41 lines
577 B
Rust
41 lines
577 B
Rust
// run-pass
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#![allow(dead_code)]
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#![allow(unused_variables)]
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// Some traits can be derived for unions.
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#[derive(
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Copy,
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Clone,
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Eq,
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)]
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union U {
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a: u8,
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b: u16,
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}
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impl PartialEq for U { fn eq(&self, rhs: &Self) -> bool { true } }
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#[derive(
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Clone,
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Copy,
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Eq
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)]
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union W<T: Copy> {
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a: T,
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}
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impl<T: Copy> PartialEq for W<T> { fn eq(&self, rhs: &Self) -> bool { true } }
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fn main() {
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let u = U { b: 0 };
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let u1 = u;
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let u2 = u.clone();
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assert!(u1 == u2);
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let w = W { a: 0 };
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let w1 = w.clone();
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assert!(w == w1);
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}
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