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Remove Err variants of cloned and copied

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This commit is contained in:
ksqsf 2019-08-02 13:58:55 +08:00
parent 9733f0d163
commit 61e5286635
1 changed files with 0 additions and 79 deletions
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79
src/libcore/result.rs
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@ -860,46 +860,6 @@ impl<T: Copy, E> Result<&mut T, E> {
}
}
impl<T, E: Copy> Result<T, &E> {
/// Maps a `Result<T, &E>` to a `Result<T, E>` by copying the contents of the
/// `Err` part.
///
/// # Examples
///
/// ```
/// #![feature(result_copied)]
/// let val = 12;
/// let x: Result<i32, &i32> = Err(&val);
/// assert_eq!(x, Err(&12));
/// let copied = x.copied_err();
/// assert_eq!(copied, Err(12));
/// ```
#[unstable(feature = "result_copied", reason = "newly added", issue = "63168")]
pub fn copied_err(self) -> Result<T, E> {
self.map_err(|&e| e)
}
}
impl<T, E: Copy> Result<T, &mut E> {
/// Maps a `Result<T, &mut E>` to a `Result<T, E>` by copying the contents of the
/// `Err` part.
///
/// # Examples
///
/// ```
/// #![feature(result_copied)]
/// let mut val = 12;
/// let x: Result<i32, &mut i32> = Err(&mut val);
/// assert_eq!(x, Err(&mut 12));
/// let copied = x.copied_err();
/// assert_eq!(copied, Err(12));
/// ```
#[unstable(feature = "result_copied", reason = "newly added", issue = "63168")]
pub fn copied_err(self) -> Result<T, E> {
self.map_err(|&mut e| e)
}
}
impl<T: Clone, E> Result<&T, E> {
/// Maps a `Result<&T, E>` to a `Result<T, E>` by cloning the contents of the
/// `Ok` part.
@ -940,45 +900,6 @@ impl<T: Clone, E> Result<&mut T, E> {
}
}
impl<T, E: Clone> Result<T, &E> {
/// Maps a `Result<T, &E>` to a `Result<T, E>` by cloning the contents of the
/// `Err` part.
///
/// # Examples
///
/// ```
/// #![feature(result_cloned)]
/// let val = 12;
/// let x: Result<i32, &i32> = Err(&val);
/// assert_eq!(x, Err(&12));
/// let cloned = x.cloned_err();
/// assert_eq!(cloned, Err(12));
/// ```
#[unstable(feature = "result_cloned", reason = "newly added", issue = "63168")]
pub fn cloned_err(self) -> Result<T, E> {
self.map_err(|e| e.clone())
}
}
impl<T, E: Clone> Result<T, &mut E> {
/// Maps a `Result<T, &mut E>` to a `Result<T, E>` by cloning the contents of the
/// `Err` part.
///
/// # Examples
///
/// ```
/// #![feature(result_cloned)]
/// let mut val = 12;
/// let x: Result<i32, &mut i32> = Err(&mut val);
/// assert_eq!(x, Err(&mut 12));
/// let cloned = x.cloned_err();
/// assert_eq!(cloned, Err(12));
/// ```
#[unstable(feature = "result_cloned", reason = "newly added", issue = "63168")]
pub fn cloned_err(self) -> Result<T, E> {
self.map_err(|e| e.clone())
}
}
impl<T, E: fmt::Debug> Result<T, E> {
/// Unwraps a result, yielding the content of an [`Ok`].