{"ast_node_type":"variable","tokens":[{"end":106,"kind":"keyword","start":0,"text":"let"}]}
                let cond = self.context.new_comparison(self.location, ComparisonOp::Equals, masked, mask);
                let masked = mask & self.context.new_unary_op(self.location, UnaryOp::BitwiseNegate, arg_type, arg);
                let diff = diff * self.context.new_cast(self.location, cond, self.int_type);