mirror of https://github.com/rust-lang/rust
37 lines
530 B
Rust
37 lines
530 B
Rust
use std::mem::ManuallyDrop;
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#[derive(Clone)] //~ ERROR the trait bound `U1: Copy` is not satisfied
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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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union U4<T: Copy> {
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a: T, // OK
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}
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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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#[derive(Clone)]
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struct CloneNoCopy;
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fn main() {
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let u = U5 { a: ManuallyDrop::new(CloneNoCopy) };
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let w = u.clone(); //~ ERROR the method
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}
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