Added boost header

test/external/boost/phoenix/core/reference.hpp

@@ -0,0 +1,148 @@
+/*==============================================================================
+    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_CORE_REFERENCE_HPP
+#define BOOST_PHOENIX_CORE_REFERENCE_HPP
+
+#include <boost/phoenix/core/limits.hpp>
+#include <boost/ref.hpp>
+#include <boost/phoenix/core/actor.hpp>
+#include <boost/phoenix/core/terminal.hpp>
+#include <boost/utility/result_of.hpp>
+
+namespace boost { namespace phoenix
+{
+    /////////////////////////////////////////////////////////////////////////////
+    //
+    // reference
+    //
+    //      function for evaluating references, e.g. ref(123)
+    //
+    /////////////////////////////////////////////////////////////////////////////
+    namespace expression
+    {
+        template <typename T>
+        struct reference
+            : expression::terminal<reference_wrapper<T> >
+        {
+            typedef
+                typename expression::terminal<reference_wrapper<T> >::type
+                type;
+
+            static const type make(T & t)
+            {
+                typename reference<T>::type const e = {{boost::ref(t)}};
+                return e;
+            }
+        };
+        
+        template <typename T>
+        struct reference<T const>
+            : expression::terminal<reference_wrapper<T const> >
+        {
+            typedef
+                typename expression::terminal<reference_wrapper<T const> >::type
+                type;
+
+            static const type make(T const & t)
+            {
+                typename reference<T const>::type const e = {{boost::cref(t)}};
+                return e;
+            }
+        };
+    }
+
+    namespace rule
+    {
+        struct reference
+            : expression::reference<proto::_>
+        {};
+    }
+
+    template <typename T>
+    typename expression::reference<T>::type const
+    inline ref(T & t)
+    {
+        return expression::reference<T>::make(t);
+    }
+
+    template <typename T>
+    typename expression::reference<T const>::type const
+    inline cref(T const & t)
+    {
+        return expression::reference<T const>::make(t);
+    }
+
+    // Call out boost::reference_wrapper for special handling
+    template<typename T>
+    struct is_custom_terminal<boost::reference_wrapper<T> >
+      : mpl::true_
+    {};
+
+    // Special handling for boost::reference_wrapper
+    template<typename T>
+    struct custom_terminal<boost::reference_wrapper<T> >
+    {
+        typedef T &result_type;
+
+        template <typename Context>
+        T &operator()(boost::reference_wrapper<T> r, Context &) const
+        {
+            return r;
+        }
+    };
+    
+    template<typename Expr>
+    struct custom_terminal<boost::reference_wrapper<actor<Expr> > >
+    {
+        template <typename Sig>
+        struct result;
+
+        template <typename This, typename Context>
+        struct result<This(boost::reference_wrapper<actor<Expr> > const &, Context)>
+            : boost::result_of<evaluator(actor<Expr> &, Context)>
+        {};
+
+        template <typename This, typename Context>
+        struct result<This(boost::reference_wrapper<actor<Expr> > &, Context)>
+            : boost::result_of<evaluator(actor<Expr> &, Context)>
+        {};
+
+        template <typename Context>
+        typename boost::result_of<evaluator(actor<Expr> &, Context const &)>::type
+        operator()(boost::reference_wrapper<actor<Expr> > & r, Context const & ctx) const
+        {
+            return boost::phoenix::eval(r, ctx);
+        }
+    };
+    
+    template<typename Expr>
+    struct custom_terminal<boost::reference_wrapper<actor<Expr> const> >
+    {
+        template <typename Sig>
+        struct result;
+
+        template <typename This, typename Context>
+        struct result<This(boost::reference_wrapper<actor<Expr> const> const &, Context)>
+            : boost::result_of<evaluator(actor<Expr> const&, Context)>
+        {};
+
+        template <typename This, typename Context>
+        struct result<This(boost::reference_wrapper<actor<Expr> const> &, Context)>
+            : boost::result_of<evaluator(actor<Expr> const&, Context)>
+        {};
+
+        template <typename Context>
+        typename boost::result_of<evaluator(actor<Expr> const&, Context const &)>::type
+        operator()(boost::reference_wrapper<actor<Expr> const> const & r, Context & ctx) const
+        {
+            return boost::phoenix::eval(unwrap_ref(r), ctx);
+        }
+    };
+}}
+
+#endif