mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-30 16:39:26 +00:00
68 lines
2.5 KiB
Rust
68 lines
2.5 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!("a literal {:.4}", 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!("hello world");
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//~^ ERROR: literal with an empty format string
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println!("world hello");
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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!("hello world");
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//~^ ERROR: literal with an empty format string
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println!("world hello");
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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!("\\u{{ab123}} \\u{{{{");
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println!(r"\u{{ab123}} \u{{{{");
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println!("\\{{ab123}} \\u{{{{");
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println!("\\u{{ab123}}");
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println!("\\\\u{{1234}}");
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println!("mixed: {{hello}} {world}");
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}
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