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use std::mem::ManuallyDrop;
#[derive(Clone, Copy)]
struct Copy;
struct NonCopy;
union Unn {
n1: ManuallyDrop<NonCopy>,
n2: ManuallyDrop<NonCopy>,
}
union Ucc {
c1: Copy,
c2: Copy,
}
union Ucn {
c: Copy,
n: ManuallyDrop<NonCopy>,
}
fn main() {
unsafe {
// 2 NonCopy
{
let mut u = Unn { n1: ManuallyDrop::new(NonCopy) };
let a = u.n1;
let a = u.n1; //~ ERROR use of moved value: `u`
}
{
let mut u = Unn { n1: ManuallyDrop::new(NonCopy) };
let a = u.n1;
let a = u; //~ ERROR use of moved value: `u`
}
{
let mut u = Unn { n1: ManuallyDrop::new(NonCopy) };
let a = u.n1;
let a = u.n2; //~ ERROR use of moved value: `u`
}
// 2 Copy
{
let mut u = Ucc { c1: Copy };
let a = u.c1;
let a = u.c1; // OK
}
{
let mut u = Ucc { c1: Copy };
let a = u.c1;
let a = u; // OK
}
{
let mut u = Ucc { c1: Copy };
let a = u.c1;
let a = u.c2; // OK
}
// 1 Copy, 1 NonCopy
{
let mut u = Ucn { c: Copy };
let a = u.c;
let a = u.c; // OK
}
{
let mut u = Ucn { c: Copy };
let a = u.n;
let a = u.n; //~ ERROR use of moved value: `u`
}
{
let mut u = Ucn { c: Copy };
let a = u.n;
let a = u.c; //~ ERROR use of moved value: `u`
}
{
let mut u = Ucn { c: Copy };
let a = u.c;
let a = u.n; // OK
}
{
let mut u = Ucn { c: Copy };
let a = u.c;
let a = u; // OK
}
{
let mut u = Ucn { c: Copy };
let a = u.n;
let a = u; //~ ERROR use of moved value: `u`
}
}
}
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