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enum T { A, B }
fn main() {
let x = T::A;
match x { T::B => { } } //~ ERROR non-exhaustive patterns: `T::A` not covered
match true { //~ ERROR non-exhaustive patterns: `false` not covered
true => {}
}
match Some(10) { //~ ERROR non-exhaustive patterns: `Some(_)` not covered
None => {}
}
match (2, 3, 4) { //~ ERROR non-exhaustive patterns: `(_, _, i32::MIN..=3_i32)`
// and `(_, _, 5_i32..=i32::MAX)` not covered
(_, _, 4) => {}
}
match (T::A, T::A) { //~ ERROR non-exhaustive patterns: `(T::A, T::A)` and `(T::B, T::B)` not covered
(T::A, T::B) => {}
(T::B, T::A) => {}
}
match T::A { //~ ERROR non-exhaustive patterns: `T::B` not covered
T::A => {}
}
// This is exhaustive, though the algorithm got it wrong at one point
match (T::A, T::B) {
(T::A, _) => {}
(_, T::A) => {}
(T::B, T::B) => {}
}
let vec = vec![Some(42), None, Some(21)];
let vec: &[Option<isize>] = &vec;
match *vec { //~ ERROR non-exhaustive patterns: `[]` not covered
[Some(..), None, ref tail @ ..] => {}
[Some(..), Some(..), ref tail @ ..] => {}
[None] => {}
}
let vec = vec![1];
let vec: &[isize] = &vec;
match *vec {
[_, ref tail @ ..] => (),
[] => ()
}
let vec = vec![0.5f32];
let vec: &[f32] = &vec;
match *vec { //~ ERROR non-exhaustive patterns: `[_, _, _, _, ..]` not covered
[0.1, 0.2, 0.3] => (),
[0.1, 0.2] => (),
[0.1] => (),
[] => ()
}
let vec = vec![Some(42), None, Some(21)];
let vec: &[Option<isize>] = &vec;
match *vec {
[Some(..), None, ref tail @ ..] => {}
[Some(..), Some(..), ref tail @ ..] => {}
[None, None, ref tail @ ..] => {}
[None, Some(..), ref tail @ ..] => {}
[Some(_)] => {}
[None] => {}
[] => {}
}
}
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