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