impl<'a, 'tcx> LateLintPass<'a, 'tcx> for NeedlessUpdate {
fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr) {
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for NeedlessUpdate {
fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr) {