Add std::hash specializations for shared_ptr, local_shared_ptr, intrusive_ptr

include/boost/smart_ptr/shared_ptr.hpp

@@ -1165,6 +1165,25 @@ template< class T > std::size_t hash_value( boost::shared_ptr<T> const & p ) BOO
 
 } // namespace boost
 
+// std::hash
+
+#if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+namespace std
+{
+
+template<class T> struct hash< ::boost::shared_ptr<T> >
+{
+    std::size_t operator()( ::boost::shared_ptr<T> const & v ) const BOOST_SP_NOEXCEPT
+    {
+        return hash_value( v );
+    }
+};
+
+} // namespace std
+
+#endif // #if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
 #include <boost/smart_ptr/detail/local_sp_deleter.hpp>
 
 namespace boost