rust之async
有两种使用方式:async fn和
async,每个返回执行future特性的值。
1 // `foo()` returns a type that implements `Future<Output = u8>`. 2 // `foo().await` will result in a value of type `u8`. 3 async fn foo() -> u8 { 5 } 4 5 fn bar() -> impl Future<Output = u8> { 6 // This `async` block results in a type that implements 7 // `Future<Output = u8>`. 8 async { 9 let x: u8 = foo().await; 10 x + 5 11 } 12 }
async生命周期
async move
Asynchronous Programming in Rust