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#![warn(clippy::unused_format_specs)]
#![allow(unused)]
macro_rules! format_args_from_macro {
() => {
format_args!("from macro")
};
}
fn main() {
// prints `.`, not ` .`
println!("{}.", format_args!(""));
//~^ unused_format_specs
//prints `abcde`, not `abc`
println!("{}", format_args!("abcde"));
//~^ unused_format_specs
println!("{}.", format_args_from_macro!());
//~^ unused_format_specs
let args = format_args!("");
println!("{args}");
//~^ unused_format_specs
}
fn should_not_lint() {
println!("{}", format_args!(""));
// Technically the same as `{}`, but the `format_args` docs specifically mention that you can use
// debug formatting so allow it
println!("{:?}", format_args!(""));
let args = format_args!("");
println!("{args}");
}
#[clippy::format_args]
macro_rules! usr_println {
($target:expr, $($args:tt)*) => {{
if $target {
println!($($args)*)
}
}};
}
fn should_lint_user() {
// prints `.`, not ` .`
usr_println!(true, "{}.", format_args!(""));
//~^ unused_format_specs
//prints `abcde`, not `abc`
usr_println!(true, "{}", format_args!("abcde"));
//~^ unused_format_specs
usr_println!(true, "{}.", format_args_from_macro!());
//~^ unused_format_specs
let args = format_args!("");
usr_println!(true, "{args}");
//~^ unused_format_specs
}
fn should_not_lint_user() {
usr_println!(true, "{}", format_args!(""));
// Technically the same as `{}`, but the `format_args` docs specifically mention that you can use
// debug formatting so allow it
usr_println!(true, "{:?}", format_args!(""));
let args = format_args!("");
usr_println!(true, "{args}");
}
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