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A comment on Abstraction without overhead: traits in Rust. Parent comment

Re:Abstraction without overhead: traits in Rust by Rusky on Tuesday May 12, 2015 @09:07AM (#9531409)
I get this when I try something like `as Box<Read+Write>`

    error: only the builtin traits can be used as closure or object bounds [E0225]
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Re:Abstraction without overhead: traits in Rust by Manishearth on Tuesday May 12, 2015 @09:32AM (#9531582)
TIL; thanks :)
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