nordic-dev.net/rust
nordic-dev.net/rust
2
0
Fork 0
mirror of https://github.com/rust-lang/rust.git synced 2024-11-01 06:51:58 +00:00
Code Issues Packages Projects Releases Wiki Activity

libcore: make result type of iter::from_generator concrete

Browse Source 
This allows for propagating trait impls on the iterator type.
This commit is contained in:
Xiretza 2022-12-10 09:27:07 +01:00
parent 0d5573e6da
commit a8b5d4b7f1
1 changed files with 18 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
library/core/src/iter/sources/from_generator.rs
View File

@ -1,3 +1,4 @@
use crate::fmt;
use crate::ops::{Generator, GeneratorState};
use crate::pin::Pin;
@ -23,14 +24,20 @@ use crate::pin::Pin;
/// ```
#[inline]
#[unstable(feature = "iter_from_generator", issue = "43122", reason = "generators are unstable")]
pub fn from_generator<G: Generator<Return = ()> + Unpin>(
generator: G,
) -> impl Iterator<Item = G::Yield> {
pub fn from_generator<G: Generator<Return = ()> + Unpin>(generator: G) -> FromGenerator<G> {
FromGenerator(generator)
}
struct FromGenerator<G>(G);
/// An iterator over the values yielded by an underlying generator.
///
/// This `struct` is created by the [`iter::from_generator()`] function. See its documentation for
/// more.
///
/// [`iter::from_generator()`]: from_generator
#[unstable(feature = "iter_from_generator", issue = "43122", reason = "generators are unstable")]
pub struct FromGenerator<G>(G);
#[unstable(feature = "iter_from_generator", issue = "43122", reason = "generators are unstable")]
impl<G: Generator<Return = ()> + Unpin> Iterator for FromGenerator<G> {
type Item = G::Yield;
@ -41,3 +48,10 @@ impl<G: Generator<Return = ()> + Unpin> Iterator for FromGenerator<G> {
}
}
}
#[unstable(feature = "iter_from_generator", issue = "43122", reason = "generators are unstable")]
impl<G> fmt::Debug for FromGenerator<G> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("FromGenerator").finish()
}
}