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Commit | Line | Data |
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f20569fa XL |
1 | #![allow(unused_must_use)] |
2 | #![warn(clippy::write_literal)] | |
3 | ||
4 | use std::io::Write; | |
5 | ||
6 | fn main() { | |
7 | let mut v = Vec::new(); | |
8 | ||
9 | // these should be fine | |
10 | write!(&mut v, "Hello"); | |
11 | writeln!(&mut v, "Hello"); | |
12 | let world = "world"; | |
13 | writeln!(&mut v, "Hello {}", world); | |
14 | writeln!(&mut v, "Hello {world}", world = world); | |
15 | writeln!(&mut v, "3 in hex is {:X}", 3); | |
16 | writeln!(&mut v, "2 + 1 = {:.4}", 3); | |
17 | writeln!(&mut v, "2 + 1 = {:5.4}", 3); | |
18 | writeln!(&mut v, "Debug test {:?}", "hello, world"); | |
19 | writeln!(&mut v, "{0:8} {1:>8}", "hello", "world"); | |
20 | writeln!(&mut v, "{1:8} {0:>8}", "hello", "world"); | |
21 | writeln!(&mut v, "{foo:8} {bar:>8}", foo = "hello", bar = "world"); | |
22 | writeln!(&mut v, "{bar:8} {foo:>8}", foo = "hello", bar = "world"); | |
23 | writeln!(&mut v, "{number:>width$}", number = 1, width = 6); | |
24 | writeln!(&mut v, "{number:>0width$}", number = 1, width = 6); | |
25 | writeln!(&mut v, "{} of {:b} people know binary, the other half doesn't", 1, 2); | |
26 | writeln!(&mut v, "10 / 4 is {}", 2.5); | |
27 | writeln!(&mut v, "2 + 1 = {}", 3); | |
28 | ||
29 | // these should throw warnings | |
30 | write!(&mut v, "Hello {}", "world"); | |
31 | writeln!(&mut v, "Hello {} {}", world, "world"); | |
32 | writeln!(&mut v, "Hello {}", "world"); | |
33 | ||
34 | // positional args don't change the fact | |
35 | // that we're using a literal -- this should | |
36 | // throw a warning | |
37 | writeln!(&mut v, "{0} {1}", "hello", "world"); | |
38 | writeln!(&mut v, "{1} {0}", "hello", "world"); | |
39 | ||
40 | // named args shouldn't change anything either | |
41 | writeln!(&mut v, "{foo} {bar}", foo = "hello", bar = "world"); | |
42 | writeln!(&mut v, "{bar} {foo}", foo = "hello", bar = "world"); | |
43 | } |