Added universal reference to args parameter in EventQueue::enqueue, see issue #56. Updated contributor list.

include/eventpp/eventqueue.h

@@ -155,7 +155,7 @@ public:
 	}
 
 	template <typename ...A>
-	auto enqueue(A ...args) -> typename std::enable_if<sizeof...(A) == sizeof...(Args), void>::type
+	auto enqueue(A && ...args) -> typename std::enable_if<sizeof...(A) == sizeof...(Args), void>::type
 	{
 		static_assert(super::ArgumentPassingMode::canIncludeEventType, "Enqueuing arguments count doesn't match required (Event type should be included).");
 
@@ -172,7 +172,7 @@ public:
 	}
 
 	template <typename T, typename ...A>
-	auto enqueue(T && first, A ...args) -> typename std::enable_if<sizeof...(A) == sizeof...(Args), void>::type
+	auto enqueue(T && first, A && ...args) -> typename std::enable_if<sizeof...(A) == sizeof...(Args), void>::type
 	{
 		static_assert(super::ArgumentPassingMode::canExcludeEventType, "Enqueuing arguments count doesn't match required (Event type should NOT be included).");
 

readme.md

@@ -308,10 +308,11 @@ Added CallbackList, EventDispatcher, EventQueue, CounterRemover, ConditionalRemo
 <td align="center"><a href="https://github.com/MH2033/"><img alt="MH2033" src="https://github.com/MH2033.png?s=100" width="100px;" /></a><span>MH2033</span></td>
 <td align="center"><a href="https://github.com/zhllxt/"><img alt="zhllxt" src="https://github.com/zhllxt.png?s=100" width="100px;" /></a><span>zhllxt</span></td>
 <td align="center"><a href="https://github.com/marsCatXdu/"><img alt="marsCatXdu" src="https://github.com/marsCatXdu.png?s=100" width="100px;" /></a><span>marsCatXdu</span></td>
+<td align="center"><a href="https://github.com/Chaojimengnan/"><img alt="Chaojimengnan" src="https://github.com/Chaojimengnan.png?s=100" width="100px;" /></a><span>Chaojimengnan</span></td>
 </tr>
 </table>
 
-I (wqking) would like to sincerely thank all participants for the contributions. Your contributions makes `eventpp` better and bright future.
+I (wqking) would like to sincerely thank all participants for the contributions. Your contributions make `eventpp` better and bright future.
 I maintain the contributors list manually, according to the criteria below,
 
 1. Your Pull Request is approved and merged to any branch.

tests/unittest/test_queue_basic.cpp

@@ -344,6 +344,48 @@ TEST_CASE("EventQueue, non-copyable but movable unique_ptr")
 	}
 }
 
+TEST_CASE("EventQueue, copyable event object")
+{
+	struct MyCopyable {
+		MyCopyable(int * counter, const int value) : counter(counter), value(value) {
+		}
+
+		MyCopyable(const MyCopyable & other) : counter(other.counter), value(other.value) {
+			++*counter;
+		}
+
+		MyCopyable(MyCopyable && other) : counter(other.counter), value(other.value) {
+		}
+
+		MyCopyable & operator = (const MyCopyable & other) {
+			counter = other.counter;
+			value = other.value;
+			++*counter;
+			return *this;
+		}
+
+		int * counter;
+		int value;
+	};
+
+	using EQ = eventpp::EventQueue<int, void (const MyCopyable &)>;
+	EQ queue;
+
+	// This is to ensure changing EventQueue::enqueue(A ...args) to EventQueue::enqueue(A && ...args) works properly
+	SECTION("For enqueue by r-value, there should be no copy/assignment") {
+		int copiedCount = 0;
+		queue.appendListener(3, [&copiedCount](const MyCopyable & object) {
+			REQUIRE(*object.counter == 0);
+			REQUIRE(copiedCount == 0);
+			REQUIRE(object.value == 5);
+		});
+
+		queue.enqueue(3, MyCopyable(&copiedCount, 5));
+		queue.process();
+		REQUIRE(copiedCount == 0);
+	}
+}
+
 TEST_CASE("EventQueue, peekEvent/takeEvent/dispatch")
 {
 	using SP = std::shared_ptr<int>;