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impl Default for &mut str

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kennytm 2018-06-03 00:29:50 +08:00
parent d830f46b77
commit 0ff8d40fa1
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2 changed files with 7 additions and 0 deletions
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1
src/liballoc/tests/str.rs
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@ -1326,6 +1326,7 @@ fn test_str_default() {
t::<&str>(); t::<&str>();
t::<String>(); t::<String>();
t::<&mut str>();
} }
#[test] #[test]

6
src/libcore/str/mod.rs
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@ -3875,6 +3875,12 @@ impl<'a> Default for &'a str {
fn default() -> &'a str { "" } fn default() -> &'a str { "" }
} }
#[stable(feature = "default_mut_str", since = "1.28.0")]
impl<'a> Default for &'a mut str {
/// Creates an empty mutable str
fn default() -> &'a mut str { unsafe { from_utf8_unchecked_mut(&mut []) } }
}
/// An iterator over the non-whitespace substrings of a string, /// An iterator over the non-whitespace substrings of a string,
/// separated by any amount of whitespace. /// separated by any amount of whitespace.
/// ///