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16 lines
249 B
Rust
16 lines
249 B
Rust
enum Ty {
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Unit,
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List(Box<Ty>),
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}
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fn foo(x: Ty) -> Ty {
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match x {
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Ty::Unit => Ty::Unit,
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Ty::List(elem) => foo(elem),
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//~^ ERROR mismatched types
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//~| HELP consider unboxing the value
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}
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}
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fn main() {}
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