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Make the closure take a borrow to the value

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This commit is contained in:
Felipe Sere 2019-11-11 09:13:57 +01:00
parent bfb42b432e
commit 7677e9a3df
1 changed files with 6 additions and 6 deletions
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12
src/stream/successors.rs
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@ -18,7 +18,7 @@ use pin_project_lite::pin_project;
/// use async_std::prelude::*;
/// use async_std::stream;
///
/// let s = stream::successors(Some(22), |val| {
/// let s = stream::successors(Some(22), |&val| {
/// async move {
/// Some(val + 1)
/// }
@ -31,9 +31,9 @@ use pin_project_lite::pin_project;
/// assert_eq!(s.next().await, Some(25));
///
///
///let never = stream::successors(None, |val: usize| {
///let never = stream::successors(None, |_| {
/// async move {
/// Some(val + 1)
/// Some(1)
/// }
/// });
///
@ -48,7 +48,7 @@ use pin_project_lite::pin_project;
#[cfg_attr(feature = "docs", doc(cfg(unstable)))]
pub fn successors<F, Fut, T>(first: Option<T>, succ: F) -> Successors<F, Fut, T>
where
F: FnMut(T) -> Fut,
F: FnMut(&T) -> Fut,
Fut: Future<Output = Option<T>>,
T: Copy,
{
@ -83,7 +83,7 @@ pin_project! {
impl<F, Fut, T> Stream for Successors<F, Fut, T>
where
Fut: Future<Output = Option<T>>,
F: FnMut(T) -> Fut,
F: FnMut(&T) -> Fut,
T: Copy,
{
type Item = T;
@ -96,7 +96,7 @@ where
}
if this.future.is_none() {
let fut = (this.succ)(this.slot.unwrap());
let fut = (this.succ)(&this.slot.unwrap());
this.future.set(Some(fut));
}