2 files changed, 33 insertions, 0 deletions
diff --git a/src/corelib/io/qdebug.cpp b/src/corelib/io/qdebug.cpp
index b0ee715c75..7b49505228 100644
--- a/src/corelib/io/qdebug.cpp
+++ b/src/corelib/io/qdebug.cpp
@@ -40,6 +40,7 @@
 #endif
 
 #include "qdebug.h"
+#include "qmetaobject.h"
 #include <private/qtextstream_p.h>
 #include <private/qtools_p.h>
 
@@ -643,4 +644,23 @@ QDebugStateSaver::~QDebugStateSaver()
     d->restoreState();
 }
 
+#ifndef QT_NO_QOBJECT
+/*!
+    \internal
+ */
+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
+
 QT_END_NAMESPACE
diff --git a/src/corelib/io/qdebug.h b/src/corelib/io/qdebug.h
index 56a5e1fa74..435e7450c7 100644
--- a/src/corelib/io/qdebug.h
+++ b/src/corelib/io/qdebug.h
@@ -261,6 +261,19 @@ inline QDebug operator<<(QDebug debug, const QContiguousCache<T> &cache)
     return debug.maybeSpace();
 }
 
+#ifndef QT_NO_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
+
 template <class T>
 inline QDebug operator<<(QDebug debug, const QFlags<T> &flags)
 {