1 files changed, 72 insertions, 0 deletions
diff --git a/boost/proto/transform/detail/pack_impl.hpp b/boost/proto/transform/detail/pack_impl.hpp
new file mode 100644
index 0000000000..d5f10afd23
--- /dev/null
+++ b/boost/proto/transform/detail/pack_impl.hpp
@@ -0,0 +1,72 @@
+#if !defined(BOOST_PROTO_DONT_USE_PREPROCESSED_FILES)
+
+    #include <boost/proto/transform/detail/preprocessed/pack_impl.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/pack_impl.hpp")
+    #endif
+
+    ///////////////////////////////////////////////////////////////////////////////
+    /// \file pack_impl.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_PP_DEC(BOOST_PROTO_MAX_ARITY), <boost/proto/transform/detail/pack_impl.hpp>))
+    #include BOOST_PP_ITERATE()
+
+    #if defined(__WAVE__) && defined(BOOST_PROTO_CREATE_PREPROCESSED_FILES)
+        #pragma wave option(output: null)
+    #endif
+
+#else
+    #if BOOST_PP_ITERATION_DEPTH() == 1
+        #define N BOOST_PP_ITERATION()
+        #define M BOOST_PP_SUB(BOOST_PROTO_MAX_ARITY, N)
+        #define M0(Z, X, D)  typename expand_pattern_helper<proto::_child_c<X>, Fun>::type
+
+        template<typename Fun, typename Cont>
+        struct expand_pattern<BOOST_PP_INC(N), Fun, Cont>
+          : Cont::template cat<BOOST_PP_ENUM(BOOST_PP_INC(N), M0, ~)>
+        {
+            BOOST_MPL_ASSERT_MSG(
+                (expand_pattern_helper<proto::_child_c<0>, Fun>::applied::value)
+              , NO_PACK_EXPRESSION_FOUND_IN_UNPACKING_PATTERN
+              , (Fun)
+            );
+        };
+
+        template<typename Ret BOOST_PP_ENUM_TRAILING_PARAMS(N, typename A)>
+        struct BOOST_PP_CAT(expand_pattern_rest_, N)
+        {
+            template<BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT(BOOST_PP_INC(M), typename C, void)>
+            struct cat;
+
+            #define BOOST_PP_ITERATION_PARAMS_2                                                     \
+                (3, (1, M, <boost/proto/transform/detail/pack_impl.hpp>))
+            #include BOOST_PP_ITERATE()
+        };
+        #undef M0
+        #undef M
+        #undef N
+    #else
+        #define I BOOST_PP_ITERATION()
+        #define J BOOST_PP_RELATIVE_ITERATION(1)
+            template<BOOST_PP_ENUM_PARAMS(I, typename C)>
+            struct cat<BOOST_PP_ENUM_PARAMS(I, C)>
+            {
+                typedef msvc_fun_workaround<Ret(BOOST_PP_ENUM_PARAMS(J, A) BOOST_PP_COMMA_IF(J) BOOST_PP_ENUM_PARAMS(I, C))> type;
+            };
+        #undef J
+        #undef I
+    #endif
+#endif