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// build-pass (FIXME(62277): could be check-pass?)
#![warn(unused_parens)]
macro_rules! the_worship_the_heart_lifts_above {
( @as_expr, $e:expr) => { $e };
( @generate_fn, $name:tt) => {
#[allow(dead_code)] fn the_moth_for_the_star<'a>() -> Option<&'a str> {
Some(the_worship_the_heart_lifts_above!( @as_expr, $name ))
}
};
( $name:ident ) => { the_worship_the_heart_lifts_above!( @generate_fn, (stringify!($name))); }
// ↑ Notably, this does 𝘯𝘰𝘵 warn: we're declining to lint unused parens in
// function/method arguments inside of nested macros because of situations
// like those reported in Issue #47775
}
macro_rules! and_the_heavens_reject_not {
() => {
// ↓ But let's test that we still lint for unused parens around
// function args inside of simple, one-deep macros.
#[allow(dead_code)] fn the_night_for_the_morrow() -> Option<isize> { Some((2)) }
//~^ WARN unnecessary parentheses around function argument
}
}
the_worship_the_heart_lifts_above!(rah);
and_the_heavens_reject_not!();
fn main() {}
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