| #![warn(clippy::print_literal)] |
| #![allow(clippy::uninlined_format_args)] |
| |
| fn main() { |
| // these should be fine |
| print!("Hello"); |
| println!("Hello"); |
| let world = "world"; |
| println!("Hello {}", world); |
| println!("Hello {world}", world = world); |
| println!("3 in hex is {:X}", 3); |
| println!("2 + 1 = {:.4}", 3); |
| println!("2 + 1 = {:5.4}", 3); |
| println!("Debug test {:?}", "hello, world"); |
| println!("{0:8} {1:>8}", "hello", "world"); |
| println!("{1:8} {0:>8}", "hello", "world"); |
| println!("{foo:8} {bar:>8}", foo = "hello", bar = "world"); |
| println!("{bar:8} {foo:>8}", foo = "hello", bar = "world"); |
| println!("{number:>width$}", number = 1, width = 6); |
| println!("{number:>0width$}", number = 1, width = 6); |
| println!("{} of {:b} people know binary, the other half doesn't", 1, 2); |
| println!("10 / 4 is {}", 2.5); |
| println!("2 + 1 = {}", 3); |
| println!("From expansion {}", stringify!(not a string literal)); |
| |
| // these should throw warnings |
| print!("Hello world"); |
| //~^ ERROR: literal with an empty format string |
| //~| NOTE: `-D clippy::print-literal` implied by `-D warnings` |
| println!("Hello {} world", world); |
| //~^ ERROR: literal with an empty format string |
| println!("Hello world"); |
| //~^ ERROR: literal with an empty format string |
| println!("a literal {:.4}", 5); |
| //~^ ERROR: literal with an empty format string |
| |
| // positional args don't change the fact |
| // that we're using a literal -- this should |
| // throw a warning |
| println!("hello world"); |
| //~^ ERROR: literal with an empty format string |
| println!("world hello"); |
| //~^ ERROR: literal with an empty format string |
| |
| // named args shouldn't change anything either |
| println!("hello world"); |
| //~^ ERROR: literal with an empty format string |
| println!("world hello"); |
| //~^ ERROR: literal with an empty format string |
| |
| // The string literal from `file!()` has a callsite span that isn't marked as coming from an |
| // expansion |
| println!("file: {}", file!()); |
| |
| // Braces in unicode escapes should not be escaped |
| println!("{{}} \x00 \u{ab123} \\\u{ab123} {{:?}}"); |
| println!("\\\u{1234}"); |
| // This does not lint because it would have to suggest unescaping the character |
| println!(r"{}", "\u{ab123}"); |
| // These are not unicode escapes |
| println!("\\u{{ab123}} \\u{{{{"); |
| println!(r"\u{{ab123}} \u{{{{"); |
| println!("\\{{ab123}} \\u{{{{"); |
| println!("\\u{{ab123}}"); |
| println!("\\\\u{{1234}}"); |
| |
| println!("mixed: {{hello}} {world}"); |
| } |