Read
and Write
با استفاده از Read
و BufRead
، میتوانید بر روی منابع u8
انتزاع کنید:
use std::io::{BufRead, BufReader, Read, Result}; fn count_lines<R: Read>(reader: R) -> usize { let buf_reader = BufReader::new(reader); buf_reader.lines().count() } fn main() -> Result<()> { let slice: &[u8] = b"foo\nbar\nbaz\n"; println!("lines in slice: {}", count_lines(slice)); let file = std::fs::File::open(std::env::current_exe()?)?; println!("lines in file: {}", count_lines(file)); Ok(()) }
به طور مشابه، Write
به شما امکان میدهد که بر روی منابع u8
انتزاع کنید:
use std::io::{Result, Write}; fn log<W: Write>(writer: &mut W, msg: &str) -> Result<()> { writer.write_all(msg.as_bytes())?; writer.write_all("\n".as_bytes()) } fn main() -> Result<()> { let mut buffer = Vec::new(); log(&mut buffer, "سلام")?; log(&mut buffer, "دنیا")?; println!("Logged: {:?}", buffer); Ok(()) }