35 lines
984 B
Rust
35 lines
984 B
Rust
// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![allow(dead_code)]
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#![warn(clippy::unused_io_amount)]
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use std::io;
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fn try_macro<T: io::Read + io::Write>(s: &mut T) -> io::Result<()> {
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try!(s.write(b"test"));
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let mut buf = [0u8; 4];
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try!(s.read(&mut buf));
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Ok(())
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}
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fn question_mark<T: io::Read + io::Write>(s: &mut T) -> io::Result<()> {
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s.write(b"test")?;
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let mut buf = [0u8; 4];
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s.read(&mut buf)?;
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Ok(())
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}
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fn unwrap<T: io::Read + io::Write>(s: &mut T) {
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s.write(b"test").unwrap();
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let mut buf = [0u8; 4];
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s.read(&mut buf).unwrap();
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}
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fn main() {}
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