From 9fa5d635251a721933519fed7048e0bf4f121ece Mon Sep 17 00:00:00 2001
From: "Vicente J. Botet Escriba" <vicente.botet@wanadoo.fr>
Date: Sun, 25 Mar 2012 15:58:40 +0000
Subject: [PATCH] Utility: Apply patch for 6570: Adding noexcept to
 boost::declval

[SVN r77539]
---
 include/boost/utility/declval.hpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/boost/utility/declval.hpp b/include/boost/utility/declval.hpp
index 41ec3dc..123f776 100644
--- a/include/boost/utility/declval.hpp
+++ b/include/boost/utility/declval.hpp
@@ -13,6 +13,7 @@
 //----------------------------------------------------------------------------//
 
 #include <boost/type_traits/add_rvalue_reference.hpp>
+#include <boost/type_traits/add_lvalue_reference.hpp>
 
 //----------------------------------------------------------------------------//
 //                                                                            //
@@ -36,9 +37,13 @@
 
 namespace boost {
 
+#if !defined(BOOST_NO_RVALUE_REFERENCES)
     template <typename T>
     typename add_rvalue_reference<T>::type declval(); //noexcept; // as unevaluated operand
-
+#else
+    template <typename T>
+    typename add_lvalue_reference<T>::type declval() BOOST_NOEXCEPT; // as unevaluated operand
+#endif
 }  // namespace boost
 
 #endif  // BOOST_TYPE_TRAITS_EXT_DECLVAL__HPP