mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-24 05:33:27 +00:00
58 lines
1.9 KiB
Rust
58 lines
1.9 KiB
Rust
// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
|
|
#![feature(tool_lints)]
|
|
|
|
#![warn(clippy::explicit_write)]
|
|
|
|
|
|
fn stdout() -> String {
|
|
String::new()
|
|
}
|
|
|
|
fn stderr() -> String {
|
|
String::new()
|
|
}
|
|
|
|
fn main() {
|
|
// these should warn
|
|
{
|
|
use std::io::Write;
|
|
write!(std::io::stdout(), "test").unwrap();
|
|
write!(std::io::stderr(), "test").unwrap();
|
|
writeln!(std::io::stdout(), "test").unwrap();
|
|
writeln!(std::io::stderr(), "test").unwrap();
|
|
std::io::stdout().write_fmt(format_args!("test")).unwrap();
|
|
std::io::stderr().write_fmt(format_args!("test")).unwrap();
|
|
}
|
|
// these should not warn, different destination
|
|
{
|
|
use std::fmt::Write;
|
|
let mut s = String::new();
|
|
write!(s, "test").unwrap();
|
|
write!(s, "test").unwrap();
|
|
writeln!(s, "test").unwrap();
|
|
writeln!(s, "test").unwrap();
|
|
s.write_fmt(format_args!("test")).unwrap();
|
|
s.write_fmt(format_args!("test")).unwrap();
|
|
write!(stdout(), "test").unwrap();
|
|
write!(stderr(), "test").unwrap();
|
|
writeln!(stdout(), "test").unwrap();
|
|
writeln!(stderr(), "test").unwrap();
|
|
stdout().write_fmt(format_args!("test")).unwrap();
|
|
stderr().write_fmt(format_args!("test")).unwrap();
|
|
}
|
|
// these should not warn, no unwrap
|
|
{
|
|
use std::io::Write;
|
|
std::io::stdout().write_fmt(format_args!("test")).expect("no stdout");
|
|
std::io::stderr().write_fmt(format_args!("test")).expect("no stderr");
|
|
}
|
|
}
|