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