| #![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!("{} {:.4}", "a literal", 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!("{0} {1}", "hello", "world"); |
| //~^ ERROR: literal with an empty format string |
| //~| ERROR: literal with an empty format string |
| println!("{1} {0}", "hello", "world"); |
| //~^ ERROR: literal with an empty format string |
| //~| ERROR: literal with an empty format string |
| |
| // named args shouldn't change anything either |
| println!("{foo} {bar}", foo = "hello", bar = "world"); |
| //~^ ERROR: literal with an empty format string |
| //~| ERROR: literal with an empty format string |
| println!("{bar} {foo}", foo = "hello", bar = "world"); |
| //~^ ERROR: literal with an empty format string |
| //~| 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!()); |
| } |