From b4133761e8dcd81e461f0b4c2e5d8029100d7b62 Mon Sep 17 00:00:00 2001
From: Kohei Takahashi <flast@flast.jp>
Date: Sat, 29 Nov 2014 23:04:29 +0900
Subject: [PATCH] Implement C++11 variadic templates based fusion::set

---
 .../fusion/container/set/detail/as_set.hpp    |  50 +++++++-
 .../container/set/detail/convert_impl.hpp     |   2 +-
 include/boost/fusion/container/set/set.hpp    | 111 ++++++++++++++++++
 .../boost/fusion/container/set/set_fwd.hpp    |  27 +++++
 4 files changed, 188 insertions(+), 2 deletions(-)

diff --git a/include/boost/fusion/container/set/detail/as_set.hpp b/include/boost/fusion/container/set/detail/as_set.hpp
index 1eb0d3fe..9d333258 100644
--- a/include/boost/fusion/container/set/detail/as_set.hpp
+++ b/include/boost/fusion/container/set/detail/as_set.hpp
@@ -1,5 +1,5 @@
 /*=============================================================================
-    Copyright (c) 2014 Kohei Takahashi
+    Copyright (c) 2014-2015 Kohei Takahashi
 
     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)
@@ -13,7 +13,55 @@
 ///////////////////////////////////////////////////////////////////////////////
 // Without variadics, we will use the PP version
 ///////////////////////////////////////////////////////////////////////////////
+#if !defined(BOOST_FUSION_HAS_VARIADIC_SET)
 # include <boost/fusion/container/set/detail/cpp03/as_set.hpp>
+#else
+
+///////////////////////////////////////////////////////////////////////////////
+// C++11 interface
+///////////////////////////////////////////////////////////////////////////////
+#include <boost/fusion/support/detail/index_sequence.hpp>
+#include <boost/fusion/container/set/set.hpp>
+#include <boost/fusion/iterator/value_of.hpp>
+#include <boost/fusion/iterator/deref.hpp>
+#include <boost/fusion/iterator/advance.hpp>
+#include <cstddef>
+
+namespace boost { namespace fusion { namespace detail
+{
+BOOST_FUSION_BARRIER_BEGIN
+
+    template <int size
+            , typename = typename detail::make_index_sequence<size>::type>
+    struct as_set;
+
+    template <int size, std::size_t ...Indices>
+    struct as_set<size, detail::index_sequence<Indices...> >
+    {
+        template <typename I>
+        struct apply
+        {
+            typedef set<
+                typename result_of::value_of<
+                    typename result_of::advance_c<I, Indices>::type
+                >::type...
+            > type;
+        };
+
+        template <typename Iterator>
+        BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+        static typename apply<Iterator>::type
+        call(Iterator const& i)
+        {
+            typedef apply<Iterator> gen;
+            typedef typename gen::type result;
+            return result(*advance_c<Indices>(i)...);
+        }
+    };
+
+BOOST_FUSION_BARRIER_END
+}}}
 
 #endif
+#endif
 
diff --git a/include/boost/fusion/container/set/detail/convert_impl.hpp b/include/boost/fusion/container/set/detail/convert_impl.hpp
index d9d5dcfc..0b4cb22f 100644
--- a/include/boost/fusion/container/set/detail/convert_impl.hpp
+++ b/include/boost/fusion/container/set/detail/convert_impl.hpp
@@ -29,7 +29,7 @@ namespace boost { namespace fusion
             template <typename Sequence>
             struct apply
             {
-                typedef typename detail::as_set<result_of::size<Sequence>::value> gen;
+                typedef detail::as_set<result_of::size<Sequence>::value> gen;
                 typedef typename gen::
                     template apply<typename result_of::begin<Sequence>::type>::type
                 type;
diff --git a/include/boost/fusion/container/set/set.hpp b/include/boost/fusion/container/set/set.hpp
index 59f4eafc..9e383619 100644
--- a/include/boost/fusion/container/set/set.hpp
+++ b/include/boost/fusion/container/set/set.hpp
@@ -13,8 +13,119 @@
 ///////////////////////////////////////////////////////////////////////////////
 // Without variadics, we will use the PP version
 ///////////////////////////////////////////////////////////////////////////////
+#if !defined(BOOST_FUSION_HAS_VARIADIC_SET)
 # include <boost/fusion/container/set/detail/cpp03/set.hpp>
+#else
 
+///////////////////////////////////////////////////////////////////////////////
+// C++11 interface
+///////////////////////////////////////////////////////////////////////////////
+#include <boost/fusion/support/detail/access.hpp>
+#include <boost/fusion/support/sequence_base.hpp>
+#include <boost/fusion/support/category_of.hpp>
+#include <boost/fusion/container/vector/vector.hpp>
+#include <boost/fusion/container/set/detail/begin_impl.hpp>
+#include <boost/fusion/container/set/detail/end_impl.hpp>
+#include <boost/fusion/container/set/detail/value_of_impl.hpp>
+#include <boost/fusion/container/set/detail/deref_data_impl.hpp>
+#include <boost/fusion/container/set/detail/deref_impl.hpp>
+#include <boost/fusion/container/set/detail/key_of_impl.hpp>
+#include <boost/fusion/container/set/detail/value_of_data_impl.hpp>
+#include <boost/mpl/identity.hpp>
+#include <boost/mpl/bool.hpp>
+
+namespace boost { namespace fusion
+{
+    struct fusion_sequence_tag;
+
+    template <>
+    struct set<> : sequence_base<set<> >
+    {
+        struct category : forward_traversal_tag, associative_tag {};
+
+        typedef set_tag fusion_tag;
+        typedef fusion_sequence_tag tag; // this gets picked up by MPL
+        typedef mpl::false_ is_view;
+
+        typedef vector<> storage_type;
+
+        typedef storage_type::size size;
+
+        BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+        set()
+            : data() {}
+
+        template <typename Sequence>
+        BOOST_FUSION_GPU_ENABLED
+        set(Sequence const& rhs)
+            : data(rhs) {}
+
+        template <typename T>
+        BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+        set&
+        operator=(T const& rhs)
+        {
+            data = rhs;
+            return *this;
+        }
+
+        BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+        storage_type& get_data() { return data; }
+        BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+        storage_type const& get_data() const { return data; }
+
+    private:
+        storage_type data;
+    };
+
+    template <typename ...T>
+    struct set : sequence_base<set<T...> >
+    {
+        struct category : forward_traversal_tag, associative_tag {};
+
+        typedef set_tag fusion_tag;
+        typedef fusion_sequence_tag tag; // this gets picked up by MPL
+        typedef mpl::false_ is_view;
+
+        typedef vector<T...> storage_type;
+
+        typedef typename storage_type::size size;
+
+        BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+        set()
+            : data() {}
+
+        template <typename Sequence>
+        BOOST_FUSION_GPU_ENABLED
+        set(Sequence const& rhs)
+            : data(rhs) {}
+
+        BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+        explicit
+        set(typename detail::call_param<T>::type ...args)
+            : data(args...) {}
+
+        template <typename U>
+        BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+        set&
+        operator=(U const& rhs)
+        {
+            data = rhs;
+            return *this;
+        }
+
+        BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+        storage_type& get_data() { return data; }
+        BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+        storage_type const& get_data() const { return data; }
+
+    private:
+        storage_type data;
+    };
+
+}}
+
+#endif
 #endif
 
 
diff --git a/include/boost/fusion/container/set/set_fwd.hpp b/include/boost/fusion/container/set/set_fwd.hpp
index 50d8d1c8..7b5d6830 100644
--- a/include/boost/fusion/container/set/set_fwd.hpp
+++ b/include/boost/fusion/container/set/set_fwd.hpp
@@ -9,11 +9,38 @@
 
 #include <boost/config.hpp>
 #include <boost/fusion/support/config.hpp>
+#include <boost/fusion/container/vector/detail/config.hpp>
+
+#if !defined(BOOST_FUSION_HAS_VARIADIC_VECTOR) \
+  || (defined(__WAVE__) && defined(BOOST_FUSION_CREATE_PREPROCESSED_FILES))
+# if defined(BOOST_FUSION_HAS_VARIADIC_SET)
+#   undef BOOST_FUSION_HAS_VARIADIC_SET
+# endif
+#else
+# if !defined(BOOST_FUSION_HAS_VARIADIC_SET)
+#   define BOOST_FUSION_HAS_VARIADIC_SET
+# endif
+#endif
 
 ///////////////////////////////////////////////////////////////////////////////
 // With no variadics, we will use the C++03 version
 ///////////////////////////////////////////////////////////////////////////////
+#if !defined(BOOST_FUSION_HAS_VARIADIC_SET)
 # include <boost/fusion/container/set/detail/cpp03/set_fwd.hpp>
+#else
+
+///////////////////////////////////////////////////////////////////////////////
+// C++11 interface
+///////////////////////////////////////////////////////////////////////////////
+namespace boost { namespace fusion
+{
+    struct set_tag;
+    struct set_iterator_tag;
+
+    template <typename ...T>
+    struct set;
+}}
 
 #endif
+#endif