEAT(BOOST_PP_DEC(N), BOOST_PROTO_FUSION_NEXT_ITERATOR_TYPE, fusion_iterator) \
/**/
/// INTERNAL ONLY
///
#define BOOST_PROTO_FUSION_AT_TYPE(Z, N, DATA) \
typename add_const< \
typename fusion::result_of::value_of< \
BOOST_PP_CAT(fusion_iterator, N) \
>::type \
>::type \
/**/
/// INTERNAL ONLY
///
#define BOOST_PROTO_FUSION_NEXT_ITERATOR(Z, N, DATA) \
BOOST_PP_CAT(fusion_iterator, BOOST_PP_INC(N)) BOOST_PP_CAT(it, BOOST_PP_INC(N)) = \
fusion::next(BOOST_PP_CAT(it, N)); \
/**/
/// INTERNAL ONLY
///
#define BOOST_PROTO_FUSION_ITERATORS(N) \
fusion_iterator0 it0 = fusion::begin(sequence); \
BOOST_PP_REPEAT(BOOST_PP_DEC(N), BOOST_PROTO_FUSION_NEXT_ITERATOR, fusion_iterator) \
/**/
/// INTERNAL ONLY
///
#define BOOST_PROTO_FUSION_AT(Z, N, DATA) \
*BOOST_PP_CAT(it, N) \
/**/
/// INTERNAL ONLY
///
#define BOOST_PROTO_FUSION_AS_CHILD_AT_TYPE(Z, N, DATA) \
typename detail::protoify< \
BOOST_PROTO_FUSION_AT_TYPE(Z, N, DATA) \
, Domain \
>::result_type \
/**/
/// INTERNAL ONLY
///
#define BOOST_PROTO_FUSION_AS_CHILD_AT(Z, N, DATA) \
detail::protoify< \
BOOST_PROTO_FUSION_AT_TYPE(Z, N, DATA) \
, Domain \
>()(BOOST_PROTO_FUSION_AT(Z, N, DATA)) \
/**/
#if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
#pragma wave option(preserve: 2, line: 0, output: "preprocessed/unpack_expr_.hpp")
#endif
///////////////////////////////////////////////////////////////////////////////
/// \file make_expr_.hpp
/// Contains definition of make_expr_\<\> class template.
//
// 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)
#if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
#pragma wave option(preserve: 1)
#endif
template<typename Tag, typename Domain, typename Sequence, std::size_t Size>
struct unpack_expr_
{};
template<typename Domain, typename Sequence>
struct unpack_expr_<tag::terminal, Domain, Sequence, 1u>
{
typedef
typename add_const<
typename fusion::result_of::value_of<
typename fusion::result_of::begin<Sequence>::type
>::type
>::type
terminal_type;
typedef
typename proto::detail::protoify<
terminal_type
, Domain
>::result_type
type;
static type const call(Sequence const &sequence)
{
return proto::detail::protoify<terminal_type, Domain>()(fusion::at_c<0>(sequence));
}
};
template<typename Sequence>
struct unpack_expr_<tag::terminal, deduce_domain, Sequence, 1u>
: unpack_expr_<tag::terminal, default_domain, Sequence, 1u>
{};
#define BOOST_PP_ITERATION_PARAMS_1 \
(3, (1, BOOST_PROTO_MAX_ARITY, <boost/proto/detail/unpack_expr_.hpp>))
#include BOOST_PP_ITERATE()
#if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
#pragma wave option(output: null)
#endif
#undef BOOST_PROTO_FUSION_AT
#undef BOOST_PROTO_FUSION_AT_TYPE
#undef BOOST_PROTO_FUSION_AS_CHILD_AT
#undef BOOST_PROTO_FUSION_AS_CHILD_AT_TYPE
#undef BOOST_PROTO_FUSION_NEXT_ITERATOR
#undef BOOST_PROTO_FUSION_NEXT_ITERATOR_TYPE
#undef BOOST_PROTO_FUSION_ITERATORS
#undef BOOST_PROTO_FUSION_ITERATORS_TYPE
#else // BOOST_PP_IS_ITERATING
#define N BOOST_PP_ITERATION()
#define M BOOST_PP_SUB(BOOST_PROTO_MAX_ARITY, N)
template<typename Tag, typename Domain, typename Sequence>
struct unpack_expr_<Tag, Domain, Sequence, N>
{
BOOST_PROTO_FUSION_ITERATORS_TYPE(N)
typedef
BOOST_PP_CAT(list, N)<
BOOST_PP_ENUM(N, BOOST_PROTO_FUSION_AS_CHILD_AT_TYPE, ~)
>
proto_args;
typedef typename base_expr<Domain, Tag, proto_args>::type expr_type;
typedef typename Domain::proto_generator proto_generator;
typedef typename proto_generator::template result<proto_generator(expr_type)>::type type;
static type const call(Sequence const &sequence)
{
BOOST_PROTO_FUSION_ITERATORS(N)
expr_type const that = {
BOOST_PP_ENUM(N, BOOST_PROTO_FUSION_AS_CHILD_AT, ~)
};
return proto_generator()(that);
}
};
template<typename Tag, typename Sequence>
struct unpack_expr_<Tag, deduce_domain, Sequence, N>
{
BOOST_PROTO_FUSION_ITERATORS_TYPE(N)
typedef
unpack_expr_<
Tag
, typename BOOST_PP_CAT(deduce_domain, N)<
BOOST_PP_ENUM(N, BOOST_PROTO_FUSION_AT_TYPE, ~)
>::type
, Sequence
, N
>
other;
typedef typename other::type type;
static type const call(Sequence const &sequence)
{
return other::call(sequence);
}
};
#undef N
#undef M
#endif
