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