Implement Clone::clone_from for Result.
This commit is contained in:
parent
cb12460467
commit
67fd99589a
1 changed files with 22 additions and 1 deletions
|
@ -240,7 +240,7 @@ use crate::ops::{self, Deref};
|
|||
///
|
||||
/// [`Ok`]: enum.Result.html#variant.Ok
|
||||
/// [`Err`]: enum.Result.html#variant.Err
|
||||
#[derive(Clone, Copy, PartialEq, PartialOrd, Eq, Ord, Debug, Hash)]
|
||||
#[derive(Copy, PartialEq, PartialOrd, Eq, Ord, Debug, Hash)]
|
||||
#[must_use = "this `Result` may be an `Err` variant, which should be handled"]
|
||||
#[stable(feature = "rust1", since = "1.0.0")]
|
||||
pub enum Result<T, E> {
|
||||
|
@ -1003,6 +1003,27 @@ fn unwrap_failed<E: fmt::Debug>(msg: &str, error: E) -> ! {
|
|||
// Trait implementations
|
||||
/////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
#[stable(feature = "rust1", since = "1.0.0")]
|
||||
impl<T: Clone, E: Clone> Clone for Result<T, E> {
|
||||
#[inline]
|
||||
fn clone(&self) -> Self {
|
||||
match self {
|
||||
Ok(x) => Ok(x.clone()),
|
||||
Err(x) => Err(x.clone()),
|
||||
}
|
||||
}
|
||||
|
||||
#[inline]
|
||||
fn clone_from(&mut self, source: &Self) {
|
||||
match (self, source) {
|
||||
(Ok(to), Ok(from)) => to.clone_from(from),
|
||||
(Err(to), Err(from)) => to.clone_from(from),
|
||||
(to, from) => *to = from.clone(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
#[stable(feature = "rust1", since = "1.0.0")]
|
||||
impl<T, E> IntoIterator for Result<T, E> {
|
||||
type Item = T;
|
||||
|
|
Loading…
Reference in a new issue