Pattern arm did not match expected kind.
Erroneous code example:
enum State {
Succeeded,
Failed(String),
}
fn print_on_failure(state: &State) {
match *state {
// error: expected unit struct, unit variant or constant, found tuple
// variant `State::Failed`
State::Failed => println!("Failed"),
_ => ()
}
}
RunTo fix this error, ensure the match arm kind is the same as the expression matched.
Fixed example:
enum State {
Succeeded,
Failed(String),
}
fn print_on_failure(state: &State) {
match *state {
State::Failed(ref msg) => println!("Failed with {}", msg),
_ => ()
}
}
Run