From 3e86cf36b5114f201868bf459934fe346a76a2d4 Mon Sep 17 00:00:00 2001
From: Kyle Huey <khuey@kylehuey.com>
Date: Fri, 19 Apr 2019 21:13:37 -0700
Subject: Add implementations of last in terms of next_back on a bunch of
 DoubleEndedIterators.

r?Manishearth
---
 src/libstd/sys/unix/args.rs    | 2 ++
 src/libstd/sys/wasm/args.rs    | 4 ++++
 src/libstd/sys/windows/args.rs | 2 ++
 3 files changed, 8 insertions(+)

(limited to 'src/libstd/sys')

diff --git a/src/libstd/sys/unix/args.rs b/src/libstd/sys/unix/args.rs
index 18de1096df2..f0594bb21bd 100644
--- a/src/libstd/sys/unix/args.rs
+++ b/src/libstd/sys/unix/args.rs
@@ -35,6 +35,8 @@ impl Iterator for Args {
     type Item = OsString;
     fn next(&mut self) -> Option<OsString> { self.iter.next() }
     fn size_hint(&self) -> (usize, Option<usize>) { self.iter.size_hint() }
+    #[inline]
+    fn last(mut self) -> Option<OsString> { self.next_back() }
 }
 
 impl ExactSizeIterator for Args {
diff --git a/src/libstd/sys/wasm/args.rs b/src/libstd/sys/wasm/args.rs
index b3c77b86995..6766099c1ec 100644
--- a/src/libstd/sys/wasm/args.rs
+++ b/src/libstd/sys/wasm/args.rs
@@ -37,6 +37,10 @@ impl Iterator for Args {
     fn size_hint(&self) -> (usize, Option<usize>) {
         self.iter.size_hint()
     }
+    #[inline]
+    fn last(mut self) -> Option<OsString> {
+        self.next_back()
+    }
 }
 
 impl ExactSizeIterator for Args {
diff --git a/src/libstd/sys/windows/args.rs b/src/libstd/sys/windows/args.rs
index b04bb484eed..744d7ec59d3 100644
--- a/src/libstd/sys/windows/args.rs
+++ b/src/libstd/sys/windows/args.rs
@@ -181,6 +181,8 @@ impl Iterator for Args {
     type Item = OsString;
     fn next(&mut self) -> Option<OsString> { self.parsed_args_list.next() }
     fn size_hint(&self) -> (usize, Option<usize>) { self.parsed_args_list.size_hint() }
+    #[inline]
+    fn last(mut self) -> Option<OsString> { self.next_back() }
 }
 
 impl DoubleEndedIterator for Args {
-- 
cgit 1.4.1-3-g733a5