36 lines
1.1 KiB
Rust
36 lines
1.1 KiB
Rust
#![warn(clippy::unused_format_specs)]
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#![allow(unused)]
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//@no-rustfix
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macro_rules! format_args_from_macro {
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() => {
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format_args!("from macro")
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};
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}
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fn main() {
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// prints `.`, not ` .`
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println!("{:5}.", format_args!(""));
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//~^ ERROR: format specifiers have no effect on `format_args!()`
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//~| NOTE: `-D clippy::unused-format-specs` implied by `-D warnings`
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//prints `abcde`, not `abc`
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println!("{:.3}", format_args!("abcde"));
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//~^ ERROR: format specifiers have no effect on `format_args!()`
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println!("{:5}.", format_args_from_macro!());
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//~^ ERROR: format specifiers have no effect on `format_args!()`
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let args = format_args!("");
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println!("{args:5}");
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//~^ ERROR: format specifiers have no effect on `format_args!()`
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}
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fn should_not_lint() {
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println!("{}", format_args!(""));
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// Technically the same as `{}`, but the `format_args` docs specifically mention that you can use
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// debug formatting so allow it
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println!("{:?}", format_args!(""));
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let args = format_args!("");
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println!("{args}");
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}
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