smithy4s.kinds.PolyFunctions.scala Maven / Gradle / Ivy
/*
* Copyright 2021-2024 Disney Streaming
*
* Licensed under the Tomorrow Open Source Technology License, Version 1.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://disneystreaming.github.io/TOST-1.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package smithy4s.kinds
object PolyFunctions {
def mapErrorK[E, E1](f: E => E1): PolyFunction[Either[E, *], Either[E1, *]] =
new PolyFunction[Either[E, *], Either[E1, *]] {
def apply[A](either: Either[E, A]): Either[E1, A] = either.left.map(f)
}
}