127 Label::Binding::Binding() : base_(this), addend_(), reference_count_(1) { }  in Binding()
130     : base_(NULL), addend_(addend), reference_count_(1) { }  in Binding()
134   if (base_ && base_ != this && base_->Release())  in ~Binding()
135     delete base_;  in ~Binding()
139   if (!base_ && !binding) {  in Set()
142   } else if (!base_) {  in Set()
163     if (base_ != this) {  in Set()
169       base_->Set(binding, addend - addend_);  in Set()
171       if (base_->Release()) delete base_;  in Set()
181     base_ = binding;  in Set()
187   if (base_ && base_ != this) {  in Get()
194     base_->Get(&final_base, &final_addend);  in Get()
196     if (base_->Release()) delete base_;  in Get()
197     base_ = final_base;  in Get()
200   *base = base_;  in Get()