Initial Commit

2018-02-08 21:28:33 -05:00
commit 678c1d3966
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+/*=============================================================================
+    Copyright (c) 2003 Jonathan de Halleux (dehalleux@pelikhan.com)
+    http://spirit.sourceforge.net/
+
+  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)
+=============================================================================*/
+#ifndef BOOST_SPIRIT_ACTOR_SWAP_ACTOR_HPP
+#define BOOST_SPIRIT_ACTOR_SWAP_ACTOR_HPP
+
+#include <boost/spirit/home/classic/namespace.hpp>
+#include <boost/spirit/home/classic/actor/ref_value_actor.hpp>
+
+namespace boost { namespace spirit {
+
+BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN
+
+    ///////////////////////////////////////////////////////////////////////////
+    //  Summary:
+    //  A semantic action policy that swaps values.
+    //  (This doc uses convention available in actors.hpp)
+    //
+    //  Actions (what it does):
+    //      ref.swap( value_ref );
+    //
+    //  Policy name:
+    //      swap_action
+    //
+    //  Policy holder, corresponding helper method:
+    //      ref_value_actor, swap_a( ref );
+    //      ref_const_ref_actor, swap_a( ref, value_ref );
+    //
+    //  () operators: both
+    //
+    //  See also ref_value_actor and ref_const_ref_actor for more details.
+    ///////////////////////////////////////////////////////////////////////////
+    template<
+        typename T
+    >
+    class swap_actor
+    {
+    private:
+        T& ref;
+        T& swap_ref;
+
+    public:
+        swap_actor(
+            T& ref_,
+            T& swap_ref_)
+            : ref(ref_), swap_ref(swap_ref_)
+        {};
+
+        template<typename T2>
+        void operator()(T2 const& /*val*/) const
+        {
+            ref.swap(swap_ref);
+        }
+
+
+        template<typename IteratorT>
+        void operator()(
+            IteratorT const& /*first*/,
+            IteratorT const& /*last*/
+            ) const
+        {
+            ref.swap(swap_ref);
+        }
+    };
+
+    template<
+        typename T
+    >
+    inline swap_actor<T> swap_a(
+        T& ref_,
+        T& swap_ref_
+    )
+    {
+        return swap_actor<T>(ref_,swap_ref_);
+    }
+
+BOOST_SPIRIT_CLASSIC_NAMESPACE_END
+
+}}
+
+#endif