rust/tests/ui/consts/const-eval/enum_discr.rs

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// run-pass
enum Foo {
X = 42,
Y = Foo::X as isize - 3,
}
enum Bar {
X,
Y = Bar::X as isize + 2,
}
enum Boo {
X = Boo::Y as isize * 2,
Y = 9,
}
fn main() {
assert_eq!(Foo::X as isize, 42);
assert_eq!(Foo::Y as isize, 39);
assert_eq!(Bar::X as isize, 0);
assert_eq!(Bar::Y as isize, 2);
assert_eq!(Boo::X as isize, 18);
assert_eq!(Boo::Y as isize, 9);
}