rust/tests/ui/unused_io_amount.rs
2019-07-23 03:59:09 +08:00

27 lines
557 B
Rust

#![allow(dead_code)]
#![warn(clippy::unused_io_amount)]
use std::io;
fn try_macro<T: io::Read + io::Write>(s: &mut T) -> io::Result<()> {
r#try!(s.write(b"test"));
let mut buf = [0u8; 4];
r#try!(s.read(&mut buf));
Ok(())
}
fn question_mark<T: io::Read + io::Write>(s: &mut T) -> io::Result<()> {
s.write(b"test")?;
let mut buf = [0u8; 4];
s.read(&mut buf)?;
Ok(())
}
fn unwrap<T: io::Read + io::Write>(s: &mut T) {
s.write(b"test").unwrap();
let mut buf = [0u8; 4];
s.read(&mut buf).unwrap();
}
fn main() {}