Trait std::convert::AsRef
[−]
[src]
pub trait AsRef<T> where T: ?Sized {
fn as_ref(&self) -> &T;
}
A cheap, reference-to-reference conversion.
AsRef
is very similar to, but different than, Borrow
. See
the book for more.
Examples
Both String
and &str
implement AsRef<str>
:
fn is_hello<T: AsRef<str>>(s: T) { assert_eq!("hello", s.as_ref()); } let s = "hello"; is_hello(s); let s = "hello".to_string(); is_hello(s);
Required Methods
fn as_ref(&self) -> &T
Performs the conversion.
Implementors
impl<'a, T, U> AsRef<U> for &'a T where T: AsRef<U> + ?Sized, U: ?Sized
impl<'a, T, U> AsRef<U> for &'a mut T where U: ?Sized, T: AsRef<U> + ?Sized
impl<T> AsRef<[T]> for [T]
impl AsRef<str> for str
impl<T> AsRef<[T]> for [T; 0]
impl<T> AsRef<[T]> for [T; 1]
impl<T> AsRef<[T]> for [T; 2]
impl<T> AsRef<[T]> for [T; 3]
impl<T> AsRef<[T]> for [T; 4]
impl<T> AsRef<[T]> for [T; 5]
impl<T> AsRef<[T]> for [T; 6]
impl<T> AsRef<[T]> for [T; 7]
impl<T> AsRef<[T]> for [T; 8]
impl<T> AsRef<[T]> for [T; 9]
impl<T> AsRef<[T]> for [T; 10]
impl<T> AsRef<[T]> for [T; 11]
impl<T> AsRef<[T]> for [T; 12]
impl<T> AsRef<[T]> for [T; 13]
impl<T> AsRef<[T]> for [T; 14]
impl<T> AsRef<[T]> for [T; 15]
impl<T> AsRef<[T]> for [T; 16]
impl<T> AsRef<[T]> for [T; 17]
impl<T> AsRef<[T]> for [T; 18]
impl<T> AsRef<[T]> for [T; 19]
impl<T> AsRef<[T]> for [T; 20]
impl<T> AsRef<[T]> for [T; 21]
impl<T> AsRef<[T]> for [T; 22]
impl<T> AsRef<[T]> for [T; 23]
impl<T> AsRef<[T]> for [T; 24]
impl<T> AsRef<[T]> for [T; 25]
impl<T> AsRef<[T]> for [T; 26]
impl<T> AsRef<[T]> for [T; 27]
impl<T> AsRef<[T]> for [T; 28]
impl<T> AsRef<[T]> for [T; 29]
impl<T> AsRef<[T]> for [T; 30]
impl<T> AsRef<[T]> for [T; 31]
impl<T> AsRef<[T]> for [T; 32]
impl AsRef<[u8]> for str
impl<T> AsRef<T> for Box<T> where T: ?Sized
impl<T> AsRef<T> for Arc<T> where T: ?Sized
impl<T> AsRef<T> for Rc<T> where T: ?Sized
impl<'a, T> AsRef<T> for Cow<'a, T> where T: ToOwned + ?Sized
impl AsRef<str> for String
impl AsRef<[u8]> for String
impl<T> AsRef<Vec<T>> for Vec<T>
impl<T> AsRef<[T]> for Vec<T>
impl AsRef<Path> for str
impl AsRef<Path> for String
impl AsRef<Path> for PathBuf