From 8141e14ace684b6e29ba4ef695a20b0c731b6621 Mon Sep 17 00:00:00 2001
From: Luro02 <24826124+Luro02@users.noreply.github.com>
Date: Sat, 12 Oct 2019 17:49:25 +0200
Subject: [PATCH] constify len and is_empty

---
 src/liballoc/string.rs | 4 ++--
 src/liballoc/vec.rs    | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/liballoc/string.rs b/src/liballoc/string.rs
index 639124e26cc20..ccaf0bae56736 100644
--- a/src/liballoc/string.rs
+++ b/src/liballoc/string.rs
@@ -1380,7 +1380,7 @@ impl String {
     /// ```
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn len(&self) -> usize {
+    pub const fn len(&self) -> usize {
         self.vec.len()
     }
 
@@ -1399,7 +1399,7 @@ impl String {
     /// ```
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn is_empty(&self) -> bool {
+    pub const fn is_empty(&self) -> bool {
         self.len() == 0
     }
 
diff --git a/src/liballoc/vec.rs b/src/liballoc/vec.rs
index 6350b189c5faa..82f6653c4ca0f 100644
--- a/src/liballoc/vec.rs
+++ b/src/liballoc/vec.rs
@@ -1271,7 +1271,7 @@ impl<T> Vec<T> {
     /// ```
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn len(&self) -> usize {
+    pub const fn len(&self) -> usize {
         self.len
     }
 
@@ -1287,7 +1287,7 @@ impl<T> Vec<T> {
     /// assert!(!v.is_empty());
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
-    pub fn is_empty(&self) -> bool {
+    pub const fn is_empty(&self) -> bool {
         self.len() == 0
     }