From c32576642323e2a957dc12abd89b61022ad594f8 Mon Sep 17 00:00:00 2001
From: Marc Mutz <marc.mutz@qt.io>
Date: Tue, 13 Jun 2023 09:34:12 +0200
Subject: [PATCH] QSignalBlocker: plaster with [[nodiscard]]

It's a RAII class, and RAII classes should be marked [[nodiscard]] at
the class as well as the ctor level.

Task-number: QTBUG-104164
Change-Id: I77260dc00d51d62ed1064e13f566d04e88d28ef9
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
(cherry picked from commit 16a19a4f4ab207eba4ba6da987b31628b51903b0)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/corelib/kernel/qobject.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/corelib/kernel/qobject.h b/src/corelib/kernel/qobject.h
index 3c102a0a851..49435b97016 100644
--- a/src/corelib/kernel/qobject.h
+++ b/src/corelib/kernel/qobject.h
@@ -436,13 +436,16 @@ inline QBindingStorage *qGetBindingStorage(QObject *o)
 Q_CORE_EXPORT QDebug operator<<(QDebug, const QObject *);
 #endif
 
-class QSignalBlocker
+class [[nodiscard]] QSignalBlocker
 {
 public:
+    Q_NODISCARD_CTOR
     inline explicit QSignalBlocker(QObject *o) noexcept;
+    Q_NODISCARD_CTOR
     inline explicit QSignalBlocker(QObject &o) noexcept;
     inline ~QSignalBlocker();
 
+    Q_NODISCARD_CTOR
     inline QSignalBlocker(QSignalBlocker &&other) noexcept;
     inline QSignalBlocker &operator=(QSignalBlocker &&other) noexcept;