From b2004620bdbc55aededf32dbf67568a153f24c94 Mon Sep 17 00:00:00 2001
From: Dennis Oberst <dennis.oberst@qt.io>
Date: Wed, 12 Jul 2023 16:51:26 +0200
Subject: [PATCH] QNativeIpcKey: add implicit default ctor

Add an implicitly callable default ctor, to enable default returns,
but still disallow implicit conversion whilst assigning:

  QNativeIpcKey k = QNativeIpcKey::Type::~~      // not allowed
  auto fn = []() -> QNativeIpcKey { return {}; } // allowed

Change-Id: I0f8476a588b3931f0e1f41a6c3a3fd8f2eb75b93
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
(cherry picked from commit 08605f0d7848533bd62b9114dd0e5b175dd00aa3)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/corelib/ipc/qtipccommon.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/corelib/ipc/qtipccommon.h b/src/corelib/ipc/qtipccommon.h
index 5640b6ff6db..34d6edf03d6 100644
--- a/src/corelib/ipc/qtipccommon.h
+++ b/src/corelib/ipc/qtipccommon.h
@@ -37,7 +37,11 @@ public:
             ;
     static Type legacyDefaultTypeForOs() noexcept;
 
-    explicit constexpr QNativeIpcKey(Type type = DefaultTypeForOs) noexcept
+    constexpr QNativeIpcKey() noexcept
+        : QNativeIpcKey(DefaultTypeForOs)
+    {}
+
+    explicit constexpr QNativeIpcKey(Type type) noexcept
         : d()
     {
         typeAndFlags.type = type;