rust/tests/ui/union/union-copy.rs

#[derive(Clone)]
union U {
    a: u8
}

#[derive(Clone)]
union W {
    a: std::mem::ManuallyDrop<String>
}

impl Copy for U {} // OK
impl Copy for W {} //~ ERROR the trait `Copy` cannot be implemented for this type

fn main() {}
Improve shallow `Clone` deriving 2016-08-26 16:23:42 +00:00			`#[derive(Clone)]`
Implement encoding/decoding unions in metadata Add well-formedness check Implement some more missing code 2016-08-15 13:10:58 +00:00			`union U {`
Address comments and add requested tests 2016-08-26 16:23:42 +00:00			`a: u8`
Implement encoding/decoding unions in metadata Add well-formedness check Implement some more missing code 2016-08-15 13:10:58 +00:00			`}`

Improve shallow `Clone` deriving 2016-08-26 16:23:42 +00:00			`#[derive(Clone)]`
Address comments and add requested tests 2016-08-26 16:23:42 +00:00			`union W {`
stabilize union with 'ManuallyDrop' fields and 'impl Drop for Union' 2020-10-04 20:24:14 +00:00			`a: std::mem::ManuallyDrop<String>`
Address comments and add requested tests 2016-08-26 16:23:42 +00:00			`}`

			`impl Copy for U {} // OK`
may not => cannot 2023-03-07 23:55:51 +00:00			impl Copy for W {} //~ ERROR the trait `Copy` cannot be implemented for this type
Address comments and add requested tests 2016-08-26 16:23:42 +00:00
Implement encoding/decoding unions in metadata Add well-formedness check Implement some more missing code 2016-08-15 13:10:58 +00:00			`fn main() {}`