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// run-pass
fn main() { let _ = g(Some(E::F(K))); }
type R = Result<(), ()>;
struct K;
enum E {
F(K), // must not be built-in type
#[allow(dead_code)]
G(Box<E>, Box<E>),
}
fn translate(x: R) -> R { x }
fn g(mut status: Option<E>) -> R {
loop {
match status {
Some(infix_or_postfix) => match infix_or_postfix {
E::F(_op) => { // <- must be captured by value
match Ok(()) {
Err(err) => return Err(err),
Ok(_) => {},
};
}
_ => (),
},
_ => match translate(Err(())) {
Err(err) => return Err(err),
Ok(_) => {},
}
}
status = None;
}
}
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