#include <boost/hana/core/when.hpp>
-BOOST_HANA_NAMESPACE_BEGIN
+namespace boost { namespace hana {
//! Evaluate a lazy value and return it.
//! @relates hana::lazy
//!
constexpr decltype(auto) operator()(Expr&& expr) const;
};
- constexpr eval_t eval{};
+ BOOST_HANA_INLINE_VARIABLE constexpr eval_t eval{};
#endif
-BOOST_HANA_NAMESPACE_END
+}} // end namespace boost::hana
#endif // !BOOST_HANA_FWD_EVAL_HPP