2021-05-13 09:42:25 -05:00
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// revisions: mirunsafeck thirunsafeck
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// [thirunsafeck]compile-flags: -Z thir-unsafeck
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2018-12-19 13:58:20 -06:00
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use std::mem::ManuallyDrop;
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2020-09-02 02:40:56 -05:00
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#[derive(Clone)] //~ ERROR the trait bound `U1: Copy` is not satisfied
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2016-08-26 11:23:42 -05:00
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union U1 {
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a: u8,
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}
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#[derive(Clone)]
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union U2 {
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a: u8, // OK
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}
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impl Copy for U2 {}
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#[derive(Clone, Copy)]
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union U3 {
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a: u8, // OK
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}
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#[derive(Clone, Copy)]
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2018-12-19 13:58:20 -06:00
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union U4<T: Copy> {
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2016-08-26 11:23:42 -05:00
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a: T, // OK
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}
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2018-12-19 13:58:20 -06:00
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#[derive(Clone, Copy)]
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union U5<T> {
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a: ManuallyDrop<T>, // OK
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}
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2016-08-26 11:23:42 -05:00
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#[derive(Clone)]
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struct CloneNoCopy;
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fn main() {
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2018-12-19 13:58:20 -06:00
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let u = U5 { a: ManuallyDrop::new(CloneNoCopy) };
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2020-09-26 16:20:14 -05:00
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let w = u.clone(); //~ ERROR the method
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2016-08-26 11:23:42 -05:00
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}
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