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A comment on Announcing Rust 1.18. Parent comment

Re:Announcing Rust 1.18 by steveklabnik on Thursday June 08, 2017 @04:10PM (#14516840)
Yes, it is. Generics are universals and impl Trait is extisentials. For more, the RFC gets into it https://github.com/rust-lang/rfcs/blob/master/text/1951-expa...
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