Fix QDebug cumulating operator<< with many Q_ENUM

The problem is that the operator<< was taking a non-const reference to the QDebug
object. This causes a problem as all other operator<< return a temporary.
Since every other roperator<< takes the QDebug by value, we should also take it by value
in this case.

Move the operator<< in qdebug.h because i don't want to #include qdebug.h from qobject.h
And move the qt_QMetaEnum_debugOperator to be in the corresponding .cpp

Task-number: QTBUG-44462
Change-Id: Ia01629224c58930c2997e767efc43de90d6309e2
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>

2 files changed, 0 insertions, 24 deletions

diff --git a/src/corelib/kernel/qobject.cpp b/src/corelib/kernel/qobject.cpp
index 98e3f6b5bd..265cc68db5 100644
--- a/src/corelib/kernel/qobject.cpp
+++ b/src/corelib/kernel/qobject.cpp
@@ -4106,20 +4106,6 @@ QDebug operator<<(QDebug dbg, const QObject *o)
     dbg << ')';
     return dbg;
 }
-
-QDebug qt_QMetaEnum_debugOperator(QDebug &dbg, int value, const QMetaObject *meta, const char *name)
-{
-    QDebugStateSaver saver(dbg);
-    QMetaEnum me = meta->enumerator(meta->indexOfEnumerator(name));
-    const char *key = me.valueToKey(value);
-    dbg.nospace() << meta->className() << "::" << name << '(';
-    if (key)
-        dbg << key;
-    else
-        dbg << value;
-    dbg << ')';
-    return dbg;
-}
 #endif
 
 /*!
diff --git a/src/corelib/kernel/qobject.h b/src/corelib/kernel/qobject.h
index ae1c92f127..42d18d6c41 100644
--- a/src/corelib/kernel/qobject.h
+++ b/src/corelib/kernel/qobject.h
@@ -547,16 +547,6 @@ template <class T> inline const char * qobject_interface_iid()
 
 #ifndef QT_NO_DEBUG_STREAM
 Q_CORE_EXPORT QDebug operator<<(QDebug, const QObject *);
-Q_CORE_EXPORT QDebug qt_QMetaEnum_debugOperator(QDebug&, int value, const QMetaObject *meta, const char *name);
-
-template<typename T>
-typename QtPrivate::QEnableIf<QtPrivate::IsQEnumHelper<T>::Value , QDebug>::Type
-operator<<(QDebug &dbg, T value)
-{
-    const QMetaObject *obj = qt_getEnumMetaObject(value);
-    const char *name = qt_getEnumName(value);
-    return qt_QMetaEnum_debugOperator(dbg, typename QFlags<T>::Int(value), obj, name);
-}
 #endif
 
 class QSignalBlocker