File: union-derive-eq.rs

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rustc 1.85.0%2Bdfsg3-1
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#[derive(Eq)] // OK
union U1 {
    a: u8,
}

impl PartialEq for U1 { fn eq(&self, rhs: &Self) -> bool { true } }

#[derive(PartialEq, Copy, Clone)]
struct PartialEqNotEq;

#[derive(Eq)]
union U2 {
    a: PartialEqNotEq, //~ ERROR the trait bound `PartialEqNotEq: Eq` is not satisfied
}

impl PartialEq for U2 { fn eq(&self, rhs: &Self) -> bool { true } }

fn main() {}