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Add doc example to str::from_boxed_utf8_unchecked

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Fixes #44463.
This commit is contained in:
Tommy Ip 2017-09-11 17:28:28 +01:00
parent 19d30fcdb2
commit ede6dfd72a
1 changed files with 11 additions and 0 deletions
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11
src/liballoc/str.rs
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@ -2050,6 +2050,17 @@ impl str {
/// Converts a boxed slice of bytes to a boxed string slice without checking /// Converts a boxed slice of bytes to a boxed string slice without checking
/// that the string contains valid UTF-8. /// that the string contains valid UTF-8.
///
/// # Examples
///
/// Basic usage:
///
/// ```
/// let smile_utf8 = Box::new([226, 152, 186]);
/// let smile = unsafe { std::str::from_boxed_utf8_unchecked(smile_utf8) };
///
/// assert_eq!("☺", &*smile);
/// ```
#[stable(feature = "str_box_extras", since = "1.20.0")] #[stable(feature = "str_box_extras", since = "1.20.0")]
pub unsafe fn from_boxed_utf8_unchecked(v: Box<[u8]>) -> Box<str> { pub unsafe fn from_boxed_utf8_unchecked(v: Box<[u8]>) -> Box<str> {
mem::transmute(v) mem::transmute(v)