From 5d37ba1990bdc552694383d2a3c6cbeb72b77f49 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Matthias=20Kr=C3=BCger?= Date: Mon, 23 Apr 2018 13:04:37 +0200 Subject: [PATCH] mark std::str::replacen and std::str::replace as #[must_use]. --- src/liballoc/lib.rs | 1 + src/liballoc/str.rs | 2 ++ 2 files changed, 3 insertions(+) diff --git a/src/liballoc/lib.rs b/src/liballoc/lib.rs index 6399be98cd519..021395d0c824a 100644 --- a/src/liballoc/lib.rs +++ b/src/liballoc/lib.rs @@ -96,6 +96,7 @@ #![feature(dropck_eyepatch)] #![feature(exact_size_is_empty)] #![feature(fmt_internals)] +#![feature(fn_must_use)] #![feature(from_ref)] #![feature(fundamental)] #![feature(lang_items)] diff --git a/src/liballoc/str.rs b/src/liballoc/str.rs index 82ba2f4571193..e8c6b964c700d 100644 --- a/src/liballoc/str.rs +++ b/src/liballoc/str.rs @@ -207,6 +207,7 @@ impl str { /// let s = "this is old"; /// assert_eq!(s, s.replace("cookie monster", "little lamb")); /// ``` + #[must_use] #[stable(feature = "rust1", since = "1.0.0")] #[inline] pub fn replace<'a, P: Pattern<'a>>(&'a self, from: P, to: &str) -> String { @@ -246,6 +247,7 @@ impl str { /// let s = "this is old"; /// assert_eq!(s, s.replacen("cookie monster", "little lamb", 10)); /// ``` + #[must_use] #[stable(feature = "str_replacen", since = "1.16.0")] pub fn replacen<'a, P: Pattern<'a>>(&'a self, pat: P, to: &str, count: usize) -> String { // Hope to reduce the times of re-allocation