1 files changed, 24 insertions, 0 deletions
diff --git a/src/corelib/tools/qshareddata.h b/src/corelib/tools/qshareddata.h
index 780f2331a8..3ef134a99d 100644
--- a/src/corelib/tools/qshareddata.h
+++ b/src/corelib/tools/qshareddata.h
@@ -136,6 +136,18 @@ private:
     T *d;
 };
 
+template <class T> inline bool operator==(std::nullptr_t p1, const QSharedDataPointer<T> &p2)
+{
+    Q_UNUSED(p1);
+    return !p2;
+}
+
+template <class T> inline bool operator==(const QSharedDataPointer<T> &p1, std::nullptr_t p2)
+{
+    Q_UNUSED(p2);
+    return !p1;
+}
+
 template <class T> class QExplicitlySharedDataPointer
 {
 public:
@@ -271,6 +283,18 @@ Q_INLINE_TEMPLATE QExplicitlySharedDataPointer<T>::QExplicitlySharedDataPointer(
     : d(adata)
 { if (d) d->ref.ref(); }
 
+template <class T> inline bool operator==(std::nullptr_t p1, const QExplicitlySharedDataPointer<T> &p2)
+{
+    Q_UNUSED(p1);
+    return !p2;
+}
+
+template <class T> inline bool operator==(const QExplicitlySharedDataPointer<T> &p1, std::nullptr_t p2)
+{
+    Q_UNUSED(p2);
+    return !p1;
+}
+
 template <class T>
 Q_INLINE_TEMPLATE void qSwap(QSharedDataPointer<T> &p1, QSharedDataPointer<T> &p2)
 { p1.swap(p2); }