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BigDecimalInstances.scala
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BigDecimalInstances.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 BigDecimalInstances {
implicit val catsKernelStdOrderForBigDecimal: Order[BigDecimal] with Hash[BigDecimal] =
new BigDecimalOrder
implicit val catsKernelStdGroupForBigDecimal: CommutativeGroup[BigDecimal] =
new BigDecimalGroup
}
/**
* Note that combining, removing, and inverting `BigDecimal` values will use unlimited precision
* operations.
*
* This matches the behavior of Scala 2.12 and earlier versions, but not Scala 2.13, which means
* that `+` and `|+|` (or `sum` and `combineAll`) may not agree if you are working with values with
* limited-precision `MathContext`s.
*/
class BigDecimalGroup extends CommutativeGroup[BigDecimal] {
val empty: BigDecimal = BigDecimal(0)
def combine(x: BigDecimal, y: BigDecimal): BigDecimal = new BigDecimal(x.bigDecimal.add(y.bigDecimal), x.mc)
def inverse(x: BigDecimal): BigDecimal = new BigDecimal(x.bigDecimal.negate(), x.mc)
override def remove(x: BigDecimal, y: BigDecimal): BigDecimal =
new BigDecimal(x.bigDecimal.subtract(y.bigDecimal), x.mc)
}
class BigDecimalOrder extends Order[BigDecimal] with Hash[BigDecimal] {
def hash(x: BigDecimal): Int = x.hashCode()
def compare(x: BigDecimal, y: BigDecimal): Int = x.compare(y)
override def eqv(x: BigDecimal, y: BigDecimal): Boolean = x == y
override def neqv(x: BigDecimal, y: BigDecimal): Boolean = x != y
override def gt(x: BigDecimal, y: BigDecimal): Boolean = x > y
override def gteqv(x: BigDecimal, y: BigDecimal): Boolean = x >= y
override def lt(x: BigDecimal, y: BigDecimal): Boolean = x < y
override def lteqv(x: BigDecimal, y: BigDecimal): Boolean = x <= y
override def min(x: BigDecimal, y: BigDecimal): BigDecimal = x.min(y)
override def max(x: BigDecimal, y: BigDecimal): BigDecimal = x.max(y)
}