#include <boost/hana/config.hpp>
-BOOST_HANA_NAMESPACE_BEGIN
+namespace boost { namespace hana {
//! @ingroup group-core
//! Enable a partial specialization only if a boolean condition is true.
//!
core_detail::always_true<Dummy...>::value
>;
#endif
-BOOST_HANA_NAMESPACE_END
+}} // end namespace boost::hana
#endif // !BOOST_HANA_FWD_CORE_WHEN_HPP