/
ZipLazyList.scala
52 lines (41 loc) · 2.35 KB
/
ZipLazyList.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
package data
class ZipLazyList[A](val value: LazyList[A]) extends AnyVal
object ZipLazyList {
def apply[A](value: LazyList[A]): ZipLazyList[A] = new ZipLazyList(value)
implicit val catsDataAlternativeForZipLazyList: Alternative[ZipLazyList] with CommutativeApplicative[ZipLazyList] =
new Alternative[ZipLazyList] with CommutativeApplicative[ZipLazyList] {
def pure[A](x: A): ZipLazyList[A] = new ZipLazyList(LazyList.continually(x))
override def map[A, B](fa: ZipLazyList[A])(f: (A) => B): ZipLazyList[B] =
ZipLazyList(fa.value.map(f))
def ap[A, B](ff: ZipLazyList[A => B])(fa: ZipLazyList[A]): ZipLazyList[B] =
ZipLazyList(ff.value.lazyZip(fa.value).map(_.apply(_)))
override def product[A, B](fa: ZipLazyList[A], fb: ZipLazyList[B]): ZipLazyList[(A, B)] =
ZipLazyList(fa.value.zip(fb.value))
def empty[A]: ZipLazyList[A] = ZipLazyList(LazyList.empty[A])
def combineK[A](x: ZipLazyList[A], y: ZipLazyList[A]): ZipLazyList[A] =
ZipLazyList(cats.instances.lazyList.catsStdInstancesForLazyList.combineK(x.value, y.value))
}
implicit def catsDataEqForZipLazyList[A: Eq]: Eq[ZipLazyList[A]] =
Eq.by((_: ZipLazyList[A]).value)(cats.kernel.instances.lazyList.catsKernelStdEqForLazyList[A])
}