75 lines
1.1 KiB
Rust
75 lines
1.1 KiB
Rust
#![feature(untagged_unions)]
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#![allow(dead_code)]
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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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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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fn clone(&self) -> Self {
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unimplemented!()
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}
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}
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// Ok, `Clone` cannot be derived because of the big array
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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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fn clone(&self) -> Self {
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unimplemented!()
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}
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}
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// Ok, function pointers are not always Clone
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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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fn clone(&self) -> Self {
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unimplemented!()
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}
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}
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// Ok, 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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fn main() {}
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