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#![allow(unused)]
#![warn(clippy::ref_option_ref)]
//@no-rustfix
// This lint is not tagged as run-rustfix because automatically
// changing the type of a variable would also means changing
// all usages of this variable to match and This is not handled
// by this lint.
static THRESHOLD: i32 = 10;
static REF_THRESHOLD: &Option<&i32> = &Some(&THRESHOLD);
//~^ ref_option_ref
const CONST_THRESHOLD: &i32 = &10;
const REF_CONST: &Option<&i32> = &Some(CONST_THRESHOLD);
//~^ ref_option_ref
type RefOptRefU32<'a> = &'a Option<&'a u32>;
//~^ ref_option_ref
type RefOptRef<'a, T> = &'a Option<&'a T>;
//~^ ref_option_ref
fn foo(data: &Option<&u32>) {}
//~^ ref_option_ref
fn bar(data: &u32) -> &Option<&u32> {
//~^ ref_option_ref
&None
}
struct StructRef<'a> {
data: &'a Option<&'a u32>,
//~^ ref_option_ref
}
struct StructTupleRef<'a>(u32, &'a Option<&'a u32>);
//~^ ref_option_ref
enum EnumRef<'a> {
Variant1(u32),
Variant2(&'a Option<&'a u32>),
//~^ ref_option_ref
}
trait RefOptTrait {
type A;
fn foo(&self, _: Self::A);
}
impl RefOptTrait for u32 {
type A = &'static Option<&'static Self>;
//~^ ref_option_ref
fn foo(&self, _: Self::A) {}
}
fn main() {
let x: &Option<&u32> = &None;
//~^ ref_option_ref
}
fn issue9682(arg: &Option<&mut String>) {
// Should not lint, as the inner ref is mutable making it non `Copy`
println!("{arg:?}");
}
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