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Mention SAM conversions

This commit is contained in:
Dale Wijnand 2019-01-29 15:47:50 +00:00
parent 53c6299c94
commit 32b342e9a8
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1 changed files with 4 additions and 2 deletions
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6
main-settings/src/main/scala/sbt/Append.scala
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@ -43,10 +43,10 @@ object Append {
@compileTimeOnly("This can be used in += only.")
implicit def appendTaskValueSeq[T, V <: T]: Value[Seq[Task[T]], Initialize[Task[V]]] =
(_, _) => ???
(_, _) => ??? // SAM conversion. This implementation is rewritten by sbt's macros too.
@compileTimeOnly("This can be used in += only.")
implicit def appendTaskKeySeq[T, V <: T]: Value[Seq[Task[T]], TaskKey[V]] = (_, _) => ???
implicit def appendTaskKeySeq[T, V <: T]: Value[Seq[Task[T]], TaskKey[V]] = (_, _) => ??? // SAM
implicit def appendList[T, V <: T]: Sequence[List[T], List[V], V] =
new Sequence[List[T], List[V], V] {
@ -66,6 +66,7 @@ object Append {
def appendValue(a: Vector[T], b: V): Vector[T] = a :+ (b: T)
}
// psst... these are implemented with SAM conversions
implicit def appendString: Value[String, String] = _ + _
implicit def appendInt: Value[Int, Int] = _ + _
implicit def appendLong: Value[Long, Long] = _ + _
@ -102,6 +103,7 @@ object Append {
a ++ b.map(new Source(_, AllPassFilter, NothingFilter))
}
// Implemented with SAM conversion short-hand
implicit def appendFunction[A, B]: Value[A => A, A => A] = _.andThen(_)
implicit def appendSideEffectToFunc[A, B]: Value[A => B, () => Unit] = (f, sideEffect) => {