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BigIntInstances.scala
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BigIntInstances.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 BigIntInstances {
implicit val catsKernelStdOrderForBigInt: Order[BigInt] with Hash[BigInt] with UnboundedEnumerable[BigInt] =
new BigIntOrder
implicit val catsKernelStdGroupForBigInt: CommutativeGroup[BigInt] =
new BigIntGroup
}
class BigIntGroup extends CommutativeGroup[BigInt] {
val empty: BigInt = BigInt(0)
def combine(x: BigInt, y: BigInt): BigInt = x + y
def inverse(x: BigInt): BigInt = -x
override def remove(x: BigInt, y: BigInt): BigInt = x - y
}
trait BigIntUnboundedEnum extends UnboundedEnumerable[BigInt] {
override def next(a: BigInt): BigInt = a + 1
override def previous(a: BigInt): BigInt = a - 1
}
class BigIntOrder extends Order[BigInt] with Hash[BigInt] with BigIntUnboundedEnum {
def hash(x: BigInt): Int = x.hashCode()
def compare(x: BigInt, y: BigInt): Int = x.compare(y)
override def eqv(x: BigInt, y: BigInt): Boolean = x == y
override def neqv(x: BigInt, y: BigInt): Boolean = x != y
override def gt(x: BigInt, y: BigInt): Boolean = x > y
override def gteqv(x: BigInt, y: BigInt): Boolean = x >= y
override def lt(x: BigInt, y: BigInt): Boolean = x < y
override def lteqv(x: BigInt, y: BigInt): Boolean = x <= y
override def min(x: BigInt, y: BigInt): BigInt = x.min(y)
override def max(x: BigInt, y: BigInt): BigInt = x.max(y)
override def order: Order[BigInt] = this
}