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