1 #![feature(tool_lints)]
3 #![allow(unused_must_use)]
4 #![warn(clippy::write_literal)]
9 let mut v = Vec::new();
11 // these should be fine
12 write!(&mut v, "Hello");
13 writeln!(&mut v, "Hello");
15 writeln!(&mut v, "Hello {}", world);
16 writeln!(&mut v, "Hello {world}", world=world);
17 writeln!(&mut v, "3 in hex is {:X}", 3);
18 writeln!(&mut v, "2 + 1 = {:.4}", 3);
19 writeln!(&mut v, "2 + 1 = {:5.4}", 3);
20 writeln!(&mut v, "Debug test {:?}", "hello, world");
21 writeln!(&mut v, "{0:8} {1:>8}", "hello", "world");
22 writeln!(&mut v, "{1:8} {0:>8}", "hello", "world");
23 writeln!(&mut v, "{foo:8} {bar:>8}", foo="hello", bar="world");
24 writeln!(&mut v, "{bar:8} {foo:>8}", foo="hello", bar="world");
25 writeln!(&mut v, "{number:>width$}", number=1, width=6);
26 writeln!(&mut v, "{number:>0width$}", number=1, width=6);
28 // these should throw warnings
29 writeln!(&mut v, "{} of {:b} people know binary, the other half doesn't", 1, 2);
30 write!(&mut v, "Hello {}", "world");
31 writeln!(&mut v, "Hello {} {}", world, "world");
32 writeln!(&mut v, "Hello {}", "world");
33 writeln!(&mut v, "10 / 4 is {}", 2.5);
34 writeln!(&mut v, "2 + 1 = {}", 3);
36 // positional args don't change the fact
37 // that we're using a literal -- this should
39 writeln!(&mut v, "{0} {1}", "hello", "world");
40 writeln!(&mut v, "{1} {0}", "hello", "world");
42 // named args shouldn't change anything either
43 writeln!(&mut v, "{foo} {bar}", foo="hello", bar="world");
44 writeln!(&mut v, "{bar} {foo}", foo="hello", bar="world");