cid#1371142: Move semantics for css::uno::WeakReferenceHelper

Change-Id: I442b2d8061bd7d50cbf832b345a7a63461e26224

cppuhelper/source/gcc3.map

@@ -430,6 +430,11 @@ global:
     _ZN4cppu15supportsServiceEPN3com3sun4star4lang12XServiceInfoERKN3rtl8OUStringE; # cppu::supportsService(com::sun::star::lang::XServiceInfo*, rtl::OUString const&)
 } UDK_3.8;
 
+LIBO_UDK_5.3 { # LibO 5.3
+global:
+    _ZN3com3sun4star3uno19WeakReferenceHelperaSEOS3_; # com::sun::star::uno::WeakReferenceHelper::operator=(com::sun::star::uno::WeakReferenceHelper&&)
+} LIBO_UDK_3.9;
+
 # Unique libstdc++ symbols:
 GLIBCXX_3.4 {
     global:

cppuhelper/source/weak.cxx

@@ -24,7 +24,9 @@
 #include <cppuhelper/interfacecontainer.hxx>
 #include <cppuhelper/exc_hlp.hxx>
 #include <cppuhelper/queryinterface.hxx>
+
 #include <algorithm>
+#include <utility>
 
 using namespace osl;
 using namespace com::sun::star::uno;
@@ -485,6 +487,14 @@ WeakReferenceHelper& WeakReferenceHelper::operator=(const WeakReferenceHelper& r
     return operator = ( xInt );
 }
 
+WeakReferenceHelper & WeakReferenceHelper::operator =(
+    WeakReferenceHelper && other)
+{
+    clear();
+    std::swap(m_pImpl, other.m_pImpl);
+    return *this;
+}
+
 WeakReferenceHelper & SAL_CALL
 WeakReferenceHelper::operator= (const Reference< XInterface > & xInt)
 {

include/cppuhelper/weakref.hxx

@@ -63,6 +63,11 @@ public:
     */
     WeakReferenceHelper( const WeakReferenceHelper & rWeakRef );
 
+#if defined LIBO_INTERNAL_ONLY
+    WeakReferenceHelper(WeakReferenceHelper && other): m_pImpl(other.m_pImpl)
+    { other.m_pImpl = nullptr; }
+#endif
+
     /** Initialize this reference with the hard interface reference xInt. If the implementation
         behind xInt does not support XWeak or xInt is null then this reference will be null.
 
@@ -80,6 +85,10 @@ public:
     */
     WeakReferenceHelper & SAL_CALL operator = ( const WeakReferenceHelper & rWeakRef );
 
+#if defined LIBO_INTERNAL_ONLY
+    WeakReferenceHelper & operator =(WeakReferenceHelper && other);
+#endif
+
     /** Releases this reference and takes over hard reference xInt.
         If the implementation behind xInt does not support XWeak
         or XInt is null, then this reference is null.