optional.hpp in passenger-6.0.23

- old
+ new

@@ -28,11 +28,11 @@
 
 #include <boost/assert.hpp>
 #include <boost/core/addressof.hpp>
 #include <boost/core/enable_if.hpp>
 #include <boost/core/explicit_operator_bool.hpp>
-#include <boost/core/swap.hpp>
+#include <boost/core/invoke_swap.hpp>
 #include <boost/optional/bad_optional_access.hpp>
 #include <boost/static_assert.hpp>
 #include <boost/throw_exception.hpp>
 #include <boost/type.hpp>
 #include <boost/type_traits/alignment_of.hpp>
@@ -1258,10 +1258,10 @@
 
     void swap( optional & arg )
       BOOST_NOEXCEPT_IF(::boost::is_nothrow_move_constructible<T>::value && ::boost::is_nothrow_move_assignable<T>::value)
       {
         // allow for Koenig lookup
-        boost::swap(*this, arg);
+        boost::core::invoke_swap(*this, arg);
       }
 
 
     // Returns a reference to the value if this is initialized, otherwise,
     // the behaviour is UNDEFINED