Re-add (user defined) move ops to UnresolvedSetImpl to allow UnresolvedSet to be implicitly movable

llvm-svn: 263747

clang/include/clang/AST/UnresolvedSet.h

@@ -63,6 +63,10 @@ private:
   UnresolvedSetImpl(const UnresolvedSetImpl &) = default;
   UnresolvedSetImpl &operator=(const UnresolvedSetImpl &) = default;
 
+  // FIXME: Switch these to "= default" once MSVC supports generating move ops
+  UnresolvedSetImpl(UnresolvedSetImpl &&) {}
+  UnresolvedSetImpl &operator=(UnresolvedSetImpl &&) { return *this; }
+
 public:
   // We don't currently support assignment through this iterator, so we might
   // as well use the same implementation twice.