From 642da6e12ae337928fcc0dc9f0c84436a0954f85 Mon Sep 17 00:00:00 2001
From: Guanqun Lu <guanqun.lu@gmail.com>
Date: Mon, 21 Oct 2019 14:18:09 +0800
Subject: [PATCH] use unwrap_or in lint code

---
 src/librustc/lint/levels.rs | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/src/librustc/lint/levels.rs b/src/librustc/lint/levels.rs
index 60b1b192d10db..8ed06cbdc7623 100644
--- a/src/librustc/lint/levels.rs
+++ b/src/librustc/lint/levels.rs
@@ -202,11 +202,7 @@ impl<'a> LintLevelsBuilder<'a> {
             let meta = unwrap_or!(attr.meta(), continue);
             attr::mark_used(attr);
 
-            let mut metas = if let Some(metas) = meta.meta_item_list() {
-                metas
-            } else {
-                continue;
-            };
+            let mut metas = unwrap_or!(meta.meta_item_list(), continue);
 
             if metas.is_empty() {
                 // FIXME (#55112): issue unused-attributes lint for `#[level()]`