src/main/java/com/google/devtools/build/skyframe/SkyValue.java

// Copyright 2014 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// 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 com.google.devtools.build.skyframe;

import java.io.PrintStream;

/** A return value of a {@code SkyFunction}. */
public interface SkyValue {

  /** Return whether this value was cleared to reduce memory use. */
  default boolean isCleared() {
    return false;
  }

  /** Print a representation of this value for debugging purposes. */
  default void debugPrint(PrintStream out) {
    // Just use toString.
    out.println(this);
  }
}