From 93b8bd4799561a69213adc577614af76b597ca8f Mon Sep 17 00:00:00 2001
From: Denis Rystsov <denis@vectorized.io>
Date: Thu, 16 Jun 2022 09:09:53 -0700
Subject: [PATCH] make available_promise support variable templates

---
 src/v/utils/available_promise.h | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/v/utils/available_promise.h b/src/v/utils/available_promise.h
index f994b07ea141..a69f20241b1c 100644
--- a/src/v/utils/available_promise.h
+++ b/src/v/utils/available_promise.h
@@ -14,19 +14,20 @@
 
 #include <seastar/core/future.hh>
 
-template<typename T>
+template<class... T>
 class available_promise {
 public:
-    ss::future<T> get_future() { return _promise.get_future(); }
+    ss::future<T...> get_future() { return _promise.get_future(); }
 
-    void set_value(T&& value) {
+    template<typename... A>
+    void set_value(A&&... a) {
         _available = true;
-        _promise.set_value(std::move(value));
+        _promise.set_value(std::forward<A>(a)...);
     }
 
     bool available() { return _available; }
 
 private:
     bool _available{false};
-    ss::promise<T> _promise;
+    ss::promise<T...> _promise;
 };