[identity_view] Added boost::fusion::identity_view

2022-01-10 21:19:38 +04:00
parent 438d4d1874
commit eed79cb557
11 changed files with 303 additions and 0 deletions
@@ -0,0 +1,12 @@
+/*=============================================================================
+    Copyright (c) 2022 Denis Mikhailov
+    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_INCLUDE_IDENTITY_VIEW)
+#define FUSION_INCLUDE_IDENTITY_VIEW
+
+#include <boost/fusion/support/config.hpp>
+#include <boost/fusion/view/identity_view.hpp>
+
+#endif
@@ -17,5 +17,6 @@
 #include <boost/fusion/view/transform_view.hpp>
 #include <boost/fusion/view/zip_view.hpp>
 #include <boost/fusion/view/flatten_view.hpp>
+#include <boost/fusion/view/identity_view.hpp>

 #endif
@@ -0,0 +1,14 @@
+/*=============================================================================
+    Copyright (c) 2022 Denis Mikhailov
+    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(BOOST_FUSION_SEQUENCE_IDENTITY_VIEW_HPP_INCLUDED)
+#define BOOST_FUSION_SEQUENCE_IDENTITY_VIEW_HPP_INCLUDED
+
+#include <boost/fusion/support/config.hpp>
+#include <boost/fusion/view/identity_view/identity_view.hpp>
+
+
+#endif
@@ -0,0 +1,27 @@
+/*=============================================================================
+    Copyright (c) 2022 Denis Mikhailov
+    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(BOOST_FUSION_IDENTITY_VIEW_HPP_INCLUDED)
+#define BOOST_FUSION_IDENTITY_VIEW_HPP_INCLUDED
+
+#include <boost/fusion/support/config.hpp>
+#include <boost/fusion/view/transform_view.hpp>
+#include <boost/functional/identity.hpp>
+
+namespace boost { namespace fusion {
+    template<typename Sequence> struct identity_view 
+        : transform_view<Sequence, boost::identity>
+    {
+        typedef transform_view<Sequence, boost::identity> base_type;
+
+        BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
+        identity_view(Sequence& in_seq)
+            : base_type(in_seq, boost::identity()) {}
+    };
+
+}}
+
+#endif