#include <boost/hana/core/when.hpp>
-BOOST_HANA_NAMESPACE_BEGIN
+namespace boost { namespace hana {
//! Sequentially compose two monadic actions, discarding any value
//! produced by the first but not its effects.
//! @ingroup group-Monad
constexpr decltype(auto) operator()(Before&& before, Xs&& xs) const;
};
- constexpr then_t then{};
+ BOOST_HANA_INLINE_VARIABLE constexpr then_t then{};
#endif
-BOOST_HANA_NAMESPACE_END
+}} // end namespace boost::hana
#endif // !BOOST_HANA_FWD_THEN_HPP