Read
์ Write
Read
์ BufRead
๋ฅผ ์ฌ์ฉํ๋ฉด u8
ํ์
์ ๋ฐ์ดํฐ ์คํธ๋ฆผ์ ์ฝ์ ์ ์์ต๋๋ค:
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!("์ฌ๋ผ์ด์ค ๋ด ์ค: {}", count_lines(slice)); let file = std::fs::File::open(std::env::current_exe()?)?; println!("ํ์ผ ๋ด ์ค: {}", count_lines(file)); Ok(()) }
์ด์ ๋น์ทํ๊ฒ, Write
๋ฅผ ์ฌ์นํ๋ฉด u8
ํ์
์ ๋ฐ์ดํฐ๋ฅผ ์ธ ์ ์์ต๋๋ค:
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, "์๋ ํ์ธ์")?; log(&mut buffer, "World")?; println!("๋ก๊ทธ ๋ด์ญ: {:?}", buffer); Ok(()) }