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[ceph.git] / ceph / src / boost / boost / hana / fwd / one.hpp

diff --git a/ceph/src/boost/boost/hana/fwd/one.hpp b/ceph/src/boost/boost/hana/fwd/one.hpp
index d2c67b7228edafc4a756b6e4caa523cdf752f59d..27d4f37bd68981e8413e57c210fb695659af19d8 100644 (file)
--- a/ceph/src/boost/boost/hana/fwd/one.hpp
+++ b/ceph/src/boost/boost/hana/fwd/one.hpp
@@ -35,7 +35,9 @@ BOOST_HANA_NAMESPACE_BEGIN
     struct one_impl : one_impl<R, when<true>> { };
 
     template <typename R>
-    struct one_t;
+    struct one_t {
+        constexpr decltype(auto) operator()() const;
+    };
 
     template <typename R>
     constexpr one_t<R> one{};