25 lines
344 B
Rust
25 lines
344 B
Rust
trait MyEq {
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#[derivable]
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pure fn eq(&self, other: &self) -> bool;
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}
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struct A {
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x: int
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}
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enum B {
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C(A),
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D(A),
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E(A)
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}
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impl B : MyEq;
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//~^ ERROR cannot automatically derive
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//~^^ ERROR cannot automatically derive
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//~^^^ ERROR cannot automatically derive
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fn main() {
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let c = C(A { x: 15 });
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assert c.eq(&c);
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}
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