Initial Commit

2018-02-08 21:28:33 -05:00
commit 678c1d3966
14352 changed files with 3176737 additions and 0 deletions
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+/*=============================================================================
+    Copyright (c) 2001-2011 Joel de Guzman
+
+    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(FUSION_HAS_KEY_09232005_1454)
+#define FUSION_HAS_KEY_09232005_1454
+
+#include <boost/fusion/support/config.hpp>
+#include <boost/fusion/sequence/intrinsic_fwd.hpp>
+#include <boost/fusion/support/tag_of.hpp>
+#include <boost/fusion/iterator/equal_to.hpp>
+#include <boost/fusion/algorithm/query/find.hpp>
+#include <boost/fusion/sequence/intrinsic/end.hpp>
+#include <boost/mpl/not.hpp>
+
+namespace boost { namespace fusion
+{
+    struct void_;
+
+    // Special tags:
+    struct sequence_facade_tag;
+    struct boost_array_tag; // boost::array tag
+    struct mpl_sequence_tag; // mpl sequence tag
+    struct std_pair_tag; // std::pair tag
+
+    namespace extension
+    {
+        template <typename Tag>
+        struct has_key_impl
+        {
+            template <typename Seq, typename Key>
+            struct apply
+              : mpl::not_<
+                    typename result_of::equal_to<
+                        typename result_of::find<Seq, Key>::type
+                      , typename result_of::end<Seq>::type
+                    >::type
+                >::type
+            {};
+        };
+
+        template <>
+        struct has_key_impl<sequence_facade_tag>
+        {
+            template <typename Sequence, typename Key>
+            struct apply : Sequence::template has_key<Sequence, Key> {};
+        };
+
+        template <>
+        struct has_key_impl<boost_array_tag>;
+
+        template <>
+        struct has_key_impl<mpl_sequence_tag>;
+
+        template <>
+        struct has_key_impl<std_pair_tag>;
+    }
+    
+    namespace result_of
+    {
+        template <typename Sequence, typename Key>
+        struct has_key 
+            : extension::has_key_impl<typename detail::tag_of<Sequence>::type>::
+                template apply<Sequence, Key>
+        {};
+    }
+
+    template <typename Key, typename Sequence>
+    BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+    inline typename result_of::has_key<Sequence, Key>::type
+    has_key(Sequence const&)
+    {
+        typedef typename result_of::has_key<Sequence, Key>::type result;
+        return result();
+    }
+}}
+
+#endif
+