From f897f722e308d36dfc68ea1a3959f8c2d449dae0 Mon Sep 17 00:00:00 2001
From: Marc Mutz <marc.mutz@qt.io>
Date: Wed, 21 Jun 2023 11:45:50 +0200
Subject: [PATCH] QFutureSynchronizer: mark ctors [[nodiscard]]

QFutureSynchronizer is a RAII class. QUIP-0019 says that RAII class
ctors should be marked as [[nodiscard]].

Task-number: QTBUG-104164
Change-Id: I0b6710f2b9a14d67f64150f240f819b8336e0929
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>
(cherry picked from commit f403ef428efab5af857e85d9d28c5f7b64603ec0)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/corelib/thread/qfuturesynchronizer.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/corelib/thread/qfuturesynchronizer.h b/src/corelib/thread/qfuturesynchronizer.h
index 183e3ab3424..368ef0c81b2 100644
--- a/src/corelib/thread/qfuturesynchronizer.h
+++ b/src/corelib/thread/qfuturesynchronizer.h
@@ -17,7 +17,8 @@ class QFutureSynchronizer
     Q_DISABLE_COPY(QFutureSynchronizer)
 
 public:
-    QFutureSynchronizer() : m_cancelOnWait(false) { }
+    Q_NODISCARD_CTOR QFutureSynchronizer() : m_cancelOnWait(false) { }
+    Q_NODISCARD_CTOR
     explicit QFutureSynchronizer(QFuture<T> future)
         : m_cancelOnWait(false)
     { addFuture(std::move(future)); }