diff options
Diffstat (limited to 'src/library/scala/collection/mutable/ArrayOps.scala')
| -rw-r--r-- | src/library/scala/collection/mutable/ArrayOps.scala | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/src/library/scala/collection/mutable/ArrayOps.scala b/src/library/scala/collection/mutable/ArrayOps.scala index e342e134b4..00491ef20e 100644 --- a/src/library/scala/collection/mutable/ArrayOps.scala +++ b/src/library/scala/collection/mutable/ArrayOps.scala @@ -114,10 +114,16 @@ trait ArrayOps[T] extends Any with ArrayLike[T, Array[T]] with CustomParalleliza * @tparam T2 the type of the second half of the element pairs * @param asPair an implicit conversion which asserts that the element type * of this Array is a pair. + * @param ct1 a class tag for T1 type parameter that is required to create an instance + * of Array[T1] + * @param ct2 a class tag for T2 type parameter that is required to create an instance + * of Array[T2] * @return a pair of Arrays, containing, respectively, the first and second half * of each element pair of this Array. */ - def unzip[T1: ClassTag, T2: ClassTag](implicit asPair: T => (T1, T2)): (Array[T1], Array[T2]) = { + // implementation NOTE: ct1 and ct2 can't be written as context bounds because desugared + // implicits are put in front of asPair parameter that is supposed to guide type inference + def unzip[T1, T2](implicit asPair: T => (T1, T2), ct1: ClassTag[T1], ct2: ClassTag[T2]): (Array[T1], Array[T2]) = { val a1 = new Array[T1](length) val a2 = new Array[T2](length) var i = 0 @@ -137,10 +143,19 @@ trait ArrayOps[T] extends Any with ArrayLike[T, Array[T]] with CustomParalleliza * @tparam T3 the type of the third of three elements in the triple * @param asTriple an implicit conversion which asserts that the element type * of this Array is a triple. + * @param ct1 a class tag for T1 type parameter that is required to create an instance + * of Array[T1] + * @param ct2 a class tag for T2 type parameter that is required to create an instance + * of Array[T2] + * @param ct3 a class tag for T3 type parameter that is required to create an instance + * of Array[T3] * @return a triple of Arrays, containing, respectively, the first, second, and third * elements from each element triple of this Array. */ - def unzip3[T1: ClassTag, T2: ClassTag, T3: ClassTag](implicit asTriple: T => (T1, T2, T3)): (Array[T1], Array[T2], Array[T3]) = { + // implementation NOTE: ct1, ct2, ct3 can't be written as context bounds because desugared + // implicits are put in front of asPair parameter that is supposed to guide type inference + def unzip3[T1, T2, T3](implicit asTriple: T => (T1, T2, T3), ct1: ClassTag[T1], ct2: ClassTag[T2], + ct3: ClassTag[T3]): (Array[T1], Array[T2], Array[T3]) = { val a1 = new Array[T1](length) val a2 = new Array[T2](length) val a3 = new Array[T3](length) |