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author | Martin Odersky <odersky@gmail.com> | 2016-07-11 18:05:36 +0200 |
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committer | Martin Odersky <odersky@gmail.com> | 2016-07-12 18:14:04 +0200 |
commit | cdebd91712b36b048233d7cf9501cc7a5bb50b31 (patch) | |
tree | 35d3ee5d8800e958640916cd0145def1f5726751 /tests/pos/t2712-5.scala | |
parent | 1792c9e9bcff1feba7b50a24a46e1e20d8a39d9b (diff) | |
download | dotty-cdebd91712b36b048233d7cf9501cc7a5bb50b31.tar.gz dotty-cdebd91712b36b048233d7cf9501cc7a5bb50b31.tar.bz2 dotty-cdebd91712b36b048233d7cf9501cc7a5bb50b31.zip |
Allow definition of new types in refinements
Allow definition of types in refinements that do not appear
in parent type.
Diffstat (limited to 'tests/pos/t2712-5.scala')
-rw-r--r-- | tests/pos/t2712-5.scala | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/tests/pos/t2712-5.scala b/tests/pos/t2712-5.scala new file mode 100644 index 000000000..ed96d4c06 --- /dev/null +++ b/tests/pos/t2712-5.scala @@ -0,0 +1,29 @@ +package test + +import scala.language.higherKinds + +trait Functor[F[_]] { + def map[A, B](f: A => B, fa: F[A]): F[B] +} + +object Functor { + implicit def function[A]: Functor[({ type l[B] = A => B })#l] = + new Functor[({ type l[B] = A => B })#l] { + def map[C, B](cb: C => B, ac: A => C): A => B = cb compose ac + } +} + +object FunctorSyntax { + implicit class FunctorOps[F[_], A](fa: F[A])(implicit F: Functor[F]) { + def map[B](f: A => B): F[B] = F.map(f, fa) + } +} + +object Test { + + val f: Int => String = _.toString + + import FunctorSyntax._ + + f.map((s: String) => s.reverse) +} |