async yet?For async syntax, not yet, but progress is being made!
Although the more ergonomic syntax is not ready yet, asynchronous I/O is already possible in Rust with ecosystem around futures, mio, and tokio.
async syntax and blockersasync/await syntax
not stabilized yet
/
RFC 2394
/
#50547
await syntax
Fn closure
async move breaks doc tests
await syntax
impl Trait captures lifetime that does not appear in bounds
async fn doesn't capture lifetimes of type parameters if other lifetimes are present
async fn inside inherent impl produces generic parse error on 2015 edition
for<'r> 'r : 'static is not satisfied” with 'static across await point
std::task and std::future
stabilized in 1.36
[in nightly]
/
RFC 2592
/
#59113
Pin as a method receiver
stabilized in 1.33
[in stable]
/
RFC 2362
/
#55786
async as a keyword in 2018 edition
stabilized in 1.28
[in stable]
impl Trait in return position
stabilized in 1.26
[in stable]
/
RFC 1522
/
#34511
impl_trait_in_bindings when Wrapped
#![feature(existential_type)] + closure
impl Generator
existential type defined by associated type
cargo check but fails with cargo build
Captures trait
impl Trait
impl_trait_in_bindings fails with Option<impl Trait>
impl Trait consts/statics that use generics
impl Trait should be able to capture long-lived associated types even if the trait contains a lifetime
existential type can accept generic bounds that do not specify a trait
impl trait-parameter on trait implementation
impl Trait Associated Types Do Not Leak Auto Traits
impl Trait requires a named lifetime
impl Trait after -> in fn types or parentheses sugar?
impl Trait messages should point out the reason
'static when used with AsRef.
<Thing as FromStr>::Err == <Thing as FromStr>::Err, with impl trait
impl Trait fails to resolve when returning !
? lowering for existentials
-> impl Fn() fails with closures used as FnMut but actually Fn
impl Trait return type
impl Iterator<Item = &&'a str>
impl Trait
...
impl Trait of a trait with a generic parameter with a default type of Self
'static is probably confusing
impl FnOnce... in argument position. Unexpected panic.
<encoder::EncodeContext as SpecializedEncoder<rustc::hir::def_id::LocalDefId>>::specialized_encode not overriden
impl Iterator<Item = &'a Path> + 'a
librustc_trans_utils/collector.rs:743: Cannot create local trans-item for DefId(11/0:54 ~ stpl[d907]::html[0]::h1[0])
impl Trait.
impl Trait, while expanding it to arguments
await expression
unresolved
async ecosystemasync/await support provided behind
the async-await-preview feature flag.
/ #804
async/await syntax
to enable people to experiment with the new syntax.
async/await syntax.
async