From c21e25c2622c2a7294189ddc545a0cb9c621631a Mon Sep 17 00:00:00 2001
From: Bastian Kauschke <bastian_kauschke@hotmail.de>
Date: Thu, 26 Mar 2020 10:52:52 +0100
Subject: [PATCH] simplify match stmt

---
 src/librustc_ast_passes/ast_validation.rs | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/src/librustc_ast_passes/ast_validation.rs b/src/librustc_ast_passes/ast_validation.rs
index c03c44fc634ce..d6d1153f2790f 100644
--- a/src/librustc_ast_passes/ast_validation.rs
+++ b/src/librustc_ast_passes/ast_validation.rs
@@ -289,11 +289,7 @@ impl<'a> AstValidator<'a> {
         match expr.kind {
             ExprKind::Lit(..) | ExprKind::Err => {}
             ExprKind::Path(..) if allow_paths => {}
-            ExprKind::Unary(UnOp::Neg, ref inner)
-                if match inner.kind {
-                    ExprKind::Lit(_) => true,
-                    _ => false,
-                } => {}
+            ExprKind::Unary(UnOp::Neg, ref inner) if matches!(inner.kind, ExprKind::Lit(_)) => {}
             _ => self.err_handler().span_err(
                 expr.span,
                 "arbitrary expressions aren't allowed \