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// Test bindings-after-at with or-patterns and slice-patterns
// run-pass
#[derive(Debug, PartialEq)]
enum MatchArm {
Arm(usize),
Wild,
}
#[derive(Debug, PartialEq)]
enum Test {
Foo,
Bar,
Baz,
Qux,
}
fn test(foo: &[Option<Test>]) -> MatchArm {
match foo {
bar @ [Some(Test::Foo), .., Some(Test::Qux | Test::Foo)] => {
assert_eq!(bar, foo);
MatchArm::Arm(0)
},
[.., bar @ Some(Test::Bar | Test::Qux), _] => {
assert!(bar == &Some(Test::Bar) || bar == &Some(Test::Qux));
MatchArm::Arm(1)
},
_ => MatchArm::Wild,
}
}
fn main() {
let foo = vec![
Some(Test::Foo),
Some(Test::Bar),
Some(Test::Baz),
Some(Test::Qux),
];
// path 1a
assert_eq!(test(&foo), MatchArm::Arm(0));
// path 1b
assert_eq!(test(&[Some(Test::Foo), Some(Test::Bar), Some(Test::Foo)]), MatchArm::Arm(0));
// path 2a
assert_eq!(test(&foo[..3]), MatchArm::Arm(1));
// path 2b
assert_eq!(test(&[Some(Test::Bar), Some(Test::Qux), Some(Test::Baz)]), MatchArm::Arm(1));
// path 3
assert_eq!(test(&foo[1..2]), MatchArm::Wild);
}
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