-
-
Notifications
You must be signed in to change notification settings - Fork 1.2k
/
BitSetInstances.scala
52 lines (44 loc) · 1.98 KB
/
BitSetInstances.scala
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
/*
* 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
import scala.collection.immutable.BitSet
trait BitSetInstances {
implicit val catsKernelStdOrderForBitSet: PartialOrder[BitSet] with Hash[BitSet] =
new BitSetPartialOrder
implicit val catsKernelStdSemilatticeForBitSet: BoundedSemilattice[BitSet] =
new BitSetSemilattice
}
class BitSetPartialOrder extends PartialOrder[BitSet] with Hash[BitSet] {
def hash(x: BitSet): Int = x.hashCode()
def partialCompare(x: BitSet, y: BitSet): Double =
if (x eq y) 0.0
else if (x.size < y.size) if (x.subsetOf(y)) -1.0 else Double.NaN
else if (y.size < x.size) if (y.subsetOf(x)) 1.0 else Double.NaN
else if (x == y) 0.0
else Double.NaN
override def eqv(x: BitSet, y: BitSet): Boolean =
x == y
}
class BitSetSemilattice extends BoundedSemilattice[BitSet] {
def empty: BitSet = BitSet.empty
def combine(x: BitSet, y: BitSet): BitSet = x | y
}