try making co_return strict

redpanda-data · Jan 3, 2025 · 5d479bf · 5d479bf
1 parent f194d34
commit 5d479bf
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/include/seastar/core/coroutine.hh b/include/seastar/core/coroutine.hh
@@ -49,9 +49,11 @@ public:
         promise_type(promise_type&&) = delete;
         promise_type(const promise_type&) = delete;
 
-        template<typename... U>
-        void return_value(U&&... value) {
-            _promise.set_value(std::forward<U>(value)...);
+        template<typename U>
+        void return_value(U&& value) {
+            using From = decltype(std::forward<U>(value));
+            static_assert(std::is_convertible_v<From, T>, "only implicit conversions are considered");
+            _promise.set_value(std::forward<U>(value));
         }
 
         void return_value(coroutine::exception ce) noexcept {