Update boost to version 1.58

[lyx.git] / boost / boost / utility / base_from_member.hpp

diff --git a/boost/boost/utility/base_from_member.hpp b/boost/boost/utility/base_from_member.hpp
index e32ecb8d9c3fcd5347ba315450581ff093e431d4..fc0e13c0d7249716ad676e19f8015de94dde4620 100644 (file)
--- a/boost/boost/utility/base_from_member.hpp
+++ b/boost/boost/utility/base_from_member.hpp
@@ -148,6 +148,19 @@ protected:
 
 };  // boost::base_from_member
 
+template < typename MemberType, int UniqueID >
+class base_from_member<MemberType&, UniqueID>
+{
+protected:
+    MemberType& member;
+
+    explicit BOOST_CONSTEXPR base_from_member( MemberType& x )
+        BOOST_NOEXCEPT
+        : member( x )
+        {}
+
+};  // boost::base_from_member
+
 }  // namespace boost