Initialize all data members in QNetworkAccessCache::CacheableObject

Address the "A constructor must initialize all data members of the
class" warning.

The class should accept initial values as argument of a (possibly
protected) constructor if it expects them to be set by a derived
class.

Add an enum Option and a protected constructor that can be called
by the derived classes with the enum values.
This makes setExpires and setShareable redundant so remove them.

Found by an Axivion scan.

Pick-to: 6.7 6.5
Task-number: QTBUG-125026
Change-Id: Ia8a2a19469a2c0185b5d2e6b2a0895e897f33f28
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
(cherry picked from commit 36aa5fc3fa361ecb6f7bb035c3cace3dd14735e0)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

src/network/access/qhttpthreaddelegate.cpp

@@ -151,9 +151,9 @@ public:
     QNetworkAccessCachedHttpConnection(quint16 connectionCount, const QString &hostName, quint16 port, bool encrypt, bool isLocalSocket,
                                        QHttpNetworkConnection::ConnectionType connectionType)
         : QHttpNetworkConnection(connectionCount, hostName, port, encrypt, isLocalSocket, /*parent=*/nullptr, connectionType)
+        ,CacheableObject(Option::Expires | Option::Shareable)
     {
-        setExpires(true);
-        setShareable(true);
+
     }
 
     virtual void dispose() override

src/network/access/qnetworkaccessauthenticationmanager.cpp

@@ -22,9 +22,8 @@ class QNetworkAuthenticationCache : private QList<QNetworkAuthenticationCredenti
 {
 public:
     QNetworkAuthenticationCache()
+    : CacheableObject(Option::Shareable)
     {
-        setExpires(false);
-        setShareable(true);
         reserve(1);
     }
 

src/network/access/qnetworkaccesscache.cpp

@@ -31,10 +31,11 @@ struct QNetworkAccessCache::Node
     int useCount = 0;
 };
 
-QNetworkAccessCache::CacheableObject::CacheableObject()
+QNetworkAccessCache::CacheableObject::CacheableObject(Options options)
+    : expires(options & Option::Expires),
+      shareable(options & Option::Shareable)
 {
-    // leave the members uninitialized
-    // they must be initialized by the derived class's constructor
+
 }
 
 QNetworkAccessCache::CacheableObject::~CacheableObject()
@@ -46,16 +47,6 @@ QNetworkAccessCache::CacheableObject::~CacheableObject()
 #endif
 }
 
-void QNetworkAccessCache::CacheableObject::setExpires(bool enable)
-{
-    expires = enable;
-}
-
-void QNetworkAccessCache::CacheableObject::setShareable(bool enable)
-{
-    shareable = enable;
-}
-
 QNetworkAccessCache::~QNetworkAccessCache()
 {
     clear();

src/network/access/qnetworkaccesscache_p.h

@@ -19,6 +19,7 @@
 #include "QtCore/qobject.h"
 #include "QtCore/qbasictimer.h"
 #include "QtCore/qbytearray.h"
+#include <QtCore/qflags.h>
 #include "QtCore/qhash.h"
 #include "QtCore/qmetatype.h"
 
@@ -36,7 +37,6 @@ class QNetworkAccessCache: public QObject
 public:
     struct Node;
     typedef QHash<QByteArray, Node *> NodeHash;
-
     class CacheableObject
     {
         friend class QNetworkAccessCache;
@@ -45,14 +45,17 @@ public:
         bool shareable;
         qint64 expiryTimeoutSeconds = -1;
     public:
-        CacheableObject();
+        enum class Option {
+            Expires = 0x01,
+            Shareable = 0x02,
+        };
+        typedef QFlags<Option> Options; // #### QTBUG-127269
+
         virtual ~CacheableObject();
         virtual void dispose() = 0;
         inline QByteArray cacheKey() const { return key; }
-
     protected:
-        void setExpires(bool enable);
-        void setShareable(bool enable);
+        explicit CacheableObject(Options options);
     };
 
     ~QNetworkAccessCache();
@@ -85,6 +88,8 @@ private:
     bool emitEntryReady(Node *node, QObject *target, const char *member);
 };
 
+Q_DECLARE_OPERATORS_FOR_FLAGS(QNetworkAccessCache::CacheableObject::Options)
+
 QT_END_NAMESPACE
 
 #endif