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/*
 *  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

final class Lazy[A](make: () => A) {
  private[this] var thunk: () => A = make
  lazy val value: A = {
    val result = thunk()
    thunk = null
    result
  }

  def map[B](f: A => B): Lazy[B] = new Lazy(() => f(make()))
}

object Lazy {
  def apply[A](a: => A): Lazy[A] = new Lazy(() => a)
}