rust/tests/ui/unused_unit.fixed

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2019-03-07 07:21:41 +01:00
// run-rustfix
// The output for humans should just highlight the whole span without showing
// the suggested replacement, but we also want to test that suggested
// replacement only removes one set of parentheses, rather than naïvely
// stripping away any starting or ending parenthesis characters—hence this
// test of the JSON error format.
#![feature(custom_inner_attributes)]
#![rustfmt::skip]
#![deny(clippy::unused_unit)]
struct Unitter;
impl Unitter {
// try to disorient the lint with multiple unit returns and newlines
#[allow(clippy::no_effect)]
pub fn get_unit<F: Fn() -> (), G>(&self, f: F, _g: G)
where G: Fn() -> () {
let _y: &Fn() -> () = &f;
(); // this should not lint, as it's not in return type position
}
}
impl Into<()> for Unitter {
#[rustfmt::skip]
fn into(self) {
}
}
fn return_unit() { }
#[allow(clippy::needless_return)]
#[allow(clippy::never_loop)]
fn main() {
let u = Unitter;
assert_eq!(u.get_unit(|| {}, return_unit), u.into());
return_unit();
loop {
break;
}
return;
}