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ByteInstances.scala
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ByteInstances.scala
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/*
* Copyright (c) 2015 Typelevel
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package cats.kernel
package instances
trait ByteInstances {
implicit val catsKernelStdOrderForByte: Order[Byte] with Hash[Byte] with BoundedEnumerable[Byte] =
new ByteOrder
implicit val catsKernelStdGroupForByte: CommutativeGroup[Byte] = new ByteGroup
}
class ByteGroup extends CommutativeGroup[Byte] {
def combine(x: Byte, y: Byte): Byte = (x + y).toByte
def empty: Byte = 0
def inverse(x: Byte): Byte = (-x).toByte
override def remove(x: Byte, y: Byte): Byte = (x - y).toByte
}
trait ByteEnumerable extends BoundedEnumerable[Byte] {
override def partialNext(a: Byte): Option[Byte] =
if (order.eqv(a, maxBound)) None else Some((a + 1).toByte)
override def partialPrevious(a: Byte): Option[Byte] =
if (order.eqv(a, minBound)) None else Some((a - 1).toByte)
}
trait ByteBounded extends LowerBounded[Byte] with UpperBounded[Byte] {
override def minBound: Byte = Byte.MinValue
override def maxBound: Byte = Byte.MaxValue
}
class ByteOrder extends Order[Byte] with Hash[Byte] with ByteBounded with ByteEnumerable { self =>
def hash(x: Byte): Int = x.hashCode()
def compare(x: Byte, y: Byte): Int =
if (x < y) -1 else if (x > y) 1 else 0
override def eqv(x: Byte, y: Byte): Boolean = x == y
override def neqv(x: Byte, y: Byte): Boolean = x != y
override def gt(x: Byte, y: Byte): Boolean = x > y
override def gteqv(x: Byte, y: Byte): Boolean = x >= y
override def lt(x: Byte, y: Byte): Boolean = x < y
override def lteqv(x: Byte, y: Byte): Boolean = x <= y
override def min(x: Byte, y: Byte): Byte =
java.lang.Math.min(x.toInt, y.toInt).toByte
override def max(x: Byte, y: Byte): Byte =
java.lang.Math.max(x.toInt, y.toInt).toByte
override val order: Order[Byte] = self
}