Is it possible to disable a lint for all macro invocations?

[pitdicker]

Description

Is there a way to suppress a lint (zero_prefixed_literal in my case) for all invocations of a macro?

For chrono (chronotope/chrono#1270) I am trying to write macros that can be used as

time!(7:03:25);

But that generates warnings (https://github.com/chronotope/chrono/actions/runs/6119764599/job/16610345590?pr=1270)

I am looking for a solution that doesn't require users to disable the lint. Maybe it can be solved by adjusting the macro, I just don't know enough about this part of Rust yet.

Version

No response

Additional Labels

No response

[Centri3]

You can have it expand to

#[allow(clippy::zero_prefixed_literal)]
{
    (actual code)
}

However, it's worth noting that this lint already checks if it's in an external macro (i.e., macro outside the current crate) and doesn't lint if so. So this will only come up for chrono in particular.

[Alexendoo]

The literals aren't coming from an expansion so it'd still be linted in other crates

[pitdicker]

Thank you for the help, but as you say the literals are in the other crate.
Are there tricks to make clippy ignore the macro arguments?

[Alexendoo]

I don't think so, but there is a trick to get rid of an indentation level for the allow attribute. Since the tail expression of a block can have attributes you can do

    ($y:literal-$m:literal-$d:literal) => {{
        #[allow(clippy::zero_prefixed_literal)]
        match $crate::NaiveDate::from_ymd_opt($y, $m, $d) {
            Some(d) => d,
            None => panic!("invalid calendar date"),
        }
    }};

[pitdicker]

This is perfect, thank you very much!