Chris@16: #if !defined(BOOST_PROTO_DONT_USE_PREPROCESSED_FILES)
Chris@16: 
Chris@16:     #include <boost/proto/transform/detail/preprocessed/expand_pack.hpp>
Chris@16: 
Chris@16: #elif !defined(BOOST_PP_IS_ITERATING)
Chris@16: 
Chris@16:     #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
Chris@16:         #pragma wave option(preserve: 2, line: 0, output: "preprocessed/expand_pack.hpp")
Chris@16:     #endif
Chris@16: 
Chris@16:     ///////////////////////////////////////////////////////////////////////////////
Chris@16:     /// \file expand_pack.hpp
Chris@16:     /// Contains helpers for pseudo-pack expansion.
Chris@16:     //
Chris@16:     //  Copyright 2012 Eric Niebler. Distributed under the Boost
Chris@16:     //  Software License, Version 1.0. (See accompanying file
Chris@16:     //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16:     #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
Chris@16:         #pragma wave option(preserve: 1)
Chris@16:     #endif
Chris@16: 
Chris@16:     #define BOOST_PP_ITERATION_PARAMS_1                                                             \
Chris@16:         (3, (0, BOOST_PROTO_MAX_ARITY, <boost/proto/transform/detail/expand_pack.hpp>))
Chris@16:     #include BOOST_PP_ITERATE()
Chris@16: 
Chris@16:     #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
Chris@16:         #pragma wave option(output: null)
Chris@16:     #endif
Chris@16: 
Chris@16: #else
Chris@16:     #define N BOOST_PP_ITERATION()
Chris@16:     #define M0(Z, X, DATA) typename expand_pattern_helper<Tfx, BOOST_PP_CAT(A, X)>::type
Chris@16:     #define M1(Z, X, DATA) expand_pattern_helper<Tfx, BOOST_PP_CAT(A, X)>::applied::value ||
Chris@16: 
Chris@16:         template<typename Tfx, typename Ret BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
Chris@16:         struct expand_pattern_helper<Tfx, Ret(BOOST_PP_ENUM_PARAMS(N, A))>
Chris@16:         {
Chris@16:             typedef Ret (*type)(BOOST_PP_ENUM(N, M0, ~));
Chris@16:             typedef mpl::bool_<BOOST_PP_REPEAT(N, M1, ~) false> applied;
Chris@16:         };
Chris@16: 
Chris@16:     #undef M1
Chris@16:     #undef M0
Chris@16:     #undef N
Chris@16: #endif