Move-enable QPixmapCache::Key

The default constructor already sets the d-pointer to nullptr,
so the move constructor does not introduce a new state.

Change-Id: Icd47952bdf76d2106992d6babea40d68f18d067e
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/gui/image/qpixmapcache.h b/src/gui/image/qpixmapcache.h
index fd57407c04..03311345a2 100644
--- a/src/gui/image/qpixmapcache.h
+++ b/src/gui/image/qpixmapcache.h
@@ -48,12 +48,18 @@ public:
     public:
         Key();
         Key(const Key &other);
+#ifdef Q_COMPILER_RVALUE_REFS
+        Key(Key &&other) Q_DECL_NOTHROW : d(other.d) { other.d = Q_NULLPTR; }
+        Key &operator =(Key &&other) Q_DECL_NOTHROW { swap(other); return *this; }
+#endif
         ~Key();
         bool operator ==(const Key &key) const;
         inline bool operator !=(const Key &key) const
         { return !operator==(key); }
         Key &operator =(const Key &other);
 
+        void swap(Key &other) Q_DECL_NOTHROW { qSwap(d, other.d); }
+
     private:
         KeyData *d;
         friend class QPMCache;