From b6321bd13362d69dc0bc4a1ca8416d58b0ff63d2 Mon Sep 17 00:00:00 2001
From: Eugene Bulkin <ebulkin@caltech.edu>
Date: Wed, 14 Sep 2016 17:13:06 -0700
Subject: [PATCH] Add feature crate attribute for duration_checked_ops to docs

---
 src/libstd/time/duration.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/libstd/time/duration.rs b/src/libstd/time/duration.rs
index 6931c8d63152..246c57ab2387 100644
--- a/src/libstd/time/duration.rs
+++ b/src/libstd/time/duration.rs
@@ -106,6 +106,8 @@ impl Duration {
     /// Basic usage:
     ///
     /// ```
+    /// #![feature(duration_checked_ops)]
+    ///
     /// use std::time::Duration;
     ///
     /// assert_eq!(Duration::new(0, 0).checked_add(Duration::new(0, 1)), Some(Duration::new(0, 1)));
@@ -142,6 +144,8 @@ impl Duration {
     /// Basic usage:
     ///
     /// ```
+    /// #![feature(duration_checked_ops)]
+    ///
     /// use std::time::Duration;
     ///
     /// assert_eq!(Duration::new(0, 1).checked_sub(Duration::new(0, 0)), Some(Duration::new(0, 1)));
@@ -176,6 +180,8 @@ impl Duration {
     /// Basic usage:
     ///
     /// ```
+    /// #![feature(duration_checked_ops)]
+    ///
     /// use std::time::Duration;
     ///
     /// assert_eq!(Duration::new(0, 500_000_001).checked_mul(2), Some(Duration::new(1, 2)));
@@ -209,6 +215,8 @@ impl Duration {
     /// Basic usage:
     ///
     /// ```
+    /// #![feature(duration_checked_ops)]
+    ///
     /// use std::time::Duration;
     ///
     /// assert_eq!(Duration::new(2, 0).checked_div(2), Some(Duration::new(1, 0)));