Created
August 2, 2011 18:11
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Existential _ vs Higher-kind _
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| scala> def f[A[_] <: Seq[_]](f: A[Int]) = f.head | |
| f: [A[_] <: Seq[_]](f: A[Int])A | |
| scala> def f[A[_] <: Seq[t] forSome { type t }](f: A[Int]) = f.head | |
| f: [A[_] <: Seq[_]](f: A[Int])A | |
| scala> def f[A[t] <: Seq[_] forSome { type t}](f: A[Int]) = f.head | |
| f: [A[t] <: Seq[_] forSome { type t }](f: A[Int])A |
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