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dbaupp
on June 3, 2014
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Swift – observations from Rust’s original designer
Haskell has it for its type classes in the form of existentials[1] too:
forall a. SomeClass a => a
in Haskell is quite similar to
&SomeTrait
in Rust.
[1]
http://www.haskell.org/haskellwiki/Existential_type
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[1] http://www.haskell.org/haskellwiki/Existential_type