xsbt.api.SafeLazyProxy.scala Maven / Gradle / Ivy

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Incremental compiler of Scala

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/*
 * Zinc - The incremental compiler for Scala.
 * Copyright Scala Center, Lightbend, and Mark Harrah
 *
 * Licensed under Apache License 2.0
 * SPDX-License-Identifier: Apache-2.0
 *
 * See the NOTICE file distributed with this work for
 * additional information regarding copyright ownership.
 */

package xsbti.api

import java.util.function.Supplier

/**
 * Proxy `SafeLazy` functionality from the Java implementation
 * implementation in xsbt.api.SafeLazy to Scala helpers.
 *
 * The implementation of these helpers are not reused between each
 * other because they create intermediate anonymous functions and
 * the price of a new object in this hot path is not worth it.
 */
object SafeLazyProxy {

  /**
   * Return a lazy implementation of a Scala by-name parameter.
   */
  def apply[T](s: => T): Lazy[T] = {
    val sbtThunk = new Supplier[T] { override def get() = s }
    SafeLazy.apply(sbtThunk)
  }

  /**
   * Return a lazy implementation of a strict value.
   */
  def strict[T](s: T): Lazy[T] = {
    val sbtThunk = new Supplier[T] { override def get() = s }
    SafeLazy.apply(sbtThunk)
  }
}