[Boost-commit] svn:boost r68104 - sandbox/statistics/support/boost/assign/v2/ref/wrapper

Subject: [Boost-commit] svn:boost r68104 - sandbox/statistics/support/boost/assign/v2/ref/wrapper
From: erwann.rogard_at_[hidden]
Date: 2011-01-13 11:19:12

Author: e_r
Date: 2011-01-13 11:19:07 EST (Thu, 13 Jan 2011)
New Revision: 68104
URL: http://svn.boost.org/trac/boost/changeset/68104

Log:
upd boost/assign/v2
Added:
   sandbox/statistics/support/boost/assign/v2/ref/wrapper/get.hpp   (contents, props changed)

Added: sandbox/statistics/support/boost/assign/v2/ref/wrapper/get.hpp
==============================================================================
--- (empty file)
+++ sandbox/statistics/support/boost/assign/v2/ref/wrapper/get.hpp	2011-01-13 11:19:07 EST (Thu, 13 Jan 2011)
@@ -0,0 +1,130 @@
+//////////////////////////////////////////////////////////////////////////////
+//  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_REF_WRAPPER_GET_ER_2010_HPP
+#define BOOST_ASSIGN_V2_REF_WRAPPER_GET_ER_2010_HPP
+#include <boost/ref.hpp>
+#include <boost/utility/enable_if.hpp>
+#include <boost/type_traits/add_reference.hpp>
+#include <boost/type_traits/remove_reference.hpp>
+#include <boost/range/reference.hpp>
+#include <boost/range/adaptor/transformed.hpp>
+
+namespace boost{
+namespace assign{ 
+namespace v2{
+namespace ref{
+namespace result_of{
+
+    template<typename T>
+    struct get : boost::add_reference<
+        typename boost::unwrap_reference<
+        	// cv taken care of by unwrap_reference
+            typename boost::remove_reference<T>::type
+        >::type
+    >{};
+
+}// result_of
+
+	template<typename W>
+    typename boost::lazy_enable_if<
+    	boost::is_reference_wrapper<W>,
+        ref::result_of::get<W>
+    >::type
+    get(W const& w)
+    {
+    	return w.get();	
+    }
+
+	// Functor
+
+	struct get_functor
+    {
+    
+    	template<typename S>
+        struct result{};
+        
+        template<typename F, typename T>
+        struct result<F(T)> : ref::result_of::get<T>{};
+    
+    	template<typename W>
+    	typename boost::lazy_enable_if<
+    		boost::is_reference_wrapper<W>,
+        	ref::result_of::get<W>
+    	>::type
+        operator()(W const& w)const
+        {
+    		return get( w );
+    	}
+        
+    };
+
+	// Range
+
+namespace result_of{
+
+	template<typename R>
+    struct range_get_impl{
+    
+    	typedef ref::get_functor functor_;
+    	typedef boost::transform_range<functor_, R> type;
+    
+    };
+
+	template<typename R>
+    struct range_get : boost::lazy_enable_if<
+    	boost::is_reference_wrapper<
+        	typename boost::range_value<
+            	typename boost::remove_cv<R>::type
+            >::type
+        >,
+        range_get_impl<R>
+    >{};
+
+}// result_of
+
+	template<typename R>
+    typename ref::result_of::range_get<R>::type
+    range_get(R& r)
+    {
+    	typedef typename ref::result_of::range_get<R>::type result_;
+		return result_(get_functor(), r);
+    }
+	template<typename R>
+    typename ref::result_of::range_get<R const>::type
+    range_get(R const& r)
+    {
+    	typedef typename ref::result_of::range_get<R const>::type result_;
+		return result_(get_functor(), r);
+    }
+
+	struct get_adaptor{};
+    
+namespace{
+	get_adaptor const _get = get_adaptor();
+}
+
+	template<typename R>
+    typename ref::result_of::range_get<R>::type
+	operator|(R& r, get_adaptor){
+    	return range_get( r );
+    }
+
+	template<typename R>
+    typename ref::result_of::range_get<R const>::type
+	operator|(R const& r, get_adaptor){
+    	return range_get( r );
+    }
+
+}// ref
+}// v2
+}// assign
+}// boost
+
+#endif