From c93198f90ea6673aaaa8984e527602f5f6873f48 Mon Sep 17 00:00:00 2001
From: Lzu Tao <taolzu@gmail.com>
Date: Sat, 21 Dec 2019 16:48:35 +0000
Subject: [PATCH] use _val to ignore parameter of any::type_name_of_val

---
 src/libcore/any.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/libcore/any.rs b/src/libcore/any.rs
index 882c4a53faf2a..a2aa6b3fea50c 100644
--- a/src/libcore/any.rs
+++ b/src/libcore/any.rs
@@ -496,7 +496,6 @@ pub const fn type_name<T: ?Sized>() -> &'static str {
 /// ```
 #[unstable(feature = "type_name_of_val", issue = "66359")]
 #[rustc_const_unstable(feature = "const_type_name", issue = "63084")]
-pub const fn type_name_of_val<T: ?Sized>(val: &T) -> &'static str {
-    let _ = val;
+pub const fn type_name_of_val<T: ?Sized>(_val: &T) -> &'static str {
     type_name::<T>()
 }