返回一个实现Stream的匿名类型,Stream::Item是yield值的类型;try_stream类似,不过Stream::Item是Result<T, Error>,支持?语法,使用方式大致如下: fnzero_to_three()->implStream<Item=u32>{stream!{foriin0..3{yieldi;}}}fnbind_and_accept(addr:SocketAddr)->implStream<Item=io::Result<TcpStream>>{try...
不过for循环并不能用于Stream中,你可以用while let搭配next/try_next来实现循环。 来看个使用例子 async fn sum_with_next(mut stream: Pin<&mut dyn Stream<Item = i32>>) -> i32 { use futures::stream::StreamExt; // for `next` let mut sum = 0; while let Some(item) = stream.next().aw...
使用futures库的TryStreamExt::into_async_read方法 AsyncRead 转换为Stream 方法一: 包装一个自定义的stream let stream = ByteStream(Cursor::new(b"hello world ")); 1. struct ByteStream<R>(R); impl<R: AsyncRead + Unpin> Stream for ByteStream<R> { type Item = Result<Bytes, anyhow::Error>; ...
和同步的Iterator类似,Stream可以迭代处理其中的值,如使用map, filter, fold, try_map, try_filter, and try_fold等。但是Stream不支持使用for,而while let和 next/try_next则...
use futures_util::TryStreamExt;use hyper::service::{make_service_fn,service_fn};use hyper::{Body,Method,Request,Response,Server,StatusCode};asyncfnecho(req:Request<Body>)->Result<Response<Body>,hyper::Error>{letmut response=Response::new(Body::empty());// 通过req.method()和req.uri()....
use criterion::{criterion_group,criterion_main,Criterion};use futures::TryStreamExt;use mongodb::{bson::{doc,Document},Client,};pub fnfind_bench(c:&mut Criterion){// begin setup// create the tokio runtime to be used for the benchmarksletrt=tokio::runtime::Builder::new_multi_thread()...
let (_stream, stream_handle) = OutputStream::try_default().unwrap(); let sink = Sink::try_new(&stream_handle).unwrap(); let source = Decoder::new("audio_file.mp3").unwrap(); sink.append(source); sink.sleep_until_end();
// Query option 1, using row stream. let mut rows = result.rows(); while let Some(row) = rows.try_next().await? { for (name, value) in row { println!("Get the value of {}: {}", name, value); } println!() } // Query option 2, deserialize using serde. ...
trynova/nova - JavaScript engine written entirely in Rust Simulation [simulation] nyx-space - High fidelity, fast, reliable and validated astrodynamical toolkit library, used for spacecraft mission design and orbit determination Social networks Telegram tdilb-rs [tdilb-rs] - Crossplatform Rust ...
I know for a fact that the current async ecosystem with futures::stream::Stream does not have parity with Iterator, with some notable surprises including the fact that try_fold requires the iterator item to also be composed of results, rather than just the return type of the function. It ...