6 releases (breaking)
0.7.0 | Jun 18, 2022 |
---|---|
0.6.1 | Jun 18, 2022 |
0.6.0 | Jan 29, 2022 |
0.4.0 | Nov 11, 2021 |
0.2.0 | Nov 9, 2021 |
#19 in #dynamic-dispatch
30 downloads per month
Used in 2 crates
(via async_t)
24KB
551 lines
async_t
This library allows for zero-cost compile-time async-traits.
This library needs nightly and features generic_associated_types
and type_alias_impl_trait
to be enabled.
Compiling in stable will automatically use dtolnay's async_trait instead.
It supports everything a normal trait would except:
- default async methods
- blanket implementations
- dynamic dispatch
It can also have problems with lifetimes where they have to be specified.
// spawn example
#[async_trait]
trait Spawn {
// supports self, &self, &mut self and no self
async fn spawn() -> JoinHandle<()>;
}
#[async_trait]
impl Spawn for Spawner {
async fn spawn() -> JoinHandle<()> {
task::spawn(async {
// ...
})
}
}
async fn spawn<T: Spawn>() -> JoinHandle<()> {
T::spawn().await
}
#[async_trait]
trait Sleeper {
#[unsend]
async fn sleep<T>(t: T) -> T;
}
#[async_trait]
impl Sleeper for () {
#[unsend]
async fn sleep<T>(t: T) -> T {
task::sleep(Duration::from_secs(2)).await;
t
}
}
Dependencies
~1.5MB
~36K SLoC