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#if !defined(BOOST_PROTO_DONT_USE_PREPROCESSED_FILES)
#include <boost/proto/transform/detail/preprocessed/call.hpp>
#elif !defined(BOOST_PP_IS_ITERATING)
#define BOOST_PROTO_NTH_RESULT_TYPE(Z, M, DATA) \
typedef \
typename when<_, BOOST_PP_CAT(A, M)>::template impl<Expr, State, Data> \
BOOST_PP_CAT(a, M); \
typedef typename BOOST_PP_CAT(a, M)::result_type BOOST_PP_CAT(b, M); \
/**/
#define BOOST_PROTO_NTH_RESULT(Z, M, DATA) \
detail::as_lvalue(BOOST_PP_CAT(a, M)()(e, s, d)) \
/**/
#if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
#pragma wave option(preserve: 2, line: 0, output: "preprocessed/call.hpp")
#endif
///////////////////////////////////////////////////////////////////////////////
/// \file call.hpp
/// Contains definition of the call<> 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/call.hpp>))
#include BOOST_PP_ITERATE()
#if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
#pragma wave option(output: null)
#endif
#undef BOOST_PROTO_NTH_RESULT
#undef BOOST_PROTO_NTH_RESULT_TYPE
#else
#define N BOOST_PP_ITERATION()
#if N > 3
/// \brief Call the PolymorphicFunctionObject \c Fun with the
/// current expression, state and data, transformed according
/// to \c A0 through \c AN.
template<typename Fun BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
struct call<Fun(BOOST_PP_ENUM_PARAMS(N, A))> : transform<call<Fun(BOOST_PP_ENUM_PARAMS(N, A))> >
{
template<typename Expr, typename State, typename Data>
struct impl : transform_impl<Expr, State, Data>
{
BOOST_PP_REPEAT(N, BOOST_PROTO_NTH_RESULT_TYPE, ~)
typedef detail::poly_function_traits<Fun, Fun(BOOST_PP_ENUM_PARAMS(N, b))> function_traits;
typedef typename function_traits::result_type result_type;
/// Let \c ax be <tt>when\<_, Ax\>()(e, s, d)</tt>
/// for each \c x in <tt>[0,N]</tt>.
/// Return <tt>Fun()(a0, a1,... aN)</tt>.
///
/// \param e The current expression
/// \param s The current state
/// \param d An arbitrary data
BOOST_FORCEINLINE
result_type operator ()(
typename impl::expr_param e
, typename impl::state_param s
, typename impl::data_param d
) const
{
typedef typename function_traits::function_type function_type;
return function_type()(BOOST_PP_ENUM(N, BOOST_PROTO_NTH_RESULT, ~));
}
};
};
#endif
#if N > 0
/// \brief Call the PolymorphicFunctionObject \c Fun with the
/// current expression, state and data, transformed according
/// to \c A0 through \c AN.
template<typename Fun BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
struct call<Fun(BOOST_PP_ENUM_PARAMS(N, A)...)> : transform<call<Fun(BOOST_PP_ENUM_PARAMS(N, A)...)> >
{
template<typename Expr, typename State, typename Data>
struct impl
: call<
typename detail::expand_pattern<
proto::arity_of<Expr>::value // BUGBUG this isn't right. Could be pack(_child), should use arity of child!
, BOOST_PP_CAT(A, BOOST_PP_DEC(N))
, detail::BOOST_PP_CAT(expand_pattern_rest_, BOOST_PP_DEC(N))<
Fun
BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_DEC(N), A)
>
>::type
>::template impl<Expr, State, Data>
{};
};
#endif
#undef N
#endif
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Swift