*     source-compatible</a> since 4.0)
 */
@GwtCompatible
/*
 * The type parameter is <T> rather than <T extends @Nullable> so that we can use T in the
 * doEquivalent and doHash methods to indicate that the parameter cannot be null.
 */
@SuppressWarnings("UngroupedOverloads")
public abstract class Equivalence<T> {
  /** Constructor for use by subclasses. */
  protected Equivalence() {}

  /**

  }

  @Override
  protected boolean doEquivalent(F a, F b) {
    return resultEquivalence.equivalent(function.apply(a), function.apply(b));
  }

  @Override
  protected int doHash(F a) {
    return resultEquivalence.hash(function.apply(a));
  }

  @Override
  public boolean equals(@Nullable Object obj) {
    if (obj == this) {
      return true;
    }

      if (!elementEquivalence.equivalent(iteratorA.next(), iteratorB.next())) {
        return false;
      }
    }

    return !iteratorA.hasNext() && !iteratorB.hasNext();
  }

  @Override
  protected int doHash(Iterable<T> iterable) {
    int hash = 78721;
    for (T element : iterable) {
      hash = hash * 24943 + elementEquivalence.hash(element);
    }
    return hash;
  }

  @Override

      if (!elementEquivalence.equivalent(iteratorA.next(), iteratorB.next())) {
        return false;
      }
    }

    return !iteratorA.hasNext() && !iteratorB.hasNext();
  }

  @Override
  protected int doHash(Iterable<T> iterable) {
    int hash = 78721;
    for (T element : iterable) {
      hash = hash * 24943 + elementEquivalence.hash(element);
    }
    return hash;
  }

  @Override

    return new Equivalence<T>() {
      @Override
      protected boolean doEquivalent(T a, T b) {
        return false;
      }

      @Override
      protected int doHash(T t) {
        return 0;
      }

      final String string = paramString(Equivalence.class, generateInt());

      @Override
      public String toString() {
        return string;
      }

    return new Equivalence<T>() {
      @Override
      protected boolean doEquivalent(T a, T b) {
        return false;
      }

      @Override
      protected int doHash(T t) {
        return 0;
      }

      final String string = paramString(Equivalence.class, generateInt());

      @Override
      public String toString() {
        return string;
      }

        new Equivalence<Object>() {
          @Override
          protected boolean doEquivalent(Object a, Object b) {
            return false;
          }

          @Override
          protected int doHash(Object t) {
            return 0;
          }
        };

    MapMakerInternalMap<Object, Object, ?, ?> map =
        makeMap(createMapMaker().keyEquivalence(testEquivalence));

        new Equivalence<Object>() {
          @Override
          protected boolean doEquivalent(Object a, Object b) {
            return false;
          }

          @Override
          protected int doHash(Object t) {
            return 0;
          }
        };

    MapMakerInternalMap<Object, Object, ?, ?> map =
        makeMap(createMapMaker().keyEquivalence(testEquivalence));

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.nio.charset.Charset

tasks.register("verifyIsProductionBuildEnvironment") {
    doLast {
        val systemCharset = Charset.defaultCharset().name()
        assert(systemCharset == "UTF-8") {
            "Platform encoding must be UTF-8. Is currently $systemCharset. Set -Dfile.encoding=UTF-8"
        }
    }

wrapperUpdateTask("rc", "release-candidate")
wrapperUpdateTask("current", "current")

tasks.withType<Wrapper>().configureEach {
    val jvmOpts = "-Dfile.encoding=UTF-8"
    inputs.property("jvmOpts", jvmOpts)
    doLast {
        val optsEnvVar = "DEFAULT_JVM_OPTS"
        scriptFile.writeText(scriptFile.readText().replace("$optsEnvVar='", "$optsEnvVar='$jvmOpts "))