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

diff --git a/ceph/src/boost/boost/hana/fwd/sum.hpp b/ceph/src/boost/boost/hana/fwd/sum.hpp
index c565ecd7f7cf692d8adb6cf6d7eb96f6aa8d4e22..6d7ee537b3e37e7c1324ebe73d759e28a20ad61e 100644 (file)
--- a/ceph/src/boost/boost/hana/fwd/sum.hpp
+++ b/ceph/src/boost/boost/hana/fwd/sum.hpp
@@ -69,7 +69,10 @@ BOOST_HANA_NAMESPACE_BEGIN
     struct sum_impl : sum_impl<T, when<true>> { };
 
     template <typename M>
-    struct sum_t;
+    struct sum_t {
+        template <typename Xs>
+        constexpr decltype(auto) operator()(Xs&& xs) const;
+    };
 
     template <typename M = integral_constant_tag<int>>
     constexpr sum_t<M> sum{};