diff options
Diffstat (limited to 'boost/hana/fwd/tap.hpp')
| -rw-r--r-- | boost/hana/fwd/tap.hpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/boost/hana/fwd/tap.hpp b/boost/hana/fwd/tap.hpp index 846c1d00e6..2f3809c1f3 100644 --- a/boost/hana/fwd/tap.hpp +++ b/boost/hana/fwd/tap.hpp @@ -55,7 +55,10 @@ BOOST_HANA_NAMESPACE_BEGIN struct tap_impl : tap_impl<M, when<true>> { }; template <typename M> - struct tap_t; + struct tap_t { + template <typename F> + constexpr auto operator()(F&& f) const; + }; template <typename M> constexpr tap_t<M> tap{}; |