From 30dbbc44fc85cb0882badd3b1da289b4571218d6 Mon Sep 17 00:00:00 2001
From: bolero-MURAKAMI <bolero.murakami@gmail.com>
Date: Sat, 7 Apr 2012 22:36:12 +0900
Subject: [PATCH] add lvalue_forward.hpp

---
 sprout/utility/lvalue_forward.hpp | 24 ++++++++++++++++++++++++
 sprout/utility/operation_ext.hpp  |  1 +
 2 files changed, 25 insertions(+)
 create mode 100644 sprout/utility/lvalue_forward.hpp

diff --git a/sprout/utility/lvalue_forward.hpp b/sprout/utility/lvalue_forward.hpp
new file mode 100644
index 00000000..236212f6
--- /dev/null
+++ b/sprout/utility/lvalue_forward.hpp
@@ -0,0 +1,24 @@
+#ifndef SPROUT_UTILITY_LVALUE_FORWARD_HPP
+#define SPROUT_UTILITY_LVALUE_FORWARD_HPP
+
+#include <type_traits>
+#include <sprout/config.hpp>
+#include <sprout/utility/forward.hpp>
+#include <sprout/utility/as_lvalue.hpp>
+#include <sprout/type_traits.hpp>
+
+namespace sprout {
+	//
+	// lvalue_forward
+	//
+	template<typename T>
+	inline SPROUT_CONSTEXPR typename sprout::lvalue_reference<T>::type
+	lvalue_forward(typename std::remove_reference<T>::type& t) {
+		return sprout::as_lvalue(sprout::forward<T>(t));
+	}
+	template<typename T>
+	inline SPROUT_CONSTEXPR typename sprout::lvalue_reference<T>::type
+	lvalue_forward(typename std::remove_reference<T>::type&& t) = delete;
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_UTILITY_LVALUE_FORWARD_HPP
diff --git a/sprout/utility/operation_ext.hpp b/sprout/utility/operation_ext.hpp
index ad064555..924d4edf 100644
--- a/sprout/utility/operation_ext.hpp
+++ b/sprout/utility/operation_ext.hpp
@@ -4,5 +4,6 @@
 #include <sprout/config.hpp>
 #include <sprout/utility/as_lvalue.hpp>
 #include <sprout/utility/as_const.hpp>
+#include <sprout/utility/lvalue_forward.hpp>
 
 #endif	// #ifndef SPROUT_UTILITY_OPERATION_EXT_HPP