[Boost-commit] svn:boost r70388 - sandbox/assign_v2/boost/assign/v2/optional

Subject: [Boost-commit] svn:boost r70388 - sandbox/assign_v2/boost/assign/v2/optional
From: erwann.rogard_at_[hidden]
Date: 2011-03-22 12:41:35

Author: e_r
Date: 2011-03-22 12:41:35 EDT (Tue, 22 Mar 2011)
New Revision: 70388
URL: http://svn.boost.org/trac/boost/changeset/70388

Log:
upd assign_v2
Added:
   sandbox/assign_v2/boost/assign/v2/optional/key.hpp   (contents, props changed)

Added: sandbox/assign_v2/boost/assign/v2/optional/key.hpp
==============================================================================
--- (empty file)
+++ sandbox/assign_v2/boost/assign/v2/optional/key.hpp	2011-03-22 12:41:35 EDT (Tue, 22 Mar 2011)
@@ -0,0 +1,70 @@
+//////////////////////////////////////////////////////////////////////////////
+//  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_INTERPRETER_KEY_ER_2010_HPP
+#define BOOST_ASSIGN_V2_INTERPRETER_KEY_ER_2010_HPP
+#include <boost/assign/v2/interpreter/data.hpp>
+#include <boost/assign/v2/optional/data.hpp>
+#include <boost/mpl/apply.hpp>
+
+namespace boost{
+namespace assign{
+namespace v2{
+//[syntax_optional_key
+namespace aux{
+
+    template<typename C>
+    struct container_key{ typedef typename C::key_type type; };
+
+    template<typename /*<<Value or pointer-container>>*/C>
+    struct /*<<Metafunction>>*/deduce_key_generator/*<-*/
+        :  boost::mpl::eval_if<
+            ptr_container_aux::is_ptr_container<C>,
+            deduce_ptr_generator<C, container_key>,
+            deduce_value_generator<C, container_key>
+        >
+    {}/*->*/;
+
+    struct optional_key{};
+
+
+namespace result_of{
+
+    template<typename C, typename D>
+    struct optional_key : ::boost::mpl::apply1<
+        aux::result_of::optional_data_generator<D>,
+        typename deduce_key_generator<C>::type
+    >{};
+
+}//result_of
+
+    template<typename C, typename F, typename Tag, typename D>
+    typename result_of::optional_key<C, D>::type
+    operator%/*<<Overrides data generator with a constructor for C::key_type>>*/(
+        interpreter_crtp<C, F, Tag, D> const& lhs,
+        optional_key rhs
+    )/*<-*/
+    {
+        typedef typename deduce_key_generator<C>::type gen_;
+        return lhs % ( _data = gen_() );
+    }/*<-*/BOOST_ASSIGN_V2_IGNORE(/*<-*/;/*->*/)/*->*/
+
+
+}// aux
+//<-
+namespace{
+//->
+    aux::optional_key const _key/*<-*/= aux::optional_key()/*->*/;
+//]
+}
+}// v2
+}// assign
+}// boost
+
+#endif // BOOST_ASSIGN_V2_INTERPRETER_KEY_ER_2010_HPP