From 201c382e86a74212d922343b41c6c720105cd0e6 Mon Sep 17 00:00:00 2001
From: Mateusz Jakub Fila <mateusz.jakub.fila@cern.ch>
Date: Wed, 25 Feb 2026 16:28:58 +0100
Subject: [PATCH] add overload to resolve ambiguity in alien coroutine
 return_value

---
 include/CoroutineTests/alien/algorithm.hpp        | 4 ++++
 include/CoroutineTests/alien/manual_algorithm.hpp | 2 ++
 include/CoroutineTests/alien/subtool.hpp          | 2 ++
 include/CoroutineTests/alien/tool.hpp             | 2 ++
 4 files changed, 10 insertions(+)

diff --git a/include/CoroutineTests/alien/algorithm.hpp b/include/CoroutineTests/alien/algorithm.hpp
index 06cbe9b..c74a842 100644
--- a/include/CoroutineTests/alien/algorithm.hpp
+++ b/include/CoroutineTests/alien/algorithm.hpp
@@ -115,6 +115,10 @@ struct Task<ResultType>::promise_type {
     void return_value(T&& value) {
         m_promise.set_value(std::forward<T>(value));
     }
+    // Overload to resolve ambiguity
+    void return_value(ResultType value) {
+        m_promise.set_value(std::move(value));
+    }
 };
 
 template <typename ResultType>
diff --git a/include/CoroutineTests/alien/manual_algorithm.hpp b/include/CoroutineTests/alien/manual_algorithm.hpp
index 1a44d3a..16b8d22 100644
--- a/include/CoroutineTests/alien/manual_algorithm.hpp
+++ b/include/CoroutineTests/alien/manual_algorithm.hpp
@@ -113,6 +113,8 @@ struct Task<ResultType>::promise_type {
     void return_value(T&& value) {
         m_value = std::forward<T>(value);
     }
+    // Overload to resolve ambiguity
+    void return_value(ResultType value) { m_value.emplace(std::move(value)); }
 };
 
 template <typename ResultType>
diff --git a/include/CoroutineTests/alien/subtool.hpp b/include/CoroutineTests/alien/subtool.hpp
index f394228..43a18e8 100644
--- a/include/CoroutineTests/alien/subtool.hpp
+++ b/include/CoroutineTests/alien/subtool.hpp
@@ -117,6 +117,8 @@ struct ReturnHelper {
     void return_value(T&& value) {
         m_value.emplace(std::forward<T>(value));
     }
+    // Overload to resolve ambiguity
+    void return_value(ResultType value) { m_value.emplace(std::move(value)); }
 };
 
 // Specialization for void return type
diff --git a/include/CoroutineTests/alien/tool.hpp b/include/CoroutineTests/alien/tool.hpp
index 8a50379..4e4b033 100644
--- a/include/CoroutineTests/alien/tool.hpp
+++ b/include/CoroutineTests/alien/tool.hpp
@@ -117,6 +117,8 @@ struct ReturnHelper {
     void return_value(T&& value) {
         m_value.emplace(std::forward<T>(value));
     }
+    // Overload to resolve ambiguity
+    void return_value(ResultType value) { m_value.emplace(std::move(value)); }
 };
 
 // Specialization for void return type