comparison DEPENDENCIES/generic/include/boost/phoenix/object/dynamic_cast.hpp @ 16:2665513ce2d3

Add boost headers

+/*==============================================================================
+    Copyright (c) 2001-2010 Joel de Guzman
+    Copyright (c) 2010 Thomas Heller
+
+    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_PHOENIX_OBJECT_DYNAMIC_CAST_HPP
+#define BOOST_PHOENIX_OBJECT_DYNAMIC_CAST_HPP
+
+#include <boost/phoenix/core/limits.hpp>
+#include <boost/phoenix/core/call.hpp>
+#include <boost/phoenix/core/expression.hpp>
+#include <boost/phoenix/core/meta_grammar.hpp>
+#include <boost/phoenix/object/detail/target.hpp>
+#include <boost/proto/transform/lazy.hpp>
+
+BOOST_PHOENIX_DEFINE_EXPRESSION(
+    (boost)(phoenix)(dynamic_cast_)
+  , (proto::terminal<detail::target<proto::_> >)
+    (meta_grammar)
+)
+    
+namespace boost { namespace phoenix
+{
+    struct dynamic_cast_eval
+    {
+        template <typename Sig>
+        struct result;
+
+        template <typename This, typename Target, typename Source, typename Context>
+        struct result<This(Target, Source, Context)>
+            : detail::result_of::target<Target>
+        {};
+
+        template <typename Target, typename Source, typename Context>
+        typename detail::result_of::target<Target>::type
+        operator()(Target, Source const& u, Context const& ctx) const
+        {
+            return
+                dynamic_cast<
+                    typename detail::result_of::target<Target>::type
+                >(boost::phoenix::eval(u, ctx));
+        }
+    };
+
+    template <typename Dummy>
+    struct default_actions::when<rule::dynamic_cast_, Dummy>
+        : call<dynamic_cast_eval, Dummy>
+    {};
+
+    template <typename T, typename U>
+    inline
+    typename expression::dynamic_cast_<detail::target<T>, U>::type const
+    dynamic_cast_(U const& u)
+    {
+        return
+            expression::
+                dynamic_cast_<detail::target<T>, U>::
+                    make(detail::target<T>(), u);
+    }
+}}
+
+#endif