-impl LintPass for Pass {
- fn get_lints(&self) -> LintArray {
- lint_array!(NEEDLESS_UPDATE)
- }
-}
-
-impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Pass {
- fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr) {
- if let ExprKind::Struct(_, ref fields, Some(ref base)) = expr.node {
- let ty = cx.tables.expr_ty(expr);
- if let ty::Adt(def, _) = ty.sty {
- if fields.len() == def.non_enum_variant().fields.len() {
+impl<'tcx> LateLintPass<'tcx> for NeedlessUpdate {
+ fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
+ if let ExprKind::Struct(_, ref fields, Some(ref base)) = expr.kind {
+ let ty = cx.typeck_results().expr_ty(expr);
+ if let ty::Adt(def, _) = ty.kind() {
+ if fields.len() == def.non_enum_variant().fields.len()
+ && !def.variants[0_usize.into()].is_field_list_non_exhaustive()
+ {