/// rearrange itself when the pointer changes). Unlike ValueHandleBase, this
/// class has a vtable and a virtual destructor.
class CallbackVH : public ValueHandleBase {
+ virtual void anchor();
protected:
CallbackVH(const CallbackVH &RHS)
: ValueHandleBase(Callback, RHS) {}
///
/// All implementations must remove the reference from this object to the
/// Value that's being destroyed.
- virtual void deleted();
+ virtual void deleted() { setValPtr(NULL); }
/// Called when this->getValPtr()->replaceAllUsesWith(new_value) is called,
/// _before_ any of the uses have actually been replaced. If WeakVH were
/// implemented as a CallbackVH, it would use this method to call
/// setValPtr(new_value). AssertingVH would do nothing in this method.
- virtual void allUsesReplacedWith(Value *);
+ virtual void allUsesReplacedWith(Value *) {}
};
} // End llvm namespace