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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2002-2013, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala
package runtime
import scala.collection.{ TraversableLike, IterableLike }
import scala.collection.generic.{ CanBuildFrom => CBF }
import scala.language.{ higherKinds, implicitConversions }
/** See comment on ZippedTraversable2
* @define Coll `ZippedTraversable3`
* @define coll collection
* @define collectExample
* @define willNotTerminateInf
*/
trait ZippedTraversable3[+El1, +El2, +El3] extends Any {
def foreach[U](f: (El1, El2, El3) => U): Unit
}
object ZippedTraversable3 {
implicit def zippedTraversable3ToTraversable[El1, El2, El3](zz: ZippedTraversable3[El1, El2, El3]): Traversable[(El1, El2, El3)] = {
new scala.collection.AbstractTraversable[(El1, El2, El3)] {
def foreach[U](f: ((El1, El2, El3)) => U): Unit = zz foreach Function.untupled(f)
}
}
}
final class Tuple3Zipped[El1, Repr1, El2, Repr2, El3, Repr3](val colls: (TraversableLike[El1, Repr1], IterableLike[El2, Repr2], IterableLike[El3, Repr3]))
extends AnyVal with ZippedTraversable3[El1, El2, El3] {
def map[B, To](f: (El1, El2, El3) => B)(implicit cbf: CBF[Repr1, B, To]): To = {
val b = cbf(colls._1.repr)
val elems2 = colls._2.iterator
val elems3 = colls._3.iterator
for (el1 <- colls._1) {
if (elems2.hasNext && elems3.hasNext)
b += f(el1, elems2.next(), elems3.next())
else
return b.result()
}
b.result()
}
def flatMap[B, To](f: (El1, El2, El3) => TraversableOnce[B])(implicit cbf: CBF[Repr1, B, To]): To = {
val b = cbf(colls._1.repr)
val elems2 = colls._2.iterator
val elems3 = colls._3.iterator
for (el1 <- colls._1) {
if (elems2.hasNext && elems3.hasNext)
b ++= f(el1, elems2.next(), elems3.next())
else
return b.result()
}
b.result()
}
def filter[To1, To2, To3](f: (El1, El2, El3) => Boolean)(
implicit cbf1: CBF[Repr1, El1, To1],
cbf2: CBF[Repr2, El2, To2],
cbf3: CBF[Repr3, El3, To3]): (To1, To2, To3) = {
val b1 = cbf1(colls._1.repr)
val b2 = cbf2(colls._2.repr)
val b3 = cbf3(colls._3.repr)
val elems2 = colls._2.iterator
val elems3 = colls._3.iterator
def result = (b1.result(), b2.result(), b3.result())
for (el1 <- colls._1) {
if (elems2.hasNext && elems3.hasNext) {
val el2 = elems2.next()
val el3 = elems3.next()
if (f(el1, el2, el3)) {
b1 += el1
b2 += el2
b3 += el3
}
}
else return result
}
result
}
def exists(@deprecatedName('f) p: (El1, El2, El3) => Boolean): Boolean = {
val elems2 = colls._2.iterator
val elems3 = colls._3.iterator
for (el1 <- colls._1) {
if (elems2.hasNext && elems3.hasNext) {
if (p(el1, elems2.next(), elems3.next()))
return true
}
else return false
}
false
}
def forall(@deprecatedName('f) p: (El1, El2, El3) => Boolean): Boolean =
!exists((x, y, z) => !p(x, y, z))
def foreach[U](f: (El1, El2, El3) => U): Unit = {
val elems2 = colls._2.iterator
val elems3 = colls._3.iterator
for (el1 <- colls._1) {
if (elems2.hasNext && elems3.hasNext)
f(el1, elems2.next(), elems3.next())
else
return
}
}
}
object Tuple3Zipped {
final class Ops[T1, T2, T3](val x: (T1, T2, T3)) extends AnyVal {
def invert[El1, CC1[X] <: TraversableOnce[X], El2, CC2[X] <: TraversableOnce[X], El3, CC3[X] <: TraversableOnce[X], That]
(implicit w1: T1 <:< CC1[El1],
w2: T2 <:< CC2[El2],
w3: T3 <:< CC3[El3],
bf: scala.collection.generic.CanBuildFrom[CC1[_], (El1, El2, El3), That]
): That = {
val buf = bf(x._1)
val it1 = x._1.toIterator
val it2 = x._2.toIterator
val it3 = x._3.toIterator
while (it1.hasNext && it2.hasNext && it3.hasNext)
buf += ((it1.next(), it2.next(), it3.next()))
buf.result()
}
def zipped[El1, Repr1, El2, Repr2, El3, Repr3]
(implicit w1: T1 => TraversableLike[El1, Repr1],
w2: T2 => IterableLike[El2, Repr2],
w3: T3 => IterableLike[El3, Repr3]
): Tuple3Zipped[El1, Repr1, El2, Repr2, El3, Repr3] = new Tuple3Zipped((x._1, x._2, x._3))
}
}
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