[Boost-commit] svn:boost r69458 - sandbox/assign_v2/boost/assign/v2/utility/chain

Subject: [Boost-commit] svn:boost r69458 - sandbox/assign_v2/boost/assign/v2/utility/chain
From: erwann.rogard_at_[hidden]
Date: 2011-03-01 21:16:51

Author: e_r
Date: 2011-03-01 21:16:48 EST (Tue, 01 Mar 2011)
New Revision: 69458
URL: http://svn.boost.org/trac/boost/changeset/69458

Log:
upd assign_v2
Added:
   sandbox/assign_v2/boost/assign/v2/utility/chain/use_const.hpp   (contents, props changed)

Added: sandbox/assign_v2/boost/assign/v2/utility/chain/use_const.hpp
==============================================================================
--- (empty file)
+++ sandbox/assign_v2/boost/assign/v2/utility/chain/use_const.hpp	2011-03-01 21:16:48 EST (Tue, 01 Mar 2011)
@@ -0,0 +1,56 @@
+//////////////////////////////////////////////////////////////////////////////
+//  Boost.Assign v2                                                         //
+//                                                                          //
+//  Copyright (C) 2003-2004 Thorsten Ottosen                                //
+//  Copyright (C) 2010 Erwann Rogard                                        //
+//  Use, modification and distribution are subject to 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_ASSIGN_V2_CHAIN_USE_CONST_ER_2010_HPP
+#define BOOST_ASSIGN_V2_CHAIN_USE_CONST_ER_2010_HPP
+#include <boost/config.hpp>
+#include <boost/mpl/and.hpp>
+#include <boost/mpl/eval_if.hpp>
+#include <boost/mpl/bool.hpp>
+#include <boost/mpl/identity.hpp>
+#include <boost/type_traits/remove_reference.hpp>
+#include <boost/type_traits/is_reference.hpp>
+#include <boost/type_traits/is_same.hpp>
+#include <boost/type_traits/is_const.hpp>
+#include <boost/range/reference.hpp>
+
+namespace boost{
+    struct use_default;
+namespace assign{
+namespace v2{
+namespace chain_aux{
+
+    template<typename U1, typename U2,
+        bool is_r = boost::is_reference<U1>::value,
+        bool is_c = boost::is_const<
+            typename boost::remove_reference<U1>::type
+        >::value
+    >
+    struct dont_use_const_impl : ::boost::mpl::false_{};
+
+    template<typename U>
+    struct dont_use_const_impl<U, U, true, false> : ::boost::mpl::true_{};
+
+    template<typename R1, typename R2, typename Tag = use_default>
+    struct dont_use_const : dont_use_const_impl<
+        typename boost::range_reference<R1>::type,
+        typename boost::range_reference<R2>::type
+    >{};
+
+    template<typename R1, typename R2, typename Tag = use_default>
+    struct use_const : ::boost::mpl::bool_<
+    	!dont_use_const<R1, R2, Tag>::value
+    >{};
+
+}// chain_aux
+}// v2
+}// assign
+}// boost
+
+#endif