crimson/common: add discard_result() to errorator

so we can discard result explicitly.

Signed-off-by: Kefu Chai <kchai@redhat.com>

diff --git a/src/crimson/common/errorator.h b/src/crimson/common/errorator.h
index f9ec7bf4a3f14685025514016b3c4e9abb9c07e7..8a821d17b2c1583d061edde896a6a0bb1e4716a9 100644 (file)
--- a/src/crimson/common/errorator.h
+++ b/src/crimson/common/errorator.h
@@ -641,6 +641,11 @@ private:
       });
     }
 
+    _future<::crimson::errorated_future_marker<void>>
+    discard_result() noexcept {
+      return safe_then([](auto&&) {});
+    }
+
     // taking ErrorFuncOne and ErrorFuncTwo separately from ErrorFuncTail
     // to avoid SFINAE
     template <class ValueFunc,