{"ast_node_type":"variable","tokens":[{"end":92,"kind":"keyword","start":0,"text":"let"}]}
                let diff = diff * self.context.new_cast(self.location, cond, self.int_type);
                let cond = self.context.new_comparison(self.location, ComparisonOp::Equals, masked, mask);
                let res = self.context.new_call(self.location, count_trailing_zeroes, &[casted_arg]) - diff;