mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-14 17:07:17 +00:00
55 lines
2 KiB
Rust
55 lines
2 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.
|
|
|
|
|
|
|
|
|
|
#![allow(unused_must_use)]
|
|
#![warn(clippy::write_literal)]
|
|
|
|
use std::io::Write;
|
|
|
|
fn main() {
|
|
let mut v = Vec::new();
|
|
|
|
// these should be fine
|
|
write!(&mut v, "Hello");
|
|
writeln!(&mut v, "Hello");
|
|
let world = "world";
|
|
writeln!(&mut v, "Hello {}", world);
|
|
writeln!(&mut v, "Hello {world}", world=world);
|
|
writeln!(&mut v, "3 in hex is {:X}", 3);
|
|
writeln!(&mut v, "2 + 1 = {:.4}", 3);
|
|
writeln!(&mut v, "2 + 1 = {:5.4}", 3);
|
|
writeln!(&mut v, "Debug test {:?}", "hello, world");
|
|
writeln!(&mut v, "{0:8} {1:>8}", "hello", "world");
|
|
writeln!(&mut v, "{1:8} {0:>8}", "hello", "world");
|
|
writeln!(&mut v, "{foo:8} {bar:>8}", foo="hello", bar="world");
|
|
writeln!(&mut v, "{bar:8} {foo:>8}", foo="hello", bar="world");
|
|
writeln!(&mut v, "{number:>width$}", number=1, width=6);
|
|
writeln!(&mut v, "{number:>0width$}", number=1, width=6);
|
|
|
|
// these should throw warnings
|
|
writeln!(&mut v, "{} of {:b} people know binary, the other half doesn't", 1, 2);
|
|
write!(&mut v, "Hello {}", "world");
|
|
writeln!(&mut v, "Hello {} {}", world, "world");
|
|
writeln!(&mut v, "Hello {}", "world");
|
|
writeln!(&mut v, "10 / 4 is {}", 2.5);
|
|
writeln!(&mut v, "2 + 1 = {}", 3);
|
|
|
|
// positional args don't change the fact
|
|
// that we're using a literal -- this should
|
|
// throw a warning
|
|
writeln!(&mut v, "{0} {1}", "hello", "world");
|
|
writeln!(&mut v, "{1} {0}", "hello", "world");
|
|
|
|
// named args shouldn't change anything either
|
|
writeln!(&mut v, "{foo} {bar}", foo="hello", bar="world");
|
|
writeln!(&mut v, "{bar} {foo}", foo="hello", bar="world");
|
|
}
|