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