1 #if !defined(BOOST_PROTO_DONT_USE_PREPROCESSED_FILES)
2 
3     #include <boost/proto/transform/detail/preprocessed/expand_pack.hpp>
4 
5 #elif !defined(BOOST_PP_IS_ITERATING)
6 
7     #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
8         #pragma wave option(preserve: 2, line: 0, output: "preprocessed/expand_pack.hpp")
9     #endif
10 
11     ///////////////////////////////////////////////////////////////////////////////
12     /// \file expand_pack.hpp
13     /// Contains helpers for pseudo-pack expansion.
14     //
15     //  Copyright 2012 Eric Niebler. Distributed under the Boost
16     //  Software License, Version 1.0. (See accompanying file
17     //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
18 
19     #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
20         #pragma wave option(preserve: 1)
21     #endif
22 
23     #define BOOST_PP_ITERATION_PARAMS_1                                                             \
24         (3, (0, BOOST_PROTO_MAX_ARITY, <boost/proto/transform/detail/expand_pack.hpp>))
25     #include BOOST_PP_ITERATE()
26 
27     #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
28         #pragma wave option(output: null)
29     #endif
30 
31 #else
32     #define N BOOST_PP_ITERATION()
33     #define M0(Z, X, DATA) typename expand_pattern_helper<Tfx, BOOST_PP_CAT(A, X)>::type
34     #define M1(Z, X, DATA) expand_pattern_helper<Tfx, BOOST_PP_CAT(A, X)>::applied::value ||
35 
36         template<typename Tfx, typename Ret BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
37         struct expand_pattern_helper<Tfx, Ret(BOOST_PP_ENUM_PARAMS(N, A))>
38         {
39             typedef Ret (*type)(BOOST_PP_ENUM(N, M0, ~));
40             typedef mpl::bool_<BOOST_PP_REPEAT(N, M1, ~) false> applied;
41         };
42 
43     #undef M1
44     #undef M0
45     #undef N
46 #endif
47