usestd::fs::File;usestd::io::{BufReader,BufRead};fn read_file_line_by_line(path:&str)->Result<(),Box<dyn std::error::Error>>{ letfile=File::open(path)?;let reader=BufReader::new(file);forlineinreader.lines(){matchline {// line是字符串Ok(line)=>process_line(line),Err(err)...
("write: {}",*guard);})}; reader.join().unwrap(); writer.join().unwrap();}// 输出结果：// read: 0// write: 1在这个实现中，trait TimeoutRwLock中定义了一个read_timeout方法，它与try_read方法具有相同的输入参数类型和输出类型。default impl方法是一个尝试在给定的等待时间内获取读...
#[derive(Parser)]struct Cli{/// 要查找的模式pattern:String,/// 要读取的文件的路径path:std::path::PathBuf,}fnmain(
("{}", String::from_utf8_lossy(&buf[0..len])); } 3、使用BufReader结构 usestd::fs::File;usestd::io::{BufRead, BufReader};letmutfile: File = File::open("foo.txt").unwrap();letmutreader: BufReader<File> = BufReader::new(file);// 向缓冲区写入数据letbuf: &[u8] = reader....
use tokio::fs::File;use tokio::io::{self,AsyncBufReadExt,AsyncWriteExt,BufReader,BufWriter};#[tokio::main]asyncfnmain()-> io::Result<()>{letmutfile=File::open("test.txt").await?;letmutreader=BufReader::new(file);letmutwriter=BufWriter::new(io::stdout());letmutline=String::new(...
async fn handle_connection(socket: TcpStream, channel: Channel) {let reader = Arc::new(socket);let writer = reader.clone();let read_task = task::spawn(async move {whilelet Some(line_in) in parse_line(&reader).await { broadcast_line(line_in); } }); loop {// `channel...
task::spawn({ async move { let render_pause = Duration::from_millis(30); let mut render_deadline = None; let mut buf = [u8; 65536]; let mut async_reader = AsyncFileReader::new(pid); // 用async_std实现异步IO//以下是异步实现在deadline时进行特殊处理 loop { ...
let mut buf = String::new(); println!("Waiting for query..."); reader.read_line(&mut buf).unwrap(); println!("> Received query: {}", buf); 本站已为你智能检索到如下内容,以供参考: 🐻 相关问答3个 1、为什么异步TcpStream会阻塞?2、Rust TcpStream 连接返回乱码3、Rust将字符串上的迭...
(""); pos += BYTES_PER_SIZE; } } //逐行获取 fn show_string(path: &str) { let f = File::open(path).expect("打开文件失败"); let buf = io::BufReader::new(f); for line in buf.lines() { let line = line.unwrap(); println!("{}", line) } } 写入 use std::fs::Open...
reader: &'b R } impl<'a, 'b, S, R> Decoder<'a, 'b, S, R> where 'a: 'b { } fn main() { let a: Vec<u8> = vec![]; let b: Vec<u8> = vec![]; let decoder = Decoder {schema: &a, reader: &b}; } 我们使用where语句在impl代码块中指定了关系:'a:'b。这表示'a的...