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test discriminant of enum with uninhabited variant

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Bastian Kauschke 2020-03-08 17:04:02 +01:00
parent 22f2385a73
commit 6bbb9b86c4
1 changed files with 11 additions and 0 deletions
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11
src/test/ui/consts/const_discriminant.rs
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@ -15,10 +15,21 @@ const TEST_A: Discriminant<Test> = discriminant(&Test::A(5));
const TEST_A_OTHER: Discriminant<Test> = discriminant(&Test::A(17));
const TEST_B: Discriminant<Test> = discriminant(&Test::B);
enum Void {}
enum SingleVariant {
V,
Never(Void),
}
const TEST_V: Discriminant<SingleVariant> = discriminant(&SingleVariant::V);
fn main() {
assert_eq!(TEST_A, TEST_A_OTHER);
assert_eq!(TEST_A, discriminant(identity(&Test::A(17))));
assert_eq!(TEST_B, discriminant(identity(&Test::B)));
assert_ne!(TEST_A, TEST_B);
assert_ne!(TEST_B, discriminant(identity(&Test::C { a: 42, b: 7 })));
assert_eq!(TEST_V, discriminant(identity(&SingleVariant::V)));
}