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author | Seth Tisue <seth@tisue.net> | 2017-02-16 14:14:39 -0800 |
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committer | Seth Tisue <seth@tisue.net> | 2017-02-16 14:34:18 -0800 |
commit | 04c45e15f198c3e33b0e6709fb8ca5267f129fac (patch) | |
tree | 215307f083dba29d2c53c83ca3702c8d4a34d27f /src/library/scala/collection/mutable/ArrayOps.scala | |
parent | 6be69d6d5e710e2022772a326a48baf093a70508 (diff) | |
parent | 096502880900d8daa75d813c63ac88aa50c25ef0 (diff) | |
download | scala-04c45e15f198c3e33b0e6709fb8ca5267f129fac.tar.gz scala-04c45e15f198c3e33b0e6709fb8ca5267f129fac.tar.bz2 scala-04c45e15f198c3e33b0e6709fb8ca5267f129fac.zip |
Merge commit '0965028809' into merge-2.11.x-to-2.12.x-20170214
Diffstat (limited to 'src/library/scala/collection/mutable/ArrayOps.scala')
-rw-r--r-- | src/library/scala/collection/mutable/ArrayOps.scala | 74 |
1 files changed, 64 insertions, 10 deletions
diff --git a/src/library/scala/collection/mutable/ArrayOps.scala b/src/library/scala/collection/mutable/ArrayOps.scala index 29382134aa..5de3dad256 100644 --- a/src/library/scala/collection/mutable/ArrayOps.scala +++ b/src/library/scala/collection/mutable/ArrayOps.scala @@ -10,6 +10,8 @@ package scala package collection package mutable +import java.util + import scala.reflect.ClassTag import parallel.mutable.ParArray @@ -180,6 +182,23 @@ sealed trait ArrayOps[T] extends Any with ArrayLike[T, Array[T]] with CustomPara def seq = thisCollection } +/** to provide binary compat for 2.11 and 2.12 this class contains + * functionality that should be migrated to ArrayOps in 2.13 + * + */ +private[mutable] sealed trait ArrayOpsImpl[T] extends Any with ArrayOps[T] { + override final def slice(from: Int, until: Int): Array[T] = { + val start = if (from < 0) 0 else from + if (until <= start || start >= repr.length) + return emptyImpl + val end = if (until > length) length else until + sliceImpl(start, end) + } + protected def emptyImpl: Array[T] + protected def sliceImpl(from: Int, until: Int): Array[T] + +} + /** * A companion object for `ArrayOps`. * @@ -187,12 +206,24 @@ sealed trait ArrayOps[T] extends Any with ArrayLike[T, Array[T]] with CustomPara */ object ArrayOps { + private val emptyByteArray = new Array[Byte](0) + private val emptyShortArray = new Array[Short](0) + private val emptyIntArray = new Array[Int](0) + private val emptyLongArray = new Array[Long](0) + private val emptyFloatArray = new Array[Float](0) + private val emptyDoubleArray = new Array[Double](0) + private val emptyUnitArray = new Array[Unit](0) + private val emptyCharArray = new Array[Char](0) + private val emptyBooleanArray = new Array[Boolean](0) + /** A subclass of `ArrayOps` for arrays containing reference types. */ - final class ofRef[T <: AnyRef](override val repr: Array[T]) extends AnyVal with ArrayOps[T] with ArrayLike[T, Array[T]] { + final class ofRef[T <: AnyRef](override val repr: Array[T]) extends AnyVal with ArrayOpsImpl[T] with ArrayLike[T, Array[T]] { override protected[this] def thisCollection: WrappedArray[T] = new WrappedArray.ofRef[T](repr) override protected[this] def toCollection(repr: Array[T]): WrappedArray[T] = new WrappedArray.ofRef[T](repr) override protected[this] def newBuilder = new ArrayBuilder.ofRef[T]()(ClassTag[T](repr.getClass.getComponentType)) + protected override def emptyImpl:Array[T] = util.Arrays.copyOf[T](repr,0) + protected override def sliceImpl(from: Int, until: Int): Array[T] = util.Arrays.copyOfRange[T](repr, from, until) def length: Int = repr.length def apply(index: Int): T = repr(index) @@ -200,11 +231,13 @@ object ArrayOps { } /** A subclass of `ArrayOps` for arrays containing `Byte`s. */ - final class ofByte(override val repr: Array[Byte]) extends AnyVal with ArrayOps[Byte] with ArrayLike[Byte, Array[Byte]] { + final class ofByte(override val repr: Array[Byte]) extends AnyVal with ArrayOpsImpl[Byte] with ArrayLike[Byte, Array[Byte]] { override protected[this] def thisCollection: WrappedArray[Byte] = new WrappedArray.ofByte(repr) override protected[this] def toCollection(repr: Array[Byte]): WrappedArray[Byte] = new WrappedArray.ofByte(repr) override protected[this] def newBuilder = new ArrayBuilder.ofByte + protected override def emptyImpl = emptyByteArray + protected override def sliceImpl(from: Int, until: Int) = util.Arrays.copyOfRange(repr, from, until) def length: Int = repr.length def apply(index: Int): Byte = repr(index) @@ -212,11 +245,13 @@ object ArrayOps { } /** A subclass of `ArrayOps` for arrays containing `Short`s. */ - final class ofShort(override val repr: Array[Short]) extends AnyVal with ArrayOps[Short] with ArrayLike[Short, Array[Short]] { + final class ofShort(override val repr: Array[Short]) extends AnyVal with ArrayOpsImpl[Short] with ArrayLike[Short, Array[Short]] { override protected[this] def thisCollection: WrappedArray[Short] = new WrappedArray.ofShort(repr) override protected[this] def toCollection(repr: Array[Short]): WrappedArray[Short] = new WrappedArray.ofShort(repr) override protected[this] def newBuilder = new ArrayBuilder.ofShort + protected override def emptyImpl = emptyShortArray + protected override def sliceImpl(from: Int, until: Int) = util.Arrays.copyOfRange(repr, from, until) def length: Int = repr.length def apply(index: Int): Short = repr(index) @@ -224,11 +259,13 @@ object ArrayOps { } /** A subclass of `ArrayOps` for arrays containing `Char`s. */ - final class ofChar(override val repr: Array[Char]) extends AnyVal with ArrayOps[Char] with ArrayLike[Char, Array[Char]] { + final class ofChar(override val repr: Array[Char]) extends AnyVal with ArrayOpsImpl[Char] with ArrayLike[Char, Array[Char]] { override protected[this] def thisCollection: WrappedArray[Char] = new WrappedArray.ofChar(repr) override protected[this] def toCollection(repr: Array[Char]): WrappedArray[Char] = new WrappedArray.ofChar(repr) override protected[this] def newBuilder = new ArrayBuilder.ofChar + protected override def emptyImpl = emptyCharArray + protected override def sliceImpl(from: Int, until: Int) = util.Arrays.copyOfRange(repr, from, until) def length: Int = repr.length def apply(index: Int): Char = repr(index) @@ -236,11 +273,13 @@ object ArrayOps { } /** A subclass of `ArrayOps` for arrays containing `Int`s. */ - final class ofInt(override val repr: Array[Int]) extends AnyVal with ArrayOps[Int] with ArrayLike[Int, Array[Int]] { + final class ofInt(override val repr: Array[Int]) extends AnyVal with ArrayOpsImpl[Int] with ArrayLike[Int, Array[Int]] { override protected[this] def thisCollection: WrappedArray[Int] = new WrappedArray.ofInt(repr) override protected[this] def toCollection(repr: Array[Int]): WrappedArray[Int] = new WrappedArray.ofInt(repr) override protected[this] def newBuilder = new ArrayBuilder.ofInt + protected override def emptyImpl = emptyIntArray + protected override def sliceImpl(from: Int, until: Int) = util.Arrays.copyOfRange(repr, from, until) def length: Int = repr.length def apply(index: Int): Int = repr(index) @@ -248,11 +287,13 @@ object ArrayOps { } /** A subclass of `ArrayOps` for arrays containing `Long`s. */ - final class ofLong(override val repr: Array[Long]) extends AnyVal with ArrayOps[Long] with ArrayLike[Long, Array[Long]] { + final class ofLong(override val repr: Array[Long]) extends AnyVal with ArrayOpsImpl[Long] with ArrayLike[Long, Array[Long]] { override protected[this] def thisCollection: WrappedArray[Long] = new WrappedArray.ofLong(repr) override protected[this] def toCollection(repr: Array[Long]): WrappedArray[Long] = new WrappedArray.ofLong(repr) override protected[this] def newBuilder = new ArrayBuilder.ofLong + protected override def emptyImpl = emptyLongArray + protected override def sliceImpl(from: Int, until: Int) = util.Arrays.copyOfRange(repr, from, until) def length: Int = repr.length def apply(index: Int): Long = repr(index) @@ -260,11 +301,13 @@ object ArrayOps { } /** A subclass of `ArrayOps` for arrays containing `Float`s. */ - final class ofFloat(override val repr: Array[Float]) extends AnyVal with ArrayOps[Float] with ArrayLike[Float, Array[Float]] { + final class ofFloat(override val repr: Array[Float]) extends AnyVal with ArrayOpsImpl[Float] with ArrayLike[Float, Array[Float]] { override protected[this] def thisCollection: WrappedArray[Float] = new WrappedArray.ofFloat(repr) override protected[this] def toCollection(repr: Array[Float]): WrappedArray[Float] = new WrappedArray.ofFloat(repr) override protected[this] def newBuilder = new ArrayBuilder.ofFloat + protected override def emptyImpl = emptyFloatArray + protected override def sliceImpl(from: Int, until: Int) = util.Arrays.copyOfRange(repr, from, until) def length: Int = repr.length def apply(index: Int): Float = repr(index) @@ -272,11 +315,13 @@ object ArrayOps { } /** A subclass of `ArrayOps` for arrays containing `Double`s. */ - final class ofDouble(override val repr: Array[Double]) extends AnyVal with ArrayOps[Double] with ArrayLike[Double, Array[Double]] { + final class ofDouble(override val repr: Array[Double]) extends AnyVal with ArrayOpsImpl[Double] with ArrayLike[Double, Array[Double]] { override protected[this] def thisCollection: WrappedArray[Double] = new WrappedArray.ofDouble(repr) override protected[this] def toCollection(repr: Array[Double]): WrappedArray[Double] = new WrappedArray.ofDouble(repr) override protected[this] def newBuilder = new ArrayBuilder.ofDouble + protected override def emptyImpl = emptyDoubleArray + protected override def sliceImpl(from: Int, until: Int) = util.Arrays.copyOfRange(repr, from, until) def length: Int = repr.length def apply(index: Int): Double = repr(index) @@ -284,11 +329,13 @@ object ArrayOps { } /** A subclass of `ArrayOps` for arrays containing `Boolean`s. */ - final class ofBoolean(override val repr: Array[Boolean]) extends AnyVal with ArrayOps[Boolean] with ArrayLike[Boolean, Array[Boolean]] { + final class ofBoolean(override val repr: Array[Boolean]) extends AnyVal with ArrayOpsImpl[Boolean] with ArrayLike[Boolean, Array[Boolean]] { override protected[this] def thisCollection: WrappedArray[Boolean] = new WrappedArray.ofBoolean(repr) override protected[this] def toCollection(repr: Array[Boolean]): WrappedArray[Boolean] = new WrappedArray.ofBoolean(repr) override protected[this] def newBuilder = new ArrayBuilder.ofBoolean + protected override def emptyImpl = emptyBooleanArray + protected override def sliceImpl(from: Int, until: Int) = util.Arrays.copyOfRange(repr, from, until) def length: Int = repr.length def apply(index: Int): Boolean = repr(index) @@ -296,11 +343,18 @@ object ArrayOps { } /** A subclass of `ArrayOps` for arrays of `Unit` types. */ - final class ofUnit(override val repr: Array[Unit]) extends AnyVal with ArrayOps[Unit] with ArrayLike[Unit, Array[Unit]] { + final class ofUnit(override val repr: Array[Unit]) extends AnyVal with ArrayOpsImpl[Unit] with ArrayLike[Unit, Array[Unit]] { override protected[this] def thisCollection: WrappedArray[Unit] = new WrappedArray.ofUnit(repr) override protected[this] def toCollection(repr: Array[Unit]): WrappedArray[Unit] = new WrappedArray.ofUnit(repr) override protected[this] def newBuilder = new ArrayBuilder.ofUnit + protected override def emptyImpl = emptyUnitArray + protected override def sliceImpl(from: Int, until: Int) = { + // cant use util.Arrays.copyOfRange[Unit](repr, from, until) - Unit is special and doesnt compile + val res = new Array[Unit](until-from) + System.arraycopy(repr, from, res, 0, res.size) + res + } def length: Int = repr.length def apply(index: Int): Unit = repr(index) |