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mark std::str::replacen and std::str::replace as #[must_use].
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matthiaskrgr committed Apr 23, 2018
1 parent 4640615 commit 5d37ba1
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1 change: 1 addition & 0 deletions src/liballoc/lib.rs
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Expand Up @@ -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)]
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2 changes: 2 additions & 0 deletions src/liballoc/str.rs
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Expand Up @@ -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 {
Expand Down Expand Up @@ -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
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