boost/proto/transform/detail/pass_through_impl.hpp
#if !defined(BOOST_PROTO_DONT_USE_PREPROCESSED_FILES)
#include <boost/proto/transform/detail/preprocessed/pass_through_impl.hpp>
#elif !defined(BOOST_PP_IS_ITERATING)
#define BOOST_PROTO_DEFINE_TRANSFORM_TYPE(Z, N, DATA) \
typename Grammar::BOOST_PP_CAT(proto_child, N)::template impl< \
typename result_of::child_c<Expr, N>::type \
, State \
, Data \
>::result_type \
/**/
#define BOOST_PROTO_DEFINE_TRANSFORM(Z, N, DATA) \
typename Grammar::BOOST_PP_CAT(proto_child, N)::template impl< \
typename result_of::child_c<Expr, N>::type \
, State \
, Data \
>()( \
e.proto_base().BOOST_PP_CAT(child, N), s, d \
) \
/**/
#if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
#pragma wave option(preserve: 2, line: 0, output: "preprocessed/pass_through_impl.hpp")
#endif
///////////////////////////////////////////////////////////////////////////////
/// \file pass_through_impl.hpp
///
/// Specializations of pass_through_impl, used in the implementation of the
/// pass_through transform.
//
// 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
#define BOOST_PP_ITERATION_PARAMS_1 (3, (1, BOOST_PROTO_MAX_ARITY, <boost/proto/transform/detail/pass_through_impl.hpp>))
#include BOOST_PP_ITERATE()
#if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
#pragma wave option(output: null)
#endif
#undef BOOST_PROTO_DEFINE_TRANSFORM
#undef BOOST_PROTO_DEFINE_TRANSFORM_TYPE
#else
#define N BOOST_PP_ITERATION()
template<typename Grammar, typename Expr, typename State, typename Data>
struct pass_through_impl<Grammar, Expr, State, Data, N>
: transform_impl<Expr, State, Data>
{
typedef typename pass_through_impl::expr unref_expr;
typedef
typename base_expr<
typename unref_expr::proto_domain
, typename unref_expr::proto_tag
, BOOST_PP_CAT(list, N)<
BOOST_PP_ENUM(N, BOOST_PROTO_DEFINE_TRANSFORM_TYPE, ~)
>
>::type
expr_type;
typedef typename unref_expr::proto_generator proto_generator;
typedef typename BOOST_PROTO_RESULT_OF<proto_generator(expr_type)>::type const result_type;
BOOST_FORCEINLINE
result_type const operator ()(
typename pass_through_impl::expr_param e
, typename pass_through_impl::state_param s
, typename pass_through_impl::data_param d
) const
{
expr_type const that = {
BOOST_PP_ENUM(N, BOOST_PROTO_DEFINE_TRANSFORM, ~)
};
// Without this, MSVC complains that "that" is uninitialized,
// and it actually triggers a runtime check in debug mode when
// built with VC8.
detail::ignore_unused(&that);
return proto_generator()(that);
}
};
#undef N
#endif