mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-28 01:34:21 +00:00
20 lines
740 B
Rust
20 lines
740 B
Rust
enum T { A(U), B }
|
|
enum U { C, D }
|
|
|
|
fn match_nested_vecs<'a, T>(l1: Option<&'a [T]>, l2: Result<&'a [T], ()>) -> &'static str {
|
|
match (l1, l2) { //~ ERROR non-exhaustive patterns: `(Some(&[]), Err(_))` not covered
|
|
(Some(&[]), Ok(&[])) => "Some(empty), Ok(empty)",
|
|
(Some(&[_, ..]), Ok(_)) | (Some(&[_, ..]), Err(())) => "Some(non-empty), any",
|
|
(None, Ok(&[])) | (None, Err(())) | (None, Ok(&[_])) => "None, Ok(less than one element)",
|
|
(None, Ok(&[_, _, ..])) => "None, Ok(at least two elements)"
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
let x = T::A(U::C);
|
|
match x { //~ ERROR non-exhaustive patterns: `T::A(U::C)` not covered
|
|
T::A(U::D) => { panic!("hello"); }
|
|
T::B => { panic!("goodbye"); }
|
|
}
|
|
}
|