mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-18 10:48:36 +00:00
51 lines
1.6 KiB
Rust
51 lines
1.6 KiB
Rust
// run-rustfix
|
|
#![allow(unused_imports)]
|
|
#![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();
|
|
|
|
// including newlines
|
|
writeln!(std::io::stdout(), "test\ntest").unwrap();
|
|
writeln!(std::io::stderr(), "test\ntest").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");
|
|
}
|
|
}
|