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