111 lines
2.0 KiB
Rust
111 lines
2.0 KiB
Rust
#![allow(
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clippy::non_canonical_clone_impl,
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clippy::non_canonical_partial_ord_impl,
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clippy::needless_lifetimes,
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dead_code
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)]
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#![warn(clippy::expl_impl_clone_on_copy)]
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#[derive(Copy)]
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struct Qux;
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impl Clone for Qux {
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//~^ ERROR: you are implementing `Clone` explicitly on a `Copy` type
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fn clone(&self) -> Self {
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Qux
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}
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}
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// looks like unions don't support deriving Clone for now
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#[derive(Copy)]
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union Union {
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a: u8,
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}
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impl Clone for Union {
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fn clone(&self) -> Self {
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Union { a: 42 }
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}
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}
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// See #666
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#[derive(Copy)]
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struct Lt<'a> {
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a: &'a u8,
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}
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impl<'a> Clone for Lt<'a> {
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//~^ ERROR: you are implementing `Clone` explicitly on a `Copy` type
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fn clone(&self) -> Self {
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unimplemented!()
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}
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}
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#[derive(Copy)]
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struct BigArray {
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a: [u8; 65],
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}
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impl Clone for BigArray {
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//~^ ERROR: you are implementing `Clone` explicitly on a `Copy` type
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fn clone(&self) -> Self {
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unimplemented!()
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}
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}
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#[derive(Copy)]
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struct FnPtr {
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a: fn() -> !,
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}
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impl Clone for FnPtr {
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//~^ ERROR: you are implementing `Clone` explicitly on a `Copy` type
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fn clone(&self) -> Self {
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unimplemented!()
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}
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}
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// Ok, Clone trait impl doesn't have constrained generics.
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#[derive(Copy)]
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struct Generic<T> {
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a: T,
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}
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impl<T> Clone for Generic<T> {
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fn clone(&self) -> Self {
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unimplemented!()
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}
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}
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#[derive(Copy)]
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struct Generic2<T>(T);
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impl<T: Clone> Clone for Generic2<T> {
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//~^ ERROR: you are implementing `Clone` explicitly on a `Copy` type
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fn clone(&self) -> Self {
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Self(self.0.clone())
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}
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}
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// Ok, Clone trait impl doesn't have constrained generics.
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#[derive(Copy)]
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struct GenericRef<'a, T, U>(T, &'a U);
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impl<T: Clone, U> Clone for GenericRef<'_, T, U> {
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fn clone(&self) -> Self {
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Self(self.0.clone(), self.1)
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}
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}
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// https://github.com/rust-lang/rust-clippy/issues/10188
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#[repr(packed)]
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#[derive(Copy)]
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struct Packed<T>(T);
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impl<T: Copy> Clone for Packed<T> {
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fn clone(&self) -> Self {
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*self
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}
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}
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fn main() {}
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