From ca79ba300a0934864d6ea520f9424d5f08ece687 Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Thu, 19 Apr 2018 15:52:14 -0700
Subject: Tweak some stabilizations in libstd

This commit tweaks a few stable APIs in the `beta` branch before they hit
stable. The `str::is_whitespace` and `str::is_alphanumeric` functions were
deleted (added in #49381, issue at #49657). The `and_modify` APIs added
in #44734 were altered to take a `FnOnce` closure rather than a `FnMut` closure.

Closes #49581
Closes #49657
---
 src/liballoc/btree/map.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'src/liballoc/btree')

diff --git a/src/liballoc/btree/map.rs b/src/liballoc/btree/map.rs
index 82cbec0517e..3984379ea86 100644
--- a/src/liballoc/btree/map.rs
+++ b/src/liballoc/btree/map.rs
@@ -2155,8 +2155,8 @@ impl<'a, K: Ord, V> Entry<'a, K, V> {
     /// assert_eq!(map["poneyland"], 43);
     /// ```
     #[stable(feature = "entry_and_modify", since = "1.26.0")]
-    pub fn and_modify<F>(self, mut f: F) -> Self
-        where F: FnMut(&mut V)
+    pub fn and_modify<F>(self, f: F) -> Self
+        where F: FnOnce(&mut V)
     {
         match self {
             Occupied(mut entry) => {
-- 
cgit 1.4.1-3-g733a5