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- #if !defined(BOOST_PROTO_DONT_USE_PREPROCESSED_FILES)
- #include <boost/proto/transform/detail/preprocessed/expand_pack.hpp>
- #elif !defined(BOOST_PP_IS_ITERATING)
- #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
- #pragma wave option(preserve: 2, line: 0, output: "preprocessed/expand_pack.hpp")
- #endif
- ///////////////////////////////////////////////////////////////////////////////
- /// \file expand_pack.hpp
- /// Contains helpers for pseudo-pack expansion.
- //
- // Copyright 2012 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, (0, BOOST_PROTO_MAX_ARITY, <boost/proto/transform/detail/expand_pack.hpp>))
- #include BOOST_PP_ITERATE()
- #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
- #pragma wave option(output: null)
- #endif
- #else
- #define N BOOST_PP_ITERATION()
- #define M0(Z, X, DATA) typename expand_pattern_helper<Tfx, BOOST_PP_CAT(A, X)>::type
- #define M1(Z, X, DATA) expand_pattern_helper<Tfx, BOOST_PP_CAT(A, X)>::applied::value ||
- template<typename Tfx, typename Ret BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
- struct expand_pattern_helper<Tfx, Ret(BOOST_PP_ENUM_PARAMS(N, A))>
- {
- typedef Ret (*type)(BOOST_PP_ENUM(N, M0, ~));
- typedef mpl::bool_<BOOST_PP_REPEAT(N, M1, ~) false> applied;
- };
- #undef M1
- #undef M0
- #undef N
- #endif
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